netdev - [PATCH net-next 05/11] bnxt_en: Improve bnxt_backing_store_cfg

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Message-ID: <20250915030505.1803478-6-michael.chan@broadcom.com>
Date: Sun, 14 Sep 2025 20:04:59 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	Shruti Parab <shruti.parab@...adcom.com>,
	Hongguang Gao <hongguang.gao@...adcom.com>
Subject: [PATCH net-next 05/11] bnxt_en: Improve bnxt_backing_store_cfg_v2()

Improve the logic that determines the last_type in this function.
The different context memory types are configured in a loop.  The
last_type signals the last context memory type to be configured
which requires the ALL_DONE flag to be set for the FW.

The existing logic makes some assumptions that TIM is the last_type
when RDMA is enabled or FTQM is the last_type when only L2 is
enabled.  Improve it to just search for the last_type so that we
don't need to make these assumptions that won't necessary be true
for future devices.

Reviewed-by: Shruti Parab <shruti.parab@...adcom.com>
Reviewed-by: Hongguang Gao <hongguang.gao@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 38a2884f7c78..09cc58288e67 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9150,7 +9150,7 @@ static int bnxt_hwrm_func_backing_store_cfg_v2(struct bnxt *bp,
 	return rc;
 }
 
-static int bnxt_backing_store_cfg_v2(struct bnxt *bp, u32 ena)
+static int bnxt_backing_store_cfg_v2(struct bnxt *bp)
 {
 	struct bnxt_ctx_mem_info *ctx = bp->ctx;
 	struct bnxt_ctx_mem_type *ctxm;
@@ -9176,12 +9176,13 @@ static int bnxt_backing_store_cfg_v2(struct bnxt *bp, u32 ena)
 	}
 
 	if (last_type == BNXT_CTX_INV) {
-		if (!ena)
+		for (type = 0; type < BNXT_CTX_MAX; type++) {
+			ctxm = &ctx->ctx_arr[type];
+			if (ctxm->mem_valid)
+				last_type = type;
+		}
+		if (last_type == BNXT_CTX_INV)
 			return 0;
-		else if (ena & FUNC_BACKING_STORE_CFG_REQ_ENABLES_TIM)
-			last_type = BNXT_CTX_MAX - 1;
-		else
-			last_type = BNXT_CTX_L2_MAX - 1;
 	}
 	ctx->ctx_arr[last_type].last = 1;
 
@@ -9411,7 +9412,7 @@ static int bnxt_alloc_ctx_mem(struct bnxt *bp)
 	ena |= FUNC_BACKING_STORE_CFG_REQ_DFLT_ENABLES;
 
 	if (bp->fw_cap & BNXT_FW_CAP_BACKING_STORE_V2)
-		rc = bnxt_backing_store_cfg_v2(bp, ena);
+		rc = bnxt_backing_store_cfg_v2(bp);
 	else
 		rc = bnxt_hwrm_func_backing_store_cfg(bp, ena);
 	if (rc) {
-- 
2.51.0