[PATCH] gianfar: Add support enhanced TSEC features on the MPC 8548
[linux-2.6.git] / drivers / net / gianfar_ethtool.c
1 /*
2  *  drivers/net/gianfar_ethtool.c
3  *
4  *  Gianfar Ethernet Driver
5  *  Ethtool support for Gianfar Enet
6  *  Based on e1000 ethtool support
7  *
8  *  Author: Andy Fleming
9  *  Maintainer: Kumar Gala (kumar.gala@freescale.com)
10  *
11  *  Copyright (c) 2003,2004 Freescale Semiconductor, Inc.
12  *
13  *  This software may be used and distributed according to 
14  *  the terms of the GNU Public License, Version 2, incorporated herein 
15  *  by reference.
16  */
17
18 #include <linux/config.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/string.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/skbuff.h>
30 #include <linux/spinlock.h>
31 #include <linux/mm.h>
32
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36 #include <linux/module.h>
37 #include <linux/version.h>
38 #include <linux/crc32.h>
39 #include <asm/types.h>
40 #include <asm/uaccess.h>
41 #include <linux/ethtool.h>
42
43 #include "gianfar.h"
44
45 #define is_power_of_2(x)        ((x) != 0 && (((x) & ((x) - 1)) == 0))
46
47 extern int startup_gfar(struct net_device *dev);
48 extern void stop_gfar(struct net_device *dev);
49 extern void gfar_halt(struct net_device *dev);
50 extern void gfar_start(struct net_device *dev);
51 extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
52
53 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
54                      u64 * buf);
55 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
56 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
57 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
58 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
59 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
60 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
61
62 static char stat_gstrings[][ETH_GSTRING_LEN] = {
63         "rx-dropped-by-kernel",
64         "rx-large-frame-errors",
65         "rx-short-frame-errors",
66         "rx-non-octet-errors",
67         "rx-crc-errors",
68         "rx-overrun-errors",
69         "rx-busy-errors",
70         "rx-babbling-errors",
71         "rx-truncated-frames",
72         "ethernet-bus-error",
73         "tx-babbling-errors",
74         "tx-underrun-errors",
75         "rx-skb-missing-errors",
76         "tx-timeout-errors",
77         "tx-rx-64-frames",
78         "tx-rx-65-127-frames",
79         "tx-rx-128-255-frames",
80         "tx-rx-256-511-frames",
81         "tx-rx-512-1023-frames",
82         "tx-rx-1024-1518-frames",
83         "tx-rx-1519-1522-good-vlan",
84         "rx-bytes",
85         "rx-packets",
86         "rx-fcs-errors",
87         "receive-multicast-packet",
88         "receive-broadcast-packet",
89         "rx-control-frame-packets",
90         "rx-pause-frame-packets",
91         "rx-unknown-op-code",
92         "rx-alignment-error",
93         "rx-frame-length-error",
94         "rx-code-error",
95         "rx-carrier-sense-error",
96         "rx-undersize-packets",
97         "rx-oversize-packets",
98         "rx-fragmented-frames",
99         "rx-jabber-frames",
100         "rx-dropped-frames",
101         "tx-byte-counter",
102         "tx-packets",
103         "tx-multicast-packets",
104         "tx-broadcast-packets",
105         "tx-pause-control-frames",
106         "tx-deferral-packets",
107         "tx-excessive-deferral-packets",
108         "tx-single-collision-packets",
109         "tx-multiple-collision-packets",
110         "tx-late-collision-packets",
111         "tx-excessive-collision-packets",
112         "tx-total-collision",
113         "reserved",
114         "tx-dropped-frames",
115         "tx-jabber-frames",
116         "tx-fcs-errors",
117         "tx-control-frames",
118         "tx-oversize-frames",
119         "tx-undersize-frames",
120         "tx-fragmented-frames",
121 };
122
123 /* Fill in a buffer with the strings which correspond to the
124  * stats */
125 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
126 {
127         struct gfar_private *priv = netdev_priv(dev);
128         
129         if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
130                 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
131         else
132                 memcpy(buf, stat_gstrings,
133                                 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
134 }
135
136 /* Fill in an array of 64-bit statistics from various sources.
137  * This array will be appended to the end of the ethtool_stats
138  * structure, and returned to user space
139  */
140 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
141 {
142         int i;
143         struct gfar_private *priv = netdev_priv(dev);
144         u64 *extra = (u64 *) & priv->extra_stats;
145
146         if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
147                 u32 *rmon = (u32 *) & priv->regs->rmon;
148                 struct gfar_stats *stats = (struct gfar_stats *) buf;
149
150                 for (i = 0; i < GFAR_RMON_LEN; i++)
151                         stats->rmon[i] = (u64) (rmon[i]);
152
153                 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
154                         stats->extra[i] = extra[i];
155         } else
156                 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
157                         buf[i] = extra[i];
158 }
159
160 /* Returns the number of stats (and their corresponding strings) */
161 static int gfar_stats_count(struct net_device *dev)
162 {
163         struct gfar_private *priv = netdev_priv(dev);
164
165         if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
166                 return GFAR_STATS_LEN;
167         else
168                 return GFAR_EXTRA_STATS_LEN;
169 }
170
171 /* Fills in the drvinfo structure with some basic info */
172 static void gfar_gdrvinfo(struct net_device *dev, struct
173               ethtool_drvinfo *drvinfo)
174 {
175         strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
176         strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
177         strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
178         strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
179         drvinfo->n_stats = GFAR_STATS_LEN;
180         drvinfo->testinfo_len = 0;
181         drvinfo->regdump_len = 0;
182         drvinfo->eedump_len = 0;
183 }
184
185 /* Return the current settings in the ethtool_cmd structure */
186 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
187 {
188         struct gfar_private *priv = netdev_priv(dev);
189         uint gigabit_support = 
190                 priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
191                         SUPPORTED_1000baseT_Full : 0;
192         uint gigabit_advert = 
193                 priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
194                         ADVERTISED_1000baseT_Full: 0;
195
196         cmd->supported = (SUPPORTED_10baseT_Half
197                           | SUPPORTED_100baseT_Half
198                           | SUPPORTED_100baseT_Full
199                           | gigabit_support | SUPPORTED_Autoneg);
200
201         /* For now, we always advertise everything */
202         cmd->advertising = (ADVERTISED_10baseT_Half
203                             | ADVERTISED_100baseT_Half
204                             | ADVERTISED_100baseT_Full
205                             | gigabit_advert | ADVERTISED_Autoneg);
206
207         cmd->speed = priv->mii_info->speed;
208         cmd->duplex = priv->mii_info->duplex;
209         cmd->port = PORT_MII;
210         cmd->phy_address = priv->mii_info->mii_id;
211         cmd->transceiver = XCVR_EXTERNAL;
212         cmd->autoneg = AUTONEG_ENABLE;
213         cmd->maxtxpkt = priv->txcount;
214         cmd->maxrxpkt = priv->rxcount;
215
216         return 0;
217 }
218
219 /* Return the length of the register structure */
220 static int gfar_reglen(struct net_device *dev)
221 {
222         return sizeof (struct gfar);
223 }
224
225 /* Return a dump of the GFAR register space */
226 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
227 {
228         int i;
229         struct gfar_private *priv = netdev_priv(dev);
230         u32 *theregs = (u32 *) priv->regs;
231         u32 *buf = (u32 *) regbuf;
232
233         for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
234                 buf[i] = theregs[i];
235 }
236
237 /* Convert microseconds to ethernet clock ticks, which changes
238  * depending on what speed the controller is running at */
239 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
240 {
241         unsigned int count;
242
243         /* The timer is different, depending on the interface speed */
244         switch (priv->mii_info->speed) {
245         case 1000:
246                 count = GFAR_GBIT_TIME;
247                 break;
248         case 100:
249                 count = GFAR_100_TIME;
250                 break;
251         case 10:
252         default:
253                 count = GFAR_10_TIME;
254                 break;
255         }
256
257         /* Make sure we return a number greater than 0
258          * if usecs > 0 */
259         return ((usecs * 1000 + count - 1) / count);
260 }
261
262 /* Convert ethernet clock ticks to microseconds */
263 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
264 {
265         unsigned int count;
266
267         /* The timer is different, depending on the interface speed */
268         switch (priv->mii_info->speed) {
269         case 1000:
270                 count = GFAR_GBIT_TIME;
271                 break;
272         case 100:
273                 count = GFAR_100_TIME;
274                 break;
275         case 10:
276         default:
277                 count = GFAR_10_TIME;
278                 break;
279         }
280
281         /* Make sure we return a number greater than 0 */
282         /* if ticks is > 0 */
283         return ((ticks * count) / 1000);
284 }
285
286 /* Get the coalescing parameters, and put them in the cvals
287  * structure.  */
288 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
289 {
290         struct gfar_private *priv = netdev_priv(dev);
291         
292         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
293                 return -EOPNOTSUPP;
294
295         cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
296         cvals->rx_max_coalesced_frames = priv->rxcount;
297
298         cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
299         cvals->tx_max_coalesced_frames = priv->txcount;
300
301         cvals->use_adaptive_rx_coalesce = 0;
302         cvals->use_adaptive_tx_coalesce = 0;
303
304         cvals->pkt_rate_low = 0;
305         cvals->rx_coalesce_usecs_low = 0;
306         cvals->rx_max_coalesced_frames_low = 0;
307         cvals->tx_coalesce_usecs_low = 0;
308         cvals->tx_max_coalesced_frames_low = 0;
309
310         /* When the packet rate is below pkt_rate_high but above
311          * pkt_rate_low (both measured in packets per second) the
312          * normal {rx,tx}_* coalescing parameters are used.
313          */
314
315         /* When the packet rate is (measured in packets per second)
316          * is above pkt_rate_high, the {rx,tx}_*_high parameters are
317          * used.
318          */
319         cvals->pkt_rate_high = 0;
320         cvals->rx_coalesce_usecs_high = 0;
321         cvals->rx_max_coalesced_frames_high = 0;
322         cvals->tx_coalesce_usecs_high = 0;
323         cvals->tx_max_coalesced_frames_high = 0;
324
325         /* How often to do adaptive coalescing packet rate sampling,
326          * measured in seconds.  Must not be zero.
327          */
328         cvals->rate_sample_interval = 0;
329
330         return 0;
331 }
332
333 /* Change the coalescing values.
334  * Both cvals->*_usecs and cvals->*_frames have to be > 0
335  * in order for coalescing to be active
336  */
337 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
338 {
339         struct gfar_private *priv = netdev_priv(dev);
340
341         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
342                 return -EOPNOTSUPP;
343
344         /* Set up rx coalescing */
345         if ((cvals->rx_coalesce_usecs == 0) ||
346             (cvals->rx_max_coalesced_frames == 0))
347                 priv->rxcoalescing = 0;
348         else
349                 priv->rxcoalescing = 1;
350
351         priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
352         priv->rxcount = cvals->rx_max_coalesced_frames;
353
354         /* Set up tx coalescing */
355         if ((cvals->tx_coalesce_usecs == 0) ||
356             (cvals->tx_max_coalesced_frames == 0))
357                 priv->txcoalescing = 0;
358         else
359                 priv->txcoalescing = 1;
360
361         priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
362         priv->txcount = cvals->tx_max_coalesced_frames;
363
364         if (priv->rxcoalescing)
365                 gfar_write(&priv->regs->rxic,
366                            mk_ic_value(priv->rxcount, priv->rxtime));
367         else
368                 gfar_write(&priv->regs->rxic, 0);
369
370         if (priv->txcoalescing)
371                 gfar_write(&priv->regs->txic,
372                            mk_ic_value(priv->txcount, priv->txtime));
373         else
374                 gfar_write(&priv->regs->txic, 0);
375
376         return 0;
377 }
378
379 /* Fills in rvals with the current ring parameters.  Currently,
380  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
381  * jumbo are ignored by the driver */
382 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
383 {
384         struct gfar_private *priv = netdev_priv(dev);
385
386         rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
387         rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
388         rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
389         rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
390
391         /* Values changeable by the user.  The valid values are
392          * in the range 1 to the "*_max_pending" counterpart above.
393          */
394         rvals->rx_pending = priv->rx_ring_size;
395         rvals->rx_mini_pending = priv->rx_ring_size;
396         rvals->rx_jumbo_pending = priv->rx_ring_size;
397         rvals->tx_pending = priv->tx_ring_size;
398 }
399
400 /* Change the current ring parameters, stopping the controller if
401  * necessary so that we don't mess things up while we're in
402  * motion.  We wait for the ring to be clean before reallocating
403  * the rings. */
404 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
405 {
406         struct gfar_private *priv = netdev_priv(dev);
407         int err = 0;
408
409         if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
410                 return -EINVAL;
411
412         if (!is_power_of_2(rvals->rx_pending)) {
413                 printk("%s: Ring sizes must be a power of 2\n",
414                                 dev->name);
415                 return -EINVAL;
416         }
417
418         if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
419                 return -EINVAL;
420
421         if (!is_power_of_2(rvals->tx_pending)) {
422                 printk("%s: Ring sizes must be a power of 2\n",
423                                 dev->name);
424                 return -EINVAL;
425         }
426
427         if (dev->flags & IFF_UP) {
428                 unsigned long flags;
429
430                 /* Halt TX and RX, and process the frames which
431                  * have already been received */
432                 spin_lock_irqsave(&priv->lock, flags);
433                 gfar_halt(dev);
434                 gfar_clean_rx_ring(dev, priv->rx_ring_size);
435                 spin_unlock_irqrestore(&priv->lock, flags);
436
437                 /* Now we take down the rings to rebuild them */
438                 stop_gfar(dev);
439         }
440
441         /* Change the size */
442         priv->rx_ring_size = rvals->rx_pending;
443         priv->tx_ring_size = rvals->tx_pending;
444
445         /* Rebuild the rings with the new size */
446         if (dev->flags & IFF_UP)
447                 err = startup_gfar(dev);
448
449         return err;
450 }
451
452 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
453 {
454         struct gfar_private *priv = netdev_priv(dev);
455         int err = 0;
456
457         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
458                 return -EOPNOTSUPP;
459
460         if (dev->flags & IFF_UP) {
461                 unsigned long flags;
462
463                 /* Halt TX and RX, and process the frames which
464                  * have already been received */
465                 spin_lock_irqsave(&priv->lock, flags);
466                 gfar_halt(dev);
467                 gfar_clean_rx_ring(dev, priv->rx_ring_size);
468                 spin_unlock_irqrestore(&priv->lock, flags);
469
470                 /* Now we take down the rings to rebuild them */
471                 stop_gfar(dev);
472         }
473
474         priv->rx_csum_enable = data;
475
476         if (dev->flags & IFF_UP)
477                 err = startup_gfar(dev);
478
479         return err;
480 }
481
482 static uint32_t gfar_get_rx_csum(struct net_device *dev)
483 {
484         struct gfar_private *priv = netdev_priv(dev);
485
486         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
487                 return 0;
488
489         return priv->rx_csum_enable;
490 }
491
492 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
493 {
494         unsigned long flags;
495         struct gfar_private *priv = netdev_priv(dev);
496
497         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
498                 return -EOPNOTSUPP;
499
500         spin_lock_irqsave(&priv->lock, flags);
501         gfar_halt(dev);
502
503         if (data)
504                 dev->features |= NETIF_F_IP_CSUM;
505         else
506                 dev->features &= ~NETIF_F_IP_CSUM;
507
508         gfar_start(dev);
509         spin_unlock_irqrestore(&priv->lock, flags);
510
511         return 0;
512 }
513
514 static uint32_t gfar_get_tx_csum(struct net_device *dev)
515 {
516         struct gfar_private *priv = netdev_priv(dev);
517
518         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
519                 return 0;
520
521         return (dev->features & NETIF_F_IP_CSUM) != 0;
522 }
523
524 static uint32_t gfar_get_msglevel(struct net_device *dev)
525 {       
526         struct gfar_private *priv = netdev_priv(dev);
527         return priv->msg_enable;
528 }       
529         
530 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
531 {       
532         struct gfar_private *priv = netdev_priv(dev);
533         priv->msg_enable = data;
534 }
535
536
537 struct ethtool_ops gfar_ethtool_ops = {
538         .get_settings = gfar_gsettings,
539         .get_drvinfo = gfar_gdrvinfo,
540         .get_regs_len = gfar_reglen,
541         .get_regs = gfar_get_regs,
542         .get_link = ethtool_op_get_link,
543         .get_coalesce = gfar_gcoalesce,
544         .set_coalesce = gfar_scoalesce,
545         .get_ringparam = gfar_gringparam,
546         .set_ringparam = gfar_sringparam,
547         .get_strings = gfar_gstrings,
548         .get_stats_count = gfar_stats_count,
549         .get_ethtool_stats = gfar_fill_stats,
550         .get_rx_csum = gfar_get_rx_csum,
551         .get_tx_csum = gfar_get_tx_csum,
552         .set_rx_csum = gfar_set_rx_csum,
553         .set_tx_csum = gfar_set_tx_csum,
554         .get_msglevel = gfar_get_msglevel,
555         .set_msglevel = gfar_set_msglevel,
556 };