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-rw-r--r--drivers/iommu/Makefile2
-rw-r--r--drivers/iommu/amd_iommu.c7
-rw-r--r--drivers/iommu/amd_iommu_init.c1574
-rw-r--r--drivers/iommu/amd_iommu_proto.h54
-rw-r--r--drivers/iommu/amd_iommu_types.h580
5 files changed, 2213 insertions, 4 deletions
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 49e9c0f46bd..4d4d77df7ca 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -1,5 +1,5 @@
1obj-$(CONFIG_IOMMU_API) += iommu.o 1obj-$(CONFIG_IOMMU_API) += iommu.o
2obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o 2obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
3obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o 3obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
4obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o 4obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
5obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o 5obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 7c3a95e54ec..5aa12eaabd2 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -27,13 +27,14 @@
27#include <linux/iommu-helper.h> 27#include <linux/iommu-helper.h>
28#include <linux/iommu.h> 28#include <linux/iommu.h>
29#include <linux/delay.h> 29#include <linux/delay.h>
30#include <linux/amd-iommu.h>
30#include <asm/proto.h> 31#include <asm/proto.h>
31#include <asm/iommu.h> 32#include <asm/iommu.h>
32#include <asm/gart.h> 33#include <asm/gart.h>
33#include <asm/dma.h> 34#include <asm/dma.h>
34#include <asm/amd_iommu_proto.h> 35
35#include <asm/amd_iommu_types.h> 36#include "amd_iommu_proto.h"
36#include <asm/amd_iommu.h> 37#include "amd_iommu_types.h"
37 38
38#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) 39#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
39 40
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
new file mode 100644
index 00000000000..82d2410f420
--- /dev/null
+++ b/drivers/iommu/amd_iommu_init.c
@@ -0,0 +1,1574 @@
1/*
2 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
4 * Leo Duran <leo.duran@amd.com>
5 *
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.
9 *
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.
14 *
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
18 */
19
20#include <linux/pci.h>
21#include <linux/acpi.h>
22#include <linux/list.h>
23#include <linux/slab.h>
24#include <linux/syscore_ops.h>
25#include <linux/interrupt.h>
26#include <linux/msi.h>
27#include <linux/amd-iommu.h>
28#include <asm/pci-direct.h>
29#include <asm/iommu.h>
30#include <asm/gart.h>
31#include <asm/x86_init.h>
32#include <asm/iommu_table.h>
33
34#include "amd_iommu_proto.h"
35#include "amd_iommu_types.h"
36
37/*
38 * definitions for the ACPI scanning code
39 */
40#define IVRS_HEADER_LENGTH 48
41
42#define ACPI_IVHD_TYPE 0x10
43#define ACPI_IVMD_TYPE_ALL 0x20
44#define ACPI_IVMD_TYPE 0x21
45#define ACPI_IVMD_TYPE_RANGE 0x22
46
47#define IVHD_DEV_ALL 0x01
48#define IVHD_DEV_SELECT 0x02
49#define IVHD_DEV_SELECT_RANGE_START 0x03
50#define IVHD_DEV_RANGE_END 0x04
51#define IVHD_DEV_ALIAS 0x42
52#define IVHD_DEV_ALIAS_RANGE 0x43
53#define IVHD_DEV_EXT_SELECT 0x46
54#define IVHD_DEV_EXT_SELECT_RANGE 0x47
55
56#define IVHD_FLAG_HT_TUN_EN_MASK 0x01
57#define IVHD_FLAG_PASSPW_EN_MASK 0x02
58#define IVHD_FLAG_RESPASSPW_EN_MASK 0x04
59#define IVHD_FLAG_ISOC_EN_MASK 0x08
60
61#define IVMD_FLAG_EXCL_RANGE 0x08
62#define IVMD_FLAG_UNITY_MAP 0x01
63
64#define ACPI_DEVFLAG_INITPASS 0x01
65#define ACPI_DEVFLAG_EXTINT 0x02
66#define ACPI_DEVFLAG_NMI 0x04
67#define ACPI_DEVFLAG_SYSMGT1 0x10
68#define ACPI_DEVFLAG_SYSMGT2 0x20
69#define ACPI_DEVFLAG_LINT0 0x40
70#define ACPI_DEVFLAG_LINT1 0x80
71#define ACPI_DEVFLAG_ATSDIS 0x10000000
72
73/*
74 * ACPI table definitions
75 *
76 * These data structures are laid over the table to parse the important values
77 * out of it.
78 */
79
80/*
81 * structure describing one IOMMU in the ACPI table. Typically followed by one
82 * or more ivhd_entrys.
83 */
84struct ivhd_header {
85 u8 type;
86 u8 flags;
87 u16 length;
88 u16 devid;
89 u16 cap_ptr;
90 u64 mmio_phys;
91 u16 pci_seg;
92 u16 info;
93 u32 reserved;
94} __attribute__((packed));
95
96/*
97 * A device entry describing which devices a specific IOMMU translates and
98 * which requestor ids they use.
99 */
100struct ivhd_entry {
101 u8 type;
102 u16 devid;
103 u8 flags;
104 u32 ext;
105} __attribute__((packed));
106
107/*
108 * An AMD IOMMU memory definition structure. It defines things like exclusion
109 * ranges for devices and regions that should be unity mapped.
110 */
111struct ivmd_header {
112 u8 type;
113 u8 flags;
114 u16 length;
115 u16 devid;
116 u16 aux;
117 u64 resv;
118 u64 range_start;
119 u64 range_length;
120} __attribute__((packed));
121
122bool amd_iommu_dump;
123
124static int __initdata amd_iommu_detected;
125static bool __initdata amd_iommu_disabled;
126
127u16 amd_iommu_last_bdf; /* largest PCI device id we have
128 to handle */
129LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
130 we find in ACPI */
131bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
132
133LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
134 system */
135
136/* Array to assign indices to IOMMUs*/
137struct amd_iommu *amd_iommus[MAX_IOMMUS];
138int amd_iommus_present;
139
140/* IOMMUs have a non-present cache? */
141bool amd_iommu_np_cache __read_mostly;
142bool amd_iommu_iotlb_sup __read_mostly = true;
143
144/*
145 * The ACPI table parsing functions set this variable on an error
146 */
147static int __initdata amd_iommu_init_err;
148
149/*
150 * List of protection domains - used during resume
151 */
152LIST_HEAD(amd_iommu_pd_list);
153spinlock_t amd_iommu_pd_lock;
154
155/*
156 * Pointer to the device table which is shared by all AMD IOMMUs
157 * it is indexed by the PCI device id or the HT unit id and contains
158 * information about the domain the device belongs to as well as the
159 * page table root pointer.
160 */
161struct dev_table_entry *amd_iommu_dev_table;
162
163/*
164 * The alias table is a driver specific data structure which contains the
165 * mappings of the PCI device ids to the actual requestor ids on the IOMMU.
166 * More than one device can share the same requestor id.
167 */
168u16 *amd_iommu_alias_table;
169
170/*
171 * The rlookup table is used to find the IOMMU which is responsible
172 * for a specific device. It is also indexed by the PCI device id.
173 */
174struct amd_iommu **amd_iommu_rlookup_table;
175
176/*
177 * AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap
178 * to know which ones are already in use.
179 */
180unsigned long *amd_iommu_pd_alloc_bitmap;
181
182static u32 dev_table_size; /* size of the device table */
183static u32 alias_table_size; /* size of the alias table */
184static u32 rlookup_table_size; /* size if the rlookup table */
185
186/*
187 * This function flushes all internal caches of
188 * the IOMMU used by this driver.
189 */
190extern void iommu_flush_all_caches(struct amd_iommu *iommu);
191
192static inline void update_last_devid(u16 devid)
193{
194 if (devid > amd_iommu_last_bdf)
195 amd_iommu_last_bdf = devid;
196}
197
198static inline unsigned long tbl_size(int entry_size)
199{
200 unsigned shift = PAGE_SHIFT +
201 get_order(((int)amd_iommu_last_bdf + 1) * entry_size);
202
203 return 1UL << shift;
204}
205
206/* Access to l1 and l2 indexed register spaces */
207
208static u32 iommu_read_l1(struct amd_iommu *iommu, u16 l1, u8 address)
209{
210 u32 val;
211
212 pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16));
213 pci_read_config_dword(iommu->dev, 0xfc, &val);
214 return val;
215}
216
217static void iommu_write_l1(struct amd_iommu *iommu, u16 l1, u8 address, u32 val)
218{
219 pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16 | 1 << 31));
220 pci_write_config_dword(iommu->dev, 0xfc, val);
221 pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16));
222}
223
224static u32 iommu_read_l2(struct amd_iommu *iommu, u8 address)
225{
226 u32 val;
227
228 pci_write_config_dword(iommu->dev, 0xf0, address);
229 pci_read_config_dword(iommu->dev, 0xf4, &val);
230 return val;
231}
232
233static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val)
234{
235 pci_write_config_dword(iommu->dev, 0xf0, (address | 1 << 8));
236 pci_write_config_dword(iommu->dev, 0xf4, val);
237}
238
239/****************************************************************************
240 *
241 * AMD IOMMU MMIO register space handling functions
242 *
243 * These functions are used to program the IOMMU device registers in
244 * MMIO space required for that driver.
245 *
246 ****************************************************************************/
247
248/*
249 * This function set the exclusion range in the IOMMU. DMA accesses to the
250 * exclusion range are passed through untranslated
251 */
252static void iommu_set_exclusion_range(struct amd_iommu *iommu)
253{
254 u64 start = iommu->exclusion_start & PAGE_MASK;
255 u64 limit = (start + iommu->exclusion_length) & PAGE_MASK;
256 u64 entry;
257
258 if (!iommu->exclusion_start)
259 return;
260
261 entry = start | MMIO_EXCL_ENABLE_MASK;
262 memcpy_toio(iommu->mmio_base + MMIO_EXCL_BASE_OFFSET,
263 &entry, sizeof(entry));
264
265 entry = limit;
266 memcpy_toio(iommu->mmio_base + MMIO_EXCL_LIMIT_OFFSET,
267 &entry, sizeof(entry));
268}
269
270/* Programs the physical address of the device table into the IOMMU hardware */
271static void __init iommu_set_device_table(struct amd_iommu *iommu)
272{
273 u64 entry;
274
275 BUG_ON(iommu->mmio_base == NULL);
276
277 entry = virt_to_phys(amd_iommu_dev_table);
278 entry |= (dev_table_size >> 12) - 1;
279 memcpy_toio(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET,
280 &entry, sizeof(entry));
281}
282
283/* Generic functions to enable/disable certain features of the IOMMU. */
284static void iommu_feature_enable(struct amd_iommu *iommu, u8 bit)
285{
286 u32 ctrl;
287
288 ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
289 ctrl |= (1 << bit);
290 writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
291}
292
293static void iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
294{
295 u32 ctrl;
296
297 ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
298 ctrl &= ~(1 << bit);
299 writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
300}
301
302/* Function to enable the hardware */
303static void iommu_enable(struct amd_iommu *iommu)
304{
305 static const char * const feat_str[] = {
306 "PreF", "PPR", "X2APIC", "NX", "GT", "[5]",
307 "IA", "GA", "HE", "PC", NULL
308 };
309 int i;
310
311 printk(KERN_INFO "AMD-Vi: Enabling IOMMU at %s cap 0x%hx",
312 dev_name(&iommu->dev->dev), iommu->cap_ptr);
313
314 if (iommu->cap & (1 << IOMMU_CAP_EFR)) {
315 printk(KERN_CONT " extended features: ");
316 for (i = 0; feat_str[i]; ++i)
317 if (iommu_feature(iommu, (1ULL << i)))
318 printk(KERN_CONT " %s", feat_str[i]);
319 }
320 printk(KERN_CONT "\n");
321
322 iommu_feature_enable(iommu, CONTROL_IOMMU_EN);
323}
324
325static void iommu_disable(struct amd_iommu *iommu)
326{
327 /* Disable command buffer */
328 iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
329
330 /* Disable event logging and event interrupts */
331 iommu_feature_disable(iommu, CONTROL_EVT_INT_EN);
332 iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
333
334 /* Disable IOMMU hardware itself */
335 iommu_feature_disable(iommu, CONTROL_IOMMU_EN);
336}
337
338/*
339 * mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in
340 * the system has one.
341 */
342static u8 * __init iommu_map_mmio_space(u64 address)
343{
344 u8 *ret;
345
346 if (!request_mem_region(address, MMIO_REGION_LENGTH, "amd_iommu")) {
347 pr_err("AMD-Vi: Can not reserve memory region %llx for mmio\n",
348 address);
349 pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n");
350 return NULL;
351 }
352
353 ret = ioremap_nocache(address, MMIO_REGION_LENGTH);
354 if (ret != NULL)
355 return ret;
356
357 release_mem_region(address, MMIO_REGION_LENGTH);
358
359 return NULL;
360}
361
362static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu)
363{
364 if (iommu->mmio_base)
365 iounmap(iommu->mmio_base);
366 release_mem_region(iommu->mmio_phys, MMIO_REGION_LENGTH);
367}
368
369/****************************************************************************
370 *
371 * The functions below belong to the first pass of AMD IOMMU ACPI table
372 * parsing. In this pass we try to find out the highest device id this
373 * code has to handle. Upon this information the size of the shared data
374 * structures is determined later.
375 *
376 ****************************************************************************/
377
378/*
379 * This function calculates the length of a given IVHD entry
380 */
381static inline int ivhd_entry_length(u8 *ivhd)
382{
383 return 0x04 << (*ivhd >> 6);
384}
385
386/*
387 * This function reads the last device id the IOMMU has to handle from the PCI
388 * capability header for this IOMMU
389 */
390static int __init find_last_devid_on_pci(int bus, int dev, int fn, int cap_ptr)
391{
392 u32 cap;
393
394 cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET);
395 update_last_devid(calc_devid(MMIO_GET_BUS(cap), MMIO_GET_LD(cap)));
396
397 return 0;
398}
399
400/*
401 * After reading the highest device id from the IOMMU PCI capability header
402 * this function looks if there is a higher device id defined in the ACPI table
403 */
404static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
405{
406 u8 *p = (void *)h, *end = (void *)h;
407 struct ivhd_entry *dev;
408
409 p += sizeof(*h);
410 end += h->length;
411
412 find_last_devid_on_pci(PCI_BUS(h->devid),
413 PCI_SLOT(h->devid),
414 PCI_FUNC(h->devid),
415 h->cap_ptr);
416
417 while (p < end) {
418 dev = (struct ivhd_entry *)p;
419 switch (dev->type) {
420 case IVHD_DEV_SELECT:
421 case IVHD_DEV_RANGE_END:
422 case IVHD_DEV_ALIAS:
423 case IVHD_DEV_EXT_SELECT:
424 /* all the above subfield types refer to device ids */
425 update_last_devid(dev->devid);
426 break;
427 default:
428 break;
429 }
430 p += ivhd_entry_length(p);
431 }
432
433 WARN_ON(p != end);
434
435 return 0;
436}
437
438/*
439 * Iterate over all IVHD entries in the ACPI table and find the highest device
440 * id which we need to handle. This is the first of three functions which parse
441 * the ACPI table. So we check the checksum here.
442 */
443static int __init find_last_devid_acpi(struct acpi_table_header *table)
444{
445 int i;
446 u8 checksum = 0, *p = (u8 *)table, *end = (u8 *)table;
447 struct ivhd_header *h;
448
449 /*
450 * Validate checksum here so we don't need to do it when
451 * we actually parse the table
452 */
453 for (i = 0; i < table->length; ++i)
454 checksum += p[i];
455 if (checksum != 0) {
456 /* ACPI table corrupt */
457 amd_iommu_init_err = -ENODEV;
458 return 0;
459 }
460
461 p += IVRS_HEADER_LENGTH;
462
463 end += table->length;
464 while (p < end) {
465 h = (struct ivhd_header *)p;
466 switch (h->type) {
467 case ACPI_IVHD_TYPE:
468 find_last_devid_from_ivhd(h);
469 break;
470 default:
471 break;
472 }
473 p += h->length;
474 }
475 WARN_ON(p != end);
476
477 return 0;
478}
479
480/****************************************************************************
481 *
482 * The following functions belong the the code path which parses the ACPI table
483 * the second time. In this ACPI parsing iteration we allocate IOMMU specific
484 * data structures, initialize the device/alias/rlookup table and also
485 * basically initialize the hardware.
486 *
487 ****************************************************************************/
488
489/*
490 * Allocates the command buffer. This buffer is per AMD IOMMU. We can
491 * write commands to that buffer later and the IOMMU will execute them
492 * asynchronously
493 */
494static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
495{
496 u8 *cmd_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
497 get_order(CMD_BUFFER_SIZE));
498
499 if (cmd_buf == NULL)
500 return NULL;
501
502 iommu->cmd_buf_size = CMD_BUFFER_SIZE | CMD_BUFFER_UNINITIALIZED;
503
504 return cmd_buf;
505}
506
507/*
508 * This function resets the command buffer if the IOMMU stopped fetching
509 * commands from it.
510 */
511void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu)
512{
513 iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
514
515 writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET);
516 writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
517
518 iommu_feature_enable(iommu, CONTROL_CMDBUF_EN);
519}
520
521/*
522 * This function writes the command buffer address to the hardware and
523 * enables it.
524 */
525static void iommu_enable_command_buffer(struct amd_iommu *iommu)
526{
527 u64 entry;
528
529 BUG_ON(iommu->cmd_buf == NULL);
530
531 entry = (u64)virt_to_phys(iommu->cmd_buf);
532 entry |= MMIO_CMD_SIZE_512;
533
534 memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
535 &entry, sizeof(entry));
536
537 amd_iommu_reset_cmd_buffer(iommu);
538 iommu->cmd_buf_size &= ~(CMD_BUFFER_UNINITIALIZED);
539}
540
541static void __init free_command_buffer(struct amd_iommu *iommu)
542{
543 free_pages((unsigned long)iommu->cmd_buf,
544 get_order(iommu->cmd_buf_size & ~(CMD_BUFFER_UNINITIALIZED)));
545}
546
547/* allocates the memory where the IOMMU will log its events to */
548static u8 * __init alloc_event_buffer(struct amd_iommu *iommu)
549{
550 iommu->evt_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
551 get_order(EVT_BUFFER_SIZE));
552
553 if (iommu->evt_buf == NULL)
554 return NULL;
555
556 iommu->evt_buf_size = EVT_BUFFER_SIZE;
557
558 return iommu->evt_buf;
559}
560
561static void iommu_enable_event_buffer(struct amd_iommu *iommu)
562{
563 u64 entry;
564
565 BUG_ON(iommu->evt_buf == NULL);
566
567 entry = (u64)virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
568
569 memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET,
570 &entry, sizeof(entry));
571
572 /* set head and tail to zero manually */
573 writel(0x00, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
574 writel(0x00, iommu->mmio_base + MMIO_EVT_TAIL_OFFSET);
575
576 iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
577}
578
579static void __init free_event_buffer(struct amd_iommu *iommu)
580{
581 free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
582}
583
584/* sets a specific bit in the device table entry. */
585static void set_dev_entry_bit(u16 devid, u8 bit)
586{
587 int i = (bit >> 5) & 0x07;
588 int _bit = bit & 0x1f;
589
590 amd_iommu_dev_table[devid].data[i] |= (1 << _bit);
591}
592
593static int get_dev_entry_bit(u16 devid, u8 bit)
594{
595 int i = (bit >> 5) & 0x07;
596 int _bit = bit & 0x1f;
597
598 return (amd_iommu_dev_table[devid].data[i] & (1 << _bit)) >> _bit;
599}
600
601
602void amd_iommu_apply_erratum_63(u16 devid)
603{
604 int sysmgt;
605
606 sysmgt = get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1) |
607 (get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2) << 1);
608
609 if (sysmgt == 0x01)
610 set_dev_entry_bit(devid, DEV_ENTRY_IW);
611}
612
613/* Writes the specific IOMMU for a device into the rlookup table */
614static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid)
615{
616 amd_iommu_rlookup_table[devid] = iommu;
617}
618
619/*
620 * This function takes the device specific flags read from the ACPI
621 * table and sets up the device table entry with that information
622 */
623static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu,
624 u16 devid, u32 flags, u32 ext_flags)
625{
626 if (flags & ACPI_DEVFLAG_INITPASS)
627 set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS);
628 if (flags & ACPI_DEVFLAG_EXTINT)
629 set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS);
630 if (flags & ACPI_DEVFLAG_NMI)
631 set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS);
632 if (flags & ACPI_DEVFLAG_SYSMGT1)
633 set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1);
634 if (flags & ACPI_DEVFLAG_SYSMGT2)
635 set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2);
636 if (flags & ACPI_DEVFLAG_LINT0)
637 set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS);
638 if (flags & ACPI_DEVFLAG_LINT1)
639 set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS);
640
641 amd_iommu_apply_erratum_63(devid);
642
643 set_iommu_for_device(iommu, devid);
644}
645
646/*
647 * Reads the device exclusion range from ACPI and initialize IOMMU with
648 * it
649 */
650static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
651{
652 struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
653
654 if (!(m->flags & IVMD_FLAG_EXCL_RANGE))
655 return;
656
657 if (iommu) {
658 /*
659 * We only can configure exclusion ranges per IOMMU, not
660 * per device. But we can enable the exclusion range per
661 * device. This is done here
662 */
663 set_dev_entry_bit(m->devid, DEV_ENTRY_EX);
664 iommu->exclusion_start = m->range_start;
665 iommu->exclusion_length = m->range_length;
666 }
667}
668
669/*
670 * This function reads some important data from the IOMMU PCI space and
671 * initializes the driver data structure with it. It reads the hardware
672 * capabilities and the first/last device entries
673 */
674static void __init init_iommu_from_pci(struct amd_iommu *iommu)
675{
676 int cap_ptr = iommu->cap_ptr;
677 u32 range, misc, low, high;
678 int i, j;
679
680 pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
681 &iommu->cap);
682 pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
683 &range);
684 pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
685 &misc);
686
687 iommu->first_device = calc_devid(MMIO_GET_BUS(range),
688 MMIO_GET_FD(range));
689 iommu->last_device = calc_devid(MMIO_GET_BUS(range),
690 MMIO_GET_LD(range));
691 iommu->evt_msi_num = MMIO_MSI_NUM(misc);
692
693 if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
694 amd_iommu_iotlb_sup = false;
695
696 /* read extended feature bits */
697 low = readl(iommu->mmio_base + MMIO_EXT_FEATURES);
698 high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4);
699
700 iommu->features = ((u64)high << 32) | low;
701
702 if (!is_rd890_iommu(iommu->dev))
703 return;
704
705 /*
706 * Some rd890 systems may not be fully reconfigured by the BIOS, so
707 * it's necessary for us to store this information so it can be
708 * reprogrammed on resume
709 */
710
711 pci_read_config_dword(iommu->dev, iommu->cap_ptr + 4,
712 &iommu->stored_addr_lo);
713 pci_read_config_dword(iommu->dev, iommu->cap_ptr + 8,
714 &iommu->stored_addr_hi);
715
716 /* Low bit locks writes to configuration space */
717 iommu->stored_addr_lo &= ~1;
718
719 for (i = 0; i < 6; i++)
720 for (j = 0; j < 0x12; j++)
721 iommu->stored_l1[i][j] = iommu_read_l1(iommu, i, j);
722
723 for (i = 0; i < 0x83; i++)
724 iommu->stored_l2[i] = iommu_read_l2(iommu, i);
725}
726
727/*
728 * Takes a pointer to an AMD IOMMU entry in the ACPI table and
729 * initializes the hardware and our data structures with it.
730 */
731static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
732 struct ivhd_header *h)
733{
734 u8 *p = (u8 *)h;
735 u8 *end = p, flags = 0;
736 u16 devid = 0, devid_start = 0, devid_to = 0;
737 u32 dev_i, ext_flags = 0;
738 bool alias = false;
739 struct ivhd_entry *e;
740
741 /*
742 * First save the recommended feature enable bits from ACPI
743 */
744 iommu->acpi_flags = h->flags;
745
746 /*
747 * Done. Now parse the device entries
748 */
749 p += sizeof(struct ivhd_header);
750 end += h->length;
751
752
753 while (p < end) {
754 e = (struct ivhd_entry *)p;
755 switch (e->type) {
756 case IVHD_DEV_ALL:
757
758 DUMP_printk(" DEV_ALL\t\t\t first devid: %02x:%02x.%x"
759 " last device %02x:%02x.%x flags: %02x\n",
760 PCI_BUS(iommu->first_device),
761 PCI_SLOT(iommu->first_device),
762 PCI_FUNC(iommu->first_device),
763 PCI_BUS(iommu->last_device),
764 PCI_SLOT(iommu->last_device),
765 PCI_FUNC(iommu->last_device),
766 e->flags);
767
768 for (dev_i = iommu->first_device;
769 dev_i <= iommu->last_device; ++dev_i)
770 set_dev_entry_from_acpi(iommu, dev_i,
771 e->flags, 0);
772 break;
773 case IVHD_DEV_SELECT:
774
775 DUMP_printk(" DEV_SELECT\t\t\t devid: %02x:%02x.%x "
776 "flags: %02x\n",
777 PCI_BUS(e->devid),
778 PCI_SLOT(e->devid),
779 PCI_FUNC(e->devid),
780 e->flags);
781
782 devid = e->devid;
783 set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
784 break;
785 case IVHD_DEV_SELECT_RANGE_START:
786
787 DUMP_printk(" DEV_SELECT_RANGE_START\t "
788 "devid: %02x:%02x.%x flags: %02x\n",
789 PCI_BUS(e->devid),
790 PCI_SLOT(e->devid),
791 PCI_FUNC(e->devid),
792 e->flags);
793
794 devid_start = e->devid;
795 flags = e->flags;
796 ext_flags = 0;
797 alias = false;
798 break;
799 case IVHD_DEV_ALIAS:
800
801 DUMP_printk(" DEV_ALIAS\t\t\t devid: %02x:%02x.%x "
802 "flags: %02x devid_to: %02x:%02x.%x\n",
803 PCI_BUS(e->devid),
804 PCI_SLOT(e->devid),
805 PCI_FUNC(e->devid),
806 e->flags,
807 PCI_BUS(e->ext >> 8),
808 PCI_SLOT(e->ext >> 8),
809 PCI_FUNC(e->ext >> 8));
810
811 devid = e->devid;
812 devid_to = e->ext >> 8;
813 set_dev_entry_from_acpi(iommu, devid , e->flags, 0);
814 set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0);
815 amd_iommu_alias_table[devid] = devid_to;
816 break;
817 case IVHD_DEV_ALIAS_RANGE:
818
819 DUMP_printk(" DEV_ALIAS_RANGE\t\t "
820 "devid: %02x:%02x.%x flags: %02x "
821 "devid_to: %02x:%02x.%x\n",
822 PCI_BUS(e->devid),
823 PCI_SLOT(e->devid),
824 PCI_FUNC(e->devid),
825 e->flags,
826 PCI_BUS(e->ext >> 8),
827 PCI_SLOT(e->ext >> 8),
828 PCI_FUNC(e->ext >> 8));
829
830 devid_start = e->devid;
831 flags = e->flags;
832 devid_to = e->ext >> 8;
833 ext_flags = 0;
834 alias = true;
835 break;
836 case IVHD_DEV_EXT_SELECT:
837
838 DUMP_printk(" DEV_EXT_SELECT\t\t devid: %02x:%02x.%x "
839 "flags: %02x ext: %08x\n",
840 PCI_BUS(e->devid),
841 PCI_SLOT(e->devid),
842 PCI_FUNC(e->devid),
843 e->flags, e->ext);
844
845 devid = e->devid;
846 set_dev_entry_from_acpi(iommu, devid, e->flags,
847 e->ext);
848 break;
849 case IVHD_DEV_EXT_SELECT_RANGE:
850
851 DUMP_printk(" DEV_EXT_SELECT_RANGE\t devid: "
852 "%02x:%02x.%x flags: %02x ext: %08x\n",
853 PCI_BUS(e->devid),
854 PCI_SLOT(e->devid),
855 PCI_FUNC(e->devid),
856 e->flags, e->ext);
857
858 devid_start = e->devid;
859 flags = e->flags;
860 ext_flags = e->ext;
861 alias = false;
862 break;
863 case IVHD_DEV_RANGE_END:
864
865 DUMP_printk(" DEV_RANGE_END\t\t devid: %02x:%02x.%x\n",
866 PCI_BUS(e->devid),
867 PCI_SLOT(e->devid),
868 PCI_FUNC(e->devid));
869
870 devid = e->devid;
871 for (dev_i = devid_start; dev_i <= devid; ++dev_i) {
872 if (alias) {
873 amd_iommu_alias_table[dev_i] = devid_to;
874 set_dev_entry_from_acpi(iommu,
875 devid_to, flags, ext_flags);
876 }
877 set_dev_entry_from_acpi(iommu, dev_i,
878 flags, ext_flags);
879 }
880 break;
881 default:
882 break;
883 }
884
885 p += ivhd_entry_length(p);
886 }
887}
888
889/* Initializes the device->iommu mapping for the driver */
890static int __init init_iommu_devices(struct amd_iommu *iommu)
891{
892 u32 i;
893
894 for (i = iommu->first_device; i <= iommu->last_device; ++i)
895 set_iommu_for_device(iommu, i);
896
897 return 0;
898}
899
900static void __init free_iommu_one(struct amd_iommu *iommu)
901{
902 free_command_buffer(iommu);
903 free_event_buffer(iommu);
904 iommu_unmap_mmio_space(iommu);
905}
906
907static void __init free_iommu_all(void)
908{
909 struct amd_iommu *iommu, *next;
910
911 for_each_iommu_safe(iommu, next) {
912 list_del(&iommu->list);
913 free_iommu_one(iommu);
914 kfree(iommu);
915 }
916}
917
918/*
919 * This function clues the initialization function for one IOMMU
920 * together and also allocates the command buffer and programs the
921 * hardware. It does NOT enable the IOMMU. This is done afterwards.
922 */
923static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
924{
925 spin_lock_init(&iommu->lock);
926
927 /* Add IOMMU to internal data structures */
928 list_add_tail(&iommu->list, &amd_iommu_list);
929 iommu->index = amd_iommus_present++;
930
931 if (unlikely(iommu->index >= MAX_IOMMUS)) {
932 WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n");
933 return -ENOSYS;
934 }
935
936 /* Index is fine - add IOMMU to the array */
937 amd_iommus[iommu->index] = iommu;
938
939 /*
940 * Copy data from ACPI table entry to the iommu struct
941 */
942 iommu->dev = pci_get_bus_and_slot(PCI_BUS(h->devid), h->devid & 0xff);
943 if (!iommu->dev)
944 return 1;
945
946 iommu->cap_ptr = h->cap_ptr;
947 iommu->pci_seg = h->pci_seg;
948 iommu->mmio_phys = h->mmio_phys;
949 iommu->mmio_base = iommu_map_mmio_space(h->mmio_phys);
950 if (!iommu->mmio_base)
951 return -ENOMEM;
952
953 iommu->cmd_buf = alloc_command_buffer(iommu);
954 if (!iommu->cmd_buf)
955 return -ENOMEM;
956
957 iommu->evt_buf = alloc_event_buffer(iommu);
958 if (!iommu->evt_buf)
959 return -ENOMEM;
960
961 iommu->int_enabled = false;
962
963 init_iommu_from_pci(iommu);
964 init_iommu_from_acpi(iommu, h);
965 init_iommu_devices(iommu);
966
967 if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
968 amd_iommu_np_cache = true;
969
970 return pci_enable_device(iommu->dev);
971}
972
973/*
974 * Iterates over all IOMMU entries in the ACPI table, allocates the
975 * IOMMU structure and initializes it with init_iommu_one()
976 */
977static int __init init_iommu_all(struct acpi_table_header *table)
978{
979 u8 *p = (u8 *)table, *end = (u8 *)table;
980 struct ivhd_header *h;
981 struct amd_iommu *iommu;
982 int ret;
983
984 end += table->length;
985 p += IVRS_HEADER_LENGTH;
986
987 while (p < end) {
988 h = (struct ivhd_header *)p;
989 switch (*p) {
990 case ACPI_IVHD_TYPE:
991
992 DUMP_printk("device: %02x:%02x.%01x cap: %04x "
993 "seg: %d flags: %01x info %04x\n",
994 PCI_BUS(h->devid), PCI_SLOT(h->devid),
995 PCI_FUNC(h->devid), h->cap_ptr,
996 h->pci_seg, h->flags, h->info);
997 DUMP_printk(" mmio-addr: %016llx\n",
998 h->mmio_phys);
999
1000 iommu = kzalloc(sizeof(struct amd_iommu), GFP_KERNEL);
1001 if (iommu == NULL) {
1002 amd_iommu_init_err = -ENOMEM;
1003 return 0;
1004 }
1005
1006 ret = init_iommu_one(iommu, h);
1007 if (ret) {
1008 amd_iommu_init_err = ret;
1009 return 0;
1010 }
1011 break;
1012 default:
1013 break;
1014 }
1015 p += h->length;
1016
1017 }
1018 WARN_ON(p != end);
1019
1020 return 0;
1021}
1022
1023/****************************************************************************
1024 *
1025 * The following functions initialize the MSI interrupts for all IOMMUs
1026 * in the system. Its a bit challenging because there could be multiple
1027 * IOMMUs per PCI BDF but we can call pci_enable_msi(x) only once per
1028 * pci_dev.
1029 *
1030 ****************************************************************************/
1031
1032static int iommu_setup_msi(struct amd_iommu *iommu)
1033{
1034 int r;
1035
1036 if (pci_enable_msi(iommu->dev))
1037 return 1;
1038
1039 r = request_threaded_irq(iommu->dev->irq,
1040 amd_iommu_int_handler,
1041 amd_iommu_int_thread,
1042 0, "AMD-Vi",
1043 iommu->dev);
1044
1045 if (r) {
1046 pci_disable_msi(iommu->dev);
1047 return 1;
1048 }
1049
1050 iommu->int_enabled = true;
1051 iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
1052
1053 return 0;
1054}
1055
1056static int iommu_init_msi(struct amd_iommu *iommu)
1057{
1058 if (iommu->int_enabled)
1059 return 0;
1060
1061 if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
1062 return iommu_setup_msi(iommu);
1063
1064 return 1;
1065}
1066
1067/****************************************************************************
1068 *
1069 * The next functions belong to the third pass of parsing the ACPI
1070 * table. In this last pass the memory mapping requirements are
1071 * gathered (like exclusion and unity mapping reanges).
1072 *
1073 ****************************************************************************/
1074
1075static void __init free_unity_maps(void)
1076{
1077 struct unity_map_entry *entry, *next;
1078
1079 list_for_each_entry_safe(entry, next, &amd_iommu_unity_map, list) {
1080 list_del(&entry->list);
1081 kfree(entry);
1082 }
1083}
1084
1085/* called when we find an exclusion range definition in ACPI */
1086static int __init init_exclusion_range(struct ivmd_header *m)
1087{
1088 int i;
1089
1090 switch (m->type) {
1091 case ACPI_IVMD_TYPE:
1092 set_device_exclusion_range(m->devid, m);
1093 break;
1094 case ACPI_IVMD_TYPE_ALL:
1095 for (i = 0; i <= amd_iommu_last_bdf; ++i)
1096 set_device_exclusion_range(i, m);
1097 break;
1098 case ACPI_IVMD_TYPE_RANGE:
1099 for (i = m->devid; i <= m->aux; ++i)
1100 set_device_exclusion_range(i, m);
1101 break;
1102 default:
1103 break;
1104 }
1105
1106 return 0;
1107}
1108
1109/* called for unity map ACPI definition */
1110static int __init init_unity_map_range(struct ivmd_header *m)
1111{
1112 struct unity_map_entry *e = 0;
1113 char *s;
1114
1115 e = kzalloc(sizeof(*e), GFP_KERNEL);
1116 if (e == NULL)
1117 return -ENOMEM;
1118
1119 switch (m->type) {
1120 default:
1121 kfree(e);
1122 return 0;
1123 case ACPI_IVMD_TYPE:
1124 s = "IVMD_TYPEi\t\t\t";
1125 e->devid_start = e->devid_end = m->devid;
1126 break;
1127 case ACPI_IVMD_TYPE_ALL:
1128 s = "IVMD_TYPE_ALL\t\t";
1129 e->devid_start = 0;
1130 e->devid_end = amd_iommu_last_bdf;
1131 break;
1132 case ACPI_IVMD_TYPE_RANGE:
1133 s = "IVMD_TYPE_RANGE\t\t";
1134 e->devid_start = m->devid;
1135 e->devid_end = m->aux;
1136 break;
1137 }
1138 e->address_start = PAGE_ALIGN(m->range_start);
1139 e->address_end = e->address_start + PAGE_ALIGN(m->range_length);
1140 e->prot = m->flags >> 1;
1141
1142 DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x"
1143 " range_start: %016llx range_end: %016llx flags: %x\n", s,
1144 PCI_BUS(e->devid_start), PCI_SLOT(e->devid_start),
1145 PCI_FUNC(e->devid_start), PCI_BUS(e->devid_end),
1146 PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end),
1147 e->address_start, e->address_end, m->flags);
1148
1149 list_add_tail(&e->list, &amd_iommu_unity_map);
1150
1151 return 0;
1152}
1153
1154/* iterates over all memory definitions we find in the ACPI table */
1155static int __init init_memory_definitions(struct acpi_table_header *table)
1156{
1157 u8 *p = (u8 *)table, *end = (u8 *)table;
1158 struct ivmd_header *m;
1159
1160 end += table->length;
1161 p += IVRS_HEADER_LENGTH;
1162
1163 while (p < end) {
1164 m = (struct ivmd_header *)p;
1165 if (m->flags & IVMD_FLAG_EXCL_RANGE)
1166 init_exclusion_range(m);
1167 else if (m->flags & IVMD_FLAG_UNITY_MAP)
1168 init_unity_map_range(m);
1169
1170 p += m->length;
1171 }
1172
1173 return 0;
1174}
1175
1176/*
1177 * Init the device table to not allow DMA access for devices and
1178 * suppress all page faults
1179 */
1180static void init_device_table(void)
1181{
1182 u32 devid;
1183
1184 for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
1185 set_dev_entry_bit(devid, DEV_ENTRY_VALID);
1186 set_dev_entry_bit(devid, DEV_ENTRY_TRANSLATION);
1187 }
1188}
1189
1190static void iommu_init_flags(struct amd_iommu *iommu)
1191{
1192 iommu->acpi_flags & IVHD_FLAG_HT_TUN_EN_MASK ?
1193 iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
1194 iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
1195
1196 iommu->acpi_flags & IVHD_FLAG_PASSPW_EN_MASK ?
1197 iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
1198 iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
1199
1200 iommu->acpi_flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
1201 iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
1202 iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
1203
1204 iommu->acpi_flags & IVHD_FLAG_ISOC_EN_MASK ?
1205 iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
1206 iommu_feature_disable(iommu, CONTROL_ISOC_EN);
1207
1208 /*
1209 * make IOMMU memory accesses cache coherent
1210 */
1211 iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
1212}
1213
1214static void iommu_apply_resume_quirks(struct amd_iommu *iommu)
1215{
1216 int i, j;
1217 u32 ioc_feature_control;
1218 struct pci_dev *pdev = NULL;
1219
1220 /* RD890 BIOSes may not have completely reconfigured the iommu */
1221 if (!is_rd890_iommu(iommu->dev))
1222 return;
1223
1224 /*
1225 * First, we need to ensure that the iommu is enabled. This is
1226 * controlled by a register in the northbridge
1227 */
1228 pdev = pci_get_bus_and_slot(iommu->dev->bus->number, PCI_DEVFN(0, 0));
1229
1230 if (!pdev)
1231 return;
1232
1233 /* Select Northbridge indirect register 0x75 and enable writing */
1234 pci_write_config_dword(pdev, 0x60, 0x75 | (1 << 7));
1235 pci_read_config_dword(pdev, 0x64, &ioc_feature_control);
1236
1237 /* Enable the iommu */
1238 if (!(ioc_feature_control & 0x1))
1239 pci_write_config_dword(pdev, 0x64, ioc_feature_control | 1);
1240
1241 pci_dev_put(pdev);
1242
1243 /* Restore the iommu BAR */
1244 pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4,
1245 iommu->stored_addr_lo);
1246 pci_write_config_dword(iommu->dev, iommu->cap_ptr + 8,
1247 iommu->stored_addr_hi);
1248
1249 /* Restore the l1 indirect regs for each of the 6 l1s */
1250 for (i = 0; i < 6; i++)
1251 for (j = 0; j < 0x12; j++)
1252 iommu_write_l1(iommu, i, j, iommu->stored_l1[i][j]);
1253
1254 /* Restore the l2 indirect regs */
1255 for (i = 0; i < 0x83; i++)
1256 iommu_write_l2(iommu, i, iommu->stored_l2[i]);
1257
1258 /* Lock PCI setup registers */
1259 pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4,
1260 iommu->stored_addr_lo | 1);
1261}
1262
1263/*
1264 * This function finally enables all IOMMUs found in the system after
1265 * they have been initialized
1266 */
1267static void enable_iommus(void)
1268{
1269 struct amd_iommu *iommu;
1270
1271 for_each_iommu(iommu) {
1272 iommu_disable(iommu);
1273 iommu_init_flags(iommu);
1274 iommu_set_device_table(iommu);
1275 iommu_enable_command_buffer(iommu);
1276 iommu_enable_event_buffer(iommu);
1277 iommu_set_exclusion_range(iommu);
1278 iommu_init_msi(iommu);
1279 iommu_enable(iommu);
1280 iommu_flush_all_caches(iommu);
1281 }
1282}
1283
1284static void disable_iommus(void)
1285{
1286 struct amd_iommu *iommu;
1287
1288 for_each_iommu(iommu)
1289 iommu_disable(iommu);
1290}
1291
1292/*
1293 * Suspend/Resume support
1294 * disable suspend until real resume implemented
1295 */
1296
1297static void amd_iommu_resume(void)
1298{
1299 struct amd_iommu *iommu;
1300
1301 for_each_iommu(iommu)
1302 iommu_apply_resume_quirks(iommu);
1303
1304 /* re-load the hardware */
1305 enable_iommus();
1306
1307 /*
1308 * we have to flush after the IOMMUs are enabled because a
1309 * disabled IOMMU will never execute the commands we send
1310 */
1311 for_each_iommu(iommu)
1312 iommu_flush_all_caches(iommu);
1313}
1314
1315static int amd_iommu_suspend(void)
1316{
1317 /* disable IOMMUs to go out of the way for BIOS */
1318 disable_iommus();
1319
1320 return 0;
1321}
1322
1323static struct syscore_ops amd_iommu_syscore_ops = {
1324 .suspend = amd_iommu_suspend,
1325 .resume = amd_iommu_resume,
1326};
1327
1328/*
1329 * This is the core init function for AMD IOMMU hardware in the system.
1330 * This function is called from the generic x86 DMA layer initialization
1331 * code.
1332 *
1333 * This function basically parses the ACPI table for AMD IOMMU (IVRS)
1334 * three times:
1335 *
1336 * 1 pass) Find the highest PCI device id the driver has to handle.
1337 * Upon this information the size of the data structures is
1338 * determined that needs to be allocated.
1339 *
1340 * 2 pass) Initialize the data structures just allocated with the
1341 * information in the ACPI table about available AMD IOMMUs
1342 * in the system. It also maps the PCI devices in the
1343 * system to specific IOMMUs
1344 *
1345 * 3 pass) After the basic data structures are allocated and
1346 * initialized we update them with information about memory
1347 * remapping requirements parsed out of the ACPI table in
1348 * this last pass.
1349 *
1350 * After that the hardware is initialized and ready to go. In the last
1351 * step we do some Linux specific things like registering the driver in
1352 * the dma_ops interface and initializing the suspend/resume support
1353 * functions. Finally it prints some information about AMD IOMMUs and
1354 * the driver state and enables the hardware.
1355 */
1356static int __init amd_iommu_init(void)
1357{
1358 int i, ret = 0;
1359
1360 /*
1361 * First parse ACPI tables to find the largest Bus/Dev/Func
1362 * we need to handle. Upon this information the shared data
1363 * structures for the IOMMUs in the system will be allocated
1364 */
1365 if (acpi_table_parse("IVRS", find_last_devid_acpi) != 0)
1366 return -ENODEV;
1367
1368 ret = amd_iommu_init_err;
1369 if (ret)
1370 goto out;
1371
1372 dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE);
1373 alias_table_size = tbl_size(ALIAS_TABLE_ENTRY_SIZE);
1374 rlookup_table_size = tbl_size(RLOOKUP_TABLE_ENTRY_SIZE);
1375
1376 ret = -ENOMEM;
1377
1378 /* Device table - directly used by all IOMMUs */
1379 amd_iommu_dev_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
1380 get_order(dev_table_size));
1381 if (amd_iommu_dev_table == NULL)
1382 goto out;
1383
1384 /*
1385 * Alias table - map PCI Bus/Dev/Func to Bus/Dev/Func the
1386 * IOMMU see for that device
1387 */
1388 amd_iommu_alias_table = (void *)__get_free_pages(GFP_KERNEL,
1389 get_order(alias_table_size));
1390 if (amd_iommu_alias_table == NULL)
1391 goto free;
1392
1393 /* IOMMU rlookup table - find the IOMMU for a specific device */
1394 amd_iommu_rlookup_table = (void *)__get_free_pages(
1395 GFP_KERNEL | __GFP_ZERO,
1396 get_order(rlookup_table_size));
1397 if (amd_iommu_rlookup_table == NULL)
1398 goto free;
1399
1400 amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages(
1401 GFP_KERNEL | __GFP_ZERO,
1402 get_order(MAX_DOMAIN_ID/8));
1403 if (amd_iommu_pd_alloc_bitmap == NULL)
1404 goto free;
1405
1406 /* init the device table */
1407 init_device_table();
1408
1409 /*
1410 * let all alias entries point to itself
1411 */
1412 for (i = 0; i <= amd_iommu_last_bdf; ++i)
1413 amd_iommu_alias_table[i] = i;
1414
1415 /*
1416 * never allocate domain 0 because its used as the non-allocated and
1417 * error value placeholder
1418 */
1419 amd_iommu_pd_alloc_bitmap[0] = 1;
1420
1421 spin_lock_init(&amd_iommu_pd_lock);
1422
1423 /*
1424 * now the data structures are allocated and basically initialized
1425 * start the real acpi table scan
1426 */
1427 ret = -ENODEV;
1428 if (acpi_table_parse("IVRS", init_iommu_all) != 0)
1429 goto free;
1430
1431 if (amd_iommu_init_err) {
1432 ret = amd_iommu_init_err;
1433 goto free;
1434 }
1435
1436 if (acpi_table_parse("IVRS", init_memory_definitions) != 0)
1437 goto free;
1438
1439 if (amd_iommu_init_err) {
1440 ret = amd_iommu_init_err;
1441 goto free;
1442 }
1443
1444 ret = amd_iommu_init_devices();
1445 if (ret)
1446 goto free;
1447
1448 enable_iommus();
1449
1450 if (iommu_pass_through)
1451 ret = amd_iommu_init_passthrough();
1452 else
1453 ret = amd_iommu_init_dma_ops();
1454
1455 if (ret)
1456 goto free_disable;
1457
1458 amd_iommu_init_api();
1459
1460 amd_iommu_init_notifier();
1461
1462 register_syscore_ops(&amd_iommu_syscore_ops);
1463
1464 if (iommu_pass_through)
1465 goto out;
1466
1467 if (amd_iommu_unmap_flush)
1468 printk(KERN_INFO "AMD-Vi: IO/TLB flush on unmap enabled\n");
1469 else
1470 printk(KERN_INFO "AMD-Vi: Lazy IO/TLB flushing enabled\n");
1471
1472 x86_platform.iommu_shutdown = disable_iommus;
1473out:
1474 return ret;
1475
1476free_disable:
1477 disable_iommus();
1478
1479free:
1480 amd_iommu_uninit_devices();
1481
1482 free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
1483 get_order(MAX_DOMAIN_ID/8));
1484
1485 free_pages((unsigned long)amd_iommu_rlookup_table,
1486 get_order(rlookup_table_size));
1487
1488 free_pages((unsigned long)amd_iommu_alias_table,
1489 get_order(alias_table_size));
1490
1491 free_pages((unsigned long)amd_iommu_dev_table,
1492 get_order(dev_table_size));
1493
1494 free_iommu_all();
1495
1496 free_unity_maps();
1497
1498#ifdef CONFIG_GART_IOMMU
1499 /*
1500 * We failed to initialize the AMD IOMMU - try fallback to GART
1501 * if possible.
1502 */
1503 gart_iommu_init();
1504
1505#endif
1506
1507 goto out;
1508}
1509
1510/****************************************************************************
1511 *
1512 * Early detect code. This code runs at IOMMU detection time in the DMA
1513 * layer. It just looks if there is an IVRS ACPI table to detect AMD
1514 * IOMMUs
1515 *
1516 ****************************************************************************/
1517static int __init early_amd_iommu_detect(struct acpi_table_header *table)
1518{
1519 return 0;
1520}
1521
1522int __init amd_iommu_detect(void)
1523{
1524 if (no_iommu || (iommu_detected && !gart_iommu_aperture))
1525 return -ENODEV;
1526
1527 if (amd_iommu_disabled)
1528 return -ENODEV;
1529
1530 if (acpi_table_parse("IVRS", early_amd_iommu_detect) == 0) {
1531 iommu_detected = 1;
1532 amd_iommu_detected = 1;
1533 x86_init.iommu.iommu_init = amd_iommu_init;
1534
1535 /* Make sure ACS will be enabled */
1536 pci_request_acs();
1537 return 1;
1538 }
1539 return -ENODEV;
1540}
1541
1542/****************************************************************************
1543 *
1544 * Parsing functions for the AMD IOMMU specific kernel command line
1545 * options.
1546 *
1547 ****************************************************************************/
1548
1549static int __init parse_amd_iommu_dump(char *str)
1550{
1551 amd_iommu_dump = true;
1552
1553 return 1;
1554}
1555
1556static int __init parse_amd_iommu_options(char *str)
1557{
1558 for (; *str; ++str) {
1559 if (strncmp(str, "fullflush", 9) == 0)
1560 amd_iommu_unmap_flush = true;
1561 if (strncmp(str, "off", 3) == 0)
1562 amd_iommu_disabled = true;
1563 }
1564
1565 return 1;
1566}
1567
1568__setup("amd_iommu_dump", parse_amd_iommu_dump);
1569__setup("amd_iommu=", parse_amd_iommu_options);
1570
1571IOMMU_INIT_FINISH(amd_iommu_detect,
1572 gart_iommu_hole_init,
1573 0,
1574 0);
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
new file mode 100644
index 00000000000..7ffaa64410b
--- /dev/null
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -0,0 +1,54 @@
1/*
2 * Copyright (C) 2009-2010 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#ifndef _ASM_X86_AMD_IOMMU_PROTO_H
20#define _ASM_X86_AMD_IOMMU_PROTO_H
21
22#include "amd_iommu_types.h"
23
24extern int amd_iommu_init_dma_ops(void);
25extern int amd_iommu_init_passthrough(void);
26extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
27extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
28extern void amd_iommu_apply_erratum_63(u16 devid);
29extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
30extern int amd_iommu_init_devices(void);
31extern void amd_iommu_uninit_devices(void);
32extern void amd_iommu_init_notifier(void);
33extern void amd_iommu_init_api(void);
34#ifndef CONFIG_AMD_IOMMU_STATS
35
36static inline void amd_iommu_stats_init(void) { }
37
38#endif /* !CONFIG_AMD_IOMMU_STATS */
39
40static inline bool is_rd890_iommu(struct pci_dev *pdev)
41{
42 return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
43 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
44}
45
46static inline bool iommu_feature(struct amd_iommu *iommu, u64 f)
47{
48 if (!(iommu->cap & (1 << IOMMU_CAP_EFR)))
49 return false;
50
51 return !!(iommu->features & f);
52}
53
54#endif /* _ASM_X86_AMD_IOMMU_PROTO_H */
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
new file mode 100644
index 00000000000..4c998299541
--- /dev/null
+++ b/drivers/iommu/amd_iommu_types.h
@@ -0,0 +1,580 @@
1/*
2 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
4 * Leo Duran <leo.duran@amd.com>
5 *
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.
9 *
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.
14 *
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
18 */
19
20#ifndef _ASM_X86_AMD_IOMMU_TYPES_H
21#define _ASM_X86_AMD_IOMMU_TYPES_H
22
23#include <linux/types.h>
24#include <linux/mutex.h>
25#include <linux/list.h>
26#include <linux/spinlock.h>
27
28/*
29 * Maximum number of IOMMUs supported
30 */
31#define MAX_IOMMUS 32
32
33/*
34 * some size calculation constants
35 */
36#define DEV_TABLE_ENTRY_SIZE 32
37#define ALIAS_TABLE_ENTRY_SIZE 2
38#define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *))
39
40/* Length of the MMIO region for the AMD IOMMU */
41#define MMIO_REGION_LENGTH 0x4000
42
43/* Capability offsets used by the driver */
44#define MMIO_CAP_HDR_OFFSET 0x00
45#define MMIO_RANGE_OFFSET 0x0c
46#define MMIO_MISC_OFFSET 0x10
47
48/* Masks, shifts and macros to parse the device range capability */
49#define MMIO_RANGE_LD_MASK 0xff000000
50#define MMIO_RANGE_FD_MASK 0x00ff0000
51#define MMIO_RANGE_BUS_MASK 0x0000ff00
52#define MMIO_RANGE_LD_SHIFT 24
53#define MMIO_RANGE_FD_SHIFT 16
54#define MMIO_RANGE_BUS_SHIFT 8
55#define MMIO_GET_LD(x) (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
56#define MMIO_GET_FD(x) (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
57#define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
58#define MMIO_MSI_NUM(x) ((x) & 0x1f)
59
60/* Flag masks for the AMD IOMMU exclusion range */
61#define MMIO_EXCL_ENABLE_MASK 0x01ULL
62#define MMIO_EXCL_ALLOW_MASK 0x02ULL
63
64/* Used offsets into the MMIO space */
65#define MMIO_DEV_TABLE_OFFSET 0x0000
66#define MMIO_CMD_BUF_OFFSET 0x0008
67#define MMIO_EVT_BUF_OFFSET 0x0010
68#define MMIO_CONTROL_OFFSET 0x0018
69#define MMIO_EXCL_BASE_OFFSET 0x0020
70#define MMIO_EXCL_LIMIT_OFFSET 0x0028
71#define MMIO_EXT_FEATURES 0x0030
72#define MMIO_CMD_HEAD_OFFSET 0x2000
73#define MMIO_CMD_TAIL_OFFSET 0x2008
74#define MMIO_EVT_HEAD_OFFSET 0x2010
75#define MMIO_EVT_TAIL_OFFSET 0x2018
76#define MMIO_STATUS_OFFSET 0x2020
77
78
79/* Extended Feature Bits */
80#define FEATURE_PREFETCH (1ULL<<0)
81#define FEATURE_PPR (1ULL<<1)
82#define FEATURE_X2APIC (1ULL<<2)
83#define FEATURE_NX (1ULL<<3)
84#define FEATURE_GT (1ULL<<4)
85#define FEATURE_IA (1ULL<<6)
86#define FEATURE_GA (1ULL<<7)
87#define FEATURE_HE (1ULL<<8)
88#define FEATURE_PC (1ULL<<9)
89
90/* MMIO status bits */
91#define MMIO_STATUS_COM_WAIT_INT_MASK 0x04
92
93/* event logging constants */
94#define EVENT_ENTRY_SIZE 0x10
95#define EVENT_TYPE_SHIFT 28
96#define EVENT_TYPE_MASK 0xf
97#define EVENT_TYPE_ILL_DEV 0x1
98#define EVENT_TYPE_IO_FAULT 0x2
99#define EVENT_TYPE_DEV_TAB_ERR 0x3
100#define EVENT_TYPE_PAGE_TAB_ERR 0x4
101#define EVENT_TYPE_ILL_CMD 0x5
102#define EVENT_TYPE_CMD_HARD_ERR 0x6
103#define EVENT_TYPE_IOTLB_INV_TO 0x7
104#define EVENT_TYPE_INV_DEV_REQ 0x8
105#define EVENT_DEVID_MASK 0xffff
106#define EVENT_DEVID_SHIFT 0
107#define EVENT_DOMID_MASK 0xffff
108#define EVENT_DOMID_SHIFT 0
109#define EVENT_FLAGS_MASK 0xfff
110#define EVENT_FLAGS_SHIFT 0x10
111
112/* feature control bits */
113#define CONTROL_IOMMU_EN 0x00ULL
114#define CONTROL_HT_TUN_EN 0x01ULL
115#define CONTROL_EVT_LOG_EN 0x02ULL
116#define CONTROL_EVT_INT_EN 0x03ULL
117#define CONTROL_COMWAIT_EN 0x04ULL
118#define CONTROL_PASSPW_EN 0x08ULL
119#define CONTROL_RESPASSPW_EN 0x09ULL
120#define CONTROL_COHERENT_EN 0x0aULL
121#define CONTROL_ISOC_EN 0x0bULL
122#define CONTROL_CMDBUF_EN 0x0cULL
123#define CONTROL_PPFLOG_EN 0x0dULL
124#define CONTROL_PPFINT_EN 0x0eULL
125
126/* command specific defines */
127#define CMD_COMPL_WAIT 0x01
128#define CMD_INV_DEV_ENTRY 0x02
129#define CMD_INV_IOMMU_PAGES 0x03
130#define CMD_INV_IOTLB_PAGES 0x04
131#define CMD_INV_ALL 0x08
132
133#define CMD_COMPL_WAIT_STORE_MASK 0x01
134#define CMD_COMPL_WAIT_INT_MASK 0x02
135#define CMD_INV_IOMMU_PAGES_SIZE_MASK 0x01
136#define CMD_INV_IOMMU_PAGES_PDE_MASK 0x02
137
138#define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL
139
140/* macros and definitions for device table entries */
141#define DEV_ENTRY_VALID 0x00
142#define DEV_ENTRY_TRANSLATION 0x01
143#define DEV_ENTRY_IR 0x3d
144#define DEV_ENTRY_IW 0x3e
145#define DEV_ENTRY_NO_PAGE_FAULT 0x62
146#define DEV_ENTRY_EX 0x67
147#define DEV_ENTRY_SYSMGT1 0x68
148#define DEV_ENTRY_SYSMGT2 0x69
149#define DEV_ENTRY_INIT_PASS 0xb8
150#define DEV_ENTRY_EINT_PASS 0xb9
151#define DEV_ENTRY_NMI_PASS 0xba
152#define DEV_ENTRY_LINT0_PASS 0xbe
153#define DEV_ENTRY_LINT1_PASS 0xbf
154#define DEV_ENTRY_MODE_MASK 0x07
155#define DEV_ENTRY_MODE_SHIFT 0x09
156
157/* constants to configure the command buffer */
158#define CMD_BUFFER_SIZE 8192
159#define CMD_BUFFER_UNINITIALIZED 1
160#define CMD_BUFFER_ENTRIES 512
161#define MMIO_CMD_SIZE_SHIFT 56
162#define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
163
164/* constants for event buffer handling */
165#define EVT_BUFFER_SIZE 8192 /* 512 entries */
166#define EVT_LEN_MASK (0x9ULL << 56)
167
168#define PAGE_MODE_NONE 0x00
169#define PAGE_MODE_1_LEVEL 0x01
170#define PAGE_MODE_2_LEVEL 0x02
171#define PAGE_MODE_3_LEVEL 0x03
172#define PAGE_MODE_4_LEVEL 0x04
173#define PAGE_MODE_5_LEVEL 0x05
174#define PAGE_MODE_6_LEVEL 0x06
175
176#define PM_LEVEL_SHIFT(x) (12 + ((x) * 9))
177#define PM_LEVEL_SIZE(x) (((x) < 6) ? \
178 ((1ULL << PM_LEVEL_SHIFT((x))) - 1): \
179 (0xffffffffffffffffULL))
180#define PM_LEVEL_INDEX(x, a) (((a) >> PM_LEVEL_SHIFT((x))) & 0x1ffULL)
181#define PM_LEVEL_ENC(x) (((x) << 9) & 0xe00ULL)
182#define PM_LEVEL_PDE(x, a) ((a) | PM_LEVEL_ENC((x)) | \
183 IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
184#define PM_PTE_LEVEL(pte) (((pte) >> 9) & 0x7ULL)
185
186#define PM_MAP_4k 0
187#define PM_ADDR_MASK 0x000ffffffffff000ULL
188#define PM_MAP_MASK(lvl) (PM_ADDR_MASK & \
189 (~((1ULL << (12 + ((lvl) * 9))) - 1)))
190#define PM_ALIGNED(lvl, addr) ((PM_MAP_MASK(lvl) & (addr)) == (addr))
191
192/*
193 * Returns the page table level to use for a given page size
194 * Pagesize is expected to be a power-of-two
195 */
196#define PAGE_SIZE_LEVEL(pagesize) \
197 ((__ffs(pagesize) - 12) / 9)
198/*
199 * Returns the number of ptes to use for a given page size
200 * Pagesize is expected to be a power-of-two
201 */
202#define PAGE_SIZE_PTE_COUNT(pagesize) \
203 (1ULL << ((__ffs(pagesize) - 12) % 9))
204
205/*
206 * Aligns a given io-virtual address to a given page size
207 * Pagesize is expected to be a power-of-two
208 */
209#define PAGE_SIZE_ALIGN(address, pagesize) \
210 ((address) & ~((pagesize) - 1))
211/*
212 * Creates an IOMMU PTE for an address an a given pagesize
213 * The PTE has no permission bits set
214 * Pagesize is expected to be a power-of-two larger than 4096
215 */
216#define PAGE_SIZE_PTE(address, pagesize) \
217 (((address) | ((pagesize) - 1)) & \
218 (~(pagesize >> 1)) & PM_ADDR_MASK)
219
220/*
221 * Takes a PTE value with mode=0x07 and returns the page size it maps
222 */
223#define PTE_PAGE_SIZE(pte) \
224 (1ULL << (1 + ffz(((pte) | 0xfffULL))))
225
226#define IOMMU_PTE_P (1ULL << 0)
227#define IOMMU_PTE_TV (1ULL << 1)
228#define IOMMU_PTE_U (1ULL << 59)
229#define IOMMU_PTE_FC (1ULL << 60)
230#define IOMMU_PTE_IR (1ULL << 61)
231#define IOMMU_PTE_IW (1ULL << 62)
232
233#define DTE_FLAG_IOTLB 0x01
234
235#define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
236#define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P)
237#define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK))
238#define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
239
240#define IOMMU_PROT_MASK 0x03
241#define IOMMU_PROT_IR 0x01
242#define IOMMU_PROT_IW 0x02
243
244/* IOMMU capabilities */
245#define IOMMU_CAP_IOTLB 24
246#define IOMMU_CAP_NPCACHE 26
247#define IOMMU_CAP_EFR 27
248
249#define MAX_DOMAIN_ID 65536
250
251/* FIXME: move this macro to <linux/pci.h> */
252#define PCI_BUS(x) (((x) >> 8) & 0xff)
253
254/* Protection domain flags */
255#define PD_DMA_OPS_MASK (1UL << 0) /* domain used for dma_ops */
256#define PD_DEFAULT_MASK (1UL << 1) /* domain is a default dma_ops
257 domain for an IOMMU */
258#define PD_PASSTHROUGH_MASK (1UL << 2) /* domain has no page
259 translation */
260
261extern bool amd_iommu_dump;
262#define DUMP_printk(format, arg...) \
263 do { \
264 if (amd_iommu_dump) \
265 printk(KERN_INFO "AMD-Vi: " format, ## arg); \
266 } while(0);
267
268/* global flag if IOMMUs cache non-present entries */
269extern bool amd_iommu_np_cache;
270/* Only true if all IOMMUs support device IOTLBs */
271extern bool amd_iommu_iotlb_sup;
272
273/*
274 * Make iterating over all IOMMUs easier
275 */
276#define for_each_iommu(iommu) \
277 list_for_each_entry((iommu), &amd_iommu_list, list)
278#define for_each_iommu_safe(iommu, next) \
279 list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list)
280
281#define APERTURE_RANGE_SHIFT 27 /* 128 MB */
282#define APERTURE_RANGE_SIZE (1ULL << APERTURE_RANGE_SHIFT)
283#define APERTURE_RANGE_PAGES (APERTURE_RANGE_SIZE >> PAGE_SHIFT)
284#define APERTURE_MAX_RANGES 32 /* allows 4GB of DMA address space */
285#define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT)
286#define APERTURE_PAGE_INDEX(a) (((a) >> 21) & 0x3fULL)
287
288/*
289 * This structure contains generic data for IOMMU protection domains
290 * independent of their use.
291 */
292struct protection_domain {
293 struct list_head list; /* for list of all protection domains */
294 struct list_head dev_list; /* List of all devices in this domain */
295 spinlock_t lock; /* mostly used to lock the page table*/
296 struct mutex api_lock; /* protect page tables in the iommu-api path */
297 u16 id; /* the domain id written to the device table */
298 int mode; /* paging mode (0-6 levels) */
299 u64 *pt_root; /* page table root pointer */
300 unsigned long flags; /* flags to find out type of domain */
301 bool updated; /* complete domain flush required */
302 unsigned dev_cnt; /* devices assigned to this domain */
303 unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */
304 void *priv; /* private data */
305
306};
307
308/*
309 * This struct contains device specific data for the IOMMU
310 */
311struct iommu_dev_data {
312 struct list_head list; /* For domain->dev_list */
313 struct device *dev; /* Device this data belong to */
314 struct device *alias; /* The Alias Device */
315 struct protection_domain *domain; /* Domain the device is bound to */
316 atomic_t bind; /* Domain attach reverent count */
317};
318
319/*
320 * For dynamic growth the aperture size is split into ranges of 128MB of
321 * DMA address space each. This struct represents one such range.
322 */
323struct aperture_range {
324
325 /* address allocation bitmap */
326 unsigned long *bitmap;
327
328 /*
329 * Array of PTE pages for the aperture. In this array we save all the
330 * leaf pages of the domain page table used for the aperture. This way
331 * we don't need to walk the page table to find a specific PTE. We can
332 * just calculate its address in constant time.
333 */
334 u64 *pte_pages[64];
335
336 unsigned long offset;
337};
338
339/*
340 * Data container for a dma_ops specific protection domain
341 */
342struct dma_ops_domain {
343 struct list_head list;
344
345 /* generic protection domain information */
346 struct protection_domain domain;
347
348 /* size of the aperture for the mappings */
349 unsigned long aperture_size;
350
351 /* address we start to search for free addresses */
352 unsigned long next_address;
353
354 /* address space relevant data */
355 struct aperture_range *aperture[APERTURE_MAX_RANGES];
356
357 /* This will be set to true when TLB needs to be flushed */
358 bool need_flush;
359
360 /*
361 * if this is a preallocated domain, keep the device for which it was
362 * preallocated in this variable
363 */
364 u16 target_dev;
365};
366
367/*
368 * Structure where we save information about one hardware AMD IOMMU in the
369 * system.
370 */
371struct amd_iommu {
372 struct list_head list;
373
374 /* Index within the IOMMU array */
375 int index;
376
377 /* locks the accesses to the hardware */
378 spinlock_t lock;
379
380 /* Pointer to PCI device of this IOMMU */
381 struct pci_dev *dev;
382
383 /* physical address of MMIO space */
384 u64 mmio_phys;
385 /* virtual address of MMIO space */
386 u8 *mmio_base;
387
388 /* capabilities of that IOMMU read from ACPI */
389 u32 cap;
390
391 /* flags read from acpi table */
392 u8 acpi_flags;
393
394 /* Extended features */
395 u64 features;
396
397 /*
398 * Capability pointer. There could be more than one IOMMU per PCI
399 * device function if there are more than one AMD IOMMU capability
400 * pointers.
401 */
402 u16 cap_ptr;
403
404 /* pci domain of this IOMMU */
405 u16 pci_seg;
406
407 /* first device this IOMMU handles. read from PCI */
408 u16 first_device;
409 /* last device this IOMMU handles. read from PCI */
410 u16 last_device;
411
412 /* start of exclusion range of that IOMMU */
413 u64 exclusion_start;
414 /* length of exclusion range of that IOMMU */
415 u64 exclusion_length;
416
417 /* command buffer virtual address */
418 u8 *cmd_buf;
419 /* size of command buffer */
420 u32 cmd_buf_size;
421
422 /* size of event buffer */
423 u32 evt_buf_size;
424 /* event buffer virtual address */
425 u8 *evt_buf;
426 /* MSI number for event interrupt */
427 u16 evt_msi_num;
428
429 /* true if interrupts for this IOMMU are already enabled */
430 bool int_enabled;
431
432 /* if one, we need to send a completion wait command */
433 bool need_sync;
434
435 /* default dma_ops domain for that IOMMU */
436 struct dma_ops_domain *default_dom;
437
438 /*
439 * We can't rely on the BIOS to restore all values on reinit, so we
440 * need to stash them
441 */
442
443 /* The iommu BAR */
444 u32 stored_addr_lo;
445 u32 stored_addr_hi;
446
447 /*
448 * Each iommu has 6 l1s, each of which is documented as having 0x12
449 * registers
450 */
451 u32 stored_l1[6][0x12];
452
453 /* The l2 indirect registers */
454 u32 stored_l2[0x83];
455};
456
457/*
458 * List with all IOMMUs in the system. This list is not locked because it is
459 * only written and read at driver initialization or suspend time
460 */
461extern struct list_head amd_iommu_list;
462
463/*
464 * Array with pointers to each IOMMU struct
465 * The indices are referenced in the protection domains
466 */
467extern struct amd_iommu *amd_iommus[MAX_IOMMUS];
468
469/* Number of IOMMUs present in the system */
470extern int amd_iommus_present;
471
472/*
473 * Declarations for the global list of all protection domains
474 */
475extern spinlock_t amd_iommu_pd_lock;
476extern struct list_head amd_iommu_pd_list;
477
478/*
479 * Structure defining one entry in the device table
480 */
481struct dev_table_entry {
482 u32 data[8];
483};
484
485/*
486 * One entry for unity mappings parsed out of the ACPI table.
487 */
488struct unity_map_entry {
489 struct list_head list;
490
491 /* starting device id this entry is used for (including) */
492 u16 devid_start;
493 /* end device id this entry is used for (including) */
494 u16 devid_end;
495
496 /* start address to unity map (including) */
497 u64 address_start;
498 /* end address to unity map (including) */
499 u64 address_end;
500
501 /* required protection */
502 int prot;
503};
504
505/*
506 * List of all unity mappings. It is not locked because as runtime it is only
507 * read. It is created at ACPI table parsing time.
508 */
509extern struct list_head amd_iommu_unity_map;
510
511/*
512 * Data structures for device handling
513 */
514
515/*
516 * Device table used by hardware. Read and write accesses by software are
517 * locked with the amd_iommu_pd_table lock.
518 */
519extern struct dev_table_entry *amd_iommu_dev_table;
520
521/*
522 * Alias table to find requestor ids to device ids. Not locked because only
523 * read on runtime.
524 */
525extern u16 *amd_iommu_alias_table;
526
527/*
528 * Reverse lookup table to find the IOMMU which translates a specific device.
529 */
530extern struct amd_iommu **amd_iommu_rlookup_table;
531
532/* size of the dma_ops aperture as power of 2 */
533extern unsigned amd_iommu_aperture_order;
534
535/* largest PCI device id we expect translation requests for */
536extern u16 amd_iommu_last_bdf;
537
538/* allocation bitmap for domain ids */
539extern unsigned long *amd_iommu_pd_alloc_bitmap;
540
541/*
542 * If true, the addresses will be flushed on unmap time, not when
543 * they are reused
544 */
545extern bool amd_iommu_unmap_flush;
546
547/* takes bus and device/function and returns the device id
548 * FIXME: should that be in generic PCI code? */
549static inline u16 calc_devid(u8 bus, u8 devfn)
550{
551 return (((u16)bus) << 8) | devfn;
552}
553
554#ifdef CONFIG_AMD_IOMMU_STATS
555
556struct __iommu_counter {
557 char *name;
558 struct dentry *dent;
559 u64 value;
560};
561
562#define DECLARE_STATS_COUNTER(nm) \
563 static struct __iommu_counter nm = { \
564 .name = #nm, \
565 }
566
567#define INC_STATS_COUNTER(name) name.value += 1
568#define ADD_STATS_COUNTER(name, x) name.value += (x)
569#define SUB_STATS_COUNTER(name, x) name.value -= (x)
570
571#else /* CONFIG_AMD_IOMMU_STATS */
572
573#define DECLARE_STATS_COUNTER(name)
574#define INC_STATS_COUNTER(name)
575#define ADD_STATS_COUNTER(name, x)
576#define SUB_STATS_COUNTER(name, x)
577
578#endif /* CONFIG_AMD_IOMMU_STATS */
579
580#endif /* _ASM_X86_AMD_IOMMU_TYPES_H */
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