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net/mlx5: Don't overwrite HCA capabilities when setting MSI-X count 

During driver probe of device that has dynamic MSI-X feature enabled,
the following error is printed in some FW flavour (not released yet).

 mlx5_core 0000:06:00.0: firmware version: 4.7.4387
 mlx5_core 0000:06:00.0: 126.016 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x16 link)
 mlx5_core 0000:06:00.0: mlx5_cmd_check:777:(pid 70599): SET_HCA_CAP(0x109) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x0)
 mlx5_core 0000:06:00.0: set_hca_cap:622:(pid 70599): handle_hca_cap failed
 mlx5_core 0000:06:00.0: mlx5_function_setup:1045:(pid 70599): set_hca_cap failed
 mlx5_core 0000:06:00.0: probe_one:1465:(pid 70599): mlx5_init_one failed with error code -22
 mlx5_core: probe of 0000:06:00.0 failed with error -22

In order to make the setting capability of MSI-X future proof, let's
query the current capabilities first.

Fixes: 604774add5 ("net/mlx5: Dynamically assign MSI-X vectors count")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Leon Romanovsky 2021-04-25 13:28:10 +03:00 committed by Saeed Mahameed
parent 7c9f131f36
commit 75e8564e91
1 changed files with 17 additions and 5 deletions
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22
drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
View File

@ -95,9 +95,10 @@ int mlx5_get_default_msix_vec_count(struct mlx5_core_dev *dev, int num_vfs)
int mlx5_set_msix_vec_count(struct mlx5_core_dev *dev, int function_id,
int msix_vec_count)
{
int sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
void *hca_cap = NULL, *query_cap = NULL, *cap;
int num_vf_msix, min_msix, max_msix;
void *hca_cap, *cap;
int ret;
num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);
@ -116,11 +117,20 @@ int mlx5_set_msix_vec_count(struct mlx5_core_dev *dev, int function_id,
if (msix_vec_count > max_msix)
return -EOVERFLOW;
hca_cap = kzalloc(sz, GFP_KERNEL);
if (!hca_cap)
return -ENOMEM;
query_cap = kzalloc(query_sz, GFP_KERNEL);
hca_cap = kzalloc(set_sz, GFP_KERNEL);
if (!hca_cap || !query_cap) {
ret = -ENOMEM;
goto out;
}
ret = mlx5_vport_get_other_func_cap(dev, function_id, query_cap);
if (ret)
goto out;
cap = MLX5_ADDR_OF(set_hca_cap_in, hca_cap, capability);
memcpy(cap, MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability),
MLX5_UN_SZ_BYTES(hca_cap_union));
MLX5_SET(cmd_hca_cap, cap, dynamic_msix_table_size, msix_vec_count);
MLX5_SET(set_hca_cap_in, hca_cap, opcode, MLX5_CMD_OP_SET_HCA_CAP);
@ -130,7 +140,9 @@ int mlx5_set_msix_vec_count(struct mlx5_core_dev *dev, int function_id,
MLX5_SET(set_hca_cap_in, hca_cap, op_mod,
MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1);
ret = mlx5_cmd_exec_in(dev, set_hca_cap, hca_cap);
out:
kfree(hca_cap);
kfree(query_cap);
return ret;
}