Commit | Line | Data |
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c27a02cd YP |
1 | /* |
2 | * Copyright (c) 2007 Mellanox Technologies. 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 | */ | |
33 | ||
34 | #include <asm/page.h> | |
35 | #include <linux/mlx4/cq.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
c27a02cd YP |
37 | #include <linux/mlx4/qp.h> |
38 | #include <linux/skbuff.h> | |
39 | #include <linux/if_vlan.h> | |
29d40c90 | 40 | #include <linux/prefetch.h> |
c27a02cd | 41 | #include <linux/vmalloc.h> |
fa37a958 | 42 | #include <linux/tcp.h> |
837052d0 | 43 | #include <linux/ip.h> |
6eb07caf | 44 | #include <linux/moduleparam.h> |
c27a02cd YP |
45 | |
46 | #include "mlx4_en.h" | |
47 | ||
c27a02cd | 48 | int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, |
ddae0349 | 49 | struct mlx4_en_tx_ring **pring, u32 size, |
d03a68f8 | 50 | u16 stride, int node, int queue_index) |
c27a02cd YP |
51 | { |
52 | struct mlx4_en_dev *mdev = priv->mdev; | |
41d942d5 | 53 | struct mlx4_en_tx_ring *ring; |
c27a02cd YP |
54 | int tmp; |
55 | int err; | |
56 | ||
163561a4 | 57 | ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node); |
41d942d5 | 58 | if (!ring) { |
163561a4 EE |
59 | ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
60 | if (!ring) { | |
61 | en_err(priv, "Failed allocating TX ring\n"); | |
62 | return -ENOMEM; | |
63 | } | |
41d942d5 EE |
64 | } |
65 | ||
c27a02cd YP |
66 | ring->size = size; |
67 | ring->size_mask = size - 1; | |
68 | ring->stride = stride; | |
488a9b48 | 69 | ring->full_size = ring->size - HEADROOM - MAX_DESC_TXBBS; |
c27a02cd | 70 | |
c27a02cd | 71 | tmp = size * sizeof(struct mlx4_en_tx_info); |
dc9b06d1 | 72 | ring->tx_info = kmalloc_node(tmp, GFP_KERNEL | __GFP_NOWARN, node); |
41d942d5 | 73 | if (!ring->tx_info) { |
163561a4 EE |
74 | ring->tx_info = vmalloc(tmp); |
75 | if (!ring->tx_info) { | |
76 | err = -ENOMEM; | |
77 | goto err_ring; | |
78 | } | |
41d942d5 | 79 | } |
e404decb | 80 | |
453a6082 | 81 | en_dbg(DRV, priv, "Allocated tx_info ring at addr:%p size:%d\n", |
c27a02cd YP |
82 | ring->tx_info, tmp); |
83 | ||
163561a4 | 84 | ring->bounce_buf = kmalloc_node(MAX_DESC_SIZE, GFP_KERNEL, node); |
c27a02cd | 85 | if (!ring->bounce_buf) { |
163561a4 EE |
86 | ring->bounce_buf = kmalloc(MAX_DESC_SIZE, GFP_KERNEL); |
87 | if (!ring->bounce_buf) { | |
88 | err = -ENOMEM; | |
89 | goto err_info; | |
90 | } | |
c27a02cd YP |
91 | } |
92 | ring->buf_size = ALIGN(size * ring->stride, MLX4_EN_PAGE_SIZE); | |
93 | ||
163561a4 | 94 | /* Allocate HW buffers on provided NUMA node */ |
872bf2fb | 95 | set_dev_node(&mdev->dev->persist->pdev->dev, node); |
c27a02cd YP |
96 | err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres, ring->buf_size, |
97 | 2 * PAGE_SIZE); | |
872bf2fb | 98 | set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); |
c27a02cd | 99 | if (err) { |
453a6082 | 100 | en_err(priv, "Failed allocating hwq resources\n"); |
c27a02cd YP |
101 | goto err_bounce; |
102 | } | |
103 | ||
104 | err = mlx4_en_map_buffer(&ring->wqres.buf); | |
105 | if (err) { | |
453a6082 | 106 | en_err(priv, "Failed to map TX buffer\n"); |
c27a02cd YP |
107 | goto err_hwq_res; |
108 | } | |
109 | ||
110 | ring->buf = ring->wqres.buf.direct.buf; | |
111 | ||
1a91de28 JP |
112 | en_dbg(DRV, priv, "Allocated TX ring (addr:%p) - buf:%p size:%d buf_size:%d dma:%llx\n", |
113 | ring, ring->buf, ring->size, ring->buf_size, | |
114 | (unsigned long long) ring->wqres.buf.direct.map); | |
c27a02cd | 115 | |
ddae0349 EE |
116 | err = mlx4_qp_reserve_range(mdev->dev, 1, 1, &ring->qpn, |
117 | MLX4_RESERVE_ETH_BF_QP); | |
118 | if (err) { | |
119 | en_err(priv, "failed reserving qp for TX ring\n"); | |
120 | goto err_map; | |
121 | } | |
122 | ||
40f2287b | 123 | err = mlx4_qp_alloc(mdev->dev, ring->qpn, &ring->qp, GFP_KERNEL); |
c27a02cd | 124 | if (err) { |
453a6082 | 125 | en_err(priv, "Failed allocating qp %d\n", ring->qpn); |
ddae0349 | 126 | goto err_reserve; |
c27a02cd | 127 | } |
966508f7 | 128 | ring->qp.event = mlx4_en_sqp_event; |
c27a02cd | 129 | |
163561a4 | 130 | err = mlx4_bf_alloc(mdev->dev, &ring->bf, node); |
87a5c389 | 131 | if (err) { |
1a91de28 | 132 | en_dbg(DRV, priv, "working without blueflame (%d)\n", err); |
87a5c389 YP |
133 | ring->bf.uar = &mdev->priv_uar; |
134 | ring->bf.uar->map = mdev->uar_map; | |
135 | ring->bf_enabled = false; | |
0fef9d03 AV |
136 | ring->bf_alloced = false; |
137 | priv->pflags &= ~MLX4_EN_PRIV_FLAGS_BLUEFLAME; | |
138 | } else { | |
139 | ring->bf_alloced = true; | |
140 | ring->bf_enabled = !!(priv->pflags & | |
141 | MLX4_EN_PRIV_FLAGS_BLUEFLAME); | |
142 | } | |
87a5c389 | 143 | |
ec693d47 | 144 | ring->hwtstamp_tx_type = priv->hwtstamp_config.tx_type; |
d03a68f8 IS |
145 | ring->queue_index = queue_index; |
146 | ||
42eab005 | 147 | if (queue_index < priv->num_tx_rings_p_up) |
f36963c9 RR |
148 | cpumask_set_cpu(cpumask_local_spread(queue_index, |
149 | priv->mdev->dev->numa_node), | |
150 | &ring->affinity_mask); | |
ec693d47 | 151 | |
41d942d5 | 152 | *pring = ring; |
c27a02cd YP |
153 | return 0; |
154 | ||
ddae0349 EE |
155 | err_reserve: |
156 | mlx4_qp_release_range(mdev->dev, ring->qpn, 1); | |
c27a02cd YP |
157 | err_map: |
158 | mlx4_en_unmap_buffer(&ring->wqres.buf); | |
159 | err_hwq_res: | |
160 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); | |
161 | err_bounce: | |
162 | kfree(ring->bounce_buf); | |
163 | ring->bounce_buf = NULL; | |
41d942d5 | 164 | err_info: |
dc9b06d1 | 165 | kvfree(ring->tx_info); |
c27a02cd | 166 | ring->tx_info = NULL; |
41d942d5 EE |
167 | err_ring: |
168 | kfree(ring); | |
169 | *pring = NULL; | |
c27a02cd YP |
170 | return err; |
171 | } | |
172 | ||
173 | void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv, | |
41d942d5 | 174 | struct mlx4_en_tx_ring **pring) |
c27a02cd YP |
175 | { |
176 | struct mlx4_en_dev *mdev = priv->mdev; | |
41d942d5 | 177 | struct mlx4_en_tx_ring *ring = *pring; |
453a6082 | 178 | en_dbg(DRV, priv, "Destroying tx ring, qpn: %d\n", ring->qpn); |
c27a02cd | 179 | |
0fef9d03 | 180 | if (ring->bf_alloced) |
87a5c389 | 181 | mlx4_bf_free(mdev->dev, &ring->bf); |
c27a02cd YP |
182 | mlx4_qp_remove(mdev->dev, &ring->qp); |
183 | mlx4_qp_free(mdev->dev, &ring->qp); | |
0eb08514 | 184 | mlx4_qp_release_range(priv->mdev->dev, ring->qpn, 1); |
c27a02cd YP |
185 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
186 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); | |
187 | kfree(ring->bounce_buf); | |
188 | ring->bounce_buf = NULL; | |
dc9b06d1 | 189 | kvfree(ring->tx_info); |
c27a02cd | 190 | ring->tx_info = NULL; |
41d942d5 EE |
191 | kfree(ring); |
192 | *pring = NULL; | |
c27a02cd YP |
193 | } |
194 | ||
195 | int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv, | |
196 | struct mlx4_en_tx_ring *ring, | |
0e98b523 | 197 | int cq, int user_prio) |
c27a02cd YP |
198 | { |
199 | struct mlx4_en_dev *mdev = priv->mdev; | |
200 | int err; | |
201 | ||
202 | ring->cqn = cq; | |
203 | ring->prod = 0; | |
204 | ring->cons = 0xffffffff; | |
205 | ring->last_nr_txbb = 1; | |
c27a02cd YP |
206 | memset(ring->tx_info, 0, ring->size * sizeof(struct mlx4_en_tx_info)); |
207 | memset(ring->buf, 0, ring->buf_size); | |
208 | ||
209 | ring->qp_state = MLX4_QP_STATE_RST; | |
6a4e8121 ED |
210 | ring->doorbell_qpn = cpu_to_be32(ring->qp.qpn << 8); |
211 | ring->mr_key = cpu_to_be32(mdev->mr.key); | |
c27a02cd YP |
212 | |
213 | mlx4_en_fill_qp_context(priv, ring->size, ring->stride, 1, 0, ring->qpn, | |
0e98b523 | 214 | ring->cqn, user_prio, &ring->context); |
0fef9d03 | 215 | if (ring->bf_alloced) |
87a5c389 | 216 | ring->context.usr_page = cpu_to_be32(ring->bf.uar->index); |
c27a02cd YP |
217 | |
218 | err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, &ring->context, | |
219 | &ring->qp, &ring->qp_state); | |
42eab005 | 220 | if (!cpumask_empty(&ring->affinity_mask)) |
d03a68f8 IS |
221 | netif_set_xps_queue(priv->dev, &ring->affinity_mask, |
222 | ring->queue_index); | |
c27a02cd YP |
223 | |
224 | return err; | |
225 | } | |
226 | ||
227 | void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv, | |
228 | struct mlx4_en_tx_ring *ring) | |
229 | { | |
230 | struct mlx4_en_dev *mdev = priv->mdev; | |
231 | ||
232 | mlx4_qp_modify(mdev->dev, NULL, ring->qp_state, | |
233 | MLX4_QP_STATE_RST, NULL, 0, 0, &ring->qp); | |
234 | } | |
235 | ||
488a9b48 IS |
236 | static inline bool mlx4_en_is_tx_ring_full(struct mlx4_en_tx_ring *ring) |
237 | { | |
238 | return ring->prod - ring->cons > ring->full_size; | |
239 | } | |
240 | ||
2d4b6466 EE |
241 | static void mlx4_en_stamp_wqe(struct mlx4_en_priv *priv, |
242 | struct mlx4_en_tx_ring *ring, int index, | |
243 | u8 owner) | |
244 | { | |
245 | __be32 stamp = cpu_to_be32(STAMP_VAL | (!!owner << STAMP_SHIFT)); | |
246 | struct mlx4_en_tx_desc *tx_desc = ring->buf + index * TXBB_SIZE; | |
247 | struct mlx4_en_tx_info *tx_info = &ring->tx_info[index]; | |
248 | void *end = ring->buf + ring->buf_size; | |
249 | __be32 *ptr = (__be32 *)tx_desc; | |
250 | int i; | |
251 | ||
252 | /* Optimize the common case when there are no wraparounds */ | |
253 | if (likely((void *)tx_desc + tx_info->nr_txbb * TXBB_SIZE <= end)) { | |
254 | /* Stamp the freed descriptor */ | |
255 | for (i = 0; i < tx_info->nr_txbb * TXBB_SIZE; | |
256 | i += STAMP_STRIDE) { | |
257 | *ptr = stamp; | |
258 | ptr += STAMP_DWORDS; | |
259 | } | |
260 | } else { | |
261 | /* Stamp the freed descriptor */ | |
262 | for (i = 0; i < tx_info->nr_txbb * TXBB_SIZE; | |
263 | i += STAMP_STRIDE) { | |
264 | *ptr = stamp; | |
265 | ptr += STAMP_DWORDS; | |
266 | if ((void *)ptr >= end) { | |
267 | ptr = ring->buf; | |
268 | stamp ^= cpu_to_be32(0x80000000); | |
269 | } | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
c27a02cd YP |
274 | |
275 | static u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv, | |
276 | struct mlx4_en_tx_ring *ring, | |
ec693d47 | 277 | int index, u8 owner, u64 timestamp) |
c27a02cd | 278 | { |
c27a02cd YP |
279 | struct mlx4_en_tx_info *tx_info = &ring->tx_info[index]; |
280 | struct mlx4_en_tx_desc *tx_desc = ring->buf + index * TXBB_SIZE; | |
281 | struct mlx4_wqe_data_seg *data = (void *) tx_desc + tx_info->data_offset; | |
c27a02cd | 282 | void *end = ring->buf + ring->buf_size; |
3d03641c ED |
283 | struct sk_buff *skb = tx_info->skb; |
284 | int nr_maps = tx_info->nr_maps; | |
c27a02cd | 285 | int i; |
ec693d47 | 286 | |
29d40c90 ED |
287 | /* We do not touch skb here, so prefetch skb->users location |
288 | * to speedup consume_skb() | |
289 | */ | |
290 | prefetchw(&skb->users); | |
291 | ||
3d03641c ED |
292 | if (unlikely(timestamp)) { |
293 | struct skb_shared_hwtstamps hwts; | |
294 | ||
295 | mlx4_en_fill_hwtstamps(priv->mdev, &hwts, timestamp); | |
ec693d47 AV |
296 | skb_tstamp_tx(skb, &hwts); |
297 | } | |
c27a02cd YP |
298 | |
299 | /* Optimize the common case when there are no wraparounds */ | |
300 | if (likely((void *) tx_desc + tx_info->nr_txbb * TXBB_SIZE <= end)) { | |
41efea5a | 301 | if (!tx_info->inl) { |
3d03641c | 302 | if (tx_info->linear) |
ebf8c9aa | 303 | dma_unmap_single(priv->ddev, |
3d03641c ED |
304 | tx_info->map0_dma, |
305 | tx_info->map0_byte_count, | |
306 | PCI_DMA_TODEVICE); | |
307 | else | |
308 | dma_unmap_page(priv->ddev, | |
309 | tx_info->map0_dma, | |
310 | tx_info->map0_byte_count, | |
311 | PCI_DMA_TODEVICE); | |
312 | for (i = 1; i < nr_maps; i++) { | |
313 | data++; | |
ebf8c9aa | 314 | dma_unmap_page(priv->ddev, |
3d03641c ED |
315 | (dma_addr_t)be64_to_cpu(data->addr), |
316 | be32_to_cpu(data->byte_count), | |
317 | PCI_DMA_TODEVICE); | |
41efea5a | 318 | } |
c27a02cd | 319 | } |
c27a02cd | 320 | } else { |
41efea5a YP |
321 | if (!tx_info->inl) { |
322 | if ((void *) data >= end) { | |
43d620c8 | 323 | data = ring->buf + ((void *)data - end); |
41efea5a | 324 | } |
c27a02cd | 325 | |
3d03641c | 326 | if (tx_info->linear) |
ebf8c9aa | 327 | dma_unmap_single(priv->ddev, |
3d03641c ED |
328 | tx_info->map0_dma, |
329 | tx_info->map0_byte_count, | |
330 | PCI_DMA_TODEVICE); | |
331 | else | |
332 | dma_unmap_page(priv->ddev, | |
333 | tx_info->map0_dma, | |
334 | tx_info->map0_byte_count, | |
335 | PCI_DMA_TODEVICE); | |
336 | for (i = 1; i < nr_maps; i++) { | |
337 | data++; | |
41efea5a YP |
338 | /* Check for wraparound before unmapping */ |
339 | if ((void *) data >= end) | |
43d620c8 | 340 | data = ring->buf; |
ebf8c9aa | 341 | dma_unmap_page(priv->ddev, |
3d03641c ED |
342 | (dma_addr_t)be64_to_cpu(data->addr), |
343 | be32_to_cpu(data->byte_count), | |
344 | PCI_DMA_TODEVICE); | |
41efea5a | 345 | } |
c27a02cd | 346 | } |
c27a02cd | 347 | } |
b89df95d | 348 | dev_consume_skb_any(skb); |
c27a02cd YP |
349 | return tx_info->nr_txbb; |
350 | } | |
351 | ||
352 | ||
353 | int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring) | |
354 | { | |
355 | struct mlx4_en_priv *priv = netdev_priv(dev); | |
356 | int cnt = 0; | |
357 | ||
358 | /* Skip last polled descriptor */ | |
359 | ring->cons += ring->last_nr_txbb; | |
453a6082 | 360 | en_dbg(DRV, priv, "Freeing Tx buf - cons:0x%x prod:0x%x\n", |
c27a02cd YP |
361 | ring->cons, ring->prod); |
362 | ||
363 | if ((u32) (ring->prod - ring->cons) > ring->size) { | |
364 | if (netif_msg_tx_err(priv)) | |
453a6082 | 365 | en_warn(priv, "Tx consumer passed producer!\n"); |
c27a02cd YP |
366 | return 0; |
367 | } | |
368 | ||
369 | while (ring->cons != ring->prod) { | |
370 | ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring, | |
371 | ring->cons & ring->size_mask, | |
ec693d47 | 372 | !!(ring->cons & ring->size), 0); |
c27a02cd YP |
373 | ring->cons += ring->last_nr_txbb; |
374 | cnt++; | |
375 | } | |
376 | ||
41b74920 TH |
377 | netdev_tx_reset_queue(ring->tx_queue); |
378 | ||
c27a02cd | 379 | if (cnt) |
453a6082 | 380 | en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt); |
c27a02cd YP |
381 | |
382 | return cnt; | |
383 | } | |
384 | ||
fbc6daf1 AV |
385 | static bool mlx4_en_process_tx_cq(struct net_device *dev, |
386 | struct mlx4_en_cq *cq) | |
c27a02cd YP |
387 | { |
388 | struct mlx4_en_priv *priv = netdev_priv(dev); | |
389 | struct mlx4_cq *mcq = &cq->mcq; | |
41d942d5 | 390 | struct mlx4_en_tx_ring *ring = priv->tx_ring[cq->ring]; |
f0ab34f0 | 391 | struct mlx4_cqe *cqe; |
c27a02cd | 392 | u16 index; |
2d4b6466 | 393 | u16 new_index, ring_index, stamp_index; |
c27a02cd | 394 | u32 txbbs_skipped = 0; |
2d4b6466 | 395 | u32 txbbs_stamp = 0; |
f0ab34f0 YP |
396 | u32 cons_index = mcq->cons_index; |
397 | int size = cq->size; | |
398 | u32 size_mask = ring->size_mask; | |
399 | struct mlx4_cqe *buf = cq->buf; | |
5b263f53 YP |
400 | u32 packets = 0; |
401 | u32 bytes = 0; | |
08ff3235 | 402 | int factor = priv->cqe_factor; |
ec693d47 | 403 | u64 timestamp = 0; |
0276a330 | 404 | int done = 0; |
fbc6daf1 | 405 | int budget = priv->tx_work_limit; |
fb1843ee ED |
406 | u32 last_nr_txbb; |
407 | u32 ring_cons; | |
c27a02cd YP |
408 | |
409 | if (!priv->port_up) | |
fbc6daf1 | 410 | return true; |
c27a02cd | 411 | |
53511453 ED |
412 | netdev_txq_bql_complete_prefetchw(ring->tx_queue); |
413 | ||
f0ab34f0 | 414 | index = cons_index & size_mask; |
b1b6b4da | 415 | cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor; |
fb1843ee ED |
416 | last_nr_txbb = ACCESS_ONCE(ring->last_nr_txbb); |
417 | ring_cons = ACCESS_ONCE(ring->cons); | |
418 | ring_index = ring_cons & size_mask; | |
2d4b6466 | 419 | stamp_index = ring_index; |
f0ab34f0 YP |
420 | |
421 | /* Process all completed CQEs */ | |
422 | while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK, | |
0276a330 | 423 | cons_index & size) && (done < budget)) { |
f0ab34f0 YP |
424 | /* |
425 | * make sure we read the CQE after we read the | |
426 | * ownership bit | |
427 | */ | |
12b3375f | 428 | dma_rmb(); |
f0ab34f0 | 429 | |
bd2f631d AV |
430 | if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == |
431 | MLX4_CQE_OPCODE_ERROR)) { | |
432 | struct mlx4_err_cqe *cqe_err = (struct mlx4_err_cqe *)cqe; | |
433 | ||
434 | en_err(priv, "CQE error - vendor syndrome: 0x%x syndrome: 0x%x\n", | |
435 | cqe_err->vendor_err_syndrome, | |
436 | cqe_err->syndrome); | |
437 | } | |
438 | ||
f0ab34f0 YP |
439 | /* Skip over last polled CQE */ |
440 | new_index = be16_to_cpu(cqe->wqe_index) & size_mask; | |
441 | ||
c27a02cd | 442 | do { |
fb1843ee ED |
443 | txbbs_skipped += last_nr_txbb; |
444 | ring_index = (ring_index + last_nr_txbb) & size_mask; | |
ec693d47 AV |
445 | if (ring->tx_info[ring_index].ts_requested) |
446 | timestamp = mlx4_en_get_cqe_ts(cqe); | |
447 | ||
f0ab34f0 | 448 | /* free next descriptor */ |
fb1843ee | 449 | last_nr_txbb = mlx4_en_free_tx_desc( |
f0ab34f0 | 450 | priv, ring, ring_index, |
fb1843ee | 451 | !!((ring_cons + txbbs_skipped) & |
ec693d47 | 452 | ring->size), timestamp); |
2d4b6466 EE |
453 | |
454 | mlx4_en_stamp_wqe(priv, ring, stamp_index, | |
fb1843ee | 455 | !!((ring_cons + txbbs_stamp) & |
2d4b6466 EE |
456 | ring->size)); |
457 | stamp_index = ring_index; | |
458 | txbbs_stamp = txbbs_skipped; | |
5b263f53 YP |
459 | packets++; |
460 | bytes += ring->tx_info[ring_index].nr_bytes; | |
0276a330 | 461 | } while ((++done < budget) && (ring_index != new_index)); |
f0ab34f0 YP |
462 | |
463 | ++cons_index; | |
464 | index = cons_index & size_mask; | |
b1b6b4da | 465 | cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor; |
f0ab34f0 | 466 | } |
c27a02cd | 467 | |
c27a02cd YP |
468 | |
469 | /* | |
470 | * To prevent CQ overflow we first update CQ consumer and only then | |
471 | * the ring consumer. | |
472 | */ | |
f0ab34f0 | 473 | mcq->cons_index = cons_index; |
c27a02cd YP |
474 | mlx4_cq_set_ci(mcq); |
475 | wmb(); | |
fb1843ee ED |
476 | |
477 | /* we want to dirty this cache line once */ | |
478 | ACCESS_ONCE(ring->last_nr_txbb) = last_nr_txbb; | |
479 | ACCESS_ONCE(ring->cons) = ring_cons + txbbs_skipped; | |
480 | ||
5b263f53 | 481 | netdev_tx_completed_queue(ring->tx_queue, packets, bytes); |
c27a02cd | 482 | |
488a9b48 | 483 | /* Wakeup Tx queue if this stopped, and ring is not full. |
c18520bd | 484 | */ |
488a9b48 IS |
485 | if (netif_tx_queue_stopped(ring->tx_queue) && |
486 | !mlx4_en_is_tx_ring_full(ring)) { | |
c18520bd | 487 | netif_tx_wake_queue(ring->tx_queue); |
15bffdff | 488 | ring->wake_queue++; |
c27a02cd | 489 | } |
fbc6daf1 | 490 | return done < budget; |
c27a02cd YP |
491 | } |
492 | ||
493 | void mlx4_en_tx_irq(struct mlx4_cq *mcq) | |
494 | { | |
495 | struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq); | |
496 | struct mlx4_en_priv *priv = netdev_priv(cq->dev); | |
c27a02cd | 497 | |
477b35b4 ED |
498 | if (likely(priv->port_up)) |
499 | napi_schedule_irqoff(&cq->napi); | |
0276a330 EE |
500 | else |
501 | mlx4_en_arm_cq(priv, cq); | |
c27a02cd YP |
502 | } |
503 | ||
0276a330 EE |
504 | /* TX CQ polling - called by NAPI */ |
505 | int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget) | |
506 | { | |
507 | struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi); | |
508 | struct net_device *dev = cq->dev; | |
509 | struct mlx4_en_priv *priv = netdev_priv(dev); | |
fbc6daf1 | 510 | int clean_complete; |
0276a330 | 511 | |
fbc6daf1 AV |
512 | clean_complete = mlx4_en_process_tx_cq(dev, cq); |
513 | if (!clean_complete) | |
514 | return budget; | |
0276a330 | 515 | |
fbc6daf1 AV |
516 | napi_complete(napi); |
517 | mlx4_en_arm_cq(priv, cq); | |
518 | ||
519 | return 0; | |
0276a330 | 520 | } |
c27a02cd | 521 | |
c27a02cd YP |
522 | static struct mlx4_en_tx_desc *mlx4_en_bounce_to_desc(struct mlx4_en_priv *priv, |
523 | struct mlx4_en_tx_ring *ring, | |
524 | u32 index, | |
525 | unsigned int desc_size) | |
526 | { | |
527 | u32 copy = (ring->size - index) * TXBB_SIZE; | |
528 | int i; | |
529 | ||
530 | for (i = desc_size - copy - 4; i >= 0; i -= 4) { | |
531 | if ((i & (TXBB_SIZE - 1)) == 0) | |
532 | wmb(); | |
533 | ||
534 | *((u32 *) (ring->buf + i)) = | |
535 | *((u32 *) (ring->bounce_buf + copy + i)); | |
536 | } | |
537 | ||
538 | for (i = copy - 4; i >= 4 ; i -= 4) { | |
539 | if ((i & (TXBB_SIZE - 1)) == 0) | |
540 | wmb(); | |
541 | ||
542 | *((u32 *) (ring->buf + index * TXBB_SIZE + i)) = | |
543 | *((u32 *) (ring->bounce_buf + i)); | |
544 | } | |
545 | ||
546 | /* Return real descriptor location */ | |
547 | return ring->buf + index * TXBB_SIZE; | |
548 | } | |
549 | ||
acea73d6 ED |
550 | /* Decide if skb can be inlined in tx descriptor to avoid dma mapping |
551 | * | |
552 | * It seems strange we do not simply use skb_copy_bits(). | |
553 | * This would allow to inline all skbs iff skb->len <= inline_thold | |
554 | * | |
555 | * Note that caller already checked skb was not a gso packet | |
556 | */ | |
7dfa4b41 | 557 | static bool is_inline(int inline_thold, const struct sk_buff *skb, |
b9d8839a | 558 | const struct skb_shared_info *shinfo, |
7dfa4b41 | 559 | void **pfrag) |
c27a02cd YP |
560 | { |
561 | void *ptr; | |
562 | ||
acea73d6 ED |
563 | if (skb->len > inline_thold || !inline_thold) |
564 | return false; | |
c27a02cd | 565 | |
acea73d6 ED |
566 | if (shinfo->nr_frags == 1) { |
567 | ptr = skb_frag_address_safe(&shinfo->frags[0]); | |
568 | if (unlikely(!ptr)) | |
569 | return false; | |
570 | *pfrag = ptr; | |
571 | return true; | |
c27a02cd | 572 | } |
acea73d6 ED |
573 | if (shinfo->nr_frags) |
574 | return false; | |
575 | return true; | |
c27a02cd YP |
576 | } |
577 | ||
7dfa4b41 | 578 | static int inline_size(const struct sk_buff *skb) |
c27a02cd YP |
579 | { |
580 | if (skb->len + CTRL_SIZE + sizeof(struct mlx4_wqe_inline_seg) | |
581 | <= MLX4_INLINE_ALIGN) | |
582 | return ALIGN(skb->len + CTRL_SIZE + | |
583 | sizeof(struct mlx4_wqe_inline_seg), 16); | |
584 | else | |
585 | return ALIGN(skb->len + CTRL_SIZE + 2 * | |
586 | sizeof(struct mlx4_wqe_inline_seg), 16); | |
587 | } | |
588 | ||
7dfa4b41 | 589 | static int get_real_size(const struct sk_buff *skb, |
b9d8839a | 590 | const struct skb_shared_info *shinfo, |
7dfa4b41 | 591 | struct net_device *dev, |
acea73d6 ED |
592 | int *lso_header_size, |
593 | bool *inline_ok, | |
594 | void **pfrag) | |
c27a02cd YP |
595 | { |
596 | struct mlx4_en_priv *priv = netdev_priv(dev); | |
c27a02cd YP |
597 | int real_size; |
598 | ||
b9d8839a | 599 | if (shinfo->gso_size) { |
acea73d6 | 600 | *inline_ok = false; |
837052d0 OG |
601 | if (skb->encapsulation) |
602 | *lso_header_size = (skb_inner_transport_header(skb) - skb->data) + inner_tcp_hdrlen(skb); | |
603 | else | |
604 | *lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
b9d8839a | 605 | real_size = CTRL_SIZE + shinfo->nr_frags * DS_SIZE + |
c27a02cd YP |
606 | ALIGN(*lso_header_size + 4, DS_SIZE); |
607 | if (unlikely(*lso_header_size != skb_headlen(skb))) { | |
608 | /* We add a segment for the skb linear buffer only if | |
609 | * it contains data */ | |
610 | if (*lso_header_size < skb_headlen(skb)) | |
611 | real_size += DS_SIZE; | |
612 | else { | |
613 | if (netif_msg_tx_err(priv)) | |
453a6082 | 614 | en_warn(priv, "Non-linear headers\n"); |
c27a02cd YP |
615 | return 0; |
616 | } | |
617 | } | |
c27a02cd YP |
618 | } else { |
619 | *lso_header_size = 0; | |
acea73d6 ED |
620 | *inline_ok = is_inline(priv->prof->inline_thold, skb, |
621 | shinfo, pfrag); | |
622 | ||
623 | if (*inline_ok) | |
c27a02cd | 624 | real_size = inline_size(skb); |
acea73d6 ED |
625 | else |
626 | real_size = CTRL_SIZE + | |
627 | (shinfo->nr_frags + 1) * DS_SIZE; | |
c27a02cd YP |
628 | } |
629 | ||
630 | return real_size; | |
631 | } | |
632 | ||
7dfa4b41 ED |
633 | static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc, |
634 | const struct sk_buff *skb, | |
b9d8839a | 635 | const struct skb_shared_info *shinfo, |
7dfa4b41 ED |
636 | int real_size, u16 *vlan_tag, |
637 | int tx_ind, void *fragptr) | |
c27a02cd YP |
638 | { |
639 | struct mlx4_wqe_inline_seg *inl = &tx_desc->inl; | |
640 | int spc = MLX4_INLINE_ALIGN - CTRL_SIZE - sizeof *inl; | |
e533ac7e | 641 | unsigned int hlen = skb_headlen(skb); |
c27a02cd YP |
642 | |
643 | if (skb->len <= spc) { | |
93591aaa EE |
644 | if (likely(skb->len >= MIN_PKT_LEN)) { |
645 | inl->byte_count = cpu_to_be32(1 << 31 | skb->len); | |
646 | } else { | |
647 | inl->byte_count = cpu_to_be32(1 << 31 | MIN_PKT_LEN); | |
648 | memset(((void *)(inl + 1)) + skb->len, 0, | |
649 | MIN_PKT_LEN - skb->len); | |
650 | } | |
e533ac7e | 651 | skb_copy_from_linear_data(skb, inl + 1, hlen); |
b9d8839a | 652 | if (shinfo->nr_frags) |
e533ac7e | 653 | memcpy(((void *)(inl + 1)) + hlen, fragptr, |
b9d8839a | 654 | skb_frag_size(&shinfo->frags[0])); |
c27a02cd YP |
655 | |
656 | } else { | |
657 | inl->byte_count = cpu_to_be32(1 << 31 | spc); | |
e533ac7e ED |
658 | if (hlen <= spc) { |
659 | skb_copy_from_linear_data(skb, inl + 1, hlen); | |
660 | if (hlen < spc) { | |
661 | memcpy(((void *)(inl + 1)) + hlen, | |
662 | fragptr, spc - hlen); | |
663 | fragptr += spc - hlen; | |
c27a02cd YP |
664 | } |
665 | inl = (void *) (inl + 1) + spc; | |
666 | memcpy(((void *)(inl + 1)), fragptr, skb->len - spc); | |
667 | } else { | |
668 | skb_copy_from_linear_data(skb, inl + 1, spc); | |
669 | inl = (void *) (inl + 1) + spc; | |
670 | skb_copy_from_linear_data_offset(skb, spc, inl + 1, | |
e533ac7e | 671 | hlen - spc); |
b9d8839a | 672 | if (shinfo->nr_frags) |
e533ac7e | 673 | memcpy(((void *)(inl + 1)) + hlen - spc, |
b9d8839a ED |
674 | fragptr, |
675 | skb_frag_size(&shinfo->frags[0])); | |
c27a02cd YP |
676 | } |
677 | ||
12b3375f | 678 | dma_wmb(); |
c27a02cd YP |
679 | inl->byte_count = cpu_to_be32(1 << 31 | (skb->len - spc)); |
680 | } | |
c27a02cd YP |
681 | } |
682 | ||
f663dd9a | 683 | u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 684 | void *accel_priv, select_queue_fallback_t fallback) |
c27a02cd | 685 | { |
bc6a4744 | 686 | struct mlx4_en_priv *priv = netdev_priv(dev); |
d317966b | 687 | u16 rings_p_up = priv->num_tx_rings_p_up; |
bc6a4744 | 688 | u8 up = 0; |
c27a02cd | 689 | |
bc6a4744 AV |
690 | if (dev->num_tc) |
691 | return skb_tx_hash(dev, skb); | |
692 | ||
df8a39de JP |
693 | if (skb_vlan_tag_present(skb)) |
694 | up = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT; | |
f813cad8 | 695 | |
99932d4f | 696 | return fallback(dev, skb) % rings_p_up + up * rings_p_up; |
c27a02cd YP |
697 | } |
698 | ||
7dfa4b41 ED |
699 | static void mlx4_bf_copy(void __iomem *dst, const void *src, |
700 | unsigned int bytecnt) | |
87a5c389 YP |
701 | { |
702 | __iowrite64_copy(dst, src, bytecnt / 8); | |
703 | } | |
704 | ||
61357325 | 705 | netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) |
c27a02cd | 706 | { |
b9d8839a | 707 | struct skb_shared_info *shinfo = skb_shinfo(skb); |
c27a02cd | 708 | struct mlx4_en_priv *priv = netdev_priv(dev); |
237a3a3b | 709 | struct device *ddev = priv->ddev; |
c27a02cd | 710 | struct mlx4_en_tx_ring *ring; |
c27a02cd YP |
711 | struct mlx4_en_tx_desc *tx_desc; |
712 | struct mlx4_wqe_data_seg *data; | |
c27a02cd YP |
713 | struct mlx4_en_tx_info *tx_info; |
714 | int tx_ind = 0; | |
715 | int nr_txbb; | |
716 | int desc_size; | |
717 | int real_size; | |
87a5c389 | 718 | u32 index, bf_index; |
c27a02cd | 719 | __be32 op_own; |
f813cad8 | 720 | u16 vlan_tag = 0; |
e38af4fa | 721 | u16 vlan_proto = 0; |
b9d8839a | 722 | int i_frag; |
c27a02cd | 723 | int lso_header_size; |
acea73d6 | 724 | void *fragptr = NULL; |
87a5c389 | 725 | bool bounce = false; |
5804283d | 726 | bool send_doorbell; |
fe971b95 | 727 | bool stop_queue; |
acea73d6 | 728 | bool inline_ok; |
f905c79e | 729 | u32 ring_cons; |
c27a02cd | 730 | |
3005ad40 YP |
731 | if (!priv->port_up) |
732 | goto tx_drop; | |
733 | ||
f905c79e ED |
734 | tx_ind = skb_get_queue_mapping(skb); |
735 | ring = priv->tx_ring[tx_ind]; | |
736 | ||
737 | /* fetch ring->cons far ahead before needing it to avoid stall */ | |
738 | ring_cons = ACCESS_ONCE(ring->cons); | |
739 | ||
acea73d6 ED |
740 | real_size = get_real_size(skb, shinfo, dev, &lso_header_size, |
741 | &inline_ok, &fragptr); | |
c27a02cd | 742 | if (unlikely(!real_size)) |
7e230913 | 743 | goto tx_drop; |
c27a02cd | 744 | |
25985edc | 745 | /* Align descriptor to TXBB size */ |
c27a02cd YP |
746 | desc_size = ALIGN(real_size, TXBB_SIZE); |
747 | nr_txbb = desc_size / TXBB_SIZE; | |
748 | if (unlikely(nr_txbb > MAX_DESC_TXBBS)) { | |
749 | if (netif_msg_tx_err(priv)) | |
453a6082 | 750 | en_warn(priv, "Oversized header or SG list\n"); |
7e230913 | 751 | goto tx_drop; |
c27a02cd YP |
752 | } |
753 | ||
e38af4fa | 754 | if (skb_vlan_tag_present(skb)) { |
df8a39de | 755 | vlan_tag = skb_vlan_tag_get(skb); |
e38af4fa HHZ |
756 | vlan_proto = be16_to_cpu(skb->vlan_proto); |
757 | } | |
c27a02cd | 758 | |
53511453 | 759 | netdev_txq_bql_enqueue_prefetchw(ring->tx_queue); |
29d40c90 | 760 | |
c27a02cd YP |
761 | /* Track current inflight packets for performance analysis */ |
762 | AVG_PERF_COUNTER(priv->pstats.inflight_avg, | |
f905c79e | 763 | (u32)(ring->prod - ring_cons - 1)); |
c27a02cd YP |
764 | |
765 | /* Packet is good - grab an index and transmit it */ | |
766 | index = ring->prod & ring->size_mask; | |
87a5c389 | 767 | bf_index = ring->prod; |
c27a02cd YP |
768 | |
769 | /* See if we have enough space for whole descriptor TXBB for setting | |
770 | * SW ownership on next descriptor; if not, use a bounce buffer. */ | |
771 | if (likely(index + nr_txbb <= ring->size)) | |
772 | tx_desc = ring->buf + index * TXBB_SIZE; | |
87a5c389 | 773 | else { |
c27a02cd | 774 | tx_desc = (struct mlx4_en_tx_desc *) ring->bounce_buf; |
87a5c389 YP |
775 | bounce = true; |
776 | } | |
c27a02cd YP |
777 | |
778 | /* Save skb in tx_info ring */ | |
779 | tx_info = &ring->tx_info[index]; | |
780 | tx_info->skb = skb; | |
781 | tx_info->nr_txbb = nr_txbb; | |
782 | ||
7dfa4b41 | 783 | data = &tx_desc->data; |
237a3a3b AV |
784 | if (lso_header_size) |
785 | data = ((void *)&tx_desc->lso + ALIGN(lso_header_size + 4, | |
786 | DS_SIZE)); | |
237a3a3b AV |
787 | |
788 | /* valid only for none inline segments */ | |
789 | tx_info->data_offset = (void *)data - (void *)tx_desc; | |
790 | ||
acea73d6 ED |
791 | tx_info->inl = inline_ok; |
792 | ||
237a3a3b | 793 | tx_info->linear = (lso_header_size < skb_headlen(skb) && |
acea73d6 | 794 | !inline_ok) ? 1 : 0; |
237a3a3b | 795 | |
b9d8839a | 796 | tx_info->nr_maps = shinfo->nr_frags + tx_info->linear; |
3d03641c | 797 | data += tx_info->nr_maps - 1; |
237a3a3b | 798 | |
acea73d6 | 799 | if (!tx_info->inl) { |
3d03641c ED |
800 | dma_addr_t dma = 0; |
801 | u32 byte_count = 0; | |
802 | ||
7dfa4b41 | 803 | /* Map fragments if any */ |
b9d8839a | 804 | for (i_frag = shinfo->nr_frags - 1; i_frag >= 0; i_frag--) { |
7dfa4b41 | 805 | const struct skb_frag_struct *frag; |
b9d8839a ED |
806 | |
807 | frag = &shinfo->frags[i_frag]; | |
3d03641c | 808 | byte_count = skb_frag_size(frag); |
237a3a3b | 809 | dma = skb_frag_dma_map(ddev, frag, |
3d03641c | 810 | 0, byte_count, |
237a3a3b AV |
811 | DMA_TO_DEVICE); |
812 | if (dma_mapping_error(ddev, dma)) | |
813 | goto tx_drop_unmap; | |
814 | ||
815 | data->addr = cpu_to_be64(dma); | |
6a4e8121 | 816 | data->lkey = ring->mr_key; |
12b3375f | 817 | dma_wmb(); |
3d03641c | 818 | data->byte_count = cpu_to_be32(byte_count); |
237a3a3b AV |
819 | --data; |
820 | } | |
821 | ||
7dfa4b41 | 822 | /* Map linear part if needed */ |
237a3a3b | 823 | if (tx_info->linear) { |
3d03641c | 824 | byte_count = skb_headlen(skb) - lso_header_size; |
5f1cd200 | 825 | |
237a3a3b AV |
826 | dma = dma_map_single(ddev, skb->data + |
827 | lso_header_size, byte_count, | |
828 | PCI_DMA_TODEVICE); | |
829 | if (dma_mapping_error(ddev, dma)) | |
830 | goto tx_drop_unmap; | |
831 | ||
832 | data->addr = cpu_to_be64(dma); | |
6a4e8121 | 833 | data->lkey = ring->mr_key; |
12b3375f | 834 | dma_wmb(); |
237a3a3b AV |
835 | data->byte_count = cpu_to_be32(byte_count); |
836 | } | |
3d03641c ED |
837 | /* tx completion can avoid cache line miss for common cases */ |
838 | tx_info->map0_dma = dma; | |
839 | tx_info->map0_byte_count = byte_count; | |
237a3a3b AV |
840 | } |
841 | ||
ec693d47 AV |
842 | /* |
843 | * For timestamping add flag to skb_shinfo and | |
844 | * set flag for further reference | |
845 | */ | |
e70602a8 | 846 | tx_info->ts_requested = 0; |
7dfa4b41 ED |
847 | if (unlikely(ring->hwtstamp_tx_type == HWTSTAMP_TX_ON && |
848 | shinfo->tx_flags & SKBTX_HW_TSTAMP)) { | |
849 | shinfo->tx_flags |= SKBTX_IN_PROGRESS; | |
ec693d47 AV |
850 | tx_info->ts_requested = 1; |
851 | } | |
852 | ||
c27a02cd YP |
853 | /* Prepare ctrl segement apart opcode+ownership, which depends on |
854 | * whether LSO is used */ | |
60d6fe99 | 855 | tx_desc->ctrl.srcrb_flags = priv->ctrl_flags; |
c27a02cd | 856 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
a4f2dacb OG |
857 | if (!skb->encapsulation) |
858 | tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | | |
859 | MLX4_WQE_CTRL_TCP_UDP_CSUM); | |
860 | else | |
861 | tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM); | |
ad04378c | 862 | ring->tx_csum++; |
c27a02cd YP |
863 | } |
864 | ||
79aeaccd | 865 | if (priv->flags & MLX4_EN_FLAG_ENABLE_HW_LOOPBACK) { |
5f1cd200 AV |
866 | struct ethhdr *ethh; |
867 | ||
213815a1 YB |
868 | /* Copy dst mac address to wqe. This allows loopback in eSwitch, |
869 | * so that VFs and PF can communicate with each other | |
870 | */ | |
871 | ethh = (struct ethhdr *)skb->data; | |
872 | tx_desc->ctrl.srcrb_flags16[0] = get_unaligned((__be16 *)ethh->h_dest); | |
873 | tx_desc->ctrl.imm = get_unaligned((__be32 *)(ethh->h_dest + 2)); | |
874 | } | |
875 | ||
c27a02cd YP |
876 | /* Handle LSO (TSO) packets */ |
877 | if (lso_header_size) { | |
b9d8839a ED |
878 | int i; |
879 | ||
c27a02cd YP |
880 | /* Mark opcode as LSO */ |
881 | op_own = cpu_to_be32(MLX4_OPCODE_LSO | (1 << 6)) | | |
882 | ((ring->prod & ring->size) ? | |
883 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); | |
884 | ||
885 | /* Fill in the LSO prefix */ | |
886 | tx_desc->lso.mss_hdr_size = cpu_to_be32( | |
b9d8839a | 887 | shinfo->gso_size << 16 | lso_header_size); |
c27a02cd YP |
888 | |
889 | /* Copy headers; | |
890 | * note that we already verified that it is linear */ | |
891 | memcpy(tx_desc->lso.header, skb->data, lso_header_size); | |
c27a02cd | 892 | |
9fab426d | 893 | ring->tso_packets++; |
b9d8839a ED |
894 | |
895 | i = ((skb->len - lso_header_size) / shinfo->gso_size) + | |
896 | !!((skb->len - lso_header_size) % shinfo->gso_size); | |
5b263f53 | 897 | tx_info->nr_bytes = skb->len + (i - 1) * lso_header_size; |
c27a02cd YP |
898 | ring->packets += i; |
899 | } else { | |
900 | /* Normal (Non LSO) packet */ | |
901 | op_own = cpu_to_be32(MLX4_OPCODE_SEND) | | |
902 | ((ring->prod & ring->size) ? | |
903 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); | |
5b263f53 | 904 | tx_info->nr_bytes = max_t(unsigned int, skb->len, ETH_ZLEN); |
c27a02cd | 905 | ring->packets++; |
c27a02cd | 906 | } |
5b263f53 YP |
907 | ring->bytes += tx_info->nr_bytes; |
908 | netdev_tx_sent_queue(ring->tx_queue, tx_info->nr_bytes); | |
c27a02cd YP |
909 | AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, skb->len); |
910 | ||
acea73d6 | 911 | if (tx_info->inl) |
b9d8839a ED |
912 | build_inline_wqe(tx_desc, skb, shinfo, real_size, &vlan_tag, |
913 | tx_ind, fragptr); | |
c27a02cd | 914 | |
837052d0 OG |
915 | if (skb->encapsulation) { |
916 | struct iphdr *ipv4 = (struct iphdr *)skb_inner_network_header(skb); | |
917 | if (ipv4->protocol == IPPROTO_TCP || ipv4->protocol == IPPROTO_UDP) | |
918 | op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP | MLX4_WQE_CTRL_ILP); | |
919 | else | |
920 | op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP); | |
921 | } | |
922 | ||
c27a02cd YP |
923 | ring->prod += nr_txbb; |
924 | ||
925 | /* If we used a bounce buffer then copy descriptor back into place */ | |
7dfa4b41 | 926 | if (unlikely(bounce)) |
c27a02cd YP |
927 | tx_desc = mlx4_en_bounce_to_desc(priv, ring, index, desc_size); |
928 | ||
eb0cabbd AV |
929 | skb_tx_timestamp(skb); |
930 | ||
fe971b95 | 931 | /* Check available TXBBs And 2K spare for prefetch */ |
488a9b48 | 932 | stop_queue = mlx4_en_is_tx_ring_full(ring); |
fe971b95 ED |
933 | if (unlikely(stop_queue)) { |
934 | netif_tx_stop_queue(ring->tx_queue); | |
935 | ring->queue_stopped++; | |
936 | } | |
5804283d ED |
937 | send_doorbell = !skb->xmit_more || netif_xmit_stopped(ring->tx_queue); |
938 | ||
6a4e8121 ED |
939 | real_size = (real_size / 16) & 0x3f; |
940 | ||
5804283d | 941 | if (ring->bf_enabled && desc_size <= MAX_BF && !bounce && |
df8a39de | 942 | !skb_vlan_tag_present(skb) && send_doorbell) { |
6a4e8121 ED |
943 | tx_desc->ctrl.bf_qpn = ring->doorbell_qpn | |
944 | cpu_to_be32(real_size); | |
ec570940 | 945 | |
87a5c389 | 946 | op_own |= htonl((bf_index & 0xffff) << 8); |
5804283d ED |
947 | /* Ensure new descriptor hits memory |
948 | * before setting ownership of this descriptor to HW | |
949 | */ | |
12b3375f | 950 | dma_wmb(); |
87a5c389 | 951 | tx_desc->ctrl.owner_opcode = op_own; |
c27a02cd | 952 | |
87a5c389 YP |
953 | wmb(); |
954 | ||
7dfa4b41 ED |
955 | mlx4_bf_copy(ring->bf.reg + ring->bf.offset, &tx_desc->ctrl, |
956 | desc_size); | |
87a5c389 YP |
957 | |
958 | wmb(); | |
959 | ||
960 | ring->bf.offset ^= ring->bf.buf_size; | |
961 | } else { | |
7dfa4b41 | 962 | tx_desc->ctrl.vlan_tag = cpu_to_be16(vlan_tag); |
e38af4fa HHZ |
963 | if (vlan_proto == ETH_P_8021AD) |
964 | tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_SVLAN; | |
965 | else if (vlan_proto == ETH_P_8021Q) | |
966 | tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_CVLAN; | |
092bf0fc JM |
967 | else |
968 | tx_desc->ctrl.ins_vlan = 0; | |
e38af4fa | 969 | |
7dfa4b41 ED |
970 | tx_desc->ctrl.fence_size = real_size; |
971 | ||
5804283d ED |
972 | /* Ensure new descriptor hits memory |
973 | * before setting ownership of this descriptor to HW | |
974 | */ | |
12b3375f | 975 | dma_wmb(); |
87a5c389 | 976 | tx_desc->ctrl.owner_opcode = op_own; |
5804283d ED |
977 | if (send_doorbell) { |
978 | wmb(); | |
492f5add AV |
979 | /* Since there is no iowrite*_native() that writes the |
980 | * value as is, without byteswapping - using the one | |
981 | * the doesn't do byteswapping in the relevant arch | |
982 | * endianness. | |
983 | */ | |
984 | #if defined(__LITTLE_ENDIAN) | |
985 | iowrite32( | |
986 | #else | |
987 | iowrite32be( | |
988 | #endif | |
989 | ring->doorbell_qpn, | |
6a4e8121 | 990 | ring->bf.uar->map + MLX4_SEND_DOORBELL); |
9fab426d ED |
991 | } else { |
992 | ring->xmit_more++; | |
5804283d | 993 | } |
87a5c389 | 994 | } |
c27a02cd | 995 | |
fe971b95 ED |
996 | if (unlikely(stop_queue)) { |
997 | /* If queue was emptied after the if (stop_queue) , and before | |
998 | * the netif_tx_stop_queue() - need to wake the queue, | |
999 | * or else it will remain stopped forever. | |
1000 | * Need a memory barrier to make sure ring->cons was not | |
1001 | * updated before queue was stopped. | |
1002 | */ | |
1003 | smp_rmb(); | |
1004 | ||
1005 | ring_cons = ACCESS_ONCE(ring->cons); | |
488a9b48 | 1006 | if (unlikely(!mlx4_en_is_tx_ring_full(ring))) { |
fe971b95 ED |
1007 | netif_tx_wake_queue(ring->tx_queue); |
1008 | ring->wake_queue++; | |
1009 | } | |
1010 | } | |
ec634fe3 | 1011 | return NETDEV_TX_OK; |
7e230913 | 1012 | |
237a3a3b AV |
1013 | tx_drop_unmap: |
1014 | en_err(priv, "DMA mapping error\n"); | |
1015 | ||
b9d8839a ED |
1016 | while (++i_frag < shinfo->nr_frags) { |
1017 | ++data; | |
237a3a3b AV |
1018 | dma_unmap_page(ddev, (dma_addr_t) be64_to_cpu(data->addr), |
1019 | be32_to_cpu(data->byte_count), | |
1020 | PCI_DMA_TODEVICE); | |
1021 | } | |
1022 | ||
7e230913 YP |
1023 | tx_drop: |
1024 | dev_kfree_skb_any(skb); | |
1025 | priv->stats.tx_dropped++; | |
1026 | return NETDEV_TX_OK; | |
c27a02cd YP |
1027 | } |
1028 |