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8635c9484b3ae3ba07e0dfb8cb6f38a341d5c169
[deliverable/linux.git] / drivers / net / ethernet / amd / xgbe / xgbe-drv.c
1 /*
2 * AMD 10Gb Ethernet driver
3 *
4 * This file is available to you under your choice of the following two
5 * licenses:
6 *
7 * License 1: GPLv2
8 *
9 * Copyright (c) 2014 Advanced Micro Devices, Inc.
10 *
11 * This file is free software; you may copy, redistribute and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This file is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 *
24 * This file incorporates work covered by the following copyright and
25 * permission notice:
26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation
27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
28 * Inc. unless otherwise expressly agreed to in writing between Synopsys
29 * and you.
30 *
31 * The Software IS NOT an item of Licensed Software or Licensed Product
32 * under any End User Software License Agreement or Agreement for Licensed
33 * Product with Synopsys or any supplement thereto. Permission is hereby
34 * granted, free of charge, to any person obtaining a copy of this software
35 * annotated with this license and the Software, to deal in the Software
36 * without restriction, including without limitation the rights to use,
37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
38 * of the Software, and to permit persons to whom the Software is furnished
39 * to do so, subject to the following conditions:
40 *
41 * The above copyright notice and this permission notice shall be included
42 * in all copies or substantial portions of the Software.
43 *
44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
54 * THE POSSIBILITY OF SUCH DAMAGE.
55 *
56 *
57 * License 2: Modified BSD
58 *
59 * Copyright (c) 2014 Advanced Micro Devices, Inc.
60 * All rights reserved.
61 *
62 * Redistribution and use in source and binary forms, with or without
63 * modification, are permitted provided that the following conditions are met:
64 * * Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
66 * * Redistributions in binary form must reproduce the above copyright
67 * notice, this list of conditions and the following disclaimer in the
68 * documentation and/or other materials provided with the distribution.
69 * * Neither the name of Advanced Micro Devices, Inc. nor the
70 * names of its contributors may be used to endorse or promote products
71 * derived from this software without specific prior written permission.
72 *
73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
83 *
84 * This file incorporates work covered by the following copyright and
85 * permission notice:
86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation
87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
88 * Inc. unless otherwise expressly agreed to in writing between Synopsys
89 * and you.
90 *
91 * The Software IS NOT an item of Licensed Software or Licensed Product
92 * under any End User Software License Agreement or Agreement for Licensed
93 * Product with Synopsys or any supplement thereto. Permission is hereby
94 * granted, free of charge, to any person obtaining a copy of this software
95 * annotated with this license and the Software, to deal in the Software
96 * without restriction, including without limitation the rights to use,
97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
98 * of the Software, and to permit persons to whom the Software is furnished
99 * to do so, subject to the following conditions:
100 *
101 * The above copyright notice and this permission notice shall be included
102 * in all copies or substantial portions of the Software.
103 *
104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
114 * THE POSSIBILITY OF SUCH DAMAGE.
115 */
116
117 #include <linux/platform_device.h>
118 #include <linux/spinlock.h>
119 #include <linux/tcp.h>
120 #include <linux/if_vlan.h>
121 #include <net/busy_poll.h>
122 #include <linux/clk.h>
123 #include <linux/if_ether.h>
124 #include <linux/net_tstamp.h>
125 #include <linux/phy.h>
126
127 #include "xgbe.h"
128 #include "xgbe-common.h"
129
130 static int xgbe_one_poll(struct napi_struct *, int);
131 static int xgbe_all_poll(struct napi_struct *, int);
132 static void xgbe_set_rx_mode(struct net_device *);
133
134 static int xgbe_alloc_channels(struct xgbe_prv_data *pdata)
135 {
136 struct xgbe_channel *channel_mem, *channel;
137 struct xgbe_ring *tx_ring, *rx_ring;
138 unsigned int count, i;
139 int ret = -ENOMEM;
140
141 count = max_t(unsigned int, pdata->tx_ring_count, pdata->rx_ring_count);
142
143 channel_mem = kcalloc(count, sizeof(struct xgbe_channel), GFP_KERNEL);
144 if (!channel_mem)
145 goto err_channel;
146
147 tx_ring = kcalloc(pdata->tx_ring_count, sizeof(struct xgbe_ring),
148 GFP_KERNEL);
149 if (!tx_ring)
150 goto err_tx_ring;
151
152 rx_ring = kcalloc(pdata->rx_ring_count, sizeof(struct xgbe_ring),
153 GFP_KERNEL);
154 if (!rx_ring)
155 goto err_rx_ring;
156
157 for (i = 0, channel = channel_mem; i < count; i++, channel++) {
158 snprintf(channel->name, sizeof(channel->name), "channel-%d", i);
159 channel->pdata = pdata;
160 channel->queue_index = i;
161 channel->dma_regs = pdata->xgmac_regs + DMA_CH_BASE +
162 (DMA_CH_INC * i);
163
164 if (pdata->per_channel_irq) {
165 /* Get the DMA interrupt (offset 1) */
166 ret = platform_get_irq(pdata->pdev, i + 1);
167 if (ret < 0) {
168 netdev_err(pdata->netdev,
169 "platform_get_irq %u failed\n",
170 i + 1);
171 goto err_irq;
172 }
173
174 channel->dma_irq = ret;
175 }
176
177 if (i < pdata->tx_ring_count) {
178 spin_lock_init(&tx_ring->lock);
179 channel->tx_ring = tx_ring++;
180 }
181
182 if (i < pdata->rx_ring_count) {
183 spin_lock_init(&rx_ring->lock);
184 channel->rx_ring = rx_ring++;
185 }
186
187 DBGPR(" %s: queue=%u, dma_regs=%p, dma_irq=%d, tx=%p, rx=%p\n",
188 channel->name, channel->queue_index, channel->dma_regs,
189 channel->dma_irq, channel->tx_ring, channel->rx_ring);
190 }
191
192 pdata->channel = channel_mem;
193 pdata->channel_count = count;
194
195 return 0;
196
197 err_irq:
198 kfree(rx_ring);
199
200 err_rx_ring:
201 kfree(tx_ring);
202
203 err_tx_ring:
204 kfree(channel_mem);
205
206 err_channel:
207 return ret;
208 }
209
210 static void xgbe_free_channels(struct xgbe_prv_data *pdata)
211 {
212 if (!pdata->channel)
213 return;
214
215 kfree(pdata->channel->rx_ring);
216 kfree(pdata->channel->tx_ring);
217 kfree(pdata->channel);
218
219 pdata->channel = NULL;
220 pdata->channel_count = 0;
221 }
222
223 static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring)
224 {
225 return (ring->rdesc_count - (ring->cur - ring->dirty));
226 }
227
228 static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring)
229 {
230 return (ring->cur - ring->dirty);
231 }
232
233 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel,
234 struct xgbe_ring *ring, unsigned int count)
235 {
236 struct xgbe_prv_data *pdata = channel->pdata;
237
238 if (count > xgbe_tx_avail_desc(ring)) {
239 DBGPR(" Tx queue stopped, not enough descriptors available\n");
240 netif_stop_subqueue(pdata->netdev, channel->queue_index);
241 ring->tx.queue_stopped = 1;
242
243 /* If we haven't notified the hardware because of xmit_more
244 * support, tell it now
245 */
246 if (ring->tx.xmit_more)
247 pdata->hw_if.tx_start_xmit(channel, ring);
248
249 return NETDEV_TX_BUSY;
250 }
251
252 return 0;
253 }
254
255 static int xgbe_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu)
256 {
257 unsigned int rx_buf_size;
258
259 if (mtu > XGMAC_JUMBO_PACKET_MTU) {
260 netdev_alert(netdev, "MTU exceeds maximum supported value\n");
261 return -EINVAL;
262 }
263
264 rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
265 rx_buf_size = clamp_val(rx_buf_size, XGBE_RX_MIN_BUF_SIZE, PAGE_SIZE);
266
267 rx_buf_size = (rx_buf_size + XGBE_RX_BUF_ALIGN - 1) &
268 ~(XGBE_RX_BUF_ALIGN - 1);
269
270 return rx_buf_size;
271 }
272
273 static void xgbe_enable_rx_tx_ints(struct xgbe_prv_data *pdata)
274 {
275 struct xgbe_hw_if *hw_if = &pdata->hw_if;
276 struct xgbe_channel *channel;
277 enum xgbe_int int_id;
278 unsigned int i;
279
280 channel = pdata->channel;
281 for (i = 0; i < pdata->channel_count; i++, channel++) {
282 if (channel->tx_ring && channel->rx_ring)
283 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
284 else if (channel->tx_ring)
285 int_id = XGMAC_INT_DMA_CH_SR_TI;
286 else if (channel->rx_ring)
287 int_id = XGMAC_INT_DMA_CH_SR_RI;
288 else
289 continue;
290
291 hw_if->enable_int(channel, int_id);
292 }
293 }
294
295 static void xgbe_disable_rx_tx_ints(struct xgbe_prv_data *pdata)
296 {
297 struct xgbe_hw_if *hw_if = &pdata->hw_if;
298 struct xgbe_channel *channel;
299 enum xgbe_int int_id;
300 unsigned int i;
301
302 channel = pdata->channel;
303 for (i = 0; i < pdata->channel_count; i++, channel++) {
304 if (channel->tx_ring && channel->rx_ring)
305 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
306 else if (channel->tx_ring)
307 int_id = XGMAC_INT_DMA_CH_SR_TI;
308 else if (channel->rx_ring)
309 int_id = XGMAC_INT_DMA_CH_SR_RI;
310 else
311 continue;
312
313 hw_if->disable_int(channel, int_id);
314 }
315 }
316
317 static irqreturn_t xgbe_isr(int irq, void *data)
318 {
319 struct xgbe_prv_data *pdata = data;
320 struct xgbe_hw_if *hw_if = &pdata->hw_if;
321 struct xgbe_channel *channel;
322 unsigned int dma_isr, dma_ch_isr;
323 unsigned int mac_isr, mac_tssr;
324 unsigned int i;
325
326 /* The DMA interrupt status register also reports MAC and MTL
327 * interrupts. So for polling mode, we just need to check for
328 * this register to be non-zero
329 */
330 dma_isr = XGMAC_IOREAD(pdata, DMA_ISR);
331 if (!dma_isr)
332 goto isr_done;
333
334 DBGPR(" DMA_ISR = %08x\n", dma_isr);
335
336 for (i = 0; i < pdata->channel_count; i++) {
337 if (!(dma_isr & (1 << i)))
338 continue;
339
340 channel = pdata->channel + i;
341
342 dma_ch_isr = XGMAC_DMA_IOREAD(channel, DMA_CH_SR);
343 DBGPR(" DMA_CH%u_ISR = %08x\n", i, dma_ch_isr);
344
345 /* The TI or RI interrupt bits may still be set even if using
346 * per channel DMA interrupts. Check to be sure those are not
347 * enabled before using the private data napi structure.
348 */
349 if (!pdata->per_channel_irq &&
350 (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) ||
351 XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI))) {
352 if (napi_schedule_prep(&pdata->napi)) {
353 /* Disable Tx and Rx interrupts */
354 xgbe_disable_rx_tx_ints(pdata);
355
356 /* Turn on polling */
357 __napi_schedule(&pdata->napi);
358 }
359 }
360
361 /* Restart the device on a Fatal Bus Error */
362 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, FBE))
363 schedule_work(&pdata->restart_work);
364
365 /* Clear all interrupt signals */
366 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_ch_isr);
367 }
368
369 if (XGMAC_GET_BITS(dma_isr, DMA_ISR, MACIS)) {
370 mac_isr = XGMAC_IOREAD(pdata, MAC_ISR);
371
372 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCTXIS))
373 hw_if->tx_mmc_int(pdata);
374
375 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCRXIS))
376 hw_if->rx_mmc_int(pdata);
377
378 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) {
379 mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR);
380
381 if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) {
382 /* Read Tx Timestamp to clear interrupt */
383 pdata->tx_tstamp =
384 hw_if->get_tx_tstamp(pdata);
385 schedule_work(&pdata->tx_tstamp_work);
386 }
387 }
388 }
389
390 DBGPR(" DMA_ISR = %08x\n", XGMAC_IOREAD(pdata, DMA_ISR));
391
392 isr_done:
393 return IRQ_HANDLED;
394 }
395
396 static irqreturn_t xgbe_dma_isr(int irq, void *data)
397 {
398 struct xgbe_channel *channel = data;
399
400 /* Per channel DMA interrupts are enabled, so we use the per
401 * channel napi structure and not the private data napi structure
402 */
403 if (napi_schedule_prep(&channel->napi)) {
404 /* Disable Tx and Rx interrupts */
405 disable_irq_nosync(channel->dma_irq);
406
407 /* Turn on polling */
408 __napi_schedule(&channel->napi);
409 }
410
411 return IRQ_HANDLED;
412 }
413
414 static enum hrtimer_restart xgbe_tx_timer(struct hrtimer *timer)
415 {
416 struct xgbe_channel *channel = container_of(timer,
417 struct xgbe_channel,
418 tx_timer);
419 struct xgbe_prv_data *pdata = channel->pdata;
420 struct napi_struct *napi;
421
422 DBGPR("-->xgbe_tx_timer\n");
423
424 napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
425
426 if (napi_schedule_prep(napi)) {
427 /* Disable Tx and Rx interrupts */
428 if (pdata->per_channel_irq)
429 disable_irq(channel->dma_irq);
430 else
431 xgbe_disable_rx_tx_ints(pdata);
432
433 /* Turn on polling */
434 __napi_schedule(napi);
435 }
436
437 channel->tx_timer_active = 0;
438
439 DBGPR("<--xgbe_tx_timer\n");
440
441 return HRTIMER_NORESTART;
442 }
443
444 static void xgbe_init_tx_timers(struct xgbe_prv_data *pdata)
445 {
446 struct xgbe_channel *channel;
447 unsigned int i;
448
449 DBGPR("-->xgbe_init_tx_timers\n");
450
451 channel = pdata->channel;
452 for (i = 0; i < pdata->channel_count; i++, channel++) {
453 if (!channel->tx_ring)
454 break;
455
456 DBGPR(" %s adding tx timer\n", channel->name);
457 hrtimer_init(&channel->tx_timer, CLOCK_MONOTONIC,
458 HRTIMER_MODE_REL);
459 channel->tx_timer.function = xgbe_tx_timer;
460 }
461
462 DBGPR("<--xgbe_init_tx_timers\n");
463 }
464
465 static void xgbe_stop_tx_timers(struct xgbe_prv_data *pdata)
466 {
467 struct xgbe_channel *channel;
468 unsigned int i;
469
470 DBGPR("-->xgbe_stop_tx_timers\n");
471
472 channel = pdata->channel;
473 for (i = 0; i < pdata->channel_count; i++, channel++) {
474 if (!channel->tx_ring)
475 break;
476
477 DBGPR(" %s deleting tx timer\n", channel->name);
478 channel->tx_timer_active = 0;
479 hrtimer_cancel(&channel->tx_timer);
480 }
481
482 DBGPR("<--xgbe_stop_tx_timers\n");
483 }
484
485 void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata)
486 {
487 unsigned int mac_hfr0, mac_hfr1, mac_hfr2;
488 struct xgbe_hw_features *hw_feat = &pdata->hw_feat;
489
490 DBGPR("-->xgbe_get_all_hw_features\n");
491
492 mac_hfr0 = XGMAC_IOREAD(pdata, MAC_HWF0R);
493 mac_hfr1 = XGMAC_IOREAD(pdata, MAC_HWF1R);
494 mac_hfr2 = XGMAC_IOREAD(pdata, MAC_HWF2R);
495
496 memset(hw_feat, 0, sizeof(*hw_feat));
497
498 hw_feat->version = XGMAC_IOREAD(pdata, MAC_VR);
499
500 /* Hardware feature register 0 */
501 hw_feat->gmii = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, GMIISEL);
502 hw_feat->vlhash = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VLHASH);
503 hw_feat->sma = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SMASEL);
504 hw_feat->rwk = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RWKSEL);
505 hw_feat->mgk = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MGKSEL);
506 hw_feat->mmc = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MMCSEL);
507 hw_feat->aoe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, ARPOFFSEL);
508 hw_feat->ts = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSEL);
509 hw_feat->eee = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, EEESEL);
510 hw_feat->tx_coe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TXCOESEL);
511 hw_feat->rx_coe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RXCOESEL);
512 hw_feat->addn_mac = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R,
513 ADDMACADRSEL);
514 hw_feat->ts_src = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSTSSEL);
515 hw_feat->sa_vlan_ins = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SAVLANINS);
516
517 /* Hardware feature register 1 */
518 hw_feat->rx_fifo_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
519 RXFIFOSIZE);
520 hw_feat->tx_fifo_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
521 TXFIFOSIZE);
522 hw_feat->dcb = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DCBEN);
523 hw_feat->sph = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, SPHEN);
524 hw_feat->tso = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, TSOEN);
525 hw_feat->dma_debug = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DBGMEMA);
526 hw_feat->rss = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, RSSEN);
527 hw_feat->tc_cnt = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, NUMTC);
528 hw_feat->hash_table_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
529 HASHTBLSZ);
530 hw_feat->l3l4_filter_num = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
531 L3L4FNUM);
532
533 /* Hardware feature register 2 */
534 hw_feat->rx_q_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXQCNT);
535 hw_feat->tx_q_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXQCNT);
536 hw_feat->rx_ch_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXCHCNT);
537 hw_feat->tx_ch_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXCHCNT);
538 hw_feat->pps_out_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, PPSOUTNUM);
539 hw_feat->aux_snap_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, AUXSNAPNUM);
540
541 /* Translate the Hash Table size into actual number */
542 switch (hw_feat->hash_table_size) {
543 case 0:
544 break;
545 case 1:
546 hw_feat->hash_table_size = 64;
547 break;
548 case 2:
549 hw_feat->hash_table_size = 128;
550 break;
551 case 3:
552 hw_feat->hash_table_size = 256;
553 break;
554 }
555
556 /* The Queue, Channel and TC counts are zero based so increment them
557 * to get the actual number
558 */
559 hw_feat->rx_q_cnt++;
560 hw_feat->tx_q_cnt++;
561 hw_feat->rx_ch_cnt++;
562 hw_feat->tx_ch_cnt++;
563 hw_feat->tc_cnt++;
564
565 DBGPR("<--xgbe_get_all_hw_features\n");
566 }
567
568 static void xgbe_napi_enable(struct xgbe_prv_data *pdata, unsigned int add)
569 {
570 struct xgbe_channel *channel;
571 unsigned int i;
572
573 if (pdata->per_channel_irq) {
574 channel = pdata->channel;
575 for (i = 0; i < pdata->channel_count; i++, channel++) {
576 if (add)
577 netif_napi_add(pdata->netdev, &channel->napi,
578 xgbe_one_poll, NAPI_POLL_WEIGHT);
579
580 napi_enable(&channel->napi);
581 }
582 } else {
583 if (add)
584 netif_napi_add(pdata->netdev, &pdata->napi,
585 xgbe_all_poll, NAPI_POLL_WEIGHT);
586
587 napi_enable(&pdata->napi);
588 }
589 }
590
591 static void xgbe_napi_disable(struct xgbe_prv_data *pdata, unsigned int del)
592 {
593 struct xgbe_channel *channel;
594 unsigned int i;
595
596 if (pdata->per_channel_irq) {
597 channel = pdata->channel;
598 for (i = 0; i < pdata->channel_count; i++, channel++) {
599 napi_disable(&channel->napi);
600
601 if (del)
602 netif_napi_del(&channel->napi);
603 }
604 } else {
605 napi_disable(&pdata->napi);
606
607 if (del)
608 netif_napi_del(&pdata->napi);
609 }
610 }
611
612 static int xgbe_request_irqs(struct xgbe_prv_data *pdata)
613 {
614 struct xgbe_channel *channel;
615 struct net_device *netdev = pdata->netdev;
616 unsigned int i;
617 int ret;
618
619 ret = devm_request_irq(pdata->dev, pdata->dev_irq, xgbe_isr, 0,
620 netdev->name, pdata);
621 if (ret) {
622 netdev_alert(netdev, "error requesting irq %d\n",
623 pdata->dev_irq);
624 return ret;
625 }
626
627 if (!pdata->per_channel_irq)
628 return 0;
629
630 channel = pdata->channel;
631 for (i = 0; i < pdata->channel_count; i++, channel++) {
632 snprintf(channel->dma_irq_name,
633 sizeof(channel->dma_irq_name) - 1,
634 "%s-TxRx-%u", netdev_name(netdev),
635 channel->queue_index);
636
637 ret = devm_request_irq(pdata->dev, channel->dma_irq,
638 xgbe_dma_isr, 0,
639 channel->dma_irq_name, channel);
640 if (ret) {
641 netdev_alert(netdev, "error requesting irq %d\n",
642 channel->dma_irq);
643 goto err_irq;
644 }
645 }
646
647 return 0;
648
649 err_irq:
650 /* Using an unsigned int, 'i' will go to UINT_MAX and exit */
651 for (i--, channel--; i < pdata->channel_count; i--, channel--)
652 devm_free_irq(pdata->dev, channel->dma_irq, channel);
653
654 devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
655
656 return ret;
657 }
658
659 static void xgbe_free_irqs(struct xgbe_prv_data *pdata)
660 {
661 struct xgbe_channel *channel;
662 unsigned int i;
663
664 devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
665
666 if (!pdata->per_channel_irq)
667 return;
668
669 channel = pdata->channel;
670 for (i = 0; i < pdata->channel_count; i++, channel++)
671 devm_free_irq(pdata->dev, channel->dma_irq, channel);
672 }
673
674 void xgbe_init_tx_coalesce(struct xgbe_prv_data *pdata)
675 {
676 struct xgbe_hw_if *hw_if = &pdata->hw_if;
677
678 DBGPR("-->xgbe_init_tx_coalesce\n");
679
680 pdata->tx_usecs = XGMAC_INIT_DMA_TX_USECS;
681 pdata->tx_frames = XGMAC_INIT_DMA_TX_FRAMES;
682
683 hw_if->config_tx_coalesce(pdata);
684
685 DBGPR("<--xgbe_init_tx_coalesce\n");
686 }
687
688 void xgbe_init_rx_coalesce(struct xgbe_prv_data *pdata)
689 {
690 struct xgbe_hw_if *hw_if = &pdata->hw_if;
691
692 DBGPR("-->xgbe_init_rx_coalesce\n");
693
694 pdata->rx_riwt = hw_if->usec_to_riwt(pdata, XGMAC_INIT_DMA_RX_USECS);
695 pdata->rx_frames = XGMAC_INIT_DMA_RX_FRAMES;
696
697 hw_if->config_rx_coalesce(pdata);
698
699 DBGPR("<--xgbe_init_rx_coalesce\n");
700 }
701
702 static void xgbe_free_tx_data(struct xgbe_prv_data *pdata)
703 {
704 struct xgbe_desc_if *desc_if = &pdata->desc_if;
705 struct xgbe_channel *channel;
706 struct xgbe_ring *ring;
707 struct xgbe_ring_data *rdata;
708 unsigned int i, j;
709
710 DBGPR("-->xgbe_free_tx_data\n");
711
712 channel = pdata->channel;
713 for (i = 0; i < pdata->channel_count; i++, channel++) {
714 ring = channel->tx_ring;
715 if (!ring)
716 break;
717
718 for (j = 0; j < ring->rdesc_count; j++) {
719 rdata = XGBE_GET_DESC_DATA(ring, j);
720 desc_if->unmap_rdata(pdata, rdata);
721 }
722 }
723
724 DBGPR("<--xgbe_free_tx_data\n");
725 }
726
727 static void xgbe_free_rx_data(struct xgbe_prv_data *pdata)
728 {
729 struct xgbe_desc_if *desc_if = &pdata->desc_if;
730 struct xgbe_channel *channel;
731 struct xgbe_ring *ring;
732 struct xgbe_ring_data *rdata;
733 unsigned int i, j;
734
735 DBGPR("-->xgbe_free_rx_data\n");
736
737 channel = pdata->channel;
738 for (i = 0; i < pdata->channel_count; i++, channel++) {
739 ring = channel->rx_ring;
740 if (!ring)
741 break;
742
743 for (j = 0; j < ring->rdesc_count; j++) {
744 rdata = XGBE_GET_DESC_DATA(ring, j);
745 desc_if->unmap_rdata(pdata, rdata);
746 }
747 }
748
749 DBGPR("<--xgbe_free_rx_data\n");
750 }
751
752 static void xgbe_adjust_link(struct net_device *netdev)
753 {
754 struct xgbe_prv_data *pdata = netdev_priv(netdev);
755 struct xgbe_hw_if *hw_if = &pdata->hw_if;
756 struct phy_device *phydev = pdata->phydev;
757 int new_state = 0;
758
759 if (!phydev)
760 return;
761
762 if (phydev->link) {
763 /* Flow control support */
764 if (pdata->pause_autoneg) {
765 if (phydev->pause || phydev->asym_pause) {
766 pdata->tx_pause = 1;
767 pdata->rx_pause = 1;
768 } else {
769 pdata->tx_pause = 0;
770 pdata->rx_pause = 0;
771 }
772 }
773
774 if (pdata->tx_pause != pdata->phy_tx_pause) {
775 hw_if->config_tx_flow_control(pdata);
776 pdata->phy_tx_pause = pdata->tx_pause;
777 }
778
779 if (pdata->rx_pause != pdata->phy_rx_pause) {
780 hw_if->config_rx_flow_control(pdata);
781 pdata->phy_rx_pause = pdata->rx_pause;
782 }
783
784 /* Speed support */
785 if (phydev->speed != pdata->phy_speed) {
786 new_state = 1;
787
788 switch (phydev->speed) {
789 case SPEED_10000:
790 hw_if->set_xgmii_speed(pdata);
791 break;
792
793 case SPEED_2500:
794 hw_if->set_gmii_2500_speed(pdata);
795 break;
796
797 case SPEED_1000:
798 hw_if->set_gmii_speed(pdata);
799 break;
800 }
801 pdata->phy_speed = phydev->speed;
802 }
803
804 if (phydev->link != pdata->phy_link) {
805 new_state = 1;
806 pdata->phy_link = 1;
807 }
808 } else if (pdata->phy_link) {
809 new_state = 1;
810 pdata->phy_link = 0;
811 pdata->phy_speed = SPEED_UNKNOWN;
812 }
813
814 if (new_state)
815 phy_print_status(phydev);
816 }
817
818 static int xgbe_phy_init(struct xgbe_prv_data *pdata)
819 {
820 struct net_device *netdev = pdata->netdev;
821 struct phy_device *phydev = pdata->phydev;
822 int ret;
823
824 pdata->phy_link = -1;
825 pdata->phy_speed = SPEED_UNKNOWN;
826 pdata->phy_tx_pause = pdata->tx_pause;
827 pdata->phy_rx_pause = pdata->rx_pause;
828
829 ret = phy_connect_direct(netdev, phydev, &xgbe_adjust_link,
830 pdata->phy_mode);
831 if (ret) {
832 netdev_err(netdev, "phy_connect_direct failed\n");
833 return ret;
834 }
835
836 if (!phydev->drv || (phydev->drv->phy_id == 0)) {
837 netdev_err(netdev, "phy_id not valid\n");
838 ret = -ENODEV;
839 goto err_phy_connect;
840 }
841 DBGPR(" phy_connect_direct succeeded for PHY %s, link=%d\n",
842 dev_name(&phydev->dev), phydev->link);
843
844 return 0;
845
846 err_phy_connect:
847 phy_disconnect(phydev);
848
849 return ret;
850 }
851
852 static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
853 {
854 if (!pdata->phydev)
855 return;
856
857 phy_disconnect(pdata->phydev);
858 }
859
860 int xgbe_powerdown(struct net_device *netdev, unsigned int caller)
861 {
862 struct xgbe_prv_data *pdata = netdev_priv(netdev);
863 struct xgbe_hw_if *hw_if = &pdata->hw_if;
864 unsigned long flags;
865
866 DBGPR("-->xgbe_powerdown\n");
867
868 if (!netif_running(netdev) ||
869 (caller == XGMAC_IOCTL_CONTEXT && pdata->power_down)) {
870 netdev_alert(netdev, "Device is already powered down\n");
871 DBGPR("<--xgbe_powerdown\n");
872 return -EINVAL;
873 }
874
875 spin_lock_irqsave(&pdata->lock, flags);
876
877 if (caller == XGMAC_DRIVER_CONTEXT)
878 netif_device_detach(netdev);
879
880 netif_tx_stop_all_queues(netdev);
881
882 hw_if->powerdown_tx(pdata);
883 hw_if->powerdown_rx(pdata);
884
885 xgbe_napi_disable(pdata, 0);
886
887 phy_stop(pdata->phydev);
888
889 pdata->power_down = 1;
890
891 spin_unlock_irqrestore(&pdata->lock, flags);
892
893 DBGPR("<--xgbe_powerdown\n");
894
895 return 0;
896 }
897
898 int xgbe_powerup(struct net_device *netdev, unsigned int caller)
899 {
900 struct xgbe_prv_data *pdata = netdev_priv(netdev);
901 struct xgbe_hw_if *hw_if = &pdata->hw_if;
902 unsigned long flags;
903
904 DBGPR("-->xgbe_powerup\n");
905
906 if (!netif_running(netdev) ||
907 (caller == XGMAC_IOCTL_CONTEXT && !pdata->power_down)) {
908 netdev_alert(netdev, "Device is already powered up\n");
909 DBGPR("<--xgbe_powerup\n");
910 return -EINVAL;
911 }
912
913 spin_lock_irqsave(&pdata->lock, flags);
914
915 pdata->power_down = 0;
916
917 phy_start(pdata->phydev);
918
919 xgbe_napi_enable(pdata, 0);
920
921 hw_if->powerup_tx(pdata);
922 hw_if->powerup_rx(pdata);
923
924 if (caller == XGMAC_DRIVER_CONTEXT)
925 netif_device_attach(netdev);
926
927 netif_tx_start_all_queues(netdev);
928
929 spin_unlock_irqrestore(&pdata->lock, flags);
930
931 DBGPR("<--xgbe_powerup\n");
932
933 return 0;
934 }
935
936 static int xgbe_start(struct xgbe_prv_data *pdata)
937 {
938 struct xgbe_hw_if *hw_if = &pdata->hw_if;
939 struct net_device *netdev = pdata->netdev;
940 int ret;
941
942 DBGPR("-->xgbe_start\n");
943
944 xgbe_set_rx_mode(netdev);
945
946 hw_if->init(pdata);
947
948 phy_start(pdata->phydev);
949
950 xgbe_napi_enable(pdata, 1);
951
952 ret = xgbe_request_irqs(pdata);
953 if (ret)
954 goto err_napi;
955
956 hw_if->enable_tx(pdata);
957 hw_if->enable_rx(pdata);
958
959 xgbe_init_tx_timers(pdata);
960
961 netif_tx_start_all_queues(netdev);
962
963 DBGPR("<--xgbe_start\n");
964
965 return 0;
966
967 err_napi:
968 xgbe_napi_disable(pdata, 1);
969
970 phy_stop(pdata->phydev);
971
972 hw_if->exit(pdata);
973
974 return ret;
975 }
976
977 static void xgbe_stop(struct xgbe_prv_data *pdata)
978 {
979 struct xgbe_hw_if *hw_if = &pdata->hw_if;
980 struct xgbe_channel *channel;
981 struct net_device *netdev = pdata->netdev;
982 struct netdev_queue *txq;
983 unsigned int i;
984
985 DBGPR("-->xgbe_stop\n");
986
987 netif_tx_stop_all_queues(netdev);
988
989 xgbe_stop_tx_timers(pdata);
990
991 hw_if->disable_tx(pdata);
992 hw_if->disable_rx(pdata);
993
994 xgbe_free_irqs(pdata);
995
996 xgbe_napi_disable(pdata, 1);
997
998 phy_stop(pdata->phydev);
999
1000 hw_if->exit(pdata);
1001
1002 channel = pdata->channel;
1003 for (i = 0; i < pdata->channel_count; i++, channel++) {
1004 if (!channel->tx_ring)
1005 continue;
1006
1007 txq = netdev_get_tx_queue(netdev, channel->queue_index);
1008 netdev_tx_reset_queue(txq);
1009 }
1010
1011 DBGPR("<--xgbe_stop\n");
1012 }
1013
1014 static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
1015 {
1016 DBGPR("-->xgbe_restart_dev\n");
1017
1018 /* If not running, "restart" will happen on open */
1019 if (!netif_running(pdata->netdev))
1020 return;
1021
1022 xgbe_stop(pdata);
1023
1024 xgbe_free_tx_data(pdata);
1025 xgbe_free_rx_data(pdata);
1026
1027 xgbe_start(pdata);
1028
1029 DBGPR("<--xgbe_restart_dev\n");
1030 }
1031
1032 static void xgbe_restart(struct work_struct *work)
1033 {
1034 struct xgbe_prv_data *pdata = container_of(work,
1035 struct xgbe_prv_data,
1036 restart_work);
1037
1038 rtnl_lock();
1039
1040 xgbe_restart_dev(pdata);
1041
1042 rtnl_unlock();
1043 }
1044
1045 static void xgbe_tx_tstamp(struct work_struct *work)
1046 {
1047 struct xgbe_prv_data *pdata = container_of(work,
1048 struct xgbe_prv_data,
1049 tx_tstamp_work);
1050 struct skb_shared_hwtstamps hwtstamps;
1051 u64 nsec;
1052 unsigned long flags;
1053
1054 if (pdata->tx_tstamp) {
1055 nsec = timecounter_cyc2time(&pdata->tstamp_tc,
1056 pdata->tx_tstamp);
1057
1058 memset(&hwtstamps, 0, sizeof(hwtstamps));
1059 hwtstamps.hwtstamp = ns_to_ktime(nsec);
1060 skb_tstamp_tx(pdata->tx_tstamp_skb, &hwtstamps);
1061 }
1062
1063 dev_kfree_skb_any(pdata->tx_tstamp_skb);
1064
1065 spin_lock_irqsave(&pdata->tstamp_lock, flags);
1066 pdata->tx_tstamp_skb = NULL;
1067 spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1068 }
1069
1070 static int xgbe_get_hwtstamp_settings(struct xgbe_prv_data *pdata,
1071 struct ifreq *ifreq)
1072 {
1073 if (copy_to_user(ifreq->ifr_data, &pdata->tstamp_config,
1074 sizeof(pdata->tstamp_config)))
1075 return -EFAULT;
1076
1077 return 0;
1078 }
1079
1080 static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
1081 struct ifreq *ifreq)
1082 {
1083 struct hwtstamp_config config;
1084 unsigned int mac_tscr;
1085
1086 if (copy_from_user(&config, ifreq->ifr_data, sizeof(config)))
1087 return -EFAULT;
1088
1089 if (config.flags)
1090 return -EINVAL;
1091
1092 mac_tscr = 0;
1093
1094 switch (config.tx_type) {
1095 case HWTSTAMP_TX_OFF:
1096 break;
1097
1098 case HWTSTAMP_TX_ON:
1099 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1100 break;
1101
1102 default:
1103 return -ERANGE;
1104 }
1105
1106 switch (config.rx_filter) {
1107 case HWTSTAMP_FILTER_NONE:
1108 break;
1109
1110 case HWTSTAMP_FILTER_ALL:
1111 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1);
1112 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1113 break;
1114
1115 /* PTP v2, UDP, any kind of event packet */
1116 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1117 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1118 /* PTP v1, UDP, any kind of event packet */
1119 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1120 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1121 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1122 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1123 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1124 break;
1125
1126 /* PTP v2, UDP, Sync packet */
1127 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1128 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1129 /* PTP v1, UDP, Sync packet */
1130 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1131 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1132 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1133 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1134 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1135 break;
1136
1137 /* PTP v2, UDP, Delay_req packet */
1138 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1139 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1140 /* PTP v1, UDP, Delay_req packet */
1141 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1142 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1143 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1144 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1145 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1146 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1147 break;
1148
1149 /* 802.AS1, Ethernet, any kind of event packet */
1150 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1151 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1152 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1153 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1154 break;
1155
1156 /* 802.AS1, Ethernet, Sync packet */
1157 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1158 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1159 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1160 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1161 break;
1162
1163 /* 802.AS1, Ethernet, Delay_req packet */
1164 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1165 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1166 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1167 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1168 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1169 break;
1170
1171 /* PTP v2/802.AS1, any layer, any kind of event packet */
1172 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1173 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1174 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1175 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1176 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1177 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1178 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1179 break;
1180
1181 /* PTP v2/802.AS1, any layer, Sync packet */
1182 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1183 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1184 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1185 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1186 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1187 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1188 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1189 break;
1190
1191 /* PTP v2/802.AS1, any layer, Delay_req packet */
1192 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1193 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1194 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1195 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1196 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1197 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1198 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1199 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1200 break;
1201
1202 default:
1203 return -ERANGE;
1204 }
1205
1206 pdata->hw_if.config_tstamp(pdata, mac_tscr);
1207
1208 memcpy(&pdata->tstamp_config, &config, sizeof(config));
1209
1210 return 0;
1211 }
1212
1213 static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
1214 struct sk_buff *skb,
1215 struct xgbe_packet_data *packet)
1216 {
1217 unsigned long flags;
1218
1219 if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) {
1220 spin_lock_irqsave(&pdata->tstamp_lock, flags);
1221 if (pdata->tx_tstamp_skb) {
1222 /* Another timestamp in progress, ignore this one */
1223 XGMAC_SET_BITS(packet->attributes,
1224 TX_PACKET_ATTRIBUTES, PTP, 0);
1225 } else {
1226 pdata->tx_tstamp_skb = skb_get(skb);
1227 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1228 }
1229 spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1230 }
1231
1232 if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP))
1233 skb_tx_timestamp(skb);
1234 }
1235
1236 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
1237 {
1238 if (skb_vlan_tag_present(skb))
1239 packet->vlan_ctag = skb_vlan_tag_get(skb);
1240 }
1241
1242 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
1243 {
1244 int ret;
1245
1246 if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1247 TSO_ENABLE))
1248 return 0;
1249
1250 ret = skb_cow_head(skb, 0);
1251 if (ret)
1252 return ret;
1253
1254 packet->header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1255 packet->tcp_header_len = tcp_hdrlen(skb);
1256 packet->tcp_payload_len = skb->len - packet->header_len;
1257 packet->mss = skb_shinfo(skb)->gso_size;
1258 DBGPR(" packet->header_len=%u\n", packet->header_len);
1259 DBGPR(" packet->tcp_header_len=%u, packet->tcp_payload_len=%u\n",
1260 packet->tcp_header_len, packet->tcp_payload_len);
1261 DBGPR(" packet->mss=%u\n", packet->mss);
1262
1263 /* Update the number of packets that will ultimately be transmitted
1264 * along with the extra bytes for each extra packet
1265 */
1266 packet->tx_packets = skb_shinfo(skb)->gso_segs;
1267 packet->tx_bytes += (packet->tx_packets - 1) * packet->header_len;
1268
1269 return 0;
1270 }
1271
1272 static int xgbe_is_tso(struct sk_buff *skb)
1273 {
1274 if (skb->ip_summed != CHECKSUM_PARTIAL)
1275 return 0;
1276
1277 if (!skb_is_gso(skb))
1278 return 0;
1279
1280 DBGPR(" TSO packet to be processed\n");
1281
1282 return 1;
1283 }
1284
1285 static void xgbe_packet_info(struct xgbe_prv_data *pdata,
1286 struct xgbe_ring *ring, struct sk_buff *skb,
1287 struct xgbe_packet_data *packet)
1288 {
1289 struct skb_frag_struct *frag;
1290 unsigned int context_desc;
1291 unsigned int len;
1292 unsigned int i;
1293
1294 packet->skb = skb;
1295
1296 context_desc = 0;
1297 packet->rdesc_count = 0;
1298
1299 packet->tx_packets = 1;
1300 packet->tx_bytes = skb->len;
1301
1302 if (xgbe_is_tso(skb)) {
1303 /* TSO requires an extra descriptor if mss is different */
1304 if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
1305 context_desc = 1;
1306 packet->rdesc_count++;
1307 }
1308
1309 /* TSO requires an extra descriptor for TSO header */
1310 packet->rdesc_count++;
1311
1312 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1313 TSO_ENABLE, 1);
1314 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1315 CSUM_ENABLE, 1);
1316 } else if (skb->ip_summed == CHECKSUM_PARTIAL)
1317 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1318 CSUM_ENABLE, 1);
1319
1320 if (skb_vlan_tag_present(skb)) {
1321 /* VLAN requires an extra descriptor if tag is different */
1322 if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
1323 /* We can share with the TSO context descriptor */
1324 if (!context_desc) {
1325 context_desc = 1;
1326 packet->rdesc_count++;
1327 }
1328
1329 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1330 VLAN_CTAG, 1);
1331 }
1332
1333 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1334 (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON))
1335 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1336 PTP, 1);
1337
1338 for (len = skb_headlen(skb); len;) {
1339 packet->rdesc_count++;
1340 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1341 }
1342
1343 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1344 frag = &skb_shinfo(skb)->frags[i];
1345 for (len = skb_frag_size(frag); len; ) {
1346 packet->rdesc_count++;
1347 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1348 }
1349 }
1350 }
1351
1352 static int xgbe_open(struct net_device *netdev)
1353 {
1354 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1355 struct xgbe_desc_if *desc_if = &pdata->desc_if;
1356 int ret;
1357
1358 DBGPR("-->xgbe_open\n");
1359
1360 /* Initialize the phy */
1361 ret = xgbe_phy_init(pdata);
1362 if (ret)
1363 return ret;
1364
1365 /* Enable the clocks */
1366 ret = clk_prepare_enable(pdata->sysclk);
1367 if (ret) {
1368 netdev_alert(netdev, "dma clk_prepare_enable failed\n");
1369 goto err_phy_init;
1370 }
1371
1372 ret = clk_prepare_enable(pdata->ptpclk);
1373 if (ret) {
1374 netdev_alert(netdev, "ptp clk_prepare_enable failed\n");
1375 goto err_sysclk;
1376 }
1377
1378 /* Calculate the Rx buffer size before allocating rings */
1379 ret = xgbe_calc_rx_buf_size(netdev, netdev->mtu);
1380 if (ret < 0)
1381 goto err_ptpclk;
1382 pdata->rx_buf_size = ret;
1383
1384 /* Allocate the channel and ring structures */
1385 ret = xgbe_alloc_channels(pdata);
1386 if (ret)
1387 goto err_ptpclk;
1388
1389 /* Allocate the ring descriptors and buffers */
1390 ret = desc_if->alloc_ring_resources(pdata);
1391 if (ret)
1392 goto err_channels;
1393
1394 /* Initialize the device restart and Tx timestamp work struct */
1395 INIT_WORK(&pdata->restart_work, xgbe_restart);
1396 INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp);
1397
1398 ret = xgbe_start(pdata);
1399 if (ret)
1400 goto err_rings;
1401
1402 DBGPR("<--xgbe_open\n");
1403
1404 return 0;
1405
1406 err_rings:
1407 desc_if->free_ring_resources(pdata);
1408
1409 err_channels:
1410 xgbe_free_channels(pdata);
1411
1412 err_ptpclk:
1413 clk_disable_unprepare(pdata->ptpclk);
1414
1415 err_sysclk:
1416 clk_disable_unprepare(pdata->sysclk);
1417
1418 err_phy_init:
1419 xgbe_phy_exit(pdata);
1420
1421 return ret;
1422 }
1423
1424 static int xgbe_close(struct net_device *netdev)
1425 {
1426 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1427 struct xgbe_desc_if *desc_if = &pdata->desc_if;
1428
1429 DBGPR("-->xgbe_close\n");
1430
1431 /* Stop the device */
1432 xgbe_stop(pdata);
1433
1434 /* Free the ring descriptors and buffers */
1435 desc_if->free_ring_resources(pdata);
1436
1437 /* Free the channel and ring structures */
1438 xgbe_free_channels(pdata);
1439
1440 /* Disable the clocks */
1441 clk_disable_unprepare(pdata->ptpclk);
1442 clk_disable_unprepare(pdata->sysclk);
1443
1444 /* Release the phy */
1445 xgbe_phy_exit(pdata);
1446
1447 DBGPR("<--xgbe_close\n");
1448
1449 return 0;
1450 }
1451
1452 static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
1453 {
1454 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1455 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1456 struct xgbe_desc_if *desc_if = &pdata->desc_if;
1457 struct xgbe_channel *channel;
1458 struct xgbe_ring *ring;
1459 struct xgbe_packet_data *packet;
1460 struct netdev_queue *txq;
1461 int ret;
1462
1463 DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
1464
1465 channel = pdata->channel + skb->queue_mapping;
1466 txq = netdev_get_tx_queue(netdev, channel->queue_index);
1467 ring = channel->tx_ring;
1468 packet = &ring->packet_data;
1469
1470 ret = NETDEV_TX_OK;
1471
1472 if (skb->len == 0) {
1473 netdev_err(netdev, "empty skb received from stack\n");
1474 dev_kfree_skb_any(skb);
1475 goto tx_netdev_return;
1476 }
1477
1478 /* Calculate preliminary packet info */
1479 memset(packet, 0, sizeof(*packet));
1480 xgbe_packet_info(pdata, ring, skb, packet);
1481
1482 /* Check that there are enough descriptors available */
1483 ret = xgbe_maybe_stop_tx_queue(channel, ring, packet->rdesc_count);
1484 if (ret)
1485 goto tx_netdev_return;
1486
1487 ret = xgbe_prep_tso(skb, packet);
1488 if (ret) {
1489 netdev_err(netdev, "error processing TSO packet\n");
1490 dev_kfree_skb_any(skb);
1491 goto tx_netdev_return;
1492 }
1493 xgbe_prep_vlan(skb, packet);
1494
1495 if (!desc_if->map_tx_skb(channel, skb)) {
1496 dev_kfree_skb_any(skb);
1497 goto tx_netdev_return;
1498 }
1499
1500 xgbe_prep_tx_tstamp(pdata, skb, packet);
1501
1502 /* Report on the actual number of bytes (to be) sent */
1503 netdev_tx_sent_queue(txq, packet->tx_bytes);
1504
1505 /* Configure required descriptor fields for transmission */
1506 hw_if->dev_xmit(channel);
1507
1508 #ifdef XGMAC_ENABLE_TX_PKT_DUMP
1509 xgbe_print_pkt(netdev, skb, true);
1510 #endif
1511
1512 /* Stop the queue in advance if there may not be enough descriptors */
1513 xgbe_maybe_stop_tx_queue(channel, ring, XGBE_TX_MAX_DESCS);
1514
1515 ret = NETDEV_TX_OK;
1516
1517 tx_netdev_return:
1518 return ret;
1519 }
1520
1521 static void xgbe_set_rx_mode(struct net_device *netdev)
1522 {
1523 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1524 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1525 unsigned int pr_mode, am_mode;
1526
1527 DBGPR("-->xgbe_set_rx_mode\n");
1528
1529 pr_mode = ((netdev->flags & IFF_PROMISC) != 0);
1530 am_mode = ((netdev->flags & IFF_ALLMULTI) != 0);
1531
1532 hw_if->set_promiscuous_mode(pdata, pr_mode);
1533 hw_if->set_all_multicast_mode(pdata, am_mode);
1534
1535 hw_if->add_mac_addresses(pdata);
1536
1537 DBGPR("<--xgbe_set_rx_mode\n");
1538 }
1539
1540 static int xgbe_set_mac_address(struct net_device *netdev, void *addr)
1541 {
1542 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1543 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1544 struct sockaddr *saddr = addr;
1545
1546 DBGPR("-->xgbe_set_mac_address\n");
1547
1548 if (!is_valid_ether_addr(saddr->sa_data))
1549 return -EADDRNOTAVAIL;
1550
1551 memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len);
1552
1553 hw_if->set_mac_address(pdata, netdev->dev_addr);
1554
1555 DBGPR("<--xgbe_set_mac_address\n");
1556
1557 return 0;
1558 }
1559
1560 static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd)
1561 {
1562 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1563 int ret;
1564
1565 switch (cmd) {
1566 case SIOCGHWTSTAMP:
1567 ret = xgbe_get_hwtstamp_settings(pdata, ifreq);
1568 break;
1569
1570 case SIOCSHWTSTAMP:
1571 ret = xgbe_set_hwtstamp_settings(pdata, ifreq);
1572 break;
1573
1574 default:
1575 ret = -EOPNOTSUPP;
1576 }
1577
1578 return ret;
1579 }
1580
1581 static int xgbe_change_mtu(struct net_device *netdev, int mtu)
1582 {
1583 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1584 int ret;
1585
1586 DBGPR("-->xgbe_change_mtu\n");
1587
1588 ret = xgbe_calc_rx_buf_size(netdev, mtu);
1589 if (ret < 0)
1590 return ret;
1591
1592 pdata->rx_buf_size = ret;
1593 netdev->mtu = mtu;
1594
1595 xgbe_restart_dev(pdata);
1596
1597 DBGPR("<--xgbe_change_mtu\n");
1598
1599 return 0;
1600 }
1601
1602 static struct rtnl_link_stats64 *xgbe_get_stats64(struct net_device *netdev,
1603 struct rtnl_link_stats64 *s)
1604 {
1605 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1606 struct xgbe_mmc_stats *pstats = &pdata->mmc_stats;
1607
1608 DBGPR("-->%s\n", __func__);
1609
1610 pdata->hw_if.read_mmc_stats(pdata);
1611
1612 s->rx_packets = pstats->rxframecount_gb;
1613 s->rx_bytes = pstats->rxoctetcount_gb;
1614 s->rx_errors = pstats->rxframecount_gb -
1615 pstats->rxbroadcastframes_g -
1616 pstats->rxmulticastframes_g -
1617 pstats->rxunicastframes_g;
1618 s->multicast = pstats->rxmulticastframes_g;
1619 s->rx_length_errors = pstats->rxlengtherror;
1620 s->rx_crc_errors = pstats->rxcrcerror;
1621 s->rx_fifo_errors = pstats->rxfifooverflow;
1622
1623 s->tx_packets = pstats->txframecount_gb;
1624 s->tx_bytes = pstats->txoctetcount_gb;
1625 s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
1626 s->tx_dropped = netdev->stats.tx_dropped;
1627
1628 DBGPR("<--%s\n", __func__);
1629
1630 return s;
1631 }
1632
1633 static int xgbe_vlan_rx_add_vid(struct net_device *netdev, __be16 proto,
1634 u16 vid)
1635 {
1636 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1637 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1638
1639 DBGPR("-->%s\n", __func__);
1640
1641 set_bit(vid, pdata->active_vlans);
1642 hw_if->update_vlan_hash_table(pdata);
1643
1644 DBGPR("<--%s\n", __func__);
1645
1646 return 0;
1647 }
1648
1649 static int xgbe_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto,
1650 u16 vid)
1651 {
1652 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1653 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1654
1655 DBGPR("-->%s\n", __func__);
1656
1657 clear_bit(vid, pdata->active_vlans);
1658 hw_if->update_vlan_hash_table(pdata);
1659
1660 DBGPR("<--%s\n", __func__);
1661
1662 return 0;
1663 }
1664
1665 #ifdef CONFIG_NET_POLL_CONTROLLER
1666 static void xgbe_poll_controller(struct net_device *netdev)
1667 {
1668 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1669 struct xgbe_channel *channel;
1670 unsigned int i;
1671
1672 DBGPR("-->xgbe_poll_controller\n");
1673
1674 if (pdata->per_channel_irq) {
1675 channel = pdata->channel;
1676 for (i = 0; i < pdata->channel_count; i++, channel++)
1677 xgbe_dma_isr(channel->dma_irq, channel);
1678 } else {
1679 disable_irq(pdata->dev_irq);
1680 xgbe_isr(pdata->dev_irq, pdata);
1681 enable_irq(pdata->dev_irq);
1682 }
1683
1684 DBGPR("<--xgbe_poll_controller\n");
1685 }
1686 #endif /* End CONFIG_NET_POLL_CONTROLLER */
1687
1688 static int xgbe_setup_tc(struct net_device *netdev, u8 tc)
1689 {
1690 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1691 unsigned int offset, queue;
1692 u8 i;
1693
1694 if (tc && (tc != pdata->hw_feat.tc_cnt))
1695 return -EINVAL;
1696
1697 if (tc) {
1698 netdev_set_num_tc(netdev, tc);
1699 for (i = 0, queue = 0, offset = 0; i < tc; i++) {
1700 while ((queue < pdata->tx_q_count) &&
1701 (pdata->q2tc_map[queue] == i))
1702 queue++;
1703
1704 DBGPR(" TC%u using TXq%u-%u\n", i, offset, queue - 1);
1705 netdev_set_tc_queue(netdev, i, queue - offset, offset);
1706 offset = queue;
1707 }
1708 } else {
1709 netdev_reset_tc(netdev);
1710 }
1711
1712 return 0;
1713 }
1714
1715 static int xgbe_set_features(struct net_device *netdev,
1716 netdev_features_t features)
1717 {
1718 struct xgbe_prv_data *pdata = netdev_priv(netdev);
1719 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1720 netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
1721 int ret = 0;
1722
1723 rxhash = pdata->netdev_features & NETIF_F_RXHASH;
1724 rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
1725 rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
1726 rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
1727
1728 if ((features & NETIF_F_RXHASH) && !rxhash)
1729 ret = hw_if->enable_rss(pdata);
1730 else if (!(features & NETIF_F_RXHASH) && rxhash)
1731 ret = hw_if->disable_rss(pdata);
1732 if (ret)
1733 return ret;
1734
1735 if ((features & NETIF_F_RXCSUM) && !rxcsum)
1736 hw_if->enable_rx_csum(pdata);
1737 else if (!(features & NETIF_F_RXCSUM) && rxcsum)
1738 hw_if->disable_rx_csum(pdata);
1739
1740 if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
1741 hw_if->enable_rx_vlan_stripping(pdata);
1742 else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
1743 hw_if->disable_rx_vlan_stripping(pdata);
1744
1745 if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
1746 hw_if->enable_rx_vlan_filtering(pdata);
1747 else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
1748 hw_if->disable_rx_vlan_filtering(pdata);
1749
1750 pdata->netdev_features = features;
1751
1752 DBGPR("<--xgbe_set_features\n");
1753
1754 return 0;
1755 }
1756
1757 static const struct net_device_ops xgbe_netdev_ops = {
1758 .ndo_open = xgbe_open,
1759 .ndo_stop = xgbe_close,
1760 .ndo_start_xmit = xgbe_xmit,
1761 .ndo_set_rx_mode = xgbe_set_rx_mode,
1762 .ndo_set_mac_address = xgbe_set_mac_address,
1763 .ndo_validate_addr = eth_validate_addr,
1764 .ndo_do_ioctl = xgbe_ioctl,
1765 .ndo_change_mtu = xgbe_change_mtu,
1766 .ndo_get_stats64 = xgbe_get_stats64,
1767 .ndo_vlan_rx_add_vid = xgbe_vlan_rx_add_vid,
1768 .ndo_vlan_rx_kill_vid = xgbe_vlan_rx_kill_vid,
1769 #ifdef CONFIG_NET_POLL_CONTROLLER
1770 .ndo_poll_controller = xgbe_poll_controller,
1771 #endif
1772 .ndo_setup_tc = xgbe_setup_tc,
1773 .ndo_set_features = xgbe_set_features,
1774 };
1775
1776 struct net_device_ops *xgbe_get_netdev_ops(void)
1777 {
1778 return (struct net_device_ops *)&xgbe_netdev_ops;
1779 }
1780
1781 static void xgbe_rx_refresh(struct xgbe_channel *channel)
1782 {
1783 struct xgbe_prv_data *pdata = channel->pdata;
1784 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1785 struct xgbe_desc_if *desc_if = &pdata->desc_if;
1786 struct xgbe_ring *ring = channel->rx_ring;
1787 struct xgbe_ring_data *rdata;
1788
1789 while (ring->dirty != ring->cur) {
1790 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
1791
1792 /* Reset rdata values */
1793 desc_if->unmap_rdata(pdata, rdata);
1794
1795 if (desc_if->map_rx_buffer(pdata, ring, rdata))
1796 break;
1797
1798 hw_if->rx_desc_reset(rdata);
1799
1800 ring->dirty++;
1801 }
1802
1803 /* Make sure everything is written before the register write */
1804 wmb();
1805
1806 /* Update the Rx Tail Pointer Register with address of
1807 * the last cleaned entry */
1808 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
1809 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
1810 lower_32_bits(rdata->rdesc_dma));
1811 }
1812
1813 static struct sk_buff *xgbe_create_skb(struct xgbe_prv_data *pdata,
1814 struct xgbe_ring_data *rdata,
1815 unsigned int *len)
1816 {
1817 struct net_device *netdev = pdata->netdev;
1818 struct sk_buff *skb;
1819 u8 *packet;
1820 unsigned int copy_len;
1821
1822 skb = netdev_alloc_skb_ip_align(netdev, rdata->rx.hdr.dma_len);
1823 if (!skb)
1824 return NULL;
1825
1826 packet = page_address(rdata->rx.hdr.pa.pages) +
1827 rdata->rx.hdr.pa.pages_offset;
1828 copy_len = (rdata->rx.hdr_len) ? rdata->rx.hdr_len : *len;
1829 copy_len = min(rdata->rx.hdr.dma_len, copy_len);
1830 skb_copy_to_linear_data(skb, packet, copy_len);
1831 skb_put(skb, copy_len);
1832
1833 *len -= copy_len;
1834
1835 return skb;
1836 }
1837
1838 static int xgbe_tx_poll(struct xgbe_channel *channel)
1839 {
1840 struct xgbe_prv_data *pdata = channel->pdata;
1841 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1842 struct xgbe_desc_if *desc_if = &pdata->desc_if;
1843 struct xgbe_ring *ring = channel->tx_ring;
1844 struct xgbe_ring_data *rdata;
1845 struct xgbe_ring_desc *rdesc;
1846 struct net_device *netdev = pdata->netdev;
1847 struct netdev_queue *txq;
1848 int processed = 0;
1849 unsigned int tx_packets = 0, tx_bytes = 0;
1850
1851 DBGPR("-->xgbe_tx_poll\n");
1852
1853 /* Nothing to do if there isn't a Tx ring for this channel */
1854 if (!ring)
1855 return 0;
1856
1857 txq = netdev_get_tx_queue(netdev, channel->queue_index);
1858
1859 while ((processed < XGBE_TX_DESC_MAX_PROC) &&
1860 (ring->dirty != ring->cur)) {
1861 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
1862 rdesc = rdata->rdesc;
1863
1864 if (!hw_if->tx_complete(rdesc))
1865 break;
1866
1867 /* Make sure descriptor fields are read after reading the OWN
1868 * bit */
1869 dma_rmb();
1870
1871 #ifdef XGMAC_ENABLE_TX_DESC_DUMP
1872 xgbe_dump_tx_desc(ring, ring->dirty, 1, 0);
1873 #endif
1874
1875 if (hw_if->is_last_desc(rdesc)) {
1876 tx_packets += rdata->tx.packets;
1877 tx_bytes += rdata->tx.bytes;
1878 }
1879
1880 /* Free the SKB and reset the descriptor for re-use */
1881 desc_if->unmap_rdata(pdata, rdata);
1882 hw_if->tx_desc_reset(rdata);
1883
1884 processed++;
1885 ring->dirty++;
1886 }
1887
1888 if (!processed)
1889 return 0;
1890
1891 netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
1892
1893 if ((ring->tx.queue_stopped == 1) &&
1894 (xgbe_tx_avail_desc(ring) > XGBE_TX_DESC_MIN_FREE)) {
1895 ring->tx.queue_stopped = 0;
1896 netif_tx_wake_queue(txq);
1897 }
1898
1899 DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
1900
1901 return processed;
1902 }
1903
1904 static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
1905 {
1906 struct xgbe_prv_data *pdata = channel->pdata;
1907 struct xgbe_hw_if *hw_if = &pdata->hw_if;
1908 struct xgbe_ring *ring = channel->rx_ring;
1909 struct xgbe_ring_data *rdata;
1910 struct xgbe_packet_data *packet;
1911 struct net_device *netdev = pdata->netdev;
1912 struct napi_struct *napi;
1913 struct sk_buff *skb;
1914 struct skb_shared_hwtstamps *hwtstamps;
1915 unsigned int incomplete, error, context_next, context;
1916 unsigned int len, put_len, max_len;
1917 unsigned int received = 0;
1918 int packet_count = 0;
1919
1920 DBGPR("-->xgbe_rx_poll: budget=%d\n", budget);
1921
1922 /* Nothing to do if there isn't a Rx ring for this channel */
1923 if (!ring)
1924 return 0;
1925
1926 napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
1927
1928 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
1929 packet = &ring->packet_data;
1930 while (packet_count < budget) {
1931 DBGPR(" cur = %d\n", ring->cur);
1932
1933 /* First time in loop see if we need to restore state */
1934 if (!received && rdata->state_saved) {
1935 incomplete = rdata->state.incomplete;
1936 context_next = rdata->state.context_next;
1937 skb = rdata->state.skb;
1938 error = rdata->state.error;
1939 len = rdata->state.len;
1940 } else {
1941 memset(packet, 0, sizeof(*packet));
1942 incomplete = 0;
1943 context_next = 0;
1944 skb = NULL;
1945 error = 0;
1946 len = 0;
1947 }
1948
1949 read_again:
1950 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
1951
1952 if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
1953 xgbe_rx_refresh(channel);
1954
1955 if (hw_if->dev_read(channel))
1956 break;
1957
1958 received++;
1959 ring->cur++;
1960
1961 incomplete = XGMAC_GET_BITS(packet->attributes,
1962 RX_PACKET_ATTRIBUTES,
1963 INCOMPLETE);
1964 context_next = XGMAC_GET_BITS(packet->attributes,
1965 RX_PACKET_ATTRIBUTES,
1966 CONTEXT_NEXT);
1967 context = XGMAC_GET_BITS(packet->attributes,
1968 RX_PACKET_ATTRIBUTES,
1969 CONTEXT);
1970
1971 /* Earlier error, just drain the remaining data */
1972 if ((incomplete || context_next) && error)
1973 goto read_again;
1974
1975 if (error || packet->errors) {
1976 if (packet->errors)
1977 DBGPR("Error in received packet\n");
1978 dev_kfree_skb(skb);
1979 goto next_packet;
1980 }
1981
1982 if (!context) {
1983 put_len = rdata->rx.len - len;
1984 len += put_len;
1985
1986 if (!skb) {
1987 dma_sync_single_for_cpu(pdata->dev,
1988 rdata->rx.hdr.dma,
1989 rdata->rx.hdr.dma_len,
1990 DMA_FROM_DEVICE);
1991
1992 skb = xgbe_create_skb(pdata, rdata, &put_len);
1993 if (!skb) {
1994 error = 1;
1995 goto skip_data;
1996 }
1997 }
1998
1999 if (put_len) {
2000 dma_sync_single_for_cpu(pdata->dev,
2001 rdata->rx.buf.dma,
2002 rdata->rx.buf.dma_len,
2003 DMA_FROM_DEVICE);
2004
2005 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
2006 rdata->rx.buf.pa.pages,
2007 rdata->rx.buf.pa.pages_offset,
2008 put_len, rdata->rx.buf.dma_len);
2009 rdata->rx.buf.pa.pages = NULL;
2010 }
2011 }
2012
2013 skip_data:
2014 if (incomplete || context_next)
2015 goto read_again;
2016
2017 if (!skb)
2018 goto next_packet;
2019
2020 /* Be sure we don't exceed the configured MTU */
2021 max_len = netdev->mtu + ETH_HLEN;
2022 if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
2023 (skb->protocol == htons(ETH_P_8021Q)))
2024 max_len += VLAN_HLEN;
2025
2026 if (skb->len > max_len) {
2027 DBGPR("packet length exceeds configured MTU\n");
2028 dev_kfree_skb(skb);
2029 goto next_packet;
2030 }
2031
2032 #ifdef XGMAC_ENABLE_RX_PKT_DUMP
2033 xgbe_print_pkt(netdev, skb, false);
2034 #endif
2035
2036 skb_checksum_none_assert(skb);
2037 if (XGMAC_GET_BITS(packet->attributes,
2038 RX_PACKET_ATTRIBUTES, CSUM_DONE))
2039 skb->ip_summed = CHECKSUM_UNNECESSARY;
2040
2041 if (XGMAC_GET_BITS(packet->attributes,
2042 RX_PACKET_ATTRIBUTES, VLAN_CTAG))
2043 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2044 packet->vlan_ctag);
2045
2046 if (XGMAC_GET_BITS(packet->attributes,
2047 RX_PACKET_ATTRIBUTES, RX_TSTAMP)) {
2048 u64 nsec;
2049
2050 nsec = timecounter_cyc2time(&pdata->tstamp_tc,
2051 packet->rx_tstamp);
2052 hwtstamps = skb_hwtstamps(skb);
2053 hwtstamps->hwtstamp = ns_to_ktime(nsec);
2054 }
2055
2056 if (XGMAC_GET_BITS(packet->attributes,
2057 RX_PACKET_ATTRIBUTES, RSS_HASH))
2058 skb_set_hash(skb, packet->rss_hash,
2059 packet->rss_hash_type);
2060
2061 skb->dev = netdev;
2062 skb->protocol = eth_type_trans(skb, netdev);
2063 skb_record_rx_queue(skb, channel->queue_index);
2064 skb_mark_napi_id(skb, napi);
2065
2066 netdev->last_rx = jiffies;
2067 napi_gro_receive(napi, skb);
2068
2069 next_packet:
2070 packet_count++;
2071 }
2072
2073 /* Check if we need to save state before leaving */
2074 if (received && (incomplete || context_next)) {
2075 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2076 rdata->state_saved = 1;
2077 rdata->state.incomplete = incomplete;
2078 rdata->state.context_next = context_next;
2079 rdata->state.skb = skb;
2080 rdata->state.len = len;
2081 rdata->state.error = error;
2082 }
2083
2084 DBGPR("<--xgbe_rx_poll: packet_count = %d\n", packet_count);
2085
2086 return packet_count;
2087 }
2088
2089 static int xgbe_one_poll(struct napi_struct *napi, int budget)
2090 {
2091 struct xgbe_channel *channel = container_of(napi, struct xgbe_channel,
2092 napi);
2093 int processed = 0;
2094
2095 DBGPR("-->xgbe_one_poll: budget=%d\n", budget);
2096
2097 /* Cleanup Tx ring first */
2098 xgbe_tx_poll(channel);
2099
2100 /* Process Rx ring next */
2101 processed = xgbe_rx_poll(channel, budget);
2102
2103 /* If we processed everything, we are done */
2104 if (processed < budget) {
2105 /* Turn off polling */
2106 napi_complete(napi);
2107
2108 /* Enable Tx and Rx interrupts */
2109 enable_irq(channel->dma_irq);
2110 }
2111
2112 DBGPR("<--xgbe_one_poll: received = %d\n", processed);
2113
2114 return processed;
2115 }
2116
2117 static int xgbe_all_poll(struct napi_struct *napi, int budget)
2118 {
2119 struct xgbe_prv_data *pdata = container_of(napi, struct xgbe_prv_data,
2120 napi);
2121 struct xgbe_channel *channel;
2122 int ring_budget;
2123 int processed, last_processed;
2124 unsigned int i;
2125
2126 DBGPR("-->xgbe_all_poll: budget=%d\n", budget);
2127
2128 processed = 0;
2129 ring_budget = budget / pdata->rx_ring_count;
2130 do {
2131 last_processed = processed;
2132
2133 channel = pdata->channel;
2134 for (i = 0; i < pdata->channel_count; i++, channel++) {
2135 /* Cleanup Tx ring first */
2136 xgbe_tx_poll(channel);
2137
2138 /* Process Rx ring next */
2139 if (ring_budget > (budget - processed))
2140 ring_budget = budget - processed;
2141 processed += xgbe_rx_poll(channel, ring_budget);
2142 }
2143 } while ((processed < budget) && (processed != last_processed));
2144
2145 /* If we processed everything, we are done */
2146 if (processed < budget) {
2147 /* Turn off polling */
2148 napi_complete(napi);
2149
2150 /* Enable Tx and Rx interrupts */
2151 xgbe_enable_rx_tx_ints(pdata);
2152 }
2153
2154 DBGPR("<--xgbe_all_poll: received = %d\n", processed);
2155
2156 return processed;
2157 }
2158
2159 void xgbe_dump_tx_desc(struct xgbe_ring *ring, unsigned int idx,
2160 unsigned int count, unsigned int flag)
2161 {
2162 struct xgbe_ring_data *rdata;
2163 struct xgbe_ring_desc *rdesc;
2164
2165 while (count--) {
2166 rdata = XGBE_GET_DESC_DATA(ring, idx);
2167 rdesc = rdata->rdesc;
2168 pr_alert("TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx,
2169 (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE",
2170 le32_to_cpu(rdesc->desc0), le32_to_cpu(rdesc->desc1),
2171 le32_to_cpu(rdesc->desc2), le32_to_cpu(rdesc->desc3));
2172 idx++;
2173 }
2174 }
2175
2176 void xgbe_dump_rx_desc(struct xgbe_ring *ring, struct xgbe_ring_desc *desc,
2177 unsigned int idx)
2178 {
2179 pr_alert("RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n", idx,
2180 le32_to_cpu(desc->desc0), le32_to_cpu(desc->desc1),
2181 le32_to_cpu(desc->desc2), le32_to_cpu(desc->desc3));
2182 }
2183
2184 void xgbe_print_pkt(struct net_device *netdev, struct sk_buff *skb, bool tx_rx)
2185 {
2186 struct ethhdr *eth = (struct ethhdr *)skb->data;
2187 unsigned char *buf = skb->data;
2188 unsigned char buffer[128];
2189 unsigned int i, j;
2190
2191 netdev_alert(netdev, "\n************** SKB dump ****************\n");
2192
2193 netdev_alert(netdev, "%s packet of %d bytes\n",
2194 (tx_rx ? "TX" : "RX"), skb->len);
2195
2196 netdev_alert(netdev, "Dst MAC addr: %pM\n", eth->h_dest);
2197 netdev_alert(netdev, "Src MAC addr: %pM\n", eth->h_source);
2198 netdev_alert(netdev, "Protocol: 0x%04hx\n", ntohs(eth->h_proto));
2199
2200 for (i = 0, j = 0; i < skb->len;) {
2201 j += snprintf(buffer + j, sizeof(buffer) - j, "%02hhx",
2202 buf[i++]);
2203
2204 if ((i % 32) == 0) {
2205 netdev_alert(netdev, " 0x%04x: %s\n", i - 32, buffer);
2206 j = 0;
2207 } else if ((i % 16) == 0) {
2208 buffer[j++] = ' ';
2209 buffer[j++] = ' ';
2210 } else if ((i % 4) == 0) {
2211 buffer[j++] = ' ';
2212 }
2213 }
2214 if (i % 32)
2215 netdev_alert(netdev, " 0x%04x: %s\n", i - (i % 32), buffer);
2216
2217 netdev_alert(netdev, "\n************** SKB dump ****************\n");
2218 }
Linux kernel - Deliverables
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