Author: zbb
Date: Tue Jul 21 17:14:24 2015
New Revision: 285758
URL: https://svnweb.freebsd.org/changeset/base/285758
Log:
Add some more explanation to r285752
Add brief commentary to vendor-specific devid function in ITS
and remove redundant spaces by the way.
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/arm64/arm64/gic_v3_its.c
Modified: head/sys/arm64/arm64/gic_v3_its.c
==============================================================================
--- head/sys/arm64/arm64/gic_v3_its.c Tue Jul 21 16:53:45 2015
(r285757)
+++ head/sys/arm64/arm64/gic_v3_its.c Tue Jul 21 17:14:24 2015
(r285758)
@@ -1423,20 +1423,24 @@ its_get_devid_thunder(device_t pci_dev)
bsf);
/* PEM otherwise */
} else {
- /* PEM number is equal to domain */
+ /* PEM (PCIe MAC/root complex) number is equal to domain */
pem = pci_get_domain(pci_dev);
- /* Hardcode appropriate PEM numbers */
- if (pem < 3 )
+ /*
+ * Set appropriate device ID (passed by the HW along with
+ * the transaction to memory) for different root complex
+ * numbers using hard-coded domain portion for each group.
+ */
+ if (pem < 3)
return ((0x1 << PCI_RID_DOMAIN_SHIFT) | bsf);
- if (pem < 6 )
+ if (pem < 6)
return ((0x3 << PCI_RID_DOMAIN_SHIFT) | bsf);
- if (pem < 9 )
+ if (pem < 9)
return ((0x9 << PCI_RID_DOMAIN_SHIFT) | bsf);
- if (pem < 12 )
+ if (pem < 12)
return ((0xB << PCI_RID_DOMAIN_SHIFT) | bsf);
}
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