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iwlwifi: use iwl_hwrate_get_mac80211_idx where appropriate

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For HT packets, mac80211 expects the rate_idx to be an MCS number, which is the
lower byte of rate_n_flags.  However, iwl_hwrate_to_plcp_idx takes the MCS
number and reduces it down to the range 0-8 (6 to 60 Mbps), removing the bits
that signify multiply streams, HT40 Duplicate mode, or unequal modulation.
This version is used for various internal purposes through the driver.

Add the function iwl_hwrate_get_mac80211_idx, an alternate version which takes
the rate and the band and returns the mac80211 index (MCS, for HT packets, and
PLCP rate, for legacy packets).

Signed-off-by: Daniel C Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel C Halperin
2009-08-28 09:44:47 -07:00
committed by John W. Linville
parent b58ef214b7
commit 31513be8a0
4 changed files with 35 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/wireless/iwlwifi/iwl-core.c
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@@ -96,7 +96,6 @@ EXPORT_SYMBOL(iwl_rates);
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
int rate_index;
struct ieee80211_tx_rate *r = &info->control.rates[0];
info->antenna_sel_tx =
@@ -111,10 +110,7 @@ void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
r->flags |= IEEE80211_TX_RC_DUP_DATA;
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
if (info->band == IEEE80211_BAND_5GHZ)
rate_index -= IWL_FIRST_OFDM_RATE;
r->idx = rate_index;
r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
@@ -149,6 +145,27 @@ int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
int idx = 0;
int band_offset = 0;
/* HT rate format: mac80211 wants an MCS number, which is just LSB */
if (rate_n_flags & RATE_MCS_HT_MSK) {
idx = (rate_n_flags & 0xff);
return idx;
/* Legacy rate format, search for match in table */
} else {
if (band == IEEE80211_BAND_5GHZ)
band_offset = IWL_FIRST_OFDM_RATE;
for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
return idx - band_offset;
}
return -1;
}
u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
int i;