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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "hwc-nv-importer"
#include "drmresources.h"
#include "importer.h"
#include "nvimporter.h"
#include <stdatomic.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <cutils/log.h>
#include <hardware/gralloc.h>
namespace android {
#ifdef USE_NVIDIA_IMPORTER
// static
Importer *Importer::CreateInstance(DrmResources *drm) {
NvImporter *importer = new NvImporter(drm);
if (!importer)
return NULL;
int ret = importer->Init();
if (ret) {
ALOGE("Failed to initialize the nv importer %d", ret);
delete importer;
return NULL;
}
return importer;
}
#endif
NvImporter::NvImporter(DrmResources *drm) : drm_(drm) {
}
NvImporter::~NvImporter() {
}
int NvImporter::Init() {
int ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
(const hw_module_t **)&gralloc_);
if (ret) {
ALOGE("Failed to open gralloc module %d", ret);
return ret;
}
if (strcasecmp(gralloc_->common.author, "NVIDIA"))
ALOGW("Using non-NVIDIA gralloc module: %s/%s\n", gralloc_->common.name,
gralloc_->common.author);
return 0;
}
int NvImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
memset(bo, 0, sizeof(hwc_drm_bo_t));
NvBuffer_t *buf = GrallocGetNvBuffer(handle);
if (buf) {
atomic_fetch_add(&buf->ref, 1);
*bo = buf->bo;
return 0;
}
buf = new NvBuffer_t();
if (!buf) {
ALOGE("Failed to allocate new NvBuffer_t");
return -ENOMEM;
}
buf->bo.priv = buf;
buf->importer = this;
// We initialize the reference count to 2 since NvGralloc is still using this
// buffer (will be cleared in the NvGrallocRelease), and the other
// reference is for HWC (this ImportBuffer call).
atomic_init(&buf->ref, 2);
int ret = gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_DRM_IMPORT,
drm_->fd(), handle, &buf->bo);
if (ret) {
ALOGE("GRALLOC_MODULE_PERFORM_DRM_IMPORT failed %d", ret);
delete buf;
return ret;
}
ret = drmModeAddFB2(drm_->fd(), buf->bo.width, buf->bo.height, buf->bo.format,
buf->bo.gem_handles, buf->bo.pitches, buf->bo.offsets,
&buf->bo.fb_id, 0);
if (ret) {
ALOGE("Failed to add fb %d", ret);
ReleaseBufferImpl(&buf->bo);
delete buf;
return ret;
}
ret = GrallocSetNvBuffer(handle, buf);
if (ret) {
/* This will happen is persist.tegra.gpu_mapping_cache is 0/off,
* or if NV gralloc runs out of "priv slots" (currently 3 per buffer,
* only one of which should be used by drm_hwcomposer). */
ALOGE("Failed to register free callback for imported buffer %d", ret);
ReleaseBufferImpl(&buf->bo);
delete buf;
return ret;
}
*bo = buf->bo;
return 0;
}
int NvImporter::ReleaseBuffer(hwc_drm_bo_t * bo) {
NvBuffer_t *buf = (NvBuffer_t *)bo->priv;
if (!buf) {
ALOGE("Freeing bo %ld, buf is NULL!", bo->fb_id);
return 0;
}
if (atomic_fetch_sub(&buf->ref, 1) > 1)
return 0;
ReleaseBufferImpl(bo);
delete buf;
return 0;
}
// static
void NvImporter::NvGrallocRelease(void *nv_buffer) {
NvBuffer_t *buf = (NvBuffer *)nv_buffer;
buf->importer->ReleaseBuffer(&buf->bo);
}
void NvImporter::ReleaseBufferImpl(hwc_drm_bo_t *bo) {
if (bo->fb_id) {
int ret = drmModeRmFB(drm_->fd(), bo->fb_id);
if (ret)
ALOGE("Failed to rm fb %d", ret);
}
struct drm_gem_close gem_close;
memset(&gem_close, 0, sizeof(gem_close));
int num_gem_handles = sizeof(bo->gem_handles) / sizeof(bo->gem_handles[0]);
for (int i = 0; i < num_gem_handles; i++) {
if (!bo->gem_handles[i])
continue;
gem_close.handle = bo->gem_handles[i];
int ret = drmIoctl(drm_->fd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
if (ret)
ALOGE("Failed to close gem handle %d %d", i, ret);
else
bo->gem_handles[i] = 0;
}
}
NvImporter::NvBuffer_t *NvImporter::GrallocGetNvBuffer(buffer_handle_t handle) {
void *priv = NULL;
int ret =
gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_GET_IMPORTER_PRIVATE,
handle, NvGrallocRelease, &priv);
return ret ? NULL : (NvBuffer_t *)priv;
}
int NvImporter::GrallocSetNvBuffer(buffer_handle_t handle, NvBuffer_t *buf) {
return gralloc_->perform(gralloc_,
GRALLOC_MODULE_PERFORM_SET_IMPORTER_PRIVATE, handle,
NvGrallocRelease, buf);
}
}
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