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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dfl-afu.h (3322B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Header file for FPGA Accelerated Function Unit (AFU) Driver
      4 *
      5 * Copyright (C) 2017-2018 Intel Corporation, Inc.
      6 *
      7 * Authors:
      8 *     Wu Hao <hao.wu@intel.com>
      9 *     Xiao Guangrong <guangrong.xiao@linux.intel.com>
     10 *     Joseph Grecco <joe.grecco@intel.com>
     11 *     Enno Luebbers <enno.luebbers@intel.com>
     12 *     Tim Whisonant <tim.whisonant@intel.com>
     13 *     Ananda Ravuri <ananda.ravuri@intel.com>
     14 *     Henry Mitchel <henry.mitchel@intel.com>
     15 */
     16
     17#ifndef __DFL_AFU_H
     18#define __DFL_AFU_H
     19
     20#include <linux/mm.h>
     21
     22#include "dfl.h"
     23
     24/**
     25 * struct dfl_afu_mmio_region - afu mmio region data structure
     26 *
     27 * @index: region index.
     28 * @flags: region flags (access permission).
     29 * @size: region size.
     30 * @offset: region offset from start of the device fd.
     31 * @phys: region's physical address.
     32 * @node: node to add to afu feature dev's region list.
     33 */
     34struct dfl_afu_mmio_region {
     35	u32 index;
     36	u32 flags;
     37	u64 size;
     38	u64 offset;
     39	u64 phys;
     40	struct list_head node;
     41};
     42
     43/**
     44 * struct fpga_afu_dma_region - afu DMA region data structure
     45 *
     46 * @user_addr: region userspace virtual address.
     47 * @length: region length.
     48 * @iova: region IO virtual address.
     49 * @pages: ptr to pages of this region.
     50 * @node: rb tree node.
     51 * @in_use: flag to indicate if this region is in_use.
     52 */
     53struct dfl_afu_dma_region {
     54	u64 user_addr;
     55	u64 length;
     56	u64 iova;
     57	struct page **pages;
     58	struct rb_node node;
     59	bool in_use;
     60};
     61
     62/**
     63 * struct dfl_afu - afu device data structure
     64 *
     65 * @region_cur_offset: current region offset from start to the device fd.
     66 * @num_regions: num of mmio regions.
     67 * @regions: the mmio region linked list of this afu feature device.
     68 * @dma_regions: root of dma regions rb tree.
     69 * @num_umsgs: num of umsgs.
     70 * @pdata: afu platform device's pdata.
     71 */
     72struct dfl_afu {
     73	u64 region_cur_offset;
     74	int num_regions;
     75	u8 num_umsgs;
     76	struct list_head regions;
     77	struct rb_root dma_regions;
     78
     79	struct dfl_feature_platform_data *pdata;
     80};
     81
     82/* hold pdata->lock when call __afu_port_enable/disable */
     83int __afu_port_enable(struct platform_device *pdev);
     84int __afu_port_disable(struct platform_device *pdev);
     85
     86void afu_mmio_region_init(struct dfl_feature_platform_data *pdata);
     87int afu_mmio_region_add(struct dfl_feature_platform_data *pdata,
     88			u32 region_index, u64 region_size, u64 phys, u32 flags);
     89void afu_mmio_region_destroy(struct dfl_feature_platform_data *pdata);
     90int afu_mmio_region_get_by_index(struct dfl_feature_platform_data *pdata,
     91				 u32 region_index,
     92				 struct dfl_afu_mmio_region *pregion);
     93int afu_mmio_region_get_by_offset(struct dfl_feature_platform_data *pdata,
     94				  u64 offset, u64 size,
     95				  struct dfl_afu_mmio_region *pregion);
     96void afu_dma_region_init(struct dfl_feature_platform_data *pdata);
     97void afu_dma_region_destroy(struct dfl_feature_platform_data *pdata);
     98int afu_dma_map_region(struct dfl_feature_platform_data *pdata,
     99		       u64 user_addr, u64 length, u64 *iova);
    100int afu_dma_unmap_region(struct dfl_feature_platform_data *pdata, u64 iova);
    101struct dfl_afu_dma_region *
    102afu_dma_region_find(struct dfl_feature_platform_data *pdata,
    103		    u64 iova, u64 size);
    104
    105extern const struct dfl_feature_ops port_err_ops;
    106extern const struct dfl_feature_id port_err_id_table[];
    107extern const struct attribute_group port_err_group;
    108
    109#endif /* __DFL_AFU_H */