size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
unsigned long bo_size,
unsigned struct_size)
{
unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT;
size_t size = 0;
size += ttm_round_pot(struct_size);
size += PAGE_ALIGN(npages * sizeof(void *));
size += ttm_round_pot(sizeof(struct ttm_tt));
return size;
}
int ttm_bo_global_init(struct drm_global_reference *ref)
{
struct ttm_bo_global_ref *bo_ref =
container_of(ref, struct ttm_bo_global_ref, ref);
struct ttm_bo_global *glob = ref->object;
int ret;
mutex_init(&glob->device_list_mutex);
spin_lock_init(&glob->lru_lock);
glob->mem_glob = bo_ref->mem_glob;
glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
if (unlikely(glob->dummy_read_page == NULL)) {
ret = -ENOMEM;
goto out_no_drp;
}
INIT_LIST_HEAD(&glob->swap_lru);
INIT_LIST_HEAD(&glob->device_list);
ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
if (unlikely(ret != 0)) {
printk(KERN_ERR TTM_PFX
"Could not register buffer object swapout.\n");
goto out_no_shrink;
}
glob->ttm_bo_extra_size =
ttm_round_pot(sizeof(struct ttm_tt)) +
ttm_round_pot(sizeof(struct ttm_backend));
glob->ttm_bo_size = glob->ttm_bo_extra_size +
ttm_round_pot(sizeof(struct ttm_buffer_object));
atomic_set(&glob->bo_count, 0);
ret = kobject_init_and_add(
&glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
if (unlikely(ret != 0))
kobject_put(&glob->kobj);
return ret;
out_no_shrink:
__free_page(glob->dummy_read_page);
out_no_drp:
kfree(glob);
return ret;
}
static int vmw_ttm_populate(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_tt =
container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
int ret;
if (ttm->state != tt_unpopulated)
return 0;
if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
size_t size =
ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
ret = ttm_mem_global_alloc(glob, size, false, true);
if (unlikely(ret != 0))
return ret;
ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
if (unlikely(ret != 0))
ttm_mem_global_free(glob, size);
} else
ret = ttm_pool_populate(ttm);
return ret;
}
static size_t ttm_pl_size(struct ttm_bo_device *bdev, unsigned long num_pages)
{
size_t page_array_size =
(num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
if (unlikely(pl_bo_size == 0)) {
pl_bo_size = bdev->glob->ttm_bo_extra_size +
ttm_round_pot(sizeof(struct ttm_bo_user_object));
}
return bdev->glob->ttm_bo_size + 2 * page_array_size;
}
static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
dma_ttm.ttm);
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
vmw_ttm_unmap_dma(vmw_tt);
if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
size_t size =
ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
ttm_mem_global_free(glob, size);
} else
ttm_pool_unpopulate(ttm);
}
/**
* vmw_ttm_map_dma - Make sure TTM pages are visible to the device
*
* @vmw_tt: Pointer to a struct vmw_ttm_tt
*
* Select the correct function for and make sure the TTM pages are
* visible to the device. Allocate storage for the device mappings.
* If a mapping has already been performed, indicated by the storage
* pointer being non NULL, the function returns success.
*/
static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
{
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
struct ttm_operation_ctx ctx = {
.interruptible = true,
.no_wait_gpu = false
};
struct vmw_piter iter;
dma_addr_t old;
int ret = 0;
static size_t sgl_size;
static size_t sgt_size;
if (vmw_tt->mapped)
return 0;
vsgt->mode = dev_priv->map_mode;
vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
vsgt->addrs = vmw_tt->dma_ttm.dma_address;
vsgt->sgt = &vmw_tt->sgt;
switch (dev_priv->map_mode) {
case vmw_dma_map_bind:
case vmw_dma_map_populate:
if (unlikely(!sgl_size)) {
sgl_size = ttm_round_pot(sizeof(struct scatterlist));
sgt_size = ttm_round_pot(sizeof(struct sg_table));
}
vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
if (unlikely(ret != 0))
return ret;
ret = sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
vsgt->num_pages, 0,
(unsigned long)
vsgt->num_pages << PAGE_SHIFT,
GFP_KERNEL);
if (unlikely(ret != 0))
goto out_sg_alloc_fail;
if (vsgt->num_pages > vmw_tt->sgt.nents) {
uint64_t over_alloc =
sgl_size * (vsgt->num_pages -
vmw_tt->sgt.nents);
ttm_mem_global_free(glob, over_alloc);
vmw_tt->sg_alloc_size -= over_alloc;
}
ret = vmw_ttm_map_for_dma(vmw_tt);
if (unlikely(ret != 0))
goto out_map_fail;
break;
default:
break;
}
old = ~((dma_addr_t) 0);
vmw_tt->vsgt.num_regions = 0;
for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
dma_addr_t cur = vmw_piter_dma_addr(&iter);
if (cur != old + PAGE_SIZE)
vmw_tt->vsgt.num_regions++;
old = cur;
}
vmw_tt->mapped = true;
return 0;
out_map_fail:
sg_free_table(vmw_tt->vsgt.sgt);
vmw_tt->vsgt.sgt = NULL;
out_sg_alloc_fail:
ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
return ret;
}
/**
* vmw_ttm_unmap_dma - Tear down any TTM page device mappings
*
* @vmw_tt: Pointer to a struct vmw_ttm_tt
*
* Tear down any previously set up device DMA mappings and free
* any storage space allocated for them. If there are no mappings set up,
* this function is a NOP.
*/
static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
{
struct vmw_private *dev_priv = vmw_tt->dev_priv;
if (!vmw_tt->vsgt.sgt)
return;
switch (dev_priv->map_mode) {
case vmw_dma_map_bind:
case vmw_dma_map_populate:
vmw_ttm_unmap_from_dma(vmw_tt);
sg_free_table(vmw_tt->vsgt.sgt);
vmw_tt->vsgt.sgt = NULL;
ttm_mem_global_free(vmw_mem_glob(dev_priv),
vmw_tt->sg_alloc_size);
break;
default:
break;
}
vmw_tt->mapped = false;
}
/**
* vmw_bo_map_dma - Make sure buffer object pages are visible to the device
*
* @bo: Pointer to a struct ttm_buffer_object
*
* Wrapper around vmw_ttm_map_dma, that takes a TTM buffer object pointer
* instead of a pointer to a struct vmw_ttm_backend as argument.
* Note that the buffer object must be either pinned or reserved before
* calling this function.
*/
int vmw_bo_map_dma(struct ttm_buffer_object *bo)
{
struct vmw_ttm_tt *vmw_tt =
container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
return vmw_ttm_map_dma(vmw_tt);
}
/**
* vmw_bo_unmap_dma - Make sure buffer object pages are visible to the device
*
* @bo: Pointer to a struct ttm_buffer_object
*
* Wrapper around vmw_ttm_unmap_dma, that takes a TTM buffer object pointer
* instead of a pointer to a struct vmw_ttm_backend as argument.
*/
void vmw_bo_unmap_dma(struct ttm_buffer_object *bo)
{
struct vmw_ttm_tt *vmw_tt =
container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
vmw_ttm_unmap_dma(vmw_tt);
}
/**
* vmw_bo_sg_table - Return a struct vmw_sg_table object for a
* TTM buffer object
*
* @bo: Pointer to a struct ttm_buffer_object
*
* Returns a pointer to a struct vmw_sg_table object. The object should
* not be freed after use.
* Note that for the device addresses to be valid, the buffer object must
* either be reserved or pinned.
*/
const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
{
struct vmw_ttm_tt *vmw_tt =
container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
return &vmw_tt->vsgt;
}
static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
{
struct vmw_ttm_tt *vmw_be =
container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
int ret;
ret = vmw_ttm_map_dma(vmw_be);
if (unlikely(ret != 0))
return ret;
vmw_be->gmr_id = bo_mem->start;
vmw_be->mem_type = bo_mem->mem_type;
switch (bo_mem->mem_type) {
case VMW_PL_GMR:
return vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
ttm->num_pages, vmw_be->gmr_id);
case VMW_PL_MOB:
if (unlikely(vmw_be->mob == NULL)) {
vmw_be->mob =
vmw_mob_create(ttm->num_pages);
if (unlikely(vmw_be->mob == NULL))
return -ENOMEM;
}
return vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
&vmw_be->vsgt, ttm->num_pages,
vmw_be->gmr_id);
default:
BUG();
}
return 0;
}
static int vmw_ttm_unbind(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_be =
container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
switch (vmw_be->mem_type) {
case VMW_PL_GMR:
vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
break;
case VMW_PL_MOB:
vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
break;
default:
BUG();
}
if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
vmw_ttm_unmap_dma(vmw_be);
return 0;
}
static void vmw_ttm_destroy(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_be =
container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
vmw_ttm_unmap_dma(vmw_be);
if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
ttm_dma_tt_fini(&vmw_be->dma_ttm);
else
ttm_tt_fini(ttm);
if (vmw_be->mob)
vmw_mob_destroy(vmw_be->mob);
kfree(vmw_be);
}
static int vmw_ttm_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
{
struct vmw_ttm_tt *vmw_tt =
container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
int ret;
if (ttm->state != tt_unpopulated)
return 0;
if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
size_t size =
ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
ret = ttm_mem_global_alloc(glob, size, ctx);
if (unlikely(ret != 0))
return ret;
ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev,
ctx);
if (unlikely(ret != 0))
ttm_mem_global_free(glob, size);
} else
ret = ttm_pool_populate(ttm, ctx);
return ret;
}
static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
dma_ttm.ttm);
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
if (vmw_tt->mob) {
vmw_mob_destroy(vmw_tt->mob);
vmw_tt->mob = NULL;
}
vmw_ttm_unmap_dma(vmw_tt);
if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
size_t size =
ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
ttm_mem_global_free(glob, size);
} else
ttm_pool_unpopulate(ttm);
}
static struct ttm_backend_func vmw_ttm_func = {
.bind = vmw_ttm_bind,
.unbind = vmw_ttm_unbind,
.destroy = vmw_ttm_destroy,
};
static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
uint32_t page_flags)
{
struct vmw_ttm_tt *vmw_be;
int ret;
vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
if (!vmw_be)
return NULL;
vmw_be->dma_ttm.ttm.func = &vmw_ttm_func;
vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
vmw_be->mob = NULL;
if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags);
else
ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags);
if (unlikely(ret != 0))
goto out_no_init;
return &vmw_be->dma_ttm.ttm;
out_no_init:
kfree(vmw_be);
return NULL;
}
static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
}
static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man)
{
switch (type) {
case TTM_PL_SYSTEM:
/* System memory */
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_CACHED;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case TTM_PL_VRAM:
/* "On-card" video ram */
man->func = &ttm_bo_manager_func;
man->gpu_offset = 0;
man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_CACHED;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case VMW_PL_GMR:
case VMW_PL_MOB:
/*
* "Guest Memory Regions" is an aperture like feature with
* one slot per bo. There is an upper limit of the number of
* slots as well as the bo size.
*/
man->func = &vmw_gmrid_manager_func;
man->gpu_offset = 0;
man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_CACHED;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
default:
DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
return -EINVAL;
}
return 0;
}
static void vmw_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
{
*placement = vmw_sys_placement;
}
static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
struct ttm_object_file *tfile =
vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
return vmw_user_bo_verify_access(bo, tfile);
}
static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
mem->bus.addr = NULL;
mem->bus.is_iomem = false;
mem->bus.offset = 0;
mem->bus.size = mem->num_pages << PAGE_SHIFT;
mem->bus.base = 0;
if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
return -EINVAL;
switch (mem->mem_type) {
case TTM_PL_SYSTEM:
case VMW_PL_GMR:
case VMW_PL_MOB:
return 0;
case TTM_PL_VRAM:
mem->bus.offset = mem->start << PAGE_SHIFT;
mem->bus.base = dev_priv->vram_start;
mem->bus.is_iomem = true;
break;
default:
return -EINVAL;
}
return 0;
}
static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
}
static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
{
return 0;
}
/**
* vmw_move_notify - TTM move_notify_callback
*
* @bo: The TTM buffer object about to move.
* @mem: The struct ttm_mem_reg indicating to what memory
* region the move is taking place.
*
* Calls move_notify for all subsystems needing it.
* (currently only resources).
*/
static void vmw_move_notify(struct ttm_buffer_object *bo,
bool evict,
struct ttm_mem_reg *mem)
{
vmw_bo_move_notify(bo, mem);
vmw_query_move_notify(bo, mem);
}
/**
* vmw_ttm_map_dma - Make sure TTM pages are visible to the device
*
* @vmw_tt: Pointer to a struct vmw_ttm_tt
*
* Select the correct function for and make sure the TTM pages are
* visible to the device. Allocate storage for the device mappings.
* If a mapping has already been performed, indicated by the storage
* pointer being non NULL, the function returns success.
*/
static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
{
struct vmw_private *dev_priv = vmw_tt->dev_priv;
struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
struct vmw_piter iter;
dma_addr_t old;
int ret = 0;
static size_t sgl_size;
static size_t sgt_size;
if (vmw_tt->mapped)
return 0;
vsgt->mode = dev_priv->map_mode;
vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
vsgt->addrs = vmw_tt->dma_ttm.dma_address;
vsgt->sgt = &vmw_tt->sgt;
switch (dev_priv->map_mode) {
case vmw_dma_map_bind:
case vmw_dma_map_populate:
if (unlikely(!sgl_size)) {
sgl_size = ttm_round_pot(sizeof(struct scatterlist));
sgt_size = ttm_round_pot(sizeof(struct sg_table));
}
vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, false,
true);
if (unlikely(ret != 0))
return ret;
ret = sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
vsgt->num_pages, 0,
(unsigned long)
vsgt->num_pages << PAGE_SHIFT,
GFP_KERNEL);
if (unlikely(ret != 0))
goto out_sg_alloc_fail;
if (vsgt->num_pages > vmw_tt->sgt.nents) {
uint64_t over_alloc =
sgl_size * (vsgt->num_pages -
vmw_tt->sgt.nents);
ttm_mem_global_free(glob, over_alloc);
vmw_tt->sg_alloc_size -= over_alloc;
}
ret = vmw_ttm_map_for_dma(vmw_tt);
if (unlikely(ret != 0))
goto out_map_fail;
break;
default:
break;
}
old = ~((dma_addr_t) 0);
vmw_tt->vsgt.num_regions = 0;
for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
dma_addr_t cur = vmw_piter_dma_addr(&iter);
if (cur != old + PAGE_SIZE)
vmw_tt->vsgt.num_regions++;
old = cur;
}
vmw_tt->mapped = true;
return 0;
out_map_fail:
sg_free_table(vmw_tt->vsgt.sgt);
vmw_tt->vsgt.sgt = NULL;
out_sg_alloc_fail:
ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
return ret;
}
/**
* vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to
* create a struct vmw_simple_resource.
*
* @dev: Pointer to a struct drm device.
* @data: Ioctl argument.
* @file_priv: Pointer to a struct drm_file identifying the caller.
* @func: Pointer to a struct vmw_simple_resource_func identifying the
* simple resource type.
*
* Returns:
* 0 if success,
* Negative error value on error.
*/
int
vmw_simple_resource_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv,
const struct vmw_simple_resource_func *func)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_user_simple_resource *usimple;
struct vmw_resource *res;
struct vmw_resource *tmp;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct ttm_operation_ctx ctx = {
.interruptible = true,
.no_wait_gpu = false
};
size_t alloc_size;
size_t account_size;
int ret;
alloc_size = offsetof(struct vmw_user_simple_resource, simple) +
func->size;
account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE +
TTM_OBJ_EXTRA_SIZE;
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (ret)
return ret;
ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size,
&ctx);
ttm_read_unlock(&dev_priv->reservation_sem);
if (ret) {
if (ret != -ERESTARTSYS)
DRM_ERROR("Out of graphics memory for %s"
" creation.\n", func->res_func.type_name);
goto out_ret;
}
usimple = kzalloc(alloc_size, GFP_KERNEL);
if (!usimple) {
ttm_mem_global_free(vmw_mem_glob(dev_priv),
account_size);
ret = -ENOMEM;
goto out_ret;
}
usimple->simple.func = func;
usimple->account_size = account_size;
res = &usimple->simple.res;
usimple->base.shareable = false;
usimple->base.tfile = NULL;
/*
* From here on, the destructor takes over resource freeing.
*/
ret = vmw_simple_resource_init(dev_priv, &usimple->simple,
data, vmw_simple_resource_free);
if (ret)
goto out_ret;
tmp = vmw_resource_reference(res);
ret = ttm_base_object_init(tfile, &usimple->base, false,
func->ttm_res_type,
&vmw_simple_resource_base_release, NULL);
if (ret) {
vmw_resource_unreference(&tmp);
goto out_err;
}
func->set_arg_handle(data, usimple->base.handle);
out_err:
vmw_resource_unreference(&res);
out_ret:
return ret;
}
/**
* vmw_simple_resource_lookup - Look up a simple resource from its user-space
* handle.
*
* @tfile: struct ttm_object_file identifying the caller.
* @handle: The user-space handle.
* @func: The struct vmw_simple_resource_func identifying the simple resource
* type.
*
* Returns: Refcounted pointer to the embedded struct vmw_resource if
* successfule. Error pointer otherwise.
*/
struct vmw_resource *
vmw_simple_resource_lookup(struct ttm_object_file *tfile,
uint32_t handle,
const struct vmw_simple_resource_func *func)
{
struct vmw_user_simple_resource *usimple;
struct ttm_base_object *base;
struct vmw_resource *res;
base = ttm_base_object_lookup(tfile, handle);
if (!base) {
DRM_ERROR("Invalid %s handle 0x%08lx.\n",
func->res_func.type_name,
(unsigned long) handle);
return ERR_PTR(-ESRCH);
}
if (ttm_base_object_type(base) != func->ttm_res_type) {
ttm_base_object_unref(&base);
DRM_ERROR("Invalid type of %s handle 0x%08lx.\n",
func->res_func.type_name,
(unsigned long) handle);
return ERR_PTR(-EINVAL);
}
usimple = container_of(base, typeof(*usimple), base);
res = vmw_resource_reference(&usimple->simple.res);
ttm_base_object_unref(&base);
return res;
}