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
->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
->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 static int gfar_sset_count(struct net_device
*dev
, int sset
)
157 struct gfar_private
*priv
= netdev_priv(dev
);
161 if (priv
->device_flags
& FSL_GIANFAR_DEV_HAS_RMON
)
162 return GFAR_STATS_LEN
;
164 return GFAR_EXTRA_STATS_LEN
;
170 /* Fills in the drvinfo structure with some basic info */
171 static 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
->regdump_len
= 0;
179 drvinfo
->eedump_len
= 0;
183 static int gfar_ssettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
185 struct gfar_private
*priv
= netdev_priv(dev
);
186 struct phy_device
*phydev
= priv
->phydev
;
191 return phy_ethtool_sset(phydev
, cmd
);
195 /* Return the current settings in the ethtool_cmd structure */
196 static int gfar_gsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
198 struct gfar_private
*priv
= netdev_priv(dev
);
199 struct phy_device
*phydev
= priv
->phydev
;
204 cmd
->maxtxpkt
= get_icft_value(priv
->txic
);
205 cmd
->maxrxpkt
= get_icft_value(priv
->rxic
);
207 return phy_ethtool_gset(phydev
, cmd
);
210 /* Return the length of the register structure */
211 static int gfar_reglen(struct net_device
*dev
)
213 return sizeof (struct gfar
);
216 /* Return a dump of the GFAR register space */
217 static void gfar_get_regs(struct net_device
*dev
, struct ethtool_regs
*regs
, void *regbuf
)
220 struct gfar_private
*priv
= netdev_priv(dev
);
221 u32 __iomem
*theregs
= (u32 __iomem
*) priv
->regs
;
222 u32
*buf
= (u32
*) regbuf
;
224 for (i
= 0; i
< sizeof (struct gfar
) / sizeof (u32
); i
++)
225 buf
[i
] = gfar_read(&theregs
[i
]);
228 /* Convert microseconds to ethernet clock ticks, which changes
229 * depending on what speed the controller is running at */
230 static unsigned int gfar_usecs2ticks(struct gfar_private
*priv
, unsigned int usecs
)
234 /* The timer is different, depending on the interface speed */
235 switch (priv
->phydev
->speed
) {
237 count
= GFAR_GBIT_TIME
;
240 count
= GFAR_100_TIME
;
244 count
= GFAR_10_TIME
;
248 /* Make sure we return a number greater than 0
250 return ((usecs
* 1000 + count
- 1) / count
);
253 /* Convert ethernet clock ticks to microseconds */
254 static unsigned int gfar_ticks2usecs(struct gfar_private
*priv
, unsigned int ticks
)
258 /* The timer is different, depending on the interface speed */
259 switch (priv
->phydev
->speed
) {
261 count
= GFAR_GBIT_TIME
;
264 count
= GFAR_100_TIME
;
268 count
= GFAR_10_TIME
;
272 /* Make sure we return a number greater than 0 */
273 /* if ticks is > 0 */
274 return ((ticks
* count
) / 1000);
277 /* Get the coalescing parameters, and put them in the cvals
279 static int gfar_gcoalesce(struct net_device
*dev
, struct ethtool_coalesce
*cvals
)
281 struct gfar_private
*priv
= netdev_priv(dev
);
282 unsigned long rxtime
;
283 unsigned long rxcount
;
284 unsigned long txtime
;
285 unsigned long txcount
;
287 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_COALESCE
))
290 if (NULL
== priv
->phydev
)
293 rxtime
= get_ictt_value(priv
->rxic
);
294 rxcount
= get_icft_value(priv
->rxic
);
295 txtime
= get_ictt_value(priv
->txic
);
296 txcount
= get_icft_value(priv
->txic
);
297 cvals
->rx_coalesce_usecs
= gfar_ticks2usecs(priv
, rxtime
);
298 cvals
->rx_max_coalesced_frames
= rxcount
;
300 cvals
->tx_coalesce_usecs
= gfar_ticks2usecs(priv
, txtime
);
301 cvals
->tx_max_coalesced_frames
= txcount
;
303 cvals
->use_adaptive_rx_coalesce
= 0;
304 cvals
->use_adaptive_tx_coalesce
= 0;
306 cvals
->pkt_rate_low
= 0;
307 cvals
->rx_coalesce_usecs_low
= 0;
308 cvals
->rx_max_coalesced_frames_low
= 0;
309 cvals
->tx_coalesce_usecs_low
= 0;
310 cvals
->tx_max_coalesced_frames_low
= 0;
312 /* When the packet rate is below pkt_rate_high but above
313 * pkt_rate_low (both measured in packets per second) the
314 * normal {rx,tx}_* coalescing parameters are used.
317 /* When the packet rate is (measured in packets per second)
318 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
321 cvals
->pkt_rate_high
= 0;
322 cvals
->rx_coalesce_usecs_high
= 0;
323 cvals
->rx_max_coalesced_frames_high
= 0;
324 cvals
->tx_coalesce_usecs_high
= 0;
325 cvals
->tx_max_coalesced_frames_high
= 0;
327 /* How often to do adaptive coalescing packet rate sampling,
328 * measured in seconds. Must not be zero.
330 cvals
->rate_sample_interval
= 0;
335 /* Change the coalescing values.
336 * Both cvals->*_usecs and cvals->*_frames have to be > 0
337 * in order for coalescing to be active
339 static int gfar_scoalesce(struct net_device
*dev
, struct ethtool_coalesce
*cvals
)
341 struct gfar_private
*priv
= netdev_priv(dev
);
343 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_COALESCE
))
346 /* Set up rx coalescing */
347 if ((cvals
->rx_coalesce_usecs
== 0) ||
348 (cvals
->rx_max_coalesced_frames
== 0))
349 priv
->rxcoalescing
= 0;
351 priv
->rxcoalescing
= 1;
353 if (NULL
== priv
->phydev
)
356 /* Check the bounds of the values */
357 if (cvals
->rx_coalesce_usecs
> GFAR_MAX_COAL_USECS
) {
358 pr_info("Coalescing is limited to %d microseconds\n",
359 GFAR_MAX_COAL_USECS
);
363 if (cvals
->rx_max_coalesced_frames
> GFAR_MAX_COAL_FRAMES
) {
364 pr_info("Coalescing is limited to %d frames\n",
365 GFAR_MAX_COAL_FRAMES
);
369 priv
->rxic
= mk_ic_value(cvals
->rx_max_coalesced_frames
,
370 gfar_usecs2ticks(priv
, cvals
->rx_coalesce_usecs
));
372 /* Set up tx coalescing */
373 if ((cvals
->tx_coalesce_usecs
== 0) ||
374 (cvals
->tx_max_coalesced_frames
== 0))
375 priv
->txcoalescing
= 0;
377 priv
->txcoalescing
= 1;
379 /* Check the bounds of the values */
380 if (cvals
->tx_coalesce_usecs
> GFAR_MAX_COAL_USECS
) {
381 pr_info("Coalescing is limited to %d microseconds\n",
382 GFAR_MAX_COAL_USECS
);
386 if (cvals
->tx_max_coalesced_frames
> GFAR_MAX_COAL_FRAMES
) {
387 pr_info("Coalescing is limited to %d frames\n",
388 GFAR_MAX_COAL_FRAMES
);
392 priv
->txic
= mk_ic_value(cvals
->tx_max_coalesced_frames
,
393 gfar_usecs2ticks(priv
, cvals
->tx_coalesce_usecs
));
395 gfar_write(&priv
->regs
->rxic
, 0);
396 if (priv
->rxcoalescing
)
397 gfar_write(&priv
->regs
->rxic
, priv
->rxic
);
399 gfar_write(&priv
->regs
->txic
, 0);
400 if (priv
->txcoalescing
)
401 gfar_write(&priv
->regs
->txic
, priv
->txic
);
406 /* Fills in rvals with the current ring parameters. Currently,
407 * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
408 * jumbo are ignored by the driver */
409 static void gfar_gringparam(struct net_device
*dev
, struct ethtool_ringparam
*rvals
)
411 struct gfar_private
*priv
= netdev_priv(dev
);
413 rvals
->rx_max_pending
= GFAR_RX_MAX_RING_SIZE
;
414 rvals
->rx_mini_max_pending
= GFAR_RX_MAX_RING_SIZE
;
415 rvals
->rx_jumbo_max_pending
= GFAR_RX_MAX_RING_SIZE
;
416 rvals
->tx_max_pending
= GFAR_TX_MAX_RING_SIZE
;
418 /* Values changeable by the user. The valid values are
419 * in the range 1 to the "*_max_pending" counterpart above.
421 rvals
->rx_pending
= priv
->rx_ring_size
;
422 rvals
->rx_mini_pending
= priv
->rx_ring_size
;
423 rvals
->rx_jumbo_pending
= priv
->rx_ring_size
;
424 rvals
->tx_pending
= priv
->tx_ring_size
;
427 /* Change the current ring parameters, stopping the controller if
428 * necessary so that we don't mess things up while we're in
429 * motion. We wait for the ring to be clean before reallocating
431 static int gfar_sringparam(struct net_device
*dev
, struct ethtool_ringparam
*rvals
)
433 struct gfar_private
*priv
= netdev_priv(dev
);
436 if (rvals
->rx_pending
> GFAR_RX_MAX_RING_SIZE
)
439 if (!is_power_of_2(rvals
->rx_pending
)) {
440 printk("%s: Ring sizes must be a power of 2\n",
445 if (rvals
->tx_pending
> GFAR_TX_MAX_RING_SIZE
)
448 if (!is_power_of_2(rvals
->tx_pending
)) {
449 printk("%s: Ring sizes must be a power of 2\n",
454 if (dev
->flags
& IFF_UP
) {
457 /* Halt TX and RX, and process the frames which
458 * have already been received */
459 spin_lock_irqsave(&priv
->txlock
, flags
);
460 spin_lock(&priv
->rxlock
);
464 spin_unlock(&priv
->rxlock
);
465 spin_unlock_irqrestore(&priv
->txlock
, flags
);
467 gfar_clean_rx_ring(dev
, priv
->rx_ring_size
);
469 /* Now we take down the rings to rebuild them */
473 /* Change the size */
474 priv
->rx_ring_size
= rvals
->rx_pending
;
475 priv
->tx_ring_size
= rvals
->tx_pending
;
476 priv
->num_txbdfree
= priv
->tx_ring_size
;
478 /* Rebuild the rings with the new size */
479 if (dev
->flags
& IFF_UP
) {
480 err
= startup_gfar(dev
);
481 netif_wake_queue(dev
);
486 static int gfar_set_rx_csum(struct net_device
*dev
, uint32_t data
)
488 struct gfar_private
*priv
= netdev_priv(dev
);
492 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_CSUM
))
495 if (dev
->flags
& IFF_UP
) {
496 /* Halt TX and RX, and process the frames which
497 * have already been received */
498 spin_lock_irqsave(&priv
->txlock
, flags
);
499 spin_lock(&priv
->rxlock
);
503 spin_unlock(&priv
->rxlock
);
504 spin_unlock_irqrestore(&priv
->txlock
, flags
);
506 gfar_clean_rx_ring(dev
, priv
->rx_ring_size
);
508 /* Now we take down the rings to rebuild them */
512 spin_lock_irqsave(&priv
->bflock
, flags
);
513 priv
->rx_csum_enable
= data
;
514 spin_unlock_irqrestore(&priv
->bflock
, flags
);
516 if (dev
->flags
& IFF_UP
) {
517 err
= startup_gfar(dev
);
518 netif_wake_queue(dev
);
523 static uint32_t gfar_get_rx_csum(struct net_device
*dev
)
525 struct gfar_private
*priv
= netdev_priv(dev
);
527 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_CSUM
))
530 return priv
->rx_csum_enable
;
533 static int gfar_set_tx_csum(struct net_device
*dev
, uint32_t data
)
535 struct gfar_private
*priv
= netdev_priv(dev
);
537 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_CSUM
))
540 netif_tx_lock_bh(dev
);
543 dev
->features
|= NETIF_F_IP_CSUM
;
545 dev
->features
&= ~NETIF_F_IP_CSUM
;
547 netif_tx_unlock_bh(dev
);
552 static uint32_t gfar_get_tx_csum(struct net_device
*dev
)
554 struct gfar_private
*priv
= netdev_priv(dev
);
556 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_CSUM
))
559 return (dev
->features
& NETIF_F_IP_CSUM
) != 0;
562 static uint32_t gfar_get_msglevel(struct net_device
*dev
)
564 struct gfar_private
*priv
= netdev_priv(dev
);
565 return priv
->msg_enable
;
568 static void gfar_set_msglevel(struct net_device
*dev
, uint32_t data
)
570 struct gfar_private
*priv
= netdev_priv(dev
);
571 priv
->msg_enable
= data
;
575 static void gfar_get_wol(struct net_device
*dev
, struct ethtool_wolinfo
*wol
)
577 struct gfar_private
*priv
= netdev_priv(dev
);
579 if (priv
->device_flags
& FSL_GIANFAR_DEV_HAS_MAGIC_PACKET
) {
580 wol
->supported
= WAKE_MAGIC
;
581 wol
->wolopts
= priv
->wol_en
? WAKE_MAGIC
: 0;
583 wol
->supported
= wol
->wolopts
= 0;
587 static int gfar_set_wol(struct net_device
*dev
, struct ethtool_wolinfo
*wol
)
589 struct gfar_private
*priv
= netdev_priv(dev
);
592 if (!(priv
->device_flags
& FSL_GIANFAR_DEV_HAS_MAGIC_PACKET
) &&
596 if (wol
->wolopts
& ~WAKE_MAGIC
)
599 spin_lock_irqsave(&priv
->bflock
, flags
);
600 priv
->wol_en
= wol
->wolopts
& WAKE_MAGIC
? 1 : 0;
601 device_set_wakeup_enable(&dev
->dev
, priv
->wol_en
);
602 spin_unlock_irqrestore(&priv
->bflock
, flags
);
608 const struct ethtool_ops gfar_ethtool_ops
= {
609 .get_settings
= gfar_gsettings
,
610 .set_settings
= gfar_ssettings
,
611 .get_drvinfo
= gfar_gdrvinfo
,
612 .get_regs_len
= gfar_reglen
,
613 .get_regs
= gfar_get_regs
,
614 .get_link
= ethtool_op_get_link
,
615 .get_coalesce
= gfar_gcoalesce
,
616 .set_coalesce
= gfar_scoalesce
,
617 .get_ringparam
= gfar_gringparam
,
618 .set_ringparam
= gfar_sringparam
,
619 .get_strings
= gfar_gstrings
,
620 .get_sset_count
= gfar_sset_count
,
621 .get_ethtool_stats
= gfar_fill_stats
,
622 .get_rx_csum
= gfar_get_rx_csum
,
623 .get_tx_csum
= gfar_get_tx_csum
,
624 .set_rx_csum
= gfar_set_rx_csum
,
625 .set_tx_csum
= gfar_set_tx_csum
,
626 .set_sg
= ethtool_op_set_sg
,
627 .get_msglevel
= gfar_get_msglevel
,
628 .set_msglevel
= gfar_set_msglevel
,
630 .get_wol
= gfar_get_wol
,
631 .set_wol
= gfar_set_wol
,