Patch "octeontx2-af: Fix truncation of smq in CN10K NIX AQ enqueue mbox handler" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    octeontx2-af: Fix truncation of smq in CN10K NIX AQ enqueue mbox handler

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     octeontx2-af-fix-truncation-of-smq-in-cn10k-nix-aq-e.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit e18836ca6bfa88f98eb4d72dba7951eeae3a7807
Author: Geetha sowjanya <gakula@xxxxxxxxxxx>
Date:   Tue Sep 5 12:18:16 2023 +0530

    octeontx2-af: Fix truncation of smq in CN10K NIX AQ enqueue mbox handler
    
    [ Upstream commit 29fe7a1b62717d58f033009874554d99d71f7d37 ]
    
    The smq value used in the CN10K NIX AQ instruction enqueue mailbox
    handler was truncated to 9-bit value from 10-bit value because of
    typecasting the CN10K mbox request structure to the CN9K structure.
    Though this hasn't caused any problems when programming the NIX SQ
    context to the HW because the context structure is the same size.
    However, this causes a problem when accessing the structure parameters.
    This patch reads the right smq value for each platform.
    
    Fixes: 30077d210c83 ("octeontx2-af: cn10k: Update NIX/NPA context structure")
    Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxx>
    Signed-off-by: Sunil Kovvuri Goutham <sgoutham@xxxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index f5922d63e33e4..1593efc4502b5 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -841,6 +841,21 @@ static int nix_aq_enqueue_wait(struct rvu *rvu, struct rvu_block *block,
 	return 0;
 }
 
+static void nix_get_aq_req_smq(struct rvu *rvu, struct nix_aq_enq_req *req,
+			       u16 *smq, u16 *smq_mask)
+{
+	struct nix_cn10k_aq_enq_req *aq_req;
+
+	if (!is_rvu_otx2(rvu)) {
+		aq_req = (struct nix_cn10k_aq_enq_req *)req;
+		*smq = aq_req->sq.smq;
+		*smq_mask = aq_req->sq_mask.smq;
+	} else {
+		*smq = req->sq.smq;
+		*smq_mask = req->sq_mask.smq;
+	}
+}
+
 static int rvu_nix_blk_aq_enq_inst(struct rvu *rvu, struct nix_hw *nix_hw,
 				   struct nix_aq_enq_req *req,
 				   struct nix_aq_enq_rsp *rsp)
@@ -852,6 +867,7 @@ static int rvu_nix_blk_aq_enq_inst(struct rvu *rvu, struct nix_hw *nix_hw,
 	struct rvu_block *block;
 	struct admin_queue *aq;
 	struct rvu_pfvf *pfvf;
+	u16 smq, smq_mask;
 	void *ctx, *mask;
 	bool ena;
 	u64 cfg;
@@ -923,13 +939,14 @@ static int rvu_nix_blk_aq_enq_inst(struct rvu *rvu, struct nix_hw *nix_hw,
 	if (rc)
 		return rc;
 
+	nix_get_aq_req_smq(rvu, req, &smq, &smq_mask);
 	/* Check if SQ pointed SMQ belongs to this PF/VF or not */
 	if (req->ctype == NIX_AQ_CTYPE_SQ &&
 	    ((req->op == NIX_AQ_INSTOP_INIT && req->sq.ena) ||
 	     (req->op == NIX_AQ_INSTOP_WRITE &&
-	      req->sq_mask.ena && req->sq_mask.smq && req->sq.ena))) {
+	      req->sq_mask.ena && req->sq.ena && smq_mask))) {
 		if (!is_valid_txschq(rvu, blkaddr, NIX_TXSCH_LVL_SMQ,
-				     pcifunc, req->sq.smq))
+				     pcifunc, smq))
 			return NIX_AF_ERR_AQ_ENQUEUE;
 	}