cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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usnic_uiom.h (3003B)

      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 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.
     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
     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[];
     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_ */