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