162 lines
4.4 KiB
C
162 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_UACCE_H
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#define _LINUX_UACCE_H
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#include <linux/cdev.h>
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#include <uapi/misc/uacce/uacce.h>
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#define UACCE_NAME "uacce"
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#define UACCE_MAX_REGION 2
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#define UACCE_MAX_NAME_SIZE 64
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#define UACCE_MAX_ERR_THRESHOLD 65535
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struct uacce_queue;
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struct uacce_device;
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/**
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* struct uacce_qfile_region - structure of queue file region
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* @type: type of the region
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*/
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struct uacce_qfile_region {
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enum uacce_qfrt type;
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};
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/**
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* struct uacce_ops - uacce device operations
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* @get_available_instances: get available instances left of the device
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* @get_queue: get a queue from the device
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* @put_queue: free a queue to the device
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* @start_queue: make the queue start work after get_queue
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* @stop_queue: make the queue stop work before put_queue
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* @is_q_updated: check whether the task is finished
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* @mmap: mmap addresses of queue to user space
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* @ioctl: ioctl for user space users of the queue
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* @get_isolate_state: get the device state after set the isolate strategy
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* @isolate_err_threshold_write: stored the isolate error threshold to the device
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* @isolate_err_threshold_read: read the isolate error threshold value from the device
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*/
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struct uacce_ops {
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int (*get_available_instances)(struct uacce_device *uacce);
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int (*get_queue)(struct uacce_device *uacce, unsigned long arg,
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struct uacce_queue *q);
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void (*put_queue)(struct uacce_queue *q);
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int (*start_queue)(struct uacce_queue *q);
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void (*stop_queue)(struct uacce_queue *q);
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int (*is_q_updated)(struct uacce_queue *q);
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int (*mmap)(struct uacce_queue *q, struct vm_area_struct *vma,
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struct uacce_qfile_region *qfr);
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long (*ioctl)(struct uacce_queue *q, unsigned int cmd,
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unsigned long arg);
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enum uacce_dev_state (*get_isolate_state)(struct uacce_device *uacce);
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int (*isolate_err_threshold_write)(struct uacce_device *uacce, u32 num);
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u32 (*isolate_err_threshold_read)(struct uacce_device *uacce);
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};
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/**
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* struct uacce_interface - interface required for uacce_register()
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* @name: the uacce device name. Will show up in sysfs
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* @flags: uacce device attributes
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* @ops: pointer to the struct uacce_ops
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*/
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struct uacce_interface {
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char name[UACCE_MAX_NAME_SIZE];
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unsigned int flags;
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const struct uacce_ops *ops;
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};
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enum uacce_dev_state {
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UACCE_DEV_NORMAL,
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UACCE_DEV_ISOLATE,
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};
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enum uacce_q_state {
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UACCE_Q_ZOMBIE = 0,
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UACCE_Q_INIT,
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UACCE_Q_STARTED,
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};
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/**
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* struct uacce_queue
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* @uacce: pointer to uacce
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* @priv: private pointer
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* @wait: wait queue head
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* @list: index into uacce queues list
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* @qfrs: pointer of qfr regions
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* @mutex: protects queue state
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* @state: queue state machine
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* @pasid: pasid associated to the mm
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* @handle: iommu_sva handle returned by iommu_sva_bind_device()
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* @mapping: user space mapping of the queue
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*/
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struct uacce_queue {
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struct uacce_device *uacce;
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void *priv;
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wait_queue_head_t wait;
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struct list_head list;
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struct uacce_qfile_region *qfrs[UACCE_MAX_REGION];
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struct mutex mutex;
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enum uacce_q_state state;
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u32 pasid;
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struct iommu_sva *handle;
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struct address_space *mapping;
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};
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/**
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* struct uacce_device
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* @algs: supported algorithms
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* @api_ver: api version
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* @ops: pointer to the struct uacce_ops
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* @qf_pg_num: page numbers of the queue file regions
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* @parent: pointer to the parent device
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* @is_vf: whether virtual function
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* @flags: uacce attributes
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* @dev_id: id of the uacce device
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* @cdev: cdev of the uacce
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* @dev: dev of the uacce
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* @mutex: protects uacce operation
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* @priv: private pointer of the uacce
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* @queues: list of queues
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*/
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struct uacce_device {
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const char *algs;
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const char *api_ver;
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const struct uacce_ops *ops;
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unsigned long qf_pg_num[UACCE_MAX_REGION];
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struct device *parent;
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bool is_vf;
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u32 flags;
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u32 dev_id;
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struct cdev *cdev;
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struct device dev;
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struct mutex mutex;
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void *priv;
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struct list_head queues;
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};
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#if IS_ENABLED(CONFIG_UACCE)
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struct uacce_device *uacce_alloc(struct device *parent,
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struct uacce_interface *interface);
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int uacce_register(struct uacce_device *uacce);
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void uacce_remove(struct uacce_device *uacce);
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#else /* CONFIG_UACCE */
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static inline
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struct uacce_device *uacce_alloc(struct device *parent,
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struct uacce_interface *interface)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline int uacce_register(struct uacce_device *uacce)
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{
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return -EINVAL;
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}
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static inline void uacce_remove(struct uacce_device *uacce) {}
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#endif /* CONFIG_UACCE */
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#endif /* _LINUX_UACCE_H */
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