5bc176b1a6
The purpose of this change is to add support for allocating gralloc buffers from either /dev/pmem or /dev/pmem_adsp depending on the usage flags. It does this by factoring out and abstracting the interactions with the pmem device. For /dev/pmem allocations, the kernel allocator is not used, so a single master fd is opened, and all the allocations are sub-allocated from that by gralloc. For /dev/pmem_adsp the kernel allocator is used, so it simply opens a new fd for each allocation. A very basic unit test that can be run on the host is included. It requires gtest, so to run it on a host system gtest must (currently) be compiled with BUILD_WITH_ASTL=true. Change-Id: If2ae0151698fad8107e18e808a3fa012a846263f
147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/*
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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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#ifndef GRALLOC_PRIV_H_
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#define GRALLOC_PRIV_H_
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#include <stdint.h>
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#include <limits.h>
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#include <sys/cdefs.h>
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#include <hardware/gralloc.h>
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#include <pthread.h>
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#include <errno.h>
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#include <unistd.h>
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#include <cutils/native_handle.h>
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#include <linux/fb.h>
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enum {
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/* gralloc usage bit indicating a pmem_adsp allocation should be used */
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GRALLOC_USAGE_PRIVATE_PMEM_ADSP = GRALLOC_USAGE_PRIVATE_0,
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};
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/*****************************************************************************/
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struct private_module_t;
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struct private_handle_t;
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struct PmemAllocator;
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struct private_module_t {
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gralloc_module_t base;
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struct private_handle_t* framebuffer;
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uint32_t fbFormat;
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uint32_t flags;
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uint32_t numBuffers;
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uint32_t bufferMask;
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pthread_mutex_t lock;
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buffer_handle_t currentBuffer;
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struct fb_var_screeninfo info;
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struct fb_fix_screeninfo finfo;
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float xdpi;
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float ydpi;
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float fps;
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enum {
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// flag to indicate we'll post this buffer
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PRIV_USAGE_LOCKED_FOR_POST = 0x80000000
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};
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};
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/*****************************************************************************/
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#ifdef __cplusplus
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struct private_handle_t : public native_handle {
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#else
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struct private_handle_t {
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native_handle_t nativeHandle;
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#endif
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enum {
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PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
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PRIV_FLAGS_USES_PMEM = 0x00000002,
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PRIV_FLAGS_USES_PMEM_ADSP = 0x00000004,
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PRIV_FLAGS_NEEDS_FLUSH = 0x00000008,
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};
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enum {
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LOCK_STATE_WRITE = 1<<31,
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LOCK_STATE_MAPPED = 1<<30,
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LOCK_STATE_READ_MASK = 0x3FFFFFFF
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};
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// file-descriptors
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int fd;
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// ints
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int magic;
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int flags;
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int size;
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int offset;
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int gpu_fd; // stored as an int, b/c we don't want it marshalled
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// FIXME: the attributes below should be out-of-line
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int base;
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int lockState;
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int writeOwner;
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int gpuaddr; // The gpu address mapped into the mmu. If using ashmem, set to 0 They don't care
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int pid;
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#ifdef __cplusplus
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static const int sNumInts = 10;
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static const int sNumFds = 1;
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static const int sMagic = 'gmsm';
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private_handle_t(int fd, int size, int flags) :
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fd(fd), magic(sMagic), flags(flags), size(size), offset(0), gpu_fd(-1),
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base(0), lockState(0), writeOwner(0), gpuaddr(0), pid(getpid())
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{
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version = sizeof(native_handle);
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numInts = sNumInts;
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numFds = sNumFds;
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}
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~private_handle_t() {
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magic = 0;
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}
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bool usesPhysicallyContiguousMemory() {
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return (flags & PRIV_FLAGS_USES_PMEM) != 0;
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}
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static int validate(const native_handle* h) {
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const private_handle_t* hnd = (const private_handle_t*)h;
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if (!h || h->version != sizeof(native_handle) ||
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h->numInts != sNumInts || h->numFds != sNumFds ||
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hnd->magic != sMagic)
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{
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LOGE("invalid gralloc handle (at %p)", h);
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return -EINVAL;
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}
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return 0;
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}
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static private_handle_t* dynamicCast(const native_handle* in) {
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if (validate(in) == 0) {
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return (private_handle_t*) in;
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}
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return NULL;
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}
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#endif
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};
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#endif /* GRALLOC_PRIV_H_ */
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