Index: ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.cc |
diff --git a/ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.cc b/ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1b7cf1cc64681a2e1bd86a1120b7268cbf33ad77 |
--- /dev/null |
+++ b/ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.cc |
@@ -0,0 +1,89 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.h" |
+ |
+#include <fcntl.h> |
+#include <sys/mman.h> |
+#include <vgem_drm.h> |
+#include <xf86drm.h> |
+ |
+#include "base/process/memory.h" |
+#include "base/trace_event/trace_event.h" |
+ |
+namespace ui { |
+ |
+// static |
+scoped_ptr<ClientNativePixmap> ClientNativePixmapVgem::ImportFromDmabuf( |
+ int vgem_fd, |
+ int dmabuf_fd, |
+ const gfx::Size& size, |
+ int stride) { |
+ DCHECK_GE(vgem_fd, 0); |
+ DCHECK_GE(dmabuf_fd, 0); |
+ uint32_t vgem_bo_handle = 0; |
+ int ret = drmPrimeFDToHandle(vgem_fd, dmabuf_fd, &vgem_bo_handle); |
+ DCHECK(!ret) << "drmPrimeFDToHandle failed."; |
+ return make_scoped_ptr( |
+ new ClientNativePixmapVgem(vgem_fd, vgem_bo_handle, size, stride)); |
+} |
+ |
+ClientNativePixmapVgem::ClientNativePixmapVgem(int vgem_fd, |
+ uint32_t vgem_bo_handle, |
+ const gfx::Size& size, |
+ int stride) |
+ : vgem_fd_(vgem_fd), |
+ vgem_bo_handle_(vgem_bo_handle), |
+ size_(size), |
+ stride_(stride), |
+ data_(nullptr) { |
+ DCHECK(vgem_bo_handle_); |
+} |
+ |
+ClientNativePixmapVgem::~ClientNativePixmapVgem() { |
+ DCHECK(!data_); |
+ struct drm_gem_close close = {0}; |
+ close.handle = vgem_bo_handle_; |
+ int ret = drmIoctl(vgem_fd_, DRM_IOCTL_GEM_CLOSE, &close); |
+ DCHECK(!ret) << "fail to free a vgem buffer."; |
+} |
+ |
+bool ClientNativePixmapVgem::Map(void** data) { |
+ TRACE_EVENT0("gpu", "ClientNativePixmapVgem::Map"); |
+ DCHECK(!data_); |
+ struct drm_mode_map_dumb mmap_arg = {0}; |
+ mmap_arg.handle = vgem_bo_handle_; |
+ |
+ size_t size = stride_ * size_.height(); |
+ int ret = drmIoctl(vgem_fd_, DRM_IOCTL_VGEM_MODE_MAP_DUMB, &mmap_arg); |
+ if (ret) { |
+ PLOG(ERROR) << "fail to map a vgem buffer."; |
+ base::TerminateBecauseOutOfMemory(size); |
+ return false; |
reveman
2015/08/13 17:16:43
nit: no need to return false here. TerminateBecaus
|
+ } |
+ DCHECK(mmap_arg.offset); |
+ |
+ data_ = mmap(nullptr, size, (PROT_READ | PROT_WRITE), MAP_SHARED, vgem_fd_, |
+ mmap_arg.offset); |
+ DCHECK_NE(data_, MAP_FAILED); |
+ *data = data_; |
+ return true; |
+} |
+ |
+void ClientNativePixmapVgem::Unmap() { |
+ TRACE_EVENT0("gpu", "ClientNativePixmapVgem::Unmap"); |
+ DCHECK(data_); |
+ |
+ // TODO(dshwang): keep it consistently mapped, and unmap it in dtor. |
+ size_t size = stride_ * size_.height(); |
+ int ret = munmap(data_, size); |
+ DCHECK(!ret) << "fail to munmap a vgem buffer."; |
+ data_ = nullptr; |
+} |
+ |
+void ClientNativePixmapVgem::GetStride(int* stride) const { |
+ *stride = stride_; |
+} |
+ |
+} // namespace ui |