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;
}
/**
* tinydrm_gem_cma_prime_import_sg_table - Produce a CMA GEM object from
* another driver's scatter/gather table of pinned pages
* @drm: DRM device to import into
* @attach: DMA-BUF attachment
* @sgt: Scatter/gather table of pinned pages
*
* This function imports a scatter/gather table exported via DMA-BUF by
* another driver using drm_gem_cma_prime_import_sg_table(). It sets the
* kernel virtual address on the CMA object. Drivers should use this as their
* &drm_driver->gem_prime_import_sg_table callback if they need the virtual
* address. tinydrm_gem_cma_free_object() should be used in combination with
* this function.
*
* Returns:
* A pointer to a newly created GEM object or an ERR_PTR-encoded negative
* error code on failure.
*/
struct drm_gem_object *
tinydrm_gem_cma_prime_import_sg_table(struct drm_device *drm,
struct dma_buf_attachment *attach,
struct sg_table *sgt)
{
struct drm_gem_cma_object *cma_obj;
struct drm_gem_object *obj;
void *vaddr;
vaddr = dma_buf_vmap(attach->dmabuf);
if (!vaddr) {
DRM_ERROR("Failed to vmap PRIME buffer\n");
return ERR_PTR(-ENOMEM);
}
obj = drm_gem_cma_prime_import_sg_table(drm, attach, sgt);
if (IS_ERR(obj)) {
dma_buf_vunmap(attach->dmabuf, vaddr);
return obj;
}
cma_obj = to_drm_gem_cma_obj(obj);
cma_obj->vaddr = vaddr;
return obj;
}
static int adf_fb_alloc(struct adf_fbdev *fbdev)
{
int ret;
ret = adf_interface_simple_buffer_alloc(fbdev->intf,
fbdev->default_xres_virtual,
fbdev->default_yres_virtual,
fbdev->default_format,
&fbdev->dma_buf, &fbdev->offset, &fbdev->pitch);
if (ret < 0) {
dev_err(fbdev->info->dev, "allocating fb failed: %d\n", ret);
return ret;
}
fbdev->vaddr = dma_buf_vmap(fbdev->dma_buf);
if (!fbdev->vaddr) {
ret = -ENOMEM;
dev_err(fbdev->info->dev, "vmapping fb failed\n");
goto err_vmap;
}
fbdev->info->fix.line_length = fbdev->pitch;
fbdev->info->var.xres_virtual = fbdev->default_xres_virtual;
fbdev->info->var.yres_virtual = fbdev->default_yres_virtual;
fbdev->info->fix.smem_len = fbdev->dma_buf->size;
fbdev->info->screen_base = fbdev->vaddr;
return 0;
err_vmap:
dma_buf_put(fbdev->dma_buf);
return ret;
}
static int igt_dmabuf_import_ownership(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
struct dma_buf *dmabuf;
void *ptr;
int err;
dmabuf = mock_dmabuf(1);
if (IS_ERR(dmabuf))
return PTR_ERR(dmabuf);
ptr = dma_buf_vmap(dmabuf);
if (!ptr) {
pr_err("dma_buf_vmap failed\n");
err = -ENOMEM;
goto err_dmabuf;
}
memset(ptr, 0xc5, PAGE_SIZE);
dma_buf_vunmap(dmabuf, ptr);
obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
if (IS_ERR(obj)) {
pr_err("i915_gem_prime_import failed with err=%d\n",
(int)PTR_ERR(obj));
err = PTR_ERR(obj);
goto err_dmabuf;
}
dma_buf_put(dmabuf);
err = i915_gem_object_pin_pages(obj);
if (err) {
pr_err("i915_gem_object_pin_pages failed with err=%d\n", err);
goto out_obj;
}
err = 0;
i915_gem_object_unpin_pages(obj);
out_obj:
i915_gem_object_put(obj);
return err;
err_dmabuf:
dma_buf_put(dmabuf);
return err;
}
static void *vb2_dma_sg_vaddr(void *buf_priv)
{
struct vb2_dma_sg_buf *buf = buf_priv;
BUG_ON(!buf);
if (!buf->vaddr) {
if (buf->db_attach)
buf->vaddr = dma_buf_vmap(buf->db_attach->dmabuf);
else
buf->vaddr = vm_map_ram(buf->pages,
buf->num_pages, -1, PAGE_KERNEL);
}
/* add offset in case userptr is not page-aligned */
return buf->vaddr ? buf->vaddr + buf->offset : NULL;
}
static int igt_dmabuf_export_vmap(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
struct dma_buf *dmabuf;
void *ptr;
int err;
obj = i915_gem_object_create(i915, PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0);
if (IS_ERR(dmabuf)) {
pr_err("i915_gem_prime_export failed with err=%d\n",
(int)PTR_ERR(dmabuf));
err = PTR_ERR(dmabuf);
goto err_obj;
}
i915_gem_object_put(obj);
ptr = dma_buf_vmap(dmabuf);
if (IS_ERR(ptr)) {
err = PTR_ERR(ptr);
pr_err("dma_buf_vmap failed with err=%d\n", err);
goto out;
}
if (memchr_inv(ptr, 0, dmabuf->size)) {
pr_err("Exported object not initialiased to zero!\n");
err = -EINVAL;
goto out;
}
memset(ptr, 0xc5, dmabuf->size);
err = 0;
dma_buf_vunmap(dmabuf, ptr);
out:
dma_buf_put(dmabuf);
return err;
err_obj:
i915_gem_object_put(obj);
return err;
}
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;
}
void *nvhost_dmabuf_mmap(struct mem_handle *handle)
{
return dma_buf_vmap(to_dmabuf(handle));
}
static int igt_dmabuf_import(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
struct dma_buf *dmabuf;
void *obj_map, *dma_map;
u32 pattern[] = { 0, 0xaa, 0xcc, 0x55, 0xff };
int err, i;
dmabuf = mock_dmabuf(1);
if (IS_ERR(dmabuf))
return PTR_ERR(dmabuf);
obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
if (IS_ERR(obj)) {
pr_err("i915_gem_prime_import failed with err=%d\n",
(int)PTR_ERR(obj));
err = PTR_ERR(obj);
goto out_dmabuf;
}
if (obj->base.dev != &i915->drm) {
pr_err("i915_gem_prime_import created a non-i915 object!\n");
err = -EINVAL;
goto out_obj;
}
if (obj->base.size != PAGE_SIZE) {
pr_err("i915_gem_prime_import is wrong size found %lld, expected %ld\n",
(long long)obj->base.size, PAGE_SIZE);
err = -EINVAL;
goto out_obj;
}
dma_map = dma_buf_vmap(dmabuf);
if (!dma_map) {
pr_err("dma_buf_vmap failed\n");
err = -ENOMEM;
goto out_obj;
}
if (0) { /* Can not yet map dmabuf */
obj_map = i915_gem_object_pin_map(obj, I915_MAP_WB);
if (IS_ERR(obj_map)) {
err = PTR_ERR(obj_map);
pr_err("i915_gem_object_pin_map failed with err=%d\n", err);
goto out_dma_map;
}
for (i = 0; i < ARRAY_SIZE(pattern); i++) {
memset(dma_map, pattern[i], PAGE_SIZE);
if (memchr_inv(obj_map, pattern[i], PAGE_SIZE)) {
err = -EINVAL;
pr_err("imported vmap not all set to %x!\n", pattern[i]);
i915_gem_object_unpin_map(obj);
goto out_dma_map;
}
}
for (i = 0; i < ARRAY_SIZE(pattern); i++) {
memset(obj_map, pattern[i], PAGE_SIZE);
if (memchr_inv(dma_map, pattern[i], PAGE_SIZE)) {
err = -EINVAL;
pr_err("exported vmap not all set to %x!\n", pattern[i]);
i915_gem_object_unpin_map(obj);
goto out_dma_map;
}
}
i915_gem_object_unpin_map(obj);
}
err = 0;
out_dma_map:
dma_buf_vunmap(dmabuf, dma_map);
out_obj:
i915_gem_object_put(obj);
out_dmabuf:
dma_buf_put(dmabuf);
return err;
}
