From: Michael Chan <michael.chan@broadcom.com>
Date: Sun, 14 Oct 2018 07:02:53 -0400
Subject: bnxt_en: Increase RSS context array count and skip ring groups on
 57500 chips.
Patch-mainline: v4.20-rc1
Git-commit: 44c6f72a4c30496c7378a62e13605b217e49f991
References: bsc#1104745 FATE#325918

On the new 57500 chips, we need to allocate one RSS context for every
64 RX rings.  In previous chips, only one RSS context per vnic is
required regardless of the number of RX rings.  So increase the max
RSS context array count to 8.

Hardware ring groups are not used on the new chips.  Note that the
software ring group structure is still maintained in the driver to
keep track of the rings associated with the vnic.

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 |    2 +-
 2 files changed, 22 insertions(+), 10 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2881,10 +2881,12 @@ static void bnxt_init_vnics(struct bnxt
 
 	for (i = 0; i < bp->nr_vnics; i++) {
 		struct bnxt_vnic_info *vnic = &bp->vnic_info[i];
+		int j;
 
 		vnic->fw_vnic_id = INVALID_HW_RING_ID;
-		vnic->fw_rss_cos_lb_ctx[0] = INVALID_HW_RING_ID;
-		vnic->fw_rss_cos_lb_ctx[1] = INVALID_HW_RING_ID;
+		for (j = 0; j < BNXT_MAX_CTX_PER_VNIC; j++)
+			vnic->fw_rss_cos_lb_ctx[j] = INVALID_HW_RING_ID;
+
 		vnic->fw_l2_ctx_id = INVALID_HW_RING_ID;
 
 		if (bp->vnic_info[i].rss_hash_key) {
@@ -3098,6 +3100,9 @@ static int bnxt_alloc_vnic_attributes(st
 			}
 		}
 
+		if (bp->flags & BNXT_FLAG_CHIP_P5)
+			goto vnic_skip_grps;
+
 		if (vnic->flags & BNXT_VNIC_RSS_FLAG)
 			max_rings = bp->rx_nr_rings;
 		else
@@ -3108,7 +3113,7 @@ static int bnxt_alloc_vnic_attributes(st
 			rc = -ENOMEM;
 			goto out;
 		}
-
+vnic_skip_grps:
 		if ((bp->flags & BNXT_FLAG_NEW_RSS_CAP) &&
 		    !(vnic->flags & BNXT_VNIC_RSS_FLAG))
 			continue;
@@ -4397,6 +4402,10 @@ static int bnxt_hwrm_vnic_alloc(struct b
 	unsigned int i, j, grp_idx, end_idx = start_rx_ring_idx + nr_rings;
 	struct hwrm_vnic_alloc_input req = {0};
 	struct hwrm_vnic_alloc_output *resp = bp->hwrm_cmd_resp_addr;
+	struct bnxt_vnic_info *vnic = &bp->vnic_info[vnic_id];
+
+	if (bp->flags & BNXT_FLAG_CHIP_P5)
+		goto vnic_no_ring_grps;
 
 	/* map ring groups to this vnic */
 	for (i = start_rx_ring_idx, j = 0; i < end_idx; i++, j++) {
@@ -4406,12 +4415,12 @@ static int bnxt_hwrm_vnic_alloc(struct b
 				   j, nr_rings);
 			break;
 		}
-		bp->vnic_info[vnic_id].fw_grp_ids[j] =
-					bp->grp_info[grp_idx].fw_grp_id;
+		vnic->fw_grp_ids[j] = bp->grp_info[grp_idx].fw_grp_id;
 	}
 
-	bp->vnic_info[vnic_id].fw_rss_cos_lb_ctx[0] = INVALID_HW_RING_ID;
-	bp->vnic_info[vnic_id].fw_rss_cos_lb_ctx[1] = INVALID_HW_RING_ID;
+vnic_no_ring_grps:
+	for (i = 0; i < BNXT_MAX_CTX_PER_VNIC; i++)
+		vnic->fw_rss_cos_lb_ctx[i] = INVALID_HW_RING_ID;
 	if (vnic_id == 0)
 		req.flags = cpu_to_le32(VNIC_ALLOC_REQ_FLAGS_DEFAULT);
 
@@ -4420,7 +4429,7 @@ static int bnxt_hwrm_vnic_alloc(struct b
 	mutex_lock(&bp->hwrm_cmd_lock);
 	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 	if (!rc)
-		bp->vnic_info[vnic_id].fw_vnic_id = le32_to_cpu(resp->vnic_id);
+		vnic->fw_vnic_id = le32_to_cpu(resp->vnic_id);
 	mutex_unlock(&bp->hwrm_cmd_lock);
 	return rc;
 }
@@ -4456,6 +4465,9 @@ static int bnxt_hwrm_ring_grp_alloc(stru
 	u16 i;
 	u32 rc = 0;
 
+	if (bp->flags & BNXT_FLAG_CHIP_P5)
+		return 0;
+
 	mutex_lock(&bp->hwrm_cmd_lock);
 	for (i = 0; i < bp->rx_nr_rings; i++) {
 		struct hwrm_ring_grp_alloc_input req = {0};
@@ -4488,7 +4500,7 @@ static int bnxt_hwrm_ring_grp_free(struc
 	u32 rc = 0;
 	struct hwrm_ring_grp_free_input req = {0};
 
-	if (!bp->grp_info)
+	if (!bp->grp_info || (bp->flags & BNXT_FLAG_CHIP_P5))
 		return 0;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_RING_GRP_FREE, -1, -1);
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -862,7 +862,7 @@ struct bnxt_ring_grp_info {
 
 struct bnxt_vnic_info {
 	u16		fw_vnic_id; /* returned by Chimp during alloc */
-#define BNXT_MAX_CTX_PER_VNIC	2
+#define BNXT_MAX_CTX_PER_VNIC	8
 	u16		fw_rss_cos_lb_ctx[BNXT_MAX_CTX_PER_VNIC];
 	u16		fw_l2_ctx_id;
 #define BNXT_MAX_UC_ADDRS	4