Patchwork [net-next-2.6] enic: Always use single transmit and single receive hardware queues per device

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Submitter Vasanthy Kolluri
Date Feb. 17, 2011, 11:57 p.m.
Message ID <20110217235719.6978.78272.stgit@savbu-pc100.cisco.com>
Download mbox | patch
Permalink /patch/83510/
State Accepted
Delegated to: David Miller
Headers show

Comments

Vasanthy Kolluri - Feb. 17, 2011, 11:57 p.m.
From: Vasanthy Kolluri <vkolluri@cisco.com>

We believe that our earlier patch for supporting multiple hardware receive queues per enic device requires more internal testing. At this point, we think that it's best to disable the use of multiple receive queues. The current patch provides an effective means for the same.

Also, we continue to disallow multiple hardware transmit queues per device. But change the way we enforce this in order to maintain consistency with the way receive queues are handled.

Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Danny Guo <dannguo@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David Wang <dwang2@cisco.com>
---
 drivers/net/enic/enic.h      |    6 +++---
 drivers/net/enic/enic_main.c |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)



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David Miller - Feb. 18, 2011, 12:13 a.m.
From: Vasanthy Kolluri <vkolluri@cisco.com>
Date: Thu, 17 Feb 2011 15:57:19 -0800

> From: Vasanthy Kolluri <vkolluri@cisco.com>
> 
> We believe that our earlier patch for supporting multiple hardware receive queues per enic device requires more internal testing. At this point, we think that it's best to disable the use of multiple receive queues. The current patch provides an effective means for the same.
> 
> Also, we continue to disallow multiple hardware transmit queues per device. But change the way we enforce this in order to maintain consistency with the way receive queues are handled.
> 
> Signed-off-by: Christian Benvenuti <benve@cisco.com>
> Signed-off-by: Danny Guo <dannguo@cisco.com>
> Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
> Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
> Signed-off-by: David Wang <dwang2@cisco.com>

Applied.
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Patch

diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 2ac891b..aee5256 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -32,13 +32,13 @@ 
 
 #define DRV_NAME		"enic"
 #define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"
-#define DRV_VERSION		"2.1.1.8"
+#define DRV_VERSION		"2.1.1.9"
 #define DRV_COPYRIGHT		"Copyright 2008-2011 Cisco Systems, Inc"
 
 #define ENIC_BARS_MAX		6
 
-#define ENIC_WQ_MAX		8
-#define ENIC_RQ_MAX		8
+#define ENIC_WQ_MAX		1
+#define ENIC_RQ_MAX		1
 #define ENIC_CQ_MAX		(ENIC_WQ_MAX + ENIC_RQ_MAX)
 #define ENIC_INTR_MAX		(ENIC_CQ_MAX + 2)
 
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index d1aa807..4f1710e 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -2080,7 +2080,7 @@  static void enic_reset(struct work_struct *work)
 static int enic_set_intr_mode(struct enic *enic)
 {
 	unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
-	unsigned int m = 1;
+	unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
 	unsigned int i;
 
 	/* Set interrupt mode (INTx, MSI, MSI-X) depending