1 /* 2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include <linux/module.h> 34 #include <linux/moduleparam.h> 35 #include <rdma/ib_umem.h> 36 #include <linux/atomic.h> 37 38 #include "iw_cxgb4.h" 39 40 int use_dsgl = 0; 41 module_param(use_dsgl, int, 0644); 42 MODULE_PARM_DESC(use_dsgl, "Use DSGL for PBL/FastReg (default=0)"); 43 44 #define T4_ULPTX_MIN_IO 32 45 #define C4IW_MAX_INLINE_SIZE 96 46 #define T4_ULPTX_MAX_DMA 1024 47 #define C4IW_INLINE_THRESHOLD 128 48 49 static int inline_threshold = C4IW_INLINE_THRESHOLD; 50 module_param(inline_threshold, int, 0644); 51 MODULE_PARM_DESC(inline_threshold, "inline vs dsgl threshold (default=128)"); 52 53 static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr, 54 u32 len, dma_addr_t data, int wait) 55 { 56 struct sk_buff *skb; 57 struct ulp_mem_io *req; 58 struct ulptx_sgl *sgl; 59 u8 wr_len; 60 int ret = 0; 61 struct c4iw_wr_wait wr_wait; 62 63 addr &= 0x7FFFFFF; 64 65 if (wait) 66 c4iw_init_wr_wait(&wr_wait); 67 wr_len = roundup(sizeof(*req) + sizeof(*sgl), 16); 68 69 skb = alloc_skb(wr_len, GFP_KERNEL | __GFP_NOFAIL); 70 if (!skb) 71 return -ENOMEM; 72 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 73 74 req = (struct ulp_mem_io *)__skb_put(skb, wr_len); 75 memset(req, 0, wr_len); 76 INIT_ULPTX_WR(req, wr_len, 0, 0); 77 req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR) | 78 (wait ? FW_WR_COMPL(1) : 0)); 79 req->wr.wr_lo = wait ? (__force __be64)(unsigned long) &wr_wait : 0L; 80 req->wr.wr_mid = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(wr_len, 16))); 81 req->cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE)); 82 req->cmd |= cpu_to_be32(V_T5_ULP_MEMIO_ORDER(1)); 83 req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN(len>>5)); 84 req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr), 16)); 85 req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR(addr)); 86 87 sgl = (struct ulptx_sgl *)(req + 1); 88 sgl->cmd_nsge = cpu_to_be32(ULPTX_CMD(ULP_TX_SC_DSGL) | 89 ULPTX_NSGE(1)); 90 sgl->len0 = cpu_to_be32(len); 91 sgl->addr0 = cpu_to_be64(data); 92 93 ret = c4iw_ofld_send(rdev, skb); 94 if (ret) 95 return ret; 96 if (wait) 97 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); 98 return ret; 99 } 100 101 static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len, 102 void *data) 103 { 104 struct sk_buff *skb; 105 struct ulp_mem_io *req; 106 struct ulptx_idata *sc; 107 u8 wr_len, *to_dp, *from_dp; 108 int copy_len, num_wqe, i, ret = 0; 109 struct c4iw_wr_wait wr_wait; 110 __be32 cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE)); 111 112 if (is_t4(rdev->lldi.adapter_type)) 113 cmd |= cpu_to_be32(ULP_MEMIO_ORDER(1)); 114 else 115 cmd |= cpu_to_be32(V_T5_ULP_MEMIO_IMM(1)); 116 117 addr &= 0x7FFFFFF; 118 PDBG("%s addr 0x%x len %u\n", __func__, addr, len); 119 num_wqe = DIV_ROUND_UP(len, C4IW_MAX_INLINE_SIZE); 120 c4iw_init_wr_wait(&wr_wait); 121 for (i = 0; i < num_wqe; i++) { 122 123 copy_len = len > C4IW_MAX_INLINE_SIZE ? C4IW_MAX_INLINE_SIZE : 124 len; 125 wr_len = roundup(sizeof *req + sizeof *sc + 126 roundup(copy_len, T4_ULPTX_MIN_IO), 16); 127 128 skb = alloc_skb(wr_len, GFP_KERNEL); 129 if (!skb) 130 return -ENOMEM; 131 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 132 133 req = (struct ulp_mem_io *)__skb_put(skb, wr_len); 134 memset(req, 0, wr_len); 135 INIT_ULPTX_WR(req, wr_len, 0, 0); 136 137 if (i == (num_wqe-1)) { 138 req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR) | 139 FW_WR_COMPL(1)); 140 req->wr.wr_lo = (__force __be64)(unsigned long) &wr_wait; 141 } else 142 req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR)); 143 req->wr.wr_mid = cpu_to_be32( 144 FW_WR_LEN16(DIV_ROUND_UP(wr_len, 16))); 145 146 req->cmd = cmd; 147 req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN( 148 DIV_ROUND_UP(copy_len, T4_ULPTX_MIN_IO))); 149 req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr), 150 16)); 151 req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR(addr + i * 3)); 152 153 sc = (struct ulptx_idata *)(req + 1); 154 sc->cmd_more = cpu_to_be32(ULPTX_CMD(ULP_TX_SC_IMM)); 155 sc->len = cpu_to_be32(roundup(copy_len, T4_ULPTX_MIN_IO)); 156 157 to_dp = (u8 *)(sc + 1); 158 from_dp = (u8 *)data + i * C4IW_MAX_INLINE_SIZE; 159 if (data) 160 memcpy(to_dp, from_dp, copy_len); 161 else 162 memset(to_dp, 0, copy_len); 163 if (copy_len % T4_ULPTX_MIN_IO) 164 memset(to_dp + copy_len, 0, T4_ULPTX_MIN_IO - 165 (copy_len % T4_ULPTX_MIN_IO)); 166 ret = c4iw_ofld_send(rdev, skb); 167 if (ret) 168 return ret; 169 len -= C4IW_MAX_INLINE_SIZE; 170 } 171 172 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); 173 return ret; 174 } 175 176 static int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len, void *data) 177 { 178 u32 remain = len; 179 u32 dmalen; 180 int ret = 0; 181 dma_addr_t daddr; 182 dma_addr_t save; 183 184 daddr = dma_map_single(&rdev->lldi.pdev->dev, data, len, DMA_TO_DEVICE); 185 if (dma_mapping_error(&rdev->lldi.pdev->dev, daddr)) 186 return -1; 187 save = daddr; 188 189 while (remain > inline_threshold) { 190 if (remain < T4_ULPTX_MAX_DMA) { 191 if (remain & ~T4_ULPTX_MIN_IO) 192 dmalen = remain & ~(T4_ULPTX_MIN_IO-1); 193 else 194 dmalen = remain; 195 } else 196 dmalen = T4_ULPTX_MAX_DMA; 197 remain -= dmalen; 198 ret = _c4iw_write_mem_dma_aligned(rdev, addr, dmalen, daddr, 199 !remain); 200 if (ret) 201 goto out; 202 addr += dmalen >> 5; 203 data += dmalen; 204 daddr += dmalen; 205 } 206 if (remain) 207 ret = _c4iw_write_mem_inline(rdev, addr, remain, data); 208 out: 209 dma_unmap_single(&rdev->lldi.pdev->dev, save, len, DMA_TO_DEVICE); 210 return ret; 211 } 212 213 /* 214 * write len bytes of data into addr (32B aligned address) 215 * If data is NULL, clear len byte of memory to zero. 216 */ 217 static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len, 218 void *data) 219 { 220 if (is_t5(rdev->lldi.adapter_type) && use_dsgl) { 221 if (len > inline_threshold) { 222 if (_c4iw_write_mem_dma(rdev, addr, len, data)) { 223 printk_ratelimited(KERN_WARNING 224 "%s: dma map" 225 " failure (non fatal)\n", 226 pci_name(rdev->lldi.pdev)); 227 return _c4iw_write_mem_inline(rdev, addr, len, 228 data); 229 } else 230 return 0; 231 } else 232 return _c4iw_write_mem_inline(rdev, addr, len, data); 233 } else 234 return _c4iw_write_mem_inline(rdev, addr, len, data); 235 } 236 237 /* 238 * Build and write a TPT entry. 239 * IN: stag key, pdid, perm, bind_enabled, zbva, to, len, page_size, 240 * pbl_size and pbl_addr 241 * OUT: stag index 242 */ 243 static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry, 244 u32 *stag, u8 stag_state, u32 pdid, 245 enum fw_ri_stag_type type, enum fw_ri_mem_perms perm, 246 int bind_enabled, u32 zbva, u64 to, 247 u64 len, u8 page_size, u32 pbl_size, u32 pbl_addr) 248 { 249 int err; 250 struct fw_ri_tpte tpt; 251 u32 stag_idx; 252 static atomic_t key; 253 254 if (c4iw_fatal_error(rdev)) 255 return -EIO; 256 257 stag_state = stag_state > 0; 258 stag_idx = (*stag) >> 8; 259 260 if ((!reset_tpt_entry) && (*stag == T4_STAG_UNSET)) { 261 stag_idx = c4iw_get_resource(&rdev->resource.tpt_table); 262 if (!stag_idx) { 263 mutex_lock(&rdev->stats.lock); 264 rdev->stats.stag.fail++; 265 mutex_unlock(&rdev->stats.lock); 266 return -ENOMEM; 267 } 268 mutex_lock(&rdev->stats.lock); 269 rdev->stats.stag.cur += 32; 270 if (rdev->stats.stag.cur > rdev->stats.stag.max) 271 rdev->stats.stag.max = rdev->stats.stag.cur; 272 mutex_unlock(&rdev->stats.lock); 273 *stag = (stag_idx << 8) | (atomic_inc_return(&key) & 0xff); 274 } 275 PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n", 276 __func__, stag_state, type, pdid, stag_idx); 277 278 /* write TPT entry */ 279 if (reset_tpt_entry) 280 memset(&tpt, 0, sizeof(tpt)); 281 else { 282 tpt.valid_to_pdid = cpu_to_be32(F_FW_RI_TPTE_VALID | 283 V_FW_RI_TPTE_STAGKEY((*stag & M_FW_RI_TPTE_STAGKEY)) | 284 V_FW_RI_TPTE_STAGSTATE(stag_state) | 285 V_FW_RI_TPTE_STAGTYPE(type) | V_FW_RI_TPTE_PDID(pdid)); 286 tpt.locread_to_qpid = cpu_to_be32(V_FW_RI_TPTE_PERM(perm) | 287 (bind_enabled ? F_FW_RI_TPTE_MWBINDEN : 0) | 288 V_FW_RI_TPTE_ADDRTYPE((zbva ? FW_RI_ZERO_BASED_TO : 289 FW_RI_VA_BASED_TO))| 290 V_FW_RI_TPTE_PS(page_size)); 291 tpt.nosnoop_pbladdr = !pbl_size ? 0 : cpu_to_be32( 292 V_FW_RI_TPTE_PBLADDR(PBL_OFF(rdev, pbl_addr)>>3)); 293 tpt.len_lo = cpu_to_be32((u32)(len & 0xffffffffUL)); 294 tpt.va_hi = cpu_to_be32((u32)(to >> 32)); 295 tpt.va_lo_fbo = cpu_to_be32((u32)(to & 0xffffffffUL)); 296 tpt.dca_mwbcnt_pstag = cpu_to_be32(0); 297 tpt.len_hi = cpu_to_be32((u32)(len >> 32)); 298 } 299 err = write_adapter_mem(rdev, stag_idx + 300 (rdev->lldi.vr->stag.start >> 5), 301 sizeof(tpt), &tpt); 302 303 if (reset_tpt_entry) { 304 c4iw_put_resource(&rdev->resource.tpt_table, stag_idx); 305 mutex_lock(&rdev->stats.lock); 306 rdev->stats.stag.cur -= 32; 307 mutex_unlock(&rdev->stats.lock); 308 } 309 return err; 310 } 311 312 static int write_pbl(struct c4iw_rdev *rdev, __be64 *pbl, 313 u32 pbl_addr, u32 pbl_size) 314 { 315 int err; 316 317 PDBG("%s *pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n", 318 __func__, pbl_addr, rdev->lldi.vr->pbl.start, 319 pbl_size); 320 321 err = write_adapter_mem(rdev, pbl_addr >> 5, pbl_size << 3, pbl); 322 return err; 323 } 324 325 static int dereg_mem(struct c4iw_rdev *rdev, u32 stag, u32 pbl_size, 326 u32 pbl_addr) 327 { 328 return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0, 329 pbl_size, pbl_addr); 330 } 331 332 static int allocate_window(struct c4iw_rdev *rdev, u32 * stag, u32 pdid) 333 { 334 *stag = T4_STAG_UNSET; 335 return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_MW, 0, 0, 0, 336 0UL, 0, 0, 0, 0); 337 } 338 339 static int deallocate_window(struct c4iw_rdev *rdev, u32 stag) 340 { 341 return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0, 0, 342 0); 343 } 344 345 static int allocate_stag(struct c4iw_rdev *rdev, u32 *stag, u32 pdid, 346 u32 pbl_size, u32 pbl_addr) 347 { 348 *stag = T4_STAG_UNSET; 349 return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_NSMR, 0, 0, 0, 350 0UL, 0, 0, pbl_size, pbl_addr); 351 } 352 353 static int finish_mem_reg(struct c4iw_mr *mhp, u32 stag) 354 { 355 u32 mmid; 356 357 mhp->attr.state = 1; 358 mhp->attr.stag = stag; 359 mmid = stag >> 8; 360 mhp->ibmr.rkey = mhp->ibmr.lkey = stag; 361 PDBG("%s mmid 0x%x mhp %p\n", __func__, mmid, mhp); 362 return insert_handle(mhp->rhp, &mhp->rhp->mmidr, mhp, mmid); 363 } 364 365 static int register_mem(struct c4iw_dev *rhp, struct c4iw_pd *php, 366 struct c4iw_mr *mhp, int shift) 367 { 368 u32 stag = T4_STAG_UNSET; 369 int ret; 370 371 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid, 372 FW_RI_STAG_NSMR, mhp->attr.perms, 373 mhp->attr.mw_bind_enable, mhp->attr.zbva, 374 mhp->attr.va_fbo, mhp->attr.len, shift - 12, 375 mhp->attr.pbl_size, mhp->attr.pbl_addr); 376 if (ret) 377 return ret; 378 379 ret = finish_mem_reg(mhp, stag); 380 if (ret) 381 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, 382 mhp->attr.pbl_addr); 383 return ret; 384 } 385 386 static int reregister_mem(struct c4iw_dev *rhp, struct c4iw_pd *php, 387 struct c4iw_mr *mhp, int shift, int npages) 388 { 389 u32 stag; 390 int ret; 391 392 if (npages > mhp->attr.pbl_size) 393 return -ENOMEM; 394 395 stag = mhp->attr.stag; 396 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid, 397 FW_RI_STAG_NSMR, mhp->attr.perms, 398 mhp->attr.mw_bind_enable, mhp->attr.zbva, 399 mhp->attr.va_fbo, mhp->attr.len, shift - 12, 400 mhp->attr.pbl_size, mhp->attr.pbl_addr); 401 if (ret) 402 return ret; 403 404 ret = finish_mem_reg(mhp, stag); 405 if (ret) 406 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, 407 mhp->attr.pbl_addr); 408 409 return ret; 410 } 411 412 static int alloc_pbl(struct c4iw_mr *mhp, int npages) 413 { 414 mhp->attr.pbl_addr = c4iw_pblpool_alloc(&mhp->rhp->rdev, 415 npages << 3); 416 417 if (!mhp->attr.pbl_addr) 418 return -ENOMEM; 419 420 mhp->attr.pbl_size = npages; 421 422 return 0; 423 } 424 425 static int build_phys_page_list(struct ib_phys_buf *buffer_list, 426 int num_phys_buf, u64 *iova_start, 427 u64 *total_size, int *npages, 428 int *shift, __be64 **page_list) 429 { 430 u64 mask; 431 int i, j, n; 432 433 mask = 0; 434 *total_size = 0; 435 for (i = 0; i < num_phys_buf; ++i) { 436 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK) 437 return -EINVAL; 438 if (i != 0 && i != num_phys_buf - 1 && 439 (buffer_list[i].size & ~PAGE_MASK)) 440 return -EINVAL; 441 *total_size += buffer_list[i].size; 442 if (i > 0) 443 mask |= buffer_list[i].addr; 444 else 445 mask |= buffer_list[i].addr & PAGE_MASK; 446 if (i != num_phys_buf - 1) 447 mask |= buffer_list[i].addr + buffer_list[i].size; 448 else 449 mask |= (buffer_list[i].addr + buffer_list[i].size + 450 PAGE_SIZE - 1) & PAGE_MASK; 451 } 452 453 if (*total_size > 0xFFFFFFFFULL) 454 return -ENOMEM; 455 456 /* Find largest page shift we can use to cover buffers */ 457 for (*shift = PAGE_SHIFT; *shift < 27; ++(*shift)) 458 if ((1ULL << *shift) & mask) 459 break; 460 461 buffer_list[0].size += buffer_list[0].addr & ((1ULL << *shift) - 1); 462 buffer_list[0].addr &= ~0ull << *shift; 463 464 *npages = 0; 465 for (i = 0; i < num_phys_buf; ++i) 466 *npages += (buffer_list[i].size + 467 (1ULL << *shift) - 1) >> *shift; 468 469 if (!*npages) 470 return -EINVAL; 471 472 *page_list = kmalloc(sizeof(u64) * *npages, GFP_KERNEL); 473 if (!*page_list) 474 return -ENOMEM; 475 476 n = 0; 477 for (i = 0; i < num_phys_buf; ++i) 478 for (j = 0; 479 j < (buffer_list[i].size + (1ULL << *shift) - 1) >> *shift; 480 ++j) 481 (*page_list)[n++] = cpu_to_be64(buffer_list[i].addr + 482 ((u64) j << *shift)); 483 484 PDBG("%s va 0x%llx mask 0x%llx shift %d len %lld pbl_size %d\n", 485 __func__, (unsigned long long)*iova_start, 486 (unsigned long long)mask, *shift, (unsigned long long)*total_size, 487 *npages); 488 489 return 0; 490 491 } 492 493 int c4iw_reregister_phys_mem(struct ib_mr *mr, int mr_rereg_mask, 494 struct ib_pd *pd, struct ib_phys_buf *buffer_list, 495 int num_phys_buf, int acc, u64 *iova_start) 496 { 497 498 struct c4iw_mr mh, *mhp; 499 struct c4iw_pd *php; 500 struct c4iw_dev *rhp; 501 __be64 *page_list = NULL; 502 int shift = 0; 503 u64 total_size; 504 int npages; 505 int ret; 506 507 PDBG("%s ib_mr %p ib_pd %p\n", __func__, mr, pd); 508 509 /* There can be no memory windows */ 510 if (atomic_read(&mr->usecnt)) 511 return -EINVAL; 512 513 mhp = to_c4iw_mr(mr); 514 rhp = mhp->rhp; 515 php = to_c4iw_pd(mr->pd); 516 517 /* make sure we are on the same adapter */ 518 if (rhp != php->rhp) 519 return -EINVAL; 520 521 memcpy(&mh, mhp, sizeof *mhp); 522 523 if (mr_rereg_mask & IB_MR_REREG_PD) 524 php = to_c4iw_pd(pd); 525 if (mr_rereg_mask & IB_MR_REREG_ACCESS) { 526 mh.attr.perms = c4iw_ib_to_tpt_access(acc); 527 mh.attr.mw_bind_enable = (acc & IB_ACCESS_MW_BIND) == 528 IB_ACCESS_MW_BIND; 529 } 530 if (mr_rereg_mask & IB_MR_REREG_TRANS) { 531 ret = build_phys_page_list(buffer_list, num_phys_buf, 532 iova_start, 533 &total_size, &npages, 534 &shift, &page_list); 535 if (ret) 536 return ret; 537 } 538 539 ret = reregister_mem(rhp, php, &mh, shift, npages); 540 kfree(page_list); 541 if (ret) 542 return ret; 543 if (mr_rereg_mask & IB_MR_REREG_PD) 544 mhp->attr.pdid = php->pdid; 545 if (mr_rereg_mask & IB_MR_REREG_ACCESS) 546 mhp->attr.perms = c4iw_ib_to_tpt_access(acc); 547 if (mr_rereg_mask & IB_MR_REREG_TRANS) { 548 mhp->attr.zbva = 0; 549 mhp->attr.va_fbo = *iova_start; 550 mhp->attr.page_size = shift - 12; 551 mhp->attr.len = (u32) total_size; 552 mhp->attr.pbl_size = npages; 553 } 554 555 return 0; 556 } 557 558 struct ib_mr *c4iw_register_phys_mem(struct ib_pd *pd, 559 struct ib_phys_buf *buffer_list, 560 int num_phys_buf, int acc, u64 *iova_start) 561 { 562 __be64 *page_list; 563 int shift; 564 u64 total_size; 565 int npages; 566 struct c4iw_dev *rhp; 567 struct c4iw_pd *php; 568 struct c4iw_mr *mhp; 569 int ret; 570 571 PDBG("%s ib_pd %p\n", __func__, pd); 572 php = to_c4iw_pd(pd); 573 rhp = php->rhp; 574 575 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); 576 if (!mhp) 577 return ERR_PTR(-ENOMEM); 578 579 mhp->rhp = rhp; 580 581 /* First check that we have enough alignment */ 582 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) { 583 ret = -EINVAL; 584 goto err; 585 } 586 587 if (num_phys_buf > 1 && 588 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) { 589 ret = -EINVAL; 590 goto err; 591 } 592 593 ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start, 594 &total_size, &npages, &shift, 595 &page_list); 596 if (ret) 597 goto err; 598 599 ret = alloc_pbl(mhp, npages); 600 if (ret) { 601 kfree(page_list); 602 goto err; 603 } 604 605 ret = write_pbl(&mhp->rhp->rdev, page_list, mhp->attr.pbl_addr, 606 npages); 607 kfree(page_list); 608 if (ret) 609 goto err_pbl; 610 611 mhp->attr.pdid = php->pdid; 612 mhp->attr.zbva = 0; 613 614 mhp->attr.perms = c4iw_ib_to_tpt_access(acc); 615 mhp->attr.va_fbo = *iova_start; 616 mhp->attr.page_size = shift - 12; 617 618 mhp->attr.len = (u32) total_size; 619 mhp->attr.pbl_size = npages; 620 ret = register_mem(rhp, php, mhp, shift); 621 if (ret) 622 goto err_pbl; 623 624 return &mhp->ibmr; 625 626 err_pbl: 627 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, 628 mhp->attr.pbl_size << 3); 629 630 err: 631 kfree(mhp); 632 return ERR_PTR(ret); 633 634 } 635 636 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc) 637 { 638 struct c4iw_dev *rhp; 639 struct c4iw_pd *php; 640 struct c4iw_mr *mhp; 641 int ret; 642 u32 stag = T4_STAG_UNSET; 643 644 PDBG("%s ib_pd %p\n", __func__, pd); 645 php = to_c4iw_pd(pd); 646 rhp = php->rhp; 647 648 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); 649 if (!mhp) 650 return ERR_PTR(-ENOMEM); 651 652 mhp->rhp = rhp; 653 mhp->attr.pdid = php->pdid; 654 mhp->attr.perms = c4iw_ib_to_tpt_access(acc); 655 mhp->attr.mw_bind_enable = (acc&IB_ACCESS_MW_BIND) == IB_ACCESS_MW_BIND; 656 mhp->attr.zbva = 0; 657 mhp->attr.va_fbo = 0; 658 mhp->attr.page_size = 0; 659 mhp->attr.len = ~0UL; 660 mhp->attr.pbl_size = 0; 661 662 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, php->pdid, 663 FW_RI_STAG_NSMR, mhp->attr.perms, 664 mhp->attr.mw_bind_enable, 0, 0, ~0UL, 0, 0, 0); 665 if (ret) 666 goto err1; 667 668 ret = finish_mem_reg(mhp, stag); 669 if (ret) 670 goto err2; 671 return &mhp->ibmr; 672 err2: 673 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, 674 mhp->attr.pbl_addr); 675 err1: 676 kfree(mhp); 677 return ERR_PTR(ret); 678 } 679 680 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 681 u64 virt, int acc, struct ib_udata *udata) 682 { 683 __be64 *pages; 684 int shift, n, len; 685 int i, k, entry; 686 int err = 0; 687 struct scatterlist *sg; 688 struct c4iw_dev *rhp; 689 struct c4iw_pd *php; 690 struct c4iw_mr *mhp; 691 692 PDBG("%s ib_pd %p\n", __func__, pd); 693 694 if (length == ~0ULL) 695 return ERR_PTR(-EINVAL); 696 697 if ((length + start) < start) 698 return ERR_PTR(-EINVAL); 699 700 php = to_c4iw_pd(pd); 701 rhp = php->rhp; 702 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); 703 if (!mhp) 704 return ERR_PTR(-ENOMEM); 705 706 mhp->rhp = rhp; 707 708 mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0); 709 if (IS_ERR(mhp->umem)) { 710 err = PTR_ERR(mhp->umem); 711 kfree(mhp); 712 return ERR_PTR(err); 713 } 714 715 shift = ffs(mhp->umem->page_size) - 1; 716 717 n = mhp->umem->nmap; 718 err = alloc_pbl(mhp, n); 719 if (err) 720 goto err; 721 722 pages = (__be64 *) __get_free_page(GFP_KERNEL); 723 if (!pages) { 724 err = -ENOMEM; 725 goto err_pbl; 726 } 727 728 i = n = 0; 729 730 for_each_sg(mhp->umem->sg_head.sgl, sg, mhp->umem->nmap, entry) { 731 len = sg_dma_len(sg) >> shift; 732 for (k = 0; k < len; ++k) { 733 pages[i++] = cpu_to_be64(sg_dma_address(sg) + 734 mhp->umem->page_size * k); 735 if (i == PAGE_SIZE / sizeof *pages) { 736 err = write_pbl(&mhp->rhp->rdev, 737 pages, 738 mhp->attr.pbl_addr + (n << 3), i); 739 if (err) 740 goto pbl_done; 741 n += i; 742 i = 0; 743 } 744 } 745 } 746 747 if (i) 748 err = write_pbl(&mhp->rhp->rdev, pages, 749 mhp->attr.pbl_addr + (n << 3), i); 750 751 pbl_done: 752 free_page((unsigned long) pages); 753 if (err) 754 goto err_pbl; 755 756 mhp->attr.pdid = php->pdid; 757 mhp->attr.zbva = 0; 758 mhp->attr.perms = c4iw_ib_to_tpt_access(acc); 759 mhp->attr.va_fbo = virt; 760 mhp->attr.page_size = shift - 12; 761 mhp->attr.len = length; 762 763 err = register_mem(rhp, php, mhp, shift); 764 if (err) 765 goto err_pbl; 766 767 return &mhp->ibmr; 768 769 err_pbl: 770 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, 771 mhp->attr.pbl_size << 3); 772 773 err: 774 ib_umem_release(mhp->umem); 775 kfree(mhp); 776 return ERR_PTR(err); 777 } 778 779 struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) 780 { 781 struct c4iw_dev *rhp; 782 struct c4iw_pd *php; 783 struct c4iw_mw *mhp; 784 u32 mmid; 785 u32 stag = 0; 786 int ret; 787 788 if (type != IB_MW_TYPE_1) 789 return ERR_PTR(-EINVAL); 790 791 php = to_c4iw_pd(pd); 792 rhp = php->rhp; 793 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); 794 if (!mhp) 795 return ERR_PTR(-ENOMEM); 796 ret = allocate_window(&rhp->rdev, &stag, php->pdid); 797 if (ret) { 798 kfree(mhp); 799 return ERR_PTR(ret); 800 } 801 mhp->rhp = rhp; 802 mhp->attr.pdid = php->pdid; 803 mhp->attr.type = FW_RI_STAG_MW; 804 mhp->attr.stag = stag; 805 mmid = (stag) >> 8; 806 mhp->ibmw.rkey = stag; 807 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) { 808 deallocate_window(&rhp->rdev, mhp->attr.stag); 809 kfree(mhp); 810 return ERR_PTR(-ENOMEM); 811 } 812 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag); 813 return &(mhp->ibmw); 814 } 815 816 int c4iw_dealloc_mw(struct ib_mw *mw) 817 { 818 struct c4iw_dev *rhp; 819 struct c4iw_mw *mhp; 820 u32 mmid; 821 822 mhp = to_c4iw_mw(mw); 823 rhp = mhp->rhp; 824 mmid = (mw->rkey) >> 8; 825 remove_handle(rhp, &rhp->mmidr, mmid); 826 deallocate_window(&rhp->rdev, mhp->attr.stag); 827 kfree(mhp); 828 PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __func__, mw, mmid, mhp); 829 return 0; 830 } 831 832 struct ib_mr *c4iw_alloc_fast_reg_mr(struct ib_pd *pd, int pbl_depth) 833 { 834 struct c4iw_dev *rhp; 835 struct c4iw_pd *php; 836 struct c4iw_mr *mhp; 837 u32 mmid; 838 u32 stag = 0; 839 int ret = 0; 840 841 php = to_c4iw_pd(pd); 842 rhp = php->rhp; 843 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); 844 if (!mhp) { 845 ret = -ENOMEM; 846 goto err; 847 } 848 849 mhp->rhp = rhp; 850 ret = alloc_pbl(mhp, pbl_depth); 851 if (ret) 852 goto err1; 853 mhp->attr.pbl_size = pbl_depth; 854 ret = allocate_stag(&rhp->rdev, &stag, php->pdid, 855 mhp->attr.pbl_size, mhp->attr.pbl_addr); 856 if (ret) 857 goto err2; 858 mhp->attr.pdid = php->pdid; 859 mhp->attr.type = FW_RI_STAG_NSMR; 860 mhp->attr.stag = stag; 861 mhp->attr.state = 1; 862 mmid = (stag) >> 8; 863 mhp->ibmr.rkey = mhp->ibmr.lkey = stag; 864 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) { 865 ret = -ENOMEM; 866 goto err3; 867 } 868 869 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag); 870 return &(mhp->ibmr); 871 err3: 872 dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size, 873 mhp->attr.pbl_addr); 874 err2: 875 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, 876 mhp->attr.pbl_size << 3); 877 err1: 878 kfree(mhp); 879 err: 880 return ERR_PTR(ret); 881 } 882 883 struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device, 884 int page_list_len) 885 { 886 struct c4iw_fr_page_list *c4pl; 887 struct c4iw_dev *dev = to_c4iw_dev(device); 888 dma_addr_t dma_addr; 889 int pll_len = roundup(page_list_len * sizeof(u64), 32); 890 891 c4pl = kmalloc(sizeof(*c4pl), GFP_KERNEL); 892 if (!c4pl) 893 return ERR_PTR(-ENOMEM); 894 895 c4pl->ibpl.page_list = dma_alloc_coherent(&dev->rdev.lldi.pdev->dev, 896 pll_len, &dma_addr, 897 GFP_KERNEL); 898 if (!c4pl->ibpl.page_list) { 899 kfree(c4pl); 900 return ERR_PTR(-ENOMEM); 901 } 902 dma_unmap_addr_set(c4pl, mapping, dma_addr); 903 c4pl->dma_addr = dma_addr; 904 c4pl->dev = dev; 905 c4pl->pll_len = pll_len; 906 907 PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n", 908 __func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list, 909 &c4pl->dma_addr); 910 911 return &c4pl->ibpl; 912 } 913 914 void c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list *ibpl) 915 { 916 struct c4iw_fr_page_list *c4pl = to_c4iw_fr_page_list(ibpl); 917 918 PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n", 919 __func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list, 920 &c4pl->dma_addr); 921 922 dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev, 923 c4pl->pll_len, 924 c4pl->ibpl.page_list, dma_unmap_addr(c4pl, mapping)); 925 kfree(c4pl); 926 } 927 928 int c4iw_dereg_mr(struct ib_mr *ib_mr) 929 { 930 struct c4iw_dev *rhp; 931 struct c4iw_mr *mhp; 932 u32 mmid; 933 934 PDBG("%s ib_mr %p\n", __func__, ib_mr); 935 /* There can be no memory windows */ 936 if (atomic_read(&ib_mr->usecnt)) 937 return -EINVAL; 938 939 mhp = to_c4iw_mr(ib_mr); 940 rhp = mhp->rhp; 941 mmid = mhp->attr.stag >> 8; 942 remove_handle(rhp, &rhp->mmidr, mmid); 943 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, 944 mhp->attr.pbl_addr); 945 if (mhp->attr.pbl_size) 946 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, 947 mhp->attr.pbl_size << 3); 948 if (mhp->kva) 949 kfree((void *) (unsigned long) mhp->kva); 950 if (mhp->umem) 951 ib_umem_release(mhp->umem); 952 PDBG("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp); 953 kfree(mhp); 954 return 0; 955 } 956