Integrate from //sandbox/mathias/donut/...@145728
SurfaceFlinger rework for new EGL driver model support.
This commit is contained in:
Mathias Agopian
320
modules/gralloc/gralloc.cpp
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320
modules/gralloc/gralloc.cpp
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <limits.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <cutils/ashmem.h>
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#include <cutils/log.h>
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#include <hardware/hardware.h>
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#include <hardware/gralloc.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <pthread.h>
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#include <cutils/log.h>
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#include <cutils/atomic.h>
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#include "gralloc_priv.h"
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/*****************************************************************************/
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struct gralloc_context_t {
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alloc_device_t device;
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/* our private data here */
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};
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static int gralloc_alloc_buffer(alloc_device_t* dev,
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size_t size, int usage, buffer_handle_t* pHandle);
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/*****************************************************************************/
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int fb_device_open(const hw_module_t* module, const char* name,
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hw_device_t** device);
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static int gralloc_device_open(const hw_module_t* module, const char* name,
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hw_device_t** device);
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extern int gralloc_map(gralloc_module_t const* module,
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buffer_handle_t handle, void** vaddr);
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extern int gralloc_unmap(gralloc_module_t const* module,
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buffer_handle_t handle);
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extern int gralloc_lock(gralloc_module_t const* module,
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buffer_handle_t handle, int usage,
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int l, int t, int w, int h);
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extern int gralloc_unlock(gralloc_module_t const* module,
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buffer_handle_t handle);
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/*****************************************************************************/
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static struct hw_module_methods_t gralloc_module_methods = {
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open: gralloc_device_open
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};
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struct private_module_t HAL_MODULE_INFO_SYM = {
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base: {
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common: {
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tag: HARDWARE_MODULE_TAG,
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version_major: 1,
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version_minor: 0,
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id: GRALLOC_HARDWARE_MODULE_ID,
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name: "Graphics Memory Allocator Module",
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author: "The Android Open Source Project",
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methods: &gralloc_module_methods
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},
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map: gralloc_map,
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unmap: gralloc_unmap,
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lock: gralloc_lock,
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unlock: gralloc_unlock,
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},
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framebuffer: 0,
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flags: 0,
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numBuffers: 0,
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bufferMask: 0,
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lock: PTHREAD_MUTEX_INITIALIZER,
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currentBuffer: 0
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};
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/*****************************************************************************/
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/*
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* This function creates a buffer_handle_t initialized with the given fd.
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* the offset passed in parameter is used to mmap() this fd later at this
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* offset.
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*/
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static int gralloc_alloc_framebuffer_locked(alloc_device_t* dev,
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size_t size, int usage, buffer_handle_t* pHandle)
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{
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private_module_t* m = reinterpret_cast<private_module_t*>(
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dev->common.module);
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// allocate the framebuffer
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if (m->framebuffer == NULL) {
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// initialize the framebuffer
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int err = mapFrameBufferLocked(m);
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if (err < 0) {
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return err;
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}
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}
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if (m->framebuffer->base == 0) {
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void *vaddr;
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m->base.map(&m->base, m->framebuffer, &vaddr);
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}
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const uint32_t bufferMask = m->bufferMask;
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const uint32_t numBuffers = m->numBuffers;
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const size_t bufferSize = m->finfo.line_length * m->info.yres;
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if (numBuffers == 1) {
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// If we have only one buffer, we never use page-flipping. Instead,
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// we return a regular buffer which will be memcpy'ed to the main
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// screen when post is called.
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int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
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return gralloc_alloc_buffer(dev, bufferSize, newUsage, pHandle);
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}
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if (bufferMask >= ((1LU<<numBuffers)-1)) {
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// We ran out of buffers.
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return -ENOMEM;
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}
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// create a "fake" handles for it
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intptr_t vaddr = intptr_t(m->framebuffer->base);
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private_handle_t* hnd = new private_handle_t(dup(m->framebuffer->fd), size,
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private_handle_t::PRIV_FLAGS_USES_PMEM |
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private_handle_t::PRIV_FLAGS_FRAMEBUFFER);
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// find a free slot
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for (uint32_t i=0 ; i<numBuffers ; i++) {
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if ((bufferMask & (1LU<<i)) == 0) {
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m->bufferMask |= (1LU<<i);
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break;
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}
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vaddr += bufferSize;
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}
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hnd->base = vaddr;
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*pHandle = hnd;
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return 0;
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}
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static int gralloc_alloc_framebuffer(alloc_device_t* dev,
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size_t size, int usage, buffer_handle_t* pHandle)
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{
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private_module_t* m = reinterpret_cast<private_module_t*>(
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dev->common.module);
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pthread_mutex_lock(&m->lock);
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int err = gralloc_alloc_framebuffer_locked(dev, size, usage, pHandle);
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pthread_mutex_unlock(&m->lock);
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return err;
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}
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static int gralloc_alloc_buffer(alloc_device_t* dev,
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size_t size, int usage, buffer_handle_t* pHandle)
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{
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size = roundUpToPageSize(size);
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int flags = 0;
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if (usage & GRALLOC_USAGE_HW_2D) {
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flags |= private_handle_t::PRIV_FLAGS_USES_PMEM;
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}
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int fd;
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if ((flags & private_handle_t::PRIV_FLAGS_USES_PMEM) == 0) {
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fd = ashmem_create_region("Buffer", size);
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} else {
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fd = open("/dev/pmem", O_RDWR, 0);
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// Note: Currently pmem get sized when it is mmaped.
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// This means that just doing the open doesn't actually allocate
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// anything. We basically need to do an implicit "mmap"
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// (under the hood) for pmem regions. However, the current
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// code will work okay for now thanks to the reference-counting.
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}
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if (fd < 0) {
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return -errno;
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}
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private_handle_t* hnd = new private_handle_t(fd, size, flags);
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*pHandle = hnd;
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return 0;
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}
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/*****************************************************************************/
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static int gralloc_alloc(alloc_device_t* dev,
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int w, int h, int format, int usage,
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buffer_handle_t* pHandle, int* pStride)
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{
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if (!pHandle || !pStride)
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return -EINVAL;
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int align = 4;
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int bpp = 0;
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switch (format) {
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case HAL_PIXEL_FORMAT_RGBA_8888:
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case HAL_PIXEL_FORMAT_BGRA_8888:
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bpp = 4;
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break;
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case HAL_PIXEL_FORMAT_RGB_565:
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case HAL_PIXEL_FORMAT_RGBA_5551:
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case HAL_PIXEL_FORMAT_RGBA_4444:
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bpp = 2;
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break;
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default:
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return -EINVAL;
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}
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size_t bpr = (w*bpp + (align-1)) & ~(align-1);
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size_t size = bpr * h;
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size_t stride = bpr / bpp;
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int err;
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if (usage & GRALLOC_USAGE_HW_FB) {
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err = gralloc_alloc_framebuffer(dev, size, usage, pHandle);
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} else {
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err = gralloc_alloc_buffer(dev, size, usage, pHandle);
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}
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if (err < 0) {
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return err;
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}
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*pStride = stride;
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return 0;
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}
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static int gralloc_free(alloc_device_t* dev,
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buffer_handle_t handle)
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{
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if (private_handle_t::validate(handle) < 0)
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return -EINVAL;
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private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(handle);
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if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
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// free this buffer
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private_module_t* m = reinterpret_cast<private_module_t*>(
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dev->common.module);
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const size_t bufferSize = m->finfo.line_length * m->info.yres;
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int index = (hnd->base - m->framebuffer->base) / bufferSize;
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m->bufferMask &= ~(1<<index);
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}
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if (hnd->base) {
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LOGW("Freeing mapped handle %p", hnd);
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gralloc_unmap((gralloc_module_t*) dev->common.module, handle);
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}
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close(hnd->fd);
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delete hnd;
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return 0;
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}
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/*****************************************************************************/
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static int gralloc_close(struct hw_device_t *dev)
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{
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gralloc_context_t* ctx = reinterpret_cast<gralloc_context_t*>(dev);
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if (ctx) {
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/* TODO: keep a list of all buffer_handle_t created, and free them
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* all here
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*/
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private_module_t* m = reinterpret_cast<private_module_t*>(dev->module);
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pthread_mutex_lock(&m->lock);
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if (m->framebuffer) {
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m->base.unmap(&m->base, m->framebuffer);
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}
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pthread_mutex_unlock(&m->lock);
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free(ctx);
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}
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return 0;
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}
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int gralloc_device_open(const hw_module_t* module, const char* name,
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hw_device_t** device)
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{
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int status = -EINVAL;
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if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) {
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gralloc_context_t *dev;
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dev = (gralloc_context_t*)malloc(sizeof(*dev));
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/* initialize our state here */
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memset(dev, 0, sizeof(*dev));
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/* initialize the procs */
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dev->device.common.tag = HARDWARE_DEVICE_TAG;
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dev->device.common.version = 0;
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dev->device.common.module = const_cast<hw_module_t*>(module);
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dev->device.common.close = gralloc_close;
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dev->device.alloc = gralloc_alloc;
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dev->device.free = gralloc_free;
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*device = &dev->device.common;
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status = 0;
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} else {
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status = fb_device_open(module, name, device);
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}
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return status;
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}
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