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Commit a1751b22 authored by Stanislaw Gruszka's avatar Stanislaw Gruszka
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iwlegacy: merge iwl-4965-{tx,rx}.c into 4965-mac.c 

Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
parent eb3cdfb7
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Showing with 1478 additions and 1588 deletions
drivers/net/wireless/iwlegacy/4965-mac.c
View file @ a1751b22
......@@ -86,6 +86,1483 @@ MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_ALIAS("iwl4965");
void il4965_rx_missed_beacon_notif(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
il->missed_beacon_threshold) {
D_CALIB(
"missed bcn cnsq %d totl %d rcd %d expctd %d\n",
le32_to_cpu(missed_beacon->consecutive_missed_beacons),
le32_to_cpu(missed_beacon->total_missed_becons),
le32_to_cpu(missed_beacon->num_recvd_beacons),
le32_to_cpu(missed_beacon->num_expected_beacons));
if (!test_bit(STATUS_SCANNING, &il->status))
il4965_init_sensitivity(il);
}
}
/* Calculate noise level, based on measurements during network silence just
* before arriving beacon. This measurement can be done only if we know
* exactly when to expect beacons, therefore only when we're associated. */
static void il4965_rx_calc_noise(struct il_priv *il)
{
struct stats_rx_non_phy *rx_info;
int num_active_rx = 0;
int total_silence = 0;
int bcn_silence_a, bcn_silence_b, bcn_silence_c;
int last_rx_noise;
rx_info = &(il->_4965.stats.rx.general);
bcn_silence_a =
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
bcn_silence_b =
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
bcn_silence_c =
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
if (bcn_silence_a) {
total_silence += bcn_silence_a;
num_active_rx++;
}
if (bcn_silence_b) {
total_silence += bcn_silence_b;
num_active_rx++;
}
if (bcn_silence_c) {
total_silence += bcn_silence_c;
num_active_rx++;
}
/* Average among active antennas */
if (num_active_rx)
last_rx_noise = (total_silence / num_active_rx) - 107;
else
last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
bcn_silence_a, bcn_silence_b, bcn_silence_c,
last_rx_noise);
}
#ifdef CONFIG_IWLEGACY_DEBUGFS
/*
* based on the assumption of all stats counter are in DWORD
* FIXME: This function is for debugging, do not deal with
* the case of counters roll-over.
*/
static void il4965_accumulative_stats(struct il_priv *il,
__le32 *stats)
{
int i, size;
__le32 *prev_stats;
u32 *accum_stats;
u32 *delta, *max_delta;
struct stats_general_common *general, *accum_general;
struct stats_tx *tx, *accum_tx;
prev_stats = (__le32 *)&il->_4965.stats;
accum_stats = (u32 *)&il->_4965.accum_stats;
size = sizeof(struct il_notif_stats);
general = &il->_4965.stats.general.common;
accum_general = &il->_4965.accum_stats.general.common;
tx = &il->_4965.stats.tx;
accum_tx = &il->_4965.accum_stats.tx;
delta = (u32 *)&il->_4965.delta_stats;
max_delta = (u32 *)&il->_4965.max_delta;
for (i = sizeof(__le32); i < size;
i += sizeof(__le32), stats++, prev_stats++, delta++,
max_delta++, accum_stats++) {
if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
*delta = (le32_to_cpu(*stats) -
le32_to_cpu(*prev_stats));
*accum_stats += *delta;
if (*delta > *max_delta)
*max_delta = *delta;
}
}
/* reset accumulative stats for "no-counter" type stats */
accum_general->temperature = general->temperature;
accum_general->ttl_timestamp = general->ttl_timestamp;
}
#endif
#define REG_RECALIB_PERIOD (60)
void il4965_rx_stats(struct il_priv *il,
struct il_rx_buf *rxb)
{
int change;
struct il_rx_pkt *pkt = rxb_addr(rxb);
D_RX(
"Statistics notification received (%d vs %d).\n",
(int)sizeof(struct il_notif_stats),
le32_to_cpu(pkt->len_n_flags) &
FH_RSCSR_FRAME_SIZE_MSK);
change = ((il->_4965.stats.general.common.temperature !=
pkt->u.stats.general.common.temperature) ||
((il->_4965.stats.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
(pkt->u.stats.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
#ifdef CONFIG_IWLEGACY_DEBUGFS
il4965_accumulative_stats(il, (__le32 *)&pkt->u.stats);
#endif
/* TODO: reading some of stats is unneeded */
memcpy(&il->_4965.stats, &pkt->u.stats,
sizeof(il->_4965.stats));
set_bit(STATUS_STATISTICS, &il->status);
/* Reschedule the stats timer to occur in
* REG_RECALIB_PERIOD seconds to ensure we get a
* thermal update even if the uCode doesn't give
* us one */
mod_timer(&il->stats_periodic, jiffies +
msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
if (unlikely(!test_bit(STATUS_SCANNING, &il->status)) &&
(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
il4965_rx_calc_noise(il);
queue_work(il->workqueue, &il->run_time_calib_work);
}
if (il->cfg->ops->lib->temp_ops.temperature && change)
il->cfg->ops->lib->temp_ops.temperature(il);
}
void il4965_reply_stats(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
#ifdef CONFIG_IWLEGACY_DEBUGFS
memset(&il->_4965.accum_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.delta_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.max_delta, 0,
sizeof(struct il_notif_stats));
#endif
D_RX("Statistics have been cleared\n");
}
il4965_rx_stats(il, rxb);
}
static const u8 tid_to_ac[] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO
};
static inline int il4965_get_ac_from_tid(u16 tid)
{
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return tid_to_ac[tid];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
static inline int
il4965_get_fifo_from_tid(struct il_rxon_context *ctx, u16 tid)
{
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return ctx->ac_to_fifo[tid_to_ac[tid]];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
/*
* handle build REPLY_TX command notification.
*/
static void il4965_tx_cmd_build_basic(struct il_priv *il,
struct sk_buff *skb,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
struct ieee80211_hdr *hdr,
u8 std_id)
{
__le16 fc = hdr->frame_control;
__le32 tx_flags = tx_cmd->tx_flags;
tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if (ieee80211_is_mgmt(fc))
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ieee80211_is_probe_resp(fc) &&
!(le16_to_cpu(hdr->seq_ctrl) & 0xf))
tx_flags |= TX_CMD_FLG_TSF_MSK;
} else {
tx_flags &= (~TX_CMD_FLG_ACK_MSK);
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
if (ieee80211_is_back_req(fc))
tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
tx_cmd->sta_id = std_id;
if (ieee80211_has_morefrags(fc))
tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
if (ieee80211_is_data_qos(fc)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
} else {
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
il_tx_cmd_protection(il, info, fc, &tx_flags);
tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
if (ieee80211_is_mgmt(fc)) {
if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
else
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
} else {
tx_cmd->timeout.pm_frame_timeout = 0;
}
tx_cmd->driver_txop = 0;
tx_cmd->tx_flags = tx_flags;
tx_cmd->next_frame_len = 0;
}
#define RTS_DFAULT_RETRY_LIMIT 60
static void il4965_tx_cmd_build_rate(struct il_priv *il,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
__le16 fc)
{
u32 rate_flags;
int rate_idx;
u8 rts_retry_limit;
u8 data_retry_limit;
u8 rate_plcp;
/* Set retry limit on DATA packets and Probe Responses*/
if (ieee80211_is_probe_resp(fc))
data_retry_limit = 3;
else
data_retry_limit = IL4965_DEFAULT_TX_RETRY;
tx_cmd->data_retry_limit = data_retry_limit;
/* Set retry limit on RTS packets */
rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
if (data_retry_limit < rts_retry_limit)
rts_retry_limit = data_retry_limit;
tx_cmd->rts_retry_limit = rts_retry_limit;
/* DATA packets will use the uCode station table for rate/antenna
* selection */
if (ieee80211_is_data(fc)) {
tx_cmd->initial_rate_idx = 0;
tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
return;
}
/**
* If the current TX rate stored in mac80211 has the MCS bit set, it's
* not really a TX rate. Thus, we use the lowest supported rate for
* this band. Also use the lowest supported rate if the stored rate
* idx is invalid.
*/
rate_idx = info->control.rates[0].idx;
if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) ||
rate_idx < 0 || rate_idx > RATE_COUNT_LEGACY)
rate_idx = rate_lowest_index(&il->bands[info->band],
info->control.sta);
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == IEEE80211_BAND_5GHZ)
rate_idx += IL_FIRST_OFDM_RATE;
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = il_rates[rate_idx].plcp;
/* Zero out flags for this packet */
rate_flags = 0;
/* Set CCK flag as needed */
if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
/* Set up antennas */
il->mgmt_tx_ant = il4965_toggle_tx_ant(il, il->mgmt_tx_ant,
il->hw_params.valid_tx_ant);
rate_flags |= il4965_ant_idx_to_flags(il->mgmt_tx_ant);
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = il4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
}
static void il4965_tx_cmd_build_hwcrypto(struct il_priv *il,
struct ieee80211_tx_info *info,
struct il_tx_cmd *tx_cmd,
struct sk_buff *skb_frag,
int sta_id)
{
struct ieee80211_key_conf *keyconf = info->control.hw_key;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
D_TX("tx_cmd with AES hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
D_TX("tx_cmd with tkip hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_WEP104:
tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
/* fall through */
case WLAN_CIPHER_SUITE_WEP40:
tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
(keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
D_TX("Configuring packet for WEP encryption "
"with key %d\n", keyconf->keyidx);
break;
default:
IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
break;
}
}
/*
* start REPLY_TX command process
*/
int il4965_tx_skb(struct il_priv *il, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = info->control.sta;
struct il_station_priv *sta_priv = NULL;
struct il_tx_queue *txq;
struct il_queue *q;
struct il_device_cmd *out_cmd;
struct il_cmd_meta *out_meta;
struct il_tx_cmd *tx_cmd;
struct il_rxon_context *ctx = &il->ctx;
int txq_id;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
dma_addr_t scratch_phys;
u16 len, firstlen, secondlen;
u16 seq_number = 0;
__le16 fc;
u8 hdr_len;
u8 sta_id;
u8 wait_write_ptr = 0;
u8 tid = 0;
u8 *qc = NULL;
unsigned long flags;
bool is_agg = false;
if (info->control.vif)
ctx = il_rxon_ctx_from_vif(info->control.vif);
spin_lock_irqsave(&il->lock, flags);
if (il_is_rfkill(il)) {
D_DROP("Dropping - RF KILL\n");
goto drop_unlock;
}
fc = hdr->frame_control;
#ifdef CONFIG_IWLEGACY_DEBUG
if (ieee80211_is_auth(fc))
D_TX("Sending AUTH frame\n");
else if (ieee80211_is_assoc_req(fc))
D_TX("Sending ASSOC frame\n");
else if (ieee80211_is_reassoc_req(fc))
D_TX("Sending REASSOC frame\n");
#endif
hdr_len = ieee80211_hdrlen(fc);
/* For management frames use broadcast id to do not break aggregation */
if (!ieee80211_is_data(fc))
sta_id = ctx->bcast_sta_id;
else {
/* Find idx into station table for destination station */
sta_id = il_sta_id_or_broadcast(il, ctx, info->control.sta);
if (sta_id == IL_INVALID_STATION) {
D_DROP("Dropping - INVALID STATION: %pM\n",
hdr->addr1);
goto drop_unlock;
}
}
D_TX("station Id %d\n", sta_id);
if (sta)
sta_priv = (void *)sta->drv_priv;
if (sta_priv && sta_priv->asleep &&
(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
/*
* This sends an asynchronous command to the device,
* but we can rely on it being processed before the
* next frame is processed -- and the next frame to
* this station is the one that will consume this
* counter.
* For now set the counter to just 1 since we do not
* support uAPSD yet.
*/
il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
}
/*
* Send this frame after DTIM -- there's a special queue
* reserved for this for contexts that support AP mode.
*/
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
txq_id = ctx->mcast_queue;
/*
* The microcode will clear the more data
* bit in the last frame it transmits.
*/
hdr->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
} else
txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
/* irqs already disabled/saved above when locking il->lock */
spin_lock(&il->sta_lock);
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
seq_number = il->stations[sta_id].tid[tid].seq_number;
seq_number &= IEEE80211_SCTL_SEQ;
hdr->seq_ctrl = hdr->seq_ctrl &
cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(seq_number);
seq_number += 0x10;
/* aggregation is on for this <sta,tid> */
if (info->flags & IEEE80211_TX_CTL_AMPDU &&
il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
is_agg = true;
}
}
txq = &il->txq[txq_id];
q = &txq->q;
if (unlikely(il_queue_space(q) < q->high_mark)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
if (ieee80211_is_data_qos(fc)) {
il->stations[sta_id].tid[tid].tfds_in_queue++;
if (!ieee80211_has_morefrags(fc))
il->stations[sta_id].tid[tid].seq_number = seq_number;
}
spin_unlock(&il->sta_lock);
/* Set up driver data for this TFD */
memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct il_tx_info));
txq->txb[q->write_ptr].skb = skb;
txq->txb[q->write_ptr].ctx = ctx;
/* Set up first empty entry in queue's array of Tx/cmd buffers */
out_cmd = txq->cmd[q->write_ptr];
out_meta = &txq->meta[q->write_ptr];
tx_cmd = &out_cmd->cmd.tx;
memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
/*
* Set up the Tx-command (not MAC!) header.
* Store the chosen Tx queue and TFD idx within the sequence field;
* after Tx, uCode's Tx response will return this value so driver can
* locate the frame within the tx queue and do post-tx processing.
*/
out_cmd->hdr.cmd = REPLY_TX;
out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
IDX_TO_SEQ(q->write_ptr)));
/* Copy MAC header from skb into command buffer */
memcpy(tx_cmd->hdr, hdr, hdr_len);
/* Total # bytes to be transmitted */
len = (u16)skb->len;
tx_cmd->len = cpu_to_le16(len);
if (info->control.hw_key)
il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
/* TODO need this for burst mode later on */
il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
il_dbg_log_tx_data_frame(il, len, hdr);
il4965_tx_cmd_build_rate(il, tx_cmd, info, fc);
il_update_stats(il, true, fc, len);
/*
* Use the first empty entry in this queue's command buffer array
* to contain the Tx command and MAC header concatenated together
* (payload data will be in another buffer).
* Size of this varies, due to varying MAC header length.
* If end is not dword aligned, we'll have 2 extra bytes at the end
* of the MAC header (device reads on dword boundaries).
* We'll tell device about this padding later.
*/
len = sizeof(struct il_tx_cmd) +
sizeof(struct il_cmd_header) + hdr_len;
firstlen = (len + 3) & ~3;
/* Tell NIC about any 2-byte padding after MAC header */
if (firstlen != len)
tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
/* Physical address of this Tx command's header (not MAC header!),
* within command buffer array. */
txcmd_phys = pci_map_single(il->pci_dev,
&out_cmd->hdr, firstlen,
PCI_DMA_BIDIRECTIONAL);
dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
dma_unmap_len_set(out_meta, len, firstlen);
/* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */
il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
txcmd_phys, firstlen, 1, 0);
if (!ieee80211_has_morefrags(hdr->frame_control)) {
txq->need_update = 1;
} else {
wait_write_ptr = 1;
txq->need_update = 0;
}
/* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames have no payload). */
secondlen = skb->len - hdr_len;
if (secondlen > 0) {
phys_addr = pci_map_single(il->pci_dev, skb->data + hdr_len,
secondlen, PCI_DMA_TODEVICE);
il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
phys_addr, secondlen,
0, 0);
}
scratch_phys = txcmd_phys + sizeof(struct il_cmd_header) +
offsetof(struct il_tx_cmd, scratch);
/* take back ownership of DMA buffer to enable update */
pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys,
firstlen, PCI_DMA_BIDIRECTIONAL);
tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
D_TX("sequence nr = 0X%x\n",
le16_to_cpu(out_cmd->hdr.sequence));
D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
/* Set up entry for this TFD in Tx byte-count array */
if (info->flags & IEEE80211_TX_CTL_AMPDU)
il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq,
le16_to_cpu(tx_cmd->len));
pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys,
firstlen, PCI_DMA_BIDIRECTIONAL);
/* Tell device the write idx *just past* this latest filled TFD */
q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
/*
* At this point the frame is "transmitted" successfully
* and we will get a TX status notification eventually,
* regardless of the value of ret. "ret" only indicates
* whether or not we should update the write pointer.
*/
/*
* Avoid atomic ops if it isn't an associated client.
* Also, if this is a packet for aggregation, don't
* increase the counter because the ucode will stop
* aggregation queues when their respective station
* goes to sleep.
*/
if (sta_priv && sta_priv->client && !is_agg)
atomic_inc(&sta_priv->pending_frames);
if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&il->lock, flags);
txq->need_update = 1;
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
} else {
il_stop_queue(il, txq);
}
}
return 0;
drop_unlock:
spin_unlock_irqrestore(&il->lock, flags);
return -1;
}
static inline int il4965_alloc_dma_ptr(struct il_priv *il,
struct il_dma_ptr *ptr, size_t size)
{
ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
GFP_KERNEL);
if (!ptr->addr)
return -ENOMEM;
ptr->size = size;
return 0;
}
static inline void il4965_free_dma_ptr(struct il_priv *il,
struct il_dma_ptr *ptr)
{
if (unlikely(!ptr->addr))
return;
dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
memset(ptr, 0, sizeof(*ptr));
}
/**
* il4965_hw_txq_ctx_free - Free TXQ Context
*
* Destroy all TX DMA queues and structures
*/
void il4965_hw_txq_ctx_free(struct il_priv *il)
{
int txq_id;
/* Tx queues */
if (il->txq) {
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_free(il);
else
il_tx_queue_free(il, txq_id);
}
il4965_free_dma_ptr(il, &il->kw);
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
/* free tx queue structure */
il_txq_mem(il);
}
/**
* il4965_txq_ctx_alloc - allocate TX queue context
* Allocate all Tx DMA structures and initialize them
*
* @param il
* @return error code
*/
int il4965_txq_ctx_alloc(struct il_priv *il)
{
int ret;
int txq_id, slots_num;
unsigned long flags;
/* Free all tx/cmd queues and keep-warm buffer */
il4965_hw_txq_ctx_free(il);
ret = il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
il->hw_params.scd_bc_tbls_size);
if (ret) {
IL_ERR("Scheduler BC Table allocation failed\n");
goto error_bc_tbls;
}
/* Alloc keep-warm buffer */
ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
if (ret) {
IL_ERR("Keep Warm allocation failed\n");
goto error_kw;
}
/* allocate tx queue structure */
ret = il_alloc_txq_mem(il);
if (ret)
goto error;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
slots_num = (txq_id == il->cmd_queue) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
ret = il_tx_queue_init(il,
&il->txq[txq_id], slots_num,
txq_id);
if (ret) {
IL_ERR("Tx %d queue init failed\n", txq_id);
goto error;
}
}
return ret;
error:
il4965_hw_txq_ctx_free(il);
il4965_free_dma_ptr(il, &il->kw);
error_kw:
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
error_bc_tbls:
return ret;
}
void il4965_txq_ctx_reset(struct il_priv *il)
{
int txq_id, slots_num;
unsigned long flags;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
slots_num = txq_id == il->cmd_queue ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
il_tx_queue_reset(il, &il->txq[txq_id],
slots_num, txq_id);
}
}
/**
* il4965_txq_ctx_stop - Stop all Tx DMA channels
*/
void il4965_txq_ctx_stop(struct il_priv *il)
{
int ch, txq_id;
unsigned long flags;
/* Turn off all Tx DMA fifos */
spin_lock_irqsave(&il->lock, flags);
il4965_txq_set_sched(il, 0);
/* Stop each Tx DMA channel, and wait for it to be idle */
for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
il_wr(il,
FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
if (il_poll_bit(il, FH_TSSR_TX_STATUS_REG,
FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
1000))
IL_ERR("Failing on timeout while stopping"
" DMA channel %d [0x%08x]", ch,
il_rd(il,
FH_TSSR_TX_STATUS_REG));
}
spin_unlock_irqrestore(&il->lock, flags);
if (!il->txq)
return;
/* Unmap DMA from host system and free skb's */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_unmap(il);
else
il_tx_queue_unmap(il, txq_id);
}
/*
* Find first available (lowest unused) Tx Queue, mark it "active".
* Called only when finding queue for aggregation.
* Should never return anything < 7, because they should already
* be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
*/
static int il4965_txq_ctx_activate_free(struct il_priv *il)
{
int txq_id;
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
return txq_id;
return -1;
}
/**
* il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void il4965_tx_queue_stop_scheduler(struct il_priv *il,
u16 txq_id)
{
/* Simply stop the queue, but don't change any configuration;
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
il_wr_prph(il,
IL49_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
(1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
}
/**
* il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
*/
static int il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid,
u16 txq_id)
{
u32 tbl_dw_addr;
u32 tbl_dw;
u16 scd_q2ratid;
scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
tbl_dw_addr = il->scd_base_addr +
IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
if (txq_id & 0x1)
tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
else
tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
return 0;
}
/**
* il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
*
* NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
* i.e. it must be one of the higher queues used for aggregation
*/
static int il4965_txq_agg_enable(struct il_priv *il, int txq_id,
int tx_fifo, int sta_id, int tid, u16 ssn_idx)
{
unsigned long flags;
u16 ra_tid;
int ret;
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
IL_WARN(
"queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
if (ret)
return ret;
spin_lock_irqsave(&il->lock, flags);
/* Stop this Tx queue before configuring it */
il4965_tx_queue_stop_scheduler(il, txq_id);
/* Map receiver-address / traffic-ID to this queue */
il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
/* Set this queue as a chain-building queue */
il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
/* Place first TFD at idx corresponding to start sequence number.
* Assumes that ssn_idx is valid (!= 0xFFF) */
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
/* Set up Tx win size and frame limit for this queue */
il_write_targ_mem(il,
il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
(SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
il_write_targ_mem(il, il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
(SCD_FRAME_LIMIT << IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
& IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
spin_unlock_irqrestore(&il->lock, flags);
return 0;
}
int il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
int sta_id;
int tx_fifo;
int txq_id;
int ret;
unsigned long flags;
struct il_tid_data *tid_data;
tx_fifo = il4965_get_fifo_from_tid(il_rxon_ctx_from_vif(vif), tid);
if (unlikely(tx_fifo < 0))
return tx_fifo;
IL_WARN("%s on ra = %pM tid = %d\n",
__func__, sta->addr, tid);
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Start AGG on invalid station\n");
return -ENXIO;
}
if (unlikely(tid >= MAX_TID_COUNT))
return -EINVAL;
if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
return -ENXIO;
}
txq_id = il4965_txq_ctx_activate_free(il);
if (txq_id == -1) {
IL_ERR("No free aggregation queue available\n");
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
*ssn = SEQ_TO_SN(tid_data->seq_number);
tid_data->agg.txq_id = txq_id;
il_set_swq_id(&il->txq[txq_id],
il4965_get_ac_from_tid(tid), txq_id);
spin_unlock_irqrestore(&il->sta_lock, flags);
ret = il4965_txq_agg_enable(il, txq_id, tx_fifo,
sta_id, tid, *ssn);
if (ret)
return ret;
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
if (tid_data->tfds_in_queue == 0) {
D_HT("HW queue is empty\n");
tid_data->agg.state = IL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
D_HT(
"HW queue is NOT empty: %d packets in HW queue\n",
tid_data->tfds_in_queue);
tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&il->sta_lock, flags);
return ret;
}
/**
* txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
* il->lock must be held by the caller
*/
static int il4965_txq_agg_disable(struct il_priv *il, u16 txq_id,
u16 ssn_idx, u8 tx_fifo)
{
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
IL_WARN(
"queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
il4965_tx_queue_stop_scheduler(il, txq_id);
il_clear_bits_prph(il,
IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
il_clear_bits_prph(il,
IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
il_txq_ctx_deactivate(il, txq_id);
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
return 0;
}
int il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
int tx_fifo_id, txq_id, sta_id, ssn;
struct il_tid_data *tid_data;
int write_ptr, read_ptr;
unsigned long flags;
tx_fifo_id = il4965_get_fifo_from_tid(il_rxon_ctx_from_vif(vif), tid);
if (unlikely(tx_fifo_id < 0))
return tx_fifo_id;
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Invalid station for AGG tid %d\n", tid);
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
txq_id = tid_data->agg.txq_id;
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_EMPTYING_HW_QUEUE_ADDBA:
/*
* This can happen if the peer stops aggregation
* again before we've had a chance to drain the
* queue we selected previously, i.e. before the
* session was really started completely.
*/
D_HT("AGG stop before setup done\n");
goto turn_off;
case IL_AGG_ON:
break;
default:
IL_WARN("Stopping AGG while state not ON or starting\n");
}
write_ptr = il->txq[txq_id].q.write_ptr;
read_ptr = il->txq[txq_id].q.read_ptr;
/* The queue is not empty */
if (write_ptr != read_ptr) {
D_HT("Stopping a non empty AGG HW QUEUE\n");
il->stations[sta_id].tid[tid].agg.state =
IL_EMPTYING_HW_QUEUE_DELBA;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
D_HT("HW queue is empty\n");
turn_off:
il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
/* do not restore/save irqs */
spin_unlock(&il->sta_lock);
spin_lock(&il->lock);
/*
* the only reason this call can fail is queue number out of range,
* which can happen if uCode is reloaded and all the station
* information are lost. if it is outside the range, there is no need
* to deactivate the uCode queue, just return "success" to allow
* mac80211 to clean up it own data.
*/
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
spin_unlock_irqrestore(&il->lock, flags);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
return 0;
}
int il4965_txq_check_empty(struct il_priv *il,
int sta_id, u8 tid, int txq_id)
{
struct il_queue *q = &il->txq[txq_id].q;
u8 *addr = il->stations[sta_id].sta.sta.addr;
struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
struct il_rxon_context *ctx;
ctx = &il->ctx;
lockdep_assert_held(&il->sta_lock);
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_EMPTYING_HW_QUEUE_DELBA:
/* We are reclaiming the last packet of the */
/* aggregated HW queue */
if (txq_id == tid_data->agg.txq_id &&
q->read_ptr == q->write_ptr) {
u16 ssn = SEQ_TO_SN(tid_data->seq_number);
int tx_fifo = il4965_get_fifo_from_tid(ctx, tid);
D_HT(
"HW queue empty: continue DELBA flow\n");
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
tid_data->agg.state = IL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
}
break;
case IL_EMPTYING_HW_QUEUE_ADDBA:
/* We are reclaiming the last packet of the queue */
if (tid_data->tfds_in_queue == 0) {
D_HT(
"HW queue empty: continue ADDBA flow\n");
tid_data->agg.state = IL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
}
break;
}
return 0;
}
static void il4965_non_agg_tx_status(struct il_priv *il,
struct il_rxon_context *ctx,
const u8 *addr1)
{
struct ieee80211_sta *sta;
struct il_station_priv *sta_priv;
rcu_read_lock();
sta = ieee80211_find_sta(ctx->vif, addr1);
if (sta) {
sta_priv = (void *)sta->drv_priv;
/* avoid atomic ops if this isn't a client */
if (sta_priv->client &&
atomic_dec_return(&sta_priv->pending_frames) == 0)
ieee80211_sta_block_awake(il->hw, sta, false);
}
rcu_read_unlock();
}
static void
il4965_tx_status(struct il_priv *il, struct il_tx_info *tx_info,
bool is_agg)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx_info->skb->data;
if (!is_agg)
il4965_non_agg_tx_status(il, tx_info->ctx, hdr->addr1);
ieee80211_tx_status_irqsafe(il->hw, tx_info->skb);
}
int il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
{
struct il_tx_queue *txq = &il->txq[txq_id];
struct il_queue *q = &txq->q;
struct il_tx_info *tx_info;
int nfreed = 0;
struct ieee80211_hdr *hdr;
if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
"is out of range [0-%d] %d %d.\n", txq_id,
idx, q->n_bd, q->write_ptr, q->read_ptr);
return 0;
}
for (idx = il_queue_inc_wrap(idx, q->n_bd);
q->read_ptr != idx;
q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
tx_info = &txq->txb[txq->q.read_ptr];
if (WARN_ON_ONCE(tx_info->skb == NULL))
continue;
hdr = (struct ieee80211_hdr *)tx_info->skb->data;
if (ieee80211_is_data_qos(hdr->frame_control))
nfreed++;
il4965_tx_status(il, tx_info,
txq_id >= IL4965_FIRST_AMPDU_QUEUE);
tx_info->skb = NULL;
il->cfg->ops->lib->txq_free_tfd(il, txq);
}
return nfreed;
}
/**
* il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
*
* Go through block-ack's bitmap of ACK'd frames, update driver's record of
* ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
*/
static int il4965_tx_status_reply_compressed_ba(struct il_priv *il,
struct il_ht_agg *agg,
struct il_compressed_ba_resp *ba_resp)
{
int i, sh, ack;
u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
int successes = 0;
struct ieee80211_tx_info *info;
u64 bitmap, sent_bitmap;
if (unlikely(!agg->wait_for_ba)) {
if (unlikely(ba_resp->bitmap))
IL_ERR("Received BA when not expected\n");
return -EINVAL;
}
/* Mark that the expected block-ack response arrived */
agg->wait_for_ba = 0;
D_TX_REPLY("BA %d %d\n", agg->start_idx,
ba_resp->seq_ctl);
/* Calculate shift to align block-ack bits with our Tx win bits */
sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
if (sh < 0) /* tbw something is wrong with indices */
sh += 0x100;
if (agg->frame_count > (64 - sh)) {
D_TX_REPLY("more frames than bitmap size");
return -1;
}
/* don't use 64-bit values for now */
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
/* check for success or failure according to the
* transmitted bitmap and block-ack bitmap */
sent_bitmap = bitmap & agg->bitmap;
/* For each frame attempted in aggregation,
* update driver's record of tx frame's status. */
i = 0;
while (sent_bitmap) {
ack = sent_bitmap & 1ULL;
successes += ack;
D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
ack ? "ACK" : "NACK", i,
(agg->start_idx + i) & 0xff,
agg->start_idx + i);
sent_bitmap >>= 1;
++i;
}
D_TX_REPLY("Bitmap %llx\n",
(unsigned long long)bitmap);
info = IEEE80211_SKB_CB(il->txq[scd_flow].txb[agg->start_idx].skb);
memset(&info->status, 0, sizeof(info->status));
info->flags |= IEEE80211_TX_STAT_ACK;
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_ack_len = successes;
info->status.ampdu_len = agg->frame_count;
il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
return 0;
}
/**
* translate ucode response to mac80211 tx status control values
*/
void il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
struct ieee80211_tx_rate *r = &info->control.rates[0];
info->antenna_sel_tx =
((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
if (rate_n_flags & RATE_MCS_HT_MSK)
r->flags |= IEEE80211_TX_RC_MCS;
if (rate_n_flags & RATE_MCS_GF_MSK)
r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
if (rate_n_flags & RATE_MCS_HT40_MSK)
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_n_flags & RATE_MCS_DUP_MSK)
r->flags |= IEEE80211_TX_RC_DUP_DATA;
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
}
/**
* il4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
*
* Handles block-acknowledge notification from device, which reports success
* of frames sent via aggregation.
*/
void il4965_rx_reply_compressed_ba(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
struct il_tx_queue *txq = NULL;
struct il_ht_agg *agg;
int idx;
int sta_id;
int tid;
unsigned long flags;
/* "flow" corresponds to Tx queue */
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
/* "ssn" is start of block-ack Tx win, corresponds to idx
* (in Tx queue's circular buffer) of first TFD/frame in win */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
if (scd_flow >= il->hw_params.max_txq_num) {
IL_ERR(
"BUG_ON scd_flow is bigger than number of queues\n");
return;
}
txq = &il->txq[scd_flow];
sta_id = ba_resp->sta_id;
tid = ba_resp->tid;
agg = &il->stations[sta_id].tid[tid].agg;
if (unlikely(agg->txq_id != scd_flow)) {
/*
* FIXME: this is a uCode bug which need to be addressed,
* log the information and return for now!
* since it is possible happen very often and in order
* not to fill the syslog, don't enable the logging by default
*/
D_TX_REPLY(
"BA scd_flow %d does not match txq_id %d\n",
scd_flow, agg->txq_id);
return;
}
/* Find idx just before block-ack win */
idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
spin_lock_irqsave(&il->sta_lock, flags);
D_TX_REPLY("REPLY_COMPRESSED_BA [%d] Received from %pM, "
"sta_id = %d\n",
agg->wait_for_ba,
(u8 *) &ba_resp->sta_addr_lo32,
ba_resp->sta_id);
D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx,"
"scd_flow = "
"%d, scd_ssn = %d\n",
ba_resp->tid,
ba_resp->seq_ctl,
(unsigned long long)le64_to_cpu(ba_resp->bitmap),
ba_resp->scd_flow,
ba_resp->scd_ssn);
D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n",
agg->start_idx,
(unsigned long long)agg->bitmap);
/* Update driver's record of ACK vs. not for each frame in win */
il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
/* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack win (we assume that they've been successfully
* transmitted ... if not, it's too late anyway). */
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
/* calculate mac80211 ampdu sw queue to wake */
int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
il4965_free_tfds_in_queue(il, sta_id, tid, freed);
if (il_queue_space(&txq->q) > txq->q.low_mark &&
il->mac80211_registered &&
agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
il_wake_queue(il, txq);
il4965_txq_check_empty(il, sta_id, tid, scd_flow);
}
spin_unlock_irqrestore(&il->sta_lock, flags);
}
#ifdef CONFIG_IWLEGACY_DEBUG
const char *il4965_get_tx_fail_reason(u32 status)
{
#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
return "SUCCESS";
TX_STATUS_POSTPONE(DELAY);
TX_STATUS_POSTPONE(FEW_BYTES);
TX_STATUS_POSTPONE(QUIET_PERIOD);
TX_STATUS_POSTPONE(CALC_TTAK);
TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
TX_STATUS_FAIL(SHORT_LIMIT);
TX_STATUS_FAIL(LONG_LIMIT);
TX_STATUS_FAIL(FIFO_UNDERRUN);
TX_STATUS_FAIL(DRAIN_FLOW);
TX_STATUS_FAIL(RFKILL_FLUSH);
TX_STATUS_FAIL(LIFE_EXPIRE);
TX_STATUS_FAIL(DEST_PS);
TX_STATUS_FAIL(HOST_ABORTED);
TX_STATUS_FAIL(BT_RETRY);
TX_STATUS_FAIL(STA_INVALID);
TX_STATUS_FAIL(FRAG_DROPPED);
TX_STATUS_FAIL(TID_DISABLE);
TX_STATUS_FAIL(FIFO_FLUSHED);
TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
TX_STATUS_FAIL(PASSIVE_NO_RX);
TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
}
return "UNKNOWN";
#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CONFIG_IWLEGACY_DEBUG */
static struct il_link_quality_cmd *
il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
{
......
drivers/net/wireless/iwlegacy/Makefile
View file @ a1751b22
......@@ -9,8 +9,7 @@ iwl-legacy-objs += $(iwl-legacy-m)
# 4965
obj-$(CONFIG_IWL4965) += iwl4965.o
iwl4965-objs := 4965.o 4965-mac.o iwl-4965-rs.o
iwl4965-objs += iwl-4965-tx.o
iwl4965-objs += iwl-4965-lib.o iwl-4965-rx.o iwl-4965-calib.o
iwl4965-objs += iwl-4965-lib.o iwl-4965-calib.o
iwl4965-$(CONFIG_IWLEGACY_DEBUGFS) += iwl-4965-debugfs.o
# 3945
......
drivers/net/wireless/iwlegacy/iwl-4965-rx.c deleted 100644 → 0
View file @ eb3cdfb7
/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-4965-calib.h"
#include "iwl-sta.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-4965-hw.h"
#include "iwl-4965.h"
void il4965_rx_missed_beacon_notif(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
il->missed_beacon_threshold) {
D_CALIB(
"missed bcn cnsq %d totl %d rcd %d expctd %d\n",
le32_to_cpu(missed_beacon->consecutive_missed_beacons),
le32_to_cpu(missed_beacon->total_missed_becons),
le32_to_cpu(missed_beacon->num_recvd_beacons),
le32_to_cpu(missed_beacon->num_expected_beacons));
if (!test_bit(STATUS_SCANNING, &il->status))
il4965_init_sensitivity(il);
}
}
/* Calculate noise level, based on measurements during network silence just
* before arriving beacon. This measurement can be done only if we know
* exactly when to expect beacons, therefore only when we're associated. */
static void il4965_rx_calc_noise(struct il_priv *il)
{
struct stats_rx_non_phy *rx_info;
int num_active_rx = 0;
int total_silence = 0;
int bcn_silence_a, bcn_silence_b, bcn_silence_c;
int last_rx_noise;
rx_info = &(il->_4965.stats.rx.general);
bcn_silence_a =
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
bcn_silence_b =
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
bcn_silence_c =
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
if (bcn_silence_a) {
total_silence += bcn_silence_a;
num_active_rx++;
}
if (bcn_silence_b) {
total_silence += bcn_silence_b;
num_active_rx++;
}
if (bcn_silence_c) {
total_silence += bcn_silence_c;
num_active_rx++;
}
/* Average among active antennas */
if (num_active_rx)
last_rx_noise = (total_silence / num_active_rx) - 107;
else
last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
bcn_silence_a, bcn_silence_b, bcn_silence_c,
last_rx_noise);
}
#ifdef CONFIG_IWLEGACY_DEBUGFS
/*
* based on the assumption of all stats counter are in DWORD
* FIXME: This function is for debugging, do not deal with
* the case of counters roll-over.
*/
static void il4965_accumulative_stats(struct il_priv *il,
__le32 *stats)
{
int i, size;
__le32 *prev_stats;
u32 *accum_stats;
u32 *delta, *max_delta;
struct stats_general_common *general, *accum_general;
struct stats_tx *tx, *accum_tx;
prev_stats = (__le32 *)&il->_4965.stats;
accum_stats = (u32 *)&il->_4965.accum_stats;
size = sizeof(struct il_notif_stats);
general = &il->_4965.stats.general.common;
accum_general = &il->_4965.accum_stats.general.common;
tx = &il->_4965.stats.tx;
accum_tx = &il->_4965.accum_stats.tx;
delta = (u32 *)&il->_4965.delta_stats;
max_delta = (u32 *)&il->_4965.max_delta;
for (i = sizeof(__le32); i < size;
i += sizeof(__le32), stats++, prev_stats++, delta++,
max_delta++, accum_stats++) {
if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
*delta = (le32_to_cpu(*stats) -
le32_to_cpu(*prev_stats));
*accum_stats += *delta;
if (*delta > *max_delta)
*max_delta = *delta;
}
}
/* reset accumulative stats for "no-counter" type stats */
accum_general->temperature = general->temperature;
accum_general->ttl_timestamp = general->ttl_timestamp;
}
#endif
#define REG_RECALIB_PERIOD (60)
void il4965_rx_stats(struct il_priv *il,
struct il_rx_buf *rxb)
{
int change;
struct il_rx_pkt *pkt = rxb_addr(rxb);
D_RX(
"Statistics notification received (%d vs %d).\n",
(int)sizeof(struct il_notif_stats),
le32_to_cpu(pkt->len_n_flags) &
FH_RSCSR_FRAME_SIZE_MSK);
change = ((il->_4965.stats.general.common.temperature !=
pkt->u.stats.general.common.temperature) ||
((il->_4965.stats.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
(pkt->u.stats.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
#ifdef CONFIG_IWLEGACY_DEBUGFS
il4965_accumulative_stats(il, (__le32 *)&pkt->u.stats);
#endif
/* TODO: reading some of stats is unneeded */
memcpy(&il->_4965.stats, &pkt->u.stats,
sizeof(il->_4965.stats));
set_bit(STATUS_STATISTICS, &il->status);
/* Reschedule the stats timer to occur in
* REG_RECALIB_PERIOD seconds to ensure we get a
* thermal update even if the uCode doesn't give
* us one */
mod_timer(&il->stats_periodic, jiffies +
msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
if (unlikely(!test_bit(STATUS_SCANNING, &il->status)) &&
(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
il4965_rx_calc_noise(il);
queue_work(il->workqueue, &il->run_time_calib_work);
}
if (il->cfg->ops->lib->temp_ops.temperature && change)
il->cfg->ops->lib->temp_ops.temperature(il);
}
void il4965_reply_stats(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
#ifdef CONFIG_IWLEGACY_DEBUGFS
memset(&il->_4965.accum_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.delta_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.max_delta, 0,
sizeof(struct il_notif_stats));
#endif
D_RX("Statistics have been cleared\n");
}
il4965_rx_stats(il, rxb);
}
drivers/net/wireless/iwlegacy/iwl-4965-tx.c deleted 100644 → 0
View file @ eb3cdfb7
/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-sta.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-4965-hw.h"
#include "iwl-4965.h"
/*
* mac80211 queues, ACs, hardware queues, FIFOs.
*
* Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
*
* Mac80211 uses the following numbers, which we get as from it
* by way of skb_get_queue_mapping(skb):
*
* VO 0
* VI 1
* BE 2
* BK 3
*
*
* Regular (not A-MPDU) frames are put into hardware queues corresponding
* to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
* own queue per aggregation session (RA/TID combination), such queues are
* set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
* order to map frames to the right queue, we also need an AC->hw queue
* mapping. This is implemented here.
*
* Due to the way hw queues are set up (by the hw specific modules like
* iwl-4965.c), the AC->hw queue mapping is the identity
* mapping.
*/
static const u8 tid_to_ac[] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO
};
static inline int il4965_get_ac_from_tid(u16 tid)
{
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return tid_to_ac[tid];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
static inline int
il4965_get_fifo_from_tid(struct il_rxon_context *ctx, u16 tid)
{
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return ctx->ac_to_fifo[tid_to_ac[tid]];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
/*
* handle build REPLY_TX command notification.
*/
static void il4965_tx_cmd_build_basic(struct il_priv *il,
struct sk_buff *skb,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
struct ieee80211_hdr *hdr,
u8 std_id)
{
__le16 fc = hdr->frame_control;
__le32 tx_flags = tx_cmd->tx_flags;
tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if (ieee80211_is_mgmt(fc))
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ieee80211_is_probe_resp(fc) &&
!(le16_to_cpu(hdr->seq_ctrl) & 0xf))
tx_flags |= TX_CMD_FLG_TSF_MSK;
} else {
tx_flags &= (~TX_CMD_FLG_ACK_MSK);
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
if (ieee80211_is_back_req(fc))
tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
tx_cmd->sta_id = std_id;
if (ieee80211_has_morefrags(fc))
tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
if (ieee80211_is_data_qos(fc)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
} else {
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
il_tx_cmd_protection(il, info, fc, &tx_flags);
tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
if (ieee80211_is_mgmt(fc)) {
if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
else
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
} else {
tx_cmd->timeout.pm_frame_timeout = 0;
}
tx_cmd->driver_txop = 0;
tx_cmd->tx_flags = tx_flags;
tx_cmd->next_frame_len = 0;
}
#define RTS_DFAULT_RETRY_LIMIT 60
static void il4965_tx_cmd_build_rate(struct il_priv *il,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
__le16 fc)
{
u32 rate_flags;
int rate_idx;
u8 rts_retry_limit;
u8 data_retry_limit;
u8 rate_plcp;
/* Set retry limit on DATA packets and Probe Responses*/
if (ieee80211_is_probe_resp(fc))
data_retry_limit = 3;
else
data_retry_limit = IL4965_DEFAULT_TX_RETRY;
tx_cmd->data_retry_limit = data_retry_limit;
/* Set retry limit on RTS packets */
rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
if (data_retry_limit < rts_retry_limit)
rts_retry_limit = data_retry_limit;
tx_cmd->rts_retry_limit = rts_retry_limit;
/* DATA packets will use the uCode station table for rate/antenna
* selection */
if (ieee80211_is_data(fc)) {
tx_cmd->initial_rate_idx = 0;
tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
return;
}
/**
* If the current TX rate stored in mac80211 has the MCS bit set, it's
* not really a TX rate. Thus, we use the lowest supported rate for
* this band. Also use the lowest supported rate if the stored rate
* idx is invalid.
*/
rate_idx = info->control.rates[0].idx;
if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) ||
rate_idx < 0 || rate_idx > RATE_COUNT_LEGACY)
rate_idx = rate_lowest_index(&il->bands[info->band],
info->control.sta);
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == IEEE80211_BAND_5GHZ)
rate_idx += IL_FIRST_OFDM_RATE;
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = il_rates[rate_idx].plcp;
/* Zero out flags for this packet */
rate_flags = 0;
/* Set CCK flag as needed */
if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
/* Set up antennas */
il->mgmt_tx_ant = il4965_toggle_tx_ant(il, il->mgmt_tx_ant,
il->hw_params.valid_tx_ant);
rate_flags |= il4965_ant_idx_to_flags(il->mgmt_tx_ant);
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = il4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
}
static void il4965_tx_cmd_build_hwcrypto(struct il_priv *il,
struct ieee80211_tx_info *info,
struct il_tx_cmd *tx_cmd,
struct sk_buff *skb_frag,
int sta_id)
{
struct ieee80211_key_conf *keyconf = info->control.hw_key;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
D_TX("tx_cmd with AES hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
D_TX("tx_cmd with tkip hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_WEP104:
tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
/* fall through */
case WLAN_CIPHER_SUITE_WEP40:
tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
(keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
D_TX("Configuring packet for WEP encryption "
"with key %d\n", keyconf->keyidx);
break;
default:
IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
break;
}
}
/*
* start REPLY_TX command process
*/
int il4965_tx_skb(struct il_priv *il, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = info->control.sta;
struct il_station_priv *sta_priv = NULL;
struct il_tx_queue *txq;
struct il_queue *q;
struct il_device_cmd *out_cmd;
struct il_cmd_meta *out_meta;
struct il_tx_cmd *tx_cmd;
struct il_rxon_context *ctx = &il->ctx;
int txq_id;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
dma_addr_t scratch_phys;
u16 len, firstlen, secondlen;
u16 seq_number = 0;
__le16 fc;
u8 hdr_len;
u8 sta_id;
u8 wait_write_ptr = 0;
u8 tid = 0;
u8 *qc = NULL;
unsigned long flags;
bool is_agg = false;
if (info->control.vif)
ctx = il_rxon_ctx_from_vif(info->control.vif);
spin_lock_irqsave(&il->lock, flags);
if (il_is_rfkill(il)) {
D_DROP("Dropping - RF KILL\n");
goto drop_unlock;
}
fc = hdr->frame_control;
#ifdef CONFIG_IWLEGACY_DEBUG
if (ieee80211_is_auth(fc))
D_TX("Sending AUTH frame\n");
else if (ieee80211_is_assoc_req(fc))
D_TX("Sending ASSOC frame\n");
else if (ieee80211_is_reassoc_req(fc))
D_TX("Sending REASSOC frame\n");
#endif
hdr_len = ieee80211_hdrlen(fc);
/* For management frames use broadcast id to do not break aggregation */
if (!ieee80211_is_data(fc))
sta_id = ctx->bcast_sta_id;
else {
/* Find idx into station table for destination station */
sta_id = il_sta_id_or_broadcast(il, ctx, info->control.sta);
if (sta_id == IL_INVALID_STATION) {
D_DROP("Dropping - INVALID STATION: %pM\n",
hdr->addr1);
goto drop_unlock;
}
}
D_TX("station Id %d\n", sta_id);
if (sta)
sta_priv = (void *)sta->drv_priv;
if (sta_priv && sta_priv->asleep &&
(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
/*
* This sends an asynchronous command to the device,
* but we can rely on it being processed before the
* next frame is processed -- and the next frame to
* this station is the one that will consume this
* counter.
* For now set the counter to just 1 since we do not
* support uAPSD yet.
*/
il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
}
/*
* Send this frame after DTIM -- there's a special queue
* reserved for this for contexts that support AP mode.
*/
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
txq_id = ctx->mcast_queue;
/*
* The microcode will clear the more data
* bit in the last frame it transmits.
*/
hdr->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
} else
txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
/* irqs already disabled/saved above when locking il->lock */
spin_lock(&il->sta_lock);
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
seq_number = il->stations[sta_id].tid[tid].seq_number;
seq_number &= IEEE80211_SCTL_SEQ;
hdr->seq_ctrl = hdr->seq_ctrl &
cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(seq_number);
seq_number += 0x10;
/* aggregation is on for this <sta,tid> */
if (info->flags & IEEE80211_TX_CTL_AMPDU &&
il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
is_agg = true;
}
}
txq = &il->txq[txq_id];
q = &txq->q;
if (unlikely(il_queue_space(q) < q->high_mark)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
if (ieee80211_is_data_qos(fc)) {
il->stations[sta_id].tid[tid].tfds_in_queue++;
if (!ieee80211_has_morefrags(fc))
il->stations[sta_id].tid[tid].seq_number = seq_number;
}
spin_unlock(&il->sta_lock);
/* Set up driver data for this TFD */
memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct il_tx_info));
txq->txb[q->write_ptr].skb = skb;
txq->txb[q->write_ptr].ctx = ctx;
/* Set up first empty entry in queue's array of Tx/cmd buffers */
out_cmd = txq->cmd[q->write_ptr];
out_meta = &txq->meta[q->write_ptr];
tx_cmd = &out_cmd->cmd.tx;
memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
/*
* Set up the Tx-command (not MAC!) header.
* Store the chosen Tx queue and TFD idx within the sequence field;
* after Tx, uCode's Tx response will return this value so driver can
* locate the frame within the tx queue and do post-tx processing.
*/
out_cmd->hdr.cmd = REPLY_TX;
out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
IDX_TO_SEQ(q->write_ptr)));
/* Copy MAC header from skb into command buffer */
memcpy(tx_cmd->hdr, hdr, hdr_len);
/* Total # bytes to be transmitted */
len = (u16)skb->len;
tx_cmd->len = cpu_to_le16(len);
if (info->control.hw_key)
il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
/* TODO need this for burst mode later on */
il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
il_dbg_log_tx_data_frame(il, len, hdr);
il4965_tx_cmd_build_rate(il, tx_cmd, info, fc);
il_update_stats(il, true, fc, len);
/*
* Use the first empty entry in this queue's command buffer array
* to contain the Tx command and MAC header concatenated together
* (payload data will be in another buffer).
* Size of this varies, due to varying MAC header length.
* If end is not dword aligned, we'll have 2 extra bytes at the end
* of the MAC header (device reads on dword boundaries).
* We'll tell device about this padding later.
*/
len = sizeof(struct il_tx_cmd) +
sizeof(struct il_cmd_header) + hdr_len;
firstlen = (len + 3) & ~3;
/* Tell NIC about any 2-byte padding after MAC header */
if (firstlen != len)
tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
/* Physical address of this Tx command's header (not MAC header!),
* within command buffer array. */
txcmd_phys = pci_map_single(il->pci_dev,
&out_cmd->hdr, firstlen,
PCI_DMA_BIDIRECTIONAL);
dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
dma_unmap_len_set(out_meta, len, firstlen);
/* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */
il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
txcmd_phys, firstlen, 1, 0);
if (!ieee80211_has_morefrags(hdr->frame_control)) {
txq->need_update = 1;
} else {
wait_write_ptr = 1;
txq->need_update = 0;
}
/* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames have no payload). */
secondlen = skb->len - hdr_len;
if (secondlen > 0) {
phys_addr = pci_map_single(il->pci_dev, skb->data + hdr_len,
secondlen, PCI_DMA_TODEVICE);
il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
phys_addr, secondlen,
0, 0);
}
scratch_phys = txcmd_phys + sizeof(struct il_cmd_header) +
offsetof(struct il_tx_cmd, scratch);
/* take back ownership of DMA buffer to enable update */
pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys,
firstlen, PCI_DMA_BIDIRECTIONAL);
tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
D_TX("sequence nr = 0X%x\n",
le16_to_cpu(out_cmd->hdr.sequence));
D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
/* Set up entry for this TFD in Tx byte-count array */
if (info->flags & IEEE80211_TX_CTL_AMPDU)
il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq,
le16_to_cpu(tx_cmd->len));
pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys,
firstlen, PCI_DMA_BIDIRECTIONAL);
/* Tell device the write idx *just past* this latest filled TFD */
q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
/*
* At this point the frame is "transmitted" successfully
* and we will get a TX status notification eventually,
* regardless of the value of ret. "ret" only indicates
* whether or not we should update the write pointer.
*/
/*
* Avoid atomic ops if it isn't an associated client.
* Also, if this is a packet for aggregation, don't
* increase the counter because the ucode will stop
* aggregation queues when their respective station
* goes to sleep.
*/
if (sta_priv && sta_priv->client && !is_agg)
atomic_inc(&sta_priv->pending_frames);
if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&il->lock, flags);
txq->need_update = 1;
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
} else {
il_stop_queue(il, txq);
}
}
return 0;
drop_unlock:
spin_unlock_irqrestore(&il->lock, flags);
return -1;
}
static inline int il4965_alloc_dma_ptr(struct il_priv *il,
struct il_dma_ptr *ptr, size_t size)
{
ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
GFP_KERNEL);
if (!ptr->addr)
return -ENOMEM;
ptr->size = size;
return 0;
}
static inline void il4965_free_dma_ptr(struct il_priv *il,
struct il_dma_ptr *ptr)
{
if (unlikely(!ptr->addr))
return;
dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
memset(ptr, 0, sizeof(*ptr));
}
/**
* il4965_hw_txq_ctx_free - Free TXQ Context
*
* Destroy all TX DMA queues and structures
*/
void il4965_hw_txq_ctx_free(struct il_priv *il)
{
int txq_id;
/* Tx queues */
if (il->txq) {
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_free(il);
else
il_tx_queue_free(il, txq_id);
}
il4965_free_dma_ptr(il, &il->kw);
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
/* free tx queue structure */
il_txq_mem(il);
}
/**
* il4965_txq_ctx_alloc - allocate TX queue context
* Allocate all Tx DMA structures and initialize them
*
* @param il
* @return error code
*/
int il4965_txq_ctx_alloc(struct il_priv *il)
{
int ret;
int txq_id, slots_num;
unsigned long flags;
/* Free all tx/cmd queues and keep-warm buffer */
il4965_hw_txq_ctx_free(il);
ret = il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
il->hw_params.scd_bc_tbls_size);
if (ret) {
IL_ERR("Scheduler BC Table allocation failed\n");
goto error_bc_tbls;
}
/* Alloc keep-warm buffer */
ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
if (ret) {
IL_ERR("Keep Warm allocation failed\n");
goto error_kw;
}
/* allocate tx queue structure */
ret = il_alloc_txq_mem(il);
if (ret)
goto error;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
slots_num = (txq_id == il->cmd_queue) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
ret = il_tx_queue_init(il,
&il->txq[txq_id], slots_num,
txq_id);
if (ret) {
IL_ERR("Tx %d queue init failed\n", txq_id);
goto error;
}
}
return ret;
error:
il4965_hw_txq_ctx_free(il);
il4965_free_dma_ptr(il, &il->kw);
error_kw:
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
error_bc_tbls:
return ret;
}
void il4965_txq_ctx_reset(struct il_priv *il)
{
int txq_id, slots_num;
unsigned long flags;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
slots_num = txq_id == il->cmd_queue ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
il_tx_queue_reset(il, &il->txq[txq_id],
slots_num, txq_id);
}
}
/**
* il4965_txq_ctx_stop - Stop all Tx DMA channels
*/
void il4965_txq_ctx_stop(struct il_priv *il)
{
int ch, txq_id;
unsigned long flags;
/* Turn off all Tx DMA fifos */
spin_lock_irqsave(&il->lock, flags);
il4965_txq_set_sched(il, 0);
/* Stop each Tx DMA channel, and wait for it to be idle */
for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
il_wr(il,
FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
if (il_poll_bit(il, FH_TSSR_TX_STATUS_REG,
FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
1000))
IL_ERR("Failing on timeout while stopping"
" DMA channel %d [0x%08x]", ch,
il_rd(il,
FH_TSSR_TX_STATUS_REG));
}
spin_unlock_irqrestore(&il->lock, flags);
if (!il->txq)
return;
/* Unmap DMA from host system and free skb's */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_unmap(il);
else
il_tx_queue_unmap(il, txq_id);
}
/*
* Find first available (lowest unused) Tx Queue, mark it "active".
* Called only when finding queue for aggregation.
* Should never return anything < 7, because they should already
* be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
*/
static int il4965_txq_ctx_activate_free(struct il_priv *il)
{
int txq_id;
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
return txq_id;
return -1;
}
/**
* il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void il4965_tx_queue_stop_scheduler(struct il_priv *il,
u16 txq_id)
{
/* Simply stop the queue, but don't change any configuration;
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
il_wr_prph(il,
IL49_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
(1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
}
/**
* il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
*/
static int il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid,
u16 txq_id)
{
u32 tbl_dw_addr;
u32 tbl_dw;
u16 scd_q2ratid;
scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
tbl_dw_addr = il->scd_base_addr +
IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
if (txq_id & 0x1)
tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
else
tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
return 0;
}
/**
* il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
*
* NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
* i.e. it must be one of the higher queues used for aggregation
*/
static int il4965_txq_agg_enable(struct il_priv *il, int txq_id,
int tx_fifo, int sta_id, int tid, u16 ssn_idx)
{
unsigned long flags;
u16 ra_tid;
int ret;
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
IL_WARN(
"queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
if (ret)
return ret;
spin_lock_irqsave(&il->lock, flags);
/* Stop this Tx queue before configuring it */
il4965_tx_queue_stop_scheduler(il, txq_id);
/* Map receiver-address / traffic-ID to this queue */
il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
/* Set this queue as a chain-building queue */
il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
/* Place first TFD at idx corresponding to start sequence number.
* Assumes that ssn_idx is valid (!= 0xFFF) */
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
/* Set up Tx win size and frame limit for this queue */
il_write_targ_mem(il,
il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
(SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
il_write_targ_mem(il, il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
(SCD_FRAME_LIMIT << IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
& IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
spin_unlock_irqrestore(&il->lock, flags);
return 0;
}
int il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
int sta_id;
int tx_fifo;
int txq_id;
int ret;
unsigned long flags;
struct il_tid_data *tid_data;
tx_fifo = il4965_get_fifo_from_tid(il_rxon_ctx_from_vif(vif), tid);
if (unlikely(tx_fifo < 0))
return tx_fifo;
IL_WARN("%s on ra = %pM tid = %d\n",
__func__, sta->addr, tid);
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Start AGG on invalid station\n");
return -ENXIO;
}
if (unlikely(tid >= MAX_TID_COUNT))
return -EINVAL;
if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
return -ENXIO;
}
txq_id = il4965_txq_ctx_activate_free(il);
if (txq_id == -1) {
IL_ERR("No free aggregation queue available\n");
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
*ssn = SEQ_TO_SN(tid_data->seq_number);
tid_data->agg.txq_id = txq_id;
il_set_swq_id(&il->txq[txq_id],
il4965_get_ac_from_tid(tid), txq_id);
spin_unlock_irqrestore(&il->sta_lock, flags);
ret = il4965_txq_agg_enable(il, txq_id, tx_fifo,
sta_id, tid, *ssn);
if (ret)
return ret;
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
if (tid_data->tfds_in_queue == 0) {
D_HT("HW queue is empty\n");
tid_data->agg.state = IL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
D_HT(
"HW queue is NOT empty: %d packets in HW queue\n",
tid_data->tfds_in_queue);
tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&il->sta_lock, flags);
return ret;
}
/**
* txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
* il->lock must be held by the caller
*/
static int il4965_txq_agg_disable(struct il_priv *il, u16 txq_id,
u16 ssn_idx, u8 tx_fifo)
{
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues <= txq_id)) {
IL_WARN(
"queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
il4965_tx_queue_stop_scheduler(il, txq_id);
il_clear_bits_prph(il,
IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
il_clear_bits_prph(il,
IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
il_txq_ctx_deactivate(il, txq_id);
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
return 0;
}
int il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
int tx_fifo_id, txq_id, sta_id, ssn;
struct il_tid_data *tid_data;
int write_ptr, read_ptr;
unsigned long flags;
tx_fifo_id = il4965_get_fifo_from_tid(il_rxon_ctx_from_vif(vif), tid);
if (unlikely(tx_fifo_id < 0))
return tx_fifo_id;
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Invalid station for AGG tid %d\n", tid);
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
txq_id = tid_data->agg.txq_id;
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_EMPTYING_HW_QUEUE_ADDBA:
/*
* This can happen if the peer stops aggregation
* again before we've had a chance to drain the
* queue we selected previously, i.e. before the
* session was really started completely.
*/
D_HT("AGG stop before setup done\n");
goto turn_off;
case IL_AGG_ON:
break;
default:
IL_WARN("Stopping AGG while state not ON or starting\n");
}
write_ptr = il->txq[txq_id].q.write_ptr;
read_ptr = il->txq[txq_id].q.read_ptr;
/* The queue is not empty */
if (write_ptr != read_ptr) {
D_HT("Stopping a non empty AGG HW QUEUE\n");
il->stations[sta_id].tid[tid].agg.state =
IL_EMPTYING_HW_QUEUE_DELBA;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
D_HT("HW queue is empty\n");
turn_off:
il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
/* do not restore/save irqs */
spin_unlock(&il->sta_lock);
spin_lock(&il->lock);
/*
* the only reason this call can fail is queue number out of range,
* which can happen if uCode is reloaded and all the station
* information are lost. if it is outside the range, there is no need
* to deactivate the uCode queue, just return "success" to allow
* mac80211 to clean up it own data.
*/
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
spin_unlock_irqrestore(&il->lock, flags);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
return 0;
}
int il4965_txq_check_empty(struct il_priv *il,
int sta_id, u8 tid, int txq_id)
{
struct il_queue *q = &il->txq[txq_id].q;
u8 *addr = il->stations[sta_id].sta.sta.addr;
struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
struct il_rxon_context *ctx;
ctx = &il->ctx;
lockdep_assert_held(&il->sta_lock);
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_EMPTYING_HW_QUEUE_DELBA:
/* We are reclaiming the last packet of the */
/* aggregated HW queue */
if (txq_id == tid_data->agg.txq_id &&
q->read_ptr == q->write_ptr) {
u16 ssn = SEQ_TO_SN(tid_data->seq_number);
int tx_fifo = il4965_get_fifo_from_tid(ctx, tid);
D_HT(
"HW queue empty: continue DELBA flow\n");
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
tid_data->agg.state = IL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
}
break;
case IL_EMPTYING_HW_QUEUE_ADDBA:
/* We are reclaiming the last packet of the queue */
if (tid_data->tfds_in_queue == 0) {
D_HT(
"HW queue empty: continue ADDBA flow\n");
tid_data->agg.state = IL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
}
break;
}
return 0;
}
static void il4965_non_agg_tx_status(struct il_priv *il,
struct il_rxon_context *ctx,
const u8 *addr1)
{
struct ieee80211_sta *sta;
struct il_station_priv *sta_priv;
rcu_read_lock();
sta = ieee80211_find_sta(ctx->vif, addr1);
if (sta) {
sta_priv = (void *)sta->drv_priv;
/* avoid atomic ops if this isn't a client */
if (sta_priv->client &&
atomic_dec_return(&sta_priv->pending_frames) == 0)
ieee80211_sta_block_awake(il->hw, sta, false);
}
rcu_read_unlock();
}
static void
il4965_tx_status(struct il_priv *il, struct il_tx_info *tx_info,
bool is_agg)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx_info->skb->data;
if (!is_agg)
il4965_non_agg_tx_status(il, tx_info->ctx, hdr->addr1);
ieee80211_tx_status_irqsafe(il->hw, tx_info->skb);
}
int il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
{
struct il_tx_queue *txq = &il->txq[txq_id];
struct il_queue *q = &txq->q;
struct il_tx_info *tx_info;
int nfreed = 0;
struct ieee80211_hdr *hdr;
if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
"is out of range [0-%d] %d %d.\n", txq_id,
idx, q->n_bd, q->write_ptr, q->read_ptr);
return 0;
}
for (idx = il_queue_inc_wrap(idx, q->n_bd);
q->read_ptr != idx;
q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
tx_info = &txq->txb[txq->q.read_ptr];
if (WARN_ON_ONCE(tx_info->skb == NULL))
continue;
hdr = (struct ieee80211_hdr *)tx_info->skb->data;
if (ieee80211_is_data_qos(hdr->frame_control))
nfreed++;
il4965_tx_status(il, tx_info,
txq_id >= IL4965_FIRST_AMPDU_QUEUE);
tx_info->skb = NULL;
il->cfg->ops->lib->txq_free_tfd(il, txq);
}
return nfreed;
}
/**
* il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
*
* Go through block-ack's bitmap of ACK'd frames, update driver's record of
* ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
*/
static int il4965_tx_status_reply_compressed_ba(struct il_priv *il,
struct il_ht_agg *agg,
struct il_compressed_ba_resp *ba_resp)
{
int i, sh, ack;
u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
int successes = 0;
struct ieee80211_tx_info *info;
u64 bitmap, sent_bitmap;
if (unlikely(!agg->wait_for_ba)) {
if (unlikely(ba_resp->bitmap))
IL_ERR("Received BA when not expected\n");
return -EINVAL;
}
/* Mark that the expected block-ack response arrived */
agg->wait_for_ba = 0;
D_TX_REPLY("BA %d %d\n", agg->start_idx,
ba_resp->seq_ctl);
/* Calculate shift to align block-ack bits with our Tx win bits */
sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
if (sh < 0) /* tbw something is wrong with indices */
sh += 0x100;
if (agg->frame_count > (64 - sh)) {
D_TX_REPLY("more frames than bitmap size");
return -1;
}
/* don't use 64-bit values for now */
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
/* check for success or failure according to the
* transmitted bitmap and block-ack bitmap */
sent_bitmap = bitmap & agg->bitmap;
/* For each frame attempted in aggregation,
* update driver's record of tx frame's status. */
i = 0;
while (sent_bitmap) {
ack = sent_bitmap & 1ULL;
successes += ack;
D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
ack ? "ACK" : "NACK", i,
(agg->start_idx + i) & 0xff,
agg->start_idx + i);
sent_bitmap >>= 1;
++i;
}
D_TX_REPLY("Bitmap %llx\n",
(unsigned long long)bitmap);
info = IEEE80211_SKB_CB(il->txq[scd_flow].txb[agg->start_idx].skb);
memset(&info->status, 0, sizeof(info->status));
info->flags |= IEEE80211_TX_STAT_ACK;
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_ack_len = successes;
info->status.ampdu_len = agg->frame_count;
il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
return 0;
}
/**
* translate ucode response to mac80211 tx status control values
*/
void il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
struct ieee80211_tx_rate *r = &info->control.rates[0];
info->antenna_sel_tx =
((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
if (rate_n_flags & RATE_MCS_HT_MSK)
r->flags |= IEEE80211_TX_RC_MCS;
if (rate_n_flags & RATE_MCS_GF_MSK)
r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
if (rate_n_flags & RATE_MCS_HT40_MSK)
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_n_flags & RATE_MCS_DUP_MSK)
r->flags |= IEEE80211_TX_RC_DUP_DATA;
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
}
/**
* il4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
*
* Handles block-acknowledge notification from device, which reports success
* of frames sent via aggregation.
*/
void il4965_rx_reply_compressed_ba(struct il_priv *il,
struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
struct il_tx_queue *txq = NULL;
struct il_ht_agg *agg;
int idx;
int sta_id;
int tid;
unsigned long flags;
/* "flow" corresponds to Tx queue */
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
/* "ssn" is start of block-ack Tx win, corresponds to idx
* (in Tx queue's circular buffer) of first TFD/frame in win */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
if (scd_flow >= il->hw_params.max_txq_num) {
IL_ERR(
"BUG_ON scd_flow is bigger than number of queues\n");
return;
}
txq = &il->txq[scd_flow];
sta_id = ba_resp->sta_id;
tid = ba_resp->tid;
agg = &il->stations[sta_id].tid[tid].agg;
if (unlikely(agg->txq_id != scd_flow)) {
/*
* FIXME: this is a uCode bug which need to be addressed,
* log the information and return for now!
* since it is possible happen very often and in order
* not to fill the syslog, don't enable the logging by default
*/
D_TX_REPLY(
"BA scd_flow %d does not match txq_id %d\n",
scd_flow, agg->txq_id);
return;
}
/* Find idx just before block-ack win */
idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
spin_lock_irqsave(&il->sta_lock, flags);
D_TX_REPLY("REPLY_COMPRESSED_BA [%d] Received from %pM, "
"sta_id = %d\n",
agg->wait_for_ba,
(u8 *) &ba_resp->sta_addr_lo32,
ba_resp->sta_id);
D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx,"
"scd_flow = "
"%d, scd_ssn = %d\n",
ba_resp->tid,
ba_resp->seq_ctl,
(unsigned long long)le64_to_cpu(ba_resp->bitmap),
ba_resp->scd_flow,
ba_resp->scd_ssn);
D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n",
agg->start_idx,
(unsigned long long)agg->bitmap);
/* Update driver's record of ACK vs. not for each frame in win */
il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
/* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack win (we assume that they've been successfully
* transmitted ... if not, it's too late anyway). */
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
/* calculate mac80211 ampdu sw queue to wake */
int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
il4965_free_tfds_in_queue(il, sta_id, tid, freed);
if (il_queue_space(&txq->q) > txq->q.low_mark &&
il->mac80211_registered &&
agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
il_wake_queue(il, txq);
il4965_txq_check_empty(il, sta_id, tid, scd_flow);
}
spin_unlock_irqrestore(&il->sta_lock, flags);
}
#ifdef CONFIG_IWLEGACY_DEBUG
const char *il4965_get_tx_fail_reason(u32 status)
{
#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
return "SUCCESS";
TX_STATUS_POSTPONE(DELAY);
TX_STATUS_POSTPONE(FEW_BYTES);
TX_STATUS_POSTPONE(QUIET_PERIOD);
TX_STATUS_POSTPONE(CALC_TTAK);
TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
TX_STATUS_FAIL(SHORT_LIMIT);
TX_STATUS_FAIL(LONG_LIMIT);
TX_STATUS_FAIL(FIFO_UNDERRUN);
TX_STATUS_FAIL(DRAIN_FLOW);
TX_STATUS_FAIL(RFKILL_FLUSH);
TX_STATUS_FAIL(LIFE_EXPIRE);
TX_STATUS_FAIL(DEST_PS);
TX_STATUS_FAIL(HOST_ABORTED);
TX_STATUS_FAIL(BT_RETRY);
TX_STATUS_FAIL(STA_INVALID);
TX_STATUS_FAIL(FRAG_DROPPED);
TX_STATUS_FAIL(TID_DISABLE);
TX_STATUS_FAIL(FIFO_FLUSHED);
TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
TX_STATUS_FAIL(PASSIVE_NO_RX);
TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
}
return "UNKNOWN";
#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CONFIG_IWLEGACY_DEBUG */
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