[PATCH net-next 08/11] eth: bnxt: use the RSS context XArray instead of the local list

[Jakub Kicinski <kuba@kernel.org>]

Core already maintains all RSS contexts in an XArray, no need
to keep a second list in the driver.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 41 ++++++++++---------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h     |  2 -
 .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 11 +++--
 3 files changed, 26 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 39876feae1a4..6b8966d3ecb6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5970,17 +5970,20 @@ bnxt_cfg_rfs_ring_tbl_idx(struct bnxt *bp,
 			  struct hwrm_cfa_ntuple_filter_alloc_input *req,
 			  struct bnxt_ntuple_filter *fltr)
 {
-	struct bnxt_rss_ctx *rss_ctx, *tmp;
 	u16 rxq = fltr->base.rxq;
 
 	if (fltr->base.flags & BNXT_ACT_RSS_CTX) {
-		list_for_each_entry_safe(rss_ctx, tmp, &bp->rss_ctx_list, list) {
-			if (rss_ctx->index == fltr->base.fw_vnic_id) {
-				struct bnxt_vnic_info *vnic = &rss_ctx->vnic;
+		struct ethtool_rxfh_context *ctx;
+		struct bnxt_rss_ctx *rss_ctx;
+		struct bnxt_vnic_info *vnic;
 
-				req->dst_id = cpu_to_le16(vnic->fw_vnic_id);
-				break;
-			}
+		ctx = xa_load(&bp->dev->ethtool->rss_ctx,
+			      fltr->base.fw_vnic_id);
+		if (ctx) {
+			rss_ctx = ethtool_rxfh_context_priv(ctx);
+			vnic = &rss_ctx->vnic;
+
+			req->dst_id = cpu_to_le16(vnic->fw_vnic_id);
 		}
 		return;
 	}
@@ -10222,16 +10225,17 @@ void bnxt_del_one_rss_ctx(struct bnxt *bp, struct bnxt_rss_ctx *rss_ctx,
 				  vnic->rss_table,
 				  vnic->rss_table_dma_addr);
 	kfree(rss_ctx->rss_indir_tbl);
-	list_del(&rss_ctx->list);
 	bp->num_rss_ctx--;
 }
 
 static void bnxt_hwrm_realloc_rss_ctx_vnic(struct bnxt *bp)
 {
 	bool set_tpa = !!(bp->flags & BNXT_FLAG_TPA);
-	struct bnxt_rss_ctx *rss_ctx, *tmp;
+	struct ethtool_rxfh_context *ctx;
+	unsigned long context;
 
-	list_for_each_entry_safe(rss_ctx, tmp, &bp->rss_ctx_list, list) {
+	xa_for_each(&bp->dev->ethtool->rss_ctx, context, ctx) {
+		struct bnxt_rss_ctx *rss_ctx = ethtool_rxfh_context_priv(ctx);
 		struct bnxt_vnic_info *vnic = &rss_ctx->vnic;
 
 		if (bnxt_hwrm_vnic_alloc(bp, vnic, 0, bp->rx_nr_rings) ||
@@ -10247,16 +10251,14 @@ static void bnxt_hwrm_realloc_rss_ctx_vnic(struct bnxt *bp)
 
 void bnxt_clear_rss_ctxs(struct bnxt *bp)
 {
-	struct bnxt_rss_ctx *rss_ctx, *tmp;
+	struct ethtool_rxfh_context *ctx;
+	unsigned long context;
+
+	xa_for_each(&bp->dev->ethtool->rss_ctx, context, ctx) {
+		struct bnxt_rss_ctx *rss_ctx = ethtool_rxfh_context_priv(ctx);
 
-	list_for_each_entry_safe(rss_ctx, tmp, &bp->rss_ctx_list, list)
 		bnxt_del_one_rss_ctx(bp, rss_ctx, false);
-}
-
-static void bnxt_init_multi_rss_ctx(struct bnxt *bp)
-{
-	INIT_LIST_HEAD(&bp->rss_ctx_list);
-	bp->rss_cap |= BNXT_RSS_CAP_MULTI_RSS_CTX;
+	}
 }
 
 /* Allow PF, trusted VFs and VFs with default VLAN to be in promiscuous mode */
@@ -15840,8 +15842,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	INIT_LIST_HEAD(&bp->usr_fltr_list);
 
 	if (BNXT_SUPPORTS_NTUPLE_VNIC(bp))
-		bnxt_init_multi_rss_ctx(bp);
-
+		bp->rss_cap |= BNXT_RSS_CAP_MULTI_RSS_CTX;
 
 	rc = register_netdev(dev);
 	if (rc)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 21c3296cf6d9..be40e0513777 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1291,7 +1291,6 @@ struct bnxt_vnic_info {
 };
 
 struct bnxt_rss_ctx {
-	struct list_head list;
 	struct bnxt_vnic_info vnic;
 	u16	*rss_indir_tbl;
 	u8	index;
@@ -2330,7 +2329,6 @@ struct bnxt {
 	/* grp_info indexed by completion ring index */
 	struct bnxt_ring_grp_info	*grp_info;
 	struct bnxt_vnic_info	*vnic_info;
-	struct list_head	rss_ctx_list;
 	u32			num_rss_ctx;
 	int			nr_vnics;
 	u16			*rss_indir_tbl;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 2e6e060e2b44..74765583405b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1210,12 +1210,12 @@ static int bnxt_grxclsrule(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 static struct bnxt_rss_ctx *bnxt_get_rss_ctx_from_index(struct bnxt *bp,
 							u32 index)
 {
-	struct bnxt_rss_ctx *rss_ctx, *tmp;
+	struct ethtool_rxfh_context *ctx;
 
-	list_for_each_entry_safe(rss_ctx, tmp, &bp->rss_ctx_list, list)
-		if (rss_ctx->index == index)
-			return rss_ctx;
-	return NULL;
+	ctx = xa_load(&bp->dev->ethtool->rss_ctx, index);
+	if (!ctx)
+		return NULL;
+	return ethtool_rxfh_context_priv(ctx);
 }
 
 static int bnxt_alloc_rss_ctx_rss_table(struct bnxt *bp,
@@ -1903,7 +1903,6 @@ static int bnxt_create_rxfh_context(struct net_device *dev,
 
 	rss_ctx = ethtool_rxfh_context_priv(ctx);
 
-	list_add_tail(&rss_ctx->list, &bp->rss_ctx_list);
 	bp->num_rss_ctx++;
 
 	vnic = &rss_ctx->vnic;
-- 
2.45.2