octeontx2-af: Fix SDP MAC link credits configuration

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/common.h b/drivers/net/ethernet/marvell/octeontx2/af/common.h
index 5d84386ed22da2ee0bec5dbbc2dd30aa5ac935ba..406c59100a35a1c6ed2770846fa6657f06aacb8a 100644 (file)
--- 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 5d5a01dbbca11530904bf71531ffca66b93fc4cd..a5d1e2bddd58db8966a1a59b43d777e6f011db3c 100644 (file)
--- 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