5 files changed, 117 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
index 18faa5ba37b7..06cba268e17a 100644
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -19,6 +19,7 @@
  */
 
 #include "vc4_drv.h"
+#include "uapi/drm/vc4_drm.h"
 
 static void vc4_bo_stats_dump(struct vc4_dev *vc4)
 {
@@ -346,6 +347,46 @@ static void vc4_bo_cache_time_timer(unsigned long data)
         schedule_work(&vc4->bo_cache.time_work);
 }
 
+int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
+                        struct drm_file *file_priv)
+{
+        struct drm_vc4_create_bo *args = data;
+        struct vc4_bo *bo = NULL;
+        int ret;
+
+        /*
+         * We can't allocate from the BO cache, because the BOs don't
+         * get zeroed, and that might leak data between users.
+         */
+        bo = vc4_bo_create(dev, args->size, false);
+        if (!bo)
+                return -ENOMEM;
+
+        ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
+        drm_gem_object_unreference_unlocked(&bo->base.base);
+
+        return ret;
+}
+
+int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
+                      struct drm_file *file_priv)
+{
+        struct drm_vc4_mmap_bo *args = data;
+        struct drm_gem_object *gem_obj;
+
+        gem_obj = drm_gem_object_lookup(dev, file_priv, args->handle);
+        if (!gem_obj) {
+                DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
+                return -EINVAL;
+        }
+
+        /* The mmap offset was set up at BO allocation time. */
+        args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
+
+        drm_gem_object_unreference_unlocked(gem_obj);
+        return 0;
+}
+
 void vc4_bo_cache_init(struct drm_device *dev)
 {
         struct vc4_dev *vc4 = to_vc4_dev(dev);
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index da041fac0731..5fa468864ec8 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include "drm_fb_cma_helper.h"
 
+#include "uapi/drm/vc4_drm.h"
 #include "vc4_drv.h"
 #include "vc4_regs.h"
 
@@ -73,6 +74,8 @@ static const struct file_operations vc4_drm_fops = {
 };
 
 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
+        DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, 0),
+        DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, 0),
 };
 
 static struct drm_driver vc4_drm_driver = {
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 39a1ff5c8f28..fddb0a06ed3a 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -155,6 +155,10 @@ int vc4_dumb_create(struct drm_file *file_priv,
                     struct drm_mode_create_dumb *args);
 struct dma_buf *vc4_prime_export(struct drm_device *dev,
                                  struct drm_gem_object *obj, int flags);
+int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
+                        struct drm_file *file_priv);
+int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
+                      struct drm_file *file_priv);
 void vc4_bo_cache_init(struct drm_device *dev);
 void vc4_bo_cache_destroy(struct drm_device *dev);
 int vc4_bo_stats_debugfs(struct seq_file *m, void *arg);
diff --git a/include/uapi/drm/Kbuild b/include/uapi/drm/Kbuild
index 38d437096c35..974fcd54e36f 100644
--- a/include/uapi/drm/Kbuild
+++ b/include/uapi/drm/Kbuild
@@ -17,4 +17,5 @@ header-y += tegra_drm.h
 header-y += via_drm.h
 header-y += vmwgfx_drm.h
 header-y += msm_drm.h
+header-y += vc4_drm.h
 header-y += virtgpu_drm.h
diff --git a/include/uapi/drm/vc4_drm.h b/include/uapi/drm/vc4_drm.h
new file mode 100644
index 000000000000..219d34c42272
--- /dev/null
+++ b/include/uapi/drm/vc4_drm.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright © 2014-2015 Broadcom
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifndef _UAPI_VC4_DRM_H_
+#define _UAPI_VC4_DRM_H_
+
+#include "drm.h"
+
+#define DRM_VC4_CREATE_BO                         0x03
+#define DRM_VC4_MMAP_BO                           0x04
+
+#define DRM_IOCTL_VC4_CREATE_BO           DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_CREATE_BO, struct drm_vc4_create_bo)
+#define DRM_IOCTL_VC4_MMAP_BO             DRM_IOWR(DRM_COMMAND_BASE + DRM_VC4_MMAP_BO, struct drm_vc4_mmap_bo)
+
+/**
+ * struct drm_vc4_create_bo - ioctl argument for creating VC4 BOs.
+ *
+ * There are currently no values for the flags argument, but it may be
+ * used in a future extension.
+ */
+struct drm_vc4_create_bo {
+        __u32 size;
+        __u32 flags;
+        /** Returned GEM handle for the BO. */
+        __u32 handle;
+        __u32 pad;
+};
+
+/**
+ * struct drm_vc4_mmap_bo - ioctl argument for mapping VC4 BOs.
+ *
+ * This doesn't actually perform an mmap.  Instead, it returns the
+ * offset you need to use in an mmap on the DRM device node.  This
+ * means that tools like valgrind end up knowing about the mapped
+ * memory.
+ *
+ * There are currently no values for the flags argument, but it may be
+ * used in a future extension.
+ */
+struct drm_vc4_mmap_bo {
+        /** Handle for the object being mapped. */
+        __u32 handle;
+        __u32 flags;
+        /** offset into the drm node to use for subsequent mmap call. */
+        __u64 offset;
+};
+
+#endif /* _UAPI_VC4_DRM_H_ */