| /* Copyright (c) 2013,2017 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 |
| extern uint32_t smem_max_items; |
| |
| struct smem_heap_info { |
| unsigned int initialized; |
| unsigned int free_offset; |
| unsigned int heap_remaining; |
| unsigned int reserved; |
| }; |
| |
| struct smem_heap_entry { |
| unsigned int allocated; |
| unsigned int offset; |
| unsigned int size; |
| unsigned int reserved; /* [1:0] reserved, [31:2] aux smem base addr */ |
| }; |
| #define BASE_ADDR_MASK 0xfffffffc |
| |
| struct smem_proc_comm { |
| unsigned int command; |
| unsigned int status; |
| unsigned int data1; |
| unsigned int data2; |
| }; |
| |
| struct smem_shared { |
| struct smem_proc_comm proc_comm[4]; |
| unsigned int 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 int smem_get_free_space(unsigned int 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 int smem_get_version(unsigned int idx); |
| #endif /* _ARCH_ARM_MACH_MSM_SMEM_PRIVATE_H_ */ |