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/*
* Copyright (C) 2021 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.
*/
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define LOG_TAG "hwc-platform-drm-generic"
#include "DrmFbImporter.h"
#include <hardware/gralloc.h>
#include <utils/Trace.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <cinttypes>
#include <system_error>
#include "utils/log.h"
#include "utils/properties.h"
namespace android {
auto DrmFbIdHandle::CreateInstance(BufferInfo *bo, GemHandle first_gem_handle,
DrmDevice &drm)
-> std::shared_ptr<DrmFbIdHandle> {
// NOLINTNEXTLINE(misc-const-correctness)
ATRACE_NAME("Import dmabufs and register FB");
// NOLINTNEXTLINE(cppcoreguidelines-owning-memory): priv. constructor usage
std::shared_ptr<DrmFbIdHandle> local(new DrmFbIdHandle(drm));
local->gem_handles_[0] = first_gem_handle;
int32_t err = 0;
/* Framebuffer object creation require gem handle for every used plane */
for (size_t i = 1; i < local->gem_handles_.size(); i++) {
if (bo->prime_fds[i] > 0) {
if (bo->prime_fds[i] != bo->prime_fds[0]) {
err = drmPrimeFDToHandle(*drm.GetFd(), bo->prime_fds[i],
&local->gem_handles_.at(i));
if (err != 0) {
ALOGE("failed to import prime fd %d errno=%d", bo->prime_fds[i],
errno);
}
} else {
local->gem_handles_.at(i) = local->gem_handles_[0];
}
}
}
auto has_modifiers = bo->modifiers[0] != DRM_FORMAT_MOD_NONE &&
bo->modifiers[0] != DRM_FORMAT_MOD_INVALID;
if (!drm.HasAddFb2ModifiersSupport() && has_modifiers) {
ALOGE("No ADDFB2 with modifier support. Can't import modifier %" PRIu64,
bo->modifiers[0]);
local.reset();
return local;
}
/* Create framebuffer object */
if (!has_modifiers) {
err = drmModeAddFB2(*drm.GetFd(), bo->width, bo->height, bo->format,
local->gem_handles_.data(), &bo->pitches[0],
&bo->offsets[0], &local->fb_id_, 0);
} else {
err = drmModeAddFB2WithModifiers(*drm.GetFd(), bo->width, bo->height,
bo->format, local->gem_handles_.data(),
&bo->pitches[0], &bo->offsets[0],
&bo->modifiers[0], &local->fb_id_,
DRM_MODE_FB_MODIFIERS);
}
if (err != 0) {
ALOGE("could not create drm fb %d", err);
local.reset();
}
return local;
}
DrmFbIdHandle::~DrmFbIdHandle() {
// NOLINTNEXTLINE(misc-const-correctness)
ATRACE_NAME("Close FB and dmabufs");
/* Destroy framebuffer object */
if (drmModeRmFB(*drm_->GetFd(), fb_id_) != 0) {
ALOGE("Failed to rm fb");
}
/* Close GEM handles.
*
* WARNING: TODO(nobody):
* From Linux side libweston relies on libgbm to get KMS handle and never
* closes it (handle is closed by libgbm on buffer destruction)
* Probably we should offer similar approach to users (at least on user
* request via system properties)
*/
struct drm_gem_close gem_close {};
for (size_t i = 0; i < gem_handles_.size(); i++) {
/* Don't close invalid handle. Close handle only once in cases
* where several YUV planes located in the single buffer. */
if (gem_handles_[i] == 0 ||
(i != 0 && gem_handles_[i] == gem_handles_[0])) {
continue;
}
gem_close.handle = gem_handles_[i];
auto err = drmIoctl(*drm_->GetFd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
if (err != 0) {
ALOGE("Failed to close gem handle %d, errno: %d", gem_handles_[i], errno);
}
}
}
auto DrmFbImporter::GetOrCreateFbId(BufferInfo *bo)
-> std::shared_ptr<DrmFbIdHandle> {
/* Lookup DrmFbIdHandle in cache first. First handle serves as a cache key. */
GemHandle first_handle = 0;
auto err = drmPrimeFDToHandle(*drm_->GetFd(), bo->prime_fds[0],
&first_handle);
if (err != 0) {
ALOGE("Failed to import prime fd %d ret=%d", bo->prime_fds[0], err);
return {};
}
auto drm_fb_id_cached = drm_fb_id_handle_cache_.find(first_handle);
if (drm_fb_id_cached != drm_fb_id_handle_cache_.end()) {
if (auto drm_fb_id_handle_shared = drm_fb_id_cached->second.lock()) {
return drm_fb_id_handle_shared;
}
drm_fb_id_handle_cache_.erase(drm_fb_id_cached);
}
/* Cleanup cached empty weak pointers */
const int minimal_cleanup_size = 128;
if (drm_fb_id_handle_cache_.size() > minimal_cleanup_size) {
CleanupEmptyCacheElements();
}
/* No DrmFbIdHandle found in cache, create framebuffer object */
auto fb_id_handle = DrmFbIdHandle::CreateInstance(bo, first_handle, *drm_);
if (fb_id_handle) {
drm_fb_id_handle_cache_[first_handle] = fb_id_handle;
}
return fb_id_handle;
}
} // namespace android
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