1 /* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. 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 34 #include <linux/slab.h> 35 36 #include "mlx4_ib.h" 37 38 static u32 convert_access(int acc) 39 { 40 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) | 41 (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) | 42 (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) | 43 (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) | 44 MLX4_PERM_LOCAL_READ; 45 } 46 47 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) 48 { 49 struct mlx4_ib_mr *mr; 50 int err; 51 52 mr = kmalloc(sizeof *mr, GFP_KERNEL); 53 if (!mr) 54 return ERR_PTR(-ENOMEM); 55 56 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, 57 ~0ull, convert_access(acc), 0, 0, &mr->mmr); 58 if (err) 59 goto err_free; 60 61 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); 62 if (err) 63 goto err_mr; 64 65 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 66 mr->umem = NULL; 67 68 return &mr->ibmr; 69 70 err_mr: 71 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 72 73 err_free: 74 kfree(mr); 75 76 return ERR_PTR(err); 77 } 78 79 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, 80 struct ib_umem *umem) 81 { 82 u64 *pages; 83 struct ib_umem_chunk *chunk; 84 int i, j, k; 85 int n; 86 int len; 87 int err = 0; 88 89 pages = (u64 *) __get_free_page(GFP_KERNEL); 90 if (!pages) 91 return -ENOMEM; 92 93 i = n = 0; 94 95 list_for_each_entry(chunk, &umem->chunk_list, list) 96 for (j = 0; j < chunk->nmap; ++j) { 97 len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; 98 for (k = 0; k < len; ++k) { 99 pages[i++] = sg_dma_address(&chunk->page_list[j]) + 100 umem->page_size * k; 101 /* 102 * Be friendly to mlx4_write_mtt() and 103 * pass it chunks of appropriate size. 104 */ 105 if (i == PAGE_SIZE / sizeof (u64)) { 106 err = mlx4_write_mtt(dev->dev, mtt, n, 107 i, pages); 108 if (err) 109 goto out; 110 n += i; 111 i = 0; 112 } 113 } 114 } 115 116 if (i) 117 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); 118 119 out: 120 free_page((unsigned long) pages); 121 return err; 122 } 123 124 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 125 u64 virt_addr, int access_flags, 126 struct ib_udata *udata) 127 { 128 struct mlx4_ib_dev *dev = to_mdev(pd->device); 129 struct mlx4_ib_mr *mr; 130 int shift; 131 int err; 132 int n; 133 134 mr = kmalloc(sizeof *mr, GFP_KERNEL); 135 if (!mr) 136 return ERR_PTR(-ENOMEM); 137 138 mr->umem = ib_umem_get(pd->uobject->context, start, length, 139 access_flags, 0); 140 if (IS_ERR(mr->umem)) { 141 err = PTR_ERR(mr->umem); 142 goto err_free; 143 } 144 145 n = ib_umem_page_count(mr->umem); 146 shift = ilog2(mr->umem->page_size); 147 148 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, 149 convert_access(access_flags), n, shift, &mr->mmr); 150 if (err) 151 goto err_umem; 152 153 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); 154 if (err) 155 goto err_mr; 156 157 err = mlx4_mr_enable(dev->dev, &mr->mmr); 158 if (err) 159 goto err_mr; 160 161 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 162 163 return &mr->ibmr; 164 165 err_mr: 166 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 167 168 err_umem: 169 ib_umem_release(mr->umem); 170 171 err_free: 172 kfree(mr); 173 174 return ERR_PTR(err); 175 } 176 177 int mlx4_ib_dereg_mr(struct ib_mr *ibmr) 178 { 179 struct mlx4_ib_mr *mr = to_mmr(ibmr); 180 181 mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); 182 if (mr->umem) 183 ib_umem_release(mr->umem); 184 kfree(mr); 185 186 return 0; 187 } 188 189 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd, 190 int max_page_list_len) 191 { 192 struct mlx4_ib_dev *dev = to_mdev(pd->device); 193 struct mlx4_ib_mr *mr; 194 int err; 195 196 mr = kmalloc(sizeof *mr, GFP_KERNEL); 197 if (!mr) 198 return ERR_PTR(-ENOMEM); 199 200 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0, 201 max_page_list_len, 0, &mr->mmr); 202 if (err) 203 goto err_free; 204 205 err = mlx4_mr_enable(dev->dev, &mr->mmr); 206 if (err) 207 goto err_mr; 208 209 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 210 mr->umem = NULL; 211 212 return &mr->ibmr; 213 214 err_mr: 215 mlx4_mr_free(dev->dev, &mr->mmr); 216 217 err_free: 218 kfree(mr); 219 return ERR_PTR(err); 220 } 221 222 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, 223 int page_list_len) 224 { 225 struct mlx4_ib_dev *dev = to_mdev(ibdev); 226 struct mlx4_ib_fast_reg_page_list *mfrpl; 227 int size = page_list_len * sizeof (u64); 228 229 if (page_list_len > MLX4_MAX_FAST_REG_PAGES) 230 return ERR_PTR(-EINVAL); 231 232 mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL); 233 if (!mfrpl) 234 return ERR_PTR(-ENOMEM); 235 236 mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL); 237 if (!mfrpl->ibfrpl.page_list) 238 goto err_free; 239 240 mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev, 241 size, &mfrpl->map, 242 GFP_KERNEL); 243 if (!mfrpl->mapped_page_list) 244 goto err_free; 245 246 WARN_ON(mfrpl->map & 0x3f); 247 248 return &mfrpl->ibfrpl; 249 250 err_free: 251 kfree(mfrpl->ibfrpl.page_list); 252 kfree(mfrpl); 253 return ERR_PTR(-ENOMEM); 254 } 255 256 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) 257 { 258 struct mlx4_ib_dev *dev = to_mdev(page_list->device); 259 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list); 260 int size = page_list->max_page_list_len * sizeof (u64); 261 262 dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list, 263 mfrpl->map); 264 kfree(mfrpl->ibfrpl.page_list); 265 kfree(mfrpl); 266 } 267 268 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc, 269 struct ib_fmr_attr *fmr_attr) 270 { 271 struct mlx4_ib_dev *dev = to_mdev(pd->device); 272 struct mlx4_ib_fmr *fmr; 273 int err = -ENOMEM; 274 275 fmr = kmalloc(sizeof *fmr, GFP_KERNEL); 276 if (!fmr) 277 return ERR_PTR(-ENOMEM); 278 279 err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc), 280 fmr_attr->max_pages, fmr_attr->max_maps, 281 fmr_attr->page_shift, &fmr->mfmr); 282 if (err) 283 goto err_free; 284 285 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr); 286 if (err) 287 goto err_mr; 288 289 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key; 290 291 return &fmr->ibfmr; 292 293 err_mr: 294 mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr); 295 296 err_free: 297 kfree(fmr); 298 299 return ERR_PTR(err); 300 } 301 302 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, 303 int npages, u64 iova) 304 { 305 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 306 struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device); 307 308 return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova, 309 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 310 } 311 312 int mlx4_ib_unmap_fmr(struct list_head *fmr_list) 313 { 314 struct ib_fmr *ibfmr; 315 int err; 316 struct mlx4_dev *mdev = NULL; 317 318 list_for_each_entry(ibfmr, fmr_list, list) { 319 if (mdev && to_mdev(ibfmr->device)->dev != mdev) 320 return -EINVAL; 321 mdev = to_mdev(ibfmr->device)->dev; 322 } 323 324 if (!mdev) 325 return 0; 326 327 list_for_each_entry(ibfmr, fmr_list, list) { 328 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 329 330 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 331 } 332 333 /* 334 * Make sure all MPT status updates are visible before issuing 335 * SYNC_TPT firmware command. 336 */ 337 wmb(); 338 339 err = mlx4_SYNC_TPT(mdev); 340 if (err) 341 pr_warn("SYNC_TPT error %d when " 342 "unmapping FMRs\n", err); 343 344 return 0; 345 } 346 347 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr) 348 { 349 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 350 struct mlx4_ib_dev *dev = to_mdev(ibfmr->device); 351 int err; 352 353 err = mlx4_fmr_free(dev->dev, &ifmr->mfmr); 354 355 if (!err) 356 kfree(ifmr); 357 358 return err; 359 } 360