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243 lines
6.7 KiB
C
243 lines
6.7 KiB
C
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/*
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* Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
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* Author: Joerg Roedel <joerg.roedel@amd.com>
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* Leo Duran <leo.duran@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __AMD_IOMMU_TYPES_H__
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#define __AMD_IOMMU_TYPES_H__
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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/*
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* some size calculation constants
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*/
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#define DEV_TABLE_ENTRY_SIZE 256
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#define ALIAS_TABLE_ENTRY_SIZE 2
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#define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *))
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/* helper macros */
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#define LOW_U32(x) ((x) & ((1ULL << 32)-1))
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#define HIGH_U32(x) (LOW_U32((x) >> 32))
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/* Length of the MMIO region for the AMD IOMMU */
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#define MMIO_REGION_LENGTH 0x4000
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/* Capability offsets used by the driver */
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#define MMIO_CAP_HDR_OFFSET 0x00
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#define MMIO_RANGE_OFFSET 0x0c
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/* Masks, shifts and macros to parse the device range capability */
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#define MMIO_RANGE_LD_MASK 0xff000000
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#define MMIO_RANGE_FD_MASK 0x00ff0000
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#define MMIO_RANGE_BUS_MASK 0x0000ff00
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#define MMIO_RANGE_LD_SHIFT 24
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#define MMIO_RANGE_FD_SHIFT 16
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#define MMIO_RANGE_BUS_SHIFT 8
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#define MMIO_GET_LD(x) (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
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#define MMIO_GET_FD(x) (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
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#define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
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/* Flag masks for the AMD IOMMU exclusion range */
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#define MMIO_EXCL_ENABLE_MASK 0x01ULL
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#define MMIO_EXCL_ALLOW_MASK 0x02ULL
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/* Used offsets into the MMIO space */
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#define MMIO_DEV_TABLE_OFFSET 0x0000
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#define MMIO_CMD_BUF_OFFSET 0x0008
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#define MMIO_EVT_BUF_OFFSET 0x0010
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#define MMIO_CONTROL_OFFSET 0x0018
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#define MMIO_EXCL_BASE_OFFSET 0x0020
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#define MMIO_EXCL_LIMIT_OFFSET 0x0028
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#define MMIO_CMD_HEAD_OFFSET 0x2000
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#define MMIO_CMD_TAIL_OFFSET 0x2008
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#define MMIO_EVT_HEAD_OFFSET 0x2010
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#define MMIO_EVT_TAIL_OFFSET 0x2018
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#define MMIO_STATUS_OFFSET 0x2020
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/* feature control bits */
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#define CONTROL_IOMMU_EN 0x00ULL
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#define CONTROL_HT_TUN_EN 0x01ULL
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#define CONTROL_EVT_LOG_EN 0x02ULL
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#define CONTROL_EVT_INT_EN 0x03ULL
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#define CONTROL_COMWAIT_EN 0x04ULL
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#define CONTROL_PASSPW_EN 0x08ULL
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#define CONTROL_RESPASSPW_EN 0x09ULL
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#define CONTROL_COHERENT_EN 0x0aULL
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#define CONTROL_ISOC_EN 0x0bULL
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#define CONTROL_CMDBUF_EN 0x0cULL
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#define CONTROL_PPFLOG_EN 0x0dULL
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#define CONTROL_PPFINT_EN 0x0eULL
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/* command specific defines */
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#define CMD_COMPL_WAIT 0x01
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#define CMD_INV_DEV_ENTRY 0x02
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#define CMD_INV_IOMMU_PAGES 0x03
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#define CMD_COMPL_WAIT_STORE_MASK 0x01
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#define CMD_INV_IOMMU_PAGES_SIZE_MASK 0x01
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#define CMD_INV_IOMMU_PAGES_PDE_MASK 0x02
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/* macros and definitions for device table entries */
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#define DEV_ENTRY_VALID 0x00
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#define DEV_ENTRY_TRANSLATION 0x01
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#define DEV_ENTRY_IR 0x3d
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#define DEV_ENTRY_IW 0x3e
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#define DEV_ENTRY_EX 0x67
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#define DEV_ENTRY_SYSMGT1 0x68
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#define DEV_ENTRY_SYSMGT2 0x69
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#define DEV_ENTRY_INIT_PASS 0xb8
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#define DEV_ENTRY_EINT_PASS 0xb9
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#define DEV_ENTRY_NMI_PASS 0xba
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#define DEV_ENTRY_LINT0_PASS 0xbe
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#define DEV_ENTRY_LINT1_PASS 0xbf
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/* constants to configure the command buffer */
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#define CMD_BUFFER_SIZE 8192
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#define CMD_BUFFER_ENTRIES 512
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#define MMIO_CMD_SIZE_SHIFT 56
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#define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
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#define PAGE_MODE_1_LEVEL 0x01
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#define PAGE_MODE_2_LEVEL 0x02
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#define PAGE_MODE_3_LEVEL 0x03
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#define IOMMU_PDE_NL_0 0x000ULL
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#define IOMMU_PDE_NL_1 0x200ULL
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#define IOMMU_PDE_NL_2 0x400ULL
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#define IOMMU_PDE_NL_3 0x600ULL
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#define IOMMU_PTE_L2_INDEX(address) (((address) >> 30) & 0x1ffULL)
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#define IOMMU_PTE_L1_INDEX(address) (((address) >> 21) & 0x1ffULL)
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#define IOMMU_PTE_L0_INDEX(address) (((address) >> 12) & 0x1ffULL)
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#define IOMMU_MAP_SIZE_L1 (1ULL << 21)
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#define IOMMU_MAP_SIZE_L2 (1ULL << 30)
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#define IOMMU_MAP_SIZE_L3 (1ULL << 39)
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#define IOMMU_PTE_P (1ULL << 0)
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#define IOMMU_PTE_U (1ULL << 59)
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#define IOMMU_PTE_FC (1ULL << 60)
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#define IOMMU_PTE_IR (1ULL << 61)
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#define IOMMU_PTE_IW (1ULL << 62)
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#define IOMMU_L1_PDE(address) \
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((address) | IOMMU_PDE_NL_1 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
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#define IOMMU_L2_PDE(address) \
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((address) | IOMMU_PDE_NL_2 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
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#define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
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#define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P)
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#define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK))
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#define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
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#define IOMMU_PROT_MASK 0x03
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#define IOMMU_PROT_IR 0x01
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#define IOMMU_PROT_IW 0x02
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/* IOMMU capabilities */
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#define IOMMU_CAP_IOTLB 24
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#define IOMMU_CAP_NPCACHE 26
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#define MAX_DOMAIN_ID 65536
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struct protection_domain {
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spinlock_t lock;
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u16 id;
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int mode;
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u64 *pt_root;
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void *priv;
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};
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struct dma_ops_domain {
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struct list_head list;
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struct protection_domain domain;
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unsigned long aperture_size;
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unsigned long next_bit;
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unsigned long *bitmap;
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u64 **pte_pages;
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};
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struct amd_iommu {
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struct list_head list;
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spinlock_t lock;
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u16 devid;
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u16 cap_ptr;
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u64 mmio_phys;
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u8 *mmio_base;
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u32 cap;
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u16 first_device;
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u16 last_device;
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u64 exclusion_start;
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u64 exclusion_length;
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u8 *cmd_buf;
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u32 cmd_buf_size;
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int need_sync;
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struct dma_ops_domain *default_dom;
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};
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extern struct list_head amd_iommu_list;
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struct dev_table_entry {
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u32 data[8];
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};
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struct unity_map_entry {
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struct list_head list;
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u16 devid_start;
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u16 devid_end;
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u64 address_start;
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u64 address_end;
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int prot;
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};
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extern struct list_head amd_iommu_unity_map;
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/* data structures for device handling */
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extern struct dev_table_entry *amd_iommu_dev_table;
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extern u16 *amd_iommu_alias_table;
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extern struct amd_iommu **amd_iommu_rlookup_table;
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extern unsigned amd_iommu_aperture_order;
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extern u16 amd_iommu_last_bdf;
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/* data structures for protection domain handling */
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extern struct protection_domain **amd_iommu_pd_table;
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extern unsigned long *amd_iommu_pd_alloc_bitmap;
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extern int amd_iommu_isolate;
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static inline void print_devid(u16 devid, int nl)
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{
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int bus = devid >> 8;
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int dev = devid >> 3 & 0x1f;
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int fn = devid & 0x07;
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printk("%02x:%02x.%x", bus, dev, fn);
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if (nl)
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printk("\n");
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}
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#endif
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