// SPDX-License-Identifier: GPL-2.0-or-later /* * xen-hcd.c * * Xen USB Virtual Host Controller driver * * Copyright (C) 2009, FUJITSU LABORATORIES LTD. * Author: Noboru Iwamatsu <[email protected]> */ #include <linux/module.h> #include <linux/usb.h> #include <linux/list.h> #include <linux/usb/hcd.h> #include <linux/io.h> #include <xen/xen.h> #include <xen/xenbus.h> #include <xen/grant_table.h> #include <xen/events.h> #include <xen/page.h> #include <xen/interface/io/usbif.h> /* Private per-URB data */ struct urb_priv { … }; /* virtual roothub port status */ struct rhport_status { … }; /* status of attached device */ struct vdevice_status { … }; /* RING request shadow */ struct usb_shadow { … }; struct xenhcd_info { … }; #define XENHCD_RING_JIFFIES … #define XENHCD_SCAN_JIFFIES … enum xenhcd_timer_action { … }; static struct kmem_cache *xenhcd_urbp_cachep; static inline struct xenhcd_info *xenhcd_hcd_to_info(struct usb_hcd *hcd) { … } static inline struct usb_hcd *xenhcd_info_to_hcd(struct xenhcd_info *info) { … } static void xenhcd_set_error(struct xenhcd_info *info, const char *msg) { … } static inline void xenhcd_timer_action_done(struct xenhcd_info *info, enum xenhcd_timer_action action) { … } static void xenhcd_timer_action(struct xenhcd_info *info, enum xenhcd_timer_action action) { … } /* * set virtual port connection status */ static void xenhcd_set_connect_state(struct xenhcd_info *info, int portnum) { … } /* * set virtual device connection status */ static int xenhcd_rhport_connect(struct xenhcd_info *info, __u8 portnum, __u8 speed) { … } /* * SetPortFeature(PORT_SUSPENDED) */ static void xenhcd_rhport_suspend(struct xenhcd_info *info, int portnum) { … } /* * ClearPortFeature(PORT_SUSPENDED) */ static void xenhcd_rhport_resume(struct xenhcd_info *info, int portnum) { … } /* * SetPortFeature(PORT_POWER) */ static void xenhcd_rhport_power_on(struct xenhcd_info *info, int portnum) { … } /* * ClearPortFeature(PORT_POWER) * SetConfiguration(non-zero) * Power_Source_Off * Over-current */ static void xenhcd_rhport_power_off(struct xenhcd_info *info, int portnum) { … } /* * ClearPortFeature(PORT_ENABLE) */ static void xenhcd_rhport_disable(struct xenhcd_info *info, int portnum) { … } /* * SetPortFeature(PORT_RESET) */ static void xenhcd_rhport_reset(struct xenhcd_info *info, int portnum) { … } #ifdef CONFIG_PM static int xenhcd_bus_suspend(struct usb_hcd *hcd) { … } static int xenhcd_bus_resume(struct usb_hcd *hcd) { … } #endif static void xenhcd_hub_descriptor(struct xenhcd_info *info, struct usb_hub_descriptor *desc) { … } /* port status change mask for hub_status_data */ #define PORT_C_MASK … /* * See USB 2.0 Spec, 11.12.4 Hub and Port Status Change Bitmap. * If port status changed, writes the bitmap to buf and return * that length(number of bytes). * If Nothing changed, return 0. */ static int xenhcd_hub_status_data(struct usb_hcd *hcd, char *buf) { … } static int xenhcd_hub_control(struct usb_hcd *hcd, __u16 typeReq, __u16 wValue, __u16 wIndex, char *buf, __u16 wLength) { … } static void xenhcd_free_urb_priv(struct urb_priv *urbp) { … } static inline unsigned int xenhcd_get_id_from_freelist(struct xenhcd_info *info) { … } static inline void xenhcd_add_id_to_freelist(struct xenhcd_info *info, unsigned int id) { … } static inline int xenhcd_count_pages(void *addr, int length) { … } static void xenhcd_gnttab_map(struct xenhcd_info *info, void *addr, int length, grant_ref_t *gref_head, struct xenusb_request_segment *seg, int nr_pages, int flags) { … } static __u32 xenhcd_pipe_urb_to_xenusb(__u32 urb_pipe, __u8 port) { … } static int xenhcd_map_urb_for_request(struct xenhcd_info *info, struct urb *urb, struct xenusb_urb_request *req) { … } static void xenhcd_gnttab_done(struct xenhcd_info *info, unsigned int id) { … } static int xenhcd_translate_status(int status) { … } static void xenhcd_giveback_urb(struct xenhcd_info *info, struct urb *urb, int status) { … } static int xenhcd_do_request(struct xenhcd_info *info, struct urb_priv *urbp) { … } static void xenhcd_kick_pending_urbs(struct xenhcd_info *info) { … } /* * caller must lock info->lock */ static void xenhcd_cancel_all_enqueued_urbs(struct xenhcd_info *info) { … } /* * caller must lock info->lock */ static void xenhcd_giveback_unlinked_urbs(struct xenhcd_info *info) { … } static int xenhcd_submit_urb(struct xenhcd_info *info, struct urb_priv *urbp) { … } static int xenhcd_unlink_urb(struct xenhcd_info *info, struct urb_priv *urbp) { … } static void xenhcd_res_to_urb(struct xenhcd_info *info, struct xenusb_urb_response *res, struct urb *urb) { … } static int xenhcd_urb_request_done(struct xenhcd_info *info, unsigned int *eoiflag) { … } static int xenhcd_conn_notify(struct xenhcd_info *info, unsigned int *eoiflag) { … } static irqreturn_t xenhcd_int(int irq, void *dev_id) { … } static void xenhcd_destroy_rings(struct xenhcd_info *info) { … } static int xenhcd_setup_rings(struct xenbus_device *dev, struct xenhcd_info *info) { … } static int xenhcd_talk_to_backend(struct xenbus_device *dev, struct xenhcd_info *info) { … } static int xenhcd_connect(struct xenbus_device *dev) { … } static void xenhcd_disconnect(struct xenbus_device *dev) { … } static void xenhcd_watchdog(struct timer_list *timer) { … } /* * one-time HC init */ static int xenhcd_setup(struct usb_hcd *hcd) { … } /* * start HC running */ static int xenhcd_run(struct usb_hcd *hcd) { … } /* * stop running HC */ static void xenhcd_stop(struct usb_hcd *hcd) { … } /* * called as .urb_enqueue() * non-error returns are promise to giveback the urb later */ static int xenhcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) { … } /* * called as .urb_dequeue() */ static int xenhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) { … } /* * called from usb_get_current_frame_number(), * but, almost all drivers not use such function. */ static int xenhcd_get_frame(struct usb_hcd *hcd) { … } static struct hc_driver xenhcd_usb20_hc_driver = …; static struct hc_driver xenhcd_usb11_hc_driver = …; static struct usb_hcd *xenhcd_create_hcd(struct xenbus_device *dev) { … } static void xenhcd_backend_changed(struct xenbus_device *dev, enum xenbus_state backend_state) { … } static void xenhcd_remove(struct xenbus_device *dev) { … } static int xenhcd_probe(struct xenbus_device *dev, const struct xenbus_device_id *id) { … } static const struct xenbus_device_id xenhcd_ids[] = …; static struct xenbus_driver xenhcd_driver = …; static int __init xenhcd_init(void) { … } module_init(…) …; static void __exit xenhcd_exit(void) { … } module_exit(xenhcd_exit); MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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