1 files changed, 91 insertions, 103 deletions

diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 7ce734ec6ba8..189203c95330 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -42,7 +42,7 @@
 #include "skge.h"
 
 #define DRV_NAME                "skge"
-#define DRV_VERSION             "1.0"
+#define DRV_VERSION             "1.1"
 #define PFX                     DRV_NAME " "
 
 #define DEFAULT_TX_RING_SIZE    128
@@ -105,41 +105,28 @@ static const u32 rxirqmask[] = { IS_R1_F, IS_R2_F };
 static const u32 txirqmask[] = { IS_XA1_F, IS_XA2_F };
 static const u32 portirqmask[] = { IS_PORT_1, IS_PORT_2 };
 
-/* Don't need to look at whole 16K.
- * last interesting register is descriptor poll timer.
- */
-#define SKGE_REGS_LEN   (29*128)
-
 static int skge_get_regs_len(struct net_device *dev)
 {
-        return SKGE_REGS_LEN;
+        return 0x4000;
 }
 
 /*
- * Returns copy of control register region
- * I/O region is divided into banks and certain regions are unreadable
+ * Returns copy of whole control register region
+ * Note: skip RAM address register because accessing it will
+ *       cause bus hangs!
  */
 static void skge_get_regs(struct net_device *dev, struct ethtool_regs *regs,
                           void *p)
 {
         const struct skge_port *skge = netdev_priv(dev);
-        unsigned long offs;
         const void __iomem *io = skge->hw->regs;
-        static const unsigned long bankmap
-                = (1<<0) | (1<<2) | (1<<8) | (1<<9)
-                  | (1<<12) | (1<<13) | (1<<14) | (1<<15) | (1<<16)
-                  | (1<<17) | (1<<20) | (1<<21) | (1<<22) | (1<<23)
-                  | (1<<24)  | (1<<25) | (1<<26) | (1<<27) | (1<<28);
 
         regs->version = 1;
-        for (offs = 0; offs < regs->len; offs += 128) {
-                u32 len = min_t(u32, 128, regs->len - offs);
+        memset(p, 0, regs->len);
+        memcpy_fromio(p, io, B3_RAM_ADDR);
 
-                if (bankmap & (1<<(offs/128)))
-                        memcpy_fromio(p + offs, io + offs, len);
-                else
-                        memset(p + offs, 0, len);
-        }
+        memcpy_fromio(p + B3_RI_WTO_R1, io + B3_RI_WTO_R1,
+                      regs->len - B3_RI_WTO_R1);
 }
 
 /* Wake on Lan only supported on Yukon chps with rev 1 or above */
@@ -776,17 +763,6 @@ static int skge_ring_alloc(struct skge_ring *ring, void *vaddr, u64 base)
         return 0;
 }
 
-static struct sk_buff *skge_rx_alloc(struct net_device *dev, unsigned int size)
-{
-        struct sk_buff *skb = dev_alloc_skb(size);
-
-        if (likely(skb)) {
-                skb->dev = dev;
-                skb_reserve(skb, NET_IP_ALIGN);
-        }
-        return skb;
-}
-
 /* Allocate and setup a new buffer for receiving */
 static void skge_rx_setup(struct skge_port *skge, struct skge_element *e,
                           struct sk_buff *skb, unsigned int bufsize)
@@ -859,16 +835,17 @@ static int skge_rx_fill(struct skge_port *skge)
 {
         struct skge_ring *ring = &skge->rx_ring;
         struct skge_element *e;
-        unsigned int bufsize = skge->rx_buf_size;
 
         e = ring->start;
         do {
-                struct sk_buff *skb = skge_rx_alloc(skge->netdev, bufsize);
+                struct sk_buff *skb;
 
+                skb = dev_alloc_skb(skge->rx_buf_size + NET_IP_ALIGN);
                 if (!skb)
                         return -ENOMEM;
 
-                skge_rx_setup(skge, e, skb, bufsize);
+                skb_reserve(skb, NET_IP_ALIGN);
+                skge_rx_setup(skge, e, skb, skge->rx_buf_size);
         } while ( (e = e->next) != ring->start);
 
         ring->to_clean = ring->start;
@@ -2443,6 +2420,14 @@ static void yukon_set_multicast(struct net_device *dev)
         gma_write16(hw, port, GM_RX_CTRL, reg);
 }
 
+static inline u16 phy_length(const struct skge_hw *hw, u32 status)
+{
+        if (hw->chip_id == CHIP_ID_GENESIS)
+                return status >> XMR_FS_LEN_SHIFT;
+        else
+                return status >> GMR_FS_LEN_SHIFT;
+}
+
 static inline int bad_phy_status(const struct skge_hw *hw, u32 status)
 {
         if (hw->chip_id == CHIP_ID_GENESIS)
@@ -2452,80 +2437,99 @@ static inline int bad_phy_status(const struct skge_hw *hw, u32 status)
                         (status & GMR_FS_RX_OK) == 0;
 }
 
-static void skge_rx_error(struct skge_port *skge, int slot,
-                          u32 control, u32 status)
-{
-        if (netif_msg_rx_err(skge))
-                printk(KERN_DEBUG PFX "%s: rx err, slot %d control 0x%x status 0x%x\n",
-                       skge->netdev->name, slot, control, status);
-
-        if ((control & (BMU_EOF|BMU_STF)) != (BMU_STF|BMU_EOF))
-                skge->net_stats.rx_length_errors++;
-        else if (skge->hw->chip_id == CHIP_ID_GENESIS) {
-                if (status & (XMR_FS_RUNT|XMR_FS_LNG_ERR))
-                        skge->net_stats.rx_length_errors++;
-                if (status & XMR_FS_FRA_ERR)
-                        skge->net_stats.rx_frame_errors++;
-                if (status & XMR_FS_FCS_ERR)
-                        skge->net_stats.rx_crc_errors++;
-        } else {
-                if (status & (GMR_FS_LONG_ERR|GMR_FS_UN_SIZE))
-                        skge->net_stats.rx_length_errors++;
-                if (status & GMR_FS_FRAGMENT)
-                        skge->net_stats.rx_frame_errors++;
-                if (status & GMR_FS_CRC_ERR)
-                        skge->net_stats.rx_crc_errors++;
-        }
-}
 
 /* Get receive buffer from descriptor.
  * Handles copy of small buffers and reallocation failures
  */
 static inline struct sk_buff *skge_rx_get(struct skge_port *skge,
                                           struct skge_element *e,
-                                          unsigned int len)
+                                          u32 control, u32 status, u16 csum)
 {
-        struct sk_buff *nskb, *skb;
+        struct sk_buff *skb;
+        u16 len = control & BMU_BBC;
+
+        if (unlikely(netif_msg_rx_status(skge)))
+                printk(KERN_DEBUG PFX "%s: rx slot %td status 0x%x len %d\n",
+                       skge->netdev->name, e - skge->rx_ring.start,
+                       status, len);
+
+        if (len > skge->rx_buf_size)
+                goto error;
+
+        if ((control & (BMU_EOF|BMU_STF)) != (BMU_STF|BMU_EOF))
+                goto error;
+
+        if (bad_phy_status(skge->hw, status))
+                goto error;
+
+        if (phy_length(skge->hw, status) != len)
+                goto error;
 
         if (len < RX_COPY_THRESHOLD) {
-                nskb = skge_rx_alloc(skge->netdev, len + NET_IP_ALIGN);
-                if (unlikely(!nskb))
-                        return NULL;
+                skb = dev_alloc_skb(len + 2);
+                if (!skb)
+                        goto resubmit;
 
+                skb_reserve(skb, 2);
                 pci_dma_sync_single_for_cpu(skge->hw->pdev,
                                             pci_unmap_addr(e, mapaddr),
                                             len, PCI_DMA_FROMDEVICE);
-                memcpy(nskb->data, e->skb->data, len);
+                memcpy(skb->data, e->skb->data, len);
                 pci_dma_sync_single_for_device(skge->hw->pdev,
                                                pci_unmap_addr(e, mapaddr),
                                                len, PCI_DMA_FROMDEVICE);
-
-                if (skge->rx_csum) {
-                        struct skge_rx_desc *rd = e->desc;
-                        nskb->csum = le16_to_cpu(rd->csum2);
-                        nskb->ip_summed = CHECKSUM_HW;
-                }
                 skge_rx_reuse(e, skge->rx_buf_size);
-                return nskb;
         } else {
-                nskb = skge_rx_alloc(skge->netdev, skge->rx_buf_size);
-                if (unlikely(!nskb))
-                        return NULL;
+                struct sk_buff *nskb;
+                nskb = dev_alloc_skb(skge->rx_buf_size + NET_IP_ALIGN);
+                if (!nskb)
+                        goto resubmit;
 
                 pci_unmap_single(skge->hw->pdev,
                                  pci_unmap_addr(e, mapaddr),
                                  pci_unmap_len(e, maplen),
                                  PCI_DMA_FROMDEVICE);
                 skb = e->skb;
-                if (skge->rx_csum) {
-                        struct skge_rx_desc *rd = e->desc;
-                        skb->csum = le16_to_cpu(rd->csum2);
-                        skb->ip_summed = CHECKSUM_HW;
-                }
-
+                prefetch(skb->data);
                 skge_rx_setup(skge, e, nskb, skge->rx_buf_size);
-                return skb;
         }
+
+        skb_put(skb, len);
+        skb->dev = skge->netdev;
+        if (skge->rx_csum) {
+                skb->csum = csum;
+                skb->ip_summed = CHECKSUM_HW;
+        }
+
+        skb->protocol = eth_type_trans(skb, skge->netdev);
+
+        return skb;
+error:
+
+        if (netif_msg_rx_err(skge))
+                printk(KERN_DEBUG PFX "%s: rx err, slot %td control 0x%x status 0x%x\n",
+                       skge->netdev->name, e - skge->rx_ring.start,
+                       control, status);
+
+        if (skge->hw->chip_id == CHIP_ID_GENESIS) {
+                if (status & (XMR_FS_RUNT|XMR_FS_LNG_ERR))
+                        skge->net_stats.rx_length_errors++;
+                if (status & XMR_FS_FRA_ERR)
+                        skge->net_stats.rx_frame_errors++;
+                if (status & XMR_FS_FCS_ERR)
+                        skge->net_stats.rx_crc_errors++;
+        } else {
+                if (status & (GMR_FS_LONG_ERR|GMR_FS_UN_SIZE))
+                        skge->net_stats.rx_length_errors++;
+                if (status & GMR_FS_FRAGMENT)
+                        skge->net_stats.rx_frame_errors++;
+                if (status & GMR_FS_CRC_ERR)
+                        skge->net_stats.rx_crc_errors++;
+        }
+
+resubmit:
+        skge_rx_reuse(e, skge->rx_buf_size);
+        return NULL;
 }
 
 
@@ -2541,32 +2545,16 @@ static int skge_poll(struct net_device *dev, int *budget)
         for (e = ring->to_clean; work_done < to_do; e = e->next) {
                 struct skge_rx_desc *rd = e->desc;
                 struct sk_buff *skb;
-                u32 control, len, status;
+                u32 control;
 
                 rmb();
                 control = rd->control;
                 if (control & BMU_OWN)
                         break;
 
-                len = control & BMU_BBC;
-                status = rd->status;
-
-                if (unlikely((control & (BMU_EOF|BMU_STF)) != (BMU_STF|BMU_EOF)
-                             || bad_phy_status(hw, status))) {
-                        skge_rx_error(skge, e - ring->start, control, status);
-                        skge_rx_reuse(e, skge->rx_buf_size);
-                        continue;
-                }
-
-                if (netif_msg_rx_status(skge))
-                    printk(KERN_DEBUG PFX "%s: rx slot %td status 0x%x len %d\n",
-                           dev->name, e - ring->start, rd->status, len);
-
-                skb = skge_rx_get(skge, e, len);
+                skb = skge_rx_get(skge, e, control, rd->status,
+                                  le16_to_cpu(rd->csum2));
                 if (likely(skb)) {
-                        skb_put(skb, len);
-                        skb->protocol = eth_type_trans(skb, dev);
-
                         dev->last_rx = jiffies;
                         netif_receive_skb(skb);