linux-kernel - [PATCH net,v2,1/5] octeontx2-af: replace cpt slot with lf id on reg write

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Message-ID: <20240710075127.2274582-2-schalla@marvell.com>
Date: Wed, 10 Jul 2024 13:21:23 +0530
From: Srujana Challa <schalla@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <kuba@...nel.org>, <davem@...emloft.net>, <pabeni@...hat.com>,
        <edumazet@...gle.com>, <sgoutham@...vell.com>, <lcherian@...vell.com>,
        <gakula@...vell.com>, <jerinj@...vell.com>, <hkelam@...vell.com>,
        <sbhatta@...vell.com>, <ndabilpuram@...vell.com>,
        <schalla@...vell.com>
Subject: [PATCH net,v2,1/5] octeontx2-af: replace cpt slot with lf id on reg write

From: Nithin Dabilpuram <ndabilpuram@...vell.com>

Replace slot id with global CPT lf id on reg read/write as
CPTPF/VF driver would send slot number instead of global
lf id in the reg offset. And also update the mailbox response
with the global lf's register offset.

Fixes: ae454086e3c2 ("octeontx2-af: add mailbox interface for CPT")
Signed-off-by: Nithin Dabilpuram <ndabilpuram@...vell.com>
---
 .../ethernet/marvell/octeontx2/af/rvu_cpt.c   | 23 +++++++++++++------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
index f047185f38e0..3e09d2285814 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
@@ -696,7 +696,8 @@ int rvu_mbox_handler_cpt_rd_wr_register(struct rvu *rvu,
 					struct cpt_rd_wr_reg_msg *req,
 					struct cpt_rd_wr_reg_msg *rsp)
 {
-	int blkaddr;
+	u64 offset = req->reg_offset;
+	int blkaddr, lf;
 
 	blkaddr = validate_and_get_cpt_blkaddr(req->blkaddr);
 	if (blkaddr < 0)
@@ -707,17 +708,25 @@ int rvu_mbox_handler_cpt_rd_wr_register(struct rvu *rvu,
 	    !is_cpt_vf(rvu, req->hdr.pcifunc))
 		return CPT_AF_ERR_ACCESS_DENIED;
 
-	rsp->reg_offset = req->reg_offset;
-	rsp->ret_val = req->ret_val;
-	rsp->is_write = req->is_write;
-
 	if (!is_valid_offset(rvu, req))
 		return CPT_AF_ERR_ACCESS_DENIED;
 
+	/* Translate local LF used by VFs to global CPT LF */
+	lf = rvu_get_lf(rvu, &rvu->hw->block[blkaddr], req->hdr.pcifunc,
+			(offset & 0xFFF) >> 3);
+
+	/* Translate local LF's offset to global CPT LF's offset */
+	offset &= 0xFF000;
+	offset += lf << 3;
+
+	rsp->reg_offset = offset;
+	rsp->ret_val = req->ret_val;
+	rsp->is_write = req->is_write;
+
 	if (req->is_write)
-		rvu_write64(rvu, blkaddr, req->reg_offset, req->val);
+		rvu_write64(rvu, blkaddr, offset, req->val);
 	else
-		rsp->val = rvu_read64(rvu, blkaddr, req->reg_offset);
+		rsp->val = rvu_read64(rvu, blkaddr, offset);
 
 	return 0;
 }
-- 
2.25.1