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.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/radeon/radeon_kms.c | 8 ++++++++
include/uapi/drm/radeon_drm.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c
b/drivers/gpu/drm/radeon/radeon_kms.c
index f15de68..86a0cb2 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -561,6 +561,14 @@ static int radeon_info_ioctl(struct drm_device *dev, void
*data, struct drm_file
else
*value = rdev->pm.current_mclk / 100;
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:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;
diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index de7ee21..871e73f 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -1037,6 +1037,7 @@ struct drm_radeon_cs {
#define RADEON_INFO_CURRENT_GPU_TEMP 0x21
#define RADEON_INFO_CURRENT_GPU_SCLK 0x22
#define RADEON_INFO_CURRENT_GPU_MCLK 0x23
+#define RADEON_INFO_READ_REG 0x24
struct drm_radeon_info {
uint32_t request;
--
1.8.3.1
