[PATCH] forcedeth: 64-bit DMA support

This is a multi-part message in MIME format.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 746ad0178f8ca6dafa21e6ca54c0124459c36a34..4d38acbac4ef1390dfd4514c26e065be87ef883a 100644 (file)
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -89,6 +89,7 @@
  *     0.37: 10 Jul 2005: Additional ethtool support, cleanup of pci id list
  *     0.38: 16 Jul 2005: tx irq rewrite: Use global flags instead of
  *                        per-packet flags.
+ *      0.39: 18 Jul 2005: Add 64bit descriptor support.
  *
  * Known bugs:
  * We suspect that on some hardware no TX done interrupts are generated.
@@ -100,7 +101,7 @@
  * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few
  * superfluous timer interrupts from the nic.
  */
-#define FORCEDETH_VERSION              "0.38"
+#define FORCEDETH_VERSION              "0.39"
 #define DRV_NAME                       "forcedeth"
 
 #include <linux/module.h>
@@ -138,6 +139,7 @@
 #define DEV_NEED_TIMERIRQ      0x0001  /* set the timer irq flag in the irq mask */
 #define DEV_NEED_LINKTIMER     0x0002  /* poll link settings. Relies on the timer irq */
 #define DEV_HAS_LARGEDESC      0x0004  /* device supports jumbo frames and needs packet format 2 */
+#define DEV_HAS_HIGH_DMA        0x0008  /* device supports 64bit dma */
 
 enum {
        NvRegIrqStatus = 0x000,
@@ -291,6 +293,18 @@ struct ring_desc {
        u32 FlagLen;
 };
 
+struct ring_desc_ex {
+       u32 PacketBufferHigh;
+       u32 PacketBufferLow;
+       u32 Reserved;
+       u32 FlagLen;
+};
+
+typedef union _ring_type {
+       struct ring_desc* orig;
+       struct ring_desc_ex* ex;
+} ring_type;
+
 #define FLAG_MASK_V1 0xffff0000
 #define FLAG_MASK_V2 0xffffc000
 #define LEN_MASK_V1 (0xffffffff ^ FLAG_MASK_V1)
@@ -405,6 +419,7 @@ struct ring_desc {
  */
 #define DESC_VER_1     0x0
 #define DESC_VER_2     (0x02100|NVREG_TXRXCTL_RXCHECK)
+#define DESC_VER_3      (0x02200|NVREG_TXRXCTL_RXCHECK)
 
 /* PHY defines */
 #define PHY_OUI_MARVELL        0x5043
@@ -477,7 +492,7 @@ struct fe_priv {
        /* rx specific fields.
         * Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
         */
-       struct ring_desc *rx_ring;
+       ring_type rx_ring;
        unsigned int cur_rx, refill_rx;
        struct sk_buff *rx_skbuff[RX_RING];
        dma_addr_t rx_dma[RX_RING];
@@ -494,7 +509,7 @@ struct fe_priv {
        /*
         * tx specific fields.
         */
-       struct ring_desc *tx_ring;
+       ring_type tx_ring;
        unsigned int next_tx, nic_tx;
        struct sk_buff *tx_skbuff[TX_RING];
        dma_addr_t tx_dma[TX_RING];
@@ -529,6 +544,11 @@ static inline u32 nv_descr_getlength(struct ring_desc *prd, u32 v)
                & ((v == DESC_VER_1) ? LEN_MASK_V1 : LEN_MASK_V2);
 }
 
+static inline u32 nv_descr_getlength_ex(struct ring_desc_ex *prd, u32 v)
+{
+       return le32_to_cpu(prd->FlagLen) & LEN_MASK_V2;
+}
+
 static int reg_delay(struct net_device *dev, int offset, u32 mask, u32 target,
                                int delay, int delaymax, const char *msg)
 {
@@ -813,9 +833,16 @@ static int nv_alloc_rx(struct net_device *dev)
                }
                np->rx_dma[nr] = pci_map_single(np->pci_dev, skb->data, skb->len,
                                                PCI_DMA_FROMDEVICE);
-               np->rx_ring[nr].PacketBuffer = cpu_to_le32(np->rx_dma[nr]);
-               wmb();
-               np->rx_ring[nr].FlagLen = cpu_to_le32(np->rx_buf_sz | NV_RX_AVAIL);
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
+                       np->rx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->rx_dma[nr]);
+                       wmb();
+                       np->rx_ring.orig[nr].FlagLen = cpu_to_le32(np->rx_buf_sz | NV_RX_AVAIL);
+               } else {
+                       np->rx_ring.ex[nr].PacketBufferHigh = cpu_to_le64(np->rx_dma[nr]) >> 32;
+                       np->rx_ring.ex[nr].PacketBufferLow = cpu_to_le64(np->rx_dma[nr]) & 0x0FFFFFFFF;
+                       wmb();
+                       np->rx_ring.ex[nr].FlagLen = cpu_to_le32(np->rx_buf_sz | NV_RX2_AVAIL);
+               }
                dprintk(KERN_DEBUG "%s: nv_alloc_rx: Packet %d marked as Available\n",
                                        dev->name, refill_rx);
                refill_rx++;
@@ -849,7 +876,10 @@ static void nv_init_rx(struct net_device *dev)
        np->cur_rx = RX_RING;
        np->refill_rx = 0;
        for (i = 0; i < RX_RING; i++)
-               np->rx_ring[i].FlagLen = 0;
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       np->rx_ring.orig[i].FlagLen = 0;
+               else
+                       np->rx_ring.ex[i].FlagLen = 0;
 }
 
 static void nv_init_tx(struct net_device *dev)
@@ -859,7 +889,10 @@ static void nv_init_tx(struct net_device *dev)
 
        np->next_tx = np->nic_tx = 0;
        for (i = 0; i < TX_RING; i++)
-               np->tx_ring[i].FlagLen = 0;
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       np->tx_ring.orig[i].FlagLen = 0;
+               else
+                       np->tx_ring.ex[i].FlagLen = 0;
 }
 
 static int nv_init_ring(struct net_device *dev)
@@ -874,7 +907,10 @@ static void nv_drain_tx(struct net_device *dev)
        struct fe_priv *np = get_nvpriv(dev);
        int i;
        for (i = 0; i < TX_RING; i++) {
-               np->tx_ring[i].FlagLen = 0;
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       np->tx_ring.orig[i].FlagLen = 0;
+               else
+                       np->tx_ring.ex[i].FlagLen = 0;
                if (np->tx_skbuff[i]) {
                        pci_unmap_single(np->pci_dev, np->tx_dma[i],
                                                np->tx_skbuff[i]->len,
@@ -891,7 +927,10 @@ static void nv_drain_rx(struct net_device *dev)
        struct fe_priv *np = get_nvpriv(dev);
        int i;
        for (i = 0; i < RX_RING; i++) {
-               np->rx_ring[i].FlagLen = 0;
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       np->rx_ring.orig[i].FlagLen = 0;
+               else
+                       np->rx_ring.ex[i].FlagLen = 0;
                wmb();
                if (np->rx_skbuff[i]) {
                        pci_unmap_single(np->pci_dev, np->rx_dma[i],
@@ -922,11 +961,19 @@ static int nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
        np->tx_dma[nr] = pci_map_single(np->pci_dev, skb->data,skb->len,
                                        PCI_DMA_TODEVICE);
 
-       np->tx_ring[nr].PacketBuffer = cpu_to_le32(np->tx_dma[nr]);
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+               np->tx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->tx_dma[nr]);
+       else {
+               np->tx_ring.ex[nr].PacketBufferHigh = cpu_to_le64(np->tx_dma[nr]) >> 32;
+               np->tx_ring.ex[nr].PacketBufferLow = cpu_to_le64(np->tx_dma[nr]) & 0x0FFFFFFFF;
+       }
 
        spin_lock_irq(&np->lock);
        wmb();
-       np->tx_ring[nr].FlagLen = cpu_to_le32( (skb->len-1) | np->tx_flags );
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+               np->tx_ring.orig[nr].FlagLen = cpu_to_le32( (skb->len-1) | np->tx_flags );
+       else
+               np->tx_ring.ex[nr].FlagLen = cpu_to_le32( (skb->len-1) | np->tx_flags );
        dprintk(KERN_DEBUG "%s: nv_start_xmit: packet packet %d queued for transmission.\n",
                                dev->name, np->next_tx);
        {
@@ -964,7 +1011,10 @@ static void nv_tx_done(struct net_device *dev)
        while (np->nic_tx != np->next_tx) {
                i = np->nic_tx % TX_RING;
 
-               Flags = le32_to_cpu(np->tx_ring[i].FlagLen);
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       Flags = le32_to_cpu(np->tx_ring.orig[i].FlagLen);
+               else
+                       Flags = le32_to_cpu(np->tx_ring.ex[i].FlagLen);
 
                dprintk(KERN_DEBUG "%s: nv_tx_done: looking at packet %d, Flags 0x%x.\n",
                                        dev->name, np->nic_tx, Flags);
@@ -1035,16 +1085,33 @@ static void nv_tx_timeout(struct net_device *dev)
                }
                printk(KERN_INFO "%s: Dumping tx ring\n", dev->name);
                for (i=0;i<TX_RING;i+= 4) {
-                       printk(KERN_INFO "%03x: %08x %08x // %08x %08x // %08x %08x // %08x %08x\n",
-                                       i, 
-                                       le32_to_cpu(np->tx_ring[i].PacketBuffer),
-                                       le32_to_cpu(np->tx_ring[i].FlagLen),
-                                       le32_to_cpu(np->tx_ring[i+1].PacketBuffer),
-                                       le32_to_cpu(np->tx_ring[i+1].FlagLen),
-                                       le32_to_cpu(np->tx_ring[i+2].PacketBuffer),
-                                       le32_to_cpu(np->tx_ring[i+2].FlagLen),
-                                       le32_to_cpu(np->tx_ring[i+3].PacketBuffer),
-                                       le32_to_cpu(np->tx_ring[i+3].FlagLen));
+                       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
+                               printk(KERN_INFO "%03x: %08x %08x // %08x %08x // %08x %08x // %08x %08x\n",
+                                      i, 
+                                      le32_to_cpu(np->tx_ring.orig[i].PacketBuffer),
+                                      le32_to_cpu(np->tx_ring.orig[i].FlagLen),
+                                      le32_to_cpu(np->tx_ring.orig[i+1].PacketBuffer),
+                                      le32_to_cpu(np->tx_ring.orig[i+1].FlagLen),
+                                      le32_to_cpu(np->tx_ring.orig[i+2].PacketBuffer),
+                                      le32_to_cpu(np->tx_ring.orig[i+2].FlagLen),
+                                      le32_to_cpu(np->tx_ring.orig[i+3].PacketBuffer),
+                                      le32_to_cpu(np->tx_ring.orig[i+3].FlagLen));
+                       } else {
+                               printk(KERN_INFO "%03x: %08x %08x %08x // %08x %08x %08x // %08x %08x %08x // %08x %08x %08x\n",
+                                      i, 
+                                      le32_to_cpu(np->tx_ring.ex[i].PacketBufferHigh),
+                                      le32_to_cpu(np->tx_ring.ex[i].PacketBufferLow),
+                                      le32_to_cpu(np->tx_ring.ex[i].FlagLen),
+                                      le32_to_cpu(np->tx_ring.ex[i+1].PacketBufferHigh),
+                                      le32_to_cpu(np->tx_ring.ex[i+1].PacketBufferLow),
+                                      le32_to_cpu(np->tx_ring.ex[i+1].FlagLen),
+                                      le32_to_cpu(np->tx_ring.ex[i+2].PacketBufferHigh),
+                                      le32_to_cpu(np->tx_ring.ex[i+2].PacketBufferLow),
+                                      le32_to_cpu(np->tx_ring.ex[i+2].FlagLen),
+                                      le32_to_cpu(np->tx_ring.ex[i+3].PacketBufferHigh),
+                                      le32_to_cpu(np->tx_ring.ex[i+3].PacketBufferLow),
+                                      le32_to_cpu(np->tx_ring.ex[i+3].FlagLen));
+                       }
                }
        }
 
@@ -1061,7 +1128,10 @@ static void nv_tx_timeout(struct net_device *dev)
                printk(KERN_DEBUG "%s: tx_timeout: dead entries!\n", dev->name);
                nv_drain_tx(dev);
                np->next_tx = np->nic_tx = 0;
-               writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+               else
+                       writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr);
                netif_wake_queue(dev);
        }
 
@@ -1136,8 +1206,13 @@ static void nv_rx_process(struct net_device *dev)
                        break;  /* we scanned the whole ring - do not continue */
 
                i = np->cur_rx % RX_RING;
-               Flags = le32_to_cpu(np->rx_ring[i].FlagLen);
-               len = nv_descr_getlength(&np->rx_ring[i], np->desc_ver);
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
+                       Flags = le32_to_cpu(np->rx_ring.orig[i].FlagLen);
+                       len = nv_descr_getlength(&np->rx_ring.orig[i], np->desc_ver);
+               } else {
+                       Flags = le32_to_cpu(np->rx_ring.ex[i].FlagLen);
+                       len = nv_descr_getlength_ex(&np->rx_ring.ex[i], np->desc_ver);
+               }
 
                dprintk(KERN_DEBUG "%s: nv_rx_process: looking at packet %d, Flags 0x%x.\n",
                                        dev->name, np->cur_rx, Flags);
@@ -1321,7 +1396,10 @@ static int nv_change_mtu(struct net_device *dev, int new_mtu)
                /* reinit nic view of the rx queue */
                writel(np->rx_buf_sz, base + NvRegOffloadConfig);
                writel((u32) np->ring_addr, base + NvRegRxRingPhysAddr);
-               writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+               if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+                       writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+               else
+                       writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr);
                writel( ((RX_RING-1) << NVREG_RINGSZ_RXSHIFT) + ((TX_RING-1) << NVREG_RINGSZ_TXSHIFT),
                        base + NvRegRingSizes);
                pci_push(base);
@@ -1982,7 +2060,10 @@ static int nv_open(struct net_device *dev)
 
        /* 4) give hw rings */
        writel((u32) np->ring_addr, base + NvRegRxRingPhysAddr);
-       writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+               writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
+       else
+               writel((u32) (np->ring_addr + RX_RING*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr);
        writel( ((RX_RING-1) << NVREG_RINGSZ_RXSHIFT) + ((TX_RING-1) << NVREG_RINGSZ_TXSHIFT),
                base + NvRegRingSizes);
 
@@ -2173,24 +2254,48 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
        }
 
        /* handle different descriptor versions */
-       np->desc_ver = DESC_VER_1;
-       np->pkt_limit = NV_PKTLIMIT_1;
-       if (id->driver_data & DEV_HAS_LARGEDESC) {
+       if (id->driver_data & DEV_HAS_HIGH_DMA) {
+               /* packet format 3: supports 40-bit addressing */
+               np->desc_ver = DESC_VER_3;
+               if (pci_set_dma_mask(pci_dev, 0x0000007fffffffffULL)) {
+                       printk(KERN_INFO "forcedeth: 64-bit DMA failed, using 32-bit addressing for device %s.\n",
+                                       pci_name(pci_dev));
+               }
+       } else if (id->driver_data & DEV_HAS_LARGEDESC) {
+               /* packet format 2: supports jumbo frames */
                np->desc_ver = DESC_VER_2;
-               np->pkt_limit = NV_PKTLIMIT_2;
+       } else {
+               /* original packet format */
+               np->desc_ver = DESC_VER_1;
        }
- 
+
+       np->pkt_limit = NV_PKTLIMIT_1;
+       if (id->driver_data & DEV_HAS_LARGEDESC)
+               np->pkt_limit = NV_PKTLIMIT_2;
+
        err = -ENOMEM;
        np->base = ioremap(addr, NV_PCI_REGSZ);
        if (!np->base)
                goto out_relreg;
        dev->base_addr = (unsigned long)np->base;
+
        dev->irq = pci_dev->irq;
-       np->rx_ring = pci_alloc_consistent(pci_dev, sizeof(struct ring_desc) * (RX_RING + TX_RING),
-                                               &np->ring_addr);
-       if (!np->rx_ring)
-               goto out_unmap;
-       np->tx_ring = &np->rx_ring[RX_RING];
+
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
+               np->rx_ring.orig = pci_alloc_consistent(pci_dev,
+                                       sizeof(struct ring_desc) * (RX_RING + TX_RING),
+                                       &np->ring_addr);
+               if (!np->rx_ring.orig)
+                       goto out_unmap;
+               np->tx_ring.orig = &np->rx_ring.orig[RX_RING];
+       } else {
+               np->rx_ring.ex = pci_alloc_consistent(pci_dev,
+                                       sizeof(struct ring_desc_ex) * (RX_RING + TX_RING),
+                                       &np->ring_addr);
+               if (!np->rx_ring.ex)
+                       goto out_unmap;
+               np->tx_ring.ex = &np->rx_ring.ex[RX_RING];
+       }
 
        dev->open = nv_open;
        dev->stop = nv_close;
@@ -2313,8 +2418,12 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
        return 0;
 
 out_freering:
-       pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (RX_RING + TX_RING),
-                               np->rx_ring, np->ring_addr);
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+               pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (RX_RING + TX_RING),
+                                   np->rx_ring.orig, np->ring_addr);
+       else
+               pci_free_consistent(np->pci_dev, sizeof(struct ring_desc_ex) * (RX_RING + TX_RING),
+                                   np->rx_ring.ex, np->ring_addr);
        pci_set_drvdata(pci_dev, NULL);
 out_unmap:
        iounmap(get_hwbase(dev));
@@ -2343,7 +2452,10 @@ static void __devexit nv_remove(struct pci_dev *pci_dev)
        writel(np->orig_mac[1], base + NvRegMacAddrB);
 
        /* free all structures */
-       pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (RX_RING + TX_RING), np->rx_ring, np->ring_addr);
+       if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
+               pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (RX_RING + TX_RING), np->rx_ring.orig, np->ring_addr);
+       else
+               pci_free_consistent(np->pci_dev, sizeof(struct ring_desc_ex) * (RX_RING + TX_RING), np->rx_ring.ex, np->ring_addr);
        iounmap(get_hwbase(dev));
        pci_release_regions(pci_dev);
        pci_disable_device(pci_dev);
@@ -2382,35 +2494,35 @@ static struct pci_device_id pci_tbl[] = {
        },
        {       /* CK804 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_8),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {       /* CK804 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_9),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP04 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_10),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP04 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_11),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP51 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_12),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP51 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_13),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP55 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_14),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {       /* MCP55 Ethernet Controller */
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_15),
-               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC,
+               .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA,
        },
        {0,},
 };