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1/*2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * 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 42struct ib_ucontext;43 44#define USNIC_UIOM_READ (1)45#define USNIC_UIOM_WRITE (2)46 47#define USNIC_UIOM_MAX_PD_CNT (1000)48#define USNIC_UIOM_MAX_MR_CNT (1000000)49#define USNIC_UIOM_MAX_MR_SIZE (~0UL)50#define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE)51 52struct usnic_uiom_dev {53 struct device *dev;54 struct list_head link;55};56 57struct usnic_uiom_pd {58 struct iommu_domain *domain;59 spinlock_t lock;60 struct rb_root_cached root;61 struct list_head devs;62 int dev_cnt;63};64 65struct usnic_uiom_reg {66 struct usnic_uiom_pd *pd;67 unsigned long va;68 size_t length;69 int offset;70 int page_size;71 int writable;72 struct list_head chunk_list;73 struct work_struct work;74 struct mm_struct *owning_mm;75};76 77struct usnic_uiom_chunk {78 struct list_head list;79 int nents;80 struct scatterlist page_list[] __counted_by(nents);81};82 83struct usnic_uiom_pd *usnic_uiom_alloc_pd(struct device *dev);84void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd);85int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev);86void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd,87 struct device *dev);88struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd);89void usnic_uiom_free_dev_list(struct device **devs);90struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd,91 unsigned long addr, size_t size,92 int access, int dmasync);93void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr);94#endif /* USNIC_UIOM_H_ */95