[PATCH net-next v2] net: mana: Use the HWC destination queues reported by the hardware

[Manish Awasthi <mawasthi@linux.microsoft.com>]

The hardware provides valid HWC destination vRQ and vRCQ IDs for all PFs
and VFs. Use these IDs unconditionally in mana_hwc_send_request(), as
the PF-specific gate is not required.

Signed-off-by: Manish Awasthi <mawasthi@linux.microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
Changes in v2:
- State that the hardware supplies valid destination IDs for all PFs and
  VFs, so the PF-specific gate is unnecessary.
- Drop the PF prefix from the context fields and init-event constants.

v1:
https://lore.kernel.org/netdev/20260903184104.3194819-1-mawasthi@linux.microsoft.com/

 drivers/net/ethernet/microsoft/mana/hw_channel.c | 24 +++++++++++++-----------
 include/net/mana/hw_channel.h                    |  8 ++++----
 2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.c b/drivers/net/ethernet/microsoft/mana/hw_channel.c
index 263e7c4e2934186af037be4c80350a6e322b6771..3bca4b683134b8e5461c4071d59f6085da954cd7 100644
--- a/drivers/net/ethernet/microsoft/mana/hw_channel.c
+++ b/drivers/net/ethernet/microsoft/mana/hw_channel.c
@@ -170,12 +170,12 @@ static void mana_hwc_init_event_handler(void *ctx, struct gdma_queue *q_self,
 			hwc->txq->msg_buf->gpa_mkey = val;
 			break;
 
-		case HWC_INIT_DATA_PF_DEST_RQ_ID:
-			hwc->pf_dest_vrq_id = val;
+		case HWC_INIT_DATA_DEST_RQ_ID:
+			hwc->dest_vrq_id = val;
 			break;
 
-		case HWC_INIT_DATA_PF_DEST_CQ_ID:
-			hwc->pf_dest_vrcq_id = val;
+		case HWC_INIT_DATA_DEST_CQ_ID:
+			hwc->dest_vrcq_id = val;
 			break;
 		}
 
@@ -855,13 +855,12 @@ void mana_hwc_destroy_channel(struct gdma_context *gc)
 int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
 			  const void *req, u32 resp_len, void *resp)
 {
-	struct gdma_context *gc = hwc->gdma_dev->gdma_context;
 	struct hwc_work_request *tx_wr;
 	struct hwc_wq *txq = hwc->txq;
 	struct gdma_req_hdr *req_msg;
 	struct hwc_caller_ctx *ctx;
-	u32 dest_vrcq = 0;
-	u32 dest_vrq = 0;
+	u32 dest_vrcq;
+	u32 dest_vrq;
 	u32 command;
 	u16 msg_id;
 	int err;
@@ -890,10 +889,13 @@ int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
 	tx_wr->msg_size = req_len;
 	command = req_msg->req.msg_type;
 
-	if (gc->is_pf) {
-		dest_vrq = hwc->pf_dest_vrq_id;
-		dest_vrcq = hwc->pf_dest_vrcq_id;
-	}
+	/* The hardware reports the HWC destination queues through
+	 * HWC_INIT_DATA_DEST_RQ_ID and HWC_INIT_DATA_DEST_CQ_ID, and
+	 * always supplies values that are valid for this function, so no
+	 * PF-specific handling is needed here.
+	 */
+	dest_vrq = hwc->dest_vrq_id;
+	dest_vrcq = hwc->dest_vrcq_id;
 
 	err = mana_hwc_post_tx_wqe(txq, tx_wr, dest_vrq, dest_vrcq, false);
 	if (err) {
diff --git a/include/net/mana/hw_channel.h b/include/net/mana/hw_channel.h
index 16feb39616c1bead1a043b3fadc2e18a90651516..1ab2d66c891e42f3a847e62acf75b69fcf7ffb1e 100644
--- a/include/net/mana/hw_channel.h
+++ b/include/net/mana/hw_channel.h
@@ -20,8 +20,8 @@
 #define HWC_INIT_DATA_MAX_NUM_CQS	7
 #define HWC_INIT_DATA_PDID		8
 #define HWC_INIT_DATA_GPA_MKEY		9
-#define HWC_INIT_DATA_PF_DEST_RQ_ID	10
-#define HWC_INIT_DATA_PF_DEST_CQ_ID	11
+#define HWC_INIT_DATA_DEST_RQ_ID	10
+#define HWC_INIT_DATA_DEST_CQ_ID	11
 
 #define HWC_DATA_CFG_HWC_TIMEOUT 1
 #define HWC_DATA_HW_LINK_CONNECT 2
@@ -195,8 +195,8 @@ struct hw_channel_context {
 	struct semaphore sema;
 	struct gdma_resource inflight_msg_res;
 
-	u32 pf_dest_vrq_id;
-	u32 pf_dest_vrcq_id;
+	u32 dest_vrq_id;
+	u32 dest_vrcq_id;
 	u32 hwc_timeout;
 
 	struct hwc_caller_ctx *caller_ctx;

base-commit: ce48a0fdc56464b1afb03471dbdf38a5e0d571ad
-- 
2.54.0