Root/drivers/net/gianfar_ethtool.c

1/*
2 * drivers/net/gianfar_ethtool.c
3 *
4 * Gianfar Ethernet Driver
5 * Ethtool support for Gianfar Enet
6 * Based on e1000 ethtool support
7 *
8 * Author: Andy Fleming
9 * Maintainer: Kumar Gala
10 *
11 * Copyright (c) 2003,2004 Freescale Semiconductor, Inc.
12 *
13 * This software may be used and distributed according to
14 * the terms of the GNU Public License, Version 2, incorporated herein
15 * by reference.
16 */
17
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>
29#include <linux/mm.h>
30
31#include <asm/io.h>
32#include <asm/irq.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>
40
41#include "gianfar.h"
42
43extern void gfar_start(struct net_device *dev);
44extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
45
46#define GFAR_MAX_COAL_USECS 0xffff
47#define GFAR_MAX_COAL_FRAMES 0xff
48static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
49             u64 * buf);
50static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
51static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
52static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
53static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
54static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
55static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
56
57static 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",
62    "rx-crc-errors",
63    "rx-overrun-errors",
64    "rx-busy-errors",
65    "rx-babbling-errors",
66    "rx-truncated-frames",
67    "ethernet-bus-error",
68    "tx-babbling-errors",
69    "tx-underrun-errors",
70    "rx-skb-missing-errors",
71    "tx-timeout-errors",
72    "tx-rx-64-frames",
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",
79    "rx-bytes",
80    "rx-packets",
81    "rx-fcs-errors",
82    "receive-multicast-packet",
83    "receive-broadcast-packet",
84    "rx-control-frame-packets",
85    "rx-pause-frame-packets",
86    "rx-unknown-op-code",
87    "rx-alignment-error",
88    "rx-frame-length-error",
89    "rx-code-error",
90    "rx-carrier-sense-error",
91    "rx-undersize-packets",
92    "rx-oversize-packets",
93    "rx-fragmented-frames",
94    "rx-jabber-frames",
95    "rx-dropped-frames",
96    "tx-byte-counter",
97    "tx-packets",
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",
108    "reserved",
109    "tx-dropped-frames",
110    "tx-jabber-frames",
111    "tx-fcs-errors",
112    "tx-control-frames",
113    "tx-oversize-frames",
114    "tx-undersize-frames",
115    "tx-fragmented-frames",
116};
117
118/* Fill in a buffer with the strings which correspond to the
119 * stats */
120static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
121{
122    struct gfar_private *priv = netdev_priv(dev);
123
124    if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
125        memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
126    else
127        memcpy(buf, stat_gstrings,
128                GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
129}
130
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
134 */
135static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
136{
137    int i;
138    struct gfar_private *priv = netdev_priv(dev);
139    u64 *extra = (u64 *) & priv->extra_stats;
140
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;
144
145        for (i = 0; i < GFAR_RMON_LEN; i++)
146            stats->rmon[i] = (u64) gfar_read(&rmon[i]);
147
148        for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
149            stats->extra[i] = extra[i];
150    } else
151        for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
152            buf[i] = extra[i];
153}
154
155static int gfar_sset_count(struct net_device *dev, int sset)
156{
157    struct gfar_private *priv = netdev_priv(dev);
158
159    switch (sset) {
160    case ETH_SS_STATS:
161        if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
162            return GFAR_STATS_LEN;
163        else
164            return GFAR_EXTRA_STATS_LEN;
165    default:
166        return -EOPNOTSUPP;
167    }
168}
169
170/* Fills in the drvinfo structure with some basic info */
171static void gfar_gdrvinfo(struct net_device *dev, struct
172          ethtool_drvinfo *drvinfo)
173{
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;
180}
181
182
183static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
184{
185    struct gfar_private *priv = netdev_priv(dev);
186    struct phy_device *phydev = priv->phydev;
187
188    if (NULL == phydev)
189        return -ENODEV;
190
191    return phy_ethtool_sset(phydev, cmd);
192}
193
194
195/* Return the current settings in the ethtool_cmd structure */
196static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
197{
198    struct gfar_private *priv = netdev_priv(dev);
199    struct phy_device *phydev = priv->phydev;
200
201    if (NULL == phydev)
202        return -ENODEV;
203
204    cmd->maxtxpkt = get_icft_value(priv->txic);
205    cmd->maxrxpkt = get_icft_value(priv->rxic);
206
207    return phy_ethtool_gset(phydev, cmd);
208}
209
210/* Return the length of the register structure */
211static int gfar_reglen(struct net_device *dev)
212{
213    return sizeof (struct gfar);
214}
215
216/* Return a dump of the GFAR register space */
217static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
218{
219    int i;
220    struct gfar_private *priv = netdev_priv(dev);
221    u32 __iomem *theregs = (u32 __iomem *) priv->regs;
222    u32 *buf = (u32 *) regbuf;
223
224    for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
225        buf[i] = gfar_read(&theregs[i]);
226}
227
228/* Convert microseconds to ethernet clock ticks, which changes
229 * depending on what speed the controller is running at */
230static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
231{
232    unsigned int count;
233
234    /* The timer is different, depending on the interface speed */
235    switch (priv->phydev->speed) {
236    case SPEED_1000:
237        count = GFAR_GBIT_TIME;
238        break;
239    case SPEED_100:
240        count = GFAR_100_TIME;
241        break;
242    case SPEED_10:
243    default:
244        count = GFAR_10_TIME;
245        break;
246    }
247
248    /* Make sure we return a number greater than 0
249     * if usecs > 0 */
250    return ((usecs * 1000 + count - 1) / count);
251}
252
253/* Convert ethernet clock ticks to microseconds */
254static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
255{
256    unsigned int count;
257
258    /* The timer is different, depending on the interface speed */
259    switch (priv->phydev->speed) {
260    case SPEED_1000:
261        count = GFAR_GBIT_TIME;
262        break;
263    case SPEED_100:
264        count = GFAR_100_TIME;
265        break;
266    case SPEED_10:
267    default:
268        count = GFAR_10_TIME;
269        break;
270    }
271
272    /* Make sure we return a number greater than 0 */
273    /* if ticks is > 0 */
274    return ((ticks * count) / 1000);
275}
276
277/* Get the coalescing parameters, and put them in the cvals
278 * structure. */
279static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
280{
281    struct gfar_private *priv = netdev_priv(dev);
282    unsigned long rxtime;
283    unsigned long rxcount;
284    unsigned long txtime;
285    unsigned long txcount;
286
287    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
288        return -EOPNOTSUPP;
289
290    if (NULL == priv->phydev)
291        return -ENODEV;
292
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;
299
300    cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime);
301    cvals->tx_max_coalesced_frames = txcount;
302
303    cvals->use_adaptive_rx_coalesce = 0;
304    cvals->use_adaptive_tx_coalesce = 0;
305
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;
311
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.
315     */
316
317    /* When the packet rate is (measured in packets per second)
318     * is above pkt_rate_high, the {rx,tx}_*_high parameters are
319     * used.
320     */
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;
326
327    /* How often to do adaptive coalescing packet rate sampling,
328     * measured in seconds. Must not be zero.
329     */
330    cvals->rate_sample_interval = 0;
331
332    return 0;
333}
334
335/* Change the coalescing values.
336 * Both cvals->*_usecs and cvals->*_frames have to be > 0
337 * in order for coalescing to be active
338 */
339static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
340{
341    struct gfar_private *priv = netdev_priv(dev);
342
343    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
344        return -EOPNOTSUPP;
345
346    /* Set up rx coalescing */
347    if ((cvals->rx_coalesce_usecs == 0) ||
348        (cvals->rx_max_coalesced_frames == 0))
349        priv->rxcoalescing = 0;
350    else
351        priv->rxcoalescing = 1;
352
353    if (NULL == priv->phydev)
354        return -ENODEV;
355
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);
360        return -EINVAL;
361    }
362
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);
366        return -EINVAL;
367    }
368
369    priv->rxic = mk_ic_value(cvals->rx_max_coalesced_frames,
370        gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
371
372    /* Set up tx coalescing */
373    if ((cvals->tx_coalesce_usecs == 0) ||
374        (cvals->tx_max_coalesced_frames == 0))
375        priv->txcoalescing = 0;
376    else
377        priv->txcoalescing = 1;
378
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);
383        return -EINVAL;
384    }
385
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);
389        return -EINVAL;
390    }
391
392    priv->txic = mk_ic_value(cvals->tx_max_coalesced_frames,
393        gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
394
395    gfar_write(&priv->regs->rxic, 0);
396    if (priv->rxcoalescing)
397        gfar_write(&priv->regs->rxic, priv->rxic);
398
399    gfar_write(&priv->regs->txic, 0);
400    if (priv->txcoalescing)
401        gfar_write(&priv->regs->txic, priv->txic);
402
403    return 0;
404}
405
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 */
409static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
410{
411    struct gfar_private *priv = netdev_priv(dev);
412
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;
417
418    /* Values changeable by the user. The valid values are
419     * in the range 1 to the "*_max_pending" counterpart above.
420     */
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;
425}
426
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
430 * the rings. */
431static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
432{
433    struct gfar_private *priv = netdev_priv(dev);
434    int err = 0;
435
436    if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
437        return -EINVAL;
438
439    if (!is_power_of_2(rvals->rx_pending)) {
440        printk("%s: Ring sizes must be a power of 2\n",
441                dev->name);
442        return -EINVAL;
443    }
444
445    if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
446        return -EINVAL;
447
448    if (!is_power_of_2(rvals->tx_pending)) {
449        printk("%s: Ring sizes must be a power of 2\n",
450                dev->name);
451        return -EINVAL;
452    }
453
454    if (dev->flags & IFF_UP) {
455        unsigned long flags;
456
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);
461
462        gfar_halt(dev);
463
464        spin_unlock(&priv->rxlock);
465        spin_unlock_irqrestore(&priv->txlock, flags);
466
467        gfar_clean_rx_ring(dev, priv->rx_ring_size);
468
469        /* Now we take down the rings to rebuild them */
470        stop_gfar(dev);
471    }
472
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;
477
478    /* Rebuild the rings with the new size */
479    if (dev->flags & IFF_UP) {
480        err = startup_gfar(dev);
481        netif_wake_queue(dev);
482    }
483    return err;
484}
485
486static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
487{
488    struct gfar_private *priv = netdev_priv(dev);
489    unsigned long flags;
490    int err = 0;
491
492    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
493        return -EOPNOTSUPP;
494
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);
500
501        gfar_halt(dev);
502
503        spin_unlock(&priv->rxlock);
504        spin_unlock_irqrestore(&priv->txlock, flags);
505
506        gfar_clean_rx_ring(dev, priv->rx_ring_size);
507
508        /* Now we take down the rings to rebuild them */
509        stop_gfar(dev);
510    }
511
512    spin_lock_irqsave(&priv->bflock, flags);
513    priv->rx_csum_enable = data;
514    spin_unlock_irqrestore(&priv->bflock, flags);
515
516    if (dev->flags & IFF_UP) {
517        err = startup_gfar(dev);
518        netif_wake_queue(dev);
519    }
520    return err;
521}
522
523static uint32_t gfar_get_rx_csum(struct net_device *dev)
524{
525    struct gfar_private *priv = netdev_priv(dev);
526
527    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
528        return 0;
529
530    return priv->rx_csum_enable;
531}
532
533static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
534{
535    struct gfar_private *priv = netdev_priv(dev);
536
537    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
538        return -EOPNOTSUPP;
539
540    netif_tx_lock_bh(dev);
541
542    if (data)
543        dev->features |= NETIF_F_IP_CSUM;
544    else
545        dev->features &= ~NETIF_F_IP_CSUM;
546
547    netif_tx_unlock_bh(dev);
548
549    return 0;
550}
551
552static uint32_t gfar_get_tx_csum(struct net_device *dev)
553{
554    struct gfar_private *priv = netdev_priv(dev);
555
556    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
557        return 0;
558
559    return (dev->features & NETIF_F_IP_CSUM) != 0;
560}
561
562static uint32_t gfar_get_msglevel(struct net_device *dev)
563{
564    struct gfar_private *priv = netdev_priv(dev);
565    return priv->msg_enable;
566}
567
568static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
569{
570    struct gfar_private *priv = netdev_priv(dev);
571    priv->msg_enable = data;
572}
573
574#ifdef CONFIG_PM
575static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
576{
577    struct gfar_private *priv = netdev_priv(dev);
578
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;
582    } else {
583        wol->supported = wol->wolopts = 0;
584    }
585}
586
587static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
588{
589    struct gfar_private *priv = netdev_priv(dev);
590    unsigned long flags;
591
592    if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
593        wol->wolopts != 0)
594        return -EINVAL;
595
596    if (wol->wolopts & ~WAKE_MAGIC)
597        return -EINVAL;
598
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);
603
604    return 0;
605}
606#endif
607
608const 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,
629#ifdef CONFIG_PM
630    .get_wol = gfar_get_wol,
631    .set_wol = gfar_set_wol,
632#endif
633};
634

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.2
jz-3.3
jz-3.4
jz47xx
jz47xx-2.6.38
master
xiangfu/openwrt/v3.0.0
xiangfu/openwrt/v3.2.1

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7



interactive