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-rw-r--r--drivers/net/wireless/iwlwifi/iwl-tx.c111
1 files changed, 62 insertions, 49 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 7bc9c0039f7..a7422e52d88 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -566,62 +566,81 @@ static void iwl_tx_cmd_build_basic(struct iwl_priv *priv,
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 sta_id,
- int is_hcca)
+ __le16 fc, int is_hcca)
{
- u32 rate_flags = 0;
+ u32 rate_flags;
int rate_idx;
- u8 rts_retry_limit = 0;
- u8 data_retry_limit = 0;
+ u8 rts_retry_limit;
+ u8 data_retry_limit;
u8 rate_plcp;
- rate_idx = min(ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xffff,
- IWL_RATE_COUNT - 1);
-
- rate_plcp = iwl_rates[rate_idx].plcp;
-
- rts_retry_limit = (is_hcca) ?
- RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
-
- if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
- rate_flags |= RATE_MCS_CCK_MSK;
-
-
- if (ieee80211_is_probe_resp(fc)) {
- data_retry_limit = 3;
- if (data_retry_limit < rts_retry_limit)
- rts_retry_limit = data_retry_limit;
- } else
- data_retry_limit = IWL_DEFAULT_TX_RETRY;
-
+ /* Set retry limit on DATA packets and Probe Responses*/
if (priv->data_retry_limit != -1)
data_retry_limit = priv->data_retry_limit;
+ else if (ieee80211_is_probe_resp(fc))
+ data_retry_limit = 3;
+ else
+ data_retry_limit = IWL_DEFAULT_TX_RETRY;
+ 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;
+ 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_index = 0;
tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
- } else {
- switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
- case cpu_to_le16(IEEE80211_STYPE_AUTH):
- case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
- case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
- case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
- if (tx_cmd->tx_flags & TX_CMD_FLG_RTS_MSK) {
- tx_cmd->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
- tx_cmd->tx_flags |= TX_CMD_FLG_CTS_MSK;
- }
- break;
- default:
- break;
- }
+ 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
+ * index is invalid.
+ */
+ rate_idx = info->control.rates[0].idx;
+ if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
+ (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
+ rate_idx = rate_lowest_index(&priv->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 += IWL_FIRST_OFDM_RATE;
+ /* Get PLCP rate for tx_cmd->rate_n_flags */
+ rate_plcp = iwl_rates[rate_idx].plcp;
+ /* Zero out flags for this packet */
+ rate_flags = 0;
- priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
- rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
+ /* Set CCK flag as needed */
+ if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
+ rate_flags |= RATE_MCS_CCK_MSK;
+
+ /* Set up RTS and CTS flags for certain packets */
+ switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
+ case cpu_to_le16(IEEE80211_STYPE_AUTH):
+ case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
+ case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
+ case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
+ if (tx_cmd->tx_flags & TX_CMD_FLG_RTS_MSK) {
+ tx_cmd->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
+ tx_cmd->tx_flags |= TX_CMD_FLG_CTS_MSK;
+ }
+ break;
+ default:
+ break;
}
- tx_cmd->rts_retry_limit = rts_retry_limit;
- tx_cmd->data_retry_limit = data_retry_limit;
+ /* Set up antennas */
+ priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
+ rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
+
+ /* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
}
@@ -701,12 +720,6 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
goto drop_unlock;
}
- if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) ==
- IWL_INVALID_RATE) {
- IWL_ERR(priv, "ERROR: No TX rate available.\n");
- goto drop_unlock;
- }
-
fc = hdr->frame_control;
#ifdef CONFIG_IWLWIFI_DEBUG
@@ -807,7 +820,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
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, sta_id, 0);
+ iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc, 0);
iwl_update_stats(priv, true, fc, len);
/*