/*
* Copyright (C) 2010 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.
*/
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include "gr.h"
#include "gpu.h"
gpu_context_t::gpu_context_t(Deps& deps, PmemAllocator& pmemAllocator,
PmemAllocator& pmemAdspAllocator, const private_module_t* module) :
deps(deps),
pmemAllocator(pmemAllocator),
pmemAdspAllocator(pmemAdspAllocator)
{
// Zero out the alloc_device_t
memset(static_cast<alloc_device_t*>(this), 0, sizeof(alloc_device_t));
// Initialize the procs
common.tag = HARDWARE_DEVICE_TAG;
common.version = 0;
common.module = const_cast<hw_module_t*>(&module->base.common);
common.close = gralloc_close;
alloc = gralloc_alloc;
free = gralloc_free;
}
int gpu_context_t::gralloc_alloc_framebuffer_locked(size_t size, int usage,
buffer_handle_t* pHandle)
{
private_module_t* m = reinterpret_cast<private_module_t*>(common.module);
// we don't support allocations with both the FB and PMEM_ADSP flags
if (usage & GRALLOC_USAGE_PRIVATE_PMEM_ADSP) {
return -EINVAL;
}
// allocate the framebuffer
if (m->framebuffer == NULL) {
// initialize the framebuffer, the framebuffer is mapped once
// and forever.
int err = deps.mapFrameBufferLocked(m);
if (err < 0) {
return err;
}
}
const uint32_t bufferMask = m->bufferMask;
const uint32_t numBuffers = m->numBuffers;
const size_t bufferSize = m->finfo.line_length * m->info.yres;
if (numBuffers == 1) {
// If we have only one buffer, we never use page-flipping. Instead,
// we return a regular buffer which will be memcpy'ed to the main
// screen when post is called.
int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
return gralloc_alloc_buffer(bufferSize, newUsage, pHandle);
}
if (bufferMask >= ((1LU<<numBuffers)-1)) {
// We ran out of buffers.
return -ENOMEM;
}
// create a "fake" handles for it
intptr_t vaddr = intptr_t(m->framebuffer->base);
private_handle_t* hnd = new private_handle_t(dup(m->framebuffer->fd), size,
private_handle_t::PRIV_FLAGS_USES_PMEM |
private_handle_t::PRIV_FLAGS_FRAMEBUFFER);
// find a free slot
for (uint32_t i=0 ; i<numBuffers ; i++) {
if ((bufferMask & (1LU<<i)) == 0) {
m->bufferMask |= (1LU<<i);
break;
}
vaddr += bufferSize;
}
hnd->base = vaddr;
hnd->offset = vaddr - intptr_t(m->framebuffer->base);
*pHandle = hnd;
return 0;
}
int gpu_context_t::gralloc_alloc_framebuffer(size_t size, int usage,
buffer_handle_t* pHandle)
{
private_module_t* m = reinterpret_cast<private_module_t*>(common.module);
pthread_mutex_lock(&m->lock);
int err = gralloc_alloc_framebuffer_locked(size, usage, pHandle);
pthread_mutex_unlock(&m->lock);
return err;
}
int gpu_context_t::gralloc_alloc_buffer(size_t size, int usage, buffer_handle_t* pHandle)
{
int err = 0;
int flags = 0;
int fd = -1;
void* base = 0; // XXX JMG: This should change to just get an address from
// the PmemAllocator rather than getting the base & offset separately
int offset = 0;
int lockState = 0;
size = roundUpToPageSize(size);
if (usage & GRALLOC_USAGE_HW_TEXTURE) {
// enable pmem in that case, so our software GL can fallback to
// the copybit module.
flags |= private_handle_t::PRIV_FLAGS_USES_PMEM;
}
if (usage & GRALLOC_USAGE_HW_2D) {
flags |= private_handle_t::PRIV_FLAGS_USES_PMEM;
}
if (usage & GRALLOC_USAGE_PRIVATE_PMEM_ADSP) {
flags |= private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP;
flags &= ~private_handle_t::PRIV_FLAGS_USES_PMEM;
}
private_module_t* m = reinterpret_cast<private_module_t*>(common.module);
if ((flags & private_handle_t::PRIV_FLAGS_USES_PMEM) != 0 ||
(flags & private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP) != 0) {
PmemAllocator* pma = 0;
if ((flags & private_handle_t::PRIV_FLAGS_USES_PMEM) != 0) {
if ((flags & private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP) != 0) {
ALOGE("attempting to allocate a gralloc buffer with both the "
"USES_PMEM and USES_PMEM_ADSP flags. Unsetting the "
"USES_PMEM_ADSP flag.");
flags &= ~private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP;
}
pma = &pmemAllocator;
} else { // (flags & private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP) != 0
pma = &pmemAdspAllocator;
}
// PMEM buffers are always mmapped
lockState |= private_handle_t::LOCK_STATE_MAPPED;
// Allocate the buffer from pmem
err = pma->alloc_pmem_buffer(size, usage, &base, &offset, &fd);
if (err < 0) {
if (((usage & GRALLOC_USAGE_HW_MASK) == 0) &&
((usage & GRALLOC_USAGE_PRIVATE_PMEM_ADSP) == 0)) {
// the caller didn't request PMEM, so we can try something else
flags &= ~private_handle_t::PRIV_FLAGS_USES_PMEM;
err = 0;
goto try_ashmem;
} else {
ALOGE("couldn't open pmem (%s)", strerror(errno));
}
}
} else {
try_ashmem:
fd = deps.ashmem_create_region("gralloc-buffer", size);
if (fd < 0) {
ALOGE("couldn't create ashmem (%s)", strerror(errno));
err = -errno;
}
}
if (err == 0) {
private_handle_t* hnd = new private_handle_t(fd, size, flags);
hnd->offset = offset;
hnd->base = int(base)+offset;
hnd->lockState = lockState;
*pHandle = hnd;
}
ALOGE_IF(err, "gralloc failed err=%s", strerror(-err));
return err;
}
static inline size_t ALIGN(size_t x, size_t align) {
return (x + align-1) & ~(align-1);
}
int gpu_context_t::alloc_impl(int w, int h, int format, int usage,
buffer_handle_t* pHandle, int* pStride) {
if (!pHandle || !pStride)
return -EINVAL;
size_t size, alignedw, alignedh;
alignedw = ALIGN(w, 32);
alignedh = ALIGN(h, 32);
switch (format) {
case HAL_PIXEL_FORMAT_RGBA_8888:
case HAL_PIXEL_FORMAT_RGBX_8888:
case HAL_PIXEL_FORMAT_BGRA_8888:
size = alignedw * alignedh * 4;
break;
case HAL_PIXEL_FORMAT_RGB_888:
size = alignedw * alignedh * 3;
break;
case HAL_PIXEL_FORMAT_RGB_565:
case HAL_PIXEL_FORMAT_RGBA_5551:
case HAL_PIXEL_FORMAT_RGBA_4444:
size = alignedw * alignedh * 2;
break;
// adreno formats
case HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO: // NV21
size = ALIGN(alignedw*alignedh, 4096);
size += ALIGN(2 * ALIGN(w/2, 32) * ALIGN(h/2, 32), 4096);
break;
case HAL_PIXEL_FORMAT_YCbCr_420_SP_TILED: // NV12
// The chroma plane is subsampled,
// but the pitch in bytes is unchanged
// The GPU needs 4K alignment, but the video decoder needs 8K
alignedw = ALIGN(w, 128);
size = ALIGN( alignedw * alignedh, 8192);
size += ALIGN( alignedw * ALIGN(h/2, 32), 4096);
break;
case HAL_PIXEL_FORMAT_YV12:
if ((w&1) || (h&1)) {
ALOGE("w or h is odd for HAL_PIXEL_FORMAT_YV12");
return -EINVAL;
}
alignedw = ALIGN(w, 16);
alignedh = h;
size = alignedw*alignedh +
(ALIGN(alignedw/2, 16) * (alignedh/2))*2;
break;
default:
ALOGE("unrecognized pixel format: %d", format);
return -EINVAL;
}
if ((ssize_t)size <= 0)
return -EINVAL;
int err;
if (usage & GRALLOC_USAGE_HW_FB) {
err = gralloc_alloc_framebuffer(size, usage, pHandle);
} else {
err = gralloc_alloc_buffer(size, usage, pHandle);
}
if (err < 0) {
return err;
}
*pStride = alignedw;
return 0;
}
int gpu_context_t::free_impl(private_handle_t const* hnd) {
private_module_t* m = reinterpret_cast<private_module_t*>(common.module);
if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
// free this buffer
const size_t bufferSize = m->finfo.line_length * m->info.yres;
int index = (hnd->base - m->framebuffer->base) / bufferSize;
m->bufferMask &= ~(1<<index);
} else {
PmemAllocator* pmem_allocator = 0;
if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) {
pmem_allocator = &pmemAllocator;
} else if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM_ADSP) {
pmem_allocator = &pmemAdspAllocator;
}
if (pmem_allocator) {
pmem_allocator->free_pmem_buffer(hnd->size, (void*)hnd->base,
hnd->offset, hnd->fd);
}
deps.terminateBuffer(&m->base, const_cast<private_handle_t*>(hnd));
}
deps.close(hnd->fd);
delete hnd; // XXX JMG: move this to the deps
return 0;
}
/******************************************************************************
* Static functions
*****************************************************************************/
int gpu_context_t::gralloc_alloc(alloc_device_t* dev, int w, int h, int format,
int usage, buffer_handle_t* pHandle, int* pStride)
{
if (!dev) {
return -EINVAL;
}
gpu_context_t* gpu = reinterpret_cast<gpu_context_t*>(dev);
return gpu->alloc_impl(w, h, format, usage, pHandle, pStride);
}
int gpu_context_t::gralloc_free(alloc_device_t* dev,
buffer_handle_t handle)
{
if (private_handle_t::validate(handle) < 0)
return -EINVAL;
private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(handle);
gpu_context_t* gpu = reinterpret_cast<gpu_context_t*>(dev);
return gpu->free_impl(hnd);
}
/*****************************************************************************/
int gpu_context_t::gralloc_close(struct hw_device_t *dev)
{
gpu_context_t* ctx = reinterpret_cast<gpu_context_t*>(dev);
if (ctx) {
/* TODO: keep a list of all buffer_handle_t created, and free them
* all here.
*/
delete ctx;
}
return 0;
}
gpu_context_t::Deps::~Deps() {}