On Tue, Mar 20, 2012 at 1:30 PM, Tom Stellard <tstellar@xxxxxxxxx> wrote:
> The maximum number of pipes is needed by the user space compute
> driver to calculate the number of wavefronts per thread group.
>
> Signed-off-by: Tom Stellard <thomas.stellard@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon_drv.c | 3 ++-
> drivers/gpu/drm/radeon/radeon_kms.c | 13 +++++++++++++
> include/drm/radeon_drm.h | 2 ++
> 3 files changed, 17 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index 498d21d..ef7bb3f 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -56,9 +56,10 @@
> * 2.12.0 - RADEON_CS_KEEP_TILING_FLAGS
> * 2.13.0 - virtual memory support, streamout
> * 2.14.0 - add evergreen tiling informations
> + * 2.15.0 - add max_pipes query
> */
> #define KMS_DRIVER_MAJOR 2
> -#define KMS_DRIVER_MINOR 14
> +#define KMS_DRIVER_MINOR 15
> #define KMS_DRIVER_PATCHLEVEL 0
> int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
> int radeon_driver_unload_kms(struct drm_device *dev);
> diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
> index 1986eba..72d70eb 100644
> --- a/drivers/gpu/drm/radeon/radeon_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_kms.c
> @@ -264,6 +264,19 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
> return -EINVAL;
> value = RADEON_IB_VM_MAX_SIZE;
> break;
> + case RADEON_INFO_MAX_PIPES:
> + if (rdev->family >= CHIP_CAYMAN)
> + value = rdev->config.cayman.max_pipes_per_simd;
> + else if (rdev->family >= CHIP_CEDAR)
> + value = rdev->config.evergreen.max_pipes;
> + else if (rdev->family >= CHIP_RV770)
> + value = rdev->config.rv770.max_pipes;
> + else if (rdev->family >= CHIP_R600)
> + value = rdev->config.r600.max_pipes;
> + else {
> + return -EINVAL;
> + }
> + break;
> default:
> DRM_DEBUG_KMS("Invalid request %d\n", info->request);
> return -EINVAL;
> diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
> index cb2f0c3..6cde931 100644
> --- a/include/drm/radeon_drm.h
> +++ b/include/drm/radeon_drm.h
> @@ -962,6 +962,8 @@ struct drm_radeon_cs {
> #define RADEON_INFO_VA_START 0x0e
> /* maximum size of ib using the virtual memory cs */
> #define RADEON_INFO_IB_VM_MAX_SIZE 0x0f
> +/* max pipes - needed for compute shaders */
> +#define RADEON_INFO_MAX_PIPES 0x10
>
> struct drm_radeon_info {
> uint32_t request;
> --
> 1.7.7.6
>
> _______________________________________________
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> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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