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431 lines
11 KiB
431 lines
11 KiB
// 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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/* 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) |
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{ |
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brcmf_dbg(TRACE, "event handler cleared for %s\n", |
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brcmf_fweh_event_name(code)); |
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drvr->fweh.evt_handler[code] = NULL; |
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} |
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/** |
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* brcmf_fweh_activate_events() - enables firmware events registered. |
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* |
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* @ifp: primary interface object. |
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*/ |
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int brcmf_fweh_activate_events(struct brcmf_if *ifp) |
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{ |
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struct brcmf_pub *drvr = ifp->drvr; |
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int i, err; |
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s8 eventmask[BRCMF_EVENTING_MASK_LEN]; |
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memset(eventmask, 0, sizeof(eventmask)); |
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for (i = 0; i < BRCMF_E_LAST; i++) { |
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if (ifp->drvr->fweh.evt_handler[i]) { |
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brcmf_dbg(EVENT, "enable event %s\n", |
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brcmf_fweh_event_name(i)); |
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setbit(eventmask, i); |
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} |
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} |
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/* want to handle IF event as well */ |
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brcmf_dbg(EVENT, "enable event IF\n"); |
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setbit(eventmask, BRCMF_E_IF); |
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err = brcmf_fil_iovar_data_set(ifp, "event_msgs", |
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eventmask, BRCMF_EVENTING_MASK_LEN); |
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if (err) |
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bphy_err(drvr, "Set event_msgs error (%d)\n", err); |
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return err; |
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} |
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/** |
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* brcmf_fweh_process_event() - process skb as firmware event. |
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* |
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* @drvr: driver information object. |
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* @event_packet: event packet to process. |
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* @packet_len: length of the packet |
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* @gfp: memory allocation flags. |
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* |
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* If the packet buffer contains a firmware event message it will |
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* dispatch the event to a registered handler (using worker). |
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*/ |
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void brcmf_fweh_process_event(struct brcmf_pub *drvr, |
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struct brcmf_event *event_packet, |
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u32 packet_len, gfp_t gfp) |
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{ |
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enum brcmf_fweh_event_code code; |
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struct brcmf_fweh_info *fweh = &drvr->fweh; |
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struct brcmf_fweh_queue_item *event; |
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void *data; |
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u32 datalen; |
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/* get event info */ |
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code = get_unaligned_be32(&event_packet->msg.event_type); |
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datalen = get_unaligned_be32(&event_packet->msg.datalen); |
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data = &event_packet[1]; |
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if (code >= BRCMF_E_LAST) |
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return; |
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if (code != BRCMF_E_IF && !fweh->evt_handler[code]) |
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return; |
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if (datalen > BRCMF_DCMD_MAXLEN || |
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datalen + sizeof(*event_packet) > packet_len) |
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return; |
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event = kzalloc(sizeof(*event) + datalen, gfp); |
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if (!event) |
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return; |
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event->code = code; |
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event->ifidx = event_packet->msg.ifidx; |
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/* use memcpy to get aligned event message */ |
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memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg)); |
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memcpy(event->data, data, datalen); |
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event->datalen = datalen; |
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memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN); |
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brcmf_fweh_queue_event(fweh, event); |
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}
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