| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Iñaky Pérez-González | 1331 | 95.41% | 1 | 6.67% |
| David Vrabel | 29 | 2.08% | 4 | 26.67% |
| Thomas Pugliese | 29 | 2.08% | 4 | 26.67% |
| Greg Kroah-Hartman | 2 | 0.14% | 2 | 13.33% |
| Rahul Bedarkar | 1 | 0.07% | 1 | 6.67% |
| Justin P. Mattock | 1 | 0.07% | 1 | 6.67% |
| Geliang Tang | 1 | 0.07% | 1 | 6.67% |
| Eric Lescouet | 1 | 0.07% | 1 | 6.67% |
| Total | 1395 | 15 |
// SPDX-License-Identifier: GPL-2.0 /* * Wireless USB Host Controller * Common infrastructure for WHCI and HWA WUSB-HC drivers * * * Copyright (C) 2005-2006 Intel Corporation * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> * * This driver implements parts common to all Wireless USB Host * Controllers (struct wusbhc, embedding a struct usb_hcd) and is used * by: * * - hwahc: HWA, USB-dongle that implements a Wireless USB host * controller, (Wireless USB 1.0 Host-Wire-Adapter specification). * * - whci: WHCI, a PCI card with a wireless host controller * (Wireless Host Controller Interface 1.0 specification). * * Check out the Design-overview.txt file in the source documentation * for other details on the implementation. * * Main blocks: * * rh Root Hub emulation (part of the HCD glue) * * devconnect Handle all the issues related to device connection, * authentication, disconnection, timeout, reseting, * keepalives, etc. * * mmc MMC IE broadcasting handling * * A host controller driver just initializes its stuff and as part of * that, creates a 'struct wusbhc' instance that handles all the * common WUSB mechanisms. Links in the function ops that are specific * to it and then registers the host controller. Ready to run. */ #ifndef __WUSBHC_H__ #define __WUSBHC_H__ #include <linux/usb.h> #include <linux/list.h> #include <linux/mutex.h> #include <linux/kref.h> #include <linux/workqueue.h> #include <linux/usb/hcd.h> #include <linux/uwb.h> #include <linux/usb/wusb.h> /* * Time from a WUSB channel stop request to the last transmitted MMC. * * This needs to be > 4.096 ms in case no MMCs can be transmitted in * zone 0. */ #define WUSB_CHANNEL_STOP_DELAY_MS 8 #define WUSB_RETRY_COUNT_MAX 15 #define WUSB_RETRY_COUNT_INFINITE 0 /** * Wireless USB device * * Describe a WUSB device connected to the cluster. This struct * belongs to the 'struct wusb_port' it is attached to and it is * responsible for putting and clearing the pointer to it. * * Note this "complements" the 'struct usb_device' that the usb_hcd * keeps for each connected USB device. However, it extends some * information that is not available (there is no hcpriv ptr in it!) * *and* most importantly, it's life cycle is different. It is created * as soon as we get a DN_Connect (connect request notification) from * the device through the WUSB host controller; the USB stack doesn't * create the device until we authenticate it. FIXME: this will * change. * * @bos: This is allocated when the BOS descriptors are read from * the device and freed upon the wusb_dev struct dying. * @wusb_cap_descr: points into @bos, and has been verified to be size * safe. */ struct wusb_dev { struct kref refcnt; struct wusbhc *wusbhc; struct list_head cack_node; /* Connect-Ack list */ struct list_head rekey_node; /* GTK rekey list */ u8 port_idx; u8 addr; u8 beacon_type:4; struct usb_encryption_descriptor ccm1_etd; struct wusb_ckhdid cdid; unsigned long entry_ts; struct usb_bos_descriptor *bos; struct usb_wireless_cap_descriptor *wusb_cap_descr; struct uwb_mas_bm availability; struct work_struct devconnect_acked_work; struct usb_device *usb_dev; }; #define WUSB_DEV_ADDR_UNAUTH 0x80 static inline void wusb_dev_init(struct wusb_dev *wusb_dev) { kref_init(&wusb_dev->refcnt); /* no need to init the cack_node */ } extern void wusb_dev_destroy(struct kref *_wusb_dev); static inline struct wusb_dev *wusb_dev_get(struct wusb_dev *wusb_dev) { kref_get(&wusb_dev->refcnt); return wusb_dev; } static inline void wusb_dev_put(struct wusb_dev *wusb_dev) { kref_put(&wusb_dev->refcnt, wusb_dev_destroy); } /** * Wireless USB Host Controller root hub "fake" ports * (state and device information) * * Wireless USB is wireless, so there are no ports; but we * fake'em. Each RC can connect a max of devices at the same time * (given in the Wireless Adapter descriptor, bNumPorts or WHCI's * caps), referred to in wusbhc->ports_max. * * See rh.c for more information. * * The @status and @change use the same bits as in USB2.0[11.24.2.7], * so we don't have to do much when getting the port's status. * * WUSB1.0[7.1], USB2.0[11.24.2.7.1,fig 11-10], * include/linux/usb_ch9.h (#define USB_PORT_STAT_*) */ struct wusb_port { u16 status; u16 change; struct wusb_dev *wusb_dev; /* connected device's info */ u32 ptk_tkid; }; /** * WUSB Host Controller specifics * * All fields that are common to all Wireless USB controller types * (HWA and WHCI) are grouped here. Host Controller * functions/operations that only deal with general Wireless USB HC * issues use this data type to refer to the host. * * @usb_hcd Instantiation of a USB host controller * (initialized by upper layer [HWA=HC or WHCI]. * * @dev Device that implements this; initialized by the * upper layer (HWA-HC, WHCI...); this device should * have a refcount. * * @trust_timeout After this time without hearing for device * activity, we consider the device gone and we have to * re-authenticate. * * Can be accessed w/o locking--however, read to a * local variable then use. * * @chid WUSB Cluster Host ID: this is supposed to be a * unique value that doesn't change across reboots (so * that your devices do not require re-association). * * Read/Write protected by @mutex * * @dev_info This array has ports_max elements. It is used to * give the HC information about the WUSB devices (see * 'struct wusb_dev_info'). * * For HWA we need to allocate it in heap; for WHCI it * needs to be permanently mapped, so we keep it for * both and make it easy. Call wusbhc->dev_info_set() * to update an entry. * * @ports_max Number of simultaneous device connections (fake * ports) this HC will take. Read-only. * * @port Array of port status for each fake root port. Guaranteed to * always be the same length during device existence * [this allows for some unlocked but referenced reading]. * * @mmcies_max Max number of Information Elements this HC can send * in its MMC. Read-only. * * @start Start the WUSB channel. * * @stop Stop the WUSB channel after the specified number of * milliseconds. Channel Stop IEs should be transmitted * as required by [WUSB] 4.16.2.1. * * @mmcie_add HC specific operation (WHCI or HWA) for adding an * MMCIE. * * @mmcie_rm HC specific operation (WHCI or HWA) for removing an * MMCIE. * * @set_ptk: Set the PTK and enable encryption for a device. Or, if * the supplied key is NULL, disable encryption for that * device. * * @set_gtk: Set the GTK to be used for all future broadcast packets * (i.e., MMCs). With some hardware, setting the GTK may start * MMC transmission. * * NOTE: * * - If wusb_dev->usb_dev is not NULL, then usb_dev is valid * (wusb_dev has a refcount on it). Likewise, if usb_dev->wusb_dev * is not NULL, usb_dev->wusb_dev is valid (usb_dev keeps a * refcount on it). * * Most of the times when you need to use it, it will be non-NULL, * so there is no real need to check for it (wusb_dev will * disappear before usb_dev). * * - The following fields need to be filled out before calling * wusbhc_create(): ports_max, mmcies_max, mmcie_{add,rm}. * * - there is no wusbhc_init() method, we do everything in * wusbhc_create(). * * - Creation is done in two phases, wusbhc_create() and * wusbhc_create_b(); b are the parts that need to be called after * calling usb_hcd_add(&wusbhc->usb_hcd). */ struct wusbhc { struct usb_hcd usb_hcd; /* HAS TO BE 1st */ struct device *dev; struct uwb_rc *uwb_rc; struct uwb_pal pal; unsigned trust_timeout; /* in jiffies */ struct wusb_ckhdid chid; uint8_t phy_rate; uint8_t dnts_num_slots; uint8_t dnts_interval; uint8_t retry_count; struct wuie_host_info *wuie_host_info; struct mutex mutex; /* locks everything else */ u16 cluster_id; /* Wireless USB Cluster ID */ struct wusb_port *port; /* Fake port status handling */ struct wusb_dev_info *dev_info; /* for Set Device Info mgmt */ u8 ports_max; unsigned active:1; /* currently xmit'ing MMCs */ struct wuie_keep_alive keep_alive_ie; /* protected by mutex */ struct delayed_work keep_alive_timer; struct list_head cack_list; /* Connect acknowledging */ size_t cack_count; /* protected by 'mutex' */ struct wuie_connect_ack cack_ie; struct uwb_rsv *rsv; /* cluster bandwidth reservation */ struct mutex mmcie_mutex; /* MMC WUIE handling */ struct wuie_hdr **mmcie; /* WUIE array */ u8 mmcies_max; /* FIXME: make wusbhc_ops? */ int (*start)(struct wusbhc *wusbhc); void (*stop)(struct wusbhc *wusbhc, int delay); int (*mmcie_add)(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt, u8 handle, struct wuie_hdr *wuie); int (*mmcie_rm)(struct wusbhc *wusbhc, u8 handle); int (*dev_info_set)(struct wusbhc *, struct wusb_dev *wusb_dev); int (*bwa_set)(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *); int (*set_ptk)(struct wusbhc *wusbhc, u8 port_idx, u32 tkid, const void *key, size_t key_size); int (*set_gtk)(struct wusbhc *wusbhc, u32 tkid, const void *key, size_t key_size); int (*set_num_dnts)(struct wusbhc *wusbhc, u8 interval, u8 slots); struct { struct usb_key_descriptor descr; u8 data[16]; /* GTK key data */ } __attribute__((packed)) gtk; u8 gtk_index; u32 gtk_tkid; /* workqueue for WUSB security related tasks. */ struct workqueue_struct *wq_security; struct work_struct gtk_rekey_work; struct usb_encryption_descriptor *ccm1_etd; }; #define usb_hcd_to_wusbhc(u) container_of((u), struct wusbhc, usb_hcd) extern int wusbhc_create(struct wusbhc *); extern int wusbhc_b_create(struct wusbhc *); extern void wusbhc_b_destroy(struct wusbhc *); extern void wusbhc_destroy(struct wusbhc *); extern int wusb_dev_sysfs_add(struct wusbhc *, struct usb_device *, struct wusb_dev *); extern void wusb_dev_sysfs_rm(struct wusb_dev *); extern int wusbhc_sec_create(struct wusbhc *); extern int wusbhc_sec_start(struct wusbhc *); extern void wusbhc_sec_stop(struct wusbhc *); extern void wusbhc_sec_destroy(struct wusbhc *); extern void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb, int status); void wusbhc_reset_all(struct wusbhc *wusbhc); int wusbhc_pal_register(struct wusbhc *wusbhc); void wusbhc_pal_unregister(struct wusbhc *wusbhc); /* * Return @usb_dev's @usb_hcd (properly referenced) or NULL if gone * * @usb_dev: USB device, UNLOCKED and referenced (or otherwise, safe ptr) * * This is a safe assumption as @usb_dev->bus is referenced all the * time during the @usb_dev life cycle. */ static inline struct usb_hcd *usb_hcd_get_by_usb_dev(struct usb_device *usb_dev) { struct usb_hcd *usb_hcd; usb_hcd = bus_to_hcd(usb_dev->bus); return usb_get_hcd(usb_hcd); } /* * Increment the reference count on a wusbhc. * * @wusbhc's life cycle is identical to that of the underlying usb_hcd. */ static inline struct wusbhc *wusbhc_get(struct wusbhc *wusbhc) { return usb_get_hcd(&wusbhc->usb_hcd) ? wusbhc : NULL; } /* * Return the wusbhc associated to a @usb_dev * * @usb_dev: USB device, UNLOCKED and referenced (or otherwise, safe ptr) * * @returns: wusbhc for @usb_dev; NULL if the @usb_dev is being torn down. * WARNING: referenced at the usb_hcd level, unlocked * * FIXME: move offline */ static inline struct wusbhc *wusbhc_get_by_usb_dev(struct usb_device *usb_dev) { struct wusbhc *wusbhc = NULL; struct usb_hcd *usb_hcd; if (usb_dev->devnum > 1 && !usb_dev->wusb) { /* but root hubs */ dev_err(&usb_dev->dev, "devnum %d wusb %d\n", usb_dev->devnum, usb_dev->wusb); BUG_ON(usb_dev->devnum > 1 && !usb_dev->wusb); } usb_hcd = usb_hcd_get_by_usb_dev(usb_dev); if (usb_hcd == NULL) return NULL; BUG_ON(usb_hcd->wireless == 0); return wusbhc = usb_hcd_to_wusbhc(usb_hcd); } static inline void wusbhc_put(struct wusbhc *wusbhc) { usb_put_hcd(&wusbhc->usb_hcd); } int wusbhc_start(struct wusbhc *wusbhc); void wusbhc_stop(struct wusbhc *wusbhc); extern int wusbhc_chid_set(struct wusbhc *, const struct wusb_ckhdid *); /* Device connect handling */ extern int wusbhc_devconnect_create(struct wusbhc *); extern void wusbhc_devconnect_destroy(struct wusbhc *); extern int wusbhc_devconnect_start(struct wusbhc *wusbhc); extern void wusbhc_devconnect_stop(struct wusbhc *wusbhc); extern void wusbhc_handle_dn(struct wusbhc *, u8 srcaddr, struct wusb_dn_hdr *dn_hdr, size_t size); extern void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port); extern int wusb_usb_ncb(struct notifier_block *nb, unsigned long val, void *priv); extern int wusb_set_dev_addr(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev, u8 addr); /* Wireless USB fake Root Hub methods */ extern int wusbhc_rh_create(struct wusbhc *); extern void wusbhc_rh_destroy(struct wusbhc *); extern int wusbhc_rh_status_data(struct usb_hcd *, char *); extern int wusbhc_rh_control(struct usb_hcd *, u16, u16, u16, char *, u16); extern int wusbhc_rh_start_port_reset(struct usb_hcd *, unsigned); /* MMC handling */ extern int wusbhc_mmcie_create(struct wusbhc *); extern void wusbhc_mmcie_destroy(struct wusbhc *); extern int wusbhc_mmcie_set(struct wusbhc *, u8 interval, u8 repeat_cnt, struct wuie_hdr *); extern void wusbhc_mmcie_rm(struct wusbhc *, struct wuie_hdr *); /* Bandwidth reservation */ int wusbhc_rsv_establish(struct wusbhc *wusbhc); void wusbhc_rsv_terminate(struct wusbhc *wusbhc); /* * I've always said * I wanted a wedding in a church... * * but lately I've been thinking about * the Botanical Gardens. * * We could do it by the tulips. * It'll be beautiful * * --Security! */ extern int wusb_dev_sec_add(struct wusbhc *, struct usb_device *, struct wusb_dev *); extern void wusb_dev_sec_rm(struct wusb_dev *) ; extern int wusb_dev_4way_handshake(struct wusbhc *, struct wusb_dev *, struct wusb_ckhdid *ck); void wusbhc_gtk_rekey(struct wusbhc *wusbhc); int wusb_dev_update_address(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev); /* WUSB Cluster ID handling */ extern u8 wusb_cluster_id_get(void); extern void wusb_cluster_id_put(u8); /* * wusb_port_by_idx - return the port associated to a zero-based port index * * NOTE: valid without locking as long as wusbhc is referenced (as the * number of ports doesn't change). The data pointed to has to * be verified though :) */ static inline struct wusb_port *wusb_port_by_idx(struct wusbhc *wusbhc, u8 port_idx) { return &wusbhc->port[port_idx]; } /* * wusb_port_no_to_idx - Convert port number (per usb_dev->portnum) to * a port_idx. * * USB stack USB ports are 1 based!! * * NOTE: only valid for WUSB devices!!! */ static inline u8 wusb_port_no_to_idx(u8 port_no) { return port_no - 1; } extern struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *, struct usb_device *); /* * Return a referenced wusb_dev given a @usb_dev * * Returns NULL if the usb_dev is being torn down. * * FIXME: move offline */ static inline struct wusb_dev *wusb_dev_get_by_usb_dev(struct usb_device *usb_dev) { struct wusbhc *wusbhc; struct wusb_dev *wusb_dev; wusbhc = wusbhc_get_by_usb_dev(usb_dev); if (wusbhc == NULL) return NULL; mutex_lock(&wusbhc->mutex); wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev); mutex_unlock(&wusbhc->mutex); wusbhc_put(wusbhc); return wusb_dev; } /* Misc */ extern struct workqueue_struct *wusbd; #endif /* #ifndef __WUSBHC_H__ */
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