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1/* SPDX-License-Identifier: GPL-2.0+ */2// Copyright 2017 IBM Corp.3#ifndef _OCXL_INTERNAL_H_4#define _OCXL_INTERNAL_H_5 6#include <linux/pci.h>7#include <linux/cdev.h>8#include <linux/list.h>9#include <misc/ocxl.h>10 11#define MAX_IRQ_PER_LINK 200012#define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK13 14extern struct pci_driver ocxl_pci_driver;15 16struct ocxl_fn {17 struct device dev;18 int bar_used[3];19 struct ocxl_fn_config config;20 struct list_head afu_list;21 int pasid_base;22 int actag_base;23 int actag_enabled;24 int actag_supported;25 struct list_head pasid_list;26 struct list_head actag_list;27 void *link;28};29 30struct ocxl_file_info {31 struct ocxl_afu *afu;32 struct device dev;33 struct cdev cdev;34 struct bin_attribute attr_global_mmio;35};36 37struct ocxl_afu {38 struct kref kref;39 struct ocxl_fn *fn;40 struct list_head list;41 struct ocxl_afu_config config;42 int pasid_base;43 int pasid_count; /* opened contexts */44 int pasid_max; /* maximum number of contexts */45 int actag_base;46 int actag_enabled;47 struct mutex contexts_lock;48 struct idr contexts_idr;49 struct mutex afu_control_lock;50 u64 global_mmio_start;51 u64 irq_base_offset;52 void __iomem *global_mmio_ptr;53 u64 pp_mmio_start;54 void *private;55};56 57enum ocxl_context_status {58 CLOSED,59 OPENED,60 ATTACHED,61};62 63// Contains metadata about a translation fault64struct ocxl_xsl_error {65 u64 addr; // The address that triggered the fault66 u64 dsisr; // the value of the dsisr register67 u64 count; // The number of times this fault has been triggered68};69 70struct ocxl_context {71 struct ocxl_afu *afu;72 int pasid;73 struct mutex status_mutex;74 enum ocxl_context_status status;75 struct address_space *mapping;76 struct mutex mapping_lock;77 wait_queue_head_t events_wq;78 struct mutex xsl_error_lock;79 struct ocxl_xsl_error xsl_error;80 struct mutex irq_lock;81 struct idr irq_idr;82 u16 tidr; // Thread ID used for P9 wait implementation83};84 85struct ocxl_process_element {86 __be64 config_state;87 __be32 pasid;88 __be16 bdf;89 __be16 reserved1;90 __be32 reserved2[9];91 __be32 lpid;92 __be32 tid;93 __be32 pid;94 __be32 reserved3[10];95 __be64 amr;96 __be32 reserved4[3];97 __be32 software_state;98};99 100int ocxl_file_register_afu(struct ocxl_afu *afu);101void ocxl_file_unregister_afu(struct ocxl_afu *afu);102 103int ocxl_file_init(void);104void ocxl_file_exit(void);105 106int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);107void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);108int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);109void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size);110 111/*112 * Get the max PASID value that can be used by the function113 */114int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count);115 116/*117 * Control whether the FPGA is reloaded on a link reset118 */119int ocxl_config_get_reset_reload(struct pci_dev *dev, int *val);120int ocxl_config_set_reset_reload(struct pci_dev *dev, int val);121 122/*123 * Check if an AFU index is valid for the given function.124 *125 * AFU indexes can be sparse, so a driver should check all indexes up126 * to the maximum found in the function description127 */128int ocxl_config_check_afu_index(struct pci_dev *dev,129 struct ocxl_fn_config *fn, int afu_idx);130 131/**132 * ocxl_link_update_pe() - Update values within a Process Element133 * @link_handle: the link handle associated with the process element134 * @pasid: the PASID for the AFU context135 * @tid: the new thread id for the process element136 *137 * Returns 0 on success138 */139int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid);140 141int ocxl_context_mmap(struct ocxl_context *ctx,142 struct vm_area_struct *vma);143void ocxl_context_detach_all(struct ocxl_afu *afu);144 145int ocxl_sysfs_register_afu(struct ocxl_file_info *info);146void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info);147 148int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset);149u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id);150void ocxl_afu_irq_free_all(struct ocxl_context *ctx);151 152#endif /* _OCXL_INTERNAL_H_ */153