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authorChris Wilson <chris@chris-wilson.co.uk>2017-01-16 15:21:28 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2017-01-19 10:15:26 +0000
commit718659a63054261d052cd94f2f9502111ff5173f (patch)
tree905327dcc07eb6575164567a33b42f73af09b641 /drivers
parentbe1e341513ca23b0668b7b0f26fa6e2ffc46ba20 (diff)
downloadblackbird-op-linux-718659a63054261d052cd94f2f9502111ff5173f.tar.gz
blackbird-op-linux-718659a63054261d052cd94f2f9502111ff5173f.zip
drm/i915: Rename some warts in the VMA API
Whilst writing testcases to exercise the VMA API, some oddities came to light, such as i915_gem_obj_lookup_or_create(). Joonas suggested i915_vma_instance() as a neat replacement, so rename them, move them to i915_vma.c and add some kerneldoc as a sugary bonus. s/i915_gem_obj_to_vma/i915_vma_lookup/ s/i915_gem_obj_lookup_or_create_vma/i915_vma_instance/ Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170116152131.18089-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h12
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c2
-rw-r--r--drivers/gpu/drm/i915/i915_gem_execbuffer.c2
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c45
-rw-r--r--drivers/gpu/drm/i915/i915_gem_stolen.c2
-rw-r--r--drivers/gpu/drm/i915/i915_vma.c90
-rw-r--r--drivers/gpu/drm/i915/i915_vma.h10
7 files changed, 103 insertions, 60 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b67f419ffba6..566adcc8a0eb 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3374,16 +3374,6 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *gem_obj, int flags);
-struct i915_vma *
-i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view);
-
-struct i915_vma *
-i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view);
-
static inline struct i915_hw_ppgtt *
i915_vm_to_ppgtt(struct i915_address_space *vm)
{
@@ -3394,7 +3384,7 @@ static inline struct i915_vma *
i915_gem_object_to_ggtt(struct drm_i915_gem_object *obj,
const struct i915_ggtt_view *view)
{
- return i915_gem_obj_to_vma(obj, &to_i915(obj->base.dev)->ggtt.base, view);
+ return i915_vma_lookup(obj, &to_i915(obj->base.dev)->ggtt.base, view);
}
/* i915_gem_fence_reg.c */
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d6ec63997ca3..b2f8ac1386a2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3679,7 +3679,7 @@ i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
lockdep_assert_held(&obj->base.dev->struct_mutex);
- vma = i915_gem_obj_lookup_or_create_vma(obj, vm, view);
+ vma = i915_vma_instance(obj, vm, view);
if (IS_ERR(vma))
return vma;
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 259fe4aa8d41..c66e90571031 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -184,7 +184,7 @@ eb_lookup_vmas(struct eb_vmas *eb,
* from the (obj, vm) we don't run the risk of creating
* duplicated vmas for the same vm.
*/
- vma = i915_gem_obj_lookup_or_create_vma(obj, vm, NULL);
+ vma = i915_vma_instance(obj, vm, NULL);
if (unlikely(IS_ERR(vma))) {
DRM_DEBUG("Failed to lookup VMA\n");
ret = PTR_ERR(vma);
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 64f241bffc80..e808aad203d8 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3362,51 +3362,6 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
i915_ggtt_invalidate(dev_priv);
}
-struct i915_vma *
-i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view)
-{
- struct rb_node *rb;
-
- rb = obj->vma_tree.rb_node;
- while (rb) {
- struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
- long cmp;
-
- cmp = i915_vma_compare(vma, vm, view);
- if (cmp == 0)
- return vma;
-
- if (cmp < 0)
- rb = rb->rb_right;
- else
- rb = rb->rb_left;
- }
-
- return NULL;
-}
-
-struct i915_vma *
-i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
- struct i915_address_space *vm,
- const struct i915_ggtt_view *view)
-{
- struct i915_vma *vma;
-
- lockdep_assert_held(&obj->base.dev->struct_mutex);
- GEM_BUG_ON(view && !i915_is_ggtt(vm));
-
- vma = i915_gem_obj_to_vma(obj, vm, view);
- if (!vma) {
- vma = i915_vma_create(obj, vm, view);
- GEM_BUG_ON(vma != i915_gem_obj_to_vma(obj, vm, view));
- }
-
- GEM_BUG_ON(i915_vma_is_closed(vma));
- return vma;
-}
-
static struct scatterlist *
rotate_pages(const dma_addr_t *in, unsigned int offset,
unsigned int width, unsigned int height,
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 52dbb9bab268..61cc0fcae3d8 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -683,7 +683,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv
if (ret)
goto err;
- vma = i915_gem_obj_lookup_or_create_vma(obj, &ggtt->base, NULL);
+ vma = i915_vma_instance(obj, &ggtt->base, NULL);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto err_pages;
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index fe93ed1e012f..87273b0137ec 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -146,6 +146,59 @@ __i915_vma_create(struct drm_i915_gem_object *obj,
return vma;
}
+/**
+ * i915_vma_lookup - finds a matching VMA
+ * @obj: parent &struct drm_i915_gem_object to be mapped
+ * @vm: address space in which the mapping is located
+ * @view: additional mapping requirements
+ *
+ * i915_vma_lookup() looks up an existing VMA of the @obj in the @vm with
+ * the same @view characteristics.
+ *
+ * Must be called with struct_mutex held.
+ *
+ * Returns the vma if found, or NULL.
+ */
+struct i915_vma *
+i915_vma_lookup(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view)
+{
+ struct rb_node *rb;
+
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+
+ rb = obj->vma_tree.rb_node;
+ while (rb) {
+ struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
+ long cmp;
+
+ cmp = i915_vma_compare(vma, vm, view);
+ if (cmp == 0)
+ return vma;
+
+ if (cmp < 0)
+ rb = rb->rb_right;
+ else
+ rb = rb->rb_left;
+ }
+
+ return NULL;
+}
+
+/**
+ * i915_vma_create - creates a VMA
+ * @obj: parent &struct drm_i915_gem_object to be mapped
+ * @vm: address space in which the mapping is located
+ * @view: additional mapping requirements
+ *
+ * i915_vma_create() allocates a new VMA of the @obj in the @vm with
+ * @view characteristics.
+ *
+ * Must be called with struct_mutex held.
+ *
+ * Returns the vma if found, or an error pointer.
+ */
struct i915_vma *
i915_vma_create(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
@@ -153,12 +206,47 @@ i915_vma_create(struct drm_i915_gem_object *obj,
{
lockdep_assert_held(&obj->base.dev->struct_mutex);
GEM_BUG_ON(view && !i915_is_ggtt(vm));
- GEM_BUG_ON(i915_gem_obj_to_vma(obj, vm, view));
+ GEM_BUG_ON(i915_vma_lookup(obj, vm, view));
return __i915_vma_create(obj, vm, view);
}
/**
+ * i915_vma_instance - return the singleton instance of the VMA
+ * @obj: parent &struct drm_i915_gem_object to be mapped
+ * @vm: address space in which the mapping is located
+ * @view: additional mapping requirements
+ *
+ * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with
+ * the same @view characteristics. If a match is not found, one is created.
+ * Once created, the VMA is kept until either the object is freed, or the
+ * address space is closed.
+ *
+ * Must be called with struct_mutex held.
+ *
+ * Returns the vma, or an error pointer.
+ */
+struct i915_vma *
+i915_vma_instance(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view)
+{
+ struct i915_vma *vma;
+
+ lockdep_assert_held(&obj->base.dev->struct_mutex);
+ GEM_BUG_ON(view && !i915_is_ggtt(vm));
+ GEM_BUG_ON(vm->closed);
+
+ vma = i915_vma_lookup(obj, vm, view);
+ if (!vma)
+ vma = i915_vma_create(obj, vm, view);
+
+ GEM_BUG_ON(!IS_ERR(vma) && i915_vma_is_closed(vma));
+ GEM_BUG_ON(!IS_ERR(vma) && i915_vma_lookup(obj, vm, view) != vma);
+ return vma;
+}
+
+/**
* i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
* @vma: VMA to map
* @cache_level: mapping cache level
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 86b60fb4e954..b3c81190b4a0 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -116,6 +116,16 @@ i915_vma_create(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
const struct i915_ggtt_view *view);
+struct i915_vma *
+i915_vma_lookup(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view);
+
+struct i915_vma *
+i915_vma_instance(struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm,
+ const struct i915_ggtt_view *view);
+
void i915_vma_unpin_and_release(struct i915_vma **p_vma);
static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
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