Add _unlocked postfix to the dma-buf API function names in a preparation to move all non-dynamic dma-buf users over to the dynamic locking specification. This patch only renames API functions, preparing drivers to the common locking convention. Later on we will make the "unlocked" functions to take the reservation lock.

Suggested-by: Christian König christian.koenig@amd.com Signed-off-by: Dmitry Osipenko dmitry.osipenko@collabora.com --- drivers/dma-buf/dma-buf.c | 76 ++++++++++--------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 +- drivers/gpu/drm/armada/armada_gem.c | 14 ++-- drivers/gpu/drm/drm_gem_cma_helper.c | 6 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +- drivers/gpu/drm/drm_prime.c | 12 +-- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 6 +- drivers/gpu/drm/exynos/exynos_drm_gem.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 12 +-- .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 20 ++--- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 8 +- drivers/gpu/drm/tegra/gem.c | 27 +++---- drivers/infiniband/core/umem_dmabuf.c | 11 +-- .../common/videobuf2/videobuf2-dma-contig.c | 15 ++-- .../media/common/videobuf2/videobuf2-dma-sg.c | 12 +-- .../common/videobuf2/videobuf2-vmalloc.c | 6 +- .../platform/nvidia/tegra-vde/dmabuf-cache.c | 12 +-- drivers/misc/fastrpc.c | 12 +-- drivers/xen/gntdev-dmabuf.c | 14 ++-- include/linux/dma-buf.h | 34 +++++---- 21 files changed, 161 insertions(+), 152 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 44574fbe7482..d16237a6ffaa 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -795,7 +795,7 @@ static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach, }

/** - * dma_buf_dynamic_attach - Add the device to dma_buf's attachments list + * dma_buf_dynamic_attach_unlocked - Add the device to dma_buf's attachments list * @dmabuf: [in] buffer to attach device to. * @dev: [in] device to be attached. * @importer_ops: [in] importer operations for the attachment @@ -817,9 +817,9 @@ static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach, * indicated with the error code -EBUSY. */ struct dma_buf_attachment * -dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, - const struct dma_buf_attach_ops *importer_ops, - void *importer_priv) +dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, + const struct dma_buf_attach_ops *importer_ops, + void *importer_priv) { struct dma_buf_attachment *attach; int ret; @@ -892,25 +892,25 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, if (dma_buf_is_dynamic(attach->dmabuf)) dma_resv_unlock(attach->dmabuf->resv);

- dma_buf_detach(dmabuf, attach); + dma_buf_detach_unlocked(dmabuf, attach); return ERR_PTR(ret); } -EXPORT_SYMBOL_NS_GPL(dma_buf_dynamic_attach, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_dynamic_attach_unlocked, DMA_BUF);

/** - * dma_buf_attach - Wrapper for dma_buf_dynamic_attach + * dma_buf_attach_unlocked - Wrapper for dma_buf_dynamic_attach * @dmabuf: [in] buffer to attach device to. * @dev: [in] device to be attached. * - * Wrapper to call dma_buf_dynamic_attach() for drivers which still use a static - * mapping. + * Wrapper to call dma_buf_dynamic_attach_unlocked() for drivers which still + * use a static mapping. */ -struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, - struct device *dev) +struct dma_buf_attachment *dma_buf_attach_unlocked(struct dma_buf *dmabuf, + struct device *dev) { - return dma_buf_dynamic_attach(dmabuf, dev, NULL, NULL); + return dma_buf_dynamic_attach_unlocked(dmabuf, dev, NULL, NULL); } -EXPORT_SYMBOL_NS_GPL(dma_buf_attach, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_attach_unlocked, DMA_BUF);

static void __unmap_dma_buf(struct dma_buf_attachment *attach, struct sg_table *sg_table, @@ -923,7 +923,7 @@ static void __unmap_dma_buf(struct dma_buf_attachment *attach, }

/** - * dma_buf_detach - Remove the given attachment from dmabuf's attachments list + * dma_buf_detach_unlocked - Remove the given attachment from dmabuf's attachments list * @dmabuf: [in] buffer to detach from. * @attach: [in] attachment to be detached; is free'd after this call. * @@ -931,7 +931,8 @@ static void __unmap_dma_buf(struct dma_buf_attachment *attach, * * Optionally this calls &dma_buf_ops.detach for device-specific detach. */ -void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) +void dma_buf_detach_unlocked(struct dma_buf *dmabuf, + struct dma_buf_attachment *attach) { if (WARN_ON(!dmabuf || !attach)) return; @@ -956,14 +957,14 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)

kfree(attach); } -EXPORT_SYMBOL_NS_GPL(dma_buf_detach, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_detach_unlocked, DMA_BUF);

/** * dma_buf_pin - Lock down the DMA-buf * @attach: [in] attachment which should be pinned * - * Only dynamic importers (who set up @attach with dma_buf_dynamic_attach()) may - * call this, and only for limited use cases like scanout and not for temporary + * Only dynamic importers (who set up @attach with dma_buf_dynamic_attach_unlocked()) + * may call this, and only for limited use cases like scanout and not for temporary * pin operations. It is not permitted to allow userspace to pin arbitrary * amounts of buffers through this interface. * @@ -1010,7 +1011,7 @@ void dma_buf_unpin(struct dma_buf_attachment *attach) EXPORT_SYMBOL_NS_GPL(dma_buf_unpin, DMA_BUF);

/** - * dma_buf_map_attachment - Returns the scatterlist table of the attachment; + * dma_buf_map_attachment_locked - Returns the scatterlist table of the attachment; * mapped into _device_ address space. Is a wrapper for map_dma_buf() of the * dma_buf_ops. * @attach: [in] attachment whose scatterlist is to be returned @@ -1030,8 +1031,9 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_unpin, DMA_BUF); * Important: Dynamic importers must wait for the exclusive fence of the struct * dma_resv attached to the DMA-BUF first. */ -struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, - enum dma_data_direction direction) +struct sg_table * +dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, + enum dma_data_direction direction) { struct sg_table *sg_table; int r; @@ -1097,10 +1099,10 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, #endif /* CONFIG_DMA_API_DEBUG */ return sg_table; } -EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment_unlocked, DMA_BUF);

/** - * dma_buf_unmap_attachment - unmaps and decreases usecount of the buffer;might + * dma_buf_unmap_attachment_unlocked - unmaps and decreases usecount of the buffer;might * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of * dma_buf_ops. * @attach: [in] attachment to unmap buffer from @@ -1109,9 +1111,9 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment, DMA_BUF); * * This unmaps a DMA mapping for @attached obtained by dma_buf_map_attachment(). */ -void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, - struct sg_table *sg_table, - enum dma_data_direction direction) +void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach, + struct sg_table *sg_table, + enum dma_data_direction direction) { might_sleep();

@@ -1133,7 +1135,7 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, !IS_ENABLED(CONFIG_DMABUF_MOVE_NOTIFY)) dma_buf_unpin(attach); } -EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment_unlocked, DMA_BUF);

/** * dma_buf_move_notify - notify attachments that DMA-buf is moving @@ -1330,7 +1332,7 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_end_cpu_access, DMA_BUF);

/** - * dma_buf_mmap - Setup up a userspace mmap with the given vma + * dma_buf_mmap_unlocked - Setup up a userspace mmap with the given vma * @dmabuf: [in] buffer that should back the vma * @vma: [in] vma for the mmap * @pgoff: [in] offset in pages where this mmap should start within the @@ -1343,8 +1345,8 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_end_cpu_access, DMA_BUF); * * Can return negative error values, returns 0 on success. */ -int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, - unsigned long pgoff) +int dma_buf_mmap_unlocked(struct dma_buf *dmabuf, struct vm_area_struct *vma, + unsigned long pgoff) { if (WARN_ON(!dmabuf || !vma)) return -EINVAL; @@ -1368,10 +1370,10 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma,

return dmabuf->ops->mmap(dmabuf, vma); } -EXPORT_SYMBOL_NS_GPL(dma_buf_mmap, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_mmap_unlocked, DMA_BUF);

/** - * dma_buf_vmap - Create virtual mapping for the buffer object into kernel + * dma_buf_vmap_unlocked - Create virtual mapping for the buffer object into kernel * address space. Same restrictions as for vmap and friends apply. * @dmabuf: [in] buffer to vmap * @map: [out] returns the vmap pointer @@ -1386,7 +1388,7 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_mmap, DMA_BUF); * * Returns 0 on success, or a negative errno code otherwise. */ -int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map) +int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) { struct iosys_map ptr; int ret = 0; @@ -1422,14 +1424,14 @@ int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map) mutex_unlock(&dmabuf->lock); return ret; } -EXPORT_SYMBOL_NS_GPL(dma_buf_vmap, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_vmap_unlocked, DMA_BUF);

/** - * dma_buf_vunmap - Unmap a vmap obtained by dma_buf_vmap. + * dma_buf_vunmap_unlocked - Unmap a vmap obtained by dma_buf_vmap. * @dmabuf: [in] buffer to vunmap * @map: [in] vmap pointer to vunmap */ -void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map) +void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) { if (WARN_ON(!dmabuf)) return; @@ -1446,7 +1448,7 @@ void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map) } mutex_unlock(&dmabuf->lock); } -EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap, DMA_BUF); +EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap_unlocked, DMA_BUF);

#ifdef CONFIG_DEBUG_FS static int dma_buf_debug_show(struct seq_file *s, void *unused) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index 782cbca37538..d9ed5a4fbc6f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -449,8 +449,8 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, if (IS_ERR(obj)) return obj;

- attach = dma_buf_dynamic_attach(dma_buf, dev->dev, - &amdgpu_dma_buf_attach_ops, obj); + attach = dma_buf_dynamic_attach_unlocked(dma_buf, dev->dev, + &amdgpu_dma_buf_attach_ops, obj); if (IS_ERR(attach)) { drm_gem_object_put(obj); return ERR_CAST(attach); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 170935c294f5..e354ad140a0a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -883,7 +883,7 @@ static int amdgpu_ttm_backend_bind(struct ttm_device *bdev, struct sg_table *sgt;

attach = gtt->gobj->import_attach; - sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL); if (IS_ERR(sgt)) return PTR_ERR(sgt);

@@ -1008,7 +1008,7 @@ static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev, struct dma_buf_attachment *attach;

attach = gtt->gobj->import_attach; - dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(attach, ttm->sg, DMA_BIDIRECTIONAL); ttm->sg = NULL; }

diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c index 147abf1a3968..f71f3b2d20e3 100644 --- a/drivers/gpu/drm/armada/armada_gem.c +++ b/drivers/gpu/drm/armada/armada_gem.c @@ -66,8 +66,8 @@ void armada_gem_free_object(struct drm_gem_object *obj) if (dobj->obj.import_attach) { /* We only ever display imported data */ if (dobj->sgt) - dma_buf_unmap_attachment(dobj->obj.import_attach, - dobj->sgt, DMA_TO_DEVICE); + dma_buf_unmap_attachment_unlocked(dobj->obj.import_attach, + dobj->sgt, DMA_TO_DEVICE); drm_prime_gem_destroy(&dobj->obj, NULL); }

@@ -364,7 +364,7 @@ int armada_gem_pwrite_ioctl(struct drm_device *dev, void *data,

if (args->offset > dobj->obj.size || args->size > dobj->obj.size - args->offset) { - DRM_ERROR("invalid size: object size %u\n", dobj->obj.size); + DRM_ERROR("invalid size: object size %zu\n", dobj->obj.size); ret = -EINVAL; goto unref; } @@ -514,13 +514,13 @@ armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf) } }

- attach = dma_buf_attach(buf, dev->dev); + attach = dma_buf_attach_unlocked(buf, dev->dev); if (IS_ERR(attach)) return ERR_CAST(attach);

dobj = armada_gem_alloc_private_object(dev, buf->size); if (!dobj) { - dma_buf_detach(buf, attach); + dma_buf_detach_unlocked(buf, attach); return ERR_PTR(-ENOMEM); }

@@ -539,8 +539,8 @@ int armada_gem_map_import(struct armada_gem_object *dobj) { int ret;

- dobj->sgt = dma_buf_map_attachment(dobj->obj.import_attach, - DMA_TO_DEVICE); + dobj->sgt = dma_buf_map_attachment_unlocked(dobj->obj.import_attach, + DMA_TO_DEVICE); if (IS_ERR(dobj->sgt)) { ret = PTR_ERR(dobj->sgt); dobj->sgt = NULL; diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c index 42abee9a0f4f..ee3333f346b7 100644 --- a/drivers/gpu/drm/drm_gem_cma_helper.c +++ b/drivers/gpu/drm/drm_gem_cma_helper.c @@ -232,7 +232,7 @@ void drm_gem_cma_free(struct drm_gem_cma_object *cma_obj)

if (gem_obj->import_attach) { if (cma_obj->vaddr) - dma_buf_vunmap(gem_obj->import_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(gem_obj->import_attach->dmabuf, &map); drm_prime_gem_destroy(gem_obj, cma_obj->sgt); } else if (cma_obj->vaddr) { if (cma_obj->map_noncoherent) @@ -581,7 +581,7 @@ drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *dev, struct iosys_map map; int ret;

- ret = dma_buf_vmap(attach->dmabuf, &map); + ret = dma_buf_vmap_unlocked(attach->dmabuf, &map); if (ret) { DRM_ERROR("Failed to vmap PRIME buffer\n"); return ERR_PTR(ret); @@ -589,7 +589,7 @@ drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *dev,

obj = drm_gem_cma_prime_import_sg_table(dev, attach, sgt); if (IS_ERR(obj)) { - dma_buf_vunmap(attach->dmabuf, &map); + dma_buf_vunmap_unlocked(attach->dmabuf, &map); return obj; }

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 8ad0e02991ca..c5e7a84ead06 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -299,7 +299,7 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, }

if (obj->import_attach) { - ret = dma_buf_vmap(obj->import_attach->dmabuf, map); + ret = dma_buf_vmap_unlocked(obj->import_attach->dmabuf, map); if (!ret) { if (WARN_ON(map->is_iomem)) { ret = -EIO; @@ -382,7 +382,7 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, return;

if (obj->import_attach) { - dma_buf_vunmap(obj->import_attach->dmabuf, map); + dma_buf_vunmap_unlocked(obj->import_attach->dmabuf, map); } else { vunmap(shmem->vaddr); drm_gem_shmem_put_pages(shmem); @@ -617,7 +617,7 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct drm_gem_object_put(obj); vma->vm_private_data = NULL;

- return dma_buf_mmap(obj->dma_buf, vma, 0); + return dma_buf_mmap_unlocked(obj->dma_buf, vma, 0); }

ret = drm_gem_shmem_get_pages(shmem); diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index a3f180653b8b..b75ef1756873 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -930,13 +930,13 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev, if (!dev->driver->gem_prime_import_sg_table) return ERR_PTR(-EINVAL);

- attach = dma_buf_attach(dma_buf, attach_dev); + attach = dma_buf_attach_unlocked(dma_buf, attach_dev); if (IS_ERR(attach)) return ERR_CAST(attach);

get_dma_buf(dma_buf);

- sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL); if (IS_ERR(sgt)) { ret = PTR_ERR(sgt); goto fail_detach; @@ -954,9 +954,9 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev, return obj;

fail_unmap: - dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_BIDIRECTIONAL); fail_detach: - dma_buf_detach(dma_buf, attach); + dma_buf_detach_unlocked(dma_buf, attach); dma_buf_put(dma_buf);

return ERR_PTR(ret); @@ -1052,9 +1052,9 @@ void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg)

attach = obj->import_attach; if (sg) - dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(attach, sg, DMA_BIDIRECTIONAL); dma_buf = attach->dmabuf; - dma_buf_detach(attach->dmabuf, attach); + dma_buf_detach_unlocked(attach->dmabuf, attach); /* remove the reference */ dma_buf_put(dma_buf); } diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c index 3fa2da149639..ae6c1eda0a72 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c @@ -65,7 +65,7 @@ static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj) struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr);

if (etnaviv_obj->vaddr) - dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(etnaviv_obj->base.import_attach->dmabuf, &map);

/* Don't drop the pages for imported dmabuf, as they are not * ours, just free the array we allocated: @@ -82,7 +82,7 @@ static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)

lockdep_assert_held(&etnaviv_obj->lock);

- ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map); + ret = dma_buf_vmap_unlocked(etnaviv_obj->base.import_attach->dmabuf, &map); if (ret) return NULL; return map.vaddr; @@ -91,7 +91,7 @@ static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj) static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, struct vm_area_struct *vma) { - return dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0); + return dma_buf_mmap_unlocked(etnaviv_obj->base.dma_buf, vma, 0); }

static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = { diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 3e493f48e0d4..8e95a3c5caf8 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -366,7 +366,7 @@ static int exynos_drm_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct int ret;

if (obj->import_attach) - return dma_buf_mmap(obj->dma_buf, vma, 0); + return dma_buf_mmap_unlocked(obj->dma_buf, vma, 0);

vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index f5062d0c6333..5ecea7df98b1 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -241,8 +241,8 @@ static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj)

assert_object_held(obj);

- pages = dma_buf_map_attachment(obj->base.import_attach, - DMA_BIDIRECTIONAL); + pages = dma_buf_map_attachment_unlocked(obj->base.import_attach, + DMA_BIDIRECTIONAL); if (IS_ERR(pages)) return PTR_ERR(pages);

@@ -270,8 +270,8 @@ static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj) static void i915_gem_object_put_pages_dmabuf(struct drm_i915_gem_object *obj, struct sg_table *pages) { - dma_buf_unmap_attachment(obj->base.import_attach, pages, - DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(obj->base.import_attach, pages, + DMA_BIDIRECTIONAL); }

static const struct drm_i915_gem_object_ops i915_gem_object_dmabuf_ops = { @@ -306,7 +306,7 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev, return ERR_PTR(-E2BIG);

/* need to attach */ - attach = dma_buf_attach(dma_buf, dev->dev); + attach = dma_buf_attach_unlocked(dma_buf, dev->dev); if (IS_ERR(attach)) return ERR_CAST(attach);

@@ -337,7 +337,7 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev, return &obj->base;

fail_detach: - dma_buf_detach(dma_buf, attach); + dma_buf_detach_unlocked(dma_buf, attach); dma_buf_put(dma_buf);

return ERR_PTR(ret); diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c index 62c61af77a42..6053af920a22 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c @@ -207,13 +207,13 @@ static int igt_dmabuf_import_same_driver(struct drm_i915_private *i915, i915_gem_object_unlock(import_obj);

/* Now try a fake an importer */ - import_attach = dma_buf_attach(dmabuf, obj->base.dev->dev); + import_attach = dma_buf_attach_unlocked(dmabuf, obj->base.dev->dev); if (IS_ERR(import_attach)) { err = PTR_ERR(import_attach); goto out_import; }

- st = dma_buf_map_attachment(import_attach, DMA_BIDIRECTIONAL); + st = dma_buf_map_attachment_unlocked(import_attach, DMA_BIDIRECTIONAL); if (IS_ERR(st)) { err = PTR_ERR(st); goto out_detach; @@ -226,9 +226,9 @@ static int igt_dmabuf_import_same_driver(struct drm_i915_private *i915, timeout = -ETIME; } err = timeout > 0 ? 0 : timeout; - dma_buf_unmap_attachment(import_attach, st, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(import_attach, st, DMA_BIDIRECTIONAL); out_detach: - dma_buf_detach(dmabuf, import_attach); + dma_buf_detach_unlocked(dmabuf, import_attach); out_import: i915_gem_object_put(import_obj); out_dmabuf: @@ -296,7 +296,7 @@ static int igt_dmabuf_import(void *arg) goto out_obj; }

- err = dma_buf_vmap(dmabuf, &map); + err = dma_buf_vmap_unlocked(dmabuf, &map); dma_map = err ? NULL : map.vaddr; if (!dma_map) { pr_err("dma_buf_vmap failed\n"); @@ -337,7 +337,7 @@ static int igt_dmabuf_import(void *arg)

err = 0; out_dma_map: - dma_buf_vunmap(dmabuf, &map); + dma_buf_vunmap_unlocked(dmabuf, &map); out_obj: i915_gem_object_put(obj); out_dmabuf: @@ -358,7 +358,7 @@ static int igt_dmabuf_import_ownership(void *arg) if (IS_ERR(dmabuf)) return PTR_ERR(dmabuf);

- err = dma_buf_vmap(dmabuf, &map); + err = dma_buf_vmap_unlocked(dmabuf, &map); ptr = err ? NULL : map.vaddr; if (!ptr) { pr_err("dma_buf_vmap failed\n"); @@ -367,7 +367,7 @@ static int igt_dmabuf_import_ownership(void *arg) }

memset(ptr, 0xc5, PAGE_SIZE); - dma_buf_vunmap(dmabuf, &map); + dma_buf_vunmap_unlocked(dmabuf, &map);

obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf)); if (IS_ERR(obj)) { @@ -418,7 +418,7 @@ static int igt_dmabuf_export_vmap(void *arg) } i915_gem_object_put(obj);

- err = dma_buf_vmap(dmabuf, &map); + err = dma_buf_vmap_unlocked(dmabuf, &map); ptr = err ? NULL : map.vaddr; if (!ptr) { pr_err("dma_buf_vmap failed\n"); @@ -435,7 +435,7 @@ static int igt_dmabuf_export_vmap(void *arg) memset(ptr, 0xc5, dmabuf->size);

err = 0; - dma_buf_vunmap(dmabuf, &map); + dma_buf_vunmap_unlocked(dmabuf, &map); out: dma_buf_put(dmabuf); return err; diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c index 393f82e26927..a725a91c2ff9 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c +++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c @@ -119,13 +119,13 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev, } }

- attach = dma_buf_attach(dma_buf, dev->dev); + attach = dma_buf_attach_unlocked(dma_buf, dev->dev); if (IS_ERR(attach)) return ERR_CAST(attach);

get_dma_buf(dma_buf);

- sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); + sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE); if (IS_ERR(sgt)) { ret = PTR_ERR(sgt); goto fail_detach; @@ -142,9 +142,9 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev, return obj;

fail_unmap: - dma_buf_unmap_attachment(attach, sgt, DMA_TO_DEVICE); + dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_TO_DEVICE); fail_detach: - dma_buf_detach(dma_buf, attach); + dma_buf_detach_unlocked(dma_buf, attach); dma_buf_put(dma_buf);

return ERR_PTR(ret); diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c index 81991090adcc..bbfe196ff6f6 100644 --- a/drivers/gpu/drm/tegra/gem.c +++ b/drivers/gpu/drm/tegra/gem.c @@ -78,15 +78,15 @@ static struct host1x_bo_mapping *tegra_bo_pin(struct device *dev, struct host1x_ if (gem->import_attach) { struct dma_buf *buf = gem->import_attach->dmabuf;

- map->attach = dma_buf_attach(buf, dev); + map->attach = dma_buf_attach_unlocked(buf, dev); if (IS_ERR(map->attach)) { err = PTR_ERR(map->attach); goto free; }

- map->sgt = dma_buf_map_attachment(map->attach, direction); + map->sgt = dma_buf_map_attachment_unlocked(map->attach, direction); if (IS_ERR(map->sgt)) { - dma_buf_detach(buf, map->attach); + dma_buf_detach_unlocked(buf, map->attach); err = PTR_ERR(map->sgt); map->sgt = NULL; goto free; @@ -160,8 +160,9 @@ static struct host1x_bo_mapping *tegra_bo_pin(struct device *dev, struct host1x_ static void tegra_bo_unpin(struct host1x_bo_mapping *map) { if (map->attach) { - dma_buf_unmap_attachment(map->attach, map->sgt, map->direction); - dma_buf_detach(map->attach->dmabuf, map->attach); + dma_buf_unmap_attachment_unlocked(map->attach, map->sgt, + map->direction); + dma_buf_detach_unlocked(map->attach->dmabuf, map->attach); } else { dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0); sg_free_table(map->sgt); @@ -181,7 +182,7 @@ static void *tegra_bo_mmap(struct host1x_bo *bo) if (obj->vaddr) { return obj->vaddr; } else if (obj->gem.import_attach) { - ret = dma_buf_vmap(obj->gem.import_attach->dmabuf, &map); + ret = dma_buf_vmap_unlocked(obj->gem.import_attach->dmabuf, &map); return ret ? NULL : map.vaddr; } else { return vmap(obj->pages, obj->num_pages, VM_MAP, @@ -197,7 +198,7 @@ static void tegra_bo_munmap(struct host1x_bo *bo, void *addr) if (obj->vaddr) return; else if (obj->gem.import_attach) - dma_buf_vunmap(obj->gem.import_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(obj->gem.import_attach->dmabuf, &map); else vunmap(addr); } @@ -453,7 +454,7 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm, if (IS_ERR(bo)) return bo;

- attach = dma_buf_attach(buf, drm->dev); + attach = dma_buf_attach_unlocked(buf, drm->dev); if (IS_ERR(attach)) { err = PTR_ERR(attach); goto free; @@ -461,7 +462,7 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm,

get_dma_buf(buf);

- bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); + bo->sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE); if (IS_ERR(bo->sgt)) { err = PTR_ERR(bo->sgt); goto detach; @@ -479,9 +480,9 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm,

detach: if (!IS_ERR_OR_NULL(bo->sgt)) - dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE); + dma_buf_unmap_attachment_unlocked(attach, bo->sgt, DMA_TO_DEVICE);

- dma_buf_detach(buf, attach); + dma_buf_detach_unlocked(buf, attach); dma_buf_put(buf); free: drm_gem_object_release(&bo->gem); @@ -508,8 +509,8 @@ void tegra_bo_free_object(struct drm_gem_object *gem) tegra_bo_iommu_unmap(tegra, bo);

if (gem->import_attach) { - dma_buf_unmap_attachment(gem->import_attach, bo->sgt, - DMA_TO_DEVICE); + dma_buf_unmap_attachment_unlocked(gem->import_attach, bo->sgt, + DMA_TO_DEVICE); drm_prime_gem_destroy(gem, NULL); } else { tegra_bo_free(gem->dev, bo); diff --git a/drivers/infiniband/core/umem_dmabuf.c b/drivers/infiniband/core/umem_dmabuf.c index fce80a4a5147..12b73e6ad054 100644 --- a/drivers/infiniband/core/umem_dmabuf.c +++ b/drivers/infiniband/core/umem_dmabuf.c @@ -25,7 +25,8 @@ int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf) if (umem_dmabuf->sgt) goto wait_fence;

- sgt = dma_buf_map_attachment(umem_dmabuf->attach, DMA_BIDIRECTIONAL); + sgt = dma_buf_map_attachment_unlocked(umem_dmabuf->attach, + DMA_BIDIRECTIONAL); if (IS_ERR(sgt)) return PTR_ERR(sgt);

@@ -96,8 +97,8 @@ void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf) umem_dmabuf->last_sg_trim = 0; }

- dma_buf_unmap_attachment(umem_dmabuf->attach, umem_dmabuf->sgt, - DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(umem_dmabuf->attach, umem_dmabuf->sgt, + DMA_BIDIRECTIONAL);

umem_dmabuf->sgt = NULL; } @@ -143,7 +144,7 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device, if (!ib_umem_num_pages(umem)) goto out_free_umem;

- umem_dmabuf->attach = dma_buf_dynamic_attach( + umem_dmabuf->attach = dma_buf_dynamic_attach_unlocked( dmabuf, device->dma_device, ops, @@ -222,7 +223,7 @@ void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf) dma_buf_unpin(umem_dmabuf->attach); dma_resv_unlock(dmabuf->resv);

- dma_buf_detach(dmabuf, umem_dmabuf->attach); + dma_buf_detach_unlocked(dmabuf, umem_dmabuf->attach); dma_buf_put(dmabuf); kfree(umem_dmabuf); } diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index 678b359717c4..de762dbdaf78 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -101,7 +101,7 @@ static void *vb2_dc_vaddr(struct vb2_buffer *vb, void *buf_priv) if (buf->db_attach) { struct iosys_map map;

- if (!dma_buf_vmap(buf->db_attach->dmabuf, &map)) + if (!dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map)) buf->vaddr = map.vaddr;

return buf->vaddr; @@ -711,7 +711,7 @@ static int vb2_dc_map_dmabuf(void *mem_priv) }

/* get the associated scatterlist for this buffer */ - sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir); + sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir); if (IS_ERR(sgt)) { pr_err("Error getting dmabuf scatterlist\n"); return -EINVAL; @@ -722,7 +722,8 @@ static int vb2_dc_map_dmabuf(void *mem_priv) if (contig_size < buf->size) { pr_err("contiguous chunk is too small %lu/%lu\n", contig_size, buf->size); - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir); + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, + buf->dma_dir); return -EFAULT; }

@@ -750,10 +751,10 @@ static void vb2_dc_unmap_dmabuf(void *mem_priv) }

if (buf->vaddr) { - dma_buf_vunmap(buf->db_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map); buf->vaddr = NULL; } - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir); + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);

buf->dma_addr = 0; buf->dma_sgt = NULL; @@ -768,7 +769,7 @@ static void vb2_dc_detach_dmabuf(void *mem_priv) vb2_dc_unmap_dmabuf(buf);

/* detach this attachment */ - dma_buf_detach(buf->db_attach->dmabuf, buf->db_attach); + dma_buf_detach_unlocked(buf->db_attach->dmabuf, buf->db_attach); kfree(buf); }

@@ -792,7 +793,7 @@ static void *vb2_dc_attach_dmabuf(struct vb2_buffer *vb, struct device *dev, buf->vb = vb;

/* create attachment for the dmabuf with the user device */ - dba = dma_buf_attach(dbuf, buf->dev); + dba = dma_buf_attach_unlocked(dbuf, buf->dev); if (IS_ERR(dba)) { pr_err("failed to attach dmabuf\n"); kfree(buf); diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index fa69158a65b1..39e11600304a 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -309,7 +309,7 @@ static void *vb2_dma_sg_vaddr(struct vb2_buffer *vb, void *buf_priv)

if (!buf->vaddr) { if (buf->db_attach) { - ret = dma_buf_vmap(buf->db_attach->dmabuf, &map); + ret = dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map); buf->vaddr = ret ? NULL : map.vaddr; } else { buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1); @@ -565,7 +565,7 @@ static int vb2_dma_sg_map_dmabuf(void *mem_priv) }

/* get the associated scatterlist for this buffer */ - sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir); + sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir); if (IS_ERR(sgt)) { pr_err("Error getting dmabuf scatterlist\n"); return -EINVAL; @@ -594,10 +594,10 @@ static void vb2_dma_sg_unmap_dmabuf(void *mem_priv) }

if (buf->vaddr) { - dma_buf_vunmap(buf->db_attach->dmabuf, &map); + dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map); buf->vaddr = NULL; } - dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir); + dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);

buf->dma_sgt = NULL; } @@ -611,7 +611,7 @@ static void vb2_dma_sg_detach_dmabuf(void *mem_priv) vb2_dma_sg_unmap_dmabuf(buf);

/* detach this attachment */ - dma_buf_detach(buf->db_attach->dmabuf, buf->db_attach); + dma_buf_detach_unlocked(buf->db_attach->dmabuf, buf->db_attach); kfree(buf); }

@@ -633,7 +633,7 @@ static void *vb2_dma_sg_attach_dmabuf(struct vb2_buffer *vb, struct device *dev,

buf->dev = dev; /* create attachment for the dmabuf with the user device */ - dba = dma_buf_attach(dbuf, buf->dev); + dba = dma_buf_attach_unlocked(dbuf, buf->dev); if (IS_ERR(dba)) { pr_err("failed to attach dmabuf\n"); kfree(buf); diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c index 948152f1596b..7831bf545874 100644 --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -376,7 +376,7 @@ static int vb2_vmalloc_map_dmabuf(void *mem_priv) struct iosys_map map; int ret;

- ret = dma_buf_vmap(buf->dbuf, &map); + ret = dma_buf_vmap_unlocked(buf->dbuf, &map); if (ret) return -EFAULT; buf->vaddr = map.vaddr; @@ -389,7 +389,7 @@ static void vb2_vmalloc_unmap_dmabuf(void *mem_priv) struct vb2_vmalloc_buf *buf = mem_priv; struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);

- dma_buf_vunmap(buf->dbuf, &map); + dma_buf_vunmap_unlocked(buf->dbuf, &map); buf->vaddr = NULL; }

@@ -399,7 +399,7 @@ static void vb2_vmalloc_detach_dmabuf(void *mem_priv) struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);

if (buf->vaddr) - dma_buf_vunmap(buf->dbuf, &map); + dma_buf_vunmap_unlocked(buf->dbuf, &map);

kfree(buf); } diff --git a/drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c b/drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c index 69c346148070..58e4595f3a10 100644 --- a/drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c +++ b/drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c @@ -38,8 +38,8 @@ static void tegra_vde_release_entry(struct tegra_vde_cache_entry *entry) if (entry->vde->domain) tegra_vde_iommu_unmap(entry->vde, entry->iova);

- dma_buf_unmap_attachment(entry->a, entry->sgt, entry->dma_dir); - dma_buf_detach(dmabuf, entry->a); + dma_buf_unmap_attachment_unlocked(entry->a, entry->sgt, entry->dma_dir); + dma_buf_detach_unlocked(dmabuf, entry->a); dma_buf_put(dmabuf);

list_del(&entry->list); @@ -95,14 +95,14 @@ int tegra_vde_dmabuf_cache_map(struct tegra_vde *vde, goto ref; }

- attachment = dma_buf_attach(dmabuf, dev); + attachment = dma_buf_attach_unlocked(dmabuf, dev); if (IS_ERR(attachment)) { dev_err(dev, "Failed to attach dmabuf\n"); err = PTR_ERR(attachment); goto err_unlock; }

- sgt = dma_buf_map_attachment(attachment, dma_dir); + sgt = dma_buf_map_attachment_unlocked(attachment, dma_dir); if (IS_ERR(sgt)) { dev_err(dev, "Failed to get dmabufs sg_table\n"); err = PTR_ERR(sgt); @@ -152,9 +152,9 @@ int tegra_vde_dmabuf_cache_map(struct tegra_vde *vde, err_free: kfree(entry); err_unmap: - dma_buf_unmap_attachment(attachment, sgt, dma_dir); + dma_buf_unmap_attachment_unlocked(attachment, sgt, dma_dir); err_detach: - dma_buf_detach(dmabuf, attachment); + dma_buf_detach_unlocked(dmabuf, attachment); err_unlock: mutex_unlock(&vde->map_lock);

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 93ebd174d848..558e8056eb80 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -310,9 +310,9 @@ static void fastrpc_free_map(struct kref *ref) return; } } - dma_buf_unmap_attachment(map->attach, map->table, - DMA_BIDIRECTIONAL); - dma_buf_detach(map->buf, map->attach); + dma_buf_unmap_attachment_unlocked(map->attach, map->table, + DMA_BIDIRECTIONAL); + dma_buf_detach_unlocked(map->buf, map->attach); dma_buf_put(map->buf); }

@@ -719,14 +719,14 @@ static int fastrpc_map_create(struct fastrpc_user *fl, int fd, goto get_err; }

- map->attach = dma_buf_attach(map->buf, sess->dev); + map->attach = dma_buf_attach_unlocked(map->buf, sess->dev); if (IS_ERR(map->attach)) { dev_err(sess->dev, "Failed to attach dmabuf\n"); err = PTR_ERR(map->attach); goto attach_err; }

- map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); + map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL); if (IS_ERR(map->table)) { err = PTR_ERR(map->table); goto map_err; @@ -763,7 +763,7 @@ static int fastrpc_map_create(struct fastrpc_user *fl, int fd, return 0;

map_err: - dma_buf_detach(map->buf, map->attach); + dma_buf_detach_unlocked(map->buf, map->attach); attach_err: dma_buf_put(map->buf); get_err: diff --git a/drivers/xen/gntdev-dmabuf.c b/drivers/xen/gntdev-dmabuf.c index 940e5e9e8a54..5a50e2697e95 100644 --- a/drivers/xen/gntdev-dmabuf.c +++ b/drivers/xen/gntdev-dmabuf.c @@ -592,7 +592,7 @@ dmabuf_imp_to_refs(struct gntdev_dmabuf_priv *priv, struct device *dev, gntdev_dmabuf->priv = priv; gntdev_dmabuf->fd = fd;

- attach = dma_buf_attach(dma_buf, dev); + attach = dma_buf_attach_unlocked(dma_buf, dev); if (IS_ERR(attach)) { ret = ERR_CAST(attach); goto fail_free_obj; @@ -600,7 +600,7 @@ dmabuf_imp_to_refs(struct gntdev_dmabuf_priv *priv, struct device *dev,

gntdev_dmabuf->u.imp.attach = attach;

- sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL); if (IS_ERR(sgt)) { ret = ERR_CAST(sgt); goto fail_detach; @@ -658,9 +658,9 @@ dmabuf_imp_to_refs(struct gntdev_dmabuf_priv *priv, struct device *dev, fail_end_access: dmabuf_imp_end_foreign_access(gntdev_dmabuf->u.imp.refs, count); fail_unmap: - dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_BIDIRECTIONAL); fail_detach: - dma_buf_detach(dma_buf, attach); + dma_buf_detach_unlocked(dma_buf, attach); fail_free_obj: dmabuf_imp_free_storage(gntdev_dmabuf); fail_put: @@ -708,10 +708,10 @@ static int dmabuf_imp_release(struct gntdev_dmabuf_priv *priv, u32 fd) attach = gntdev_dmabuf->u.imp.attach;

if (gntdev_dmabuf->u.imp.sgt) - dma_buf_unmap_attachment(attach, gntdev_dmabuf->u.imp.sgt, - DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_unlocked(attach, gntdev_dmabuf->u.imp.sgt, + DMA_BIDIRECTIONAL); dma_buf = attach->dmabuf; - dma_buf_detach(attach->dmabuf, attach); + dma_buf_detach_unlocked(attach->dmabuf, attach); dma_buf_put(dma_buf);

dmabuf_imp_free_storage(gntdev_dmabuf); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 71731796c8c3..9ab09569dec1 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -601,14 +601,16 @@ dma_buf_attachment_is_dynamic(struct dma_buf_attachment *attach) return !!attach->importer_ops; }

-struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, - struct device *dev); +struct dma_buf_attachment *dma_buf_attach_unlocked(struct dma_buf *dmabuf, + struct device *dev); struct dma_buf_attachment * -dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, - const struct dma_buf_attach_ops *importer_ops, - void *importer_priv); -void dma_buf_detach(struct dma_buf *dmabuf, - struct dma_buf_attachment *attach); +dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, + const struct dma_buf_attach_ops *importer_ops, + void *importer_priv); + +void dma_buf_detach_unlocked(struct dma_buf *dmabuf, + struct dma_buf_attachment *attach); + int dma_buf_pin(struct dma_buf_attachment *attach); void dma_buf_unpin(struct dma_buf_attachment *attach);

@@ -618,18 +620,20 @@ int dma_buf_fd(struct dma_buf *dmabuf, int flags); struct dma_buf *dma_buf_get(int fd); void dma_buf_put(struct dma_buf *dmabuf);

-struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *, - enum dma_data_direction); -void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *, - enum dma_data_direction); +struct sg_table *dma_buf_map_attachment_unlocked(struct dma_buf_attachment *, + enum dma_data_direction); +void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *, + struct sg_table *, + enum dma_data_direction); + void dma_buf_move_notify(struct dma_buf *dma_buf); int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir); int dma_buf_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir);

-int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, - unsigned long); -int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map); -void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map); +int dma_buf_mmap_unlocked(struct dma_buf *, struct vm_area_struct *, + unsigned long); +int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map); +void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map); #endif /* __DMA_BUF_H__ */

The new common dma-buf locking convention will require buffer importers to hold the reservation lock around mapping operations. Make DRM GEM core to take the lock around the vmapping operations and update QXL and i915 drivers to use the locked functions for the case where DRM core now holds the lock. This patch prepares DRM core and drivers to transition to the common dma-buf locking convention where vmapping of exported GEMs will be done under the held reservation lock.

Signed-off-by: Dmitry Osipenko dmitry.osipenko@collabora.com --- drivers/gpu/drm/drm_client.c | 4 +-- drivers/gpu/drm/drm_gem.c | 28 ++++++++++++++++++++ drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 ++--- drivers/gpu/drm/drm_prime.c | 4 +-- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 2 +- drivers/gpu/drm/qxl/qxl_object.c | 17 ++++++------ drivers/gpu/drm/qxl/qxl_prime.c | 4 +-- include/drm/drm_gem.h | 3 +++ 8 files changed, 50 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index 2b230b4d6942..fbcb1e995384 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -323,7 +323,7 @@ drm_client_buffer_vmap(struct drm_client_buffer *buffer, * fd_install step out of the driver backend hooks, to make that * final step optional for internal users. */ - ret = drm_gem_vmap(buffer->gem, map); + ret = drm_gem_vmap_unlocked(buffer->gem, map); if (ret) return ret;

@@ -345,7 +345,7 @@ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { struct iosys_map *map = &buffer->map;

- drm_gem_vunmap(buffer->gem, map); + drm_gem_vunmap_unlocked(buffer->gem, map); } EXPORT_SYMBOL(drm_client_buffer_vunmap);

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index eb0c2d041f13..9769c33cad99 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1155,6 +1155,8 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,

int drm_gem_pin(struct drm_gem_object *obj) { + dma_resv_assert_held(obj->resv); + if (obj->funcs->pin) return obj->funcs->pin(obj); else @@ -1163,6 +1165,8 @@ int drm_gem_pin(struct drm_gem_object *obj)

void drm_gem_unpin(struct drm_gem_object *obj) { + dma_resv_assert_held(obj->resv); + if (obj->funcs->unpin) obj->funcs->unpin(obj); } @@ -1171,6 +1175,8 @@ int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) { int ret;

+ dma_resv_assert_held(obj->resv); + if (!obj->funcs->vmap) return -EOPNOTSUPP;

@@ -1186,6 +1192,8 @@ EXPORT_SYMBOL(drm_gem_vmap);

void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) { + dma_resv_assert_held(obj->resv); + if (iosys_map_is_null(map)) return;

@@ -1197,6 +1205,26 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map) } EXPORT_SYMBOL(drm_gem_vunmap);

+int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +{ + int ret; + + dma_resv_lock(obj->resv, NULL); + ret = drm_gem_vmap(obj, map); + dma_resv_unlock(obj->resv); + + return ret; +} +EXPORT_SYMBOL(drm_gem_vmap_unlocked); + +void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map) +{ + dma_resv_lock(obj->resv, NULL); + drm_gem_vunmap(obj, map); + dma_resv_unlock(obj->resv); +} +EXPORT_SYMBOL(drm_gem_vunmap_unlocked); + /** * drm_gem_lock_reservations - Sets up the ww context and acquires * the lock on an array of GEM objects. diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 880a4975507f..e35e224e6303 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -354,7 +354,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct iosys_map *map, ret = -EINVAL; goto err_drm_gem_vunmap; } - ret = drm_gem_vmap(obj, &map[i]); + ret = drm_gem_vmap_unlocked(obj, &map[i]); if (ret) goto err_drm_gem_vunmap; } @@ -376,7 +376,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct iosys_map *map, obj = drm_gem_fb_get_obj(fb, i); if (!obj) continue; - drm_gem_vunmap(obj, &map[i]); + drm_gem_vunmap_unlocked(obj, &map[i]); } return ret; } @@ -403,7 +403,7 @@ void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct iosys_map *map) continue; if (iosys_map_is_null(&map[i])) continue; - drm_gem_vunmap(obj, &map[i]); + drm_gem_vunmap_unlocked(obj, &map[i]); } } EXPORT_SYMBOL(drm_gem_fb_vunmap); diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index b75ef1756873..1bd234fd21a5 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -678,7 +678,7 @@ int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv;

- return drm_gem_vmap(obj, map); + return drm_gem_vmap_unlocked(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vmap);

@@ -694,7 +694,7 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv;

- drm_gem_vunmap(obj, map); + drm_gem_vunmap_unlocked(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index 5ecea7df98b1..cc54a5b1d6ae 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -72,7 +72,7 @@ static int i915_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); void *vaddr;

- vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB); + vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB); if (IS_ERR(vaddr)) return PTR_ERR(vaddr);

diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 695d9308d1f0..06a58dad5f5c 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -168,9 +168,16 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map) bo->map_count++; goto out; } - r = ttm_bo_vmap(&bo->tbo, &bo->map); + + r = __qxl_bo_pin(bo); if (r) return r; + + r = ttm_bo_vmap(&bo->tbo, &bo->map); + if (r) { + __qxl_bo_unpin(bo); + return r; + } bo->map_count = 1;

/* TODO: Remove kptr in favor of map everywhere. */ @@ -192,12 +199,6 @@ int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map) if (r) return r;

- r = __qxl_bo_pin(bo); - if (r) { - qxl_bo_unreserve(bo); - return r; - } - r = qxl_bo_vmap_locked(bo, map); qxl_bo_unreserve(bo); return r; @@ -247,6 +248,7 @@ void qxl_bo_vunmap_locked(struct qxl_bo *bo) return; bo->kptr = NULL; ttm_bo_vunmap(&bo->tbo, &bo->map); + __qxl_bo_unpin(bo); }

int qxl_bo_vunmap(struct qxl_bo *bo) @@ -258,7 +260,6 @@ int qxl_bo_vunmap(struct qxl_bo *bo) return r;

qxl_bo_vunmap_locked(bo); - __qxl_bo_unpin(bo); qxl_bo_unreserve(bo); return 0; } diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c index 142d01415acb..9169c26357d3 100644 --- a/drivers/gpu/drm/qxl/qxl_prime.c +++ b/drivers/gpu/drm/qxl/qxl_prime.c @@ -59,7 +59,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) struct qxl_bo *bo = gem_to_qxl_bo(obj); int ret;

- ret = qxl_bo_vmap(bo, map); + ret = qxl_bo_vmap_locked(bo, map); if (ret < 0) return ret;

@@ -71,5 +71,5 @@ void qxl_gem_prime_vunmap(struct drm_gem_object *obj, { struct qxl_bo *bo = gem_to_qxl_bo(obj);

- qxl_bo_vunmap(bo); + qxl_bo_vunmap_locked(bo); } diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 87cffc9efa85..bf3700415229 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -420,4 +420,7 @@ void drm_gem_unlock_reservations(struct drm_gem_object **objs, int count, int drm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, u32 handle, u64 *offset);

+int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map); +void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map); + #endif /* __DRM_GEM_H__ */

This patch moves the non-dynamic dma-buf users over to the dynamic locking specification. From now on all dma-buf importers are responsible for holding dma-buf's reservation lock around operations performed over dma-bufs. This strict locking convention prevents dead lock situation for dma-buf importers and exporters.

Previously the "unlocked" versions of the dma-buf API functions weren't taking the reservation lock and this patch makes them to take the lock.

Intel and AMD GPU drivers already were mapping imported dma-bufs under the held lock, hence the "locked" variant of the functions are added for them and the drivers are updated to use the "locked" versions.

Intel driver is also updated to not lock the exported buffer on attachment since lock is now held by importer. We also need to move the ww context acquirement from exporters (i915 driver) to importers, otherwise lockdep won't be happy. This will be done in the next patch since i915 is the only driver that uses ww context on attachment today and it's not critical to make this change separately for i915 driver.

Signed-off-by: Dmitry Osipenko dmitry.osipenko@collabora.com --- drivers/dma-buf/dma-buf.c | 125 +++++++++++++++------ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 +- drivers/gpu/drm/drm_prime.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 12 +- include/linux/dma-buf.h | 6 + 5 files changed, 104 insertions(+), 47 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index d16237a6ffaa..0ee588276534 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -841,14 +841,14 @@ dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, attach->importer_ops = importer_ops; attach->importer_priv = importer_priv;

+ dma_resv_lock(dmabuf->resv, NULL); + if (dmabuf->ops->attach) { ret = dmabuf->ops->attach(dmabuf, attach); if (ret) goto err_attach; } - dma_resv_lock(dmabuf->resv, NULL); list_add(&attach->node, &dmabuf->attachments); - dma_resv_unlock(dmabuf->resv);

/* When either the importer or the exporter can't handle dynamic * mappings we cache the mapping here to avoid issues with the @@ -859,7 +859,6 @@ dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, struct sg_table *sgt;

if (dma_buf_is_dynamic(attach->dmabuf)) { - dma_resv_lock(attach->dmabuf->resv, NULL); ret = dmabuf->ops->pin(attach); if (ret) goto err_unlock; @@ -872,15 +871,16 @@ dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, ret = PTR_ERR(sgt); goto err_unpin; } - if (dma_buf_is_dynamic(attach->dmabuf)) - dma_resv_unlock(attach->dmabuf->resv); attach->sgt = sgt; attach->dir = DMA_BIDIRECTIONAL; }

+ dma_resv_unlock(dmabuf->resv); + return attach;

err_attach: + dma_resv_unlock(attach->dmabuf->resv); kfree(attach); return ERR_PTR(ret);

@@ -889,8 +889,7 @@ dma_buf_dynamic_attach_unlocked(struct dma_buf *dmabuf, struct device *dev, dmabuf->ops->unpin(attach);

err_unlock: - if (dma_buf_is_dynamic(attach->dmabuf)) - dma_resv_unlock(attach->dmabuf->resv); + dma_resv_unlock(dmabuf->resv);

dma_buf_detach_unlocked(dmabuf, attach); return ERR_PTR(ret); @@ -937,24 +936,23 @@ void dma_buf_detach_unlocked(struct dma_buf *dmabuf, if (WARN_ON(!dmabuf || !attach)) return;

- if (attach->sgt) { - if (dma_buf_is_dynamic(attach->dmabuf)) - dma_resv_lock(attach->dmabuf->resv, NULL); + if (WARN_ON(dmabuf != attach->dmabuf)) + return;

+ dma_resv_lock(dmabuf->resv, NULL); + + if (attach->sgt) { __unmap_dma_buf(attach, attach->sgt, attach->dir);

- if (dma_buf_is_dynamic(attach->dmabuf)) { + if (dma_buf_is_dynamic(attach->dmabuf)) dmabuf->ops->unpin(attach); - dma_resv_unlock(attach->dmabuf->resv); - } } - - dma_resv_lock(dmabuf->resv, NULL); list_del(&attach->node); - dma_resv_unlock(dmabuf->resv); + if (dmabuf->ops->detach) dmabuf->ops->detach(dmabuf, attach);

+ dma_resv_unlock(dmabuf->resv); kfree(attach); } EXPORT_SYMBOL_NS_GPL(dma_buf_detach_unlocked, DMA_BUF); @@ -1030,10 +1028,11 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_unpin, DMA_BUF); * * Important: Dynamic importers must wait for the exclusive fence of the struct * dma_resv attached to the DMA-BUF first. + * + * Importer is responsible for holding dmabuf's reservation lock. */ -struct sg_table * -dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, - enum dma_data_direction direction) +struct sg_table *dma_buf_map_attachment_locked(struct dma_buf_attachment *attach, + enum dma_data_direction direction) { struct sg_table *sg_table; int r; @@ -1043,8 +1042,7 @@ dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, if (WARN_ON(!attach || !attach->dmabuf)) return ERR_PTR(-EINVAL);

- if (dma_buf_attachment_is_dynamic(attach)) - dma_resv_assert_held(attach->dmabuf->resv); + dma_resv_assert_held(attach->dmabuf->resv);

if (attach->sgt) { /* @@ -1059,7 +1057,6 @@ dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, }

if (dma_buf_is_dynamic(attach->dmabuf)) { - dma_resv_assert_held(attach->dmabuf->resv); if (!IS_ENABLED(CONFIG_DMABUF_MOVE_NOTIFY)) { r = attach->dmabuf->ops->pin(attach); if (r) @@ -1099,10 +1096,38 @@ dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, #endif /* CONFIG_DMA_API_DEBUG */ return sg_table; } +EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment_locked, DMA_BUF); + +/** + * dma_buf_map_attachment_unlocked - Returns the scatterlist table of the attachment; + * mapped into _device_ address space. Is a wrapper for map_dma_buf() of the + * dma_buf_ops. + * @attach: [in] attachment whose scatterlist is to be returned + * @direction: [in] direction of DMA transfer + * + * Unlocked variant of dma_buf_map_attachment(). + */ +struct sg_table * +dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach, + enum dma_data_direction direction) +{ + struct sg_table *sg_table; + + might_sleep(); + + if (WARN_ON(!attach || !attach->dmabuf)) + return ERR_PTR(-EINVAL); + + dma_resv_lock(attach->dmabuf->resv, NULL); + sg_table = dma_buf_map_attachment_locked(attach, direction); + dma_resv_unlock(attach->dmabuf->resv); + + return sg_table; +} EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment_unlocked, DMA_BUF);

/** - * dma_buf_unmap_attachment_unlocked - unmaps and decreases usecount of the buffer;might + * dma_buf_unmap_attachment_locked - unmaps and decreases usecount of the buffer;might * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of * dma_buf_ops. * @attach: [in] attachment to unmap buffer from @@ -1110,31 +1135,51 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment_unlocked, DMA_BUF); * @direction: [in] direction of DMA transfer * * This unmaps a DMA mapping for @attached obtained by dma_buf_map_attachment(). + * + * Importer is responsible for holding dmabuf's reservation lock. */ -void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach, - struct sg_table *sg_table, - enum dma_data_direction direction) +void dma_buf_unmap_attachment_locked(struct dma_buf_attachment *attach, + struct sg_table *sg_table, + enum dma_data_direction direction) { might_sleep();

- if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) - return; - - if (dma_buf_attachment_is_dynamic(attach)) - dma_resv_assert_held(attach->dmabuf->resv); + dma_resv_assert_held(attach->dmabuf->resv);

if (attach->sgt == sg_table) return;

- if (dma_buf_is_dynamic(attach->dmabuf)) - dma_resv_assert_held(attach->dmabuf->resv); - __unmap_dma_buf(attach, sg_table, direction);

if (dma_buf_is_dynamic(attach->dmabuf) && !IS_ENABLED(CONFIG_DMABUF_MOVE_NOTIFY)) dma_buf_unpin(attach); } +EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment_locked, DMA_BUF); + +/** + * dma_buf_unmap_attachment_unlocked - unmaps and decreases usecount of the buffer;might + * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of + * dma_buf_ops. + * @attach: [in] attachment to unmap buffer from + * @sg_table: [in] scatterlist info of the buffer to unmap + * @direction: [in] direction of DMA transfer + * + * Unlocked variant of dma_buf_unmap_attachment(). + */ +void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach, + struct sg_table *sg_table, + enum dma_data_direction direction) +{ + might_sleep(); + + if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) + return; + + dma_resv_lock(attach->dmabuf->resv, NULL); + dma_buf_unmap_attachment_locked(attach, sg_table, direction); + dma_resv_unlock(attach->dmabuf->resv); +} EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment_unlocked, DMA_BUF);

/** @@ -1348,6 +1393,8 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_end_cpu_access, DMA_BUF); int dma_buf_mmap_unlocked(struct dma_buf *dmabuf, struct vm_area_struct *vma, unsigned long pgoff) { + int ret; + if (WARN_ON(!dmabuf || !vma)) return -EINVAL;

@@ -1368,7 +1415,11 @@ int dma_buf_mmap_unlocked(struct dma_buf *dmabuf, struct vm_area_struct *vma, vma_set_file(vma, dmabuf->file); vma->vm_pgoff = pgoff;

- return dmabuf->ops->mmap(dmabuf, vma); + dma_resv_lock(dmabuf->resv, NULL); + ret = dmabuf->ops->mmap(dmabuf, vma); + dma_resv_unlock(dmabuf->resv); + + return ret; } EXPORT_SYMBOL_NS_GPL(dma_buf_mmap_unlocked, DMA_BUF);

@@ -1401,6 +1452,7 @@ int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) if (!dmabuf->ops->vmap) return -EINVAL;

+ dma_resv_lock(dmabuf->resv, NULL); mutex_lock(&dmabuf->lock); if (dmabuf->vmapping_counter) { dmabuf->vmapping_counter++; @@ -1422,6 +1474,7 @@ int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map)

out_unlock: mutex_unlock(&dmabuf->lock); + dma_resv_unlock(dmabuf->resv); return ret; } EXPORT_SYMBOL_NS_GPL(dma_buf_vmap_unlocked, DMA_BUF); @@ -1440,6 +1493,7 @@ void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) BUG_ON(dmabuf->vmapping_counter == 0); BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map));

+ dma_resv_lock(dmabuf->resv, NULL); mutex_lock(&dmabuf->lock); if (--dmabuf->vmapping_counter == 0) { if (dmabuf->ops->vunmap) @@ -1447,6 +1501,7 @@ void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) iosys_map_clear(&dmabuf->vmap_ptr); } mutex_unlock(&dmabuf->lock); + dma_resv_unlock(dmabuf->resv); } EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap_unlocked, DMA_BUF);

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index e354ad140a0a..0d8b82e5b22f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -883,7 +883,7 @@ static int amdgpu_ttm_backend_bind(struct ttm_device *bdev, struct sg_table *sgt;

attach = gtt->gobj->import_attach; - sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL); + sgt = dma_buf_map_attachment_locked(attach, DMA_BIDIRECTIONAL); if (IS_ERR(sgt)) return PTR_ERR(sgt);

@@ -1008,7 +1008,7 @@ static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev, struct dma_buf_attachment *attach;

attach = gtt->gobj->import_attach; - dma_buf_unmap_attachment_unlocked(attach, ttm->sg, DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_locked(attach, ttm->sg, DMA_BIDIRECTIONAL); ttm->sg = NULL; }

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 1bd234fd21a5..b75ef1756873 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -678,7 +678,7 @@ int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv;

- return drm_gem_vmap_unlocked(obj, map); + return drm_gem_vmap(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vmap);

@@ -694,7 +694,7 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv;

- drm_gem_vunmap_unlocked(obj, map); + drm_gem_vunmap(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c index cc54a5b1d6ae..c199bf71c373 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c @@ -174,10 +174,6 @@ static int i915_gem_dmabuf_attach(struct dma_buf *dmabuf, return -EOPNOTSUPP;

for_i915_gem_ww(&ww, err, true) { - err = i915_gem_object_lock(obj, &ww); - if (err) - continue; - err = i915_gem_object_migrate(obj, &ww, INTEL_REGION_SMEM); if (err) continue; @@ -241,8 +237,8 @@ static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj)

assert_object_held(obj);

- pages = dma_buf_map_attachment_unlocked(obj->base.import_attach, - DMA_BIDIRECTIONAL); + pages = dma_buf_map_attachment_locked(obj->base.import_attach, + DMA_BIDIRECTIONAL); if (IS_ERR(pages)) return PTR_ERR(pages);

@@ -270,8 +266,8 @@ static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj) static void i915_gem_object_put_pages_dmabuf(struct drm_i915_gem_object *obj, struct sg_table *pages) { - dma_buf_unmap_attachment_unlocked(obj->base.import_attach, pages, - DMA_BIDIRECTIONAL); + dma_buf_unmap_attachment_locked(obj->base.import_attach, pages, + DMA_BIDIRECTIONAL); }

static const struct drm_i915_gem_object_ops i915_gem_object_dmabuf_ops = { diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 9ab09569dec1..da924a56d58f 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -626,6 +626,12 @@ void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *, struct sg_table *, enum dma_data_direction);

+struct sg_table *dma_buf_map_attachment_locked(struct dma_buf_attachment *, + enum dma_data_direction); +void dma_buf_unmap_attachment_locked(struct dma_buf_attachment *attach, + struct sg_table *sg_table, + enum dma_data_direction direction); + void dma_buf_move_notify(struct dma_buf *dma_buf); int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir);

The internal dma-buf lock isn't needed anymore because the updated locking specification claims that dma-buf reservation must be locked by importers, and thus, the internal data is already protected by the reservation lock. Remove the obsoleted internal lock.

Signed-off-by: Dmitry Osipenko dmitry.osipenko@collabora.com --- drivers/dma-buf/dma-buf.c | 5 ----- include/linux/dma-buf.h | 9 --------- 2 files changed, 14 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 37545ecb845a..4cc739537ebd 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -656,7 +656,6 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info)

dmabuf->file = file;

- mutex_init(&dmabuf->lock); INIT_LIST_HEAD(&dmabuf->attachments);

mutex_lock(&db_list.lock); @@ -1459,7 +1458,6 @@ int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) return -EINVAL;

dma_resv_lock(dmabuf->resv, NULL); - mutex_lock(&dmabuf->lock); if (dmabuf->vmapping_counter) { dmabuf->vmapping_counter++; BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr)); @@ -1479,7 +1477,6 @@ int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) *map = dmabuf->vmap_ptr;

out_unlock: - mutex_unlock(&dmabuf->lock); dma_resv_unlock(dmabuf->resv); return ret; } @@ -1500,13 +1497,11 @@ void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map));

dma_resv_lock(dmabuf->resv, NULL); - mutex_lock(&dmabuf->lock); if (--dmabuf->vmapping_counter == 0) { if (dmabuf->ops->vunmap) dmabuf->ops->vunmap(dmabuf, map); iosys_map_clear(&dmabuf->vmap_ptr); } - mutex_unlock(&dmabuf->lock); dma_resv_unlock(dmabuf->resv); } EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap_unlocked, DMA_BUF); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index da924a56d58f..abdd99042c77 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -326,15 +326,6 @@ struct dma_buf { /** @ops: dma_buf_ops associated with this buffer object. */ const struct dma_buf_ops *ops;

- /** - * @lock: - * - * Used internally to serialize list manipulation, attach/detach and - * vmap/unmap. Note that in many cases this is superseeded by - * dma_resv_lock() on @resv. - */ - struct mutex lock; - /** * @vmapping_counter: *