Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 1 | /* |
Jack Morgenstein | 51a379d | 2008-07-25 10:32:52 -0700 | [diff] [blame] | 2 | * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 3 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 34 | #include <linux/errno.h> |
Al Viro | 9cbe05c | 2007-05-15 20:36:30 +0100 | [diff] [blame] | 35 | #include <linux/mm.h> |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 36 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 38 | |
| 39 | #include <linux/mlx4/cmd.h> |
| 40 | |
| 41 | #include "mlx4.h" |
| 42 | #include "icm.h" |
| 43 | #include "fw.h" |
| 44 | |
| 45 | /* |
| 46 | * We allocate in as big chunks as we can, up to a maximum of 256 KB |
| 47 | * per chunk. |
| 48 | */ |
| 49 | enum { |
| 50 | MLX4_ICM_ALLOC_SIZE = 1 << 18, |
| 51 | MLX4_TABLE_CHUNK_SIZE = 1 << 18 |
| 52 | }; |
| 53 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 54 | static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 55 | { |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 56 | int i; |
| 57 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 58 | if (chunk->nsg > 0) |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 59 | pci_unmap_sg(dev->persist->pdev, chunk->mem, chunk->npages, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 60 | PCI_DMA_BIDIRECTIONAL); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 61 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 62 | for (i = 0; i < chunk->npages; ++i) |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 63 | __free_pages(sg_page(&chunk->mem[i]), |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 64 | get_order(chunk->mem[i].length)); |
| 65 | } |
| 66 | |
| 67 | static void mlx4_free_icm_coherent(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk) |
| 68 | { |
| 69 | int i; |
| 70 | |
| 71 | for (i = 0; i < chunk->npages; ++i) |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 72 | dma_free_coherent(&dev->persist->pdev->dev, |
| 73 | chunk->mem[i].length, |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 74 | lowmem_page_address(sg_page(&chunk->mem[i])), |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 75 | sg_dma_address(&chunk->mem[i])); |
| 76 | } |
| 77 | |
| 78 | void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent) |
| 79 | { |
| 80 | struct mlx4_icm_chunk *chunk, *tmp; |
| 81 | |
| 82 | if (!icm) |
| 83 | return; |
| 84 | |
| 85 | list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) { |
| 86 | if (coherent) |
| 87 | mlx4_free_icm_coherent(dev, chunk); |
| 88 | else |
| 89 | mlx4_free_icm_pages(dev, chunk); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 90 | |
| 91 | kfree(chunk); |
| 92 | } |
| 93 | |
| 94 | kfree(icm); |
| 95 | } |
| 96 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 97 | static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order, |
| 98 | gfp_t gfp_mask, int node) |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 99 | { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 100 | struct page *page; |
| 101 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 102 | page = alloc_pages_node(node, gfp_mask, order); |
| 103 | if (!page) { |
| 104 | page = alloc_pages(gfp_mask, order); |
| 105 | if (!page) |
| 106 | return -ENOMEM; |
| 107 | } |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 108 | |
Jens Axboe | 642f149 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 109 | sg_set_page(mem, page, PAGE_SIZE << order, 0); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int mlx4_alloc_icm_coherent(struct device *dev, struct scatterlist *mem, |
| 114 | int order, gfp_t gfp_mask) |
| 115 | { |
| 116 | void *buf = dma_alloc_coherent(dev, PAGE_SIZE << order, |
| 117 | &sg_dma_address(mem), gfp_mask); |
| 118 | if (!buf) |
| 119 | return -ENOMEM; |
| 120 | |
Leon Romanovsky | 7e150f7 | 2016-12-29 18:37:11 +0200 | [diff] [blame] | 121 | if (offset_in_page(buf)) { |
| 122 | dma_free_coherent(dev, PAGE_SIZE << order, |
| 123 | buf, sg_dma_address(mem)); |
| 124 | return -ENOMEM; |
| 125 | } |
| 126 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 127 | sg_set_buf(mem, buf, PAGE_SIZE << order); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 128 | sg_dma_len(mem) = PAGE_SIZE << order; |
| 129 | return 0; |
| 130 | } |
| 131 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 132 | struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 133 | gfp_t gfp_mask, int coherent) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 134 | { |
| 135 | struct mlx4_icm *icm; |
| 136 | struct mlx4_icm_chunk *chunk = NULL; |
| 137 | int cur_order; |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 138 | int ret; |
| 139 | |
| 140 | /* We use sg_set_buf for coherent allocs, which assumes low memory */ |
| 141 | BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM)); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 142 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 143 | icm = kmalloc_node(sizeof(*icm), |
| 144 | gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN), |
| 145 | dev->numa_node); |
| 146 | if (!icm) { |
| 147 | icm = kmalloc(sizeof(*icm), |
| 148 | gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); |
| 149 | if (!icm) |
| 150 | return NULL; |
| 151 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 152 | |
| 153 | icm->refcount = 0; |
| 154 | INIT_LIST_HEAD(&icm->chunk_list); |
| 155 | |
| 156 | cur_order = get_order(MLX4_ICM_ALLOC_SIZE); |
| 157 | |
| 158 | while (npages > 0) { |
| 159 | if (!chunk) { |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 160 | chunk = kmalloc_node(sizeof(*chunk), |
| 161 | gfp_mask & ~(__GFP_HIGHMEM | |
| 162 | __GFP_NOWARN), |
| 163 | dev->numa_node); |
| 164 | if (!chunk) { |
| 165 | chunk = kmalloc(sizeof(*chunk), |
| 166 | gfp_mask & ~(__GFP_HIGHMEM | |
| 167 | __GFP_NOWARN)); |
| 168 | if (!chunk) |
| 169 | goto fail; |
| 170 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 171 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 172 | sg_init_table(chunk->mem, MLX4_ICM_CHUNK_LEN); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 173 | chunk->npages = 0; |
| 174 | chunk->nsg = 0; |
| 175 | list_add_tail(&chunk->list, &icm->chunk_list); |
| 176 | } |
| 177 | |
| 178 | while (1 << cur_order > npages) |
| 179 | --cur_order; |
| 180 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 181 | if (coherent) |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 182 | ret = mlx4_alloc_icm_coherent(&dev->persist->pdev->dev, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 183 | &chunk->mem[chunk->npages], |
| 184 | cur_order, gfp_mask); |
| 185 | else |
| 186 | ret = mlx4_alloc_icm_pages(&chunk->mem[chunk->npages], |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 187 | cur_order, gfp_mask, |
| 188 | dev->numa_node); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 189 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 190 | if (ret) { |
| 191 | if (--cur_order < 0) |
| 192 | goto fail; |
| 193 | else |
| 194 | continue; |
| 195 | } |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 196 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 197 | ++chunk->npages; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 198 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 199 | if (coherent) |
| 200 | ++chunk->nsg; |
| 201 | else if (chunk->npages == MLX4_ICM_CHUNK_LEN) { |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 202 | chunk->nsg = pci_map_sg(dev->persist->pdev, chunk->mem, |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 203 | chunk->npages, |
| 204 | PCI_DMA_BIDIRECTIONAL); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 205 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 206 | if (chunk->nsg <= 0) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 207 | goto fail; |
| 208 | } |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 209 | |
| 210 | if (chunk->npages == MLX4_ICM_CHUNK_LEN) |
| 211 | chunk = NULL; |
| 212 | |
| 213 | npages -= 1 << cur_order; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 216 | if (!coherent && chunk) { |
Yishai Hadas | 872bf2f | 2015-01-25 16:59:35 +0200 | [diff] [blame] | 217 | chunk->nsg = pci_map_sg(dev->persist->pdev, chunk->mem, |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 218 | chunk->npages, |
| 219 | PCI_DMA_BIDIRECTIONAL); |
| 220 | |
| 221 | if (chunk->nsg <= 0) |
| 222 | goto fail; |
| 223 | } |
| 224 | |
| 225 | return icm; |
| 226 | |
| 227 | fail: |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 228 | mlx4_free_icm(dev, icm, coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 229 | return NULL; |
| 230 | } |
| 231 | |
| 232 | static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt) |
| 233 | { |
| 234 | return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt); |
| 235 | } |
| 236 | |
stephen hemminger | 9740d78 | 2010-10-21 06:59:20 +0000 | [diff] [blame] | 237 | static int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 238 | { |
| 239 | return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM, |
Jack Morgenstein | f9baff5 | 2011-12-13 04:10:51 +0000 | [diff] [blame] | 240 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 243 | int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm) |
| 244 | { |
| 245 | return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1); |
| 246 | } |
| 247 | |
| 248 | int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev) |
| 249 | { |
Jack Morgenstein | f9baff5 | 2011-12-13 04:10:51 +0000 | [diff] [blame] | 250 | return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX, |
| 251 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 252 | } |
| 253 | |
Jiri Kosina | 40f2287 | 2014-05-11 15:15:12 +0300 | [diff] [blame] | 254 | int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj, |
Roland Dreier | 4e2c341 | 2014-06-04 10:19:13 -0700 | [diff] [blame] | 255 | gfp_t gfp) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 256 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 257 | u32 i = (obj & (table->num_obj - 1)) / |
| 258 | (MLX4_TABLE_CHUNK_SIZE / table->obj_size); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 259 | int ret = 0; |
| 260 | |
| 261 | mutex_lock(&table->mutex); |
| 262 | |
| 263 | if (table->icm[i]) { |
| 264 | ++table->icm[i]->refcount; |
| 265 | goto out; |
| 266 | } |
| 267 | |
| 268 | table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT, |
Jiri Kosina | 40f2287 | 2014-05-11 15:15:12 +0300 | [diff] [blame] | 269 | (table->lowmem ? gfp : GFP_HIGHUSER) | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 270 | __GFP_NOWARN, table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 271 | if (!table->icm[i]) { |
| 272 | ret = -ENOMEM; |
| 273 | goto out; |
| 274 | } |
| 275 | |
| 276 | if (mlx4_MAP_ICM(dev, table->icm[i], table->virt + |
| 277 | (u64) i * MLX4_TABLE_CHUNK_SIZE)) { |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 278 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 279 | table->icm[i] = NULL; |
| 280 | ret = -ENOMEM; |
| 281 | goto out; |
| 282 | } |
| 283 | |
| 284 | ++table->icm[i]->refcount; |
| 285 | |
| 286 | out: |
| 287 | mutex_unlock(&table->mutex); |
| 288 | return ret; |
| 289 | } |
| 290 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 291 | void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 292 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 293 | u32 i; |
| 294 | u64 offset; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 295 | |
| 296 | i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size); |
| 297 | |
| 298 | mutex_lock(&table->mutex); |
| 299 | |
| 300 | if (--table->icm[i]->refcount == 0) { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 301 | offset = (u64) i * MLX4_TABLE_CHUNK_SIZE; |
| 302 | mlx4_UNMAP_ICM(dev, table->virt + offset, |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 303 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 304 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 305 | table->icm[i] = NULL; |
| 306 | } |
| 307 | |
| 308 | mutex_unlock(&table->mutex); |
| 309 | } |
| 310 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 311 | void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj, |
| 312 | dma_addr_t *dma_handle) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 313 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 314 | int offset, dma_offset, i; |
| 315 | u64 idx; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 316 | struct mlx4_icm_chunk *chunk; |
| 317 | struct mlx4_icm *icm; |
| 318 | struct page *page = NULL; |
| 319 | |
| 320 | if (!table->lowmem) |
| 321 | return NULL; |
| 322 | |
| 323 | mutex_lock(&table->mutex); |
| 324 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 325 | idx = (u64) (obj & (table->num_obj - 1)) * table->obj_size; |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 326 | icm = table->icm[idx / MLX4_TABLE_CHUNK_SIZE]; |
| 327 | dma_offset = offset = idx % MLX4_TABLE_CHUNK_SIZE; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 328 | |
| 329 | if (!icm) |
| 330 | goto out; |
| 331 | |
| 332 | list_for_each_entry(chunk, &icm->chunk_list, list) { |
| 333 | for (i = 0; i < chunk->npages; ++i) { |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 334 | if (dma_handle && dma_offset >= 0) { |
| 335 | if (sg_dma_len(&chunk->mem[i]) > dma_offset) |
| 336 | *dma_handle = sg_dma_address(&chunk->mem[i]) + |
| 337 | dma_offset; |
| 338 | dma_offset -= sg_dma_len(&chunk->mem[i]); |
| 339 | } |
| 340 | /* |
| 341 | * DMA mapping can merge pages but not split them, |
| 342 | * so if we found the page, dma_handle has already |
| 343 | * been assigned to. |
| 344 | */ |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 345 | if (chunk->mem[i].length > offset) { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 346 | page = sg_page(&chunk->mem[i]); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 347 | goto out; |
| 348 | } |
| 349 | offset -= chunk->mem[i].length; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | out: |
| 354 | mutex_unlock(&table->mutex); |
| 355 | return page ? lowmem_page_address(page) + offset : NULL; |
| 356 | } |
| 357 | |
| 358 | int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 359 | u32 start, u32 end) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 360 | { |
| 361 | int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size; |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 362 | int err; |
| 363 | u32 i; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 364 | |
| 365 | for (i = start; i <= end; i += inc) { |
Jiri Kosina | 40f2287 | 2014-05-11 15:15:12 +0300 | [diff] [blame] | 366 | err = mlx4_table_get(dev, table, i, GFP_KERNEL); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 367 | if (err) |
| 368 | goto fail; |
| 369 | } |
| 370 | |
| 371 | return 0; |
| 372 | |
| 373 | fail: |
| 374 | while (i > start) { |
| 375 | i -= inc; |
| 376 | mlx4_table_put(dev, table, i); |
| 377 | } |
| 378 | |
| 379 | return err; |
| 380 | } |
| 381 | |
| 382 | void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 383 | u32 start, u32 end) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 384 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 385 | u32 i; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 386 | |
| 387 | for (i = start; i <= end; i += MLX4_TABLE_CHUNK_SIZE / table->obj_size) |
| 388 | mlx4_table_put(dev, table, i); |
| 389 | } |
| 390 | |
| 391 | int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table, |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 392 | u64 virt, int obj_size, u32 nobj, int reserved, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 393 | int use_lowmem, int use_coherent) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 394 | { |
| 395 | int obj_per_chunk; |
| 396 | int num_icm; |
| 397 | unsigned chunk_size; |
| 398 | int i; |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 399 | u64 size; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 400 | |
| 401 | obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size; |
| 402 | num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk; |
| 403 | |
| 404 | table->icm = kcalloc(num_icm, sizeof *table->icm, GFP_KERNEL); |
| 405 | if (!table->icm) |
| 406 | return -ENOMEM; |
| 407 | table->virt = virt; |
| 408 | table->num_icm = num_icm; |
| 409 | table->num_obj = nobj; |
| 410 | table->obj_size = obj_size; |
| 411 | table->lowmem = use_lowmem; |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 412 | table->coherent = use_coherent; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 413 | mutex_init(&table->mutex); |
| 414 | |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 415 | size = (u64) nobj * obj_size; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 416 | for (i = 0; i * MLX4_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) { |
| 417 | chunk_size = MLX4_TABLE_CHUNK_SIZE; |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 418 | if ((i + 1) * MLX4_TABLE_CHUNK_SIZE > size) |
| 419 | chunk_size = PAGE_ALIGN(size - |
| 420 | i * MLX4_TABLE_CHUNK_SIZE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 421 | |
| 422 | table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT, |
| 423 | (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 424 | __GFP_NOWARN, use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 425 | if (!table->icm[i]) |
| 426 | goto err; |
| 427 | if (mlx4_MAP_ICM(dev, table->icm[i], virt + i * MLX4_TABLE_CHUNK_SIZE)) { |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 428 | mlx4_free_icm(dev, table->icm[i], use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 429 | table->icm[i] = NULL; |
| 430 | goto err; |
| 431 | } |
| 432 | |
| 433 | /* |
| 434 | * Add a reference to this ICM chunk so that it never |
| 435 | * gets freed (since it contains reserved firmware objects). |
| 436 | */ |
| 437 | ++table->icm[i]->refcount; |
| 438 | } |
| 439 | |
| 440 | return 0; |
| 441 | |
| 442 | err: |
| 443 | for (i = 0; i < num_icm; ++i) |
| 444 | if (table->icm[i]) { |
| 445 | mlx4_UNMAP_ICM(dev, virt + i * MLX4_TABLE_CHUNK_SIZE, |
| 446 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 447 | mlx4_free_icm(dev, table->icm[i], use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Dotan Barak | 240a920 | 2012-07-11 15:39:32 +0000 | [diff] [blame] | 450 | kfree(table->icm); |
| 451 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 452 | return -ENOMEM; |
| 453 | } |
| 454 | |
| 455 | void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table) |
| 456 | { |
| 457 | int i; |
| 458 | |
| 459 | for (i = 0; i < table->num_icm; ++i) |
| 460 | if (table->icm[i]) { |
| 461 | mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE, |
| 462 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 463 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | kfree(table->icm); |
| 467 | } |