In order to specialise functions depending upon the type of object, we
can attach vfuncs to each object via their obj->driver_private pointer,
bringing it back to life!
For instance, this will be used in future patches to only bind pages from
a dma-buf for the duration that the object is used by the GPU - and so
prevent them from pinning those pages for the entire of the object.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 10 ++++-
drivers/gpu/drm/i915/i915_gem.c | 65 ++++++++++++++++++++++----------
drivers/gpu/drm/i915/i915_gem_dmabuf.c | 4 +-
3 files changed, 56 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index bbc51ef..c42190b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -895,6 +895,11 @@ enum i915_cache_level {
I915_CACHE_LLC_MLC, /* gen6+, in docs at least! */
};
+struct drm_i915_gem_object_ops {
+ int (*get_pages)(struct drm_i915_gem_object *);
+ void (*put_pages)(struct drm_i915_gem_object *);
+};
+
struct drm_i915_gem_object {
struct drm_gem_object base;
@@ -1302,7 +1307,8 @@ int i915_gem_wait_ioctl(struct drm_device *dev, void
*data,
struct drm_file *file_priv);
void i915_gem_load(struct drm_device *dev);
int i915_gem_init_object(struct drm_gem_object *obj);
-void i915_gem_object_init(struct drm_i915_gem_object *obj);
+void i915_gem_object_init(struct drm_i915_gem_object *obj,
+ const struct drm_i915_gem_object_ops *ops);
struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
size_t size);
void i915_gem_free_object(struct drm_gem_object *obj);
@@ -1315,7 +1321,7 @@ int __must_check i915_gem_object_unbind(struct
drm_i915_gem_object *obj);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
void i915_gem_lastclose(struct drm_device *dev);
-int __must_check i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj);
+int __must_check i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
int __must_check i915_mutex_lock_interruptible(struct drm_device *dev);
int i915_gem_object_sync(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *to);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 9c8787e..ed6a1ec 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1407,15 +1407,12 @@ i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj)
return obj->madv == I915_MADV_DONTNEED;
}
-static int
+static void
i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
{
int page_count = obj->base.size / PAGE_SIZE;
int ret, i;
- if (obj->pages == NULL)
- return 0;
-
BUG_ON(obj->gtt_space);
BUG_ON(obj->madv == __I915_MADV_PURGED);
@@ -1448,9 +1445,19 @@ i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj)
drm_free_large(obj->pages);
obj->pages = NULL;
+}
- list_del(&obj->gtt_list);
+static int
+i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
+{
+ const struct drm_i915_gem_object_ops *ops = obj->base.driver_private;
+ if (obj->sg_table || obj->pages == NULL)
+ return 0;
+
+ ops->put_pages(obj);
+
+ list_del(&obj->gtt_list);
if (i915_gem_object_is_purgeable(obj))
i915_gem_object_truncate(obj);
@@ -1467,7 +1474,7 @@ i915_gem_purge(struct drm_i915_private *dev_priv, long
target)
&dev_priv->mm.unbound_list,
gtt_list) {
if (i915_gem_object_is_purgeable(obj) &&
- i915_gem_object_put_pages_gtt(obj) == 0) {
+ i915_gem_object_put_pages(obj) == 0) {
count += obj->base.size >> PAGE_SHIFT;
if (count >= target)
return count;
@@ -1479,7 +1486,7 @@ i915_gem_purge(struct drm_i915_private *dev_priv, long
target)
mm_list) {
if (i915_gem_object_is_purgeable(obj) &&
i915_gem_object_unbind(obj) == 0 &&
- i915_gem_object_put_pages_gtt(obj) == 0) {
+ i915_gem_object_put_pages(obj) == 0) {
count += obj->base.size >> PAGE_SHIFT;
if (count >= target)
return count;
@@ -1497,10 +1504,10 @@ i915_gem_shrink_all(struct drm_i915_private *dev_priv)
i915_gem_evict_everything(dev_priv->dev);
list_for_each_entry_safe(obj, next, &dev_priv->mm.unbound_list,
gtt_list)
- i915_gem_object_put_pages_gtt(obj);
+ i915_gem_object_put_pages(obj);
}
-int
+static int
i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
{
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
@@ -1509,9 +1516,6 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj)
struct page *page;
gfp_t gfp;
- if (obj->pages || obj->sg_table)
- return 0;
-
/* Assert that the object is not currently in any GPU domain. As it
* wasn't in the GTT, there shouldn't be any way it could have been in
* a GPU cache
@@ -1561,7 +1565,6 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj)
if (i915_gem_object_needs_bit17_swizzle(obj))
i915_gem_object_do_bit_17_swizzle(obj);
- list_add_tail(&obj->gtt_list, &dev_priv->mm.unbound_list);
return 0;
err_pages:
@@ -1573,6 +1576,24 @@ err_pages:
return PTR_ERR(page);
}
+int
+i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
+{
+ struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+ const struct drm_i915_gem_object_ops *ops = obj->base.driver_private;
+ int ret;
+
+ if (obj->sg_table || obj->pages)
+ return 0;
+
+ ret = ops->get_pages(obj);
+ if (ret)
+ return ret;
+
+ list_add_tail(&obj->gtt_list, &dev_priv->mm.unbound_list);
+ return 0;
+}
+
void
i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *ring,
@@ -1828,7 +1849,7 @@ void i915_gem_reset(struct drm_device *dev)
list_for_each_entry_safe(obj, next, &dev_priv->mm.unbound_list,
gtt_list)
- i915_gem_object_put_pages_gtt(obj);
+ i915_gem_object_put_pages(obj);
/* The fence registers are invalidated so clear them out */
i915_gem_reset_fences(dev);
@@ -2818,7 +2839,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj,
return -E2BIG;
}
- ret = i915_gem_object_get_pages_gtt(obj);
+ ret = i915_gem_object_get_pages(obj);
if (ret)
return ret;
@@ -3557,9 +3578,10 @@ unlock:
return ret;
}
-void i915_gem_object_init(struct drm_i915_gem_object *obj)
+void i915_gem_object_init(struct drm_i915_gem_object *obj,
+ const struct drm_i915_gem_object_ops *ops)
{
- obj->base.driver_private = NULL;
+ obj->base.driver_private = (void *)ops;
INIT_LIST_HEAD(&obj->mm_list);
INIT_LIST_HEAD(&obj->gtt_list);
@@ -3574,6 +3596,11 @@ void i915_gem_object_init(struct drm_i915_gem_object
*obj)
i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size);
}
+static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
+ .get_pages = i915_gem_object_get_pages_gtt,
+ .put_pages = i915_gem_object_put_pages_gtt,
+};
+
struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
size_t size)
{
@@ -3600,7 +3627,7 @@ struct drm_i915_gem_object *i915_gem_alloc_object(struct
drm_device *dev,
mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping;
mapping_set_gfp_mask(mapping, mask);
- i915_gem_object_init(obj);
+ i915_gem_object_init(obj, &i915_gem_object_ops);
obj->base.write_domain = I915_GEM_DOMAIN_CPU;
obj->base.read_domains = I915_GEM_DOMAIN_CPU;
@@ -3658,7 +3685,7 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
dev_priv->mm.interruptible = was_interruptible;
}
- i915_gem_object_put_pages_gtt(obj);
+ i915_gem_object_put_pages(obj);
i915_gem_object_free_mmap_offset(obj);
drm_gem_object_release(&obj->base);
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index e5f0375..1203460 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -41,7 +41,7 @@ static struct sg_table *i915_gem_map_dma_buf(struct
dma_buf_attachment *attachme
if (ret)
return ERR_PTR(ret);
- ret = i915_gem_object_get_pages_gtt(obj);
+ ret = i915_gem_object_get_pages(obj);
if (ret) {
sg = ERR_PTR(ret);
goto out;
@@ -89,7 +89,7 @@ static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf)
goto out_unlock;
}
- ret = i915_gem_object_get_pages_gtt(obj);
+ ret = i915_gem_object_get_pages(obj);
if (ret) {
mutex_unlock(&dev->struct_mutex);
return ERR_PTR(ret);
--
1.7.10.4
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