Upinder Malhi | e3cf00d | 2013-09-10 03:38:16 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. |
| 3 | * |
Jeff Squyres | 3805ead | 2015-09-30 13:34:00 -0700 | [diff] [blame] | 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
Upinder Malhi | e3cf00d | 2013-09-10 03:38:16 +0000 | [diff] [blame] | 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #ifndef USNIC_UIOM_H_ |
| 35 | #define USNIC_UIOM_H_ |
| 36 | |
| 37 | #include <linux/list.h> |
| 38 | #include <linux/scatterlist.h> |
| 39 | |
| 40 | #include "usnic_uiom_interval_tree.h" |
| 41 | |
| 42 | #define USNIC_UIOM_READ (1) |
| 43 | #define USNIC_UIOM_WRITE (2) |
| 44 | |
| 45 | #define USNIC_UIOM_MAX_PD_CNT (1000) |
| 46 | #define USNIC_UIOM_MAX_MR_CNT (1000000) |
| 47 | #define USNIC_UIOM_MAX_MR_SIZE (~0UL) |
| 48 | #define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE) |
| 49 | |
| 50 | struct usnic_uiom_dev { |
| 51 | struct device *dev; |
| 52 | struct list_head link; |
| 53 | }; |
| 54 | |
| 55 | struct usnic_uiom_pd { |
| 56 | struct iommu_domain *domain; |
| 57 | spinlock_t lock; |
Davidlohr Bueso | f808c13 | 2017-09-08 16:15:08 -0700 | [diff] [blame^] | 58 | struct rb_root_cached root; |
Upinder Malhi | e3cf00d | 2013-09-10 03:38:16 +0000 | [diff] [blame] | 59 | struct list_head devs; |
| 60 | int dev_cnt; |
| 61 | }; |
| 62 | |
| 63 | struct usnic_uiom_reg { |
| 64 | struct usnic_uiom_pd *pd; |
| 65 | unsigned long va; |
| 66 | size_t length; |
| 67 | int offset; |
| 68 | int page_size; |
| 69 | int writable; |
| 70 | struct list_head chunk_list; |
| 71 | struct work_struct work; |
| 72 | struct mm_struct *mm; |
| 73 | unsigned long diff; |
| 74 | }; |
| 75 | |
| 76 | struct usnic_uiom_chunk { |
| 77 | struct list_head list; |
| 78 | int nents; |
| 79 | struct scatterlist page_list[0]; |
| 80 | }; |
| 81 | |
| 82 | struct usnic_uiom_pd *usnic_uiom_alloc_pd(void); |
| 83 | void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd); |
| 84 | int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev); |
| 85 | void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd, |
| 86 | struct device *dev); |
| 87 | struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd); |
| 88 | void usnic_uiom_free_dev_list(struct device **devs); |
| 89 | struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd, |
| 90 | unsigned long addr, size_t size, |
| 91 | int access, int dmasync); |
| 92 | void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr, int closing); |
| 93 | int usnic_uiom_init(char *drv_name); |
| 94 | void usnic_uiom_fini(void); |
| 95 | #endif /* USNIC_UIOM_H_ */ |