104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#ifndef _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_
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#define _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_
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#include <linux/remote_spinlock.h>
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#include <soc/qcom/ramdump.h>
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#define SMD_HEAP_SIZE 512
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struct smem_heap_info {
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unsigned initialized;
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unsigned free_offset;
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unsigned heap_remaining;
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unsigned reserved;
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};
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struct smem_heap_entry {
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unsigned allocated;
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unsigned offset;
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unsigned size;
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unsigned reserved; /* bits 1:0 reserved, bits 31:2 aux smem base addr */
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};
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#define BASE_ADDR_MASK 0xfffffffc
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struct smem_proc_comm {
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unsigned command;
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unsigned status;
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unsigned data1;
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unsigned data2;
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};
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struct smem_shared {
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struct smem_proc_comm proc_comm[4];
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unsigned version[32];
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struct smem_heap_info heap_info;
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struct smem_heap_entry heap_toc[SMD_HEAP_SIZE];
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};
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struct smem_area {
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phys_addr_t phys_addr;
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resource_size_t size;
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void __iomem *virt_addr;
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};
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/* used for unit testing spinlocks */
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remote_spinlock_t *smem_get_remote_spinlock(void);
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bool smem_initialized_check(void);
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/**
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* smem_module_init_notifier_register() - Register a smem module
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* init notifier block
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* @nb: Notifier block to be registered
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*
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* In order to mark the dependency on SMEM Driver module initialization
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* register a notifier using this API. Once the smem module_init is
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* done, notification will be passed to the registered module.
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*/
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int smem_module_init_notifier_register(struct notifier_block *nb);
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/**
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* smem_module_init_notifier_register() - Unregister a smem module
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* init notifier block
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* @nb: Notifier block to be unregistered
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*/
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int smem_module_init_notifier_unregister(struct notifier_block *nb);
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/**
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* smem_get_free_space() - Get the available allocation free space for a
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* partition
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*
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* @to_proc: remote SMEM host. Determines the applicable partition
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* @returns: size in bytes available to allocate
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*
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* Helper function for SMD so that SMD only scans the channel allocation
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* table for a partition when it is reasonably certain that a channel has
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* actually been created, because scanning can be expensive. Creating a channel
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* will consume some of the free space in a partition, so SMD can compare the
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* last free space size against the current free space size to determine if
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* a channel may have been created. SMD can't do this directly, because the
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* necessary partition internals are restricted to just SMEM.
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*/
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unsigned smem_get_free_space(unsigned to_proc);
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/**
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* smem_get_version() - Get the smem user version number
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*
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* @idx: SMEM user idx in SMEM_VERSION_INFO table.
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* @returns: smem version number if success otherwise zero.
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*/
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unsigned smem_get_version(unsigned idx);
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#endif /* _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_ */
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