2b1c6b21b5
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also adds support for Raspberry Pi Compute Module 3 (untested). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
147 lines
4.3 KiB
Diff
147 lines
4.3 KiB
Diff
From 99cab11df7185247a24977d8cbcf5d660d0f861b Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Mon, 19 Oct 2015 08:23:18 -0700
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Subject: [PATCH] drm/vc4: bo cache locking fixes.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_bo.c | 32 ++++++++++++++++++--------------
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drivers/gpu/drm/vc4/vc4_drv.h | 2 +-
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2 files changed, 19 insertions(+), 15 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_bo.c
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+++ b/drivers/gpu/drm/vc4/vc4_bo.c
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@@ -112,14 +112,14 @@ void vc4_bo_cache_purge(struct drm_devic
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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- spin_lock(&vc4->bo_lock);
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+ mutex_lock(&vc4->bo_lock);
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while (!list_empty(&vc4->bo_cache.time_list)) {
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struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
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struct vc4_bo, unref_head);
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vc4_bo_remove_from_cache(bo);
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vc4_bo_destroy(bo);
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}
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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}
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struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size)
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@@ -134,18 +134,18 @@ struct vc4_bo *vc4_bo_create(struct drm_
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return NULL;
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/* First, try to get a vc4_bo from the kernel BO cache. */
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- spin_lock(&vc4->bo_lock);
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+ mutex_lock(&vc4->bo_lock);
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if (page_index < vc4->bo_cache.size_list_size &&
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!list_empty(&vc4->bo_cache.size_list[page_index])) {
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struct vc4_bo *bo =
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list_first_entry(&vc4->bo_cache.size_list[page_index],
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struct vc4_bo, size_head);
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vc4_bo_remove_from_cache(bo);
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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kref_init(&bo->base.base.refcount);
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return bo;
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}
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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/* Otherwise, make a new BO. */
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for (pass = 0; ; pass++) {
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@@ -215,7 +215,7 @@ vc4_bo_cache_free_old(struct drm_device
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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unsigned long expire_time = jiffies - msecs_to_jiffies(1000);
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- spin_lock(&vc4->bo_lock);
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+ mutex_lock(&vc4->bo_lock);
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while (!list_empty(&vc4->bo_cache.time_list)) {
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struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
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struct vc4_bo, unref_head);
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@@ -223,14 +223,14 @@ vc4_bo_cache_free_old(struct drm_device
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mod_timer(&vc4->bo_cache.time_timer,
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round_jiffies_up(jiffies +
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msecs_to_jiffies(1000)));
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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return;
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}
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vc4_bo_remove_from_cache(bo);
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vc4_bo_destroy(bo);
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}
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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}
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/* Called on the last userspace/kernel unreference of the BO. Returns
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@@ -248,21 +248,25 @@ void vc4_free_object(struct drm_gem_obje
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/* If the object references someone else's memory, we can't cache it.
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*/
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if (gem_bo->import_attach) {
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+ mutex_lock(&vc4->bo_lock);
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vc4_bo_destroy(bo);
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+ mutex_unlock(&vc4->bo_lock);
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return;
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}
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/* Don't cache if it was publicly named. */
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if (gem_bo->name) {
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+ mutex_lock(&vc4->bo_lock);
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vc4_bo_destroy(bo);
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+ mutex_unlock(&vc4->bo_lock);
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return;
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}
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- spin_lock(&vc4->bo_lock);
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+ mutex_lock(&vc4->bo_lock);
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cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
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if (!cache_list) {
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vc4_bo_destroy(bo);
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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return;
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}
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@@ -278,7 +282,7 @@ void vc4_free_object(struct drm_gem_obje
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vc4->bo_stats.num_cached++;
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vc4->bo_stats.size_cached += gem_bo->size;
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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vc4_bo_cache_free_old(dev);
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}
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@@ -465,7 +469,7 @@ void vc4_bo_cache_init(struct drm_device
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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- spin_lock_init(&vc4->bo_lock);
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+ mutex_init(&vc4->bo_lock);
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INIT_LIST_HEAD(&vc4->bo_cache.time_list);
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@@ -498,9 +502,9 @@ int vc4_bo_stats_debugfs(struct seq_file
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct vc4_bo_stats stats;
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- spin_lock(&vc4->bo_lock);
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+ mutex_lock(&vc4->bo_lock);
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stats = vc4->bo_stats;
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- spin_unlock(&vc4->bo_lock);
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+ mutex_unlock(&vc4->bo_lock);
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seq_printf(m, "num bos allocated: %d\n", stats.num_allocated);
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seq_printf(m, "size bos allocated: %dkb\n", stats.size_allocated / 1024);
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--- a/drivers/gpu/drm/vc4/vc4_drv.h
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+++ b/drivers/gpu/drm/vc4/vc4_drv.h
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@@ -49,7 +49,7 @@ struct vc4_dev {
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} bo_stats;
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/* Protects bo_cache and the BO stats. */
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- spinlock_t bo_lock;
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+ struct mutex bo_lock;
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/* Sequence number for the last job queued in job_list.
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* Starts at 0 (no jobs emitted).
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