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 (acc & IB_ACCESS_MW_BIND ? MLX4_PERM_BIND_MW : 0) | 45 MLX4_PERM_LOCAL_READ; 46 } 47 48 static enum mlx4_mw_type to_mlx4_type(enum ib_mw_type type) 49 { 50 switch (type) { 51 case IB_MW_TYPE_1: return MLX4_MW_TYPE_1; 52 case IB_MW_TYPE_2: return MLX4_MW_TYPE_2; 53 default: return -1; 54 } 55 } 56 57 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) 58 { 59 struct mlx4_ib_mr *mr; 60 int err; 61 62 mr = kmalloc(sizeof *mr, GFP_KERNEL); 63 if (!mr) 64 return ERR_PTR(-ENOMEM); 65 66 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, 67 ~0ull, convert_access(acc), 0, 0, &mr->mmr); 68 if (err) 69 goto err_free; 70 71 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); 72 if (err) 73 goto err_mr; 74 75 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 76 mr->umem = NULL; 77 78 return &mr->ibmr; 79 80 err_mr: 81 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 82 83 err_free: 84 kfree(mr); 85 86 return ERR_PTR(err); 87 } 88 89 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, 90 struct ib_umem *umem) 91 { 92 u64 *pages; 93 struct ib_umem_chunk *chunk; 94 int i, j, k; 95 int n; 96 int len; 97 int err = 0; 98 99 pages = (u64 *) __get_free_page(GFP_KERNEL); 100 if (!pages) 101 return -ENOMEM; 102 103 i = n = 0; 104 105 list_for_each_entry(chunk, &umem->chunk_list, list) 106 for (j = 0; j < chunk->nmap; ++j) { 107 len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; 108 for (k = 0; k < len; ++k) { 109 pages[i++] = sg_dma_address(&chunk->page_list[j]) + 110 umem->page_size * k; 111 /* 112 * Be friendly to mlx4_write_mtt() and 113 * pass it chunks of appropriate size. 114 */ 115 if (i == PAGE_SIZE / sizeof (u64)) { 116 err = mlx4_write_mtt(dev->dev, mtt, n, 117 i, pages); 118 if (err) 119 goto out; 120 n += i; 121 i = 0; 122 } 123 } 124 } 125 126 if (i) 127 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); 128 129 out: 130 free_page((unsigned long) pages); 131 return err; 132 } 133 134 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 135 u64 virt_addr, int access_flags, 136 struct ib_udata *udata) 137 { 138 struct mlx4_ib_dev *dev = to_mdev(pd->device); 139 struct mlx4_ib_mr *mr; 140 int shift; 141 int err; 142 int n; 143 144 mr = kmalloc(sizeof *mr, GFP_KERNEL); 145 if (!mr) 146 return ERR_PTR(-ENOMEM); 147 148 mr->umem = ib_umem_get(pd->uobject->context, start, length, 149 access_flags, 0); 150 if (IS_ERR(mr->umem)) { 151 err = PTR_ERR(mr->umem); 152 goto err_free; 153 } 154 155 n = ib_umem_page_count(mr->umem); 156 shift = ilog2(mr->umem->page_size); 157 158 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, 159 convert_access(access_flags), n, shift, &mr->mmr); 160 if (err) 161 goto err_umem; 162 163 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); 164 if (err) 165 goto err_mr; 166 167 err = mlx4_mr_enable(dev->dev, &mr->mmr); 168 if (err) 169 goto err_mr; 170 171 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 172 173 return &mr->ibmr; 174 175 err_mr: 176 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 177 178 err_umem: 179 ib_umem_release(mr->umem); 180 181 err_free: 182 kfree(mr); 183 184 return ERR_PTR(err); 185 } 186 187 int mlx4_ib_dereg_mr(struct ib_mr *ibmr) 188 { 189 struct mlx4_ib_mr *mr = to_mmr(ibmr); 190 int ret; 191 192 ret = mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); 193 if (ret) 194 return ret; 195 if (mr->umem) 196 ib_umem_release(mr->umem); 197 kfree(mr); 198 199 return 0; 200 } 201 202 struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) 203 { 204 struct mlx4_ib_dev *dev = to_mdev(pd->device); 205 struct mlx4_ib_mw *mw; 206 int err; 207 208 mw = kmalloc(sizeof(*mw), GFP_KERNEL); 209 if (!mw) 210 return ERR_PTR(-ENOMEM); 211 212 err = mlx4_mw_alloc(dev->dev, to_mpd(pd)->pdn, 213 to_mlx4_type(type), &mw->mmw); 214 if (err) 215 goto err_free; 216 217 err = mlx4_mw_enable(dev->dev, &mw->mmw); 218 if (err) 219 goto err_mw; 220 221 mw->ibmw.rkey = mw->mmw.key; 222 223 return &mw->ibmw; 224 225 err_mw: 226 mlx4_mw_free(dev->dev, &mw->mmw); 227 228 err_free: 229 kfree(mw); 230 231 return ERR_PTR(err); 232 } 233 234 int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw, 235 struct ib_mw_bind *mw_bind) 236 { 237 struct ib_send_wr wr; 238 struct ib_send_wr *bad_wr; 239 int ret; 240 241 memset(&wr, 0, sizeof(wr)); 242 wr.opcode = IB_WR_BIND_MW; 243 wr.wr_id = mw_bind->wr_id; 244 wr.send_flags = mw_bind->send_flags; 245 wr.wr.bind_mw.mw = mw; 246 wr.wr.bind_mw.bind_info = mw_bind->bind_info; 247 wr.wr.bind_mw.rkey = ib_inc_rkey(mw->rkey); 248 249 ret = mlx4_ib_post_send(qp, &wr, &bad_wr); 250 if (!ret) 251 mw->rkey = wr.wr.bind_mw.rkey; 252 253 return ret; 254 } 255 256 int mlx4_ib_dealloc_mw(struct ib_mw *ibmw) 257 { 258 struct mlx4_ib_mw *mw = to_mmw(ibmw); 259 260 mlx4_mw_free(to_mdev(ibmw->device)->dev, &mw->mmw); 261 kfree(mw); 262 263 return 0; 264 } 265 266 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd, 267 int max_page_list_len) 268 { 269 struct mlx4_ib_dev *dev = to_mdev(pd->device); 270 struct mlx4_ib_mr *mr; 271 int err; 272 273 mr = kmalloc(sizeof *mr, GFP_KERNEL); 274 if (!mr) 275 return ERR_PTR(-ENOMEM); 276 277 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0, 278 max_page_list_len, 0, &mr->mmr); 279 if (err) 280 goto err_free; 281 282 err = mlx4_mr_enable(dev->dev, &mr->mmr); 283 if (err) 284 goto err_mr; 285 286 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 287 mr->umem = NULL; 288 289 return &mr->ibmr; 290 291 err_mr: 292 (void) mlx4_mr_free(dev->dev, &mr->mmr); 293 294 err_free: 295 kfree(mr); 296 return ERR_PTR(err); 297 } 298 299 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, 300 int page_list_len) 301 { 302 struct mlx4_ib_dev *dev = to_mdev(ibdev); 303 struct mlx4_ib_fast_reg_page_list *mfrpl; 304 int size = page_list_len * sizeof (u64); 305 306 if (page_list_len > MLX4_MAX_FAST_REG_PAGES) 307 return ERR_PTR(-EINVAL); 308 309 mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL); 310 if (!mfrpl) 311 return ERR_PTR(-ENOMEM); 312 313 mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL); 314 if (!mfrpl->ibfrpl.page_list) 315 goto err_free; 316 317 mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev, 318 size, &mfrpl->map, 319 GFP_KERNEL); 320 if (!mfrpl->mapped_page_list) 321 goto err_free; 322 323 WARN_ON(mfrpl->map & 0x3f); 324 325 return &mfrpl->ibfrpl; 326 327 err_free: 328 kfree(mfrpl->ibfrpl.page_list); 329 kfree(mfrpl); 330 return ERR_PTR(-ENOMEM); 331 } 332 333 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) 334 { 335 struct mlx4_ib_dev *dev = to_mdev(page_list->device); 336 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list); 337 int size = page_list->max_page_list_len * sizeof (u64); 338 339 dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list, 340 mfrpl->map); 341 kfree(mfrpl->ibfrpl.page_list); 342 kfree(mfrpl); 343 } 344 345 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc, 346 struct ib_fmr_attr *fmr_attr) 347 { 348 struct mlx4_ib_dev *dev = to_mdev(pd->device); 349 struct mlx4_ib_fmr *fmr; 350 int err = -ENOMEM; 351 352 fmr = kmalloc(sizeof *fmr, GFP_KERNEL); 353 if (!fmr) 354 return ERR_PTR(-ENOMEM); 355 356 err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc), 357 fmr_attr->max_pages, fmr_attr->max_maps, 358 fmr_attr->page_shift, &fmr->mfmr); 359 if (err) 360 goto err_free; 361 362 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr); 363 if (err) 364 goto err_mr; 365 366 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key; 367 368 return &fmr->ibfmr; 369 370 err_mr: 371 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr); 372 373 err_free: 374 kfree(fmr); 375 376 return ERR_PTR(err); 377 } 378 379 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, 380 int npages, u64 iova) 381 { 382 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 383 struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device); 384 385 return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova, 386 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 387 } 388 389 int mlx4_ib_unmap_fmr(struct list_head *fmr_list) 390 { 391 struct ib_fmr *ibfmr; 392 int err; 393 struct mlx4_dev *mdev = NULL; 394 395 list_for_each_entry(ibfmr, fmr_list, list) { 396 if (mdev && to_mdev(ibfmr->device)->dev != mdev) 397 return -EINVAL; 398 mdev = to_mdev(ibfmr->device)->dev; 399 } 400 401 if (!mdev) 402 return 0; 403 404 list_for_each_entry(ibfmr, fmr_list, list) { 405 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 406 407 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 408 } 409 410 /* 411 * Make sure all MPT status updates are visible before issuing 412 * SYNC_TPT firmware command. 413 */ 414 wmb(); 415 416 err = mlx4_SYNC_TPT(mdev); 417 if (err) 418 pr_warn("SYNC_TPT error %d when " 419 "unmapping FMRs\n", err); 420 421 return 0; 422 } 423 424 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr) 425 { 426 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 427 struct mlx4_ib_dev *dev = to_mdev(ibfmr->device); 428 int err; 429 430 err = mlx4_fmr_free(dev->dev, &ifmr->mfmr); 431 432 if (!err) 433 kfree(ifmr); 434 435 return err; 436 } 437