diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2014-10-01 11:26:50 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-03-19 12:26:42 -0400 |
| commit | 4535cb9cefbc736b47bc1e7f8628065aba5ca0d7 (patch) | |
| tree | 61ac646bcce16d863c023e05510200e735036ec7 /drivers/gpu/drm/radeon/radeon_kms.c | |
| parent | 353eec2ab229867d59a12375a48fc65e2d749e8b (diff) | |
| download | linux-4535cb9cefbc736b47bc1e7f8628065aba5ca0d7.tar.gz | |
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>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_kms.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_kms.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index cf7e54e9b0d1..7b2a7335cc5d 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -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; |