Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 000000000..0c7630ae3
--- /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 */