2 * Copyright (C) 2015 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #define LOG_TAG "hwc-nv-importer"
19 #include "drmresources.h"
21 #include "nvimporter.h"
24 #include <stdatomic.h>
26 #include <xf86drmMode.h>
28 #include <cutils/log.h>
29 #include <hardware/gralloc.h>
33 #ifdef USE_NVIDIA_IMPORTER
35 Importer *Importer::CreateInstance(DrmResources *drm) {
36 NvImporter *importer = new NvImporter(drm);
40 int ret = importer->Init();
42 ALOGE("Failed to initialize the nv importer %d", ret);
50 NvImporter::NvImporter(DrmResources *drm) : drm_(drm) {
53 NvImporter::~NvImporter() {
56 int NvImporter::Init() {
57 int ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
58 (const hw_module_t **)&gralloc_);
60 ALOGE("Failed to open gralloc module %d", ret);
64 if (strcasecmp(gralloc_->common.author, "NVIDIA"))
65 ALOGW("Using non-NVIDIA gralloc module: %s/%s\n", gralloc_->common.name,
66 gralloc_->common.author);
71 int NvImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
72 memset(bo, 0, sizeof(hwc_drm_bo_t));
73 NvBuffer_t *buf = GrallocGetNvBuffer(handle);
75 atomic_fetch_add(&buf->ref, 1);
80 buf = new NvBuffer_t();
82 ALOGE("Failed to allocate new NvBuffer_t");
88 // We initialize the reference count to 2 since NvGralloc is still using this
89 // buffer (will be cleared in the NvGrallocRelease), and the other
90 // reference is for HWC (this ImportBuffer call).
91 atomic_init(&buf->ref, 2);
93 int ret = gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_DRM_IMPORT,
94 drm_->fd(), handle, &buf->bo);
96 ALOGE("GRALLOC_MODULE_PERFORM_DRM_IMPORT failed %d", ret);
101 ret = drmModeAddFB2(drm_->fd(), buf->bo.width, buf->bo.height, buf->bo.format,
102 buf->bo.gem_handles, buf->bo.pitches, buf->bo.offsets,
105 ALOGE("Failed to add fb %d", ret);
106 ReleaseBufferImpl(&buf->bo);
111 ret = GrallocSetNvBuffer(handle, buf);
113 /* This will happen is persist.tegra.gpu_mapping_cache is 0/off,
114 * or if NV gralloc runs out of "priv slots" (currently 3 per buffer,
115 * only one of which should be used by drm_hwcomposer). */
116 ALOGE("Failed to register free callback for imported buffer %d", ret);
117 ReleaseBufferImpl(&buf->bo);
125 int NvImporter::ReleaseBuffer(hwc_drm_bo_t *bo) {
126 NvBuffer_t *buf = (NvBuffer_t *)bo->priv;
128 ALOGE("Freeing bo %" PRIu32 ", buf is NULL!", bo->fb_id);
131 if (atomic_fetch_sub(&buf->ref, 1) > 1)
134 ReleaseBufferImpl(bo);
140 void NvImporter::NvGrallocRelease(void *nv_buffer) {
141 NvBuffer_t *buf = (NvBuffer *)nv_buffer;
142 buf->importer->ReleaseBuffer(&buf->bo);
145 void NvImporter::ReleaseBufferImpl(hwc_drm_bo_t *bo) {
147 int ret = drmModeRmFB(drm_->fd(), bo->fb_id);
149 ALOGE("Failed to rm fb %d", ret);
152 struct drm_gem_close gem_close;
153 memset(&gem_close, 0, sizeof(gem_close));
154 int num_gem_handles = sizeof(bo->gem_handles) / sizeof(bo->gem_handles[0]);
155 for (int i = 0; i < num_gem_handles; i++) {
156 if (!bo->gem_handles[i])
159 gem_close.handle = bo->gem_handles[i];
160 int ret = drmIoctl(drm_->fd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
162 ALOGE("Failed to close gem handle %d %d", i, ret);
164 /* Clear any duplicate gem handle as well but don't close again */
165 for (int j = i + 1; j < num_gem_handles; j++)
166 if (bo->gem_handles[j] == bo->gem_handles[i])
167 bo->gem_handles[j] = 0;
168 bo->gem_handles[i] = 0;
173 NvImporter::NvBuffer_t *NvImporter::GrallocGetNvBuffer(buffer_handle_t handle) {
176 gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_GET_IMPORTER_PRIVATE,
177 handle, NvGrallocRelease, &priv);
178 return ret ? NULL : (NvBuffer_t *)priv;
181 int NvImporter::GrallocSetNvBuffer(buffer_handle_t handle, NvBuffer_t *buf) {
182 return gralloc_->perform(gralloc_,
183 GRALLOC_MODULE_PERFORM_SET_IMPORTER_PRIVATE, handle,
184 NvGrallocRelease, buf);