From: Michael Chan <michael.chan@broadcom.com>
Date: Mon, 4 May 2020 04:50:28 -0400
Subject: bnxt_en: Allocate TQM ring context memory according to fw
 specification.
Patch-mainline: v5.8-rc1
Git-commit: ac3158cb01084aa654222f1ad970b6c1af3cef98
References: jsc#SLE-15075

Newer firmware spec. will specify the number of TQM rings to allocate
context memory for.  Use the firmware specified value and fall back
to the old value derived from bp->max_q if it is not available.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |   30 +++++++++++++++++-------------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |    1 +
 2 files changed, 18 insertions(+), 13 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6432,23 +6432,13 @@ static int bnxt_hwrm_func_backing_store_
 	if (!rc) {
 		struct bnxt_ctx_pg_info *ctx_pg;
 		struct bnxt_ctx_mem_info *ctx;
-		int i;
+		int i, tqm_rings;
 
 		ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 		if (!ctx) {
 			rc = -ENOMEM;
 			goto ctx_err;
 		}
-		ctx_pg = kzalloc(sizeof(*ctx_pg) * (bp->max_q + 1), GFP_KERNEL);
-		if (!ctx_pg) {
-			kfree(ctx);
-			rc = -ENOMEM;
-			goto ctx_err;
-		}
-		for (i = 0; i < bp->max_q + 1; i++, ctx_pg++)
-			ctx->tqm_mem[i] = ctx_pg;
-
-		bp->ctx = ctx;
 		ctx->qp_max_entries = le32_to_cpu(resp->qp_max_entries);
 		ctx->qp_min_qp1_entries = le16_to_cpu(resp->qp_min_qp1_entries);
 		ctx->qp_max_l2_entries = le16_to_cpu(resp->qp_max_l2_entries);
@@ -6481,6 +6471,20 @@ static int bnxt_hwrm_func_backing_store_
 		ctx->tim_entry_size = le16_to_cpu(resp->tim_entry_size);
 		ctx->tim_max_entries = le32_to_cpu(resp->tim_max_entries);
 		ctx->ctx_kind_initializer = resp->ctx_kind_initializer;
+		ctx->tqm_fp_rings_count = resp->tqm_fp_rings_count;
+		if (!ctx->tqm_fp_rings_count)
+			ctx->tqm_fp_rings_count = bp->max_q;
+
+		tqm_rings = ctx->tqm_fp_rings_count + 1;
+		ctx_pg = kcalloc(tqm_rings, sizeof(*ctx_pg), GFP_KERNEL);
+		if (!ctx_pg) {
+			kfree(ctx);
+			rc = -ENOMEM;
+			goto ctx_err;
+		}
+		for (i = 0; i < tqm_rings; i++, ctx_pg++)
+			ctx->tqm_mem[i] = ctx_pg;
+		bp->ctx = ctx;
 	} else {
 		rc = 0;
 	}
@@ -6733,7 +6737,7 @@ static void bnxt_free_ctx_mem(struct bnx
 		return;
 
 	if (ctx->tqm_mem[0]) {
-		for (i = 0; i < bp->max_q + 1; i++)
+		for (i = 0; i < ctx->tqm_fp_rings_count + 1; i++)
 			bnxt_free_ctx_pg_tbls(bp, ctx->tqm_mem[i]);
 		kfree(ctx->tqm_mem[0]);
 		ctx->tqm_mem[0] = NULL;
@@ -6847,7 +6851,7 @@ skip_rdma:
 	entries = roundup(entries, ctx->tqm_entries_multiple);
 	entries = clamp_t(u32, entries, ctx->tqm_min_entries_per_ring,
 			  ctx->tqm_max_entries_per_ring);
-	for (i = 0; i < bp->max_q + 1; i++) {
+	for (i = 0; i < ctx->tqm_fp_rings_count + 1; i++) {
 		ctx_pg = ctx->tqm_mem[i];
 		ctx_pg->entries = entries;
 		mem_size = ctx->tqm_entry_size * entries;
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1349,6 +1349,7 @@ struct bnxt_ctx_mem_info {
 	u16	mrav_num_entries_units;
 	u8	tqm_entries_multiple;
 	u8	ctx_kind_initializer;
+	u8	tqm_fp_rings_count;
 
 	u32	flags;
 	#define BNXT_CTX_FLAG_INITED	0x01