#define _IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE #api ".ucode"
#define IWL5150_MODULE_FIRMWARE(api) _IWL5150_MODULE_FIRMWARE(api)
-static const u16 iwl5000_default_queue_to_tx_fifo[] = {
- IWL_TX_FIFO_AC3,
- IWL_TX_FIFO_AC2,
- IWL_TX_FIFO_AC1,
- IWL_TX_FIFO_AC0,
+static const s8 iwl5000_default_queue_to_tx_fifo[] = {
+ IWL_TX_FIFO_VO,
+ IWL_TX_FIFO_VI,
+ IWL_TX_FIFO_BE,
+ IWL_TX_FIFO_BK,
IWL50_CMD_FIFO_NUM,
- IWL_TX_FIFO_HCCA_1,
- IWL_TX_FIFO_HCCA_2
+ IWL_TX_FIFO_UNUSED,
+ IWL_TX_FIFO_UNUSED,
+ IWL_TX_FIFO_UNUSED,
+ IWL_TX_FIFO_UNUSED,
+ IWL_TX_FIFO_UNUSED,
};
/* NIC configuration for 5000 series */
/* reset to 0 to enable all the queue first */
priv->txq_ctx_active_msk = 0;
/* map qos queues to fifos one-to-one */
+ BUILD_BUG_ON(ARRAY_SIZE(iwl5000_default_queue_to_tx_fifo) != 10);
+
for (i = 0; i < ARRAY_SIZE(iwl5000_default_queue_to_tx_fifo); i++) {
int ac = iwl5000_default_queue_to_tx_fifo[i];
+
iwl_txq_ctx_activate(priv, i);
+
+ if (ac == IWL_TX_FIFO_UNUSED)
+ continue;
+
iwl5000_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
}
- /*
- * TODO - need to initialize these queues and map them to FIFOs
- * in the loop above, not only mark them as active. We do this
- * because we want the first aggregation queue to be queue #10,
- * but do not use 8 or 9 otherwise yet.
- */
- iwl_txq_ctx_activate(priv, 7);
- iwl_txq_ctx_activate(priv, 8);
- iwl_txq_ctx_activate(priv, 9);
-
spin_unlock_irqrestore(&priv->lock, flags);
-
iwl_send_wimax_coex(priv);
iwl5000_set_Xtal_calib(priv);
* device. A queue maps to only one (selectable by driver) Tx DMA channel,
* but one DMA channel may take input from several queues.
*
- * Tx DMA channels have dedicated purposes. For 4965, they are used as follows
+ * Tx DMA FIFOs have dedicated purposes. For 4965, they are used as follows
* (cf. default_queue_to_tx_fifo in iwl-4965.c):
*
* 0 -- EDCA BK (background) frames, lowest priority
* 2 -- EDCA VI (video) frames, higher priority
* 3 -- EDCA VO (voice) and management frames, highest priority
* 4 -- Commands (e.g. RXON, etc.)
- * 5 -- HCCA short frames
- * 6 -- HCCA long frames
+ * 5 -- unused (HCCA)
+ * 6 -- unused (HCCA)
* 7 -- not used by driver (device-internal only)
*
- * For 5000 series and up, they are used slightly differently
+ * For 5000 series and up, they are used differently
* (cf. iwl5000_default_queue_to_tx_fifo in iwl-5000.c):
*
* 0 -- EDCA BK (background) frames, lowest priority
* 1 -- EDCA BE (best effort) frames, normal priority
* 2 -- EDCA VI (video) frames, higher priority
* 3 -- EDCA VO (voice) and management frames, highest priority
- * 4 -- (TBD)
- * 5 -- HCCA short frames
- * 6 -- HCCA long frames
+ * 4 -- unused
+ * 5 -- unused
+ * 6 -- unused
* 7 -- Commands
*
* Driver should normally map queues 0-6 to Tx DMA/FIFO channels 0-6.
#include "iwl-io.h"
#include "iwl-helpers.h"
-static const u16 default_tid_to_tx_fifo[] = {
- IWL_TX_FIFO_AC1,
- IWL_TX_FIFO_AC0,
- IWL_TX_FIFO_AC0,
- IWL_TX_FIFO_AC1,
- IWL_TX_FIFO_AC2,
- IWL_TX_FIFO_AC2,
- IWL_TX_FIFO_AC3,
- IWL_TX_FIFO_AC3,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_NONE,
- IWL_TX_FIFO_AC3
+/*
+ * 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, iwl-5000.c etc.), the AC->hw queue mapping is the identity
+ * mapping.
+ */
+
+static const u8 tid_to_ac[] = {
+ /* this matches the mac80211 numbers */
+ 2, 3, 3, 2, 1, 1, 0, 0
+};
+
+static const u8 ac_to_fifo[] = {
+ IWL_TX_FIFO_VO,
+ IWL_TX_FIFO_VI,
+ IWL_TX_FIFO_BE,
+ IWL_TX_FIFO_BK,
};
+static inline int get_fifo_from_ac(u8 ac)
+{
+ return ac_to_fifo[ac];
+}
+
+static inline int get_queue_from_ac(u16 ac)
+{
+ return ac;
+}
+
+static inline int get_fifo_from_tid(u16 tid)
+{
+ if (likely(tid < ARRAY_SIZE(tid_to_ac)))
+ return get_fifo_from_ac(tid_to_ac[tid]);
+
+ /* no support for TIDs 8-15 yet */
+ return -EINVAL;
+}
+
static inline int iwl_alloc_dma_ptr(struct iwl_priv *priv,
struct iwl_dma_ptr *ptr, size_t size)
{
tx_cmd->next_frame_len = 0;
}
-#define RTS_HCCA_RETRY_LIMIT 3
#define RTS_DFAULT_RETRY_LIMIT 60
static void iwl_tx_cmd_build_rate(struct iwl_priv *priv,
struct iwl_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
- __le16 fc, int is_hcca)
+ __le16 fc)
{
u32 rate_flags;
int rate_idx;
tx_cmd->data_retry_limit = data_retry_limit;
/* Set retry limit on RTS packets */
- rts_retry_limit = (is_hcca) ? RTS_HCCA_RETRY_LIMIT :
- RTS_DFAULT_RETRY_LIMIT;
+ 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;
iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
}
- txq_id = skb_get_queue_mapping(skb);
+ txq_id = get_queue_from_ac(skb_get_queue_mapping(skb));
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
iwl_tx_cmd_build_basic(priv, tx_cmd, info, hdr, sta_id);
iwl_dbg_log_tx_data_frame(priv, len, hdr);
- /* set is_hcca to 0; it probably will never be implemented */
- iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc, 0);
+ iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc);
iwl_update_stats(priv, true, fc, len);
/*
* 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), HCCA (5, 6).
+ * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
*/
static int iwl_txq_ctx_activate_free(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_tid_data *tid_data;
- if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
- tx_fifo = default_tid_to_tx_fifo[tid];
- else
- return -EINVAL;
+ tx_fifo = get_fifo_from_tid(tid);
+ if (unlikely(tx_fifo < 0))
+ return tx_fifo;
IWL_WARN(priv, "%s on ra = %pM tid = %d\n",
__func__, ra, tid);
return -EINVAL;
}
- if (unlikely(tid >= MAX_TID_COUNT))
- return -EINVAL;
-
- if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
- tx_fifo_id = default_tid_to_tx_fifo[tid];
- else
- return -EINVAL;
+ tx_fifo_id = get_fifo_from_tid(tid);
+ if (unlikely(tx_fifo_id < 0))
+ return tx_fifo_id;
sta_id = iwl_find_station(priv, ra);
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 = default_tid_to_tx_fifo[tid];
+ int tx_fifo = get_fifo_from_tid(tid);
IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n");
priv->cfg->ops->lib->txq_agg_disable(priv, txq_id,
ssn, tx_fifo);
projects / linux-beck.git / commitdiff