| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Steve Wise | 10694 | 61.30% | 46 | 35.11% |
| Raju Rangoju | 3231 | 18.52% | 3 | 2.29% |
| Bharat Potnuri | 1206 | 6.91% | 8 | 6.11% |
| Hariprasad Shenai | 799 | 4.58% | 15 | 11.45% |
| Sagi Grimberg | 548 | 3.14% | 1 | 0.76% |
| Vipul Pandya | 230 | 1.32% | 9 | 6.87% |
| Kumar Sanghvi | 205 | 1.18% | 3 | 2.29% |
| Leon Romanovsky | 98 | 0.56% | 5 | 3.82% |
| Nirranjan Kirubaharan | 63 | 0.36% | 1 | 0.76% |
| Emil Goode | 50 | 0.29% | 1 | 0.76% |
| Thadeu Lima de Souza Cascardo | 46 | 0.26% | 1 | 0.76% |
| Matthew Wilcox | 35 | 0.20% | 1 | 0.76% |
| shamir rabinovitch | 24 | 0.14% | 2 | 1.53% |
| Roland Dreier | 23 | 0.13% | 1 | 0.76% |
| Jason Gunthorpe | 22 | 0.13% | 3 | 2.29% |
| Joe Perches | 22 | 0.13% | 2 | 1.53% |
| Bart Van Assche | 20 | 0.11% | 3 | 2.29% |
| Christoph Hellwig | 19 | 0.11% | 2 | 1.53% |
| Kamal Heib | 15 | 0.09% | 3 | 2.29% |
| Dan Carpenter | 13 | 0.07% | 2 | 1.53% |
| Kees Cook | 10 | 0.06% | 1 | 0.76% |
| Tom Tucker | 9 | 0.05% | 1 | 0.76% |
| Krishnamraju Eraparaju | 8 | 0.05% | 1 | 0.76% |
| Arnd Bergmann | 8 | 0.05% | 1 | 0.76% |
| Wei Yongjun | 7 | 0.04% | 1 | 0.76% |
| Jiapeng Chong | 5 | 0.03% | 1 | 0.76% |
| Bryan Tan | 5 | 0.03% | 1 | 0.76% |
| Ganesh Goudar | 4 | 0.02% | 1 | 0.76% |
| Dimitris Michailidis | 4 | 0.02% | 1 | 0.76% |
| FUJITA Tomonori | 4 | 0.02% | 1 | 0.76% |
| Nathan Chancellor | 3 | 0.02% | 1 | 0.76% |
| Paul Gortmaker | 3 | 0.02% | 1 | 0.76% |
| Ariel Levkovich | 3 | 0.02% | 1 | 0.76% |
| Yue haibing | 3 | 0.02% | 1 | 0.76% |
| Roel Kluin | 2 | 0.01% | 1 | 0.76% |
| Gustavo A. R. Silva | 2 | 0.01% | 1 | 0.76% |
| yuan linyu | 1 | 0.01% | 1 | 0.76% |
| Colin Ian King | 1 | 0.01% | 1 | 0.76% |
| Luis R. Rodriguez | 1 | 0.01% | 1 | 0.76% |
| Total | 17446 | 131 |
/* * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/module.h> #include <rdma/uverbs_ioctl.h> #include "iw_cxgb4.h" static int db_delay_usecs = 1; module_param(db_delay_usecs, int, 0644); MODULE_PARM_DESC(db_delay_usecs, "Usecs to delay awaiting db fifo to drain"); static int ocqp_support = 1; module_param(ocqp_support, int, 0644); MODULE_PARM_DESC(ocqp_support, "Support on-chip SQs (default=1)"); int db_fc_threshold = 1000; module_param(db_fc_threshold, int, 0644); MODULE_PARM_DESC(db_fc_threshold, "QP count/threshold that triggers" " automatic db flow control mode (default = 1000)"); int db_coalescing_threshold; module_param(db_coalescing_threshold, int, 0644); MODULE_PARM_DESC(db_coalescing_threshold, "QP count/threshold that triggers" " disabling db coalescing (default = 0)"); static int max_fr_immd = T4_MAX_FR_IMMD; module_param(max_fr_immd, int, 0644); MODULE_PARM_DESC(max_fr_immd, "fastreg threshold for using DSGL instead of immediate"); static int alloc_ird(struct c4iw_dev *dev, u32 ird) { int ret = 0; xa_lock_irq(&dev->qps); if (ird <= dev->avail_ird) dev->avail_ird -= ird; else ret = -ENOMEM; xa_unlock_irq(&dev->qps); if (ret) dev_warn(&dev->rdev.lldi.pdev->dev, "device IRD resources exhausted\n"); return ret; } static void free_ird(struct c4iw_dev *dev, int ird) { xa_lock_irq(&dev->qps); dev->avail_ird += ird; xa_unlock_irq(&dev->qps); } static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) { unsigned long flag; spin_lock_irqsave(&qhp->lock, flag); qhp->attr.state = state; spin_unlock_irqrestore(&qhp->lock, flag); } static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) { c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize); } static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) { dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue, dma_unmap_addr(sq, mapping)); } static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) { if (t4_sq_onchip(sq)) dealloc_oc_sq(rdev, sq); else dealloc_host_sq(rdev, sq); } static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) { if (!ocqp_support || !ocqp_supported(&rdev->lldi)) return -ENOSYS; sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize); if (!sq->dma_addr) return -ENOMEM; sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr - rdev->lldi.vr->ocq.start; sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr - rdev->lldi.vr->ocq.start); sq->flags |= T4_SQ_ONCHIP; return 0; } static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) { sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize, &(sq->dma_addr), GFP_KERNEL); if (!sq->queue) return -ENOMEM; sq->phys_addr = virt_to_phys(sq->queue); dma_unmap_addr_set(sq, mapping, sq->dma_addr); return 0; } static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user) { int ret = -ENOSYS; if (user) ret = alloc_oc_sq(rdev, sq); if (ret) ret = alloc_host_sq(rdev, sq); return ret; } static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, struct c4iw_dev_ucontext *uctx, int has_rq) { /* * uP clears EQ contexts when the connection exits rdma mode, * so no need to post a RESET WR for these EQs. */ dealloc_sq(rdev, &wq->sq); kfree(wq->sq.sw_sq); c4iw_put_qpid(rdev, wq->sq.qid, uctx); if (has_rq) { dma_free_coherent(&rdev->lldi.pdev->dev, wq->rq.memsize, wq->rq.queue, dma_unmap_addr(&wq->rq, mapping)); c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); kfree(wq->rq.sw_rq); c4iw_put_qpid(rdev, wq->rq.qid, uctx); } return 0; } /* * Determine the BAR2 virtual address and qid. If pbar2_pa is not NULL, * then this is a user mapping so compute the page-aligned physical address * for mapping. */ void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid, enum cxgb4_bar2_qtype qtype, unsigned int *pbar2_qid, u64 *pbar2_pa) { u64 bar2_qoffset; int ret; ret = cxgb4_bar2_sge_qregs(rdev->lldi.ports[0], qid, qtype, pbar2_pa ? 1 : 0, &bar2_qoffset, pbar2_qid); if (ret) return NULL; if (pbar2_pa) *pbar2_pa = (rdev->bar2_pa + bar2_qoffset) & PAGE_MASK; if (is_t4(rdev->lldi.adapter_type)) return NULL; return rdev->bar2_kva + bar2_qoffset; } static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, struct t4_cq *rcq, struct t4_cq *scq, struct c4iw_dev_ucontext *uctx, struct c4iw_wr_wait *wr_waitp, int need_rq) { int user = (uctx != &rdev->uctx); struct fw_ri_res_wr *res_wr; struct fw_ri_res *res; int wr_len; struct sk_buff *skb; int ret = 0; int eqsize; wq->sq.qid = c4iw_get_qpid(rdev, uctx); if (!wq->sq.qid) return -ENOMEM; if (need_rq) { wq->rq.qid = c4iw_get_qpid(rdev, uctx); if (!wq->rq.qid) { ret = -ENOMEM; goto free_sq_qid; } } if (!user) { wq->sq.sw_sq = kcalloc(wq->sq.size, sizeof(*wq->sq.sw_sq), GFP_KERNEL); if (!wq->sq.sw_sq) { ret = -ENOMEM; goto free_rq_qid;//FIXME } if (need_rq) { wq->rq.sw_rq = kcalloc(wq->rq.size, sizeof(*wq->rq.sw_rq), GFP_KERNEL); if (!wq->rq.sw_rq) { ret = -ENOMEM; goto free_sw_sq; } } } if (need_rq) { /* * RQT must be a power of 2 and at least 16 deep. */ wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16)); wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); if (!wq->rq.rqt_hwaddr) { ret = -ENOMEM; goto free_sw_rq; } } ret = alloc_sq(rdev, &wq->sq, user); if (ret) goto free_hwaddr; memset(wq->sq.queue, 0, wq->sq.memsize); dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); if (need_rq) { wq->rq.queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, wq->rq.memsize, &wq->rq.dma_addr, GFP_KERNEL); if (!wq->rq.queue) { ret = -ENOMEM; goto free_sq; } pr_debug("sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n", wq->sq.queue, (unsigned long long)virt_to_phys(wq->sq.queue), wq->rq.queue, (unsigned long long)virt_to_phys(wq->rq.queue)); dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); } wq->db = rdev->lldi.db_reg; wq->sq.bar2_va = c4iw_bar2_addrs(rdev, wq->sq.qid, CXGB4_BAR2_QTYPE_EGRESS, &wq->sq.bar2_qid, user ? &wq->sq.bar2_pa : NULL); if (need_rq) wq->rq.bar2_va = c4iw_bar2_addrs(rdev, wq->rq.qid, CXGB4_BAR2_QTYPE_EGRESS, &wq->rq.bar2_qid, user ? &wq->rq.bar2_pa : NULL); /* * User mode must have bar2 access. */ if (user && (!wq->sq.bar2_pa || (need_rq && !wq->rq.bar2_pa))) { pr_warn("%s: sqid %u or rqid %u not in BAR2 range\n", pci_name(rdev->lldi.pdev), wq->sq.qid, wq->rq.qid); ret = -EINVAL; goto free_dma; } wq->rdev = rdev; wq->rq.msn = 1; /* build fw_ri_res_wr */ wr_len = sizeof(*res_wr) + 2 * sizeof(*res); if (need_rq) wr_len += sizeof(*res); skb = alloc_skb(wr_len, GFP_KERNEL); if (!skb) { ret = -ENOMEM; goto free_dma; } set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); res_wr = __skb_put_zero(skb, wr_len); res_wr->op_nres = cpu_to_be32( FW_WR_OP_V(FW_RI_RES_WR) | FW_RI_RES_WR_NRES_V(need_rq ? 2 : 1) | FW_WR_COMPL_F); res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); res_wr->cookie = (uintptr_t)wr_waitp; res = res_wr->res; res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; res->u.sqrq.op = FW_RI_RES_OP_WRITE; /* * eqsize is the number of 64B entries plus the status page size. */ eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + rdev->hw_queue.t4_eq_status_entries; res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( FW_RI_RES_WR_HOSTFCMODE_V(0) | /* no host cidx updates */ FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_ONCHIP_F : 0) | FW_RI_RES_WR_IQID_V(scq->cqid)); res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( FW_RI_RES_WR_DCAEN_V(0) | FW_RI_RES_WR_DCACPU_V(0) | FW_RI_RES_WR_FBMIN_V(2) | (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_FBMAX_V(2) : FW_RI_RES_WR_FBMAX_V(3)) | FW_RI_RES_WR_CIDXFTHRESHO_V(0) | FW_RI_RES_WR_CIDXFTHRESH_V(0) | FW_RI_RES_WR_EQSIZE_V(eqsize)); res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); if (need_rq) { res++; res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; res->u.sqrq.op = FW_RI_RES_OP_WRITE; /* * eqsize is the number of 64B entries plus the status page size */ eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + rdev->hw_queue.t4_eq_status_entries; res->u.sqrq.fetchszm_to_iqid = /* no host cidx updates */ cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | /* don't keep in chip cache */ FW_RI_RES_WR_CPRIO_V(0) | /* set by uP at ri_init time */ FW_RI_RES_WR_PCIECHN_V(0) | FW_RI_RES_WR_IQID_V(rcq->cqid)); res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | FW_RI_RES_WR_DCACPU_V(0) | FW_RI_RES_WR_FBMIN_V(2) | FW_RI_RES_WR_FBMAX_V(3) | FW_RI_RES_WR_CIDXFTHRESHO_V(0) | FW_RI_RES_WR_CIDXFTHRESH_V(0) | FW_RI_RES_WR_EQSIZE_V(eqsize)); res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); } c4iw_init_wr_wait(wr_waitp); ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->sq.qid, __func__); if (ret) goto free_dma; pr_debug("sqid 0x%x rqid 0x%x kdb 0x%p sq_bar2_addr %p rq_bar2_addr %p\n", wq->sq.qid, wq->rq.qid, wq->db, wq->sq.bar2_va, wq->rq.bar2_va); return 0; free_dma: if (need_rq) dma_free_coherent(&rdev->lldi.pdev->dev, wq->rq.memsize, wq->rq.queue, dma_unmap_addr(&wq->rq, mapping)); free_sq: dealloc_sq(rdev, &wq->sq); free_hwaddr: if (need_rq) c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); free_sw_rq: if (need_rq) kfree(wq->rq.sw_rq); free_sw_sq: kfree(wq->sq.sw_sq); free_rq_qid: if (need_rq) c4iw_put_qpid(rdev, wq->rq.qid, uctx); free_sq_qid: c4iw_put_qpid(rdev, wq->sq.qid, uctx); return ret; } static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, const struct ib_send_wr *wr, int max, u32 *plenp) { u8 *dstp, *srcp; u32 plen = 0; int i; int rem, len; dstp = (u8 *)immdp->data; for (i = 0; i < wr->num_sge; i++) { if ((plen + wr->sg_list[i].length) > max) return -EMSGSIZE; srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; plen += wr->sg_list[i].length; rem = wr->sg_list[i].length; while (rem) { if (dstp == (u8 *)&sq->queue[sq->size]) dstp = (u8 *)sq->queue; if (rem <= (u8 *)&sq->queue[sq->size] - dstp) len = rem; else len = (u8 *)&sq->queue[sq->size] - dstp; memcpy(dstp, srcp, len); dstp += len; srcp += len; rem -= len; } } len = roundup(plen + sizeof(*immdp), 16) - (plen + sizeof(*immdp)); if (len) memset(dstp, 0, len); immdp->op = FW_RI_DATA_IMMD; immdp->r1 = 0; immdp->r2 = 0; immdp->immdlen = cpu_to_be32(plen); *plenp = plen; return 0; } static int build_isgl(__be64 *queue_start, __be64 *queue_end, struct fw_ri_isgl *isglp, struct ib_sge *sg_list, int num_sge, u32 *plenp) { int i; u32 plen = 0; __be64 *flitp; if ((__be64 *)isglp == queue_end) isglp = (struct fw_ri_isgl *)queue_start; flitp = (__be64 *)isglp->sge; for (i = 0; i < num_sge; i++) { if ((plen + sg_list[i].length) < plen) return -EMSGSIZE; plen += sg_list[i].length; *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | sg_list[i].length); if (++flitp == queue_end) flitp = queue_start; *flitp = cpu_to_be64(sg_list[i].addr); if (++flitp == queue_end) flitp = queue_start; } *flitp = (__force __be64)0; isglp->op = FW_RI_DATA_ISGL; isglp->r1 = 0; isglp->nsge = cpu_to_be16(num_sge); isglp->r2 = 0; if (plenp) *plenp = plen; return 0; } static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, const struct ib_send_wr *wr, u8 *len16) { u32 plen; int size; int ret; if (wr->num_sge > T4_MAX_SEND_SGE) return -EINVAL; switch (wr->opcode) { case IB_WR_SEND: if (wr->send_flags & IB_SEND_SOLICITED) wqe->send.sendop_pkd = cpu_to_be32( FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE)); else wqe->send.sendop_pkd = cpu_to_be32( FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND)); wqe->send.stag_inv = 0; break; case IB_WR_SEND_WITH_INV: if (wr->send_flags & IB_SEND_SOLICITED) wqe->send.sendop_pkd = cpu_to_be32( FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE_INV)); else wqe->send.sendop_pkd = cpu_to_be32( FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_INV)); wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); break; default: return -EINVAL; } wqe->send.r3 = 0; wqe->send.r4 = 0; plen = 0; if (wr->num_sge) { if (wr->send_flags & IB_SEND_INLINE) { ret = build_immd(sq, wqe->send.u.immd_src, wr, T4_MAX_SEND_INLINE, &plen); if (ret) return ret; size = sizeof(wqe->send) + sizeof(struct fw_ri_immd) + plen; } else { ret = build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], wqe->send.u.isgl_src, wr->sg_list, wr->num_sge, &plen); if (ret) return ret; size = sizeof(wqe->send) + sizeof(struct fw_ri_isgl) + wr->num_sge * sizeof(struct fw_ri_sge); } } else { wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; wqe->send.u.immd_src[0].r1 = 0; wqe->send.u.immd_src[0].r2 = 0; wqe->send.u.immd_src[0].immdlen = 0; size = sizeof(wqe->send) + sizeof(struct fw_ri_immd); plen = 0; } *len16 = DIV_ROUND_UP(size, 16); wqe->send.plen = cpu_to_be32(plen); return 0; } static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, const struct ib_send_wr *wr, u8 *len16) { u32 plen; int size; int ret; if (wr->num_sge > T4_MAX_SEND_SGE) return -EINVAL; /* * iWARP protocol supports 64 bit immediate data but rdma api * limits it to 32bit. */ if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) wqe->write.iw_imm_data.ib_imm_data.imm_data32 = wr->ex.imm_data; else wqe->write.iw_imm_data.ib_imm_data.imm_data32 = 0; wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); if (wr->num_sge) { if (wr->send_flags & IB_SEND_INLINE) { ret = build_immd(sq, wqe->write.u.immd_src, wr, T4_MAX_WRITE_INLINE, &plen); if (ret) return ret; size = sizeof(wqe->write) + sizeof(struct fw_ri_immd) + plen; } else { ret = build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], wqe->write.u.isgl_src, wr->sg_list, wr->num_sge, &plen); if (ret) return ret; size = sizeof(wqe->write) + sizeof(struct fw_ri_isgl) + wr->num_sge * sizeof(struct fw_ri_sge); } } else { wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; wqe->write.u.immd_src[0].r1 = 0; wqe->write.u.immd_src[0].r2 = 0; wqe->write.u.immd_src[0].immdlen = 0; size = sizeof(wqe->write) + sizeof(struct fw_ri_immd); plen = 0; } *len16 = DIV_ROUND_UP(size, 16); wqe->write.plen = cpu_to_be32(plen); return 0; } static void build_immd_cmpl(struct t4_sq *sq, struct fw_ri_immd_cmpl *immdp, struct ib_send_wr *wr) { memcpy((u8 *)immdp->data, (u8 *)(uintptr_t)wr->sg_list->addr, 16); memset(immdp->r1, 0, 6); immdp->op = FW_RI_DATA_IMMD; immdp->immdlen = 16; } static void build_rdma_write_cmpl(struct t4_sq *sq, struct fw_ri_rdma_write_cmpl_wr *wcwr, const struct ib_send_wr *wr, u8 *len16) { u32 plen; int size; /* * This code assumes the struct fields preceding the write isgl * fit in one 64B WR slot. This is because the WQE is built * directly in the dma queue, and wrapping is only handled * by the code buildling sgls. IE the "fixed part" of the wr * structs must all fit in 64B. The WQE build code should probably be * redesigned to avoid this restriction, but for now just add * the BUILD_BUG_ON() to catch if this WQE struct gets too big. */ BUILD_BUG_ON(offsetof(struct fw_ri_rdma_write_cmpl_wr, u) > 64); wcwr->stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); wcwr->to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); if (wr->next->opcode == IB_WR_SEND) wcwr->stag_inv = 0; else wcwr->stag_inv = cpu_to_be32(wr->next->ex.invalidate_rkey); wcwr->r2 = 0; wcwr->r3 = 0; /* SEND_INV SGL */ if (wr->next->send_flags & IB_SEND_INLINE) build_immd_cmpl(sq, &wcwr->u_cmpl.immd_src, wr->next); else build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], &wcwr->u_cmpl.isgl_src, wr->next->sg_list, 1, NULL); /* WRITE SGL */ build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], wcwr->u.isgl_src, wr->sg_list, wr->num_sge, &plen); size = sizeof(*wcwr) + sizeof(struct fw_ri_isgl) + wr->num_sge * sizeof(struct fw_ri_sge); wcwr->plen = cpu_to_be32(plen); *len16 = DIV_ROUND_UP(size, 16); } static int build_rdma_read(union t4_wr *wqe, const struct ib_send_wr *wr, u8 *len16) { if (wr->num_sge > 1) return -EINVAL; if (wr->num_sge && wr->sg_list[0].length) { wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr >> 32)); wqe->read.to_src_lo = cpu_to_be32((u32)rdma_wr(wr)->remote_addr); wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr >> 32)); wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); } else { wqe->read.stag_src = cpu_to_be32(2); wqe->read.to_src_hi = 0; wqe->read.to_src_lo = 0; wqe->read.stag_sink = cpu_to_be32(2); wqe->read.plen = 0; wqe->read.to_sink_hi = 0; wqe->read.to_sink_lo = 0; } wqe->read.r2 = 0; wqe->read.r5 = 0; *len16 = DIV_ROUND_UP(sizeof(wqe->read), 16); return 0; } static void post_write_cmpl(struct c4iw_qp *qhp, const struct ib_send_wr *wr) { bool send_signaled = (wr->next->send_flags & IB_SEND_SIGNALED) || qhp->sq_sig_all; bool write_signaled = (wr->send_flags & IB_SEND_SIGNALED) || qhp->sq_sig_all; struct t4_swsqe *swsqe; union t4_wr *wqe; u16 write_wrid; u8 len16; u16 idx; /* * The sw_sq entries still look like a WRITE and a SEND and consume * 2 slots. The FW WR, however, will be a single uber-WR. */ wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); build_rdma_write_cmpl(&qhp->wq.sq, &wqe->write_cmpl, wr, &len16); /* WRITE swsqe */ swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; swsqe->opcode = FW_RI_RDMA_WRITE; swsqe->idx = qhp->wq.sq.pidx; swsqe->complete = 0; swsqe->signaled = write_signaled; swsqe->flushed = 0; swsqe->wr_id = wr->wr_id; if (c4iw_wr_log) { swsqe->sge_ts = cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); swsqe->host_time = ktime_get(); } write_wrid = qhp->wq.sq.pidx; /* just bump the sw_sq */ qhp->wq.sq.in_use++; if (++qhp->wq.sq.pidx == qhp->wq.sq.size) qhp->wq.sq.pidx = 0; /* SEND_WITH_INV swsqe */ swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; if (wr->next->opcode == IB_WR_SEND) swsqe->opcode = FW_RI_SEND; else swsqe->opcode = FW_RI_SEND_WITH_INV; swsqe->idx = qhp->wq.sq.pidx; swsqe->complete = 0; swsqe->signaled = send_signaled; swsqe->flushed = 0; swsqe->wr_id = wr->next->wr_id; if (c4iw_wr_log) { swsqe->sge_ts = cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); swsqe->host_time = ktime_get(); } wqe->write_cmpl.flags_send = send_signaled ? FW_RI_COMPLETION_FLAG : 0; wqe->write_cmpl.wrid_send = qhp->wq.sq.pidx; init_wr_hdr(wqe, write_wrid, FW_RI_RDMA_WRITE_CMPL_WR, write_signaled ? FW_RI_COMPLETION_FLAG : 0, len16); t4_sq_produce(&qhp->wq, len16); idx = DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); t4_ring_sq_db(&qhp->wq, idx, wqe); } static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, const struct ib_recv_wr *wr, u8 *len16) { int ret; ret = build_isgl((__be64 *)qhp->wq.rq.queue, (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); if (ret) return ret; *len16 = DIV_ROUND_UP( sizeof(wqe->recv) + wr->num_sge * sizeof(struct fw_ri_sge), 16); return 0; } static int build_srq_recv(union t4_recv_wr *wqe, const struct ib_recv_wr *wr, u8 *len16) { int ret; ret = build_isgl((__be64 *)wqe, (__be64 *)(wqe + 1), &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); if (ret) return ret; *len16 = DIV_ROUND_UP(sizeof(wqe->recv) + wr->num_sge * sizeof(struct fw_ri_sge), 16); return 0; } static void build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr, const struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16) { __be64 *p = (__be64 *)fr->pbl; fr->r2 = cpu_to_be32(0); fr->stag = cpu_to_be32(mhp->ibmr.rkey); fr->tpte.valid_to_pdid = cpu_to_be32(FW_RI_TPTE_VALID_F | FW_RI_TPTE_STAGKEY_V((mhp->ibmr.rkey & FW_RI_TPTE_STAGKEY_M)) | FW_RI_TPTE_STAGSTATE_V(1) | FW_RI_TPTE_STAGTYPE_V(FW_RI_STAG_NSMR) | FW_RI_TPTE_PDID_V(mhp->attr.pdid)); fr->tpte.locread_to_qpid = cpu_to_be32( FW_RI_TPTE_PERM_V(c4iw_ib_to_tpt_access(wr->access)) | FW_RI_TPTE_ADDRTYPE_V(FW_RI_VA_BASED_TO) | FW_RI_TPTE_PS_V(ilog2(wr->mr->page_size) - 12)); fr->tpte.nosnoop_pbladdr = cpu_to_be32(FW_RI_TPTE_PBLADDR_V( PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3)); fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0); fr->tpte.len_hi = cpu_to_be32(0); fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length); fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); p[0] = cpu_to_be64((u64)mhp->mpl[0]); p[1] = cpu_to_be64((u64)mhp->mpl[1]); *len16 = DIV_ROUND_UP(sizeof(*fr), 16); } static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, const struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16, bool dsgl_supported) { struct fw_ri_immd *imdp; __be64 *p; int i; int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); int rem; if (mhp->mpl_len > t4_max_fr_depth(dsgl_supported && use_dsgl)) return -EINVAL; wqe->fr.qpbinde_to_dcacpu = 0; wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; wqe->fr.addr_type = FW_RI_VA_BASED_TO; wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); wqe->fr.len_hi = 0; wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length); wqe->fr.stag = cpu_to_be32(wr->key); wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { struct fw_ri_dsgl *sglp; for (i = 0; i < mhp->mpl_len; i++) mhp->mpl[i] = (__force u64)cpu_to_be64((u64)mhp->mpl[i]); sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); sglp->op = FW_RI_DATA_DSGL; sglp->r1 = 0; sglp->nsge = cpu_to_be16(1); sglp->addr0 = cpu_to_be64(mhp->mpl_addr); sglp->len0 = cpu_to_be32(pbllen); *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); } else { imdp = (struct fw_ri_immd *)(&wqe->fr + 1); imdp->op = FW_RI_DATA_IMMD; imdp->r1 = 0; imdp->r2 = 0; imdp->immdlen = cpu_to_be32(pbllen); p = (__be64 *)(imdp + 1); rem = pbllen; for (i = 0; i < mhp->mpl_len; i++) { *p = cpu_to_be64((u64)mhp->mpl[i]); rem -= sizeof(*p); if (++p == (__be64 *)&sq->queue[sq->size]) p = (__be64 *)sq->queue; } while (rem) { *p = 0; rem -= sizeof(*p); if (++p == (__be64 *)&sq->queue[sq->size]) p = (__be64 *)sq->queue; } *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) + pbllen, 16); } return 0; } static int build_inv_stag(union t4_wr *wqe, const struct ib_send_wr *wr, u8 *len16) { wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); wqe->inv.r2 = 0; *len16 = DIV_ROUND_UP(sizeof(wqe->inv), 16); return 0; } void c4iw_qp_add_ref(struct ib_qp *qp) { pr_debug("ib_qp %p\n", qp); refcount_inc(&to_c4iw_qp(qp)->qp_refcnt); } void c4iw_qp_rem_ref(struct ib_qp *qp) { pr_debug("ib_qp %p\n", qp); if (refcount_dec_and_test(&to_c4iw_qp(qp)->qp_refcnt)) complete(&to_c4iw_qp(qp)->qp_rel_comp); } static void add_to_fc_list(struct list_head *head, struct list_head *entry) { if (list_empty(entry)) list_add_tail(entry, head); } static int ring_kernel_sq_db(struct c4iw_qp *qhp, u16 inc) { unsigned long flags; xa_lock_irqsave(&qhp->rhp->qps, flags); spin_lock(&qhp->lock); if (qhp->rhp->db_state == NORMAL) t4_ring_sq_db(&qhp->wq, inc, NULL); else { add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); qhp->wq.sq.wq_pidx_inc += inc; } spin_unlock(&qhp->lock); xa_unlock_irqrestore(&qhp->rhp->qps, flags); return 0; } static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc) { unsigned long flags; xa_lock_irqsave(&qhp->rhp->qps, flags); spin_lock(&qhp->lock); if (qhp->rhp->db_state == NORMAL) t4_ring_rq_db(&qhp->wq, inc, NULL); else { add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); qhp->wq.rq.wq_pidx_inc += inc; } spin_unlock(&qhp->lock); xa_unlock_irqrestore(&qhp->rhp->qps, flags); return 0; } static int ib_to_fw_opcode(int ib_opcode) { int opcode; switch (ib_opcode) { case IB_WR_SEND_WITH_INV: opcode = FW_RI_SEND_WITH_INV; break; case IB_WR_SEND: opcode = FW_RI_SEND; break; case IB_WR_RDMA_WRITE: opcode = FW_RI_RDMA_WRITE; break; case IB_WR_RDMA_WRITE_WITH_IMM: opcode = FW_RI_WRITE_IMMEDIATE; break; case IB_WR_RDMA_READ: case IB_WR_RDMA_READ_WITH_INV: opcode = FW_RI_READ_REQ; break; case IB_WR_REG_MR: opcode = FW_RI_FAST_REGISTER; break; case IB_WR_LOCAL_INV: opcode = FW_RI_LOCAL_INV; break; default: opcode = -EINVAL; } return opcode; } static int complete_sq_drain_wr(struct c4iw_qp *qhp, const struct ib_send_wr *wr) { struct t4_cqe cqe = {}; struct c4iw_cq *schp; unsigned long flag; struct t4_cq *cq; int opcode; schp = to_c4iw_cq(qhp->ibqp.send_cq); cq = &schp->cq; opcode = ib_to_fw_opcode(wr->opcode); if (opcode < 0) return opcode; cqe.u.drain_cookie = wr->wr_id; cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | CQE_OPCODE_V(opcode) | CQE_TYPE_V(1) | CQE_SWCQE_V(1) | CQE_DRAIN_V(1) | CQE_QPID_V(qhp->wq.sq.qid)); spin_lock_irqsave(&schp->lock, flag); cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); cq->sw_queue[cq->sw_pidx] = cqe; t4_swcq_produce(cq); spin_unlock_irqrestore(&schp->lock, flag); if (t4_clear_cq_armed(&schp->cq)) { spin_lock_irqsave(&schp->comp_handler_lock, flag); (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context); spin_unlock_irqrestore(&schp->comp_handler_lock, flag); } return 0; } static int complete_sq_drain_wrs(struct c4iw_qp *qhp, const struct ib_send_wr *wr, const struct ib_send_wr **bad_wr) { int ret = 0; while (wr) { ret = complete_sq_drain_wr(qhp, wr); if (ret) { *bad_wr = wr; break; } wr = wr->next; } return ret; } static void complete_rq_drain_wr(struct c4iw_qp *qhp, const struct ib_recv_wr *wr) { struct t4_cqe cqe = {}; struct c4iw_cq *rchp; unsigned long flag; struct t4_cq *cq; rchp = to_c4iw_cq(qhp->ibqp.recv_cq); cq = &rchp->cq; cqe.u.drain_cookie = wr->wr_id; cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | CQE_OPCODE_V(FW_RI_SEND) | CQE_TYPE_V(0) | CQE_SWCQE_V(1) | CQE_DRAIN_V(1) | CQE_QPID_V(qhp->wq.sq.qid)); spin_lock_irqsave(&rchp->lock, flag); cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); cq->sw_queue[cq->sw_pidx] = cqe; t4_swcq_produce(cq); spin_unlock_irqrestore(&rchp->lock, flag); if (t4_clear_cq_armed(&rchp->cq)) { spin_lock_irqsave(&rchp->comp_handler_lock, flag); (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); } } static void complete_rq_drain_wrs(struct c4iw_qp *qhp, const struct ib_recv_wr *wr) { while (wr) { complete_rq_drain_wr(qhp, wr); wr = wr->next; } } int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, const struct ib_send_wr **bad_wr) { int err = 0; u8 len16 = 0; enum fw_wr_opcodes fw_opcode = 0; enum fw_ri_wr_flags fw_flags; struct c4iw_qp *qhp; struct c4iw_dev *rhp; union t4_wr *wqe = NULL; u32 num_wrs; struct t4_swsqe *swsqe; unsigned long flag; u16 idx = 0; qhp = to_c4iw_qp(ibqp); rhp = qhp->rhp; spin_lock_irqsave(&qhp->lock, flag); /* * If the qp has been flushed, then just insert a special * drain cqe. */ if (qhp->wq.flushed) { spin_unlock_irqrestore(&qhp->lock, flag); err = complete_sq_drain_wrs(qhp, wr, bad_wr); return err; } num_wrs = t4_sq_avail(&qhp->wq); if (num_wrs == 0) { spin_unlock_irqrestore(&qhp->lock, flag); *bad_wr = wr; return -ENOMEM; } /* * Fastpath for NVMe-oF target WRITE + SEND_WITH_INV wr chain which is * the response for small NVMEe-oF READ requests. If the chain is * exactly a WRITE->SEND_WITH_INV or a WRITE->SEND and the sgl depths * and lengths meet the requirements of the fw_ri_write_cmpl_wr work * request, then build and post the write_cmpl WR. If any of the tests * below are not true, then we continue on with the tradtional WRITE * and SEND WRs. */ if (qhp->rhp->rdev.lldi.write_cmpl_support && CHELSIO_CHIP_VERSION(qhp->rhp->rdev.lldi.adapter_type) >= CHELSIO_T5 && wr && wr->next && !wr->next->next && wr->opcode == IB_WR_RDMA_WRITE && wr->sg_list[0].length && wr->num_sge <= T4_WRITE_CMPL_MAX_SGL && (wr->next->opcode == IB_WR_SEND || wr->next->opcode == IB_WR_SEND_WITH_INV) && wr->next->sg_list[0].length == T4_WRITE_CMPL_MAX_CQE && wr->next->num_sge == 1 && num_wrs >= 2) { post_write_cmpl(qhp, wr); spin_unlock_irqrestore(&qhp->lock, flag); return 0; } while (wr) { if (num_wrs == 0) { err = -ENOMEM; *bad_wr = wr; break; } wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); fw_flags = 0; if (wr->send_flags & IB_SEND_SOLICITED) fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) fw_flags |= FW_RI_COMPLETION_FLAG; swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; switch (wr->opcode) { case IB_WR_SEND_WITH_INV: case IB_WR_SEND: if (wr->send_flags & IB_SEND_FENCE) fw_flags |= FW_RI_READ_FENCE_FLAG; fw_opcode = FW_RI_SEND_WR; if (wr->opcode == IB_WR_SEND) swsqe->opcode = FW_RI_SEND; else swsqe->opcode = FW_RI_SEND_WITH_INV; err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); break; case IB_WR_RDMA_WRITE_WITH_IMM: if (unlikely(!rhp->rdev.lldi.write_w_imm_support)) { err = -EINVAL; break; } fw_flags |= FW_RI_RDMA_WRITE_WITH_IMMEDIATE; fallthrough; case IB_WR_RDMA_WRITE: fw_opcode = FW_RI_RDMA_WRITE_WR; swsqe->opcode = FW_RI_RDMA_WRITE; err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); break; case IB_WR_RDMA_READ: case IB_WR_RDMA_READ_WITH_INV: fw_opcode = FW_RI_RDMA_READ_WR; swsqe->opcode = FW_RI_READ_REQ; if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) { c4iw_invalidate_mr(rhp, wr->sg_list[0].lkey); fw_flags = FW_RI_RDMA_READ_INVALIDATE; } else { fw_flags = 0; } err = build_rdma_read(wqe, wr, &len16); if (err) break; swsqe->read_len = wr->sg_list[0].length; if (!qhp->wq.sq.oldest_read) qhp->wq.sq.oldest_read = swsqe; break; case IB_WR_REG_MR: { struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr); swsqe->opcode = FW_RI_FAST_REGISTER; if (rhp->rdev.lldi.fr_nsmr_tpte_wr_support && !mhp->attr.state && mhp->mpl_len <= 2) { fw_opcode = FW_RI_FR_NSMR_TPTE_WR; build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr), mhp, &len16); } else { fw_opcode = FW_RI_FR_NSMR_WR; err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), mhp, &len16, rhp->rdev.lldi.ulptx_memwrite_dsgl); if (err) break; } mhp->attr.state = 1; break; } case IB_WR_LOCAL_INV: if (wr->send_flags & IB_SEND_FENCE) fw_flags |= FW_RI_LOCAL_FENCE_FLAG; fw_opcode = FW_RI_INV_LSTAG_WR; swsqe->opcode = FW_RI_LOCAL_INV; err = build_inv_stag(wqe, wr, &len16); c4iw_invalidate_mr(rhp, wr->ex.invalidate_rkey); break; default: pr_warn("%s post of type=%d TBD!\n", __func__, wr->opcode); err = -EINVAL; } if (err) { *bad_wr = wr; break; } swsqe->idx = qhp->wq.sq.pidx; swsqe->complete = 0; swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || qhp->sq_sig_all; swsqe->flushed = 0; swsqe->wr_id = wr->wr_id; if (c4iw_wr_log) { swsqe->sge_ts = cxgb4_read_sge_timestamp( rhp->rdev.lldi.ports[0]); swsqe->host_time = ktime_get(); } init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); pr_debug("cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n", (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, swsqe->opcode, swsqe->read_len); wr = wr->next; num_wrs--; t4_sq_produce(&qhp->wq, len16); idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); } if (!rhp->rdev.status_page->db_off) { t4_ring_sq_db(&qhp->wq, idx, wqe); spin_unlock_irqrestore(&qhp->lock, flag); } else { spin_unlock_irqrestore(&qhp->lock, flag); ring_kernel_sq_db(qhp, idx); } return err; } int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, const struct ib_recv_wr **bad_wr) { int err = 0; struct c4iw_qp *qhp; union t4_recv_wr *wqe = NULL; u32 num_wrs; u8 len16 = 0; unsigned long flag; u16 idx = 0; qhp = to_c4iw_qp(ibqp); spin_lock_irqsave(&qhp->lock, flag); /* * If the qp has been flushed, then just insert a special * drain cqe. */ if (qhp->wq.flushed) { spin_unlock_irqrestore(&qhp->lock, flag); complete_rq_drain_wrs(qhp, wr); return err; } num_wrs = t4_rq_avail(&qhp->wq); if (num_wrs == 0) { spin_unlock_irqrestore(&qhp->lock, flag); *bad_wr = wr; return -ENOMEM; } while (wr) { if (wr->num_sge > T4_MAX_RECV_SGE) { err = -EINVAL; *bad_wr = wr; break; } wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + qhp->wq.rq.wq_pidx * T4_EQ_ENTRY_SIZE); if (num_wrs) err = build_rdma_recv(qhp, wqe, wr, &len16); else err = -ENOMEM; if (err) { *bad_wr = wr; break; } qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; if (c4iw_wr_log) { qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].sge_ts = cxgb4_read_sge_timestamp( qhp->rhp->rdev.lldi.ports[0]); qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_time = ktime_get(); } wqe->recv.opcode = FW_RI_RECV_WR; wqe->recv.r1 = 0; wqe->recv.wrid = qhp->wq.rq.pidx; wqe->recv.r2[0] = 0; wqe->recv.r2[1] = 0; wqe->recv.r2[2] = 0; wqe->recv.len16 = len16; pr_debug("cookie 0x%llx pidx %u\n", (unsigned long long)wr->wr_id, qhp->wq.rq.pidx); t4_rq_produce(&qhp->wq, len16); idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); wr = wr->next; num_wrs--; } if (!qhp->rhp->rdev.status_page->db_off) { t4_ring_rq_db(&qhp->wq, idx, wqe); spin_unlock_irqrestore(&qhp->lock, flag); } else { spin_unlock_irqrestore(&qhp->lock, flag); ring_kernel_rq_db(qhp, idx); } return err; } static void defer_srq_wr(struct t4_srq *srq, union t4_recv_wr *wqe, u64 wr_id, u8 len16) { struct t4_srq_pending_wr *pwr = &srq->pending_wrs[srq->pending_pidx]; pr_debug("%s cidx %u pidx %u wq_pidx %u in_use %u ooo_count %u wr_id 0x%llx pending_cidx %u pending_pidx %u pending_in_use %u\n", __func__, srq->cidx, srq->pidx, srq->wq_pidx, srq->in_use, srq->ooo_count, (unsigned long long)wr_id, srq->pending_cidx, srq->pending_pidx, srq->pending_in_use); pwr->wr_id = wr_id; pwr->len16 = len16; memcpy(&pwr->wqe, wqe, len16 * 16); t4_srq_produce_pending_wr(srq); } int c4iw_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, const struct ib_recv_wr **bad_wr) { union t4_recv_wr *wqe, lwqe; struct c4iw_srq *srq; unsigned long flag; u8 len16 = 0; u16 idx = 0; int err = 0; u32 num_wrs; srq = to_c4iw_srq(ibsrq); spin_lock_irqsave(&srq->lock, flag); num_wrs = t4_srq_avail(&srq->wq); if (num_wrs == 0) { spin_unlock_irqrestore(&srq->lock, flag); return -ENOMEM; } while (wr) { if (wr->num_sge > T4_MAX_RECV_SGE) { err = -EINVAL; *bad_wr = wr; break; } wqe = &lwqe; if (num_wrs) err = build_srq_recv(wqe, wr, &len16); else err = -ENOMEM; if (err) { *bad_wr = wr; break; } wqe->recv.opcode = FW_RI_RECV_WR; wqe->recv.r1 = 0; wqe->recv.wrid = srq->wq.pidx; wqe->recv.r2[0] = 0; wqe->recv.r2[1] = 0; wqe->recv.r2[2] = 0; wqe->recv.len16 = len16; if (srq->wq.ooo_count || srq->wq.pending_in_use || srq->wq.sw_rq[srq->wq.pidx].valid) { defer_srq_wr(&srq->wq, wqe, wr->wr_id, len16); } else { srq->wq.sw_rq[srq->wq.pidx].wr_id = wr->wr_id; srq->wq.sw_rq[srq->wq.pidx].valid = 1; c4iw_copy_wr_to_srq(&srq->wq, wqe, len16); pr_debug("%s cidx %u pidx %u wq_pidx %u in_use %u wr_id 0x%llx\n", __func__, srq->wq.cidx, srq->wq.pidx, srq->wq.wq_pidx, srq->wq.in_use, (unsigned long long)wr->wr_id); t4_srq_produce(&srq->wq, len16); idx += DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); } wr = wr->next; num_wrs--; } if (idx) t4_ring_srq_db(&srq->wq, idx, len16, wqe); spin_unlock_irqrestore(&srq->lock, flag); return err; } static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, u8 *ecode) { int status; int tagged; int opcode; int rqtype; int send_inv; if (!err_cqe) { *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; *ecode = 0; return; } status = CQE_STATUS(err_cqe); opcode = CQE_OPCODE(err_cqe); rqtype = RQ_TYPE(err_cqe); send_inv = (opcode == FW_RI_SEND_WITH_INV) || (opcode == FW_RI_SEND_WITH_SE_INV); tagged = (opcode == FW_RI_RDMA_WRITE) || (rqtype && (opcode == FW_RI_READ_RESP)); switch (status) { case T4_ERR_STAG: if (send_inv) { *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; *ecode = RDMAP_CANT_INV_STAG; } else { *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; *ecode = RDMAP_INV_STAG; } break; case T4_ERR_PDID: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; if ((opcode == FW_RI_SEND_WITH_INV) || (opcode == FW_RI_SEND_WITH_SE_INV)) *ecode = RDMAP_CANT_INV_STAG; else *ecode = RDMAP_STAG_NOT_ASSOC; break; case T4_ERR_QPID: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; *ecode = RDMAP_STAG_NOT_ASSOC; break; case T4_ERR_ACCESS: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; *ecode = RDMAP_ACC_VIOL; break; case T4_ERR_WRAP: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; *ecode = RDMAP_TO_WRAP; break; case T4_ERR_BOUND: if (tagged) { *layer_type = LAYER_DDP|DDP_TAGGED_ERR; *ecode = DDPT_BASE_BOUNDS; } else { *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; *ecode = RDMAP_BASE_BOUNDS; } break; case T4_ERR_INVALIDATE_SHARED_MR: case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; *ecode = RDMAP_CANT_INV_STAG; break; case T4_ERR_ECC: case T4_ERR_ECC_PSTAG: case T4_ERR_INTERNAL_ERR: *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; *ecode = 0; break; case T4_ERR_OUT_OF_RQE: *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_INV_MSN_NOBUF; break; case T4_ERR_PBL_ADDR_BOUND: *layer_type = LAYER_DDP|DDP_TAGGED_ERR; *ecode = DDPT_BASE_BOUNDS; break; case T4_ERR_CRC: *layer_type = LAYER_MPA|DDP_LLP; *ecode = MPA_CRC_ERR; break; case T4_ERR_MARKER: *layer_type = LAYER_MPA|DDP_LLP; *ecode = MPA_MARKER_ERR; break; case T4_ERR_PDU_LEN_ERR: *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_MSG_TOOBIG; break; case T4_ERR_DDP_VERSION: if (tagged) { *layer_type = LAYER_DDP|DDP_TAGGED_ERR; *ecode = DDPT_INV_VERS; } else { *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_INV_VERS; } break; case T4_ERR_RDMA_VERSION: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; *ecode = RDMAP_INV_VERS; break; case T4_ERR_OPCODE: *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; *ecode = RDMAP_INV_OPCODE; break; case T4_ERR_DDP_QUEUE_NUM: *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_INV_QN; break; case T4_ERR_MSN: case T4_ERR_MSN_GAP: case T4_ERR_MSN_RANGE: case T4_ERR_IRD_OVERFLOW: *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_INV_MSN_RANGE; break; case T4_ERR_TBIT: *layer_type = LAYER_DDP|DDP_LOCAL_CATA; *ecode = 0; break; case T4_ERR_MO: *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; *ecode = DDPU_INV_MO; break; default: *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; *ecode = 0; break; } } static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, gfp_t gfp) { struct fw_ri_wr *wqe; struct sk_buff *skb; struct terminate_message *term; pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, qhp->ep->hwtid); skb = skb_dequeue(&qhp->ep->com.ep_skb_list); if (WARN_ON(!skb)) return; set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); wqe = __skb_put_zero(skb, sizeof(*wqe)); wqe->op_compl = cpu_to_be32(FW_WR_OP_V(FW_RI_INIT_WR)); wqe->flowid_len16 = cpu_to_be32( FW_WR_FLOWID_V(qhp->ep->hwtid) | FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; wqe->u.terminate.immdlen = cpu_to_be32(sizeof(*term)); term = (struct terminate_message *)wqe->u.terminate.termmsg; if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { term->layer_etype = qhp->attr.layer_etype; term->ecode = qhp->attr.ecode; } else build_term_codes(err_cqe, &term->layer_etype, &term->ecode); c4iw_ofld_send(&qhp->rhp->rdev, skb); } /* * Assumes qhp lock is held. */ static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, struct c4iw_cq *schp) { int count; int rq_flushed = 0, sq_flushed; unsigned long flag; pr_debug("qhp %p rchp %p schp %p\n", qhp, rchp, schp); /* locking hierarchy: cqs lock first, then qp lock. */ spin_lock_irqsave(&rchp->lock, flag); if (schp != rchp) spin_lock(&schp->lock); spin_lock(&qhp->lock); if (qhp->wq.flushed) { spin_unlock(&qhp->lock); if (schp != rchp) spin_unlock(&schp->lock); spin_unlock_irqrestore(&rchp->lock, flag); return; } qhp->wq.flushed = 1; t4_set_wq_in_error(&qhp->wq, 0); c4iw_flush_hw_cq(rchp, qhp); if (!qhp->srq) { c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); } if (schp != rchp) c4iw_flush_hw_cq(schp, qhp); sq_flushed = c4iw_flush_sq(qhp); spin_unlock(&qhp->lock); if (schp != rchp) spin_unlock(&schp->lock); spin_unlock_irqrestore(&rchp->lock, flag); if (schp == rchp) { if ((rq_flushed || sq_flushed) && t4_clear_cq_armed(&rchp->cq)) { spin_lock_irqsave(&rchp->comp_handler_lock, flag); (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); } } else { if (rq_flushed && t4_clear_cq_armed(&rchp->cq)) { spin_lock_irqsave(&rchp->comp_handler_lock, flag); (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); } if (sq_flushed && t4_clear_cq_armed(&schp->cq)) { spin_lock_irqsave(&schp->comp_handler_lock, flag); (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context); spin_unlock_irqrestore(&schp->comp_handler_lock, flag); } } } static void flush_qp(struct c4iw_qp *qhp) { struct c4iw_cq *rchp, *schp; unsigned long flag; rchp = to_c4iw_cq(qhp->ibqp.recv_cq); schp = to_c4iw_cq(qhp->ibqp.send_cq); if (qhp->ibqp.uobject) { /* for user qps, qhp->wq.flushed is protected by qhp->mutex */ if (qhp->wq.flushed) return; qhp->wq.flushed = 1; t4_set_wq_in_error(&qhp->wq, 0); t4_set_cq_in_error(&rchp->cq); spin_lock_irqsave(&rchp->comp_handler_lock, flag); (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); if (schp != rchp) { t4_set_cq_in_error(&schp->cq); spin_lock_irqsave(&schp->comp_handler_lock, flag); (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context); spin_unlock_irqrestore(&schp->comp_handler_lock, flag); } return; } __flush_qp(qhp, rchp, schp); } static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, struct c4iw_ep *ep) { struct fw_ri_wr *wqe; int ret; struct sk_buff *skb; pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, ep->hwtid); skb = skb_dequeue(&ep->com.ep_skb_list); if (WARN_ON(!skb)) return -ENOMEM; set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); wqe = __skb_put_zero(skb, sizeof(*wqe)); wqe->op_compl = cpu_to_be32( FW_WR_OP_V(FW_RI_INIT_WR) | FW_WR_COMPL_F); wqe->flowid_len16 = cpu_to_be32( FW_WR_FLOWID_V(ep->hwtid) | FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); wqe->cookie = (uintptr_t)ep->com.wr_waitp; wqe->u.fini.type = FW_RI_TYPE_FINI; ret = c4iw_ref_send_wait(&rhp->rdev, skb, ep->com.wr_waitp, qhp->ep->hwtid, qhp->wq.sq.qid, __func__); pr_debug("ret %d\n", ret); return ret; } static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) { pr_debug("p2p_type = %d\n", p2p_type); memset(&init->u, 0, sizeof(init->u)); switch (p2p_type) { case FW_RI_INIT_P2PTYPE_RDMA_WRITE: init->u.write.opcode = FW_RI_RDMA_WRITE_WR; init->u.write.stag_sink = cpu_to_be32(1); init->u.write.to_sink = cpu_to_be64(1); init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; init->u.write.len16 = DIV_ROUND_UP( sizeof(init->u.write) + sizeof(struct fw_ri_immd), 16); break; case FW_RI_INIT_P2PTYPE_READ_REQ: init->u.write.opcode = FW_RI_RDMA_READ_WR; init->u.read.stag_src = cpu_to_be32(1); init->u.read.to_src_lo = cpu_to_be32(1); init->u.read.stag_sink = cpu_to_be32(1); init->u.read.to_sink_lo = cpu_to_be32(1); init->u.read.len16 = DIV_ROUND_UP(sizeof(init->u.read), 16); break; } } static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) { struct fw_ri_wr *wqe; int ret; struct sk_buff *skb; pr_debug("qhp %p qid 0x%x tid %u ird %u ord %u\n", qhp, qhp->wq.sq.qid, qhp->ep->hwtid, qhp->ep->ird, qhp->ep->ord); skb = alloc_skb(sizeof(*wqe), GFP_KERNEL); if (!skb) { ret = -ENOMEM; goto out; } ret = alloc_ird(rhp, qhp->attr.max_ird); if (ret) { qhp->attr.max_ird = 0; kfree_skb(skb); goto out; } set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); wqe = __skb_put_zero(skb, sizeof(*wqe)); wqe->op_compl = cpu_to_be32( FW_WR_OP_V(FW_RI_INIT_WR) | FW_WR_COMPL_F); wqe->flowid_len16 = cpu_to_be32( FW_WR_FLOWID_V(qhp->ep->hwtid) | FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); wqe->cookie = (uintptr_t)qhp->ep->com.wr_waitp; wqe->u.init.type = FW_RI_TYPE_INIT; wqe->u.init.mpareqbit_p2ptype = FW_RI_WR_MPAREQBIT_V(qhp->attr.mpa_attr.initiator) | FW_RI_WR_P2PTYPE_V(qhp->attr.mpa_attr.p2p_type); wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; if (qhp->attr.mpa_attr.recv_marker_enabled) wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; if (qhp->attr.mpa_attr.xmit_marker_enabled) wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; if (qhp->attr.mpa_attr.crc_enabled) wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | FW_RI_QP_RDMA_WRITE_ENABLE | FW_RI_QP_BIND_ENABLE; if (!qhp->ibqp.uobject) wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | FW_RI_QP_STAG0_ENABLE; wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); if (qhp->srq) { wqe->u.init.rq_eqid = cpu_to_be32(FW_RI_INIT_RQEQID_SRQ | qhp->srq->idx); } else { wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - rhp->rdev.lldi.vr->rq.start); } wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq); wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq); if (qhp->attr.mpa_attr.initiator) build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); ret = c4iw_ref_send_wait(&rhp->rdev, skb, qhp->ep->com.wr_waitp, qhp->ep->hwtid, qhp->wq.sq.qid, __func__); if (!ret) goto out; free_ird(rhp, qhp->attr.max_ird); out: pr_debug("ret %d\n", ret); return ret; } int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, enum c4iw_qp_attr_mask mask, struct c4iw_qp_attributes *attrs, int internal) { int ret = 0; struct c4iw_qp_attributes newattr = qhp->attr; int disconnect = 0; int terminate = 0; int abort = 0; int free = 0; struct c4iw_ep *ep = NULL; pr_debug("qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state, (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); mutex_lock(&qhp->mutex); /* Process attr changes if in IDLE */ if (mask & C4IW_QP_ATTR_VALID_MODIFY) { if (qhp->attr.state != C4IW_QP_STATE_IDLE) { ret = -EIO; goto out; } if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) newattr.enable_rdma_read = attrs->enable_rdma_read; if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) newattr.enable_rdma_write = attrs->enable_rdma_write; if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) newattr.enable_bind = attrs->enable_bind; if (mask & C4IW_QP_ATTR_MAX_ORD) { if (attrs->max_ord > c4iw_max_read_depth) { ret = -EINVAL; goto out; } newattr.max_ord = attrs->max_ord; } if (mask & C4IW_QP_ATTR_MAX_IRD) { if (attrs->max_ird > cur_max_read_depth(rhp)) { ret = -EINVAL; goto out; } newattr.max_ird = attrs->max_ird; } qhp->attr = newattr; } if (mask & C4IW_QP_ATTR_SQ_DB) { ret = ring_kernel_sq_db(qhp, attrs->sq_db_inc); goto out; } if (mask & C4IW_QP_ATTR_RQ_DB) { ret = ring_kernel_rq_db(qhp, attrs->rq_db_inc); goto out; } if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) goto out; if (qhp->attr.state == attrs->next_state) goto out; switch (qhp->attr.state) { case C4IW_QP_STATE_IDLE: switch (attrs->next_state) { case C4IW_QP_STATE_RTS: if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { ret = -EINVAL; goto out; } if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { ret = -EINVAL; goto out; } qhp->attr.mpa_attr = attrs->mpa_attr; qhp->attr.llp_stream_handle = attrs->llp_stream_handle; qhp->ep = qhp->attr.llp_stream_handle; set_state(qhp, C4IW_QP_STATE_RTS); /* * Ref the endpoint here and deref when we * disassociate the endpoint from the QP. This * happens in CLOSING->IDLE transition or *->ERROR * transition. */ c4iw_get_ep(&qhp->ep->com); ret = rdma_init(rhp, qhp); if (ret) goto err; break; case C4IW_QP_STATE_ERROR: set_state(qhp, C4IW_QP_STATE_ERROR); flush_qp(qhp); break; default: ret = -EINVAL; goto out; } break; case C4IW_QP_STATE_RTS: switch (attrs->next_state) { case C4IW_QP_STATE_CLOSING: t4_set_wq_in_error(&qhp->wq, 0); set_state(qhp, C4IW_QP_STATE_CLOSING); ep = qhp->ep; if (!internal) { abort = 0; disconnect = 1; c4iw_get_ep(&qhp->ep->com); } ret = rdma_fini(rhp, qhp, ep); if (ret) goto err; break; case C4IW_QP_STATE_TERMINATE: t4_set_wq_in_error(&qhp->wq, 0); set_state(qhp, C4IW_QP_STATE_TERMINATE); qhp->attr.layer_etype = attrs->layer_etype; qhp->attr.ecode = attrs->ecode; ep = qhp->ep; if (!internal) { c4iw_get_ep(&ep->com); terminate = 1; disconnect = 1; } else { terminate = qhp->attr.send_term; ret = rdma_fini(rhp, qhp, ep); if (ret) goto err; } break; case C4IW_QP_STATE_ERROR: t4_set_wq_in_error(&qhp->wq, 0); set_state(qhp, C4IW_QP_STATE_ERROR); if (!internal) { disconnect = 1; ep = qhp->ep; c4iw_get_ep(&qhp->ep->com); } goto err; break; default: ret = -EINVAL; goto out; } break; case C4IW_QP_STATE_CLOSING: /* * Allow kernel users to move to ERROR for qp draining. */ if (!internal && (qhp->ibqp.uobject || attrs->next_state != C4IW_QP_STATE_ERROR)) { ret = -EINVAL; goto out; } switch (attrs->next_state) { case C4IW_QP_STATE_IDLE: flush_qp(qhp); set_state(qhp, C4IW_QP_STATE_IDLE); qhp->attr.llp_stream_handle = NULL; c4iw_put_ep(&qhp->ep->com); qhp->ep = NULL; wake_up(&qhp->wait); break; case C4IW_QP_STATE_ERROR: goto err; default: ret = -EINVAL; goto err; } break; case C4IW_QP_STATE_ERROR: if (attrs->next_state != C4IW_QP_STATE_IDLE) { ret = -EINVAL; goto out; } if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { ret = -EINVAL; goto out; } set_state(qhp, C4IW_QP_STATE_IDLE); break; case C4IW_QP_STATE_TERMINATE: if (!internal) { ret = -EINVAL; goto out; } goto err; break; default: pr_err("%s in a bad state %d\n", __func__, qhp->attr.state); ret = -EINVAL; goto err; break; } goto out; err: pr_debug("disassociating ep %p qpid 0x%x\n", qhp->ep, qhp->wq.sq.qid); /* disassociate the LLP connection */ qhp->attr.llp_stream_handle = NULL; if (!ep) ep = qhp->ep; qhp->ep = NULL; set_state(qhp, C4IW_QP_STATE_ERROR); free = 1; abort = 1; flush_qp(qhp); wake_up(&qhp->wait); out: mutex_unlock(&qhp->mutex); if (terminate) post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); /* * If disconnect is 1, then we need to initiate a disconnect * on the EP. This can be a normal close (RTS->CLOSING) or * an abnormal close (RTS/CLOSING->ERROR). */ if (disconnect) { c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : GFP_KERNEL); c4iw_put_ep(&ep->com); } /* * If free is 1, then we've disassociated the EP from the QP * and we need to dereference the EP. */ if (free) c4iw_put_ep(&ep->com); pr_debug("exit state %d\n", qhp->attr.state); return ret; } int c4iw_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata) { struct c4iw_dev *rhp; struct c4iw_qp *qhp; struct c4iw_ucontext *ucontext; struct c4iw_qp_attributes attrs; qhp = to_c4iw_qp(ib_qp); rhp = qhp->rhp; ucontext = qhp->ucontext; attrs.next_state = C4IW_QP_STATE_ERROR; if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); else c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); wait_event(qhp->wait, !qhp->ep); xa_lock_irq(&rhp->qps); __xa_erase(&rhp->qps, qhp->wq.sq.qid); if (!list_empty(&qhp->db_fc_entry)) list_del_init(&qhp->db_fc_entry); xa_unlock_irq(&rhp->qps); free_ird(rhp, qhp->attr.max_ird); c4iw_qp_rem_ref(ib_qp); wait_for_completion(&qhp->qp_rel_comp); pr_debug("ib_qp %p qpid 0x%0x\n", ib_qp, qhp->wq.sq.qid); pr_debug("qhp %p ucontext %p\n", qhp, ucontext); destroy_qp(&rhp->rdev, &qhp->wq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !qhp->srq); c4iw_put_wr_wait(qhp->wr_waitp); return 0; } int c4iw_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *attrs, struct ib_udata *udata) { struct ib_pd *pd = qp->pd; struct c4iw_dev *rhp; struct c4iw_qp *qhp = to_c4iw_qp(qp); struct c4iw_pd *php; struct c4iw_cq *schp; struct c4iw_cq *rchp; struct c4iw_create_qp_resp uresp; unsigned int sqsize, rqsize = 0; struct c4iw_ucontext *ucontext = rdma_udata_to_drv_context( udata, struct c4iw_ucontext, ibucontext); int ret; struct c4iw_mm_entry *sq_key_mm, *rq_key_mm = NULL, *sq_db_key_mm; struct c4iw_mm_entry *rq_db_key_mm = NULL, *ma_sync_key_mm = NULL; if (attrs->qp_type != IB_QPT_RC || attrs->create_flags) return -EOPNOTSUPP; php = to_c4iw_pd(pd); rhp = php->rhp; schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); if (!schp || !rchp) return -EINVAL; if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) return -EINVAL; if (!attrs->srq) { if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) return -E2BIG; rqsize = attrs->cap.max_recv_wr + 1; if (rqsize < 8) rqsize = 8; } if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) return -E2BIG; sqsize = attrs->cap.max_send_wr + 1; if (sqsize < 8) sqsize = 8; qhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); if (!qhp->wr_waitp) return -ENOMEM; qhp->wq.sq.size = sqsize; qhp->wq.sq.memsize = (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); qhp->wq.sq.flush_cidx = -1; if (!attrs->srq) { qhp->wq.rq.size = rqsize; qhp->wq.rq.memsize = (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * sizeof(*qhp->wq.rq.queue); } if (ucontext) { qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); if (!attrs->srq) qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE); } ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, qhp->wr_waitp, !attrs->srq); if (ret) goto err_free_wr_wait; attrs->cap.max_recv_wr = rqsize - 1; attrs->cap.max_send_wr = sqsize - 1; attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; qhp->rhp = rhp; qhp->attr.pd = php->pdid; qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; qhp->attr.sq_num_entries = attrs->cap.max_send_wr; qhp->attr.sq_max_sges = attrs->cap.max_send_sge; qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; if (!attrs->srq) { qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; } qhp->attr.state = C4IW_QP_STATE_IDLE; qhp->attr.next_state = C4IW_QP_STATE_IDLE; qhp->attr.enable_rdma_read = 1; qhp->attr.enable_rdma_write = 1; qhp->attr.enable_bind = 1; qhp->attr.max_ord = 0; qhp->attr.max_ird = 0; qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; spin_lock_init(&qhp->lock); mutex_init(&qhp->mutex); init_waitqueue_head(&qhp->wait); init_completion(&qhp->qp_rel_comp); refcount_set(&qhp->qp_refcnt, 1); ret = xa_insert_irq(&rhp->qps, qhp->wq.sq.qid, qhp, GFP_KERNEL); if (ret) goto err_destroy_qp; if (udata && ucontext) { sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); if (!sq_key_mm) { ret = -ENOMEM; goto err_remove_handle; } if (!attrs->srq) { rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); if (!rq_key_mm) { ret = -ENOMEM; goto err_free_sq_key; } } sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); if (!sq_db_key_mm) { ret = -ENOMEM; goto err_free_rq_key; } if (!attrs->srq) { rq_db_key_mm = kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); if (!rq_db_key_mm) { ret = -ENOMEM; goto err_free_sq_db_key; } } memset(&uresp, 0, sizeof(uresp)); if (t4_sq_onchip(&qhp->wq.sq)) { ma_sync_key_mm = kmalloc(sizeof(*ma_sync_key_mm), GFP_KERNEL); if (!ma_sync_key_mm) { ret = -ENOMEM; goto err_free_rq_db_key; } uresp.flags = C4IW_QPF_ONCHIP; } if (rhp->rdev.lldi.write_w_imm_support) uresp.flags |= C4IW_QPF_WRITE_W_IMM; uresp.qid_mask = rhp->rdev.qpmask; uresp.sqid = qhp->wq.sq.qid; uresp.sq_size = qhp->wq.sq.size; uresp.sq_memsize = qhp->wq.sq.memsize; if (!attrs->srq) { uresp.rqid = qhp->wq.rq.qid; uresp.rq_size = qhp->wq.rq.size; uresp.rq_memsize = qhp->wq.rq.memsize; } spin_lock(&ucontext->mmap_lock); if (ma_sync_key_mm) { uresp.ma_sync_key = ucontext->key; ucontext->key += PAGE_SIZE; } uresp.sq_key = ucontext->key; ucontext->key += PAGE_SIZE; if (!attrs->srq) { uresp.rq_key = ucontext->key; ucontext->key += PAGE_SIZE; } uresp.sq_db_gts_key = ucontext->key; ucontext->key += PAGE_SIZE; if (!attrs->srq) { uresp.rq_db_gts_key = ucontext->key; ucontext->key += PAGE_SIZE; } spin_unlock(&ucontext->mmap_lock); ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); if (ret) goto err_free_ma_sync_key; sq_key_mm->key = uresp.sq_key; sq_key_mm->addr = qhp->wq.sq.phys_addr; sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); insert_mmap(ucontext, sq_key_mm); if (!attrs->srq) { rq_key_mm->key = uresp.rq_key; rq_key_mm->addr = virt_to_phys(qhp->wq.rq.queue); rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); insert_mmap(ucontext, rq_key_mm); } sq_db_key_mm->key = uresp.sq_db_gts_key; sq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.sq.bar2_pa; sq_db_key_mm->len = PAGE_SIZE; insert_mmap(ucontext, sq_db_key_mm); if (!attrs->srq) { rq_db_key_mm->key = uresp.rq_db_gts_key; rq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.rq.bar2_pa; rq_db_key_mm->len = PAGE_SIZE; insert_mmap(ucontext, rq_db_key_mm); } if (ma_sync_key_mm) { ma_sync_key_mm->key = uresp.ma_sync_key; ma_sync_key_mm->addr = (pci_resource_start(rhp->rdev.lldi.pdev, 0) + PCIE_MA_SYNC_A) & PAGE_MASK; ma_sync_key_mm->len = PAGE_SIZE; insert_mmap(ucontext, ma_sync_key_mm); } qhp->ucontext = ucontext; } if (!attrs->srq) { qhp->wq.qp_errp = &qhp->wq.rq.queue[qhp->wq.rq.size].status.qp_err; } else { qhp->wq.qp_errp = &qhp->wq.sq.queue[qhp->wq.sq.size].status.qp_err; qhp->wq.srqidxp = &qhp->wq.sq.queue[qhp->wq.sq.size].status.srqidx; } qhp->ibqp.qp_num = qhp->wq.sq.qid; if (attrs->srq) qhp->srq = to_c4iw_srq(attrs->srq); INIT_LIST_HEAD(&qhp->db_fc_entry); pr_debug("sq id %u size %u memsize %zu num_entries %u rq id %u size %u memsize %zu num_entries %u\n", qhp->wq.sq.qid, qhp->wq.sq.size, qhp->wq.sq.memsize, attrs->cap.max_send_wr, qhp->wq.rq.qid, qhp->wq.rq.size, qhp->wq.rq.memsize, attrs->cap.max_recv_wr); return 0; err_free_ma_sync_key: kfree(ma_sync_key_mm); err_free_rq_db_key: if (!attrs->srq) kfree(rq_db_key_mm); err_free_sq_db_key: kfree(sq_db_key_mm); err_free_rq_key: if (!attrs->srq) kfree(rq_key_mm); err_free_sq_key: kfree(sq_key_mm); err_remove_handle: xa_erase_irq(&rhp->qps, qhp->wq.sq.qid); err_destroy_qp: destroy_qp(&rhp->rdev, &qhp->wq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !attrs->srq); err_free_wr_wait: c4iw_put_wr_wait(qhp->wr_waitp); return ret; } int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct c4iw_dev *rhp; struct c4iw_qp *qhp; enum c4iw_qp_attr_mask mask = 0; struct c4iw_qp_attributes attrs = {}; pr_debug("ib_qp %p\n", ibqp); if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) return -EOPNOTSUPP; /* iwarp does not support the RTR state */ if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) attr_mask &= ~IB_QP_STATE; /* Make sure we still have something left to do */ if (!attr_mask) return 0; qhp = to_c4iw_qp(ibqp); rhp = qhp->rhp; attrs.next_state = c4iw_convert_state(attr->qp_state); attrs.enable_rdma_read = (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) ? 1 : 0; attrs.enable_rdma_write = (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) ? 1 : 0; attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? (C4IW_QP_ATTR_ENABLE_RDMA_READ | C4IW_QP_ATTR_ENABLE_RDMA_WRITE | C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; /* * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for * ringing the queue db when we're in DB_FULL mode. * Only allow this on T4 devices. */ attrs.sq_db_inc = attr->sq_psn; attrs.rq_db_inc = attr->rq_psn; mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0; mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0; if (!is_t4(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) && (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB))) return -EINVAL; return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); } struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) { pr_debug("ib_dev %p qpn 0x%x\n", dev, qpn); return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); } void c4iw_dispatch_srq_limit_reached_event(struct c4iw_srq *srq) { struct ib_event event = {}; event.device = &srq->rhp->ibdev; event.element.srq = &srq->ibsrq; event.event = IB_EVENT_SRQ_LIMIT_REACHED; ib_dispatch_event(&event); } int c4iw_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *attr, enum ib_srq_attr_mask srq_attr_mask, struct ib_udata *udata) { struct c4iw_srq *srq = to_c4iw_srq(ib_srq); int ret = 0; /* * XXX 0 mask == a SW interrupt for srq_limit reached... */ if (udata && !srq_attr_mask) { c4iw_dispatch_srq_limit_reached_event(srq); goto out; } /* no support for this yet */ if (srq_attr_mask & IB_SRQ_MAX_WR) { ret = -EINVAL; goto out; } if (!udata && (srq_attr_mask & IB_SRQ_LIMIT)) { srq->armed = true; srq->srq_limit = attr->srq_limit; } out: return ret; } int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_qp_init_attr *init_attr) { struct c4iw_qp *qhp = to_c4iw_qp(ibqp); memset(attr, 0, sizeof(*attr)); memset(init_attr, 0, sizeof(*init_attr)); attr->qp_state = to_ib_qp_state(qhp->attr.state); attr->cur_qp_state = to_ib_qp_state(qhp->attr.state); init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; init_attr->cap.max_recv_sge = qhp->attr.rq_max_sges; init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; return 0; } static void free_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, struct c4iw_wr_wait *wr_waitp) { struct c4iw_rdev *rdev = &srq->rhp->rdev; struct sk_buff *skb = srq->destroy_skb; struct t4_srq *wq = &srq->wq; struct fw_ri_res_wr *res_wr; struct fw_ri_res *res; int wr_len; wr_len = sizeof(*res_wr) + sizeof(*res); set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); memset(res_wr, 0, wr_len); res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | FW_RI_RES_WR_NRES_V(1) | FW_WR_COMPL_F); res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); res_wr->cookie = (uintptr_t)wr_waitp; res = res_wr->res; res->u.srq.restype = FW_RI_RES_TYPE_SRQ; res->u.srq.op = FW_RI_RES_OP_RESET; res->u.srq.srqid = cpu_to_be32(srq->idx); res->u.srq.eqid = cpu_to_be32(wq->qid); c4iw_init_wr_wait(wr_waitp); c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, 0, __func__); dma_free_coherent(&rdev->lldi.pdev->dev, wq->memsize, wq->queue, dma_unmap_addr(wq, mapping)); c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); kfree(wq->sw_rq); c4iw_put_qpid(rdev, wq->qid, uctx); } static int alloc_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, struct c4iw_wr_wait *wr_waitp) { struct c4iw_rdev *rdev = &srq->rhp->rdev; int user = (uctx != &rdev->uctx); struct t4_srq *wq = &srq->wq; struct fw_ri_res_wr *res_wr; struct fw_ri_res *res; struct sk_buff *skb; int wr_len; int eqsize; int ret = -ENOMEM; wq->qid = c4iw_get_qpid(rdev, uctx); if (!wq->qid) goto err; if (!user) { wq->sw_rq = kcalloc(wq->size, sizeof(*wq->sw_rq), GFP_KERNEL); if (!wq->sw_rq) goto err_put_qpid; wq->pending_wrs = kcalloc(srq->wq.size, sizeof(*srq->wq.pending_wrs), GFP_KERNEL); if (!wq->pending_wrs) goto err_free_sw_rq; } wq->rqt_size = wq->size; wq->rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rqt_size); if (!wq->rqt_hwaddr) goto err_free_pending_wrs; wq->rqt_abs_idx = (wq->rqt_hwaddr - rdev->lldi.vr->rq.start) >> T4_RQT_ENTRY_SHIFT; wq->queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, wq->memsize, &wq->dma_addr, GFP_KERNEL); if (!wq->queue) goto err_free_rqtpool; dma_unmap_addr_set(wq, mapping, wq->dma_addr); wq->bar2_va = c4iw_bar2_addrs(rdev, wq->qid, CXGB4_BAR2_QTYPE_EGRESS, &wq->bar2_qid, user ? &wq->bar2_pa : NULL); /* * User mode must have bar2 access. */ if (user && !wq->bar2_va) { pr_warn(MOD "%s: srqid %u not in BAR2 range.\n", pci_name(rdev->lldi.pdev), wq->qid); ret = -EINVAL; goto err_free_queue; } /* build fw_ri_res_wr */ wr_len = sizeof(*res_wr) + sizeof(*res); skb = alloc_skb(wr_len, GFP_KERNEL); if (!skb) goto err_free_queue; set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); memset(res_wr, 0, wr_len); res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | FW_RI_RES_WR_NRES_V(1) | FW_WR_COMPL_F); res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); res_wr->cookie = (uintptr_t)wr_waitp; res = res_wr->res; res->u.srq.restype = FW_RI_RES_TYPE_SRQ; res->u.srq.op = FW_RI_RES_OP_WRITE; /* * eqsize is the number of 64B entries plus the status page size. */ eqsize = wq->size * T4_RQ_NUM_SLOTS + rdev->hw_queue.t4_eq_status_entries; res->u.srq.eqid = cpu_to_be32(wq->qid); res->u.srq.fetchszm_to_iqid = /* no host cidx updates */ cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ FW_RI_RES_WR_FETCHRO_V(0)); /* relaxed_ordering */ res->u.srq.dcaen_to_eqsize = cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | FW_RI_RES_WR_DCACPU_V(0) | FW_RI_RES_WR_FBMIN_V(2) | FW_RI_RES_WR_FBMAX_V(3) | FW_RI_RES_WR_CIDXFTHRESHO_V(0) | FW_RI_RES_WR_CIDXFTHRESH_V(0) | FW_RI_RES_WR_EQSIZE_V(eqsize)); res->u.srq.eqaddr = cpu_to_be64(wq->dma_addr); res->u.srq.srqid = cpu_to_be32(srq->idx); res->u.srq.pdid = cpu_to_be32(srq->pdid); res->u.srq.hwsrqsize = cpu_to_be32(wq->rqt_size); res->u.srq.hwsrqaddr = cpu_to_be32(wq->rqt_hwaddr - rdev->lldi.vr->rq.start); c4iw_init_wr_wait(wr_waitp); ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->qid, __func__); if (ret) goto err_free_queue; pr_debug("%s srq %u eqid %u pdid %u queue va %p pa 0x%llx\n" " bar2_addr %p rqt addr 0x%x size %d\n", __func__, srq->idx, wq->qid, srq->pdid, wq->queue, (u64)virt_to_phys(wq->queue), wq->bar2_va, wq->rqt_hwaddr, wq->rqt_size); return 0; err_free_queue: dma_free_coherent(&rdev->lldi.pdev->dev, wq->memsize, wq->queue, dma_unmap_addr(wq, mapping)); err_free_rqtpool: c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); err_free_pending_wrs: if (!user) kfree(wq->pending_wrs); err_free_sw_rq: if (!user) kfree(wq->sw_rq); err_put_qpid: c4iw_put_qpid(rdev, wq->qid, uctx); err: return ret; } void c4iw_copy_wr_to_srq(struct t4_srq *srq, union t4_recv_wr *wqe, u8 len16) { u64 *src, *dst; src = (u64 *)wqe; dst = (u64 *)((u8 *)srq->queue + srq->wq_pidx * T4_EQ_ENTRY_SIZE); while (len16) { *dst++ = *src++; if (dst >= (u64 *)&srq->queue[srq->size]) dst = (u64 *)srq->queue; *dst++ = *src++; if (dst >= (u64 *)&srq->queue[srq->size]) dst = (u64 *)srq->queue; len16--; } } int c4iw_create_srq(struct ib_srq *ib_srq, struct ib_srq_init_attr *attrs, struct ib_udata *udata) { struct ib_pd *pd = ib_srq->pd; struct c4iw_dev *rhp; struct c4iw_srq *srq = to_c4iw_srq(ib_srq); struct c4iw_pd *php; struct c4iw_create_srq_resp uresp; struct c4iw_ucontext *ucontext; struct c4iw_mm_entry *srq_key_mm, *srq_db_key_mm; int rqsize; int ret; int wr_len; if (attrs->srq_type != IB_SRQT_BASIC) return -EOPNOTSUPP; pr_debug("%s ib_pd %p\n", __func__, pd); php = to_c4iw_pd(pd); rhp = php->rhp; if (!rhp->rdev.lldi.vr->srq.size) return -EINVAL; if (attrs->attr.max_wr > rhp->rdev.hw_queue.t4_max_rq_size) return -E2BIG; if (attrs->attr.max_sge > T4_MAX_RECV_SGE) return -E2BIG; /* * SRQ RQT and RQ must be a power of 2 and at least 16 deep. */ rqsize = attrs->attr.max_wr + 1; rqsize = roundup_pow_of_two(max_t(u16, rqsize, 16)); ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, ibucontext); srq->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); if (!srq->wr_waitp) return -ENOMEM; srq->idx = c4iw_alloc_srq_idx(&rhp->rdev); if (srq->idx < 0) { ret = -ENOMEM; goto err_free_wr_wait; } wr_len = sizeof(struct fw_ri_res_wr) + sizeof(struct fw_ri_res); srq->destroy_skb = alloc_skb(wr_len, GFP_KERNEL); if (!srq->destroy_skb) { ret = -ENOMEM; goto err_free_srq_idx; } srq->rhp = rhp; srq->pdid = php->pdid; srq->wq.size = rqsize; srq->wq.memsize = (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * sizeof(*srq->wq.queue); if (ucontext) srq->wq.memsize = roundup(srq->wq.memsize, PAGE_SIZE); ret = alloc_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, srq->wr_waitp); if (ret) goto err_free_skb; attrs->attr.max_wr = rqsize - 1; if (CHELSIO_CHIP_VERSION(rhp->rdev.lldi.adapter_type) > CHELSIO_T6) srq->flags = T4_SRQ_LIMIT_SUPPORT; if (udata) { srq_key_mm = kmalloc(sizeof(*srq_key_mm), GFP_KERNEL); if (!srq_key_mm) { ret = -ENOMEM; goto err_free_queue; } srq_db_key_mm = kmalloc(sizeof(*srq_db_key_mm), GFP_KERNEL); if (!srq_db_key_mm) { ret = -ENOMEM; goto err_free_srq_key_mm; } memset(&uresp, 0, sizeof(uresp)); uresp.flags = srq->flags; uresp.qid_mask = rhp->rdev.qpmask; uresp.srqid = srq->wq.qid; uresp.srq_size = srq->wq.size; uresp.srq_memsize = srq->wq.memsize; uresp.rqt_abs_idx = srq->wq.rqt_abs_idx; spin_lock(&ucontext->mmap_lock); uresp.srq_key = ucontext->key; ucontext->key += PAGE_SIZE; uresp.srq_db_gts_key = ucontext->key; ucontext->key += PAGE_SIZE; spin_unlock(&ucontext->mmap_lock); ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); if (ret) goto err_free_srq_db_key_mm; srq_key_mm->key = uresp.srq_key; srq_key_mm->addr = virt_to_phys(srq->wq.queue); srq_key_mm->len = PAGE_ALIGN(srq->wq.memsize); insert_mmap(ucontext, srq_key_mm); srq_db_key_mm->key = uresp.srq_db_gts_key; srq_db_key_mm->addr = (u64)(unsigned long)srq->wq.bar2_pa; srq_db_key_mm->len = PAGE_SIZE; insert_mmap(ucontext, srq_db_key_mm); } pr_debug("%s srq qid %u idx %u size %u memsize %lu num_entries %u\n", __func__, srq->wq.qid, srq->idx, srq->wq.size, (unsigned long)srq->wq.memsize, attrs->attr.max_wr); spin_lock_init(&srq->lock); return 0; err_free_srq_db_key_mm: kfree(srq_db_key_mm); err_free_srq_key_mm: kfree(srq_key_mm); err_free_queue: free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, srq->wr_waitp); err_free_skb: kfree_skb(srq->destroy_skb); err_free_srq_idx: c4iw_free_srq_idx(&rhp->rdev, srq->idx); err_free_wr_wait: c4iw_put_wr_wait(srq->wr_waitp); return ret; } int c4iw_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) { struct c4iw_dev *rhp; struct c4iw_srq *srq; struct c4iw_ucontext *ucontext; srq = to_c4iw_srq(ibsrq); rhp = srq->rhp; pr_debug("%s id %d\n", __func__, srq->wq.qid); ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, ibucontext); free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, srq->wr_waitp); c4iw_free_srq_idx(&rhp->rdev, srq->idx); c4iw_put_wr_wait(srq->wr_waitp); return 0; }
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