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1817 lines
43 KiB
1817 lines
43 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* WSM host interface (HI) implementation for |
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* ST-Ericsson CW1200 mac80211 drivers. |
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* |
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* Copyright (c) 2010, ST-Ericsson |
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* Author: Dmitry Tarnyagin <[email protected]> |
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*/ |
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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> |
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|
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#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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|
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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) |
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|
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#define WSM_SKIP(buf, size) \ |
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do { \ |
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if ((buf)->data + size > (buf)->end) \ |
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goto underflow; \ |
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(buf)->data += size; \ |
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} while (0) |
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|
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#define WSM_GET(buf, ptr, size) \ |
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do { \ |
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if ((buf)->data + size > (buf)->end) \ |
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goto underflow; \ |
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memcpy(ptr, (buf)->data, size); \ |
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(buf)->data += size; \ |
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} while (0) |
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|
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#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) \ |
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goto underflow; \ |
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val = cvt(*(type2 *)(buf)->data); \ |
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(buf)->data += sizeof(type); \ |
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val; \ |
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}) |
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|
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#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) |
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|
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#define WSM_PUT(buf, ptr, size) \ |
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do { \ |
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if ((buf)->data + size > (buf)->end) \ |
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if (wsm_buf_reserve((buf), size)) \ |
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goto nomem; \ |
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memcpy((buf)->data, ptr, size); \ |
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(buf)->data += size; \ |
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} while (0) |
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|
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#define __WSM_PUT(buf, val, type, type2, cvt) \ |
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do { \ |
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if ((buf)->data + sizeof(type) > (buf)->end) \ |
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if (wsm_buf_reserve((buf), sizeof(type))) \ |
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goto nomem; \ |
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*(type2 *)(buf)->data = cvt(val); \ |
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(buf)->data += sizeof(type); \ |
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} while (0) |
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|
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#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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|
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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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|
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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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|
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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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/* ******************************************************************** */ |
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/* WSM API implementation */ |
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|
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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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{ |
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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; |
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|
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underflow: |
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WARN_ON(1); |
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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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|
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wsm_cmd_lock(priv); |
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|
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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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|
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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); |
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|
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wsm_cmd_unlock(priv); |
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return ret; |
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|
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nomem: |
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wsm_cmd_unlock(priv); |
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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, |
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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; |
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|
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underflow: |
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WARN_ON(1); |
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return -EINVAL; |
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} |
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|
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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; |
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nomem: |
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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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{ |
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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: |
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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; |
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|
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underflow: |
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WARN_ON(1); |
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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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{ |
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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; |
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nomem: |
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wsm_cmd_unlock(priv); |
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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); |
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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; |
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nomem: |
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wsm_cmd_unlock(priv); |
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return -ENOMEM; |
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} |
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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); |
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wsm_cmd_unlock(priv); |
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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, |
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int link_id) |
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{ |
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struct wsm_tx_confirm tx_confirm; |
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|
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tx_confirm.packet_id = WSM_GET32(buf); |
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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); |
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tx_confirm.tx_queue_delay = WSM_GET32(buf); |
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cw1200_tx_confirm_cb(priv, link_id, &tx_confirm); |
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return 0; |
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|
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underflow: |
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WARN_ON(1); |
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return -EINVAL; |
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} |
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static int wsm_multi_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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int ret; |
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int count; |
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|
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count = WSM_GET32(buf); |
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if (WARN_ON(count <= 0)) |
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return -EINVAL; |
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|
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if (count > 1) { |
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/* We already released one buffer, now for the rest */ |
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ret = wsm_release_tx_buffer(priv, count - 1); |
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if (ret < 0) |
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return ret; |
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else if (ret > 0) |
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cw1200_bh_wakeup(priv); |
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} |
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cw1200_debug_txed_multi(priv, count); |
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do { |
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ret = wsm_tx_confirm(priv, buf, link_id); |
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} while (!ret && --count); |
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return ret; |
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|
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underflow: |
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WARN_ON(1); |
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return -EINVAL; |
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} |
|
|
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/* ******************************************************************** */ |
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|
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static int wsm_join_confirm(struct cw1200_common *priv, |
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struct wsm_join_cnf *arg, |
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struct wsm_buf *buf) |
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{ |
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arg->status = WSM_GET32(buf); |
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if (WARN_ON(arg->status) != WSM_STATUS_SUCCESS) |
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return -EINVAL; |
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arg->min_power_level = WSM_GET32(buf); |
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arg->max_power_level = WSM_GET32(buf); |
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return 0; |
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|
|
underflow: |
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WARN_ON(1); |
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return -EINVAL; |
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} |
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int wsm_join(struct cw1200_common *priv, struct wsm_join *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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struct wsm_join_cnf resp; |
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wsm_cmd_lock(priv); |
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|
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WSM_PUT8(buf, arg->mode); |
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WSM_PUT8(buf, arg->band); |
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WSM_PUT16(buf, arg->channel_number); |
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WSM_PUT(buf, &arg->bssid[0], sizeof(arg->bssid)); |
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WSM_PUT16(buf, arg->atim_window); |
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WSM_PUT8(buf, arg->preamble_type); |
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WSM_PUT8(buf, arg->probe_for_join); |
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WSM_PUT8(buf, arg->dtim_period); |
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WSM_PUT8(buf, arg->flags); |
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WSM_PUT32(buf, arg->ssid_len); |
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WSM_PUT(buf, &arg->ssid[0], sizeof(arg->ssid)); |
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WSM_PUT32(buf, arg->beacon_interval); |
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WSM_PUT32(buf, arg->basic_rate_set); |
|
|
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priv->tx_burst_idx = -1; |
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ret = wsm_cmd_send(priv, buf, &resp, |
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WSM_JOIN_REQ_ID, WSM_CMD_TIMEOUT); |
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/* TODO: Update state based on resp.min|max_power_level */ |
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|
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priv->join_complete_status = resp.status; |
|
|
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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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int wsm_set_bss_params(struct cw1200_common *priv, |
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const struct wsm_set_bss_params *arg) |
|
{ |
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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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|
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WSM_PUT8(buf, (arg->reset_beacon_loss ? 0x1 : 0)); |
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WSM_PUT8(buf, arg->beacon_lost_count); |
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WSM_PUT16(buf, arg->aid); |
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WSM_PUT32(buf, arg->operational_rate_set); |
|
|
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ret = wsm_cmd_send(priv, buf, NULL, |
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WSM_SET_BSS_PARAMS_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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int wsm_add_key(struct cw1200_common *priv, const struct wsm_add_key *arg) |
|
{ |
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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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|
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WSM_PUT(buf, arg, sizeof(*arg)); |
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|
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ret = wsm_cmd_send(priv, buf, NULL, |
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WSM_ADD_KEY_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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int wsm_remove_key(struct cw1200_common *priv, const struct wsm_remove_key *arg) |
|
{ |
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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_PUT8(buf, arg->index); |
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WSM_PUT8(buf, 0); |
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WSM_PUT16(buf, 0); |
|
|
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ret = wsm_cmd_send(priv, buf, NULL, |
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WSM_REMOVE_KEY_REQ_ID, WSM_CMD_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; |
|
} |
|
|
|
/* ******************************************************************** */ |
|
|
|
int wsm_set_tx_queue_params(struct cw1200_common *priv, |
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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}; |
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|
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wsm_cmd_lock(priv); |
|
|
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WSM_PUT8(buf, queue_id_to_wmm_aci[id]); |
|
WSM_PUT8(buf, 0); |
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WSM_PUT8(buf, arg->ackPolicy); |
|
WSM_PUT8(buf, 0); |
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WSM_PUT32(buf, arg->maxTransmitLifetime); |
|
WSM_PUT16(buf, arg->allowedMediumTime); |
|
WSM_PUT16(buf, 0); |
|
|
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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_inc(&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_inc_return(&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_inc_return(&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_dec_return(&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; |
|
}
|
|
|