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