v3dv: create a v3dv_bo struct and reference it from v3dv_device_memory

So we have a lower level representation of a buffer object that we can
manipulate that is not tied to a Vulkan representation of memory. This
will be useful as we start allocating driver internal buffers, such as
command lists.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>

1 files changed, 145 insertions, 0 deletions

diff --git a/src/broadcom/vulkan/v3dv_bo.c b/src/broadcom/vulkan/v3dv_bo.c
new file mode 100644
index 00000000000..95e56950231
--- /dev/null
+++ b/src/broadcom/vulkan/v3dv_bo.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright © 2019 Raspberry Pi
+ *
+ * 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.
+ */
+
+#include "v3dv_private.h"
+
+#include <errno.h>
+#include <sys/mman.h>
+
+#include "drm-uapi/v3d_drm.h"
+
+bool
+v3dv_bo_alloc(struct v3dv_device *device, uint32_t size, struct v3dv_bo *bo)
+{
+   const uint32_t page_align = 4096; /* Always allocate full pages */
+   size = align(size, page_align);
+   struct drm_v3d_create_bo create = {
+      .size = size
+   };
+
+   int ret = v3dv_ioctl(device->fd, DRM_IOCTL_V3D_CREATE_BO, &create);
+   if (ret != 0)
+      return false;
+
+   assert(create.offset % page_align == 0);
+   assert((create.offset & 0xffffffff) == create.offset);
+
+   bo->handle = create.handle;
+   bo->size = size;
+   bo->offset = create.offset;
+   bo->map = NULL;
+   bo->map_size = 0;
+
+   return true;
+}
+
+bool
+v3dv_bo_free(struct v3dv_device *device, struct v3dv_bo *bo)
+{
+   assert(bo);
+
+   if (bo->map)
+      v3dv_bo_unmap(device, bo);
+
+   struct drm_gem_close c;
+   memset(&c, 0, sizeof(c));
+   c.handle = bo->handle;
+   int ret = v3dv_ioctl(device->fd, DRM_IOCTL_GEM_CLOSE, &c);
+   if (ret != 0)
+      fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
+
+   return ret == 0;
+}
+
+bool
+v3dv_bo_map_unsynchronized(struct v3dv_device *device,
+                           struct v3dv_bo *bo,
+                           uint32_t size)
+{
+   assert(bo != NULL && size <= bo->size);
+
+   struct drm_v3d_mmap_bo map;
+   memset(&map, 0, sizeof(map));
+   map.handle = bo->handle;
+   int ret = v3dv_ioctl(device->fd, DRM_IOCTL_V3D_MMAP_BO, &map);
+   if (ret != 0) {
+      fprintf(stderr, "map ioctl failure\n");
+      return false;
+   }
+
+   bo->map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
+                  device->fd, map.offset);
+   if (bo->map == MAP_FAILED) {
+      fprintf(stderr, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
+              bo->handle, (long long)map.offset, (uint32_t)bo->size);
+      return false;
+   }
+   VG(VALGRIND_MALLOCLIKE_BLOCK(bo->map, bo->size, 0, false));
+
+   bo->map_size = size;
+
+   return true;
+}
+
+bool
+v3dv_bo_wait(struct v3dv_device *device,
+             struct v3dv_bo *bo,
+             uint64_t timeout_ns)
+{
+   struct drm_v3d_wait_bo wait = {
+      .handle = bo->handle,
+      .timeout_ns = timeout_ns,
+   };
+   return v3dv_ioctl(device->fd, DRM_IOCTL_V3D_WAIT_BO, &wait) == 0;
+}
+
+bool
+v3dv_bo_map(struct v3dv_device *device, struct v3dv_bo *bo, uint32_t size)
+{
+   assert(bo && size <= bo->size);
+
+   bool ok = v3dv_bo_map_unsynchronized(device, bo, size);
+   if (!ok)
+      return false;
+
+   const uint64_t infinite = 0xffffffffffffffffull;
+   ok = v3dv_bo_wait(device, bo, infinite);
+   if (!ok) {
+      fprintf(stderr, "memory wait for map failed\n");
+      return false;
+   }
+
+   return true;
+}
+
+void
+v3dv_bo_unmap(struct v3dv_device *device, struct v3dv_bo *bo)
+{
+   assert(bo && bo->map && bo->map_size > 0);
+
+   munmap(bo->map, bo->map_size);
+   VG(VALGRIND_FREELIKE_BLOCK(bo->map, 0));
+   bo->map = NULL;
+   bo->map_size = 0;
+}
+