diff options
| author | Eddie Wai | 2010-11-24 13:48:54 +0000 |
|---|---|---|
| committer | David S. Miller | 2010-11-28 10:47:19 -0800 |
| commit | a5dac108d57072eec4d6745f32c162524509f2cb (patch) | |
| tree | e5177d7c181866ecea357ef1a9c0109d7ca39b90 /drivers/net/bnx2.c | |
| parent | 19eb5cc559f716dc98ce03a5bad6030fdc71e897 (diff) | |
bnx2: Fix reset bug on 5709
The 5709 chip requires the BNX2_MISC_NEW_CORE_CTL_DMA_ENABLE bit to be
cleared and polling for pending DMAs to complete before chip reset.
Without this step, we've seen NMIs during repeated resets of the chip.
Signed-off-by: Eddie Wai <waie@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2.c')
| -rw-r--r-- | drivers/net/bnx2.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 0de196da4d4a..78f91ef44969 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -4640,13 +4640,28 @@ bnx2_reset_chip(struct bnx2 *bp, u32 reset_code) /* Wait for the current PCI transaction to complete before * issuing a reset. */ - REG_WR(bp, BNX2_MISC_ENABLE_CLR_BITS, - BNX2_MISC_ENABLE_CLR_BITS_TX_DMA_ENABLE | - BNX2_MISC_ENABLE_CLR_BITS_DMA_ENGINE_ENABLE | - BNX2_MISC_ENABLE_CLR_BITS_RX_DMA_ENABLE | - BNX2_MISC_ENABLE_CLR_BITS_HOST_COALESCE_ENABLE); - val = REG_RD(bp, BNX2_MISC_ENABLE_CLR_BITS); - udelay(5); + if ((CHIP_NUM(bp) == CHIP_NUM_5706) || + (CHIP_NUM(bp) == CHIP_NUM_5708)) { + REG_WR(bp, BNX2_MISC_ENABLE_CLR_BITS, + BNX2_MISC_ENABLE_CLR_BITS_TX_DMA_ENABLE | + BNX2_MISC_ENABLE_CLR_BITS_DMA_ENGINE_ENABLE | + BNX2_MISC_ENABLE_CLR_BITS_RX_DMA_ENABLE | + BNX2_MISC_ENABLE_CLR_BITS_HOST_COALESCE_ENABLE); + val = REG_RD(bp, BNX2_MISC_ENABLE_CLR_BITS); + udelay(5); + } else { /* 5709 */ + val = REG_RD(bp, BNX2_MISC_NEW_CORE_CTL); + val &= ~BNX2_MISC_NEW_CORE_CTL_DMA_ENABLE; + REG_WR(bp, BNX2_MISC_NEW_CORE_CTL, val); + val = REG_RD(bp, BNX2_MISC_NEW_CORE_CTL); + + for (i = 0; i < 100; i++) { + msleep(1); + val = REG_RD(bp, BNX2_PCICFG_DEVICE_CONTROL); + if (!(val & BNX2_PCICFG_DEVICE_STATUS_NO_PEND)) + break; + } + } /* Wait for the firmware to tell us it is ok to issue a reset. */ bnx2_fw_sync(bp, BNX2_DRV_MSG_DATA_WAIT0 | reset_code, 1, 1); |