186 lines
6.1 KiB
C
186 lines
6.1 KiB
C
/* include/linux/android_pmem.h
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*
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* Copyright (C) 2007 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _ANDROID_PMEM_H_
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#define _ANDROID_PMEM_H_
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#include <linux/fs.h>
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#define PMEM_KERNEL_TEST_MAGIC 0xc0
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#define PMEM_KERNEL_TEST_NOMINAL_TEST_IOCTL \
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_IO(PMEM_KERNEL_TEST_MAGIC, 1)
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#define PMEM_KERNEL_TEST_ADVERSARIAL_TEST_IOCTL \
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_IO(PMEM_KERNEL_TEST_MAGIC, 2)
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#define PMEM_KERNEL_TEST_HUGE_ALLOCATION_TEST_IOCTL \
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_IO(PMEM_KERNEL_TEST_MAGIC, 3)
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#define PMEM_KERNEL_TEST_FREE_UNALLOCATED_TEST_IOCTL \
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_IO(PMEM_KERNEL_TEST_MAGIC, 4)
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#define PMEM_KERNEL_TEST_LARGE_REGION_NUMBER_TEST_IOCTL \
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_IO(PMEM_KERNEL_TEST_MAGIC, 5)
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#define PMEM_IOCTL_MAGIC 'p'
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#define PMEM_GET_PHYS _IOW(PMEM_IOCTL_MAGIC, 1, unsigned int)
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#define PMEM_MAP _IOW(PMEM_IOCTL_MAGIC, 2, unsigned int)
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#define PMEM_GET_SIZE _IOW(PMEM_IOCTL_MAGIC, 3, unsigned int)
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#define PMEM_UNMAP _IOW(PMEM_IOCTL_MAGIC, 4, unsigned int)
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/* This ioctl will allocate pmem space, backing the file, it will fail
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* if the file already has an allocation, pass it the len as the argument
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* to the ioctl */
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#define PMEM_ALLOCATE _IOW(PMEM_IOCTL_MAGIC, 5, unsigned int)
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/* This will connect a one pmem file to another, pass the file that is already
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* backed in memory as the argument to the ioctl
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*/
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#define PMEM_CONNECT _IOW(PMEM_IOCTL_MAGIC, 6, unsigned int)
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/* Returns the total size of the pmem region it is sent to as a pmem_region
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* struct (with offset set to 0).
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*/
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#define PMEM_GET_TOTAL_SIZE _IOW(PMEM_IOCTL_MAGIC, 7, unsigned int)
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/* Revokes gpu registers and resets the gpu. Pass a pointer to the
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* start of the mapped gpu regs (the vaddr returned by mmap) as the argument.
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*/
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#define HW3D_REVOKE_GPU _IOW(PMEM_IOCTL_MAGIC, 8, unsigned int)
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#define HW3D_GRANT_GPU _IOW(PMEM_IOCTL_MAGIC, 9, unsigned int)
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#define HW3D_WAIT_FOR_INTERRUPT _IOW(PMEM_IOCTL_MAGIC, 10, unsigned int)
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#define PMEM_CLEAN_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 11, unsigned int)
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#define PMEM_CLEAN_CACHES _IOW(PMEM_IOCTL_MAGIC, 12, unsigned int)
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#define PMEM_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 13, unsigned int)
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#define PMEM_GET_FREE_SPACE _IOW(PMEM_IOCTL_MAGIC, 14, unsigned int)
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#define PMEM_ALLOCATE_ALIGNED _IOW(PMEM_IOCTL_MAGIC, 15, unsigned int)
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struct pmem_region {
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unsigned long offset;
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unsigned long len;
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};
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struct pmem_addr {
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unsigned long vaddr;
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unsigned long offset;
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unsigned long length;
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};
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struct pmem_freespace {
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unsigned long total;
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unsigned long largest;
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};
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struct pmem_allocation {
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unsigned long size;
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unsigned int align;
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};
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#ifdef __KERNEL__
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int get_pmem_file(unsigned int fd, unsigned long *start, unsigned long *vstart,
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unsigned long *end, struct file **filp);
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int get_pmem_fd(int fd, unsigned long *start, unsigned long *end);
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int get_pmem_user_addr(struct file *file, unsigned long *start,
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unsigned long *end);
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void put_pmem_file(struct file* file);
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void put_pmem_fd(int fd);
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void flush_pmem_fd(int fd, unsigned long start, unsigned long len);
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void flush_pmem_file(struct file *file, unsigned long start, unsigned long len);
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int pmem_cache_maint(struct file *file, unsigned int cmd,
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struct pmem_addr *pmem_addr);
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enum pmem_allocator_type {
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/* Zero is a default in platform PMEM structures in the board files,
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* when the "allocator_type" structure element is not explicitly
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* defined
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*/
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PMEM_ALLOCATORTYPE_BITMAP = 0, /* forced to be zero here */
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PMEM_ALLOCATORTYPE_SYSTEM,
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PMEM_ALLOCATORTYPE_ALLORNOTHING,
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PMEM_ALLOCATORTYPE_BUDDYBESTFIT,
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PMEM_ALLOCATORTYPE_MAX,
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};
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#define PMEM_MEMTYPE_MASK 0x7
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#define PMEM_INVALID_MEMTYPE 0x0
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#define PMEM_MEMTYPE_EBI1 0x1
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#define PMEM_MEMTYPE_SMI 0x2
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#define PMEM_MEMTYPE_RESERVED_INVALID2 0x3
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#define PMEM_MEMTYPE_RESERVED_INVALID3 0x4
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#define PMEM_MEMTYPE_RESERVED_INVALID4 0x5
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#define PMEM_MEMTYPE_RESERVED_INVALID5 0x6
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#define PMEM_MEMTYPE_RESERVED_INVALID6 0x7
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#define PMEM_ALIGNMENT_MASK 0x18
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#define PMEM_ALIGNMENT_RESERVED_INVALID1 0x0
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#define PMEM_ALIGNMENT_4K 0x8 /* the default */
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#define PMEM_ALIGNMENT_1M 0x10
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#define PMEM_ALIGNMENT_RESERVED_INVALID2 0x18
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/* flags in the following function defined as above. */
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int32_t pmem_kalloc(const size_t size, const uint32_t flags);
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int32_t pmem_kfree(const int32_t physaddr);
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/* kernel api names for board specific data structures */
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#define PMEM_KERNEL_EBI1_DATA_NAME "pmem_kernel_ebi1"
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#define PMEM_KERNEL_SMI_DATA_NAME "pmem_kernel_smi"
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struct android_pmem_platform_data
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{
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const char* name;
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/* size of memory region */
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unsigned long size;
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enum pmem_allocator_type allocator_type;
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/* treated as a 'hidden' variable in the board files. Can be
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* set, but default is the system init value of 0 which becomes a
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* quantum of 4K pages.
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*/
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unsigned int quantum;
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/* set to indicate maps of this region should be cached, if a mix of
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* cached and uncached is desired, set this and open the device with
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* O_SYNC to get an uncached region */
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unsigned cached;
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/* The MSM7k has bits to enable a write buffer in the bus controller*/
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unsigned buffered;
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/* which memory type (i.e. SMI, EBI1) this PMEM device is backed by */
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unsigned memory_type;
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/*
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* function to be called when the number of allocations goes from
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* 0 -> 1
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*/
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void (*request_region)(void *);
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/*
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* function to be called when the number of allocations goes from
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* 1 -> 0
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*/
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void (*release_region)(void *);
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/*
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* function to be called upon pmem registration
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*/
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void *(*setup_region)(void);
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/*
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* indicates that this region should be mapped/unmaped as needed
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*/
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int map_on_demand;
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};
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int pmem_setup(struct android_pmem_platform_data *pdata,
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long (*ioctl)(struct file *, unsigned int, unsigned long),
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int (*release)(struct inode *, struct file *));
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int pmem_remap(struct pmem_region *region, struct file *file,
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unsigned operation);
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#endif /* __KERNEL__ */
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#endif //_ANDROID_PPP_H_
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