stmmac: priv->lock can be used uninitialized
[linux-2.6.git] / drivers / net / stmmac / stmmac_ethtool.c
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/mii.h>
28 #include <linux/phy.h>
29
30 #include "stmmac.h"
31 #include "dwmac_dma.h"
32
33 #define REG_SPACE_SIZE  0x1054
34 #define MAC100_ETHTOOL_NAME     "st_mac100"
35 #define GMAC_ETHTOOL_NAME       "st_gmac"
36
37 struct stmmac_stats {
38         char stat_string[ETH_GSTRING_LEN];
39         int sizeof_stat;
40         int stat_offset;
41 };
42
43 #define STMMAC_STAT(m)  \
44         { #m, FIELD_SIZEOF(struct stmmac_extra_stats, m),       \
45         offsetof(struct stmmac_priv, xstats.m)}
46
47 static const struct  stmmac_stats stmmac_gstrings_stats[] = {
48         STMMAC_STAT(tx_underflow),
49         STMMAC_STAT(tx_carrier),
50         STMMAC_STAT(tx_losscarrier),
51         STMMAC_STAT(tx_heartbeat),
52         STMMAC_STAT(tx_deferred),
53         STMMAC_STAT(tx_vlan),
54         STMMAC_STAT(rx_vlan),
55         STMMAC_STAT(tx_jabber),
56         STMMAC_STAT(tx_frame_flushed),
57         STMMAC_STAT(tx_payload_error),
58         STMMAC_STAT(tx_ip_header_error),
59         STMMAC_STAT(rx_desc),
60         STMMAC_STAT(rx_partial),
61         STMMAC_STAT(rx_runt),
62         STMMAC_STAT(rx_toolong),
63         STMMAC_STAT(rx_collision),
64         STMMAC_STAT(rx_crc),
65         STMMAC_STAT(rx_length),
66         STMMAC_STAT(rx_mii),
67         STMMAC_STAT(rx_multicast),
68         STMMAC_STAT(rx_gmac_overflow),
69         STMMAC_STAT(rx_watchdog),
70         STMMAC_STAT(da_rx_filter_fail),
71         STMMAC_STAT(sa_rx_filter_fail),
72         STMMAC_STAT(rx_missed_cntr),
73         STMMAC_STAT(rx_overflow_cntr),
74         STMMAC_STAT(tx_undeflow_irq),
75         STMMAC_STAT(tx_process_stopped_irq),
76         STMMAC_STAT(tx_jabber_irq),
77         STMMAC_STAT(rx_overflow_irq),
78         STMMAC_STAT(rx_buf_unav_irq),
79         STMMAC_STAT(rx_process_stopped_irq),
80         STMMAC_STAT(rx_watchdog_irq),
81         STMMAC_STAT(tx_early_irq),
82         STMMAC_STAT(fatal_bus_error_irq),
83         STMMAC_STAT(threshold),
84         STMMAC_STAT(tx_pkt_n),
85         STMMAC_STAT(rx_pkt_n),
86         STMMAC_STAT(poll_n),
87         STMMAC_STAT(sched_timer_n),
88         STMMAC_STAT(normal_irq_n),
89 };
90 #define STMMAC_STATS_LEN ARRAY_SIZE(stmmac_gstrings_stats)
91
92 static void stmmac_ethtool_getdrvinfo(struct net_device *dev,
93                                       struct ethtool_drvinfo *info)
94 {
95         struct stmmac_priv *priv = netdev_priv(dev);
96
97         if (!priv->is_gmac)
98                 strcpy(info->driver, MAC100_ETHTOOL_NAME);
99         else
100                 strcpy(info->driver, GMAC_ETHTOOL_NAME);
101
102         strcpy(info->version, DRV_MODULE_VERSION);
103         info->fw_version[0] = '\0';
104         info->n_stats = STMMAC_STATS_LEN;
105 }
106
107 static int stmmac_ethtool_getsettings(struct net_device *dev,
108                                       struct ethtool_cmd *cmd)
109 {
110         struct stmmac_priv *priv = netdev_priv(dev);
111         struct phy_device *phy = priv->phydev;
112         int rc;
113         if (phy == NULL) {
114                 pr_err("%s: %s: PHY is not registered\n",
115                        __func__, dev->name);
116                 return -ENODEV;
117         }
118         if (!netif_running(dev)) {
119                 pr_err("%s: interface is disabled: we cannot track "
120                 "link speed / duplex setting\n", dev->name);
121                 return -EBUSY;
122         }
123         cmd->transceiver = XCVR_INTERNAL;
124         spin_lock_irq(&priv->lock);
125         rc = phy_ethtool_gset(phy, cmd);
126         spin_unlock_irq(&priv->lock);
127         return rc;
128 }
129
130 static int stmmac_ethtool_setsettings(struct net_device *dev,
131                                       struct ethtool_cmd *cmd)
132 {
133         struct stmmac_priv *priv = netdev_priv(dev);
134         struct phy_device *phy = priv->phydev;
135         int rc;
136
137         spin_lock(&priv->lock);
138         rc = phy_ethtool_sset(phy, cmd);
139         spin_unlock(&priv->lock);
140
141         return rc;
142 }
143
144 static u32 stmmac_ethtool_getmsglevel(struct net_device *dev)
145 {
146         struct stmmac_priv *priv = netdev_priv(dev);
147         return priv->msg_enable;
148 }
149
150 static void stmmac_ethtool_setmsglevel(struct net_device *dev, u32 level)
151 {
152         struct stmmac_priv *priv = netdev_priv(dev);
153         priv->msg_enable = level;
154
155 }
156
157 static int stmmac_check_if_running(struct net_device *dev)
158 {
159         if (!netif_running(dev))
160                 return -EBUSY;
161         return 0;
162 }
163
164 static int stmmac_ethtool_get_regs_len(struct net_device *dev)
165 {
166         return REG_SPACE_SIZE;
167 }
168
169 static void stmmac_ethtool_gregs(struct net_device *dev,
170                           struct ethtool_regs *regs, void *space)
171 {
172         int i;
173         u32 *reg_space = (u32 *) space;
174
175         struct stmmac_priv *priv = netdev_priv(dev);
176
177         memset(reg_space, 0x0, REG_SPACE_SIZE);
178
179         if (!priv->is_gmac) {
180                 /* MAC registers */
181                 for (i = 0; i < 12; i++)
182                         reg_space[i] = readl(priv->ioaddr + (i * 4));
183                 /* DMA registers */
184                 for (i = 0; i < 9; i++)
185                         reg_space[i + 12] =
186                             readl(priv->ioaddr + (DMA_BUS_MODE + (i * 4)));
187                 reg_space[22] = readl(priv->ioaddr + DMA_CUR_TX_BUF_ADDR);
188                 reg_space[23] = readl(priv->ioaddr + DMA_CUR_RX_BUF_ADDR);
189         } else {
190                 /* MAC registers */
191                 for (i = 0; i < 55; i++)
192                         reg_space[i] = readl(priv->ioaddr + (i * 4));
193                 /* DMA registers */
194                 for (i = 0; i < 22; i++)
195                         reg_space[i + 55] =
196                             readl(priv->ioaddr + (DMA_BUS_MODE + (i * 4)));
197         }
198 }
199
200 static int stmmac_ethtool_set_tx_csum(struct net_device *netdev, u32 data)
201 {
202         if (data)
203                 netdev->features |= NETIF_F_HW_CSUM;
204         else
205                 netdev->features &= ~NETIF_F_HW_CSUM;
206
207         return 0;
208 }
209
210 static u32 stmmac_ethtool_get_rx_csum(struct net_device *dev)
211 {
212         struct stmmac_priv *priv = netdev_priv(dev);
213
214         return priv->rx_coe;
215 }
216
217 static void
218 stmmac_get_pauseparam(struct net_device *netdev,
219                       struct ethtool_pauseparam *pause)
220 {
221         struct stmmac_priv *priv = netdev_priv(netdev);
222
223         spin_lock(&priv->lock);
224
225         pause->rx_pause = 0;
226         pause->tx_pause = 0;
227         pause->autoneg = priv->phydev->autoneg;
228
229         if (priv->flow_ctrl & FLOW_RX)
230                 pause->rx_pause = 1;
231         if (priv->flow_ctrl & FLOW_TX)
232                 pause->tx_pause = 1;
233
234         spin_unlock(&priv->lock);
235 }
236
237 static int
238 stmmac_set_pauseparam(struct net_device *netdev,
239                       struct ethtool_pauseparam *pause)
240 {
241         struct stmmac_priv *priv = netdev_priv(netdev);
242         struct phy_device *phy = priv->phydev;
243         int new_pause = FLOW_OFF;
244         int ret = 0;
245
246         spin_lock(&priv->lock);
247
248         if (pause->rx_pause)
249                 new_pause |= FLOW_RX;
250         if (pause->tx_pause)
251                 new_pause |= FLOW_TX;
252
253         priv->flow_ctrl = new_pause;
254
255         if (phy->autoneg) {
256                 if (netif_running(netdev)) {
257                         struct ethtool_cmd cmd;
258                         /* auto-negotiation automatically restarted */
259                         cmd.cmd = ETHTOOL_NWAY_RST;
260                         cmd.supported = phy->supported;
261                         cmd.advertising = phy->advertising;
262                         cmd.autoneg = phy->autoneg;
263                         cmd.speed = phy->speed;
264                         cmd.duplex = phy->duplex;
265                         cmd.phy_address = phy->addr;
266                         ret = phy_ethtool_sset(phy, &cmd);
267                 }
268         } else
269                 priv->hw->mac->flow_ctrl(priv->ioaddr, phy->duplex,
270                                          priv->flow_ctrl, priv->pause);
271         spin_unlock(&priv->lock);
272         return ret;
273 }
274
275 static void stmmac_get_ethtool_stats(struct net_device *dev,
276                                  struct ethtool_stats *dummy, u64 *data)
277 {
278         struct stmmac_priv *priv = netdev_priv(dev);
279         int i;
280
281         /* Update HW stats if supported */
282         priv->hw->dma->dma_diagnostic_fr(&dev->stats, (void *) &priv->xstats,
283                                          priv->ioaddr);
284
285         for (i = 0; i < STMMAC_STATS_LEN; i++) {
286                 char *p = (char *)priv + stmmac_gstrings_stats[i].stat_offset;
287                 data[i] = (stmmac_gstrings_stats[i].sizeof_stat ==
288                 sizeof(u64)) ? (*(u64 *)p) : (*(u32 *)p);
289         }
290 }
291
292 static int stmmac_get_sset_count(struct net_device *netdev, int sset)
293 {
294         switch (sset) {
295         case ETH_SS_STATS:
296                 return STMMAC_STATS_LEN;
297         default:
298                 return -EOPNOTSUPP;
299         }
300 }
301
302 static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data)
303 {
304         int i;
305         u8 *p = data;
306
307         switch (stringset) {
308         case ETH_SS_STATS:
309                 for (i = 0; i < STMMAC_STATS_LEN; i++) {
310                         memcpy(p, stmmac_gstrings_stats[i].stat_string,
311                                 ETH_GSTRING_LEN);
312                         p += ETH_GSTRING_LEN;
313                 }
314                 break;
315         default:
316                 WARN_ON(1);
317                 break;
318         }
319 }
320
321 /* Currently only support WOL through Magic packet. */
322 static void stmmac_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
323 {
324         struct stmmac_priv *priv = netdev_priv(dev);
325
326         spin_lock_irq(&priv->lock);
327         if (device_can_wakeup(priv->device)) {
328                 wol->supported = WAKE_MAGIC;
329                 wol->wolopts = priv->wolopts;
330         }
331         spin_unlock_irq(&priv->lock);
332 }
333
334 static int stmmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
335 {
336         struct stmmac_priv *priv = netdev_priv(dev);
337         u32 support = WAKE_MAGIC;
338
339         if (!device_can_wakeup(priv->device))
340                 return -EINVAL;
341
342         if (wol->wolopts & ~support)
343                 return -EINVAL;
344
345         if (wol->wolopts) {
346                 pr_info("stmmac: wakeup enable\n");
347                 device_set_wakeup_enable(priv->device, 1);
348                 enable_irq_wake(dev->irq);
349         } else {
350                 device_set_wakeup_enable(priv->device, 0);
351                 disable_irq_wake(dev->irq);
352         }
353
354         spin_lock_irq(&priv->lock);
355         priv->wolopts = wol->wolopts;
356         spin_unlock_irq(&priv->lock);
357
358         return 0;
359 }
360
361 static struct ethtool_ops stmmac_ethtool_ops = {
362         .begin = stmmac_check_if_running,
363         .get_drvinfo = stmmac_ethtool_getdrvinfo,
364         .get_settings = stmmac_ethtool_getsettings,
365         .set_settings = stmmac_ethtool_setsettings,
366         .get_msglevel = stmmac_ethtool_getmsglevel,
367         .set_msglevel = stmmac_ethtool_setmsglevel,
368         .get_regs = stmmac_ethtool_gregs,
369         .get_regs_len = stmmac_ethtool_get_regs_len,
370         .get_link = ethtool_op_get_link,
371         .get_rx_csum = stmmac_ethtool_get_rx_csum,
372         .get_tx_csum = ethtool_op_get_tx_csum,
373         .set_tx_csum = stmmac_ethtool_set_tx_csum,
374         .get_sg = ethtool_op_get_sg,
375         .set_sg = ethtool_op_set_sg,
376         .get_pauseparam = stmmac_get_pauseparam,
377         .set_pauseparam = stmmac_set_pauseparam,
378         .get_ethtool_stats = stmmac_get_ethtool_stats,
379         .get_strings = stmmac_get_strings,
380         .get_wol = stmmac_get_wol,
381         .set_wol = stmmac_set_wol,
382         .get_sset_count = stmmac_get_sset_count,
383         .get_tso = ethtool_op_get_tso,
384         .set_tso = ethtool_op_set_tso,
385 };
386
387 void stmmac_set_ethtool_ops(struct net_device *netdev)
388 {
389         SET_ETHTOOL_OPS(netdev, &stmmac_ethtool_ops);
390 }