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: Stefano Panella <stefano.panella@csr.com>
Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/uwb/Makefile b/drivers/uwb/Makefile
index 257e690..2b99c3e 100644
--- a/drivers/uwb/Makefile
+++ b/drivers/uwb/Makefile
@@ -13,6 +13,7 @@
drp-ie.o \
est.o \
ie.o \
+ ie-rcv.o \
lc-dev.o \
lc-rc.o \
neh.o \
diff --git a/drivers/uwb/ie-rcv.c b/drivers/uwb/ie-rcv.c
new file mode 100644
index 0000000..917e6d7
--- /dev/null
+++ b/drivers/uwb/ie-rcv.c
@@ -0,0 +1,55 @@
+/*
+ * 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;
+}
diff --git a/drivers/uwb/uwb-internal.h b/drivers/uwb/uwb-internal.h
index 983ebc4..031e8a8 100644
--- a/drivers/uwb/uwb-internal.h
+++ b/drivers/uwb/uwb-internal.h
@@ -167,6 +167,7 @@
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 *);
diff --git a/drivers/uwb/uwbd.c b/drivers/uwb/uwbd.c
index 7890841..f751135 100644
--- a/drivers/uwb/uwbd.c
+++ b/drivers/uwb/uwbd.c
@@ -104,6 +104,10 @@
/** 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"
diff --git a/include/linux/uwb/spec.h b/include/linux/uwb/spec.h
index 198c15f..a30436e 100644
--- a/include/linux/uwb/spec.h
+++ b/include/linux/uwb/spec.h
@@ -200,6 +200,12 @@
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 @@
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 @@
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]
