Merge branch 'drm-ttm-unmappable' into drm-core-next

* drm-ttm-unmappable:
  drm/radeon/kms: enable use of unmappable VRAM V2
  drm/ttm: remove io_ field from TTM V6
  drm/vmwgfx: add support for new TTM fault callback V5
  drm/nouveau/kms: add support for new TTM fault callback V5
  drm/radeon/kms: add support for new fault callback V7
  drm/ttm: ttm_fault callback to allow driver to handle bo placement V6
  drm/ttm: split no_wait argument in 2 GPU or reserve wait

Conflicts:
	drivers/gpu/drm/nouveau/nouveau_bo.c

3 files changed, 114 insertions, 133 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index dd47b2a9a791..3b5b094b1397 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -79,8 +79,6 @@ static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_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);
@@ -357,7 +355,8 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
 
 static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
                                   struct ttm_mem_reg *mem,
-                                  bool evict, bool interruptible, bool no_wait)
+                                  bool evict, bool interruptible,
+                                  bool no_wait_reserve, bool no_wait_gpu)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
@@ -402,12 +401,12 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 
         if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
             !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
-                ret = ttm_bo_move_ttm(bo, evict, no_wait, mem);
+                ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem);
         else if (bdev->driver->move)
                 ret = bdev->driver->move(bo, evict, interruptible,
-                                         no_wait, mem);
+                                         no_wait_reserve, no_wait_gpu, mem);
         else
-                ret = ttm_bo_move_memcpy(bo, evict, no_wait, mem);
+                ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem);
 
         if (ret)
                 goto out_err;
@@ -606,7 +605,7 @@ void ttm_bo_unref(struct ttm_buffer_object **p_bo)
 EXPORT_SYMBOL(ttm_bo_unref);
 
 static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
-                        bool no_wait)
+                        bool no_wait_reserve, bool no_wait_gpu)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_bo_global *glob = bo->glob;
@@ -615,7 +614,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
         int ret = 0;
 
         spin_lock(&bo->lock);
-        ret = ttm_bo_wait(bo, false, interruptible, no_wait);
+        ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
         spin_unlock(&bo->lock);
 
         if (unlikely(ret != 0)) {
@@ -631,6 +630,7 @@ 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;
 
         placement.fpfn = 0;
         placement.lpfn = 0;
@@ -638,7 +638,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
         placement.num_busy_placement = 0;
         bdev->driver->evict_flags(bo, &placement);
         ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
-                                no_wait);
+                                no_wait_reserve, no_wait_gpu);
         if (ret) {
                 if (ret != -ERESTARTSYS) {
                         printk(KERN_ERR TTM_PFX
@@ -650,7 +650,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
         }
 
         ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
-                                     no_wait);
+                                     no_wait_reserve, no_wait_gpu);
         if (ret) {
                 if (ret != -ERESTARTSYS)
                         printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
@@ -670,7 +670,8 @@ out:
 
 static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
                                 uint32_t mem_type,
-                                bool interruptible, bool no_wait)
+                                bool interruptible, bool no_wait_reserve,
+                                bool no_wait_gpu)
 {
         struct ttm_bo_global *glob = bdev->glob;
         struct ttm_mem_type_manager *man = &bdev->man[mem_type];
@@ -687,11 +688,11 @@ retry:
         bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
         kref_get(&bo->list_kref);
 
-        ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
+        ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0);
 
         if (unlikely(ret == -EBUSY)) {
                 spin_unlock(&glob->lru_lock);
-                if (likely(!no_wait))
+                if (likely(!no_wait_gpu))
                         ret = ttm_bo_wait_unreserved(bo, interruptible);
 
                 kref_put(&bo->list_kref, ttm_bo_release_list);
@@ -713,7 +714,7 @@ retry:
         while (put_count--)
                 kref_put(&bo->list_kref, ttm_bo_ref_bug);
 
-        ret = ttm_bo_evict(bo, interruptible, no_wait);
+        ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu);
         ttm_bo_unreserve(bo);
 
         kref_put(&bo->list_kref, ttm_bo_release_list);
@@ -764,7 +765,9 @@ 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)
+                                        bool interruptible,
+                                        bool no_wait_reserve,
+                                        bool no_wait_gpu)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_bo_global *glob = bdev->glob;
@@ -785,7 +788,7 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
                 }
                 spin_unlock(&glob->lru_lock);
                 ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
-                                                no_wait);
+                                                no_wait_reserve, no_wait_gpu);
                 if (unlikely(ret != 0))
                         return ret;
         } while (1);
@@ -855,7 +858,8 @@ static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
 int ttm_bo_mem_space(struct ttm_buffer_object *bo,
                         struct ttm_placement *placement,
                         struct ttm_mem_reg *mem,
-                        bool interruptible, bool no_wait)
+                        bool interruptible, bool no_wait_reserve,
+                        bool no_wait_gpu)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_mem_type_manager *man;
@@ -952,7 +956,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
                 }
 
                 ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
-                                                interruptible, no_wait);
+                                                interruptible, no_wait_reserve, no_wait_gpu);
                 if (ret == 0 && mem->mm_node) {
                         mem->placement = cur_flags;
                         mem->mm_node->private = bo;
@@ -978,7 +982,8 @@ EXPORT_SYMBOL(ttm_bo_wait_cpu);
 
 int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
                         struct ttm_placement *placement,
-                        bool interruptible, bool no_wait)
+                        bool interruptible, bool no_wait_reserve,
+                        bool no_wait_gpu)
 {
         struct ttm_bo_global *glob = bo->glob;
         int ret = 0;
@@ -992,20 +997,21 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
          * instead of doing it here.
          */
         spin_lock(&bo->lock);
-        ret = ttm_bo_wait(bo, false, interruptible, no_wait);
+        ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
         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;
+        mem.bus.io_reserved = false;
         /*
          * Determine where to move the buffer.
          */
-        ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait);
+        ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu);
         if (ret)
                 goto out_unlock;
-        ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait);
+        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);
@@ -1039,7 +1045,8 @@ static int ttm_bo_mem_compat(struct ttm_placement *placement,
 
 int ttm_bo_validate(struct ttm_buffer_object *bo,
                         struct ttm_placement *placement,
-                        bool interruptible, bool no_wait)
+                        bool interruptible, bool no_wait_reserve,
+                        bool no_wait_gpu)
 {
         int ret;
 
@@ -1054,7 +1061,7 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
          */
         ret = ttm_bo_mem_compat(placement, &bo->mem);
         if (ret < 0) {
-                ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait);
+                ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu);
                 if (ret)
                         return ret;
         } else {
@@ -1153,6 +1160,7 @@ 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->buffer_start = buffer_start & PAGE_MASK;
         bo->priv_flags = 0;
         bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
@@ -1175,7 +1183,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
                         goto out_err;
         }
 
-        ret = ttm_bo_validate(bo, placement, interruptible, false);
+        ret = ttm_bo_validate(bo, placement, interruptible, false, false);
         if (ret)
                 goto out_err;
 
@@ -1249,7 +1257,7 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
         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);
+                ret = ttm_mem_evict_first(bdev, mem_type, false, false, false);
                 if (ret) {
                         if (allow_errors) {
                                 return ret;
@@ -1553,26 +1561,6 @@ bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
         return true;
 }
 
-int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
-                      struct ttm_mem_reg *mem,
-                      unsigned long *bus_base,
-                      unsigned long *bus_offset, unsigned long *bus_size)
-{
-        struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
-
-        *bus_size = 0;
-        if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
-                return -EINVAL;
-
-        if (ttm_mem_reg_is_pci(bdev, mem)) {
-                *bus_offset = mem->mm_node->start << PAGE_SHIFT;
-                *bus_size = mem->num_pages << PAGE_SHIFT;
-                *bus_base = man->io_offset;
-        }
-
-        return 0;
-}
-
 void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
 {
         struct ttm_bo_device *bdev = bo->bdev;
@@ -1581,8 +1569,8 @@ 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);
 }
 EXPORT_SYMBOL(ttm_bo_unmap_virtual);
 
@@ -1839,7 +1827,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
                 evict_mem.mem_type = TTM_PL_SYSTEM;
 
                 ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
-                                             false, false);
+                                             false, false, false);
                 if (unlikely(ret != 0))
                         goto out;
         }
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index d764e82e799b..a37a94872a14 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -50,7 +50,8 @@ void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
 }
 
 int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
-                    bool evict, bool no_wait, struct ttm_mem_reg *new_mem)
+                    bool evict, bool no_wait_reserve,
+                    bool no_wait_gpu, struct ttm_mem_reg *new_mem)
 {
         struct ttm_tt *ttm = bo->ttm;
         struct ttm_mem_reg *old_mem = &bo->mem;
@@ -81,30 +82,51 @@ int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
 }
 EXPORT_SYMBOL(ttm_bo_move_ttm);
 
+int ttm_mem_io_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+        int ret;
+
+        if (!mem->bus.io_reserved) {
+                mem->bus.io_reserved = true;
+                ret = bdev->driver->io_mem_reserve(bdev, mem);
+                if (unlikely(ret != 0))
+                        return ret;
+        }
+        return 0;
+}
+
+void ttm_mem_io_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+        if (bdev->driver->io_mem_reserve) {
+                if (mem->bus.io_reserved) {
+                        mem->bus.io_reserved = false;
+                        bdev->driver->io_mem_free(bdev, mem);
+                }
+        }
+}
+
 int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
                         void **virtual)
 {
-        struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
-        unsigned long bus_offset;
-        unsigned long bus_size;
-        unsigned long bus_base;
         int ret;
         void *addr;
 
         *virtual = NULL;
-        ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, &bus_size);
-        if (ret || bus_size == 0)
+        ret = ttm_mem_io_reserve(bdev, mem);
+        if (ret)
                 return ret;
 
-        if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
-                addr = (void *)(((u8 *) man->io_addr) + bus_offset);
-        else {
+        if (mem->bus.addr) {
+                addr = mem->bus.addr;
+        } else {
                 if (mem->placement & TTM_PL_FLAG_WC)
-                        addr = ioremap_wc(bus_base + bus_offset, bus_size);
+                        addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
                 else
-                        addr = ioremap_nocache(bus_base + bus_offset, bus_size);
-                if (!addr)
+                        addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
+                if (!addr) {
+                        ttm_mem_io_free(bdev, mem);
                         return -ENOMEM;
+                }
         }
         *virtual = addr;
         return 0;
@@ -117,8 +139,9 @@ void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
 
         man = &bdev->man[mem->mem_type];
 
-        if (virtual && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
+        if (virtual && mem->bus.addr == NULL)
                 iounmap(virtual);
+        ttm_mem_io_free(bdev, mem);
 }
 
 static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
@@ -208,7 +231,8 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
 }
 
 int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
-                       bool evict, bool no_wait, struct ttm_mem_reg *new_mem)
+                       bool evict, bool no_wait_reserve, bool no_wait_gpu,
+                       struct ttm_mem_reg *new_mem)
 {
         struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
@@ -369,26 +393,23 @@ pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
 EXPORT_SYMBOL(ttm_io_prot);
 
 static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
-                          unsigned long bus_base,
-                          unsigned long bus_offset,
-                          unsigned long bus_size,
+                          unsigned long offset,
+                          unsigned long size,
                           struct ttm_bo_kmap_obj *map)
 {
-        struct ttm_bo_device *bdev = bo->bdev;
         struct ttm_mem_reg *mem = &bo->mem;
-        struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 
-        if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) {
+        if (bo->mem.bus.addr) {
                 map->bo_kmap_type = ttm_bo_map_premapped;
-                map->virtual = (void *)(((u8 *) man->io_addr) + bus_offset);
+                map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
         } else {
                 map->bo_kmap_type = ttm_bo_map_iomap;
                 if (mem->placement & TTM_PL_FLAG_WC)
-                        map->virtual = ioremap_wc(bus_base + bus_offset,
-                                                  bus_size);
+                        map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
+                                                  size);
                 else
-                        map->virtual = ioremap_nocache(bus_base + bus_offset,
-                                                       bus_size);
+                        map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
+                                                       size);
         }
         return (!map->virtual) ? -ENOMEM : 0;
 }
@@ -441,13 +462,12 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
                 unsigned long start_page, unsigned long num_pages,
                 struct ttm_bo_kmap_obj *map)
 {
+        unsigned long offset, size;
         int ret;
-        unsigned long bus_base;
-        unsigned long bus_offset;
-        unsigned long bus_size;
 
         BUG_ON(!list_empty(&bo->swap));
         map->virtual = NULL;
+        map->bo = bo;
         if (num_pages > bo->num_pages)
                 return -EINVAL;
         if (start_page > bo->num_pages)
@@ -456,16 +476,15 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
         if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
                 return -EPERM;
 #endif
-        ret = ttm_bo_pci_offset(bo->bdev, &bo->mem, &bus_base,
-                                &bus_offset, &bus_size);
+        ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
         if (ret)
                 return ret;
-        if (bus_size == 0) {
+        if (!bo->mem.bus.is_iomem) {
                 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
         } else {
-                bus_offset += start_page << PAGE_SHIFT;
-                bus_size = num_pages << PAGE_SHIFT;
-                return ttm_bo_ioremap(bo, bus_base, bus_offset, bus_size, map);
+                offset = start_page << PAGE_SHIFT;
+                size = num_pages << PAGE_SHIFT;
+                return ttm_bo_ioremap(bo, offset, size, map);
         }
 }
 EXPORT_SYMBOL(ttm_bo_kmap);
@@ -477,6 +496,7 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
         switch (map->bo_kmap_type) {
         case ttm_bo_map_iomap:
                 iounmap(map->virtual);
+                ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
                 break;
         case ttm_bo_map_vmap:
                 vunmap(map->virtual);
@@ -494,39 +514,11 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
 }
 EXPORT_SYMBOL(ttm_bo_kunmap);
 
-int ttm_bo_pfn_prot(struct ttm_buffer_object *bo,
-                    unsigned long dst_offset,
-                    unsigned long *pfn, pgprot_t *prot)
-{
-        struct ttm_mem_reg *mem = &bo->mem;
-        struct ttm_bo_device *bdev = bo->bdev;
-        unsigned long bus_offset;
-        unsigned long bus_size;
-        unsigned long bus_base;
-        int ret;
-        ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset,
-                        &bus_size);
-        if (ret)
-                return -EINVAL;
-        if (bus_size != 0)
-                *pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT;
-        else
-                if (!bo->ttm)
-                        return -EINVAL;
-                else
-                        *pfn = page_to_pfn(ttm_tt_get_page(bo->ttm,
-                                                           dst_offset >>
-                                                           PAGE_SHIFT));
-        *prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
-                PAGE_KERNEL : ttm_io_prot(mem->placement, PAGE_KERNEL);
-
-        return 0;
-}
-
 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
                               void *sync_obj,
                               void *sync_obj_arg,
-                              bool evict, bool no_wait,
+                              bool evict, bool no_wait_reserve,
+                              bool no_wait_gpu,
                               struct ttm_mem_reg *new_mem)
 {
         struct ttm_bo_device *bdev = bo->bdev;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 668dbe8b8dd3..fe6cb77899f4 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -74,9 +74,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
         struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
             vma->vm_private_data;
         struct ttm_bo_device *bdev = bo->bdev;
-        unsigned long bus_base;
-        unsigned long bus_offset;
-        unsigned long bus_size;
         unsigned long page_offset;
         unsigned long page_last;
         unsigned long pfn;
@@ -84,7 +81,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
         struct page *page;
         int ret;
         int i;
-        bool is_iomem;
         unsigned long address = (unsigned long)vmf->virtual_address;
         int retval = VM_FAULT_NOPAGE;
 
@@ -101,8 +97,21 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
                 return VM_FAULT_NOPAGE;
         }
 
-        if (bdev->driver->fault_reserve_notify)
-                bdev->driver->fault_reserve_notify(bo);
+        if (bdev->driver->fault_reserve_notify) {
+                ret = bdev->driver->fault_reserve_notify(bo);
+                switch (ret) {
+                case 0:
+                        break;
+                case -EBUSY:
+                        set_need_resched();
+                case -ERESTARTSYS:
+                        retval = VM_FAULT_NOPAGE;
+                        goto out_unlock;
+                default:
+                        retval = VM_FAULT_SIGBUS;
+                        goto out_unlock;
+                }
+        }
 
         /*
          * Wait for buffer data in transit, due to a pipelined
@@ -122,15 +131,12 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
                 spin_unlock(&bo->lock);
 
 
-        ret = ttm_bo_pci_offset(bdev, &bo->mem, &bus_base, &bus_offset,
-                                &bus_size);
-        if (unlikely(ret != 0)) {
+        ret = ttm_mem_io_reserve(bdev, &bo->mem);
+        if (ret) {
                 retval = VM_FAULT_SIGBUS;
                 goto out_unlock;
         }
 
-        is_iomem = (bus_size != 0);
-
         page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
             bo->vm_node->start - vma->vm_pgoff;
         page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
@@ -154,8 +160,7 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
          * vma->vm_page_prot when the object changes caching policy, with
          * the correct locks held.
          */
-
-        if (is_iomem) {
+        if (bo->mem.bus.is_iomem) {
                 vma->vm_page_prot = ttm_io_prot(bo->mem.placement,
                                                 vma->vm_page_prot);
         } else {
@@ -171,10 +176,8 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
          */
 
         for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
-
-                if (is_iomem)
-                        pfn = ((bus_base + bus_offset) >> PAGE_SHIFT) +
-                            page_offset;
+                if (bo->mem.bus.is_iomem)
+                        pfn = ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT) + page_offset;
                 else {
                         page = ttm_tt_get_page(ttm, page_offset);
                         if (unlikely(!page && i == 0)) {
@@ -198,7 +201,6 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
                         retval =
                             (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
                         goto out_unlock;
-
                 }
 
                 address += PAGE_SIZE;
@@ -221,8 +223,7 @@ static void ttm_bo_vm_open(struct vm_area_struct *vma)
 
 static void ttm_bo_vm_close(struct vm_area_struct *vma)
 {
-        struct ttm_buffer_object *bo =
-            (struct ttm_buffer_object *)vma->vm_private_data;
+        struct ttm_buffer_object *bo = (struct ttm_buffer_object *)vma->vm_private_data;
 
         ttm_bo_unref(&bo);
         vma->vm_private_data = NULL;