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Message-Id: <20221105232719.302619-4-dmitry.osipenko@collabora.com>
Date: Sun, 6 Nov 2022 02:27:15 +0300
From: Dmitry Osipenko <dmitry.osipenko@...labora.com>
To: David Airlie <airlied@...ux.ie>, Gerd Hoffmann <kraxel@...hat.com>,
Gurchetan Singh <gurchetansingh@...omium.org>,
Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Daniel Almeida <daniel.almeida@...labora.com>,
Gustavo Padovan <gustavo.padovan@...labora.com>,
Daniel Stone <daniel@...ishbar.org>,
Tomeu Vizoso <tomeu.vizoso@...labora.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Rob Clark <robdclark@...il.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
Christian König <christian.koenig@....com>,
Qiang Yu <yuq825@...il.com>,
Steven Price <steven.price@....com>,
Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
Rob Herring <robh@...nel.org>, Sean Paul <sean@...rly.run>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Dmitry Osipenko <digetx@...il.com>, kernel@...labora.com,
virtualization@...ts.linux-foundation.org
Subject: [PATCH v8 3/7] drm/shmem-helper: Switch to reservation lock
Replace all drm-shmem locks with a GEM reservation lock. This makes locks
consistent with dma-buf locking convention where importers are responsible
for holding reservation lock for all operations performed over dma-bufs,
preventing deadlock between dma-buf importers and exporters.
Suggested-by: Daniel Vetter <daniel@...ll.ch>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
---
drivers/gpu/drm/drm_gem_shmem_helper.c | 184 +++++++-----------
drivers/gpu/drm/lima/lima_gem.c | 8 +-
drivers/gpu/drm/panfrost/panfrost_drv.c | 7 +-
.../gpu/drm/panfrost/panfrost_gem_shrinker.c | 6 +-
drivers/gpu/drm/panfrost/panfrost_mmu.c | 19 +-
include/drm/drm_gem_shmem_helper.h | 14 +-
6 files changed, 95 insertions(+), 143 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 801033b48893..d6e62f228989 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -86,8 +86,6 @@ __drm_gem_shmem_create(struct drm_device *dev, size_t size, bool private)
if (ret)
goto err_release;
- mutex_init(&shmem->pages_lock);
- mutex_init(&shmem->vmap_lock);
INIT_LIST_HEAD(&shmem->madv_list);
if (!private) {
@@ -139,11 +137,13 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem)
{
struct drm_gem_object *obj = &shmem->base;
- WARN_ON(shmem->vmap_use_count);
-
if (obj->import_attach) {
drm_prime_gem_destroy(obj, shmem->sgt);
} else {
+ dma_resv_lock(shmem->base.resv, NULL);
+
+ WARN_ON(shmem->vmap_use_count);
+
if (shmem->sgt) {
dma_unmap_sgtable(obj->dev->dev, shmem->sgt,
DMA_BIDIRECTIONAL, 0);
@@ -152,18 +152,18 @@ void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem)
}
if (shmem->pages)
drm_gem_shmem_put_pages(shmem);
- }
- WARN_ON(shmem->pages_use_count);
+ WARN_ON(shmem->pages_use_count);
+
+ dma_resv_unlock(shmem->base.resv);
+ }
drm_gem_object_release(obj);
- mutex_destroy(&shmem->pages_lock);
- mutex_destroy(&shmem->vmap_lock);
kfree(shmem);
}
EXPORT_SYMBOL_GPL(drm_gem_shmem_free);
-static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem)
+static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem)
{
struct drm_gem_object *obj = &shmem->base;
struct page **pages;
@@ -194,35 +194,17 @@ static int drm_gem_shmem_get_pages_locked(struct drm_gem_shmem_object *shmem)
}
/*
- * drm_gem_shmem_get_pages - Allocate backing pages for a shmem GEM object
+ * drm_gem_shmem_put_pages - Decrease use count on the backing pages for a shmem GEM object
* @shmem: shmem GEM object
*
- * This function makes sure that backing pages exists for the shmem GEM object
- * and increases the use count.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
+ * This function decreases the use count and puts the backing pages when use drops to zero.
*/
-int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem)
-{
- int ret;
-
- WARN_ON(shmem->base.import_attach);
-
- ret = mutex_lock_interruptible(&shmem->pages_lock);
- if (ret)
- return ret;
- ret = drm_gem_shmem_get_pages_locked(shmem);
- mutex_unlock(&shmem->pages_lock);
-
- return ret;
-}
-EXPORT_SYMBOL(drm_gem_shmem_get_pages);
-
-static void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem)
+void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem)
{
struct drm_gem_object *obj = &shmem->base;
+ dma_resv_assert_held(shmem->base.resv);
+
if (WARN_ON_ONCE(!shmem->pages_use_count))
return;
@@ -239,19 +221,6 @@ static void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem)
shmem->pages_mark_accessed_on_put);
shmem->pages = NULL;
}
-
-/*
- * drm_gem_shmem_put_pages - Decrease use count on the backing pages for a shmem GEM object
- * @shmem: shmem GEM object
- *
- * This function decreases the use count and puts the backing pages when use drops to zero.
- */
-void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem)
-{
- mutex_lock(&shmem->pages_lock);
- drm_gem_shmem_put_pages_locked(shmem);
- mutex_unlock(&shmem->pages_lock);
-}
EXPORT_SYMBOL(drm_gem_shmem_put_pages);
/**
@@ -266,6 +235,8 @@ EXPORT_SYMBOL(drm_gem_shmem_put_pages);
*/
int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem)
{
+ dma_resv_assert_held(shmem->base.resv);
+
WARN_ON(shmem->base.import_attach);
return drm_gem_shmem_get_pages(shmem);
@@ -281,14 +252,31 @@ EXPORT_SYMBOL(drm_gem_shmem_pin);
*/
void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem)
{
+ dma_resv_assert_held(shmem->base.resv);
+
WARN_ON(shmem->base.import_attach);
drm_gem_shmem_put_pages(shmem);
}
EXPORT_SYMBOL(drm_gem_shmem_unpin);
-static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
- struct iosys_map *map)
+/*
+ * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object
+ * @shmem: shmem GEM object
+ * @map: Returns the kernel virtual address of the SHMEM GEM object's backing
+ * store.
+ *
+ * This function makes sure that a contiguous kernel virtual address mapping
+ * exists for the buffer backing the shmem GEM object. It hides the differences
+ * between dma-buf imported and natively allocated objects.
+ *
+ * Acquired mappings should be cleaned up by calling drm_gem_shmem_vunmap().
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ */
+int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem,
+ struct iosys_map *map)
{
struct drm_gem_object *obj = &shmem->base;
int ret = 0;
@@ -304,6 +292,8 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
} else {
pgprot_t prot = PAGE_KERNEL;
+ dma_resv_assert_held(shmem->base.resv);
+
if (shmem->vmap_use_count++ > 0) {
iosys_map_set_vaddr(map, shmem->vaddr);
return 0;
@@ -338,45 +328,30 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
return ret;
}
+EXPORT_SYMBOL(drm_gem_shmem_vmap);
/*
- * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object
+ * drm_gem_shmem_vunmap - Unmap a virtual mapping for a shmem GEM object
* @shmem: shmem GEM object
- * @map: Returns the kernel virtual address of the SHMEM GEM object's backing
- * store.
- *
- * This function makes sure that a contiguous kernel virtual address mapping
- * exists for the buffer backing the shmem GEM object. It hides the differences
- * between dma-buf imported and natively allocated objects.
+ * @map: Kernel virtual address where the SHMEM GEM object was mapped
*
- * Acquired mappings should be cleaned up by calling drm_gem_shmem_vunmap().
+ * This function cleans up a kernel virtual address mapping acquired by
+ * drm_gem_shmem_vmap(). The mapping is only removed when the use count drops to
+ * zero.
*
- * Returns:
- * 0 on success or a negative error code on failure.
+ * This function hides the differences between dma-buf imported and natively
+ * allocated objects.
*/
-int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem,
- struct iosys_map *map)
-{
- int ret;
-
- ret = mutex_lock_interruptible(&shmem->vmap_lock);
- if (ret)
- return ret;
- ret = drm_gem_shmem_vmap_locked(shmem, map);
- mutex_unlock(&shmem->vmap_lock);
-
- return ret;
-}
-EXPORT_SYMBOL(drm_gem_shmem_vmap);
-
-static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
- struct iosys_map *map)
+void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
+ struct iosys_map *map)
{
struct drm_gem_object *obj = &shmem->base;
if (obj->import_attach) {
dma_buf_vunmap(obj->import_attach->dmabuf, map);
} else {
+ dma_resv_assert_held(shmem->base.resv);
+
if (WARN_ON_ONCE(!shmem->vmap_use_count))
return;
@@ -389,26 +364,6 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
shmem->vaddr = NULL;
}
-
-/*
- * drm_gem_shmem_vunmap - Unmap a virtual mapping for a shmem GEM object
- * @shmem: shmem GEM object
- * @map: Kernel virtual address where the SHMEM GEM object was mapped
- *
- * This function cleans up a kernel virtual address mapping acquired by
- * drm_gem_shmem_vmap(). The mapping is only removed when the use count drops to
- * zero.
- *
- * This function hides the differences between dma-buf imported and natively
- * allocated objects.
- */
-void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
- struct iosys_map *map)
-{
- mutex_lock(&shmem->vmap_lock);
- drm_gem_shmem_vunmap_locked(shmem, map);
- mutex_unlock(&shmem->vmap_lock);
-}
EXPORT_SYMBOL(drm_gem_shmem_vunmap);
static struct drm_gem_shmem_object *
@@ -441,24 +396,24 @@ drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
*/
int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv)
{
- mutex_lock(&shmem->pages_lock);
+ dma_resv_assert_held(shmem->base.resv);
if (shmem->madv >= 0)
shmem->madv = madv;
madv = shmem->madv;
- mutex_unlock(&shmem->pages_lock);
-
return (madv >= 0);
}
EXPORT_SYMBOL(drm_gem_shmem_madvise);
-void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem)
+void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem)
{
struct drm_gem_object *obj = &shmem->base;
struct drm_device *dev = obj->dev;
+ dma_resv_assert_held(shmem->base.resv);
+
WARN_ON(!drm_gem_shmem_is_purgeable(shmem));
dma_unmap_sgtable(dev->dev, shmem->sgt, DMA_BIDIRECTIONAL, 0);
@@ -466,7 +421,7 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem)
kfree(shmem->sgt);
shmem->sgt = NULL;
- drm_gem_shmem_put_pages_locked(shmem);
+ drm_gem_shmem_put_pages(shmem);
shmem->madv = -1;
@@ -482,17 +437,6 @@ void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem)
invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1);
}
-EXPORT_SYMBOL(drm_gem_shmem_purge_locked);
-
-bool drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem)
-{
- if (!mutex_trylock(&shmem->pages_lock))
- return false;
- drm_gem_shmem_purge_locked(shmem);
- mutex_unlock(&shmem->pages_lock);
-
- return true;
-}
EXPORT_SYMBOL(drm_gem_shmem_purge);
/**
@@ -548,7 +492,7 @@ static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
/* We don't use vmf->pgoff since that has the fake offset */
page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
- mutex_lock(&shmem->pages_lock);
+ dma_resv_lock(shmem->base.resv, NULL);
if (page_offset >= num_pages ||
WARN_ON_ONCE(!shmem->pages) ||
@@ -560,7 +504,7 @@ static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
ret = vmf_insert_pfn(vma, vmf->address, page_to_pfn(page));
}
- mutex_unlock(&shmem->pages_lock);
+ dma_resv_unlock(shmem->base.resv);
return ret;
}
@@ -573,8 +517,10 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
WARN_ON(shmem->base.import_attach);
+ dma_resv_lock(shmem->base.resv, NULL);
ret = drm_gem_shmem_get_pages(shmem);
WARN_ON_ONCE(ret != 0);
+ dma_resv_unlock(shmem->base.resv);
drm_gem_vm_open(vma);
}
@@ -584,7 +530,10 @@ static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
struct drm_gem_object *obj = vma->vm_private_data;
struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
+ dma_resv_lock(shmem->base.resv, NULL);
drm_gem_shmem_put_pages(shmem);
+ dma_resv_unlock(shmem->base.resv);
+
drm_gem_vm_close(vma);
}
@@ -619,7 +568,10 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct
return dma_buf_mmap(obj->dma_buf, vma, 0);
}
+ dma_resv_lock(shmem->base.resv, NULL);
ret = drm_gem_shmem_get_pages(shmem);
+ dma_resv_unlock(shmem->base.resv);
+
if (ret) {
drm_gem_vm_close(vma);
return ret;
@@ -707,9 +659,11 @@ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
WARN_ON(obj->import_attach);
+ dma_resv_lock(shmem->base.resv, NULL);
+
ret = drm_gem_shmem_get_pages(shmem);
if (ret)
- return ERR_PTR(ret);
+ goto err_unlock;
sgt = drm_gem_shmem_get_sg_table(shmem);
if (IS_ERR(sgt)) {
@@ -723,6 +677,8 @@ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
shmem->sgt = sgt;
+ dma_resv_unlock(shmem->base.resv);
+
return sgt;
err_free_sgt:
@@ -730,6 +686,8 @@ struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem)
kfree(sgt);
err_put_pages:
drm_gem_shmem_put_pages(shmem);
+err_unlock:
+ dma_resv_unlock(shmem->base.resv);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages_sgt);
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
index 0f1ca0b0db49..5008f0c2428f 100644
--- a/drivers/gpu/drm/lima/lima_gem.c
+++ b/drivers/gpu/drm/lima/lima_gem.c
@@ -34,7 +34,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
new_size = min(new_size, bo->base.base.size);
- mutex_lock(&bo->base.pages_lock);
+ dma_resv_lock(bo->base.base.resv, NULL);
if (bo->base.pages) {
pages = bo->base.pages;
@@ -42,7 +42,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
sizeof(*pages), GFP_KERNEL | __GFP_ZERO);
if (!pages) {
- mutex_unlock(&bo->base.pages_lock);
+ dma_resv_unlock(bo->base.base.resv);
return -ENOMEM;
}
@@ -56,13 +56,13 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
struct page *page = shmem_read_mapping_page(mapping, i);
if (IS_ERR(page)) {
- mutex_unlock(&bo->base.pages_lock);
+ dma_resv_unlock(bo->base.base.resv);
return PTR_ERR(page);
}
pages[i] = page;
}
- mutex_unlock(&bo->base.pages_lock);
+ dma_resv_unlock(bo->base.base.resv);
ret = sg_alloc_table_from_pages(&sgt, pages, i, 0,
new_size, GFP_KERNEL);
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 2fa5afe21288..94b8e6de34b8 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -405,6 +405,10 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
bo = to_panfrost_bo(gem_obj);
+ ret = dma_resv_lock_interruptible(bo->base.base.resv, NULL);
+ if (ret)
+ goto out_put_object;
+
mutex_lock(&pfdev->shrinker_lock);
mutex_lock(&bo->mappings.lock);
if (args->madv == PANFROST_MADV_DONTNEED) {
@@ -442,7 +446,8 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
out_unlock_mappings:
mutex_unlock(&bo->mappings.lock);
mutex_unlock(&pfdev->shrinker_lock);
-
+ dma_resv_unlock(bo->base.base.resv);
+out_put_object:
drm_gem_object_put(gem_obj);
return ret;
}
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
index bf0170782f25..6a71a2555f85 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
@@ -48,14 +48,14 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj)
if (!mutex_trylock(&bo->mappings.lock))
return false;
- if (!mutex_trylock(&shmem->pages_lock))
+ if (!dma_resv_trylock(shmem->base.resv))
goto unlock_mappings;
panfrost_gem_teardown_mappings_locked(bo);
- drm_gem_shmem_purge_locked(&bo->base);
+ drm_gem_shmem_purge(&bo->base);
ret = true;
- mutex_unlock(&shmem->pages_lock);
+ dma_resv_unlock(shmem->base.resv);
unlock_mappings:
mutex_unlock(&bo->mappings.lock);
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index e246d914e7f6..0d5a75b23ed2 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -434,6 +434,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
struct panfrost_gem_mapping *bomapping;
struct panfrost_gem_object *bo;
struct address_space *mapping;
+ struct drm_gem_object *obj;
pgoff_t page_offset;
struct sg_table *sgt;
struct page **pages;
@@ -456,15 +457,16 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
page_offset = addr >> PAGE_SHIFT;
page_offset -= bomapping->mmnode.start;
- mutex_lock(&bo->base.pages_lock);
+ obj = &bo->base.base;
+
+ dma_resv_lock(obj->resv, NULL);
if (!bo->base.pages) {
bo->sgts = kvmalloc_array(bo->base.base.size / SZ_2M,
sizeof(struct sg_table), GFP_KERNEL | __GFP_ZERO);
if (!bo->sgts) {
- mutex_unlock(&bo->base.pages_lock);
ret = -ENOMEM;
- goto err_bo;
+ goto err_unlock;
}
pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
@@ -472,9 +474,8 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
if (!pages) {
kvfree(bo->sgts);
bo->sgts = NULL;
- mutex_unlock(&bo->base.pages_lock);
ret = -ENOMEM;
- goto err_bo;
+ goto err_unlock;
}
bo->base.pages = pages;
bo->base.pages_use_count = 1;
@@ -482,7 +483,6 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
pages = bo->base.pages;
if (pages[page_offset]) {
/* Pages are already mapped, bail out. */
- mutex_unlock(&bo->base.pages_lock);
goto out;
}
}
@@ -493,14 +493,11 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
for (i = page_offset; i < page_offset + NUM_FAULT_PAGES; i++) {
pages[i] = shmem_read_mapping_page(mapping, i);
if (IS_ERR(pages[i])) {
- mutex_unlock(&bo->base.pages_lock);
ret = PTR_ERR(pages[i]);
goto err_pages;
}
}
- mutex_unlock(&bo->base.pages_lock);
-
sgt = &bo->sgts[page_offset / (SZ_2M / PAGE_SIZE)];
ret = sg_alloc_table_from_pages(sgt, pages + page_offset,
NUM_FAULT_PAGES, 0, SZ_2M, GFP_KERNEL);
@@ -519,6 +516,8 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
dev_dbg(pfdev->dev, "mapped page fault @ AS%d %llx", as, addr);
out:
+ dma_resv_unlock(obj->resv);
+
panfrost_gem_mapping_put(bomapping);
return 0;
@@ -527,6 +526,8 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
sg_free_table(sgt);
err_pages:
drm_gem_shmem_put_pages(&bo->base);
+err_unlock:
+ dma_resv_unlock(obj->resv);
err_bo:
panfrost_gem_mapping_put(bomapping);
return ret;
diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index a2201b2488c5..3b055d238584 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -26,11 +26,6 @@ struct drm_gem_shmem_object {
*/
struct drm_gem_object base;
- /**
- * @pages_lock: Protects the page table and use count
- */
- struct mutex pages_lock;
-
/**
* @pages: Page table
*/
@@ -79,11 +74,6 @@ struct drm_gem_shmem_object {
*/
struct sg_table *sgt;
- /**
- * @vmap_lock: Protects the vmap address and use count
- */
- struct mutex vmap_lock;
-
/**
* @vaddr: Kernel virtual address of the backing memory
*/
@@ -109,7 +99,6 @@ struct drm_gem_shmem_object {
struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem);
-int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem);
void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem);
@@ -128,8 +117,7 @@ static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem
!shmem->base.dma_buf && !shmem->base.import_attach;
}
-void drm_gem_shmem_purge_locked(struct drm_gem_shmem_object *shmem);
-bool drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem);
+void drm_gem_shmem_purge(struct drm_gem_shmem_object *shmem);
struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_shmem_object *shmem);
struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_shmem_object *shmem);
--
2.37.3
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