Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c5995bd2 authored by Stefano Panella's avatar Stefano Panella Committed by David Vrabel
Browse files

uwb: infrastructure for handling Relinquish Request IEs 



The structures and event handler needed to handle Relinish Request IEs
received from neighbors.  Nothing is done with these IEs yet.

Signed-off-by: default avatarStefano Panella <stefano.panella@csr.com>
Signed-off-by: default avatarDavid Vrabel <david.vrabel@csr.com>
parent f88518d1

drivers/uwb/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ uwb-objs := \ 
	drp-ie.o	\

	est.o		\

	ie.o		\

	ie-rcv.o	\

	lc-dev.o	\

	lc-rc.o		\

	neh.o		\

drivers/uwb/ie-rcv.c

0 → 100644
+55 −0
Original line number Diff line number Diff line 
/*

 * Ultra Wide Band

 * IE Received notification handling.

 *

 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */



#include <linux/errno.h>

#include <linux/module.h>

#include <linux/device.h>

#include <linux/bitmap.h>

#include "uwb-internal.h"



/*

 * Process an incoming IE Received notification.

 */

int uwbd_evt_handle_rc_ie_rcv(struct uwb_event *evt)

{

	int result = -EINVAL;

	struct device *dev = &evt->rc->uwb_dev.dev;

	struct uwb_rc_evt_ie_rcv *iercv;

	size_t iesize;



	/* Is there enough data to decode it? */

	if (evt->notif.size < sizeof(*iercv)) {

		dev_err(dev, "IE Received notification: Not enough data to "

			"decode (%zu vs %zu bytes needed)\n",

			evt->notif.size, sizeof(*iercv));

		goto error;

	}

	iercv = container_of(evt->notif.rceb, struct uwb_rc_evt_ie_rcv, rceb);

	iesize = le16_to_cpu(iercv->wIELength);



	dev_dbg(dev, "IE received, element ID=%d\n", iercv->IEData[0]);



	if (iercv->IEData[0] == UWB_RELINQUISH_REQUEST_IE) {

		dev_warn(dev, "unhandled Relinquish Request IE\n");

	}



	return 0;

error:

	return result;

}

drivers/uwb/uwb-internal.h

+1 −0
Original line number Diff line number Diff line
@@ -167,6 +167,7 @@ extern void uwbd_event_queue(struct uwb_event *); 
void uwbd_flush(struct uwb_rc *rc);



/* UWB event handlers */

extern int uwbd_evt_handle_rc_ie_rcv(struct uwb_event *);

extern int uwbd_evt_handle_rc_beacon(struct uwb_event *);

extern int uwbd_evt_handle_rc_beacon_size(struct uwb_event *);

extern int uwbd_evt_handle_rc_bpoie_change(struct uwb_event *);

drivers/uwb/uwbd.c

+4 −0
Original line number Diff line number Diff line
@@ -104,6 +104,10 @@ struct uwbd_event { 
/** Table of handlers for and properties of the UWBD Radio Control Events */

static

struct uwbd_event uwbd_events[] = {

	[UWB_RC_EVT_IE_RCV] = {

		.handler = uwbd_evt_handle_rc_ie_rcv,

		.name = "IE_RECEIVED"

	},

	[UWB_RC_EVT_BEACON] = {

		.handler = uwbd_evt_handle_rc_beacon,

		.name = "BEACON_RECEIVED"

include/linux/uwb/spec.h

+28 −0
Original line number Diff line number Diff line
@@ -200,6 +200,12 @@ enum uwb_drp_reason { 
	UWB_DRP_REASON_MODIFIED,

};



/** Relinquish Request Reason Codes ([ECMA-368] table 113) */

enum uwb_relinquish_req_reason {

	UWB_RELINQUISH_REQ_REASON_NON_SPECIFIC = 0,

	UWB_RELINQUISH_REQ_REASON_OVER_ALLOCATION,

};



/**

 *  DRP Notification Reason Codes (WHCI 0.95 [3.1.4.9])

 */
@@ -252,6 +258,7 @@ enum uwb_ie { 
	UWB_APP_SPEC_PROBE_IE = 15,

	UWB_IDENTIFICATION_IE = 19,

	UWB_MASTER_KEY_ID_IE = 20,

	UWB_RELINQUISH_REQUEST_IE = 21,

	UWB_IE_WLP = 250, /* WiMedia Logical Link Control Protocol WLP 0.99 */

	UWB_APP_SPEC_IE = 255,

};
@@ -365,6 +372,27 @@ struct uwb_ie_drp_avail { 
	DECLARE_BITMAP(bmp, UWB_NUM_MAS);

} __attribute__((packed));



/* Relinqish Request IE ([ECMA-368] section 16.8.19). */

struct uwb_relinquish_request_ie {

        struct uwb_ie_hdr       hdr;

        __le16                  relinquish_req_control;

        struct uwb_dev_addr     dev_addr;

        struct uwb_drp_alloc    allocs[];

} __attribute__((packed));



static inline int uwb_ie_relinquish_req_reason_code(struct uwb_relinquish_request_ie *ie)

{

	return (le16_to_cpu(ie->relinquish_req_control) >> 0) & 0xf;

}



static inline void uwb_ie_relinquish_req_set_reason_code(struct uwb_relinquish_request_ie *ie,

							 int reason_code)

{

	u16 ctrl = le16_to_cpu(ie->relinquish_req_control);

	ctrl = (ctrl & ~(0xf << 0)) | (reason_code << 0);

	ie->relinquish_req_control = cpu_to_le16(ctrl);

}



/**

 * The Vendor ID is set to an OUI that indicates the vendor of the device.

 * ECMA-368 [16.8.10]