From: Xi Wang <wangxi11@huawei.com>
Date: Mon, 24 Feb 2020 14:37:38 +0800
Subject: RDMA/hns: Optimize qp doorbell allocation flow
Patch-mainline: v5.7-rc1
Git-commit: cfec045b822a1c3f8f47604520d3194729d9d2af
References: jsc#SLE-14777
Encapsulate the kernel qp doorbell allocation related code into 2
functions: alloc_qp_db() and free_qp_db().
Link: https://lore.kernel.org/r/1582526258-13825-8-git-send-email-liweihang@huawei.com
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/hns/hns_roce_qp.c | 234 ++++++++++++++++++--------------
1 file changed, 132 insertions(+), 102 deletions(-)
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -843,7 +843,7 @@ static int alloc_qp_buf(struct hns_roce_
}
if (udata) {
- hr_qp->umem = ib_umem_get(udata, addr, hr_qp->buff_size, 0);
+ hr_qp->umem = ib_umem_get(ibdev, addr, hr_qp->buff_size, 0);
if (IS_ERR(hr_qp->umem)) {
ret = PTR_ERR(hr_qp->umem);
goto err_inline;
@@ -895,6 +895,114 @@ static void free_qp_buf(struct hns_roce_
free_rq_inline_buf(hr_qp);
}
+static inline bool user_qp_has_sdb(struct hns_roce_dev *hr_dev,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata,
+ struct hns_roce_ib_create_qp_resp *resp,
+ struct hns_roce_ib_create_qp *ucmd)
+{
+ return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SQ_RECORD_DB) &&
+ udata->outlen >= offsetofend(typeof(*resp), cap_flags) &&
+ hns_roce_qp_has_sq(init_attr) &&
+ udata->inlen >= offsetofend(typeof(*ucmd), sdb_addr));
+}
+
+static inline bool user_qp_has_rdb(struct hns_roce_dev *hr_dev,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata,
+ struct hns_roce_ib_create_qp_resp *resp)
+{
+ return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
+ udata->outlen >= offsetofend(typeof(*resp), cap_flags) &&
+ hns_roce_qp_has_rq(init_attr));
+}
+
+static inline bool kernel_qp_has_rdb(struct hns_roce_dev *hr_dev,
+ struct ib_qp_init_attr *init_attr)
+{
+ return ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
+ hns_roce_qp_has_rq(init_attr));
+}
+
+static int alloc_qp_db(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata,
+ struct hns_roce_ib_create_qp *ucmd,
+ struct hns_roce_ib_create_qp_resp *resp)
+{
+ struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(
+ udata, struct hns_roce_ucontext, ibucontext);
+ struct ib_device *ibdev = &hr_dev->ib_dev;
+ int ret;
+
+ if (udata) {
+ if (user_qp_has_sdb(hr_dev, init_attr, udata, resp, ucmd)) {
+ ret = hns_roce_db_map_user(uctx, udata, ucmd->sdb_addr,
+ &hr_qp->sdb);
+ if (ret) {
+ ibdev_err(ibdev,
+ "Failed to map user SQ doorbell\n");
+ goto err_out;
+ }
+ hr_qp->sdb_en = 1;
+ resp->cap_flags |= HNS_ROCE_SUPPORT_SQ_RECORD_DB;
+ }
+
+ if (user_qp_has_rdb(hr_dev, init_attr, udata, resp)) {
+ ret = hns_roce_db_map_user(uctx, udata, ucmd->db_addr,
+ &hr_qp->rdb);
+ if (ret) {
+ ibdev_err(ibdev,
+ "Failed to map user RQ doorbell\n");
+ goto err_sdb;
+ }
+ hr_qp->rdb_en = 1;
+ resp->cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
+ }
+ } else {
+ /* QP doorbell register address */
+ hr_qp->sq.db_reg_l = hr_dev->reg_base + hr_dev->sdb_offset +
+ DB_REG_OFFSET * hr_dev->priv_uar.index;
+ hr_qp->rq.db_reg_l = hr_dev->reg_base + hr_dev->odb_offset +
+ DB_REG_OFFSET * hr_dev->priv_uar.index;
+
+ if (kernel_qp_has_rdb(hr_dev, init_attr)) {
+ ret = hns_roce_alloc_db(hr_dev, &hr_qp->rdb, 0);
+ if (ret) {
+ ibdev_err(ibdev,
+ "Failed to alloc kernel RQ doorbell\n");
+ goto err_out;
+ }
+ *hr_qp->rdb.db_record = 0;
+ hr_qp->rdb_en = 1;
+ }
+ }
+
+ return 0;
+err_sdb:
+ if (udata && hr_qp->sdb_en)
+ hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
+err_out:
+ return ret;
+}
+
+static void free_qp_db(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp,
+ struct ib_udata *udata)
+{
+ struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(
+ udata, struct hns_roce_ucontext, ibucontext);
+
+ if (udata) {
+ if (hr_qp->rdb_en)
+ hns_roce_db_unmap_user(uctx, &hr_qp->rdb);
+ if (hr_qp->sdb_en)
+ hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
+ } else {
+ if (hr_qp->rdb_en)
+ hns_roce_free_db(hr_dev, &hr_qp->rdb);
+ }
+}
+
static int alloc_kernel_wrid(struct hns_roce_dev *hr_dev,
struct hns_roce_qp *hr_qp)
{
@@ -991,11 +1099,9 @@ static int hns_roce_create_qp_common(str
struct ib_udata *udata,
struct hns_roce_qp *hr_qp)
{
- struct device *dev = hr_dev->dev;
- struct hns_roce_ib_create_qp ucmd;
struct hns_roce_ib_create_qp_resp resp = {};
- struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(
- udata, struct hns_roce_ucontext, ibucontext);
+ struct ib_device *ibdev = &hr_dev->ib_dev;
+ struct hns_roce_ib_create_qp ucmd;
int ret;
mutex_init(&hr_qp->mutex);
@@ -1007,95 +1113,55 @@ static int hns_roce_create_qp_common(str
ret = set_qp_param(hr_dev, hr_qp, init_attr, udata, &ucmd);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to set QP param\n");
+ ibdev_err(ibdev, "Failed to set QP param\n");
return ret;
}
- if (udata) {
- if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SQ_RECORD_DB) &&
- (udata->inlen >= sizeof(ucmd)) &&
- (udata->outlen >= sizeof(resp)) &&
- hns_roce_qp_has_sq(init_attr)) {
- ret = hns_roce_db_map_user(uctx, udata, ucmd.sdb_addr,
- &hr_qp->sdb);
- if (ret) {
- dev_err(dev, "sq record doorbell map failed!\n");
- goto err_out;
- }
-
- /* indicate kernel supports sq record db */
- resp.cap_flags |= HNS_ROCE_SUPPORT_SQ_RECORD_DB;
- hr_qp->sdb_en = 1;
- }
-
- if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
- (udata->outlen >= sizeof(resp)) &&
- hns_roce_qp_has_rq(init_attr)) {
- ret = hns_roce_db_map_user(uctx, udata, ucmd.db_addr,
- &hr_qp->rdb);
- if (ret) {
- dev_err(dev, "rq record doorbell map failed!\n");
- goto err_sq_dbmap;
- }
-
- /* indicate kernel supports rq record db */
- resp.cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
- hr_qp->rdb_en = 1;
- }
- } else {
- /* QP doorbell register address */
- hr_qp->sq.db_reg_l = hr_dev->reg_base + hr_dev->sdb_offset +
- DB_REG_OFFSET * hr_dev->priv_uar.index;
- hr_qp->rq.db_reg_l = hr_dev->reg_base + hr_dev->odb_offset +
- DB_REG_OFFSET * hr_dev->priv_uar.index;
-
- if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
- hns_roce_qp_has_rq(init_attr)) {
- ret = hns_roce_alloc_db(hr_dev, &hr_qp->rdb, 0);
- if (ret) {
- dev_err(dev, "rq record doorbell alloc failed!\n");
- goto err_out;
- }
- *hr_qp->rdb.db_record = 0;
- hr_qp->rdb_en = 1;
- }
-
+ if (!udata) {
ret = alloc_kernel_wrid(hr_dev, hr_qp);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to alloc wrid\n");
- goto err_db;
+ ibdev_err(ibdev, "Failed to alloc wrid\n");
+ return ret;
}
}
+ ret = alloc_qp_db(hr_dev, hr_qp, init_attr, udata, &ucmd, &resp);
+ if (ret) {
+ ibdev_err(ibdev, "Failed to alloc QP doorbell\n");
+ goto err_wrid;
+ }
+
ret = alloc_qp_buf(hr_dev, hr_qp, init_attr, udata, ucmd.buf_addr);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to alloc QP buffer\n");
+ ibdev_err(ibdev, "Failed to alloc QP buffer\n");
goto err_db;
}
ret = alloc_qpn(hr_dev, hr_qp);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to alloc QPN\n");
+ ibdev_err(ibdev, "Failed to alloc QPN\n");
goto err_buf;
}
ret = alloc_qpc(hr_dev, hr_qp);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to alloc QP context\n");
+ ibdev_err(ibdev, "Failed to alloc QP context\n");
goto err_qpn;
}
ret = hns_roce_qp_store(hr_dev, hr_qp, init_attr);
if (ret) {
- ibdev_err(&hr_dev->ib_dev, "Failed to store QP\n");
+ ibdev_err(ibdev, "Failed to store QP\n");
goto err_qpc;
}
if (udata) {
ret = ib_copy_to_udata(udata, &resp,
min(udata->outlen, sizeof(resp)));
- if (ret)
+ if (ret) {
+ ibdev_err(ibdev, "copy qp resp failed!\n");
goto err_store;
+ }
}
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_FLOW_CTRL) {
@@ -1119,30 +1185,10 @@ err_qpn:
free_qpn(hr_dev, hr_qp);
err_buf:
free_qp_buf(hr_dev, hr_qp);
-
- free_kernel_wrid(hr_dev, hr_qp);
-
- if (udata) {
- if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
- (udata->outlen >= sizeof(resp)) &&
- hns_roce_qp_has_rq(init_attr))
- hns_roce_db_unmap_user(uctx, &hr_qp->rdb);
- }
-
-err_sq_dbmap:
- if (udata)
- if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SQ_RECORD_DB) &&
- (udata->inlen >= sizeof(ucmd)) &&
- (udata->outlen >= sizeof(resp)) &&
- hns_roce_qp_has_sq(init_attr))
- hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
-
err_db:
- if (!udata && hns_roce_qp_has_rq(init_attr) &&
- (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB))
- hns_roce_free_db(hr_dev, &hr_qp->rdb);
-
-err_out:
+ free_qp_db(hr_dev, hr_qp, udata);
+err_wrid:
+ free_kernel_wrid(hr_dev, hr_qp);
return ret;
}
@@ -1157,23 +1203,7 @@ void hns_roce_qp_destroy(struct hns_roce
free_qpn(hr_dev, hr_qp);
free_qp_buf(hr_dev, hr_qp);
free_kernel_wrid(hr_dev, hr_qp);
-
- if (udata) {
- struct hns_roce_ucontext *context =
- rdma_udata_to_drv_context(
- udata,
- struct hns_roce_ucontext,
- ibucontext);
-
- if (hr_qp->sq.wqe_cnt && (hr_qp->sdb_en == 1))
- hns_roce_db_unmap_user(context, &hr_qp->sdb);
-
- if (hr_qp->rq.wqe_cnt && (hr_qp->rdb_en == 1))
- hns_roce_db_unmap_user(context, &hr_qp->rdb);
- } else {
- if (hr_qp->rq.wqe_cnt)
- hns_roce_free_db(hr_dev, &hr_qp->rdb);
- }
+ free_qp_db(hr_dev, hr_qp, udata);
kfree(hr_qp);
}