/* 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 */
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