LXR linux/drivers/misc/ocxl/ocxl

   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        2000
  12#define MAX_IRQ_PER_CONTEXT     MAX_IRQ_PER_LINK
  13
  14#define to_ocxl_function(d) container_of(d, struct ocxl_fn, dev)
  15#define to_ocxl_afu(d) container_of(d, struct ocxl_afu, dev)
  16
  17extern struct pci_driver ocxl_pci_driver;
  18
  19
  20struct ocxl_fn {
  21        struct device dev;
  22        int bar_used[3];
  23        struct ocxl_fn_config config;
  24        struct list_head afu_list;
  25        int pasid_base;
  26        int actag_base;
  27        int actag_enabled;
  28        int actag_supported;
  29        struct list_head pasid_list;
  30        struct list_head actag_list;
  31        void *link;
  32};
  33
  34struct ocxl_afu {
  35        struct ocxl_fn *fn;
  36        struct list_head list;
  37        struct device dev;
  38        struct cdev cdev;
  39        struct ocxl_afu_config config;
  40        int pasid_base;
  41        int pasid_count; /* opened contexts */
  42        int pasid_max; /* maximum number of contexts */
  43        int actag_base;
  44        int actag_enabled;
  45        struct mutex contexts_lock;
  46        struct idr contexts_idr;
  47        struct mutex afu_control_lock;
  48        u64 global_mmio_start;
  49        u64 irq_base_offset;
  50        void __iomem *global_mmio_ptr;
  51        u64 pp_mmio_start;
  52        struct bin_attribute attr_global_mmio;
  53};
  54
  55enum ocxl_context_status {
  56        CLOSED,
  57        OPENED,
  58        ATTACHED,
  59};
  60
  61// Contains metadata about a translation fault
  62struct ocxl_xsl_error {
  63        u64 addr; // The address that triggered the fault
  64        u64 dsisr; // the value of the dsisr register
  65        u64 count; // The number of times this fault has been triggered
  66};
  67
  68struct ocxl_context {
  69        struct ocxl_afu *afu;
  70        int pasid;
  71        struct mutex status_mutex;
  72        enum ocxl_context_status status;
  73        struct address_space *mapping;
  74        struct mutex mapping_lock;
  75        wait_queue_head_t events_wq;
  76        struct mutex xsl_error_lock;
  77        struct ocxl_xsl_error xsl_error;
  78        struct mutex irq_lock;
  79        struct idr irq_idr;
  80};
  81
  82struct ocxl_process_element {
  83        __be64 config_state;
  84        __be32 reserved1[11];
  85        __be32 lpid;
  86        __be32 tid;
  87        __be32 pid;
  88        __be32 reserved2[10];
  89        __be64 amr;
  90        __be32 reserved3[3];
  91        __be32 software_state;
  92};
  93
  94
  95extern struct ocxl_afu *ocxl_afu_get(struct ocxl_afu *afu);
  96extern void ocxl_afu_put(struct ocxl_afu *afu);
  97
  98extern int ocxl_create_cdev(struct ocxl_afu *afu);
  99extern void ocxl_destroy_cdev(struct ocxl_afu *afu);
 100extern int ocxl_register_afu(struct ocxl_afu *afu);
 101extern void ocxl_unregister_afu(struct ocxl_afu *afu);
 102
 103extern int ocxl_file_init(void);
 104extern void ocxl_file_exit(void);
 105
 106extern int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);
 107extern void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
 108extern int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);
 109extern void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
 110
 111extern struct ocxl_context *ocxl_context_alloc(void);
 112extern int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
 113                        struct address_space *mapping);
 114extern int ocxl_context_attach(struct ocxl_context *ctx, u64 amr);
 115extern int ocxl_context_mmap(struct ocxl_context *ctx,
 116                        struct vm_area_struct *vma);
 117extern int ocxl_context_detach(struct ocxl_context *ctx);
 118extern void ocxl_context_detach_all(struct ocxl_afu *afu);
 119extern void ocxl_context_free(struct ocxl_context *ctx);
 120
 121extern int ocxl_sysfs_add_afu(struct ocxl_afu *afu);
 122extern void ocxl_sysfs_remove_afu(struct ocxl_afu *afu);
 123
 124extern int ocxl_afu_irq_alloc(struct ocxl_context *ctx, u64 *irq_offset);
 125extern int ocxl_afu_irq_free(struct ocxl_context *ctx, u64 irq_offset);
 126extern void ocxl_afu_irq_free_all(struct ocxl_context *ctx);
 127extern int ocxl_afu_irq_set_fd(struct ocxl_context *ctx, u64 irq_offset,
 128                        int eventfd);
 129extern u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, u64 irq_offset);
 130
 131#endif /* _OCXL_INTERNAL_H_ */
 132