1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * This software is available to you under a choice of one of two 5*4882a593Smuzhiyun * licenses. You may choose to be licensed under the terms of the GNU 6*4882a593Smuzhiyun * General Public License (GPL) Version 2, available from the file 7*4882a593Smuzhiyun * COPYING in the main directory of this source tree, or the 8*4882a593Smuzhiyun * BSD license below: 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or 11*4882a593Smuzhiyun * without modification, are permitted provided that the following 12*4882a593Smuzhiyun * conditions are met: 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * - Redistributions of source code must retain the above 15*4882a593Smuzhiyun * copyright notice, this list of conditions and the following 16*4882a593Smuzhiyun * disclaimer. 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above 19*4882a593Smuzhiyun * copyright notice, this list of conditions and the following 20*4882a593Smuzhiyun * disclaimer in the documentation and/or other materials 21*4882a593Smuzhiyun * provided with the distribution. 22*4882a593Smuzhiyun * 23*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30*4882a593Smuzhiyun * SOFTWARE. 31*4882a593Smuzhiyun * 32*4882a593Smuzhiyun */ 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #ifndef USNIC_UIOM_H_ 35*4882a593Smuzhiyun #define USNIC_UIOM_H_ 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #include <linux/list.h> 38*4882a593Smuzhiyun #include <linux/scatterlist.h> 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #include "usnic_uiom_interval_tree.h" 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun struct ib_ucontext; 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #define USNIC_UIOM_READ (1) 45*4882a593Smuzhiyun #define USNIC_UIOM_WRITE (2) 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #define USNIC_UIOM_MAX_PD_CNT (1000) 48*4882a593Smuzhiyun #define USNIC_UIOM_MAX_MR_CNT (1000000) 49*4882a593Smuzhiyun #define USNIC_UIOM_MAX_MR_SIZE (~0UL) 50*4882a593Smuzhiyun #define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE) 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun struct usnic_uiom_dev { 53*4882a593Smuzhiyun struct device *dev; 54*4882a593Smuzhiyun struct list_head link; 55*4882a593Smuzhiyun }; 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun struct usnic_uiom_pd { 58*4882a593Smuzhiyun struct iommu_domain *domain; 59*4882a593Smuzhiyun spinlock_t lock; 60*4882a593Smuzhiyun struct rb_root_cached root; 61*4882a593Smuzhiyun struct list_head devs; 62*4882a593Smuzhiyun int dev_cnt; 63*4882a593Smuzhiyun }; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun struct usnic_uiom_reg { 66*4882a593Smuzhiyun struct usnic_uiom_pd *pd; 67*4882a593Smuzhiyun unsigned long va; 68*4882a593Smuzhiyun size_t length; 69*4882a593Smuzhiyun int offset; 70*4882a593Smuzhiyun int page_size; 71*4882a593Smuzhiyun int writable; 72*4882a593Smuzhiyun struct list_head chunk_list; 73*4882a593Smuzhiyun struct work_struct work; 74*4882a593Smuzhiyun struct mm_struct *owning_mm; 75*4882a593Smuzhiyun }; 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun struct usnic_uiom_chunk { 78*4882a593Smuzhiyun struct list_head list; 79*4882a593Smuzhiyun int nents; 80*4882a593Smuzhiyun struct scatterlist page_list[]; 81*4882a593Smuzhiyun }; 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun struct usnic_uiom_pd *usnic_uiom_alloc_pd(void); 84*4882a593Smuzhiyun void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd); 85*4882a593Smuzhiyun int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev); 86*4882a593Smuzhiyun void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd, 87*4882a593Smuzhiyun struct device *dev); 88*4882a593Smuzhiyun struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd); 89*4882a593Smuzhiyun void usnic_uiom_free_dev_list(struct device **devs); 90*4882a593Smuzhiyun struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd, 91*4882a593Smuzhiyun unsigned long addr, size_t size, 92*4882a593Smuzhiyun int access, int dmasync); 93*4882a593Smuzhiyun void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr); 94*4882a593Smuzhiyun int usnic_uiom_init(char *drv_name); 95*4882a593Smuzhiyun #endif /* USNIC_UIOM_H_ */ 96