From: Jiri Pirko <jiri@mellanox.com>
Date: Thu, 3 May 2018 14:59:42 +0300
Subject: mlxsw: pci: Check number of CQEs for CQE version 2
Patch-mainline: v4.18-rc1
Git-commit: 41107685b9ce3c204be4ba784c3dd6baf9e4bcf4
References: bsc#1112374

Check number of CQEs for CQE version 2 reported by QUERY_AQ_CAP command.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/cmd.h |    7 ++++++-
 drivers/net/ethernet/mellanox/mlxsw/pci.c |    4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/cmd.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/cmd.h
@@ -424,10 +424,15 @@ MLXSW_ITEM32(cmd_mbox, query_aq_cap, log
 MLXSW_ITEM32(cmd_mbox, query_aq_cap, max_num_rdqs, 0x04, 0, 8);
 
 /* cmd_mbox_query_aq_cap_log_max_cq_sz
- * Log (base 2) of max CQEs allowed on CQ.
+ * Log (base 2) of the Maximum CQEs allowed in a CQ for CQEv0 and CQEv1.
  */
 MLXSW_ITEM32(cmd_mbox, query_aq_cap, log_max_cq_sz, 0x08, 24, 8);
 
+/* cmd_mbox_query_aq_cap_log_max_cqv2_sz
+ * Log (base 2) of the Maximum CQEs allowed in a CQ for CQEv2.
+ */
+MLXSW_ITEM32(cmd_mbox, query_aq_cap, log_max_cqv2_sz, 0x08, 16, 8);
+
 /* cmd_mbox_query_aq_cap_max_num_cqs
  * Maximum number of CQs.
  */
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -959,6 +959,7 @@ static int mlxsw_pci_aqs_init(struct mlx
 	u8 rdq_log2sz;
 	u8 num_cqs;
 	u8 cq_log2sz;
+	u8 cqv2_log2sz;
 	u8 num_eqs;
 	u8 eq_log2sz;
 	int err;
@@ -974,6 +975,7 @@ static int mlxsw_pci_aqs_init(struct mlx
 	rdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_rdq_sz_get(mbox);
 	num_cqs = mlxsw_cmd_mbox_query_aq_cap_max_num_cqs_get(mbox);
 	cq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cq_sz_get(mbox);
+	cqv2_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cqv2_sz_get(mbox);
 	num_eqs = mlxsw_cmd_mbox_query_aq_cap_max_num_eqs_get(mbox);
 	eq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_eq_sz_get(mbox);
 
@@ -986,6 +988,8 @@ static int mlxsw_pci_aqs_init(struct mlx
 	if ((1 << sdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
 	    (1 << rdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
 	    (1 << cq_log2sz != MLXSW_PCI_CQE01_COUNT) ||
+	    (mlxsw_pci->max_cqe_ver == MLXSW_PCI_CQE_V2 &&
+	     (1 << cqv2_log2sz != MLXSW_PCI_CQE2_COUNT)) ||
 	    (1 << eq_log2sz != MLXSW_PCI_EQE_COUNT)) {
 		dev_err(&pdev->dev, "Unsupported number of async queue descriptors\n");
 		return -EINVAL;