/*
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* Copyright 2017 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "cros_gralloc_buffer.h"
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#include <assert.h>
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#include <sys/mman.h>
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cros_gralloc_buffer::cros_gralloc_buffer(uint32_t id, struct bo *acquire_bo,
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struct cros_gralloc_handle *acquire_handle)
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: id_(id), bo_(acquire_bo), hnd_(acquire_handle), refcount_(1), lockcount_(0)
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{
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assert(bo_);
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num_planes_ = drv_bo_get_num_planes(bo_);
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for (uint32_t plane = 0; plane < num_planes_; plane++)
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lock_data_[plane] = nullptr;
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}
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cros_gralloc_buffer::~cros_gralloc_buffer()
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{
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drv_bo_destroy(bo_);
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if (hnd_) {
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native_handle_close(&hnd_->base);
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delete hnd_;
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}
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}
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uint32_t cros_gralloc_buffer::get_id() const
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{
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return id_;
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}
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int32_t cros_gralloc_buffer::increase_refcount()
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{
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return ++refcount_;
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}
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int32_t cros_gralloc_buffer::decrease_refcount()
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{
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assert(refcount_ > 0);
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return --refcount_;
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}
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int32_t cros_gralloc_buffer::lock(const struct rectangle *rect, uint32_t map_flags,
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uint8_t *addr[DRV_MAX_PLANES])
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{
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void *vaddr = nullptr;
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memset(addr, 0, DRV_MAX_PLANES * sizeof(*addr));
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/*
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* Gralloc consumers don't support more than one kernel buffer per buffer object yet, so
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* just use the first kernel buffer.
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*/
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if (drv_num_buffers_per_bo(bo_) != 1) {
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drv_log("Can only support one buffer per bo.\n");
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return -EINVAL;
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}
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if (map_flags) {
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if (lock_data_[0]) {
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drv_bo_invalidate(bo_, lock_data_[0]);
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vaddr = lock_data_[0]->vma->addr;
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} else {
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vaddr = drv_bo_map(bo_, rect, map_flags, &lock_data_[0], 0);
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}
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if (vaddr == MAP_FAILED) {
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drv_log("Mapping failed.\n");
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return -EFAULT;
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}
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}
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for (uint32_t plane = 0; plane < num_planes_; plane++)
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addr[plane] = static_cast<uint8_t *>(vaddr) + drv_bo_get_plane_offset(bo_, plane);
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lockcount_++;
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return 0;
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}
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int32_t cros_gralloc_buffer::unlock()
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{
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if (lockcount_ <= 0) {
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drv_log("Buffer was not locked.\n");
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return -EINVAL;
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}
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if (!--lockcount_) {
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if (lock_data_[0]) {
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drv_bo_flush_or_unmap(bo_, lock_data_[0]);
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lock_data_[0] = nullptr;
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}
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}
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return 0;
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}
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