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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> |
f59c7b69 | 39 | #include <linux/sysdev.h> |
adb2fe02 | 40 | #include <linux/dmi.h> |
ba395927 | 41 | #include <asm/cacheflush.h> |
46a7fa27 | 42 | #include <asm/iommu.h> |
ba395927 KA |
43 | #include "pci.h" |
44 | ||
5b6985ce FY |
45 | #define ROOT_SIZE VTD_PAGE_SIZE |
46 | #define CONTEXT_SIZE VTD_PAGE_SIZE | |
47 | ||
ba395927 KA |
48 | #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) |
49 | #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) | |
50 | ||
51 | #define IOAPIC_RANGE_START (0xfee00000) | |
52 | #define IOAPIC_RANGE_END (0xfeefffff) | |
53 | #define IOVA_START_ADDR (0x1000) | |
54 | ||
55 | #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 | |
56 | ||
4ed0d3e6 FY |
57 | #define MAX_AGAW_WIDTH 64 |
58 | ||
2ebe3151 DW |
59 | #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) |
60 | #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) | |
61 | ||
62 | /* We limit DOMAIN_MAX_PFN to fit in an unsigned long, and DOMAIN_MAX_ADDR | |
63 | to match. That way, we can use 'unsigned long' for PFNs with impunity. */ | |
64 | #define DOMAIN_MAX_PFN(gaw) ((unsigned long) min_t(uint64_t, \ | |
65 | __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) | |
66 | #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) | |
ba395927 | 67 | |
f27be03b | 68 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
284901a9 | 69 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
6a35528a | 70 | #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) |
5e0d2a6f | 71 | |
fd18de50 | 72 | |
dd4e8319 DW |
73 | /* VT-d pages must always be _smaller_ than MM pages. Otherwise things |
74 | are never going to work. */ | |
75 | static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) | |
76 | { | |
77 | return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
78 | } | |
79 | ||
80 | static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn) | |
81 | { | |
82 | return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
83 | } | |
84 | static inline unsigned long page_to_dma_pfn(struct page *pg) | |
85 | { | |
86 | return mm_to_dma_pfn(page_to_pfn(pg)); | |
87 | } | |
88 | static inline unsigned long virt_to_dma_pfn(void *p) | |
89 | { | |
90 | return page_to_dma_pfn(virt_to_page(p)); | |
91 | } | |
92 | ||
d9630fe9 WH |
93 | /* global iommu list, set NULL for ignored DMAR units */ |
94 | static struct intel_iommu **g_iommus; | |
95 | ||
9af88143 DW |
96 | static int rwbf_quirk; |
97 | ||
46b08e1a MM |
98 | /* |
99 | * 0: Present | |
100 | * 1-11: Reserved | |
101 | * 12-63: Context Ptr (12 - (haw-1)) | |
102 | * 64-127: Reserved | |
103 | */ | |
104 | struct root_entry { | |
105 | u64 val; | |
106 | u64 rsvd1; | |
107 | }; | |
108 | #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) | |
109 | static inline bool root_present(struct root_entry *root) | |
110 | { | |
111 | return (root->val & 1); | |
112 | } | |
113 | static inline void set_root_present(struct root_entry *root) | |
114 | { | |
115 | root->val |= 1; | |
116 | } | |
117 | static inline void set_root_value(struct root_entry *root, unsigned long value) | |
118 | { | |
119 | root->val |= value & VTD_PAGE_MASK; | |
120 | } | |
121 | ||
122 | static inline struct context_entry * | |
123 | get_context_addr_from_root(struct root_entry *root) | |
124 | { | |
125 | return (struct context_entry *) | |
126 | (root_present(root)?phys_to_virt( | |
127 | root->val & VTD_PAGE_MASK) : | |
128 | NULL); | |
129 | } | |
130 | ||
7a8fc25e MM |
131 | /* |
132 | * low 64 bits: | |
133 | * 0: present | |
134 | * 1: fault processing disable | |
135 | * 2-3: translation type | |
136 | * 12-63: address space root | |
137 | * high 64 bits: | |
138 | * 0-2: address width | |
139 | * 3-6: aval | |
140 | * 8-23: domain id | |
141 | */ | |
142 | struct context_entry { | |
143 | u64 lo; | |
144 | u64 hi; | |
145 | }; | |
c07e7d21 MM |
146 | |
147 | static inline bool context_present(struct context_entry *context) | |
148 | { | |
149 | return (context->lo & 1); | |
150 | } | |
151 | static inline void context_set_present(struct context_entry *context) | |
152 | { | |
153 | context->lo |= 1; | |
154 | } | |
155 | ||
156 | static inline void context_set_fault_enable(struct context_entry *context) | |
157 | { | |
158 | context->lo &= (((u64)-1) << 2) | 1; | |
159 | } | |
160 | ||
c07e7d21 MM |
161 | static inline void context_set_translation_type(struct context_entry *context, |
162 | unsigned long value) | |
163 | { | |
164 | context->lo &= (((u64)-1) << 4) | 3; | |
165 | context->lo |= (value & 3) << 2; | |
166 | } | |
167 | ||
168 | static inline void context_set_address_root(struct context_entry *context, | |
169 | unsigned long value) | |
170 | { | |
171 | context->lo |= value & VTD_PAGE_MASK; | |
172 | } | |
173 | ||
174 | static inline void context_set_address_width(struct context_entry *context, | |
175 | unsigned long value) | |
176 | { | |
177 | context->hi |= value & 7; | |
178 | } | |
179 | ||
180 | static inline void context_set_domain_id(struct context_entry *context, | |
181 | unsigned long value) | |
182 | { | |
183 | context->hi |= (value & ((1 << 16) - 1)) << 8; | |
184 | } | |
185 | ||
186 | static inline void context_clear_entry(struct context_entry *context) | |
187 | { | |
188 | context->lo = 0; | |
189 | context->hi = 0; | |
190 | } | |
7a8fc25e | 191 | |
622ba12a MM |
192 | /* |
193 | * 0: readable | |
194 | * 1: writable | |
195 | * 2-6: reserved | |
196 | * 7: super page | |
9cf06697 SY |
197 | * 8-10: available |
198 | * 11: snoop behavior | |
622ba12a MM |
199 | * 12-63: Host physcial address |
200 | */ | |
201 | struct dma_pte { | |
202 | u64 val; | |
203 | }; | |
622ba12a | 204 | |
19c239ce MM |
205 | static inline void dma_clear_pte(struct dma_pte *pte) |
206 | { | |
207 | pte->val = 0; | |
208 | } | |
209 | ||
210 | static inline void dma_set_pte_readable(struct dma_pte *pte) | |
211 | { | |
212 | pte->val |= DMA_PTE_READ; | |
213 | } | |
214 | ||
215 | static inline void dma_set_pte_writable(struct dma_pte *pte) | |
216 | { | |
217 | pte->val |= DMA_PTE_WRITE; | |
218 | } | |
219 | ||
9cf06697 SY |
220 | static inline void dma_set_pte_snp(struct dma_pte *pte) |
221 | { | |
222 | pte->val |= DMA_PTE_SNP; | |
223 | } | |
224 | ||
19c239ce MM |
225 | static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) |
226 | { | |
227 | pte->val = (pte->val & ~3) | (prot & 3); | |
228 | } | |
229 | ||
230 | static inline u64 dma_pte_addr(struct dma_pte *pte) | |
231 | { | |
c85994e4 DW |
232 | #ifdef CONFIG_64BIT |
233 | return pte->val & VTD_PAGE_MASK; | |
234 | #else | |
235 | /* Must have a full atomic 64-bit read */ | |
236 | return __cmpxchg64(pte, 0ULL, 0ULL) & VTD_PAGE_MASK; | |
237 | #endif | |
19c239ce MM |
238 | } |
239 | ||
dd4e8319 | 240 | static inline void dma_set_pte_pfn(struct dma_pte *pte, unsigned long pfn) |
19c239ce | 241 | { |
dd4e8319 | 242 | pte->val |= (uint64_t)pfn << VTD_PAGE_SHIFT; |
19c239ce MM |
243 | } |
244 | ||
245 | static inline bool dma_pte_present(struct dma_pte *pte) | |
246 | { | |
247 | return (pte->val & 3) != 0; | |
248 | } | |
622ba12a | 249 | |
75e6bf96 DW |
250 | static inline int first_pte_in_page(struct dma_pte *pte) |
251 | { | |
252 | return !((unsigned long)pte & ~VTD_PAGE_MASK); | |
253 | } | |
254 | ||
2c2e2c38 FY |
255 | /* |
256 | * This domain is a statically identity mapping domain. | |
257 | * 1. This domain creats a static 1:1 mapping to all usable memory. | |
258 | * 2. It maps to each iommu if successful. | |
259 | * 3. Each iommu mapps to this domain if successful. | |
260 | */ | |
19943b0e DW |
261 | static struct dmar_domain *si_domain; |
262 | static int hw_pass_through = 1; | |
2c2e2c38 | 263 | |
3b5410e7 | 264 | /* devices under the same p2p bridge are owned in one domain */ |
cdc7b837 | 265 | #define DOMAIN_FLAG_P2P_MULTIPLE_DEVICES (1 << 0) |
3b5410e7 | 266 | |
1ce28feb WH |
267 | /* domain represents a virtual machine, more than one devices |
268 | * across iommus may be owned in one domain, e.g. kvm guest. | |
269 | */ | |
270 | #define DOMAIN_FLAG_VIRTUAL_MACHINE (1 << 1) | |
271 | ||
2c2e2c38 FY |
272 | /* si_domain contains mulitple devices */ |
273 | #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2) | |
274 | ||
99126f7c MM |
275 | struct dmar_domain { |
276 | int id; /* domain id */ | |
8c11e798 | 277 | unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/ |
99126f7c MM |
278 | |
279 | struct list_head devices; /* all devices' list */ | |
280 | struct iova_domain iovad; /* iova's that belong to this domain */ | |
281 | ||
282 | struct dma_pte *pgd; /* virtual address */ | |
99126f7c MM |
283 | int gaw; /* max guest address width */ |
284 | ||
285 | /* adjusted guest address width, 0 is level 2 30-bit */ | |
286 | int agaw; | |
287 | ||
3b5410e7 | 288 | int flags; /* flags to find out type of domain */ |
8e604097 WH |
289 | |
290 | int iommu_coherency;/* indicate coherency of iommu access */ | |
58c610bd | 291 | int iommu_snooping; /* indicate snooping control feature*/ |
c7151a8d WH |
292 | int iommu_count; /* reference count of iommu */ |
293 | spinlock_t iommu_lock; /* protect iommu set in domain */ | |
fe40f1e0 | 294 | u64 max_addr; /* maximum mapped address */ |
99126f7c MM |
295 | }; |
296 | ||
a647dacb MM |
297 | /* PCI domain-device relationship */ |
298 | struct device_domain_info { | |
299 | struct list_head link; /* link to domain siblings */ | |
300 | struct list_head global; /* link to global list */ | |
276dbf99 DW |
301 | int segment; /* PCI domain */ |
302 | u8 bus; /* PCI bus number */ | |
a647dacb MM |
303 | u8 devfn; /* PCI devfn number */ |
304 | struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */ | |
93a23a72 | 305 | struct intel_iommu *iommu; /* IOMMU used by this device */ |
a647dacb MM |
306 | struct dmar_domain *domain; /* pointer to domain */ |
307 | }; | |
308 | ||
5e0d2a6f | 309 | static void flush_unmaps_timeout(unsigned long data); |
310 | ||
311 | DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); | |
312 | ||
80b20dd8 | 313 | #define HIGH_WATER_MARK 250 |
314 | struct deferred_flush_tables { | |
315 | int next; | |
316 | struct iova *iova[HIGH_WATER_MARK]; | |
317 | struct dmar_domain *domain[HIGH_WATER_MARK]; | |
318 | }; | |
319 | ||
320 | static struct deferred_flush_tables *deferred_flush; | |
321 | ||
5e0d2a6f | 322 | /* bitmap for indexing intel_iommus */ |
5e0d2a6f | 323 | static int g_num_of_iommus; |
324 | ||
325 | static DEFINE_SPINLOCK(async_umap_flush_lock); | |
326 | static LIST_HEAD(unmaps_to_do); | |
327 | ||
328 | static int timer_on; | |
329 | static long list_size; | |
5e0d2a6f | 330 | |
ba395927 KA |
331 | static void domain_remove_dev_info(struct dmar_domain *domain); |
332 | ||
0cd5c3c8 KM |
333 | #ifdef CONFIG_DMAR_DEFAULT_ON |
334 | int dmar_disabled = 0; | |
335 | #else | |
336 | int dmar_disabled = 1; | |
337 | #endif /*CONFIG_DMAR_DEFAULT_ON*/ | |
338 | ||
ba395927 | 339 | static int __initdata dmar_map_gfx = 1; |
7d3b03ce | 340 | static int dmar_forcedac; |
5e0d2a6f | 341 | static int intel_iommu_strict; |
ba395927 KA |
342 | |
343 | #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1)) | |
344 | static DEFINE_SPINLOCK(device_domain_lock); | |
345 | static LIST_HEAD(device_domain_list); | |
346 | ||
a8bcbb0d JR |
347 | static struct iommu_ops intel_iommu_ops; |
348 | ||
ba395927 KA |
349 | static int __init intel_iommu_setup(char *str) |
350 | { | |
351 | if (!str) | |
352 | return -EINVAL; | |
353 | while (*str) { | |
0cd5c3c8 KM |
354 | if (!strncmp(str, "on", 2)) { |
355 | dmar_disabled = 0; | |
356 | printk(KERN_INFO "Intel-IOMMU: enabled\n"); | |
357 | } else if (!strncmp(str, "off", 3)) { | |
ba395927 | 358 | dmar_disabled = 1; |
0cd5c3c8 | 359 | printk(KERN_INFO "Intel-IOMMU: disabled\n"); |
ba395927 KA |
360 | } else if (!strncmp(str, "igfx_off", 8)) { |
361 | dmar_map_gfx = 0; | |
362 | printk(KERN_INFO | |
363 | "Intel-IOMMU: disable GFX device mapping\n"); | |
7d3b03ce | 364 | } else if (!strncmp(str, "forcedac", 8)) { |
5e0d2a6f | 365 | printk(KERN_INFO |
7d3b03ce KA |
366 | "Intel-IOMMU: Forcing DAC for PCI devices\n"); |
367 | dmar_forcedac = 1; | |
5e0d2a6f | 368 | } else if (!strncmp(str, "strict", 6)) { |
369 | printk(KERN_INFO | |
370 | "Intel-IOMMU: disable batched IOTLB flush\n"); | |
371 | intel_iommu_strict = 1; | |
ba395927 KA |
372 | } |
373 | ||
374 | str += strcspn(str, ","); | |
375 | while (*str == ',') | |
376 | str++; | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | __setup("intel_iommu=", intel_iommu_setup); | |
381 | ||
382 | static struct kmem_cache *iommu_domain_cache; | |
383 | static struct kmem_cache *iommu_devinfo_cache; | |
384 | static struct kmem_cache *iommu_iova_cache; | |
385 | ||
eb3fa7cb KA |
386 | static inline void *iommu_kmem_cache_alloc(struct kmem_cache *cachep) |
387 | { | |
388 | unsigned int flags; | |
389 | void *vaddr; | |
390 | ||
391 | /* trying to avoid low memory issues */ | |
392 | flags = current->flags & PF_MEMALLOC; | |
393 | current->flags |= PF_MEMALLOC; | |
394 | vaddr = kmem_cache_alloc(cachep, GFP_ATOMIC); | |
395 | current->flags &= (~PF_MEMALLOC | flags); | |
396 | return vaddr; | |
397 | } | |
398 | ||
399 | ||
ba395927 KA |
400 | static inline void *alloc_pgtable_page(void) |
401 | { | |
eb3fa7cb KA |
402 | unsigned int flags; |
403 | void *vaddr; | |
404 | ||
405 | /* trying to avoid low memory issues */ | |
406 | flags = current->flags & PF_MEMALLOC; | |
407 | current->flags |= PF_MEMALLOC; | |
408 | vaddr = (void *)get_zeroed_page(GFP_ATOMIC); | |
409 | current->flags &= (~PF_MEMALLOC | flags); | |
410 | return vaddr; | |
ba395927 KA |
411 | } |
412 | ||
413 | static inline void free_pgtable_page(void *vaddr) | |
414 | { | |
415 | free_page((unsigned long)vaddr); | |
416 | } | |
417 | ||
418 | static inline void *alloc_domain_mem(void) | |
419 | { | |
eb3fa7cb | 420 | return iommu_kmem_cache_alloc(iommu_domain_cache); |
ba395927 KA |
421 | } |
422 | ||
38717946 | 423 | static void free_domain_mem(void *vaddr) |
ba395927 KA |
424 | { |
425 | kmem_cache_free(iommu_domain_cache, vaddr); | |
426 | } | |
427 | ||
428 | static inline void * alloc_devinfo_mem(void) | |
429 | { | |
eb3fa7cb | 430 | return iommu_kmem_cache_alloc(iommu_devinfo_cache); |
ba395927 KA |
431 | } |
432 | ||
433 | static inline void free_devinfo_mem(void *vaddr) | |
434 | { | |
435 | kmem_cache_free(iommu_devinfo_cache, vaddr); | |
436 | } | |
437 | ||
438 | struct iova *alloc_iova_mem(void) | |
439 | { | |
eb3fa7cb | 440 | return iommu_kmem_cache_alloc(iommu_iova_cache); |
ba395927 KA |
441 | } |
442 | ||
443 | void free_iova_mem(struct iova *iova) | |
444 | { | |
445 | kmem_cache_free(iommu_iova_cache, iova); | |
446 | } | |
447 | ||
1b573683 WH |
448 | |
449 | static inline int width_to_agaw(int width); | |
450 | ||
4ed0d3e6 | 451 | static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) |
1b573683 WH |
452 | { |
453 | unsigned long sagaw; | |
454 | int agaw = -1; | |
455 | ||
456 | sagaw = cap_sagaw(iommu->cap); | |
4ed0d3e6 | 457 | for (agaw = width_to_agaw(max_gaw); |
1b573683 WH |
458 | agaw >= 0; agaw--) { |
459 | if (test_bit(agaw, &sagaw)) | |
460 | break; | |
461 | } | |
462 | ||
463 | return agaw; | |
464 | } | |
465 | ||
4ed0d3e6 FY |
466 | /* |
467 | * Calculate max SAGAW for each iommu. | |
468 | */ | |
469 | int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
470 | { | |
471 | return __iommu_calculate_agaw(iommu, MAX_AGAW_WIDTH); | |
472 | } | |
473 | ||
474 | /* | |
475 | * calculate agaw for each iommu. | |
476 | * "SAGAW" may be different across iommus, use a default agaw, and | |
477 | * get a supported less agaw for iommus that don't support the default agaw. | |
478 | */ | |
479 | int iommu_calculate_agaw(struct intel_iommu *iommu) | |
480 | { | |
481 | return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
482 | } | |
483 | ||
2c2e2c38 | 484 | /* This functionin only returns single iommu in a domain */ |
8c11e798 WH |
485 | static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) |
486 | { | |
487 | int iommu_id; | |
488 | ||
2c2e2c38 | 489 | /* si_domain and vm domain should not get here. */ |
1ce28feb | 490 | BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE); |
2c2e2c38 | 491 | BUG_ON(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY); |
1ce28feb | 492 | |
8c11e798 WH |
493 | iommu_id = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); |
494 | if (iommu_id < 0 || iommu_id >= g_num_of_iommus) | |
495 | return NULL; | |
496 | ||
497 | return g_iommus[iommu_id]; | |
498 | } | |
499 | ||
8e604097 WH |
500 | static void domain_update_iommu_coherency(struct dmar_domain *domain) |
501 | { | |
502 | int i; | |
503 | ||
504 | domain->iommu_coherency = 1; | |
505 | ||
506 | i = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); | |
507 | for (; i < g_num_of_iommus; ) { | |
508 | if (!ecap_coherent(g_iommus[i]->ecap)) { | |
509 | domain->iommu_coherency = 0; | |
510 | break; | |
511 | } | |
512 | i = find_next_bit(&domain->iommu_bmp, g_num_of_iommus, i+1); | |
513 | } | |
514 | } | |
515 | ||
58c610bd SY |
516 | static void domain_update_iommu_snooping(struct dmar_domain *domain) |
517 | { | |
518 | int i; | |
519 | ||
520 | domain->iommu_snooping = 1; | |
521 | ||
522 | i = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); | |
523 | for (; i < g_num_of_iommus; ) { | |
524 | if (!ecap_sc_support(g_iommus[i]->ecap)) { | |
525 | domain->iommu_snooping = 0; | |
526 | break; | |
527 | } | |
528 | i = find_next_bit(&domain->iommu_bmp, g_num_of_iommus, i+1); | |
529 | } | |
530 | } | |
531 | ||
532 | /* Some capabilities may be different across iommus */ | |
533 | static void domain_update_iommu_cap(struct dmar_domain *domain) | |
534 | { | |
535 | domain_update_iommu_coherency(domain); | |
536 | domain_update_iommu_snooping(domain); | |
537 | } | |
538 | ||
276dbf99 | 539 | static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) |
c7151a8d WH |
540 | { |
541 | struct dmar_drhd_unit *drhd = NULL; | |
542 | int i; | |
543 | ||
544 | for_each_drhd_unit(drhd) { | |
545 | if (drhd->ignored) | |
546 | continue; | |
276dbf99 DW |
547 | if (segment != drhd->segment) |
548 | continue; | |
c7151a8d | 549 | |
924b6231 | 550 | for (i = 0; i < drhd->devices_cnt; i++) { |
288e4877 DH |
551 | if (drhd->devices[i] && |
552 | drhd->devices[i]->bus->number == bus && | |
c7151a8d WH |
553 | drhd->devices[i]->devfn == devfn) |
554 | return drhd->iommu; | |
4958c5dc DW |
555 | if (drhd->devices[i] && |
556 | drhd->devices[i]->subordinate && | |
924b6231 DW |
557 | drhd->devices[i]->subordinate->number <= bus && |
558 | drhd->devices[i]->subordinate->subordinate >= bus) | |
559 | return drhd->iommu; | |
560 | } | |
c7151a8d WH |
561 | |
562 | if (drhd->include_all) | |
563 | return drhd->iommu; | |
564 | } | |
565 | ||
566 | return NULL; | |
567 | } | |
568 | ||
5331fe6f WH |
569 | static void domain_flush_cache(struct dmar_domain *domain, |
570 | void *addr, int size) | |
571 | { | |
572 | if (!domain->iommu_coherency) | |
573 | clflush_cache_range(addr, size); | |
574 | } | |
575 | ||
ba395927 KA |
576 | /* Gets context entry for a given bus and devfn */ |
577 | static struct context_entry * device_to_context_entry(struct intel_iommu *iommu, | |
578 | u8 bus, u8 devfn) | |
579 | { | |
580 | struct root_entry *root; | |
581 | struct context_entry *context; | |
582 | unsigned long phy_addr; | |
583 | unsigned long flags; | |
584 | ||
585 | spin_lock_irqsave(&iommu->lock, flags); | |
586 | root = &iommu->root_entry[bus]; | |
587 | context = get_context_addr_from_root(root); | |
588 | if (!context) { | |
589 | context = (struct context_entry *)alloc_pgtable_page(); | |
590 | if (!context) { | |
591 | spin_unlock_irqrestore(&iommu->lock, flags); | |
592 | return NULL; | |
593 | } | |
5b6985ce | 594 | __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE); |
ba395927 KA |
595 | phy_addr = virt_to_phys((void *)context); |
596 | set_root_value(root, phy_addr); | |
597 | set_root_present(root); | |
598 | __iommu_flush_cache(iommu, root, sizeof(*root)); | |
599 | } | |
600 | spin_unlock_irqrestore(&iommu->lock, flags); | |
601 | return &context[devfn]; | |
602 | } | |
603 | ||
604 | static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
605 | { | |
606 | struct root_entry *root; | |
607 | struct context_entry *context; | |
608 | int ret; | |
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) { | |
615 | ret = 0; | |
616 | goto out; | |
617 | } | |
c07e7d21 | 618 | ret = context_present(&context[devfn]); |
ba395927 KA |
619 | out: |
620 | spin_unlock_irqrestore(&iommu->lock, flags); | |
621 | return ret; | |
622 | } | |
623 | ||
624 | static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
625 | { | |
626 | struct root_entry *root; | |
627 | struct context_entry *context; | |
628 | unsigned long flags; | |
629 | ||
630 | spin_lock_irqsave(&iommu->lock, flags); | |
631 | root = &iommu->root_entry[bus]; | |
632 | context = get_context_addr_from_root(root); | |
633 | if (context) { | |
c07e7d21 | 634 | context_clear_entry(&context[devfn]); |
ba395927 KA |
635 | __iommu_flush_cache(iommu, &context[devfn], \ |
636 | sizeof(*context)); | |
637 | } | |
638 | spin_unlock_irqrestore(&iommu->lock, flags); | |
639 | } | |
640 | ||
641 | static void free_context_table(struct intel_iommu *iommu) | |
642 | { | |
643 | struct root_entry *root; | |
644 | int i; | |
645 | unsigned long flags; | |
646 | struct context_entry *context; | |
647 | ||
648 | spin_lock_irqsave(&iommu->lock, flags); | |
649 | if (!iommu->root_entry) { | |
650 | goto out; | |
651 | } | |
652 | for (i = 0; i < ROOT_ENTRY_NR; i++) { | |
653 | root = &iommu->root_entry[i]; | |
654 | context = get_context_addr_from_root(root); | |
655 | if (context) | |
656 | free_pgtable_page(context); | |
657 | } | |
658 | free_pgtable_page(iommu->root_entry); | |
659 | iommu->root_entry = NULL; | |
660 | out: | |
661 | spin_unlock_irqrestore(&iommu->lock, flags); | |
662 | } | |
663 | ||
664 | /* page table handling */ | |
665 | #define LEVEL_STRIDE (9) | |
666 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | |
667 | ||
668 | static inline int agaw_to_level(int agaw) | |
669 | { | |
670 | return agaw + 2; | |
671 | } | |
672 | ||
673 | static inline int agaw_to_width(int agaw) | |
674 | { | |
675 | return 30 + agaw * LEVEL_STRIDE; | |
676 | ||
677 | } | |
678 | ||
679 | static inline int width_to_agaw(int width) | |
680 | { | |
681 | return (width - 30) / LEVEL_STRIDE; | |
682 | } | |
683 | ||
684 | static inline unsigned int level_to_offset_bits(int level) | |
685 | { | |
6660c63a | 686 | return (level - 1) * LEVEL_STRIDE; |
ba395927 KA |
687 | } |
688 | ||
77dfa56c | 689 | static inline int pfn_level_offset(unsigned long pfn, int level) |
ba395927 | 690 | { |
6660c63a | 691 | return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; |
ba395927 KA |
692 | } |
693 | ||
6660c63a | 694 | static inline unsigned long level_mask(int level) |
ba395927 | 695 | { |
6660c63a | 696 | return -1UL << level_to_offset_bits(level); |
ba395927 KA |
697 | } |
698 | ||
6660c63a | 699 | static inline unsigned long level_size(int level) |
ba395927 | 700 | { |
6660c63a | 701 | return 1UL << level_to_offset_bits(level); |
ba395927 KA |
702 | } |
703 | ||
6660c63a | 704 | static inline unsigned long align_to_level(unsigned long pfn, int level) |
ba395927 | 705 | { |
6660c63a | 706 | return (pfn + level_size(level) - 1) & level_mask(level); |
ba395927 KA |
707 | } |
708 | ||
b026fd28 DW |
709 | static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, |
710 | unsigned long pfn) | |
ba395927 | 711 | { |
b026fd28 | 712 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
ba395927 KA |
713 | struct dma_pte *parent, *pte = NULL; |
714 | int level = agaw_to_level(domain->agaw); | |
715 | int offset; | |
ba395927 KA |
716 | |
717 | BUG_ON(!domain->pgd); | |
b026fd28 | 718 | BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width); |
ba395927 KA |
719 | parent = domain->pgd; |
720 | ||
ba395927 KA |
721 | while (level > 0) { |
722 | void *tmp_page; | |
723 | ||
b026fd28 | 724 | offset = pfn_level_offset(pfn, level); |
ba395927 KA |
725 | pte = &parent[offset]; |
726 | if (level == 1) | |
727 | break; | |
728 | ||
19c239ce | 729 | if (!dma_pte_present(pte)) { |
c85994e4 DW |
730 | uint64_t pteval; |
731 | ||
ba395927 KA |
732 | tmp_page = alloc_pgtable_page(); |
733 | ||
206a73c1 | 734 | if (!tmp_page) |
ba395927 | 735 | return NULL; |
206a73c1 | 736 | |
c85994e4 | 737 | domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE); |
64de5af0 | 738 | pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE; |
c85994e4 DW |
739 | if (cmpxchg64(&pte->val, 0ULL, pteval)) { |
740 | /* Someone else set it while we were thinking; use theirs. */ | |
741 | free_pgtable_page(tmp_page); | |
742 | } else { | |
743 | dma_pte_addr(pte); | |
744 | domain_flush_cache(domain, pte, sizeof(*pte)); | |
745 | } | |
ba395927 | 746 | } |
19c239ce | 747 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
748 | level--; |
749 | } | |
750 | ||
ba395927 KA |
751 | return pte; |
752 | } | |
753 | ||
754 | /* return address's pte at specific level */ | |
90dcfb5e DW |
755 | static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, |
756 | unsigned long pfn, | |
757 | int level) | |
ba395927 KA |
758 | { |
759 | struct dma_pte *parent, *pte = NULL; | |
760 | int total = agaw_to_level(domain->agaw); | |
761 | int offset; | |
762 | ||
763 | parent = domain->pgd; | |
764 | while (level <= total) { | |
90dcfb5e | 765 | offset = pfn_level_offset(pfn, total); |
ba395927 KA |
766 | pte = &parent[offset]; |
767 | if (level == total) | |
768 | return pte; | |
769 | ||
19c239ce | 770 | if (!dma_pte_present(pte)) |
ba395927 | 771 | break; |
19c239ce | 772 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
773 | total--; |
774 | } | |
775 | return NULL; | |
776 | } | |
777 | ||
ba395927 | 778 | /* clear last level pte, a tlb flush should be followed */ |
595badf5 DW |
779 | static void dma_pte_clear_range(struct dmar_domain *domain, |
780 | unsigned long start_pfn, | |
781 | unsigned long last_pfn) | |
ba395927 | 782 | { |
04b18e65 | 783 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
310a5ab9 | 784 | struct dma_pte *first_pte, *pte; |
66eae846 | 785 | |
04b18e65 | 786 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
595badf5 | 787 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); |
59c36286 | 788 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 789 | |
04b18e65 | 790 | /* we don't need lock here; nobody else touches the iova range */ |
59c36286 | 791 | do { |
310a5ab9 DW |
792 | first_pte = pte = dma_pfn_level_pte(domain, start_pfn, 1); |
793 | if (!pte) { | |
794 | start_pfn = align_to_level(start_pfn + 1, 2); | |
795 | continue; | |
796 | } | |
75e6bf96 | 797 | do { |
310a5ab9 DW |
798 | dma_clear_pte(pte); |
799 | start_pfn++; | |
800 | pte++; | |
75e6bf96 DW |
801 | } while (start_pfn <= last_pfn && !first_pte_in_page(pte)); |
802 | ||
310a5ab9 DW |
803 | domain_flush_cache(domain, first_pte, |
804 | (void *)pte - (void *)first_pte); | |
59c36286 DW |
805 | |
806 | } while (start_pfn && start_pfn <= last_pfn); | |
ba395927 KA |
807 | } |
808 | ||
809 | /* free page table pages. last level pte should already be cleared */ | |
810 | static void dma_pte_free_pagetable(struct dmar_domain *domain, | |
d794dc9b DW |
811 | unsigned long start_pfn, |
812 | unsigned long last_pfn) | |
ba395927 | 813 | { |
6660c63a | 814 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
f3a0a52f | 815 | struct dma_pte *first_pte, *pte; |
ba395927 KA |
816 | int total = agaw_to_level(domain->agaw); |
817 | int level; | |
6660c63a | 818 | unsigned long tmp; |
ba395927 | 819 | |
6660c63a DW |
820 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
821 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); | |
59c36286 | 822 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 823 | |
f3a0a52f | 824 | /* We don't need lock here; nobody else touches the iova range */ |
ba395927 KA |
825 | level = 2; |
826 | while (level <= total) { | |
6660c63a DW |
827 | tmp = align_to_level(start_pfn, level); |
828 | ||
f3a0a52f | 829 | /* If we can't even clear one PTE at this level, we're done */ |
6660c63a | 830 | if (tmp + level_size(level) - 1 > last_pfn) |
ba395927 KA |
831 | return; |
832 | ||
59c36286 | 833 | do { |
f3a0a52f DW |
834 | first_pte = pte = dma_pfn_level_pte(domain, tmp, level); |
835 | if (!pte) { | |
836 | tmp = align_to_level(tmp + 1, level + 1); | |
837 | continue; | |
838 | } | |
75e6bf96 | 839 | do { |
6a43e574 DW |
840 | if (dma_pte_present(pte)) { |
841 | free_pgtable_page(phys_to_virt(dma_pte_addr(pte))); | |
842 | dma_clear_pte(pte); | |
843 | } | |
f3a0a52f DW |
844 | pte++; |
845 | tmp += level_size(level); | |
75e6bf96 DW |
846 | } while (!first_pte_in_page(pte) && |
847 | tmp + level_size(level) - 1 <= last_pfn); | |
848 | ||
f3a0a52f DW |
849 | domain_flush_cache(domain, first_pte, |
850 | (void *)pte - (void *)first_pte); | |
851 | ||
59c36286 | 852 | } while (tmp && tmp + level_size(level) - 1 <= last_pfn); |
ba395927 KA |
853 | level++; |
854 | } | |
855 | /* free pgd */ | |
d794dc9b | 856 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { |
ba395927 KA |
857 | free_pgtable_page(domain->pgd); |
858 | domain->pgd = NULL; | |
859 | } | |
860 | } | |
861 | ||
862 | /* iommu handling */ | |
863 | static int iommu_alloc_root_entry(struct intel_iommu *iommu) | |
864 | { | |
865 | struct root_entry *root; | |
866 | unsigned long flags; | |
867 | ||
868 | root = (struct root_entry *)alloc_pgtable_page(); | |
869 | if (!root) | |
870 | return -ENOMEM; | |
871 | ||
5b6985ce | 872 | __iommu_flush_cache(iommu, root, ROOT_SIZE); |
ba395927 KA |
873 | |
874 | spin_lock_irqsave(&iommu->lock, flags); | |
875 | iommu->root_entry = root; | |
876 | spin_unlock_irqrestore(&iommu->lock, flags); | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
ba395927 KA |
881 | static void iommu_set_root_entry(struct intel_iommu *iommu) |
882 | { | |
883 | void *addr; | |
c416daa9 | 884 | u32 sts; |
ba395927 KA |
885 | unsigned long flag; |
886 | ||
887 | addr = iommu->root_entry; | |
888 | ||
889 | spin_lock_irqsave(&iommu->register_lock, flag); | |
890 | dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr)); | |
891 | ||
c416daa9 | 892 | writel(iommu->gcmd | DMA_GCMD_SRTP, 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, (sts & DMA_GSTS_RTPS), sts); |
ba395927 KA |
897 | |
898 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
899 | } | |
900 | ||
901 | static void iommu_flush_write_buffer(struct intel_iommu *iommu) | |
902 | { | |
903 | u32 val; | |
904 | unsigned long flag; | |
905 | ||
9af88143 | 906 | if (!rwbf_quirk && !cap_rwbf(iommu->cap)) |
ba395927 | 907 | return; |
ba395927 KA |
908 | |
909 | spin_lock_irqsave(&iommu->register_lock, flag); | |
462b60f6 | 910 | writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
911 | |
912 | /* Make sure hardware complete it */ | |
913 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 914 | readl, (!(val & DMA_GSTS_WBFS)), val); |
ba395927 KA |
915 | |
916 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
917 | } | |
918 | ||
919 | /* return value determine if we need a write buffer flush */ | |
4c25a2c1 DW |
920 | static void __iommu_flush_context(struct intel_iommu *iommu, |
921 | u16 did, u16 source_id, u8 function_mask, | |
922 | u64 type) | |
ba395927 KA |
923 | { |
924 | u64 val = 0; | |
925 | unsigned long flag; | |
926 | ||
ba395927 KA |
927 | switch (type) { |
928 | case DMA_CCMD_GLOBAL_INVL: | |
929 | val = DMA_CCMD_GLOBAL_INVL; | |
930 | break; | |
931 | case DMA_CCMD_DOMAIN_INVL: | |
932 | val = DMA_CCMD_DOMAIN_INVL|DMA_CCMD_DID(did); | |
933 | break; | |
934 | case DMA_CCMD_DEVICE_INVL: | |
935 | val = DMA_CCMD_DEVICE_INVL|DMA_CCMD_DID(did) | |
936 | | DMA_CCMD_SID(source_id) | DMA_CCMD_FM(function_mask); | |
937 | break; | |
938 | default: | |
939 | BUG(); | |
940 | } | |
941 | val |= DMA_CCMD_ICC; | |
942 | ||
943 | spin_lock_irqsave(&iommu->register_lock, flag); | |
944 | dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); | |
945 | ||
946 | /* Make sure hardware complete it */ | |
947 | IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, | |
948 | dmar_readq, (!(val & DMA_CCMD_ICC)), val); | |
949 | ||
950 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
ba395927 KA |
951 | } |
952 | ||
ba395927 | 953 | /* return value determine if we need a write buffer flush */ |
1f0ef2aa DW |
954 | static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, |
955 | u64 addr, unsigned int size_order, u64 type) | |
ba395927 KA |
956 | { |
957 | int tlb_offset = ecap_iotlb_offset(iommu->ecap); | |
958 | u64 val = 0, val_iva = 0; | |
959 | unsigned long flag; | |
960 | ||
ba395927 KA |
961 | switch (type) { |
962 | case DMA_TLB_GLOBAL_FLUSH: | |
963 | /* global flush doesn't need set IVA_REG */ | |
964 | val = DMA_TLB_GLOBAL_FLUSH|DMA_TLB_IVT; | |
965 | break; | |
966 | case DMA_TLB_DSI_FLUSH: | |
967 | val = DMA_TLB_DSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
968 | break; | |
969 | case DMA_TLB_PSI_FLUSH: | |
970 | val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
971 | /* Note: always flush non-leaf currently */ | |
972 | val_iva = size_order | addr; | |
973 | break; | |
974 | default: | |
975 | BUG(); | |
976 | } | |
977 | /* Note: set drain read/write */ | |
978 | #if 0 | |
979 | /* | |
980 | * This is probably to be super secure.. Looks like we can | |
981 | * ignore it without any impact. | |
982 | */ | |
983 | if (cap_read_drain(iommu->cap)) | |
984 | val |= DMA_TLB_READ_DRAIN; | |
985 | #endif | |
986 | if (cap_write_drain(iommu->cap)) | |
987 | val |= DMA_TLB_WRITE_DRAIN; | |
988 | ||
989 | spin_lock_irqsave(&iommu->register_lock, flag); | |
990 | /* Note: Only uses first TLB reg currently */ | |
991 | if (val_iva) | |
992 | dmar_writeq(iommu->reg + tlb_offset, val_iva); | |
993 | dmar_writeq(iommu->reg + tlb_offset + 8, val); | |
994 | ||
995 | /* Make sure hardware complete it */ | |
996 | IOMMU_WAIT_OP(iommu, tlb_offset + 8, | |
997 | dmar_readq, (!(val & DMA_TLB_IVT)), val); | |
998 | ||
999 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
1000 | ||
1001 | /* check IOTLB invalidation granularity */ | |
1002 | if (DMA_TLB_IAIG(val) == 0) | |
1003 | printk(KERN_ERR"IOMMU: flush IOTLB failed\n"); | |
1004 | if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type)) | |
1005 | pr_debug("IOMMU: tlb flush request %Lx, actual %Lx\n", | |
5b6985ce FY |
1006 | (unsigned long long)DMA_TLB_IIRG(type), |
1007 | (unsigned long long)DMA_TLB_IAIG(val)); | |
ba395927 KA |
1008 | } |
1009 | ||
93a23a72 YZ |
1010 | static struct device_domain_info *iommu_support_dev_iotlb( |
1011 | struct dmar_domain *domain, int segment, u8 bus, u8 devfn) | |
1012 | { | |
1013 | int found = 0; | |
1014 | unsigned long flags; | |
1015 | struct device_domain_info *info; | |
1016 | struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); | |
1017 | ||
1018 | if (!ecap_dev_iotlb_support(iommu->ecap)) | |
1019 | return NULL; | |
1020 | ||
1021 | if (!iommu->qi) | |
1022 | return NULL; | |
1023 | ||
1024 | spin_lock_irqsave(&device_domain_lock, flags); | |
1025 | list_for_each_entry(info, &domain->devices, link) | |
1026 | if (info->bus == bus && info->devfn == devfn) { | |
1027 | found = 1; | |
1028 | break; | |
1029 | } | |
1030 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1031 | ||
1032 | if (!found || !info->dev) | |
1033 | return NULL; | |
1034 | ||
1035 | if (!pci_find_ext_capability(info->dev, PCI_EXT_CAP_ID_ATS)) | |
1036 | return NULL; | |
1037 | ||
1038 | if (!dmar_find_matched_atsr_unit(info->dev)) | |
1039 | return NULL; | |
1040 | ||
1041 | info->iommu = iommu; | |
1042 | ||
1043 | return info; | |
1044 | } | |
1045 | ||
1046 | static void iommu_enable_dev_iotlb(struct device_domain_info *info) | |
ba395927 | 1047 | { |
93a23a72 YZ |
1048 | if (!info) |
1049 | return; | |
1050 | ||
1051 | pci_enable_ats(info->dev, VTD_PAGE_SHIFT); | |
1052 | } | |
1053 | ||
1054 | static void iommu_disable_dev_iotlb(struct device_domain_info *info) | |
1055 | { | |
1056 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1057 | return; | |
1058 | ||
1059 | pci_disable_ats(info->dev); | |
1060 | } | |
1061 | ||
1062 | static void iommu_flush_dev_iotlb(struct dmar_domain *domain, | |
1063 | u64 addr, unsigned mask) | |
1064 | { | |
1065 | u16 sid, qdep; | |
1066 | unsigned long flags; | |
1067 | struct device_domain_info *info; | |
1068 | ||
1069 | spin_lock_irqsave(&device_domain_lock, flags); | |
1070 | list_for_each_entry(info, &domain->devices, link) { | |
1071 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1072 | continue; | |
1073 | ||
1074 | sid = info->bus << 8 | info->devfn; | |
1075 | qdep = pci_ats_queue_depth(info->dev); | |
1076 | qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); | |
1077 | } | |
1078 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1079 | } | |
1080 | ||
1f0ef2aa | 1081 | static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, |
03d6a246 | 1082 | unsigned long pfn, unsigned int pages) |
ba395927 | 1083 | { |
9dd2fe89 | 1084 | unsigned int mask = ilog2(__roundup_pow_of_two(pages)); |
03d6a246 | 1085 | uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; |
ba395927 | 1086 | |
ba395927 KA |
1087 | BUG_ON(pages == 0); |
1088 | ||
ba395927 | 1089 | /* |
9dd2fe89 YZ |
1090 | * Fallback to domain selective flush if no PSI support or the size is |
1091 | * too big. | |
ba395927 KA |
1092 | * PSI requires page size to be 2 ^ x, and the base address is naturally |
1093 | * aligned to the size | |
1094 | */ | |
9dd2fe89 YZ |
1095 | if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap)) |
1096 | iommu->flush.flush_iotlb(iommu, did, 0, 0, | |
1f0ef2aa | 1097 | DMA_TLB_DSI_FLUSH); |
9dd2fe89 YZ |
1098 | else |
1099 | iommu->flush.flush_iotlb(iommu, did, addr, mask, | |
1100 | DMA_TLB_PSI_FLUSH); | |
bf92df30 YZ |
1101 | |
1102 | /* | |
1103 | * In caching mode, domain ID 0 is reserved for non-present to present | |
1104 | * mapping flush. Device IOTLB doesn't need to be flushed in this case. | |
1105 | */ | |
1106 | if (!cap_caching_mode(iommu->cap) || did) | |
93a23a72 | 1107 | iommu_flush_dev_iotlb(iommu->domains[did], addr, mask); |
ba395927 KA |
1108 | } |
1109 | ||
f8bab735 | 1110 | static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) |
1111 | { | |
1112 | u32 pmen; | |
1113 | unsigned long flags; | |
1114 | ||
1115 | spin_lock_irqsave(&iommu->register_lock, flags); | |
1116 | pmen = readl(iommu->reg + DMAR_PMEN_REG); | |
1117 | pmen &= ~DMA_PMEN_EPM; | |
1118 | writel(pmen, iommu->reg + DMAR_PMEN_REG); | |
1119 | ||
1120 | /* wait for the protected region status bit to clear */ | |
1121 | IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, | |
1122 | readl, !(pmen & DMA_PMEN_PRS), pmen); | |
1123 | ||
1124 | spin_unlock_irqrestore(&iommu->register_lock, flags); | |
1125 | } | |
1126 | ||
ba395927 KA |
1127 | static int iommu_enable_translation(struct intel_iommu *iommu) |
1128 | { | |
1129 | u32 sts; | |
1130 | unsigned long flags; | |
1131 | ||
1132 | spin_lock_irqsave(&iommu->register_lock, flags); | |
c416daa9 DW |
1133 | iommu->gcmd |= DMA_GCMD_TE; |
1134 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
ba395927 KA |
1135 | |
1136 | /* Make sure hardware complete it */ | |
1137 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1138 | readl, (sts & DMA_GSTS_TES), sts); |
ba395927 | 1139 | |
ba395927 KA |
1140 | spin_unlock_irqrestore(&iommu->register_lock, flags); |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | static int iommu_disable_translation(struct intel_iommu *iommu) | |
1145 | { | |
1146 | u32 sts; | |
1147 | unsigned long flag; | |
1148 | ||
1149 | spin_lock_irqsave(&iommu->register_lock, flag); | |
1150 | iommu->gcmd &= ~DMA_GCMD_TE; | |
1151 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
1152 | ||
1153 | /* Make sure hardware complete it */ | |
1154 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1155 | readl, (!(sts & DMA_GSTS_TES)), sts); |
ba395927 KA |
1156 | |
1157 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
1158 | return 0; | |
1159 | } | |
1160 | ||
3460a6d9 | 1161 | |
ba395927 KA |
1162 | static int iommu_init_domains(struct intel_iommu *iommu) |
1163 | { | |
1164 | unsigned long ndomains; | |
1165 | unsigned long nlongs; | |
1166 | ||
1167 | ndomains = cap_ndoms(iommu->cap); | |
1168 | pr_debug("Number of Domains supportd <%ld>\n", ndomains); | |
1169 | nlongs = BITS_TO_LONGS(ndomains); | |
1170 | ||
94a91b50 DD |
1171 | spin_lock_init(&iommu->lock); |
1172 | ||
ba395927 KA |
1173 | /* TBD: there might be 64K domains, |
1174 | * consider other allocation for future chip | |
1175 | */ | |
1176 | iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); | |
1177 | if (!iommu->domain_ids) { | |
1178 | printk(KERN_ERR "Allocating domain id array failed\n"); | |
1179 | return -ENOMEM; | |
1180 | } | |
1181 | iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *), | |
1182 | GFP_KERNEL); | |
1183 | if (!iommu->domains) { | |
1184 | printk(KERN_ERR "Allocating domain array failed\n"); | |
ba395927 KA |
1185 | return -ENOMEM; |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * if Caching mode is set, then invalid translations are tagged | |
1190 | * with domainid 0. Hence we need to pre-allocate it. | |
1191 | */ | |
1192 | if (cap_caching_mode(iommu->cap)) | |
1193 | set_bit(0, iommu->domain_ids); | |
1194 | return 0; | |
1195 | } | |
ba395927 | 1196 | |
ba395927 KA |
1197 | |
1198 | static void domain_exit(struct dmar_domain *domain); | |
5e98c4b1 | 1199 | static void vm_domain_exit(struct dmar_domain *domain); |
e61d98d8 SS |
1200 | |
1201 | void free_dmar_iommu(struct intel_iommu *iommu) | |
ba395927 KA |
1202 | { |
1203 | struct dmar_domain *domain; | |
1204 | int i; | |
c7151a8d | 1205 | unsigned long flags; |
ba395927 | 1206 | |
94a91b50 DD |
1207 | if ((iommu->domains) && (iommu->domain_ids)) { |
1208 | i = find_first_bit(iommu->domain_ids, cap_ndoms(iommu->cap)); | |
1209 | for (; i < cap_ndoms(iommu->cap); ) { | |
1210 | domain = iommu->domains[i]; | |
1211 | clear_bit(i, iommu->domain_ids); | |
1212 | ||
1213 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1214 | if (--domain->iommu_count == 0) { | |
1215 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) | |
1216 | vm_domain_exit(domain); | |
1217 | else | |
1218 | domain_exit(domain); | |
1219 | } | |
1220 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
c7151a8d | 1221 | |
94a91b50 DD |
1222 | i = find_next_bit(iommu->domain_ids, |
1223 | cap_ndoms(iommu->cap), i+1); | |
1224 | } | |
ba395927 KA |
1225 | } |
1226 | ||
1227 | if (iommu->gcmd & DMA_GCMD_TE) | |
1228 | iommu_disable_translation(iommu); | |
1229 | ||
1230 | if (iommu->irq) { | |
1231 | set_irq_data(iommu->irq, NULL); | |
1232 | /* This will mask the irq */ | |
1233 | free_irq(iommu->irq, iommu); | |
1234 | destroy_irq(iommu->irq); | |
1235 | } | |
1236 | ||
1237 | kfree(iommu->domains); | |
1238 | kfree(iommu->domain_ids); | |
1239 | ||
d9630fe9 WH |
1240 | g_iommus[iommu->seq_id] = NULL; |
1241 | ||
1242 | /* if all iommus are freed, free g_iommus */ | |
1243 | for (i = 0; i < g_num_of_iommus; i++) { | |
1244 | if (g_iommus[i]) | |
1245 | break; | |
1246 | } | |
1247 | ||
1248 | if (i == g_num_of_iommus) | |
1249 | kfree(g_iommus); | |
1250 | ||
ba395927 KA |
1251 | /* free context mapping */ |
1252 | free_context_table(iommu); | |
ba395927 KA |
1253 | } |
1254 | ||
2c2e2c38 | 1255 | static struct dmar_domain *alloc_domain(void) |
ba395927 | 1256 | { |
ba395927 | 1257 | struct dmar_domain *domain; |
ba395927 KA |
1258 | |
1259 | domain = alloc_domain_mem(); | |
1260 | if (!domain) | |
1261 | return NULL; | |
1262 | ||
2c2e2c38 FY |
1263 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); |
1264 | domain->flags = 0; | |
1265 | ||
1266 | return domain; | |
1267 | } | |
1268 | ||
1269 | static int iommu_attach_domain(struct dmar_domain *domain, | |
1270 | struct intel_iommu *iommu) | |
1271 | { | |
1272 | int num; | |
1273 | unsigned long ndomains; | |
1274 | unsigned long flags; | |
1275 | ||
ba395927 KA |
1276 | ndomains = cap_ndoms(iommu->cap); |
1277 | ||
1278 | spin_lock_irqsave(&iommu->lock, flags); | |
2c2e2c38 | 1279 | |
ba395927 KA |
1280 | num = find_first_zero_bit(iommu->domain_ids, ndomains); |
1281 | if (num >= ndomains) { | |
1282 | spin_unlock_irqrestore(&iommu->lock, flags); | |
ba395927 | 1283 | printk(KERN_ERR "IOMMU: no free domain ids\n"); |
2c2e2c38 | 1284 | return -ENOMEM; |
ba395927 KA |
1285 | } |
1286 | ||
ba395927 | 1287 | domain->id = num; |
2c2e2c38 | 1288 | set_bit(num, iommu->domain_ids); |
8c11e798 | 1289 | set_bit(iommu->seq_id, &domain->iommu_bmp); |
ba395927 KA |
1290 | iommu->domains[num] = domain; |
1291 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1292 | ||
2c2e2c38 | 1293 | return 0; |
ba395927 KA |
1294 | } |
1295 | ||
2c2e2c38 FY |
1296 | static void iommu_detach_domain(struct dmar_domain *domain, |
1297 | struct intel_iommu *iommu) | |
ba395927 KA |
1298 | { |
1299 | unsigned long flags; | |
2c2e2c38 FY |
1300 | int num, ndomains; |
1301 | int found = 0; | |
ba395927 | 1302 | |
8c11e798 | 1303 | spin_lock_irqsave(&iommu->lock, flags); |
2c2e2c38 FY |
1304 | ndomains = cap_ndoms(iommu->cap); |
1305 | num = find_first_bit(iommu->domain_ids, ndomains); | |
1306 | for (; num < ndomains; ) { | |
1307 | if (iommu->domains[num] == domain) { | |
1308 | found = 1; | |
1309 | break; | |
1310 | } | |
1311 | num = find_next_bit(iommu->domain_ids, | |
1312 | cap_ndoms(iommu->cap), num+1); | |
1313 | } | |
1314 | ||
1315 | if (found) { | |
1316 | clear_bit(num, iommu->domain_ids); | |
1317 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
1318 | iommu->domains[num] = NULL; | |
1319 | } | |
8c11e798 | 1320 | spin_unlock_irqrestore(&iommu->lock, flags); |
ba395927 KA |
1321 | } |
1322 | ||
1323 | static struct iova_domain reserved_iova_list; | |
8a443df4 | 1324 | static struct lock_class_key reserved_rbtree_key; |
ba395927 KA |
1325 | |
1326 | static void dmar_init_reserved_ranges(void) | |
1327 | { | |
1328 | struct pci_dev *pdev = NULL; | |
1329 | struct iova *iova; | |
1330 | int i; | |
ba395927 | 1331 | |
f661197e | 1332 | init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN); |
ba395927 | 1333 | |
8a443df4 MG |
1334 | lockdep_set_class(&reserved_iova_list.iova_rbtree_lock, |
1335 | &reserved_rbtree_key); | |
1336 | ||
ba395927 KA |
1337 | /* IOAPIC ranges shouldn't be accessed by DMA */ |
1338 | iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START), | |
1339 | IOVA_PFN(IOAPIC_RANGE_END)); | |
1340 | if (!iova) | |
1341 | printk(KERN_ERR "Reserve IOAPIC range failed\n"); | |
1342 | ||
1343 | /* Reserve all PCI MMIO to avoid peer-to-peer access */ | |
1344 | for_each_pci_dev(pdev) { | |
1345 | struct resource *r; | |
1346 | ||
1347 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1348 | r = &pdev->resource[i]; | |
1349 | if (!r->flags || !(r->flags & IORESOURCE_MEM)) | |
1350 | continue; | |
1a4a4551 DW |
1351 | iova = reserve_iova(&reserved_iova_list, |
1352 | IOVA_PFN(r->start), | |
1353 | IOVA_PFN(r->end)); | |
ba395927 KA |
1354 | if (!iova) |
1355 | printk(KERN_ERR "Reserve iova failed\n"); | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | } | |
1360 | ||
1361 | static void domain_reserve_special_ranges(struct dmar_domain *domain) | |
1362 | { | |
1363 | copy_reserved_iova(&reserved_iova_list, &domain->iovad); | |
1364 | } | |
1365 | ||
1366 | static inline int guestwidth_to_adjustwidth(int gaw) | |
1367 | { | |
1368 | int agaw; | |
1369 | int r = (gaw - 12) % 9; | |
1370 | ||
1371 | if (r == 0) | |
1372 | agaw = gaw; | |
1373 | else | |
1374 | agaw = gaw + 9 - r; | |
1375 | if (agaw > 64) | |
1376 | agaw = 64; | |
1377 | return agaw; | |
1378 | } | |
1379 | ||
1380 | static int domain_init(struct dmar_domain *domain, int guest_width) | |
1381 | { | |
1382 | struct intel_iommu *iommu; | |
1383 | int adjust_width, agaw; | |
1384 | unsigned long sagaw; | |
1385 | ||
f661197e | 1386 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); |
c7151a8d | 1387 | spin_lock_init(&domain->iommu_lock); |
ba395927 KA |
1388 | |
1389 | domain_reserve_special_ranges(domain); | |
1390 | ||
1391 | /* calculate AGAW */ | |
8c11e798 | 1392 | iommu = domain_get_iommu(domain); |
ba395927 KA |
1393 | if (guest_width > cap_mgaw(iommu->cap)) |
1394 | guest_width = cap_mgaw(iommu->cap); | |
1395 | domain->gaw = guest_width; | |
1396 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
1397 | agaw = width_to_agaw(adjust_width); | |
1398 | sagaw = cap_sagaw(iommu->cap); | |
1399 | if (!test_bit(agaw, &sagaw)) { | |
1400 | /* hardware doesn't support it, choose a bigger one */ | |
1401 | pr_debug("IOMMU: hardware doesn't support agaw %d\n", agaw); | |
1402 | agaw = find_next_bit(&sagaw, 5, agaw); | |
1403 | if (agaw >= 5) | |
1404 | return -ENODEV; | |
1405 | } | |
1406 | domain->agaw = agaw; | |
1407 | INIT_LIST_HEAD(&domain->devices); | |
1408 | ||
8e604097 WH |
1409 | if (ecap_coherent(iommu->ecap)) |
1410 | domain->iommu_coherency = 1; | |
1411 | else | |
1412 | domain->iommu_coherency = 0; | |
1413 | ||
58c610bd SY |
1414 | if (ecap_sc_support(iommu->ecap)) |
1415 | domain->iommu_snooping = 1; | |
1416 | else | |
1417 | domain->iommu_snooping = 0; | |
1418 | ||
c7151a8d WH |
1419 | domain->iommu_count = 1; |
1420 | ||
ba395927 KA |
1421 | /* always allocate the top pgd */ |
1422 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(); | |
1423 | if (!domain->pgd) | |
1424 | return -ENOMEM; | |
5b6985ce | 1425 | __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE); |
ba395927 KA |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | static void domain_exit(struct dmar_domain *domain) | |
1430 | { | |
2c2e2c38 FY |
1431 | struct dmar_drhd_unit *drhd; |
1432 | struct intel_iommu *iommu; | |
ba395927 KA |
1433 | |
1434 | /* Domain 0 is reserved, so dont process it */ | |
1435 | if (!domain) | |
1436 | return; | |
1437 | ||
1438 | domain_remove_dev_info(domain); | |
1439 | /* destroy iovas */ | |
1440 | put_iova_domain(&domain->iovad); | |
ba395927 KA |
1441 | |
1442 | /* clear ptes */ | |
595badf5 | 1443 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 KA |
1444 | |
1445 | /* free page tables */ | |
d794dc9b | 1446 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 | 1447 | |
2c2e2c38 FY |
1448 | for_each_active_iommu(iommu, drhd) |
1449 | if (test_bit(iommu->seq_id, &domain->iommu_bmp)) | |
1450 | iommu_detach_domain(domain, iommu); | |
1451 | ||
ba395927 KA |
1452 | free_domain_mem(domain); |
1453 | } | |
1454 | ||
4ed0d3e6 FY |
1455 | static int domain_context_mapping_one(struct dmar_domain *domain, int segment, |
1456 | u8 bus, u8 devfn, int translation) | |
ba395927 KA |
1457 | { |
1458 | struct context_entry *context; | |
ba395927 | 1459 | unsigned long flags; |
5331fe6f | 1460 | struct intel_iommu *iommu; |
ea6606b0 WH |
1461 | struct dma_pte *pgd; |
1462 | unsigned long num; | |
1463 | unsigned long ndomains; | |
1464 | int id; | |
1465 | int agaw; | |
93a23a72 | 1466 | struct device_domain_info *info = NULL; |
ba395927 KA |
1467 | |
1468 | pr_debug("Set context mapping for %02x:%02x.%d\n", | |
1469 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
4ed0d3e6 | 1470 | |
ba395927 | 1471 | BUG_ON(!domain->pgd); |
4ed0d3e6 FY |
1472 | BUG_ON(translation != CONTEXT_TT_PASS_THROUGH && |
1473 | translation != CONTEXT_TT_MULTI_LEVEL); | |
5331fe6f | 1474 | |
276dbf99 | 1475 | iommu = device_to_iommu(segment, bus, devfn); |
5331fe6f WH |
1476 | if (!iommu) |
1477 | return -ENODEV; | |
1478 | ||
ba395927 KA |
1479 | context = device_to_context_entry(iommu, bus, devfn); |
1480 | if (!context) | |
1481 | return -ENOMEM; | |
1482 | spin_lock_irqsave(&iommu->lock, flags); | |
c07e7d21 | 1483 | if (context_present(context)) { |
ba395927 KA |
1484 | spin_unlock_irqrestore(&iommu->lock, flags); |
1485 | return 0; | |
1486 | } | |
1487 | ||
ea6606b0 WH |
1488 | id = domain->id; |
1489 | pgd = domain->pgd; | |
1490 | ||
2c2e2c38 FY |
1491 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
1492 | domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) { | |
ea6606b0 WH |
1493 | int found = 0; |
1494 | ||
1495 | /* find an available domain id for this device in iommu */ | |
1496 | ndomains = cap_ndoms(iommu->cap); | |
1497 | num = find_first_bit(iommu->domain_ids, ndomains); | |
1498 | for (; num < ndomains; ) { | |
1499 | if (iommu->domains[num] == domain) { | |
1500 | id = num; | |
1501 | found = 1; | |
1502 | break; | |
1503 | } | |
1504 | num = find_next_bit(iommu->domain_ids, | |
1505 | cap_ndoms(iommu->cap), num+1); | |
1506 | } | |
1507 | ||
1508 | if (found == 0) { | |
1509 | num = find_first_zero_bit(iommu->domain_ids, ndomains); | |
1510 | if (num >= ndomains) { | |
1511 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1512 | printk(KERN_ERR "IOMMU: no free domain ids\n"); | |
1513 | return -EFAULT; | |
1514 | } | |
1515 | ||
1516 | set_bit(num, iommu->domain_ids); | |
1517 | iommu->domains[num] = domain; | |
1518 | id = num; | |
1519 | } | |
1520 | ||
1521 | /* Skip top levels of page tables for | |
1522 | * iommu which has less agaw than default. | |
1523 | */ | |
1524 | for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) { | |
1525 | pgd = phys_to_virt(dma_pte_addr(pgd)); | |
1526 | if (!dma_pte_present(pgd)) { | |
1527 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1528 | return -ENOMEM; | |
1529 | } | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | context_set_domain_id(context, id); | |
4ed0d3e6 | 1534 | |
93a23a72 YZ |
1535 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1536 | info = iommu_support_dev_iotlb(domain, segment, bus, devfn); | |
1537 | translation = info ? CONTEXT_TT_DEV_IOTLB : | |
1538 | CONTEXT_TT_MULTI_LEVEL; | |
1539 | } | |
4ed0d3e6 FY |
1540 | /* |
1541 | * In pass through mode, AW must be programmed to indicate the largest | |
1542 | * AGAW value supported by hardware. And ASR is ignored by hardware. | |
1543 | */ | |
93a23a72 | 1544 | if (unlikely(translation == CONTEXT_TT_PASS_THROUGH)) |
4ed0d3e6 | 1545 | context_set_address_width(context, iommu->msagaw); |
93a23a72 YZ |
1546 | else { |
1547 | context_set_address_root(context, virt_to_phys(pgd)); | |
1548 | context_set_address_width(context, iommu->agaw); | |
1549 | } | |
4ed0d3e6 FY |
1550 | |
1551 | context_set_translation_type(context, translation); | |
c07e7d21 MM |
1552 | context_set_fault_enable(context); |
1553 | context_set_present(context); | |
5331fe6f | 1554 | domain_flush_cache(domain, context, sizeof(*context)); |
ba395927 | 1555 | |
4c25a2c1 DW |
1556 | /* |
1557 | * It's a non-present to present mapping. If hardware doesn't cache | |
1558 | * non-present entry we only need to flush the write-buffer. If the | |
1559 | * _does_ cache non-present entries, then it does so in the special | |
1560 | * domain #0, which we have to flush: | |
1561 | */ | |
1562 | if (cap_caching_mode(iommu->cap)) { | |
1563 | iommu->flush.flush_context(iommu, 0, | |
1564 | (((u16)bus) << 8) | devfn, | |
1565 | DMA_CCMD_MASK_NOBIT, | |
1566 | DMA_CCMD_DEVICE_INVL); | |
1f0ef2aa | 1567 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_DSI_FLUSH); |
4c25a2c1 | 1568 | } else { |
ba395927 | 1569 | iommu_flush_write_buffer(iommu); |
4c25a2c1 | 1570 | } |
93a23a72 | 1571 | iommu_enable_dev_iotlb(info); |
ba395927 | 1572 | spin_unlock_irqrestore(&iommu->lock, flags); |
c7151a8d WH |
1573 | |
1574 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1575 | if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) { | |
1576 | domain->iommu_count++; | |
58c610bd | 1577 | domain_update_iommu_cap(domain); |
c7151a8d WH |
1578 | } |
1579 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
ba395927 KA |
1580 | return 0; |
1581 | } | |
1582 | ||
1583 | static int | |
4ed0d3e6 FY |
1584 | domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, |
1585 | int translation) | |
ba395927 KA |
1586 | { |
1587 | int ret; | |
1588 | struct pci_dev *tmp, *parent; | |
1589 | ||
276dbf99 | 1590 | ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus), |
4ed0d3e6 FY |
1591 | pdev->bus->number, pdev->devfn, |
1592 | translation); | |
ba395927 KA |
1593 | if (ret) |
1594 | return ret; | |
1595 | ||
1596 | /* dependent device mapping */ | |
1597 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1598 | if (!tmp) | |
1599 | return 0; | |
1600 | /* Secondary interface's bus number and devfn 0 */ | |
1601 | parent = pdev->bus->self; | |
1602 | while (parent != tmp) { | |
276dbf99 DW |
1603 | ret = domain_context_mapping_one(domain, |
1604 | pci_domain_nr(parent->bus), | |
1605 | parent->bus->number, | |
4ed0d3e6 | 1606 | parent->devfn, translation); |
ba395927 KA |
1607 | if (ret) |
1608 | return ret; | |
1609 | parent = parent->bus->self; | |
1610 | } | |
1611 | if (tmp->is_pcie) /* this is a PCIE-to-PCI bridge */ | |
1612 | return domain_context_mapping_one(domain, | |
276dbf99 | 1613 | pci_domain_nr(tmp->subordinate), |
4ed0d3e6 FY |
1614 | tmp->subordinate->number, 0, |
1615 | translation); | |
ba395927 KA |
1616 | else /* this is a legacy PCI bridge */ |
1617 | return domain_context_mapping_one(domain, | |
276dbf99 DW |
1618 | pci_domain_nr(tmp->bus), |
1619 | tmp->bus->number, | |
4ed0d3e6 FY |
1620 | tmp->devfn, |
1621 | translation); | |
ba395927 KA |
1622 | } |
1623 | ||
5331fe6f | 1624 | static int domain_context_mapped(struct pci_dev *pdev) |
ba395927 KA |
1625 | { |
1626 | int ret; | |
1627 | struct pci_dev *tmp, *parent; | |
5331fe6f WH |
1628 | struct intel_iommu *iommu; |
1629 | ||
276dbf99 DW |
1630 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
1631 | pdev->devfn); | |
5331fe6f WH |
1632 | if (!iommu) |
1633 | return -ENODEV; | |
ba395927 | 1634 | |
276dbf99 | 1635 | ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); |
ba395927 KA |
1636 | if (!ret) |
1637 | return ret; | |
1638 | /* dependent device mapping */ | |
1639 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1640 | if (!tmp) | |
1641 | return ret; | |
1642 | /* Secondary interface's bus number and devfn 0 */ | |
1643 | parent = pdev->bus->self; | |
1644 | while (parent != tmp) { | |
8c11e798 | 1645 | ret = device_context_mapped(iommu, parent->bus->number, |
276dbf99 | 1646 | parent->devfn); |
ba395927 KA |
1647 | if (!ret) |
1648 | return ret; | |
1649 | parent = parent->bus->self; | |
1650 | } | |
1651 | if (tmp->is_pcie) | |
276dbf99 DW |
1652 | return device_context_mapped(iommu, tmp->subordinate->number, |
1653 | 0); | |
ba395927 | 1654 | else |
276dbf99 DW |
1655 | return device_context_mapped(iommu, tmp->bus->number, |
1656 | tmp->devfn); | |
ba395927 KA |
1657 | } |
1658 | ||
f532959b FY |
1659 | /* Returns a number of VTD pages, but aligned to MM page size */ |
1660 | static inline unsigned long aligned_nrpages(unsigned long host_addr, | |
1661 | size_t size) | |
1662 | { | |
1663 | host_addr &= ~PAGE_MASK; | |
1664 | return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT; | |
1665 | } | |
1666 | ||
9051aa02 DW |
1667 | static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1668 | struct scatterlist *sg, unsigned long phys_pfn, | |
1669 | unsigned long nr_pages, int prot) | |
e1605495 DW |
1670 | { |
1671 | struct dma_pte *first_pte = NULL, *pte = NULL; | |
9051aa02 | 1672 | phys_addr_t uninitialized_var(pteval); |
e1605495 | 1673 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
9051aa02 | 1674 | unsigned long sg_res; |
e1605495 DW |
1675 | |
1676 | BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); | |
1677 | ||
1678 | if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP; | |
1682 | ||
9051aa02 DW |
1683 | if (sg) |
1684 | sg_res = 0; | |
1685 | else { | |
1686 | sg_res = nr_pages + 1; | |
1687 | pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot; | |
1688 | } | |
1689 | ||
e1605495 | 1690 | while (nr_pages--) { |
c85994e4 DW |
1691 | uint64_t tmp; |
1692 | ||
e1605495 | 1693 | if (!sg_res) { |
f532959b | 1694 | sg_res = aligned_nrpages(sg->offset, sg->length); |
e1605495 DW |
1695 | sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset; |
1696 | sg->dma_length = sg->length; | |
1697 | pteval = page_to_phys(sg_page(sg)) | prot; | |
1698 | } | |
1699 | if (!pte) { | |
1700 | first_pte = pte = pfn_to_dma_pte(domain, iov_pfn); | |
1701 | if (!pte) | |
1702 | return -ENOMEM; | |
1703 | } | |
1704 | /* We don't need lock here, nobody else | |
1705 | * touches the iova range | |
1706 | */ | |
7766a3fb | 1707 | tmp = cmpxchg64_local(&pte->val, 0ULL, pteval); |
c85994e4 | 1708 | if (tmp) { |
1bf20f0d | 1709 | static int dumps = 5; |
c85994e4 DW |
1710 | printk(KERN_CRIT "ERROR: DMA PTE for vPFN 0x%lx already set (to %llx not %llx)\n", |
1711 | iov_pfn, tmp, (unsigned long long)pteval); | |
1bf20f0d DW |
1712 | if (dumps) { |
1713 | dumps--; | |
1714 | debug_dma_dump_mappings(NULL); | |
1715 | } | |
1716 | WARN_ON(1); | |
1717 | } | |
e1605495 | 1718 | pte++; |
75e6bf96 | 1719 | if (!nr_pages || first_pte_in_page(pte)) { |
e1605495 DW |
1720 | domain_flush_cache(domain, first_pte, |
1721 | (void *)pte - (void *)first_pte); | |
1722 | pte = NULL; | |
1723 | } | |
1724 | iov_pfn++; | |
1725 | pteval += VTD_PAGE_SIZE; | |
1726 | sg_res--; | |
1727 | if (!sg_res) | |
1728 | sg = sg_next(sg); | |
1729 | } | |
1730 | return 0; | |
1731 | } | |
1732 | ||
9051aa02 DW |
1733 | static inline int domain_sg_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1734 | struct scatterlist *sg, unsigned long nr_pages, | |
1735 | int prot) | |
ba395927 | 1736 | { |
9051aa02 DW |
1737 | return __domain_mapping(domain, iov_pfn, sg, 0, nr_pages, prot); |
1738 | } | |
6f6a00e4 | 1739 | |
9051aa02 DW |
1740 | static inline int domain_pfn_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1741 | unsigned long phys_pfn, unsigned long nr_pages, | |
1742 | int prot) | |
1743 | { | |
1744 | return __domain_mapping(domain, iov_pfn, NULL, phys_pfn, nr_pages, prot); | |
ba395927 KA |
1745 | } |
1746 | ||
c7151a8d | 1747 | static void iommu_detach_dev(struct intel_iommu *iommu, u8 bus, u8 devfn) |
ba395927 | 1748 | { |
c7151a8d WH |
1749 | if (!iommu) |
1750 | return; | |
8c11e798 WH |
1751 | |
1752 | clear_context_table(iommu, bus, devfn); | |
1753 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
4c25a2c1 | 1754 | DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 1755 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
ba395927 KA |
1756 | } |
1757 | ||
1758 | static void domain_remove_dev_info(struct dmar_domain *domain) | |
1759 | { | |
1760 | struct device_domain_info *info; | |
1761 | unsigned long flags; | |
c7151a8d | 1762 | struct intel_iommu *iommu; |
ba395927 KA |
1763 | |
1764 | spin_lock_irqsave(&device_domain_lock, flags); | |
1765 | while (!list_empty(&domain->devices)) { | |
1766 | info = list_entry(domain->devices.next, | |
1767 | struct device_domain_info, link); | |
1768 | list_del(&info->link); | |
1769 | list_del(&info->global); | |
1770 | if (info->dev) | |
358dd8ac | 1771 | info->dev->dev.archdata.iommu = NULL; |
ba395927 KA |
1772 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1773 | ||
93a23a72 | 1774 | iommu_disable_dev_iotlb(info); |
276dbf99 | 1775 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 1776 | iommu_detach_dev(iommu, info->bus, info->devfn); |
ba395927 KA |
1777 | free_devinfo_mem(info); |
1778 | ||
1779 | spin_lock_irqsave(&device_domain_lock, flags); | |
1780 | } | |
1781 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * find_domain | |
358dd8ac | 1786 | * Note: we use struct pci_dev->dev.archdata.iommu stores the info |
ba395927 | 1787 | */ |
38717946 | 1788 | static struct dmar_domain * |
ba395927 KA |
1789 | find_domain(struct pci_dev *pdev) |
1790 | { | |
1791 | struct device_domain_info *info; | |
1792 | ||
1793 | /* No lock here, assumes no domain exit in normal case */ | |
358dd8ac | 1794 | info = pdev->dev.archdata.iommu; |
ba395927 KA |
1795 | if (info) |
1796 | return info->domain; | |
1797 | return NULL; | |
1798 | } | |
1799 | ||
ba395927 KA |
1800 | /* domain is initialized */ |
1801 | static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) | |
1802 | { | |
1803 | struct dmar_domain *domain, *found = NULL; | |
1804 | struct intel_iommu *iommu; | |
1805 | struct dmar_drhd_unit *drhd; | |
1806 | struct device_domain_info *info, *tmp; | |
1807 | struct pci_dev *dev_tmp; | |
1808 | unsigned long flags; | |
1809 | int bus = 0, devfn = 0; | |
276dbf99 | 1810 | int segment; |
2c2e2c38 | 1811 | int ret; |
ba395927 KA |
1812 | |
1813 | domain = find_domain(pdev); | |
1814 | if (domain) | |
1815 | return domain; | |
1816 | ||
276dbf99 DW |
1817 | segment = pci_domain_nr(pdev->bus); |
1818 | ||
ba395927 KA |
1819 | dev_tmp = pci_find_upstream_pcie_bridge(pdev); |
1820 | if (dev_tmp) { | |
1821 | if (dev_tmp->is_pcie) { | |
1822 | bus = dev_tmp->subordinate->number; | |
1823 | devfn = 0; | |
1824 | } else { | |
1825 | bus = dev_tmp->bus->number; | |
1826 | devfn = dev_tmp->devfn; | |
1827 | } | |
1828 | spin_lock_irqsave(&device_domain_lock, flags); | |
1829 | list_for_each_entry(info, &device_domain_list, global) { | |
276dbf99 DW |
1830 | if (info->segment == segment && |
1831 | info->bus == bus && info->devfn == devfn) { | |
ba395927 KA |
1832 | found = info->domain; |
1833 | break; | |
1834 | } | |
1835 | } | |
1836 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1837 | /* pcie-pci bridge already has a domain, uses it */ | |
1838 | if (found) { | |
1839 | domain = found; | |
1840 | goto found_domain; | |
1841 | } | |
1842 | } | |
1843 | ||
2c2e2c38 FY |
1844 | domain = alloc_domain(); |
1845 | if (!domain) | |
1846 | goto error; | |
1847 | ||
ba395927 KA |
1848 | /* Allocate new domain for the device */ |
1849 | drhd = dmar_find_matched_drhd_unit(pdev); | |
1850 | if (!drhd) { | |
1851 | printk(KERN_ERR "IOMMU: can't find DMAR for device %s\n", | |
1852 | pci_name(pdev)); | |
1853 | return NULL; | |
1854 | } | |
1855 | iommu = drhd->iommu; | |
1856 | ||
2c2e2c38 FY |
1857 | ret = iommu_attach_domain(domain, iommu); |
1858 | if (ret) { | |
1859 | domain_exit(domain); | |
ba395927 | 1860 | goto error; |
2c2e2c38 | 1861 | } |
ba395927 KA |
1862 | |
1863 | if (domain_init(domain, gaw)) { | |
1864 | domain_exit(domain); | |
1865 | goto error; | |
1866 | } | |
1867 | ||
1868 | /* register pcie-to-pci device */ | |
1869 | if (dev_tmp) { | |
1870 | info = alloc_devinfo_mem(); | |
1871 | if (!info) { | |
1872 | domain_exit(domain); | |
1873 | goto error; | |
1874 | } | |
276dbf99 | 1875 | info->segment = segment; |
ba395927 KA |
1876 | info->bus = bus; |
1877 | info->devfn = devfn; | |
1878 | info->dev = NULL; | |
1879 | info->domain = domain; | |
1880 | /* This domain is shared by devices under p2p bridge */ | |
3b5410e7 | 1881 | domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; |
ba395927 KA |
1882 | |
1883 | /* pcie-to-pci bridge already has a domain, uses it */ | |
1884 | found = NULL; | |
1885 | spin_lock_irqsave(&device_domain_lock, flags); | |
1886 | list_for_each_entry(tmp, &device_domain_list, global) { | |
276dbf99 DW |
1887 | if (tmp->segment == segment && |
1888 | tmp->bus == bus && tmp->devfn == devfn) { | |
ba395927 KA |
1889 | found = tmp->domain; |
1890 | break; | |
1891 | } | |
1892 | } | |
1893 | if (found) { | |
1894 | free_devinfo_mem(info); | |
1895 | domain_exit(domain); | |
1896 | domain = found; | |
1897 | } else { | |
1898 | list_add(&info->link, &domain->devices); | |
1899 | list_add(&info->global, &device_domain_list); | |
1900 | } | |
1901 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1902 | } | |
1903 | ||
1904 | found_domain: | |
1905 | info = alloc_devinfo_mem(); | |
1906 | if (!info) | |
1907 | goto error; | |
276dbf99 | 1908 | info->segment = segment; |
ba395927 KA |
1909 | info->bus = pdev->bus->number; |
1910 | info->devfn = pdev->devfn; | |
1911 | info->dev = pdev; | |
1912 | info->domain = domain; | |
1913 | spin_lock_irqsave(&device_domain_lock, flags); | |
1914 | /* somebody is fast */ | |
1915 | found = find_domain(pdev); | |
1916 | if (found != NULL) { | |
1917 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1918 | if (found != domain) { | |
1919 | domain_exit(domain); | |
1920 | domain = found; | |
1921 | } | |
1922 | free_devinfo_mem(info); | |
1923 | return domain; | |
1924 | } | |
1925 | list_add(&info->link, &domain->devices); | |
1926 | list_add(&info->global, &device_domain_list); | |
358dd8ac | 1927 | pdev->dev.archdata.iommu = info; |
ba395927 KA |
1928 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1929 | return domain; | |
1930 | error: | |
1931 | /* recheck it here, maybe others set it */ | |
1932 | return find_domain(pdev); | |
1933 | } | |
1934 | ||
2c2e2c38 FY |
1935 | static int iommu_identity_mapping; |
1936 | ||
b213203e DW |
1937 | static int iommu_domain_identity_map(struct dmar_domain *domain, |
1938 | unsigned long long start, | |
1939 | unsigned long long end) | |
ba395927 | 1940 | { |
c5395d5c DW |
1941 | unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; |
1942 | unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; | |
1943 | ||
1944 | if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), | |
1945 | dma_to_mm_pfn(last_vpfn))) { | |
ba395927 | 1946 | printk(KERN_ERR "IOMMU: reserve iova failed\n"); |
b213203e | 1947 | return -ENOMEM; |
ba395927 KA |
1948 | } |
1949 | ||
c5395d5c DW |
1950 | pr_debug("Mapping reserved region %llx-%llx for domain %d\n", |
1951 | start, end, domain->id); | |
ba395927 KA |
1952 | /* |
1953 | * RMRR range might have overlap with physical memory range, | |
1954 | * clear it first | |
1955 | */ | |
c5395d5c | 1956 | dma_pte_clear_range(domain, first_vpfn, last_vpfn); |
ba395927 | 1957 | |
c5395d5c DW |
1958 | return domain_pfn_mapping(domain, first_vpfn, first_vpfn, |
1959 | last_vpfn - first_vpfn + 1, | |
61df7443 | 1960 | DMA_PTE_READ|DMA_PTE_WRITE); |
b213203e DW |
1961 | } |
1962 | ||
1963 | static int iommu_prepare_identity_map(struct pci_dev *pdev, | |
1964 | unsigned long long start, | |
1965 | unsigned long long end) | |
1966 | { | |
1967 | struct dmar_domain *domain; | |
1968 | int ret; | |
1969 | ||
c7ab48d2 | 1970 | domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH); |
b213203e DW |
1971 | if (!domain) |
1972 | return -ENOMEM; | |
1973 | ||
19943b0e DW |
1974 | /* For _hardware_ passthrough, don't bother. But for software |
1975 | passthrough, we do it anyway -- it may indicate a memory | |
1976 | range which is reserved in E820, so which didn't get set | |
1977 | up to start with in si_domain */ | |
1978 | if (domain == si_domain && hw_pass_through) { | |
1979 | printk("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", | |
1980 | pci_name(pdev), start, end); | |
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | printk(KERN_INFO | |
1985 | "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n", | |
1986 | pci_name(pdev), start, end); | |
2ff729f5 DW |
1987 | |
1988 | if (end >> agaw_to_width(domain->agaw)) { | |
1989 | WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n" | |
1990 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
1991 | agaw_to_width(domain->agaw), | |
1992 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
1993 | dmi_get_system_info(DMI_BIOS_VERSION), | |
1994 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
1995 | ret = -EIO; | |
1996 | goto error; | |
1997 | } | |
19943b0e | 1998 | |
b213203e | 1999 | ret = iommu_domain_identity_map(domain, start, end); |
ba395927 KA |
2000 | if (ret) |
2001 | goto error; | |
2002 | ||
2003 | /* context entry init */ | |
4ed0d3e6 | 2004 | ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
b213203e DW |
2005 | if (ret) |
2006 | goto error; | |
2007 | ||
2008 | return 0; | |
2009 | ||
2010 | error: | |
ba395927 KA |
2011 | domain_exit(domain); |
2012 | return ret; | |
ba395927 KA |
2013 | } |
2014 | ||
2015 | static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, | |
2016 | struct pci_dev *pdev) | |
2017 | { | |
358dd8ac | 2018 | if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) |
ba395927 KA |
2019 | return 0; |
2020 | return iommu_prepare_identity_map(pdev, rmrr->base_address, | |
2021 | rmrr->end_address + 1); | |
2022 | } | |
2023 | ||
49a0429e KA |
2024 | #ifdef CONFIG_DMAR_FLOPPY_WA |
2025 | static inline void iommu_prepare_isa(void) | |
2026 | { | |
2027 | struct pci_dev *pdev; | |
2028 | int ret; | |
2029 | ||
2030 | pdev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); | |
2031 | if (!pdev) | |
2032 | return; | |
2033 | ||
c7ab48d2 | 2034 | printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n"); |
49a0429e KA |
2035 | ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024); |
2036 | ||
2037 | if (ret) | |
c7ab48d2 DW |
2038 | printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; " |
2039 | "floppy might not work\n"); | |
49a0429e KA |
2040 | |
2041 | } | |
2042 | #else | |
2043 | static inline void iommu_prepare_isa(void) | |
2044 | { | |
2045 | return; | |
2046 | } | |
2047 | #endif /* !CONFIG_DMAR_FLPY_WA */ | |
2048 | ||
2c2e2c38 | 2049 | static int md_domain_init(struct dmar_domain *domain, int guest_width); |
c7ab48d2 DW |
2050 | |
2051 | static int __init si_domain_work_fn(unsigned long start_pfn, | |
2052 | unsigned long end_pfn, void *datax) | |
2053 | { | |
2054 | int *ret = datax; | |
2055 | ||
2056 | *ret = iommu_domain_identity_map(si_domain, | |
2057 | (uint64_t)start_pfn << PAGE_SHIFT, | |
2058 | (uint64_t)end_pfn << PAGE_SHIFT); | |
2059 | return *ret; | |
2060 | ||
2061 | } | |
2062 | ||
071e1374 | 2063 | static int __init si_domain_init(int hw) |
2c2e2c38 FY |
2064 | { |
2065 | struct dmar_drhd_unit *drhd; | |
2066 | struct intel_iommu *iommu; | |
c7ab48d2 | 2067 | int nid, ret = 0; |
2c2e2c38 FY |
2068 | |
2069 | si_domain = alloc_domain(); | |
2070 | if (!si_domain) | |
2071 | return -EFAULT; | |
2072 | ||
c7ab48d2 | 2073 | pr_debug("Identity mapping domain is domain %d\n", si_domain->id); |
2c2e2c38 FY |
2074 | |
2075 | for_each_active_iommu(iommu, drhd) { | |
2076 | ret = iommu_attach_domain(si_domain, iommu); | |
2077 | if (ret) { | |
2078 | domain_exit(si_domain); | |
2079 | return -EFAULT; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { | |
2084 | domain_exit(si_domain); | |
2085 | return -EFAULT; | |
2086 | } | |
2087 | ||
2088 | si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; | |
2089 | ||
19943b0e DW |
2090 | if (hw) |
2091 | return 0; | |
2092 | ||
c7ab48d2 DW |
2093 | for_each_online_node(nid) { |
2094 | work_with_active_regions(nid, si_domain_work_fn, &ret); | |
2095 | if (ret) | |
2096 | return ret; | |
2097 | } | |
2098 | ||
2c2e2c38 FY |
2099 | return 0; |
2100 | } | |
2101 | ||
2102 | static void domain_remove_one_dev_info(struct dmar_domain *domain, | |
2103 | struct pci_dev *pdev); | |
2104 | static int identity_mapping(struct pci_dev *pdev) | |
2105 | { | |
2106 | struct device_domain_info *info; | |
2107 | ||
2108 | if (likely(!iommu_identity_mapping)) | |
2109 | return 0; | |
2110 | ||
2111 | ||
2112 | list_for_each_entry(info, &si_domain->devices, link) | |
2113 | if (info->dev == pdev) | |
2114 | return 1; | |
2115 | return 0; | |
2116 | } | |
2117 | ||
2118 | static int domain_add_dev_info(struct dmar_domain *domain, | |
5fe60f4e DW |
2119 | struct pci_dev *pdev, |
2120 | int translation) | |
2c2e2c38 FY |
2121 | { |
2122 | struct device_domain_info *info; | |
2123 | unsigned long flags; | |
5fe60f4e | 2124 | int ret; |
2c2e2c38 FY |
2125 | |
2126 | info = alloc_devinfo_mem(); | |
2127 | if (!info) | |
2128 | return -ENOMEM; | |
2129 | ||
5fe60f4e DW |
2130 | ret = domain_context_mapping(domain, pdev, translation); |
2131 | if (ret) { | |
2132 | free_devinfo_mem(info); | |
2133 | return ret; | |
2134 | } | |
2135 | ||
2c2e2c38 FY |
2136 | info->segment = pci_domain_nr(pdev->bus); |
2137 | info->bus = pdev->bus->number; | |
2138 | info->devfn = pdev->devfn; | |
2139 | info->dev = pdev; | |
2140 | info->domain = domain; | |
2141 | ||
2142 | spin_lock_irqsave(&device_domain_lock, flags); | |
2143 | list_add(&info->link, &domain->devices); | |
2144 | list_add(&info->global, &device_domain_list); | |
2145 | pdev->dev.archdata.iommu = info; | |
2146 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2147 | ||
2148 | return 0; | |
2149 | } | |
2150 | ||
6941af28 DW |
2151 | static int iommu_should_identity_map(struct pci_dev *pdev, int startup) |
2152 | { | |
2153 | if (iommu_identity_mapping == 2) | |
2154 | return IS_GFX_DEVICE(pdev); | |
2155 | ||
3dfc813d DW |
2156 | /* |
2157 | * We want to start off with all devices in the 1:1 domain, and | |
2158 | * take them out later if we find they can't access all of memory. | |
2159 | * | |
2160 | * However, we can't do this for PCI devices behind bridges, | |
2161 | * because all PCI devices behind the same bridge will end up | |
2162 | * with the same source-id on their transactions. | |
2163 | * | |
2164 | * Practically speaking, we can't change things around for these | |
2165 | * devices at run-time, because we can't be sure there'll be no | |
2166 | * DMA transactions in flight for any of their siblings. | |
2167 | * | |
2168 | * So PCI devices (unless they're on the root bus) as well as | |
2169 | * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of | |
2170 | * the 1:1 domain, just in _case_ one of their siblings turns out | |
2171 | * not to be able to map all of memory. | |
2172 | */ | |
2173 | if (!pdev->is_pcie) { | |
2174 | if (!pci_is_root_bus(pdev->bus)) | |
2175 | return 0; | |
2176 | if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) | |
2177 | return 0; | |
2178 | } else if (pdev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
2179 | return 0; | |
2180 | ||
2181 | /* | |
2182 | * At boot time, we don't yet know if devices will be 64-bit capable. | |
2183 | * Assume that they will -- if they turn out not to be, then we can | |
2184 | * take them out of the 1:1 domain later. | |
2185 | */ | |
6941af28 DW |
2186 | if (!startup) |
2187 | return pdev->dma_mask > DMA_BIT_MASK(32); | |
2188 | ||
2189 | return 1; | |
2190 | } | |
2191 | ||
071e1374 | 2192 | static int __init iommu_prepare_static_identity_mapping(int hw) |
2c2e2c38 | 2193 | { |
2c2e2c38 FY |
2194 | struct pci_dev *pdev = NULL; |
2195 | int ret; | |
2196 | ||
19943b0e | 2197 | ret = si_domain_init(hw); |
2c2e2c38 FY |
2198 | if (ret) |
2199 | return -EFAULT; | |
2200 | ||
2c2e2c38 | 2201 | for_each_pci_dev(pdev) { |
6941af28 | 2202 | if (iommu_should_identity_map(pdev, 1)) { |
19943b0e DW |
2203 | printk(KERN_INFO "IOMMU: %s identity mapping for device %s\n", |
2204 | hw ? "hardware" : "software", pci_name(pdev)); | |
62edf5dc | 2205 | |
5fe60f4e | 2206 | ret = domain_add_dev_info(si_domain, pdev, |
19943b0e | 2207 | hw ? CONTEXT_TT_PASS_THROUGH : |
62edf5dc DW |
2208 | CONTEXT_TT_MULTI_LEVEL); |
2209 | if (ret) | |
2210 | return ret; | |
62edf5dc | 2211 | } |
2c2e2c38 FY |
2212 | } |
2213 | ||
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | int __init init_dmars(void) | |
ba395927 KA |
2218 | { |
2219 | struct dmar_drhd_unit *drhd; | |
2220 | struct dmar_rmrr_unit *rmrr; | |
2221 | struct pci_dev *pdev; | |
2222 | struct intel_iommu *iommu; | |
9d783ba0 | 2223 | int i, ret; |
2c2e2c38 | 2224 | |
ba395927 KA |
2225 | /* |
2226 | * for each drhd | |
2227 | * allocate root | |
2228 | * initialize and program root entry to not present | |
2229 | * endfor | |
2230 | */ | |
2231 | for_each_drhd_unit(drhd) { | |
5e0d2a6f | 2232 | g_num_of_iommus++; |
2233 | /* | |
2234 | * lock not needed as this is only incremented in the single | |
2235 | * threaded kernel __init code path all other access are read | |
2236 | * only | |
2237 | */ | |
2238 | } | |
2239 | ||
d9630fe9 WH |
2240 | g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), |
2241 | GFP_KERNEL); | |
2242 | if (!g_iommus) { | |
2243 | printk(KERN_ERR "Allocating global iommu array failed\n"); | |
2244 | ret = -ENOMEM; | |
2245 | goto error; | |
2246 | } | |
2247 | ||
80b20dd8 | 2248 | deferred_flush = kzalloc(g_num_of_iommus * |
2249 | sizeof(struct deferred_flush_tables), GFP_KERNEL); | |
2250 | if (!deferred_flush) { | |
5e0d2a6f | 2251 | ret = -ENOMEM; |
2252 | goto error; | |
2253 | } | |
2254 | ||
5e0d2a6f | 2255 | for_each_drhd_unit(drhd) { |
2256 | if (drhd->ignored) | |
2257 | continue; | |
1886e8a9 SS |
2258 | |
2259 | iommu = drhd->iommu; | |
d9630fe9 | 2260 | g_iommus[iommu->seq_id] = iommu; |
ba395927 | 2261 | |
e61d98d8 SS |
2262 | ret = iommu_init_domains(iommu); |
2263 | if (ret) | |
2264 | goto error; | |
2265 | ||
ba395927 KA |
2266 | /* |
2267 | * TBD: | |
2268 | * we could share the same root & context tables | |
2269 | * amoung all IOMMU's. Need to Split it later. | |
2270 | */ | |
2271 | ret = iommu_alloc_root_entry(iommu); | |
2272 | if (ret) { | |
2273 | printk(KERN_ERR "IOMMU: allocate root entry failed\n"); | |
2274 | goto error; | |
2275 | } | |
4ed0d3e6 | 2276 | if (!ecap_pass_through(iommu->ecap)) |
19943b0e | 2277 | hw_pass_through = 0; |
ba395927 KA |
2278 | } |
2279 | ||
1531a6a6 SS |
2280 | /* |
2281 | * Start from the sane iommu hardware state. | |
2282 | */ | |
a77b67d4 YS |
2283 | for_each_drhd_unit(drhd) { |
2284 | if (drhd->ignored) | |
2285 | continue; | |
2286 | ||
2287 | iommu = drhd->iommu; | |
1531a6a6 SS |
2288 | |
2289 | /* | |
2290 | * If the queued invalidation is already initialized by us | |
2291 | * (for example, while enabling interrupt-remapping) then | |
2292 | * we got the things already rolling from a sane state. | |
2293 | */ | |
2294 | if (iommu->qi) | |
2295 | continue; | |
2296 | ||
2297 | /* | |
2298 | * Clear any previous faults. | |
2299 | */ | |
2300 | dmar_fault(-1, iommu); | |
2301 | /* | |
2302 | * Disable queued invalidation if supported and already enabled | |
2303 | * before OS handover. | |
2304 | */ | |
2305 | dmar_disable_qi(iommu); | |
2306 | } | |
2307 | ||
2308 | for_each_drhd_unit(drhd) { | |
2309 | if (drhd->ignored) | |
2310 | continue; | |
2311 | ||
2312 | iommu = drhd->iommu; | |
2313 | ||
a77b67d4 YS |
2314 | if (dmar_enable_qi(iommu)) { |
2315 | /* | |
2316 | * Queued Invalidate not enabled, use Register Based | |
2317 | * Invalidate | |
2318 | */ | |
2319 | iommu->flush.flush_context = __iommu_flush_context; | |
2320 | iommu->flush.flush_iotlb = __iommu_flush_iotlb; | |
2321 | printk(KERN_INFO "IOMMU 0x%Lx: using Register based " | |
b4e0f9eb FT |
2322 | "invalidation\n", |
2323 | (unsigned long long)drhd->reg_base_addr); | |
a77b67d4 YS |
2324 | } else { |
2325 | iommu->flush.flush_context = qi_flush_context; | |
2326 | iommu->flush.flush_iotlb = qi_flush_iotlb; | |
2327 | printk(KERN_INFO "IOMMU 0x%Lx: using Queued " | |
b4e0f9eb FT |
2328 | "invalidation\n", |
2329 | (unsigned long long)drhd->reg_base_addr); | |
a77b67d4 YS |
2330 | } |
2331 | } | |
2332 | ||
19943b0e DW |
2333 | if (iommu_pass_through) |
2334 | iommu_identity_mapping = 1; | |
2335 | #ifdef CONFIG_DMAR_BROKEN_GFX_WA | |
2336 | else | |
2337 | iommu_identity_mapping = 2; | |
2338 | #endif | |
ba395927 | 2339 | /* |
19943b0e DW |
2340 | * If pass through is not set or not enabled, setup context entries for |
2341 | * identity mappings for rmrr, gfx, and isa and may fall back to static | |
2342 | * identity mapping if iommu_identity_mapping is set. | |
ba395927 | 2343 | */ |
19943b0e DW |
2344 | if (iommu_identity_mapping) { |
2345 | ret = iommu_prepare_static_identity_mapping(hw_pass_through); | |
4ed0d3e6 | 2346 | if (ret) { |
19943b0e DW |
2347 | printk(KERN_CRIT "Failed to setup IOMMU pass-through\n"); |
2348 | goto error; | |
ba395927 KA |
2349 | } |
2350 | } | |
ba395927 | 2351 | /* |
19943b0e DW |
2352 | * For each rmrr |
2353 | * for each dev attached to rmrr | |
2354 | * do | |
2355 | * locate drhd for dev, alloc domain for dev | |
2356 | * allocate free domain | |
2357 | * allocate page table entries for rmrr | |
2358 | * if context not allocated for bus | |
2359 | * allocate and init context | |
2360 | * set present in root table for this bus | |
2361 | * init context with domain, translation etc | |
2362 | * endfor | |
2363 | * endfor | |
ba395927 | 2364 | */ |
19943b0e DW |
2365 | printk(KERN_INFO "IOMMU: Setting RMRR:\n"); |
2366 | for_each_rmrr_units(rmrr) { | |
2367 | for (i = 0; i < rmrr->devices_cnt; i++) { | |
2368 | pdev = rmrr->devices[i]; | |
2369 | /* | |
2370 | * some BIOS lists non-exist devices in DMAR | |
2371 | * table. | |
2372 | */ | |
2373 | if (!pdev) | |
2374 | continue; | |
2375 | ret = iommu_prepare_rmrr_dev(rmrr, pdev); | |
2376 | if (ret) | |
2377 | printk(KERN_ERR | |
2378 | "IOMMU: mapping reserved region failed\n"); | |
ba395927 | 2379 | } |
4ed0d3e6 | 2380 | } |
49a0429e | 2381 | |
19943b0e DW |
2382 | iommu_prepare_isa(); |
2383 | ||
ba395927 KA |
2384 | /* |
2385 | * for each drhd | |
2386 | * enable fault log | |
2387 | * global invalidate context cache | |
2388 | * global invalidate iotlb | |
2389 | * enable translation | |
2390 | */ | |
2391 | for_each_drhd_unit(drhd) { | |
2392 | if (drhd->ignored) | |
2393 | continue; | |
2394 | iommu = drhd->iommu; | |
ba395927 KA |
2395 | |
2396 | iommu_flush_write_buffer(iommu); | |
2397 | ||
3460a6d9 KA |
2398 | ret = dmar_set_interrupt(iommu); |
2399 | if (ret) | |
2400 | goto error; | |
2401 | ||
ba395927 KA |
2402 | iommu_set_root_entry(iommu); |
2403 | ||
4c25a2c1 | 2404 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 2405 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
f8bab735 | 2406 | |
ba395927 KA |
2407 | ret = iommu_enable_translation(iommu); |
2408 | if (ret) | |
2409 | goto error; | |
b94996c9 DW |
2410 | |
2411 | iommu_disable_protect_mem_regions(iommu); | |
ba395927 KA |
2412 | } |
2413 | ||
2414 | return 0; | |
2415 | error: | |
2416 | for_each_drhd_unit(drhd) { | |
2417 | if (drhd->ignored) | |
2418 | continue; | |
2419 | iommu = drhd->iommu; | |
2420 | free_iommu(iommu); | |
2421 | } | |
d9630fe9 | 2422 | kfree(g_iommus); |
ba395927 KA |
2423 | return ret; |
2424 | } | |
2425 | ||
5a5e02a6 | 2426 | /* This takes a number of _MM_ pages, not VTD pages */ |
875764de DW |
2427 | static struct iova *intel_alloc_iova(struct device *dev, |
2428 | struct dmar_domain *domain, | |
2429 | unsigned long nrpages, uint64_t dma_mask) | |
ba395927 | 2430 | { |
ba395927 | 2431 | struct pci_dev *pdev = to_pci_dev(dev); |
ba395927 | 2432 | struct iova *iova = NULL; |
ba395927 | 2433 | |
875764de DW |
2434 | /* Restrict dma_mask to the width that the iommu can handle */ |
2435 | dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask); | |
2436 | ||
2437 | if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) { | |
ba395927 KA |
2438 | /* |
2439 | * First try to allocate an io virtual address in | |
284901a9 | 2440 | * DMA_BIT_MASK(32) and if that fails then try allocating |
3609801e | 2441 | * from higher range |
ba395927 | 2442 | */ |
875764de DW |
2443 | iova = alloc_iova(&domain->iovad, nrpages, |
2444 | IOVA_PFN(DMA_BIT_MASK(32)), 1); | |
2445 | if (iova) | |
2446 | return iova; | |
2447 | } | |
2448 | iova = alloc_iova(&domain->iovad, nrpages, IOVA_PFN(dma_mask), 1); | |
2449 | if (unlikely(!iova)) { | |
2450 | printk(KERN_ERR "Allocating %ld-page iova for %s failed", | |
2451 | nrpages, pci_name(pdev)); | |
f76aec76 KA |
2452 | return NULL; |
2453 | } | |
2454 | ||
2455 | return iova; | |
2456 | } | |
2457 | ||
147202aa | 2458 | static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) |
f76aec76 KA |
2459 | { |
2460 | struct dmar_domain *domain; | |
2461 | int ret; | |
2462 | ||
2463 | domain = get_domain_for_dev(pdev, | |
2464 | DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
2465 | if (!domain) { | |
2466 | printk(KERN_ERR | |
2467 | "Allocating domain for %s failed", pci_name(pdev)); | |
4fe05bbc | 2468 | return NULL; |
ba395927 KA |
2469 | } |
2470 | ||
2471 | /* make sure context mapping is ok */ | |
5331fe6f | 2472 | if (unlikely(!domain_context_mapped(pdev))) { |
4ed0d3e6 FY |
2473 | ret = domain_context_mapping(domain, pdev, |
2474 | CONTEXT_TT_MULTI_LEVEL); | |
f76aec76 KA |
2475 | if (ret) { |
2476 | printk(KERN_ERR | |
2477 | "Domain context map for %s failed", | |
2478 | pci_name(pdev)); | |
4fe05bbc | 2479 | return NULL; |
f76aec76 | 2480 | } |
ba395927 KA |
2481 | } |
2482 | ||
f76aec76 KA |
2483 | return domain; |
2484 | } | |
2485 | ||
147202aa DW |
2486 | static inline struct dmar_domain *get_valid_domain_for_dev(struct pci_dev *dev) |
2487 | { | |
2488 | struct device_domain_info *info; | |
2489 | ||
2490 | /* No lock here, assumes no domain exit in normal case */ | |
2491 | info = dev->dev.archdata.iommu; | |
2492 | if (likely(info)) | |
2493 | return info->domain; | |
2494 | ||
2495 | return __get_valid_domain_for_dev(dev); | |
2496 | } | |
2497 | ||
2c2e2c38 FY |
2498 | static int iommu_dummy(struct pci_dev *pdev) |
2499 | { | |
2500 | return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; | |
2501 | } | |
2502 | ||
2503 | /* Check if the pdev needs to go through non-identity map and unmap process.*/ | |
73676832 | 2504 | static int iommu_no_mapping(struct device *dev) |
2c2e2c38 | 2505 | { |
73676832 | 2506 | struct pci_dev *pdev; |
2c2e2c38 FY |
2507 | int found; |
2508 | ||
73676832 DW |
2509 | if (unlikely(dev->bus != &pci_bus_type)) |
2510 | return 1; | |
2511 | ||
2512 | pdev = to_pci_dev(dev); | |
1e4c64c4 DW |
2513 | if (iommu_dummy(pdev)) |
2514 | return 1; | |
2515 | ||
2c2e2c38 | 2516 | if (!iommu_identity_mapping) |
1e4c64c4 | 2517 | return 0; |
2c2e2c38 FY |
2518 | |
2519 | found = identity_mapping(pdev); | |
2520 | if (found) { | |
6941af28 | 2521 | if (iommu_should_identity_map(pdev, 0)) |
2c2e2c38 FY |
2522 | return 1; |
2523 | else { | |
2524 | /* | |
2525 | * 32 bit DMA is removed from si_domain and fall back | |
2526 | * to non-identity mapping. | |
2527 | */ | |
2528 | domain_remove_one_dev_info(si_domain, pdev); | |
2529 | printk(KERN_INFO "32bit %s uses non-identity mapping\n", | |
2530 | pci_name(pdev)); | |
2531 | return 0; | |
2532 | } | |
2533 | } else { | |
2534 | /* | |
2535 | * In case of a detached 64 bit DMA device from vm, the device | |
2536 | * is put into si_domain for identity mapping. | |
2537 | */ | |
6941af28 | 2538 | if (iommu_should_identity_map(pdev, 0)) { |
2c2e2c38 | 2539 | int ret; |
5fe60f4e DW |
2540 | ret = domain_add_dev_info(si_domain, pdev, |
2541 | hw_pass_through ? | |
2542 | CONTEXT_TT_PASS_THROUGH : | |
2543 | CONTEXT_TT_MULTI_LEVEL); | |
2c2e2c38 FY |
2544 | if (!ret) { |
2545 | printk(KERN_INFO "64bit %s uses identity mapping\n", | |
2546 | pci_name(pdev)); | |
2547 | return 1; | |
2548 | } | |
2549 | } | |
2550 | } | |
2551 | ||
1e4c64c4 | 2552 | return 0; |
2c2e2c38 FY |
2553 | } |
2554 | ||
bb9e6d65 FT |
2555 | static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, |
2556 | size_t size, int dir, u64 dma_mask) | |
f76aec76 KA |
2557 | { |
2558 | struct pci_dev *pdev = to_pci_dev(hwdev); | |
f76aec76 | 2559 | struct dmar_domain *domain; |
5b6985ce | 2560 | phys_addr_t start_paddr; |
f76aec76 KA |
2561 | struct iova *iova; |
2562 | int prot = 0; | |
6865f0d1 | 2563 | int ret; |
8c11e798 | 2564 | struct intel_iommu *iommu; |
33041ec0 | 2565 | unsigned long paddr_pfn = paddr >> PAGE_SHIFT; |
f76aec76 KA |
2566 | |
2567 | BUG_ON(dir == DMA_NONE); | |
2c2e2c38 | 2568 | |
73676832 | 2569 | if (iommu_no_mapping(hwdev)) |
6865f0d1 | 2570 | return paddr; |
f76aec76 KA |
2571 | |
2572 | domain = get_valid_domain_for_dev(pdev); | |
2573 | if (!domain) | |
2574 | return 0; | |
2575 | ||
8c11e798 | 2576 | iommu = domain_get_iommu(domain); |
88cb6a74 | 2577 | size = aligned_nrpages(paddr, size); |
f76aec76 | 2578 | |
5a5e02a6 DW |
2579 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
2580 | pdev->dma_mask); | |
f76aec76 KA |
2581 | if (!iova) |
2582 | goto error; | |
2583 | ||
ba395927 KA |
2584 | /* |
2585 | * Check if DMAR supports zero-length reads on write only | |
2586 | * mappings.. | |
2587 | */ | |
2588 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2589 | !cap_zlr(iommu->cap)) |
ba395927 KA |
2590 | prot |= DMA_PTE_READ; |
2591 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2592 | prot |= DMA_PTE_WRITE; | |
2593 | /* | |
6865f0d1 | 2594 | * paddr - (paddr + size) might be partial page, we should map the whole |
ba395927 | 2595 | * page. Note: if two part of one page are separately mapped, we |
6865f0d1 | 2596 | * might have two guest_addr mapping to the same host paddr, but this |
ba395927 KA |
2597 | * is not a big problem |
2598 | */ | |
0ab36de2 | 2599 | ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo), |
33041ec0 | 2600 | mm_to_dma_pfn(paddr_pfn), size, prot); |
ba395927 KA |
2601 | if (ret) |
2602 | goto error; | |
2603 | ||
1f0ef2aa DW |
2604 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2605 | if (cap_caching_mode(iommu->cap)) | |
03d6a246 | 2606 | iommu_flush_iotlb_psi(iommu, 0, mm_to_dma_pfn(iova->pfn_lo), size); |
1f0ef2aa | 2607 | else |
8c11e798 | 2608 | iommu_flush_write_buffer(iommu); |
f76aec76 | 2609 | |
03d6a246 DW |
2610 | start_paddr = (phys_addr_t)iova->pfn_lo << PAGE_SHIFT; |
2611 | start_paddr += paddr & ~PAGE_MASK; | |
2612 | return start_paddr; | |
ba395927 | 2613 | |
ba395927 | 2614 | error: |
f76aec76 KA |
2615 | if (iova) |
2616 | __free_iova(&domain->iovad, iova); | |
4cf2e75d | 2617 | printk(KERN_ERR"Device %s request: %zx@%llx dir %d --- failed\n", |
5b6985ce | 2618 | pci_name(pdev), size, (unsigned long long)paddr, dir); |
ba395927 KA |
2619 | return 0; |
2620 | } | |
2621 | ||
ffbbef5c FT |
2622 | static dma_addr_t intel_map_page(struct device *dev, struct page *page, |
2623 | unsigned long offset, size_t size, | |
2624 | enum dma_data_direction dir, | |
2625 | struct dma_attrs *attrs) | |
bb9e6d65 | 2626 | { |
ffbbef5c FT |
2627 | return __intel_map_single(dev, page_to_phys(page) + offset, size, |
2628 | dir, to_pci_dev(dev)->dma_mask); | |
bb9e6d65 FT |
2629 | } |
2630 | ||
5e0d2a6f | 2631 | static void flush_unmaps(void) |
2632 | { | |
80b20dd8 | 2633 | int i, j; |
5e0d2a6f | 2634 | |
5e0d2a6f | 2635 | timer_on = 0; |
2636 | ||
2637 | /* just flush them all */ | |
2638 | for (i = 0; i < g_num_of_iommus; i++) { | |
a2bb8459 WH |
2639 | struct intel_iommu *iommu = g_iommus[i]; |
2640 | if (!iommu) | |
2641 | continue; | |
c42d9f32 | 2642 | |
9dd2fe89 YZ |
2643 | if (!deferred_flush[i].next) |
2644 | continue; | |
2645 | ||
2646 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, | |
93a23a72 | 2647 | DMA_TLB_GLOBAL_FLUSH); |
9dd2fe89 | 2648 | for (j = 0; j < deferred_flush[i].next; j++) { |
93a23a72 YZ |
2649 | unsigned long mask; |
2650 | struct iova *iova = deferred_flush[i].iova[j]; | |
2651 | ||
64de5af0 | 2652 | mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1)); |
93a23a72 | 2653 | iommu_flush_dev_iotlb(deferred_flush[i].domain[j], |
64de5af0 | 2654 | (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); |
93a23a72 | 2655 | __free_iova(&deferred_flush[i].domain[j]->iovad, iova); |
80b20dd8 | 2656 | } |
9dd2fe89 | 2657 | deferred_flush[i].next = 0; |
5e0d2a6f | 2658 | } |
2659 | ||
5e0d2a6f | 2660 | list_size = 0; |
5e0d2a6f | 2661 | } |
2662 | ||
2663 | static void flush_unmaps_timeout(unsigned long data) | |
2664 | { | |
80b20dd8 | 2665 | unsigned long flags; |
2666 | ||
2667 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
5e0d2a6f | 2668 | flush_unmaps(); |
80b20dd8 | 2669 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); |
5e0d2a6f | 2670 | } |
2671 | ||
2672 | static void add_unmap(struct dmar_domain *dom, struct iova *iova) | |
2673 | { | |
2674 | unsigned long flags; | |
80b20dd8 | 2675 | int next, iommu_id; |
8c11e798 | 2676 | struct intel_iommu *iommu; |
5e0d2a6f | 2677 | |
2678 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
80b20dd8 | 2679 | if (list_size == HIGH_WATER_MARK) |
2680 | flush_unmaps(); | |
2681 | ||
8c11e798 WH |
2682 | iommu = domain_get_iommu(dom); |
2683 | iommu_id = iommu->seq_id; | |
c42d9f32 | 2684 | |
80b20dd8 | 2685 | next = deferred_flush[iommu_id].next; |
2686 | deferred_flush[iommu_id].domain[next] = dom; | |
2687 | deferred_flush[iommu_id].iova[next] = iova; | |
2688 | deferred_flush[iommu_id].next++; | |
5e0d2a6f | 2689 | |
2690 | if (!timer_on) { | |
2691 | mod_timer(&unmap_timer, jiffies + msecs_to_jiffies(10)); | |
2692 | timer_on = 1; | |
2693 | } | |
2694 | list_size++; | |
2695 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); | |
2696 | } | |
2697 | ||
ffbbef5c FT |
2698 | static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, |
2699 | size_t size, enum dma_data_direction dir, | |
2700 | struct dma_attrs *attrs) | |
ba395927 | 2701 | { |
ba395927 | 2702 | struct pci_dev *pdev = to_pci_dev(dev); |
f76aec76 | 2703 | struct dmar_domain *domain; |
d794dc9b | 2704 | unsigned long start_pfn, last_pfn; |
ba395927 | 2705 | struct iova *iova; |
8c11e798 | 2706 | struct intel_iommu *iommu; |
ba395927 | 2707 | |
73676832 | 2708 | if (iommu_no_mapping(dev)) |
f76aec76 | 2709 | return; |
2c2e2c38 | 2710 | |
ba395927 KA |
2711 | domain = find_domain(pdev); |
2712 | BUG_ON(!domain); | |
2713 | ||
8c11e798 WH |
2714 | iommu = domain_get_iommu(domain); |
2715 | ||
ba395927 | 2716 | iova = find_iova(&domain->iovad, IOVA_PFN(dev_addr)); |
85b98276 DW |
2717 | if (WARN_ONCE(!iova, "Driver unmaps unmatched page at PFN %llx\n", |
2718 | (unsigned long long)dev_addr)) | |
ba395927 | 2719 | return; |
ba395927 | 2720 | |
d794dc9b DW |
2721 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2722 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
ba395927 | 2723 | |
d794dc9b DW |
2724 | pr_debug("Device %s unmapping: pfn %lx-%lx\n", |
2725 | pci_name(pdev), start_pfn, last_pfn); | |
ba395927 | 2726 | |
f76aec76 | 2727 | /* clear the whole page */ |
d794dc9b DW |
2728 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2729 | ||
f76aec76 | 2730 | /* free page tables */ |
d794dc9b DW |
2731 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
2732 | ||
5e0d2a6f | 2733 | if (intel_iommu_strict) { |
03d6a246 | 2734 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, |
d794dc9b | 2735 | last_pfn - start_pfn + 1); |
5e0d2a6f | 2736 | /* free iova */ |
2737 | __free_iova(&domain->iovad, iova); | |
2738 | } else { | |
2739 | add_unmap(domain, iova); | |
2740 | /* | |
2741 | * queue up the release of the unmap to save the 1/6th of the | |
2742 | * cpu used up by the iotlb flush operation... | |
2743 | */ | |
5e0d2a6f | 2744 | } |
ba395927 KA |
2745 | } |
2746 | ||
d7ab5c46 FT |
2747 | static void *intel_alloc_coherent(struct device *hwdev, size_t size, |
2748 | dma_addr_t *dma_handle, gfp_t flags) | |
ba395927 KA |
2749 | { |
2750 | void *vaddr; | |
2751 | int order; | |
2752 | ||
5b6985ce | 2753 | size = PAGE_ALIGN(size); |
ba395927 KA |
2754 | order = get_order(size); |
2755 | flags &= ~(GFP_DMA | GFP_DMA32); | |
2756 | ||
2757 | vaddr = (void *)__get_free_pages(flags, order); | |
2758 | if (!vaddr) | |
2759 | return NULL; | |
2760 | memset(vaddr, 0, size); | |
2761 | ||
bb9e6d65 FT |
2762 | *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size, |
2763 | DMA_BIDIRECTIONAL, | |
2764 | hwdev->coherent_dma_mask); | |
ba395927 KA |
2765 | if (*dma_handle) |
2766 | return vaddr; | |
2767 | free_pages((unsigned long)vaddr, order); | |
2768 | return NULL; | |
2769 | } | |
2770 | ||
d7ab5c46 FT |
2771 | static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr, |
2772 | dma_addr_t dma_handle) | |
ba395927 KA |
2773 | { |
2774 | int order; | |
2775 | ||
5b6985ce | 2776 | size = PAGE_ALIGN(size); |
ba395927 KA |
2777 | order = get_order(size); |
2778 | ||
0db9b7ae | 2779 | intel_unmap_page(hwdev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); |
ba395927 KA |
2780 | free_pages((unsigned long)vaddr, order); |
2781 | } | |
2782 | ||
d7ab5c46 FT |
2783 | static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, |
2784 | int nelems, enum dma_data_direction dir, | |
2785 | struct dma_attrs *attrs) | |
ba395927 | 2786 | { |
ba395927 KA |
2787 | struct pci_dev *pdev = to_pci_dev(hwdev); |
2788 | struct dmar_domain *domain; | |
d794dc9b | 2789 | unsigned long start_pfn, last_pfn; |
f76aec76 | 2790 | struct iova *iova; |
8c11e798 | 2791 | struct intel_iommu *iommu; |
ba395927 | 2792 | |
73676832 | 2793 | if (iommu_no_mapping(hwdev)) |
ba395927 KA |
2794 | return; |
2795 | ||
2796 | domain = find_domain(pdev); | |
8c11e798 WH |
2797 | BUG_ON(!domain); |
2798 | ||
2799 | iommu = domain_get_iommu(domain); | |
ba395927 | 2800 | |
c03ab37c | 2801 | iova = find_iova(&domain->iovad, IOVA_PFN(sglist[0].dma_address)); |
85b98276 DW |
2802 | if (WARN_ONCE(!iova, "Driver unmaps unmatched sglist at PFN %llx\n", |
2803 | (unsigned long long)sglist[0].dma_address)) | |
f76aec76 | 2804 | return; |
f76aec76 | 2805 | |
d794dc9b DW |
2806 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2807 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
f76aec76 KA |
2808 | |
2809 | /* clear the whole page */ | |
d794dc9b DW |
2810 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2811 | ||
f76aec76 | 2812 | /* free page tables */ |
d794dc9b | 2813 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
f76aec76 | 2814 | |
acea0018 DW |
2815 | if (intel_iommu_strict) { |
2816 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, | |
2817 | last_pfn - start_pfn + 1); | |
2818 | /* free iova */ | |
2819 | __free_iova(&domain->iovad, iova); | |
2820 | } else { | |
2821 | add_unmap(domain, iova); | |
2822 | /* | |
2823 | * queue up the release of the unmap to save the 1/6th of the | |
2824 | * cpu used up by the iotlb flush operation... | |
2825 | */ | |
2826 | } | |
ba395927 KA |
2827 | } |
2828 | ||
ba395927 | 2829 | static int intel_nontranslate_map_sg(struct device *hddev, |
c03ab37c | 2830 | struct scatterlist *sglist, int nelems, int dir) |
ba395927 KA |
2831 | { |
2832 | int i; | |
c03ab37c | 2833 | struct scatterlist *sg; |
ba395927 | 2834 | |
c03ab37c | 2835 | for_each_sg(sglist, sg, nelems, i) { |
12d4d40e | 2836 | BUG_ON(!sg_page(sg)); |
4cf2e75d | 2837 | sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset; |
c03ab37c | 2838 | sg->dma_length = sg->length; |
ba395927 KA |
2839 | } |
2840 | return nelems; | |
2841 | } | |
2842 | ||
d7ab5c46 FT |
2843 | static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems, |
2844 | enum dma_data_direction dir, struct dma_attrs *attrs) | |
ba395927 | 2845 | { |
ba395927 | 2846 | int i; |
ba395927 KA |
2847 | struct pci_dev *pdev = to_pci_dev(hwdev); |
2848 | struct dmar_domain *domain; | |
f76aec76 KA |
2849 | size_t size = 0; |
2850 | int prot = 0; | |
b536d24d | 2851 | size_t offset_pfn = 0; |
f76aec76 KA |
2852 | struct iova *iova = NULL; |
2853 | int ret; | |
c03ab37c | 2854 | struct scatterlist *sg; |
b536d24d | 2855 | unsigned long start_vpfn; |
8c11e798 | 2856 | struct intel_iommu *iommu; |
ba395927 KA |
2857 | |
2858 | BUG_ON(dir == DMA_NONE); | |
73676832 | 2859 | if (iommu_no_mapping(hwdev)) |
c03ab37c | 2860 | return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir); |
ba395927 | 2861 | |
f76aec76 KA |
2862 | domain = get_valid_domain_for_dev(pdev); |
2863 | if (!domain) | |
2864 | return 0; | |
2865 | ||
8c11e798 WH |
2866 | iommu = domain_get_iommu(domain); |
2867 | ||
b536d24d | 2868 | for_each_sg(sglist, sg, nelems, i) |
88cb6a74 | 2869 | size += aligned_nrpages(sg->offset, sg->length); |
f76aec76 | 2870 | |
5a5e02a6 DW |
2871 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
2872 | pdev->dma_mask); | |
f76aec76 | 2873 | if (!iova) { |
c03ab37c | 2874 | sglist->dma_length = 0; |
f76aec76 KA |
2875 | return 0; |
2876 | } | |
2877 | ||
2878 | /* | |
2879 | * Check if DMAR supports zero-length reads on write only | |
2880 | * mappings.. | |
2881 | */ | |
2882 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2883 | !cap_zlr(iommu->cap)) |
f76aec76 KA |
2884 | prot |= DMA_PTE_READ; |
2885 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2886 | prot |= DMA_PTE_WRITE; | |
2887 | ||
b536d24d | 2888 | start_vpfn = mm_to_dma_pfn(iova->pfn_lo); |
e1605495 | 2889 | |
f532959b | 2890 | ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot); |
e1605495 DW |
2891 | if (unlikely(ret)) { |
2892 | /* clear the page */ | |
2893 | dma_pte_clear_range(domain, start_vpfn, | |
2894 | start_vpfn + size - 1); | |
2895 | /* free page tables */ | |
2896 | dma_pte_free_pagetable(domain, start_vpfn, | |
2897 | start_vpfn + size - 1); | |
2898 | /* free iova */ | |
2899 | __free_iova(&domain->iovad, iova); | |
2900 | return 0; | |
ba395927 KA |
2901 | } |
2902 | ||
1f0ef2aa DW |
2903 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2904 | if (cap_caching_mode(iommu->cap)) | |
03d6a246 | 2905 | iommu_flush_iotlb_psi(iommu, 0, start_vpfn, offset_pfn); |
1f0ef2aa | 2906 | else |
8c11e798 | 2907 | iommu_flush_write_buffer(iommu); |
1f0ef2aa | 2908 | |
ba395927 KA |
2909 | return nelems; |
2910 | } | |
2911 | ||
dfb805e8 FT |
2912 | static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) |
2913 | { | |
2914 | return !dma_addr; | |
2915 | } | |
2916 | ||
160c1d8e | 2917 | struct dma_map_ops intel_dma_ops = { |
ba395927 KA |
2918 | .alloc_coherent = intel_alloc_coherent, |
2919 | .free_coherent = intel_free_coherent, | |
ba395927 KA |
2920 | .map_sg = intel_map_sg, |
2921 | .unmap_sg = intel_unmap_sg, | |
ffbbef5c FT |
2922 | .map_page = intel_map_page, |
2923 | .unmap_page = intel_unmap_page, | |
dfb805e8 | 2924 | .mapping_error = intel_mapping_error, |
ba395927 KA |
2925 | }; |
2926 | ||
2927 | static inline int iommu_domain_cache_init(void) | |
2928 | { | |
2929 | int ret = 0; | |
2930 | ||
2931 | iommu_domain_cache = kmem_cache_create("iommu_domain", | |
2932 | sizeof(struct dmar_domain), | |
2933 | 0, | |
2934 | SLAB_HWCACHE_ALIGN, | |
2935 | ||
2936 | NULL); | |
2937 | if (!iommu_domain_cache) { | |
2938 | printk(KERN_ERR "Couldn't create iommu_domain cache\n"); | |
2939 | ret = -ENOMEM; | |
2940 | } | |
2941 | ||
2942 | return ret; | |
2943 | } | |
2944 | ||
2945 | static inline int iommu_devinfo_cache_init(void) | |
2946 | { | |
2947 | int ret = 0; | |
2948 | ||
2949 | iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", | |
2950 | sizeof(struct device_domain_info), | |
2951 | 0, | |
2952 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
2953 | NULL); |
2954 | if (!iommu_devinfo_cache) { | |
2955 | printk(KERN_ERR "Couldn't create devinfo cache\n"); | |
2956 | ret = -ENOMEM; | |
2957 | } | |
2958 | ||
2959 | return ret; | |
2960 | } | |
2961 | ||
2962 | static inline int iommu_iova_cache_init(void) | |
2963 | { | |
2964 | int ret = 0; | |
2965 | ||
2966 | iommu_iova_cache = kmem_cache_create("iommu_iova", | |
2967 | sizeof(struct iova), | |
2968 | 0, | |
2969 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
2970 | NULL); |
2971 | if (!iommu_iova_cache) { | |
2972 | printk(KERN_ERR "Couldn't create iova cache\n"); | |
2973 | ret = -ENOMEM; | |
2974 | } | |
2975 | ||
2976 | return ret; | |
2977 | } | |
2978 | ||
2979 | static int __init iommu_init_mempool(void) | |
2980 | { | |
2981 | int ret; | |
2982 | ret = iommu_iova_cache_init(); | |
2983 | if (ret) | |
2984 | return ret; | |
2985 | ||
2986 | ret = iommu_domain_cache_init(); | |
2987 | if (ret) | |
2988 | goto domain_error; | |
2989 | ||
2990 | ret = iommu_devinfo_cache_init(); | |
2991 | if (!ret) | |
2992 | return ret; | |
2993 | ||
2994 | kmem_cache_destroy(iommu_domain_cache); | |
2995 | domain_error: | |
2996 | kmem_cache_destroy(iommu_iova_cache); | |
2997 | ||
2998 | return -ENOMEM; | |
2999 | } | |
3000 | ||
3001 | static void __init iommu_exit_mempool(void) | |
3002 | { | |
3003 | kmem_cache_destroy(iommu_devinfo_cache); | |
3004 | kmem_cache_destroy(iommu_domain_cache); | |
3005 | kmem_cache_destroy(iommu_iova_cache); | |
3006 | ||
3007 | } | |
3008 | ||
ba395927 KA |
3009 | static void __init init_no_remapping_devices(void) |
3010 | { | |
3011 | struct dmar_drhd_unit *drhd; | |
3012 | ||
3013 | for_each_drhd_unit(drhd) { | |
3014 | if (!drhd->include_all) { | |
3015 | int i; | |
3016 | for (i = 0; i < drhd->devices_cnt; i++) | |
3017 | if (drhd->devices[i] != NULL) | |
3018 | break; | |
3019 | /* ignore DMAR unit if no pci devices exist */ | |
3020 | if (i == drhd->devices_cnt) | |
3021 | drhd->ignored = 1; | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | if (dmar_map_gfx) | |
3026 | return; | |
3027 | ||
3028 | for_each_drhd_unit(drhd) { | |
3029 | int i; | |
3030 | if (drhd->ignored || drhd->include_all) | |
3031 | continue; | |
3032 | ||
3033 | for (i = 0; i < drhd->devices_cnt; i++) | |
3034 | if (drhd->devices[i] && | |
3035 | !IS_GFX_DEVICE(drhd->devices[i])) | |
3036 | break; | |
3037 | ||
3038 | if (i < drhd->devices_cnt) | |
3039 | continue; | |
3040 | ||
3041 | /* bypass IOMMU if it is just for gfx devices */ | |
3042 | drhd->ignored = 1; | |
3043 | for (i = 0; i < drhd->devices_cnt; i++) { | |
3044 | if (!drhd->devices[i]) | |
3045 | continue; | |
358dd8ac | 3046 | drhd->devices[i]->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; |
ba395927 KA |
3047 | } |
3048 | } | |
3049 | } | |
3050 | ||
f59c7b69 FY |
3051 | #ifdef CONFIG_SUSPEND |
3052 | static int init_iommu_hw(void) | |
3053 | { | |
3054 | struct dmar_drhd_unit *drhd; | |
3055 | struct intel_iommu *iommu = NULL; | |
3056 | ||
3057 | for_each_active_iommu(iommu, drhd) | |
3058 | if (iommu->qi) | |
3059 | dmar_reenable_qi(iommu); | |
3060 | ||
3061 | for_each_active_iommu(iommu, drhd) { | |
3062 | iommu_flush_write_buffer(iommu); | |
3063 | ||
3064 | iommu_set_root_entry(iommu); | |
3065 | ||
3066 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3067 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3068 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3069 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 | 3070 | iommu_enable_translation(iommu); |
b94996c9 | 3071 | iommu_disable_protect_mem_regions(iommu); |
f59c7b69 FY |
3072 | } |
3073 | ||
3074 | return 0; | |
3075 | } | |
3076 | ||
3077 | static void iommu_flush_all(void) | |
3078 | { | |
3079 | struct dmar_drhd_unit *drhd; | |
3080 | struct intel_iommu *iommu; | |
3081 | ||
3082 | for_each_active_iommu(iommu, drhd) { | |
3083 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3084 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3085 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3086 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 FY |
3087 | } |
3088 | } | |
3089 | ||
3090 | static int iommu_suspend(struct sys_device *dev, pm_message_t state) | |
3091 | { | |
3092 | struct dmar_drhd_unit *drhd; | |
3093 | struct intel_iommu *iommu = NULL; | |
3094 | unsigned long flag; | |
3095 | ||
3096 | for_each_active_iommu(iommu, drhd) { | |
3097 | iommu->iommu_state = kzalloc(sizeof(u32) * MAX_SR_DMAR_REGS, | |
3098 | GFP_ATOMIC); | |
3099 | if (!iommu->iommu_state) | |
3100 | goto nomem; | |
3101 | } | |
3102 | ||
3103 | iommu_flush_all(); | |
3104 | ||
3105 | for_each_active_iommu(iommu, drhd) { | |
3106 | iommu_disable_translation(iommu); | |
3107 | ||
3108 | spin_lock_irqsave(&iommu->register_lock, flag); | |
3109 | ||
3110 | iommu->iommu_state[SR_DMAR_FECTL_REG] = | |
3111 | readl(iommu->reg + DMAR_FECTL_REG); | |
3112 | iommu->iommu_state[SR_DMAR_FEDATA_REG] = | |
3113 | readl(iommu->reg + DMAR_FEDATA_REG); | |
3114 | iommu->iommu_state[SR_DMAR_FEADDR_REG] = | |
3115 | readl(iommu->reg + DMAR_FEADDR_REG); | |
3116 | iommu->iommu_state[SR_DMAR_FEUADDR_REG] = | |
3117 | readl(iommu->reg + DMAR_FEUADDR_REG); | |
3118 | ||
3119 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
3120 | } | |
3121 | return 0; | |
3122 | ||
3123 | nomem: | |
3124 | for_each_active_iommu(iommu, drhd) | |
3125 | kfree(iommu->iommu_state); | |
3126 | ||
3127 | return -ENOMEM; | |
3128 | } | |
3129 | ||
3130 | static int iommu_resume(struct sys_device *dev) | |
3131 | { | |
3132 | struct dmar_drhd_unit *drhd; | |
3133 | struct intel_iommu *iommu = NULL; | |
3134 | unsigned long flag; | |
3135 | ||
3136 | if (init_iommu_hw()) { | |
3137 | WARN(1, "IOMMU setup failed, DMAR can not resume!\n"); | |
3138 | return -EIO; | |
3139 | } | |
3140 | ||
3141 | for_each_active_iommu(iommu, drhd) { | |
3142 | ||
3143 | spin_lock_irqsave(&iommu->register_lock, flag); | |
3144 | ||
3145 | writel(iommu->iommu_state[SR_DMAR_FECTL_REG], | |
3146 | iommu->reg + DMAR_FECTL_REG); | |
3147 | writel(iommu->iommu_state[SR_DMAR_FEDATA_REG], | |
3148 | iommu->reg + DMAR_FEDATA_REG); | |
3149 | writel(iommu->iommu_state[SR_DMAR_FEADDR_REG], | |
3150 | iommu->reg + DMAR_FEADDR_REG); | |
3151 | writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], | |
3152 | iommu->reg + DMAR_FEUADDR_REG); | |
3153 | ||
3154 | spin_unlock_irqrestore(&iommu->register_lock, flag); | |
3155 | } | |
3156 | ||
3157 | for_each_active_iommu(iommu, drhd) | |
3158 | kfree(iommu->iommu_state); | |
3159 | ||
3160 | return 0; | |
3161 | } | |
3162 | ||
3163 | static struct sysdev_class iommu_sysclass = { | |
3164 | .name = "iommu", | |
3165 | .resume = iommu_resume, | |
3166 | .suspend = iommu_suspend, | |
3167 | }; | |
3168 | ||
3169 | static struct sys_device device_iommu = { | |
3170 | .cls = &iommu_sysclass, | |
3171 | }; | |
3172 | ||
3173 | static int __init init_iommu_sysfs(void) | |
3174 | { | |
3175 | int error; | |
3176 | ||
3177 | error = sysdev_class_register(&iommu_sysclass); | |
3178 | if (error) | |
3179 | return error; | |
3180 | ||
3181 | error = sysdev_register(&device_iommu); | |
3182 | if (error) | |
3183 | sysdev_class_unregister(&iommu_sysclass); | |
3184 | ||
3185 | return error; | |
3186 | } | |
3187 | ||
3188 | #else | |
3189 | static int __init init_iommu_sysfs(void) | |
3190 | { | |
3191 | return 0; | |
3192 | } | |
3193 | #endif /* CONFIG_PM */ | |
3194 | ||
ba395927 KA |
3195 | int __init intel_iommu_init(void) |
3196 | { | |
3197 | int ret = 0; | |
3198 | ||
ba395927 KA |
3199 | if (dmar_table_init()) |
3200 | return -ENODEV; | |
3201 | ||
1886e8a9 SS |
3202 | if (dmar_dev_scope_init()) |
3203 | return -ENODEV; | |
3204 | ||
2ae21010 SS |
3205 | /* |
3206 | * Check the need for DMA-remapping initialization now. | |
3207 | * Above initialization will also be used by Interrupt-remapping. | |
3208 | */ | |
19943b0e | 3209 | if (no_iommu || swiotlb || dmar_disabled) |
2ae21010 SS |
3210 | return -ENODEV; |
3211 | ||
ba395927 KA |
3212 | iommu_init_mempool(); |
3213 | dmar_init_reserved_ranges(); | |
3214 | ||
3215 | init_no_remapping_devices(); | |
3216 | ||
3217 | ret = init_dmars(); | |
3218 | if (ret) { | |
3219 | printk(KERN_ERR "IOMMU: dmar init failed\n"); | |
3220 | put_iova_domain(&reserved_iova_list); | |
3221 | iommu_exit_mempool(); | |
3222 | return ret; | |
3223 | } | |
3224 | printk(KERN_INFO | |
3225 | "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); | |
3226 | ||
5e0d2a6f | 3227 | init_timer(&unmap_timer); |
ba395927 | 3228 | force_iommu = 1; |
19943b0e | 3229 | dma_ops = &intel_dma_ops; |
4ed0d3e6 | 3230 | |
f59c7b69 | 3231 | init_iommu_sysfs(); |
a8bcbb0d JR |
3232 | |
3233 | register_iommu(&intel_iommu_ops); | |
3234 | ||
ba395927 KA |
3235 | return 0; |
3236 | } | |
e820482c | 3237 | |
3199aa6b HW |
3238 | static void iommu_detach_dependent_devices(struct intel_iommu *iommu, |
3239 | struct pci_dev *pdev) | |
3240 | { | |
3241 | struct pci_dev *tmp, *parent; | |
3242 | ||
3243 | if (!iommu || !pdev) | |
3244 | return; | |
3245 | ||
3246 | /* dependent device detach */ | |
3247 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
3248 | /* Secondary interface's bus number and devfn 0 */ | |
3249 | if (tmp) { | |
3250 | parent = pdev->bus->self; | |
3251 | while (parent != tmp) { | |
3252 | iommu_detach_dev(iommu, parent->bus->number, | |
276dbf99 | 3253 | parent->devfn); |
3199aa6b HW |
3254 | parent = parent->bus->self; |
3255 | } | |
3256 | if (tmp->is_pcie) /* this is a PCIE-to-PCI bridge */ | |
3257 | iommu_detach_dev(iommu, | |
3258 | tmp->subordinate->number, 0); | |
3259 | else /* this is a legacy PCI bridge */ | |
276dbf99 DW |
3260 | iommu_detach_dev(iommu, tmp->bus->number, |
3261 | tmp->devfn); | |
3199aa6b HW |
3262 | } |
3263 | } | |
3264 | ||
2c2e2c38 | 3265 | static void domain_remove_one_dev_info(struct dmar_domain *domain, |
c7151a8d WH |
3266 | struct pci_dev *pdev) |
3267 | { | |
3268 | struct device_domain_info *info; | |
3269 | struct intel_iommu *iommu; | |
3270 | unsigned long flags; | |
3271 | int found = 0; | |
3272 | struct list_head *entry, *tmp; | |
3273 | ||
276dbf99 DW |
3274 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3275 | pdev->devfn); | |
c7151a8d WH |
3276 | if (!iommu) |
3277 | return; | |
3278 | ||
3279 | spin_lock_irqsave(&device_domain_lock, flags); | |
3280 | list_for_each_safe(entry, tmp, &domain->devices) { | |
3281 | info = list_entry(entry, struct device_domain_info, link); | |
276dbf99 | 3282 | /* No need to compare PCI domain; it has to be the same */ |
c7151a8d WH |
3283 | if (info->bus == pdev->bus->number && |
3284 | info->devfn == pdev->devfn) { | |
3285 | list_del(&info->link); | |
3286 | list_del(&info->global); | |
3287 | if (info->dev) | |
3288 | info->dev->dev.archdata.iommu = NULL; | |
3289 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
3290 | ||
93a23a72 | 3291 | iommu_disable_dev_iotlb(info); |
c7151a8d | 3292 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3293 | iommu_detach_dependent_devices(iommu, pdev); |
c7151a8d WH |
3294 | free_devinfo_mem(info); |
3295 | ||
3296 | spin_lock_irqsave(&device_domain_lock, flags); | |
3297 | ||
3298 | if (found) | |
3299 | break; | |
3300 | else | |
3301 | continue; | |
3302 | } | |
3303 | ||
3304 | /* if there is no other devices under the same iommu | |
3305 | * owned by this domain, clear this iommu in iommu_bmp | |
3306 | * update iommu count and coherency | |
3307 | */ | |
276dbf99 DW |
3308 | if (iommu == device_to_iommu(info->segment, info->bus, |
3309 | info->devfn)) | |
c7151a8d WH |
3310 | found = 1; |
3311 | } | |
3312 | ||
3313 | if (found == 0) { | |
3314 | unsigned long tmp_flags; | |
3315 | spin_lock_irqsave(&domain->iommu_lock, tmp_flags); | |
3316 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
3317 | domain->iommu_count--; | |
58c610bd | 3318 | domain_update_iommu_cap(domain); |
c7151a8d WH |
3319 | spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); |
3320 | } | |
3321 | ||
3322 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
3323 | } | |
3324 | ||
3325 | static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) | |
3326 | { | |
3327 | struct device_domain_info *info; | |
3328 | struct intel_iommu *iommu; | |
3329 | unsigned long flags1, flags2; | |
3330 | ||
3331 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3332 | while (!list_empty(&domain->devices)) { | |
3333 | info = list_entry(domain->devices.next, | |
3334 | struct device_domain_info, link); | |
3335 | list_del(&info->link); | |
3336 | list_del(&info->global); | |
3337 | if (info->dev) | |
3338 | info->dev->dev.archdata.iommu = NULL; | |
3339 | ||
3340 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3341 | ||
93a23a72 | 3342 | iommu_disable_dev_iotlb(info); |
276dbf99 | 3343 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 3344 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3345 | iommu_detach_dependent_devices(iommu, info->dev); |
c7151a8d WH |
3346 | |
3347 | /* clear this iommu in iommu_bmp, update iommu count | |
58c610bd | 3348 | * and capabilities |
c7151a8d WH |
3349 | */ |
3350 | spin_lock_irqsave(&domain->iommu_lock, flags2); | |
3351 | if (test_and_clear_bit(iommu->seq_id, | |
3352 | &domain->iommu_bmp)) { | |
3353 | domain->iommu_count--; | |
58c610bd | 3354 | domain_update_iommu_cap(domain); |
c7151a8d WH |
3355 | } |
3356 | spin_unlock_irqrestore(&domain->iommu_lock, flags2); | |
3357 | ||
3358 | free_devinfo_mem(info); | |
3359 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3360 | } | |
3361 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3362 | } | |
3363 | ||
5e98c4b1 WH |
3364 | /* domain id for virtual machine, it won't be set in context */ |
3365 | static unsigned long vm_domid; | |
3366 | ||
fe40f1e0 WH |
3367 | static int vm_domain_min_agaw(struct dmar_domain *domain) |
3368 | { | |
3369 | int i; | |
3370 | int min_agaw = domain->agaw; | |
3371 | ||
3372 | i = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); | |
3373 | for (; i < g_num_of_iommus; ) { | |
3374 | if (min_agaw > g_iommus[i]->agaw) | |
3375 | min_agaw = g_iommus[i]->agaw; | |
3376 | ||
3377 | i = find_next_bit(&domain->iommu_bmp, g_num_of_iommus, i+1); | |
3378 | } | |
3379 | ||
3380 | return min_agaw; | |
3381 | } | |
3382 | ||
5e98c4b1 WH |
3383 | static struct dmar_domain *iommu_alloc_vm_domain(void) |
3384 | { | |
3385 | struct dmar_domain *domain; | |
3386 | ||
3387 | domain = alloc_domain_mem(); | |
3388 | if (!domain) | |
3389 | return NULL; | |
3390 | ||
3391 | domain->id = vm_domid++; | |
3392 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); | |
3393 | domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; | |
3394 | ||
3395 | return domain; | |
3396 | } | |
3397 | ||
2c2e2c38 | 3398 | static int md_domain_init(struct dmar_domain *domain, int guest_width) |
5e98c4b1 WH |
3399 | { |
3400 | int adjust_width; | |
3401 | ||
3402 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); | |
5e98c4b1 WH |
3403 | spin_lock_init(&domain->iommu_lock); |
3404 | ||
3405 | domain_reserve_special_ranges(domain); | |
3406 | ||
3407 | /* calculate AGAW */ | |
3408 | domain->gaw = guest_width; | |
3409 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
3410 | domain->agaw = width_to_agaw(adjust_width); | |
3411 | ||
3412 | INIT_LIST_HEAD(&domain->devices); | |
3413 | ||
3414 | domain->iommu_count = 0; | |
3415 | domain->iommu_coherency = 0; | |
c5b15255 | 3416 | domain->iommu_snooping = 0; |
fe40f1e0 | 3417 | domain->max_addr = 0; |
5e98c4b1 WH |
3418 | |
3419 | /* always allocate the top pgd */ | |
3420 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(); | |
3421 | if (!domain->pgd) | |
3422 | return -ENOMEM; | |
3423 | domain_flush_cache(domain, domain->pgd, PAGE_SIZE); | |
3424 | return 0; | |
3425 | } | |
3426 | ||
3427 | static void iommu_free_vm_domain(struct dmar_domain *domain) | |
3428 | { | |
3429 | unsigned long flags; | |
3430 | struct dmar_drhd_unit *drhd; | |
3431 | struct intel_iommu *iommu; | |
3432 | unsigned long i; | |
3433 | unsigned long ndomains; | |
3434 | ||
3435 | for_each_drhd_unit(drhd) { | |
3436 | if (drhd->ignored) | |
3437 | continue; | |
3438 | iommu = drhd->iommu; | |
3439 | ||
3440 | ndomains = cap_ndoms(iommu->cap); | |
3441 | i = find_first_bit(iommu->domain_ids, ndomains); | |
3442 | for (; i < ndomains; ) { | |
3443 | if (iommu->domains[i] == domain) { | |
3444 | spin_lock_irqsave(&iommu->lock, flags); | |
3445 | clear_bit(i, iommu->domain_ids); | |
3446 | iommu->domains[i] = NULL; | |
3447 | spin_unlock_irqrestore(&iommu->lock, flags); | |
3448 | break; | |
3449 | } | |
3450 | i = find_next_bit(iommu->domain_ids, ndomains, i+1); | |
3451 | } | |
3452 | } | |
3453 | } | |
3454 | ||
3455 | static void vm_domain_exit(struct dmar_domain *domain) | |
3456 | { | |
5e98c4b1 WH |
3457 | /* Domain 0 is reserved, so dont process it */ |
3458 | if (!domain) | |
3459 | return; | |
3460 | ||
3461 | vm_domain_remove_all_dev_info(domain); | |
3462 | /* destroy iovas */ | |
3463 | put_iova_domain(&domain->iovad); | |
5e98c4b1 WH |
3464 | |
3465 | /* clear ptes */ | |
595badf5 | 3466 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3467 | |
3468 | /* free page tables */ | |
d794dc9b | 3469 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3470 | |
3471 | iommu_free_vm_domain(domain); | |
3472 | free_domain_mem(domain); | |
3473 | } | |
3474 | ||
5d450806 | 3475 | static int intel_iommu_domain_init(struct iommu_domain *domain) |
38717946 | 3476 | { |
5d450806 | 3477 | struct dmar_domain *dmar_domain; |
38717946 | 3478 | |
5d450806 JR |
3479 | dmar_domain = iommu_alloc_vm_domain(); |
3480 | if (!dmar_domain) { | |
38717946 | 3481 | printk(KERN_ERR |
5d450806 JR |
3482 | "intel_iommu_domain_init: dmar_domain == NULL\n"); |
3483 | return -ENOMEM; | |
38717946 | 3484 | } |
2c2e2c38 | 3485 | if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
38717946 | 3486 | printk(KERN_ERR |
5d450806 JR |
3487 | "intel_iommu_domain_init() failed\n"); |
3488 | vm_domain_exit(dmar_domain); | |
3489 | return -ENOMEM; | |
38717946 | 3490 | } |
5d450806 | 3491 | domain->priv = dmar_domain; |
faa3d6f5 | 3492 | |
5d450806 | 3493 | return 0; |
38717946 | 3494 | } |
38717946 | 3495 | |
5d450806 | 3496 | static void intel_iommu_domain_destroy(struct iommu_domain *domain) |
38717946 | 3497 | { |
5d450806 JR |
3498 | struct dmar_domain *dmar_domain = domain->priv; |
3499 | ||
3500 | domain->priv = NULL; | |
3501 | vm_domain_exit(dmar_domain); | |
38717946 | 3502 | } |
38717946 | 3503 | |
4c5478c9 JR |
3504 | static int intel_iommu_attach_device(struct iommu_domain *domain, |
3505 | struct device *dev) | |
38717946 | 3506 | { |
4c5478c9 JR |
3507 | struct dmar_domain *dmar_domain = domain->priv; |
3508 | struct pci_dev *pdev = to_pci_dev(dev); | |
fe40f1e0 WH |
3509 | struct intel_iommu *iommu; |
3510 | int addr_width; | |
3511 | u64 end; | |
faa3d6f5 WH |
3512 | |
3513 | /* normally pdev is not mapped */ | |
3514 | if (unlikely(domain_context_mapped(pdev))) { | |
3515 | struct dmar_domain *old_domain; | |
3516 | ||
3517 | old_domain = find_domain(pdev); | |
3518 | if (old_domain) { | |
2c2e2c38 FY |
3519 | if (dmar_domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
3520 | dmar_domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) | |
3521 | domain_remove_one_dev_info(old_domain, pdev); | |
faa3d6f5 WH |
3522 | else |
3523 | domain_remove_dev_info(old_domain); | |
3524 | } | |
3525 | } | |
3526 | ||
276dbf99 DW |
3527 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3528 | pdev->devfn); | |
fe40f1e0 WH |
3529 | if (!iommu) |
3530 | return -ENODEV; | |
3531 | ||
3532 | /* check if this iommu agaw is sufficient for max mapped address */ | |
3533 | addr_width = agaw_to_width(iommu->agaw); | |
3534 | end = DOMAIN_MAX_ADDR(addr_width); | |
3535 | end = end & VTD_PAGE_MASK; | |
4c5478c9 | 3536 | if (end < dmar_domain->max_addr) { |
fe40f1e0 WH |
3537 | printk(KERN_ERR "%s: iommu agaw (%d) is not " |
3538 | "sufficient for the mapped address (%llx)\n", | |
4c5478c9 | 3539 | __func__, iommu->agaw, dmar_domain->max_addr); |
fe40f1e0 WH |
3540 | return -EFAULT; |
3541 | } | |
3542 | ||
5fe60f4e | 3543 | return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
38717946 | 3544 | } |
38717946 | 3545 | |
4c5478c9 JR |
3546 | static void intel_iommu_detach_device(struct iommu_domain *domain, |
3547 | struct device *dev) | |
38717946 | 3548 | { |
4c5478c9 JR |
3549 | struct dmar_domain *dmar_domain = domain->priv; |
3550 | struct pci_dev *pdev = to_pci_dev(dev); | |
3551 | ||
2c2e2c38 | 3552 | domain_remove_one_dev_info(dmar_domain, pdev); |
faa3d6f5 | 3553 | } |
c7151a8d | 3554 | |
dde57a21 JR |
3555 | static int intel_iommu_map_range(struct iommu_domain *domain, |
3556 | unsigned long iova, phys_addr_t hpa, | |
3557 | size_t size, int iommu_prot) | |
faa3d6f5 | 3558 | { |
dde57a21 | 3559 | struct dmar_domain *dmar_domain = domain->priv; |
fe40f1e0 WH |
3560 | u64 max_addr; |
3561 | int addr_width; | |
dde57a21 | 3562 | int prot = 0; |
faa3d6f5 | 3563 | int ret; |
fe40f1e0 | 3564 | |
dde57a21 JR |
3565 | if (iommu_prot & IOMMU_READ) |
3566 | prot |= DMA_PTE_READ; | |
3567 | if (iommu_prot & IOMMU_WRITE) | |
3568 | prot |= DMA_PTE_WRITE; | |
9cf06697 SY |
3569 | if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) |
3570 | prot |= DMA_PTE_SNP; | |
dde57a21 | 3571 | |
163cc52c | 3572 | max_addr = iova + size; |
dde57a21 | 3573 | if (dmar_domain->max_addr < max_addr) { |
fe40f1e0 WH |
3574 | int min_agaw; |
3575 | u64 end; | |
3576 | ||
3577 | /* check if minimum agaw is sufficient for mapped address */ | |
dde57a21 | 3578 | min_agaw = vm_domain_min_agaw(dmar_domain); |
fe40f1e0 WH |
3579 | addr_width = agaw_to_width(min_agaw); |
3580 | end = DOMAIN_MAX_ADDR(addr_width); | |
3581 | end = end & VTD_PAGE_MASK; | |
3582 | if (end < max_addr) { | |
3583 | printk(KERN_ERR "%s: iommu agaw (%d) is not " | |
3584 | "sufficient for the mapped address (%llx)\n", | |
3585 | __func__, min_agaw, max_addr); | |
3586 | return -EFAULT; | |
3587 | } | |
dde57a21 | 3588 | dmar_domain->max_addr = max_addr; |
fe40f1e0 | 3589 | } |
ad051221 DW |
3590 | /* Round up size to next multiple of PAGE_SIZE, if it and |
3591 | the low bits of hpa would take us onto the next page */ | |
88cb6a74 | 3592 | size = aligned_nrpages(hpa, size); |
ad051221 DW |
3593 | ret = domain_pfn_mapping(dmar_domain, iova >> VTD_PAGE_SHIFT, |
3594 | hpa >> VTD_PAGE_SHIFT, size, prot); | |
faa3d6f5 | 3595 | return ret; |
38717946 | 3596 | } |
38717946 | 3597 | |
dde57a21 JR |
3598 | static void intel_iommu_unmap_range(struct iommu_domain *domain, |
3599 | unsigned long iova, size_t size) | |
38717946 | 3600 | { |
dde57a21 | 3601 | struct dmar_domain *dmar_domain = domain->priv; |
faa3d6f5 | 3602 | |
4b99d352 SY |
3603 | if (!size) |
3604 | return; | |
3605 | ||
163cc52c DW |
3606 | dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, |
3607 | (iova + size - 1) >> VTD_PAGE_SHIFT); | |
fe40f1e0 | 3608 | |
163cc52c DW |
3609 | if (dmar_domain->max_addr == iova + size) |
3610 | dmar_domain->max_addr = iova; | |
38717946 | 3611 | } |
38717946 | 3612 | |
d14d6577 JR |
3613 | static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, |
3614 | unsigned long iova) | |
38717946 | 3615 | { |
d14d6577 | 3616 | struct dmar_domain *dmar_domain = domain->priv; |
38717946 | 3617 | struct dma_pte *pte; |
faa3d6f5 | 3618 | u64 phys = 0; |
38717946 | 3619 | |
b026fd28 | 3620 | pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT); |
38717946 | 3621 | if (pte) |
faa3d6f5 | 3622 | phys = dma_pte_addr(pte); |
38717946 | 3623 | |
faa3d6f5 | 3624 | return phys; |
38717946 | 3625 | } |
a8bcbb0d | 3626 | |
dbb9fd86 SY |
3627 | static int intel_iommu_domain_has_cap(struct iommu_domain *domain, |
3628 | unsigned long cap) | |
3629 | { | |
3630 | struct dmar_domain *dmar_domain = domain->priv; | |
3631 | ||
3632 | if (cap == IOMMU_CAP_CACHE_COHERENCY) | |
3633 | return dmar_domain->iommu_snooping; | |
3634 | ||
3635 | return 0; | |
3636 | } | |
3637 | ||
a8bcbb0d JR |
3638 | static struct iommu_ops intel_iommu_ops = { |
3639 | .domain_init = intel_iommu_domain_init, | |
3640 | .domain_destroy = intel_iommu_domain_destroy, | |
3641 | .attach_dev = intel_iommu_attach_device, | |
3642 | .detach_dev = intel_iommu_detach_device, | |
3643 | .map = intel_iommu_map_range, | |
3644 | .unmap = intel_iommu_unmap_range, | |
3645 | .iova_to_phys = intel_iommu_iova_to_phys, | |
dbb9fd86 | 3646 | .domain_has_cap = intel_iommu_domain_has_cap, |
a8bcbb0d | 3647 | }; |
9af88143 DW |
3648 | |
3649 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) | |
3650 | { | |
3651 | /* | |
3652 | * Mobile 4 Series Chipset neglects to set RWBF capability, | |
3653 | * but needs it: | |
3654 | */ | |
3655 | printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); | |
3656 | rwbf_quirk = 1; | |
3657 | } | |
3658 | ||
3659 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); |