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iommu/vt-d: Implement page request handling

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Largely based on the driver-mode implementation by Jesse Barnes.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse
2015-10-07 23:35:18 +01:00
parent 1208225cf4
commit a222a7f0bb
3 changed files with 220 additions and 1 deletions
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26
include/linux/intel-iommu.h
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@@ -265,6 +265,8 @@ enum {
#define QI_EIOTLB_TYPE 0x6
#define QI_PC_TYPE 0x7
#define QI_DEIOTLB_TYPE 0x8
#define QI_PGRP_RESP_TYPE 0x9
#define QI_PSTRM_RESP_TYPE 0xa
#define QI_IEC_SELECTIVE (((u64)1) << 4)
#define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32))
@@ -315,6 +317,25 @@ enum {
#define QI_DEV_EIOTLB_QDEP(qd) (((qd) & 0x1f) << 16)
#define QI_DEV_EIOTLB_MAX_INVS 32
#define QI_PGRP_IDX(idx) (((u64)(idx)) << 55)
#define QI_PGRP_PRIV(priv) (((u64)(priv)) << 32)
#define QI_PGRP_RESP_CODE(res) ((u64)(res))
#define QI_PGRP_PASID(pasid) (((u64)(pasid)) << 32)
#define QI_PGRP_DID(did) (((u64)(did)) << 16)
#define QI_PGRP_PASID_P(p) (((u64)(p)) << 4)
#define QI_PSTRM_ADDR(addr) (((u64)(addr)) & VTD_PAGE_MASK)
#define QI_PSTRM_DEVFN(devfn) (((u64)(devfn)) << 4)
#define QI_PSTRM_RESP_CODE(res) ((u64)(res))
#define QI_PSTRM_IDX(idx) (((u64)(idx)) << 55)
#define QI_PSTRM_PRIV(priv) (((u64)(priv)) << 32)
#define QI_PSTRM_BUS(bus) (((u64)(bus)) << 24)
#define QI_PSTRM_PASID(pasid) (((u64)(pasid)) << 4)
#define QI_RESP_SUCCESS 0x0
#define QI_RESP_INVALID 0x1
#define QI_RESP_FAILURE 0xf
#define QI_GRAN_ALL_ALL 0
#define QI_GRAN_NONG_ALL 1
#define QI_GRAN_NONG_PASID 2
@@ -369,6 +390,7 @@ enum {
struct pasid_entry;
struct pasid_state_entry;
struct page_req_dsc;
struct intel_iommu {
void __iomem *reg; /* Pointer to hardware regs, virtual addr */
@@ -401,6 +423,8 @@ struct intel_iommu {
* told to. But while it's all driver-arbitrated, we're fine. */
struct pasid_entry *pasid_table;
struct pasid_state_entry *pasid_state_table;
struct page_req_dsc *prq;
unsigned char prq_name[16]; /* Name for PRQ interrupt */
struct idr pasid_idr;
#endif
struct q_inval *qi; /* Queued invalidation info */
@@ -445,6 +469,8 @@ extern int dmar_ir_support(void);
#ifdef CONFIG_INTEL_IOMMU_SVM
extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu);
extern int intel_svm_free_pasid_tables(struct intel_iommu *iommu);
extern int intel_svm_enable_prq(struct intel_iommu *iommu);
extern int intel_svm_finish_prq(struct intel_iommu *iommu);
struct intel_svm_dev {
struct list_head list;