diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k')
26 files changed, 6616 insertions, 131 deletions
diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig index 5774cea23a3..35f23bdc442 100644 --- a/drivers/net/wireless/ath/ath9k/Kconfig +++ b/drivers/net/wireless/ath/ath9k/Kconfig @@ -32,3 +32,24 @@ config ATH9K_DEBUGFS Also required for changing debug message flags at run time. +config ATH9K_HTC + tristate "Atheros HTC based wireless cards support" + depends on USB && MAC80211 + select ATH9K_HW + select MAC80211_LEDS + select LEDS_CLASS + select NEW_LEDS + select ATH9K_COMMON + ---help--- + Support for Atheros HTC based cards. + Chipsets supported: AR9271 + + For more information: http://wireless.kernel.org/en/users/Drivers/ath9k_htc + + The built module will be ath9k_htc. + +config ATH9K_HTC_DEBUGFS + bool "Atheros ath9k_htc debugging" + depends on ATH9K_HTC && DEBUG_FS + ---help--- + Say Y, if you need access to ath9k_htc's statistics. diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile index 6b50d5eb9ec..97133beda26 100644 --- a/drivers/net/wireless/ath/ath9k/Makefile +++ b/drivers/net/wireless/ath/ath9k/Makefile @@ -28,3 +28,13 @@ obj-$(CONFIG_ATH9K_HW) += ath9k_hw.o obj-$(CONFIG_ATH9K_COMMON) += ath9k_common.o ath9k_common-y:= common.o + +ath9k_htc-y += htc_hst.o \ + hif_usb.o \ + wmi.o \ + htc_drv_txrx.o \ + htc_drv_main.o \ + htc_drv_beacon.o \ + htc_drv_init.o + +obj-$(CONFIG_ATH9K_HTC) += ath9k_htc.o diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c index 238a5744d8e..d5026e4f484 100644 --- a/drivers/net/wireless/ath/ath9k/calib.c +++ b/drivers/net/wireless/ath/ath9k/calib.c @@ -101,9 +101,13 @@ static void ath9k_hw_do_getnf(struct ath_hw *ah, nf = 0 - ((nf ^ 0x1ff) + 1); ath_print(common, ATH_DBG_CALIBRATE, "NF calibrated [ctl] [chain 0] is %d\n", nf); + + if (AR_SREV_9271(ah) && (nf >= -114)) + nf = -116; + nfarray[0] = nf; - if (!AR_SREV_9285(ah)) { + if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) { if (AR_SREV_9280_10_OR_LATER(ah)) nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR); @@ -139,9 +143,13 @@ static void ath9k_hw_do_getnf(struct ath_hw *ah, nf = 0 - ((nf ^ 0x1ff) + 1); ath_print(common, ATH_DBG_CALIBRATE, "NF calibrated [ext] [chain 0] is %d\n", nf); + + if (AR_SREV_9271(ah) && (nf >= -114)) + nf = -116; + nfarray[3] = nf; - if (!AR_SREV_9285(ah)) { + if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) { if (AR_SREV_9280_10_OR_LATER(ah)) nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR); @@ -621,7 +629,7 @@ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) u8 chainmask, rx_chain_status; rx_chain_status = REG_READ(ah, AR_PHY_RX_CHAINMASK); - if (AR_SREV_9285(ah)) + if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) chainmask = 0x9; else if (AR_SREV_9280(ah) || AR_SREV_9287(ah)) { if ((rx_chain_status & 0x2) || (rx_chain_status & 0x4)) @@ -715,7 +723,7 @@ void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah) if (AR_SREV_9280(ah)) noise_floor = AR_PHY_CCA_MAX_AR9280_GOOD_VALUE; - else if (AR_SREV_9285(ah)) + else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) noise_floor = AR_PHY_CCA_MAX_AR9285_GOOD_VALUE; else if (AR_SREV_9287(ah)) noise_floor = AR_PHY_CCA_MAX_AR9287_GOOD_VALUE; @@ -1051,9 +1059,12 @@ bool ath9k_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan, /* Do NF cal only at longer intervals */ if (longcal) { /* Do periodic PAOffset Cal */ - if (AR_SREV_9271(ah)) - ath9k_hw_9271_pa_cal(ah, false); - else if (AR_SREV_9285_11_OR_LATER(ah)) { + if (AR_SREV_9271(ah)) { + if (!ah->pacal_info.skipcount) + ath9k_hw_9271_pa_cal(ah, false); + else + ah->pacal_info.skipcount--; + } else if (AR_SREV_9285_11_OR_LATER(ah)) { if (!ah->pacal_info.skipcount) ath9k_hw_9285_pa_cal(ah, false); else diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c index 4d775ae141d..7902d287f67 100644 --- a/drivers/net/wireless/ath/ath9k/common.c +++ b/drivers/net/wireless/ath/ath9k/common.c @@ -286,6 +286,427 @@ int ath9k_cmn_padpos(__le16 frame_control) } EXPORT_SYMBOL(ath9k_cmn_padpos); +int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb) +{ + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + + if (tx_info->control.hw_key) { + if (tx_info->control.hw_key->alg == ALG_WEP) + return ATH9K_KEY_TYPE_WEP; + else if (tx_info->control.hw_key->alg == ALG_TKIP) + return ATH9K_KEY_TYPE_TKIP; + else if (tx_info->control.hw_key->alg == ALG_CCMP) + return ATH9K_KEY_TYPE_AES; + } + + return ATH9K_KEY_TYPE_CLEAR; +} +EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype); + +/* + * Calculate the RX filter to be set in the HW. + */ +u32 ath9k_cmn_calcrxfilter(struct ieee80211_hw *hw, struct ath_hw *ah, + unsigned int rxfilter) +{ +#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) + + u32 rfilt; + + rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE) + | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST + | ATH9K_RX_FILTER_MCAST; + + /* If not a STA, enable processing of Probe Requests */ + if (ah->opmode != NL80211_IFTYPE_STATION) + rfilt |= ATH9K_RX_FILTER_PROBEREQ; + + /* + * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station + * mode interface or when in monitor mode. AP mode does not need this + * since it receives all in-BSS frames anyway. + */ + if (((ah->opmode != NL80211_IFTYPE_AP) && + (rxfilter & FIF_PROMISC_IN_BSS)) || + (ah->opmode == NL80211_IFTYPE_MONITOR)) + rfilt |= ATH9K_RX_FILTER_PROM; + + if (rxfilter & FIF_CONTROL) + rfilt |= ATH9K_RX_FILTER_CONTROL; + + if ((ah->opmode == NL80211_IFTYPE_STATION) && + !(rxfilter & FIF_BCN_PRBRESP_PROMISC)) + rfilt |= ATH9K_RX_FILTER_MYBEACON; + else + rfilt |= ATH9K_RX_FILTER_BEACON; + + if ((AR_SREV_9280_10_OR_LATER(ah) || + AR_SREV_9285_10_OR_LATER(ah)) && + (ah->opmode == NL80211_IFTYPE_AP) && + (rxfilter & FIF_PSPOLL)) + rfilt |= ATH9K_RX_FILTER_PSPOLL; + + if (conf_is_ht(&hw->conf)) + rfilt |= ATH9K_RX_FILTER_COMP_BAR; + + return rfilt; + +#undef RX_FILTER_PRESERVE +} +EXPORT_SYMBOL(ath9k_cmn_calcrxfilter); + +/* + * Recv initialization for opmode change. + */ +void ath9k_cmn_opmode_init(struct ieee80211_hw *hw, struct ath_hw *ah, + unsigned int rxfilter) +{ + struct ath_common *common = ath9k_hw_common(ah); + + u32 rfilt, mfilt[2]; + + /* configure rx filter */ + rfilt = ath9k_cmn_calcrxfilter(hw, ah, rxfilter); + ath9k_hw_setrxfilter(ah, rfilt); + + /* configure bssid mask */ + if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) + ath_hw_setbssidmask(common); + + /* configure operational mode */ + ath9k_hw_setopmode(ah); + + /* Handle any link-level address change. */ + ath9k_hw_setmac(ah, common->macaddr); + + /* calculate and install multicast filter */ + mfilt[0] = mfilt[1] = ~0; + ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); +} +EXPORT_SYMBOL(ath9k_cmn_opmode_init); + +static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan, + enum nl80211_channel_type channel_type) +{ + u32 chanmode = 0; + + switch (chan->band) { + case IEEE80211_BAND_2GHZ: + switch (channel_type) { + case NL80211_CHAN_NO_HT: + case NL80211_CHAN_HT20: + chanmode = CHANNEL_G_HT20; + break; + case NL80211_CHAN_HT40PLUS: + chanmode = CHANNEL_G_HT40PLUS; + break; + case NL80211_CHAN_HT40MINUS: + chanmode = CHANNEL_G_HT40MINUS; + break; + } + break; + case IEEE80211_BAND_5GHZ: + switch (channel_type) { + case NL80211_CHAN_NO_HT: + case NL80211_CHAN_HT20: + chanmode = CHANNEL_A_HT20; + break; + case NL80211_CHAN_HT40PLUS: + chanmode = CHANNEL_A_HT40PLUS; + break; + case NL80211_CHAN_HT40MINUS: + chanmode = CHANNEL_A_HT40MINUS; + break; + } + break; + default: + break; + } + + return chanmode; +} + +/* + * Update internal channel flags. + */ +void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw, + struct ath9k_channel *ichan) +{ + struct ieee80211_channel *chan = hw->conf.channel; + struct ieee80211_conf *conf = &hw->conf; + + ichan->channel = chan->center_freq; + ichan->chan = chan; + + if (chan->band == IEEE80211_BAND_2GHZ) { + ichan->chanmode = CHANNEL_G; + ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G; + } else { + ichan->chanmode = CHANNEL_A; + ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM; + } + + if (conf_is_ht(conf)) + ichan->chanmode = ath9k_get_extchanmode(chan, + conf->channel_type); +} +EXPORT_SYMBOL(ath9k_cmn_update_ichannel); + +/* + * Get the internal channel reference. + */ +struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw, + struct ath_hw *ah) +{ + struct ieee80211_channel *curchan = hw->conf.channel; + struct ath9k_channel *channel; + u8 chan_idx; + + chan_idx = curchan->hw_value; + channel = &ah->channels[chan_idx]; + ath9k_cmn_update_ichannel(hw, channel); + + return channel; +} +EXPORT_SYMBOL(ath9k_cmn_get_curchannel); + +static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key, + struct ath9k_keyval *hk, const u8 *addr, + bool authenticator) +{ + struct ath_hw *ah = common->ah; + const u8 *key_rxmic; + const u8 *key_txmic; + + key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY; + key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY; + + if (addr == NULL) { + /* + * Group key installation - only two key cache entries are used + * regardless of splitmic capability since group key is only + * used either for TX or RX. + */ + if (authenticator) { + memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); + memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic)); + } else { + memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); + memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic)); + } + return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr); + } + if (!common->splitmic) { + /* TX and RX keys share the same key cache entry. */ + memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); + memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic)); + return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr); + } + + /* Separate key cache entries for TX and RX */ + + /* TX key goes at first index, RX key at +32. */ + memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); + if (!ath9k_hw_set_keycache_entry(ah, keyix, hk, NULL)) { + /* TX MIC entry failed. No need to proceed further */ + ath_print(common, ATH_DBG_FATAL, + "Setting TX MIC Key Failed\n"); + return 0; + } + + memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); + /* XXX delete tx key on failure? */ + return ath9k_hw_set_keycache_entry(ah, keyix + 32, hk, addr); +} + +static int ath_reserve_key_cache_slot_tkip(struct ath_common *common) +{ + int i; + + for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) { + if (test_bit(i, common->keymap) || + test_bit(i + 64, common->keymap)) + continue; /* At least one part of TKIP key allocated */ + if (common->splitmic && + (test_bit(i + 32, common->keymap) || + test_bit(i + 64 + 32, common->keymap))) + continue; /* At least one part of TKIP key allocated */ + + /* Found a free slot for a TKIP key */ + return i; + } + return -1; +} + +static int ath_reserve_key_cache_slot(struct ath_common *common) +{ + int i; + + /* First, try to find slots that would not be available for TKIP. */ + if (common->splitmic) { + for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) { + if (!test_bit(i, common->keymap) && + (test_bit(i + 32, common->keymap) || + test_bit(i + 64, common->keymap) || + test_bit(i + 64 + 32, common->keymap))) + return i; + if (!test_bit(i + 32, common->keymap) && + (test_bit(i, common->keymap) || + test_bit(i + 64, common->keymap) || + test_bit(i + 64 + 32, common->keymap))) + return i + 32; + if (!test_bit(i + 64, common->keymap) && + (test_bit(i , common->keymap) || + test_bit(i + 32, common->keymap) || + test_bit(i + 64 + 32, common->keymap))) + return i + 64; + if (!test_bit(i + 64 + 32, common->keymap) && + (test_bit(i, common->keymap) || + test_bit(i + 32, common->keymap) || + test_bit(i + 64, common->keymap))) + return i + 64 + 32; + } + } else { + for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) { + if (!test_bit(i, common->keymap) && + test_bit(i + 64, common->keymap)) + return i; + if (test_bit(i, common->keymap) && + !test_bit(i + 64, common->keymap)) + return i + 64; + } + } + + /* No partially used TKIP slots, pick any available slot */ + for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) { + /* Do not allow slots that could be needed for TKIP group keys + * to be used. This limitation could be removed if we know that + * TKIP will not be used. */ + if (i >= 64 && i < 64 + IEEE80211_WEP_NKID) + continue; + if (common->splitmic) { + if (i >= 32 && i < 32 + IEEE80211_WEP_NKID) + continue; + if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID) + continue; + } + + if (!test_bit(i, common->keymap)) + return i; /* Found a free slot for a key */ + } + + /* No free slot found */ + return -1; +} + +/* + * Configure encryption in the HW. + */ +int ath9k_cmn_key_config(struct ath_common *common, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + struct ath_hw *ah = common->ah; + struct ath9k_keyval hk; + const u8 *mac = NULL; + int ret = 0; + int idx; + + memset(&hk, 0, sizeof(hk)); + + switch (key->alg) { + case ALG_WEP: + hk.kv_type = ATH9K_CIPHER_WEP; + break; + case ALG_TKIP: + hk.kv_type = ATH9K_CIPHER_TKIP; + break; + case ALG_CCMP: + hk.kv_type = ATH9K_CIPHER_AES_CCM; + break; + default: + return -EOPNOTSUPP; + } + + hk.kv_len = key->keylen; + memcpy(hk.kv_val, key->key, key->keylen); + + if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { + /* For now, use the default keys for broadcast keys. This may + * need to change with virtual interfaces. */ + idx = key->keyidx; + } else if (key->keyidx) { + if (WARN_ON(!sta)) + return -EOPNOTSUPP; + mac = sta->addr; + + if (vif->type != NL80211_IFTYPE_AP) { + /* Only keyidx 0 should be used with unicast key, but + * allow this for client mode for now. */ + idx = key->keyidx; + } else + return -EIO; + } else { + if (WARN_ON(!sta)) + return -EOPNOTSUPP; + mac = sta->addr; + + if (key->alg == ALG_TKIP) + idx = ath_reserve_key_cache_slot_tkip(common); + else + idx = ath_reserve_key_cache_slot(common); + if (idx < 0) + return -ENOSPC; /* no free key cache entries */ + } + + if (key->alg == ALG_TKIP) + ret = ath_setkey_tkip(common, idx, key->key, &hk, mac, + vif->type == NL80211_IFTYPE_AP); + else + ret = ath9k_hw_set_keycache_entry(ah, idx, &hk, mac); + + if (!ret) + return -EIO; + + set_bit(idx, common->keymap); + if (key->alg == ALG_TKIP) { + set_bit(idx + 64, common->keymap); + if (common->splitmic) { + set_bit(idx + 32, common->keymap); + set_bit(idx + 64 + 32, common->keymap); + } + } + + return idx; +} +EXPORT_SYMBOL(ath9k_cmn_key_config); + +/* + * Delete Key. + */ +void ath9k_cmn_key_delete(struct ath_common *common, + struct ieee80211_key_conf *key) +{ + struct ath_hw *ah = common->ah; + + ath9k_hw_keyreset(ah, key->hw_key_idx); + if (key->hw_key_idx < IEEE80211_WEP_NKID) + return; + + clear_bit(key->hw_key_idx, common->keymap); + if (key->alg != ALG_TKIP) + return; + + clear_bit(key->hw_key_idx + 64, common->keymap); + if (common->splitmic) { + ath9k_hw_keyreset(ah, key->hw_key_idx + 32); + clear_bit(key->hw_key_idx + 32, common->keymap); + clear_bit(key->hw_key_idx + 64 + 32, common->keymap); + } +} +EXPORT_SYMBOL(ath9k_cmn_key_delete); + static int __init ath9k_cmn_init(void) { return 0; diff --git a/drivers/net/wireless/ath/ath9k/common.h b/drivers/net/wireless/ath/ath9k/common.h index 042999c2fe9..bbcc57f6eba 100644 --- a/drivers/net/wireless/ath/ath9k/common.h +++ b/drivers/net/wireless/ath/ath9k/common.h @@ -23,6 +23,8 @@ /* Common header for Atheros 802.11n base driver cores */ +#define IEEE80211_WEP_NKID 4 + #define WME_NUM_TID 16 #define WME_BA_BMP_SIZE 64 #define WME_MAX_BA WME_BA_BMP_SIZE @@ -125,3 +127,18 @@ void ath9k_cmn_rx_skb_postprocess(struct ath_common *common, bool decrypt_error); int ath9k_cmn_padpos(__le16 frame_control); +int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb); +u32 ath9k_cmn_calcrxfilter(struct ieee80211_hw *hw, struct ath_hw *ah, + unsigned int rxfilter); +void ath9k_cmn_opmode_init(struct ieee80211_hw *hw, struct ath_hw *ah, + unsigned int rxfilter); +void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw, + struct ath9k_channel *ichan); +struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw, + struct ath_hw *ah); +int ath9k_cmn_key_config(struct ath_common *common, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key); +void ath9k_cmn_key_delete(struct ath_common *common, + struct ieee80211_key_conf *key); diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c new file mode 100644 index 00000000000..fc4f6e8c9ef --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -0,0 +1,993 @@ +/* + * Copyright (c) 2010 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "htc.h" + +#define ATH9K_FW_USB_DEV(devid, fw) \ + { USB_DEVICE(0x0cf3, devid), .driver_info = (unsigned long) fw } + +static struct usb_device_id ath9k_hif_usb_ids[] = { + ATH9K_FW_USB_DEV(0x9271, "ar9271.fw"), + { }, +}; + +MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); + +static int __hif_usb_tx(struct hif_device_usb *hif_dev); + +static void hif_usb_regout_cb(struct urb *urb) +{ + struct cmd_buf *cmd = (struct cmd_buf *)urb->context; + struct hif_device_usb *hif_dev = cmd->hif_dev; + + if (!hif_dev) { + usb_free_urb(urb); + if (cmd) { + if (cmd->skb) + dev_kfree_skb_any(cmd->skb); + kfree(cmd); + } + return; + } + + switch (urb->status) { + case 0: + break; + case -ENOENT: + case -ECONNRESET: + break; + case -ENODEV: + case -ESHUTDOWN: + return; + default: + break; + } + + if (cmd) { + ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, + cmd->skb, 1); + kfree(cmd); + usb_free_urb(urb); + } +} + +static int hif_usb_send_regout(struct hif_device_usb *hif_dev, + struct sk_buff *skb) +{ + struct urb *urb; + struct cmd_buf *cmd; + int ret = 0; + + urb = usb_alloc_urb(0, GFP_KERNEL); + if (urb == NULL) + return -ENOMEM; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) { + usb_free_urb(urb); + return -ENOMEM; + } + + cmd->skb = skb; + cmd->hif_dev = hif_dev; + + usb_fill_int_urb(urb, hif_dev->udev, + usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE), + skb->data, skb->len, + hif_usb_regout_cb, cmd, 1); + + ret = usb_submit_urb(urb, GFP_KERNEL); + if (ret) { + usb_free_urb(urb); + kfree(cmd); + } + + return ret; +} + +static void hif_usb_tx_cb(struct urb *urb) +{ + struct tx_buf *tx_buf = (struct tx_buf *) urb->context; + struct hif_device_usb *hif_dev = tx_buf->hif_dev; + struct sk_buff *skb; + bool drop, flush; + + if (!hif_dev) + return; + + switch (urb->status) { + case 0: + break; + case -ENOENT: + case -ECONNRESET: + break; + case -ENODEV: + case -ESHUTDOWN: + return; + default: + break; + } + + if (tx_buf) { + spin_lock(&hif_dev->tx.tx_lock); + drop = !!(hif_dev->tx.flags & HIF_USB_TX_STOP); + flush = !!(hif_dev->tx.flags & HIF_USB_TX_FLUSH); + spin_unlock(&hif_dev->tx.tx_lock); + + while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) { + if (!drop && !flush) { + ath9k_htc_txcompletion_cb(hif_dev->htc_handle, + skb, 1); + TX_STAT_INC(skb_completed); + } else { + dev_kfree_skb_any(skb); + } + } + + if (flush) + return; + + tx_buf->len = tx_buf->offset = 0; + __skb_queue_head_init(&tx_buf->skb_queue); + + spin_lock(&hif_dev->tx.tx_lock); + list_del(&tx_buf->list); + list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); + hif_dev->tx.tx_buf_cnt++; + if (!drop) + __hif_usb_tx(hif_dev); /* Check for pending SKBs */ + TX_STAT_INC(buf_completed); + spin_unlock(&hif_dev->tx.tx_lock); + } +} + +/* TX lock has to be taken */ +static int __hif_usb_tx(struct hif_device_usb *hif_dev) +{ + struct tx_buf *tx_buf = NULL; + struct sk_buff *nskb = NULL; + int ret = 0, i; + u16 *hdr, tx_skb_cnt = 0; + u8 *buf; + + if (hif_dev->tx.tx_skb_cnt == 0) + return 0; + + /* Check if a free TX buffer is available */ + if (list_empty(&hif_dev->tx.tx_buf)) + return 0; + + tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); + list_del(&tx_buf->list); + list_add_tail(&tx_buf->list, &hif_dev->tx.tx_pending); + hif_dev->tx.tx_buf_cnt--; + + tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); + + for (i = 0; i < tx_skb_cnt; i++) { + nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); + + /* Should never be NULL */ + BUG_ON(!nskb); + + hif_dev->tx.tx_skb_cnt--; + + buf = tx_buf->buf; + buf += tx_buf->offset; + hdr = (u16 *)buf; + *hdr++ = nskb->len; + *hdr++ = ATH_USB_TX_STREAM_MODE_TAG; + buf += 4; + memcpy(buf, nskb->data, nskb->len); + tx_buf->len = nskb->len + 4; + + if (i < (tx_skb_cnt - 1)) + tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; + + if (i == (tx_skb_cnt - 1)) + tx_buf->len += tx_buf->offset; + + __skb_queue_tail(&tx_buf->skb_queue, nskb); + TX_STAT_INC(skb_queued); + } + + usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, + usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), + tx_buf->buf, tx_buf->len, + hif_usb_tx_cb, tx_buf); + + ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); + if (ret) { + tx_buf->len = tx_buf->offset = 0; + __skb_queue_purge(&tx_buf->skb_queue); + __skb_queue_head_init(&tx_buf->skb_queue); + list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); + hif_dev->tx.tx_buf_cnt++; + } + + if (!ret) + TX_STAT_INC(buf_queued); + + return ret; +} + +static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb, + struct ath9k_htc_tx_ctl *tx_ctl) +{ + unsigned long flags; + + spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); + + if (hif_dev->tx.flags & HIF_USB_TX_STOP) { + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); + return -ENODEV; + } + + /* Check if the max queue count has been reached */ + if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); + return -ENOMEM; + } + + __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); + hif_dev->tx.tx_skb_cnt++; + + /* Send normal frames immediately */ + if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL))) + __hif_usb_tx(hif_dev); + + /* Check if AMPDUs have to be sent immediately */ + if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) && + (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && + (hif_dev->tx.tx_skb_cnt < 2)) { + __hif_usb_tx(hif_dev); + } + + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); + + return 0; +} + +static void hif_usb_start(void *hif_handle, u8 pipe_id) +{ + struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; + unsigned long flags; + + hif_dev->flags |= HIF_USB_START; + + spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); + hif_dev->tx.flags &= ~HIF_USB_TX_STOP; + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); +} + +static void hif_usb_stop(void *hif_handle, u8 pipe_id) +{ + struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; + unsigned long flags; + + spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); + __skb_queue_purge(&hif_dev->tx.tx_skb_queue); + hif_dev->tx.tx_skb_cnt = 0; + hif_dev->tx.flags |= HIF_USB_TX_STOP; + spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); +} + +static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb, + struct ath9k_htc_tx_ctl *tx_ctl) +{ + struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; + int ret = 0; + + switch (pipe_id) { + case USB_WLAN_TX_PIPE: + ret = hif_usb_send_tx(hif_dev, skb, tx_ctl); + break; + case USB_REG_OUT_PIPE: + ret = hif_usb_send_regout(hif_dev, skb); + break; + default: + ret = -EINVAL; + break; + } |