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47dd7a54 GC |
1 | /******************************************************************************* |
2 | This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers. | |
3 | ST Ethernet IPs are built around a Synopsys IP Core. | |
4 | ||
286a8372 | 5 | Copyright(C) 2007-2011 STMicroelectronics Ltd |
47dd7a54 GC |
6 | |
7 | This program is free software; you can redistribute it and/or modify it | |
8 | under the terms and conditions of the GNU General Public License, | |
9 | version 2, as published by the Free Software Foundation. | |
10 | ||
11 | This program is distributed in the hope it will be useful, but WITHOUT | |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License along with | |
17 | this program; if not, write to the Free Software Foundation, Inc., | |
18 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | ||
20 | The full GNU General Public License is included in this distribution in | |
21 | the file called "COPYING". | |
22 | ||
23 | Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> | |
24 | ||
25 | Documentation available at: | |
26 | http://www.stlinux.com | |
27 | Support available at: | |
28 | https://bugzilla.stlinux.com/ | |
29 | *******************************************************************************/ | |
30 | ||
6a81c26f | 31 | #include <linux/clk.h> |
47dd7a54 GC |
32 | #include <linux/kernel.h> |
33 | #include <linux/interrupt.h> | |
47dd7a54 GC |
34 | #include <linux/ip.h> |
35 | #include <linux/tcp.h> | |
36 | #include <linux/skbuff.h> | |
37 | #include <linux/ethtool.h> | |
38 | #include <linux/if_ether.h> | |
39 | #include <linux/crc32.h> | |
40 | #include <linux/mii.h> | |
01789349 | 41 | #include <linux/if.h> |
47dd7a54 GC |
42 | #include <linux/if_vlan.h> |
43 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 44 | #include <linux/slab.h> |
70c71606 | 45 | #include <linux/prefetch.h> |
7ac29055 GC |
46 | #ifdef CONFIG_STMMAC_DEBUG_FS |
47 | #include <linux/debugfs.h> | |
48 | #include <linux/seq_file.h> | |
49 | #endif | |
286a8372 | 50 | #include "stmmac.h" |
47dd7a54 | 51 | |
47dd7a54 GC |
52 | #undef STMMAC_DEBUG |
53 | /*#define STMMAC_DEBUG*/ | |
54 | #ifdef STMMAC_DEBUG | |
55 | #define DBG(nlevel, klevel, fmt, args...) \ | |
56 | ((void)(netif_msg_##nlevel(priv) && \ | |
57 | printk(KERN_##klevel fmt, ## args))) | |
58 | #else | |
59 | #define DBG(nlevel, klevel, fmt, args...) do { } while (0) | |
60 | #endif | |
61 | ||
62 | #undef STMMAC_RX_DEBUG | |
63 | /*#define STMMAC_RX_DEBUG*/ | |
64 | #ifdef STMMAC_RX_DEBUG | |
65 | #define RX_DBG(fmt, args...) printk(fmt, ## args) | |
66 | #else | |
67 | #define RX_DBG(fmt, args...) do { } while (0) | |
68 | #endif | |
69 | ||
70 | #undef STMMAC_XMIT_DEBUG | |
71 | /*#define STMMAC_XMIT_DEBUG*/ | |
72 | #ifdef STMMAC_TX_DEBUG | |
73 | #define TX_DBG(fmt, args...) printk(fmt, ## args) | |
74 | #else | |
75 | #define TX_DBG(fmt, args...) do { } while (0) | |
76 | #endif | |
77 | ||
78 | #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x) | |
79 | #define JUMBO_LEN 9000 | |
80 | ||
81 | /* Module parameters */ | |
82 | #define TX_TIMEO 5000 /* default 5 seconds */ | |
83 | static int watchdog = TX_TIMEO; | |
84 | module_param(watchdog, int, S_IRUGO | S_IWUSR); | |
85 | MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds"); | |
86 | ||
87 | static int debug = -1; /* -1: default, 0: no output, 16: all */ | |
88 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
89 | MODULE_PARM_DESC(debug, "Message Level (0: no output, 16: all)"); | |
90 | ||
bfab27a1 | 91 | int phyaddr = -1; |
47dd7a54 GC |
92 | module_param(phyaddr, int, S_IRUGO); |
93 | MODULE_PARM_DESC(phyaddr, "Physical device address"); | |
94 | ||
95 | #define DMA_TX_SIZE 256 | |
96 | static int dma_txsize = DMA_TX_SIZE; | |
97 | module_param(dma_txsize, int, S_IRUGO | S_IWUSR); | |
98 | MODULE_PARM_DESC(dma_txsize, "Number of descriptors in the TX list"); | |
99 | ||
100 | #define DMA_RX_SIZE 256 | |
101 | static int dma_rxsize = DMA_RX_SIZE; | |
102 | module_param(dma_rxsize, int, S_IRUGO | S_IWUSR); | |
103 | MODULE_PARM_DESC(dma_rxsize, "Number of descriptors in the RX list"); | |
104 | ||
105 | static int flow_ctrl = FLOW_OFF; | |
106 | module_param(flow_ctrl, int, S_IRUGO | S_IWUSR); | |
107 | MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]"); | |
108 | ||
109 | static int pause = PAUSE_TIME; | |
110 | module_param(pause, int, S_IRUGO | S_IWUSR); | |
111 | MODULE_PARM_DESC(pause, "Flow Control Pause Time"); | |
112 | ||
113 | #define TC_DEFAULT 64 | |
114 | static int tc = TC_DEFAULT; | |
115 | module_param(tc, int, S_IRUGO | S_IWUSR); | |
116 | MODULE_PARM_DESC(tc, "DMA threshold control value"); | |
117 | ||
47dd7a54 GC |
118 | #define DMA_BUFFER_SIZE BUF_SIZE_2KiB |
119 | static int buf_sz = DMA_BUFFER_SIZE; | |
120 | module_param(buf_sz, int, S_IRUGO | S_IWUSR); | |
121 | MODULE_PARM_DESC(buf_sz, "DMA buffer size"); | |
122 | ||
47dd7a54 GC |
123 | static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
124 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
125 | NETIF_MSG_IFDOWN | NETIF_MSG_TIMER); | |
126 | ||
d765955d GC |
127 | #define STMMAC_DEFAULT_LPI_TIMER 1000 |
128 | static int eee_timer = STMMAC_DEFAULT_LPI_TIMER; | |
129 | module_param(eee_timer, int, S_IRUGO | S_IWUSR); | |
130 | MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec"); | |
131 | #define STMMAC_LPI_TIMER(x) (jiffies + msecs_to_jiffies(x)) | |
132 | ||
47dd7a54 | 133 | static irqreturn_t stmmac_interrupt(int irq, void *dev_id); |
47dd7a54 | 134 | |
bfab27a1 GC |
135 | #ifdef CONFIG_STMMAC_DEBUG_FS |
136 | static int stmmac_init_fs(struct net_device *dev); | |
137 | static void stmmac_exit_fs(void); | |
138 | #endif | |
139 | ||
47dd7a54 GC |
140 | /** |
141 | * stmmac_verify_args - verify the driver parameters. | |
142 | * Description: it verifies if some wrong parameter is passed to the driver. | |
143 | * Note that wrong parameters are replaced with the default values. | |
144 | */ | |
145 | static void stmmac_verify_args(void) | |
146 | { | |
147 | if (unlikely(watchdog < 0)) | |
148 | watchdog = TX_TIMEO; | |
149 | if (unlikely(dma_rxsize < 0)) | |
150 | dma_rxsize = DMA_RX_SIZE; | |
151 | if (unlikely(dma_txsize < 0)) | |
152 | dma_txsize = DMA_TX_SIZE; | |
153 | if (unlikely((buf_sz < DMA_BUFFER_SIZE) || (buf_sz > BUF_SIZE_16KiB))) | |
154 | buf_sz = DMA_BUFFER_SIZE; | |
155 | if (unlikely(flow_ctrl > 1)) | |
156 | flow_ctrl = FLOW_AUTO; | |
157 | else if (likely(flow_ctrl < 0)) | |
158 | flow_ctrl = FLOW_OFF; | |
159 | if (unlikely((pause < 0) || (pause > 0xffff))) | |
160 | pause = PAUSE_TIME; | |
d765955d GC |
161 | if (eee_timer < 0) |
162 | eee_timer = STMMAC_DEFAULT_LPI_TIMER; | |
47dd7a54 GC |
163 | } |
164 | ||
cd7201f4 GC |
165 | static void stmmac_clk_csr_set(struct stmmac_priv *priv) |
166 | { | |
cd7201f4 GC |
167 | u32 clk_rate; |
168 | ||
169 | clk_rate = clk_get_rate(priv->stmmac_clk); | |
170 | ||
171 | /* Platform provided default clk_csr would be assumed valid | |
172 | * for all other cases except for the below mentioned ones. */ | |
173 | if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) { | |
174 | if (clk_rate < CSR_F_35M) | |
175 | priv->clk_csr = STMMAC_CSR_20_35M; | |
176 | else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M)) | |
177 | priv->clk_csr = STMMAC_CSR_35_60M; | |
178 | else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M)) | |
179 | priv->clk_csr = STMMAC_CSR_60_100M; | |
180 | else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M)) | |
181 | priv->clk_csr = STMMAC_CSR_100_150M; | |
182 | else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M)) | |
183 | priv->clk_csr = STMMAC_CSR_150_250M; | |
184 | else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M)) | |
185 | priv->clk_csr = STMMAC_CSR_250_300M; | |
186 | } /* For values higher than the IEEE 802.3 specified frequency | |
187 | * we can not estimate the proper divider as it is not known | |
188 | * the frequency of clk_csr_i. So we do not change the default | |
189 | * divider. */ | |
cd7201f4 GC |
190 | } |
191 | ||
47dd7a54 GC |
192 | #if defined(STMMAC_XMIT_DEBUG) || defined(STMMAC_RX_DEBUG) |
193 | static void print_pkt(unsigned char *buf, int len) | |
194 | { | |
195 | int j; | |
196 | pr_info("len = %d byte, buf addr: 0x%p", len, buf); | |
197 | for (j = 0; j < len; j++) { | |
198 | if ((j % 16) == 0) | |
199 | pr_info("\n %03x:", j); | |
200 | pr_info(" %02x", buf[j]); | |
201 | } | |
202 | pr_info("\n"); | |
47dd7a54 GC |
203 | } |
204 | #endif | |
205 | ||
206 | /* minimum number of free TX descriptors required to wake up TX process */ | |
207 | #define STMMAC_TX_THRESH(x) (x->dma_tx_size/4) | |
208 | ||
209 | static inline u32 stmmac_tx_avail(struct stmmac_priv *priv) | |
210 | { | |
211 | return priv->dirty_tx + priv->dma_tx_size - priv->cur_tx - 1; | |
212 | } | |
213 | ||
9dfeb4d9 GC |
214 | /* On some ST platforms, some HW system configuraton registers have to be |
215 | * set according to the link speed negotiated. | |
216 | */ | |
217 | static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv) | |
218 | { | |
219 | struct phy_device *phydev = priv->phydev; | |
220 | ||
221 | if (likely(priv->plat->fix_mac_speed)) | |
222 | priv->plat->fix_mac_speed(priv->plat->bsp_priv, | |
223 | phydev->speed); | |
224 | } | |
225 | ||
d765955d GC |
226 | static void stmmac_enable_eee_mode(struct stmmac_priv *priv) |
227 | { | |
228 | /* Check and enter in LPI mode */ | |
229 | if ((priv->dirty_tx == priv->cur_tx) && | |
230 | (priv->tx_path_in_lpi_mode == false)) | |
231 | priv->hw->mac->set_eee_mode(priv->ioaddr); | |
232 | } | |
233 | ||
234 | void stmmac_disable_eee_mode(struct stmmac_priv *priv) | |
235 | { | |
236 | /* Exit and disable EEE in case of we are are in LPI state. */ | |
237 | priv->hw->mac->reset_eee_mode(priv->ioaddr); | |
238 | del_timer_sync(&priv->eee_ctrl_timer); | |
239 | priv->tx_path_in_lpi_mode = false; | |
240 | } | |
241 | ||
242 | /** | |
243 | * stmmac_eee_ctrl_timer | |
244 | * @arg : data hook | |
245 | * Description: | |
246 | * If there is no data transfer and if we are not in LPI state, | |
247 | * then MAC Transmitter can be moved to LPI state. | |
248 | */ | |
249 | static void stmmac_eee_ctrl_timer(unsigned long arg) | |
250 | { | |
251 | struct stmmac_priv *priv = (struct stmmac_priv *)arg; | |
252 | ||
253 | stmmac_enable_eee_mode(priv); | |
254 | mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_TIMER(eee_timer)); | |
255 | } | |
256 | ||
257 | /** | |
258 | * stmmac_eee_init | |
259 | * @priv: private device pointer | |
260 | * Description: | |
261 | * If the EEE support has been enabled while configuring the driver, | |
262 | * if the GMAC actually supports the EEE (from the HW cap reg) and the | |
263 | * phy can also manage EEE, so enable the LPI state and start the timer | |
264 | * to verify if the tx path can enter in LPI state. | |
265 | */ | |
266 | bool stmmac_eee_init(struct stmmac_priv *priv) | |
267 | { | |
268 | bool ret = false; | |
269 | ||
270 | /* MAC core supports the EEE feature. */ | |
271 | if (priv->dma_cap.eee) { | |
272 | /* Check if the PHY supports EEE */ | |
273 | if (phy_init_eee(priv->phydev, 1)) | |
274 | goto out; | |
275 | ||
276 | priv->eee_active = 1; | |
277 | init_timer(&priv->eee_ctrl_timer); | |
278 | priv->eee_ctrl_timer.function = stmmac_eee_ctrl_timer; | |
279 | priv->eee_ctrl_timer.data = (unsigned long)priv; | |
280 | priv->eee_ctrl_timer.expires = STMMAC_LPI_TIMER(eee_timer); | |
281 | add_timer(&priv->eee_ctrl_timer); | |
282 | ||
283 | priv->hw->mac->set_eee_timer(priv->ioaddr, | |
284 | STMMAC_DEFAULT_LIT_LS_TIMER, | |
285 | priv->tx_lpi_timer); | |
286 | ||
287 | pr_info("stmmac: Energy-Efficient Ethernet initialized\n"); | |
288 | ||
289 | ret = true; | |
290 | } | |
291 | out: | |
292 | return ret; | |
293 | } | |
294 | ||
295 | static void stmmac_eee_adjust(struct stmmac_priv *priv) | |
296 | { | |
297 | /* When the EEE has been already initialised we have to | |
298 | * modify the PLS bit in the LPI ctrl & status reg according | |
299 | * to the PHY link status. For this reason. | |
300 | */ | |
301 | if (priv->eee_enabled) | |
302 | priv->hw->mac->set_eee_pls(priv->ioaddr, priv->phydev->link); | |
303 | } | |
304 | ||
47dd7a54 GC |
305 | /** |
306 | * stmmac_adjust_link | |
307 | * @dev: net device structure | |
308 | * Description: it adjusts the link parameters. | |
309 | */ | |
310 | static void stmmac_adjust_link(struct net_device *dev) | |
311 | { | |
312 | struct stmmac_priv *priv = netdev_priv(dev); | |
313 | struct phy_device *phydev = priv->phydev; | |
47dd7a54 GC |
314 | unsigned long flags; |
315 | int new_state = 0; | |
316 | unsigned int fc = priv->flow_ctrl, pause_time = priv->pause; | |
317 | ||
318 | if (phydev == NULL) | |
319 | return; | |
320 | ||
321 | DBG(probe, DEBUG, "stmmac_adjust_link: called. address %d link %d\n", | |
322 | phydev->addr, phydev->link); | |
323 | ||
324 | spin_lock_irqsave(&priv->lock, flags); | |
d765955d | 325 | |
47dd7a54 | 326 | if (phydev->link) { |
ad01b7d4 | 327 | u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG); |
47dd7a54 GC |
328 | |
329 | /* Now we make sure that we can be in full duplex mode. | |
330 | * If not, we operate in half-duplex mode. */ | |
331 | if (phydev->duplex != priv->oldduplex) { | |
332 | new_state = 1; | |
333 | if (!(phydev->duplex)) | |
db98a0b0 | 334 | ctrl &= ~priv->hw->link.duplex; |
47dd7a54 | 335 | else |
db98a0b0 | 336 | ctrl |= priv->hw->link.duplex; |
47dd7a54 GC |
337 | priv->oldduplex = phydev->duplex; |
338 | } | |
339 | /* Flow Control operation */ | |
340 | if (phydev->pause) | |
ad01b7d4 | 341 | priv->hw->mac->flow_ctrl(priv->ioaddr, phydev->duplex, |
db98a0b0 | 342 | fc, pause_time); |
47dd7a54 GC |
343 | |
344 | if (phydev->speed != priv->speed) { | |
345 | new_state = 1; | |
346 | switch (phydev->speed) { | |
347 | case 1000: | |
9dfeb4d9 | 348 | if (likely(priv->plat->has_gmac)) |
db98a0b0 | 349 | ctrl &= ~priv->hw->link.port; |
cf3f047b | 350 | stmmac_hw_fix_mac_speed(priv); |
47dd7a54 GC |
351 | break; |
352 | case 100: | |
353 | case 10: | |
9dfeb4d9 | 354 | if (priv->plat->has_gmac) { |
db98a0b0 | 355 | ctrl |= priv->hw->link.port; |
47dd7a54 | 356 | if (phydev->speed == SPEED_100) { |
db98a0b0 | 357 | ctrl |= priv->hw->link.speed; |
47dd7a54 | 358 | } else { |
db98a0b0 | 359 | ctrl &= ~(priv->hw->link.speed); |
47dd7a54 GC |
360 | } |
361 | } else { | |
db98a0b0 | 362 | ctrl &= ~priv->hw->link.port; |
47dd7a54 | 363 | } |
9dfeb4d9 | 364 | stmmac_hw_fix_mac_speed(priv); |
47dd7a54 GC |
365 | break; |
366 | default: | |
367 | if (netif_msg_link(priv)) | |
368 | pr_warning("%s: Speed (%d) is not 10" | |
369 | " or 100!\n", dev->name, phydev->speed); | |
370 | break; | |
371 | } | |
372 | ||
373 | priv->speed = phydev->speed; | |
374 | } | |
375 | ||
ad01b7d4 | 376 | writel(ctrl, priv->ioaddr + MAC_CTRL_REG); |
47dd7a54 GC |
377 | |
378 | if (!priv->oldlink) { | |
379 | new_state = 1; | |
380 | priv->oldlink = 1; | |
381 | } | |
382 | } else if (priv->oldlink) { | |
383 | new_state = 1; | |
384 | priv->oldlink = 0; | |
385 | priv->speed = 0; | |
386 | priv->oldduplex = -1; | |
387 | } | |
388 | ||
389 | if (new_state && netif_msg_link(priv)) | |
390 | phy_print_status(phydev); | |
391 | ||
d765955d GC |
392 | stmmac_eee_adjust(priv); |
393 | ||
47dd7a54 GC |
394 | spin_unlock_irqrestore(&priv->lock, flags); |
395 | ||
396 | DBG(probe, DEBUG, "stmmac_adjust_link: exiting\n"); | |
397 | } | |
398 | ||
399 | /** | |
400 | * stmmac_init_phy - PHY initialization | |
401 | * @dev: net device structure | |
402 | * Description: it initializes the driver's PHY state, and attaches the PHY | |
403 | * to the mac driver. | |
404 | * Return value: | |
405 | * 0 on success | |
406 | */ | |
407 | static int stmmac_init_phy(struct net_device *dev) | |
408 | { | |
409 | struct stmmac_priv *priv = netdev_priv(dev); | |
410 | struct phy_device *phydev; | |
d765955d | 411 | char phy_id_fmt[MII_BUS_ID_SIZE + 3]; |
109cdd66 | 412 | char bus_id[MII_BUS_ID_SIZE]; |
79ee1dc3 | 413 | int interface = priv->plat->interface; |
47dd7a54 GC |
414 | priv->oldlink = 0; |
415 | priv->speed = 0; | |
416 | priv->oldduplex = -1; | |
417 | ||
f142af2e SK |
418 | if (priv->plat->phy_bus_name) |
419 | snprintf(bus_id, MII_BUS_ID_SIZE, "%s-%x", | |
420 | priv->plat->phy_bus_name, priv->plat->bus_id); | |
421 | else | |
422 | snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x", | |
423 | priv->plat->bus_id); | |
424 | ||
d765955d | 425 | snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id, |
36bcfe7d | 426 | priv->plat->phy_addr); |
d765955d | 427 | pr_debug("stmmac_init_phy: trying to attach to %s\n", phy_id_fmt); |
47dd7a54 | 428 | |
d765955d GC |
429 | phydev = phy_connect(dev, phy_id_fmt, &stmmac_adjust_link, 0, |
430 | interface); | |
47dd7a54 GC |
431 | |
432 | if (IS_ERR(phydev)) { | |
433 | pr_err("%s: Could not attach to PHY\n", dev->name); | |
434 | return PTR_ERR(phydev); | |
435 | } | |
436 | ||
79ee1dc3 | 437 | /* Stop Advertising 1000BASE Capability if interface is not GMII */ |
c5b9b4e4 SK |
438 | if ((interface == PHY_INTERFACE_MODE_MII) || |
439 | (interface == PHY_INTERFACE_MODE_RMII)) | |
440 | phydev->advertising &= ~(SUPPORTED_1000baseT_Half | | |
441 | SUPPORTED_1000baseT_Full); | |
79ee1dc3 | 442 | |
47dd7a54 GC |
443 | /* |
444 | * Broken HW is sometimes missing the pull-up resistor on the | |
445 | * MDIO line, which results in reads to non-existent devices returning | |
446 | * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent | |
447 | * device as well. | |
448 | * Note: phydev->phy_id is the result of reading the UID PHY registers. | |
449 | */ | |
450 | if (phydev->phy_id == 0) { | |
451 | phy_disconnect(phydev); | |
452 | return -ENODEV; | |
453 | } | |
454 | pr_debug("stmmac_init_phy: %s: attached to PHY (UID 0x%x)" | |
36bcfe7d | 455 | " Link = %d\n", dev->name, phydev->phy_id, phydev->link); |
47dd7a54 GC |
456 | |
457 | priv->phydev = phydev; | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
47dd7a54 GC |
462 | /** |
463 | * display_ring | |
464 | * @p: pointer to the ring. | |
465 | * @size: size of the ring. | |
466 | * Description: display all the descriptors within the ring. | |
467 | */ | |
468 | static void display_ring(struct dma_desc *p, int size) | |
469 | { | |
470 | struct tmp_s { | |
471 | u64 a; | |
472 | unsigned int b; | |
473 | unsigned int c; | |
474 | }; | |
475 | int i; | |
476 | for (i = 0; i < size; i++) { | |
477 | struct tmp_s *x = (struct tmp_s *)(p + i); | |
478 | pr_info("\t%d [0x%x]: DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", | |
479 | i, (unsigned int)virt_to_phys(&p[i]), | |
480 | (unsigned int)(x->a), (unsigned int)((x->a) >> 32), | |
481 | x->b, x->c); | |
482 | pr_info("\n"); | |
483 | } | |
484 | } | |
485 | ||
286a8372 GC |
486 | static int stmmac_set_bfsize(int mtu, int bufsize) |
487 | { | |
488 | int ret = bufsize; | |
489 | ||
490 | if (mtu >= BUF_SIZE_4KiB) | |
491 | ret = BUF_SIZE_8KiB; | |
492 | else if (mtu >= BUF_SIZE_2KiB) | |
493 | ret = BUF_SIZE_4KiB; | |
494 | else if (mtu >= DMA_BUFFER_SIZE) | |
495 | ret = BUF_SIZE_2KiB; | |
496 | else | |
497 | ret = DMA_BUFFER_SIZE; | |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
47dd7a54 GC |
502 | /** |
503 | * init_dma_desc_rings - init the RX/TX descriptor rings | |
504 | * @dev: net device structure | |
505 | * Description: this function initializes the DMA RX/TX descriptors | |
286a8372 GC |
506 | * and allocates the socket buffers. It suppors the chained and ring |
507 | * modes. | |
47dd7a54 GC |
508 | */ |
509 | static void init_dma_desc_rings(struct net_device *dev) | |
510 | { | |
511 | int i; | |
512 | struct stmmac_priv *priv = netdev_priv(dev); | |
513 | struct sk_buff *skb; | |
514 | unsigned int txsize = priv->dma_tx_size; | |
515 | unsigned int rxsize = priv->dma_rx_size; | |
286a8372 GC |
516 | unsigned int bfsize; |
517 | int dis_ic = 0; | |
518 | int des3_as_data_buf = 0; | |
47dd7a54 | 519 | |
286a8372 GC |
520 | /* Set the max buffer size according to the DESC mode |
521 | * and the MTU. Note that RING mode allows 16KiB bsize. */ | |
522 | bfsize = priv->hw->ring->set_16kib_bfsize(dev->mtu); | |
523 | ||
524 | if (bfsize == BUF_SIZE_16KiB) | |
525 | des3_as_data_buf = 1; | |
47dd7a54 | 526 | else |
286a8372 | 527 | bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz); |
47dd7a54 | 528 | |
47dd7a54 GC |
529 | DBG(probe, INFO, "stmmac: txsize %d, rxsize %d, bfsize %d\n", |
530 | txsize, rxsize, bfsize); | |
531 | ||
532 | priv->rx_skbuff_dma = kmalloc(rxsize * sizeof(dma_addr_t), GFP_KERNEL); | |
533 | priv->rx_skbuff = | |
534 | kmalloc(sizeof(struct sk_buff *) * rxsize, GFP_KERNEL); | |
535 | priv->dma_rx = | |
536 | (struct dma_desc *)dma_alloc_coherent(priv->device, | |
537 | rxsize * | |
538 | sizeof(struct dma_desc), | |
539 | &priv->dma_rx_phy, | |
540 | GFP_KERNEL); | |
541 | priv->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * txsize, | |
542 | GFP_KERNEL); | |
543 | priv->dma_tx = | |
544 | (struct dma_desc *)dma_alloc_coherent(priv->device, | |
545 | txsize * | |
546 | sizeof(struct dma_desc), | |
547 | &priv->dma_tx_phy, | |
548 | GFP_KERNEL); | |
549 | ||
550 | if ((priv->dma_rx == NULL) || (priv->dma_tx == NULL)) { | |
551 | pr_err("%s:ERROR allocating the DMA Tx/Rx desc\n", __func__); | |
552 | return; | |
553 | } | |
554 | ||
286a8372 | 555 | DBG(probe, INFO, "stmmac (%s) DMA desc: virt addr (Rx %p, " |
47dd7a54 GC |
556 | "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n", |
557 | dev->name, priv->dma_rx, priv->dma_tx, | |
558 | (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy); | |
559 | ||
560 | /* RX INITIALIZATION */ | |
561 | DBG(probe, INFO, "stmmac: SKB addresses:\n" | |
562 | "skb\t\tskb data\tdma data\n"); | |
563 | ||
564 | for (i = 0; i < rxsize; i++) { | |
565 | struct dma_desc *p = priv->dma_rx + i; | |
566 | ||
45db81e1 GC |
567 | skb = __netdev_alloc_skb(dev, bfsize + NET_IP_ALIGN, |
568 | GFP_KERNEL); | |
47dd7a54 GC |
569 | if (unlikely(skb == NULL)) { |
570 | pr_err("%s: Rx init fails; skb is NULL\n", __func__); | |
571 | break; | |
572 | } | |
45db81e1 | 573 | skb_reserve(skb, NET_IP_ALIGN); |
47dd7a54 GC |
574 | priv->rx_skbuff[i] = skb; |
575 | priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data, | |
576 | bfsize, DMA_FROM_DEVICE); | |
577 | ||
578 | p->des2 = priv->rx_skbuff_dma[i]; | |
286a8372 GC |
579 | |
580 | priv->hw->ring->init_desc3(des3_as_data_buf, p); | |
581 | ||
47dd7a54 GC |
582 | DBG(probe, INFO, "[%p]\t[%p]\t[%x]\n", priv->rx_skbuff[i], |
583 | priv->rx_skbuff[i]->data, priv->rx_skbuff_dma[i]); | |
584 | } | |
585 | priv->cur_rx = 0; | |
586 | priv->dirty_rx = (unsigned int)(i - rxsize); | |
587 | priv->dma_buf_sz = bfsize; | |
588 | buf_sz = bfsize; | |
589 | ||
590 | /* TX INITIALIZATION */ | |
591 | for (i = 0; i < txsize; i++) { | |
592 | priv->tx_skbuff[i] = NULL; | |
593 | priv->dma_tx[i].des2 = 0; | |
594 | } | |
286a8372 GC |
595 | |
596 | /* In case of Chained mode this sets the des3 to the next | |
597 | * element in the chain */ | |
598 | priv->hw->ring->init_dma_chain(priv->dma_rx, priv->dma_rx_phy, rxsize); | |
599 | priv->hw->ring->init_dma_chain(priv->dma_tx, priv->dma_tx_phy, txsize); | |
600 | ||
47dd7a54 GC |
601 | priv->dirty_tx = 0; |
602 | priv->cur_tx = 0; | |
603 | ||
604 | /* Clear the Rx/Tx descriptors */ | |
db98a0b0 GC |
605 | priv->hw->desc->init_rx_desc(priv->dma_rx, rxsize, dis_ic); |
606 | priv->hw->desc->init_tx_desc(priv->dma_tx, txsize); | |
47dd7a54 GC |
607 | |
608 | if (netif_msg_hw(priv)) { | |
609 | pr_info("RX descriptor ring:\n"); | |
610 | display_ring(priv->dma_rx, rxsize); | |
611 | pr_info("TX descriptor ring:\n"); | |
612 | display_ring(priv->dma_tx, txsize); | |
613 | } | |
47dd7a54 GC |
614 | } |
615 | ||
616 | static void dma_free_rx_skbufs(struct stmmac_priv *priv) | |
617 | { | |
618 | int i; | |
619 | ||
620 | for (i = 0; i < priv->dma_rx_size; i++) { | |
621 | if (priv->rx_skbuff[i]) { | |
622 | dma_unmap_single(priv->device, priv->rx_skbuff_dma[i], | |
623 | priv->dma_buf_sz, DMA_FROM_DEVICE); | |
624 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
625 | } | |
626 | priv->rx_skbuff[i] = NULL; | |
627 | } | |
47dd7a54 GC |
628 | } |
629 | ||
630 | static void dma_free_tx_skbufs(struct stmmac_priv *priv) | |
631 | { | |
632 | int i; | |
633 | ||
634 | for (i = 0; i < priv->dma_tx_size; i++) { | |
635 | if (priv->tx_skbuff[i] != NULL) { | |
636 | struct dma_desc *p = priv->dma_tx + i; | |
637 | if (p->des2) | |
638 | dma_unmap_single(priv->device, p->des2, | |
db98a0b0 GC |
639 | priv->hw->desc->get_tx_len(p), |
640 | DMA_TO_DEVICE); | |
47dd7a54 GC |
641 | dev_kfree_skb_any(priv->tx_skbuff[i]); |
642 | priv->tx_skbuff[i] = NULL; | |
643 | } | |
644 | } | |
47dd7a54 GC |
645 | } |
646 | ||
647 | static void free_dma_desc_resources(struct stmmac_priv *priv) | |
648 | { | |
649 | /* Release the DMA TX/RX socket buffers */ | |
650 | dma_free_rx_skbufs(priv); | |
651 | dma_free_tx_skbufs(priv); | |
652 | ||
653 | /* Free the region of consistent memory previously allocated for | |
654 | * the DMA */ | |
655 | dma_free_coherent(priv->device, | |
656 | priv->dma_tx_size * sizeof(struct dma_desc), | |
657 | priv->dma_tx, priv->dma_tx_phy); | |
658 | dma_free_coherent(priv->device, | |
659 | priv->dma_rx_size * sizeof(struct dma_desc), | |
660 | priv->dma_rx, priv->dma_rx_phy); | |
661 | kfree(priv->rx_skbuff_dma); | |
662 | kfree(priv->rx_skbuff); | |
663 | kfree(priv->tx_skbuff); | |
47dd7a54 GC |
664 | } |
665 | ||
47dd7a54 GC |
666 | /** |
667 | * stmmac_dma_operation_mode - HW DMA operation mode | |
668 | * @priv : pointer to the private device structure. | |
669 | * Description: it sets the DMA operation mode: tx/rx DMA thresholds | |
ebbb293f | 670 | * or Store-And-Forward capability. |
47dd7a54 GC |
671 | */ |
672 | static void stmmac_dma_operation_mode(struct stmmac_priv *priv) | |
673 | { | |
61b8013a SK |
674 | if (likely(priv->plat->force_sf_dma_mode || |
675 | ((priv->plat->tx_coe) && (!priv->no_csum_insertion)))) { | |
676 | /* | |
677 | * In case of GMAC, SF mode can be enabled | |
678 | * to perform the TX COE in HW. This depends on: | |
ebbb293f GC |
679 | * 1) TX COE if actually supported |
680 | * 2) There is no bugged Jumbo frame support | |
681 | * that needs to not insert csum in the TDES. | |
682 | */ | |
683 | priv->hw->dma->dma_mode(priv->ioaddr, | |
684 | SF_DMA_MODE, SF_DMA_MODE); | |
685 | tc = SF_DMA_MODE; | |
686 | } else | |
687 | priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE); | |
47dd7a54 GC |
688 | } |
689 | ||
47dd7a54 GC |
690 | /** |
691 | * stmmac_tx: | |
692 | * @priv: private driver structure | |
693 | * Description: it reclaims resources after transmission completes. | |
694 | */ | |
695 | static void stmmac_tx(struct stmmac_priv *priv) | |
696 | { | |
697 | unsigned int txsize = priv->dma_tx_size; | |
47dd7a54 | 698 | |
a9097a96 GC |
699 | spin_lock(&priv->tx_lock); |
700 | ||
47dd7a54 GC |
701 | while (priv->dirty_tx != priv->cur_tx) { |
702 | int last; | |
703 | unsigned int entry = priv->dirty_tx % txsize; | |
704 | struct sk_buff *skb = priv->tx_skbuff[entry]; | |
705 | struct dma_desc *p = priv->dma_tx + entry; | |
706 | ||
707 | /* Check if the descriptor is owned by the DMA. */ | |
db98a0b0 | 708 | if (priv->hw->desc->get_tx_owner(p)) |
47dd7a54 GC |
709 | break; |
710 | ||
711 | /* Verify tx error by looking at the last segment */ | |
db98a0b0 | 712 | last = priv->hw->desc->get_tx_ls(p); |
47dd7a54 GC |
713 | if (likely(last)) { |
714 | int tx_error = | |
db98a0b0 GC |
715 | priv->hw->desc->tx_status(&priv->dev->stats, |
716 | &priv->xstats, p, | |
ad01b7d4 | 717 | priv->ioaddr); |
47dd7a54 GC |
718 | if (likely(tx_error == 0)) { |
719 | priv->dev->stats.tx_packets++; | |
720 | priv->xstats.tx_pkt_n++; | |
721 | } else | |
722 | priv->dev->stats.tx_errors++; | |
723 | } | |
724 | TX_DBG("%s: curr %d, dirty %d\n", __func__, | |
725 | priv->cur_tx, priv->dirty_tx); | |
726 | ||
727 | if (likely(p->des2)) | |
728 | dma_unmap_single(priv->device, p->des2, | |
db98a0b0 | 729 | priv->hw->desc->get_tx_len(p), |
47dd7a54 | 730 | DMA_TO_DEVICE); |
286a8372 | 731 | priv->hw->ring->clean_desc3(p); |
47dd7a54 GC |
732 | |
733 | if (likely(skb != NULL)) { | |
acb600de | 734 | dev_kfree_skb(skb); |
47dd7a54 GC |
735 | priv->tx_skbuff[entry] = NULL; |
736 | } | |
737 | ||
db98a0b0 | 738 | priv->hw->desc->release_tx_desc(p); |
47dd7a54 | 739 | |
13497f58 | 740 | priv->dirty_tx++; |
47dd7a54 GC |
741 | } |
742 | if (unlikely(netif_queue_stopped(priv->dev) && | |
743 | stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv))) { | |
744 | netif_tx_lock(priv->dev); | |
745 | if (netif_queue_stopped(priv->dev) && | |
746 | stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv)) { | |
747 | TX_DBG("%s: restart transmit\n", __func__); | |
748 | netif_wake_queue(priv->dev); | |
749 | } | |
750 | netif_tx_unlock(priv->dev); | |
751 | } | |
d765955d GC |
752 | |
753 | if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) { | |
754 | stmmac_enable_eee_mode(priv); | |
755 | mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_TIMER(eee_timer)); | |
756 | } | |
a9097a96 | 757 | spin_unlock(&priv->tx_lock); |
47dd7a54 GC |
758 | } |
759 | ||
760 | static inline void stmmac_enable_irq(struct stmmac_priv *priv) | |
761 | { | |
7284a3f1 | 762 | priv->hw->dma->enable_dma_irq(priv->ioaddr); |
47dd7a54 GC |
763 | } |
764 | ||
765 | static inline void stmmac_disable_irq(struct stmmac_priv *priv) | |
766 | { | |
7284a3f1 | 767 | priv->hw->dma->disable_dma_irq(priv->ioaddr); |
47dd7a54 GC |
768 | } |
769 | ||
770 | static int stmmac_has_work(struct stmmac_priv *priv) | |
771 | { | |
772 | unsigned int has_work = 0; | |
773 | int rxret, tx_work = 0; | |
774 | ||
db98a0b0 | 775 | rxret = priv->hw->desc->get_rx_owner(priv->dma_rx + |
47dd7a54 GC |
776 | (priv->cur_rx % priv->dma_rx_size)); |
777 | ||
778 | if (priv->dirty_tx != priv->cur_tx) | |
779 | tx_work = 1; | |
780 | ||
781 | if (likely(!rxret || tx_work)) | |
782 | has_work = 1; | |
783 | ||
784 | return has_work; | |
785 | } | |
786 | ||
787 | static inline void _stmmac_schedule(struct stmmac_priv *priv) | |
788 | { | |
789 | if (likely(stmmac_has_work(priv))) { | |
790 | stmmac_disable_irq(priv); | |
791 | napi_schedule(&priv->napi); | |
792 | } | |
793 | } | |
794 | ||
47dd7a54 GC |
795 | /** |
796 | * stmmac_tx_err: | |
797 | * @priv: pointer to the private device structure | |
798 | * Description: it cleans the descriptors and restarts the transmission | |
799 | * in case of errors. | |
800 | */ | |
801 | static void stmmac_tx_err(struct stmmac_priv *priv) | |
802 | { | |
803 | netif_stop_queue(priv->dev); | |
804 | ||
ad01b7d4 | 805 | priv->hw->dma->stop_tx(priv->ioaddr); |
47dd7a54 | 806 | dma_free_tx_skbufs(priv); |
db98a0b0 | 807 | priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size); |
47dd7a54 GC |
808 | priv->dirty_tx = 0; |
809 | priv->cur_tx = 0; | |
ad01b7d4 | 810 | priv->hw->dma->start_tx(priv->ioaddr); |
47dd7a54 GC |
811 | |
812 | priv->dev->stats.tx_errors++; | |
813 | netif_wake_queue(priv->dev); | |
47dd7a54 GC |
814 | } |
815 | ||
47dd7a54 | 816 | |
aec7ff27 GC |
817 | static void stmmac_dma_interrupt(struct stmmac_priv *priv) |
818 | { | |
aec7ff27 GC |
819 | int status; |
820 | ||
ad01b7d4 | 821 | status = priv->hw->dma->dma_interrupt(priv->ioaddr, &priv->xstats); |
aec7ff27 GC |
822 | if (likely(status == handle_tx_rx)) |
823 | _stmmac_schedule(priv); | |
824 | ||
825 | else if (unlikely(status == tx_hard_error_bump_tc)) { | |
826 | /* Try to bump up the dma threshold on this failure */ | |
827 | if (unlikely(tc != SF_DMA_MODE) && (tc <= 256)) { | |
828 | tc += 64; | |
ad01b7d4 | 829 | priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE); |
aec7ff27 | 830 | priv->xstats.threshold = tc; |
47dd7a54 | 831 | } |
aec7ff27 GC |
832 | } else if (unlikely(status == tx_hard_error)) |
833 | stmmac_tx_err(priv); | |
47dd7a54 GC |
834 | } |
835 | ||
1c901a46 GC |
836 | static void stmmac_mmc_setup(struct stmmac_priv *priv) |
837 | { | |
838 | unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET | | |
839 | MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET; | |
840 | ||
4f795b25 GC |
841 | /* Mask MMC irq, counters are managed in SW and registers |
842 | * are cleared on each READ eventually. */ | |
1c901a46 | 843 | dwmac_mmc_intr_all_mask(priv->ioaddr); |
4f795b25 GC |
844 | |
845 | if (priv->dma_cap.rmon) { | |
846 | dwmac_mmc_ctrl(priv->ioaddr, mode); | |
847 | memset(&priv->mmc, 0, sizeof(struct stmmac_counters)); | |
848 | } else | |
aae54cff | 849 | pr_info(" No MAC Management Counters available\n"); |
1c901a46 GC |
850 | } |
851 | ||
f0b9d786 GC |
852 | static u32 stmmac_get_synopsys_id(struct stmmac_priv *priv) |
853 | { | |
854 | u32 hwid = priv->hw->synopsys_uid; | |
855 | ||
856 | /* Only check valid Synopsys Id because old MAC chips | |
857 | * have no HW registers where get the ID */ | |
858 | if (likely(hwid)) { | |
859 | u32 uid = ((hwid & 0x0000ff00) >> 8); | |
860 | u32 synid = (hwid & 0x000000ff); | |
861 | ||
cf3f047b | 862 | pr_info("stmmac - user ID: 0x%x, Synopsys ID: 0x%x\n", |
f0b9d786 GC |
863 | uid, synid); |
864 | ||
865 | return synid; | |
866 | } | |
867 | return 0; | |
868 | } | |
e7434821 | 869 | |
19e30c14 GC |
870 | /** |
871 | * stmmac_selec_desc_mode | |
ff3dd78c GC |
872 | * @priv : private structure |
873 | * Description: select the Enhanced/Alternate or Normal descriptors | |
874 | */ | |
19e30c14 GC |
875 | static void stmmac_selec_desc_mode(struct stmmac_priv *priv) |
876 | { | |
877 | if (priv->plat->enh_desc) { | |
878 | pr_info(" Enhanced/Alternate descriptors\n"); | |
879 | priv->hw->desc = &enh_desc_ops; | |
880 | } else { | |
881 | pr_info(" Normal descriptors\n"); | |
882 | priv->hw->desc = &ndesc_ops; | |
883 | } | |
884 | } | |
885 | ||
886 | /** | |
887 | * stmmac_get_hw_features | |
888 | * @priv : private device pointer | |
889 | * Description: | |
890 | * new GMAC chip generations have a new register to indicate the | |
891 | * presence of the optional feature/functions. | |
892 | * This can be also used to override the value passed through the | |
893 | * platform and necessary for old MAC10/100 and GMAC chips. | |
e7434821 GC |
894 | */ |
895 | static int stmmac_get_hw_features(struct stmmac_priv *priv) | |
896 | { | |
5e6efe88 | 897 | u32 hw_cap = 0; |
3c20f72f | 898 | |
5e6efe88 GC |
899 | if (priv->hw->dma->get_hw_feature) { |
900 | hw_cap = priv->hw->dma->get_hw_feature(priv->ioaddr); | |
e7434821 | 901 | |
1db123fb RK |
902 | priv->dma_cap.mbps_10_100 = (hw_cap & DMA_HW_FEAT_MIISEL); |
903 | priv->dma_cap.mbps_1000 = (hw_cap & DMA_HW_FEAT_GMIISEL) >> 1; | |
904 | priv->dma_cap.half_duplex = (hw_cap & DMA_HW_FEAT_HDSEL) >> 2; | |
905 | priv->dma_cap.hash_filter = (hw_cap & DMA_HW_FEAT_HASHSEL) >> 4; | |
906 | priv->dma_cap.multi_addr = | |
907 | (hw_cap & DMA_HW_FEAT_ADDMACADRSEL) >> 5; | |
908 | priv->dma_cap.pcs = (hw_cap & DMA_HW_FEAT_PCSSEL) >> 6; | |
909 | priv->dma_cap.sma_mdio = (hw_cap & DMA_HW_FEAT_SMASEL) >> 8; | |
910 | priv->dma_cap.pmt_remote_wake_up = | |
911 | (hw_cap & DMA_HW_FEAT_RWKSEL) >> 9; | |
912 | priv->dma_cap.pmt_magic_frame = | |
913 | (hw_cap & DMA_HW_FEAT_MGKSEL) >> 10; | |
19e30c14 | 914 | /* MMC */ |
1db123fb | 915 | priv->dma_cap.rmon = (hw_cap & DMA_HW_FEAT_MMCSEL) >> 11; |
e7434821 | 916 | /* IEEE 1588-2002*/ |
1db123fb RK |
917 | priv->dma_cap.time_stamp = |
918 | (hw_cap & DMA_HW_FEAT_TSVER1SEL) >> 12; | |
e7434821 | 919 | /* IEEE 1588-2008*/ |
1db123fb RK |
920 | priv->dma_cap.atime_stamp = |
921 | (hw_cap & DMA_HW_FEAT_TSVER2SEL) >> 13; | |
e7434821 | 922 | /* 802.3az - Energy-Efficient Ethernet (EEE) */ |
1db123fb RK |
923 | priv->dma_cap.eee = (hw_cap & DMA_HW_FEAT_EEESEL) >> 14; |
924 | priv->dma_cap.av = (hw_cap & DMA_HW_FEAT_AVSEL) >> 15; | |
e7434821 | 925 | /* TX and RX csum */ |
1db123fb RK |
926 | priv->dma_cap.tx_coe = (hw_cap & DMA_HW_FEAT_TXCOESEL) >> 16; |
927 | priv->dma_cap.rx_coe_type1 = | |
928 | (hw_cap & DMA_HW_FEAT_RXTYP1COE) >> 17; | |
929 | priv->dma_cap.rx_coe_type2 = | |
930 | (hw_cap & DMA_HW_FEAT_RXTYP2COE) >> 18; | |
931 | priv->dma_cap.rxfifo_over_2048 = | |
932 | (hw_cap & DMA_HW_FEAT_RXFIFOSIZE) >> 19; | |
e7434821 | 933 | /* TX and RX number of channels */ |
1db123fb RK |
934 | priv->dma_cap.number_rx_channel = |
935 | (hw_cap & DMA_HW_FEAT_RXCHCNT) >> 20; | |
936 | priv->dma_cap.number_tx_channel = | |
937 | (hw_cap & DMA_HW_FEAT_TXCHCNT) >> 22; | |
e7434821 | 938 | /* Alternate (enhanced) DESC mode*/ |
1db123fb RK |
939 | priv->dma_cap.enh_desc = |
940 | (hw_cap & DMA_HW_FEAT_ENHDESSEL) >> 24; | |
e7434821 | 941 | |
19e30c14 | 942 | } |
e7434821 GC |
943 | |
944 | return hw_cap; | |
945 | } | |
946 | ||
bfab27a1 GC |
947 | static void stmmac_check_ether_addr(struct stmmac_priv *priv) |
948 | { | |
949 | /* verify if the MAC address is valid, in case of failures it | |
950 | * generates a random MAC address */ | |
951 | if (!is_valid_ether_addr(priv->dev->dev_addr)) { | |
952 | priv->hw->mac->get_umac_addr((void __iomem *) | |
953 | priv->dev->base_addr, | |
954 | priv->dev->dev_addr, 0); | |
955 | if (!is_valid_ether_addr(priv->dev->dev_addr)) | |
f2cedb63 | 956 | eth_hw_addr_random(priv->dev); |
bfab27a1 GC |
957 | } |
958 | pr_warning("%s: device MAC address %pM\n", priv->dev->name, | |
959 | priv->dev->dev_addr); | |
960 | } | |
961 | ||
0f1f88a8 GC |
962 | static int stmmac_init_dma_engine(struct stmmac_priv *priv) |
963 | { | |
964 | int pbl = DEFAULT_DMA_PBL, fixed_burst = 0, burst_len = 0; | |
b9cde0a8 | 965 | int mixed_burst = 0; |
0f1f88a8 GC |
966 | |
967 | /* Some DMA parameters can be passed from the platform; | |
968 | * in case of these are not passed we keep a default | |
969 | * (good for all the chips) and init the DMA! */ | |
970 | if (priv->plat->dma_cfg) { | |
971 | pbl = priv->plat->dma_cfg->pbl; | |
972 | fixed_burst = priv->plat->dma_cfg->fixed_burst; | |
b9cde0a8 | 973 | mixed_burst = priv->plat->dma_cfg->mixed_burst; |
0f1f88a8 GC |
974 | burst_len = priv->plat->dma_cfg->burst_len; |
975 | } | |
976 | ||
b9cde0a8 | 977 | return priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst, |
0f1f88a8 GC |
978 | burst_len, priv->dma_tx_phy, |
979 | priv->dma_rx_phy); | |
980 | } | |
981 | ||
47dd7a54 GC |
982 | /** |
983 | * stmmac_open - open entry point of the driver | |
984 | * @dev : pointer to the device structure. | |
985 | * Description: | |
986 | * This function is the open entry point of the driver. | |
987 | * Return value: | |
988 | * 0 on success and an appropriate (-)ve integer as defined in errno.h | |
989 | * file on failure. | |
990 | */ | |
991 | static int stmmac_open(struct net_device *dev) | |
992 | { | |
993 | struct stmmac_priv *priv = netdev_priv(dev); | |
47dd7a54 GC |
994 | int ret; |
995 | ||
a630844d | 996 | clk_prepare_enable(priv->stmmac_clk); |
4bfcbd7a FV |
997 | |
998 | stmmac_check_ether_addr(priv); | |
999 | ||
f66ffe28 GC |
1000 | ret = stmmac_init_phy(dev); |
1001 | if (unlikely(ret)) { | |
1002 | pr_err("%s: Cannot attach to PHY (error: %d)\n", __func__, ret); | |
1003 | goto open_error; | |
1004 | } | |
47dd7a54 GC |
1005 | |
1006 | /* Create and initialize the TX/RX descriptors chains. */ | |
1007 | priv->dma_tx_size = STMMAC_ALIGN(dma_txsize); | |
1008 | priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize); | |
1009 | priv->dma_buf_sz = STMMAC_ALIGN(buf_sz); | |
1010 | init_dma_desc_rings(dev); | |
1011 | ||
1012 | /* DMA initialization and SW reset */ | |
0f1f88a8 | 1013 | ret = stmmac_init_dma_engine(priv); |
f66ffe28 | 1014 | if (ret < 0) { |
47dd7a54 | 1015 | pr_err("%s: DMA initialization failed\n", __func__); |
f66ffe28 | 1016 | goto open_error; |
47dd7a54 GC |
1017 | } |
1018 | ||
1019 | /* Copy the MAC addr into the HW */ | |
ad01b7d4 | 1020 | priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0); |
cf3f047b | 1021 | |
ca5f12c1 | 1022 | /* If required, perform hw setup of the bus. */ |
9dfeb4d9 GC |
1023 | if (priv->plat->bus_setup) |
1024 | priv->plat->bus_setup(priv->ioaddr); | |
cf3f047b | 1025 | |
47dd7a54 | 1026 | /* Initialize the MAC Core */ |
ad01b7d4 | 1027 | priv->hw->mac->core_init(priv->ioaddr); |
47dd7a54 | 1028 | |
f66ffe28 GC |
1029 | /* Request the IRQ lines */ |
1030 | ret = request_irq(dev->irq, stmmac_interrupt, | |
1031 | IRQF_SHARED, dev->name, dev); | |
1032 | if (unlikely(ret < 0)) { | |
1033 | pr_err("%s: ERROR: allocating the IRQ %d (error: %d)\n", | |
1034 | __func__, dev->irq, ret); | |
1035 | goto open_error; | |
1036 | } | |
1037 | ||
7a13f8f5 FV |
1038 | /* Request the Wake IRQ in case of another line is used for WoL */ |
1039 | if (priv->wol_irq != dev->irq) { | |
1040 | ret = request_irq(priv->wol_irq, stmmac_interrupt, | |
1041 | IRQF_SHARED, dev->name, dev); | |
1042 | if (unlikely(ret < 0)) { | |
1043 | pr_err("%s: ERROR: allocating the ext WoL IRQ %d " | |
1044 | "(error: %d)\n", __func__, priv->wol_irq, ret); | |
1045 | goto open_error_wolirq; | |
1046 | } | |
1047 | } | |
1048 | ||
d765955d GC |
1049 | /* Request the IRQ lines */ |
1050 | if (priv->lpi_irq != -ENXIO) { | |
1051 | ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED, | |
1052 | dev->name, dev); | |
1053 | if (unlikely(ret < 0)) { | |
1054 | pr_err("%s: ERROR: allocating the LPI IRQ %d (%d)\n", | |
1055 | __func__, priv->lpi_irq, ret); | |
1056 | goto open_error_lpiirq; | |
1057 | } | |
1058 | } | |
1059 | ||
47dd7a54 | 1060 | /* Enable the MAC Rx/Tx */ |
bfab27a1 | 1061 | stmmac_set_mac(priv->ioaddr, true); |
47dd7a54 GC |
1062 | |
1063 | /* Set the HW DMA mode and the COE */ | |
1064 | stmmac_dma_operation_mode(priv); | |
1065 | ||
1066 | /* Extra statistics */ | |
1067 | memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); | |
1068 | priv->xstats.threshold = tc; | |
1069 | ||
4f795b25 | 1070 | stmmac_mmc_setup(priv); |
1c901a46 | 1071 | |
bfab27a1 GC |
1072 | #ifdef CONFIG_STMMAC_DEBUG_FS |
1073 | ret = stmmac_init_fs(dev); | |
1074 | if (ret < 0) | |
cf3f047b | 1075 | pr_warning("%s: failed debugFS registration\n", __func__); |
bfab27a1 | 1076 | #endif |
47dd7a54 GC |
1077 | /* Start the ball rolling... */ |
1078 | DBG(probe, DEBUG, "%s: DMA RX/TX processes started...\n", dev->name); | |
ad01b7d4 GC |
1079 | priv->hw->dma->start_tx(priv->ioaddr); |
1080 | priv->hw->dma->start_rx(priv->ioaddr); | |
47dd7a54 | 1081 | |
47dd7a54 GC |
1082 | /* Dump DMA/MAC registers */ |
1083 | if (netif_msg_hw(priv)) { | |
ad01b7d4 GC |
1084 | priv->hw->mac->dump_regs(priv->ioaddr); |
1085 | priv->hw->dma->dump_regs(priv->ioaddr); | |
47dd7a54 GC |
1086 | } |
1087 | ||
1088 | if (priv->phydev) | |
1089 | phy_start(priv->phydev); | |
1090 | ||
d765955d GC |
1091 | priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS_TIMER; |
1092 | priv->eee_enabled = stmmac_eee_init(priv); | |
1093 | ||
47dd7a54 | 1094 | napi_enable(&priv->napi); |
47dd7a54 | 1095 | netif_start_queue(dev); |
f66ffe28 | 1096 | |
47dd7a54 | 1097 | return 0; |
f66ffe28 | 1098 | |
d765955d GC |
1099 | open_error_lpiirq: |
1100 | if (priv->wol_irq != dev->irq) | |
1101 | free_irq(priv->wol_irq, dev); | |
1102 | ||
7a13f8f5 FV |
1103 | open_error_wolirq: |
1104 | free_irq(dev->irq, dev); | |
1105 | ||
f66ffe28 | 1106 | open_error: |
f66ffe28 GC |
1107 | if (priv->phydev) |
1108 | phy_disconnect(priv->phydev); | |
1109 | ||
a630844d | 1110 | clk_disable_unprepare(priv->stmmac_clk); |
4bfcbd7a | 1111 | |
f66ffe28 | 1112 | return ret; |
47dd7a54 GC |
1113 | } |
1114 | ||
1115 | /** | |
1116 | * stmmac_release - close entry point of the driver | |
1117 | * @dev : device pointer. | |
1118 | * Description: | |
1119 | * This is the stop entry point of the driver. | |
1120 | */ | |
1121 | static int stmmac_release(struct net_device *dev) | |
1122 | { | |
1123 | struct stmmac_priv *priv = netdev_priv(dev); | |
1124 | ||
d765955d GC |
1125 | if (priv->eee_enabled) |
1126 | del_timer_sync(&priv->eee_ctrl_timer); | |
1127 | ||
47dd7a54 GC |
1128 | /* Stop and disconnect the PHY */ |
1129 | if (priv->phydev) { | |
1130 | phy_stop(priv->phydev); | |
1131 | phy_disconnect(priv->phydev); | |
1132 | priv->phydev = NULL; | |
1133 | } | |
1134 | ||
1135 | netif_stop_queue(dev); | |
1136 | ||
47dd7a54 | 1137 | napi_disable(&priv->napi); |
47dd7a54 GC |
1138 | |
1139 | /* Free the IRQ lines */ | |
1140 | free_irq(dev->irq, dev); | |
7a13f8f5 FV |
1141 | if (priv->wol_irq != dev->irq) |
1142 | free_irq(priv->wol_irq, dev); | |
d765955d GC |
1143 | if (priv->lpi_irq != -ENXIO) |
1144 | free_irq(priv->lpi_irq, dev); | |
47dd7a54 GC |
1145 | |
1146 | /* Stop TX/RX DMA and clear the descriptors */ | |
ad01b7d4 GC |
1147 | priv->hw->dma->stop_tx(priv->ioaddr); |
1148 | priv->hw->dma->stop_rx(priv->ioaddr); | |
47dd7a54 GC |
1149 | |
1150 | /* Release and free the Rx/Tx resources */ | |
1151 | free_dma_desc_resources(priv); | |
1152 | ||
19449bfc | 1153 | /* Disable the MAC Rx/Tx */ |
bfab27a1 | 1154 | stmmac_set_mac(priv->ioaddr, false); |
47dd7a54 GC |
1155 | |
1156 | netif_carrier_off(dev); | |
1157 | ||
bfab27a1 GC |
1158 | #ifdef CONFIG_STMMAC_DEBUG_FS |
1159 | stmmac_exit_fs(); | |
1160 | #endif | |
a630844d | 1161 | clk_disable_unprepare(priv->stmmac_clk); |
bfab27a1 | 1162 | |
47dd7a54 GC |
1163 | return 0; |
1164 | } | |
1165 | ||
47dd7a54 GC |
1166 | /** |
1167 | * stmmac_xmit: | |
1168 | * @skb : the socket buffer | |
1169 | * @dev : device pointer | |
1170 | * Description : Tx entry point of the driver. | |
1171 | */ | |
1172 | static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) | |
1173 | { | |
1174 | struct stmmac_priv *priv = netdev_priv(dev); | |
1175 | unsigned int txsize = priv->dma_tx_size; | |
1176 | unsigned int entry; | |
1177 | int i, csum_insertion = 0; | |
1178 | int nfrags = skb_shinfo(skb)->nr_frags; | |
1179 | struct dma_desc *desc, *first; | |
286a8372 | 1180 | unsigned int nopaged_len = skb_headlen(skb); |
47dd7a54 GC |
1181 | |
1182 | if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) { | |
1183 | if (!netif_queue_stopped(dev)) { | |
1184 | netif_stop_queue(dev); | |
1185 | /* This is a hard error, log it. */ | |
1186 | pr_err("%s: BUG! Tx Ring full when queue awake\n", | |
1187 | __func__); | |
1188 | } | |
1189 | return NETDEV_TX_BUSY; | |
1190 | } | |
1191 | ||
a9097a96 GC |
1192 | spin_lock(&priv->tx_lock); |
1193 | ||
d765955d GC |
1194 | if (priv->tx_path_in_lpi_mode) |
1195 | stmmac_disable_eee_mode(priv); | |
1196 | ||
47dd7a54 GC |
1197 | entry = priv->cur_tx % txsize; |
1198 | ||
1199 | #ifdef STMMAC_XMIT_DEBUG | |
1200 | if ((skb->len > ETH_FRAME_LEN) || nfrags) | |
1201 | pr_info("stmmac xmit:\n" | |
1202 | "\tskb addr %p - len: %d - nopaged_len: %d\n" | |
1203 | "\tn_frags: %d - ip_summed: %d - %s gso\n", | |
286a8372 | 1204 | skb, skb->len, nopaged_len, nfrags, skb->ip_summed, |
47dd7a54 GC |
1205 | !skb_is_gso(skb) ? "isn't" : "is"); |
1206 | #endif | |
1207 | ||
5e982f3b | 1208 | csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); |
47dd7a54 GC |
1209 | |
1210 | desc = priv->dma_tx + entry; | |
1211 | first = desc; | |
1212 | ||
1213 | #ifdef STMMAC_XMIT_DEBUG | |
1214 | if ((nfrags > 0) || (skb->len > ETH_FRAME_LEN)) | |
1215 | pr_debug("stmmac xmit: skb len: %d, nopaged_len: %d,\n" | |
1216 | "\t\tn_frags: %d, ip_summed: %d\n", | |
286a8372 | 1217 | skb->len, nopaged_len, nfrags, skb->ip_summed); |
47dd7a54 GC |
1218 | #endif |
1219 | priv->tx_skbuff[entry] = skb; | |
286a8372 GC |
1220 | |
1221 | if (priv->hw->ring->is_jumbo_frm(skb->len, priv->plat->enh_desc)) { | |
1222 | entry = priv->hw->ring->jumbo_frm(priv, skb, csum_insertion); | |
47dd7a54 GC |
1223 | desc = priv->dma_tx + entry; |
1224 | } else { | |
47dd7a54 GC |
1225 | desc->des2 = dma_map_single(priv->device, skb->data, |
1226 | nopaged_len, DMA_TO_DEVICE); | |
db98a0b0 GC |
1227 | priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, |
1228 | csum_insertion); | |
47dd7a54 GC |
1229 | } |
1230 | ||
1231 | for (i = 0; i < nfrags; i++) { | |
9e903e08 ED |
1232 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
1233 | int len = skb_frag_size(frag); | |
47dd7a54 GC |
1234 | |
1235 | entry = (++priv->cur_tx) % txsize; | |
1236 | desc = priv->dma_tx + entry; | |
1237 | ||
1238 | TX_DBG("\t[entry %d] segment len: %d\n", entry, len); | |
f722380d IC |
1239 | desc->des2 = skb_frag_dma_map(priv->device, frag, 0, len, |
1240 | DMA_TO_DEVICE); | |
47dd7a54 | 1241 | priv->tx_skbuff[entry] = NULL; |
db98a0b0 | 1242 | priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion); |
eb0dc4bb | 1243 | wmb(); |
db98a0b0 | 1244 | priv->hw->desc->set_tx_owner(desc); |
8e839891 | 1245 | wmb(); |
47dd7a54 GC |
1246 | } |
1247 | ||
1248 | /* Interrupt on completition only for the latest segment */ | |
db98a0b0 | 1249 | priv->hw->desc->close_tx_desc(desc); |
73cfe264 | 1250 | |
eb0dc4bb SH |
1251 | wmb(); |
1252 | ||
47dd7a54 | 1253 | /* To avoid raise condition */ |
db98a0b0 | 1254 | priv->hw->desc->set_tx_owner(first); |
8e839891 | 1255 | wmb(); |
47dd7a54 GC |
1256 | |
1257 | priv->cur_tx++; | |
1258 | ||
1259 | #ifdef STMMAC_XMIT_DEBUG | |
1260 | if (netif_msg_pktdata(priv)) { | |
1261 | pr_info("stmmac xmit: current=%d, dirty=%d, entry=%d, " | |
1262 | "first=%p, nfrags=%d\n", | |
1263 | (priv->cur_tx % txsize), (priv->dirty_tx % txsize), | |
1264 | entry, first, nfrags); | |
1265 | display_ring(priv->dma_tx, txsize); | |
1266 | pr_info(">>> frame to be transmitted: "); | |
1267 | print_pkt(skb->data, skb->len); | |
1268 | } | |
1269 | #endif | |
1270 | if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) { | |
1271 | TX_DBG("%s: stop transmitted packets\n", __func__); | |
1272 | netif_stop_queue(dev); | |
1273 | } | |
1274 | ||
1275 | dev->stats.tx_bytes += skb->len; | |
1276 | ||
3e82ce12 RC |
1277 | skb_tx_timestamp(skb); |
1278 | ||
52f64fae RC |
1279 | priv->hw->dma->enable_dma_transmission(priv->ioaddr); |
1280 | ||
a9097a96 GC |
1281 | spin_unlock(&priv->tx_lock); |
1282 | ||
47dd7a54 GC |
1283 | return NETDEV_TX_OK; |
1284 | } | |
1285 | ||
1286 | static inline void stmmac_rx_refill(struct stmmac_priv *priv) | |
1287 | { | |
1288 | unsigned int rxsize = priv->dma_rx_size; | |
1289 | int bfsize = priv->dma_buf_sz; | |
1290 | struct dma_desc *p = priv->dma_rx; | |
1291 | ||
1292 | for (; priv->cur_rx - priv->dirty_rx > 0; priv->dirty_rx++) { | |
1293 | unsigned int entry = priv->dirty_rx % rxsize; | |
1294 | if (likely(priv->rx_skbuff[entry] == NULL)) { | |
1295 | struct sk_buff *skb; | |
1296 | ||
acb600de | 1297 | skb = netdev_alloc_skb_ip_align(priv->dev, bfsize); |
47dd7a54 GC |
1298 | |
1299 | if (unlikely(skb == NULL)) | |
1300 | break; | |
1301 | ||
1302 | priv->rx_skbuff[entry] = skb; | |
1303 | priv->rx_skbuff_dma[entry] = | |
1304 | dma_map_single(priv->device, skb->data, bfsize, | |
1305 | DMA_FROM_DEVICE); | |
1306 | ||
1307 | (p + entry)->des2 = priv->rx_skbuff_dma[entry]; | |
286a8372 GC |
1308 | |
1309 | if (unlikely(priv->plat->has_gmac)) | |
1310 | priv->hw->ring->refill_desc3(bfsize, p + entry); | |
1311 | ||
47dd7a54 GC |
1312 | RX_DBG(KERN_INFO "\trefill entry #%d\n", entry); |
1313 | } | |
eb0dc4bb | 1314 | wmb(); |
db98a0b0 | 1315 | priv->hw->desc->set_rx_owner(p + entry); |
8e839891 | 1316 | wmb(); |
47dd7a54 | 1317 | } |
47dd7a54 GC |
1318 | } |
1319 | ||
1320 | static int stmmac_rx(struct stmmac_priv *priv, int limit) | |
1321 | { | |
1322 | unsigned int rxsize = priv->dma_rx_size; | |
1323 | unsigned int entry = priv->cur_rx % rxsize; | |
1324 | unsigned int next_entry; | |
1325 | unsigned int count = 0; | |
1326 | struct dma_desc *p = priv->dma_rx + entry; | |
1327 | struct dma_desc *p_next; | |
1328 | ||
1329 | #ifdef STMMAC_RX_DEBUG | |
1330 | if (netif_msg_hw(priv)) { | |
1331 | pr_debug(">>> stmmac_rx: descriptor ring:\n"); | |
1332 | display_ring(priv->dma_rx, rxsize); | |
1333 | } | |
1334 | #endif | |
db98a0b0 | 1335 | while (!priv->hw->desc->get_rx_owner(p)) { |
47dd7a54 GC |
1336 | int status; |
1337 | ||
1338 | if (count >= limit) | |
1339 | break; | |
1340 | ||
1341 | count++; | |
1342 | ||
1343 | next_entry = (++priv->cur_rx) % rxsize; | |
1344 | p_next = priv->dma_rx + next_entry; | |
1345 | prefetch(p_next); | |
1346 | ||
1347 | /* read the status of the incoming frame */ | |
db98a0b0 GC |
1348 | status = (priv->hw->desc->rx_status(&priv->dev->stats, |
1349 | &priv->xstats, p)); | |
47dd7a54 GC |
1350 | if (unlikely(status == discard_frame)) |
1351 | priv->dev->stats.rx_errors++; | |
1352 | else { | |
1353 | struct sk_buff *skb; | |
3eeb2997 | 1354 | int frame_len; |
47dd7a54 | 1355 | |
38912bdb DS |
1356 | frame_len = priv->hw->desc->get_rx_frame_len(p, |
1357 | priv->plat->rx_coe); | |
3eeb2997 GC |
1358 | /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3 |
1359 | * Type frames (LLC/LLC-SNAP) */ | |
1360 | if (unlikely(status != llc_snap)) | |
1361 | frame_len -= ETH_FCS_LEN; | |
47dd7a54 GC |
1362 | #ifdef STMMAC_RX_DEBUG |
1363 | if (frame_len > ETH_FRAME_LEN) | |
1364 | pr_debug("\tRX frame size %d, COE status: %d\n", | |
1365 | frame_len, status); | |
1366 | ||
1367 | if (netif_msg_hw(priv)) | |
1368 | pr_debug("\tdesc: %p [entry %d] buff=0x%x\n", | |
1369 | p, entry, p->des2); | |
1370 | #endif | |
1371 | skb = priv->rx_skbuff[entry]; | |
1372 | if (unlikely(!skb)) { | |
1373 | pr_err("%s: Inconsistent Rx descriptor chain\n", | |
1374 | priv->dev->name); | |
1375 | priv->dev->stats.rx_dropped++; | |
1376 | break; | |
1377 | } | |
1378 | prefetch(skb->data - NET_IP_ALIGN); | |
1379 | priv->rx_skbuff[entry] = NULL; | |
1380 | ||
1381 | skb_put(skb, frame_len); | |
1382 | dma_unmap_single(priv->device, | |
1383 | priv->rx_skbuff_dma[entry], | |
1384 | priv->dma_buf_sz, DMA_FROM_DEVICE); | |
1385 | #ifdef STMMAC_RX_DEBUG | |
1386 | if (netif_msg_pktdata(priv)) { | |
1387 | pr_info(" frame received (%dbytes)", frame_len); | |
1388 | print_pkt(skb->data, frame_len); | |
1389 | } | |
1390 | #endif | |
1391 | skb->protocol = eth_type_trans(skb, priv->dev); | |
1392 | ||
38912bdb | 1393 | if (unlikely(!priv->plat->rx_coe)) { |
3c20f72f | 1394 | /* No RX COE for old mac10/100 devices */ |
bc8acf2c | 1395 | skb_checksum_none_assert(skb); |
47dd7a54 GC |
1396 | netif_receive_skb(skb); |
1397 | } else { | |
1398 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1399 | napi_gro_receive(&priv->napi, skb); | |
1400 | } | |
1401 | ||
1402 | priv->dev->stats.rx_packets++; | |
1403 | priv->dev->stats.rx_bytes += frame_len; | |
47dd7a54 GC |
1404 | } |
1405 | entry = next_entry; | |
1406 | p = p_next; /* use prefetched values */ | |
1407 | } | |
1408 | ||
1409 | stmmac_rx_refill(priv); | |
1410 | ||
1411 | priv->xstats.rx_pkt_n += count; | |
1412 | ||
1413 | return count; | |
1414 | } | |
1415 | ||
1416 | /** | |
1417 | * stmmac_poll - stmmac poll method (NAPI) | |
1418 | * @napi : pointer to the napi structure. | |
1419 | * @budget : maximum number of packets that the current CPU can receive from | |
1420 | * all interfaces. | |
1421 | * Description : | |
1422 | * This function implements the the reception process. | |
1423 | * Also it runs the TX completion thread | |
1424 | */ | |
1425 | static int stmmac_poll(struct napi_struct *napi, int budget) | |
1426 | { | |
1427 | struct stmmac_priv *priv = container_of(napi, struct stmmac_priv, napi); | |
1428 | int work_done = 0; | |
1429 | ||
1430 | priv->xstats.poll_n++; | |
1431 | stmmac_tx(priv); | |
1432 | work_done = stmmac_rx(priv, budget); | |
1433 | ||
1434 | if (work_done < budget) { | |
1435 | napi_complete(napi); | |
1436 | stmmac_enable_irq(priv); | |
1437 | } | |
1438 | return work_done; | |
1439 | } | |
1440 | ||
1441 | /** | |
1442 | * stmmac_tx_timeout | |
1443 | * @dev : Pointer to net device structure | |
1444 | * Description: this function is called when a packet transmission fails to | |
7284a3f1 | 1445 | * complete within a reasonable time. The driver will mark the error in the |
47dd7a54 GC |
1446 | * netdev structure and arrange for the device to be reset to a sane state |
1447 | * in order to transmit a new packet. | |
1448 | */ | |
1449 | static void stmmac_tx_timeout(struct net_device *dev) | |
1450 | { | |
1451 | struct stmmac_priv *priv = netdev_priv(dev); | |
1452 | ||
1453 | /* Clear Tx resources and restart transmitting again */ | |
1454 | stmmac_tx_err(priv); | |
47dd7a54 GC |
1455 | } |
1456 | ||
1457 | /* Configuration changes (passed on by ifconfig) */ | |
1458 | static int stmmac_config(struct net_device *dev, struct ifmap *map) | |
1459 | { | |
1460 | if (dev->flags & IFF_UP) /* can't act on a running interface */ | |
1461 | return -EBUSY; | |
1462 | ||
1463 | /* Don't allow changing the I/O address */ | |
1464 | if (map->base_addr != dev->base_addr) { | |
1465 | pr_warning("%s: can't change I/O address\n", dev->name); | |
1466 | return -EOPNOTSUPP; | |
1467 | } | |
1468 | ||
1469 | /* Don't allow changing the IRQ */ | |
1470 | if (map->irq != dev->irq) { | |
1471 | pr_warning("%s: can't change IRQ number %d\n", | |
1472 | dev->name, dev->irq); | |
1473 | return -EOPNOTSUPP; | |
1474 | } | |
1475 | ||
1476 | /* ignore other fields */ | |
1477 | return 0; | |
1478 | } | |
1479 | ||
1480 | /** | |
01789349 | 1481 | * stmmac_set_rx_mode - entry point for multicast addressing |
47dd7a54 GC |
1482 | * @dev : pointer to the device structure |
1483 | * Description: | |
1484 | * This function is a driver entry point which gets called by the kernel | |
1485 | * whenever multicast addresses must be enabled/disabled. | |
1486 | * Return value: | |
1487 | * void. | |
1488 | */ | |
01789349 | 1489 | static void stmmac_set_rx_mode(struct net_device *dev) |
47dd7a54 GC |
1490 | { |
1491 | struct stmmac_priv *priv = netdev_priv(dev); | |
1492 | ||
1493 | spin_lock(&priv->lock); | |
cffb13f4 | 1494 | priv->hw->mac->set_filter(dev, priv->synopsys_id); |
47dd7a54 | 1495 | spin_unlock(&priv->lock); |
47dd7a54 GC |
1496 | } |
1497 | ||
1498 | /** | |
1499 | * stmmac_change_mtu - entry point to change MTU size for the device. | |
1500 | * @dev : device pointer. | |
1501 | * @new_mtu : the new MTU size for the device. | |
1502 | * Description: the Maximum Transfer Unit (MTU) is used by the network layer | |
1503 | * to drive packet transmission. Ethernet has an MTU of 1500 octets | |
1504 | * (ETH_DATA_LEN). This value can be changed with ifconfig. | |
1505 | * Return value: | |
1506 | * 0 on success and an appropriate (-)ve integer as defined in errno.h | |
1507 | * file on failure. | |
1508 | */ | |
1509 | static int stmmac_change_mtu(struct net_device *dev, int new_mtu) | |
1510 | { | |
1511 | struct stmmac_priv *priv = netdev_priv(dev); | |
1512 | int max_mtu; | |
1513 | ||
1514 | if (netif_running(dev)) { | |
1515 | pr_err("%s: must be stopped to change its MTU\n", dev->name); | |
1516 | return -EBUSY; | |
1517 | } | |
1518 | ||
48febf7e | 1519 | if (priv->plat->enh_desc) |
47dd7a54 GC |
1520 | max_mtu = JUMBO_LEN; |
1521 | else | |
45db81e1 | 1522 | max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); |
47dd7a54 GC |
1523 | |
1524 | if ((new_mtu < 46) || (new_mtu > max_mtu)) { | |
1525 | pr_err("%s: invalid MTU, max MTU is: %d\n", dev->name, max_mtu); | |
1526 | return -EINVAL; | |
1527 | } | |
1528 | ||
5e982f3b MM |
1529 | dev->mtu = new_mtu; |
1530 | netdev_update_features(dev); | |
1531 | ||
1532 | return 0; | |
1533 | } | |
1534 | ||
c8f44aff MM |
1535 | static netdev_features_t stmmac_fix_features(struct net_device *dev, |
1536 | netdev_features_t features) | |
5e982f3b MM |
1537 | { |
1538 | struct stmmac_priv *priv = netdev_priv(dev); | |
1539 | ||
38912bdb | 1540 | if (priv->plat->rx_coe == STMMAC_RX_COE_NONE) |
5e982f3b | 1541 | features &= ~NETIF_F_RXCSUM; |
38912bdb DS |
1542 | else if (priv->plat->rx_coe == STMMAC_RX_COE_TYPE1) |
1543 | features &= ~NETIF_F_IPV6_CSUM; | |
5e982f3b MM |
1544 | if (!priv->plat->tx_coe) |
1545 | features &= ~NETIF_F_ALL_CSUM; | |
1546 | ||
ebbb293f GC |
1547 | /* Some GMAC devices have a bugged Jumbo frame support that |
1548 | * needs to have the Tx COE disabled for oversized frames | |
1549 | * (due to limited buffer sizes). In this case we disable | |
1550 | * the TX csum insertionin the TDES and not use SF. */ | |
5e982f3b MM |
1551 | if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN)) |
1552 | features &= ~NETIF_F_ALL_CSUM; | |
ebbb293f | 1553 | |
5e982f3b | 1554 | return features; |
47dd7a54 GC |
1555 | } |
1556 | ||
1557 | static irqreturn_t stmmac_interrupt(int irq, void *dev_id) | |
1558 | { | |
1559 | struct net_device *dev = (struct net_device *)dev_id; | |
1560 | struct stmmac_priv *priv = netdev_priv(dev); | |
1561 | ||
1562 | if (unlikely(!dev)) { | |
1563 | pr_err("%s: invalid dev pointer\n", __func__); | |
1564 | return IRQ_NONE; | |
1565 | } | |
1566 | ||
d765955d GC |
1567 | /* To handle GMAC own interrupts */ |
1568 | if (priv->plat->has_gmac) { | |
1569 | int status = priv->hw->mac->host_irq_status((void __iomem *) | |
1570 | dev->base_addr); | |
1571 | if (unlikely(status)) { | |
1572 | if (status & core_mmc_tx_irq) | |
1573 | priv->xstats.mmc_tx_irq_n++; | |
1574 | if (status & core_mmc_rx_irq) | |
1575 | priv->xstats.mmc_rx_irq_n++; | |
1576 | if (status & core_mmc_rx_csum_offload_irq) | |
1577 | priv->xstats.mmc_rx_csum_offload_irq_n++; | |
1578 | if (status & core_irq_receive_pmt_irq) | |
1579 | priv->xstats.irq_receive_pmt_irq_n++; | |
1580 | ||
1581 | /* For LPI we need to save the tx status */ | |
1582 | if (status & core_irq_tx_path_in_lpi_mode) { | |
1583 | priv->xstats.irq_tx_path_in_lpi_mode_n++; | |
1584 | priv->tx_path_in_lpi_mode = true; | |
1585 | } | |
1586 | if (status & core_irq_tx_path_exit_lpi_mode) { | |
1587 | priv->xstats.irq_tx_path_exit_lpi_mode_n++; | |
1588 | priv->tx_path_in_lpi_mode = false; | |
1589 | } | |
1590 | if (status & core_irq_rx_path_in_lpi_mode) | |
1591 | priv->xstats.irq_rx_path_in_lpi_mode_n++; | |
1592 | if (status & core_irq_rx_path_exit_lpi_mode) | |
1593 | priv->xstats.irq_rx_path_exit_lpi_mode_n++; | |
1594 | } | |
1595 | } | |
aec7ff27 | 1596 | |
d765955d | 1597 | /* To handle DMA interrupts */ |
aec7ff27 | 1598 | stmmac_dma_interrupt(priv); |
47dd7a54 GC |
1599 | |
1600 | return IRQ_HANDLED; | |
1601 | } | |
1602 | ||
1603 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1604 | /* Polling receive - used by NETCONSOLE and other diagnostic tools | |
1605 | * to allow network I/O with interrupts disabled. */ | |
1606 | static void stmmac_poll_controller(struct net_device *dev) | |
1607 | { | |
1608 | disable_irq(dev->irq); | |
1609 | stmmac_interrupt(dev->irq, dev); | |
1610 | enable_irq(dev->irq); | |
1611 | } | |
1612 | #endif | |
1613 | ||
1614 | /** | |
1615 | * stmmac_ioctl - Entry point for the Ioctl | |
1616 | * @dev: Device pointer. | |
1617 | * @rq: An IOCTL specefic structure, that can contain a pointer to | |
1618 | * a proprietary structure used to pass information to the driver. | |
1619 | * @cmd: IOCTL command | |
1620 | * Description: | |
1621 | * Currently there are no special functionality supported in IOCTL, just the | |
1622 | * phy_mii_ioctl(...) can be invoked. | |
1623 | */ | |
1624 | static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1625 | { | |
1626 | struct stmmac_priv *priv = netdev_priv(dev); | |
28b04113 | 1627 | int ret; |
47dd7a54 GC |
1628 | |
1629 | if (!netif_running(dev)) | |
1630 | return -EINVAL; | |
1631 | ||
28b04113 RC |
1632 | if (!priv->phydev) |
1633 | return -EINVAL; | |
1634 | ||
28b04113 | 1635 | ret = phy_mii_ioctl(priv->phydev, rq, cmd); |
28b04113 | 1636 | |
47dd7a54 GC |
1637 | return ret; |
1638 | } | |
1639 | ||
7ac29055 GC |
1640 | #ifdef CONFIG_STMMAC_DEBUG_FS |
1641 | static struct dentry *stmmac_fs_dir; | |
1642 | static struct dentry *stmmac_rings_status; | |
e7434821 | 1643 | static struct dentry *stmmac_dma_cap; |
7ac29055 GC |
1644 | |
1645 | static int stmmac_sysfs_ring_read(struct seq_file *seq, void *v) | |
1646 | { | |
1647 | struct tmp_s { | |
1648 | u64 a; | |
1649 | unsigned int b; | |
1650 | unsigned int c; | |
1651 | }; | |
1652 | int i; | |
1653 | struct net_device *dev = seq->private; | |
1654 | struct stmmac_priv *priv = netdev_priv(dev); | |
1655 | ||
1656 | seq_printf(seq, "=======================\n"); | |
1657 | seq_printf(seq, " RX descriptor ring\n"); | |
1658 | seq_printf(seq, "=======================\n"); | |
1659 | ||
1660 | for (i = 0; i < priv->dma_rx_size; i++) { | |
1661 | struct tmp_s *x = (struct tmp_s *)(priv->dma_rx + i); | |
1662 | seq_printf(seq, "[%d] DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", | |
1663 | i, (unsigned int)(x->a), | |
1664 | (unsigned int)((x->a) >> 32), x->b, x->c); | |
1665 | seq_printf(seq, "\n"); | |
1666 | } | |
1667 | ||
1668 | seq_printf(seq, "\n"); | |
1669 | seq_printf(seq, "=======================\n"); | |
1670 | seq_printf(seq, " TX descriptor ring\n"); | |
1671 | seq_printf(seq, "=======================\n"); | |
1672 | ||
1673 | for (i = 0; i < priv->dma_tx_size; i++) { | |
1674 | struct tmp_s *x = (struct tmp_s *)(priv->dma_tx + i); | |
1675 | seq_printf(seq, "[%d] DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", | |
1676 | i, (unsigned int)(x->a), | |
1677 | (unsigned int)((x->a) >> 32), x->b, x->c); | |
1678 | seq_printf(seq, "\n"); | |
1679 | } | |
1680 | ||
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | static int stmmac_sysfs_ring_open(struct inode *inode, struct file *file) | |
1685 | { | |
1686 | return single_open(file, stmmac_sysfs_ring_read, inode->i_private); | |
1687 | } | |
1688 | ||
1689 | static const struct file_operations stmmac_rings_status_fops = { | |
1690 | .owner = THIS_MODULE, | |
1691 | .open = stmmac_sysfs_ring_open, | |
1692 | .read = seq_read, | |
1693 | .llseek = seq_lseek, | |
74863948 | 1694 | .release = single_release, |
7ac29055 GC |
1695 | }; |
1696 | ||
e7434821 GC |
1697 | static int stmmac_sysfs_dma_cap_read(struct seq_file *seq, void *v) |
1698 | { | |
1699 | struct net_device *dev = seq->private; | |
1700 | struct stmmac_priv *priv = netdev_priv(dev); | |
1701 | ||
19e30c14 | 1702 | if (!priv->hw_cap_support) { |
e7434821 GC |
1703 | seq_printf(seq, "DMA HW features not supported\n"); |
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | seq_printf(seq, "==============================\n"); | |
1708 | seq_printf(seq, "\tDMA HW features\n"); | |
1709 | seq_printf(seq, "==============================\n"); | |
1710 | ||
1711 | seq_printf(seq, "\t10/100 Mbps %s\n", | |
1712 | (priv->dma_cap.mbps_10_100) ? "Y" : "N"); | |
1713 | seq_printf(seq, "\t1000 Mbps %s\n", | |
1714 | (priv->dma_cap.mbps_1000) ? "Y" : "N"); | |
1715 | seq_printf(seq, "\tHalf duple %s\n", | |
1716 | (priv->dma_cap.half_duplex) ? "Y" : "N"); | |
1717 | seq_printf(seq, "\tHash Filter: %s\n", | |
1718 | (priv->dma_cap.hash_filter) ? "Y" : "N"); | |
1719 | seq_printf(seq, "\tMultiple MAC address registers: %s\n", | |
1720 | (priv->dma_cap.multi_addr) ? "Y" : "N"); | |
1721 | seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfatces): %s\n", | |
1722 | (priv->dma_cap.pcs) ? "Y" : "N"); | |
1723 | seq_printf(seq, "\tSMA (MDIO) Interface: %s\n", | |
1724 | (priv->dma_cap.sma_mdio) ? "Y" : "N"); | |
1725 | seq_printf(seq, "\tPMT Remote wake up: %s\n", | |
1726 | (priv->dma_cap.pmt_remote_wake_up) ? "Y" : "N"); | |
1727 | seq_printf(seq, "\tPMT Magic Frame: %s\n", | |
1728 | (priv->dma_cap.pmt_magic_frame) ? "Y" : "N"); | |
1729 | seq_printf(seq, "\tRMON module: %s\n", | |
1730 | (priv->dma_cap.rmon) ? "Y" : "N"); | |
1731 | seq_printf(seq, "\tIEEE 1588-2002 Time Stamp: %s\n", | |
1732 | (priv->dma_cap.time_stamp) ? "Y" : "N"); | |
1733 | seq_printf(seq, "\tIEEE 1588-2008 Advanced Time Stamp:%s\n", | |
1734 | (priv->dma_cap.atime_stamp) ? "Y" : "N"); | |
1735 | seq_printf(seq, "\t802.3az - Energy-Efficient Ethernet (EEE) %s\n", | |
1736 | (priv->dma_cap.eee) ? "Y" : "N"); | |
1737 | seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N"); | |
1738 | seq_printf(seq, "\tChecksum Offload in TX: %s\n", | |
1739 | (priv->dma_cap.tx_coe) ? "Y" : "N"); | |
1740 | seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n", | |
1741 | (priv->dma_cap.rx_coe_type1) ? "Y" : "N"); | |
1742 | seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n", | |
1743 | (priv->dma_cap.rx_coe_type2) ? "Y" : "N"); | |
1744 | seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n", | |
1745 | (priv->dma_cap.rxfifo_over_2048) ? "Y" : "N"); | |
1746 | seq_printf(seq, "\tNumber of Additional RX channel: %d\n", | |
1747 | priv->dma_cap.number_rx_channel); | |
1748 | seq_printf(seq, "\tNumber of Additional TX channel: %d\n", | |
1749 | priv->dma_cap.number_tx_channel); | |
1750 | seq_printf(seq, "\tEnhanced descriptors: %s\n", | |
1751 | (priv->dma_cap.enh_desc) ? "Y" : "N"); | |
1752 | ||
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | static int stmmac_sysfs_dma_cap_open(struct inode *inode, struct file *file) | |
1757 | { | |
1758 | return single_open(file, stmmac_sysfs_dma_cap_read, inode->i_private); | |
1759 | } | |
1760 | ||
1761 | static const struct file_operations stmmac_dma_cap_fops = { | |
1762 | .owner = THIS_MODULE, | |
1763 | .open = stmmac_sysfs_dma_cap_open, | |
1764 | .read = seq_read, | |
1765 | .llseek = seq_lseek, | |
74863948 | 1766 | .release = single_release, |
e7434821 GC |
1767 | }; |
1768 | ||
7ac29055 GC |
1769 | static int stmmac_init_fs(struct net_device *dev) |
1770 | { | |
1771 | /* Create debugfs entries */ | |
1772 | stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL); | |
1773 | ||
1774 | if (!stmmac_fs_dir || IS_ERR(stmmac_fs_dir)) { | |
1775 | pr_err("ERROR %s, debugfs create directory failed\n", | |
1776 | STMMAC_RESOURCE_NAME); | |
1777 | ||
1778 | return -ENOMEM; | |
1779 | } | |
1780 | ||
1781 | /* Entry to report DMA RX/TX rings */ | |
1782 | stmmac_rings_status = debugfs_create_file("descriptors_status", | |
1783 | S_IRUGO, stmmac_fs_dir, dev, | |
1784 | &stmmac_rings_status_fops); | |
1785 | ||
1786 | if (!stmmac_rings_status || IS_ERR(stmmac_rings_status)) { | |
1787 | pr_info("ERROR creating stmmac ring debugfs file\n"); | |
1788 | debugfs_remove(stmmac_fs_dir); | |
1789 | ||
1790 | return -ENOMEM; | |
1791 | } | |
1792 | ||
e7434821 GC |
1793 | /* Entry to report the DMA HW features */ |
1794 | stmmac_dma_cap = debugfs_create_file("dma_cap", S_IRUGO, stmmac_fs_dir, | |
1795 | dev, &stmmac_dma_cap_fops); | |
1796 | ||
1797 | if (!stmmac_dma_cap || IS_ERR(stmmac_dma_cap)) { | |
1798 | pr_info("ERROR creating stmmac MMC debugfs file\n"); | |
1799 | debugfs_remove(stmmac_rings_status); | |
1800 | debugfs_remove(stmmac_fs_dir); | |
1801 | ||
1802 | return -ENOMEM; | |
1803 | } | |
1804 | ||
7ac29055 GC |
1805 | return 0; |
1806 | } | |
1807 | ||
1808 | static void stmmac_exit_fs(void) | |
1809 | { | |
1810 | debugfs_remove(stmmac_rings_status); | |
e7434821 | 1811 | debugfs_remove(stmmac_dma_cap); |
7ac29055 GC |
1812 | debugfs_remove(stmmac_fs_dir); |
1813 | } | |
1814 | #endif /* CONFIG_STMMAC_DEBUG_FS */ | |
1815 | ||
47dd7a54 GC |
1816 | static const struct net_device_ops stmmac_netdev_ops = { |
1817 | .ndo_open = stmmac_open, | |
1818 | .ndo_start_xmit = stmmac_xmit, | |
1819 | .ndo_stop = stmmac_release, | |
1820 | .ndo_change_mtu = stmmac_change_mtu, | |
5e982f3b | 1821 | .ndo_fix_features = stmmac_fix_features, |
01789349 | 1822 | .ndo_set_rx_mode = stmmac_set_rx_mode, |
47dd7a54 GC |
1823 | .ndo_tx_timeout = stmmac_tx_timeout, |
1824 | .ndo_do_ioctl = stmmac_ioctl, | |
1825 | .ndo_set_config = stmmac_config, | |
47dd7a54 GC |
1826 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1827 | .ndo_poll_controller = stmmac_poll_controller, | |
1828 | #endif | |
1829 | .ndo_set_mac_address = eth_mac_addr, | |
1830 | }; | |
1831 | ||
cf3f047b GC |
1832 | /** |
1833 | * stmmac_hw_init - Init the MAC device | |
1834 | * @priv : pointer to the private device structure. | |
1835 | * Description: this function detects which MAC device | |
1836 | * (GMAC/MAC10-100) has to attached, checks the HW capability | |
1837 | * (if supported) and sets the driver's features (for example | |
1838 | * to use the ring or chaine mode or support the normal/enh | |
1839 | * descriptor structure). | |
1840 | */ | |
1841 | static int stmmac_hw_init(struct stmmac_priv *priv) | |
1842 | { | |
1843 | int ret = 0; | |
1844 | struct mac_device_info *mac; | |
1845 | ||
1846 | /* Identify the MAC HW device */ | |
03f2eecd MKB |
1847 | if (priv->plat->has_gmac) { |
1848 | priv->dev->priv_flags |= IFF_UNICAST_FLT; | |
cf3f047b | 1849 | mac = dwmac1000_setup(priv->ioaddr); |
03f2eecd | 1850 | } else { |
cf3f047b | 1851 | mac = dwmac100_setup(priv->ioaddr); |
03f2eecd | 1852 | } |
cf3f047b GC |
1853 | if (!mac) |
1854 | return -ENOMEM; | |
1855 | ||
1856 | priv->hw = mac; | |
1857 | ||
1858 | /* To use the chained or ring mode */ | |
1859 | priv->hw->ring = &ring_mode_ops; | |
1860 | ||
1861 | /* Get and dump the chip ID */ | |
cffb13f4 | 1862 | priv->synopsys_id = stmmac_get_synopsys_id(priv); |
cf3f047b GC |
1863 | |
1864 | /* Get the HW capability (new GMAC newer than 3.50a) */ | |
1865 | priv->hw_cap_support = stmmac_get_hw_features(priv); | |
1866 | if (priv->hw_cap_support) { | |
1867 | pr_info(" DMA HW capability register supported"); | |
1868 | ||
1869 | /* We can override some gmac/dma configuration fields: e.g. | |
1870 | * enh_desc, tx_coe (e.g. that are passed through the | |
1871 | * platform) with the values from the HW capability | |
1872 | * register (if supported). | |
1873 | */ | |
1874 | priv->plat->enh_desc = priv->dma_cap.enh_desc; | |
cf3f047b | 1875 | priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up; |
38912bdb DS |
1876 | |
1877 | priv->plat->tx_coe = priv->dma_cap.tx_coe; | |
1878 | ||
1879 | if (priv->dma_cap.rx_coe_type2) | |
1880 | priv->plat->rx_coe = STMMAC_RX_COE_TYPE2; | |
1881 | else if (priv->dma_cap.rx_coe_type1) | |
1882 | priv->plat->rx_coe = STMMAC_RX_COE_TYPE1; | |
1883 | ||
cf3f047b GC |
1884 | } else |
1885 | pr_info(" No HW DMA feature register supported"); | |
1886 | ||
1887 | /* Select the enhnaced/normal descriptor structures */ | |
1888 | stmmac_selec_desc_mode(priv); | |
1889 | ||
38912bdb DS |
1890 | /* Enable the IPC (Checksum Offload) and check if the feature has been |
1891 | * enabled during the core configuration. */ | |
1892 | ret = priv->hw->mac->rx_ipc(priv->ioaddr); | |
1893 | if (!ret) { | |
1894 | pr_warning(" RX IPC Checksum Offload not configured.\n"); | |
1895 | priv->plat->rx_coe = STMMAC_RX_COE_NONE; | |
1896 | } | |
1897 | ||
1898 | if (priv->plat->rx_coe) | |
1899 | pr_info(" RX Checksum Offload Engine supported (type %d)\n", | |
1900 | priv->plat->rx_coe); | |
cf3f047b GC |
1901 | if (priv->plat->tx_coe) |
1902 | pr_info(" TX Checksum insertion supported\n"); | |
1903 | ||
1904 | if (priv->plat->pmt) { | |
1905 | pr_info(" Wake-Up On Lan supported\n"); | |
1906 | device_set_wakeup_capable(priv->device, 1); | |
1907 | } | |
1908 | ||
1909 | return ret; | |
1910 | } | |
1911 | ||
47dd7a54 | 1912 | /** |
bfab27a1 GC |
1913 | * stmmac_dvr_probe |
1914 | * @device: device pointer | |
ff3dd78c GC |
1915 | * @plat_dat: platform data pointer |
1916 | * @addr: iobase memory address | |
bfab27a1 GC |
1917 | * Description: this is the main probe function used to |
1918 | * call the alloc_etherdev, allocate the priv structure. | |
47dd7a54 | 1919 | */ |
bfab27a1 | 1920 | struct stmmac_priv *stmmac_dvr_probe(struct device *device, |
cf3f047b GC |
1921 | struct plat_stmmacenet_data *plat_dat, |
1922 | void __iomem *addr) | |
47dd7a54 GC |
1923 | { |
1924 | int ret = 0; | |
bfab27a1 GC |
1925 | struct net_device *ndev = NULL; |
1926 | struct stmmac_priv *priv; | |
47dd7a54 | 1927 | |
bfab27a1 | 1928 | ndev = alloc_etherdev(sizeof(struct stmmac_priv)); |
41de8d4c | 1929 | if (!ndev) |
bfab27a1 | 1930 | return NULL; |
bfab27a1 GC |
1931 | |
1932 | SET_NETDEV_DEV(ndev, device); | |
1933 | ||
1934 | priv = netdev_priv(ndev); | |
1935 | priv->device = device; | |
1936 | priv->dev = ndev; | |
47dd7a54 | 1937 | |
bfab27a1 | 1938 | ether_setup(ndev); |
47dd7a54 | 1939 | |
bfab27a1 | 1940 | stmmac_set_ethtool_ops(ndev); |
cf3f047b GC |
1941 | priv->pause = pause; |
1942 | priv->plat = plat_dat; | |
1943 | priv->ioaddr = addr; | |
1944 | priv->dev->base_addr = (unsigned long)addr; | |
1945 | ||
1946 | /* Verify driver arguments */ | |
1947 | stmmac_verify_args(); | |
bfab27a1 | 1948 | |
cf3f047b GC |
1949 | /* Override with kernel parameters if supplied XXX CRS XXX |
1950 | * this needs to have multiple instances */ | |
1951 | if ((phyaddr >= 0) && (phyaddr <= 31)) | |
1952 | priv->plat->phy_addr = phyaddr; | |
1953 | ||
1954 | /* Init MAC and get the capabilities */ | |
1955 | stmmac_hw_init(priv); | |
1956 | ||
1957 | ndev->netdev_ops = &stmmac_netdev_ops; | |
bfab27a1 | 1958 | |
cf3f047b GC |
1959 | ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
1960 | NETIF_F_RXCSUM; | |
bfab27a1 GC |
1961 | ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; |
1962 | ndev->watchdog_timeo = msecs_to_jiffies(watchdog); | |
47dd7a54 GC |
1963 | #ifdef STMMAC_VLAN_TAG_USED |
1964 | /* Both mac100 and gmac support receive VLAN tag detection */ | |
bfab27a1 | 1965 | ndev->features |= NETIF_F_HW_VLAN_RX; |
47dd7a54 GC |
1966 | #endif |
1967 | priv->msg_enable = netif_msg_init(debug, default_msg_level); | |
1968 | ||
47dd7a54 GC |
1969 | if (flow_ctrl) |
1970 | priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ | |
1971 | ||
bfab27a1 | 1972 | netif_napi_add(ndev, &priv->napi, stmmac_poll, 64); |
47dd7a54 | 1973 | |
f8e96161 | 1974 | spin_lock_init(&priv->lock); |
a9097a96 | 1975 | spin_lock_init(&priv->tx_lock); |
f8e96161 | 1976 | |
bfab27a1 | 1977 | ret = register_netdev(ndev); |
47dd7a54 | 1978 | if (ret) { |
cf3f047b | 1979 | pr_err("%s: ERROR %i registering the device\n", __func__, ret); |
6a81c26f | 1980 | goto error_netdev_register; |
47dd7a54 GC |
1981 | } |
1982 | ||
ae4d8cf2 | 1983 | priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME); |
6a81c26f | 1984 | if (IS_ERR(priv->stmmac_clk)) { |
31ea38ee | 1985 | pr_warning("%s: warning: cannot get CSR clock\n", __func__); |
6a81c26f VK |
1986 | goto error_clk_get; |
1987 | } | |
ba1377ff | 1988 | |
cd7201f4 GC |
1989 | /* If a specific clk_csr value is passed from the platform |
1990 | * this means that the CSR Clock Range selection cannot be | |
1991 | * changed at run-time and it is fixed. Viceversa the driver'll try to | |
1992 | * set the MDC clock dynamically according to the csr actual | |
1993 | * clock input. | |
1994 | */ | |
1995 | if (!priv->plat->clk_csr) | |
1996 | stmmac_clk_csr_set(priv); | |
1997 | else | |
1998 | priv->clk_csr = priv->plat->clk_csr; | |
1999 | ||
4bfcbd7a FV |
2000 | /* MDIO bus Registration */ |
2001 | ret = stmmac_mdio_register(ndev); | |
2002 | if (ret < 0) { | |
2003 | pr_debug("%s: MDIO bus (id: %d) registration failed", | |
2004 | __func__, priv->plat->bus_id); | |
6a81c26f | 2005 | goto error_mdio_register; |
4bfcbd7a FV |
2006 | } |
2007 | ||
bfab27a1 | 2008 | return priv; |
47dd7a54 | 2009 | |
6a81c26f VK |
2010 | error_mdio_register: |
2011 | clk_put(priv->stmmac_clk); | |
2012 | error_clk_get: | |
34a52f36 | 2013 | unregister_netdev(ndev); |
6a81c26f VK |
2014 | error_netdev_register: |
2015 | netif_napi_del(&priv->napi); | |
34a52f36 | 2016 | free_netdev(ndev); |
47dd7a54 | 2017 | |
bfab27a1 | 2018 | return NULL; |
47dd7a54 GC |
2019 | } |
2020 | ||
2021 | /** | |
2022 | * stmmac_dvr_remove | |
bfab27a1 | 2023 | * @ndev: net device pointer |
47dd7a54 | 2024 | * Description: this function resets the TX/RX processes, disables the MAC RX/TX |
bfab27a1 | 2025 | * changes the link status, releases the DMA descriptor rings. |
47dd7a54 | 2026 | */ |
bfab27a1 | 2027 | int stmmac_dvr_remove(struct net_device *ndev) |
47dd7a54 | 2028 | { |
aec7ff27 | 2029 | struct stmmac_priv *priv = netdev_priv(ndev); |
47dd7a54 GC |
2030 | |
2031 | pr_info("%s:\n\tremoving driver", __func__); | |
2032 | ||
ad01b7d4 GC |
2033 | priv->hw->dma->stop_rx(priv->ioaddr); |
2034 | priv->hw->dma->stop_tx(priv->ioaddr); | |
47dd7a54 | 2035 | |
bfab27a1 | 2036 | stmmac_set_mac(priv->ioaddr, false); |
4bfcbd7a | 2037 | stmmac_mdio_unregister(ndev); |
47dd7a54 | 2038 | netif_carrier_off(ndev); |
47dd7a54 | 2039 | unregister_netdev(ndev); |
47dd7a54 GC |
2040 | free_netdev(ndev); |
2041 | ||
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | #ifdef CONFIG_PM | |
bfab27a1 | 2046 | int stmmac_suspend(struct net_device *ndev) |
47dd7a54 | 2047 | { |
874bd42d | 2048 | struct stmmac_priv *priv = netdev_priv(ndev); |
47dd7a54 | 2049 | int dis_ic = 0; |
f8c5a875 | 2050 | unsigned long flags; |
47dd7a54 | 2051 | |
874bd42d | 2052 | if (!ndev || !netif_running(ndev)) |
47dd7a54 GC |
2053 | return 0; |
2054 | ||
102463b1 FV |
2055 | if (priv->phydev) |
2056 | phy_stop(priv->phydev); | |
2057 | ||
f8c5a875 | 2058 | spin_lock_irqsave(&priv->lock, flags); |
47dd7a54 | 2059 | |
874bd42d GC |
2060 | netif_device_detach(ndev); |
2061 | netif_stop_queue(ndev); | |
47dd7a54 | 2062 | |
874bd42d GC |
2063 | napi_disable(&priv->napi); |
2064 | ||
2065 | /* Stop TX/RX DMA */ | |
2066 | priv->hw->dma->stop_tx(priv->ioaddr); | |
2067 | priv->hw->dma->stop_rx(priv->ioaddr); | |
2068 | /* Clear the Rx/Tx descriptors */ | |
2069 | priv->hw->desc->init_rx_desc(priv->dma_rx, priv->dma_rx_size, | |
2070 | dis_ic); | |
2071 | priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size); | |
2072 | ||
2073 | /* Enable Power down mode by programming the PMT regs */ | |
2074 | if (device_may_wakeup(priv->device)) | |
2075 | priv->hw->mac->pmt(priv->ioaddr, priv->wolopts); | |
ba1377ff | 2076 | else { |
bfab27a1 | 2077 | stmmac_set_mac(priv->ioaddr, false); |
ba1377ff | 2078 | /* Disable clock in case of PWM is off */ |
a630844d | 2079 | clk_disable_unprepare(priv->stmmac_clk); |
ba1377ff | 2080 | } |
f8c5a875 | 2081 | spin_unlock_irqrestore(&priv->lock, flags); |
47dd7a54 GC |
2082 | return 0; |
2083 | } | |
2084 | ||
bfab27a1 | 2085 | int stmmac_resume(struct net_device *ndev) |
47dd7a54 | 2086 | { |
874bd42d | 2087 | struct stmmac_priv *priv = netdev_priv(ndev); |
f8c5a875 | 2088 | unsigned long flags; |
47dd7a54 | 2089 | |
874bd42d | 2090 | if (!netif_running(ndev)) |
47dd7a54 GC |
2091 | return 0; |
2092 | ||
f8c5a875 | 2093 | spin_lock_irqsave(&priv->lock, flags); |
c4433be6 | 2094 | |
47dd7a54 GC |
2095 | /* Power Down bit, into the PM register, is cleared |
2096 | * automatically as soon as a magic packet or a Wake-up frame | |
2097 | * is received. Anyway, it's better to manually clear | |
2098 | * this bit because it can generate problems while resuming | |
2099 | * from another devices (e.g. serial console). */ | |
874bd42d | 2100 | if (device_may_wakeup(priv->device)) |
543876c9 | 2101 | priv->hw->mac->pmt(priv->ioaddr, 0); |
ba1377ff GC |
2102 | else |
2103 | /* enable the clk prevously disabled */ | |
a630844d | 2104 | clk_prepare_enable(priv->stmmac_clk); |
47dd7a54 | 2105 | |
874bd42d | 2106 | netif_device_attach(ndev); |
47dd7a54 GC |
2107 | |
2108 | /* Enable the MAC and DMA */ | |
bfab27a1 | 2109 | stmmac_set_mac(priv->ioaddr, true); |
ad01b7d4 GC |
2110 | priv->hw->dma->start_tx(priv->ioaddr); |
2111 | priv->hw->dma->start_rx(priv->ioaddr); | |
47dd7a54 | 2112 | |
47dd7a54 GC |
2113 | napi_enable(&priv->napi); |
2114 | ||
874bd42d | 2115 | netif_start_queue(ndev); |
47dd7a54 | 2116 | |
f8c5a875 | 2117 | spin_unlock_irqrestore(&priv->lock, flags); |
102463b1 FV |
2118 | |
2119 | if (priv->phydev) | |
2120 | phy_start(priv->phydev); | |
2121 | ||
47dd7a54 GC |
2122 | return 0; |
2123 | } | |
47dd7a54 | 2124 | |
bfab27a1 | 2125 | int stmmac_freeze(struct net_device *ndev) |
874bd42d | 2126 | { |
874bd42d GC |
2127 | if (!ndev || !netif_running(ndev)) |
2128 | return 0; | |
2129 | ||
2130 | return stmmac_release(ndev); | |
2131 | } | |
2132 | ||
bfab27a1 | 2133 | int stmmac_restore(struct net_device *ndev) |
874bd42d | 2134 | { |
874bd42d GC |
2135 | if (!ndev || !netif_running(ndev)) |
2136 | return 0; | |
2137 | ||
2138 | return stmmac_open(ndev); | |
2139 | } | |
874bd42d | 2140 | #endif /* CONFIG_PM */ |
47dd7a54 | 2141 | |
33d5e332 GC |
2142 | /* Driver can be configured w/ and w/ both PCI and Platf drivers |
2143 | * depending on the configuration selected. | |
2144 | */ | |
ba27ec66 GC |
2145 | static int __init stmmac_init(void) |
2146 | { | |
33d5e332 GC |
2147 | int err_plt = 0; |
2148 | int err_pci = 0; | |
ba27ec66 | 2149 | |
33d5e332 GC |
2150 | err_plt = stmmac_register_platform(); |
2151 | err_pci = stmmac_register_pci(); | |
ba27ec66 | 2152 | |
33d5e332 GC |
2153 | if ((err_pci) && (err_plt)) { |
2154 | pr_err("stmmac: driver registration failed\n"); | |
2155 | return -EINVAL; | |
ba27ec66 GC |
2156 | } |
2157 | ||
33d5e332 | 2158 | return 0; |
ba27ec66 GC |
2159 | } |
2160 | ||
2161 | static void __exit stmmac_exit(void) | |
2162 | { | |
33d5e332 GC |
2163 | stmmac_unregister_platform(); |
2164 | stmmac_unregister_pci(); | |
ba27ec66 GC |
2165 | } |
2166 | ||
2167 | module_init(stmmac_init); | |
2168 | module_exit(stmmac_exit); | |
2169 | ||
47dd7a54 GC |
2170 | #ifndef MODULE |
2171 | static int __init stmmac_cmdline_opt(char *str) | |
2172 | { | |
2173 | char *opt; | |
2174 | ||
2175 | if (!str || !*str) | |
2176 | return -EINVAL; | |
2177 | while ((opt = strsep(&str, ",")) != NULL) { | |
f3240e28 | 2178 | if (!strncmp(opt, "debug:", 6)) { |
ea2ab871 | 2179 | if (kstrtoint(opt + 6, 0, &debug)) |
f3240e28 GC |
2180 | goto err; |
2181 | } else if (!strncmp(opt, "phyaddr:", 8)) { | |
ea2ab871 | 2182 | if (kstrtoint(opt + 8, 0, &phyaddr)) |
f3240e28 GC |
2183 | goto err; |
2184 | } else if (!strncmp(opt, "dma_txsize:", 11)) { | |
ea2ab871 | 2185 | if (kstrtoint(opt + 11, 0, &dma_txsize)) |
f3240e28 GC |
2186 | goto err; |
2187 | } else if (!strncmp(opt, "dma_rxsize:", 11)) { | |
ea2ab871 | 2188 | if (kstrtoint(opt + 11, 0, &dma_rxsize)) |
f3240e28 GC |
2189 | goto err; |
2190 | } else if (!strncmp(opt, "buf_sz:", 7)) { | |
ea2ab871 | 2191 | if (kstrtoint(opt + 7, 0, &buf_sz)) |
f3240e28 GC |
2192 | goto err; |
2193 | } else if (!strncmp(opt, "tc:", 3)) { | |
ea2ab871 | 2194 | if (kstrtoint(opt + 3, 0, &tc)) |
f3240e28 GC |
2195 | goto err; |
2196 | } else if (!strncmp(opt, "watchdog:", 9)) { | |
ea2ab871 | 2197 | if (kstrtoint(opt + 9, 0, &watchdog)) |
f3240e28 GC |
2198 | goto err; |
2199 | } else if (!strncmp(opt, "flow_ctrl:", 10)) { | |
ea2ab871 | 2200 | if (kstrtoint(opt + 10, 0, &flow_ctrl)) |
f3240e28 GC |
2201 | goto err; |
2202 | } else if (!strncmp(opt, "pause:", 6)) { | |
ea2ab871 | 2203 | if (kstrtoint(opt + 6, 0, &pause)) |
f3240e28 | 2204 | goto err; |
d765955d GC |
2205 | } else if (!strncmp(opt, "eee_timer:", 6)) { |
2206 | if (kstrtoint(opt + 10, 0, &eee_timer)) | |
2207 | goto err; | |
f3240e28 | 2208 | } |
47dd7a54 GC |
2209 | } |
2210 | return 0; | |
f3240e28 GC |
2211 | |
2212 | err: | |
2213 | pr_err("%s: ERROR broken module parameter conversion", __func__); | |
2214 | return -EINVAL; | |
47dd7a54 GC |
2215 | } |
2216 | ||
2217 | __setup("stmmaceth=", stmmac_cmdline_opt); | |
2218 | #endif | |
6fc0d0f2 GC |
2219 | |
2220 | MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver"); | |
2221 | MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); | |
2222 | MODULE_LICENSE("GPL"); |