From: Ilan Tayari <ilant@mellanox.com>
Date: Tue, 29 May 2018 16:39:04 -0700
Subject: net/mlx5: FPGA, Handle QP error event
Patch-mainline: v4.18-rc1
Git-commit: 98db16bab59fed3834cd0c0f4a3dbca57a61fad5
References: bsc#1103990 FATE#326006

Add handlers for this event to perform graceful teardown of the device.

Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Adi Nissim <adin@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c |   28 +++++++++++++++++---
 1 file changed, 24 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c
@@ -50,6 +50,11 @@ static const char *const mlx5_fpga_error
 	"Temperature Critical",
 };
 
+static const char * const mlx5_fpga_qp_error_strings[] = {
+	"Null Syndrome",
+	"Retry Counter Expired",
+	"RNR Expired",
+};
 static struct mlx5_fpga_device *mlx5_fpga_device_alloc(void)
 {
 	struct mlx5_fpga_device *fdev = NULL;
@@ -271,23 +276,38 @@ static const char *mlx5_fpga_syndrome_to
 	return "Unknown";
 }
 
+static const char *mlx5_fpga_qp_syndrome_to_string(u8 syndrome)
+{
+	if (syndrome < ARRAY_SIZE(mlx5_fpga_qp_error_strings))
+		return mlx5_fpga_qp_error_strings[syndrome];
+	return "Unknown";
+}
+
 void mlx5_fpga_event(struct mlx5_core_dev *mdev, u8 event, void *data)
 {
 	struct mlx5_fpga_device *fdev = mdev->fpga;
 	const char *event_name;
 	bool teardown = false;
 	unsigned long flags;
+	u32 fpga_qpn;
 	u8 syndrome;
 
-	if (event != MLX5_EVENT_TYPE_FPGA_ERROR) {
+	switch (event) {
+	case MLX5_EVENT_TYPE_FPGA_ERROR:
+		syndrome = MLX5_GET(fpga_error_event, data, syndrome);
+		event_name = mlx5_fpga_syndrome_to_string(syndrome);
+		break;
+	case MLX5_EVENT_TYPE_FPGA_QP_ERROR:
+		syndrome = MLX5_GET(fpga_qp_error_event, data, syndrome);
+		event_name = mlx5_fpga_qp_syndrome_to_string(syndrome);
+		fpga_qpn = MLX5_GET(fpga_qp_error_event, data, fpga_qpn);
+		break;
+	default:
 		mlx5_fpga_warn_ratelimited(fdev, "Unexpected event %u\n",
 					   event);
 		return;
 	}
 
-	syndrome = MLX5_GET(fpga_error_event, data, syndrome);
-	event_name = mlx5_fpga_syndrome_to_string(syndrome);
-
 	spin_lock_irqsave(&fdev->state_lock, flags);
 	switch (fdev->state) {
 	case MLX5_FPGA_STATUS_SUCCESS: