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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / chelsio / cxgb3 / xgmac.c
blob3af19a55037245827c7d4f5713391678185e1231
1 /*
2 * Copyright (c) 2005-2008 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include "common.h"
33 #include "regs.h"
34
35 /*
36 * # of exact address filters. The first one is used for the station address,
37 * the rest are available for multicast addresses.
38 */
39 #define EXACT_ADDR_FILTERS 8
40
41 static inline int macidx(const struct cmac *mac)
42 {
43 return mac->offset / (XGMAC0_1_BASE_ADDR - XGMAC0_0_BASE_ADDR);
44 }
45
46 static void xaui_serdes_reset(struct cmac *mac)
47 {
48 static const unsigned int clear[] = {
49 F_PWRDN0 | F_PWRDN1, F_RESETPLL01, F_RESET0 | F_RESET1,
50 F_PWRDN2 | F_PWRDN3, F_RESETPLL23, F_RESET2 | F_RESET3
51 };
52
53 int i;
54 struct adapter *adap = mac->adapter;
55 u32 ctrl = A_XGM_SERDES_CTRL0 + mac->offset;
56
57 t3_write_reg(adap, ctrl, adap->params.vpd.xauicfg[macidx(mac)] |
58 F_RESET3 | F_RESET2 | F_RESET1 | F_RESET0 |
59 F_PWRDN3 | F_PWRDN2 | F_PWRDN1 | F_PWRDN0 |
60 F_RESETPLL23 | F_RESETPLL01);
61 t3_read_reg(adap, ctrl);
62 udelay(15);
63
64 for (i = 0; i < ARRAY_SIZE(clear); i++) {
65 t3_set_reg_field(adap, ctrl, clear[i], 0);
66 udelay(15);
67 }
68 }
69
70 void t3b_pcs_reset(struct cmac *mac)
71 {
72 t3_set_reg_field(mac->adapter, A_XGM_RESET_CTRL + mac->offset,
73 F_PCS_RESET_, 0);
74 udelay(20);
75 t3_set_reg_field(mac->adapter, A_XGM_RESET_CTRL + mac->offset, 0,
76 F_PCS_RESET_);
77 }
78
79 int t3_mac_reset(struct cmac *mac)
80 {
81 static const struct addr_val_pair mac_reset_avp[] = {
82 {A_XGM_TX_CTRL, 0},
83 {A_XGM_RX_CTRL, 0},
84 {A_XGM_RX_CFG, F_DISPAUSEFRAMES | F_EN1536BFRAMES |
85 F_RMFCS | F_ENJUMBO | F_ENHASHMCAST},
86 {A_XGM_RX_HASH_LOW, 0},
87 {A_XGM_RX_HASH_HIGH, 0},
88 {A_XGM_RX_EXACT_MATCH_LOW_1, 0},
89 {A_XGM_RX_EXACT_MATCH_LOW_2, 0},
90 {A_XGM_RX_EXACT_MATCH_LOW_3, 0},
91 {A_XGM_RX_EXACT_MATCH_LOW_4, 0},
92 {A_XGM_RX_EXACT_MATCH_LOW_5, 0},
93 {A_XGM_RX_EXACT_MATCH_LOW_6, 0},
94 {A_XGM_RX_EXACT_MATCH_LOW_7, 0},
95 {A_XGM_RX_EXACT_MATCH_LOW_8, 0},
96 {A_XGM_STAT_CTRL, F_CLRSTATS}
97 };
98 u32 val;
99 struct adapter *adap = mac->adapter;
100 unsigned int oft = mac->offset;
101
102 t3_write_reg(adap, A_XGM_RESET_CTRL + oft, F_MAC_RESET_);
103 t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
104
105 t3_write_regs(adap, mac_reset_avp, ARRAY_SIZE(mac_reset_avp), oft);
106 t3_set_reg_field(adap, A_XGM_RXFIFO_CFG + oft,
107 F_RXSTRFRWRD | F_DISERRFRAMES,
108 uses_xaui(adap) ? 0 : F_RXSTRFRWRD);
109 t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + oft, 0, F_UNDERUNFIX);
110
111 if (uses_xaui(adap)) {
112 if (adap->params.rev == 0) {
113 t3_set_reg_field(adap, A_XGM_SERDES_CTRL + oft, 0,
114 F_RXENABLE | F_TXENABLE);
115 if (t3_wait_op_done(adap, A_XGM_SERDES_STATUS1 + oft,
116 F_CMULOCK, 1, 5, 2)) {
117 CH_ERR(adap,
118 "MAC %d XAUI SERDES CMU lock failed\n",
119 macidx(mac));
120 return -1;
121 }
122 t3_set_reg_field(adap, A_XGM_SERDES_CTRL + oft, 0,
123 F_SERDESRESET_);
124 } else
125 xaui_serdes_reset(mac);
126 }
127
128 t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + oft,
129 V_RXMAXFRAMERSIZE(M_RXMAXFRAMERSIZE),
130 V_RXMAXFRAMERSIZE(MAX_FRAME_SIZE) | F_RXENFRAMER);
131 val = F_MAC_RESET_ | F_XGMAC_STOP_EN;
132
133 if (is_10G(adap))
134 val |= F_PCS_RESET_;
135 else if (uses_xaui(adap))
136 val |= F_PCS_RESET_ | F_XG2G_RESET_;
137 else
138 val |= F_RGMII_RESET_ | F_XG2G_RESET_;
139 t3_write_reg(adap, A_XGM_RESET_CTRL + oft, val);
140 t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
141 if ((val & F_PCS_RESET_) && adap->params.rev) {
142 msleep(1);
143 t3b_pcs_reset(mac);
144 }
145
146 memset(&mac->stats, 0, sizeof(mac->stats));
147 return 0;
148 }
149
150 static int t3b2_mac_reset(struct cmac *mac)
151 {
152 struct adapter *adap = mac->adapter;
153 unsigned int oft = mac->offset, store;
154 int idx = macidx(mac);
155 u32 val;
156
157 if (!macidx(mac))
158 t3_set_reg_field(adap, A_MPS_CFG, F_PORT0ACTIVE, 0);
159 else
160 t3_set_reg_field(adap, A_MPS_CFG, F_PORT1ACTIVE, 0);
161
162 /* Stop NIC traffic to reduce the number of TXTOGGLES */
163 t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 0);
164 /* Ensure TX drains */
165 t3_set_reg_field(adap, A_XGM_TX_CFG + oft, F_TXPAUSEEN, 0);
166
167 t3_write_reg(adap, A_XGM_RESET_CTRL + oft, F_MAC_RESET_);
168 t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
169
170 /* Store A_TP_TX_DROP_CFG_CH0 */
171 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
172 store = t3_read_reg(adap, A_TP_TX_DROP_CFG_CH0 + idx);
173
174 msleep(10);
175
176 /* Change DROP_CFG to 0xc0000011 */
177 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
178 t3_write_reg(adap, A_TP_PIO_DATA, 0xc0000011);
179
180 /* Check for xgm Rx fifo empty */
181 /* Increased loop count to 1000 from 5 cover 1G and 100Mbps case */
182 if (t3_wait_op_done(adap, A_XGM_RX_MAX_PKT_SIZE_ERR_CNT + oft,
183 0x80000000, 1, 1000, 2)) {
184 CH_ERR(adap, "MAC %d Rx fifo drain failed\n",
185 macidx(mac));
186 return -1;
187 }
188
189 t3_write_reg(adap, A_XGM_RESET_CTRL + oft, 0);
190 t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
191
192 val = F_MAC_RESET_;
193 if (is_10G(adap))
194 val |= F_PCS_RESET_;
195 else if (uses_xaui(adap))
196 val |= F_PCS_RESET_ | F_XG2G_RESET_;
197 else
198 val |= F_RGMII_RESET_ | F_XG2G_RESET_;
199 t3_write_reg(adap, A_XGM_RESET_CTRL + oft, val);
200 t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
201 if ((val & F_PCS_RESET_) && adap->params.rev) {
202 msleep(1);
203 t3b_pcs_reset(mac);
204 }
205 t3_write_reg(adap, A_XGM_RX_CFG + oft,
206 F_DISPAUSEFRAMES | F_EN1536BFRAMES |
207 F_RMFCS | F_ENJUMBO | F_ENHASHMCAST);
208
209 /* Restore the DROP_CFG */
210 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
211 t3_write_reg(adap, A_TP_PIO_DATA, store);
212
213 if (!idx)
214 t3_set_reg_field(adap, A_MPS_CFG, 0, F_PORT0ACTIVE);
215 else
216 t3_set_reg_field(adap, A_MPS_CFG, 0, F_PORT1ACTIVE);
217
218 /* re-enable nic traffic */
219 t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 1);
220
221 /* Set: re-enable NIC traffic */
222 t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 1);
223
224 return 0;
225 }
226
227 /*
228 * Set the exact match register 'idx' to recognize the given Ethernet address.
229 */
230 static void set_addr_filter(struct cmac *mac, int idx, const u8 * addr)
231 {
232 u32 addr_lo, addr_hi;
233 unsigned int oft = mac->offset + idx * 8;
234
235 addr_lo = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
236 addr_hi = (addr[5] << 8) | addr[4];
237
238 t3_write_reg(mac->adapter, A_XGM_RX_EXACT_MATCH_LOW_1 + oft, addr_lo);
239 t3_write_reg(mac->adapter, A_XGM_RX_EXACT_MATCH_HIGH_1 + oft, addr_hi);
240 }
241
242 /* Set one of the station's unicast MAC addresses. */
243 int t3_mac_set_address(struct cmac *mac, unsigned int idx, u8 addr[6])
244 {
245 if (idx >= mac->nucast)
246 return -EINVAL;
247 set_addr_filter(mac, idx, addr);
248 return 0;
249 }
250
251 /*
252 * Specify the number of exact address filters that should be reserved for
253 * unicast addresses. Caller should reload the unicast and multicast addresses
254 * after calling this.
255 */
256 int t3_mac_set_num_ucast(struct cmac *mac, int n)
257 {
258 if (n > EXACT_ADDR_FILTERS)
259 return -EINVAL;
260 mac->nucast = n;
261 return 0;
262 }
263
264 void t3_mac_disable_exact_filters(struct cmac *mac)
265 {
266 unsigned int i, reg = mac->offset + A_XGM_RX_EXACT_MATCH_LOW_1;
267
268 for (i = 0; i < EXACT_ADDR_FILTERS; i++, reg += 8) {
269 u32 v = t3_read_reg(mac->adapter, reg);
270 t3_write_reg(mac->adapter, reg, v);
271 }
272 t3_read_reg(mac->adapter, A_XGM_RX_EXACT_MATCH_LOW_1); /* flush */
273 }
274
275 void t3_mac_enable_exact_filters(struct cmac *mac)
276 {
277 unsigned int i, reg = mac->offset + A_XGM_RX_EXACT_MATCH_HIGH_1;
278
279 for (i = 0; i < EXACT_ADDR_FILTERS; i++, reg += 8) {
280 u32 v = t3_read_reg(mac->adapter, reg);
281 t3_write_reg(mac->adapter, reg, v);
282 }
283 t3_read_reg(mac->adapter, A_XGM_RX_EXACT_MATCH_LOW_1); /* flush */
284 }
285
286 /* Calculate the RX hash filter index of an Ethernet address */
287 static int hash_hw_addr(const u8 * addr)
288 {
289 int hash = 0, octet, bit, i = 0, c;
290
291 for (octet = 0; octet < 6; ++octet)
292 for (c = addr[octet], bit = 0; bit < 8; c >>= 1, ++bit) {
293 hash ^= (c & 1) << i;
294 if (++i == 6)
295 i = 0;
296 }
297 return hash;
298 }
299
300 int t3_mac_set_rx_mode(struct cmac *mac, struct net_device *dev)
301 {
302 u32 val, hash_lo, hash_hi;
303 struct adapter *adap = mac->adapter;
304 unsigned int oft = mac->offset;
305
306 val = t3_read_reg(adap, A_XGM_RX_CFG + oft) & ~F_COPYALLFRAMES;
307 if (dev->flags & IFF_PROMISC)
308 val |= F_COPYALLFRAMES;
309 t3_write_reg(adap, A_XGM_RX_CFG + oft, val);
310
311 if (dev->flags & IFF_ALLMULTI)
312 hash_lo = hash_hi = 0xffffffff;
313 else {
314 struct netdev_hw_addr *ha;
315 int exact_addr_idx = mac->nucast;
316
317 hash_lo = hash_hi = 0;
318 netdev_for_each_mc_addr(ha, dev)
319 if (exact_addr_idx < EXACT_ADDR_FILTERS)
320 set_addr_filter(mac, exact_addr_idx++,
321 ha->addr);
322 else {
323 int hash = hash_hw_addr(ha->addr);
324
325 if (hash < 32)
326 hash_lo |= (1 << hash);
327 else
328 hash_hi |= (1 << (hash - 32));
329 }
330 }
331
332 t3_write_reg(adap, A_XGM_RX_HASH_LOW + oft, hash_lo);
333 t3_write_reg(adap, A_XGM_RX_HASH_HIGH + oft, hash_hi);
334 return 0;
335 }
336
337 static int rx_fifo_hwm(int mtu)
338 {
339 int hwm;
340
341 hwm = max(MAC_RXFIFO_SIZE - 3 * mtu, (MAC_RXFIFO_SIZE * 38) / 100);
342 return min(hwm, MAC_RXFIFO_SIZE - 8192);
343 }
344
345 int t3_mac_set_mtu(struct cmac *mac, unsigned int mtu)
346 {
347 int hwm, lwm, divisor;
348 int ipg;
349 unsigned int thres, v, reg;
350 struct adapter *adap = mac->adapter;
351
352 /*
353 * MAX_FRAME_SIZE inludes header + FCS, mtu doesn't. The HW max
354 * packet size register includes header, but not FCS.
355 */
356 mtu += 14;
357 if (mtu > 1536)
358 mtu += 4;
359
360 if (mtu > MAX_FRAME_SIZE - 4)
361 return -EINVAL;
362 t3_write_reg(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset, mtu);
363
364 if (adap->params.rev >= T3_REV_B2 &&
365 (t3_read_reg(adap, A_XGM_RX_CTRL + mac->offset) & F_RXEN)) {
366 t3_mac_disable_exact_filters(mac);
367 v = t3_read_reg(adap, A_XGM_RX_CFG + mac->offset);
368 t3_set_reg_field(adap, A_XGM_RX_CFG + mac->offset,
369 F_ENHASHMCAST | F_COPYALLFRAMES, F_DISBCAST);
370
371 reg = adap->params.rev == T3_REV_B2 ?
372 A_XGM_RX_MAX_PKT_SIZE_ERR_CNT : A_XGM_RXFIFO_CFG;
373
374 /* drain RX FIFO */
375 if (t3_wait_op_done(adap, reg + mac->offset,
376 F_RXFIFO_EMPTY, 1, 20, 5)) {
377 t3_write_reg(adap, A_XGM_RX_CFG + mac->offset, v);
378 t3_mac_enable_exact_filters(mac);
379 return -EIO;
380 }
381 t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset,
382 V_RXMAXPKTSIZE(M_RXMAXPKTSIZE),
383 V_RXMAXPKTSIZE(mtu));
384 t3_write_reg(adap, A_XGM_RX_CFG + mac->offset, v);
385 t3_mac_enable_exact_filters(mac);
386 } else
387 t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset,
388 V_RXMAXPKTSIZE(M_RXMAXPKTSIZE),
389 V_RXMAXPKTSIZE(mtu));
390
391 /*
392 * Adjust the PAUSE frame watermarks. We always set the LWM, and the
393 * HWM only if flow-control is enabled.
394 */
395 hwm = rx_fifo_hwm(mtu);
396 lwm = min(3 * (int)mtu, MAC_RXFIFO_SIZE / 4);
397 v = t3_read_reg(adap, A_XGM_RXFIFO_CFG + mac->offset);
398 v &= ~V_RXFIFOPAUSELWM(M_RXFIFOPAUSELWM);
399 v |= V_RXFIFOPAUSELWM(lwm / 8);
400 if (G_RXFIFOPAUSEHWM(v))
401 v = (v & ~V_RXFIFOPAUSEHWM(M_RXFIFOPAUSEHWM)) |
402 V_RXFIFOPAUSEHWM(hwm / 8);
403
404 t3_write_reg(adap, A_XGM_RXFIFO_CFG + mac->offset, v);
405
406 /* Adjust the TX FIFO threshold based on the MTU */
407 thres = (adap->params.vpd.cclk * 1000) / 15625;
408 thres = (thres * mtu) / 1000;
409 if (is_10G(adap))
410 thres /= 10;
411 thres = mtu > thres ? (mtu - thres + 7) / 8 : 0;
412 thres = max(thres, 8U); /* need at least 8 */
413 ipg = (adap->params.rev == T3_REV_C) ? 0 : 1;
414 t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + mac->offset,
415 V_TXFIFOTHRESH(M_TXFIFOTHRESH) | V_TXIPG(M_TXIPG),
416 V_TXFIFOTHRESH(thres) | V_TXIPG(ipg));
417
418 if (adap->params.rev > 0) {
419 divisor = (adap->params.rev == T3_REV_C) ? 64 : 8;
420 t3_write_reg(adap, A_XGM_PAUSE_TIMER + mac->offset,
421 (hwm - lwm) * 4 / divisor);
422 }
423 t3_write_reg(adap, A_XGM_TX_PAUSE_QUANTA + mac->offset,
424 MAC_RXFIFO_SIZE * 4 * 8 / 512);
425 return 0;
426 }
427
428 int t3_mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex, int fc)
429 {
430 u32 val;
431 struct adapter *adap = mac->adapter;
432 unsigned int oft = mac->offset;
433
434 if (duplex >= 0 && duplex != DUPLEX_FULL)
435 return -EINVAL;
436 if (speed >= 0) {
437 if (speed == SPEED_10)
438 val = V_PORTSPEED(0);
439 else if (speed == SPEED_100)
440 val = V_PORTSPEED(1);
441 else if (speed == SPEED_1000)
442 val = V_PORTSPEED(2);
443 else if (speed == SPEED_10000)
444 val = V_PORTSPEED(3);
445 else
446 return -EINVAL;
447
448 t3_set_reg_field(adap, A_XGM_PORT_CFG + oft,
449 V_PORTSPEED(M_PORTSPEED), val);
450 }
451
452 val = t3_read_reg(adap, A_XGM_RXFIFO_CFG + oft);
453 val &= ~V_RXFIFOPAUSEHWM(M_RXFIFOPAUSEHWM);
454 if (fc & PAUSE_TX) {
455 u32 rx_max_pkt_size =
456 G_RXMAXPKTSIZE(t3_read_reg(adap,
457 A_XGM_RX_MAX_PKT_SIZE + oft));
458 val |= V_RXFIFOPAUSEHWM(rx_fifo_hwm(rx_max_pkt_size) / 8);
459 }
460 t3_write_reg(adap, A_XGM_RXFIFO_CFG + oft, val);
461
462 t3_set_reg_field(adap, A_XGM_TX_CFG + oft, F_TXPAUSEEN,
463 (fc & PAUSE_RX) ? F_TXPAUSEEN : 0);
464 return 0;
465 }
466
467 int t3_mac_enable(struct cmac *mac, int which)
468 {
469 int idx = macidx(mac);
470 struct adapter *adap = mac->adapter;
471 unsigned int oft = mac->offset;
472 struct mac_stats *s = &mac->stats;
473
474 if (which & MAC_DIRECTION_TX) {
475 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
476 t3_write_reg(adap, A_TP_PIO_DATA,
477 adap->params.rev == T3_REV_C ?
478 0xc4ffff01 : 0xc0ede401);
479 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_MODE);
480 t3_set_reg_field(adap, A_TP_PIO_DATA, 1 << idx,
481 adap->params.rev == T3_REV_C ? 0 : 1 << idx);
482
483 t3_write_reg(adap, A_XGM_TX_CTRL + oft, F_TXEN);
484
485 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CNT_CH0 + idx);
486 mac->tx_mcnt = s->tx_frames;
487 mac->tx_tcnt = (G_TXDROPCNTCH0RCVD(t3_read_reg(adap,
488 A_TP_PIO_DATA)));
489 mac->tx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
490 A_XGM_TX_SPI4_SOP_EOP_CNT +
491 oft)));
492 mac->rx_mcnt = s->rx_frames;
493 mac->rx_pause = s->rx_pause;
494 mac->rx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
495 A_XGM_RX_SPI4_SOP_EOP_CNT +
496 oft)));
497 mac->rx_ocnt = s->rx_fifo_ovfl;
498 mac->txen = F_TXEN;
499 mac->toggle_cnt = 0;
500 }
501 if (which & MAC_DIRECTION_RX)
502 t3_write_reg(adap, A_XGM_RX_CTRL + oft, F_RXEN);
503 return 0;
504 }
505
506 int t3_mac_disable(struct cmac *mac, int which)
507 {
508 struct adapter *adap = mac->adapter;
509
510 if (which & MAC_DIRECTION_TX) {
511 t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
512 mac->txen = 0;
513 }
514 if (which & MAC_DIRECTION_RX) {
515 int val = F_MAC_RESET_;
516
517 t3_set_reg_field(mac->adapter, A_XGM_RESET_CTRL + mac->offset,
518 F_PCS_RESET_, 0);
519 msleep(100);
520 t3_write_reg(adap, A_XGM_RX_CTRL + mac->offset, 0);
521 if (is_10G(adap))
522 val |= F_PCS_RESET_;
523 else if (uses_xaui(adap))
524 val |= F_PCS_RESET_ | F_XG2G_RESET_;
525 else
526 val |= F_RGMII_RESET_ | F_XG2G_RESET_;
527 t3_write_reg(mac->adapter, A_XGM_RESET_CTRL + mac->offset, val);
528 }
529 return 0;
530 }
531
532 int t3b2_mac_watchdog_task(struct cmac *mac)
533 {
534 struct adapter *adap = mac->adapter;
535 struct mac_stats *s = &mac->stats;
536 unsigned int tx_tcnt, tx_xcnt;
537 u64 tx_mcnt = s->tx_frames;
538 int status;
539
540 status = 0;
541 tx_xcnt = 1; /* By default tx_xcnt is making progress */
542 tx_tcnt = mac->tx_tcnt; /* If tx_mcnt is progressing ignore tx_tcnt */
543 if (tx_mcnt == mac->tx_mcnt && mac->rx_pause == s->rx_pause) {
544 tx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
545 A_XGM_TX_SPI4_SOP_EOP_CNT +
546 mac->offset)));
547 if (tx_xcnt == 0) {
548 t3_write_reg(adap, A_TP_PIO_ADDR,
549 A_TP_TX_DROP_CNT_CH0 + macidx(mac));
550 tx_tcnt = (G_TXDROPCNTCH0RCVD(t3_read_reg(adap,
551 A_TP_PIO_DATA)));
552 } else {
553 goto out;
554 }
555 } else {
556 mac->toggle_cnt = 0;
557 goto out;
558 }
559
560 if ((tx_tcnt != mac->tx_tcnt) && (mac->tx_xcnt == 0)) {
561 if (mac->toggle_cnt > 4) {
562 status = 2;
563 goto out;
564 } else {
565 status = 1;
566 goto out;
567 }
568 } else {
569 mac->toggle_cnt = 0;
570 goto out;
571 }
572
573 out:
574 mac->tx_tcnt = tx_tcnt;
575 mac->tx_xcnt = tx_xcnt;
576 mac->tx_mcnt = s->tx_frames;
577 mac->rx_pause = s->rx_pause;
578 if (status == 1) {
579 t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
580 t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
581 t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, mac->txen);
582 t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
583 mac->toggle_cnt++;
584 } else if (status == 2) {
585 t3b2_mac_reset(mac);
586 mac->toggle_cnt = 0;
587 }
588 return status;
589 }
590
591 /*
592 * This function is called periodically to accumulate the current values of the
593 * RMON counters into the port statistics. Since the packet counters are only
594 * 32 bits they can overflow in ~286 secs at 10G, so the function should be
595 * called more frequently than that. The byte counters are 45-bit wide, they
596 * would overflow in ~7.8 hours.
597 */
598 const struct mac_stats *t3_mac_update_stats(struct cmac *mac)
599 {
600 #define RMON_READ(mac, addr) t3_read_reg(mac->adapter, addr + mac->offset)
601 #define RMON_UPDATE(mac, name, reg) \
602 (mac)->stats.name += (u64)RMON_READ(mac, A_XGM_STAT_##reg)
603 #define RMON_UPDATE64(mac, name, reg_lo, reg_hi) \
604 (mac)->stats.name += RMON_READ(mac, A_XGM_STAT_##reg_lo) + \
605 ((u64)RMON_READ(mac, A_XGM_STAT_##reg_hi) << 32)
606
607 u32 v, lo;
608
609 RMON_UPDATE64(mac, rx_octets, RX_BYTES_LOW, RX_BYTES_HIGH);
610 RMON_UPDATE64(mac, rx_frames, RX_FRAMES_LOW, RX_FRAMES_HIGH);
611 RMON_UPDATE(mac, rx_mcast_frames, RX_MCAST_FRAMES);
612 RMON_UPDATE(mac, rx_bcast_frames, RX_BCAST_FRAMES);
613 RMON_UPDATE(mac, rx_fcs_errs, RX_CRC_ERR_FRAMES);
614 RMON_UPDATE(mac, rx_pause, RX_PAUSE_FRAMES);
615 RMON_UPDATE(mac, rx_jabber, RX_JABBER_FRAMES);
616 RMON_UPDATE(mac, rx_short, RX_SHORT_FRAMES);
617 RMON_UPDATE(mac, rx_symbol_errs, RX_SYM_CODE_ERR_FRAMES);
618
619 RMON_UPDATE(mac, rx_too_long, RX_OVERSIZE_FRAMES);
620
621 v = RMON_READ(mac, A_XGM_RX_MAX_PKT_SIZE_ERR_CNT);
622 if (mac->adapter->params.rev == T3_REV_B2)
623 v &= 0x7fffffff;
624 mac->stats.rx_too_long += v;
625
626 RMON_UPDATE(mac, rx_frames_64, RX_64B_FRAMES);
627 RMON_UPDATE(mac, rx_frames_65_127, RX_65_127B_FRAMES);
628 RMON_UPDATE(mac, rx_frames_128_255, RX_128_255B_FRAMES);
629 RMON_UPDATE(mac, rx_frames_256_511, RX_256_511B_FRAMES);
630 RMON_UPDATE(mac, rx_frames_512_1023, RX_512_1023B_FRAMES);
631 RMON_UPDATE(mac, rx_frames_1024_1518, RX_1024_1518B_FRAMES);
632 RMON_UPDATE(mac, rx_frames_1519_max, RX_1519_MAXB_FRAMES);
633
634 RMON_UPDATE64(mac, tx_octets, TX_BYTE_LOW, TX_BYTE_HIGH);
635 RMON_UPDATE64(mac, tx_frames, TX_FRAME_LOW, TX_FRAME_HIGH);
636 RMON_UPDATE(mac, tx_mcast_frames, TX_MCAST);
637 RMON_UPDATE(mac, tx_bcast_frames, TX_BCAST);
638 RMON_UPDATE(mac, tx_pause, TX_PAUSE);
639 /* This counts error frames in general (bad FCS, underrun, etc). */
640 RMON_UPDATE(mac, tx_underrun, TX_ERR_FRAMES);
641
642 RMON_UPDATE(mac, tx_frames_64, TX_64B_FRAMES);
643 RMON_UPDATE(mac, tx_frames_65_127, TX_65_127B_FRAMES);
644 RMON_UPDATE(mac, tx_frames_128_255, TX_128_255B_FRAMES);
645 RMON_UPDATE(mac, tx_frames_256_511, TX_256_511B_FRAMES);
646 RMON_UPDATE(mac, tx_frames_512_1023, TX_512_1023B_FRAMES);
647 RMON_UPDATE(mac, tx_frames_1024_1518, TX_1024_1518B_FRAMES);
648 RMON_UPDATE(mac, tx_frames_1519_max, TX_1519_MAXB_FRAMES);
649
650 /* The next stat isn't clear-on-read. */
651 t3_write_reg(mac->adapter, A_TP_MIB_INDEX, mac->offset ? 51 : 50);
652 v = t3_read_reg(mac->adapter, A_TP_MIB_RDATA);
653 lo = (u32) mac->stats.rx_cong_drops;
654 mac->stats.rx_cong_drops += (u64) (v - lo);
655
656 return &mac->stats;
657 }
Linux with added FPC-III support