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Diffstat (limited to 'drivers/fpga/dfl-afu.h')
| -rw-r--r-- | drivers/fpga/dfl-afu.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-afu.h b/drivers/fpga/dfl-afu.h new file mode 100644 index 000000000000..0c7630ae3cda --- /dev/null +++ b/drivers/fpga/dfl-afu.h @@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Header file for FPGA Accelerated Function Unit (AFU) Driver + * + * Copyright (C) 2017-2018 Intel Corporation, Inc. + * + * Authors: + * Wu Hao <hao.wu@intel.com> + * Xiao Guangrong <guangrong.xiao@linux.intel.com> + * Joseph Grecco <joe.grecco@intel.com> + * Enno Luebbers <enno.luebbers@intel.com> + * Tim Whisonant <tim.whisonant@intel.com> + * Ananda Ravuri <ananda.ravuri@intel.com> + * Henry Mitchel <henry.mitchel@intel.com> + */ + +#ifndef __DFL_AFU_H +#define __DFL_AFU_H + +#include <linux/mm.h> + +#include "dfl.h" + +/** + * struct dfl_afu_mmio_region - afu mmio region data structure + * + * @index: region index. + * @flags: region flags (access permission). + * @size: region size. + * @offset: region offset from start of the device fd. + * @phys: region's physical address. + * @node: node to add to afu feature dev's region list. + */ +struct dfl_afu_mmio_region { + u32 index; + u32 flags; + u64 size; + u64 offset; + u64 phys; + struct list_head node; +}; + +/** + * struct fpga_afu_dma_region - afu DMA region data structure + * + * @user_addr: region userspace virtual address. + * @length: region length. + * @iova: region IO virtual address. + * @pages: ptr to pages of this region. + * @node: rb tree node. + * @in_use: flag to indicate if this region is in_use. + */ +struct dfl_afu_dma_region { + u64 user_addr; + u64 length; + u64 iova; + struct page **pages; + struct rb_node node; + bool in_use; +}; + +/** + * struct dfl_afu - afu device data structure + * + * @region_cur_offset: current region offset from start to the device fd. + * @num_regions: num of mmio regions. + * @regions: the mmio region linked list of this afu feature device. + * @dma_regions: root of dma regions rb tree. + * @num_umsgs: num of umsgs. + * @pdata: afu platform device's pdata. + */ +struct dfl_afu { + u64 region_cur_offset; + int num_regions; + u8 num_umsgs; + struct list_head regions; + struct rb_root dma_regions; + + struct dfl_feature_platform_data *pdata; +}; + +void afu_mmio_region_init(struct dfl_feature_platform_data *pdata); +int afu_mmio_region_add(struct dfl_feature_platform_data *pdata, + u32 region_index, u64 region_size, u64 phys, u32 flags); +void afu_mmio_region_destroy(struct dfl_feature_platform_data *pdata); +int afu_mmio_region_get_by_index(struct dfl_feature_platform_data *pdata, + u32 region_index, + struct dfl_afu_mmio_region *pregion); +int afu_mmio_region_get_by_offset(struct dfl_feature_platform_data *pdata, + u64 offset, u64 size, + struct dfl_afu_mmio_region *pregion); +void afu_dma_region_init(struct dfl_feature_platform_data *pdata); +void afu_dma_region_destroy(struct dfl_feature_platform_data *pdata); +int afu_dma_map_region(struct dfl_feature_platform_data *pdata, + u64 user_addr, u64 length, u64 *iova); +int afu_dma_unmap_region(struct dfl_feature_platform_data *pdata, u64 iova); +struct dfl_afu_dma_region * +afu_dma_region_find(struct dfl_feature_platform_data *pdata, + u64 iova, u64 size); +#endif /* __DFL_AFU_H */ |