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netxen: improve msi support

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Recent netxen firmware has new scheme of generating MSI interrupts, it
raises interrupt and blocks itself, waiting for driver to unmask. This
reduces chance of spurious interrupts.

The driver will be able to deal with older firmware as well.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Tested-by: Vernon Mauery <mauery@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Dhananjay Phadke
2008-03-17 19:59:48 -07:00
committed by Jeff Garzik
parent 9e6db60825
commit 443be7960b
6 changed files with 43 additions and 33 deletions
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2
drivers/net/netxen/netxen_nic_init.c
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@@ -145,6 +145,8 @@ int netxen_init_firmware(struct netxen_adapter *adapter)
/* Window 1 call */
writel(INTR_SCHEME_PERPORT,
NETXEN_CRB_NORMALIZE(adapter, CRB_NIC_CAPABILITIES_HOST));
writel(MSI_MODE_MULTIFUNC,
NETXEN_CRB_NORMALIZE(adapter, CRB_NIC_MSI_MODE_HOST));
writel(MPORT_MULTI_FUNCTION_MODE,
NETXEN_CRB_NORMALIZE(adapter, CRB_MPORT_MODE));
writel(PHAN_INITIALIZE_ACK,