Commit 4535cb9c authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarMarek Olšák <marek.olsak@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 353eec2a

drivers/gpu/drm/radeon/radeon_kms.c

+8 −0
Original line number Diff line number Diff line
@@ -568,6 +568,14 @@ 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;

include/uapi/drm/radeon_drm.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

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