/* the dumb interface doesn't work with the GEM straight MMAP
interface, it expects to do MMAP on the drm fd, like normal */
int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
uint32_t handle, uint64_t *offset)
{
struct udl_gem_object *gobj;
struct drm_gem_object *obj;
int ret = 0;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(file, handle);
if (obj == NULL) {
ret = -ENOENT;
goto unlock;
}
gobj = to_udl_bo(obj);
ret = udl_gem_get_pages(gobj);
if (ret)
goto out;
ret = drm_gem_create_mmap_offset(obj);
if (ret)
goto out;
*offset = drm_vma_node_offset_addr(&gobj->base.vma_node);
out:
drm_gem_object_unreference(&gobj->base);
unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
/* the dumb interface doesn't work with the GEM straight MMAP
interface, it expects to do MMAP on the drm fd, like normal */
int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
uint32_t handle, uint64_t *offset)
{
struct udl_gem_object *gobj;
struct drm_gem_object *obj;
int ret = 0;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file, handle);
if (obj == NULL) {
ret = -ENOENT;
goto unlock;
}
gobj = to_udl_bo(obj);
ret = udl_gem_get_pages(gobj, GFP_KERNEL);
if (ret)
goto out;
if (!gobj->base.map_list.map) {
ret = drm_gem_create_mmap_offset(obj);
if (ret)
goto out;
}
*offset = (u64)gobj->base.map_list.hash.key << PAGE_SHIFT;
out:
drm_gem_object_unreference(&gobj->base);
unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
int udl_gem_vmap(struct udl_gem_object *obj)
{
int page_count = obj->base.size / PAGE_SIZE;
int ret;
if (obj->base.import_attach) {
ret = dma_buf_begin_cpu_access(obj->base.import_attach->dmabuf,
0, obj->base.size, DMA_BIDIRECTIONAL);
if (ret)
return -EINVAL;
obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf);
if (!obj->vmapping)
return -ENOMEM;
return 0;
}
ret = udl_gem_get_pages(obj, GFP_KERNEL);
if (ret)
return ret;
obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL);
if (!obj->vmapping)
return -ENOMEM;
return 0;
}
int udl_gem_vmap(struct udl_gem_object *obj)
{
int page_count = obj->base.size / PAGE_SIZE;
int ret;
ret = udl_gem_get_pages(obj, GFP_KERNEL);
if (ret)
return ret;
obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL);
if (!obj->vmapping)
return -ENOMEM;
return 0;
}
int udl_gem_vmap(struct udl_gem_object *obj)
{
int page_count = obj->base.size / PAGE_SIZE;
int ret;
if (obj->base.import_attach) {
obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf);
if (!obj->vmapping)
return -ENOMEM;
return 0;
}
ret = udl_gem_get_pages(obj);
if (ret)
return ret;
obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL);
if (!obj->vmapping)
return -ENOMEM;
return 0;
}
static struct sg_table *udl_map_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir)
{
struct udl_drm_dmabuf_attachment *udl_attach = attach->priv;
struct udl_gem_object *obj = to_udl_bo(attach->dmabuf->priv);
struct drm_device *dev = obj->base.dev;
struct scatterlist *rd, *wr;
struct sg_table *sgt = NULL;
unsigned int i;
int page_count;
int nents, ret;
DRM_DEBUG_PRIME("[DEV:%s] size:%zd dir=%d\n", dev_name(attach->dev),
attach->dmabuf->size, dir);
/* just return current sgt if already requested. */
if (udl_attach->dir == dir && udl_attach->is_mapped)
return &udl_attach->sgt;
if (!obj->pages) {
ret = udl_gem_get_pages(obj);
if (ret) {
DRM_ERROR("failed to map pages.\n");
return ERR_PTR(ret);
}
}
page_count = obj->base.size / PAGE_SIZE;
obj->sg = drm_prime_pages_to_sg(obj->pages, page_count);
if (IS_ERR(obj->sg)) {
DRM_ERROR("failed to allocate sgt.\n");
return ERR_CAST(obj->sg);
}
sgt = &udl_attach->sgt;
ret = sg_alloc_table(sgt, obj->sg->orig_nents, GFP_KERNEL);
if (ret) {
DRM_ERROR("failed to alloc sgt.\n");
return ERR_PTR(-ENOMEM);
}
mutex_lock(&dev->struct_mutex);
rd = obj->sg->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);
}
if (dir != DMA_NONE) {
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 err_unlock;
}
}
udl_attach->is_mapped = true;
udl_attach->dir = dir;
attach->priv = udl_attach;
err_unlock:
mutex_unlock(&dev->struct_mutex);
return sgt;
}