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 <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/phy.h>
43 extern void gfar_start(struct net_device *dev);
44 extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
46 #define GFAR_MAX_COAL_USECS 0xffff
47 #define GFAR_MAX_COAL_FRAMES 0xff
48 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
50 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
51 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
52 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
53 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
54 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
55 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
57 static char stat_gstrings[][ETH_GSTRING_LEN] = {
58 "rx-dropped-by-kernel",
59 "rx-large-frame-errors",
60 "rx-short-frame-errors",
61 "rx-non-octet-errors",
66 "rx-truncated-frames",
70 "rx-skb-missing-errors",
73 "tx-rx-65-127-frames",
74 "tx-rx-128-255-frames",
75 "tx-rx-256-511-frames",
76 "tx-rx-512-1023-frames",
77 "tx-rx-1024-1518-frames",
78 "tx-rx-1519-1522-good-vlan",
82 "receive-multicast-packet",
83 "receive-broadcast-packet",
84 "rx-control-frame-packets",
85 "rx-pause-frame-packets",
88 "rx-frame-length-error",
90 "rx-carrier-sense-error",
91 "rx-undersize-packets",
92 "rx-oversize-packets",
93 "rx-fragmented-frames",
98 "tx-multicast-packets",
99 "tx-broadcast-packets",
100 "tx-pause-control-frames",
101 "tx-deferral-packets",
102 "tx-excessive-deferral-packets",
103 "tx-single-collision-packets",
104 "tx-multiple-collision-packets",
105 "tx-late-collision-packets",
106 "tx-excessive-collision-packets",
107 "tx-total-collision",
113 "tx-oversize-frames",
114 "tx-undersize-frames",
115 "tx-fragmented-frames",
118 /* Fill in a buffer with the strings which correspond to the
120 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
122 struct gfar_private *priv = netdev_priv(dev);
124 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
125 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
127 memcpy(buf, stat_gstrings,
128 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
131 /* Fill in an array of 64-bit statistics from various sources.
132 * This array will be appended to the end of the ethtool_stats
133 * structure, and returned to user space
135 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
138 struct gfar_private *priv = netdev_priv(dev);
139 u64 *extra = (u64 *) & priv->extra_stats;
141 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
142 u32 __iomem *rmon = (u32 __iomem *) & priv->regs->rmon;
143 struct gfar_stats *stats = (struct gfar_stats *) buf;
145 for (i = 0; i < GFAR_RMON_LEN; i++)
146 stats->rmon[i] = (u64) gfar_read(&rmon[i]);
148 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
149 stats->extra[i] = extra[i];
151 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
155 /* Returns the number of stats (and their corresponding strings) */
156 static int gfar_stats_count(struct net_device *dev)
158 struct gfar_private *priv = netdev_priv(dev);
160 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
161 return GFAR_STATS_LEN;
163 return GFAR_EXTRA_STATS_LEN;
166 /* Fills in the drvinfo structure with some basic info */
167 static void gfar_gdrvinfo(struct net_device *dev, struct
168 ethtool_drvinfo *drvinfo)
170 strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
171 strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
172 strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
173 strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
174 drvinfo->n_stats = GFAR_STATS_LEN;
175 drvinfo->testinfo_len = 0;
176 drvinfo->regdump_len = 0;
177 drvinfo->eedump_len = 0;
181 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
183 struct gfar_private *priv = netdev_priv(dev);
184 struct phy_device *phydev = priv->phydev;
189 return phy_ethtool_sset(phydev, cmd);
193 /* Return the current settings in the ethtool_cmd structure */
194 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
196 struct gfar_private *priv = netdev_priv(dev);
197 struct phy_device *phydev = priv->phydev;
202 cmd->maxtxpkt = priv->txcount;
203 cmd->maxrxpkt = priv->rxcount;
205 return phy_ethtool_gset(phydev, cmd);
208 /* Return the length of the register structure */
209 static int gfar_reglen(struct net_device *dev)
211 return sizeof (struct gfar);
214 /* Return a dump of the GFAR register space */
215 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
218 struct gfar_private *priv = netdev_priv(dev);
219 u32 __iomem *theregs = (u32 __iomem *) priv->regs;
220 u32 *buf = (u32 *) regbuf;
222 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
223 buf[i] = gfar_read(&theregs[i]);
226 /* Convert microseconds to ethernet clock ticks, which changes
227 * depending on what speed the controller is running at */
228 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
232 /* The timer is different, depending on the interface speed */
233 switch (priv->phydev->speed) {
235 count = GFAR_GBIT_TIME;
238 count = GFAR_100_TIME;
242 count = GFAR_10_TIME;
246 /* Make sure we return a number greater than 0
248 return ((usecs * 1000 + count - 1) / count);
251 /* Convert ethernet clock ticks to microseconds */
252 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
256 /* The timer is different, depending on the interface speed */
257 switch (priv->phydev->speed) {
259 count = GFAR_GBIT_TIME;
262 count = GFAR_100_TIME;
266 count = GFAR_10_TIME;
270 /* Make sure we return a number greater than 0 */
271 /* if ticks is > 0 */
272 return ((ticks * count) / 1000);
275 /* Get the coalescing parameters, and put them in the cvals
277 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
279 struct gfar_private *priv = netdev_priv(dev);
281 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
284 if (NULL == priv->phydev)
287 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
288 cvals->rx_max_coalesced_frames = priv->rxcount;
290 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
291 cvals->tx_max_coalesced_frames = priv->txcount;
293 cvals->use_adaptive_rx_coalesce = 0;
294 cvals->use_adaptive_tx_coalesce = 0;
296 cvals->pkt_rate_low = 0;
297 cvals->rx_coalesce_usecs_low = 0;
298 cvals->rx_max_coalesced_frames_low = 0;
299 cvals->tx_coalesce_usecs_low = 0;
300 cvals->tx_max_coalesced_frames_low = 0;
302 /* When the packet rate is below pkt_rate_high but above
303 * pkt_rate_low (both measured in packets per second) the
304 * normal {rx,tx}_* coalescing parameters are used.
307 /* When the packet rate is (measured in packets per second)
308 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
311 cvals->pkt_rate_high = 0;
312 cvals->rx_coalesce_usecs_high = 0;
313 cvals->rx_max_coalesced_frames_high = 0;
314 cvals->tx_coalesce_usecs_high = 0;
315 cvals->tx_max_coalesced_frames_high = 0;
317 /* How often to do adaptive coalescing packet rate sampling,
318 * measured in seconds. Must not be zero.
320 cvals->rate_sample_interval = 0;
325 /* Change the coalescing values.
326 * Both cvals->*_usecs and cvals->*_frames have to be > 0
327 * in order for coalescing to be active
329 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
331 struct gfar_private *priv = netdev_priv(dev);
333 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
336 /* Set up rx coalescing */
337 if ((cvals->rx_coalesce_usecs == 0) ||
338 (cvals->rx_max_coalesced_frames == 0))
339 priv->rxcoalescing = 0;
341 priv->rxcoalescing = 1;
343 if (NULL == priv->phydev)
346 /* Check the bounds of the values */
347 if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
348 pr_info("Coalescing is limited to %d microseconds\n",
349 GFAR_MAX_COAL_USECS);
353 if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
354 pr_info("Coalescing is limited to %d frames\n",
355 GFAR_MAX_COAL_FRAMES);
359 priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
360 priv->rxcount = cvals->rx_max_coalesced_frames;
362 /* Set up tx coalescing */
363 if ((cvals->tx_coalesce_usecs == 0) ||
364 (cvals->tx_max_coalesced_frames == 0))
365 priv->txcoalescing = 0;
367 priv->txcoalescing = 1;
369 /* Check the bounds of the values */
370 if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
371 pr_info("Coalescing is limited to %d microseconds\n",
372 GFAR_MAX_COAL_USECS);
376 if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
377 pr_info("Coalescing is limited to %d frames\n",
378 GFAR_MAX_COAL_FRAMES);
382 priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
383 priv->txcount = cvals->tx_max_coalesced_frames;
385 if (priv->rxcoalescing)
386 gfar_write(&priv->regs->rxic,
387 mk_ic_value(priv->rxcount, priv->rxtime));
389 gfar_write(&priv->regs->rxic, 0);
391 if (priv->txcoalescing)
392 gfar_write(&priv->regs->txic,
393 mk_ic_value(priv->txcount, priv->txtime));
395 gfar_write(&priv->regs->txic, 0);
400 /* Fills in rvals with the current ring parameters. Currently,
401 * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
402 * jumbo are ignored by the driver */
403 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
405 struct gfar_private *priv = netdev_priv(dev);
407 rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
408 rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
409 rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
410 rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
412 /* Values changeable by the user. The valid values are
413 * in the range 1 to the "*_max_pending" counterpart above.
415 rvals->rx_pending = priv->rx_ring_size;
416 rvals->rx_mini_pending = priv->rx_ring_size;
417 rvals->rx_jumbo_pending = priv->rx_ring_size;
418 rvals->tx_pending = priv->tx_ring_size;
421 /* Change the current ring parameters, stopping the controller if
422 * necessary so that we don't mess things up while we're in
423 * motion. We wait for the ring to be clean before reallocating
425 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
427 struct gfar_private *priv = netdev_priv(dev);
430 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
433 if (!is_power_of_2(rvals->rx_pending)) {
434 printk("%s: Ring sizes must be a power of 2\n",
439 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
442 if (!is_power_of_2(rvals->tx_pending)) {
443 printk("%s: Ring sizes must be a power of 2\n",
448 if (dev->flags & IFF_UP) {
451 /* Halt TX and RX, and process the frames which
452 * have already been received */
453 spin_lock_irqsave(&priv->txlock, flags);
454 spin_lock(&priv->rxlock);
457 gfar_clean_rx_ring(dev, priv->rx_ring_size);
459 spin_unlock(&priv->rxlock);
460 spin_unlock_irqrestore(&priv->txlock, flags);
462 /* Now we take down the rings to rebuild them */
466 /* Change the size */
467 priv->rx_ring_size = rvals->rx_pending;
468 priv->tx_ring_size = rvals->tx_pending;
470 /* Rebuild the rings with the new size */
471 if (dev->flags & IFF_UP)
472 err = startup_gfar(dev);
477 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
479 struct gfar_private *priv = netdev_priv(dev);
482 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
485 if (dev->flags & IFF_UP) {
488 /* Halt TX and RX, and process the frames which
489 * have already been received */
490 spin_lock_irqsave(&priv->txlock, flags);
491 spin_lock(&priv->rxlock);
494 gfar_clean_rx_ring(dev, priv->rx_ring_size);
496 spin_unlock(&priv->rxlock);
497 spin_unlock_irqrestore(&priv->txlock, flags);
499 /* Now we take down the rings to rebuild them */
503 priv->rx_csum_enable = data;
505 if (dev->flags & IFF_UP)
506 err = startup_gfar(dev);
511 static uint32_t gfar_get_rx_csum(struct net_device *dev)
513 struct gfar_private *priv = netdev_priv(dev);
515 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
518 return priv->rx_csum_enable;
521 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
524 struct gfar_private *priv = netdev_priv(dev);
526 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
529 spin_lock_irqsave(&priv->txlock, flags);
533 dev->features |= NETIF_F_IP_CSUM;
535 dev->features &= ~NETIF_F_IP_CSUM;
538 spin_unlock_irqrestore(&priv->txlock, flags);
543 static uint32_t gfar_get_tx_csum(struct net_device *dev)
545 struct gfar_private *priv = netdev_priv(dev);
547 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
550 return (dev->features & NETIF_F_IP_CSUM) != 0;
553 static uint32_t gfar_get_msglevel(struct net_device *dev)
555 struct gfar_private *priv = netdev_priv(dev);
556 return priv->msg_enable;
559 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
561 struct gfar_private *priv = netdev_priv(dev);
562 priv->msg_enable = data;
566 const struct ethtool_ops gfar_ethtool_ops = {
567 .get_settings = gfar_gsettings,
568 .set_settings = gfar_ssettings,
569 .get_drvinfo = gfar_gdrvinfo,
570 .get_regs_len = gfar_reglen,
571 .get_regs = gfar_get_regs,
572 .get_link = ethtool_op_get_link,
573 .get_coalesce = gfar_gcoalesce,
574 .set_coalesce = gfar_scoalesce,
575 .get_ringparam = gfar_gringparam,
576 .set_ringparam = gfar_sringparam,
577 .get_strings = gfar_gstrings,
578 .get_stats_count = gfar_stats_count,
579 .get_ethtool_stats = gfar_fill_stats,
580 .get_rx_csum = gfar_get_rx_csum,
581 .get_tx_csum = gfar_get_tx_csum,
582 .set_rx_csum = gfar_set_rx_csum,
583 .set_tx_csum = gfar_set_tx_csum,
584 .get_msglevel = gfar_get_msglevel,
585 .set_msglevel = gfar_set_msglevel,