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) |
| 59 | pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages, |
| 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) |
| 72 | dma_free_coherent(&dev->pdev->dev, chunk->mem[i].length, |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 73 | lowmem_page_address(sg_page(&chunk->mem[i])), |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 74 | sg_dma_address(&chunk->mem[i])); |
| 75 | } |
| 76 | |
| 77 | void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent) |
| 78 | { |
| 79 | struct mlx4_icm_chunk *chunk, *tmp; |
| 80 | |
| 81 | if (!icm) |
| 82 | return; |
| 83 | |
| 84 | list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) { |
| 85 | if (coherent) |
| 86 | mlx4_free_icm_coherent(dev, chunk); |
| 87 | else |
| 88 | mlx4_free_icm_pages(dev, chunk); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 89 | |
| 90 | kfree(chunk); |
| 91 | } |
| 92 | |
| 93 | kfree(icm); |
| 94 | } |
| 95 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 96 | static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order, |
| 97 | gfp_t gfp_mask, int node) |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 98 | { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 99 | struct page *page; |
| 100 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 101 | page = alloc_pages_node(node, gfp_mask, order); |
| 102 | if (!page) { |
| 103 | page = alloc_pages(gfp_mask, order); |
| 104 | if (!page) |
| 105 | return -ENOMEM; |
| 106 | } |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 107 | |
Jens Axboe | 642f149 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 108 | sg_set_page(mem, page, PAGE_SIZE << order, 0); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static int mlx4_alloc_icm_coherent(struct device *dev, struct scatterlist *mem, |
| 113 | int order, gfp_t gfp_mask) |
| 114 | { |
| 115 | void *buf = dma_alloc_coherent(dev, PAGE_SIZE << order, |
| 116 | &sg_dma_address(mem), gfp_mask); |
| 117 | if (!buf) |
| 118 | return -ENOMEM; |
| 119 | |
| 120 | sg_set_buf(mem, buf, PAGE_SIZE << order); |
| 121 | BUG_ON(mem->offset); |
| 122 | sg_dma_len(mem) = PAGE_SIZE << order; |
| 123 | return 0; |
| 124 | } |
| 125 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 126 | struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 127 | gfp_t gfp_mask, int coherent) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 128 | { |
| 129 | struct mlx4_icm *icm; |
| 130 | struct mlx4_icm_chunk *chunk = NULL; |
| 131 | int cur_order; |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 132 | int ret; |
| 133 | |
| 134 | /* We use sg_set_buf for coherent allocs, which assumes low memory */ |
| 135 | BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM)); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 136 | |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 137 | icm = kmalloc_node(sizeof(*icm), |
| 138 | gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN), |
| 139 | dev->numa_node); |
| 140 | if (!icm) { |
| 141 | icm = kmalloc(sizeof(*icm), |
| 142 | gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); |
| 143 | if (!icm) |
| 144 | return NULL; |
| 145 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 146 | |
| 147 | icm->refcount = 0; |
| 148 | INIT_LIST_HEAD(&icm->chunk_list); |
| 149 | |
| 150 | cur_order = get_order(MLX4_ICM_ALLOC_SIZE); |
| 151 | |
| 152 | while (npages > 0) { |
| 153 | if (!chunk) { |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 154 | chunk = kmalloc_node(sizeof(*chunk), |
| 155 | gfp_mask & ~(__GFP_HIGHMEM | |
| 156 | __GFP_NOWARN), |
| 157 | dev->numa_node); |
| 158 | if (!chunk) { |
| 159 | chunk = kmalloc(sizeof(*chunk), |
| 160 | gfp_mask & ~(__GFP_HIGHMEM | |
| 161 | __GFP_NOWARN)); |
| 162 | if (!chunk) |
| 163 | goto fail; |
| 164 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 165 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 166 | sg_init_table(chunk->mem, MLX4_ICM_CHUNK_LEN); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 167 | chunk->npages = 0; |
| 168 | chunk->nsg = 0; |
| 169 | list_add_tail(&chunk->list, &icm->chunk_list); |
| 170 | } |
| 171 | |
| 172 | while (1 << cur_order > npages) |
| 173 | --cur_order; |
| 174 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 175 | if (coherent) |
| 176 | ret = mlx4_alloc_icm_coherent(&dev->pdev->dev, |
| 177 | &chunk->mem[chunk->npages], |
| 178 | cur_order, gfp_mask); |
| 179 | else |
| 180 | ret = mlx4_alloc_icm_pages(&chunk->mem[chunk->npages], |
Eugenia Emantayev | 6e7136e | 2013-11-07 12:19:53 +0200 | [diff] [blame] | 181 | cur_order, gfp_mask, |
| 182 | dev->numa_node); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 183 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 184 | if (ret) { |
| 185 | if (--cur_order < 0) |
| 186 | goto fail; |
| 187 | else |
| 188 | continue; |
| 189 | } |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 190 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 191 | ++chunk->npages; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 192 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 193 | if (coherent) |
| 194 | ++chunk->nsg; |
| 195 | else if (chunk->npages == MLX4_ICM_CHUNK_LEN) { |
| 196 | chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, |
| 197 | chunk->npages, |
| 198 | PCI_DMA_BIDIRECTIONAL); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 199 | |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 200 | if (chunk->nsg <= 0) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 201 | goto fail; |
| 202 | } |
Roland Dreier | c050def | 2010-05-20 15:58:22 -0700 | [diff] [blame] | 203 | |
| 204 | if (chunk->npages == MLX4_ICM_CHUNK_LEN) |
| 205 | chunk = NULL; |
| 206 | |
| 207 | npages -= 1 << cur_order; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 210 | if (!coherent && chunk) { |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 211 | chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, |
| 212 | chunk->npages, |
| 213 | PCI_DMA_BIDIRECTIONAL); |
| 214 | |
| 215 | if (chunk->nsg <= 0) |
| 216 | goto fail; |
| 217 | } |
| 218 | |
| 219 | return icm; |
| 220 | |
| 221 | fail: |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 222 | mlx4_free_icm(dev, icm, coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 223 | return NULL; |
| 224 | } |
| 225 | |
| 226 | static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt) |
| 227 | { |
| 228 | return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt); |
| 229 | } |
| 230 | |
stephen hemminger | 9740d78 | 2010-10-21 06:59:20 +0000 | [diff] [blame] | 231 | 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] | 232 | { |
| 233 | return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM, |
Jack Morgenstein | f9baff5 | 2011-12-13 04:10:51 +0000 | [diff] [blame] | 234 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 237 | int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm) |
| 238 | { |
| 239 | return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1); |
| 240 | } |
| 241 | |
| 242 | int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev) |
| 243 | { |
Jack Morgenstein | f9baff5 | 2011-12-13 04:10:51 +0000 | [diff] [blame] | 244 | return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX, |
| 245 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 248 | int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 249 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 250 | u32 i = (obj & (table->num_obj - 1)) / |
| 251 | (MLX4_TABLE_CHUNK_SIZE / table->obj_size); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 252 | int ret = 0; |
| 253 | |
| 254 | mutex_lock(&table->mutex); |
| 255 | |
| 256 | if (table->icm[i]) { |
| 257 | ++table->icm[i]->refcount; |
| 258 | goto out; |
| 259 | } |
| 260 | |
| 261 | table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT, |
| 262 | (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 263 | __GFP_NOWARN, table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 264 | if (!table->icm[i]) { |
| 265 | ret = -ENOMEM; |
| 266 | goto out; |
| 267 | } |
| 268 | |
| 269 | if (mlx4_MAP_ICM(dev, table->icm[i], table->virt + |
| 270 | (u64) i * MLX4_TABLE_CHUNK_SIZE)) { |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 271 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 272 | table->icm[i] = NULL; |
| 273 | ret = -ENOMEM; |
| 274 | goto out; |
| 275 | } |
| 276 | |
| 277 | ++table->icm[i]->refcount; |
| 278 | |
| 279 | out: |
| 280 | mutex_unlock(&table->mutex); |
| 281 | return ret; |
| 282 | } |
| 283 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 284 | 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] | 285 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 286 | u32 i; |
| 287 | u64 offset; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 288 | |
| 289 | i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size); |
| 290 | |
| 291 | mutex_lock(&table->mutex); |
| 292 | |
| 293 | if (--table->icm[i]->refcount == 0) { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 294 | offset = (u64) i * MLX4_TABLE_CHUNK_SIZE; |
| 295 | mlx4_UNMAP_ICM(dev, table->virt + offset, |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 296 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 297 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 298 | table->icm[i] = NULL; |
| 299 | } |
| 300 | |
| 301 | mutex_unlock(&table->mutex); |
| 302 | } |
| 303 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 304 | void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj, |
| 305 | dma_addr_t *dma_handle) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 306 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 307 | int offset, dma_offset, i; |
| 308 | u64 idx; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 309 | struct mlx4_icm_chunk *chunk; |
| 310 | struct mlx4_icm *icm; |
| 311 | struct page *page = NULL; |
| 312 | |
| 313 | if (!table->lowmem) |
| 314 | return NULL; |
| 315 | |
| 316 | mutex_lock(&table->mutex); |
| 317 | |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 318 | idx = (u64) (obj & (table->num_obj - 1)) * table->obj_size; |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 319 | icm = table->icm[idx / MLX4_TABLE_CHUNK_SIZE]; |
| 320 | dma_offset = offset = idx % MLX4_TABLE_CHUNK_SIZE; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 321 | |
| 322 | if (!icm) |
| 323 | goto out; |
| 324 | |
| 325 | list_for_each_entry(chunk, &icm->chunk_list, list) { |
| 326 | for (i = 0; i < chunk->npages; ++i) { |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 327 | if (dma_handle && dma_offset >= 0) { |
| 328 | if (sg_dma_len(&chunk->mem[i]) > dma_offset) |
| 329 | *dma_handle = sg_dma_address(&chunk->mem[i]) + |
| 330 | dma_offset; |
| 331 | dma_offset -= sg_dma_len(&chunk->mem[i]); |
| 332 | } |
| 333 | /* |
| 334 | * DMA mapping can merge pages but not split them, |
| 335 | * so if we found the page, dma_handle has already |
| 336 | * been assigned to. |
| 337 | */ |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 338 | if (chunk->mem[i].length > offset) { |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 339 | page = sg_page(&chunk->mem[i]); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 340 | goto out; |
| 341 | } |
| 342 | offset -= chunk->mem[i].length; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | out: |
| 347 | mutex_unlock(&table->mutex); |
| 348 | return page ? lowmem_page_address(page) + offset : NULL; |
| 349 | } |
| 350 | |
| 351 | 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] | 352 | u32 start, u32 end) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 353 | { |
| 354 | int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size; |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 355 | int err; |
| 356 | u32 i; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 357 | |
| 358 | for (i = start; i <= end; i += inc) { |
| 359 | err = mlx4_table_get(dev, table, i); |
| 360 | if (err) |
| 361 | goto fail; |
| 362 | } |
| 363 | |
| 364 | return 0; |
| 365 | |
| 366 | fail: |
| 367 | while (i > start) { |
| 368 | i -= inc; |
| 369 | mlx4_table_put(dev, table, i); |
| 370 | } |
| 371 | |
| 372 | return err; |
| 373 | } |
| 374 | |
| 375 | 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] | 376 | u32 start, u32 end) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 377 | { |
Yishai Hadas | dd03e73 | 2012-08-29 15:14:35 +0000 | [diff] [blame] | 378 | u32 i; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 379 | |
| 380 | for (i = start; i <= end; i += MLX4_TABLE_CHUNK_SIZE / table->obj_size) |
| 381 | mlx4_table_put(dev, table, i); |
| 382 | } |
| 383 | |
| 384 | 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] | 385 | u64 virt, int obj_size, u32 nobj, int reserved, |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 386 | int use_lowmem, int use_coherent) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 387 | { |
| 388 | int obj_per_chunk; |
| 389 | int num_icm; |
| 390 | unsigned chunk_size; |
| 391 | int i; |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 392 | u64 size; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 393 | |
| 394 | obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size; |
| 395 | num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk; |
| 396 | |
| 397 | table->icm = kcalloc(num_icm, sizeof *table->icm, GFP_KERNEL); |
| 398 | if (!table->icm) |
| 399 | return -ENOMEM; |
| 400 | table->virt = virt; |
| 401 | table->num_icm = num_icm; |
| 402 | table->num_obj = nobj; |
| 403 | table->obj_size = obj_size; |
| 404 | table->lowmem = use_lowmem; |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 405 | table->coherent = use_coherent; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 406 | mutex_init(&table->mutex); |
| 407 | |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 408 | size = (u64) nobj * obj_size; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 409 | for (i = 0; i * MLX4_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) { |
| 410 | chunk_size = MLX4_TABLE_CHUNK_SIZE; |
Yishai Hadas | 3de819e | 2012-08-13 08:15:07 +0000 | [diff] [blame] | 411 | if ((i + 1) * MLX4_TABLE_CHUNK_SIZE > size) |
| 412 | chunk_size = PAGE_ALIGN(size - |
| 413 | i * MLX4_TABLE_CHUNK_SIZE); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 414 | |
| 415 | table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT, |
| 416 | (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) | |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 417 | __GFP_NOWARN, use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 418 | if (!table->icm[i]) |
| 419 | goto err; |
| 420 | 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] | 421 | mlx4_free_icm(dev, table->icm[i], use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 422 | table->icm[i] = NULL; |
| 423 | goto err; |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Add a reference to this ICM chunk so that it never |
| 428 | * gets freed (since it contains reserved firmware objects). |
| 429 | */ |
| 430 | ++table->icm[i]->refcount; |
| 431 | } |
| 432 | |
| 433 | return 0; |
| 434 | |
| 435 | err: |
| 436 | for (i = 0; i < num_icm; ++i) |
| 437 | if (table->icm[i]) { |
| 438 | mlx4_UNMAP_ICM(dev, virt + i * MLX4_TABLE_CHUNK_SIZE, |
| 439 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 440 | mlx4_free_icm(dev, table->icm[i], use_coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 441 | } |
| 442 | |
Dotan Barak | 240a920 | 2012-07-11 15:39:32 +0000 | [diff] [blame] | 443 | kfree(table->icm); |
| 444 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 445 | return -ENOMEM; |
| 446 | } |
| 447 | |
| 448 | void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table) |
| 449 | { |
| 450 | int i; |
| 451 | |
| 452 | for (i = 0; i < table->num_icm; ++i) |
| 453 | if (table->icm[i]) { |
| 454 | mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE, |
| 455 | MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE); |
Jack Morgenstein | 5b0bf5e | 2007-08-01 12:28:20 +0300 | [diff] [blame] | 456 | mlx4_free_icm(dev, table->icm[i], table->coherent); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | kfree(table->icm); |
| 460 | } |