[PATCH v11 rdma-next 7/7] RDMA/qedr: Add iWARP doorbell recovery support

Michal Kalderon
2019-09-05T10:03:23Z

This patch adds the iWARP specific doorbells to the doorbell
recovery mechanism

Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
---
drivers/infiniband/hw/qedr/qedr.h | 12 +++++++-----
drivers/infiniband/hw/qedr/verbs.c | 37 ++++++++++++++++++++++++++++++++++++-
2 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/hw/qedr/qedr.h b/drivers/infiniband/hw/qedr/qedr.h
index 04f6f4fbe276..7661d767815c 100644
--- a/drivers/infiniband/hw/qedr/qedr.h
+++ b/drivers/infiniband/hw/qedr/qedr.h
@@ -237,6 +237,11 @@ struct qedr_ucontext {
bool db_rec;
};

+union db_prod32 {
+ struct rdma_pwm_val16_data data;
+ u32 raw;
+};
+
union db_prod64 {
struct rdma_pwm_val32_data data;
u64 raw;
@@ -268,6 +273,8 @@ struct qedr_userq {
struct qedr_user_db_rec *db_rec_data;
u64 db_rec_phys;
u64 db_rec_key;
+ void __iomem *db_rec_db2_addr;
+ union db_prod32 db_rec_db2_data;
};

struct qedr_cq {
@@ -303,11 +310,6 @@ struct qedr_pd {
struct qedr_ucontext *uctx;
};

-union db_prod32 {
- struct rdma_pwm_val16_data data;
- u32 raw;
-};
-
struct qedr_qp_hwq_info {
/* WQE Elements */
struct qed_chain pbl;
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 922c203ca0ea..524dd3682d8d 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -1738,6 +1738,10 @@ static void qedr_cleanup_user(struct qedr_dev *dev,
rdma_user_mmap_entry_remove(&ctx->ibucontext,
qp->urq.db_rec_key);
}
+
+ if (rdma_protocol_iwarp(&dev->ibdev, 1))
+ qedr_db_recovery_del(dev, qp->urq.db_rec_db2_addr,
+ &qp->urq.db_rec_db2_data);
}

static int qedr_create_user_qp(struct qedr_dev *dev,
@@ -1812,6 +1816,17 @@ static int qedr_create_user_qp(struct qedr_dev *dev,
qp->usq.db_addr = ctx->dpi_addr + uresp.sq_db_offset;
qp->urq.db_addr = ctx->dpi_addr + uresp.rq_db_offset;

+ if (rdma_protocol_iwarp(&dev->ibdev, 1)) {
+ qp->urq.db_rec_db2_addr = ctx->dpi_addr + uresp.rq_db2_offset;
+
+ /* calculate the db_rec_db2 data since it is constant so no
+ * need to reflect from user
+ */
+ qp->urq.db_rec_db2_data.data.icid = cpu_to_le16(qp->icid);
+ qp->urq.db_rec_db2_data.data.value =
+ cpu_to_le16(DQ_TCM_IWARP_POST_RQ_CF_CMD);
+ }
+
rc = qedr_db_recovery_add(dev, qp->usq.db_addr,
&qp->usq.db_rec_data->db_data,
DB_REC_WIDTH_32B,
@@ -1825,6 +1840,15 @@ static int qedr_create_user_qp(struct qedr_dev *dev,
DB_REC_USER);
if (rc)
goto err;
+
+ if (rdma_protocol_iwarp(&dev->ibdev, 1)) {
+ rc = qedr_db_recovery_add(dev, qp->urq.db_rec_db2_addr,
+ &qp->urq.db_rec_db2_data,
+ DB_REC_WIDTH_32B,
+ DB_REC_USER);
+ if (rc)
+ goto err;
+ }
qedr_qp_user_print(dev, qp);

return rc;
@@ -1865,7 +1889,13 @@ static int qedr_set_iwarp_db_info(struct qedr_dev *dev, struct qedr_qp *qp)
&qp->rq.db_data,
DB_REC_WIDTH_32B,
DB_REC_KERNEL);
+ if (rc)
+ return rc;

+ rc = qedr_db_recovery_add(dev, qp->rq.iwarp_db2,
+ &qp->rq.iwarp_db2_data,
+ DB_REC_WIDTH_32B,
+ DB_REC_KERNEL);
return rc;
}

@@ -1994,8 +2024,13 @@ static void qedr_cleanup_kernel(struct qedr_dev *dev, struct qedr_qp *qp)

qedr_db_recovery_del(dev, qp->sq.db, &qp->sq.db_data);

- if (!qp->srq)
+ if (!qp->srq) {
qedr_db_recovery_del(dev, qp->rq.db, &qp->rq.db_data);
+
+ if (rdma_protocol_iwarp(&dev->ibdev, 1))
+ qedr_db_recovery_del(dev, qp->rq.iwarp_db2,
+ &qp->rq.iwarp_db2_data);
+ }
}

static int qedr_create_kernel_qp(struct qedr_dev *dev,
--
2.14.5