diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tg3.c | 87 |
1 files changed, 59 insertions, 28 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index e8e92c853e89db..15545620ab0e2d 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -3532,9 +3532,23 @@ static inline int tg3_4g_overflow_test(dma_addr_t mapping, int len) (base + len + 8 < base)); } +/* Test for DMA addresses > 40-bit */ +static inline int tg3_40bit_overflow_test(struct tg3 *tp, dma_addr_t mapping, + int len) +{ +#if defined(CONFIG_HIGHMEM) && (BITS_PER_LONG == 64) + if (tp->tg3_flags2 & TG3_FLG2_5780_CLASS) + return (((u64) mapping + len) > DMA_40BIT_MASK); + return 0; +#else + return 0; +#endif +} + static void tg3_set_txd(struct tg3 *, int, dma_addr_t, int, u32, u32); -static int tigon3_4gb_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb, +/* Workaround 4GB and 40-bit hardware DMA bugs. */ +static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb, u32 last_plus_one, u32 *start, u32 base_flags, u32 mss) { @@ -3742,6 +3756,9 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) if (tg3_4g_overflow_test(mapping, len)) would_hit_hwbug = 1; + if (tg3_40bit_overflow_test(tp, mapping, len)) + would_hit_hwbug = 1; + if (tp->tg3_flags2 & TG3_FLG2_HW_TSO) tg3_set_txd(tp, entry, mapping, len, base_flags, (i == last)|(mss << 1)); @@ -3763,7 +3780,7 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) /* If the workaround fails due to memory/mapping * failure, silently drop this packet. */ - if (tigon3_4gb_hwbug_workaround(tp, skb, last_plus_one, + if (tigon3_dma_hwbug_workaround(tp, skb, last_plus_one, &start, base_flags, mss)) goto out_unlock; @@ -10608,8 +10625,9 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, unsigned long tg3reg_base, tg3reg_len; struct net_device *dev; struct tg3 *tp; - int i, err, pci_using_dac, pm_cap; + int i, err, pm_cap; char str[40]; + u64 dma_mask, persist_dma_mask; if (tg3_version_printed++ == 0) printk(KERN_INFO "%s", version); @@ -10646,26 +10664,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, goto err_out_free_res; } - /* Configure DMA attributes. */ - err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); - if (!err) { - pci_using_dac = 1; - err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); - if (err < 0) { - printk(KERN_ERR PFX "Unable to obtain 64 bit DMA " - "for consistent allocations\n"); - goto err_out_free_res; - } - } else { - err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (err) { - printk(KERN_ERR PFX "No usable DMA configuration, " - "aborting.\n"); - goto err_out_free_res; - } - pci_using_dac = 0; - } - tg3reg_base = pci_resource_start(pdev, 0); tg3reg_len = pci_resource_len(pdev, 0); @@ -10679,8 +10677,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, SET_MODULE_OWNER(dev); SET_NETDEV_DEV(dev, &pdev->dev); - if (pci_using_dac) - dev->features |= NETIF_F_HIGHDMA; dev->features |= NETIF_F_LLTX; #if TG3_VLAN_TAG_USED dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; @@ -10765,6 +10761,44 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, goto err_out_iounmap; } + /* 5714, 5715 and 5780 cannot support DMA addresses > 40-bit. + * On 64-bit systems with IOMMU, use 40-bit dma_mask. + * On 64-bit systems without IOMMU, use 64-bit dma_mask and + * do DMA address check in tg3_start_xmit(). + */ + if (tp->tg3_flags2 & TG3_FLG2_5780_CLASS) { + persist_dma_mask = dma_mask = DMA_40BIT_MASK; +#ifdef CONFIG_HIGHMEM + dma_mask = DMA_64BIT_MASK; +#endif + } else if (tp->tg3_flags2 & TG3_FLG2_IS_5788) + persist_dma_mask = dma_mask = DMA_32BIT_MASK; + else + persist_dma_mask = dma_mask = DMA_64BIT_MASK; + + /* Configure DMA attributes. */ + if (dma_mask > DMA_32BIT_MASK) { + err = pci_set_dma_mask(pdev, dma_mask); + if (!err) { + dev->features |= NETIF_F_HIGHDMA; + err = pci_set_consistent_dma_mask(pdev, + persist_dma_mask); + if (err < 0) { + printk(KERN_ERR PFX "Unable to obtain 64 bit " + "DMA for consistent allocations\n"); + goto err_out_iounmap; + } + } + } + if (err || dma_mask == DMA_32BIT_MASK) { + err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + printk(KERN_ERR PFX "No usable DMA configuration, " + "aborting.\n"); + goto err_out_iounmap; + } + } + tg3_init_bufmgr_config(tp); #if TG3_TSO_SUPPORT != 0 @@ -10833,9 +10867,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, } else tp->tg3_flags &= ~TG3_FLAG_RX_CHECKSUMS; - if (tp->tg3_flags2 & TG3_FLG2_IS_5788) - dev->features &= ~NETIF_F_HIGHDMA; - /* flow control autonegotiation is default behavior */ tp->tg3_flags |= TG3_FLAG_PAUSE_AUTONEG; |