| /* |
| * Copyright 2017 The Chromium OS 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 "cros_gralloc_buffer.h" |
| |
| #include <assert.h> |
| #include <sys/mman.h> |
| |
| cros_gralloc_buffer::cros_gralloc_buffer(uint32_t id, struct bo *acquirebo_, |
| struct cros_gralloc_handle *acquire_handle) |
| : id_(id), bo_(acquirebo_), hnd_(acquire_handle), refcount_(1), lockcount_(0) |
| { |
| assert(bo_); |
| num_planes_ = drv_bo_get_num_planes(bo_); |
| for (uint32_t plane = 0; plane < num_planes_; plane++) |
| lock_data_[plane] = nullptr; |
| } |
| |
| cros_gralloc_buffer::~cros_gralloc_buffer() |
| { |
| drv_bo_destroy(bo_); |
| if (hnd_) { |
| native_handle_close(&hnd_->base); |
| delete hnd_; |
| } |
| } |
| |
| uint32_t cros_gralloc_buffer::get_id() const |
| { |
| return id_; |
| } |
| |
| int32_t cros_gralloc_buffer::increase_refcount() |
| { |
| return ++refcount_; |
| } |
| |
| int32_t cros_gralloc_buffer::decrease_refcount() |
| { |
| assert(refcount_ > 0); |
| return --refcount_; |
| } |
| |
| int32_t cros_gralloc_buffer::lock(uint64_t flags, uint8_t *addr[DRV_MAX_PLANES]) |
| { |
| void *vaddr = nullptr; |
| |
| memset(addr, 0, DRV_MAX_PLANES * sizeof(*addr)); |
| |
| /* |
| * Gralloc consumers don't support more than one kernel buffer per buffer object yet, so |
| * just use the first kernel buffer. |
| */ |
| if (drv_num_buffers_per_bo(bo_) != 1) { |
| cros_gralloc_error("Can only support one buffer per bo."); |
| return -EINVAL; |
| } |
| |
| if (flags) { |
| if (lock_data_[0]) { |
| vaddr = lock_data_[0]->addr; |
| } else { |
| vaddr = drv_bo_map(bo_, 0, 0, drv_bo_get_width(bo_), drv_bo_get_height(bo_), |
| BO_TRANSFER_READ_WRITE, &lock_data_[0], 0); |
| } |
| |
| if (vaddr == MAP_FAILED) { |
| cros_gralloc_error("Mapping failed."); |
| return -EFAULT; |
| } |
| } |
| |
| for (uint32_t plane = 0; plane < num_planes_; plane++) |
| addr[plane] = static_cast<uint8_t *>(vaddr) + drv_bo_get_plane_offset(bo_, plane); |
| |
| lockcount_++; |
| return 0; |
| } |
| |
| int32_t cros_gralloc_buffer::unlock() |
| { |
| if (lockcount_ <= 0) { |
| cros_gralloc_error("Buffer was not locked."); |
| return -EINVAL; |
| } |
| |
| if (!--lockcount_) { |
| if (lock_data_[0]) { |
| drv_bo_unmap(bo_, lock_data_[0]); |
| lock_data_[0] = nullptr; |
| } |
| } |
| |
| return 0; |
| } |