Differential D35951 Diff 108685 sys/x86/iommu/intel_dmar.h

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sys/x86/iommu/intel_dmar.h

Show First 20 Lines • Show All 171 Lines • ▼ Show 20 Lines	struct dmar_unit {

/* IR */		/* IR */
int ir_enabled;		int ir_enabled;
vm_paddr_t irt_phys;		vm_paddr_t irt_phys;
dmar_irte_t *irt;		dmar_irte_t *irt;
u_int irte_cnt;		u_int irte_cnt;
vmem_t *irtids;		vmem_t *irtids;

/* Delayed freeing of map entries queue processing */		/*
struct iommu_map_entries_tailq tlb_flush_entries;		* Delayed freeing of map entries queue processing:
		*
		* tlb_flush_head and tlb_flush_tail are used to implement a FIFO
		* queue that supports concurrent dequeues and enqueues. However,
		* there can only be a single dequeuer (accessing tlb_flush_head) and
		* a single enqueuer (accessing tlb_flush_tail) at a time. Since the
		* unit's qi_task is the only dequeuer, it can access tlb_flush_head
		* without any locking. In contrast, there may be multiple enqueuers,
		* so the enqueuers acquire the iommu unit lock to serialize their
		* accesses to tlb_flush_tail.
		*
		* In this FIFO queue implementation, the key to enabling concurrent
		* dequeues and enqueues is that the dequeuer never needs to access
		* tlb_flush_tail and the enqueuer never needs to access
		* tlb_flush_head. In particular, tlb_flush_head and tlb_flush_tail
		* are never NULL, so neither a dequeuer nor an enqueuer ever needs to
		* update both. Instead, tlb_flush_head always points to a "zombie"
		* struct, which previously held the last dequeued item. Thus, the
		* zombie's next field actually points to the struct holding the first
		* item in the queue. When an item is dequeued, the current zombie is
		* finally freed, and the struct that held the just dequeued item
		* becomes the new zombie. When the queue is empty, tlb_flush_tail
		* also points to the zombie.
		*/
		struct iommu_map_entry *tlb_flush_head;
		struct iommu_map_entry *tlb_flush_tail;
struct task qi_task;		struct task qi_task;
struct taskqueue *qi_taskqueue;		struct taskqueue *qi_taskqueue;
};		};

#define DMAR_LOCK(dmar) mtx_lock(&(dmar)->iommu.lock)		#define DMAR_LOCK(dmar) mtx_lock(&(dmar)->iommu.lock)
#define DMAR_UNLOCK(dmar) mtx_unlock(&(dmar)->iommu.lock)		#define DMAR_UNLOCK(dmar) mtx_unlock(&(dmar)->iommu.lock)
#define DMAR_ASSERT_LOCKED(dmar) mtx_assert(&(dmar)->iommu.lock, MA_OWNED)		#define DMAR_ASSERT_LOCKED(dmar) mtx_assert(&(dmar)->iommu.lock, MA_OWNED)

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int dmar_init_fault_log(struct dmar_unit *unit);		int dmar_init_fault_log(struct dmar_unit *unit);
void dmar_fini_fault_log(struct dmar_unit *unit);		void dmar_fini_fault_log(struct dmar_unit *unit);

int dmar_qi_intr(void *arg);		int dmar_qi_intr(void *arg);
void dmar_enable_qi_intr(struct dmar_unit *unit);		void dmar_enable_qi_intr(struct dmar_unit *unit);
void dmar_disable_qi_intr(struct dmar_unit *unit);		void dmar_disable_qi_intr(struct dmar_unit *unit);
int dmar_init_qi(struct dmar_unit *unit);		int dmar_init_qi(struct dmar_unit *unit);
void dmar_fini_qi(struct dmar_unit *unit);		void dmar_fini_qi(struct dmar_unit *unit);
void dmar_qi_invalidate_locked(struct dmar_domain *domain, iommu_gaddr_t start,		void dmar_qi_invalidate_locked(struct dmar_domain *domain,
iommu_gaddr_t size, struct iommu_qi_genseq *psec, bool emit_wait);		struct iommu_map_entry *entry, bool emit_wait);
void dmar_qi_invalidate_sync(struct dmar_domain *domain, iommu_gaddr_t start,		void dmar_qi_invalidate_sync(struct dmar_domain *domain, iommu_gaddr_t start,
iommu_gaddr_t size, bool cansleep);		iommu_gaddr_t size, bool cansleep);
void dmar_qi_invalidate_ctx_glob_locked(struct dmar_unit *unit);		void dmar_qi_invalidate_ctx_glob_locked(struct dmar_unit *unit);
void dmar_qi_invalidate_iotlb_glob_locked(struct dmar_unit *unit);		void dmar_qi_invalidate_iotlb_glob_locked(struct dmar_unit *unit);
void dmar_qi_invalidate_iec_glob(struct dmar_unit *unit);		void dmar_qi_invalidate_iec_glob(struct dmar_unit *unit);
void dmar_qi_invalidate_iec(struct dmar_unit *unit, u_int start, u_int cnt);		void dmar_qi_invalidate_iec(struct dmar_unit *unit, u_int start, u_int cnt);

vm_object_t domain_get_idmap_pgtbl(struct dmar_domain *domain,		vm_object_t domain_get_idmap_pgtbl(struct dmar_domain *domain,
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