* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
+ * Copyright 2009-2012 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);
-}
-
-#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));
-}
-
-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 */
+#include "wol.h"
#ifdef CONFIG_CARL9170FW_DEBUG
static void wlan_dump_queue(unsigned int qidx)
}
#endif /* CONFIG_CARL9170FW_DEBUG */
-static void wlan_send_buffered_tx_status(void)
-{
- unsigned int len;
-
- while (fw.wlan.tx_status_pending) {
- len = min((unsigned int)fw.wlan.tx_status_pending,
- CARL9170_RSP_TX_STATUS_NUM);
- len = min(len, CARL9170_TX_STATUS_NUM - fw.wlan.tx_status_head_idx);
-
- /*
- * rather than memcpy each individual request into a large buffer,
- * we _splice_ them all together.
- *
- * The only downside is however that we have to be careful around
- * the edges of the tx_status_cache.
- *
- * Note:
- * Each tx_status is about 2 bytes. However every command package
- * must have a size which is a multiple of 4.
- */
-
- send_cmd_to_host((len * sizeof(struct carl9170_tx_status) + 3) & ~3,
- CARL9170_RSP_TXCOMP, len, (void *)
- &fw.wlan.tx_status_cache[fw.wlan.tx_status_head_idx]);
-
- fw.wlan.tx_status_pending -= len;
- fw.wlan.tx_status_head_idx += len;
- fw.wlan.tx_status_head_idx %= CARL9170_TX_STATUS_NUM;
- }
-}
-
-static struct carl9170_tx_status *wlan_get_tx_status_buffer(void)
-{
- struct carl9170_tx_status *tmp;
-
- tmp = &fw.wlan.tx_status_cache[fw.wlan.tx_status_tail_idx++];
- fw.wlan.tx_status_tail_idx %= CARL9170_TX_STATUS_NUM;
-
- if (fw.wlan.tx_status_pending == CARL9170_TX_STATUS_NUM)
- wlan_send_buffered_tx_status();
-
- fw.wlan.tx_status_pending++;
-
- return tmp;
-}
-
-/* generate _aggregated_ tx_status for the host */
-void wlan_tx_complete(struct carl9170_tx_superframe *super,
- bool txs)
-{
- struct carl9170_tx_status *status;
-
- status = wlan_get_tx_status_buffer();
-
- /*
- * The *unique* cookie and AC_ID is used by the driver for
- * frame lookup.
- */
- 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
- * the rate index field (rix).
- */
- status->rix = super->s.rix;
- status->tries = super->s.cnt;
- status->success = (txs) ? 1 : 0;
-}
-
-static bool wlan_tx_consume_retry(struct carl9170_tx_superframe *super)
-{
- /* check if this was the last possible retry with this rate */
- if (unlikely(super->s.cnt >= super->s.ri[super->s.rix].tries)) {
- /* end of the road - indicate tx failure */
- if (unlikely(super->s.rix == CARL9170_TX_MAX_RETRY_RATES))
- return false;
-
- /* check if there are alternative rates available */
- if (!super->s.rr[super->s.rix].set)
- return false;
-
- /* try next retry rate */
- super->f.hdr.phy.set = super->s.rr[super->s.rix].set;
-
- /* finally - mark the old rate as USED */
- super->s.rix++;
-
- /* update MAC flags */
- super->f.hdr.mac.erp_prot = super->s.ri[super->s.rix].erp_prot;
- super->f.hdr.mac.ampdu = super->s.ri[super->s.rix].ampdu;
-
- /* reinitialize try counter */
- super->s.cnt = 1;
- } else {
- /* just increase retry counter */
- super->s.cnt++;
- }
-
- 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);
-
- if (unlikely(super->s.fill_in_tsf)) {
- struct ieee80211_mgmt *mgmt = (void *) &super->f.data.i3e;
- uint32_t *tsf = (uint32_t *) &mgmt->u.probe_resp.timestamp;
-
- /*
- * Truth be told: this is a hack.
- *
- * The *real* TSF is definitely going to be higher/older.
- * But this hardware emulation code is head and shoulders
- * above anything a driver can possibly do.
- *
- * (even, if it's got an accurate atomic clock source).
- */
-
- read_tsf(tsf);
- }
-
- wlan_tx_ampdu(super);
-
-#if (defined CONFIG_CARL9170FW_LOOPBACK) || (defined CONFIG_CARL9170FW_DISCARD)
- wlan_tx_complete(super, true);
- unhide_super(desc);
-# ifdef CONFIG_CARL9170FW_LOOPBACK
- dma_put(&fw.pta.up_queue, desc);
- up_trigger();
-# elif CONFIG_CARL9170FW_DISCARD
- dma_reclaim(&fw.pta.down_queue, desc);
- down_trigger();
-# endif
-#else /* CONFIG_CARL9170FW_LOOPBACK */
-
-# ifdef CONFIG_CARL9170FW_DEBUG
- BUG_ON(fw.phy.psm.state != CARL9170_PSM_WAKE);
-# endif /* CONFIG_CARL9170FW_DEBUG */
-
- /* insert desc into the right 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,
- get(AR9170_MAC_REG_AMPDU_DENSITY),
- super->s.ampdu_density));
- }
-
- if (unlikely(super->s.ampdu_commit_factor)) {
- set(AR9170_MAC_REG_AMPDU_FACTOR,
- MOD_VAL(AR9170_MAC_AMPDU_FACTOR,
- get(AR9170_MAC_REG_AMPDU_FACTOR),
- 8 << super->s.ampdu_factor));
- }
-
- __wlan_tx(desc);
-}
-
-/* propagate transmission status back to the driver */
-static bool wlan_tx_status(struct dma_queue *queue,
- struct dma_desc *desc)
-{
- struct carl9170_tx_superframe *super = get_super(desc);
- 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);
-
- /* reset retry indicator flags */
- desc->ctrl &= ~(AR9170_CTRL_TXFAIL | AR9170_CTRL_BAFAIL);
-
- if (wlan_tx_consume_retry(super)) {
- /*
- * retry for simple and aggregated 802.11 frames.
- *
- * Note: We must not mess up the original frame
- * order.
- */
-
- 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"
- */
- super->f.data.i3e.frame_control |=
- cpu_to_le16(IEEE80211_FCTL_RETRY);
- }
-
- if (txfail) {
- /* Normal TX Failure */
-
- /* demise descriptor ownership back to the hardware */
- dma_rearm(desc);
-
- /*
- * And this will get the queue going again.
- * To understand why: you have to get the HW
- * specs... But sadly I never saw them.
- */
- wlan_txunstuck(qidx);
-
- /* abort cycle - this is necessary due to HW design */
- return false;
- } else {
- /* (HT-) BlockACK failure */
-
- /*
- * Unlink the failed attempt and put it into
- * the retry queue. The caller routine must
- * be aware of this so the frames don't get lost.
- */
-
- dma_unlink_head(queue);
- dma_put(&fw.wlan.tx_retry, desc);
- return true;
- }
- } else {
- /* out of frame attempts - discard frame */
- success = false;
- }
- }
-
- dma_unlink_head(queue);
- if (txfail) {
- /*
- * Issue the queue bump,
- * We need to do this in case this was the frame's last
- * possible retry attempt and it unfortunately: it failed.
- */
-
- wlan_txunstuck(qidx);
- }
-
- unhide_super(desc);
-
-#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
- if (unlikely(super == (void *) &dma_mem.reserved.ba)) {
- fw.wlan.ba_desc = desc;
- fw.wlan.ba_desc_available = 1;
- return true;
- }
-#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */
-
- wlan_tx_complete(super, success);
-
-#ifdef CONFIG_CARL9170FW_CAB_QUEUE
- if (unlikely(super->s.cab))
- fw.wlan.cab_queue_len[super->s.vif_id]--;
-#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
-
- /* recycle freed descriptors */
- dma_reclaim(&fw.pta.down_queue, desc);
- down_trigger();
- return true;
-}
-
-static void handle_tx_completion(void)
-{
- struct dma_desc *desc;
- int 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. */
- break;
- }
- }
-
- for_each_desc(desc, &fw.wlan.tx_retry)
- __wlan_tx(desc);
-
- wlan_tx_ampdu_end(i);
- if (!queue_empty(&fw.wlan.tx_queue[i]))
- wlan_trigger(BIT(i));
-
- }
-}
-
-void __hot wlan_tx(struct dma_desc *desc)
-{
- struct carl9170_tx_superframe *super = DESC_PAYLOAD(desc);
-
- /* initialize rate control struct */
- super->s.rix = 0;
- super->s.cnt = 1;
- hide_super(desc);
-
-#ifdef CONFIG_CARL9170FW_CAB_QUEUE
- if (unlikely(super->s.cab)) {
- fw.wlan.cab_queue_len[super->s.vif_id]++;
- dma_put(&fw.wlan.cab_queue[super->s.vif_id], desc);
- return;
- }
-#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
-
- _wlan_tx(desc);
- wlan_trigger(BIT(super->s.queue));
-}
-
-#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
-static void wlan_send_buffered_ba(void)
-{
- struct carl9170_tx_ba_superframe *baf = &dma_mem.reserved.ba.ba;
- struct ieee80211_ba *ba = (struct ieee80211_ba *) &baf->f.ba;
- struct carl9170_bar_ctx *ctx;
-
- if (likely(fw.wlan.ba_head_idx == fw.wlan.ba_tail_idx))
- return;
-
- /* there's no point to continue when the ba_desc is not available. */
- if (!fw.wlan.ba_desc_available)
- return;
-
- ctx = &fw.wlan.ba_cache[fw.wlan.ba_head_idx];
- fw.wlan.ba_head_idx++;
- fw.wlan.ba_head_idx %= CONFIG_CARL9170FW_BACK_REQS_NUM;
-
- /* Format BlockAck */
- fw.wlan.ba_desc->status = 0;
- fw.wlan.ba_desc->ctrl = AR9170_CTRL_FS_BIT | AR9170_CTRL_LS_BIT;
- fw.wlan.ba_desc_available = 0;
- fw.wlan.ba_desc->nextAddr = fw.wlan.ba_desc->lastAddr =
- fw.wlan.ba_desc;
-
- baf->s.len = fw.wlan.ba_desc->totalLen = fw.wlan.ba_desc->dataSize =
- sizeof(struct carl9170_tx_superdesc) +
- sizeof(struct ar9170_tx_hwdesc) +
- sizeof(struct ieee80211_ba);
-
- baf->s.ri[0].tries = 1;
- baf->s.queue = AR9170_TXQ_VO;
- baf->f.hdr.length = sizeof(struct ieee80211_ba) + FCS_LEN;
-
- /* HW Duration / Backoff */
- baf->f.hdr.mac.backoff = 1;
- baf->f.hdr.mac.hw_duration = 1;
-
- /* take the TX rate from the RX'd BAR */
- baf->f.hdr.phy.set = ctx->phy;
- baf->f.hdr.phy.tx_power = 29; /* 14.5 dBm */
-
- /* format outgoing BA */
- ba->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
- ba->duration = cpu_to_le16(0);
- memcpy(ba->ta, ctx->ta, 6);
- memcpy(ba->ra, ctx->ra, 6);
-
- /*
- * Unfortunately, we cannot look into the hardware's scoreboard.
- * Therefore we have to proceed as described in 802.11n 9.10.7.5
- * and send a null BlockAck.
- */
- memset(ba->bitmap, 0x0, sizeof(ba->bitmap));
-
- /*
- * NB:
- * not entirely sure if this is 100% correct?!
- */
- ba->control = ctx->control | cpu_to_le16(1);
- ba->start_seq_num = ctx->start_seq_num;
-
- wlan_tx(fw.wlan.ba_desc);
-}
-
-static struct carl9170_bar_ctx *wlan_get_bar_cache_buffer(void)
-{
- struct carl9170_bar_ctx *tmp;
-
- tmp = &fw.wlan.ba_cache[fw.wlan.ba_tail_idx];
- fw.wlan.ba_tail_idx++;
- fw.wlan.ba_tail_idx %= CONFIG_CARL9170FW_BACK_REQS_NUM;
-
- return tmp;
-}
-
-static void handle_bar(struct dma_desc *desc, struct ieee80211_hdr *hdr,
- unsigned int len, unsigned int mac_err)
-{
- struct ieee80211_bar *bar;
- struct carl9170_bar_ctx *ctx;
-
- if (unlikely(mac_err)) {
- /*
- * This check does a number of things:
- * 1. checks if the frame is in good nick
- * 2. checks if the RA (MAC) matches
- */
- return ;
- }
-
- if (unlikely(len < (sizeof(struct ieee80211_bar) + FCS_LEN))) {
- /*
- * Sneaky, corrupted BARs... but not with us!
- */
-
- return ;
- }
-
- bar = (void *) hdr;
-
- if ((bar->control & cpu_to_le16(IEEE80211_BAR_CTRL_MULTI_TID)) ||
- !(bar->control & cpu_to_le16(IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA))) {
- /* not implemented yet */
-
- return ;
- }
-
- ctx = wlan_get_bar_cache_buffer();
-
- /* Brilliant! The BAR provides all necessary MACs! */
- memcpy(ctx->ra, bar->ta, 6);
- memcpy(ctx->ta, bar->ra, 6);
-
- /*
- * NB:
- * not entirely sure if this is 100% correct to force the
- * imm ack bit or not...
- */
- ctx->control = bar->control | cpu_to_le16(1);
- ctx->start_seq_num = bar->start_seq_num;
- ctx->phy = ar9170_rx_to_phy(desc);
- if (unlikely(!ctx->phy)) {
- /* provide a backup, in case ar9170_rx_to_phy fails */
- ctx->phy = cpu_to_le32(0x2cc301);
- }
-}
-#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */
-
static void wlan_check_rx_overrun(void)
{
uint32_t overruns, total;
- fw.wlan.rx_total += total = get(AR9170_MAC_REG_RX_TOTAL);
- fw.wlan.rx_overruns += overruns = get(AR9170_MAC_REG_RX_OVERRUN);
+ fw.tally.rx_total += total = get(AR9170_MAC_REG_RX_TOTAL);
+ fw.tally.rx_overrun += overruns = get(AR9170_MAC_REG_RX_OVERRUN);
if (unlikely(overruns)) {
if (overruns == total) {
DBG("RX Overrun");
}
}
-#ifdef CONFIG_CARL9170FW_WOL
-
-#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
-static bool wlan_rx_wol_magic_packet(struct ieee80211_hdr *hdr, unsigned int len)
-{
- const unsigned char *data, *end, *mac;
- unsigned int found = 0;
-
- /*
- * 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, 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);
- }
- }
-}
-
-#ifdef CONFIG_CARL9170FW_CAB_QUEUE
-void wlan_cab_flush_queue(const unsigned int vif)
-{
- struct dma_queue *cab_queue = &fw.wlan.cab_queue[vif];
- struct dma_desc *desc;
-
- /* move queued frames into the main tx queues */
- for_each_desc(desc, cab_queue) {
- struct carl9170_tx_superframe *super = get_super(desc);
- if (!queue_empty(cab_queue)) {
- /*
- * Set MOREDATA flag for all,
- * but the last queued frame.
- * see: 802.11-2007 11.2.1.5 f)
- *
- * This is actually the reason to why
- * we need to prevent the reentry.
- */
-
- super->f.data.i3e.frame_control |=
- cpu_to_le16(IEEE80211_FCTL_MOREDATA);
- } else {
- super->f.data.i3e.frame_control &=
- cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
- }
-
- /* ready to roll! */
- _wlan_tx(desc);
- wlan_trigger(BIT(super->s.queue));
- }
-}
-
-static uint8_t *beacon_find_ie(uint8_t ie, void *addr,
- const unsigned int len)
-{
- struct ieee80211_mgmt *mgmt = addr;
- uint8_t *pos, *end;
-
- pos = mgmt->u.beacon.variable;
- end = (uint8_t *) ((unsigned long)mgmt + (len - FCS_LEN));
- while (pos < end) {
- if (pos + 2 + pos[1] > end)
- return NULL;
-
- if (pos[0] == ie)
- return pos;
-
- pos += pos[1] + 2;
- }
-
- return NULL;
-}
-
-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, (void *)addr, len);
- if (likely(_ie)) {
- ie = (struct ieee80211_tim_ie *) &_ie[2];
-
- if (!queue_empty(&fw.wlan.cab_queue[vif]) && (ie->dtim_count == 0)) {
- /* schedule DTIM transfer */
- 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[vif] = CARL9170_CAB_TRIGGER_EMPTY;
- }
-
- /* Triggered by CARL9170_CAB_TRIGGER_ARMED || CARL9170_CAB_TRIGGER_DEFER */
- 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 */
-
static void handle_beacon_config(void)
{
uint32_t bcn_count;
static void handle_pretbtt(void)
{
-#ifdef CONFIG_CARL9170FW_CAB_QUEUE
fw.wlan.cab_flush_time = get_clock_counter();
-#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
+#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
rf_psm();
send_cmd_to_host(4, CARL9170_RSP_PRETBTT, 0x00,
(uint8_t *) &fw.phy.psm.state);
+#endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
}
static void handle_atim(void)
static void wlan_janitor(void)
{
-#ifdef CONFIG_CARL9170FW_CAB_QUEUE
- unsigned int i;
-
- for (i = 0; i < CARL9170_INTF_NUM; i++) {
- if (unlikely(fw.wlan.cab_flush_trigger[i] == 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(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 */
+ wlan_send_buffered_cab();
wlan_send_buffered_tx_status();
-#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ
wlan_send_buffered_ba();
-#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */
+
+ wol_janitor();
}
void handle_wlan(void)
HANDLER(intr, AR9170_MAC_INT_ATIM, handle_atim);
- HANDLER(intr, AR9170_MAC_INT_RXC, handle_rx);
+ HANDLER(intr, AR9170_MAC_INT_RXC, handle_wlan_rx);
HANDLER(intr, (AR9170_MAC_INT_TXC | AR9170_MAC_INT_RETRY_FAIL),
- handle_tx_completion);
+ handle_wlan_tx_completion);
#ifdef CONFIG_CARL9170FW_DEBUG
HANDLER(intr, AR9170_MAC_INT_QOS, handle_qos);
}
/* fetch the current DMA queue position */
- desc = get_wlan_txq_addr(i);
+ desc = (struct dma_desc *)get_wlan_txq_addr(i);
/* Stuck frame detection */
if (unlikely(DESC_PAYLOAD(desc) == fw.wlan.last_super[i])) {
projects / carl9170fw.git / blobdiff