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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-28 09:56:51 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-28 12:17:32 +0100 |
| commit | 5d1808ecbc370ce6a083947f8866c8e857671914 (patch) | |
| tree | a126fde5d6f0266ec212e7b6b32b882333bbdfa3 /drivers/gpu/drm/i915/i915_drv.h | |
| parent | ef87bba8280442bfbd07df5e409df85b023b39c2 (diff) | |
| download | lwn-5d1808ecbc370ce6a083947f8866c8e857671914.tar.gz lwn-5d1808ecbc370ce6a083947f8866c8e857671914.zip | |
drm/i915: Assign every HW context a unique ID
The hardware tracks contexts and expects all live contexts (those active
on the hardware) to have a unique identifier. This is used by the
hardware to assign pagefaults and the like to a particular context.
v2: Reorder to make sure ctx->link is not left dangling if the
assignment of a hw_id fails (Mika).
v3: We have 21bits of context space, not 20.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-17-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 831da9f43324..0f7575252c6e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -851,6 +851,9 @@ struct intel_context { struct i915_ctx_hang_stats hang_stats; struct i915_hw_ppgtt *ppgtt; + /* Unique identifier for this context, used by the hw for tracking */ + unsigned hw_id; + /* Legacy ring buffer submission */ struct { struct drm_i915_gem_object *rcs_state; @@ -1838,6 +1841,13 @@ struct drm_i915_private { DECLARE_HASHTABLE(mm_structs, 7); struct mutex mm_lock; + /* The hw wants to have a stable context identifier for the lifetime + * of the context (for OA, PASID, faults, etc). This is limited + * in execlists to 21 bits. + */ + struct ida context_hw_ida; +#define MAX_CONTEXT_HW_ID (1<<21) /* exclusive */ + /* Kernel Modesetting */ struct drm_crtc *plane_to_crtc_mapping[I915_MAX_PIPES]; |