From: "Kok, Auke" <auke-jan.h.kok@intel.com>
To: "Garzik, Jeff" <jgarzik@pobox.com>
Cc: netdev@vger.kernel.org, "Brandeburg,
Jesse" <jesse.brandeburg@intel.com>,
"Kok, Auke" <auke-jan.h.kok@intel.com>,
"Kok, Auke" <auke@foo-projects.org>,
"Ronciak, John" <john.ronciak@intel.com>
Subject: [PATCH 05/18] e1000: add mmiowb() for IA64 to sync tail writes
Date: Wed, 01 Nov 2006 09:51:39 -0800 [thread overview]
Message-ID: <20061101175139.2356.14656.stgit@gitlost.site> (raw)
In-Reply-To: <20061101175043.2356.13659.stgit@gitlost.site>
IA64 SMP systems were seeing TX issues with multiple cpu's attempting
to write tail registers unordered. This mmiowb() fixes the issue.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
---
drivers/net/e1000/e1000_main.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 194a07d..54e384b 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2867,6 +2867,9 @@ e1000_tx_queue(struct e1000_adapter *ada
tx_ring->next_to_use = i;
writel(i, adapter->hw.hw_addr + tx_ring->tdt);
+ /* we need this if more than one processor can write to our tail
+ * at a time, it syncronizes IO on IA64/Altix systems */
+ mmiowb();
}
/**
---
Auke Kok <auke-jan.h.kok@intel.com>
next prev parent reply other threads:[~2006-11-01 17:44 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-01 17:50 [PATCH 00/18] e1000: features, updates, documentation Kok, Auke
2006-11-01 17:51 ` [PATCH 01/18] e1000: whitespace changes, comments, typos Kok, Auke
2006-11-01 17:51 ` [PATCH 02/18] e1000: Remove DISABLE_MULR debug code Kok, Auke
2006-11-01 17:51 ` [PATCH 03/18] e1000: FIX: enable hw TSO for IPV6 Kok, Auke
2006-11-01 17:51 ` [PATCH 04/18] e1000: Enble early receive (ERT) on 82573 Kok, Auke
2006-11-01 17:51 ` Kok, Auke [this message]
2006-11-01 17:51 ` [PATCH 06/18] e1000: fix VR powerdown code Kok, Auke
2006-11-01 17:51 ` [PATCH 07/18] e1000: reorder pci-e infor struct Kok, Auke
2006-11-01 17:51 ` [PATCH 08/18] e1000: simplify skb_put call Kok, Auke
2006-11-01 17:51 ` [PATCH 09/18] e1000: Remove unneeded and unwanted memsets Kok, Auke
2006-11-01 17:51 ` [PATCH 10/18] e1000: New hardware support Kok, Auke
2006-11-01 17:51 ` [PATCH 11/18] e1000: add queue restart counter Kok, Auke
2006-11-01 17:51 ` [PATCH 12/18] e1000: rename ICH8 flash macros Kok, Auke
2006-11-01 17:51 ` [PATCH 13/18] e1000: Only set IDE for tx when we are using TIDV/TADV Kok, Auke
2006-11-01 17:52 ` [PATCH 14/18] e1000: reorder e1000_param.c Kok, Auke
2006-11-01 17:52 ` [PATCH 15/18] e1000: add dynamic generic MSI interrupt routine Kok, Auke
2006-11-01 17:52 ` [PATCH 16/18] e1000: add dynamic itr modes Kok, Auke
2006-11-01 17:52 ` [PATCH 17/18] e1000: increment version to 7.3.15-k2 Kok, Auke
2006-11-01 17:52 ` [PATCH 18/18] e1000: update README for e1000 Kok, Auke
2006-11-06 8:08 ` [PATCH 00/18] e1000: features, updates, documentation Jeff Garzik
2006-11-06 15:23 ` Auke Kok
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