diff options
author | Don Skidmore <donald.c.skidmore@intel.com> | 2010-02-10 23:13:49 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-02-16 00:51:56 -0500 |
commit | a626e8478b18de4fdee0e6d13975cea2b23efea5 (patch) | |
tree | 08677003e4990e2df7ac4121e8721dcc7c201b44 /drivers | |
parent | 3d0beb921fa34ebf8b13e206e5473329b14deb83 (diff) |
ixgbe: Fix - Do not allow Rx FC on 82598 at 1G due to errata
The 82598 has an erratum that receipt of pause frames at 1G
could lead to a Tx Hang. To avoid this this patch disables
Rx FC while at 1G speed for all 82598 parts.
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ixgbe/ixgbe_82598.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe_82598.c b/drivers/net/ixgbe/ixgbe_82598.c index 3103f4165311..35a06b47587b 100644 --- a/drivers/net/ixgbe/ixgbe_82598.c +++ b/drivers/net/ixgbe/ixgbe_82598.c | |||
@@ -357,12 +357,34 @@ static s32 ixgbe_fc_enable_82598(struct ixgbe_hw *hw, s32 packetbuf_num) | |||
357 | u32 fctrl_reg; | 357 | u32 fctrl_reg; |
358 | u32 rmcs_reg; | 358 | u32 rmcs_reg; |
359 | u32 reg; | 359 | u32 reg; |
360 | u32 link_speed = 0; | ||
361 | bool link_up; | ||
360 | 362 | ||
361 | #ifdef CONFIG_DCB | 363 | #ifdef CONFIG_DCB |
362 | if (hw->fc.requested_mode == ixgbe_fc_pfc) | 364 | if (hw->fc.requested_mode == ixgbe_fc_pfc) |
363 | goto out; | 365 | goto out; |
364 | 366 | ||
365 | #endif /* CONFIG_DCB */ | 367 | #endif /* CONFIG_DCB */ |
368 | /* | ||
369 | * On 82598 having Rx FC on causes resets while doing 1G | ||
370 | * so if it's on turn it off once we know link_speed. For | ||
371 | * more details see 82598 Specification update. | ||
372 | */ | ||
373 | hw->mac.ops.check_link(hw, &link_speed, &link_up, false); | ||
374 | if (link_up && link_speed == IXGBE_LINK_SPEED_1GB_FULL) { | ||
375 | switch (hw->fc.requested_mode) { | ||
376 | case ixgbe_fc_full: | ||
377 | hw->fc.requested_mode = ixgbe_fc_tx_pause; | ||
378 | break; | ||
379 | case ixgbe_fc_rx_pause: | ||
380 | hw->fc.requested_mode = ixgbe_fc_none; | ||
381 | break; | ||
382 | default: | ||
383 | /* no change */ | ||
384 | break; | ||
385 | } | ||
386 | } | ||
387 | |||
366 | /* Negotiate the fc mode to use */ | 388 | /* Negotiate the fc mode to use */ |
367 | ret_val = ixgbe_fc_autoneg(hw); | 389 | ret_val = ixgbe_fc_autoneg(hw); |
368 | if (ret_val) | 390 | if (ret_val) |