1 files changed, 68 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 7e5cf1a2b21e..5abe2e9ff0d2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -77,6 +77,74 @@ static const u8 ant_toggle_lookup[] = {
         /*ANT_ABC  -> */ ANT_ABC,
 };
 
+#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
+        [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
+                                    IWL_RATE_SISO_##s##M_PLCP, \
+                                    IWL_RATE_MIMO2_##s##M_PLCP,\
+                                    IWL_RATE_MIMO3_##s##M_PLCP,\
+                                    IWL_RATE_##r##M_IEEE,      \
+                                    IWL_RATE_##ip##M_INDEX,    \
+                                    IWL_RATE_##in##M_INDEX,    \
+                                    IWL_RATE_##rp##M_INDEX,    \
+                                    IWL_RATE_##rn##M_INDEX,    \
+                                    IWL_RATE_##pp##M_INDEX,    \
+                                    IWL_RATE_##np##M_INDEX }
+
+/*
+ * Parameter order:
+ *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
+ *
+ * If there isn't a valid next or previous rate then INV is used which
+ * maps to IWL_RATE_INVALID
+ *
+ */
+const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
+        IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
+        IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
+        IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
+        IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
+        IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
+        IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
+        IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
+        IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
+        IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
+        IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
+        IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
+        IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
+        IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
+        /* FIXME:RS:          ^^    should be INV (legacy) */
+};
+
+static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
+{
+        int idx = 0;
+
+        /* HT rate format */
+        if (rate_n_flags & RATE_MCS_HT_MSK) {
+                idx = (rate_n_flags & 0xff);
+
+                if (idx >= IWL_RATE_MIMO3_6M_PLCP)
+                        idx = idx - IWL_RATE_MIMO3_6M_PLCP;
+                else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
+                        idx = idx - IWL_RATE_MIMO2_6M_PLCP;
+
+                idx += IWL_FIRST_OFDM_RATE;
+                /* skip 9M not supported in ht*/
+                if (idx >= IWL_RATE_9M_INDEX)
+                        idx += 1;
+                if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
+                        return idx;
+
+        /* legacy rate format, search for match in table */
+        } else {
+                for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
+                        if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
+                                return idx;
+        }
+
+        return -1;
+}
+
 static void rs_rate_scale_perform(struct iwl_priv *priv,
                                    struct sk_buff *skb,
                                    struct ieee80211_sta *sta,