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tg3: Prevent corruption at 10 / 100Mbps w CLKREQ

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This patch disables CLKREQ at 10Mbps and 100Mbps to workaround a TX BD
corruption issue.  This problem only affects the 5784 and 5761 (and
57780 AX) ASIC revisions.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2008-11-21 17:18:16 -08:00 committed by David S. Miller
parent 52f4490c3b
commit 5e7dfd0fb9
2 changed files with 67 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
drivers/net/tg3.c
View File

@ -2154,6 +2154,20 @@ static int tg3_set_power_state(struct tg3 *tp, pci_power_t state)
tp->dev->name, state);
return -EINVAL;
}
/* Restore the CLKREQ setting. */
if (tp->tg3_flags3 & TG3_FLG3_CLKREQ_BUG) {
u16 lnkctl;
pci_read_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_LNKCTL,
&lnkctl);
lnkctl |= PCI_EXP_LNKCTL_CLKREQ_EN;
pci_write_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_LNKCTL,
lnkctl);
}
misc_host_ctrl = tr32(TG3PCI_MISC_HOST_CTRL);
tw32(TG3PCI_MISC_HOST_CTRL,
misc_host_ctrl | MISC_HOST_CTRL_MASK_PCI_INT);
@ -2923,6 +2937,24 @@ relink:
NIC_SRAM_FIRMWARE_MBOX_MAGIC2);
}
/* Prevent send BD corruption. */
if (tp->tg3_flags3 & TG3_FLG3_CLKREQ_BUG) {
u16 oldlnkctl, newlnkctl;
pci_read_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_LNKCTL,
&oldlnkctl);
if (tp->link_config.active_speed == SPEED_100 ||
tp->link_config.active_speed == SPEED_10)
newlnkctl = oldlnkctl & ~PCI_EXP_LNKCTL_CLKREQ_EN;
else
newlnkctl = oldlnkctl | PCI_EXP_LNKCTL_CLKREQ_EN;
if (newlnkctl != oldlnkctl)
pci_write_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_LNKCTL,
newlnkctl);
}
if (current_link_up != netif_carrier_ok(tp->dev)) {
if (current_link_up)
netif_carrier_on(tp->dev);
@ -6016,7 +6048,7 @@ static int tg3_chip_reset(struct tg3 *tp)
udelay(120);
if (tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) {
if ((tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) && tp->pcie_cap) {
if (tp->pci_chip_rev_id == CHIPREV_ID_5750_A0) {
int i;
u32 cfg_val;
@ -6029,9 +6061,23 @@ static int tg3_chip_reset(struct tg3 *tp)
pci_write_config_dword(tp->pdev, 0xc4,
cfg_val | (1 << 15));
}
if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785)
/* Set PCIE max payload size and clear error status. */
pci_write_config_dword(tp->pdev, 0xd8, 0xf5000);
/* Set PCIE max payload size to 128 bytes and
* clear the "no snoop" and "relaxed ordering" bits.
*/
pci_write_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_DEVCTL,
0);
pcie_set_readrq(tp->pdev, 4096);
/* Clear error status */
pci_write_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_DEVSTA,
PCI_EXP_DEVSTA_CED |
PCI_EXP_DEVSTA_NFED |
PCI_EXP_DEVSTA_FED |
PCI_EXP_DEVSTA_URD);
}
tg3_restore_pci_state(tp);
@ -11967,7 +12013,7 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
u32 pci_state_reg, grc_misc_cfg;
u32 val;
u16 pci_cmd;
int err, pcie_cap;
int err;
/* Force memory write invalidate off. If we leave it on,
* then on 5700_BX chips we have to enable a workaround.
@ -12193,20 +12239,23 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
pci_read_config_dword(tp->pdev, TG3PCI_PCISTATE,
&pci_state_reg);
pcie_cap = pci_find_capability(tp->pdev, PCI_CAP_ID_EXP);
if (pcie_cap != 0) {
tp->pcie_cap = pci_find_capability(tp->pdev, PCI_CAP_ID_EXP);
if (tp->pcie_cap != 0) {
u16 lnkctl;
tp->tg3_flags2 |= TG3_FLG2_PCI_EXPRESS;
pcie_set_readrq(tp->pdev, 4096);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) {
u16 lnkctl;
pci_read_config_word(tp->pdev,
pcie_cap + PCI_EXP_LNKCTL,
&lnkctl);
if (lnkctl & PCI_EXP_LNKCTL_CLKREQ_EN)
pci_read_config_word(tp->pdev,
tp->pcie_cap + PCI_EXP_LNKCTL,
&lnkctl);
if (lnkctl & PCI_EXP_LNKCTL_CLKREQ_EN) {
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
tp->tg3_flags2 &= ~TG3_FLG2_HW_TSO_2;
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761)
tp->tg3_flags3 |= TG3_FLG3_CLKREQ_BUG;
}
} else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785) {
tp->tg3_flags2 |= TG3_FLG2_PCI_EXPRESS;

4
drivers/net/tg3.h
View File

@ -2618,6 +2618,7 @@ struct tg3 {
#define TG3_FLG3_RGMII_STD_IBND_DISABLE 0x00000100
#define TG3_FLG3_RGMII_EXT_IBND_RX_EN 0x00000200
#define TG3_FLG3_RGMII_EXT_IBND_TX_EN 0x00000400
#define TG3_FLG3_CLKREQ_BUG 0x00000800
struct timer_list timer;
u16 timer_counter;
@ -2656,7 +2657,10 @@ struct tg3 {
int pm_cap;
int msi_cap;
union {
int pcix_cap;
int pcie_cap;
};
struct mii_bus *mdio_bus;
int mdio_irq[PHY_MAX_ADDR];