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-rw-r--r--include/linux/dmar.h232
1 files changed, 232 insertions, 0 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
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index 000000000..30624954d
--- /dev/null
+++ b/include/linux/dmar.h
@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2006, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Copyright (C) Ashok Raj <ashok.raj@intel.com>
+ * Copyright (C) Shaohua Li <shaohua.li@intel.com>
+ */
+
+#ifndef __DMAR_H__
+#define __DMAR_H__
+
+#include <linux/acpi.h>
+#include <linux/types.h>
+#include <linux/msi.h>
+#include <linux/irqreturn.h>
+#include <linux/rwsem.h>
+#include <linux/rcupdate.h>
+
+struct acpi_dmar_header;
+
+#ifdef CONFIG_X86
+# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
+#else
+# define DMAR_UNITS_SUPPORTED 64
+#endif
+
+/* DMAR Flags */
+#define DMAR_INTR_REMAP 0x1
+#define DMAR_X2APIC_OPT_OUT 0x2
+
+struct intel_iommu;
+
+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 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_pci_path {
+ u8 bus;
+ u8 device;
+ u8 function;
+};
+
+struct dmar_pci_notify_info {
+ struct pci_dev *dev;
+ unsigned long event;
+ int bus;
+ u16 seg;
+ u16 level;
+ struct 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_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);
+extern int dmar_device_add(acpi_handle handle);
+extern int dmar_device_remove(acpi_handle handle);
+
+static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
+{
+ return 0;
+}
+
+#ifdef CONFIG_INTEL_IOMMU
+extern int iommu_detected, no_iommu;
+extern int intel_iommu_init(void);
+extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
+extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
+extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
+extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
+extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
+extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
+#else /* !CONFIG_INTEL_IOMMU: */
+static inline int intel_iommu_init(void) { return -ENODEV; }
+
+#define dmar_parse_one_rmrr dmar_res_noop
+#define dmar_parse_one_atsr dmar_res_noop
+#define dmar_check_one_atsr dmar_res_noop
+#define dmar_release_one_atsr dmar_res_noop
+
+static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
+{
+ return 0;
+}
+
+static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
+{
+ return 0;
+}
+#endif /* CONFIG_INTEL_IOMMU */
+
+#ifdef CONFIG_IRQ_REMAP
+extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
+#else /* CONFIG_IRQ_REMAP */
+static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
+{ return 0; }
+#endif /* CONFIG_IRQ_REMAP */
+
+#else /* CONFIG_DMAR_TABLE */
+
+static inline int dmar_device_add(void *handle)
+{
+ return 0;
+}
+
+static inline int dmar_device_remove(void *handle)
+{
+ return 0;
+}
+
+#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);
+
+#endif /* __DMAR_H__ */
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