iwlwifi: configurable ampdu factor and density

Add ampdu factor and density to .cfg, this allow both parameters
can be configure per device based.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -239,7 +239,11 @@ static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 
 	ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
+	if (priv->cfg->ampdu_factor)
+		ht_info->ampdu_factor = priv->cfg->ampdu_factor;
 	ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
+	if (priv->cfg->ampdu_density)
+		ht_info->ampdu_density = priv->cfg->ampdu_density;
 
 	ht_info->mcs.rx_mask[0] = 0xFF;
 	if (rx_chains_num >= 2)

drivers/net/wireless/iwlwifi/iwl-core.h

@@ -281,6 +281,8 @@ struct iwl_mod_params {
  * @need_dc_calib: need to perform init dc calibration
  * @bt_statistics: use BT version of statistics notification
  * @agg_time_limit: maximum number of uSec in aggregation
+ * @ampdu_factor: Maximum A-MPDU length factor
+ * @ampdu_density: Minimum A-MPDU spacing
  *
  * We enable the driver to be backward compatible wrt API version. The
  * driver specifies which APIs it supports (with @ucode_api_max being the
@@ -352,6 +354,8 @@ struct iwl_cfg {
 	const bool need_dc_calib;
 	const bool bt_statistics;
 	u16 agg_time_limit;
+	u8 ampdu_factor;
+	u8 ampdu_density;
 };
 
 /***************************

drivers/net/wireless/iwlwifi/iwl-dev.h

@@ -435,7 +435,13 @@ union iwl_ht_rate_supp {
 	};
 };
 
-#define CFG_HT_RX_AMPDU_FACTOR_DEF  (0x3)
+#define CFG_HT_RX_AMPDU_FACTOR_8K   (0x0)
+#define CFG_HT_RX_AMPDU_FACTOR_16K  (0x1)
+#define CFG_HT_RX_AMPDU_FACTOR_32K  (0x2)
+#define CFG_HT_RX_AMPDU_FACTOR_64K  (0x3)
+#define CFG_HT_RX_AMPDU_FACTOR_DEF  CFG_HT_RX_AMPDU_FACTOR_64K
+#define CFG_HT_RX_AMPDU_FACTOR_MAX  CFG_HT_RX_AMPDU_FACTOR_64K
+#define CFG_HT_RX_AMPDU_FACTOR_MIN  CFG_HT_RX_AMPDU_FACTOR_8K
 
 /*
  * Maximal MPDU density for TX aggregation
@@ -444,8 +450,13 @@ union iwl_ht_rate_supp {
  * 6 - 8us density
  * 7 - 16us density
  */
+#define CFG_HT_MPDU_DENSITY_2USEC   (0x4)
 #define CFG_HT_MPDU_DENSITY_4USEC   (0x5)
+#define CFG_HT_MPDU_DENSITY_8USEC   (0x6)
+#define CFG_HT_MPDU_DENSITY_16USEC  (0x7)
 #define CFG_HT_MPDU_DENSITY_DEF CFG_HT_MPDU_DENSITY_4USEC
+#define CFG_HT_MPDU_DENSITY_MAX CFG_HT_MPDU_DENSITY_16USEC
+#define CFG_HT_MPDU_DENSITY_MIN     (0x1)
 
 struct iwl_ht_config {
 	/* self configuration data */