/**
* radeon_atpx_verify_interface - verify ATPX
*
* @atpx: radeon atpx struct
*
* Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
* to initialize ATPX and determine what features are supported
* (all asics).
* returns 0 on success, error on failure.
*/
static int radeon_atpx_verify_interface(struct radeon_atpx *atpx)
{
union acpi_object *info;
struct atpx_verify_interface output;
size_t size;
int err = 0;
info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
memset(&output, 0, sizeof(output));
size = *(u16 *) info->buffer.pointer;
if (size < 8) {
printk("ATPX buffer is too small: %zu\n", size);
err = -EINVAL;
goto out;
}
size = min(sizeof(output), size);
memcpy(&output, info->buffer.pointer, size);
/* TODO: check version? */
printk("ATPX version %u, functions 0x%08x\n",
output.version, output.function_bits);
radeon_atpx_parse_functions(&atpx->functions, output.function_bits);
out:
kfree(info);
return err;
}
/**
* radeon_atpx_verify_interface - verify ATPX
*
* @handle: acpi handle
* @atpx: radeon atpx struct
*
* Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
* to initialize ATPX and determine what features are supported
* (all asics).
* returns 0 on success, error on failure.
*/
static int radeon_atpx_verify_interface(struct radeon_atpx *atpx)
{
ACPI_OBJECT *info;
struct atpx_verify_interface output;
size_t size;
int err = 0;
info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
memset(&output, 0, sizeof(output));
size = *(u16 *) info->Buffer.Pointer;
if (size < 8) {
DRM_ERROR("ATPX buffer is too small: %zu\n", size);
err = -EINVAL;
goto out;
}
size = min(sizeof(output), size);
memcpy(&output, info->Buffer.Pointer, size);
/* TODO: check version? */
DRM_INFO("ATPX version %u\n", output.version);
radeon_atpx_parse_functions(&atpx->functions, output.function_bits);
out:
AcpiOsFree(info);
return err;
}
