C++ drm_free函数代码示例

int savage_do_cleanup_bci(drm_device_t *dev)
{
	drm_savage_private_t *dev_priv = dev->dev_private;

	if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
		if (dev_priv->fake_dma.handle)
			drm_free(dev_priv->fake_dma.handle,
				 SAVAGE_FAKE_DMA_SIZE, DRM_MEM_DRIVER);
	} else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
		   dev_priv->cmd_dma->type == _DRM_AGP &&
		   dev_priv->dma_type == SAVAGE_DMA_AGP)
		drm_core_ioremapfree(dev_priv->cmd_dma, dev);

	if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
	    dev->agp_buffer_map && dev->agp_buffer_map->handle) {
		drm_core_ioremapfree(dev->agp_buffer_map, dev);
		/* make sure the next instance (which may be running
		 * in PCI mode) doesn't try to use an old
		 * agp_buffer_map. */
		dev->agp_buffer_map = NULL;
	}

	if (dev_priv->dma_pages)
		drm_free(dev_priv->dma_pages,
			 sizeof(drm_savage_dma_page_t)*dev_priv->nr_dma_pages,
			 DRM_MEM_DRIVER);

	return 0;
}

static int drm_drawable_free(int idr, void *p, void *data)
{
    struct drm_drawable_info *info = p;

    if (info) {
        drm_free(info->rects, info->num_rects *
             sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
        drm_free(info, sizeof(*info), DRM_MEM_BUFS);
    }

    return 0;
}

int
drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
	      unsigned int user_order, unsigned int owner_order)
{
	int ret = 0;

	sman->mm = (struct drm_sman_mm *) drm_calloc(num_managers,
	    sizeof(*sman->mm), DRM_MEM_MM);
	if (!sman->mm) {
		ret = -ENOMEM;
		goto out;
	}
	sman->num_managers = num_managers;
	INIT_LIST_HEAD(&sman->owner_items);
	ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
	if (ret)
		goto out1;
	ret = drm_ht_create(&sman->user_hash_tab, user_order);
	if (!ret)
		goto out;

	drm_ht_remove(&sman->owner_hash_tab);
out1:
	drm_free(sman->mm, num_managers * sizeof(*sman->mm), DRM_MEM_MM);
out:
	return ret;
}

/* Free all blocks associated with the releasing file.
 */
void i915_mem_release(struct drm_device * dev, struct drm_file *file_priv,
		      struct mem_block *heap)
{
	struct mem_block *p;

	if (!heap || !heap->next)
		return;

	for (p = heap->next; p != heap; p = p->next) {
		if (p->file_priv == file_priv) {
			p->file_priv = NULL;
			mark_block(dev, p, 0);
		}
	}

	/* Assumes a single contiguous range.  Needs a special file_priv in
	 * 'heap' to stop it being subsumed.
	 */
	for (p = heap->next; p != heap; p = p->next) {
		while (p->file_priv == NULL && p->next->file_priv == NULL) {
			struct mem_block *q = p->next;
			p->size += q->size;
			p->next = q->next;
			p->next->prev = p;
			drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS);
		}
	}
}

static int mali_driver_load(struct drm_device *dev, unsigned long chipset)
{
	int ret;
	unsigned long base, size;
	drm_mali_private_t *dev_priv;
	printk(KERN_ERR "DRM: mali_driver_load start\n");

	dev_priv = drm_calloc(1, sizeof(drm_mali_private_t), DRM_MEM_DRIVER);
	if ( dev_priv == NULL ) return -ENOMEM;

	dev->dev_private = (void *)dev_priv;

	if ( NULL == dev->platformdev )
	{
		dev->platformdev = platform_device_register_simple(mali_drm_device_name, 0, NULL, 0);
		pdev = dev->platformdev;
	}

	#if 0
	base = drm_get_resource_start(dev, 1 );
	size = drm_get_resource_len(dev, 1 );
	#endif
	ret = drm_sman_init(&dev_priv->sman, 2, 12, 8);
	if ( ret ) drm_free(dev_priv, sizeof(dev_priv), DRM_MEM_DRIVER);
	//if ( ret ) kfree( dev_priv );

	printk(KERN_ERR "DRM: mali_driver_load done\n");

	return ret;
}

/* Shutdown.
 */
void i915_mem_takedown(struct mem_block **heap)
{
	struct mem_block *p;

	if (!*heap)
		return;

	for (p = (*heap)->next; p != *heap;) {
		struct mem_block *q = p;
		p = p->next;
		drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS);
	}

	drm_free(*heap, sizeof(**heap), DRM_MEM_BUFLISTS);
	*heap = NULL;
}

static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
				    unsigned long size, uint32_t page_flags,
				    vm_page_t dummy_read_page)
{
	struct radeon_device *rdev;
	struct radeon_ttm_tt *gtt;

	rdev = radeon_get_rdev(bdev);
#if __OS_HAS_AGP
#ifdef DUMBBELL_WIP
	if (rdev->flags & RADEON_IS_AGP) {
		return ttm_agp_tt_create(bdev, rdev->ddev->agp->agpdev,
					 size, page_flags, dummy_read_page);
	}
#endif /* DUMBBELL_WIP */
#endif

	gtt = kmalloc(sizeof(struct radeon_ttm_tt), DRM_MEM_DRIVER,
		      M_WAITOK | M_ZERO);
	if (gtt == NULL) {
		return NULL;
	}
	gtt->ttm.ttm.func = &radeon_backend_func;
	gtt->rdev = rdev;
	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
		drm_free(gtt, DRM_MEM_DRIVER);
		return NULL;
	}
	return &gtt->ttm.ttm;
}

static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
{
	struct radeon_ttm_tt *gtt = (void *)ttm;

	ttm_dma_tt_fini(&gtt->ttm);
	drm_free(gtt, DRM_MEM_DRIVER);
}

int drm_agp_alloc_ioctl(struct inode *inode, struct file *filp,
			unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_buffer_t request;
	drm_agp_buffer_t __user *argp = (void __user *)arg;
	int err;

	if (copy_from_user(&request, argp, sizeof(request)))
		return -EFAULT;

	err = drm_agp_alloc(dev, &request);
	if (err)
		return err;

	if (copy_to_user(argp, &request, sizeof(request))) {
		drm_agp_mem_t *entry = dev->agp->memory;

		dev->agp->memory = entry->next;
		dev->agp->memory->prev = NULL;
		drm_free_agp(entry->memory, entry->pages);
		drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
		return -EFAULT;
	}

	return 0;
}

int drm_platform_init(struct drm_driver *driver)
{
	struct drm_device *dev;
	int ret;

	DRM_DEBUG("\n");

	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
	if (!dev)
		return -ENOMEM;

	ret = drm_fill_in_platform_dev(dev, driver->platform_device,
					driver);
	if (ret) {
		printk(KERN_ERR "DRM: Fill_in_platform_dev failed.\n");
		goto err_g1;
	}

	ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);

	if (ret)
		goto err_g1;

	list_add_tail(&dev->driver_item, &driver->device_list);

	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, dev->primary->index);

	return 0;

err_g1:
	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	return ret;
}

void
drm_vblank_cleanup(struct drm_device *dev)
{
#if defined(__NetBSD__)
	int	i;
#endif /* defined(__NetBSD__) */

	if (dev->vblank == NULL)
		return; /* not initialised */

	timeout_del(&dev->vblank->vb_disable_timer);
#if defined(__NetBSD__)
	callout_destroy(&dev->vblank->vb_disable_timer);
#endif /* defined(__NetBSD__) */

	vblank_disable(dev);

#if defined(__NetBSD__)
	for (i = 0; i < dev->vblank->vb_num; i++)
		cv_destroy(&dev->vblank->vb_crtcs[i].condvar);
	mutex_destroy(&dev->vblank->vb_lock);
#endif /* defined(__NetBSD__) */

	drm_free(dev->vblank);
	dev->vblank = NULL;
}

int
drm_remove_magic(drm_device_t *dev, drm_magic_t magic)
{
	drm_magic_entry_t *prev = NULL;
	drm_magic_entry_t *pt;
	int		  hash;

	DRM_DEBUG("drm_remove_magic : %d", magic);
	hash = drm_hash_magic(magic);

	DRM_LOCK();
	for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
		if (pt->magic == magic) {
			if (dev->magiclist[hash].head == pt) {
				dev->magiclist[hash].head = pt->next;
			}
			if (dev->magiclist[hash].tail == pt) {
				dev->magiclist[hash].tail = prev;
			}
			if (prev) {
				prev->next = pt->next;
			}
			DRM_UNLOCK();
			drm_free(pt, sizeof (*pt), DRM_MEM_MAGIC);
			return (0);
		}
	}
	DRM_UNLOCK();

	return (EINVAL);
}

static void intel_destroy_plane(struct drm_plane *plane)
{
	struct intel_plane *intel_plane = to_intel_plane(plane);
	intel_disable_plane(plane);
	drm_plane_cleanup(plane);
	drm_free(intel_plane, DRM_MEM_KMS);
}

/**
 * Register.
 *
 * \param pdev - PCI device structure
 * \param ent entry from the PCI ID table with device type flags
 * \return zero on success or a negative number on failure.
 *
 * Attempt to gets inter module "drm" information. If we are first
 * then register the character device and inter module information.
 * Try and register, if we fail to register, backout previous work.
 */
int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
		struct drm_driver *driver)
{
	drm_device_t *dev;
	int ret;

	DRM_DEBUG("\n");

	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
	if (!dev)
		return -ENOMEM;

	pci_enable_device(pdev);

	if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
		goto err_g1;
	}
	if ((ret = drm_get_head(dev, &dev->primary)))
		goto err_g1;
	
	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, dev->primary.minor);

	return 0;

      err_g1:
	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
	return ret;
}

/**
 * radeon_driver_postclose_kms - drm callback for post close
 *
 * @dev: drm dev pointer
 * @file_priv: drm file
 *
 * On device post close, tear down vm on cayman+ (all asics).
 */
void radeon_driver_postclose_kms(struct drm_device *dev,
				 struct drm_file *file_priv)
{
	struct radeon_device *rdev = dev->dev_private;

	/* new gpu have virtual address space support */
	if (rdev->family >= CHIP_CAYMAN && file_priv->driver_priv) {
		struct radeon_fpriv *fpriv = file_priv->driver_priv;
		struct radeon_bo_va *bo_va;
		int r;

		r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
		if (!r) {
			bo_va = radeon_vm_bo_find(&fpriv->vm,
						  rdev->ring_tmp_bo.bo);
			if (bo_va)
				radeon_vm_bo_rmv(rdev, bo_va);
			radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
		}

		radeon_vm_fini(rdev, &fpriv->vm);
		drm_free(fpriv, DRM_MEM_DRIVER);
		file_priv->driver_priv = NULL;
	}
}