From: Michael Chan <michael.chan@broadcom.com>
Date: Sun, 5 Aug 2018 16:51:50 -0400
Subject: bnxt_en: Add new VF resource allocation strategy mode.
Patch-mainline: v4.19-rc1
Git-commit: bf82736da3c376c03a42c74ea6fa971e89740d7a
References: bsc#1104745 FATE#325918

The new mode is "minimal-static" to be used when resources are more
limited to support a large number of VFs, for example  The PF driver
will provision guaranteed minimum resources of 0.  Each VF has no
guranteed resources until it tries to reserve resources during device
open.

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       |    2 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt.h       |    1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c |   23 ++++++++++++++---------
 3 files changed, 16 insertions(+), 10 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5162,7 +5162,7 @@ int bnxt_hwrm_func_resc_qcaps(struct bnx
 
 		pf->vf_resv_strategy =
 			le16_to_cpu(resp->vf_reservation_strategy);
-		if (pf->vf_resv_strategy > BNXT_VF_RESV_STRATEGY_MINIMAL)
+		if (pf->vf_resv_strategy > BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC)
 			pf->vf_resv_strategy = BNXT_VF_RESV_STRATEGY_MAXIMAL;
 	}
 hwrm_func_resc_qcaps_exit:
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -862,6 +862,7 @@ struct bnxt_pf_info {
 	u8	vf_resv_strategy;
 #define BNXT_VF_RESV_STRATEGY_MAXIMAL	0
 #define BNXT_VF_RESV_STRATEGY_MINIMAL	1
+#define BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC	2
 	void			*hwrm_cmd_req_addr[4];
 	dma_addr_t		hwrm_cmd_req_dma_addr[4];
 	struct bnxt_vf_info	*vf;
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -447,7 +447,7 @@ static int bnxt_hwrm_func_vf_resc_cfg(st
 	u16 vf_tx_rings, vf_rx_rings, vf_cp_rings;
 	u16 vf_stat_ctx, vf_vnics, vf_ring_grps;
 	struct bnxt_pf_info *pf = &bp->pf;
-	int i, rc = 0;
+	int i, rc = 0, min = 1;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_RESOURCE_CFG, -1, -1);
 
@@ -464,14 +464,19 @@ static int bnxt_hwrm_func_vf_resc_cfg(st
 
 	req.min_rsscos_ctx = cpu_to_le16(BNXT_VF_MIN_RSS_CTX);
 	req.max_rsscos_ctx = cpu_to_le16(BNXT_VF_MAX_RSS_CTX);
-	if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL) {
-		req.min_cmpl_rings = cpu_to_le16(1);
-		req.min_tx_rings = cpu_to_le16(1);
-		req.min_rx_rings = cpu_to_le16(1);
-		req.min_l2_ctxs = cpu_to_le16(BNXT_VF_MIN_L2_CTX);
-		req.min_vnics = cpu_to_le16(1);
-		req.min_stat_ctx = cpu_to_le16(1);
-		req.min_hw_ring_grps = cpu_to_le16(1);
+	if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC) {
+		min = 0;
+		req.min_rsscos_ctx = cpu_to_le16(min);
+	}
+	if (pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL ||
+	    pf->vf_resv_strategy == BNXT_VF_RESV_STRATEGY_MINIMAL_STATIC) {
+		req.min_cmpl_rings = cpu_to_le16(min);
+		req.min_tx_rings = cpu_to_le16(min);
+		req.min_rx_rings = cpu_to_le16(min);
+		req.min_l2_ctxs = cpu_to_le16(min);
+		req.min_vnics = cpu_to_le16(min);
+		req.min_stat_ctx = cpu_to_le16(min);
+		req.min_hw_ring_grps = cpu_to_le16(min);
 	} else {
 		vf_cp_rings /= num_vfs;
 		vf_tx_rings /= num_vfs;