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 | |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 34 | #include <net/busy_poll.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 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> |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 39 | #include <linux/rculist.h> |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 40 | #include <linux/if_ether.h> |
| 41 | #include <linux/if_vlan.h> |
| 42 | #include <linux/vmalloc.h> |
| 43 | |
| 44 | #include "mlx4_en.h" |
| 45 | |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 46 | static int mlx4_alloc_pages(struct mlx4_en_priv *priv, |
| 47 | struct mlx4_en_rx_alloc *page_alloc, |
| 48 | const struct mlx4_en_frag_info *frag_info, |
| 49 | gfp_t _gfp) |
| 50 | { |
| 51 | int order; |
| 52 | struct page *page; |
| 53 | dma_addr_t dma; |
| 54 | |
| 55 | for (order = MLX4_EN_ALLOC_PREFER_ORDER; ;) { |
| 56 | gfp_t gfp = _gfp; |
| 57 | |
| 58 | if (order) |
| 59 | gfp |= __GFP_COMP | __GFP_NOWARN; |
| 60 | page = alloc_pages(gfp, order); |
| 61 | if (likely(page)) |
| 62 | break; |
| 63 | if (--order < 0 || |
| 64 | ((PAGE_SIZE << order) < frag_info->frag_size)) |
| 65 | return -ENOMEM; |
| 66 | } |
| 67 | dma = dma_map_page(priv->ddev, page, 0, PAGE_SIZE << order, |
| 68 | PCI_DMA_FROMDEVICE); |
| 69 | if (dma_mapping_error(priv->ddev, dma)) { |
| 70 | put_page(page); |
| 71 | return -ENOMEM; |
| 72 | } |
| 73 | page_alloc->size = PAGE_SIZE << order; |
| 74 | page_alloc->page = page; |
| 75 | page_alloc->dma = dma; |
| 76 | page_alloc->offset = frag_info->frag_align; |
| 77 | /* Not doing get_page() for each frag is a big win |
| 78 | * on asymetric workloads. |
| 79 | */ |
| 80 | atomic_set(&page->_count, page_alloc->size / frag_info->frag_stride); |
| 81 | return 0; |
| 82 | } |
| 83 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 84 | static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv, |
| 85 | struct mlx4_en_rx_desc *rx_desc, |
| 86 | struct mlx4_en_rx_alloc *frags, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 87 | struct mlx4_en_rx_alloc *ring_alloc, |
| 88 | gfp_t gfp) |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 89 | { |
| 90 | struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS]; |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 91 | const struct mlx4_en_frag_info *frag_info; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 92 | struct page *page; |
| 93 | dma_addr_t dma; |
| 94 | int i; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 95 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 96 | for (i = 0; i < priv->num_frags; i++) { |
| 97 | frag_info = &priv->frag_info[i]; |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 98 | page_alloc[i] = ring_alloc[i]; |
| 99 | page_alloc[i].offset += frag_info->frag_stride; |
| 100 | if (page_alloc[i].offset + frag_info->frag_stride <= ring_alloc[i].size) |
| 101 | continue; |
| 102 | if (mlx4_alloc_pages(priv, &page_alloc[i], frag_info, gfp)) |
| 103 | goto out; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | for (i = 0; i < priv->num_frags; i++) { |
| 107 | frags[i] = ring_alloc[i]; |
| 108 | dma = ring_alloc[i].dma + ring_alloc[i].offset; |
| 109 | ring_alloc[i] = page_alloc[i]; |
| 110 | rx_desc->data[i].addr = cpu_to_be64(dma); |
| 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 115 | out: |
| 116 | while (i--) { |
| 117 | frag_info = &priv->frag_info[i]; |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 118 | if (page_alloc[i].page != ring_alloc[i].page) { |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 119 | dma_unmap_page(priv->ddev, page_alloc[i].dma, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 120 | page_alloc[i].size, PCI_DMA_FROMDEVICE); |
| 121 | page = page_alloc[i].page; |
| 122 | atomic_set(&page->_count, 1); |
| 123 | put_page(page); |
| 124 | } |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 125 | } |
| 126 | return -ENOMEM; |
| 127 | } |
| 128 | |
| 129 | static void mlx4_en_free_frag(struct mlx4_en_priv *priv, |
| 130 | struct mlx4_en_rx_alloc *frags, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 131 | int i) |
| 132 | { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 133 | const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i]; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 134 | |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 135 | if (frags[i].offset + frag_info->frag_stride > frags[i].size) |
| 136 | dma_unmap_page(priv->ddev, frags[i].dma, frags[i].size, |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 137 | PCI_DMA_FROMDEVICE); |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 138 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 139 | if (frags[i].page) |
| 140 | put_page(frags[i].page); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static int mlx4_en_init_allocator(struct mlx4_en_priv *priv, |
| 144 | struct mlx4_en_rx_ring *ring) |
| 145 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 146 | int i; |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 147 | struct mlx4_en_rx_alloc *page_alloc; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 148 | |
| 149 | for (i = 0; i < priv->num_frags; i++) { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 150 | const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i]; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 151 | |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 152 | if (mlx4_alloc_pages(priv, &ring->page_alloc[i], |
| 153 | frag_info, GFP_KERNEL)) |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 154 | goto out; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 155 | } |
| 156 | return 0; |
| 157 | |
| 158 | out: |
| 159 | while (i--) { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 160 | struct page *page; |
| 161 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 162 | page_alloc = &ring->page_alloc[i]; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 163 | dma_unmap_page(priv->ddev, page_alloc->dma, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 164 | page_alloc->size, PCI_DMA_FROMDEVICE); |
| 165 | page = page_alloc->page; |
| 166 | atomic_set(&page->_count, 1); |
| 167 | put_page(page); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 168 | page_alloc->page = NULL; |
| 169 | } |
| 170 | return -ENOMEM; |
| 171 | } |
| 172 | |
| 173 | static void mlx4_en_destroy_allocator(struct mlx4_en_priv *priv, |
| 174 | struct mlx4_en_rx_ring *ring) |
| 175 | { |
| 176 | struct mlx4_en_rx_alloc *page_alloc; |
| 177 | int i; |
| 178 | |
| 179 | for (i = 0; i < priv->num_frags; i++) { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 180 | const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i]; |
| 181 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 182 | page_alloc = &ring->page_alloc[i]; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 183 | en_dbg(DRV, priv, "Freeing allocator:%d count:%d\n", |
| 184 | i, page_count(page_alloc->page)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 185 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 186 | dma_unmap_page(priv->ddev, page_alloc->dma, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 187 | page_alloc->size, PCI_DMA_FROMDEVICE); |
| 188 | while (page_alloc->offset + frag_info->frag_stride < page_alloc->size) { |
| 189 | put_page(page_alloc->page); |
| 190 | page_alloc->offset += frag_info->frag_stride; |
| 191 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 192 | page_alloc->page = NULL; |
| 193 | } |
| 194 | } |
| 195 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 196 | static void mlx4_en_init_rx_desc(struct mlx4_en_priv *priv, |
| 197 | struct mlx4_en_rx_ring *ring, int index) |
| 198 | { |
| 199 | struct mlx4_en_rx_desc *rx_desc = ring->buf + ring->stride * index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 200 | int possible_frags; |
| 201 | int i; |
| 202 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 203 | /* Set size and memtype fields */ |
| 204 | for (i = 0; i < priv->num_frags; i++) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 205 | rx_desc->data[i].byte_count = |
| 206 | cpu_to_be32(priv->frag_info[i].frag_size); |
| 207 | rx_desc->data[i].lkey = cpu_to_be32(priv->mdev->mr.key); |
| 208 | } |
| 209 | |
| 210 | /* If the number of used fragments does not fill up the ring stride, |
| 211 | * remaining (unused) fragments must be padded with null address/size |
| 212 | * and a special memory key */ |
| 213 | possible_frags = (ring->stride - sizeof(struct mlx4_en_rx_desc)) / DS_SIZE; |
| 214 | for (i = priv->num_frags; i < possible_frags; i++) { |
| 215 | rx_desc->data[i].byte_count = 0; |
| 216 | rx_desc->data[i].lkey = cpu_to_be32(MLX4_EN_MEMTYPE_PAD); |
| 217 | rx_desc->data[i].addr = 0; |
| 218 | } |
| 219 | } |
| 220 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 221 | static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 222 | struct mlx4_en_rx_ring *ring, int index, |
| 223 | gfp_t gfp) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 224 | { |
| 225 | struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride); |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 226 | struct mlx4_en_rx_alloc *frags = ring->rx_info + |
| 227 | (index << priv->log_rx_info); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 228 | |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 229 | return mlx4_en_alloc_frags(priv, rx_desc, frags, ring->page_alloc, gfp); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static inline void mlx4_en_update_rx_prod_db(struct mlx4_en_rx_ring *ring) |
| 233 | { |
| 234 | *ring->wqres.db.db = cpu_to_be32(ring->prod & 0xffff); |
| 235 | } |
| 236 | |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 237 | static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv, |
| 238 | struct mlx4_en_rx_ring *ring, |
| 239 | int index) |
| 240 | { |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 241 | struct mlx4_en_rx_alloc *frags; |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 242 | int nr; |
| 243 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 244 | frags = ring->rx_info + (index << priv->log_rx_info); |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 245 | for (nr = 0; nr < priv->num_frags; nr++) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 246 | en_dbg(DRV, priv, "Freeing fragment:%d\n", nr); |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 247 | mlx4_en_free_frag(priv, frags, nr); |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 248 | } |
| 249 | } |
| 250 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 251 | static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv) |
| 252 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 253 | struct mlx4_en_rx_ring *ring; |
| 254 | int ring_ind; |
| 255 | int buf_ind; |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 256 | int new_size; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 257 | |
| 258 | for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) { |
| 259 | for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| 260 | ring = &priv->rx_ring[ring_ind]; |
| 261 | |
| 262 | if (mlx4_en_prepare_rx_desc(priv, ring, |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 263 | ring->actual_size, |
| 264 | GFP_KERNEL)) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 265 | if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 266 | en_err(priv, "Failed to allocate " |
| 267 | "enough rx buffers\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 268 | return -ENOMEM; |
| 269 | } else { |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 270 | new_size = rounddown_pow_of_two(ring->actual_size); |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 271 | en_warn(priv, "Only %d buffers allocated " |
| 272 | "reducing ring size to %d", |
| 273 | ring->actual_size, new_size); |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 274 | goto reduce_rings; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 275 | } |
| 276 | } |
| 277 | ring->actual_size++; |
| 278 | ring->prod++; |
| 279 | } |
| 280 | } |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 281 | return 0; |
| 282 | |
| 283 | reduce_rings: |
| 284 | for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| 285 | ring = &priv->rx_ring[ring_ind]; |
| 286 | while (ring->actual_size > new_size) { |
| 287 | ring->actual_size--; |
| 288 | ring->prod--; |
| 289 | mlx4_en_free_rx_desc(priv, ring, ring->actual_size); |
| 290 | } |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 291 | } |
| 292 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 296 | static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv, |
| 297 | struct mlx4_en_rx_ring *ring) |
| 298 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 299 | int index; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 300 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 301 | en_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n", |
| 302 | ring->cons, ring->prod); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 303 | |
| 304 | /* Unmap and free Rx buffers */ |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 305 | BUG_ON((u32) (ring->prod - ring->cons) > ring->actual_size); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 306 | while (ring->cons != ring->prod) { |
| 307 | index = ring->cons & ring->size_mask; |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 308 | en_dbg(DRV, priv, "Processing descriptor:%d\n", index); |
Yevgeny Petrilin | 38aab07 | 2009-05-24 03:17:11 +0000 | [diff] [blame] | 309 | mlx4_en_free_rx_desc(priv, ring, index); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 310 | ++ring->cons; |
| 311 | } |
| 312 | } |
| 313 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 314 | int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv, |
| 315 | struct mlx4_en_rx_ring *ring, u32 size, u16 stride) |
| 316 | { |
| 317 | struct mlx4_en_dev *mdev = priv->mdev; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 318 | int err = -ENOMEM; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 319 | int tmp; |
| 320 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 321 | ring->prod = 0; |
| 322 | ring->cons = 0; |
| 323 | ring->size = size; |
| 324 | ring->size_mask = size - 1; |
| 325 | ring->stride = stride; |
| 326 | ring->log_stride = ffs(ring->stride) - 1; |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 327 | ring->buf_size = ring->size * ring->stride + TXBB_SIZE; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 328 | |
| 329 | tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS * |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 330 | sizeof(struct mlx4_en_rx_alloc)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 331 | ring->rx_info = vmalloc(tmp); |
Joe Perches | e404dec | 2012-01-29 12:56:23 +0000 | [diff] [blame] | 332 | if (!ring->rx_info) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 333 | return -ENOMEM; |
Joe Perches | e404dec | 2012-01-29 12:56:23 +0000 | [diff] [blame] | 334 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 335 | en_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n", |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 336 | ring->rx_info, tmp); |
| 337 | |
| 338 | err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres, |
| 339 | ring->buf_size, 2 * PAGE_SIZE); |
| 340 | if (err) |
| 341 | goto err_ring; |
| 342 | |
| 343 | err = mlx4_en_map_buffer(&ring->wqres.buf); |
| 344 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 345 | en_err(priv, "Failed to map RX buffer\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 346 | goto err_hwq; |
| 347 | } |
| 348 | ring->buf = ring->wqres.buf.direct.buf; |
| 349 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 350 | ring->hwtstamp_rx_filter = priv->hwtstamp_config.rx_filter; |
| 351 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 352 | return 0; |
| 353 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 354 | err_hwq: |
| 355 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size); |
| 356 | err_ring: |
| 357 | vfree(ring->rx_info); |
| 358 | ring->rx_info = NULL; |
| 359 | return err; |
| 360 | } |
| 361 | |
| 362 | int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv) |
| 363 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 364 | struct mlx4_en_rx_ring *ring; |
| 365 | int i; |
| 366 | int ring_ind; |
| 367 | int err; |
| 368 | int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) + |
| 369 | DS_SIZE * priv->num_frags); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 370 | |
| 371 | for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| 372 | ring = &priv->rx_ring[ring_ind]; |
| 373 | |
| 374 | ring->prod = 0; |
| 375 | ring->cons = 0; |
| 376 | ring->actual_size = 0; |
| 377 | ring->cqn = priv->rx_cq[ring_ind].mcq.cqn; |
| 378 | |
| 379 | ring->stride = stride; |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 380 | if (ring->stride <= TXBB_SIZE) |
| 381 | ring->buf += TXBB_SIZE; |
| 382 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 383 | ring->log_stride = ffs(ring->stride) - 1; |
| 384 | ring->buf_size = ring->size * ring->stride; |
| 385 | |
| 386 | memset(ring->buf, 0, ring->buf_size); |
| 387 | mlx4_en_update_rx_prod_db(ring); |
| 388 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 389 | /* Initialize all descriptors */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 390 | for (i = 0; i < ring->size; i++) |
| 391 | mlx4_en_init_rx_desc(priv, ring, i); |
| 392 | |
| 393 | /* Initialize page allocators */ |
| 394 | err = mlx4_en_init_allocator(priv, ring); |
| 395 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 396 | en_err(priv, "Failed initializing ring allocator\n"); |
Yevgeny Petrilin | 60b1809 | 2011-04-06 23:25:45 +0000 | [diff] [blame] | 397 | if (ring->stride <= TXBB_SIZE) |
| 398 | ring->buf -= TXBB_SIZE; |
Yevgeny Petrilin | 9a4f92a | 2009-04-20 04:24:28 +0000 | [diff] [blame] | 399 | ring_ind--; |
| 400 | goto err_allocator; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 401 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 402 | } |
Ingo Molnar | b58515b | 2008-11-25 16:53:32 -0800 | [diff] [blame] | 403 | err = mlx4_en_fill_rx_buffers(priv); |
| 404 | if (err) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 405 | goto err_buffers; |
| 406 | |
| 407 | for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) { |
| 408 | ring = &priv->rx_ring[ring_ind]; |
| 409 | |
Yevgeny Petrilin | 00d7d7b | 2010-08-24 03:45:20 +0000 | [diff] [blame] | 410 | ring->size_mask = ring->actual_size - 1; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 411 | mlx4_en_update_rx_prod_db(ring); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | return 0; |
| 415 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 416 | err_buffers: |
| 417 | for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) |
| 418 | mlx4_en_free_rx_buf(priv, &priv->rx_ring[ring_ind]); |
| 419 | |
| 420 | ring_ind = priv->rx_ring_num - 1; |
| 421 | err_allocator: |
| 422 | while (ring_ind >= 0) { |
Yevgeny Petrilin | 60b1809 | 2011-04-06 23:25:45 +0000 | [diff] [blame] | 423 | if (priv->rx_ring[ring_ind].stride <= TXBB_SIZE) |
| 424 | priv->rx_ring[ring_ind].buf -= TXBB_SIZE; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 425 | mlx4_en_destroy_allocator(priv, &priv->rx_ring[ring_ind]); |
| 426 | ring_ind--; |
| 427 | } |
| 428 | return err; |
| 429 | } |
| 430 | |
| 431 | void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv, |
Thadeu Lima de Souza Cascardo | 68355f7 | 2012-02-06 08:39:49 +0000 | [diff] [blame] | 432 | struct mlx4_en_rx_ring *ring, u32 size, u16 stride) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 433 | { |
| 434 | struct mlx4_en_dev *mdev = priv->mdev; |
| 435 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 436 | mlx4_en_unmap_buffer(&ring->wqres.buf); |
Thadeu Lima de Souza Cascardo | 68355f7 | 2012-02-06 08:39:49 +0000 | [diff] [blame] | 437 | mlx4_free_hwq_res(mdev->dev, &ring->wqres, size * stride + TXBB_SIZE); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 438 | vfree(ring->rx_info); |
| 439 | ring->rx_info = NULL; |
Amir Vadai | 1eb8c69 | 2012-07-18 22:33:52 +0000 | [diff] [blame] | 440 | #ifdef CONFIG_RFS_ACCEL |
| 441 | mlx4_en_cleanup_filters(priv, ring); |
| 442 | #endif |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv, |
| 446 | struct mlx4_en_rx_ring *ring) |
| 447 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 448 | mlx4_en_free_rx_buf(priv, ring); |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 449 | if (ring->stride <= TXBB_SIZE) |
| 450 | ring->buf -= TXBB_SIZE; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 451 | mlx4_en_destroy_allocator(priv, ring); |
| 452 | } |
| 453 | |
| 454 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 455 | static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv, |
| 456 | struct mlx4_en_rx_desc *rx_desc, |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 457 | struct mlx4_en_rx_alloc *frags, |
Eric Dumazet | 90278c9 | 2011-10-19 18:49:52 +0000 | [diff] [blame] | 458 | struct sk_buff *skb, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 459 | int length) |
| 460 | { |
Eric Dumazet | 90278c9 | 2011-10-19 18:49:52 +0000 | [diff] [blame] | 461 | struct skb_frag_struct *skb_frags_rx = skb_shinfo(skb)->frags; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 462 | struct mlx4_en_frag_info *frag_info; |
| 463 | int nr; |
| 464 | dma_addr_t dma; |
| 465 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 466 | /* Collect used fragments while replacing them in the HW descriptors */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 467 | for (nr = 0; nr < priv->num_frags; nr++) { |
| 468 | frag_info = &priv->frag_info[nr]; |
| 469 | if (length <= frag_info->frag_prefix_size) |
| 470 | break; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 471 | if (!frags[nr].page) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 472 | goto fail; |
| 473 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 474 | dma = be64_to_cpu(rx_desc->data[nr].addr); |
| 475 | dma_sync_single_for_cpu(priv->ddev, dma, frag_info->frag_size, |
| 476 | DMA_FROM_DEVICE); |
| 477 | |
| 478 | /* Save page reference in skb */ |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 479 | __skb_frag_set_page(&skb_frags_rx[nr], frags[nr].page); |
| 480 | skb_frag_size_set(&skb_frags_rx[nr], frag_info->frag_size); |
| 481 | skb_frags_rx[nr].page_offset = frags[nr].offset; |
| 482 | skb->truesize += frag_info->frag_stride; |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 483 | frags[nr].page = NULL; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 484 | } |
| 485 | /* Adjust size of last fragment to match actual length */ |
roel kluin | 973507c | 2009-08-08 23:54:21 +0000 | [diff] [blame] | 486 | if (nr > 0) |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 487 | skb_frag_size_set(&skb_frags_rx[nr - 1], |
| 488 | length - priv->frag_info[nr - 1].frag_prefix_size); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 489 | return nr; |
| 490 | |
| 491 | fail: |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 492 | while (nr > 0) { |
| 493 | nr--; |
Ian Campbell | 311761c | 2011-10-19 23:01:45 +0000 | [diff] [blame] | 494 | __skb_frag_unref(&skb_frags_rx[nr]); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 495 | } |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | |
| 500 | static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv, |
| 501 | struct mlx4_en_rx_desc *rx_desc, |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 502 | struct mlx4_en_rx_alloc *frags, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 503 | unsigned int length) |
| 504 | { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 505 | struct sk_buff *skb; |
| 506 | void *va; |
| 507 | int used_frags; |
| 508 | dma_addr_t dma; |
| 509 | |
Pradeep A Dalvi | c056b73 | 2012-02-05 02:50:38 +0000 | [diff] [blame] | 510 | skb = netdev_alloc_skb(priv->dev, SMALL_PACKET_SIZE + NET_IP_ALIGN); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 511 | if (!skb) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 512 | en_dbg(RX_ERR, priv, "Failed allocating skb\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 513 | return NULL; |
| 514 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 515 | skb_reserve(skb, NET_IP_ALIGN); |
| 516 | skb->len = length; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 517 | |
| 518 | /* Get pointer to first fragment so we could copy the headers into the |
| 519 | * (linear part of the) skb */ |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 520 | va = page_address(frags[0].page) + frags[0].offset; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 521 | |
| 522 | if (length <= SMALL_PACKET_SIZE) { |
| 523 | /* We are copying all relevant data to the skb - temporarily |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 524 | * sync buffers for the copy */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 525 | dma = be64_to_cpu(rx_desc->data[0].addr); |
Yevgeny Petrilin | ebf8c9a | 2012-03-06 04:03:34 +0000 | [diff] [blame] | 526 | dma_sync_single_for_cpu(priv->ddev, dma, length, |
FUJITA Tomonori | e4fc856 | 2010-02-04 18:57:42 +0000 | [diff] [blame] | 527 | DMA_FROM_DEVICE); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 528 | skb_copy_to_linear_data(skb, va, length); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 529 | skb->tail += length; |
| 530 | } else { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 531 | /* Move relevant fragments to skb */ |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 532 | used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, frags, |
| 533 | skb, length); |
Yevgeny Petrilin | 785a0982 | 2009-04-26 20:42:57 +0000 | [diff] [blame] | 534 | if (unlikely(!used_frags)) { |
| 535 | kfree_skb(skb); |
| 536 | return NULL; |
| 537 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 538 | skb_shinfo(skb)->nr_frags = used_frags; |
| 539 | |
| 540 | /* Copy headers into the skb linear buffer */ |
| 541 | memcpy(skb->data, va, HEADER_COPY_SIZE); |
| 542 | skb->tail += HEADER_COPY_SIZE; |
| 543 | |
| 544 | /* Skip headers in first fragment */ |
| 545 | skb_shinfo(skb)->frags[0].page_offset += HEADER_COPY_SIZE; |
| 546 | |
| 547 | /* Adjust size of first fragment */ |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 548 | skb_frag_size_sub(&skb_shinfo(skb)->frags[0], HEADER_COPY_SIZE); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 549 | skb->data_len = length - HEADER_COPY_SIZE; |
| 550 | } |
| 551 | return skb; |
| 552 | } |
| 553 | |
Yevgeny Petrilin | e7c1c2c4 | 2010-08-24 03:46:18 +0000 | [diff] [blame] | 554 | static void validate_loopback(struct mlx4_en_priv *priv, struct sk_buff *skb) |
| 555 | { |
| 556 | int i; |
| 557 | int offset = ETH_HLEN; |
| 558 | |
| 559 | for (i = 0; i < MLX4_LOOPBACK_TEST_PAYLOAD; i++, offset++) { |
| 560 | if (*(skb->data + offset) != (unsigned char) (i & 0xff)) |
| 561 | goto out_loopback; |
| 562 | } |
| 563 | /* Loopback found */ |
| 564 | priv->loopback_ok = 1; |
| 565 | |
| 566 | out_loopback: |
| 567 | dev_kfree_skb_any(skb); |
| 568 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 569 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 570 | static void mlx4_en_refill_rx_buffers(struct mlx4_en_priv *priv, |
| 571 | struct mlx4_en_rx_ring *ring) |
| 572 | { |
| 573 | int index = ring->prod & ring->size_mask; |
| 574 | |
| 575 | while ((u32) (ring->prod - ring->cons) < ring->actual_size) { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 576 | if (mlx4_en_prepare_rx_desc(priv, ring, index, GFP_ATOMIC)) |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 577 | break; |
| 578 | ring->prod++; |
| 579 | index = ring->prod & ring->size_mask; |
| 580 | } |
| 581 | } |
| 582 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 583 | int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget) |
| 584 | { |
| 585 | struct mlx4_en_priv *priv = netdev_priv(dev); |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 586 | struct mlx4_en_dev *mdev = priv->mdev; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 587 | struct mlx4_cqe *cqe; |
| 588 | struct mlx4_en_rx_ring *ring = &priv->rx_ring[cq->ring]; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 589 | struct mlx4_en_rx_alloc *frags; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 590 | struct mlx4_en_rx_desc *rx_desc; |
| 591 | struct sk_buff *skb; |
| 592 | int index; |
| 593 | int nr; |
| 594 | unsigned int length; |
| 595 | int polled = 0; |
| 596 | int ip_summed; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 597 | int factor = priv->cqe_factor; |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 598 | u64 timestamp; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 599 | |
| 600 | if (!priv->port_up) |
| 601 | return 0; |
| 602 | |
| 603 | /* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx |
| 604 | * descriptor offset can be deduced from the CQE index instead of |
| 605 | * reading 'cqe->index' */ |
| 606 | index = cq->mcq.cons_index & ring->size_mask; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 607 | cqe = &cq->buf[(index << factor) + factor]; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 608 | |
| 609 | /* Process all completed CQEs */ |
| 610 | while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK, |
| 611 | cq->mcq.cons_index & cq->size)) { |
| 612 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 613 | frags = ring->rx_info + (index << priv->log_rx_info); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 614 | rx_desc = ring->buf + (index << ring->log_stride); |
| 615 | |
| 616 | /* |
| 617 | * make sure we read the CQE after we read the ownership bit |
| 618 | */ |
| 619 | rmb(); |
| 620 | |
| 621 | /* Drop packet on bad receive or bad checksum */ |
| 622 | if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == |
| 623 | MLX4_CQE_OPCODE_ERROR)) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 624 | en_err(priv, "CQE completed in error - vendor " |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 625 | "syndrom:%d syndrom:%d\n", |
| 626 | ((struct mlx4_err_cqe *) cqe)->vendor_err_syndrome, |
| 627 | ((struct mlx4_err_cqe *) cqe)->syndrome); |
| 628 | goto next; |
| 629 | } |
| 630 | if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 631 | en_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n"); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 632 | goto next; |
| 633 | } |
| 634 | |
Yan Burman | 79aeacc | 2013-02-07 02:25:19 +0000 | [diff] [blame] | 635 | /* Check if we need to drop the packet if SRIOV is not enabled |
| 636 | * and not performing the selftest or flb disabled |
| 637 | */ |
| 638 | if (priv->flags & MLX4_EN_FLAG_RX_FILTER_NEEDED) { |
| 639 | struct ethhdr *ethh; |
| 640 | dma_addr_t dma; |
Yan Burman | 79aeacc | 2013-02-07 02:25:19 +0000 | [diff] [blame] | 641 | /* Get pointer to first fragment since we haven't |
| 642 | * skb yet and cast it to ethhdr struct |
| 643 | */ |
| 644 | dma = be64_to_cpu(rx_desc->data[0].addr); |
| 645 | dma_sync_single_for_cpu(priv->ddev, dma, sizeof(*ethh), |
| 646 | DMA_FROM_DEVICE); |
| 647 | ethh = (struct ethhdr *)(page_address(frags[0].page) + |
| 648 | frags[0].offset); |
Eugenia Emantayev | 5b4c4d3 | 2011-12-13 04:16:38 +0000 | [diff] [blame] | 649 | |
Yan Burman | c07cb4b | 2013-02-07 02:25:25 +0000 | [diff] [blame] | 650 | if (is_multicast_ether_addr(ethh->h_dest)) { |
| 651 | struct mlx4_mac_entry *entry; |
Yan Burman | c07cb4b | 2013-02-07 02:25:25 +0000 | [diff] [blame] | 652 | struct hlist_head *bucket; |
| 653 | unsigned int mac_hash; |
| 654 | |
| 655 | /* Drop the packet, since HW loopback-ed it */ |
| 656 | mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX]; |
| 657 | bucket = &priv->mac_hash[mac_hash]; |
| 658 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 659 | hlist_for_each_entry_rcu(entry, bucket, hlist) { |
Yan Burman | c07cb4b | 2013-02-07 02:25:25 +0000 | [diff] [blame] | 660 | if (ether_addr_equal_64bits(entry->mac, |
| 661 | ethh->h_source)) { |
| 662 | rcu_read_unlock(); |
| 663 | goto next; |
| 664 | } |
| 665 | } |
| 666 | rcu_read_unlock(); |
| 667 | } |
Yan Burman | 79aeacc | 2013-02-07 02:25:19 +0000 | [diff] [blame] | 668 | } |
Eugenia Emantayev | 5b4c4d3 | 2011-12-13 04:16:38 +0000 | [diff] [blame] | 669 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 670 | /* |
| 671 | * Packet is OK - process it. |
| 672 | */ |
| 673 | length = be32_to_cpu(cqe->byte_cnt); |
Yevgeny Petrilin | 4a5f4dd | 2011-11-14 14:25:36 -0500 | [diff] [blame] | 674 | length -= ring->fcs_del; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 675 | ring->bytes += length; |
| 676 | ring->packets++; |
| 677 | |
Michał Mirosław | c8c64cf | 2011-04-15 04:50:49 +0000 | [diff] [blame] | 678 | if (likely(dev->features & NETIF_F_RXCSUM)) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 679 | if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) && |
| 680 | (cqe->checksum == cpu_to_be16(0xffff))) { |
Yevgeny Petrilin | ad04378 | 2011-10-18 01:50:56 +0000 | [diff] [blame] | 681 | ring->csum_ok++; |
Ben Hutchings | f1d29a3 | 2012-11-16 12:44:56 +0000 | [diff] [blame] | 682 | /* This packet is eligible for GRO if it is: |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 683 | * - DIX Ethernet (type interpretation) |
| 684 | * - TCP/IP (v4) |
| 685 | * - without IP options |
Amir Vadai | 9e77a2b | 2013-06-18 16:18:27 +0300 | [diff] [blame] | 686 | * - not an IP fragment |
| 687 | * - no LLS polling in progress |
| 688 | */ |
| 689 | if (!mlx4_en_cq_ll_polling(cq) && |
| 690 | (dev->features & NETIF_F_GRO)) { |
Yevgeny Petrilin | fa37a95 | 2010-08-24 03:46:46 +0000 | [diff] [blame] | 691 | struct sk_buff *gro_skb = napi_get_frags(&cq->napi); |
Yevgeny Petrilin | ebc872c | 2010-09-05 22:20:11 +0000 | [diff] [blame] | 692 | if (!gro_skb) |
| 693 | goto next; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 694 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 695 | nr = mlx4_en_complete_rx_desc(priv, |
| 696 | rx_desc, frags, gro_skb, |
| 697 | length); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 698 | if (!nr) |
| 699 | goto next; |
| 700 | |
Yevgeny Petrilin | fa37a95 | 2010-08-24 03:46:46 +0000 | [diff] [blame] | 701 | skb_shinfo(gro_skb)->nr_frags = nr; |
| 702 | gro_skb->len = length; |
| 703 | gro_skb->data_len = length; |
Yevgeny Petrilin | fa37a95 | 2010-08-24 03:46:46 +0000 | [diff] [blame] | 704 | gro_skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 705 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 706 | if ((cqe->vlan_my_qpn & |
| 707 | cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK)) && |
| 708 | (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) { |
Jiri Pirko | f1b553f | 2011-07-20 04:54:22 +0000 | [diff] [blame] | 709 | u16 vid = be16_to_cpu(cqe->sl_vid); |
| 710 | |
Patrick McHardy | 86a9bad | 2013-04-19 02:04:30 +0000 | [diff] [blame] | 711 | __vlan_hwaccel_put_tag(gro_skb, htons(ETH_P_8021Q), vid); |
Jiri Pirko | f1b553f | 2011-07-20 04:54:22 +0000 | [diff] [blame] | 712 | } |
| 713 | |
Yevgeny Petrilin | ad86107 | 2011-10-18 01:51:24 +0000 | [diff] [blame] | 714 | if (dev->features & NETIF_F_RXHASH) |
| 715 | gro_skb->rxhash = be32_to_cpu(cqe->immed_rss_invalid); |
| 716 | |
Yevgeny Petrilin | 3b61008 | 2011-10-18 01:51:09 +0000 | [diff] [blame] | 717 | skb_record_rx_queue(gro_skb, cq->ring); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 718 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 719 | if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) { |
| 720 | timestamp = mlx4_en_get_cqe_ts(cqe); |
| 721 | mlx4_en_fill_hwtstamps(mdev, |
| 722 | skb_hwtstamps(gro_skb), |
| 723 | timestamp); |
| 724 | } |
| 725 | |
| 726 | napi_gro_frags(&cq->napi); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 727 | goto next; |
| 728 | } |
| 729 | |
Ben Hutchings | f1d29a3 | 2012-11-16 12:44:56 +0000 | [diff] [blame] | 730 | /* GRO not possible, complete processing here */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 731 | ip_summed = CHECKSUM_UNNECESSARY; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 732 | } else { |
| 733 | ip_summed = CHECKSUM_NONE; |
Yevgeny Petrilin | ad04378 | 2011-10-18 01:50:56 +0000 | [diff] [blame] | 734 | ring->csum_none++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 735 | } |
| 736 | } else { |
| 737 | ip_summed = CHECKSUM_NONE; |
Yevgeny Petrilin | ad04378 | 2011-10-18 01:50:56 +0000 | [diff] [blame] | 738 | ring->csum_none++; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 739 | } |
| 740 | |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 741 | skb = mlx4_en_rx_skb(priv, rx_desc, frags, length); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 742 | if (!skb) { |
| 743 | priv->stats.rx_dropped++; |
| 744 | goto next; |
| 745 | } |
| 746 | |
Yevgeny Petrilin | e7c1c2c4 | 2010-08-24 03:46:18 +0000 | [diff] [blame] | 747 | if (unlikely(priv->validate_loopback)) { |
| 748 | validate_loopback(priv, skb); |
| 749 | goto next; |
| 750 | } |
| 751 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 752 | skb->ip_summed = ip_summed; |
| 753 | skb->protocol = eth_type_trans(skb, dev); |
David S. Miller | 0c8dfc8 | 2009-01-27 16:22:32 -0800 | [diff] [blame] | 754 | skb_record_rx_queue(skb, cq->ring); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 755 | |
Yevgeny Petrilin | ad86107 | 2011-10-18 01:51:24 +0000 | [diff] [blame] | 756 | if (dev->features & NETIF_F_RXHASH) |
| 757 | skb->rxhash = be32_to_cpu(cqe->immed_rss_invalid); |
| 758 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 759 | if ((be32_to_cpu(cqe->vlan_my_qpn) & |
| 760 | MLX4_CQE_VLAN_PRESENT_MASK) && |
| 761 | (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) |
Patrick McHardy | 86a9bad | 2013-04-19 02:04:30 +0000 | [diff] [blame] | 762 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(cqe->sl_vid)); |
Jiri Pirko | f1b553f | 2011-07-20 04:54:22 +0000 | [diff] [blame] | 763 | |
Amir Vadai | ec693d4 | 2013-04-23 06:06:49 +0000 | [diff] [blame] | 764 | if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) { |
| 765 | timestamp = mlx4_en_get_cqe_ts(cqe); |
| 766 | mlx4_en_fill_hwtstamps(mdev, skb_hwtstamps(skb), |
| 767 | timestamp); |
| 768 | } |
| 769 | |
Eliezer Tamir | 8b80cda | 2013-07-10 17:13:26 +0300 | [diff] [blame^] | 770 | skb_mark_napi_id(skb, &cq->napi); |
Amir Vadai | 9e77a2b | 2013-06-18 16:18:27 +0300 | [diff] [blame] | 771 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 772 | /* Push it up the stack */ |
Jiri Pirko | f1b553f | 2011-07-20 04:54:22 +0000 | [diff] [blame] | 773 | netif_receive_skb(skb); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 774 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 775 | next: |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 776 | for (nr = 0; nr < priv->num_frags; nr++) |
| 777 | mlx4_en_free_frag(priv, frags, nr); |
| 778 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 779 | ++cq->mcq.cons_index; |
| 780 | index = (cq->mcq.cons_index) & ring->size_mask; |
Or Gerlitz | 08ff323 | 2012-10-21 14:59:24 +0000 | [diff] [blame] | 781 | cqe = &cq->buf[(index << factor) + factor]; |
Ben Hutchings | f1d29a3 | 2012-11-16 12:44:56 +0000 | [diff] [blame] | 782 | if (++polled == budget) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 783 | goto out; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 786 | out: |
| 787 | AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled); |
| 788 | mlx4_cq_set_ci(&cq->mcq); |
| 789 | wmb(); /* ensure HW sees CQ consumer before we post new buffers */ |
| 790 | ring->cons = cq->mcq.cons_index; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 791 | mlx4_en_refill_rx_buffers(priv, ring); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 792 | mlx4_en_update_rx_prod_db(ring); |
| 793 | return polled; |
| 794 | } |
| 795 | |
| 796 | |
| 797 | void mlx4_en_rx_irq(struct mlx4_cq *mcq) |
| 798 | { |
| 799 | struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq); |
| 800 | struct mlx4_en_priv *priv = netdev_priv(cq->dev); |
| 801 | |
| 802 | if (priv->port_up) |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 803 | napi_schedule(&cq->napi); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 804 | else |
| 805 | mlx4_en_arm_cq(priv, cq); |
| 806 | } |
| 807 | |
| 808 | /* Rx CQ polling - called by NAPI */ |
| 809 | int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget) |
| 810 | { |
| 811 | struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi); |
| 812 | struct net_device *dev = cq->dev; |
| 813 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 814 | int done; |
| 815 | |
Amir Vadai | 9e77a2b | 2013-06-18 16:18:27 +0300 | [diff] [blame] | 816 | if (!mlx4_en_cq_lock_napi(cq)) |
| 817 | return budget; |
| 818 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 819 | done = mlx4_en_process_rx_cq(dev, cq, budget); |
| 820 | |
Amir Vadai | 9e77a2b | 2013-06-18 16:18:27 +0300 | [diff] [blame] | 821 | mlx4_en_cq_unlock_napi(cq); |
| 822 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 823 | /* If we used up all the quota - we're probably not done yet... */ |
| 824 | if (done == budget) |
| 825 | INC_PERF_COUNTER(priv->pstats.napi_quota); |
| 826 | else { |
| 827 | /* Done for now */ |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 828 | napi_complete(napi); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 829 | mlx4_en_arm_cq(priv, cq); |
| 830 | } |
| 831 | return done; |
| 832 | } |
| 833 | |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 834 | static const int frag_sizes[] = { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 835 | FRAG_SZ0, |
| 836 | FRAG_SZ1, |
| 837 | FRAG_SZ2, |
| 838 | FRAG_SZ3 |
| 839 | }; |
| 840 | |
| 841 | void mlx4_en_calc_rx_buf(struct net_device *dev) |
| 842 | { |
| 843 | struct mlx4_en_priv *priv = netdev_priv(dev); |
| 844 | int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE; |
| 845 | int buf_size = 0; |
| 846 | int i = 0; |
| 847 | |
| 848 | while (buf_size < eff_mtu) { |
| 849 | priv->frag_info[i].frag_size = |
| 850 | (eff_mtu > buf_size + frag_sizes[i]) ? |
| 851 | frag_sizes[i] : eff_mtu - buf_size; |
| 852 | priv->frag_info[i].frag_prefix_size = buf_size; |
| 853 | if (!i) { |
| 854 | priv->frag_info[i].frag_align = NET_IP_ALIGN; |
| 855 | priv->frag_info[i].frag_stride = |
| 856 | ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES); |
| 857 | } else { |
| 858 | priv->frag_info[i].frag_align = 0; |
| 859 | priv->frag_info[i].frag_stride = |
| 860 | ALIGN(frag_sizes[i], SMP_CACHE_BYTES); |
| 861 | } |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 862 | buf_size += priv->frag_info[i].frag_size; |
| 863 | i++; |
| 864 | } |
| 865 | |
| 866 | priv->num_frags = i; |
| 867 | priv->rx_skb_size = eff_mtu; |
Thadeu Lima de Souza Cascardo | 4cce66c | 2012-07-16 07:01:53 +0000 | [diff] [blame] | 868 | priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct mlx4_en_rx_alloc)); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 869 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 870 | en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d " |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 871 | "num_frags:%d):\n", eff_mtu, priv->num_frags); |
| 872 | for (i = 0; i < priv->num_frags; i++) { |
Eric Dumazet | 51151a1 | 2013-06-23 08:17:56 -0700 | [diff] [blame] | 873 | en_err(priv, |
| 874 | " frag:%d - size:%d prefix:%d align:%d stride:%d\n", |
| 875 | i, |
| 876 | priv->frag_info[i].frag_size, |
| 877 | priv->frag_info[i].frag_prefix_size, |
| 878 | priv->frag_info[i].frag_align, |
| 879 | priv->frag_info[i].frag_stride); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 880 | } |
| 881 | } |
| 882 | |
| 883 | /* RSS related functions */ |
| 884 | |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 885 | static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn, |
| 886 | struct mlx4_en_rx_ring *ring, |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 887 | enum mlx4_qp_state *state, |
| 888 | struct mlx4_qp *qp) |
| 889 | { |
| 890 | struct mlx4_en_dev *mdev = priv->mdev; |
| 891 | struct mlx4_qp_context *context; |
| 892 | int err = 0; |
| 893 | |
Joe Perches | 14f8dc4 | 2013-02-07 11:46:27 +0000 | [diff] [blame] | 894 | context = kmalloc(sizeof(*context), GFP_KERNEL); |
| 895 | if (!context) |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 896 | return -ENOMEM; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 897 | |
| 898 | err = mlx4_qp_alloc(mdev->dev, qpn, qp); |
| 899 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 900 | en_err(priv, "Failed to allocate qp #%x\n", qpn); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 901 | goto out; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 902 | } |
| 903 | qp->event = mlx4_en_sqp_event; |
| 904 | |
| 905 | memset(context, 0, sizeof *context); |
Yevgeny Petrilin | 00d7d7b | 2010-08-24 03:45:20 +0000 | [diff] [blame] | 906 | mlx4_en_fill_qp_context(priv, ring->actual_size, ring->stride, 0, 0, |
Amir Vadai | 0e98b52 | 2012-04-04 21:33:24 +0000 | [diff] [blame] | 907 | qpn, ring->cqn, -1, context); |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 908 | context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 909 | |
Yevgeny Petrilin | f3a9d1f | 2011-10-18 01:50:42 +0000 | [diff] [blame] | 910 | /* Cancel FCS removal if FW allows */ |
Yevgeny Petrilin | 4a5f4dd | 2011-11-14 14:25:36 -0500 | [diff] [blame] | 911 | if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) { |
Yevgeny Petrilin | f3a9d1f | 2011-10-18 01:50:42 +0000 | [diff] [blame] | 912 | context->param3 |= cpu_to_be32(1 << 29); |
Yevgeny Petrilin | 4a5f4dd | 2011-11-14 14:25:36 -0500 | [diff] [blame] | 913 | ring->fcs_del = ETH_FCS_LEN; |
| 914 | } else |
| 915 | ring->fcs_del = 0; |
Yevgeny Petrilin | f3a9d1f | 2011-10-18 01:50:42 +0000 | [diff] [blame] | 916 | |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 917 | err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 918 | if (err) { |
| 919 | mlx4_qp_remove(mdev->dev, qp); |
| 920 | mlx4_qp_free(mdev->dev, qp); |
| 921 | } |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 922 | mlx4_en_update_rx_prod_db(ring); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 923 | out: |
| 924 | kfree(context); |
| 925 | return err; |
| 926 | } |
| 927 | |
Hadar Hen Zion | cabdc8ee | 2012-07-05 04:03:50 +0000 | [diff] [blame] | 928 | int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv) |
| 929 | { |
| 930 | int err; |
| 931 | u32 qpn; |
| 932 | |
| 933 | err = mlx4_qp_reserve_range(priv->mdev->dev, 1, 1, &qpn); |
| 934 | if (err) { |
| 935 | en_err(priv, "Failed reserving drop qpn\n"); |
| 936 | return err; |
| 937 | } |
| 938 | err = mlx4_qp_alloc(priv->mdev->dev, qpn, &priv->drop_qp); |
| 939 | if (err) { |
| 940 | en_err(priv, "Failed allocating drop qp\n"); |
| 941 | mlx4_qp_release_range(priv->mdev->dev, qpn, 1); |
| 942 | return err; |
| 943 | } |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv) |
| 949 | { |
| 950 | u32 qpn; |
| 951 | |
| 952 | qpn = priv->drop_qp.qpn; |
| 953 | mlx4_qp_remove(priv->mdev->dev, &priv->drop_qp); |
| 954 | mlx4_qp_free(priv->mdev->dev, &priv->drop_qp); |
| 955 | mlx4_qp_release_range(priv->mdev->dev, qpn, 1); |
| 956 | } |
| 957 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 958 | /* Allocate rx qp's and configure them according to rss map */ |
| 959 | int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) |
| 960 | { |
| 961 | struct mlx4_en_dev *mdev = priv->mdev; |
| 962 | struct mlx4_en_rss_map *rss_map = &priv->rss_map; |
| 963 | struct mlx4_qp_context context; |
Or Gerlitz | 876f6e6 | 2011-11-26 19:54:58 +0000 | [diff] [blame] | 964 | struct mlx4_rss_context *rss_context; |
Yevgeny Petrilin | 93d3e36 | 2012-01-17 22:54:55 +0000 | [diff] [blame] | 965 | int rss_rings; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 966 | void *ptr; |
Or Gerlitz | 876f6e6 | 2011-11-26 19:54:58 +0000 | [diff] [blame] | 967 | u8 rss_mask = (MLX4_RSS_IPV4 | MLX4_RSS_TCP_IPV4 | MLX4_RSS_IPV6 | |
Or Gerlitz | 1202d46 | 2011-11-26 19:55:02 +0000 | [diff] [blame] | 968 | MLX4_RSS_TCP_IPV6); |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 969 | int i, qpn; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 970 | int err = 0; |
| 971 | int good_qps = 0; |
Yevgeny Petrilin | ad86107 | 2011-10-18 01:51:24 +0000 | [diff] [blame] | 972 | static const u32 rsskey[10] = { 0xD181C62C, 0xF7F4DB5B, 0x1983A2FC, |
| 973 | 0x943E1ADB, 0xD9389E6B, 0xD1039C2C, 0xA74499AD, |
| 974 | 0x593D56D9, 0xF3253C06, 0x2ADC1FFC}; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 975 | |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 976 | en_dbg(DRV, priv, "Configuring rss steering\n"); |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 977 | err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num, |
| 978 | priv->rx_ring_num, |
| 979 | &rss_map->base_qpn); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 980 | if (err) { |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 981 | en_err(priv, "Failed reserving %d qps\n", priv->rx_ring_num); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 982 | return err; |
| 983 | } |
| 984 | |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 985 | for (i = 0; i < priv->rx_ring_num; i++) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 986 | qpn = rss_map->base_qpn + i; |
Yevgeny Petrilin | 9f519f6 | 2009-08-06 19:28:18 -0700 | [diff] [blame] | 987 | err = mlx4_en_config_rss_qp(priv, qpn, &priv->rx_ring[i], |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 988 | &rss_map->state[i], |
| 989 | &rss_map->qps[i]); |
| 990 | if (err) |
| 991 | goto rss_err; |
| 992 | |
| 993 | ++good_qps; |
| 994 | } |
| 995 | |
| 996 | /* Configure RSS indirection qp */ |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 997 | err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, &rss_map->indir_qp); |
| 998 | if (err) { |
Yevgeny Petrilin | 453a608 | 2009-06-01 20:27:13 +0000 | [diff] [blame] | 999 | en_err(priv, "Failed to allocate RSS indirection QP\n"); |
Yevgeny Petrilin | 1679200 | 2011-03-22 22:38:31 +0000 | [diff] [blame] | 1000 | goto rss_err; |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1001 | } |
| 1002 | rss_map->indir_qp.event = mlx4_en_sqp_event; |
| 1003 | mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn, |
Amir Vadai | 0e98b52 | 2012-04-04 21:33:24 +0000 | [diff] [blame] | 1004 | priv->rx_ring[0].cqn, -1, &context); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1005 | |
Yevgeny Petrilin | 93d3e36 | 2012-01-17 22:54:55 +0000 | [diff] [blame] | 1006 | if (!priv->prof->rss_rings || priv->prof->rss_rings > priv->rx_ring_num) |
| 1007 | rss_rings = priv->rx_ring_num; |
| 1008 | else |
| 1009 | rss_rings = priv->prof->rss_rings; |
| 1010 | |
Or Gerlitz | 876f6e6 | 2011-11-26 19:54:58 +0000 | [diff] [blame] | 1011 | ptr = ((void *) &context) + offsetof(struct mlx4_qp_context, pri_path) |
| 1012 | + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH; |
Joe Perches | 43d620c | 2011-06-16 19:08:06 +0000 | [diff] [blame] | 1013 | rss_context = ptr; |
Yevgeny Petrilin | 93d3e36 | 2012-01-17 22:54:55 +0000 | [diff] [blame] | 1014 | rss_context->base_qpn = cpu_to_be32(ilog2(rss_rings) << 24 | |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1015 | (rss_map->base_qpn)); |
Yevgeny Petrilin | 89efea2 | 2011-12-19 21:53:38 +0000 | [diff] [blame] | 1016 | rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn); |
Or Gerlitz | 1202d46 | 2011-11-26 19:55:02 +0000 | [diff] [blame] | 1017 | if (priv->mdev->profile.udp_rss) { |
| 1018 | rss_mask |= MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6; |
| 1019 | rss_context->base_qpn_udp = rss_context->default_qpn; |
| 1020 | } |
Yevgeny Petrilin | 0533943 | 2010-08-24 03:46:42 +0000 | [diff] [blame] | 1021 | rss_context->flags = rss_mask; |
Or Gerlitz | 876f6e6 | 2011-11-26 19:54:58 +0000 | [diff] [blame] | 1022 | rss_context->hash_fn = MLX4_RSS_HASH_TOP; |
Yevgeny Petrilin | ad86107 | 2011-10-18 01:51:24 +0000 | [diff] [blame] | 1023 | for (i = 0; i < 10; i++) |
Yevgeny Petrilin | 39b2c4e | 2012-03-06 04:04:07 +0000 | [diff] [blame] | 1024 | rss_context->rss_key[i] = cpu_to_be32(rsskey[i]); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1025 | |
| 1026 | err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context, |
| 1027 | &rss_map->indir_qp, &rss_map->indir_state); |
| 1028 | if (err) |
| 1029 | goto indir_err; |
| 1030 | |
| 1031 | return 0; |
| 1032 | |
| 1033 | indir_err: |
| 1034 | mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state, |
| 1035 | MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp); |
| 1036 | mlx4_qp_remove(mdev->dev, &rss_map->indir_qp); |
| 1037 | mlx4_qp_free(mdev->dev, &rss_map->indir_qp); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1038 | rss_err: |
| 1039 | for (i = 0; i < good_qps; i++) { |
| 1040 | mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i], |
| 1041 | MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]); |
| 1042 | mlx4_qp_remove(mdev->dev, &rss_map->qps[i]); |
| 1043 | mlx4_qp_free(mdev->dev, &rss_map->qps[i]); |
| 1044 | } |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 1045 | mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1046 | return err; |
| 1047 | } |
| 1048 | |
| 1049 | void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv) |
| 1050 | { |
| 1051 | struct mlx4_en_dev *mdev = priv->mdev; |
| 1052 | struct mlx4_en_rss_map *rss_map = &priv->rss_map; |
| 1053 | int i; |
| 1054 | |
| 1055 | mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state, |
| 1056 | MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp); |
| 1057 | mlx4_qp_remove(mdev->dev, &rss_map->indir_qp); |
| 1058 | mlx4_qp_free(mdev->dev, &rss_map->indir_qp); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1059 | |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 1060 | for (i = 0; i < priv->rx_ring_num; i++) { |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1061 | mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i], |
| 1062 | MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]); |
| 1063 | mlx4_qp_remove(mdev->dev, &rss_map->qps[i]); |
| 1064 | mlx4_qp_free(mdev->dev, &rss_map->qps[i]); |
| 1065 | } |
Yevgeny Petrilin | b6b912e | 2009-08-06 19:27:51 -0700 | [diff] [blame] | 1066 | mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num); |
Yevgeny Petrilin | c27a02c | 2008-10-22 15:47:49 -0700 | [diff] [blame] | 1067 | } |