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authorKeshavamurthy, Anil S <anil.s.keshavamurthy@intel.com>2007-10-22 03:41:54 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-22 19:13:19 +0400
commit3460a6d9cef9ac2aa997da7eff7ff1c8291b361c (patch)
tree3cf7eb916456d781d2edb135f9069f7c94d10085 /include
parent7d3b03ce7bff9d39ebaee1bb8de1968c4434b883 (diff)
downloadlinux-3460a6d9cef9ac2aa997da7eff7ff1c8291b361c.tar.xz
Intel IOMMU: DMAR fault handling support
MSI interrupt handler registrations and fault handling support for Intel-IOMMU hadrware. This patch enables the MSI interrupts for the DMA remapping units and in the interrupt handler read the fault cause and outputs the same on to the console. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ashok Raj <ashok.raj@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Christoph Lameter <clameter@sgi.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dmar.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 7d683dc8ed1e..ffb6439cb5e6 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -28,6 +28,18 @@
#ifdef CONFIG_DMAR
struct intel_iommu;
+extern char *dmar_get_fault_reason(u8 fault_reason);
+
+/* Can't use the common MSI interrupt functions
+ * since DMAR is not a pci device
+ */
+extern void dmar_msi_unmask(unsigned int irq);
+extern void dmar_msi_mask(unsigned int irq);
+extern void dmar_msi_read(int irq, struct msi_msg *msg);
+extern void dmar_msi_write(int irq, struct msi_msg *msg);
+extern int dmar_set_interrupt(struct intel_iommu *iommu);
+extern int arch_setup_dmar_msi(unsigned int irq);
+
/* Intel IOMMU detection and initialization functions */
extern void detect_intel_iommu(void);
extern int intel_iommu_init(void);