diff options
| author | Matan Barak <matanb@mellanox.com> | 2014-11-13 15:45:33 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-13 23:16:22 +0300 |
| commit | de966c5928026b100a989c8cef761d306310a184 (patch) | |
| tree | 6a4651e46bf83c8b6c2404ca1e0890c23511b81b /drivers/net/ethernet/mellanox/mlx4/main.c | |
| parent | 7ae0e400cd9396c41fe596d35dcc34feaa89a04f (diff) | |
| download | linux-de966c5928026b100a989c8cef761d306310a184.tar.xz | |
net/mlx4_core: Support more than 64 VFs
We now allow up to 126 VFs. Note though that certain firmware
versions only allow up to 80 VFs. Moreover, old HCAs only support 64 VFs.
In these cases, we limit the maximum number of VFs to 64.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/main.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index ebb279060a25..3044f9e623cb 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -2373,6 +2373,24 @@ disable_sriov: return dev_flags & ~MLX4_FLAG_MASTER; } +enum { + MLX4_DEV_CAP_CHECK_NUM_VFS_ABOVE_64 = -1, +}; + +static int mlx4_check_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap, + int *nvfs) +{ + int requested_vfs = nvfs[0] + nvfs[1] + nvfs[2]; + /* Checking for 64 VFs as a limitation of CX2 */ + if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_80_VFS) && + requested_vfs >= 64) { + mlx4_err(dev, "Requested %d VFs, but FW does not support more than 64\n", + requested_vfs); + return MLX4_DEV_CAP_CHECK_NUM_VFS_ABOVE_64; + } + return 0; +} + static int mlx4_load_one(struct pci_dev *pdev, int pci_dev_data, int total_vfs, int *nvfs, struct mlx4_priv *priv) { @@ -2484,6 +2502,9 @@ slave_start: goto err_fw; } + if (mlx4_check_dev_cap(dev, dev_cap, nvfs)) + goto err_fw; + if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS)) { u64 dev_flags = mlx4_enable_sriov(dev, pdev, total_vfs, existing_vfs); @@ -2512,6 +2533,9 @@ slave_start: mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n"); goto err_fw; } + + if (mlx4_check_dev_cap(dev, dev_cap, nvfs)) + goto err_fw; } } |