summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/gpu/drm/drm_gem.c83
-rw-r--r--drivers/gpu/drm/drm_gem_cma_helper.c404
-rw-r--r--drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c32
-rw-r--r--include/drm/drmP.h2
-rw-r--r--include/drm/drm_gem_cma_helper.h9
5 files changed, 434 insertions, 96 deletions
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index cf919e36e8a..43217138816 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -644,6 +644,55 @@ void drm_gem_vm_close(struct vm_area_struct *vma)
}
EXPORT_SYMBOL(drm_gem_vm_close);
+/**
+ * drm_gem_mmap_obj - memory map a GEM object
+ * @obj: the GEM object to map
+ * @obj_size: the object size to be mapped, in bytes
+ * @vma: VMA for the area to be mapped
+ *
+ * Set up the VMA to prepare mapping of the GEM object using the gem_vm_ops
+ * provided by the driver. Depending on their requirements, drivers can either
+ * provide a fault handler in their gem_vm_ops (in which case any accesses to
+ * the object will be trapped, to perform migration, GTT binding, surface
+ * register allocation, or performance monitoring), or mmap the buffer memory
+ * synchronously after calling drm_gem_mmap_obj.
+ *
+ * This function is mainly intended to implement the DMABUF mmap operation, when
+ * the GEM object is not looked up based on its fake offset. To implement the
+ * DRM mmap operation, drivers should use the drm_gem_mmap() function.
+ *
+ * Return 0 or success or -EINVAL if the object size is smaller than the VMA
+ * size, or if no gem_vm_ops are provided.
+ */
+int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
+ struct vm_area_struct *vma)
+{
+ struct drm_device *dev = obj->dev;
+
+ /* Check for valid size. */
+ if (obj_size < vma->vm_end - vma->vm_start)
+ return -EINVAL;
+
+ if (!dev->driver->gem_vm_ops)
+ return -EINVAL;
+
+ vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
+ vma->vm_ops = dev->driver->gem_vm_ops;
+ vma->vm_private_data = obj;
+ vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+
+ /* Take a ref for this mapping of the object, so that the fault
+ * handler can dereference the mmap offset's pointer to the object.
+ * This reference is cleaned up by the corresponding vm_close
+ * (which should happen whether the vma was created by this call, or
+ * by a vm_open due to mremap or partial unmap or whatever).
+ */
+ drm_gem_object_reference(obj);
+
+ drm_vm_open_locked(dev, vma);
+ return 0;
+}
+EXPORT_SYMBOL(drm_gem_mmap_obj);
/**
* drm_gem_mmap - memory map routine for GEM objects
@@ -653,11 +702,9 @@ EXPORT_SYMBOL(drm_gem_vm_close);
* If a driver supports GEM object mapping, mmap calls on the DRM file
* descriptor will end up here.
*
- * If we find the object based on the offset passed in (vma->vm_pgoff will
+ * Look up the GEM object based on the offset passed in (vma->vm_pgoff will
* contain the fake offset we created when the GTT map ioctl was called on
- * the object), we set up the driver fault handler so that any accesses
- * to the object can be trapped, to perform migration, GTT binding, surface
- * register allocation, or performance monitoring.
+ * the object) and map it with a call to drm_gem_mmap_obj().
*/
int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
{
@@ -665,7 +712,6 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
struct drm_device *dev = priv->minor->dev;
struct drm_gem_mm *mm = dev->mm_private;
struct drm_local_map *map = NULL;
- struct drm_gem_object *obj;
struct drm_hash_item *hash;
int ret = 0;
@@ -686,32 +732,7 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
goto out_unlock;
}
- /* Check for valid size. */
- if (map->size < vma->vm_end - vma->vm_start) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- obj = map->handle;
- if (!obj->dev->driver->gem_vm_ops) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
- vma->vm_ops = obj->dev->driver->gem_vm_ops;
- vma->vm_private_data = map->handle;
- vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
-
- /* Take a ref for this mapping of the object, so that the fault
- * handler can dereference the mmap offset's pointer to the object.
- * This reference is cleaned up by the corresponding vm_close
- * (which should happen whether the vma was created by this call, or
- * by a vm_open due to mremap or partial unmap or whatever).
- */
- drm_gem_object_reference(obj);
-
- drm_vm_open_locked(dev, vma);
+ ret = drm_gem_mmap_obj(map->handle, map->size, vma);
out_unlock:
mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 0a7e011509b..f94fcd75281 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/export.h>
+#include <linux/dma-buf.h>
#include <linux/dma-mapping.h>
#include <drm/drmP.h>
@@ -32,11 +33,44 @@ static unsigned int get_gem_mmap_offset(struct drm_gem_object *obj)
return (unsigned int)obj->map_list.hash.key << PAGE_SHIFT;
}
-static void drm_gem_cma_buf_destroy(struct drm_device *drm,
- struct drm_gem_cma_object *cma_obj)
+/*
+ * __drm_gem_cma_create - Create a GEM CMA object without allocating memory
+ * @drm: The drm device
+ * @size: The GEM object size
+ *
+ * This function creates and initializes a GEM CMA object of the given size, but
+ * doesn't allocate any memory to back the object.
+ *
+ * Return a struct drm_gem_cma_object* on success or ERR_PTR values on failure.
+ */
+static struct drm_gem_cma_object *
+__drm_gem_cma_create(struct drm_device *drm, unsigned int size)
{
- dma_free_writecombine(drm->dev, cma_obj->base.size, cma_obj->vaddr,
- cma_obj->paddr);
+ struct drm_gem_cma_object *cma_obj;
+ struct drm_gem_object *gem_obj;
+ int ret;
+
+ cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
+ if (!cma_obj)
+ return ERR_PTR(-ENOMEM);
+
+ gem_obj = &cma_obj->base;
+
+ ret = drm_gem_object_init(drm, gem_obj, size);
+ if (ret)
+ goto error;
+
+ ret = drm_gem_create_mmap_offset(gem_obj);
+ if (ret) {
+ drm_gem_object_release(gem_obj);
+ goto error;
+ }
+
+ return cma_obj;
+
+error:
+ kfree(cma_obj);
+ return ERR_PTR(ret);
}
/*
@@ -49,44 +83,42 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
unsigned int size)
{
struct drm_gem_cma_object *cma_obj;
- struct drm_gem_object *gem_obj;
+ struct sg_table *sgt = NULL;
int ret;
size = round_up(size, PAGE_SIZE);
- cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
- if (!cma_obj)
- return ERR_PTR(-ENOMEM);
+ cma_obj = __drm_gem_cma_create(drm, size);
+ if (IS_ERR(cma_obj))
+ return cma_obj;
cma_obj->vaddr = dma_alloc_writecombine(drm->dev, size,
&cma_obj->paddr, GFP_KERNEL | __GFP_NOWARN);
if (!cma_obj->vaddr) {
- dev_err(drm->dev, "failed to allocate buffer with size %d\n", size);
+ dev_err(drm->dev, "failed to allocate buffer with size %d\n",
+ size);
ret = -ENOMEM;
- goto err_dma_alloc;
+ goto error;
}
- gem_obj = &cma_obj->base;
+ sgt = kzalloc(sizeof(*cma_obj->sgt), GFP_KERNEL);
+ if (sgt == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
- ret = drm_gem_object_init(drm, gem_obj, size);
- if (ret)
- goto err_obj_init;
+ ret = dma_get_sgtable(drm->dev, sgt, cma_obj->vaddr,
+ cma_obj->paddr, size);
+ if (ret < 0)
+ goto error;
- ret = drm_gem_create_mmap_offset(gem_obj);
- if (ret)
- goto err_create_mmap_offset;
+ cma_obj->sgt = sgt;
return cma_obj;
-err_create_mmap_offset:
- drm_gem_object_release(gem_obj);
-
-err_obj_init:
- drm_gem_cma_buf_destroy(drm, cma_obj);
-
-err_dma_alloc:
- kfree(cma_obj);
-
+error:
+ kfree(sgt);
+ drm_gem_cma_free_object(&cma_obj->base);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(drm_gem_cma_create);
@@ -143,11 +175,20 @@ void drm_gem_cma_free_object(struct drm_gem_object *gem_obj)
if (gem_obj->map_list.map)
drm_gem_free_mmap_offset(gem_obj);
- drm_gem_object_release(gem_obj);
-
cma_obj = to_drm_gem_cma_obj(gem_obj);
- drm_gem_cma_buf_destroy(gem_obj->dev, cma_obj);
+ if (cma_obj->vaddr) {
+ dma_free_writecombine(gem_obj->dev->dev, cma_obj->base.size,
+ cma_obj->vaddr, cma_obj->paddr);
+ if (cma_obj->sgt) {
+ sg_free_table(cma_obj->sgt);
+ kfree(cma_obj->sgt);
+ }
+ } else if (gem_obj->import_attach) {
+ drm_prime_gem_destroy(gem_obj, cma_obj->sgt);
+ }
+
+ drm_gem_object_release(gem_obj);
kfree(cma_obj);
}
@@ -215,13 +256,26 @@ const struct vm_operations_struct drm_gem_cma_vm_ops = {
};
EXPORT_SYMBOL_GPL(drm_gem_cma_vm_ops);
+static int drm_gem_cma_mmap_obj(struct drm_gem_cma_object *cma_obj,
+ struct vm_area_struct *vma)
+{
+ int ret;
+
+ ret = remap_pfn_range(vma, vma->vm_start, cma_obj->paddr >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start, vma->vm_page_prot);
+ if (ret)
+ drm_gem_vm_close(vma);
+
+ return ret;
+}
+
/*
* drm_gem_cma_mmap - (struct file_operation)->mmap callback function
*/
int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma)
{
- struct drm_gem_object *gem_obj;
struct drm_gem_cma_object *cma_obj;
+ struct drm_gem_object *gem_obj;
int ret;
ret = drm_gem_mmap(filp, vma);
@@ -231,12 +285,7 @@ int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma)
gem_obj = vma->vm_private_data;
cma_obj = to_drm_gem_cma_obj(gem_obj);
- ret = remap_pfn_range(vma, vma->vm_start, cma_obj->paddr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
- if (ret)
- drm_gem_vm_close(vma);
-
- return ret;
+ return drm_gem_cma_mmap_obj(cma_obj, vma);
}
EXPORT_SYMBOL_GPL(drm_gem_cma_mmap);
@@ -270,3 +319,286 @@ void drm_gem_cma_describe(struct drm_gem_cma_object *cma_obj, struct seq_file *m
}
EXPORT_SYMBOL_GPL(drm_gem_cma_describe);
#endif
+
+/* -----------------------------------------------------------------------------
+ * DMA-BUF
+ */
+
+struct drm_gem_cma_dmabuf_attachment {
+ struct sg_table sgt;
+ enum dma_data_direction dir;
+};
+
+static int drm_gem_cma_dmabuf_attach(struct dma_buf *dmabuf, struct device *dev,
+ struct dma_buf_attachment *attach)
+{
+ struct drm_gem_cma_dmabuf_attachment *cma_attach;
+
+ cma_attach = kzalloc(sizeof(*cma_attach), GFP_KERNEL);
+ if (!cma_attach)
+ return -ENOMEM;
+
+ cma_attach->dir = DMA_NONE;
+ attach->priv = cma_attach;
+
+ return 0;
+}
+
+static void drm_gem_cma_dmabuf_detach(struct dma_buf *dmabuf,
+ struct dma_buf_attachment *attach)
+{
+ struct drm_gem_cma_dmabuf_attachment *cma_attach = attach->priv;
+ struct sg_table *sgt;
+
+ if (cma_attach == NULL)
+ return;
+
+ sgt = &cma_attach->sgt;
+
+ if (cma_attach->dir != DMA_NONE)
+ dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents,
+ cma_attach->dir);
+
+ sg_free_table(sgt);
+ kfree(cma_attach);
+ attach->priv = NULL;
+}
+
+static struct sg_table *
+drm_gem_cma_dmabuf_map(struct dma_buf_attachment *attach,
+ enum dma_data_direction dir)
+{
+ struct drm_gem_cma_dmabuf_attachment *cma_attach = attach->priv;
+ struct drm_gem_cma_object *cma_obj = attach->dmabuf->priv;
+ struct drm_device *drm = cma_obj->base.dev;
+ struct scatterlist *rd, *wr;
+ struct sg_table *sgt;
+ unsigned int i;
+ int nents, ret;
+
+ DRM_DEBUG_PRIME("\n");
+
+ if (WARN_ON(dir == DMA_NONE))
+ return ERR_PTR(-EINVAL);
+
+ /* Return the cached mapping when possible. */
+ if (cma_attach->dir == dir)
+ return &cma_attach->sgt;
+
+ /* Two mappings with different directions for the same attachment are
+ * not allowed.
+ */
+ if (WARN_ON(cma_attach->dir != DMA_NONE))
+ return ERR_PTR(-EBUSY);
+
+ sgt = &cma_attach->sgt;
+
+ ret = sg_alloc_table(sgt, cma_obj->sgt->orig_nents, GFP_KERNEL);
+ if (ret) {
+ DRM_ERROR("failed to alloc sgt.\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ mutex_lock(&drm->struct_mutex);
+
+ rd = cma_obj->sgt->sgl;
+ wr = sgt->sgl;
+ for (i = 0; i < sgt->orig_nents; ++i) {
+ sg_set_page(wr, sg_page(rd), rd->length, rd->offset);
+ rd = sg_next(rd);
+ wr = sg_next(wr);
+ }
+
+ nents = dma_map_sg(attach->dev, sgt->sgl, sgt->orig_nents, dir);
+ if (!nents) {
+ DRM_ERROR("failed to map sgl with iommu.\n");
+ sg_free_table(sgt);
+ sgt = ERR_PTR(-EIO);
+ goto done;
+ }
+
+ cma_attach->dir = dir;
+ attach->priv = cma_attach;
+
+ DRM_DEBUG_PRIME("buffer size = %zu\n", cma_obj->base.size);
+
+done:
+ mutex_unlock(&drm->struct_mutex);
+ return sgt;
+}
+
+static void drm_gem_cma_dmabuf_unmap(struct dma_buf_attachment *attach,
+ struct sg_table *sgt,
+ enum dma_data_direction dir)
+{
+ /* Nothing to do. */
+}
+
+static void drm_gem_cma_dmabuf_release(struct dma_buf *dmabuf)
+{
+ struct drm_gem_cma_object *cma_obj = dmabuf->priv;
+
+ DRM_DEBUG_PRIME("%s\n", __FILE__);
+
+ /*
+ * drm_gem_cma_dmabuf_release() call means that file object's
+ * f_count is 0 and it calls drm_gem_object_handle_unreference()
+ * to drop the references that these values had been increased
+ * at drm_prime_handle_to_fd()
+ */
+ if (cma_obj->base.export_dma_buf == dmabuf) {
+ cma_obj->base.export_dma_buf = NULL;
+
+ /*
+ * drop this gem object refcount to release allocated buffer
+ * and resources.
+ */
+ drm_gem_object_unreference_unlocked(&cma_obj->base);
+ }
+}
+
+static void *drm_gem_cma_dmabuf_kmap_atomic(struct dma_buf *dmabuf,
+ unsigned long page_num)
+{
+ /* TODO */
+
+ return NULL;
+}
+
+static void drm_gem_cma_dmabuf_kunmap_atomic(struct dma_buf *dmabuf,
+ unsigned long page_num, void *addr)
+{
+ /* TODO */
+}
+
+static void *drm_gem_cma_dmabuf_kmap(struct dma_buf *dmabuf,
+ unsigned long page_num)
+{
+ /* TODO */
+
+ return NULL;
+}
+
+static void drm_gem_cma_dmabuf_kunmap(struct dma_buf *dmabuf,
+ unsigned long page_num, void *addr)
+{
+ /* TODO */
+}
+
+static int drm_gem_cma_dmabuf_mmap(struct dma_buf *dmabuf,
+ struct vm_area_struct *vma)
+{
+ struct drm_gem_cma_object *cma_obj = dmabuf->priv;
+ struct drm_gem_object *gem_obj = &cma_obj->base;
+ int ret;
+
+ ret = drm_gem_mmap_obj(gem_obj, gem_obj->size, vma);
+ if (ret < 0)
+ return ret;
+
+ return drm_gem_cma_mmap_obj(cma_obj, vma);
+}
+
+static void *drm_gem_cma_dmabuf_vmap(struct dma_buf *dmabuf)
+{
+ struct drm_gem_cma_object *cma_obj = dmabuf->priv;
+
+ return cma_obj->vaddr;
+}
+
+static struct dma_buf_ops drm_gem_cma_dmabuf_ops = {
+ .attach = drm_gem_cma_dmabuf_attach,
+ .detach = drm_gem_cma_dmabuf_detach,
+ .map_dma_buf = drm_gem_cma_dmabuf_map,
+ .unmap_dma_buf = drm_gem_cma_dmabuf_unmap,
+ .kmap = drm_gem_cma_dmabuf_kmap,
+ .kmap_atomic = drm_gem_cma_dmabuf_kmap_atomic,
+ .kunmap = drm_gem_cma_dmabuf_kunmap,
+ .kunmap_atomic = drm_gem_cma_dmabuf_kunmap_atomic,
+ .mmap = drm_gem_cma_dmabuf_mmap,
+ .vmap = drm_gem_cma_dmabuf_vmap,
+ .release = drm_gem_cma_dmabuf_release,
+};
+
+struct dma_buf *drm_gem_cma_dmabuf_export(struct drm_device *drm,
+ struct drm_gem_object *obj, int flags)
+{
+ struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
+
+ return dma_buf_export(cma_obj, &drm_gem_cma_dmabuf_ops,
+ cma_obj->base.size, flags);
+}
+EXPORT_SYMBOL_GPL(drm_gem_cma_dmabuf_export);
+
+struct drm_gem_object *drm_gem_cma_dmabuf_import(struct drm_device *drm,
+ struct dma_buf *dma_buf)
+{
+ struct drm_gem_cma_object *cma_obj;
+ struct dma_buf_attachment *attach;
+ struct sg_table *sgt;
+ int ret;
+
+ DRM_DEBUG_PRIME("%s\n", __FILE__);
+
+ /* is this one of own objects? */
+ if (dma_buf->ops == &drm_gem_cma_dmabuf_ops) {
+ struct drm_gem_object *obj;
+
+ cma_obj = dma_buf->priv;
+ obj = &cma_obj->base;
+
+ /* is it from our device? */
+ if (obj->dev == drm) {
+ /*
+ * Importing dmabuf exported from out own gem increases
+ * refcount on gem itself instead of f_count of dmabuf.
+ */
+ drm_gem_object_reference(obj);
+ dma_buf_put(dma_buf);
+ return obj;
+ }
+ }
+
+ /* Create a CMA GEM buffer. */
+ cma_obj = __drm_gem_cma_create(drm, dma_buf->size);
+ if (IS_ERR(cma_obj))
+ return ERR_PTR(PTR_ERR(cma_obj));
+
+ /* Attach to the buffer and map it. Make sure the mapping is contiguous
+ * on the device memory bus, as that's all we support.
+ */
+ attach = dma_buf_attach(dma_buf, drm->dev);
+ if (IS_ERR(attach)) {
+ ret = -EINVAL;
+ goto error_gem_free;
+ }
+
+ sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
+ if (IS_ERR_OR_NULL(sgt)) {
+ ret = sgt ? PTR_ERR(sgt) : -ENOMEM;
+ goto error_buf_detach;
+ }
+
+ if (sgt->nents != 1) {
+ ret = -EINVAL;
+ goto error_buf_unmap;
+ }
+
+ cma_obj->base.import_attach = attach;
+ cma_obj->paddr = sg_dma_address(sgt->sgl);
+ cma_obj->sgt = sgt;
+
+ DRM_DEBUG_PRIME("dma_addr = 0x%x, size = %zu\n", cma_obj->paddr,
+ dma_buf->size);
+
+ return &cma_obj->base;
+
+error_buf_unmap:
+ dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
+error_buf_detach:
+ dma_buf_detach(dma_buf, attach);
+error_gem_free:
+ drm_gem_cma_free_object(&cma_obj->base);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(drm_gem_cma_dmabuf_import);
diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
index be7cd97a0db..3256693de11 100644
--- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
@@ -136,10 +136,6 @@ static void omap_gem_dmabuf_kunmap(struct dma_buf *buffer,
kunmap(pages[page_num]);
}
-/*
- * TODO maybe we can split up drm_gem_mmap to avoid duplicating
- * some here.. or at least have a drm_dmabuf_mmap helper.
- */
static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
struct vm_area_struct *vma)
{
@@ -149,31 +145,9 @@ static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
if (WARN_ON(!obj->filp))
return -EINVAL;
- /* Check for valid size. */
- if (omap_gem_mmap_size(obj) < vma->vm_end - vma->vm_start) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- if (!obj->dev->driver->gem_vm_ops) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
- vma->vm_ops = obj->dev->driver->gem_vm_ops;
- vma->vm_private_data = obj;
- vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
-
- /* Take a ref for this mapping of the object, so that the fault
- * handler can dereference the mmap offset's pointer to the object.
- * This reference is cleaned up by the corresponding vm_close
- * (which should happen whether the vma was created by this call, or
- * by a vm_open due to mremap or partial unmap or whatever).
- */
- vma->vm_ops->open(vma);
-
-out_unlock:
+ ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma);
+ if (ret < 0)
+ return ret;
return omap_gem_mmap_obj(obj, vma);
}
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index e4f765c80fb..82670ac0d77 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1616,6 +1616,8 @@ int drm_gem_private_object_init(struct drm_device *dev,
void drm_gem_object_handle_free(struct drm_gem_object *obj);
void drm_gem_vm_open(struct vm_area_struct *vma);
void drm_gem_vm_close(struct vm_area_struct *vma);
+int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
+ struct vm_area_struct *vma);
int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
#include <drm/drm_global.h>
diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
index 63397ced925..6e17251e9b2 100644
--- a/include/drm/drm_gem_cma_helper.h
+++ b/include/drm/drm_gem_cma_helper.h
@@ -4,6 +4,9 @@
struct drm_gem_cma_object {
struct drm_gem_object base;
dma_addr_t paddr;
+ struct sg_table *sgt;
+
+ /* For objects with DMA memory allocated by GEM CMA */
void *vaddr;
};
@@ -45,4 +48,10 @@ extern const struct vm_operations_struct drm_gem_cma_vm_ops;
void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
#endif
+struct dma_buf *drm_gem_cma_dmabuf_export(struct drm_device *drm_dev,
+ struct drm_gem_object *obj,
+ int flags);
+struct drm_gem_object *drm_gem_cma_dmabuf_import(struct drm_device *drm_dev,
+ struct dma_buf *dma_buf);
+
#endif /* __DRM_GEM_CMA_HELPER_H__ */