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| author | Nipun Gupta <nipun.gupta@amd.com> | 2023-03-13 18:56:36 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-29 12:26:32 +0200 |
| commit | 48a6c7bced2a781c911497f073347bec5ab4d7a5 (patch) | |
| tree | 953e725238c48da61dceebf4d652ea52fdb8db38 /drivers/cdx/controller | |
| parent | 2a226927d9b836ddec674aebbcea311727d04240 (diff) | |
| download | linux-stable-48a6c7bced2a781c911497f073347bec5ab4d7a5.tar.gz linux-stable-48a6c7bced2a781c911497f073347bec5ab4d7a5.tar.bz2 linux-stable-48a6c7bced2a781c911497f073347bec5ab4d7a5.zip | |
cdx: add device attributes
Create sysfs entry for CDX devices.
Sysfs entries provided in each of the CDX device detected by
the CDX controller
- vendor id
- device id
- remove
- reset of the device.
- driver override
Signed-off-by: Puneet Gupta <puneet.gupta@amd.com>
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Tarak Reddy <tarak.reddy@amd.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/r/20230313132636.31850-8-nipun.gupta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/cdx/controller')
| -rw-r--r-- | drivers/cdx/controller/cdx_controller.c | 18 | ||||
| -rw-r--r-- | drivers/cdx/controller/mcdi_functions.c | 14 | ||||
| -rw-r--r-- | drivers/cdx/controller/mcdi_functions.h | 11 |
3 files changed, 43 insertions, 0 deletions
diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c index 0d1826980935..dc52f95f8978 100644 --- a/drivers/cdx/controller/cdx_controller.c +++ b/drivers/cdx/controller/cdx_controller.c @@ -45,6 +45,23 @@ void cdx_rpmsg_pre_remove(struct cdx_controller *cdx) cdx_mcdi_wait_for_quiescence(cdx->priv, MCDI_RPC_TIMEOUT); } +static int cdx_configure_device(struct cdx_controller *cdx, + u8 bus_num, u8 dev_num, + struct cdx_device_config *dev_config) +{ + int ret = 0; + + switch (dev_config->type) { + case CDX_DEV_RESET_CONF: + ret = cdx_mcdi_reset_device(cdx->priv, bus_num, dev_num); + break; + default: + ret = -EINVAL; + } + + return ret; +} + static int cdx_scan_devices(struct cdx_controller *cdx) { struct cdx_mcdi *cdx_mcdi = cdx->priv; @@ -104,6 +121,7 @@ static int cdx_scan_devices(struct cdx_controller *cdx) static struct cdx_ops cdx_ops = { .scan = cdx_scan_devices, + .dev_configure = cdx_configure_device, }; static int xlnx_cdx_probe(struct platform_device *pdev) diff --git a/drivers/cdx/controller/mcdi_functions.c b/drivers/cdx/controller/mcdi_functions.c index 012b52881dd5..0158f26533dd 100644 --- a/drivers/cdx/controller/mcdi_functions.c +++ b/drivers/cdx/controller/mcdi_functions.c @@ -123,3 +123,17 @@ int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx, return 0; } + +int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN); + int ret; + + MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num); + MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num); + + ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf), + NULL, 0, NULL); + + return ret; +} diff --git a/drivers/cdx/controller/mcdi_functions.h b/drivers/cdx/controller/mcdi_functions.h index 6bf5a4a0778f..7440ace5539a 100644 --- a/drivers/cdx/controller/mcdi_functions.h +++ b/drivers/cdx/controller/mcdi_functions.h @@ -47,4 +47,15 @@ int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num, struct cdx_dev_params *dev_params); +/** + * cdx_mcdi_reset_device - Reset cdx device represented by bus_num:dev_num + * @cdx: pointer to MCDI interface. + * @bus_num: Bus number. + * @dev_num: Device number. + * + * Return: 0 on success, <0 on failure + */ +int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, + u8 bus_num, u8 dev_num); + #endif /* CDX_MCDI_FUNCTIONS_H */ |