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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-10 17:26:33 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-10 20:23:10 +0300 |
| commit | d2b4b97933f5adacfba42dc3b9200d0e21fbe2c4 (patch) | |
| tree | ed930479bbd2f36b2f28997fc4f2ccb2f37824e3 /drivers/gpu/drm/i915/i915_gem_context.h | |
| parent | f4e15af7e21861445821d5f09922ef7e695269a1 (diff) | |
| download | linux-d2b4b97933f5adacfba42dc3b9200d0e21fbe2c4.tar.xz | |
drm/i915: Record the default hw state after reset upon load
Take a copy of the HW state after a reset upon module loading by
executing a context switch from a blank context to the kernel context,
thus saving the default hw state over the blank context image.
We can then use the default hw state to initialise any future context,
ensuring that each starts with the default view of hw state.
v2: Unmap our default state from the GTT after stealing it from the
context. This should stop us from accidentally overwriting it via the
GTT (and frees up some precious GTT space).
Testcase: igt/gem_ctx_isolation
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110142634.10551-7-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_context.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_context.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h index 44688e22a5c2..4bfb72f8e1cb 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.h +++ b/drivers/gpu/drm/i915/i915_gem_context.h @@ -157,7 +157,6 @@ struct i915_gem_context { u32 *lrc_reg_state; u64 lrc_desc; int pin_count; - bool initialised; } engine[I915_NUM_ENGINES]; /** ring_size: size for allocating the per-engine ring buffer */ @@ -292,6 +291,9 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data, int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data, struct drm_file *file); +struct i915_gem_context * +i915_gem_context_create_kernel(struct drm_i915_private *i915, int prio); + static inline struct i915_gem_context * i915_gem_context_get(struct i915_gem_context *ctx) { |