- Add srq create/destroy/modify to support kernel mode
- Add post_srq function
- Update poll_cq code to deal with srqs
- Handle kernel mode SRQ_LIMIT events
- Handle flushed SRQ buffers
Signed-off-by: Raju Rangoju <rajur@xxxxxxxxxxx>
Reviewed-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/cxgb4/cm.c | 42 +-
drivers/infiniband/hw/cxgb4/cq.c | 176 ++++++-
drivers/infiniband/hw/cxgb4/device.c | 19 +-
drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 3 +-
drivers/infiniband/hw/cxgb4/provider.c | 10 +-
drivers/infiniband/hw/cxgb4/qp.c | 822 +++++++++++++++++++++++++++------
drivers/infiniband/hw/cxgb4/resource.c | 51 +-
drivers/infiniband/hw/cxgb4/t4.h | 17 +-
include/uapi/rdma/cxgb4-abi.h | 12 +-
9 files changed, 980 insertions(+), 172 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 4cf17c650c36..e758b6783b3b 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -1853,10 +1853,34 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
return 0;
}
+static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx_status)
+{
+ enum chip_type adapter_type;
+ u32 srqidx;
+ u8 status;
+
+ adapter_type = ep->com.dev->rdev.lldi.adapter_type;
+ status = ABORT_RSS_STATUS_G(be32_to_cpu(srqidx_status));
+ srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(srqidx_status));
+
+ /*
+ * If this TCB had a srq buffer cached, then we must complete
+ * it. For user mode, that means saving the srqidx in the
+ * user/kernel status page for this qp. For kernel mode, just
+ * synthesize the CQE now.
+ */
+ if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
+ if (ep->com.qp->ibqp.uobject)
+ t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
+ else
+ c4iw_flush_srqidx(ep->com.qp, srqidx);
+ }
+}
+
static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
struct c4iw_ep *ep;
- struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+ struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
int release = 0;
unsigned int tid = GET_TID(rpl);
@@ -1865,6 +1889,9 @@ static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
pr_warn("Abort rpl to freed endpoint\n");
return 0;
}
+
+ complete_cached_srq_buffers(ep, rpl->srqidx_status);
+
pr_debug("ep %p tid %u\n", ep, ep->hwtid);
mutex_lock(&ep->com.mutex);
switch (ep->com.state) {
@@ -2719,28 +2746,35 @@ static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
{
- struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct cpl_abort_req_rss6 *req = cplhdr(skb);
struct c4iw_ep *ep;
struct sk_buff *rpl_skb;
struct c4iw_qp_attributes attrs;
int ret;
int release = 0;
unsigned int tid = GET_TID(req);
+ u8 status;
+
u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
ep = get_ep_from_tid(dev, tid);
if (!ep)
return 0;
- if (cxgb_is_neg_adv(req->status)) {
+ status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
+
+ if (cxgb_is_neg_adv(status)) {
pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
- ep->hwtid, req->status, neg_adv_str(req->status));
+ ep->hwtid, status, neg_adv_str(status));
ep->stats.abort_neg_adv++;
mutex_lock(&dev->rdev.stats.lock);
dev->rdev.stats.neg_adv++;
mutex_unlock(&dev->rdev.stats.lock);
goto deref_ep;
}
+
+ complete_cached_srq_buffers(ep, req->srqidx_status);
+
pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
ep->com.state);
set_bit(PEER_ABORT, &ep->com.history);
diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index 6f2b26126c64..cc95a9c270ae 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -132,7 +132,7 @@ static int create_cq(struct c4iw_rdev *rdev, struct t4_cq *cq,
FW_RI_RES_WR_IQPCIECH_V(2) |
FW_RI_RES_WR_IQINTCNTTHRESH_V(0) |
FW_RI_RES_WR_IQO_F |
- FW_RI_RES_WR_IQESIZE_V(1));
+ FW_RI_RES_WR_IQESIZE_V(ilog2(sizeof(*cq->queue)) - 4));
res->u.cq.iqsize = cpu_to_be16(cq->size);
res->u.cq.iqaddr = cpu_to_be64(cq->dma_addr);
@@ -166,7 +166,7 @@ static int create_cq(struct c4iw_rdev *rdev, struct t4_cq *cq,
return ret;
}
-static void insert_recv_cqe(struct t4_wq *wq, struct t4_cq *cq)
+static void insert_recv_cqe(struct t4_wq *wq, struct t4_cq *cq, u32 srqidx)
{
struct t4_cqe cqe;
@@ -179,6 +179,8 @@ static void insert_recv_cqe(struct t4_wq *wq, struct t4_cq *cq)
CQE_SWCQE_V(1) |
CQE_QPID_V(wq->sq.qid));
cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen));
+ if (srqidx)
+ cqe.u.srcqe.abs_rqe_idx = cpu_to_be32(srqidx);
cq->sw_queue[cq->sw_pidx] = cqe;
t4_swcq_produce(cq);
}
@@ -191,7 +193,7 @@ int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count)
pr_debug("wq %p cq %p rq.in_use %u skip count %u\n",
wq, cq, wq->rq.in_use, count);
while (in_use--) {
- insert_recv_cqe(wq, cq);
+ insert_recv_cqe(wq, cq, 0);
flushed++;
}
return flushed;
@@ -433,6 +435,72 @@ void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count)
pr_debug("cq %p count %d\n", cq, *count);
}
+static void post_pending_srq_wrs(struct t4_srq *srq)
+{
+ struct t4_srq_pending_wr *pwr;
+ u16 idx = 0;
+
+ while (srq->pending_in_use) {
+ pwr = &srq->pending_wrs[srq->pending_cidx];
+ srq->sw_rq[srq->pidx].wr_id = pwr->wr_id;
+ srq->sw_rq[srq->pidx].valid = 1;
+
+ pr_debug("%s posting pending cidx %u pidx %u wq_pidx %u in_use %u rq_size %u wr_id %llx\n",
+ __func__,
+ srq->cidx, srq->pidx, srq->wq_pidx,
+ srq->in_use, srq->size,
+ (unsigned long long)pwr->wr_id);
+
+ c4iw_copy_wr_to_srq(srq, &pwr->wqe, pwr->len16);
+ t4_srq_consume_pending_wr(srq);
+ t4_srq_produce(srq, pwr->len16);
+ idx += DIV_ROUND_UP(pwr->len16 * 16, T4_EQ_ENTRY_SIZE);
+ }
+
+ if (idx) {
+ t4_ring_srq_db(srq, idx, pwr->len16, &pwr->wqe);
+ srq->queue[srq->size].status.host_wq_pidx =
+ srq->wq_pidx;
+ }
+}
+
+static u64 reap_srq_cqe(struct t4_cqe *hw_cqe, struct t4_srq *srq)
+{
+ int rel_idx = CQE_ABS_RQE_IDX(hw_cqe) - srq->rqt_abs_idx;
+ u64 wr_id;
+
+ srq->sw_rq[rel_idx].valid = 0;
+ wr_id = srq->sw_rq[rel_idx].wr_id;
+
+ if (rel_idx == srq->cidx) {
+ pr_debug("%s in order cqe rel_idx %u cidx %u pidx %u wq_pidx %u in_use %u rq_size %u wr_id %llx\n",
+ __func__, rel_idx, srq->cidx, srq->pidx,
+ srq->wq_pidx, srq->in_use, srq->size,
+ (unsigned long long)srq->sw_rq[rel_idx].wr_id);
+ t4_srq_consume(srq);
+ while (srq->ooo_count && !srq->sw_rq[srq->cidx].valid) {
+ pr_debug("%s eat ooo cidx %u pidx %u wq_pidx %u in_use %u rq_size %u ooo_count %u wr_id %llx\n",
+ __func__, srq->cidx, srq->pidx,
+ srq->wq_pidx, srq->in_use,
+ srq->size, srq->ooo_count,
+ (unsigned long long)
+ srq->sw_rq[srq->cidx].wr_id);
+ t4_srq_consume_ooo(srq);
+ }
+ if (srq->ooo_count == 0 && srq->pending_in_use)
+ post_pending_srq_wrs(srq);
+ } else {
+ pr_debug("%s ooo cqe rel_idx %u cidx %u pidx %u wq_pidx %u in_use %u rq_size %u ooo_count %u wr_id %llx\n",
+ __func__, rel_idx, srq->cidx,
+ srq->pidx, srq->wq_pidx,
+ srq->in_use, srq->size,
+ srq->ooo_count,
+ (unsigned long long)srq->sw_rq[rel_idx].wr_id);
+ t4_srq_produce_ooo(srq);
+ }
+ return wr_id;
+}
+
/*
* poll_cq
*
@@ -450,7 +518,8 @@ void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count)
* -EOVERFLOW CQ overflow detected.
*/
static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
- u8 *cqe_flushed, u64 *cookie, u32 *credit)
+ u8 *cqe_flushed, u64 *cookie, u32 *credit,
+ struct t4_srq *srq)
{
int ret = 0;
struct t4_cqe *hw_cqe, read_cqe;
@@ -515,7 +584,7 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
*/
if (CQE_TYPE(hw_cqe) == 1) {
if (CQE_STATUS(hw_cqe))
- t4_set_wq_in_error(wq);
+ t4_set_wq_in_error(wq, 0);
ret = -EAGAIN;
goto skip_cqe;
}
@@ -526,7 +595,7 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
*/
if (CQE_WRID_STAG(hw_cqe) == 1) {
if (CQE_STATUS(hw_cqe))
- t4_set_wq_in_error(wq);
+ t4_set_wq_in_error(wq, 0);
ret = -EAGAIN;
goto skip_cqe;
}
@@ -551,7 +620,7 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
if (CQE_STATUS(hw_cqe) || t4_wq_in_error(wq)) {
*cqe_flushed = (CQE_STATUS(hw_cqe) == T4_ERR_SWFLUSH);
- t4_set_wq_in_error(wq);
+ t4_set_wq_in_error(wq, 0);
}
/*
@@ -565,15 +634,9 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
* then we complete this with T4_ERR_MSN and mark the wq in
* error.
*/
-
- if (t4_rq_empty(wq)) {
- t4_set_wq_in_error(wq);
- ret = -EAGAIN;
- goto skip_cqe;
- }
if (unlikely(!CQE_STATUS(hw_cqe) &&
CQE_WRID_MSN(hw_cqe) != wq->rq.msn)) {
- t4_set_wq_in_error(wq);
+ t4_set_wq_in_error(wq, 0);
hw_cqe->header |= cpu_to_be32(CQE_STATUS_V(T4_ERR_MSN));
}
goto proc_cqe;
@@ -632,11 +695,16 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
c4iw_log_wr_stats(wq, hw_cqe);
t4_sq_consume(wq);
} else {
- pr_debug("completing rq idx %u\n", wq->rq.cidx);
- *cookie = wq->rq.sw_rq[wq->rq.cidx].wr_id;
- if (c4iw_wr_log)
- c4iw_log_wr_stats(wq, hw_cqe);
- t4_rq_consume(wq);
+ if (!srq) {
+ pr_debug("completing rq idx %u\n", wq->rq.cidx);
+ *cookie = wq->rq.sw_rq[wq->rq.cidx].wr_id;
+ if (c4iw_wr_log)
+ c4iw_log_wr_stats(wq, hw_cqe);
+ t4_rq_consume(wq);
+ } else {
+ *cookie = reap_srq_cqe(hw_cqe, srq);
+ }
+ wq->rq.msn++;
goto skip_cqe;
}
@@ -671,6 +739,7 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc)
{
struct c4iw_qp *qhp = NULL;
+ struct c4iw_srq *srq = NULL;
struct t4_cqe uninitialized_var(cqe), *rd_cqe;
struct t4_wq *wq;
u32 credit = 0;
@@ -689,8 +758,12 @@ static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc)
else {
spin_lock(&qhp->lock);
wq = &(qhp->wq);
+ srq = qhp->srq;
+ if (srq)
+ spin_lock(&srq->lock);
}
- ret = poll_cq(wq, &(chp->cq), &cqe, &cqe_flushed, &cookie, &credit);
+ ret = poll_cq(wq, &chp->cq, &cqe, &cqe_flushed, &cookie, &credit,
+ srq ? &srq->wq : NULL);
if (ret)
goto out;
@@ -699,6 +772,13 @@ static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc)
wc->vendor_err = CQE_STATUS(&cqe);
wc->wc_flags = 0;
+ /*
+ * Simulate a SRQ_LIMIT_REACHED HW notification if required.
+ */
+ if (srq && !(srq->flags & T4_SRQ_LIMIT_SUPPORT) && srq->armed &&
+ srq->wq.in_use < srq->srq_limit)
+ c4iw_dispatch_srq_limit_reached_event(srq);
+
pr_debug("qpid 0x%x type %d opcode %d status 0x%x len %u wrid hi 0x%x lo 0x%x cookie 0x%llx\n",
CQE_QPID(&cqe),
CQE_TYPE(&cqe), CQE_OPCODE(&cqe),
@@ -810,8 +890,11 @@ static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc)
}
}
out:
- if (wq)
+ if (wq) {
+ if (srq)
+ spin_unlock(&srq->lock);
spin_unlock(&qhp->lock);
+ }
return ret;
}
@@ -868,6 +951,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
struct c4iw_dev *rhp;
struct c4iw_cq *chp;
struct c4iw_create_cq_resp uresp;
+ struct c4iw_create_cq ucmd;
struct c4iw_ucontext *ucontext = NULL;
int ret, wr_len;
size_t memsize, hwentries;
@@ -879,6 +963,33 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
rhp = to_c4iw_dev(ibdev);
+ /* The support for new kernel mode SRQ extends the t4_cqe struct
+ * size to 64 Bytes from existing 32 Bytes. But, this change brings
+ * in the library/kernel ABI and 32/64 Byte CQE compatibility issues.
+ *
+ * To address these issues, the user <-> kernel response message
+ * c4iw_create_cq_resp's 'reserved' field has been renamed to 'flags'.
+ *
+ * Newer version of libcxgb4 can pre-initialize the 'flags' field in
+ * the request struct with the flag C4IW_64B_CQE. And a new iw_cxgb4
+ * can detect the new libcxgb4 by checking for the C4IW_64B_CQE flag
+ * in the structure c4iw_create_cq received from userspace.
+ * New kernel driver can not work with older userspace library,
+ * c4iw_create_cq() will log a warning message to upgrade libcxgb4 and
+ * aborts the cq creation in this case.
+ *
+ * Likewise, new iw_cxgb4 which supports 64B CQE will set the flag
+ * C4IW_64B_CQE in c4iw_create_cq_resp struct. So, if the response
+ * from the create_cq verb results in the flags field still being zero,
+ * libcxgb4 can destroy the cq and print a warning and fail the user
+ * create cq verb.
+ */
+
+ if (ib_context && udata->inlen < sizeof(ucmd)) {
+ pr_err_once("WARNING: Downlevel libcxgb4. RDMA cannot be supported with this driver/lib combination. Please update libcxgb4.\n");
+ return ERR_PTR(-EINVAL);
+ }
+
if (vector >= rhp->rdev.lldi.nciq)
return ERR_PTR(-EINVAL);
@@ -971,9 +1082,12 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
ucontext->key += PAGE_SIZE;
uresp.gts_key = ucontext->key;
ucontext->key += PAGE_SIZE;
+ /* communicate to the userspace that
+ * kernel driver supports 64B CQE
+ */
+ uresp.flags |= C4IW_64B_CQE;
spin_unlock(&ucontext->mmap_lock);
- ret = ib_copy_to_udata(udata, &uresp,
- sizeof(uresp) - sizeof(uresp.reserved));
+ ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
if (ret)
goto err_free_mm2;
@@ -1030,3 +1144,19 @@ int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
spin_unlock_irqrestore(&chp->lock, flag);
return ret;
}
+
+void c4iw_flush_srqidx(struct c4iw_qp *qhp, u32 srqidx)
+{
+ struct c4iw_cq *rchp = to_c4iw_cq(qhp->ibqp.recv_cq);
+ unsigned long flag;
+
+ /* locking heirarchy: cq lock first, then qp lock. */
+ spin_lock_irqsave(&rchp->lock, flag);
+ spin_lock(&qhp->lock);
+
+ /* create a SRQ RECV CQE for srqidx */
+ insert_recv_cqe(&qhp->wq, &rchp->cq, srqidx);
+
+ spin_unlock(&qhp->lock);
+ spin_unlock_irqrestore(&rchp->lock, flag);
+}
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index feeb8ee6f4a2..50c60c37ae2a 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -275,10 +275,11 @@ static int dump_qp(int id, void *p, void *data)
set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin);
cc = snprintf(qpd->buf + qpd->pos, space,
- "rc qp sq id %u rq id %u state %u "
+ "rc qp sq id %u %s id %u state %u "
"onchip %u ep tid %u state %u "
"%pI4:%u/%u->%pI4:%u/%u\n",
- qp->wq.sq.qid, qp->wq.rq.qid,
+ qp->wq.sq.qid, qp->srq ? "srq" : "rq",
+ qp->srq ? qp->srq->idx : qp->wq.rq.qid,
(int)qp->attr.state,
qp->wq.sq.flags & T4_SQ_ONCHIP,
ep->hwtid, (int)ep->com.state,
@@ -480,6 +481,9 @@ static int stats_show(struct seq_file *seq, void *v)
seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
+ seq_printf(seq, " SRQS: %10llu %10llu %10llu %10llu\n",
+ dev->rdev.stats.srqt.total, dev->rdev.stats.srqt.cur,
+ dev->rdev.stats.srqt.max, dev->rdev.stats.srqt.fail);
seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
@@ -530,6 +534,8 @@ static ssize_t stats_clear(struct file *file, const char __user *buf,
dev->rdev.stats.pbl.fail = 0;
dev->rdev.stats.rqt.max = 0;
dev->rdev.stats.rqt.fail = 0;
+ dev->rdev.stats.rqt.max = 0;
+ dev->rdev.stats.rqt.fail = 0;
dev->rdev.stats.ocqp.max = 0;
dev->rdev.stats.ocqp.fail = 0;
dev->rdev.stats.db_full = 0;
@@ -802,7 +808,7 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
rdev->qpmask = rdev->lldi.udb_density - 1;
rdev->cqmask = rdev->lldi.ucq_density - 1;
- pr_debug("dev %s stag start 0x%0x size 0x%0x num stags %d pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x qp qid start %u size %u cq qid start %u size %u\n",
+ pr_debug("dev %s stag start 0x%0x size 0x%0x num stags %d pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x qp qid start %u size %u cq qid start %u size %u srq size %u\n",
pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
rdev->lldi.vr->pbl.start,
@@ -811,7 +817,8 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
rdev->lldi.vr->qp.start,
rdev->lldi.vr->qp.size,
rdev->lldi.vr->cq.start,
- rdev->lldi.vr->cq.size);
+ rdev->lldi.vr->cq.size,
+ rdev->lldi.vr->srq.size);
pr_debug("udb %pR db_reg %p gts_reg %p qpmask 0x%x cqmask 0x%x\n",
&rdev->lldi.pdev->resource[2],
rdev->lldi.db_reg, rdev->lldi.gts_reg,
@@ -824,10 +831,12 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
rdev->stats.stag.total = rdev->lldi.vr->stag.size;
rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
+ rdev->stats.srqt.total = rdev->lldi.vr->srq.size;
rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
rdev->stats.qid.total = rdev->lldi.vr->qp.size;
- err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
+ err = c4iw_init_resource(rdev, c4iw_num_stags(rdev),
+ T4_MAX_NUM_PD, rdev->lldi.vr->srq.size);
if (err) {
pr_err("error %d initializing resources\n", err);
return err;
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index d5c1406aa672..c2cf0d1d968a 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -1007,7 +1007,8 @@ void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qpid,
struct c4iw_dev_ucontext *uctx);
u32 c4iw_get_resource(struct c4iw_id_table *id_table);
void c4iw_put_resource(struct c4iw_id_table *id_table, u32 entry);
-int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt, u32 nr_pdid);
+int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt,
+ u32 nr_pdid, u32 nr_srqt);
int c4iw_init_ctrl_qp(struct c4iw_rdev *rdev);
int c4iw_pblpool_create(struct c4iw_rdev *rdev);
int c4iw_rqtpool_create(struct c4iw_rdev *rdev);
diff --git a/drivers/infiniband/hw/cxgb4/provider.c b/drivers/infiniband/hw/cxgb4/provider.c
index 0b9cc73c3ded..e68c0a3076cd 100644
--- a/drivers/infiniband/hw/cxgb4/provider.c
+++ b/drivers/infiniband/hw/cxgb4/provider.c
@@ -343,6 +343,7 @@ static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *pro
props->max_mr_size = T4_MAX_MR_SIZE;
props->max_qp = dev->rdev.lldi.vr->qp.size / 2;
props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
+ props->max_srq_wr = dev->rdev.hw_queue.t4_max_qp_depth;
props->max_sge = T4_MAX_RECV_SGE;
props->max_sge_rd = 1;
props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
@@ -585,7 +586,10 @@ void c4iw_register_device(struct work_struct *work)
(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_POST_SEND) |
- (1ull << IB_USER_VERBS_CMD_POST_RECV);
+ (1ull << IB_USER_VERBS_CMD_POST_RECV) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
dev->ibdev.node_type = RDMA_NODE_RNIC;
BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
@@ -607,6 +611,9 @@ void c4iw_register_device(struct work_struct *work)
dev->ibdev.modify_qp = c4iw_ib_modify_qp;
dev->ibdev.query_qp = c4iw_ib_query_qp;
dev->ibdev.destroy_qp = c4iw_destroy_qp;
+ dev->ibdev.create_srq = c4iw_create_srq;
+ dev->ibdev.modify_srq = c4iw_modify_srq;
+ dev->ibdev.destroy_srq = c4iw_destroy_srq;
dev->ibdev.create_cq = c4iw_create_cq;
dev->ibdev.destroy_cq = c4iw_destroy_cq;
dev->ibdev.resize_cq = c4iw_resize_cq;
@@ -624,6 +631,7 @@ void c4iw_register_device(struct work_struct *work)
dev->ibdev.req_notify_cq = c4iw_arm_cq;
dev->ibdev.post_send = c4iw_post_send;
dev->ibdev.post_recv = c4iw_post_receive;
+ dev->ibdev.post_srq_recv = c4iw_post_srq_recv;
dev->ibdev.alloc_hw_stats = c4iw_alloc_stats;
dev->ibdev.get_hw_stats = c4iw_get_mib;
dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index de77b6027d69..42defb81b23d 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -147,21 +147,24 @@ static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user)
}
static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
- struct c4iw_dev_ucontext *uctx)
+ 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.
*/
- 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);
+
+ 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;
}
@@ -195,7 +198,8 @@ void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid,
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)
+ struct c4iw_wr_wait *wr_waitp,
+ int need_rq)
{
int user = (uctx != &rdev->uctx);
struct fw_ri_res_wr *res_wr;
@@ -209,36 +213,45 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
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 (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 = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
- GFP_KERNEL);
+ 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;
}
- 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;
+ 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;
+ }
}
}
- /*
- * 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;
+ 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);
@@ -247,34 +260,39 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
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;
+ 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));
+ memset(wq->rq.queue, 0, wq->rq.memsize);
+ dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
}
- 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));
- 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->sq.bar2_va = c4iw_bar2_addrs(rdev, wq->sq.qid, T4_BAR2_QTYPE_EGRESS,
&wq->sq.bar2_qid,
user ? &wq->sq.bar2_pa : NULL);
- wq->rq.bar2_va = c4iw_bar2_addrs(rdev, wq->rq.qid, T4_BAR2_QTYPE_EGRESS,
- &wq->rq.bar2_qid,
- user ? &wq->rq.bar2_pa : NULL);
+ if (need_rq)
+ wq->rq.bar2_va = c4iw_bar2_addrs(rdev, wq->rq.qid,
+ T4_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 || !wq->rq.bar2_pa)) {
+ 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);
goto free_dma;
@@ -285,7 +303,8 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
/* 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;
@@ -296,7 +315,7 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
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(2) |
+ 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;
@@ -327,30 +346,36 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
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(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);
+ 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__);
@@ -363,19 +388,23 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
return 0;
free_dma:
- dma_free_coherent(&(rdev->lldi.pdev->dev),
- wq->rq.memsize, wq->rq.queue,
- dma_unmap_addr(&wq->rq, mapping));
+ 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:
- c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
+ if (need_rq)
+ c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
free_sw_rq:
- kfree(wq->rq.sw_rq);
+ if (need_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);
+ if (need_rq)
+ c4iw_put_qpid(rdev, wq->rq.qid, uctx);
free_sq_qid:
c4iw_put_qpid(rdev, wq->sq.qid, uctx);
return ret;
@@ -605,6 +634,20 @@ static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
return 0;
}
+static int build_srq_recv(union t4_recv_wr *wqe, 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,
struct ib_reg_wr *wr, struct c4iw_mr *mhp,
u8 *len16)
@@ -721,7 +764,7 @@ static void free_qp_work(struct work_struct *work)
pr_debug("qhp %p ucontext %p\n", qhp, ucontext);
destroy_qp(&rhp->rdev, &qhp->wq,
- ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
+ ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !qhp->srq);
if (ucontext)
c4iw_put_ucontext(ucontext);
@@ -1145,6 +1188,89 @@ int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
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, struct ib_recv_wr *wr,
+ 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)
{
@@ -1322,7 +1448,7 @@ static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
struct c4iw_cq *schp)
{
int count;
- int rq_flushed, sq_flushed;
+ int rq_flushed = 0, sq_flushed;
unsigned long flag;
pr_debug("qhp %p rchp %p schp %p\n", qhp, rchp, schp);
@@ -1341,12 +1467,13 @@ static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
return;
}
qhp->wq.flushed = 1;
- t4_set_wq_in_error(&qhp->wq);
+ t4_set_wq_in_error(&qhp->wq, 0);
c4iw_flush_hw_cq(rchp);
- c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
- rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
-
+ 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);
sq_flushed = c4iw_flush_sq(qhp);
@@ -1389,7 +1516,7 @@ static void flush_qp(struct c4iw_qp *qhp)
schp = to_c4iw_cq(qhp->ibqp.send_cq);
if (qhp->ibqp.uobject) {
- t4_set_wq_in_error(&qhp->wq);
+ 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);
@@ -1520,16 +1647,21 @@ static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
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);
+ 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);
- 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);
@@ -1646,7 +1778,7 @@ int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
case C4IW_QP_STATE_RTS:
switch (attrs->next_state) {
case C4IW_QP_STATE_CLOSING:
- t4_set_wq_in_error(&qhp->wq);
+ t4_set_wq_in_error(&qhp->wq, 0);
set_state(qhp, C4IW_QP_STATE_CLOSING);
ep = qhp->ep;
if (!internal) {
@@ -1659,7 +1791,7 @@ int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
goto err;
break;
case C4IW_QP_STATE_TERMINATE:
- t4_set_wq_in_error(&qhp->wq);
+ 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;
@@ -1676,7 +1808,7 @@ int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
}
break;
case C4IW_QP_STATE_ERROR:
- t4_set_wq_in_error(&qhp->wq);
+ t4_set_wq_in_error(&qhp->wq, 0);
set_state(qhp, C4IW_QP_STATE_ERROR);
if (!internal) {
abort = 1;
@@ -1822,7 +1954,7 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
struct c4iw_cq *schp;
struct c4iw_cq *rchp;
struct c4iw_create_qp_resp uresp;
- unsigned int sqsize, rqsize;
+ unsigned int sqsize, rqsize = 0;
struct c4iw_ucontext *ucontext;
int ret;
struct c4iw_mm_entry *sq_key_mm, *rq_key_mm = NULL, *sq_db_key_mm;
@@ -1843,11 +1975,13 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
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->srq) {
+ 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);
@@ -1872,19 +2006,23 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
(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 (!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);
- qhp->wq.rq.memsize = roundup(qhp->wq.rq.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);
+ qhp->wr_waitp, !attrs->srq);
if (ret)
goto err_free_wr_wait;
@@ -1897,10 +2035,12 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
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;
+ 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;
@@ -1925,20 +2065,25 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
ret = -ENOMEM;
goto err_remove_handle;
}
- rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL);
- if (!rq_key_mm) {
- ret = -ENOMEM;
- goto err_free_sq_key;
+ 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;
}
- 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;
+ 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;
+ }
}
if (t4_sq_onchip(&qhp->wq.sq)) {
ma_sync_key_mm = kmalloc(sizeof(*ma_sync_key_mm),
@@ -1954,9 +2099,11 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
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;
+ 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;
@@ -1966,12 +2113,16 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
}
uresp.sq_key = ucontext->key;
ucontext->key += PAGE_SIZE;
- uresp.rq_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;
- uresp.rq_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)
@@ -1980,18 +2131,23 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
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);
- 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);
+ 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);
- 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 (!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 =
@@ -2004,7 +2160,19 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
c4iw_get_ucontext(ucontext);
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,
@@ -2014,18 +2182,20 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
err_free_ma_sync_key:
kfree(ma_sync_key_mm);
err_free_rq_db_key:
- kfree(rq_db_key_mm);
+ if (!attrs->srq)
+ kfree(rq_db_key_mm);
err_free_sq_db_key:
kfree(sq_db_key_mm);
err_free_rq_key:
- kfree(rq_key_mm);
+ if (!attrs->srq)
+ kfree(rq_key_mm);
err_free_sq_key:
kfree(sq_key_mm);
err_remove_handle:
remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
err_destroy_qp:
destroy_qp(&rhp->rdev, &qhp->wq,
- ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
+ ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !attrs->srq);
err_free_wr_wait:
c4iw_put_wr_wait(qhp->wr_waitp);
err_free_qhp:
@@ -2091,6 +2261,45 @@ struct ib_qp *c4iw_get_qp(struct ib_device *dev, int 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 = {0};
+
+ 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)
{
@@ -2107,3 +2316,358 @@ int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
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,
+ pci_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;
+
+ memset(wq->queue, 0, wq->memsize);
+ pci_unmap_addr_set(wq, mapping, wq->dma_addr);
+
+ wq->bar2_va = c4iw_bar2_addrs(rdev, wq->qid, T4_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 | __GFP_NOFAIL);
+ 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,
+ pci_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--;
+ }
+}
+
+struct ib_srq *c4iw_create_srq(struct ib_pd *pd, struct ib_srq_init_attr *attrs,
+ struct ib_udata *udata)
+{
+ struct c4iw_dev *rhp;
+ struct c4iw_srq *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;
+
+ 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 ERR_PTR(-EINVAL);
+ if (attrs->attr.max_wr > rhp->rdev.hw_queue.t4_max_rq_size)
+ return ERR_PTR(-E2BIG);
+ if (attrs->attr.max_sge > T4_MAX_RECV_SGE)
+ return ERR_PTR(-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 = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
+
+ srq = kzalloc(sizeof(*srq), GFP_KERNEL);
+ if (!srq)
+ return ERR_PTR(-ENOMEM);
+
+ srq->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL);
+ if (!srq->wr_waitp) {
+ ret = -ENOMEM;
+ goto err_free_srq;
+ }
+
+ 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;
+
+ ret = insert_handle(rhp, &rhp->qpidr, srq, srq->wq.qid);
+ if (ret)
+ goto err_free_queue;
+
+ if (udata) {
+ srq_key_mm = kmalloc(sizeof(*srq_key_mm), GFP_KERNEL);
+ if (!srq_key_mm) {
+ ret = -ENOMEM;
+ goto err_remove_handle;
+ }
+ 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;
+ }
+ 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 &srq->ibsrq;
+err_free_srq_db_key_mm:
+ kfree(srq_db_key_mm);
+err_free_srq_key_mm:
+ kfree(srq_key_mm);
+err_remove_handle:
+ remove_handle(rhp, &rhp->qpidr, srq->wq.qid);
+err_free_queue:
+ free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx,
+ srq->wr_waitp);
+err_free_skb:
+ if (srq->destroy_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);
+err_free_srq:
+ kfree(srq);
+ return ERR_PTR(ret);
+}
+
+int c4iw_destroy_srq(struct ib_srq *ibsrq)
+{
+ 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);
+
+ remove_handle(rhp, &rhp->qpidr, srq->wq.qid);
+ ucontext = ibsrq->uobject ?
+ to_c4iw_ucontext(ibsrq->uobject->context) : NULL;
+ 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);
+ kfree(srq);
+ return 0;
+}
diff --git a/drivers/infiniband/hw/cxgb4/resource.c b/drivers/infiniband/hw/cxgb4/resource.c
index 3cf25997ed2b..c2f45e5e60d9 100644
--- a/drivers/infiniband/hw/cxgb4/resource.c
+++ b/drivers/infiniband/hw/cxgb4/resource.c
@@ -53,7 +53,8 @@ static int c4iw_init_qid_table(struct c4iw_rdev *rdev)
}
/* nr_* must be power of 2 */
-int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt, u32 nr_pdid)
+int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt,
+ u32 nr_pdid, u32 nr_srqt)
{
int err = 0;
err = c4iw_id_table_alloc(&rdev->resource.tpt_table, 0, nr_tpt, 1,
@@ -67,7 +68,17 @@ int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt, u32 nr_pdid)
nr_pdid, 1, 0);
if (err)
goto pdid_err;
+ if (!nr_srqt)
+ err = c4iw_id_table_alloc(&rdev->resource.srq_table, 0,
+ 1, 1, 0);
+ else
+ err = c4iw_id_table_alloc(&rdev->resource.srq_table, 0,
+ nr_srqt, 0, 0);
+ if (err)
+ goto srq_err;
return 0;
+ srq_err:
+ c4iw_id_table_free(&rdev->resource.pdid_table);
pdid_err:
c4iw_id_table_free(&rdev->resource.qid_table);
qid_err:
@@ -349,13 +360,21 @@ void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
int c4iw_rqtpool_create(struct c4iw_rdev *rdev)
{
unsigned rqt_start, rqt_chunk, rqt_top;
+ int skip = 0;
rdev->rqt_pool = gen_pool_create(MIN_RQT_SHIFT, -1);
if (!rdev->rqt_pool)
return -ENOMEM;
- rqt_start = rdev->lldi.vr->rq.start;
- rqt_chunk = rdev->lldi.vr->rq.size;
+ /*
+ * If SRQs are supported, then never use the first RQE from
+ * the RQT region. This is because HW uses RQT index 0 as NULL.
+ */
+ if (rdev->lldi.vr->srq.size)
+ skip = T4_RQT_ENTRY_SIZE;
+
+ rqt_start = rdev->lldi.vr->rq.start + skip;
+ rqt_chunk = rdev->lldi.vr->rq.size - skip;
rqt_top = rqt_start + rqt_chunk;
while (rqt_start < rqt_top) {
@@ -383,6 +402,32 @@ void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev)
gen_pool_destroy(rdev->rqt_pool);
}
+int c4iw_alloc_srq_idx(struct c4iw_rdev *rdev)
+{
+ int idx;
+
+ idx = c4iw_id_alloc(&rdev->resource.srq_table);
+ mutex_lock(&rdev->stats.lock);
+ if (idx == -1) {
+ rdev->stats.srqt.fail++;
+ mutex_unlock(&rdev->stats.lock);
+ return -ENOMEM;
+ }
+ rdev->stats.srqt.cur++;
+ if (rdev->stats.srqt.cur > rdev->stats.srqt.max)
+ rdev->stats.srqt.max = rdev->stats.srqt.cur;
+ mutex_unlock(&rdev->stats.lock);
+ return idx;
+}
+
+void c4iw_free_srq_idx(struct c4iw_rdev *rdev, int idx)
+{
+ c4iw_id_free(&rdev->resource.srq_table, idx);
+ mutex_lock(&rdev->stats.lock);
+ rdev->stats.srqt.cur--;
+ mutex_unlock(&rdev->stats.lock);
+}
+
/*
* On-Chip QP Memory.
*/
diff --git a/drivers/infiniband/hw/cxgb4/t4.h b/drivers/infiniband/hw/cxgb4/t4.h
index 0aa8044058d5..e62fb7d164ee 100644
--- a/drivers/infiniband/hw/cxgb4/t4.h
+++ b/drivers/infiniband/hw/cxgb4/t4.h
@@ -183,9 +183,15 @@ struct t4_cqe {
__be32 wrid_hi;
__be32 wrid_low;
} gen;
+ struct {
+ __be32 stag;
+ __be32 msn;
+ __be32 reserved;
+ __be32 abs_rqe_idx;
+ } srcqe;
u64 drain_cookie;
} u;
- __be64 reserved;
+ __be64 reserved[4];
__be64 bits_type_ts;
};
@@ -480,7 +486,6 @@ static inline void t4_rq_produce(struct t4_wq *wq, u8 len16)
static inline void t4_rq_consume(struct t4_wq *wq)
{
wq->rq.in_use--;
- wq->rq.msn++;
if (++wq->rq.cidx == wq->rq.size)
wq->rq.cidx = 0;
}
@@ -633,12 +638,14 @@ static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc,
static inline int t4_wq_in_error(struct t4_wq *wq)
{
- return wq->rq.queue[wq->rq.size].status.qp_err;
+ return *wq->qp_errp;
}
-static inline void t4_set_wq_in_error(struct t4_wq *wq)
+static inline void t4_set_wq_in_error(struct t4_wq *wq, u32 srqidx)
{
- wq->rq.queue[wq->rq.size].status.qp_err = 1;
+ if (srqidx)
+ *wq->srqidxp = srqidx;
+ *wq->qp_errp = 1;
}
static inline void t4_disable_wq_db(struct t4_wq *wq)
diff --git a/include/uapi/rdma/cxgb4-abi.h b/include/uapi/rdma/cxgb4-abi.h
index e144c17def66..7b1aa3f3fae3 100644
--- a/include/uapi/rdma/cxgb4-abi.h
+++ b/include/uapi/rdma/cxgb4-abi.h
@@ -44,6 +44,16 @@
* In particular do not use pointer types -- pass pointers in __aligned_u64
* instead.
*/
+
+enum {
+ C4IW_64B_CQE = (1 << 0)
+};
+
+struct c4iw_create_cq {
+ __u32 flags;
+ __u32 reserved;
+};
+
struct c4iw_create_cq_resp {
__aligned_u64 key;
__aligned_u64 gts_key;
@@ -51,7 +61,7 @@ struct c4iw_create_cq_resp {
__u32 cqid;
__u32 size;
__u32 qid_mask;
- __u32 reserved; /* explicit padding (optional for i386) */
+ __u32 flags;
};
enum {
--
2.13.0
--
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