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authorFenghua Yu <fenghua.yu@intel.com>2009-03-27 14:22:42 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-04-03 21:45:54 +0100
commitf59c7b69bcba31cd355ababe067202b9895d6102 (patch)
tree4f06ceb6ab9a135acd9b316c806aaa99c097b373 /include
parent8f912ba4d7cdaf7d31cf39fe5a9b7732308a256d (diff)
downloadop-kernel-dev-f59c7b69bcba31cd355ababe067202b9895d6102.zip
op-kernel-dev-f59c7b69bcba31cd355ababe067202b9895d6102.tar.gz
Intel IOMMU Suspend/Resume Support - DMAR
This patch implements the suspend and resume feature for Intel IOMMU DMAR. It hooks to kernel suspend and resume interface. When suspend happens, it saves necessary hardware registers. When resume happens, it restores the registers and restarts IOMMU by enabling translation, setting up root entry, and re-enabling queued invalidation. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/intel-iommu.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 77214ea..3771cd1 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -284,6 +284,14 @@ struct iommu_flush {
unsigned int size_order, u64 type, int non_present_entry_flush);
};
+enum {
+ SR_DMAR_FECTL_REG,
+ SR_DMAR_FEDATA_REG,
+ SR_DMAR_FEADDR_REG,
+ SR_DMAR_FEUADDR_REG,
+ MAX_SR_DMAR_REGS
+};
+
struct intel_iommu {
void __iomem *reg; /* Pointer to hardware regs, virtual addr */
u64 cap;
@@ -304,6 +312,8 @@ struct intel_iommu {
struct iommu_flush flush;
#endif
struct q_inval *qi; /* Queued invalidation info */
+ u32 *iommu_state; /* Store iommu states between suspend and resume.*/
+
#ifdef CONFIG_INTR_REMAP
struct ir_table *ir_table; /* Interrupt remapping info */
#endif
@@ -322,6 +332,7 @@ extern int alloc_iommu(struct dmar_drhd_unit *drhd);
extern void free_iommu(struct intel_iommu *iommu);
extern int dmar_enable_qi(struct intel_iommu *iommu);
extern void dmar_disable_qi(struct intel_iommu *iommu);
+extern int dmar_reenable_qi(struct intel_iommu *iommu);
extern void qi_global_iec(struct intel_iommu *iommu);
extern int qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
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