Commit | Line | Data |
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ba395927 KA |
1 | /* |
2 | * Copyright (c) 2006, Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
98bcef56 | 17 | * Copyright (C) 2006-2008 Intel Corporation |
18 | * Author: Ashok Raj <ashok.raj@intel.com> | |
19 | * Author: Shaohua Li <shaohua.li@intel.com> | |
20 | * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | |
5b6985ce | 21 | * Author: Fenghua Yu <fenghua.yu@intel.com> |
ba395927 KA |
22 | */ |
23 | ||
24 | #include <linux/init.h> | |
25 | #include <linux/bitmap.h> | |
5e0d2a6f | 26 | #include <linux/debugfs.h> |
ba395927 KA |
27 | #include <linux/slab.h> |
28 | #include <linux/irq.h> | |
29 | #include <linux/interrupt.h> | |
ba395927 KA |
30 | #include <linux/spinlock.h> |
31 | #include <linux/pci.h> | |
32 | #include <linux/dmar.h> | |
33 | #include <linux/dma-mapping.h> | |
34 | #include <linux/mempool.h> | |
5e0d2a6f | 35 | #include <linux/timer.h> |
38717946 | 36 | #include <linux/iova.h> |
5d450806 | 37 | #include <linux/iommu.h> |
38717946 | 38 | #include <linux/intel-iommu.h> |
134fac3f | 39 | #include <linux/syscore_ops.h> |
69575d38 | 40 | #include <linux/tboot.h> |
adb2fe02 | 41 | #include <linux/dmi.h> |
5cdede24 | 42 | #include <linux/pci-ats.h> |
ba395927 | 43 | #include <asm/cacheflush.h> |
46a7fa27 | 44 | #include <asm/iommu.h> |
ba395927 KA |
45 | #include "pci.h" |
46 | ||
5b6985ce FY |
47 | #define ROOT_SIZE VTD_PAGE_SIZE |
48 | #define CONTEXT_SIZE VTD_PAGE_SIZE | |
49 | ||
ba395927 KA |
50 | #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) |
51 | #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) | |
e0fc7e0b | 52 | #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) |
ba395927 KA |
53 | |
54 | #define IOAPIC_RANGE_START (0xfee00000) | |
55 | #define IOAPIC_RANGE_END (0xfeefffff) | |
56 | #define IOVA_START_ADDR (0x1000) | |
57 | ||
58 | #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 | |
59 | ||
4ed0d3e6 FY |
60 | #define MAX_AGAW_WIDTH 64 |
61 | ||
2ebe3151 DW |
62 | #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) |
63 | #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) | |
64 | ||
65 | /* We limit DOMAIN_MAX_PFN to fit in an unsigned long, and DOMAIN_MAX_ADDR | |
66 | to match. That way, we can use 'unsigned long' for PFNs with impunity. */ | |
67 | #define DOMAIN_MAX_PFN(gaw) ((unsigned long) min_t(uint64_t, \ | |
68 | __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) | |
69 | #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) | |
ba395927 | 70 | |
f27be03b | 71 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
284901a9 | 72 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
6a35528a | 73 | #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) |
5e0d2a6f | 74 | |
df08cdc7 AM |
75 | /* page table handling */ |
76 | #define LEVEL_STRIDE (9) | |
77 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | |
78 | ||
79 | static inline int agaw_to_level(int agaw) | |
80 | { | |
81 | return agaw + 2; | |
82 | } | |
83 | ||
84 | static inline int agaw_to_width(int agaw) | |
85 | { | |
86 | return 30 + agaw * LEVEL_STRIDE; | |
87 | } | |
88 | ||
89 | static inline int width_to_agaw(int width) | |
90 | { | |
91 | return (width - 30) / LEVEL_STRIDE; | |
92 | } | |
93 | ||
94 | static inline unsigned int level_to_offset_bits(int level) | |
95 | { | |
96 | return (level - 1) * LEVEL_STRIDE; | |
97 | } | |
98 | ||
99 | static inline int pfn_level_offset(unsigned long pfn, int level) | |
100 | { | |
101 | return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; | |
102 | } | |
103 | ||
104 | static inline unsigned long level_mask(int level) | |
105 | { | |
106 | return -1UL << level_to_offset_bits(level); | |
107 | } | |
108 | ||
109 | static inline unsigned long level_size(int level) | |
110 | { | |
111 | return 1UL << level_to_offset_bits(level); | |
112 | } | |
113 | ||
114 | static inline unsigned long align_to_level(unsigned long pfn, int level) | |
115 | { | |
116 | return (pfn + level_size(level) - 1) & level_mask(level); | |
117 | } | |
fd18de50 | 118 | |
dd4e8319 DW |
119 | /* VT-d pages must always be _smaller_ than MM pages. Otherwise things |
120 | are never going to work. */ | |
121 | static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) | |
122 | { | |
123 | return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
124 | } | |
125 | ||
126 | static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn) | |
127 | { | |
128 | return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
129 | } | |
130 | static inline unsigned long page_to_dma_pfn(struct page *pg) | |
131 | { | |
132 | return mm_to_dma_pfn(page_to_pfn(pg)); | |
133 | } | |
134 | static inline unsigned long virt_to_dma_pfn(void *p) | |
135 | { | |
136 | return page_to_dma_pfn(virt_to_page(p)); | |
137 | } | |
138 | ||
d9630fe9 WH |
139 | /* global iommu list, set NULL for ignored DMAR units */ |
140 | static struct intel_iommu **g_iommus; | |
141 | ||
e0fc7e0b | 142 | static void __init check_tylersburg_isoch(void); |
9af88143 DW |
143 | static int rwbf_quirk; |
144 | ||
46b08e1a MM |
145 | /* |
146 | * 0: Present | |
147 | * 1-11: Reserved | |
148 | * 12-63: Context Ptr (12 - (haw-1)) | |
149 | * 64-127: Reserved | |
150 | */ | |
151 | struct root_entry { | |
152 | u64 val; | |
153 | u64 rsvd1; | |
154 | }; | |
155 | #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) | |
156 | static inline bool root_present(struct root_entry *root) | |
157 | { | |
158 | return (root->val & 1); | |
159 | } | |
160 | static inline void set_root_present(struct root_entry *root) | |
161 | { | |
162 | root->val |= 1; | |
163 | } | |
164 | static inline void set_root_value(struct root_entry *root, unsigned long value) | |
165 | { | |
166 | root->val |= value & VTD_PAGE_MASK; | |
167 | } | |
168 | ||
169 | static inline struct context_entry * | |
170 | get_context_addr_from_root(struct root_entry *root) | |
171 | { | |
172 | return (struct context_entry *) | |
173 | (root_present(root)?phys_to_virt( | |
174 | root->val & VTD_PAGE_MASK) : | |
175 | NULL); | |
176 | } | |
177 | ||
7a8fc25e MM |
178 | /* |
179 | * low 64 bits: | |
180 | * 0: present | |
181 | * 1: fault processing disable | |
182 | * 2-3: translation type | |
183 | * 12-63: address space root | |
184 | * high 64 bits: | |
185 | * 0-2: address width | |
186 | * 3-6: aval | |
187 | * 8-23: domain id | |
188 | */ | |
189 | struct context_entry { | |
190 | u64 lo; | |
191 | u64 hi; | |
192 | }; | |
c07e7d21 MM |
193 | |
194 | static inline bool context_present(struct context_entry *context) | |
195 | { | |
196 | return (context->lo & 1); | |
197 | } | |
198 | static inline void context_set_present(struct context_entry *context) | |
199 | { | |
200 | context->lo |= 1; | |
201 | } | |
202 | ||
203 | static inline void context_set_fault_enable(struct context_entry *context) | |
204 | { | |
205 | context->lo &= (((u64)-1) << 2) | 1; | |
206 | } | |
207 | ||
c07e7d21 MM |
208 | static inline void context_set_translation_type(struct context_entry *context, |
209 | unsigned long value) | |
210 | { | |
211 | context->lo &= (((u64)-1) << 4) | 3; | |
212 | context->lo |= (value & 3) << 2; | |
213 | } | |
214 | ||
215 | static inline void context_set_address_root(struct context_entry *context, | |
216 | unsigned long value) | |
217 | { | |
218 | context->lo |= value & VTD_PAGE_MASK; | |
219 | } | |
220 | ||
221 | static inline void context_set_address_width(struct context_entry *context, | |
222 | unsigned long value) | |
223 | { | |
224 | context->hi |= value & 7; | |
225 | } | |
226 | ||
227 | static inline void context_set_domain_id(struct context_entry *context, | |
228 | unsigned long value) | |
229 | { | |
230 | context->hi |= (value & ((1 << 16) - 1)) << 8; | |
231 | } | |
232 | ||
233 | static inline void context_clear_entry(struct context_entry *context) | |
234 | { | |
235 | context->lo = 0; | |
236 | context->hi = 0; | |
237 | } | |
7a8fc25e | 238 | |
622ba12a MM |
239 | /* |
240 | * 0: readable | |
241 | * 1: writable | |
242 | * 2-6: reserved | |
243 | * 7: super page | |
9cf06697 SY |
244 | * 8-10: available |
245 | * 11: snoop behavior | |
622ba12a MM |
246 | * 12-63: Host physcial address |
247 | */ | |
248 | struct dma_pte { | |
249 | u64 val; | |
250 | }; | |
622ba12a | 251 | |
19c239ce MM |
252 | static inline void dma_clear_pte(struct dma_pte *pte) |
253 | { | |
254 | pte->val = 0; | |
255 | } | |
256 | ||
257 | static inline void dma_set_pte_readable(struct dma_pte *pte) | |
258 | { | |
259 | pte->val |= DMA_PTE_READ; | |
260 | } | |
261 | ||
262 | static inline void dma_set_pte_writable(struct dma_pte *pte) | |
263 | { | |
264 | pte->val |= DMA_PTE_WRITE; | |
265 | } | |
266 | ||
9cf06697 SY |
267 | static inline void dma_set_pte_snp(struct dma_pte *pte) |
268 | { | |
269 | pte->val |= DMA_PTE_SNP; | |
270 | } | |
271 | ||
19c239ce MM |
272 | static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) |
273 | { | |
274 | pte->val = (pte->val & ~3) | (prot & 3); | |
275 | } | |
276 | ||
277 | static inline u64 dma_pte_addr(struct dma_pte *pte) | |
278 | { | |
c85994e4 DW |
279 | #ifdef CONFIG_64BIT |
280 | return pte->val & VTD_PAGE_MASK; | |
281 | #else | |
282 | /* Must have a full atomic 64-bit read */ | |
1a8bd481 | 283 | return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK; |
c85994e4 | 284 | #endif |
19c239ce MM |
285 | } |
286 | ||
dd4e8319 | 287 | static inline void dma_set_pte_pfn(struct dma_pte *pte, unsigned long pfn) |
19c239ce | 288 | { |
dd4e8319 | 289 | pte->val |= (uint64_t)pfn << VTD_PAGE_SHIFT; |
19c239ce MM |
290 | } |
291 | ||
292 | static inline bool dma_pte_present(struct dma_pte *pte) | |
293 | { | |
294 | return (pte->val & 3) != 0; | |
295 | } | |
622ba12a | 296 | |
75e6bf96 DW |
297 | static inline int first_pte_in_page(struct dma_pte *pte) |
298 | { | |
299 | return !((unsigned long)pte & ~VTD_PAGE_MASK); | |
300 | } | |
301 | ||
2c2e2c38 FY |
302 | /* |
303 | * This domain is a statically identity mapping domain. | |
304 | * 1. This domain creats a static 1:1 mapping to all usable memory. | |
305 | * 2. It maps to each iommu if successful. | |
306 | * 3. Each iommu mapps to this domain if successful. | |
307 | */ | |
19943b0e DW |
308 | static struct dmar_domain *si_domain; |
309 | static int hw_pass_through = 1; | |
2c2e2c38 | 310 | |
3b5410e7 | 311 | /* devices under the same p2p bridge are owned in one domain */ |
cdc7b837 | 312 | #define DOMAIN_FLAG_P2P_MULTIPLE_DEVICES (1 << 0) |
3b5410e7 | 313 | |
1ce28feb WH |
314 | /* domain represents a virtual machine, more than one devices |
315 | * across iommus may be owned in one domain, e.g. kvm guest. | |
316 | */ | |
317 | #define DOMAIN_FLAG_VIRTUAL_MACHINE (1 << 1) | |
318 | ||
2c2e2c38 FY |
319 | /* si_domain contains mulitple devices */ |
320 | #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2) | |
321 | ||
99126f7c MM |
322 | struct dmar_domain { |
323 | int id; /* domain id */ | |
4c923d47 | 324 | int nid; /* node id */ |
8c11e798 | 325 | unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/ |
99126f7c MM |
326 | |
327 | struct list_head devices; /* all devices' list */ | |
328 | struct iova_domain iovad; /* iova's that belong to this domain */ | |
329 | ||
330 | struct dma_pte *pgd; /* virtual address */ | |
99126f7c MM |
331 | int gaw; /* max guest address width */ |
332 | ||
333 | /* adjusted guest address width, 0 is level 2 30-bit */ | |
334 | int agaw; | |
335 | ||
3b5410e7 | 336 | int flags; /* flags to find out type of domain */ |
8e604097 WH |
337 | |
338 | int iommu_coherency;/* indicate coherency of iommu access */ | |
58c610bd | 339 | int iommu_snooping; /* indicate snooping control feature*/ |
c7151a8d WH |
340 | int iommu_count; /* reference count of iommu */ |
341 | spinlock_t iommu_lock; /* protect iommu set in domain */ | |
fe40f1e0 | 342 | u64 max_addr; /* maximum mapped address */ |
99126f7c MM |
343 | }; |
344 | ||
a647dacb MM |
345 | /* PCI domain-device relationship */ |
346 | struct device_domain_info { | |
347 | struct list_head link; /* link to domain siblings */ | |
348 | struct list_head global; /* link to global list */ | |
276dbf99 DW |
349 | int segment; /* PCI domain */ |
350 | u8 bus; /* PCI bus number */ | |
a647dacb | 351 | u8 devfn; /* PCI devfn number */ |
45e829ea | 352 | struct pci_dev *dev; /* it's NULL for PCIe-to-PCI bridge */ |
93a23a72 | 353 | struct intel_iommu *iommu; /* IOMMU used by this device */ |
a647dacb MM |
354 | struct dmar_domain *domain; /* pointer to domain */ |
355 | }; | |
356 | ||
5e0d2a6f | 357 | static void flush_unmaps_timeout(unsigned long data); |
358 | ||
359 | DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); | |
360 | ||
80b20dd8 | 361 | #define HIGH_WATER_MARK 250 |
362 | struct deferred_flush_tables { | |
363 | int next; | |
364 | struct iova *iova[HIGH_WATER_MARK]; | |
365 | struct dmar_domain *domain[HIGH_WATER_MARK]; | |
366 | }; | |
367 | ||
368 | static struct deferred_flush_tables *deferred_flush; | |
369 | ||
5e0d2a6f | 370 | /* bitmap for indexing intel_iommus */ |
5e0d2a6f | 371 | static int g_num_of_iommus; |
372 | ||
373 | static DEFINE_SPINLOCK(async_umap_flush_lock); | |
374 | static LIST_HEAD(unmaps_to_do); | |
375 | ||
376 | static int timer_on; | |
377 | static long list_size; | |
5e0d2a6f | 378 | |
ba395927 KA |
379 | static void domain_remove_dev_info(struct dmar_domain *domain); |
380 | ||
0cd5c3c8 KM |
381 | #ifdef CONFIG_DMAR_DEFAULT_ON |
382 | int dmar_disabled = 0; | |
383 | #else | |
384 | int dmar_disabled = 1; | |
385 | #endif /*CONFIG_DMAR_DEFAULT_ON*/ | |
386 | ||
2d9e667e | 387 | static int dmar_map_gfx = 1; |
7d3b03ce | 388 | static int dmar_forcedac; |
5e0d2a6f | 389 | static int intel_iommu_strict; |
ba395927 KA |
390 | |
391 | #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1)) | |
392 | static DEFINE_SPINLOCK(device_domain_lock); | |
393 | static LIST_HEAD(device_domain_list); | |
394 | ||
a8bcbb0d JR |
395 | static struct iommu_ops intel_iommu_ops; |
396 | ||
ba395927 KA |
397 | static int __init intel_iommu_setup(char *str) |
398 | { | |
399 | if (!str) | |
400 | return -EINVAL; | |
401 | while (*str) { | |
0cd5c3c8 KM |
402 | if (!strncmp(str, "on", 2)) { |
403 | dmar_disabled = 0; | |
404 | printk(KERN_INFO "Intel-IOMMU: enabled\n"); | |
405 | } else if (!strncmp(str, "off", 3)) { | |
ba395927 | 406 | dmar_disabled = 1; |
0cd5c3c8 | 407 | printk(KERN_INFO "Intel-IOMMU: disabled\n"); |
ba395927 KA |
408 | } else if (!strncmp(str, "igfx_off", 8)) { |
409 | dmar_map_gfx = 0; | |
410 | printk(KERN_INFO | |
411 | "Intel-IOMMU: disable GFX device mapping\n"); | |
7d3b03ce | 412 | } else if (!strncmp(str, "forcedac", 8)) { |
5e0d2a6f | 413 | printk(KERN_INFO |
7d3b03ce KA |
414 | "Intel-IOMMU: Forcing DAC for PCI devices\n"); |
415 | dmar_forcedac = 1; | |
5e0d2a6f | 416 | } else if (!strncmp(str, "strict", 6)) { |
417 | printk(KERN_INFO | |
418 | "Intel-IOMMU: disable batched IOTLB flush\n"); | |
419 | intel_iommu_strict = 1; | |
ba395927 KA |
420 | } |
421 | ||
422 | str += strcspn(str, ","); | |
423 | while (*str == ',') | |
424 | str++; | |
425 | } | |
426 | return 0; | |
427 | } | |
428 | __setup("intel_iommu=", intel_iommu_setup); | |
429 | ||
430 | static struct kmem_cache *iommu_domain_cache; | |
431 | static struct kmem_cache *iommu_devinfo_cache; | |
432 | static struct kmem_cache *iommu_iova_cache; | |
433 | ||
4c923d47 | 434 | static inline void *alloc_pgtable_page(int node) |
eb3fa7cb | 435 | { |
4c923d47 SS |
436 | struct page *page; |
437 | void *vaddr = NULL; | |
eb3fa7cb | 438 | |
4c923d47 SS |
439 | page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0); |
440 | if (page) | |
441 | vaddr = page_address(page); | |
eb3fa7cb | 442 | return vaddr; |
ba395927 KA |
443 | } |
444 | ||
445 | static inline void free_pgtable_page(void *vaddr) | |
446 | { | |
447 | free_page((unsigned long)vaddr); | |
448 | } | |
449 | ||
450 | static inline void *alloc_domain_mem(void) | |
451 | { | |
354bb65e | 452 | return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC); |
ba395927 KA |
453 | } |
454 | ||
38717946 | 455 | static void free_domain_mem(void *vaddr) |
ba395927 KA |
456 | { |
457 | kmem_cache_free(iommu_domain_cache, vaddr); | |
458 | } | |
459 | ||
460 | static inline void * alloc_devinfo_mem(void) | |
461 | { | |
354bb65e | 462 | return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC); |
ba395927 KA |
463 | } |
464 | ||
465 | static inline void free_devinfo_mem(void *vaddr) | |
466 | { | |
467 | kmem_cache_free(iommu_devinfo_cache, vaddr); | |
468 | } | |
469 | ||
470 | struct iova *alloc_iova_mem(void) | |
471 | { | |
354bb65e | 472 | return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC); |
ba395927 KA |
473 | } |
474 | ||
475 | void free_iova_mem(struct iova *iova) | |
476 | { | |
477 | kmem_cache_free(iommu_iova_cache, iova); | |
478 | } | |
479 | ||
1b573683 | 480 | |
4ed0d3e6 | 481 | static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) |
1b573683 WH |
482 | { |
483 | unsigned long sagaw; | |
484 | int agaw = -1; | |
485 | ||
486 | sagaw = cap_sagaw(iommu->cap); | |
4ed0d3e6 | 487 | for (agaw = width_to_agaw(max_gaw); |
1b573683 WH |
488 | agaw >= 0; agaw--) { |
489 | if (test_bit(agaw, &sagaw)) | |
490 | break; | |
491 | } | |
492 | ||
493 | return agaw; | |
494 | } | |
495 | ||
4ed0d3e6 FY |
496 | /* |
497 | * Calculate max SAGAW for each iommu. | |
498 | */ | |
499 | int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
500 | { | |
501 | return __iommu_calculate_agaw(iommu, MAX_AGAW_WIDTH); | |
502 | } | |
503 | ||
504 | /* | |
505 | * calculate agaw for each iommu. | |
506 | * "SAGAW" may be different across iommus, use a default agaw, and | |
507 | * get a supported less agaw for iommus that don't support the default agaw. | |
508 | */ | |
509 | int iommu_calculate_agaw(struct intel_iommu *iommu) | |
510 | { | |
511 | return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
512 | } | |
513 | ||
2c2e2c38 | 514 | /* This functionin only returns single iommu in a domain */ |
8c11e798 WH |
515 | static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) |
516 | { | |
517 | int iommu_id; | |
518 | ||
2c2e2c38 | 519 | /* si_domain and vm domain should not get here. */ |
1ce28feb | 520 | BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE); |
2c2e2c38 | 521 | BUG_ON(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY); |
1ce28feb | 522 | |
8c11e798 WH |
523 | iommu_id = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); |
524 | if (iommu_id < 0 || iommu_id >= g_num_of_iommus) | |
525 | return NULL; | |
526 | ||
527 | return g_iommus[iommu_id]; | |
528 | } | |
529 | ||
8e604097 WH |
530 | static void domain_update_iommu_coherency(struct dmar_domain *domain) |
531 | { | |
532 | int i; | |
533 | ||
534 | domain->iommu_coherency = 1; | |
535 | ||
a45946ab | 536 | for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { |
8e604097 WH |
537 | if (!ecap_coherent(g_iommus[i]->ecap)) { |
538 | domain->iommu_coherency = 0; | |
539 | break; | |
540 | } | |
8e604097 WH |
541 | } |
542 | } | |
543 | ||
58c610bd SY |
544 | static void domain_update_iommu_snooping(struct dmar_domain *domain) |
545 | { | |
546 | int i; | |
547 | ||
548 | domain->iommu_snooping = 1; | |
549 | ||
a45946ab | 550 | for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { |
58c610bd SY |
551 | if (!ecap_sc_support(g_iommus[i]->ecap)) { |
552 | domain->iommu_snooping = 0; | |
553 | break; | |
554 | } | |
58c610bd SY |
555 | } |
556 | } | |
557 | ||
558 | /* Some capabilities may be different across iommus */ | |
559 | static void domain_update_iommu_cap(struct dmar_domain *domain) | |
560 | { | |
561 | domain_update_iommu_coherency(domain); | |
562 | domain_update_iommu_snooping(domain); | |
563 | } | |
564 | ||
276dbf99 | 565 | static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) |
c7151a8d WH |
566 | { |
567 | struct dmar_drhd_unit *drhd = NULL; | |
568 | int i; | |
569 | ||
570 | for_each_drhd_unit(drhd) { | |
571 | if (drhd->ignored) | |
572 | continue; | |
276dbf99 DW |
573 | if (segment != drhd->segment) |
574 | continue; | |
c7151a8d | 575 | |
924b6231 | 576 | for (i = 0; i < drhd->devices_cnt; i++) { |
288e4877 DH |
577 | if (drhd->devices[i] && |
578 | drhd->devices[i]->bus->number == bus && | |
c7151a8d WH |
579 | drhd->devices[i]->devfn == devfn) |
580 | return drhd->iommu; | |
4958c5dc DW |
581 | if (drhd->devices[i] && |
582 | drhd->devices[i]->subordinate && | |
924b6231 DW |
583 | drhd->devices[i]->subordinate->number <= bus && |
584 | drhd->devices[i]->subordinate->subordinate >= bus) | |
585 | return drhd->iommu; | |
586 | } | |
c7151a8d WH |
587 | |
588 | if (drhd->include_all) | |
589 | return drhd->iommu; | |
590 | } | |
591 | ||
592 | return NULL; | |
593 | } | |
594 | ||
5331fe6f WH |
595 | static void domain_flush_cache(struct dmar_domain *domain, |
596 | void *addr, int size) | |
597 | { | |
598 | if (!domain->iommu_coherency) | |
599 | clflush_cache_range(addr, size); | |
600 | } | |
601 | ||
ba395927 KA |
602 | /* Gets context entry for a given bus and devfn */ |
603 | static struct context_entry * device_to_context_entry(struct intel_iommu *iommu, | |
604 | u8 bus, u8 devfn) | |
605 | { | |
606 | struct root_entry *root; | |
607 | struct context_entry *context; | |
608 | unsigned long phy_addr; | |
609 | unsigned long flags; | |
610 | ||
611 | spin_lock_irqsave(&iommu->lock, flags); | |
612 | root = &iommu->root_entry[bus]; | |
613 | context = get_context_addr_from_root(root); | |
614 | if (!context) { | |
4c923d47 SS |
615 | context = (struct context_entry *) |
616 | alloc_pgtable_page(iommu->node); | |
ba395927 KA |
617 | if (!context) { |
618 | spin_unlock_irqrestore(&iommu->lock, flags); | |
619 | return NULL; | |
620 | } | |
5b6985ce | 621 | __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE); |
ba395927 KA |
622 | phy_addr = virt_to_phys((void *)context); |
623 | set_root_value(root, phy_addr); | |
624 | set_root_present(root); | |
625 | __iommu_flush_cache(iommu, root, sizeof(*root)); | |
626 | } | |
627 | spin_unlock_irqrestore(&iommu->lock, flags); | |
628 | return &context[devfn]; | |
629 | } | |
630 | ||
631 | static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
632 | { | |
633 | struct root_entry *root; | |
634 | struct context_entry *context; | |
635 | int ret; | |
636 | unsigned long flags; | |
637 | ||
638 | spin_lock_irqsave(&iommu->lock, flags); | |
639 | root = &iommu->root_entry[bus]; | |
640 | context = get_context_addr_from_root(root); | |
641 | if (!context) { | |
642 | ret = 0; | |
643 | goto out; | |
644 | } | |
c07e7d21 | 645 | ret = context_present(&context[devfn]); |
ba395927 KA |
646 | out: |
647 | spin_unlock_irqrestore(&iommu->lock, flags); | |
648 | return ret; | |
649 | } | |
650 | ||
651 | static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
652 | { | |
653 | struct root_entry *root; | |
654 | struct context_entry *context; | |
655 | unsigned long flags; | |
656 | ||
657 | spin_lock_irqsave(&iommu->lock, flags); | |
658 | root = &iommu->root_entry[bus]; | |
659 | context = get_context_addr_from_root(root); | |
660 | if (context) { | |
c07e7d21 | 661 | context_clear_entry(&context[devfn]); |
ba395927 KA |
662 | __iommu_flush_cache(iommu, &context[devfn], \ |
663 | sizeof(*context)); | |
664 | } | |
665 | spin_unlock_irqrestore(&iommu->lock, flags); | |
666 | } | |
667 | ||
668 | static void free_context_table(struct intel_iommu *iommu) | |
669 | { | |
670 | struct root_entry *root; | |
671 | int i; | |
672 | unsigned long flags; | |
673 | struct context_entry *context; | |
674 | ||
675 | spin_lock_irqsave(&iommu->lock, flags); | |
676 | if (!iommu->root_entry) { | |
677 | goto out; | |
678 | } | |
679 | for (i = 0; i < ROOT_ENTRY_NR; i++) { | |
680 | root = &iommu->root_entry[i]; | |
681 | context = get_context_addr_from_root(root); | |
682 | if (context) | |
683 | free_pgtable_page(context); | |
684 | } | |
685 | free_pgtable_page(iommu->root_entry); | |
686 | iommu->root_entry = NULL; | |
687 | out: | |
688 | spin_unlock_irqrestore(&iommu->lock, flags); | |
689 | } | |
690 | ||
b026fd28 DW |
691 | static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, |
692 | unsigned long pfn) | |
ba395927 | 693 | { |
b026fd28 | 694 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
ba395927 KA |
695 | struct dma_pte *parent, *pte = NULL; |
696 | int level = agaw_to_level(domain->agaw); | |
697 | int offset; | |
ba395927 KA |
698 | |
699 | BUG_ON(!domain->pgd); | |
b026fd28 | 700 | BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width); |
ba395927 KA |
701 | parent = domain->pgd; |
702 | ||
ba395927 KA |
703 | while (level > 0) { |
704 | void *tmp_page; | |
705 | ||
b026fd28 | 706 | offset = pfn_level_offset(pfn, level); |
ba395927 KA |
707 | pte = &parent[offset]; |
708 | if (level == 1) | |
709 | break; | |
710 | ||
19c239ce | 711 | if (!dma_pte_present(pte)) { |
c85994e4 DW |
712 | uint64_t pteval; |
713 | ||
4c923d47 | 714 | tmp_page = alloc_pgtable_page(domain->nid); |
ba395927 | 715 | |
206a73c1 | 716 | if (!tmp_page) |
ba395927 | 717 | return NULL; |
206a73c1 | 718 | |
c85994e4 | 719 | domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE); |
64de5af0 | 720 | pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE; |
c85994e4 DW |
721 | if (cmpxchg64(&pte->val, 0ULL, pteval)) { |
722 | /* Someone else set it while we were thinking; use theirs. */ | |
723 | free_pgtable_page(tmp_page); | |
724 | } else { | |
725 | dma_pte_addr(pte); | |
726 | domain_flush_cache(domain, pte, sizeof(*pte)); | |
727 | } | |
ba395927 | 728 | } |
19c239ce | 729 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
730 | level--; |
731 | } | |
732 | ||
ba395927 KA |
733 | return pte; |
734 | } | |
735 | ||
736 | /* return address's pte at specific level */ | |
90dcfb5e DW |
737 | static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, |
738 | unsigned long pfn, | |
739 | int level) | |
ba395927 KA |
740 | { |
741 | struct dma_pte *parent, *pte = NULL; | |
742 | int total = agaw_to_level(domain->agaw); | |
743 | int offset; | |
744 | ||
745 | parent = domain->pgd; | |
746 | while (level <= total) { | |
90dcfb5e | 747 | offset = pfn_level_offset(pfn, total); |
ba395927 KA |
748 | pte = &parent[offset]; |
749 | if (level == total) | |
750 | return pte; | |
751 | ||
19c239ce | 752 | if (!dma_pte_present(pte)) |
ba395927 | 753 | break; |
19c239ce | 754 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
755 | total--; |
756 | } | |
757 | return NULL; | |
758 | } | |
759 | ||
ba395927 | 760 | /* clear last level pte, a tlb flush should be followed */ |
595badf5 DW |
761 | static void dma_pte_clear_range(struct dmar_domain *domain, |
762 | unsigned long start_pfn, | |
763 | unsigned long last_pfn) | |
ba395927 | 764 | { |
04b18e65 | 765 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
310a5ab9 | 766 | struct dma_pte *first_pte, *pte; |
66eae846 | 767 | |
04b18e65 | 768 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
595badf5 | 769 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); |
59c36286 | 770 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 771 | |
04b18e65 | 772 | /* we don't need lock here; nobody else touches the iova range */ |
59c36286 | 773 | do { |
310a5ab9 DW |
774 | first_pte = pte = dma_pfn_level_pte(domain, start_pfn, 1); |
775 | if (!pte) { | |
776 | start_pfn = align_to_level(start_pfn + 1, 2); | |
777 | continue; | |
778 | } | |
75e6bf96 | 779 | do { |
310a5ab9 DW |
780 | dma_clear_pte(pte); |
781 | start_pfn++; | |
782 | pte++; | |
75e6bf96 DW |
783 | } while (start_pfn <= last_pfn && !first_pte_in_page(pte)); |
784 | ||
310a5ab9 DW |
785 | domain_flush_cache(domain, first_pte, |
786 | (void *)pte - (void *)first_pte); | |
59c36286 DW |
787 | |
788 | } while (start_pfn && start_pfn <= last_pfn); | |
ba395927 KA |
789 | } |
790 | ||
791 | /* free page table pages. last level pte should already be cleared */ | |
792 | static void dma_pte_free_pagetable(struct dmar_domain *domain, | |
d794dc9b DW |
793 | unsigned long start_pfn, |
794 | unsigned long last_pfn) | |
ba395927 | 795 | { |
6660c63a | 796 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
f3a0a52f | 797 | struct dma_pte *first_pte, *pte; |
ba395927 KA |
798 | int total = agaw_to_level(domain->agaw); |
799 | int level; | |
6660c63a | 800 | unsigned long tmp; |
ba395927 | 801 | |
6660c63a DW |
802 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
803 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); | |
59c36286 | 804 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 805 | |
f3a0a52f | 806 | /* We don't need lock here; nobody else touches the iova range */ |
ba395927 KA |
807 | level = 2; |
808 | while (level <= total) { | |
6660c63a DW |
809 | tmp = align_to_level(start_pfn, level); |
810 | ||
f3a0a52f | 811 | /* If we can't even clear one PTE at this level, we're done */ |
6660c63a | 812 | if (tmp + level_size(level) - 1 > last_pfn) |
ba395927 KA |
813 | return; |
814 | ||
59c36286 | 815 | do { |
f3a0a52f DW |
816 | first_pte = pte = dma_pfn_level_pte(domain, tmp, level); |
817 | if (!pte) { | |
818 | tmp = align_to_level(tmp + 1, level + 1); | |
819 | continue; | |
820 | } | |
75e6bf96 | 821 | do { |
6a43e574 DW |
822 | if (dma_pte_present(pte)) { |
823 | free_pgtable_page(phys_to_virt(dma_pte_addr(pte))); | |
824 | dma_clear_pte(pte); | |
825 | } | |
f3a0a52f DW |
826 | pte++; |
827 | tmp += level_size(level); | |
75e6bf96 DW |
828 | } while (!first_pte_in_page(pte) && |
829 | tmp + level_size(level) - 1 <= last_pfn); | |
830 | ||
f3a0a52f DW |
831 | domain_flush_cache(domain, first_pte, |
832 | (void *)pte - (void *)first_pte); | |
833 | ||
59c36286 | 834 | } while (tmp && tmp + level_size(level) - 1 <= last_pfn); |
ba395927 KA |
835 | level++; |
836 | } | |
837 | /* free pgd */ | |
d794dc9b | 838 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { |
ba395927 KA |
839 | free_pgtable_page(domain->pgd); |
840 | domain->pgd = NULL; | |
841 | } | |
842 | } | |
843 | ||
844 | /* iommu handling */ | |
845 | static int iommu_alloc_root_entry(struct intel_iommu *iommu) | |
846 | { | |
847 | struct root_entry *root; | |
848 | unsigned long flags; | |
849 | ||
4c923d47 | 850 | root = (struct root_entry *)alloc_pgtable_page(iommu->node); |
ba395927 KA |
851 | if (!root) |
852 | return -ENOMEM; | |
853 | ||
5b6985ce | 854 | __iommu_flush_cache(iommu, root, ROOT_SIZE); |
ba395927 KA |
855 | |
856 | spin_lock_irqsave(&iommu->lock, flags); | |
857 | iommu->root_entry = root; | |
858 | spin_unlock_irqrestore(&iommu->lock, flags); | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
ba395927 KA |
863 | static void iommu_set_root_entry(struct intel_iommu *iommu) |
864 | { | |
865 | void *addr; | |
c416daa9 | 866 | u32 sts; |
ba395927 KA |
867 | unsigned long flag; |
868 | ||
869 | addr = iommu->root_entry; | |
870 | ||
871 | spin_lock_irqsave(&iommu->register_lock, flag); | |
872 | dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr)); | |
873 | ||
c416daa9 | 874 | writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
875 | |
876 | /* Make sure hardware complete it */ | |
877 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 878 | readl, (sts & DMA_GSTS_RTPS), sts); |
ba395927 KA |
879 | |
880 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
881 | } | |
882 | ||
883 | static void iommu_flush_write_buffer(struct intel_iommu *iommu) | |
884 | { | |
885 | u32 val; | |
886 | unsigned long flag; | |
887 | ||
9af88143 | 888 | if (!rwbf_quirk && !cap_rwbf(iommu->cap)) |
ba395927 | 889 | return; |
ba395927 KA |
890 | |
891 | spin_lock_irqsave(&iommu->register_lock, flag); | |
462b60f6 | 892 | writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
893 | |
894 | /* Make sure hardware complete it */ | |
895 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 896 | readl, (!(val & DMA_GSTS_WBFS)), val); |
ba395927 KA |
897 | |
898 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
899 | } | |
900 | ||
901 | /* return value determine if we need a write buffer flush */ | |
4c25a2c1 DW |
902 | static void __iommu_flush_context(struct intel_iommu *iommu, |
903 | u16 did, u16 source_id, u8 function_mask, | |
904 | u64 type) | |
ba395927 KA |
905 | { |
906 | u64 val = 0; | |
907 | unsigned long flag; | |
908 | ||
ba395927 KA |
909 | switch (type) { |
910 | case DMA_CCMD_GLOBAL_INVL: | |
911 | val = DMA_CCMD_GLOBAL_INVL; | |
912 | break; | |
913 | case DMA_CCMD_DOMAIN_INVL: | |
914 | val = DMA_CCMD_DOMAIN_INVL|DMA_CCMD_DID(did); | |
915 | break; | |
916 | case DMA_CCMD_DEVICE_INVL: | |
917 | val = DMA_CCMD_DEVICE_INVL|DMA_CCMD_DID(did) | |
918 | | DMA_CCMD_SID(source_id) | DMA_CCMD_FM(function_mask); | |
919 | break; | |
920 | default: | |
921 | BUG(); | |
922 | } | |
923 | val |= DMA_CCMD_ICC; | |
924 | ||
925 | spin_lock_irqsave(&iommu->register_lock, flag); | |
926 | dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); | |
927 | ||
928 | /* Make sure hardware complete it */ | |
929 | IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, | |
930 | dmar_readq, (!(val & DMA_CCMD_ICC)), val); | |
931 | ||
932 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
ba395927 KA |
933 | } |
934 | ||
ba395927 | 935 | /* return value determine if we need a write buffer flush */ |
1f0ef2aa DW |
936 | static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, |
937 | u64 addr, unsigned int size_order, u64 type) | |
ba395927 KA |
938 | { |
939 | int tlb_offset = ecap_iotlb_offset(iommu->ecap); | |
940 | u64 val = 0, val_iva = 0; | |
941 | unsigned long flag; | |
942 | ||
ba395927 KA |
943 | switch (type) { |
944 | case DMA_TLB_GLOBAL_FLUSH: | |
945 | /* global flush doesn't need set IVA_REG */ | |
946 | val = DMA_TLB_GLOBAL_FLUSH|DMA_TLB_IVT; | |
947 | break; | |
948 | case DMA_TLB_DSI_FLUSH: | |
949 | val = DMA_TLB_DSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
950 | break; | |
951 | case DMA_TLB_PSI_FLUSH: | |
952 | val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
953 | /* Note: always flush non-leaf currently */ | |
954 | val_iva = size_order | addr; | |
955 | break; | |
956 | default: | |
957 | BUG(); | |
958 | } | |
959 | /* Note: set drain read/write */ | |
960 | #if 0 | |
961 | /* | |
962 | * This is probably to be super secure.. Looks like we can | |
963 | * ignore it without any impact. | |
964 | */ | |
965 | if (cap_read_drain(iommu->cap)) | |
966 | val |= DMA_TLB_READ_DRAIN; | |
967 | #endif | |
968 | if (cap_write_drain(iommu->cap)) | |
969 | val |= DMA_TLB_WRITE_DRAIN; | |
970 | ||
971 | spin_lock_irqsave(&iommu->register_lock, flag); | |
972 | /* Note: Only uses first TLB reg currently */ | |
973 | if (val_iva) | |
974 | dmar_writeq(iommu->reg + tlb_offset, val_iva); | |
975 | dmar_writeq(iommu->reg + tlb_offset + 8, val); | |
976 | ||
977 | /* Make sure hardware complete it */ | |
978 | IOMMU_WAIT_OP(iommu, tlb_offset + 8, | |
979 | dmar_readq, (!(val & DMA_TLB_IVT)), val); | |
980 | ||
981 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
982 | ||
983 | /* check IOTLB invalidation granularity */ | |
984 | if (DMA_TLB_IAIG(val) == 0) | |
985 | printk(KERN_ERR"IOMMU: flush IOTLB failed\n"); | |
986 | if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type)) | |
987 | pr_debug("IOMMU: tlb flush request %Lx, actual %Lx\n", | |
5b6985ce FY |
988 | (unsigned long long)DMA_TLB_IIRG(type), |
989 | (unsigned long long)DMA_TLB_IAIG(val)); | |
ba395927 KA |
990 | } |
991 | ||
93a23a72 YZ |
992 | static struct device_domain_info *iommu_support_dev_iotlb( |
993 | struct dmar_domain *domain, int segment, u8 bus, u8 devfn) | |
994 | { | |
995 | int found = 0; | |
996 | unsigned long flags; | |
997 | struct device_domain_info *info; | |
998 | struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); | |
999 | ||
1000 | if (!ecap_dev_iotlb_support(iommu->ecap)) | |
1001 | return NULL; | |
1002 | ||
1003 | if (!iommu->qi) | |
1004 | return NULL; | |
1005 | ||
1006 | spin_lock_irqsave(&device_domain_lock, flags); | |
1007 | list_for_each_entry(info, &domain->devices, link) | |
1008 | if (info->bus == bus && info->devfn == devfn) { | |
1009 | found = 1; | |
1010 | break; | |
1011 | } | |
1012 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1013 | ||
1014 | if (!found || !info->dev) | |
1015 | return NULL; | |
1016 | ||
1017 | if (!pci_find_ext_capability(info->dev, PCI_EXT_CAP_ID_ATS)) | |
1018 | return NULL; | |
1019 | ||
1020 | if (!dmar_find_matched_atsr_unit(info->dev)) | |
1021 | return NULL; | |
1022 | ||
1023 | info->iommu = iommu; | |
1024 | ||
1025 | return info; | |
1026 | } | |
1027 | ||
1028 | static void iommu_enable_dev_iotlb(struct device_domain_info *info) | |
ba395927 | 1029 | { |
93a23a72 YZ |
1030 | if (!info) |
1031 | return; | |
1032 | ||
1033 | pci_enable_ats(info->dev, VTD_PAGE_SHIFT); | |
1034 | } | |
1035 | ||
1036 | static void iommu_disable_dev_iotlb(struct device_domain_info *info) | |
1037 | { | |
1038 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1039 | return; | |
1040 | ||
1041 | pci_disable_ats(info->dev); | |
1042 | } | |
1043 | ||
1044 | static void iommu_flush_dev_iotlb(struct dmar_domain *domain, | |
1045 | u64 addr, unsigned mask) | |
1046 | { | |
1047 | u16 sid, qdep; | |
1048 | unsigned long flags; | |
1049 | struct device_domain_info *info; | |
1050 | ||
1051 | spin_lock_irqsave(&device_domain_lock, flags); | |
1052 | list_for_each_entry(info, &domain->devices, link) { | |
1053 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1054 | continue; | |
1055 | ||
1056 | sid = info->bus << 8 | info->devfn; | |
1057 | qdep = pci_ats_queue_depth(info->dev); | |
1058 | qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); | |
1059 | } | |
1060 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1061 | } | |
1062 | ||
1f0ef2aa | 1063 | static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, |
82653633 | 1064 | unsigned long pfn, unsigned int pages, int map) |
ba395927 | 1065 | { |
9dd2fe89 | 1066 | unsigned int mask = ilog2(__roundup_pow_of_two(pages)); |
03d6a246 | 1067 | uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; |
ba395927 | 1068 | |
ba395927 KA |
1069 | BUG_ON(pages == 0); |
1070 | ||
ba395927 | 1071 | /* |
9dd2fe89 YZ |
1072 | * Fallback to domain selective flush if no PSI support or the size is |
1073 | * too big. | |
ba395927 KA |
1074 | * PSI requires page size to be 2 ^ x, and the base address is naturally |
1075 | * aligned to the size | |
1076 | */ | |
9dd2fe89 YZ |
1077 | if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap)) |
1078 | iommu->flush.flush_iotlb(iommu, did, 0, 0, | |
1f0ef2aa | 1079 | DMA_TLB_DSI_FLUSH); |
9dd2fe89 YZ |
1080 | else |
1081 | iommu->flush.flush_iotlb(iommu, did, addr, mask, | |
1082 | DMA_TLB_PSI_FLUSH); | |
bf92df30 YZ |
1083 | |
1084 | /* | |
82653633 NA |
1085 | * In caching mode, changes of pages from non-present to present require |
1086 | * flush. However, device IOTLB doesn't need to be flushed in this case. | |
bf92df30 | 1087 | */ |
82653633 | 1088 | if (!cap_caching_mode(iommu->cap) || !map) |
93a23a72 | 1089 | iommu_flush_dev_iotlb(iommu->domains[did], addr, mask); |
ba395927 KA |
1090 | } |
1091 | ||
f8bab735 | 1092 | static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) |
1093 | { | |
1094 | u32 pmen; | |
1095 | unsigned long flags; | |
1096 | ||
1097 | spin_lock_irqsave(&iommu->register_lock, flags); | |
1098 | pmen = readl(iommu->reg + DMAR_PMEN_REG); | |
1099 | pmen &= ~DMA_PMEN_EPM; | |
1100 | writel(pmen, iommu->reg + DMAR_PMEN_REG); | |
1101 | ||
1102 | /* wait for the protected region status bit to clear */ | |
1103 | IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, | |
1104 | readl, !(pmen & DMA_PMEN_PRS), pmen); | |
1105 | ||
1106 | spin_unlock_irqrestore(&iommu->register_lock, flags); | |
1107 | } | |
1108 | ||
ba395927 KA |
1109 | static int iommu_enable_translation(struct intel_iommu *iommu) |
1110 | { | |
1111 | u32 sts; | |
1112 | unsigned long flags; | |
1113 | ||
1114 | spin_lock_irqsave(&iommu->register_lock, flags); | |
c416daa9 DW |
1115 | iommu->gcmd |= DMA_GCMD_TE; |
1116 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
ba395927 KA |
1117 | |
1118 | /* Make sure hardware complete it */ | |
1119 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1120 | readl, (sts & DMA_GSTS_TES), sts); |
ba395927 | 1121 | |
ba395927 KA |
1122 | spin_unlock_irqrestore(&iommu->register_lock, flags); |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static int iommu_disable_translation(struct intel_iommu *iommu) | |
1127 | { | |
1128 | u32 sts; | |
1129 | unsigned long flag; | |
1130 | ||
1131 | spin_lock_irqsave(&iommu->register_lock, flag); | |
1132 | iommu->gcmd &= ~DMA_GCMD_TE; | |
1133 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
1134 | ||
1135 | /* Make sure hardware complete it */ | |
1136 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1137 | readl, (!(sts & DMA_GSTS_TES)), sts); |
ba395927 KA |
1138 | |
1139 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
3460a6d9 | 1143 | |
ba395927 KA |
1144 | static int iommu_init_domains(struct intel_iommu *iommu) |
1145 | { | |
1146 | unsigned long ndomains; | |
1147 | unsigned long nlongs; | |
1148 | ||
1149 | ndomains = cap_ndoms(iommu->cap); | |
680a7524 YL |
1150 | pr_debug("IOMMU %d: Number of Domains supportd <%ld>\n", iommu->seq_id, |
1151 | ndomains); | |
ba395927 KA |
1152 | nlongs = BITS_TO_LONGS(ndomains); |
1153 | ||
94a91b50 DD |
1154 | spin_lock_init(&iommu->lock); |
1155 | ||
ba395927 KA |
1156 | /* TBD: there might be 64K domains, |
1157 | * consider other allocation for future chip | |
1158 | */ | |
1159 | iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); | |
1160 | if (!iommu->domain_ids) { | |
1161 | printk(KERN_ERR "Allocating domain id array failed\n"); | |
1162 | return -ENOMEM; | |
1163 | } | |
1164 | iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *), | |
1165 | GFP_KERNEL); | |
1166 | if (!iommu->domains) { | |
1167 | printk(KERN_ERR "Allocating domain array failed\n"); | |
ba395927 KA |
1168 | return -ENOMEM; |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * if Caching mode is set, then invalid translations are tagged | |
1173 | * with domainid 0. Hence we need to pre-allocate it. | |
1174 | */ | |
1175 | if (cap_caching_mode(iommu->cap)) | |
1176 | set_bit(0, iommu->domain_ids); | |
1177 | return 0; | |
1178 | } | |
ba395927 | 1179 | |
ba395927 KA |
1180 | |
1181 | static void domain_exit(struct dmar_domain *domain); | |
5e98c4b1 | 1182 | static void vm_domain_exit(struct dmar_domain *domain); |
e61d98d8 SS |
1183 | |
1184 | void free_dmar_iommu(struct intel_iommu *iommu) | |
ba395927 KA |
1185 | { |
1186 | struct dmar_domain *domain; | |
1187 | int i; | |
c7151a8d | 1188 | unsigned long flags; |
ba395927 | 1189 | |
94a91b50 | 1190 | if ((iommu->domains) && (iommu->domain_ids)) { |
a45946ab | 1191 | for_each_set_bit(i, iommu->domain_ids, cap_ndoms(iommu->cap)) { |
94a91b50 DD |
1192 | domain = iommu->domains[i]; |
1193 | clear_bit(i, iommu->domain_ids); | |
1194 | ||
1195 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1196 | if (--domain->iommu_count == 0) { | |
1197 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) | |
1198 | vm_domain_exit(domain); | |
1199 | else | |
1200 | domain_exit(domain); | |
1201 | } | |
1202 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
5e98c4b1 | 1203 | } |
ba395927 KA |
1204 | } |
1205 | ||
1206 | if (iommu->gcmd & DMA_GCMD_TE) | |
1207 | iommu_disable_translation(iommu); | |
1208 | ||
1209 | if (iommu->irq) { | |
dced35ae | 1210 | irq_set_handler_data(iommu->irq, NULL); |
ba395927 KA |
1211 | /* This will mask the irq */ |
1212 | free_irq(iommu->irq, iommu); | |
1213 | destroy_irq(iommu->irq); | |
1214 | } | |
1215 | ||
1216 | kfree(iommu->domains); | |
1217 | kfree(iommu->domain_ids); | |
1218 | ||
d9630fe9 WH |
1219 | g_iommus[iommu->seq_id] = NULL; |
1220 | ||
1221 | /* if all iommus are freed, free g_iommus */ | |
1222 | for (i = 0; i < g_num_of_iommus; i++) { | |
1223 | if (g_iommus[i]) | |
1224 | break; | |
1225 | } | |
1226 | ||
1227 | if (i == g_num_of_iommus) | |
1228 | kfree(g_iommus); | |
1229 | ||
ba395927 KA |
1230 | /* free context mapping */ |
1231 | free_context_table(iommu); | |
ba395927 KA |
1232 | } |
1233 | ||
2c2e2c38 | 1234 | static struct dmar_domain *alloc_domain(void) |
ba395927 | 1235 | { |
ba395927 | 1236 | struct dmar_domain *domain; |
ba395927 KA |
1237 | |
1238 | domain = alloc_domain_mem(); | |
1239 | if (!domain) | |
1240 | return NULL; | |
1241 | ||
4c923d47 | 1242 | domain->nid = -1; |
2c2e2c38 FY |
1243 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); |
1244 | domain->flags = 0; | |
1245 | ||
1246 | return domain; | |
1247 | } | |
1248 | ||
1249 | static int iommu_attach_domain(struct dmar_domain *domain, | |
1250 | struct intel_iommu *iommu) | |
1251 | { | |
1252 | int num; | |
1253 | unsigned long ndomains; | |
1254 | unsigned long flags; | |
1255 | ||
ba395927 KA |
1256 | ndomains = cap_ndoms(iommu->cap); |
1257 | ||
1258 | spin_lock_irqsave(&iommu->lock, flags); | |
2c2e2c38 | 1259 | |
ba395927 KA |
1260 | num = find_first_zero_bit(iommu->domain_ids, ndomains); |
1261 | if (num >= ndomains) { | |
1262 | spin_unlock_irqrestore(&iommu->lock, flags); | |
ba395927 | 1263 | printk(KERN_ERR "IOMMU: no free domain ids\n"); |
2c2e2c38 | 1264 | return -ENOMEM; |
ba395927 KA |
1265 | } |
1266 | ||
ba395927 | 1267 | domain->id = num; |
2c2e2c38 | 1268 | set_bit(num, iommu->domain_ids); |
8c11e798 | 1269 | set_bit(iommu->seq_id, &domain->iommu_bmp); |
ba395927 KA |
1270 | iommu->domains[num] = domain; |
1271 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1272 | ||
2c2e2c38 | 1273 | return 0; |
ba395927 KA |
1274 | } |
1275 | ||
2c2e2c38 FY |
1276 | static void iommu_detach_domain(struct dmar_domain *domain, |
1277 | struct intel_iommu *iommu) | |
ba395927 KA |
1278 | { |
1279 | unsigned long flags; | |
2c2e2c38 FY |
1280 | int num, ndomains; |
1281 | int found = 0; | |
ba395927 | 1282 | |
8c11e798 | 1283 | spin_lock_irqsave(&iommu->lock, flags); |
2c2e2c38 | 1284 | ndomains = cap_ndoms(iommu->cap); |
a45946ab | 1285 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
2c2e2c38 FY |
1286 | if (iommu->domains[num] == domain) { |
1287 | found = 1; | |
1288 | break; | |
1289 | } | |
2c2e2c38 FY |
1290 | } |
1291 | ||
1292 | if (found) { | |
1293 | clear_bit(num, iommu->domain_ids); | |
1294 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
1295 | iommu->domains[num] = NULL; | |
1296 | } | |
8c11e798 | 1297 | spin_unlock_irqrestore(&iommu->lock, flags); |
ba395927 KA |
1298 | } |
1299 | ||
1300 | static struct iova_domain reserved_iova_list; | |
8a443df4 | 1301 | static struct lock_class_key reserved_rbtree_key; |
ba395927 | 1302 | |
51a63e67 | 1303 | static int dmar_init_reserved_ranges(void) |
ba395927 KA |
1304 | { |
1305 | struct pci_dev *pdev = NULL; | |
1306 | struct iova *iova; | |
1307 | int i; | |
ba395927 | 1308 | |
f661197e | 1309 | init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN); |
ba395927 | 1310 | |
8a443df4 MG |
1311 | lockdep_set_class(&reserved_iova_list.iova_rbtree_lock, |
1312 | &reserved_rbtree_key); | |
1313 | ||
ba395927 KA |
1314 | /* IOAPIC ranges shouldn't be accessed by DMA */ |
1315 | iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START), | |
1316 | IOVA_PFN(IOAPIC_RANGE_END)); | |
51a63e67 | 1317 | if (!iova) { |
ba395927 | 1318 | printk(KERN_ERR "Reserve IOAPIC range failed\n"); |
51a63e67 JC |
1319 | return -ENODEV; |
1320 | } | |
ba395927 KA |
1321 | |
1322 | /* Reserve all PCI MMIO to avoid peer-to-peer access */ | |
1323 | for_each_pci_dev(pdev) { | |
1324 | struct resource *r; | |
1325 | ||
1326 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1327 | r = &pdev->resource[i]; | |
1328 | if (!r->flags || !(r->flags & IORESOURCE_MEM)) | |
1329 | continue; | |
1a4a4551 DW |
1330 | iova = reserve_iova(&reserved_iova_list, |
1331 | IOVA_PFN(r->start), | |
1332 | IOVA_PFN(r->end)); | |
51a63e67 | 1333 | if (!iova) { |
ba395927 | 1334 | printk(KERN_ERR "Reserve iova failed\n"); |
51a63e67 JC |
1335 | return -ENODEV; |
1336 | } | |
ba395927 KA |
1337 | } |
1338 | } | |
51a63e67 | 1339 | return 0; |
ba395927 KA |
1340 | } |
1341 | ||
1342 | static void domain_reserve_special_ranges(struct dmar_domain *domain) | |
1343 | { | |
1344 | copy_reserved_iova(&reserved_iova_list, &domain->iovad); | |
1345 | } | |
1346 | ||
1347 | static inline int guestwidth_to_adjustwidth(int gaw) | |
1348 | { | |
1349 | int agaw; | |
1350 | int r = (gaw - 12) % 9; | |
1351 | ||
1352 | if (r == 0) | |
1353 | agaw = gaw; | |
1354 | else | |
1355 | agaw = gaw + 9 - r; | |
1356 | if (agaw > 64) | |
1357 | agaw = 64; | |
1358 | return agaw; | |
1359 | } | |
1360 | ||
1361 | static int domain_init(struct dmar_domain *domain, int guest_width) | |
1362 | { | |
1363 | struct intel_iommu *iommu; | |
1364 | int adjust_width, agaw; | |
1365 | unsigned long sagaw; | |
1366 | ||
f661197e | 1367 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); |
c7151a8d | 1368 | spin_lock_init(&domain->iommu_lock); |
ba395927 KA |
1369 | |
1370 | domain_reserve_special_ranges(domain); | |
1371 | ||
1372 | /* calculate AGAW */ | |
8c11e798 | 1373 | iommu = domain_get_iommu(domain); |
ba395927 KA |
1374 | if (guest_width > cap_mgaw(iommu->cap)) |
1375 | guest_width = cap_mgaw(iommu->cap); | |
1376 | domain->gaw = guest_width; | |
1377 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
1378 | agaw = width_to_agaw(adjust_width); | |
1379 | sagaw = cap_sagaw(iommu->cap); | |
1380 | if (!test_bit(agaw, &sagaw)) { | |
1381 | /* hardware doesn't support it, choose a bigger one */ | |
1382 | pr_debug("IOMMU: hardware doesn't support agaw %d\n", agaw); | |
1383 | agaw = find_next_bit(&sagaw, 5, agaw); | |
1384 | if (agaw >= 5) | |
1385 | return -ENODEV; | |
1386 | } | |
1387 | domain->agaw = agaw; | |
1388 | INIT_LIST_HEAD(&domain->devices); | |
1389 | ||
8e604097 WH |
1390 | if (ecap_coherent(iommu->ecap)) |
1391 | domain->iommu_coherency = 1; | |
1392 | else | |
1393 | domain->iommu_coherency = 0; | |
1394 | ||
58c610bd SY |
1395 | if (ecap_sc_support(iommu->ecap)) |
1396 | domain->iommu_snooping = 1; | |
1397 | else | |
1398 | domain->iommu_snooping = 0; | |
1399 | ||
c7151a8d | 1400 | domain->iommu_count = 1; |
4c923d47 | 1401 | domain->nid = iommu->node; |
c7151a8d | 1402 | |
ba395927 | 1403 | /* always allocate the top pgd */ |
4c923d47 | 1404 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
ba395927 KA |
1405 | if (!domain->pgd) |
1406 | return -ENOMEM; | |
5b6985ce | 1407 | __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE); |
ba395927 KA |
1408 | return 0; |
1409 | } | |
1410 | ||
1411 | static void domain_exit(struct dmar_domain *domain) | |
1412 | { | |
2c2e2c38 FY |
1413 | struct dmar_drhd_unit *drhd; |
1414 | struct intel_iommu *iommu; | |
ba395927 KA |
1415 | |
1416 | /* Domain 0 is reserved, so dont process it */ | |
1417 | if (!domain) | |
1418 | return; | |
1419 | ||
1420 | domain_remove_dev_info(domain); | |
1421 | /* destroy iovas */ | |
1422 | put_iova_domain(&domain->iovad); | |
ba395927 KA |
1423 | |
1424 | /* clear ptes */ | |
595badf5 | 1425 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 KA |
1426 | |
1427 | /* free page tables */ | |
d794dc9b | 1428 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 | 1429 | |
2c2e2c38 FY |
1430 | for_each_active_iommu(iommu, drhd) |
1431 | if (test_bit(iommu->seq_id, &domain->iommu_bmp)) | |
1432 | iommu_detach_domain(domain, iommu); | |
1433 | ||
ba395927 KA |
1434 | free_domain_mem(domain); |
1435 | } | |
1436 | ||
4ed0d3e6 FY |
1437 | static int domain_context_mapping_one(struct dmar_domain *domain, int segment, |
1438 | u8 bus, u8 devfn, int translation) | |
ba395927 KA |
1439 | { |
1440 | struct context_entry *context; | |
ba395927 | 1441 | unsigned long flags; |
5331fe6f | 1442 | struct intel_iommu *iommu; |
ea6606b0 WH |
1443 | struct dma_pte *pgd; |
1444 | unsigned long num; | |
1445 | unsigned long ndomains; | |
1446 | int id; | |
1447 | int agaw; | |
93a23a72 | 1448 | struct device_domain_info *info = NULL; |
ba395927 KA |
1449 | |
1450 | pr_debug("Set context mapping for %02x:%02x.%d\n", | |
1451 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
4ed0d3e6 | 1452 | |
ba395927 | 1453 | BUG_ON(!domain->pgd); |
4ed0d3e6 FY |
1454 | BUG_ON(translation != CONTEXT_TT_PASS_THROUGH && |
1455 | translation != CONTEXT_TT_MULTI_LEVEL); | |
5331fe6f | 1456 | |
276dbf99 | 1457 | iommu = device_to_iommu(segment, bus, devfn); |
5331fe6f WH |
1458 | if (!iommu) |
1459 | return -ENODEV; | |
1460 | ||
ba395927 KA |
1461 | context = device_to_context_entry(iommu, bus, devfn); |
1462 | if (!context) | |
1463 | return -ENOMEM; | |
1464 | spin_lock_irqsave(&iommu->lock, flags); | |
c07e7d21 | 1465 | if (context_present(context)) { |
ba395927 KA |
1466 | spin_unlock_irqrestore(&iommu->lock, flags); |
1467 | return 0; | |
1468 | } | |
1469 | ||
ea6606b0 WH |
1470 | id = domain->id; |
1471 | pgd = domain->pgd; | |
1472 | ||
2c2e2c38 FY |
1473 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
1474 | domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) { | |
ea6606b0 WH |
1475 | int found = 0; |
1476 | ||
1477 | /* find an available domain id for this device in iommu */ | |
1478 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 1479 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
ea6606b0 WH |
1480 | if (iommu->domains[num] == domain) { |
1481 | id = num; | |
1482 | found = 1; | |
1483 | break; | |
1484 | } | |
ea6606b0 WH |
1485 | } |
1486 | ||
1487 | if (found == 0) { | |
1488 | num = find_first_zero_bit(iommu->domain_ids, ndomains); | |
1489 | if (num >= ndomains) { | |
1490 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1491 | printk(KERN_ERR "IOMMU: no free domain ids\n"); | |
1492 | return -EFAULT; | |
1493 | } | |
1494 | ||
1495 | set_bit(num, iommu->domain_ids); | |
1496 | iommu->domains[num] = domain; | |
1497 | id = num; | |
1498 | } | |
1499 | ||
1500 | /* Skip top levels of page tables for | |
1501 | * iommu which has less agaw than default. | |
1672af11 | 1502 | * Unnecessary for PT mode. |
ea6606b0 | 1503 | */ |
1672af11 CW |
1504 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1505 | for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) { | |
1506 | pgd = phys_to_virt(dma_pte_addr(pgd)); | |
1507 | if (!dma_pte_present(pgd)) { | |
1508 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1509 | return -ENOMEM; | |
1510 | } | |
ea6606b0 WH |
1511 | } |
1512 | } | |
1513 | } | |
1514 | ||
1515 | context_set_domain_id(context, id); | |
4ed0d3e6 | 1516 | |
93a23a72 YZ |
1517 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1518 | info = iommu_support_dev_iotlb(domain, segment, bus, devfn); | |
1519 | translation = info ? CONTEXT_TT_DEV_IOTLB : | |
1520 | CONTEXT_TT_MULTI_LEVEL; | |
1521 | } | |
4ed0d3e6 FY |
1522 | /* |
1523 | * In pass through mode, AW must be programmed to indicate the largest | |
1524 | * AGAW value supported by hardware. And ASR is ignored by hardware. | |
1525 | */ | |
93a23a72 | 1526 | if (unlikely(translation == CONTEXT_TT_PASS_THROUGH)) |
4ed0d3e6 | 1527 | context_set_address_width(context, iommu->msagaw); |
93a23a72 YZ |
1528 | else { |
1529 | context_set_address_root(context, virt_to_phys(pgd)); | |
1530 | context_set_address_width(context, iommu->agaw); | |
1531 | } | |
4ed0d3e6 FY |
1532 | |
1533 | context_set_translation_type(context, translation); | |
c07e7d21 MM |
1534 | context_set_fault_enable(context); |
1535 | context_set_present(context); | |
5331fe6f | 1536 | domain_flush_cache(domain, context, sizeof(*context)); |
ba395927 | 1537 | |
4c25a2c1 DW |
1538 | /* |
1539 | * It's a non-present to present mapping. If hardware doesn't cache | |
1540 | * non-present entry we only need to flush the write-buffer. If the | |
1541 | * _does_ cache non-present entries, then it does so in the special | |
1542 | * domain #0, which we have to flush: | |
1543 | */ | |
1544 | if (cap_caching_mode(iommu->cap)) { | |
1545 | iommu->flush.flush_context(iommu, 0, | |
1546 | (((u16)bus) << 8) | devfn, | |
1547 | DMA_CCMD_MASK_NOBIT, | |
1548 | DMA_CCMD_DEVICE_INVL); | |
82653633 | 1549 | iommu->flush.flush_iotlb(iommu, domain->id, 0, 0, DMA_TLB_DSI_FLUSH); |
4c25a2c1 | 1550 | } else { |
ba395927 | 1551 | iommu_flush_write_buffer(iommu); |
4c25a2c1 | 1552 | } |
93a23a72 | 1553 | iommu_enable_dev_iotlb(info); |
ba395927 | 1554 | spin_unlock_irqrestore(&iommu->lock, flags); |
c7151a8d WH |
1555 | |
1556 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1557 | if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) { | |
1558 | domain->iommu_count++; | |
4c923d47 SS |
1559 | if (domain->iommu_count == 1) |
1560 | domain->nid = iommu->node; | |
58c610bd | 1561 | domain_update_iommu_cap(domain); |
c7151a8d WH |
1562 | } |
1563 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
ba395927 KA |
1564 | return 0; |
1565 | } | |
1566 | ||
1567 | static int | |
4ed0d3e6 FY |
1568 | domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, |
1569 | int translation) | |
ba395927 KA |
1570 | { |
1571 | int ret; | |
1572 | struct pci_dev *tmp, *parent; | |
1573 | ||
276dbf99 | 1574 | ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus), |
4ed0d3e6 FY |
1575 | pdev->bus->number, pdev->devfn, |
1576 | translation); | |
ba395927 KA |
1577 | if (ret) |
1578 | return ret; | |
1579 | ||
1580 | /* dependent device mapping */ | |
1581 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1582 | if (!tmp) | |
1583 | return 0; | |
1584 | /* Secondary interface's bus number and devfn 0 */ | |
1585 | parent = pdev->bus->self; | |
1586 | while (parent != tmp) { | |
276dbf99 DW |
1587 | ret = domain_context_mapping_one(domain, |
1588 | pci_domain_nr(parent->bus), | |
1589 | parent->bus->number, | |
4ed0d3e6 | 1590 | parent->devfn, translation); |
ba395927 KA |
1591 | if (ret) |
1592 | return ret; | |
1593 | parent = parent->bus->self; | |
1594 | } | |
45e829ea | 1595 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
ba395927 | 1596 | return domain_context_mapping_one(domain, |
276dbf99 | 1597 | pci_domain_nr(tmp->subordinate), |
4ed0d3e6 FY |
1598 | tmp->subordinate->number, 0, |
1599 | translation); | |
ba395927 KA |
1600 | else /* this is a legacy PCI bridge */ |
1601 | return domain_context_mapping_one(domain, | |
276dbf99 DW |
1602 | pci_domain_nr(tmp->bus), |
1603 | tmp->bus->number, | |
4ed0d3e6 FY |
1604 | tmp->devfn, |
1605 | translation); | |
ba395927 KA |
1606 | } |
1607 | ||
5331fe6f | 1608 | static int domain_context_mapped(struct pci_dev *pdev) |
ba395927 KA |
1609 | { |
1610 | int ret; | |
1611 | struct pci_dev *tmp, *parent; | |
5331fe6f WH |
1612 | struct intel_iommu *iommu; |
1613 | ||
276dbf99 DW |
1614 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
1615 | pdev->devfn); | |
5331fe6f WH |
1616 | if (!iommu) |
1617 | return -ENODEV; | |
ba395927 | 1618 | |
276dbf99 | 1619 | ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); |
ba395927 KA |
1620 | if (!ret) |
1621 | return ret; | |
1622 | /* dependent device mapping */ | |
1623 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1624 | if (!tmp) | |
1625 | return ret; | |
1626 | /* Secondary interface's bus number and devfn 0 */ | |
1627 | parent = pdev->bus->self; | |
1628 | while (parent != tmp) { | |
8c11e798 | 1629 | ret = device_context_mapped(iommu, parent->bus->number, |
276dbf99 | 1630 | parent->devfn); |
ba395927 KA |
1631 | if (!ret) |
1632 | return ret; | |
1633 | parent = parent->bus->self; | |
1634 | } | |
5f4d91a1 | 1635 | if (pci_is_pcie(tmp)) |
276dbf99 DW |
1636 | return device_context_mapped(iommu, tmp->subordinate->number, |
1637 | 0); | |
ba395927 | 1638 | else |
276dbf99 DW |
1639 | return device_context_mapped(iommu, tmp->bus->number, |
1640 | tmp->devfn); | |
ba395927 KA |
1641 | } |
1642 | ||
f532959b FY |
1643 | /* Returns a number of VTD pages, but aligned to MM page size */ |
1644 | static inline unsigned long aligned_nrpages(unsigned long host_addr, | |
1645 | size_t size) | |
1646 | { | |
1647 | host_addr &= ~PAGE_MASK; | |
1648 | return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT; | |
1649 | } | |
1650 | ||
9051aa02 DW |
1651 | static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1652 | struct scatterlist *sg, unsigned long phys_pfn, | |
1653 | unsigned long nr_pages, int prot) | |
e1605495 DW |
1654 | { |
1655 | struct dma_pte *first_pte = NULL, *pte = NULL; | |
9051aa02 | 1656 | phys_addr_t uninitialized_var(pteval); |
e1605495 | 1657 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
9051aa02 | 1658 | unsigned long sg_res; |
e1605495 DW |
1659 | |
1660 | BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); | |
1661 | ||
1662 | if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) | |
1663 | return -EINVAL; | |
1664 | ||
1665 | prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP; | |
1666 | ||
9051aa02 DW |
1667 | if (sg) |
1668 | sg_res = 0; | |
1669 | else { | |
1670 | sg_res = nr_pages + 1; | |
1671 | pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot; | |
1672 | } | |
1673 | ||
e1605495 | 1674 | while (nr_pages--) { |
c85994e4 DW |
1675 | uint64_t tmp; |
1676 | ||
e1605495 | 1677 | if (!sg_res) { |
f532959b | 1678 | sg_res = aligned_nrpages(sg->offset, sg->length); |
e1605495 DW |
1679 | sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset; |
1680 | sg->dma_length = sg->length; | |
1681 | pteval = page_to_phys(sg_page(sg)) | prot; | |
1682 | } | |
1683 | if (!pte) { | |
1684 | first_pte = pte = pfn_to_dma_pte(domain, iov_pfn); | |
1685 | if (!pte) | |
1686 | return -ENOMEM; | |
1687 | } | |
1688 | /* We don't need lock here, nobody else | |
1689 | * touches the iova range | |
1690 | */ | |
7766a3fb | 1691 | tmp = cmpxchg64_local(&pte->val, 0ULL, pteval); |
c85994e4 | 1692 | if (tmp) { |
1bf20f0d | 1693 | static int dumps = 5; |
c85994e4 DW |
1694 | printk(KERN_CRIT "ERROR: DMA PTE for vPFN 0x%lx already set (to %llx not %llx)\n", |
1695 | iov_pfn, tmp, (unsigned long long)pteval); | |
1bf20f0d DW |
1696 | if (dumps) { |
1697 | dumps--; | |
1698 | debug_dma_dump_mappings(NULL); | |
1699 | } | |
1700 | WARN_ON(1); | |
1701 | } | |
e1605495 | 1702 | pte++; |
75e6bf96 | 1703 | if (!nr_pages || first_pte_in_page(pte)) { |
e1605495 DW |
1704 | domain_flush_cache(domain, first_pte, |
1705 | (void *)pte - (void *)first_pte); | |
1706 | pte = NULL; | |
1707 | } | |
1708 | iov_pfn++; | |
1709 | pteval += VTD_PAGE_SIZE; | |
1710 | sg_res--; | |
1711 | if (!sg_res) | |
1712 | sg = sg_next(sg); | |
1713 | } | |
1714 | return 0; | |
1715 | } | |
1716 | ||
9051aa02 DW |
1717 | static inline int domain_sg_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1718 | struct scatterlist *sg, unsigned long nr_pages, | |
1719 | int prot) | |
ba395927 | 1720 | { |
9051aa02 DW |
1721 | return __domain_mapping(domain, iov_pfn, sg, 0, nr_pages, prot); |
1722 | } | |
6f6a00e4 | 1723 | |
9051aa02 DW |
1724 | static inline int domain_pfn_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1725 | unsigned long phys_pfn, unsigned long nr_pages, | |
1726 | int prot) | |
1727 | { | |
1728 | return __domain_mapping(domain, iov_pfn, NULL, phys_pfn, nr_pages, prot); | |
ba395927 KA |
1729 | } |
1730 | ||
c7151a8d | 1731 | static void iommu_detach_dev(struct intel_iommu *iommu, u8 bus, u8 devfn) |
ba395927 | 1732 | { |
c7151a8d WH |
1733 | if (!iommu) |
1734 | return; | |
8c11e798 WH |
1735 | |
1736 | clear_context_table(iommu, bus, devfn); | |
1737 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
4c25a2c1 | 1738 | DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 1739 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
ba395927 KA |
1740 | } |
1741 | ||
1742 | static void domain_remove_dev_info(struct dmar_domain *domain) | |
1743 | { | |
1744 | struct device_domain_info *info; | |
1745 | unsigned long flags; | |
c7151a8d | 1746 | struct intel_iommu *iommu; |
ba395927 KA |
1747 | |
1748 | spin_lock_irqsave(&device_domain_lock, flags); | |
1749 | while (!list_empty(&domain->devices)) { | |
1750 | info = list_entry(domain->devices.next, | |
1751 | struct device_domain_info, link); | |
1752 | list_del(&info->link); | |
1753 | list_del(&info->global); | |
1754 | if (info->dev) | |
358dd8ac | 1755 | info->dev->dev.archdata.iommu = NULL; |
ba395927 KA |
1756 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1757 | ||
93a23a72 | 1758 | iommu_disable_dev_iotlb(info); |
276dbf99 | 1759 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 1760 | iommu_detach_dev(iommu, info->bus, info->devfn); |
ba395927 KA |
1761 | free_devinfo_mem(info); |
1762 | ||
1763 | spin_lock_irqsave(&device_domain_lock, flags); | |
1764 | } | |
1765 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * find_domain | |
358dd8ac | 1770 | * Note: we use struct pci_dev->dev.archdata.iommu stores the info |
ba395927 | 1771 | */ |
38717946 | 1772 | static struct dmar_domain * |
ba395927 KA |
1773 | find_domain(struct pci_dev *pdev) |
1774 | { | |
1775 | struct device_domain_info *info; | |
1776 | ||
1777 | /* No lock here, assumes no domain exit in normal case */ | |
358dd8ac | 1778 | info = pdev->dev.archdata.iommu; |
ba395927 KA |
1779 | if (info) |
1780 | return info->domain; | |
1781 | return NULL; | |
1782 | } | |
1783 | ||
ba395927 KA |
1784 | /* domain is initialized */ |
1785 | static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) | |
1786 | { | |
1787 | struct dmar_domain *domain, *found = NULL; | |
1788 | struct intel_iommu *iommu; | |
1789 | struct dmar_drhd_unit *drhd; | |
1790 | struct device_domain_info *info, *tmp; | |
1791 | struct pci_dev *dev_tmp; | |
1792 | unsigned long flags; | |
1793 | int bus = 0, devfn = 0; | |
276dbf99 | 1794 | int segment; |
2c2e2c38 | 1795 | int ret; |
ba395927 KA |
1796 | |
1797 | domain = find_domain(pdev); | |
1798 | if (domain) | |
1799 | return domain; | |
1800 | ||
276dbf99 DW |
1801 | segment = pci_domain_nr(pdev->bus); |
1802 | ||
ba395927 KA |
1803 | dev_tmp = pci_find_upstream_pcie_bridge(pdev); |
1804 | if (dev_tmp) { | |
5f4d91a1 | 1805 | if (pci_is_pcie(dev_tmp)) { |
ba395927 KA |
1806 | bus = dev_tmp->subordinate->number; |
1807 | devfn = 0; | |
1808 | } else { | |
1809 | bus = dev_tmp->bus->number; | |
1810 | devfn = dev_tmp->devfn; | |
1811 | } | |
1812 | spin_lock_irqsave(&device_domain_lock, flags); | |
1813 | list_for_each_entry(info, &device_domain_list, global) { | |
276dbf99 DW |
1814 | if (info->segment == segment && |
1815 | info->bus == bus && info->devfn == devfn) { | |
ba395927 KA |
1816 | found = info->domain; |
1817 | break; | |
1818 | } | |
1819 | } | |
1820 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1821 | /* pcie-pci bridge already has a domain, uses it */ | |
1822 | if (found) { | |
1823 | domain = found; | |
1824 | goto found_domain; | |
1825 | } | |
1826 | } | |
1827 | ||
2c2e2c38 FY |
1828 | domain = alloc_domain(); |
1829 | if (!domain) | |
1830 | goto error; | |
1831 | ||
ba395927 KA |
1832 | /* Allocate new domain for the device */ |
1833 | drhd = dmar_find_matched_drhd_unit(pdev); | |
1834 | if (!drhd) { | |
1835 | printk(KERN_ERR "IOMMU: can't find DMAR for device %s\n", | |
1836 | pci_name(pdev)); | |
1837 | return NULL; | |
1838 | } | |
1839 | iommu = drhd->iommu; | |
1840 | ||
2c2e2c38 FY |
1841 | ret = iommu_attach_domain(domain, iommu); |
1842 | if (ret) { | |
2fe9723d | 1843 | free_domain_mem(domain); |
ba395927 | 1844 | goto error; |
2c2e2c38 | 1845 | } |
ba395927 KA |
1846 | |
1847 | if (domain_init(domain, gaw)) { | |
1848 | domain_exit(domain); | |
1849 | goto error; | |
1850 | } | |
1851 | ||
1852 | /* register pcie-to-pci device */ | |
1853 | if (dev_tmp) { | |
1854 | info = alloc_devinfo_mem(); | |
1855 | if (!info) { | |
1856 | domain_exit(domain); | |
1857 | goto error; | |
1858 | } | |
276dbf99 | 1859 | info->segment = segment; |
ba395927 KA |
1860 | info->bus = bus; |
1861 | info->devfn = devfn; | |
1862 | info->dev = NULL; | |
1863 | info->domain = domain; | |
1864 | /* This domain is shared by devices under p2p bridge */ | |
3b5410e7 | 1865 | domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; |
ba395927 KA |
1866 | |
1867 | /* pcie-to-pci bridge already has a domain, uses it */ | |
1868 | found = NULL; | |
1869 | spin_lock_irqsave(&device_domain_lock, flags); | |
1870 | list_for_each_entry(tmp, &device_domain_list, global) { | |
276dbf99 DW |
1871 | if (tmp->segment == segment && |
1872 | tmp->bus == bus && tmp->devfn == devfn) { | |
ba395927 KA |
1873 | found = tmp->domain; |
1874 | break; | |
1875 | } | |
1876 | } | |
1877 | if (found) { | |
00dfff77 | 1878 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 KA |
1879 | free_devinfo_mem(info); |
1880 | domain_exit(domain); | |
1881 | domain = found; | |
1882 | } else { | |
1883 | list_add(&info->link, &domain->devices); | |
1884 | list_add(&info->global, &device_domain_list); | |
00dfff77 | 1885 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 | 1886 | } |
ba395927 KA |
1887 | } |
1888 | ||
1889 | found_domain: | |
1890 | info = alloc_devinfo_mem(); | |
1891 | if (!info) | |
1892 | goto error; | |
276dbf99 | 1893 | info->segment = segment; |
ba395927 KA |
1894 | info->bus = pdev->bus->number; |
1895 | info->devfn = pdev->devfn; | |
1896 | info->dev = pdev; | |
1897 | info->domain = domain; | |
1898 | spin_lock_irqsave(&device_domain_lock, flags); | |
1899 | /* somebody is fast */ | |
1900 | found = find_domain(pdev); | |
1901 | if (found != NULL) { | |
1902 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1903 | if (found != domain) { | |
1904 | domain_exit(domain); | |
1905 | domain = found; | |
1906 | } | |
1907 | free_devinfo_mem(info); | |
1908 | return domain; | |
1909 | } | |
1910 | list_add(&info->link, &domain->devices); | |
1911 | list_add(&info->global, &device_domain_list); | |
358dd8ac | 1912 | pdev->dev.archdata.iommu = info; |
ba395927 KA |
1913 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1914 | return domain; | |
1915 | error: | |
1916 | /* recheck it here, maybe others set it */ | |
1917 | return find_domain(pdev); | |
1918 | } | |
1919 | ||
2c2e2c38 | 1920 | static int iommu_identity_mapping; |
e0fc7e0b DW |
1921 | #define IDENTMAP_ALL 1 |
1922 | #define IDENTMAP_GFX 2 | |
1923 | #define IDENTMAP_AZALIA 4 | |
2c2e2c38 | 1924 | |
b213203e DW |
1925 | static int iommu_domain_identity_map(struct dmar_domain *domain, |
1926 | unsigned long long start, | |
1927 | unsigned long long end) | |
ba395927 | 1928 | { |
c5395d5c DW |
1929 | unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; |
1930 | unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; | |
1931 | ||
1932 | if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), | |
1933 | dma_to_mm_pfn(last_vpfn))) { | |
ba395927 | 1934 | printk(KERN_ERR "IOMMU: reserve iova failed\n"); |
b213203e | 1935 | return -ENOMEM; |
ba395927 KA |
1936 | } |
1937 | ||
c5395d5c DW |
1938 | pr_debug("Mapping reserved region %llx-%llx for domain %d\n", |
1939 | start, end, domain->id); | |
ba395927 KA |
1940 | /* |
1941 | * RMRR range might have overlap with physical memory range, | |
1942 | * clear it first | |
1943 | */ | |
c5395d5c | 1944 | dma_pte_clear_range(domain, first_vpfn, last_vpfn); |
ba395927 | 1945 | |
c5395d5c DW |
1946 | return domain_pfn_mapping(domain, first_vpfn, first_vpfn, |
1947 | last_vpfn - first_vpfn + 1, | |
61df7443 | 1948 | DMA_PTE_READ|DMA_PTE_WRITE); |
b213203e DW |
1949 | } |
1950 | ||
1951 | static int iommu_prepare_identity_map(struct pci_dev *pdev, | |
1952 | unsigned long long start, | |
1953 | unsigned long long end) | |
1954 | { | |
1955 | struct dmar_domain *domain; | |
1956 | int ret; | |
1957 | ||
c7ab48d2 | 1958 | domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH); |
b213203e DW |
1959 | if (!domain) |
1960 | return -ENOMEM; | |
1961 | ||
19943b0e DW |
1962 | /* For _hardware_ passthrough, don't bother. But for software |
1963 | passthrough, we do it anyway -- it may indicate a memory | |
1964 | range which is reserved in E820, so which didn't get set | |
1965 | up to start with in si_domain */ | |
1966 | if (domain == si_domain && hw_pass_through) { | |
1967 | printk("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", | |
1968 | pci_name(pdev), start, end); | |
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | printk(KERN_INFO | |
1973 | "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n", | |
1974 | pci_name(pdev), start, end); | |
2ff729f5 | 1975 | |
5595b528 DW |
1976 | if (end < start) { |
1977 | WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n" | |
1978 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
1979 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
1980 | dmi_get_system_info(DMI_BIOS_VERSION), | |
1981 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
1982 | ret = -EIO; | |
1983 | goto error; | |
1984 | } | |
1985 | ||
2ff729f5 DW |
1986 | if (end >> agaw_to_width(domain->agaw)) { |
1987 | WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n" | |
1988 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
1989 | agaw_to_width(domain->agaw), | |
1990 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
1991 | dmi_get_system_info(DMI_BIOS_VERSION), | |
1992 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
1993 | ret = -EIO; | |
1994 | goto error; | |
1995 | } | |
19943b0e | 1996 | |
b213203e | 1997 | ret = iommu_domain_identity_map(domain, start, end); |
ba395927 KA |
1998 | if (ret) |
1999 | goto error; | |
2000 | ||
2001 | /* context entry init */ | |
4ed0d3e6 | 2002 | ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
b213203e DW |
2003 | if (ret) |
2004 | goto error; | |
2005 | ||
2006 | return 0; | |
2007 | ||
2008 | error: | |
ba395927 KA |
2009 | domain_exit(domain); |
2010 | return ret; | |
ba395927 KA |
2011 | } |
2012 | ||
2013 | static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, | |
2014 | struct pci_dev *pdev) | |
2015 | { | |
358dd8ac | 2016 | if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) |
ba395927 KA |
2017 | return 0; |
2018 | return iommu_prepare_identity_map(pdev, rmrr->base_address, | |
2019 | rmrr->end_address + 1); | |
2020 | } | |
2021 | ||
49a0429e KA |
2022 | #ifdef CONFIG_DMAR_FLOPPY_WA |
2023 | static inline void iommu_prepare_isa(void) | |
2024 | { | |
2025 | struct pci_dev *pdev; | |
2026 | int ret; | |
2027 | ||
2028 | pdev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); | |
2029 | if (!pdev) | |
2030 | return; | |
2031 | ||
c7ab48d2 | 2032 | printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n"); |
49a0429e KA |
2033 | ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024); |
2034 | ||
2035 | if (ret) | |
c7ab48d2 DW |
2036 | printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; " |
2037 | "floppy might not work\n"); | |
49a0429e KA |
2038 | |
2039 | } | |
2040 | #else | |
2041 | static inline void iommu_prepare_isa(void) | |
2042 | { | |
2043 | return; | |
2044 | } | |
2045 | #endif /* !CONFIG_DMAR_FLPY_WA */ | |
2046 | ||
2c2e2c38 | 2047 | static int md_domain_init(struct dmar_domain *domain, int guest_width); |
c7ab48d2 DW |
2048 | |
2049 | static int __init si_domain_work_fn(unsigned long start_pfn, | |
2050 | unsigned long end_pfn, void *datax) | |
2051 | { | |
2052 | int *ret = datax; | |
2053 | ||
2054 | *ret = iommu_domain_identity_map(si_domain, | |
2055 | (uint64_t)start_pfn << PAGE_SHIFT, | |
2056 | (uint64_t)end_pfn << PAGE_SHIFT); | |
2057 | return *ret; | |
2058 | ||
2059 | } | |
2060 | ||
071e1374 | 2061 | static int __init si_domain_init(int hw) |
2c2e2c38 FY |
2062 | { |
2063 | struct dmar_drhd_unit *drhd; | |
2064 | struct intel_iommu *iommu; | |
c7ab48d2 | 2065 | int nid, ret = 0; |
2c2e2c38 FY |
2066 | |
2067 | si_domain = alloc_domain(); | |
2068 | if (!si_domain) | |
2069 | return -EFAULT; | |
2070 | ||
c7ab48d2 | 2071 | pr_debug("Identity mapping domain is domain %d\n", si_domain->id); |
2c2e2c38 FY |
2072 | |
2073 | for_each_active_iommu(iommu, drhd) { | |
2074 | ret = iommu_attach_domain(si_domain, iommu); | |
2075 | if (ret) { | |
2076 | domain_exit(si_domain); | |
2077 | return -EFAULT; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { | |
2082 | domain_exit(si_domain); | |
2083 | return -EFAULT; | |
2084 | } | |
2085 | ||
2086 | si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; | |
2087 | ||
19943b0e DW |
2088 | if (hw) |
2089 | return 0; | |
2090 | ||
c7ab48d2 DW |
2091 | for_each_online_node(nid) { |
2092 | work_with_active_regions(nid, si_domain_work_fn, &ret); | |
2093 | if (ret) | |
2094 | return ret; | |
2095 | } | |
2096 | ||
2c2e2c38 FY |
2097 | return 0; |
2098 | } | |
2099 | ||
2100 | static void domain_remove_one_dev_info(struct dmar_domain *domain, | |
2101 | struct pci_dev *pdev); | |
2102 | static int identity_mapping(struct pci_dev *pdev) | |
2103 | { | |
2104 | struct device_domain_info *info; | |
2105 | ||
2106 | if (likely(!iommu_identity_mapping)) | |
2107 | return 0; | |
2108 | ||
2109 | ||
2110 | list_for_each_entry(info, &si_domain->devices, link) | |
2111 | if (info->dev == pdev) | |
2112 | return 1; | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | static int domain_add_dev_info(struct dmar_domain *domain, | |
5fe60f4e DW |
2117 | struct pci_dev *pdev, |
2118 | int translation) | |
2c2e2c38 FY |
2119 | { |
2120 | struct device_domain_info *info; | |
2121 | unsigned long flags; | |
5fe60f4e | 2122 | int ret; |
2c2e2c38 FY |
2123 | |
2124 | info = alloc_devinfo_mem(); | |
2125 | if (!info) | |
2126 | return -ENOMEM; | |
2127 | ||
5fe60f4e DW |
2128 | ret = domain_context_mapping(domain, pdev, translation); |
2129 | if (ret) { | |
2130 | free_devinfo_mem(info); | |
2131 | return ret; | |
2132 | } | |
2133 | ||
2c2e2c38 FY |
2134 | info->segment = pci_domain_nr(pdev->bus); |
2135 | info->bus = pdev->bus->number; | |
2136 | info->devfn = pdev->devfn; | |
2137 | info->dev = pdev; | |
2138 | info->domain = domain; | |
2139 | ||
2140 | spin_lock_irqsave(&device_domain_lock, flags); | |
2141 | list_add(&info->link, &domain->devices); | |
2142 | list_add(&info->global, &device_domain_list); | |
2143 | pdev->dev.archdata.iommu = info; | |
2144 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2145 | ||
2146 | return 0; | |
2147 | } | |
2148 | ||
6941af28 DW |
2149 | static int iommu_should_identity_map(struct pci_dev *pdev, int startup) |
2150 | { | |
e0fc7e0b DW |
2151 | if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) |
2152 | return 1; | |
2153 | ||
2154 | if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) | |
2155 | return 1; | |
2156 | ||
2157 | if (!(iommu_identity_mapping & IDENTMAP_ALL)) | |
2158 | return 0; | |
6941af28 | 2159 | |
3dfc813d DW |
2160 | /* |
2161 | * We want to start off with all devices in the 1:1 domain, and | |
2162 | * take them out later if we find they can't access all of memory. | |
2163 | * | |
2164 | * However, we can't do this for PCI devices behind bridges, | |
2165 | * because all PCI devices behind the same bridge will end up | |
2166 | * with the same source-id on their transactions. | |
2167 | * | |
2168 | * Practically speaking, we can't change things around for these | |
2169 | * devices at run-time, because we can't be sure there'll be no | |
2170 | * DMA transactions in flight for any of their siblings. | |
2171 | * | |
2172 | * So PCI devices (unless they're on the root bus) as well as | |
2173 | * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of | |
2174 | * the 1:1 domain, just in _case_ one of their siblings turns out | |
2175 | * not to be able to map all of memory. | |
2176 | */ | |
5f4d91a1 | 2177 | if (!pci_is_pcie(pdev)) { |
3dfc813d DW |
2178 | if (!pci_is_root_bus(pdev->bus)) |
2179 | return 0; | |
2180 | if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) | |
2181 | return 0; | |
2182 | } else if (pdev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
2183 | return 0; | |
2184 | ||
2185 | /* | |
2186 | * At boot time, we don't yet know if devices will be 64-bit capable. | |
2187 | * Assume that they will -- if they turn out not to be, then we can | |
2188 | * take them out of the 1:1 domain later. | |
2189 | */ | |
6941af28 DW |
2190 | if (!startup) |
2191 | return pdev->dma_mask > DMA_BIT_MASK(32); | |
2192 | ||
2193 | return 1; | |
2194 | } | |
2195 | ||
071e1374 | 2196 | static int __init iommu_prepare_static_identity_mapping(int hw) |
2c2e2c38 | 2197 | { |
2c2e2c38 FY |
2198 | struct pci_dev *pdev = NULL; |
2199 | int ret; | |
2200 | ||
19943b0e | 2201 | ret = si_domain_init(hw); |
2c2e2c38 FY |
2202 | if (ret) |
2203 | return -EFAULT; | |
2204 | ||
2c2e2c38 | 2205 | for_each_pci_dev(pdev) { |
6941af28 | 2206 | if (iommu_should_identity_map(pdev, 1)) { |
19943b0e DW |
2207 | printk(KERN_INFO "IOMMU: %s identity mapping for device %s\n", |
2208 | hw ? "hardware" : "software", pci_name(pdev)); | |
62edf5dc | 2209 | |
5fe60f4e | 2210 | ret = domain_add_dev_info(si_domain, pdev, |
19943b0e | 2211 | hw ? CONTEXT_TT_PASS_THROUGH : |
62edf5dc DW |
2212 | CONTEXT_TT_MULTI_LEVEL); |
2213 | if (ret) | |
2214 | return ret; | |
62edf5dc | 2215 | } |
2c2e2c38 FY |
2216 | } |
2217 | ||
2218 | return 0; | |
2219 | } | |
2220 | ||
51a63e67 | 2221 | static int __init init_dmars(int force_on) |
ba395927 KA |
2222 | { |
2223 | struct dmar_drhd_unit *drhd; | |
2224 | struct dmar_rmrr_unit *rmrr; | |
2225 | struct pci_dev *pdev; | |
2226 | struct intel_iommu *iommu; | |
9d783ba0 | 2227 | int i, ret; |
2c2e2c38 | 2228 | |
ba395927 KA |
2229 | /* |
2230 | * for each drhd | |
2231 | * allocate root | |
2232 | * initialize and program root entry to not present | |
2233 | * endfor | |
2234 | */ | |
2235 | for_each_drhd_unit(drhd) { | |
5e0d2a6f | 2236 | g_num_of_iommus++; |
2237 | /* | |
2238 | * lock not needed as this is only incremented in the single | |
2239 | * threaded kernel __init code path all other access are read | |
2240 | * only | |
2241 | */ | |
2242 | } | |
2243 | ||
d9630fe9 WH |
2244 | g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), |
2245 | GFP_KERNEL); | |
2246 | if (!g_iommus) { | |
2247 | printk(KERN_ERR "Allocating global iommu array failed\n"); | |
2248 | ret = -ENOMEM; | |
2249 | goto error; | |
2250 | } | |
2251 | ||
80b20dd8 | 2252 | deferred_flush = kzalloc(g_num_of_iommus * |
2253 | sizeof(struct deferred_flush_tables), GFP_KERNEL); | |
2254 | if (!deferred_flush) { | |
5e0d2a6f | 2255 | ret = -ENOMEM; |
2256 | goto error; | |
2257 | } | |
2258 | ||
5e0d2a6f | 2259 | for_each_drhd_unit(drhd) { |
2260 | if (drhd->ignored) | |
2261 | continue; | |
1886e8a9 SS |
2262 | |
2263 | iommu = drhd->iommu; | |
d9630fe9 | 2264 | g_iommus[iommu->seq_id] = iommu; |
ba395927 | 2265 | |
e61d98d8 SS |
2266 | ret = iommu_init_domains(iommu); |
2267 | if (ret) | |
2268 | goto error; | |
2269 | ||
ba395927 KA |
2270 | /* |
2271 | * TBD: | |
2272 | * we could share the same root & context tables | |
25985edc | 2273 | * among all IOMMU's. Need to Split it later. |
ba395927 KA |
2274 | */ |
2275 | ret = iommu_alloc_root_entry(iommu); | |
2276 | if (ret) { | |
2277 | printk(KERN_ERR "IOMMU: allocate root entry failed\n"); | |
2278 | goto error; | |
2279 | } | |
4ed0d3e6 | 2280 | if (!ecap_pass_through(iommu->ecap)) |
19943b0e | 2281 | hw_pass_through = 0; |
ba395927 KA |
2282 | } |
2283 | ||
1531a6a6 SS |
2284 | /* |
2285 | * Start from the sane iommu hardware state. | |
2286 | */ | |
a77b67d4 YS |
2287 | for_each_drhd_unit(drhd) { |
2288 | if (drhd->ignored) | |
2289 | continue; | |
2290 | ||
2291 | iommu = drhd->iommu; | |
1531a6a6 SS |
2292 | |
2293 | /* | |
2294 | * If the queued invalidation is already initialized by us | |
2295 | * (for example, while enabling interrupt-remapping) then | |
2296 | * we got the things already rolling from a sane state. | |
2297 | */ | |
2298 | if (iommu->qi) | |
2299 | continue; | |
2300 | ||
2301 | /* | |
2302 | * Clear any previous faults. | |
2303 | */ | |
2304 | dmar_fault(-1, iommu); | |
2305 | /* | |
2306 | * Disable queued invalidation if supported and already enabled | |
2307 | * before OS handover. | |
2308 | */ | |
2309 | dmar_disable_qi(iommu); | |
2310 | } | |
2311 | ||
2312 | for_each_drhd_unit(drhd) { | |
2313 | if (drhd->ignored) | |
2314 | continue; | |
2315 | ||
2316 | iommu = drhd->iommu; | |
2317 | ||
a77b67d4 YS |
2318 | if (dmar_enable_qi(iommu)) { |
2319 | /* | |
2320 | * Queued Invalidate not enabled, use Register Based | |
2321 | * Invalidate | |
2322 | */ | |
2323 | iommu->flush.flush_context = __iommu_flush_context; | |
2324 | iommu->flush.flush_iotlb = __iommu_flush_iotlb; | |
680a7524 | 2325 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Register based " |
b4e0f9eb | 2326 | "invalidation\n", |
680a7524 | 2327 | iommu->seq_id, |
b4e0f9eb | 2328 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2329 | } else { |
2330 | iommu->flush.flush_context = qi_flush_context; | |
2331 | iommu->flush.flush_iotlb = qi_flush_iotlb; | |
680a7524 | 2332 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Queued " |
b4e0f9eb | 2333 | "invalidation\n", |
680a7524 | 2334 | iommu->seq_id, |
b4e0f9eb | 2335 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2336 | } |
2337 | } | |
2338 | ||
19943b0e | 2339 | if (iommu_pass_through) |
e0fc7e0b DW |
2340 | iommu_identity_mapping |= IDENTMAP_ALL; |
2341 | ||
19943b0e | 2342 | #ifdef CONFIG_DMAR_BROKEN_GFX_WA |
e0fc7e0b | 2343 | iommu_identity_mapping |= IDENTMAP_GFX; |
19943b0e | 2344 | #endif |
e0fc7e0b DW |
2345 | |
2346 | check_tylersburg_isoch(); | |
2347 | ||
ba395927 | 2348 | /* |
19943b0e DW |
2349 | * If pass through is not set or not enabled, setup context entries for |
2350 | * identity mappings for rmrr, gfx, and isa and may fall back to static | |
2351 | * identity mapping if iommu_identity_mapping is set. | |
ba395927 | 2352 | */ |
19943b0e DW |
2353 | if (iommu_identity_mapping) { |
2354 | ret = iommu_prepare_static_identity_mapping(hw_pass_through); | |
4ed0d3e6 | 2355 | if (ret) { |
19943b0e DW |
2356 | printk(KERN_CRIT "Failed to setup IOMMU pass-through\n"); |
2357 | goto error; | |
ba395927 KA |
2358 | } |
2359 | } | |
ba395927 | 2360 | /* |
19943b0e DW |
2361 | * For each rmrr |
2362 | * for each dev attached to rmrr | |
2363 | * do | |
2364 | * locate drhd for dev, alloc domain for dev | |
2365 | * allocate free domain | |
2366 | * allocate page table entries for rmrr | |
2367 | * if context not allocated for bus | |
2368 | * allocate and init context | |
2369 | * set present in root table for this bus | |
2370 | * init context with domain, translation etc | |
2371 | * endfor | |
2372 | * endfor | |
ba395927 | 2373 | */ |
19943b0e DW |
2374 | printk(KERN_INFO "IOMMU: Setting RMRR:\n"); |
2375 | for_each_rmrr_units(rmrr) { | |
2376 | for (i = 0; i < rmrr->devices_cnt; i++) { | |
2377 | pdev = rmrr->devices[i]; | |
2378 | /* | |
2379 | * some BIOS lists non-exist devices in DMAR | |
2380 | * table. | |
2381 | */ | |
2382 | if (!pdev) | |
2383 | continue; | |
2384 | ret = iommu_prepare_rmrr_dev(rmrr, pdev); | |
2385 | if (ret) | |
2386 | printk(KERN_ERR | |
2387 | "IOMMU: mapping reserved region failed\n"); | |
ba395927 | 2388 | } |
4ed0d3e6 | 2389 | } |
49a0429e | 2390 | |
19943b0e DW |
2391 | iommu_prepare_isa(); |
2392 | ||
ba395927 KA |
2393 | /* |
2394 | * for each drhd | |
2395 | * enable fault log | |
2396 | * global invalidate context cache | |
2397 | * global invalidate iotlb | |
2398 | * enable translation | |
2399 | */ | |
2400 | for_each_drhd_unit(drhd) { | |
51a63e67 JC |
2401 | if (drhd->ignored) { |
2402 | /* | |
2403 | * we always have to disable PMRs or DMA may fail on | |
2404 | * this device | |
2405 | */ | |
2406 | if (force_on) | |
2407 | iommu_disable_protect_mem_regions(drhd->iommu); | |
ba395927 | 2408 | continue; |
51a63e67 | 2409 | } |
ba395927 | 2410 | iommu = drhd->iommu; |
ba395927 KA |
2411 | |
2412 | iommu_flush_write_buffer(iommu); | |
2413 | ||
3460a6d9 KA |
2414 | ret = dmar_set_interrupt(iommu); |
2415 | if (ret) | |
2416 | goto error; | |
2417 | ||
ba395927 KA |
2418 | iommu_set_root_entry(iommu); |
2419 | ||
4c25a2c1 | 2420 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 2421 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
f8bab735 | 2422 | |
ba395927 KA |
2423 | ret = iommu_enable_translation(iommu); |
2424 | if (ret) | |
2425 | goto error; | |
b94996c9 DW |
2426 | |
2427 | iommu_disable_protect_mem_regions(iommu); | |
ba395927 KA |
2428 | } |
2429 | ||
2430 | return 0; | |
2431 | error: | |
2432 | for_each_drhd_unit(drhd) { | |
2433 | if (drhd->ignored) | |
2434 | continue; | |
2435 | iommu = drhd->iommu; | |
2436 | free_iommu(iommu); | |
2437 | } | |
d9630fe9 | 2438 | kfree(g_iommus); |
ba395927 KA |
2439 | return ret; |
2440 | } | |
2441 | ||
5a5e02a6 | 2442 | /* This takes a number of _MM_ pages, not VTD pages */ |
875764de DW |
2443 | static struct iova *intel_alloc_iova(struct device *dev, |
2444 | struct dmar_domain *domain, | |
2445 | unsigned long nrpages, uint64_t dma_mask) | |
ba395927 | 2446 | { |
ba395927 | 2447 | struct pci_dev *pdev = to_pci_dev(dev); |
ba395927 | 2448 | struct iova *iova = NULL; |
ba395927 | 2449 | |
875764de DW |
2450 | /* Restrict dma_mask to the width that the iommu can handle */ |
2451 | dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask); | |
2452 | ||
2453 | if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) { | |
ba395927 KA |
2454 | /* |
2455 | * First try to allocate an io virtual address in | |
284901a9 | 2456 | * DMA_BIT_MASK(32) and if that fails then try allocating |
3609801e | 2457 | * from higher range |
ba395927 | 2458 | */ |
875764de DW |
2459 | iova = alloc_iova(&domain->iovad, nrpages, |
2460 | IOVA_PFN(DMA_BIT_MASK(32)), 1); | |
2461 | if (iova) | |
2462 | return iova; | |
2463 | } | |
2464 | iova = alloc_iova(&domain->iovad, nrpages, IOVA_PFN(dma_mask), 1); | |
2465 | if (unlikely(!iova)) { | |
2466 | printk(KERN_ERR "Allocating %ld-page iova for %s failed", | |
2467 | nrpages, pci_name(pdev)); | |
f76aec76 KA |
2468 | return NULL; |
2469 | } | |
2470 | ||
2471 | return iova; | |
2472 | } | |
2473 | ||
147202aa | 2474 | static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) |
f76aec76 KA |
2475 | { |
2476 | struct dmar_domain *domain; | |
2477 | int ret; | |
2478 | ||
2479 | domain = get_domain_for_dev(pdev, | |
2480 | DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
2481 | if (!domain) { | |
2482 | printk(KERN_ERR | |
2483 | "Allocating domain for %s failed", pci_name(pdev)); | |
4fe05bbc | 2484 | return NULL; |
ba395927 KA |
2485 | } |
2486 | ||
2487 | /* make sure context mapping is ok */ | |
5331fe6f | 2488 | if (unlikely(!domain_context_mapped(pdev))) { |
4ed0d3e6 FY |
2489 | ret = domain_context_mapping(domain, pdev, |
2490 | CONTEXT_TT_MULTI_LEVEL); | |
f76aec76 KA |
2491 | if (ret) { |
2492 | printk(KERN_ERR | |
2493 | "Domain context map for %s failed", | |
2494 | pci_name(pdev)); | |
4fe05bbc | 2495 | return NULL; |
f76aec76 | 2496 | } |
ba395927 KA |
2497 | } |
2498 | ||
f76aec76 KA |
2499 | return domain; |
2500 | } | |
2501 | ||
147202aa DW |
2502 | static inline struct dmar_domain *get_valid_domain_for_dev(struct pci_dev *dev) |
2503 | { | |
2504 | struct device_domain_info *info; | |
2505 | ||
2506 | /* No lock here, assumes no domain exit in normal case */ | |
2507 | info = dev->dev.archdata.iommu; | |
2508 | if (likely(info)) | |
2509 | return info->domain; | |
2510 | ||
2511 | return __get_valid_domain_for_dev(dev); | |
2512 | } | |
2513 | ||
2c2e2c38 FY |
2514 | static int iommu_dummy(struct pci_dev *pdev) |
2515 | { | |
2516 | return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; | |
2517 | } | |
2518 | ||
2519 | /* Check if the pdev needs to go through non-identity map and unmap process.*/ | |
73676832 | 2520 | static int iommu_no_mapping(struct device *dev) |
2c2e2c38 | 2521 | { |
73676832 | 2522 | struct pci_dev *pdev; |
2c2e2c38 FY |
2523 | int found; |
2524 | ||
73676832 DW |
2525 | if (unlikely(dev->bus != &pci_bus_type)) |
2526 | return 1; | |
2527 | ||
2528 | pdev = to_pci_dev(dev); | |
1e4c64c4 DW |
2529 | if (iommu_dummy(pdev)) |
2530 | return 1; | |
2531 | ||
2c2e2c38 | 2532 | if (!iommu_identity_mapping) |
1e4c64c4 | 2533 | return 0; |
2c2e2c38 FY |
2534 | |
2535 | found = identity_mapping(pdev); | |
2536 | if (found) { | |
6941af28 | 2537 | if (iommu_should_identity_map(pdev, 0)) |
2c2e2c38 FY |
2538 | return 1; |
2539 | else { | |
2540 | /* | |
2541 | * 32 bit DMA is removed from si_domain and fall back | |
2542 | * to non-identity mapping. | |
2543 | */ | |
2544 | domain_remove_one_dev_info(si_domain, pdev); | |
2545 | printk(KERN_INFO "32bit %s uses non-identity mapping\n", | |
2546 | pci_name(pdev)); | |
2547 | return 0; | |
2548 | } | |
2549 | } else { | |
2550 | /* | |
2551 | * In case of a detached 64 bit DMA device from vm, the device | |
2552 | * is put into si_domain for identity mapping. | |
2553 | */ | |
6941af28 | 2554 | if (iommu_should_identity_map(pdev, 0)) { |
2c2e2c38 | 2555 | int ret; |
5fe60f4e DW |
2556 | ret = domain_add_dev_info(si_domain, pdev, |
2557 | hw_pass_through ? | |
2558 | CONTEXT_TT_PASS_THROUGH : | |
2559 | CONTEXT_TT_MULTI_LEVEL); | |
2c2e2c38 FY |
2560 | if (!ret) { |
2561 | printk(KERN_INFO "64bit %s uses identity mapping\n", | |
2562 | pci_name(pdev)); | |
2563 | return 1; | |
2564 | } | |
2565 | } | |
2566 | } | |
2567 | ||
1e4c64c4 | 2568 | return 0; |
2c2e2c38 FY |
2569 | } |
2570 | ||
bb9e6d65 FT |
2571 | static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, |
2572 | size_t size, int dir, u64 dma_mask) | |
f76aec76 KA |
2573 | { |
2574 | struct pci_dev *pdev = to_pci_dev(hwdev); | |
f76aec76 | 2575 | struct dmar_domain *domain; |
5b6985ce | 2576 | phys_addr_t start_paddr; |
f76aec76 KA |
2577 | struct iova *iova; |
2578 | int prot = 0; | |
6865f0d1 | 2579 | int ret; |
8c11e798 | 2580 | struct intel_iommu *iommu; |
33041ec0 | 2581 | unsigned long paddr_pfn = paddr >> PAGE_SHIFT; |
f76aec76 KA |
2582 | |
2583 | BUG_ON(dir == DMA_NONE); | |
2c2e2c38 | 2584 | |
73676832 | 2585 | if (iommu_no_mapping(hwdev)) |
6865f0d1 | 2586 | return paddr; |
f76aec76 KA |
2587 | |
2588 | domain = get_valid_domain_for_dev(pdev); | |
2589 | if (!domain) | |
2590 | return 0; | |
2591 | ||
8c11e798 | 2592 | iommu = domain_get_iommu(domain); |
88cb6a74 | 2593 | size = aligned_nrpages(paddr, size); |
f76aec76 | 2594 | |
5a5e02a6 DW |
2595 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
2596 | pdev->dma_mask); | |
f76aec76 KA |
2597 | if (!iova) |
2598 | goto error; | |
2599 | ||
ba395927 KA |
2600 | /* |
2601 | * Check if DMAR supports zero-length reads on write only | |
2602 | * mappings.. | |
2603 | */ | |
2604 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2605 | !cap_zlr(iommu->cap)) |
ba395927 KA |
2606 | prot |= DMA_PTE_READ; |
2607 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2608 | prot |= DMA_PTE_WRITE; | |
2609 | /* | |
6865f0d1 | 2610 | * paddr - (paddr + size) might be partial page, we should map the whole |
ba395927 | 2611 | * page. Note: if two part of one page are separately mapped, we |
6865f0d1 | 2612 | * might have two guest_addr mapping to the same host paddr, but this |
ba395927 KA |
2613 | * is not a big problem |
2614 | */ | |
0ab36de2 | 2615 | ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo), |
33041ec0 | 2616 | mm_to_dma_pfn(paddr_pfn), size, prot); |
ba395927 KA |
2617 | if (ret) |
2618 | goto error; | |
2619 | ||
1f0ef2aa DW |
2620 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2621 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 2622 | iommu_flush_iotlb_psi(iommu, domain->id, mm_to_dma_pfn(iova->pfn_lo), size, 1); |
1f0ef2aa | 2623 | else |
8c11e798 | 2624 | iommu_flush_write_buffer(iommu); |
f76aec76 | 2625 | |
03d6a246 DW |
2626 | start_paddr = (phys_addr_t)iova->pfn_lo << PAGE_SHIFT; |
2627 | start_paddr += paddr & ~PAGE_MASK; | |
2628 | return start_paddr; | |
ba395927 | 2629 | |
ba395927 | 2630 | error: |
f76aec76 KA |
2631 | if (iova) |
2632 | __free_iova(&domain->iovad, iova); | |
4cf2e75d | 2633 | printk(KERN_ERR"Device %s request: %zx@%llx dir %d --- failed\n", |
5b6985ce | 2634 | pci_name(pdev), size, (unsigned long long)paddr, dir); |
ba395927 KA |
2635 | return 0; |
2636 | } | |
2637 | ||
ffbbef5c FT |
2638 | static dma_addr_t intel_map_page(struct device *dev, struct page *page, |
2639 | unsigned long offset, size_t size, | |
2640 | enum dma_data_direction dir, | |
2641 | struct dma_attrs *attrs) | |
bb9e6d65 | 2642 | { |
ffbbef5c FT |
2643 | return __intel_map_single(dev, page_to_phys(page) + offset, size, |
2644 | dir, to_pci_dev(dev)->dma_mask); | |
bb9e6d65 FT |
2645 | } |
2646 | ||
5e0d2a6f | 2647 | static void flush_unmaps(void) |
2648 | { | |
80b20dd8 | 2649 | int i, j; |
5e0d2a6f | 2650 | |
5e0d2a6f | 2651 | timer_on = 0; |
2652 | ||
2653 | /* just flush them all */ | |
2654 | for (i = 0; i < g_num_of_iommus; i++) { | |
a2bb8459 WH |
2655 | struct intel_iommu *iommu = g_iommus[i]; |
2656 | if (!iommu) | |
2657 | continue; | |
c42d9f32 | 2658 | |
9dd2fe89 YZ |
2659 | if (!deferred_flush[i].next) |
2660 | continue; | |
2661 | ||
78d5f0f5 NA |
2662 | /* In caching mode, global flushes turn emulation expensive */ |
2663 | if (!cap_caching_mode(iommu->cap)) | |
2664 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, | |
93a23a72 | 2665 | DMA_TLB_GLOBAL_FLUSH); |
9dd2fe89 | 2666 | for (j = 0; j < deferred_flush[i].next; j++) { |
93a23a72 YZ |
2667 | unsigned long mask; |
2668 | struct iova *iova = deferred_flush[i].iova[j]; | |
78d5f0f5 NA |
2669 | struct dmar_domain *domain = deferred_flush[i].domain[j]; |
2670 | ||
2671 | /* On real hardware multiple invalidations are expensive */ | |
2672 | if (cap_caching_mode(iommu->cap)) | |
2673 | iommu_flush_iotlb_psi(iommu, domain->id, | |
2674 | iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1, 0); | |
2675 | else { | |
2676 | mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1)); | |
2677 | iommu_flush_dev_iotlb(deferred_flush[i].domain[j], | |
2678 | (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); | |
2679 | } | |
93a23a72 | 2680 | __free_iova(&deferred_flush[i].domain[j]->iovad, iova); |
80b20dd8 | 2681 | } |
9dd2fe89 | 2682 | deferred_flush[i].next = 0; |
5e0d2a6f | 2683 | } |
2684 | ||
5e0d2a6f | 2685 | list_size = 0; |
5e0d2a6f | 2686 | } |
2687 | ||
2688 | static void flush_unmaps_timeout(unsigned long data) | |
2689 | { | |
80b20dd8 | 2690 | unsigned long flags; |
2691 | ||
2692 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
5e0d2a6f | 2693 | flush_unmaps(); |
80b20dd8 | 2694 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); |
5e0d2a6f | 2695 | } |
2696 | ||
2697 | static void add_unmap(struct dmar_domain *dom, struct iova *iova) | |
2698 | { | |
2699 | unsigned long flags; | |
80b20dd8 | 2700 | int next, iommu_id; |
8c11e798 | 2701 | struct intel_iommu *iommu; |
5e0d2a6f | 2702 | |
2703 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
80b20dd8 | 2704 | if (list_size == HIGH_WATER_MARK) |
2705 | flush_unmaps(); | |
2706 | ||
8c11e798 WH |
2707 | iommu = domain_get_iommu(dom); |
2708 | iommu_id = iommu->seq_id; | |
c42d9f32 | 2709 | |
80b20dd8 | 2710 | next = deferred_flush[iommu_id].next; |
2711 | deferred_flush[iommu_id].domain[next] = dom; | |
2712 | deferred_flush[iommu_id].iova[next] = iova; | |
2713 | deferred_flush[iommu_id].next++; | |
5e0d2a6f | 2714 | |
2715 | if (!timer_on) { | |
2716 | mod_timer(&unmap_timer, jiffies + msecs_to_jiffies(10)); | |
2717 | timer_on = 1; | |
2718 | } | |
2719 | list_size++; | |
2720 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); | |
2721 | } | |
2722 | ||
ffbbef5c FT |
2723 | static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, |
2724 | size_t size, enum dma_data_direction dir, | |
2725 | struct dma_attrs *attrs) | |
ba395927 | 2726 | { |
ba395927 | 2727 | struct pci_dev *pdev = to_pci_dev(dev); |
f76aec76 | 2728 | struct dmar_domain *domain; |
d794dc9b | 2729 | unsigned long start_pfn, last_pfn; |
ba395927 | 2730 | struct iova *iova; |
8c11e798 | 2731 | struct intel_iommu *iommu; |
ba395927 | 2732 | |
73676832 | 2733 | if (iommu_no_mapping(dev)) |
f76aec76 | 2734 | return; |
2c2e2c38 | 2735 | |
ba395927 KA |
2736 | domain = find_domain(pdev); |
2737 | BUG_ON(!domain); | |
2738 | ||
8c11e798 WH |
2739 | iommu = domain_get_iommu(domain); |
2740 | ||
ba395927 | 2741 | iova = find_iova(&domain->iovad, IOVA_PFN(dev_addr)); |
85b98276 DW |
2742 | if (WARN_ONCE(!iova, "Driver unmaps unmatched page at PFN %llx\n", |
2743 | (unsigned long long)dev_addr)) | |
ba395927 | 2744 | return; |
ba395927 | 2745 | |
d794dc9b DW |
2746 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2747 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
ba395927 | 2748 | |
d794dc9b DW |
2749 | pr_debug("Device %s unmapping: pfn %lx-%lx\n", |
2750 | pci_name(pdev), start_pfn, last_pfn); | |
ba395927 | 2751 | |
f76aec76 | 2752 | /* clear the whole page */ |
d794dc9b DW |
2753 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2754 | ||
f76aec76 | 2755 | /* free page tables */ |
d794dc9b DW |
2756 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
2757 | ||
5e0d2a6f | 2758 | if (intel_iommu_strict) { |
03d6a246 | 2759 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, |
82653633 | 2760 | last_pfn - start_pfn + 1, 0); |
5e0d2a6f | 2761 | /* free iova */ |
2762 | __free_iova(&domain->iovad, iova); | |
2763 | } else { | |
2764 | add_unmap(domain, iova); | |
2765 | /* | |
2766 | * queue up the release of the unmap to save the 1/6th of the | |
2767 | * cpu used up by the iotlb flush operation... | |
2768 | */ | |
5e0d2a6f | 2769 | } |
ba395927 KA |
2770 | } |
2771 | ||
d7ab5c46 FT |
2772 | static void *intel_alloc_coherent(struct device *hwdev, size_t size, |
2773 | dma_addr_t *dma_handle, gfp_t flags) | |
ba395927 KA |
2774 | { |
2775 | void *vaddr; | |
2776 | int order; | |
2777 | ||
5b6985ce | 2778 | size = PAGE_ALIGN(size); |
ba395927 | 2779 | order = get_order(size); |
e8bb910d AW |
2780 | |
2781 | if (!iommu_no_mapping(hwdev)) | |
2782 | flags &= ~(GFP_DMA | GFP_DMA32); | |
2783 | else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) { | |
2784 | if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32)) | |
2785 | flags |= GFP_DMA; | |
2786 | else | |
2787 | flags |= GFP_DMA32; | |
2788 | } | |
ba395927 KA |
2789 | |
2790 | vaddr = (void *)__get_free_pages(flags, order); | |
2791 | if (!vaddr) | |
2792 | return NULL; | |
2793 | memset(vaddr, 0, size); | |
2794 | ||
bb9e6d65 FT |
2795 | *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size, |
2796 | DMA_BIDIRECTIONAL, | |
2797 | hwdev->coherent_dma_mask); | |
ba395927 KA |
2798 | if (*dma_handle) |
2799 | return vaddr; | |
2800 | free_pages((unsigned long)vaddr, order); | |
2801 | return NULL; | |
2802 | } | |
2803 | ||
d7ab5c46 FT |
2804 | static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr, |
2805 | dma_addr_t dma_handle) | |
ba395927 KA |
2806 | { |
2807 | int order; | |
2808 | ||
5b6985ce | 2809 | size = PAGE_ALIGN(size); |
ba395927 KA |
2810 | order = get_order(size); |
2811 | ||
0db9b7ae | 2812 | intel_unmap_page(hwdev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); |
ba395927 KA |
2813 | free_pages((unsigned long)vaddr, order); |
2814 | } | |
2815 | ||
d7ab5c46 FT |
2816 | static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, |
2817 | int nelems, enum dma_data_direction dir, | |
2818 | struct dma_attrs *attrs) | |
ba395927 | 2819 | { |
ba395927 KA |
2820 | struct pci_dev *pdev = to_pci_dev(hwdev); |
2821 | struct dmar_domain *domain; | |
d794dc9b | 2822 | unsigned long start_pfn, last_pfn; |
f76aec76 | 2823 | struct iova *iova; |
8c11e798 | 2824 | struct intel_iommu *iommu; |
ba395927 | 2825 | |
73676832 | 2826 | if (iommu_no_mapping(hwdev)) |
ba395927 KA |
2827 | return; |
2828 | ||
2829 | domain = find_domain(pdev); | |
8c11e798 WH |
2830 | BUG_ON(!domain); |
2831 | ||
2832 | iommu = domain_get_iommu(domain); | |
ba395927 | 2833 | |
c03ab37c | 2834 | iova = find_iova(&domain->iovad, IOVA_PFN(sglist[0].dma_address)); |
85b98276 DW |
2835 | if (WARN_ONCE(!iova, "Driver unmaps unmatched sglist at PFN %llx\n", |
2836 | (unsigned long long)sglist[0].dma_address)) | |
f76aec76 | 2837 | return; |
f76aec76 | 2838 | |
d794dc9b DW |
2839 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2840 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
f76aec76 KA |
2841 | |
2842 | /* clear the whole page */ | |
d794dc9b DW |
2843 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2844 | ||
f76aec76 | 2845 | /* free page tables */ |
d794dc9b | 2846 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
f76aec76 | 2847 | |
acea0018 DW |
2848 | if (intel_iommu_strict) { |
2849 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, | |
82653633 | 2850 | last_pfn - start_pfn + 1, 0); |
acea0018 DW |
2851 | /* free iova */ |
2852 | __free_iova(&domain->iovad, iova); | |
2853 | } else { | |
2854 | add_unmap(domain, iova); | |
2855 | /* | |
2856 | * queue up the release of the unmap to save the 1/6th of the | |
2857 | * cpu used up by the iotlb flush operation... | |
2858 | */ | |
2859 | } | |
ba395927 KA |
2860 | } |
2861 | ||
ba395927 | 2862 | static int intel_nontranslate_map_sg(struct device *hddev, |
c03ab37c | 2863 | struct scatterlist *sglist, int nelems, int dir) |
ba395927 KA |
2864 | { |
2865 | int i; | |
c03ab37c | 2866 | struct scatterlist *sg; |
ba395927 | 2867 | |
c03ab37c | 2868 | for_each_sg(sglist, sg, nelems, i) { |
12d4d40e | 2869 | BUG_ON(!sg_page(sg)); |
4cf2e75d | 2870 | sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset; |
c03ab37c | 2871 | sg->dma_length = sg->length; |
ba395927 KA |
2872 | } |
2873 | return nelems; | |
2874 | } | |
2875 | ||
d7ab5c46 FT |
2876 | static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems, |
2877 | enum dma_data_direction dir, struct dma_attrs *attrs) | |
ba395927 | 2878 | { |
ba395927 | 2879 | int i; |
ba395927 KA |
2880 | struct pci_dev *pdev = to_pci_dev(hwdev); |
2881 | struct dmar_domain *domain; | |
f76aec76 KA |
2882 | size_t size = 0; |
2883 | int prot = 0; | |
f76aec76 KA |
2884 | struct iova *iova = NULL; |
2885 | int ret; | |
c03ab37c | 2886 | struct scatterlist *sg; |
b536d24d | 2887 | unsigned long start_vpfn; |
8c11e798 | 2888 | struct intel_iommu *iommu; |
ba395927 KA |
2889 | |
2890 | BUG_ON(dir == DMA_NONE); | |
73676832 | 2891 | if (iommu_no_mapping(hwdev)) |
c03ab37c | 2892 | return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir); |
ba395927 | 2893 | |
f76aec76 KA |
2894 | domain = get_valid_domain_for_dev(pdev); |
2895 | if (!domain) | |
2896 | return 0; | |
2897 | ||
8c11e798 WH |
2898 | iommu = domain_get_iommu(domain); |
2899 | ||
b536d24d | 2900 | for_each_sg(sglist, sg, nelems, i) |
88cb6a74 | 2901 | size += aligned_nrpages(sg->offset, sg->length); |
f76aec76 | 2902 | |
5a5e02a6 DW |
2903 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
2904 | pdev->dma_mask); | |
f76aec76 | 2905 | if (!iova) { |
c03ab37c | 2906 | sglist->dma_length = 0; |
f76aec76 KA |
2907 | return 0; |
2908 | } | |
2909 | ||
2910 | /* | |
2911 | * Check if DMAR supports zero-length reads on write only | |
2912 | * mappings.. | |
2913 | */ | |
2914 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2915 | !cap_zlr(iommu->cap)) |
f76aec76 KA |
2916 | prot |= DMA_PTE_READ; |
2917 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2918 | prot |= DMA_PTE_WRITE; | |
2919 | ||
b536d24d | 2920 | start_vpfn = mm_to_dma_pfn(iova->pfn_lo); |
e1605495 | 2921 | |
f532959b | 2922 | ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot); |
e1605495 DW |
2923 | if (unlikely(ret)) { |
2924 | /* clear the page */ | |
2925 | dma_pte_clear_range(domain, start_vpfn, | |
2926 | start_vpfn + size - 1); | |
2927 | /* free page tables */ | |
2928 | dma_pte_free_pagetable(domain, start_vpfn, | |
2929 | start_vpfn + size - 1); | |
2930 | /* free iova */ | |
2931 | __free_iova(&domain->iovad, iova); | |
2932 | return 0; | |
ba395927 KA |
2933 | } |
2934 | ||
1f0ef2aa DW |
2935 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2936 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 2937 | iommu_flush_iotlb_psi(iommu, domain->id, start_vpfn, size, 1); |
1f0ef2aa | 2938 | else |
8c11e798 | 2939 | iommu_flush_write_buffer(iommu); |
1f0ef2aa | 2940 | |
ba395927 KA |
2941 | return nelems; |
2942 | } | |
2943 | ||
dfb805e8 FT |
2944 | static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) |
2945 | { | |
2946 | return !dma_addr; | |
2947 | } | |
2948 | ||
160c1d8e | 2949 | struct dma_map_ops intel_dma_ops = { |
ba395927 KA |
2950 | .alloc_coherent = intel_alloc_coherent, |
2951 | .free_coherent = intel_free_coherent, | |
ba395927 KA |
2952 | .map_sg = intel_map_sg, |
2953 | .unmap_sg = intel_unmap_sg, | |
ffbbef5c FT |
2954 | .map_page = intel_map_page, |
2955 | .unmap_page = intel_unmap_page, | |
dfb805e8 | 2956 | .mapping_error = intel_mapping_error, |
ba395927 KA |
2957 | }; |
2958 | ||
2959 | static inline int iommu_domain_cache_init(void) | |
2960 | { | |
2961 | int ret = 0; | |
2962 | ||
2963 | iommu_domain_cache = kmem_cache_create("iommu_domain", | |
2964 | sizeof(struct dmar_domain), | |
2965 | 0, | |
2966 | SLAB_HWCACHE_ALIGN, | |
2967 | ||
2968 | NULL); | |
2969 | if (!iommu_domain_cache) { | |
2970 | printk(KERN_ERR "Couldn't create iommu_domain cache\n"); | |
2971 | ret = -ENOMEM; | |
2972 | } | |
2973 | ||
2974 | return ret; | |
2975 | } | |
2976 | ||
2977 | static inline int iommu_devinfo_cache_init(void) | |
2978 | { | |
2979 | int ret = 0; | |
2980 | ||
2981 | iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", | |
2982 | sizeof(struct device_domain_info), | |
2983 | 0, | |
2984 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
2985 | NULL); |
2986 | if (!iommu_devinfo_cache) { | |
2987 | printk(KERN_ERR "Couldn't create devinfo cache\n"); | |
2988 | ret = -ENOMEM; | |
2989 | } | |
2990 | ||
2991 | return ret; | |
2992 | } | |
2993 | ||
2994 | static inline int iommu_iova_cache_init(void) | |
2995 | { | |
2996 | int ret = 0; | |
2997 | ||
2998 | iommu_iova_cache = kmem_cache_create("iommu_iova", | |
2999 | sizeof(struct iova), | |
3000 | 0, | |
3001 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
3002 | NULL); |
3003 | if (!iommu_iova_cache) { | |
3004 | printk(KERN_ERR "Couldn't create iova cache\n"); | |
3005 | ret = -ENOMEM; | |
3006 | } | |
3007 | ||
3008 | return ret; | |
3009 | } | |
3010 | ||
3011 | static int __init iommu_init_mempool(void) | |
3012 | { | |
3013 | int ret; | |
3014 | ret = iommu_iova_cache_init(); | |
3015 | if (ret) | |
3016 | return ret; | |
3017 | ||
3018 | ret = iommu_domain_cache_init(); | |
3019 | if (ret) | |
3020 | goto domain_error; | |
3021 | ||
3022 | ret = iommu_devinfo_cache_init(); | |
3023 | if (!ret) | |
3024 | return ret; | |
3025 | ||
3026 | kmem_cache_destroy(iommu_domain_cache); | |
3027 | domain_error: | |
3028 | kmem_cache_destroy(iommu_iova_cache); | |
3029 | ||
3030 | return -ENOMEM; | |
3031 | } | |
3032 | ||
3033 | static void __init iommu_exit_mempool(void) | |
3034 | { | |
3035 | kmem_cache_destroy(iommu_devinfo_cache); | |
3036 | kmem_cache_destroy(iommu_domain_cache); | |
3037 | kmem_cache_destroy(iommu_iova_cache); | |
3038 | ||
3039 | } | |
3040 | ||
556ab45f DW |
3041 | static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) |
3042 | { | |
3043 | struct dmar_drhd_unit *drhd; | |
3044 | u32 vtbar; | |
3045 | int rc; | |
3046 | ||
3047 | /* We know that this device on this chipset has its own IOMMU. | |
3048 | * If we find it under a different IOMMU, then the BIOS is lying | |
3049 | * to us. Hope that the IOMMU for this device is actually | |
3050 | * disabled, and it needs no translation... | |
3051 | */ | |
3052 | rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar); | |
3053 | if (rc) { | |
3054 | /* "can't" happen */ | |
3055 | dev_info(&pdev->dev, "failed to run vt-d quirk\n"); | |
3056 | return; | |
3057 | } | |
3058 | vtbar &= 0xffff0000; | |
3059 | ||
3060 | /* we know that the this iommu should be at offset 0xa000 from vtbar */ | |
3061 | drhd = dmar_find_matched_drhd_unit(pdev); | |
3062 | if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000, | |
3063 | TAINT_FIRMWARE_WORKAROUND, | |
3064 | "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n")) | |
3065 | pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
3066 | } | |
3067 | DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); | |
3068 | ||
ba395927 KA |
3069 | static void __init init_no_remapping_devices(void) |
3070 | { | |
3071 | struct dmar_drhd_unit *drhd; | |
3072 | ||
3073 | for_each_drhd_unit(drhd) { | |
3074 | if (!drhd->include_all) { | |
3075 | int i; | |
3076 | for (i = 0; i < drhd->devices_cnt; i++) | |
3077 | if (drhd->devices[i] != NULL) | |
3078 | break; | |
3079 | /* ignore DMAR unit if no pci devices exist */ | |
3080 | if (i == drhd->devices_cnt) | |
3081 | drhd->ignored = 1; | |
3082 | } | |
3083 | } | |
3084 | ||
3085 | if (dmar_map_gfx) | |
3086 | return; | |
3087 | ||
3088 | for_each_drhd_unit(drhd) { | |
3089 | int i; | |
3090 | if (drhd->ignored || drhd->include_all) | |
3091 | continue; | |
3092 | ||
3093 | for (i = 0; i < drhd->devices_cnt; i++) | |
3094 | if (drhd->devices[i] && | |
3095 | !IS_GFX_DEVICE(drhd->devices[i])) | |
3096 | break; | |
3097 | ||
3098 | if (i < drhd->devices_cnt) | |
3099 | continue; | |
3100 | ||
3101 | /* bypass IOMMU if it is just for gfx devices */ | |
3102 | drhd->ignored = 1; | |
3103 | for (i = 0; i < drhd->devices_cnt; i++) { | |
3104 | if (!drhd->devices[i]) | |
3105 | continue; | |
358dd8ac | 3106 | drhd->devices[i]->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; |
ba395927 KA |
3107 | } |
3108 | } | |
3109 | } | |
3110 | ||
f59c7b69 FY |
3111 | #ifdef CONFIG_SUSPEND |
3112 | static int init_iommu_hw(void) | |
3113 | { | |
3114 | struct dmar_drhd_unit *drhd; | |
3115 | struct intel_iommu *iommu = NULL; | |
3116 | ||
3117 | for_each_active_iommu(iommu, drhd) | |
3118 | if (iommu->qi) | |
3119 | dmar_reenable_qi(iommu); | |
3120 | ||
3121 | for_each_active_iommu(iommu, drhd) { | |
3122 | iommu_flush_write_buffer(iommu); | |
3123 | ||
3124 | iommu_set_root_entry(iommu); | |
3125 | ||
3126 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3127 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3128 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3129 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 | 3130 | iommu_enable_translation(iommu); |
b94996c9 | 3131 | iommu_disable_protect_mem_regions(iommu); |
f59c7b69 FY |
3132 | } |
3133 | ||
3134 | return 0; | |
3135 | } | |
3136 | ||
3137 | static void iommu_flush_all(void) | |
3138 | { | |
3139 | struct dmar_drhd_unit *drhd; | |
3140 | struct intel_iommu *iommu; | |
3141 | ||
3142 | for_each_active_iommu(iommu, drhd) { | |
3143 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3144 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3145 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3146 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 FY |
3147 | } |
3148 | } | |
3149 | ||
134fac3f | 3150 | static int iommu_suspend(void) |
f59c7b69 FY |
3151 | { |
3152 | struct dmar_drhd_unit *drhd; | |
3153 | struct intel_iommu *iommu = NULL; | |
3154 | unsigned long flag; | |
3155 | ||
3156 | for_each_active_iommu(iommu, drhd) { | |
3157 | iommu->iommu_state = kzalloc(sizeof(u32) * MAX_SR_DMAR_REGS, | |
3158 | GFP_ATOMIC); | |
3159 | if (!iommu->iommu_state) | |
3160 | goto nomem; | |
3161 | } | |
3162 | ||
3163 | iommu_flush_all(); | |
3164 | ||
3165 | for_each_active_iommu(iommu, drhd) { | |
3166 | iommu_disable_translation(iommu); | |
3167 | ||
3168 | spin_lock_irqsave(&iommu->register_lock, flag); | |
3169 | ||
3170 | iommu->iommu_state[SR_DMAR_FECTL_REG] = | |
3171 | readl(iommu->reg + DMAR_FECTL_REG); | |
3172 | iommu->iommu_state[SR_DMAR_FEDATA_REG] = | |
3173 | readl(iommu->reg + DMAR_FEDATA_REG); | |
3174 | iommu->iommu_state[SR_DMAR_FEADDR_REG] = | |
3175 | readl(iommu->reg + DMAR_FEADDR_REG); | |
3176 | iommu->iommu_state[SR_DMAR_FEUADDR_REG] = | |
3177 | readl(iommu->reg + DMAR_FEUADDR_REG); | |
3178 | ||
3179 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
3180 | } | |
3181 | return 0; | |
3182 | ||
3183 | nomem: | |
3184 | for_each_active_iommu(iommu, drhd) | |
3185 | kfree(iommu->iommu_state); | |
3186 | ||
3187 | return -ENOMEM; | |
3188 | } | |
3189 | ||
134fac3f | 3190 | static void iommu_resume(void) |
f59c7b69 FY |
3191 | { |
3192 | struct dmar_drhd_unit *drhd; | |
3193 | struct intel_iommu *iommu = NULL; | |
3194 | unsigned long flag; | |
3195 | ||
3196 | if (init_iommu_hw()) { | |
3197 | WARN(1, "IOMMU setup failed, DMAR can not resume!\n"); | |
134fac3f | 3198 | return; |
f59c7b69 FY |
3199 | } |
3200 | ||
3201 | for_each_active_iommu(iommu, drhd) { | |
3202 | ||
3203 | spin_lock_irqsave(&iommu->register_lock, flag); | |
3204 | ||
3205 | writel(iommu->iommu_state[SR_DMAR_FECTL_REG], | |
3206 | iommu->reg + DMAR_FECTL_REG); | |
3207 | writel(iommu->iommu_state[SR_DMAR_FEDATA_REG], | |
3208 | iommu->reg + DMAR_FEDATA_REG); | |
3209 | writel(iommu->iommu_state[SR_DMAR_FEADDR_REG], | |
3210 | iommu->reg + DMAR_FEADDR_REG); | |
3211 | writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], | |
3212 | iommu->reg + DMAR_FEUADDR_REG); | |
3213 | ||
3214 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
3215 | } | |
3216 | ||
3217 | for_each_active_iommu(iommu, drhd) | |
3218 | kfree(iommu->iommu_state); | |
f59c7b69 FY |
3219 | } |
3220 | ||
134fac3f | 3221 | static struct syscore_ops iommu_syscore_ops = { |
f59c7b69 FY |
3222 | .resume = iommu_resume, |
3223 | .suspend = iommu_suspend, | |
3224 | }; | |
3225 | ||
134fac3f | 3226 | static void __init init_iommu_pm_ops(void) |
f59c7b69 | 3227 | { |
134fac3f | 3228 | register_syscore_ops(&iommu_syscore_ops); |
f59c7b69 FY |
3229 | } |
3230 | ||
3231 | #else | |
134fac3f | 3232 | static inline int init_iommu_pm_ops(void) { } |
f59c7b69 FY |
3233 | #endif /* CONFIG_PM */ |
3234 | ||
99dcaded FY |
3235 | /* |
3236 | * Here we only respond to action of unbound device from driver. | |
3237 | * | |
3238 | * Added device is not attached to its DMAR domain here yet. That will happen | |
3239 | * when mapping the device to iova. | |
3240 | */ | |
3241 | static int device_notifier(struct notifier_block *nb, | |
3242 | unsigned long action, void *data) | |
3243 | { | |
3244 | struct device *dev = data; | |
3245 | struct pci_dev *pdev = to_pci_dev(dev); | |
3246 | struct dmar_domain *domain; | |
3247 | ||
44cd613c DW |
3248 | if (iommu_no_mapping(dev)) |
3249 | return 0; | |
3250 | ||
99dcaded FY |
3251 | domain = find_domain(pdev); |
3252 | if (!domain) | |
3253 | return 0; | |
3254 | ||
a97590e5 | 3255 | if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) { |
99dcaded FY |
3256 | domain_remove_one_dev_info(domain, pdev); |
3257 | ||
a97590e5 AW |
3258 | if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && |
3259 | !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && | |
3260 | list_empty(&domain->devices)) | |
3261 | domain_exit(domain); | |
3262 | } | |
3263 | ||
99dcaded FY |
3264 | return 0; |
3265 | } | |
3266 | ||
3267 | static struct notifier_block device_nb = { | |
3268 | .notifier_call = device_notifier, | |
3269 | }; | |
3270 | ||
ba395927 KA |
3271 | int __init intel_iommu_init(void) |
3272 | { | |
3273 | int ret = 0; | |
a59b50e9 | 3274 | int force_on = 0; |
ba395927 | 3275 | |
a59b50e9 JC |
3276 | /* VT-d is required for a TXT/tboot launch, so enforce that */ |
3277 | force_on = tboot_force_iommu(); | |
3278 | ||
3279 | if (dmar_table_init()) { | |
3280 | if (force_on) | |
3281 | panic("tboot: Failed to initialize DMAR table\n"); | |
ba395927 | 3282 | return -ENODEV; |
a59b50e9 | 3283 | } |
ba395927 | 3284 | |
a59b50e9 JC |
3285 | if (dmar_dev_scope_init()) { |
3286 | if (force_on) | |
3287 | panic("tboot: Failed to initialize DMAR device scope\n"); | |
1886e8a9 | 3288 | return -ENODEV; |
a59b50e9 | 3289 | } |
1886e8a9 | 3290 | |
2ae21010 SS |
3291 | /* |
3292 | * Check the need for DMA-remapping initialization now. | |
3293 | * Above initialization will also be used by Interrupt-remapping. | |
3294 | */ | |
75f1cdf1 | 3295 | if (no_iommu || dmar_disabled) |
2ae21010 SS |
3296 | return -ENODEV; |
3297 | ||
51a63e67 JC |
3298 | if (iommu_init_mempool()) { |
3299 | if (force_on) | |
3300 | panic("tboot: Failed to initialize iommu memory\n"); | |
3301 | return -ENODEV; | |
3302 | } | |
3303 | ||
3304 | if (dmar_init_reserved_ranges()) { | |
3305 | if (force_on) | |
3306 | panic("tboot: Failed to reserve iommu ranges\n"); | |
3307 | return -ENODEV; | |
3308 | } | |
ba395927 KA |
3309 | |
3310 | init_no_remapping_devices(); | |
3311 | ||
51a63e67 | 3312 | ret = init_dmars(force_on); |
ba395927 | 3313 | if (ret) { |
a59b50e9 JC |
3314 | if (force_on) |
3315 | panic("tboot: Failed to initialize DMARs\n"); | |
ba395927 KA |
3316 | printk(KERN_ERR "IOMMU: dmar init failed\n"); |
3317 | put_iova_domain(&reserved_iova_list); | |
3318 | iommu_exit_mempool(); | |
3319 | return ret; | |
3320 | } | |
3321 | printk(KERN_INFO | |
3322 | "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); | |
3323 | ||
5e0d2a6f | 3324 | init_timer(&unmap_timer); |
75f1cdf1 FT |
3325 | #ifdef CONFIG_SWIOTLB |
3326 | swiotlb = 0; | |
3327 | #endif | |
19943b0e | 3328 | dma_ops = &intel_dma_ops; |
4ed0d3e6 | 3329 | |
134fac3f | 3330 | init_iommu_pm_ops(); |
a8bcbb0d JR |
3331 | |
3332 | register_iommu(&intel_iommu_ops); | |
3333 | ||
99dcaded FY |
3334 | bus_register_notifier(&pci_bus_type, &device_nb); |
3335 | ||
ba395927 KA |
3336 | return 0; |
3337 | } | |
e820482c | 3338 | |
3199aa6b HW |
3339 | static void iommu_detach_dependent_devices(struct intel_iommu *iommu, |
3340 | struct pci_dev *pdev) | |
3341 | { | |
3342 | struct pci_dev *tmp, *parent; | |
3343 | ||
3344 | if (!iommu || !pdev) | |
3345 | return; | |
3346 | ||
3347 | /* dependent device detach */ | |
3348 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
3349 | /* Secondary interface's bus number and devfn 0 */ | |
3350 | if (tmp) { | |
3351 | parent = pdev->bus->self; | |
3352 | while (parent != tmp) { | |
3353 | iommu_detach_dev(iommu, parent->bus->number, | |
276dbf99 | 3354 | parent->devfn); |
3199aa6b HW |
3355 | parent = parent->bus->self; |
3356 | } | |
45e829ea | 3357 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
3199aa6b HW |
3358 | iommu_detach_dev(iommu, |
3359 | tmp->subordinate->number, 0); | |
3360 | else /* this is a legacy PCI bridge */ | |
276dbf99 DW |
3361 | iommu_detach_dev(iommu, tmp->bus->number, |
3362 | tmp->devfn); | |
3199aa6b HW |
3363 | } |
3364 | } | |
3365 | ||
2c2e2c38 | 3366 | static void domain_remove_one_dev_info(struct dmar_domain *domain, |
c7151a8d WH |
3367 | struct pci_dev *pdev) |
3368 | { | |
3369 | struct device_domain_info *info; | |
3370 | struct intel_iommu *iommu; | |
3371 | unsigned long flags; | |
3372 | int found = 0; | |
3373 | struct list_head *entry, *tmp; | |
3374 | ||
276dbf99 DW |
3375 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3376 | pdev->devfn); | |
c7151a8d WH |
3377 | if (!iommu) |
3378 | return; | |
3379 | ||
3380 | spin_lock_irqsave(&device_domain_lock, flags); | |
3381 | list_for_each_safe(entry, tmp, &domain->devices) { | |
3382 | info = list_entry(entry, struct device_domain_info, link); | |
276dbf99 | 3383 | /* No need to compare PCI domain; it has to be the same */ |
c7151a8d WH |
3384 | if (info->bus == pdev->bus->number && |
3385 | info->devfn == pdev->devfn) { | |
3386 | list_del(&info->link); | |
3387 | list_del(&info->global); | |
3388 | if (info->dev) | |
3389 | info->dev->dev.archdata.iommu = NULL; | |
3390 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
3391 | ||
93a23a72 | 3392 | iommu_disable_dev_iotlb(info); |
c7151a8d | 3393 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3394 | iommu_detach_dependent_devices(iommu, pdev); |
c7151a8d WH |
3395 | free_devinfo_mem(info); |
3396 | ||
3397 | spin_lock_irqsave(&device_domain_lock, flags); | |
3398 | ||
3399 | if (found) | |
3400 | break; | |
3401 | else | |
3402 | continue; | |
3403 | } | |
3404 | ||
3405 | /* if there is no other devices under the same iommu | |
3406 | * owned by this domain, clear this iommu in iommu_bmp | |
3407 | * update iommu count and coherency | |
3408 | */ | |
276dbf99 DW |
3409 | if (iommu == device_to_iommu(info->segment, info->bus, |
3410 | info->devfn)) | |
c7151a8d WH |
3411 | found = 1; |
3412 | } | |
3413 | ||
3414 | if (found == 0) { | |
3415 | unsigned long tmp_flags; | |
3416 | spin_lock_irqsave(&domain->iommu_lock, tmp_flags); | |
3417 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
3418 | domain->iommu_count--; | |
58c610bd | 3419 | domain_update_iommu_cap(domain); |
c7151a8d | 3420 | spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); |
a97590e5 AW |
3421 | |
3422 | spin_lock_irqsave(&iommu->lock, tmp_flags); | |
3423 | clear_bit(domain->id, iommu->domain_ids); | |
3424 | iommu->domains[domain->id] = NULL; | |
3425 | spin_unlock_irqrestore(&iommu->lock, tmp_flags); | |
c7151a8d WH |
3426 | } |
3427 | ||
3428 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
3429 | } | |
3430 | ||
3431 | static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) | |
3432 | { | |
3433 | struct device_domain_info *info; | |
3434 | struct intel_iommu *iommu; | |
3435 | unsigned long flags1, flags2; | |
3436 | ||
3437 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3438 | while (!list_empty(&domain->devices)) { | |
3439 | info = list_entry(domain->devices.next, | |
3440 | struct device_domain_info, link); | |
3441 | list_del(&info->link); | |
3442 | list_del(&info->global); | |
3443 | if (info->dev) | |
3444 | info->dev->dev.archdata.iommu = NULL; | |
3445 | ||
3446 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3447 | ||
93a23a72 | 3448 | iommu_disable_dev_iotlb(info); |
276dbf99 | 3449 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 3450 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3451 | iommu_detach_dependent_devices(iommu, info->dev); |
c7151a8d WH |
3452 | |
3453 | /* clear this iommu in iommu_bmp, update iommu count | |
58c610bd | 3454 | * and capabilities |
c7151a8d WH |
3455 | */ |
3456 | spin_lock_irqsave(&domain->iommu_lock, flags2); | |
3457 | if (test_and_clear_bit(iommu->seq_id, | |
3458 | &domain->iommu_bmp)) { | |
3459 | domain->iommu_count--; | |
58c610bd | 3460 | domain_update_iommu_cap(domain); |
c7151a8d WH |
3461 | } |
3462 | spin_unlock_irqrestore(&domain->iommu_lock, flags2); | |
3463 | ||
3464 | free_devinfo_mem(info); | |
3465 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3466 | } | |
3467 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3468 | } | |
3469 | ||
5e98c4b1 WH |
3470 | /* domain id for virtual machine, it won't be set in context */ |
3471 | static unsigned long vm_domid; | |
3472 | ||
3473 | static struct dmar_domain *iommu_alloc_vm_domain(void) | |
3474 | { | |
3475 | struct dmar_domain *domain; | |
3476 | ||
3477 | domain = alloc_domain_mem(); | |
3478 | if (!domain) | |
3479 | return NULL; | |
3480 | ||
3481 | domain->id = vm_domid++; | |
4c923d47 | 3482 | domain->nid = -1; |
5e98c4b1 WH |
3483 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); |
3484 | domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; | |
3485 | ||
3486 | return domain; | |
3487 | } | |
3488 | ||
2c2e2c38 | 3489 | static int md_domain_init(struct dmar_domain *domain, int guest_width) |
5e98c4b1 WH |
3490 | { |
3491 | int adjust_width; | |
3492 | ||
3493 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); | |
5e98c4b1 WH |
3494 | spin_lock_init(&domain->iommu_lock); |
3495 | ||
3496 | domain_reserve_special_ranges(domain); | |
3497 | ||
3498 | /* calculate AGAW */ | |
3499 | domain->gaw = guest_width; | |
3500 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
3501 | domain->agaw = width_to_agaw(adjust_width); | |
3502 | ||
3503 | INIT_LIST_HEAD(&domain->devices); | |
3504 | ||
3505 | domain->iommu_count = 0; | |
3506 | domain->iommu_coherency = 0; | |
c5b15255 | 3507 | domain->iommu_snooping = 0; |
fe40f1e0 | 3508 | domain->max_addr = 0; |
4c923d47 | 3509 | domain->nid = -1; |
5e98c4b1 WH |
3510 | |
3511 | /* always allocate the top pgd */ | |
4c923d47 | 3512 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
5e98c4b1 WH |
3513 | if (!domain->pgd) |
3514 | return -ENOMEM; | |
3515 | domain_flush_cache(domain, domain->pgd, PAGE_SIZE); | |
3516 | return 0; | |
3517 | } | |
3518 | ||
3519 | static void iommu_free_vm_domain(struct dmar_domain *domain) | |
3520 | { | |
3521 | unsigned long flags; | |
3522 | struct dmar_drhd_unit *drhd; | |
3523 | struct intel_iommu *iommu; | |
3524 | unsigned long i; | |
3525 | unsigned long ndomains; | |
3526 | ||
3527 | for_each_drhd_unit(drhd) { | |
3528 | if (drhd->ignored) | |
3529 | continue; | |
3530 | iommu = drhd->iommu; | |
3531 | ||
3532 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 3533 | for_each_set_bit(i, iommu->domain_ids, ndomains) { |
5e98c4b1 WH |
3534 | if (iommu->domains[i] == domain) { |
3535 | spin_lock_irqsave(&iommu->lock, flags); | |
3536 | clear_bit(i, iommu->domain_ids); | |
3537 | iommu->domains[i] = NULL; | |
3538 | spin_unlock_irqrestore(&iommu->lock, flags); | |
3539 | break; | |
3540 | } | |
5e98c4b1 WH |
3541 | } |
3542 | } | |
3543 | } | |
3544 | ||
3545 | static void vm_domain_exit(struct dmar_domain *domain) | |
3546 | { | |
5e98c4b1 WH |
3547 | /* Domain 0 is reserved, so dont process it */ |
3548 | if (!domain) | |
3549 | return; | |
3550 | ||
3551 | vm_domain_remove_all_dev_info(domain); | |
3552 | /* destroy iovas */ | |
3553 | put_iova_domain(&domain->iovad); | |
5e98c4b1 WH |
3554 | |
3555 | /* clear ptes */ | |
595badf5 | 3556 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3557 | |
3558 | /* free page tables */ | |
d794dc9b | 3559 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3560 | |
3561 | iommu_free_vm_domain(domain); | |
3562 | free_domain_mem(domain); | |
3563 | } | |
3564 | ||
5d450806 | 3565 | static int intel_iommu_domain_init(struct iommu_domain *domain) |
38717946 | 3566 | { |
5d450806 | 3567 | struct dmar_domain *dmar_domain; |
38717946 | 3568 | |
5d450806 JR |
3569 | dmar_domain = iommu_alloc_vm_domain(); |
3570 | if (!dmar_domain) { | |
38717946 | 3571 | printk(KERN_ERR |
5d450806 JR |
3572 | "intel_iommu_domain_init: dmar_domain == NULL\n"); |
3573 | return -ENOMEM; | |
38717946 | 3574 | } |
2c2e2c38 | 3575 | if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
38717946 | 3576 | printk(KERN_ERR |
5d450806 JR |
3577 | "intel_iommu_domain_init() failed\n"); |
3578 | vm_domain_exit(dmar_domain); | |
3579 | return -ENOMEM; | |
38717946 | 3580 | } |
5d450806 | 3581 | domain->priv = dmar_domain; |
faa3d6f5 | 3582 | |
5d450806 | 3583 | return 0; |
38717946 | 3584 | } |
38717946 | 3585 | |
5d450806 | 3586 | static void intel_iommu_domain_destroy(struct iommu_domain *domain) |
38717946 | 3587 | { |
5d450806 JR |
3588 | struct dmar_domain *dmar_domain = domain->priv; |
3589 | ||
3590 | domain->priv = NULL; | |
3591 | vm_domain_exit(dmar_domain); | |
38717946 | 3592 | } |
38717946 | 3593 | |
4c5478c9 JR |
3594 | static int intel_iommu_attach_device(struct iommu_domain *domain, |
3595 | struct device *dev) | |
38717946 | 3596 | { |
4c5478c9 JR |
3597 | struct dmar_domain *dmar_domain = domain->priv; |
3598 | struct pci_dev *pdev = to_pci_dev(dev); | |
fe40f1e0 WH |
3599 | struct intel_iommu *iommu; |
3600 | int addr_width; | |
faa3d6f5 WH |
3601 | |
3602 | /* normally pdev is not mapped */ | |
3603 | if (unlikely(domain_context_mapped(pdev))) { | |
3604 | struct dmar_domain *old_domain; | |
3605 | ||
3606 | old_domain = find_domain(pdev); | |
3607 | if (old_domain) { | |
2c2e2c38 FY |
3608 | if (dmar_domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
3609 | dmar_domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) | |
3610 | domain_remove_one_dev_info(old_domain, pdev); | |
faa3d6f5 WH |
3611 | else |
3612 | domain_remove_dev_info(old_domain); | |
3613 | } | |
3614 | } | |
3615 | ||
276dbf99 DW |
3616 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3617 | pdev->devfn); | |
fe40f1e0 WH |
3618 | if (!iommu) |
3619 | return -ENODEV; | |
3620 | ||
3621 | /* check if this iommu agaw is sufficient for max mapped address */ | |
3622 | addr_width = agaw_to_width(iommu->agaw); | |
a99c47a2 TL |
3623 | if (addr_width > cap_mgaw(iommu->cap)) |
3624 | addr_width = cap_mgaw(iommu->cap); | |
3625 | ||
3626 | if (dmar_domain->max_addr > (1LL << addr_width)) { | |
3627 | printk(KERN_ERR "%s: iommu width (%d) is not " | |
fe40f1e0 | 3628 | "sufficient for the mapped address (%llx)\n", |
a99c47a2 | 3629 | __func__, addr_width, dmar_domain->max_addr); |
fe40f1e0 WH |
3630 | return -EFAULT; |
3631 | } | |
a99c47a2 TL |
3632 | dmar_domain->gaw = addr_width; |
3633 | ||
3634 | /* | |
3635 | * Knock out extra levels of page tables if necessary | |
3636 | */ | |
3637 | while (iommu->agaw < dmar_domain->agaw) { | |
3638 | struct dma_pte *pte; | |
3639 | ||
3640 | pte = dmar_domain->pgd; | |
3641 | if (dma_pte_present(pte)) { | |
25cbff16 SY |
3642 | dmar_domain->pgd = (struct dma_pte *) |
3643 | phys_to_virt(dma_pte_addr(pte)); | |
7a661013 | 3644 | free_pgtable_page(pte); |
a99c47a2 TL |
3645 | } |
3646 | dmar_domain->agaw--; | |
3647 | } | |
fe40f1e0 | 3648 | |
5fe60f4e | 3649 | return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
38717946 | 3650 | } |
38717946 | 3651 | |
4c5478c9 JR |
3652 | static void intel_iommu_detach_device(struct iommu_domain *domain, |
3653 | struct device *dev) | |
38717946 | 3654 | { |
4c5478c9 JR |
3655 | struct dmar_domain *dmar_domain = domain->priv; |
3656 | struct pci_dev *pdev = to_pci_dev(dev); | |
3657 | ||
2c2e2c38 | 3658 | domain_remove_one_dev_info(dmar_domain, pdev); |
faa3d6f5 | 3659 | } |
c7151a8d | 3660 | |
b146a1c9 JR |
3661 | static int intel_iommu_map(struct iommu_domain *domain, |
3662 | unsigned long iova, phys_addr_t hpa, | |
3663 | int gfp_order, int iommu_prot) | |
faa3d6f5 | 3664 | { |
dde57a21 | 3665 | struct dmar_domain *dmar_domain = domain->priv; |
fe40f1e0 | 3666 | u64 max_addr; |
dde57a21 | 3667 | int prot = 0; |
b146a1c9 | 3668 | size_t size; |
faa3d6f5 | 3669 | int ret; |
fe40f1e0 | 3670 | |
dde57a21 JR |
3671 | if (iommu_prot & IOMMU_READ) |
3672 | prot |= DMA_PTE_READ; | |
3673 | if (iommu_prot & IOMMU_WRITE) | |
3674 | prot |= DMA_PTE_WRITE; | |
9cf06697 SY |
3675 | if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) |
3676 | prot |= DMA_PTE_SNP; | |
dde57a21 | 3677 | |
b146a1c9 | 3678 | size = PAGE_SIZE << gfp_order; |
163cc52c | 3679 | max_addr = iova + size; |
dde57a21 | 3680 | if (dmar_domain->max_addr < max_addr) { |
fe40f1e0 WH |
3681 | u64 end; |
3682 | ||
3683 | /* check if minimum agaw is sufficient for mapped address */ | |
8954da1f | 3684 | end = __DOMAIN_MAX_ADDR(dmar_domain->gaw) + 1; |
fe40f1e0 | 3685 | if (end < max_addr) { |
8954da1f | 3686 | printk(KERN_ERR "%s: iommu width (%d) is not " |
fe40f1e0 | 3687 | "sufficient for the mapped address (%llx)\n", |
8954da1f | 3688 | __func__, dmar_domain->gaw, max_addr); |
fe40f1e0 WH |
3689 | return -EFAULT; |
3690 | } | |
dde57a21 | 3691 | dmar_domain->max_addr = max_addr; |
fe40f1e0 | 3692 | } |
ad051221 DW |
3693 | /* Round up size to next multiple of PAGE_SIZE, if it and |
3694 | the low bits of hpa would take us onto the next page */ | |
88cb6a74 | 3695 | size = aligned_nrpages(hpa, size); |
ad051221 DW |
3696 | ret = domain_pfn_mapping(dmar_domain, iova >> VTD_PAGE_SHIFT, |
3697 | hpa >> VTD_PAGE_SHIFT, size, prot); | |
faa3d6f5 | 3698 | return ret; |
38717946 | 3699 | } |
38717946 | 3700 | |
b146a1c9 JR |
3701 | static int intel_iommu_unmap(struct iommu_domain *domain, |
3702 | unsigned long iova, int gfp_order) | |
38717946 | 3703 | { |
dde57a21 | 3704 | struct dmar_domain *dmar_domain = domain->priv; |
b146a1c9 | 3705 | size_t size = PAGE_SIZE << gfp_order; |
4b99d352 | 3706 | |
163cc52c DW |
3707 | dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, |
3708 | (iova + size - 1) >> VTD_PAGE_SHIFT); | |
fe40f1e0 | 3709 | |
163cc52c DW |
3710 | if (dmar_domain->max_addr == iova + size) |
3711 | dmar_domain->max_addr = iova; | |
b146a1c9 JR |
3712 | |
3713 | return gfp_order; | |
38717946 | 3714 | } |
38717946 | 3715 | |
d14d6577 JR |
3716 | static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, |
3717 | unsigned long iova) | |
38717946 | 3718 | { |
d14d6577 | 3719 | struct dmar_domain *dmar_domain = domain->priv; |
38717946 | 3720 | struct dma_pte *pte; |
faa3d6f5 | 3721 | u64 phys = 0; |
38717946 | 3722 | |
b026fd28 | 3723 | pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT); |
38717946 | 3724 | if (pte) |
faa3d6f5 | 3725 | phys = dma_pte_addr(pte); |
38717946 | 3726 | |
faa3d6f5 | 3727 | return phys; |
38717946 | 3728 | } |
a8bcbb0d | 3729 | |
dbb9fd86 SY |
3730 | static int intel_iommu_domain_has_cap(struct iommu_domain *domain, |
3731 | unsigned long cap) | |
3732 | { | |
3733 | struct dmar_domain *dmar_domain = domain->priv; | |
3734 | ||
3735 | if (cap == IOMMU_CAP_CACHE_COHERENCY) | |
3736 | return dmar_domain->iommu_snooping; | |
323f99cb TL |
3737 | if (cap == IOMMU_CAP_INTR_REMAP) |
3738 | return intr_remapping_enabled; | |
dbb9fd86 SY |
3739 | |
3740 | return 0; | |
3741 | } | |
3742 | ||
a8bcbb0d JR |
3743 | static struct iommu_ops intel_iommu_ops = { |
3744 | .domain_init = intel_iommu_domain_init, | |
3745 | .domain_destroy = intel_iommu_domain_destroy, | |
3746 | .attach_dev = intel_iommu_attach_device, | |
3747 | .detach_dev = intel_iommu_detach_device, | |
b146a1c9 JR |
3748 | .map = intel_iommu_map, |
3749 | .unmap = intel_iommu_unmap, | |
a8bcbb0d | 3750 | .iova_to_phys = intel_iommu_iova_to_phys, |
dbb9fd86 | 3751 | .domain_has_cap = intel_iommu_domain_has_cap, |
a8bcbb0d | 3752 | }; |
9af88143 DW |
3753 | |
3754 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) | |
3755 | { | |
3756 | /* | |
3757 | * Mobile 4 Series Chipset neglects to set RWBF capability, | |
3758 | * but needs it: | |
3759 | */ | |
3760 | printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); | |
3761 | rwbf_quirk = 1; | |
2d9e667e DW |
3762 | |
3763 | /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */ | |
3764 | if (dev->revision == 0x07) { | |
3765 | printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n"); | |
3766 | dmar_map_gfx = 0; | |
3767 | } | |
9af88143 DW |
3768 | } |
3769 | ||
3770 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); | |
e0fc7e0b | 3771 | |
eecfd57f AJ |
3772 | #define GGC 0x52 |
3773 | #define GGC_MEMORY_SIZE_MASK (0xf << 8) | |
3774 | #define GGC_MEMORY_SIZE_NONE (0x0 << 8) | |
3775 | #define GGC_MEMORY_SIZE_1M (0x1 << 8) | |
3776 | #define GGC_MEMORY_SIZE_2M (0x3 << 8) | |
3777 | #define GGC_MEMORY_VT_ENABLED (0x8 << 8) | |
3778 | #define GGC_MEMORY_SIZE_2M_VT (0x9 << 8) | |
3779 | #define GGC_MEMORY_SIZE_3M_VT (0xa << 8) | |
3780 | #define GGC_MEMORY_SIZE_4M_VT (0xb << 8) | |
3781 | ||
9eecabcb DW |
3782 | static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev) |
3783 | { | |
3784 | unsigned short ggc; | |
3785 | ||
eecfd57f | 3786 | if (pci_read_config_word(dev, GGC, &ggc)) |
9eecabcb DW |
3787 | return; |
3788 | ||
eecfd57f | 3789 | if (!(ggc & GGC_MEMORY_VT_ENABLED)) { |
9eecabcb DW |
3790 | printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n"); |
3791 | dmar_map_gfx = 0; | |
3792 | } | |
3793 | } | |
3794 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt); | |
3795 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt); | |
3796 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0062, quirk_calpella_no_shadow_gtt); | |
3797 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x006a, quirk_calpella_no_shadow_gtt); | |
3798 | ||
e0fc7e0b DW |
3799 | /* On Tylersburg chipsets, some BIOSes have been known to enable the |
3800 | ISOCH DMAR unit for the Azalia sound device, but not give it any | |
3801 | TLB entries, which causes it to deadlock. Check for that. We do | |
3802 | this in a function called from init_dmars(), instead of in a PCI | |
3803 | quirk, because we don't want to print the obnoxious "BIOS broken" | |
3804 | message if VT-d is actually disabled. | |
3805 | */ | |
3806 | static void __init check_tylersburg_isoch(void) | |
3807 | { | |
3808 | struct pci_dev *pdev; | |
3809 | uint32_t vtisochctrl; | |
3810 | ||
3811 | /* If there's no Azalia in the system anyway, forget it. */ | |
3812 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x3a3e, NULL); | |
3813 | if (!pdev) | |
3814 | return; | |
3815 | pci_dev_put(pdev); | |
3816 | ||
3817 | /* System Management Registers. Might be hidden, in which case | |
3818 | we can't do the sanity check. But that's OK, because the | |
3819 | known-broken BIOSes _don't_ actually hide it, so far. */ | |
3820 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x342e, NULL); | |
3821 | if (!pdev) | |
3822 | return; | |
3823 | ||
3824 | if (pci_read_config_dword(pdev, 0x188, &vtisochctrl)) { | |
3825 | pci_dev_put(pdev); | |
3826 | return; | |
3827 | } | |
3828 | ||
3829 | pci_dev_put(pdev); | |
3830 | ||
3831 | /* If Azalia DMA is routed to the non-isoch DMAR unit, fine. */ | |
3832 | if (vtisochctrl & 1) | |
3833 | return; | |
3834 | ||
3835 | /* Drop all bits other than the number of TLB entries */ | |
3836 | vtisochctrl &= 0x1c; | |
3837 | ||
3838 | /* If we have the recommended number of TLB entries (16), fine. */ | |
3839 | if (vtisochctrl == 0x10) | |
3840 | return; | |
3841 | ||
3842 | /* Zero TLB entries? You get to ride the short bus to school. */ | |
3843 | if (!vtisochctrl) { | |
3844 | WARN(1, "Your BIOS is broken; DMA routed to ISOCH DMAR unit but no TLB space.\n" | |
3845 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
3846 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
3847 | dmi_get_system_info(DMI_BIOS_VERSION), | |
3848 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
3849 | iommu_identity_mapping |= IDENTMAP_AZALIA; | |
3850 | return; | |
3851 | } | |
3852 | ||
3853 | printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", | |
3854 | vtisochctrl); | |
3855 | } |