openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [TG3]: Add DMA address workaround
This commit is contained in:
Linus Torvalds 2006-03-07 10:29:54 -08:00
parent d19e997408 72f2afb8a6
commit d0b004840b
1 changed files with 59 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
drivers/net/tg3.c
View File

@ -3532,9 +3532,23 @@ static inline int tg3_4g_overflow_test(dma_addr_t mapping, int len)
(base + len + 8 < base)); (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 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 last_plus_one, u32 *start,
u32 base_flags, u32 mss) 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)) if (tg3_4g_overflow_test(mapping, len))
would_hit_hwbug = 1; would_hit_hwbug = 1;
if (tg3_40bit_overflow_test(tp, mapping, len))
would_hit_hwbug = 1;
if (tp->tg3_flags2 & TG3_FLG2_HW_TSO) if (tp->tg3_flags2 & TG3_FLG2_HW_TSO)
tg3_set_txd(tp, entry, mapping, len, tg3_set_txd(tp, entry, mapping, len,
base_flags, (i == last)|(mss << 1)); 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 /* If the workaround fails due to memory/mapping
* failure, silently drop this packet. * 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)) &start, base_flags, mss))
goto out_unlock; goto out_unlock;
@ -10608,8 +10625,9 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
unsigned long tg3reg_base, tg3reg_len; unsigned long tg3reg_base, tg3reg_len;
struct net_device *dev; struct net_device *dev;
struct tg3 *tp; struct tg3 *tp;
int i, err, pci_using_dac, pm_cap; int i, err, pm_cap;
char str[40]; char str[40];
u64 dma_mask, persist_dma_mask;
if (tg3_version_printed++ == 0) if (tg3_version_printed++ == 0)
printk(KERN_INFO "%s", version); printk(KERN_INFO "%s", version);
@ -10646,26 +10664,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
goto err_out_free_res; 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_base = pci_resource_start(pdev, 0);
tg3reg_len = pci_resource_len(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_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev); SET_NETDEV_DEV(dev, &pdev->dev);
if (pci_using_dac)
dev->features |= NETIF_F_HIGHDMA;
dev->features |= NETIF_F_LLTX; dev->features |= NETIF_F_LLTX;
#if TG3_VLAN_TAG_USED #if TG3_VLAN_TAG_USED
dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; 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; 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); tg3_init_bufmgr_config(tp);
#if TG3_TSO_SUPPORT != 0 #if TG3_TSO_SUPPORT != 0
@ -10833,9 +10867,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
} else } else
tp->tg3_flags &= ~TG3_FLAG_RX_CHECKSUMS; 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 */ /* flow control autonegotiation is default behavior */
tp->tg3_flags |= TG3_FLAG_PAUSE_AUTONEG; tp->tg3_flags |= TG3_FLAG_PAUSE_AUTONEG;