openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/drivers/net/wireless/cw1200/wsm.c

1823 lines
43 KiB
C
Raw Blame History

/*
* WSM host interface (HI) implementation for
* ST-Ericsson CW1200 mac80211 drivers.
*
* Copyright (c) 2010, ST-Ericsson
* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/skbuff.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/random.h>
#include "cw1200.h"
#include "wsm.h"
#include "bh.h"
#include "sta.h"
#include "debug.h"
#define WSM_CMD_TIMEOUT (2 * HZ) /* With respect to interrupt loss */
#define WSM_CMD_START_TIMEOUT (7 * HZ)
#define WSM_CMD_RESET_TIMEOUT (3 * HZ) /* 2 sec. timeout was observed. */
#define WSM_CMD_MAX_TIMEOUT (3 * HZ)
#define WSM_SKIP(buf, size) \
do { \
if ((buf)->data + size > (buf)->end) \
goto underflow; \
(buf)->data += size; \
} while (0)
#define WSM_GET(buf, ptr, size) \
do { \
if ((buf)->data + size > (buf)->end) \
goto underflow; \
memcpy(ptr, (buf)->data, size); \
(buf)->data += size; \
} while (0)
#define __WSM_GET(buf, type, type2, cvt) \
({ \
type val; \
if ((buf)->data + sizeof(type) > (buf)->end) \
goto underflow; \
val = cvt(*(type2 *)(buf)->data); \
(buf)->data += sizeof(type); \
val; \
})
#define WSM_GET8(buf) __WSM_GET(buf, u8, u8, (u8))
#define WSM_GET16(buf) __WSM_GET(buf, u16, __le16, __le16_to_cpu)
#define WSM_GET32(buf) __WSM_GET(buf, u32, __le32, __le32_to_cpu)
#define WSM_PUT(buf, ptr, size) \
do { \
if ((buf)->data + size > (buf)->end) \
if (wsm_buf_reserve((buf), size)) \
goto nomem; \
memcpy((buf)->data, ptr, size); \
(buf)->data += size; \
} while (0)
#define __WSM_PUT(buf, val, type, type2, cvt) \
do { \
if ((buf)->data + sizeof(type) > (buf)->end) \
if (wsm_buf_reserve((buf), sizeof(type))) \
goto nomem; \
*(type2 *)(buf)->data = cvt(val); \
(buf)->data += sizeof(type); \
} while (0)
#define WSM_PUT8(buf, val) __WSM_PUT(buf, val, u8, u8, (u8))
#define WSM_PUT16(buf, val) __WSM_PUT(buf, val, u16, __le16, __cpu_to_le16)
#define WSM_PUT32(buf, val) __WSM_PUT(buf, val, u32, __le32, __cpu_to_le32)
static void wsm_buf_reset(struct wsm_buf *buf);
static int wsm_buf_reserve(struct wsm_buf *buf, size_t extra_size);
static int wsm_cmd_send(struct cw1200_common *priv,
struct wsm_buf *buf,
void *arg, u16 cmd, long tmo);
#define wsm_cmd_lock(__priv) mutex_lock(&((__priv)->wsm_cmd_mux))
#define wsm_cmd_unlock(__priv) mutex_unlock(&((__priv)->wsm_cmd_mux))
/* ******************************************************************** */
/* WSM API implementation */
static int wsm_generic_confirm(struct cw1200_common *priv,
void *arg,
struct wsm_buf *buf)
{
u32 status = WSM_GET32(buf);
if (status != WSM_STATUS_SUCCESS)
return -EINVAL;
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
int wsm_configuration(struct cw1200_common *priv, struct wsm_configuration *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT32(buf, arg->dot11MaxTransmitMsduLifeTime);
WSM_PUT32(buf, arg->dot11MaxReceiveLifeTime);
WSM_PUT32(buf, arg->dot11RtsThreshold);
/* DPD block. */
WSM_PUT16(buf, arg->dpdData_size + 12);
WSM_PUT16(buf, 1); /* DPD version */
WSM_PUT(buf, arg->dot11StationId, ETH_ALEN);
WSM_PUT16(buf, 5); /* DPD flags */
WSM_PUT(buf, arg->dpdData, arg->dpdData_size);
ret = wsm_cmd_send(priv, buf, arg,
WSM_CONFIGURATION_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
static int wsm_configuration_confirm(struct cw1200_common *priv,
struct wsm_configuration *arg,
struct wsm_buf *buf)
{
int i;
int status;
status = WSM_GET32(buf);
if (WARN_ON(status != WSM_STATUS_SUCCESS))
return -EINVAL;
WSM_GET(buf, arg->dot11StationId, ETH_ALEN);
arg->dot11FrequencyBandsSupported = WSM_GET8(buf);
WSM_SKIP(buf, 1);
arg->supportedRateMask = WSM_GET32(buf);
for (i = 0; i < 2; ++i) {
arg->txPowerRange[i].min_power_level = WSM_GET32(buf);
arg->txPowerRange[i].max_power_level = WSM_GET32(buf);
arg->txPowerRange[i].stepping = WSM_GET32(buf);
}
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
/* ******************************************************************** */
int wsm_reset(struct cw1200_common *priv, const struct wsm_reset *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
u16 cmd = WSM_RESET_REQ_ID | WSM_TX_LINK_ID(arg->link_id);
wsm_cmd_lock(priv);
WSM_PUT32(buf, arg->reset_statistics ? 0 : 1);
ret = wsm_cmd_send(priv, buf, NULL, cmd, WSM_CMD_RESET_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
struct wsm_mib {
u16 mib_id;
void *buf;
size_t buf_size;
};
int wsm_read_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
size_t buf_size)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
struct wsm_mib mib_buf = {
.mib_id = mib_id,
.buf = _buf,
.buf_size = buf_size,
};
wsm_cmd_lock(priv);
WSM_PUT16(buf, mib_id);
WSM_PUT16(buf, 0);
ret = wsm_cmd_send(priv, buf, &mib_buf,
WSM_READ_MIB_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
static int wsm_read_mib_confirm(struct cw1200_common *priv,
struct wsm_mib *arg,
struct wsm_buf *buf)
{
u16 size;
if (WARN_ON(WSM_GET32(buf) != WSM_STATUS_SUCCESS))
return -EINVAL;
if (WARN_ON(WSM_GET16(buf) != arg->mib_id))
return -EINVAL;
size = WSM_GET16(buf);
if (size > arg->buf_size)
size = arg->buf_size;
WSM_GET(buf, arg->buf, size);
arg->buf_size = size;
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
/* ******************************************************************** */
int wsm_write_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
size_t buf_size)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
struct wsm_mib mib_buf = {
.mib_id = mib_id,
.buf = _buf,
.buf_size = buf_size,
};
wsm_cmd_lock(priv);
WSM_PUT16(buf, mib_id);
WSM_PUT16(buf, buf_size);
WSM_PUT(buf, _buf, buf_size);
ret = wsm_cmd_send(priv, buf, &mib_buf,
WSM_WRITE_MIB_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
static int wsm_write_mib_confirm(struct cw1200_common *priv,
struct wsm_mib *arg,
struct wsm_buf *buf)
{
int ret;
ret = wsm_generic_confirm(priv, arg, buf);
if (ret)
return ret;
if (arg->mib_id == WSM_MIB_ID_OPERATIONAL_POWER_MODE) {
/* OperationalMode: update PM status. */
const char *p = arg->buf;
cw1200_enable_powersave(priv, (p[0] & 0x0F) ? true : false);
}
return 0;
}
/* ******************************************************************** */
int wsm_scan(struct cw1200_common *priv, const struct wsm_scan *arg)
{
int i;
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
if (arg->num_channels > 48)
return -EINVAL;
if (arg->num_ssids > 2)
return -EINVAL;
if (arg->band > 1)
return -EINVAL;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->band);
WSM_PUT8(buf, arg->type);
WSM_PUT8(buf, arg->flags);
WSM_PUT8(buf, arg->max_tx_rate);
WSM_PUT32(buf, arg->auto_scan_interval);
WSM_PUT8(buf, arg->num_probes);
WSM_PUT8(buf, arg->num_channels);
WSM_PUT8(buf, arg->num_ssids);
WSM_PUT8(buf, arg->probe_delay);
for (i = 0; i < arg->num_channels; ++i) {
WSM_PUT16(buf, arg->ch[i].number);
WSM_PUT16(buf, 0);
WSM_PUT32(buf, arg->ch[i].min_chan_time);
WSM_PUT32(buf, arg->ch[i].max_chan_time);
WSM_PUT32(buf, 0);
}
for (i = 0; i < arg->num_ssids; ++i) {
WSM_PUT32(buf, arg->ssids[i].length);
WSM_PUT(buf, &arg->ssids[i].ssid[0],
sizeof(arg->ssids[i].ssid));
}
ret = wsm_cmd_send(priv, buf, NULL,
WSM_START_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_stop_scan(struct cw1200_common *priv)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_STOP_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
}
static int wsm_tx_confirm(struct cw1200_common *priv,
struct wsm_buf *buf,
int link_id)
{
struct wsm_tx_confirm tx_confirm;
tx_confirm.packet_id = WSM_GET32(buf);
tx_confirm.status = WSM_GET32(buf);
tx_confirm.tx_rate = WSM_GET8(buf);
tx_confirm.ack_failures = WSM_GET8(buf);
tx_confirm.flags = WSM_GET16(buf);
tx_confirm.media_delay = WSM_GET32(buf);
tx_confirm.tx_queue_delay = WSM_GET32(buf);
cw1200_tx_confirm_cb(priv, link_id, &tx_confirm);
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
static int wsm_multi_tx_confirm(struct cw1200_common *priv,
struct wsm_buf *buf, int link_id)
{
int ret;
int count;
int i;
count = WSM_GET32(buf);
if (WARN_ON(count <= 0))
return -EINVAL;
if (count > 1) {
/* We already released one buffer, now for the rest */
ret = wsm_release_tx_buffer(priv, count - 1);
if (ret < 0)
return ret;
else if (ret > 0)
cw1200_bh_wakeup(priv);
}
cw1200_debug_txed_multi(priv, count);
for (i = 0; i < count; ++i) {
ret = wsm_tx_confirm(priv, buf, link_id);
if (ret)
return ret;
}
return ret;
underflow:
WARN_ON(1);
return -EINVAL;
}
/* ******************************************************************** */
static int wsm_join_confirm(struct cw1200_common *priv,
struct wsm_join_cnf *arg,
struct wsm_buf *buf)
{
arg->status = WSM_GET32(buf);
if (WARN_ON(arg->status) != WSM_STATUS_SUCCESS)
return -EINVAL;
arg->min_power_level = WSM_GET32(buf);
arg->max_power_level = WSM_GET32(buf);
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
int wsm_join(struct cw1200_common *priv, struct wsm_join *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
struct wsm_join_cnf resp;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->mode);
WSM_PUT8(buf, arg->band);
WSM_PUT16(buf, arg->channel_number);
WSM_PUT(buf, &arg->bssid[0], sizeof(arg->bssid));
WSM_PUT16(buf, arg->atim_window);
WSM_PUT8(buf, arg->preamble_type);
WSM_PUT8(buf, arg->probe_for_join);
WSM_PUT8(buf, arg->dtim_period);
WSM_PUT8(buf, arg->flags);
WSM_PUT32(buf, arg->ssid_len);
WSM_PUT(buf, &arg->ssid[0], sizeof(arg->ssid));
WSM_PUT32(buf, arg->beacon_interval);
WSM_PUT32(buf, arg->basic_rate_set);
priv->tx_burst_idx = -1;
ret = wsm_cmd_send(priv, buf, &resp,
WSM_JOIN_REQ_ID, WSM_CMD_TIMEOUT);
/* TODO: Update state based on resp.min|max_power_level */
priv->join_complete_status = resp.status;
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_set_bss_params(struct cw1200_common *priv,
const struct wsm_set_bss_params *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT8(buf, (arg->reset_beacon_loss ? 0x1 : 0));
WSM_PUT8(buf, arg->beacon_lost_count);
WSM_PUT16(buf, arg->aid);
WSM_PUT32(buf, arg->operational_rate_set);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_SET_BSS_PARAMS_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_add_key(struct cw1200_common *priv, const struct wsm_add_key *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT(buf, arg, sizeof(*arg));
ret = wsm_cmd_send(priv, buf, NULL,
WSM_ADD_KEY_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_remove_key(struct cw1200_common *priv, const struct wsm_remove_key *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->index);
WSM_PUT8(buf, 0);
WSM_PUT16(buf, 0);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_REMOVE_KEY_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_set_tx_queue_params(struct cw1200_common *priv,
const struct wsm_set_tx_queue_params *arg, u8 id)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
u8 queue_id_to_wmm_aci[] = {3, 2, 0, 1};
wsm_cmd_lock(priv);
WSM_PUT8(buf, queue_id_to_wmm_aci[id]);
WSM_PUT8(buf, 0);
WSM_PUT8(buf, arg->ackPolicy);
WSM_PUT8(buf, 0);
WSM_PUT32(buf, arg->maxTransmitLifetime);
WSM_PUT16(buf, arg->allowedMediumTime);
WSM_PUT16(buf, 0);
ret = wsm_cmd_send(priv, buf, NULL, 0x0012, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_set_edca_params(struct cw1200_common *priv,
const struct wsm_edca_params *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
/* Implemented according to specification. */
WSM_PUT16(buf, arg->params[3].cwmin);
WSM_PUT16(buf, arg->params[2].cwmin);
WSM_PUT16(buf, arg->params[1].cwmin);
WSM_PUT16(buf, arg->params[0].cwmin);
WSM_PUT16(buf, arg->params[3].cwmax);
WSM_PUT16(buf, arg->params[2].cwmax);
WSM_PUT16(buf, arg->params[1].cwmax);
WSM_PUT16(buf, arg->params[0].cwmax);
WSM_PUT8(buf, arg->params[3].aifns);
WSM_PUT8(buf, arg->params[2].aifns);
WSM_PUT8(buf, arg->params[1].aifns);
WSM_PUT8(buf, arg->params[0].aifns);
WSM_PUT16(buf, arg->params[3].txop_limit);
WSM_PUT16(buf, arg->params[2].txop_limit);
WSM_PUT16(buf, arg->params[1].txop_limit);
WSM_PUT16(buf, arg->params[0].txop_limit);
WSM_PUT32(buf, arg->params[3].max_rx_lifetime);
WSM_PUT32(buf, arg->params[2].max_rx_lifetime);
WSM_PUT32(buf, arg->params[1].max_rx_lifetime);
WSM_PUT32(buf, arg->params[0].max_rx_lifetime);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_EDCA_PARAMS_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_switch_channel(struct cw1200_common *priv,
const struct wsm_switch_channel *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->mode);
WSM_PUT8(buf, arg->switch_count);
WSM_PUT16(buf, arg->channel_number);
priv->channel_switch_in_progress = 1;
ret = wsm_cmd_send(priv, buf, NULL,
WSM_SWITCH_CHANNEL_REQ_ID, WSM_CMD_TIMEOUT);
if (ret)
priv->channel_switch_in_progress = 0;
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
priv->ps_mode_switch_in_progress = 1;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->mode);
WSM_PUT8(buf, arg->fast_psm_idle_period);
WSM_PUT8(buf, arg->ap_psm_change_period);
WSM_PUT8(buf, arg->min_auto_pspoll_period);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_SET_PM_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_start(struct cw1200_common *priv, const struct wsm_start *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT8(buf, arg->mode);
WSM_PUT8(buf, arg->band);
WSM_PUT16(buf, arg->channel_number);
WSM_PUT32(buf, arg->ct_window);
WSM_PUT32(buf, arg->beacon_interval);
WSM_PUT8(buf, arg->dtim_period);
WSM_PUT8(buf, arg->preamble);
WSM_PUT8(buf, arg->probe_delay);
WSM_PUT8(buf, arg->ssid_len);
WSM_PUT(buf, arg->ssid, sizeof(arg->ssid));
WSM_PUT32(buf, arg->basic_rate_set);
priv->tx_burst_idx = -1;
ret = wsm_cmd_send(priv, buf, NULL,
WSM_START_REQ_ID, WSM_CMD_START_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_beacon_transmit(struct cw1200_common *priv,
const struct wsm_beacon_transmit *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT32(buf, arg->enable_beaconing ? 1 : 0);
ret = wsm_cmd_send(priv, buf, NULL,
WSM_BEACON_TRANSMIT_REQ_ID, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_start_find(struct cw1200_common *priv)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
ret = wsm_cmd_send(priv, buf, NULL, 0x0019, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
}
/* ******************************************************************** */
int wsm_stop_find(struct cw1200_common *priv)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
ret = wsm_cmd_send(priv, buf, NULL, 0x001A, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
}
/* ******************************************************************** */
int wsm_map_link(struct cw1200_common *priv, const struct wsm_map_link *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
u16 cmd = 0x001C | WSM_TX_LINK_ID(arg->link_id);
wsm_cmd_lock(priv);
WSM_PUT(buf, &arg->mac_addr[0], sizeof(arg->mac_addr));
WSM_PUT16(buf, 0);
ret = wsm_cmd_send(priv, buf, NULL, cmd, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_update_ie(struct cw1200_common *priv,
const struct wsm_update_ie *arg)
{
int ret;
struct wsm_buf *buf = &priv->wsm_cmd_buf;
wsm_cmd_lock(priv);
WSM_PUT16(buf, arg->what);
WSM_PUT16(buf, arg->count);
WSM_PUT(buf, arg->ies, arg->length);
ret = wsm_cmd_send(priv, buf, NULL, 0x001B, WSM_CMD_TIMEOUT);
wsm_cmd_unlock(priv);
return ret;
nomem:
wsm_cmd_unlock(priv);
return -ENOMEM;
}
/* ******************************************************************** */
int wsm_set_probe_responder(struct cw1200_common *priv, bool enable)
{
priv->rx_filter.probeResponder = enable;
return wsm_set_rx_filter(priv, &priv->rx_filter);
}
/* ******************************************************************** */
/* WSM indication events implementation */
const char * const cw1200_fw_types[] = {
"ETF",
"WFM",
"WSM",
"HI test",
"Platform test"
};
static int wsm_startup_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
priv->wsm_caps.input_buffers = WSM_GET16(buf);
priv->wsm_caps.input_buffer_size = WSM_GET16(buf);
priv->wsm_caps.hw_id = WSM_GET16(buf);
priv->wsm_caps.hw_subid = WSM_GET16(buf);
priv->wsm_caps.status = WSM_GET16(buf);
priv->wsm_caps.fw_cap = WSM_GET16(buf);
priv->wsm_caps.fw_type = WSM_GET16(buf);
priv->wsm_caps.fw_api = WSM_GET16(buf);
priv->wsm_caps.fw_build = WSM_GET16(buf);
priv->wsm_caps.fw_ver = WSM_GET16(buf);
WSM_GET(buf, priv->wsm_caps.fw_label, sizeof(priv->wsm_caps.fw_label));
priv->wsm_caps.fw_label[sizeof(priv->wsm_caps.fw_label) - 1] = 0; /* Do not trust FW too much... */
if (WARN_ON(priv->wsm_caps.status))
return -EINVAL;
if (WARN_ON(priv->wsm_caps.fw_type > 4))
return -EINVAL;
pr_info("CW1200 WSM init done.\n"
" Input buffers: %d x %d bytes\n"
" Hardware: %d.%d\n"
" %s firmware [%s], ver: %d, build: %d,"
" api: %d, cap: 0x%.4X\n",
priv->wsm_caps.input_buffers,
priv->wsm_caps.input_buffer_size,
priv->wsm_caps.hw_id, priv->wsm_caps.hw_subid,
cw1200_fw_types[priv->wsm_caps.fw_type],
priv->wsm_caps.fw_label, priv->wsm_caps.fw_ver,
priv->wsm_caps.fw_build,
priv->wsm_caps.fw_api, priv->wsm_caps.fw_cap);
/* Disable unsupported frequency bands */
if (!(priv->wsm_caps.fw_cap & 0x1))
priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
if (!(priv->wsm_caps.fw_cap & 0x2))
priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
priv->firmware_ready = 1;
wake_up(&priv->wsm_startup_done);
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
static int wsm_receive_indication(struct cw1200_common *priv,
int link_id,
struct wsm_buf *buf,
struct sk_buff **skb_p)
{
struct wsm_rx rx;
struct ieee80211_hdr *hdr;
size_t hdr_len;
__le16 fctl;
rx.status = WSM_GET32(buf);
rx.channel_number = WSM_GET16(buf);
rx.rx_rate = WSM_GET8(buf);
rx.rcpi_rssi = WSM_GET8(buf);
rx.flags = WSM_GET32(buf);
/* FW Workaround: Drop probe resp or
beacon when RSSI is 0
*/
hdr = (struct ieee80211_hdr *)(*skb_p)->data;
if (!rx.rcpi_rssi &&
(ieee80211_is_probe_resp(hdr->frame_control) ||
ieee80211_is_beacon(hdr->frame_control)))
return 0;
/* If no RSSI subscription has been made,
* convert RCPI to RSSI here
*/
if (!priv->cqm_use_rssi)
rx.rcpi_rssi = rx.rcpi_rssi / 2 - 110;
fctl = *(__le16 *)buf->data;
hdr_len = buf->data - buf->begin;
skb_pull(*skb_p, hdr_len);
if (!rx.status && ieee80211_is_deauth(fctl)) {
if (priv->join_status == CW1200_JOIN_STATUS_STA) {
/* Shedule unjoin work */
pr_debug("[WSM] Issue unjoin command (RX).\n");
wsm_lock_tx_async(priv);
if (queue_work(priv->workqueue,
&priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
}
}
cw1200_rx_cb(priv, &rx, link_id, skb_p);
if (*skb_p)
skb_push(*skb_p, hdr_len);
return 0;
underflow:
return -EINVAL;
}
static int wsm_event_indication(struct cw1200_common *priv, struct wsm_buf *buf)
{
int first;
struct cw1200_wsm_event *event;
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
/* STA is stopped. */
return 0;
}
event = kzalloc(sizeof(struct cw1200_wsm_event), GFP_KERNEL);
if (!event)
return -ENOMEM;
event->evt.id = WSM_GET32(buf);
event->evt.data = WSM_GET32(buf);
pr_debug("[WSM] Event: %d(%d)\n",
event->evt.id, event->evt.data);
spin_lock(&priv->event_queue_lock);
first = list_empty(&priv->event_queue);
list_add_tail(&event->link, &priv->event_queue);
spin_unlock(&priv->event_queue_lock);
if (first)
queue_work(priv->workqueue, &priv->event_handler);
return 0;
underflow:
kfree(event);
return -EINVAL;
}
static int wsm_channel_switch_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
WARN_ON(WSM_GET32(buf));
priv->channel_switch_in_progress = 0;
wake_up(&priv->channel_switch_done);
wsm_unlock_tx(priv);
return 0;
underflow:
return -EINVAL;
}
static int wsm_set_pm_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
/* TODO: Check buf (struct wsm_set_pm_complete) for validity */
if (priv->ps_mode_switch_in_progress) {
priv->ps_mode_switch_in_progress = 0;
wake_up(&priv->ps_mode_switch_done);
}
return 0;
}
static int wsm_scan_started(struct cw1200_common *priv, void *arg,
struct wsm_buf *buf)
{
u32 status = WSM_GET32(buf);
if (status != WSM_STATUS_SUCCESS) {
cw1200_scan_failed_cb(priv);
return -EINVAL;
}
return 0;
underflow:
WARN_ON(1);
return -EINVAL;
}
static int wsm_scan_complete_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
struct wsm_scan_complete arg;
arg.status = WSM_GET32(buf);
arg.psm = WSM_GET8(buf);
arg.num_channels = WSM_GET8(buf);
cw1200_scan_complete_cb(priv, &arg);
return 0;
underflow:
return -EINVAL;
}
static int wsm_join_complete_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
struct wsm_join_complete arg;
arg.status = WSM_GET32(buf);
pr_debug("[WSM] Join complete indication, status: %d\n", arg.status);
cw1200_join_complete_cb(priv, &arg);
return 0;
underflow:
return -EINVAL;
}
static int wsm_find_complete_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
pr_warn("Implement find_complete_indication\n");
return 0;
}
static int wsm_ba_timeout_indication(struct cw1200_common *priv,
struct wsm_buf *buf)
{
u32 dummy;
u8 tid;
u8 dummy2;
u8 addr[ETH_ALEN];
dummy = WSM_GET32(buf);
tid = WSM_GET8(buf);
dummy2 = WSM_GET8(buf);
WSM_GET(buf, addr, ETH_ALEN);
pr_info("BlockACK timeout, tid %d, addr %pM\n",
tid, addr);
return 0;
underflow:
return -EINVAL;
}
static int wsm_suspend_resume_indication(struct cw1200_common *priv,
int link_id, struct wsm_buf *buf)
{
u32 flags;
struct wsm_suspend_resume arg;
flags = WSM_GET32(buf);
arg.link_id = link_id;
arg.stop = !(flags & 1);
arg.multicast = !!(flags & 8);
arg.queue = (flags >> 1) & 3;
cw1200_suspend_resume(priv, &arg);
return 0;
underflow:
return -EINVAL;
}
/* ******************************************************************** */
/* WSM TX */
static int wsm_cmd_send(struct cw1200_common *priv,
struct wsm_buf *buf,
void *arg, u16 cmd, long tmo)
{
size_t buf_len = buf->data - buf->begin;
int ret;
/* Don't bother if we're dead. */
if (priv->bh_error) {
ret = 0;
goto done;
}
/* Block until the cmd buffer is completed. Tortuous. */
spin_lock(&priv->wsm_cmd.lock);
while (!priv->wsm_cmd.done) {
spin_unlock(&priv->wsm_cmd.lock);
spin_lock(&priv->wsm_cmd.lock);
}
priv->wsm_cmd.done = 0;
spin_unlock(&priv->wsm_cmd.lock);
if (cmd == WSM_WRITE_MIB_REQ_ID ||
cmd == WSM_READ_MIB_REQ_ID)
pr_debug("[WSM] >>> 0x%.4X [MIB: 0x%.4X] (%zu)\n",
cmd, __le16_to_cpu(((__le16 *)buf->begin)[2]),
buf_len);
else
pr_debug("[WSM] >>> 0x%.4X (%zu)\n", cmd, buf_len);
/* Due to buggy SPI on CW1200, we need to
* pad the message by a few bytes to ensure
* that it's completely received.
*/
buf_len += 4;
/* Fill HI message header */
/* BH will add sequence number */
((__le16 *)buf->begin)[0] = __cpu_to_le16(buf_len);
((__le16 *)buf->begin)[1] = __cpu_to_le16(cmd);
spin_lock(&priv->wsm_cmd.lock);
BUG_ON(priv->wsm_cmd.ptr);
priv->wsm_cmd.ptr = buf->begin;
priv->wsm_cmd.len = buf_len;
priv->wsm_cmd.arg = arg;
priv->wsm_cmd.cmd = cmd;
spin_unlock(&priv->wsm_cmd.lock);
cw1200_bh_wakeup(priv);
/* Wait for command completion */
ret = wait_event_timeout(priv->wsm_cmd_wq,
priv->wsm_cmd.done, tmo);
if (!ret && !priv->wsm_cmd.done) {
spin_lock(&priv->wsm_cmd.lock);
priv->wsm_cmd.done = 1;
priv->wsm_cmd.ptr = NULL;
spin_unlock(&priv->wsm_cmd.lock);
if (priv->bh_error) {
/* Return ok to help system cleanup */
ret = 0;
} else {
pr_err("CMD req (0x%04x) stuck in firmware, killing BH\n", priv->wsm_cmd.cmd);
print_hex_dump_bytes("REQDUMP: ", DUMP_PREFIX_NONE,
buf->begin, buf_len);
pr_err("Outstanding outgoing frames: %d\n", priv->hw_bufs_used);
/* Kill BH thread to report the error to the top layer. */
atomic_add(1, &priv->bh_term);
wake_up(&priv->bh_wq);
ret = -ETIMEDOUT;
}
} else {
spin_lock(&priv->wsm_cmd.lock);
BUG_ON(!priv->wsm_cmd.done);
ret = priv->wsm_cmd.ret;
spin_unlock(&priv->wsm_cmd.lock);
}
done:
wsm_buf_reset(buf);
return ret;
}
/* ******************************************************************** */
/* WSM TX port control */
void wsm_lock_tx(struct cw1200_common *priv)
{
wsm_cmd_lock(priv);
if (atomic_add_return(1, &priv->tx_lock) == 1) {
if (wsm_flush_tx(priv))
pr_debug("[WSM] TX is locked.\n");
}
wsm_cmd_unlock(priv);
}
void wsm_lock_tx_async(struct cw1200_common *priv)
{
if (atomic_add_return(1, &priv->tx_lock) == 1)
pr_debug("[WSM] TX is locked (async).\n");
}
bool wsm_flush_tx(struct cw1200_common *priv)
{
unsigned long timestamp = jiffies;
bool pending = false;
long timeout;
int i;
/* Flush must be called with TX lock held. */
BUG_ON(!atomic_read(&priv->tx_lock));
/* First check if we really need to do something.
* It is safe to use unprotected access, as hw_bufs_used
* can only decrements.
*/
if (!priv->hw_bufs_used)
return true;
if (priv->bh_error) {
/* In case of failure do not wait for magic. */
pr_err("[WSM] Fatal error occurred, will not flush TX.\n");
return false;
} else {
/* Get a timestamp of "oldest" frame */
for (i = 0; i < 4; ++i)
pending |= cw1200_queue_get_xmit_timestamp(
&priv->tx_queue[i],
&timestamp, 0xffffffff);
/* If there's nothing pending, we're good */
if (!pending)
return true;
timeout = timestamp + WSM_CMD_LAST_CHANCE_TIMEOUT - jiffies;
if (timeout < 0 || wait_event_timeout(priv->bh_evt_wq,
!priv->hw_bufs_used,
timeout) <= 0) {
/* Hmmm... Not good. Frame had stuck in firmware. */
priv->bh_error = 1;
wiphy_err(priv->hw->wiphy, "[WSM] TX Frames (%d) stuck in firmware, killing BH\n", priv->hw_bufs_used);
wake_up(&priv->bh_wq);
return false;
}
/* Ok, everything is flushed. */
return true;
}
}
void wsm_unlock_tx(struct cw1200_common *priv)
{
int tx_lock;
tx_lock = atomic_sub_return(1, &priv->tx_lock);
BUG_ON(tx_lock < 0);
if (tx_lock == 0) {
if (!priv->bh_error)
cw1200_bh_wakeup(priv);
pr_debug("[WSM] TX is unlocked.\n");
}
}
/* ******************************************************************** */
/* WSM RX */
int wsm_handle_exception(struct cw1200_common *priv, u8 *data, size_t len)
{
struct wsm_buf buf;
u32 reason;
u32 reg[18];
char fname[48];
unsigned int i;
static const char * const reason_str[] = {
"undefined instruction",
"prefetch abort",
"data abort",
"unknown error",
};
buf.begin = buf.data = data;
buf.end = &buf.begin[len];
reason = WSM_GET32(&buf);
for (i = 0; i < ARRAY_SIZE(reg); ++i)
reg[i] = WSM_GET32(&buf);
WSM_GET(&buf, fname, sizeof(fname));
if (reason < 4)
wiphy_err(priv->hw->wiphy,
"Firmware exception: %s.\n",
reason_str[reason]);
else
wiphy_err(priv->hw->wiphy,
"Firmware assert at %.*s, line %d\n",
(int) sizeof(fname), fname, reg[1]);
for (i = 0; i < 12; i += 4)
wiphy_err(priv->hw->wiphy,
"R%d: 0x%.8X, R%d: 0x%.8X, R%d: 0x%.8X, R%d: 0x%.8X,\n",
i + 0, reg[i + 0], i + 1, reg[i + 1],
i + 2, reg[i + 2], i + 3, reg[i + 3]);
wiphy_err(priv->hw->wiphy,
"R12: 0x%.8X, SP: 0x%.8X, LR: 0x%.8X, PC: 0x%.8X,\n",
reg[i + 0], reg[i + 1], reg[i + 2], reg[i + 3]);
i += 4;
wiphy_err(priv->hw->wiphy,
"CPSR: 0x%.8X, SPSR: 0x%.8X\n",
reg[i + 0], reg[i + 1]);
print_hex_dump_bytes("R1: ", DUMP_PREFIX_NONE,
fname, sizeof(fname));
return 0;
underflow:
wiphy_err(priv->hw->wiphy, "Firmware exception.\n");
print_hex_dump_bytes("Exception: ", DUMP_PREFIX_NONE,
data, len);
return -EINVAL;
}
int wsm_handle_rx(struct cw1200_common *priv, u16 id,
struct wsm_hdr *wsm, struct sk_buff **skb_p)
{
int ret = 0;
struct wsm_buf wsm_buf;
int link_id = (id >> 6) & 0x0F;
/* Strip link id. */
id &= ~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX);
wsm_buf.begin = (u8 *)&wsm[0];
wsm_buf.data = (u8 *)&wsm[1];
wsm_buf.end = &wsm_buf.begin[__le16_to_cpu(wsm->len)];
pr_debug("[WSM] <<< 0x%.4X (%td)\n", id,
wsm_buf.end - wsm_buf.begin);
if (id == WSM_TX_CONFIRM_IND_ID) {
ret = wsm_tx_confirm(priv, &wsm_buf, link_id);
} else if (id == WSM_MULTI_TX_CONFIRM_ID) {
ret = wsm_multi_tx_confirm(priv, &wsm_buf, link_id);
} else if (id & 0x0400) {
void *wsm_arg;
u16 wsm_cmd;
/* Do not trust FW too much. Protection against repeated
* response and race condition removal (see above).
*/
spin_lock(&priv->wsm_cmd.lock);
wsm_arg = priv->wsm_cmd.arg;
wsm_cmd = priv->wsm_cmd.cmd &
~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX);
priv->wsm_cmd.cmd = 0xFFFF;
spin_unlock(&priv->wsm_cmd.lock);
if (WARN_ON((id & ~0x0400) != wsm_cmd)) {
/* Note that any non-zero is a fatal retcode. */
ret = -EINVAL;
goto out;
}
/* Note that wsm_arg can be NULL in case of timeout in
* wsm_cmd_send().
*/
switch (id) {
case WSM_READ_MIB_RESP_ID:
if (wsm_arg)
ret = wsm_read_mib_confirm(priv, wsm_arg,
&wsm_buf);
break;
case WSM_WRITE_MIB_RESP_ID:
if (wsm_arg)
ret = wsm_write_mib_confirm(priv, wsm_arg,
&wsm_buf);
break;
case WSM_START_SCAN_RESP_ID:
if (wsm_arg)
ret = wsm_scan_started(priv, wsm_arg, &wsm_buf);
break;
case WSM_CONFIGURATION_RESP_ID:
if (wsm_arg)
ret = wsm_configuration_confirm(priv, wsm_arg,
&wsm_buf);
break;
case WSM_JOIN_RESP_ID:
if (wsm_arg)
ret = wsm_join_confirm(priv, wsm_arg, &wsm_buf);
break;
case WSM_STOP_SCAN_RESP_ID:
case WSM_RESET_RESP_ID:
case WSM_ADD_KEY_RESP_ID:
case WSM_REMOVE_KEY_RESP_ID:
case WSM_SET_PM_RESP_ID:
case WSM_SET_BSS_PARAMS_RESP_ID:
case 0x0412: /* set_tx_queue_params */
case WSM_EDCA_PARAMS_RESP_ID:
case WSM_SWITCH_CHANNEL_RESP_ID:
case WSM_START_RESP_ID:
case WSM_BEACON_TRANSMIT_RESP_ID:
case 0x0419: /* start_find */
case 0x041A: /* stop_find */
case 0x041B: /* update_ie */
case 0x041C: /* map_link */
WARN_ON(wsm_arg != NULL);
ret = wsm_generic_confirm(priv, wsm_arg, &wsm_buf);
if (ret) {
wiphy_warn(priv->hw->wiphy,
"wsm_generic_confirm failed for request 0x%04x.\n",
id & ~0x0400);
/* often 0x407 and 0x410 occur, this means we're dead.. */
if (priv->join_status >= CW1200_JOIN_STATUS_JOINING) {
wsm_lock_tx(priv);
if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
}
}
break;
default:
wiphy_warn(priv->hw->wiphy,
"Unrecognized confirmation 0x%04x\n",
id & ~0x0400);
}
spin_lock(&priv->wsm_cmd.lock);
priv->wsm_cmd.ret = ret;
priv->wsm_cmd.done = 1;
spin_unlock(&priv->wsm_cmd.lock);
ret = 0; /* Error response from device should ne stop BH. */
wake_up(&priv->wsm_cmd_wq);
} else if (id & 0x0800) {
switch (id) {
case WSM_STARTUP_IND_ID:
ret = wsm_startup_indication(priv, &wsm_buf);
break;
case WSM_RECEIVE_IND_ID:
ret = wsm_receive_indication(priv, link_id,
&wsm_buf, skb_p);
break;
case 0x0805:
ret = wsm_event_indication(priv, &wsm_buf);
break;
case WSM_SCAN_COMPLETE_IND_ID:
ret = wsm_scan_complete_indication(priv, &wsm_buf);
break;
case 0x0808:
ret = wsm_ba_timeout_indication(priv, &wsm_buf);
break;
case 0x0809:
ret = wsm_set_pm_indication(priv, &wsm_buf);
break;
case 0x080A:
ret = wsm_channel_switch_indication(priv, &wsm_buf);
break;
case 0x080B:
ret = wsm_find_complete_indication(priv, &wsm_buf);
break;
case 0x080C:
ret = wsm_suspend_resume_indication(priv,
link_id, &wsm_buf);
break;
case 0x080F:
ret = wsm_join_complete_indication(priv, &wsm_buf);
break;
default:
pr_warn("Unrecognised WSM ID %04x\n", id);
}
} else {
WARN_ON(1);
ret = -EINVAL;
}
out:
return ret;
}
static bool wsm_handle_tx_data(struct cw1200_common *priv,
struct wsm_tx *wsm,
const struct ieee80211_tx_info *tx_info,
const struct cw1200_txpriv *txpriv,
struct cw1200_queue *queue)
{
bool handled = false;
const struct ieee80211_hdr *frame =
(struct ieee80211_hdr *)&((u8 *)wsm)[txpriv->offset];
__le16 fctl = frame->frame_control;
enum {
do_probe,
do_drop,
do_wep,
do_tx,
} action = do_tx;
switch (priv->mode) {
case NL80211_IFTYPE_STATION:
if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
action = do_tx;
else if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA)
action = do_drop;
break;
case NL80211_IFTYPE_AP:
if (!priv->join_status) {
action = do_drop;
} else if (!(BIT(txpriv->raw_link_id) &
(BIT(0) | priv->link_id_map))) {
wiphy_warn(priv->hw->wiphy,
"A frame with expired link id is dropped.\n");
action = do_drop;
}
if (cw1200_queue_get_generation(wsm->packet_id) >
CW1200_MAX_REQUEUE_ATTEMPTS) {
/* HACK!!! WSM324 firmware has tendency to requeue
* multicast frames in a loop, causing performance
* drop and high power consumption of the driver.
* In this situation it is better just to drop
* the problematic frame.
*/
wiphy_warn(priv->hw->wiphy,
"Too many attempts to requeue a frame; dropped.\n");
action = do_drop;
}
break;
case NL80211_IFTYPE_ADHOC:
if (priv->join_status != CW1200_JOIN_STATUS_IBSS)
action = do_drop;
break;
case NL80211_IFTYPE_MESH_POINT:
action = do_tx; /* TODO: Test me! */
break;
case NL80211_IFTYPE_MONITOR:
default:
action = do_drop;
break;
}
if (action == do_tx) {
if (ieee80211_is_nullfunc(fctl)) {
spin_lock(&priv->bss_loss_lock);
if (priv->bss_loss_state) {
priv->bss_loss_confirm_id = wsm->packet_id;
wsm->queue_id = WSM_QUEUE_VOICE;
}
spin_unlock(&priv->bss_loss_lock);
} else if (ieee80211_is_probe_req(fctl)) {
action = do_probe;
} else if (ieee80211_is_deauth(fctl) &&
priv->mode != NL80211_IFTYPE_AP) {
pr_debug("[WSM] Issue unjoin command due to tx deauth.\n");
wsm_lock_tx_async(priv);
if (queue_work(priv->workqueue,
&priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
} else if (ieee80211_has_protected(fctl) &&
tx_info->control.hw_key &&
tx_info->control.hw_key->keyidx != priv->wep_default_key_id &&
(tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_WEP104)) {
action = do_wep;
}
}
switch (action) {
case do_probe:
/* An interesting FW "feature". Device filters probe responses.
* The easiest way to get it back is to convert
* probe request into WSM start_scan command.
*/
pr_debug("[WSM] Convert probe request to scan.\n");
wsm_lock_tx_async(priv);
priv->pending_frame_id = wsm->packet_id;
if (queue_delayed_work(priv->workqueue,
&priv->scan.probe_work, 0) <= 0)
wsm_unlock_tx(priv);
handled = true;
break;
case do_drop:
pr_debug("[WSM] Drop frame (0x%.4X).\n", fctl);
BUG_ON(cw1200_queue_remove(queue, wsm->packet_id));
handled = true;
break;
case do_wep:
pr_debug("[WSM] Issue set_default_wep_key.\n");
wsm_lock_tx_async(priv);
priv->wep_default_key_id = tx_info->control.hw_key->keyidx;
priv->pending_frame_id = wsm->packet_id;
if (queue_work(priv->workqueue, &priv->wep_key_work) <= 0)
wsm_unlock_tx(priv);
handled = true;
break;
case do_tx:
pr_debug("[WSM] Transmit frame.\n");
break;
default:
/* Do nothing */
break;
}
return handled;
}
static int cw1200_get_prio_queue(struct cw1200_common *priv,
u32 link_id_map, int *total)
{
static const int urgent = BIT(CW1200_LINK_ID_AFTER_DTIM) |
BIT(CW1200_LINK_ID_UAPSD);
struct wsm_edca_queue_params *edca;
unsigned score, best = -1;
int winner = -1;
int queued;
int i;
/* search for a winner using edca params */
for (i = 0; i < 4; ++i) {
queued = cw1200_queue_get_num_queued(&priv->tx_queue[i],
link_id_map);
if (!queued)
continue;
*total += queued;
edca = &priv->edca.params[i];
score = ((edca->aifns + edca->cwmin) << 16) +
((edca->cwmax - edca->cwmin) *
(get_random_int() & 0xFFFF));
if (score < best && (winner < 0 || i != 3)) {
best = score;
winner = i;
}
}
/* override winner if bursting */
if (winner >= 0 && priv->tx_burst_idx >= 0 &&
winner != priv->tx_burst_idx &&
!cw1200_queue_get_num_queued(
&priv->tx_queue[winner],
link_id_map & urgent) &&
cw1200_queue_get_num_queued(
&priv->tx_queue[priv->tx_burst_idx],
link_id_map))
winner = priv->tx_burst_idx;
return winner;
}
static int wsm_get_tx_queue_and_mask(struct cw1200_common *priv,
struct cw1200_queue **queue_p,
u32 *tx_allowed_mask_p,
bool *more)
{
int idx;
u32 tx_allowed_mask;
int total = 0;
/* Search for a queue with multicast frames buffered */
if (priv->tx_multicast) {
tx_allowed_mask = BIT(CW1200_LINK_ID_AFTER_DTIM);
idx = cw1200_get_prio_queue(priv,
tx_allowed_mask, &total);
if (idx >= 0) {
*more = total > 1;
goto found;
}
}
/* Search for unicast traffic */
tx_allowed_mask = ~priv->sta_asleep_mask;
tx_allowed_mask |= BIT(CW1200_LINK_ID_UAPSD);
if (priv->sta_asleep_mask) {
tx_allowed_mask |= priv->pspoll_mask;
tx_allowed_mask &= ~BIT(CW1200_LINK_ID_AFTER_DTIM);
} else {
tx_allowed_mask |= BIT(CW1200_LINK_ID_AFTER_DTIM);
}
idx = cw1200_get_prio_queue(priv,
tx_allowed_mask, &total);
if (idx < 0)
return -ENOENT;
found:
*queue_p = &priv->tx_queue[idx];
*tx_allowed_mask_p = tx_allowed_mask;
return 0;
}
int wsm_get_tx(struct cw1200_common *priv, u8 **data,
size_t *tx_len, int *burst)
{
struct wsm_tx *wsm = NULL;
struct ieee80211_tx_info *tx_info;
struct cw1200_queue *queue = NULL;
int queue_num;
u32 tx_allowed_mask = 0;
const struct cw1200_txpriv *txpriv = NULL;
int count = 0;
/* More is used only for broadcasts. */
bool more = false;
if (priv->wsm_cmd.ptr) { /* CMD request */
++count;
spin_lock(&priv->wsm_cmd.lock);
BUG_ON(!priv->wsm_cmd.ptr);
*data = priv->wsm_cmd.ptr;
*tx_len = priv->wsm_cmd.len;
*burst = 1;
spin_unlock(&priv->wsm_cmd.lock);
} else {
for (;;) {
int ret;
if (atomic_add_return(0, &priv->tx_lock))
break;
spin_lock_bh(&priv->ps_state_lock);
ret = wsm_get_tx_queue_and_mask(priv, &queue,
&tx_allowed_mask, &more);
queue_num = queue - priv->tx_queue;
if (priv->buffered_multicasts &&
(ret || !more) &&
(priv->tx_multicast || !priv->sta_asleep_mask)) {
priv->buffered_multicasts = false;
if (priv->tx_multicast) {
priv->tx_multicast = false;
queue_work(priv->workqueue,
&priv->multicast_stop_work);
}
}
spin_unlock_bh(&priv->ps_state_lock);
if (ret)
break;
if (cw1200_queue_get(queue,
tx_allowed_mask,
&wsm, &tx_info, &txpriv))
continue;
if (wsm_handle_tx_data(priv, wsm,
tx_info, txpriv, queue))
continue; /* Handled by WSM */
wsm->hdr.id &= __cpu_to_le16(
~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX));
wsm->hdr.id |= cpu_to_le16(
WSM_TX_LINK_ID(txpriv->raw_link_id));
priv->pspoll_mask &= ~BIT(txpriv->raw_link_id);
*data = (u8 *)wsm;
*tx_len = __le16_to_cpu(wsm->hdr.len);
/* allow bursting if txop is set */
if (priv->edca.params[queue_num].txop_limit)
*burst = min(*burst,
(int)cw1200_queue_get_num_queued(queue, tx_allowed_mask) + 1);
else
*burst = 1;
/* store index of bursting queue */
if (*burst > 1)
priv->tx_burst_idx = queue_num;
else
priv->tx_burst_idx = -1;
if (more) {
struct ieee80211_hdr *hdr =
(struct ieee80211_hdr *)
&((u8 *)wsm)[txpriv->offset];
/* more buffered multicast/broadcast frames
* ==> set MoreData flag in IEEE 802.11 header
* to inform PS STAs
*/
hdr->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
}
pr_debug("[WSM] >>> 0x%.4X (%zu) %p %c\n",
0x0004, *tx_len, *data,
wsm->more ? 'M' : ' ');
++count;
break;
}
}
return count;
}
void wsm_txed(struct cw1200_common *priv, u8 *data)
{
if (data == priv->wsm_cmd.ptr) {
spin_lock(&priv->wsm_cmd.lock);
priv->wsm_cmd.ptr = NULL;
spin_unlock(&priv->wsm_cmd.lock);
}
}
/* ******************************************************************** */
/* WSM buffer */
void wsm_buf_init(struct wsm_buf *buf)
{
BUG_ON(buf->begin);
buf->begin = kmalloc(FWLOAD_BLOCK_SIZE, GFP_KERNEL | GFP_DMA);
buf->end = buf->begin ? &buf->begin[FWLOAD_BLOCK_SIZE] : buf->begin;
wsm_buf_reset(buf);
}
void wsm_buf_deinit(struct wsm_buf *buf)
{
kfree(buf->begin);
buf->begin = buf->data = buf->end = NULL;
}
static void wsm_buf_reset(struct wsm_buf *buf)
{
if (buf->begin) {
buf->data = &buf->begin[4];
*(u32 *)buf->begin = 0;
} else {
buf->data = buf->begin;
}
}
static int wsm_buf_reserve(struct wsm_buf *buf, size_t extra_size)
{
size_t pos = buf->data - buf->begin;
size_t size = pos + extra_size;
size = round_up(size, FWLOAD_BLOCK_SIZE);
buf->begin = krealloc(buf->begin, size, GFP_KERNEL | GFP_DMA);
if (buf->begin) {
buf->data = &buf->begin[pos];
buf->end = &buf->begin[size];
return 0;
} else {
buf->end = buf->data = buf->begin;
return -ENOMEM;
}
}
Reference in New Issue View Git Blame Copy Permalink