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Date: Fri, 1 Nov 2019 21:58:59 +0000
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Igor Leshchenko <igorle@...lanox.com>,
Meir Lichtinger <meirl@...lanox.com>,
Boris Pismenny <borisp@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 02/15] net/mlx5: FPGA, support network cards with
standalone FPGA
From: Igor Leshenko <igorle@...lanox.com>
Not all mlx5 cards with FPGA device use it for network processing.
mlx5_core driver configures network connection to FPGA device
for all mlx5 cards with installed FPGA. If FPGA is not a part of
network path, driver crashes in this case
Check FPGA name in function mlx5_fpga_device_start() and continue
integrate FPGA into packets flow only for dedicated cards.
Currently there are Newton and Edison cards.
Signed-off-by: Igor Leshenko <igorle@...lanox.com>
Reviewed-by: Meir Lichtinger <meirl@...lanox.com>
Reviewed-by: Boris Pismenny <borisp@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
.../ethernet/mellanox/mlx5/core/fpga/cmd.h | 10 +--
.../ethernet/mellanox/mlx5/core/fpga/core.c | 61 +++++++++++++------
2 files changed, 46 insertions(+), 25 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.h b/drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.h
index eb8b0fe0b4e1..11621d265d7e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.h
@@ -35,11 +35,11 @@
#include <linux/mlx5/driver.h>
-enum mlx5_fpga_device_id {
- MLX5_FPGA_DEVICE_UNKNOWN = 0,
- MLX5_FPGA_DEVICE_KU040 = 1,
- MLX5_FPGA_DEVICE_KU060 = 2,
- MLX5_FPGA_DEVICE_KU060_2 = 3,
+enum mlx5_fpga_id {
+ MLX5_FPGA_NEWTON = 0,
+ MLX5_FPGA_EDISON = 1,
+ MLX5_FPGA_MORSE = 2,
+ MLX5_FPGA_MORSEQ = 3,
};
enum mlx5_fpga_image {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c b/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c
index d046d1ec2a86..2ce4241459ce 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c
@@ -81,19 +81,28 @@ static const char *mlx5_fpga_image_name(enum mlx5_fpga_image image)
}
}
-static const char *mlx5_fpga_device_name(u32 device)
+static const char *mlx5_fpga_name(u32 fpga_id)
{
- switch (device) {
- case MLX5_FPGA_DEVICE_KU040:
- return "ku040";
- case MLX5_FPGA_DEVICE_KU060:
- return "ku060";
- case MLX5_FPGA_DEVICE_KU060_2:
- return "ku060_2";
- case MLX5_FPGA_DEVICE_UNKNOWN:
- default:
- return "unknown";
+ static char ret[32];
+
+ switch (fpga_id) {
+ case MLX5_FPGA_NEWTON:
+ return "Newton";
+ case MLX5_FPGA_EDISON:
+ return "Edison";
+ case MLX5_FPGA_MORSE:
+ return "Morse";
+ case MLX5_FPGA_MORSEQ:
+ return "MorseQ";
}
+
+ snprintf(ret, sizeof(ret), "Unknown %d", fpga_id);
+ return ret;
+}
+
+static int mlx5_is_fpga_lookaside(u32 fpga_id)
+{
+ return fpga_id != MLX5_FPGA_NEWTON && fpga_id != MLX5_FPGA_EDISON;
}
static int mlx5_fpga_device_load_check(struct mlx5_fpga_device *fdev)
@@ -110,8 +119,12 @@ static int mlx5_fpga_device_load_check(struct mlx5_fpga_device *fdev)
fdev->last_admin_image = query.admin_image;
fdev->last_oper_image = query.oper_image;
- mlx5_fpga_dbg(fdev, "Status %u; Admin image %u; Oper image %u\n",
- query.status, query.admin_image, query.oper_image);
+ mlx5_fpga_info(fdev, "Status %u; Admin image %u; Oper image %u\n",
+ query.status, query.admin_image, query.oper_image);
+
+ /* for FPGA lookaside projects FPGA load status is not important */
+ if (mlx5_is_fpga_lookaside(MLX5_CAP_FPGA(fdev->mdev, fpga_id)))
+ return 0;
if (query.status != MLX5_FPGA_STATUS_SUCCESS) {
mlx5_fpga_err(fdev, "%s image failed to load; status %u\n",
@@ -167,25 +180,30 @@ int mlx5_fpga_device_start(struct mlx5_core_dev *mdev)
struct mlx5_fpga_device *fdev = mdev->fpga;
unsigned int max_num_qps;
unsigned long flags;
- u32 fpga_device_id;
+ u32 fpga_id;
int err;
if (!fdev)
return 0;
- err = mlx5_fpga_device_load_check(fdev);
+ err = mlx5_fpga_caps(fdev->mdev);
if (err)
goto out;
- err = mlx5_fpga_caps(fdev->mdev);
+ err = mlx5_fpga_device_load_check(fdev);
if (err)
goto out;
- fpga_device_id = MLX5_CAP_FPGA(fdev->mdev, fpga_device);
- mlx5_fpga_info(fdev, "%s:%u; %s image, version %u; SBU %06x:%04x version %d\n",
- mlx5_fpga_device_name(fpga_device_id),
- fpga_device_id,
+ fpga_id = MLX5_CAP_FPGA(fdev->mdev, fpga_id);
+ mlx5_fpga_info(fdev, "FPGA card %s:%u\n", mlx5_fpga_name(fpga_id), fpga_id);
+
+ /* No QPs if FPGA does not participate in net processing */
+ if (mlx5_is_fpga_lookaside(fpga_id))
+ goto out;
+
+ mlx5_fpga_info(fdev, "%s(%d): image, version %u; SBU %06x:%04x version %d\n",
mlx5_fpga_image_name(fdev->last_oper_image),
+ fdev->last_oper_image,
MLX5_CAP_FPGA(fdev->mdev, image_version),
MLX5_CAP_FPGA(fdev->mdev, ieee_vendor_id),
MLX5_CAP_FPGA(fdev->mdev, sandbox_product_id),
@@ -264,6 +282,9 @@ void mlx5_fpga_device_stop(struct mlx5_core_dev *mdev)
if (!fdev)
return;
+ if (mlx5_is_fpga_lookaside(MLX5_CAP_FPGA(fdev->mdev, fpga_id)))
+ return;
+
spin_lock_irqsave(&fdev->state_lock, flags);
if (fdev->state != MLX5_FPGA_STATUS_SUCCESS) {
spin_unlock_irqrestore(&fdev->state_lock, flags);
--
2.21.0
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