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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 <linux/string.h>
#include <linux/netdevice.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include "core.h"
#include "bus.h"
#include "debug.h"
#include "fwil.h"
#include "fwil_types.h"
#include "tracepoint.h"
#define BRCMF_DEFAULT_BCN_TIMEOUT 3
#define BRCMF_DEFAULT_SCAN_CHANNEL_TIME 40
#define BRCMF_DEFAULT_SCAN_UNASSOC_TIME 40
/* boost value for RSSI_DELTA in preferred join selection */
#define BRCMF_JOIN_PREF_RSSI_BOOST 8
bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
struct sk_buff *pkt, int prec)
{
struct sk_buff *p;
int eprec = -1; /* precedence to evict from */
bool discard_oldest;
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
struct brcmf_pub *drvr = bus_if->drvr;
/* Fast case, precedence queue is not full and we are also not
* exceeding total queue length
*/
if (!pktq_pfull(q, prec) && !pktq_full(q)) {
brcmu_pktq_penq(q, prec, pkt);
return true;
}
/* Determine precedence from which to evict packet, if any */
if (pktq_pfull(q, prec)) {
eprec = prec;
} else if (pktq_full(q)) {
p = brcmu_pktq_peek_tail(q, &eprec);
if (eprec > prec)
return false;
}
/* Evict if needed */
if (eprec >= 0) {
/* Detect queueing to unconfigured precedence */
discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
if (eprec == prec && !discard_oldest)
return false; /* refuse newer (incoming) packet */
/* Evict packet according to discard policy */
p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
brcmu_pktq_pdeq_tail(q, eprec);
if (p == NULL)
brcmf_err("brcmu_pktq_penq() failed, oldest %d\n",
discard_oldest);
brcmu_pkt_buf_free_skb(p);
}
/* Enqueue */
p = brcmu_pktq_penq(q, prec, pkt);
if (p == NULL)
brcmf_err("brcmu_pktq_penq() failed\n");
return p != NULL;
}
int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
{
s8 eventmask[BRCMF_EVENTING_MASK_LEN];
u8 buf[BRCMF_DCMD_SMLEN];
struct brcmf_join_pref_params join_pref_params[2];
char *ptr;
s32 err;
/* retreive mac address */
err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
sizeof(ifp->mac_addr));
if (err < 0) {
brcmf_err("Retreiving cur_etheraddr failed, %d\n",
err);
goto done;
}
memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));
/* query for 'ver' to get version info from firmware */
memset(buf, 0, sizeof(buf));
strcpy(buf, "ver");
err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
if (err < 0) {
brcmf_err("Retreiving version information failed, %d\n",
err);
goto done;
}
ptr = (char *)buf;
strsep(&ptr, "\n");
/* Print fw version info */
brcmf_err("Firmware version = %s\n", buf);
/* locate firmware version number for ethtool */
ptr = strrchr(buf, ' ') + 1;
strlcpy(ifp->drvr->fwver, ptr, sizeof(ifp->drvr->fwver));
/* set mpc */
err = brcmf_fil_iovar_int_set(ifp, "mpc", 1);
if (err) {
brcmf_err("failed setting mpc\n");
goto done;
}
/*
* Setup timeout if Beacons are lost and roam is off to report
* link down
*/
err = brcmf_fil_iovar_int_set(ifp, "bcn_timeout",
BRCMF_DEFAULT_BCN_TIMEOUT);
if (err) {
brcmf_err("bcn_timeout error (%d)\n", err);
goto done;
}
/* Enable/Disable build-in roaming to allowed ext supplicant to take
* of romaing
*/
err = brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
if (err) {
brcmf_err("roam_off error (%d)\n", err);
goto done;
}
/* Setup join_pref to select target by RSSI(with boost on 5GHz) */
join_pref_params[0].type = BRCMF_JOIN_PREF_RSSI_DELTA;
join_pref_params[0].len = 2;
join_pref_params[0].rssi_gain = BRCMF_JOIN_PREF_RSSI_BOOST;
join_pref_params[0].band = WLC_BAND_5G;
join_pref_params[1].type = BRCMF_JOIN_PREF_RSSI;
join_pref_params[1].len = 2;
join_pref_params[1].rssi_gain = 0;
join_pref_params[1].band = 0;
err = brcmf_fil_iovar_data_set(ifp, "join_pref", join_pref_params,
sizeof(join_pref_params));
if (err)
brcmf_err("Set join_pref error (%d)\n", err);
/* Setup event_msgs, enable E_IF */
err = brcmf_fil_iovar_data_get(ifp, "event_msgs", eventmask,
BRCMF_EVENTING_MASK_LEN);
if (err) {
brcmf_err("Get event_msgs error (%d)\n", err);
goto done;
}
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);
goto done;
}
/* Setup default scan channel time */
err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_CHANNEL_TIME,
BRCMF_DEFAULT_SCAN_CHANNEL_TIME);
if (err) {
brcmf_err("BRCMF_C_SET_SCAN_CHANNEL_TIME error (%d)\n",
err);
goto done;
}
/* Setup default scan unassoc time */
err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_UNASSOC_TIME,
BRCMF_DEFAULT_SCAN_UNASSOC_TIME);
if (err) {
brcmf_err("BRCMF_C_SET_SCAN_UNASSOC_TIME error (%d)\n",
err);
goto done;
}
/* do bus specific preinit here */
err = brcmf_bus_preinit(ifp->drvr->bus_if);
done:
return err;
}
#if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
{
struct va_format vaf = {
.fmt = fmt,
};
va_list args;
va_start(args, fmt);
vaf.va = &args;
if (brcmf_msg_level & level)
pr_debug("%s %pV", func, &vaf);
trace_brcmf_dbg(level, func, &vaf);
va_end(args);
}
#endif
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