linux_dsm_epyc7002/drivers/net/ethernet/intel
Bruce Allan e08f626b33 e1000e: workaround DMA unit hang on I218
At 1000Mbps link speed, one of the MAC's internal clocks can be stopped for
up to 4us when entering K1 (a power mode of the MAC-PHY interconnect).  If
the MAC is waiting for completion indications for 2 DMA write requests into
Host memory (e.g. descriptor writeback or Rx packet writing) and the
indications occur while the clock is stopped, both indications will be
missed by the MAC causing the MAC to wait for the completion indications
and be unable to generate further DMA write requests.  This results in an
apparent hardware hang.

Work-around the issue by disabling the de-assertion of the clock request
when 1000Mbps link is acquired (K1 must be disabled while doing this).

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2013-03-05 01:01:43 -08:00
..
e1000 e1000: fix whitespace issues and multi-line comments 2013-02-15 21:46:37 -08:00
e1000e e1000e: workaround DMA unit hang on I218 2013-03-05 01:01:43 -08:00
igb igb: increase timeout for ethtool offline self-test 2013-02-15 21:46:54 -08:00
igbvf igbvf: Make next_to_watch a pointer and adjust memory barriers to avoid races 2013-02-15 21:46:51 -08:00
ixgb drivers: net: Remove remaining alloc/OOM messages 2013-02-08 17:44:39 -05:00
ixgbe ixgbe: Update DESC_NEEDED define to adjust for changes to MAX_SKB_FRAGS 2013-02-15 23:59:32 -08:00
ixgbevf ixgbevf: Make sure link status and speed are fetched 2013-01-28 00:19:52 -08:00
e100.c remove init of dev->perm_addr in drivers 2013-01-08 18:00:48 -08:00
Kconfig Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
Makefile