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
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/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/skbuff.h>
28 #include <linux/spinlock.h>
33 #include <asm/uaccess.h>
34 #include <linux/module.h>
35 #include <linux/crc32.h>
36 #include <asm/types.h>
37 #include <asm/uaccess.h>
38 #include <linux/ethtool.h>
39 #include <linux/mii.h>
40 #include <linux/phy.h>
44 extern void gfar_start(struct net_device *dev);
45 extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
47 #define GFAR_MAX_COAL_USECS 0xffff
48 #define GFAR_MAX_COAL_FRAMES 0xff
49 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
51 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
52 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
53 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
54 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
55 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
56 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
58 static char stat_gstrings[][ETH_GSTRING_LEN] = {
59 "rx-dropped-by-kernel",
60 "rx-large-frame-errors",
61 "rx-short-frame-errors",
62 "rx-non-octet-errors",
67 "rx-truncated-frames",
71 "rx-skb-missing-errors",
74 "tx-rx-65-127-frames",
75 "tx-rx-128-255-frames",
76 "tx-rx-256-511-frames",
77 "tx-rx-512-1023-frames",
78 "tx-rx-1024-1518-frames",
79 "tx-rx-1519-1522-good-vlan",
83 "receive-multicast-packet",
84 "receive-broadcast-packet",
85 "rx-control-frame-packets",
86 "rx-pause-frame-packets",
89 "rx-frame-length-error",
91 "rx-carrier-sense-error",
92 "rx-undersize-packets",
93 "rx-oversize-packets",
94 "rx-fragmented-frames",
99 "tx-multicast-packets",
100 "tx-broadcast-packets",
101 "tx-pause-control-frames",
102 "tx-deferral-packets",
103 "tx-excessive-deferral-packets",
104 "tx-single-collision-packets",
105 "tx-multiple-collision-packets",
106 "tx-late-collision-packets",
107 "tx-excessive-collision-packets",
108 "tx-total-collision",
114 "tx-oversize-frames",
115 "tx-undersize-frames",
116 "tx-fragmented-frames",
119 /* Fill in a buffer with the strings which correspond to the
121 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
123 struct gfar_private *priv = netdev_priv(dev);
125 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
126 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
128 memcpy(buf, stat_gstrings,
129 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
132 /* Fill in an array of 64-bit statistics from various sources.
133 * This array will be appended to the end of the ethtool_stats
134 * structure, and returned to user space
136 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
139 struct gfar_private *priv = netdev_priv(dev);
140 u64 *extra = (u64 *) & priv->extra_stats;
142 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
143 u32 __iomem *rmon = (u32 __iomem *) & priv->regs->rmon;
144 struct gfar_stats *stats = (struct gfar_stats *) buf;
146 for (i = 0; i < GFAR_RMON_LEN; i++)
147 stats->rmon[i] = (u64) gfar_read(&rmon[i]);
149 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
150 stats->extra[i] = extra[i];
152 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
156 /* Returns the number of stats (and their corresponding strings) */
157 static int gfar_stats_count(struct net_device *dev)
159 struct gfar_private *priv = netdev_priv(dev);
161 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
162 return GFAR_STATS_LEN;
164 return GFAR_EXTRA_STATS_LEN;
167 /* Fills in the drvinfo structure with some basic info */
168 static void gfar_gdrvinfo(struct net_device *dev, struct
169 ethtool_drvinfo *drvinfo)
171 strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
172 strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
173 strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
174 strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
175 drvinfo->n_stats = GFAR_STATS_LEN;
176 drvinfo->testinfo_len = 0;
177 drvinfo->regdump_len = 0;
178 drvinfo->eedump_len = 0;
182 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
184 struct gfar_private *priv = netdev_priv(dev);
185 struct phy_device *phydev = priv->phydev;
190 return phy_ethtool_sset(phydev, cmd);
194 /* Return the current settings in the ethtool_cmd structure */
195 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
197 struct gfar_private *priv = netdev_priv(dev);
198 struct phy_device *phydev = priv->phydev;
203 cmd->maxtxpkt = priv->txcount;
204 cmd->maxrxpkt = priv->rxcount;
206 return phy_ethtool_gset(phydev, cmd);
209 /* Return the length of the register structure */
210 static int gfar_reglen(struct net_device *dev)
212 return sizeof (struct gfar);
215 /* Return a dump of the GFAR register space */
216 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
219 struct gfar_private *priv = netdev_priv(dev);
220 u32 __iomem *theregs = (u32 __iomem *) priv->regs;
221 u32 *buf = (u32 *) regbuf;
223 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
224 buf[i] = gfar_read(&theregs[i]);
227 /* Convert microseconds to ethernet clock ticks, which changes
228 * depending on what speed the controller is running at */
229 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
233 /* The timer is different, depending on the interface speed */
234 switch (priv->phydev->speed) {
236 count = GFAR_GBIT_TIME;
239 count = GFAR_100_TIME;
243 count = GFAR_10_TIME;
247 /* Make sure we return a number greater than 0
249 return ((usecs * 1000 + count - 1) / count);
252 /* Convert ethernet clock ticks to microseconds */
253 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
257 /* The timer is different, depending on the interface speed */
258 switch (priv->phydev->speed) {
260 count = GFAR_GBIT_TIME;
263 count = GFAR_100_TIME;
267 count = GFAR_10_TIME;
271 /* Make sure we return a number greater than 0 */
272 /* if ticks is > 0 */
273 return ((ticks * count) / 1000);
276 /* Get the coalescing parameters, and put them in the cvals
278 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
280 struct gfar_private *priv = netdev_priv(dev);
282 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
285 if (NULL == priv->phydev)
288 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
289 cvals->rx_max_coalesced_frames = priv->rxcount;
291 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
292 cvals->tx_max_coalesced_frames = priv->txcount;
294 cvals->use_adaptive_rx_coalesce = 0;
295 cvals->use_adaptive_tx_coalesce = 0;
297 cvals->pkt_rate_low = 0;
298 cvals->rx_coalesce_usecs_low = 0;
299 cvals->rx_max_coalesced_frames_low = 0;
300 cvals->tx_coalesce_usecs_low = 0;
301 cvals->tx_max_coalesced_frames_low = 0;
303 /* When the packet rate is below pkt_rate_high but above
304 * pkt_rate_low (both measured in packets per second) the
305 * normal {rx,tx}_* coalescing parameters are used.
308 /* When the packet rate is (measured in packets per second)
309 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
312 cvals->pkt_rate_high = 0;
313 cvals->rx_coalesce_usecs_high = 0;
314 cvals->rx_max_coalesced_frames_high = 0;
315 cvals->tx_coalesce_usecs_high = 0;
316 cvals->tx_max_coalesced_frames_high = 0;
318 /* How often to do adaptive coalescing packet rate sampling,
319 * measured in seconds. Must not be zero.
321 cvals->rate_sample_interval = 0;
326 /* Change the coalescing values.
327 * Both cvals->*_usecs and cvals->*_frames have to be > 0
328 * in order for coalescing to be active
330 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
332 struct gfar_private *priv = netdev_priv(dev);
334 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
337 /* Set up rx coalescing */
338 if ((cvals->rx_coalesce_usecs == 0) ||
339 (cvals->rx_max_coalesced_frames == 0))
340 priv->rxcoalescing = 0;
342 priv->rxcoalescing = 1;
344 if (NULL == priv->phydev)
347 /* Check the bounds of the values */
348 if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
349 pr_info("Coalescing is limited to %d microseconds\n",
350 GFAR_MAX_COAL_USECS);
354 if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
355 pr_info("Coalescing is limited to %d frames\n",
356 GFAR_MAX_COAL_FRAMES);
360 priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
361 priv->rxcount = cvals->rx_max_coalesced_frames;
363 /* Set up tx coalescing */
364 if ((cvals->tx_coalesce_usecs == 0) ||
365 (cvals->tx_max_coalesced_frames == 0))
366 priv->txcoalescing = 0;
368 priv->txcoalescing = 1;
370 /* Check the bounds of the values */
371 if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
372 pr_info("Coalescing is limited to %d microseconds\n",
373 GFAR_MAX_COAL_USECS);
377 if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
378 pr_info("Coalescing is limited to %d frames\n",
379 GFAR_MAX_COAL_FRAMES);
383 priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
384 priv->txcount = cvals->tx_max_coalesced_frames;
386 if (priv->rxcoalescing)
387 gfar_write(&priv->regs->rxic,
388 mk_ic_value(priv->rxcount, priv->rxtime));
390 gfar_write(&priv->regs->rxic, 0);
392 if (priv->txcoalescing)
393 gfar_write(&priv->regs->txic,
394 mk_ic_value(priv->txcount, priv->txtime));
396 gfar_write(&priv->regs->txic, 0);
401 /* Fills in rvals with the current ring parameters. Currently,
402 * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
403 * jumbo are ignored by the driver */
404 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
406 struct gfar_private *priv = netdev_priv(dev);
408 rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
409 rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
410 rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
411 rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
413 /* Values changeable by the user. The valid values are
414 * in the range 1 to the "*_max_pending" counterpart above.
416 rvals->rx_pending = priv->rx_ring_size;
417 rvals->rx_mini_pending = priv->rx_ring_size;
418 rvals->rx_jumbo_pending = priv->rx_ring_size;
419 rvals->tx_pending = priv->tx_ring_size;
422 /* Change the current ring parameters, stopping the controller if
423 * necessary so that we don't mess things up while we're in
424 * motion. We wait for the ring to be clean before reallocating
426 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
428 struct gfar_private *priv = netdev_priv(dev);
431 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
434 if (!is_power_of_2(rvals->rx_pending)) {
435 printk("%s: Ring sizes must be a power of 2\n",
440 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
443 if (!is_power_of_2(rvals->tx_pending)) {
444 printk("%s: Ring sizes must be a power of 2\n",
449 if (dev->flags & IFF_UP) {
452 /* Halt TX and RX, and process the frames which
453 * have already been received */
454 spin_lock_irqsave(&priv->txlock, flags);
455 spin_lock(&priv->rxlock);
458 gfar_clean_rx_ring(dev, priv->rx_ring_size);
460 spin_unlock(&priv->rxlock);
461 spin_unlock_irqrestore(&priv->txlock, flags);
463 /* Now we take down the rings to rebuild them */
467 /* Change the size */
468 priv->rx_ring_size = rvals->rx_pending;
469 priv->tx_ring_size = rvals->tx_pending;
471 /* Rebuild the rings with the new size */
472 if (dev->flags & IFF_UP)
473 err = startup_gfar(dev);
478 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
480 struct gfar_private *priv = netdev_priv(dev);
483 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
486 if (dev->flags & IFF_UP) {
489 /* Halt TX and RX, and process the frames which
490 * have already been received */
491 spin_lock_irqsave(&priv->txlock, flags);
492 spin_lock(&priv->rxlock);
495 gfar_clean_rx_ring(dev, priv->rx_ring_size);
497 spin_unlock(&priv->rxlock);
498 spin_unlock_irqrestore(&priv->txlock, flags);
500 /* Now we take down the rings to rebuild them */
504 priv->rx_csum_enable = data;
506 if (dev->flags & IFF_UP)
507 err = startup_gfar(dev);
512 static uint32_t gfar_get_rx_csum(struct net_device *dev)
514 struct gfar_private *priv = netdev_priv(dev);
516 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
519 return priv->rx_csum_enable;
522 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
525 struct gfar_private *priv = netdev_priv(dev);
527 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
530 spin_lock_irqsave(&priv->txlock, flags);
534 dev->features |= NETIF_F_IP_CSUM;
536 dev->features &= ~NETIF_F_IP_CSUM;
539 spin_unlock_irqrestore(&priv->txlock, flags);
544 static uint32_t gfar_get_tx_csum(struct net_device *dev)
546 struct gfar_private *priv = netdev_priv(dev);
548 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
551 return (dev->features & NETIF_F_IP_CSUM) != 0;
554 static uint32_t gfar_get_msglevel(struct net_device *dev)
556 struct gfar_private *priv = netdev_priv(dev);
557 return priv->msg_enable;
560 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
562 struct gfar_private *priv = netdev_priv(dev);
563 priv->msg_enable = data;
567 const struct ethtool_ops gfar_ethtool_ops = {
568 .get_settings = gfar_gsettings,
569 .set_settings = gfar_ssettings,
570 .get_drvinfo = gfar_gdrvinfo,
571 .get_regs_len = gfar_reglen,
572 .get_regs = gfar_get_regs,
573 .get_link = ethtool_op_get_link,
574 .get_coalesce = gfar_gcoalesce,
575 .set_coalesce = gfar_scoalesce,
576 .get_ringparam = gfar_gringparam,
577 .set_ringparam = gfar_sringparam,
578 .get_strings = gfar_gstrings,
579 .get_stats_count = gfar_stats_count,
580 .get_ethtool_stats = gfar_fill_stats,
581 .get_rx_csum = gfar_get_rx_csum,
582 .get_tx_csum = gfar_get_tx_csum,
583 .set_rx_csum = gfar_set_rx_csum,
584 .set_tx_csum = gfar_set_tx_csum,
585 .get_msglevel = gfar_get_msglevel,
586 .set_msglevel = gfar_set_msglevel,