--- /dev/null
+/*
+ * 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 "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 immedate");
+
+static int alloc_ird(struct c4iw_dev *dev, u32 ird)
+{
+ int ret = 0;
+
+ spin_lock_irq(&dev->lock);
+ if (ird <= dev->avail_ird)
+ dev->avail_ird -= ird;
+ else
+ ret = -ENOMEM;
+ spin_unlock_irq(&dev->lock);
+
+ 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)
+{
+ spin_lock_irq(&dev->lock);
+ dev->avail_ird += ird;
+ spin_unlock_irq(&dev->lock);
+}
+
+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,
+ pci_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);
+ pci_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)
+{
+ /*
+ * uP clears EQ contexts when the connection exits rdma mode,
+ * so no need to post a RESET WR for these EQs.
+ */
+ dma_free_coherent(&(rdev->lldi.pdev->dev),
+ wq->rq.memsize, wq->rq.queue,
+ dma_unmap_addr(&wq->rq, mapping));
+ dealloc_sq(rdev, &wq->sq);
+ c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
+ kfree(wq->rq.sw_rq);
+ kfree(wq->sq.sw_sq);
+ c4iw_put_qpid(rdev, wq->rq.qid, uctx);
+ c4iw_put_qpid(rdev, wq->sq.qid, uctx);
+ return 0;
+}
+
+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)
+{
+ int user = (uctx != &rdev->uctx);
+ struct fw_ri_res_wr *res_wr;
+ struct fw_ri_res *res;
+ int wr_len;
+ struct c4iw_wr_wait wr_wait;
+ struct sk_buff *skb;
+ int ret = 0;
+ int eqsize;
+
+ wq->sq.qid = c4iw_get_qpid(rdev, uctx);
+ if (!wq->sq.qid)
+ return -ENOMEM;
+
+ wq->rq.qid = c4iw_get_qpid(rdev, uctx);
+ if (!wq->rq.qid) {
+ ret = -ENOMEM;
+ goto free_sq_qid;
+ }
+
+ if (!user) {
+ wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
+ GFP_KERNEL);
+ if (!wq->sq.sw_sq) {
+ ret = -ENOMEM;
+ goto free_rq_qid;
+ }
+
+ wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq,
+ GFP_KERNEL);
+ if (!wq->rq.sw_rq) {
+ ret = -ENOMEM;
+ goto free_sw_sq;
+ }
+ }
+
+ /*
+ * 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);
+
+ 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;
+ }
+ PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n",
+ __func__, wq->sq.queue,
+ (unsigned long long)virt_to_phys(wq->sq.queue),
+ wq->rq.queue,
+ (unsigned long long)virt_to_phys(wq->rq.queue));
+ memset(wq->rq.queue, 0, wq->rq.memsize);
+ dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
+
+ wq->db = rdev->lldi.db_reg;
+ wq->gts = rdev->lldi.gts_reg;
+ if (user || is_t5(rdev->lldi.adapter_type)) {
+ u32 off;
+
+ off = (wq->sq.qid << rdev->qpshift) & PAGE_MASK;
+ if (user) {
+ wq->sq.udb = (u64 __iomem *)(rdev->bar2_pa + off);
+ } else {
+ off += 128 * (wq->sq.qid & rdev->qpmask) + 8;
+ wq->sq.udb = (u64 __iomem *)(rdev->bar2_kva + off);
+ }
+ off = (wq->rq.qid << rdev->qpshift) & PAGE_MASK;
+ if (user) {
+ wq->rq.udb = (u64 __iomem *)(rdev->bar2_pa + off);
+ } else {
+ off += 128 * (wq->rq.qid & rdev->qpmask) + 8;
+ wq->rq.udb = (u64 __iomem *)(rdev->bar2_kva + off);
+ }
+ }
+ wq->rdev = rdev;
+ wq->rq.msn = 1;
+
+ /* build fw_ri_res_wr */
+ wr_len = sizeof *res_wr + 2 * 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 = (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(2) |
+ FW_WR_COMPL_F);
+ res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16));
+ res_wr->cookie = (uintptr_t)&wr_wait;
+ 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) |
+ FW_RI_RES_WR_FBMAX_V(2) |
+ 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);
+ 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 = 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 */
+ 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(2) |
+ 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_wait);
+
+ ret = c4iw_ofld_send(rdev, skb);
+ if (ret)
+ goto free_dma;
+ ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, __func__);
+ if (ret)
+ goto free_dma;
+
+ PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%lx rqudb 0x%lx\n",
+ __func__, wq->sq.qid, wq->rq.qid, wq->db,
+ (__force unsigned long) wq->sq.udb,
+ (__force unsigned long) wq->rq.udb);
+
+ return 0;
+free_dma:
+ 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:
+ c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
+free_sw_rq:
+ kfree(wq->rq.sw_rq);
+free_sw_sq:
+ kfree(wq->sq.sw_sq);
+free_rq_qid:
+ 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,
+ 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 = (__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,
+ 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,
+ struct ib_send_wr *wr, u8 *len16)
+{
+ u32 plen;
+ int size;
+ int ret;
+
+ if (wr->num_sge > T4_MAX_SEND_SGE)
+ return -EINVAL;
+ wqe->write.r2 = 0;
+ wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
+ wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.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 int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
+{
+ if (wr->num_sge > 1)
+ return -EINVAL;
+ if (wr->num_sge) {
+ wqe->read.stag_src = cpu_to_be32(wr->wr.rdma.rkey);
+ wqe->read.to_src_hi = cpu_to_be32((u32)(wr->wr.rdma.remote_addr
+ >> 32));
+ wqe->read.to_src_lo = cpu_to_be32((u32)wr->wr.rdma.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 int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
+ 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_fastreg(struct t4_sq *sq, union t4_wr *wqe,
+ struct ib_send_wr *wr, u8 *len16, u8 t5dev)
+{
+
+ struct fw_ri_immd *imdp;
+ __be64 *p;
+ int i;
+ int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32);
+ int rem;
+
+ if (wr->wr.fast_reg.page_list_len >
+ t4_max_fr_depth(use_dsgl))
+ return -EINVAL;
+
+ wqe->fr.qpbinde_to_dcacpu = 0;
+ wqe->fr.pgsz_shift = wr->wr.fast_reg.page_shift - 12;
+ wqe->fr.addr_type = FW_RI_VA_BASED_TO;
+ wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->wr.fast_reg.access_flags);
+ wqe->fr.len_hi = 0;
+ wqe->fr.len_lo = cpu_to_be32(wr->wr.fast_reg.length);
+ wqe->fr.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
+ wqe->fr.va_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
+ wqe->fr.va_lo_fbo = cpu_to_be32(wr->wr.fast_reg.iova_start &
+ 0xffffffff);
+
+ if (t5dev && use_dsgl && (pbllen > max_fr_immd)) {
+ struct c4iw_fr_page_list *c4pl =
+ to_c4iw_fr_page_list(wr->wr.fast_reg.page_list);
+ struct fw_ri_dsgl *sglp;
+
+ for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
+ wr->wr.fast_reg.page_list->page_list[i] = (__force u64)
+ cpu_to_be64((u64)
+ wr->wr.fast_reg.page_list->page_list[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(c4pl->dma_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 < wr->wr.fast_reg.page_list_len; i++) {
+ *p = cpu_to_be64(
+ (u64)wr->wr.fast_reg.page_list->page_list[i]);
+ rem -= sizeof(*p);
+ if (++p == (__be64 *)&sq->queue[sq->size])
+ p = (__be64 *)sq->queue;
+ }
+ BUG_ON(rem < 0);
+ 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, 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)
+{
+ PDBG("%s ib_qp %p\n", __func__, qp);
+ atomic_inc(&(to_c4iw_qp(qp)->refcnt));
+}
+
+void c4iw_qp_rem_ref(struct ib_qp *qp)
+{
+ PDBG("%s ib_qp %p\n", __func__, qp);
+ if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt)))
+ wake_up(&(to_c4iw_qp(qp)->wait));
+}
+
+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;
+
+ spin_lock_irqsave(&qhp->rhp->lock, flags);
+ spin_lock(&qhp->lock);
+ if (qhp->rhp->db_state == NORMAL)
+ t4_ring_sq_db(&qhp->wq, inc,
+ is_t5(qhp->rhp->rdev.lldi.adapter_type), 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);
+ spin_unlock_irqrestore(&qhp->rhp->lock, flags);
+ return 0;
+}
+
+static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&qhp->rhp->lock, flags);
+ spin_lock(&qhp->lock);
+ if (qhp->rhp->db_state == NORMAL)
+ t4_ring_rq_db(&qhp->wq, inc,
+ is_t5(qhp->rhp->rdev.lldi.adapter_type), 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);
+ spin_unlock_irqrestore(&qhp->rhp->lock, flags);
+ return 0;
+}
+
+int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ 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;
+ union t4_wr *wqe = NULL;
+ u32 num_wrs;
+ struct t4_swsqe *swsqe;
+ unsigned long flag;
+ u16 idx = 0;
+
+ qhp = to_c4iw_qp(ibqp);
+ spin_lock_irqsave(&qhp->lock, flag);
+ if (t4_wq_in_error(&qhp->wq)) {
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ return -EINVAL;
+ }
+ num_wrs = t4_sq_avail(&qhp->wq);
+ if (num_wrs == 0) {
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ return -ENOMEM;
+ }
+ 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:
+ 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)
+ 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_FAST_REG_MR:
+ fw_opcode = FW_RI_FR_NSMR_WR;
+ swsqe->opcode = FW_RI_FAST_REGISTER;
+ err = build_fastreg(&qhp->wq.sq, wqe, wr, &len16,
+ is_t5(
+ qhp->rhp->rdev.lldi.adapter_type) ?
+ 1 : 0);
+ 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);
+ break;
+ default:
+ PDBG("%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(
+ qhp->rhp->rdev.lldi.ports[0]);
+ getnstimeofday(&swsqe->host_ts);
+ }
+
+ init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16);
+
+ PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n",
+ __func__, (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 (!qhp->rhp->rdev.status_page->db_off) {
+ t4_ring_sq_db(&qhp->wq, idx,
+ is_t5(qhp->rhp->rdev.lldi.adapter_type), 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, struct ib_recv_wr *wr,
+ 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 (t4_wq_in_error(&qhp->wq)) {
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ return -EINVAL;
+ }
+ num_wrs = t4_rq_avail(&qhp->wq);
+ if (num_wrs == 0) {
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ 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]);
+ getnstimeofday(
+ &qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_ts);
+ }
+
+ 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;
+ PDBG("%s cookie 0x%llx pidx %u\n", __func__,
+ (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,
+ is_t5(qhp->rhp->rdev.lldi.adapter_type), wqe);
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ } else {
+ spin_unlock_irqrestore(&qhp->lock, flag);
+ ring_kernel_rq_db(qhp, idx);
+ }
+ return err;
+}
+
+int c4iw_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind)
+{
+ return -ENOSYS;
+}
+
+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;
+
+ PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
+ qhp->ep->hwtid);
+
+ skb = alloc_skb(sizeof *wqe, gfp);
+ if (!skb)
+ return;
+ set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
+
+ wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
+ memset(wqe, 0, 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, sq_flushed;
+ unsigned long flag;
+
+ PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
+
+ /* locking hierarchy: cq lock first, then qp lock. */
+ spin_lock_irqsave(&rchp->lock, flag);
+ spin_lock(&qhp->lock);
+
+ if (qhp->wq.flushed) {
+ spin_unlock(&qhp->lock);
+ spin_unlock_irqrestore(&rchp->lock, flag);
+ return;
+ }
+ qhp->wq.flushed = 1;
+
+ c4iw_flush_hw_cq(rchp);
+ c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
+ rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
+ spin_unlock(&qhp->lock);
+ spin_unlock_irqrestore(&rchp->lock, flag);
+
+ /* locking hierarchy: cq lock first, then qp lock. */
+ spin_lock_irqsave(&schp->lock, flag);
+ spin_lock(&qhp->lock);
+ if (schp != rchp)
+ c4iw_flush_hw_cq(schp);
+ sq_flushed = c4iw_flush_sq(qhp);
+ spin_unlock(&qhp->lock);
+ spin_unlock_irqrestore(&schp->lock, flag);
+
+ if (schp == rchp) {
+ if (t4_clear_cq_armed(&rchp->cq) &&
+ (rq_flushed || sq_flushed)) {
+ 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 (t4_clear_cq_armed(&rchp->cq) && rq_flushed) {
+ 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 (t4_clear_cq_armed(&schp->cq) && sq_flushed) {
+ 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);
+
+ t4_set_wq_in_error(&qhp->wq);
+ if (qhp->ibqp.uobject) {
+ 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;
+
+ PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
+ ep->hwtid);
+
+ skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
+ memset(wqe, 0, 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_wait;
+
+ wqe->u.fini.type = FW_RI_TYPE_FINI;
+ ret = c4iw_ofld_send(&rhp->rdev, skb);
+ if (ret)
+ goto out;
+
+ ret = c4iw_wait_for_reply(&rhp->rdev, &ep->com.wr_wait, qhp->ep->hwtid,
+ qhp->wq.sq.qid, __func__);
+out:
+ PDBG("%s ret %d\n", __func__, ret);
+ return ret;
+}
+
+static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init)
+{
+ PDBG("%s p2p_type = %d\n", __func__, 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;
+
+ PDBG("%s qhp %p qid 0x%x tid %u ird %u ord %u\n", __func__, 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 = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
+ memset(wqe, 0, 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_wait;
+
+ 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);
+ wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid);
+ 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);
+ 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);
+ if (qhp->attr.mpa_attr.initiator)
+ build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init);
+
+ ret = c4iw_ofld_send(&rhp->rdev, skb);
+ if (ret)
+ goto err1;
+
+ ret = c4iw_wait_for_reply(&rhp->rdev, &qhp->ep->com.wr_wait,
+ qhp->ep->hwtid, qhp->wq.sq.qid, __func__);
+ if (!ret)
+ goto out;
+err1:
+ free_ird(rhp, qhp->attr.max_ird);
+out:
+ PDBG("%s ret %d\n", __func__, 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;
+
+ PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__,
+ 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:
+ BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
+ t4_set_wq_in_error(&qhp->wq);
+ 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);
+ 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(&qhp->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);
+ set_state(qhp, C4IW_QP_STATE_ERROR);
+ if (!internal) {
+ abort = 1;
+ 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:
+ if (!internal) {
+ 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:
+ printk(KERN_ERR "%s in a bad state %d\n",
+ __func__, qhp->attr.state);
+ ret = -EINVAL;
+ goto err;
+ break;
+ }
+ goto out;
+err:
+ PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, 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;
+ BUG_ON(!ep);
+ 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);
+ PDBG("%s exit state %d\n", __func__, qhp->attr.state);
+ return ret;
+}
+
+int c4iw_destroy_qp(struct ib_qp *ib_qp)
+{
+ struct c4iw_dev *rhp;
+ struct c4iw_qp *qhp;
+ struct c4iw_qp_attributes attrs;
+ struct c4iw_ucontext *ucontext;
+
+ qhp = to_c4iw_qp(ib_qp);
+ rhp = qhp->rhp;
+
+ 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);
+
+ remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
+ atomic_dec(&qhp->refcnt);
+ wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
+
+ spin_lock_irq(&rhp->lock);
+ if (!list_empty(&qhp->db_fc_entry))
+ list_del_init(&qhp->db_fc_entry);
+ spin_unlock_irq(&rhp->lock);
+ free_ird(rhp, qhp->attr.max_ird);
+
+ ucontext = ib_qp->uobject ?
+ to_c4iw_ucontext(ib_qp->uobject->context) : NULL;
+ destroy_qp(&rhp->rdev, &qhp->wq,
+ ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
+
+ PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid);
+ kfree(qhp);
+ return 0;
+}
+
+struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
+ struct ib_udata *udata)
+{
+ struct c4iw_dev *rhp;
+ struct c4iw_qp *qhp;
+ struct c4iw_pd *php;
+ struct c4iw_cq *schp;
+ struct c4iw_cq *rchp;
+ struct c4iw_create_qp_resp uresp;
+ unsigned int sqsize, rqsize;
+ struct c4iw_ucontext *ucontext;
+ int ret;
+ struct c4iw_mm_entry *mm1, *mm2, *mm3, *mm4, *mm5 = NULL;
+
+ PDBG("%s ib_pd %p\n", __func__, pd);
+
+ if (attrs->qp_type != IB_QPT_RC)
+ return ERR_PTR(-EINVAL);
+
+ 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 ERR_PTR(-EINVAL);
+
+ if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE)
+ return ERR_PTR(-EINVAL);
+
+ if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size)
+ return ERR_PTR(-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 ERR_PTR(-E2BIG);
+ sqsize = attrs->cap.max_send_wr + 1;
+ if (sqsize < 8)
+ sqsize = 8;
+
+ ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
+
+ qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
+ if (!qhp)
+ return ERR_PTR(-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;
+ 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);
+ 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);
+ if (ret)
+ goto err1;
+
+ 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.rq_num_entries = attrs->cap.max_recv_wr;
+ qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
+ qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
+ 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);
+ atomic_set(&qhp->refcnt, 1);
+
+ ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
+ if (ret)
+ goto err2;
+
+ if (udata) {
+ mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
+ if (!mm1) {
+ ret = -ENOMEM;
+ goto err3;
+ }
+ mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
+ if (!mm2) {
+ ret = -ENOMEM;
+ goto err4;
+ }
+ mm3 = kmalloc(sizeof *mm3, GFP_KERNEL);
+ if (!mm3) {
+ ret = -ENOMEM;
+ goto err5;
+ }
+ mm4 = kmalloc(sizeof *mm4, GFP_KERNEL);
+ if (!mm4) {
+ ret = -ENOMEM;
+ goto err6;
+ }
+ if (t4_sq_onchip(&qhp->wq.sq)) {
+ mm5 = kmalloc(sizeof *mm5, GFP_KERNEL);
+ if (!mm5) {
+ ret = -ENOMEM;
+ goto err7;
+ }
+ uresp.flags = C4IW_QPF_ONCHIP;
+ } else
+ uresp.flags = 0;
+ 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;
+ 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 (mm5) {
+ uresp.ma_sync_key = ucontext->key;
+ ucontext->key += PAGE_SIZE;
+ } else {
+ uresp.ma_sync_key = 0;
+ }
+ uresp.sq_key = ucontext->key;
+ ucontext->key += PAGE_SIZE;
+ uresp.rq_key = ucontext->key;
+ ucontext->key += PAGE_SIZE;
+ uresp.sq_db_gts_key = ucontext->key;
+ ucontext->key += PAGE_SIZE;
+ 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 err8;
+ mm1->key = uresp.sq_key;
+ mm1->addr = qhp->wq.sq.phys_addr;
+ mm1->len = PAGE_ALIGN(qhp->wq.sq.memsize);
+ insert_mmap(ucontext, mm1);
+ mm2->key = uresp.rq_key;
+ mm2->addr = virt_to_phys(qhp->wq.rq.queue);
+ mm2->len = PAGE_ALIGN(qhp->wq.rq.memsize);
+ insert_mmap(ucontext, mm2);
+ mm3->key = uresp.sq_db_gts_key;
+ mm3->addr = (__force unsigned long)qhp->wq.sq.udb;
+ mm3->len = PAGE_SIZE;
+ insert_mmap(ucontext, mm3);
+ mm4->key = uresp.rq_db_gts_key;
+ mm4->addr = (__force unsigned long)qhp->wq.rq.udb;
+ mm4->len = PAGE_SIZE;
+ insert_mmap(ucontext, mm4);
+ if (mm5) {
+ mm5->key = uresp.ma_sync_key;
+ mm5->addr = (pci_resource_start(rhp->rdev.lldi.pdev, 0)
+ + PCIE_MA_SYNC_A) & PAGE_MASK;
+ mm5->len = PAGE_SIZE;
+ insert_mmap(ucontext, mm5);
+ }
+ }
+ qhp->ibqp.qp_num = qhp->wq.sq.qid;
+ init_timer(&(qhp->timer));
+ INIT_LIST_HEAD(&qhp->db_fc_entry);
+ PDBG("%s sq id %u size %u memsize %zu num_entries %u "
+ "rq id %u size %u memsize %zu num_entries %u\n", __func__,
+ 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 &qhp->ibqp;
+err8:
+ kfree(mm5);
+err7:
+ kfree(mm4);
+err6:
+ kfree(mm3);
+err5:
+ kfree(mm2);
+err4:
+ kfree(mm1);
+err3:
+ remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
+err2:
+ destroy_qp(&rhp->rdev, &qhp->wq,
+ ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
+err1:
+ kfree(qhp);
+ return ERR_PTR(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;
+
+ PDBG("%s ib_qp %p\n", __func__, ibqp);
+
+ /* 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;
+
+ memset(&attrs, 0, sizeof attrs);
+ 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_t5(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)
+{
+ PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
+ return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn);
+}
+
+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);
+ 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.sq_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;
+}
Code Review / kvmfornfv.git / blobdiff