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Diffstat (limited to 'drivers/soc/qcom/smem_private.h')
| -rw-r--r-- | drivers/soc/qcom/smem_private.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/soc/qcom/smem_private.h b/drivers/soc/qcom/smem_private.h new file mode 100644 index 000000000000..7aeca5eed8d2 --- /dev/null +++ b/drivers/soc/qcom/smem_private.h @@ -0,0 +1,104 @@ +/* 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_ */ |