ath9k_hw: Add function to configure tx status ring buffer

Also reset tx status ring suring chip reset.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 59 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
index c270bbe25168..81ad09a7ddff 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -347,3 +347,33 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
         return 0;
 }
 EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
+
+void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
+{
+        ah->ts_tail = 0;
+
+        memset((void *) ah->ts_ring, 0,
+                ah->ts_size * sizeof(struct ar9003_txs));
+
+        ath_print(ath9k_hw_common(ah), ATH_DBG_XMIT,
+                  "TS Start 0x%x End 0x%x Virt %p, Size %d\n",
+                   ah->ts_paddr_start, ah->ts_paddr_end,
+                   ah->ts_ring, ah->ts_size);
+
+        REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
+        REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
+}
+
+void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
+                               u32 ts_paddr_start,
+                               u8 size)
+{
+
+        ah->ts_paddr_start = ts_paddr_start;
+        ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
+        ah->ts_size = size;
+        ah->ts_ring = (struct ar9003_txs *) ts_start;
+
+        ath9k_hw_reset_txstatus_ring(ah);
+}
+EXPORT_SYMBOL(ath9k_hw_setup_statusring);
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.h b/drivers/net/wireless/ath/ath9k/ar9003_mac.h
index 2ba06d7674e8..ef7999636ea0 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.h
@@ -73,6 +73,18 @@ struct ar9003_txc {
         u32 pad[9]; /* pad to cache line (128 bytes/32 dwords) */
 } __packed;
 
+struct ar9003_txs {
+        u32 ds_info;
+        u32 status1;
+        u32 status2;
+        u32 status3;
+        u32 status4;
+        u32 status5;
+        u32 status6;
+        u32 status7;
+        u32 status8;
+} __packed;
+
 void ar9003_hw_attach_mac_ops(struct ath_hw *hw);
 void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size);
 void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
@@ -81,5 +93,8 @@ void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
 int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah,
                                  struct ath_rx_status *rxs,
                                  void *buf_addr);
-
+void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah);
+void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
+                               u32 ts_paddr_start,
+                               u8 size);
 #endif
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 824dd9e72564..19e2c3cd1473 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -895,6 +895,9 @@ static inline void ath9k_hw_set_dma(struct ath_hw *ah)
                 REG_WRITE(ah, AR_PCU_TXBUF_CTRL,
                           AR_PCU_TXBUF_CTRL_USABLE_SIZE);
         }
+
+        if (AR_SREV_9300_20_OR_LATER(ah))
+                ath9k_hw_reset_txstatus_ring(ah);
 }
 
 static void ath9k_hw_set_operating_mode(struct ath_hw *ah, int opmode)
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 457d8ddebf83..6dbbab95df59 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -761,6 +761,13 @@ struct ath_hw {
         u32 intr_gen_timer_trigger;
         u32 intr_gen_timer_thresh;
         struct ath_gen_timer_table hw_gen_timers;
+
+        struct ar9003_txs *ts_ring;
+        void *ts_start;
+        u32 ts_paddr_start;
+        u32 ts_paddr_end;
+        u16 ts_tail;
+        u8 ts_size;
 };
 
 static inline struct ath_common *ath9k_hw_common(struct ath_hw *ah)
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 2ca478c802c4..ff8914049c53 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -383,6 +383,9 @@
 #define AR_Q9_TXDP           0x0824
 #define AR_QTXDP(_i)    (AR_Q0_TXDP + ((_i)<<2))
 
+#define AR_Q_STATUS_RING_START  0x830
+#define AR_Q_STATUS_RING_END    0x834
+
 #define AR_Q_TXE             0x0840
 #define AR_Q_TXE_M           0x000003FF