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drm/i915: Rename some warts in the VMA API

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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
This commit is contained in:
Chris Wilson 2017-01-16 15:21:28 +00:00
parent be1e341513
commit 718659a630
7 changed files with 103 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/i915/i915_drv.h
View File

@ -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 */

2
drivers/gpu/drm/i915/i915_gem.c
View File

@ -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;

2
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -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);

45
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -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,

2
drivers/gpu/drm/i915/i915_gem_stolen.c
View File

@ -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;

90
drivers/gpu/drm/i915/i915_vma.c
View File

@ -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,
@ -153,11 +206,46 @@ 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

10
drivers/gpu/drm/i915/i915_vma.h
View File

@ -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)