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> |
| 40 | #include <linux/vmalloc.h> |
Yevgeny Petrilin | fa37a95 | 2010-08-24 03:46:46 +0000 | [diff] [blame] | 41 | #include <linux/tcp.h> |
Paul Gortmaker | 6eb07ca | 2011-09-15 19:46:05 -0400 | [diff] [blame] | 42 | #include <linux/moduleparam.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 43 | |
| 44 | #include "mlx4_en.h" |
| 45 | |
| 46 | enum { |
| 47 | MAX_INLINE = 104, /* 128 - 16 - 4 - 4 */ |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 48 | MAX_BF = 256, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | static int inline_thold __read_mostly = MAX_INLINE; |
| 52 | |
| 53 | module_param_named(inline_thold, inline_thold, int, 0444); |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 54 | MODULE_PARM_DESC(inline_thold, "threshold for using inline data"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 55 | |
| 56 | int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 57 | struct mlx4_en_tx_ring *ring, int qpn, u32 size, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 58 | u16 stride) |
| 59 | { |
| 60 | struct mlx4_en_dev *mdev = priv->mdev; |
| 61 | int tmp; |
| 62 | int err; |
| 63 | |
| 64 | ring->size = size; |
| 65 | ring->size_mask = size - 1; |
| 66 | ring->stride = stride; |
| 67 | |
| 68 | inline_thold = min(inline_thold, MAX_INLINE); |
| 69 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 70 | tmp = size * sizeof(struct mlx4_en_tx_info); |
| 71 | ring->tx_info = vmalloc(tmp); |
Joe Perches | e404dec | 2012-01-29 12:56:23 +0000 | [diff] [blame] | 72 | if (!ring->tx_info) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 73 | return -ENOMEM; |
Joe Perches | e404dec | 2012-01-29 12:56:23 +0000 | [diff] [blame] | 74 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 75 | 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] | 76 | ring->tx_info, tmp); |
| 77 | |
| 78 | ring->bounce_buf = kmalloc(MAX_DESC_SIZE, GFP_KERNEL); |
| 79 | if (!ring->bounce_buf) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 80 | err = -ENOMEM; |
| 81 | goto err_tx; |
| 82 | } |
| 83 | ring->buf_size = ALIGN(size * ring->stride, MLX4_EN_PAGE_SIZE); |
| 84 | |
| 85 | err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres, ring->buf_size, |
| 86 | 2 * PAGE_SIZE); |
| 87 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 88 | en_err(priv, "Failed allocating hwq resources\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 89 | goto err_bounce; |
| 90 | } |
| 91 | |
| 92 | err = mlx4_en_map_buffer(&ring->wqres.buf); |
| 93 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 94 | en_err(priv, "Failed to map TX buffer\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 95 | goto err_hwq_res; |
| 96 | } |
| 97 | |
| 98 | ring->buf = ring->wqres.buf.direct.buf; |
| 99 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 100 | en_dbg(DRV, priv, "Allocated TX ring (addr:%p) - buf:%p size:%d " |
| 101 | "buf_size:%d dma:%llx\n", ring, ring->buf, ring->size, |
| 102 | ring->buf_size, (unsigned long long) ring->wqres.buf.direct.map); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 103 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 104 | ring->qpn = qpn; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 105 | err = mlx4_qp_alloc(mdev->dev, ring->qpn, &ring->qp); |
| 106 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 107 | en_err(priv, "Failed allocating qp %d\n", ring->qpn); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 108 | goto err_map; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 109 | } |
Yevgeny Petrilin | 966508f | 2009-04-20 04:30:03 +0000 | [diff] [blame] | 110 | ring->qp.event = mlx4_en_sqp_event; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 111 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 112 | err = mlx4_bf_alloc(mdev->dev, &ring->bf); |
| 113 | if (err) { |
| 114 | en_dbg(DRV, priv, "working without blueflame (%d)", err); |
| 115 | ring->bf.uar = &mdev->priv_uar; |
| 116 | ring->bf.uar->map = mdev->uar_map; |
| 117 | ring->bf_enabled = false; |
| 118 | } else |
| 119 | ring->bf_enabled = true; |
| 120 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 121 | ring->hwtstamp_tx_type = priv->hwtstamp_config.tx_type; |
| 122 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 123 | return 0; |
| 124 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 125 | err_map: |
| 126 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
| 127 | err_hwq_res: |
| 128 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| 129 | err_bounce: |
| 130 | kfree(ring->bounce_buf); |
| 131 | ring->bounce_buf = NULL; |
| 132 | err_tx: |
| 133 | vfree(ring->tx_info); |
| 134 | ring->tx_info = NULL; |
| 135 | return err; |
| 136 | } |
| 137 | |
| 138 | void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv, |
| 139 | struct mlx4_en_tx_ring *ring) |
| 140 | { |
| 141 | struct mlx4_en_dev *mdev = priv->mdev; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 142 | en_dbg(DRV, priv, "Destroying tx ring, qpn: %d\n", ring->qpn); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 143 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 144 | if (ring->bf_enabled) |
| 145 | mlx4_bf_free(mdev->dev, &ring->bf); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 146 | mlx4_qp_remove(mdev->dev, &ring->qp); |
| 147 | mlx4_qp_free(mdev->dev, &ring->qp); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 148 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
| 149 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| 150 | kfree(ring->bounce_buf); |
| 151 | ring->bounce_buf = NULL; |
| 152 | vfree(ring->tx_info); |
| 153 | ring->tx_info = NULL; |
| 154 | } |
| 155 | |
| 156 | int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv, |
| 157 | struct mlx4_en_tx_ring *ring, |
Amir Vadai | 0e98b52 | 2012-04-04 21:33:24 +0000 | [diff] [blame] | 158 | int cq, int user_prio) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 159 | { |
| 160 | struct mlx4_en_dev *mdev = priv->mdev; |
| 161 | int err; |
| 162 | |
| 163 | ring->cqn = cq; |
| 164 | ring->prod = 0; |
| 165 | ring->cons = 0xffffffff; |
| 166 | ring->last_nr_txbb = 1; |
| 167 | ring->poll_cnt = 0; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 168 | memset(ring->tx_info, 0, ring->size * sizeof(struct mlx4_en_tx_info)); |
| 169 | memset(ring->buf, 0, ring->buf_size); |
| 170 | |
| 171 | ring->qp_state = MLX4_QP_STATE_RST; |
David S. Miller | 1805b2f | 2011-10-24 18:18:09 -0400 | [diff] [blame] | 172 | ring->doorbell_qpn = ring->qp.qpn << 8; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 173 | |
| 174 | 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] | 175 | ring->cqn, user_prio, &ring->context); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 176 | if (ring->bf_enabled) |
| 177 | ring->context.usr_page = cpu_to_be32(ring->bf.uar->index); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 178 | |
| 179 | err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, &ring->context, |
| 180 | &ring->qp, &ring->qp_state); |
| 181 | |
| 182 | return err; |
| 183 | } |
| 184 | |
| 185 | void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv, |
| 186 | struct mlx4_en_tx_ring *ring) |
| 187 | { |
| 188 | struct mlx4_en_dev *mdev = priv->mdev; |
| 189 | |
| 190 | mlx4_qp_modify(mdev->dev, NULL, ring->qp_state, |
| 191 | MLX4_QP_STATE_RST, NULL, 0, 0, &ring->qp); |
| 192 | } |
| 193 | |
| 194 | |
| 195 | static u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv, |
| 196 | struct mlx4_en_tx_ring *ring, |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 197 | int index, u8 owner, u64 timestamp) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 198 | { |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 199 | struct mlx4_en_dev *mdev = priv->mdev; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 200 | struct mlx4_en_tx_info *tx_info = &ring->tx_info[index]; |
| 201 | struct mlx4_en_tx_desc *tx_desc = ring->buf + index * TXBB_SIZE; |
| 202 | struct mlx4_wqe_data_seg *data = (void *) tx_desc + tx_info->data_offset; |
| 203 | struct sk_buff *skb = tx_info->skb; |
| 204 | struct skb_frag_struct *frag; |
| 205 | void *end = ring->buf + ring->buf_size; |
| 206 | int frags = skb_shinfo(skb)->nr_frags; |
| 207 | int i; |
| 208 | __be32 *ptr = (__be32 *)tx_desc; |
| 209 | __be32 stamp = cpu_to_be32(STAMP_VAL | (!!owner << STAMP_SHIFT)); |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 210 | struct skb_shared_hwtstamps hwts; |
| 211 | |
| 212 | if (timestamp) { |
| 213 | mlx4_en_fill_hwtstamps(mdev, &hwts, timestamp); |
| 214 | skb_tstamp_tx(skb, &hwts); |
| 215 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 216 | |
| 217 | /* Optimize the common case when there are no wraparounds */ |
| 218 | if (likely((void *) tx_desc + tx_info->nr_txbb * TXBB_SIZE <= end)) { |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 219 | if (!tx_info->inl) { |
| 220 | if (tx_info->linear) { |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 221 | dma_unmap_single(priv->ddev, |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 222 | (dma_addr_t) be64_to_cpu(data->addr), |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 223 | be32_to_cpu(data->byte_count), |
| 224 | PCI_DMA_TODEVICE); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 225 | ++data; |
| 226 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 227 | |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 228 | for (i = 0; i < frags; i++) { |
| 229 | frag = &skb_shinfo(skb)->frags[i]; |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 230 | dma_unmap_page(priv->ddev, |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 231 | (dma_addr_t) be64_to_cpu(data[i].addr), |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 232 | skb_frag_size(frag), PCI_DMA_TODEVICE); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 233 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 234 | } |
| 235 | /* Stamp the freed descriptor */ |
| 236 | for (i = 0; i < tx_info->nr_txbb * TXBB_SIZE; i += STAMP_STRIDE) { |
| 237 | *ptr = stamp; |
| 238 | ptr += STAMP_DWORDS; |
| 239 | } |
| 240 | |
| 241 | } else { |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 242 | if (!tx_info->inl) { |
| 243 | if ((void *) data >= end) { |
Joe Perches | 43d620c | 2011-06-16 19:08:06 +0000 | [diff] [blame] | 244 | data = ring->buf + ((void *)data - end); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 245 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 246 | |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 247 | if (tx_info->linear) { |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 248 | dma_unmap_single(priv->ddev, |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 249 | (dma_addr_t) be64_to_cpu(data->addr), |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 250 | be32_to_cpu(data->byte_count), |
| 251 | PCI_DMA_TODEVICE); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 252 | ++data; |
| 253 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 254 | |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 255 | for (i = 0; i < frags; i++) { |
| 256 | /* Check for wraparound before unmapping */ |
| 257 | if ((void *) data >= end) |
Joe Perches | 43d620c | 2011-06-16 19:08:06 +0000 | [diff] [blame] | 258 | data = ring->buf; |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 259 | frag = &skb_shinfo(skb)->frags[i]; |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 260 | dma_unmap_page(priv->ddev, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 261 | (dma_addr_t) be64_to_cpu(data->addr), |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 262 | skb_frag_size(frag), PCI_DMA_TODEVICE); |
Yevgeny Petrilin | eb4ad82 | 2009-08-02 20:22:18 -0700 | [diff] [blame] | 263 | ++data; |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 264 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 265 | } |
| 266 | /* Stamp the freed descriptor */ |
| 267 | for (i = 0; i < tx_info->nr_txbb * TXBB_SIZE; i += STAMP_STRIDE) { |
| 268 | *ptr = stamp; |
| 269 | ptr += STAMP_DWORDS; |
| 270 | if ((void *) ptr >= end) { |
| 271 | ptr = ring->buf; |
| 272 | stamp ^= cpu_to_be32(0x80000000); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | } |
| 277 | dev_kfree_skb_any(skb); |
| 278 | return tx_info->nr_txbb; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring) |
| 283 | { |
| 284 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 285 | int cnt = 0; |
| 286 | |
| 287 | /* Skip last polled descriptor */ |
| 288 | ring->cons += ring->last_nr_txbb; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 289 | 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] | 290 | ring->cons, ring->prod); |
| 291 | |
| 292 | if ((u32) (ring->prod - ring->cons) > ring->size) { |
| 293 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 294 | en_warn(priv, "Tx consumer passed producer!\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | while (ring->cons != ring->prod) { |
| 299 | ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring, |
| 300 | ring->cons & ring->size_mask, |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 301 | !!(ring->cons & ring->size), 0); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 302 | ring->cons += ring->last_nr_txbb; |
| 303 | cnt++; |
| 304 | } |
| 305 | |
Tom Herbert | 41b7492 | 2013-02-06 07:58:41 +0000 | [diff] [blame] | 306 | netdev_tx_reset_queue(ring->tx_queue); |
| 307 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 308 | if (cnt) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 309 | en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 310 | |
| 311 | return cnt; |
| 312 | } |
| 313 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 314 | static void mlx4_en_process_tx_cq(struct net_device *dev, struct mlx4_en_cq *cq) |
| 315 | { |
| 316 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 317 | struct mlx4_cq *mcq = &cq->mcq; |
| 318 | struct mlx4_en_tx_ring *ring = &priv->tx_ring[cq->ring]; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 319 | struct mlx4_cqe *cqe; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 320 | u16 index; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 321 | u16 new_index, ring_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 322 | u32 txbbs_skipped = 0; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 323 | u32 cons_index = mcq->cons_index; |
| 324 | int size = cq->size; |
| 325 | u32 size_mask = ring->size_mask; |
| 326 | struct mlx4_cqe *buf = cq->buf; |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 327 | u32 packets = 0; |
| 328 | u32 bytes = 0; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 329 | int factor = priv->cqe_factor; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 330 | u64 timestamp = 0; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 331 | |
| 332 | if (!priv->port_up) |
| 333 | return; |
| 334 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 335 | index = cons_index & size_mask; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 336 | cqe = &buf[(index << factor) + factor]; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 337 | ring_index = ring->cons & size_mask; |
| 338 | |
| 339 | /* Process all completed CQEs */ |
| 340 | while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK, |
| 341 | cons_index & size)) { |
| 342 | /* |
| 343 | * make sure we read the CQE after we read the |
| 344 | * ownership bit |
| 345 | */ |
| 346 | rmb(); |
| 347 | |
| 348 | /* Skip over last polled CQE */ |
| 349 | new_index = be16_to_cpu(cqe->wqe_index) & size_mask; |
| 350 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 351 | do { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 352 | txbbs_skipped += ring->last_nr_txbb; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 353 | ring_index = (ring_index + ring->last_nr_txbb) & size_mask; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 354 | if (ring->tx_info[ring_index].ts_requested) |
| 355 | timestamp = mlx4_en_get_cqe_ts(cqe); |
| 356 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 357 | /* free next descriptor */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 358 | ring->last_nr_txbb = mlx4_en_free_tx_desc( |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 359 | priv, ring, ring_index, |
| 360 | !!((ring->cons + txbbs_skipped) & |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 361 | ring->size), timestamp); |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 362 | packets++; |
| 363 | bytes += ring->tx_info[ring_index].nr_bytes; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 364 | } while (ring_index != new_index); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 365 | |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 366 | ++cons_index; |
| 367 | index = cons_index & size_mask; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 368 | cqe = &buf[(index << factor) + factor]; |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 369 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 370 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 371 | |
| 372 | /* |
| 373 | * To prevent CQ overflow we first update CQ consumer and only then |
| 374 | * the ring consumer. |
| 375 | */ |
Yevgeny Petrilin | f0ab34f | 2011-11-26 19:55:10 +0000 | [diff] [blame] | 376 | mcq->cons_index = cons_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 377 | mlx4_cq_set_ci(mcq); |
| 378 | wmb(); |
| 379 | ring->cons += txbbs_skipped; |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 380 | netdev_tx_completed_queue(ring->tx_queue, packets, bytes); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 381 | |
Yevgeny Petrilin | c18520b | 2012-08-03 00:38:37 +0000 | [diff] [blame] | 382 | /* |
| 383 | * Wakeup Tx queue if this stopped, and at least 1 packet |
| 384 | * was completed |
| 385 | */ |
| 386 | if (netif_tx_queue_stopped(ring->tx_queue) && txbbs_skipped > 0) { |
| 387 | netif_tx_wake_queue(ring->tx_queue); |
| 388 | priv->port_stats.wake_queue++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 389 | } |
| 390 | } |
| 391 | |
| 392 | void mlx4_en_tx_irq(struct mlx4_cq *mcq) |
| 393 | { |
| 394 | struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq); |
| 395 | struct mlx4_en_priv *priv = netdev_priv(cq->dev); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 396 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 397 | mlx4_en_process_tx_cq(cq->dev, cq); |
Yevgeny Petrilin | e22979d | 2012-04-23 02:18:39 +0000 | [diff] [blame] | 398 | mlx4_en_arm_cq(priv, cq); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 402 | static struct mlx4_en_tx_desc *mlx4_en_bounce_to_desc(struct mlx4_en_priv *priv, |
| 403 | struct mlx4_en_tx_ring *ring, |
| 404 | u32 index, |
| 405 | unsigned int desc_size) |
| 406 | { |
| 407 | u32 copy = (ring->size - index) * TXBB_SIZE; |
| 408 | int i; |
| 409 | |
| 410 | for (i = desc_size - copy - 4; i >= 0; i -= 4) { |
| 411 | if ((i & (TXBB_SIZE - 1)) == 0) |
| 412 | wmb(); |
| 413 | |
| 414 | *((u32 *) (ring->buf + i)) = |
| 415 | *((u32 *) (ring->bounce_buf + copy + i)); |
| 416 | } |
| 417 | |
| 418 | for (i = copy - 4; i >= 4 ; i -= 4) { |
| 419 | if ((i & (TXBB_SIZE - 1)) == 0) |
| 420 | wmb(); |
| 421 | |
| 422 | *((u32 *) (ring->buf + index * TXBB_SIZE + i)) = |
| 423 | *((u32 *) (ring->bounce_buf + i)); |
| 424 | } |
| 425 | |
| 426 | /* Return real descriptor location */ |
| 427 | return ring->buf + index * TXBB_SIZE; |
| 428 | } |
| 429 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 430 | static int is_inline(struct sk_buff *skb, void **pfrag) |
| 431 | { |
| 432 | void *ptr; |
| 433 | |
| 434 | if (inline_thold && !skb_is_gso(skb) && skb->len <= inline_thold) { |
| 435 | if (skb_shinfo(skb)->nr_frags == 1) { |
Ian Campbell | 311761c | 2011-10-19 23:01:45 +0000 | [diff] [blame] | 436 | ptr = skb_frag_address_safe(&skb_shinfo(skb)->frags[0]); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 437 | if (unlikely(!ptr)) |
| 438 | return 0; |
| 439 | |
| 440 | if (pfrag) |
| 441 | *pfrag = ptr; |
| 442 | |
| 443 | return 1; |
| 444 | } else if (unlikely(skb_shinfo(skb)->nr_frags)) |
| 445 | return 0; |
| 446 | else |
| 447 | return 1; |
| 448 | } |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | static int inline_size(struct sk_buff *skb) |
| 454 | { |
| 455 | if (skb->len + CTRL_SIZE + sizeof(struct mlx4_wqe_inline_seg) |
| 456 | <= MLX4_INLINE_ALIGN) |
| 457 | return ALIGN(skb->len + CTRL_SIZE + |
| 458 | sizeof(struct mlx4_wqe_inline_seg), 16); |
| 459 | else |
| 460 | return ALIGN(skb->len + CTRL_SIZE + 2 * |
| 461 | sizeof(struct mlx4_wqe_inline_seg), 16); |
| 462 | } |
| 463 | |
| 464 | static int get_real_size(struct sk_buff *skb, struct net_device *dev, |
| 465 | int *lso_header_size) |
| 466 | { |
| 467 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 468 | int real_size; |
| 469 | |
| 470 | if (skb_is_gso(skb)) { |
| 471 | *lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| 472 | real_size = CTRL_SIZE + skb_shinfo(skb)->nr_frags * DS_SIZE + |
| 473 | ALIGN(*lso_header_size + 4, DS_SIZE); |
| 474 | if (unlikely(*lso_header_size != skb_headlen(skb))) { |
| 475 | /* We add a segment for the skb linear buffer only if |
| 476 | * it contains data */ |
| 477 | if (*lso_header_size < skb_headlen(skb)) |
| 478 | real_size += DS_SIZE; |
| 479 | else { |
| 480 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 481 | en_warn(priv, "Non-linear headers\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 482 | return 0; |
| 483 | } |
| 484 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 485 | } else { |
| 486 | *lso_header_size = 0; |
| 487 | if (!is_inline(skb, NULL)) |
| 488 | real_size = CTRL_SIZE + (skb_shinfo(skb)->nr_frags + 1) * DS_SIZE; |
| 489 | else |
| 490 | real_size = inline_size(skb); |
| 491 | } |
| 492 | |
| 493 | return real_size; |
| 494 | } |
| 495 | |
| 496 | static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc, struct sk_buff *skb, |
| 497 | int real_size, u16 *vlan_tag, int tx_ind, void *fragptr) |
| 498 | { |
| 499 | struct mlx4_wqe_inline_seg *inl = &tx_desc->inl; |
| 500 | int spc = MLX4_INLINE_ALIGN - CTRL_SIZE - sizeof *inl; |
| 501 | |
| 502 | if (skb->len <= spc) { |
| 503 | inl->byte_count = cpu_to_be32(1 << 31 | skb->len); |
| 504 | skb_copy_from_linear_data(skb, inl + 1, skb_headlen(skb)); |
| 505 | if (skb_shinfo(skb)->nr_frags) |
| 506 | memcpy(((void *)(inl + 1)) + skb_headlen(skb), fragptr, |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 507 | skb_frag_size(&skb_shinfo(skb)->frags[0])); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 508 | |
| 509 | } else { |
| 510 | inl->byte_count = cpu_to_be32(1 << 31 | spc); |
| 511 | if (skb_headlen(skb) <= spc) { |
| 512 | skb_copy_from_linear_data(skb, inl + 1, skb_headlen(skb)); |
| 513 | if (skb_headlen(skb) < spc) { |
| 514 | memcpy(((void *)(inl + 1)) + skb_headlen(skb), |
| 515 | fragptr, spc - skb_headlen(skb)); |
| 516 | fragptr += spc - skb_headlen(skb); |
| 517 | } |
| 518 | inl = (void *) (inl + 1) + spc; |
| 519 | memcpy(((void *)(inl + 1)), fragptr, skb->len - spc); |
| 520 | } else { |
| 521 | skb_copy_from_linear_data(skb, inl + 1, spc); |
| 522 | inl = (void *) (inl + 1) + spc; |
| 523 | skb_copy_from_linear_data_offset(skb, spc, inl + 1, |
| 524 | skb_headlen(skb) - spc); |
| 525 | if (skb_shinfo(skb)->nr_frags) |
| 526 | memcpy(((void *)(inl + 1)) + skb_headlen(skb) - spc, |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 527 | fragptr, skb_frag_size(&skb_shinfo(skb)->frags[0])); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | wmb(); |
| 531 | inl->byte_count = cpu_to_be32(1 << 31 | (skb->len - spc)); |
| 532 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 533 | } |
| 534 | |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 535 | u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 536 | { |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 537 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Amir Vadai | d317966 | 2012-12-02 03:49:23 +0000 | [diff] [blame] | 538 | u16 rings_p_up = priv->num_tx_rings_p_up; |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 539 | u8 up = 0; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 540 | |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 541 | if (dev->num_tc) |
| 542 | return skb_tx_hash(dev, skb); |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 543 | |
Amir Vadai | bc6a474 | 2012-05-17 00:58:10 +0000 | [diff] [blame] | 544 | if (vlan_tx_tag_present(skb)) |
| 545 | up = vlan_tx_tag_get(skb) >> VLAN_PRIO_SHIFT; |
| 546 | |
| 547 | return __skb_tx_hash(dev, skb, rings_p_up) + up * rings_p_up; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Or Gerlitz | 966684d | 2012-03-06 04:04:02 +0000 | [diff] [blame] | 550 | static void mlx4_bf_copy(void __iomem *dst, unsigned long *src, unsigned bytecnt) |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 551 | { |
| 552 | __iowrite64_copy(dst, src, bytecnt / 8); |
| 553 | } |
| 554 | |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 555 | 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] | 556 | { |
| 557 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 558 | struct mlx4_en_dev *mdev = priv->mdev; |
| 559 | struct mlx4_en_tx_ring *ring; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 560 | struct mlx4_en_tx_desc *tx_desc; |
| 561 | struct mlx4_wqe_data_seg *data; |
| 562 | struct skb_frag_struct *frag; |
| 563 | struct mlx4_en_tx_info *tx_info; |
Yevgeny Petrilin | e7c1c2c4 | 2010-08-24 03:46:18 +0000 | [diff] [blame] | 564 | struct ethhdr *ethh; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 565 | int tx_ind = 0; |
| 566 | int nr_txbb; |
| 567 | int desc_size; |
| 568 | int real_size; |
| 569 | dma_addr_t dma; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 570 | u32 index, bf_index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 571 | __be32 op_own; |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 572 | u16 vlan_tag = 0; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 573 | int i; |
| 574 | int lso_header_size; |
| 575 | void *fragptr; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 576 | bool bounce = false; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 577 | |
Yevgeny Petrilin | 3005ad4 | 2010-08-24 03:46:07 +0000 | [diff] [blame] | 578 | if (!priv->port_up) |
| 579 | goto tx_drop; |
| 580 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 581 | real_size = get_real_size(skb, dev, &lso_header_size); |
| 582 | if (unlikely(!real_size)) |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 583 | goto tx_drop; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 584 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 585 | /* Align descriptor to TXBB size */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 586 | desc_size = ALIGN(real_size, TXBB_SIZE); |
| 587 | nr_txbb = desc_size / TXBB_SIZE; |
| 588 | if (unlikely(nr_txbb > MAX_DESC_TXBBS)) { |
| 589 | if (netif_msg_tx_err(priv)) |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 590 | en_warn(priv, "Oversized header or SG list\n"); |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 591 | goto tx_drop; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 594 | tx_ind = skb->queue_mapping; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 595 | ring = &priv->tx_ring[tx_ind]; |
Jesse Gross | eab6d18 | 2010-10-20 13:56:03 +0000 | [diff] [blame] | 596 | if (vlan_tx_tag_present(skb)) |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 597 | vlan_tag = vlan_tx_tag_get(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 598 | |
| 599 | /* Check available TXBBs And 2K spare for prefetch */ |
| 600 | if (unlikely(((int)(ring->prod - ring->cons)) > |
| 601 | ring->size - HEADROOM - MAX_DESC_TXBBS)) { |
Yevgeny Petrilin | f813cad | 2009-06-01 23:24:07 +0000 | [diff] [blame] | 602 | /* every full Tx ring stops queue */ |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 603 | netif_tx_stop_queue(ring->tx_queue); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 604 | priv->port_stats.queue_stopped++; |
| 605 | |
Amir Vadai | 7225922 | 2013-01-24 01:54:18 +0000 | [diff] [blame] | 606 | /* If queue was emptied after the if, and before the |
| 607 | * stop_queue - need to wake the queue, or else it will remain |
| 608 | * stopped forever. |
| 609 | * Need a memory barrier to make sure ring->cons was not |
| 610 | * updated before queue was stopped. |
| 611 | */ |
| 612 | wmb(); |
| 613 | |
| 614 | if (unlikely(((int)(ring->prod - ring->cons)) <= |
| 615 | ring->size - HEADROOM - MAX_DESC_TXBBS)) { |
| 616 | netif_tx_wake_queue(ring->tx_queue); |
| 617 | priv->port_stats.wake_queue++; |
| 618 | } else { |
| 619 | return NETDEV_TX_BUSY; |
| 620 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 621 | } |
| 622 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 623 | /* Track current inflight packets for performance analysis */ |
| 624 | AVG_PERF_COUNTER(priv->pstats.inflight_avg, |
| 625 | (u32) (ring->prod - ring->cons - 1)); |
| 626 | |
| 627 | /* Packet is good - grab an index and transmit it */ |
| 628 | index = ring->prod & ring->size_mask; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 629 | bf_index = ring->prod; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 630 | |
| 631 | /* See if we have enough space for whole descriptor TXBB for setting |
| 632 | * SW ownership on next descriptor; if not, use a bounce buffer. */ |
| 633 | if (likely(index + nr_txbb <= ring->size)) |
| 634 | tx_desc = ring->buf + index * TXBB_SIZE; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 635 | else { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 636 | tx_desc = (struct mlx4_en_tx_desc *) ring->bounce_buf; |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 637 | bounce = true; |
| 638 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 639 | |
| 640 | /* Save skb in tx_info ring */ |
| 641 | tx_info = &ring->tx_info[index]; |
| 642 | tx_info->skb = skb; |
| 643 | tx_info->nr_txbb = nr_txbb; |
| 644 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 645 | /* |
| 646 | * For timestamping add flag to skb_shinfo and |
| 647 | * set flag for further reference |
| 648 | */ |
| 649 | if (ring->hwtstamp_tx_type == HWTSTAMP_TX_ON && |
| 650 | skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { |
| 651 | skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
| 652 | tx_info->ts_requested = 1; |
| 653 | } |
| 654 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 655 | /* Prepare ctrl segement apart opcode+ownership, which depends on |
| 656 | * whether LSO is used */ |
| 657 | tx_desc->ctrl.vlan_tag = cpu_to_be16(vlan_tag); |
Amir Vadai | c140d76 | 2011-11-26 19:55:23 +0000 | [diff] [blame] | 658 | tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_VLAN * |
| 659 | !!vlan_tx_tag_present(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 660 | tx_desc->ctrl.fence_size = (real_size / 16) & 0x3f; |
Amir Vadai | 60d6fe9 | 2011-11-26 19:55:19 +0000 | [diff] [blame] | 661 | tx_desc->ctrl.srcrb_flags = priv->ctrl_flags; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 662 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
| 663 | tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | |
| 664 | MLX4_WQE_CTRL_TCP_UDP_CSUM); |
Yevgeny Petrilin | ad04378 | 2011-10-18 01:50:56 +0000 | [diff] [blame] | 665 | ring->tx_csum++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Yan Burman | 79aeacc | 2013-02-07 02:25:19 +0000 | [diff] [blame] | 668 | if (priv->flags & MLX4_EN_FLAG_ENABLE_HW_LOOPBACK) { |
Yan Burman | 213815a | 2013-01-17 05:30:42 +0000 | [diff] [blame] | 669 | /* Copy dst mac address to wqe. This allows loopback in eSwitch, |
| 670 | * so that VFs and PF can communicate with each other |
| 671 | */ |
| 672 | ethh = (struct ethhdr *)skb->data; |
| 673 | tx_desc->ctrl.srcrb_flags16[0] = get_unaligned((__be16 *)ethh->h_dest); |
| 674 | tx_desc->ctrl.imm = get_unaligned((__be32 *)(ethh->h_dest + 2)); |
| 675 | } |
| 676 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 677 | /* Handle LSO (TSO) packets */ |
| 678 | if (lso_header_size) { |
| 679 | /* Mark opcode as LSO */ |
| 680 | op_own = cpu_to_be32(MLX4_OPCODE_LSO | (1 << 6)) | |
| 681 | ((ring->prod & ring->size) ? |
| 682 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); |
| 683 | |
| 684 | /* Fill in the LSO prefix */ |
| 685 | tx_desc->lso.mss_hdr_size = cpu_to_be32( |
| 686 | skb_shinfo(skb)->gso_size << 16 | lso_header_size); |
| 687 | |
| 688 | /* Copy headers; |
| 689 | * note that we already verified that it is linear */ |
| 690 | memcpy(tx_desc->lso.header, skb->data, lso_header_size); |
| 691 | data = ((void *) &tx_desc->lso + |
| 692 | ALIGN(lso_header_size + 4, DS_SIZE)); |
| 693 | |
| 694 | priv->port_stats.tso_packets++; |
| 695 | i = ((skb->len - lso_header_size) / skb_shinfo(skb)->gso_size) + |
| 696 | !!((skb->len - lso_header_size) % skb_shinfo(skb)->gso_size); |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 697 | tx_info->nr_bytes = skb->len + (i - 1) * lso_header_size; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 698 | ring->packets += i; |
| 699 | } else { |
| 700 | /* Normal (Non LSO) packet */ |
| 701 | op_own = cpu_to_be32(MLX4_OPCODE_SEND) | |
| 702 | ((ring->prod & ring->size) ? |
| 703 | cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0); |
| 704 | data = &tx_desc->data; |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 705 | tx_info->nr_bytes = max_t(unsigned int, skb->len, ETH_ZLEN); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 706 | ring->packets++; |
| 707 | |
| 708 | } |
Yevgeny Petrilin | 5b263f5 | 2012-04-23 02:18:50 +0000 | [diff] [blame] | 709 | ring->bytes += tx_info->nr_bytes; |
| 710 | netdev_tx_sent_queue(ring->tx_queue, tx_info->nr_bytes); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 711 | AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, skb->len); |
| 712 | |
| 713 | |
| 714 | /* valid only for none inline segments */ |
| 715 | tx_info->data_offset = (void *) data - (void *) tx_desc; |
| 716 | |
| 717 | tx_info->linear = (lso_header_size < skb_headlen(skb) && !is_inline(skb, NULL)) ? 1 : 0; |
| 718 | data += skb_shinfo(skb)->nr_frags + tx_info->linear - 1; |
| 719 | |
| 720 | if (!is_inline(skb, &fragptr)) { |
| 721 | /* Map fragments */ |
| 722 | for (i = skb_shinfo(skb)->nr_frags - 1; i >= 0; i--) { |
| 723 | frag = &skb_shinfo(skb)->frags[i]; |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 724 | dma = skb_frag_dma_map(priv->ddev, frag, |
Ian Campbell | 311761c | 2011-10-19 23:01:45 +0000 | [diff] [blame] | 725 | 0, skb_frag_size(frag), |
| 726 | DMA_TO_DEVICE); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 727 | data->addr = cpu_to_be64(dma); |
| 728 | data->lkey = cpu_to_be32(mdev->mr.key); |
| 729 | wmb(); |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 730 | data->byte_count = cpu_to_be32(skb_frag_size(frag)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 731 | --data; |
| 732 | } |
| 733 | |
| 734 | /* Map linear part */ |
| 735 | if (tx_info->linear) { |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 736 | dma = dma_map_single(priv->ddev, skb->data + lso_header_size, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 737 | skb_headlen(skb) - lso_header_size, PCI_DMA_TODEVICE); |
| 738 | data->addr = cpu_to_be64(dma); |
| 739 | data->lkey = cpu_to_be32(mdev->mr.key); |
| 740 | wmb(); |
| 741 | data->byte_count = cpu_to_be32(skb_headlen(skb) - lso_header_size); |
| 742 | } |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 743 | tx_info->inl = 0; |
| 744 | } else { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 745 | build_inline_wqe(tx_desc, skb, real_size, &vlan_tag, tx_ind, fragptr); |
Yevgeny Petrilin | 41efea5 | 2009-01-08 10:57:15 -0800 | [diff] [blame] | 746 | tx_info->inl = 1; |
| 747 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 748 | |
| 749 | ring->prod += nr_txbb; |
| 750 | |
| 751 | /* If we used a bounce buffer then copy descriptor back into place */ |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 752 | if (bounce) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 753 | tx_desc = mlx4_en_bounce_to_desc(priv, ring, index, desc_size); |
| 754 | |
Amir Vadai | eb0cabb | 2013-04-23 06:06:50 +0000 | [diff] [blame^] | 755 | skb_tx_timestamp(skb); |
| 756 | |
Moni Shoua | 2b39a06 | 2012-10-25 01:12:48 +0000 | [diff] [blame] | 757 | if (ring->bf_enabled && desc_size <= MAX_BF && !bounce && !vlan_tx_tag_present(skb)) { |
David S. Miller | 1805b2f | 2011-10-24 18:18:09 -0400 | [diff] [blame] | 758 | *(__be32 *) (&tx_desc->ctrl.vlan_tag) |= cpu_to_be32(ring->doorbell_qpn); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 759 | op_own |= htonl((bf_index & 0xffff) << 8); |
| 760 | /* Ensure new descirptor hits memory |
| 761 | * before setting ownership of this descriptor to HW */ |
| 762 | wmb(); |
| 763 | tx_desc->ctrl.owner_opcode = op_own; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 764 | |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 765 | wmb(); |
| 766 | |
| 767 | mlx4_bf_copy(ring->bf.reg + ring->bf.offset, (unsigned long *) &tx_desc->ctrl, |
| 768 | desc_size); |
| 769 | |
| 770 | wmb(); |
| 771 | |
| 772 | ring->bf.offset ^= ring->bf.buf_size; |
| 773 | } else { |
| 774 | /* Ensure new descirptor hits memory |
| 775 | * before setting ownership of this descriptor to HW */ |
| 776 | wmb(); |
| 777 | tx_desc->ctrl.owner_opcode = op_own; |
| 778 | wmb(); |
David S. Miller | 1805b2f | 2011-10-24 18:18:09 -0400 | [diff] [blame] | 779 | iowrite32be(ring->doorbell_qpn, ring->bf.uar->map + MLX4_SEND_DOORBELL); |
Yevgeny Petrilin | 87a5c38 | 2011-03-22 22:38:52 +0000 | [diff] [blame] | 780 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 781 | |
Patrick McHardy | ec634fe | 2009-07-05 19:23:38 -0700 | [diff] [blame] | 782 | return NETDEV_TX_OK; |
Yevgeny Petrilin | 7e23091 | 2009-06-20 22:15:31 +0000 | [diff] [blame] | 783 | |
| 784 | tx_drop: |
| 785 | dev_kfree_skb_any(skb); |
| 786 | priv->stats.tx_dropped++; |
| 787 | return NETDEV_TX_OK; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 788 | } |
| 789 | |