ath9k_hw: Fill descriptor abstrations for AR9003

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 254 insertions, 7 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
index cb93d2375e8d..1a8c1ba538b4 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -168,23 +168,169 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
         return true;
 }
 
+static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
+{
+        int checksum;
+
+        checksum = ads->info + ads->link
+                + ads->data0 + ads->ctl3
+                + ads->data1 + ads->ctl5
+                + ads->data2 + ads->ctl7
+                + ads->data3 + ads->ctl9;
+
+        return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
+}
+
 static void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,
                                   bool is_firstseg, bool is_lastseg,
                                   const void *ds0, dma_addr_t buf_addr,
                                   unsigned int qcu)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+        unsigned int descid = 0;
+
+        ads->info = (ATHEROS_VENDOR_ID << AR_DescId_S) |
+                                     (1 << AR_TxRxDesc_S) |
+                                     (1 << AR_CtrlStat_S) |
+                                     (qcu << AR_TxQcuNum_S) | 0x17;
+
+        ads->data0 = buf_addr;
+        ads->data1 = 0;
+        ads->data2 = 0;
+        ads->data3 = 0;
+
+        ads->ctl3 = (seglen << AR_BufLen_S);
+        ads->ctl3 &= AR_BufLen;
+
+        /* Fill in pointer checksum and descriptor id */
+        ads->ctl10 = ar9003_calc_ptr_chksum(ads);
+        ads->ctl10 |= (descid << AR_TxDescId_S);
+
+        if (is_firstseg) {
+                ads->ctl12 |= (is_lastseg ? 0 : AR_TxMore);
+        } else if (is_lastseg) {
+                ads->ctl11 = 0;
+                ads->ctl12 = 0;
+                ads->ctl13 = AR9003TXC_CONST(ds0)->ctl13;
+                ads->ctl14 = AR9003TXC_CONST(ds0)->ctl14;
+        } else {
+                /* XXX Intermediate descriptor in a multi-descriptor frame.*/
+                ads->ctl11 = 0;
+                ads->ctl12 = AR_TxMore;
+                ads->ctl13 = 0;
+                ads->ctl14 = 0;
+        }
 }
 
 static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
                                  struct ath_tx_status *ts)
 {
+        struct ar9003_txs *ads;
+
+        ads = &ah->ts_ring[ah->ts_tail];
+
+        if ((ads->status8 & AR_TxDone) == 0)
+                return -EINPROGRESS;
+
+        ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
+
+        if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
+            (MS(ads->ds_info, AR_TxRxDesc) != 1)) {
+                ath_print(ath9k_hw_common(ah), ATH_DBG_XMIT,
+                          "Tx Descriptor error %x\n", ads->ds_info);
+                memset(ads, 0, sizeof(*ads));
+                return -EIO;
+        }
+
+        ts->qid = MS(ads->ds_info, AR_TxQcuNum);
+        ts->desc_id = MS(ads->status1, AR_TxDescId);
+        ts->ts_seqnum = MS(ads->status8, AR_SeqNum);
+        ts->ts_tstamp = ads->status4;
+        ts->ts_status = 0;
+        ts->ts_flags  = 0;
+
+        if (ads->status3 & AR_ExcessiveRetries)
+                ts->ts_status |= ATH9K_TXERR_XRETRY;
+        if (ads->status3 & AR_Filtered)
+                ts->ts_status |= ATH9K_TXERR_FILT;
+        if (ads->status3 & AR_FIFOUnderrun) {
+                ts->ts_status |= ATH9K_TXERR_FIFO;
+                ath9k_hw_updatetxtriglevel(ah, true);
+        }
+        if (ads->status8 & AR_TxOpExceeded)
+                ts->ts_status |= ATH9K_TXERR_XTXOP;
+        if (ads->status3 & AR_TxTimerExpired)
+                ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
+
+        if (ads->status3 & AR_DescCfgErr)
+                ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
+        if (ads->status3 & AR_TxDataUnderrun) {
+                ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
+                ath9k_hw_updatetxtriglevel(ah, true);
+        }
+        if (ads->status3 & AR_TxDelimUnderrun) {
+                ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
+                ath9k_hw_updatetxtriglevel(ah, true);
+        }
+        if (ads->status2 & AR_TxBaStatus) {
+                ts->ts_flags |= ATH9K_TX_BA;
+                ts->ba_low = ads->status5;
+                ts->ba_high = ads->status6;
+        }
+
+        ts->ts_rateindex = MS(ads->status8, AR_FinalTxIdx);
+
+        ts->ts_rssi = MS(ads->status7, AR_TxRSSICombined);
+        ts->ts_rssi_ctl0 = MS(ads->status2, AR_TxRSSIAnt00);
+        ts->ts_rssi_ctl1 = MS(ads->status2, AR_TxRSSIAnt01);
+        ts->ts_rssi_ctl2 = MS(ads->status2, AR_TxRSSIAnt02);
+        ts->ts_rssi_ext0 = MS(ads->status7, AR_TxRSSIAnt10);
+        ts->ts_rssi_ext1 = MS(ads->status7, AR_TxRSSIAnt11);
+        ts->ts_rssi_ext2 = MS(ads->status7, AR_TxRSSIAnt12);
+        ts->ts_shortretry = MS(ads->status3, AR_RTSFailCnt);
+        ts->ts_longretry = MS(ads->status3, AR_DataFailCnt);
+        ts->ts_virtcol = MS(ads->status3, AR_VirtRetryCnt);
+        ts->ts_antenna = 0;
+
+        ts->tid = MS(ads->status8, AR_TxTid);
+
+        memset(ads, 0, sizeof(*ads));
+
         return 0;
 }
+
 static void ar9003_hw_set11n_txdesc(struct ath_hw *ah, void *ds,
-                            u32 pktLen, enum ath9k_pkt_type type, u32 txPower,
-                            u32 keyIx, enum ath9k_key_type keyType, u32 flags)
+                u32 pktlen, enum ath9k_pkt_type type, u32 txpower,
+                u32 keyIx, enum ath9k_key_type keyType, u32 flags)
 {
-
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+
+        txpower += ah->txpower_indexoffset;
+        if (txpower > 63)
+                txpower = 63;
+
+        ads->ctl11 = (pktlen & AR_FrameLen)
+                | (flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
+                | SM(txpower, AR_XmitPower)
+                | (flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
+                | (flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
+                | (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
+                | (flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0);
+
+        ads->ctl12 =
+                (keyIx != ATH9K_TXKEYIX_INVALID ? SM(keyIx, AR_DestIdx) : 0)
+                | SM(type, AR_FrameType)
+                | (flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
+                | (flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
+                | (flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
+
+        ads->ctl17 = SM(keyType, AR_EncrType);
+        ads->ctl18 = 0;
+        ads->ctl19 = AR_Not_Sounding;
+
+        ads->ctl20 = 0;
+        ads->ctl21 = 0;
+        ads->ctl22 = 0;
 }
 
 static void ar9003_hw_set11n_ratescenario(struct ath_hw *ah, void *ds,
@@ -194,41 +340,119 @@ static void ar9003_hw_set11n_ratescenario(struct ath_hw *ah, void *ds,
                                           struct ath9k_11n_rate_series series[],
                                           u32 nseries, u32 flags)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+        struct ar9003_txc *last_ads = (struct ar9003_txc *) lastds;
+        u_int32_t ctl11;
+
+        if (flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)) {
+                ctl11 = ads->ctl11;
+
+                if (flags & ATH9K_TXDESC_RTSENA) {
+                        ctl11 &= ~AR_CTSEnable;
+                        ctl11 |= AR_RTSEnable;
+                } else {
+                        ctl11 &= ~AR_RTSEnable;
+                        ctl11 |= AR_CTSEnable;
+                }
+
+                ads->ctl11 = ctl11;
+        } else {
+                ads->ctl11 = (ads->ctl11 & ~(AR_RTSEnable | AR_CTSEnable));
+        }
 
+        ads->ctl13 = set11nTries(series, 0)
+                |  set11nTries(series, 1)
+                |  set11nTries(series, 2)
+                |  set11nTries(series, 3)
+                |  (durUpdateEn ? AR_DurUpdateEna : 0)
+                |  SM(0, AR_BurstDur);
+
+        ads->ctl14 = set11nRate(series, 0)
+                |  set11nRate(series, 1)
+                |  set11nRate(series, 2)
+                |  set11nRate(series, 3);
+
+        ads->ctl15 = set11nPktDurRTSCTS(series, 0)
+                |  set11nPktDurRTSCTS(series, 1);
+
+        ads->ctl16 = set11nPktDurRTSCTS(series, 2)
+                |  set11nPktDurRTSCTS(series, 3);
+
+        ads->ctl18 = set11nRateFlags(series, 0)
+                |  set11nRateFlags(series, 1)
+                |  set11nRateFlags(series, 2)
+                |  set11nRateFlags(series, 3)
+                | SM(rtsctsRate, AR_RTSCTSRate);
+        ads->ctl19 = AR_Not_Sounding;
+
+        last_ads->ctl13 = ads->ctl13;
+        last_ads->ctl14 = ads->ctl14;
 }
 
 static void ar9003_hw_set11n_aggr_first(struct ath_hw *ah, void *ds,
                                         u32 aggrLen)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+
+        ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
 
+        ads->ctl17 &= ~AR_AggrLen;
+        ads->ctl17 |= SM(aggrLen, AR_AggrLen);
 }
 
 static void ar9003_hw_set11n_aggr_middle(struct ath_hw *ah, void *ds,
                                          u32 numDelims)
 {
-
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+        unsigned int ctl17;
+
+        ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
+
+        /*
+         * We use a stack variable to manipulate ctl6 to reduce uncached
+         * read modify, modfiy, write.
+         */
+        ctl17 = ads->ctl17;
+        ctl17 &= ~AR_PadDelim;
+        ctl17 |= SM(numDelims, AR_PadDelim);
+        ads->ctl17 = ctl17;
 }
 
 static void ar9003_hw_set11n_aggr_last(struct ath_hw *ah, void *ds)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 
+        ads->ctl12 |= AR_IsAggr;
+        ads->ctl12 &= ~AR_MoreAggr;
+        ads->ctl17 &= ~AR_PadDelim;
 }
 
 static void ar9003_hw_clr11n_aggr(struct ath_hw *ah, void *ds)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 
+        ads->ctl12 &= (~AR_IsAggr & ~AR_MoreAggr);
 }
 
 static void ar9003_hw_set11n_burstduration(struct ath_hw *ah, void *ds,
                                            u32 burstDuration)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
+
+        ads->ctl13 &= ~AR_BurstDur;
+        ads->ctl13 |= SM(burstDuration, AR_BurstDur);
 
 }
 
 static void ar9003_hw_set11n_virtualmorefrag(struct ath_hw *ah, void *ds,
-                                            u32 vmf)
+                                             u32 vmf)
 {
+        struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 
+        if (vmf)
+                ads->ctl11 |=  AR_VirtMoreFrag;
+        else
+                ads->ctl11 &= ~AR_VirtMoreFrag;
 }
 
 void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.h b/drivers/net/wireless/ath/ath9k/ar9003_mac.h
index ef7999636ea0..f17558b14539 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.h
@@ -20,7 +20,25 @@
 #define AR_DescId       0xffff0000
 #define AR_DescId_S     16
 #define AR_CtrlStat     0x00004000
+#define AR_CtrlStat_S   14
 #define AR_TxRxDesc     0x00008000
+#define AR_TxRxDesc_S   15
+#define AR_TxQcuNum     0x00000f00
+#define AR_TxQcuNum_S   8
+
+#define AR_BufLen       0x0fff0000
+#define AR_BufLen_S     16
+
+#define AR_TxDescId     0xffff0000
+#define AR_TxDescId_S   16
+#define AR_TxPtrChkSum  0x0000ffff
+
+#define AR_TxTid        0xf0000000
+#define AR_TxTid_S      28
+
+#define AR_LowRxChain   0x00004000
+
+#define AR_Not_Sounding 0x20000000
 
 #define MAP_ISR_S2_CST          6
 #define MAP_ISR_S2_GTT          6
@@ -30,6 +48,8 @@
 #define MAP_ISR_S2_DTIM         7
 #define MAP_ISR_S2_TSFOOR       4
 
+#define AR9003TXC_CONST(_ds) ((const struct ar9003_txc *) _ds)
+
 struct ar9003_rxs {
         u32 ds_info;
         u32 status1;
diff --git a/drivers/net/wireless/ath/ath9k/mac.h b/drivers/net/wireless/ath/ath9k/mac.h
index eb430c471c5c..b591dc27c325 100644
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -116,7 +116,10 @@ struct ath_tx_status {
         int8_t ts_rssi_ext0;
         int8_t ts_rssi_ext1;
         int8_t ts_rssi_ext2;
-        u8 pad[3];
+        u8 qid;
+        u16 desc_id;
+        u8 tid;
+        u8 pad[2];
         u32 ba_low;
         u32 ba_high;
         u32 evm0;
@@ -260,7 +263,7 @@ struct ath_desc {
 #define ATH9K_TXDESC_EXT_AND_CTL        0x0080
 #define ATH9K_TXDESC_VMF                0x0100
 #define ATH9K_TXDESC_FRAG_IS_ON         0x0200
-#define ATH9K_TXDESC_CAB                0x0400
+#define ATH9K_TXDESC_LOWRXCHAIN         0x0400
 
 #define ATH9K_RXDESC_INTREQ             0x0020