qla3xxx: bugfix: Fixed jumbo frame handling for 3032 chip.

The scatter/gather lists were not being build correctly.  When
large frames spanned several buffers the chip would panic.

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 64 insertions, 36 deletions

diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index bdf1a400430a..4e9b25f475d0 100755
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -2122,11 +2122,13 @@ static void ql_hw_csum_setup(struct sk_buff *skb,
 
         if (ip) {
                 if (ip->protocol == IPPROTO_TCP) {
-                        mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_TC;
+                        mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_TC | 
+                        OB_3032MAC_IOCB_REQ_IC;
                         mac_iocb_ptr->ip_hdr_off = offset;
                         mac_iocb_ptr->ip_hdr_len = ip->ihl;
                 } else if (ip->protocol == IPPROTO_UDP) {
-                        mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_UC;
+                        mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_UC | 
+                        OB_3032MAC_IOCB_REQ_IC;
                         mac_iocb_ptr->ip_hdr_off = offset;
                         mac_iocb_ptr->ip_hdr_len = ip->ihl;
                 }
@@ -2134,51 +2136,29 @@ static void ql_hw_csum_setup(struct sk_buff *skb,
 }
 
 /*
- * The difference between 3022 and 3032 sends:
- * 3022 only supports a simple single segment transmission.
- * 3032 supports checksumming and scatter/gather lists (fragments).
- * The 3032 supports sglists by using the 3 addr/len pairs (ALP) 
- * in the IOCB plus a chain of outbound address lists (OAL) that 
- * each contain 5 ALPs.  The last ALP of the IOCB (3rd) or OAL (5th) 
- * will used to point to an OAL when more ALP entries are required.  
- * The IOCB is always the top of the chain followed by one or more 
- * OALs (when necessary).
+ * Map the buffers for this transmit.  This will return
+ * NETDEV_TX_BUSY or NETDEV_TX_OK based on success.
  */
-static int ql3xxx_send(struct sk_buff *skb, struct net_device *ndev)
+static int ql_send_map(struct ql3_adapter *qdev,
+                                struct ob_mac_iocb_req *mac_iocb_ptr,
+                                struct ql_tx_buf_cb *tx_cb,
+                                struct sk_buff *skb)
 {
-        struct ql3_adapter *qdev = (struct ql3_adapter *)netdev_priv(ndev);
-        struct ql3xxx_port_registers __iomem *port_regs = qdev->mem_map_registers;
-        struct ql_tx_buf_cb *tx_cb;
-        u32 tot_len = skb->len;
         struct oal *oal;
         struct oal_entry *oal_entry;
-        int len;
-        struct ob_mac_iocb_req *mac_iocb_ptr;
+        int len = skb_headlen(skb);
         u64 map;
         int seg_cnt, seg = 0;
         int frag_cnt = (int)skb_shinfo(skb)->nr_frags;
 
-        if (unlikely(atomic_read(&qdev->tx_count) < 2)) {
-                if (!netif_queue_stopped(ndev))
-                        netif_stop_queue(ndev);
-                return NETDEV_TX_BUSY;
-        }
-        tx_cb = &qdev->tx_buf[qdev->req_producer_index] ;
         seg_cnt = tx_cb->seg_count = ql_get_seg_count((skb_shinfo(skb)->nr_frags));
         if(seg_cnt == -1) {
                 printk(KERN_ERR PFX"%s: invalid segment count!\n",__func__);
-                return NETDEV_TX_OK;
-
+                return NETDEV_TX_BUSY;
         }
-        mac_iocb_ptr = tx_cb->queue_entry;
-        mac_iocb_ptr->opcode = qdev->mac_ob_opcode;
-        mac_iocb_ptr->flags |= qdev->mb_bit_mask;
-        mac_iocb_ptr->transaction_id = qdev->req_producer_index;
-        mac_iocb_ptr->data_len = cpu_to_le16((u16) tot_len);
-        tx_cb->skb = skb;
-        if (skb->ip_summed == CHECKSUM_PARTIAL)
-                ql_hw_csum_setup(skb, mac_iocb_ptr);
-        len = skb_headlen(skb);
+        /*
+         * Map the skb buffer first.
+         */
         map = pci_map_single(qdev->pdev, skb->data, len, PCI_DMA_TODEVICE);
         oal_entry = (struct oal_entry *)&mac_iocb_ptr->buf_addr0_low;
         oal_entry->dma_lo = cpu_to_le32(LS_64BITS(map));
@@ -2235,6 +2215,55 @@ static int ql3xxx_send(struct sk_buff *skb, struct net_device *ndev)
                 oal_entry->len =
                     cpu_to_le32(le32_to_cpu(oal_entry->len) | OAL_LAST_ENTRY);
         }
+        return NETDEV_TX_OK;
+}
+
+/*
+ * The difference between 3022 and 3032 sends:
+ * 3022 only supports a simple single segment transmission.
+ * 3032 supports checksumming and scatter/gather lists (fragments).
+ * The 3032 supports sglists by using the 3 addr/len pairs (ALP) 
+ * in the IOCB plus a chain of outbound address lists (OAL) that 
+ * each contain 5 ALPs.  The last ALP of the IOCB (3rd) or OAL (5th) 
+ * will used to point to an OAL when more ALP entries are required.  
+ * The IOCB is always the top of the chain followed by one or more 
+ * OALs (when necessary).
+ */
+static int ql3xxx_send(struct sk_buff *skb, struct net_device *ndev)
+{
+        struct ql3_adapter *qdev = (struct ql3_adapter *)netdev_priv(ndev);
+        struct ql3xxx_port_registers __iomem *port_regs = qdev->mem_map_registers;
+        struct ql_tx_buf_cb *tx_cb;
+        u32 tot_len = skb->len;
+        struct ob_mac_iocb_req *mac_iocb_ptr;
+
+        if (unlikely(atomic_read(&qdev->tx_count) < 2)) {
+                if (!netif_queue_stopped(ndev))
+                        netif_stop_queue(ndev);
+                return NETDEV_TX_BUSY;
+        }
+        
+        tx_cb = &qdev->tx_buf[qdev->req_producer_index] ;
+        if((tx_cb->seg_count = ql_get_seg_count((skb_shinfo(skb)->nr_frags))) == -1) {
+                printk(KERN_ERR PFX"%s: invalid segment count!\n",__func__);
+                return NETDEV_TX_OK;
+        }
+        
+        mac_iocb_ptr = tx_cb->queue_entry;
+        mac_iocb_ptr->opcode = qdev->mac_ob_opcode;
+        mac_iocb_ptr->flags = OB_MAC_IOCB_REQ_X;
+        mac_iocb_ptr->flags |= qdev->mb_bit_mask;
+        mac_iocb_ptr->transaction_id = qdev->req_producer_index;
+        mac_iocb_ptr->data_len = cpu_to_le16((u16) tot_len);
+        tx_cb->skb = skb;
+        if (skb->ip_summed == CHECKSUM_PARTIAL)
+                ql_hw_csum_setup(skb, mac_iocb_ptr);
+        
+        if(ql_send_map(qdev,mac_iocb_ptr,tx_cb,skb) != NETDEV_TX_OK) {
+                printk(KERN_ERR PFX"%s: Could not map the segments!\n",__func__);
+                return NETDEV_TX_BUSY;
+        }
+        
         wmb();
         qdev->req_producer_index++;
         if (qdev->req_producer_index == NUM_REQ_Q_ENTRIES)
diff --git a/drivers/net/qla3xxx.h b/drivers/net/qla3xxx.h
index 51173e585ce9..40913d2c7097 100755
--- a/drivers/net/qla3xxx.h
+++ b/drivers/net/qla3xxx.h
@@ -1094,7 +1094,6 @@ struct oal_entry {
         u32 len;
 #define OAL_LAST_ENTRY   0x80000000     /* Last valid buffer in list. */
 #define OAL_CONT_ENTRY   0x40000000     /* points to an OAL. (continuation) */
-        u32 reserved;
 };
 
 struct oal {