drm/vmwgfx: Hook up the prime ioctls

Also provide a completely dumb dma-buf ops implementation.
Once we have other virtual dma-buf aware devices, we need to provide
something better.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>

4 files changed, 157 insertions, 3 deletions

diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile
index 2cc6cd91ac11..9f8b690bcf52 100644
--- a/drivers/gpu/drm/vmwgfx/Makefile
+++ b/drivers/gpu/drm/vmwgfx/Makefile
@@ -6,6 +6,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
             vmwgfx_fifo.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \
             vmwgfx_overlay.o vmwgfx_marker.o vmwgfx_gmrid_manager.o \
             vmwgfx_fence.o vmwgfx_dmabuf.o vmwgfx_scrn.o vmwgfx_context.o \
-            vmwgfx_surface.o
+            vmwgfx_surface.o vmwgfx_prime.o
 
 obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 20d5485eaf98..c7a549694e59 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -677,7 +677,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
         }
 
         dev_priv->tdev = ttm_object_device_init
-            (dev_priv->mem_global_ref.object, 12);
+                (dev_priv->mem_global_ref.object, 12, &vmw_prime_dmabuf_ops);
 
         if (unlikely(dev_priv->tdev == NULL)) {
                 DRM_ERROR("Unable to initialize TTM object management.\n");
@@ -1210,7 +1210,7 @@ static const struct file_operations vmwgfx_driver_fops = {
 
 static struct drm_driver driver = {
         .driver_features = DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
-        DRIVER_MODESET,
+        DRIVER_MODESET | DRIVER_PRIME,
         .load = vmw_driver_load,
         .unload = vmw_driver_unload,
         .lastclose = vmw_lastclose,
@@ -1235,6 +1235,9 @@ static struct drm_driver driver = {
         .dumb_map_offset = vmw_dumb_map_offset,
         .dumb_destroy = vmw_dumb_destroy,
 
+        .prime_fd_to_handle = vmw_prime_fd_to_handle,
+        .prime_handle_to_fd = vmw_prime_handle_to_fd,
+
         .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 e401d5dbcb96..db85985c7086 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -819,6 +819,20 @@ int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv);
 extern const struct ttm_mem_type_manager_func vmw_gmrid_manager_func;
 
 /**
+ * Prime - vmwgfx_prime.c
+ */
+
+extern const struct dma_buf_ops vmw_prime_dmabuf_ops;
+extern int vmw_prime_fd_to_handle(struct drm_device *dev,
+                                  struct drm_file *file_priv,
+                                  int fd, u32 *handle);
+extern int vmw_prime_handle_to_fd(struct drm_device *dev,
+                                  struct drm_file *file_priv,
+                                  uint32_t handle, uint32_t flags,
+                                  int *prime_fd);
+
+
+/**
  * Inline helper functions
  */
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c
new file mode 100644
index 000000000000..31fe32d8d65a
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c
@@ -0,0 +1,137 @@
+/**************************************************************************
+ *
+ * Copyright © 2013 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+/*
+ * Authors:
+ *     Thomas Hellstrom <thellstrom@vmware.com>
+ *
+ */
+
+#include "vmwgfx_drv.h"
+#include <linux/dma-buf.h>
+#include <drm/ttm/ttm_object.h>
+
+/*
+ * DMA-BUF attach- and mapping methods. No need to implement
+ * these until we have other virtual devices use them.
+ */
+
+static int vmw_prime_map_attach(struct dma_buf *dma_buf,
+                                struct device *target_dev,
+                                struct dma_buf_attachment *attach)
+{
+        return -ENOSYS;
+}
+
+static void vmw_prime_map_detach(struct dma_buf *dma_buf,
+                                 struct dma_buf_attachment *attach)
+{
+}
+
+static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
+                                              enum dma_data_direction dir)
+{
+        return ERR_PTR(-ENOSYS);
+}
+
+static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
+                                    struct sg_table *sgb,
+                                    enum dma_data_direction dir)
+{
+}
+
+static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
+{
+        return NULL;
+}
+
+static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
+{
+}
+
+static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
+                unsigned long page_num)
+{
+        return NULL;
+}
+
+static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
+                unsigned long page_num, void *addr)
+{
+
+}
+static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
+                unsigned long page_num)
+{
+        return NULL;
+}
+
+static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
+                unsigned long page_num, void *addr)
+{
+
+}
+
+static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf,
+                                 struct vm_area_struct *vma)
+{
+        WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n");
+        return -ENOSYS;
+}
+
+const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
+        .attach = vmw_prime_map_attach,
+        .detach = vmw_prime_map_detach,
+        .map_dma_buf = vmw_prime_map_dma_buf,
+        .unmap_dma_buf = vmw_prime_unmap_dma_buf,
+        .release = NULL,
+        .kmap = vmw_prime_dmabuf_kmap,
+        .kmap_atomic = vmw_prime_dmabuf_kmap_atomic,
+        .kunmap = vmw_prime_dmabuf_kunmap,
+        .kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic,
+        .mmap = vmw_prime_dmabuf_mmap,
+        .vmap = vmw_prime_dmabuf_vmap,
+        .vunmap = vmw_prime_dmabuf_vunmap,
+};
+
+int vmw_prime_fd_to_handle(struct drm_device *dev,
+                           struct drm_file *file_priv,
+                           int fd, u32 *handle)
+{
+        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+
+        return ttm_prime_fd_to_handle(tfile, fd, handle);
+}
+
+int vmw_prime_handle_to_fd(struct drm_device *dev,
+                           struct drm_file *file_priv,
+                           uint32_t handle, uint32_t flags,
+                           int *prime_fd)
+{
+        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+
+        return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
+}