diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.h | 70 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.c | 58 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.h | 93 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem_shrinker.c | 117 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.h | 6 |
7 files changed, 104 insertions, 257 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index d7ca025457b6..1ca4a92ba96e 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -418,14 +418,18 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv) INIT_LIST_HEAD(&priv->objects); mutex_init(&priv->obj_lock); - INIT_LIST_HEAD(&priv->inactive_willneed); - INIT_LIST_HEAD(&priv->inactive_dontneed); - INIT_LIST_HEAD(&priv->inactive_unpinned); - mutex_init(&priv->mm_lock); + /* + * Initialize the LRUs: + */ + mutex_init(&priv->lru.lock); + drm_gem_lru_init(&priv->lru.unbacked, &priv->lru.lock); + drm_gem_lru_init(&priv->lru.pinned, &priv->lru.lock); + drm_gem_lru_init(&priv->lru.willneed, &priv->lru.lock); + drm_gem_lru_init(&priv->lru.dontneed, &priv->lru.lock); /* Teach lockdep about lock ordering wrt. shrinker: */ fs_reclaim_acquire(GFP_KERNEL); - might_lock(&priv->mm_lock); + might_lock(&priv->lru.lock); fs_reclaim_release(GFP_KERNEL); drm_mode_config_init(ddev); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index b3689a2d27d7..208ae5bc5e6b 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -142,28 +142,60 @@ struct msm_drm_private { struct mutex obj_lock; /** - * LRUs of inactive GEM objects. Every bo is either in one of the - * inactive lists (depending on whether or not it is shrinkable) or - * gpu->active_list (for the gpu it is active on[1]), or transiently - * on a temporary list as the shrinker is running. + * lru: * - * Note that inactive_willneed also contains pinned and vmap'd bos, - * but the number of pinned-but-not-active objects is small (scanout - * buffers, ringbuffer, etc). + * The various LRU's that a GEM object is in at various stages of + * it's lifetime. Objects start out in the unbacked LRU. When + * pinned (for scannout or permanently mapped GPU buffers, like + * ringbuffer, memptr, fw, etc) it moves to the pinned LRU. When + * unpinned, it moves into willneed or dontneed LRU depending on + * madvise state. When backing pages are evicted (willneed) or + * purged (dontneed) it moves back into the unbacked LRU. * - * These lists are protected by mm_lock (which should be acquired - * before per GEM object lock). One should *not* hold mm_lock in - * get_pages()/vmap()/etc paths, as they can trigger the shrinker. - * - * [1] if someone ever added support for the old 2d cores, there could be - * more than one gpu object + * The dontneed LRU is considered by the shrinker for objects + * that are candidate for purging, and the willneed LRU is + * considered for objects that could be evicted. */ - struct list_head inactive_willneed; /* inactive + potentially unpin/evictable */ - struct list_head inactive_dontneed; /* inactive + shrinkable */ - struct list_head inactive_unpinned; /* inactive + purged or unpinned */ - long shrinkable_count; /* write access under mm_lock */ - long evictable_count; /* write access under mm_lock */ - struct mutex mm_lock; + struct { + /** + * unbacked: + * + * The LRU for GEM objects without backing pages allocated. + * This mostly exists so that objects are always is one + * LRU. + */ + struct drm_gem_lru unbacked; + + /** + * pinned: + * + * The LRU for pinned GEM objects + */ + struct drm_gem_lru pinned; + + /** + * willneed: + * + * The LRU for unpinned GEM objects which are in madvise + * WILLNEED state (ie. can be evicted) + */ + struct drm_gem_lru willneed; + + /** + * dontneed: + * + * The LRU for unpinned GEM objects which are in madvise + * DONTNEED state (ie. can be purged) + */ + struct drm_gem_lru dontneed; + + /** + * lock: + * + * Protects manipulation of all of the LRUs. + */ + struct mutex lock; + } lru; struct workqueue_struct *wq; diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 209438744bab..d4e8af46f4ef 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -174,6 +174,7 @@ static void put_pages(struct drm_gem_object *obj) put_pages_vram(obj); msm_obj->pages = NULL; + update_lru(obj); } } @@ -210,8 +211,6 @@ struct page **msm_gem_pin_pages(struct drm_gem_object *obj) void msm_gem_unpin_pages(struct drm_gem_object *obj) { - struct msm_gem_object *msm_obj = to_msm_bo(obj); - msm_gem_lock(obj); msm_gem_unpin_locked(obj); msm_gem_unlock(obj); @@ -761,7 +760,6 @@ void msm_gem_purge(struct drm_gem_object *obj) put_iova_vmas(obj); msm_obj->madv = __MSM_MADV_PURGED; - update_lru(obj); drm_gem_free_mmap_offset(obj); @@ -786,7 +784,6 @@ void msm_gem_evict(struct drm_gem_object *obj) GEM_WARN_ON(!msm_gem_is_locked(obj)); GEM_WARN_ON(is_unevictable(msm_obj)); - GEM_WARN_ON(!msm_obj->evictable); /* Get rid of any iommu mapping(s): */ put_iova_spaces(obj, false); @@ -794,8 +791,6 @@ void msm_gem_evict(struct drm_gem_object *obj) drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); put_pages(obj); - - update_lru(obj); } void msm_gem_vunmap(struct drm_gem_object *obj) @@ -818,26 +813,20 @@ static void update_lru(struct drm_gem_object *obj) GEM_WARN_ON(!msm_gem_is_locked(&msm_obj->base)); - mutex_lock(&priv->mm_lock); - - if (msm_obj->dontneed) - mark_unpurgeable(msm_obj); - if (msm_obj->evictable) - mark_unevictable(msm_obj); - - list_del(&msm_obj->mm_list); - if ((msm_obj->madv == MSM_MADV_WILLNEED) && msm_obj->sgt) { - list_add_tail(&msm_obj->mm_list, &priv->inactive_willneed); - mark_evictable(msm_obj); - } else if (msm_obj->madv == MSM_MADV_DONTNEED) { - list_add_tail(&msm_obj->mm_list, &priv->inactive_dontneed); - mark_purgeable(msm_obj); + if (!msm_obj->pages) { + GEM_WARN_ON(msm_obj->pin_count); + GEM_WARN_ON(msm_obj->vmap_count); + + drm_gem_lru_move_tail(&priv->lru.unbacked, obj); + } else if (msm_obj->pin_count || msm_obj->vmap_count) { + drm_gem_lru_move_tail(&priv->lru.pinned, obj); + } else if (msm_obj->madv == MSM_MADV_WILLNEED) { + drm_gem_lru_move_tail(&priv->lru.willneed, obj); } else { - GEM_WARN_ON((msm_obj->madv != __MSM_MADV_PURGED) && msm_obj->sgt); - list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); - } + GEM_WARN_ON(msm_obj->madv != MSM_MADV_DONTNEED); - mutex_unlock(&priv->mm_lock); + drm_gem_lru_move_tail(&priv->lru.dontneed, obj); + } } bool msm_gem_active(struct drm_gem_object *obj) @@ -995,12 +984,6 @@ static void msm_gem_free_object(struct drm_gem_object *obj) list_del(&msm_obj->node); mutex_unlock(&priv->obj_lock); - mutex_lock(&priv->mm_lock); - if (msm_obj->dontneed) - mark_unpurgeable(msm_obj); - list_del(&msm_obj->mm_list); - mutex_unlock(&priv->mm_lock); - put_iova_spaces(obj, true); if (obj->import_attach) { @@ -1160,13 +1143,6 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32 to_msm_bo(obj)->vram_node = &vma->node; - /* Call chain get_pages() -> update_inactive() tries to - * access msm_obj->mm_list, but it is not initialized yet. - * To avoid NULL pointer dereference error, initialize - * mm_list to be empty. - */ - INIT_LIST_HEAD(&msm_obj->mm_list); - msm_gem_lock(obj); pages = get_pages(obj); msm_gem_unlock(obj); @@ -1189,9 +1165,7 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER); } - mutex_lock(&priv->mm_lock); - list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); - mutex_unlock(&priv->mm_lock); + drm_gem_lru_move_tail(&priv->lru.unbacked, obj); mutex_lock(&priv->obj_lock); list_add_tail(&msm_obj->node, &priv->objects); @@ -1247,9 +1221,7 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev, msm_gem_unlock(obj); - mutex_lock(&priv->mm_lock); - list_add_tail(&msm_obj->mm_list, &priv->inactive_unpinned); - mutex_unlock(&priv->mm_lock); + drm_gem_lru_move_tail(&priv->lru.pinned, obj); mutex_lock(&priv->obj_lock); list_add_tail(&msm_obj->node, &priv->objects); diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h index 420ba49bf21a..0403b27ff779 100644 --- a/drivers/gpu/drm/msm/msm_gem.h +++ b/drivers/gpu/drm/msm/msm_gem.h @@ -94,16 +94,6 @@ struct msm_gem_object { uint8_t madv; /** - * Is object on inactive_dontneed list (ie. counted in priv->shrinkable_count)? - */ - bool dontneed : 1; - - /** - * Is object evictable (ie. counted in priv->evictable_count)? - */ - bool evictable : 1; - - /** * count of active vmap'ing */ uint8_t vmap_count; @@ -114,17 +104,6 @@ struct msm_gem_object { */ struct list_head node; - /** - * An object is either: - * inactive - on priv->inactive_dontneed or priv->inactive_willneed - * (depending on purgeability status) - * active - on one one of the gpu's active_list.. well, at - * least for now we don't have (I don't think) hw sync between - * 2d and 3d one devices which have both, meaning we need to - * block on submit if a bo is already on other ring - */ - struct list_head mm_list; - struct page **pages; struct sg_table *sgt; void *vaddr; @@ -206,12 +185,6 @@ msm_gem_lock(struct drm_gem_object *obj) dma_resv_lock(obj->resv, NULL); } -static inline bool __must_check -msm_gem_trylock(struct drm_gem_object *obj) -{ - return dma_resv_trylock(obj->resv); -} - static inline int msm_gem_lock_interruptible(struct drm_gem_object *obj) { @@ -260,77 +233,11 @@ static inline bool is_vunmapable(struct msm_gem_object *msm_obj) return (msm_obj->vmap_count == 0) && msm_obj->vaddr; } -static inline void mark_purgeable(struct msm_gem_object *msm_obj) -{ - struct msm_drm_private *priv = msm_obj->base.dev->dev_private; - - GEM_WARN_ON(!mutex_is_locked(&priv->mm_lock)); - - if (is_unpurgeable(msm_obj)) - return; - - if (GEM_WARN_ON(msm_obj->dontneed)) - return; - - priv->shrinkable_count += msm_obj->base.size >> PAGE_SHIFT; - msm_obj->dontneed = true; -} - -static inline void mark_unpurgeable(struct msm_gem_object *msm_obj) -{ - struct msm_drm_private *priv = msm_obj->base.dev->dev_private; - - GEM_WARN_ON(!mutex_is_locked(&priv->mm_lock)); - - if (is_unpurgeable(msm_obj)) - return; - - if (GEM_WARN_ON(!msm_obj->dontneed)) - return; - - priv->shrinkable_count -= msm_obj->base.size >> PAGE_SHIFT; - GEM_WARN_ON(priv->shrinkable_count < 0); - msm_obj->dontneed = false; -} - static inline bool is_unevictable(struct msm_gem_object *msm_obj) { return is_unpurgeable(msm_obj) || msm_obj->vaddr; } -static inline void mark_evictable(struct msm_gem_object *msm_obj) -{ - struct msm_drm_private *priv = msm_obj->base.dev->dev_private; - - WARN_ON(!mutex_is_locked(&priv->mm_lock)); - - if (is_unevictable(msm_obj)) - return; - - if (WARN_ON(msm_obj->evictable)) - return; - - priv->evictable_count += msm_obj->base.size >> PAGE_SHIFT; - msm_obj->evictable = true; -} - -static inline void mark_unevictable(struct msm_gem_object *msm_obj) -{ - struct msm_drm_private *priv = msm_obj->base.dev->dev_private; - - WARN_ON(!mutex_is_locked(&priv->mm_lock)); - - if (is_unevictable(msm_obj)) - return; - - if (WARN_ON(!msm_obj->evictable)) - return; - - priv->evictable_count -= msm_obj->base.size >> PAGE_SHIFT; - WARN_ON(priv->evictable_count < 0); - msm_obj->evictable = false; -} - void msm_gem_purge(struct drm_gem_object *obj); void msm_gem_evict(struct drm_gem_object *obj); void msm_gem_vunmap(struct drm_gem_object *obj); diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 0ab058734777..f1e52410f521 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -29,121 +29,61 @@ msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { struct msm_drm_private *priv = container_of(shrinker, struct msm_drm_private, shrinker); - unsigned count = priv->shrinkable_count; + unsigned count = priv->lru.dontneed.count; if (can_swap()) - count += priv->evictable_count; + count += priv->lru.willneed.count; return count; } static bool -purge(struct msm_gem_object *msm_obj) +purge(struct drm_gem_object *obj) { - if (!is_purgeable(msm_obj)) + if (!is_purgeable(to_msm_bo(obj))) return false; - if (msm_gem_active(&msm_obj->base)) + if (msm_gem_active(obj)) return false; - /* - * This will move the obj out of still_in_list to - * the purged list - */ - msm_gem_purge(&msm_obj->base); + msm_gem_purge(obj); return true; } static bool -evict(struct msm_gem_object *msm_obj) +evict(struct drm_gem_object *obj) { - if (is_unevictable(msm_obj)) + if (is_unevictable(to_msm_bo(obj))) return false; - if (msm_gem_active(&msm_obj->base)) + if (msm_gem_active(obj)) return false; - msm_gem_evict(&msm_obj->base); + msm_gem_evict(obj); return true; } static unsigned long -scan(struct msm_drm_private *priv, unsigned nr_to_scan, struct list_head *list, - bool (*shrink)(struct msm_gem_object *msm_obj)) -{ - unsigned freed = 0; - struct list_head still_in_list; - - INIT_LIST_HEAD(&still_in_list); - - mutex_lock(&priv->mm_lock); - - while (freed < nr_to_scan) { - struct msm_gem_object *msm_obj = list_first_entry_or_null( - list, typeof(*msm_obj), mm_list); - - if (!msm_obj) - break; - - list_move_tail(&msm_obj->mm_list, &still_in_list); - - /* - * If it is in the process of being freed, msm_gem_free_object - * can be blocked on mm_lock waiting to remove it. So just - * skip it. - */ - if (!kref_get_unless_zero(&msm_obj->base.refcount)) - continue; - - /* - * Now that we own a reference, we can drop mm_lock for the - * rest of the loop body, to reduce contention with the - * retire_submit path (which could make more objects purgeable) - */ - - mutex_unlock(&priv->mm_lock); - - /* - * Note that this still needs to be trylock, since we can - * hit shrinker in response to trying to get backing pages - * for this obj (ie. while it's lock is already held) - */ - if (!msm_gem_trylock(&msm_obj->base)) - goto tail; - - if (shrink(msm_obj)) - freed += msm_obj->base.size >> PAGE_SHIFT; - - msm_gem_unlock(&msm_obj->base); - -tail: - drm_gem_object_put(&msm_obj->base); - mutex_lock(&priv->mm_lock); - } - - list_splice_tail(&still_in_list, list); - mutex_unlock(&priv->mm_lock); - - return freed; -} - -static unsigned long msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { struct msm_drm_private *priv = container_of(shrinker, struct msm_drm_private, shrinker); + long nr = sc->nr_to_scan; unsigned long freed; - freed = scan(priv, sc->nr_to_scan, &priv->inactive_dontneed, purge); + freed = drm_gem_lru_scan(&priv->lru.dontneed, nr, purge); + nr -= freed; if (freed > 0) trace_msm_gem_purge(freed << PAGE_SHIFT); - if (can_swap() && freed < sc->nr_to_scan) { - int evicted = scan(priv, sc->nr_to_scan - freed, - &priv->inactive_willneed, evict); + if (can_swap() && nr > 0) { + unsigned long evicted; + + evicted = drm_gem_lru_scan(&priv->lru.willneed, nr, evict); + nr -= evicted; if (evicted > 0) trace_msm_gem_evict(evicted << PAGE_SHIFT); @@ -179,12 +119,12 @@ msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan) static const int vmap_shrink_limit = 15; static bool -vmap_shrink(struct msm_gem_object *msm_obj) +vmap_shrink(struct drm_gem_object *obj) { - if (!is_vunmapable(msm_obj)) + if (!is_vunmapable(to_msm_bo(obj))) return false; - msm_gem_vunmap(&msm_obj->base); + msm_gem_vunmap(obj); return true; } @@ -194,17 +134,18 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) { struct msm_drm_private *priv = container_of(nb, struct msm_drm_private, vmap_notifier); - struct list_head *mm_lists[] = { - &priv->inactive_dontneed, - &priv->inactive_willneed, - priv->gpu ? &priv->gpu->active_list : NULL, + struct drm_gem_lru *lrus[] = { + &priv->lru.dontneed, + &priv->lru.willneed, + &priv->lru.pinned, NULL, }; unsigned idx, unmapped = 0; - for (idx = 0; mm_lists[idx] && unmapped < vmap_shrink_limit; idx++) { - unmapped += scan(priv, vmap_shrink_limit - unmapped, - mm_lists[idx], vmap_shrink); + for (idx = 0; lrus[idx] && unmapped < vmap_shrink_limit; idx++) { + unmapped += drm_gem_lru_scan(lrus[idx], + vmap_shrink_limit - unmapped, + vmap_shrink); } *(unsigned long *)ptr += unmapped; diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index c2bfcf3f1f40..fba85f894314 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -846,7 +846,6 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, sched_set_fifo_low(gpu->worker->task); - INIT_LIST_HEAD(&gpu->active_list); mutex_init(&gpu->active_lock); mutex_init(&gpu->lock); init_waitqueue_head(&gpu->retire_event); @@ -974,8 +973,6 @@ void msm_gpu_cleanup(struct msm_gpu *gpu) DBG("%s", gpu->name); - WARN_ON(!list_empty(&gpu->active_list)); - for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) { msm_ringbuffer_destroy(gpu->rb[i]); gpu->rb[i] = NULL; diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 962d2070bcdf..a0885ff99e5b 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -187,12 +187,6 @@ struct msm_gpu { */ int cur_ctx_seqno; - /* - * List of GEM active objects on this gpu. Protected by - * msm_drm_private::mm_lock - */ - struct list_head active_list; - /** * lock: * |