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sfc: Do not reinitialise XAUI serdes before it has completed reset

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falcon_reset_xaui() waits for XGXS reset to complete, but the XAUI
serdes reset may take longer.  It needs to check both reset active
bits.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2009-08-26 08:16:46 +00:00 committed by David S. Miller
parent aed0628dae
commit d4ec09acdb
2 changed files with 7 additions and 3 deletions
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2
drivers/net/sfc/falcon_hwdefs.h
View file

@ -700,6 +700,8 @@
/* XGXS/XAUI powerdown/reset register */
#define XX_PWR_RST_REG 0x1300
#define XX_SD_RST_ACT_LBN 16
#define XX_SD_RST_ACT_WIDTH 1
#define XX_PWRDND_EN_LBN 15
#define XX_PWRDND_EN_WIDTH 1
#define XX_PWRDNC_EN_LBN 14

8
drivers/net/sfc/falcon_xmac.c
View file

@ -64,13 +64,15 @@ int falcon_reset_xaui(struct efx_nic *efx)
efx_oword_t reg;
int count;
/* Start reset sequence */
EFX_POPULATE_DWORD_1(reg, XX_RST_XX_EN, 1);
falcon_write(efx, &reg, XX_PWR_RST_REG);
/* Give some time for the link to establish */
for (count = 0; count < 1000; count++) { /* wait upto 10ms */
/* Wait up to 10 ms for completion, then reinitialise */
for (count = 0; count < 1000; count++) {
falcon_read(efx, &reg, XX_PWR_RST_REG);
if (EFX_OWORD_FIELD(reg, XX_RST_XX_EN) == 0) {
if (EFX_OWORD_FIELD(reg, XX_RST_XX_EN) == 0 &&
EFX_OWORD_FIELD(reg, XX_SD_RST_ACT) == 0) {
falcon_setup_xaui(efx);
return 0;
}