1685a6bf8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2b484b26cSGeorge Zhang /* 3b484b26cSGeorge Zhang * VMware VMCI Driver 4b484b26cSGeorge Zhang * 5b484b26cSGeorge Zhang * Copyright (C) 2012 VMware, Inc. All rights reserved. 6b484b26cSGeorge Zhang */ 7b484b26cSGeorge Zhang 8b484b26cSGeorge Zhang #ifndef _VMCI_HANDLE_ARRAY_H_ 9b484b26cSGeorge Zhang #define _VMCI_HANDLE_ARRAY_H_ 10b484b26cSGeorge Zhang 11b484b26cSGeorge Zhang #include <linux/vmw_vmci_defs.h> 121c2eb5b2SVishnu DASA #include <linux/limits.h> 13b484b26cSGeorge Zhang #include <linux/types.h> 14b484b26cSGeorge Zhang 15b484b26cSGeorge Zhang struct vmci_handle_arr { 161c2eb5b2SVishnu DASA u32 capacity; 171c2eb5b2SVishnu DASA u32 max_capacity; 181c2eb5b2SVishnu DASA u32 size; 191c2eb5b2SVishnu DASA u32 pad; 20b484b26cSGeorge Zhang struct vmci_handle entries[]; 21b484b26cSGeorge Zhang }; 22b484b26cSGeorge Zhang 231c2eb5b2SVishnu DASA #define VMCI_HANDLE_ARRAY_HEADER_SIZE \ 241c2eb5b2SVishnu DASA offsetof(struct vmci_handle_arr, entries) 251c2eb5b2SVishnu DASA /* Select a default capacity that results in a 64 byte sized array */ 261c2eb5b2SVishnu DASA #define VMCI_HANDLE_ARRAY_DEFAULT_CAPACITY 6 271c2eb5b2SVishnu DASA /* Make sure that the max array size can be expressed by a u32 */ 281c2eb5b2SVishnu DASA #define VMCI_HANDLE_ARRAY_MAX_CAPACITY \ 291c2eb5b2SVishnu DASA ((U32_MAX - VMCI_HANDLE_ARRAY_HEADER_SIZE - 1) / \ 301c2eb5b2SVishnu DASA sizeof(struct vmci_handle)) 311c2eb5b2SVishnu DASA 321c2eb5b2SVishnu DASA struct vmci_handle_arr *vmci_handle_arr_create(u32 capacity, u32 max_capacity); 33b484b26cSGeorge Zhang void vmci_handle_arr_destroy(struct vmci_handle_arr *array); 341c2eb5b2SVishnu DASA int vmci_handle_arr_append_entry(struct vmci_handle_arr **array_ptr, 35b484b26cSGeorge Zhang struct vmci_handle handle); 36b484b26cSGeorge Zhang struct vmci_handle vmci_handle_arr_remove_entry(struct vmci_handle_arr *array, 37b484b26cSGeorge Zhang struct vmci_handle 38b484b26cSGeorge Zhang entry_handle); 39b484b26cSGeorge Zhang struct vmci_handle vmci_handle_arr_remove_tail(struct vmci_handle_arr *array); 40b484b26cSGeorge Zhang struct vmci_handle 411c2eb5b2SVishnu DASA vmci_handle_arr_get_entry(const struct vmci_handle_arr *array, u32 index); 42b484b26cSGeorge Zhang bool vmci_handle_arr_has_entry(const struct vmci_handle_arr *array, 43b484b26cSGeorge Zhang struct vmci_handle entry_handle); 44b484b26cSGeorge Zhang struct vmci_handle *vmci_handle_arr_get_handles(struct vmci_handle_arr *array); 45b484b26cSGeorge Zhang vmci_handle_arr_get_size(const struct vmci_handle_arr * array)461c2eb5b2SVishnu DASAstatic inline u32 vmci_handle_arr_get_size( 47b484b26cSGeorge Zhang const struct vmci_handle_arr *array) 48b484b26cSGeorge Zhang { 49b484b26cSGeorge Zhang return array->size; 50b484b26cSGeorge Zhang } 51b484b26cSGeorge Zhang 52b484b26cSGeorge Zhang 53b484b26cSGeorge Zhang #endif /* _VMCI_HANDLE_ARRAY_H_ */ 54