[PATCH] drm/radeon: add support for MEM_WRITE packet

[Alex Deucher]

On Wed, Dec 19, 2012 at 12:26 PM,  <j.glisse at gmail.com> wrote:
> From: Jerome Glisse <jglisse at redhat.com>
>
> To make it easier to debug some lockup from userspace add support
> to MEM_WRITE packet.
>
> Signed-off-by: Jerome Glisse <jglisse at redhat.com>

Looks good to me.  Added to my fixes queue.

Alex

> ---
>  drivers/gpu/drm/radeon/evergreen_cs.c | 29 +++++++++++++++++++++++++++++
>  drivers/gpu/drm/radeon/r600_cs.c      | 29 +++++++++++++++++++++++++++++
>  drivers/gpu/drm/radeon/radeon_drv.c   |  3 ++-
>  3 files changed, 60 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
> index 74c6b42..5cea852 100644
> --- a/drivers/gpu/drm/radeon/evergreen_cs.c
> +++ b/drivers/gpu/drm/radeon/evergreen_cs.c
> @@ -2654,6 +2654,35 @@ static int evergreen_packet3_check(struct radeon_cs_parser *p,
>                         ib[idx+4] = upper_32_bits(offset) & 0xff;
>                 }
>                 break;
> +       case PACKET3_MEM_WRITE:
> +       {
> +               u64 offset;
> +
> +               if (pkt->count != 3) {
> +                       DRM_ERROR("bad MEM_WRITE (invalid count)\n");
> +                       return -EINVAL;
> +               }
> +               r = evergreen_cs_packet_next_reloc(p, &reloc);
> +               if (r) {
> +                       DRM_ERROR("bad MEM_WRITE (missing reloc)\n");
> +                       return -EINVAL;
> +               }
> +               offset = radeon_get_ib_value(p, idx+0);
> +               offset += ((u64)(radeon_get_ib_value(p, idx+1) & 0xff)) << 32UL;
> +               if (offset & 0x7) {
> +                       DRM_ERROR("bad MEM_WRITE (address not qwords aligned)\n");
> +                       return -EINVAL;
> +               }
> +               if ((offset + 8) > radeon_bo_size(reloc->robj)) {
> +                       DRM_ERROR("bad MEM_WRITE bo too small: 0x%llx, 0x%lx\n",
> +                                 offset + 8, radeon_bo_size(reloc->robj));
> +                       return -EINVAL;
> +               }
> +               offset += reloc->lobj.gpu_offset;
> +               ib[idx+0] = offset;
> +               ib[idx+1] = upper_32_bits(offset) & 0xff;
> +               break;
> +       }
>         case PACKET3_COPY_DW:
>                 if (pkt->count != 4) {
>                         DRM_ERROR("bad COPY_DW (invalid count)\n");
> diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
> index 0be768b..9ea13d0 100644
> --- a/drivers/gpu/drm/radeon/r600_cs.c
> +++ b/drivers/gpu/drm/radeon/r600_cs.c
> @@ -2294,6 +2294,35 @@ static int r600_packet3_check(struct radeon_cs_parser *p,
>                         ib[idx+4] = upper_32_bits(offset) & 0xff;
>                 }
>                 break;
> +       case PACKET3_MEM_WRITE:
> +       {
> +               u64 offset;
> +
> +               if (pkt->count != 3) {
> +                       DRM_ERROR("bad MEM_WRITE (invalid count)\n");
> +                       return -EINVAL;
> +               }
> +               r = r600_cs_packet_next_reloc(p, &reloc);
> +               if (r) {
> +                       DRM_ERROR("bad MEM_WRITE (missing reloc)\n");
> +                       return -EINVAL;
> +               }
> +               offset = radeon_get_ib_value(p, idx+0);
> +               offset += ((u64)(radeon_get_ib_value(p, idx+1) & 0xff)) << 32UL;
> +               if (offset & 0x7) {
> +                       DRM_ERROR("bad MEM_WRITE (address not qwords aligned)\n");
> +                       return -EINVAL;
> +               }
> +               if ((offset + 8) > radeon_bo_size(reloc->robj)) {
> +                       DRM_ERROR("bad MEM_WRITE bo too small: 0x%llx, 0x%lx\n",
> +                                 offset + 8, radeon_bo_size(reloc->robj));
> +                       return -EINVAL;
> +               }
> +               offset += reloc->lobj.gpu_offset;
> +               ib[idx+0] = offset;
> +               ib[idx+1] = upper_32_bits(offset) & 0xff;
> +               break;
> +       }
>         case PACKET3_COPY_DW:
>                 if (pkt->count != 4) {
>                         DRM_ERROR("bad COPY_DW (invalid count)\n");
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index 9b1a727..ff75934 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -68,9 +68,10 @@
>   *   2.25.0 - eg+: new info request for num SE and num SH
>   *   2.26.0 - r600-eg: fix htile size computation
>   *   2.27.0 - r600-SI: Add CS ioctl support for async DMA
> + *   2.28.0 - r600-eg: Add MEM_WRITE packet support
>   */
>  #define KMS_DRIVER_MAJOR       2
> -#define KMS_DRIVER_MINOR       27
> +#define KMS_DRIVER_MINOR       28
>  #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);
> --
> 1.7.11.7
>
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