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_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);
53 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
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);
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",
71 "rx-truncated-frames",
75 "rx-skb-missing-errors",
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",
87 "receive-multicast-packet",
88 "receive-broadcast-packet",
89 "rx-control-frame-packets",
90 "rx-pause-frame-packets",
93 "rx-frame-length-error",
95 "rx-carrier-sense-error",
96 "rx-undersize-packets",
97 "rx-oversize-packets",
98 "rx-fragmented-frames",
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",
118 "tx-oversize-frames",
119 "tx-undersize-frames",
120 "tx-fragmented-frames",
123 /* Fill in a buffer with the strings which correspond to the
125 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
127 struct gfar_private *priv = netdev_priv(dev);
129 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
130 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
132 memcpy(buf, stat_gstrings,
133 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
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
140 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
143 struct gfar_private *priv = netdev_priv(dev);
144 u64 *extra = (u64 *) & priv->extra_stats;
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;
150 for (i = 0; i < GFAR_RMON_LEN; i++)
151 stats->rmon[i] = (u64) (rmon[i]);
153 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
154 stats->extra[i] = extra[i];
156 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
160 /* Returns the number of stats (and their corresponding strings) */
161 static int gfar_stats_count(struct net_device *dev)
163 struct gfar_private *priv = netdev_priv(dev);
165 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
166 return GFAR_STATS_LEN;
168 return GFAR_EXTRA_STATS_LEN;
171 /* Fills in the drvinfo structure with some basic info */
172 static void gfar_gdrvinfo(struct net_device *dev, struct
173 ethtool_drvinfo *drvinfo)
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;
185 /* Return the current settings in the ethtool_cmd structure */
186 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
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;
196 cmd->supported = (SUPPORTED_10baseT_Half
197 | SUPPORTED_100baseT_Half
198 | SUPPORTED_100baseT_Full
199 | gigabit_support | SUPPORTED_Autoneg);
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);
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;
219 /* Return the length of the register structure */
220 static int gfar_reglen(struct net_device *dev)
222 return sizeof (struct gfar);
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)
229 struct gfar_private *priv = netdev_priv(dev);
230 u32 *theregs = (u32 *) priv->regs;
231 u32 *buf = (u32 *) regbuf;
233 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
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)
243 /* The timer is different, depending on the interface speed */
244 switch (priv->mii_info->speed) {
246 count = GFAR_GBIT_TIME;
249 count = GFAR_100_TIME;
253 count = GFAR_10_TIME;
257 /* Make sure we return a number greater than 0
259 return ((usecs * 1000 + count - 1) / count);
262 /* Convert ethernet clock ticks to microseconds */
263 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
267 /* The timer is different, depending on the interface speed */
268 switch (priv->mii_info->speed) {
270 count = GFAR_GBIT_TIME;
273 count = GFAR_100_TIME;
277 count = GFAR_10_TIME;
281 /* Make sure we return a number greater than 0 */
282 /* if ticks is > 0 */
283 return ((ticks * count) / 1000);
286 /* Get the coalescing parameters, and put them in the cvals
288 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
290 struct gfar_private *priv = netdev_priv(dev);
292 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
295 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
296 cvals->rx_max_coalesced_frames = priv->rxcount;
298 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
299 cvals->tx_max_coalesced_frames = priv->txcount;
301 cvals->use_adaptive_rx_coalesce = 0;
302 cvals->use_adaptive_tx_coalesce = 0;
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;
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.
315 /* When the packet rate is (measured in packets per second)
316 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
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;
325 /* How often to do adaptive coalescing packet rate sampling,
326 * measured in seconds. Must not be zero.
328 cvals->rate_sample_interval = 0;
333 /* Change the coalescing values.
334 * Both cvals->*_usecs and cvals->*_frames have to be > 0
335 * in order for coalescing to be active
337 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
339 struct gfar_private *priv = netdev_priv(dev);
341 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
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 static 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 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
406 struct gfar_private *priv = netdev_priv(dev);
409 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
412 if (!is_power_of_2(rvals->rx_pending)) {
413 printk("%s: Ring sizes must be a power of 2\n",
418 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
421 if (!is_power_of_2(rvals->tx_pending)) {
422 printk("%s: Ring sizes must be a power of 2\n",
427 if (dev->flags & IFF_UP) {
430 /* Halt TX and RX, and process the frames which
431 * have already been received */
432 spin_lock_irqsave(&priv->lock, flags);
434 gfar_clean_rx_ring(dev, priv->rx_ring_size);
435 spin_unlock_irqrestore(&priv->lock, flags);
437 /* Now we take down the rings to rebuild them */
441 /* Change the size */
442 priv->rx_ring_size = rvals->rx_pending;
443 priv->tx_ring_size = rvals->tx_pending;
445 /* Rebuild the rings with the new size */
446 if (dev->flags & IFF_UP)
447 err = startup_gfar(dev);
452 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
454 struct gfar_private *priv = netdev_priv(dev);
457 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
460 if (dev->flags & IFF_UP) {
463 /* Halt TX and RX, and process the frames which
464 * have already been received */
465 spin_lock_irqsave(&priv->lock, flags);
467 gfar_clean_rx_ring(dev, priv->rx_ring_size);
468 spin_unlock_irqrestore(&priv->lock, flags);
470 /* Now we take down the rings to rebuild them */
474 priv->rx_csum_enable = data;
476 if (dev->flags & IFF_UP)
477 err = startup_gfar(dev);
482 static uint32_t gfar_get_rx_csum(struct net_device *dev)
484 struct gfar_private *priv = netdev_priv(dev);
486 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
489 return priv->rx_csum_enable;
492 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
495 struct gfar_private *priv = netdev_priv(dev);
497 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
500 spin_lock_irqsave(&priv->lock, flags);
504 dev->features |= NETIF_F_IP_CSUM;
506 dev->features &= ~NETIF_F_IP_CSUM;
509 spin_unlock_irqrestore(&priv->lock, flags);
514 static uint32_t gfar_get_tx_csum(struct net_device *dev)
516 struct gfar_private *priv = netdev_priv(dev);
518 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
521 return (dev->features & NETIF_F_IP_CSUM) != 0;
524 static uint32_t gfar_get_msglevel(struct net_device *dev)
526 struct gfar_private *priv = netdev_priv(dev);
527 return priv->msg_enable;
530 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
532 struct gfar_private *priv = netdev_priv(dev);
533 priv->msg_enable = data;
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,