struct ttm_resource_manager *new_man = ttm_manager_type(bdev, mem->mem_type);
int ret;
- ret = ttm_mem_io_lock(old_man, true);
- if (unlikely(ret != 0))
- goto out_err;
- ttm_bo_unmap_virtual_locked(bo);
- ttm_mem_io_unlock(old_man);
+ ttm_bo_unmap_virtual(bo);
/*
* Create and bind a ttm if required.
struct ttm_buffer_object *bo =
container_of(kref, struct ttm_buffer_object, kref);
struct ttm_bo_device *bdev = bo->bdev;
- struct ttm_resource_manager *man = ttm_manager_type(bdev, bo->mem.mem_type);
size_t acc_size = bo->acc_size;
int ret;
bo->bdev->driver->release_notify(bo);
drm_vma_offset_remove(bdev->vma_manager, &bo->base.vma_node);
- ttm_mem_io_lock(man, false);
- ttm_mem_io_free_vm(bo);
- ttm_mem_io_unlock(man);
+ ttm_mem_io_free(bdev, &bo->mem);
}
if (!dma_resv_test_signaled_rcu(bo->base.resv, true) ||
evict_mem = bo->mem;
evict_mem.mm_node = NULL;
- evict_mem.bus.io_reserved_vm = false;
- evict_mem.bus.io_reserved_count = 0;
evict_mem.bus.base = 0;
evict_mem.bus.offset = 0;
evict_mem.bus.addr = NULL;
mem.num_pages = bo->num_pages;
mem.size = mem.num_pages << PAGE_SHIFT;
mem.page_alignment = bo->mem.page_alignment;
- mem.bus.io_reserved_vm = false;
- mem.bus.io_reserved_count = 0;
mem.bus.base = 0;
mem.bus.offset = 0;
mem.bus.addr = NULL;
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->type = type;
bo->num_pages = num_pages;
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->mem.bus.base = 0;
bo->mem.bus.offset = 0;
bo->mem.bus.addr = NULL;
* buffer object vm functions.
*/
-void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
-{
- struct ttm_bo_device *bdev = bo->bdev;
-
- drm_vma_node_unmap(&bo->base.vma_node, bdev->dev_mapping);
- ttm_mem_io_free_vm(bo);
-}
-
void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
{
struct ttm_bo_device *bdev = bo->bdev;
- struct ttm_resource_manager *man = ttm_manager_type(bdev, bo->mem.mem_type);
- ttm_mem_io_lock(man, false);
- ttm_bo_unmap_virtual_locked(bo);
- ttm_mem_io_unlock(man);
+ drm_vma_node_unmap(&bo->base.vma_node, bdev->dev_mapping);
+ ttm_mem_io_free(bdev, &bo->mem);
}
-
-
EXPORT_SYMBOL(ttm_bo_unmap_virtual);
int ttm_bo_wait(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_move_ttm);
-int ttm_mem_io_lock(struct ttm_resource_manager *man, bool interruptible)
-{
- if (likely(!man->use_io_reserve_lru))
- return 0;
-
- if (interruptible)
- return mutex_lock_interruptible(&man->io_reserve_mutex);
-
- mutex_lock(&man->io_reserve_mutex);
- return 0;
-}
-
-void ttm_mem_io_unlock(struct ttm_resource_manager *man)
-{
- if (likely(!man->use_io_reserve_lru))
- return;
-
- mutex_unlock(&man->io_reserve_mutex);
-}
-
-static int ttm_mem_io_evict(struct ttm_resource_manager *man)
-{
- struct ttm_buffer_object *bo;
-
- bo = list_first_entry_or_null(&man->io_reserve_lru,
- struct ttm_buffer_object,
- io_reserve_lru);
- if (!bo)
- return -ENOSPC;
-
- list_del_init(&bo->io_reserve_lru);
- ttm_bo_unmap_virtual_locked(bo);
- return 0;
-}
-
int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
struct ttm_resource *mem)
{
- struct ttm_resource_manager *man = ttm_manager_type(bdev, mem->mem_type);
- int ret;
-
- if (mem->bus.io_reserved_count++)
+ if (mem->bus.base || mem->bus.offset || mem->bus.addr)
return 0;
+ mem->bus.is_iomem = false;
if (!bdev->driver->io_mem_reserve)
return 0;
- mem->bus.addr = NULL;
- mem->bus.offset = 0;
- mem->bus.base = 0;
- mem->bus.is_iomem = false;
-retry:
- ret = bdev->driver->io_mem_reserve(bdev, mem);
- if (ret == -ENOSPC) {
- ret = ttm_mem_io_evict(man);
- if (ret == 0)
- goto retry;
- }
- return ret;
+ return bdev->driver->io_mem_reserve(bdev, mem);
}
void ttm_mem_io_free(struct ttm_bo_device *bdev,
struct ttm_resource *mem)
{
- if (--mem->bus.io_reserved_count)
- return;
-
- if (!bdev->driver->io_mem_free)
+ if (!mem->bus.base && !mem->bus.offset && !mem->bus.addr)
return;
- bdev->driver->io_mem_free(bdev, mem);
-}
-
-int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
-{
- struct ttm_resource_manager *man = ttm_manager_type(bo->bdev, bo->mem.mem_type);
- struct ttm_resource *mem = &bo->mem;
- int ret;
-
- if (mem->bus.io_reserved_vm)
- return 0;
-
- ret = ttm_mem_io_reserve(bo->bdev, mem);
- if (unlikely(ret != 0))
- return ret;
- mem->bus.io_reserved_vm = true;
- if (man->use_io_reserve_lru)
- list_add_tail(&bo->io_reserve_lru,
- &man->io_reserve_lru);
- return 0;
-}
-
-void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
-{
- struct ttm_resource *mem = &bo->mem;
-
- if (!mem->bus.io_reserved_vm)
- return;
+ if (bdev->driver->io_mem_free)
+ bdev->driver->io_mem_free(bdev, mem);
- mem->bus.io_reserved_vm = false;
- list_del_init(&bo->io_reserve_lru);
- ttm_mem_io_free(bo->bdev, mem);
+ mem->bus.base = 0;
+ mem->bus.offset = 0;
+ mem->bus.addr = NULL;
}
static int ttm_resource_ioremap(struct ttm_bo_device *bdev,
struct ttm_resource *mem,
void **virtual)
{
- struct ttm_resource_manager *man = ttm_manager_type(bdev, mem->mem_type);
int ret;
void *addr;
*virtual = NULL;
- (void) ttm_mem_io_lock(man, false);
ret = ttm_mem_io_reserve(bdev, mem);
- ttm_mem_io_unlock(man);
if (ret || !mem->bus.is_iomem)
return ret;
addr = ioremap(mem->bus.base + mem->bus.offset,
bus_size);
if (!addr) {
- (void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(bdev, mem);
- ttm_mem_io_unlock(man);
return -ENOMEM;
}
}
struct ttm_resource *mem,
void *virtual)
{
- struct ttm_resource_manager *man;
-
- man = ttm_manager_type(bdev, mem->mem_type);
-
if (virtual && mem->bus.addr == NULL)
iounmap(virtual);
- (void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(bdev, mem);
- ttm_mem_io_unlock(man);
}
static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
INIT_LIST_HEAD(&fbo->base.ddestroy);
INIT_LIST_HEAD(&fbo->base.lru);
INIT_LIST_HEAD(&fbo->base.swap);
- INIT_LIST_HEAD(&fbo->base.io_reserve_lru);
fbo->base.moving = NULL;
drm_vma_node_reset(&fbo->base.base.vma_node);
unsigned long start_page, unsigned long num_pages,
struct ttm_bo_kmap_obj *map)
{
- struct ttm_resource_manager *man =
- ttm_manager_type(bo->bdev, bo->mem.mem_type);
unsigned long offset, size;
int ret;
if (start_page > bo->num_pages)
return -EINVAL;
- (void) ttm_mem_io_lock(man, false);
ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
- ttm_mem_io_unlock(man);
if (ret)
return ret;
if (!bo->mem.bus.is_iomem) {
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
{
- struct ttm_buffer_object *bo = map->bo;
- struct ttm_resource_manager *man =
- ttm_manager_type(bo->bdev, bo->mem.mem_type);
-
if (!map->virtual)
return;
switch (map->bo_kmap_type) {
default:
BUG();
}
- (void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
- ttm_mem_io_unlock(man);
map->virtual = NULL;
map->page = NULL;
}
pgoff_t i;
vm_fault_t ret = VM_FAULT_NOPAGE;
unsigned long address = vmf->address;
- struct ttm_resource_manager *man =
- ttm_manager_type(bdev, bo->mem.mem_type);
/*
* Refuse to fault imported pages. This should be handled
if (unlikely(ret != 0))
return ret;
- err = ttm_mem_io_lock(man, true);
+ err = ttm_mem_io_reserve(bdev, &bo->mem);
if (unlikely(err != 0))
- return VM_FAULT_NOPAGE;
- err = ttm_mem_io_reserve_vm(bo);
- if (unlikely(err != 0)) {
- ret = VM_FAULT_SIGBUS;
- goto out_io_unlock;
- }
+ return VM_FAULT_SIGBUS;
page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
vma->vm_pgoff - drm_vma_node_start(&bo->base.vma_node);
page_last = vma_pages(vma) + vma->vm_pgoff -
drm_vma_node_start(&bo->base.vma_node);
- if (unlikely(page_offset >= bo->num_pages)) {
- ret = VM_FAULT_SIGBUS;
- goto out_io_unlock;
- }
+ if (unlikely(page_offset >= bo->num_pages))
+ return VM_FAULT_SIGBUS;
prot = ttm_io_prot(bo->mem.placement, prot);
if (!bo->mem.bus.is_iomem) {
};
ttm = bo->ttm;
- if (ttm_tt_populate(bo->ttm, &ctx)) {
- ret = VM_FAULT_OOM;
- goto out_io_unlock;
- }
+ if (ttm_tt_populate(bo->ttm, &ctx))
+ return VM_FAULT_OOM;
} else {
/* Iomem should not be marked encrypted */
prot = pgprot_decrypted(prot);
}
/* We don't prefault on huge faults. Yet. */
- if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && fault_page_size != 1) {
- ret = ttm_bo_vm_insert_huge(vmf, bo, page_offset,
- fault_page_size, prot);
- goto out_io_unlock;
- }
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && fault_page_size != 1)
+ return ttm_bo_vm_insert_huge(vmf, bo, page_offset,
+ fault_page_size, prot);
/*
* Speculatively prefault a number of pages. Only error on
} else {
page = ttm->pages[page_offset];
if (unlikely(!page && i == 0)) {
- ret = VM_FAULT_OOM;
- goto out_io_unlock;
+ return VM_FAULT_OOM;
} else if (unlikely(!page)) {
break;
}
/* Never error on prefaulted PTEs */
if (unlikely((ret & VM_FAULT_ERROR))) {
if (i == 0)
- goto out_io_unlock;
+ return VM_FAULT_NOPAGE;
else
break;
}
if (unlikely(++page_offset >= page_last))
break;
}
- ret = VM_FAULT_NOPAGE;
-out_io_unlock:
- ttm_mem_io_unlock(man);
return ret;
}
EXPORT_SYMBOL(ttm_bo_vm_fault_reserved);
{
unsigned i;
- man->use_io_reserve_lru = false;
- mutex_init(&man->io_reserve_mutex);
spin_lock_init(&man->move_lock);
- INIT_LIST_HEAD(&man->io_reserve_lru);
man->size = p_size;
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
struct list_head lru;
struct list_head ddestroy;
struct list_head swap;
- struct list_head io_reserve_lru;
/**
* Members protected by a bo reservation.
*/
void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo);
-int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo);
-void ttm_mem_io_free_vm(struct ttm_buffer_object *bo);
-int ttm_mem_io_lock(struct ttm_resource_manager *man, bool interruptible);
-void ttm_mem_io_unlock(struct ttm_resource_manager *man);
-
/**
* ttm_bo_reserve:
*
* @default_caching: The default caching policy used for a buffer object
* placed in this memory type if the user doesn't provide one.
* @func: structure pointer implementing the range manager. See above
- * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures
- * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions
- * reserved by the TTM vm system.
- * @io_reserve_lru: Optional lru list for unreserving io mem regions.
* @move_lock: lock for move fence
* static information. bdev::driver::io_mem_free is never used.
* @lru: The lru list for this memory type.
uint32_t available_caching;
uint32_t default_caching;
const struct ttm_resource_manager_func *func;
- struct mutex io_reserve_mutex;
- bool use_io_reserve_lru;
spinlock_t move_lock;
/*
- * Protected by @io_reserve_mutex:
- */
-
- struct list_head io_reserve_lru;
-
- /*
* Protected by the global->lru_lock.
*/
* @base: bus base address
* @is_iomem: is this io memory ?
* @offset: offset from the base address
- * @io_reserved_vm: The VM system has a refcount in @io_reserved_count
- * @io_reserved_count: Refcounting the numbers of callers to ttm_mem_io_reserve
*
* Structure indicating the bus placement of an object.
*/
phys_addr_t base;
unsigned long offset;
bool is_iomem;
- bool io_reserved_vm;
- uint64_t io_reserved_count;
};
/**