[PATCH v3 3/4] drm/ttm: convert to unified vma offset manager
Thomas Hellstrom
thellstrom at vmware.com
Thu Jul 18 01:53:44 PDT 2013
A quick look, but not a full review:
Looks mostly good, but it looks like the TTM vm lock isn't needed at all
anymore (provided the vma offset manager is properly protected), since
kref_get_unless_zero() is used when a reference after lookup is taken.
(please see the kref_get_unless_zero documentation examples). When
drm_vma_offset_remove() is called, the kref value is unconditionally
zero, and that should block any successful lookup.
Otherwise, if the vma offset manager always needs external locking to
make lookup + referencing atomic, then perhaps locking should be completely
left to the caller?
Thanks,
Thomas
On 07/17/2013 08:14 PM, David Herrmann wrote:
> Use the new vma-manager infrastructure. This doesn't change any
> implementation details as the vma-offset-manager is nearly copied 1-to-1
> from TTM.
>
> Even though the vma-manager uses its own locks, we still need bo->vm_lock
> to prevent bos from being destroyed before we can get a reference during
> lookup. However, this lock is not needed during vm-setup as we still
> hold a reference there.
>
> This also drops the addr_space_offset member as it is a copy of vm_start
> in vma_node objects. Use the accessor functions instead.
>
> Cc: Dave Airlie <airlied at redhat.com>
> Cc: Ben Skeggs <bskeggs at redhat.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at canonical.com>
> Cc: Martin Peres <martin.peres at labri.fr>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Cc: Thomas Hellstrom <thellstrom at vmware.com>
> Signed-off-by: David Herrmann <dh.herrmann at gmail.com>
> ---
> drivers/gpu/drm/ast/ast_main.c | 2 +-
> drivers/gpu/drm/cirrus/cirrus_main.c | 2 +-
> drivers/gpu/drm/mgag200/mgag200_main.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_display.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_gem.c | 2 +-
> drivers/gpu/drm/qxl/qxl_object.h | 2 +-
> drivers/gpu/drm/qxl/qxl_release.c | 2 +-
> drivers/gpu/drm/radeon/radeon_object.h | 5 +-
> drivers/gpu/drm/ttm/ttm_bo.c | 84 ++++++-------------------------
> drivers/gpu/drm/ttm/ttm_bo_util.c | 3 +-
> drivers/gpu/drm/ttm/ttm_bo_vm.c | 81 ++++++++++++-----------------
> drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 4 +-
> include/drm/ttm/ttm_bo_api.h | 15 ++----
> include/drm/ttm/ttm_bo_driver.h | 7 +--
> 14 files changed, 65 insertions(+), 148 deletions(-)
>
> diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
> index f60fd7b..c195dc2 100644
> --- a/drivers/gpu/drm/ast/ast_main.c
> +++ b/drivers/gpu/drm/ast/ast_main.c
> @@ -487,7 +487,7 @@ void ast_gem_free_object(struct drm_gem_object *obj)
>
> static inline u64 ast_bo_mmap_offset(struct ast_bo *bo)
> {
> - return bo->bo.addr_space_offset;
> + return drm_vma_node_offset_addr(&bo->bo.vma_node);
> }
> int
> ast_dumb_mmap_offset(struct drm_file *file,
> diff --git a/drivers/gpu/drm/cirrus/cirrus_main.c b/drivers/gpu/drm/cirrus/cirrus_main.c
> index 35cbae8..3a7a0ef 100644
> --- a/drivers/gpu/drm/cirrus/cirrus_main.c
> +++ b/drivers/gpu/drm/cirrus/cirrus_main.c
> @@ -294,7 +294,7 @@ void cirrus_gem_free_object(struct drm_gem_object *obj)
>
> static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
> {
> - return bo->bo.addr_space_offset;
> + return drm_vma_node_offset_addr(&bo->bo.vma_node);
> }
>
> int
> diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
> index 9fa5685..1a75ea3 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_main.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_main.c
> @@ -349,7 +349,7 @@ void mgag200_gem_free_object(struct drm_gem_object *obj)
>
> static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
> {
> - return bo->bo.addr_space_offset;
> + return drm_vma_node_offset_addr(&bo->bo.vma_node);
> }
>
> int
> diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
> index 708b2d1..7a8caa1 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_display.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_display.c
> @@ -697,7 +697,7 @@ nouveau_display_dumb_map_offset(struct drm_file *file_priv,
> gem = drm_gem_object_lookup(dev, file_priv, handle);
> if (gem) {
> struct nouveau_bo *bo = gem->driver_private;
> - *poffset = bo->bo.addr_space_offset;
> + *poffset = drm_vma_node_offset_addr(&bo->bo.vma_node);
> drm_gem_object_unreference_unlocked(gem);
> return 0;
> }
> diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
> index e72d09c..86597eb 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_gem.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
> @@ -226,7 +226,7 @@ nouveau_gem_info(struct drm_file *file_priv, struct drm_gem_object *gem,
> }
>
> rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
> - rep->map_handle = nvbo->bo.addr_space_offset;
> + rep->map_handle = drm_vma_node_offset_addr(&nvbo->bo.vma_node);
> rep->tile_mode = nvbo->tile_mode;
> rep->tile_flags = nvbo->tile_flags;
> return 0;
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index ee7ad79..af10165 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -59,7 +59,7 @@ static inline unsigned long qxl_bo_size(struct qxl_bo *bo)
>
> static inline u64 qxl_bo_mmap_offset(struct qxl_bo *bo)
> {
> - return bo->tbo.addr_space_offset;
> + return drm_vma_node_offset_addr(&bo->tbo.vma_node);
> }
>
> static inline int qxl_bo_wait(struct qxl_bo *bo, u32 *mem_type,
> diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
> index b443d67..1a648e1 100644
> --- a/drivers/gpu/drm/qxl/qxl_release.c
> +++ b/drivers/gpu/drm/qxl/qxl_release.c
> @@ -87,7 +87,7 @@ qxl_release_free(struct qxl_device *qdev,
>
> for (i = 0 ; i < release->bo_count; ++i) {
> QXL_INFO(qdev, "release %llx\n",
> - release->bos[i]->tbo.addr_space_offset
> + drm_vma_node_offset_addr(&release->bos[i]->tbo.vma_node)
> - DRM_FILE_OFFSET);
> qxl_fence_remove_release(&release->bos[i]->fence, release->id);
> qxl_bo_unref(&release->bos[i]);
> diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h
> index 91519a5..188c682 100644
> --- a/drivers/gpu/drm/radeon/radeon_object.h
> +++ b/drivers/gpu/drm/radeon/radeon_object.h
> @@ -113,13 +113,10 @@ static inline unsigned radeon_bo_gpu_page_alignment(struct radeon_bo *bo)
> * @bo: radeon object for which we query the offset
> *
> * Returns mmap offset of the object.
> - *
> - * Note: addr_space_offset is constant after ttm bo init thus isn't protected
> - * by any lock.
> */
> static inline u64 radeon_bo_mmap_offset(struct radeon_bo *bo)
> {
> - return bo->tbo.addr_space_offset;
> + return drm_vma_node_offset_addr(&bo->tbo.vma_node);
> }
>
> extern int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type,
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index cb9dd67..245850b 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -616,11 +616,7 @@ static void ttm_bo_release(struct kref *kref)
> struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
>
> write_lock(&bdev->vm_lock);
> - if (likely(bo->vm_node != NULL)) {
> - rb_erase(&bo->vm_rb, &bdev->addr_space_rb);
> - drm_mm_put_block(bo->vm_node);
> - bo->vm_node = NULL;
> - }
> + drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
> write_unlock(&bdev->vm_lock);
> ttm_mem_io_lock(man, false);
> ttm_mem_io_free_vm(bo);
> @@ -1129,6 +1125,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
> bo->resv = &bo->ttm_resv;
> reservation_object_init(bo->resv);
> atomic_inc(&bo->glob->bo_count);
> + drm_vma_node_reset(&bo->vma_node);
>
> ret = ttm_bo_check_placement(bo, placement);
>
> @@ -1424,9 +1421,8 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
> TTM_DEBUG("Swap list was clean\n");
> spin_unlock(&glob->lru_lock);
>
> - BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
> write_lock(&bdev->vm_lock);
> - drm_mm_takedown(&bdev->addr_space_mm);
> + drm_vma_offset_manager_destroy(&bdev->vma_manager);
> write_unlock(&bdev->vm_lock);
>
> return ret;
> @@ -1454,9 +1450,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
> if (unlikely(ret != 0))
> goto out_no_sys;
>
> - bdev->addr_space_rb = RB_ROOT;
> - drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
> -
> + drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
> + 0x10000000);
> INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
> INIT_LIST_HEAD(&bdev->ddestroy);
> bdev->dev_mapping = NULL;
> @@ -1498,12 +1493,17 @@ bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
> 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;
> - loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT;
> + loff_t offset, holelen;
>
> if (!bdev->dev_mapping)
> return;
> - unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
> +
> + if (drm_vma_node_has_offset(&bo->vma_node)) {
> + offset = (loff_t) drm_vma_node_offset_addr(&bo->vma_node);
> + holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT;
> +
> + unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
> + }
> ttm_mem_io_free_vm(bo);
> }
>
> @@ -1520,31 +1520,6 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
>
> EXPORT_SYMBOL(ttm_bo_unmap_virtual);
>
> -static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
> -{
> - struct ttm_bo_device *bdev = bo->bdev;
> - struct rb_node **cur = &bdev->addr_space_rb.rb_node;
> - struct rb_node *parent = NULL;
> - struct ttm_buffer_object *cur_bo;
> - unsigned long offset = bo->vm_node->start;
> - unsigned long cur_offset;
> -
> - while (*cur) {
> - parent = *cur;
> - cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb);
> - cur_offset = cur_bo->vm_node->start;
> - if (offset < cur_offset)
> - cur = &parent->rb_left;
> - else if (offset > cur_offset)
> - cur = &parent->rb_right;
> - else
> - BUG();
> - }
> -
> - rb_link_node(&bo->vm_rb, parent, cur);
> - rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb);
> -}
> -
> /**
> * ttm_bo_setup_vm:
> *
> @@ -1559,38 +1534,9 @@ static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
> static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
> {
> struct ttm_bo_device *bdev = bo->bdev;
> - int ret;
> -
> -retry_pre_get:
> - ret = drm_mm_pre_get(&bdev->addr_space_mm);
> - if (unlikely(ret != 0))
> - return ret;
>
> - write_lock(&bdev->vm_lock);
> - bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm,
> - bo->mem.num_pages, 0, 0);
> -
> - if (unlikely(bo->vm_node == NULL)) {
> - ret = -ENOMEM;
> - goto out_unlock;
> - }
> -
> - bo->vm_node = drm_mm_get_block_atomic(bo->vm_node,
> - bo->mem.num_pages, 0);
> -
> - if (unlikely(bo->vm_node == NULL)) {
> - write_unlock(&bdev->vm_lock);
> - goto retry_pre_get;
> - }
> -
> - ttm_bo_vm_insert_rb(bo);
> - write_unlock(&bdev->vm_lock);
> - bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
> -
> - return 0;
> -out_unlock:
> - write_unlock(&bdev->vm_lock);
> - return ret;
> + return drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
> + bo->mem.num_pages);
> }
>
> int ttm_bo_wait(struct ttm_buffer_object *bo,
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index 319cf41..7cc904d 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -30,6 +30,7 @@
>
> #include <drm/ttm/ttm_bo_driver.h>
> #include <drm/ttm/ttm_placement.h>
> +#include <drm/drm_vma_manager.h>
> #include <linux/io.h>
> #include <linux/highmem.h>
> #include <linux/wait.h>
> @@ -450,7 +451,7 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
> INIT_LIST_HEAD(&fbo->lru);
> INIT_LIST_HEAD(&fbo->swap);
> INIT_LIST_HEAD(&fbo->io_reserve_lru);
> - fbo->vm_node = NULL;
> + drm_vma_node_reset(&fbo->vma_node);
> atomic_set(&fbo->cpu_writers, 0);
>
> spin_lock(&bdev->fence_lock);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> index 3df9f16..54a67f1 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> @@ -33,6 +33,7 @@
> #include <ttm/ttm_module.h>
> #include <ttm/ttm_bo_driver.h>
> #include <ttm/ttm_placement.h>
> +#include <drm/drm_vma_manager.h>
> #include <linux/mm.h>
> #include <linux/rbtree.h>
> #include <linux/module.h>
> @@ -40,37 +41,6 @@
>
> #define TTM_BO_VM_NUM_PREFAULT 16
>
> -static struct ttm_buffer_object *ttm_bo_vm_lookup_rb(struct ttm_bo_device *bdev,
> - unsigned long page_start,
> - unsigned long num_pages)
> -{
> - struct rb_node *cur = bdev->addr_space_rb.rb_node;
> - unsigned long cur_offset;
> - struct ttm_buffer_object *bo;
> - struct ttm_buffer_object *best_bo = NULL;
> -
> - while (likely(cur != NULL)) {
> - bo = rb_entry(cur, struct ttm_buffer_object, vm_rb);
> - cur_offset = bo->vm_node->start;
> - if (page_start >= cur_offset) {
> - cur = cur->rb_right;
> - best_bo = bo;
> - if (page_start == cur_offset)
> - break;
> - } else
> - cur = cur->rb_left;
> - }
> -
> - if (unlikely(best_bo == NULL))
> - return NULL;
> -
> - if (unlikely((best_bo->vm_node->start + best_bo->num_pages) <
> - (page_start + num_pages)))
> - return NULL;
> -
> - return best_bo;
> -}
> -
> static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
> {
> struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
> @@ -146,9 +116,9 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
> }
>
> page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
> - bo->vm_node->start - vma->vm_pgoff;
> + drm_vma_node_start(&bo->vma_node) - vma->vm_pgoff;
> page_last = vma_pages(vma) +
> - bo->vm_node->start - vma->vm_pgoff;
> + drm_vma_node_start(&bo->vma_node) - vma->vm_pgoff;
>
> if (unlikely(page_offset >= bo->num_pages)) {
> retval = VM_FAULT_SIGBUS;
> @@ -249,6 +219,30 @@ static const struct vm_operations_struct ttm_bo_vm_ops = {
> .close = ttm_bo_vm_close
> };
>
> +static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
> + unsigned long offset,
> + unsigned long pages)
> +{
> + struct drm_vma_offset_node *node;
> + struct ttm_buffer_object *bo = NULL;
> +
> + read_lock(&bdev->vm_lock);
> +
> + node = drm_vma_offset_lookup(&bdev->vma_manager, offset, pages);
> + if (likely(node)) {
> + bo = container_of(node, struct ttm_buffer_object, vma_node);
> + if (!kref_get_unless_zero(&bo->kref))
> + bo = NULL;
> + }
> +
> + read_unlock(&bdev->vm_lock);
> +
> + if (!bo)
> + pr_err("Could not find buffer object to map\n");
> +
> + return bo;
> +}
> +
> int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
> struct ttm_bo_device *bdev)
> {
> @@ -256,17 +250,9 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
> struct ttm_buffer_object *bo;
> int ret;
>
> - read_lock(&bdev->vm_lock);
> - bo = ttm_bo_vm_lookup_rb(bdev, vma->vm_pgoff,
> - vma_pages(vma));
> - if (likely(bo != NULL) && !kref_get_unless_zero(&bo->kref))
> - bo = NULL;
> - read_unlock(&bdev->vm_lock);
> -
> - if (unlikely(bo == NULL)) {
> - pr_err("Could not find buffer object to map\n");
> + bo = ttm_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));
> + if (unlikely(!bo))
> return -EINVAL;
> - }
>
> driver = bo->bdev->driver;
> if (unlikely(!driver->verify_access)) {
> @@ -324,12 +310,7 @@ ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
> bool no_wait = false;
> bool dummy;
>
> - read_lock(&bdev->vm_lock);
> - bo = ttm_bo_vm_lookup_rb(bdev, dev_offset, 1);
> - if (likely(bo != NULL))
> - ttm_bo_reference(bo);
> - read_unlock(&bdev->vm_lock);
> -
> + bo = ttm_bo_vm_lookup(bdev, dev_offset, 1);
> if (unlikely(bo == NULL))
> return -EFAULT;
>
> @@ -343,7 +324,7 @@ ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
> if (unlikely(ret != 0))
> goto out_unref;
>
> - kmap_offset = dev_offset - bo->vm_node->start;
> + kmap_offset = dev_offset - drm_vma_node_start(&bo->vma_node);
> if (unlikely(kmap_offset >= bo->num_pages)) {
> ret = -EFBIG;
> goto out_unref;
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> index 7953d1f..0e67cf4 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> @@ -500,7 +500,7 @@ int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
> goto out_no_dmabuf;
>
> rep->handle = handle;
> - rep->map_handle = dma_buf->base.addr_space_offset;
> + rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node);
> rep->cur_gmr_id = handle;
> rep->cur_gmr_offset = 0;
>
> @@ -834,7 +834,7 @@ int vmw_dumb_map_offset(struct drm_file *file_priv,
> if (ret != 0)
> return -EINVAL;
>
> - *offset = out_buf->base.addr_space_offset;
> + *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node);
> vmw_dmabuf_unreference(&out_buf);
> return 0;
> }
> diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
> index 8a6aa56..751eaff 100644
> --- a/include/drm/ttm/ttm_bo_api.h
> +++ b/include/drm/ttm/ttm_bo_api.h
> @@ -32,12 +32,12 @@
> #define _TTM_BO_API_H_
>
> #include <drm/drm_hashtab.h>
> +#include <drm/drm_vma_manager.h>
> #include <linux/kref.h>
> #include <linux/list.h>
> #include <linux/wait.h>
> #include <linux/mutex.h>
> #include <linux/mm.h>
> -#include <linux/rbtree.h>
> #include <linux/bitmap.h>
> #include <linux/reservation.h>
>
> @@ -145,7 +145,6 @@ struct ttm_tt;
> * @type: The bo type.
> * @destroy: Destruction function. If NULL, kfree is used.
> * @num_pages: Actual number of pages.
> - * @addr_space_offset: Address space offset.
> * @acc_size: Accounted size for this object.
> * @kref: Reference count of this buffer object. When this refcount reaches
> * zero, the object is put on the delayed delete list.
> @@ -166,8 +165,7 @@ struct ttm_tt;
> * @swap: List head for swap LRU list.
> * @sync_obj: Pointer to a synchronization object.
> * @priv_flags: Flags describing buffer object internal state.
> - * @vm_rb: Rb node for the vm rb tree.
> - * @vm_node: Address space manager node.
> + * @vma_node: Address space manager node.
> * @offset: The current GPU offset, which can have different meanings
> * depending on the memory type. For SYSTEM type memory, it should be 0.
> * @cur_placement: Hint of current placement.
> @@ -194,7 +192,6 @@ struct ttm_buffer_object {
> enum ttm_bo_type type;
> void (*destroy) (struct ttm_buffer_object *);
> unsigned long num_pages;
> - uint64_t addr_space_offset;
> size_t acc_size;
>
> /**
> @@ -238,13 +235,7 @@ struct ttm_buffer_object {
> void *sync_obj;
> unsigned long priv_flags;
>
> - /**
> - * Members protected by the bdev::vm_lock
> - */
> -
> - struct rb_node vm_rb;
> - struct drm_mm_node *vm_node;
> -
> + struct drm_vma_offset_node vma_node;
>
> /**
> * Special members that are protected by the reserve lock
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index 984fc2d..d3b8479 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -36,6 +36,7 @@
> #include <ttm/ttm_placement.h>
> #include <drm/drm_mm.h>
> #include <drm/drm_global.h>
> +#include <drm/drm_vma_manager.h>
> #include <linux/workqueue.h>
> #include <linux/fs.h>
> #include <linux/spinlock.h>
> @@ -519,7 +520,7 @@ struct ttm_bo_global {
> * @man: An array of mem_type_managers.
> * @fence_lock: Protects the synchronizing members on *all* bos belonging
> * to this device.
> - * @addr_space_mm: Range manager for the device address space.
> + * @vma_manager: Address space manager
> * lru_lock: Spinlock that protects the buffer+device lru lists and
> * ddestroy lists.
> * @val_seq: Current validation sequence.
> @@ -540,11 +541,11 @@ struct ttm_bo_device {
> rwlock_t vm_lock;
> struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
> spinlock_t fence_lock;
> +
> /*
> * Protected by the vm lock.
> */
> - struct rb_root addr_space_rb;
> - struct drm_mm addr_space_mm;
> + struct drm_vma_offset_manager vma_manager;
>
> /*
> * Protected by the global:lru lock
More information about the dri-devel
mailing list