mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 15:15:15 +07:00
fb01562e5a
The mm_exit() op will be removed from the SVA API. When a process dies and its mm goes away, the IOMMU driver won't notify device drivers anymore. Drivers should expect to handle a lot more aborted DMA. On the upside, it does greatly simplify the queue management. The uacce_mm struct, that tracks all queues bound to an mm, was only used by the mm_exit() callback. Remove it. Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Link: https://lore.kernel.org/r/20200423125329.782066-2-jean-philippe@linaro.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/* 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
|
|
|
|
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
|
|
*/
|
|
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);
|
|
};
|
|
|
|
/**
|
|
* 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_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
|
|
* @state: queue state machine
|
|
* @pasid: pasid associated to the mm
|
|
* @handle: iommu_sva handle returned by iommu_sva_bind_device()
|
|
*/
|
|
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];
|
|
enum uacce_q_state state;
|
|
int pasid;
|
|
struct iommu_sva *handle;
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
* @priv: private pointer of the uacce
|
|
* @queues: list of queues
|
|
* @queues_lock: lock for queues list
|
|
* @inode: core vfs
|
|
*/
|
|
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;
|
|
void *priv;
|
|
struct list_head queues;
|
|
struct mutex queues_lock;
|
|
struct inode *inode;
|
|
};
|
|
|
|
#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 */
|