2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
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
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
37 #include <linux/list.h>
38 #include <linux/scatterlist.h>
40 #include "usnic_uiom_interval_tree.h"
42 #define USNIC_UIOM_READ (1)
43 #define USNIC_UIOM_WRITE (2)
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)
50 struct usnic_uiom_dev {
52 struct list_head link;
55 struct usnic_uiom_pd {
56 struct iommu_domain *domain;
58 struct rb_root rb_root;
59 struct list_head devs;
63 struct usnic_uiom_reg {
64 struct usnic_uiom_pd *pd;
70 struct list_head chunk_list;
71 struct work_struct work;
76 struct usnic_uiom_chunk {
77 struct list_head list;
79 struct scatterlist page_list[0];
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,
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_ */