1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _LINUX_UACCE_H
#define _LINUX_UACCE_H
#include <linux/cdev.h>
#include <uapi/misc/uacce/uacce.h>
#define UACCE_NAME "uacce"
#define UACCE_MAX_REGION 2
#define UACCE_MAX_NAME_SIZE 64
#define UACCE_MAX_ERR_THRESHOLD 65535
struct uacce_queue;
struct uacce_device;
/**
* struct uacce_qfile_region - structure of queue file region
* @type: type of the region
*/
struct uacce_qfile_region {
enum uacce_qfrt type;
};
/**
* struct uacce_ops - uacce device operations
* @get_available_instances: get available instances left of the device
* @get_queue: get a queue from the device
* @put_queue: free a queue to the device
* @start_queue: make the queue start work after get_queue
* @stop_queue: make the queue stop work before put_queue
* @is_q_updated: check whether the task is finished
* @mmap: mmap addresses of queue to user space
* @ioctl: ioctl for user space users of the queue
* @get_isolate_state: get the device state after set the isolate strategy
* @isolate_err_threshold_write: stored the isolate error threshold to the device
* @isolate_err_threshold_read: read the isolate error threshold value from the device
*/
struct uacce_ops {
int (*get_available_instances)(struct uacce_device *uacce);
int (*get_queue)(struct uacce_device *uacce, unsigned long arg,
struct uacce_queue *q);
void (*put_queue)(struct uacce_queue *q);
int (*start_queue)(struct uacce_queue *q);
void (*stop_queue)(struct uacce_queue *q);
int (*is_q_updated)(struct uacce_queue *q);
int (*mmap)(struct uacce_queue *q, struct vm_area_struct *vma,
struct uacce_qfile_region *qfr);
long (*ioctl)(struct uacce_queue *q, unsigned int cmd,
unsigned long arg);
enum uacce_dev_state (*get_isolate_state)(struct uacce_device *uacce);
int (*isolate_err_threshold_write)(struct uacce_device *uacce, u32 num);
u32 (*isolate_err_threshold_read)(struct uacce_device *uacce);
};
/**
* struct uacce_interface - interface required for uacce_register()
* @name: the uacce device name. Will show up in sysfs
* @flags: uacce device attributes
* @ops: pointer to the struct uacce_ops
*/
struct uacce_interface {
char name[UACCE_MAX_NAME_SIZE];
unsigned int flags;
const struct uacce_ops *ops;
};
enum uacce_dev_state {
UACCE_DEV_NORMAL,
UACCE_DEV_ISOLATE,
};
enum uacce_q_state {
UACCE_Q_ZOMBIE = 0,
UACCE_Q_INIT,
UACCE_Q_STARTED,
};
/**
* struct uacce_queue
* @uacce: pointer to uacce
* @priv: private pointer
* @wait: wait queue head
* @list: index into uacce queues list
* @qfrs: pointer of qfr regions
* @mutex: protects queue state
* @state: queue state machine
* @pasid: pasid associated to the mm
* @handle: iommu_sva handle returned by iommu_sva_bind_device()
* @mapping: user space mapping of the queue
*/
struct uacce_queue {
struct uacce_device *uacce;
void *priv;
wait_queue_head_t wait;
struct list_head list;
struct uacce_qfile_region *qfrs[UACCE_MAX_REGION];
struct mutex mutex;
enum uacce_q_state state;
u32 pasid;
struct iommu_sva *handle;
struct address_space *mapping;
};
/**
* struct uacce_device
* @algs: supported algorithms
* @api_ver: api version
* @ops: pointer to the struct uacce_ops
* @qf_pg_num: page numbers of the queue file regions
* @parent: pointer to the parent device
* @is_vf: whether virtual function
* @flags: uacce attributes
* @dev_id: id of the uacce device
* @cdev: cdev of the uacce
* @dev: dev of the uacce
* @mutex: protects uacce operation
* @priv: private pointer of the uacce
* @queues: list of queues
*/
struct uacce_device {
const char *algs;
const char *api_ver;
const struct uacce_ops *ops;
unsigned long qf_pg_num[UACCE_MAX_REGION];
struct device *parent;
bool is_vf;
u32 flags;
u32 dev_id;
struct cdev *cdev;
struct device dev;
struct mutex mutex;
void *priv;
struct list_head queues;
};
#if IS_ENABLED(CONFIG_UACCE)
struct uacce_device *uacce_alloc(struct device *parent,
struct uacce_interface *interface);
int uacce_register(struct uacce_device *uacce);
void uacce_remove(struct uacce_device *uacce);
#else /* CONFIG_UACCE */
static inline
struct uacce_device *uacce_alloc(struct device *parent,
struct uacce_interface *interface)
{
return ERR_PTR(-ENODEV);
}
static inline int uacce_register(struct uacce_device *uacce)
{
return -EINVAL;
}
static inline void uacce_remove(struct uacce_device *uacce) {}
#endif /* CONFIG_UACCE */
#endif /* _LINUX_UACCE_H */
|
