| /* |
| * 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. |
| */ |
| |
| #ifndef GRALLOC_QSD8K_PMEMALLOC_H |
| #define GRALLOC_QSD8K_PMEMALLOC_H |
| |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <unistd.h> |
| |
| |
| /** |
| * An interface to the PMEM allocators. |
| */ |
| class PmemAllocator { |
| |
| public: |
| |
| virtual ~PmemAllocator(); |
| |
| // Only valid after init_pmem_area() has completed successfully. |
| virtual void* get_base_address() = 0; |
| |
| virtual int alloc_pmem_buffer(size_t size, int usage, void** pBase, |
| int* pOffset, int* pFd) = 0; |
| virtual int free_pmem_buffer(size_t size, void* base, int offset, int fd) = 0; |
| }; |
| |
| |
| /** |
| * A PMEM allocator that allocates the entire pmem memory from the kernel and |
| * then uses a user-space allocator to suballocate from that. This requires |
| * that the PMEM device driver have kernel allocation disabled. |
| */ |
| class PmemUserspaceAllocator: public PmemAllocator { |
| |
| public: |
| |
| class Deps { |
| public: |
| |
| class Allocator { |
| public: |
| virtual ~Allocator(); |
| virtual ssize_t setSize(size_t size) = 0; |
| virtual size_t size() const = 0; |
| virtual ssize_t allocate(size_t size, uint32_t flags = 0) = 0; |
| virtual ssize_t deallocate(size_t offset) = 0; |
| }; |
| |
| virtual ~Deps(); |
| |
| // pmem |
| virtual size_t getPmemTotalSize(int fd, size_t* size) = 0; |
| virtual int connectPmem(int fd, int master_fd) = 0; |
| virtual int mapPmem(int fd, int offset, size_t size) = 0; |
| virtual int unmapPmem(int fd, int offset, size_t size) = 0; |
| |
| // C99 |
| virtual int getErrno() = 0; |
| |
| // POSIX |
| virtual void* mmap(void* start, size_t length, int prot, int flags, int fd, |
| off_t offset) = 0; |
| virtual int open(const char* pathname, int flags, int mode) = 0; |
| virtual int close(int fd) = 0; |
| }; |
| |
| PmemUserspaceAllocator(Deps& deps, Deps::Allocator& allocator, const char* pmemdev); |
| virtual ~PmemUserspaceAllocator(); |
| |
| // Only valid after init_pmem_area() has completed successfully. |
| virtual void* get_base_address(); |
| |
| virtual int init_pmem_area_locked(); |
| virtual int init_pmem_area(); |
| virtual int alloc_pmem_buffer(size_t size, int usage, void** pBase, |
| int* pOffset, int* pFd); |
| virtual int free_pmem_buffer(size_t size, void* base, int offset, int fd); |
| |
| #ifndef ANDROID_OS |
| // DO NOT USE: For testing purposes only. |
| void set_master_values(int fd, void* base) { |
| master_fd = fd; |
| master_base = base; |
| } |
| #endif // ANDROID_OS |
| |
| private: |
| |
| enum { |
| MASTER_FD_INIT = -1, |
| }; |
| |
| Deps& deps; |
| Deps::Allocator& allocator; |
| |
| pthread_mutex_t lock; |
| const char* pmemdev; |
| int master_fd; |
| void* master_base; |
| }; |
| |
| |
| /** |
| * A PMEM allocator that allocates each individual allocation from the kernel |
| * (using the kernel's allocator). This requires the kernel driver for the |
| * particular PMEM device being allocated from to support kernel allocation. |
| */ |
| class PmemKernelAllocator: public PmemAllocator { |
| |
| public: |
| |
| class Deps { |
| public: |
| |
| virtual ~Deps(); |
| |
| // C99 |
| virtual int getErrno() = 0; |
| |
| // POSIX |
| virtual void* mmap(void* start, size_t length, int prot, int flags, int fd, |
| off_t offset) = 0; |
| virtual int munmap(void* start, size_t length) = 0; |
| virtual int open(const char* pathname, int flags, int mode) = 0; |
| virtual int close(int fd) = 0; |
| }; |
| |
| PmemKernelAllocator(Deps& deps, const char* pmemdev); |
| virtual ~PmemKernelAllocator(); |
| |
| // Only valid after init_pmem_area() has completed successfully. |
| virtual void* get_base_address(); |
| |
| virtual int alloc_pmem_buffer(size_t size, int usage, void** pBase, |
| int* pOffset, int* pFd); |
| virtual int free_pmem_buffer(size_t size, void* base, int offset, int fd); |
| |
| private: |
| |
| Deps& deps; |
| |
| const char* pmemdev; |
| }; |
| |
| #endif // GRALLOC_QSD8K_PMEMALLOC_H |