From c6aab9161a0343e63f44043cf22b6d67a3250143 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 24 May 2016 14:53:38 +0100 Subject: [PATCH] drm/i915: Move pinning of dev_priv->kernel_context into its creator Rather than have every context ask "am I owned by the kernel? pin!", move that logic into the creator of the kernel context, in order to improve code comprehension. v2: Throw away the user_handle on failure to allocate the ppgtt. Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Joonas Lahtinen Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/1464098023-3294-5-git-send-email-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_context.c | 53 +++++++++++-------------- 1 file changed, 24 insertions(+), 29 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index a3f9adb22a73..104d4819aca8 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -303,9 +303,7 @@ static struct i915_gem_context * i915_gem_create_context(struct drm_device *dev, struct drm_i915_file_private *file_priv) { - const bool is_global_default_ctx = file_priv == NULL; struct i915_gem_context *ctx; - int ret = 0; lockdep_assert_held(&dev->struct_mutex); @@ -313,30 +311,15 @@ i915_gem_create_context(struct drm_device *dev, if (IS_ERR(ctx)) return ctx; - if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state) { - /* We may need to do things with the shrinker which - * require us to immediately switch back to the default - * context. This can cause a problem as pinning the - * default context also requires GTT space which may not - * be available. To avoid this we always pin the default - * context. - */ - ret = i915_gem_obj_ggtt_pin(ctx->legacy_hw_ctx.rcs_state, - get_context_alignment(to_i915(dev)), 0); - if (ret) { - DRM_DEBUG_DRIVER("Couldn't pin %d\n", ret); - goto err_destroy; - } - } - if (USES_FULL_PPGTT(dev)) { struct i915_hw_ppgtt *ppgtt = i915_ppgtt_create(dev, file_priv); - if (IS_ERR_OR_NULL(ppgtt)) { + if (IS_ERR(ppgtt)) { DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n", PTR_ERR(ppgtt)); - ret = PTR_ERR(ppgtt); - goto err_unpin; + idr_remove(&file_priv->context_idr, ctx->user_handle); + i915_gem_context_unreference(ctx); + return ERR_CAST(ppgtt); } ctx->ppgtt = ppgtt; @@ -345,14 +328,6 @@ i915_gem_create_context(struct drm_device *dev, trace_i915_context_create(ctx); return ctx; - -err_unpin: - if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state) - i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state); -err_destroy: - idr_remove(&file_priv->context_idr, ctx->user_handle); - i915_gem_context_unreference(ctx); - return ERR_PTR(ret); } static void i915_gem_context_unpin(struct i915_gem_context *ctx, @@ -426,6 +401,26 @@ int i915_gem_context_init(struct drm_device *dev) return PTR_ERR(ctx); } + if (ctx->legacy_hw_ctx.rcs_state) { + int ret; + + /* We may need to do things with the shrinker which + * require us to immediately switch back to the default + * context. This can cause a problem as pinning the + * default context also requires GTT space which may not + * be available. To avoid this we always pin the default + * context. + */ + ret = i915_gem_obj_ggtt_pin(ctx->legacy_hw_ctx.rcs_state, + get_context_alignment(dev_priv), 0); + if (ret) { + DRM_ERROR("Failed to pinned default global context (error %d)\n", + ret); + i915_gem_context_unreference(ctx); + return ret; + } + } + dev_priv->kernel_context = ctx; DRM_DEBUG_DRIVER("%s context support initialized\n", -- 2.39.5