Skip to content

Commit

Permalink
tg3: Prevent corruption at 10 / 100Mbps w CLKREQ
Browse files Browse the repository at this point in the history 
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>
  • Loading branch information
Matt Carlson authored and David S. Miller committed Nov 22, 2008
1 parent 52f4490 commit 5e7dfd0
Show file tree
Hide file tree
Showing 2 changed files with 67 additions and 14 deletions.
77 changes: 63 additions & 14 deletions drivers/net/tg3.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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);
Expand Down Expand Up @@ -2923,6 +2937,24 @@ static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset)
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);
Expand Down Expand Up @@ -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;
Expand All @@ -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);
Expand Down Expand Up @@ -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.
Expand Down Expand Up @@ -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;
Expand Down
4 changes: 4 additions & 0 deletions drivers/net/tg3.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand Down Expand Up @@ -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];
Expand Down

0 comments on commit 5e7dfd0

Please sign in to comment.