vmwgfx: add dumb ioctl support

Testing and works with the -modesetting driver,

Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 88 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 33bfc2033009..ba2c35dbf10e 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1155,6 +1155,11 @@ static struct drm_driver driver = {
         .open = vmw_driver_open,
         .preclose = vmw_preclose,
         .postclose = vmw_postclose,
+
+        .dumb_create = vmw_dumb_create,
+        .dumb_map_offset = vmw_dumb_map_offset,
+        .dumb_destroy = vmw_dumb_destroy,
+
         .fops = &vmwgfx_driver_fops,
         .name = VMWGFX_DRIVER_NAME,
         .desc = VMWGFX_DRIVER_DESC,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index d0f2c079ee27..29c984ff7f23 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -645,6 +645,16 @@ int vmw_kms_readback(struct vmw_private *dev_priv,
 int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
                                 struct drm_file *file_priv);
 
+int vmw_dumb_create(struct drm_file *file_priv,
+                    struct drm_device *dev,
+                    struct drm_mode_create_dumb *args);
+
+int vmw_dumb_map_offset(struct drm_file *file_priv,
+                        struct drm_device *dev, uint32_t handle,
+                        uint64_t *offset);
+int vmw_dumb_destroy(struct drm_file *file_priv,
+                     struct drm_device *dev,
+                     uint32_t handle);
 /**
  * Overlay control - vmwgfx_overlay.c
  */
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index 22bf9a21ec71..2c6ffe0e2c07 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -1917,3 +1917,76 @@ err_ref:
         vmw_resource_unreference(&res);
         return ret;
 }
+
+
+int vmw_dumb_create(struct drm_file *file_priv,
+                    struct drm_device *dev,
+                    struct drm_mode_create_dumb *args)
+{
+        struct vmw_private *dev_priv = vmw_priv(dev);
+        struct vmw_master *vmaster = vmw_master(file_priv->master);
+        struct vmw_user_dma_buffer *vmw_user_bo;
+        struct ttm_buffer_object *tmp;
+        int ret;
+
+        args->pitch = args->width * ((args->bpp + 7) / 8);
+        args->size = args->pitch * args->height;
+
+        vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
+        if (vmw_user_bo == NULL)
+                return -ENOMEM;
+
+        ret = ttm_read_lock(&vmaster->lock, true);
+        if (ret != 0) {
+                kfree(vmw_user_bo);
+                return ret;
+        }
+
+        ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, args->size,
+                              &vmw_vram_sys_placement, true,
+                              &vmw_user_dmabuf_destroy);
+        if (ret != 0)
+                goto out_no_dmabuf;
+
+        tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
+        ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
+                                   &vmw_user_bo->base,
+                                   false,
+                                   ttm_buffer_type,
+                                   &vmw_user_dmabuf_release, NULL);
+        if (unlikely(ret != 0))
+                goto out_no_base_object;
+
+        args->handle = vmw_user_bo->base.hash.key;
+
+out_no_base_object:
+        ttm_bo_unref(&tmp);
+out_no_dmabuf:
+        ttm_read_unlock(&vmaster->lock);
+        return ret;
+}
+
+int vmw_dumb_map_offset(struct drm_file *file_priv,
+                        struct drm_device *dev, uint32_t handle,
+                        uint64_t *offset)
+{
+        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+        struct vmw_dma_buffer *out_buf;
+        int ret;
+
+        ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf);
+        if (ret != 0)
+                return -EINVAL;
+
+        *offset = out_buf->base.addr_space_offset;
+        vmw_dmabuf_unreference(&out_buf);
+        return 0;
+}
+
+int vmw_dumb_destroy(struct drm_file *file_priv,
+                     struct drm_device *dev,
+                     uint32_t handle)
+{
+        return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
+                                         handle, TTM_REF_USAGE);
+}