netdev - [net-next v2 PATCH] octeontx2-af: cn10k: Increase outstanding LMTST transactions

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Date: Tue, 5 Dec 2023 11:22:41 +0530
From: Geetha sowjanya <gakula@...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>,
        <jerinj@...vell.com>, <gakula@...vell.com>, <sbhatta@...vell.com>,
        <hkelam@...vell.com>
Subject: [net-next v2 PATCH] octeontx2-af: cn10k: Increase outstanding LMTST transactions

From: Pavan Nikhilesh <pbhagavatula@...vell.com>

Currently the number of outstanding store transactions issued by AP as
a part of LMTST operation is set to 1 i.e default value.
This patch set to max supported value to increase the performance.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@...vell.com>
Signed-off-by: Geetha sowjanya <gakula@...vell.com>
---
v1-v2:
 used FIELD_PREP marco.


 drivers/net/ethernet/marvell/octeontx2/af/rvu.c       | 3 +++
 drivers/net/ethernet/marvell/octeontx2/af/rvu.h       | 1 +
 drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c | 9 +++++++++
 drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h   | 2 ++
 4 files changed, 15 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index 22c395c7d040..14bb91b98f97 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -935,6 +935,9 @@ static int rvu_setup_hw_resources(struct rvu *rvu)
 	hw->total_vfs = (cfg >> 20) & 0xFFF;
 	hw->max_vfs_per_pf = (cfg >> 40) & 0xFF;
 
+	if (!is_rvu_otx2(rvu))
+		rvu_apr_block_cn10k_init(rvu);
+
 	/* Init NPA LF's bitmap */
 	block = &hw->block[BLKADDR_NPA];
 	if (!block->implemented)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index c4d999ef5ab4..6546cc489d7e 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -940,6 +940,7 @@ void rvu_nix_block_cn10k_init(struct rvu *rvu, struct nix_hw *nix_hw);
 
 /* CN10K RVU - LMT*/
 void rvu_reset_lmt_map_tbl(struct rvu *rvu, u16 pcifunc);
+void rvu_apr_block_cn10k_init(struct rvu *rvu);
 
 #ifdef CONFIG_DEBUG_FS
 void rvu_dbg_init(struct rvu *rvu);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c
index 0e74c5a2231e..7fa98aeb3663 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c
@@ -559,3 +559,12 @@ void rvu_nix_block_cn10k_init(struct rvu *rvu, struct nix_hw *nix_hw)
 	cfg |= BIT_ULL(1) | BIT_ULL(2);
 	rvu_write64(rvu, blkaddr, NIX_AF_CFG, cfg);
 }
+
+void rvu_apr_block_cn10k_init(struct rvu *rvu)
+{
+	u64 reg;
+
+	reg = rvu_read64(rvu, BLKADDR_APR, APR_AF_LMT_CFG);
+	reg |=	FIELD_PREP(LMTST_THROTTLE_MASK, LMTST_WR_PEND_MAX);
+	rvu_write64(rvu, BLKADDR_APR, APR_AF_LMT_CFG, reg);
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
index b42e631e52d0..189f0eafd5ff 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
@@ -733,5 +733,7 @@
 #define APR_LMT_MAP_ENT_DIS_SCH_CMP_SHIFT	23
 #define APR_LMT_MAP_ENT_SCH_ENA_SHIFT		22
 #define APR_LMT_MAP_ENT_DIS_LINE_PREF_SHIFT	21
+#define LMTST_THROTTLE_MASK		GENMASK_ULL(38, 35)
+#define LMTST_WR_PEND_MAX		15
 
 #endif /* RVU_REG_H */
-- 
2.25.1