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drm/i915: linuxify create_hw_context()

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Daniel complained about this on initial review, but he graciously moved
the patches forward. As promised, I am delivering the desired cleanup
now.

Hopefully I didn't screw the trivial patch up ;-)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2012-06-29 10:30:39 -07:00 committed by Daniel Vetter
parent e486fad913
commit 146937e582
1 changed files with 24 additions and 26 deletions
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50
drivers/gpu/drm/i915/i915_gem_context.c
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@ -136,37 +136,36 @@ static void do_destroy(struct i915_hw_context *ctx)
kfree(ctx); kfree(ctx);
} }
static int static struct i915_hw_context *
create_hw_context(struct drm_device *dev, create_hw_context(struct drm_device *dev,
struct drm_i915_file_private *file_priv, struct drm_i915_file_private *file_priv)
struct i915_hw_context **ctx_out)
{ {
struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_hw_context *ctx;
int ret, id; int ret, id;
*ctx_out = kzalloc(sizeof(struct drm_i915_file_private), GFP_KERNEL); ctx = kzalloc(sizeof(struct drm_i915_file_private), GFP_KERNEL);
if (*ctx_out == NULL) if (ctx == NULL)
return -ENOMEM; return ERR_PTR(-ENOMEM);
(*ctx_out)->obj = i915_gem_alloc_object(dev, ctx->obj = i915_gem_alloc_object(dev, dev_priv->hw_context_size);
dev_priv->hw_context_size); if (ctx->obj == NULL) {
if ((*ctx_out)->obj == NULL) { kfree(ctx);
kfree(*ctx_out);
DRM_DEBUG_DRIVER("Context object allocated failed\n"); DRM_DEBUG_DRIVER("Context object allocated failed\n");
return -ENOMEM; return ERR_PTR(-ENOMEM);
} }
/* The ring associated with the context object is handled by the normal /* The ring associated with the context object is handled by the normal
* object tracking code. We give an initial ring value simple to pass an * object tracking code. We give an initial ring value simple to pass an
* assertion in the context switch code. * assertion in the context switch code.
*/ */
(*ctx_out)->ring = &dev_priv->ring[RCS]; ctx->ring = &dev_priv->ring[RCS];
/* Default context will never have a file_priv */ /* Default context will never have a file_priv */
if (file_priv == NULL) if (file_priv == NULL)
return 0; return ctx;
(*ctx_out)->file_priv = file_priv; ctx->file_priv = file_priv;
again: again:
if (idr_pre_get(&file_priv->context_idr, GFP_KERNEL) == 0) { if (idr_pre_get(&file_priv->context_idr, GFP_KERNEL) == 0) {
@ -175,21 +174,21 @@ again:
goto err_out; goto err_out;
} }
ret = idr_get_new_above(&file_priv->context_idr, *ctx_out, ret = idr_get_new_above(&file_priv->context_idr, ctx,
DEFAULT_CONTEXT_ID + 1, &id); DEFAULT_CONTEXT_ID + 1, &id);
if (ret == 0) if (ret == 0)
(*ctx_out)->id = id; ctx->id = id;
if (ret == -EAGAIN) if (ret == -EAGAIN)
goto again; goto again;
else if (ret) else if (ret)
goto err_out; goto err_out;
return 0; return ctx;
err_out: err_out:
do_destroy(*ctx_out); do_destroy(ctx);
return ret; return ERR_PTR(ret);
} }
static inline bool is_default_context(struct i915_hw_context *ctx) static inline bool is_default_context(struct i915_hw_context *ctx)
@ -209,10 +208,9 @@ static int create_default_context(struct drm_i915_private *dev_priv)
BUG_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex)); BUG_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
ret = create_hw_context(dev_priv->dev, NULL, ctx = create_hw_context(dev_priv->dev, NULL);
&dev_priv->ring[RCS].default_context); if (IS_ERR(ctx))
if (ret) return PTR_ERR(ctx);
return ret;
/* We may need to do things with the shrinker which require us to /* We may need to do things with the shrinker which require us to
* immediately switch back to the default context. This can cause a * immediately switch back to the default context. This can cause a
@ -220,7 +218,7 @@ static int create_default_context(struct drm_i915_private *dev_priv)
* may not be available. To avoid this we always pin the * may not be available. To avoid this we always pin the
* default context. * default context.
*/ */
ctx = dev_priv->ring[RCS].default_context; dev_priv->ring[RCS].default_context = ctx;
ret = i915_gem_object_pin(ctx->obj, CONTEXT_ALIGN, false); ret = i915_gem_object_pin(ctx->obj, CONTEXT_ALIGN, false);
if (ret) { if (ret) {
do_destroy(ctx); do_destroy(ctx);
@ -496,13 +494,13 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
if (ret) if (ret)
return ret; return ret;
ret = create_hw_context(dev, file_priv, &ctx); ctx = create_hw_context(dev, file_priv);
mutex_unlock(&dev->struct_mutex); mutex_unlock(&dev->struct_mutex);
args->ctx_id = ctx->id; args->ctx_id = ctx->id;
DRM_DEBUG_DRIVER("HW context %d created\n", args->ctx_id); DRM_DEBUG_DRIVER("HW context %d created\n", args->ctx_id);
return ret; return PTR_RET(ctx);
} }
int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data, int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,