--- /dev/null
+/*
+ * Copyright (c) 2012 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <linux/netdevice.h>
+
+#include "brcmu_wifi.h"
+#include "brcmu_utils.h"
+
+#include "core.h"
+#include "debug.h"
+#include "tracepoint.h"
+#include "fwsignal.h"
+#include "fweh.h"
+#include "fwil.h"
+
+/**
+ * struct brcm_ethhdr - broadcom specific ether header.
+ *
+ * @subtype: subtype for this packet.
+ * @length: TODO: length of appended data.
+ * @version: version indication.
+ * @oui: OUI of this packet.
+ * @usr_subtype: subtype for this OUI.
+ */
+struct brcm_ethhdr {
+ __be16 subtype;
+ __be16 length;
+ u8 version;
+ u8 oui[3];
+ __be16 usr_subtype;
+} __packed;
+
+struct brcmf_event_msg_be {
+ __be16 version;
+ __be16 flags;
+ __be32 event_type;
+ __be32 status;
+ __be32 reason;
+ __be32 auth_type;
+ __be32 datalen;
+ u8 addr[ETH_ALEN];
+ char ifname[IFNAMSIZ];
+ u8 ifidx;
+ u8 bsscfgidx;
+} __packed;
+
+/**
+ * struct brcmf_event - contents of broadcom event packet.
+ *
+ * @eth: standard ether header.
+ * @hdr: broadcom specific ether header.
+ * @msg: common part of the actual event message.
+ */
+struct brcmf_event {
+ struct ethhdr eth;
+ struct brcm_ethhdr hdr;
+ struct brcmf_event_msg_be msg;
+} __packed;
+
+/**
+ * struct brcmf_fweh_queue_item - event item on event queue.
+ *
+ * @q: list element for queuing.
+ * @code: event code.
+ * @ifidx: interface index related to this event.
+ * @ifaddr: ethernet address for interface.
+ * @emsg: common parameters of the firmware event message.
+ * @data: event specific data part of the firmware event.
+ */
+struct brcmf_fweh_queue_item {
+ struct list_head q;
+ enum brcmf_fweh_event_code code;
+ u8 ifidx;
+ u8 ifaddr[ETH_ALEN];
+ struct brcmf_event_msg_be emsg;
+ u8 data[0];
+};
+
+/**
+ * struct brcmf_fweh_event_name - code, name mapping entry.
+ */
+struct brcmf_fweh_event_name {
+ enum brcmf_fweh_event_code code;
+ const char *name;
+};
+
+#ifdef DEBUG
+#define BRCMF_ENUM_DEF(id, val) \
+ { val, #id },
+
+/* array for mapping code to event name */
+static struct brcmf_fweh_event_name fweh_event_names[] = {
+ BRCMF_FWEH_EVENT_ENUM_DEFLIST
+};
+#undef BRCMF_ENUM_DEF
+
+/**
+ * brcmf_fweh_event_name() - returns name for given event code.
+ *
+ * @code: code to lookup.
+ */
+static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(fweh_event_names); i++) {
+ if (fweh_event_names[i].code == code)
+ return fweh_event_names[i].name;
+ }
+ return "unknown";
+}
+#else
+static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
+{
+ return "nodebug";
+}
+#endif
+
+/**
+ * brcmf_fweh_queue_event() - create and queue event.
+ *
+ * @fweh: firmware event handling info.
+ * @event: event queue entry.
+ */
+static void brcmf_fweh_queue_event(struct brcmf_fweh_info *fweh,
+ struct brcmf_fweh_queue_item *event)
+{
+ ulong flags;
+
+ spin_lock_irqsave(&fweh->evt_q_lock, flags);
+ list_add_tail(&event->q, &fweh->event_q);
+ spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
+ schedule_work(&fweh->event_work);
+}
+
+static int brcmf_fweh_call_event_handler(struct brcmf_if *ifp,
+ enum brcmf_fweh_event_code code,
+ struct brcmf_event_msg *emsg,
+ void *data)
+{
+ struct brcmf_fweh_info *fweh;
+ int err = -EINVAL;
+
+ if (ifp) {
+ fweh = &ifp->drvr->fweh;
+
+ /* handle the event if valid interface and handler */
+ if (fweh->evt_handler[code])
+ err = fweh->evt_handler[code](ifp, emsg, data);
+ else
+ brcmf_err("unhandled event %d ignored\n", code);
+ } else {
+ brcmf_err("no interface object\n");
+ }
+ return err;
+}
+
+/**
+ * brcmf_fweh_handle_if_event() - handle IF event.
+ *
+ * @drvr: driver information object.
+ * @item: queue entry.
+ * @ifpp: interface object (may change upon ADD action).
+ */
+static void brcmf_fweh_handle_if_event(struct brcmf_pub *drvr,
+ struct brcmf_event_msg *emsg,
+ void *data)
+{
+ struct brcmf_if_event *ifevent = data;
+ struct brcmf_if *ifp;
+ int err = 0;
+
+ brcmf_dbg(EVENT, "action: %u idx: %u bsscfg: %u flags: %u role: %u\n",
+ ifevent->action, ifevent->ifidx, ifevent->bssidx,
+ ifevent->flags, ifevent->role);
+
+ /* The P2P Device interface event must not be ignored
+ * contrary to what firmware tells us. The only way to
+ * distinguish the P2P Device is by looking at the ifidx
+ * and bssidx received.
+ */
+ if (!(ifevent->ifidx == 0 && ifevent->bssidx == 1) &&
+ (ifevent->flags & BRCMF_E_IF_FLAG_NOIF)) {
+ brcmf_dbg(EVENT, "event can be ignored\n");
+ return;
+ }
+ if (ifevent->ifidx >= BRCMF_MAX_IFS) {
+ brcmf_err("invalid interface index: %u\n",
+ ifevent->ifidx);
+ return;
+ }
+
+ ifp = drvr->iflist[ifevent->bssidx];
+
+ if (ifevent->action == BRCMF_E_IF_ADD) {
+ brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname,
+ emsg->addr);
+ ifp = brcmf_add_if(drvr, ifevent->bssidx, ifevent->ifidx,
+ emsg->ifname, emsg->addr);
+ if (IS_ERR(ifp))
+ return;
+ brcmf_fws_add_interface(ifp);
+ if (!drvr->fweh.evt_handler[BRCMF_E_IF])
+ if (brcmf_net_attach(ifp, false) < 0)
+ return;
+ }
+
+ if (ifp && ifevent->action == BRCMF_E_IF_CHANGE)
+ brcmf_fws_reset_interface(ifp);
+
+ err = brcmf_fweh_call_event_handler(ifp, emsg->event_code, emsg, data);
+
+ if (ifp && ifevent->action == BRCMF_E_IF_DEL)
+ brcmf_remove_interface(drvr, ifevent->bssidx);
+}
+
+/**
+ * brcmf_fweh_dequeue_event() - get event from the queue.
+ *
+ * @fweh: firmware event handling info.
+ */
+static struct brcmf_fweh_queue_item *
+brcmf_fweh_dequeue_event(struct brcmf_fweh_info *fweh)
+{
+ struct brcmf_fweh_queue_item *event = NULL;
+ ulong flags;
+
+ spin_lock_irqsave(&fweh->evt_q_lock, flags);
+ if (!list_empty(&fweh->event_q)) {
+ event = list_first_entry(&fweh->event_q,
+ struct brcmf_fweh_queue_item, q);
+ list_del(&event->q);
+ }
+ spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
+
+ return event;
+}
+
+/**
+ * brcmf_fweh_event_worker() - firmware event worker.
+ *
+ * @work: worker object.
+ */
+static void brcmf_fweh_event_worker(struct work_struct *work)
+{
+ struct brcmf_pub *drvr;
+ struct brcmf_if *ifp;
+ struct brcmf_fweh_info *fweh;
+ struct brcmf_fweh_queue_item *event;
+ int err = 0;
+ struct brcmf_event_msg_be *emsg_be;
+ struct brcmf_event_msg emsg;
+
+ fweh = container_of(work, struct brcmf_fweh_info, event_work);
+ drvr = container_of(fweh, struct brcmf_pub, fweh);
+
+ while ((event = brcmf_fweh_dequeue_event(fweh))) {
+ brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
+ brcmf_fweh_event_name(event->code), event->code,
+ event->emsg.ifidx, event->emsg.bsscfgidx,
+ event->emsg.addr);
+
+ /* convert event message */
+ emsg_be = &event->emsg;
+ emsg.version = be16_to_cpu(emsg_be->version);
+ emsg.flags = be16_to_cpu(emsg_be->flags);
+ emsg.event_code = event->code;
+ emsg.status = be32_to_cpu(emsg_be->status);
+ emsg.reason = be32_to_cpu(emsg_be->reason);
+ emsg.auth_type = be32_to_cpu(emsg_be->auth_type);
+ emsg.datalen = be32_to_cpu(emsg_be->datalen);
+ memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
+ memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
+ emsg.ifidx = emsg_be->ifidx;
+ emsg.bsscfgidx = emsg_be->bsscfgidx;
+
+ brcmf_dbg(EVENT, " version %u flags %u status %u reason %u\n",
+ emsg.version, emsg.flags, emsg.status, emsg.reason);
+ brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data,
+ min_t(u32, emsg.datalen, 64),
+ "event payload, len=%d\n", emsg.datalen);
+
+ /* special handling of interface event */
+ if (event->code == BRCMF_E_IF) {
+ brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
+ goto event_free;
+ }
+
+ if ((event->code == BRCMF_E_TDLS_PEER_EVENT) &&
+ (emsg.bsscfgidx == 1))
+ ifp = drvr->iflist[0];
+ else
+ ifp = drvr->iflist[emsg.bsscfgidx];
+ err = brcmf_fweh_call_event_handler(ifp, event->code, &emsg,
+ event->data);
+ if (err) {
+ brcmf_err("event handler failed (%d)\n",
+ event->code);
+ err = 0;
+ }
+event_free:
+ kfree(event);
+ }
+}
+
+/**
+ * brcmf_fweh_attach() - initialize firmware event handling.
+ *
+ * @drvr: driver information object.
+ */
+void brcmf_fweh_attach(struct brcmf_pub *drvr)
+{
+ struct brcmf_fweh_info *fweh = &drvr->fweh;
+ INIT_WORK(&fweh->event_work, brcmf_fweh_event_worker);
+ spin_lock_init(&fweh->evt_q_lock);
+ INIT_LIST_HEAD(&fweh->event_q);
+}
+
+/**
+ * brcmf_fweh_detach() - cleanup firmware event handling.
+ *
+ * @drvr: driver information object.
+ */
+void brcmf_fweh_detach(struct brcmf_pub *drvr)
+{
+ struct brcmf_fweh_info *fweh = &drvr->fweh;
+ struct brcmf_if *ifp = drvr->iflist[0];
+ s8 eventmask[BRCMF_EVENTING_MASK_LEN];
+
+ if (ifp) {
+ /* clear all events */
+ memset(eventmask, 0, BRCMF_EVENTING_MASK_LEN);
+ (void)brcmf_fil_iovar_data_set(ifp, "event_msgs",
+ eventmask,
+ BRCMF_EVENTING_MASK_LEN);
+ }
+ /* cancel the worker */
+ cancel_work_sync(&fweh->event_work);
+ WARN_ON(!list_empty(&fweh->event_q));
+ memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
+}
+
+/**
+ * brcmf_fweh_register() - register handler for given event code.
+ *
+ * @drvr: driver information object.
+ * @code: event code.
+ * @handler: handler for the given event code.
+ */
+int brcmf_fweh_register(struct brcmf_pub *drvr, enum brcmf_fweh_event_code code,
+ brcmf_fweh_handler_t handler)
+{
+ if (drvr->fweh.evt_handler[code]) {
+ brcmf_err("event code %d already registered\n", code);
+ return -ENOSPC;
+ }
+ drvr->fweh.evt_handler[code] = handler;
+ brcmf_dbg(TRACE, "event handler registered for %s\n",
+ brcmf_fweh_event_name(code));
+ return 0;
+}
+
+/**
+ * brcmf_fweh_unregister() - remove handler for given code.
+ *
+ * @drvr: driver information object.
+ * @code: event code.
+ */
+void brcmf_fweh_unregister(struct brcmf_pub *drvr,
+ enum brcmf_fweh_event_code code)
+{
+ brcmf_dbg(TRACE, "event handler cleared for %s\n",
+ brcmf_fweh_event_name(code));
+ drvr->fweh.evt_handler[code] = NULL;
+}
+
+/**
+ * brcmf_fweh_activate_events() - enables firmware events registered.
+ *
+ * @ifp: primary interface object.
+ */
+int brcmf_fweh_activate_events(struct brcmf_if *ifp)
+{
+ int i, err;
+ s8 eventmask[BRCMF_EVENTING_MASK_LEN];
+
+ for (i = 0; i < BRCMF_E_LAST; i++) {
+ if (ifp->drvr->fweh.evt_handler[i]) {
+ brcmf_dbg(EVENT, "enable event %s\n",
+ brcmf_fweh_event_name(i));
+ setbit(eventmask, i);
+ }
+ }
+
+ /* want to handle IF event as well */
+ brcmf_dbg(EVENT, "enable event IF\n");
+ setbit(eventmask, BRCMF_E_IF);
+
+ err = brcmf_fil_iovar_data_set(ifp, "event_msgs",
+ eventmask, BRCMF_EVENTING_MASK_LEN);
+ if (err)
+ brcmf_err("Set event_msgs error (%d)\n", err);
+
+ return err;
+}
+
+/**
+ * brcmf_fweh_process_event() - process skb as firmware event.
+ *
+ * @drvr: driver information object.
+ * @event_packet: event packet to process.
+ *
+ * If the packet buffer contains a firmware event message it will
+ * dispatch the event to a registered handler (using worker).
+ */
+void brcmf_fweh_process_event(struct brcmf_pub *drvr,
+ struct brcmf_event *event_packet)
+{
+ enum brcmf_fweh_event_code code;
+ struct brcmf_fweh_info *fweh = &drvr->fweh;
+ struct brcmf_fweh_queue_item *event;
+ gfp_t alloc_flag = GFP_KERNEL;
+ void *data;
+ u32 datalen;
+
+ /* get event info */
+ code = get_unaligned_be32(&event_packet->msg.event_type);
+ datalen = get_unaligned_be32(&event_packet->msg.datalen);
+ data = &event_packet[1];
+
+ if (code >= BRCMF_E_LAST)
+ return;
+
+ if (code != BRCMF_E_IF && !fweh->evt_handler[code])
+ return;
+
+ if (in_interrupt())
+ alloc_flag = GFP_ATOMIC;
+
+ event = kzalloc(sizeof(*event) + datalen, alloc_flag);
+ if (!event)
+ return;
+
+ event->code = code;
+ event->ifidx = event_packet->msg.ifidx;
+
+ /* use memcpy to get aligned event message */
+ memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
+ memcpy(event->data, data, datalen);
+ memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);
+
+ brcmf_fweh_queue_event(fweh, event);
+}
Code Review / kvmfornfv.git / blobdiff