2 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
4 * Leo Duran <leo.duran@amd.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef __AMD_IOMMU_TYPES_H__
21 #define __AMD_IOMMU_TYPES_H__
23 #include <linux/types.h>
24 #include <linux/list.h>
25 #include <linux/spinlock.h>
28 * some size calculation constants
30 #define DEV_TABLE_ENTRY_SIZE 32
31 #define ALIAS_TABLE_ENTRY_SIZE 2
32 #define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *))
34 /* Length of the MMIO region for the AMD IOMMU */
35 #define MMIO_REGION_LENGTH 0x4000
37 /* Capability offsets used by the driver */
38 #define MMIO_CAP_HDR_OFFSET 0x00
39 #define MMIO_RANGE_OFFSET 0x0c
40 #define MMIO_MISC_OFFSET 0x10
42 /* Masks, shifts and macros to parse the device range capability */
43 #define MMIO_RANGE_LD_MASK 0xff000000
44 #define MMIO_RANGE_FD_MASK 0x00ff0000
45 #define MMIO_RANGE_BUS_MASK 0x0000ff00
46 #define MMIO_RANGE_LD_SHIFT 24
47 #define MMIO_RANGE_FD_SHIFT 16
48 #define MMIO_RANGE_BUS_SHIFT 8
49 #define MMIO_GET_LD(x) (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
50 #define MMIO_GET_FD(x) (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
51 #define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
52 #define MMIO_MSI_NUM(x) ((x) & 0x1f)
54 /* Flag masks for the AMD IOMMU exclusion range */
55 #define MMIO_EXCL_ENABLE_MASK 0x01ULL
56 #define MMIO_EXCL_ALLOW_MASK 0x02ULL
58 /* Used offsets into the MMIO space */
59 #define MMIO_DEV_TABLE_OFFSET 0x0000
60 #define MMIO_CMD_BUF_OFFSET 0x0008
61 #define MMIO_EVT_BUF_OFFSET 0x0010
62 #define MMIO_CONTROL_OFFSET 0x0018
63 #define MMIO_EXCL_BASE_OFFSET 0x0020
64 #define MMIO_EXCL_LIMIT_OFFSET 0x0028
65 #define MMIO_CMD_HEAD_OFFSET 0x2000
66 #define MMIO_CMD_TAIL_OFFSET 0x2008
67 #define MMIO_EVT_HEAD_OFFSET 0x2010
68 #define MMIO_EVT_TAIL_OFFSET 0x2018
69 #define MMIO_STATUS_OFFSET 0x2020
71 /* MMIO status bits */
72 #define MMIO_STATUS_COM_WAIT_INT_MASK 0x04
74 /* event logging constants */
75 #define EVENT_ENTRY_SIZE 0x10
76 #define EVENT_TYPE_SHIFT 28
77 #define EVENT_TYPE_MASK 0xf
78 #define EVENT_TYPE_ILL_DEV 0x1
79 #define EVENT_TYPE_IO_FAULT 0x2
80 #define EVENT_TYPE_DEV_TAB_ERR 0x3
81 #define EVENT_TYPE_PAGE_TAB_ERR 0x4
82 #define EVENT_TYPE_ILL_CMD 0x5
83 #define EVENT_TYPE_CMD_HARD_ERR 0x6
84 #define EVENT_TYPE_IOTLB_INV_TO 0x7
85 #define EVENT_TYPE_INV_DEV_REQ 0x8
86 #define EVENT_DEVID_MASK 0xffff
87 #define EVENT_DEVID_SHIFT 0
88 #define EVENT_DOMID_MASK 0xffff
89 #define EVENT_DOMID_SHIFT 0
90 #define EVENT_FLAGS_MASK 0xfff
91 #define EVENT_FLAGS_SHIFT 0x10
93 /* feature control bits */
94 #define CONTROL_IOMMU_EN 0x00ULL
95 #define CONTROL_HT_TUN_EN 0x01ULL
96 #define CONTROL_EVT_LOG_EN 0x02ULL
97 #define CONTROL_EVT_INT_EN 0x03ULL
98 #define CONTROL_COMWAIT_EN 0x04ULL
99 #define CONTROL_PASSPW_EN 0x08ULL
100 #define CONTROL_RESPASSPW_EN 0x09ULL
101 #define CONTROL_COHERENT_EN 0x0aULL
102 #define CONTROL_ISOC_EN 0x0bULL
103 #define CONTROL_CMDBUF_EN 0x0cULL
104 #define CONTROL_PPFLOG_EN 0x0dULL
105 #define CONTROL_PPFINT_EN 0x0eULL
107 /* command specific defines */
108 #define CMD_COMPL_WAIT 0x01
109 #define CMD_INV_DEV_ENTRY 0x02
110 #define CMD_INV_IOMMU_PAGES 0x03
112 #define CMD_COMPL_WAIT_STORE_MASK 0x01
113 #define CMD_COMPL_WAIT_INT_MASK 0x02
114 #define CMD_INV_IOMMU_PAGES_SIZE_MASK 0x01
115 #define CMD_INV_IOMMU_PAGES_PDE_MASK 0x02
117 #define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL
119 /* macros and definitions for device table entries */
120 #define DEV_ENTRY_VALID 0x00
121 #define DEV_ENTRY_TRANSLATION 0x01
122 #define DEV_ENTRY_IR 0x3d
123 #define DEV_ENTRY_IW 0x3e
124 #define DEV_ENTRY_NO_PAGE_FAULT 0x62
125 #define DEV_ENTRY_EX 0x67
126 #define DEV_ENTRY_SYSMGT1 0x68
127 #define DEV_ENTRY_SYSMGT2 0x69
128 #define DEV_ENTRY_INIT_PASS 0xb8
129 #define DEV_ENTRY_EINT_PASS 0xb9
130 #define DEV_ENTRY_NMI_PASS 0xba
131 #define DEV_ENTRY_LINT0_PASS 0xbe
132 #define DEV_ENTRY_LINT1_PASS 0xbf
134 /* constants to configure the command buffer */
135 #define CMD_BUFFER_SIZE 8192
136 #define CMD_BUFFER_ENTRIES 512
137 #define MMIO_CMD_SIZE_SHIFT 56
138 #define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
140 /* constants for event buffer handling */
141 #define EVT_BUFFER_SIZE 8192 /* 512 entries */
142 #define EVT_LEN_MASK (0x9ULL << 56)
144 #define PAGE_MODE_1_LEVEL 0x01
145 #define PAGE_MODE_2_LEVEL 0x02
146 #define PAGE_MODE_3_LEVEL 0x03
148 #define IOMMU_PDE_NL_0 0x000ULL
149 #define IOMMU_PDE_NL_1 0x200ULL
150 #define IOMMU_PDE_NL_2 0x400ULL
151 #define IOMMU_PDE_NL_3 0x600ULL
153 #define IOMMU_PTE_L2_INDEX(address) (((address) >> 30) & 0x1ffULL)
154 #define IOMMU_PTE_L1_INDEX(address) (((address) >> 21) & 0x1ffULL)
155 #define IOMMU_PTE_L0_INDEX(address) (((address) >> 12) & 0x1ffULL)
157 #define IOMMU_MAP_SIZE_L1 (1ULL << 21)
158 #define IOMMU_MAP_SIZE_L2 (1ULL << 30)
159 #define IOMMU_MAP_SIZE_L3 (1ULL << 39)
161 #define IOMMU_PTE_P (1ULL << 0)
162 #define IOMMU_PTE_U (1ULL << 59)
163 #define IOMMU_PTE_FC (1ULL << 60)
164 #define IOMMU_PTE_IR (1ULL << 61)
165 #define IOMMU_PTE_IW (1ULL << 62)
167 #define IOMMU_L1_PDE(address) \
168 ((address) | IOMMU_PDE_NL_1 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
169 #define IOMMU_L2_PDE(address) \
170 ((address) | IOMMU_PDE_NL_2 | IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
172 #define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
173 #define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P)
174 #define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK))
175 #define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
177 #define IOMMU_PROT_MASK 0x03
178 #define IOMMU_PROT_IR 0x01
179 #define IOMMU_PROT_IW 0x02
181 /* IOMMU capabilities */
182 #define IOMMU_CAP_IOTLB 24
183 #define IOMMU_CAP_NPCACHE 26
185 #define MAX_DOMAIN_ID 65536
187 /* FIXME: move this macro to <linux/pci.h> */
188 #define PCI_BUS(x) (((x) >> 8) & 0xff)
191 * This structure contains generic data for IOMMU protection domains
192 * independent of their use.
194 struct protection_domain {
195 spinlock_t lock; /* mostly used to lock the page table*/
196 u16 id; /* the domain id written to the device table */
197 int mode; /* paging mode (0-6 levels) */
198 u64 *pt_root; /* page table root pointer */
199 void *priv; /* private data */
203 * Data container for a dma_ops specific protection domain
205 struct dma_ops_domain {
206 struct list_head list;
208 /* generic protection domain information */
209 struct protection_domain domain;
211 /* size of the aperture for the mappings */
212 unsigned long aperture_size;
214 /* address we start to search for free addresses */
215 unsigned long next_bit;
217 /* address allocation bitmap */
218 unsigned long *bitmap;
221 * Array of PTE pages for the aperture. In this array we save all the
222 * leaf pages of the domain page table used for the aperture. This way
223 * we don't need to walk the page table to find a specific PTE. We can
224 * just calculate its address in constant time.
228 /* This will be set to true when TLB needs to be flushed */
233 * Structure where we save information about one hardware AMD IOMMU in the
237 struct list_head list;
239 /* locks the accesses to the hardware */
242 /* Pointer to PCI device of this IOMMU */
246 * Capability pointer. There could be more than one IOMMU per PCI
247 * device function if there are more than one AMD IOMMU capability
252 /* physical address of MMIO space */
254 /* virtual address of MMIO space */
257 /* capabilities of that IOMMU read from ACPI */
260 /* pci domain of this IOMMU */
263 /* first device this IOMMU handles. read from PCI */
265 /* last device this IOMMU handles. read from PCI */
268 /* start of exclusion range of that IOMMU */
270 /* length of exclusion range of that IOMMU */
271 u64 exclusion_length;
273 /* command buffer virtual address */
275 /* size of command buffer */
278 /* event buffer virtual address */
280 /* size of event buffer */
282 /* MSI number for event interrupt */
285 /* if one, we need to send a completion wait command */
288 /* true if interrupts for this IOMMU are already enabled */
291 /* default dma_ops domain for that IOMMU */
292 struct dma_ops_domain *default_dom;
296 * List with all IOMMUs in the system. This list is not locked because it is
297 * only written and read at driver initialization or suspend time
299 extern struct list_head amd_iommu_list;
302 * Structure defining one entry in the device table
304 struct dev_table_entry {
309 * One entry for unity mappings parsed out of the ACPI table.
311 struct unity_map_entry {
312 struct list_head list;
314 /* starting device id this entry is used for (including) */
316 /* end device id this entry is used for (including) */
319 /* start address to unity map (including) */
321 /* end address to unity map (including) */
324 /* required protection */
329 * List of all unity mappings. It is not locked because as runtime it is only
330 * read. It is created at ACPI table parsing time.
332 extern struct list_head amd_iommu_unity_map;
335 * Data structures for device handling
339 * Device table used by hardware. Read and write accesses by software are
340 * locked with the amd_iommu_pd_table lock.
342 extern struct dev_table_entry *amd_iommu_dev_table;
345 * Alias table to find requestor ids to device ids. Not locked because only
348 extern u16 *amd_iommu_alias_table;
351 * Reverse lookup table to find the IOMMU which translates a specific device.
353 extern struct amd_iommu **amd_iommu_rlookup_table;
355 /* size of the dma_ops aperture as power of 2 */
356 extern unsigned amd_iommu_aperture_order;
358 /* largest PCI device id we expect translation requests for */
359 extern u16 amd_iommu_last_bdf;
361 /* data structures for protection domain handling */
362 extern struct protection_domain **amd_iommu_pd_table;
364 /* allocation bitmap for domain ids */
365 extern unsigned long *amd_iommu_pd_alloc_bitmap;
367 /* will be 1 if device isolation is enabled */
368 extern int amd_iommu_isolate;
370 /* takes a PCI device id and prints it out in a readable form */
371 static inline void print_devid(u16 devid, int nl)
373 int bus = devid >> 8;
374 int dev = devid >> 3 & 0x1f;
375 int fn = devid & 0x07;
377 printk("%02x:%02x.%x", bus, dev, fn);
382 /* takes bus and device/function and returns the device id
383 * FIXME: should that be in generic PCI code? */
384 static inline u16 calc_devid(u8 bus, u8 devfn)
386 return (((u16)bus) << 8) | devfn;