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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / stmicro / stmmac / stmmac_ethtool.c
blobf98e1511660fe7c2136d345d7efa0bb12e05dec2
1 /*******************************************************************************
2 STMMAC Ethtool support
3
4 Copyright (C) 2007-2009 STMicroelectronics Ltd
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
23 *******************************************************************************/
24
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/interrupt.h>
28 #include <linux/mii.h>
29 #include <linux/phy.h>
30 #include <asm/io.h>
31
32 #include "stmmac.h"
33 #include "dwmac_dma.h"
34
35 #define REG_SPACE_SIZE 0x1054
36 #define MAC100_ETHTOOL_NAME "st_mac100"
37 #define GMAC_ETHTOOL_NAME "st_gmac"
38
39 struct stmmac_stats {
40 char stat_string[ETH_GSTRING_LEN];
41 int sizeof_stat;
42 int stat_offset;
43 };
44
45 #define STMMAC_STAT(m) \
46 { #m, FIELD_SIZEOF(struct stmmac_extra_stats, m), \
47 offsetof(struct stmmac_priv, xstats.m)}
48
49 static const struct stmmac_stats stmmac_gstrings_stats[] = {
50 /* Transmit errors */
51 STMMAC_STAT(tx_underflow),
52 STMMAC_STAT(tx_carrier),
53 STMMAC_STAT(tx_losscarrier),
54 STMMAC_STAT(vlan_tag),
55 STMMAC_STAT(tx_deferred),
56 STMMAC_STAT(tx_vlan),
57 STMMAC_STAT(tx_jabber),
58 STMMAC_STAT(tx_frame_flushed),
59 STMMAC_STAT(tx_payload_error),
60 STMMAC_STAT(tx_ip_header_error),
61 /* Receive errors */
62 STMMAC_STAT(rx_desc),
63 STMMAC_STAT(sa_filter_fail),
64 STMMAC_STAT(overflow_error),
65 STMMAC_STAT(ipc_csum_error),
66 STMMAC_STAT(rx_collision),
67 STMMAC_STAT(rx_crc),
68 STMMAC_STAT(dribbling_bit),
69 STMMAC_STAT(rx_length),
70 STMMAC_STAT(rx_mii),
71 STMMAC_STAT(rx_multicast),
72 STMMAC_STAT(rx_gmac_overflow),
73 STMMAC_STAT(rx_watchdog),
74 STMMAC_STAT(da_rx_filter_fail),
75 STMMAC_STAT(sa_rx_filter_fail),
76 STMMAC_STAT(rx_missed_cntr),
77 STMMAC_STAT(rx_overflow_cntr),
78 STMMAC_STAT(rx_vlan),
79 /* Tx/Rx IRQ errors */
80 STMMAC_STAT(tx_undeflow_irq),
81 STMMAC_STAT(tx_process_stopped_irq),
82 STMMAC_STAT(tx_jabber_irq),
83 STMMAC_STAT(rx_overflow_irq),
84 STMMAC_STAT(rx_buf_unav_irq),
85 STMMAC_STAT(rx_process_stopped_irq),
86 STMMAC_STAT(rx_watchdog_irq),
87 STMMAC_STAT(tx_early_irq),
88 STMMAC_STAT(fatal_bus_error_irq),
89 /* Extra info */
90 STMMAC_STAT(threshold),
91 STMMAC_STAT(tx_pkt_n),
92 STMMAC_STAT(rx_pkt_n),
93 STMMAC_STAT(poll_n),
94 STMMAC_STAT(sched_timer_n),
95 STMMAC_STAT(normal_irq_n),
96 };
97 #define STMMAC_STATS_LEN ARRAY_SIZE(stmmac_gstrings_stats)
98
99 /* HW MAC Management counters (if supported) */
100 #define STMMAC_MMC_STAT(m) \
101 { #m, FIELD_SIZEOF(struct stmmac_counters, m), \
102 offsetof(struct stmmac_priv, mmc.m)}
103
104 static const struct stmmac_stats stmmac_mmc[] = {
105 STMMAC_MMC_STAT(mmc_tx_octetcount_gb),
106 STMMAC_MMC_STAT(mmc_tx_framecount_gb),
107 STMMAC_MMC_STAT(mmc_tx_broadcastframe_g),
108 STMMAC_MMC_STAT(mmc_tx_multicastframe_g),
109 STMMAC_MMC_STAT(mmc_tx_64_octets_gb),
110 STMMAC_MMC_STAT(mmc_tx_65_to_127_octets_gb),
111 STMMAC_MMC_STAT(mmc_tx_128_to_255_octets_gb),
112 STMMAC_MMC_STAT(mmc_tx_256_to_511_octets_gb),
113 STMMAC_MMC_STAT(mmc_tx_512_to_1023_octets_gb),
114 STMMAC_MMC_STAT(mmc_tx_1024_to_max_octets_gb),
115 STMMAC_MMC_STAT(mmc_tx_unicast_gb),
116 STMMAC_MMC_STAT(mmc_tx_multicast_gb),
117 STMMAC_MMC_STAT(mmc_tx_broadcast_gb),
118 STMMAC_MMC_STAT(mmc_tx_underflow_error),
119 STMMAC_MMC_STAT(mmc_tx_singlecol_g),
120 STMMAC_MMC_STAT(mmc_tx_multicol_g),
121 STMMAC_MMC_STAT(mmc_tx_deferred),
122 STMMAC_MMC_STAT(mmc_tx_latecol),
123 STMMAC_MMC_STAT(mmc_tx_exesscol),
124 STMMAC_MMC_STAT(mmc_tx_carrier_error),
125 STMMAC_MMC_STAT(mmc_tx_octetcount_g),
126 STMMAC_MMC_STAT(mmc_tx_framecount_g),
127 STMMAC_MMC_STAT(mmc_tx_excessdef),
128 STMMAC_MMC_STAT(mmc_tx_pause_frame),
129 STMMAC_MMC_STAT(mmc_tx_vlan_frame_g),
130 STMMAC_MMC_STAT(mmc_rx_framecount_gb),
131 STMMAC_MMC_STAT(mmc_rx_octetcount_gb),
132 STMMAC_MMC_STAT(mmc_rx_octetcount_g),
133 STMMAC_MMC_STAT(mmc_rx_broadcastframe_g),
134 STMMAC_MMC_STAT(mmc_rx_multicastframe_g),
135 STMMAC_MMC_STAT(mmc_rx_crc_errror),
136 STMMAC_MMC_STAT(mmc_rx_align_error),
137 STMMAC_MMC_STAT(mmc_rx_run_error),
138 STMMAC_MMC_STAT(mmc_rx_jabber_error),
139 STMMAC_MMC_STAT(mmc_rx_undersize_g),
140 STMMAC_MMC_STAT(mmc_rx_oversize_g),
141 STMMAC_MMC_STAT(mmc_rx_64_octets_gb),
142 STMMAC_MMC_STAT(mmc_rx_65_to_127_octets_gb),
143 STMMAC_MMC_STAT(mmc_rx_128_to_255_octets_gb),
144 STMMAC_MMC_STAT(mmc_rx_256_to_511_octets_gb),
145 STMMAC_MMC_STAT(mmc_rx_512_to_1023_octets_gb),
146 STMMAC_MMC_STAT(mmc_rx_1024_to_max_octets_gb),
147 STMMAC_MMC_STAT(mmc_rx_unicast_g),
148 STMMAC_MMC_STAT(mmc_rx_length_error),
149 STMMAC_MMC_STAT(mmc_rx_autofrangetype),
150 STMMAC_MMC_STAT(mmc_rx_pause_frames),
151 STMMAC_MMC_STAT(mmc_rx_fifo_overflow),
152 STMMAC_MMC_STAT(mmc_rx_vlan_frames_gb),
153 STMMAC_MMC_STAT(mmc_rx_watchdog_error),
154 STMMAC_MMC_STAT(mmc_rx_ipc_intr_mask),
155 STMMAC_MMC_STAT(mmc_rx_ipc_intr),
156 STMMAC_MMC_STAT(mmc_rx_ipv4_gd),
157 STMMAC_MMC_STAT(mmc_rx_ipv4_hderr),
158 STMMAC_MMC_STAT(mmc_rx_ipv4_nopay),
159 STMMAC_MMC_STAT(mmc_rx_ipv4_frag),
160 STMMAC_MMC_STAT(mmc_rx_ipv4_udsbl),
161 STMMAC_MMC_STAT(mmc_rx_ipv4_gd_octets),
162 STMMAC_MMC_STAT(mmc_rx_ipv4_hderr_octets),
163 STMMAC_MMC_STAT(mmc_rx_ipv4_nopay_octets),
164 STMMAC_MMC_STAT(mmc_rx_ipv4_frag_octets),
165 STMMAC_MMC_STAT(mmc_rx_ipv4_udsbl_octets),
166 STMMAC_MMC_STAT(mmc_rx_ipv6_gd_octets),
167 STMMAC_MMC_STAT(mmc_rx_ipv6_hderr_octets),
168 STMMAC_MMC_STAT(mmc_rx_ipv6_nopay_octets),
169 STMMAC_MMC_STAT(mmc_rx_ipv6_gd),
170 STMMAC_MMC_STAT(mmc_rx_ipv6_hderr),
171 STMMAC_MMC_STAT(mmc_rx_ipv6_nopay),
172 STMMAC_MMC_STAT(mmc_rx_udp_gd),
173 STMMAC_MMC_STAT(mmc_rx_udp_err),
174 STMMAC_MMC_STAT(mmc_rx_tcp_gd),
175 STMMAC_MMC_STAT(mmc_rx_tcp_err),
176 STMMAC_MMC_STAT(mmc_rx_icmp_gd),
177 STMMAC_MMC_STAT(mmc_rx_icmp_err),
178 STMMAC_MMC_STAT(mmc_rx_udp_gd_octets),
179 STMMAC_MMC_STAT(mmc_rx_udp_err_octets),
180 STMMAC_MMC_STAT(mmc_rx_tcp_gd_octets),
181 STMMAC_MMC_STAT(mmc_rx_tcp_err_octets),
182 STMMAC_MMC_STAT(mmc_rx_icmp_gd_octets),
183 STMMAC_MMC_STAT(mmc_rx_icmp_err_octets),
184 };
185 #define STMMAC_MMC_STATS_LEN ARRAY_SIZE(stmmac_mmc)
186
187 static void stmmac_ethtool_getdrvinfo(struct net_device *dev,
188 struct ethtool_drvinfo *info)
189 {
190 struct stmmac_priv *priv = netdev_priv(dev);
191
192 if (priv->plat->has_gmac)
193 strlcpy(info->driver, GMAC_ETHTOOL_NAME, sizeof(info->driver));
194 else
195 strlcpy(info->driver, MAC100_ETHTOOL_NAME,
196 sizeof(info->driver));
197
198 strcpy(info->version, DRV_MODULE_VERSION);
199 info->fw_version[0] = '\0';
200 }
201
202 static int stmmac_ethtool_getsettings(struct net_device *dev,
203 struct ethtool_cmd *cmd)
204 {
205 struct stmmac_priv *priv = netdev_priv(dev);
206 struct phy_device *phy = priv->phydev;
207 int rc;
208 if (phy == NULL) {
209 pr_err("%s: %s: PHY is not registered\n",
210 __func__, dev->name);
211 return -ENODEV;
212 }
213 if (!netif_running(dev)) {
214 pr_err("%s: interface is disabled: we cannot track "
215 "link speed / duplex setting\n", dev->name);
216 return -EBUSY;
217 }
218 cmd->transceiver = XCVR_INTERNAL;
219 spin_lock_irq(&priv->lock);
220 rc = phy_ethtool_gset(phy, cmd);
221 spin_unlock_irq(&priv->lock);
222 return rc;
223 }
224
225 static int stmmac_ethtool_setsettings(struct net_device *dev,
226 struct ethtool_cmd *cmd)
227 {
228 struct stmmac_priv *priv = netdev_priv(dev);
229 struct phy_device *phy = priv->phydev;
230 int rc;
231
232 spin_lock(&priv->lock);
233 rc = phy_ethtool_sset(phy, cmd);
234 spin_unlock(&priv->lock);
235
236 return rc;
237 }
238
239 static u32 stmmac_ethtool_getmsglevel(struct net_device *dev)
240 {
241 struct stmmac_priv *priv = netdev_priv(dev);
242 return priv->msg_enable;
243 }
244
245 static void stmmac_ethtool_setmsglevel(struct net_device *dev, u32 level)
246 {
247 struct stmmac_priv *priv = netdev_priv(dev);
248 priv->msg_enable = level;
249
250 }
251
252 static int stmmac_check_if_running(struct net_device *dev)
253 {
254 if (!netif_running(dev))
255 return -EBUSY;
256 return 0;
257 }
258
259 static int stmmac_ethtool_get_regs_len(struct net_device *dev)
260 {
261 return REG_SPACE_SIZE;
262 }
263
264 static void stmmac_ethtool_gregs(struct net_device *dev,
265 struct ethtool_regs *regs, void *space)
266 {
267 int i;
268 u32 *reg_space = (u32 *) space;
269
270 struct stmmac_priv *priv = netdev_priv(dev);
271
272 memset(reg_space, 0x0, REG_SPACE_SIZE);
273
274 if (!priv->plat->has_gmac) {
275 /* MAC registers */
276 for (i = 0; i < 12; i++)
277 reg_space[i] = readl(priv->ioaddr + (i * 4));
278 /* DMA registers */
279 for (i = 0; i < 9; i++)
280 reg_space[i + 12] =
281 readl(priv->ioaddr + (DMA_BUS_MODE + (i * 4)));
282 reg_space[22] = readl(priv->ioaddr + DMA_CUR_TX_BUF_ADDR);
283 reg_space[23] = readl(priv->ioaddr + DMA_CUR_RX_BUF_ADDR);
284 } else {
285 /* MAC registers */
286 for (i = 0; i < 55; i++)
287 reg_space[i] = readl(priv->ioaddr + (i * 4));
288 /* DMA registers */
289 for (i = 0; i < 22; i++)
290 reg_space[i + 55] =
291 readl(priv->ioaddr + (DMA_BUS_MODE + (i * 4)));
292 }
293 }
294
295 static void
296 stmmac_get_pauseparam(struct net_device *netdev,
297 struct ethtool_pauseparam *pause)
298 {
299 struct stmmac_priv *priv = netdev_priv(netdev);
300
301 spin_lock(&priv->lock);
302
303 pause->rx_pause = 0;
304 pause->tx_pause = 0;
305 pause->autoneg = priv->phydev->autoneg;
306
307 if (priv->flow_ctrl & FLOW_RX)
308 pause->rx_pause = 1;
309 if (priv->flow_ctrl & FLOW_TX)
310 pause->tx_pause = 1;
311
312 spin_unlock(&priv->lock);
313 }
314
315 static int
316 stmmac_set_pauseparam(struct net_device *netdev,
317 struct ethtool_pauseparam *pause)
318 {
319 struct stmmac_priv *priv = netdev_priv(netdev);
320 struct phy_device *phy = priv->phydev;
321 int new_pause = FLOW_OFF;
322 int ret = 0;
323
324 spin_lock(&priv->lock);
325
326 if (pause->rx_pause)
327 new_pause |= FLOW_RX;
328 if (pause->tx_pause)
329 new_pause |= FLOW_TX;
330
331 priv->flow_ctrl = new_pause;
332 phy->autoneg = pause->autoneg;
333
334 if (phy->autoneg) {
335 if (netif_running(netdev))
336 ret = phy_start_aneg(phy);
337 } else
338 priv->hw->mac->flow_ctrl(priv->ioaddr, phy->duplex,
339 priv->flow_ctrl, priv->pause);
340 spin_unlock(&priv->lock);
341 return ret;
342 }
343
344 static void stmmac_get_ethtool_stats(struct net_device *dev,
345 struct ethtool_stats *dummy, u64 *data)
346 {
347 struct stmmac_priv *priv = netdev_priv(dev);
348 int i, j = 0;
349
350 /* Update the DMA HW counters for dwmac10/100 */
351 if (!priv->plat->has_gmac)
352 priv->hw->dma->dma_diagnostic_fr(&dev->stats,
353 (void *) &priv->xstats,
354 priv->ioaddr);
355 else {
356 /* If supported, for new GMAC chips expose the MMC counters */
357 if (priv->dma_cap.rmon) {
358 dwmac_mmc_read(priv->ioaddr, &priv->mmc);
359
360 for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
361 char *p;
362 p = (char *)priv + stmmac_mmc[i].stat_offset;
363
364 data[j++] = (stmmac_mmc[i].sizeof_stat ==
365 sizeof(u64)) ? (*(u64 *)p) :
366 (*(u32 *)p);
367 }
368 }
369 }
370 for (i = 0; i < STMMAC_STATS_LEN; i++) {
371 char *p = (char *)priv + stmmac_gstrings_stats[i].stat_offset;
372 data[j++] = (stmmac_gstrings_stats[i].sizeof_stat ==
373 sizeof(u64)) ? (*(u64 *)p) : (*(u32 *)p);
374 }
375 }
376
377 static int stmmac_get_sset_count(struct net_device *netdev, int sset)
378 {
379 struct stmmac_priv *priv = netdev_priv(netdev);
380 int len;
381
382 switch (sset) {
383 case ETH_SS_STATS:
384 len = STMMAC_STATS_LEN;
385
386 if (priv->dma_cap.rmon)
387 len += STMMAC_MMC_STATS_LEN;
388
389 return len;
390 default:
391 return -EOPNOTSUPP;
392 }
393 }
394
395 static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data)
396 {
397 int i;
398 u8 *p = data;
399 struct stmmac_priv *priv = netdev_priv(dev);
400
401 switch (stringset) {
402 case ETH_SS_STATS:
403 if (priv->dma_cap.rmon)
404 for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
405 memcpy(p, stmmac_mmc[i].stat_string,
406 ETH_GSTRING_LEN);
407 p += ETH_GSTRING_LEN;
408 }
409 for (i = 0; i < STMMAC_STATS_LEN; i++) {
410 memcpy(p, stmmac_gstrings_stats[i].stat_string,
411 ETH_GSTRING_LEN);
412 p += ETH_GSTRING_LEN;
413 }
414 break;
415 default:
416 WARN_ON(1);
417 break;
418 }
419 }
420
421 /* Currently only support WOL through Magic packet. */
422 static void stmmac_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
423 {
424 struct stmmac_priv *priv = netdev_priv(dev);
425
426 spin_lock_irq(&priv->lock);
427 if (device_can_wakeup(priv->device)) {
428 wol->supported = WAKE_MAGIC | WAKE_UCAST;
429 wol->wolopts = priv->wolopts;
430 }
431 spin_unlock_irq(&priv->lock);
432 }
433
434 static int stmmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
435 {
436 struct stmmac_priv *priv = netdev_priv(dev);
437 u32 support = WAKE_MAGIC | WAKE_UCAST;
438
439 /* By default almost all GMAC devices support the WoL via
440 * magic frame but we can disable it if the HW capability
441 * register shows no support for pmt_magic_frame. */
442 if ((priv->hw_cap_support) && (!priv->dma_cap.pmt_magic_frame))
443 wol->wolopts &= ~WAKE_MAGIC;
444
445 if (!device_can_wakeup(priv->device))
446 return -EINVAL;
447
448 if (wol->wolopts & ~support)
449 return -EINVAL;
450
451 if (wol->wolopts) {
452 pr_info("stmmac: wakeup enable\n");
453 device_set_wakeup_enable(priv->device, 1);
454 enable_irq_wake(priv->wol_irq);
455 } else {
456 device_set_wakeup_enable(priv->device, 0);
457 disable_irq_wake(priv->wol_irq);
458 }
459
460 spin_lock_irq(&priv->lock);
461 priv->wolopts = wol->wolopts;
462 spin_unlock_irq(&priv->lock);
463
464 return 0;
465 }
466
467 static const struct ethtool_ops stmmac_ethtool_ops = {
468 .begin = stmmac_check_if_running,
469 .get_drvinfo = stmmac_ethtool_getdrvinfo,
470 .get_settings = stmmac_ethtool_getsettings,
471 .set_settings = stmmac_ethtool_setsettings,
472 .get_msglevel = stmmac_ethtool_getmsglevel,
473 .set_msglevel = stmmac_ethtool_setmsglevel,
474 .get_regs = stmmac_ethtool_gregs,
475 .get_regs_len = stmmac_ethtool_get_regs_len,
476 .get_link = ethtool_op_get_link,
477 .get_pauseparam = stmmac_get_pauseparam,
478 .set_pauseparam = stmmac_set_pauseparam,
479 .get_ethtool_stats = stmmac_get_ethtool_stats,
480 .get_strings = stmmac_get_strings,
481 .get_wol = stmmac_get_wol,
482 .set_wol = stmmac_set_wol,
483 .get_sset_count = stmmac_get_sset_count,
484 };
485
486 void stmmac_set_ethtool_ops(struct net_device *netdev)
487 {
488 SET_ETHTOOL_OPS(netdev, &stmmac_ethtool_ops);
489 }