[PATCH] drm/radeon: add cayman VM support for append packet.

[Alex Deucher]

On Thu, Apr 21, 2016 at 8:06 PM, Dave Airlie <airlied at gmail.com> wrote:
> From: Dave Airlie <airlied at redhat.com>
>
> This adds support for SET_APPEND_CNT packet3 to the VM paths.
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/radeon/evergreen_cs.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
> index 18ddd75..0d3f744 100644
> --- a/drivers/gpu/drm/radeon/evergreen_cs.c
> +++ b/drivers/gpu/drm/radeon/evergreen_cs.c
> @@ -3483,6 +3483,27 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev,
>                         }
>                 }
>                 break;
> +       case PACKET3_SET_APPEND_CNT: {
> +               uint32_t areg;
> +               uint32_t allowed_reg_base;
> +
> +               if (pkt->count != 2) {
> +                       DRM_ERROR("bad SET_APPEND_CNT (invalid count)\n");
> +                       return -EINVAL;
> +               }
> +
> +               allowed_reg_base = GDS_APPEND_COUNT_0;
> +               allowed_reg_base -= PACKET3_SET_CONTEXT_REG_START;
> +               allowed_reg_base >>= 2;
> +
> +               areg = idx_value >> 16;
> +               if (areg < allowed_reg_base || areg > (allowed_reg_base + 11)) {
> +                       DRM_ERROR("forbidden register for append cnt 0x%08x at %d\n",
> +                                 areg, idx);
> +                       return -EINVAL;
> +               }
> +               break;
> +       }
>         default:
>                 return -EINVAL;
>         }
> --
> 2.1.0
>
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