VT-d: parse ATSR in DMA Remapping Reporting Structure

Parse the Root Port ATS Capability Reporting Structure in the DMA
Remapping Reporting Structure ACPI table.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index e397dc342cda..7c9a207e5da6 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -185,6 +185,15 @@ struct dmar_rmrr_unit {
 
 #define for_each_rmrr_units(rmrr) \
         list_for_each_entry(rmrr, &dmar_rmrr_units, list)
+
+struct dmar_atsr_unit {
+        struct list_head list;          /* list of ATSR units */
+        struct acpi_dmar_header *hdr;   /* ACPI header */
+        struct pci_dev **devices;       /* target devices */
+        int devices_cnt;                /* target device count */
+        u8 include_all:1;               /* include all ports */
+};
+
 /* Intel DMAR  initialization functions */
 extern int intel_iommu_init(void);
 #else
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 29e05a034c09..0a1939f200fc 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -331,6 +331,7 @@ static inline void __iommu_flush_cache(
 }
 
 extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
+extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);
 
 extern int alloc_iommu(struct dmar_drhd_unit *drhd);
 extern void free_iommu(struct intel_iommu *iommu);