Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 37 | #include <linux/mlx4/qp.h> |
| 38 | #include <linux/skbuff.h> |
| 39 | #include <linux/if_vlan.h> |
Eric Dumazet | 29d40c9 | 2014-10-05 12:35:14 +0300 | [diff] [blame] | 40 | #include <linux/prefetch.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 41 | #include <linux/vmalloc.h> |
Yevgeny Petrilin | fa37a95 | 2010-08-24 03:46:46 +0000 | [diff] [blame] | 42 | #include <linux/tcp.h> |
Or Gerlitz | 837052d | 2013-12-23 16:09:44 +0200 | [diff] [blame] | 43 | #include <linux/ip.h> |
Paul Gortmaker | 6eb07ca | 2011-09-15 19:46:05 -0400 | [diff] [blame] | 44 | #include <linux/moduleparam.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 45 | |
| 46 | #include "mlx4_en.h" |
| 47 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 48 | int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, |
Eugenia Emantayev | ddae034 | 2014-12-11 10:57:54 +0200 | [diff] [blame] | 49 | struct mlx4_en_tx_ring **pring, u32 size, |
Ido Shamay | d03a68f | 2013-12-19 21:20:14 +0200 | [diff] [blame] | 50 | u16 stride, int node, int queue_index) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 51 | { |
| 52 | struct mlx4_en_dev *mdev = priv->mdev; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 53 | struct mlx4_en_tx_ring *ring; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 54 | int tmp; |
| 55 | int err; |
| 56 | |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 57 | ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node); |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 58 | if (!ring) { |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 59 | ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| 60 | if (!ring) { |
| 61 | en_err(priv, "Failed allocating TX ring\n"); |
| 62 | return -ENOMEM; |
| 63 | } |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 64 | } |
| 65 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 66 | ring->size = size; |
| 67 | ring->size_mask = size - 1; |
| 68 | ring->stride = stride; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 69 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 70 | tmp = size * sizeof(struct mlx4_en_tx_info); |
Eric Dumazet | dc9b06d | 2014-10-05 12:35:12 +0300 | [diff] [blame] | 71 | ring->tx_info = kmalloc_node(tmp, GFP_KERNEL | __GFP_NOWARN, node); |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 72 | if (!ring->tx_info) { |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 73 | ring->tx_info = vmalloc(tmp); |
| 74 | if (!ring->tx_info) { |
| 75 | err = -ENOMEM; |
| 76 | goto err_ring; |
| 77 | } |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 78 | } |
Joe Perches | e404dec | 2012-01-29 12:56:23 +0000 | [diff] [blame] | 79 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 80 | en_dbg(DRV, priv, "Allocated tx_info ring at addr:%p size:%d\n", |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 81 | ring->tx_info, tmp); |
| 82 | |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 83 | ring->bounce_buf = kmalloc_node(MAX_DESC_SIZE, GFP_KERNEL, node); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 84 | if (!ring->bounce_buf) { |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 85 | ring->bounce_buf = kmalloc(MAX_DESC_SIZE, GFP_KERNEL); |
| 86 | if (!ring->bounce_buf) { |
| 87 | err = -ENOMEM; |
| 88 | goto err_info; |
| 89 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 90 | } |
| 91 | ring->buf_size = ALIGN(size * ring->stride, MLX4_EN_PAGE_SIZE); |
| 92 | |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 93 | /* Allocate HW buffers on provided NUMA node */ |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 94 | set_dev_node(&mdev->dev->persist->pdev->dev, node); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 95 | err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres, ring->buf_size, |
| 96 | 2 * PAGE_SIZE); |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 97 | set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 98 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 99 | en_err(priv, "Failed allocating hwq resources\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 100 | goto err_bounce; |
| 101 | } |
| 102 | |
| 103 | err = mlx4_en_map_buffer(&ring->wqres.buf); |
| 104 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 105 | en_err(priv, "Failed to map TX buffer\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 106 | goto err_hwq_res; |
| 107 | } |
| 108 | |
| 109 | ring->buf = ring->wqres.buf.direct.buf; |
| 110 | |
Joe Perches | 1a91de2 | 2014-05-07 12:52:57 -0700 | [diff] [blame] | 111 | en_dbg(DRV, priv, "Allocated TX ring (addr:%p) - buf:%p size:%d buf_size:%d dma:%llx\n", |
| 112 | ring, ring->buf, ring->size, ring->buf_size, |
| 113 | (unsigned long long) ring->wqres.buf.direct.map); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 114 | |
Eugenia Emantayev | ddae034 | 2014-12-11 10:57:54 +0200 | [diff] [blame] | 115 | err = mlx4_qp_reserve_range(mdev->dev, 1, 1, &ring->qpn, |
| 116 | MLX4_RESERVE_ETH_BF_QP); |
| 117 | if (err) { |
| 118 | en_err(priv, "failed reserving qp for TX ring\n"); |
| 119 | goto err_map; |
| 120 | } |
| 121 | |
Jiri Kosina | 40f2287 | 2014-05-11 15:15:12 +0300 | [diff] [blame] | 122 | err = mlx4_qp_alloc(mdev->dev, ring->qpn, &ring->qp, GFP_KERNEL); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 123 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 124 | en_err(priv, "Failed allocating qp %d\n", ring->qpn); |
Eugenia Emantayev | ddae034 | 2014-12-11 10:57:54 +0200 | [diff] [blame] | 125 | goto err_reserve; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 126 | } |
Yevgeny Petrilin | 966508f | 2009-04-20 04:30:03 +0000 | [diff] [blame] | 127 | ring->qp.event = mlx4_en_sqp_event; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 128 | |
Eugenia Emantayev | 163561a | 2013-11-07 12:19:54 +0200 | [diff] [blame] | 129 | err = mlx4_bf_alloc(mdev->dev, &ring->bf, node); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 130 | if (err) { |
Joe Perches | 1a91de2 | 2014-05-07 12:52:57 -0700 | [diff] [blame] | 131 | en_dbg(DRV, priv, "working without blueflame (%d)\n", err); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 132 | ring->bf.uar = &mdev->priv_uar; |
| 133 | ring->bf.uar->map = mdev->uar_map; |
| 134 | ring->bf_enabled = false; |
Amir Vadai | 0fef9d0 | 2014-07-22 15:44:10 +0300 | [diff] [blame] | 135 | ring->bf_alloced = false; |
| 136 | priv->pflags &= ~MLX4_EN_PRIV_FLAGS_BLUEFLAME; |
| 137 | } else { |
| 138 | ring->bf_alloced = true; |
| 139 | ring->bf_enabled = !!(priv->pflags & |
| 140 | MLX4_EN_PRIV_FLAGS_BLUEFLAME); |
| 141 | } |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 142 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 143 | ring->hwtstamp_tx_type = priv->hwtstamp_config.tx_type; |
Ido Shamay | d03a68f | 2013-12-19 21:20:14 +0200 | [diff] [blame] | 144 | ring->queue_index = queue_index; |
| 145 | |
Benjamin Poirier | 42eab00 | 2015-04-28 14:49:29 -0700 | [diff] [blame] | 146 | if (queue_index < priv->num_tx_rings_p_up) |
Rusty Russell | f36963c | 2015-05-09 03:14:13 +0930 | [diff] [blame] | 147 | cpumask_set_cpu(cpumask_local_spread(queue_index, |
| 148 | priv->mdev->dev->numa_node), |
| 149 | &ring->affinity_mask); |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 150 | |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 151 | *pring = ring; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 152 | return 0; |
| 153 | |
Eugenia Emantayev | ddae034 | 2014-12-11 10:57:54 +0200 | [diff] [blame] | 154 | err_reserve: |
| 155 | mlx4_qp_release_range(mdev->dev, ring->qpn, 1); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 156 | err_map: |
| 157 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
| 158 | err_hwq_res: |
| 159 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| 160 | err_bounce: |
| 161 | kfree(ring->bounce_buf); |
| 162 | ring->bounce_buf = NULL; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 163 | err_info: |
Eric Dumazet | dc9b06d | 2014-10-05 12:35:12 +0300 | [diff] [blame] | 164 | kvfree(ring->tx_info); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 165 | ring->tx_info = NULL; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 166 | err_ring: |
| 167 | kfree(ring); |
| 168 | *pring = NULL; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 169 | return err; |
| 170 | } |
| 171 | |
| 172 | void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv, |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 173 | struct mlx4_en_tx_ring **pring) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 174 | { |
| 175 | struct mlx4_en_dev *mdev = priv->mdev; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 176 | struct mlx4_en_tx_ring *ring = *pring; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 177 | en_dbg(DRV, priv, "Destroying tx ring, qpn: %d\n", ring->qpn); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 178 | |
Amir Vadai | 0fef9d0 | 2014-07-22 15:44:10 +0300 | [diff] [blame] | 179 | if (ring->bf_alloced) |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 180 | mlx4_bf_free(mdev->dev, &ring->bf); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 181 | mlx4_qp_remove(mdev->dev, &ring->qp); |
| 182 | mlx4_qp_free(mdev->dev, &ring->qp); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 183 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
| 184 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| 185 | kfree(ring->bounce_buf); |
| 186 | ring->bounce_buf = NULL; |
Eric Dumazet | dc9b06d | 2014-10-05 12:35:12 +0300 | [diff] [blame] | 187 | kvfree(ring->tx_info); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 188 | ring->tx_info = NULL; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 189 | kfree(ring); |
| 190 | *pring = NULL; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv, |
| 194 | struct mlx4_en_tx_ring *ring, |
Amir Vadai | 0e98b52 | 2012-04-04 21:33:24 +0000 | [diff] [blame] | 195 | int cq, int user_prio) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 196 | { |
| 197 | struct mlx4_en_dev *mdev = priv->mdev; |
| 198 | int err; |
| 199 | |
| 200 | ring->cqn = cq; |
| 201 | ring->prod = 0; |
| 202 | ring->cons = 0xffffffff; |
| 203 | ring->last_nr_txbb = 1; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 204 | memset(ring->tx_info, 0, ring->size * sizeof(struct mlx4_en_tx_info)); |
| 205 | memset(ring->buf, 0, ring->buf_size); |
| 206 | |
| 207 | ring->qp_state = MLX4_QP_STATE_RST; |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 208 | ring->doorbell_qpn = cpu_to_be32(ring->qp.qpn << 8); |
| 209 | ring->mr_key = cpu_to_be32(mdev->mr.key); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 210 | |
| 211 | mlx4_en_fill_qp_context(priv, ring->size, ring->stride, 1, 0, ring->qpn, |
Amir Vadai | 0e98b52 | 2012-04-04 21:33:24 +0000 | [diff] [blame] | 212 | ring->cqn, user_prio, &ring->context); |
Amir Vadai | 0fef9d0 | 2014-07-22 15:44:10 +0300 | [diff] [blame] | 213 | if (ring->bf_alloced) |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 214 | ring->context.usr_page = cpu_to_be32(ring->bf.uar->index); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 215 | |
| 216 | err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, &ring->context, |
| 217 | &ring->qp, &ring->qp_state); |
Benjamin Poirier | 42eab00 | 2015-04-28 14:49:29 -0700 | [diff] [blame] | 218 | if (!cpumask_empty(&ring->affinity_mask)) |
Ido Shamay | d03a68f | 2013-12-19 21:20:14 +0200 | [diff] [blame] | 219 | netif_set_xps_queue(priv->dev, &ring->affinity_mask, |
| 220 | ring->queue_index); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 221 | |
| 222 | return err; |
| 223 | } |
| 224 | |
| 225 | void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv, |
| 226 | struct mlx4_en_tx_ring *ring) |
| 227 | { |
| 228 | struct mlx4_en_dev *mdev = priv->mdev; |
| 229 | |
| 230 | mlx4_qp_modify(mdev->dev, NULL, ring->qp_state, |
| 231 | MLX4_QP_STATE_RST, NULL, 0, 0, &ring->qp); |
| 232 | } |
| 233 | |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 234 | static void mlx4_en_stamp_wqe(struct mlx4_en_priv *priv, |
| 235 | struct mlx4_en_tx_ring *ring, int index, |
| 236 | u8 owner) |
| 237 | { |
| 238 | __be32 stamp = cpu_to_be32(STAMP_VAL | (!!owner << STAMP_SHIFT)); |
| 239 | struct mlx4_en_tx_desc *tx_desc = ring->buf + index * TXBB_SIZE; |
| 240 | struct mlx4_en_tx_info *tx_info = &ring->tx_info[index]; |
| 241 | void *end = ring->buf + ring->buf_size; |
| 242 | __be32 *ptr = (__be32 *)tx_desc; |
| 243 | int i; |
| 244 | |
| 245 | /* Optimize the common case when there are no wraparounds */ |
| 246 | if (likely((void *)tx_desc + tx_info->nr_txbb * TXBB_SIZE <= end)) { |
| 247 | /* Stamp the freed descriptor */ |
| 248 | for (i = 0; i < tx_info->nr_txbb * TXBB_SIZE; |
| 249 | i += STAMP_STRIDE) { |
| 250 | *ptr = stamp; |
| 251 | ptr += STAMP_DWORDS; |
| 252 | } |
| 253 | } else { |
| 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 | if ((void *)ptr >= end) { |
| 260 | ptr = ring->buf; |
| 261 | stamp ^= cpu_to_be32(0x80000000); |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 267 | |
| 268 | static u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv, |
| 269 | struct mlx4_en_tx_ring *ring, |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 270 | int index, u8 owner, u64 timestamp) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 271 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 272 | struct mlx4_en_tx_info *tx_info = &ring->tx_info[index]; |
| 273 | struct mlx4_en_tx_desc *tx_desc = ring->buf + index * TXBB_SIZE; |
| 274 | struct mlx4_wqe_data_seg *data = (void *) tx_desc + tx_info->data_offset; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 275 | void *end = ring->buf + ring->buf_size; |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 276 | struct sk_buff *skb = tx_info->skb; |
| 277 | int nr_maps = tx_info->nr_maps; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 278 | int i; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 279 | |
Eric Dumazet | 29d40c9 | 2014-10-05 12:35:14 +0300 | [diff] [blame] | 280 | /* We do not touch skb here, so prefetch skb->users location |
| 281 | * to speedup consume_skb() |
| 282 | */ |
| 283 | prefetchw(&skb->users); |
| 284 | |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 285 | if (unlikely(timestamp)) { |
| 286 | struct skb_shared_hwtstamps hwts; |
| 287 | |
| 288 | mlx4_en_fill_hwtstamps(priv->mdev, &hwts, timestamp); |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 289 | skb_tstamp_tx(skb, &hwts); |
| 290 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 291 | |
| 292 | /* Optimize the common case when there are no wraparounds */ |
| 293 | if (likely((void *) tx_desc + tx_info->nr_txbb * TXBB_SIZE <= end)) { |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 294 | if (!tx_info->inl) { |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 295 | if (tx_info->linear) |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 296 | dma_unmap_single(priv->ddev, |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 297 | tx_info->map0_dma, |
| 298 | tx_info->map0_byte_count, |
| 299 | PCI_DMA_TODEVICE); |
| 300 | else |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 301 | dma_unmap_page(priv->ddev, |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 302 | tx_info->map0_dma, |
| 303 | tx_info->map0_byte_count, |
| 304 | PCI_DMA_TODEVICE); |
| 305 | for (i = 1; i < nr_maps; i++) { |
| 306 | data++; |
| 307 | dma_unmap_page(priv->ddev, |
| 308 | (dma_addr_t)be64_to_cpu(data->addr), |
| 309 | be32_to_cpu(data->byte_count), |
| 310 | PCI_DMA_TODEVICE); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 311 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 312 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 313 | } else { |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 314 | if (!tx_info->inl) { |
| 315 | if ((void *) data >= end) { |
Joe Perches | 43d620c | 2011-06-16 19:08:06 +0000 | [diff] [blame] | 316 | data = ring->buf + ((void *)data - end); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 317 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 318 | |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 319 | if (tx_info->linear) |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 320 | dma_unmap_single(priv->ddev, |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 321 | tx_info->map0_dma, |
| 322 | tx_info->map0_byte_count, |
| 323 | PCI_DMA_TODEVICE); |
| 324 | else |
| 325 | dma_unmap_page(priv->ddev, |
| 326 | tx_info->map0_dma, |
| 327 | tx_info->map0_byte_count, |
| 328 | PCI_DMA_TODEVICE); |
| 329 | for (i = 1; i < nr_maps; i++) { |
| 330 | data++; |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 331 | /* Check for wraparound before unmapping */ |
| 332 | if ((void *) data >= end) |
Joe Perches | 43d620c | 2011-06-16 19:08:06 +0000 | [diff] [blame] | 333 | data = ring->buf; |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 334 | dma_unmap_page(priv->ddev, |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 335 | (dma_addr_t)be64_to_cpu(data->addr), |
| 336 | be32_to_cpu(data->byte_count), |
| 337 | PCI_DMA_TODEVICE); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 338 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 339 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 340 | } |
Rick Jones | b89df95 | 2014-09-03 09:18:00 -0700 | [diff] [blame] | 341 | dev_consume_skb_any(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 342 | return tx_info->nr_txbb; |
| 343 | } |
| 344 | |
| 345 | |
| 346 | int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring) |
| 347 | { |
| 348 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 349 | int cnt = 0; |
| 350 | |
| 351 | /* Skip last polled descriptor */ |
| 352 | ring->cons += ring->last_nr_txbb; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 353 | en_dbg(DRV, priv, "Freeing Tx buf - cons:0x%x prod:0x%x\n", |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 354 | ring->cons, ring->prod); |
| 355 | |
| 356 | if ((u32) (ring->prod - ring->cons) > ring->size) { |
| 357 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 358 | en_warn(priv, "Tx consumer passed producer!\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | while (ring->cons != ring->prod) { |
| 363 | ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring, |
| 364 | ring->cons & ring->size_mask, |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 365 | !!(ring->cons & ring->size), 0); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 366 | ring->cons += ring->last_nr_txbb; |
| 367 | cnt++; |
| 368 | } |
| 369 | |
Tom Herbert | 41b7492 | 2013-02-06 07:58:41 +0000 | [diff] [blame] | 370 | netdev_tx_reset_queue(ring->tx_queue); |
| 371 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 372 | if (cnt) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 373 | en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 374 | |
| 375 | return cnt; |
| 376 | } |
| 377 | |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 378 | static bool mlx4_en_process_tx_cq(struct net_device *dev, |
| 379 | struct mlx4_en_cq *cq) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 380 | { |
| 381 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 382 | struct mlx4_cq *mcq = &cq->mcq; |
Eugenia Emantayev | 41d942d | 2013-11-07 12:19:52 +0200 | [diff] [blame] | 383 | struct mlx4_en_tx_ring *ring = priv->tx_ring[cq->ring]; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 384 | struct mlx4_cqe *cqe; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 385 | u16 index; |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 386 | u16 new_index, ring_index, stamp_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 387 | u32 txbbs_skipped = 0; |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 388 | u32 txbbs_stamp = 0; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 389 | u32 cons_index = mcq->cons_index; |
| 390 | int size = cq->size; |
| 391 | u32 size_mask = ring->size_mask; |
| 392 | struct mlx4_cqe *buf = cq->buf; |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 393 | u32 packets = 0; |
| 394 | u32 bytes = 0; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 395 | int factor = priv->cqe_factor; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 396 | u64 timestamp = 0; |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 397 | int done = 0; |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 398 | int budget = priv->tx_work_limit; |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 399 | u32 last_nr_txbb; |
| 400 | u32 ring_cons; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 401 | |
| 402 | if (!priv->port_up) |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 403 | return true; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 404 | |
Eric Dumazet | 5351145 | 2014-10-08 08:19:27 -0700 | [diff] [blame] | 405 | netdev_txq_bql_complete_prefetchw(ring->tx_queue); |
| 406 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 407 | index = cons_index & size_mask; |
Ido Shamay | b1b6b4d | 2014-09-18 11:51:01 +0300 | [diff] [blame] | 408 | cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor; |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 409 | last_nr_txbb = ACCESS_ONCE(ring->last_nr_txbb); |
| 410 | ring_cons = ACCESS_ONCE(ring->cons); |
| 411 | ring_index = ring_cons & size_mask; |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 412 | stamp_index = ring_index; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 413 | |
| 414 | /* Process all completed CQEs */ |
| 415 | while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK, |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 416 | cons_index & size) && (done < budget)) { |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 417 | /* |
| 418 | * make sure we read the CQE after we read the |
| 419 | * ownership bit |
| 420 | */ |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 421 | dma_rmb(); |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 422 | |
Amir Vadai | bd2f631 | 2013-08-21 10:08:57 +0300 | [diff] [blame] | 423 | if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == |
| 424 | MLX4_CQE_OPCODE_ERROR)) { |
| 425 | struct mlx4_err_cqe *cqe_err = (struct mlx4_err_cqe *)cqe; |
| 426 | |
| 427 | en_err(priv, "CQE error - vendor syndrome: 0x%x syndrome: 0x%x\n", |
| 428 | cqe_err->vendor_err_syndrome, |
| 429 | cqe_err->syndrome); |
| 430 | } |
| 431 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 432 | /* Skip over last polled CQE */ |
| 433 | new_index = be16_to_cpu(cqe->wqe_index) & size_mask; |
| 434 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 435 | do { |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 436 | txbbs_skipped += last_nr_txbb; |
| 437 | ring_index = (ring_index + last_nr_txbb) & size_mask; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 438 | if (ring->tx_info[ring_index].ts_requested) |
| 439 | timestamp = mlx4_en_get_cqe_ts(cqe); |
| 440 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 441 | /* free next descriptor */ |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 442 | last_nr_txbb = mlx4_en_free_tx_desc( |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 443 | priv, ring, ring_index, |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 444 | !!((ring_cons + txbbs_skipped) & |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 445 | ring->size), timestamp); |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 446 | |
| 447 | mlx4_en_stamp_wqe(priv, ring, stamp_index, |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 448 | !!((ring_cons + txbbs_stamp) & |
Eugenia Emantayev | 2d4b646 | 2013-07-25 19:21:23 +0300 | [diff] [blame] | 449 | ring->size)); |
| 450 | stamp_index = ring_index; |
| 451 | txbbs_stamp = txbbs_skipped; |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 452 | packets++; |
| 453 | bytes += ring->tx_info[ring_index].nr_bytes; |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 454 | } while ((++done < budget) && (ring_index != new_index)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 455 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 456 | ++cons_index; |
| 457 | index = cons_index & size_mask; |
Ido Shamay | b1b6b4d | 2014-09-18 11:51:01 +0300 | [diff] [blame] | 458 | cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 459 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 460 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 461 | |
| 462 | /* |
| 463 | * To prevent CQ overflow we first update CQ consumer and only then |
| 464 | * the ring consumer. |
| 465 | */ |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 466 | mcq->cons_index = cons_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 467 | mlx4_cq_set_ci(mcq); |
| 468 | wmb(); |
Eric Dumazet | fb1843e | 2014-10-05 12:35:15 +0300 | [diff] [blame] | 469 | |
| 470 | /* we want to dirty this cache line once */ |
| 471 | ACCESS_ONCE(ring->last_nr_txbb) = last_nr_txbb; |
| 472 | ACCESS_ONCE(ring->cons) = ring_cons + txbbs_skipped; |
| 473 | |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 474 | netdev_tx_completed_queue(ring->tx_queue, packets, bytes); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 475 | |
Yevgeny Petrilin | c18520b | 2012-08-03 00:38:37 +0000 | [diff] [blame] | 476 | /* |
| 477 | * Wakeup Tx queue if this stopped, and at least 1 packet |
| 478 | * was completed |
| 479 | */ |
| 480 | if (netif_tx_queue_stopped(ring->tx_queue) && txbbs_skipped > 0) { |
| 481 | netif_tx_wake_queue(ring->tx_queue); |
Eugenia Emantayev | 15bffdf | 2014-03-02 10:25:00 +0200 | [diff] [blame] | 482 | ring->wake_queue++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 483 | } |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 484 | return done < budget; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | void mlx4_en_tx_irq(struct mlx4_cq *mcq) |
| 488 | { |
| 489 | struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq); |
| 490 | struct mlx4_en_priv *priv = netdev_priv(cq->dev); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 491 | |
Eric Dumazet | 477b35b | 2014-10-29 16:54:45 -0700 | [diff] [blame] | 492 | if (likely(priv->port_up)) |
| 493 | napi_schedule_irqoff(&cq->napi); |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 494 | else |
| 495 | mlx4_en_arm_cq(priv, cq); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 496 | } |
| 497 | |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 498 | /* TX CQ polling - called by NAPI */ |
| 499 | int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget) |
| 500 | { |
| 501 | struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi); |
| 502 | struct net_device *dev = cq->dev; |
| 503 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 504 | int clean_complete; |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 505 | |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 506 | clean_complete = mlx4_en_process_tx_cq(dev, cq); |
| 507 | if (!clean_complete) |
| 508 | return budget; |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 509 | |
Amir Vadai | fbc6daf | 2014-07-08 11:28:12 +0300 | [diff] [blame] | 510 | napi_complete(napi); |
| 511 | mlx4_en_arm_cq(priv, cq); |
| 512 | |
| 513 | return 0; |
Eugenia Emantayev | 0276a33 | 2013-12-19 21:20:17 +0200 | [diff] [blame] | 514 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 515 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 516 | static struct mlx4_en_tx_desc *mlx4_en_bounce_to_desc(struct mlx4_en_priv *priv, |
| 517 | struct mlx4_en_tx_ring *ring, |
| 518 | u32 index, |
| 519 | unsigned int desc_size) |
| 520 | { |
| 521 | u32 copy = (ring->size - index) * TXBB_SIZE; |
| 522 | int i; |
| 523 | |
| 524 | for (i = desc_size - copy - 4; i >= 0; i -= 4) { |
| 525 | if ((i & (TXBB_SIZE - 1)) == 0) |
| 526 | wmb(); |
| 527 | |
| 528 | *((u32 *) (ring->buf + i)) = |
| 529 | *((u32 *) (ring->bounce_buf + copy + i)); |
| 530 | } |
| 531 | |
| 532 | for (i = copy - 4; i >= 4 ; i -= 4) { |
| 533 | if ((i & (TXBB_SIZE - 1)) == 0) |
| 534 | wmb(); |
| 535 | |
| 536 | *((u32 *) (ring->buf + index * TXBB_SIZE + i)) = |
| 537 | *((u32 *) (ring->bounce_buf + i)); |
| 538 | } |
| 539 | |
| 540 | /* Return real descriptor location */ |
| 541 | return ring->buf + index * TXBB_SIZE; |
| 542 | } |
| 543 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 544 | /* Decide if skb can be inlined in tx descriptor to avoid dma mapping |
| 545 | * |
| 546 | * It seems strange we do not simply use skb_copy_bits(). |
| 547 | * This would allow to inline all skbs iff skb->len <= inline_thold |
| 548 | * |
| 549 | * Note that caller already checked skb was not a gso packet |
| 550 | */ |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 551 | static bool is_inline(int inline_thold, const struct sk_buff *skb, |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 552 | const struct skb_shared_info *shinfo, |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 553 | void **pfrag) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 554 | { |
| 555 | void *ptr; |
| 556 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 557 | if (skb->len > inline_thold || !inline_thold) |
| 558 | return false; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 559 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 560 | if (shinfo->nr_frags == 1) { |
| 561 | ptr = skb_frag_address_safe(&shinfo->frags[0]); |
| 562 | if (unlikely(!ptr)) |
| 563 | return false; |
| 564 | *pfrag = ptr; |
| 565 | return true; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 566 | } |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 567 | if (shinfo->nr_frags) |
| 568 | return false; |
| 569 | return true; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 570 | } |
| 571 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 572 | static int inline_size(const struct sk_buff *skb) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 573 | { |
| 574 | if (skb->len + CTRL_SIZE + sizeof(struct mlx4_wqe_inline_seg) |
| 575 | <= MLX4_INLINE_ALIGN) |
| 576 | return ALIGN(skb->len + CTRL_SIZE + |
| 577 | sizeof(struct mlx4_wqe_inline_seg), 16); |
| 578 | else |
| 579 | return ALIGN(skb->len + CTRL_SIZE + 2 * |
| 580 | sizeof(struct mlx4_wqe_inline_seg), 16); |
| 581 | } |
| 582 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 583 | static int get_real_size(const struct sk_buff *skb, |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 584 | const struct skb_shared_info *shinfo, |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 585 | struct net_device *dev, |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 586 | int *lso_header_size, |
| 587 | bool *inline_ok, |
| 588 | void **pfrag) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 589 | { |
| 590 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 591 | int real_size; |
| 592 | |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 593 | if (shinfo->gso_size) { |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 594 | *inline_ok = false; |
Or Gerlitz | 837052d | 2013-12-23 16:09:44 +0200 | [diff] [blame] | 595 | if (skb->encapsulation) |
| 596 | *lso_header_size = (skb_inner_transport_header(skb) - skb->data) + inner_tcp_hdrlen(skb); |
| 597 | else |
| 598 | *lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb); |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 599 | real_size = CTRL_SIZE + shinfo->nr_frags * DS_SIZE + |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 600 | ALIGN(*lso_header_size + 4, DS_SIZE); |
| 601 | if (unlikely(*lso_header_size != skb_headlen(skb))) { |
| 602 | /* We add a segment for the skb linear buffer only if |
| 603 | * it contains data */ |
| 604 | if (*lso_header_size < skb_headlen(skb)) |
| 605 | real_size += DS_SIZE; |
| 606 | else { |
| 607 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 608 | en_warn(priv, "Non-linear headers\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 609 | return 0; |
| 610 | } |
| 611 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 612 | } else { |
| 613 | *lso_header_size = 0; |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 614 | *inline_ok = is_inline(priv->prof->inline_thold, skb, |
| 615 | shinfo, pfrag); |
| 616 | |
| 617 | if (*inline_ok) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 618 | real_size = inline_size(skb); |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 619 | else |
| 620 | real_size = CTRL_SIZE + |
| 621 | (shinfo->nr_frags + 1) * DS_SIZE; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | return real_size; |
| 625 | } |
| 626 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 627 | static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc, |
| 628 | const struct sk_buff *skb, |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 629 | const struct skb_shared_info *shinfo, |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 630 | int real_size, u16 *vlan_tag, |
| 631 | int tx_ind, void *fragptr) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 632 | { |
| 633 | struct mlx4_wqe_inline_seg *inl = &tx_desc->inl; |
| 634 | int spc = MLX4_INLINE_ALIGN - CTRL_SIZE - sizeof *inl; |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 635 | unsigned int hlen = skb_headlen(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 636 | |
| 637 | if (skb->len <= spc) { |
Eugenia Emantayev | 93591aa | 2014-03-02 10:24:59 +0200 | [diff] [blame] | 638 | if (likely(skb->len >= MIN_PKT_LEN)) { |
| 639 | inl->byte_count = cpu_to_be32(1 << 31 | skb->len); |
| 640 | } else { |
| 641 | inl->byte_count = cpu_to_be32(1 << 31 | MIN_PKT_LEN); |
| 642 | memset(((void *)(inl + 1)) + skb->len, 0, |
| 643 | MIN_PKT_LEN - skb->len); |
| 644 | } |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 645 | skb_copy_from_linear_data(skb, inl + 1, hlen); |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 646 | if (shinfo->nr_frags) |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 647 | memcpy(((void *)(inl + 1)) + hlen, fragptr, |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 648 | skb_frag_size(&shinfo->frags[0])); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 649 | |
| 650 | } else { |
| 651 | inl->byte_count = cpu_to_be32(1 << 31 | spc); |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 652 | if (hlen <= spc) { |
| 653 | skb_copy_from_linear_data(skb, inl + 1, hlen); |
| 654 | if (hlen < spc) { |
| 655 | memcpy(((void *)(inl + 1)) + hlen, |
| 656 | fragptr, spc - hlen); |
| 657 | fragptr += spc - hlen; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 658 | } |
| 659 | inl = (void *) (inl + 1) + spc; |
| 660 | memcpy(((void *)(inl + 1)), fragptr, skb->len - spc); |
| 661 | } else { |
| 662 | skb_copy_from_linear_data(skb, inl + 1, spc); |
| 663 | inl = (void *) (inl + 1) + spc; |
| 664 | skb_copy_from_linear_data_offset(skb, spc, inl + 1, |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 665 | hlen - spc); |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 666 | if (shinfo->nr_frags) |
Eric Dumazet | e533ac7 | 2014-10-05 12:35:18 +0300 | [diff] [blame] | 667 | memcpy(((void *)(inl + 1)) + hlen - spc, |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 668 | fragptr, |
| 669 | skb_frag_size(&shinfo->frags[0])); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 672 | dma_wmb(); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 673 | inl->byte_count = cpu_to_be32(1 << 31 | (skb->len - spc)); |
| 674 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 675 | } |
| 676 | |
Jason Wang | f663dd9 | 2014-01-10 16:18:26 +0800 | [diff] [blame] | 677 | u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb, |
Daniel Borkmann | 99932d4 | 2014-02-16 15:55:20 +0100 | [diff] [blame] | 678 | void *accel_priv, select_queue_fallback_t fallback) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 679 | { |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 680 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Amir Vadai | d317966 | 2012-12-02 03:49:23 +0000 | [diff] [blame] | 681 | u16 rings_p_up = priv->num_tx_rings_p_up; |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 682 | u8 up = 0; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 683 | |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 684 | if (dev->num_tc) |
| 685 | return skb_tx_hash(dev, skb); |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 686 | |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 687 | if (skb_vlan_tag_present(skb)) |
| 688 | up = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT; |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 689 | |
Daniel Borkmann | 99932d4 | 2014-02-16 15:55:20 +0100 | [diff] [blame] | 690 | return fallback(dev, skb) % rings_p_up + up * rings_p_up; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 691 | } |
| 692 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 693 | static void mlx4_bf_copy(void __iomem *dst, const void *src, |
| 694 | unsigned int bytecnt) |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 695 | { |
| 696 | __iowrite64_copy(dst, src, bytecnt / 8); |
| 697 | } |
| 698 | |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 699 | netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 700 | { |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 701 | struct skb_shared_info *shinfo = skb_shinfo(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 702 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 703 | struct device *ddev = priv->ddev; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 704 | struct mlx4_en_tx_ring *ring; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 705 | struct mlx4_en_tx_desc *tx_desc; |
| 706 | struct mlx4_wqe_data_seg *data; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 707 | struct mlx4_en_tx_info *tx_info; |
| 708 | int tx_ind = 0; |
| 709 | int nr_txbb; |
| 710 | int desc_size; |
| 711 | int real_size; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 712 | u32 index, bf_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 713 | __be32 op_own; |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 714 | u16 vlan_tag = 0; |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 715 | int i_frag; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 716 | int lso_header_size; |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 717 | void *fragptr = NULL; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 718 | bool bounce = false; |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 719 | bool send_doorbell; |
Eric Dumazet | fe971b9 | 2014-10-06 09:30:35 -0700 | [diff] [blame] | 720 | bool stop_queue; |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 721 | bool inline_ok; |
Eric Dumazet | f905c79 | 2014-10-05 12:35:16 +0300 | [diff] [blame] | 722 | u32 ring_cons; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 723 | |
Yevgeny Petrilin | 3005ad4 | 2010-08-24 03:46:07 +0000 | [diff] [blame] | 724 | if (!priv->port_up) |
| 725 | goto tx_drop; |
| 726 | |
Eric Dumazet | f905c79 | 2014-10-05 12:35:16 +0300 | [diff] [blame] | 727 | tx_ind = skb_get_queue_mapping(skb); |
| 728 | ring = priv->tx_ring[tx_ind]; |
| 729 | |
| 730 | /* fetch ring->cons far ahead before needing it to avoid stall */ |
| 731 | ring_cons = ACCESS_ONCE(ring->cons); |
| 732 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 733 | real_size = get_real_size(skb, shinfo, dev, &lso_header_size, |
| 734 | &inline_ok, &fragptr); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 735 | if (unlikely(!real_size)) |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 736 | goto tx_drop; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 737 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 738 | /* Align descriptor to TXBB size */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 739 | desc_size = ALIGN(real_size, TXBB_SIZE); |
| 740 | nr_txbb = desc_size / TXBB_SIZE; |
| 741 | if (unlikely(nr_txbb > MAX_DESC_TXBBS)) { |
| 742 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 743 | en_warn(priv, "Oversized header or SG list\n"); |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 744 | goto tx_drop; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 745 | } |
| 746 | |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 747 | if (skb_vlan_tag_present(skb)) |
| 748 | vlan_tag = skb_vlan_tag_get(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 749 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 750 | |
Eric Dumazet | 5351145 | 2014-10-08 08:19:27 -0700 | [diff] [blame] | 751 | netdev_txq_bql_enqueue_prefetchw(ring->tx_queue); |
Eric Dumazet | 29d40c9 | 2014-10-05 12:35:14 +0300 | [diff] [blame] | 752 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 753 | /* Track current inflight packets for performance analysis */ |
| 754 | AVG_PERF_COUNTER(priv->pstats.inflight_avg, |
Eric Dumazet | f905c79 | 2014-10-05 12:35:16 +0300 | [diff] [blame] | 755 | (u32)(ring->prod - ring_cons - 1)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 756 | |
| 757 | /* Packet is good - grab an index and transmit it */ |
| 758 | index = ring->prod & ring->size_mask; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 759 | bf_index = ring->prod; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 760 | |
| 761 | /* See if we have enough space for whole descriptor TXBB for setting |
| 762 | * SW ownership on next descriptor; if not, use a bounce buffer. */ |
| 763 | if (likely(index + nr_txbb <= ring->size)) |
| 764 | tx_desc = ring->buf + index * TXBB_SIZE; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 765 | else { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 766 | tx_desc = (struct mlx4_en_tx_desc *) ring->bounce_buf; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 767 | bounce = true; |
| 768 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 769 | |
| 770 | /* Save skb in tx_info ring */ |
| 771 | tx_info = &ring->tx_info[index]; |
| 772 | tx_info->skb = skb; |
| 773 | tx_info->nr_txbb = nr_txbb; |
| 774 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 775 | data = &tx_desc->data; |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 776 | if (lso_header_size) |
| 777 | data = ((void *)&tx_desc->lso + ALIGN(lso_header_size + 4, |
| 778 | DS_SIZE)); |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 779 | |
| 780 | /* valid only for none inline segments */ |
| 781 | tx_info->data_offset = (void *)data - (void *)tx_desc; |
| 782 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 783 | tx_info->inl = inline_ok; |
| 784 | |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 785 | tx_info->linear = (lso_header_size < skb_headlen(skb) && |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 786 | !inline_ok) ? 1 : 0; |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 787 | |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 788 | tx_info->nr_maps = shinfo->nr_frags + tx_info->linear; |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 789 | data += tx_info->nr_maps - 1; |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 790 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 791 | if (!tx_info->inl) { |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 792 | dma_addr_t dma = 0; |
| 793 | u32 byte_count = 0; |
| 794 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 795 | /* Map fragments if any */ |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 796 | for (i_frag = shinfo->nr_frags - 1; i_frag >= 0; i_frag--) { |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 797 | const struct skb_frag_struct *frag; |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 798 | |
| 799 | frag = &shinfo->frags[i_frag]; |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 800 | byte_count = skb_frag_size(frag); |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 801 | dma = skb_frag_dma_map(ddev, frag, |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 802 | 0, byte_count, |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 803 | DMA_TO_DEVICE); |
| 804 | if (dma_mapping_error(ddev, dma)) |
| 805 | goto tx_drop_unmap; |
| 806 | |
| 807 | data->addr = cpu_to_be64(dma); |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 808 | data->lkey = ring->mr_key; |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 809 | dma_wmb(); |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 810 | data->byte_count = cpu_to_be32(byte_count); |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 811 | --data; |
| 812 | } |
| 813 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 814 | /* Map linear part if needed */ |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 815 | if (tx_info->linear) { |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 816 | byte_count = skb_headlen(skb) - lso_header_size; |
Amir Vadai | 5f1cd20 | 2013-08-21 10:08:59 +0300 | [diff] [blame] | 817 | |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 818 | dma = dma_map_single(ddev, skb->data + |
| 819 | lso_header_size, byte_count, |
| 820 | PCI_DMA_TODEVICE); |
| 821 | if (dma_mapping_error(ddev, dma)) |
| 822 | goto tx_drop_unmap; |
| 823 | |
| 824 | data->addr = cpu_to_be64(dma); |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 825 | data->lkey = ring->mr_key; |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 826 | dma_wmb(); |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 827 | data->byte_count = cpu_to_be32(byte_count); |
| 828 | } |
Eric Dumazet | 3d03641 | 2014-10-05 12:35:13 +0300 | [diff] [blame] | 829 | /* tx completion can avoid cache line miss for common cases */ |
| 830 | tx_info->map0_dma = dma; |
| 831 | tx_info->map0_byte_count = byte_count; |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 832 | } |
| 833 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 834 | /* |
| 835 | * For timestamping add flag to skb_shinfo and |
| 836 | * set flag for further reference |
| 837 | */ |
Eric Dumazet | e70602a | 2014-10-05 12:35:19 +0300 | [diff] [blame] | 838 | tx_info->ts_requested = 0; |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 839 | if (unlikely(ring->hwtstamp_tx_type == HWTSTAMP_TX_ON && |
| 840 | shinfo->tx_flags & SKBTX_HW_TSTAMP)) { |
| 841 | shinfo->tx_flags |= SKBTX_IN_PROGRESS; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 842 | tx_info->ts_requested = 1; |
| 843 | } |
| 844 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 845 | /* Prepare ctrl segement apart opcode+ownership, which depends on |
| 846 | * whether LSO is used */ |
Amir Vadai | 60d6fe9 | 2011-11-26 19:55:19 +0000 | [diff] [blame] | 847 | tx_desc->ctrl.srcrb_flags = priv->ctrl_flags; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 848 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
Or Gerlitz | a4f2dac | 2014-10-30 15:59:27 +0200 | [diff] [blame] | 849 | if (!skb->encapsulation) |
| 850 | tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | |
| 851 | MLX4_WQE_CTRL_TCP_UDP_CSUM); |
| 852 | else |
| 853 | tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM); |
Yevgeny Petrilin | ad04378 | 2011-10-18 01:50:56 +0000 | [diff] [blame] | 854 | ring->tx_csum++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 855 | } |
| 856 | |
Yan Burman | 79aeacc | 2013-02-07 02:25:19 +0000 | [diff] [blame] | 857 | if (priv->flags & MLX4_EN_FLAG_ENABLE_HW_LOOPBACK) { |
Amir Vadai | 5f1cd20 | 2013-08-21 10:08:59 +0300 | [diff] [blame] | 858 | struct ethhdr *ethh; |
| 859 | |
Yan Burman | 213815a | 2013-01-17 05:30:42 +0000 | [diff] [blame] | 860 | /* Copy dst mac address to wqe. This allows loopback in eSwitch, |
| 861 | * so that VFs and PF can communicate with each other |
| 862 | */ |
| 863 | ethh = (struct ethhdr *)skb->data; |
| 864 | tx_desc->ctrl.srcrb_flags16[0] = get_unaligned((__be16 *)ethh->h_dest); |
| 865 | tx_desc->ctrl.imm = get_unaligned((__be32 *)(ethh->h_dest + 2)); |
| 866 | } |
| 867 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 868 | /* Handle LSO (TSO) packets */ |
| 869 | if (lso_header_size) { |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 870 | int i; |
| 871 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 872 | /* Mark opcode as LSO */ |
| 873 | op_own = cpu_to_be32(MLX4_OPCODE_LSO | (1 << 6)) | |
| 874 | ((ring->prod & ring->size) ? |
| 875 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); |
| 876 | |
| 877 | /* Fill in the LSO prefix */ |
| 878 | tx_desc->lso.mss_hdr_size = cpu_to_be32( |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 879 | shinfo->gso_size << 16 | lso_header_size); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 880 | |
| 881 | /* Copy headers; |
| 882 | * note that we already verified that it is linear */ |
| 883 | memcpy(tx_desc->lso.header, skb->data, lso_header_size); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 884 | |
Eric Dumazet | 9fab426 | 2014-10-02 08:24:21 -0700 | [diff] [blame] | 885 | ring->tso_packets++; |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 886 | |
| 887 | i = ((skb->len - lso_header_size) / shinfo->gso_size) + |
| 888 | !!((skb->len - lso_header_size) % shinfo->gso_size); |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 889 | tx_info->nr_bytes = skb->len + (i - 1) * lso_header_size; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 890 | ring->packets += i; |
| 891 | } else { |
| 892 | /* Normal (Non LSO) packet */ |
| 893 | op_own = cpu_to_be32(MLX4_OPCODE_SEND) | |
| 894 | ((ring->prod & ring->size) ? |
| 895 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 896 | tx_info->nr_bytes = max_t(unsigned int, skb->len, ETH_ZLEN); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 897 | ring->packets++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 898 | } |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 899 | ring->bytes += tx_info->nr_bytes; |
| 900 | netdev_tx_sent_queue(ring->tx_queue, tx_info->nr_bytes); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 901 | AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, skb->len); |
| 902 | |
Eric Dumazet | acea73d | 2014-10-05 12:35:20 +0300 | [diff] [blame] | 903 | if (tx_info->inl) |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 904 | build_inline_wqe(tx_desc, skb, shinfo, real_size, &vlan_tag, |
| 905 | tx_ind, fragptr); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 906 | |
Or Gerlitz | 837052d | 2013-12-23 16:09:44 +0200 | [diff] [blame] | 907 | if (skb->encapsulation) { |
| 908 | struct iphdr *ipv4 = (struct iphdr *)skb_inner_network_header(skb); |
| 909 | if (ipv4->protocol == IPPROTO_TCP || ipv4->protocol == IPPROTO_UDP) |
| 910 | op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP | MLX4_WQE_CTRL_ILP); |
| 911 | else |
| 912 | op_own |= cpu_to_be32(MLX4_WQE_CTRL_IIP); |
| 913 | } |
| 914 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 915 | ring->prod += nr_txbb; |
| 916 | |
| 917 | /* If we used a bounce buffer then copy descriptor back into place */ |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 918 | if (unlikely(bounce)) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 919 | tx_desc = mlx4_en_bounce_to_desc(priv, ring, index, desc_size); |
| 920 | |
Amir Vadai | eb0cabb | 2013-04-23 06:06:50 +0000 | [diff] [blame] | 921 | skb_tx_timestamp(skb); |
| 922 | |
Eric Dumazet | fe971b9 | 2014-10-06 09:30:35 -0700 | [diff] [blame] | 923 | /* Check available TXBBs And 2K spare for prefetch */ |
| 924 | stop_queue = (int)(ring->prod - ring_cons) > |
| 925 | ring->size - HEADROOM - MAX_DESC_TXBBS; |
| 926 | if (unlikely(stop_queue)) { |
| 927 | netif_tx_stop_queue(ring->tx_queue); |
| 928 | ring->queue_stopped++; |
| 929 | } |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 930 | send_doorbell = !skb->xmit_more || netif_xmit_stopped(ring->tx_queue); |
| 931 | |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 932 | real_size = (real_size / 16) & 0x3f; |
| 933 | |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 934 | if (ring->bf_enabled && desc_size <= MAX_BF && !bounce && |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 935 | !skb_vlan_tag_present(skb) && send_doorbell) { |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 936 | tx_desc->ctrl.bf_qpn = ring->doorbell_qpn | |
| 937 | cpu_to_be32(real_size); |
Amir Vadai | ec57094 | 2014-03-02 10:25:04 +0200 | [diff] [blame] | 938 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 939 | op_own |= htonl((bf_index & 0xffff) << 8); |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 940 | /* Ensure new descriptor hits memory |
| 941 | * before setting ownership of this descriptor to HW |
| 942 | */ |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 943 | dma_wmb(); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 944 | tx_desc->ctrl.owner_opcode = op_own; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 945 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 946 | wmb(); |
| 947 | |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 948 | mlx4_bf_copy(ring->bf.reg + ring->bf.offset, &tx_desc->ctrl, |
| 949 | desc_size); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 950 | |
| 951 | wmb(); |
| 952 | |
| 953 | ring->bf.offset ^= ring->bf.buf_size; |
| 954 | } else { |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 955 | tx_desc->ctrl.vlan_tag = cpu_to_be16(vlan_tag); |
| 956 | tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_VLAN * |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 957 | !!skb_vlan_tag_present(skb); |
Eric Dumazet | 7dfa4b4 | 2014-10-05 12:35:09 +0300 | [diff] [blame] | 958 | tx_desc->ctrl.fence_size = real_size; |
| 959 | |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 960 | /* Ensure new descriptor hits memory |
| 961 | * before setting ownership of this descriptor to HW |
| 962 | */ |
Alexander Duyck | 12b3375 | 2015-04-08 18:49:36 -0700 | [diff] [blame] | 963 | dma_wmb(); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 964 | tx_desc->ctrl.owner_opcode = op_own; |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 965 | if (send_doorbell) { |
| 966 | wmb(); |
Amir Vadai | 492f5ad | 2014-12-22 10:21:57 +0200 | [diff] [blame] | 967 | /* Since there is no iowrite*_native() that writes the |
| 968 | * value as is, without byteswapping - using the one |
| 969 | * the doesn't do byteswapping in the relevant arch |
| 970 | * endianness. |
| 971 | */ |
| 972 | #if defined(__LITTLE_ENDIAN) |
| 973 | iowrite32( |
| 974 | #else |
| 975 | iowrite32be( |
| 976 | #endif |
| 977 | ring->doorbell_qpn, |
Eric Dumazet | 6a4e812 | 2014-10-05 12:35:11 +0300 | [diff] [blame] | 978 | ring->bf.uar->map + MLX4_SEND_DOORBELL); |
Eric Dumazet | 9fab426 | 2014-10-02 08:24:21 -0700 | [diff] [blame] | 979 | } else { |
| 980 | ring->xmit_more++; |
Eric Dumazet | 5804283 | 2014-09-25 07:17:49 -0700 | [diff] [blame] | 981 | } |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 982 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 983 | |
Eric Dumazet | fe971b9 | 2014-10-06 09:30:35 -0700 | [diff] [blame] | 984 | if (unlikely(stop_queue)) { |
| 985 | /* If queue was emptied after the if (stop_queue) , and before |
| 986 | * the netif_tx_stop_queue() - need to wake the queue, |
| 987 | * or else it will remain stopped forever. |
| 988 | * Need a memory barrier to make sure ring->cons was not |
| 989 | * updated before queue was stopped. |
| 990 | */ |
| 991 | smp_rmb(); |
| 992 | |
| 993 | ring_cons = ACCESS_ONCE(ring->cons); |
| 994 | if (unlikely(((int)(ring->prod - ring_cons)) <= |
| 995 | ring->size - HEADROOM - MAX_DESC_TXBBS)) { |
| 996 | netif_tx_wake_queue(ring->tx_queue); |
| 997 | ring->wake_queue++; |
| 998 | } |
| 999 | } |
Patrick McHardy | ec634fe | 2009-07-05 19:23:38 -0700 | [diff] [blame] | 1000 | return NETDEV_TX_OK; |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 1001 | |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 1002 | tx_drop_unmap: |
| 1003 | en_err(priv, "DMA mapping error\n"); |
| 1004 | |
Eric Dumazet | b9d8839 | 2014-10-05 12:35:17 +0300 | [diff] [blame] | 1005 | while (++i_frag < shinfo->nr_frags) { |
| 1006 | ++data; |
Amir Vadai | 237a3a3 | 2013-08-21 10:08:58 +0300 | [diff] [blame] | 1007 | dma_unmap_page(ddev, (dma_addr_t) be64_to_cpu(data->addr), |
| 1008 | be32_to_cpu(data->byte_count), |
| 1009 | PCI_DMA_TODEVICE); |
| 1010 | } |
| 1011 | |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 1012 | tx_drop: |
| 1013 | dev_kfree_skb_any(skb); |
| 1014 | priv->stats.tx_dropped++; |
| 1015 | return NETDEV_TX_OK; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1016 | } |
| 1017 | |