/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
+/* Notes:
+ *
+ * We store bo pointer in drm_mm_node struct so we know which bo own a
+ * specific node. There is no protection on the pointer, thus to make
+ * sure things don't go berserk you have to access this pointer while
+ * holding the global lru lock and make sure anytime you free a node you
+ * reset the pointer to NULL.
+ */
#include "ttm/ttm_module.h"
#include "ttm/ttm_bo_driver.h"
static int ttm_bo_setup_vm(struct ttm_buffer_object *bo);
static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
+static void ttm_bo_global_kobj_release(struct kobject *kobj);
+
+static struct attribute ttm_bo_count = {
+ .name = "bo_count",
+ .mode = S_IRUGO
+};
+
+static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type)
+{
+ int i;
+
+ for (i = 0; i <= TTM_PL_PRIV5; i++)
+ if (flags & (1 << i)) {
+ *mem_type = i;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+
+ printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type);
+ printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type);
+ printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags);
+ printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset);
+ printk(KERN_ERR TTM_PFX " io_offset: 0x%08lX\n", man->io_offset);
+ printk(KERN_ERR TTM_PFX " io_size: %ld\n", man->io_size);
+ printk(KERN_ERR TTM_PFX " size: %llu\n", man->size);
+ printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n",
+ man->available_caching);
+ printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n",
+ man->default_caching);
+ if (mem_type != TTM_PL_SYSTEM) {
+ spin_lock(&bdev->glob->lru_lock);
+ drm_mm_debug_table(&man->manager, TTM_PFX);
+ spin_unlock(&bdev->glob->lru_lock);
+ }
+}
+
+static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement)
+{
+ int i, ret, mem_type;
+
+ printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n",
+ bo, bo->mem.num_pages, bo->mem.size >> 10,
+ bo->mem.size >> 20);
+ for (i = 0; i < placement->num_placement; i++) {
+ ret = ttm_mem_type_from_flags(placement->placement[i],
+ &mem_type);
+ if (ret)
+ return;
+ printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n",
+ i, placement->placement[i], mem_type);
+ ttm_mem_type_debug(bo->bdev, mem_type);
+ }
+}
+
+static ssize_t ttm_bo_global_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buffer)
+{
+ struct ttm_bo_global *glob =
+ container_of(kobj, struct ttm_bo_global, kobj);
+
+ return snprintf(buffer, PAGE_SIZE, "%lu\n",
+ (unsigned long) atomic_read(&glob->bo_count));
+}
+
+static struct attribute *ttm_bo_global_attrs[] = {
+ &ttm_bo_count,
+ NULL
+};
+
+static struct sysfs_ops ttm_bo_global_ops = {
+ .show = &ttm_bo_global_show
+};
+
+static struct kobj_type ttm_bo_glob_kobj_type = {
+ .release = &ttm_bo_global_kobj_release,
+ .sysfs_ops = &ttm_bo_global_ops,
+ .default_attrs = ttm_bo_global_attrs
+};
+
static inline uint32_t ttm_bo_type_flags(unsigned type)
{
if (bo->ttm)
ttm_tt_destroy(bo->ttm);
+ atomic_dec(&bo->glob->bo_count);
if (bo->destroy)
bo->destroy(bo);
else {
- ttm_mem_global_free(bdev->mem_glob, bo->acc_size, false);
+ ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size);
kfree(bo);
}
}
ret = wait_event_interruptible(bo->event_queue,
atomic_read(&bo->reserved) == 0);
if (unlikely(ret != 0))
- return -ERESTART;
+ return ret;
} else {
wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0);
}
return 0;
}
+EXPORT_SYMBOL(ttm_bo_wait_unreserved);
static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
{
kref_get(&bo->list_kref);
if (bo->ttm != NULL) {
- list_add_tail(&bo->swap, &bdev->swap_lru);
+ list_add_tail(&bo->swap, &bo->glob->swap_lru);
kref_get(&bo->list_kref);
}
}
bool interruptible,
bool no_wait, bool use_sequence, uint32_t sequence)
{
- struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
int ret;
while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
if (no_wait)
return -EBUSY;
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
ret = ttm_bo_wait_unreserved(bo, interruptible);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
if (unlikely(ret))
return ret;
bool interruptible,
bool no_wait, bool use_sequence, uint32_t sequence)
{
- struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
int put_count = 0;
int ret;
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence,
sequence);
if (likely(ret == 0))
put_count = ttm_bo_del_from_lru(bo);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
while (put_count--)
kref_put(&bo->list_kref, ttm_bo_ref_bug);
void ttm_bo_unreserve(struct ttm_buffer_object *bo)
{
- struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
ttm_bo_add_to_lru(bo);
atomic_set(&bo->reserved, 0);
wake_up_all(&bo->event_queue);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
}
EXPORT_SYMBOL(ttm_bo_unreserve);
/*
* Call bo->mutex locked.
*/
-
static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
{
struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
int ret = 0;
uint32_t page_flags = 0;
page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
case ttm_bo_type_kernel:
bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
- page_flags, bdev->dummy_read_page);
+ page_flags, glob->dummy_read_page);
if (unlikely(bo->ttm == NULL))
ret = -ENOMEM;
break;
case ttm_bo_type_user:
bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
page_flags | TTM_PAGE_FLAG_USER,
- bdev->dummy_read_page);
- if (unlikely(bo->ttm == NULL))
+ glob->dummy_read_page);
+ if (unlikely(bo->ttm == NULL)) {
ret = -ENOMEM;
- break;
+ break;
+ }
ret = ttm_tt_set_user(bo->ttm, current,
bo->buffer_start, bo->num_pages);
}
if (bo->mem.mem_type == TTM_PL_SYSTEM) {
-
- struct ttm_mem_reg *old_mem = &bo->mem;
- uint32_t save_flags = old_mem->placement;
-
- *old_mem = *mem;
+ bo->mem = *mem;
mem->mm_node = NULL;
- ttm_flag_masked(&save_flags, mem->placement,
- TTM_PL_MASK_MEMTYPE);
goto moved;
}
bdev->man[bo->mem.mem_type].gpu_offset;
bo->cur_placement = bo->mem.placement;
spin_unlock(&bo->lock);
- }
+ } else
+ bo->offset = 0;
return 0;
static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
{
struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
struct ttm_bo_driver *driver = bdev->driver;
int ret;
spin_unlock(&bo->lock);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
+ put_count = ttm_bo_del_from_lru(bo);
+
ret = ttm_bo_reserve_locked(bo, false, false, false, 0);
BUG_ON(ret);
if (bo->ttm)
if (!list_empty(&bo->ddestroy)) {
list_del_init(&bo->ddestroy);
- kref_put(&bo->list_kref, ttm_bo_ref_bug);
+ ++put_count;
}
if (bo->mem.mm_node) {
+ bo->mem.mm_node->private = NULL;
drm_mm_put_block(bo->mem.mm_node);
bo->mem.mm_node = NULL;
}
- put_count = ttm_bo_del_from_lru(bo);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
atomic_set(&bo->reserved, 0);
while (put_count--)
- kref_put(&bo->list_kref, ttm_bo_release_list);
+ kref_put(&bo->list_kref, ttm_bo_ref_bug);
return 0;
}
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
if (list_empty(&bo->ddestroy)) {
void *sync_obj = bo->sync_obj;
void *sync_obj_arg = bo->sync_obj_arg;
kref_get(&bo->list_kref);
list_add_tail(&bo->ddestroy, &bdev->ddestroy);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
spin_unlock(&bo->lock);
if (sync_obj)
ret = 0;
} else {
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
spin_unlock(&bo->lock);
ret = -EBUSY;
}
static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
{
+ struct ttm_bo_global *glob = bdev->glob;
struct ttm_buffer_object *entry, *nentry;
struct list_head *list, *next;
int ret;
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
list_for_each_safe(list, next, &bdev->ddestroy) {
entry = list_entry(list, struct ttm_buffer_object, ddestroy);
nentry = NULL;
}
kref_get(&entry->list_kref);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
ret = ttm_bo_cleanup_refs(entry, remove_all);
kref_put(&entry->list_kref, ttm_bo_release_list);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
if (nentry) {
bool next_onlist = !list_empty(next);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
kref_put(&nentry->list_kref, ttm_bo_release_list);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
/*
* Someone might have raced us and removed the
* next entry from the list. We don't bother restarting
break;
}
ret = !list_empty(&bdev->ddestroy);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
return ret;
}
}
EXPORT_SYMBOL(ttm_bo_unref);
-static int ttm_bo_evict(struct ttm_buffer_object *bo, unsigned mem_type,
- bool interruptible, bool no_wait)
+static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
+ bool no_wait)
{
- int ret = 0;
struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
struct ttm_mem_reg evict_mem;
- uint32_t proposed_placement;
-
- if (bo->mem.mem_type != mem_type)
- goto out;
+ struct ttm_placement placement;
+ int ret = 0;
spin_lock(&bo->lock);
ret = ttm_bo_wait(bo, false, interruptible, no_wait);
spin_unlock(&bo->lock);
if (unlikely(ret != 0)) {
- if (ret != -ERESTART) {
+ if (ret != -ERESTARTSYS) {
printk(KERN_ERR TTM_PFX
"Failed to expire sync object before "
"buffer eviction.\n");
evict_mem = bo->mem;
evict_mem.mm_node = NULL;
- proposed_placement = bdev->driver->evict_flags(bo);
-
- ret = ttm_bo_mem_space(bo, proposed_placement,
- &evict_mem, interruptible, no_wait);
- if (unlikely(ret != 0 && ret != -ERESTART))
- ret = ttm_bo_mem_space(bo, TTM_PL_FLAG_SYSTEM,
- &evict_mem, interruptible, no_wait);
-
+ placement.fpfn = 0;
+ placement.lpfn = 0;
+ placement.num_placement = 0;
+ placement.num_busy_placement = 0;
+ bdev->driver->evict_flags(bo, &placement);
+ ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
+ no_wait);
if (ret) {
- if (ret != -ERESTART)
+ if (ret != -ERESTARTSYS) {
printk(KERN_ERR TTM_PFX
"Failed to find memory space for "
"buffer 0x%p eviction.\n", bo);
+ ttm_bo_mem_space_debug(bo, &placement);
+ }
goto out;
}
ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
no_wait);
if (ret) {
- if (ret != -ERESTART)
+ if (ret != -ERESTARTSYS)
printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
+ spin_lock(&glob->lru_lock);
+ if (evict_mem.mm_node) {
+ evict_mem.mm_node->private = NULL;
+ drm_mm_put_block(evict_mem.mm_node);
+ evict_mem.mm_node = NULL;
+ }
+ spin_unlock(&glob->lru_lock);
goto out;
}
-
- spin_lock(&bdev->lru_lock);
- if (evict_mem.mm_node) {
- drm_mm_put_block(evict_mem.mm_node);
- evict_mem.mm_node = NULL;
- }
- spin_unlock(&bdev->lru_lock);
bo->evicted = true;
out:
return ret;
}
-/**
- * Repeatedly evict memory from the LRU for @mem_type until we create enough
- * space, or we've evicted everything and there isn't enough space.
- */
-static int ttm_bo_mem_force_space(struct ttm_bo_device *bdev,
- struct ttm_mem_reg *mem,
- uint32_t mem_type,
- bool interruptible, bool no_wait)
+static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
+ uint32_t mem_type,
+ bool interruptible, bool no_wait)
{
- struct drm_mm_node *node;
- struct ttm_buffer_object *entry;
+ struct ttm_bo_global *glob = bdev->glob;
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
- struct list_head *lru;
- unsigned long num_pages = mem->num_pages;
- int put_count = 0;
- int ret;
-
-retry_pre_get:
- ret = drm_mm_pre_get(&man->manager);
- if (unlikely(ret != 0))
- return ret;
+ struct ttm_buffer_object *bo;
+ int ret, put_count = 0;
- spin_lock(&bdev->lru_lock);
- do {
- node = drm_mm_search_free(&man->manager, num_pages,
- mem->page_alignment, 1);
- if (node)
- break;
+retry:
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&man->lru)) {
+ spin_unlock(&glob->lru_lock);
+ return -EBUSY;
+ }
- lru = &man->lru;
- if (list_empty(lru))
- break;
+ bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
+ kref_get(&bo->list_kref);
- entry = list_first_entry(lru, struct ttm_buffer_object, lru);
- kref_get(&entry->list_kref);
+ ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
- ret =
- ttm_bo_reserve_locked(entry, interruptible, no_wait,
- false, 0);
+ if (unlikely(ret == -EBUSY)) {
+ spin_unlock(&glob->lru_lock);
+ if (likely(!no_wait))
+ ret = ttm_bo_wait_unreserved(bo, interruptible);
- if (likely(ret == 0))
- put_count = ttm_bo_del_from_lru(entry);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
- spin_unlock(&bdev->lru_lock);
+ /**
+ * We *need* to retry after releasing the lru lock.
+ */
if (unlikely(ret != 0))
return ret;
+ goto retry;
+ }
- while (put_count--)
- kref_put(&entry->list_kref, ttm_bo_ref_bug);
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&glob->lru_lock);
- ret = ttm_bo_evict(entry, mem_type, interruptible, no_wait);
+ BUG_ON(ret != 0);
- ttm_bo_unreserve(entry);
+ while (put_count--)
+ kref_put(&bo->list_kref, ttm_bo_ref_bug);
- kref_put(&entry->list_kref, ttm_bo_release_list);
- if (ret)
- return ret;
+ ret = ttm_bo_evict(bo, interruptible, no_wait);
+ ttm_bo_unreserve(bo);
- spin_lock(&bdev->lru_lock);
- } while (1);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+}
- if (!node) {
- spin_unlock(&bdev->lru_lock);
- return -ENOMEM;
- }
+static int ttm_bo_man_get_node(struct ttm_buffer_object *bo,
+ struct ttm_mem_type_manager *man,
+ struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ struct drm_mm_node **node)
+{
+ struct ttm_bo_global *glob = bo->glob;
+ unsigned long lpfn;
+ int ret;
- node = drm_mm_get_block_atomic(node, num_pages, mem->page_alignment);
- if (unlikely(!node)) {
- spin_unlock(&bdev->lru_lock);
- goto retry_pre_get;
- }
+ lpfn = placement->lpfn;
+ if (!lpfn)
+ lpfn = man->size;
+ *node = NULL;
+ do {
+ ret = drm_mm_pre_get(&man->manager);
+ if (unlikely(ret))
+ return ret;
- spin_unlock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
+ *node = drm_mm_search_free_in_range(&man->manager,
+ mem->num_pages, mem->page_alignment,
+ placement->fpfn, lpfn, 1);
+ if (unlikely(*node == NULL)) {
+ spin_unlock(&glob->lru_lock);
+ return 0;
+ }
+ *node = drm_mm_get_block_atomic_range(*node, mem->num_pages,
+ mem->page_alignment,
+ placement->fpfn,
+ lpfn);
+ spin_unlock(&glob->lru_lock);
+ } while (*node == NULL);
+ return 0;
+}
+
+/**
+ * Repeatedly evict memory from the LRU for @mem_type until we create enough
+ * space, or we've evicted everything and there isn't enough space.
+ */
+static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
+ uint32_t mem_type,
+ struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ bool interruptible, bool no_wait)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct drm_mm_node *node;
+ int ret;
+
+ do {
+ ret = ttm_bo_man_get_node(bo, man, placement, mem, &node);
+ if (unlikely(ret != 0))
+ return ret;
+ if (node)
+ break;
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&man->lru)) {
+ spin_unlock(&glob->lru_lock);
+ break;
+ }
+ spin_unlock(&glob->lru_lock);
+ ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
+ no_wait);
+ if (unlikely(ret != 0))
+ return ret;
+ } while (1);
+ if (node == NULL)
+ return -ENOMEM;
mem->mm_node = node;
mem->mem_type = mem_type;
return 0;
return result;
}
-
static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
bool disallow_fixed,
uint32_t mem_type,
* space.
*/
int ttm_bo_mem_space(struct ttm_buffer_object *bo,
- uint32_t proposed_placement,
- struct ttm_mem_reg *mem,
- bool interruptible, bool no_wait)
+ struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ bool interruptible, bool no_wait)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_type_manager *man;
-
- uint32_t num_prios = bdev->driver->num_mem_type_prio;
- const uint32_t *prios = bdev->driver->mem_type_prio;
- uint32_t i;
uint32_t mem_type = TTM_PL_SYSTEM;
uint32_t cur_flags = 0;
bool type_found = false;
bool type_ok = false;
- bool has_eagain = false;
+ bool has_erestartsys = false;
struct drm_mm_node *node = NULL;
- int ret;
+ int i, ret;
mem->mm_node = NULL;
- for (i = 0; i < num_prios; ++i) {
- mem_type = prios[i];
+ for (i = 0; i < placement->num_placement; ++i) {
+ ret = ttm_mem_type_from_flags(placement->placement[i],
+ &mem_type);
+ if (ret)
+ return ret;
man = &bdev->man[mem_type];
type_ok = ttm_bo_mt_compatible(man,
- bo->type == ttm_bo_type_user,
- mem_type, proposed_placement,
- &cur_flags);
+ bo->type == ttm_bo_type_user,
+ mem_type,
+ placement->placement[i],
+ &cur_flags);
if (!type_ok)
continue;
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
cur_flags);
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the memory placement flags to the current flags
+ */
+ ttm_flag_masked(&cur_flags, placement->placement[i],
+ ~TTM_PL_MASK_MEMTYPE);
if (mem_type == TTM_PL_SYSTEM)
break;
if (man->has_type && man->use_type) {
type_found = true;
- do {
- ret = drm_mm_pre_get(&man->manager);
- if (unlikely(ret))
- return ret;
-
- spin_lock(&bdev->lru_lock);
- node = drm_mm_search_free(&man->manager,
- mem->num_pages,
- mem->page_alignment,
- 1);
- if (unlikely(!node)) {
- spin_unlock(&bdev->lru_lock);
- break;
- }
- node = drm_mm_get_block_atomic(node,
- mem->num_pages,
- mem->
- page_alignment);
- spin_unlock(&bdev->lru_lock);
- } while (!node);
+ ret = ttm_bo_man_get_node(bo, man, placement, mem,
+ &node);
+ if (unlikely(ret))
+ return ret;
}
if (node)
break;
mem->mm_node = node;
mem->mem_type = mem_type;
mem->placement = cur_flags;
+ if (node)
+ node->private = bo;
return 0;
}
if (!type_found)
return -EINVAL;
- num_prios = bdev->driver->num_mem_busy_prio;
- prios = bdev->driver->mem_busy_prio;
-
- for (i = 0; i < num_prios; ++i) {
- mem_type = prios[i];
+ for (i = 0; i < placement->num_busy_placement; ++i) {
+ ret = ttm_mem_type_from_flags(placement->busy_placement[i],
+ &mem_type);
+ if (ret)
+ return ret;
man = &bdev->man[mem_type];
-
if (!man->has_type)
continue;
-
if (!ttm_bo_mt_compatible(man,
- bo->type == ttm_bo_type_user,
- mem_type,
- proposed_placement, &cur_flags))
+ bo->type == ttm_bo_type_user,
+ mem_type,
+ placement->busy_placement[i],
+ &cur_flags))
continue;
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
cur_flags);
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the memory placement flags to the current flags
+ */
+ ttm_flag_masked(&cur_flags, placement->busy_placement[i],
+ ~TTM_PL_MASK_MEMTYPE);
- ret = ttm_bo_mem_force_space(bdev, mem, mem_type,
- interruptible, no_wait);
-
+ ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
+ interruptible, no_wait);
if (ret == 0 && mem->mm_node) {
mem->placement = cur_flags;
+ mem->mm_node->private = bo;
return 0;
}
-
- if (ret == -ERESTART)
- has_eagain = true;
+ if (ret == -ERESTARTSYS)
+ has_erestartsys = true;
}
-
- ret = (has_eagain) ? -ERESTART : -ENOMEM;
+ ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
return ret;
}
EXPORT_SYMBOL(ttm_bo_mem_space);
int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait)
{
- int ret = 0;
-
if ((atomic_read(&bo->cpu_writers) > 0) && no_wait)
return -EBUSY;
- ret = wait_event_interruptible(bo->event_queue,
- atomic_read(&bo->cpu_writers) == 0);
-
- if (ret == -ERESTARTSYS)
- ret = -ERESTART;
-
- return ret;
+ return wait_event_interruptible(bo->event_queue,
+ atomic_read(&bo->cpu_writers) == 0);
}
+EXPORT_SYMBOL(ttm_bo_wait_cpu);
int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
- uint32_t proposed_placement,
- bool interruptible, bool no_wait)
+ struct ttm_placement *placement,
+ bool interruptible, bool no_wait)
{
- struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
int ret = 0;
struct ttm_mem_reg mem;
* Have the driver move function wait for idle when necessary,
* instead of doing it here.
*/
-
spin_lock(&bo->lock);
ret = ttm_bo_wait(bo, false, interruptible, no_wait);
spin_unlock(&bo->lock);
-
if (ret)
return ret;
-
mem.num_pages = bo->num_pages;
mem.size = mem.num_pages << PAGE_SHIFT;
mem.page_alignment = bo->mem.page_alignment;
-
/*
* Determine where to move the buffer.
*/
-
- ret = ttm_bo_mem_space(bo, proposed_placement, &mem,
- interruptible, no_wait);
+ ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait);
if (ret)
goto out_unlock;
-
ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait);
-
out_unlock:
if (ret && mem.mm_node) {
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
+ mem.mm_node->private = NULL;
drm_mm_put_block(mem.mm_node);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
}
return ret;
}
-static int ttm_bo_mem_compat(uint32_t proposed_placement,
+static int ttm_bo_mem_compat(struct ttm_placement *placement,
struct ttm_mem_reg *mem)
{
- if ((proposed_placement & mem->placement & TTM_PL_MASK_MEM) == 0)
- return 0;
- if ((proposed_placement & mem->placement & TTM_PL_MASK_CACHING) == 0)
- return 0;
-
- return 1;
+ int i;
+
+ for (i = 0; i < placement->num_placement; i++) {
+ if ((placement->placement[i] & mem->placement &
+ TTM_PL_MASK_CACHING) &&
+ (placement->placement[i] & mem->placement &
+ TTM_PL_MASK_MEM))
+ return i;
+ }
+ return -1;
}
-int ttm_buffer_object_validate(struct ttm_buffer_object *bo,
- uint32_t proposed_placement,
- bool interruptible, bool no_wait)
+int ttm_bo_validate(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ bool interruptible, bool no_wait)
{
int ret;
BUG_ON(!atomic_read(&bo->reserved));
- bo->proposed_placement = proposed_placement;
-
- TTM_DEBUG("Proposed placement 0x%08lx, Old flags 0x%08lx\n",
- (unsigned long)proposed_placement,
- (unsigned long)bo->mem.placement);
-
+ /* Check that range is valid */
+ if (placement->lpfn || placement->fpfn)
+ if (placement->fpfn > placement->lpfn ||
+ (placement->lpfn - placement->fpfn) < bo->num_pages)
+ return -EINVAL;
/*
* Check whether we need to move buffer.
*/
-
- if (!ttm_bo_mem_compat(bo->proposed_placement, &bo->mem)) {
- ret = ttm_bo_move_buffer(bo, bo->proposed_placement,
- interruptible, no_wait);
- if (ret) {
- if (ret != -ERESTART)
- printk(KERN_ERR TTM_PFX
- "Failed moving buffer. "
- "Proposed placement 0x%08x\n",
- bo->proposed_placement);
- if (ret == -ENOMEM)
- printk(KERN_ERR TTM_PFX
- "Out of aperture space or "
- "DRM memory quota.\n");
+ ret = ttm_bo_mem_compat(placement, &bo->mem);
+ if (ret < 0) {
+ ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait);
+ if (ret)
return ret;
- }
+ } else {
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the compatible memory placement flags to the active flags
+ */
+ ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
+ ~TTM_PL_MASK_MEMTYPE);
}
-
/*
* We might need to add a TTM.
*/
-
if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
ret = ttm_bo_add_ttm(bo, true);
if (ret)
return ret;
}
- /*
- * Validation has succeeded, move the access and other
- * non-mapping-related flag bits from the proposed flags to
- * the active flags
- */
-
- ttm_flag_masked(&bo->mem.placement, bo->proposed_placement,
- ~TTM_PL_MASK_MEMTYPE);
-
return 0;
}
-EXPORT_SYMBOL(ttm_buffer_object_validate);
+EXPORT_SYMBOL(ttm_bo_validate);
-int
-ttm_bo_check_placement(struct ttm_buffer_object *bo,
- uint32_t set_flags, uint32_t clr_flags)
+int ttm_bo_check_placement(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement)
{
- uint32_t new_mask = set_flags | clr_flags;
-
- if ((bo->type == ttm_bo_type_user) &&
- (clr_flags & TTM_PL_FLAG_CACHED)) {
- printk(KERN_ERR TTM_PFX
- "User buffers require cache-coherent memory.\n");
- return -EINVAL;
- }
-
- if (!capable(CAP_SYS_ADMIN)) {
- if (new_mask & TTM_PL_FLAG_NO_EVICT) {
- printk(KERN_ERR TTM_PFX "Need to be root to modify"
- " NO_EVICT status.\n");
+ int i;
+
+ if (placement->fpfn || placement->lpfn) {
+ if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) {
+ printk(KERN_ERR TTM_PFX "Page number range to small "
+ "Need %lu pages, range is [%u, %u]\n",
+ bo->mem.num_pages, placement->fpfn,
+ placement->lpfn);
return -EINVAL;
}
-
- if ((clr_flags & bo->mem.placement & TTM_PL_MASK_MEMTYPE) &&
- (bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
- printk(KERN_ERR TTM_PFX
- "Incompatible memory specification"
- " for NO_EVICT buffer.\n");
- return -EINVAL;
+ }
+ for (i = 0; i < placement->num_placement; i++) {
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) {
+ printk(KERN_ERR TTM_PFX "Need to be root to "
+ "modify NO_EVICT status.\n");
+ return -EINVAL;
+ }
+ }
+ }
+ for (i = 0; i < placement->num_busy_placement; i++) {
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) {
+ printk(KERN_ERR TTM_PFX "Need to be root to "
+ "modify NO_EVICT status.\n");
+ return -EINVAL;
+ }
}
}
return 0;
}
-int ttm_buffer_object_init(struct ttm_bo_device *bdev,
- struct ttm_buffer_object *bo,
- unsigned long size,
- enum ttm_bo_type type,
- uint32_t flags,
- uint32_t page_alignment,
- unsigned long buffer_start,
- bool interruptible,
- struct file *persistant_swap_storage,
- size_t acc_size,
- void (*destroy) (struct ttm_buffer_object *))
+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 *persistant_swap_storage,
+ size_t acc_size,
+ void (*destroy) (struct ttm_buffer_object *))
{
int ret = 0;
unsigned long num_pages;
INIT_LIST_HEAD(&bo->ddestroy);
INIT_LIST_HEAD(&bo->swap);
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->seq_valid = false;
bo->persistant_swap_storage = persistant_swap_storage;
bo->acc_size = acc_size;
+ atomic_inc(&bo->glob->bo_count);
- ret = ttm_bo_check_placement(bo, flags, 0ULL);
+ ret = ttm_bo_check_placement(bo, placement);
if (unlikely(ret != 0))
goto out_err;
- /*
- * If no caching attributes are set, accept any form of caching.
- */
-
- if ((flags & TTM_PL_MASK_CACHING) == 0)
- flags |= TTM_PL_MASK_CACHING;
-
/*
* For ttm_bo_type_device buffers, allocate
* address space from the device.
*/
-
if (bo->type == ttm_bo_type_device) {
ret = ttm_bo_setup_vm(bo);
if (ret)
goto out_err;
}
- ret = ttm_buffer_object_validate(bo, flags, interruptible, false);
+ ret = ttm_bo_validate(bo, placement, interruptible, false);
if (ret)
goto out_err;
return ret;
}
-EXPORT_SYMBOL(ttm_buffer_object_init);
+EXPORT_SYMBOL(ttm_bo_init);
-static inline size_t ttm_bo_size(struct ttm_bo_device *bdev,
+static inline size_t ttm_bo_size(struct ttm_bo_global *glob,
unsigned long num_pages)
{
size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) &
PAGE_MASK;
- return bdev->ttm_bo_size + 2 * page_array_size;
+ return glob->ttm_bo_size + 2 * page_array_size;
}
-int ttm_buffer_object_create(struct ttm_bo_device *bdev,
- unsigned long size,
- enum ttm_bo_type type,
- uint32_t flags,
- uint32_t page_alignment,
- unsigned long buffer_start,
- bool interruptible,
- struct file *persistant_swap_storage,
- struct ttm_buffer_object **p_bo)
+int ttm_bo_create(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 *persistant_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;
- struct ttm_mem_global *mem_glob = bdev->mem_glob;
size_t acc_size =
- ttm_bo_size(bdev, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
- ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false, false);
+ 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, false);
+ ttm_mem_global_free(mem_glob, acc_size);
return -ENOMEM;
}
- ret = ttm_buffer_object_init(bdev, bo, size, type, flags,
- page_alignment, buffer_start,
- interruptible,
- persistant_swap_storage, acc_size, NULL);
+ ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
+ buffer_start, interruptible,
+ persistant_swap_storage, acc_size, NULL);
if (likely(ret == 0))
*p_bo = bo;
return ret;
}
-static int ttm_bo_leave_list(struct ttm_buffer_object *bo,
- uint32_t mem_type, bool allow_errors)
-{
- int ret;
-
- spin_lock(&bo->lock);
- ret = ttm_bo_wait(bo, false, false, false);
- spin_unlock(&bo->lock);
-
- if (ret && allow_errors)
- goto out;
-
- if (bo->mem.mem_type == mem_type)
- ret = ttm_bo_evict(bo, mem_type, false, false);
-
- if (ret) {
- if (allow_errors) {
- goto out;
- } else {
- ret = 0;
- printk(KERN_ERR TTM_PFX "Cleanup eviction failed\n");
- }
- }
-
-out:
- return ret;
-}
-
static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
- struct list_head *head,
- unsigned mem_type, bool allow_errors)
+ unsigned mem_type, bool allow_errors)
{
- struct ttm_buffer_object *entry;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_bo_global *glob = bdev->glob;
int ret;
- int put_count;
/*
* Can't use standard list traversal since we're unlocking.
*/
- spin_lock(&bdev->lru_lock);
-
- while (!list_empty(head)) {
- entry = list_first_entry(head, struct ttm_buffer_object, lru);
- kref_get(&entry->list_kref);
- ret = ttm_bo_reserve_locked(entry, false, false, false, 0);
- put_count = ttm_bo_del_from_lru(entry);
- spin_unlock(&bdev->lru_lock);
- while (put_count--)
- kref_put(&entry->list_kref, ttm_bo_ref_bug);
- BUG_ON(ret);
- ret = ttm_bo_leave_list(entry, mem_type, allow_errors);
- ttm_bo_unreserve(entry);
- kref_put(&entry->list_kref, ttm_bo_release_list);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
+ while (!list_empty(&man->lru)) {
+ spin_unlock(&glob->lru_lock);
+ ret = ttm_mem_evict_first(bdev, mem_type, false, false);
+ if (ret) {
+ if (allow_errors) {
+ return ret;
+ } else {
+ printk(KERN_ERR TTM_PFX
+ "Cleanup eviction failed\n");
+ }
+ }
+ spin_lock(&glob->lru_lock);
}
-
- spin_unlock(&bdev->lru_lock);
-
+ spin_unlock(&glob->lru_lock);
return 0;
}
int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
{
- struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_mem_type_manager *man;
int ret = -EINVAL;
if (mem_type >= TTM_NUM_MEM_TYPES) {
printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type);
return ret;
}
+ man = &bdev->man[mem_type];
if (!man->has_type) {
printk(KERN_ERR TTM_PFX "Trying to take down uninitialized "
ret = 0;
if (mem_type > 0) {
- ttm_bo_force_list_clean(bdev, &man->lru, mem_type, false);
+ ttm_bo_force_list_clean(bdev, mem_type, false);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
if (drm_mm_clean(&man->manager))
drm_mm_takedown(&man->manager);
else
ret = -EBUSY;
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
}
return ret;
return 0;
}
- return ttm_bo_force_list_clean(bdev, &man->lru, mem_type, true);
+ return ttm_bo_force_list_clean(bdev, mem_type, true);
}
EXPORT_SYMBOL(ttm_bo_evict_mm);
int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
- unsigned long p_offset, unsigned long p_size)
+ unsigned long p_size)
{
int ret = -EINVAL;
struct ttm_mem_type_manager *man;
type);
return ret;
}
- ret = drm_mm_init(&man->manager, p_offset, p_size);
+ ret = drm_mm_init(&man->manager, 0, p_size);
if (ret)
return ret;
}
}
EXPORT_SYMBOL(ttm_bo_init_mm);
+static void ttm_bo_global_kobj_release(struct kobject *kobj)
+{
+ struct ttm_bo_global *glob =
+ container_of(kobj, struct ttm_bo_global, kobj);
+
+ ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
+ __free_page(glob->dummy_read_page);
+ kfree(glob);
+}
+
+void ttm_bo_global_release(struct ttm_global_reference *ref)
+{
+ struct ttm_bo_global *glob = ref->object;
+
+ kobject_del(&glob->kobj);
+ kobject_put(&glob->kobj);
+}
+EXPORT_SYMBOL(ttm_bo_global_release);
+
+int ttm_bo_global_init(struct ttm_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);
+
+ kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type);
+ ret = kobject_add(&glob->kobj, 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;
+}
+EXPORT_SYMBOL(ttm_bo_global_init);
+
+
int ttm_bo_device_release(struct ttm_bo_device *bdev)
{
int ret = 0;
unsigned i = TTM_NUM_MEM_TYPES;
struct ttm_mem_type_manager *man;
+ struct ttm_bo_global *glob = bdev->glob;
while (i--) {
man = &bdev->man[i];
}
}
+ mutex_lock(&glob->device_list_mutex);
+ list_del(&bdev->device_list);
+ mutex_unlock(&glob->device_list_mutex);
+
if (!cancel_delayed_work(&bdev->wq))
flush_scheduled_work();
while (ttm_bo_delayed_delete(bdev, true))
;
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
if (list_empty(&bdev->ddestroy))
TTM_DEBUG("Delayed destroy list was clean\n");
if (list_empty(&bdev->man[0].lru))
TTM_DEBUG("Swap list was clean\n");
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
- ttm_mem_unregister_shrink(bdev->mem_glob, &bdev->shrink);
BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
write_lock(&bdev->vm_lock);
drm_mm_takedown(&bdev->addr_space_mm);
write_unlock(&bdev->vm_lock);
- __free_page(bdev->dummy_read_page);
return ret;
}
EXPORT_SYMBOL(ttm_bo_device_release);
-/*
- * This function is intended to be called on drm driver load.
- * If you decide to call it from firstopen, you must protect the call
- * from a potentially racing ttm_bo_driver_finish in lastclose.
- * (This may happen on X server restart).
- */
-
int ttm_bo_device_init(struct ttm_bo_device *bdev,
- struct ttm_mem_global *mem_glob,
- struct ttm_bo_driver *driver, uint64_t file_page_offset,
+ struct ttm_bo_global *glob,
+ struct ttm_bo_driver *driver,
+ uint64_t file_page_offset,
bool need_dma32)
{
int ret = -EINVAL;
- bdev->dummy_read_page = NULL;
rwlock_init(&bdev->vm_lock);
- spin_lock_init(&bdev->lru_lock);
-
bdev->driver = driver;
- bdev->mem_glob = mem_glob;
memset(bdev->man, 0, sizeof(bdev->man));
- bdev->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
- if (unlikely(bdev->dummy_read_page == NULL)) {
- ret = -ENOMEM;
- goto out_err0;
- }
-
/*
* Initialize the system memory buffer type.
* Other types need to be driver / IOCTL initialized.
*/
- ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0, 0);
+ ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
if (unlikely(ret != 0))
- goto out_err1;
+ goto out_no_sys;
bdev->addr_space_rb = RB_ROOT;
ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
if (unlikely(ret != 0))
- goto out_err2;
+ goto out_no_addr_mm;
INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
bdev->nice_mode = true;
INIT_LIST_HEAD(&bdev->ddestroy);
- INIT_LIST_HEAD(&bdev->swap_lru);
bdev->dev_mapping = NULL;
+ bdev->glob = glob;
bdev->need_dma32 = need_dma32;
- ttm_mem_init_shrink(&bdev->shrink, ttm_bo_swapout);
- ret = ttm_mem_register_shrink(mem_glob, &bdev->shrink);
- if (unlikely(ret != 0)) {
- printk(KERN_ERR TTM_PFX
- "Could not register buffer object swapout.\n");
- goto out_err2;
- }
-
- bdev->ttm_bo_extra_size =
- ttm_round_pot(sizeof(struct ttm_tt)) +
- ttm_round_pot(sizeof(struct ttm_backend));
- bdev->ttm_bo_size = bdev->ttm_bo_extra_size +
- ttm_round_pot(sizeof(struct ttm_buffer_object));
+ mutex_lock(&glob->device_list_mutex);
+ list_add_tail(&bdev->device_list, &glob->device_list);
+ mutex_unlock(&glob->device_list_mutex);
return 0;
-out_err2:
+out_no_addr_mm:
ttm_bo_clean_mm(bdev, 0);
-out_err1:
- __free_page(bdev->dummy_read_page);
-out_err0:
+out_no_sys:
return ret;
}
EXPORT_SYMBOL(ttm_bo_device_init);
driver->sync_obj_unref(&sync_obj);
driver->sync_obj_unref(&tmp_obj);
spin_lock(&bo->lock);
+ } else {
+ spin_unlock(&bo->lock);
+ driver->sync_obj_unref(&sync_obj);
+ spin_lock(&bo->lock);
}
}
return 0;
ret = wait_event_interruptible
(bo->event_queue, atomic_read(&bo->reserved) == 0);
if (unlikely(ret != 0))
- return -ERESTART;
+ return ret;
} else {
wait_event(bo->event_queue,
atomic_read(&bo->reserved) == 0);
ttm_bo_unreserve(bo);
return ret;
}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
{
if (atomic_dec_and_test(&bo->cpu_writers))
wake_up_all(&bo->event_queue);
}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
/**
* A buffer object shrink method that tries to swap out the first
static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
{
- struct ttm_bo_device *bdev =
- container_of(shrink, struct ttm_bo_device, shrink);
+ struct ttm_bo_global *glob =
+ container_of(shrink, struct ttm_bo_global, shrink);
struct ttm_buffer_object *bo;
int ret = -EBUSY;
int put_count;
uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
while (ret == -EBUSY) {
- if (unlikely(list_empty(&bdev->swap_lru))) {
- spin_unlock(&bdev->lru_lock);
+ if (unlikely(list_empty(&glob->swap_lru))) {
+ spin_unlock(&glob->lru_lock);
return -EBUSY;
}
- bo = list_first_entry(&bdev->swap_lru,
+ bo = list_first_entry(&glob->swap_lru,
struct ttm_buffer_object, swap);
kref_get(&bo->list_kref);
ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
if (unlikely(ret == -EBUSY)) {
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
ttm_bo_wait_unreserved(bo, false);
kref_put(&bo->list_kref, ttm_bo_release_list);
- spin_lock(&bdev->lru_lock);
+ spin_lock(&glob->lru_lock);
}
}
BUG_ON(ret != 0);
put_count = ttm_bo_del_from_lru(bo);
- spin_unlock(&bdev->lru_lock);
+ spin_unlock(&glob->lru_lock);
while (put_count--)
kref_put(&bo->list_kref, ttm_bo_ref_bug);
* anyone tries to access a ttm page.
*/
+ if (bo->bdev->driver->swap_notify)
+ bo->bdev->driver->swap_notify(bo);
+
ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage);
out:
void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
{
- while (ttm_bo_swapout(&bdev->shrink) == 0)
+ while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
;
}
+EXPORT_SYMBOL(ttm_bo_swapout_all);
Code Review / linux-2.6.git / blobdiff