On Tue, 2009-12-08 at 15:33 +0100, Jerome Glisse wrote:
> This change allow driver to pass sorted memory placement,
> from most prefered placement to least prefered placement.
> In order to avoid long function prototype a structure is
> used to gather memory placement informations such as range
> restriction (if you need a buffer to be in given range).
> Range restriction is determined by fpfn & lpfn which are
> the first page and last page number btw which allocation
> can happen. If those fields are set to 0 ttm will assume
> buffer can be put anywhere in the address space (thus it
> avoids putting a burden on the driver to always properly
> set those fields).
>
> This patch also factor few functions like evicting first
> entry of lru list or getting a memory space. This avoid
> code duplication.
>
> V2: Change API to use placement flags and array instead
> of packing placement order into a quadword.
> V3: Make sure we set the appropriate mem.placement flag
> when validating or allocation memory space.
A way to pass fpfn/lpfn to ttm_buffer_object_{init,create}() would be
really useful too. Perhaps passing a struct ttm_placement rather than
flags to these functions?
Ben.
>
> Signed-off-by: Jerome Glisse <jgli...@redhat.com>
> ---
> drivers/gpu/drm/ttm/ttm_bo.c | 463
> +++++++++++++++++++--------------------
> include/drm/ttm/ttm_bo_api.h | 42 +++-
> include/drm/ttm/ttm_bo_driver.h | 20 +--
> 3 files changed, 256 insertions(+), 269 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 87c0625..9476bde 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -27,6 +27,14 @@
> /*
> * 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"
> @@ -247,7 +255,6 @@ 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;
> @@ -328,14 +335,8 @@ static int ttm_bo_handle_move_mem(struct
> ttm_buffer_object *bo,
> }
>
> 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;
> }
>
> @@ -418,6 +419,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object
> *bo, bool remove_all)
> kref_put(&bo->list_kref, ttm_bo_ref_bug);
> }
> if (bo->mem.mm_node) {
> + bo->mem.mm_node->private = NULL;
> drm_mm_put_block(bo->mem.mm_node);
> bo->mem.mm_node = NULL;
> }
> @@ -554,17 +556,14 @@ 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, 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);
> @@ -584,14 +583,9 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
> unsigned mem_type,
> 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);
> -
> + bdev->driver->evict_flags(bo, &placement);
> + ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
> + no_wait);
> if (ret) {
> if (ret != -ERESTART)
> printk(KERN_ERR TTM_PFX
> @@ -605,95 +599,117 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
> unsigned mem_type,
> if (ret) {
> if (ret != -ERESTART)
> 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;
> }
> + bo->evicted = true;
> +out:
> + return ret;
> +}
> +
> +static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
> + uint32_t mem_type,
> + bool interruptible, bool no_wait)
> +{
> + struct ttm_bo_global *glob = bdev->glob;
> + struct ttm_mem_type_manager *man = &bdev->man[mem_type];
> + struct ttm_buffer_object *bo;
> + int ret, put_count = 0;
>
> spin_lock(&glob->lru_lock);
> - if (evict_mem.mm_node) {
> - drm_mm_put_block(evict_mem.mm_node);
> - evict_mem.mm_node = NULL;
> - }
> + bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
> + kref_get(&bo->list_kref);
> + ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, false, 0);
> + if (likely(ret == 0))
> + put_count = ttm_bo_del_from_lru(bo);
> spin_unlock(&glob->lru_lock);
> - bo->evicted = true;
> -out:
> + if (unlikely(ret != 0))
> + return ret;
> + while (put_count--)
> + kref_put(&bo->list_kref, ttm_bo_ref_bug);
> + ret = ttm_bo_evict(bo, interruptible, no_wait);
> + ttm_bo_unreserve(bo);
> + kref_put(&bo->list_kref, ttm_bo_release_list);
> 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)
> +{
> + 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;
> +
> + 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_bo_device *bdev,
> - struct ttm_mem_reg *mem,
> - uint32_t mem_type,
> - bool interruptible, bool no_wait)
> +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 drm_mm_node *node;
> - struct ttm_buffer_object *entry;
> 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;
> + struct drm_mm_node *node;
> int ret;
>
> -retry_pre_get:
> - ret = drm_mm_pre_get(&man->manager);
> - if (unlikely(ret != 0))
> - return ret;
> -
> - spin_lock(&glob->lru_lock);
> do {
> - node = drm_mm_search_free(&man->manager, num_pages,
> - mem->page_alignment, 1);
> + ret = ttm_bo_man_get_node(bo, man, placement, mem, &node);
> + if (unlikely(ret != 0))
> + return ret;
> if (node)
> break;
> -
> - lru = &man->lru;
> - if (list_empty(lru))
> + spin_lock(&glob->lru_lock);
> + if (list_empty(&man->lru)) {
> + spin_unlock(&glob->lru_lock);
> break;
> -
> - entry = list_first_entry(lru, struct ttm_buffer_object, lru);
> - kref_get(&entry->list_kref);
> -
> - ret =
> - ttm_bo_reserve_locked(entry, interruptible, no_wait,
> - false, 0);
> -
> - if (likely(ret == 0))
> - put_count = ttm_bo_del_from_lru(entry);
> -
> + }
> spin_unlock(&glob->lru_lock);
> -
> + ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
> + no_wait);
> if (unlikely(ret != 0))
> return ret;
> -
> - while (put_count--)
> - kref_put(&entry->list_kref, ttm_bo_ref_bug);
> -
> - ret = ttm_bo_evict(entry, mem_type, interruptible, no_wait);
> -
> - ttm_bo_unreserve(entry);
> -
> - kref_put(&entry->list_kref, ttm_bo_release_list);
> - if (ret)
> - return ret;
> -
> - spin_lock(&glob->lru_lock);
> } while (1);
> -
> - if (!node) {
> - spin_unlock(&glob->lru_lock);
> + if (node == NULL)
> return -ENOMEM;
> - }
> -
> - node = drm_mm_get_block_atomic(node, num_pages, mem->page_alignment);
> - if (unlikely(!node)) {
> - spin_unlock(&glob->lru_lock);
> - goto retry_pre_get;
> - }
> -
> - spin_unlock(&glob->lru_lock);
> mem->mm_node = node;
> mem->mem_type = mem_type;
> return 0;
> @@ -724,7 +740,6 @@ static uint32_t ttm_bo_select_caching(struct
> ttm_mem_type_manager *man,
> return result;
> }
>
> -
> static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
> bool disallow_fixed,
> uint32_t mem_type,
> @@ -748,6 +763,18 @@ static bool ttm_bo_mt_compatible(struct
> ttm_mem_type_manager *man,
> return true;
> }
>
> +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;
> +}
> +
> /**
> * Creates space for memory region @mem according to its type.
> *
> @@ -757,66 +784,55 @@ static bool ttm_bo_mt_compatible(struct
> ttm_mem_type_manager *man,
> * 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_bo_global *glob = bo->glob;
> 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;
> 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(&glob->lru_lock);
> - node = drm_mm_search_free(&man->manager,
> - mem->num_pages,
> - mem->page_alignment,
> - 1);
> - if (unlikely(!node)) {
> - spin_unlock(&glob->lru_lock);
> - break;
> - }
> - node = drm_mm_get_block_atomic(node,
> - mem->num_pages,
> - mem->
> - page_alignment);
> - spin_unlock(&glob->lru_lock);
> - } while (!node);
> + ret = ttm_bo_man_get_node(bo, man, placement, mem,
> + &node);
> + if (unlikely(ret))
> + return ret;
> }
> if (node)
> break;
> @@ -826,43 +842,48 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
> 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->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->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->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;
> }
> -
> ret = (has_eagain) ? -ERESTART : -ENOMEM;
> return ret;
> }
> @@ -885,8 +906,8 @@ int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool
> no_wait)
> }
>
> 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_global *glob = bo->glob;
> int ret = 0;
> @@ -899,101 +920,82 @@ 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);
> 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(&glob->lru_lock);
> + mem.mm_node->private = NULL;
> drm_mm_put_block(mem.mm_node);
> 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)
> + 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);
> @@ -1041,8 +1043,10 @@ int ttm_buffer_object_init(struct ttm_bo_device *bdev,
> size_t acc_size,
> void (*destroy) (struct ttm_buffer_object *))
> {
> - int ret = 0;
> + int i, c, ret = 0;
> unsigned long num_pages;
> + uint32_t placements[8];
> + struct ttm_placement placement;
>
> size += buffer_start & ~PAGE_MASK;
> num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
> @@ -1099,7 +1103,16 @@ int ttm_buffer_object_init(struct ttm_bo_device *bdev,
> goto out_err;
> }
>
> - ret = ttm_buffer_object_validate(bo, flags, interruptible, false);
> + placement.fpfn = 0;
> + placement.lpfn = 0;
> + for (i = 0, c = 0; i <= TTM_PL_PRIV5; i++)
> + if (flags & (1 << i))
> + placements[c++] = (flags & ~TTM_PL_MASK_MEM) | (1 << i);
> + placement.placement = placements;
> + placement.num_placement = c;
> + placement.busy_placement = placements;
> + placement.num_busy_placement = c;
> + ret = ttm_buffer_object_validate(bo, &placement, interruptible, false);
> if (ret)
> goto out_err;
>
> @@ -1134,8 +1147,8 @@ int ttm_buffer_object_create(struct ttm_bo_device *bdev,
> struct ttm_buffer_object **p_bo)
> {
> struct ttm_buffer_object *bo;
> - int ret;
> struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
> + int ret;
>
> size_t acc_size =
> ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
> @@ -1160,66 +1173,32 @@ int ttm_buffer_object_create(struct ttm_bo_device
> *bdev,
> 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_mem_type_manager *man = &bdev->man[mem_type];
> struct ttm_bo_global *glob = bdev->glob;
> - struct ttm_buffer_object *entry;
> int ret;
> - int put_count;
>
> /*
> * Can't use standard list traversal since we're unlocking.
> */
>
> spin_lock(&glob->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);
> + while (!list_empty(&man->lru)) {
> spin_unlock(&glob->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);
> + 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(&glob->lru_lock);
> -
> return 0;
> }
>
> @@ -1246,7 +1225,7 @@ int ttm_bo_clean_mm(struct ttm_bo_device *bdev,
> unsigned mem_type)
>
> 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(&glob->lru_lock);
> if (drm_mm_clean(&man->manager))
> @@ -1279,12 +1258,12 @@ int ttm_bo_evict_mm(struct ttm_bo_device *bdev,
> unsigned mem_type)
> 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;
> @@ -1314,7 +1293,7 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned
> type,
> 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;
> }
> @@ -1463,7 +1442,7 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
> * 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_no_sys;
>
> diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
> index 4911461..2f7f56d 100644
> --- a/include/drm/ttm/ttm_bo_api.h
> +++ b/include/drm/ttm/ttm_bo_api.h
> @@ -44,6 +44,29 @@ struct ttm_bo_device;
>
> struct drm_mm_node;
>
> +
> +/**
> + * struct ttm_placement
> + *
> + * @fpfn: first valid page frame number to put the object
> + * @lpfn: last valid page frame number to put the object
> + * @num_placement: number of prefered placements
> + * @placement: prefered placements
> + * @num_busy_placement: number of prefered placements when need to
> evict buffer
> + * @busy_placement: prefered placements when need to evict buffer
> + *
> + * Structure indicating the placement you request for an object.
> + */
> +struct ttm_placement {
> + unsigned fpfn;
> + unsigned lpfn;
> + unsigned num_placement;
> + const uint32_t *placement;
> + unsigned num_busy_placement;
> + const uint32_t *busy_placement;
> +};
> +
> +
> /**
> * struct ttm_mem_reg
> *
> @@ -109,10 +132,6 @@ struct ttm_tt;
> * the object is destroyed.
> * @event_queue: Queue for processes waiting on buffer object status change.
> * @lock: spinlock protecting mostly synchronization members.
> - * @proposed_placement: Proposed placement for the buffer. Changed only by
> the
> - * creator prior to validation as opposed to bo->mem.proposed_flags which is
> - * changed by the implementation prior to a buffer move if it wants to
> outsmart
> - * the buffer creator / user. This latter happens, for example, at eviction.
> * @mem: structure describing current placement.
> * @persistant_swap_storage: Usually the swap storage is deleted for buffers
> * pinned in physical memory. If this behaviour is not desired, this member
> @@ -177,7 +196,6 @@ struct ttm_buffer_object {
> * Members protected by the bo::reserved lock.
> */
>
> - uint32_t proposed_placement;
> struct ttm_mem_reg mem;
> struct file *persistant_swap_storage;
> struct ttm_tt *ttm;
> @@ -293,21 +311,22 @@ extern int ttm_bo_wait(struct ttm_buffer_object *bo,
> bool lazy,
> * ttm_buffer_object_validate
> *
> * @bo: The buffer object.
> - * @proposed_placement: Proposed_placement for the buffer object.
> + * @placement: Proposed placement for the buffer object.
> * @interruptible: Sleep interruptible if sleeping.
> * @no_wait: Return immediately if the buffer is busy.
> *
> * Changes placement and caching policy of the buffer object
> - * according to bo::proposed_flags.
> + * according proposed placement.
> * Returns
> - * -EINVAL on invalid proposed_flags.
> + * -EINVAL on invalid proposed placement.
> * -ENOMEM on out-of-memory condition.
> * -EBUSY if no_wait is true and buffer busy.
> * -ERESTART if interrupted by a signal.
> */
> extern int ttm_buffer_object_validate(struct ttm_buffer_object *bo,
> - uint32_t proposed_placement,
> - bool interruptible, bool no_wait);
> + struct ttm_placement *placement,
> + bool interruptible, bool no_wait);
> +
> /**
> * ttm_bo_unref
> *
> @@ -445,7 +464,6 @@ extern int ttm_bo_check_placement(struct
> ttm_buffer_object *bo,
> *
> * @bdev: Pointer to a ttm_bo_device struct.
> * @mem_type: The memory type.
> - * @p_offset: offset for managed area in pages.
> * @p_size: size managed area in pages.
> *
> * Initialize a manager for a given memory type.
> @@ -458,7 +476,7 @@ extern int ttm_bo_check_placement(struct
> ttm_buffer_object *bo,
> */
>
> extern int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
> - unsigned long p_offset, unsigned long p_size);
> + unsigned long p_size);
> /**
> * ttm_bo_clean_mm
> *
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index e8cd6d2..1dd1dbc 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -242,12 +242,6 @@ struct ttm_mem_type_manager {
> /**
> * struct ttm_bo_driver
> *
> - * @mem_type_prio: Priority array of memory types to place a buffer object in
> - * if it fits without evicting buffers from any of these memory types.
> - * @mem_busy_prio: Priority array of memory types to place a buffer object in
> - * if it needs to evict buffers to make room.
> - * @num_mem_type_prio: Number of elements in the @mem_type_prio array.
> - * @num_mem_busy_prio: Number of elements in the @num_mem_busy_prio array.
> * @create_ttm_backend_entry: Callback to create a struct ttm_backend.
> * @invalidate_caches: Callback to invalidate read caches when a buffer
> object
> * has been evicted.
> @@ -265,11 +259,6 @@ struct ttm_mem_type_manager {
> */
>
> struct ttm_bo_driver {
> - const uint32_t *mem_type_prio;
> - const uint32_t *mem_busy_prio;
> - uint32_t num_mem_type_prio;
> - uint32_t num_mem_busy_prio;
> -
> /**
> * struct ttm_bo_driver member create_ttm_backend_entry
> *
> @@ -306,7 +295,8 @@ struct ttm_bo_driver {
> * finished, they'll end up in bo->mem.flags
> */
>
> - uint32_t(*evict_flags) (struct ttm_buffer_object *bo);
> + void(*evict_flags) (struct ttm_buffer_object *bo,
> + struct ttm_placement *placement);
> /**
> * struct ttm_bo_driver member move:
> *
> @@ -642,9 +632,9 @@ extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev,
> * -ERESTART: An interruptible sleep was interrupted by a signal.
> */
> extern 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);
> /**
> * ttm_bo_wait_for_cpu
> *
------------------------------------------------------------------------------
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