1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * VMware VMCI Driver 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2012 VMware, Inc. All rights reserved. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _VMCI_HANDLE_ARRAY_H_ 9*4882a593Smuzhiyun #define _VMCI_HANDLE_ARRAY_H_ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/vmw_vmci_defs.h> 12*4882a593Smuzhiyun #include <linux/limits.h> 13*4882a593Smuzhiyun #include <linux/types.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun struct vmci_handle_arr { 16*4882a593Smuzhiyun u32 capacity; 17*4882a593Smuzhiyun u32 max_capacity; 18*4882a593Smuzhiyun u32 size; 19*4882a593Smuzhiyun u32 pad; 20*4882a593Smuzhiyun struct vmci_handle entries[]; 21*4882a593Smuzhiyun }; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #define VMCI_HANDLE_ARRAY_HEADER_SIZE \ 24*4882a593Smuzhiyun offsetof(struct vmci_handle_arr, entries) 25*4882a593Smuzhiyun /* Select a default capacity that results in a 64 byte sized array */ 26*4882a593Smuzhiyun #define VMCI_HANDLE_ARRAY_DEFAULT_CAPACITY 6 27*4882a593Smuzhiyun /* Make sure that the max array size can be expressed by a u32 */ 28*4882a593Smuzhiyun #define VMCI_HANDLE_ARRAY_MAX_CAPACITY \ 29*4882a593Smuzhiyun ((U32_MAX - VMCI_HANDLE_ARRAY_HEADER_SIZE - 1) / \ 30*4882a593Smuzhiyun sizeof(struct vmci_handle)) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun struct vmci_handle_arr *vmci_handle_arr_create(u32 capacity, u32 max_capacity); 33*4882a593Smuzhiyun void vmci_handle_arr_destroy(struct vmci_handle_arr *array); 34*4882a593Smuzhiyun int vmci_handle_arr_append_entry(struct vmci_handle_arr **array_ptr, 35*4882a593Smuzhiyun struct vmci_handle handle); 36*4882a593Smuzhiyun struct vmci_handle vmci_handle_arr_remove_entry(struct vmci_handle_arr *array, 37*4882a593Smuzhiyun struct vmci_handle 38*4882a593Smuzhiyun entry_handle); 39*4882a593Smuzhiyun struct vmci_handle vmci_handle_arr_remove_tail(struct vmci_handle_arr *array); 40*4882a593Smuzhiyun struct vmci_handle 41*4882a593Smuzhiyun vmci_handle_arr_get_entry(const struct vmci_handle_arr *array, u32 index); 42*4882a593Smuzhiyun bool vmci_handle_arr_has_entry(const struct vmci_handle_arr *array, 43*4882a593Smuzhiyun struct vmci_handle entry_handle); 44*4882a593Smuzhiyun struct vmci_handle *vmci_handle_arr_get_handles(struct vmci_handle_arr *array); 45*4882a593Smuzhiyun vmci_handle_arr_get_size(const struct vmci_handle_arr * array)46*4882a593Smuzhiyunstatic inline u32 vmci_handle_arr_get_size( 47*4882a593Smuzhiyun const struct vmci_handle_arr *array) 48*4882a593Smuzhiyun { 49*4882a593Smuzhiyun return array->size; 50*4882a593Smuzhiyun } 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #endif /* _VMCI_HANDLE_ARRAY_H_ */ 54