[net PATCH] octeontx2-af: Fix SDP MAC link credits configuration

Geetha sowjanya
2024-11-26T11:45:04Z

Current driver allows only packet size < 512B as SDP_LINK_CREDIT
register is set to default value.
This patch fixes this issue by configure the register with
maximum HW supported value to allow packet size > 512B.

Fixes: 2f7f33a09516 ("octeontx2-pf: Add representors for sdp MAC")
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
---
drivers/net/ethernet/marvell/octeontx2/af/common.h | 1 +
drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 3 +++
2 files changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/common.h b/drivers/net/ethernet/marvell/octeontx2/af/common.h
index 5d84386ed22d..406c59100a35 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/common.h
@@ -159,6 +159,7 @@ enum nix_scheduler {
#define SDP_HW_MIN_FRS 16
#define CN10K_LMAC_LINK_MAX_FRS 16380 /* 16k - FCS */
#define CN10K_LBK_LINK_MAX_FRS 65535 /* 64k */
+#define SDP_LINK_CREDIT 0x320202

/* NIX RX action operation*/
#define NIX_RX_ACTIONOP_DROP (0x0ull)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 5d5a01dbbca1..a5d1e2bddd58 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -4672,6 +4672,9 @@ static void nix_link_config(struct rvu *rvu, int blkaddr,
rvu_get_lbk_link_max_frs(rvu, &lbk_max_frs);
rvu_get_lmac_link_max_frs(rvu, &lmac_max_frs);

+ /* Set SDP link credit */
+ rvu_write64(rvu, blkaddr, NIX_AF_SDP_LINK_CREDIT, SDP_LINK_CREDIT);
+
/* Set default min/max packet lengths allowed on NIX Rx links.
*
* With HW reset minlen value of 60byte, HW will treat ARP pkts
--
2.25.1