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/*
* Copyright (c) 2010 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/kernel.h>
#include <bcmdefs.h>
#include <linuxver.h>
#include <bcmutils.h>
#include <siutils.h>
#include <wlioctl.h>
#include <wlc_cfg.h>
#include <wlc_pub.h>
#include <wlc_key.h>
#include <wl_export.h>
#include <wlc_event.h>
#include <d11.h>
#include <wlc_rate.h>
#include <wlc_mac80211.h>
#ifdef MSGTRACE
#include <msgtrace.h>
#endif
/* Local prototypes */
static void wlc_timer_cb(void *arg);
/* Private data structures */
struct wlc_eventq {
wlc_event_t *head;
wlc_event_t *tail;
struct wlc_info *wlc;
void *wl;
wlc_pub_t *pub;
bool tpending;
bool workpending;
struct wl_timer *timer;
wlc_eventq_cb_t cb;
u8 event_inds_mask[broken_roundup(WLC_E_LAST, NBBY) / NBBY];
};
/*
* Export functions
*/
wlc_eventq_t *wlc_eventq_attach(wlc_pub_t *pub, struct wlc_info *wlc, void *wl,
wlc_eventq_cb_t cb)
{
wlc_eventq_t *eq;
eq = kzalloc(sizeof(wlc_eventq_t), GFP_ATOMIC);
if (eq == NULL)
return NULL;
eq->cb = cb;
eq->wlc = wlc;
eq->wl = wl;
eq->pub = pub;
eq->timer = wl_init_timer(eq->wl, wlc_timer_cb, eq, "eventq");
if (!eq->timer) {
WL_ERROR(("wl%d: wlc_eventq_attach: timer failed\n",
pub->unit));
kfree(eq);
return NULL;
}
return eq;
}
int wlc_eventq_detach(wlc_eventq_t *eq)
{
/* Clean up pending events */
wlc_eventq_down(eq);
if (eq->timer) {
if (eq->tpending) {
wl_del_timer(eq->wl, eq->timer);
eq->tpending = false;
}
wl_free_timer(eq->wl, eq->timer);
eq->timer = NULL;
}
ASSERT(wlc_eventq_avail(eq) == false);
kfree(eq);
return 0;
}
int wlc_eventq_down(wlc_eventq_t *eq)
{
int callbacks = 0;
if (eq->tpending && !eq->workpending) {
if (!wl_del_timer(eq->wl, eq->timer))
callbacks++;
ASSERT(wlc_eventq_avail(eq) == true);
ASSERT(eq->workpending == false);
eq->workpending = true;
if (eq->cb)
eq->cb(eq->wlc);
ASSERT(eq->workpending == true);
eq->workpending = false;
eq->tpending = false;
} else {
ASSERT(eq->workpending || wlc_eventq_avail(eq) == false);
}
return callbacks;
}
wlc_event_t *wlc_event_alloc(wlc_eventq_t *eq)
{
wlc_event_t *e;
e = kzalloc(sizeof(wlc_event_t), GFP_ATOMIC);
if (e == NULL)
return NULL;
return e;
}
void wlc_event_free(wlc_eventq_t *eq, wlc_event_t *e)
{
ASSERT(e->data == NULL);
ASSERT(e->next == NULL);
kfree(e);
}
void wlc_eventq_enq(wlc_eventq_t *eq, wlc_event_t *e)
{
ASSERT(e->next == NULL);
e->next = NULL;
if (eq->tail) {
eq->tail->next = e;
eq->tail = e;
} else
eq->head = eq->tail = e;
if (!eq->tpending) {
eq->tpending = true;
/* Use a zero-delay timer to trigger
* delayed processing of the event.
*/
wl_add_timer(eq->wl, eq->timer, 0, 0);
}
}
wlc_event_t *wlc_eventq_deq(wlc_eventq_t *eq)
{
wlc_event_t *e;
e = eq->head;
if (e) {
eq->head = e->next;
e->next = NULL;
if (eq->head == NULL)
eq->tail = eq->head;
}
return e;
}
wlc_event_t *wlc_eventq_next(wlc_eventq_t *eq, wlc_event_t *e)
{
#ifdef BCMDBG
wlc_event_t *etmp;
for (etmp = eq->head; etmp; etmp = etmp->next) {
if (etmp == e)
break;
}
ASSERT(etmp != NULL);
#endif
return e->next;
}
int wlc_eventq_cnt(wlc_eventq_t *eq)
{
wlc_event_t *etmp;
int cnt = 0;
for (etmp = eq->head; etmp; etmp = etmp->next)
cnt++;
return cnt;
}
bool wlc_eventq_avail(wlc_eventq_t *eq)
{
return (eq->head != NULL);
}
/*
* Local Functions
*/
static void wlc_timer_cb(void *arg)
{
struct wlc_eventq *eq = (struct wlc_eventq *)arg;
ASSERT(eq->tpending == true);
ASSERT(wlc_eventq_avail(eq) == true);
ASSERT(eq->workpending == false);
eq->workpending = true;
if (eq->cb)
eq->cb(eq->wlc);
ASSERT(wlc_eventq_avail(eq) == false);
ASSERT(eq->tpending == true);
eq->workpending = false;
eq->tpending = false;
}
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