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linux/drivers/usb/wusbcore/wusbhc.h
David Vrabel 6fae35f9ce uwb: add basic radio manager 
The UWB radio manager coordinates the use of the radio between the
PALs that may be using it.  PALs request use of the radio with
uwb_radio_start() and the radio manager will start beaconing if its
not already doing so.  When the last PAL has called uwb_radio_stop()
beaconing will be stopped.

In the future, the radio manager will have a more sophisticated channel
selection algorithm, probably following the Channel Selection Policy
from the WiMedia Alliance when it is finalized.  For now, channel 9
(BG1, TFC1) is selected.

The user may override the channel selected by the radio manager and may
force the radio to stop beaconing.

The WUSB Host Controller PAL makes use of this and there are two new
debug PAL commands that can be used for testing.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
2008-11-19 14:46:33 +00:00

497 lines
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/*
* 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 program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*
* 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>
/* FIXME: Yes, I know: BAD--it's not my fault the USB HC iface is not
* public */
#include <linux/../../drivers/usb/core/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
/**
* 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 */
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 urb *set_gtk_urb;
struct usb_ctrlrequest *set_gtk_req;
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 Controlller 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 lenght 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
* dissapear 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;
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;
struct work_struct gtk_rekey_done_work;
int pending_set_gtks;
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 = container_of(usb_dev->bus, struct usb_hcd, self);
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_suspend(struct usb_hcd *);
extern int wusbhc_rh_resume(struct usb_hcd *);
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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