diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_context.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_context.c | 39 |
1 files changed, 23 insertions, 16 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 403309c2a7d..9af3fe7e42b 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -73,7 +73,7 @@ * * There are two confusing terms used above: * The "current context" means the context which is currently running on the - * GPU. The GPU has loaded it's state already and has stored away the gtt + * GPU. The GPU has loaded its state already and has stored away the gtt * offset of the BO. The GPU is not actively referencing the data at this * offset, but it will on the next context switch. The only way to avoid this * is to do a GPU reset. @@ -129,6 +129,7 @@ void i915_gem_context_free(struct kref *ctx_ref) struct i915_hw_context *ctx = container_of(ctx_ref, typeof(*ctx), ref); + list_del(&ctx->link); drm_gem_object_unreference(&ctx->obj->base); kfree(ctx); } @@ -147,6 +148,7 @@ create_hw_context(struct drm_device *dev, kref_init(&ctx->ref); ctx->obj = i915_gem_alloc_object(dev, dev_priv->hw_context_size); + INIT_LIST_HEAD(&ctx->link); if (ctx->obj == NULL) { kfree(ctx); DRM_DEBUG_DRIVER("Context object allocated failed\n"); @@ -166,6 +168,7 @@ create_hw_context(struct drm_device *dev, * assertion in the context switch code. */ ctx->ring = &dev_priv->ring[RCS]; + list_add_tail(&ctx->link, &dev_priv->context_list); /* Default context will never have a file_priv */ if (file_priv == NULL) @@ -178,6 +181,10 @@ create_hw_context(struct drm_device *dev, ctx->file_priv = file_priv; ctx->id = ret; + /* NB: Mark all slices as needing a remap so that when the context first + * loads it will restore whatever remap state already exists. If there + * is no remap info, it will be a NOP. */ + ctx->remap_slice = (1 << NUM_L3_SLICES(dev)) - 1; return ctx; @@ -393,11 +400,11 @@ static int do_switch(struct i915_hw_context *to) struct intel_ring_buffer *ring = to->ring; struct i915_hw_context *from = ring->last_context; u32 hw_flags = 0; - int ret; + int ret, i; BUG_ON(from != NULL && from->obj != NULL && from->obj->pin_count == 0); - if (from == to) + if (from == to && !to->remap_slice) return 0; ret = i915_gem_obj_ggtt_pin(to->obj, CONTEXT_ALIGN, false, false); @@ -420,8 +427,6 @@ static int do_switch(struct i915_hw_context *to) if (!to->is_initialized || is_default_context(to)) hw_flags |= MI_RESTORE_INHIBIT; - else if (WARN_ON_ONCE(from == to)) /* not yet expected */ - hw_flags |= MI_FORCE_RESTORE; ret = mi_set_context(ring, to, hw_flags); if (ret) { @@ -429,6 +434,18 @@ static int do_switch(struct i915_hw_context *to) return ret; } + for (i = 0; i < MAX_L3_SLICES; i++) { + if (!(to->remap_slice & (1<<i))) + continue; + + ret = i915_gem_l3_remap(ring, i); + /* If it failed, try again next round */ + if (ret) + DRM_DEBUG_DRIVER("L3 remapping failed\n"); + else + to->remap_slice &= ~(1<<i); + } + /* The backing object for the context is done after switching to the * *next* context. Therefore we cannot retire the previous context until * the next context has already started running. In fact, the below code @@ -451,17 +468,7 @@ static int do_switch(struct i915_hw_context *to) from->obj->dirty = 1; BUG_ON(from->obj->ring != ring); - ret = i915_add_request(ring, NULL); - if (ret) { - /* Too late, we've already scheduled a context switch. - * Try to undo the change so that the hw state is - * consistent with out tracking. In case of emergency, - * scream. - */ - WARN_ON(mi_set_context(ring, from, MI_RESTORE_INHIBIT)); - return ret; - } - + /* obj is kept alive until the next request by its active ref */ i915_gem_object_unpin(from->obj); i915_gem_context_unreference(from); } |