* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2009, 2010 Christian Lamparter <chunkeey@googlemail.com>
+ * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "printf.h"
#include "rf.h"
#include "linux/ieee80211.h"
+#include "rom.h"
static void wlan_txunstuck(unsigned int queue)
{
set_wlan_txq_dma_addr(queue, ((uint32_t) fw.wlan.tx_queue[queue].head) | 1);
- wlan_trigger(BIT(queue));
}
+#ifdef CONFIG_CARL9170FW_DMA_QUEUE_BUMP
static void wlan_txupdate(unsigned int queue)
{
set_wlan_txq_dma_addr(queue, ((uint32_t) fw.wlan.tx_queue[queue].head));
- wlan_trigger(BIT(queue));
}
+static void wlan_dma_bump(unsigned int qidx)
+{
+ unsigned int offset = qidx;
+ uint32_t status, trigger;
+
+ status = get(AR9170_MAC_REG_DMA_STATUS) >> 12;
+ trigger = get(AR9170_MAC_REG_DMA_TRIGGER) >> 12;
+
+ while (offset != 0) {
+ status >>= 4;
+ trigger >>= 4;
+ offset--;
+ }
+
+ status &= 0xf;
+ trigger &= 0xf;
+
+ if ((trigger == 0xa) && (status == 0x8)) {
+ DBG("UNSTUCK");
+ wlan_txunstuck(qidx);
+ } else {
+ DBG("UPDATE");
+ wlan_txupdate(qidx);
+ }
+}
+#endif /* CONFIG_CARL9170FW_DMA_QUEUE_BUMP */
+
#ifdef CONFIG_CARL9170FW_DEBUG
static void wlan_dump_queue(unsigned int qidx)
{
}
/* generate _aggregated_ tx_status for the host */
-static void wlan_tx_complete(struct carl9170_tx_superframe *super,
- bool txs)
+void wlan_tx_complete(struct carl9170_tx_superframe *super,
+ bool txs)
{
struct carl9170_tx_status *status;
*/
status->cookie = super->s.cookie;
status->queue = super->s.queue;
+ super->s.cookie = 0;
/*
* This field holds the number of tries of the rate in
return true;
}
+static inline u16 get_tid(struct ieee80211_hdr *hdr)
+{
+ return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
+}
+
+/* This function will only work on uint32_t-aligned pointers! */
+static inline bool compare_ether_address(const void *_d0, const void *_d1)
+{
+ const uint32_t *d0 = _d0;
+ const uint32_t *d1 = _d1;
+
+ /* BUG_ON((unsigned long)d0 & 3 || (unsigned long)d1 & 3)) */
+ return !((d0[0] ^ d1[0]) | (unsigned short)(d0[1] ^ d1[1]));
+}
+
+/* This function will only work on uint32_t-aligned pointers! */
+static bool same_hdr(const void *_d0, const void *_d1)
+{
+ const uint32_t *d0 = _d0;
+ const uint32_t *d1 = _d1;
+
+ /* BUG_ON((unsigned long)d0 & 3 || (unsigned long)d1 & 3)) */
+ return !((d0[0] ^ d1[0]) | /* FC + DU */
+ (d0[1] ^ d1[1]) | /* addr1 */
+ (d0[2] ^ d1[2]) | (d0[3] ^ d1[3]) | /* addr2 + addr3 */
+ (d0[4] ^ d1[4])); /* addr3 */
+}
+
+static inline bool same_aggr(struct ieee80211_hdr *a, struct ieee80211_hdr *b)
+{
+ return (get_tid(a) == get_tid(b)) || same_hdr(a, b);
+}
+
+static void wlan_tx_ampdu_end(unsigned int qidx)
+{
+ struct carl9170_tx_superframe *ht_prev = fw.wlan.ampdu_prev[qidx];
+
+ fw.wlan.ampdu_prev[qidx] = NULL;
+ if (ht_prev)
+ ht_prev->f.hdr.mac.ba_end = 1;
+}
+
+static void wlan_tx_ampdu(struct carl9170_tx_superframe *super)
+{
+ unsigned int qidx = super->s.queue;
+ struct carl9170_tx_superframe *ht_prev = fw.wlan.ampdu_prev[qidx];
+
+ if (!super->f.hdr.mac.ampdu) {
+ wlan_tx_ampdu_end(qidx);
+ } else {
+ fw.wlan.ampdu_prev[qidx] = super;
+
+ if (ht_prev &&
+ !same_aggr(&super->f.data.i3e, &ht_prev->f.data.i3e))
+ ht_prev->f.hdr.mac.ba_end = 1;
+ else
+ super->f.hdr.mac.ba_end = 0;
+ }
+}
+
/* for all tries */
static void __wlan_tx(struct dma_desc *desc)
{
struct carl9170_tx_superframe *super = get_super(desc);
-#ifdef CONFIG_CARL9170FW_NORMAL_TX_RX
- unsigned int queue = super->s.queue;
-#endif /* CONFIG_CARL9170FW_LOOPBACK */
if (unlikely(super->s.fill_in_tsf)) {
struct ieee80211_mgmt *mgmt = (void *) &super->f.data.i3e;
read_tsf(tsf);
}
+ wlan_tx_ampdu(super);
+
#if (defined CONFIG_CARL9170FW_LOOPBACK) || (defined CONFIG_CARL9170FW_DISCARD)
wlan_tx_complete(super, true);
unhide_super(desc);
# endif
#else /* CONFIG_CARL9170FW_LOOPBACK */
-# if ((defined CONFIG_CARL9170FW_DEBUG) && (defined CONFIG_CARL9170FW_PSM))
+# ifdef CONFIG_CARL9170FW_DEBUG
BUG_ON(fw.phy.psm.state != CARL9170_PSM_WAKE);
-# endif /* CONFIG_CARL9170FW_DEBUG && CONFIG_CARL9170FW_PSM */
+# endif /* CONFIG_CARL9170FW_DEBUG */
/* insert desc into the right queue */
- dma_put(&fw.wlan.tx_queue[queue], desc);
- wlan_trigger(BIT(queue));
+ dma_put(&fw.wlan.tx_queue[super->s.queue], desc);
#endif /* CONFIG_CARL9170FW_LOOPBACK */
}
+static void wlan_assign_seq(struct ieee80211_hdr *hdr, unsigned int vif)
+{
+ hdr->seq_ctrl &= cpu_to_le16(~IEEE80211_SCTL_SEQ);
+ hdr->seq_ctrl |= cpu_to_le16(fw.wlan.sequence[vif]);
+
+ if (!(hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)))
+ fw.wlan.sequence[vif] += 0x10;
+}
+
/* prepares frame for the first transmission */
static void _wlan_tx(struct dma_desc *desc)
{
struct carl9170_tx_superframe *super = get_super(desc);
+ if (unlikely(super->s.assign_seq)) {
+ wlan_assign_seq(&super->f.data.i3e, super->s.vif_id);
+ }
+
if (unlikely(super->s.ampdu_commit_density)) {
set(AR9170_MAC_REG_AMPDU_DENSITY,
MOD_VAL(AR9170_MAC_AMPDU_DENSITY,
static bool wlan_tx_status(struct dma_queue *queue,
struct dma_desc *desc)
{
- struct ar9170_tx_frame *frame = DESC_PAYLOAD(desc);
struct carl9170_tx_superframe *super = get_super(desc);
- struct ieee80211_hdr *hdr = &super->f.data.i3e;
unsigned int qidx = super->s.queue;
bool txfail, success;
success = true;
+ /* update hangcheck */
+ fw.wlan.last_super_num[qidx] = 0;
+
if (!!(desc->ctrl & AR9170_CTRL_FAIL)) {
txfail = !!(desc->ctrl & AR9170_CTRL_TXFAIL);
* order.
*/
- if (!frame->hdr.mac.ampdu) {
+ if (!super->f.hdr.mac.ampdu) {
/*
* 802.11 - 7.1.3.1.5.
* set "Retry Field" for consecutive attempts
* Note: For AMPDU see:
* 802.11n 9.9.1.6 "Retransmit Procedures"
*/
-
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY);
+ super->f.data.i3e.frame_control |=
+ cpu_to_le16(IEEE80211_FCTL_RETRY);
}
if (txfail) {
*/
dma_unlink_head(queue);
-#ifdef CONFIG_CARL9170FW_DELAYED_TX
dma_put(&fw.wlan.tx_retry, desc);
-#else
- __wlan_tx(desc);
-#endif /* CONFIG_CARL9170FW_DELAYED_TX */
return true;
}
} else {
unhide_super(desc);
- /* update hangcheck */
- fw.wlan.last_tx_desc_num[qidx] = 0;
-
#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
if (unlikely(super == (void *) &dma_mem.reserved.ba)) {
fw.wlan.ba_desc = desc;
static void handle_tx_completion(void)
{
struct dma_desc *desc;
- unsigned int i;
+ int i;
- for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) {
+ for (i = AR9170_TXQ_SPECIAL; i >= AR9170_TXQ0; i--) {
__while_desc_bits(desc, &fw.wlan.tx_queue[i], AR9170_OWN_BITS_SW) {
if (!wlan_tx_status(&fw.wlan.tx_queue[i], desc)) {
/* termination requested. */
}
}
-#ifdef CONFIG_CARL9170FW_DELAYED_TX
for_each_desc(desc, &fw.wlan.tx_retry)
__wlan_tx(desc);
- for_each_desc(desc, &fw.wlan.tx_delay[i])
- _wlan_tx(desc);
-#endif /* CONFIG_CARL9170FW_DELAYED_TX */
+ wlan_tx_ampdu_end(i);
+ if (!queue_empty(&fw.wlan.tx_queue[i]))
+ wlan_trigger(BIT(i));
+
}
}
super->s.cnt = 1;
hide_super(desc);
-#ifdef CONFIG_CARL9170FW_DELAYED_TX
- if (!queue_empty(&fw.wlan.tx_queue[super->s.queue])) {
- dma_put(&fw.wlan.tx_delay[super->s.queue], desc);
- return;
- }
-#endif /* CONFIG_CARL9170FW_DELAYED_TX */
-
#ifdef CONFIG_CARL9170FW_CAB_QUEUE
if (unlikely(super->s.cab)) {
fw.wlan.cab_queue_len[super->s.vif_id]++;
#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
_wlan_tx(desc);
+ wlan_trigger(BIT(super->s.queue));
}
#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
return tmp;
}
-static void handle_bar(struct dma_desc *desc)
+static void handle_bar(struct dma_desc *desc, struct ieee80211_hdr *hdr,
+ unsigned int len, unsigned int mac_err)
{
- struct ieee80211_hdr *hdr;
struct ieee80211_bar *bar;
struct carl9170_bar_ctx *ctx;
- hdr = ar9170_get_rx_i3e(desc);
-
- /* check if this is a BAR for us */
- if (likely(!ieee80211_is_back_req(hdr->frame_control)))
- return ;
-
- if (unlikely(ar9170_get_rx_macstatus_error(desc))) {
+ if (unlikely(mac_err)) {
/*
* This check does a number of things:
* 1. checks if the frame is in good nick
return ;
}
- if (unlikely(ar9170_get_rx_mpdu_len(desc) <
- sizeof(struct ieee80211_bar))) {
+ if (unlikely(len < (sizeof(struct ieee80211_bar) + FCS_LEN))) {
/*
* Sneaky, corrupted BARs... but not with us!
*/
fw.wlan.rx_overruns += overruns = get(AR9170_MAC_REG_RX_OVERRUN);
if (unlikely(overruns)) {
if (overruns == total) {
- /*
- * Theoretically, it should be enough to
- * trigger the WLAN RX DMA bit. But the
- * original firmware wanted a reset...
- */
DBG("RX Overrun");
fw.wlan.mac_reset++;
}
+
+ wlan_trigger(AR9170_DMA_TRIGGER_RXQ);
}
}
-static void handle_rx(void)
+#ifdef CONFIG_CARL9170FW_WOL
+
+#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
+static bool wlan_rx_wol_magic_packet(struct ieee80211_hdr *hdr, unsigned int len)
{
- struct dma_desc *desc;
+ const unsigned char *data, *end, *mac;
+ unsigned int found = 0;
- for_each_desc_not_bits(desc, &fw.wlan.rx_queue, AR9170_OWN_BITS_HW) {
- if (unlikely(desc->totalLen < 26 ||
- desc->totalLen > CONFIG_CARL9170FW_RX_FRAME_LEN)) {
- /*
- * This frame is too damaged to do anything
- * useful with it.
- */
- dma_reclaim(&fw.wlan.rx_queue, desc);
- _wlan_trigger(AR9170_DMA_TRIGGER_RXQ);
- } else {
+ /*
+ * LIMITATION:
+ * We can only scan the first AR9170_BLOCK_SIZE [=~320] bytes
+ * for MAGIC patterns!
+ */
+
+ /*
+ * TODO:
+ * Currently, the MAGIC MAC Address is fixed to the EEPROM default.
+ * It's possible to make it fully configurable, e.g:
+ *
+ * mac = (const unsigned char *) AR9170_MAC_REG_MAC_ADDR_L;
+ * But this will clash with the driver's suspend path, because it
+ * needs to reset the registers.
+ */
+ mac = rom.sys.mac_address;
+
+ data = (u8 *)((unsigned long)hdr + ieee80211_hdrlen(hdr->frame_control));
+ end = (u8 *)((unsigned long)hdr + len);
+
+ /*
+ * scan for standard WOL Magic frame
+ *
+ * "A physical WakeOnLAN (Magic Packet) will look like this:
+ * ---------------------------------------------------------------
+ * | Synchronization Stream | Target MAC | Password (optional) |
+ * | 6 octets | 96 octets | 0, 4 or 6 |
+ * ---------------------------------------------------------------
+ *
+ * The Synchronization Stream is defined as 6 bytes of FFh.
+ * The Target MAC block contains 16 duplications of the IEEEaddress
+ * of the target, with no breaks or interruptions.
+ *
+ * The Password field is optional, but if present, contains either
+ * 4 bytes or 6 bytes. The WakeOnLAN dissector was implemented to
+ * dissect the password, if present, according to the command-line
+ * format that ether-wake uses, therefore, if a 4-byte password is
+ * present, it will be dissected as an IPv4 address and if a 6-byte
+ * password is present, it will be dissected as an Ethernet address.
+ *
+ * <http://wiki.wireshark.org/WakeOnLAN>
+ */
+
+ while (data < end) {
+ if (found >= 6) {
+ if (*data == mac[found % 6])
+ found++;
+ else
+ found = 0;
+ }
+
+ /* previous check might reset found counter */
+ if (found < 6) {
+ if (*data == 0xff)
+ found++;
+ else
+ found = 0;
+ }
+
+ if (found == (6 + 16 * 6)) {
+ return true;
+ }
+
+ data++;
+ }
+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+
+/*
+ * Note: CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID is not a real
+ * string. We have to be careful not to add a \0 at the end.
+ */
+static const struct {
+ u8 ssid_ie;
+ u8 ssid_len;
+ u8 ssid[sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1];
+} __packed probe_req = {
+ .ssid_ie = WLAN_EID_SSID,
+ .ssid_len = sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1,
+ .ssid = CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID,
+};
+
+static bool wlan_rx_wol_probe_ssid(struct ieee80211_hdr *hdr, unsigned int len)
+{
+ const unsigned char *data, *end, *scan = (void *) &probe_req;
+
+ /*
+ * IEEE 802.11-2007 7.3.2.1 specifies that the SSID is no
+ * longer than 32 octets.
+ */
+ BUILD_BUG_ON((sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1) > 32);
+
+ if (ieee80211_is_probe_req(hdr->frame_control)) {
+ unsigned int i;
+ end = (u8 *)((unsigned long)hdr + len);
+
+ /*
+ * The position of the SSID information element inside
+ * a probe request frame is more or less "fixed".
+ */
+ data = (u8 *)((struct ieee80211_mgmt *)hdr)->u.probe_req.variable;
+ for (i = 0; i < (unsigned int)(probe_req.ssid_len + 1); i++) {
+ if (scan[i] != data[i])
+ return false;
+ }
+
+ return true;
+ }
+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+static void wlan_rx_wol(unsigned int rx_filter __unused, struct ieee80211_hdr *hdr __unused, unsigned int len __unused)
+{
+ bool __unused wake_up = false;
+
+#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
+ if (rx_filter & CARL9170_RX_FILTER_DATA)
+ wake_up |= wlan_rx_wol_magic_packet(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+ if (rx_filter & CARL9170_RX_FILTER_MGMT)
+ wake_up |= wlan_rx_wol_probe_ssid(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+ if (wake_up) {
+ fw.suspend_mode = CARL9170_AWAKE_HOST;
+ set(AR9170_USB_REG_WAKE_UP, AR9170_USB_WAKE_UP_WAKE);
+ }
+}
+#endif /* CONFIG_CARL9170FW_WOL */
+
+static unsigned int wlan_rx_filter(struct dma_desc *desc)
+{
+ struct ieee80211_hdr *hdr;
+ unsigned int data_len;
+ unsigned int rx_filter;
+ unsigned int mac_err;
+
+ data_len = ar9170_get_rx_mpdu_len(desc);
+ mac_err = ar9170_get_rx_macstatus_error(desc);
+
+#define AR9170_RX_ERROR_BAD (AR9170_RX_ERROR_FCS | AR9170_RX_ERROR_PLCP)
+
+ if (unlikely(data_len < (4 + 6 + FCS_LEN) ||
+ desc->totalLen > CONFIG_CARL9170FW_RX_FRAME_LEN) ||
+ mac_err & AR9170_RX_ERROR_BAD) {
+ /*
+ * This frame is too damaged to do anything
+ * useful with it.
+ */
+
+ return CARL9170_RX_FILTER_BAD;
+ }
+
+ rx_filter = 0;
+ if (mac_err & AR9170_RX_ERROR_WRONG_RA)
+ rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
+
+ if (mac_err & AR9170_RX_ERROR_DECRYPT)
+ rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
+
+ hdr = ar9170_get_rx_i3e(desc);
+ if (likely(ieee80211_is_data(hdr->frame_control))) {
+ rx_filter |= CARL9170_RX_FILTER_DATA;
+ } else if (ieee80211_is_ctl(hdr->frame_control)) {
+ switch (le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE) {
+ case IEEE80211_STYPE_BACK_REQ:
#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
- handle_bar(desc);
+ handle_bar(desc, hdr, data_len, mac_err);
#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */
+ /* fallthrough */
+ rx_filter |= CARL9170_RX_FILTER_CTL_BACKR;
+ break;
+ case IEEE80211_STYPE_PSPOLL:
+ rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
+ break;
+ default:
+ rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
+ break;
+ }
+ } else {
+ /* ieee80211_is_mgmt */
+ rx_filter |= CARL9170_RX_FILTER_MGMT;
+ }
+#ifdef CONFIG_CARL9170FW_WOL
+ if (unlikely(fw.suspend_mode == CARL9170_HOST_SUSPENDED)) {
+ wlan_rx_wol(rx_filter, hdr, min(data_len,
+ (unsigned int)AR9170_BLOCK_SIZE));
+ }
+#endif /* CONFIG_CARL9170FW_WOL */
+
+#undef AR9170_RX_ERROR_BAD
+
+ return rx_filter;
+}
+
+static void handle_rx(void)
+{
+ struct dma_desc *desc;
+
+ for_each_desc_not_bits(desc, &fw.wlan.rx_queue, AR9170_OWN_BITS_HW) {
+ if (!(wlan_rx_filter(desc) & fw.wlan.rx_filter)) {
dma_put(&fw.pta.up_queue, desc);
up_trigger();
+ } else {
+ dma_reclaim(&fw.wlan.rx_queue, desc);
+ wlan_trigger(AR9170_DMA_TRIGGER_RXQ);
}
}
}
/* ready to roll! */
_wlan_tx(desc);
+ wlan_trigger(BIT(super->s.queue));
}
}
-static uint8_t *beacon_find_ie(uint8_t ie)
+static uint8_t *beacon_find_ie(uint8_t ie, void *addr,
+ const unsigned int len)
{
- struct ieee80211_mgmt *mgmt = getp(AR9170_MAC_REG_BCN_ADDR);
+ struct ieee80211_mgmt *mgmt = addr;
uint8_t *pos, *end;
- unsigned int len;
-
- len = get(AR9170_MAC_REG_BCN_LENGTH);
-
- if (len < FCS_LEN + sizeof(mgmt))
- return NULL;
pos = mgmt->u.beacon.variable;
end = (uint8_t *) ((unsigned long)mgmt + (len - FCS_LEN));
return NULL;
}
-void wlan_cab_modify_dtim_beacon(const unsigned int vif)
+void wlan_modify_beacon(const unsigned int vif,
+ const unsigned int addr, const unsigned int len)
{
uint8_t *_ie;
struct ieee80211_tim_ie *ie;
- _ie = beacon_find_ie(WLAN_EID_TIM);
+ _ie = beacon_find_ie(WLAN_EID_TIM, (void *)addr, len);
if (likely(_ie)) {
ie = (struct ieee80211_tim_ie *) &_ie[2];
- fw.wlan.cab_flush_vif = vif;
if (!queue_empty(&fw.wlan.cab_queue[vif]) && (ie->dtim_count == 0)) {
/* schedule DTIM transfer */
- fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_ARMED;
- } else if ((fw.wlan.cab_queue_len[vif] == 0) && (fw.wlan.cab_flush_trigger)) {
+ fw.wlan.cab_flush_trigger[vif] = CARL9170_CAB_TRIGGER_ARMED;
+ } else if ((fw.wlan.cab_queue_len[vif] == 0) && (fw.wlan.cab_flush_trigger[vif])) {
/* undo all chances to the beacon structure */
ie->bitmap_ctrl &= ~0x1;
- fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_EMPTY;
+ fw.wlan.cab_flush_trigger[vif] = CARL9170_CAB_TRIGGER_EMPTY;
}
/* Triggered by CARL9170_CAB_TRIGGER_ARMED || CARL9170_CAB_TRIGGER_DEFER */
- if (fw.wlan.cab_flush_trigger) {
+ if (fw.wlan.cab_flush_trigger[vif]) {
/* Set the almighty Multicast Traffic Indication Bit. */
ie->bitmap_ctrl |= 0x1;
}
}
+
+ /*
+ * Ideally, the sequence number should be assigned by the TX arbiter
+ * hardware. But AFAIK that's not possible, so we have to go for the
+ * next best thing and write it into the beacon fifo during the open
+ * beacon update window.
+ */
+
+ wlan_assign_seq((struct ieee80211_hdr *)addr, vif);
}
#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
fw.wlan.cab_flush_time = get_clock_counter();
#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
-#ifdef CONFIG_CARL9170FW_PSM
rf_psm();
send_cmd_to_host(4, CARL9170_RSP_PRETBTT, 0x00,
(uint8_t *) &fw.phy.psm.state);
-#else
- send_cmd_to_host(0, CARL9170_RSP_PRETBTT, 0x00, NULL);
-#endif /* CONFIG_CARL9170FW_PSM */
}
static void handle_atim(void)
static void wlan_janitor(void)
{
#ifdef CONFIG_CARL9170FW_CAB_QUEUE
- if (unlikely(fw.wlan.cab_flush_trigger == CARL9170_CAB_TRIGGER_ARMED)) {
- /*
- * This is hardcoded into carl9170usb driver.
- *
- * The driver must set the PRETBTT event to beacon_interval -
- * CARL9170_PRETBTT_KUS (usually 6) Kus.
- *
- * But still, we can only do so much about 802.11-2007 9.3.2.1 &
- * 11.2.1.6. Let's hope the current solution is adequate enough.
- */
-
- if (is_after_msecs(fw.wlan.cab_flush_time, (CARL9170_TBTT_DELTA))) {
- wlan_cab_flush_queue(fw.wlan.cab_flush_vif);
+ unsigned int i;
+ for (i = 0; i < CARL9170_INTF_NUM; i++) {
+ if (unlikely(fw.wlan.cab_flush_trigger[i] == CARL9170_CAB_TRIGGER_ARMED)) {
/*
- * This prevents the code from sending new BC/MC frames
- * which were queued after the previous buffered traffic
- * has been sent out... They will have to wait until the
- * next DTIM beacon comes along.
+ * This is hardcoded into carl9170usb driver.
+ *
+ * The driver must set the PRETBTT event to beacon_interval -
+ * CARL9170_PRETBTT_KUS (usually 6) Kus.
+ *
+ * But still, we can only do so much about 802.11-2007 9.3.2.1 &
+ * 11.2.1.6. Let's hope the current solution is adequate enough.
*/
- fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_DEFER;
+
+ if (is_after_msecs(fw.wlan.cab_flush_time, (CARL9170_TBTT_DELTA))) {
+ wlan_cab_flush_queue(i);
+
+ /*
+ * This prevents the code from sending new BC/MC frames
+ * which were queued after the previous buffered traffic
+ * has been sent out... They will have to wait until the
+ * next DTIM beacon comes along.
+ */
+ fw.wlan.cab_flush_trigger[i] = CARL9170_CAB_TRIGGER_DEFER;
+ }
}
- }
-#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
-#ifdef CONFIG_CARL9170FW_DELAYED_TX
- if (fw.wlan.tx_trigger) {
- _wlan_trigger(fw.wlan.tx_trigger);
- fw.wlan.tx_trigger = 0;
}
-#endif /* CONFIG_CARL9170FW_DELAYED_TX */
+#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
wlan_send_buffered_tx_status();
} \
} while (0)
+ intr |= fw.wlan.soft_int;
+ fw.wlan.soft_int = 0;
+
HANDLER(intr, AR9170_MAC_INT_PRETBTT, handle_pretbtt);
HANDLER(intr, AR9170_MAC_INT_ATIM, handle_atim);
#undef HANDLER
}
-static void wlan_dma_bump(unsigned int qidx)
-{
- unsigned int offset = qidx;
- uint32_t status, trigger;
-
- status = get(AR9170_MAC_REG_DMA_STATUS) >> 12;
- trigger = get(AR9170_MAC_REG_DMA_TRIGGER) >> 12;
-
- while (offset != 0) {
- status >>= 4;
- trigger >>= 4;
- offset--;
- }
-
- status &= 0xf;
- trigger &= 0xf;
-
- if ((trigger == 0xa) && (status == 0x8)) {
- DBG("UNSTUCK");
- wlan_txunstuck(qidx);
- } else {
- DBG("UPDATE");
- wlan_txupdate(qidx);
- }
-}
+enum {
+ CARL9170FW_TX_MAC_BUMP = 4,
+ CARL9170FW_TX_MAC_DEBUG = 6,
+ CARL9170FW_TX_MAC_RESET = 7,
+};
static void wlan_check_hang(void)
{
struct dma_desc *desc;
- unsigned int i;
+ int i;
- for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) {
+ for (i = AR9170_TXQ_SPECIAL; i >= AR9170_TXQ0; i--) {
if (queue_empty(&fw.wlan.tx_queue[i])) {
/* Nothing to do here... move along */
continue;
desc = get_wlan_txq_addr(i);
/* Stuck frame detection */
- if (unlikely(desc == fw.wlan.last_tx_desc[i])) {
- fw.wlan.last_tx_desc_num[i]++;
+ if (unlikely(DESC_PAYLOAD(desc) == fw.wlan.last_super[i])) {
+ fw.wlan.last_super_num[i]++;
- if (unlikely(fw.wlan.last_tx_desc_num[i] > 6)) {
+ if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_RESET)) {
/*
* schedule MAC reset (aka OFF/ON => dead)
*
}
#ifdef CONFIG_CARL9170FW_DEBUG
- if (unlikely(fw.wlan.last_tx_desc_num[i] > 5)) {
+ if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_DEBUG)) {
/*
* Sigh, the queue is almost certainly
* dead. Dump the queue content to the
}
#endif /* CONFIG_CARL9170FW_DEBUG */
- if (unlikely(fw.wlan.last_tx_desc_num[i] > 3)) {
+#ifdef CONFIG_CARL9170FW_DMA_QUEUE_BUMP
+ if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_BUMP)) {
/*
* Hrrm, bump the queue a bit.
* maybe this will get it going again.
*/
wlan_dma_bump(i);
+ wlan_trigger(BIT(i));
}
+#endif /* CONFIG_CARL9170FW_DMA_QUEUE_BUMP */
} else {
/* Nothing stuck */
- fw.wlan.last_tx_desc[i] = desc;
- fw.wlan.last_tx_desc_num[i] = 0;
+ fw.wlan.last_super[i] = DESC_PAYLOAD(desc);
+ fw.wlan.last_super_num[i] = 0;
}
}
}
+#ifdef CONFIG_CARL9170FW_FW_MAC_RESET
/*
* NB: Resetting the MAC is a two-edged sword.
* On most occasions, it does what it is supposed to do.
uint32_t cam_mode;
uint32_t ack_power;
uint32_t rts_cts_tpc;
- unsigned int i;
+ uint32_t rts_cts_rate;
+ int i;
#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
uint32_t rx_BB;
#endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
+#ifdef CONFIG_CARL9170FW_NOISY_MAC_RESET
INFO("MAC RESET");
+#endif /* CONFIG_CARL9170FW_NOISY_MAC_RESET */
/* Save aggregation parameters */
agg_wait_counter = get(AR9170_MAC_REG_AMPDU_FACTOR);
ack_power = get(AR9170_MAC_REG_ACK_TPC);
rts_cts_tpc = get(AR9170_MAC_REG_RTS_CTS_TPC);
+ rts_cts_rate = get(AR9170_MAC_REG_RTS_CTS_RATE);
#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
/* 0x1c8960 write only */
set(AR9170_MAC_REG_RTS_CTS_TPC, rts_cts_tpc);
set(AR9170_MAC_REG_ACK_TPC, ack_power);
+ set(AR9170_MAC_REG_RTS_CTS_RATE, rts_cts_rate);
#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
set(AR9170_PHY_REG_SWITCH_CHAIN_2, rx_BB);
* set(AR9170_PHY_REG_CCA_THRESHOLD, 0x0);
*/
- for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) {
- DBG("Q:%d l:%d h:%p t:%p\n", i, queue_len(&fw.wlan.tx_queue[i]),
- fw.wlan.tx_queue[i].head, fw.wlan.tx_queue[i].terminator);
+ val = AR9170_DMA_TRIGGER_RXQ;
+ /* Reinitialize all WLAN TX DMA queues. */
+ for (i = AR9170_TXQ_SPECIAL; i >= AR9170_TXQ0; i--) {
+ struct dma_desc *iter;
- set_wlan_txq_dma_addr(i, (uint32_t) fw.wlan.tx_queue[i].head);
+ __for_each_desc_bits(iter, &fw.wlan.tx_queue[i], AR9170_OWN_BITS_SW);
- if (!queue_empty(&fw.wlan.tx_queue[i]))
- wlan_trigger(BIT(i));
+ /* kill the stuck frame */
+ if (!is_terminator(&fw.wlan.tx_queue[i], iter) &&
+ fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_RESET &&
+ fw.wlan.last_super[i] == DESC_PAYLOAD(iter)) {
+ struct carl9170_tx_superframe *super = get_super(iter);
+
+ iter->status = AR9170_OWN_BITS_SW;
+ /*
+ * Mark the frame as failed.
+ * The BAFAIL flag allows the frame to sail through
+ * wlan_tx_status without much "unstuck" trouble.
+ */
+ iter->ctrl &= ~(AR9170_CTRL_FAIL);
+ iter->ctrl |= AR9170_CTRL_BAFAIL;
+
+ super->s.cnt = CARL9170_TX_MAX_RATE_TRIES;
+ super->s.rix = CARL9170_TX_MAX_RETRY_RATES;
+
+ fw.wlan.last_super_num[i] = 0;
+ fw.wlan.last_super[i] = NULL;
+ iter = iter->lastAddr->nextAddr;
+ }
+
+ set_wlan_txq_dma_addr(i, (uint32_t) iter);
+ if (!is_terminator(&fw.wlan.tx_queue[i], iter))
+ val |= BIT(i);
+
+ DBG("Q:%d l:%d h:%p t:%p cu:%p it:%p ct:%x st:%x\n", i, queue_len(&fw.wlan.tx_queue[i]),
+ fw.wlan.tx_queue[i].head, fw.wlan.tx_queue[i].terminator,
+ get_wlan_txq_addr(i), iter, iter->ctrl, iter->status);
}
- handle_rx();
+ fw.wlan.soft_int |= AR9170_MAC_INT_RXC | AR9170_MAC_INT_TXC |
+ AR9170_MAC_INT_RETRY_FAIL;
+
set(AR9170_MAC_REG_DMA_RXQ_ADDR, (uint32_t) fw.wlan.rx_queue.head);
- wlan_trigger(AR9170_DMA_TRIGGER_RXQ);
+ wlan_trigger(val);
+}
+#else
+static void wlan_mac_reset(void)
+{
+ /* The driver takes care of reinitializing the device */
+ BUG("MAC RESET");
}
+#endif /* CONFIG_CARL9170FW_FW_MAC_RESET */
void __cold wlan_timer(void)
{
projects / carl9170fw.git / blobdiff