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