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android_hardware_qcom_display/mapper.cpp
Naseer Ahmed 4e3b559b23 msm7k: Add support for non-cached blit 
Add support for the userspace to make MDP
avoid flushing the source image buffer
This change is needed if we are using
cached video buffers. Since the MDP driver
used to flush the entire source buffer before
the blit, it was a huge overhead in terms of CPU
usage for cases where the entire buffer didn't
really need flushing. Any clients that modify
the video buffers with CPU should now ensure that
they flush the region that they modified (if the
memory is cached)

Change-Id: I94572644ed5aefac3184b45df05d10be0f2c7660
2011-07-15 00:05:26 +05:30

492 lines
16 KiB
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/*
* Copyright (C) 2008 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 <errno.h>
#include <pthread.h>
#include <unistd.h>
#include <string.h>
#include <stdarg.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/ashmem.h>
#include <cutils/log.h>
#include <cutils/atomic.h>
#include <cutils/ashmem.h>
#include <hardware/hardware.h>
#include <hardware/gralloc.h>
#include <linux/android_pmem.h>
#include "gralloc_priv.h"
#include "gr.h"
// we need this for now because pmem cannot mmap at an offset
#define PMEM_HACK 1
/* desktop Linux needs a little help with gettid() */
#if defined(ARCH_X86) && !defined(HAVE_ANDROID_OS)
#define __KERNEL__
# include <linux/unistd.h>
pid_t gettid() { return syscall(__NR_gettid);}
#undef __KERNEL__
#endif
/*****************************************************************************/
static int gralloc_map(gralloc_module_t const* module,
buffer_handle_t handle,
void** vaddr)
{
private_handle_t* hnd = (private_handle_t*)handle;
void *mappedAddress;
if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
size_t size = hnd->size;
#if PMEM_HACK
size += hnd->offset;
#endif
if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_ASHMEM) {
mappedAddress = mmap(0, size,
PROT_READ|PROT_WRITE, MAP_SHARED | MAP_POPULATE, hnd->fd, 0);
} else {
mappedAddress = mmap(0, size,
PROT_READ|PROT_WRITE, MAP_SHARED, hnd->fd, 0);
}
if (mappedAddress == MAP_FAILED) {
LOGE("Could not mmap handle %p, fd=%d (%s)",
handle, hnd->fd, strerror(errno));
hnd->base = 0;
return -errno;
}
hnd->base = intptr_t(mappedAddress) + hnd->offset;
//LOGD("gralloc_map() succeeded fd=%d, off=%d, size=%d, vaddr=%p",
// hnd->fd, hnd->offset, hnd->size, mappedAddress);
}
*vaddr = (void*)hnd->base;
return 0;
}
static int gralloc_unmap(gralloc_module_t const* module,
buffer_handle_t handle)
{
private_handle_t* hnd = (private_handle_t*)handle;
if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
void* base = (void*)hnd->base;
size_t size = hnd->size;
#if PMEM_HACK
base = (void*)(intptr_t(base) - hnd->offset);
size += hnd->offset;
#endif
//LOGD("unmapping from %p, size=%d", base, size);
if (munmap(base, size) < 0) {
LOGE("Could not unmap %s", strerror(errno));
}
}
hnd->base = 0;
return 0;
}
/*****************************************************************************/
static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER;
/*****************************************************************************/
int gralloc_register_buffer(gralloc_module_t const* module,
buffer_handle_t handle)
{
if (private_handle_t::validate(handle) < 0)
return -EINVAL;
// In this implementation, we don't need to do anything here
/* NOTE: we need to initialize the buffer as not mapped/not locked
* because it shouldn't when this function is called the first time
* in a new process. Ideally these flags shouldn't be part of the
* handle, but instead maintained in the kernel or at least
* out-of-line
*/
// if this handle was created in this process, then we keep it as is.
private_handle_t* hnd = (private_handle_t*)handle;
if (hnd->pid != getpid()) {
hnd->base = 0;
hnd->lockState = 0;
hnd->writeOwner = 0;
}
return 0;
}
int gralloc_unregister_buffer(gralloc_module_t const* module,
buffer_handle_t handle)
{
if (private_handle_t::validate(handle) < 0)
return -EINVAL;
/*
* If the buffer has been mapped during a lock operation, it's time
* to un-map it. It's an error to be here with a locked buffer.
* NOTE: the framebuffer is handled differently and is never unmapped.
*/
private_handle_t* hnd = (private_handle_t*)handle;
LOGE_IF(hnd->lockState & private_handle_t::LOCK_STATE_READ_MASK,
"[unregister] handle %p still locked (state=%08x)",
hnd, hnd->lockState);
// never unmap buffers that were created in this process
if (hnd->pid != getpid()) {
if (hnd->lockState & private_handle_t::LOCK_STATE_MAPPED) {
gralloc_unmap(module, handle);
}
hnd->base = 0;
hnd->lockState = 0;
hnd->writeOwner = 0;
}
return 0;
}
int terminateBuffer(gralloc_module_t const* module,
private_handle_t* hnd)
{
/*
* If the buffer has been mapped during a lock operation, it's time
* to un-map it. It's an error to be here with a locked buffer.
*/
LOGE_IF(hnd->lockState & private_handle_t::LOCK_STATE_READ_MASK,
"[terminate] handle %p still locked (state=%08x)",
hnd, hnd->lockState);
if (hnd->lockState & private_handle_t::LOCK_STATE_MAPPED) {
// this buffer was mapped, unmap it now
if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM ||
hnd->flags & private_handle_t::PRIV_FLAGS_USES_ASHMEM) {
if (hnd->pid != getpid()) {
// ... unless it's a "master" pmem buffer, that is a buffer
// mapped in the process it's been allocated.
// (see gralloc_alloc_buffer())
gralloc_unmap(module, hnd);
}
} else {
gralloc_unmap(module, hnd);
}
}
return 0;
}
int gralloc_lock(gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
void** vaddr)
{
if (private_handle_t::validate(handle) < 0)
return -EINVAL;
int err = 0;
private_handle_t* hnd = (private_handle_t*)handle;
int32_t current_value, new_value;
int retry;
do {
current_value = hnd->lockState;
new_value = current_value;
if (current_value & private_handle_t::LOCK_STATE_WRITE) {
// already locked for write
LOGE("handle %p already locked for write", handle);
return -EBUSY;
} else if (current_value & private_handle_t::LOCK_STATE_READ_MASK) {
// already locked for read
if (usage & (GRALLOC_USAGE_SW_WRITE_MASK | GRALLOC_USAGE_HW_RENDER)) {
LOGE("handle %p already locked for read", handle);
return -EBUSY;
} else {
// this is not an error
//LOGD("%p already locked for read... count = %d",
// handle, (current_value & ~(1<<31)));
}
}
// not currently locked
if (usage & (GRALLOC_USAGE_SW_WRITE_MASK | GRALLOC_USAGE_HW_RENDER)) {
// locking for write
new_value |= private_handle_t::LOCK_STATE_WRITE;
}
new_value++;
retry = android_atomic_cmpxchg(current_value, new_value,
(volatile int32_t*)&hnd->lockState);
} while (retry);
if (new_value & private_handle_t::LOCK_STATE_WRITE) {
// locking for write, store the tid
hnd->writeOwner = gettid();
}
// if requesting sw write for non-framebuffer handles, flag for
// flushing at unlock
if ((usage & GRALLOC_USAGE_SW_WRITE_MASK) &&
!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
hnd->flags |= private_handle_t::PRIV_FLAGS_NEEDS_FLUSH;
}
if (usage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK)) {
if (!(current_value & private_handle_t::LOCK_STATE_MAPPED)) {
// we need to map for real
pthread_mutex_t* const lock = &sMapLock;
pthread_mutex_lock(lock);
if (!(hnd->lockState & private_handle_t::LOCK_STATE_MAPPED)) {
err = gralloc_map(module, handle, vaddr);
if (err == 0) {
android_atomic_or(private_handle_t::LOCK_STATE_MAPPED,
(volatile int32_t*)&(hnd->lockState));
}
}
pthread_mutex_unlock(lock);
}
*vaddr = (void*)hnd->base;
}
return err;
}
int gralloc_unlock(gralloc_module_t const* module,
buffer_handle_t handle)
{
if (private_handle_t::validate(handle) < 0)
return -EINVAL;
private_handle_t* hnd = (private_handle_t*)handle;
int32_t current_value, new_value;
if (hnd->flags & private_handle_t::PRIV_FLAGS_NEEDS_FLUSH) {
int err;
if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) {
struct pmem_addr pmem_addr;
pmem_addr.vaddr = hnd->base;
pmem_addr.offset = hnd->offset;
pmem_addr.length = hnd->size;
err = ioctl( hnd->fd, PMEM_CLEAN_CACHES, &pmem_addr);
} else if ((hnd->flags & private_handle_t::PRIV_FLAGS_USES_ASHMEM)) {
unsigned long addr = hnd->base + hnd->offset;
err = ioctl(hnd->fd, ASHMEM_CACHE_FLUSH_RANGE, NULL);
}
LOGE_IF(err < 0, "cannot flush handle %p (offs=%x len=%x)\n",
hnd, hnd->offset, hnd->size);
hnd->flags &= ~private_handle_t::PRIV_FLAGS_NEEDS_FLUSH;
}
do {
current_value = hnd->lockState;
new_value = current_value;
if (current_value & private_handle_t::LOCK_STATE_WRITE) {
// locked for write
if (hnd->writeOwner == gettid()) {
hnd->writeOwner = 0;
new_value &= ~private_handle_t::LOCK_STATE_WRITE;
}
}
if ((new_value & private_handle_t::LOCK_STATE_READ_MASK) == 0) {
LOGE("handle %p not locked", handle);
return -EINVAL;
}
new_value--;
} while (android_atomic_cmpxchg(current_value, new_value,
(volatile int32_t*)&hnd->lockState));
return 0;
}
/*****************************************************************************/
int gralloc_perform(struct gralloc_module_t const* module,
int operation, ... )
{
int res = -EINVAL;
va_list args;
va_start(args, operation);
switch (operation) {
case GRALLOC_MODULE_PERFORM_CREATE_HANDLE_FROM_BUFFER: {
int fd = va_arg(args, int);
size_t size = va_arg(args, size_t);
size_t offset = va_arg(args, size_t);
void* base = va_arg(args, void*);
native_handle_t** handle = va_arg(args, native_handle_t**);
int memoryFlags = va_arg(args, int);
if (memoryFlags == GRALLOC_USAGE_PRIVATE_PMEM) {
// validate that it's indeed a pmem buffer
pmem_region region;
if (ioctl(fd, PMEM_GET_SIZE, &region) < 0) {
break;
}
}
private_handle_t* hnd = (private_handle_t*)native_handle_create(
private_handle_t::sNumFds, private_handle_t::sNumInts);
hnd->magic = private_handle_t::sMagic;
hnd->fd = fd;
hnd->flags = (memoryFlags == GRALLOC_USAGE_PRIVATE_PMEM) ?
private_handle_t::PRIV_FLAGS_USES_PMEM |
private_handle_t::PRIV_FLAGS_DO_NOT_FLUSH:
private_handle_t::PRIV_FLAGS_USES_ASHMEM;
hnd->size = size;
hnd->offset = offset;
hnd->base = intptr_t(base) + offset;
hnd->lockState = private_handle_t::LOCK_STATE_MAPPED;
hnd->gpuaddr = 0;
*handle = (native_handle_t *)hnd;
res = 0;
break;
}
case GRALLOC_MODULE_PERFORM_DECIDE_PUSH_BUFFER_HANDLING: {
int format = va_arg(args, int);
int width = va_arg(args, int);
int height = va_arg(args, int);
char *compositionUsed = va_arg(args, char*);
int hasBlitEngine = va_arg(args, int);
int *needConversion = va_arg(args, int*);
int *useBufferDirectly = va_arg(args, int*);
size_t *size = va_arg(args, size_t*);
*size = calculateBufferSize(width, height, format);
int conversion = 0;
int direct = 0;
res = decideBufferHandlingMechanism(format, compositionUsed, hasBlitEngine,
needConversion, useBufferDirectly);
break;
}
default:
break;
}
va_end(args);
return res;
}
int decideBufferHandlingMechanism(int format, const char *compositionUsed, int hasBlitEngine,
int *needConversion, int *useBufferDirectly)
{
*needConversion = FALSE;
*useBufferDirectly = FALSE;
if(compositionUsed == NULL) {
LOGE("null pointer");
return -1;
}
if(format == HAL_PIXEL_FORMAT_RGB_565) {
// Software video renderer gives the output in RGB565 format.
// This can be handled by all compositors
*needConversion = FALSE;
*useBufferDirectly = TRUE;
} else if(strncmp(compositionUsed, "cpu", 3) == 0){
*needConversion = FALSE;
*useBufferDirectly = FALSE;
} else if(strncmp(compositionUsed, "gpu", 3) == 0) {
if(format == HAL_PIXEL_FORMAT_YCbCr_420_SP_TILED ||
format == HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO ||
format == HAL_PIXEL_FORMAT_YV12) {
*needConversion = FALSE;
*useBufferDirectly = TRUE;
} else if(hasBlitEngine) {
*needConversion = TRUE;
*useBufferDirectly = FALSE;
}
} else if ((strncmp(compositionUsed, "mdp", 3) == 0) ||
(strncmp(compositionUsed, "c2d", 3) == 0)){
if(format == HAL_PIXEL_FORMAT_YCbCr_420_SP ||
format == HAL_PIXEL_FORMAT_YCrCb_420_SP ||
format == HAL_PIXEL_FORMAT_YV12) {
*needConversion = FALSE;
*useBufferDirectly = TRUE;
} else if((strncmp(compositionUsed, "c2d", 3) == 0) &&
format == HAL_PIXEL_FORMAT_YCbCr_420_SP_TILED) {
*needConversion = FALSE;
*useBufferDirectly = TRUE;
} else if(hasBlitEngine) {
*needConversion = TRUE;
*useBufferDirectly = FALSE;
}
} else {
LOGE("Invalid composition type %s", compositionUsed);
return -1;
}
return 0;
}
size_t calculateBufferSize(int width, int height, int format)
{
if(!width || !height)
return 0;
size_t size = 0;
switch (format)
{
case HAL_PIXEL_FORMAT_YCbCr_420_SP_TILED: {
int aligned_height = (height + 31) & ~31;
int pitch = (width + 127) & ~127;
size = pitch * aligned_height;
size = (size + 8191) & ~8191;
int secondPlaneOffset = size;
aligned_height = ((height >> 1) + 31) & ~31;
size += pitch * aligned_height;
size = (size + 8191) & ~8191;
break;
}
case HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO: {
int aligned_height = (height + 31) & ~31;
int pitch = (width + 31) & ~31;
size = pitch * aligned_height;
size = (size + 4095) & ~4095;
int secondPlaneOffset = size;
pitch = 2 * (((width >> 1) + 31) & ~31);
aligned_height = ((height >> 1) + 31) & ~31;
size += pitch * aligned_height;
size = (size + 4095) & ~4095;
break;
}
case HAL_PIXEL_FORMAT_YCrCb_420_SP:
case HAL_PIXEL_FORMAT_YCbCr_420_SP:
case HAL_PIXEL_FORMAT_YV12: {
/* Camera and video YUV 420 semi-planar buffers are allocated with
size equal to w * h * 1.5 */
int aligned_width = (width + 15) & ~15;
int aligned_chroma_width = ((width/2) + 15) & ~15;
size = (aligned_width * height) + ((aligned_chroma_width * height/2) *2);
break;
}
default:
break;
}
return size;
}
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