On Thu, Mar 14, 2013 at 05:52:17PM +0200, Mika Kuoppala wrote:
> This ioctl returns context reset status for specified context.
>
> Signed-off-by: Mika Kuoppala <mika.kuopp...@intel.com>
> CC: i...@freedesktop.org
> ---
> drivers/gpu/drm/i915/i915_dma.c | 1 +
> drivers/gpu/drm/i915/i915_drv.c | 61
> +++++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/i915_drv.h | 2 ++
> include/uapi/drm/i915_drm.h | 28 ++++++++++++++++++
> 4 files changed, 92 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 7902d97..c919832 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1903,6 +1903,7 @@ struct drm_ioctl_desc i915_ioctls[] = {
> DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE,
> i915_gem_context_create_ioctl, DRM_UNLOCKED),
> DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY,
> i915_gem_context_destroy_ioctl, DRM_UNLOCKED),
> DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED),
> + DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATUS,
> i915_gem_context_get_reset_status_ioctl, DRM_UNLOCKED),
> };
>
> int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 69c9856..a4d06f2 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -1267,3 +1267,64 @@ int i915_reg_read_ioctl(struct drm_device *dev,
>
> return 0;
> }
> +
> +int i915_gem_context_get_reset_status_ioctl(struct drm_device *dev,
> + void *data, struct drm_file *file)
> +{
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_ring_buffer *ring;
> + struct drm_i915_reset_status *args = data;
> + struct ctx_reset_state *rs = NULL;
> + unsigned long reset_cnt;
> + u32 reset_status = I915_RESET_UNKNOWN;
> + int ret;
> +
> + ret = mutex_lock_interruptible(&dev->struct_mutex);
> + if (ret)
> + return ret;
> +
> + ring = &dev_priv->ring[RCS];
> +
> + ret = i915_gem_context_get_reset_state(ring,
> + file,
> + args->ctx_id,
> + &rs);
> + if (ret)
> + goto out;
See earlier comments.
> + BUG_ON(!rs);
> +
> + reset_cnt = atomic_read(&dev_priv->gpu_error.reset_counter);
> +
> + if (reset_cnt & I915_RESET_IN_PROGRESS_FLAG ||
> + reset_cnt == I915_WEDGED) {
> + goto out;
I915_WEDGED & I915_RESET_IN_PROGRESS_FLAGS is defined as true.
> + }
> +
> + /* Set guilty/innocent status if only one reset was
> + * observed and if only one guilty was found
> + */
> + if ((rs->reset_cnt + 2) == reset_cnt &&
> + (rs->guilty_cnt + 1) == dev_priv->gpu_error.guilty_cnt) {
> + reset_status = 0;
> +
> + if (rs->guilty)
> + reset_status |= I915_RESET_BATCH_ACTIVE;
> +
> + if (rs->innocent)
> + reset_status |= I915_RESET_BATCH_PENDING;
> +
> + if (reset_status == 0)
> + reset_status = I915_RESET_UNKNOWN;
> + } else if (rs->reset_cnt == reset_cnt) {
> + reset_status = I915_RESET_NO_ERROR;
> + }
This looks very fragile and time dependent. It is not an interface I can
use...
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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