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/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_
#define _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_
#include <linux/remote_spinlock.h>
#include <soc/qcom/ramdump.h>
#define SMD_HEAP_SIZE 512
struct smem_heap_info {
unsigned initialized;
unsigned free_offset;
unsigned heap_remaining;
unsigned reserved;
};
struct smem_heap_entry {
unsigned allocated;
unsigned offset;
unsigned size;
unsigned reserved; /* bits 1:0 reserved, bits 31:2 aux smem base addr */
};
#define BASE_ADDR_MASK 0xfffffffc
struct smem_proc_comm {
unsigned command;
unsigned status;
unsigned data1;
unsigned data2;
};
struct smem_shared {
struct smem_proc_comm proc_comm[4];
unsigned version[32];
struct smem_heap_info heap_info;
struct smem_heap_entry heap_toc[SMD_HEAP_SIZE];
};
struct smem_area {
phys_addr_t phys_addr;
resource_size_t size;
void __iomem *virt_addr;
};
/* used for unit testing spinlocks */
remote_spinlock_t *smem_get_remote_spinlock(void);
bool smem_initialized_check(void);
/**
* smem_module_init_notifier_register() - Register a smem module
* init notifier block
* @nb: Notifier block to be registered
*
* In order to mark the dependency on SMEM Driver module initialization
* register a notifier using this API. Once the smem module_init is
* done, notification will be passed to the registered module.
*/
int smem_module_init_notifier_register(struct notifier_block *nb);
/**
* smem_module_init_notifier_register() - Unregister a smem module
* init notifier block
* @nb: Notifier block to be unregistered
*/
int smem_module_init_notifier_unregister(struct notifier_block *nb);
/**
* smem_get_free_space() - Get the available allocation free space for a
* partition
*
* @to_proc: remote SMEM host. Determines the applicable partition
* @returns: size in bytes available to allocate
*
* Helper function for SMD so that SMD only scans the channel allocation
* table for a partition when it is reasonably certain that a channel has
* actually been created, because scanning can be expensive. Creating a channel
* will consume some of the free space in a partition, so SMD can compare the
* last free space size against the current free space size to determine if
* a channel may have been created. SMD can't do this directly, because the
* necessary partition internals are restricted to just SMEM.
*/
unsigned smem_get_free_space(unsigned to_proc);
/**
* smem_get_version() - Get the smem user version number
*
* @idx: SMEM user idx in SMEM_VERSION_INFO table.
* @returns: smem version number if success otherwise zero.
*/
unsigned smem_get_version(unsigned idx);
#endif /* _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_ */
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