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 35 #include "iw_cxgb4.h" 36 37 static int db_delay_usecs = 1; 38 module_param(db_delay_usecs, int, 0644); 39 MODULE_PARM_DESC(db_delay_usecs, "Usecs to delay awaiting db fifo to drain"); 40 41 static int ocqp_support = 1; 42 module_param(ocqp_support, int, 0644); 43 MODULE_PARM_DESC(ocqp_support, "Support on-chip SQs (default=1)"); 44 45 int db_fc_threshold = 1000; 46 module_param(db_fc_threshold, int, 0644); 47 MODULE_PARM_DESC(db_fc_threshold, 48 "QP count/threshold that triggers" 49 " automatic db flow control mode (default = 1000)"); 50 51 int db_coalescing_threshold; 52 module_param(db_coalescing_threshold, int, 0644); 53 MODULE_PARM_DESC(db_coalescing_threshold, 54 "QP count/threshold that triggers" 55 " disabling db coalescing (default = 0)"); 56 57 static int max_fr_immd = T4_MAX_FR_IMMD; 58 module_param(max_fr_immd, int, 0644); 59 MODULE_PARM_DESC(max_fr_immd, "fastreg threshold for using DSGL instead of immedate"); 60 61 static int alloc_ird(struct c4iw_dev *dev, u32 ird) 62 { 63 int ret = 0; 64 65 spin_lock_irq(&dev->lock); 66 if (ird <= dev->avail_ird) 67 dev->avail_ird -= ird; 68 else 69 ret = -ENOMEM; 70 spin_unlock_irq(&dev->lock); 71 72 if (ret) 73 dev_warn(&dev->rdev.lldi.pdev->dev, 74 "device IRD resources exhausted\n"); 75 76 return ret; 77 } 78 79 static void free_ird(struct c4iw_dev *dev, int ird) 80 { 81 spin_lock_irq(&dev->lock); 82 dev->avail_ird += ird; 83 spin_unlock_irq(&dev->lock); 84 } 85 86 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) 87 { 88 unsigned long flag; 89 spin_lock_irqsave(&qhp->lock, flag); 90 qhp->attr.state = state; 91 spin_unlock_irqrestore(&qhp->lock, flag); 92 } 93 94 static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 95 { 96 c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize); 97 } 98 99 static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 100 { 101 dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue, 102 pci_unmap_addr(sq, mapping)); 103 } 104 105 static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 106 { 107 if (t4_sq_onchip(sq)) 108 dealloc_oc_sq(rdev, sq); 109 else 110 dealloc_host_sq(rdev, sq); 111 } 112 113 static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 114 { 115 if (!ocqp_support || !ocqp_supported(&rdev->lldi)) 116 return -ENOSYS; 117 sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize); 118 if (!sq->dma_addr) 119 return -ENOMEM; 120 sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr - 121 rdev->lldi.vr->ocq.start; 122 sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr - 123 rdev->lldi.vr->ocq.start); 124 sq->flags |= T4_SQ_ONCHIP; 125 return 0; 126 } 127 128 static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 129 { 130 sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize, 131 &(sq->dma_addr), GFP_KERNEL); 132 if (!sq->queue) 133 return -ENOMEM; 134 sq->phys_addr = virt_to_phys(sq->queue); 135 pci_unmap_addr_set(sq, mapping, sq->dma_addr); 136 return 0; 137 } 138 139 static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user) 140 { 141 int ret = -ENOSYS; 142 if (user) 143 ret = alloc_oc_sq(rdev, sq); 144 if (ret) 145 ret = alloc_host_sq(rdev, sq); 146 return ret; 147 } 148 149 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 150 struct c4iw_dev_ucontext *uctx) 151 { 152 /* 153 * uP clears EQ contexts when the connection exits rdma mode, 154 * so no need to post a RESET WR for these EQs. 155 */ 156 dma_free_coherent(&(rdev->lldi.pdev->dev), 157 wq->rq.memsize, wq->rq.queue, 158 dma_unmap_addr(&wq->rq, mapping)); 159 dealloc_sq(rdev, &wq->sq); 160 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 161 kfree(wq->rq.sw_rq); 162 kfree(wq->sq.sw_sq); 163 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 164 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 165 return 0; 166 } 167 168 /* 169 * Determine the BAR2 virtual address and qid. If pbar2_pa is not NULL, 170 * then this is a user mapping so compute the page-aligned physical address 171 * for mapping. 172 */ 173 void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid, 174 enum cxgb4_bar2_qtype qtype, 175 unsigned int *pbar2_qid, u64 *pbar2_pa) 176 { 177 u64 bar2_qoffset; 178 int ret; 179 180 ret = cxgb4_bar2_sge_qregs(rdev->lldi.ports[0], qid, qtype, 181 pbar2_pa ? 1 : 0, 182 &bar2_qoffset, pbar2_qid); 183 if (ret) 184 return NULL; 185 186 if (pbar2_pa) 187 *pbar2_pa = (rdev->bar2_pa + bar2_qoffset) & PAGE_MASK; 188 return rdev->bar2_kva + bar2_qoffset; 189 } 190 191 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 192 struct t4_cq *rcq, struct t4_cq *scq, 193 struct c4iw_dev_ucontext *uctx) 194 { 195 int user = (uctx != &rdev->uctx); 196 struct fw_ri_res_wr *res_wr; 197 struct fw_ri_res *res; 198 int wr_len; 199 struct c4iw_wr_wait wr_wait; 200 struct sk_buff *skb; 201 int ret = 0; 202 int eqsize; 203 204 wq->sq.qid = c4iw_get_qpid(rdev, uctx); 205 if (!wq->sq.qid) 206 return -ENOMEM; 207 208 wq->rq.qid = c4iw_get_qpid(rdev, uctx); 209 if (!wq->rq.qid) { 210 ret = -ENOMEM; 211 goto free_sq_qid; 212 } 213 214 if (!user) { 215 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq, 216 GFP_KERNEL); 217 if (!wq->sq.sw_sq) { 218 ret = -ENOMEM; 219 goto free_rq_qid; 220 } 221 222 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq, 223 GFP_KERNEL); 224 if (!wq->rq.sw_rq) { 225 ret = -ENOMEM; 226 goto free_sw_sq; 227 } 228 } 229 230 /* 231 * RQT must be a power of 2 and at least 16 deep. 232 */ 233 wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16)); 234 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); 235 if (!wq->rq.rqt_hwaddr) { 236 ret = -ENOMEM; 237 goto free_sw_rq; 238 } 239 240 ret = alloc_sq(rdev, &wq->sq, user); 241 if (ret) 242 goto free_hwaddr; 243 memset(wq->sq.queue, 0, wq->sq.memsize); 244 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); 245 246 wq->rq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), 247 wq->rq.memsize, &(wq->rq.dma_addr), 248 GFP_KERNEL); 249 if (!wq->rq.queue) { 250 ret = -ENOMEM; 251 goto free_sq; 252 } 253 PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n", 254 __func__, wq->sq.queue, 255 (unsigned long long)virt_to_phys(wq->sq.queue), 256 wq->rq.queue, 257 (unsigned long long)virt_to_phys(wq->rq.queue)); 258 memset(wq->rq.queue, 0, wq->rq.memsize); 259 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); 260 261 wq->db = rdev->lldi.db_reg; 262 263 wq->sq.bar2_va = c4iw_bar2_addrs(rdev, wq->sq.qid, T4_BAR2_QTYPE_EGRESS, 264 &wq->sq.bar2_qid, 265 user ? &wq->sq.bar2_pa : NULL); 266 wq->rq.bar2_va = c4iw_bar2_addrs(rdev, wq->rq.qid, T4_BAR2_QTYPE_EGRESS, 267 &wq->rq.bar2_qid, 268 user ? &wq->rq.bar2_pa : NULL); 269 270 /* 271 * User mode must have bar2 access. 272 */ 273 if (user && (!wq->sq.bar2_va || !wq->rq.bar2_va)) { 274 pr_warn(MOD "%s: sqid %u or rqid %u not in BAR2 range.\n", 275 pci_name(rdev->lldi.pdev), wq->sq.qid, wq->rq.qid); 276 goto free_dma; 277 } 278 279 wq->rdev = rdev; 280 wq->rq.msn = 1; 281 282 /* build fw_ri_res_wr */ 283 wr_len = sizeof *res_wr + 2 * sizeof *res; 284 285 skb = alloc_skb(wr_len, GFP_KERNEL); 286 if (!skb) { 287 ret = -ENOMEM; 288 goto free_dma; 289 } 290 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 291 292 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 293 memset(res_wr, 0, wr_len); 294 res_wr->op_nres = cpu_to_be32( 295 FW_WR_OP_V(FW_RI_RES_WR) | 296 FW_RI_RES_WR_NRES_V(2) | 297 FW_WR_COMPL_F); 298 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 299 res_wr->cookie = (uintptr_t)&wr_wait; 300 res = res_wr->res; 301 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 302 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 303 304 /* 305 * eqsize is the number of 64B entries plus the status page size. 306 */ 307 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + 308 rdev->hw_queue.t4_eq_status_entries; 309 310 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 311 FW_RI_RES_WR_HOSTFCMODE_V(0) | /* no host cidx updates */ 312 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 313 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 314 (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_ONCHIP_F : 0) | 315 FW_RI_RES_WR_IQID_V(scq->cqid)); 316 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 317 FW_RI_RES_WR_DCAEN_V(0) | 318 FW_RI_RES_WR_DCACPU_V(0) | 319 FW_RI_RES_WR_FBMIN_V(2) | 320 FW_RI_RES_WR_FBMAX_V(2) | 321 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 322 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 323 FW_RI_RES_WR_EQSIZE_V(eqsize)); 324 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 325 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 326 res++; 327 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 328 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 329 330 /* 331 * eqsize is the number of 64B entries plus the status page size. 332 */ 333 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + 334 rdev->hw_queue.t4_eq_status_entries; 335 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 336 FW_RI_RES_WR_HOSTFCMODE_V(0) | /* no host cidx updates */ 337 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 338 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 339 FW_RI_RES_WR_IQID_V(rcq->cqid)); 340 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 341 FW_RI_RES_WR_DCAEN_V(0) | 342 FW_RI_RES_WR_DCACPU_V(0) | 343 FW_RI_RES_WR_FBMIN_V(2) | 344 FW_RI_RES_WR_FBMAX_V(2) | 345 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 346 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 347 FW_RI_RES_WR_EQSIZE_V(eqsize)); 348 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 349 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 350 351 c4iw_init_wr_wait(&wr_wait); 352 353 ret = c4iw_ofld_send(rdev, skb); 354 if (ret) 355 goto free_dma; 356 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, __func__); 357 if (ret) 358 goto free_dma; 359 360 PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p sq_bar2_addr %p rq_bar2_addr %p\n", 361 __func__, wq->sq.qid, wq->rq.qid, wq->db, 362 wq->sq.bar2_va, wq->rq.bar2_va); 363 364 return 0; 365 free_dma: 366 dma_free_coherent(&(rdev->lldi.pdev->dev), 367 wq->rq.memsize, wq->rq.queue, 368 dma_unmap_addr(&wq->rq, mapping)); 369 free_sq: 370 dealloc_sq(rdev, &wq->sq); 371 free_hwaddr: 372 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 373 free_sw_rq: 374 kfree(wq->rq.sw_rq); 375 free_sw_sq: 376 kfree(wq->sq.sw_sq); 377 free_rq_qid: 378 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 379 free_sq_qid: 380 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 381 return ret; 382 } 383 384 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 385 struct ib_send_wr *wr, int max, u32 *plenp) 386 { 387 u8 *dstp, *srcp; 388 u32 plen = 0; 389 int i; 390 int rem, len; 391 392 dstp = (u8 *)immdp->data; 393 for (i = 0; i < wr->num_sge; i++) { 394 if ((plen + wr->sg_list[i].length) > max) 395 return -EMSGSIZE; 396 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 397 plen += wr->sg_list[i].length; 398 rem = wr->sg_list[i].length; 399 while (rem) { 400 if (dstp == (u8 *)&sq->queue[sq->size]) 401 dstp = (u8 *)sq->queue; 402 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 403 len = rem; 404 else 405 len = (u8 *)&sq->queue[sq->size] - dstp; 406 memcpy(dstp, srcp, len); 407 dstp += len; 408 srcp += len; 409 rem -= len; 410 } 411 } 412 len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp); 413 if (len) 414 memset(dstp, 0, len); 415 immdp->op = FW_RI_DATA_IMMD; 416 immdp->r1 = 0; 417 immdp->r2 = 0; 418 immdp->immdlen = cpu_to_be32(plen); 419 *plenp = plen; 420 return 0; 421 } 422 423 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 424 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 425 int num_sge, u32 *plenp) 426 427 { 428 int i; 429 u32 plen = 0; 430 __be64 *flitp = (__be64 *)isglp->sge; 431 432 for (i = 0; i < num_sge; i++) { 433 if ((plen + sg_list[i].length) < plen) 434 return -EMSGSIZE; 435 plen += sg_list[i].length; 436 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 437 sg_list[i].length); 438 if (++flitp == queue_end) 439 flitp = queue_start; 440 *flitp = cpu_to_be64(sg_list[i].addr); 441 if (++flitp == queue_end) 442 flitp = queue_start; 443 } 444 *flitp = (__force __be64)0; 445 isglp->op = FW_RI_DATA_ISGL; 446 isglp->r1 = 0; 447 isglp->nsge = cpu_to_be16(num_sge); 448 isglp->r2 = 0; 449 if (plenp) 450 *plenp = plen; 451 return 0; 452 } 453 454 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 455 struct ib_send_wr *wr, u8 *len16) 456 { 457 u32 plen; 458 int size; 459 int ret; 460 461 if (wr->num_sge > T4_MAX_SEND_SGE) 462 return -EINVAL; 463 switch (wr->opcode) { 464 case IB_WR_SEND: 465 if (wr->send_flags & IB_SEND_SOLICITED) 466 wqe->send.sendop_pkd = cpu_to_be32( 467 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE)); 468 else 469 wqe->send.sendop_pkd = cpu_to_be32( 470 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND)); 471 wqe->send.stag_inv = 0; 472 break; 473 case IB_WR_SEND_WITH_INV: 474 if (wr->send_flags & IB_SEND_SOLICITED) 475 wqe->send.sendop_pkd = cpu_to_be32( 476 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE_INV)); 477 else 478 wqe->send.sendop_pkd = cpu_to_be32( 479 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_INV)); 480 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 481 break; 482 483 default: 484 return -EINVAL; 485 } 486 wqe->send.r3 = 0; 487 wqe->send.r4 = 0; 488 489 plen = 0; 490 if (wr->num_sge) { 491 if (wr->send_flags & IB_SEND_INLINE) { 492 ret = build_immd(sq, wqe->send.u.immd_src, wr, 493 T4_MAX_SEND_INLINE, &plen); 494 if (ret) 495 return ret; 496 size = sizeof wqe->send + sizeof(struct fw_ri_immd) + 497 plen; 498 } else { 499 ret = build_isgl((__be64 *)sq->queue, 500 (__be64 *)&sq->queue[sq->size], 501 wqe->send.u.isgl_src, 502 wr->sg_list, wr->num_sge, &plen); 503 if (ret) 504 return ret; 505 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) + 506 wr->num_sge * sizeof(struct fw_ri_sge); 507 } 508 } else { 509 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 510 wqe->send.u.immd_src[0].r1 = 0; 511 wqe->send.u.immd_src[0].r2 = 0; 512 wqe->send.u.immd_src[0].immdlen = 0; 513 size = sizeof wqe->send + sizeof(struct fw_ri_immd); 514 plen = 0; 515 } 516 *len16 = DIV_ROUND_UP(size, 16); 517 wqe->send.plen = cpu_to_be32(plen); 518 return 0; 519 } 520 521 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 522 struct ib_send_wr *wr, u8 *len16) 523 { 524 u32 plen; 525 int size; 526 int ret; 527 528 if (wr->num_sge > T4_MAX_SEND_SGE) 529 return -EINVAL; 530 wqe->write.r2 = 0; 531 wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 532 wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 533 if (wr->num_sge) { 534 if (wr->send_flags & IB_SEND_INLINE) { 535 ret = build_immd(sq, wqe->write.u.immd_src, wr, 536 T4_MAX_WRITE_INLINE, &plen); 537 if (ret) 538 return ret; 539 size = sizeof wqe->write + sizeof(struct fw_ri_immd) + 540 plen; 541 } else { 542 ret = build_isgl((__be64 *)sq->queue, 543 (__be64 *)&sq->queue[sq->size], 544 wqe->write.u.isgl_src, 545 wr->sg_list, wr->num_sge, &plen); 546 if (ret) 547 return ret; 548 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) + 549 wr->num_sge * sizeof(struct fw_ri_sge); 550 } 551 } else { 552 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 553 wqe->write.u.immd_src[0].r1 = 0; 554 wqe->write.u.immd_src[0].r2 = 0; 555 wqe->write.u.immd_src[0].immdlen = 0; 556 size = sizeof wqe->write + sizeof(struct fw_ri_immd); 557 plen = 0; 558 } 559 *len16 = DIV_ROUND_UP(size, 16); 560 wqe->write.plen = cpu_to_be32(plen); 561 return 0; 562 } 563 564 static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16) 565 { 566 if (wr->num_sge > 1) 567 return -EINVAL; 568 if (wr->num_sge) { 569 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); 570 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr 571 >> 32)); 572 wqe->read.to_src_lo = cpu_to_be32((u32)rdma_wr(wr)->remote_addr); 573 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 574 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 575 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 576 >> 32)); 577 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 578 } else { 579 wqe->read.stag_src = cpu_to_be32(2); 580 wqe->read.to_src_hi = 0; 581 wqe->read.to_src_lo = 0; 582 wqe->read.stag_sink = cpu_to_be32(2); 583 wqe->read.plen = 0; 584 wqe->read.to_sink_hi = 0; 585 wqe->read.to_sink_lo = 0; 586 } 587 wqe->read.r2 = 0; 588 wqe->read.r5 = 0; 589 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16); 590 return 0; 591 } 592 593 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 594 struct ib_recv_wr *wr, u8 *len16) 595 { 596 int ret; 597 598 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 599 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 600 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 601 if (ret) 602 return ret; 603 *len16 = DIV_ROUND_UP(sizeof wqe->recv + 604 wr->num_sge * sizeof(struct fw_ri_sge), 16); 605 return 0; 606 } 607 608 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, 609 struct ib_reg_wr *wr, u8 *len16, bool dsgl_supported) 610 { 611 struct c4iw_mr *mhp = to_c4iw_mr(wr->mr); 612 struct fw_ri_immd *imdp; 613 __be64 *p; 614 int i; 615 int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); 616 int rem; 617 618 if (mhp->mpl_len > t4_max_fr_depth(dsgl_supported && use_dsgl)) 619 return -EINVAL; 620 621 wqe->fr.qpbinde_to_dcacpu = 0; 622 wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; 623 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 624 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); 625 wqe->fr.len_hi = 0; 626 wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length); 627 wqe->fr.stag = cpu_to_be32(wr->key); 628 wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 629 wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 630 0xffffffff); 631 632 if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { 633 struct fw_ri_dsgl *sglp; 634 635 for (i = 0; i < mhp->mpl_len; i++) 636 mhp->mpl[i] = (__force u64)cpu_to_be64((u64)mhp->mpl[i]); 637 638 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 639 sglp->op = FW_RI_DATA_DSGL; 640 sglp->r1 = 0; 641 sglp->nsge = cpu_to_be16(1); 642 sglp->addr0 = cpu_to_be64(mhp->mpl_addr); 643 sglp->len0 = cpu_to_be32(pbllen); 644 645 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 646 } else { 647 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 648 imdp->op = FW_RI_DATA_IMMD; 649 imdp->r1 = 0; 650 imdp->r2 = 0; 651 imdp->immdlen = cpu_to_be32(pbllen); 652 p = (__be64 *)(imdp + 1); 653 rem = pbllen; 654 for (i = 0; i < mhp->mpl_len; i++) { 655 *p = cpu_to_be64((u64)mhp->mpl[i]); 656 rem -= sizeof(*p); 657 if (++p == (__be64 *)&sq->queue[sq->size]) 658 p = (__be64 *)sq->queue; 659 } 660 BUG_ON(rem < 0); 661 while (rem) { 662 *p = 0; 663 rem -= sizeof(*p); 664 if (++p == (__be64 *)&sq->queue[sq->size]) 665 p = (__be64 *)sq->queue; 666 } 667 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 668 + pbllen, 16); 669 } 670 return 0; 671 } 672 673 static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr, 674 u8 *len16) 675 { 676 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 677 wqe->inv.r2 = 0; 678 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16); 679 return 0; 680 } 681 682 void c4iw_qp_add_ref(struct ib_qp *qp) 683 { 684 PDBG("%s ib_qp %p\n", __func__, qp); 685 atomic_inc(&(to_c4iw_qp(qp)->refcnt)); 686 } 687 688 void c4iw_qp_rem_ref(struct ib_qp *qp) 689 { 690 PDBG("%s ib_qp %p\n", __func__, qp); 691 if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt))) 692 wake_up(&(to_c4iw_qp(qp)->wait)); 693 } 694 695 static void add_to_fc_list(struct list_head *head, struct list_head *entry) 696 { 697 if (list_empty(entry)) 698 list_add_tail(entry, head); 699 } 700 701 static int ring_kernel_sq_db(struct c4iw_qp *qhp, u16 inc) 702 { 703 unsigned long flags; 704 705 spin_lock_irqsave(&qhp->rhp->lock, flags); 706 spin_lock(&qhp->lock); 707 if (qhp->rhp->db_state == NORMAL) 708 t4_ring_sq_db(&qhp->wq, inc, NULL); 709 else { 710 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 711 qhp->wq.sq.wq_pidx_inc += inc; 712 } 713 spin_unlock(&qhp->lock); 714 spin_unlock_irqrestore(&qhp->rhp->lock, flags); 715 return 0; 716 } 717 718 static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc) 719 { 720 unsigned long flags; 721 722 spin_lock_irqsave(&qhp->rhp->lock, flags); 723 spin_lock(&qhp->lock); 724 if (qhp->rhp->db_state == NORMAL) 725 t4_ring_rq_db(&qhp->wq, inc, NULL); 726 else { 727 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 728 qhp->wq.rq.wq_pidx_inc += inc; 729 } 730 spin_unlock(&qhp->lock); 731 spin_unlock_irqrestore(&qhp->rhp->lock, flags); 732 return 0; 733 } 734 735 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 736 struct ib_send_wr **bad_wr) 737 { 738 int err = 0; 739 u8 len16 = 0; 740 enum fw_wr_opcodes fw_opcode = 0; 741 enum fw_ri_wr_flags fw_flags; 742 struct c4iw_qp *qhp; 743 union t4_wr *wqe = NULL; 744 u32 num_wrs; 745 struct t4_swsqe *swsqe; 746 unsigned long flag; 747 u16 idx = 0; 748 749 qhp = to_c4iw_qp(ibqp); 750 spin_lock_irqsave(&qhp->lock, flag); 751 if (t4_wq_in_error(&qhp->wq)) { 752 spin_unlock_irqrestore(&qhp->lock, flag); 753 return -EINVAL; 754 } 755 num_wrs = t4_sq_avail(&qhp->wq); 756 if (num_wrs == 0) { 757 spin_unlock_irqrestore(&qhp->lock, flag); 758 return -ENOMEM; 759 } 760 while (wr) { 761 if (num_wrs == 0) { 762 err = -ENOMEM; 763 *bad_wr = wr; 764 break; 765 } 766 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 767 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 768 769 fw_flags = 0; 770 if (wr->send_flags & IB_SEND_SOLICITED) 771 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 772 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) 773 fw_flags |= FW_RI_COMPLETION_FLAG; 774 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 775 switch (wr->opcode) { 776 case IB_WR_SEND_WITH_INV: 777 case IB_WR_SEND: 778 if (wr->send_flags & IB_SEND_FENCE) 779 fw_flags |= FW_RI_READ_FENCE_FLAG; 780 fw_opcode = FW_RI_SEND_WR; 781 if (wr->opcode == IB_WR_SEND) 782 swsqe->opcode = FW_RI_SEND; 783 else 784 swsqe->opcode = FW_RI_SEND_WITH_INV; 785 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 786 break; 787 case IB_WR_RDMA_WRITE: 788 fw_opcode = FW_RI_RDMA_WRITE_WR; 789 swsqe->opcode = FW_RI_RDMA_WRITE; 790 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 791 break; 792 case IB_WR_RDMA_READ: 793 case IB_WR_RDMA_READ_WITH_INV: 794 fw_opcode = FW_RI_RDMA_READ_WR; 795 swsqe->opcode = FW_RI_READ_REQ; 796 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) 797 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 798 else 799 fw_flags = 0; 800 err = build_rdma_read(wqe, wr, &len16); 801 if (err) 802 break; 803 swsqe->read_len = wr->sg_list[0].length; 804 if (!qhp->wq.sq.oldest_read) 805 qhp->wq.sq.oldest_read = swsqe; 806 break; 807 case IB_WR_REG_MR: 808 fw_opcode = FW_RI_FR_NSMR_WR; 809 swsqe->opcode = FW_RI_FAST_REGISTER; 810 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), &len16, 811 qhp->rhp->rdev.lldi.ulptx_memwrite_dsgl); 812 break; 813 case IB_WR_LOCAL_INV: 814 if (wr->send_flags & IB_SEND_FENCE) 815 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 816 fw_opcode = FW_RI_INV_LSTAG_WR; 817 swsqe->opcode = FW_RI_LOCAL_INV; 818 err = build_inv_stag(wqe, wr, &len16); 819 break; 820 default: 821 PDBG("%s post of type=%d TBD!\n", __func__, 822 wr->opcode); 823 err = -EINVAL; 824 } 825 if (err) { 826 *bad_wr = wr; 827 break; 828 } 829 swsqe->idx = qhp->wq.sq.pidx; 830 swsqe->complete = 0; 831 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || 832 qhp->sq_sig_all; 833 swsqe->flushed = 0; 834 swsqe->wr_id = wr->wr_id; 835 if (c4iw_wr_log) { 836 swsqe->sge_ts = cxgb4_read_sge_timestamp( 837 qhp->rhp->rdev.lldi.ports[0]); 838 getnstimeofday(&swsqe->host_ts); 839 } 840 841 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 842 843 PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n", 844 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 845 swsqe->opcode, swsqe->read_len); 846 wr = wr->next; 847 num_wrs--; 848 t4_sq_produce(&qhp->wq, len16); 849 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 850 } 851 if (!qhp->rhp->rdev.status_page->db_off) { 852 t4_ring_sq_db(&qhp->wq, idx, wqe); 853 spin_unlock_irqrestore(&qhp->lock, flag); 854 } else { 855 spin_unlock_irqrestore(&qhp->lock, flag); 856 ring_kernel_sq_db(qhp, idx); 857 } 858 return err; 859 } 860 861 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, 862 struct ib_recv_wr **bad_wr) 863 { 864 int err = 0; 865 struct c4iw_qp *qhp; 866 union t4_recv_wr *wqe = NULL; 867 u32 num_wrs; 868 u8 len16 = 0; 869 unsigned long flag; 870 u16 idx = 0; 871 872 qhp = to_c4iw_qp(ibqp); 873 spin_lock_irqsave(&qhp->lock, flag); 874 if (t4_wq_in_error(&qhp->wq)) { 875 spin_unlock_irqrestore(&qhp->lock, flag); 876 return -EINVAL; 877 } 878 num_wrs = t4_rq_avail(&qhp->wq); 879 if (num_wrs == 0) { 880 spin_unlock_irqrestore(&qhp->lock, flag); 881 return -ENOMEM; 882 } 883 while (wr) { 884 if (wr->num_sge > T4_MAX_RECV_SGE) { 885 err = -EINVAL; 886 *bad_wr = wr; 887 break; 888 } 889 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 890 qhp->wq.rq.wq_pidx * 891 T4_EQ_ENTRY_SIZE); 892 if (num_wrs) 893 err = build_rdma_recv(qhp, wqe, wr, &len16); 894 else 895 err = -ENOMEM; 896 if (err) { 897 *bad_wr = wr; 898 break; 899 } 900 901 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 902 if (c4iw_wr_log) { 903 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].sge_ts = 904 cxgb4_read_sge_timestamp( 905 qhp->rhp->rdev.lldi.ports[0]); 906 getnstimeofday( 907 &qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_ts); 908 } 909 910 wqe->recv.opcode = FW_RI_RECV_WR; 911 wqe->recv.r1 = 0; 912 wqe->recv.wrid = qhp->wq.rq.pidx; 913 wqe->recv.r2[0] = 0; 914 wqe->recv.r2[1] = 0; 915 wqe->recv.r2[2] = 0; 916 wqe->recv.len16 = len16; 917 PDBG("%s cookie 0x%llx pidx %u\n", __func__, 918 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx); 919 t4_rq_produce(&qhp->wq, len16); 920 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 921 wr = wr->next; 922 num_wrs--; 923 } 924 if (!qhp->rhp->rdev.status_page->db_off) { 925 t4_ring_rq_db(&qhp->wq, idx, wqe); 926 spin_unlock_irqrestore(&qhp->lock, flag); 927 } else { 928 spin_unlock_irqrestore(&qhp->lock, flag); 929 ring_kernel_rq_db(qhp, idx); 930 } 931 return err; 932 } 933 934 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 935 u8 *ecode) 936 { 937 int status; 938 int tagged; 939 int opcode; 940 int rqtype; 941 int send_inv; 942 943 if (!err_cqe) { 944 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 945 *ecode = 0; 946 return; 947 } 948 949 status = CQE_STATUS(err_cqe); 950 opcode = CQE_OPCODE(err_cqe); 951 rqtype = RQ_TYPE(err_cqe); 952 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 953 (opcode == FW_RI_SEND_WITH_SE_INV); 954 tagged = (opcode == FW_RI_RDMA_WRITE) || 955 (rqtype && (opcode == FW_RI_READ_RESP)); 956 957 switch (status) { 958 case T4_ERR_STAG: 959 if (send_inv) { 960 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 961 *ecode = RDMAP_CANT_INV_STAG; 962 } else { 963 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 964 *ecode = RDMAP_INV_STAG; 965 } 966 break; 967 case T4_ERR_PDID: 968 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 969 if ((opcode == FW_RI_SEND_WITH_INV) || 970 (opcode == FW_RI_SEND_WITH_SE_INV)) 971 *ecode = RDMAP_CANT_INV_STAG; 972 else 973 *ecode = RDMAP_STAG_NOT_ASSOC; 974 break; 975 case T4_ERR_QPID: 976 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 977 *ecode = RDMAP_STAG_NOT_ASSOC; 978 break; 979 case T4_ERR_ACCESS: 980 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 981 *ecode = RDMAP_ACC_VIOL; 982 break; 983 case T4_ERR_WRAP: 984 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 985 *ecode = RDMAP_TO_WRAP; 986 break; 987 case T4_ERR_BOUND: 988 if (tagged) { 989 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 990 *ecode = DDPT_BASE_BOUNDS; 991 } else { 992 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 993 *ecode = RDMAP_BASE_BOUNDS; 994 } 995 break; 996 case T4_ERR_INVALIDATE_SHARED_MR: 997 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 998 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 999 *ecode = RDMAP_CANT_INV_STAG; 1000 break; 1001 case T4_ERR_ECC: 1002 case T4_ERR_ECC_PSTAG: 1003 case T4_ERR_INTERNAL_ERR: 1004 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 1005 *ecode = 0; 1006 break; 1007 case T4_ERR_OUT_OF_RQE: 1008 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1009 *ecode = DDPU_INV_MSN_NOBUF; 1010 break; 1011 case T4_ERR_PBL_ADDR_BOUND: 1012 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1013 *ecode = DDPT_BASE_BOUNDS; 1014 break; 1015 case T4_ERR_CRC: 1016 *layer_type = LAYER_MPA|DDP_LLP; 1017 *ecode = MPA_CRC_ERR; 1018 break; 1019 case T4_ERR_MARKER: 1020 *layer_type = LAYER_MPA|DDP_LLP; 1021 *ecode = MPA_MARKER_ERR; 1022 break; 1023 case T4_ERR_PDU_LEN_ERR: 1024 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1025 *ecode = DDPU_MSG_TOOBIG; 1026 break; 1027 case T4_ERR_DDP_VERSION: 1028 if (tagged) { 1029 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1030 *ecode = DDPT_INV_VERS; 1031 } else { 1032 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1033 *ecode = DDPU_INV_VERS; 1034 } 1035 break; 1036 case T4_ERR_RDMA_VERSION: 1037 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1038 *ecode = RDMAP_INV_VERS; 1039 break; 1040 case T4_ERR_OPCODE: 1041 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1042 *ecode = RDMAP_INV_OPCODE; 1043 break; 1044 case T4_ERR_DDP_QUEUE_NUM: 1045 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1046 *ecode = DDPU_INV_QN; 1047 break; 1048 case T4_ERR_MSN: 1049 case T4_ERR_MSN_GAP: 1050 case T4_ERR_MSN_RANGE: 1051 case T4_ERR_IRD_OVERFLOW: 1052 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1053 *ecode = DDPU_INV_MSN_RANGE; 1054 break; 1055 case T4_ERR_TBIT: 1056 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 1057 *ecode = 0; 1058 break; 1059 case T4_ERR_MO: 1060 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1061 *ecode = DDPU_INV_MO; 1062 break; 1063 default: 1064 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1065 *ecode = 0; 1066 break; 1067 } 1068 } 1069 1070 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 1071 gfp_t gfp) 1072 { 1073 struct fw_ri_wr *wqe; 1074 struct sk_buff *skb; 1075 struct terminate_message *term; 1076 1077 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, 1078 qhp->ep->hwtid); 1079 1080 skb = alloc_skb(sizeof *wqe, gfp); 1081 if (!skb) 1082 return; 1083 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1084 1085 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 1086 memset(wqe, 0, sizeof *wqe); 1087 wqe->op_compl = cpu_to_be32(FW_WR_OP_V(FW_RI_INIT_WR)); 1088 wqe->flowid_len16 = cpu_to_be32( 1089 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1090 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1091 1092 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 1093 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term); 1094 term = (struct terminate_message *)wqe->u.terminate.termmsg; 1095 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 1096 term->layer_etype = qhp->attr.layer_etype; 1097 term->ecode = qhp->attr.ecode; 1098 } else 1099 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 1100 c4iw_ofld_send(&qhp->rhp->rdev, skb); 1101 } 1102 1103 /* 1104 * Assumes qhp lock is held. 1105 */ 1106 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 1107 struct c4iw_cq *schp) 1108 { 1109 int count; 1110 int rq_flushed, sq_flushed; 1111 unsigned long flag; 1112 1113 PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp); 1114 1115 /* locking hierarchy: cq lock first, then qp lock. */ 1116 spin_lock_irqsave(&rchp->lock, flag); 1117 spin_lock(&qhp->lock); 1118 1119 if (qhp->wq.flushed) { 1120 spin_unlock(&qhp->lock); 1121 spin_unlock_irqrestore(&rchp->lock, flag); 1122 return; 1123 } 1124 qhp->wq.flushed = 1; 1125 1126 c4iw_flush_hw_cq(rchp); 1127 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1128 rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1129 spin_unlock(&qhp->lock); 1130 spin_unlock_irqrestore(&rchp->lock, flag); 1131 1132 /* locking hierarchy: cq lock first, then qp lock. */ 1133 spin_lock_irqsave(&schp->lock, flag); 1134 spin_lock(&qhp->lock); 1135 if (schp != rchp) 1136 c4iw_flush_hw_cq(schp); 1137 sq_flushed = c4iw_flush_sq(qhp); 1138 spin_unlock(&qhp->lock); 1139 spin_unlock_irqrestore(&schp->lock, flag); 1140 1141 if (schp == rchp) { 1142 if (t4_clear_cq_armed(&rchp->cq) && 1143 (rq_flushed || sq_flushed)) { 1144 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1145 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1146 rchp->ibcq.cq_context); 1147 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1148 } 1149 } else { 1150 if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) { 1151 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1152 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1153 rchp->ibcq.cq_context); 1154 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1155 } 1156 if (t4_clear_cq_armed(&schp->cq) && sq_flushed) { 1157 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1158 (*schp->ibcq.comp_handler)(&schp->ibcq, 1159 schp->ibcq.cq_context); 1160 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1161 } 1162 } 1163 } 1164 1165 static void flush_qp(struct c4iw_qp *qhp) 1166 { 1167 struct c4iw_cq *rchp, *schp; 1168 unsigned long flag; 1169 1170 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1171 schp = to_c4iw_cq(qhp->ibqp.send_cq); 1172 1173 t4_set_wq_in_error(&qhp->wq); 1174 if (qhp->ibqp.uobject) { 1175 t4_set_cq_in_error(&rchp->cq); 1176 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1177 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1178 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1179 if (schp != rchp) { 1180 t4_set_cq_in_error(&schp->cq); 1181 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1182 (*schp->ibcq.comp_handler)(&schp->ibcq, 1183 schp->ibcq.cq_context); 1184 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1185 } 1186 return; 1187 } 1188 __flush_qp(qhp, rchp, schp); 1189 } 1190 1191 static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1192 struct c4iw_ep *ep) 1193 { 1194 struct fw_ri_wr *wqe; 1195 int ret; 1196 struct sk_buff *skb; 1197 1198 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, 1199 ep->hwtid); 1200 1201 skb = alloc_skb(sizeof *wqe, GFP_KERNEL); 1202 if (!skb) 1203 return -ENOMEM; 1204 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1205 1206 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 1207 memset(wqe, 0, sizeof *wqe); 1208 wqe->op_compl = cpu_to_be32( 1209 FW_WR_OP_V(FW_RI_INIT_WR) | 1210 FW_WR_COMPL_F); 1211 wqe->flowid_len16 = cpu_to_be32( 1212 FW_WR_FLOWID_V(ep->hwtid) | 1213 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1214 wqe->cookie = (uintptr_t)&ep->com.wr_wait; 1215 1216 wqe->u.fini.type = FW_RI_TYPE_FINI; 1217 ret = c4iw_ofld_send(&rhp->rdev, skb); 1218 if (ret) 1219 goto out; 1220 1221 ret = c4iw_wait_for_reply(&rhp->rdev, &ep->com.wr_wait, qhp->ep->hwtid, 1222 qhp->wq.sq.qid, __func__); 1223 out: 1224 PDBG("%s ret %d\n", __func__, ret); 1225 return ret; 1226 } 1227 1228 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1229 { 1230 PDBG("%s p2p_type = %d\n", __func__, p2p_type); 1231 memset(&init->u, 0, sizeof init->u); 1232 switch (p2p_type) { 1233 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1234 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1235 init->u.write.stag_sink = cpu_to_be32(1); 1236 init->u.write.to_sink = cpu_to_be64(1); 1237 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1238 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write + 1239 sizeof(struct fw_ri_immd), 1240 16); 1241 break; 1242 case FW_RI_INIT_P2PTYPE_READ_REQ: 1243 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1244 init->u.read.stag_src = cpu_to_be32(1); 1245 init->u.read.to_src_lo = cpu_to_be32(1); 1246 init->u.read.stag_sink = cpu_to_be32(1); 1247 init->u.read.to_sink_lo = cpu_to_be32(1); 1248 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16); 1249 break; 1250 } 1251 } 1252 1253 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1254 { 1255 struct fw_ri_wr *wqe; 1256 int ret; 1257 struct sk_buff *skb; 1258 1259 PDBG("%s qhp %p qid 0x%x tid %u ird %u ord %u\n", __func__, qhp, 1260 qhp->wq.sq.qid, qhp->ep->hwtid, qhp->ep->ird, qhp->ep->ord); 1261 1262 skb = alloc_skb(sizeof *wqe, GFP_KERNEL); 1263 if (!skb) { 1264 ret = -ENOMEM; 1265 goto out; 1266 } 1267 ret = alloc_ird(rhp, qhp->attr.max_ird); 1268 if (ret) { 1269 qhp->attr.max_ird = 0; 1270 kfree_skb(skb); 1271 goto out; 1272 } 1273 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1274 1275 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 1276 memset(wqe, 0, sizeof *wqe); 1277 wqe->op_compl = cpu_to_be32( 1278 FW_WR_OP_V(FW_RI_INIT_WR) | 1279 FW_WR_COMPL_F); 1280 wqe->flowid_len16 = cpu_to_be32( 1281 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1282 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1283 1284 wqe->cookie = (uintptr_t)&qhp->ep->com.wr_wait; 1285 1286 wqe->u.init.type = FW_RI_TYPE_INIT; 1287 wqe->u.init.mpareqbit_p2ptype = 1288 FW_RI_WR_MPAREQBIT_V(qhp->attr.mpa_attr.initiator) | 1289 FW_RI_WR_P2PTYPE_V(qhp->attr.mpa_attr.p2p_type); 1290 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1291 if (qhp->attr.mpa_attr.recv_marker_enabled) 1292 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1293 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1294 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1295 if (qhp->attr.mpa_attr.crc_enabled) 1296 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1297 1298 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1299 FW_RI_QP_RDMA_WRITE_ENABLE | 1300 FW_RI_QP_BIND_ENABLE; 1301 if (!qhp->ibqp.uobject) 1302 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1303 FW_RI_QP_STAG0_ENABLE; 1304 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1305 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1306 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1307 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1308 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1309 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1310 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1311 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1312 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1313 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq); 1314 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq); 1315 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1316 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1317 rhp->rdev.lldi.vr->rq.start); 1318 if (qhp->attr.mpa_attr.initiator) 1319 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1320 1321 ret = c4iw_ofld_send(&rhp->rdev, skb); 1322 if (ret) 1323 goto err1; 1324 1325 ret = c4iw_wait_for_reply(&rhp->rdev, &qhp->ep->com.wr_wait, 1326 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1327 if (!ret) 1328 goto out; 1329 err1: 1330 free_ird(rhp, qhp->attr.max_ird); 1331 out: 1332 PDBG("%s ret %d\n", __func__, ret); 1333 return ret; 1334 } 1335 1336 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1337 enum c4iw_qp_attr_mask mask, 1338 struct c4iw_qp_attributes *attrs, 1339 int internal) 1340 { 1341 int ret = 0; 1342 struct c4iw_qp_attributes newattr = qhp->attr; 1343 int disconnect = 0; 1344 int terminate = 0; 1345 int abort = 0; 1346 int free = 0; 1347 struct c4iw_ep *ep = NULL; 1348 1349 PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__, 1350 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state, 1351 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1352 1353 mutex_lock(&qhp->mutex); 1354 1355 /* Process attr changes if in IDLE */ 1356 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1357 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1358 ret = -EIO; 1359 goto out; 1360 } 1361 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1362 newattr.enable_rdma_read = attrs->enable_rdma_read; 1363 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1364 newattr.enable_rdma_write = attrs->enable_rdma_write; 1365 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1366 newattr.enable_bind = attrs->enable_bind; 1367 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1368 if (attrs->max_ord > c4iw_max_read_depth) { 1369 ret = -EINVAL; 1370 goto out; 1371 } 1372 newattr.max_ord = attrs->max_ord; 1373 } 1374 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1375 if (attrs->max_ird > cur_max_read_depth(rhp)) { 1376 ret = -EINVAL; 1377 goto out; 1378 } 1379 newattr.max_ird = attrs->max_ird; 1380 } 1381 qhp->attr = newattr; 1382 } 1383 1384 if (mask & C4IW_QP_ATTR_SQ_DB) { 1385 ret = ring_kernel_sq_db(qhp, attrs->sq_db_inc); 1386 goto out; 1387 } 1388 if (mask & C4IW_QP_ATTR_RQ_DB) { 1389 ret = ring_kernel_rq_db(qhp, attrs->rq_db_inc); 1390 goto out; 1391 } 1392 1393 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1394 goto out; 1395 if (qhp->attr.state == attrs->next_state) 1396 goto out; 1397 1398 switch (qhp->attr.state) { 1399 case C4IW_QP_STATE_IDLE: 1400 switch (attrs->next_state) { 1401 case C4IW_QP_STATE_RTS: 1402 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1403 ret = -EINVAL; 1404 goto out; 1405 } 1406 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1407 ret = -EINVAL; 1408 goto out; 1409 } 1410 qhp->attr.mpa_attr = attrs->mpa_attr; 1411 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1412 qhp->ep = qhp->attr.llp_stream_handle; 1413 set_state(qhp, C4IW_QP_STATE_RTS); 1414 1415 /* 1416 * Ref the endpoint here and deref when we 1417 * disassociate the endpoint from the QP. This 1418 * happens in CLOSING->IDLE transition or *->ERROR 1419 * transition. 1420 */ 1421 c4iw_get_ep(&qhp->ep->com); 1422 ret = rdma_init(rhp, qhp); 1423 if (ret) 1424 goto err; 1425 break; 1426 case C4IW_QP_STATE_ERROR: 1427 set_state(qhp, C4IW_QP_STATE_ERROR); 1428 flush_qp(qhp); 1429 break; 1430 default: 1431 ret = -EINVAL; 1432 goto out; 1433 } 1434 break; 1435 case C4IW_QP_STATE_RTS: 1436 switch (attrs->next_state) { 1437 case C4IW_QP_STATE_CLOSING: 1438 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2); 1439 t4_set_wq_in_error(&qhp->wq); 1440 set_state(qhp, C4IW_QP_STATE_CLOSING); 1441 ep = qhp->ep; 1442 if (!internal) { 1443 abort = 0; 1444 disconnect = 1; 1445 c4iw_get_ep(&qhp->ep->com); 1446 } 1447 ret = rdma_fini(rhp, qhp, ep); 1448 if (ret) 1449 goto err; 1450 break; 1451 case C4IW_QP_STATE_TERMINATE: 1452 t4_set_wq_in_error(&qhp->wq); 1453 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1454 qhp->attr.layer_etype = attrs->layer_etype; 1455 qhp->attr.ecode = attrs->ecode; 1456 ep = qhp->ep; 1457 if (!internal) { 1458 c4iw_get_ep(&qhp->ep->com); 1459 terminate = 1; 1460 disconnect = 1; 1461 } else { 1462 terminate = qhp->attr.send_term; 1463 ret = rdma_fini(rhp, qhp, ep); 1464 if (ret) 1465 goto err; 1466 } 1467 break; 1468 case C4IW_QP_STATE_ERROR: 1469 t4_set_wq_in_error(&qhp->wq); 1470 set_state(qhp, C4IW_QP_STATE_ERROR); 1471 if (!internal) { 1472 abort = 1; 1473 disconnect = 1; 1474 ep = qhp->ep; 1475 c4iw_get_ep(&qhp->ep->com); 1476 } 1477 goto err; 1478 break; 1479 default: 1480 ret = -EINVAL; 1481 goto out; 1482 } 1483 break; 1484 case C4IW_QP_STATE_CLOSING: 1485 if (!internal) { 1486 ret = -EINVAL; 1487 goto out; 1488 } 1489 switch (attrs->next_state) { 1490 case C4IW_QP_STATE_IDLE: 1491 flush_qp(qhp); 1492 set_state(qhp, C4IW_QP_STATE_IDLE); 1493 qhp->attr.llp_stream_handle = NULL; 1494 c4iw_put_ep(&qhp->ep->com); 1495 qhp->ep = NULL; 1496 wake_up(&qhp->wait); 1497 break; 1498 case C4IW_QP_STATE_ERROR: 1499 goto err; 1500 default: 1501 ret = -EINVAL; 1502 goto err; 1503 } 1504 break; 1505 case C4IW_QP_STATE_ERROR: 1506 if (attrs->next_state != C4IW_QP_STATE_IDLE) { 1507 ret = -EINVAL; 1508 goto out; 1509 } 1510 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { 1511 ret = -EINVAL; 1512 goto out; 1513 } 1514 set_state(qhp, C4IW_QP_STATE_IDLE); 1515 break; 1516 case C4IW_QP_STATE_TERMINATE: 1517 if (!internal) { 1518 ret = -EINVAL; 1519 goto out; 1520 } 1521 goto err; 1522 break; 1523 default: 1524 printk(KERN_ERR "%s in a bad state %d\n", 1525 __func__, qhp->attr.state); 1526 ret = -EINVAL; 1527 goto err; 1528 break; 1529 } 1530 goto out; 1531 err: 1532 PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep, 1533 qhp->wq.sq.qid); 1534 1535 /* disassociate the LLP connection */ 1536 qhp->attr.llp_stream_handle = NULL; 1537 if (!ep) 1538 ep = qhp->ep; 1539 qhp->ep = NULL; 1540 set_state(qhp, C4IW_QP_STATE_ERROR); 1541 free = 1; 1542 abort = 1; 1543 BUG_ON(!ep); 1544 flush_qp(qhp); 1545 wake_up(&qhp->wait); 1546 out: 1547 mutex_unlock(&qhp->mutex); 1548 1549 if (terminate) 1550 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); 1551 1552 /* 1553 * If disconnect is 1, then we need to initiate a disconnect 1554 * on the EP. This can be a normal close (RTS->CLOSING) or 1555 * an abnormal close (RTS/CLOSING->ERROR). 1556 */ 1557 if (disconnect) { 1558 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : 1559 GFP_KERNEL); 1560 c4iw_put_ep(&ep->com); 1561 } 1562 1563 /* 1564 * If free is 1, then we've disassociated the EP from the QP 1565 * and we need to dereference the EP. 1566 */ 1567 if (free) 1568 c4iw_put_ep(&ep->com); 1569 PDBG("%s exit state %d\n", __func__, qhp->attr.state); 1570 return ret; 1571 } 1572 1573 int c4iw_destroy_qp(struct ib_qp *ib_qp) 1574 { 1575 struct c4iw_dev *rhp; 1576 struct c4iw_qp *qhp; 1577 struct c4iw_qp_attributes attrs; 1578 struct c4iw_ucontext *ucontext; 1579 1580 qhp = to_c4iw_qp(ib_qp); 1581 rhp = qhp->rhp; 1582 1583 attrs.next_state = C4IW_QP_STATE_ERROR; 1584 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) 1585 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1586 else 1587 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1588 wait_event(qhp->wait, !qhp->ep); 1589 1590 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1591 atomic_dec(&qhp->refcnt); 1592 wait_event(qhp->wait, !atomic_read(&qhp->refcnt)); 1593 1594 spin_lock_irq(&rhp->lock); 1595 if (!list_empty(&qhp->db_fc_entry)) 1596 list_del_init(&qhp->db_fc_entry); 1597 spin_unlock_irq(&rhp->lock); 1598 free_ird(rhp, qhp->attr.max_ird); 1599 1600 ucontext = ib_qp->uobject ? 1601 to_c4iw_ucontext(ib_qp->uobject->context) : NULL; 1602 destroy_qp(&rhp->rdev, &qhp->wq, 1603 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1604 1605 PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid); 1606 kfree(qhp); 1607 return 0; 1608 } 1609 1610 struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, 1611 struct ib_udata *udata) 1612 { 1613 struct c4iw_dev *rhp; 1614 struct c4iw_qp *qhp; 1615 struct c4iw_pd *php; 1616 struct c4iw_cq *schp; 1617 struct c4iw_cq *rchp; 1618 struct c4iw_create_qp_resp uresp; 1619 unsigned int sqsize, rqsize; 1620 struct c4iw_ucontext *ucontext; 1621 int ret; 1622 struct c4iw_mm_entry *sq_key_mm, *rq_key_mm = NULL, *sq_db_key_mm; 1623 struct c4iw_mm_entry *rq_db_key_mm = NULL, *ma_sync_key_mm = NULL; 1624 1625 PDBG("%s ib_pd %p\n", __func__, pd); 1626 1627 if (attrs->qp_type != IB_QPT_RC) 1628 return ERR_PTR(-EINVAL); 1629 1630 php = to_c4iw_pd(pd); 1631 rhp = php->rhp; 1632 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 1633 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 1634 if (!schp || !rchp) 1635 return ERR_PTR(-EINVAL); 1636 1637 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 1638 return ERR_PTR(-EINVAL); 1639 1640 if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) 1641 return ERR_PTR(-E2BIG); 1642 rqsize = attrs->cap.max_recv_wr + 1; 1643 if (rqsize < 8) 1644 rqsize = 8; 1645 1646 if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) 1647 return ERR_PTR(-E2BIG); 1648 sqsize = attrs->cap.max_send_wr + 1; 1649 if (sqsize < 8) 1650 sqsize = 8; 1651 1652 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL; 1653 1654 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL); 1655 if (!qhp) 1656 return ERR_PTR(-ENOMEM); 1657 qhp->wq.sq.size = sqsize; 1658 qhp->wq.sq.memsize = 1659 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1660 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); 1661 qhp->wq.sq.flush_cidx = -1; 1662 qhp->wq.rq.size = rqsize; 1663 qhp->wq.rq.memsize = 1664 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1665 sizeof(*qhp->wq.rq.queue); 1666 1667 if (ucontext) { 1668 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 1669 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE); 1670 } 1671 1672 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 1673 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1674 if (ret) 1675 goto err1; 1676 1677 attrs->cap.max_recv_wr = rqsize - 1; 1678 attrs->cap.max_send_wr = sqsize - 1; 1679 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 1680 1681 qhp->rhp = rhp; 1682 qhp->attr.pd = php->pdid; 1683 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 1684 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 1685 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 1686 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 1687 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 1688 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 1689 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 1690 qhp->attr.state = C4IW_QP_STATE_IDLE; 1691 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 1692 qhp->attr.enable_rdma_read = 1; 1693 qhp->attr.enable_rdma_write = 1; 1694 qhp->attr.enable_bind = 1; 1695 qhp->attr.max_ord = 0; 1696 qhp->attr.max_ird = 0; 1697 qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; 1698 spin_lock_init(&qhp->lock); 1699 init_completion(&qhp->sq_drained); 1700 init_completion(&qhp->rq_drained); 1701 mutex_init(&qhp->mutex); 1702 init_waitqueue_head(&qhp->wait); 1703 atomic_set(&qhp->refcnt, 1); 1704 1705 ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); 1706 if (ret) 1707 goto err2; 1708 1709 if (udata) { 1710 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); 1711 if (!sq_key_mm) { 1712 ret = -ENOMEM; 1713 goto err3; 1714 } 1715 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); 1716 if (!rq_key_mm) { 1717 ret = -ENOMEM; 1718 goto err4; 1719 } 1720 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); 1721 if (!sq_db_key_mm) { 1722 ret = -ENOMEM; 1723 goto err5; 1724 } 1725 rq_db_key_mm = kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); 1726 if (!rq_db_key_mm) { 1727 ret = -ENOMEM; 1728 goto err6; 1729 } 1730 if (t4_sq_onchip(&qhp->wq.sq)) { 1731 ma_sync_key_mm = kmalloc(sizeof(*ma_sync_key_mm), 1732 GFP_KERNEL); 1733 if (!ma_sync_key_mm) { 1734 ret = -ENOMEM; 1735 goto err7; 1736 } 1737 uresp.flags = C4IW_QPF_ONCHIP; 1738 } else 1739 uresp.flags = 0; 1740 uresp.qid_mask = rhp->rdev.qpmask; 1741 uresp.sqid = qhp->wq.sq.qid; 1742 uresp.sq_size = qhp->wq.sq.size; 1743 uresp.sq_memsize = qhp->wq.sq.memsize; 1744 uresp.rqid = qhp->wq.rq.qid; 1745 uresp.rq_size = qhp->wq.rq.size; 1746 uresp.rq_memsize = qhp->wq.rq.memsize; 1747 spin_lock(&ucontext->mmap_lock); 1748 if (ma_sync_key_mm) { 1749 uresp.ma_sync_key = ucontext->key; 1750 ucontext->key += PAGE_SIZE; 1751 } else { 1752 uresp.ma_sync_key = 0; 1753 } 1754 uresp.sq_key = ucontext->key; 1755 ucontext->key += PAGE_SIZE; 1756 uresp.rq_key = ucontext->key; 1757 ucontext->key += PAGE_SIZE; 1758 uresp.sq_db_gts_key = ucontext->key; 1759 ucontext->key += PAGE_SIZE; 1760 uresp.rq_db_gts_key = ucontext->key; 1761 ucontext->key += PAGE_SIZE; 1762 spin_unlock(&ucontext->mmap_lock); 1763 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp); 1764 if (ret) 1765 goto err8; 1766 sq_key_mm->key = uresp.sq_key; 1767 sq_key_mm->addr = qhp->wq.sq.phys_addr; 1768 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); 1769 insert_mmap(ucontext, sq_key_mm); 1770 rq_key_mm->key = uresp.rq_key; 1771 rq_key_mm->addr = virt_to_phys(qhp->wq.rq.queue); 1772 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); 1773 insert_mmap(ucontext, rq_key_mm); 1774 sq_db_key_mm->key = uresp.sq_db_gts_key; 1775 sq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.sq.bar2_pa; 1776 sq_db_key_mm->len = PAGE_SIZE; 1777 insert_mmap(ucontext, sq_db_key_mm); 1778 rq_db_key_mm->key = uresp.rq_db_gts_key; 1779 rq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.rq.bar2_pa; 1780 rq_db_key_mm->len = PAGE_SIZE; 1781 insert_mmap(ucontext, rq_db_key_mm); 1782 if (ma_sync_key_mm) { 1783 ma_sync_key_mm->key = uresp.ma_sync_key; 1784 ma_sync_key_mm->addr = 1785 (pci_resource_start(rhp->rdev.lldi.pdev, 0) + 1786 PCIE_MA_SYNC_A) & PAGE_MASK; 1787 ma_sync_key_mm->len = PAGE_SIZE; 1788 insert_mmap(ucontext, ma_sync_key_mm); 1789 } 1790 } 1791 qhp->ibqp.qp_num = qhp->wq.sq.qid; 1792 init_timer(&(qhp->timer)); 1793 INIT_LIST_HEAD(&qhp->db_fc_entry); 1794 PDBG("%s sq id %u size %u memsize %zu num_entries %u " 1795 "rq id %u size %u memsize %zu num_entries %u\n", __func__, 1796 qhp->wq.sq.qid, qhp->wq.sq.size, qhp->wq.sq.memsize, 1797 attrs->cap.max_send_wr, qhp->wq.rq.qid, qhp->wq.rq.size, 1798 qhp->wq.rq.memsize, attrs->cap.max_recv_wr); 1799 return &qhp->ibqp; 1800 err8: 1801 kfree(ma_sync_key_mm); 1802 err7: 1803 kfree(rq_db_key_mm); 1804 err6: 1805 kfree(sq_db_key_mm); 1806 err5: 1807 kfree(rq_key_mm); 1808 err4: 1809 kfree(sq_key_mm); 1810 err3: 1811 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1812 err2: 1813 destroy_qp(&rhp->rdev, &qhp->wq, 1814 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1815 err1: 1816 kfree(qhp); 1817 return ERR_PTR(ret); 1818 } 1819 1820 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1821 int attr_mask, struct ib_udata *udata) 1822 { 1823 struct c4iw_dev *rhp; 1824 struct c4iw_qp *qhp; 1825 enum c4iw_qp_attr_mask mask = 0; 1826 struct c4iw_qp_attributes attrs; 1827 1828 PDBG("%s ib_qp %p\n", __func__, ibqp); 1829 1830 /* iwarp does not support the RTR state */ 1831 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 1832 attr_mask &= ~IB_QP_STATE; 1833 1834 /* Make sure we still have something left to do */ 1835 if (!attr_mask) 1836 return 0; 1837 1838 memset(&attrs, 0, sizeof attrs); 1839 qhp = to_c4iw_qp(ibqp); 1840 rhp = qhp->rhp; 1841 1842 attrs.next_state = c4iw_convert_state(attr->qp_state); 1843 attrs.enable_rdma_read = (attr->qp_access_flags & 1844 IB_ACCESS_REMOTE_READ) ? 1 : 0; 1845 attrs.enable_rdma_write = (attr->qp_access_flags & 1846 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 1847 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 1848 1849 1850 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 1851 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 1852 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 1853 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 1854 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 1855 1856 /* 1857 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for 1858 * ringing the queue db when we're in DB_FULL mode. 1859 * Only allow this on T4 devices. 1860 */ 1861 attrs.sq_db_inc = attr->sq_psn; 1862 attrs.rq_db_inc = attr->rq_psn; 1863 mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0; 1864 mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0; 1865 if (!is_t4(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) && 1866 (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB))) 1867 return -EINVAL; 1868 1869 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 1870 } 1871 1872 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 1873 { 1874 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn); 1875 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 1876 } 1877 1878 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1879 int attr_mask, struct ib_qp_init_attr *init_attr) 1880 { 1881 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 1882 1883 memset(attr, 0, sizeof *attr); 1884 memset(init_attr, 0, sizeof *init_attr); 1885 attr->qp_state = to_ib_qp_state(qhp->attr.state); 1886 init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; 1887 init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; 1888 init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; 1889 init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges; 1890 init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; 1891 init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; 1892 return 0; 1893 } 1894 1895 void c4iw_drain_sq(struct ib_qp *ibqp) 1896 { 1897 struct c4iw_qp *qp = to_c4iw_qp(ibqp); 1898 1899 wait_for_completion(&qp->sq_drained); 1900 } 1901 1902 void c4iw_drain_rq(struct ib_qp *ibqp) 1903 { 1904 struct c4iw_qp *qp = to_c4iw_qp(ibqp); 1905 1906 wait_for_completion(&qp->rq_drained); 1907 } 1908