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c7b6bac9c7
PASID is defined as a few different types in iommu including "int", "u32", and "unsigned int". To be consistent and to match with uapi definitions, define PASID and its variations (e.g. max PASID) as "u32". "u32" is also shorter and a little more explicit than "unsigned int". No PASID type change in uapi although it defines PASID as __u64 in some places. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Joerg Roedel <jroedel@suse.de> Link: https://lkml.kernel.org/r/1600187413-163670-2-git-send-email-fenghua.yu@intel.com
148 lines
3.7 KiB
C
148 lines
3.7 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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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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*/
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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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};
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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_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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* @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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*/
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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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enum uacce_q_state state;
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u32 pasid;
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struct iommu_sva *handle;
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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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* @priv: private pointer of the uacce
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* @queues: list of queues
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* @queues_lock: lock for queues list
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* @inode: core vfs
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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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void *priv;
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struct list_head queues;
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struct mutex queues_lock;
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struct inode *inode;
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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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