ttm: Make parts of a struct ttm_bo_device global.
Common resources, like memory accounting and swap lists should be global and not per device. Introduce a struct ttm_bo_global to accomodate this, and register it with sysfs. Add a small sysfs interface to return the number of active buffer objects. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
parent
5fd9cbad3a
commit
a987fcaa80
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@ -37,6 +37,7 @@
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* TTM.
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*/
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struct radeon_mman {
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struct ttm_bo_global_ref bo_global_ref;
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struct ttm_global_reference mem_global_ref;
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bool mem_global_referenced;
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struct ttm_bo_device bdev;
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@ -77,9 +77,25 @@ static int radeon_ttm_global_init(struct radeon_device *rdev)
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global_ref->release = &radeon_ttm_mem_global_release;
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r = ttm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed referencing a global TTM memory object.\n");
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DRM_ERROR("Failed setting up TTM memory accounting "
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"subsystem.\n");
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return r;
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}
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rdev->mman.bo_global_ref.mem_glob =
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rdev->mman.mem_global_ref.object;
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global_ref = &rdev->mman.bo_global_ref.ref;
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global_ref->global_type = TTM_GLOBAL_TTM_BO;
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global_ref->size = sizeof(struct ttm_mem_global);
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global_ref->init = &ttm_bo_global_init;
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global_ref->release = &ttm_bo_global_release;
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r = ttm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed setting up TTM BO subsystem.\n");
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ttm_global_item_unref(&rdev->mman.mem_global_ref);
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return r;
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}
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rdev->mman.mem_global_referenced = true;
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return 0;
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}
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@ -87,6 +103,7 @@ static int radeon_ttm_global_init(struct radeon_device *rdev)
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static void radeon_ttm_global_fini(struct radeon_device *rdev)
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{
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if (rdev->mman.mem_global_referenced) {
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ttm_global_item_unref(&rdev->mman.bo_global_ref.ref);
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ttm_global_item_unref(&rdev->mman.mem_global_ref);
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rdev->mman.mem_global_referenced = false;
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}
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@ -286,9 +303,11 @@ static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
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r = ttm_bo_move_ttm(bo, true, no_wait, new_mem);
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out_cleanup:
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if (tmp_mem.mm_node) {
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spin_lock(&rdev->mman.bdev.lru_lock);
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struct ttm_bo_global *glob = rdev->mman.bdev.glob;
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spin_lock(&glob->lru_lock);
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drm_mm_put_block(tmp_mem.mm_node);
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spin_unlock(&rdev->mman.bdev.lru_lock);
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spin_unlock(&glob->lru_lock);
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return r;
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}
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return r;
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@ -323,9 +342,11 @@ static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
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}
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out_cleanup:
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if (tmp_mem.mm_node) {
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spin_lock(&rdev->mman.bdev.lru_lock);
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struct ttm_bo_global *glob = rdev->mman.bdev.glob;
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spin_lock(&glob->lru_lock);
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drm_mm_put_block(tmp_mem.mm_node);
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spin_unlock(&rdev->mman.bdev.lru_lock);
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spin_unlock(&glob->lru_lock);
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return r;
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}
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return r;
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@ -441,7 +462,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
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}
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/* No others user of address space so set it to 0 */
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r = ttm_bo_device_init(&rdev->mman.bdev,
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rdev->mman.mem_global_ref.object,
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rdev->mman.bo_global_ref.ref.object,
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&radeon_bo_driver, DRM_FILE_PAGE_OFFSET);
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if (r) {
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DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
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@ -45,6 +45,39 @@
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static int ttm_bo_setup_vm(struct ttm_buffer_object *bo);
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static void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
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static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
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static void ttm_bo_global_kobj_release(struct kobject *kobj);
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static struct attribute ttm_bo_count = {
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.name = "bo_count",
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.mode = S_IRUGO
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};
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static ssize_t ttm_bo_global_show(struct kobject *kobj,
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struct attribute *attr,
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char *buffer)
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{
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struct ttm_bo_global *glob =
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container_of(kobj, struct ttm_bo_global, kobj);
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return snprintf(buffer, PAGE_SIZE, "%lu\n",
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(unsigned long) atomic_read(&glob->bo_count));
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}
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static struct attribute *ttm_bo_global_attrs[] = {
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&ttm_bo_count,
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NULL
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};
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static struct sysfs_ops ttm_bo_global_ops = {
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.show = &ttm_bo_global_show
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};
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static struct kobj_type ttm_bo_glob_kobj_type = {
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.release = &ttm_bo_global_kobj_release,
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.sysfs_ops = &ttm_bo_global_ops,
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.default_attrs = ttm_bo_global_attrs
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};
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static inline uint32_t ttm_bo_type_flags(unsigned type)
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{
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@ -67,10 +100,11 @@ static void ttm_bo_release_list(struct kref *list_kref)
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if (bo->ttm)
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ttm_tt_destroy(bo->ttm);
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atomic_dec(&bo->glob->bo_count);
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if (bo->destroy)
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bo->destroy(bo);
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else {
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ttm_mem_global_free(bdev->mem_glob, bo->acc_size);
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ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size);
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kfree(bo);
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}
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}
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@ -107,7 +141,7 @@ static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
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kref_get(&bo->list_kref);
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if (bo->ttm != NULL) {
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list_add_tail(&bo->swap, &bdev->swap_lru);
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list_add_tail(&bo->swap, &bo->glob->swap_lru);
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kref_get(&bo->list_kref);
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}
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}
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@ -142,7 +176,7 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
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bool interruptible,
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bool no_wait, bool use_sequence, uint32_t sequence)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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int ret;
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while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
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@ -154,9 +188,9 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
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if (no_wait)
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return -EBUSY;
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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ret = ttm_bo_wait_unreserved(bo, interruptible);
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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if (unlikely(ret))
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return ret;
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@ -182,16 +216,16 @@ int ttm_bo_reserve(struct ttm_buffer_object *bo,
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bool interruptible,
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bool no_wait, bool use_sequence, uint32_t sequence)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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int put_count = 0;
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int ret;
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence,
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sequence);
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if (likely(ret == 0))
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put_count = ttm_bo_del_from_lru(bo);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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while (put_count--)
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kref_put(&bo->list_kref, ttm_bo_ref_bug);
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@ -201,13 +235,13 @@ int ttm_bo_reserve(struct ttm_buffer_object *bo,
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void ttm_bo_unreserve(struct ttm_buffer_object *bo)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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ttm_bo_add_to_lru(bo);
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atomic_set(&bo->reserved, 0);
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wake_up_all(&bo->event_queue);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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}
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EXPORT_SYMBOL(ttm_bo_unreserve);
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@ -218,6 +252,7 @@ EXPORT_SYMBOL(ttm_bo_unreserve);
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static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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int ret = 0;
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uint32_t page_flags = 0;
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@ -230,14 +265,14 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
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page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
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case ttm_bo_type_kernel:
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bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
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page_flags, bdev->dummy_read_page);
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page_flags, glob->dummy_read_page);
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if (unlikely(bo->ttm == NULL))
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ret = -ENOMEM;
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break;
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case ttm_bo_type_user:
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bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
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page_flags | TTM_PAGE_FLAG_USER,
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bdev->dummy_read_page);
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glob->dummy_read_page);
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if (unlikely(bo->ttm == NULL))
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ret = -ENOMEM;
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break;
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@ -355,6 +390,7 @@ out_err:
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static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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struct ttm_bo_driver *driver = bdev->driver;
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int ret;
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spin_unlock(&bo->lock);
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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ret = ttm_bo_reserve_locked(bo, false, false, false, 0);
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BUG_ON(ret);
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if (bo->ttm)
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@ -381,7 +417,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
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bo->mem.mm_node = NULL;
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}
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put_count = ttm_bo_del_from_lru(bo);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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atomic_set(&bo->reserved, 0);
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@ -391,14 +427,14 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
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return 0;
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}
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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if (list_empty(&bo->ddestroy)) {
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void *sync_obj = bo->sync_obj;
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void *sync_obj_arg = bo->sync_obj_arg;
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kref_get(&bo->list_kref);
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list_add_tail(&bo->ddestroy, &bdev->ddestroy);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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spin_unlock(&bo->lock);
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if (sync_obj)
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@ -408,7 +444,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
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ret = 0;
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} else {
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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spin_unlock(&bo->lock);
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ret = -EBUSY;
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}
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@ -423,11 +459,12 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
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static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
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{
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struct ttm_bo_global *glob = bdev->glob;
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struct ttm_buffer_object *entry, *nentry;
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struct list_head *list, *next;
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int ret;
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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list_for_each_safe(list, next, &bdev->ddestroy) {
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entry = list_entry(list, struct ttm_buffer_object, ddestroy);
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nentry = NULL;
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@ -444,16 +481,16 @@ static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
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}
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kref_get(&entry->list_kref);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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ret = ttm_bo_cleanup_refs(entry, remove_all);
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kref_put(&entry->list_kref, ttm_bo_release_list);
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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if (nentry) {
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bool next_onlist = !list_empty(next);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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kref_put(&nentry->list_kref, ttm_bo_release_list);
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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/*
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* Someone might have raced us and removed the
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* next entry from the list. We don't bother restarting
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@ -467,7 +504,7 @@ static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
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break;
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}
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ret = !list_empty(&bdev->ddestroy);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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return ret;
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}
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@ -517,6 +554,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, unsigned mem_type,
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{
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int ret = 0;
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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struct ttm_mem_reg evict_mem;
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uint32_t proposed_placement;
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@ -565,12 +603,12 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, unsigned mem_type,
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goto out;
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}
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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if (evict_mem.mm_node) {
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drm_mm_put_block(evict_mem.mm_node);
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evict_mem.mm_node = NULL;
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}
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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bo->evicted = true;
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out:
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return ret;
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@ -585,6 +623,7 @@ static int ttm_bo_mem_force_space(struct ttm_bo_device *bdev,
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uint32_t mem_type,
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bool interruptible, bool no_wait)
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{
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struct ttm_bo_global *glob = bdev->glob;
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struct drm_mm_node *node;
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struct ttm_buffer_object *entry;
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struct ttm_mem_type_manager *man = &bdev->man[mem_type];
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@ -598,7 +637,7 @@ retry_pre_get:
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if (unlikely(ret != 0))
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return ret;
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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do {
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node = drm_mm_search_free(&man->manager, num_pages,
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mem->page_alignment, 1);
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@ -619,7 +658,7 @@ retry_pre_get:
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if (likely(ret == 0))
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put_count = ttm_bo_del_from_lru(entry);
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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if (unlikely(ret != 0))
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return ret;
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@ -635,21 +674,21 @@ retry_pre_get:
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if (ret)
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return ret;
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spin_lock(&bdev->lru_lock);
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spin_lock(&glob->lru_lock);
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} while (1);
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if (!node) {
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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return -ENOMEM;
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}
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node = drm_mm_get_block_atomic(node, num_pages, mem->page_alignment);
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if (unlikely(!node)) {
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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goto retry_pre_get;
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}
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spin_unlock(&bdev->lru_lock);
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spin_unlock(&glob->lru_lock);
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mem->mm_node = node;
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mem->mem_type = mem_type;
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return 0;
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@ -697,6 +736,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
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bool interruptible, bool no_wait)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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struct ttm_mem_type_manager *man;
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uint32_t num_prios = bdev->driver->num_mem_type_prio;
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@ -733,20 +773,20 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
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if (unlikely(ret))
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return ret;
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|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
node = drm_mm_search_free(&man->manager,
|
||||
mem->num_pages,
|
||||
mem->page_alignment,
|
||||
1);
|
||||
if (unlikely(!node)) {
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
break;
|
||||
}
|
||||
node = drm_mm_get_block_atomic(node,
|
||||
mem->num_pages,
|
||||
mem->
|
||||
page_alignment);
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
} while (!node);
|
||||
}
|
||||
if (node)
|
||||
|
@ -816,7 +856,7 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
|
|||
uint32_t proposed_placement,
|
||||
bool interruptible, bool no_wait)
|
||||
{
|
||||
struct ttm_bo_device *bdev = bo->bdev;
|
||||
struct ttm_bo_global *glob = bo->glob;
|
||||
int ret = 0;
|
||||
struct ttm_mem_reg mem;
|
||||
|
||||
|
@ -852,9 +892,9 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
|
|||
|
||||
out_unlock:
|
||||
if (ret && mem.mm_node) {
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
drm_mm_put_block(mem.mm_node);
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
@ -990,6 +1030,7 @@ int ttm_buffer_object_init(struct ttm_bo_device *bdev,
|
|||
INIT_LIST_HEAD(&bo->ddestroy);
|
||||
INIT_LIST_HEAD(&bo->swap);
|
||||
bo->bdev = bdev;
|
||||
bo->glob = bdev->glob;
|
||||
bo->type = type;
|
||||
bo->num_pages = num_pages;
|
||||
bo->mem.mem_type = TTM_PL_SYSTEM;
|
||||
|
@ -1002,6 +1043,7 @@ int ttm_buffer_object_init(struct ttm_bo_device *bdev,
|
|||
bo->seq_valid = false;
|
||||
bo->persistant_swap_storage = persistant_swap_storage;
|
||||
bo->acc_size = acc_size;
|
||||
atomic_inc(&bo->glob->bo_count);
|
||||
|
||||
ret = ttm_bo_check_placement(bo, flags, 0ULL);
|
||||
if (unlikely(ret != 0))
|
||||
|
@ -1040,13 +1082,13 @@ out_err:
|
|||
}
|
||||
EXPORT_SYMBOL(ttm_buffer_object_init);
|
||||
|
||||
static inline size_t ttm_bo_size(struct ttm_bo_device *bdev,
|
||||
static inline size_t ttm_bo_size(struct ttm_bo_global *glob,
|
||||
unsigned long num_pages)
|
||||
{
|
||||
size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) &
|
||||
PAGE_MASK;
|
||||
|
||||
return bdev->ttm_bo_size + 2 * page_array_size;
|
||||
return glob->ttm_bo_size + 2 * page_array_size;
|
||||
}
|
||||
|
||||
int ttm_buffer_object_create(struct ttm_bo_device *bdev,
|
||||
|
@ -1061,10 +1103,10 @@ int ttm_buffer_object_create(struct ttm_bo_device *bdev,
|
|||
{
|
||||
struct ttm_buffer_object *bo;
|
||||
int ret;
|
||||
struct ttm_mem_global *mem_glob = bdev->mem_glob;
|
||||
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
|
||||
|
||||
size_t acc_size =
|
||||
ttm_bo_size(bdev, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
|
||||
ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
|
||||
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
|
||||
if (unlikely(ret != 0))
|
||||
return ret;
|
||||
|
@ -1118,6 +1160,7 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
|
|||
struct list_head *head,
|
||||
unsigned mem_type, bool allow_errors)
|
||||
{
|
||||
struct ttm_bo_global *glob = bdev->glob;
|
||||
struct ttm_buffer_object *entry;
|
||||
int ret;
|
||||
int put_count;
|
||||
|
@ -1126,30 +1169,31 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
|
|||
* Can't use standard list traversal since we're unlocking.
|
||||
*/
|
||||
|
||||
spin_lock(&bdev->lru_lock);
|
||||
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);
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
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);
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
}
|
||||
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
|
||||
{
|
||||
struct ttm_bo_global *glob = bdev->glob;
|
||||
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
|
||||
int ret = -EINVAL;
|
||||
|
||||
|
@ -1171,13 +1215,13 @@ int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
|
|||
if (mem_type > 0) {
|
||||
ttm_bo_force_list_clean(bdev, &man->lru, mem_type, false);
|
||||
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
if (drm_mm_clean(&man->manager))
|
||||
drm_mm_takedown(&man->manager);
|
||||
else
|
||||
ret = -EBUSY;
|
||||
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
@ -1251,11 +1295,83 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
|
|||
}
|
||||
EXPORT_SYMBOL(ttm_bo_init_mm);
|
||||
|
||||
static void ttm_bo_global_kobj_release(struct kobject *kobj)
|
||||
{
|
||||
struct ttm_bo_global *glob =
|
||||
container_of(kobj, struct ttm_bo_global, kobj);
|
||||
|
||||
printk(KERN_INFO TTM_PFX "Freeing bo global.\n");
|
||||
ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
|
||||
__free_page(glob->dummy_read_page);
|
||||
kfree(glob);
|
||||
}
|
||||
|
||||
void ttm_bo_global_release(struct ttm_global_reference *ref)
|
||||
{
|
||||
struct ttm_bo_global *glob = ref->object;
|
||||
|
||||
kobject_del(&glob->kobj);
|
||||
kobject_put(&glob->kobj);
|
||||
}
|
||||
EXPORT_SYMBOL(ttm_bo_global_release);
|
||||
|
||||
int ttm_bo_global_init(struct ttm_global_reference *ref)
|
||||
{
|
||||
struct ttm_bo_global_ref *bo_ref =
|
||||
container_of(ref, struct ttm_bo_global_ref, ref);
|
||||
struct ttm_bo_global *glob = ref->object;
|
||||
int ret;
|
||||
|
||||
mutex_init(&glob->device_list_mutex);
|
||||
spin_lock_init(&glob->lru_lock);
|
||||
glob->mem_glob = bo_ref->mem_glob;
|
||||
glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
|
||||
|
||||
if (unlikely(glob->dummy_read_page == NULL)) {
|
||||
ret = -ENOMEM;
|
||||
goto out_no_drp;
|
||||
}
|
||||
|
||||
INIT_LIST_HEAD(&glob->swap_lru);
|
||||
INIT_LIST_HEAD(&glob->device_list);
|
||||
|
||||
ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
|
||||
ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
|
||||
if (unlikely(ret != 0)) {
|
||||
printk(KERN_ERR TTM_PFX
|
||||
"Could not register buffer object swapout.\n");
|
||||
goto out_no_shrink;
|
||||
}
|
||||
|
||||
glob->ttm_bo_extra_size =
|
||||
ttm_round_pot(sizeof(struct ttm_tt)) +
|
||||
ttm_round_pot(sizeof(struct ttm_backend));
|
||||
|
||||
glob->ttm_bo_size = glob->ttm_bo_extra_size +
|
||||
ttm_round_pot(sizeof(struct ttm_buffer_object));
|
||||
|
||||
atomic_set(&glob->bo_count, 0);
|
||||
|
||||
kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type);
|
||||
ret = kobject_add(&glob->kobj, ttm_get_kobj(), "buffer_objects");
|
||||
if (unlikely(ret != 0))
|
||||
kobject_put(&glob->kobj);
|
||||
return ret;
|
||||
out_no_shrink:
|
||||
__free_page(glob->dummy_read_page);
|
||||
out_no_drp:
|
||||
kfree(glob);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ttm_bo_global_init);
|
||||
|
||||
|
||||
int ttm_bo_device_release(struct ttm_bo_device *bdev)
|
||||
{
|
||||
int ret = 0;
|
||||
unsigned i = TTM_NUM_MEM_TYPES;
|
||||
struct ttm_mem_type_manager *man;
|
||||
struct ttm_bo_global *glob = bdev->glob;
|
||||
|
||||
while (i--) {
|
||||
man = &bdev->man[i];
|
||||
|
@ -1271,98 +1387,74 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
|
|||
}
|
||||
}
|
||||
|
||||
mutex_lock(&glob->device_list_mutex);
|
||||
list_del(&bdev->device_list);
|
||||
mutex_unlock(&glob->device_list_mutex);
|
||||
|
||||
if (!cancel_delayed_work(&bdev->wq))
|
||||
flush_scheduled_work();
|
||||
|
||||
while (ttm_bo_delayed_delete(bdev, true))
|
||||
;
|
||||
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
if (list_empty(&bdev->ddestroy))
|
||||
TTM_DEBUG("Delayed destroy list was clean\n");
|
||||
|
||||
if (list_empty(&bdev->man[0].lru))
|
||||
TTM_DEBUG("Swap list was clean\n");
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
|
||||
ttm_mem_unregister_shrink(bdev->mem_glob, &bdev->shrink);
|
||||
BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
|
||||
write_lock(&bdev->vm_lock);
|
||||
drm_mm_takedown(&bdev->addr_space_mm);
|
||||
write_unlock(&bdev->vm_lock);
|
||||
|
||||
__free_page(bdev->dummy_read_page);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ttm_bo_device_release);
|
||||
|
||||
/*
|
||||
* This function is intended to be called on drm driver load.
|
||||
* If you decide to call it from firstopen, you must protect the call
|
||||
* from a potentially racing ttm_bo_driver_finish in lastclose.
|
||||
* (This may happen on X server restart).
|
||||
*/
|
||||
|
||||
int ttm_bo_device_init(struct ttm_bo_device *bdev,
|
||||
struct ttm_mem_global *mem_glob,
|
||||
struct ttm_bo_driver *driver, uint64_t file_page_offset)
|
||||
struct ttm_bo_global *glob,
|
||||
struct ttm_bo_driver *driver,
|
||||
uint64_t file_page_offset)
|
||||
{
|
||||
int ret = -EINVAL;
|
||||
|
||||
bdev->dummy_read_page = NULL;
|
||||
rwlock_init(&bdev->vm_lock);
|
||||
spin_lock_init(&bdev->lru_lock);
|
||||
spin_lock_init(&glob->lru_lock);
|
||||
|
||||
bdev->driver = driver;
|
||||
bdev->mem_glob = mem_glob;
|
||||
|
||||
memset(bdev->man, 0, sizeof(bdev->man));
|
||||
|
||||
bdev->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
|
||||
if (unlikely(bdev->dummy_read_page == NULL)) {
|
||||
ret = -ENOMEM;
|
||||
goto out_err0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the system memory buffer type.
|
||||
* Other types need to be driver / IOCTL initialized.
|
||||
*/
|
||||
ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0, 0);
|
||||
if (unlikely(ret != 0))
|
||||
goto out_err1;
|
||||
goto out_no_sys;
|
||||
|
||||
bdev->addr_space_rb = RB_ROOT;
|
||||
ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
|
||||
if (unlikely(ret != 0))
|
||||
goto out_err2;
|
||||
goto out_no_addr_mm;
|
||||
|
||||
INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
|
||||
bdev->nice_mode = true;
|
||||
INIT_LIST_HEAD(&bdev->ddestroy);
|
||||
INIT_LIST_HEAD(&bdev->swap_lru);
|
||||
bdev->dev_mapping = NULL;
|
||||
ttm_mem_init_shrink(&bdev->shrink, ttm_bo_swapout);
|
||||
ret = ttm_mem_register_shrink(mem_glob, &bdev->shrink);
|
||||
if (unlikely(ret != 0)) {
|
||||
printk(KERN_ERR TTM_PFX
|
||||
"Could not register buffer object swapout.\n");
|
||||
goto out_err2;
|
||||
}
|
||||
bdev->glob = glob;
|
||||
|
||||
bdev->ttm_bo_extra_size =
|
||||
ttm_round_pot(sizeof(struct ttm_tt)) +
|
||||
ttm_round_pot(sizeof(struct ttm_backend));
|
||||
|
||||
bdev->ttm_bo_size = bdev->ttm_bo_extra_size +
|
||||
ttm_round_pot(sizeof(struct ttm_buffer_object));
|
||||
mutex_lock(&glob->device_list_mutex);
|
||||
list_add_tail(&bdev->device_list, &glob->device_list);
|
||||
mutex_unlock(&glob->device_list_mutex);
|
||||
|
||||
return 0;
|
||||
out_err2:
|
||||
out_no_addr_mm:
|
||||
ttm_bo_clean_mm(bdev, 0);
|
||||
out_err1:
|
||||
__free_page(bdev->dummy_read_page);
|
||||
out_err0:
|
||||
out_no_sys:
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ttm_bo_device_init);
|
||||
|
@ -1607,21 +1699,21 @@ void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
|
|||
|
||||
static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
|
||||
{
|
||||
struct ttm_bo_device *bdev =
|
||||
container_of(shrink, struct ttm_bo_device, shrink);
|
||||
struct ttm_bo_global *glob =
|
||||
container_of(shrink, struct ttm_bo_global, shrink);
|
||||
struct ttm_buffer_object *bo;
|
||||
int ret = -EBUSY;
|
||||
int put_count;
|
||||
uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
|
||||
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
while (ret == -EBUSY) {
|
||||
if (unlikely(list_empty(&bdev->swap_lru))) {
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
if (unlikely(list_empty(&glob->swap_lru))) {
|
||||
spin_unlock(&glob->lru_lock);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
bo = list_first_entry(&bdev->swap_lru,
|
||||
bo = list_first_entry(&glob->swap_lru,
|
||||
struct ttm_buffer_object, swap);
|
||||
kref_get(&bo->list_kref);
|
||||
|
||||
|
@ -1633,16 +1725,16 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
|
|||
|
||||
ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
|
||||
if (unlikely(ret == -EBUSY)) {
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
ttm_bo_wait_unreserved(bo, false);
|
||||
kref_put(&bo->list_kref, ttm_bo_release_list);
|
||||
spin_lock(&bdev->lru_lock);
|
||||
spin_lock(&glob->lru_lock);
|
||||
}
|
||||
}
|
||||
|
||||
BUG_ON(ret != 0);
|
||||
put_count = ttm_bo_del_from_lru(bo);
|
||||
spin_unlock(&bdev->lru_lock);
|
||||
spin_unlock(&glob->lru_lock);
|
||||
|
||||
while (put_count--)
|
||||
kref_put(&bo->list_kref, ttm_bo_ref_bug);
|
||||
|
@ -1696,6 +1788,6 @@ out:
|
|||
|
||||
void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
|
||||
{
|
||||
while (ttm_bo_swapout(&bdev->shrink) == 0)
|
||||
while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
|
||||
;
|
||||
}
|
||||
|
|
|
@ -41,9 +41,9 @@ void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
|
|||
struct ttm_mem_reg *old_mem = &bo->mem;
|
||||
|
||||
if (old_mem->mm_node) {
|
||||
spin_lock(&bo->bdev->lru_lock);
|
||||
spin_lock(&bo->glob->lru_lock);
|
||||
drm_mm_put_block(old_mem->mm_node);
|
||||
spin_unlock(&bo->bdev->lru_lock);
|
||||
spin_unlock(&bo->glob->lru_lock);
|
||||
}
|
||||
old_mem->mm_node = NULL;
|
||||
}
|
||||
|
|
|
@ -166,7 +166,7 @@ static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
|
|||
set_page_dirty_lock(page);
|
||||
|
||||
ttm->pages[i] = NULL;
|
||||
ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE);
|
||||
ttm_mem_global_free(ttm->glob->mem_glob, PAGE_SIZE);
|
||||
put_page(page);
|
||||
}
|
||||
ttm->state = tt_unpopulated;
|
||||
|
@ -177,8 +177,7 @@ static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
|
|||
static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
|
||||
{
|
||||
struct page *p;
|
||||
struct ttm_bo_device *bdev = ttm->bdev;
|
||||
struct ttm_mem_global *mem_glob = bdev->mem_glob;
|
||||
struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
|
||||
int ret;
|
||||
|
||||
while (NULL == (p = ttm->pages[index])) {
|
||||
|
@ -348,7 +347,7 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
|
|||
printk(KERN_ERR TTM_PFX
|
||||
"Erroneous page count. "
|
||||
"Leaking pages.\n");
|
||||
ttm_mem_global_free_page(ttm->bdev->mem_glob,
|
||||
ttm_mem_global_free_page(ttm->glob->mem_glob,
|
||||
cur_page);
|
||||
__free_page(cur_page);
|
||||
}
|
||||
|
@ -394,7 +393,7 @@ int ttm_tt_set_user(struct ttm_tt *ttm,
|
|||
struct mm_struct *mm = tsk->mm;
|
||||
int ret;
|
||||
int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
|
||||
struct ttm_mem_global *mem_glob = ttm->bdev->mem_glob;
|
||||
struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
|
||||
|
||||
BUG_ON(num_pages != ttm->num_pages);
|
||||
BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
|
||||
|
@ -439,8 +438,7 @@ struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
|
|||
if (!ttm)
|
||||
return NULL;
|
||||
|
||||
ttm->bdev = bdev;
|
||||
|
||||
ttm->glob = bdev->glob;
|
||||
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
||||
ttm->first_himem_page = ttm->num_pages;
|
||||
ttm->last_lomem_page = -1;
|
||||
|
|
|
@ -155,6 +155,7 @@ struct ttm_buffer_object {
|
|||
* Members constant at init.
|
||||
*/
|
||||
|
||||
struct ttm_bo_global *glob;
|
||||
struct ttm_bo_device *bdev;
|
||||
unsigned long buffer_start;
|
||||
enum ttm_bo_type type;
|
||||
|
|
|
@ -32,6 +32,7 @@
|
|||
|
||||
#include "ttm/ttm_bo_api.h"
|
||||
#include "ttm/ttm_memory.h"
|
||||
#include "ttm/ttm_module.h"
|
||||
#include "drm_mm.h"
|
||||
#include "linux/workqueue.h"
|
||||
#include "linux/fs.h"
|
||||
|
@ -160,7 +161,7 @@ struct ttm_tt {
|
|||
long last_lomem_page;
|
||||
uint32_t page_flags;
|
||||
unsigned long num_pages;
|
||||
struct ttm_bo_device *bdev;
|
||||
struct ttm_bo_global *glob;
|
||||
struct ttm_backend *be;
|
||||
struct task_struct *tsk;
|
||||
unsigned long start;
|
||||
|
@ -355,6 +356,64 @@ struct ttm_bo_driver {
|
|||
void *(*sync_obj_ref) (void *sync_obj);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
|
||||
*/
|
||||
|
||||
struct ttm_bo_global_ref {
|
||||
struct ttm_global_reference ref;
|
||||
struct ttm_mem_global *mem_glob;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ttm_bo_global - Buffer object driver global data.
|
||||
*
|
||||
* @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
|
||||
* @dummy_read_page: Pointer to a dummy page used for mapping requests
|
||||
* of unpopulated pages.
|
||||
* @shrink: A shrink callback object used for buffer object swap.
|
||||
* @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded)
|
||||
* used by a buffer object. This is excluding page arrays and backing pages.
|
||||
* @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object).
|
||||
* @device_list_mutex: Mutex protecting the device list.
|
||||
* This mutex is held while traversing the device list for pm options.
|
||||
* @lru_lock: Spinlock protecting the bo subsystem lru lists.
|
||||
* @device_list: List of buffer object devices.
|
||||
* @swap_lru: Lru list of buffer objects used for swapping.
|
||||
*/
|
||||
|
||||
struct ttm_bo_global {
|
||||
|
||||
/**
|
||||
* Constant after init.
|
||||
*/
|
||||
|
||||
struct kobject kobj;
|
||||
struct ttm_mem_global *mem_glob;
|
||||
struct page *dummy_read_page;
|
||||
struct ttm_mem_shrink shrink;
|
||||
size_t ttm_bo_extra_size;
|
||||
size_t ttm_bo_size;
|
||||
struct mutex device_list_mutex;
|
||||
spinlock_t lru_lock;
|
||||
|
||||
/**
|
||||
* Protected by device_list_mutex.
|
||||
*/
|
||||
struct list_head device_list;
|
||||
|
||||
/**
|
||||
* Protected by the lru_lock.
|
||||
*/
|
||||
struct list_head swap_lru;
|
||||
|
||||
/**
|
||||
* Internal protection.
|
||||
*/
|
||||
atomic_t bo_count;
|
||||
};
|
||||
|
||||
|
||||
#define TTM_NUM_MEM_TYPES 8
|
||||
|
||||
#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs
|
||||
|
@ -363,16 +422,7 @@ struct ttm_bo_driver {
|
|||
/**
|
||||
* struct ttm_bo_device - Buffer object driver device-specific data.
|
||||
*
|
||||
* @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
|
||||
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
|
||||
* @count: Current number of buffer object.
|
||||
* @pages: Current number of pinned pages.
|
||||
* @dummy_read_page: Pointer to a dummy page used for mapping requests
|
||||
* of unpopulated pages.
|
||||
* @shrink: A shrink callback object used for buffre object swap.
|
||||
* @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded)
|
||||
* used by a buffer object. This is excluding page arrays and backing pages.
|
||||
* @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object).
|
||||
* @man: An array of mem_type_managers.
|
||||
* @addr_space_mm: Range manager for the device address space.
|
||||
* lru_lock: Spinlock that protects the buffer+device lru lists and
|
||||
|
@ -390,32 +440,21 @@ struct ttm_bo_device {
|
|||
/*
|
||||
* Constant after bo device init / atomic.
|
||||
*/
|
||||
|
||||
struct ttm_mem_global *mem_glob;
|
||||
struct list_head device_list;
|
||||
struct ttm_bo_global *glob;
|
||||
struct ttm_bo_driver *driver;
|
||||
struct page *dummy_read_page;
|
||||
struct ttm_mem_shrink shrink;
|
||||
|
||||
size_t ttm_bo_extra_size;
|
||||
size_t ttm_bo_size;
|
||||
|
||||
rwlock_t vm_lock;
|
||||
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
|
||||
/*
|
||||
* Protected by the vm lock.
|
||||
*/
|
||||
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
|
||||
struct rb_root addr_space_rb;
|
||||
struct drm_mm addr_space_mm;
|
||||
|
||||
/*
|
||||
* Might want to change this to one lock per manager.
|
||||
*/
|
||||
spinlock_t lru_lock;
|
||||
/*
|
||||
* Protected by the lru lock.
|
||||
* Protected by the global:lru lock.
|
||||
*/
|
||||
struct list_head ddestroy;
|
||||
struct list_head swap_lru;
|
||||
|
||||
/*
|
||||
* Protected by load / firstopen / lastclose /unload sync.
|
||||
|
@ -629,6 +668,9 @@ extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
|
|||
unsigned long *bus_offset,
|
||||
unsigned long *bus_size);
|
||||
|
||||
extern void ttm_bo_global_release(struct ttm_global_reference *ref);
|
||||
extern int ttm_bo_global_init(struct ttm_global_reference *ref);
|
||||
|
||||
extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
|
||||
|
||||
/**
|
||||
|
@ -646,7 +688,7 @@ extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
|
|||
* !0: Failure.
|
||||
*/
|
||||
extern int ttm_bo_device_init(struct ttm_bo_device *bdev,
|
||||
struct ttm_mem_global *mem_glob,
|
||||
struct ttm_bo_global *glob,
|
||||
struct ttm_bo_driver *driver,
|
||||
uint64_t file_page_offset);
|
||||
|
||||
|
|
Loading…
Reference in a new issue