| /* |
| * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. |
| * Author: Joerg Roedel <joerg.roedel@amd.com> |
| * Leo Duran <leo.duran@amd.com> |
| * |
| * 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 __AMD_IOMMU_TYPES_H__ |
| #define __AMD_IOMMU_TYPES_H__ |
| |
| #include <linux/types.h> |
| #include <linux/list.h> |
| #include <linux/spinlock.h> |
| |
| /* |
| * 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 |
| |
| /* 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) |
| |
| /* 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 |
| |
| /* 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 |
| |
| /* 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) |
| |
| #define PAGE_MODE_1_LEVEL 0x01 |
| #define PAGE_MODE_2_LEVEL 0x02 |
| #define PAGE_MODE_3_LEVEL 0x03 |
| |
| #define IOMMU_PDE_NL_0 0x000ULL |
| #define IOMMU_PDE_NL_1 0x200ULL |
| #define IOMMU_PDE_NL_2 0x400ULL |
| #define IOMMU_PDE_NL_3 0x600ULL |
| |
| #define IOMMU_PTE_L2_INDEX(address) (((address) >> 30) & 0x1ffULL) |
| #define IOMMU_PTE_L1_INDEX(address) (((address) >> 21) & 0x1ffULL) |
| #define IOMMU_PTE_L0_INDEX(address) (((address) >> 12) & 0x1ffULL) |
| |
| #define IOMMU_MAP_SIZE_L1 (1ULL << 21) |
| #define IOMMU_MAP_SIZE_L2 (1ULL << 30) |
| #define IOMMU_MAP_SIZE_L3 (1ULL << 39) |
| |
| #define IOMMU_PTE_P (1ULL << 0) |
| #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_L1_PDE(address) \ |
| ((address) | IOMMU_PDE_NL_1 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW) |
| #define IOMMU_L2_PDE(address) \ |
| ((address) | IOMMU_PDE_NL_2 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW) |
| |
| #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 |
| |
| /* |
| * This structure contains generic data for IOMMU protection domains |
| * independent of their use. |
| */ |
| struct protection_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 */ |
| void *priv; /* private data */ |
| }; |
| |
| /* |
| * 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_bit; |
| |
| /* 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; |
| }; |
| |
| /* |
| * Structure where we save information about one hardware AMD IOMMU in the |
| * system. |
| */ |
| struct amd_iommu { |
| struct list_head list; |
| |
| /* locks the accesses to the hardware */ |
| spinlock_t lock; |
| |
| /* device id of this IOMMU */ |
| u16 devid; |
| /* |
| * 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; |
| |
| /* 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; |
| |
| /* 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; |
| |
| /* if one, we need to send a completion wait command */ |
| int need_sync; |
| |
| /* 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; |
| |
| /* |
| * 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; |
| |
| /* data structures for protection domain handling */ |
| extern struct protection_domain **amd_iommu_pd_table; |
| |
| /* allocation bitmap for domain ids */ |
| extern unsigned long *amd_iommu_pd_alloc_bitmap; |
| |
| /* will be 1 if device isolation is enabled */ |
| extern int amd_iommu_isolate; |
| |
| /* takes a PCI device id and prints it out in a readable form */ |
| static inline void print_devid(u16 devid, int nl) |
| { |
| int bus = devid >> 8; |
| int dev = devid >> 3 & 0x1f; |
| int fn = devid & 0x07; |
| |
| printk("%02x:%02x.%x", bus, dev, fn); |
| if (nl) |
| printk("\n"); |
| } |
| |
| /* 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; |
| } |
| |
| #endif |