Release 4.7 drivers/infiniband/hw/usnic/usnic_uiom.h
/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_UIOM_H_
#define USNIC_UIOM_H_
#include <linux/list.h>
#include <linux/scatterlist.h>
#include "usnic_uiom_interval_tree.h"
#define USNIC_UIOM_READ (1)
#define USNIC_UIOM_WRITE (2)
#define USNIC_UIOM_MAX_PD_CNT (1000)
#define USNIC_UIOM_MAX_MR_CNT (1000000)
#define USNIC_UIOM_MAX_MR_SIZE (~0UL)
#define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE)
struct usnic_uiom_dev {
struct device *dev;
struct list_head link;
};
struct usnic_uiom_pd {
struct iommu_domain *domain;
spinlock_t lock;
struct rb_root rb_root;
struct list_head devs;
int dev_cnt;
};
struct usnic_uiom_reg {
struct usnic_uiom_pd *pd;
unsigned long va;
size_t length;
int offset;
int page_size;
int writable;
struct list_head chunk_list;
struct work_struct work;
struct mm_struct *mm;
unsigned long diff;
};
struct usnic_uiom_chunk {
struct list_head list;
int nents;
struct scatterlist page_list[0];
};
struct usnic_uiom_pd *usnic_uiom_alloc_pd(void);
void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd);
int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev);
void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd,
struct device *dev);
struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd);
void usnic_uiom_free_dev_list(struct device **devs);
struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd,
unsigned long addr, size_t size,
int access, int dmasync);
void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr, int closing);
int usnic_uiom_init(char *drv_name);
void usnic_uiom_fini(void);
#endif /* USNIC_UIOM_H_ */
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