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-rw-r--r--include/linux/dmar.h188
1 files changed, 152 insertions, 36 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 56c73b84755..23c8db12956 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -24,63 +24,179 @@
#include <linux/acpi.h>
#include <linux/types.h>
#include <linux/msi.h>
+#include <linux/irqreturn.h>
+#include <linux/rwsem.h>
+#include <linux/rcupdate.h>
-#ifdef CONFIG_DMAR
-struct intel_iommu;
-
-extern const 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);
+struct acpi_dmar_header;
-/* Intel IOMMU detection and initialization functions */
-extern void detect_intel_iommu(void);
-extern int intel_iommu_init(void);
+/* DMAR Flags */
+#define DMAR_INTR_REMAP 0x1
+#define DMAR_X2APIC_OPT_OUT 0x2
-extern int dmar_table_init(void);
-extern int early_dmar_detect(void);
+struct intel_iommu;
-extern struct list_head dmar_drhd_units;
-extern struct list_head dmar_rmrr_units;
+struct dmar_dev_scope {
+ struct device __rcu *dev;
+ u8 bus;
+ u8 devfn;
+};
+#ifdef CONFIG_DMAR_TABLE
+extern struct acpi_table_header *dmar_tbl;
struct dmar_drhd_unit {
struct list_head list; /* list of drhd units */
+ struct acpi_dmar_header *hdr; /* ACPI header */
u64 reg_base_addr; /* register base address*/
- struct pci_dev **devices; /* target device array */
+ struct dmar_dev_scope *devices;/* target device array */
int devices_cnt; /* target device count */
+ u16 segment; /* PCI domain */
u8 ignored:1; /* ignore drhd */
u8 include_all:1;
struct intel_iommu *iommu;
};
-struct dmar_rmrr_unit {
- struct list_head list; /* list of rmrr units */
- u64 base_address; /* reserved base address*/
- u64 end_address; /* reserved end address */
- struct pci_dev **devices; /* target devices */
- int devices_cnt; /* target device count */
-};
+struct dmar_pci_notify_info {
+ struct pci_dev *dev;
+ unsigned long event;
+ int bus;
+ u16 seg;
+ u16 level;
+ struct acpi_dmar_pci_path path[];
+} __attribute__((packed));
+
+extern struct rw_semaphore dmar_global_lock;
+extern struct list_head dmar_drhd_units;
#define for_each_drhd_unit(drhd) \
- list_for_each_entry(drhd, &dmar_drhd_units, list)
-#define for_each_rmrr_units(rmrr) \
- list_for_each_entry(rmrr, &dmar_rmrr_units, list)
+ list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
+
+#define for_each_active_drhd_unit(drhd) \
+ list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
+ if (drhd->ignored) {} else
+
+#define for_each_active_iommu(i, drhd) \
+ list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
+ if (i=drhd->iommu, drhd->ignored) {} else
+
+#define for_each_iommu(i, drhd) \
+ list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
+ if (i=drhd->iommu, 0) {} else
+
+static inline bool dmar_rcu_check(void)
+{
+ return rwsem_is_locked(&dmar_global_lock) ||
+ system_state == SYSTEM_BOOTING;
+}
+
+#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
+
+#define for_each_dev_scope(a, c, p, d) \
+ for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
+ NULL, (p) < (c)); (p)++)
+
+#define for_each_active_dev_scope(a, c, p, d) \
+ for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
+
+extern int dmar_table_init(void);
+extern int dmar_dev_scope_init(void);
+extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
+ struct dmar_dev_scope **devices, u16 segment);
+extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
+extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
+extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
+ void *start, void*end, u16 segment,
+ struct dmar_dev_scope *devices,
+ int devices_cnt);
+extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
+ u16 segment, struct dmar_dev_scope *devices,
+ int count);
+/* Intel IOMMU detection */
+extern int detect_intel_iommu(void);
+extern int enable_drhd_fault_handling(void);
#else
-static inline void detect_intel_iommu(void)
+struct dmar_pci_notify_info;
+static inline int detect_intel_iommu(void)
{
- return;
+ return -ENODEV;
}
-static inline int intel_iommu_init(void)
+
+static inline int dmar_table_init(void)
{
return -ENODEV;
}
+static inline int enable_drhd_fault_handling(void)
+{
+ return -1;
+}
+#endif /* !CONFIG_DMAR_TABLE */
+
+struct irte {
+ union {
+ struct {
+ __u64 present : 1,
+ fpd : 1,
+ dst_mode : 1,
+ redir_hint : 1,
+ trigger_mode : 1,
+ dlvry_mode : 3,
+ avail : 4,
+ __reserved_1 : 4,
+ vector : 8,
+ __reserved_2 : 8,
+ dest_id : 32;
+ };
+ __u64 low;
+ };
+
+ union {
+ struct {
+ __u64 sid : 16,
+ sq : 2,
+ svt : 2,
+ __reserved_3 : 44;
+ };
+ __u64 high;
+ };
+};
+
+enum {
+ IRQ_REMAP_XAPIC_MODE,
+ IRQ_REMAP_X2APIC_MODE,
+};
+
+/* Can't use the common MSI interrupt functions
+ * since DMAR is not a pci device
+ */
+struct irq_data;
+extern void dmar_msi_unmask(struct irq_data *data);
+extern void dmar_msi_mask(struct irq_data *data);
+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 irqreturn_t dmar_fault(int irq, void *dev_id);
+extern int arch_setup_dmar_msi(unsigned int irq);
+
+#ifdef CONFIG_INTEL_IOMMU
+extern int iommu_detected, no_iommu;
+extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
+extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
+extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
+extern int intel_iommu_init(void);
+#else /* !CONFIG_INTEL_IOMMU: */
+static inline int intel_iommu_init(void) { return -ENODEV; }
+static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
+{
+ return 0;
+}
+static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
+{
+ return 0;
+}
+static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
+{
+ return 0;
+}
+#endif /* CONFIG_INTEL_IOMMU */
-#endif /* !CONFIG_DMAR */
#endif /* __DMAR_H__ */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 05:32:05 +0000