[coreboot-gerrit] Patch set updated for coreboot: 8853dcf nvidia/ck804: make Message Signaled Interrupts work

[Jonathan A. Kollasch (jakllsch@kollasch.net)]

Jonathan A. Kollasch (jakllsch at kollasch.net) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8276

-gerrit

commit 8853dcfc99e5c8c8dd0b385089b281bcfacf081e
Author: Jonathan A. Kollasch <jakllsch at kollasch.net>
Date:   Sun Jan 25 12:57:43 2015 -0600

    nvidia/ck804: make Message Signaled Interrupts work
    
    Use HT MSI Mapping capability register at 0xe0 in CK804 HT device to enable
    HT MSI Mapping so that MSIs work.  Prior to this change PCIe devices
    downstream of the CK804 with MSI enabled would fail to actually assert
    their interrupt.  Tested on msi/ms7135 and winent/mb6047 running Debian
    GNU/Linux 7.0 (wheezy).
    
    Change-Id: I5e0dc8b352f3d04e3b16b899af11d2b908a82850
    Signed-off-by: Jonathan A. Kollasch <jakllsch at kollasch.net>
---
 src/southbridge/nvidia/ck804/ht.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/southbridge/nvidia/ck804/ht.c b/src/southbridge/nvidia/ck804/ht.c
index 41e2998..f5ea249 100644
--- a/src/southbridge/nvidia/ck804/ht.c
+++ b/src/southbridge/nvidia/ck804/ht.c
@@ -52,11 +52,21 @@ unsigned long acpi_fill_mcfg(unsigned long current)
 
 #endif
 
+static void ht_init(struct device *dev)
+{
+	u32 htmsi;
+
+	/* Enable HT MSI Mapping in capability register */
+	htmsi = pci_read_config32(dev, 0xe0);
+	htmsi |= (1 << 16);
+	pci_write_config32(dev, 0xe0, htmsi);
+}
+
 static struct device_operations ht_ops = {
 	.read_resources   = pci_dev_read_resources,
 	.set_resources    = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init             = 0,
+	.init             = ht_init,
 	.scan_bus         = 0,
 	.ops_pci          = &ck804_pci_ops,
 };