From: Eddie Wai <eddie.wai@xxxxxxxxxxxx>
This patch implements the following HW workarounds
1. The SQ depth needs to be augmented by 128 + 1 to avoid running
into an Out of order CQE issue
2. Workaround to handle the problem where the HW fast path engine continues
to access DMA memory in retranmission mode even after the WQE has
already been completed. If the HW reports this condition, driver detects
it and posts a Fence WQE. The driver stops reporting the completions
to stack until it receives completion for Fence WQE.
Signed-off-by: Eddie Wai <eddie.wai@xxxxxxxxxxxx>
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
---
v2 -> v3 :
- Fixes the memory leak pointed out by Leon
v1 -> v2 :
- Small Correction in the commit message
- Fixes q_full_delta for SQ by setting it to 128
drivers/infiniband/hw/bnxt_re/ib_verbs.c | 373 ++++++++++++++++++++++++++----
drivers/infiniband/hw/bnxt_re/ib_verbs.h | 15 ++
drivers/infiniband/hw/bnxt_re/qplib_fp.c | 165 +++++++++++--
drivers/infiniband/hw/bnxt_re/qplib_fp.h | 17 +-
drivers/infiniband/hw/bnxt_re/qplib_res.h | 1 -
drivers/infiniband/hw/bnxt_re/qplib_sp.c | 5 +
drivers/infiniband/hw/bnxt_re/qplib_sp.h | 2 +
7 files changed, 508 insertions(+), 70 deletions(-)
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 33af2e3..ae428e6 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -61,6 +61,48 @@
#include "ib_verbs.h"
#include <rdma/bnxt_re-abi.h>
+static int __from_ib_access_flags(int iflags)
+{
+ int qflags = 0;
+
+ if (iflags & IB_ACCESS_LOCAL_WRITE)
+ qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
+ if (iflags & IB_ACCESS_REMOTE_READ)
+ qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
+ if (iflags & IB_ACCESS_REMOTE_WRITE)
+ qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
+ if (iflags & IB_ACCESS_REMOTE_ATOMIC)
+ qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
+ if (iflags & IB_ACCESS_MW_BIND)
+ qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
+ if (iflags & IB_ZERO_BASED)
+ qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
+ if (iflags & IB_ACCESS_ON_DEMAND)
+ qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
+ return qflags;
+};
+
+static enum ib_access_flags __to_ib_access_flags(int qflags)
+{
+ enum ib_access_flags iflags = 0;
+
+ if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
+ iflags |= IB_ACCESS_LOCAL_WRITE;
+ if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
+ iflags |= IB_ACCESS_REMOTE_WRITE;
+ if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
+ iflags |= IB_ACCESS_REMOTE_READ;
+ if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
+ iflags |= IB_ACCESS_REMOTE_ATOMIC;
+ if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
+ iflags |= IB_ACCESS_MW_BIND;
+ if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
+ iflags |= IB_ZERO_BASED;
+ if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
+ iflags |= IB_ACCESS_ON_DEMAND;
+ return iflags;
+};
+
static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
struct bnxt_qplib_sge *sg_list, int num)
{
@@ -410,6 +452,158 @@ enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
return IB_LINK_LAYER_ETHERNET;
}
+#define BNXT_RE_FENCE_PBL_SIZE DIV_ROUND_UP(BNXT_RE_FENCE_BYTES, PAGE_SIZE)
+
+static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
+{
+ struct bnxt_re_fence_data *fence = &pd->fence;
+ struct ib_mr *ib_mr = &fence->mr->ib_mr;
+ struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
+
+ memset(wqe, 0, sizeof(*wqe));
+ wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
+ wqe->wr_id = BNXT_QPLIB_FENCE_WRID;
+ wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
+ wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
+ wqe->bind.zero_based = false;
+ wqe->bind.parent_l_key = ib_mr->lkey;
+ wqe->bind.va = (u64)fence->va;
+ wqe->bind.length = fence->size;
+ wqe->bind.access_cntl = __from_ib_access_flags(IB_ACCESS_REMOTE_READ);
+ wqe->bind.mw_type = SQ_BIND_MW_TYPE_TYPE1;
+
+ /* Save the initial rkey in fence structure for now;
+ * wqe->bind.r_key will be set at (re)bind time.
+ */
+ fence->bind_rkey = ib_inc_rkey(fence->mw->rkey);
+}
+
+static int bnxt_re_bind_fence_mw(struct bnxt_qplib_qp *qplib_qp)
+{
+ struct bnxt_re_qp *qp = container_of(qplib_qp, struct bnxt_re_qp,
+ qplib_qp);
+ struct ib_pd *ib_pd = qp->ib_qp.pd;
+ struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
+ struct bnxt_re_fence_data *fence = &pd->fence;
+ struct bnxt_qplib_swqe *fence_wqe = &fence->bind_wqe;
+ struct bnxt_qplib_swqe wqe;
+ int rc;
+
+ memcpy(&wqe, fence_wqe, sizeof(wqe));
+ wqe.bind.r_key = fence->bind_rkey;
+ fence->bind_rkey = ib_inc_rkey(fence->bind_rkey);
+
+ dev_dbg(rdev_to_dev(qp->rdev),
+ "Posting bind fence-WQE: rkey: %#x QP: %d PD: %p\n",
+ wqe.bind.r_key, qp->qplib_qp.id, pd);
+ rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
+ if (rc) {
+ dev_err(rdev_to_dev(qp->rdev), "Failed to bind fence-WQE\n");
+ return rc;
+ }
+ bnxt_qplib_post_send_db(&qp->qplib_qp);
+
+ return rc;
+}
+
+static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
+{
+ struct bnxt_re_fence_data *fence = &pd->fence;
+ struct bnxt_re_dev *rdev = pd->rdev;
+ struct device *dev = &rdev->en_dev->pdev->dev;
+ struct bnxt_re_mr *mr = fence->mr;
+
+ if (fence->mw) {
+ bnxt_re_dealloc_mw(fence->mw);
+ fence->mw = NULL;
+ }
+ if (mr) {
+ if (mr->ib_mr.rkey)
+ bnxt_qplib_dereg_mrw(&rdev->qplib_res, &mr->qplib_mr,
+ true);
+ if (mr->ib_mr.lkey)
+ bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
+ kfree(mr);
+ fence->mr = NULL;
+ }
+ if (fence->dma_addr) {
+ dma_unmap_single(dev, fence->dma_addr, BNXT_RE_FENCE_BYTES,
+ DMA_BIDIRECTIONAL);
+ fence->dma_addr = 0;
+ }
+}
+
+static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
+{
+ int mr_access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_MW_BIND;
+ struct bnxt_re_fence_data *fence = &pd->fence;
+ struct bnxt_re_dev *rdev = pd->rdev;
+ struct device *dev = &rdev->en_dev->pdev->dev;
+ struct bnxt_re_mr *mr = NULL;
+ dma_addr_t dma_addr = 0;
+ struct ib_mw *mw;
+ u64 pbl_tbl;
+ int rc;
+
+ dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
+ DMA_BIDIRECTIONAL);
+ rc = dma_mapping_error(dev, dma_addr);
+ if (rc) {
+ dev_err(rdev_to_dev(rdev), "Failed to dma-map fence-MR-mem\n");
+ rc = -EIO;
+ fence->dma_addr = 0;
+ goto fail;
+ }
+ fence->dma_addr = dma_addr;
+
+ /* Allocate a MR */
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr) {
+ rc = -ENOMEM;
+ goto fail;
+ }
+ fence->mr = mr;
+ mr->rdev = rdev;
+ mr->qplib_mr.pd = &pd->qplib_pd;
+ mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
+ mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
+ rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
+ if (rc) {
+ dev_err(rdev_to_dev(rdev), "Failed to alloc fence-HW-MR\n");
+ goto fail;
+ }
+
+ /* Register MR */
+ mr->ib_mr.lkey = mr->qplib_mr.lkey;
+ mr->qplib_mr.va = (u64)fence->va;
+ mr->qplib_mr.total_size = BNXT_RE_FENCE_BYTES;
+ pbl_tbl = dma_addr;
+ rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl_tbl,
+ BNXT_RE_FENCE_PBL_SIZE, false);
+ if (rc) {
+ dev_err(rdev_to_dev(rdev), "Failed to register fence-MR\n");
+ goto fail;
+ }
+ mr->ib_mr.rkey = mr->qplib_mr.rkey;
+
+ /* Create a fence MW only for kernel consumers */
+ mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
+ if (!mw) {
+ dev_err(rdev_to_dev(rdev),
+ "Failed to create fence-MW for PD: %p\n", pd);
+ rc = -EINVAL;
+ goto fail;
+ }
+ fence->mw = mw;
+
+ bnxt_re_create_fence_wqe(pd);
+ return 0;
+
+fail:
+ bnxt_re_destroy_fence_mr(pd);
+ return rc;
+}
+
/* Protection Domains */
int bnxt_re_dealloc_pd(struct ib_pd *ib_pd)
{
@@ -417,6 +611,7 @@ int bnxt_re_dealloc_pd(struct ib_pd *ib_pd)
struct bnxt_re_dev *rdev = pd->rdev;
int rc;
+ bnxt_re_destroy_fence_mr(pd);
if (ib_pd->uobject && pd->dpi.dbr) {
struct ib_ucontext *ib_uctx = ib_pd->uobject->context;
struct bnxt_re_ucontext *ucntx;
@@ -498,6 +693,10 @@ struct ib_pd *bnxt_re_alloc_pd(struct ib_device *ibdev,
}
}
+ if (!udata)
+ if (bnxt_re_create_fence_mr(pd))
+ dev_warn(rdev_to_dev(rdev),
+ "Failed to create Fence-MR\n");
return &pd->ib_pd;
dbfail:
(void)bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
@@ -848,12 +1047,16 @@ static struct bnxt_re_qp *bnxt_re_create_shadow_qp
/* Shadow QP SQ depth should be same as QP1 RQ depth */
qp->qplib_qp.sq.max_wqe = qp1_qp->rq.max_wqe;
qp->qplib_qp.sq.max_sge = 2;
+ /* Q full delta can be 1 since it is internal QP */
+ qp->qplib_qp.sq.q_full_delta = 1;
qp->qplib_qp.scq = qp1_qp->scq;
qp->qplib_qp.rcq = qp1_qp->rcq;
qp->qplib_qp.rq.max_wqe = qp1_qp->rq.max_wqe;
qp->qplib_qp.rq.max_sge = qp1_qp->rq.max_sge;
+ /* Q full delta can be 1 since it is internal QP */
+ qp->qplib_qp.rq.q_full_delta = 1;
qp->qplib_qp.mtu = qp1_qp->mtu;
@@ -916,10 +1119,6 @@ struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
qp->qplib_qp.sig_type = ((qp_init_attr->sq_sig_type ==
IB_SIGNAL_ALL_WR) ? true : false);
- entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr + 1);
- qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
- dev_attr->max_qp_wqes + 1);
-
qp->qplib_qp.sq.max_sge = qp_init_attr->cap.max_send_sge;
if (qp->qplib_qp.sq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.sq.max_sge = dev_attr->max_qp_sges;
@@ -958,6 +1157,9 @@ struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
qp->qplib_qp.rq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes + 1);
+ qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
+ qp_init_attr->cap.max_recv_wr;
+
qp->qplib_qp.rq.max_sge = qp_init_attr->cap.max_recv_sge;
if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
@@ -966,6 +1168,12 @@ struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
qp->qplib_qp.mtu = ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
if (qp_init_attr->qp_type == IB_QPT_GSI) {
+ /* Allocate 1 more than what's provided */
+ entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr + 1);
+ qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
+ dev_attr->max_qp_wqes + 1);
+ qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
+ qp_init_attr->cap.max_send_wr;
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
if (qp->qplib_qp.rq.max_sge > dev_attr->max_qp_sges)
qp->qplib_qp.rq.max_sge = dev_attr->max_qp_sges;
@@ -1005,6 +1213,22 @@ struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
}
} else {
+ /* Allocate 128 + 1 more than what's provided */
+ entries = roundup_pow_of_two(qp_init_attr->cap.max_send_wr +
+ BNXT_QPLIB_RESERVED_QP_WRS + 1);
+ qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
+ dev_attr->max_qp_wqes +
+ BNXT_QPLIB_RESERVED_QP_WRS + 1);
+ qp->qplib_qp.sq.q_full_delta = BNXT_QPLIB_RESERVED_QP_WRS + 1;
+
+ /*
+ * Reserving one slot for Phantom WQE. Application can
+ * post one extra entry in this case. But allowing this to avoid
+ * unexpected Queue full condition
+ */
+
+ qp->qplib_qp.sq.q_full_delta -= 1;
+
qp->qplib_qp.max_rd_atomic = dev_attr->max_qp_rd_atom;
qp->qplib_qp.max_dest_rd_atomic = dev_attr->max_qp_init_rd_atom;
if (udata) {
@@ -1128,48 +1352,6 @@ static enum ib_mtu __to_ib_mtu(u32 mtu)
}
}
-static int __from_ib_access_flags(int iflags)
-{
- int qflags = 0;
-
- if (iflags & IB_ACCESS_LOCAL_WRITE)
- qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
- if (iflags & IB_ACCESS_REMOTE_READ)
- qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
- if (iflags & IB_ACCESS_REMOTE_WRITE)
- qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
- if (iflags & IB_ACCESS_REMOTE_ATOMIC)
- qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
- if (iflags & IB_ACCESS_MW_BIND)
- qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
- if (iflags & IB_ZERO_BASED)
- qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
- if (iflags & IB_ACCESS_ON_DEMAND)
- qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
- return qflags;
-};
-
-static enum ib_access_flags __to_ib_access_flags(int qflags)
-{
- enum ib_access_flags iflags = 0;
-
- if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
- iflags |= IB_ACCESS_LOCAL_WRITE;
- if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
- iflags |= IB_ACCESS_REMOTE_WRITE;
- if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
- iflags |= IB_ACCESS_REMOTE_READ;
- if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
- iflags |= IB_ACCESS_REMOTE_ATOMIC;
- if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
- iflags |= IB_ACCESS_MW_BIND;
- if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
- iflags |= IB_ZERO_BASED;
- if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
- iflags |= IB_ACCESS_ON_DEMAND;
- return iflags;
-};
-
static int bnxt_re_modify_shadow_qp(struct bnxt_re_dev *rdev,
struct bnxt_re_qp *qp1_qp,
int qp_attr_mask)
@@ -1376,11 +1558,21 @@ int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
entries = roundup_pow_of_two(qp_attr->cap.max_send_wr);
qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
dev_attr->max_qp_wqes + 1);
+ qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
+ qp_attr->cap.max_send_wr;
+ /*
+ * Reserving one slot for Phantom WQE. Some application can
+ * post one extra entry in this case. Allowing this to avoid
+ * unexpected Queue full condition
+ */
+ qp->qplib_qp.sq.q_full_delta -= 1;
qp->qplib_qp.sq.max_sge = qp_attr->cap.max_send_sge;
if (qp->qplib_qp.rq.max_wqe) {
entries = roundup_pow_of_two(qp_attr->cap.max_recv_wr);
qp->qplib_qp.rq.max_wqe =
min_t(u32, entries, dev_attr->max_qp_wqes + 1);
+ qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
+ qp_attr->cap.max_recv_wr;
qp->qplib_qp.rq.max_sge = qp_attr->cap.max_recv_sge;
} else {
/* SRQ was used prior, just ignore the RQ caps */
@@ -2641,12 +2833,36 @@ static void bnxt_re_process_res_ud_wc(struct ib_wc *wc,
wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
}
+static int send_phantom_wqe(struct bnxt_re_qp *qp)
+{
+ struct bnxt_qplib_qp *lib_qp = &qp->qplib_qp;
+ unsigned long flags;
+ int rc = 0;
+
+ spin_lock_irqsave(&qp->sq_lock, flags);
+
+ rc = bnxt_re_bind_fence_mw(lib_qp);
+ if (!rc) {
+ lib_qp->sq.phantom_wqe_cnt++;
+ dev_dbg(&lib_qp->sq.hwq.pdev->dev,
+ "qp %#x sq->prod %#x sw_prod %#x phantom_wqe_cnt %d\n",
+ lib_qp->id, lib_qp->sq.hwq.prod,
+ HWQ_CMP(lib_qp->sq.hwq.prod, &lib_qp->sq.hwq),
+ lib_qp->sq.phantom_wqe_cnt);
+ }
+
+ spin_unlock_irqrestore(&qp->sq_lock, flags);
+ return rc;
+}
+
int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
{
struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
struct bnxt_re_qp *qp;
struct bnxt_qplib_cqe *cqe;
int i, ncqe, budget;
+ struct bnxt_qplib_q *sq;
+ struct bnxt_qplib_qp *lib_qp;
u32 tbl_idx;
struct bnxt_re_sqp_entries *sqp_entry = NULL;
unsigned long flags;
@@ -2659,7 +2875,21 @@ int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
}
cqe = &cq->cql[0];
while (budget) {
- ncqe = bnxt_qplib_poll_cq(&cq->qplib_cq, cqe, budget);
+ lib_qp = NULL;
+ ncqe = bnxt_qplib_poll_cq(&cq->qplib_cq, cqe, budget, &lib_qp);
+ if (lib_qp) {
+ sq = &lib_qp->sq;
+ if (sq->send_phantom) {
+ qp = container_of(lib_qp,
+ struct bnxt_re_qp, qplib_qp);
+ if (send_phantom_wqe(qp) == -ENOMEM)
+ dev_err(rdev_to_dev(cq->rdev),
+ "Phantom failed! Scheduled to send again\n");
+ else
+ sq->send_phantom = false;
+ }
+ }
+
if (!ncqe)
break;
@@ -2912,6 +3142,55 @@ struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type type,
return ERR_PTR(rc);
}
+struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
+ struct ib_udata *udata)
+{
+ struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
+ struct bnxt_re_dev *rdev = pd->rdev;
+ struct bnxt_re_mw *mw;
+ int rc;
+
+ mw = kzalloc(sizeof(*mw), GFP_KERNEL);
+ if (!mw)
+ return ERR_PTR(-ENOMEM);
+ mw->rdev = rdev;
+ mw->qplib_mw.pd = &pd->qplib_pd;
+
+ mw->qplib_mw.type = (type == IB_MW_TYPE_1 ?
+ CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE1 :
+ CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE2B);
+ rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mw->qplib_mw);
+ if (rc) {
+ dev_err(rdev_to_dev(rdev), "Allocate MW failed!");
+ goto fail;
+ }
+ mw->ib_mw.rkey = mw->qplib_mw.rkey;
+
+ atomic_inc(&rdev->mw_count);
+ return &mw->ib_mw;
+
+fail:
+ kfree(mw);
+ return ERR_PTR(rc);
+}
+
+int bnxt_re_dealloc_mw(struct ib_mw *ib_mw)
+{
+ struct bnxt_re_mw *mw = container_of(ib_mw, struct bnxt_re_mw, ib_mw);
+ struct bnxt_re_dev *rdev = mw->rdev;
+ int rc;
+
+ rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mw->qplib_mw);
+ if (rc) {
+ dev_err(rdev_to_dev(rdev), "Free MW failed: %#x\n", rc);
+ return rc;
+ }
+
+ kfree(mw);
+ atomic_dec(&rdev->mw_count);
+ return rc;
+}
+
/* Fast Memory Regions */
struct ib_fmr *bnxt_re_alloc_fmr(struct ib_pd *ib_pd, int mr_access_flags,
struct ib_fmr_attr *fmr_attr)
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
index b4084c2..7a072ad 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
@@ -44,11 +44,23 @@ struct bnxt_re_gid_ctx {
u32 refcnt;
};
+#define BNXT_RE_FENCE_BYTES 64
+struct bnxt_re_fence_data {
+ u32 size;
+ u8 va[BNXT_RE_FENCE_BYTES];
+ dma_addr_t dma_addr;
+ struct bnxt_re_mr *mr;
+ struct ib_mw *mw;
+ struct bnxt_qplib_swqe bind_wqe;
+ u32 bind_rkey;
+};
+
struct bnxt_re_pd {
struct bnxt_re_dev *rdev;
struct ib_pd ib_pd;
struct bnxt_qplib_pd qplib_pd;
struct bnxt_qplib_dpi dpi;
+ struct bnxt_re_fence_data fence;
};
struct bnxt_re_ah {
@@ -181,6 +193,9 @@ int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type mr_type,
u32 max_num_sg);
int bnxt_re_dereg_mr(struct ib_mr *mr);
+struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
+ struct ib_udata *udata);
+int bnxt_re_dealloc_mw(struct ib_mw *mw);
struct ib_fmr *bnxt_re_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
struct ib_fmr_attr *fmr_attr);
int bnxt_re_map_phys_fmr(struct ib_fmr *fmr, u64 *page_list, int list_len,
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index ea9ce4f..66abec0 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -1083,8 +1083,12 @@ int bnxt_qplib_post_send(struct bnxt_qplib_qp *qp,
rc = -EINVAL;
goto done;
}
- if (HWQ_CMP((sq->hwq.prod + 1), &sq->hwq) ==
- HWQ_CMP(sq->hwq.cons, &sq->hwq)) {
+
+ if (bnxt_qplib_queue_full(sq)) {
+ dev_err(&sq->hwq.pdev->dev,
+ "QPLIB: prod = %#x cons = %#x qdepth = %#x delta = %#x",
+ sq->hwq.prod, sq->hwq.cons, sq->hwq.max_elements,
+ sq->q_full_delta);
rc = -ENOMEM;
goto done;
}
@@ -1332,8 +1336,7 @@ int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp,
rc = -EINVAL;
goto done;
}
- if (HWQ_CMP((rq->hwq.prod + 1), &rq->hwq) ==
- HWQ_CMP(rq->hwq.cons, &rq->hwq)) {
+ if (bnxt_qplib_queue_full(rq)) {
dev_err(&rq->hwq.pdev->dev,
"QPLIB: FP: QP (0x%x) RQ is full!", qp->id);
rc = -EINVAL;
@@ -1551,14 +1554,112 @@ static int __flush_rq(struct bnxt_qplib_q *rq, struct bnxt_qplib_qp *qp,
return rc;
}
+/* Note: SQE is valid from sw_sq_cons up to cqe_sq_cons (exclusive)
+ * CQE is track from sw_cq_cons to max_element but valid only if VALID=1
+ */
+static int do_wa9060(struct bnxt_qplib_qp *qp, struct bnxt_qplib_cq *cq,
+ u32 cq_cons, u32 sw_sq_cons, u32 cqe_sq_cons)
+{
+ struct bnxt_qplib_q *sq = &qp->sq;
+ struct bnxt_qplib_swq *swq;
+ u32 peek_sw_cq_cons, peek_raw_cq_cons, peek_sq_cons_idx;
+ struct cq_base *peek_hwcqe, **peek_hw_cqe_ptr;
+ struct cq_req *peek_req_hwcqe;
+ struct bnxt_qplib_qp *peek_qp;
+ struct bnxt_qplib_q *peek_sq;
+ int i, rc = 0;
+
+ /* Normal mode */
+ /* Check for the psn_search marking before completing */
+ swq = &sq->swq[sw_sq_cons];
+ if (swq->psn_search &&
+ le32_to_cpu(swq->psn_search->flags_next_psn) & 0x80000000) {
+ /* Unmark */
+ swq->psn_search->flags_next_psn = cpu_to_le32
+ (le32_to_cpu(swq->psn_search->flags_next_psn)
+ & ~0x80000000);
+ dev_dbg(&cq->hwq.pdev->dev,
+ "FP: Process Req cq_cons=0x%x qp=0x%x sq cons sw=0x%x cqe=0x%x marked!\n",
+ cq_cons, qp->id, sw_sq_cons, cqe_sq_cons);
+ sq->condition = true;
+ sq->send_phantom = true;
+
+ /* TODO: Only ARM if the previous SQE is ARMALL */
+ bnxt_qplib_arm_cq(cq, DBR_DBR_TYPE_CQ_ARMALL);
+
+ rc = -EAGAIN;
+ goto out;
+ }
+ if (sq->condition) {
+ /* Peek at the completions */
+ peek_raw_cq_cons = cq->hwq.cons;
+ peek_sw_cq_cons = cq_cons;
+ i = cq->hwq.max_elements;
+ while (i--) {
+ peek_sw_cq_cons = HWQ_CMP((peek_sw_cq_cons), &cq->hwq);
+ peek_hw_cqe_ptr = (struct cq_base **)cq->hwq.pbl_ptr;
+ peek_hwcqe = &peek_hw_cqe_ptr[CQE_PG(peek_sw_cq_cons)]
+ [CQE_IDX(peek_sw_cq_cons)];
+ /* If the next hwcqe is VALID */
+ if (CQE_CMP_VALID(peek_hwcqe, peek_raw_cq_cons,
+ cq->hwq.max_elements)) {
+ /* If the next hwcqe is a REQ */
+ if ((peek_hwcqe->cqe_type_toggle &
+ CQ_BASE_CQE_TYPE_MASK) ==
+ CQ_BASE_CQE_TYPE_REQ) {
+ peek_req_hwcqe = (struct cq_req *)
+ peek_hwcqe;
+ peek_qp = (struct bnxt_qplib_qp *)
+ le64_to_cpu(
+ peek_req_hwcqe->qp_handle);
+ peek_sq = &peek_qp->sq;
+ peek_sq_cons_idx = HWQ_CMP(le16_to_cpu(
+ peek_req_hwcqe->sq_cons_idx) - 1
+ , &sq->hwq);
+ /* If the hwcqe's sq's wr_id matches */
+ if (peek_sq == sq &&
+ sq->swq[peek_sq_cons_idx].wr_id ==
+ BNXT_QPLIB_FENCE_WRID) {
+ /*
+ * Unbreak only if the phantom
+ * comes back
+ */
+ dev_dbg(&cq->hwq.pdev->dev,
+ "FP:Got Phantom CQE");
+ sq->condition = false;
+ sq->single = true;
+ rc = 0;
+ goto out;
+ }
+ }
+ /* Valid but not the phantom, so keep looping */
+ } else {
+ /* Not valid yet, just exit and wait */
+ rc = -EINVAL;
+ goto out;
+ }
+ peek_sw_cq_cons++;
+ peek_raw_cq_cons++;
+ }
+ dev_err(&cq->hwq.pdev->dev,
+ "Should not have come here! cq_cons=0x%x qp=0x%x sq cons sw=0x%x hw=0x%x",
+ cq_cons, qp->id, sw_sq_cons, cqe_sq_cons);
+ rc = -EINVAL;
+ }
+out:
+ return rc;
+}
+
static int bnxt_qplib_cq_process_req(struct bnxt_qplib_cq *cq,
struct cq_req *hwcqe,
- struct bnxt_qplib_cqe **pcqe, int *budget)
+ struct bnxt_qplib_cqe **pcqe, int *budget,
+ u32 cq_cons, struct bnxt_qplib_qp **lib_qp)
{
struct bnxt_qplib_qp *qp;
struct bnxt_qplib_q *sq;
struct bnxt_qplib_cqe *cqe;
- u32 sw_cons, cqe_cons;
+ u32 sw_sq_cons, cqe_sq_cons;
+ struct bnxt_qplib_swq *swq;
int rc = 0;
qp = (struct bnxt_qplib_qp *)((unsigned long)
@@ -1570,13 +1671,13 @@ static int bnxt_qplib_cq_process_req(struct bnxt_qplib_cq *cq,
}
sq = &qp->sq;
- cqe_cons = HWQ_CMP(le16_to_cpu(hwcqe->sq_cons_idx), &sq->hwq);
- if (cqe_cons > sq->hwq.max_elements) {
+ cqe_sq_cons = HWQ_CMP(le16_to_cpu(hwcqe->sq_cons_idx), &sq->hwq);
+ if (cqe_sq_cons > sq->hwq.max_elements) {
dev_err(&cq->hwq.pdev->dev,
"QPLIB: FP: CQ Process req reported ");
dev_err(&cq->hwq.pdev->dev,
"QPLIB: sq_cons_idx 0x%x which exceeded max 0x%x",
- cqe_cons, sq->hwq.max_elements);
+ cqe_sq_cons, sq->hwq.max_elements);
return -EINVAL;
}
/* If we were in the middle of flushing the SQ, continue */
@@ -1585,53 +1686,74 @@ static int bnxt_qplib_cq_process_req(struct bnxt_qplib_cq *cq,
/* Require to walk the sq's swq to fabricate CQEs for all previously
* signaled SWQEs due to CQE aggregation from the current sq cons
- * to the cqe_cons
+ * to the cqe_sq_cons
*/
cqe = *pcqe;
while (*budget) {
- sw_cons = HWQ_CMP(sq->hwq.cons, &sq->hwq);
- if (sw_cons == cqe_cons)
+ sw_sq_cons = HWQ_CMP(sq->hwq.cons, &sq->hwq);
+ if (sw_sq_cons == cqe_sq_cons)
+ /* Done */
break;
+
+ swq = &sq->swq[sw_sq_cons];
memset(cqe, 0, sizeof(*cqe));
cqe->opcode = CQ_BASE_CQE_TYPE_REQ;
cqe->qp_handle = (u64)(unsigned long)qp;
cqe->src_qp = qp->id;
- cqe->wr_id = sq->swq[sw_cons].wr_id;
- cqe->type = sq->swq[sw_cons].type;
+ cqe->wr_id = swq->wr_id;
+ if (cqe->wr_id == BNXT_QPLIB_FENCE_WRID)
+ goto skip;
+ cqe->type = swq->type;
/* For the last CQE, check for status. For errors, regardless
* of the request being signaled or not, it must complete with
* the hwcqe error status
*/
- if (HWQ_CMP((sw_cons + 1), &sq->hwq) == cqe_cons &&
+ if (HWQ_CMP((sw_sq_cons + 1), &sq->hwq) == cqe_sq_cons &&
hwcqe->status != CQ_REQ_STATUS_OK) {
cqe->status = hwcqe->status;
dev_err(&cq->hwq.pdev->dev,
"QPLIB: FP: CQ Processed Req ");
dev_err(&cq->hwq.pdev->dev,
"QPLIB: wr_id[%d] = 0x%llx with status 0x%x",
- sw_cons, cqe->wr_id, cqe->status);
+ sw_sq_cons, cqe->wr_id, cqe->status);
cqe++;
(*budget)--;
sq->flush_in_progress = true;
/* Must block new posting of SQ and RQ */
qp->state = CMDQ_MODIFY_QP_NEW_STATE_ERR;
+ sq->condition = false;
+ sq->single = false;
} else {
- if (sq->swq[sw_cons].flags &
- SQ_SEND_FLAGS_SIGNAL_COMP) {
+ if (swq->flags & SQ_SEND_FLAGS_SIGNAL_COMP) {
+ /* Before we complete, do WA 9060 */
+ if (do_wa9060(qp, cq, cq_cons, sw_sq_cons,
+ cqe_sq_cons)) {
+ *lib_qp = qp;
+ goto out;
+ }
cqe->status = CQ_REQ_STATUS_OK;
cqe++;
(*budget)--;
}
}
+skip:
sq->hwq.cons++;
+ if (sq->single)
+ break;
}
+out:
*pcqe = cqe;
- if (!*budget && HWQ_CMP(sq->hwq.cons, &sq->hwq) != cqe_cons) {
+ if (HWQ_CMP(sq->hwq.cons, &sq->hwq) != cqe_sq_cons) {
/* Out of budget */
rc = -EAGAIN;
goto done;
}
+ /*
+ * Back to normal completion mode only after it has completed all of
+ * the WC for this CQE
+ */
+ sq->single = false;
if (!sq->flush_in_progress)
goto done;
flush:
@@ -1961,7 +2083,7 @@ static int bnxt_qplib_cq_process_cutoff(struct bnxt_qplib_cq *cq,
}
int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,
- int num_cqes)
+ int num_cqes, struct bnxt_qplib_qp **lib_qp)
{
struct cq_base *hw_cqe, **hw_cqe_ptr;
unsigned long flags;
@@ -1986,7 +2108,8 @@ int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,
case CQ_BASE_CQE_TYPE_REQ:
rc = bnxt_qplib_cq_process_req(cq,
(struct cq_req *)hw_cqe,
- &cqe, &budget);
+ &cqe, &budget,
+ sw_cons, lib_qp);
break;
case CQ_BASE_CQE_TYPE_RES_RC:
rc = bnxt_qplib_cq_process_res_rc(cq,
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
index f0150f8..71539ea 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
@@ -88,6 +88,7 @@ struct bnxt_qplib_swq {
struct bnxt_qplib_swqe {
/* General */
+#define BNXT_QPLIB_FENCE_WRID 0x46454E43 /* "FENC" */
u64 wr_id;
u8 reqs_type;
u8 type;
@@ -216,9 +217,16 @@ struct bnxt_qplib_q {
struct scatterlist *sglist;
u32 nmap;
u32 max_wqe;
+ u16 q_full_delta;
u16 max_sge;
u32 psn;
bool flush_in_progress;
+ bool condition;
+ bool single;
+ bool send_phantom;
+ u32 phantom_wqe_cnt;
+ u32 phantom_cqe_cnt;
+ u32 next_cq_cons;
};
struct bnxt_qplib_qp {
@@ -301,6 +309,13 @@ struct bnxt_qplib_qp {
(!!((hdr)->cqe_type_toggle & CQ_BASE_TOGGLE) == \
!((raw_cons) & (cp_bit)))
+static inline bool bnxt_qplib_queue_full(struct bnxt_qplib_q *qplib_q)
+{
+ return HWQ_CMP((qplib_q->hwq.prod + qplib_q->q_full_delta),
+ &qplib_q->hwq) == HWQ_CMP(qplib_q->hwq.cons,
+ &qplib_q->hwq);
+}
+
struct bnxt_qplib_cqe {
u8 status;
u8 type;
@@ -432,7 +447,7 @@ int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp,
int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq);
int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq);
int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,
- int num);
+ int num, struct bnxt_qplib_qp **qp);
void bnxt_qplib_req_notify_cq(struct bnxt_qplib_cq *cq, u32 arm_type);
void bnxt_qplib_free_nq(struct bnxt_qplib_nq *nq);
int bnxt_qplib_alloc_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq);
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.h b/drivers/infiniband/hw/bnxt_re/qplib_res.h
index 4103e60..2e48555 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.h
@@ -52,7 +52,6 @@ extern const struct bnxt_qplib_gid bnxt_qplib_gid_zero;
((HWQ_CMP(hwq->prod, hwq)\
- HWQ_CMP(hwq->cons, hwq))\
& (hwq->max_elements - 1)))
-
enum bnxt_qplib_hwq_type {
HWQ_TYPE_CTX,
HWQ_TYPE_QUEUE,
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index cf7c9cb..fde18cf 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -88,6 +88,11 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
sb->max_qp_init_rd_atom > BNXT_QPLIB_MAX_OUT_RD_ATOM ?
BNXT_QPLIB_MAX_OUT_RD_ATOM : sb->max_qp_init_rd_atom;
attr->max_qp_wqes = le16_to_cpu(sb->max_qp_wr);
+ /*
+ * 128 WQEs needs to be reserved for the HW (8916). Prevent
+ * reporting the max number
+ */
+ attr->max_qp_wqes -= BNXT_QPLIB_RESERVED_QP_WRS;
attr->max_qp_sges = sb->max_sge;
attr->max_cq = le32_to_cpu(sb->max_cq);
attr->max_cq_wqes = le32_to_cpu(sb->max_cqe);
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
index 1442a61..a543f95 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
@@ -40,6 +40,8 @@
#ifndef __BNXT_QPLIB_SP_H__
#define __BNXT_QPLIB_SP_H__
+#define BNXT_QPLIB_RESERVED_QP_WRS 128
+
struct bnxt_qplib_dev_attr {
char fw_ver[32];
u16 max_sgid;
--
2.5.5
--
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