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[linux-2.6.git] / drivers / net / jme.c
1 /*
2  * JMicron JMC2x0 series PCIe Ethernet Linux Device Driver
3  *
4  * Copyright 2008 JMicron Technology Corporation
5  * http://www.jmicron.com/
6  *
7  * Author: Guo-Fu Tseng <cooldavid@cooldavid.org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  *
22  */
23
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/pci.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/mii.h>
31 #include <linux/crc32.h>
32 #include <linux/delay.h>
33 #include <linux/spinlock.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/if_vlan.h>
40 #include <linux/slab.h>
41 #include <net/ip6_checksum.h>
42 #include "jme.h"
43
44 static int force_pseudohp = -1;
45 static int no_pseudohp = -1;
46 static int no_extplug = -1;
47 module_param(force_pseudohp, int, 0);
48 MODULE_PARM_DESC(force_pseudohp,
49         "Enable pseudo hot-plug feature manually by driver instead of BIOS.");
50 module_param(no_pseudohp, int, 0);
51 MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
52 module_param(no_extplug, int, 0);
53 MODULE_PARM_DESC(no_extplug,
54         "Do not use external plug signal for pseudo hot-plug.");
55
56 static int
57 jme_mdio_read(struct net_device *netdev, int phy, int reg)
58 {
59         struct jme_adapter *jme = netdev_priv(netdev);
60         int i, val, again = (reg == MII_BMSR) ? 1 : 0;
61
62 read_again:
63         jwrite32(jme, JME_SMI, SMI_OP_REQ |
64                                 smi_phy_addr(phy) |
65                                 smi_reg_addr(reg));
66
67         wmb();
68         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
69                 udelay(20);
70                 val = jread32(jme, JME_SMI);
71                 if ((val & SMI_OP_REQ) == 0)
72                         break;
73         }
74
75         if (i == 0) {
76                 jeprintk(jme->pdev, "phy(%d) read timeout : %d\n", phy, reg);
77                 return 0;
78         }
79
80         if (again--)
81                 goto read_again;
82
83         return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
84 }
85
86 static void
87 jme_mdio_write(struct net_device *netdev,
88                                 int phy, int reg, int val)
89 {
90         struct jme_adapter *jme = netdev_priv(netdev);
91         int i;
92
93         jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
94                 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
95                 smi_phy_addr(phy) | smi_reg_addr(reg));
96
97         wmb();
98         for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
99                 udelay(20);
100                 if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
101                         break;
102         }
103
104         if (i == 0)
105                 jeprintk(jme->pdev, "phy(%d) write timeout : %d\n", phy, reg);
106 }
107
108 static inline void
109 jme_reset_phy_processor(struct jme_adapter *jme)
110 {
111         u32 val;
112
113         jme_mdio_write(jme->dev,
114                         jme->mii_if.phy_id,
115                         MII_ADVERTISE, ADVERTISE_ALL |
116                         ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
117
118         if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
119                 jme_mdio_write(jme->dev,
120                                 jme->mii_if.phy_id,
121                                 MII_CTRL1000,
122                                 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
123
124         val = jme_mdio_read(jme->dev,
125                                 jme->mii_if.phy_id,
126                                 MII_BMCR);
127
128         jme_mdio_write(jme->dev,
129                         jme->mii_if.phy_id,
130                         MII_BMCR, val | BMCR_RESET);
131 }
132
133 static void
134 jme_setup_wakeup_frame(struct jme_adapter *jme,
135                 u32 *mask, u32 crc, int fnr)
136 {
137         int i;
138
139         /*
140          * Setup CRC pattern
141          */
142         jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL));
143         wmb();
144         jwrite32(jme, JME_WFODP, crc);
145         wmb();
146
147         /*
148          * Setup Mask
149          */
150         for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) {
151                 jwrite32(jme, JME_WFOI,
152                                 ((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) |
153                                 (fnr & WFOI_FRAME_SEL));
154                 wmb();
155                 jwrite32(jme, JME_WFODP, mask[i]);
156                 wmb();
157         }
158 }
159
160 static inline void
161 jme_reset_mac_processor(struct jme_adapter *jme)
162 {
163         u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
164         u32 crc = 0xCDCDCDCD;
165         u32 gpreg0;
166         int i;
167
168         jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
169         udelay(2);
170         jwrite32(jme, JME_GHC, jme->reg_ghc);
171
172         jwrite32(jme, JME_RXDBA_LO, 0x00000000);
173         jwrite32(jme, JME_RXDBA_HI, 0x00000000);
174         jwrite32(jme, JME_RXQDC, 0x00000000);
175         jwrite32(jme, JME_RXNDA, 0x00000000);
176         jwrite32(jme, JME_TXDBA_LO, 0x00000000);
177         jwrite32(jme, JME_TXDBA_HI, 0x00000000);
178         jwrite32(jme, JME_TXQDC, 0x00000000);
179         jwrite32(jme, JME_TXNDA, 0x00000000);
180
181         jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
182         jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
183         for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
184                 jme_setup_wakeup_frame(jme, mask, crc, i);
185         if (jme->fpgaver)
186                 gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
187         else
188                 gpreg0 = GPREG0_DEFAULT;
189         jwrite32(jme, JME_GPREG0, gpreg0);
190         jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT);
191 }
192
193 static inline void
194 jme_reset_ghc_speed(struct jme_adapter *jme)
195 {
196         jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX);
197         jwrite32(jme, JME_GHC, jme->reg_ghc);
198 }
199
200 static inline void
201 jme_clear_pm(struct jme_adapter *jme)
202 {
203         jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
204         pci_set_power_state(jme->pdev, PCI_D0);
205         pci_enable_wake(jme->pdev, PCI_D0, false);
206 }
207
208 static int
209 jme_reload_eeprom(struct jme_adapter *jme)
210 {
211         u32 val;
212         int i;
213
214         val = jread32(jme, JME_SMBCSR);
215
216         if (val & SMBCSR_EEPROMD) {
217                 val |= SMBCSR_CNACK;
218                 jwrite32(jme, JME_SMBCSR, val);
219                 val |= SMBCSR_RELOAD;
220                 jwrite32(jme, JME_SMBCSR, val);
221                 mdelay(12);
222
223                 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
224                         mdelay(1);
225                         if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
226                                 break;
227                 }
228
229                 if (i == 0) {
230                         jeprintk(jme->pdev, "eeprom reload timeout\n");
231                         return -EIO;
232                 }
233         }
234
235         return 0;
236 }
237
238 static void
239 jme_load_macaddr(struct net_device *netdev)
240 {
241         struct jme_adapter *jme = netdev_priv(netdev);
242         unsigned char macaddr[6];
243         u32 val;
244
245         spin_lock_bh(&jme->macaddr_lock);
246         val = jread32(jme, JME_RXUMA_LO);
247         macaddr[0] = (val >>  0) & 0xFF;
248         macaddr[1] = (val >>  8) & 0xFF;
249         macaddr[2] = (val >> 16) & 0xFF;
250         macaddr[3] = (val >> 24) & 0xFF;
251         val = jread32(jme, JME_RXUMA_HI);
252         macaddr[4] = (val >>  0) & 0xFF;
253         macaddr[5] = (val >>  8) & 0xFF;
254         memcpy(netdev->dev_addr, macaddr, 6);
255         spin_unlock_bh(&jme->macaddr_lock);
256 }
257
258 static inline void
259 jme_set_rx_pcc(struct jme_adapter *jme, int p)
260 {
261         switch (p) {
262         case PCC_OFF:
263                 jwrite32(jme, JME_PCCRX0,
264                         ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
265                         ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
266                 break;
267         case PCC_P1:
268                 jwrite32(jme, JME_PCCRX0,
269                         ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
270                         ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
271                 break;
272         case PCC_P2:
273                 jwrite32(jme, JME_PCCRX0,
274                         ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
275                         ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
276                 break;
277         case PCC_P3:
278                 jwrite32(jme, JME_PCCRX0,
279                         ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
280                         ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
281                 break;
282         default:
283                 break;
284         }
285         wmb();
286
287         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
288                 netif_info(jme, rx_status, jme->dev, "Switched to PCC_P%d\n", p);
289 }
290
291 static void
292 jme_start_irq(struct jme_adapter *jme)
293 {
294         register struct dynpcc_info *dpi = &(jme->dpi);
295
296         jme_set_rx_pcc(jme, PCC_P1);
297         dpi->cur                = PCC_P1;
298         dpi->attempt            = PCC_P1;
299         dpi->cnt                = 0;
300
301         jwrite32(jme, JME_PCCTX,
302                         ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
303                         ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
304                         PCCTXQ0_EN
305                 );
306
307         /*
308          * Enable Interrupts
309          */
310         jwrite32(jme, JME_IENS, INTR_ENABLE);
311 }
312
313 static inline void
314 jme_stop_irq(struct jme_adapter *jme)
315 {
316         /*
317          * Disable Interrupts
318          */
319         jwrite32f(jme, JME_IENC, INTR_ENABLE);
320 }
321
322 static u32
323 jme_linkstat_from_phy(struct jme_adapter *jme)
324 {
325         u32 phylink, bmsr;
326
327         phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
328         bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
329         if (bmsr & BMSR_ANCOMP)
330                 phylink |= PHY_LINK_AUTONEG_COMPLETE;
331
332         return phylink;
333 }
334
335 static inline void
336 jme_set_phyfifoa(struct jme_adapter *jme)
337 {
338         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
339 }
340
341 static inline void
342 jme_set_phyfifob(struct jme_adapter *jme)
343 {
344         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
345 }
346
347 static int
348 jme_check_link(struct net_device *netdev, int testonly)
349 {
350         struct jme_adapter *jme = netdev_priv(netdev);
351         u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
352         char linkmsg[64];
353         int rc = 0;
354
355         linkmsg[0] = '\0';
356
357         if (jme->fpgaver)
358                 phylink = jme_linkstat_from_phy(jme);
359         else
360                 phylink = jread32(jme, JME_PHY_LINK);
361
362         if (phylink & PHY_LINK_UP) {
363                 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
364                         /*
365                          * If we did not enable AN
366                          * Speed/Duplex Info should be obtained from SMI
367                          */
368                         phylink = PHY_LINK_UP;
369
370                         bmcr = jme_mdio_read(jme->dev,
371                                                 jme->mii_if.phy_id,
372                                                 MII_BMCR);
373
374                         phylink |= ((bmcr & BMCR_SPEED1000) &&
375                                         (bmcr & BMCR_SPEED100) == 0) ?
376                                         PHY_LINK_SPEED_1000M :
377                                         (bmcr & BMCR_SPEED100) ?
378                                         PHY_LINK_SPEED_100M :
379                                         PHY_LINK_SPEED_10M;
380
381                         phylink |= (bmcr & BMCR_FULLDPLX) ?
382                                          PHY_LINK_DUPLEX : 0;
383
384                         strcat(linkmsg, "Forced: ");
385                 } else {
386                         /*
387                          * Keep polling for speed/duplex resolve complete
388                          */
389                         while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
390                                 --cnt) {
391
392                                 udelay(1);
393
394                                 if (jme->fpgaver)
395                                         phylink = jme_linkstat_from_phy(jme);
396                                 else
397                                         phylink = jread32(jme, JME_PHY_LINK);
398                         }
399                         if (!cnt)
400                                 jeprintk(jme->pdev,
401                                         "Waiting speed resolve timeout.\n");
402
403                         strcat(linkmsg, "ANed: ");
404                 }
405
406                 if (jme->phylink == phylink) {
407                         rc = 1;
408                         goto out;
409                 }
410                 if (testonly)
411                         goto out;
412
413                 jme->phylink = phylink;
414
415                 ghc = jme->reg_ghc & ~(GHC_SPEED | GHC_DPX |
416                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE |
417                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY);
418                 switch (phylink & PHY_LINK_SPEED_MASK) {
419                 case PHY_LINK_SPEED_10M:
420                         ghc |= GHC_SPEED_10M |
421                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
422                         strcat(linkmsg, "10 Mbps, ");
423                         break;
424                 case PHY_LINK_SPEED_100M:
425                         ghc |= GHC_SPEED_100M |
426                                 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
427                         strcat(linkmsg, "100 Mbps, ");
428                         break;
429                 case PHY_LINK_SPEED_1000M:
430                         ghc |= GHC_SPEED_1000M |
431                                 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
432                         strcat(linkmsg, "1000 Mbps, ");
433                         break;
434                 default:
435                         break;
436                 }
437
438                 if (phylink & PHY_LINK_DUPLEX) {
439                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
440                         ghc |= GHC_DPX;
441                 } else {
442                         jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
443                                                 TXMCS_BACKOFF |
444                                                 TXMCS_CARRIERSENSE |
445                                                 TXMCS_COLLISION);
446                         jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
447                                 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
448                                 TXTRHD_TXREN |
449                                 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
450                 }
451
452                 gpreg1 = GPREG1_DEFAULT;
453                 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
454                         if (!(phylink & PHY_LINK_DUPLEX))
455                                 gpreg1 |= GPREG1_HALFMODEPATCH;
456                         switch (phylink & PHY_LINK_SPEED_MASK) {
457                         case PHY_LINK_SPEED_10M:
458                                 jme_set_phyfifoa(jme);
459                                 gpreg1 |= GPREG1_RSSPATCH;
460                                 break;
461                         case PHY_LINK_SPEED_100M:
462                                 jme_set_phyfifob(jme);
463                                 gpreg1 |= GPREG1_RSSPATCH;
464                                 break;
465                         case PHY_LINK_SPEED_1000M:
466                                 jme_set_phyfifoa(jme);
467                                 break;
468                         default:
469                                 break;
470                         }
471                 }
472
473                 jwrite32(jme, JME_GPREG1, gpreg1);
474                 jwrite32(jme, JME_GHC, ghc);
475                 jme->reg_ghc = ghc;
476
477                 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
478                                         "Full-Duplex, " :
479                                         "Half-Duplex, ");
480                 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
481                                         "MDI-X" :
482                                         "MDI");
483                 netif_info(jme, link, jme->dev, "Link is up at %s.\n", linkmsg);
484                 netif_carrier_on(netdev);
485         } else {
486                 if (testonly)
487                         goto out;
488
489                 netif_info(jme, link, jme->dev, "Link is down.\n");
490                 jme->phylink = 0;
491                 netif_carrier_off(netdev);
492         }
493
494 out:
495         return rc;
496 }
497
498 static int
499 jme_setup_tx_resources(struct jme_adapter *jme)
500 {
501         struct jme_ring *txring = &(jme->txring[0]);
502
503         txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
504                                    TX_RING_ALLOC_SIZE(jme->tx_ring_size),
505                                    &(txring->dmaalloc),
506                                    GFP_ATOMIC);
507
508         if (!txring->alloc)
509                 goto err_set_null;
510
511         /*
512          * 16 Bytes align
513          */
514         txring->desc            = (void *)ALIGN((unsigned long)(txring->alloc),
515                                                 RING_DESC_ALIGN);
516         txring->dma             = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
517         txring->next_to_use     = 0;
518         atomic_set(&txring->next_to_clean, 0);
519         atomic_set(&txring->nr_free, jme->tx_ring_size);
520
521         txring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
522                                         jme->tx_ring_size, GFP_ATOMIC);
523         if (unlikely(!(txring->bufinf)))
524                 goto err_free_txring;
525
526         /*
527          * Initialize Transmit Descriptors
528          */
529         memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
530         memset(txring->bufinf, 0,
531                 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
532
533         return 0;
534
535 err_free_txring:
536         dma_free_coherent(&(jme->pdev->dev),
537                           TX_RING_ALLOC_SIZE(jme->tx_ring_size),
538                           txring->alloc,
539                           txring->dmaalloc);
540
541 err_set_null:
542         txring->desc = NULL;
543         txring->dmaalloc = 0;
544         txring->dma = 0;
545         txring->bufinf = NULL;
546
547         return -ENOMEM;
548 }
549
550 static void
551 jme_free_tx_resources(struct jme_adapter *jme)
552 {
553         int i;
554         struct jme_ring *txring = &(jme->txring[0]);
555         struct jme_buffer_info *txbi;
556
557         if (txring->alloc) {
558                 if (txring->bufinf) {
559                         for (i = 0 ; i < jme->tx_ring_size ; ++i) {
560                                 txbi = txring->bufinf + i;
561                                 if (txbi->skb) {
562                                         dev_kfree_skb(txbi->skb);
563                                         txbi->skb = NULL;
564                                 }
565                                 txbi->mapping           = 0;
566                                 txbi->len               = 0;
567                                 txbi->nr_desc           = 0;
568                                 txbi->start_xmit        = 0;
569                         }
570                         kfree(txring->bufinf);
571                 }
572
573                 dma_free_coherent(&(jme->pdev->dev),
574                                   TX_RING_ALLOC_SIZE(jme->tx_ring_size),
575                                   txring->alloc,
576                                   txring->dmaalloc);
577
578                 txring->alloc           = NULL;
579                 txring->desc            = NULL;
580                 txring->dmaalloc        = 0;
581                 txring->dma             = 0;
582                 txring->bufinf          = NULL;
583         }
584         txring->next_to_use     = 0;
585         atomic_set(&txring->next_to_clean, 0);
586         atomic_set(&txring->nr_free, 0);
587 }
588
589 static inline void
590 jme_enable_tx_engine(struct jme_adapter *jme)
591 {
592         /*
593          * Select Queue 0
594          */
595         jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
596         wmb();
597
598         /*
599          * Setup TX Queue 0 DMA Bass Address
600          */
601         jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
602         jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
603         jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
604
605         /*
606          * Setup TX Descptor Count
607          */
608         jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
609
610         /*
611          * Enable TX Engine
612          */
613         wmb();
614         jwrite32(jme, JME_TXCS, jme->reg_txcs |
615                                 TXCS_SELECT_QUEUE0 |
616                                 TXCS_ENABLE);
617
618 }
619
620 static inline void
621 jme_restart_tx_engine(struct jme_adapter *jme)
622 {
623         /*
624          * Restart TX Engine
625          */
626         jwrite32(jme, JME_TXCS, jme->reg_txcs |
627                                 TXCS_SELECT_QUEUE0 |
628                                 TXCS_ENABLE);
629 }
630
631 static inline void
632 jme_disable_tx_engine(struct jme_adapter *jme)
633 {
634         int i;
635         u32 val;
636
637         /*
638          * Disable TX Engine
639          */
640         jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
641         wmb();
642
643         val = jread32(jme, JME_TXCS);
644         for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
645                 mdelay(1);
646                 val = jread32(jme, JME_TXCS);
647                 rmb();
648         }
649
650         if (!i)
651                 jeprintk(jme->pdev, "Disable TX engine timeout.\n");
652 }
653
654 static void
655 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
656 {
657         struct jme_ring *rxring = &(jme->rxring[0]);
658         register struct rxdesc *rxdesc = rxring->desc;
659         struct jme_buffer_info *rxbi = rxring->bufinf;
660         rxdesc += i;
661         rxbi += i;
662
663         rxdesc->dw[0] = 0;
664         rxdesc->dw[1] = 0;
665         rxdesc->desc1.bufaddrh  = cpu_to_le32((__u64)rxbi->mapping >> 32);
666         rxdesc->desc1.bufaddrl  = cpu_to_le32(
667                                         (__u64)rxbi->mapping & 0xFFFFFFFFUL);
668         rxdesc->desc1.datalen   = cpu_to_le16(rxbi->len);
669         if (jme->dev->features & NETIF_F_HIGHDMA)
670                 rxdesc->desc1.flags = RXFLAG_64BIT;
671         wmb();
672         rxdesc->desc1.flags     |= RXFLAG_OWN | RXFLAG_INT;
673 }
674
675 static int
676 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
677 {
678         struct jme_ring *rxring = &(jme->rxring[0]);
679         struct jme_buffer_info *rxbi = rxring->bufinf + i;
680         struct sk_buff *skb;
681
682         skb = netdev_alloc_skb(jme->dev,
683                 jme->dev->mtu + RX_EXTRA_LEN);
684         if (unlikely(!skb))
685                 return -ENOMEM;
686
687         rxbi->skb = skb;
688         rxbi->len = skb_tailroom(skb);
689         rxbi->mapping = pci_map_page(jme->pdev,
690                                         virt_to_page(skb->data),
691                                         offset_in_page(skb->data),
692                                         rxbi->len,
693                                         PCI_DMA_FROMDEVICE);
694
695         return 0;
696 }
697
698 static void
699 jme_free_rx_buf(struct jme_adapter *jme, int i)
700 {
701         struct jme_ring *rxring = &(jme->rxring[0]);
702         struct jme_buffer_info *rxbi = rxring->bufinf;
703         rxbi += i;
704
705         if (rxbi->skb) {
706                 pci_unmap_page(jme->pdev,
707                                  rxbi->mapping,
708                                  rxbi->len,
709                                  PCI_DMA_FROMDEVICE);
710                 dev_kfree_skb(rxbi->skb);
711                 rxbi->skb = NULL;
712                 rxbi->mapping = 0;
713                 rxbi->len = 0;
714         }
715 }
716
717 static void
718 jme_free_rx_resources(struct jme_adapter *jme)
719 {
720         int i;
721         struct jme_ring *rxring = &(jme->rxring[0]);
722
723         if (rxring->alloc) {
724                 if (rxring->bufinf) {
725                         for (i = 0 ; i < jme->rx_ring_size ; ++i)
726                                 jme_free_rx_buf(jme, i);
727                         kfree(rxring->bufinf);
728                 }
729
730                 dma_free_coherent(&(jme->pdev->dev),
731                                   RX_RING_ALLOC_SIZE(jme->rx_ring_size),
732                                   rxring->alloc,
733                                   rxring->dmaalloc);
734                 rxring->alloc    = NULL;
735                 rxring->desc     = NULL;
736                 rxring->dmaalloc = 0;
737                 rxring->dma      = 0;
738                 rxring->bufinf   = NULL;
739         }
740         rxring->next_to_use   = 0;
741         atomic_set(&rxring->next_to_clean, 0);
742 }
743
744 static int
745 jme_setup_rx_resources(struct jme_adapter *jme)
746 {
747         int i;
748         struct jme_ring *rxring = &(jme->rxring[0]);
749
750         rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
751                                    RX_RING_ALLOC_SIZE(jme->rx_ring_size),
752                                    &(rxring->dmaalloc),
753                                    GFP_ATOMIC);
754         if (!rxring->alloc)
755                 goto err_set_null;
756
757         /*
758          * 16 Bytes align
759          */
760         rxring->desc            = (void *)ALIGN((unsigned long)(rxring->alloc),
761                                                 RING_DESC_ALIGN);
762         rxring->dma             = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
763         rxring->next_to_use     = 0;
764         atomic_set(&rxring->next_to_clean, 0);
765
766         rxring->bufinf          = kmalloc(sizeof(struct jme_buffer_info) *
767                                         jme->rx_ring_size, GFP_ATOMIC);
768         if (unlikely(!(rxring->bufinf)))
769                 goto err_free_rxring;
770
771         /*
772          * Initiallize Receive Descriptors
773          */
774         memset(rxring->bufinf, 0,
775                 sizeof(struct jme_buffer_info) * jme->rx_ring_size);
776         for (i = 0 ; i < jme->rx_ring_size ; ++i) {
777                 if (unlikely(jme_make_new_rx_buf(jme, i))) {
778                         jme_free_rx_resources(jme);
779                         return -ENOMEM;
780                 }
781
782                 jme_set_clean_rxdesc(jme, i);
783         }
784
785         return 0;
786
787 err_free_rxring:
788         dma_free_coherent(&(jme->pdev->dev),
789                           RX_RING_ALLOC_SIZE(jme->rx_ring_size),
790                           rxring->alloc,
791                           rxring->dmaalloc);
792 err_set_null:
793         rxring->desc = NULL;
794         rxring->dmaalloc = 0;
795         rxring->dma = 0;
796         rxring->bufinf = NULL;
797
798         return -ENOMEM;
799 }
800
801 static inline void
802 jme_enable_rx_engine(struct jme_adapter *jme)
803 {
804         /*
805          * Select Queue 0
806          */
807         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
808                                 RXCS_QUEUESEL_Q0);
809         wmb();
810
811         /*
812          * Setup RX DMA Bass Address
813          */
814         jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
815         jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
816         jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
817
818         /*
819          * Setup RX Descriptor Count
820          */
821         jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
822
823         /*
824          * Setup Unicast Filter
825          */
826         jme_set_multi(jme->dev);
827
828         /*
829          * Enable RX Engine
830          */
831         wmb();
832         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
833                                 RXCS_QUEUESEL_Q0 |
834                                 RXCS_ENABLE |
835                                 RXCS_QST);
836 }
837
838 static inline void
839 jme_restart_rx_engine(struct jme_adapter *jme)
840 {
841         /*
842          * Start RX Engine
843          */
844         jwrite32(jme, JME_RXCS, jme->reg_rxcs |
845                                 RXCS_QUEUESEL_Q0 |
846                                 RXCS_ENABLE |
847                                 RXCS_QST);
848 }
849
850 static inline void
851 jme_disable_rx_engine(struct jme_adapter *jme)
852 {
853         int i;
854         u32 val;
855
856         /*
857          * Disable RX Engine
858          */
859         jwrite32(jme, JME_RXCS, jme->reg_rxcs);
860         wmb();
861
862         val = jread32(jme, JME_RXCS);
863         for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
864                 mdelay(1);
865                 val = jread32(jme, JME_RXCS);
866                 rmb();
867         }
868
869         if (!i)
870                 jeprintk(jme->pdev, "Disable RX engine timeout.\n");
871
872 }
873
874 static int
875 jme_rxsum_ok(struct jme_adapter *jme, u16 flags)
876 {
877         if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
878                 return false;
879
880         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
881                         == RXWBFLAG_TCPON)) {
882                 if (flags & RXWBFLAG_IPV4)
883                         netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
884                 return false;
885         }
886
887         if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
888                         == RXWBFLAG_UDPON)) {
889                 if (flags & RXWBFLAG_IPV4)
890                         netif_err(jme, rx_err, jme->dev, "UDP Checksum error.\n");
891                 return false;
892         }
893
894         if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
895                         == RXWBFLAG_IPV4)) {
896                 netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error.\n");
897                 return false;
898         }
899
900         return true;
901 }
902
903 static void
904 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
905 {
906         struct jme_ring *rxring = &(jme->rxring[0]);
907         struct rxdesc *rxdesc = rxring->desc;
908         struct jme_buffer_info *rxbi = rxring->bufinf;
909         struct sk_buff *skb;
910         int framesize;
911
912         rxdesc += idx;
913         rxbi += idx;
914
915         skb = rxbi->skb;
916         pci_dma_sync_single_for_cpu(jme->pdev,
917                                         rxbi->mapping,
918                                         rxbi->len,
919                                         PCI_DMA_FROMDEVICE);
920
921         if (unlikely(jme_make_new_rx_buf(jme, idx))) {
922                 pci_dma_sync_single_for_device(jme->pdev,
923                                                 rxbi->mapping,
924                                                 rxbi->len,
925                                                 PCI_DMA_FROMDEVICE);
926
927                 ++(NET_STAT(jme).rx_dropped);
928         } else {
929                 framesize = le16_to_cpu(rxdesc->descwb.framesize)
930                                 - RX_PREPAD_SIZE;
931
932                 skb_reserve(skb, RX_PREPAD_SIZE);
933                 skb_put(skb, framesize);
934                 skb->protocol = eth_type_trans(skb, jme->dev);
935
936                 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags)))
937                         skb->ip_summed = CHECKSUM_UNNECESSARY;
938                 else
939                         skb->ip_summed = CHECKSUM_NONE;
940
941                 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
942                         if (jme->vlgrp) {
943                                 jme->jme_vlan_rx(skb, jme->vlgrp,
944                                         le16_to_cpu(rxdesc->descwb.vlan));
945                                 NET_STAT(jme).rx_bytes += 4;
946                         } else {
947                                 dev_kfree_skb(skb);
948                         }
949                 } else {
950                         jme->jme_rx(skb);
951                 }
952
953                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
954                     cpu_to_le16(RXWBFLAG_DEST_MUL))
955                         ++(NET_STAT(jme).multicast);
956
957                 NET_STAT(jme).rx_bytes += framesize;
958                 ++(NET_STAT(jme).rx_packets);
959         }
960
961         jme_set_clean_rxdesc(jme, idx);
962
963 }
964
965 static int
966 jme_process_receive(struct jme_adapter *jme, int limit)
967 {
968         struct jme_ring *rxring = &(jme->rxring[0]);
969         struct rxdesc *rxdesc = rxring->desc;
970         int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
971
972         if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
973                 goto out_inc;
974
975         if (unlikely(atomic_read(&jme->link_changing) != 1))
976                 goto out_inc;
977
978         if (unlikely(!netif_carrier_ok(jme->dev)))
979                 goto out_inc;
980
981         i = atomic_read(&rxring->next_to_clean);
982         while (limit > 0) {
983                 rxdesc = rxring->desc;
984                 rxdesc += i;
985
986                 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
987                 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
988                         goto out;
989                 --limit;
990
991                 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
992
993                 if (unlikely(desccnt > 1 ||
994                 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
995
996                         if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
997                                 ++(NET_STAT(jme).rx_crc_errors);
998                         else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
999                                 ++(NET_STAT(jme).rx_fifo_errors);
1000                         else
1001                                 ++(NET_STAT(jme).rx_errors);
1002
1003                         if (desccnt > 1)
1004                                 limit -= desccnt - 1;
1005
1006                         for (j = i, ccnt = desccnt ; ccnt-- ; ) {
1007                                 jme_set_clean_rxdesc(jme, j);
1008                                 j = (j + 1) & (mask);
1009                         }
1010
1011                 } else {
1012                         jme_alloc_and_feed_skb(jme, i);
1013                 }
1014
1015                 i = (i + desccnt) & (mask);
1016         }
1017
1018 out:
1019         atomic_set(&rxring->next_to_clean, i);
1020
1021 out_inc:
1022         atomic_inc(&jme->rx_cleaning);
1023
1024         return limit > 0 ? limit : 0;
1025
1026 }
1027
1028 static void
1029 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1030 {
1031         if (likely(atmp == dpi->cur)) {
1032                 dpi->cnt = 0;
1033                 return;
1034         }
1035
1036         if (dpi->attempt == atmp) {
1037                 ++(dpi->cnt);
1038         } else {
1039                 dpi->attempt = atmp;
1040                 dpi->cnt = 0;
1041         }
1042
1043 }
1044
1045 static void
1046 jme_dynamic_pcc(struct jme_adapter *jme)
1047 {
1048         register struct dynpcc_info *dpi = &(jme->dpi);
1049
1050         if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1051                 jme_attempt_pcc(dpi, PCC_P3);
1052         else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
1053                  dpi->intr_cnt > PCC_INTR_THRESHOLD)
1054                 jme_attempt_pcc(dpi, PCC_P2);
1055         else
1056                 jme_attempt_pcc(dpi, PCC_P1);
1057
1058         if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1059                 if (dpi->attempt < dpi->cur)
1060                         tasklet_schedule(&jme->rxclean_task);
1061                 jme_set_rx_pcc(jme, dpi->attempt);
1062                 dpi->cur = dpi->attempt;
1063                 dpi->cnt = 0;
1064         }
1065 }
1066
1067 static void
1068 jme_start_pcc_timer(struct jme_adapter *jme)
1069 {
1070         struct dynpcc_info *dpi = &(jme->dpi);
1071         dpi->last_bytes         = NET_STAT(jme).rx_bytes;
1072         dpi->last_pkts          = NET_STAT(jme).rx_packets;
1073         dpi->intr_cnt           = 0;
1074         jwrite32(jme, JME_TMCSR,
1075                 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1076 }
1077
1078 static inline void
1079 jme_stop_pcc_timer(struct jme_adapter *jme)
1080 {
1081         jwrite32(jme, JME_TMCSR, 0);
1082 }
1083
1084 static void
1085 jme_shutdown_nic(struct jme_adapter *jme)
1086 {
1087         u32 phylink;
1088
1089         phylink = jme_linkstat_from_phy(jme);
1090
1091         if (!(phylink & PHY_LINK_UP)) {
1092                 /*
1093                  * Disable all interrupt before issue timer
1094                  */
1095                 jme_stop_irq(jme);
1096                 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1097         }
1098 }
1099
1100 static void
1101 jme_pcc_tasklet(unsigned long arg)
1102 {
1103         struct jme_adapter *jme = (struct jme_adapter *)arg;
1104         struct net_device *netdev = jme->dev;
1105
1106         if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1107                 jme_shutdown_nic(jme);
1108                 return;
1109         }
1110
1111         if (unlikely(!netif_carrier_ok(netdev) ||
1112                 (atomic_read(&jme->link_changing) != 1)
1113         )) {
1114                 jme_stop_pcc_timer(jme);
1115                 return;
1116         }
1117
1118         if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1119                 jme_dynamic_pcc(jme);
1120
1121         jme_start_pcc_timer(jme);
1122 }
1123
1124 static inline void
1125 jme_polling_mode(struct jme_adapter *jme)
1126 {
1127         jme_set_rx_pcc(jme, PCC_OFF);
1128 }
1129
1130 static inline void
1131 jme_interrupt_mode(struct jme_adapter *jme)
1132 {
1133         jme_set_rx_pcc(jme, PCC_P1);
1134 }
1135
1136 static inline int
1137 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1138 {
1139         u32 apmc;
1140         apmc = jread32(jme, JME_APMC);
1141         return apmc & JME_APMC_PSEUDO_HP_EN;
1142 }
1143
1144 static void
1145 jme_start_shutdown_timer(struct jme_adapter *jme)
1146 {
1147         u32 apmc;
1148
1149         apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1150         apmc &= ~JME_APMC_EPIEN_CTRL;
1151         if (!no_extplug) {
1152                 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1153                 wmb();
1154         }
1155         jwrite32f(jme, JME_APMC, apmc);
1156
1157         jwrite32f(jme, JME_TIMER2, 0);
1158         set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1159         jwrite32(jme, JME_TMCSR,
1160                 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1161 }
1162
1163 static void
1164 jme_stop_shutdown_timer(struct jme_adapter *jme)
1165 {
1166         u32 apmc;
1167
1168         jwrite32f(jme, JME_TMCSR, 0);
1169         jwrite32f(jme, JME_TIMER2, 0);
1170         clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1171
1172         apmc = jread32(jme, JME_APMC);
1173         apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1174         jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1175         wmb();
1176         jwrite32f(jme, JME_APMC, apmc);
1177 }
1178
1179 static void
1180 jme_link_change_tasklet(unsigned long arg)
1181 {
1182         struct jme_adapter *jme = (struct jme_adapter *)arg;
1183         struct net_device *netdev = jme->dev;
1184         int rc;
1185
1186         while (!atomic_dec_and_test(&jme->link_changing)) {
1187                 atomic_inc(&jme->link_changing);
1188                 netif_info(jme, intr, jme->dev, "Get link change lock failed.\n");
1189                 while (atomic_read(&jme->link_changing) != 1)
1190                         netif_info(jme, intr, jme->dev, "Waiting link change lock.\n");
1191         }
1192
1193         if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1194                 goto out;
1195
1196         jme->old_mtu = netdev->mtu;
1197         netif_stop_queue(netdev);
1198         if (jme_pseudo_hotplug_enabled(jme))
1199                 jme_stop_shutdown_timer(jme);
1200
1201         jme_stop_pcc_timer(jme);
1202         tasklet_disable(&jme->txclean_task);
1203         tasklet_disable(&jme->rxclean_task);
1204         tasklet_disable(&jme->rxempty_task);
1205
1206         if (netif_carrier_ok(netdev)) {
1207                 jme_reset_ghc_speed(jme);
1208                 jme_disable_rx_engine(jme);
1209                 jme_disable_tx_engine(jme);
1210                 jme_reset_mac_processor(jme);
1211                 jme_free_rx_resources(jme);
1212                 jme_free_tx_resources(jme);
1213
1214                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1215                         jme_polling_mode(jme);
1216
1217                 netif_carrier_off(netdev);
1218         }
1219
1220         jme_check_link(netdev, 0);
1221         if (netif_carrier_ok(netdev)) {
1222                 rc = jme_setup_rx_resources(jme);
1223                 if (rc) {
1224                         jeprintk(jme->pdev, "Allocating resources for RX error"
1225                                 ", Device STOPPED!\n");
1226                         goto out_enable_tasklet;
1227                 }
1228
1229                 rc = jme_setup_tx_resources(jme);
1230                 if (rc) {
1231                         jeprintk(jme->pdev, "Allocating resources for TX error"
1232                                 ", Device STOPPED!\n");
1233                         goto err_out_free_rx_resources;
1234                 }
1235
1236                 jme_enable_rx_engine(jme);
1237                 jme_enable_tx_engine(jme);
1238
1239                 netif_start_queue(netdev);
1240
1241                 if (test_bit(JME_FLAG_POLL, &jme->flags))
1242                         jme_interrupt_mode(jme);
1243
1244                 jme_start_pcc_timer(jme);
1245         } else if (jme_pseudo_hotplug_enabled(jme)) {
1246                 jme_start_shutdown_timer(jme);
1247         }
1248
1249         goto out_enable_tasklet;
1250
1251 err_out_free_rx_resources:
1252         jme_free_rx_resources(jme);
1253 out_enable_tasklet:
1254         tasklet_enable(&jme->txclean_task);
1255         tasklet_hi_enable(&jme->rxclean_task);
1256         tasklet_hi_enable(&jme->rxempty_task);
1257 out:
1258         atomic_inc(&jme->link_changing);
1259 }
1260
1261 static void
1262 jme_rx_clean_tasklet(unsigned long arg)
1263 {
1264         struct jme_adapter *jme = (struct jme_adapter *)arg;
1265         struct dynpcc_info *dpi = &(jme->dpi);
1266
1267         jme_process_receive(jme, jme->rx_ring_size);
1268         ++(dpi->intr_cnt);
1269
1270 }
1271
1272 static int
1273 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1274 {
1275         struct jme_adapter *jme = jme_napi_priv(holder);
1276         int rest;
1277
1278         rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1279
1280         while (atomic_read(&jme->rx_empty) > 0) {
1281                 atomic_dec(&jme->rx_empty);
1282                 ++(NET_STAT(jme).rx_dropped);
1283                 jme_restart_rx_engine(jme);
1284         }
1285         atomic_inc(&jme->rx_empty);
1286
1287         if (rest) {
1288                 JME_RX_COMPLETE(netdev, holder);
1289                 jme_interrupt_mode(jme);
1290         }
1291
1292         JME_NAPI_WEIGHT_SET(budget, rest);
1293         return JME_NAPI_WEIGHT_VAL(budget) - rest;
1294 }
1295
1296 static void
1297 jme_rx_empty_tasklet(unsigned long arg)
1298 {
1299         struct jme_adapter *jme = (struct jme_adapter *)arg;
1300
1301         if (unlikely(atomic_read(&jme->link_changing) != 1))
1302                 return;
1303
1304         if (unlikely(!netif_carrier_ok(jme->dev)))
1305                 return;
1306
1307         netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
1308
1309         jme_rx_clean_tasklet(arg);
1310
1311         while (atomic_read(&jme->rx_empty) > 0) {
1312                 atomic_dec(&jme->rx_empty);
1313                 ++(NET_STAT(jme).rx_dropped);
1314                 jme_restart_rx_engine(jme);
1315         }
1316         atomic_inc(&jme->rx_empty);
1317 }
1318
1319 static void
1320 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1321 {
1322         struct jme_ring *txring = &(jme->txring[0]);
1323
1324         smp_wmb();
1325         if (unlikely(netif_queue_stopped(jme->dev) &&
1326         atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1327                 netif_info(jme, tx_done, jme->dev, "TX Queue Waked.\n");
1328                 netif_wake_queue(jme->dev);
1329         }
1330
1331 }
1332
1333 static void
1334 jme_tx_clean_tasklet(unsigned long arg)
1335 {
1336         struct jme_adapter *jme = (struct jme_adapter *)arg;
1337         struct jme_ring *txring = &(jme->txring[0]);
1338         struct txdesc *txdesc = txring->desc;
1339         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1340         int i, j, cnt = 0, max, err, mask;
1341
1342         tx_dbg(jme, "Into txclean.\n");
1343
1344         if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1345                 goto out;
1346
1347         if (unlikely(atomic_read(&jme->link_changing) != 1))
1348                 goto out;
1349
1350         if (unlikely(!netif_carrier_ok(jme->dev)))
1351                 goto out;
1352
1353         max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1354         mask = jme->tx_ring_mask;
1355
1356         for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1357
1358                 ctxbi = txbi + i;
1359
1360                 if (likely(ctxbi->skb &&
1361                 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1362
1363                         tx_dbg(jme, "txclean: %d+%d@%lu\n",
1364                                         i, ctxbi->nr_desc, jiffies);
1365
1366                         err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1367
1368                         for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1369                                 ttxbi = txbi + ((i + j) & (mask));
1370                                 txdesc[(i + j) & (mask)].dw[0] = 0;
1371
1372                                 pci_unmap_page(jme->pdev,
1373                                                  ttxbi->mapping,
1374                                                  ttxbi->len,
1375                                                  PCI_DMA_TODEVICE);
1376
1377                                 ttxbi->mapping = 0;
1378                                 ttxbi->len = 0;
1379                         }
1380
1381                         dev_kfree_skb(ctxbi->skb);
1382
1383                         cnt += ctxbi->nr_desc;
1384
1385                         if (unlikely(err)) {
1386                                 ++(NET_STAT(jme).tx_carrier_errors);
1387                         } else {
1388                                 ++(NET_STAT(jme).tx_packets);
1389                                 NET_STAT(jme).tx_bytes += ctxbi->len;
1390                         }
1391
1392                         ctxbi->skb = NULL;
1393                         ctxbi->len = 0;
1394                         ctxbi->start_xmit = 0;
1395
1396                 } else {
1397                         break;
1398                 }
1399
1400                 i = (i + ctxbi->nr_desc) & mask;
1401
1402                 ctxbi->nr_desc = 0;
1403         }
1404
1405         tx_dbg(jme, "txclean: done %d@%lu.\n", i, jiffies);
1406         atomic_set(&txring->next_to_clean, i);
1407         atomic_add(cnt, &txring->nr_free);
1408
1409         jme_wake_queue_if_stopped(jme);
1410
1411 out:
1412         atomic_inc(&jme->tx_cleaning);
1413 }
1414
1415 static void
1416 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1417 {
1418         /*
1419          * Disable interrupt
1420          */
1421         jwrite32f(jme, JME_IENC, INTR_ENABLE);
1422
1423         if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1424                 /*
1425                  * Link change event is critical
1426                  * all other events are ignored
1427                  */
1428                 jwrite32(jme, JME_IEVE, intrstat);
1429                 tasklet_schedule(&jme->linkch_task);
1430                 goto out_reenable;
1431         }
1432
1433         if (intrstat & INTR_TMINTR) {
1434                 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1435                 tasklet_schedule(&jme->pcc_task);
1436         }
1437
1438         if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1439                 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1440                 tasklet_schedule(&jme->txclean_task);
1441         }
1442
1443         if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1444                 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1445                                                      INTR_PCCRX0 |
1446                                                      INTR_RX0EMP)) |
1447                                         INTR_RX0);
1448         }
1449
1450         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1451                 if (intrstat & INTR_RX0EMP)
1452                         atomic_inc(&jme->rx_empty);
1453
1454                 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1455                         if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1456                                 jme_polling_mode(jme);
1457                                 JME_RX_SCHEDULE(jme);
1458                         }
1459                 }
1460         } else {
1461                 if (intrstat & INTR_RX0EMP) {
1462                         atomic_inc(&jme->rx_empty);
1463                         tasklet_hi_schedule(&jme->rxempty_task);
1464                 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1465                         tasklet_hi_schedule(&jme->rxclean_task);
1466                 }
1467         }
1468
1469 out_reenable:
1470         /*
1471          * Re-enable interrupt
1472          */
1473         jwrite32f(jme, JME_IENS, INTR_ENABLE);
1474 }
1475
1476 static irqreturn_t
1477 jme_intr(int irq, void *dev_id)
1478 {
1479         struct net_device *netdev = dev_id;
1480         struct jme_adapter *jme = netdev_priv(netdev);
1481         u32 intrstat;
1482
1483         intrstat = jread32(jme, JME_IEVE);
1484
1485         /*
1486          * Check if it's really an interrupt for us
1487          */
1488         if (unlikely((intrstat & INTR_ENABLE) == 0))
1489                 return IRQ_NONE;
1490
1491         /*
1492          * Check if the device still exist
1493          */
1494         if (unlikely(intrstat == ~((typeof(intrstat))0)))
1495                 return IRQ_NONE;
1496
1497         jme_intr_msi(jme, intrstat);
1498
1499         return IRQ_HANDLED;
1500 }
1501
1502 static irqreturn_t
1503 jme_msi(int irq, void *dev_id)
1504 {
1505         struct net_device *netdev = dev_id;
1506         struct jme_adapter *jme = netdev_priv(netdev);
1507         u32 intrstat;
1508
1509         intrstat = jread32(jme, JME_IEVE);
1510
1511         jme_intr_msi(jme, intrstat);
1512
1513         return IRQ_HANDLED;
1514 }
1515
1516 static void
1517 jme_reset_link(struct jme_adapter *jme)
1518 {
1519         jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1520 }
1521
1522 static void
1523 jme_restart_an(struct jme_adapter *jme)
1524 {
1525         u32 bmcr;
1526
1527         spin_lock_bh(&jme->phy_lock);
1528         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1529         bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1530         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1531         spin_unlock_bh(&jme->phy_lock);
1532 }
1533
1534 static int
1535 jme_request_irq(struct jme_adapter *jme)
1536 {
1537         int rc;
1538         struct net_device *netdev = jme->dev;
1539         irq_handler_t handler = jme_intr;
1540         int irq_flags = IRQF_SHARED;
1541
1542         if (!pci_enable_msi(jme->pdev)) {
1543                 set_bit(JME_FLAG_MSI, &jme->flags);
1544                 handler = jme_msi;
1545                 irq_flags = 0;
1546         }
1547
1548         rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1549                           netdev);
1550         if (rc) {
1551                 jeprintk(jme->pdev,
1552                         "Unable to request %s interrupt (return: %d)\n",
1553                         test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1554                         rc);
1555
1556                 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1557                         pci_disable_msi(jme->pdev);
1558                         clear_bit(JME_FLAG_MSI, &jme->flags);
1559                 }
1560         } else {
1561                 netdev->irq = jme->pdev->irq;
1562         }
1563
1564         return rc;
1565 }
1566
1567 static void
1568 jme_free_irq(struct jme_adapter *jme)
1569 {
1570         free_irq(jme->pdev->irq, jme->dev);
1571         if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1572                 pci_disable_msi(jme->pdev);
1573                 clear_bit(JME_FLAG_MSI, &jme->flags);
1574                 jme->dev->irq = jme->pdev->irq;
1575         }
1576 }
1577
1578 static int
1579 jme_open(struct net_device *netdev)
1580 {
1581         struct jme_adapter *jme = netdev_priv(netdev);
1582         int rc;
1583
1584         jme_clear_pm(jme);
1585         JME_NAPI_ENABLE(jme);
1586
1587         tasklet_enable(&jme->linkch_task);
1588         tasklet_enable(&jme->txclean_task);
1589         tasklet_hi_enable(&jme->rxclean_task);
1590         tasklet_hi_enable(&jme->rxempty_task);
1591
1592         rc = jme_request_irq(jme);
1593         if (rc)
1594                 goto err_out;
1595
1596         jme_start_irq(jme);
1597
1598         if (test_bit(JME_FLAG_SSET, &jme->flags))
1599                 jme_set_settings(netdev, &jme->old_ecmd);
1600         else
1601                 jme_reset_phy_processor(jme);
1602
1603         jme_reset_link(jme);
1604
1605         return 0;
1606
1607 err_out:
1608         netif_stop_queue(netdev);
1609         netif_carrier_off(netdev);
1610         return rc;
1611 }
1612
1613 #ifdef CONFIG_PM
1614 static void
1615 jme_set_100m_half(struct jme_adapter *jme)
1616 {
1617         u32 bmcr, tmp;
1618
1619         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1620         tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1621                        BMCR_SPEED1000 | BMCR_FULLDPLX);
1622         tmp |= BMCR_SPEED100;
1623
1624         if (bmcr != tmp)
1625                 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1626
1627         if (jme->fpgaver)
1628                 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1629         else
1630                 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1631 }
1632
1633 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1634 static void
1635 jme_wait_link(struct jme_adapter *jme)
1636 {
1637         u32 phylink, to = JME_WAIT_LINK_TIME;
1638
1639         mdelay(1000);
1640         phylink = jme_linkstat_from_phy(jme);
1641         while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1642                 mdelay(10);
1643                 phylink = jme_linkstat_from_phy(jme);
1644         }
1645 }
1646 #endif
1647
1648 static inline void
1649 jme_phy_off(struct jme_adapter *jme)
1650 {
1651         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1652 }
1653
1654 static int
1655 jme_close(struct net_device *netdev)
1656 {
1657         struct jme_adapter *jme = netdev_priv(netdev);
1658
1659         netif_stop_queue(netdev);
1660         netif_carrier_off(netdev);
1661
1662         jme_stop_irq(jme);
1663         jme_free_irq(jme);
1664
1665         JME_NAPI_DISABLE(jme);
1666
1667         tasklet_disable(&jme->linkch_task);
1668         tasklet_disable(&jme->txclean_task);
1669         tasklet_disable(&jme->rxclean_task);
1670         tasklet_disable(&jme->rxempty_task);
1671
1672         jme_reset_ghc_speed(jme);
1673         jme_disable_rx_engine(jme);
1674         jme_disable_tx_engine(jme);
1675         jme_reset_mac_processor(jme);
1676         jme_free_rx_resources(jme);
1677         jme_free_tx_resources(jme);
1678         jme->phylink = 0;
1679         jme_phy_off(jme);
1680
1681         return 0;
1682 }
1683
1684 static int
1685 jme_alloc_txdesc(struct jme_adapter *jme,
1686                         struct sk_buff *skb)
1687 {
1688         struct jme_ring *txring = &(jme->txring[0]);
1689         int idx, nr_alloc, mask = jme->tx_ring_mask;
1690
1691         idx = txring->next_to_use;
1692         nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1693
1694         if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1695                 return -1;
1696
1697         atomic_sub(nr_alloc, &txring->nr_free);
1698
1699         txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1700
1701         return idx;
1702 }
1703
1704 static void
1705 jme_fill_tx_map(struct pci_dev *pdev,
1706                 struct txdesc *txdesc,
1707                 struct jme_buffer_info *txbi,
1708                 struct page *page,
1709                 u32 page_offset,
1710                 u32 len,
1711                 u8 hidma)
1712 {
1713         dma_addr_t dmaaddr;
1714
1715         dmaaddr = pci_map_page(pdev,
1716                                 page,
1717                                 page_offset,
1718                                 len,
1719                                 PCI_DMA_TODEVICE);
1720
1721         pci_dma_sync_single_for_device(pdev,
1722                                        dmaaddr,
1723                                        len,
1724                                        PCI_DMA_TODEVICE);
1725
1726         txdesc->dw[0] = 0;
1727         txdesc->dw[1] = 0;
1728         txdesc->desc2.flags     = TXFLAG_OWN;
1729         txdesc->desc2.flags     |= (hidma) ? TXFLAG_64BIT : 0;
1730         txdesc->desc2.datalen   = cpu_to_le16(len);
1731         txdesc->desc2.bufaddrh  = cpu_to_le32((__u64)dmaaddr >> 32);
1732         txdesc->desc2.bufaddrl  = cpu_to_le32(
1733                                         (__u64)dmaaddr & 0xFFFFFFFFUL);
1734
1735         txbi->mapping = dmaaddr;
1736         txbi->len = len;
1737 }
1738
1739 static void
1740 jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1741 {
1742         struct jme_ring *txring = &(jme->txring[0]);
1743         struct txdesc *txdesc = txring->desc, *ctxdesc;
1744         struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1745         u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1746         int i, nr_frags = skb_shinfo(skb)->nr_frags;
1747         int mask = jme->tx_ring_mask;
1748         struct skb_frag_struct *frag;
1749         u32 len;
1750
1751         for (i = 0 ; i < nr_frags ; ++i) {
1752                 frag = &skb_shinfo(skb)->frags[i];
1753                 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1754                 ctxbi = txbi + ((idx + i + 2) & (mask));
1755
1756                 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1757                                  frag->page_offset, frag->size, hidma);
1758         }
1759
1760         len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1761         ctxdesc = txdesc + ((idx + 1) & (mask));
1762         ctxbi = txbi + ((idx + 1) & (mask));
1763         jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1764                         offset_in_page(skb->data), len, hidma);
1765
1766 }
1767
1768 static int
1769 jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1770 {
1771         if (unlikely(skb_shinfo(skb)->gso_size &&
1772                         skb_header_cloned(skb) &&
1773                         pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1774                 dev_kfree_skb(skb);
1775                 return -1;
1776         }
1777
1778         return 0;
1779 }
1780
1781 static int
1782 jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1783 {
1784         *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1785         if (*mss) {
1786                 *flags |= TXFLAG_LSEN;
1787
1788                 if (skb->protocol == htons(ETH_P_IP)) {
1789                         struct iphdr *iph = ip_hdr(skb);
1790
1791                         iph->check = 0;
1792                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1793                                                                 iph->daddr, 0,
1794                                                                 IPPROTO_TCP,
1795                                                                 0);
1796                 } else {
1797                         struct ipv6hdr *ip6h = ipv6_hdr(skb);
1798
1799                         tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1800                                                                 &ip6h->daddr, 0,
1801                                                                 IPPROTO_TCP,
1802                                                                 0);
1803                 }
1804
1805                 return 0;
1806         }
1807
1808         return 1;
1809 }
1810
1811 static void
1812 jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1813 {
1814         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1815                 u8 ip_proto;
1816
1817                 switch (skb->protocol) {
1818                 case htons(ETH_P_IP):
1819                         ip_proto = ip_hdr(skb)->protocol;
1820                         break;
1821                 case htons(ETH_P_IPV6):
1822                         ip_proto = ipv6_hdr(skb)->nexthdr;
1823                         break;
1824                 default:
1825                         ip_proto = 0;
1826                         break;
1827                 }
1828
1829                 switch (ip_proto) {
1830                 case IPPROTO_TCP:
1831                         *flags |= TXFLAG_TCPCS;
1832                         break;
1833                 case IPPROTO_UDP:
1834                         *flags |= TXFLAG_UDPCS;
1835                         break;
1836                 default:
1837                         netif_err(jme, tx_err, jme->dev, "Error upper layer protocol.\n");
1838                         break;
1839                 }
1840         }
1841 }
1842
1843 static inline void
1844 jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
1845 {
1846         if (vlan_tx_tag_present(skb)) {
1847                 *flags |= TXFLAG_TAGON;
1848                 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
1849         }
1850 }
1851
1852 static int
1853 jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1854 {
1855         struct jme_ring *txring = &(jme->txring[0]);
1856         struct txdesc *txdesc;
1857         struct jme_buffer_info *txbi;
1858         u8 flags;
1859
1860         txdesc = (struct txdesc *)txring->desc + idx;
1861         txbi = txring->bufinf + idx;
1862
1863         txdesc->dw[0] = 0;
1864         txdesc->dw[1] = 0;
1865         txdesc->dw[2] = 0;
1866         txdesc->dw[3] = 0;
1867         txdesc->desc1.pktsize = cpu_to_le16(skb->len);
1868         /*
1869          * Set OWN bit at final.
1870          * When kernel transmit faster than NIC.
1871          * And NIC trying to send this descriptor before we tell
1872          * it to start sending this TX queue.
1873          * Other fields are already filled correctly.
1874          */
1875         wmb();
1876         flags = TXFLAG_OWN | TXFLAG_INT;
1877         /*
1878          * Set checksum flags while not tso
1879          */
1880         if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
1881                 jme_tx_csum(jme, skb, &flags);
1882         jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
1883         jme_map_tx_skb(jme, skb, idx);
1884         txdesc->desc1.flags = flags;
1885         /*
1886          * Set tx buffer info after telling NIC to send
1887          * For better tx_clean timing
1888          */
1889         wmb();
1890         txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
1891         txbi->skb = skb;
1892         txbi->len = skb->len;
1893         txbi->start_xmit = jiffies;
1894         if (!txbi->start_xmit)
1895                 txbi->start_xmit = (0UL-1);
1896
1897         return 0;
1898 }
1899
1900 static void
1901 jme_stop_queue_if_full(struct jme_adapter *jme)
1902 {
1903         struct jme_ring *txring = &(jme->txring[0]);
1904         struct jme_buffer_info *txbi = txring->bufinf;
1905         int idx = atomic_read(&txring->next_to_clean);
1906
1907         txbi += idx;
1908
1909         smp_wmb();
1910         if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
1911                 netif_stop_queue(jme->dev);
1912                 netif_info(jme, tx_queued, jme->dev, "TX Queue Paused.\n");
1913                 smp_wmb();
1914                 if (atomic_read(&txring->nr_free)
1915                         >= (jme->tx_wake_threshold)) {
1916                         netif_wake_queue(jme->dev);
1917                         netif_info(jme, tx_queued, jme->dev, "TX Queue Fast Waked.\n");
1918                 }
1919         }
1920
1921         if (unlikely(txbi->start_xmit &&
1922                         (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
1923                         txbi->skb)) {
1924                 netif_stop_queue(jme->dev);
1925                 netif_info(jme, tx_queued, jme->dev, "TX Queue Stopped %d@%lu.\n", idx, jiffies);
1926         }
1927 }
1928
1929 /*
1930  * This function is already protected by netif_tx_lock()
1931  */
1932
1933 static netdev_tx_t
1934 jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1935 {
1936         struct jme_adapter *jme = netdev_priv(netdev);
1937         int idx;
1938
1939         if (unlikely(jme_expand_header(jme, skb))) {
1940                 ++(NET_STAT(jme).tx_dropped);
1941                 return NETDEV_TX_OK;
1942         }
1943
1944         idx = jme_alloc_txdesc(jme, skb);
1945
1946         if (unlikely(idx < 0)) {
1947                 netif_stop_queue(netdev);
1948                 netif_err(jme, tx_err, jme->dev, "BUG! Tx ring full when queue awake!\n");
1949
1950                 return NETDEV_TX_BUSY;
1951         }
1952
1953         jme_fill_tx_desc(jme, skb, idx);
1954
1955         jwrite32(jme, JME_TXCS, jme->reg_txcs |
1956                                 TXCS_SELECT_QUEUE0 |
1957                                 TXCS_QUEUE0S |
1958                                 TXCS_ENABLE);
1959
1960         tx_dbg(jme, "xmit: %d+%d@%lu\n", idx,
1961                         skb_shinfo(skb)->nr_frags + 2,
1962                         jiffies);
1963         jme_stop_queue_if_full(jme);
1964
1965         return NETDEV_TX_OK;
1966 }
1967
1968 static int
1969 jme_set_macaddr(struct net_device *netdev, void *p)
1970 {
1971         struct jme_adapter *jme = netdev_priv(netdev);
1972         struct sockaddr *addr = p;
1973         u32 val;
1974
1975         if (netif_running(netdev))
1976                 return -EBUSY;
1977
1978         spin_lock_bh(&jme->macaddr_lock);
1979         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1980
1981         val = (addr->sa_data[3] & 0xff) << 24 |
1982               (addr->sa_data[2] & 0xff) << 16 |
1983               (addr->sa_data[1] & 0xff) <<  8 |
1984               (addr->sa_data[0] & 0xff);
1985         jwrite32(jme, JME_RXUMA_LO, val);
1986         val = (addr->sa_data[5] & 0xff) << 8 |
1987               (addr->sa_data[4] & 0xff);
1988         jwrite32(jme, JME_RXUMA_HI, val);
1989         spin_unlock_bh(&jme->macaddr_lock);
1990
1991         return 0;
1992 }
1993
1994 static void
1995 jme_set_multi(struct net_device *netdev)
1996 {
1997         struct jme_adapter *jme = netdev_priv(netdev);
1998         u32 mc_hash[2] = {};
1999
2000         spin_lock_bh(&jme->rxmcs_lock);
2001
2002         jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
2003
2004         if (netdev->flags & IFF_PROMISC) {
2005                 jme->reg_rxmcs |= RXMCS_ALLFRAME;
2006         } else if (netdev->flags & IFF_ALLMULTI) {
2007                 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
2008         } else if (netdev->flags & IFF_MULTICAST) {
2009                 struct netdev_hw_addr *ha;
2010                 int bit_nr;
2011
2012                 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
2013                 netdev_for_each_mc_addr(ha, netdev) {
2014                         bit_nr = ether_crc(ETH_ALEN, ha->addr) & 0x3F;
2015                         mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2016                 }
2017
2018                 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2019                 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2020         }
2021
2022         wmb();
2023         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2024
2025         spin_unlock_bh(&jme->rxmcs_lock);
2026 }
2027
2028 static int
2029 jme_change_mtu(struct net_device *netdev, int new_mtu)
2030 {
2031         struct jme_adapter *jme = netdev_priv(netdev);
2032
2033         if (new_mtu == jme->old_mtu)
2034                 return 0;
2035
2036         if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2037                 ((new_mtu) < IPV6_MIN_MTU))
2038                 return -EINVAL;
2039
2040         if (new_mtu > 4000) {
2041                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2042                 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2043                 jme_restart_rx_engine(jme);
2044         } else {
2045                 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2046                 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2047                 jme_restart_rx_engine(jme);
2048         }
2049
2050         if (new_mtu > 1900) {
2051                 netdev->features &= ~(NETIF_F_HW_CSUM |
2052                                 NETIF_F_TSO |
2053                                 NETIF_F_TSO6);
2054         } else {
2055                 if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
2056                         netdev->features |= NETIF_F_HW_CSUM;
2057                 if (test_bit(JME_FLAG_TSO, &jme->flags))
2058                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2059         }
2060
2061         netdev->mtu = new_mtu;
2062         jme_reset_link(jme);
2063
2064         return 0;
2065 }
2066
2067 static void
2068 jme_tx_timeout(struct net_device *netdev)
2069 {
2070         struct jme_adapter *jme = netdev_priv(netdev);
2071
2072         jme->phylink = 0;
2073         jme_reset_phy_processor(jme);
2074         if (test_bit(JME_FLAG_SSET, &jme->flags))
2075                 jme_set_settings(netdev, &jme->old_ecmd);
2076
2077         /*
2078          * Force to Reset the link again
2079          */
2080         jme_reset_link(jme);
2081 }
2082
2083 static inline void jme_pause_rx(struct jme_adapter *jme)
2084 {
2085         atomic_dec(&jme->link_changing);
2086
2087         jme_set_rx_pcc(jme, PCC_OFF);
2088         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2089                 JME_NAPI_DISABLE(jme);
2090         } else {
2091                 tasklet_disable(&jme->rxclean_task);
2092                 tasklet_disable(&jme->rxempty_task);
2093         }
2094 }
2095
2096 static inline void jme_resume_rx(struct jme_adapter *jme)
2097 {
2098         struct dynpcc_info *dpi = &(jme->dpi);
2099
2100         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2101                 JME_NAPI_ENABLE(jme);
2102         } else {
2103                 tasklet_hi_enable(&jme->rxclean_task);
2104                 tasklet_hi_enable(&jme->rxempty_task);
2105         }
2106         dpi->cur                = PCC_P1;
2107         dpi->attempt            = PCC_P1;
2108         dpi->cnt                = 0;
2109         jme_set_rx_pcc(jme, PCC_P1);
2110
2111         atomic_inc(&jme->link_changing);
2112 }
2113
2114 static void
2115 jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2116 {
2117         struct jme_adapter *jme = netdev_priv(netdev);
2118
2119         jme_pause_rx(jme);
2120         jme->vlgrp = grp;
2121         jme_resume_rx(jme);
2122 }
2123
2124 static void
2125 jme_get_drvinfo(struct net_device *netdev,
2126                      struct ethtool_drvinfo *info)
2127 {
2128         struct jme_adapter *jme = netdev_priv(netdev);
2129
2130         strcpy(info->driver, DRV_NAME);
2131         strcpy(info->version, DRV_VERSION);
2132         strcpy(info->bus_info, pci_name(jme->pdev));
2133 }
2134
2135 static int
2136 jme_get_regs_len(struct net_device *netdev)
2137 {
2138         return JME_REG_LEN;
2139 }
2140
2141 static void
2142 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2143 {
2144         int i;
2145
2146         for (i = 0 ; i < len ; i += 4)
2147                 p[i >> 2] = jread32(jme, reg + i);
2148 }
2149
2150 static void
2151 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2152 {
2153         int i;
2154         u16 *p16 = (u16 *)p;
2155
2156         for (i = 0 ; i < reg_nr ; ++i)
2157                 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2158 }
2159
2160 static void
2161 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2162 {
2163         struct jme_adapter *jme = netdev_priv(netdev);
2164         u32 *p32 = (u32 *)p;
2165
2166         memset(p, 0xFF, JME_REG_LEN);
2167
2168         regs->version = 1;
2169         mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2170
2171         p32 += 0x100 >> 2;
2172         mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2173
2174         p32 += 0x100 >> 2;
2175         mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2176
2177         p32 += 0x100 >> 2;
2178         mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2179
2180         p32 += 0x100 >> 2;
2181         mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2182 }
2183
2184 static int
2185 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2186 {
2187         struct jme_adapter *jme = netdev_priv(netdev);
2188
2189         ecmd->tx_coalesce_usecs = PCC_TX_TO;
2190         ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2191
2192         if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2193                 ecmd->use_adaptive_rx_coalesce = false;
2194                 ecmd->rx_coalesce_usecs = 0;
2195                 ecmd->rx_max_coalesced_frames = 0;
2196                 return 0;
2197         }
2198
2199         ecmd->use_adaptive_rx_coalesce = true;
2200
2201         switch (jme->dpi.cur) {
2202         case PCC_P1:
2203                 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2204                 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2205                 break;
2206         case PCC_P2:
2207                 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2208                 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2209                 break;
2210         case PCC_P3:
2211                 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2212                 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2213                 break;
2214         default:
2215                 break;
2216         }
2217
2218         return 0;
2219 }
2220
2221 static int
2222 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2223 {
2224         struct jme_adapter *jme = netdev_priv(netdev);
2225         struct dynpcc_info *dpi = &(jme->dpi);
2226
2227         if (netif_running(netdev))
2228                 return -EBUSY;
2229
2230         if (ecmd->use_adaptive_rx_coalesce &&
2231             test_bit(JME_FLAG_POLL, &jme->flags)) {
2232                 clear_bit(JME_FLAG_POLL, &jme->flags);
2233                 jme->jme_rx = netif_rx;
2234                 jme->jme_vlan_rx = vlan_hwaccel_rx;
2235                 dpi->cur                = PCC_P1;
2236                 dpi->attempt            = PCC_P1;
2237                 dpi->cnt                = 0;
2238                 jme_set_rx_pcc(jme, PCC_P1);
2239                 jme_interrupt_mode(jme);
2240         } else if (!(ecmd->use_adaptive_rx_coalesce) &&
2241                    !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2242                 set_bit(JME_FLAG_POLL, &jme->flags);
2243                 jme->jme_rx = netif_receive_skb;
2244                 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2245                 jme_interrupt_mode(jme);
2246         }
2247
2248         return 0;
2249 }
2250
2251 static void
2252 jme_get_pauseparam(struct net_device *netdev,
2253                         struct ethtool_pauseparam *ecmd)
2254 {
2255         struct jme_adapter *jme = netdev_priv(netdev);
2256         u32 val;
2257
2258         ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2259         ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2260
2261         spin_lock_bh(&jme->phy_lock);
2262         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2263         spin_unlock_bh(&jme->phy_lock);
2264
2265         ecmd->autoneg =
2266                 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2267 }
2268
2269 static int
2270 jme_set_pauseparam(struct net_device *netdev,
2271                         struct ethtool_pauseparam *ecmd)
2272 {
2273         struct jme_adapter *jme = netdev_priv(netdev);
2274         u32 val;
2275
2276         if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2277                 (ecmd->tx_pause != 0)) {
2278
2279                 if (ecmd->tx_pause)
2280                         jme->reg_txpfc |= TXPFC_PF_EN;
2281                 else
2282                         jme->reg_txpfc &= ~TXPFC_PF_EN;
2283
2284                 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2285         }
2286
2287         spin_lock_bh(&jme->rxmcs_lock);
2288         if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2289                 (ecmd->rx_pause != 0)) {
2290
2291                 if (ecmd->rx_pause)
2292                         jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2293                 else
2294                         jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2295
2296                 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2297         }
2298         spin_unlock_bh(&jme->rxmcs_lock);
2299
2300         spin_lock_bh(&jme->phy_lock);
2301         val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2302         if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2303                 (ecmd->autoneg != 0)) {
2304
2305                 if (ecmd->autoneg)
2306                         val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2307                 else
2308                         val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2309
2310                 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2311                                 MII_ADVERTISE, val);
2312         }
2313         spin_unlock_bh(&jme->phy_lock);
2314
2315         return 0;
2316 }
2317
2318 static void
2319 jme_get_wol(struct net_device *netdev,
2320                 struct ethtool_wolinfo *wol)
2321 {
2322         struct jme_adapter *jme = netdev_priv(netdev);
2323
2324         wol->supported = WAKE_MAGIC | WAKE_PHY;
2325
2326         wol->wolopts = 0;
2327
2328         if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2329                 wol->wolopts |= WAKE_PHY;
2330
2331         if (jme->reg_pmcs & PMCS_MFEN)
2332                 wol->wolopts |= WAKE_MAGIC;
2333
2334 }
2335
2336 static int
2337 jme_set_wol(struct net_device *netdev,
2338                 struct ethtool_wolinfo *wol)
2339 {
2340         struct jme_adapter *jme = netdev_priv(netdev);
2341
2342         if (wol->wolopts & (WAKE_MAGICSECURE |
2343                                 WAKE_UCAST |
2344                                 WAKE_MCAST |
2345                                 WAKE_BCAST |
2346                                 WAKE_ARP))
2347                 return -EOPNOTSUPP;
2348
2349         jme->reg_pmcs = 0;
2350
2351         if (wol->wolopts & WAKE_PHY)
2352                 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2353
2354         if (wol->wolopts & WAKE_MAGIC)
2355                 jme->reg_pmcs |= PMCS_MFEN;
2356
2357         jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2358
2359         return 0;
2360 }
2361
2362 static int
2363 jme_get_settings(struct net_device *netdev,
2364                      struct ethtool_cmd *ecmd)
2365 {
2366         struct jme_adapter *jme = netdev_priv(netdev);
2367         int rc;
2368
2369         spin_lock_bh(&jme->phy_lock);
2370         rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2371         spin_unlock_bh(&jme->phy_lock);
2372         return rc;
2373 }
2374
2375 static int
2376 jme_set_settings(struct net_device *netdev,
2377                      struct ethtool_cmd *ecmd)
2378 {
2379         struct jme_adapter *jme = netdev_priv(netdev);
2380         int rc, fdc = 0;
2381
2382         if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2383                 return -EINVAL;
2384
2385         if (jme->mii_if.force_media &&
2386         ecmd->autoneg != AUTONEG_ENABLE &&
2387         (jme->mii_if.full_duplex != ecmd->duplex))
2388                 fdc = 1;
2389
2390         spin_lock_bh(&jme->phy_lock);
2391         rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2392         spin_unlock_bh(&jme->phy_lock);
2393
2394         if (!rc && fdc)
2395                 jme_reset_link(jme);
2396
2397         if (!rc) {
2398                 set_bit(JME_FLAG_SSET, &jme->flags);
2399                 jme->old_ecmd = *ecmd;
2400         }
2401
2402         return rc;
2403 }
2404
2405 static u32
2406 jme_get_link(struct net_device *netdev)
2407 {
2408         struct jme_adapter *jme = netdev_priv(netdev);
2409         return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2410 }
2411
2412 static u32
2413 jme_get_msglevel(struct net_device *netdev)
2414 {
2415         struct jme_adapter *jme = netdev_priv(netdev);
2416         return jme->msg_enable;
2417 }
2418
2419 static void
2420 jme_set_msglevel(struct net_device *netdev, u32 value)
2421 {
2422         struct jme_adapter *jme = netdev_priv(netdev);
2423         jme->msg_enable = value;
2424 }
2425
2426 static u32
2427 jme_get_rx_csum(struct net_device *netdev)
2428 {
2429         struct jme_adapter *jme = netdev_priv(netdev);
2430         return jme->reg_rxmcs & RXMCS_CHECKSUM;
2431 }
2432
2433 static int
2434 jme_set_rx_csum(struct net_device *netdev, u32 on)
2435 {
2436         struct jme_adapter *jme = netdev_priv(netdev);
2437
2438         spin_lock_bh(&jme->rxmcs_lock);
2439         if (on)
2440                 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2441         else
2442                 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2443         jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2444         spin_unlock_bh(&jme->rxmcs_lock);
2445
2446         return 0;
2447 }
2448
2449 static int
2450 jme_set_tx_csum(struct net_device *netdev, u32 on)
2451 {
2452         struct jme_adapter *jme = netdev_priv(netdev);
2453
2454         if (on) {
2455                 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2456                 if (netdev->mtu <= 1900)
2457                         netdev->features |= NETIF_F_HW_CSUM;
2458         } else {
2459                 clear_bit(JME_FLAG_TXCSUM, &jme->flags);
2460                 netdev->features &= ~NETIF_F_HW_CSUM;
2461         }
2462
2463         return 0;
2464 }
2465
2466 static int
2467 jme_set_tso(struct net_device *netdev, u32 on)
2468 {
2469         struct jme_adapter *jme = netdev_priv(netdev);
2470
2471         if (on) {
2472                 set_bit(JME_FLAG_TSO, &jme->flags);
2473                 if (netdev->mtu <= 1900)
2474                         netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2475         } else {
2476                 clear_bit(JME_FLAG_TSO, &jme->flags);
2477                 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
2478         }
2479
2480         return 0;
2481 }
2482
2483 static int
2484 jme_nway_reset(struct net_device *netdev)
2485 {
2486         struct jme_adapter *jme = netdev_priv(netdev);
2487         jme_restart_an(jme);
2488         return 0;
2489 }
2490
2491 static u8
2492 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2493 {
2494         u32 val;
2495         int to;
2496
2497         val = jread32(jme, JME_SMBCSR);
2498         to = JME_SMB_BUSY_TIMEOUT;
2499         while ((val & SMBCSR_BUSY) && --to) {
2500                 msleep(1);
2501                 val = jread32(jme, JME_SMBCSR);
2502         }
2503         if (!to) {
2504                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2505                 return 0xFF;
2506         }
2507
2508         jwrite32(jme, JME_SMBINTF,
2509                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2510                 SMBINTF_HWRWN_READ |
2511                 SMBINTF_HWCMD);
2512
2513         val = jread32(jme, JME_SMBINTF);
2514         to = JME_SMB_BUSY_TIMEOUT;
2515         while ((val & SMBINTF_HWCMD) && --to) {
2516                 msleep(1);
2517                 val = jread32(jme, JME_SMBINTF);
2518         }
2519         if (!to) {
2520                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2521                 return 0xFF;
2522         }
2523
2524         return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2525 }
2526
2527 static void
2528 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2529 {
2530         u32 val;
2531         int to;
2532
2533         val = jread32(jme, JME_SMBCSR);
2534         to = JME_SMB_BUSY_TIMEOUT;
2535         while ((val & SMBCSR_BUSY) && --to) {
2536                 msleep(1);
2537                 val = jread32(jme, JME_SMBCSR);
2538         }
2539         if (!to) {
2540                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2541                 return;
2542         }
2543
2544         jwrite32(jme, JME_SMBINTF,
2545                 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2546                 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2547                 SMBINTF_HWRWN_WRITE |
2548                 SMBINTF_HWCMD);
2549
2550         val = jread32(jme, JME_SMBINTF);
2551         to = JME_SMB_BUSY_TIMEOUT;
2552         while ((val & SMBINTF_HWCMD) && --to) {
2553                 msleep(1);
2554                 val = jread32(jme, JME_SMBINTF);
2555         }
2556         if (!to) {
2557                 netif_err(jme, hw, jme->dev, "SMB Bus Busy.\n");
2558                 return;
2559         }
2560
2561         mdelay(2);
2562 }
2563
2564 static int
2565 jme_get_eeprom_len(struct net_device *netdev)
2566 {
2567         struct jme_adapter *jme = netdev_priv(netdev);
2568         u32 val;
2569         val = jread32(jme, JME_SMBCSR);
2570         return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2571 }
2572
2573 static int
2574 jme_get_eeprom(struct net_device *netdev,
2575                 struct ethtool_eeprom *eeprom, u8 *data)
2576 {
2577         struct jme_adapter *jme = netdev_priv(netdev);
2578         int i, offset = eeprom->offset, len = eeprom->len;
2579
2580         /*
2581          * ethtool will check the boundary for us
2582          */
2583         eeprom->magic = JME_EEPROM_MAGIC;
2584         for (i = 0 ; i < len ; ++i)
2585                 data[i] = jme_smb_read(jme, i + offset);
2586
2587         return 0;
2588 }
2589
2590 static int
2591 jme_set_eeprom(struct net_device *netdev,
2592                 struct ethtool_eeprom *eeprom, u8 *data)
2593 {
2594         struct jme_adapter *jme = netdev_priv(netdev);
2595         int i, offset = eeprom->offset, len = eeprom->len;
2596
2597         if (eeprom->magic != JME_EEPROM_MAGIC)
2598                 return -EINVAL;
2599
2600         /*
2601          * ethtool will check the boundary for us
2602          */
2603         for (i = 0 ; i < len ; ++i)
2604                 jme_smb_write(jme, i + offset, data[i]);
2605
2606         return 0;
2607 }
2608
2609 static const struct ethtool_ops jme_ethtool_ops = {
2610         .get_drvinfo            = jme_get_drvinfo,
2611         .get_regs_len           = jme_get_regs_len,
2612         .get_regs               = jme_get_regs,
2613         .get_coalesce           = jme_get_coalesce,
2614         .set_coalesce           = jme_set_coalesce,
2615         .get_pauseparam         = jme_get_pauseparam,
2616         .set_pauseparam         = jme_set_pauseparam,
2617         .get_wol                = jme_get_wol,
2618         .set_wol                = jme_set_wol,
2619         .get_settings           = jme_get_settings,
2620         .set_settings           = jme_set_settings,
2621         .get_link               = jme_get_link,
2622         .get_msglevel           = jme_get_msglevel,
2623         .set_msglevel           = jme_set_msglevel,
2624         .get_rx_csum            = jme_get_rx_csum,
2625         .set_rx_csum            = jme_set_rx_csum,
2626         .set_tx_csum            = jme_set_tx_csum,
2627         .set_tso                = jme_set_tso,
2628         .set_sg                 = ethtool_op_set_sg,
2629         .nway_reset             = jme_nway_reset,
2630         .get_eeprom_len         = jme_get_eeprom_len,
2631         .get_eeprom             = jme_get_eeprom,
2632         .set_eeprom             = jme_set_eeprom,
2633 };
2634
2635 static int
2636 jme_pci_dma64(struct pci_dev *pdev)
2637 {
2638         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2639             !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
2640                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
2641                         return 1;
2642
2643         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2644             !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
2645                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
2646                         return 1;
2647
2648         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
2649                 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2650                         return 0;
2651
2652         return -1;
2653 }
2654
2655 static inline void
2656 jme_phy_init(struct jme_adapter *jme)
2657 {
2658         u16 reg26;
2659
2660         reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2661         jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2662 }
2663
2664 static inline void
2665 jme_check_hw_ver(struct jme_adapter *jme)
2666 {
2667         u32 chipmode;
2668
2669         chipmode = jread32(jme, JME_CHIPMODE);
2670
2671         jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2672         jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2673 }
2674
2675 static const struct net_device_ops jme_netdev_ops = {
2676         .ndo_open               = jme_open,
2677         .ndo_stop               = jme_close,
2678         .ndo_validate_addr      = eth_validate_addr,
2679         .ndo_start_xmit         = jme_start_xmit,
2680         .ndo_set_mac_address    = jme_set_macaddr,
2681         .ndo_set_multicast_list = jme_set_multi,
2682         .ndo_change_mtu         = jme_change_mtu,
2683         .ndo_tx_timeout         = jme_tx_timeout,
2684         .ndo_vlan_rx_register   = jme_vlan_rx_register,
2685 };
2686
2687 static int __devinit
2688 jme_init_one(struct pci_dev *pdev,
2689              const struct pci_device_id *ent)
2690 {
2691         int rc = 0, using_dac, i;
2692         struct net_device *netdev;
2693         struct jme_adapter *jme;
2694         u16 bmcr, bmsr;
2695         u32 apmc;
2696
2697         /*
2698          * set up PCI device basics
2699          */
2700         rc = pci_enable_device(pdev);
2701         if (rc) {
2702                 jeprintk(pdev, "Cannot enable PCI device.\n");
2703                 goto err_out;
2704         }
2705
2706         using_dac = jme_pci_dma64(pdev);
2707         if (using_dac < 0) {
2708                 jeprintk(pdev, "Cannot set PCI DMA Mask.\n");
2709                 rc = -EIO;
2710                 goto err_out_disable_pdev;
2711         }
2712
2713         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2714                 jeprintk(pdev, "No PCI resource region found.\n");
2715                 rc = -ENOMEM;
2716                 goto err_out_disable_pdev;
2717         }
2718
2719         rc = pci_request_regions(pdev, DRV_NAME);
2720         if (rc) {
2721                 jeprintk(pdev, "Cannot obtain PCI resource region.\n");
2722                 goto err_out_disable_pdev;
2723         }
2724
2725         pci_set_master(pdev);
2726
2727         /*
2728          * alloc and init net device
2729          */
2730         netdev = alloc_etherdev(sizeof(*jme));
2731         if (!netdev) {
2732                 jeprintk(pdev, "Cannot allocate netdev structure.\n");
2733                 rc = -ENOMEM;
2734                 goto err_out_release_regions;
2735         }
2736         netdev->netdev_ops = &jme_netdev_ops;
2737         netdev->ethtool_ops             = &jme_ethtool_ops;
2738         netdev->watchdog_timeo          = TX_TIMEOUT;
2739         netdev->features                =       NETIF_F_HW_CSUM |
2740                                                 NETIF_F_SG |
2741                                                 NETIF_F_TSO |
2742                                                 NETIF_F_TSO6 |
2743                                                 NETIF_F_HW_VLAN_TX |
2744                                                 NETIF_F_HW_VLAN_RX;
2745         if (using_dac)
2746                 netdev->features        |=      NETIF_F_HIGHDMA;
2747
2748         SET_NETDEV_DEV(netdev, &pdev->dev);
2749         pci_set_drvdata(pdev, netdev);
2750
2751         /*
2752          * init adapter info
2753          */
2754         jme = netdev_priv(netdev);
2755         jme->pdev = pdev;
2756         jme->dev = netdev;
2757         jme->jme_rx = netif_rx;
2758         jme->jme_vlan_rx = vlan_hwaccel_rx;
2759         jme->old_mtu = netdev->mtu = 1500;
2760         jme->phylink = 0;
2761         jme->tx_ring_size = 1 << 10;
2762         jme->tx_ring_mask = jme->tx_ring_size - 1;
2763         jme->tx_wake_threshold = 1 << 9;
2764         jme->rx_ring_size = 1 << 9;
2765         jme->rx_ring_mask = jme->rx_ring_size - 1;
2766         jme->msg_enable = JME_DEF_MSG_ENABLE;
2767         jme->regs = ioremap(pci_resource_start(pdev, 0),
2768                              pci_resource_len(pdev, 0));
2769         if (!(jme->regs)) {
2770                 jeprintk(pdev, "Mapping PCI resource region error.\n");
2771                 rc = -ENOMEM;
2772                 goto err_out_free_netdev;
2773         }
2774
2775         if (no_pseudohp) {
2776                 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2777                 jwrite32(jme, JME_APMC, apmc);
2778         } else if (force_pseudohp) {
2779                 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2780                 jwrite32(jme, JME_APMC, apmc);
2781         }
2782
2783         NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2784
2785         spin_lock_init(&jme->phy_lock);
2786         spin_lock_init(&jme->macaddr_lock);
2787         spin_lock_init(&jme->rxmcs_lock);
2788
2789         atomic_set(&jme->link_changing, 1);
2790         atomic_set(&jme->rx_cleaning, 1);
2791         atomic_set(&jme->tx_cleaning, 1);
2792         atomic_set(&jme->rx_empty, 1);
2793
2794         tasklet_init(&jme->pcc_task,
2795                      jme_pcc_tasklet,
2796                      (unsigned long) jme);
2797         tasklet_init(&jme->linkch_task,
2798                      jme_link_change_tasklet,
2799                      (unsigned long) jme);
2800         tasklet_init(&jme->txclean_task,
2801                      jme_tx_clean_tasklet,
2802                      (unsigned long) jme);
2803         tasklet_init(&jme->rxclean_task,
2804                      jme_rx_clean_tasklet,
2805                      (unsigned long) jme);
2806         tasklet_init(&jme->rxempty_task,
2807                      jme_rx_empty_tasklet,
2808                      (unsigned long) jme);
2809         tasklet_disable_nosync(&jme->linkch_task);
2810         tasklet_disable_nosync(&jme->txclean_task);
2811         tasklet_disable_nosync(&jme->rxclean_task);
2812         tasklet_disable_nosync(&jme->rxempty_task);
2813         jme->dpi.cur = PCC_P1;
2814
2815         jme->reg_ghc = 0;
2816         jme->reg_rxcs = RXCS_DEFAULT;
2817         jme->reg_rxmcs = RXMCS_DEFAULT;
2818         jme->reg_txpfc = 0;
2819         jme->reg_pmcs = PMCS_MFEN;
2820         set_bit(JME_FLAG_TXCSUM, &jme->flags);
2821         set_bit(JME_FLAG_TSO, &jme->flags);
2822
2823         /*
2824          * Get Max Read Req Size from PCI Config Space
2825          */
2826         pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2827         jme->mrrs &= PCI_DCSR_MRRS_MASK;
2828         switch (jme->mrrs) {
2829         case MRRS_128B:
2830                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2831                 break;
2832         case MRRS_256B:
2833                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2834                 break;
2835         default:
2836                 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2837                 break;
2838         }
2839
2840         /*
2841          * Must check before reset_mac_processor
2842          */
2843         jme_check_hw_ver(jme);
2844         jme->mii_if.dev = netdev;
2845         if (jme->fpgaver) {
2846                 jme->mii_if.phy_id = 0;
2847                 for (i = 1 ; i < 32 ; ++i) {
2848                         bmcr = jme_mdio_read(netdev, i, MII_BMCR);
2849                         bmsr = jme_mdio_read(netdev, i, MII_BMSR);
2850                         if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
2851                                 jme->mii_if.phy_id = i;
2852                                 break;
2853                         }
2854                 }
2855
2856                 if (!jme->mii_if.phy_id) {
2857                         rc = -EIO;
2858                         jeprintk(pdev, "Can not find phy_id.\n");
2859                          goto err_out_unmap;
2860                 }
2861
2862                 jme->reg_ghc |= GHC_LINK_POLL;
2863         } else {
2864                 jme->mii_if.phy_id = 1;
2865         }
2866         if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
2867                 jme->mii_if.supports_gmii = true;
2868         else
2869                 jme->mii_if.supports_gmii = false;
2870         jme->mii_if.mdio_read = jme_mdio_read;
2871         jme->mii_if.mdio_write = jme_mdio_write;
2872
2873         jme_clear_pm(jme);
2874         jme_set_phyfifoa(jme);
2875         pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev);
2876         if (!jme->fpgaver)
2877                 jme_phy_init(jme);
2878         jme_phy_off(jme);
2879
2880         /*
2881          * Reset MAC processor and reload EEPROM for MAC Address
2882          */
2883         jme_reset_mac_processor(jme);
2884         rc = jme_reload_eeprom(jme);
2885         if (rc) {
2886                 jeprintk(pdev,
2887                         "Reload eeprom for reading MAC Address error.\n");
2888                 goto err_out_unmap;
2889         }
2890         jme_load_macaddr(netdev);
2891
2892         /*
2893          * Tell stack that we are not ready to work until open()
2894          */
2895         netif_carrier_off(netdev);
2896         netif_stop_queue(netdev);
2897
2898         /*
2899          * Register netdev
2900          */
2901         rc = register_netdev(netdev);
2902         if (rc) {
2903                 jeprintk(pdev, "Cannot register net device.\n");
2904                 goto err_out_unmap;
2905         }
2906
2907         netif_info(jme, probe, jme->dev, "%s%s ver:%x rev:%x macaddr:%pM\n",
2908                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
2909                    "JMC250 Gigabit Ethernet" :
2910                    (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
2911                    "JMC260 Fast Ethernet" : "Unknown",
2912                    (jme->fpgaver != 0) ? " (FPGA)" : "",
2913                    (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
2914                    jme->rev, netdev->dev_addr);
2915
2916         return 0;
2917
2918 err_out_unmap:
2919         iounmap(jme->regs);
2920 err_out_free_netdev:
2921         pci_set_drvdata(pdev, NULL);
2922         free_netdev(netdev);
2923 err_out_release_regions:
2924         pci_release_regions(pdev);
2925 err_out_disable_pdev:
2926         pci_disable_device(pdev);
2927 err_out:
2928         return rc;
2929 }
2930
2931 static void __devexit
2932 jme_remove_one(struct pci_dev *pdev)
2933 {
2934         struct net_device *netdev = pci_get_drvdata(pdev);
2935         struct jme_adapter *jme = netdev_priv(netdev);
2936
2937         unregister_netdev(netdev);
2938         iounmap(jme->regs);
2939         pci_set_drvdata(pdev, NULL);
2940         free_netdev(netdev);
2941         pci_release_regions(pdev);
2942         pci_disable_device(pdev);
2943
2944 }
2945
2946 #ifdef CONFIG_PM
2947 static int
2948 jme_suspend(struct pci_dev *pdev, pm_message_t state)
2949 {
2950         struct net_device *netdev = pci_get_drvdata(pdev);
2951         struct jme_adapter *jme = netdev_priv(netdev);
2952
2953         atomic_dec(&jme->link_changing);
2954
2955         netif_device_detach(netdev);
2956         netif_stop_queue(netdev);
2957         jme_stop_irq(jme);
2958
2959         tasklet_disable(&jme->txclean_task);
2960         tasklet_disable(&jme->rxclean_task);
2961         tasklet_disable(&jme->rxempty_task);
2962
2963         if (netif_carrier_ok(netdev)) {
2964                 if (test_bit(JME_FLAG_POLL, &jme->flags))
2965                         jme_polling_mode(jme);
2966
2967                 jme_stop_pcc_timer(jme);
2968                 jme_reset_ghc_speed(jme);
2969                 jme_disable_rx_engine(jme);
2970                 jme_disable_tx_engine(jme);
2971                 jme_reset_mac_processor(jme);
2972                 jme_free_rx_resources(jme);
2973                 jme_free_tx_resources(jme);
2974                 netif_carrier_off(netdev);
2975                 jme->phylink = 0;
2976         }
2977
2978         tasklet_enable(&jme->txclean_task);
2979         tasklet_hi_enable(&jme->rxclean_task);
2980         tasklet_hi_enable(&jme->rxempty_task);
2981
2982         pci_save_state(pdev);
2983         if (jme->reg_pmcs) {
2984                 jme_set_100m_half(jme);
2985
2986                 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2987                         jme_wait_link(jme);
2988
2989                 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2990
2991                 pci_enable_wake(pdev, PCI_D3cold, true);
2992         } else {
2993                 jme_phy_off(jme);
2994         }
2995         pci_set_power_state(pdev, PCI_D3cold);
2996
2997         return 0;
2998 }
2999
3000 static int
3001 jme_resume(struct pci_dev *pdev)
3002 {
3003         struct net_device *netdev = pci_get_drvdata(pdev);
3004         struct jme_adapter *jme = netdev_priv(netdev);
3005
3006         jme_clear_pm(jme);
3007         pci_restore_state(pdev);
3008
3009         if (test_bit(JME_FLAG_SSET, &jme->flags))
3010                 jme_set_settings(netdev, &jme->old_ecmd);
3011         else
3012                 jme_reset_phy_processor(jme);
3013
3014         jme_start_irq(jme);
3015         netif_device_attach(netdev);
3016
3017         atomic_inc(&jme->link_changing);
3018
3019         jme_reset_link(jme);
3020
3021         return 0;
3022 }
3023 #endif
3024
3025 static DEFINE_PCI_DEVICE_TABLE(jme_pci_tbl) = {
3026         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3027         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3028         { }
3029 };
3030
3031 static struct pci_driver jme_driver = {
3032         .name           = DRV_NAME,
3033         .id_table       = jme_pci_tbl,
3034         .probe          = jme_init_one,
3035         .remove         = __devexit_p(jme_remove_one),
3036 #ifdef CONFIG_PM
3037         .suspend        = jme_suspend,
3038         .resume         = jme_resume,
3039 #endif /* CONFIG_PM */
3040 };
3041
3042 static int __init
3043 jme_init_module(void)
3044 {
3045         printk(KERN_INFO PFX "JMicron JMC2XX ethernet "
3046                "driver version %s\n", DRV_VERSION);
3047         return pci_register_driver(&jme_driver);
3048 }
3049
3050 static void __exit
3051 jme_cleanup_module(void)
3052 {
3053         pci_unregister_driver(&jme_driver);
3054 }
3055
3056 module_init(jme_init_module);
3057 module_exit(jme_cleanup_module);
3058
3059 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3060 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3061 MODULE_LICENSE("GPL");
3062 MODULE_VERSION(DRV_VERSION);
3063 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3064