rt2x00: Factor out RXWI processing to common rt2800 code.

RXWI processing is exactly the same for rt2800pci and rt2800usb, so
make it common code.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 79 insertions, 97 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 28d82ce05527..7410ac1acaff 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -335,6 +335,50 @@ void rt2800_write_txwi(struct sk_buff *skb, struct txentry_desc *txdesc)
 }
 EXPORT_SYMBOL_GPL(rt2800_write_txwi);
 
+void rt2800_process_rxwi(struct sk_buff *skb, struct rxdone_entry_desc *rxdesc)
+{
+        __le32 *rxwi = (__le32 *) skb->data;
+        u32 word;
+
+        rt2x00_desc_read(rxwi, 0, &word);
+
+        rxdesc->cipher = rt2x00_get_field32(word, RXWI_W0_UDF);
+        rxdesc->size = rt2x00_get_field32(word, RXWI_W0_MPDU_TOTAL_BYTE_COUNT);
+
+        rt2x00_desc_read(rxwi, 1, &word);
+
+        if (rt2x00_get_field32(word, RXWI_W1_SHORT_GI))
+                rxdesc->flags |= RX_FLAG_SHORT_GI;
+
+        if (rt2x00_get_field32(word, RXWI_W1_BW))
+                rxdesc->flags |= RX_FLAG_40MHZ;
+
+        /*
+         * Detect RX rate, always use MCS as signal type.
+         */
+        rxdesc->dev_flags |= RXDONE_SIGNAL_MCS;
+        rxdesc->signal = rt2x00_get_field32(word, RXWI_W1_MCS);
+        rxdesc->rate_mode = rt2x00_get_field32(word, RXWI_W1_PHYMODE);
+
+        /*
+         * Mask of 0x8 bit to remove the short preamble flag.
+         */
+        if (rxdesc->rate_mode == RATE_MODE_CCK)
+                rxdesc->signal &= ~0x8;
+
+        rt2x00_desc_read(rxwi, 2, &word);
+
+        rxdesc->rssi =
+            (rt2x00_get_field32(word, RXWI_W2_RSSI0) +
+             rt2x00_get_field32(word, RXWI_W2_RSSI1)) / 2;
+
+        /*
+         * Remove RXWI descriptor from start of buffer.
+         */
+        skb_pull(skb, RXWI_DESC_SIZE);
+}
+EXPORT_SYMBOL_GPL(rt2800_process_rxwi);
+
 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 const struct rt2x00debug rt2800_rt2x00debug = {
         .owner  = THIS_MODULE,
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.h b/drivers/net/wireless/rt2x00/rt2800lib.h
index b805310e126c..94de999e2290 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.h
+++ b/drivers/net/wireless/rt2x00/rt2800lib.h
@@ -112,6 +112,7 @@ void rt2800_mcu_request(struct rt2x00_dev *rt2x00dev,
                         const u8 arg0, const u8 arg1);
 
 void rt2800_write_txwi(struct sk_buff *skb, struct txentry_desc *txdesc);
+void rt2800_process_rxwi(struct sk_buff *skb, struct rxdone_entry_desc *txdesc);
 
 extern const struct rt2x00debug rt2800_rt2x00debug;
 
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index bd56cd16485a..308842a2e8ba 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -770,20 +770,11 @@ static void rt2800pci_fill_rxdone(struct queue_entry *entry,
         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
         struct queue_entry_priv_pci *entry_priv = entry->priv_data;
         __le32 *rxd = entry_priv->desc;
-        __le32 *rxwi = (__le32 *)entry->skb->data;
-        u32 rxd3;
-        u32 rxwi0;
-        u32 rxwi1;
-        u32 rxwi2;
-        u32 rxwi3;
-
-        rt2x00_desc_read(rxd, 3, &rxd3);
-        rt2x00_desc_read(rxwi, 0, &rxwi0);
-        rt2x00_desc_read(rxwi, 1, &rxwi1);
-        rt2x00_desc_read(rxwi, 2, &rxwi2);
-        rt2x00_desc_read(rxwi, 3, &rxwi3);
-
-        if (rt2x00_get_field32(rxd3, RXD_W3_CRC_ERROR))
+        u32 word;
+
+        rt2x00_desc_read(rxd, 3, &word);
+
+        if (rt2x00_get_field32(word, RXD_W3_CRC_ERROR))
                 rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
 
         /*
@@ -791,10 +782,9 @@ static void rt2800pci_fill_rxdone(struct queue_entry *entry,
          * decryption. This prevents us from correct providing
          * correct statistics through debugfs.
          */
-        rxdesc->cipher = rt2x00_get_field32(rxwi0, RXWI_W0_UDF);
-        rxdesc->cipher_status = rt2x00_get_field32(rxd3, RXD_W3_CIPHER_ERROR);
+        rxdesc->cipher_status = rt2x00_get_field32(word, RXD_W3_CIPHER_ERROR);
 
-        if (rt2x00_get_field32(rxd3, RXD_W3_DECRYPTED)) {
+        if (rt2x00_get_field32(word, RXD_W3_DECRYPTED)) {
                 /*
                  * Hardware has stripped IV/EIV data from 802.11 frame during
                  * decryption. Unfortunately the descriptor doesn't contain
@@ -809,47 +799,22 @@ static void rt2800pci_fill_rxdone(struct queue_entry *entry,
                         rxdesc->flags |= RX_FLAG_MMIC_ERROR;
         }
 
-        if (rt2x00_get_field32(rxd3, RXD_W3_MY_BSS))
+        if (rt2x00_get_field32(word, RXD_W3_MY_BSS))
                 rxdesc->dev_flags |= RXDONE_MY_BSS;
 
-        if (rt2x00_get_field32(rxd3, RXD_W3_L2PAD))
+        if (rt2x00_get_field32(word, RXD_W3_L2PAD))
                 rxdesc->dev_flags |= RXDONE_L2PAD;
 
-        if (rt2x00_get_field32(rxwi1, RXWI_W1_SHORT_GI))
-                rxdesc->flags |= RX_FLAG_SHORT_GI;
-
-        if (rt2x00_get_field32(rxwi1, RXWI_W1_BW))
-                rxdesc->flags |= RX_FLAG_40MHZ;
-
         /*
-         * Detect RX rate, always use MCS as signal type.
+         * Process the RXWI structure that is at the start of the buffer.
          */
-        rxdesc->dev_flags |= RXDONE_SIGNAL_MCS;
-        rxdesc->rate_mode = rt2x00_get_field32(rxwi1, RXWI_W1_PHYMODE);
-        rxdesc->signal = rt2x00_get_field32(rxwi1, RXWI_W1_MCS);
-
-        /*
-         * Mask of 0x8 bit to remove the short preamble flag.
-         */
-        if (rxdesc->rate_mode == RATE_MODE_CCK)
-                rxdesc->signal &= ~0x8;
-
-        rxdesc->rssi =
-            (rt2x00_get_field32(rxwi2, RXWI_W2_RSSI0) +
-             rt2x00_get_field32(rxwi2, RXWI_W2_RSSI1)) / 2;
-
-        rxdesc->size = rt2x00_get_field32(rxwi0, RXWI_W0_MPDU_TOTAL_BYTE_COUNT);
+        rt2800_process_rxwi(entry->skb, rxdesc);
 
         /*
          * Set RX IDX in register to inform hardware that we have handled
          * this entry and it is available for reuse again.
          */
         rt2800_register_write(rt2x00dev, RX_CRX_IDX, entry->entry_idx);
-
-        /*
-         * Remove TXWI descriptor from start of buffer.
-         */
-        skb_pull(entry->skb, RXWI_DESC_SIZE);
 }
 
 /*
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index b39b858e0cf1..db371193b507 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -507,53 +507,45 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
 {
         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
         __le32 *rxi = (__le32 *)entry->skb->data;
-        __le32 *rxwi;
         __le32 *rxd;
-        u32 rxi0;
-        u32 rxwi0;
-        u32 rxwi1;
-        u32 rxwi2;
-        u32 rxwi3;
-        u32 rxd0;
+        u32 word;
         int rx_pkt_len;
 
         /*
+         * Copy descriptor to the skbdesc->desc buffer, making it safe from
+         * moving of frame data in rt2x00usb.
+         */
+        memcpy(skbdesc->desc, rxi, skbdesc->desc_len);
+
+        /*
          * RX frame format is :
          * | RXINFO | RXWI | header | L2 pad | payload | pad | RXD | USB pad |
          *          |<------------ rx_pkt_len -------------->|
          */
-        rt2x00_desc_read(rxi, 0, &rxi0);
-        rx_pkt_len = rt2x00_get_field32(rxi0, RXINFO_W0_USB_DMA_RX_PKT_LEN);
-
-        rxwi = (__le32 *)(entry->skb->data + RXINFO_DESC_SIZE);
+        rt2x00_desc_read(rxi, 0, &word);
+        rx_pkt_len = rt2x00_get_field32(word, RXINFO_W0_USB_DMA_RX_PKT_LEN);
 
         /*
-         * FIXME : we need to check for rx_pkt_len validity
+         * Remove the RXINFO structure from the sbk.
          */
-        rxd = (__le32 *)(entry->skb->data + RXINFO_DESC_SIZE + rx_pkt_len);
+        skb_pull(entry->skb, RXINFO_DESC_SIZE);
 
         /*
-         * Copy descriptor to the skbdesc->desc buffer, making it safe from
-         * moving of frame data in rt2x00usb.
+         * FIXME: we need to check for rx_pkt_len validity
          */
-        memcpy(skbdesc->desc, rxi, skbdesc->desc_len);
+        rxd = (__le32 *)(entry->skb->data + rx_pkt_len);
 
         /*
          * It is now safe to read the descriptor on all architectures.
          */
-        rt2x00_desc_read(rxwi, 0, &rxwi0);
-        rt2x00_desc_read(rxwi, 1, &rxwi1);
-        rt2x00_desc_read(rxwi, 2, &rxwi2);
-        rt2x00_desc_read(rxwi, 3, &rxwi3);
-        rt2x00_desc_read(rxd, 0, &rxd0);
+        rt2x00_desc_read(rxd, 0, &word);
 
-        if (rt2x00_get_field32(rxd0, RXD_W0_CRC_ERROR))
+        if (rt2x00_get_field32(word, RXD_W0_CRC_ERROR))
                 rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
 
-        rxdesc->cipher = rt2x00_get_field32(rxwi0, RXWI_W0_UDF);
-        rxdesc->cipher_status = rt2x00_get_field32(rxd0, RXD_W0_CIPHER_ERROR);
+        rxdesc->cipher_status = rt2x00_get_field32(word, RXD_W0_CIPHER_ERROR);
 
-        if (rt2x00_get_field32(rxd0, RXD_W0_DECRYPTED)) {
+        if (rt2x00_get_field32(word, RXD_W0_DECRYPTED)) {
                 /*
                  * Hardware has stripped IV/EIV data from 802.11 frame during
                  * decryption. Unfortunately the descriptor doesn't contain
@@ -568,41 +560,21 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
                         rxdesc->flags |= RX_FLAG_MMIC_ERROR;
         }
 
-        if (rt2x00_get_field32(rxd0, RXD_W0_MY_BSS))
+        if (rt2x00_get_field32(word, RXD_W0_MY_BSS))
                 rxdesc->dev_flags |= RXDONE_MY_BSS;
 
-        if (rt2x00_get_field32(rxd0, RXD_W0_L2PAD))
+        if (rt2x00_get_field32(word, RXD_W0_L2PAD))
                 rxdesc->dev_flags |= RXDONE_L2PAD;
 
-        if (rt2x00_get_field32(rxwi1, RXWI_W1_SHORT_GI))
-                rxdesc->flags |= RX_FLAG_SHORT_GI;
-
-        if (rt2x00_get_field32(rxwi1, RXWI_W1_BW))
-                rxdesc->flags |= RX_FLAG_40MHZ;
-
         /*
-         * Detect RX rate, always use MCS as signal type.
+         * Remove RXD descriptor from end of buffer.
          */
-        rxdesc->dev_flags |= RXDONE_SIGNAL_MCS;
-        rxdesc->rate_mode = rt2x00_get_field32(rxwi1, RXWI_W1_PHYMODE);
-        rxdesc->signal = rt2x00_get_field32(rxwi1, RXWI_W1_MCS);
-
-        /*
-         * Mask of 0x8 bit to remove the short preamble flag.
-         */
-        if (rxdesc->rate_mode == RATE_MODE_CCK)
-                rxdesc->signal &= ~0x8;
-
-        rxdesc->rssi =
-            (rt2x00_get_field32(rxwi2, RXWI_W2_RSSI0) +
-             rt2x00_get_field32(rxwi2, RXWI_W2_RSSI1)) / 2;
-
-        rxdesc->size = rt2x00_get_field32(rxwi0, RXWI_W0_MPDU_TOTAL_BYTE_COUNT);
+        skb_trim(entry->skb, rx_pkt_len);
 
         /*
-         * Remove RXWI descriptor from start of buffer.
+         * Process the RXWI structure.
          */
-        skb_pull(entry->skb, skbdesc->desc_len);
+        rt2800_process_rxwi(entry->skb, rxdesc);
 }
 
 /*