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;
}
/* FIXME Copy from upstream TTM "ttm_bo_create", upstream TTM does not export this, so copy it here */
static int ttm_bo_create_private(struct ttm_bo_device *bdev,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
unsigned long buffer_start,
bool interruptible,
struct file *persistent_swap_storage,
struct ttm_buffer_object **p_bo)
{
struct ttm_buffer_object *bo;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
int ret;
size_t acc_size =
ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0))
return ret;
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (unlikely(bo == NULL)) {
ttm_mem_global_free(mem_glob, acc_size);
return -ENOMEM;
}
ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
buffer_start, interruptible,
persistent_swap_storage, acc_size, NULL);
if (likely(ret == 0))
*p_bo = bo;
return ret;
}
static void ttm_bo_release_list(struct kref *list_kref)
{
struct ttm_buffer_object *bo =
container_of(list_kref, struct ttm_buffer_object, list_kref);
struct ttm_bo_device *bdev = bo->bdev;
size_t acc_size = bo->acc_size;
BUG_ON(atomic_read(&bo->list_kref.refcount));
BUG_ON(atomic_read(&bo->kref.refcount));
BUG_ON(atomic_read(&bo->cpu_writers));
BUG_ON(bo->sync_obj != NULL);
BUG_ON(bo->mem.mm_node != NULL);
BUG_ON(!list_empty(&bo->lru));
BUG_ON(!list_empty(&bo->ddestroy));
if (bo->ttm)
ttm_tt_destroy(bo->ttm);
atomic_dec(&bo->glob->bo_count);
if (bo->destroy)
bo->destroy(bo);
else {
kfree(bo);
}
ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
}
static void ttm_bo_user_destroy(struct ttm_buffer_object *bo)
{
struct ttm_bo_user_object *user_bo =
container_of(bo, struct ttm_bo_user_object, bo);
ttm_mem_global_free(bo->glob->mem_glob, bo->acc_size);
kfree(user_bo);
}
/**
* vmw_simple_resource_free - Free a simple resource object.
*
* @res: The struct vmw_resource member of the simple resource object.
*
* Frees memory and memory accounting for the object.
*/
static void vmw_simple_resource_free(struct vmw_resource *res)
{
struct vmw_user_simple_resource *usimple =
container_of(res, struct vmw_user_simple_resource,
simple.res);
struct vmw_private *dev_priv = res->dev_priv;
size_t size = usimple->account_size;
ttm_base_object_kfree(usimple, base);
ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
}
/* This is used for sg_table which is derived from user-pointer */
static void ttm_ub_bo_user_destroy(struct ttm_buffer_object *bo)
{
struct ttm_bo_user_object *user_bo =
container_of(bo, struct ttm_bo_user_object, bo);
#if (LINUX_VERSION_CODE > KERNEL_VERSION(3, 3, 0))
if (bo->sg) {
ttm_tt_free_user_pages(bo);
sg_free_table(bo->sg);
kfree(bo->sg);
bo->sg = NULL;
}
#endif
ttm_mem_global_free(bo->glob->mem_glob, bo->acc_size);
kfree(user_bo);
}
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_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;
}
int ttm_tt_set_user(struct ttm_tt *ttm,
struct task_struct *tsk,
unsigned long start, unsigned long num_pages)
{
struct mm_struct *mm = tsk->mm;
int ret;
int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
BUG_ON(num_pages != ttm->num_pages);
BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
/**
* Account user pages as lowmem pages for now.
*/
ret = ttm_mem_global_alloc(mem_glob, num_pages * PAGE_SIZE,
false, false);
if (unlikely(ret != 0))
return ret;
down_read(&mm->mmap_sem);
ret = get_user_pages(tsk, mm, start, num_pages,
write, 0, ttm->pages, NULL);
up_read(&mm->mmap_sem);
if (ret != num_pages && write) {
ttm_tt_free_user_pages(ttm);
ttm_mem_global_free(mem_glob, num_pages * PAGE_SIZE);
return -ENOMEM;
}
ttm->tsk = tsk;
ttm->start = start;
ttm->state = tt_unbound;
return 0;
}
static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
{
int write;
int dirty;
struct page *page;
int i;
struct ttm_backend *be = ttm->be;
BUG_ON(!(ttm->page_flags & TTM_PAGE_FLAG_USER));
write = ((ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0);
dirty = ((ttm->page_flags & TTM_PAGE_FLAG_USER_DIRTY) != 0);
if (be)
be->func->clear(be);
for (i = 0; i < ttm->num_pages; ++i) {
page = ttm->pages[i];
if (page == NULL)
continue;
if (page == ttm->dummy_read_page) {
BUG_ON(write);
continue;
}
if (write && dirty && !PageReserved(page))
set_page_dirty_lock(page);
ttm->pages[i] = NULL;
ttm_mem_global_free(ttm->glob->mem_glob, PAGE_SIZE);
put_page(page);
}
ttm->state = tt_unpopulated;
ttm->first_himem_page = ttm->num_pages;
ttm->last_lomem_page = -1;
}
/**
* 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);
}
int ttm_pl_ub_create_ioctl(struct ttm_object_file *tfile,
struct ttm_bo_device *bdev,
struct ttm_lock *lock, void *data)
{
union ttm_pl_create_ub_arg *arg = data;
struct ttm_pl_create_ub_req *req = &arg->req;
struct ttm_pl_rep *rep = &arg->rep;
struct ttm_buffer_object *bo;
struct ttm_buffer_object *tmp;
struct ttm_bo_user_object *user_bo;
uint32_t flags;
int ret = 0;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
struct ttm_placement placement = default_placement;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0))
size_t acc_size =
ttm_pl_size(bdev, (req->size + PAGE_SIZE - 1) >> PAGE_SHIFT);
#else
size_t acc_size = ttm_bo_acc_size(bdev, req->size,
sizeof(struct ttm_buffer_object));
#endif
if (req->user_address & ~PAGE_MASK) {
printk(KERN_ERR "User pointer buffer need page alignment\n");
return -EFAULT;
}
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0))
return ret;
flags = req->placement;
user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
if (unlikely(user_bo == NULL)) {
ttm_mem_global_free(mem_glob, acc_size);
return -ENOMEM;
}
ret = ttm_read_lock(lock, true);
if (unlikely(ret != 0)) {
ttm_mem_global_free(mem_glob, acc_size);
kfree(user_bo);
return ret;
}
bo = &user_bo->bo;
placement.num_placement = 1;
placement.placement = &flags;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0))
/* For kernel 3.0, use the desired type. */
#define TTM_HACK_WORKAROUND_ttm_bo_type_user ttm_bo_type_user
#else
/* TTM_HACK_WORKAROUND_ttm_bo_type_user -- Hack for porting,
as ttm_bo_type_user is no longer implemented.
This will not result in working code.
FIXME - to be removed. */
#warning warning: ttm_bo_type_user no longer supported
/* For kernel 3.3+, use the wrong type, which will compile but not work. */
#define TTM_HACK_WORKAROUND_ttm_bo_type_user ttm_bo_type_kernel
#endif
#if (LINUX_VERSION_CODE > KERNEL_VERSION(3, 3, 0))
/* Handle frame buffer allocated in user space, Convert
user space virtual address into pages list */
unsigned int page_nr = 0;
struct vm_area_struct *vma = NULL;
struct sg_table *sg = NULL;
unsigned long num_pages = 0;
struct page **pages = 0;
num_pages = (req->size + PAGE_SIZE - 1) >> PAGE_SHIFT;
pages = kzalloc(num_pages * sizeof(struct page *), GFP_KERNEL);
if (unlikely(pages == NULL)) {
printk(KERN_ERR "kzalloc pages failed\n");
return -ENOMEM;
}
down_read(¤t->mm->mmap_sem);
vma = find_vma(current->mm, req->user_address);
if (unlikely(vma == NULL)) {
up_read(¤t->mm->mmap_sem);
kfree(pages);
printk(KERN_ERR "find_vma failed\n");
return -EFAULT;
}
unsigned long before_flags = vma->vm_flags;
if (vma->vm_flags & (VM_IO | VM_PFNMAP))
vma->vm_flags = vma->vm_flags & ((~VM_IO) & (~VM_PFNMAP));
page_nr = get_user_pages(current, current->mm,
req->user_address,
(int)(num_pages), 1, 0, pages,
NULL);
vma->vm_flags = before_flags;
up_read(¤t->mm->mmap_sem);
/* can be written by caller, not forced */
if (unlikely(page_nr < num_pages)) {
kfree(pages);
pages = 0;
printk(KERN_ERR "get_user_pages err.\n");
return -ENOMEM;
}
sg = drm_prime_pages_to_sg(pages, num_pages);
if (unlikely(sg == NULL)) {
kfree(pages);
printk(KERN_ERR "drm_prime_pages_to_sg err.\n");
return -ENOMEM;
}
kfree(pages);
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0))
ret = ttm_bo_init(bdev,
bo,
req->size,
TTM_HACK_WORKAROUND_ttm_bo_type_user,
&placement,
req->page_alignment,
req->user_address,
true,
NULL,
acc_size,
NULL,
&ttm_bo_user_destroy);
#elif (LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0))
ret = ttm_bo_init(bdev,
bo,
req->size,
ttm_bo_type_sg,
&placement,
req->page_alignment,
req->user_address,
true,
NULL,
acc_size,
sg,
&ttm_ub_bo_user_destroy);
#else
ret = ttm_bo_init(bdev,
bo,
req->size,
ttm_bo_type_sg,
&placement,
req->page_alignment,
true,
NULL,
acc_size,
sg,
&ttm_ub_bo_user_destroy);
#endif
/*
* Note that the ttm_buffer_object_init function
* would've called the destroy function on failure!!
*/
ttm_read_unlock(lock);
if (unlikely(ret != 0))
goto out;
tmp = ttm_bo_reference(bo);
ret = ttm_base_object_init(tfile, &user_bo->base,
flags & TTM_PL_FLAG_SHARED,
ttm_buffer_type,
&ttm_bo_user_release,
&ttm_bo_user_ref_release);
if (unlikely(ret != 0))
goto out_err;
ret = ttm_bo_reserve(bo, true, false, false, 0);
if (unlikely(ret != 0))
goto out_err;
ttm_pl_fill_rep(bo, rep);
ttm_bo_unreserve(bo);
ttm_bo_unref(&bo);
out:
return 0;
out_err:
ttm_bo_unref(&tmp);
ttm_bo_unref(&bo);
return ret;
}
int ttm_pl_create_ioctl(struct ttm_object_file *tfile,
struct ttm_bo_device *bdev,
struct ttm_lock *lock, void *data)
{
union ttm_pl_create_arg *arg = data;
struct ttm_pl_create_req *req = &arg->req;
struct ttm_pl_rep *rep = &arg->rep;
struct ttm_buffer_object *bo;
struct ttm_buffer_object *tmp;
struct ttm_bo_user_object *user_bo;
uint32_t flags;
int ret = 0;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
struct ttm_placement placement = default_placement;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0))
size_t acc_size =
ttm_pl_size(bdev, (req->size + PAGE_SIZE - 1) >> PAGE_SHIFT);
#else
size_t acc_size = ttm_bo_acc_size(bdev, req->size,
sizeof(struct ttm_buffer_object));
#endif
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0))
return ret;
flags = req->placement;
user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
if (unlikely(user_bo == NULL)) {
ttm_mem_global_free(mem_glob, acc_size);
return -ENOMEM;
}
bo = &user_bo->bo;
ret = ttm_read_lock(lock, true);
if (unlikely(ret != 0)) {
ttm_mem_global_free(mem_glob, acc_size);
kfree(user_bo);
return ret;
}
placement.num_placement = 1;
placement.placement = &flags;
if ((flags & TTM_PL_MASK_CACHING) == 0)
flags |= TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0))
ret = ttm_bo_init(bdev, bo, req->size,
ttm_bo_type_device, &placement,
req->page_alignment, 0, true,
NULL, acc_size, NULL, &ttm_bo_user_destroy);
#else
ret = ttm_bo_init(bdev, bo, req->size,
ttm_bo_type_device, &placement,
req->page_alignment, true,
NULL, acc_size, NULL, &ttm_bo_user_destroy);
#endif
ttm_read_unlock(lock);
/*
* Note that the ttm_buffer_object_init function
* would've called the destroy function on failure!!
*/
if (unlikely(ret != 0))
goto out;
tmp = ttm_bo_reference(bo);
ret = ttm_base_object_init(tfile, &user_bo->base,
flags & TTM_PL_FLAG_SHARED,
ttm_buffer_type,
&ttm_bo_user_release,
&ttm_bo_user_ref_release);
if (unlikely(ret != 0))
goto out_err;
ret = ttm_bo_reserve(bo, true, false, false, 0);
if (unlikely(ret != 0))
goto out_err;
ttm_pl_fill_rep(bo, rep);
ttm_bo_unreserve(bo);
ttm_bo_unref(&bo);
out:
return 0;
out_err:
ttm_bo_unref(&tmp);
ttm_bo_unref(&bo);
return ret;
}
/**
* 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;
}
int ttm_bo_init(struct ttm_bo_device *bdev,
struct ttm_buffer_object *bo,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
unsigned long buffer_start,
bool interruptible,
struct file *persistent_swap_storage,
size_t acc_size,
struct sg_table *sg,
void (*destroy) (struct ttm_buffer_object *))
{
int ret = 0;
unsigned long num_pages;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (ret) {
pr_err("Out of kernel memory\n");
if (destroy)
(*destroy)(bo);
else
kfree(bo);
return -ENOMEM;
}
size += buffer_start & ~PAGE_MASK;
num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (num_pages == 0) {
pr_err("Illegal buffer object size\n");
if (destroy)
(*destroy)(bo);
else
kfree(bo);
ttm_mem_global_free(mem_glob, acc_size);
return -EINVAL;
}
bo->destroy = destroy;
kref_init(&bo->kref);
kref_init(&bo->list_kref);
atomic_set(&bo->cpu_writers, 0);
atomic_set(&bo->reserved, 1);
init_waitqueue_head(&bo->event_queue);
INIT_LIST_HEAD(&bo->lru);
INIT_LIST_HEAD(&bo->ddestroy);
INIT_LIST_HEAD(&bo->swap);
INIT_LIST_HEAD(&bo->io_reserve_lru);
bo->bdev = bdev;
bo->glob = bdev->glob;
bo->type = type;
bo->num_pages = num_pages;
bo->mem.size = num_pages << PAGE_SHIFT;
bo->mem.mem_type = TTM_PL_SYSTEM;
bo->mem.num_pages = bo->num_pages;
bo->mem.mm_node = NULL;
bo->mem.page_alignment = page_alignment;
bo->mem.bus.io_reserved_vm = false;
bo->mem.bus.io_reserved_count = 0;
bo->buffer_start = buffer_start & PAGE_MASK;
bo->priv_flags = 0;
bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
bo->seq_valid = false;
bo->persistent_swap_storage = persistent_swap_storage;
bo->acc_size = acc_size;
bo->sg = sg;
atomic_inc(&bo->glob->bo_count);
ret = ttm_bo_check_placement(bo, placement);
if (unlikely(ret != 0))
goto out_err;
/*
* For ttm_bo_type_device buffers, allocate
* address space from the device.
*/
if (bo->type == ttm_bo_type_device ||
bo->type == ttm_bo_type_sg) {
ret = ttm_bo_setup_vm(bo);
if (ret)
goto out_err;
}
ret = ttm_bo_validate(bo, placement, interruptible, false, false);
if (ret)
goto out_err;
ttm_bo_unreserve(bo);
return 0;
out_err:
ttm_bo_unreserve(bo);
ttm_bo_unref(&bo);
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;
}
