Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 266 insertions, 284 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index db809e034cc4..2e618b5ac465 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -27,14 +27,6 @@
 /*
  * 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"
@@ -45,6 +37,7 @@
 #include <linux/mm.h>
 #include <linux/file.h>
 #include <linux/module.h>
+#include <asm/atomic.h>
 
 #define TTM_ASSERT_LOCKED(param)
 #define TTM_DEBUG(fmt, arg...)
@@ -84,11 +77,8 @@ static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
                 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);
-        }
+        if (mem_type != TTM_PL_SYSTEM)
+                (*man->func->debug)(man, TTM_PFX);
 }
 
 static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
@@ -169,22 +159,17 @@ static void ttm_bo_release_list(struct kref *list_kref)
 
 int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible)
 {
-
         if (interruptible) {
-                int ret = 0;
-
-                ret = wait_event_interruptible(bo->event_queue,
+                return wait_event_interruptible(bo->event_queue,
                                                atomic_read(&bo->reserved) == 0);
-                if (unlikely(ret != 0))
-                        return ret;
         } else {
                 wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0);
+                return 0;
         }
-        return 0;
 }
 EXPORT_SYMBOL(ttm_bo_wait_unreserved);
 
-static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
+void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_mem_type_manager *man;
@@ -206,11 +191,7 @@ static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
         }
 }
 
-/**
- * Call with the lru_lock held.
- */
-
-static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
+int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
 {
         int put_count = 0;
 
@@ -239,9 +220,21 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
         int ret;
 
         while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
-                if (use_sequence && bo->seq_valid &&
-                        (sequence - bo->val_seq < (1 << 31))) {
-                        return -EAGAIN;
+                /**
+                 * Deadlock avoidance for multi-bo reserving.
+                 */
+                if (use_sequence && bo->seq_valid) {
+                        /**
+                         * We've already reserved this one.
+                         */
+                        if (unlikely(sequence == bo->val_seq))
+                                return -EDEADLK;
+                        /**
+                         * Already reserved by a thread that will not back
+                         * off for us. We need to back off.
+                         */
+                        if (unlikely(sequence - bo->val_seq < (1 << 31)))
+                                return -EAGAIN;
                 }
 
                 if (no_wait)
@@ -256,6 +249,14 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
         }
 
         if (use_sequence) {
+                /**
+                 * Wake up waiters that may need to recheck for deadlock,
+                 * if we decreased the sequence number.
+                 */
+                if (unlikely((bo->val_seq - sequence < (1 << 31))
+                             || !bo->seq_valid))
+                        wake_up_all(&bo->event_queue);
+
                 bo->val_seq = sequence;
                 bo->seq_valid = true;
         } else {
@@ -271,6 +272,13 @@ static void ttm_bo_ref_bug(struct kref *list_kref)
         BUG();
 }
 
+void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
+                         bool never_free)
+{
+        kref_sub(&bo->list_kref, count,
+                 (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list);
+}
+
 int ttm_bo_reserve(struct ttm_buffer_object *bo,
                    bool interruptible,
                    bool no_wait, bool use_sequence, uint32_t sequence)
@@ -286,20 +294,24 @@ int ttm_bo_reserve(struct ttm_buffer_object *bo,
                 put_count = ttm_bo_del_from_lru(bo);
         spin_unlock(&glob->lru_lock);
 
-        while (put_count--)
-                kref_put(&bo->list_kref, ttm_bo_ref_bug);
+        ttm_bo_list_ref_sub(bo, put_count, true);
 
         return ret;
 }
 
+void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo)
+{
+        ttm_bo_add_to_lru(bo);
+        atomic_set(&bo->reserved, 0);
+        wake_up_all(&bo->event_queue);
+}
+
 void ttm_bo_unreserve(struct ttm_buffer_object *bo)
 {
         struct ttm_bo_global *glob = bo->glob;
 
         spin_lock(&glob->lru_lock);
-        ttm_bo_add_to_lru(bo);
-        atomic_set(&bo->reserved, 0);
-        wake_up_all(&bo->event_queue);
+        ttm_bo_unreserve_locked(bo);
         spin_unlock(&glob->lru_lock);
 }
 EXPORT_SYMBOL(ttm_bo_unreserve);
@@ -366,8 +378,13 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
         int ret = 0;
 
         if (old_is_pci || new_is_pci ||
-            ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0))
-                ttm_bo_unmap_virtual(bo);
+            ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
+                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);
+        }
 
         /*
          * Create and bind a ttm if required.
@@ -389,11 +406,12 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
                 }
 
                 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
+                        if (bdev->driver->move_notify)
+                                bdev->driver->move_notify(bo, mem);
                         bo->mem = *mem;
                         mem->mm_node = NULL;
                         goto moved;
                 }
-
         }
 
         if (bdev->driver->move_notify)
@@ -420,11 +438,9 @@ moved:
         }
 
         if (bo->mem.mm_node) {
-                spin_lock(&bo->lock);
-                bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
+                bo->offset = (bo->mem.start << PAGE_SHIFT) +
                     bdev->man[bo->mem.mem_type].gpu_offset;
                 bo->cur_placement = bo->mem.placement;
-                spin_unlock(&bo->lock);
         } else
                 bo->offset = 0;
 
@@ -442,135 +458,150 @@ out_err:
 }
 
 /**
- * Call bo::reserved and with the lru lock held.
+ * Call bo::reserved.
  * Will release GPU memory type usage on destruction.
- * This is the place to put in driver specific hooks.
- * Will release the bo::reserved lock and the
- * lru lock on exit.
+ * This is the place to put in driver specific hooks to release
+ * driver private resources.
+ * Will release the bo::reserved lock.
  */
 
 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
 {
-        struct ttm_bo_global *glob = bo->glob;
-
         if (bo->ttm) {
-
-                /**
-                 * Release the lru_lock, since we don't want to have
-                 * an atomic requirement on ttm_tt[unbind|destroy].
-                 */
-
-                spin_unlock(&glob->lru_lock);
                 ttm_tt_unbind(bo->ttm);
                 ttm_tt_destroy(bo->ttm);
                 bo->ttm = NULL;
-                spin_lock(&glob->lru_lock);
-        }
-
-        if (bo->mem.mm_node) {
-                drm_mm_put_block(bo->mem.mm_node);
-                bo->mem.mm_node = NULL;
         }
+        ttm_bo_mem_put(bo, &bo->mem);
 
         atomic_set(&bo->reserved, 0);
+
+        /*
+         * Make processes trying to reserve really pick it up.
+         */
+        smp_mb__after_atomic_dec();
         wake_up_all(&bo->event_queue);
-        spin_unlock(&glob->lru_lock);
 }
 
-
-/**
- * If bo idle, remove from delayed- and lru lists, and unref.
- * If not idle, and already on delayed list, do nothing.
- * If not idle, and not on delayed list, put on delayed list,
- *   up the list_kref and schedule a delayed list check.
- */
-
-static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
+static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_bo_global *glob = bo->glob;
-        struct ttm_bo_driver *driver = bdev->driver;
+        struct ttm_bo_driver *driver;
+        void *sync_obj = NULL;
+        void *sync_obj_arg;
+        int put_count;
         int ret;
 
-        spin_lock(&bo->lock);
-retry:
-        (void) ttm_bo_wait(bo, false, false, !remove_all);
-
+        spin_lock(&bdev->fence_lock);
+        (void) ttm_bo_wait(bo, false, false, true);
         if (!bo->sync_obj) {
-                int put_count;
-
-                spin_unlock(&bo->lock);
 
                 spin_lock(&glob->lru_lock);
-                ret = ttm_bo_reserve_locked(bo, false, !remove_all, false, 0);
 
                 /**
-                 * Someone else has the object reserved. Bail and retry.
+                 * Lock inversion between bo:reserve and bdev::fence_lock here,
+                 * but that's OK, since we're only trylocking.
                  */
 
-                if (unlikely(ret == -EBUSY)) {
-                        spin_unlock(&glob->lru_lock);
-                        spin_lock(&bo->lock);
-                        goto requeue;
-                }
-
-                /**
-                 * We can re-check for sync object without taking
-                 * the bo::lock since setting the sync object requires
-                 * also bo::reserved. A busy object at this point may
-                 * be caused by another thread starting an accelerated
-                 * eviction.
-                 */
+                ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
 
-                if (unlikely(bo->sync_obj)) {
-                        atomic_set(&bo->reserved, 0);
-                        wake_up_all(&bo->event_queue);
-                        spin_unlock(&glob->lru_lock);
-                        spin_lock(&bo->lock);
-                        if (remove_all)
-                                goto retry;
-                        else
-                                goto requeue;
-                }
+                if (unlikely(ret == -EBUSY))
+                        goto queue;
 
+                spin_unlock(&bdev->fence_lock);
                 put_count = ttm_bo_del_from_lru(bo);
 
-                if (!list_empty(&bo->ddestroy)) {
-                        list_del_init(&bo->ddestroy);
-                        ++put_count;
-                }
-
+                spin_unlock(&glob->lru_lock);
                 ttm_bo_cleanup_memtype_use(bo);
 
-                while (put_count--)
-                        kref_put(&bo->list_kref, ttm_bo_ref_bug);
+                ttm_bo_list_ref_sub(bo, put_count, true);
 
-                return 0;
+                return;
+        } else {
+                spin_lock(&glob->lru_lock);
+        }
+queue:
+        driver = bdev->driver;
+        if (bo->sync_obj)
+                sync_obj = driver->sync_obj_ref(bo->sync_obj);
+        sync_obj_arg = bo->sync_obj_arg;
+
+        kref_get(&bo->list_kref);
+        list_add_tail(&bo->ddestroy, &bdev->ddestroy);
+        spin_unlock(&glob->lru_lock);
+        spin_unlock(&bdev->fence_lock);
+
+        if (sync_obj) {
+                driver->sync_obj_flush(sync_obj, sync_obj_arg);
+                driver->sync_obj_unref(&sync_obj);
         }
-requeue:
+        schedule_delayed_work(&bdev->wq,
+                              ((HZ / 100) < 1) ? 1 : HZ / 100);
+}
+
+/**
+ * function ttm_bo_cleanup_refs
+ * If bo idle, remove from delayed- and lru lists, and unref.
+ * If not idle, do nothing.
+ *
+ * @interruptible         Any sleeps should occur interruptibly.
+ * @no_wait_reserve       Never wait for reserve. Return -EBUSY instead.
+ * @no_wait_gpu           Never wait for gpu. Return -EBUSY instead.
+ */
+
+static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
+                               bool interruptible,
+                               bool no_wait_reserve,
+                               bool no_wait_gpu)
+{
+        struct ttm_bo_device *bdev = bo->bdev;
+        struct ttm_bo_global *glob = bo->glob;
+        int put_count;
+        int ret = 0;
+
+retry:
+        spin_lock(&bdev->fence_lock);
+        ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
+        spin_unlock(&bdev->fence_lock);
+
+        if (unlikely(ret != 0))
+                return ret;
+
         spin_lock(&glob->lru_lock);
-        if (list_empty(&bo->ddestroy)) {
-                void *sync_obj = bo->sync_obj;
-                void *sync_obj_arg = bo->sync_obj_arg;
+        ret = ttm_bo_reserve_locked(bo, interruptible,
+                                    no_wait_reserve, false, 0);
 
-                kref_get(&bo->list_kref);
-                list_add_tail(&bo->ddestroy, &bdev->ddestroy);
+        if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) {
                 spin_unlock(&glob->lru_lock);
-                spin_unlock(&bo->lock);
+                return ret;
+        }
 
-                if (sync_obj)
-                        driver->sync_obj_flush(sync_obj, sync_obj_arg);
-                schedule_delayed_work(&bdev->wq,
-                                      ((HZ / 100) < 1) ? 1 : HZ / 100);
-                ret = 0;
+        /**
+         * We can re-check for sync object without taking
+         * the bo::lock since setting the sync object requires
+         * also bo::reserved. A busy object at this point may
+         * be caused by another thread recently starting an accelerated
+         * eviction.
+         */
 
-        } else {
+        if (unlikely(bo->sync_obj)) {
+                atomic_set(&bo->reserved, 0);
+                wake_up_all(&bo->event_queue);
                 spin_unlock(&glob->lru_lock);
-                spin_unlock(&bo->lock);
-                ret = -EBUSY;
+                goto retry;
         }
 
-        return ret;
+        put_count = ttm_bo_del_from_lru(bo);
+        list_del_init(&bo->ddestroy);
+        ++put_count;
+
+        spin_unlock(&glob->lru_lock);
+        ttm_bo_cleanup_memtype_use(bo);
+
+        ttm_bo_list_ref_sub(bo, put_count, true);
+
+        return 0;
 }
 
 /**
@@ -602,7 +633,8 @@ static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
                 }
 
                 spin_unlock(&glob->lru_lock);
-                ret = ttm_bo_cleanup_refs(entry, remove_all);
+                ret = ttm_bo_cleanup_refs(entry, false, !remove_all,
+                                          !remove_all);
                 kref_put(&entry->list_kref, ttm_bo_release_list);
                 entry = nentry;
 
@@ -638,6 +670,7 @@ static void ttm_bo_release(struct kref *kref)
         struct ttm_buffer_object *bo =
             container_of(kref, struct ttm_buffer_object, kref);
         struct ttm_bo_device *bdev = bo->bdev;
+        struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
 
         if (likely(bo->vm_node != NULL)) {
                 rb_erase(&bo->vm_rb, &bdev->addr_space_rb);
@@ -645,7 +678,10 @@ static void ttm_bo_release(struct kref *kref)
                 bo->vm_node = NULL;
         }
         write_unlock(&bdev->vm_lock);
-        ttm_bo_cleanup_refs(bo, false);
+        ttm_mem_io_lock(man, false);
+        ttm_mem_io_free_vm(bo);
+        ttm_mem_io_unlock(man);
+        ttm_bo_cleanup_refs_or_queue(bo);
         kref_put(&bo->list_kref, ttm_bo_release_list);
         write_lock(&bdev->vm_lock);
 }
@@ -680,14 +716,13 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
                         bool no_wait_reserve, bool no_wait_gpu)
 {
         struct ttm_bo_device *bdev = bo->bdev;
-        struct ttm_bo_global *glob = bo->glob;
         struct ttm_mem_reg evict_mem;
         struct ttm_placement placement;
         int ret = 0;
 
-        spin_lock(&bo->lock);
+        spin_lock(&bdev->fence_lock);
         ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
-        spin_unlock(&bo->lock);
+        spin_unlock(&bdev->fence_lock);
 
         if (unlikely(ret != 0)) {
                 if (ret != -ERESTARTSYS) {
@@ -702,7 +737,8 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
 
         evict_mem = bo->mem;
         evict_mem.mm_node = NULL;
-        evict_mem.bus.io_reserved = false;
+        evict_mem.bus.io_reserved_vm = false;
+        evict_mem.bus.io_reserved_count = 0;
 
         placement.fpfn = 0;
         placement.lpfn = 0;
@@ -726,12 +762,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
         if (ret) {
                 if (ret != -ERESTARTSYS)
                         printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
-                spin_lock(&glob->lru_lock);
-                if (evict_mem.mm_node) {
-                        drm_mm_put_block(evict_mem.mm_node);
-                        evict_mem.mm_node = NULL;
-                }
-                spin_unlock(&glob->lru_lock);
+                ttm_bo_mem_put(bo, &evict_mem);
                 goto out;
         }
         bo->evicted = true;
@@ -759,6 +790,18 @@ retry:
         bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
         kref_get(&bo->list_kref);
 
+        if (!list_empty(&bo->ddestroy)) {
+                spin_unlock(&glob->lru_lock);
+                ret = ttm_bo_cleanup_refs(bo, interruptible,
+                                          no_wait_reserve, no_wait_gpu);
+                kref_put(&bo->list_kref, ttm_bo_release_list);
+
+                if (likely(ret == 0 || ret == -ERESTARTSYS))
+                        return ret;
+
+                goto retry;
+        }
+
         ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0);
 
         if (unlikely(ret == -EBUSY)) {
@@ -782,8 +825,7 @@ retry:
 
         BUG_ON(ret != 0);
 
-        while (put_count--)
-                kref_put(&bo->list_kref, ttm_bo_ref_bug);
+        ttm_bo_list_ref_sub(bo, put_count, true);
 
         ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu);
         ttm_bo_unreserve(bo);
@@ -792,41 +834,14 @@ retry:
         return ret;
 }
 
-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)
+void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
 {
-        struct ttm_bo_global *glob = bo->glob;
-        unsigned long lpfn;
-        int ret;
-
-        lpfn = placement->lpfn;
-        if (!lpfn)
-                lpfn = man->size;
-        *node = NULL;
-        do {
-                ret = drm_mm_pre_get(&man->manager);
-                if (unlikely(ret))
-                        return ret;
+        struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
 
-                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;
+        if (mem->mm_node)
+                (*man->func->put_node)(man, mem);
 }
+EXPORT_SYMBOL(ttm_bo_mem_put);
 
 /**
  * Repeatedly evict memory from the LRU for @mem_type until we create enough
@@ -841,31 +856,22 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
                                         bool no_wait_gpu)
 {
         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);
+                ret = (*man->func->get_node)(man, bo, placement, mem);
                 if (unlikely(ret != 0))
                         return ret;
-                if (node)
-                        break;
-                spin_lock(&glob->lru_lock);
-                if (list_empty(&man->lru)) {
-                        spin_unlock(&glob->lru_lock);
+                if (mem->mm_node)
                         break;
-                }
-                spin_unlock(&glob->lru_lock);
                 ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
                                                 no_wait_reserve, no_wait_gpu);
                 if (unlikely(ret != 0))
                         return ret;
         } while (1);
-        if (node == NULL)
+        if (mem->mm_node == NULL)
                 return -ENOMEM;
-        mem->mm_node = node;
         mem->mem_type = mem_type;
         return 0;
 }
@@ -939,7 +945,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
         bool type_found = false;
         bool type_ok = false;
         bool has_erestartsys = false;
-        struct drm_mm_node *node = NULL;
         int i, ret;
 
         mem->mm_node = NULL;
@@ -973,17 +978,15 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 
                 if (man->has_type && man->use_type) {
                         type_found = true;
-                        ret = ttm_bo_man_get_node(bo, man, placement, mem,
-                                                        &node);
+                        ret = (*man->func->get_node)(man, bo, placement, mem);
                         if (unlikely(ret))
                                 return ret;
                 }
-                if (node)
+                if (mem->mm_node)
                         break;
         }
 
-        if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) {
-                mem->mm_node = node;
+        if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
                 mem->mem_type = mem_type;
                 mem->placement = cur_flags;
                 return 0;
@@ -1053,9 +1056,9 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
                         bool interruptible, bool no_wait_reserve,
                         bool no_wait_gpu)
 {
-        struct ttm_bo_global *glob = bo->glob;
         int ret = 0;
         struct ttm_mem_reg mem;
+        struct ttm_bo_device *bdev = bo->bdev;
 
         BUG_ON(!atomic_read(&bo->reserved));
 
@@ -1064,15 +1067,16 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
          * Have the driver move function wait for idle when necessary,
          * instead of doing it here.
          */
-        spin_lock(&bo->lock);
+        spin_lock(&bdev->fence_lock);
         ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
-        spin_unlock(&bo->lock);
+        spin_unlock(&bdev->fence_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;
-        mem.bus.io_reserved = false;
+        mem.bus.io_reserved_vm = false;
+        mem.bus.io_reserved_count = 0;
         /*
          * Determine where to move the buffer.
          */
@@ -1081,11 +1085,8 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
                 goto out_unlock;
         ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu);
 out_unlock:
-        if (ret && mem.mm_node) {
-                spin_lock(&glob->lru_lock);
-                drm_mm_put_block(mem.mm_node);
-                spin_unlock(&glob->lru_lock);
-        }
+        if (ret && mem.mm_node)
+                ttm_bo_mem_put(bo, &mem);
         return ret;
 }
 
@@ -1093,11 +1094,10 @@ static int ttm_bo_mem_compat(struct ttm_placement *placement,
                              struct ttm_mem_reg *mem)
 {
         int i;
-        struct drm_mm_node *node = mem->mm_node;
 
-        if (node && placement->lpfn != 0 &&
-            (node->start < placement->fpfn ||
-             node->start + node->size > placement->lpfn))
+        if (mem->mm_node && placement->lpfn != 0 &&
+            (mem->start < placement->fpfn ||
+             mem->start + mem->num_pages > placement->lpfn))
                 return -1;
 
         for (i = 0; i < placement->num_placement; i++) {
@@ -1154,35 +1154,9 @@ EXPORT_SYMBOL(ttm_bo_validate);
 int ttm_bo_check_placement(struct ttm_buffer_object *bo,
                                 struct ttm_placement *placement)
 {
-        int i;
+        BUG_ON((placement->fpfn || placement->lpfn) &&
+               (bo->mem.num_pages > (placement->lpfn - placement->fpfn)));
 
-        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;
-                }
-        }
-        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;
 }
 
@@ -1194,7 +1168,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
                 uint32_t page_alignment,
                 unsigned long buffer_start,
                 bool interruptible,
-                struct file *persistant_swap_storage,
+                struct file *persistent_swap_storage,
                 size_t acc_size,
                 void (*destroy) (struct ttm_buffer_object *))
 {
@@ -1205,11 +1179,14 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
         num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
         if (num_pages == 0) {
                 printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n");
+                if (destroy)
+                        (*destroy)(bo);
+                else
+                        kfree(bo);
                 return -EINVAL;
         }
         bo->destroy = destroy;
 
-        spin_lock_init(&bo->lock);
         kref_init(&bo->kref);
         kref_init(&bo->list_kref);
         atomic_set(&bo->cpu_writers, 0);
@@ -1218,6 +1195,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
         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;
@@ -1227,12 +1205,13 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
         bo->mem.num_pages = bo->num_pages;
         bo->mem.mm_node = NULL;
         bo->mem.page_alignment = page_alignment;
-        bo->mem.bus.io_reserved = false;
+        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->persistant_swap_storage = persistant_swap_storage;
+        bo->persistent_swap_storage = persistent_swap_storage;
         bo->acc_size = acc_size;
         atomic_inc(&bo->glob->bo_count);
 
@@ -1281,7 +1260,7 @@ int ttm_bo_create(struct ttm_bo_device *bdev,
                         uint32_t page_alignment,
                         unsigned long buffer_start,
                         bool interruptible,
-                        struct file *persistant_swap_storage,
+                        struct file *persistent_swap_storage,
                         struct ttm_buffer_object **p_bo)
 {
         struct ttm_buffer_object *bo;
@@ -1303,7 +1282,7 @@ int ttm_bo_create(struct ttm_bo_device *bdev,
 
         ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
                                 buffer_start, interruptible,
-                                persistant_swap_storage, acc_size, NULL);
+                                persistent_swap_storage, acc_size, NULL);
         if (likely(ret == 0))
                 *p_bo = bo;
 
@@ -1341,7 +1320,6 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
 
 int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
 {
-        struct ttm_bo_global *glob = bdev->glob;
         struct ttm_mem_type_manager *man;
         int ret = -EINVAL;
 
@@ -1364,13 +1342,7 @@ int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
         if (mem_type > 0) {
                 ttm_bo_force_list_clean(bdev, mem_type, false);
 
-                spin_lock(&glob->lru_lock);
-                if (drm_mm_clean(&man->manager))
-                        drm_mm_takedown(&man->manager);
-                else
-                        ret = -EBUSY;
-
-                spin_unlock(&glob->lru_lock);
+                ret = (*man->func->takedown)(man);
         }
 
         return ret;
@@ -1405,32 +1377,22 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
         int ret = -EINVAL;
         struct ttm_mem_type_manager *man;
 
-        if (type >= TTM_NUM_MEM_TYPES) {
-                printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type);
-                return ret;
-        }
-
+        BUG_ON(type >= TTM_NUM_MEM_TYPES);
         man = &bdev->man[type];
-        if (man->has_type) {
-                printk(KERN_ERR TTM_PFX
-                       "Memory manager already initialized for type %d\n",
-                       type);
-                return ret;
-        }
+        BUG_ON(man->has_type);
+        man->io_reserve_fastpath = true;
+        man->use_io_reserve_lru = false;
+        mutex_init(&man->io_reserve_mutex);
+        INIT_LIST_HEAD(&man->io_reserve_lru);
 
         ret = bdev->driver->init_mem_type(bdev, type, man);
         if (ret)
                 return ret;
+        man->bdev = bdev;
 
         ret = 0;
         if (type != TTM_PL_SYSTEM) {
-                if (!p_size) {
-                        printk(KERN_ERR TTM_PFX
-                               "Zero size memory manager type %d\n",
-                               type);
-                        return ret;
-                }
-                ret = drm_mm_init(&man->manager, 0, p_size);
+                ret = (*man->func->init)(man, p_size);
                 if (ret)
                         return ret;
         }
@@ -1539,8 +1501,7 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
         list_del(&bdev->device_list);
         mutex_unlock(&glob->device_list_mutex);
 
-        if (!cancel_delayed_work(&bdev->wq))
-                flush_scheduled_work();
+        cancel_delayed_work_sync(&bdev->wq);
 
         while (ttm_bo_delayed_delete(bdev, true))
                 ;
@@ -1594,7 +1555,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
         bdev->dev_mapping = NULL;
         bdev->glob = glob;
         bdev->need_dma32 = need_dma32;
-
+        bdev->val_seq = 0;
+        spin_lock_init(&bdev->fence_lock);
         mutex_lock(&glob->device_list_mutex);
         list_add_tail(&bdev->device_list, &glob->device_list);
         mutex_unlock(&glob->device_list_mutex);
@@ -1628,7 +1590,7 @@ bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
         return true;
 }
 
-void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
+void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         loff_t offset = (loff_t) bo->addr_space_offset;
@@ -1637,8 +1599,20 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
         if (!bdev->dev_mapping)
                 return;
         unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
-        ttm_mem_io_free(bdev, &bo->mem);
+        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_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
+
+        ttm_mem_io_lock(man, false);
+        ttm_bo_unmap_virtual_locked(bo);
+        ttm_mem_io_unlock(man);
 }
+
+
 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
 
 static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
@@ -1718,6 +1692,7 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
                 bool lazy, bool interruptible, bool no_wait)
 {
         struct ttm_bo_driver *driver = bo->bdev->driver;
+        struct ttm_bo_device *bdev = bo->bdev;
         void *sync_obj;
         void *sync_obj_arg;
         int ret = 0;
@@ -1731,9 +1706,9 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
                         void *tmp_obj = bo->sync_obj;
                         bo->sync_obj = NULL;
                         clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
-                        spin_unlock(&bo->lock);
+                        spin_unlock(&bdev->fence_lock);
                         driver->sync_obj_unref(&tmp_obj);
-                        spin_lock(&bo->lock);
+                        spin_lock(&bdev->fence_lock);
                         continue;
                 }
 
@@ -1742,29 +1717,29 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
 
                 sync_obj = driver->sync_obj_ref(bo->sync_obj);
                 sync_obj_arg = bo->sync_obj_arg;
-                spin_unlock(&bo->lock);
+                spin_unlock(&bdev->fence_lock);
                 ret = driver->sync_obj_wait(sync_obj, sync_obj_arg,
                                             lazy, interruptible);
                 if (unlikely(ret != 0)) {
                         driver->sync_obj_unref(&sync_obj);
-                        spin_lock(&bo->lock);
+                        spin_lock(&bdev->fence_lock);
                         return ret;
                 }
-                spin_lock(&bo->lock);
+                spin_lock(&bdev->fence_lock);
                 if (likely(bo->sync_obj == sync_obj &&
                            bo->sync_obj_arg == sync_obj_arg)) {
                         void *tmp_obj = bo->sync_obj;
                         bo->sync_obj = NULL;
                         clear_bit(TTM_BO_PRIV_FLAG_MOVING,
                                   &bo->priv_flags);
-                        spin_unlock(&bo->lock);
+                        spin_unlock(&bdev->fence_lock);
                         driver->sync_obj_unref(&sync_obj);
                         driver->sync_obj_unref(&tmp_obj);
-                        spin_lock(&bo->lock);
+                        spin_lock(&bdev->fence_lock);
                 } else {
-                        spin_unlock(&bo->lock);
+                        spin_unlock(&bdev->fence_lock);
                         driver->sync_obj_unref(&sync_obj);
-                        spin_lock(&bo->lock);
+                        spin_lock(&bdev->fence_lock);
                 }
         }
         return 0;
@@ -1773,6 +1748,7 @@ EXPORT_SYMBOL(ttm_bo_wait);
 
 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
 {
+        struct ttm_bo_device *bdev = bo->bdev;
         int ret = 0;
 
         /*
@@ -1782,9 +1758,9 @@ int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
         ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
         if (unlikely(ret != 0))
                 return ret;
-        spin_lock(&bo->lock);
+        spin_lock(&bdev->fence_lock);
         ret = ttm_bo_wait(bo, false, true, no_wait);
-        spin_unlock(&bo->lock);
+        spin_unlock(&bdev->fence_lock);
         if (likely(ret == 0))
                 atomic_inc(&bo->cpu_writers);
         ttm_bo_unreserve(bo);
@@ -1824,6 +1800,13 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
                                       struct ttm_buffer_object, swap);
                 kref_get(&bo->list_kref);
 
+                if (!list_empty(&bo->ddestroy)) {
+                        spin_unlock(&glob->lru_lock);
+                        (void) ttm_bo_cleanup_refs(bo, false, false, false);
+                        kref_put(&bo->list_kref, ttm_bo_release_list);
+                        continue;
+                }
+
                 /**
                  * Reserve buffer. Since we unlock while sleeping, we need
                  * to re-check that nobody removed us from the swap-list while
@@ -1843,16 +1826,15 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
         put_count = ttm_bo_del_from_lru(bo);
         spin_unlock(&glob->lru_lock);
 
-        while (put_count--)
-                kref_put(&bo->list_kref, ttm_bo_ref_bug);
+        ttm_bo_list_ref_sub(bo, put_count, true);
 
         /**
          * Wait for GPU, then move to system cached.
          */
 
-        spin_lock(&bo->lock);
+        spin_lock(&bo->bdev->fence_lock);
         ret = ttm_bo_wait(bo, false, false, false);
-        spin_unlock(&bo->lock);
+        spin_unlock(&bo->bdev->fence_lock);
 
         if (unlikely(ret != 0))
                 goto out;
@@ -1881,7 +1863,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
         if (bo->bdev->driver->swap_notify)
                 bo->bdev->driver->swap_notify(bo);
 
-        ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage);
+        ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage);
 out:
 
         /**