return iwm_hal_send_target_cmd(iwm, &target_cmd, NULL);
}
+
+int iwm_send_umac_stop_resume_tx(struct iwm_priv *iwm,
+ struct iwm_umac_notif_stop_resume_tx *ntf)
+{
+ struct iwm_udma_wifi_cmd udma_cmd = UDMA_UMAC_INIT;
+ struct iwm_umac_cmd umac_cmd;
+ struct iwm_umac_cmd_stop_resume_tx stp_res_cmd;
+ struct iwm_sta_info *sta_info;
+ u8 sta_id = STA_ID_N_COLOR_ID(ntf->sta_id);
+ int i;
+
+ sta_info = &iwm->sta_table[sta_id];
+ if (!sta_info->valid) {
+ IWM_ERR(iwm, "Invalid STA: %d\n", sta_id);
+ return -EINVAL;
+ }
+
+ umac_cmd.id = UMAC_CMD_OPCODE_STOP_RESUME_STA_TX;
+ umac_cmd.resp = 0;
+
+ stp_res_cmd.flags = ntf->flags;
+ stp_res_cmd.sta_id = ntf->sta_id;
+ stp_res_cmd.stop_resume_tid_msk = ntf->stop_resume_tid_msk;
+ for (i = 0; i < IWM_UMAC_TID_NR; i++)
+ stp_res_cmd.last_seq_num[i] =
+ sta_info->tid_info[i].last_seq_num;
+
+ return iwm_hal_send_umac_cmd(iwm, &udma_cmd, &umac_cmd, &stp_res_cmd,
+ sizeof(struct iwm_umac_cmd_stop_resume_tx));
+
+}
__le32 flags;
} __attribute__ ((packed));
+struct iwm_umac_cmd_stop_resume_tx {
+ u8 flags;
+ u8 sta_id;
+ __le16 stop_resume_tid_msk;
+ __le16 last_seq_num[IWM_UMAC_TID_NR];
+ u16 reserved;
+} __attribute__ ((packed));
+
/* LMAC commands */
int iwm_read_mac(struct iwm_priv *iwm, u8 *mac);
int iwm_send_prio_table(struct iwm_priv *iwm);
int iwm_scan_ssids(struct iwm_priv *iwm, struct cfg80211_ssid *ssids,
int ssid_num);
int iwm_scan_one_ssid(struct iwm_priv *iwm, u8 *ssid, int ssid_len);
+int iwm_send_umac_stop_resume_tx(struct iwm_priv *iwm,
+ struct iwm_umac_notif_stop_resume_tx *ntf);
/* UDMA commands */
int iwm_target_reset(struct iwm_priv *iwm);
unsigned long buf_size;
};
+struct iwm_tid_info {
+ __le16 last_seq_num;
+ bool stopped;
+ struct mutex mutex;
+};
+
struct iwm_sta_info {
u8 addr[ETH_ALEN];
bool valid;
bool qos;
u8 color;
+ struct iwm_tid_info tid_info[IWM_UMAC_TID_NR];
};
struct iwm_tx_info {
struct iwm_tx_queue {
int id;
struct sk_buff_head queue;
+ struct sk_buff_head stopped_queue;
+ spinlock_t lock;
struct workqueue_struct *wq;
struct work_struct worker;
u8 concat_buf[IWM_HAL_CONCATENATE_BUF_SIZE];
int iwm_down(struct iwm_priv *iwm);
/* TX API */
+u16 iwm_tid_to_queue(u16 tid);
void iwm_tx_credit_inc(struct iwm_priv *iwm, int id, int total_freed_pages);
void iwm_tx_worker(struct work_struct *work);
int iwm_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
int iwm_priv_init(struct iwm_priv *iwm)
{
- int i;
+ int i, j;
char name[32];
iwm->status = 0;
return -EAGAIN;
skb_queue_head_init(&iwm->txq[i].queue);
+ skb_queue_head_init(&iwm->txq[i].stopped_queue);
+ spin_lock_init(&iwm->txq[i].lock);
}
for (i = 0; i < IWM_NUM_KEYS; i++)
iwm->default_key = -1;
+ for (i = 0; i < IWM_STA_TABLE_NUM; i++)
+ for (j = 0; j < IWM_UMAC_TID_NR; j++) {
+ mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
+ iwm->sta_table[i].tid_info[j].stopped = false;
+ }
+
init_timer(&iwm->watchdog);
iwm->watchdog.function = iwm_watchdog;
iwm->watchdog.data = (unsigned long)iwm;
for (i = 0; i < IWM_TX_QUEUES; i++) {
skb_queue_purge(&iwm->txq[i].queue);
+ skb_queue_purge(&iwm->txq[i].stopped_queue);
iwm->txq[i].concat_count = 0;
iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
*/
static const u16 iwm_1d_to_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 };
+u16 iwm_tid_to_queue(u16 tid)
+{
+ if (tid > IWM_UMAC_TID_NR - 2)
+ return -EINVAL;
+
+ return iwm_1d_to_queue[tid];
+}
+
static u16 iwm_select_queue(struct net_device *dev, struct sk_buff *skb)
{
skb->priority = cfg80211_classify8021d(skb);
return 0;
}
+static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
+ unsigned long buf_size,
+ struct iwm_wifi_cmd *cmd)
+{
+ struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
+ (struct iwm_umac_notif_stop_resume_tx *)buf;
+ struct iwm_sta_info *sta_info;
+ struct iwm_tid_info *tid_info;
+ u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
+ u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
+ int bit, ret = 0;
+ bool stop = false;
+
+ IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
+ "\tflags: 0x%x\n"
+ "\tSTA id: %d\n"
+ "\tTID bitmask: 0x%x\n",
+ stp_res_tx->flags, stp_res_tx->sta_id,
+ stp_res_tx->stop_resume_tid_msk);
+
+ if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
+ stop = true;
+
+ sta_info = &iwm->sta_table[sta_id];
+ if (!sta_info->valid) {
+ IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
+ sta_id, stp_res_tx->sta_id);
+ return -EINVAL;
+ }
+
+ for_each_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
+ tid_info = &sta_info->tid_info[bit];
+
+ mutex_lock(&tid_info->mutex);
+ tid_info->stopped = stop;
+ mutex_unlock(&tid_info->mutex);
+
+ if (!stop) {
+ struct iwm_tx_queue *txq;
+ u16 queue = iwm_tid_to_queue(bit);
+
+ if (queue < 0)
+ continue;
+
+ txq = &iwm->txq[queue];
+ /*
+ * If we resume, we have to move our SKBs
+ * back to the tx queue and queue some work.
+ */
+ spin_lock_bh(&txq->lock);
+ skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
+ spin_unlock_bh(&txq->lock);
+
+ queue_work(txq->wq, &txq->worker);
+ }
+
+ }
+
+ /* We send an ACK only for the stop case */
+ if (stop)
+ ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
+
+ return ret;
+}
+
static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
unsigned long buf_size,
struct iwm_wifi_cmd *cmd)
[UMAC_NOTIFY_OPCODE_STATS] = iwm_ntf_statistics,
[UMAC_CMD_OPCODE_EEPROM_PROXY] = iwm_ntf_eeprom_proxy,
[UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST] = iwm_ntf_channel_info_list,
+ [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX] = iwm_ntf_stop_resume_tx,
[REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet,
[UMAC_CMD_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_wifi_if_wrapper,
};
memcpy(buf + sizeof(*hdr), skb->data, skb->len);
- return 0;
+ return umac_cmd.seq_num;
}
static int iwm_tx_send_concat_packets(struct iwm_priv *iwm,
struct iwm_priv *iwm;
struct iwm_tx_info *tx_info = NULL;
struct sk_buff *skb;
- int cmdlen, ret;
struct iwm_tx_queue *txq;
- int pool_id;
+ struct iwm_sta_info *sta_info;
+ struct iwm_tid_info *tid_info;
+ int cmdlen, ret, pool_id;
txq = container_of(work, struct iwm_tx_queue, worker);
iwm = container_of(txq, struct iwm_priv, txq[txq->id]);
while (!test_bit(pool_id, &iwm->tx_credit.full_pools_map) &&
!skb_queue_empty(&txq->queue)) {
+ spin_lock_bh(&txq->lock);
skb = skb_dequeue(&txq->queue);
+ spin_unlock_bh(&txq->lock);
+
tx_info = skb_to_tx_info(skb);
+ sta_info = &iwm->sta_table[tx_info->sta];
+ if (!sta_info->valid) {
+ IWM_ERR(iwm, "Trying to send a frame to unknown STA\n");
+ kfree_skb(skb);
+ continue;
+ }
+
+ tid_info = &sta_info->tid_info[tx_info->tid];
+
+ mutex_lock(&tid_info->mutex);
+
+ /*
+ * If the RAxTID is stopped, we queue the skb to the stopped
+ * queue.
+ * Whenever we'll get a UMAC notification to resume the tx flow
+ * for this RAxTID, we'll merge back the stopped queue into the
+ * regular queue. See iwm_ntf_stop_resume_tx() from rx.c.
+ */
+ if (tid_info->stopped) {
+ IWM_DBG_TX(iwm, DBG, "%dx%d stopped\n",
+ tx_info->sta, tx_info->tid);
+ spin_lock_bh(&txq->lock);
+ skb_queue_tail(&txq->stopped_queue, skb);
+ spin_unlock_bh(&txq->lock);
+
+ mutex_unlock(&tid_info->mutex);
+ continue;
+ }
+
cmdlen = IWM_UDMA_HDR_LEN + skb->len;
IWM_DBG_TX(iwm, DBG, "Tx frame on queue %d: skb: 0x%p, sta: "
if (ret) {
IWM_DBG_TX(iwm, DBG, "not enough tx_credit for queue "
"%d, Tx worker stopped\n", txq->id);
+ spin_lock_bh(&txq->lock);
skb_queue_head(&txq->queue, skb);
+ spin_unlock_bh(&txq->lock);
+
+ mutex_unlock(&tid_info->mutex);
break;
}
txq->concat_ptr = txq->concat_buf + txq->concat_count;
- iwm_tx_build_packet(iwm, skb, pool_id, txq->concat_ptr);
+ tid_info->last_seq_num =
+ iwm_tx_build_packet(iwm, skb, pool_id, txq->concat_ptr);
txq->concat_count += ALIGN(cmdlen, 16);
+
+ mutex_unlock(&tid_info->mutex);
#endif
kfree_skb(skb);
}
struct iwm_priv *iwm = ndev_to_iwm(netdev);
struct net_device *ndev = iwm_to_ndev(iwm);
struct wireless_dev *wdev = iwm_to_wdev(iwm);
- u8 *dst_addr;
struct iwm_tx_info *tx_info;
struct iwm_tx_queue *txq;
struct iwm_sta_info *sta_info;
- u8 sta_id;
+ u8 *dst_addr, sta_id;
u16 queue;
int ret;
+
if (!test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
IWM_DBG_TX(iwm, DBG, "LINK: stop netif_all_queues: "
"not associated\n");
txq = &iwm->txq[queue];
/* No free space for Tx, tx_worker is too slow */
- if (skb_queue_len(&txq->queue) > IWM_TX_LIST_SIZE) {
+ if ((skb_queue_len(&txq->queue) > IWM_TX_LIST_SIZE) ||
+ (skb_queue_len(&txq->stopped_queue) > IWM_TX_LIST_SIZE)) {
IWM_DBG_TX(iwm, DBG, "LINK: stop netif_subqueue[%d]\n", queue);
netif_stop_subqueue(netdev, queue);
return NETDEV_TX_BUSY;
else
tx_info->tid = IWM_UMAC_MGMT_TID;
+ spin_lock_bh(&iwm->txq[queue].lock);
skb_queue_tail(&iwm->txq[queue].queue, skb);
+ spin_unlock_bh(&iwm->txq[queue].lock);
queue_work(iwm->txq[queue].wq, &iwm->txq[queue].worker);
((UMAC_HDI_ACT_TBL_IDX_RA_UMAC << UMAC_HDI_ACT_TBL_IDX_RA_POS) |\
(UMAC_HDI_ACT_TBL_IDX_TID_LMAC << UMAC_HDI_ACT_TBL_IDX_TID_POS))
+/* STA ID and color */
+#define STA_ID_SEED (0x0f)
+#define STA_ID_POS (0)
+#define STA_ID_MSK (STA_ID_SEED << STA_ID_POS)
+
+#define STA_COLOR_SEED (0x7)
+#define STA_COLOR_POS (4)
+#define STA_COLOR_MSK (STA_COLOR_SEED << STA_COLOR_POS)
+
+#define STA_ID_N_COLOR_COLOR(id_n_color) \
+ (((id_n_color) & STA_COLOR_MSK) >> STA_COLOR_POS)
+#define STA_ID_N_COLOR_ID(id_n_color) \
+ (((id_n_color) & STA_ID_MSK) >> STA_ID_POS)
+
/* iwm_umac_notif_alive.page_grp_state Group number -- bits [3:0] */
#define UMAC_ALIVE_PAGE_STS_GRP_NUM_POS 0
#define UMAC_ALIVE_PAGE_STS_GRP_NUM_SEED 0xF
#define UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST 0x16
#define UMAC_CMD_OPCODE_SET_PARAM_LIST 0x17
#define UMAC_CMD_OPCODE_GET_PARAM_LIST 0x18
+#define UMAC_CMD_OPCODE_STOP_RESUME_STA_TX 0x19
+#define UMAC_CMD_OPCODE_TEST_BLOCK_ACK 0x1A
+
#define UMAC_CMD_OPCODE_BASE_WRAPPER 0xFA
#define UMAC_CMD_OPCODE_LMAC_WRAPPER 0xFB
#define UMAC_CMD_OPCODE_HW_TEST_WRAPPER 0xFC
#define UMAC_PHY_NUM_CHAINS 3
#define IWM_UMAC_MGMT_TID 8
-#define IWM_UMAC_TID_NR 8
+#define IWM_UMAC_TID_NR 9 /* 8 TIDs + MGMT */
struct iwm_umac_notif_stats {
struct iwm_umac_wifi_in_hdr hdr;
__le32 flags;
__le32 timestamp;
- __le16 tid_load[IWM_UMAC_TID_NR + 2]; /* 1 non-QoS + 1 dword align */
+ __le16 tid_load[IWM_UMAC_TID_NR + 1]; /* 1 non-QoS + 1 dword align */
__le16 tx_rate[UMAC_NTF_RATE_SAMPLE_NR];
__le16 rx_rate[UMAC_NTF_RATE_SAMPLE_NR];
__le32 chain_energy[UMAC_PHY_NUM_CHAINS];
__le32 roam_ap_loadblance;
} __attribute__ ((packed));
+#define UMAC_STOP_TX_FLAG 0x1
+#define UMAC_RESUME_TX_FLAG 0x2
+
+#define LAST_SEQ_NUM_INVALID 0xFFFF
+
+struct iwm_umac_notif_stop_resume_tx {
+ struct iwm_umac_wifi_in_hdr hdr;
+ u8 flags; /* UMAC_*_TX_FLAG_* */
+ u8 sta_id;
+ __le16 stop_resume_tid_msk; /* tid bitmask */
+} __attribute__ ((packed));
+
+
/* WiFi interface wrapper header */
struct iwm_umac_wifi_if {
u8 oid;
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff