diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0093-drm-vc4-bo-cache-locking-fixes.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0093-drm-vc4-bo-cache-locking-fixes.patch | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0093-drm-vc4-bo-cache-locking-fixes.patch b/target/linux/brcm2708/patches-4.4/0093-drm-vc4-bo-cache-locking-fixes.patch new file mode 100644 index 0000000000..923d393edf --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0093-drm-vc4-bo-cache-locking-fixes.patch @@ -0,0 +1,147 @@ +From 084567d656e2876ed867c0a030dab0c2c4e38522 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Mon, 19 Oct 2015 08:23:18 -0700 +Subject: [PATCH 093/127] drm/vc4: bo cache locking fixes. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_bo.c | 32 ++++++++++++++++++-------------- + drivers/gpu/drm/vc4/vc4_drv.h | 2 +- + 2 files changed, 19 insertions(+), 15 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_bo.c ++++ b/drivers/gpu/drm/vc4/vc4_bo.c +@@ -112,14 +112,14 @@ void vc4_bo_cache_purge(struct drm_devic + { + struct vc4_dev *vc4 = to_vc4_dev(dev); + +- spin_lock(&vc4->bo_lock); ++ mutex_lock(&vc4->bo_lock); + while (!list_empty(&vc4->bo_cache.time_list)) { + struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list, + struct vc4_bo, unref_head); + vc4_bo_remove_from_cache(bo); + vc4_bo_destroy(bo); + } +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + } + + struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size) +@@ -134,18 +134,18 @@ struct vc4_bo *vc4_bo_create(struct drm_ + return NULL; + + /* First, try to get a vc4_bo from the kernel BO cache. */ +- spin_lock(&vc4->bo_lock); ++ mutex_lock(&vc4->bo_lock); + if (page_index < vc4->bo_cache.size_list_size && + !list_empty(&vc4->bo_cache.size_list[page_index])) { + struct vc4_bo *bo = + list_first_entry(&vc4->bo_cache.size_list[page_index], + struct vc4_bo, size_head); + vc4_bo_remove_from_cache(bo); +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + kref_init(&bo->base.base.refcount); + return bo; + } +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + + /* Otherwise, make a new BO. */ + for (pass = 0; ; pass++) { +@@ -215,7 +215,7 @@ vc4_bo_cache_free_old(struct drm_device + struct vc4_dev *vc4 = to_vc4_dev(dev); + unsigned long expire_time = jiffies - msecs_to_jiffies(1000); + +- spin_lock(&vc4->bo_lock); ++ mutex_lock(&vc4->bo_lock); + while (!list_empty(&vc4->bo_cache.time_list)) { + struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list, + struct vc4_bo, unref_head); +@@ -223,14 +223,14 @@ vc4_bo_cache_free_old(struct drm_device + mod_timer(&vc4->bo_cache.time_timer, + round_jiffies_up(jiffies + + msecs_to_jiffies(1000))); +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + return; + } + + vc4_bo_remove_from_cache(bo); + vc4_bo_destroy(bo); + } +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + } + + /* Called on the last userspace/kernel unreference of the BO. Returns +@@ -248,21 +248,25 @@ void vc4_free_object(struct drm_gem_obje + /* If the object references someone else's memory, we can't cache it. + */ + if (gem_bo->import_attach) { ++ mutex_lock(&vc4->bo_lock); + vc4_bo_destroy(bo); ++ mutex_unlock(&vc4->bo_lock); + return; + } + + /* Don't cache if it was publicly named. */ + if (gem_bo->name) { ++ mutex_lock(&vc4->bo_lock); + vc4_bo_destroy(bo); ++ mutex_unlock(&vc4->bo_lock); + return; + } + +- spin_lock(&vc4->bo_lock); ++ mutex_lock(&vc4->bo_lock); + cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size); + if (!cache_list) { + vc4_bo_destroy(bo); +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + return; + } + +@@ -278,7 +282,7 @@ void vc4_free_object(struct drm_gem_obje + + vc4->bo_stats.num_cached++; + vc4->bo_stats.size_cached += gem_bo->size; +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + + vc4_bo_cache_free_old(dev); + } +@@ -465,7 +469,7 @@ void vc4_bo_cache_init(struct drm_device + { + struct vc4_dev *vc4 = to_vc4_dev(dev); + +- spin_lock_init(&vc4->bo_lock); ++ mutex_init(&vc4->bo_lock); + + INIT_LIST_HEAD(&vc4->bo_cache.time_list); + +@@ -498,9 +502,9 @@ int vc4_bo_stats_debugfs(struct seq_file + struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_bo_stats stats; + +- spin_lock(&vc4->bo_lock); ++ mutex_lock(&vc4->bo_lock); + stats = vc4->bo_stats; +- spin_unlock(&vc4->bo_lock); ++ mutex_unlock(&vc4->bo_lock); + + seq_printf(m, "num bos allocated: %d\n", stats.num_allocated); + seq_printf(m, "size bos allocated: %dkb\n", stats.size_allocated / 1024); +--- a/drivers/gpu/drm/vc4/vc4_drv.h ++++ b/drivers/gpu/drm/vc4/vc4_drv.h +@@ -49,7 +49,7 @@ struct vc4_dev { + } bo_stats; + + /* Protects bo_cache and the BO stats. */ +- spinlock_t bo_lock; ++ struct mutex bo_lock; + + /* Sequence number for the last job queued in job_list. + * Starts at 0 (no jobs emitted). |