436 lines
11 KiB
C
436 lines
11 KiB
C
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// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2012 Broadcom Corporation
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*/
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#include <linux/netdevice.h>
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#include "brcmu_wifi.h"
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#include "brcmu_utils.h"
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#include "cfg80211.h"
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#include "core.h"
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#include "debug.h"
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#include "tracepoint.h"
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#include "fweh.h"
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#include "fwil.h"
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#include "proto.h"
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/**
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* struct brcmf_fweh_queue_item - event item on event queue.
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*
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* @q: list element for queuing.
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* @code: event code.
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* @ifidx: interface index related to this event.
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* @ifaddr: ethernet address for interface.
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* @emsg: common parameters of the firmware event message.
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* @datalen: length of the data array
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* @data: event specific data part of the firmware event.
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*/
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struct brcmf_fweh_queue_item {
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struct list_head q;
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enum brcmf_fweh_event_code code;
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u8 ifidx;
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u8 ifaddr[ETH_ALEN];
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struct brcmf_event_msg_be emsg;
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u32 datalen;
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u8 data[];
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};
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/*
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* struct brcmf_fweh_event_name - code, name mapping entry.
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*/
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struct brcmf_fweh_event_name {
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enum brcmf_fweh_event_code code;
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const char *name;
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};
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#ifdef DEBUG
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#define BRCMF_ENUM_DEF(id, val) \
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{ val, #id },
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/* array for mapping code to event name */
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static struct brcmf_fweh_event_name fweh_event_names[] = {
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BRCMF_FWEH_EVENT_ENUM_DEFLIST
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};
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#undef BRCMF_ENUM_DEF
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/**
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* brcmf_fweh_event_name() - returns name for given event code.
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*
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* @code: code to lookup.
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*/
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const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(fweh_event_names); i++) {
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if (fweh_event_names[i].code == code)
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return fweh_event_names[i].name;
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}
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return "unknown";
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}
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#else
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const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
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{
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return "nodebug";
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}
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#endif
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/**
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* brcmf_fweh_queue_event() - create and queue event.
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*
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* @fweh: firmware event handling info.
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* @event: event queue entry.
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*/
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static void brcmf_fweh_queue_event(struct brcmf_fweh_info *fweh,
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struct brcmf_fweh_queue_item *event)
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{
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ulong flags;
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spin_lock_irqsave(&fweh->evt_q_lock, flags);
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list_add_tail(&event->q, &fweh->event_q);
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spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
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schedule_work(&fweh->event_work);
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}
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static int brcmf_fweh_call_event_handler(struct brcmf_pub *drvr,
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struct brcmf_if *ifp,
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enum brcmf_fweh_event_code code,
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struct brcmf_event_msg *emsg,
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void *data)
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{
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struct brcmf_fweh_info *fweh;
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int err = -EINVAL;
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if (ifp) {
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fweh = &ifp->drvr->fweh;
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/* handle the event if valid interface and handler */
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if (fweh->evt_handler[code])
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err = fweh->evt_handler[code](ifp, emsg, data);
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else
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bphy_err(drvr, "unhandled event %d ignored\n", code);
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} else {
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bphy_err(drvr, "no interface object\n");
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}
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return err;
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}
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/**
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* brcmf_fweh_handle_if_event() - handle IF event.
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*
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* @drvr: driver information object.
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* @emsg: event message object.
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* @data: event object.
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*/
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static void brcmf_fweh_handle_if_event(struct brcmf_pub *drvr,
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struct brcmf_event_msg *emsg,
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void *data)
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{
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struct brcmf_if_event *ifevent = data;
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struct brcmf_if *ifp;
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bool is_p2pdev;
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brcmf_dbg(EVENT, "action: %u ifidx: %u bsscfgidx: %u flags: %u role: %u\n",
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ifevent->action, ifevent->ifidx, ifevent->bsscfgidx,
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ifevent->flags, ifevent->role);
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/* The P2P Device interface event must not be ignored contrary to what
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* firmware tells us. Older firmware uses p2p noif, with sta role.
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* This should be accepted when p2pdev_setup is ongoing. TDLS setup will
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* use the same ifevent and should be ignored.
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*/
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is_p2pdev = ((ifevent->flags & BRCMF_E_IF_FLAG_NOIF) &&
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(ifevent->role == BRCMF_E_IF_ROLE_P2P_CLIENT ||
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((ifevent->role == BRCMF_E_IF_ROLE_STA) &&
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(drvr->fweh.p2pdev_setup_ongoing))));
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if (!is_p2pdev && (ifevent->flags & BRCMF_E_IF_FLAG_NOIF)) {
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brcmf_dbg(EVENT, "event can be ignored\n");
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return;
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}
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if (ifevent->ifidx >= BRCMF_MAX_IFS) {
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bphy_err(drvr, "invalid interface index: %u\n", ifevent->ifidx);
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return;
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}
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ifp = drvr->iflist[ifevent->bsscfgidx];
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if (ifevent->action == BRCMF_E_IF_ADD) {
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brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname,
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emsg->addr);
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ifp = brcmf_add_if(drvr, ifevent->bsscfgidx, ifevent->ifidx,
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is_p2pdev, emsg->ifname, emsg->addr);
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if (IS_ERR(ifp))
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return;
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if (!is_p2pdev)
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brcmf_proto_add_if(drvr, ifp);
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if (!drvr->fweh.evt_handler[BRCMF_E_IF])
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if (brcmf_net_attach(ifp, false) < 0)
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return;
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}
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if (ifp && ifevent->action == BRCMF_E_IF_CHANGE)
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brcmf_proto_reset_if(drvr, ifp);
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brcmf_fweh_call_event_handler(drvr, ifp, emsg->event_code, emsg,
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data);
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if (ifp && ifevent->action == BRCMF_E_IF_DEL) {
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bool armed = brcmf_cfg80211_vif_event_armed(drvr->config);
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/* Default handling in case no-one waits for this event */
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if (!armed)
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brcmf_remove_interface(ifp, false);
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}
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}
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/**
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* brcmf_fweh_dequeue_event() - get event from the queue.
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*
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* @fweh: firmware event handling info.
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*/
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static struct brcmf_fweh_queue_item *
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brcmf_fweh_dequeue_event(struct brcmf_fweh_info *fweh)
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{
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struct brcmf_fweh_queue_item *event = NULL;
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ulong flags;
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spin_lock_irqsave(&fweh->evt_q_lock, flags);
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if (!list_empty(&fweh->event_q)) {
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event = list_first_entry(&fweh->event_q,
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struct brcmf_fweh_queue_item, q);
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list_del(&event->q);
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}
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spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
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return event;
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}
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/**
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* brcmf_fweh_event_worker() - firmware event worker.
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*
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* @work: worker object.
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*/
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static void brcmf_fweh_event_worker(struct work_struct *work)
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{
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struct brcmf_pub *drvr;
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struct brcmf_if *ifp;
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struct brcmf_fweh_info *fweh;
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struct brcmf_fweh_queue_item *event;
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int err = 0;
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struct brcmf_event_msg_be *emsg_be;
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struct brcmf_event_msg emsg;
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fweh = container_of(work, struct brcmf_fweh_info, event_work);
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drvr = container_of(fweh, struct brcmf_pub, fweh);
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while ((event = brcmf_fweh_dequeue_event(fweh))) {
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brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
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brcmf_fweh_event_name(event->code), event->code,
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event->emsg.ifidx, event->emsg.bsscfgidx,
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event->emsg.addr);
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if (event->emsg.bsscfgidx >= BRCMF_MAX_IFS) {
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bphy_err(drvr, "invalid bsscfg index: %u\n", event->emsg.bsscfgidx);
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goto event_free;
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}
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/* convert event message */
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emsg_be = &event->emsg;
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emsg.version = be16_to_cpu(emsg_be->version);
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emsg.flags = be16_to_cpu(emsg_be->flags);
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emsg.event_code = event->code;
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emsg.status = be32_to_cpu(emsg_be->status);
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emsg.reason = be32_to_cpu(emsg_be->reason);
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emsg.auth_type = be32_to_cpu(emsg_be->auth_type);
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emsg.datalen = be32_to_cpu(emsg_be->datalen);
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memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
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memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
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emsg.ifidx = emsg_be->ifidx;
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emsg.bsscfgidx = emsg_be->bsscfgidx;
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brcmf_dbg(EVENT, " version %u flags %u status %u reason %u\n",
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emsg.version, emsg.flags, emsg.status, emsg.reason);
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brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data,
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min_t(u32, emsg.datalen, 64),
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"event payload, len=%d\n", emsg.datalen);
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/* special handling of interface event */
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if (event->code == BRCMF_E_IF) {
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brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
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goto event_free;
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}
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if (event->code == BRCMF_E_TDLS_PEER_EVENT)
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ifp = drvr->iflist[0];
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else
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ifp = drvr->iflist[emsg.bsscfgidx];
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err = brcmf_fweh_call_event_handler(drvr, ifp, event->code,
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&emsg, event->data);
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if (err) {
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bphy_err(drvr, "event handler failed (%d)\n",
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event->code);
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err = 0;
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}
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event_free:
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kfree(event);
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}
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}
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/**
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* brcmf_fweh_p2pdev_setup() - P2P device setup ongoing (or not).
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*
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* @ifp: ifp on which setup is taking place or finished.
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* @ongoing: p2p device setup in progress (or not).
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*/
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void brcmf_fweh_p2pdev_setup(struct brcmf_if *ifp, bool ongoing)
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{
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ifp->drvr->fweh.p2pdev_setup_ongoing = ongoing;
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}
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/**
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* brcmf_fweh_attach() - initialize firmware event handling.
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*
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* @drvr: driver information object.
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*/
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void brcmf_fweh_attach(struct brcmf_pub *drvr)
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{
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struct brcmf_fweh_info *fweh = &drvr->fweh;
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INIT_WORK(&fweh->event_work, brcmf_fweh_event_worker);
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spin_lock_init(&fweh->evt_q_lock);
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INIT_LIST_HEAD(&fweh->event_q);
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}
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/**
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* brcmf_fweh_detach() - cleanup firmware event handling.
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*
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* @drvr: driver information object.
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*/
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void brcmf_fweh_detach(struct brcmf_pub *drvr)
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{
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struct brcmf_fweh_info *fweh = &drvr->fweh;
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/* cancel the worker if initialized */
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if (fweh->event_work.func) {
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cancel_work_sync(&fweh->event_work);
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WARN_ON(!list_empty(&fweh->event_q));
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memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
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}
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}
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/**
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* brcmf_fweh_register() - register handler for given event code.
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*
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* @drvr: driver information object.
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* @code: event code.
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* @handler: handler for the given event code.
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*/
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int brcmf_fweh_register(struct brcmf_pub *drvr, enum brcmf_fweh_event_code code,
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brcmf_fweh_handler_t handler)
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{
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if (drvr->fweh.evt_handler[code]) {
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bphy_err(drvr, "event code %d already registered\n", code);
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return -ENOSPC;
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}
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drvr->fweh.evt_handler[code] = handler;
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brcmf_dbg(TRACE, "event handler registered for %s\n",
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brcmf_fweh_event_name(code));
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return 0;
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}
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/**
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* brcmf_fweh_unregister() - remove handler for given code.
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*
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* @drvr: driver information object.
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* @code: event code.
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*/
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void brcmf_fweh_unregister(struct brcmf_pub *drvr,
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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)
|
||
|
|
{
|
||
|
|
struct brcmf_pub *drvr = ifp->drvr;
|
||
|
|
int i, err;
|
||
|
|
s8 eventmask[BRCMF_EVENTING_MASK_LEN];
|
||
|
|
|
||
|
|
memset(eventmask, 0, sizeof(eventmask));
|
||
|
|
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)
|
||
|
|
bphy_err(drvr, "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.
|
||
|
|
* @packet_len: length of the packet
|
||
|
|
* @gfp: memory allocation flags.
|
||
|
|
*
|
||
|
|
* 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,
|
||
|
|
u32 packet_len, gfp_t gfp)
|
||
|
|
{
|
||
|
|
enum brcmf_fweh_event_code code;
|
||
|
|
struct brcmf_fweh_info *fweh = &drvr->fweh;
|
||
|
|
struct brcmf_fweh_queue_item *event;
|
||
|
|
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 (datalen > BRCMF_DCMD_MAXLEN ||
|
||
|
|
datalen + sizeof(*event_packet) > packet_len)
|
||
|
|
return;
|
||
|
|
|
||
|
|
event = kzalloc(sizeof(*event) + datalen, gfp);
|
||
|
|
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);
|
||
|
|
event->datalen = datalen;
|
||
|
|
memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);
|
||
|
|
|
||
|
|
brcmf_fweh_queue_event(fweh, event);
|
||
|
|
}
|