[SRU][R:linux-gcp][PATCH v3 6/9] RDMA/irdma: Remove redundant legacy_mode checks

[Ian Whitfield]

From: Jacob Moroni <jmoroni at google.com>

BugLink: https://bugs.launchpad.net/bugs/2165062

The driver has the following invariants:

1. legacy_mode is only allowed on GEN_1 hardware (enforced
   in irdma_alloc_ucontext).

2. GEN_1 hardware does not set IRDMA_FEATURE_CQ_RESIZE or
   IRDMA_FEATURE_RTS_AE. These feature flags are only set
   for GEN_2 and GEN_3 hardware.

Therefore, legacy_mode is always false if IRDMA_FEATURE_CQ_RESIZE
or IRDMA_FEATURE_RTS_AE is set, so remove the redundant checks.

Link: https://patch.msgid.link/r/20260602214423.1315105-1-jmoroni@google.com
Signed-off-by: Jacob Moroni <jmoroni at google.com>
Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
(cherry picked from commit ed8621be482bf18dcd217aa024e95758bf9d28f2)
Signed-off-by: Ian Whitfield <ian.whitfield at canonical.com>
---
 drivers/infiniband/hw/irdma/uk.c    | 9 +++------
 drivers/infiniband/hw/irdma/user.h  | 1 -
 drivers/infiniband/hw/irdma/verbs.c | 7 +------
 3 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/infiniband/hw/irdma/uk.c b/drivers/infiniband/hw/irdma/uk.c
index 4718acf6c6fd0..a34883fe99836 100644
--- a/drivers/infiniband/hw/irdma/uk.c
+++ b/drivers/infiniband/hw/irdma/uk.c
@@ -1568,15 +1568,12 @@ static const struct irdma_wqe_uk_ops iw_wqe_uk_ops_gen_1 = {
  * irdma_setup_connection_wqes - setup WQEs necessary to complete
  * connection.
  * @qp: hw qp (user and kernel)
- * @info: qp initialization info
  */
-static void irdma_setup_connection_wqes(struct irdma_qp_uk *qp,
-					struct irdma_qp_uk_init_info *info)
+static void irdma_setup_connection_wqes(struct irdma_qp_uk *qp)
 {
 	u16 move_cnt = 1;
 
-	if (!info->legacy_mode &&
-	    (qp->uk_attrs->feature_flags & IRDMA_FEATURE_RTS_AE))
+	if (qp->uk_attrs->feature_flags & IRDMA_FEATURE_RTS_AE)
 		move_cnt = 3;
 
 	qp->conn_wqes = move_cnt;
@@ -1727,7 +1724,7 @@ int irdma_uk_qp_init(struct irdma_qp_uk *qp, struct irdma_qp_uk_init_info *info)
 	sq_ring_size = qp->sq_size << info->sq_shift;
 	IRDMA_RING_INIT(qp->sq_ring, sq_ring_size);
 	if (info->first_sq_wq) {
-		irdma_setup_connection_wqes(qp, info);
+		irdma_setup_connection_wqes(qp);
 		qp->swqe_polarity = 1;
 		qp->first_sq_wq = true;
 	} else {
diff --git a/drivers/infiniband/hw/irdma/user.h b/drivers/infiniband/hw/irdma/user.h
index 008af1acc9288..4dd3776a4cddb 100644
--- a/drivers/infiniband/hw/irdma/user.h
+++ b/drivers/infiniband/hw/irdma/user.h
@@ -563,7 +563,6 @@ struct irdma_qp_uk_init_info {
 	u8 sq_shift;
 	u8 rq_shift;
 	int abi_ver;
-	bool legacy_mode;
 	struct irdma_srq_uk *srq_uk;
 };
 
diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 1caf416a85027..a03724512b37a 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -632,7 +632,6 @@ static int irdma_setup_umode_qp(struct ib_udata *udata,
 	iwqp->ctx_info.qp_compl_ctx = req.user_compl_ctx;
 	iwqp->user_mode = 1;
 	if (req.user_wqe_bufs) {
-		info->qp_uk_init_info.legacy_mode = ucontext->legacy_mode;
 		spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
 		iwqp->iwpbl = irdma_get_pbl((unsigned long)req.user_wqe_bufs,
 					    &ucontext->qp_reg_mem_list);
@@ -2072,10 +2071,6 @@ static int irdma_resize_cq(struct ib_cq *ibcq, int entries,
 			rdma_udata_to_drv_context(udata, struct irdma_ucontext,
 						  ibucontext);
 
-		/* CQ resize not supported with legacy GEN_1 libi40iw */
-		if (ucontext->legacy_mode)
-			return -EOPNOTSUPP;
-
 		if (ib_copy_from_udata(&req, udata,
 				       min(sizeof(req), udata->inlen)))
 			return -EINVAL;
@@ -2557,7 +2552,7 @@ static int irdma_create_cq(struct ib_cq *ibcq,
 		cqmr = &iwpbl->cq_mr;
 
 		if (rf->sc_dev.hw_attrs.uk_attrs.feature_flags &
-		    IRDMA_FEATURE_CQ_RESIZE && !ucontext->legacy_mode) {
+		    IRDMA_FEATURE_CQ_RESIZE) {
 			spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
 			iwpbl_shadow = irdma_get_pbl(
 					(unsigned long)req.user_shadow_area,
-- 
2.43.0