/* * Copyright (C) 2007-2009 Advanced Micro Devices, Inc. * Author: Joerg Roedel * Leo Duran * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * This program is distributed in the hope that 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 */ #ifndef _ASM_X86_AMD_IOMMU_TYPES_H #define _ASM_X86_AMD_IOMMU_TYPES_H #include #include #include /* * Maximum number of IOMMUs supported */ #define MAX_IOMMUS 32 /* * some size calculation constants */ #define DEV_TABLE_ENTRY_SIZE 32 #define ALIAS_TABLE_ENTRY_SIZE 2 #define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *)) /* Length of the MMIO region for the AMD IOMMU */ #define MMIO_REGION_LENGTH 0x4000 /* Capability offsets used by the driver */ #define MMIO_CAP_HDR_OFFSET 0x00 #define MMIO_RANGE_OFFSET 0x0c #define MMIO_MISC_OFFSET 0x10 /* Masks, shifts and macros to parse the device range capability */ #define MMIO_RANGE_LD_MASK 0xff000000 #define MMIO_RANGE_FD_MASK 0x00ff0000 #define MMIO_RANGE_BUS_MASK 0x0000ff00 #define MMIO_RANGE_LD_SHIFT 24 #define MMIO_RANGE_FD_SHIFT 16 #define MMIO_RANGE_BUS_SHIFT 8 #define MMIO_GET_LD(x) (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT) #define MMIO_GET_FD(x) (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT) #define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT) #define MMIO_MSI_NUM(x) ((x) & 0x1f) /* Flag masks for the AMD IOMMU exclusion range */ #define MMIO_EXCL_ENABLE_MASK 0x01ULL #define MMIO_EXCL_ALLOW_MASK 0x02ULL /* Used offsets into the MMIO space */ #define MMIO_DEV_TABLE_OFFSET 0x0000 #define MMIO_CMD_BUF_OFFSET 0x0008 #define MMIO_EVT_BUF_OFFSET 0x0010 #define MMIO_CONTROL_OFFSET 0x0018 #define MMIO_EXCL_BASE_OFFSET 0x0020 #define MMIO_EXCL_LIMIT_OFFSET 0x0028 #define MMIO_CMD_HEAD_OFFSET 0x2000 #define MMIO_CMD_TAIL_OFFSET 0x2008 #define MMIO_EVT_HEAD_OFFSET 0x2010 #define MMIO_EVT_TAIL_OFFSET 0x2018 #define MMIO_STATUS_OFFSET 0x2020 /* MMIO status bits */ #define MMIO_STATUS_COM_WAIT_INT_MASK 0x04 /* event logging constants */ #define EVENT_ENTRY_SIZE 0x10 #define EVENT_TYPE_SHIFT 28 #define EVENT_TYPE_MASK 0xf #define EVENT_TYPE_ILL_DEV 0x1 #define EVENT_TYPE_IO_FAULT 0x2 #define EVENT_TYPE_DEV_TAB_ERR 0x3 #define EVENT_TYPE_PAGE_TAB_ERR 0x4 #define EVENT_TYPE_ILL_CMD 0x5 #define EVENT_TYPE_CMD_HARD_ERR 0x6 #define EVENT_TYPE_IOTLB_INV_TO 0x7 #define EVENT_TYPE_INV_DEV_REQ 0x8 #define EVENT_DEVID_MASK 0xffff #define EVENT_DEVID_SHIFT 0 #define EVENT_DOMID_MASK 0xffff #define EVENT_DOMID_SHIFT 0 #define EVENT_FLAGS_MASK 0xfff #define EVENT_FLAGS_SHIFT 0x10 /* feature control bits */ #define CONTROL_IOMMU_EN 0x00ULL #define CONTROL_HT_TUN_EN 0x01ULL #define CONTROL_EVT_LOG_EN 0x02ULL #define CONTROL_EVT_INT_EN 0x03ULL #define CONTROL_COMWAIT_EN 0x04ULL #define CONTROL_PASSPW_EN 0x08ULL #define CONTROL_RESPASSPW_EN 0x09ULL #define CONTROL_COHERENT_EN 0x0aULL #define CONTROL_ISOC_EN 0x0bULL #define CONTROL_CMDBUF_EN 0x0cULL #define CONTROL_PPFLOG_EN 0x0dULL #define CONTROL_PPFINT_EN 0x0eULL /* command specific defines */ #define CMD_COMPL_WAIT 0x01 #define CMD_INV_DEV_ENTRY 0x02 #define CMD_INV_IOMMU_PAGES 0x03 #define CMD_COMPL_WAIT_STORE_MASK 0x01 #define CMD_COMPL_WAIT_INT_MASK 0x02 #define CMD_INV_IOMMU_PAGES_SIZE_MASK 0x01 #define CMD_INV_IOMMU_PAGES_PDE_MASK 0x02 #define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL /* macros and definitions for device table entries */ #define DEV_ENTRY_VALID 0x00 #define DEV_ENTRY_TRANSLATION 0x01 #define DEV_ENTRY_IR 0x3d #define DEV_ENTRY_IW 0x3e #define DEV_ENTRY_NO_PAGE_FAULT 0x62 #define DEV_ENTRY_EX 0x67 #define DEV_ENTRY_SYSMGT1 0x68 #define DEV_ENTRY_SYSMGT2 0x69 #define DEV_ENTRY_INIT_PASS 0xb8 #define DEV_ENTRY_EINT_PASS 0xb9 #define DEV_ENTRY_NMI_PASS 0xba #define DEV_ENTRY_LINT0_PASS 0xbe #define DEV_ENTRY_LINT1_PASS 0xbf #define DEV_ENTRY_MODE_MASK 0x07 #define DEV_ENTRY_MODE_SHIFT 0x09 /* constants to configure the command buffer */ #define CMD_BUFFER_SIZE 8192 #define CMD_BUFFER_ENTRIES 512 #define MMIO_CMD_SIZE_SHIFT 56 #define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT) /* constants for event buffer handling */ #define EVT_BUFFER_SIZE 8192 /* 512 entries */ #define EVT_LEN_MASK (0x9ULL << 56) #define PAGE_MODE_NONE 0x00 #define PAGE_MODE_1_LEVEL 0x01 #define PAGE_MODE_2_LEVEL 0x02 #define PAGE_MODE_3_LEVEL 0x03 #define PAGE_MODE_4_LEVEL 0x04 #define PAGE_MODE_5_LEVEL 0x05 #define PAGE_MODE_6_LEVEL 0x06 #define PM_LEVEL_SHIFT(x) (12 + ((x) * 9)) #define PM_LEVEL_SIZE(x) (((x) < 6) ? \ ((1ULL << PM_LEVEL_SHIFT((x))) - 1): \ (0xffffffffffffffffULL)) #define PM_LEVEL_INDEX(x, a) (((a) >> PM_LEVEL_SHIFT((x))) & 0x1ffULL) #define PM_LEVEL_ENC(x) (((x) << 9) & 0xe00ULL) #define PM_LEVEL_PDE(x, a) ((a) | PM_LEVEL_ENC((x)) | \ IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW) #define PM_PTE_LEVEL(pte) (((pte) >> 9) & 0x7ULL) #define PM_MAP_4k 0 #define PM_ADDR_MASK 0x000ffffffffff000ULL #define PM_MAP_MASK(lvl) (PM_ADDR_MASK & \ (~((1ULL << (12 + ((lvl) * 9))) - 1))) #define PM_ALIGNED(lvl, addr) ((PM_MAP_MASK(lvl) & (addr)) == (addr)) #define IOMMU_PTE_P (1ULL << 0) #define IOMMU_PTE_TV (1ULL << 1) #define IOMMU_PTE_U (1ULL << 59) #define IOMMU_PTE_FC (1ULL << 60) #define IOMMU_PTE_IR (1ULL << 61) #define IOMMU_PTE_IW (1ULL << 62) #define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL) #define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P) #define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK)) #define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07) #define IOMMU_PROT_MASK 0x03 #define IOMMU_PROT_IR 0x01 #define IOMMU_PROT_IW 0x02 /* IOMMU capabilities */ #define IOMMU_CAP_IOTLB 24 #define IOMMU_CAP_NPCACHE 26 #define MAX_DOMAIN_ID 65536 /* FIXME: move this macro to */ #define PCI_BUS(x) (((x) >> 8) & 0xff) /* Protection domain flags */ #define PD_DMA_OPS_MASK (1UL << 0) /* domain used for dma_ops */ #define PD_DEFAULT_MASK (1UL << 1) /* domain is a default dma_ops domain for an IOMMU */ #define PD_PASSTHROUGH_MASK (1UL << 2) /* domain has no page translation */ extern bool amd_iommu_dump; #define DUMP_printk(format, arg...) \ do { \ if (amd_iommu_dump) \ printk(KERN_INFO "AMD-Vi: " format, ## arg); \ } while(0); /* global flag if IOMMUs cache non-present entries */ extern bool amd_iommu_np_cache; /* * Make iterating over all IOMMUs easier */ #define for_each_iommu(iommu) \ list_for_each_entry((iommu), &amd_iommu_list, list) #define for_each_iommu_safe(iommu, next) \ list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list) #define APERTURE_RANGE_SHIFT 27 /* 128 MB */ #define APERTURE_RANGE_SIZE (1ULL << APERTURE_RANGE_SHIFT) #define APERTURE_RANGE_PAGES (APERTURE_RANGE_SIZE >> PAGE_SHIFT) #define APERTURE_MAX_RANGES 32 /* allows 4GB of DMA address space */ #define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT) #define APERTURE_PAGE_INDEX(a) (((a) >> 21) & 0x3fULL) /* * This structure contains generic data for IOMMU protection domains * independent of their use. */ struct protection_domain { struct list_head list; /* for list of all protection domains */ struct list_head dev_list; /* List of all devices in this domain */ spinlock_t lock; /* mostly used to lock the page table*/ u16 id; /* the domain id written to the device table */ int mode; /* paging mode (0-6 levels) */ u64 *pt_root; /* page table root pointer */ unsigned long flags; /* flags to find out type of domain */ bool updated; /* complete domain flush required */ unsigned dev_cnt; /* devices assigned to this domain */ unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */ void *priv; /* private data */ }; /* * This struct contains device specific data for the IOMMU */ struct iommu_dev_data { struct list_head list; /* For domain->dev_list */ struct device *dev; /* Device this data belong to */ struct device *alias; /* The Alias Device */ struct protection_domain *domain; /* Domain the device is bound to */ atomic_t bind; /* Domain attach reverent count */ }; /* * For dynamic growth the aperture size is split into ranges of 128MB of * DMA address space each. This struct represents one such range. */ struct aperture_range { /* address allocation bitmap */ unsigned long *bitmap; /* * Array of PTE pages for the aperture. In this array we save all the * leaf pages of the domain page table used for the aperture. This way * we don't need to walk the page table to find a specific PTE. We can * just calculate its address in constant time. */ u64 *pte_pages[64]; unsigned long offset; }; /* * Data container for a dma_ops specific protection domain */ struct dma_ops_domain { struct list_head list; /* generic protection domain information */ struct protection_domain domain; /* size of the aperture for the mappings */ unsigned long aperture_size; /* address we start to search for free addresses */ unsigned long next_address; /* address space relevant data */ struct aperture_range *aperture[APERTURE_MAX_RANGES]; /* This will be set to true when TLB needs to be flushed */ bool need_flush; /* * if this is a preallocated domain, keep the device for which it was * preallocated in this variable */ u16 target_dev; }; /* * Structure where we save information about one hardware AMD IOMMU in the * system. */ struct amd_iommu { struct list_head list; /* Index within the IOMMU array */ int index; /* locks the accesses to the hardware */ spinlock_t lock; /* Pointer to PCI device of this IOMMU */ struct pci_dev *dev; /* physical address of MMIO space */ u64 mmio_phys; /* virtual address of MMIO space */ u8 *mmio_base; /* capabilities of that IOMMU read from ACPI */ u32 cap; /* * Capability pointer. There could be more than one IOMMU per PCI * device function if there are more than one AMD IOMMU capability * pointers. */ u16 cap_ptr; /* pci domain of this IOMMU */ u16 pci_seg; /* first device this IOMMU handles. read from PCI */ u16 first_device; /* last device this IOMMU handles. read from PCI */ u16 last_device; /* start of exclusion range of that IOMMU */ u64 exclusion_start; /* length of exclusion range of that IOMMU */ u64 exclusion_length; /* command buffer virtual address */ u8 *cmd_buf; /* size of command buffer */ u32 cmd_buf_size; /* size of event buffer */ u32 evt_buf_size; /* event buffer virtual address */ u8 *evt_buf; /* MSI number for event interrupt */ u16 evt_msi_num; /* true if interrupts for this IOMMU are already enabled */ bool int_enabled; /* if one, we need to send a completion wait command */ bool need_sync; /* becomes true if a command buffer reset is running */ bool reset_in_progress; /* default dma_ops domain for that IOMMU */ struct dma_ops_domain *default_dom; }; /* * List with all IOMMUs in the system. This list is not locked because it is * only written and read at driver initialization or suspend time */ extern struct list_head amd_iommu_list; /* * Array with pointers to each IOMMU struct * The indices are referenced in the protection domains */ extern struct amd_iommu *amd_iommus[MAX_IOMMUS]; /* Number of IOMMUs present in the system */ extern int amd_iommus_present; /* * Declarations for the global list of all protection domains */ extern spinlock_t amd_iommu_pd_lock; extern struct list_head amd_iommu_pd_list; /* * Structure defining one entry in the device table */ struct dev_table_entry { u32 data[8]; }; /* * One entry for unity mappings parsed out of the ACPI table. */ struct unity_map_entry { struct list_head list; /* starting device id this entry is used for (including) */ u16 devid_start; /* end device id this entry is used for (including) */ u16 devid_end; /* start address to unity map (including) */ u64 address_start; /* end address to unity map (including) */ u64 address_end; /* required protection */ int prot; }; /* * List of all unity mappings. It is not locked because as runtime it is only * read. It is created at ACPI table parsing time. */ extern struct list_head amd_iommu_unity_map; /* * Data structures for device handling */ /* * Device table used by hardware. Read and write accesses by software are * locked with the amd_iommu_pd_table lock. */ extern struct dev_table_entry *amd_iommu_dev_table; /* * Alias table to find requestor ids to device ids. Not locked because only * read on runtime. */ extern u16 *amd_iommu_alias_table; /* * Reverse lookup table to find the IOMMU which translates a specific device. */ extern struct amd_iommu **amd_iommu_rlookup_table; /* size of the dma_ops aperture as power of 2 */ extern unsigned amd_iommu_aperture_order; /* largest PCI device id we expect translation requests for */ extern u16 amd_iommu_last_bdf; /* allocation bitmap for domain ids */ extern unsigned long *amd_iommu_pd_alloc_bitmap; /* * If true, the addresses will be flushed on unmap time, not when * they are reused */ extern bool amd_iommu_unmap_flush; /* takes bus and device/function and returns the device id * FIXME: should that be in generic PCI code? */ static inline u16 calc_devid(u8 bus, u8 devfn) { return (((u16)bus) << 8) | devfn; } #ifdef CONFIG_AMD_IOMMU_STATS struct __iommu_counter { char *name; struct dentry *dent; u64 value; }; #define DECLARE_STATS_COUNTER(nm) \ static struct __iommu_counter nm = { \ .name = #nm, \ } #define INC_STATS_COUNTER(name) name.value += 1 #define ADD_STATS_COUNTER(name, x) name.value += (x) #define SUB_STATS_COUNTER(name, x) name.value -= (x) #else /* CONFIG_AMD_IOMMU_STATS */ #define DECLARE_STATS_COUNTER(name) #define INC_STATS_COUNTER(name) #define ADD_STATS_COUNTER(name, x) #define SUB_STATS_COUNTER(name, x) #endif /* CONFIG_AMD_IOMMU_STATS */ #endif /* _ASM_X86_AMD_IOMMU_TYPES_H */