// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* WSM host interface (HI) implementation for
|
* ST-Ericsson CW1200 mac80211 drivers.
|
*
|
* Copyright (c) 2010, ST-Ericsson
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* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
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*/
|
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#include <linux/skbuff.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/random.h>
|
|
#include "cw1200.h"
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#include "wsm.h"
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#include "bh.h"
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#include "sta.h"
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#include "debug.h"
|
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#define WSM_CMD_TIMEOUT (2 * HZ) /* With respect to interrupt loss */
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#define WSM_CMD_START_TIMEOUT (7 * HZ)
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#define WSM_CMD_RESET_TIMEOUT (3 * HZ) /* 2 sec. timeout was observed. */
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#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) \
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goto underflow; \
|
memcpy(ptr, (buf)->data, size); \
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(buf)->data += size; \
|
} while (0)
|
|
#define __WSM_GET(buf, type, type2, cvt) \
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({ \
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type val; \
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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))
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#define WSM_GET16(buf) __WSM_GET(buf, u16, __le16, __le16_to_cpu)
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#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) \
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if (wsm_buf_reserve((buf), size)) \
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goto nomem; \
|
memcpy((buf)->data, ptr, size); \
|
(buf)->data += size; \
|
} while (0)
|
|
#define __WSM_PUT(buf, val, type, type2, cvt) \
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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); \
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} while (0)
|
|
#define WSM_PUT8(buf, val) __WSM_PUT(buf, val, u8, u8, (u8))
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#define WSM_PUT16(buf, val) __WSM_PUT(buf, val, u16, __le16, __cpu_to_le16)
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#define WSM_PUT32(buf, val) __WSM_PUT(buf, val, u32, __le32, __cpu_to_le32)
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static void wsm_buf_reset(struct wsm_buf *buf);
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static int wsm_buf_reserve(struct wsm_buf *buf, size_t extra_size);
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static int wsm_cmd_send(struct cw1200_common *priv,
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struct wsm_buf *buf,
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void *arg, u16 cmd, long tmo);
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#define wsm_cmd_lock(__priv) mutex_lock(&((__priv)->wsm_cmd_mux))
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#define wsm_cmd_unlock(__priv) mutex_unlock(&((__priv)->wsm_cmd_mux))
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/* ******************************************************************** */
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/* WSM API implementation */
|
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static int wsm_generic_confirm(struct cw1200_common *priv,
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void *arg,
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struct wsm_buf *buf)
|
{
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u32 status = WSM_GET32(buf);
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if (status != WSM_STATUS_SUCCESS)
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return -EINVAL;
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return 0;
|
|
underflow:
|
WARN_ON(1);
|
return -EINVAL;
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}
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int wsm_configuration(struct cw1200_common *priv, struct wsm_configuration *arg)
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{
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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|
wsm_cmd_lock(priv);
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WSM_PUT32(buf, arg->dot11MaxTransmitMsduLifeTime);
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WSM_PUT32(buf, arg->dot11MaxReceiveLifeTime);
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WSM_PUT32(buf, arg->dot11RtsThreshold);
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/* DPD block. */
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WSM_PUT16(buf, arg->dpdData_size + 12);
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WSM_PUT16(buf, 1); /* DPD version */
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WSM_PUT(buf, arg->dot11StationId, ETH_ALEN);
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WSM_PUT16(buf, 5); /* DPD flags */
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WSM_PUT(buf, arg->dpdData, arg->dpdData_size);
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ret = wsm_cmd_send(priv, buf, arg,
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WSM_CONFIGURATION_REQ_ID, WSM_CMD_TIMEOUT);
|
|
wsm_cmd_unlock(priv);
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return ret;
|
|
nomem:
|
wsm_cmd_unlock(priv);
|
return -ENOMEM;
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}
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static int wsm_configuration_confirm(struct cw1200_common *priv,
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struct wsm_configuration *arg,
|
struct wsm_buf *buf)
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{
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int i;
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int status;
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status = WSM_GET32(buf);
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if (WARN_ON(status != WSM_STATUS_SUCCESS))
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return -EINVAL;
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WSM_GET(buf, arg->dot11StationId, ETH_ALEN);
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arg->dot11FrequencyBandsSupported = WSM_GET8(buf);
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WSM_SKIP(buf, 1);
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arg->supportedRateMask = WSM_GET32(buf);
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for (i = 0; i < 2; ++i) {
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arg->txPowerRange[i].min_power_level = WSM_GET32(buf);
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arg->txPowerRange[i].max_power_level = WSM_GET32(buf);
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arg->txPowerRange[i].stepping = WSM_GET32(buf);
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}
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return 0;
|
|
underflow:
|
WARN_ON(1);
|
return -EINVAL;
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}
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/* ******************************************************************** */
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int wsm_reset(struct cw1200_common *priv, const struct wsm_reset *arg)
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{
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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u16 cmd = WSM_RESET_REQ_ID | WSM_TX_LINK_ID(arg->link_id);
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wsm_cmd_lock(priv);
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WSM_PUT32(buf, arg->reset_statistics ? 0 : 1);
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ret = wsm_cmd_send(priv, buf, NULL, cmd, WSM_CMD_RESET_TIMEOUT);
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wsm_cmd_unlock(priv);
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return ret;
|
|
nomem:
|
wsm_cmd_unlock(priv);
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return -ENOMEM;
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}
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/* ******************************************************************** */
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struct wsm_mib {
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u16 mib_id;
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void *buf;
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size_t buf_size;
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};
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int wsm_read_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
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size_t buf_size)
|
{
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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struct wsm_mib mib_buf = {
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.mib_id = mib_id,
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.buf = _buf,
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.buf_size = buf_size,
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};
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wsm_cmd_lock(priv);
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WSM_PUT16(buf, mib_id);
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WSM_PUT16(buf, 0);
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ret = wsm_cmd_send(priv, buf, &mib_buf,
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WSM_READ_MIB_REQ_ID, WSM_CMD_TIMEOUT);
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wsm_cmd_unlock(priv);
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return ret;
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|
nomem:
|
wsm_cmd_unlock(priv);
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return -ENOMEM;
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}
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static int wsm_read_mib_confirm(struct cw1200_common *priv,
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struct wsm_mib *arg,
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struct wsm_buf *buf)
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{
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u16 size;
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if (WARN_ON(WSM_GET32(buf) != WSM_STATUS_SUCCESS))
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return -EINVAL;
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if (WARN_ON(WSM_GET16(buf) != arg->mib_id))
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return -EINVAL;
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size = WSM_GET16(buf);
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if (size > arg->buf_size)
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size = arg->buf_size;
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WSM_GET(buf, arg->buf, size);
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arg->buf_size = size;
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return 0;
|
|
underflow:
|
WARN_ON(1);
|
return -EINVAL;
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}
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/* ******************************************************************** */
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int wsm_write_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
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size_t buf_size)
|
{
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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struct wsm_mib mib_buf = {
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.mib_id = mib_id,
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.buf = _buf,
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.buf_size = buf_size,
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};
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wsm_cmd_lock(priv);
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WSM_PUT16(buf, mib_id);
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WSM_PUT16(buf, buf_size);
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WSM_PUT(buf, _buf, buf_size);
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ret = wsm_cmd_send(priv, buf, &mib_buf,
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WSM_WRITE_MIB_REQ_ID, WSM_CMD_TIMEOUT);
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wsm_cmd_unlock(priv);
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return ret;
|
|
nomem:
|
wsm_cmd_unlock(priv);
|
return -ENOMEM;
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}
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static int wsm_write_mib_confirm(struct cw1200_common *priv,
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struct wsm_mib *arg,
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struct wsm_buf *buf)
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{
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int ret;
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ret = wsm_generic_confirm(priv, arg, buf);
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if (ret)
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return ret;
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if (arg->mib_id == WSM_MIB_ID_OPERATIONAL_POWER_MODE) {
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/* OperationalMode: update PM status. */
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const char *p = arg->buf;
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cw1200_enable_powersave(priv, (p[0] & 0x0F) ? true : false);
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}
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return 0;
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}
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/* ******************************************************************** */
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int wsm_scan(struct cw1200_common *priv, const struct wsm_scan *arg)
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{
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int i;
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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if (arg->num_channels > 48)
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return -EINVAL;
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if (arg->num_ssids > 2)
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return -EINVAL;
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if (arg->band > 1)
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return -EINVAL;
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wsm_cmd_lock(priv);
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WSM_PUT8(buf, arg->band);
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WSM_PUT8(buf, arg->type);
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WSM_PUT8(buf, arg->flags);
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WSM_PUT8(buf, arg->max_tx_rate);
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WSM_PUT32(buf, arg->auto_scan_interval);
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WSM_PUT8(buf, arg->num_probes);
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WSM_PUT8(buf, arg->num_channels);
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WSM_PUT8(buf, arg->num_ssids);
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WSM_PUT8(buf, arg->probe_delay);
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for (i = 0; i < arg->num_channels; ++i) {
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WSM_PUT16(buf, arg->ch[i].number);
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WSM_PUT16(buf, 0);
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WSM_PUT32(buf, arg->ch[i].min_chan_time);
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WSM_PUT32(buf, arg->ch[i].max_chan_time);
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WSM_PUT32(buf, 0);
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}
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for (i = 0; i < arg->num_ssids; ++i) {
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WSM_PUT32(buf, arg->ssids[i].length);
|
WSM_PUT(buf, &arg->ssids[i].ssid[0],
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sizeof(arg->ssids[i].ssid));
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}
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ret = wsm_cmd_send(priv, buf, NULL,
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WSM_START_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
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wsm_cmd_unlock(priv);
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return ret;
|
|
nomem:
|
wsm_cmd_unlock(priv);
|
return -ENOMEM;
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}
|
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/* ******************************************************************** */
|
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int wsm_stop_scan(struct cw1200_common *priv)
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{
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int ret;
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struct wsm_buf *buf = &priv->wsm_cmd_buf;
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wsm_cmd_lock(priv);
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ret = wsm_cmd_send(priv, buf, NULL,
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WSM_STOP_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
|
wsm_cmd_unlock(priv);
|
return ret;
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}
|
|
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static int wsm_tx_confirm(struct cw1200_common *priv,
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struct wsm_buf *buf,
|
int link_id)
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{
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struct wsm_tx_confirm tx_confirm;
|
|
tx_confirm.packet_id = WSM_GET32(buf);
|
tx_confirm.status = WSM_GET32(buf);
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tx_confirm.tx_rate = WSM_GET8(buf);
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tx_confirm.ack_failures = WSM_GET8(buf);
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tx_confirm.flags = WSM_GET16(buf);
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tx_confirm.media_delay = WSM_GET32(buf);
|
tx_confirm.tx_queue_delay = WSM_GET32(buf);
|
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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;
|
|
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);
|
do {
|
ret = wsm_tx_confirm(priv, buf, link_id);
|
} while (!ret && --count);
|
|
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[NL80211_BAND_2GHZ] = NULL;
|
if (!(priv->wsm_caps.fw_cap & 0x2))
|
priv->hw->wiphy->bands[NL80211_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)
|
{
|
u8 tid;
|
u8 addr[ETH_ALEN];
|
|
WSM_GET32(buf);
|
tid = WSM_GET8(buf);
|
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],
|
×tamp, 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;
|
u8 *tmp;
|
|
size = round_up(size, FWLOAD_BLOCK_SIZE);
|
|
tmp = krealloc(buf->begin, size, GFP_KERNEL | GFP_DMA);
|
if (!tmp) {
|
wsm_buf_deinit(buf);
|
return -ENOMEM;
|
}
|
|
buf->begin = tmp;
|
buf->data = &buf->begin[pos];
|
buf->end = &buf->begin[size];
|
return 0;
|
}
|
