[PATCH 2/3] RDMA/ionic: Expose QP transport mode and RCQ sign bit to userspace

[Abhijit Gangurde <abhijit.gangurde@amd.com>]

Read the default_qp_transport_mode and rcq_sign_bit fields from the
RDMA LIF identity reported by firmware, store them in the driver's
lif_cfg, and expose them to userspace via the ucontext response.

The default_qp_transport_mode indicates which QP transport type the device
uses. The rcq_sign_bit indicates the Reorder Completion Queue
(RCQ) sign bit capability.

Co-developed-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
---
 drivers/infiniband/hw/ionic/ionic_controlpath.c | 4 +++-
 drivers/infiniband/hw/ionic/ionic_lif_cfg.c     | 2 ++
 drivers/infiniband/hw/ionic/ionic_lif_cfg.h     | 2 ++
 include/uapi/rdma/ionic-abi.h                   | 4 +++-
 4 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/ionic/ionic_controlpath.c b/drivers/infiniband/hw/ionic/ionic_controlpath.c
index 7051a81cca94..6bb645713d6b 100644
--- a/drivers/infiniband/hw/ionic/ionic_controlpath.c
+++ b/drivers/infiniband/hw/ionic/ionic_controlpath.c
@@ -408,13 +408,15 @@ int ionic_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata)
 
 	resp.udma_count = dev->lif_cfg.udma_count;
 	resp.expdb_mask = dev->lif_cfg.expdb_mask;
+	resp.rcq_sign_bit = dev->lif_cfg.rcq_sign_bit;
+	resp.default_qp_transport_mode = dev->lif_cfg.default_qp_transport_mode;
 
 	if (dev->lif_cfg.sq_expdb)
 		resp.expdb_qtypes |= IONIC_EXPDB_SQ;
 	if (dev->lif_cfg.rq_expdb)
 		resp.expdb_qtypes |= IONIC_EXPDB_RQ;
 
-	rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
+	rc = ib_respond_udata(udata, resp);
 	if (rc)
 		goto err_resp;
 
diff --git a/drivers/infiniband/hw/ionic/ionic_lif_cfg.c b/drivers/infiniband/hw/ionic/ionic_lif_cfg.c
index f3cd281c3a2f..2a27dd22e4c4 100644
--- a/drivers/infiniband/hw/ionic/ionic_lif_cfg.c
+++ b/drivers/infiniband/hw/ionic/ionic_lif_cfg.c
@@ -84,6 +84,8 @@ void ionic_fill_lif_cfg(struct ionic_lif *lif, struct ionic_lif_cfg *cfg)
 	cfg->udma_count = 2;
 
 	cfg->max_stride = ident->rdma.max_stride;
+	cfg->rcq_sign_bit = ident->rdma.rcq_sign_bit;
+	cfg->default_qp_transport_mode = ident->rdma.default_qp_transport_mode;
 	cfg->expdb_mask = ionic_get_expdb(lif);
 
 	cfg->sq_expdb =
diff --git a/drivers/infiniband/hw/ionic/ionic_lif_cfg.h b/drivers/infiniband/hw/ionic/ionic_lif_cfg.h
index 20853429f623..abf169d2727a 100644
--- a/drivers/infiniband/hw/ionic/ionic_lif_cfg.h
+++ b/drivers/infiniband/hw/ionic/ionic_lif_cfg.h
@@ -56,6 +56,8 @@ struct ionic_lif_cfg {
 	bool sq_expdb;
 	bool rq_expdb;
 	u8 expdb_mask;
+	u8 rcq_sign_bit;
+	u8 default_qp_transport_mode;
 };
 
 void ionic_fill_lif_cfg(struct ionic_lif *lif, struct ionic_lif_cfg *cfg);
diff --git a/include/uapi/rdma/ionic-abi.h b/include/uapi/rdma/ionic-abi.h
index 7b589d3e9728..fb0d13094c12 100644
--- a/include/uapi/rdma/ionic-abi.h
+++ b/include/uapi/rdma/ionic-abi.h
@@ -46,8 +46,10 @@ struct ionic_ctx_resp {
 	__u8 udma_count;
 	__u8 expdb_mask;
 	__u8 expdb_qtypes;
+	__u8 rcq_sign_bit;
+	__u8 default_qp_transport_mode;
 
-	__u8 rsvd2[3];
+	__u8 rsvd2;
 };
 
 struct ionic_qdesc {
-- 
2.43.0