1 /* 2 * Copyright (c) 2006, Intel Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 15 * Place - Suite 330, Boston, MA 02111-1307 USA. 16 * 17 * Copyright (C) Ashok Raj <[email protected]> 18 * Copyright (C) Shaohua Li <[email protected]> 19 */ 20 21 #ifndef __DMAR_H__ 22 #define __DMAR_H__ 23 24 #include <linux/acpi.h> 25 #include <linux/types.h> 26 #include <linux/msi.h> 27 28 #ifdef CONFIG_DMAR 29 struct intel_iommu; 30 31 extern const char *dmar_get_fault_reason(u8 fault_reason); 32 33 /* Can't use the common MSI interrupt functions 34 * since DMAR is not a pci device 35 */ 36 extern void dmar_msi_unmask(unsigned int irq); 37 extern void dmar_msi_mask(unsigned int irq); 38 extern void dmar_msi_read(int irq, struct msi_msg *msg); 39 extern void dmar_msi_write(int irq, struct msi_msg *msg); 40 extern int dmar_set_interrupt(struct intel_iommu *iommu); 41 extern int arch_setup_dmar_msi(unsigned int irq); 42 43 /* Intel IOMMU detection and initialization functions */ 44 extern void detect_intel_iommu(void); 45 extern int intel_iommu_init(void); 46 47 extern int dmar_table_init(void); 48 extern int early_dmar_detect(void); 49 50 extern struct list_head dmar_drhd_units; 51 extern struct list_head dmar_rmrr_units; 52 53 struct dmar_drhd_unit { 54 struct list_head list; /* list of drhd units */ 55 u64 reg_base_addr; /* register base address*/ 56 struct pci_dev **devices; /* target device array */ 57 int devices_cnt; /* target device count */ 58 u8 ignored:1; /* ignore drhd */ 59 u8 include_all:1; 60 struct intel_iommu *iommu; 61 }; 62 63 struct dmar_rmrr_unit { 64 struct list_head list; /* list of rmrr units */ 65 u64 base_address; /* reserved base address*/ 66 u64 end_address; /* reserved end address */ 67 struct pci_dev **devices; /* target devices */ 68 int devices_cnt; /* target device count */ 69 }; 70 71 #define for_each_drhd_unit(drhd) \ 72 list_for_each_entry(drhd, &dmar_drhd_units, list) 73 #define for_each_rmrr_units(rmrr) \ 74 list_for_each_entry(rmrr, &dmar_rmrr_units, list) 75 #else 76 static inline void detect_intel_iommu(void) 77 { 78 return; 79 } 80 static inline int intel_iommu_init(void) 81 { 82 return -ENODEV; 83 } 84 85 #endif /* !CONFIG_DMAR */ 86 #endif /* __DMAR_H__ */ 87