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 void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) 62 { 63 unsigned long flag; 64 spin_lock_irqsave(&qhp->lock, flag); 65 qhp->attr.state = state; 66 spin_unlock_irqrestore(&qhp->lock, flag); 67 } 68 69 static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 70 { 71 c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize); 72 } 73 74 static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 75 { 76 dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue, 77 pci_unmap_addr(sq, mapping)); 78 } 79 80 static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 81 { 82 if (t4_sq_onchip(sq)) 83 dealloc_oc_sq(rdev, sq); 84 else 85 dealloc_host_sq(rdev, sq); 86 } 87 88 static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 89 { 90 if (!ocqp_support || !ocqp_supported(&rdev->lldi)) 91 return -ENOSYS; 92 sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize); 93 if (!sq->dma_addr) 94 return -ENOMEM; 95 sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr - 96 rdev->lldi.vr->ocq.start; 97 sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr - 98 rdev->lldi.vr->ocq.start); 99 sq->flags |= T4_SQ_ONCHIP; 100 return 0; 101 } 102 103 static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 104 { 105 sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize, 106 &(sq->dma_addr), GFP_KERNEL); 107 if (!sq->queue) 108 return -ENOMEM; 109 sq->phys_addr = virt_to_phys(sq->queue); 110 pci_unmap_addr_set(sq, mapping, sq->dma_addr); 111 return 0; 112 } 113 114 static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user) 115 { 116 int ret = -ENOSYS; 117 if (user) 118 ret = alloc_oc_sq(rdev, sq); 119 if (ret) 120 ret = alloc_host_sq(rdev, sq); 121 return ret; 122 } 123 124 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 125 struct c4iw_dev_ucontext *uctx) 126 { 127 /* 128 * uP clears EQ contexts when the connection exits rdma mode, 129 * so no need to post a RESET WR for these EQs. 130 */ 131 dma_free_coherent(&(rdev->lldi.pdev->dev), 132 wq->rq.memsize, wq->rq.queue, 133 dma_unmap_addr(&wq->rq, mapping)); 134 dealloc_sq(rdev, &wq->sq); 135 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 136 kfree(wq->rq.sw_rq); 137 kfree(wq->sq.sw_sq); 138 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 139 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 140 return 0; 141 } 142 143 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 144 struct t4_cq *rcq, struct t4_cq *scq, 145 struct c4iw_dev_ucontext *uctx) 146 { 147 int user = (uctx != &rdev->uctx); 148 struct fw_ri_res_wr *res_wr; 149 struct fw_ri_res *res; 150 int wr_len; 151 struct c4iw_wr_wait wr_wait; 152 struct sk_buff *skb; 153 int ret = 0; 154 int eqsize; 155 156 wq->sq.qid = c4iw_get_qpid(rdev, uctx); 157 if (!wq->sq.qid) 158 return -ENOMEM; 159 160 wq->rq.qid = c4iw_get_qpid(rdev, uctx); 161 if (!wq->rq.qid) { 162 ret = -ENOMEM; 163 goto free_sq_qid; 164 } 165 166 if (!user) { 167 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq, 168 GFP_KERNEL); 169 if (!wq->sq.sw_sq) { 170 ret = -ENOMEM; 171 goto free_rq_qid; 172 } 173 174 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq, 175 GFP_KERNEL); 176 if (!wq->rq.sw_rq) { 177 ret = -ENOMEM; 178 goto free_sw_sq; 179 } 180 } 181 182 /* 183 * RQT must be a power of 2. 184 */ 185 wq->rq.rqt_size = roundup_pow_of_two(wq->rq.size); 186 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); 187 if (!wq->rq.rqt_hwaddr) { 188 ret = -ENOMEM; 189 goto free_sw_rq; 190 } 191 192 ret = alloc_sq(rdev, &wq->sq, user); 193 if (ret) 194 goto free_hwaddr; 195 memset(wq->sq.queue, 0, wq->sq.memsize); 196 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); 197 198 wq->rq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), 199 wq->rq.memsize, &(wq->rq.dma_addr), 200 GFP_KERNEL); 201 if (!wq->rq.queue) { 202 ret = -ENOMEM; 203 goto free_sq; 204 } 205 PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n", 206 __func__, wq->sq.queue, 207 (unsigned long long)virt_to_phys(wq->sq.queue), 208 wq->rq.queue, 209 (unsigned long long)virt_to_phys(wq->rq.queue)); 210 memset(wq->rq.queue, 0, wq->rq.memsize); 211 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); 212 213 wq->db = rdev->lldi.db_reg; 214 wq->gts = rdev->lldi.gts_reg; 215 if (user) { 216 wq->sq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) + 217 (wq->sq.qid << rdev->qpshift); 218 wq->sq.udb &= PAGE_MASK; 219 wq->rq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) + 220 (wq->rq.qid << rdev->qpshift); 221 wq->rq.udb &= PAGE_MASK; 222 } 223 wq->rdev = rdev; 224 wq->rq.msn = 1; 225 226 /* build fw_ri_res_wr */ 227 wr_len = sizeof *res_wr + 2 * sizeof *res; 228 229 skb = alloc_skb(wr_len, GFP_KERNEL); 230 if (!skb) { 231 ret = -ENOMEM; 232 goto free_dma; 233 } 234 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 235 236 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 237 memset(res_wr, 0, wr_len); 238 res_wr->op_nres = cpu_to_be32( 239 FW_WR_OP(FW_RI_RES_WR) | 240 V_FW_RI_RES_WR_NRES(2) | 241 FW_WR_COMPL(1)); 242 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 243 res_wr->cookie = (unsigned long) &wr_wait; 244 res = res_wr->res; 245 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 246 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 247 248 /* 249 * eqsize is the number of 64B entries plus the status page size. 250 */ 251 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES; 252 253 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 254 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 255 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 256 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 257 (t4_sq_onchip(&wq->sq) ? F_FW_RI_RES_WR_ONCHIP : 0) | 258 V_FW_RI_RES_WR_IQID(scq->cqid)); 259 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 260 V_FW_RI_RES_WR_DCAEN(0) | 261 V_FW_RI_RES_WR_DCACPU(0) | 262 V_FW_RI_RES_WR_FBMIN(2) | 263 V_FW_RI_RES_WR_FBMAX(2) | 264 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 265 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 266 V_FW_RI_RES_WR_EQSIZE(eqsize)); 267 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 268 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 269 res++; 270 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 271 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 272 273 /* 274 * eqsize is the number of 64B entries plus the status page size. 275 */ 276 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES; 277 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 278 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 279 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 280 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 281 V_FW_RI_RES_WR_IQID(rcq->cqid)); 282 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 283 V_FW_RI_RES_WR_DCAEN(0) | 284 V_FW_RI_RES_WR_DCACPU(0) | 285 V_FW_RI_RES_WR_FBMIN(2) | 286 V_FW_RI_RES_WR_FBMAX(2) | 287 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 288 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 289 V_FW_RI_RES_WR_EQSIZE(eqsize)); 290 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 291 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 292 293 c4iw_init_wr_wait(&wr_wait); 294 295 ret = c4iw_ofld_send(rdev, skb); 296 if (ret) 297 goto free_dma; 298 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, __func__); 299 if (ret) 300 goto free_dma; 301 302 PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx\n", 303 __func__, wq->sq.qid, wq->rq.qid, wq->db, 304 (unsigned long long)wq->sq.udb, (unsigned long long)wq->rq.udb); 305 306 return 0; 307 free_dma: 308 dma_free_coherent(&(rdev->lldi.pdev->dev), 309 wq->rq.memsize, wq->rq.queue, 310 dma_unmap_addr(&wq->rq, mapping)); 311 free_sq: 312 dealloc_sq(rdev, &wq->sq); 313 free_hwaddr: 314 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 315 free_sw_rq: 316 kfree(wq->rq.sw_rq); 317 free_sw_sq: 318 kfree(wq->sq.sw_sq); 319 free_rq_qid: 320 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 321 free_sq_qid: 322 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 323 return ret; 324 } 325 326 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 327 struct ib_send_wr *wr, int max, u32 *plenp) 328 { 329 u8 *dstp, *srcp; 330 u32 plen = 0; 331 int i; 332 int rem, len; 333 334 dstp = (u8 *)immdp->data; 335 for (i = 0; i < wr->num_sge; i++) { 336 if ((plen + wr->sg_list[i].length) > max) 337 return -EMSGSIZE; 338 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 339 plen += wr->sg_list[i].length; 340 rem = wr->sg_list[i].length; 341 while (rem) { 342 if (dstp == (u8 *)&sq->queue[sq->size]) 343 dstp = (u8 *)sq->queue; 344 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 345 len = rem; 346 else 347 len = (u8 *)&sq->queue[sq->size] - dstp; 348 memcpy(dstp, srcp, len); 349 dstp += len; 350 srcp += len; 351 rem -= len; 352 } 353 } 354 len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp); 355 if (len) 356 memset(dstp, 0, len); 357 immdp->op = FW_RI_DATA_IMMD; 358 immdp->r1 = 0; 359 immdp->r2 = 0; 360 immdp->immdlen = cpu_to_be32(plen); 361 *plenp = plen; 362 return 0; 363 } 364 365 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 366 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 367 int num_sge, u32 *plenp) 368 369 { 370 int i; 371 u32 plen = 0; 372 __be64 *flitp = (__be64 *)isglp->sge; 373 374 for (i = 0; i < num_sge; i++) { 375 if ((plen + sg_list[i].length) < plen) 376 return -EMSGSIZE; 377 plen += sg_list[i].length; 378 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 379 sg_list[i].length); 380 if (++flitp == queue_end) 381 flitp = queue_start; 382 *flitp = cpu_to_be64(sg_list[i].addr); 383 if (++flitp == queue_end) 384 flitp = queue_start; 385 } 386 *flitp = (__force __be64)0; 387 isglp->op = FW_RI_DATA_ISGL; 388 isglp->r1 = 0; 389 isglp->nsge = cpu_to_be16(num_sge); 390 isglp->r2 = 0; 391 if (plenp) 392 *plenp = plen; 393 return 0; 394 } 395 396 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 397 struct ib_send_wr *wr, u8 *len16) 398 { 399 u32 plen; 400 int size; 401 int ret; 402 403 if (wr->num_sge > T4_MAX_SEND_SGE) 404 return -EINVAL; 405 switch (wr->opcode) { 406 case IB_WR_SEND: 407 if (wr->send_flags & IB_SEND_SOLICITED) 408 wqe->send.sendop_pkd = cpu_to_be32( 409 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE)); 410 else 411 wqe->send.sendop_pkd = cpu_to_be32( 412 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND)); 413 wqe->send.stag_inv = 0; 414 break; 415 case IB_WR_SEND_WITH_INV: 416 if (wr->send_flags & IB_SEND_SOLICITED) 417 wqe->send.sendop_pkd = cpu_to_be32( 418 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV)); 419 else 420 wqe->send.sendop_pkd = cpu_to_be32( 421 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV)); 422 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 423 break; 424 425 default: 426 return -EINVAL; 427 } 428 429 plen = 0; 430 if (wr->num_sge) { 431 if (wr->send_flags & IB_SEND_INLINE) { 432 ret = build_immd(sq, wqe->send.u.immd_src, wr, 433 T4_MAX_SEND_INLINE, &plen); 434 if (ret) 435 return ret; 436 size = sizeof wqe->send + sizeof(struct fw_ri_immd) + 437 plen; 438 } else { 439 ret = build_isgl((__be64 *)sq->queue, 440 (__be64 *)&sq->queue[sq->size], 441 wqe->send.u.isgl_src, 442 wr->sg_list, wr->num_sge, &plen); 443 if (ret) 444 return ret; 445 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) + 446 wr->num_sge * sizeof(struct fw_ri_sge); 447 } 448 } else { 449 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 450 wqe->send.u.immd_src[0].r1 = 0; 451 wqe->send.u.immd_src[0].r2 = 0; 452 wqe->send.u.immd_src[0].immdlen = 0; 453 size = sizeof wqe->send + sizeof(struct fw_ri_immd); 454 plen = 0; 455 } 456 *len16 = DIV_ROUND_UP(size, 16); 457 wqe->send.plen = cpu_to_be32(plen); 458 return 0; 459 } 460 461 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 462 struct ib_send_wr *wr, u8 *len16) 463 { 464 u32 plen; 465 int size; 466 int ret; 467 468 if (wr->num_sge > T4_MAX_SEND_SGE) 469 return -EINVAL; 470 wqe->write.r2 = 0; 471 wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey); 472 wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr); 473 if (wr->num_sge) { 474 if (wr->send_flags & IB_SEND_INLINE) { 475 ret = build_immd(sq, wqe->write.u.immd_src, wr, 476 T4_MAX_WRITE_INLINE, &plen); 477 if (ret) 478 return ret; 479 size = sizeof wqe->write + sizeof(struct fw_ri_immd) + 480 plen; 481 } else { 482 ret = build_isgl((__be64 *)sq->queue, 483 (__be64 *)&sq->queue[sq->size], 484 wqe->write.u.isgl_src, 485 wr->sg_list, wr->num_sge, &plen); 486 if (ret) 487 return ret; 488 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) + 489 wr->num_sge * sizeof(struct fw_ri_sge); 490 } 491 } else { 492 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 493 wqe->write.u.immd_src[0].r1 = 0; 494 wqe->write.u.immd_src[0].r2 = 0; 495 wqe->write.u.immd_src[0].immdlen = 0; 496 size = sizeof wqe->write + sizeof(struct fw_ri_immd); 497 plen = 0; 498 } 499 *len16 = DIV_ROUND_UP(size, 16); 500 wqe->write.plen = cpu_to_be32(plen); 501 return 0; 502 } 503 504 static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16) 505 { 506 if (wr->num_sge > 1) 507 return -EINVAL; 508 if (wr->num_sge) { 509 wqe->read.stag_src = cpu_to_be32(wr->wr.rdma.rkey); 510 wqe->read.to_src_hi = cpu_to_be32((u32)(wr->wr.rdma.remote_addr 511 >> 32)); 512 wqe->read.to_src_lo = cpu_to_be32((u32)wr->wr.rdma.remote_addr); 513 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 514 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 515 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 516 >> 32)); 517 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 518 } else { 519 wqe->read.stag_src = cpu_to_be32(2); 520 wqe->read.to_src_hi = 0; 521 wqe->read.to_src_lo = 0; 522 wqe->read.stag_sink = cpu_to_be32(2); 523 wqe->read.plen = 0; 524 wqe->read.to_sink_hi = 0; 525 wqe->read.to_sink_lo = 0; 526 } 527 wqe->read.r2 = 0; 528 wqe->read.r5 = 0; 529 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16); 530 return 0; 531 } 532 533 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 534 struct ib_recv_wr *wr, u8 *len16) 535 { 536 int ret; 537 538 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 539 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 540 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 541 if (ret) 542 return ret; 543 *len16 = DIV_ROUND_UP(sizeof wqe->recv + 544 wr->num_sge * sizeof(struct fw_ri_sge), 16); 545 return 0; 546 } 547 548 static int build_fastreg(struct t4_sq *sq, union t4_wr *wqe, 549 struct ib_send_wr *wr, u8 *len16, u8 t5dev) 550 { 551 552 struct fw_ri_immd *imdp; 553 __be64 *p; 554 int i; 555 int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32); 556 int rem; 557 558 if (wr->wr.fast_reg.page_list_len > T4_MAX_FR_DEPTH) 559 return -EINVAL; 560 561 wqe->fr.qpbinde_to_dcacpu = 0; 562 wqe->fr.pgsz_shift = wr->wr.fast_reg.page_shift - 12; 563 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 564 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->wr.fast_reg.access_flags); 565 wqe->fr.len_hi = 0; 566 wqe->fr.len_lo = cpu_to_be32(wr->wr.fast_reg.length); 567 wqe->fr.stag = cpu_to_be32(wr->wr.fast_reg.rkey); 568 wqe->fr.va_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32); 569 wqe->fr.va_lo_fbo = cpu_to_be32(wr->wr.fast_reg.iova_start & 570 0xffffffff); 571 572 if (t5dev && use_dsgl && (pbllen > max_fr_immd)) { 573 struct c4iw_fr_page_list *c4pl = 574 to_c4iw_fr_page_list(wr->wr.fast_reg.page_list); 575 struct fw_ri_dsgl *sglp; 576 577 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) { 578 wr->wr.fast_reg.page_list->page_list[i] = (__force u64) 579 cpu_to_be64((u64) 580 wr->wr.fast_reg.page_list->page_list[i]); 581 } 582 583 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 584 sglp->op = FW_RI_DATA_DSGL; 585 sglp->r1 = 0; 586 sglp->nsge = cpu_to_be16(1); 587 sglp->addr0 = cpu_to_be64(c4pl->dma_addr); 588 sglp->len0 = cpu_to_be32(pbllen); 589 590 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 591 } else { 592 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 593 imdp->op = FW_RI_DATA_IMMD; 594 imdp->r1 = 0; 595 imdp->r2 = 0; 596 imdp->immdlen = cpu_to_be32(pbllen); 597 p = (__be64 *)(imdp + 1); 598 rem = pbllen; 599 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) { 600 *p = cpu_to_be64( 601 (u64)wr->wr.fast_reg.page_list->page_list[i]); 602 rem -= sizeof(*p); 603 if (++p == (__be64 *)&sq->queue[sq->size]) 604 p = (__be64 *)sq->queue; 605 } 606 BUG_ON(rem < 0); 607 while (rem) { 608 *p = 0; 609 rem -= sizeof(*p); 610 if (++p == (__be64 *)&sq->queue[sq->size]) 611 p = (__be64 *)sq->queue; 612 } 613 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 614 + pbllen, 16); 615 } 616 return 0; 617 } 618 619 static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr, 620 u8 *len16) 621 { 622 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 623 wqe->inv.r2 = 0; 624 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16); 625 return 0; 626 } 627 628 void c4iw_qp_add_ref(struct ib_qp *qp) 629 { 630 PDBG("%s ib_qp %p\n", __func__, qp); 631 atomic_inc(&(to_c4iw_qp(qp)->refcnt)); 632 } 633 634 void c4iw_qp_rem_ref(struct ib_qp *qp) 635 { 636 PDBG("%s ib_qp %p\n", __func__, qp); 637 if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt))) 638 wake_up(&(to_c4iw_qp(qp)->wait)); 639 } 640 641 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 642 struct ib_send_wr **bad_wr) 643 { 644 int err = 0; 645 u8 len16 = 0; 646 enum fw_wr_opcodes fw_opcode = 0; 647 enum fw_ri_wr_flags fw_flags; 648 struct c4iw_qp *qhp; 649 union t4_wr *wqe; 650 u32 num_wrs; 651 struct t4_swsqe *swsqe; 652 unsigned long flag; 653 u16 idx = 0; 654 655 qhp = to_c4iw_qp(ibqp); 656 spin_lock_irqsave(&qhp->lock, flag); 657 if (t4_wq_in_error(&qhp->wq)) { 658 spin_unlock_irqrestore(&qhp->lock, flag); 659 return -EINVAL; 660 } 661 num_wrs = t4_sq_avail(&qhp->wq); 662 if (num_wrs == 0) { 663 spin_unlock_irqrestore(&qhp->lock, flag); 664 return -ENOMEM; 665 } 666 while (wr) { 667 if (num_wrs == 0) { 668 err = -ENOMEM; 669 *bad_wr = wr; 670 break; 671 } 672 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 673 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 674 675 fw_flags = 0; 676 if (wr->send_flags & IB_SEND_SOLICITED) 677 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 678 if (wr->send_flags & IB_SEND_SIGNALED) 679 fw_flags |= FW_RI_COMPLETION_FLAG; 680 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 681 switch (wr->opcode) { 682 case IB_WR_SEND_WITH_INV: 683 case IB_WR_SEND: 684 if (wr->send_flags & IB_SEND_FENCE) 685 fw_flags |= FW_RI_READ_FENCE_FLAG; 686 fw_opcode = FW_RI_SEND_WR; 687 if (wr->opcode == IB_WR_SEND) 688 swsqe->opcode = FW_RI_SEND; 689 else 690 swsqe->opcode = FW_RI_SEND_WITH_INV; 691 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 692 break; 693 case IB_WR_RDMA_WRITE: 694 fw_opcode = FW_RI_RDMA_WRITE_WR; 695 swsqe->opcode = FW_RI_RDMA_WRITE; 696 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 697 break; 698 case IB_WR_RDMA_READ: 699 case IB_WR_RDMA_READ_WITH_INV: 700 fw_opcode = FW_RI_RDMA_READ_WR; 701 swsqe->opcode = FW_RI_READ_REQ; 702 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) 703 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 704 else 705 fw_flags = 0; 706 err = build_rdma_read(wqe, wr, &len16); 707 if (err) 708 break; 709 swsqe->read_len = wr->sg_list[0].length; 710 if (!qhp->wq.sq.oldest_read) 711 qhp->wq.sq.oldest_read = swsqe; 712 break; 713 case IB_WR_FAST_REG_MR: 714 fw_opcode = FW_RI_FR_NSMR_WR; 715 swsqe->opcode = FW_RI_FAST_REGISTER; 716 err = build_fastreg(&qhp->wq.sq, wqe, wr, &len16, 717 is_t5( 718 qhp->rhp->rdev.lldi.adapter_type) ? 719 1 : 0); 720 break; 721 case IB_WR_LOCAL_INV: 722 if (wr->send_flags & IB_SEND_FENCE) 723 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 724 fw_opcode = FW_RI_INV_LSTAG_WR; 725 swsqe->opcode = FW_RI_LOCAL_INV; 726 err = build_inv_stag(wqe, wr, &len16); 727 break; 728 default: 729 PDBG("%s post of type=%d TBD!\n", __func__, 730 wr->opcode); 731 err = -EINVAL; 732 } 733 if (err) { 734 *bad_wr = wr; 735 break; 736 } 737 swsqe->idx = qhp->wq.sq.pidx; 738 swsqe->complete = 0; 739 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED); 740 swsqe->wr_id = wr->wr_id; 741 742 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 743 744 PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n", 745 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 746 swsqe->opcode, swsqe->read_len); 747 wr = wr->next; 748 num_wrs--; 749 t4_sq_produce(&qhp->wq, len16); 750 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 751 } 752 if (t4_wq_db_enabled(&qhp->wq)) 753 t4_ring_sq_db(&qhp->wq, idx); 754 spin_unlock_irqrestore(&qhp->lock, flag); 755 return err; 756 } 757 758 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, 759 struct ib_recv_wr **bad_wr) 760 { 761 int err = 0; 762 struct c4iw_qp *qhp; 763 union t4_recv_wr *wqe; 764 u32 num_wrs; 765 u8 len16 = 0; 766 unsigned long flag; 767 u16 idx = 0; 768 769 qhp = to_c4iw_qp(ibqp); 770 spin_lock_irqsave(&qhp->lock, flag); 771 if (t4_wq_in_error(&qhp->wq)) { 772 spin_unlock_irqrestore(&qhp->lock, flag); 773 return -EINVAL; 774 } 775 num_wrs = t4_rq_avail(&qhp->wq); 776 if (num_wrs == 0) { 777 spin_unlock_irqrestore(&qhp->lock, flag); 778 return -ENOMEM; 779 } 780 while (wr) { 781 if (wr->num_sge > T4_MAX_RECV_SGE) { 782 err = -EINVAL; 783 *bad_wr = wr; 784 break; 785 } 786 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 787 qhp->wq.rq.wq_pidx * 788 T4_EQ_ENTRY_SIZE); 789 if (num_wrs) 790 err = build_rdma_recv(qhp, wqe, wr, &len16); 791 else 792 err = -ENOMEM; 793 if (err) { 794 *bad_wr = wr; 795 break; 796 } 797 798 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 799 800 wqe->recv.opcode = FW_RI_RECV_WR; 801 wqe->recv.r1 = 0; 802 wqe->recv.wrid = qhp->wq.rq.pidx; 803 wqe->recv.r2[0] = 0; 804 wqe->recv.r2[1] = 0; 805 wqe->recv.r2[2] = 0; 806 wqe->recv.len16 = len16; 807 PDBG("%s cookie 0x%llx pidx %u\n", __func__, 808 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx); 809 t4_rq_produce(&qhp->wq, len16); 810 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 811 wr = wr->next; 812 num_wrs--; 813 } 814 if (t4_wq_db_enabled(&qhp->wq)) 815 t4_ring_rq_db(&qhp->wq, idx); 816 spin_unlock_irqrestore(&qhp->lock, flag); 817 return err; 818 } 819 820 int c4iw_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind) 821 { 822 return -ENOSYS; 823 } 824 825 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 826 u8 *ecode) 827 { 828 int status; 829 int tagged; 830 int opcode; 831 int rqtype; 832 int send_inv; 833 834 if (!err_cqe) { 835 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 836 *ecode = 0; 837 return; 838 } 839 840 status = CQE_STATUS(err_cqe); 841 opcode = CQE_OPCODE(err_cqe); 842 rqtype = RQ_TYPE(err_cqe); 843 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 844 (opcode == FW_RI_SEND_WITH_SE_INV); 845 tagged = (opcode == FW_RI_RDMA_WRITE) || 846 (rqtype && (opcode == FW_RI_READ_RESP)); 847 848 switch (status) { 849 case T4_ERR_STAG: 850 if (send_inv) { 851 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 852 *ecode = RDMAP_CANT_INV_STAG; 853 } else { 854 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 855 *ecode = RDMAP_INV_STAG; 856 } 857 break; 858 case T4_ERR_PDID: 859 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 860 if ((opcode == FW_RI_SEND_WITH_INV) || 861 (opcode == FW_RI_SEND_WITH_SE_INV)) 862 *ecode = RDMAP_CANT_INV_STAG; 863 else 864 *ecode = RDMAP_STAG_NOT_ASSOC; 865 break; 866 case T4_ERR_QPID: 867 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 868 *ecode = RDMAP_STAG_NOT_ASSOC; 869 break; 870 case T4_ERR_ACCESS: 871 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 872 *ecode = RDMAP_ACC_VIOL; 873 break; 874 case T4_ERR_WRAP: 875 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 876 *ecode = RDMAP_TO_WRAP; 877 break; 878 case T4_ERR_BOUND: 879 if (tagged) { 880 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 881 *ecode = DDPT_BASE_BOUNDS; 882 } else { 883 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 884 *ecode = RDMAP_BASE_BOUNDS; 885 } 886 break; 887 case T4_ERR_INVALIDATE_SHARED_MR: 888 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 889 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 890 *ecode = RDMAP_CANT_INV_STAG; 891 break; 892 case T4_ERR_ECC: 893 case T4_ERR_ECC_PSTAG: 894 case T4_ERR_INTERNAL_ERR: 895 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 896 *ecode = 0; 897 break; 898 case T4_ERR_OUT_OF_RQE: 899 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 900 *ecode = DDPU_INV_MSN_NOBUF; 901 break; 902 case T4_ERR_PBL_ADDR_BOUND: 903 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 904 *ecode = DDPT_BASE_BOUNDS; 905 break; 906 case T4_ERR_CRC: 907 *layer_type = LAYER_MPA|DDP_LLP; 908 *ecode = MPA_CRC_ERR; 909 break; 910 case T4_ERR_MARKER: 911 *layer_type = LAYER_MPA|DDP_LLP; 912 *ecode = MPA_MARKER_ERR; 913 break; 914 case T4_ERR_PDU_LEN_ERR: 915 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 916 *ecode = DDPU_MSG_TOOBIG; 917 break; 918 case T4_ERR_DDP_VERSION: 919 if (tagged) { 920 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 921 *ecode = DDPT_INV_VERS; 922 } else { 923 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 924 *ecode = DDPU_INV_VERS; 925 } 926 break; 927 case T4_ERR_RDMA_VERSION: 928 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 929 *ecode = RDMAP_INV_VERS; 930 break; 931 case T4_ERR_OPCODE: 932 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 933 *ecode = RDMAP_INV_OPCODE; 934 break; 935 case T4_ERR_DDP_QUEUE_NUM: 936 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 937 *ecode = DDPU_INV_QN; 938 break; 939 case T4_ERR_MSN: 940 case T4_ERR_MSN_GAP: 941 case T4_ERR_MSN_RANGE: 942 case T4_ERR_IRD_OVERFLOW: 943 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 944 *ecode = DDPU_INV_MSN_RANGE; 945 break; 946 case T4_ERR_TBIT: 947 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 948 *ecode = 0; 949 break; 950 case T4_ERR_MO: 951 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 952 *ecode = DDPU_INV_MO; 953 break; 954 default: 955 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 956 *ecode = 0; 957 break; 958 } 959 } 960 961 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 962 gfp_t gfp) 963 { 964 struct fw_ri_wr *wqe; 965 struct sk_buff *skb; 966 struct terminate_message *term; 967 968 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, 969 qhp->ep->hwtid); 970 971 skb = alloc_skb(sizeof *wqe, gfp); 972 if (!skb) 973 return; 974 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 975 976 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 977 memset(wqe, 0, sizeof *wqe); 978 wqe->op_compl = cpu_to_be32(FW_WR_OP(FW_RI_INIT_WR)); 979 wqe->flowid_len16 = cpu_to_be32( 980 FW_WR_FLOWID(qhp->ep->hwtid) | 981 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 982 983 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 984 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term); 985 term = (struct terminate_message *)wqe->u.terminate.termmsg; 986 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 987 term->layer_etype = qhp->attr.layer_etype; 988 term->ecode = qhp->attr.ecode; 989 } else 990 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 991 c4iw_ofld_send(&qhp->rhp->rdev, skb); 992 } 993 994 /* 995 * Assumes qhp lock is held. 996 */ 997 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 998 struct c4iw_cq *schp) 999 { 1000 int count; 1001 int flushed; 1002 unsigned long flag; 1003 1004 PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp); 1005 1006 /* locking hierarchy: cq lock first, then qp lock. */ 1007 spin_lock_irqsave(&rchp->lock, flag); 1008 spin_lock(&qhp->lock); 1009 c4iw_flush_hw_cq(&rchp->cq); 1010 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1011 flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1012 spin_unlock(&qhp->lock); 1013 spin_unlock_irqrestore(&rchp->lock, flag); 1014 if (flushed) { 1015 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1016 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1017 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1018 } 1019 1020 /* locking hierarchy: cq lock first, then qp lock. */ 1021 spin_lock_irqsave(&schp->lock, flag); 1022 spin_lock(&qhp->lock); 1023 c4iw_flush_hw_cq(&schp->cq); 1024 c4iw_count_scqes(&schp->cq, &qhp->wq, &count); 1025 flushed = c4iw_flush_sq(&qhp->wq, &schp->cq, count); 1026 spin_unlock(&qhp->lock); 1027 spin_unlock_irqrestore(&schp->lock, flag); 1028 if (flushed) { 1029 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1030 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context); 1031 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1032 } 1033 } 1034 1035 static void flush_qp(struct c4iw_qp *qhp) 1036 { 1037 struct c4iw_cq *rchp, *schp; 1038 unsigned long flag; 1039 1040 rchp = get_chp(qhp->rhp, qhp->attr.rcq); 1041 schp = get_chp(qhp->rhp, qhp->attr.scq); 1042 1043 if (qhp->ibqp.uobject) { 1044 t4_set_wq_in_error(&qhp->wq); 1045 t4_set_cq_in_error(&rchp->cq); 1046 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1047 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1048 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1049 if (schp != rchp) { 1050 t4_set_cq_in_error(&schp->cq); 1051 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1052 (*schp->ibcq.comp_handler)(&schp->ibcq, 1053 schp->ibcq.cq_context); 1054 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1055 } 1056 return; 1057 } 1058 __flush_qp(qhp, rchp, schp); 1059 } 1060 1061 static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1062 struct c4iw_ep *ep) 1063 { 1064 struct fw_ri_wr *wqe; 1065 int ret; 1066 struct sk_buff *skb; 1067 1068 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, 1069 ep->hwtid); 1070 1071 skb = alloc_skb(sizeof *wqe, GFP_KERNEL); 1072 if (!skb) 1073 return -ENOMEM; 1074 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1075 1076 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 1077 memset(wqe, 0, sizeof *wqe); 1078 wqe->op_compl = cpu_to_be32( 1079 FW_WR_OP(FW_RI_INIT_WR) | 1080 FW_WR_COMPL(1)); 1081 wqe->flowid_len16 = cpu_to_be32( 1082 FW_WR_FLOWID(ep->hwtid) | 1083 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1084 wqe->cookie = (unsigned long) &ep->com.wr_wait; 1085 1086 wqe->u.fini.type = FW_RI_TYPE_FINI; 1087 ret = c4iw_ofld_send(&rhp->rdev, skb); 1088 if (ret) 1089 goto out; 1090 1091 ret = c4iw_wait_for_reply(&rhp->rdev, &ep->com.wr_wait, qhp->ep->hwtid, 1092 qhp->wq.sq.qid, __func__); 1093 out: 1094 PDBG("%s ret %d\n", __func__, ret); 1095 return ret; 1096 } 1097 1098 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1099 { 1100 PDBG("%s p2p_type = %d\n", __func__, p2p_type); 1101 memset(&init->u, 0, sizeof init->u); 1102 switch (p2p_type) { 1103 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1104 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1105 init->u.write.stag_sink = cpu_to_be32(1); 1106 init->u.write.to_sink = cpu_to_be64(1); 1107 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1108 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write + 1109 sizeof(struct fw_ri_immd), 1110 16); 1111 break; 1112 case FW_RI_INIT_P2PTYPE_READ_REQ: 1113 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1114 init->u.read.stag_src = cpu_to_be32(1); 1115 init->u.read.to_src_lo = cpu_to_be32(1); 1116 init->u.read.stag_sink = cpu_to_be32(1); 1117 init->u.read.to_sink_lo = cpu_to_be32(1); 1118 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16); 1119 break; 1120 } 1121 } 1122 1123 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1124 { 1125 struct fw_ri_wr *wqe; 1126 int ret; 1127 struct sk_buff *skb; 1128 1129 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, 1130 qhp->ep->hwtid); 1131 1132 skb = alloc_skb(sizeof *wqe, GFP_KERNEL); 1133 if (!skb) 1134 return -ENOMEM; 1135 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1136 1137 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); 1138 memset(wqe, 0, sizeof *wqe); 1139 wqe->op_compl = cpu_to_be32( 1140 FW_WR_OP(FW_RI_INIT_WR) | 1141 FW_WR_COMPL(1)); 1142 wqe->flowid_len16 = cpu_to_be32( 1143 FW_WR_FLOWID(qhp->ep->hwtid) | 1144 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1145 1146 wqe->cookie = (unsigned long) &qhp->ep->com.wr_wait; 1147 1148 wqe->u.init.type = FW_RI_TYPE_INIT; 1149 wqe->u.init.mpareqbit_p2ptype = 1150 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) | 1151 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type); 1152 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1153 if (qhp->attr.mpa_attr.recv_marker_enabled) 1154 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1155 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1156 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1157 if (qhp->attr.mpa_attr.crc_enabled) 1158 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1159 1160 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1161 FW_RI_QP_RDMA_WRITE_ENABLE | 1162 FW_RI_QP_BIND_ENABLE; 1163 if (!qhp->ibqp.uobject) 1164 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1165 FW_RI_QP_STAG0_ENABLE; 1166 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1167 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1168 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1169 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1170 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1171 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1172 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1173 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1174 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1175 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq); 1176 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq); 1177 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1178 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1179 rhp->rdev.lldi.vr->rq.start); 1180 if (qhp->attr.mpa_attr.initiator) 1181 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1182 1183 ret = c4iw_ofld_send(&rhp->rdev, skb); 1184 if (ret) 1185 goto out; 1186 1187 ret = c4iw_wait_for_reply(&rhp->rdev, &qhp->ep->com.wr_wait, 1188 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1189 out: 1190 PDBG("%s ret %d\n", __func__, ret); 1191 return ret; 1192 } 1193 1194 /* 1195 * Called by the library when the qp has user dbs disabled due to 1196 * a DB_FULL condition. This function will single-thread all user 1197 * DB rings to avoid overflowing the hw db-fifo. 1198 */ 1199 static int ring_kernel_db(struct c4iw_qp *qhp, u32 qid, u16 inc) 1200 { 1201 int delay = db_delay_usecs; 1202 1203 mutex_lock(&qhp->rhp->db_mutex); 1204 do { 1205 1206 /* 1207 * The interrupt threshold is dbfifo_int_thresh << 6. So 1208 * make sure we don't cross that and generate an interrupt. 1209 */ 1210 if (cxgb4_dbfifo_count(qhp->rhp->rdev.lldi.ports[0], 1) < 1211 (qhp->rhp->rdev.lldi.dbfifo_int_thresh << 5)) { 1212 writel(QID(qid) | PIDX(inc), qhp->wq.db); 1213 break; 1214 } 1215 set_current_state(TASK_UNINTERRUPTIBLE); 1216 schedule_timeout(usecs_to_jiffies(delay)); 1217 delay = min(delay << 1, 2000); 1218 } while (1); 1219 mutex_unlock(&qhp->rhp->db_mutex); 1220 return 0; 1221 } 1222 1223 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1224 enum c4iw_qp_attr_mask mask, 1225 struct c4iw_qp_attributes *attrs, 1226 int internal) 1227 { 1228 int ret = 0; 1229 struct c4iw_qp_attributes newattr = qhp->attr; 1230 int disconnect = 0; 1231 int terminate = 0; 1232 int abort = 0; 1233 int free = 0; 1234 struct c4iw_ep *ep = NULL; 1235 1236 PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__, 1237 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state, 1238 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1239 1240 mutex_lock(&qhp->mutex); 1241 1242 /* Process attr changes if in IDLE */ 1243 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1244 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1245 ret = -EIO; 1246 goto out; 1247 } 1248 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1249 newattr.enable_rdma_read = attrs->enable_rdma_read; 1250 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1251 newattr.enable_rdma_write = attrs->enable_rdma_write; 1252 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1253 newattr.enable_bind = attrs->enable_bind; 1254 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1255 if (attrs->max_ord > c4iw_max_read_depth) { 1256 ret = -EINVAL; 1257 goto out; 1258 } 1259 newattr.max_ord = attrs->max_ord; 1260 } 1261 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1262 if (attrs->max_ird > c4iw_max_read_depth) { 1263 ret = -EINVAL; 1264 goto out; 1265 } 1266 newattr.max_ird = attrs->max_ird; 1267 } 1268 qhp->attr = newattr; 1269 } 1270 1271 if (mask & C4IW_QP_ATTR_SQ_DB) { 1272 ret = ring_kernel_db(qhp, qhp->wq.sq.qid, attrs->sq_db_inc); 1273 goto out; 1274 } 1275 if (mask & C4IW_QP_ATTR_RQ_DB) { 1276 ret = ring_kernel_db(qhp, qhp->wq.rq.qid, attrs->rq_db_inc); 1277 goto out; 1278 } 1279 1280 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1281 goto out; 1282 if (qhp->attr.state == attrs->next_state) 1283 goto out; 1284 1285 switch (qhp->attr.state) { 1286 case C4IW_QP_STATE_IDLE: 1287 switch (attrs->next_state) { 1288 case C4IW_QP_STATE_RTS: 1289 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1290 ret = -EINVAL; 1291 goto out; 1292 } 1293 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1294 ret = -EINVAL; 1295 goto out; 1296 } 1297 qhp->attr.mpa_attr = attrs->mpa_attr; 1298 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1299 qhp->ep = qhp->attr.llp_stream_handle; 1300 set_state(qhp, C4IW_QP_STATE_RTS); 1301 1302 /* 1303 * Ref the endpoint here and deref when we 1304 * disassociate the endpoint from the QP. This 1305 * happens in CLOSING->IDLE transition or *->ERROR 1306 * transition. 1307 */ 1308 c4iw_get_ep(&qhp->ep->com); 1309 ret = rdma_init(rhp, qhp); 1310 if (ret) 1311 goto err; 1312 break; 1313 case C4IW_QP_STATE_ERROR: 1314 set_state(qhp, C4IW_QP_STATE_ERROR); 1315 flush_qp(qhp); 1316 break; 1317 default: 1318 ret = -EINVAL; 1319 goto out; 1320 } 1321 break; 1322 case C4IW_QP_STATE_RTS: 1323 switch (attrs->next_state) { 1324 case C4IW_QP_STATE_CLOSING: 1325 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2); 1326 set_state(qhp, C4IW_QP_STATE_CLOSING); 1327 ep = qhp->ep; 1328 if (!internal) { 1329 abort = 0; 1330 disconnect = 1; 1331 c4iw_get_ep(&qhp->ep->com); 1332 } 1333 if (qhp->ibqp.uobject) 1334 t4_set_wq_in_error(&qhp->wq); 1335 ret = rdma_fini(rhp, qhp, ep); 1336 if (ret) 1337 goto err; 1338 break; 1339 case C4IW_QP_STATE_TERMINATE: 1340 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1341 qhp->attr.layer_etype = attrs->layer_etype; 1342 qhp->attr.ecode = attrs->ecode; 1343 if (qhp->ibqp.uobject) 1344 t4_set_wq_in_error(&qhp->wq); 1345 ep = qhp->ep; 1346 if (!internal) 1347 terminate = 1; 1348 disconnect = 1; 1349 c4iw_get_ep(&qhp->ep->com); 1350 break; 1351 case C4IW_QP_STATE_ERROR: 1352 set_state(qhp, C4IW_QP_STATE_ERROR); 1353 if (qhp->ibqp.uobject) 1354 t4_set_wq_in_error(&qhp->wq); 1355 if (!internal) { 1356 abort = 1; 1357 disconnect = 1; 1358 ep = qhp->ep; 1359 c4iw_get_ep(&qhp->ep->com); 1360 } 1361 goto err; 1362 break; 1363 default: 1364 ret = -EINVAL; 1365 goto out; 1366 } 1367 break; 1368 case C4IW_QP_STATE_CLOSING: 1369 if (!internal) { 1370 ret = -EINVAL; 1371 goto out; 1372 } 1373 switch (attrs->next_state) { 1374 case C4IW_QP_STATE_IDLE: 1375 flush_qp(qhp); 1376 set_state(qhp, C4IW_QP_STATE_IDLE); 1377 qhp->attr.llp_stream_handle = NULL; 1378 c4iw_put_ep(&qhp->ep->com); 1379 qhp->ep = NULL; 1380 wake_up(&qhp->wait); 1381 break; 1382 case C4IW_QP_STATE_ERROR: 1383 goto err; 1384 default: 1385 ret = -EINVAL; 1386 goto err; 1387 } 1388 break; 1389 case C4IW_QP_STATE_ERROR: 1390 if (attrs->next_state != C4IW_QP_STATE_IDLE) { 1391 ret = -EINVAL; 1392 goto out; 1393 } 1394 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { 1395 ret = -EINVAL; 1396 goto out; 1397 } 1398 set_state(qhp, C4IW_QP_STATE_IDLE); 1399 break; 1400 case C4IW_QP_STATE_TERMINATE: 1401 if (!internal) { 1402 ret = -EINVAL; 1403 goto out; 1404 } 1405 goto err; 1406 break; 1407 default: 1408 printk(KERN_ERR "%s in a bad state %d\n", 1409 __func__, qhp->attr.state); 1410 ret = -EINVAL; 1411 goto err; 1412 break; 1413 } 1414 goto out; 1415 err: 1416 PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep, 1417 qhp->wq.sq.qid); 1418 1419 /* disassociate the LLP connection */ 1420 qhp->attr.llp_stream_handle = NULL; 1421 if (!ep) 1422 ep = qhp->ep; 1423 qhp->ep = NULL; 1424 set_state(qhp, C4IW_QP_STATE_ERROR); 1425 free = 1; 1426 abort = 1; 1427 wake_up(&qhp->wait); 1428 BUG_ON(!ep); 1429 flush_qp(qhp); 1430 out: 1431 mutex_unlock(&qhp->mutex); 1432 1433 if (terminate) 1434 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); 1435 1436 /* 1437 * If disconnect is 1, then we need to initiate a disconnect 1438 * on the EP. This can be a normal close (RTS->CLOSING) or 1439 * an abnormal close (RTS/CLOSING->ERROR). 1440 */ 1441 if (disconnect) { 1442 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : 1443 GFP_KERNEL); 1444 c4iw_put_ep(&ep->com); 1445 } 1446 1447 /* 1448 * If free is 1, then we've disassociated the EP from the QP 1449 * and we need to dereference the EP. 1450 */ 1451 if (free) 1452 c4iw_put_ep(&ep->com); 1453 PDBG("%s exit state %d\n", __func__, qhp->attr.state); 1454 return ret; 1455 } 1456 1457 static int enable_qp_db(int id, void *p, void *data) 1458 { 1459 struct c4iw_qp *qp = p; 1460 1461 t4_enable_wq_db(&qp->wq); 1462 return 0; 1463 } 1464 1465 int c4iw_destroy_qp(struct ib_qp *ib_qp) 1466 { 1467 struct c4iw_dev *rhp; 1468 struct c4iw_qp *qhp; 1469 struct c4iw_qp_attributes attrs; 1470 struct c4iw_ucontext *ucontext; 1471 1472 qhp = to_c4iw_qp(ib_qp); 1473 rhp = qhp->rhp; 1474 1475 attrs.next_state = C4IW_QP_STATE_ERROR; 1476 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) 1477 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1478 else 1479 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1480 wait_event(qhp->wait, !qhp->ep); 1481 1482 spin_lock_irq(&rhp->lock); 1483 remove_handle_nolock(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1484 rhp->qpcnt--; 1485 BUG_ON(rhp->qpcnt < 0); 1486 if (rhp->qpcnt <= db_fc_threshold && rhp->db_state == FLOW_CONTROL) { 1487 rhp->rdev.stats.db_state_transitions++; 1488 rhp->db_state = NORMAL; 1489 idr_for_each(&rhp->qpidr, enable_qp_db, NULL); 1490 } 1491 if (db_coalescing_threshold >= 0) 1492 if (rhp->qpcnt <= db_coalescing_threshold) 1493 cxgb4_enable_db_coalescing(rhp->rdev.lldi.ports[0]); 1494 spin_unlock_irq(&rhp->lock); 1495 atomic_dec(&qhp->refcnt); 1496 wait_event(qhp->wait, !atomic_read(&qhp->refcnt)); 1497 1498 ucontext = ib_qp->uobject ? 1499 to_c4iw_ucontext(ib_qp->uobject->context) : NULL; 1500 destroy_qp(&rhp->rdev, &qhp->wq, 1501 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1502 1503 PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid); 1504 kfree(qhp); 1505 return 0; 1506 } 1507 1508 static int disable_qp_db(int id, void *p, void *data) 1509 { 1510 struct c4iw_qp *qp = p; 1511 1512 t4_disable_wq_db(&qp->wq); 1513 return 0; 1514 } 1515 1516 struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, 1517 struct ib_udata *udata) 1518 { 1519 struct c4iw_dev *rhp; 1520 struct c4iw_qp *qhp; 1521 struct c4iw_pd *php; 1522 struct c4iw_cq *schp; 1523 struct c4iw_cq *rchp; 1524 struct c4iw_create_qp_resp uresp; 1525 int sqsize, rqsize; 1526 struct c4iw_ucontext *ucontext; 1527 int ret; 1528 struct c4iw_mm_entry *mm1, *mm2, *mm3, *mm4, *mm5 = NULL; 1529 1530 PDBG("%s ib_pd %p\n", __func__, pd); 1531 1532 if (attrs->qp_type != IB_QPT_RC) 1533 return ERR_PTR(-EINVAL); 1534 1535 php = to_c4iw_pd(pd); 1536 rhp = php->rhp; 1537 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 1538 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 1539 if (!schp || !rchp) 1540 return ERR_PTR(-EINVAL); 1541 1542 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 1543 return ERR_PTR(-EINVAL); 1544 1545 rqsize = roundup(attrs->cap.max_recv_wr + 1, 16); 1546 if (rqsize > T4_MAX_RQ_SIZE) 1547 return ERR_PTR(-E2BIG); 1548 1549 sqsize = roundup(attrs->cap.max_send_wr + 1, 16); 1550 if (sqsize > T4_MAX_SQ_SIZE) 1551 return ERR_PTR(-E2BIG); 1552 1553 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL; 1554 1555 1556 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL); 1557 if (!qhp) 1558 return ERR_PTR(-ENOMEM); 1559 qhp->wq.sq.size = sqsize; 1560 qhp->wq.sq.memsize = (sqsize + 1) * sizeof *qhp->wq.sq.queue; 1561 qhp->wq.rq.size = rqsize; 1562 qhp->wq.rq.memsize = (rqsize + 1) * sizeof *qhp->wq.rq.queue; 1563 1564 if (ucontext) { 1565 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 1566 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE); 1567 } 1568 1569 PDBG("%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu\n", 1570 __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize); 1571 1572 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 1573 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1574 if (ret) 1575 goto err1; 1576 1577 attrs->cap.max_recv_wr = rqsize - 1; 1578 attrs->cap.max_send_wr = sqsize - 1; 1579 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 1580 1581 qhp->rhp = rhp; 1582 qhp->attr.pd = php->pdid; 1583 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 1584 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 1585 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 1586 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 1587 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 1588 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 1589 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 1590 qhp->attr.state = C4IW_QP_STATE_IDLE; 1591 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 1592 qhp->attr.enable_rdma_read = 1; 1593 qhp->attr.enable_rdma_write = 1; 1594 qhp->attr.enable_bind = 1; 1595 qhp->attr.max_ord = 1; 1596 qhp->attr.max_ird = 1; 1597 spin_lock_init(&qhp->lock); 1598 mutex_init(&qhp->mutex); 1599 init_waitqueue_head(&qhp->wait); 1600 atomic_set(&qhp->refcnt, 1); 1601 1602 spin_lock_irq(&rhp->lock); 1603 if (rhp->db_state != NORMAL) 1604 t4_disable_wq_db(&qhp->wq); 1605 rhp->qpcnt++; 1606 if (rhp->qpcnt > db_fc_threshold && rhp->db_state == NORMAL) { 1607 rhp->rdev.stats.db_state_transitions++; 1608 rhp->db_state = FLOW_CONTROL; 1609 idr_for_each(&rhp->qpidr, disable_qp_db, NULL); 1610 } 1611 if (db_coalescing_threshold >= 0) 1612 if (rhp->qpcnt > db_coalescing_threshold) 1613 cxgb4_disable_db_coalescing(rhp->rdev.lldi.ports[0]); 1614 ret = insert_handle_nolock(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); 1615 spin_unlock_irq(&rhp->lock); 1616 if (ret) 1617 goto err2; 1618 1619 if (udata) { 1620 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL); 1621 if (!mm1) { 1622 ret = -ENOMEM; 1623 goto err3; 1624 } 1625 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL); 1626 if (!mm2) { 1627 ret = -ENOMEM; 1628 goto err4; 1629 } 1630 mm3 = kmalloc(sizeof *mm3, GFP_KERNEL); 1631 if (!mm3) { 1632 ret = -ENOMEM; 1633 goto err5; 1634 } 1635 mm4 = kmalloc(sizeof *mm4, GFP_KERNEL); 1636 if (!mm4) { 1637 ret = -ENOMEM; 1638 goto err6; 1639 } 1640 if (t4_sq_onchip(&qhp->wq.sq)) { 1641 mm5 = kmalloc(sizeof *mm5, GFP_KERNEL); 1642 if (!mm5) { 1643 ret = -ENOMEM; 1644 goto err7; 1645 } 1646 uresp.flags = C4IW_QPF_ONCHIP; 1647 } else 1648 uresp.flags = 0; 1649 uresp.qid_mask = rhp->rdev.qpmask; 1650 uresp.sqid = qhp->wq.sq.qid; 1651 uresp.sq_size = qhp->wq.sq.size; 1652 uresp.sq_memsize = qhp->wq.sq.memsize; 1653 uresp.rqid = qhp->wq.rq.qid; 1654 uresp.rq_size = qhp->wq.rq.size; 1655 uresp.rq_memsize = qhp->wq.rq.memsize; 1656 spin_lock(&ucontext->mmap_lock); 1657 if (mm5) { 1658 uresp.ma_sync_key = ucontext->key; 1659 ucontext->key += PAGE_SIZE; 1660 } 1661 uresp.sq_key = ucontext->key; 1662 ucontext->key += PAGE_SIZE; 1663 uresp.rq_key = ucontext->key; 1664 ucontext->key += PAGE_SIZE; 1665 uresp.sq_db_gts_key = ucontext->key; 1666 ucontext->key += PAGE_SIZE; 1667 uresp.rq_db_gts_key = ucontext->key; 1668 ucontext->key += PAGE_SIZE; 1669 spin_unlock(&ucontext->mmap_lock); 1670 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp); 1671 if (ret) 1672 goto err8; 1673 mm1->key = uresp.sq_key; 1674 mm1->addr = qhp->wq.sq.phys_addr; 1675 mm1->len = PAGE_ALIGN(qhp->wq.sq.memsize); 1676 insert_mmap(ucontext, mm1); 1677 mm2->key = uresp.rq_key; 1678 mm2->addr = virt_to_phys(qhp->wq.rq.queue); 1679 mm2->len = PAGE_ALIGN(qhp->wq.rq.memsize); 1680 insert_mmap(ucontext, mm2); 1681 mm3->key = uresp.sq_db_gts_key; 1682 mm3->addr = qhp->wq.sq.udb; 1683 mm3->len = PAGE_SIZE; 1684 insert_mmap(ucontext, mm3); 1685 mm4->key = uresp.rq_db_gts_key; 1686 mm4->addr = qhp->wq.rq.udb; 1687 mm4->len = PAGE_SIZE; 1688 insert_mmap(ucontext, mm4); 1689 if (mm5) { 1690 mm5->key = uresp.ma_sync_key; 1691 mm5->addr = (pci_resource_start(rhp->rdev.lldi.pdev, 0) 1692 + A_PCIE_MA_SYNC) & PAGE_MASK; 1693 mm5->len = PAGE_SIZE; 1694 insert_mmap(ucontext, mm5); 1695 } 1696 } 1697 qhp->ibqp.qp_num = qhp->wq.sq.qid; 1698 init_timer(&(qhp->timer)); 1699 PDBG("%s qhp %p sq_num_entries %d, rq_num_entries %d qpid 0x%0x\n", 1700 __func__, qhp, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries, 1701 qhp->wq.sq.qid); 1702 return &qhp->ibqp; 1703 err8: 1704 kfree(mm5); 1705 err7: 1706 kfree(mm4); 1707 err6: 1708 kfree(mm3); 1709 err5: 1710 kfree(mm2); 1711 err4: 1712 kfree(mm1); 1713 err3: 1714 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1715 err2: 1716 destroy_qp(&rhp->rdev, &qhp->wq, 1717 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1718 err1: 1719 kfree(qhp); 1720 return ERR_PTR(ret); 1721 } 1722 1723 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1724 int attr_mask, struct ib_udata *udata) 1725 { 1726 struct c4iw_dev *rhp; 1727 struct c4iw_qp *qhp; 1728 enum c4iw_qp_attr_mask mask = 0; 1729 struct c4iw_qp_attributes attrs; 1730 1731 PDBG("%s ib_qp %p\n", __func__, ibqp); 1732 1733 /* iwarp does not support the RTR state */ 1734 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 1735 attr_mask &= ~IB_QP_STATE; 1736 1737 /* Make sure we still have something left to do */ 1738 if (!attr_mask) 1739 return 0; 1740 1741 memset(&attrs, 0, sizeof attrs); 1742 qhp = to_c4iw_qp(ibqp); 1743 rhp = qhp->rhp; 1744 1745 attrs.next_state = c4iw_convert_state(attr->qp_state); 1746 attrs.enable_rdma_read = (attr->qp_access_flags & 1747 IB_ACCESS_REMOTE_READ) ? 1 : 0; 1748 attrs.enable_rdma_write = (attr->qp_access_flags & 1749 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 1750 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 1751 1752 1753 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 1754 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 1755 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 1756 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 1757 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 1758 1759 /* 1760 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for 1761 * ringing the queue db when we're in DB_FULL mode. 1762 */ 1763 attrs.sq_db_inc = attr->sq_psn; 1764 attrs.rq_db_inc = attr->rq_psn; 1765 mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0; 1766 mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0; 1767 1768 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 1769 } 1770 1771 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 1772 { 1773 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn); 1774 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 1775 } 1776 1777 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1778 int attr_mask, struct ib_qp_init_attr *init_attr) 1779 { 1780 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 1781 1782 memset(attr, 0, sizeof *attr); 1783 memset(init_attr, 0, sizeof *init_attr); 1784 attr->qp_state = to_ib_qp_state(qhp->attr.state); 1785 return 0; 1786 } 1787