diff options
| author | Alex Vesker | 2018-06-28 14:05:58 +0200 |
|---|---|---|
| committer | Saeed Mahameed | 2019-06-13 22:23:17 +0200 |
| commit | b25bbc2f24dcab9cd186ef4003c39bf51ad0454c (patch) | |
| tree | 52c2fce61d25929e74c966605147f88a8e23d3e1 /drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h | |
| parent | net/mlx5: Move all devlink related functions calls to devlink.c (diff) | |
| download | kernel-qcow2-linux-b25bbc2f24dcab9cd186ef4003c39bf51ad0454c.tar.gz kernel-qcow2-linux-b25bbc2f24dcab9cd186ef4003c39bf51ad0454c.tar.xz kernel-qcow2-linux-b25bbc2f24dcab9cd186ef4003c39bf51ad0454c.zip | |
net/mlx5: Add Vendor Specific Capability access gateway
The Vendor Specific Capability (VSC) is used to activate a gateway
interfacing with the device. The gateway is used to read or write
device configurations, which are organized in different domains (spaces).
A configuration access may result in multiple actions, reads, writes.
Example usages are accessing the Crspace domain to read the crspace or
locking a device semaphore using the Semaphore domain.
The configuration access use pci_cfg_access to prevent parallel access to
the VSC space by the driver and userspace calls.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h new file mode 100644 index 000000000000..28ea6bfa439f --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* Copyright (c) 2019 Mellanox Technologies */ + +#ifndef __MLX5_PCI_VSC_H__ +#define __MLX5_PCI_VSC_H__ + +enum { + MLX5_VSC_SPACE_SCAN_CRSPACE = 0x7, +}; + +void mlx5_pci_vsc_init(struct mlx5_core_dev *dev); +int mlx5_vsc_gw_lock(struct mlx5_core_dev *dev); +int mlx5_vsc_gw_unlock(struct mlx5_core_dev *dev); +int mlx5_vsc_gw_set_space(struct mlx5_core_dev *dev, u16 space, + u32 *ret_space_size); +int mlx5_vsc_gw_read_block_fast(struct mlx5_core_dev *dev, u32 *data, + int length); + +static inline bool mlx5_vsc_accessible(struct mlx5_core_dev *dev) +{ + return !!dev->vsc_addr; +} + +#endif /* __MLX5_PCI_VSC_H__ */ |