NIU: Add Sun CP3260 ATCA blade support
[linux-2.6.git] / drivers / net / niu.c
1 /* niu.c: Neptune ethernet driver.
2  *
3  * Copyright (C) 2007, 2008 David S. Miller (davem@davemloft.net)
4  */
5
6 #include <linux/module.h>
7 #include <linux/init.h>
8 #include <linux/pci.h>
9 #include <linux/dma-mapping.h>
10 #include <linux/netdevice.h>
11 #include <linux/ethtool.h>
12 #include <linux/etherdevice.h>
13 #include <linux/platform_device.h>
14 #include <linux/delay.h>
15 #include <linux/bitops.h>
16 #include <linux/mii.h>
17 #include <linux/if_ether.h>
18 #include <linux/if_vlan.h>
19 #include <linux/ip.h>
20 #include <linux/in.h>
21 #include <linux/ipv6.h>
22 #include <linux/log2.h>
23 #include <linux/jiffies.h>
24 #include <linux/crc32.h>
25
26 #include <linux/io.h>
27
28 #ifdef CONFIG_SPARC64
29 #include <linux/of_device.h>
30 #endif
31
32 #include "niu.h"
33
34 #define DRV_MODULE_NAME         "niu"
35 #define PFX DRV_MODULE_NAME     ": "
36 #define DRV_MODULE_VERSION      "0.9"
37 #define DRV_MODULE_RELDATE      "May 4, 2008"
38
39 static char version[] __devinitdata =
40         DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
41
42 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
43 MODULE_DESCRIPTION("NIU ethernet driver");
44 MODULE_LICENSE("GPL");
45 MODULE_VERSION(DRV_MODULE_VERSION);
46
47 #ifndef DMA_44BIT_MASK
48 #define DMA_44BIT_MASK  0x00000fffffffffffULL
49 #endif
50
51 #ifndef readq
52 static u64 readq(void __iomem *reg)
53 {
54         return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
55 }
56
57 static void writeq(u64 val, void __iomem *reg)
58 {
59         writel(val & 0xffffffff, reg);
60         writel(val >> 32, reg + 0x4UL);
61 }
62 #endif
63
64 static struct pci_device_id niu_pci_tbl[] = {
65         {PCI_DEVICE(PCI_VENDOR_ID_SUN, 0xabcd)},
66         {}
67 };
68
69 MODULE_DEVICE_TABLE(pci, niu_pci_tbl);
70
71 #define NIU_TX_TIMEOUT                  (5 * HZ)
72
73 #define nr64(reg)               readq(np->regs + (reg))
74 #define nw64(reg, val)          writeq((val), np->regs + (reg))
75
76 #define nr64_mac(reg)           readq(np->mac_regs + (reg))
77 #define nw64_mac(reg, val)      writeq((val), np->mac_regs + (reg))
78
79 #define nr64_ipp(reg)           readq(np->regs + np->ipp_off + (reg))
80 #define nw64_ipp(reg, val)      writeq((val), np->regs + np->ipp_off + (reg))
81
82 #define nr64_pcs(reg)           readq(np->regs + np->pcs_off + (reg))
83 #define nw64_pcs(reg, val)      writeq((val), np->regs + np->pcs_off + (reg))
84
85 #define nr64_xpcs(reg)          readq(np->regs + np->xpcs_off + (reg))
86 #define nw64_xpcs(reg, val)     writeq((val), np->regs + np->xpcs_off + (reg))
87
88 #define NIU_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
89
90 static int niu_debug;
91 static int debug = -1;
92 module_param(debug, int, 0);
93 MODULE_PARM_DESC(debug, "NIU debug level");
94
95 #define niudbg(TYPE, f, a...) \
96 do {    if ((np)->msg_enable & NETIF_MSG_##TYPE) \
97                 printk(KERN_DEBUG PFX f, ## a); \
98 } while (0)
99
100 #define niuinfo(TYPE, f, a...) \
101 do {    if ((np)->msg_enable & NETIF_MSG_##TYPE) \
102                 printk(KERN_INFO PFX f, ## a); \
103 } while (0)
104
105 #define niuwarn(TYPE, f, a...) \
106 do {    if ((np)->msg_enable & NETIF_MSG_##TYPE) \
107                 printk(KERN_WARNING PFX f, ## a); \
108 } while (0)
109
110 #define niu_lock_parent(np, flags) \
111         spin_lock_irqsave(&np->parent->lock, flags)
112 #define niu_unlock_parent(np, flags) \
113         spin_unlock_irqrestore(&np->parent->lock, flags)
114
115 static int serdes_init_10g_serdes(struct niu *np);
116
117 static int __niu_wait_bits_clear_mac(struct niu *np, unsigned long reg,
118                                      u64 bits, int limit, int delay)
119 {
120         while (--limit >= 0) {
121                 u64 val = nr64_mac(reg);
122
123                 if (!(val & bits))
124                         break;
125                 udelay(delay);
126         }
127         if (limit < 0)
128                 return -ENODEV;
129         return 0;
130 }
131
132 static int __niu_set_and_wait_clear_mac(struct niu *np, unsigned long reg,
133                                         u64 bits, int limit, int delay,
134                                         const char *reg_name)
135 {
136         int err;
137
138         nw64_mac(reg, bits);
139         err = __niu_wait_bits_clear_mac(np, reg, bits, limit, delay);
140         if (err)
141                 dev_err(np->device, PFX "%s: bits (%llx) of register %s "
142                         "would not clear, val[%llx]\n",
143                         np->dev->name, (unsigned long long) bits, reg_name,
144                         (unsigned long long) nr64_mac(reg));
145         return err;
146 }
147
148 #define niu_set_and_wait_clear_mac(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
149 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
150         __niu_set_and_wait_clear_mac(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
151 })
152
153 static int __niu_wait_bits_clear_ipp(struct niu *np, unsigned long reg,
154                                      u64 bits, int limit, int delay)
155 {
156         while (--limit >= 0) {
157                 u64 val = nr64_ipp(reg);
158
159                 if (!(val & bits))
160                         break;
161                 udelay(delay);
162         }
163         if (limit < 0)
164                 return -ENODEV;
165         return 0;
166 }
167
168 static int __niu_set_and_wait_clear_ipp(struct niu *np, unsigned long reg,
169                                         u64 bits, int limit, int delay,
170                                         const char *reg_name)
171 {
172         int err;
173         u64 val;
174
175         val = nr64_ipp(reg);
176         val |= bits;
177         nw64_ipp(reg, val);
178
179         err = __niu_wait_bits_clear_ipp(np, reg, bits, limit, delay);
180         if (err)
181                 dev_err(np->device, PFX "%s: bits (%llx) of register %s "
182                         "would not clear, val[%llx]\n",
183                         np->dev->name, (unsigned long long) bits, reg_name,
184                         (unsigned long long) nr64_ipp(reg));
185         return err;
186 }
187
188 #define niu_set_and_wait_clear_ipp(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
189 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
190         __niu_set_and_wait_clear_ipp(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
191 })
192
193 static int __niu_wait_bits_clear(struct niu *np, unsigned long reg,
194                                  u64 bits, int limit, int delay)
195 {
196         while (--limit >= 0) {
197                 u64 val = nr64(reg);
198
199                 if (!(val & bits))
200                         break;
201                 udelay(delay);
202         }
203         if (limit < 0)
204                 return -ENODEV;
205         return 0;
206 }
207
208 #define niu_wait_bits_clear(NP, REG, BITS, LIMIT, DELAY) \
209 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
210         __niu_wait_bits_clear(NP, REG, BITS, LIMIT, DELAY); \
211 })
212
213 static int __niu_set_and_wait_clear(struct niu *np, unsigned long reg,
214                                     u64 bits, int limit, int delay,
215                                     const char *reg_name)
216 {
217         int err;
218
219         nw64(reg, bits);
220         err = __niu_wait_bits_clear(np, reg, bits, limit, delay);
221         if (err)
222                 dev_err(np->device, PFX "%s: bits (%llx) of register %s "
223                         "would not clear, val[%llx]\n",
224                         np->dev->name, (unsigned long long) bits, reg_name,
225                         (unsigned long long) nr64(reg));
226         return err;
227 }
228
229 #define niu_set_and_wait_clear(NP, REG, BITS, LIMIT, DELAY, REG_NAME) \
230 ({      BUILD_BUG_ON(LIMIT <= 0 || DELAY < 0); \
231         __niu_set_and_wait_clear(NP, REG, BITS, LIMIT, DELAY, REG_NAME); \
232 })
233
234 static void niu_ldg_rearm(struct niu *np, struct niu_ldg *lp, int on)
235 {
236         u64 val = (u64) lp->timer;
237
238         if (on)
239                 val |= LDG_IMGMT_ARM;
240
241         nw64(LDG_IMGMT(lp->ldg_num), val);
242 }
243
244 static int niu_ldn_irq_enable(struct niu *np, int ldn, int on)
245 {
246         unsigned long mask_reg, bits;
247         u64 val;
248
249         if (ldn < 0 || ldn > LDN_MAX)
250                 return -EINVAL;
251
252         if (ldn < 64) {
253                 mask_reg = LD_IM0(ldn);
254                 bits = LD_IM0_MASK;
255         } else {
256                 mask_reg = LD_IM1(ldn - 64);
257                 bits = LD_IM1_MASK;
258         }
259
260         val = nr64(mask_reg);
261         if (on)
262                 val &= ~bits;
263         else
264                 val |= bits;
265         nw64(mask_reg, val);
266
267         return 0;
268 }
269
270 static int niu_enable_ldn_in_ldg(struct niu *np, struct niu_ldg *lp, int on)
271 {
272         struct niu_parent *parent = np->parent;
273         int i;
274
275         for (i = 0; i <= LDN_MAX; i++) {
276                 int err;
277
278                 if (parent->ldg_map[i] != lp->ldg_num)
279                         continue;
280
281                 err = niu_ldn_irq_enable(np, i, on);
282                 if (err)
283                         return err;
284         }
285         return 0;
286 }
287
288 static int niu_enable_interrupts(struct niu *np, int on)
289 {
290         int i;
291
292         for (i = 0; i < np->num_ldg; i++) {
293                 struct niu_ldg *lp = &np->ldg[i];
294                 int err;
295
296                 err = niu_enable_ldn_in_ldg(np, lp, on);
297                 if (err)
298                         return err;
299         }
300         for (i = 0; i < np->num_ldg; i++)
301                 niu_ldg_rearm(np, &np->ldg[i], on);
302
303         return 0;
304 }
305
306 static u32 phy_encode(u32 type, int port)
307 {
308         return (type << (port * 2));
309 }
310
311 static u32 phy_decode(u32 val, int port)
312 {
313         return (val >> (port * 2)) & PORT_TYPE_MASK;
314 }
315
316 static int mdio_wait(struct niu *np)
317 {
318         int limit = 1000;
319         u64 val;
320
321         while (--limit > 0) {
322                 val = nr64(MIF_FRAME_OUTPUT);
323                 if ((val >> MIF_FRAME_OUTPUT_TA_SHIFT) & 0x1)
324                         return val & MIF_FRAME_OUTPUT_DATA;
325
326                 udelay(10);
327         }
328
329         return -ENODEV;
330 }
331
332 static int mdio_read(struct niu *np, int port, int dev, int reg)
333 {
334         int err;
335
336         nw64(MIF_FRAME_OUTPUT, MDIO_ADDR_OP(port, dev, reg));
337         err = mdio_wait(np);
338         if (err < 0)
339                 return err;
340
341         nw64(MIF_FRAME_OUTPUT, MDIO_READ_OP(port, dev));
342         return mdio_wait(np);
343 }
344
345 static int mdio_write(struct niu *np, int port, int dev, int reg, int data)
346 {
347         int err;
348
349         nw64(MIF_FRAME_OUTPUT, MDIO_ADDR_OP(port, dev, reg));
350         err = mdio_wait(np);
351         if (err < 0)
352                 return err;
353
354         nw64(MIF_FRAME_OUTPUT, MDIO_WRITE_OP(port, dev, data));
355         err = mdio_wait(np);
356         if (err < 0)
357                 return err;
358
359         return 0;
360 }
361
362 static int mii_read(struct niu *np, int port, int reg)
363 {
364         nw64(MIF_FRAME_OUTPUT, MII_READ_OP(port, reg));
365         return mdio_wait(np);
366 }
367
368 static int mii_write(struct niu *np, int port, int reg, int data)
369 {
370         int err;
371
372         nw64(MIF_FRAME_OUTPUT, MII_WRITE_OP(port, reg, data));
373         err = mdio_wait(np);
374         if (err < 0)
375                 return err;
376
377         return 0;
378 }
379
380 static int esr2_set_tx_cfg(struct niu *np, unsigned long channel, u32 val)
381 {
382         int err;
383
384         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
385                          ESR2_TI_PLL_TX_CFG_L(channel),
386                          val & 0xffff);
387         if (!err)
388                 err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
389                                  ESR2_TI_PLL_TX_CFG_H(channel),
390                                  val >> 16);
391         return err;
392 }
393
394 static int esr2_set_rx_cfg(struct niu *np, unsigned long channel, u32 val)
395 {
396         int err;
397
398         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
399                          ESR2_TI_PLL_RX_CFG_L(channel),
400                          val & 0xffff);
401         if (!err)
402                 err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
403                                  ESR2_TI_PLL_RX_CFG_H(channel),
404                                  val >> 16);
405         return err;
406 }
407
408 /* Mode is always 10G fiber.  */
409 static int serdes_init_niu_10g_fiber(struct niu *np)
410 {
411         struct niu_link_config *lp = &np->link_config;
412         u32 tx_cfg, rx_cfg;
413         unsigned long i;
414
415         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV);
416         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
417                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
418                   PLL_RX_CFG_EQ_LP_ADAPTIVE);
419
420         if (lp->loopback_mode == LOOPBACK_PHY) {
421                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
422
423                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
424                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
425
426                 tx_cfg |= PLL_TX_CFG_ENTEST;
427                 rx_cfg |= PLL_RX_CFG_ENTEST;
428         }
429
430         /* Initialize all 4 lanes of the SERDES.  */
431         for (i = 0; i < 4; i++) {
432                 int err = esr2_set_tx_cfg(np, i, tx_cfg);
433                 if (err)
434                         return err;
435         }
436
437         for (i = 0; i < 4; i++) {
438                 int err = esr2_set_rx_cfg(np, i, rx_cfg);
439                 if (err)
440                         return err;
441         }
442
443         return 0;
444 }
445
446 static int serdes_init_niu_1g_serdes(struct niu *np)
447 {
448         struct niu_link_config *lp = &np->link_config;
449         u16 pll_cfg, pll_sts;
450         int max_retry = 100;
451         u64 sig, mask, val;
452         u32 tx_cfg, rx_cfg;
453         unsigned long i;
454         int err;
455
456         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV |
457                   PLL_TX_CFG_RATE_HALF);
458         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
459                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
460                   PLL_RX_CFG_RATE_HALF);
461
462         if (np->port == 0)
463                 rx_cfg |= PLL_RX_CFG_EQ_LP_ADAPTIVE;
464
465         if (lp->loopback_mode == LOOPBACK_PHY) {
466                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
467
468                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
469                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
470
471                 tx_cfg |= PLL_TX_CFG_ENTEST;
472                 rx_cfg |= PLL_RX_CFG_ENTEST;
473         }
474
475         /* Initialize PLL for 1G */
476         pll_cfg = (PLL_CFG_ENPLL | PLL_CFG_MPY_8X);
477
478         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
479                          ESR2_TI_PLL_CFG_L, pll_cfg);
480         if (err) {
481                 dev_err(np->device, PFX "NIU Port %d "
482                         "serdes_init_niu_1g_serdes: "
483                         "mdio write to ESR2_TI_PLL_CFG_L failed", np->port);
484                 return err;
485         }
486
487         pll_sts = PLL_CFG_ENPLL;
488
489         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
490                          ESR2_TI_PLL_STS_L, pll_sts);
491         if (err) {
492                 dev_err(np->device, PFX "NIU Port %d "
493                         "serdes_init_niu_1g_serdes: "
494                         "mdio write to ESR2_TI_PLL_STS_L failed", np->port);
495                 return err;
496         }
497
498         udelay(200);
499
500         /* Initialize all 4 lanes of the SERDES.  */
501         for (i = 0; i < 4; i++) {
502                 err = esr2_set_tx_cfg(np, i, tx_cfg);
503                 if (err)
504                         return err;
505         }
506
507         for (i = 0; i < 4; i++) {
508                 err = esr2_set_rx_cfg(np, i, rx_cfg);
509                 if (err)
510                         return err;
511         }
512
513         switch (np->port) {
514         case 0:
515                 val = (ESR_INT_SRDY0_P0 | ESR_INT_DET0_P0);
516                 mask = val;
517                 break;
518
519         case 1:
520                 val = (ESR_INT_SRDY0_P1 | ESR_INT_DET0_P1);
521                 mask = val;
522                 break;
523
524         default:
525                 return -EINVAL;
526         }
527
528         while (max_retry--) {
529                 sig = nr64(ESR_INT_SIGNALS);
530                 if ((sig & mask) == val)
531                         break;
532
533                 mdelay(500);
534         }
535
536         if ((sig & mask) != val) {
537                 dev_err(np->device, PFX "Port %u signal bits [%08x] are not "
538                         "[%08x]\n", np->port, (int) (sig & mask), (int) val);
539                 return -ENODEV;
540         }
541
542         return 0;
543 }
544
545 static int serdes_init_niu_10g_serdes(struct niu *np)
546 {
547         struct niu_link_config *lp = &np->link_config;
548         u32 tx_cfg, rx_cfg, pll_cfg, pll_sts;
549         int max_retry = 100;
550         u64 sig, mask, val;
551         unsigned long i;
552         int err;
553
554         tx_cfg = (PLL_TX_CFG_ENTX | PLL_TX_CFG_SWING_1375MV);
555         rx_cfg = (PLL_RX_CFG_ENRX | PLL_RX_CFG_TERM_0P8VDDT |
556                   PLL_RX_CFG_ALIGN_ENA | PLL_RX_CFG_LOS_LTHRESH |
557                   PLL_RX_CFG_EQ_LP_ADAPTIVE);
558
559         if (lp->loopback_mode == LOOPBACK_PHY) {
560                 u16 test_cfg = PLL_TEST_CFG_LOOPBACK_CML_DIS;
561
562                 mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
563                            ESR2_TI_PLL_TEST_CFG_L, test_cfg);
564
565                 tx_cfg |= PLL_TX_CFG_ENTEST;
566                 rx_cfg |= PLL_RX_CFG_ENTEST;
567         }
568
569         /* Initialize PLL for 10G */
570         pll_cfg = (PLL_CFG_ENPLL | PLL_CFG_MPY_10X);
571
572         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
573                          ESR2_TI_PLL_CFG_L, pll_cfg & 0xffff);
574         if (err) {
575                 dev_err(np->device, PFX "NIU Port %d "
576                         "serdes_init_niu_10g_serdes: "
577                         "mdio write to ESR2_TI_PLL_CFG_L failed", np->port);
578                 return err;
579         }
580
581         pll_sts = PLL_CFG_ENPLL;
582
583         err = mdio_write(np, np->port, NIU_ESR2_DEV_ADDR,
584                          ESR2_TI_PLL_STS_L, pll_sts & 0xffff);
585         if (err) {
586                 dev_err(np->device, PFX "NIU Port %d "
587                         "serdes_init_niu_10g_serdes: "
588                         "mdio write to ESR2_TI_PLL_STS_L failed", np->port);
589                 return err;
590         }
591
592         udelay(200);
593
594         /* Initialize all 4 lanes of the SERDES.  */
595         for (i = 0; i < 4; i++) {
596                 err = esr2_set_tx_cfg(np, i, tx_cfg);
597                 if (err)
598                         return err;
599         }
600
601         for (i = 0; i < 4; i++) {
602                 err = esr2_set_rx_cfg(np, i, rx_cfg);
603                 if (err)
604                         return err;
605         }
606
607         /* check if serdes is ready */
608
609         switch (np->port) {
610         case 0:
611                 mask = ESR_INT_SIGNALS_P0_BITS;
612                 val = (ESR_INT_SRDY0_P0 |
613                        ESR_INT_DET0_P0 |
614                        ESR_INT_XSRDY_P0 |
615                        ESR_INT_XDP_P0_CH3 |
616                        ESR_INT_XDP_P0_CH2 |
617                        ESR_INT_XDP_P0_CH1 |
618                        ESR_INT_XDP_P0_CH0);
619                 break;
620
621         case 1:
622                 mask = ESR_INT_SIGNALS_P1_BITS;
623                 val = (ESR_INT_SRDY0_P1 |
624                        ESR_INT_DET0_P1 |
625                        ESR_INT_XSRDY_P1 |
626                        ESR_INT_XDP_P1_CH3 |
627                        ESR_INT_XDP_P1_CH2 |
628                        ESR_INT_XDP_P1_CH1 |
629                        ESR_INT_XDP_P1_CH0);
630                 break;
631
632         default:
633                 return -EINVAL;
634         }
635
636         while (max_retry--) {
637                 sig = nr64(ESR_INT_SIGNALS);
638                 if ((sig & mask) == val)
639                         break;
640
641                 mdelay(500);
642         }
643
644         if ((sig & mask) != val) {
645                 pr_info(PFX "NIU Port %u signal bits [%08x] are not "
646                         "[%08x] for 10G...trying 1G\n",
647                         np->port, (int) (sig & mask), (int) val);
648
649                 /* 10G failed, try initializing at 1G */
650                 err = serdes_init_niu_1g_serdes(np);
651                 if (!err) {
652                         np->flags &= ~NIU_FLAGS_10G;
653                         np->mac_xcvr = MAC_XCVR_PCS;
654                 }  else {
655                         dev_err(np->device, PFX "Port %u 10G/1G SERDES "
656                                 "Link Failed \n", np->port);
657                         return -ENODEV;
658                 }
659         }
660         return 0;
661 }
662
663 static int esr_read_rxtx_ctrl(struct niu *np, unsigned long chan, u32 *val)
664 {
665         int err;
666
667         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR, ESR_RXTX_CTRL_L(chan));
668         if (err >= 0) {
669                 *val = (err & 0xffff);
670                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
671                                 ESR_RXTX_CTRL_H(chan));
672                 if (err >= 0)
673                         *val |= ((err & 0xffff) << 16);
674                 err = 0;
675         }
676         return err;
677 }
678
679 static int esr_read_glue0(struct niu *np, unsigned long chan, u32 *val)
680 {
681         int err;
682
683         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
684                         ESR_GLUE_CTRL0_L(chan));
685         if (err >= 0) {
686                 *val = (err & 0xffff);
687                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
688                                 ESR_GLUE_CTRL0_H(chan));
689                 if (err >= 0) {
690                         *val |= ((err & 0xffff) << 16);
691                         err = 0;
692                 }
693         }
694         return err;
695 }
696
697 static int esr_read_reset(struct niu *np, u32 *val)
698 {
699         int err;
700
701         err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
702                         ESR_RXTX_RESET_CTRL_L);
703         if (err >= 0) {
704                 *val = (err & 0xffff);
705                 err = mdio_read(np, np->port, NIU_ESR_DEV_ADDR,
706                                 ESR_RXTX_RESET_CTRL_H);
707                 if (err >= 0) {
708                         *val |= ((err & 0xffff) << 16);
709                         err = 0;
710                 }
711         }
712         return err;
713 }
714
715 static int esr_write_rxtx_ctrl(struct niu *np, unsigned long chan, u32 val)
716 {
717         int err;
718
719         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
720                          ESR_RXTX_CTRL_L(chan), val & 0xffff);
721         if (!err)
722                 err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
723                                  ESR_RXTX_CTRL_H(chan), (val >> 16));
724         return err;
725 }
726
727 static int esr_write_glue0(struct niu *np, unsigned long chan, u32 val)
728 {
729         int err;
730
731         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
732                         ESR_GLUE_CTRL0_L(chan), val & 0xffff);
733         if (!err)
734                 err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
735                                  ESR_GLUE_CTRL0_H(chan), (val >> 16));
736         return err;
737 }
738
739 static int esr_reset(struct niu *np)
740 {
741         u32 reset;
742         int err;
743
744         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
745                          ESR_RXTX_RESET_CTRL_L, 0x0000);
746         if (err)
747                 return err;
748         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
749                          ESR_RXTX_RESET_CTRL_H, 0xffff);
750         if (err)
751                 return err;
752         udelay(200);
753
754         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
755                          ESR_RXTX_RESET_CTRL_L, 0xffff);
756         if (err)
757                 return err;
758         udelay(200);
759
760         err = mdio_write(np, np->port, NIU_ESR_DEV_ADDR,
761                          ESR_RXTX_RESET_CTRL_H, 0x0000);
762         if (err)
763                 return err;
764         udelay(200);
765
766         err = esr_read_reset(np, &reset);
767         if (err)
768                 return err;
769         if (reset != 0) {
770                 dev_err(np->device, PFX "Port %u ESR_RESET "
771                         "did not clear [%08x]\n",
772                         np->port, reset);
773                 return -ENODEV;
774         }
775
776         return 0;
777 }
778
779 static int serdes_init_10g(struct niu *np)
780 {
781         struct niu_link_config *lp = &np->link_config;
782         unsigned long ctrl_reg, test_cfg_reg, i;
783         u64 ctrl_val, test_cfg_val, sig, mask, val;
784         int err;
785
786         switch (np->port) {
787         case 0:
788                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
789                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
790                 break;
791         case 1:
792                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
793                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
794                 break;
795
796         default:
797                 return -EINVAL;
798         }
799         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
800                     ENET_SERDES_CTRL_SDET_1 |
801                     ENET_SERDES_CTRL_SDET_2 |
802                     ENET_SERDES_CTRL_SDET_3 |
803                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
804                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
805                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
806                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
807                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
808                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
809                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
810                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
811         test_cfg_val = 0;
812
813         if (lp->loopback_mode == LOOPBACK_PHY) {
814                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
815                                   ENET_SERDES_TEST_MD_0_SHIFT) |
816                                  (ENET_TEST_MD_PAD_LOOPBACK <<
817                                   ENET_SERDES_TEST_MD_1_SHIFT) |
818                                  (ENET_TEST_MD_PAD_LOOPBACK <<
819                                   ENET_SERDES_TEST_MD_2_SHIFT) |
820                                  (ENET_TEST_MD_PAD_LOOPBACK <<
821                                   ENET_SERDES_TEST_MD_3_SHIFT));
822         }
823
824         nw64(ctrl_reg, ctrl_val);
825         nw64(test_cfg_reg, test_cfg_val);
826
827         /* Initialize all 4 lanes of the SERDES.  */
828         for (i = 0; i < 4; i++) {
829                 u32 rxtx_ctrl, glue0;
830
831                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
832                 if (err)
833                         return err;
834                 err = esr_read_glue0(np, i, &glue0);
835                 if (err)
836                         return err;
837
838                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
839                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
840                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
841
842                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
843                            ESR_GLUE_CTRL0_THCNT |
844                            ESR_GLUE_CTRL0_BLTIME);
845                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
846                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
847                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
848                           (BLTIME_300_CYCLES <<
849                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
850
851                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
852                 if (err)
853                         return err;
854                 err = esr_write_glue0(np, i, glue0);
855                 if (err)
856                         return err;
857         }
858
859         err = esr_reset(np);
860         if (err)
861                 return err;
862
863         sig = nr64(ESR_INT_SIGNALS);
864         switch (np->port) {
865         case 0:
866                 mask = ESR_INT_SIGNALS_P0_BITS;
867                 val = (ESR_INT_SRDY0_P0 |
868                        ESR_INT_DET0_P0 |
869                        ESR_INT_XSRDY_P0 |
870                        ESR_INT_XDP_P0_CH3 |
871                        ESR_INT_XDP_P0_CH2 |
872                        ESR_INT_XDP_P0_CH1 |
873                        ESR_INT_XDP_P0_CH0);
874                 break;
875
876         case 1:
877                 mask = ESR_INT_SIGNALS_P1_BITS;
878                 val = (ESR_INT_SRDY0_P1 |
879                        ESR_INT_DET0_P1 |
880                        ESR_INT_XSRDY_P1 |
881                        ESR_INT_XDP_P1_CH3 |
882                        ESR_INT_XDP_P1_CH2 |
883                        ESR_INT_XDP_P1_CH1 |
884                        ESR_INT_XDP_P1_CH0);
885                 break;
886
887         default:
888                 return -EINVAL;
889         }
890
891         if ((sig & mask) != val) {
892                 if (np->flags & NIU_FLAGS_HOTPLUG_PHY) {
893                         np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
894                         return 0;
895                 }
896                 dev_err(np->device, PFX "Port %u signal bits [%08x] are not "
897                         "[%08x]\n", np->port, (int) (sig & mask), (int) val);
898                 return -ENODEV;
899         }
900         if (np->flags & NIU_FLAGS_HOTPLUG_PHY)
901                 np->flags |= NIU_FLAGS_HOTPLUG_PHY_PRESENT;
902         return 0;
903 }
904
905 static int serdes_init_1g(struct niu *np)
906 {
907         u64 val;
908
909         val = nr64(ENET_SERDES_1_PLL_CFG);
910         val &= ~ENET_SERDES_PLL_FBDIV2;
911         switch (np->port) {
912         case 0:
913                 val |= ENET_SERDES_PLL_HRATE0;
914                 break;
915         case 1:
916                 val |= ENET_SERDES_PLL_HRATE1;
917                 break;
918         case 2:
919                 val |= ENET_SERDES_PLL_HRATE2;
920                 break;
921         case 3:
922                 val |= ENET_SERDES_PLL_HRATE3;
923                 break;
924         default:
925                 return -EINVAL;
926         }
927         nw64(ENET_SERDES_1_PLL_CFG, val);
928
929         return 0;
930 }
931
932 static int serdes_init_1g_serdes(struct niu *np)
933 {
934         struct niu_link_config *lp = &np->link_config;
935         unsigned long ctrl_reg, test_cfg_reg, pll_cfg, i;
936         u64 ctrl_val, test_cfg_val, sig, mask, val;
937         int err;
938         u64 reset_val, val_rd;
939
940         val = ENET_SERDES_PLL_HRATE0 | ENET_SERDES_PLL_HRATE1 |
941                 ENET_SERDES_PLL_HRATE2 | ENET_SERDES_PLL_HRATE3 |
942                 ENET_SERDES_PLL_FBDIV0;
943         switch (np->port) {
944         case 0:
945                 reset_val =  ENET_SERDES_RESET_0;
946                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
947                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
948                 pll_cfg = ENET_SERDES_0_PLL_CFG;
949                 break;
950         case 1:
951                 reset_val =  ENET_SERDES_RESET_1;
952                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
953                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
954                 pll_cfg = ENET_SERDES_1_PLL_CFG;
955                 break;
956
957         default:
958                 return -EINVAL;
959         }
960         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
961                     ENET_SERDES_CTRL_SDET_1 |
962                     ENET_SERDES_CTRL_SDET_2 |
963                     ENET_SERDES_CTRL_SDET_3 |
964                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
965                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
966                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
967                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
968                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
969                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
970                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
971                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
972         test_cfg_val = 0;
973
974         if (lp->loopback_mode == LOOPBACK_PHY) {
975                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
976                                   ENET_SERDES_TEST_MD_0_SHIFT) |
977                                  (ENET_TEST_MD_PAD_LOOPBACK <<
978                                   ENET_SERDES_TEST_MD_1_SHIFT) |
979                                  (ENET_TEST_MD_PAD_LOOPBACK <<
980                                   ENET_SERDES_TEST_MD_2_SHIFT) |
981                                  (ENET_TEST_MD_PAD_LOOPBACK <<
982                                   ENET_SERDES_TEST_MD_3_SHIFT));
983         }
984
985         nw64(ENET_SERDES_RESET, reset_val);
986         mdelay(20);
987         val_rd = nr64(ENET_SERDES_RESET);
988         val_rd &= ~reset_val;
989         nw64(pll_cfg, val);
990         nw64(ctrl_reg, ctrl_val);
991         nw64(test_cfg_reg, test_cfg_val);
992         nw64(ENET_SERDES_RESET, val_rd);
993         mdelay(2000);
994
995         /* Initialize all 4 lanes of the SERDES.  */
996         for (i = 0; i < 4; i++) {
997                 u32 rxtx_ctrl, glue0;
998
999                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
1000                 if (err)
1001                         return err;
1002                 err = esr_read_glue0(np, i, &glue0);
1003                 if (err)
1004                         return err;
1005
1006                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
1007                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
1008                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
1009
1010                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
1011                            ESR_GLUE_CTRL0_THCNT |
1012                            ESR_GLUE_CTRL0_BLTIME);
1013                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
1014                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
1015                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
1016                           (BLTIME_300_CYCLES <<
1017                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
1018
1019                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
1020                 if (err)
1021                         return err;
1022                 err = esr_write_glue0(np, i, glue0);
1023                 if (err)
1024                         return err;
1025         }
1026
1027
1028         sig = nr64(ESR_INT_SIGNALS);
1029         switch (np->port) {
1030         case 0:
1031                 val = (ESR_INT_SRDY0_P0 | ESR_INT_DET0_P0);
1032                 mask = val;
1033                 break;
1034
1035         case 1:
1036                 val = (ESR_INT_SRDY0_P1 | ESR_INT_DET0_P1);
1037                 mask = val;
1038                 break;
1039
1040         default:
1041                 return -EINVAL;
1042         }
1043
1044         if ((sig & mask) != val) {
1045                 dev_err(np->device, PFX "Port %u signal bits [%08x] are not "
1046                         "[%08x]\n", np->port, (int) (sig & mask), (int) val);
1047                 return -ENODEV;
1048         }
1049
1050         return 0;
1051 }
1052
1053 static int link_status_1g_serdes(struct niu *np, int *link_up_p)
1054 {
1055         struct niu_link_config *lp = &np->link_config;
1056         int link_up;
1057         u64 val;
1058         u16 current_speed;
1059         unsigned long flags;
1060         u8 current_duplex;
1061
1062         link_up = 0;
1063         current_speed = SPEED_INVALID;
1064         current_duplex = DUPLEX_INVALID;
1065
1066         spin_lock_irqsave(&np->lock, flags);
1067
1068         val = nr64_pcs(PCS_MII_STAT);
1069
1070         if (val & PCS_MII_STAT_LINK_STATUS) {
1071                 link_up = 1;
1072                 current_speed = SPEED_1000;
1073                 current_duplex = DUPLEX_FULL;
1074         }
1075
1076         lp->active_speed = current_speed;
1077         lp->active_duplex = current_duplex;
1078         spin_unlock_irqrestore(&np->lock, flags);
1079
1080         *link_up_p = link_up;
1081         return 0;
1082 }
1083
1084 static int link_status_10g_serdes(struct niu *np, int *link_up_p)
1085 {
1086         unsigned long flags;
1087         struct niu_link_config *lp = &np->link_config;
1088         int link_up = 0;
1089         int link_ok = 1;
1090         u64 val, val2;
1091         u16 current_speed;
1092         u8 current_duplex;
1093
1094         if (!(np->flags & NIU_FLAGS_10G))
1095                 return link_status_1g_serdes(np, link_up_p);
1096
1097         current_speed = SPEED_INVALID;
1098         current_duplex = DUPLEX_INVALID;
1099         spin_lock_irqsave(&np->lock, flags);
1100
1101         val = nr64_xpcs(XPCS_STATUS(0));
1102         val2 = nr64_mac(XMAC_INTER2);
1103         if (val2 & 0x01000000)
1104                 link_ok = 0;
1105
1106         if ((val & 0x1000ULL) && link_ok) {
1107                 link_up = 1;
1108                 current_speed = SPEED_10000;
1109                 current_duplex = DUPLEX_FULL;
1110         }
1111         lp->active_speed = current_speed;
1112         lp->active_duplex = current_duplex;
1113         spin_unlock_irqrestore(&np->lock, flags);
1114         *link_up_p = link_up;
1115         return 0;
1116 }
1117
1118 static int link_status_1g_rgmii(struct niu *np, int *link_up_p)
1119 {
1120         struct niu_link_config *lp = &np->link_config;
1121         u16 current_speed, bmsr;
1122         unsigned long flags;
1123         u8 current_duplex;
1124         int err, link_up;
1125
1126         link_up = 0;
1127         current_speed = SPEED_INVALID;
1128         current_duplex = DUPLEX_INVALID;
1129
1130         spin_lock_irqsave(&np->lock, flags);
1131
1132         err = -EINVAL;
1133
1134         err = mii_read(np, np->phy_addr, MII_BMSR);
1135         if (err < 0)
1136                 goto out;
1137
1138         bmsr = err;
1139         if (bmsr & BMSR_LSTATUS) {
1140                 u16 adv, lpa, common, estat;
1141
1142                 err = mii_read(np, np->phy_addr, MII_ADVERTISE);
1143                 if (err < 0)
1144                         goto out;
1145                 adv = err;
1146
1147                 err = mii_read(np, np->phy_addr, MII_LPA);
1148                 if (err < 0)
1149                         goto out;
1150                 lpa = err;
1151
1152                 common = adv & lpa;
1153
1154                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1155                 if (err < 0)
1156                         goto out;
1157                 estat = err;
1158                 link_up = 1;
1159                 current_speed = SPEED_1000;
1160                 current_duplex = DUPLEX_FULL;
1161
1162         }
1163         lp->active_speed = current_speed;
1164         lp->active_duplex = current_duplex;
1165         err = 0;
1166
1167 out:
1168         spin_unlock_irqrestore(&np->lock, flags);
1169
1170         *link_up_p = link_up;
1171         return err;
1172 }
1173
1174 static int bcm8704_reset(struct niu *np)
1175 {
1176         int err, limit;
1177
1178         err = mdio_read(np, np->phy_addr,
1179                         BCM8704_PHYXS_DEV_ADDR, MII_BMCR);
1180         if (err < 0)
1181                 return err;
1182         err |= BMCR_RESET;
1183         err = mdio_write(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1184                          MII_BMCR, err);
1185         if (err)
1186                 return err;
1187
1188         limit = 1000;
1189         while (--limit >= 0) {
1190                 err = mdio_read(np, np->phy_addr,
1191                                 BCM8704_PHYXS_DEV_ADDR, MII_BMCR);
1192                 if (err < 0)
1193                         return err;
1194                 if (!(err & BMCR_RESET))
1195                         break;
1196         }
1197         if (limit < 0) {
1198                 dev_err(np->device, PFX "Port %u PHY will not reset "
1199                         "(bmcr=%04x)\n", np->port, (err & 0xffff));
1200                 return -ENODEV;
1201         }
1202         return 0;
1203 }
1204
1205 /* When written, certain PHY registers need to be read back twice
1206  * in order for the bits to settle properly.
1207  */
1208 static int bcm8704_user_dev3_readback(struct niu *np, int reg)
1209 {
1210         int err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, reg);
1211         if (err < 0)
1212                 return err;
1213         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, reg);
1214         if (err < 0)
1215                 return err;
1216         return 0;
1217 }
1218
1219 static int bcm8706_init_user_dev3(struct niu *np)
1220 {
1221         int err;
1222
1223
1224         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1225                         BCM8704_USER_OPT_DIGITAL_CTRL);
1226         if (err < 0)
1227                 return err;
1228         err &= ~USER_ODIG_CTRL_GPIOS;
1229         err |= (0x3 << USER_ODIG_CTRL_GPIOS_SHIFT);
1230         err |=  USER_ODIG_CTRL_RESV2;
1231         err = mdio_write(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1232                          BCM8704_USER_OPT_DIGITAL_CTRL, err);
1233         if (err)
1234                 return err;
1235
1236         mdelay(1000);
1237
1238         return 0;
1239 }
1240
1241 static int bcm8704_init_user_dev3(struct niu *np)
1242 {
1243         int err;
1244
1245         err = mdio_write(np, np->phy_addr,
1246                          BCM8704_USER_DEV3_ADDR, BCM8704_USER_CONTROL,
1247                          (USER_CONTROL_OPTXRST_LVL |
1248                           USER_CONTROL_OPBIASFLT_LVL |
1249                           USER_CONTROL_OBTMPFLT_LVL |
1250                           USER_CONTROL_OPPRFLT_LVL |
1251                           USER_CONTROL_OPTXFLT_LVL |
1252                           USER_CONTROL_OPRXLOS_LVL |
1253                           USER_CONTROL_OPRXFLT_LVL |
1254                           USER_CONTROL_OPTXON_LVL |
1255                           (0x3f << USER_CONTROL_RES1_SHIFT)));
1256         if (err)
1257                 return err;
1258
1259         err = mdio_write(np, np->phy_addr,
1260                          BCM8704_USER_DEV3_ADDR, BCM8704_USER_PMD_TX_CONTROL,
1261                          (USER_PMD_TX_CTL_XFP_CLKEN |
1262                           (1 << USER_PMD_TX_CTL_TX_DAC_TXD_SH) |
1263                           (2 << USER_PMD_TX_CTL_TX_DAC_TXCK_SH) |
1264                           USER_PMD_TX_CTL_TSCK_LPWREN));
1265         if (err)
1266                 return err;
1267
1268         err = bcm8704_user_dev3_readback(np, BCM8704_USER_CONTROL);
1269         if (err)
1270                 return err;
1271         err = bcm8704_user_dev3_readback(np, BCM8704_USER_PMD_TX_CONTROL);
1272         if (err)
1273                 return err;
1274
1275         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1276                         BCM8704_USER_OPT_DIGITAL_CTRL);
1277         if (err < 0)
1278                 return err;
1279         err &= ~USER_ODIG_CTRL_GPIOS;
1280         err |= (0x3 << USER_ODIG_CTRL_GPIOS_SHIFT);
1281         err = mdio_write(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1282                          BCM8704_USER_OPT_DIGITAL_CTRL, err);
1283         if (err)
1284                 return err;
1285
1286         mdelay(1000);
1287
1288         return 0;
1289 }
1290
1291 static int mrvl88x2011_act_led(struct niu *np, int val)
1292 {
1293         int     err;
1294
1295         err  = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1296                 MRVL88X2011_LED_8_TO_11_CTL);
1297         if (err < 0)
1298                 return err;
1299
1300         err &= ~MRVL88X2011_LED(MRVL88X2011_LED_ACT,MRVL88X2011_LED_CTL_MASK);
1301         err |=  MRVL88X2011_LED(MRVL88X2011_LED_ACT,val);
1302
1303         return mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1304                           MRVL88X2011_LED_8_TO_11_CTL, err);
1305 }
1306
1307 static int mrvl88x2011_led_blink_rate(struct niu *np, int rate)
1308 {
1309         int     err;
1310
1311         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1312                         MRVL88X2011_LED_BLINK_CTL);
1313         if (err >= 0) {
1314                 err &= ~MRVL88X2011_LED_BLKRATE_MASK;
1315                 err |= (rate << 4);
1316
1317                 err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV2_ADDR,
1318                                  MRVL88X2011_LED_BLINK_CTL, err);
1319         }
1320
1321         return err;
1322 }
1323
1324 static int xcvr_init_10g_mrvl88x2011(struct niu *np)
1325 {
1326         int     err;
1327
1328         /* Set LED functions */
1329         err = mrvl88x2011_led_blink_rate(np, MRVL88X2011_LED_BLKRATE_134MS);
1330         if (err)
1331                 return err;
1332
1333         /* led activity */
1334         err = mrvl88x2011_act_led(np, MRVL88X2011_LED_CTL_OFF);
1335         if (err)
1336                 return err;
1337
1338         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1339                         MRVL88X2011_GENERAL_CTL);
1340         if (err < 0)
1341                 return err;
1342
1343         err |= MRVL88X2011_ENA_XFPREFCLK;
1344
1345         err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1346                          MRVL88X2011_GENERAL_CTL, err);
1347         if (err < 0)
1348                 return err;
1349
1350         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1351                         MRVL88X2011_PMA_PMD_CTL_1);
1352         if (err < 0)
1353                 return err;
1354
1355         if (np->link_config.loopback_mode == LOOPBACK_MAC)
1356                 err |= MRVL88X2011_LOOPBACK;
1357         else
1358                 err &= ~MRVL88X2011_LOOPBACK;
1359
1360         err = mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1361                          MRVL88X2011_PMA_PMD_CTL_1, err);
1362         if (err < 0)
1363                 return err;
1364
1365         /* Enable PMD  */
1366         return mdio_write(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1367                           MRVL88X2011_10G_PMD_TX_DIS, MRVL88X2011_ENA_PMDTX);
1368 }
1369
1370
1371 static int xcvr_diag_bcm870x(struct niu *np)
1372 {
1373         u16 analog_stat0, tx_alarm_status;
1374         int err = 0;
1375
1376 #if 1
1377         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
1378                         MII_STAT1000);
1379         if (err < 0)
1380                 return err;
1381         pr_info(PFX "Port %u PMA_PMD(MII_STAT1000) [%04x]\n",
1382                 np->port, err);
1383
1384         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR, 0x20);
1385         if (err < 0)
1386                 return err;
1387         pr_info(PFX "Port %u USER_DEV3(0x20) [%04x]\n",
1388                 np->port, err);
1389
1390         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1391                         MII_NWAYTEST);
1392         if (err < 0)
1393                 return err;
1394         pr_info(PFX "Port %u PHYXS(MII_NWAYTEST) [%04x]\n",
1395                 np->port, err);
1396 #endif
1397
1398         /* XXX dig this out it might not be so useful XXX */
1399         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1400                         BCM8704_USER_ANALOG_STATUS0);
1401         if (err < 0)
1402                 return err;
1403         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1404                         BCM8704_USER_ANALOG_STATUS0);
1405         if (err < 0)
1406                 return err;
1407         analog_stat0 = err;
1408
1409         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1410                         BCM8704_USER_TX_ALARM_STATUS);
1411         if (err < 0)
1412                 return err;
1413         err = mdio_read(np, np->phy_addr, BCM8704_USER_DEV3_ADDR,
1414                         BCM8704_USER_TX_ALARM_STATUS);
1415         if (err < 0)
1416                 return err;
1417         tx_alarm_status = err;
1418
1419         if (analog_stat0 != 0x03fc) {
1420                 if ((analog_stat0 == 0x43bc) && (tx_alarm_status != 0)) {
1421                         pr_info(PFX "Port %u cable not connected "
1422                                 "or bad cable.\n", np->port);
1423                 } else if (analog_stat0 == 0x639c) {
1424                         pr_info(PFX "Port %u optical module is bad "
1425                                 "or missing.\n", np->port);
1426                 }
1427         }
1428
1429         return 0;
1430 }
1431
1432 static int xcvr_10g_set_lb_bcm870x(struct niu *np)
1433 {
1434         struct niu_link_config *lp = &np->link_config;
1435         int err;
1436
1437         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1438                         MII_BMCR);
1439         if (err < 0)
1440                 return err;
1441
1442         err &= ~BMCR_LOOPBACK;
1443
1444         if (lp->loopback_mode == LOOPBACK_MAC)
1445                 err |= BMCR_LOOPBACK;
1446
1447         err = mdio_write(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1448                          MII_BMCR, err);
1449         if (err)
1450                 return err;
1451
1452         return 0;
1453 }
1454
1455 static int xcvr_init_10g_bcm8706(struct niu *np)
1456 {
1457         int err = 0;
1458         u64 val;
1459
1460         if ((np->flags & NIU_FLAGS_HOTPLUG_PHY) &&
1461             (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT) == 0)
1462                         return err;
1463
1464         val = nr64_mac(XMAC_CONFIG);
1465         val &= ~XMAC_CONFIG_LED_POLARITY;
1466         val |= XMAC_CONFIG_FORCE_LED_ON;
1467         nw64_mac(XMAC_CONFIG, val);
1468
1469         val = nr64(MIF_CONFIG);
1470         val |= MIF_CONFIG_INDIRECT_MODE;
1471         nw64(MIF_CONFIG, val);
1472
1473         err = bcm8704_reset(np);
1474         if (err)
1475                 return err;
1476
1477         err = xcvr_10g_set_lb_bcm870x(np);
1478         if (err)
1479                 return err;
1480
1481         err = bcm8706_init_user_dev3(np);
1482         if (err)
1483                 return err;
1484
1485         err = xcvr_diag_bcm870x(np);
1486         if (err)
1487                 return err;
1488
1489         return 0;
1490 }
1491
1492 static int xcvr_init_10g_bcm8704(struct niu *np)
1493 {
1494         int err;
1495
1496         err = bcm8704_reset(np);
1497         if (err)
1498                 return err;
1499
1500         err = bcm8704_init_user_dev3(np);
1501         if (err)
1502                 return err;
1503
1504         err = xcvr_10g_set_lb_bcm870x(np);
1505         if (err)
1506                 return err;
1507
1508         err =  xcvr_diag_bcm870x(np);
1509         if (err)
1510                 return err;
1511
1512         return 0;
1513 }
1514
1515 static int xcvr_init_10g(struct niu *np)
1516 {
1517         int phy_id, err;
1518         u64 val;
1519
1520         val = nr64_mac(XMAC_CONFIG);
1521         val &= ~XMAC_CONFIG_LED_POLARITY;
1522         val |= XMAC_CONFIG_FORCE_LED_ON;
1523         nw64_mac(XMAC_CONFIG, val);
1524
1525         /* XXX shared resource, lock parent XXX */
1526         val = nr64(MIF_CONFIG);
1527         val |= MIF_CONFIG_INDIRECT_MODE;
1528         nw64(MIF_CONFIG, val);
1529
1530         phy_id = phy_decode(np->parent->port_phy, np->port);
1531         phy_id = np->parent->phy_probe_info.phy_id[phy_id][np->port];
1532
1533         /* handle different phy types */
1534         switch (phy_id & NIU_PHY_ID_MASK) {
1535         case NIU_PHY_ID_MRVL88X2011:
1536                 err = xcvr_init_10g_mrvl88x2011(np);
1537                 break;
1538
1539         default: /* bcom 8704 */
1540                 err = xcvr_init_10g_bcm8704(np);
1541                 break;
1542         }
1543
1544         return 0;
1545 }
1546
1547 static int mii_reset(struct niu *np)
1548 {
1549         int limit, err;
1550
1551         err = mii_write(np, np->phy_addr, MII_BMCR, BMCR_RESET);
1552         if (err)
1553                 return err;
1554
1555         limit = 1000;
1556         while (--limit >= 0) {
1557                 udelay(500);
1558                 err = mii_read(np, np->phy_addr, MII_BMCR);
1559                 if (err < 0)
1560                         return err;
1561                 if (!(err & BMCR_RESET))
1562                         break;
1563         }
1564         if (limit < 0) {
1565                 dev_err(np->device, PFX "Port %u MII would not reset, "
1566                         "bmcr[%04x]\n", np->port, err);
1567                 return -ENODEV;
1568         }
1569
1570         return 0;
1571 }
1572
1573 static int xcvr_init_1g_rgmii(struct niu *np)
1574 {
1575         int err;
1576         u64 val;
1577         u16 bmcr, bmsr, estat;
1578
1579         val = nr64(MIF_CONFIG);
1580         val &= ~MIF_CONFIG_INDIRECT_MODE;
1581         nw64(MIF_CONFIG, val);
1582
1583         err = mii_reset(np);
1584         if (err)
1585                 return err;
1586
1587         err = mii_read(np, np->phy_addr, MII_BMSR);
1588         if (err < 0)
1589                 return err;
1590         bmsr = err;
1591
1592         estat = 0;
1593         if (bmsr & BMSR_ESTATEN) {
1594                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1595                 if (err < 0)
1596                         return err;
1597                 estat = err;
1598         }
1599
1600         bmcr = 0;
1601         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1602         if (err)
1603                 return err;
1604
1605         if (bmsr & BMSR_ESTATEN) {
1606                 u16 ctrl1000 = 0;
1607
1608                 if (estat & ESTATUS_1000_TFULL)
1609                         ctrl1000 |= ADVERTISE_1000FULL;
1610                 err = mii_write(np, np->phy_addr, MII_CTRL1000, ctrl1000);
1611                 if (err)
1612                         return err;
1613         }
1614
1615         bmcr = (BMCR_SPEED1000 | BMCR_FULLDPLX);
1616
1617         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1618         if (err)
1619                 return err;
1620
1621         err = mii_read(np, np->phy_addr, MII_BMCR);
1622         if (err < 0)
1623                 return err;
1624         bmcr = mii_read(np, np->phy_addr, MII_BMCR);
1625
1626         err = mii_read(np, np->phy_addr, MII_BMSR);
1627         if (err < 0)
1628                 return err;
1629
1630         return 0;
1631 }
1632
1633 static int mii_init_common(struct niu *np)
1634 {
1635         struct niu_link_config *lp = &np->link_config;
1636         u16 bmcr, bmsr, adv, estat;
1637         int err;
1638
1639         err = mii_reset(np);
1640         if (err)
1641                 return err;
1642
1643         err = mii_read(np, np->phy_addr, MII_BMSR);
1644         if (err < 0)
1645                 return err;
1646         bmsr = err;
1647
1648         estat = 0;
1649         if (bmsr & BMSR_ESTATEN) {
1650                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
1651                 if (err < 0)
1652                         return err;
1653                 estat = err;
1654         }
1655
1656         bmcr = 0;
1657         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1658         if (err)
1659                 return err;
1660
1661         if (lp->loopback_mode == LOOPBACK_MAC) {
1662                 bmcr |= BMCR_LOOPBACK;
1663                 if (lp->active_speed == SPEED_1000)
1664                         bmcr |= BMCR_SPEED1000;
1665                 if (lp->active_duplex == DUPLEX_FULL)
1666                         bmcr |= BMCR_FULLDPLX;
1667         }
1668
1669         if (lp->loopback_mode == LOOPBACK_PHY) {
1670                 u16 aux;
1671
1672                 aux = (BCM5464R_AUX_CTL_EXT_LB |
1673                        BCM5464R_AUX_CTL_WRITE_1);
1674                 err = mii_write(np, np->phy_addr, BCM5464R_AUX_CTL, aux);
1675                 if (err)
1676                         return err;
1677         }
1678
1679         /* XXX configurable XXX */
1680         /* XXX for now don't advertise half-duplex or asym pause... XXX */
1681         adv = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP;
1682         if (bmsr & BMSR_10FULL)
1683                 adv |= ADVERTISE_10FULL;
1684         if (bmsr & BMSR_100FULL)
1685                 adv |= ADVERTISE_100FULL;
1686         err = mii_write(np, np->phy_addr, MII_ADVERTISE, adv);
1687         if (err)
1688                 return err;
1689
1690         if (bmsr & BMSR_ESTATEN) {
1691                 u16 ctrl1000 = 0;
1692
1693                 if (estat & ESTATUS_1000_TFULL)
1694                         ctrl1000 |= ADVERTISE_1000FULL;
1695                 err = mii_write(np, np->phy_addr, MII_CTRL1000, ctrl1000);
1696                 if (err)
1697                         return err;
1698         }
1699         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1700
1701         err = mii_write(np, np->phy_addr, MII_BMCR, bmcr);
1702         if (err)
1703                 return err;
1704
1705         err = mii_read(np, np->phy_addr, MII_BMCR);
1706         if (err < 0)
1707                 return err;
1708         err = mii_read(np, np->phy_addr, MII_BMSR);
1709         if (err < 0)
1710                 return err;
1711 #if 0
1712         pr_info(PFX "Port %u after MII init bmcr[%04x] bmsr[%04x]\n",
1713                 np->port, bmcr, bmsr);
1714 #endif
1715
1716         return 0;
1717 }
1718
1719 static int xcvr_init_1g(struct niu *np)
1720 {
1721         u64 val;
1722
1723         /* XXX shared resource, lock parent XXX */
1724         val = nr64(MIF_CONFIG);
1725         val &= ~MIF_CONFIG_INDIRECT_MODE;
1726         nw64(MIF_CONFIG, val);
1727
1728         return mii_init_common(np);
1729 }
1730
1731 static int niu_xcvr_init(struct niu *np)
1732 {
1733         const struct niu_phy_ops *ops = np->phy_ops;
1734         int err;
1735
1736         err = 0;
1737         if (ops->xcvr_init)
1738                 err = ops->xcvr_init(np);
1739
1740         return err;
1741 }
1742
1743 static int niu_serdes_init(struct niu *np)
1744 {
1745         const struct niu_phy_ops *ops = np->phy_ops;
1746         int err;
1747
1748         err = 0;
1749         if (ops->serdes_init)
1750                 err = ops->serdes_init(np);
1751
1752         return err;
1753 }
1754
1755 static void niu_init_xif(struct niu *);
1756 static void niu_handle_led(struct niu *, int status);
1757
1758 static int niu_link_status_common(struct niu *np, int link_up)
1759 {
1760         struct niu_link_config *lp = &np->link_config;
1761         struct net_device *dev = np->dev;
1762         unsigned long flags;
1763
1764         if (!netif_carrier_ok(dev) && link_up) {
1765                 niuinfo(LINK, "%s: Link is up at %s, %s duplex\n",
1766                        dev->name,
1767                        (lp->active_speed == SPEED_10000 ?
1768                         "10Gb/sec" :
1769                         (lp->active_speed == SPEED_1000 ?
1770                          "1Gb/sec" :
1771                          (lp->active_speed == SPEED_100 ?
1772                           "100Mbit/sec" : "10Mbit/sec"))),
1773                        (lp->active_duplex == DUPLEX_FULL ?
1774                         "full" : "half"));
1775
1776                 spin_lock_irqsave(&np->lock, flags);
1777                 niu_init_xif(np);
1778                 niu_handle_led(np, 1);
1779                 spin_unlock_irqrestore(&np->lock, flags);
1780
1781                 netif_carrier_on(dev);
1782         } else if (netif_carrier_ok(dev) && !link_up) {
1783                 niuwarn(LINK, "%s: Link is down\n", dev->name);
1784                 spin_lock_irqsave(&np->lock, flags);
1785                 niu_handle_led(np, 0);
1786                 spin_unlock_irqrestore(&np->lock, flags);
1787                 netif_carrier_off(dev);
1788         }
1789
1790         return 0;
1791 }
1792
1793 static int link_status_10g_mrvl(struct niu *np, int *link_up_p)
1794 {
1795         int err, link_up, pma_status, pcs_status;
1796
1797         link_up = 0;
1798
1799         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1800                         MRVL88X2011_10G_PMD_STATUS_2);
1801         if (err < 0)
1802                 goto out;
1803
1804         /* Check PMA/PMD Register: 1.0001.2 == 1 */
1805         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV1_ADDR,
1806                         MRVL88X2011_PMA_PMD_STATUS_1);
1807         if (err < 0)
1808                 goto out;
1809
1810         pma_status = ((err & MRVL88X2011_LNK_STATUS_OK) ? 1 : 0);
1811
1812         /* Check PMC Register : 3.0001.2 == 1: read twice */
1813         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1814                         MRVL88X2011_PMA_PMD_STATUS_1);
1815         if (err < 0)
1816                 goto out;
1817
1818         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV3_ADDR,
1819                         MRVL88X2011_PMA_PMD_STATUS_1);
1820         if (err < 0)
1821                 goto out;
1822
1823         pcs_status = ((err & MRVL88X2011_LNK_STATUS_OK) ? 1 : 0);
1824
1825         /* Check XGXS Register : 4.0018.[0-3,12] */
1826         err = mdio_read(np, np->phy_addr, MRVL88X2011_USER_DEV4_ADDR,
1827                         MRVL88X2011_10G_XGXS_LANE_STAT);
1828         if (err < 0)
1829                 goto out;
1830
1831         if (err == (PHYXS_XGXS_LANE_STAT_ALINGED | PHYXS_XGXS_LANE_STAT_LANE3 |
1832                     PHYXS_XGXS_LANE_STAT_LANE2 | PHYXS_XGXS_LANE_STAT_LANE1 |
1833                     PHYXS_XGXS_LANE_STAT_LANE0 | PHYXS_XGXS_LANE_STAT_MAGIC |
1834                     0x800))
1835                 link_up = (pma_status && pcs_status) ? 1 : 0;
1836
1837         np->link_config.active_speed = SPEED_10000;
1838         np->link_config.active_duplex = DUPLEX_FULL;
1839         err = 0;
1840 out:
1841         mrvl88x2011_act_led(np, (link_up ?
1842                                  MRVL88X2011_LED_CTL_PCS_ACT :
1843                                  MRVL88X2011_LED_CTL_OFF));
1844
1845         *link_up_p = link_up;
1846         return err;
1847 }
1848
1849 static int link_status_10g_bcm8706(struct niu *np, int *link_up_p)
1850 {
1851         int err, link_up;
1852         link_up = 0;
1853
1854         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
1855                         BCM8704_PMD_RCV_SIGDET);
1856         if (err < 0)
1857                 goto out;
1858         if (!(err & PMD_RCV_SIGDET_GLOBAL)) {
1859                 err = 0;
1860                 goto out;
1861         }
1862
1863         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1864                         BCM8704_PCS_10G_R_STATUS);
1865         if (err < 0)
1866                 goto out;
1867
1868         if (!(err & PCS_10G_R_STATUS_BLK_LOCK)) {
1869                 err = 0;
1870                 goto out;
1871         }
1872
1873         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1874                         BCM8704_PHYXS_XGXS_LANE_STAT);
1875         if (err < 0)
1876                 goto out;
1877         if (err != (PHYXS_XGXS_LANE_STAT_ALINGED |
1878                     PHYXS_XGXS_LANE_STAT_MAGIC |
1879                     PHYXS_XGXS_LANE_STAT_PATTEST |
1880                     PHYXS_XGXS_LANE_STAT_LANE3 |
1881                     PHYXS_XGXS_LANE_STAT_LANE2 |
1882                     PHYXS_XGXS_LANE_STAT_LANE1 |
1883                     PHYXS_XGXS_LANE_STAT_LANE0)) {
1884                 err = 0;
1885                 np->link_config.active_speed = SPEED_INVALID;
1886                 np->link_config.active_duplex = DUPLEX_INVALID;
1887                 goto out;
1888         }
1889
1890         link_up = 1;
1891         np->link_config.active_speed = SPEED_10000;
1892         np->link_config.active_duplex = DUPLEX_FULL;
1893         err = 0;
1894
1895 out:
1896         *link_up_p = link_up;
1897         if (np->flags & NIU_FLAGS_HOTPLUG_PHY)
1898                 err = 0;
1899         return err;
1900 }
1901
1902 static int link_status_10g_bcom(struct niu *np, int *link_up_p)
1903 {
1904         int err, link_up;
1905
1906         link_up = 0;
1907
1908         err = mdio_read(np, np->phy_addr, BCM8704_PMA_PMD_DEV_ADDR,
1909                         BCM8704_PMD_RCV_SIGDET);
1910         if (err < 0)
1911                 goto out;
1912         if (!(err & PMD_RCV_SIGDET_GLOBAL)) {
1913                 err = 0;
1914                 goto out;
1915         }
1916
1917         err = mdio_read(np, np->phy_addr, BCM8704_PCS_DEV_ADDR,
1918                         BCM8704_PCS_10G_R_STATUS);
1919         if (err < 0)
1920                 goto out;
1921         if (!(err & PCS_10G_R_STATUS_BLK_LOCK)) {
1922                 err = 0;
1923                 goto out;
1924         }
1925
1926         err = mdio_read(np, np->phy_addr, BCM8704_PHYXS_DEV_ADDR,
1927                         BCM8704_PHYXS_XGXS_LANE_STAT);
1928         if (err < 0)
1929                 goto out;
1930
1931         if (err != (PHYXS_XGXS_LANE_STAT_ALINGED |
1932                     PHYXS_XGXS_LANE_STAT_MAGIC |
1933                     PHYXS_XGXS_LANE_STAT_LANE3 |
1934                     PHYXS_XGXS_LANE_STAT_LANE2 |
1935                     PHYXS_XGXS_LANE_STAT_LANE1 |
1936                     PHYXS_XGXS_LANE_STAT_LANE0)) {
1937                 err = 0;
1938                 goto out;
1939         }
1940
1941         link_up = 1;
1942         np->link_config.active_speed = SPEED_10000;
1943         np->link_config.active_duplex = DUPLEX_FULL;
1944         err = 0;
1945
1946 out:
1947         *link_up_p = link_up;
1948         return err;
1949 }
1950
1951 static int link_status_10g(struct niu *np, int *link_up_p)
1952 {
1953         unsigned long flags;
1954         int err = -EINVAL;
1955
1956         spin_lock_irqsave(&np->lock, flags);
1957
1958         if (np->link_config.loopback_mode == LOOPBACK_DISABLED) {
1959                 int phy_id;
1960
1961                 phy_id = phy_decode(np->parent->port_phy, np->port);
1962                 phy_id = np->parent->phy_probe_info.phy_id[phy_id][np->port];
1963
1964                 /* handle different phy types */
1965                 switch (phy_id & NIU_PHY_ID_MASK) {
1966                 case NIU_PHY_ID_MRVL88X2011:
1967                         err = link_status_10g_mrvl(np, link_up_p);
1968                         break;
1969
1970                 default: /* bcom 8704 */
1971                         err = link_status_10g_bcom(np, link_up_p);
1972                         break;
1973                 }
1974         }
1975
1976         spin_unlock_irqrestore(&np->lock, flags);
1977
1978         return err;
1979 }
1980
1981 static int niu_10g_phy_present(struct niu *np)
1982 {
1983         u64 sig, mask, val;
1984
1985         sig = nr64(ESR_INT_SIGNALS);
1986         switch (np->port) {
1987         case 0:
1988                 mask = ESR_INT_SIGNALS_P0_BITS;
1989                 val = (ESR_INT_SRDY0_P0 |
1990                        ESR_INT_DET0_P0 |
1991                        ESR_INT_XSRDY_P0 |
1992                        ESR_INT_XDP_P0_CH3 |
1993                        ESR_INT_XDP_P0_CH2 |
1994                        ESR_INT_XDP_P0_CH1 |
1995                        ESR_INT_XDP_P0_CH0);
1996                 break;
1997
1998         case 1:
1999                 mask = ESR_INT_SIGNALS_P1_BITS;
2000                 val = (ESR_INT_SRDY0_P1 |
2001                        ESR_INT_DET0_P1 |
2002                        ESR_INT_XSRDY_P1 |
2003                        ESR_INT_XDP_P1_CH3 |
2004                        ESR_INT_XDP_P1_CH2 |
2005                        ESR_INT_XDP_P1_CH1 |
2006                        ESR_INT_XDP_P1_CH0);
2007                 break;
2008
2009         default:
2010                 return 0;
2011         }
2012
2013         if ((sig & mask) != val)
2014                 return 0;
2015         return 1;
2016 }
2017
2018 static int link_status_10g_hotplug(struct niu *np, int *link_up_p)
2019 {
2020         unsigned long flags;
2021         int err = 0;
2022         int phy_present;
2023         int phy_present_prev;
2024
2025         spin_lock_irqsave(&np->lock, flags);
2026
2027         if (np->link_config.loopback_mode == LOOPBACK_DISABLED) {
2028                 phy_present_prev = (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT) ?
2029                         1 : 0;
2030                 phy_present = niu_10g_phy_present(np);
2031                 if (phy_present != phy_present_prev) {
2032                         /* state change */
2033                         if (phy_present) {
2034                                 np->flags |= NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2035                                 if (np->phy_ops->xcvr_init)
2036                                         err = np->phy_ops->xcvr_init(np);
2037                                 if (err) {
2038                                         /* debounce */
2039                                         np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2040                                 }
2041                         } else {
2042                                 np->flags &= ~NIU_FLAGS_HOTPLUG_PHY_PRESENT;
2043                                 *link_up_p = 0;
2044                                 niuwarn(LINK, "%s: Hotplug PHY Removed\n",
2045                                         np->dev->name);
2046                         }
2047                 }
2048                 if (np->flags & NIU_FLAGS_HOTPLUG_PHY_PRESENT)
2049                         err = link_status_10g_bcm8706(np, link_up_p);
2050         }
2051
2052         spin_unlock_irqrestore(&np->lock, flags);
2053
2054         return err;
2055 }
2056
2057 static int link_status_1g(struct niu *np, int *link_up_p)
2058 {
2059         struct niu_link_config *lp = &np->link_config;
2060         u16 current_speed, bmsr;
2061         unsigned long flags;
2062         u8 current_duplex;
2063         int err, link_up;
2064
2065         link_up = 0;
2066         current_speed = SPEED_INVALID;
2067         current_duplex = DUPLEX_INVALID;
2068
2069         spin_lock_irqsave(&np->lock, flags);
2070
2071         err = -EINVAL;
2072         if (np->link_config.loopback_mode != LOOPBACK_DISABLED)
2073                 goto out;
2074
2075         err = mii_read(np, np->phy_addr, MII_BMSR);
2076         if (err < 0)
2077                 goto out;
2078
2079         bmsr = err;
2080         if (bmsr & BMSR_LSTATUS) {
2081                 u16 adv, lpa, common, estat;
2082
2083                 err = mii_read(np, np->phy_addr, MII_ADVERTISE);
2084                 if (err < 0)
2085                         goto out;
2086                 adv = err;
2087
2088                 err = mii_read(np, np->phy_addr, MII_LPA);
2089                 if (err < 0)
2090                         goto out;
2091                 lpa = err;
2092
2093                 common = adv & lpa;
2094
2095                 err = mii_read(np, np->phy_addr, MII_ESTATUS);
2096                 if (err < 0)
2097                         goto out;
2098                 estat = err;
2099
2100                 link_up = 1;
2101                 if (estat & (ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
2102                         current_speed = SPEED_1000;
2103                         if (estat & ESTATUS_1000_TFULL)
2104                                 current_duplex = DUPLEX_FULL;
2105                         else
2106                                 current_duplex = DUPLEX_HALF;
2107                 } else {
2108                         if (common & ADVERTISE_100BASE4) {
2109                                 current_speed = SPEED_100;
2110                                 current_duplex = DUPLEX_HALF;
2111                         } else if (common & ADVERTISE_100FULL) {
2112                                 current_speed = SPEED_100;
2113                                 current_duplex = DUPLEX_FULL;
2114                         } else if (common & ADVERTISE_100HALF) {
2115                                 current_speed = SPEED_100;
2116                                 current_duplex = DUPLEX_HALF;
2117                         } else if (common & ADVERTISE_10FULL) {
2118                                 current_speed = SPEED_10;
2119                                 current_duplex = DUPLEX_FULL;
2120                         } else if (common & ADVERTISE_10HALF) {
2121                                 current_speed = SPEED_10;
2122                                 current_duplex = DUPLEX_HALF;
2123                         } else
2124                                 link_up = 0;
2125                 }
2126         }
2127         lp->active_speed = current_speed;
2128         lp->active_duplex = current_duplex;
2129         err = 0;
2130
2131 out:
2132         spin_unlock_irqrestore(&np->lock, flags);
2133
2134         *link_up_p = link_up;
2135         return err;
2136 }
2137
2138 static int niu_link_status(struct niu *np, int *link_up_p)
2139 {
2140         const struct niu_phy_ops *ops = np->phy_ops;
2141         int err;
2142
2143         err = 0;
2144         if (ops->link_status)
2145                 err = ops->link_status(np, link_up_p);
2146
2147         return err;
2148 }
2149
2150 static void niu_timer(unsigned long __opaque)
2151 {
2152         struct niu *np = (struct niu *) __opaque;
2153         unsigned long off;
2154         int err, link_up;
2155
2156         err = niu_link_status(np, &link_up);
2157         if (!err)
2158                 niu_link_status_common(np, link_up);
2159
2160         if (netif_carrier_ok(np->dev))
2161                 off = 5 * HZ;
2162         else
2163                 off = 1 * HZ;
2164         np->timer.expires = jiffies + off;
2165
2166         add_timer(&np->timer);
2167 }
2168
2169 static const struct niu_phy_ops phy_ops_10g_serdes = {
2170         .serdes_init            = serdes_init_10g_serdes,
2171         .link_status            = link_status_10g_serdes,
2172 };
2173
2174 static const struct niu_phy_ops phy_ops_10g_serdes_niu = {
2175         .serdes_init            = serdes_init_niu_10g_serdes,
2176         .link_status            = link_status_10g_serdes,
2177 };
2178
2179 static const struct niu_phy_ops phy_ops_1g_serdes_niu = {
2180         .serdes_init            = serdes_init_niu_1g_serdes,
2181         .link_status            = link_status_1g_serdes,
2182 };
2183
2184 static const struct niu_phy_ops phy_ops_1g_rgmii = {
2185         .xcvr_init              = xcvr_init_1g_rgmii,
2186         .link_status            = link_status_1g_rgmii,
2187 };
2188
2189 static const struct niu_phy_ops phy_ops_10g_fiber_niu = {
2190         .serdes_init            = serdes_init_niu_10g_fiber,
2191         .xcvr_init              = xcvr_init_10g,
2192         .link_status            = link_status_10g,
2193 };
2194
2195 static const struct niu_phy_ops phy_ops_10g_fiber = {
2196         .serdes_init            = serdes_init_10g,
2197         .xcvr_init              = xcvr_init_10g,
2198         .link_status            = link_status_10g,
2199 };
2200
2201 static const struct niu_phy_ops phy_ops_10g_fiber_hotplug = {
2202         .serdes_init            = serdes_init_10g,
2203         .xcvr_init              = xcvr_init_10g_bcm8706,
2204         .link_status            = link_status_10g_hotplug,
2205 };
2206
2207 static const struct niu_phy_ops phy_ops_10g_copper = {
2208         .serdes_init            = serdes_init_10g,
2209         .link_status            = link_status_10g, /* XXX */
2210 };
2211
2212 static const struct niu_phy_ops phy_ops_1g_fiber = {
2213         .serdes_init            = serdes_init_1g,
2214         .xcvr_init              = xcvr_init_1g,
2215         .link_status            = link_status_1g,
2216 };
2217
2218 static const struct niu_phy_ops phy_ops_1g_copper = {
2219         .xcvr_init              = xcvr_init_1g,
2220         .link_status            = link_status_1g,
2221 };
2222
2223 struct niu_phy_template {
2224         const struct niu_phy_ops        *ops;
2225         u32                             phy_addr_base;
2226 };
2227
2228 static const struct niu_phy_template phy_template_niu_10g_fiber = {
2229         .ops            = &phy_ops_10g_fiber_niu,
2230         .phy_addr_base  = 16,
2231 };
2232
2233 static const struct niu_phy_template phy_template_niu_10g_serdes = {
2234         .ops            = &phy_ops_10g_serdes_niu,
2235         .phy_addr_base  = 0,
2236 };
2237
2238 static const struct niu_phy_template phy_template_niu_1g_serdes = {
2239         .ops            = &phy_ops_1g_serdes_niu,
2240         .phy_addr_base  = 0,
2241 };
2242
2243 static const struct niu_phy_template phy_template_10g_fiber = {
2244         .ops            = &phy_ops_10g_fiber,
2245         .phy_addr_base  = 8,
2246 };
2247
2248 static const struct niu_phy_template phy_template_10g_fiber_hotplug = {
2249         .ops            = &phy_ops_10g_fiber_hotplug,
2250         .phy_addr_base  = 8,
2251 };
2252
2253 static const struct niu_phy_template phy_template_10g_copper = {
2254         .ops            = &phy_ops_10g_copper,
2255         .phy_addr_base  = 10,
2256 };
2257
2258 static const struct niu_phy_template phy_template_1g_fiber = {
2259         .ops            = &phy_ops_1g_fiber,
2260         .phy_addr_base  = 0,
2261 };
2262
2263 static const struct niu_phy_template phy_template_1g_copper = {
2264         .ops            = &phy_ops_1g_copper,
2265         .phy_addr_base  = 0,
2266 };
2267
2268 static const struct niu_phy_template phy_template_1g_rgmii = {
2269         .ops            = &phy_ops_1g_rgmii,
2270         .phy_addr_base  = 0,
2271 };
2272
2273 static const struct niu_phy_template phy_template_10g_serdes = {
2274         .ops            = &phy_ops_10g_serdes,
2275         .phy_addr_base  = 0,
2276 };
2277
2278 static int niu_atca_port_num[4] = {
2279         0, 0,  11, 10
2280 };
2281
2282 static int serdes_init_10g_serdes(struct niu *np)
2283 {
2284         struct niu_link_config *lp = &np->link_config;
2285         unsigned long ctrl_reg, test_cfg_reg, pll_cfg, i;
2286         u64 ctrl_val, test_cfg_val, sig, mask, val;
2287         int err;
2288         u64 reset_val;
2289
2290         switch (np->port) {
2291         case 0:
2292                 reset_val =  ENET_SERDES_RESET_0;
2293                 ctrl_reg = ENET_SERDES_0_CTRL_CFG;
2294                 test_cfg_reg = ENET_SERDES_0_TEST_CFG;
2295                 pll_cfg = ENET_SERDES_0_PLL_CFG;
2296                 break;
2297         case 1:
2298                 reset_val =  ENET_SERDES_RESET_1;
2299                 ctrl_reg = ENET_SERDES_1_CTRL_CFG;
2300                 test_cfg_reg = ENET_SERDES_1_TEST_CFG;
2301                 pll_cfg = ENET_SERDES_1_PLL_CFG;
2302                 break;
2303
2304         default:
2305                 return -EINVAL;
2306         }
2307         ctrl_val = (ENET_SERDES_CTRL_SDET_0 |
2308                     ENET_SERDES_CTRL_SDET_1 |
2309                     ENET_SERDES_CTRL_SDET_2 |
2310                     ENET_SERDES_CTRL_SDET_3 |
2311                     (0x5 << ENET_SERDES_CTRL_EMPH_0_SHIFT) |
2312                     (0x5 << ENET_SERDES_CTRL_EMPH_1_SHIFT) |
2313                     (0x5 << ENET_SERDES_CTRL_EMPH_2_SHIFT) |
2314                     (0x5 << ENET_SERDES_CTRL_EMPH_3_SHIFT) |
2315                     (0x1 << ENET_SERDES_CTRL_LADJ_0_SHIFT) |
2316                     (0x1 << ENET_SERDES_CTRL_LADJ_1_SHIFT) |
2317                     (0x1 << ENET_SERDES_CTRL_LADJ_2_SHIFT) |
2318                     (0x1 << ENET_SERDES_CTRL_LADJ_3_SHIFT));
2319         test_cfg_val = 0;
2320
2321         if (lp->loopback_mode == LOOPBACK_PHY) {
2322                 test_cfg_val |= ((ENET_TEST_MD_PAD_LOOPBACK <<
2323                                   ENET_SERDES_TEST_MD_0_SHIFT) |
2324                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2325                                   ENET_SERDES_TEST_MD_1_SHIFT) |
2326                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2327                                   ENET_SERDES_TEST_MD_2_SHIFT) |
2328                                  (ENET_TEST_MD_PAD_LOOPBACK <<
2329                                   ENET_SERDES_TEST_MD_3_SHIFT));
2330         }
2331
2332         esr_reset(np);
2333         nw64(pll_cfg, ENET_SERDES_PLL_FBDIV2);
2334         nw64(ctrl_reg, ctrl_val);
2335         nw64(test_cfg_reg, test_cfg_val);
2336
2337         /* Initialize all 4 lanes of the SERDES.  */
2338         for (i = 0; i < 4; i++) {
2339                 u32 rxtx_ctrl, glue0;
2340
2341                 err = esr_read_rxtx_ctrl(np, i, &rxtx_ctrl);
2342                 if (err)
2343                         return err;
2344                 err = esr_read_glue0(np, i, &glue0);
2345                 if (err)
2346                         return err;
2347
2348                 rxtx_ctrl &= ~(ESR_RXTX_CTRL_VMUXLO);
2349                 rxtx_ctrl |= (ESR_RXTX_CTRL_ENSTRETCH |
2350                               (2 << ESR_RXTX_CTRL_VMUXLO_SHIFT));
2351
2352                 glue0 &= ~(ESR_GLUE_CTRL0_SRATE |
2353                            ESR_GLUE_CTRL0_THCNT |
2354                            ESR_GLUE_CTRL0_BLTIME);
2355                 glue0 |= (ESR_GLUE_CTRL0_RXLOSENAB |
2356                           (0xf << ESR_GLUE_CTRL0_SRATE_SHIFT) |
2357                           (0xff << ESR_GLUE_CTRL0_THCNT_SHIFT) |
2358                           (BLTIME_300_CYCLES <<
2359                            ESR_GLUE_CTRL0_BLTIME_SHIFT));
2360
2361                 err = esr_write_rxtx_ctrl(np, i, rxtx_ctrl);
2362                 if (err)
2363                         return err;
2364                 err = esr_write_glue0(np, i, glue0);
2365                 if (err)
2366                         return err;
2367         }
2368
2369
2370         sig = nr64(ESR_INT_SIGNALS);
2371         switch (np->port) {
2372         case 0:
2373                 mask = ESR_INT_SIGNALS_P0_BITS;
2374                 val = (ESR_INT_SRDY0_P0 |
2375                        ESR_INT_DET0_P0 |
2376                        ESR_INT_XSRDY_P0 |
2377                        ESR_INT_XDP_P0_CH3 |
2378                        ESR_INT_XDP_P0_CH2 |
2379                        ESR_INT_XDP_P0_CH1 |
2380                        ESR_INT_XDP_P0_CH0);
2381                 break;
2382
2383         case 1:
2384                 mask = ESR_INT_SIGNALS_P1_BITS;
2385                 val = (ESR_INT_SRDY0_P1 |
2386                        ESR_INT_DET0_P1 |
2387                        ESR_INT_XSRDY_P1 |
2388                        ESR_INT_XDP_P1_CH3 |
2389                        ESR_INT_XDP_P1_CH2 |
2390                        ESR_INT_XDP_P1_CH1 |
2391                        ESR_INT_XDP_P1_CH0);
2392                 break;
2393
2394         default:
2395                 return -EINVAL;
2396         }
2397
2398         if ((sig & mask) != val) {
2399                 int err;
2400                 err = serdes_init_1g_serdes(np);
2401                 if (!err) {
2402                         np->flags &= ~NIU_FLAGS_10G;
2403                         np->mac_xcvr = MAC_XCVR_PCS;
2404                 }  else {
2405                         dev_err(np->device, PFX "Port %u 10G/1G SERDES Link Failed \n",
2406                          np->port);
2407                         return -ENODEV;
2408                 }
2409         }
2410
2411         return 0;
2412 }
2413
2414 static int niu_determine_phy_disposition(struct niu *np)
2415 {
2416         struct niu_parent *parent = np->parent;
2417         u8 plat_type = parent->plat_type;
2418         const struct niu_phy_template *tp;
2419         u32 phy_addr_off = 0;
2420
2421         if (plat_type == PLAT_TYPE_NIU) {
2422                 switch (np->flags &
2423                         (NIU_FLAGS_10G |
2424                          NIU_FLAGS_FIBER |
2425                          NIU_FLAGS_XCVR_SERDES)) {
2426                 case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
2427                         /* 10G Serdes */
2428                         tp = &phy_template_niu_10g_serdes;
2429                         break;
2430                 case NIU_FLAGS_XCVR_SERDES:
2431                         /* 1G Serdes */
2432                         tp = &phy_template_niu_1g_serdes;
2433                         break;
2434                 case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
2435                         /* 10G Fiber */
2436                 default:
2437                         tp = &phy_template_niu_10g_fiber;
2438                         phy_addr_off += np->port;
2439                         break;
2440                 }
2441         } else {
2442                 switch (np->flags &
2443                         (NIU_FLAGS_10G |
2444                          NIU_FLAGS_FIBER |
2445                          NIU_FLAGS_XCVR_SERDES)) {
2446                 case 0:
2447                         /* 1G copper */
2448                         tp = &phy_template_1g_copper;
2449                         if (plat_type == PLAT_TYPE_VF_P0)
2450                                 phy_addr_off = 10;
2451                         else if (plat_type == PLAT_TYPE_VF_P1)
2452                                 phy_addr_off = 26;
2453
2454                         phy_addr_off += (np->port ^ 0x3);
2455                         break;
2456
2457                 case NIU_FLAGS_10G:
2458                         /* 10G copper */
2459                         tp = &phy_template_1g_copper;
2460                         break;
2461
2462                 case NIU_FLAGS_FIBER:
2463                         /* 1G fiber */
2464                         tp = &phy_template_1g_fiber;
2465                         break;
2466
2467                 case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
2468                         /* 10G fiber */
2469                         tp = &phy_template_10g_fiber;
2470                         if (plat_type == PLAT_TYPE_VF_P0 ||
2471                             plat_type == PLAT_TYPE_VF_P1)
2472                                 phy_addr_off = 8;
2473                         phy_addr_off += np->port;
2474                         if (np->flags & NIU_FLAGS_HOTPLUG_PHY) {
2475                                 tp = &phy_template_10g_fiber_hotplug;
2476                                 if (np->port == 0)
2477                                         phy_addr_off = 8;
2478                                 if (np->port == 1)
2479                                         phy_addr_off = 12;
2480                         }
2481                         break;
2482
2483                 case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
2484                 case NIU_FLAGS_XCVR_SERDES | NIU_FLAGS_FIBER:
2485                 case NIU_FLAGS_XCVR_SERDES:
2486                         switch(np->port) {
2487                         case 0:
2488                         case 1:
2489                                 tp = &phy_template_10g_serdes;
2490                                 break;
2491                         case 2:
2492                         case 3:
2493                                 tp = &phy_template_1g_rgmii;
2494                                 break;
2495                         default:
2496                                 return -EINVAL;
2497                                 break;
2498                         }
2499                         phy_addr_off = niu_atca_port_num[np->port];
2500                         break;
2501
2502                 default:
2503                         return -EINVAL;
2504                 }
2505         }
2506
2507         np->phy_ops = tp->ops;
2508         np->phy_addr = tp->phy_addr_base + phy_addr_off;
2509
2510         return 0;
2511 }
2512
2513 static int niu_init_link(struct niu *np)
2514 {
2515         struct niu_parent *parent = np->parent;
2516         int err, ignore;
2517
2518         if (parent->plat_type == PLAT_TYPE_NIU) {
2519                 err = niu_xcvr_init(np);
2520                 if (err)
2521                         return err;
2522                 msleep(200);
2523         }
2524         err = niu_serdes_init(np);
2525         if (err)
2526                 return err;
2527         msleep(200);
2528         err = niu_xcvr_init(np);
2529         if (!err)
2530                 niu_link_status(np, &ignore);
2531         return 0;
2532 }
2533
2534 static void niu_set_primary_mac(struct niu *np, unsigned char *addr)
2535 {
2536         u16 reg0 = addr[4] << 8 | addr[5];
2537         u16 reg1 = addr[2] << 8 | addr[3];
2538         u16 reg2 = addr[0] << 8 | addr[1];
2539
2540         if (np->flags & NIU_FLAGS_XMAC) {
2541                 nw64_mac(XMAC_ADDR0, reg0);
2542                 nw64_mac(XMAC_ADDR1, reg1);
2543                 nw64_mac(XMAC_ADDR2, reg2);
2544         } else {
2545                 nw64_mac(BMAC_ADDR0, reg0);
2546                 nw64_mac(BMAC_ADDR1, reg1);
2547                 nw64_mac(BMAC_ADDR2, reg2);
2548         }
2549 }
2550
2551 static int niu_num_alt_addr(struct niu *np)
2552 {
2553         if (np->flags & NIU_FLAGS_XMAC)
2554                 return XMAC_NUM_ALT_ADDR;
2555         else
2556                 return BMAC_NUM_ALT_ADDR;
2557 }
2558
2559 static int niu_set_alt_mac(struct niu *np, int index, unsigned char *addr)
2560 {
2561         u16 reg0 = addr[4] << 8 | addr[5];
2562         u16 reg1 = addr[2] << 8 | addr[3];
2563         u16 reg2 = addr[0] << 8 | addr[1];
2564
2565         if (index >= niu_num_alt_addr(np))
2566                 return -EINVAL;
2567
2568         if (np->flags & NIU_FLAGS_XMAC) {
2569                 nw64_mac(XMAC_ALT_ADDR0(index), reg0);
2570                 nw64_mac(XMAC_ALT_ADDR1(index), reg1);
2571                 nw64_mac(XMAC_ALT_ADDR2(index), reg2);
2572         } else {
2573                 nw64_mac(BMAC_ALT_ADDR0(index), reg0);
2574                 nw64_mac(BMAC_ALT_ADDR1(index), reg1);
2575                 nw64_mac(BMAC_ALT_ADDR2(index), reg2);
2576         }
2577
2578         return 0;
2579 }
2580
2581 static int niu_enable_alt_mac(struct niu *np, int index, int on)
2582 {
2583         unsigned long reg;
2584         u64 val, mask;
2585
2586         if (index >= niu_num_alt_addr(np))
2587                 return -EINVAL;
2588
2589         if (np->flags & NIU_FLAGS_XMAC) {
2590                 reg = XMAC_ADDR_CMPEN;
2591                 mask = 1 << index;
2592         } else {
2593                 reg = BMAC_ADDR_CMPEN;
2594                 mask = 1 << (index + 1);
2595         }
2596
2597         val = nr64_mac(reg);
2598         if (on)
2599                 val |= mask;
2600         else
2601                 val &= ~mask;
2602         nw64_mac(reg, val);
2603
2604         return 0;
2605 }
2606
2607 static void __set_rdc_table_num_hw(struct niu *np, unsigned long reg,
2608                                    int num, int mac_pref)
2609 {
2610         u64 val = nr64_mac(reg);
2611         val &= ~(HOST_INFO_MACRDCTBLN | HOST_INFO_MPR);
2612         val |= num;
2613         if (mac_pref)
2614                 val |= HOST_INFO_MPR;
2615         nw64_mac(reg, val);
2616 }
2617
2618 static int __set_rdc_table_num(struct niu *np,
2619                                int xmac_index, int bmac_index,
2620                                int rdc_table_num, int mac_pref)
2621 {
2622         unsigned long reg;
2623
2624         if (rdc_table_num & ~HOST_INFO_MACRDCTBLN)
2625                 return -EINVAL;
2626         if (np->flags & NIU_FLAGS_XMAC)
2627                 reg = XMAC_HOST_INFO(xmac_index);
2628         else
2629                 reg = BMAC_HOST_INFO(bmac_index);
2630         __set_rdc_table_num_hw(np, reg, rdc_table_num, mac_pref);
2631         return 0;
2632 }
2633
2634 static int niu_set_primary_mac_rdc_table(struct niu *np, int table_num,
2635                                          int mac_pref)
2636 {
2637         return __set_rdc_table_num(np, 17, 0, table_num, mac_pref);
2638 }
2639
2640 static int niu_set_multicast_mac_rdc_table(struct niu *np, int table_num,
2641                                            int mac_pref)
2642 {
2643         return __set_rdc_table_num(np, 16, 8, table_num, mac_pref);
2644 }
2645
2646 static int niu_set_alt_mac_rdc_table(struct niu *np, int idx,
2647                                      int table_num, int mac_pref)
2648 {
2649         if (idx >= niu_num_alt_addr(np))
2650                 return -EINVAL;
2651         return __set_rdc_table_num(np, idx, idx + 1, table_num, mac_pref);
2652 }
2653
2654 static u64 vlan_entry_set_parity(u64 reg_val)
2655 {
2656         u64 port01_mask;
2657         u64 port23_mask;
2658
2659         port01_mask = 0x00ff;
2660         port23_mask = 0xff00;
2661
2662         if (hweight64(reg_val & port01_mask) & 1)
2663                 reg_val |= ENET_VLAN_TBL_PARITY0;
2664         else
2665                 reg_val &= ~ENET_VLAN_TBL_PARITY0;
2666
2667         if (hweight64(reg_val & port23_mask) & 1)
2668                 reg_val |= ENET_VLAN_TBL_PARITY1;
2669         else
2670                 reg_val &= ~ENET_VLAN_TBL_PARITY1;
2671
2672         return reg_val;
2673 }
2674
2675 static void vlan_tbl_write(struct niu *np, unsigned long index,
2676                            int port, int vpr, int rdc_table)
2677 {
2678         u64 reg_val = nr64(ENET_VLAN_TBL(index));
2679
2680         reg_val &= ~((ENET_VLAN_TBL_VPR |
2681                       ENET_VLAN_TBL_VLANRDCTBLN) <<
2682                      ENET_VLAN_TBL_SHIFT(port));
2683         if (vpr)
2684                 reg_val |= (ENET_VLAN_TBL_VPR <<
2685                             ENET_VLAN_TBL_SHIFT(port));
2686         reg_val |= (rdc_table << ENET_VLAN_TBL_SHIFT(port));
2687
2688         reg_val = vlan_entry_set_parity(reg_val);
2689
2690         nw64(ENET_VLAN_TBL(index), reg_val);
2691 }
2692
2693 static void vlan_tbl_clear(struct niu *np)
2694 {
2695         int i;
2696
2697         for (i = 0; i < ENET_VLAN_TBL_NUM_ENTRIES; i++)
2698                 nw64(ENET_VLAN_TBL(i), 0);
2699 }
2700
2701 static int tcam_wait_bit(struct niu *np, u64 bit)
2702 {
2703         int limit = 1000;
2704
2705         while (--limit > 0) {
2706                 if (nr64(TCAM_CTL) & bit)
2707                         break;
2708                 udelay(1);
2709         }
2710         if (limit < 0)
2711                 return -ENODEV;
2712
2713         return 0;
2714 }
2715
2716 static int tcam_flush(struct niu *np, int index)
2717 {
2718         nw64(TCAM_KEY_0, 0x00);
2719         nw64(TCAM_KEY_MASK_0, 0xff);
2720         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_WRITE | index));
2721
2722         return tcam_wait_bit(np, TCAM_CTL_STAT);
2723 }
2724
2725 #if 0
2726 static int tcam_read(struct niu *np, int index,
2727                      u64 *key, u64 *mask)
2728 {
2729         int err;
2730
2731         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_READ | index));
2732         err = tcam_wait_bit(np, TCAM_CTL_STAT);
2733         if (!err) {
2734                 key[0] = nr64(TCAM_KEY_0);
2735                 key[1] = nr64(TCAM_KEY_1);
2736                 key[2] = nr64(TCAM_KEY_2);
2737                 key[3] = nr64(TCAM_KEY_3);
2738                 mask[0] = nr64(TCAM_KEY_MASK_0);
2739                 mask[1] = nr64(TCAM_KEY_MASK_1);
2740                 mask[2] = nr64(TCAM_KEY_MASK_2);
2741                 mask[3] = nr64(TCAM_KEY_MASK_3);
2742         }
2743         return err;
2744 }
2745 #endif
2746
2747 static int tcam_write(struct niu *np, int index,
2748                       u64 *key, u64 *mask)
2749 {
2750         nw64(TCAM_KEY_0, key[0]);
2751         nw64(TCAM_KEY_1, key[1]);
2752         nw64(TCAM_KEY_2, key[2]);
2753         nw64(TCAM_KEY_3, key[3]);
2754         nw64(TCAM_KEY_MASK_0, mask[0]);
2755         nw64(TCAM_KEY_MASK_1, mask[1]);
2756         nw64(TCAM_KEY_MASK_2, mask[2]);
2757         nw64(TCAM_KEY_MASK_3, mask[3]);
2758         nw64(TCAM_CTL, (TCAM_CTL_RWC_TCAM_WRITE | index));
2759
2760         return tcam_wait_bit(np, TCAM_CTL_STAT);
2761 }
2762
2763 #if 0
2764 static int tcam_assoc_read(struct niu *np, int index, u64 *data)
2765 {
2766         int err;
2767
2768         nw64(TCAM_CTL, (TCAM_CTL_RWC_RAM_READ | index));
2769         err = tcam_wait_bit(np, TCAM_CTL_STAT);
2770         if (!err)
2771                 *data = nr64(TCAM_KEY_1);
2772
2773         return err;
2774 }
2775 #endif
2776
2777 static int tcam_assoc_write(struct niu *np, int index, u64 assoc_data)
2778 {
2779         nw64(TCAM_KEY_1, assoc_data);
2780         nw64(TCAM_CTL, (TCAM_CTL_RWC_RAM_WRITE | index));
2781
2782         return tcam_wait_bit(np, TCAM_CTL_STAT);
2783 }
2784
2785 static void tcam_enable(struct niu *np, int on)
2786 {
2787         u64 val = nr64(FFLP_CFG_1);
2788
2789         if (on)
2790                 val &= ~FFLP_CFG_1_TCAM_DIS;
2791         else
2792                 val |= FFLP_CFG_1_TCAM_DIS;
2793         nw64(FFLP_CFG_1, val);
2794 }
2795
2796 static void tcam_set_lat_and_ratio(struct niu *np, u64 latency, u64 ratio)
2797 {
2798         u64 val = nr64(FFLP_CFG_1);
2799
2800         val &= ~(FFLP_CFG_1_FFLPINITDONE |
2801                  FFLP_CFG_1_CAMLAT |
2802                  FFLP_CFG_1_CAMRATIO);
2803         val |= (latency << FFLP_CFG_1_CAMLAT_SHIFT);
2804         val |= (ratio << FFLP_CFG_1_CAMRATIO_SHIFT);
2805         nw64(FFLP_CFG_1, val);
2806
2807         val = nr64(FFLP_CFG_1);
2808         val |= FFLP_CFG_1_FFLPINITDONE;
2809         nw64(FFLP_CFG_1, val);
2810 }
2811
2812 static int tcam_user_eth_class_enable(struct niu *np, unsigned long class,
2813                                       int on)
2814 {
2815         unsigned long reg;
2816         u64 val;
2817
2818         if (class < CLASS_CODE_ETHERTYPE1 ||
2819             class > CLASS_CODE_ETHERTYPE2)
2820                 return -EINVAL;
2821
2822         reg = L2_CLS(class - CLASS_CODE_ETHERTYPE1);
2823         val = nr64(reg);
2824         if (on)
2825                 val |= L2_CLS_VLD;
2826         else
2827                 val &= ~L2_CLS_VLD;
2828         nw64(reg, val);
2829
2830         return 0;
2831 }
2832
2833 #if 0
2834 static int tcam_user_eth_class_set(struct niu *np, unsigned long class,
2835                                    u64 ether_type)
2836 {
2837         unsigned long reg;
2838         u64 val;
2839
2840         if (class < CLASS_CODE_ETHERTYPE1 ||
2841             class > CLASS_CODE_ETHERTYPE2 ||
2842             (ether_type & ~(u64)0xffff) != 0)
2843                 return -EINVAL;
2844
2845         reg = L2_CLS(class - CLASS_CODE_ETHERTYPE1);
2846         val = nr64(reg);
2847         val &= ~L2_CLS_ETYPE;
2848         val |= (ether_type << L2_CLS_ETYPE_SHIFT);
2849         nw64(reg, val);
2850
2851         return 0;
2852 }
2853 #endif
2854
2855 static int tcam_user_ip_class_enable(struct niu *np, unsigned long class,
2856                                      int on)
2857 {
2858         unsigned long reg;
2859         u64 val;
2860
2861         if (class < CLASS_CODE_USER_PROG1 ||
2862             class > CLASS_CODE_USER_PROG4)
2863                 return -EINVAL;
2864
2865         reg = L3_CLS(class - CLASS_CODE_USER_PROG1);
2866         val = nr64(reg);
2867         if (on)
2868                 val |= L3_CLS_VALID;
2869         else
2870                 val &= ~L3_CLS_VALID;
2871         nw64(reg, val);
2872
2873         return 0;
2874 }
2875
2876 #if 0
2877 static int tcam_user_ip_class_set(struct niu *np, unsigned long class,
2878                                   int ipv6, u64 protocol_id,
2879                                   u64 tos_mask, u64 tos_val)
2880 {
2881         unsigned long reg;
2882         u64 val;
2883
2884         if (class < CLASS_CODE_USER_PROG1 ||
2885             class > CLASS_CODE_USER_PROG4 ||
2886             (protocol_id & ~(u64)0xff) != 0 ||
2887             (tos_mask & ~(u64)0xff) != 0 ||
2888             (tos_val & ~(u64)0xff) != 0)
2889                 return -EINVAL;
2890
2891         reg = L3_CLS(class - CLASS_CODE_USER_PROG1);
2892         val = nr64(reg);
2893         val &= ~(L3_CLS_IPVER | L3_CLS_PID |
2894                  L3_CLS_TOSMASK | L3_CLS_TOS);
2895         if (ipv6)
2896                 val |= L3_CLS_IPVER;
2897         val |= (protocol_id << L3_CLS_PID_SHIFT);
2898         val |= (tos_mask << L3_CLS_TOSMASK_SHIFT);
2899         val |= (tos_val << L3_CLS_TOS_SHIFT);
2900         nw64(reg, val);
2901
2902         return 0;
2903 }
2904 #endif
2905
2906 static int tcam_early_init(struct niu *np)
2907 {
2908         unsigned long i;
2909         int err;
2910
2911         tcam_enable(np, 0);
2912         tcam_set_lat_and_ratio(np,
2913                                DEFAULT_TCAM_LATENCY,
2914                                DEFAULT_TCAM_ACCESS_RATIO);
2915         for (i = CLASS_CODE_ETHERTYPE1; i <= CLASS_CODE_ETHERTYPE2; i++) {
2916                 err = tcam_user_eth_class_enable(np, i, 0);
2917                 if (err)
2918                         return err;
2919         }
2920         for (i = CLASS_CODE_USER_PROG1; i <= CLASS_CODE_USER_PROG4; i++) {
2921                 err = tcam_user_ip_class_enable(np, i, 0);
2922                 if (err)
2923                         return err;
2924         }
2925
2926         return 0;
2927 }
2928
2929 static int tcam_flush_all(struct niu *np)
2930 {
2931         unsigned long i;
2932
2933         for (i = 0; i < np->parent->tcam_num_entries; i++) {
2934                 int err = tcam_flush(np, i);
2935                 if (err)
2936                         return err;
2937         }
2938         return 0;
2939 }
2940
2941 static u64 hash_addr_regval(unsigned long index, unsigned long num_entries)
2942 {
2943         return ((u64)index | (num_entries == 1 ?
2944                               HASH_TBL_ADDR_AUTOINC : 0));
2945 }
2946
2947 #if 0
2948 static int hash_read(struct niu *np, unsigned long partition,
2949                      unsigned long index, unsigned long num_entries,
2950                      u64 *data)
2951 {
2952         u64 val = hash_addr_regval(index, num_entries);
2953         unsigned long i;
2954
2955         if (partition >= FCRAM_NUM_PARTITIONS ||
2956             index + num_entries > FCRAM_SIZE)
2957                 return -EINVAL;
2958
2959         nw64(HASH_TBL_ADDR(partition), val);
2960         for (i = 0; i < num_entries; i++)
2961                 data[i] = nr64(HASH_TBL_DATA(partition));
2962
2963         return 0;
2964 }
2965 #endif
2966
2967 static int hash_write(struct niu *np, unsigned long partition,
2968                       unsigned long index, unsigned long num_entries,
2969                       u64 *data)
2970 {
2971         u64 val = hash_addr_regval(index, num_entries);
2972         unsigned long i;
2973
2974         if (partition >= FCRAM_NUM_PARTITIONS ||
2975             index + (num_entries * 8) > FCRAM_SIZE)
2976                 return -EINVAL;
2977
2978         nw64(HASH_TBL_ADDR(partition), val);
2979         for (i = 0; i < num_entries; i++)
2980                 nw64(HASH_TBL_DATA(partition), data[i]);
2981
2982         return 0;
2983 }
2984
2985 static void fflp_reset(struct niu *np)
2986 {
2987         u64 val;
2988
2989         nw64(FFLP_CFG_1, FFLP_CFG_1_PIO_FIO_RST);
2990         udelay(10);
2991         nw64(FFLP_CFG_1, 0);
2992
2993         val = FFLP_CFG_1_FCRAMOUTDR_NORMAL | FFLP_CFG_1_FFLPINITDONE;
2994         nw64(FFLP_CFG_1, val);
2995 }
2996
2997 static void fflp_set_timings(struct niu *np)
2998 {
2999         u64 val = nr64(FFLP_CFG_1);
3000
3001         val &= ~FFLP_CFG_1_FFLPINITDONE;
3002         val |= (DEFAULT_FCRAMRATIO << FFLP_CFG_1_FCRAMRATIO_SHIFT);
3003         nw64(FFLP_CFG_1, val);
3004
3005         val = nr64(FFLP_CFG_1);
3006         val |= FFLP_CFG_1_FFLPINITDONE;
3007         nw64(FFLP_CFG_1, val);
3008
3009         val = nr64(FCRAM_REF_TMR);
3010         val &= ~(FCRAM_REF_TMR_MAX | FCRAM_REF_TMR_MIN);
3011         val |= (DEFAULT_FCRAM_REFRESH_MAX << FCRAM_REF_TMR_MAX_SHIFT);
3012         val |= (DEFAULT_FCRAM_REFRESH_MIN << FCRAM_REF_TMR_MIN_SHIFT);
3013         nw64(FCRAM_REF_TMR, val);
3014 }
3015
3016 static int fflp_set_partition(struct niu *np, u64 partition,
3017                               u64 mask, u64 base, int enable)
3018 {
3019         unsigned long reg;
3020         u64 val;
3021
3022         if (partition >= FCRAM_NUM_PARTITIONS ||
3023             (mask & ~(u64)0x1f) != 0 ||
3024             (base & ~(u64)0x1f) != 0)
3025                 return -EINVAL;
3026
3027         reg = FLW_PRT_SEL(partition);
3028
3029         val = nr64(reg);
3030         val &= ~(FLW_PRT_SEL_EXT | FLW_PRT_SEL_MASK | FLW_PRT_SEL_BASE);
3031         val |= (mask << FLW_PRT_SEL_MASK_SHIFT);
3032         val |= (base << FLW_PRT_SEL_BASE_SHIFT);
3033         if (enable)
3034                 val |= FLW_PRT_SEL_EXT;
3035         nw64(reg, val);
3036
3037         return 0;
3038 }
3039
3040 static int fflp_disable_all_partitions(struct niu *np)
3041 {
3042         unsigned long i;
3043
3044         for (i = 0; i < FCRAM_NUM_PARTITIONS; i++) {
3045                 int err = fflp_set_partition(np, 0, 0, 0, 0);
3046                 if (err)
3047                         return err;
3048         }
3049         return 0;
3050 }
3051
3052 static void fflp_llcsnap_enable(struct niu *np, int on)
3053 {
3054         u64 val = nr64(FFLP_CFG_1);
3055
3056         if (on)
3057                 val |= FFLP_CFG_1_LLCSNAP;
3058         else
3059                 val &= ~FFLP_CFG_1_LLCSNAP;
3060         nw64(FFLP_CFG_1, val);
3061 }
3062
3063 static void fflp_errors_enable(struct niu *np, int on)
3064 {
3065         u64 val = nr64(FFLP_CFG_1);
3066
3067         if (on)
3068                 val &= ~FFLP_CFG_1_ERRORDIS;
3069         else
3070                 val |= FFLP_CFG_1_ERRORDIS;
3071         nw64(FFLP_CFG_1, val);
3072 }
3073
3074 static int fflp_hash_clear(struct niu *np)
3075 {
3076         struct fcram_hash_ipv4 ent;
3077         unsigned long i;
3078
3079         /* IPV4 hash entry with valid bit clear, rest is don't care.  */
3080         memset(&ent, 0, sizeof(ent));
3081         ent.header = HASH_HEADER_EXT;
3082
3083         for (i = 0; i < FCRAM_SIZE; i += sizeof(ent)) {
3084                 int err = hash_write(np, 0, i, 1, (u64 *) &ent);
3085                 if (err)
3086                         return err;
3087         }
3088         return 0;
3089 }
3090
3091 static int fflp_early_init(struct niu *np)
3092 {
3093         struct niu_parent *parent;
3094         unsigned long flags;
3095         int err;
3096
3097         niu_lock_parent(np, flags);
3098
3099         parent = np->parent;
3100         err = 0;
3101         if (!(parent->flags & PARENT_FLGS_CLS_HWINIT)) {
3102                 niudbg(PROBE, "fflp_early_init: Initting hw on port %u\n",
3103                        np->port);
3104                 if (np->parent->plat_type != PLAT_TYPE_NIU) {
3105                         fflp_reset(np);
3106                         fflp_set_timings(np);
3107                         err = fflp_disable_all_partitions(np);
3108                         if (err) {
3109                                 niudbg(PROBE, "fflp_disable_all_partitions "
3110                                        "failed, err=%d\n", err);
3111                                 goto out;
3112                         }
3113                 }
3114
3115                 err = tcam_early_init(np);
3116                 if (err) {
3117                         niudbg(PROBE, "tcam_early_init failed, err=%d\n",
3118                                err);
3119                         goto out;
3120                 }
3121                 fflp_llcsnap_enable(np, 1);
3122                 fflp_errors_enable(np, 0);
3123                 nw64(H1POLY, 0);
3124                 nw64(H2POLY, 0);
3125
3126                 err = tcam_flush_all(np);
3127                 if (err) {
3128                         niudbg(PROBE, "tcam_flush_all failed, err=%d\n",
3129                                err);
3130                         goto out;
3131                 }
3132                 if (np->parent->plat_type != PLAT_TYPE_NIU) {
3133                         err = fflp_hash_clear(np);
3134                         if (err) {
3135                                 niudbg(PROBE, "fflp_hash_clear failed, "
3136                                        "err=%d\n", err);
3137                                 goto out;
3138                         }
3139                 }
3140
3141                 vlan_tbl_clear(np);
3142
3143                 niudbg(PROBE, "fflp_early_init: Success\n");
3144                 parent->flags |= PARENT_FLGS_CLS_HWINIT;
3145         }
3146 out:
3147         niu_unlock_parent(np, flags);
3148         return err;
3149 }
3150
3151 static int niu_set_flow_key(struct niu *np, unsigned long class_code, u64 key)
3152 {
3153         if (class_code < CLASS_CODE_USER_PROG1 ||
3154             class_code > CLASS_CODE_SCTP_IPV6)
3155                 return -EINVAL;
3156
3157         nw64(FLOW_KEY(class_code - CLASS_CODE_USER_PROG1), key);
3158         return 0;
3159 }
3160
3161 static int niu_set_tcam_key(struct niu *np, unsigned long class_code, u64 key)
3162 {
3163         if (class_code < CLASS_CODE_USER_PROG1 ||
3164             class_code > CLASS_CODE_SCTP_IPV6)
3165                 return -EINVAL;
3166
3167         nw64(TCAM_KEY(class_code - CLASS_CODE_USER_PROG1), key);
3168         return 0;
3169 }
3170
3171 static void niu_rx_skb_append(struct sk_buff *skb, struct page *page,
3172                               u32 offset, u32 size)
3173 {
3174         int i = skb_shinfo(skb)->nr_frags;
3175         skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
3176
3177         frag->page = page;
3178         frag->page_offset = offset;
3179         frag->size = size;
3180
3181         skb->len += size;
3182         skb->data_len += size;
3183         skb->truesize += size;
3184
3185         skb_shinfo(skb)->nr_frags = i + 1;
3186 }
3187
3188 static unsigned int niu_hash_rxaddr(struct rx_ring_info *rp, u64 a)
3189 {
3190         a >>= PAGE_SHIFT;
3191         a ^= (a >> ilog2(MAX_RBR_RING_SIZE));
3192
3193         return (a & (MAX_RBR_RING_SIZE - 1));
3194 }
3195
3196 static struct page *niu_find_rxpage(struct rx_ring_info *rp, u64 addr,
3197                                     struct page ***link)
3198 {
3199         unsigned int h = niu_hash_rxaddr(rp, addr);
3200         struct page *p, **pp;
3201
3202         addr &= PAGE_MASK;
3203         pp = &rp->rxhash[h];
3204         for (; (p = *pp) != NULL; pp = (struct page **) &p->mapping) {
3205                 if (p->index == addr) {
3206                         *link = pp;
3207                         break;
3208                 }
3209         }
3210
3211         return p;
3212 }
3213
3214 static void niu_hash_page(struct rx_ring_info *rp, struct page *page, u64 base)
3215 {
3216         unsigned int h = niu_hash_rxaddr(rp, base);
3217
3218         page->index = base;
3219         page->mapping = (struct address_space *) rp->rxhash[h];
3220         rp->rxhash[h] = page;
3221 }
3222
3223 static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp,
3224                             gfp_t mask, int start_index)
3225 {
3226         struct page *page;
3227         u64 addr;
3228         int i;
3229
3230         page = alloc_page(mask);
3231         if (!page)
3232                 return -ENOMEM;
3233
3234         addr = np->ops->map_page(np->device, page, 0,
3235                                  PAGE_SIZE, DMA_FROM_DEVICE);
3236
3237         niu_hash_page(rp, page, addr);
3238         if (rp->rbr_blocks_per_page > 1)
3239                 atomic_add(rp->rbr_blocks_per_page - 1,
3240                            &compound_head(page)->_count);
3241
3242         for (i = 0; i < rp->rbr_blocks_per_page; i++) {
3243                 __le32 *rbr = &rp->rbr[start_index + i];
3244
3245                 *rbr = cpu_to_le32(addr >> RBR_DESCR_ADDR_SHIFT);
3246                 addr += rp->rbr_block_size;
3247         }
3248
3249         return 0;
3250 }
3251
3252 static void niu_rbr_refill(struct niu *np, struct rx_ring_info *rp, gfp_t mask)
3253 {
3254         int index = rp->rbr_index;
3255
3256         rp->rbr_pending++;
3257         if ((rp->rbr_pending % rp->rbr_blocks_per_page) == 0) {
3258                 int err = niu_rbr_add_page(np, rp, mask, index);
3259
3260                 if (unlikely(err)) {
3261                         rp->rbr_pending--;
3262                         return;
3263                 }
3264
3265                 rp->rbr_index += rp->rbr_blocks_per_page;
3266                 BUG_ON(rp->rbr_index > rp->rbr_table_size);
3267                 if (rp->rbr_index == rp->rbr_table_size)
3268                         rp->rbr_index = 0;
3269
3270                 if (rp->rbr_pending >= rp->rbr_kick_thresh) {
3271                         nw64(RBR_KICK(rp->rx_channel), rp->rbr_pending);
3272                         rp->rbr_pending = 0;
3273                 }
3274         }
3275 }
3276
3277 static int niu_rx_pkt_ignore(struct niu *np, struct rx_ring_info *rp)
3278 {
3279         unsigned int index = rp->rcr_index;
3280         int num_rcr = 0;
3281
3282         rp->rx_dropped++;
3283         while (1) {
3284                 struct page *page, **link;
3285                 u64 addr, val;
3286                 u32 rcr_size;
3287
3288                 num_rcr++;
3289
3290                 val = le64_to_cpup(&rp->rcr[index]);
3291                 addr = (val & RCR_ENTRY_PKT_BUF_ADDR) <<
3292                         RCR_ENTRY_PKT_BUF_ADDR_SHIFT;
3293                 page = niu_find_rxpage(rp, addr, &link);
3294
3295                 rcr_size = rp->rbr_sizes[(val & RCR_ENTRY_PKTBUFSZ) >>
3296                                          RCR_ENTRY_PKTBUFSZ_SHIFT];
3297                 if ((page->index + PAGE_SIZE) - rcr_size == addr) {
3298                         *link = (struct page *) page->mapping;
3299                         np->ops->unmap_page(np->device, page->index,
3300                                             PAGE_SIZE, DMA_FROM_DEVICE);
3301                         page->index = 0;
3302                         page->mapping = NULL;
3303                         __free_page(page);
3304                         rp->rbr_refill_pending++;
3305                 }
3306
3307                 index = NEXT_RCR(rp, index);
3308                 if (!(val & RCR_ENTRY_MULTI))
3309                         break;
3310
3311         }
3312         rp->rcr_index = index;
3313
3314         return num_rcr;
3315 }
3316
3317 static int niu_process_rx_pkt(struct niu *np, struct rx_ring_info *rp)
3318 {
3319         unsigned int index = rp->rcr_index;
3320         struct sk_buff *skb;
3321         int len, num_rcr;
3322
3323         skb = netdev_alloc_skb(np->dev, RX_SKB_ALLOC_SIZE);
3324         if (unlikely(!skb))
3325                 return niu_rx_pkt_ignore(np, rp);
3326
3327         num_rcr = 0;
3328         while (1) {
3329                 struct page *page, **link;
3330                 u32 rcr_size, append_size;
3331                 u64 addr, val, off;
3332
3333                 num_rcr++;
3334
3335                 val = le64_to_cpup(&rp->rcr[index]);
3336
3337                 len = (val & RCR_ENTRY_L2_LEN) >>
3338                         RCR_ENTRY_L2_LEN_SHIFT;
3339                 len -= ETH_FCS_LEN;
3340
3341                 addr = (val & RCR_ENTRY_PKT_BUF_ADDR) <<
3342                         RCR_ENTRY_PKT_BUF_ADDR_SHIFT;
3343                 page = niu_find_rxpage(rp, addr, &link);
3344
3345                 rcr_size = rp->rbr_sizes[(val & RCR_ENTRY_PKTBUFSZ) >>
3346                                          RCR_ENTRY_PKTBUFSZ_SHIFT];
3347
3348                 off = addr & ~PAGE_MASK;
3349                 append_size = rcr_size;
3350                 if (num_rcr == 1) {
3351                         int ptype;
3352
3353                         off += 2;
3354                         append_size -= 2;
3355
3356                         ptype = (val >> RCR_ENTRY_PKT_TYPE_SHIFT);
3357                         if ((ptype == RCR_PKT_TYPE_TCP ||
3358                              ptype == RCR_PKT_TYPE_UDP) &&
3359                             !(val & (RCR_ENTRY_NOPORT |
3360                                      RCR_ENTRY_ERROR)))
3361                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3362                         else
3363                                 skb->ip_summed = CHECKSUM_NONE;
3364                 }
3365                 if (!(val & RCR_ENTRY_MULTI))
3366                         append_size = len - skb->len;
3367
3368                 niu_rx_skb_append(skb, page, off, append_size);
3369                 if ((page->index + rp->rbr_block_size) - rcr_size == addr) {
3370                         *link = (struct page *) page->mapping;
3371                         np->ops->unmap_page(np->device, page->index,
3372                                             PAGE_SIZE, DMA_FROM_DEVICE);
3373                         page->index = 0;
3374                         page->mapping = NULL;
3375                         rp->rbr_refill_pending++;
3376                 } else
3377                         get_page(page);
3378
3379                 index = NEXT_RCR(rp, index);
3380                 if (!(val & RCR_ENTRY_MULTI))
3381                         break;
3382
3383         }
3384         rp->rcr_index = index;
3385
3386         skb_reserve(skb, NET_IP_ALIGN);
3387         __pskb_pull_tail(skb, min(len, NIU_RXPULL_MAX));
3388
3389         rp->rx_packets++;
3390         rp->rx_bytes += skb->len;
3391
3392         skb->protocol = eth_type_trans(skb, np->dev);
3393         netif_receive_skb(skb);
3394
3395         np->dev->last_rx = jiffies;
3396
3397         return num_rcr;
3398 }
3399
3400 static int niu_rbr_fill(struct niu *np, struct rx_ring_info *rp, gfp_t mask)
3401 {
3402         int blocks_per_page = rp->rbr_blocks_per_page;
3403         int err, index = rp->rbr_index;
3404
3405         err = 0;
3406         while (index < (rp->rbr_table_size - blocks_per_page)) {
3407                 err = niu_rbr_add_page(np, rp, mask, index);
3408                 if (err)
3409                         break;
3410
3411                 index += blocks_per_page;
3412         }
3413
3414         rp->rbr_index = index;
3415         return err;
3416 }
3417
3418 static void niu_rbr_free(struct niu *np, struct rx_ring_info *rp)
3419 {
3420         int i;
3421
3422         for (i = 0; i < MAX_RBR_RING_SIZE; i++) {
3423                 struct page *page;
3424
3425                 page = rp->rxhash[i];
3426                 while (page) {
3427                         struct page *next = (struct page *) page->mapping;
3428                         u64 base = page->index;
3429
3430                         np->ops->unmap_page(np->device, base, PAGE_SIZE,
3431                                             DMA_FROM_DEVICE);
3432                         page->index = 0;
3433                         page->mapping = NULL;
3434
3435                         __free_page(page);
3436
3437                         page = next;
3438                 }
3439         }
3440
3441         for (i = 0; i < rp->rbr_table_size; i++)
3442                 rp->rbr[i] = cpu_to_le32(0);
3443         rp->rbr_index = 0;
3444 }
3445
3446 static int release_tx_packet(struct niu *np, struct tx_ring_info *rp, int idx)
3447 {
3448         struct tx_buff_info *tb = &rp->tx_buffs[idx];
3449         struct sk_buff *skb = tb->skb;
3450         struct tx_pkt_hdr *tp;
3451         u64 tx_flags;
3452         int i, len;
3453
3454         tp = (struct tx_pkt_hdr *) skb->data;
3455         tx_flags = le64_to_cpup(&tp->flags);
3456
3457         rp->tx_packets++;
3458         rp->tx_bytes += (((tx_flags & TXHDR_LEN) >> TXHDR_LEN_SHIFT) -
3459                          ((tx_flags & TXHDR_PAD) / 2));
3460
3461         len = skb_headlen(skb);
3462         np->ops->unmap_single(np->device, tb->mapping,
3463                               len, DMA_TO_DEVICE);
3464
3465         if (le64_to_cpu(rp->descr[idx]) & TX_DESC_MARK)
3466                 rp->mark_pending--;
3467
3468         tb->skb = NULL;
3469         do {
3470                 idx = NEXT_TX(rp, idx);
3471                 len -= MAX_TX_DESC_LEN;
3472         } while (len > 0);
3473
3474         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
3475                 tb = &rp->tx_buffs[idx];
3476                 BUG_ON(tb->skb != NULL);
3477                 np->ops->unmap_page(np->device, tb->mapping,
3478                                     skb_shinfo(skb)->frags[i].size,
3479                                     DMA_TO_DEVICE);
3480                 idx = NEXT_TX(rp, idx);
3481         }
3482
3483         dev_kfree_skb(skb);
3484
3485         return idx;
3486 }
3487
3488 #define NIU_TX_WAKEUP_THRESH(rp)                ((rp)->pending / 4)
3489
3490 static void niu_tx_work(struct niu *np, struct tx_ring_info *rp)
3491 {
3492         struct netdev_queue *txq;
3493         u16 pkt_cnt, tmp;
3494         int cons, index;
3495         u64 cs;
3496
3497         index = (rp - np->tx_rings);
3498         txq = netdev_get_tx_queue(np->dev, index);
3499
3500         cs = rp->tx_cs;
3501         if (unlikely(!(cs & (TX_CS_MK | TX_CS_MMK))))
3502                 goto out;
3503
3504         tmp = pkt_cnt = (cs & TX_CS_PKT_CNT) >> TX_CS_PKT_CNT_SHIFT;
3505         pkt_cnt = (pkt_cnt - rp->last_pkt_cnt) &
3506                 (TX_CS_PKT_CNT >> TX_CS_PKT_CNT_SHIFT);
3507
3508         rp->last_pkt_cnt = tmp;
3509
3510         cons = rp->cons;
3511
3512         niudbg(TX_DONE, "%s: niu_tx_work() pkt_cnt[%u] cons[%d]\n",
3513                np->dev->name, pkt_cnt, cons);
3514
3515         while (pkt_cnt--)
3516                 cons = release_tx_packet(np, rp, cons);
3517
3518         rp->cons = cons;
3519         smp_mb();
3520
3521 out:
3522         if (unlikely(netif_tx_queue_stopped(txq) &&
3523                      (niu_tx_avail(rp) > NIU_TX_WAKEUP_THRESH(rp)))) {
3524                 __netif_tx_lock(txq, smp_processor_id());
3525                 if (netif_tx_queue_stopped(txq) &&
3526                     (niu_tx_avail(rp) > NIU_TX_WAKEUP_THRESH(rp)))
3527                         netif_tx_wake_queue(txq);
3528                 __netif_tx_unlock(txq);
3529         }
3530 }
3531
3532 static int niu_rx_work(struct niu *np, struct rx_ring_info *rp, int budget)
3533 {
3534         int qlen, rcr_done = 0, work_done = 0;
3535         struct rxdma_mailbox *mbox = rp->mbox;
3536         u64 stat;
3537
3538 #if 1
3539         stat = nr64(RX_DMA_CTL_STAT(rp->rx_channel));
3540         qlen = nr64(RCRSTAT_A(rp->rx_channel)) & RCRSTAT_A_QLEN;
3541 #else
3542         stat = le64_to_cpup(&mbox->rx_dma_ctl_stat);
3543         qlen = (le64_to_cpup(&mbox->rcrstat_a) & RCRSTAT_A_QLEN);
3544 #endif
3545         mbox->rx_dma_ctl_stat = 0;
3546         mbox->rcrstat_a = 0;
3547
3548         niudbg(RX_STATUS, "%s: niu_rx_work(chan[%d]), stat[%llx] qlen=%d\n",
3549                np->dev->name, rp->rx_channel, (unsigned long long) stat, qlen);
3550
3551         rcr_done = work_done = 0;
3552         qlen = min(qlen, budget);
3553         while (work_done < qlen) {
3554                 rcr_done += niu_process_rx_pkt(np, rp);
3555                 work_done++;
3556         }
3557
3558         if (rp->rbr_refill_pending >= rp->rbr_kick_thresh) {
3559                 unsigned int i;
3560
3561                 for (i = 0; i < rp->rbr_refill_pending; i++)
3562                         niu_rbr_refill(np, rp, GFP_ATOMIC);
3563                 rp->rbr_refill_pending = 0;
3564         }
3565
3566         stat = (RX_DMA_CTL_STAT_MEX |
3567                 ((u64)work_done << RX_DMA_CTL_STAT_PKTREAD_SHIFT) |
3568                 ((u64)rcr_done << RX_DMA_CTL_STAT_PTRREAD_SHIFT));
3569
3570         nw64(RX_DMA_CTL_STAT(rp->rx_channel), stat);
3571
3572         return work_done;
3573 }
3574
3575 static int niu_poll_core(struct niu *np, struct niu_ldg *lp, int budget)
3576 {
3577         u64 v0 = lp->v0;
3578         u32 tx_vec = (v0 >> 32);
3579         u32 rx_vec = (v0 & 0xffffffff);
3580         int i, work_done = 0;
3581
3582         niudbg(INTR, "%s: niu_poll_core() v0[%016llx]\n",
3583                np->dev->name, (unsigned long long) v0);
3584
3585         for (i = 0; i < np->num_tx_rings; i++) {
3586                 struct tx_ring_info *rp = &np->tx_rings[i];
3587                 if (tx_vec & (1 << rp->tx_channel))
3588                         niu_tx_work(np, rp);
3589                 nw64(LD_IM0(LDN_TXDMA(rp->tx_channel)), 0);
3590         }
3591
3592         for (i = 0; i < np->num_rx_rings; i++) {
3593                 struct rx_ring_info *rp = &np->rx_rings[i];
3594
3595                 if (rx_vec & (1 << rp->rx_channel)) {
3596                         int this_work_done;
3597
3598                         this_work_done = niu_rx_work(np, rp,
3599                                                      budget);
3600
3601                         budget -= this_work_done;
3602                         work_done += this_work_done;
3603                 }
3604                 nw64(LD_IM0(LDN_RXDMA(rp->rx_channel)), 0);
3605         }
3606
3607         return work_done;
3608 }
3609
3610 static int niu_poll(struct napi_struct *napi, int budget)
3611 {
3612         struct niu_ldg *lp = container_of(napi, struct niu_ldg, napi);
3613         struct niu *np = lp->np;
3614         int work_done;
3615
3616         work_done = niu_poll_core(np, lp, budget);
3617
3618         if (work_done < budget) {
3619                 netif_rx_complete(np->dev, napi);
3620                 niu_ldg_rearm(np, lp, 1);
3621         }
3622         return work_done;
3623 }
3624
3625 static void niu_log_rxchan_errors(struct niu *np, struct rx_ring_info *rp,
3626                                   u64 stat)
3627 {
3628         dev_err(np->device, PFX "%s: RX channel %u errors ( ",
3629                 np->dev->name, rp->rx_channel);
3630
3631         if (stat & RX_DMA_CTL_STAT_RBR_TMOUT)
3632                 printk("RBR_TMOUT ");
3633         if (stat & RX_DMA_CTL_STAT_RSP_CNT_ERR)
3634                 printk("RSP_CNT ");
3635         if (stat & RX_DMA_CTL_STAT_BYTE_EN_BUS)
3636                 printk("BYTE_EN_BUS ");
3637         if (stat & RX_DMA_CTL_STAT_RSP_DAT_ERR)
3638                 printk("RSP_DAT ");
3639         if (stat & RX_DMA_CTL_STAT_RCR_ACK_ERR)
3640                 printk("RCR_ACK ");
3641         if (stat & RX_DMA_CTL_STAT_RCR_SHA_PAR)
3642                 printk("RCR_SHA_PAR ");
3643         if (stat & RX_DMA_CTL_STAT_RBR_PRE_PAR)
3644                 printk("RBR_PRE_PAR ");
3645         if (stat & RX_DMA_CTL_STAT_CONFIG_ERR)
3646                 printk("CONFIG ");
3647         if (stat & RX_DMA_CTL_STAT_RCRINCON)
3648                 printk("RCRINCON ");
3649         if (stat & RX_DMA_CTL_STAT_RCRFULL)
3650                 printk("RCRFULL ");
3651         if (stat & RX_DMA_CTL_STAT_RBRFULL)
3652                 printk("RBRFULL ");
3653         if (stat & RX_DMA_CTL_STAT_RBRLOGPAGE)
3654                 printk("RBRLOGPAGE ");
3655         if (stat & RX_DMA_CTL_STAT_CFIGLOGPAGE)
3656                 printk("CFIGLOGPAGE ");
3657         if (stat & RX_DMA_CTL_STAT_DC_FIFO_ERR)
3658                 printk("DC_FIDO ");
3659
3660         printk(")\n");
3661 }
3662
3663 static int niu_rx_error(struct niu *np, struct rx_ring_info *rp)
3664 {
3665         u64 stat = nr64(RX_DMA_CTL_STAT(rp->rx_channel));
3666         int err = 0;
3667
3668
3669         if (stat & (RX_DMA_CTL_STAT_CHAN_FATAL |
3670                     RX_DMA_CTL_STAT_PORT_FATAL))
3671                 err = -EINVAL;
3672
3673         if (err) {
3674                 dev_err(np->device, PFX "%s: RX channel %u error, stat[%llx]\n",
3675                         np->dev->name, rp->rx_channel,
3676                         (unsigned long long) stat);
3677
3678                 niu_log_rxchan_errors(np, rp, stat);
3679         }
3680
3681         nw64(RX_DMA_CTL_STAT(rp->rx_channel),
3682              stat & RX_DMA_CTL_WRITE_CLEAR_ERRS);
3683
3684         return err;
3685 }
3686
3687 static void niu_log_txchan_errors(struct niu *np, struct tx_ring_info *rp,
3688                                   u64 cs)
3689 {
3690         dev_err(np->device, PFX "%s: TX channel %u errors ( ",
3691                 np->dev->name, rp->tx_channel);
3692
3693         if (cs & TX_CS_MBOX_ERR)
3694                 printk("MBOX ");
3695         if (cs & TX_CS_PKT_SIZE_ERR)
3696                 printk("PKT_SIZE ");
3697         if (cs & TX_CS_TX_RING_OFLOW)
3698                 printk("TX_RING_OFLOW ");
3699         if (cs & TX_CS_PREF_BUF_PAR_ERR)
3700                 printk("PREF_BUF_PAR ");
3701         if (cs & TX_CS_NACK_PREF)
3702                 printk("NACK_PREF ");
3703         if (cs & TX_CS_NACK_PKT_RD)
3704                 printk("NACK_PKT_RD ");
3705         if (cs & TX_CS_CONF_PART_ERR)
3706                 printk("CONF_PART ");
3707         if (cs & TX_CS_PKT_PRT_ERR)
3708                 printk("PKT_PTR ");
3709
3710         printk(")\n");
3711 }
3712
3713 static int niu_tx_error(struct niu *np, struct tx_ring_info *rp)
3714 {
3715         u64 cs, logh, logl;
3716
3717         cs = nr64(TX_CS(rp->tx_channel));
3718         logh = nr64(TX_RNG_ERR_LOGH(rp->tx_channel));
3719         logl = nr64(TX_RNG_ERR_LOGL(rp->tx_channel));
3720
3721         dev_err(np->device, PFX "%s: TX channel %u error, "
3722                 "cs[%llx] logh[%llx] logl[%llx]\n",
3723                 np->dev->name, rp->tx_channel,
3724                 (unsigned long long) cs,
3725                 (unsigned long long) logh,
3726                 (unsigned long long) logl);
3727
3728         niu_log_txchan_errors(np, rp, cs);
3729
3730         return -ENODEV;
3731 }
3732
3733 static int niu_mif_interrupt(struct niu *np)
3734 {
3735         u64 mif_status = nr64(MIF_STATUS);
3736         int phy_mdint = 0;
3737
3738         if (np->flags & NIU_FLAGS_XMAC) {
3739                 u64 xrxmac_stat = nr64_mac(XRXMAC_STATUS);
3740
3741                 if (xrxmac_stat & XRXMAC_STATUS_PHY_MDINT)
3742                         phy_mdint = 1;
3743         }
3744
3745         dev_err(np->device, PFX "%s: MIF interrupt, "
3746                 "stat[%llx] phy_mdint(%d)\n",
3747                 np->dev->name, (unsigned long long) mif_status, phy_mdint);
3748
3749         return -ENODEV;
3750 }
3751
3752 static void niu_xmac_interrupt(struct niu *np)
3753 {
3754         struct niu_xmac_stats *mp = &np->mac_stats.xmac;
3755         u64 val;
3756
3757         val = nr64_mac(XTXMAC_STATUS);
3758         if (val & XTXMAC_STATUS_FRAME_CNT_EXP)
3759                 mp->tx_frames += TXMAC_FRM_CNT_COUNT;
3760         if (val & XTXMAC_STATUS_BYTE_CNT_EXP)
3761                 mp->tx_bytes += TXMAC_BYTE_CNT_COUNT;
3762         if (val & XTXMAC_STATUS_TXFIFO_XFR_ERR)
3763                 mp->tx_fifo_errors++;
3764         if (val & XTXMAC_STATUS_TXMAC_OFLOW)
3765                 mp->tx_overflow_errors++;
3766         if (val & XTXMAC_STATUS_MAX_PSIZE_ERR)
3767                 mp->tx_max_pkt_size_errors++;
3768         if (val & XTXMAC_STATUS_TXMAC_UFLOW)
3769                 mp->tx_underflow_errors++;
3770
3771         val = nr64_mac(XRXMAC_STATUS);
3772         if (val & XRXMAC_STATUS_LCL_FLT_STATUS)
3773                 mp->rx_local_faults++;
3774         if (val & XRXMAC_STATUS_RFLT_DET)
3775                 mp->rx_remote_faults++;
3776         if (val & XRXMAC_STATUS_LFLT_CNT_EXP)
3777                 mp->rx_link_faults += LINK_FAULT_CNT_COUNT;
3778         if (val & XRXMAC_STATUS_ALIGNERR_CNT_EXP)
3779                 mp->rx_align_errors += RXMAC_ALIGN_ERR_CNT_COUNT;
3780         if (val & XRXMAC_STATUS_RXFRAG_CNT_EXP)
3781                 mp->rx_frags += RXMAC_FRAG_CNT_COUNT;
3782         if (val & XRXMAC_STATUS_RXMULTF_CNT_EXP)
3783                 mp->rx_mcasts += RXMAC_MC_FRM_CNT_COUNT;
3784         if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
3785                 mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
3786         if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
3787                 mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
3788         if (val & XRXMAC_STATUS_RXHIST1_CNT_EXP)
3789                 mp->rx_hist_cnt1 += RXMAC_HIST_CNT1_COUNT;
3790         if (val & XRXMAC_STATUS_RXHIST2_CNT_EXP)
3791                 mp->rx_hist_cnt2 += RXMAC_HIST_CNT2_COUNT;
3792         if (val & XRXMAC_STATUS_RXHIST3_CNT_EXP)
3793                 mp->rx_hist_cnt3 += RXMAC_HIST_CNT3_COUNT;
3794         if (val & XRXMAC_STATUS_RXHIST4_CNT_EXP)
3795                 mp->rx_hist_cnt4 += RXMAC_HIST_CNT4_COUNT;
3796         if (val & XRXMAC_STATUS_RXHIST5_CNT_EXP)
3797                 mp->rx_hist_cnt5 += RXMAC_HIST_CNT5_COUNT;
3798         if (val & XRXMAC_STATUS_RXHIST6_CNT_EXP)
3799                 mp->rx_hist_cnt6 += RXMAC_HIST_CNT6_COUNT;
3800         if (val & XRXMAC_STATUS_RXHIST7_CNT_EXP)
3801                 mp->rx_hist_cnt7 += RXMAC_HIST_CNT7_COUNT;
3802         if (val & XRXMAC_STAT_MSK_RXOCTET_CNT_EXP)
3803                 mp->rx_octets += RXMAC_BT_CNT_COUNT;
3804         if (val & XRXMAC_STATUS_CVIOLERR_CNT_EXP)
3805                 mp->rx_code_violations += RXMAC_CD_VIO_CNT_COUNT;
3806         if (val & XRXMAC_STATUS_LENERR_CNT_EXP)
3807                 mp->rx_len_errors += RXMAC_MPSZER_CNT_COUNT;
3808         if (val & XRXMAC_STATUS_CRCERR_CNT_EXP)
3809                 mp->rx_crc_errors += RXMAC_CRC_ER_CNT_COUNT;
3810         if (val & XRXMAC_STATUS_RXUFLOW)
3811                 mp->rx_underflows++;
3812         if (val & XRXMAC_STATUS_RXOFLOW)
3813                 mp->rx_overflows++;
3814
3815         val = nr64_mac(XMAC_FC_STAT);
3816         if (val & XMAC_FC_STAT_TX_MAC_NPAUSE)
3817                 mp->pause_off_state++;
3818         if (val & XMAC_FC_STAT_TX_MAC_PAUSE)
3819                 mp->pause_on_state++;
3820         if (val & XMAC_FC_STAT_RX_MAC_RPAUSE)
3821                 mp->pause_received++;
3822 }
3823
3824 static void niu_bmac_interrupt(struct niu *np)
3825 {
3826         struct niu_bmac_stats *mp = &np->mac_stats.bmac;
3827         u64 val;
3828
3829         val = nr64_mac(BTXMAC_STATUS);
3830         if (val & BTXMAC_STATUS_UNDERRUN)
3831                 mp->tx_underflow_errors++;
3832         if (val & BTXMAC_STATUS_MAX_PKT_ERR)
3833                 mp->tx_max_pkt_size_errors++;
3834         if (val & BTXMAC_STATUS_BYTE_CNT_EXP)
3835                 mp->tx_bytes += BTXMAC_BYTE_CNT_COUNT;
3836         if (val & BTXMAC_STATUS_FRAME_CNT_EXP)
3837                 mp->tx_frames += BTXMAC_FRM_CNT_COUNT;
3838
3839         val = nr64_mac(BRXMAC_STATUS);
3840         if (val & BRXMAC_STATUS_OVERFLOW)
3841                 mp->rx_overflows++;
3842         if (val & BRXMAC_STATUS_FRAME_CNT_EXP)
3843                 mp->rx_frames += BRXMAC_FRAME_CNT_COUNT;
3844         if (val & BRXMAC_STATUS_ALIGN_ERR_EXP)
3845                 mp->rx_align_errors += BRXMAC_ALIGN_ERR_CNT_COUNT;
3846         if (val & BRXMAC_STATUS_CRC_ERR_EXP)
3847                 mp->rx_crc_errors += BRXMAC_ALIGN_ERR_CNT_COUNT;
3848         if (val & BRXMAC_STATUS_LEN_ERR_EXP)
3849                 mp->rx_len_errors += BRXMAC_CODE_VIOL_ERR_CNT_COUNT;
3850
3851         val = nr64_mac(BMAC_CTRL_STATUS);
3852         if (val & BMAC_CTRL_STATUS_NOPAUSE)
3853                 mp->pause_off_state++;
3854         if (val & BMAC_CTRL_STATUS_PAUSE)
3855                 mp->pause_on_state++;
3856         if (val & BMAC_CTRL_STATUS_PAUSE_RECV)
3857                 mp->pause_received++;
3858 }
3859
3860 static int niu_mac_interrupt(struct niu *np)
3861 {
3862         if (np->flags & NIU_FLAGS_XMAC)
3863                 niu_xmac_interrupt(np);
3864         else
3865                 niu_bmac_interrupt(np);
3866
3867         return 0;
3868 }
3869
3870 static void niu_log_device_error(struct niu *np, u64 stat)
3871 {
3872         dev_err(np->device, PFX "%s: Core device errors ( ",
3873                 np->dev->name);
3874
3875         if (stat & SYS_ERR_MASK_META2)
3876                 printk("META2 ");
3877         if (stat & SYS_ERR_MASK_META1)
3878                 printk("META1 ");
3879         if (stat & SYS_ERR_MASK_PEU)
3880                 printk("PEU ");
3881         if (stat & SYS_ERR_MASK_TXC)
3882                 printk("TXC ");
3883         if (stat & SYS_ERR_MASK_RDMC)
3884                 printk("RDMC ");
3885         if (stat & SYS_ERR_MASK_TDMC)
3886                 printk("TDMC ");
3887         if (stat & SYS_ERR_MASK_ZCP)
3888                 printk("ZCP ");
3889         if (stat & SYS_ERR_MASK_FFLP)
3890                 printk("FFLP ");
3891         if (stat & SYS_ERR_MASK_IPP)
3892                 printk("IPP ");
3893         if (stat & SYS_ERR_MASK_MAC)
3894                 printk("MAC ");
3895         if (stat & SYS_ERR_MASK_SMX)
3896                 printk("SMX ");
3897
3898         printk(")\n");
3899 }
3900
3901 static int niu_device_error(struct niu *np)
3902 {
3903         u64 stat = nr64(SYS_ERR_STAT);
3904
3905         dev_err(np->device, PFX "%s: Core device error, stat[%llx]\n",
3906                 np->dev->name, (unsigned long long) stat);
3907
3908         niu_log_device_error(np, stat);
3909
3910         return -ENODEV;
3911 }
3912
3913 static int niu_slowpath_interrupt(struct niu *np, struct niu_ldg *lp,
3914                               u64 v0, u64 v1, u64 v2)
3915 {
3916
3917         int i, err = 0;
3918
3919         lp->v0 = v0;
3920         lp->v1 = v1;
3921         lp->v2 = v2;
3922
3923         if (v1 & 0x00000000ffffffffULL) {
3924                 u32 rx_vec = (v1 & 0xffffffff);
3925
3926                 for (i = 0; i < np->num_rx_rings; i++) {
3927                         struct rx_ring_info *rp = &np->rx_rings[i];
3928
3929                         if (rx_vec & (1 << rp->rx_channel)) {
3930                                 int r = niu_rx_error(np, rp);
3931                                 if (r) {
3932                                         err = r;
3933                                 } else {
3934                                         if (!v0)
3935                                                 nw64(RX_DMA_CTL_STAT(rp->rx_channel),
3936                                                      RX_DMA_CTL_STAT_MEX);
3937                                 }
3938                         }
3939                 }
3940         }
3941         if (v1 & 0x7fffffff00000000ULL) {
3942                 u32 tx_vec = (v1 >> 32) & 0x7fffffff;
3943
3944                 for (i = 0; i < np->num_tx_rings; i++) {
3945                         struct tx_ring_info *rp = &np->tx_rings[i];
3946
3947                         if (tx_vec & (1 << rp->tx_channel)) {
3948                                 int r = niu_tx_error(np, rp);
3949                                 if (r)
3950                                         err = r;
3951                         }
3952                 }
3953         }
3954         if ((v0 | v1) & 0x8000000000000000ULL) {
3955                 int r = niu_mif_interrupt(np);
3956                 if (r)
3957                         err = r;
3958         }
3959         if (v2) {
3960                 if (v2 & 0x01ef) {
3961                         int r = niu_mac_interrupt(np);
3962                         if (r)
3963                                 err = r;
3964                 }
3965                 if (v2 & 0x0210) {
3966                         int r = niu_device_error(np);
3967                         if (r)
3968                                 err = r;
3969                 }
3970         }
3971
3972         if (err)
3973                 niu_enable_interrupts(np, 0);
3974
3975         return err;
3976 }
3977
3978 static void niu_rxchan_intr(struct niu *np, struct rx_ring_info *rp,
3979                             int ldn)
3980 {
3981         struct rxdma_mailbox *mbox = rp->mbox;
3982         u64 stat_write, stat = le64_to_cpup(&mbox->rx_dma_ctl_stat);
3983
3984         stat_write = (RX_DMA_CTL_STAT_RCRTHRES |
3985                       RX_DMA_CTL_STAT_RCRTO);
3986         nw64(RX_DMA_CTL_STAT(rp->rx_channel), stat_write);
3987
3988         niudbg(INTR, "%s: rxchan_intr stat[%llx]\n",
3989                np->dev->name, (unsigned long long) stat);
3990 }
3991
3992 static void niu_txchan_intr(struct niu *np, struct tx_ring_info *rp,
3993                             int ldn)
3994 {
3995         rp->tx_cs = nr64(TX_CS(rp->tx_channel));
3996
3997         niudbg(INTR, "%s: txchan_intr cs[%llx]\n",
3998                np->dev->name, (unsigned long long) rp->tx_cs);
3999 }
4000
4001 static void __niu_fastpath_interrupt(struct niu *np, int ldg, u64 v0)
4002 {
4003         struct niu_parent *parent = np->parent;
4004         u32 rx_vec, tx_vec;
4005         int i;
4006
4007         tx_vec = (v0 >> 32);
4008         rx_vec = (v0 & 0xffffffff);
4009
4010         for (i = 0; i < np->num_rx_rings; i++) {
4011                 struct rx_ring_info *rp = &np->rx_rings[i];
4012                 int ldn = LDN_RXDMA(rp->rx_channel);
4013
4014                 if (parent->ldg_map[ldn] != ldg)
4015                         continue;
4016
4017                 nw64(LD_IM0(ldn), LD_IM0_MASK);
4018                 if (rx_vec & (1 << rp->rx_channel))
4019                         niu_rxchan_intr(np, rp, ldn);
4020         }
4021
4022         for (i = 0; i < np->num_tx_rings; i++) {
4023                 struct tx_ring_info *rp = &np->tx_rings[i];
4024                 int ldn = LDN_TXDMA(rp->tx_channel);
4025
4026                 if (parent->ldg_map[ldn] != ldg)
4027                         continue;
4028
4029                 nw64(LD_IM0(ldn), LD_IM0_MASK);
4030                 if (tx_vec & (1 << rp->tx_channel))
4031                         niu_txchan_intr(np, rp, ldn);
4032         }
4033 }
4034
4035 static void niu_schedule_napi(struct niu *np, struct niu_ldg *lp,
4036                               u64 v0, u64 v1, u64 v2)
4037 {
4038         if (likely(netif_rx_schedule_prep(np->dev, &lp->napi))) {
4039                 lp->v0 = v0;
4040                 lp->v1 = v1;
4041                 lp->v2 = v2;
4042                 __niu_fastpath_interrupt(np, lp->ldg_num, v0);
4043                 __netif_rx_schedule(np->dev, &lp->napi);
4044         }
4045 }
4046
4047 static irqreturn_t niu_interrupt(int irq, void *dev_id)
4048 {
4049         struct niu_ldg *lp = dev_id;
4050         struct niu *np = lp->np;
4051         int ldg = lp->ldg_num;
4052         unsigned long flags;
4053         u64 v0, v1, v2;
4054
4055         if (netif_msg_intr(np))
4056                 printk(KERN_DEBUG PFX "niu_interrupt() ldg[%p](%d) ",
4057                        lp, ldg);
4058
4059         spin_lock_irqsave(&np->lock, flags);
4060
4061         v0 = nr64(LDSV0(ldg));
4062         v1 = nr64(LDSV1(ldg));
4063         v2 = nr64(LDSV2(ldg));
4064
4065         if (netif_msg_intr(np))
4066                 printk("v0[%llx] v1[%llx] v2[%llx]\n",
4067                        (unsigned long long) v0,
4068                        (unsigned long long) v1,
4069                        (unsigned long long) v2);
4070
4071         if (unlikely(!v0 && !v1 && !v2)) {
4072                 spin_unlock_irqrestore(&np->lock, flags);
4073                 return IRQ_NONE;
4074         }
4075
4076         if (unlikely((v0 & ((u64)1 << LDN_MIF)) || v1 || v2)) {
4077                 int err = niu_slowpath_interrupt(np, lp, v0, v1, v2);
4078                 if (err)
4079                         goto out;
4080         }
4081         if (likely(v0 & ~((u64)1 << LDN_MIF)))
4082                 niu_schedule_napi(np, lp, v0, v1, v2);
4083         else
4084                 niu_ldg_rearm(np, lp, 1);
4085 out:
4086         spin_unlock_irqrestore(&np->lock, flags);
4087
4088         return IRQ_HANDLED;
4089 }
4090
4091 static void niu_free_rx_ring_info(struct niu *np, struct rx_ring_info *rp)
4092 {
4093         if (rp->mbox) {
4094                 np->ops->free_coherent(np->device,
4095                                        sizeof(struct rxdma_mailbox),
4096                                        rp->mbox, rp->mbox_dma);
4097                 rp->mbox = NULL;
4098         }
4099         if (rp->rcr) {
4100                 np->ops->free_coherent(np->device,
4101                                        MAX_RCR_RING_SIZE * sizeof(__le64),
4102                                        rp->rcr, rp->rcr_dma);
4103                 rp->rcr = NULL;
4104                 rp->rcr_table_size = 0;
4105                 rp->rcr_index = 0;
4106         }
4107         if (rp->rbr) {
4108                 niu_rbr_free(np, rp);
4109
4110                 np->ops->free_coherent(np->device,
4111                                        MAX_RBR_RING_SIZE * sizeof(__le32),
4112                                        rp->rbr, rp->rbr_dma);
4113                 rp->rbr = NULL;
4114                 rp->rbr_table_size = 0;
4115                 rp->rbr_index = 0;
4116         }
4117         kfree(rp->rxhash);
4118         rp->rxhash = NULL;
4119 }
4120
4121 static void niu_free_tx_ring_info(struct niu *np, struct tx_ring_info *rp)
4122 {
4123         if (rp->mbox) {
4124                 np->ops->free_coherent(np->device,
4125                                        sizeof(struct txdma_mailbox),
4126                                        rp->mbox, rp->mbox_dma);
4127                 rp->mbox = NULL;
4128         }
4129         if (rp->descr) {
4130                 int i;
4131
4132                 for (i = 0; i < MAX_TX_RING_SIZE; i++) {
4133                         if (rp->tx_buffs[i].skb)
4134                                 (void) release_tx_packet(np, rp, i);
4135                 }
4136
4137                 np->ops->free_coherent(np->device,
4138                                        MAX_TX_RING_SIZE * sizeof(__le64),
4139                                        rp->descr, rp->descr_dma);
4140                 rp->descr = NULL;
4141                 rp->pending = 0;
4142                 rp->prod = 0;
4143                 rp->cons = 0;
4144                 rp->wrap_bit = 0;
4145         }
4146 }
4147
4148 static void niu_free_channels(struct niu *np)
4149 {
4150         int i;
4151
4152         if (np->rx_rings) {
4153                 for (i = 0; i < np->num_rx_rings; i++) {
4154                         struct rx_ring_info *rp = &np->rx_rings[i];
4155
4156                         niu_free_rx_ring_info(np, rp);
4157                 }
4158                 kfree(np->rx_rings);
4159                 np->rx_rings = NULL;
4160                 np->num_rx_rings = 0;
4161         }
4162
4163         if (np->tx_rings) {
4164                 for (i = 0; i < np->num_tx_rings; i++) {
4165                         struct tx_ring_info *rp = &np->tx_rings[i];
4166
4167                         niu_free_tx_ring_info(np, rp);
4168                 }
4169                 kfree(np->tx_rings);
4170                 np->tx_rings = NULL;
4171                 np->num_tx_rings = 0;
4172         }
4173 }
4174
4175 static int niu_alloc_rx_ring_info(struct niu *np,
4176                                   struct rx_ring_info *rp)
4177 {
4178         BUILD_BUG_ON(sizeof(struct rxdma_mailbox) != 64);
4179
4180         rp->rxhash = kzalloc(MAX_RBR_RING_SIZE * sizeof(struct page *),
4181                              GFP_KERNEL);
4182         if (!rp->rxhash)
4183                 return -ENOMEM;
4184
4185         rp->mbox = np->ops->alloc_coherent(np->device,
4186                                            sizeof(struct rxdma_mailbox),
4187                                            &rp->mbox_dma, GFP_KERNEL);
4188         if (!rp->mbox)
4189                 return -ENOMEM;
4190         if ((unsigned long)rp->mbox & (64UL - 1)) {
4191                 dev_err(np->device, PFX "%s: Coherent alloc gives misaligned "
4192                         "RXDMA mailbox %p\n", np->dev->name, rp->mbox);
4193                 return -EINVAL;
4194         }
4195
4196         rp->rcr = np->ops->alloc_coherent(np->device,
4197                                           MAX_RCR_RING_SIZE * sizeof(__le64),
4198                                           &rp->rcr_dma, GFP_KERNEL);
4199         if (!rp->rcr)
4200                 return -ENOMEM;
4201         if ((unsigned long)rp->rcr & (64UL - 1)) {
4202                 dev_err(np->device, PFX "%s: Coherent alloc gives misaligned "
4203                         "RXDMA RCR table %p\n", np->dev->name, rp->rcr);
4204                 return -EINVAL;
4205         }
4206         rp->rcr_table_size = MAX_RCR_RING_SIZE;
4207         rp->rcr_index = 0;
4208
4209         rp->rbr = np->ops->alloc_coherent(np->device,
4210                                           MAX_RBR_RING_SIZE * sizeof(__le32),
4211                                           &rp->rbr_dma, GFP_KERNEL);
4212         if (!rp->rbr)
4213                 return -ENOMEM;
4214         if ((unsigned long)rp->rbr & (64UL - 1)) {
4215                 dev_err(np->device, PFX "%s: Coherent alloc gives misaligned "
4216                         "RXDMA RBR table %p\n", np->dev->name, rp->rbr);
4217                 return -EINVAL;
4218         }
4219         rp->rbr_table_size = MAX_RBR_RING_SIZE;
4220         rp->rbr_index = 0;
4221         rp->rbr_pending = 0;
4222
4223         return 0;
4224 }
4225
4226 static void niu_set_max_burst(struct niu *np, struct tx_ring_info *rp)
4227 {
4228         int mtu = np->dev->mtu;
4229
4230         /* These values are recommended by the HW designers for fair
4231          * utilization of DRR amongst the rings.
4232          */
4233         rp->max_burst = mtu + 32;
4234         if (rp->max_burst > 4096)
4235                 rp->max_burst = 4096;
4236 }
4237
4238 static int niu_alloc_tx_ring_info(struct niu *np,
4239                                   struct tx_ring_info *rp)
4240 {
4241         BUILD_BUG_ON(sizeof(struct txdma_mailbox) != 64);
4242
4243         rp->mbox = np->ops->alloc_coherent(np->device,
4244                                            sizeof(struct txdma_mailbox),
4245                                            &rp->mbox_dma, GFP_KERNEL);
4246         if (!rp->mbox)
4247                 return -ENOMEM;
4248         if ((unsigned long)rp->mbox & (64UL - 1)) {
4249                 dev_err(np->device, PFX "%s: Coherent alloc gives misaligned "
4250                         "TXDMA mailbox %p\n", np->dev->name, rp->mbox);
4251                 return -EINVAL;
4252         }
4253
4254         rp->descr = np->ops->alloc_coherent(np->device,
4255                                             MAX_TX_RING_SIZE * sizeof(__le64),
4256                                             &rp->descr_dma, GFP_KERNEL);
4257         if (!rp->descr)
4258                 return -ENOMEM;
4259         if ((unsigned long)rp->descr & (64UL - 1)) {
4260                 dev_err(np->device, PFX "%s: Coherent alloc gives misaligned "
4261                         "TXDMA descr table %p\n", np->dev->name, rp->descr);
4262                 return -EINVAL;
4263         }
4264
4265         rp->pending = MAX_TX_RING_SIZE;
4266         rp->prod = 0;
4267         rp->cons = 0;
4268         rp->wrap_bit = 0;
4269
4270         /* XXX make these configurable... XXX */
4271         rp->mark_freq = rp->pending / 4;
4272
4273         niu_set_max_burst(np, rp);
4274
4275         return 0;
4276 }
4277
4278 static void niu_size_rbr(struct niu *np, struct rx_ring_info *rp)
4279 {
4280         u16 bss;
4281
4282         bss = min(PAGE_SHIFT, 15);
4283
4284         rp->rbr_block_size = 1 << bss;
4285         rp->rbr_blocks_per_page = 1 << (PAGE_SHIFT-bss);
4286
4287         rp->rbr_sizes[0] = 256;
4288         rp->rbr_sizes[1] = 1024;
4289         if (np->dev->mtu > ETH_DATA_LEN) {
4290                 switch (PAGE_SIZE) {
4291                 case 4 * 1024:
4292                         rp->rbr_sizes[2] = 4096;
4293                         break;
4294
4295                 default:
4296                         rp->rbr_sizes[2] = 8192;
4297                         break;
4298                 }
4299         } else {
4300                 rp->rbr_sizes[2] = 2048;
4301         }
4302         rp->rbr_sizes[3] = rp->rbr_block_size;
4303 }
4304
4305 static int niu_alloc_channels(struct niu *np)
4306 {
4307         struct niu_parent *parent = np->parent;
4308         int first_rx_channel, first_tx_channel;
4309         int i, port, err;
4310
4311         port = np->port;
4312         first_rx_channel = first_tx_channel = 0;
4313         for (i = 0; i < port; i++) {
4314                 first_rx_channel += parent->rxchan_per_port[i];
4315                 first_tx_channel += parent->txchan_per_port[i];
4316         }
4317
4318         np->num_rx_rings = parent->rxchan_per_port[port];
4319         np->num_tx_rings = parent->txchan_per_port[port];
4320
4321         np->dev->real_num_tx_queues = np->num_tx_rings;
4322
4323         np->rx_rings = kzalloc(np->num_rx_rings * sizeof(struct rx_ring_info),
4324                                GFP_KERNEL);
4325         err = -ENOMEM;
4326         if (!np->rx_rings)
4327                 goto out_err;
4328
4329         for (i = 0; i < np->num_rx_rings; i++) {
4330                 struct rx_ring_info *rp = &np->rx_rings[i];
4331
4332                 rp->np = np;
4333                 rp->rx_channel = first_rx_channel + i;
4334
4335                 err = niu_alloc_rx_ring_info(np, rp);
4336                 if (err)
4337                         goto out_err;
4338
4339                 niu_size_rbr(np, rp);
4340
4341                 /* XXX better defaults, configurable, etc... XXX */
4342                 rp->nonsyn_window = 64;
4343                 rp->nonsyn_threshold = rp->rcr_table_size - 64;
4344                 rp->syn_window = 64;
4345                 rp->syn_threshold = rp->rcr_table_size - 64;
4346                 rp->rcr_pkt_threshold = 16;
4347                 rp->rcr_timeout = 8;
4348                 rp->rbr_kick_thresh = RBR_REFILL_MIN;
4349                 if (rp->rbr_kick_thresh < rp->rbr_blocks_per_page)
4350                         rp->rbr_kick_thresh = rp->rbr_blocks_per_page;
4351
4352                 err = niu_rbr_fill(np, rp, GFP_KERNEL);
4353                 if (err)
4354                         return err;
4355         }
4356
4357         np->tx_rings = kzalloc(np->num_tx_rings * sizeof(struct tx_ring_info),
4358                                GFP_KERNEL);
4359         err = -ENOMEM;
4360         if (!np->tx_rings)
4361                 goto out_err;
4362
4363         for (i = 0; i < np->num_tx_rings; i++) {
4364                 struct tx_ring_info *rp = &np->tx_rings[i];
4365
4366                 rp->np = np;
4367                 rp->tx_channel = first_tx_channel + i;
4368
4369                 err = niu_alloc_tx_ring_info(np, rp);
4370                 if (err)
4371                         goto out_err;
4372         }
4373
4374         return 0;
4375
4376 out_err:
4377         niu_free_channels(np);
4378         return err;
4379 }
4380
4381 static int niu_tx_cs_sng_poll(struct niu *np, int channel)
4382 {
4383         int limit = 1000;
4384
4385         while (--limit > 0) {
4386                 u64 val = nr64(TX_CS(channel));
4387                 if (val & TX_CS_SNG_STATE)
4388                         return 0;
4389         }
4390         return -ENODEV;
4391 }
4392
4393 static int niu_tx_channel_stop(struct niu *np, int channel)
4394 {
4395         u64 val = nr64(TX_CS(channel));
4396
4397         val |= TX_CS_STOP_N_GO;
4398         nw64(TX_CS(channel), val);
4399
4400         return niu_tx_cs_sng_poll(np, channel);
4401 }
4402
4403 static int niu_tx_cs_reset_poll(struct niu *np, int channel)
4404 {
4405         int limit = 1000;
4406
4407         while (--limit > 0) {
4408                 u64 val = nr64(TX_CS(channel));
4409                 if (!(val & TX_CS_RST))
4410                         return 0;
4411         }
4412         return -ENODEV;
4413 }
4414
4415 static int niu_tx_channel_reset(struct niu *np, int channel)
4416 {
4417         u64 val = nr64(TX_CS(channel));
4418         int err;
4419
4420         val |= TX_CS_RST;
4421         nw64(TX_CS(channel), val);
4422
4423         err = niu_tx_cs_reset_poll(np, channel);
4424         if (!err)
4425                 nw64(TX_RING_KICK(channel), 0);
4426
4427         return err;
4428 }
4429
4430 static int niu_tx_channel_lpage_init(struct niu *np, int channel)
4431 {
4432         u64 val;
4433
4434         nw64(TX_LOG_MASK1(channel), 0);
4435         nw64(TX_LOG_VAL1(channel), 0);
4436         nw64(TX_LOG_MASK2(channel), 0);
4437         nw64(TX_LOG_VAL2(channel), 0);
4438         nw64(TX_LOG_PAGE_RELO1(channel), 0);
4439         nw64(TX_LOG_PAGE_RELO2(channel), 0);
4440         nw64(TX_LOG_PAGE_HDL(channel), 0);
4441
4442         val  = (u64)np->port << TX_LOG_PAGE_VLD_FUNC_SHIFT;
4443         val |= (TX_LOG_PAGE_VLD_PAGE0 | TX_LOG_PAGE_VLD_PAGE1);
4444         nw64(TX_LOG_PAGE_VLD(channel), val);
4445
4446         /* XXX TXDMA 32bit mode? XXX */
4447
4448         return 0;
4449 }
4450
4451 static void niu_txc_enable_port(struct niu *np, int on)
4452 {
4453         unsigned long flags;
4454         u64 val, mask;
4455
4456         niu_lock_parent(np, flags);
4457         val = nr64(TXC_CONTROL);
4458         mask = (u64)1 << np->port;
4459         if (on) {
4460                 val |= TXC_CONTROL_ENABLE | mask;
4461         } else {
4462                 val &= ~mask;
4463                 if ((val & ~TXC_CONTROL_ENABLE) == 0)
4464                         val &= ~TXC_CONTROL_ENABLE;
4465         }
4466         nw64(TXC_CONTROL, val);
4467         niu_unlock_parent(np, flags);
4468 }
4469
4470 static void niu_txc_set_imask(struct niu *np, u64 imask)
4471 {
4472         unsigned long flags;
4473         u64 val;
4474
4475         niu_lock_parent(np, flags);
4476         val = nr64(TXC_INT_MASK);
4477         val &= ~TXC_INT_MASK_VAL(np->port);
4478         val |= (imask << TXC_INT_MASK_VAL_SHIFT(np->port));
4479         niu_unlock_parent(np, flags);
4480 }
4481
4482 static void niu_txc_port_dma_enable(struct niu *np, int on)
4483 {
4484         u64 val = 0;
4485
4486         if (on) {
4487                 int i;
4488
4489                 for (i = 0; i < np->num_tx_rings; i++)
4490                         val |= (1 << np->tx_rings[i].tx_channel);
4491         }
4492         nw64(TXC_PORT_DMA(np->port), val);
4493 }
4494
4495 static int niu_init_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
4496 {
4497         int err, channel = rp->tx_channel;
4498         u64 val, ring_len;
4499
4500         err = niu_tx_channel_stop(np, channel);
4501         if (err)
4502                 return err;
4503
4504         err = niu_tx_channel_reset(np, channel);
4505         if (err)
4506                 return err;
4507
4508         err = niu_tx_channel_lpage_init(np, channel);
4509         if (err)
4510                 return err;
4511
4512         nw64(TXC_DMA_MAX(channel), rp->max_burst);
4513         nw64(TX_ENT_MSK(channel), 0);
4514
4515         if (rp->descr_dma & ~(TX_RNG_CFIG_STADDR_BASE |
4516                               TX_RNG_CFIG_STADDR)) {
4517                 dev_err(np->device, PFX "%s: TX ring channel %d "
4518                         "DMA addr (%llx) is not aligned.\n",
4519                         np->dev->name, channel,
4520                         (unsigned long long) rp->descr_dma);
4521                 return -EINVAL;
4522         }
4523
4524         /* The length field in TX_RNG_CFIG is measured in 64-byte
4525          * blocks.  rp->pending is the number of TX descriptors in
4526          * our ring, 8 bytes each, thus we divide by 8 bytes more
4527          * to get the proper value the chip wants.
4528          */
4529         ring_len = (rp->pending / 8);
4530
4531         val = ((ring_len << TX_RNG_CFIG_LEN_SHIFT) |
4532                rp->descr_dma);
4533         nw64(TX_RNG_CFIG(channel), val);
4534
4535         if (((rp->mbox_dma >> 32) & ~TXDMA_MBH_MBADDR) ||
4536             ((u32)rp->mbox_dma & ~TXDMA_MBL_MBADDR)) {
4537                 dev_err(np->device, PFX "%s: TX ring channel %d "
4538                         "MBOX addr (%llx) is has illegal bits.\n",
4539                         np->dev->name, channel,
4540                         (unsigned long long) rp->mbox_dma);
4541                 return -EINVAL;
4542         }
4543         nw64(TXDMA_MBH(channel), rp->mbox_dma >> 32);
4544         nw64(TXDMA_MBL(channel), rp->mbox_dma & TXDMA_MBL_MBADDR);
4545
4546         nw64(TX_CS(channel), 0);
4547
4548         rp->last_pkt_cnt = 0;
4549
4550         return 0;
4551 }
4552
4553 static void niu_init_rdc_groups(struct niu *np)
4554 {
4555         struct niu_rdc_tables *tp = &np->parent->rdc_group_cfg[np->port];
4556         int i, first_table_num = tp->first_table_num;
4557
4558         for (i = 0; i < tp->num_tables; i++) {
4559                 struct rdc_table *tbl = &tp->tables[i];
4560                 int this_table = first_table_num + i;
4561                 int slot;
4562
4563                 for (slot = 0; slot < NIU_RDC_TABLE_SLOTS; slot++)
4564                         nw64(RDC_TBL(this_table, slot),
4565                              tbl->rxdma_channel[slot]);
4566         }
4567
4568         nw64(DEF_RDC(np->port), np->parent->rdc_default[np->port]);
4569 }
4570
4571 static void niu_init_drr_weight(struct niu *np)
4572 {
4573         int type = phy_decode(np->parent->port_phy, np->port);
4574         u64 val;
4575
4576         switch (type) {
4577         case PORT_TYPE_10G:
4578                 val = PT_DRR_WEIGHT_DEFAULT_10G;
4579                 break;
4580
4581         case PORT_TYPE_1G:
4582         default:
4583                 val = PT_DRR_WEIGHT_DEFAULT_1G;
4584                 break;
4585         }
4586         nw64(PT_DRR_WT(np->port), val);
4587 }
4588
4589 static int niu_init_hostinfo(struct niu *np)
4590 {
4591         struct niu_parent *parent = np->parent;
4592         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
4593         int i, err, num_alt = niu_num_alt_addr(np);
4594         int first_rdc_table = tp->first_table_num;
4595
4596         err = niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
4597         if (err)
4598                 return err;
4599
4600         err = niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
4601         if (err)
4602                 return err;
4603
4604         for (i = 0; i < num_alt; i++) {
4605                 err = niu_set_alt_mac_rdc_table(np, i, first_rdc_table, 1);
4606                 if (err)
4607                         return err;
4608         }
4609
4610         return 0;
4611 }
4612
4613 static int niu_rx_channel_reset(struct niu *np, int channel)
4614 {
4615         return niu_set_and_wait_clear(np, RXDMA_CFIG1(channel),
4616                                       RXDMA_CFIG1_RST, 1000, 10,
4617                                       "RXDMA_CFIG1");
4618 }
4619
4620 static int niu_rx_channel_lpage_init(struct niu *np, int channel)
4621 {
4622         u64 val;
4623
4624         nw64(RX_LOG_MASK1(channel), 0);
4625         nw64(RX_LOG_VAL1(channel), 0);
4626         nw64(RX_LOG_MASK2(channel), 0);
4627         nw64(RX_LOG_VAL2(channel), 0);
4628         nw64(RX_LOG_PAGE_RELO1(channel), 0);
4629         nw64(RX_LOG_PAGE_RELO2(channel), 0);
4630         nw64(RX_LOG_PAGE_HDL(channel), 0);
4631
4632         val  = (u64)np->port << RX_LOG_PAGE_VLD_FUNC_SHIFT;
4633         val |= (RX_LOG_PAGE_VLD_PAGE0 | RX_LOG_PAGE_VLD_PAGE1);
4634         nw64(RX_LOG_PAGE_VLD(channel), val);
4635
4636         return 0;
4637 }
4638
4639 static void niu_rx_channel_wred_init(struct niu *np, struct rx_ring_info *rp)
4640 {
4641         u64 val;
4642
4643         val = (((u64)rp->nonsyn_window << RDC_RED_PARA_WIN_SHIFT) |
4644                ((u64)rp->nonsyn_threshold << RDC_RED_PARA_THRE_SHIFT) |
4645                ((u64)rp->syn_window << RDC_RED_PARA_WIN_SYN_SHIFT) |
4646                ((u64)rp->syn_threshold << RDC_RED_PARA_THRE_SYN_SHIFT));
4647         nw64(RDC_RED_PARA(rp->rx_channel), val);
4648 }
4649
4650 static int niu_compute_rbr_cfig_b(struct rx_ring_info *rp, u64 *ret)
4651 {
4652         u64 val = 0;
4653
4654         switch (rp->rbr_block_size) {
4655         case 4 * 1024:
4656                 val |= (RBR_BLKSIZE_4K << RBR_CFIG_B_BLKSIZE_SHIFT);
4657                 break;
4658         case 8 * 1024:
4659                 val |= (RBR_BLKSIZE_8K << RBR_CFIG_B_BLKSIZE_SHIFT);
4660                 break;
4661         case 16 * 1024:
4662                 val |= (RBR_BLKSIZE_16K << RBR_CFIG_B_BLKSIZE_SHIFT);
4663                 break;
4664         case 32 * 1024:
4665                 val |= (RBR_BLKSIZE_32K << RBR_CFIG_B_BLKSIZE_SHIFT);
4666                 break;
4667         default:
4668                 return -EINVAL;
4669         }
4670         val |= RBR_CFIG_B_VLD2;
4671         switch (rp->rbr_sizes[2]) {
4672         case 2 * 1024:
4673                 val |= (RBR_BUFSZ2_2K << RBR_CFIG_B_BUFSZ2_SHIFT);
4674                 break;
4675         case 4 * 1024:
4676                 val |= (RBR_BUFSZ2_4K << RBR_CFIG_B_BUFSZ2_SHIFT);
4677                 break;
4678         case 8 * 1024:
4679                 val |= (RBR_BUFSZ2_8K << RBR_CFIG_B_BUFSZ2_SHIFT);
4680                 break;
4681         case 16 * 1024:
4682                 val |= (RBR_BUFSZ2_16K << RBR_CFIG_B_BUFSZ2_SHIFT);
4683                 break;
4684
4685         default:
4686                 return -EINVAL;
4687         }
4688         val |= RBR_CFIG_B_VLD1;
4689         switch (rp->rbr_sizes[1]) {
4690         case 1 * 1024:
4691                 val |= (RBR_BUFSZ1_1K << RBR_CFIG_B_BUFSZ1_SHIFT);
4692                 break;
4693         case 2 * 1024:
4694                 val |= (RBR_BUFSZ1_2K << RBR_CFIG_B_BUFSZ1_SHIFT);
4695                 break;
4696         case 4 * 1024:
4697                 val |= (RBR_BUFSZ1_4K << RBR_CFIG_B_BUFSZ1_SHIFT);
4698                 break;
4699         case 8 * 1024:
4700                 val |= (RBR_BUFSZ1_8K << RBR_CFIG_B_BUFSZ1_SHIFT);
4701                 break;
4702
4703         default:
4704                 return -EINVAL;
4705         }
4706         val |= RBR_CFIG_B_VLD0;
4707         switch (rp->rbr_sizes[0]) {
4708         case 256:
4709                 val |= (RBR_BUFSZ0_256 << RBR_CFIG_B_BUFSZ0_SHIFT);
4710                 break;
4711         case 512:
4712                 val |= (RBR_BUFSZ0_512 << RBR_CFIG_B_BUFSZ0_SHIFT);
4713                 break;
4714         case 1 * 1024:
4715                 val |= (RBR_BUFSZ0_1K << RBR_CFIG_B_BUFSZ0_SHIFT);
4716                 break;
4717         case 2 * 1024:
4718                 val |= (RBR_BUFSZ0_2K << RBR_CFIG_B_BUFSZ0_SHIFT);
4719                 break;
4720
4721         default:
4722                 return -EINVAL;
4723         }
4724
4725         *ret = val;
4726         return 0;
4727 }
4728
4729 static int niu_enable_rx_channel(struct niu *np, int channel, int on)
4730 {
4731         u64 val = nr64(RXDMA_CFIG1(channel));
4732         int limit;
4733
4734         if (on)
4735                 val |= RXDMA_CFIG1_EN;
4736         else
4737                 val &= ~RXDMA_CFIG1_EN;
4738         nw64(RXDMA_CFIG1(channel), val);
4739
4740         limit = 1000;
4741         while (--limit > 0) {
4742                 if (nr64(RXDMA_CFIG1(channel)) & RXDMA_CFIG1_QST)
4743                         break;
4744                 udelay(10);
4745         }
4746         if (limit <= 0)
4747                 return -ENODEV;
4748         return 0;
4749 }
4750
4751 static int niu_init_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
4752 {
4753         int err, channel = rp->rx_channel;
4754         u64 val;
4755
4756         err = niu_rx_channel_reset(np, channel);
4757         if (err)
4758                 return err;
4759
4760         err = niu_rx_channel_lpage_init(np, channel);
4761         if (err)
4762                 return err;
4763
4764         niu_rx_channel_wred_init(np, rp);
4765
4766         nw64(RX_DMA_ENT_MSK(channel), RX_DMA_ENT_MSK_RBR_EMPTY);
4767         nw64(RX_DMA_CTL_STAT(channel),
4768              (RX_DMA_CTL_STAT_MEX |
4769               RX_DMA_CTL_STAT_RCRTHRES |
4770               RX_DMA_CTL_STAT_RCRTO |
4771               RX_DMA_CTL_STAT_RBR_EMPTY));
4772         nw64(RXDMA_CFIG1(channel), rp->mbox_dma >> 32);
4773         nw64(RXDMA_CFIG2(channel), (rp->mbox_dma & 0x00000000ffffffc0));
4774         nw64(RBR_CFIG_A(channel),
4775              ((u64)rp->rbr_table_size << RBR_CFIG_A_LEN_SHIFT) |
4776              (rp->rbr_dma & (RBR_CFIG_A_STADDR_BASE | RBR_CFIG_A_STADDR)));
4777         err = niu_compute_rbr_cfig_b(rp, &val);
4778         if (err)
4779                 return err;
4780         nw64(RBR_CFIG_B(channel), val);
4781         nw64(RCRCFIG_A(channel),
4782              ((u64)rp->rcr_table_size << RCRCFIG_A_LEN_SHIFT) |
4783              (rp->rcr_dma & (RCRCFIG_A_STADDR_BASE | RCRCFIG_A_STADDR)));
4784         nw64(RCRCFIG_B(channel),
4785              ((u64)rp->rcr_pkt_threshold << RCRCFIG_B_PTHRES_SHIFT) |
4786              RCRCFIG_B_ENTOUT |
4787              ((u64)rp->rcr_timeout << RCRCFIG_B_TIMEOUT_SHIFT));
4788
4789         err = niu_enable_rx_channel(np, channel, 1);
4790         if (err)
4791                 return err;
4792
4793         nw64(RBR_KICK(channel), rp->rbr_index);
4794
4795         val = nr64(RX_DMA_CTL_STAT(channel));
4796         val |= RX_DMA_CTL_STAT_RBR_EMPTY;
4797         nw64(RX_DMA_CTL_STAT(channel), val);
4798
4799         return 0;
4800 }
4801
4802 static int niu_init_rx_channels(struct niu *np)
4803 {
4804         unsigned long flags;
4805         u64 seed = jiffies_64;
4806         int err, i;
4807
4808         niu_lock_parent(np, flags);
4809         nw64(RX_DMA_CK_DIV, np->parent->rxdma_clock_divider);
4810         nw64(RED_RAN_INIT, RED_RAN_INIT_OPMODE | (seed & RED_RAN_INIT_VAL));
4811         niu_unlock_parent(np, flags);
4812
4813         /* XXX RXDMA 32bit mode? XXX */
4814
4815         niu_init_rdc_groups(np);
4816         niu_init_drr_weight(np);
4817
4818         err = niu_init_hostinfo(np);
4819         if (err)
4820                 return err;
4821
4822         for (i = 0; i < np->num_rx_rings; i++) {
4823                 struct rx_ring_info *rp = &np->rx_rings[i];
4824
4825                 err = niu_init_one_rx_channel(np, rp);
4826                 if (err)
4827                         return err;
4828         }
4829
4830         return 0;
4831 }
4832
4833 static int niu_set_ip_frag_rule(struct niu *np)
4834 {
4835         struct niu_parent *parent = np->parent;
4836         struct niu_classifier *cp = &np->clas;
4837         struct niu_tcam_entry *tp;
4838         int index, err;
4839
4840         /* XXX fix this allocation scheme XXX */
4841         index = cp->tcam_index;
4842         tp = &parent->tcam[index];
4843
4844         /* Note that the noport bit is the same in both ipv4 and
4845          * ipv6 format TCAM entries.
4846          */
4847         memset(tp, 0, sizeof(*tp));
4848         tp->key[1] = TCAM_V4KEY1_NOPORT;
4849         tp->key_mask[1] = TCAM_V4KEY1_NOPORT;
4850         tp->assoc_data = (TCAM_ASSOCDATA_TRES_USE_OFFSET |
4851                           ((u64)0 << TCAM_ASSOCDATA_OFFSET_SHIFT));
4852         err = tcam_write(np, index, tp->key, tp->key_mask);
4853         if (err)
4854                 return err;
4855         err = tcam_assoc_write(np, index, tp->assoc_data);
4856         if (err)
4857                 return err;
4858
4859         return 0;
4860 }
4861
4862 static int niu_init_classifier_hw(struct niu *np)
4863 {
4864         struct niu_parent *parent = np->parent;
4865         struct niu_classifier *cp = &np->clas;
4866         int i, err;
4867
4868         nw64(H1POLY, cp->h1_init);
4869         nw64(H2POLY, cp->h2_init);
4870
4871         err = niu_init_hostinfo(np);
4872         if (err)
4873                 return err;
4874
4875         for (i = 0; i < ENET_VLAN_TBL_NUM_ENTRIES; i++) {
4876                 struct niu_vlan_rdc *vp = &cp->vlan_mappings[i];
4877
4878                 vlan_tbl_write(np, i, np->port,
4879                                vp->vlan_pref, vp->rdc_num);
4880         }
4881
4882         for (i = 0; i < cp->num_alt_mac_mappings; i++) {
4883                 struct niu_altmac_rdc *ap = &cp->alt_mac_mappings[i];
4884
4885                 err = niu_set_alt_mac_rdc_table(np, ap->alt_mac_num,
4886                                                 ap->rdc_num, ap->mac_pref);
4887                 if (err)
4888                         return err;
4889         }
4890
4891         for (i = CLASS_CODE_USER_PROG1; i <= CLASS_CODE_SCTP_IPV6; i++) {
4892                 int index = i - CLASS_CODE_USER_PROG1;
4893
4894                 err = niu_set_tcam_key(np, i, parent->tcam_key[index]);
4895                 if (err)
4896                         return err;
4897                 err = niu_set_flow_key(np, i, parent->flow_key[index]);
4898                 if (err)
4899                         return err;
4900         }
4901
4902         err = niu_set_ip_frag_rule(np);
4903         if (err)
4904                 return err;
4905
4906         tcam_enable(np, 1);
4907
4908         return 0;
4909 }
4910
4911 static int niu_zcp_write(struct niu *np, int index, u64 *data)
4912 {
4913         nw64(ZCP_RAM_DATA0, data[0]);
4914         nw64(ZCP_RAM_DATA1, data[1]);
4915         nw64(ZCP_RAM_DATA2, data[2]);
4916         nw64(ZCP_RAM_DATA3, data[3]);
4917         nw64(ZCP_RAM_DATA4, data[4]);
4918         nw64(ZCP_RAM_BE, ZCP_RAM_BE_VAL);
4919         nw64(ZCP_RAM_ACC,
4920              (ZCP_RAM_ACC_WRITE |
4921               (0 << ZCP_RAM_ACC_ZFCID_SHIFT) |
4922               (ZCP_RAM_SEL_CFIFO(np->port) << ZCP_RAM_ACC_RAM_SEL_SHIFT)));
4923
4924         return niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
4925                                    1000, 100);
4926 }
4927
4928 static int niu_zcp_read(struct niu *np, int index, u64 *data)
4929 {
4930         int err;
4931
4932         err = niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
4933                                   1000, 100);
4934         if (err) {
4935                 dev_err(np->device, PFX "%s: ZCP read busy won't clear, "
4936                         "ZCP_RAM_ACC[%llx]\n", np->dev->name,
4937                         (unsigned long long) nr64(ZCP_RAM_ACC));
4938                 return err;
4939         }
4940
4941         nw64(ZCP_RAM_ACC,
4942              (ZCP_RAM_ACC_READ |
4943               (0 << ZCP_RAM_ACC_ZFCID_SHIFT) |
4944               (ZCP_RAM_SEL_CFIFO(np->port) << ZCP_RAM_ACC_RAM_SEL_SHIFT)));
4945
4946         err = niu_wait_bits_clear(np, ZCP_RAM_ACC, ZCP_RAM_ACC_BUSY,
4947                                   1000, 100);
4948         if (err) {
4949                 dev_err(np->device, PFX "%s: ZCP read busy2 won't clear, "
4950                         "ZCP_RAM_ACC[%llx]\n", np->dev->name,
4951                         (unsigned long long) nr64(ZCP_RAM_ACC));
4952                 return err;
4953         }
4954
4955         data[0] = nr64(ZCP_RAM_DATA0);
4956         data[1] = nr64(ZCP_RAM_DATA1);
4957         data[2] = nr64(ZCP_RAM_DATA2);
4958         data[3] = nr64(ZCP_RAM_DATA3);
4959         data[4] = nr64(ZCP_RAM_DATA4);
4960
4961         return 0;
4962 }
4963
4964 static void niu_zcp_cfifo_reset(struct niu *np)
4965 {
4966         u64 val = nr64(RESET_CFIFO);
4967
4968         val |= RESET_CFIFO_RST(np->port);
4969         nw64(RESET_CFIFO, val);
4970         udelay(10);
4971
4972         val &= ~RESET_CFIFO_RST(np->port);
4973         nw64(RESET_CFIFO, val);
4974 }
4975
4976 static int niu_init_zcp(struct niu *np)
4977 {
4978         u64 data[5], rbuf[5];
4979         int i, max, err;
4980
4981         if (np->parent->plat_type != PLAT_TYPE_NIU) {
4982                 if (np->port == 0 || np->port == 1)
4983                         max = ATLAS_P0_P1_CFIFO_ENTRIES;
4984                 else
4985                         max = ATLAS_P2_P3_CFIFO_ENTRIES;
4986         } else
4987                 max = NIU_CFIFO_ENTRIES;
4988
4989         data[0] = 0;
4990         data[1] = 0;
4991         data[2] = 0;
4992         data[3] = 0;
4993         data[4] = 0;
4994
4995         for (i = 0; i < max; i++) {
4996                 err = niu_zcp_write(np, i, data);
4997                 if (err)
4998                         return err;
4999                 err = niu_zcp_read(np, i, rbuf);
5000                 if (err)
5001                         return err;
5002         }
5003
5004         niu_zcp_cfifo_reset(np);
5005         nw64(CFIFO_ECC(np->port), 0);
5006         nw64(ZCP_INT_STAT, ZCP_INT_STAT_ALL);
5007         (void) nr64(ZCP_INT_STAT);
5008         nw64(ZCP_INT_MASK, ZCP_INT_MASK_ALL);
5009
5010         return 0;
5011 }
5012
5013 static void niu_ipp_write(struct niu *np, int index, u64 *data)
5014 {
5015         u64 val = nr64_ipp(IPP_CFIG);
5016
5017         nw64_ipp(IPP_CFIG, val | IPP_CFIG_DFIFO_PIO_W);
5018         nw64_ipp(IPP_DFIFO_WR_PTR, index);
5019         nw64_ipp(IPP_DFIFO_WR0, data[0]);
5020         nw64_ipp(IPP_DFIFO_WR1, data[1]);
5021         nw64_ipp(IPP_DFIFO_WR2, data[2]);
5022         nw64_ipp(IPP_DFIFO_WR3, data[3]);
5023         nw64_ipp(IPP_DFIFO_WR4, data[4]);
5024         nw64_ipp(IPP_CFIG, val & ~IPP_CFIG_DFIFO_PIO_W);
5025 }
5026
5027 static void niu_ipp_read(struct niu *np, int index, u64 *data)
5028 {
5029         nw64_ipp(IPP_DFIFO_RD_PTR, index);
5030         data[0] = nr64_ipp(IPP_DFIFO_RD0);
5031         data[1] = nr64_ipp(IPP_DFIFO_RD1);
5032         data[2] = nr64_ipp(IPP_DFIFO_RD2);
5033         data[3] = nr64_ipp(IPP_DFIFO_RD3);
5034         data[4] = nr64_ipp(IPP_DFIFO_RD4);
5035 }
5036
5037 static int niu_ipp_reset(struct niu *np)
5038 {
5039         return niu_set_and_wait_clear_ipp(np, IPP_CFIG, IPP_CFIG_SOFT_RST,
5040                                           1000, 100, "IPP_CFIG");
5041 }
5042
5043 static int niu_init_ipp(struct niu *np)
5044 {
5045         u64 data[5], rbuf[5], val;
5046         int i, max, err;
5047
5048         if (np->parent->plat_type != PLAT_TYPE_NIU) {
5049                 if (np->port == 0 || np->port == 1)
5050                         max = ATLAS_P0_P1_DFIFO_ENTRIES;
5051                 else
5052                         max = ATLAS_P2_P3_DFIFO_ENTRIES;
5053         } else
5054                 max = NIU_DFIFO_ENTRIES;
5055
5056         data[0] = 0;
5057         data[1] = 0;
5058         data[2] = 0;
5059         data[3] = 0;
5060         data[4] = 0;
5061
5062         for (i = 0; i < max; i++) {
5063                 niu_ipp_write(np, i, data);
5064                 niu_ipp_read(np, i, rbuf);
5065         }
5066
5067         (void) nr64_ipp(IPP_INT_STAT);
5068         (void) nr64_ipp(IPP_INT_STAT);
5069
5070         err = niu_ipp_reset(np);
5071         if (err)
5072                 return err;
5073
5074         (void) nr64_ipp(IPP_PKT_DIS);
5075         (void) nr64_ipp(IPP_BAD_CS_CNT);
5076         (void) nr64_ipp(IPP_ECC);
5077
5078         (void) nr64_ipp(IPP_INT_STAT);
5079
5080         nw64_ipp(IPP_MSK, ~IPP_MSK_ALL);
5081
5082         val = nr64_ipp(IPP_CFIG);
5083         val &= ~IPP_CFIG_IP_MAX_PKT;
5084         val |= (IPP_CFIG_IPP_ENABLE |
5085                 IPP_CFIG_DFIFO_ECC_EN |
5086                 IPP_CFIG_DROP_BAD_CRC |
5087                 IPP_CFIG_CKSUM_EN |
5088                 (0x1ffff << IPP_CFIG_IP_MAX_PKT_SHIFT));
5089         nw64_ipp(IPP_CFIG, val);
5090
5091         return 0;
5092 }
5093
5094 static void niu_handle_led(struct niu *np, int status)
5095 {
5096         u64 val;
5097         val = nr64_mac(XMAC_CONFIG);
5098
5099         if ((np->flags & NIU_FLAGS_10G) != 0 &&
5100             (np->flags & NIU_FLAGS_FIBER) != 0) {
5101                 if (status) {
5102                         val |= XMAC_CONFIG_LED_POLARITY;
5103                         val &= ~XMAC_CONFIG_FORCE_LED_ON;
5104                 } else {
5105                         val |= XMAC_CONFIG_FORCE_LED_ON;
5106                         val &= ~XMAC_CONFIG_LED_POLARITY;
5107                 }
5108         }
5109
5110         nw64_mac(XMAC_CONFIG, val);
5111 }
5112
5113 static void niu_init_xif_xmac(struct niu *np)
5114 {
5115         struct niu_link_config *lp = &np->link_config;
5116         u64 val;
5117
5118         if (np->flags & NIU_FLAGS_XCVR_SERDES) {
5119                 val = nr64(MIF_CONFIG);
5120                 val |= MIF_CONFIG_ATCA_GE;
5121                 nw64(MIF_CONFIG, val);
5122         }
5123
5124         val = nr64_mac(XMAC_CONFIG);
5125         val &= ~XMAC_CONFIG_SEL_POR_CLK_SRC;
5126
5127         val |= XMAC_CONFIG_TX_OUTPUT_EN;
5128
5129         if (lp->loopback_mode == LOOPBACK_MAC) {
5130                 val &= ~XMAC_CONFIG_SEL_POR_CLK_SRC;
5131                 val |= XMAC_CONFIG_LOOPBACK;
5132         } else {
5133                 val &= ~XMAC_CONFIG_LOOPBACK;
5134         }
5135
5136         if (np->flags & NIU_FLAGS_10G) {
5137                 val &= ~XMAC_CONFIG_LFS_DISABLE;
5138         } else {
5139                 val |= XMAC_CONFIG_LFS_DISABLE;
5140                 if (!(np->flags & NIU_FLAGS_FIBER) &&
5141                     !(np->flags & NIU_FLAGS_XCVR_SERDES))
5142                         val |= XMAC_CONFIG_1G_PCS_BYPASS;
5143                 else
5144                         val &= ~XMAC_CONFIG_1G_PCS_BYPASS;
5145         }
5146
5147         val &= ~XMAC_CONFIG_10G_XPCS_BYPASS;
5148
5149         if (lp->active_speed == SPEED_100)
5150                 val |= XMAC_CONFIG_SEL_CLK_25MHZ;
5151         else
5152                 val &= ~XMAC_CONFIG_SEL_CLK_25MHZ;
5153
5154         nw64_mac(XMAC_CONFIG, val);
5155
5156         val = nr64_mac(XMAC_CONFIG);
5157         val &= ~XMAC_CONFIG_MODE_MASK;
5158         if (np->flags & NIU_FLAGS_10G) {
5159                 val |= XMAC_CONFIG_MODE_XGMII;
5160         } else {
5161                 if (lp->active_speed == SPEED_100)
5162                         val |= XMAC_CONFIG_MODE_MII;
5163                 else
5164                         val |= XMAC_CONFIG_MODE_GMII;
5165         }
5166
5167         nw64_mac(XMAC_CONFIG, val);
5168 }
5169
5170 static void niu_init_xif_bmac(struct niu *np)
5171 {
5172         struct niu_link_config *lp = &np->link_config;
5173         u64 val;
5174
5175         val = BMAC_XIF_CONFIG_TX_OUTPUT_EN;
5176
5177         if (lp->loopback_mode == LOOPBACK_MAC)
5178                 val |= BMAC_XIF_CONFIG_MII_LOOPBACK;
5179         else
5180                 val &= ~BMAC_XIF_CONFIG_MII_LOOPBACK;
5181
5182         if (lp->active_speed == SPEED_1000)
5183                 val |= BMAC_XIF_CONFIG_GMII_MODE;
5184         else
5185                 val &= ~BMAC_XIF_CONFIG_GMII_MODE;
5186
5187         val &= ~(BMAC_XIF_CONFIG_LINK_LED |
5188                  BMAC_XIF_CONFIG_LED_POLARITY);
5189
5190         if (!(np->flags & NIU_FLAGS_10G) &&
5191             !(np->flags & NIU_FLAGS_FIBER) &&
5192             lp->active_speed == SPEED_100)
5193                 val |= BMAC_XIF_CONFIG_25MHZ_CLOCK;
5194         else
5195                 val &= ~BMAC_XIF_CONFIG_25MHZ_CLOCK;
5196
5197         nw64_mac(BMAC_XIF_CONFIG, val);
5198 }
5199
5200 static void niu_init_xif(struct niu *np)
5201 {
5202         if (np->flags & NIU_FLAGS_XMAC)
5203                 niu_init_xif_xmac(np);
5204         else
5205                 niu_init_xif_bmac(np);
5206 }
5207
5208 static void niu_pcs_mii_reset(struct niu *np)
5209 {
5210         int limit = 1000;
5211         u64 val = nr64_pcs(PCS_MII_CTL);
5212         val |= PCS_MII_CTL_RST;
5213         nw64_pcs(PCS_MII_CTL, val);
5214         while ((--limit >= 0) && (val & PCS_MII_CTL_RST)) {
5215                 udelay(100);
5216                 val = nr64_pcs(PCS_MII_CTL);
5217         }
5218 }
5219
5220 static void niu_xpcs_reset(struct niu *np)
5221 {
5222         int limit = 1000;
5223         u64 val = nr64_xpcs(XPCS_CONTROL1);
5224         val |= XPCS_CONTROL1_RESET;
5225         nw64_xpcs(XPCS_CONTROL1, val);
5226         while ((--limit >= 0) && (val & XPCS_CONTROL1_RESET)) {
5227                 udelay(100);
5228                 val = nr64_xpcs(XPCS_CONTROL1);
5229         }
5230 }
5231
5232 static int niu_init_pcs(struct niu *np)
5233 {
5234         struct niu_link_config *lp = &np->link_config;
5235         u64 val;
5236
5237         switch (np->flags & (NIU_FLAGS_10G |
5238                              NIU_FLAGS_FIBER |
5239                              NIU_FLAGS_XCVR_SERDES)) {
5240         case NIU_FLAGS_FIBER:
5241                 /* 1G fiber */
5242                 nw64_pcs(PCS_CONF, PCS_CONF_MASK | PCS_CONF_ENABLE);
5243                 nw64_pcs(PCS_DPATH_MODE, 0);
5244                 niu_pcs_mii_reset(np);
5245                 break;
5246
5247         case NIU_FLAGS_10G:
5248         case NIU_FLAGS_10G | NIU_FLAGS_FIBER:
5249         case NIU_FLAGS_10G | NIU_FLAGS_XCVR_SERDES:
5250                 /* 10G SERDES */
5251                 if (!(np->flags & NIU_FLAGS_XMAC))
5252                         return -EINVAL;
5253
5254                 /* 10G copper or fiber */
5255                 val = nr64_mac(XMAC_CONFIG);
5256                 val &= ~XMAC_CONFIG_10G_XPCS_BYPASS;
5257                 nw64_mac(XMAC_CONFIG, val);
5258
5259                 niu_xpcs_reset(np);
5260
5261                 val = nr64_xpcs(XPCS_CONTROL1);
5262                 if (lp->loopback_mode == LOOPBACK_PHY)
5263                         val |= XPCS_CONTROL1_LOOPBACK;
5264                 else
5265                         val &= ~XPCS_CONTROL1_LOOPBACK;
5266                 nw64_xpcs(XPCS_CONTROL1, val);
5267
5268                 nw64_xpcs(XPCS_DESKEW_ERR_CNT, 0);
5269                 (void) nr64_xpcs(XPCS_SYMERR_CNT01);
5270                 (void) nr64_xpcs(XPCS_SYMERR_CNT23);
5271                 break;
5272
5273
5274         case NIU_FLAGS_XCVR_SERDES:
5275                 /* 1G SERDES */
5276                 niu_pcs_mii_reset(np);
5277                 nw64_pcs(PCS_CONF, PCS_CONF_MASK | PCS_CONF_ENABLE);
5278                 nw64_pcs(PCS_DPATH_MODE, 0);
5279                 break;
5280
5281         case 0:
5282                 /* 1G copper */
5283         case NIU_FLAGS_XCVR_SERDES | NIU_FLAGS_FIBER:
5284                 /* 1G RGMII FIBER */
5285                 nw64_pcs(PCS_DPATH_MODE, PCS_DPATH_MODE_MII);
5286                 niu_pcs_mii_reset(np);
5287                 break;
5288
5289         default:
5290                 return -EINVAL;
5291         }
5292
5293         return 0;
5294 }
5295
5296 static int niu_reset_tx_xmac(struct niu *np)
5297 {
5298         return niu_set_and_wait_clear_mac(np, XTXMAC_SW_RST,
5299                                           (XTXMAC_SW_RST_REG_RS |
5300                                            XTXMAC_SW_RST_SOFT_RST),
5301                                           1000, 100, "XTXMAC_SW_RST");
5302 }
5303
5304 static int niu_reset_tx_bmac(struct niu *np)
5305 {
5306         int limit;
5307
5308         nw64_mac(BTXMAC_SW_RST, BTXMAC_SW_RST_RESET);
5309         limit = 1000;
5310         while (--limit >= 0) {
5311                 if (!(nr64_mac(BTXMAC_SW_RST) & BTXMAC_SW_RST_RESET))
5312                         break;
5313                 udelay(100);
5314         }
5315         if (limit < 0) {
5316                 dev_err(np->device, PFX "Port %u TX BMAC would not reset, "
5317                         "BTXMAC_SW_RST[%llx]\n",
5318                         np->port,
5319                         (unsigned long long) nr64_mac(BTXMAC_SW_RST));
5320                 return -ENODEV;
5321         }
5322
5323         return 0;
5324 }
5325
5326 static int niu_reset_tx_mac(struct niu *np)
5327 {
5328         if (np->flags & NIU_FLAGS_XMAC)
5329                 return niu_reset_tx_xmac(np);
5330         else
5331                 return niu_reset_tx_bmac(np);
5332 }
5333
5334 static void niu_init_tx_xmac(struct niu *np, u64 min, u64 max)
5335 {
5336         u64 val;
5337
5338         val = nr64_mac(XMAC_MIN);
5339         val &= ~(XMAC_MIN_TX_MIN_PKT_SIZE |
5340                  XMAC_MIN_RX_MIN_PKT_SIZE);
5341         val |= (min << XMAC_MIN_RX_MIN_PKT_SIZE_SHFT);
5342         val |= (min << XMAC_MIN_TX_MIN_PKT_SIZE_SHFT);
5343         nw64_mac(XMAC_MIN, val);
5344
5345         nw64_mac(XMAC_MAX, max);
5346
5347         nw64_mac(XTXMAC_STAT_MSK, ~(u64)0);
5348
5349         val = nr64_mac(XMAC_IPG);
5350         if (np->flags & NIU_FLAGS_10G) {
5351                 val &= ~XMAC_IPG_IPG_XGMII;
5352                 val |= (IPG_12_15_XGMII << XMAC_IPG_IPG_XGMII_SHIFT);
5353         } else {
5354                 val &= ~XMAC_IPG_IPG_MII_GMII;
5355                 val |= (IPG_12_MII_GMII << XMAC_IPG_IPG_MII_GMII_SHIFT);
5356         }
5357         nw64_mac(XMAC_IPG, val);
5358
5359         val = nr64_mac(XMAC_CONFIG);
5360         val &= ~(XMAC_CONFIG_ALWAYS_NO_CRC |
5361                  XMAC_CONFIG_STRETCH_MODE |
5362                  XMAC_CONFIG_VAR_MIN_IPG_EN |
5363                  XMAC_CONFIG_TX_ENABLE);
5364         nw64_mac(XMAC_CONFIG, val);
5365
5366         nw64_mac(TXMAC_FRM_CNT, 0);
5367         nw64_mac(TXMAC_BYTE_CNT, 0);
5368 }
5369
5370 static void niu_init_tx_bmac(struct niu *np, u64 min, u64 max)
5371 {
5372         u64 val;
5373
5374         nw64_mac(BMAC_MIN_FRAME, min);
5375         nw64_mac(BMAC_MAX_FRAME, max);
5376
5377         nw64_mac(BTXMAC_STATUS_MASK, ~(u64)0);
5378         nw64_mac(BMAC_CTRL_TYPE, 0x8808);
5379         nw64_mac(BMAC_PREAMBLE_SIZE, 7);
5380
5381         val = nr64_mac(BTXMAC_CONFIG);
5382         val &= ~(BTXMAC_CONFIG_FCS_DISABLE |
5383                  BTXMAC_CONFIG_ENABLE);
5384         nw64_mac(BTXMAC_CONFIG, val);
5385 }
5386
5387 static void niu_init_tx_mac(struct niu *np)
5388 {
5389         u64 min, max;
5390
5391         min = 64;
5392         if (np->dev->mtu > ETH_DATA_LEN)
5393                 max = 9216;
5394         else
5395                 max = 1522;
5396
5397         /* The XMAC_MIN register only accepts values for TX min which
5398          * have the low 3 bits cleared.
5399          */
5400         BUILD_BUG_ON(min & 0x7);
5401
5402         if (np->flags & NIU_FLAGS_XMAC)
5403                 niu_init_tx_xmac(np, min, max);
5404         else
5405                 niu_init_tx_bmac(np, min, max);
5406 }
5407
5408 static int niu_reset_rx_xmac(struct niu *np)
5409 {
5410         int limit;
5411
5412         nw64_mac(XRXMAC_SW_RST,
5413                  XRXMAC_SW_RST_REG_RS | XRXMAC_SW_RST_SOFT_RST);
5414         limit = 1000;
5415         while (--limit >= 0) {
5416                 if (!(nr64_mac(XRXMAC_SW_RST) & (XRXMAC_SW_RST_REG_RS |
5417                                                  XRXMAC_SW_RST_SOFT_RST)))
5418                     break;
5419                 udelay(100);
5420         }
5421         if (limit < 0) {
5422                 dev_err(np->device, PFX "Port %u RX XMAC would not reset, "
5423                         "XRXMAC_SW_RST[%llx]\n",
5424                         np->port,
5425                         (unsigned long long) nr64_mac(XRXMAC_SW_RST));
5426                 return -ENODEV;
5427         }
5428
5429         return 0;
5430 }
5431
5432 static int niu_reset_rx_bmac(struct niu *np)
5433 {
5434         int limit;
5435
5436         nw64_mac(BRXMAC_SW_RST, BRXMAC_SW_RST_RESET);
5437         limit = 1000;
5438         while (--limit >= 0) {
5439                 if (!(nr64_mac(BRXMAC_SW_RST) & BRXMAC_SW_RST_RESET))
5440                         break;
5441                 udelay(100);
5442         }
5443         if (limit < 0) {
5444                 dev_err(np->device, PFX "Port %u RX BMAC would not reset, "
5445                         "BRXMAC_SW_RST[%llx]\n",
5446                         np->port,
5447                         (unsigned long long) nr64_mac(BRXMAC_SW_RST));
5448                 return -ENODEV;
5449         }
5450
5451         return 0;
5452 }
5453
5454 static int niu_reset_rx_mac(struct niu *np)
5455 {
5456         if (np->flags & NIU_FLAGS_XMAC)
5457                 return niu_reset_rx_xmac(np);
5458         else
5459                 return niu_reset_rx_bmac(np);
5460 }
5461
5462 static void niu_init_rx_xmac(struct niu *np)
5463 {
5464         struct niu_parent *parent = np->parent;
5465         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
5466         int first_rdc_table = tp->first_table_num;
5467         unsigned long i;
5468         u64 val;
5469
5470         nw64_mac(XMAC_ADD_FILT0, 0);
5471         nw64_mac(XMAC_ADD_FILT1, 0);
5472         nw64_mac(XMAC_ADD_FILT2, 0);
5473         nw64_mac(XMAC_ADD_FILT12_MASK, 0);
5474         nw64_mac(XMAC_ADD_FILT00_MASK, 0);
5475         for (i = 0; i < MAC_NUM_HASH; i++)
5476                 nw64_mac(XMAC_HASH_TBL(i), 0);
5477         nw64_mac(XRXMAC_STAT_MSK, ~(u64)0);
5478         niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
5479         niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
5480
5481         val = nr64_mac(XMAC_CONFIG);
5482         val &= ~(XMAC_CONFIG_RX_MAC_ENABLE |
5483                  XMAC_CONFIG_PROMISCUOUS |
5484                  XMAC_CONFIG_PROMISC_GROUP |
5485                  XMAC_CONFIG_ERR_CHK_DIS |
5486                  XMAC_CONFIG_RX_CRC_CHK_DIS |
5487                  XMAC_CONFIG_RESERVED_MULTICAST |
5488                  XMAC_CONFIG_RX_CODEV_CHK_DIS |
5489                  XMAC_CONFIG_ADDR_FILTER_EN |
5490                  XMAC_CONFIG_RCV_PAUSE_ENABLE |
5491                  XMAC_CONFIG_STRIP_CRC |
5492                  XMAC_CONFIG_PASS_FLOW_CTRL |
5493                  XMAC_CONFIG_MAC2IPP_PKT_CNT_EN);
5494         val |= (XMAC_CONFIG_HASH_FILTER_EN);
5495         nw64_mac(XMAC_CONFIG, val);
5496
5497         nw64_mac(RXMAC_BT_CNT, 0);
5498         nw64_mac(RXMAC_BC_FRM_CNT, 0);
5499         nw64_mac(RXMAC_MC_FRM_CNT, 0);
5500         nw64_mac(RXMAC_FRAG_CNT, 0);
5501         nw64_mac(RXMAC_HIST_CNT1, 0);
5502         nw64_mac(RXMAC_HIST_CNT2, 0);
5503         nw64_mac(RXMAC_HIST_CNT3, 0);
5504         nw64_mac(RXMAC_HIST_CNT4, 0);
5505         nw64_mac(RXMAC_HIST_CNT5, 0);
5506         nw64_mac(RXMAC_HIST_CNT6, 0);
5507         nw64_mac(RXMAC_HIST_CNT7, 0);
5508         nw64_mac(RXMAC_MPSZER_CNT, 0);
5509         nw64_mac(RXMAC_CRC_ER_CNT, 0);
5510         nw64_mac(RXMAC_CD_VIO_CNT, 0);
5511         nw64_mac(LINK_FAULT_CNT, 0);
5512 }
5513
5514 static void niu_init_rx_bmac(struct niu *np)
5515 {
5516         struct niu_parent *parent = np->parent;
5517         struct niu_rdc_tables *tp = &parent->rdc_group_cfg[np->port];
5518         int first_rdc_table = tp->first_table_num;
5519         unsigned long i;
5520         u64 val;
5521
5522         nw64_mac(BMAC_ADD_FILT0, 0);
5523         nw64_mac(BMAC_ADD_FILT1, 0);
5524         nw64_mac(BMAC_ADD_FILT2, 0);
5525         nw64_mac(BMAC_ADD_FILT12_MASK, 0);
5526         nw64_mac(BMAC_ADD_FILT00_MASK, 0);
5527         for (i = 0; i < MAC_NUM_HASH; i++)
5528                 nw64_mac(BMAC_HASH_TBL(i), 0);
5529         niu_set_primary_mac_rdc_table(np, first_rdc_table, 1);
5530         niu_set_multicast_mac_rdc_table(np, first_rdc_table, 1);
5531         nw64_mac(BRXMAC_STATUS_MASK, ~(u64)0);
5532
5533         val = nr64_mac(BRXMAC_CONFIG);
5534         val &= ~(BRXMAC_CONFIG_ENABLE |
5535                  BRXMAC_CONFIG_STRIP_PAD |
5536                  BRXMAC_CONFIG_STRIP_FCS |
5537                  BRXMAC_CONFIG_PROMISC |
5538                  BRXMAC_CONFIG_PROMISC_GRP |
5539                  BRXMAC_CONFIG_ADDR_FILT_EN |
5540                  BRXMAC_CONFIG_DISCARD_DIS);
5541         val |= (BRXMAC_CONFIG_HASH_FILT_EN);
5542         nw64_mac(BRXMAC_CONFIG, val);
5543
5544         val = nr64_mac(BMAC_ADDR_CMPEN);
5545         val |= BMAC_ADDR_CMPEN_EN0;
5546         nw64_mac(BMAC_ADDR_CMPEN, val);
5547 }
5548
5549 static void niu_init_rx_mac(struct niu *np)
5550 {
5551         niu_set_primary_mac(np, np->dev->dev_addr);
5552
5553         if (np->flags & NIU_FLAGS_XMAC)
5554                 niu_init_rx_xmac(np);
5555         else
5556                 niu_init_rx_bmac(np);
5557 }
5558
5559 static void niu_enable_tx_xmac(struct niu *np, int on)
5560 {
5561         u64 val = nr64_mac(XMAC_CONFIG);
5562
5563         if (on)
5564                 val |= XMAC_CONFIG_TX_ENABLE;
5565         else
5566                 val &= ~XMAC_CONFIG_TX_ENABLE;
5567         nw64_mac(XMAC_CONFIG, val);
5568 }
5569
5570 static void niu_enable_tx_bmac(struct niu *np, int on)
5571 {
5572         u64 val = nr64_mac(BTXMAC_CONFIG);
5573
5574         if (on)
5575                 val |= BTXMAC_CONFIG_ENABLE;
5576         else
5577                 val &= ~BTXMAC_CONFIG_ENABLE;
5578         nw64_mac(BTXMAC_CONFIG, val);
5579 }
5580
5581 static void niu_enable_tx_mac(struct niu *np, int on)
5582 {
5583         if (np->flags & NIU_FLAGS_XMAC)
5584                 niu_enable_tx_xmac(np, on);
5585         else
5586                 niu_enable_tx_bmac(np, on);
5587 }
5588
5589 static void niu_enable_rx_xmac(struct niu *np, int on)
5590 {
5591         u64 val = nr64_mac(XMAC_CONFIG);
5592
5593         val &= ~(XMAC_CONFIG_HASH_FILTER_EN |
5594                  XMAC_CONFIG_PROMISCUOUS);
5595
5596         if (np->flags & NIU_FLAGS_MCAST)
5597                 val |= XMAC_CONFIG_HASH_FILTER_EN;
5598         if (np->flags & NIU_FLAGS_PROMISC)
5599                 val |= XMAC_CONFIG_PROMISCUOUS;
5600
5601         if (on)
5602                 val |= XMAC_CONFIG_RX_MAC_ENABLE;
5603         else
5604                 val &= ~XMAC_CONFIG_RX_MAC_ENABLE;
5605         nw64_mac(XMAC_CONFIG, val);
5606 }
5607
5608 static void niu_enable_rx_bmac(struct niu *np, int on)
5609 {
5610         u64 val = nr64_mac(BRXMAC_CONFIG);
5611
5612         val &= ~(BRXMAC_CONFIG_HASH_FILT_EN |
5613                  BRXMAC_CONFIG_PROMISC);
5614
5615         if (np->flags & NIU_FLAGS_MCAST)
5616                 val |= BRXMAC_CONFIG_HASH_FILT_EN;
5617         if (np->flags & NIU_FLAGS_PROMISC)
5618                 val |= BRXMAC_CONFIG_PROMISC;
5619
5620         if (on)
5621                 val |= BRXMAC_CONFIG_ENABLE;
5622         else
5623                 val &= ~BRXMAC_CONFIG_ENABLE;
5624         nw64_mac(BRXMAC_CONFIG, val);
5625 }
5626
5627 static void niu_enable_rx_mac(struct niu *np, int on)
5628 {
5629         if (np->flags & NIU_FLAGS_XMAC)
5630                 niu_enable_rx_xmac(np, on);
5631         else
5632                 niu_enable_rx_bmac(np, on);
5633 }
5634
5635 static int niu_init_mac(struct niu *np)
5636 {
5637         int err;
5638
5639         niu_init_xif(np);
5640         err = niu_init_pcs(np);
5641         if (err)
5642                 return err;
5643
5644         err = niu_reset_tx_mac(np);
5645         if (err)
5646                 return err;
5647         niu_init_tx_mac(np);
5648         err = niu_reset_rx_mac(np);
5649         if (err)
5650                 return err;
5651         niu_init_rx_mac(np);
5652
5653         /* This looks hookey but the RX MAC reset we just did will
5654          * undo some of the state we setup in niu_init_tx_mac() so we
5655          * have to call it again.  In particular, the RX MAC reset will
5656          * set the XMAC_MAX register back to it's default value.
5657          */
5658         niu_init_tx_mac(np);
5659         niu_enable_tx_mac(np, 1);
5660
5661         niu_enable_rx_mac(np, 1);
5662
5663         return 0;
5664 }
5665
5666 static void niu_stop_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
5667 {
5668         (void) niu_tx_channel_stop(np, rp->tx_channel);
5669 }
5670
5671 static void niu_stop_tx_channels(struct niu *np)
5672 {
5673         int i;
5674
5675         for (i = 0; i < np->num_tx_rings; i++) {
5676                 struct tx_ring_info *rp = &np->tx_rings[i];
5677
5678                 niu_stop_one_tx_channel(np, rp);
5679         }
5680 }
5681
5682 static void niu_reset_one_tx_channel(struct niu *np, struct tx_ring_info *rp)
5683 {
5684         (void) niu_tx_channel_reset(np, rp->tx_channel);
5685 }
5686
5687 static void niu_reset_tx_channels(struct niu *np)
5688 {
5689         int i;
5690
5691         for (i = 0; i < np->num_tx_rings; i++) {
5692                 struct tx_ring_info *rp = &np->tx_rings[i];
5693
5694                 niu_reset_one_tx_channel(np, rp);
5695         }
5696 }
5697
5698 static void niu_stop_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
5699 {
5700         (void) niu_enable_rx_channel(np, rp->rx_channel, 0);
5701 }
5702
5703 static void niu_stop_rx_channels(struct niu *np)
5704 {
5705         int i;
5706
5707         for (i = 0; i < np->num_rx_rings; i++) {
5708                 struct rx_ring_info *rp = &np->rx_rings[i];
5709
5710                 niu_stop_one_rx_channel(np, rp);
5711         }
5712 }
5713
5714 static void niu_reset_one_rx_channel(struct niu *np, struct rx_ring_info *rp)
5715 {
5716         int channel = rp->rx_channel;
5717
5718         (void) niu_rx_channel_reset(np, channel);
5719         nw64(RX_DMA_ENT_MSK(channel), RX_DMA_ENT_MSK_ALL);
5720         nw64(RX_DMA_CTL_STAT(channel), 0);
5721         (void) niu_enable_rx_channel(np, channel, 0);
5722 }
5723
5724 static void niu_reset_rx_channels(struct niu *np)
5725 {
5726         int i;
5727
5728         for (i = 0; i < np->num_rx_rings; i++) {
5729                 struct rx_ring_info *rp = &np->rx_rings[i];
5730
5731                 niu_reset_one_rx_channel(np, rp);
5732         }
5733 }
5734
5735 static void niu_disable_ipp(struct niu *np)
5736 {
5737         u64 rd, wr, val;
5738         int limit;
5739
5740         rd = nr64_ipp(IPP_DFIFO_RD_PTR);
5741         wr = nr64_ipp(IPP_DFIFO_WR_PTR);
5742         limit = 100;
5743         while (--limit >= 0 && (rd != wr)) {
5744                 rd = nr64_ipp(IPP_DFIFO_RD_PTR);
5745                 wr = nr64_ipp(IPP_DFIFO_WR_PTR);
5746         }
5747         if (limit < 0 &&
5748             (rd != 0 && wr != 1)) {
5749                 dev_err(np->device, PFX "%s: IPP would not quiesce, "
5750                         "rd_ptr[%llx] wr_ptr[%llx]\n",
5751                         np->dev->name,
5752                         (unsigned long long) nr64_ipp(IPP_DFIFO_RD_PTR),
5753                         (unsigned long long) nr64_ipp(IPP_DFIFO_WR_PTR));
5754         }
5755
5756         val = nr64_ipp(IPP_CFIG);
5757         val &= ~(IPP_CFIG_IPP_ENABLE |
5758                  IPP_CFIG_DFIFO_ECC_EN |
5759                  IPP_CFIG_DROP_BAD_CRC |
5760                  IPP_CFIG_CKSUM_EN);
5761         nw64_ipp(IPP_CFIG, val);
5762
5763         (void) niu_ipp_reset(np);
5764 }
5765
5766 static int niu_init_hw(struct niu *np)
5767 {
5768         int i, err;
5769
5770         niudbg(IFUP, "%s: Initialize TXC\n", np->dev->name);
5771         niu_txc_enable_port(np, 1);
5772         niu_txc_port_dma_enable(np, 1);
5773         niu_txc_set_imask(np, 0);
5774
5775         niudbg(IFUP, "%s: Initialize TX channels\n", np->dev->name);
5776         for (i = 0; i < np->num_tx_rings; i++) {
5777                 struct tx_ring_info *rp = &np->tx_rings[i];
5778
5779                 err = niu_init_one_tx_channel(np, rp);
5780                 if (err)
5781                         return err;
5782         }
5783
5784         niudbg(IFUP, "%s: Initialize RX channels\n", np->dev->name);
5785         err = niu_init_rx_channels(np);
5786         if (err)
5787                 goto out_uninit_tx_channels;
5788
5789         niudbg(IFUP, "%s: Initialize classifier\n", np->dev->name);
5790         err = niu_init_classifier_hw(np);
5791         if (err)
5792                 goto out_uninit_rx_channels;
5793
5794         niudbg(IFUP, "%s: Initialize ZCP\n", np->dev->name);
5795         err = niu_init_zcp(np);
5796         if (err)
5797                 goto out_uninit_rx_channels;
5798
5799         niudbg(IFUP, "%s: Initialize IPP\n", np->dev->name);
5800         err = niu_init_ipp(np);
5801         if (err)
5802                 goto out_uninit_rx_channels;
5803
5804         niudbg(IFUP, "%s: Initialize MAC\n", np->dev->name);
5805         err = niu_init_mac(np);
5806         if (err)
5807                 goto out_uninit_ipp;
5808
5809         return 0;
5810
5811 out_uninit_ipp:
5812         niudbg(IFUP, "%s: Uninit IPP\n", np->dev->name);
5813         niu_disable_ipp(np);
5814
5815 out_uninit_rx_channels:
5816         niudbg(IFUP, "%s: Uninit RX channels\n", np->dev->name);
5817         niu_stop_rx_channels(np);
5818         niu_reset_rx_channels(np);
5819
5820 out_uninit_tx_channels:
5821         niudbg(IFUP, "%s: Uninit TX channels\n", np->dev->name);
5822         niu_stop_tx_channels(np);
5823         niu_reset_tx_channels(np);
5824
5825         return err;
5826 }
5827
5828 static void niu_stop_hw(struct niu *np)
5829 {
5830         niudbg(IFDOWN, "%s: Disable interrupts\n", np->dev->name);
5831         niu_enable_interrupts(np, 0);
5832
5833         niudbg(IFDOWN, "%s: Disable RX MAC\n", np->dev->name);
5834         niu_enable_rx_mac(np, 0);
5835
5836         niudbg(IFDOWN, "%s: Disable IPP\n", np->dev->name);
5837         niu_disable_ipp(np);
5838
5839         niudbg(IFDOWN, "%s: Stop TX channels\n", np->dev->name);
5840         niu_stop_tx_channels(np);
5841
5842         niudbg(IFDOWN, "%s: Stop RX channels\n", np->dev->name);
5843         niu_stop_rx_channels(np);
5844
5845         niudbg(IFDOWN, "%s: Reset TX channels\n", np->dev->name);
5846         niu_reset_tx_channels(np);
5847
5848         niudbg(IFDOWN, "%s: Reset RX channels\n", np->dev->name);
5849         niu_reset_rx_channels(np);
5850 }
5851
5852 static int niu_request_irq(struct niu *np)
5853 {
5854         int i, j, err;
5855
5856         err = 0;
5857         for (i = 0; i < np->num_ldg; i++) {
5858                 struct niu_ldg *lp = &np->ldg[i];
5859
5860                 err = request_irq(lp->irq, niu_interrupt,
5861                                   IRQF_SHARED | IRQF_SAMPLE_RANDOM,
5862                                   np->dev->name, lp);
5863                 if (err)
5864                         goto out_free_irqs;
5865
5866         }
5867
5868         return 0;
5869
5870 out_free_irqs:
5871         for (j = 0; j < i; j++) {
5872                 struct niu_ldg *lp = &np->ldg[j];
5873
5874                 free_irq(lp->irq, lp);
5875         }
5876         return err;
5877 }
5878
5879 static void niu_free_irq(struct niu *np)
5880 {
5881         int i;
5882
5883         for (i = 0; i < np->num_ldg; i++) {
5884                 struct niu_ldg *lp = &np->ldg[i];
5885
5886                 free_irq(lp->irq, lp);
5887         }
5888 }
5889
5890 static void niu_enable_napi(struct niu *np)
5891 {
5892         int i;
5893
5894         for (i = 0; i < np->num_ldg; i++)
5895                 napi_enable(&np->ldg[i].napi);
5896 }
5897
5898 static void niu_disable_napi(struct niu *np)
5899 {
5900         int i;
5901
5902         for (i = 0; i < np->num_ldg; i++)
5903                 napi_disable(&np->ldg[i].napi);
5904 }
5905
5906 static int niu_open(struct net_device *dev)
5907 {
5908         struct niu *np = netdev_priv(dev);
5909         int err;
5910
5911         netif_carrier_off(dev);
5912
5913         err = niu_alloc_channels(np);
5914         if (err)
5915                 goto out_err;
5916
5917         err = niu_enable_interrupts(np, 0);
5918         if (err)
5919                 goto out_free_channels;
5920
5921         err = niu_request_irq(np);
5922         if (err)
5923                 goto out_free_channels;
5924
5925         niu_enable_napi(np);
5926
5927         spin_lock_irq(&np->lock);
5928
5929         err = niu_init_hw(np);
5930         if (!err) {
5931                 init_timer(&np->timer);
5932                 np->timer.expires = jiffies + HZ;
5933                 np->timer.data = (unsigned long) np;
5934                 np->timer.function = niu_timer;
5935
5936                 err = niu_enable_interrupts(np, 1);
5937                 if (err)
5938                         niu_stop_hw(np);
5939         }
5940
5941         spin_unlock_irq(&np->lock);
5942
5943         if (err) {
5944                 niu_disable_napi(np);
5945                 goto out_free_irq;
5946         }
5947
5948         netif_tx_start_all_queues(dev);
5949
5950         if (np->link_config.loopback_mode != LOOPBACK_DISABLED)
5951                 netif_carrier_on(dev);
5952
5953         add_timer(&np->timer);
5954
5955         return 0;
5956
5957 out_free_irq:
5958         niu_free_irq(np);
5959
5960 out_free_channels:
5961         niu_free_channels(np);
5962
5963 out_err:
5964         return err;
5965 }
5966
5967 static void niu_full_shutdown(struct niu *np, struct net_device *dev)
5968 {
5969         cancel_work_sync(&np->reset_task);
5970
5971         niu_disable_napi(np);
5972         netif_tx_stop_all_queues(dev);
5973
5974         del_timer_sync(&np->timer);
5975
5976         spin_lock_irq(&np->lock);
5977
5978         niu_stop_hw(np);
5979
5980         spin_unlock_irq(&np->lock);
5981 }
5982
5983 static int niu_close(struct net_device *dev)
5984 {
5985         struct niu *np = netdev_priv(dev);
5986
5987         niu_full_shutdown(np, dev);
5988
5989         niu_free_irq(np);
5990
5991         niu_free_channels(np);
5992
5993         niu_handle_led(np, 0);
5994
5995         return 0;
5996 }
5997
5998 static void niu_sync_xmac_stats(struct niu *np)
5999 {
6000         struct niu_xmac_stats *mp = &np->mac_stats.xmac;
6001
6002         mp->tx_frames += nr64_mac(TXMAC_FRM_CNT);
6003         mp->tx_bytes += nr64_mac(TXMAC_BYTE_CNT);
6004
6005         mp->rx_link_faults += nr64_mac(LINK_FAULT_CNT);
6006         mp->rx_align_errors += nr64_mac(RXMAC_ALIGN_ERR_CNT);
6007         mp->rx_frags += nr64_mac(RXMAC_FRAG_CNT);
6008         mp->rx_mcasts += nr64_mac(RXMAC_MC_FRM_CNT);
6009         mp->rx_bcasts += nr64_mac(RXMAC_BC_FRM_CNT);
6010         mp->rx_hist_cnt1 += nr64_mac(RXMAC_HIST_CNT1);
6011         mp->rx_hist_cnt2 += nr64_mac(RXMAC_HIST_CNT2);
6012         mp->rx_hist_cnt3 += nr64_mac(RXMAC_HIST_CNT3);
6013         mp->rx_hist_cnt4 += nr64_mac(RXMAC_HIST_CNT4);
6014         mp->rx_hist_cnt5 += nr64_mac(RXMAC_HIST_CNT5);
6015         mp->rx_hist_cnt6 += nr64_mac(RXMAC_HIST_CNT6);
6016         mp->rx_hist_cnt7 += nr64_mac(RXMAC_HIST_CNT7);
6017         mp->rx_octets += nr64_mac(RXMAC_BT_CNT);
6018         mp->rx_code_violations += nr64_mac(RXMAC_CD_VIO_CNT);
6019         mp->rx_len_errors += nr64_mac(RXMAC_MPSZER_CNT);
6020         mp->rx_crc_errors += nr64_mac(RXMAC_CRC_ER_CNT);
6021 }
6022
6023 static void niu_sync_bmac_stats(struct niu *np)
6024 {
6025         struct niu_bmac_stats *mp = &np->mac_stats.bmac;
6026
6027         mp->tx_bytes += nr64_mac(BTXMAC_BYTE_CNT);
6028         mp->tx_frames += nr64_mac(BTXMAC_FRM_CNT);
6029
6030         mp->rx_frames += nr64_mac(BRXMAC_FRAME_CNT);
6031         mp->rx_align_errors += nr64_mac(BRXMAC_ALIGN_ERR_CNT);
6032         mp->rx_crc_errors += nr64_mac(BRXMAC_ALIGN_ERR_CNT);
6033         mp->rx_len_errors += nr64_mac(BRXMAC_CODE_VIOL_ERR_CNT);
6034 }
6035
6036 static void niu_sync_mac_stats(struct niu *np)
6037 {
6038         if (np->flags & NIU_FLAGS_XMAC)
6039                 niu_sync_xmac_stats(np);
6040         else
6041                 niu_sync_bmac_stats(np);
6042 }
6043
6044 static void niu_get_rx_stats(struct niu *np)
6045 {
6046         unsigned long pkts, dropped, errors, bytes;
6047         int i;
6048
6049         pkts = dropped = errors = bytes = 0;
6050         for (i = 0; i < np->num_rx_rings; i++) {
6051                 struct rx_ring_info *rp = &np->rx_rings[i];
6052
6053                 pkts += rp->rx_packets;
6054                 bytes += rp->rx_bytes;
6055                 dropped += rp->rx_dropped;
6056                 errors += rp->rx_errors;
6057         }
6058         np->net_stats.rx_packets = pkts;
6059         np->net_stats.rx_bytes = bytes;
6060         np->net_stats.rx_dropped = dropped;
6061         np->net_stats.rx_errors = errors;
6062 }
6063
6064 static void niu_get_tx_stats(struct niu *np)
6065 {
6066         unsigned long pkts, errors, bytes;
6067         int i;
6068
6069         pkts = errors = bytes = 0;
6070         for (i = 0; i < np->num_tx_rings; i++) {
6071                 struct tx_ring_info *rp = &np->tx_rings[i];
6072
6073                 pkts += rp->tx_packets;
6074                 bytes += rp->tx_bytes;
6075                 errors += rp->tx_errors;
6076         }
6077         np->net_stats.tx_packets = pkts;
6078         np->net_stats.tx_bytes = bytes;
6079         np->net_stats.tx_errors = errors;
6080 }
6081
6082 static struct net_device_stats *niu_get_stats(struct net_device *dev)
6083 {
6084         struct niu *np = netdev_priv(dev);
6085
6086         niu_get_rx_stats(np);
6087         niu_get_tx_stats(np);
6088
6089         return &np->net_stats;
6090 }
6091
6092 static void niu_load_hash_xmac(struct niu *np, u16 *hash)
6093 {
6094         int i;
6095
6096         for (i = 0; i < 16; i++)
6097                 nw64_mac(XMAC_HASH_TBL(i), hash[i]);
6098 }
6099
6100 static void niu_load_hash_bmac(struct niu *np, u16 *hash)
6101 {
6102         int i;
6103
6104         for (i = 0; i < 16; i++)
6105                 nw64_mac(BMAC_HASH_TBL(i), hash[i]);
6106 }
6107
6108 static void niu_load_hash(struct niu *np, u16 *hash)
6109 {
6110         if (np->flags & NIU_FLAGS_XMAC)
6111                 niu_load_hash_xmac(np, hash);
6112         else
6113                 niu_load_hash_bmac(np, hash);
6114 }
6115
6116 static void niu_set_rx_mode(struct net_device *dev)
6117 {
6118         struct niu *np = netdev_priv(dev);
6119         int i, alt_cnt, err;
6120         struct dev_addr_list *addr;
6121         unsigned long flags;
6122         u16 hash[16] = { 0, };
6123
6124         spin_lock_irqsave(&np->lock, flags);
6125         niu_enable_rx_mac(np, 0);
6126
6127         np->flags &= ~(NIU_FLAGS_MCAST | NIU_FLAGS_PROMISC);
6128         if (dev->flags & IFF_PROMISC)
6129                 np->flags |= NIU_FLAGS_PROMISC;
6130         if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 0))
6131                 np->flags |= NIU_FLAGS_MCAST;
6132
6133         alt_cnt = dev->uc_count;
6134         if (alt_cnt > niu_num_alt_addr(np)) {
6135                 alt_cnt = 0;
6136                 np->flags |= NIU_FLAGS_PROMISC;
6137         }
6138
6139         if (alt_cnt) {
6140                 int index = 0;
6141
6142                 for (addr = dev->uc_list; addr; addr = addr->next) {
6143                         err = niu_set_alt_mac(np, index,
6144                                               addr->da_addr);
6145                         if (err)
6146                                 printk(KERN_WARNING PFX "%s: Error %d "
6147                                        "adding alt mac %d\n",
6148                                        dev->name, err, index);
6149                         err = niu_enable_alt_mac(np, index, 1);
6150                         if (err)
6151                                 printk(KERN_WARNING PFX "%s: Error %d "
6152                                        "enabling alt mac %d\n",
6153                                        dev->name, err, index);
6154
6155                         index++;
6156                 }
6157         } else {
6158                 int alt_start;
6159                 if (np->flags & NIU_FLAGS_XMAC)
6160                         alt_start = 0;
6161                 else
6162                         alt_start = 1;
6163                 for (i = alt_start; i < niu_num_alt_addr(np); i++) {
6164                         err = niu_enable_alt_mac(np, i, 0);
6165                         if (err)
6166                                 printk(KERN_WARNING PFX "%s: Error %d "
6167                                        "disabling alt mac %d\n",
6168                                        dev->name, err, i);
6169                 }
6170         }
6171         if (dev->flags & IFF_ALLMULTI) {
6172                 for (i = 0; i < 16; i++)
6173                         hash[i] = 0xffff;
6174         } else if (dev->mc_count > 0) {
6175                 for (addr = dev->mc_list; addr; addr = addr->next) {
6176                         u32 crc = ether_crc_le(ETH_ALEN, addr->da_addr);
6177
6178                         crc >>= 24;
6179                         hash[crc >> 4] |= (1 << (15 - (crc & 0xf)));
6180                 }
6181         }
6182
6183         if (np->flags & NIU_FLAGS_MCAST)
6184                 niu_load_hash(np, hash);
6185
6186         niu_enable_rx_mac(np, 1);
6187         spin_unlock_irqrestore(&np->lock, flags);
6188 }
6189
6190 static int niu_set_mac_addr(struct net_device *dev, void *p)
6191 {
6192         struct niu *np = netdev_priv(dev);
6193         struct sockaddr *addr = p;
6194         unsigned long flags;
6195
6196         if (!is_valid_ether_addr(addr->sa_data))
6197                 return -EINVAL;
6198
6199         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
6200
6201         if (!netif_running(dev))
6202                 return 0;
6203
6204         spin_lock_irqsave(&np->lock, flags);
6205         niu_enable_rx_mac(np, 0);
6206         niu_set_primary_mac(np, dev->dev_addr);
6207         niu_enable_rx_mac(np, 1);
6208         spin_unlock_irqrestore(&np->lock, flags);
6209
6210         return 0;
6211 }
6212
6213 static int niu_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
6214 {
6215         return -EOPNOTSUPP;
6216 }
6217
6218 static void niu_netif_stop(struct niu *np)
6219 {
6220         np->dev->trans_start = jiffies; /* prevent tx timeout */
6221
6222         niu_disable_napi(np);
6223
6224         netif_tx_disable(np->dev);
6225 }
6226
6227 static void niu_netif_start(struct niu *np)
6228 {
6229         /* NOTE: unconditional netif_wake_queue is only appropriate
6230          * so long as all callers are assured to have free tx slots
6231          * (such as after niu_init_hw).
6232          */
6233         netif_tx_wake_all_queues(np->dev);
6234
6235         niu_enable_napi(np);
6236
6237         niu_enable_interrupts(np, 1);
6238 }
6239
6240 static void niu_reset_buffers(struct niu *np)
6241 {
6242         int i, j, k, err;
6243
6244         if (np->rx_rings) {
6245                 for (i = 0; i < np->num_rx_rings; i++) {
6246                         struct rx_ring_info *rp = &np->rx_rings[i];
6247
6248                         for (j = 0, k = 0; j < MAX_RBR_RING_SIZE; j++) {
6249                                 struct page *page;
6250
6251                                 page = rp->rxhash[j];
6252                                 while (page) {
6253                                         struct page *next =
6254                                                 (struct page *) page->mapping;
6255                                         u64 base = page->index;
6256                                         base = base >> RBR_DESCR_ADDR_SHIFT;
6257                                         rp->rbr[k++] = cpu_to_le32(base);
6258                                         page = next;
6259                                 }
6260                         }
6261                         for (; k < MAX_RBR_RING_SIZE; k++) {
6262                                 err = niu_rbr_add_page(np, rp, GFP_ATOMIC, k);
6263                                 if (unlikely(err))
6264                                         break;
6265                         }
6266
6267                         rp->rbr_index = rp->rbr_table_size - 1;
6268                         rp->rcr_index = 0;
6269                         rp->rbr_pending = 0;
6270                         rp->rbr_refill_pending = 0;
6271                 }
6272         }
6273         if (np->tx_rings) {
6274                 for (i = 0; i < np->num_tx_rings; i++) {
6275                         struct tx_ring_info *rp = &np->tx_rings[i];
6276
6277                         for (j = 0; j < MAX_TX_RING_SIZE; j++) {
6278                                 if (rp->tx_buffs[j].skb)
6279                                         (void) release_tx_packet(np, rp, j);
6280                         }
6281
6282                         rp->pending = MAX_TX_RING_SIZE;
6283                         rp->prod = 0;
6284                         rp->cons = 0;
6285                         rp->wrap_bit = 0;
6286                 }
6287         }
6288 }
6289
6290 static void niu_reset_task(struct work_struct *work)
6291 {
6292         struct niu *np = container_of(work, struct niu, reset_task);
6293         unsigned long flags;
6294         int err;
6295
6296         spin_lock_irqsave(&np->lock, flags);
6297         if (!netif_running(np->dev)) {
6298                 spin_unlock_irqrestore(&np->lock, flags);
6299                 return;
6300         }
6301
6302         spin_unlock_irqrestore(&np->lock, flags);
6303
6304         del_timer_sync(&np->timer);
6305
6306         niu_netif_stop(np);
6307
6308         spin_lock_irqsave(&np->lock, flags);
6309
6310         niu_stop_hw(np);
6311
6312         spin_unlock_irqrestore(&np->lock, flags);
6313
6314         niu_reset_buffers(np);
6315
6316         spin_lock_irqsave(&np->lock, flags);
6317
6318         err = niu_init_hw(np);
6319         if (!err) {
6320                 np->timer.expires = jiffies + HZ;
6321                 add_timer(&np->timer);
6322                 niu_netif_start(np);
6323         }
6324
6325         spin_unlock_irqrestore(&np->lock, flags);
6326 }
6327
6328 static void niu_tx_timeout(struct net_device *dev)
6329 {
6330         struct niu *np = netdev_priv(dev);
6331
6332         dev_err(np->device, PFX "%s: Transmit timed out, resetting\n",
6333                 dev->name);
6334
6335         schedule_work(&np->reset_task);
6336 }
6337
6338 static void niu_set_txd(struct tx_ring_info *rp, int index,
6339                         u64 mapping, u64 len, u64 mark,
6340                         u64 n_frags)
6341 {
6342         __le64 *desc = &rp->descr[index];
6343
6344         *desc = cpu_to_le64(mark |
6345                             (n_frags << TX_DESC_NUM_PTR_SHIFT) |
6346                             (len << TX_DESC_TR_LEN_SHIFT) |
6347                             (mapping & TX_DESC_SAD));
6348 }
6349
6350 static u64 niu_compute_tx_flags(struct sk_buff *skb, struct ethhdr *ehdr,
6351                                 u64 pad_bytes, u64 len)
6352 {
6353         u16 eth_proto, eth_proto_inner;
6354         u64 csum_bits, l3off, ihl, ret;
6355         u8 ip_proto;
6356         int ipv6;
6357
6358         eth_proto = be16_to_cpu(ehdr->h_proto);
6359         eth_proto_inner = eth_proto;
6360         if (eth_proto == ETH_P_8021Q) {
6361                 struct vlan_ethhdr *vp = (struct vlan_ethhdr *) ehdr;
6362                 __be16 val = vp->h_vlan_encapsulated_proto;
6363
6364                 eth_proto_inner = be16_to_cpu(val);
6365         }
6366
6367         ipv6 = ihl = 0;
6368         switch (skb->protocol) {
6369         case __constant_htons(ETH_P_IP):
6370                 ip_proto = ip_hdr(skb)->protocol;
6371                 ihl = ip_hdr(skb)->ihl;
6372                 break;
6373         case __constant_htons(ETH_P_IPV6):
6374                 ip_proto = ipv6_hdr(skb)->nexthdr;
6375                 ihl = (40 >> 2);
6376                 ipv6 = 1;
6377                 break;
6378         default:
6379                 ip_proto = ihl = 0;
6380                 break;
6381         }
6382
6383         csum_bits = TXHDR_CSUM_NONE;
6384         if (skb->ip_summed == CHECKSUM_PARTIAL) {
6385                 u64 start, stuff;
6386
6387                 csum_bits = (ip_proto == IPPROTO_TCP ?
6388                              TXHDR_CSUM_TCP :
6389                              (ip_proto == IPPROTO_UDP ?
6390                               TXHDR_CSUM_UDP : TXHDR_CSUM_SCTP));
6391
6392                 start = skb_transport_offset(skb) -
6393                         (pad_bytes + sizeof(struct tx_pkt_hdr));
6394                 stuff = start + skb->csum_offset;
6395
6396                 csum_bits |= (start / 2) << TXHDR_L4START_SHIFT;
6397                 csum_bits |= (stuff / 2) << TXHDR_L4STUFF_SHIFT;
6398         }
6399
6400         l3off = skb_network_offset(skb) -
6401                 (pad_bytes + sizeof(struct tx_pkt_hdr));
6402
6403         ret = (((pad_bytes / 2) << TXHDR_PAD_SHIFT) |
6404                (len << TXHDR_LEN_SHIFT) |
6405                ((l3off / 2) << TXHDR_L3START_SHIFT) |
6406                (ihl << TXHDR_IHL_SHIFT) |
6407                ((eth_proto_inner < 1536) ? TXHDR_LLC : 0) |
6408                ((eth_proto == ETH_P_8021Q) ? TXHDR_VLAN : 0) |
6409                (ipv6 ? TXHDR_IP_VER : 0) |
6410                csum_bits);
6411
6412         return ret;
6413 }
6414
6415 static int niu_start_xmit(struct sk_buff *skb, struct net_device *dev)
6416 {
6417         struct niu *np = netdev_priv(dev);
6418         unsigned long align, headroom;
6419         struct netdev_queue *txq;
6420         struct tx_ring_info *rp;
6421 &n