1 /* SPDX-License-Identifier: GPL-2.0+ */
2 // Copyright 2017 IBM Corp.
3 #ifndef _OCXL_INTERNAL_H_
4 #define _OCXL_INTERNAL_H_
7 #include <linux/cdev.h>
8 #include <linux/list.h>
11 #define MAX_IRQ_PER_LINK 2000
12 #define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK
14 extern struct pci_driver ocxl_pci_driver;
19 struct ocxl_fn_config config;
20 struct list_head afu_list;
25 struct list_head pasid_list;
26 struct list_head actag_list;
30 struct ocxl_file_info {
34 struct bin_attribute attr_global_mmio;
40 struct list_head list;
41 struct ocxl_afu_config config;
43 int pasid_count; /* opened contexts */
44 int pasid_max; /* maximum number of contexts */
47 struct mutex contexts_lock;
48 struct idr contexts_idr;
49 struct mutex afu_control_lock;
50 u64 global_mmio_start;
52 void __iomem *global_mmio_ptr;
57 enum ocxl_context_status {
63 // Contains metadata about a translation fault
64 struct ocxl_xsl_error {
65 u64 addr; // The address that triggered the fault
66 u64 dsisr; // the value of the dsisr register
67 u64 count; // The number of times this fault has been triggered
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;
82 u16 tidr; // Thread ID used for P9 wait implementation
85 struct ocxl_process_element {
97 __be32 software_state;
100 int ocxl_create_cdev(struct ocxl_afu *afu);
101 void ocxl_destroy_cdev(struct ocxl_afu *afu);
102 int ocxl_file_register_afu(struct ocxl_afu *afu);
103 void ocxl_file_unregister_afu(struct ocxl_afu *afu);
105 int ocxl_file_init(void);
106 void ocxl_file_exit(void);
108 int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);
109 void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
110 int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);
111 void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
114 * Get the max PASID value that can be used by the function
116 int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count);
119 * Control whether the FPGA is reloaded on a link reset
121 int ocxl_config_get_reset_reload(struct pci_dev *dev, int *val);
122 int ocxl_config_set_reset_reload(struct pci_dev *dev, int val);
125 * Check if an AFU index is valid for the given function.
127 * AFU indexes can be sparse, so a driver should check all indexes up
128 * to the maximum found in the function description
130 int ocxl_config_check_afu_index(struct pci_dev *dev,
131 struct ocxl_fn_config *fn, int afu_idx);
134 * ocxl_link_update_pe() - Update values within a Process Element
135 * @link_handle: the link handle associated with the process element
136 * @pasid: the PASID for the AFU context
137 * @tid: the new thread id for the process element
139 * Returns 0 on success
141 int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid);
143 int ocxl_context_mmap(struct ocxl_context *ctx,
144 struct vm_area_struct *vma);
145 void ocxl_context_detach_all(struct ocxl_afu *afu);
147 int ocxl_sysfs_register_afu(struct ocxl_file_info *info);
148 void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info);
150 int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset);
151 u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id);
152 void ocxl_afu_irq_free_all(struct ocxl_context *ctx);
154 #endif /* _OCXL_INTERNAL_H_ */