1 files changed, 149 insertions, 0 deletions
diff --git a/include/linux/uacce.h b/include/linux/uacce.h
new file mode 100644
index 000000000000..9ce88c28b0a8
--- /dev/null
+++ b/include/linux/uacce.h
@@ -0,0 +1,149 @@
+/* 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
+ * @mutex: protects queue state
+ * @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];
+	struct mutex mutex;
+	enum uacce_q_state state;
+	u32 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
+ * @mutex: protects uacce operation
+ * @priv: private pointer of the uacce
+ * @queues: list of queues
+ * @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;
+	struct mutex mutex;
+	void *priv;
+	struct list_head queues;
+	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 */