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PCI: quirk: enable MSI Mapping on HT1000
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Add a quirk to enable the MSI mapping capability on HyperTransport bridges.

Wire Broadcom's HT1000 to use the quirk.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andy Currid <acurrid@nvidia.com>
Cc: Peer Chen <pchen@nvidia.com>
Cc: Prakash Punnoor <prakash@punnoor.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michael Chan <mchan@broadcom.com>
Cc: Greg KH <greg@kroah.com>
Cc: Andy Currid <acurrid@nvidia.com>
Cc: Peer Chen <pchen@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Sebastien Dugue authored and Greg Kroah-Hartman committed Feb 1, 2008
1 parent 6015fbe commit 6bae1d9
Showing 1 changed file with 27 additions and 3 deletions.
30 changes: 27 additions & 3 deletions drivers/pci/quirks.c
Original file line number Diff line number Diff line change
Expand Up @@ -1711,9 +1711,33 @@ static void __devinit quirk_msi_ht_cap(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
quirk_msi_ht_cap);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_HT1000_PXB,
quirk_msi_ht_cap);


/*
* Force enable MSI mapping capability on HT bridges
*/
static void __devinit quirk_msi_ht_cap_enable(struct pci_dev *dev)
{
int pos, ttl = 48;

pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
while (pos && ttl--) {
u8 flags;

if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS, &flags) == 0) {
printk(KERN_INFO "PCI: Enabling HT MSI Mapping on %s\n",
pci_name(dev));

pci_write_config_byte(dev, pos + HT_MSI_FLAGS,
flags | HT_MSI_FLAGS_ENABLE);
}
pos = pci_find_next_ht_capability(dev, pos,
HT_CAPTYPE_MSI_MAPPING);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_HT1000_PXB,
quirk_msi_ht_cap_enable);

/* The nVidia CK804 chipset may have 2 HT MSI mappings.
* MSI are supported if the MSI capability set in any of these mappings.
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