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Commit | Line | Data |
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c5aa9e3b LT |
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 "xgbe.h" | |
118 | #include "xgbe-common.h" | |
119 | ||
08dcc47c | 120 | static void xgbe_unmap_rdata(struct xgbe_prv_data *, struct xgbe_ring_data *); |
c5aa9e3b LT |
121 | |
122 | static void xgbe_free_ring(struct xgbe_prv_data *pdata, | |
123 | struct xgbe_ring *ring) | |
124 | { | |
125 | struct xgbe_ring_data *rdata; | |
126 | unsigned int i; | |
127 | ||
128 | if (!ring) | |
129 | return; | |
130 | ||
131 | if (ring->rdata) { | |
132 | for (i = 0; i < ring->rdesc_count; i++) { | |
d0a8ba6c | 133 | rdata = XGBE_GET_DESC_DATA(ring, i); |
08dcc47c | 134 | xgbe_unmap_rdata(pdata, rdata); |
c5aa9e3b LT |
135 | } |
136 | ||
137 | kfree(ring->rdata); | |
138 | ring->rdata = NULL; | |
139 | } | |
140 | ||
174fd259 LT |
141 | if (ring->rx_hdr_pa.pages) { |
142 | dma_unmap_page(pdata->dev, ring->rx_hdr_pa.pages_dma, | |
143 | ring->rx_hdr_pa.pages_len, DMA_FROM_DEVICE); | |
144 | put_page(ring->rx_hdr_pa.pages); | |
145 | ||
146 | ring->rx_hdr_pa.pages = NULL; | |
147 | ring->rx_hdr_pa.pages_len = 0; | |
148 | ring->rx_hdr_pa.pages_offset = 0; | |
149 | ring->rx_hdr_pa.pages_dma = 0; | |
150 | } | |
151 | ||
152 | if (ring->rx_buf_pa.pages) { | |
153 | dma_unmap_page(pdata->dev, ring->rx_buf_pa.pages_dma, | |
154 | ring->rx_buf_pa.pages_len, DMA_FROM_DEVICE); | |
155 | put_page(ring->rx_buf_pa.pages); | |
156 | ||
157 | ring->rx_buf_pa.pages = NULL; | |
158 | ring->rx_buf_pa.pages_len = 0; | |
159 | ring->rx_buf_pa.pages_offset = 0; | |
160 | ring->rx_buf_pa.pages_dma = 0; | |
08dcc47c LT |
161 | } |
162 | ||
c5aa9e3b LT |
163 | if (ring->rdesc) { |
164 | dma_free_coherent(pdata->dev, | |
165 | (sizeof(struct xgbe_ring_desc) * | |
166 | ring->rdesc_count), | |
167 | ring->rdesc, ring->rdesc_dma); | |
168 | ring->rdesc = NULL; | |
169 | } | |
170 | } | |
171 | ||
172 | static void xgbe_free_ring_resources(struct xgbe_prv_data *pdata) | |
173 | { | |
174 | struct xgbe_channel *channel; | |
175 | unsigned int i; | |
176 | ||
177 | DBGPR("-->xgbe_free_ring_resources\n"); | |
178 | ||
179 | channel = pdata->channel; | |
180 | for (i = 0; i < pdata->channel_count; i++, channel++) { | |
181 | xgbe_free_ring(pdata, channel->tx_ring); | |
182 | xgbe_free_ring(pdata, channel->rx_ring); | |
183 | } | |
184 | ||
185 | DBGPR("<--xgbe_free_ring_resources\n"); | |
186 | } | |
187 | ||
188 | static int xgbe_init_ring(struct xgbe_prv_data *pdata, | |
189 | struct xgbe_ring *ring, unsigned int rdesc_count) | |
190 | { | |
191 | DBGPR("-->xgbe_init_ring\n"); | |
192 | ||
193 | if (!ring) | |
194 | return 0; | |
195 | ||
196 | /* Descriptors */ | |
197 | ring->rdesc_count = rdesc_count; | |
198 | ring->rdesc = dma_alloc_coherent(pdata->dev, | |
199 | (sizeof(struct xgbe_ring_desc) * | |
200 | rdesc_count), &ring->rdesc_dma, | |
201 | GFP_KERNEL); | |
202 | if (!ring->rdesc) | |
203 | return -ENOMEM; | |
204 | ||
205 | /* Descriptor information */ | |
206 | ring->rdata = kcalloc(rdesc_count, sizeof(struct xgbe_ring_data), | |
207 | GFP_KERNEL); | |
208 | if (!ring->rdata) | |
209 | return -ENOMEM; | |
210 | ||
34bf65df LT |
211 | netif_dbg(pdata, drv, pdata->netdev, |
212 | "rdesc=%p, rdesc_dma=%pad, rdata=%p\n", | |
213 | ring->rdesc, &ring->rdesc_dma, ring->rdata); | |
c5aa9e3b LT |
214 | |
215 | DBGPR("<--xgbe_init_ring\n"); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | static int xgbe_alloc_ring_resources(struct xgbe_prv_data *pdata) | |
221 | { | |
222 | struct xgbe_channel *channel; | |
223 | unsigned int i; | |
224 | int ret; | |
225 | ||
226 | DBGPR("-->xgbe_alloc_ring_resources\n"); | |
227 | ||
228 | channel = pdata->channel; | |
229 | for (i = 0; i < pdata->channel_count; i++, channel++) { | |
34bf65df LT |
230 | netif_dbg(pdata, drv, pdata->netdev, "%s - Tx ring:\n", |
231 | channel->name); | |
232 | ||
c5aa9e3b LT |
233 | ret = xgbe_init_ring(pdata, channel->tx_ring, |
234 | pdata->tx_desc_count); | |
235 | if (ret) { | |
236 | netdev_alert(pdata->netdev, | |
237 | "error initializing Tx ring\n"); | |
238 | goto err_ring; | |
239 | } | |
240 | ||
34bf65df LT |
241 | netif_dbg(pdata, drv, pdata->netdev, "%s - Rx ring:\n", |
242 | channel->name); | |
243 | ||
c5aa9e3b LT |
244 | ret = xgbe_init_ring(pdata, channel->rx_ring, |
245 | pdata->rx_desc_count); | |
246 | if (ret) { | |
247 | netdev_alert(pdata->netdev, | |
34bf65df | 248 | "error initializing Rx ring\n"); |
c5aa9e3b LT |
249 | goto err_ring; |
250 | } | |
251 | } | |
252 | ||
253 | DBGPR("<--xgbe_alloc_ring_resources\n"); | |
254 | ||
255 | return 0; | |
256 | ||
257 | err_ring: | |
258 | xgbe_free_ring_resources(pdata); | |
259 | ||
260 | return ret; | |
261 | } | |
262 | ||
174fd259 LT |
263 | static int xgbe_alloc_pages(struct xgbe_prv_data *pdata, |
264 | struct xgbe_page_alloc *pa, gfp_t gfp, int order) | |
08dcc47c | 265 | { |
174fd259 LT |
266 | struct page *pages = NULL; |
267 | dma_addr_t pages_dma; | |
268 | int ret; | |
08dcc47c | 269 | |
174fd259 | 270 | /* Try to obtain pages, decreasing order if necessary */ |
472cfe71 | 271 | gfp |= __GFP_COLD | __GFP_COMP | __GFP_NOWARN; |
174fd259 LT |
272 | while (order >= 0) { |
273 | pages = alloc_pages(gfp, order); | |
274 | if (pages) | |
275 | break; | |
08dcc47c | 276 | |
174fd259 | 277 | order--; |
08dcc47c | 278 | } |
174fd259 LT |
279 | if (!pages) |
280 | return -ENOMEM; | |
08dcc47c | 281 | |
174fd259 LT |
282 | /* Map the pages */ |
283 | pages_dma = dma_map_page(pdata->dev, pages, 0, | |
284 | PAGE_SIZE << order, DMA_FROM_DEVICE); | |
285 | ret = dma_mapping_error(pdata->dev, pages_dma); | |
286 | if (ret) { | |
287 | put_page(pages); | |
288 | return ret; | |
289 | } | |
08dcc47c | 290 | |
174fd259 LT |
291 | pa->pages = pages; |
292 | pa->pages_len = PAGE_SIZE << order; | |
293 | pa->pages_offset = 0; | |
294 | pa->pages_dma = pages_dma; | |
08dcc47c | 295 | |
174fd259 LT |
296 | return 0; |
297 | } | |
298 | ||
299 | static void xgbe_set_buffer_data(struct xgbe_buffer_data *bd, | |
300 | struct xgbe_page_alloc *pa, | |
301 | unsigned int len) | |
302 | { | |
303 | get_page(pa->pages); | |
304 | bd->pa = *pa; | |
305 | ||
cfbfd86b LT |
306 | bd->dma_base = pa->pages_dma; |
307 | bd->dma_off = pa->pages_offset; | |
174fd259 LT |
308 | bd->dma_len = len; |
309 | ||
310 | pa->pages_offset += len; | |
311 | if ((pa->pages_offset + len) > pa->pages_len) { | |
08dcc47c | 312 | /* This data descriptor is responsible for unmapping page(s) */ |
174fd259 | 313 | bd->pa_unmap = *pa; |
08dcc47c LT |
314 | |
315 | /* Get a new allocation next time */ | |
174fd259 LT |
316 | pa->pages = NULL; |
317 | pa->pages_len = 0; | |
318 | pa->pages_offset = 0; | |
319 | pa->pages_dma = 0; | |
320 | } | |
321 | } | |
322 | ||
323 | static int xgbe_map_rx_buffer(struct xgbe_prv_data *pdata, | |
324 | struct xgbe_ring *ring, | |
325 | struct xgbe_ring_data *rdata) | |
326 | { | |
327 | int order, ret; | |
328 | ||
329 | if (!ring->rx_hdr_pa.pages) { | |
330 | ret = xgbe_alloc_pages(pdata, &ring->rx_hdr_pa, GFP_ATOMIC, 0); | |
331 | if (ret) | |
332 | return ret; | |
333 | } | |
334 | ||
335 | if (!ring->rx_buf_pa.pages) { | |
336 | order = max_t(int, PAGE_ALLOC_COSTLY_ORDER - 1, 0); | |
337 | ret = xgbe_alloc_pages(pdata, &ring->rx_buf_pa, GFP_ATOMIC, | |
338 | order); | |
339 | if (ret) | |
340 | return ret; | |
08dcc47c LT |
341 | } |
342 | ||
174fd259 | 343 | /* Set up the header page info */ |
c9f140eb | 344 | xgbe_set_buffer_data(&rdata->rx.hdr, &ring->rx_hdr_pa, |
174fd259 LT |
345 | XGBE_SKB_ALLOC_SIZE); |
346 | ||
347 | /* Set up the buffer page info */ | |
c9f140eb | 348 | xgbe_set_buffer_data(&rdata->rx.buf, &ring->rx_buf_pa, |
174fd259 LT |
349 | pdata->rx_buf_size); |
350 | ||
08dcc47c LT |
351 | return 0; |
352 | } | |
353 | ||
c5aa9e3b LT |
354 | static void xgbe_wrapper_tx_descriptor_init(struct xgbe_prv_data *pdata) |
355 | { | |
356 | struct xgbe_hw_if *hw_if = &pdata->hw_if; | |
357 | struct xgbe_channel *channel; | |
358 | struct xgbe_ring *ring; | |
359 | struct xgbe_ring_data *rdata; | |
360 | struct xgbe_ring_desc *rdesc; | |
361 | dma_addr_t rdesc_dma; | |
362 | unsigned int i, j; | |
363 | ||
364 | DBGPR("-->xgbe_wrapper_tx_descriptor_init\n"); | |
365 | ||
366 | channel = pdata->channel; | |
367 | for (i = 0; i < pdata->channel_count; i++, channel++) { | |
368 | ring = channel->tx_ring; | |
369 | if (!ring) | |
370 | break; | |
371 | ||
372 | rdesc = ring->rdesc; | |
373 | rdesc_dma = ring->rdesc_dma; | |
374 | ||
375 | for (j = 0; j < ring->rdesc_count; j++) { | |
d0a8ba6c | 376 | rdata = XGBE_GET_DESC_DATA(ring, j); |
c5aa9e3b LT |
377 | |
378 | rdata->rdesc = rdesc; | |
379 | rdata->rdesc_dma = rdesc_dma; | |
380 | ||
381 | rdesc++; | |
382 | rdesc_dma += sizeof(struct xgbe_ring_desc); | |
383 | } | |
384 | ||
385 | ring->cur = 0; | |
386 | ring->dirty = 0; | |
16958a2b | 387 | memset(&ring->tx, 0, sizeof(ring->tx)); |
c5aa9e3b LT |
388 | |
389 | hw_if->tx_desc_init(channel); | |
390 | } | |
391 | ||
392 | DBGPR("<--xgbe_wrapper_tx_descriptor_init\n"); | |
393 | } | |
394 | ||
395 | static void xgbe_wrapper_rx_descriptor_init(struct xgbe_prv_data *pdata) | |
396 | { | |
397 | struct xgbe_hw_if *hw_if = &pdata->hw_if; | |
398 | struct xgbe_channel *channel; | |
399 | struct xgbe_ring *ring; | |
400 | struct xgbe_ring_desc *rdesc; | |
401 | struct xgbe_ring_data *rdata; | |
08dcc47c | 402 | dma_addr_t rdesc_dma; |
c5aa9e3b LT |
403 | unsigned int i, j; |
404 | ||
405 | DBGPR("-->xgbe_wrapper_rx_descriptor_init\n"); | |
406 | ||
407 | channel = pdata->channel; | |
408 | for (i = 0; i < pdata->channel_count; i++, channel++) { | |
409 | ring = channel->rx_ring; | |
410 | if (!ring) | |
411 | break; | |
412 | ||
413 | rdesc = ring->rdesc; | |
414 | rdesc_dma = ring->rdesc_dma; | |
415 | ||
416 | for (j = 0; j < ring->rdesc_count; j++) { | |
d0a8ba6c | 417 | rdata = XGBE_GET_DESC_DATA(ring, j); |
c5aa9e3b LT |
418 | |
419 | rdata->rdesc = rdesc; | |
420 | rdata->rdesc_dma = rdesc_dma; | |
421 | ||
08dcc47c | 422 | if (xgbe_map_rx_buffer(pdata, ring, rdata)) |
c5aa9e3b | 423 | break; |
c5aa9e3b LT |
424 | |
425 | rdesc++; | |
426 | rdesc_dma += sizeof(struct xgbe_ring_desc); | |
427 | } | |
428 | ||
429 | ring->cur = 0; | |
430 | ring->dirty = 0; | |
c5aa9e3b LT |
431 | |
432 | hw_if->rx_desc_init(channel); | |
433 | } | |
434 | ||
435 | DBGPR("<--xgbe_wrapper_rx_descriptor_init\n"); | |
436 | } | |
437 | ||
08dcc47c LT |
438 | static void xgbe_unmap_rdata(struct xgbe_prv_data *pdata, |
439 | struct xgbe_ring_data *rdata) | |
c5aa9e3b LT |
440 | { |
441 | if (rdata->skb_dma) { | |
442 | if (rdata->mapped_as_page) { | |
443 | dma_unmap_page(pdata->dev, rdata->skb_dma, | |
444 | rdata->skb_dma_len, DMA_TO_DEVICE); | |
445 | } else { | |
446 | dma_unmap_single(pdata->dev, rdata->skb_dma, | |
447 | rdata->skb_dma_len, DMA_TO_DEVICE); | |
448 | } | |
449 | rdata->skb_dma = 0; | |
450 | rdata->skb_dma_len = 0; | |
451 | } | |
452 | ||
453 | if (rdata->skb) { | |
454 | dev_kfree_skb_any(rdata->skb); | |
455 | rdata->skb = NULL; | |
456 | } | |
457 | ||
c9f140eb LT |
458 | if (rdata->rx.hdr.pa.pages) |
459 | put_page(rdata->rx.hdr.pa.pages); | |
08dcc47c | 460 | |
c9f140eb LT |
461 | if (rdata->rx.hdr.pa_unmap.pages) { |
462 | dma_unmap_page(pdata->dev, rdata->rx.hdr.pa_unmap.pages_dma, | |
463 | rdata->rx.hdr.pa_unmap.pages_len, | |
174fd259 | 464 | DMA_FROM_DEVICE); |
c9f140eb | 465 | put_page(rdata->rx.hdr.pa_unmap.pages); |
08dcc47c LT |
466 | } |
467 | ||
c9f140eb LT |
468 | if (rdata->rx.buf.pa.pages) |
469 | put_page(rdata->rx.buf.pa.pages); | |
174fd259 | 470 | |
c9f140eb LT |
471 | if (rdata->rx.buf.pa_unmap.pages) { |
472 | dma_unmap_page(pdata->dev, rdata->rx.buf.pa_unmap.pages_dma, | |
473 | rdata->rx.buf.pa_unmap.pages_len, | |
174fd259 | 474 | DMA_FROM_DEVICE); |
c9f140eb | 475 | put_page(rdata->rx.buf.pa_unmap.pages); |
174fd259 | 476 | } |
08dcc47c | 477 | |
c9f140eb LT |
478 | memset(&rdata->tx, 0, sizeof(rdata->tx)); |
479 | memset(&rdata->rx, 0, sizeof(rdata->rx)); | |
08dcc47c | 480 | |
c5aa9e3b | 481 | rdata->mapped_as_page = 0; |
23e4eef7 LT |
482 | |
483 | if (rdata->state_saved) { | |
484 | rdata->state_saved = 0; | |
23e4eef7 LT |
485 | rdata->state.skb = NULL; |
486 | rdata->state.len = 0; | |
487 | rdata->state.error = 0; | |
488 | } | |
c5aa9e3b LT |
489 | } |
490 | ||
491 | static int xgbe_map_tx_skb(struct xgbe_channel *channel, struct sk_buff *skb) | |
492 | { | |
493 | struct xgbe_prv_data *pdata = channel->pdata; | |
494 | struct xgbe_ring *ring = channel->tx_ring; | |
495 | struct xgbe_ring_data *rdata; | |
496 | struct xgbe_packet_data *packet; | |
497 | struct skb_frag_struct *frag; | |
498 | dma_addr_t skb_dma; | |
499 | unsigned int start_index, cur_index; | |
500 | unsigned int offset, tso, vlan, datalen, len; | |
501 | unsigned int i; | |
502 | ||
503 | DBGPR("-->xgbe_map_tx_skb: cur = %d\n", ring->cur); | |
504 | ||
505 | offset = 0; | |
506 | start_index = ring->cur; | |
507 | cur_index = ring->cur; | |
508 | ||
509 | packet = &ring->packet_data; | |
510 | packet->rdesc_count = 0; | |
511 | packet->length = 0; | |
512 | ||
513 | tso = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, | |
514 | TSO_ENABLE); | |
515 | vlan = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, | |
516 | VLAN_CTAG); | |
517 | ||
518 | /* Save space for a context descriptor if needed */ | |
519 | if ((tso && (packet->mss != ring->tx.cur_mss)) || | |
520 | (vlan && (packet->vlan_ctag != ring->tx.cur_vlan_ctag))) | |
521 | cur_index++; | |
d0a8ba6c | 522 | rdata = XGBE_GET_DESC_DATA(ring, cur_index); |
c5aa9e3b LT |
523 | |
524 | if (tso) { | |
c5aa9e3b LT |
525 | /* Map the TSO header */ |
526 | skb_dma = dma_map_single(pdata->dev, skb->data, | |
527 | packet->header_len, DMA_TO_DEVICE); | |
528 | if (dma_mapping_error(pdata->dev, skb_dma)) { | |
529 | netdev_alert(pdata->netdev, "dma_map_single failed\n"); | |
530 | goto err_out; | |
531 | } | |
532 | rdata->skb_dma = skb_dma; | |
533 | rdata->skb_dma_len = packet->header_len; | |
34bf65df LT |
534 | netif_dbg(pdata, tx_queued, pdata->netdev, |
535 | "skb header: index=%u, dma=%pad, len=%u\n", | |
536 | cur_index, &skb_dma, packet->header_len); | |
c5aa9e3b LT |
537 | |
538 | offset = packet->header_len; | |
539 | ||
540 | packet->length += packet->header_len; | |
541 | ||
542 | cur_index++; | |
d0a8ba6c | 543 | rdata = XGBE_GET_DESC_DATA(ring, cur_index); |
c5aa9e3b LT |
544 | } |
545 | ||
546 | /* Map the (remainder of the) packet */ | |
547 | for (datalen = skb_headlen(skb) - offset; datalen; ) { | |
d0a8ba6c | 548 | len = min_t(unsigned int, datalen, XGBE_TX_MAX_BUF_SIZE); |
c5aa9e3b LT |
549 | |
550 | skb_dma = dma_map_single(pdata->dev, skb->data + offset, len, | |
551 | DMA_TO_DEVICE); | |
552 | if (dma_mapping_error(pdata->dev, skb_dma)) { | |
553 | netdev_alert(pdata->netdev, "dma_map_single failed\n"); | |
554 | goto err_out; | |
555 | } | |
556 | rdata->skb_dma = skb_dma; | |
557 | rdata->skb_dma_len = len; | |
34bf65df LT |
558 | netif_dbg(pdata, tx_queued, pdata->netdev, |
559 | "skb data: index=%u, dma=%pad, len=%u\n", | |
560 | cur_index, &skb_dma, len); | |
c5aa9e3b LT |
561 | |
562 | datalen -= len; | |
563 | offset += len; | |
564 | ||
565 | packet->length += len; | |
566 | ||
567 | cur_index++; | |
d0a8ba6c | 568 | rdata = XGBE_GET_DESC_DATA(ring, cur_index); |
c5aa9e3b LT |
569 | } |
570 | ||
571 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
34bf65df LT |
572 | netif_dbg(pdata, tx_queued, pdata->netdev, |
573 | "mapping frag %u\n", i); | |
c5aa9e3b LT |
574 | |
575 | frag = &skb_shinfo(skb)->frags[i]; | |
576 | offset = 0; | |
577 | ||
578 | for (datalen = skb_frag_size(frag); datalen; ) { | |
d0a8ba6c LT |
579 | len = min_t(unsigned int, datalen, |
580 | XGBE_TX_MAX_BUF_SIZE); | |
c5aa9e3b LT |
581 | |
582 | skb_dma = skb_frag_dma_map(pdata->dev, frag, offset, | |
583 | len, DMA_TO_DEVICE); | |
584 | if (dma_mapping_error(pdata->dev, skb_dma)) { | |
585 | netdev_alert(pdata->netdev, | |
586 | "skb_frag_dma_map failed\n"); | |
587 | goto err_out; | |
588 | } | |
589 | rdata->skb_dma = skb_dma; | |
590 | rdata->skb_dma_len = len; | |
591 | rdata->mapped_as_page = 1; | |
34bf65df LT |
592 | netif_dbg(pdata, tx_queued, pdata->netdev, |
593 | "skb frag: index=%u, dma=%pad, len=%u\n", | |
594 | cur_index, &skb_dma, len); | |
c5aa9e3b LT |
595 | |
596 | datalen -= len; | |
597 | offset += len; | |
598 | ||
599 | packet->length += len; | |
600 | ||
601 | cur_index++; | |
d0a8ba6c | 602 | rdata = XGBE_GET_DESC_DATA(ring, cur_index); |
c5aa9e3b LT |
603 | } |
604 | } | |
605 | ||
c1530317 LT |
606 | /* Save the skb address in the last entry. We always have some data |
607 | * that has been mapped so rdata is always advanced past the last | |
608 | * piece of mapped data - use the entry pointed to by cur_index - 1. | |
609 | */ | |
610 | rdata = XGBE_GET_DESC_DATA(ring, cur_index - 1); | |
c5aa9e3b LT |
611 | rdata->skb = skb; |
612 | ||
613 | /* Save the number of descriptor entries used */ | |
614 | packet->rdesc_count = cur_index - start_index; | |
615 | ||
616 | DBGPR("<--xgbe_map_tx_skb: count=%u\n", packet->rdesc_count); | |
617 | ||
618 | return packet->rdesc_count; | |
619 | ||
620 | err_out: | |
621 | while (start_index < cur_index) { | |
d0a8ba6c | 622 | rdata = XGBE_GET_DESC_DATA(ring, start_index++); |
08dcc47c | 623 | xgbe_unmap_rdata(pdata, rdata); |
c5aa9e3b LT |
624 | } |
625 | ||
626 | DBGPR("<--xgbe_map_tx_skb: count=0\n"); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
c5aa9e3b LT |
631 | void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *desc_if) |
632 | { | |
633 | DBGPR("-->xgbe_init_function_ptrs_desc\n"); | |
634 | ||
635 | desc_if->alloc_ring_resources = xgbe_alloc_ring_resources; | |
636 | desc_if->free_ring_resources = xgbe_free_ring_resources; | |
637 | desc_if->map_tx_skb = xgbe_map_tx_skb; | |
270894e7 | 638 | desc_if->map_rx_buffer = xgbe_map_rx_buffer; |
08dcc47c | 639 | desc_if->unmap_rdata = xgbe_unmap_rdata; |
c5aa9e3b LT |
640 | desc_if->wrapper_tx_desc_init = xgbe_wrapper_tx_descriptor_init; |
641 | desc_if->wrapper_rx_desc_init = xgbe_wrapper_rx_descriptor_init; | |
642 | ||
643 | DBGPR("<--xgbe_init_function_ptrs_desc\n"); | |
644 | } |