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| author | Abhijit Gangurde <abhijit.gangurde@amd.com> | 2023-10-17 21:35:03 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-27 13:23:24 +0200 |
| commit | e3cfd49cb9491ac1cc233a4b9e098688b4ab281d (patch) | |
| tree | 15029eab27a1d6205226fa16d723222bb7363d84 /include/linux/cdx | |
| parent | ce558a391d80b9f47a462107977e8e81fe2f2962 (diff) | |
| download | linux-stable-e3cfd49cb9491ac1cc233a4b9e098688b4ab281d.tar.gz linux-stable-e3cfd49cb9491ac1cc233a4b9e098688b4ab281d.tar.bz2 linux-stable-e3cfd49cb9491ac1cc233a4b9e098688b4ab281d.zip | |
cdx: add support for bus enable and disable
CDX bus needs to be disabled before updating/writing devices
in the FPGA. Once the devices are written, the bus shall be
rescanned. This change provides sysfs entry to enable/disable the
CDX bus.
Co-developed-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Link: https://lore.kernel.org/r/20231017160505.10640-6-abhijit.gangurde@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/cdx')
| -rw-r--r-- | include/linux/cdx/cdx_bus.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/cdx/cdx_bus.h b/include/linux/cdx/cdx_bus.h index b5e4b7e05666..18e95076d1d5 100644 --- a/include/linux/cdx/cdx_bus.h +++ b/include/linux/cdx/cdx_bus.h @@ -28,6 +28,10 @@ struct cdx_device_config { u8 type; }; +typedef int (*cdx_bus_enable_cb)(struct cdx_controller *cdx, u8 bus_num); + +typedef int (*cdx_bus_disable_cb)(struct cdx_controller *cdx, u8 bus_num); + typedef int (*cdx_scan_cb)(struct cdx_controller *cdx); typedef int (*cdx_dev_configure_cb)(struct cdx_controller *cdx, @@ -49,11 +53,15 @@ typedef int (*cdx_dev_configure_cb)(struct cdx_controller *cdx, /** * struct cdx_ops - Callbacks supported by CDX controller. + * @bus_enable: enable bus on the controller + * @bus_disable: disable bus on the controller * @scan: scan the devices on the controller * @dev_configure: configuration like reset, master_enable, * msi_config etc for a CDX device */ struct cdx_ops { + cdx_bus_enable_cb bus_enable; + cdx_bus_disable_cb bus_disable; cdx_scan_cb scan; cdx_dev_configure_cb dev_configure; }; @@ -89,6 +97,7 @@ struct cdx_controller { * @flags: CDX device flags * @req_id: Requestor ID associated with CDX device * @is_bus: Is this bus device + * @enabled: is this bus enabled * @driver_override: driver name to force a match; do not set directly, * because core frees it; use driver_set_override() to * set or clear it. @@ -106,6 +115,7 @@ struct cdx_device { u16 flags; u32 req_id; bool is_bus; + bool enabled; const char *driver_override; }; |