2 * drivers/net/gianfar_ethtool.c
4 * Gianfar Ethernet Driver
5 * Ethtool support for Gianfar Enet
6 * Based on e1000 ethtool support
9 * Maintainer: Kumar Gala (kumar.gala@freescale.com)
11 * Copyright (c) 2003,2004 Freescale Semiconductor, Inc.
13 * This software may be used and distributed according to
14 * the terms of the GNU Public License, Version 2, incorporated herein
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>
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>
45 #define is_power_of_2(x) ((x) != 0 && (((x) & ((x) - 1)) == 0))
47 extern int startup_gfar(struct net_device *dev);
48 extern void stop_gfar(struct net_device *dev);
49 extern void gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
51 void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
53 void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
54 int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
55 int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
56 void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
57 int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
58 void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
60 static char stat_gstrings[][ETH_GSTRING_LEN] = {
61 "rx-dropped-by-kernel",
62 "rx-large-frame-errors",
63 "rx-short-frame-errors",
64 "rx-non-octet-errors",
69 "rx-truncated-frames",
73 "rx-skb-missing-errors",
76 "tx-rx-65-127-frames",
77 "tx-rx-128-255-frames",
78 "tx-rx-256-511-frames",
79 "tx-rx-512-1023-frames",
80 "tx-rx-1024-1518-frames",
81 "tx-rx-1519-1522-good-vlan",
85 "receive-multicast-packet",
86 "receive-broadcast-packet",
87 "rx-control-frame-packets",
88 "rx-pause-frame-packets",
91 "rx-frame-length-error",
93 "rx-carrier-sense-error",
94 "rx-undersize-packets",
95 "rx-oversize-packets",
96 "rx-fragmented-frames",
101 "tx-multicast-packets",
102 "tx-broadcast-packets",
103 "tx-pause-control-frames",
104 "tx-deferral-packets",
105 "tx-excessive-deferral-packets",
106 "tx-single-collision-packets",
107 "tx-multiple-collision-packets",
108 "tx-late-collision-packets",
109 "tx-excessive-collision-packets",
110 "tx-total-collision",
116 "tx-oversize-frames",
117 "tx-undersize-frames",
118 "tx-fragmented-frames",
121 /* Fill in an array of 64-bit statistics from various sources.
122 * This array will be appended to the end of the ethtool_stats
123 * structure, and returned to user space
125 void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
128 struct gfar_private *priv = netdev_priv(dev);
129 u32 *rmon = (u32 *) & priv->regs->rmon;
130 u64 *extra = (u64 *) & priv->extra_stats;
131 struct gfar_stats *stats = (struct gfar_stats *) buf;
133 for (i = 0; i < GFAR_RMON_LEN; i++) {
134 stats->rmon[i] = (u64) (rmon[i]);
137 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
138 stats->extra[i] = extra[i];
142 /* Returns the number of stats (and their corresponding strings) */
143 int gfar_stats_count(struct net_device *dev)
145 return GFAR_STATS_LEN;
148 void gfar_gstrings_normon(struct net_device *dev, u32 stringset, u8 * buf)
150 memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
153 void gfar_fill_stats_normon(struct net_device *dev,
154 struct ethtool_stats *dummy, u64 * buf)
157 struct gfar_private *priv = netdev_priv(dev);
158 u64 *extra = (u64 *) & priv->extra_stats;
160 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
166 int gfar_stats_count_normon(struct net_device *dev)
168 return GFAR_EXTRA_STATS_LEN;
170 /* Fills in the drvinfo structure with some basic info */
171 void gfar_gdrvinfo(struct net_device *dev, struct
172 ethtool_drvinfo *drvinfo)
174 strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
175 strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
176 strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
177 strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
178 drvinfo->n_stats = GFAR_STATS_LEN;
179 drvinfo->testinfo_len = 0;
180 drvinfo->regdump_len = 0;
181 drvinfo->eedump_len = 0;
184 /* Return the current settings in the ethtool_cmd structure */
185 int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
187 struct gfar_private *priv = netdev_priv(dev);
188 uint gigabit_support =
189 priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
190 SUPPORTED_1000baseT_Full : 0;
191 uint gigabit_advert =
192 priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
193 ADVERTISED_1000baseT_Full: 0;
195 cmd->supported = (SUPPORTED_10baseT_Half
196 | SUPPORTED_100baseT_Half
197 | SUPPORTED_100baseT_Full
198 | gigabit_support | SUPPORTED_Autoneg);
200 /* For now, we always advertise everything */
201 cmd->advertising = (ADVERTISED_10baseT_Half
202 | ADVERTISED_100baseT_Half
203 | ADVERTISED_100baseT_Full
204 | gigabit_advert | ADVERTISED_Autoneg);
206 cmd->speed = priv->mii_info->speed;
207 cmd->duplex = priv->mii_info->duplex;
208 cmd->port = PORT_MII;
209 cmd->phy_address = priv->mii_info->mii_id;
210 cmd->transceiver = XCVR_EXTERNAL;
211 cmd->autoneg = AUTONEG_ENABLE;
212 cmd->maxtxpkt = priv->txcount;
213 cmd->maxrxpkt = priv->rxcount;
218 /* Return the length of the register structure */
219 int gfar_reglen(struct net_device *dev)
221 return sizeof (struct gfar);
224 /* Return a dump of the GFAR register space */
225 void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
228 struct gfar_private *priv = netdev_priv(dev);
229 u32 *theregs = (u32 *) priv->regs;
230 u32 *buf = (u32 *) regbuf;
232 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
236 /* Fill in a buffer with the strings which correspond to the
238 void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
240 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
243 /* Convert microseconds to ethernet clock ticks, which changes
244 * depending on what speed the controller is running at */
245 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
249 /* The timer is different, depending on the interface speed */
250 switch (priv->mii_info->speed) {
252 count = GFAR_GBIT_TIME;
255 count = GFAR_100_TIME;
259 count = GFAR_10_TIME;
263 /* Make sure we return a number greater than 0
265 return ((usecs * 1000 + count - 1) / count);
268 /* Convert ethernet clock ticks to microseconds */
269 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
273 /* The timer is different, depending on the interface speed */
274 switch (priv->mii_info->speed) {
276 count = GFAR_GBIT_TIME;
279 count = GFAR_100_TIME;
283 count = GFAR_10_TIME;
287 /* Make sure we return a number greater than 0 */
288 /* if ticks is > 0 */
289 return ((ticks * count) / 1000);
292 /* Get the coalescing parameters, and put them in the cvals
294 int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
296 struct gfar_private *priv = netdev_priv(dev);
298 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
299 cvals->rx_max_coalesced_frames = priv->rxcount;
301 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
302 cvals->tx_max_coalesced_frames = priv->txcount;
304 cvals->use_adaptive_rx_coalesce = 0;
305 cvals->use_adaptive_tx_coalesce = 0;
307 cvals->pkt_rate_low = 0;
308 cvals->rx_coalesce_usecs_low = 0;
309 cvals->rx_max_coalesced_frames_low = 0;
310 cvals->tx_coalesce_usecs_low = 0;
311 cvals->tx_max_coalesced_frames_low = 0;
313 /* When the packet rate is below pkt_rate_high but above
314 * pkt_rate_low (both measured in packets per second) the
315 * normal {rx,tx}_* coalescing parameters are used.
318 /* When the packet rate is (measured in packets per second)
319 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
322 cvals->pkt_rate_high = 0;
323 cvals->rx_coalesce_usecs_high = 0;
324 cvals->rx_max_coalesced_frames_high = 0;
325 cvals->tx_coalesce_usecs_high = 0;
326 cvals->tx_max_coalesced_frames_high = 0;
328 /* How often to do adaptive coalescing packet rate sampling,
329 * measured in seconds. Must not be zero.
331 cvals->rate_sample_interval = 0;
336 /* Change the coalescing values.
337 * Both cvals->*_usecs and cvals->*_frames have to be > 0
338 * in order for coalescing to be active
340 int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
342 struct gfar_private *priv = netdev_priv(dev);
344 /* Set up rx coalescing */
345 if ((cvals->rx_coalesce_usecs == 0) ||
346 (cvals->rx_max_coalesced_frames == 0))
347 priv->rxcoalescing = 0;
349 priv->rxcoalescing = 1;
351 priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
352 priv->rxcount = cvals->rx_max_coalesced_frames;
354 /* Set up tx coalescing */
355 if ((cvals->tx_coalesce_usecs == 0) ||
356 (cvals->tx_max_coalesced_frames == 0))
357 priv->txcoalescing = 0;
359 priv->txcoalescing = 1;
361 priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
362 priv->txcount = cvals->tx_max_coalesced_frames;
364 if (priv->rxcoalescing)
365 gfar_write(&priv->regs->rxic,
366 mk_ic_value(priv->rxcount, priv->rxtime));
368 gfar_write(&priv->regs->rxic, 0);
370 if (priv->txcoalescing)
371 gfar_write(&priv->regs->txic,
372 mk_ic_value(priv->txcount, priv->txtime));
374 gfar_write(&priv->regs->txic, 0);
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 void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
384 struct gfar_private *priv = netdev_priv(dev);
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;
391 /* Values changeable by the user. The valid values are
392 * in the range 1 to the "*_max_pending" counterpart above.
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;
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
404 int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
407 struct gfar_private *priv = netdev_priv(dev);
410 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
413 if (!is_power_of_2(rvals->rx_pending)) {
414 printk("%s: Ring sizes must be a power of 2\n",
419 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
422 if (!is_power_of_2(rvals->tx_pending)) {
423 printk("%s: Ring sizes must be a power of 2\n",
428 /* Stop the controller so we don't rx any more frames */
429 /* But first, make sure we clear the bits */
430 tempval = gfar_read(&priv->regs->dmactrl);
431 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
432 gfar_write(&priv->regs->dmactrl, tempval);
434 tempval = gfar_read(&priv->regs->dmactrl);
435 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
436 gfar_write(&priv->regs->dmactrl, tempval);
438 while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
441 /* Note that rx is not clean right now */
444 if (dev->flags & IFF_UP) {
445 /* Tell the driver to process the rest of the frames */
446 gfar_receive(0, (void *) dev, NULL);
448 /* Now wait for it to be done */
449 wait_event_interruptible(priv->rxcleanupq, priv->rxclean);
451 /* Ok, all packets have been handled. Now we bring it down,
452 * change the ring size, and bring it up */
457 priv->rx_ring_size = rvals->rx_pending;
458 priv->tx_ring_size = rvals->tx_pending;
460 if (dev->flags & IFF_UP)
461 err = startup_gfar(dev);
466 struct ethtool_ops gfar_ethtool_ops = {
467 .get_settings = gfar_gsettings,
468 .get_drvinfo = gfar_gdrvinfo,
469 .get_regs_len = gfar_reglen,
470 .get_regs = gfar_get_regs,
471 .get_link = ethtool_op_get_link,
472 .get_coalesce = gfar_gcoalesce,
473 .set_coalesce = gfar_scoalesce,
474 .get_ringparam = gfar_gringparam,
475 .set_ringparam = gfar_sringparam,
476 .get_strings = gfar_gstrings,
477 .get_stats_count = gfar_stats_count,
478 .get_ethtool_stats = gfar_fill_stats,
481 struct ethtool_ops gfar_normon_nocoalesce_ethtool_ops = {
482 .get_settings = gfar_gsettings,
483 .get_drvinfo = gfar_gdrvinfo,
484 .get_regs_len = gfar_reglen,
485 .get_regs = gfar_get_regs,
486 .get_link = ethtool_op_get_link,
487 .get_ringparam = gfar_gringparam,
488 .set_ringparam = gfar_sringparam,
489 .get_strings = gfar_gstrings_normon,
490 .get_stats_count = gfar_stats_count_normon,
491 .get_ethtool_stats = gfar_fill_stats_normon,
494 struct ethtool_ops gfar_nocoalesce_ethtool_ops = {
495 .get_settings = gfar_gsettings,
496 .get_drvinfo = gfar_gdrvinfo,
497 .get_regs_len = gfar_reglen,
498 .get_regs = gfar_get_regs,
499 .get_link = ethtool_op_get_link,
500 .get_ringparam = gfar_gringparam,
501 .set_ringparam = gfar_sringparam,
502 .get_strings = gfar_gstrings,
503 .get_stats_count = gfar_stats_count,
504 .get_ethtool_stats = gfar_fill_stats,
507 struct ethtool_ops gfar_normon_ethtool_ops = {
508 .get_settings = gfar_gsettings,
509 .get_drvinfo = gfar_gdrvinfo,
510 .get_regs_len = gfar_reglen,
511 .get_regs = gfar_get_regs,
512 .get_link = ethtool_op_get_link,
513 .get_coalesce = gfar_gcoalesce,
514 .set_coalesce = gfar_scoalesce,
515 .get_ringparam = gfar_gringparam,
516 .set_ringparam = gfar_sringparam,
517 .get_strings = gfar_gstrings_normon,
518 .get_stats_count = gfar_stats_count_normon,
519 .get_ethtool_stats = gfar_fill_stats_normon,
522 struct ethtool_ops *gfar_op_array[] = {
524 &gfar_normon_ethtool_ops,
525 &gfar_nocoalesce_ethtool_ops,
526 &gfar_normon_nocoalesce_ethtool_ops