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drm/radeon: add support for read reg query from radeon info ioctl 

This allows us to query certain registers from userspace
for profiling and harvest configuration.  E.g., it can
be used by the GALLIUM_HUD for profiling the status of
various gfx blocks.

Tested-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-10-01 11:26:50 -04:00
parent 353eec2ab2
commit 4535cb9cef
2 changed files with 9 additions and 0 deletions
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8
drivers/gpu/drm/radeon/radeon_kms.c
View File

@ -568,6 +568,14 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
else else
*value = rdev->pm.current_mclk / 100; *value = rdev->pm.current_mclk / 100;
break; break;
case RADEON_INFO_READ_REG:
if (copy_from_user(value, value_ptr, sizeof(uint32_t))) {
DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__);
return -EFAULT;
}
if (radeon_get_allowed_info_register(rdev, *value, value))
return -EINVAL;
break;
default: default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request); DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL; return -EINVAL;

1
include/uapi/drm/radeon_drm.h
View File

@ -1037,6 +1037,7 @@ struct drm_radeon_cs {
#define RADEON_INFO_CURRENT_GPU_TEMP 0x21 #define RADEON_INFO_CURRENT_GPU_TEMP 0x21
#define RADEON_INFO_CURRENT_GPU_SCLK 0x22 #define RADEON_INFO_CURRENT_GPU_SCLK 0x22
#define RADEON_INFO_CURRENT_GPU_MCLK 0x23 #define RADEON_INFO_CURRENT_GPU_MCLK 0x23
#define RADEON_INFO_READ_REG 0x24
struct drm_radeon_info { struct drm_radeon_info {
uint32_t request; uint32_t request;