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-rw-r--r--linux-core/drmP.h7
-rw-r--r--linux-core/drm_gem.c26
-rw-r--r--linux-core/i915_drv.c1
-rw-r--r--linux-core/i915_gem.c91
4 files changed, 98 insertions, 27 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 419b4be3..fc7043d7 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -781,6 +781,13 @@ struct drm_driver {
uint32_t read_domains,
uint32_t write_domain);
+ /**
+ * Driver-specific callback to flush pwrite through chipset
+ */
+ int (*gem_flush_pwrite) (struct drm_gem_object *obj,
+ uint64_t offset,
+ uint64_t size);
+
struct drm_fence_driver *fence_driver;
struct drm_bo_driver *bo_driver;
diff --git a/linux-core/drm_gem.c b/linux-core/drm_gem.c
index 6c462921..14cf7e47 100644
--- a/linux-core/drm_gem.c
+++ b/linux-core/drm_gem.c
@@ -266,6 +266,7 @@ drm_gem_pread_ioctl(struct drm_device *dev, void *data,
struct drm_gem_object *obj;
ssize_t read;
loff_t offset;
+ int ret;
if (!(dev->driver->driver_features & DRIVER_GEM))
return -ENODEV;
@@ -274,6 +275,15 @@ drm_gem_pread_ioctl(struct drm_device *dev, void *data,
if (obj == NULL)
return -EINVAL;
+ if (dev->driver->gem_set_domain) {
+ ret = dev->driver->gem_set_domain (obj,
+ DRM_GEM_DOMAIN_CPU,
+ 0);
+ if (ret) {
+ drm_gem_object_unreference(obj);
+ return ret;
+ }
+ }
offset = args->offset;
read = vfs_read(obj->filp, (char __user *)(uintptr_t)args->data_ptr,
@@ -343,6 +353,7 @@ drm_gem_pwrite_ioctl(struct drm_device *dev, void *data,
struct drm_gem_object *obj;
ssize_t written;
loff_t offset;
+ int ret;
if (!(dev->driver->driver_features & DRIVER_GEM))
return -ENODEV;
@@ -351,11 +362,21 @@ drm_gem_pwrite_ioctl(struct drm_device *dev, void *data,
if (obj == NULL)
return -EINVAL;
+ if (dev->driver->gem_set_domain) {
+ ret = dev->driver->gem_set_domain (obj,
+ DRM_GEM_DOMAIN_CPU,
+ 0);
+ if (ret) {
+ drm_gem_object_unreference(obj);
+ return ret;
+ }
+ }
offset = args->offset;
written = vfs_write(obj->filp,
(char __user *)(uintptr_t) args->data_ptr,
args->size, &offset);
+
if (written != args->size) {
drm_gem_object_unreference(obj);
if (written < 0)
@@ -364,6 +385,11 @@ drm_gem_pwrite_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
+ if (dev->driver->gem_flush_pwrite)
+ dev->driver->gem_flush_pwrite(obj,
+ args->offset,
+ args->size);
+
drm_gem_object_unreference(obj);
return 0;
diff --git a/linux-core/i915_drv.c b/linux-core/i915_drv.c
index ae8cf3e0..cc47ed64 100644
--- a/linux-core/i915_drv.c
+++ b/linux-core/i915_drv.c
@@ -589,6 +589,7 @@ static struct drm_driver driver = {
.gem_init_object = i915_gem_init_object,
.gem_free_object = i915_gem_free_object,
.gem_set_domain = i915_gem_set_domain_ioctl,
+ .gem_flush_pwrite = i915_gem_flush_pwrite,
.fops = {
.owner = THIS_MODULE,
.open = drm_open,
diff --git a/linux-core/i915_gem.c b/linux-core/i915_gem.c
index 90d1d52b..9d701ba1 100644
--- a/linux-core/i915_gem.c
+++ b/linux-core/i915_gem.c
@@ -377,6 +377,37 @@ i915_gem_evict_something(struct drm_device *dev)
return 0;
}
+static int
+i915_gem_object_get_page_list(struct drm_gem_object *obj)
+{
+ struct drm_i915_gem_object *obj_priv = obj->driver_private;
+ int page_count, i;
+ if (obj_priv->page_list)
+ return 0;
+
+ /* Get the list of pages out of our struct file. They'll be pinned
+ * at this point until we release them.
+ */
+ page_count = obj->size / PAGE_SIZE;
+ BUG_ON(obj_priv->page_list != NULL);
+ obj_priv->page_list = drm_calloc(page_count, sizeof(struct page *),
+ DRM_MEM_DRIVER);
+ if (obj_priv->page_list == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < page_count; i++) {
+ obj_priv->page_list[i] =
+ find_or_create_page(obj->filp->f_mapping, i, GFP_HIGHUSER);
+
+ if (obj_priv->page_list[i] == NULL) {
+ i915_gem_object_free_page_list(obj);
+ return -ENOMEM;
+ }
+ unlock_page(obj_priv->page_list[i]);
+ }
+ return 0;
+}
+
/**
* Finds free space in the GTT aperture and binds the object there.
*/
@@ -387,7 +418,7 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj_priv = obj->driver_private;
struct drm_memrange_node *free_space;
- int page_count, i, ret;
+ int page_count, ret;
if (alignment == 0)
alignment = PAGE_SIZE;
@@ -432,33 +463,14 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
DRM_INFO("Binding object of size %d at 0x%08x\n",
obj->size, obj_priv->gtt_offset);
#endif
-
- /* Get the list of pages out of our struct file. They'll be pinned
- * at this point until we release them.
- */
- page_count = obj->size / PAGE_SIZE;
- BUG_ON(obj_priv->page_list != NULL);
- obj_priv->page_list = drm_calloc(page_count, sizeof(struct page *),
- DRM_MEM_DRIVER);
- if (obj_priv->page_list == NULL) {
- drm_memrange_put_block(obj_priv->gtt_space);
+ ret = i915_gem_object_get_page_list (obj);
+ if (ret) {
+ drm_memrange_put_block (obj_priv->gtt_space);
obj_priv->gtt_space = NULL;
- return -ENOMEM;
- }
-
- for (i = 0; i < page_count; i++) {
- obj_priv->page_list[i] =
- find_or_create_page(obj->filp->f_mapping, i, GFP_HIGHUSER);
-
- if (obj_priv->page_list[i] == NULL) {
- i915_gem_object_free_page_list(obj);
- drm_memrange_put_block(obj_priv->gtt_space);
- obj_priv->gtt_space = NULL;
- return -ENOMEM;
- }
- unlock_page(obj_priv->page_list[i]);
+ return ret;
}
+ page_count = obj->size / PAGE_SIZE;
/* Create an AGP memory structure pointing at our pages, and bind it
* into the GTT.
*/
@@ -1052,14 +1064,39 @@ void i915_gem_free_object(struct drm_gem_object *obj)
int
i915_gem_set_domain_ioctl(struct drm_gem_object *obj,
- uint32_t read_domains,
- uint32_t write_domain)
+ uint32_t read_domains,
+ uint32_t write_domain)
{
i915_gem_object_set_domain(obj, read_domains, write_domain);
i915_gem_dev_set_domain(obj->dev);
return 0;
}
+int
+i915_gem_flush_pwrite(struct drm_gem_object *obj,
+ uint64_t offset, uint64_t size)
+{
+ struct drm_device *dev = obj->dev;
+ struct drm_i915_gem_object *obj_priv = obj->driver_private;
+ /*
+ * As far as I can tell, writes of > 64 bytes will use non-temporal
+ * stores which should obviate the need for this clflush.
+ * It doesn't work for me though...
+ */
+/* if (size <= 64) */{
+ if (obj_priv->gtt_space == NULL) {
+ int ret = i915_gem_object_get_page_list (obj);
+ if (ret)
+ return ret;
+ }
+ i915_gem_clflush_object(obj);
+ if (obj_priv->gtt_space == NULL)
+ i915_gem_object_free_page_list (obj);
+ }
+ drm_agp_chipset_flush(dev);
+ return 0;
+}
+
void
i915_gem_lastclose(struct drm_device *dev)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 04:41:34 +0000