Commit | Line | Data |
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ba395927 KA |
1 | /* |
2 | * Copyright (c) 2006, Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
98bcef56 | 17 | * Copyright (C) 2006-2008 Intel Corporation |
18 | * Author: Ashok Raj <ashok.raj@intel.com> | |
19 | * Author: Shaohua Li <shaohua.li@intel.com> | |
20 | * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | |
5b6985ce | 21 | * Author: Fenghua Yu <fenghua.yu@intel.com> |
ba395927 KA |
22 | */ |
23 | ||
24 | #include <linux/init.h> | |
25 | #include <linux/bitmap.h> | |
5e0d2a6f | 26 | #include <linux/debugfs.h> |
ba395927 KA |
27 | #include <linux/slab.h> |
28 | #include <linux/irq.h> | |
29 | #include <linux/interrupt.h> | |
ba395927 KA |
30 | #include <linux/spinlock.h> |
31 | #include <linux/pci.h> | |
32 | #include <linux/dmar.h> | |
33 | #include <linux/dma-mapping.h> | |
34 | #include <linux/mempool.h> | |
5e0d2a6f | 35 | #include <linux/timer.h> |
38717946 | 36 | #include <linux/iova.h> |
5d450806 | 37 | #include <linux/iommu.h> |
38717946 | 38 | #include <linux/intel-iommu.h> |
134fac3f | 39 | #include <linux/syscore_ops.h> |
69575d38 | 40 | #include <linux/tboot.h> |
adb2fe02 | 41 | #include <linux/dmi.h> |
5cdede24 | 42 | #include <linux/pci-ats.h> |
ba395927 | 43 | #include <asm/cacheflush.h> |
46a7fa27 | 44 | #include <asm/iommu.h> |
ba395927 | 45 | |
5b6985ce FY |
46 | #define ROOT_SIZE VTD_PAGE_SIZE |
47 | #define CONTEXT_SIZE VTD_PAGE_SIZE | |
48 | ||
825507d6 MT |
49 | #define IS_BRIDGE_HOST_DEVICE(pdev) \ |
50 | ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST) | |
ba395927 KA |
51 | #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) |
52 | #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) | |
e0fc7e0b | 53 | #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) |
ba395927 KA |
54 | |
55 | #define IOAPIC_RANGE_START (0xfee00000) | |
56 | #define IOAPIC_RANGE_END (0xfeefffff) | |
57 | #define IOVA_START_ADDR (0x1000) | |
58 | ||
59 | #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 | |
60 | ||
4ed0d3e6 FY |
61 | #define MAX_AGAW_WIDTH 64 |
62 | ||
2ebe3151 DW |
63 | #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) |
64 | #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) | |
65 | ||
66 | /* We limit DOMAIN_MAX_PFN to fit in an unsigned long, and DOMAIN_MAX_ADDR | |
67 | to match. That way, we can use 'unsigned long' for PFNs with impunity. */ | |
68 | #define DOMAIN_MAX_PFN(gaw) ((unsigned long) min_t(uint64_t, \ | |
69 | __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) | |
70 | #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) | |
ba395927 | 71 | |
f27be03b | 72 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
284901a9 | 73 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
6a35528a | 74 | #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) |
5e0d2a6f | 75 | |
df08cdc7 AM |
76 | /* page table handling */ |
77 | #define LEVEL_STRIDE (9) | |
78 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | |
79 | ||
80 | static inline int agaw_to_level(int agaw) | |
81 | { | |
82 | return agaw + 2; | |
83 | } | |
84 | ||
85 | static inline int agaw_to_width(int agaw) | |
86 | { | |
87 | return 30 + agaw * LEVEL_STRIDE; | |
88 | } | |
89 | ||
90 | static inline int width_to_agaw(int width) | |
91 | { | |
92 | return (width - 30) / LEVEL_STRIDE; | |
93 | } | |
94 | ||
95 | static inline unsigned int level_to_offset_bits(int level) | |
96 | { | |
97 | return (level - 1) * LEVEL_STRIDE; | |
98 | } | |
99 | ||
100 | static inline int pfn_level_offset(unsigned long pfn, int level) | |
101 | { | |
102 | return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; | |
103 | } | |
104 | ||
105 | static inline unsigned long level_mask(int level) | |
106 | { | |
107 | return -1UL << level_to_offset_bits(level); | |
108 | } | |
109 | ||
110 | static inline unsigned long level_size(int level) | |
111 | { | |
112 | return 1UL << level_to_offset_bits(level); | |
113 | } | |
114 | ||
115 | static inline unsigned long align_to_level(unsigned long pfn, int level) | |
116 | { | |
117 | return (pfn + level_size(level) - 1) & level_mask(level); | |
118 | } | |
fd18de50 | 119 | |
6dd9a7c7 YS |
120 | static inline unsigned long lvl_to_nr_pages(unsigned int lvl) |
121 | { | |
122 | return 1 << ((lvl - 1) * LEVEL_STRIDE); | |
123 | } | |
124 | ||
dd4e8319 DW |
125 | /* VT-d pages must always be _smaller_ than MM pages. Otherwise things |
126 | are never going to work. */ | |
127 | static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) | |
128 | { | |
129 | return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
130 | } | |
131 | ||
132 | static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn) | |
133 | { | |
134 | return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
135 | } | |
136 | static inline unsigned long page_to_dma_pfn(struct page *pg) | |
137 | { | |
138 | return mm_to_dma_pfn(page_to_pfn(pg)); | |
139 | } | |
140 | static inline unsigned long virt_to_dma_pfn(void *p) | |
141 | { | |
142 | return page_to_dma_pfn(virt_to_page(p)); | |
143 | } | |
144 | ||
d9630fe9 WH |
145 | /* global iommu list, set NULL for ignored DMAR units */ |
146 | static struct intel_iommu **g_iommus; | |
147 | ||
e0fc7e0b | 148 | static void __init check_tylersburg_isoch(void); |
9af88143 DW |
149 | static int rwbf_quirk; |
150 | ||
b779260b JC |
151 | /* |
152 | * set to 1 to panic kernel if can't successfully enable VT-d | |
153 | * (used when kernel is launched w/ TXT) | |
154 | */ | |
155 | static int force_on = 0; | |
156 | ||
46b08e1a MM |
157 | /* |
158 | * 0: Present | |
159 | * 1-11: Reserved | |
160 | * 12-63: Context Ptr (12 - (haw-1)) | |
161 | * 64-127: Reserved | |
162 | */ | |
163 | struct root_entry { | |
164 | u64 val; | |
165 | u64 rsvd1; | |
166 | }; | |
167 | #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) | |
168 | static inline bool root_present(struct root_entry *root) | |
169 | { | |
170 | return (root->val & 1); | |
171 | } | |
172 | static inline void set_root_present(struct root_entry *root) | |
173 | { | |
174 | root->val |= 1; | |
175 | } | |
176 | static inline void set_root_value(struct root_entry *root, unsigned long value) | |
177 | { | |
178 | root->val |= value & VTD_PAGE_MASK; | |
179 | } | |
180 | ||
181 | static inline struct context_entry * | |
182 | get_context_addr_from_root(struct root_entry *root) | |
183 | { | |
184 | return (struct context_entry *) | |
185 | (root_present(root)?phys_to_virt( | |
186 | root->val & VTD_PAGE_MASK) : | |
187 | NULL); | |
188 | } | |
189 | ||
7a8fc25e MM |
190 | /* |
191 | * low 64 bits: | |
192 | * 0: present | |
193 | * 1: fault processing disable | |
194 | * 2-3: translation type | |
195 | * 12-63: address space root | |
196 | * high 64 bits: | |
197 | * 0-2: address width | |
198 | * 3-6: aval | |
199 | * 8-23: domain id | |
200 | */ | |
201 | struct context_entry { | |
202 | u64 lo; | |
203 | u64 hi; | |
204 | }; | |
c07e7d21 MM |
205 | |
206 | static inline bool context_present(struct context_entry *context) | |
207 | { | |
208 | return (context->lo & 1); | |
209 | } | |
210 | static inline void context_set_present(struct context_entry *context) | |
211 | { | |
212 | context->lo |= 1; | |
213 | } | |
214 | ||
215 | static inline void context_set_fault_enable(struct context_entry *context) | |
216 | { | |
217 | context->lo &= (((u64)-1) << 2) | 1; | |
218 | } | |
219 | ||
c07e7d21 MM |
220 | static inline void context_set_translation_type(struct context_entry *context, |
221 | unsigned long value) | |
222 | { | |
223 | context->lo &= (((u64)-1) << 4) | 3; | |
224 | context->lo |= (value & 3) << 2; | |
225 | } | |
226 | ||
227 | static inline void context_set_address_root(struct context_entry *context, | |
228 | unsigned long value) | |
229 | { | |
230 | context->lo |= value & VTD_PAGE_MASK; | |
231 | } | |
232 | ||
233 | static inline void context_set_address_width(struct context_entry *context, | |
234 | unsigned long value) | |
235 | { | |
236 | context->hi |= value & 7; | |
237 | } | |
238 | ||
239 | static inline void context_set_domain_id(struct context_entry *context, | |
240 | unsigned long value) | |
241 | { | |
242 | context->hi |= (value & ((1 << 16) - 1)) << 8; | |
243 | } | |
244 | ||
245 | static inline void context_clear_entry(struct context_entry *context) | |
246 | { | |
247 | context->lo = 0; | |
248 | context->hi = 0; | |
249 | } | |
7a8fc25e | 250 | |
622ba12a MM |
251 | /* |
252 | * 0: readable | |
253 | * 1: writable | |
254 | * 2-6: reserved | |
255 | * 7: super page | |
9cf06697 SY |
256 | * 8-10: available |
257 | * 11: snoop behavior | |
622ba12a MM |
258 | * 12-63: Host physcial address |
259 | */ | |
260 | struct dma_pte { | |
261 | u64 val; | |
262 | }; | |
622ba12a | 263 | |
19c239ce MM |
264 | static inline void dma_clear_pte(struct dma_pte *pte) |
265 | { | |
266 | pte->val = 0; | |
267 | } | |
268 | ||
269 | static inline void dma_set_pte_readable(struct dma_pte *pte) | |
270 | { | |
271 | pte->val |= DMA_PTE_READ; | |
272 | } | |
273 | ||
274 | static inline void dma_set_pte_writable(struct dma_pte *pte) | |
275 | { | |
276 | pte->val |= DMA_PTE_WRITE; | |
277 | } | |
278 | ||
9cf06697 SY |
279 | static inline void dma_set_pte_snp(struct dma_pte *pte) |
280 | { | |
281 | pte->val |= DMA_PTE_SNP; | |
282 | } | |
283 | ||
19c239ce MM |
284 | static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) |
285 | { | |
286 | pte->val = (pte->val & ~3) | (prot & 3); | |
287 | } | |
288 | ||
289 | static inline u64 dma_pte_addr(struct dma_pte *pte) | |
290 | { | |
c85994e4 DW |
291 | #ifdef CONFIG_64BIT |
292 | return pte->val & VTD_PAGE_MASK; | |
293 | #else | |
294 | /* Must have a full atomic 64-bit read */ | |
1a8bd481 | 295 | return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK; |
c85994e4 | 296 | #endif |
19c239ce MM |
297 | } |
298 | ||
dd4e8319 | 299 | static inline void dma_set_pte_pfn(struct dma_pte *pte, unsigned long pfn) |
19c239ce | 300 | { |
dd4e8319 | 301 | pte->val |= (uint64_t)pfn << VTD_PAGE_SHIFT; |
19c239ce MM |
302 | } |
303 | ||
304 | static inline bool dma_pte_present(struct dma_pte *pte) | |
305 | { | |
306 | return (pte->val & 3) != 0; | |
307 | } | |
622ba12a | 308 | |
4399c8bf AK |
309 | static inline bool dma_pte_superpage(struct dma_pte *pte) |
310 | { | |
311 | return (pte->val & (1 << 7)); | |
312 | } | |
313 | ||
75e6bf96 DW |
314 | static inline int first_pte_in_page(struct dma_pte *pte) |
315 | { | |
316 | return !((unsigned long)pte & ~VTD_PAGE_MASK); | |
317 | } | |
318 | ||
2c2e2c38 FY |
319 | /* |
320 | * This domain is a statically identity mapping domain. | |
321 | * 1. This domain creats a static 1:1 mapping to all usable memory. | |
322 | * 2. It maps to each iommu if successful. | |
323 | * 3. Each iommu mapps to this domain if successful. | |
324 | */ | |
19943b0e DW |
325 | static struct dmar_domain *si_domain; |
326 | static int hw_pass_through = 1; | |
2c2e2c38 | 327 | |
3b5410e7 | 328 | /* devices under the same p2p bridge are owned in one domain */ |
cdc7b837 | 329 | #define DOMAIN_FLAG_P2P_MULTIPLE_DEVICES (1 << 0) |
3b5410e7 | 330 | |
1ce28feb WH |
331 | /* domain represents a virtual machine, more than one devices |
332 | * across iommus may be owned in one domain, e.g. kvm guest. | |
333 | */ | |
334 | #define DOMAIN_FLAG_VIRTUAL_MACHINE (1 << 1) | |
335 | ||
2c2e2c38 FY |
336 | /* si_domain contains mulitple devices */ |
337 | #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2) | |
338 | ||
99126f7c MM |
339 | struct dmar_domain { |
340 | int id; /* domain id */ | |
4c923d47 | 341 | int nid; /* node id */ |
8c11e798 | 342 | unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/ |
99126f7c MM |
343 | |
344 | struct list_head devices; /* all devices' list */ | |
345 | struct iova_domain iovad; /* iova's that belong to this domain */ | |
346 | ||
347 | struct dma_pte *pgd; /* virtual address */ | |
99126f7c MM |
348 | int gaw; /* max guest address width */ |
349 | ||
350 | /* adjusted guest address width, 0 is level 2 30-bit */ | |
351 | int agaw; | |
352 | ||
3b5410e7 | 353 | int flags; /* flags to find out type of domain */ |
8e604097 WH |
354 | |
355 | int iommu_coherency;/* indicate coherency of iommu access */ | |
58c610bd | 356 | int iommu_snooping; /* indicate snooping control feature*/ |
c7151a8d | 357 | int iommu_count; /* reference count of iommu */ |
6dd9a7c7 YS |
358 | int iommu_superpage;/* Level of superpages supported: |
359 | 0 == 4KiB (no superpages), 1 == 2MiB, | |
360 | 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */ | |
c7151a8d | 361 | spinlock_t iommu_lock; /* protect iommu set in domain */ |
fe40f1e0 | 362 | u64 max_addr; /* maximum mapped address */ |
99126f7c MM |
363 | }; |
364 | ||
a647dacb MM |
365 | /* PCI domain-device relationship */ |
366 | struct device_domain_info { | |
367 | struct list_head link; /* link to domain siblings */ | |
368 | struct list_head global; /* link to global list */ | |
276dbf99 DW |
369 | int segment; /* PCI domain */ |
370 | u8 bus; /* PCI bus number */ | |
a647dacb | 371 | u8 devfn; /* PCI devfn number */ |
45e829ea | 372 | struct pci_dev *dev; /* it's NULL for PCIe-to-PCI bridge */ |
93a23a72 | 373 | struct intel_iommu *iommu; /* IOMMU used by this device */ |
a647dacb MM |
374 | struct dmar_domain *domain; /* pointer to domain */ |
375 | }; | |
376 | ||
5e0d2a6f | 377 | static void flush_unmaps_timeout(unsigned long data); |
378 | ||
379 | DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); | |
380 | ||
80b20dd8 | 381 | #define HIGH_WATER_MARK 250 |
382 | struct deferred_flush_tables { | |
383 | int next; | |
384 | struct iova *iova[HIGH_WATER_MARK]; | |
385 | struct dmar_domain *domain[HIGH_WATER_MARK]; | |
386 | }; | |
387 | ||
388 | static struct deferred_flush_tables *deferred_flush; | |
389 | ||
5e0d2a6f | 390 | /* bitmap for indexing intel_iommus */ |
5e0d2a6f | 391 | static int g_num_of_iommus; |
392 | ||
393 | static DEFINE_SPINLOCK(async_umap_flush_lock); | |
394 | static LIST_HEAD(unmaps_to_do); | |
395 | ||
396 | static int timer_on; | |
397 | static long list_size; | |
5e0d2a6f | 398 | |
ba395927 KA |
399 | static void domain_remove_dev_info(struct dmar_domain *domain); |
400 | ||
d3f13810 | 401 | #ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON |
0cd5c3c8 KM |
402 | int dmar_disabled = 0; |
403 | #else | |
404 | int dmar_disabled = 1; | |
d3f13810 | 405 | #endif /*CONFIG_INTEL_IOMMU_DEFAULT_ON*/ |
0cd5c3c8 | 406 | |
2d9e667e | 407 | static int dmar_map_gfx = 1; |
7d3b03ce | 408 | static int dmar_forcedac; |
5e0d2a6f | 409 | static int intel_iommu_strict; |
6dd9a7c7 | 410 | static int intel_iommu_superpage = 1; |
ba395927 | 411 | |
c0771df8 DW |
412 | int intel_iommu_gfx_mapped; |
413 | EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); | |
414 | ||
ba395927 KA |
415 | #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1)) |
416 | static DEFINE_SPINLOCK(device_domain_lock); | |
417 | static LIST_HEAD(device_domain_list); | |
418 | ||
a8bcbb0d JR |
419 | static struct iommu_ops intel_iommu_ops; |
420 | ||
ba395927 KA |
421 | static int __init intel_iommu_setup(char *str) |
422 | { | |
423 | if (!str) | |
424 | return -EINVAL; | |
425 | while (*str) { | |
0cd5c3c8 KM |
426 | if (!strncmp(str, "on", 2)) { |
427 | dmar_disabled = 0; | |
428 | printk(KERN_INFO "Intel-IOMMU: enabled\n"); | |
429 | } else if (!strncmp(str, "off", 3)) { | |
ba395927 | 430 | dmar_disabled = 1; |
0cd5c3c8 | 431 | printk(KERN_INFO "Intel-IOMMU: disabled\n"); |
ba395927 KA |
432 | } else if (!strncmp(str, "igfx_off", 8)) { |
433 | dmar_map_gfx = 0; | |
434 | printk(KERN_INFO | |
435 | "Intel-IOMMU: disable GFX device mapping\n"); | |
7d3b03ce | 436 | } else if (!strncmp(str, "forcedac", 8)) { |
5e0d2a6f | 437 | printk(KERN_INFO |
7d3b03ce KA |
438 | "Intel-IOMMU: Forcing DAC for PCI devices\n"); |
439 | dmar_forcedac = 1; | |
5e0d2a6f | 440 | } else if (!strncmp(str, "strict", 6)) { |
441 | printk(KERN_INFO | |
442 | "Intel-IOMMU: disable batched IOTLB flush\n"); | |
443 | intel_iommu_strict = 1; | |
6dd9a7c7 YS |
444 | } else if (!strncmp(str, "sp_off", 6)) { |
445 | printk(KERN_INFO | |
446 | "Intel-IOMMU: disable supported super page\n"); | |
447 | intel_iommu_superpage = 0; | |
ba395927 KA |
448 | } |
449 | ||
450 | str += strcspn(str, ","); | |
451 | while (*str == ',') | |
452 | str++; | |
453 | } | |
454 | return 0; | |
455 | } | |
456 | __setup("intel_iommu=", intel_iommu_setup); | |
457 | ||
458 | static struct kmem_cache *iommu_domain_cache; | |
459 | static struct kmem_cache *iommu_devinfo_cache; | |
460 | static struct kmem_cache *iommu_iova_cache; | |
461 | ||
4c923d47 | 462 | static inline void *alloc_pgtable_page(int node) |
eb3fa7cb | 463 | { |
4c923d47 SS |
464 | struct page *page; |
465 | void *vaddr = NULL; | |
eb3fa7cb | 466 | |
4c923d47 SS |
467 | page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0); |
468 | if (page) | |
469 | vaddr = page_address(page); | |
eb3fa7cb | 470 | return vaddr; |
ba395927 KA |
471 | } |
472 | ||
473 | static inline void free_pgtable_page(void *vaddr) | |
474 | { | |
475 | free_page((unsigned long)vaddr); | |
476 | } | |
477 | ||
478 | static inline void *alloc_domain_mem(void) | |
479 | { | |
354bb65e | 480 | return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC); |
ba395927 KA |
481 | } |
482 | ||
38717946 | 483 | static void free_domain_mem(void *vaddr) |
ba395927 KA |
484 | { |
485 | kmem_cache_free(iommu_domain_cache, vaddr); | |
486 | } | |
487 | ||
488 | static inline void * alloc_devinfo_mem(void) | |
489 | { | |
354bb65e | 490 | return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC); |
ba395927 KA |
491 | } |
492 | ||
493 | static inline void free_devinfo_mem(void *vaddr) | |
494 | { | |
495 | kmem_cache_free(iommu_devinfo_cache, vaddr); | |
496 | } | |
497 | ||
498 | struct iova *alloc_iova_mem(void) | |
499 | { | |
354bb65e | 500 | return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC); |
ba395927 KA |
501 | } |
502 | ||
503 | void free_iova_mem(struct iova *iova) | |
504 | { | |
505 | kmem_cache_free(iommu_iova_cache, iova); | |
506 | } | |
507 | ||
1b573683 | 508 | |
4ed0d3e6 | 509 | static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) |
1b573683 WH |
510 | { |
511 | unsigned long sagaw; | |
512 | int agaw = -1; | |
513 | ||
514 | sagaw = cap_sagaw(iommu->cap); | |
4ed0d3e6 | 515 | for (agaw = width_to_agaw(max_gaw); |
1b573683 WH |
516 | agaw >= 0; agaw--) { |
517 | if (test_bit(agaw, &sagaw)) | |
518 | break; | |
519 | } | |
520 | ||
521 | return agaw; | |
522 | } | |
523 | ||
4ed0d3e6 FY |
524 | /* |
525 | * Calculate max SAGAW for each iommu. | |
526 | */ | |
527 | int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
528 | { | |
529 | return __iommu_calculate_agaw(iommu, MAX_AGAW_WIDTH); | |
530 | } | |
531 | ||
532 | /* | |
533 | * calculate agaw for each iommu. | |
534 | * "SAGAW" may be different across iommus, use a default agaw, and | |
535 | * get a supported less agaw for iommus that don't support the default agaw. | |
536 | */ | |
537 | int iommu_calculate_agaw(struct intel_iommu *iommu) | |
538 | { | |
539 | return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
540 | } | |
541 | ||
2c2e2c38 | 542 | /* This functionin only returns single iommu in a domain */ |
8c11e798 WH |
543 | static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) |
544 | { | |
545 | int iommu_id; | |
546 | ||
2c2e2c38 | 547 | /* si_domain and vm domain should not get here. */ |
1ce28feb | 548 | BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE); |
2c2e2c38 | 549 | BUG_ON(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY); |
1ce28feb | 550 | |
8c11e798 WH |
551 | iommu_id = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); |
552 | if (iommu_id < 0 || iommu_id >= g_num_of_iommus) | |
553 | return NULL; | |
554 | ||
555 | return g_iommus[iommu_id]; | |
556 | } | |
557 | ||
8e604097 WH |
558 | static void domain_update_iommu_coherency(struct dmar_domain *domain) |
559 | { | |
560 | int i; | |
561 | ||
562 | domain->iommu_coherency = 1; | |
563 | ||
a45946ab | 564 | for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { |
8e604097 WH |
565 | if (!ecap_coherent(g_iommus[i]->ecap)) { |
566 | domain->iommu_coherency = 0; | |
567 | break; | |
568 | } | |
8e604097 WH |
569 | } |
570 | } | |
571 | ||
58c610bd SY |
572 | static void domain_update_iommu_snooping(struct dmar_domain *domain) |
573 | { | |
574 | int i; | |
575 | ||
576 | domain->iommu_snooping = 1; | |
577 | ||
a45946ab | 578 | for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { |
58c610bd SY |
579 | if (!ecap_sc_support(g_iommus[i]->ecap)) { |
580 | domain->iommu_snooping = 0; | |
581 | break; | |
582 | } | |
58c610bd SY |
583 | } |
584 | } | |
585 | ||
6dd9a7c7 YS |
586 | static void domain_update_iommu_superpage(struct dmar_domain *domain) |
587 | { | |
8140a95d AK |
588 | struct dmar_drhd_unit *drhd; |
589 | struct intel_iommu *iommu = NULL; | |
590 | int mask = 0xf; | |
6dd9a7c7 YS |
591 | |
592 | if (!intel_iommu_superpage) { | |
593 | domain->iommu_superpage = 0; | |
594 | return; | |
595 | } | |
596 | ||
8140a95d AK |
597 | /* set iommu_superpage to the smallest common denominator */ |
598 | for_each_active_iommu(iommu, drhd) { | |
599 | mask &= cap_super_page_val(iommu->cap); | |
6dd9a7c7 YS |
600 | if (!mask) { |
601 | break; | |
602 | } | |
603 | } | |
604 | domain->iommu_superpage = fls(mask); | |
605 | } | |
606 | ||
58c610bd SY |
607 | /* Some capabilities may be different across iommus */ |
608 | static void domain_update_iommu_cap(struct dmar_domain *domain) | |
609 | { | |
610 | domain_update_iommu_coherency(domain); | |
611 | domain_update_iommu_snooping(domain); | |
6dd9a7c7 | 612 | domain_update_iommu_superpage(domain); |
58c610bd SY |
613 | } |
614 | ||
276dbf99 | 615 | static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) |
c7151a8d WH |
616 | { |
617 | struct dmar_drhd_unit *drhd = NULL; | |
618 | int i; | |
619 | ||
620 | for_each_drhd_unit(drhd) { | |
621 | if (drhd->ignored) | |
622 | continue; | |
276dbf99 DW |
623 | if (segment != drhd->segment) |
624 | continue; | |
c7151a8d | 625 | |
924b6231 | 626 | for (i = 0; i < drhd->devices_cnt; i++) { |
288e4877 DH |
627 | if (drhd->devices[i] && |
628 | drhd->devices[i]->bus->number == bus && | |
c7151a8d WH |
629 | drhd->devices[i]->devfn == devfn) |
630 | return drhd->iommu; | |
4958c5dc DW |
631 | if (drhd->devices[i] && |
632 | drhd->devices[i]->subordinate && | |
924b6231 DW |
633 | drhd->devices[i]->subordinate->number <= bus && |
634 | drhd->devices[i]->subordinate->subordinate >= bus) | |
635 | return drhd->iommu; | |
636 | } | |
c7151a8d WH |
637 | |
638 | if (drhd->include_all) | |
639 | return drhd->iommu; | |
640 | } | |
641 | ||
642 | return NULL; | |
643 | } | |
644 | ||
5331fe6f WH |
645 | static void domain_flush_cache(struct dmar_domain *domain, |
646 | void *addr, int size) | |
647 | { | |
648 | if (!domain->iommu_coherency) | |
649 | clflush_cache_range(addr, size); | |
650 | } | |
651 | ||
ba395927 KA |
652 | /* Gets context entry for a given bus and devfn */ |
653 | static struct context_entry * device_to_context_entry(struct intel_iommu *iommu, | |
654 | u8 bus, u8 devfn) | |
655 | { | |
656 | struct root_entry *root; | |
657 | struct context_entry *context; | |
658 | unsigned long phy_addr; | |
659 | unsigned long flags; | |
660 | ||
661 | spin_lock_irqsave(&iommu->lock, flags); | |
662 | root = &iommu->root_entry[bus]; | |
663 | context = get_context_addr_from_root(root); | |
664 | if (!context) { | |
4c923d47 SS |
665 | context = (struct context_entry *) |
666 | alloc_pgtable_page(iommu->node); | |
ba395927 KA |
667 | if (!context) { |
668 | spin_unlock_irqrestore(&iommu->lock, flags); | |
669 | return NULL; | |
670 | } | |
5b6985ce | 671 | __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE); |
ba395927 KA |
672 | phy_addr = virt_to_phys((void *)context); |
673 | set_root_value(root, phy_addr); | |
674 | set_root_present(root); | |
675 | __iommu_flush_cache(iommu, root, sizeof(*root)); | |
676 | } | |
677 | spin_unlock_irqrestore(&iommu->lock, flags); | |
678 | return &context[devfn]; | |
679 | } | |
680 | ||
681 | static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
682 | { | |
683 | struct root_entry *root; | |
684 | struct context_entry *context; | |
685 | int ret; | |
686 | unsigned long flags; | |
687 | ||
688 | spin_lock_irqsave(&iommu->lock, flags); | |
689 | root = &iommu->root_entry[bus]; | |
690 | context = get_context_addr_from_root(root); | |
691 | if (!context) { | |
692 | ret = 0; | |
693 | goto out; | |
694 | } | |
c07e7d21 | 695 | ret = context_present(&context[devfn]); |
ba395927 KA |
696 | out: |
697 | spin_unlock_irqrestore(&iommu->lock, flags); | |
698 | return ret; | |
699 | } | |
700 | ||
701 | static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
702 | { | |
703 | struct root_entry *root; | |
704 | struct context_entry *context; | |
705 | unsigned long flags; | |
706 | ||
707 | spin_lock_irqsave(&iommu->lock, flags); | |
708 | root = &iommu->root_entry[bus]; | |
709 | context = get_context_addr_from_root(root); | |
710 | if (context) { | |
c07e7d21 | 711 | context_clear_entry(&context[devfn]); |
ba395927 KA |
712 | __iommu_flush_cache(iommu, &context[devfn], \ |
713 | sizeof(*context)); | |
714 | } | |
715 | spin_unlock_irqrestore(&iommu->lock, flags); | |
716 | } | |
717 | ||
718 | static void free_context_table(struct intel_iommu *iommu) | |
719 | { | |
720 | struct root_entry *root; | |
721 | int i; | |
722 | unsigned long flags; | |
723 | struct context_entry *context; | |
724 | ||
725 | spin_lock_irqsave(&iommu->lock, flags); | |
726 | if (!iommu->root_entry) { | |
727 | goto out; | |
728 | } | |
729 | for (i = 0; i < ROOT_ENTRY_NR; i++) { | |
730 | root = &iommu->root_entry[i]; | |
731 | context = get_context_addr_from_root(root); | |
732 | if (context) | |
733 | free_pgtable_page(context); | |
734 | } | |
735 | free_pgtable_page(iommu->root_entry); | |
736 | iommu->root_entry = NULL; | |
737 | out: | |
738 | spin_unlock_irqrestore(&iommu->lock, flags); | |
739 | } | |
740 | ||
b026fd28 | 741 | static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, |
4399c8bf | 742 | unsigned long pfn, int target_level) |
ba395927 | 743 | { |
b026fd28 | 744 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
ba395927 KA |
745 | struct dma_pte *parent, *pte = NULL; |
746 | int level = agaw_to_level(domain->agaw); | |
4399c8bf | 747 | int offset; |
ba395927 KA |
748 | |
749 | BUG_ON(!domain->pgd); | |
b026fd28 | 750 | BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width); |
ba395927 KA |
751 | parent = domain->pgd; |
752 | ||
ba395927 KA |
753 | while (level > 0) { |
754 | void *tmp_page; | |
755 | ||
b026fd28 | 756 | offset = pfn_level_offset(pfn, level); |
ba395927 | 757 | pte = &parent[offset]; |
4399c8bf | 758 | if (!target_level && (dma_pte_superpage(pte) || !dma_pte_present(pte))) |
6dd9a7c7 YS |
759 | break; |
760 | if (level == target_level) | |
ba395927 KA |
761 | break; |
762 | ||
19c239ce | 763 | if (!dma_pte_present(pte)) { |
c85994e4 DW |
764 | uint64_t pteval; |
765 | ||
4c923d47 | 766 | tmp_page = alloc_pgtable_page(domain->nid); |
ba395927 | 767 | |
206a73c1 | 768 | if (!tmp_page) |
ba395927 | 769 | return NULL; |
206a73c1 | 770 | |
c85994e4 | 771 | domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE); |
64de5af0 | 772 | pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE; |
c85994e4 DW |
773 | if (cmpxchg64(&pte->val, 0ULL, pteval)) { |
774 | /* Someone else set it while we were thinking; use theirs. */ | |
775 | free_pgtable_page(tmp_page); | |
776 | } else { | |
777 | dma_pte_addr(pte); | |
778 | domain_flush_cache(domain, pte, sizeof(*pte)); | |
779 | } | |
ba395927 | 780 | } |
19c239ce | 781 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
782 | level--; |
783 | } | |
784 | ||
ba395927 KA |
785 | return pte; |
786 | } | |
787 | ||
6dd9a7c7 | 788 | |
ba395927 | 789 | /* return address's pte at specific level */ |
90dcfb5e DW |
790 | static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, |
791 | unsigned long pfn, | |
6dd9a7c7 | 792 | int level, int *large_page) |
ba395927 KA |
793 | { |
794 | struct dma_pte *parent, *pte = NULL; | |
795 | int total = agaw_to_level(domain->agaw); | |
796 | int offset; | |
797 | ||
798 | parent = domain->pgd; | |
799 | while (level <= total) { | |
90dcfb5e | 800 | offset = pfn_level_offset(pfn, total); |
ba395927 KA |
801 | pte = &parent[offset]; |
802 | if (level == total) | |
803 | return pte; | |
804 | ||
6dd9a7c7 YS |
805 | if (!dma_pte_present(pte)) { |
806 | *large_page = total; | |
ba395927 | 807 | break; |
6dd9a7c7 YS |
808 | } |
809 | ||
810 | if (pte->val & DMA_PTE_LARGE_PAGE) { | |
811 | *large_page = total; | |
812 | return pte; | |
813 | } | |
814 | ||
19c239ce | 815 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
816 | total--; |
817 | } | |
818 | return NULL; | |
819 | } | |
820 | ||
ba395927 | 821 | /* clear last level pte, a tlb flush should be followed */ |
292827cb | 822 | static int dma_pte_clear_range(struct dmar_domain *domain, |
595badf5 DW |
823 | unsigned long start_pfn, |
824 | unsigned long last_pfn) | |
ba395927 | 825 | { |
04b18e65 | 826 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
6dd9a7c7 | 827 | unsigned int large_page = 1; |
310a5ab9 | 828 | struct dma_pte *first_pte, *pte; |
292827cb | 829 | int order; |
66eae846 | 830 | |
04b18e65 | 831 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
595badf5 | 832 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); |
59c36286 | 833 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 834 | |
04b18e65 | 835 | /* we don't need lock here; nobody else touches the iova range */ |
59c36286 | 836 | do { |
6dd9a7c7 YS |
837 | large_page = 1; |
838 | first_pte = pte = dma_pfn_level_pte(domain, start_pfn, 1, &large_page); | |
310a5ab9 | 839 | if (!pte) { |
6dd9a7c7 | 840 | start_pfn = align_to_level(start_pfn + 1, large_page + 1); |
310a5ab9 DW |
841 | continue; |
842 | } | |
6dd9a7c7 | 843 | do { |
310a5ab9 | 844 | dma_clear_pte(pte); |
6dd9a7c7 | 845 | start_pfn += lvl_to_nr_pages(large_page); |
310a5ab9 | 846 | pte++; |
75e6bf96 DW |
847 | } while (start_pfn <= last_pfn && !first_pte_in_page(pte)); |
848 | ||
310a5ab9 DW |
849 | domain_flush_cache(domain, first_pte, |
850 | (void *)pte - (void *)first_pte); | |
59c36286 DW |
851 | |
852 | } while (start_pfn && start_pfn <= last_pfn); | |
292827cb AK |
853 | |
854 | order = (large_page - 1) * 9; | |
855 | return order; | |
ba395927 KA |
856 | } |
857 | ||
858 | /* free page table pages. last level pte should already be cleared */ | |
859 | static void dma_pte_free_pagetable(struct dmar_domain *domain, | |
d794dc9b DW |
860 | unsigned long start_pfn, |
861 | unsigned long last_pfn) | |
ba395927 | 862 | { |
6660c63a | 863 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
f3a0a52f | 864 | struct dma_pte *first_pte, *pte; |
ba395927 KA |
865 | int total = agaw_to_level(domain->agaw); |
866 | int level; | |
6660c63a | 867 | unsigned long tmp; |
6dd9a7c7 | 868 | int large_page = 2; |
ba395927 | 869 | |
6660c63a DW |
870 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
871 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); | |
59c36286 | 872 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 873 | |
f3a0a52f | 874 | /* We don't need lock here; nobody else touches the iova range */ |
ba395927 KA |
875 | level = 2; |
876 | while (level <= total) { | |
6660c63a DW |
877 | tmp = align_to_level(start_pfn, level); |
878 | ||
f3a0a52f | 879 | /* If we can't even clear one PTE at this level, we're done */ |
6660c63a | 880 | if (tmp + level_size(level) - 1 > last_pfn) |
ba395927 KA |
881 | return; |
882 | ||
59c36286 | 883 | do { |
6dd9a7c7 YS |
884 | large_page = level; |
885 | first_pte = pte = dma_pfn_level_pte(domain, tmp, level, &large_page); | |
886 | if (large_page > level) | |
887 | level = large_page + 1; | |
f3a0a52f DW |
888 | if (!pte) { |
889 | tmp = align_to_level(tmp + 1, level + 1); | |
890 | continue; | |
891 | } | |
75e6bf96 | 892 | do { |
6a43e574 DW |
893 | if (dma_pte_present(pte)) { |
894 | free_pgtable_page(phys_to_virt(dma_pte_addr(pte))); | |
895 | dma_clear_pte(pte); | |
896 | } | |
f3a0a52f DW |
897 | pte++; |
898 | tmp += level_size(level); | |
75e6bf96 DW |
899 | } while (!first_pte_in_page(pte) && |
900 | tmp + level_size(level) - 1 <= last_pfn); | |
901 | ||
f3a0a52f DW |
902 | domain_flush_cache(domain, first_pte, |
903 | (void *)pte - (void *)first_pte); | |
904 | ||
59c36286 | 905 | } while (tmp && tmp + level_size(level) - 1 <= last_pfn); |
ba395927 KA |
906 | level++; |
907 | } | |
908 | /* free pgd */ | |
d794dc9b | 909 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { |
ba395927 KA |
910 | free_pgtable_page(domain->pgd); |
911 | domain->pgd = NULL; | |
912 | } | |
913 | } | |
914 | ||
915 | /* iommu handling */ | |
916 | static int iommu_alloc_root_entry(struct intel_iommu *iommu) | |
917 | { | |
918 | struct root_entry *root; | |
919 | unsigned long flags; | |
920 | ||
4c923d47 | 921 | root = (struct root_entry *)alloc_pgtable_page(iommu->node); |
ba395927 KA |
922 | if (!root) |
923 | return -ENOMEM; | |
924 | ||
5b6985ce | 925 | __iommu_flush_cache(iommu, root, ROOT_SIZE); |
ba395927 KA |
926 | |
927 | spin_lock_irqsave(&iommu->lock, flags); | |
928 | iommu->root_entry = root; | |
929 | spin_unlock_irqrestore(&iommu->lock, flags); | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
ba395927 KA |
934 | static void iommu_set_root_entry(struct intel_iommu *iommu) |
935 | { | |
936 | void *addr; | |
c416daa9 | 937 | u32 sts; |
ba395927 KA |
938 | unsigned long flag; |
939 | ||
940 | addr = iommu->root_entry; | |
941 | ||
1f5b3c3f | 942 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
943 | dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr)); |
944 | ||
c416daa9 | 945 | writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
946 | |
947 | /* Make sure hardware complete it */ | |
948 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 949 | readl, (sts & DMA_GSTS_RTPS), sts); |
ba395927 | 950 | |
1f5b3c3f | 951 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
952 | } |
953 | ||
954 | static void iommu_flush_write_buffer(struct intel_iommu *iommu) | |
955 | { | |
956 | u32 val; | |
957 | unsigned long flag; | |
958 | ||
9af88143 | 959 | if (!rwbf_quirk && !cap_rwbf(iommu->cap)) |
ba395927 | 960 | return; |
ba395927 | 961 | |
1f5b3c3f | 962 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
462b60f6 | 963 | writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
964 | |
965 | /* Make sure hardware complete it */ | |
966 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 967 | readl, (!(val & DMA_GSTS_WBFS)), val); |
ba395927 | 968 | |
1f5b3c3f | 969 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
970 | } |
971 | ||
972 | /* return value determine if we need a write buffer flush */ | |
4c25a2c1 DW |
973 | static void __iommu_flush_context(struct intel_iommu *iommu, |
974 | u16 did, u16 source_id, u8 function_mask, | |
975 | u64 type) | |
ba395927 KA |
976 | { |
977 | u64 val = 0; | |
978 | unsigned long flag; | |
979 | ||
ba395927 KA |
980 | switch (type) { |
981 | case DMA_CCMD_GLOBAL_INVL: | |
982 | val = DMA_CCMD_GLOBAL_INVL; | |
983 | break; | |
984 | case DMA_CCMD_DOMAIN_INVL: | |
985 | val = DMA_CCMD_DOMAIN_INVL|DMA_CCMD_DID(did); | |
986 | break; | |
987 | case DMA_CCMD_DEVICE_INVL: | |
988 | val = DMA_CCMD_DEVICE_INVL|DMA_CCMD_DID(did) | |
989 | | DMA_CCMD_SID(source_id) | DMA_CCMD_FM(function_mask); | |
990 | break; | |
991 | default: | |
992 | BUG(); | |
993 | } | |
994 | val |= DMA_CCMD_ICC; | |
995 | ||
1f5b3c3f | 996 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
997 | dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); |
998 | ||
999 | /* Make sure hardware complete it */ | |
1000 | IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, | |
1001 | dmar_readq, (!(val & DMA_CCMD_ICC)), val); | |
1002 | ||
1f5b3c3f | 1003 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1004 | } |
1005 | ||
ba395927 | 1006 | /* return value determine if we need a write buffer flush */ |
1f0ef2aa DW |
1007 | static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, |
1008 | u64 addr, unsigned int size_order, u64 type) | |
ba395927 KA |
1009 | { |
1010 | int tlb_offset = ecap_iotlb_offset(iommu->ecap); | |
1011 | u64 val = 0, val_iva = 0; | |
1012 | unsigned long flag; | |
1013 | ||
ba395927 KA |
1014 | switch (type) { |
1015 | case DMA_TLB_GLOBAL_FLUSH: | |
1016 | /* global flush doesn't need set IVA_REG */ | |
1017 | val = DMA_TLB_GLOBAL_FLUSH|DMA_TLB_IVT; | |
1018 | break; | |
1019 | case DMA_TLB_DSI_FLUSH: | |
1020 | val = DMA_TLB_DSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
1021 | break; | |
1022 | case DMA_TLB_PSI_FLUSH: | |
1023 | val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
1024 | /* Note: always flush non-leaf currently */ | |
1025 | val_iva = size_order | addr; | |
1026 | break; | |
1027 | default: | |
1028 | BUG(); | |
1029 | } | |
1030 | /* Note: set drain read/write */ | |
1031 | #if 0 | |
1032 | /* | |
1033 | * This is probably to be super secure.. Looks like we can | |
1034 | * ignore it without any impact. | |
1035 | */ | |
1036 | if (cap_read_drain(iommu->cap)) | |
1037 | val |= DMA_TLB_READ_DRAIN; | |
1038 | #endif | |
1039 | if (cap_write_drain(iommu->cap)) | |
1040 | val |= DMA_TLB_WRITE_DRAIN; | |
1041 | ||
1f5b3c3f | 1042 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1043 | /* Note: Only uses first TLB reg currently */ |
1044 | if (val_iva) | |
1045 | dmar_writeq(iommu->reg + tlb_offset, val_iva); | |
1046 | dmar_writeq(iommu->reg + tlb_offset + 8, val); | |
1047 | ||
1048 | /* Make sure hardware complete it */ | |
1049 | IOMMU_WAIT_OP(iommu, tlb_offset + 8, | |
1050 | dmar_readq, (!(val & DMA_TLB_IVT)), val); | |
1051 | ||
1f5b3c3f | 1052 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1053 | |
1054 | /* check IOTLB invalidation granularity */ | |
1055 | if (DMA_TLB_IAIG(val) == 0) | |
1056 | printk(KERN_ERR"IOMMU: flush IOTLB failed\n"); | |
1057 | if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type)) | |
1058 | pr_debug("IOMMU: tlb flush request %Lx, actual %Lx\n", | |
5b6985ce FY |
1059 | (unsigned long long)DMA_TLB_IIRG(type), |
1060 | (unsigned long long)DMA_TLB_IAIG(val)); | |
ba395927 KA |
1061 | } |
1062 | ||
93a23a72 YZ |
1063 | static struct device_domain_info *iommu_support_dev_iotlb( |
1064 | struct dmar_domain *domain, int segment, u8 bus, u8 devfn) | |
1065 | { | |
1066 | int found = 0; | |
1067 | unsigned long flags; | |
1068 | struct device_domain_info *info; | |
1069 | struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); | |
1070 | ||
1071 | if (!ecap_dev_iotlb_support(iommu->ecap)) | |
1072 | return NULL; | |
1073 | ||
1074 | if (!iommu->qi) | |
1075 | return NULL; | |
1076 | ||
1077 | spin_lock_irqsave(&device_domain_lock, flags); | |
1078 | list_for_each_entry(info, &domain->devices, link) | |
1079 | if (info->bus == bus && info->devfn == devfn) { | |
1080 | found = 1; | |
1081 | break; | |
1082 | } | |
1083 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1084 | ||
1085 | if (!found || !info->dev) | |
1086 | return NULL; | |
1087 | ||
1088 | if (!pci_find_ext_capability(info->dev, PCI_EXT_CAP_ID_ATS)) | |
1089 | return NULL; | |
1090 | ||
1091 | if (!dmar_find_matched_atsr_unit(info->dev)) | |
1092 | return NULL; | |
1093 | ||
1094 | info->iommu = iommu; | |
1095 | ||
1096 | return info; | |
1097 | } | |
1098 | ||
1099 | static void iommu_enable_dev_iotlb(struct device_domain_info *info) | |
ba395927 | 1100 | { |
93a23a72 YZ |
1101 | if (!info) |
1102 | return; | |
1103 | ||
1104 | pci_enable_ats(info->dev, VTD_PAGE_SHIFT); | |
1105 | } | |
1106 | ||
1107 | static void iommu_disable_dev_iotlb(struct device_domain_info *info) | |
1108 | { | |
1109 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1110 | return; | |
1111 | ||
1112 | pci_disable_ats(info->dev); | |
1113 | } | |
1114 | ||
1115 | static void iommu_flush_dev_iotlb(struct dmar_domain *domain, | |
1116 | u64 addr, unsigned mask) | |
1117 | { | |
1118 | u16 sid, qdep; | |
1119 | unsigned long flags; | |
1120 | struct device_domain_info *info; | |
1121 | ||
1122 | spin_lock_irqsave(&device_domain_lock, flags); | |
1123 | list_for_each_entry(info, &domain->devices, link) { | |
1124 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1125 | continue; | |
1126 | ||
1127 | sid = info->bus << 8 | info->devfn; | |
1128 | qdep = pci_ats_queue_depth(info->dev); | |
1129 | qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); | |
1130 | } | |
1131 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1132 | } | |
1133 | ||
1f0ef2aa | 1134 | static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, |
82653633 | 1135 | unsigned long pfn, unsigned int pages, int map) |
ba395927 | 1136 | { |
9dd2fe89 | 1137 | unsigned int mask = ilog2(__roundup_pow_of_two(pages)); |
03d6a246 | 1138 | uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; |
ba395927 | 1139 | |
ba395927 KA |
1140 | BUG_ON(pages == 0); |
1141 | ||
ba395927 | 1142 | /* |
9dd2fe89 YZ |
1143 | * Fallback to domain selective flush if no PSI support or the size is |
1144 | * too big. | |
ba395927 KA |
1145 | * PSI requires page size to be 2 ^ x, and the base address is naturally |
1146 | * aligned to the size | |
1147 | */ | |
9dd2fe89 YZ |
1148 | if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap)) |
1149 | iommu->flush.flush_iotlb(iommu, did, 0, 0, | |
1f0ef2aa | 1150 | DMA_TLB_DSI_FLUSH); |
9dd2fe89 YZ |
1151 | else |
1152 | iommu->flush.flush_iotlb(iommu, did, addr, mask, | |
1153 | DMA_TLB_PSI_FLUSH); | |
bf92df30 YZ |
1154 | |
1155 | /* | |
82653633 NA |
1156 | * In caching mode, changes of pages from non-present to present require |
1157 | * flush. However, device IOTLB doesn't need to be flushed in this case. | |
bf92df30 | 1158 | */ |
82653633 | 1159 | if (!cap_caching_mode(iommu->cap) || !map) |
93a23a72 | 1160 | iommu_flush_dev_iotlb(iommu->domains[did], addr, mask); |
ba395927 KA |
1161 | } |
1162 | ||
f8bab735 | 1163 | static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) |
1164 | { | |
1165 | u32 pmen; | |
1166 | unsigned long flags; | |
1167 | ||
1f5b3c3f | 1168 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
f8bab735 | 1169 | pmen = readl(iommu->reg + DMAR_PMEN_REG); |
1170 | pmen &= ~DMA_PMEN_EPM; | |
1171 | writel(pmen, iommu->reg + DMAR_PMEN_REG); | |
1172 | ||
1173 | /* wait for the protected region status bit to clear */ | |
1174 | IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, | |
1175 | readl, !(pmen & DMA_PMEN_PRS), pmen); | |
1176 | ||
1f5b3c3f | 1177 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
f8bab735 | 1178 | } |
1179 | ||
ba395927 KA |
1180 | static int iommu_enable_translation(struct intel_iommu *iommu) |
1181 | { | |
1182 | u32 sts; | |
1183 | unsigned long flags; | |
1184 | ||
1f5b3c3f | 1185 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
c416daa9 DW |
1186 | iommu->gcmd |= DMA_GCMD_TE; |
1187 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
ba395927 KA |
1188 | |
1189 | /* Make sure hardware complete it */ | |
1190 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1191 | readl, (sts & DMA_GSTS_TES), sts); |
ba395927 | 1192 | |
1f5b3c3f | 1193 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
ba395927 KA |
1194 | return 0; |
1195 | } | |
1196 | ||
1197 | static int iommu_disable_translation(struct intel_iommu *iommu) | |
1198 | { | |
1199 | u32 sts; | |
1200 | unsigned long flag; | |
1201 | ||
1f5b3c3f | 1202 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1203 | iommu->gcmd &= ~DMA_GCMD_TE; |
1204 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
1205 | ||
1206 | /* Make sure hardware complete it */ | |
1207 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1208 | readl, (!(sts & DMA_GSTS_TES)), sts); |
ba395927 | 1209 | |
1f5b3c3f | 1210 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1211 | return 0; |
1212 | } | |
1213 | ||
3460a6d9 | 1214 | |
ba395927 KA |
1215 | static int iommu_init_domains(struct intel_iommu *iommu) |
1216 | { | |
1217 | unsigned long ndomains; | |
1218 | unsigned long nlongs; | |
1219 | ||
1220 | ndomains = cap_ndoms(iommu->cap); | |
680a7524 YL |
1221 | pr_debug("IOMMU %d: Number of Domains supportd <%ld>\n", iommu->seq_id, |
1222 | ndomains); | |
ba395927 KA |
1223 | nlongs = BITS_TO_LONGS(ndomains); |
1224 | ||
94a91b50 DD |
1225 | spin_lock_init(&iommu->lock); |
1226 | ||
ba395927 KA |
1227 | /* TBD: there might be 64K domains, |
1228 | * consider other allocation for future chip | |
1229 | */ | |
1230 | iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); | |
1231 | if (!iommu->domain_ids) { | |
1232 | printk(KERN_ERR "Allocating domain id array failed\n"); | |
1233 | return -ENOMEM; | |
1234 | } | |
1235 | iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *), | |
1236 | GFP_KERNEL); | |
1237 | if (!iommu->domains) { | |
1238 | printk(KERN_ERR "Allocating domain array failed\n"); | |
ba395927 KA |
1239 | return -ENOMEM; |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * if Caching mode is set, then invalid translations are tagged | |
1244 | * with domainid 0. Hence we need to pre-allocate it. | |
1245 | */ | |
1246 | if (cap_caching_mode(iommu->cap)) | |
1247 | set_bit(0, iommu->domain_ids); | |
1248 | return 0; | |
1249 | } | |
ba395927 | 1250 | |
ba395927 KA |
1251 | |
1252 | static void domain_exit(struct dmar_domain *domain); | |
5e98c4b1 | 1253 | static void vm_domain_exit(struct dmar_domain *domain); |
e61d98d8 SS |
1254 | |
1255 | void free_dmar_iommu(struct intel_iommu *iommu) | |
ba395927 KA |
1256 | { |
1257 | struct dmar_domain *domain; | |
1258 | int i; | |
c7151a8d | 1259 | unsigned long flags; |
ba395927 | 1260 | |
94a91b50 | 1261 | if ((iommu->domains) && (iommu->domain_ids)) { |
a45946ab | 1262 | for_each_set_bit(i, iommu->domain_ids, cap_ndoms(iommu->cap)) { |
94a91b50 DD |
1263 | domain = iommu->domains[i]; |
1264 | clear_bit(i, iommu->domain_ids); | |
1265 | ||
1266 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1267 | if (--domain->iommu_count == 0) { | |
1268 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) | |
1269 | vm_domain_exit(domain); | |
1270 | else | |
1271 | domain_exit(domain); | |
1272 | } | |
1273 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
5e98c4b1 | 1274 | } |
ba395927 KA |
1275 | } |
1276 | ||
1277 | if (iommu->gcmd & DMA_GCMD_TE) | |
1278 | iommu_disable_translation(iommu); | |
1279 | ||
1280 | if (iommu->irq) { | |
dced35ae | 1281 | irq_set_handler_data(iommu->irq, NULL); |
ba395927 KA |
1282 | /* This will mask the irq */ |
1283 | free_irq(iommu->irq, iommu); | |
1284 | destroy_irq(iommu->irq); | |
1285 | } | |
1286 | ||
1287 | kfree(iommu->domains); | |
1288 | kfree(iommu->domain_ids); | |
1289 | ||
d9630fe9 WH |
1290 | g_iommus[iommu->seq_id] = NULL; |
1291 | ||
1292 | /* if all iommus are freed, free g_iommus */ | |
1293 | for (i = 0; i < g_num_of_iommus; i++) { | |
1294 | if (g_iommus[i]) | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | if (i == g_num_of_iommus) | |
1299 | kfree(g_iommus); | |
1300 | ||
ba395927 KA |
1301 | /* free context mapping */ |
1302 | free_context_table(iommu); | |
ba395927 KA |
1303 | } |
1304 | ||
2c2e2c38 | 1305 | static struct dmar_domain *alloc_domain(void) |
ba395927 | 1306 | { |
ba395927 | 1307 | struct dmar_domain *domain; |
ba395927 KA |
1308 | |
1309 | domain = alloc_domain_mem(); | |
1310 | if (!domain) | |
1311 | return NULL; | |
1312 | ||
4c923d47 | 1313 | domain->nid = -1; |
2c2e2c38 FY |
1314 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); |
1315 | domain->flags = 0; | |
1316 | ||
1317 | return domain; | |
1318 | } | |
1319 | ||
1320 | static int iommu_attach_domain(struct dmar_domain *domain, | |
1321 | struct intel_iommu *iommu) | |
1322 | { | |
1323 | int num; | |
1324 | unsigned long ndomains; | |
1325 | unsigned long flags; | |
1326 | ||
ba395927 KA |
1327 | ndomains = cap_ndoms(iommu->cap); |
1328 | ||
1329 | spin_lock_irqsave(&iommu->lock, flags); | |
2c2e2c38 | 1330 | |
ba395927 KA |
1331 | num = find_first_zero_bit(iommu->domain_ids, ndomains); |
1332 | if (num >= ndomains) { | |
1333 | spin_unlock_irqrestore(&iommu->lock, flags); | |
ba395927 | 1334 | printk(KERN_ERR "IOMMU: no free domain ids\n"); |
2c2e2c38 | 1335 | return -ENOMEM; |
ba395927 KA |
1336 | } |
1337 | ||
ba395927 | 1338 | domain->id = num; |
2c2e2c38 | 1339 | set_bit(num, iommu->domain_ids); |
8c11e798 | 1340 | set_bit(iommu->seq_id, &domain->iommu_bmp); |
ba395927 KA |
1341 | iommu->domains[num] = domain; |
1342 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1343 | ||
2c2e2c38 | 1344 | return 0; |
ba395927 KA |
1345 | } |
1346 | ||
2c2e2c38 FY |
1347 | static void iommu_detach_domain(struct dmar_domain *domain, |
1348 | struct intel_iommu *iommu) | |
ba395927 KA |
1349 | { |
1350 | unsigned long flags; | |
2c2e2c38 FY |
1351 | int num, ndomains; |
1352 | int found = 0; | |
ba395927 | 1353 | |
8c11e798 | 1354 | spin_lock_irqsave(&iommu->lock, flags); |
2c2e2c38 | 1355 | ndomains = cap_ndoms(iommu->cap); |
a45946ab | 1356 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
2c2e2c38 FY |
1357 | if (iommu->domains[num] == domain) { |
1358 | found = 1; | |
1359 | break; | |
1360 | } | |
2c2e2c38 FY |
1361 | } |
1362 | ||
1363 | if (found) { | |
1364 | clear_bit(num, iommu->domain_ids); | |
1365 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
1366 | iommu->domains[num] = NULL; | |
1367 | } | |
8c11e798 | 1368 | spin_unlock_irqrestore(&iommu->lock, flags); |
ba395927 KA |
1369 | } |
1370 | ||
1371 | static struct iova_domain reserved_iova_list; | |
8a443df4 | 1372 | static struct lock_class_key reserved_rbtree_key; |
ba395927 | 1373 | |
51a63e67 | 1374 | static int dmar_init_reserved_ranges(void) |
ba395927 KA |
1375 | { |
1376 | struct pci_dev *pdev = NULL; | |
1377 | struct iova *iova; | |
1378 | int i; | |
ba395927 | 1379 | |
f661197e | 1380 | init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN); |
ba395927 | 1381 | |
8a443df4 MG |
1382 | lockdep_set_class(&reserved_iova_list.iova_rbtree_lock, |
1383 | &reserved_rbtree_key); | |
1384 | ||
ba395927 KA |
1385 | /* IOAPIC ranges shouldn't be accessed by DMA */ |
1386 | iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START), | |
1387 | IOVA_PFN(IOAPIC_RANGE_END)); | |
51a63e67 | 1388 | if (!iova) { |
ba395927 | 1389 | printk(KERN_ERR "Reserve IOAPIC range failed\n"); |
51a63e67 JC |
1390 | return -ENODEV; |
1391 | } | |
ba395927 KA |
1392 | |
1393 | /* Reserve all PCI MMIO to avoid peer-to-peer access */ | |
1394 | for_each_pci_dev(pdev) { | |
1395 | struct resource *r; | |
1396 | ||
1397 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1398 | r = &pdev->resource[i]; | |
1399 | if (!r->flags || !(r->flags & IORESOURCE_MEM)) | |
1400 | continue; | |
1a4a4551 DW |
1401 | iova = reserve_iova(&reserved_iova_list, |
1402 | IOVA_PFN(r->start), | |
1403 | IOVA_PFN(r->end)); | |
51a63e67 | 1404 | if (!iova) { |
ba395927 | 1405 | printk(KERN_ERR "Reserve iova failed\n"); |
51a63e67 JC |
1406 | return -ENODEV; |
1407 | } | |
ba395927 KA |
1408 | } |
1409 | } | |
51a63e67 | 1410 | return 0; |
ba395927 KA |
1411 | } |
1412 | ||
1413 | static void domain_reserve_special_ranges(struct dmar_domain *domain) | |
1414 | { | |
1415 | copy_reserved_iova(&reserved_iova_list, &domain->iovad); | |
1416 | } | |
1417 | ||
1418 | static inline int guestwidth_to_adjustwidth(int gaw) | |
1419 | { | |
1420 | int agaw; | |
1421 | int r = (gaw - 12) % 9; | |
1422 | ||
1423 | if (r == 0) | |
1424 | agaw = gaw; | |
1425 | else | |
1426 | agaw = gaw + 9 - r; | |
1427 | if (agaw > 64) | |
1428 | agaw = 64; | |
1429 | return agaw; | |
1430 | } | |
1431 | ||
1432 | static int domain_init(struct dmar_domain *domain, int guest_width) | |
1433 | { | |
1434 | struct intel_iommu *iommu; | |
1435 | int adjust_width, agaw; | |
1436 | unsigned long sagaw; | |
1437 | ||
f661197e | 1438 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); |
c7151a8d | 1439 | spin_lock_init(&domain->iommu_lock); |
ba395927 KA |
1440 | |
1441 | domain_reserve_special_ranges(domain); | |
1442 | ||
1443 | /* calculate AGAW */ | |
8c11e798 | 1444 | iommu = domain_get_iommu(domain); |
ba395927 KA |
1445 | if (guest_width > cap_mgaw(iommu->cap)) |
1446 | guest_width = cap_mgaw(iommu->cap); | |
1447 | domain->gaw = guest_width; | |
1448 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
1449 | agaw = width_to_agaw(adjust_width); | |
1450 | sagaw = cap_sagaw(iommu->cap); | |
1451 | if (!test_bit(agaw, &sagaw)) { | |
1452 | /* hardware doesn't support it, choose a bigger one */ | |
1453 | pr_debug("IOMMU: hardware doesn't support agaw %d\n", agaw); | |
1454 | agaw = find_next_bit(&sagaw, 5, agaw); | |
1455 | if (agaw >= 5) | |
1456 | return -ENODEV; | |
1457 | } | |
1458 | domain->agaw = agaw; | |
1459 | INIT_LIST_HEAD(&domain->devices); | |
1460 | ||
8e604097 WH |
1461 | if (ecap_coherent(iommu->ecap)) |
1462 | domain->iommu_coherency = 1; | |
1463 | else | |
1464 | domain->iommu_coherency = 0; | |
1465 | ||
58c610bd SY |
1466 | if (ecap_sc_support(iommu->ecap)) |
1467 | domain->iommu_snooping = 1; | |
1468 | else | |
1469 | domain->iommu_snooping = 0; | |
1470 | ||
6dd9a7c7 | 1471 | domain->iommu_superpage = fls(cap_super_page_val(iommu->cap)); |
c7151a8d | 1472 | domain->iommu_count = 1; |
4c923d47 | 1473 | domain->nid = iommu->node; |
c7151a8d | 1474 | |
ba395927 | 1475 | /* always allocate the top pgd */ |
4c923d47 | 1476 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
ba395927 KA |
1477 | if (!domain->pgd) |
1478 | return -ENOMEM; | |
5b6985ce | 1479 | __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE); |
ba395927 KA |
1480 | return 0; |
1481 | } | |
1482 | ||
1483 | static void domain_exit(struct dmar_domain *domain) | |
1484 | { | |
2c2e2c38 FY |
1485 | struct dmar_drhd_unit *drhd; |
1486 | struct intel_iommu *iommu; | |
ba395927 KA |
1487 | |
1488 | /* Domain 0 is reserved, so dont process it */ | |
1489 | if (!domain) | |
1490 | return; | |
1491 | ||
7b668357 AW |
1492 | /* Flush any lazy unmaps that may reference this domain */ |
1493 | if (!intel_iommu_strict) | |
1494 | flush_unmaps_timeout(0); | |
1495 | ||
ba395927 KA |
1496 | domain_remove_dev_info(domain); |
1497 | /* destroy iovas */ | |
1498 | put_iova_domain(&domain->iovad); | |
ba395927 KA |
1499 | |
1500 | /* clear ptes */ | |
595badf5 | 1501 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 KA |
1502 | |
1503 | /* free page tables */ | |
d794dc9b | 1504 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 | 1505 | |
2c2e2c38 FY |
1506 | for_each_active_iommu(iommu, drhd) |
1507 | if (test_bit(iommu->seq_id, &domain->iommu_bmp)) | |
1508 | iommu_detach_domain(domain, iommu); | |
1509 | ||
ba395927 KA |
1510 | free_domain_mem(domain); |
1511 | } | |
1512 | ||
4ed0d3e6 FY |
1513 | static int domain_context_mapping_one(struct dmar_domain *domain, int segment, |
1514 | u8 bus, u8 devfn, int translation) | |
ba395927 KA |
1515 | { |
1516 | struct context_entry *context; | |
ba395927 | 1517 | unsigned long flags; |
5331fe6f | 1518 | struct intel_iommu *iommu; |
ea6606b0 WH |
1519 | struct dma_pte *pgd; |
1520 | unsigned long num; | |
1521 | unsigned long ndomains; | |
1522 | int id; | |
1523 | int agaw; | |
93a23a72 | 1524 | struct device_domain_info *info = NULL; |
ba395927 KA |
1525 | |
1526 | pr_debug("Set context mapping for %02x:%02x.%d\n", | |
1527 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
4ed0d3e6 | 1528 | |
ba395927 | 1529 | BUG_ON(!domain->pgd); |
4ed0d3e6 FY |
1530 | BUG_ON(translation != CONTEXT_TT_PASS_THROUGH && |
1531 | translation != CONTEXT_TT_MULTI_LEVEL); | |
5331fe6f | 1532 | |
276dbf99 | 1533 | iommu = device_to_iommu(segment, bus, devfn); |
5331fe6f WH |
1534 | if (!iommu) |
1535 | return -ENODEV; | |
1536 | ||
ba395927 KA |
1537 | context = device_to_context_entry(iommu, bus, devfn); |
1538 | if (!context) | |
1539 | return -ENOMEM; | |
1540 | spin_lock_irqsave(&iommu->lock, flags); | |
c07e7d21 | 1541 | if (context_present(context)) { |
ba395927 KA |
1542 | spin_unlock_irqrestore(&iommu->lock, flags); |
1543 | return 0; | |
1544 | } | |
1545 | ||
ea6606b0 WH |
1546 | id = domain->id; |
1547 | pgd = domain->pgd; | |
1548 | ||
2c2e2c38 FY |
1549 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
1550 | domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) { | |
ea6606b0 WH |
1551 | int found = 0; |
1552 | ||
1553 | /* find an available domain id for this device in iommu */ | |
1554 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 1555 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
ea6606b0 WH |
1556 | if (iommu->domains[num] == domain) { |
1557 | id = num; | |
1558 | found = 1; | |
1559 | break; | |
1560 | } | |
ea6606b0 WH |
1561 | } |
1562 | ||
1563 | if (found == 0) { | |
1564 | num = find_first_zero_bit(iommu->domain_ids, ndomains); | |
1565 | if (num >= ndomains) { | |
1566 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1567 | printk(KERN_ERR "IOMMU: no free domain ids\n"); | |
1568 | return -EFAULT; | |
1569 | } | |
1570 | ||
1571 | set_bit(num, iommu->domain_ids); | |
1572 | iommu->domains[num] = domain; | |
1573 | id = num; | |
1574 | } | |
1575 | ||
1576 | /* Skip top levels of page tables for | |
1577 | * iommu which has less agaw than default. | |
1672af11 | 1578 | * Unnecessary for PT mode. |
ea6606b0 | 1579 | */ |
1672af11 CW |
1580 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1581 | for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) { | |
1582 | pgd = phys_to_virt(dma_pte_addr(pgd)); | |
1583 | if (!dma_pte_present(pgd)) { | |
1584 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1585 | return -ENOMEM; | |
1586 | } | |
ea6606b0 WH |
1587 | } |
1588 | } | |
1589 | } | |
1590 | ||
1591 | context_set_domain_id(context, id); | |
4ed0d3e6 | 1592 | |
93a23a72 YZ |
1593 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1594 | info = iommu_support_dev_iotlb(domain, segment, bus, devfn); | |
1595 | translation = info ? CONTEXT_TT_DEV_IOTLB : | |
1596 | CONTEXT_TT_MULTI_LEVEL; | |
1597 | } | |
4ed0d3e6 FY |
1598 | /* |
1599 | * In pass through mode, AW must be programmed to indicate the largest | |
1600 | * AGAW value supported by hardware. And ASR is ignored by hardware. | |
1601 | */ | |
93a23a72 | 1602 | if (unlikely(translation == CONTEXT_TT_PASS_THROUGH)) |
4ed0d3e6 | 1603 | context_set_address_width(context, iommu->msagaw); |
93a23a72 YZ |
1604 | else { |
1605 | context_set_address_root(context, virt_to_phys(pgd)); | |
1606 | context_set_address_width(context, iommu->agaw); | |
1607 | } | |
4ed0d3e6 FY |
1608 | |
1609 | context_set_translation_type(context, translation); | |
c07e7d21 MM |
1610 | context_set_fault_enable(context); |
1611 | context_set_present(context); | |
5331fe6f | 1612 | domain_flush_cache(domain, context, sizeof(*context)); |
ba395927 | 1613 | |
4c25a2c1 DW |
1614 | /* |
1615 | * It's a non-present to present mapping. If hardware doesn't cache | |
1616 | * non-present entry we only need to flush the write-buffer. If the | |
1617 | * _does_ cache non-present entries, then it does so in the special | |
1618 | * domain #0, which we have to flush: | |
1619 | */ | |
1620 | if (cap_caching_mode(iommu->cap)) { | |
1621 | iommu->flush.flush_context(iommu, 0, | |
1622 | (((u16)bus) << 8) | devfn, | |
1623 | DMA_CCMD_MASK_NOBIT, | |
1624 | DMA_CCMD_DEVICE_INVL); | |
82653633 | 1625 | iommu->flush.flush_iotlb(iommu, domain->id, 0, 0, DMA_TLB_DSI_FLUSH); |
4c25a2c1 | 1626 | } else { |
ba395927 | 1627 | iommu_flush_write_buffer(iommu); |
4c25a2c1 | 1628 | } |
93a23a72 | 1629 | iommu_enable_dev_iotlb(info); |
ba395927 | 1630 | spin_unlock_irqrestore(&iommu->lock, flags); |
c7151a8d WH |
1631 | |
1632 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1633 | if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) { | |
1634 | domain->iommu_count++; | |
4c923d47 SS |
1635 | if (domain->iommu_count == 1) |
1636 | domain->nid = iommu->node; | |
58c610bd | 1637 | domain_update_iommu_cap(domain); |
c7151a8d WH |
1638 | } |
1639 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
ba395927 KA |
1640 | return 0; |
1641 | } | |
1642 | ||
1643 | static int | |
4ed0d3e6 FY |
1644 | domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, |
1645 | int translation) | |
ba395927 KA |
1646 | { |
1647 | int ret; | |
1648 | struct pci_dev *tmp, *parent; | |
1649 | ||
276dbf99 | 1650 | ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus), |
4ed0d3e6 FY |
1651 | pdev->bus->number, pdev->devfn, |
1652 | translation); | |
ba395927 KA |
1653 | if (ret) |
1654 | return ret; | |
1655 | ||
1656 | /* dependent device mapping */ | |
1657 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1658 | if (!tmp) | |
1659 | return 0; | |
1660 | /* Secondary interface's bus number and devfn 0 */ | |
1661 | parent = pdev->bus->self; | |
1662 | while (parent != tmp) { | |
276dbf99 DW |
1663 | ret = domain_context_mapping_one(domain, |
1664 | pci_domain_nr(parent->bus), | |
1665 | parent->bus->number, | |
4ed0d3e6 | 1666 | parent->devfn, translation); |
ba395927 KA |
1667 | if (ret) |
1668 | return ret; | |
1669 | parent = parent->bus->self; | |
1670 | } | |
45e829ea | 1671 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
ba395927 | 1672 | return domain_context_mapping_one(domain, |
276dbf99 | 1673 | pci_domain_nr(tmp->subordinate), |
4ed0d3e6 FY |
1674 | tmp->subordinate->number, 0, |
1675 | translation); | |
ba395927 KA |
1676 | else /* this is a legacy PCI bridge */ |
1677 | return domain_context_mapping_one(domain, | |
276dbf99 DW |
1678 | pci_domain_nr(tmp->bus), |
1679 | tmp->bus->number, | |
4ed0d3e6 FY |
1680 | tmp->devfn, |
1681 | translation); | |
ba395927 KA |
1682 | } |
1683 | ||
5331fe6f | 1684 | static int domain_context_mapped(struct pci_dev *pdev) |
ba395927 KA |
1685 | { |
1686 | int ret; | |
1687 | struct pci_dev *tmp, *parent; | |
5331fe6f WH |
1688 | struct intel_iommu *iommu; |
1689 | ||
276dbf99 DW |
1690 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
1691 | pdev->devfn); | |
5331fe6f WH |
1692 | if (!iommu) |
1693 | return -ENODEV; | |
ba395927 | 1694 | |
276dbf99 | 1695 | ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); |
ba395927 KA |
1696 | if (!ret) |
1697 | return ret; | |
1698 | /* dependent device mapping */ | |
1699 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1700 | if (!tmp) | |
1701 | return ret; | |
1702 | /* Secondary interface's bus number and devfn 0 */ | |
1703 | parent = pdev->bus->self; | |
1704 | while (parent != tmp) { | |
8c11e798 | 1705 | ret = device_context_mapped(iommu, parent->bus->number, |
276dbf99 | 1706 | parent->devfn); |
ba395927 KA |
1707 | if (!ret) |
1708 | return ret; | |
1709 | parent = parent->bus->self; | |
1710 | } | |
5f4d91a1 | 1711 | if (pci_is_pcie(tmp)) |
276dbf99 DW |
1712 | return device_context_mapped(iommu, tmp->subordinate->number, |
1713 | 0); | |
ba395927 | 1714 | else |
276dbf99 DW |
1715 | return device_context_mapped(iommu, tmp->bus->number, |
1716 | tmp->devfn); | |
ba395927 KA |
1717 | } |
1718 | ||
f532959b FY |
1719 | /* Returns a number of VTD pages, but aligned to MM page size */ |
1720 | static inline unsigned long aligned_nrpages(unsigned long host_addr, | |
1721 | size_t size) | |
1722 | { | |
1723 | host_addr &= ~PAGE_MASK; | |
1724 | return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT; | |
1725 | } | |
1726 | ||
6dd9a7c7 YS |
1727 | /* Return largest possible superpage level for a given mapping */ |
1728 | static inline int hardware_largepage_caps(struct dmar_domain *domain, | |
1729 | unsigned long iov_pfn, | |
1730 | unsigned long phy_pfn, | |
1731 | unsigned long pages) | |
1732 | { | |
1733 | int support, level = 1; | |
1734 | unsigned long pfnmerge; | |
1735 | ||
1736 | support = domain->iommu_superpage; | |
1737 | ||
1738 | /* To use a large page, the virtual *and* physical addresses | |
1739 | must be aligned to 2MiB/1GiB/etc. Lower bits set in either | |
1740 | of them will mean we have to use smaller pages. So just | |
1741 | merge them and check both at once. */ | |
1742 | pfnmerge = iov_pfn | phy_pfn; | |
1743 | ||
1744 | while (support && !(pfnmerge & ~VTD_STRIDE_MASK)) { | |
1745 | pages >>= VTD_STRIDE_SHIFT; | |
1746 | if (!pages) | |
1747 | break; | |
1748 | pfnmerge >>= VTD_STRIDE_SHIFT; | |
1749 | level++; | |
1750 | support--; | |
1751 | } | |
1752 | return level; | |
1753 | } | |
1754 | ||
9051aa02 DW |
1755 | static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1756 | struct scatterlist *sg, unsigned long phys_pfn, | |
1757 | unsigned long nr_pages, int prot) | |
e1605495 DW |
1758 | { |
1759 | struct dma_pte *first_pte = NULL, *pte = NULL; | |
9051aa02 | 1760 | phys_addr_t uninitialized_var(pteval); |
e1605495 | 1761 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
9051aa02 | 1762 | unsigned long sg_res; |
6dd9a7c7 YS |
1763 | unsigned int largepage_lvl = 0; |
1764 | unsigned long lvl_pages = 0; | |
e1605495 DW |
1765 | |
1766 | BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); | |
1767 | ||
1768 | if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) | |
1769 | return -EINVAL; | |
1770 | ||
1771 | prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP; | |
1772 | ||
9051aa02 DW |
1773 | if (sg) |
1774 | sg_res = 0; | |
1775 | else { | |
1776 | sg_res = nr_pages + 1; | |
1777 | pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot; | |
1778 | } | |
1779 | ||
6dd9a7c7 | 1780 | while (nr_pages > 0) { |
c85994e4 DW |
1781 | uint64_t tmp; |
1782 | ||
e1605495 | 1783 | if (!sg_res) { |
f532959b | 1784 | sg_res = aligned_nrpages(sg->offset, sg->length); |
e1605495 DW |
1785 | sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset; |
1786 | sg->dma_length = sg->length; | |
1787 | pteval = page_to_phys(sg_page(sg)) | prot; | |
6dd9a7c7 | 1788 | phys_pfn = pteval >> VTD_PAGE_SHIFT; |
e1605495 | 1789 | } |
6dd9a7c7 | 1790 | |
e1605495 | 1791 | if (!pte) { |
6dd9a7c7 YS |
1792 | largepage_lvl = hardware_largepage_caps(domain, iov_pfn, phys_pfn, sg_res); |
1793 | ||
1794 | first_pte = pte = pfn_to_dma_pte(domain, iov_pfn, largepage_lvl); | |
e1605495 DW |
1795 | if (!pte) |
1796 | return -ENOMEM; | |
6dd9a7c7 YS |
1797 | /* It is large page*/ |
1798 | if (largepage_lvl > 1) | |
1799 | pteval |= DMA_PTE_LARGE_PAGE; | |
1800 | else | |
1801 | pteval &= ~(uint64_t)DMA_PTE_LARGE_PAGE; | |
1802 | ||
e1605495 DW |
1803 | } |
1804 | /* We don't need lock here, nobody else | |
1805 | * touches the iova range | |
1806 | */ | |
7766a3fb | 1807 | tmp = cmpxchg64_local(&pte->val, 0ULL, pteval); |
c85994e4 | 1808 | if (tmp) { |
1bf20f0d | 1809 | static int dumps = 5; |
c85994e4 DW |
1810 | printk(KERN_CRIT "ERROR: DMA PTE for vPFN 0x%lx already set (to %llx not %llx)\n", |
1811 | iov_pfn, tmp, (unsigned long long)pteval); | |
1bf20f0d DW |
1812 | if (dumps) { |
1813 | dumps--; | |
1814 | debug_dma_dump_mappings(NULL); | |
1815 | } | |
1816 | WARN_ON(1); | |
1817 | } | |
6dd9a7c7 YS |
1818 | |
1819 | lvl_pages = lvl_to_nr_pages(largepage_lvl); | |
1820 | ||
1821 | BUG_ON(nr_pages < lvl_pages); | |
1822 | BUG_ON(sg_res < lvl_pages); | |
1823 | ||
1824 | nr_pages -= lvl_pages; | |
1825 | iov_pfn += lvl_pages; | |
1826 | phys_pfn += lvl_pages; | |
1827 | pteval += lvl_pages * VTD_PAGE_SIZE; | |
1828 | sg_res -= lvl_pages; | |
1829 | ||
1830 | /* If the next PTE would be the first in a new page, then we | |
1831 | need to flush the cache on the entries we've just written. | |
1832 | And then we'll need to recalculate 'pte', so clear it and | |
1833 | let it get set again in the if (!pte) block above. | |
1834 | ||
1835 | If we're done (!nr_pages) we need to flush the cache too. | |
1836 | ||
1837 | Also if we've been setting superpages, we may need to | |
1838 | recalculate 'pte' and switch back to smaller pages for the | |
1839 | end of the mapping, if the trailing size is not enough to | |
1840 | use another superpage (i.e. sg_res < lvl_pages). */ | |
e1605495 | 1841 | pte++; |
6dd9a7c7 YS |
1842 | if (!nr_pages || first_pte_in_page(pte) || |
1843 | (largepage_lvl > 1 && sg_res < lvl_pages)) { | |
e1605495 DW |
1844 | domain_flush_cache(domain, first_pte, |
1845 | (void *)pte - (void *)first_pte); | |
1846 | pte = NULL; | |
1847 | } | |
6dd9a7c7 YS |
1848 | |
1849 | if (!sg_res && nr_pages) | |
e1605495 DW |
1850 | sg = sg_next(sg); |
1851 | } | |
1852 | return 0; | |
1853 | } | |
1854 | ||
9051aa02 DW |
1855 | static inline int domain_sg_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1856 | struct scatterlist *sg, unsigned long nr_pages, | |
1857 | int prot) | |
ba395927 | 1858 | { |
9051aa02 DW |
1859 | return __domain_mapping(domain, iov_pfn, sg, 0, nr_pages, prot); |
1860 | } | |
6f6a00e4 | 1861 | |
9051aa02 DW |
1862 | static inline int domain_pfn_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1863 | unsigned long phys_pfn, unsigned long nr_pages, | |
1864 | int prot) | |
1865 | { | |
1866 | return __domain_mapping(domain, iov_pfn, NULL, phys_pfn, nr_pages, prot); | |
ba395927 KA |
1867 | } |
1868 | ||
c7151a8d | 1869 | static void iommu_detach_dev(struct intel_iommu *iommu, u8 bus, u8 devfn) |
ba395927 | 1870 | { |
c7151a8d WH |
1871 | if (!iommu) |
1872 | return; | |
8c11e798 WH |
1873 | |
1874 | clear_context_table(iommu, bus, devfn); | |
1875 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
4c25a2c1 | 1876 | DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 1877 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
ba395927 KA |
1878 | } |
1879 | ||
1880 | static void domain_remove_dev_info(struct dmar_domain *domain) | |
1881 | { | |
1882 | struct device_domain_info *info; | |
1883 | unsigned long flags; | |
c7151a8d | 1884 | struct intel_iommu *iommu; |
ba395927 KA |
1885 | |
1886 | spin_lock_irqsave(&device_domain_lock, flags); | |
1887 | while (!list_empty(&domain->devices)) { | |
1888 | info = list_entry(domain->devices.next, | |
1889 | struct device_domain_info, link); | |
1890 | list_del(&info->link); | |
1891 | list_del(&info->global); | |
1892 | if (info->dev) | |
358dd8ac | 1893 | info->dev->dev.archdata.iommu = NULL; |
ba395927 KA |
1894 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1895 | ||
93a23a72 | 1896 | iommu_disable_dev_iotlb(info); |
276dbf99 | 1897 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 1898 | iommu_detach_dev(iommu, info->bus, info->devfn); |
ba395927 KA |
1899 | free_devinfo_mem(info); |
1900 | ||
1901 | spin_lock_irqsave(&device_domain_lock, flags); | |
1902 | } | |
1903 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * find_domain | |
358dd8ac | 1908 | * Note: we use struct pci_dev->dev.archdata.iommu stores the info |
ba395927 | 1909 | */ |
38717946 | 1910 | static struct dmar_domain * |
ba395927 KA |
1911 | find_domain(struct pci_dev *pdev) |
1912 | { | |
1913 | struct device_domain_info *info; | |
1914 | ||
1915 | /* No lock here, assumes no domain exit in normal case */ | |
358dd8ac | 1916 | info = pdev->dev.archdata.iommu; |
ba395927 KA |
1917 | if (info) |
1918 | return info->domain; | |
1919 | return NULL; | |
1920 | } | |
1921 | ||
ba395927 KA |
1922 | /* domain is initialized */ |
1923 | static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) | |
1924 | { | |
1925 | struct dmar_domain *domain, *found = NULL; | |
1926 | struct intel_iommu *iommu; | |
1927 | struct dmar_drhd_unit *drhd; | |
1928 | struct device_domain_info *info, *tmp; | |
1929 | struct pci_dev *dev_tmp; | |
1930 | unsigned long flags; | |
1931 | int bus = 0, devfn = 0; | |
276dbf99 | 1932 | int segment; |
2c2e2c38 | 1933 | int ret; |
ba395927 KA |
1934 | |
1935 | domain = find_domain(pdev); | |
1936 | if (domain) | |
1937 | return domain; | |
1938 | ||
276dbf99 DW |
1939 | segment = pci_domain_nr(pdev->bus); |
1940 | ||
ba395927 KA |
1941 | dev_tmp = pci_find_upstream_pcie_bridge(pdev); |
1942 | if (dev_tmp) { | |
5f4d91a1 | 1943 | if (pci_is_pcie(dev_tmp)) { |
ba395927 KA |
1944 | bus = dev_tmp->subordinate->number; |
1945 | devfn = 0; | |
1946 | } else { | |
1947 | bus = dev_tmp->bus->number; | |
1948 | devfn = dev_tmp->devfn; | |
1949 | } | |
1950 | spin_lock_irqsave(&device_domain_lock, flags); | |
1951 | list_for_each_entry(info, &device_domain_list, global) { | |
276dbf99 DW |
1952 | if (info->segment == segment && |
1953 | info->bus == bus && info->devfn == devfn) { | |
ba395927 KA |
1954 | found = info->domain; |
1955 | break; | |
1956 | } | |
1957 | } | |
1958 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1959 | /* pcie-pci bridge already has a domain, uses it */ | |
1960 | if (found) { | |
1961 | domain = found; | |
1962 | goto found_domain; | |
1963 | } | |
1964 | } | |
1965 | ||
2c2e2c38 FY |
1966 | domain = alloc_domain(); |
1967 | if (!domain) | |
1968 | goto error; | |
1969 | ||
ba395927 KA |
1970 | /* Allocate new domain for the device */ |
1971 | drhd = dmar_find_matched_drhd_unit(pdev); | |
1972 | if (!drhd) { | |
1973 | printk(KERN_ERR "IOMMU: can't find DMAR for device %s\n", | |
1974 | pci_name(pdev)); | |
1975 | return NULL; | |
1976 | } | |
1977 | iommu = drhd->iommu; | |
1978 | ||
2c2e2c38 FY |
1979 | ret = iommu_attach_domain(domain, iommu); |
1980 | if (ret) { | |
2fe9723d | 1981 | free_domain_mem(domain); |
ba395927 | 1982 | goto error; |
2c2e2c38 | 1983 | } |
ba395927 KA |
1984 | |
1985 | if (domain_init(domain, gaw)) { | |
1986 | domain_exit(domain); | |
1987 | goto error; | |
1988 | } | |
1989 | ||
1990 | /* register pcie-to-pci device */ | |
1991 | if (dev_tmp) { | |
1992 | info = alloc_devinfo_mem(); | |
1993 | if (!info) { | |
1994 | domain_exit(domain); | |
1995 | goto error; | |
1996 | } | |
276dbf99 | 1997 | info->segment = segment; |
ba395927 KA |
1998 | info->bus = bus; |
1999 | info->devfn = devfn; | |
2000 | info->dev = NULL; | |
2001 | info->domain = domain; | |
2002 | /* This domain is shared by devices under p2p bridge */ | |
3b5410e7 | 2003 | domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; |
ba395927 KA |
2004 | |
2005 | /* pcie-to-pci bridge already has a domain, uses it */ | |
2006 | found = NULL; | |
2007 | spin_lock_irqsave(&device_domain_lock, flags); | |
2008 | list_for_each_entry(tmp, &device_domain_list, global) { | |
276dbf99 DW |
2009 | if (tmp->segment == segment && |
2010 | tmp->bus == bus && tmp->devfn == devfn) { | |
ba395927 KA |
2011 | found = tmp->domain; |
2012 | break; | |
2013 | } | |
2014 | } | |
2015 | if (found) { | |
00dfff77 | 2016 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 KA |
2017 | free_devinfo_mem(info); |
2018 | domain_exit(domain); | |
2019 | domain = found; | |
2020 | } else { | |
2021 | list_add(&info->link, &domain->devices); | |
2022 | list_add(&info->global, &device_domain_list); | |
00dfff77 | 2023 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 | 2024 | } |
ba395927 KA |
2025 | } |
2026 | ||
2027 | found_domain: | |
2028 | info = alloc_devinfo_mem(); | |
2029 | if (!info) | |
2030 | goto error; | |
276dbf99 | 2031 | info->segment = segment; |
ba395927 KA |
2032 | info->bus = pdev->bus->number; |
2033 | info->devfn = pdev->devfn; | |
2034 | info->dev = pdev; | |
2035 | info->domain = domain; | |
2036 | spin_lock_irqsave(&device_domain_lock, flags); | |
2037 | /* somebody is fast */ | |
2038 | found = find_domain(pdev); | |
2039 | if (found != NULL) { | |
2040 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2041 | if (found != domain) { | |
2042 | domain_exit(domain); | |
2043 | domain = found; | |
2044 | } | |
2045 | free_devinfo_mem(info); | |
2046 | return domain; | |
2047 | } | |
2048 | list_add(&info->link, &domain->devices); | |
2049 | list_add(&info->global, &device_domain_list); | |
358dd8ac | 2050 | pdev->dev.archdata.iommu = info; |
ba395927 KA |
2051 | spin_unlock_irqrestore(&device_domain_lock, flags); |
2052 | return domain; | |
2053 | error: | |
2054 | /* recheck it here, maybe others set it */ | |
2055 | return find_domain(pdev); | |
2056 | } | |
2057 | ||
2c2e2c38 | 2058 | static int iommu_identity_mapping; |
e0fc7e0b DW |
2059 | #define IDENTMAP_ALL 1 |
2060 | #define IDENTMAP_GFX 2 | |
2061 | #define IDENTMAP_AZALIA 4 | |
2c2e2c38 | 2062 | |
b213203e DW |
2063 | static int iommu_domain_identity_map(struct dmar_domain *domain, |
2064 | unsigned long long start, | |
2065 | unsigned long long end) | |
ba395927 | 2066 | { |
c5395d5c DW |
2067 | unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; |
2068 | unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; | |
2069 | ||
2070 | if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), | |
2071 | dma_to_mm_pfn(last_vpfn))) { | |
ba395927 | 2072 | printk(KERN_ERR "IOMMU: reserve iova failed\n"); |
b213203e | 2073 | return -ENOMEM; |
ba395927 KA |
2074 | } |
2075 | ||
c5395d5c DW |
2076 | pr_debug("Mapping reserved region %llx-%llx for domain %d\n", |
2077 | start, end, domain->id); | |
ba395927 KA |
2078 | /* |
2079 | * RMRR range might have overlap with physical memory range, | |
2080 | * clear it first | |
2081 | */ | |
c5395d5c | 2082 | dma_pte_clear_range(domain, first_vpfn, last_vpfn); |
ba395927 | 2083 | |
c5395d5c DW |
2084 | return domain_pfn_mapping(domain, first_vpfn, first_vpfn, |
2085 | last_vpfn - first_vpfn + 1, | |
61df7443 | 2086 | DMA_PTE_READ|DMA_PTE_WRITE); |
b213203e DW |
2087 | } |
2088 | ||
2089 | static int iommu_prepare_identity_map(struct pci_dev *pdev, | |
2090 | unsigned long long start, | |
2091 | unsigned long long end) | |
2092 | { | |
2093 | struct dmar_domain *domain; | |
2094 | int ret; | |
2095 | ||
c7ab48d2 | 2096 | domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH); |
b213203e DW |
2097 | if (!domain) |
2098 | return -ENOMEM; | |
2099 | ||
19943b0e DW |
2100 | /* For _hardware_ passthrough, don't bother. But for software |
2101 | passthrough, we do it anyway -- it may indicate a memory | |
2102 | range which is reserved in E820, so which didn't get set | |
2103 | up to start with in si_domain */ | |
2104 | if (domain == si_domain && hw_pass_through) { | |
2105 | printk("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", | |
2106 | pci_name(pdev), start, end); | |
2107 | return 0; | |
2108 | } | |
2109 | ||
2110 | printk(KERN_INFO | |
2111 | "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n", | |
2112 | pci_name(pdev), start, end); | |
2ff729f5 | 2113 | |
5595b528 DW |
2114 | if (end < start) { |
2115 | WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n" | |
2116 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2117 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2118 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2119 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
2120 | ret = -EIO; | |
2121 | goto error; | |
2122 | } | |
2123 | ||
2ff729f5 DW |
2124 | if (end >> agaw_to_width(domain->agaw)) { |
2125 | WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n" | |
2126 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2127 | agaw_to_width(domain->agaw), | |
2128 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2129 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2130 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
2131 | ret = -EIO; | |
2132 | goto error; | |
2133 | } | |
19943b0e | 2134 | |
b213203e | 2135 | ret = iommu_domain_identity_map(domain, start, end); |
ba395927 KA |
2136 | if (ret) |
2137 | goto error; | |
2138 | ||
2139 | /* context entry init */ | |
4ed0d3e6 | 2140 | ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
b213203e DW |
2141 | if (ret) |
2142 | goto error; | |
2143 | ||
2144 | return 0; | |
2145 | ||
2146 | error: | |
ba395927 KA |
2147 | domain_exit(domain); |
2148 | return ret; | |
ba395927 KA |
2149 | } |
2150 | ||
2151 | static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, | |
2152 | struct pci_dev *pdev) | |
2153 | { | |
358dd8ac | 2154 | if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) |
ba395927 KA |
2155 | return 0; |
2156 | return iommu_prepare_identity_map(pdev, rmrr->base_address, | |
70e535d1 | 2157 | rmrr->end_address); |
ba395927 KA |
2158 | } |
2159 | ||
d3f13810 | 2160 | #ifdef CONFIG_INTEL_IOMMU_FLOPPY_WA |
49a0429e KA |
2161 | static inline void iommu_prepare_isa(void) |
2162 | { | |
2163 | struct pci_dev *pdev; | |
2164 | int ret; | |
2165 | ||
2166 | pdev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); | |
2167 | if (!pdev) | |
2168 | return; | |
2169 | ||
c7ab48d2 | 2170 | printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n"); |
70e535d1 | 2171 | ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024 - 1); |
49a0429e KA |
2172 | |
2173 | if (ret) | |
c7ab48d2 DW |
2174 | printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; " |
2175 | "floppy might not work\n"); | |
49a0429e KA |
2176 | |
2177 | } | |
2178 | #else | |
2179 | static inline void iommu_prepare_isa(void) | |
2180 | { | |
2181 | return; | |
2182 | } | |
d3f13810 | 2183 | #endif /* !CONFIG_INTEL_IOMMU_FLPY_WA */ |
49a0429e | 2184 | |
2c2e2c38 | 2185 | static int md_domain_init(struct dmar_domain *domain, int guest_width); |
c7ab48d2 DW |
2186 | |
2187 | static int __init si_domain_work_fn(unsigned long start_pfn, | |
2188 | unsigned long end_pfn, void *datax) | |
2189 | { | |
2190 | int *ret = datax; | |
2191 | ||
2192 | *ret = iommu_domain_identity_map(si_domain, | |
2193 | (uint64_t)start_pfn << PAGE_SHIFT, | |
2194 | (uint64_t)end_pfn << PAGE_SHIFT); | |
2195 | return *ret; | |
2196 | ||
2197 | } | |
2198 | ||
071e1374 | 2199 | static int __init si_domain_init(int hw) |
2c2e2c38 FY |
2200 | { |
2201 | struct dmar_drhd_unit *drhd; | |
2202 | struct intel_iommu *iommu; | |
c7ab48d2 | 2203 | int nid, ret = 0; |
2c2e2c38 FY |
2204 | |
2205 | si_domain = alloc_domain(); | |
2206 | if (!si_domain) | |
2207 | return -EFAULT; | |
2208 | ||
c7ab48d2 | 2209 | pr_debug("Identity mapping domain is domain %d\n", si_domain->id); |
2c2e2c38 FY |
2210 | |
2211 | for_each_active_iommu(iommu, drhd) { | |
2212 | ret = iommu_attach_domain(si_domain, iommu); | |
2213 | if (ret) { | |
2214 | domain_exit(si_domain); | |
2215 | return -EFAULT; | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { | |
2220 | domain_exit(si_domain); | |
2221 | return -EFAULT; | |
2222 | } | |
2223 | ||
2224 | si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; | |
2225 | ||
19943b0e DW |
2226 | if (hw) |
2227 | return 0; | |
2228 | ||
c7ab48d2 DW |
2229 | for_each_online_node(nid) { |
2230 | work_with_active_regions(nid, si_domain_work_fn, &ret); | |
2231 | if (ret) | |
2232 | return ret; | |
2233 | } | |
2234 | ||
2c2e2c38 FY |
2235 | return 0; |
2236 | } | |
2237 | ||
2238 | static void domain_remove_one_dev_info(struct dmar_domain *domain, | |
2239 | struct pci_dev *pdev); | |
2240 | static int identity_mapping(struct pci_dev *pdev) | |
2241 | { | |
2242 | struct device_domain_info *info; | |
2243 | ||
2244 | if (likely(!iommu_identity_mapping)) | |
2245 | return 0; | |
2246 | ||
cb452a40 MT |
2247 | info = pdev->dev.archdata.iommu; |
2248 | if (info && info != DUMMY_DEVICE_DOMAIN_INFO) | |
2249 | return (info->domain == si_domain); | |
2c2e2c38 | 2250 | |
2c2e2c38 FY |
2251 | return 0; |
2252 | } | |
2253 | ||
2254 | static int domain_add_dev_info(struct dmar_domain *domain, | |
5fe60f4e DW |
2255 | struct pci_dev *pdev, |
2256 | int translation) | |
2c2e2c38 FY |
2257 | { |
2258 | struct device_domain_info *info; | |
2259 | unsigned long flags; | |
5fe60f4e | 2260 | int ret; |
2c2e2c38 FY |
2261 | |
2262 | info = alloc_devinfo_mem(); | |
2263 | if (!info) | |
2264 | return -ENOMEM; | |
2265 | ||
5fe60f4e DW |
2266 | ret = domain_context_mapping(domain, pdev, translation); |
2267 | if (ret) { | |
2268 | free_devinfo_mem(info); | |
2269 | return ret; | |
2270 | } | |
2271 | ||
2c2e2c38 FY |
2272 | info->segment = pci_domain_nr(pdev->bus); |
2273 | info->bus = pdev->bus->number; | |
2274 | info->devfn = pdev->devfn; | |
2275 | info->dev = pdev; | |
2276 | info->domain = domain; | |
2277 | ||
2278 | spin_lock_irqsave(&device_domain_lock, flags); | |
2279 | list_add(&info->link, &domain->devices); | |
2280 | list_add(&info->global, &device_domain_list); | |
2281 | pdev->dev.archdata.iommu = info; | |
2282 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2283 | ||
2284 | return 0; | |
2285 | } | |
2286 | ||
6941af28 DW |
2287 | static int iommu_should_identity_map(struct pci_dev *pdev, int startup) |
2288 | { | |
e0fc7e0b DW |
2289 | if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) |
2290 | return 1; | |
2291 | ||
2292 | if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) | |
2293 | return 1; | |
2294 | ||
2295 | if (!(iommu_identity_mapping & IDENTMAP_ALL)) | |
2296 | return 0; | |
6941af28 | 2297 | |
3dfc813d DW |
2298 | /* |
2299 | * We want to start off with all devices in the 1:1 domain, and | |
2300 | * take them out later if we find they can't access all of memory. | |
2301 | * | |
2302 | * However, we can't do this for PCI devices behind bridges, | |
2303 | * because all PCI devices behind the same bridge will end up | |
2304 | * with the same source-id on their transactions. | |
2305 | * | |
2306 | * Practically speaking, we can't change things around for these | |
2307 | * devices at run-time, because we can't be sure there'll be no | |
2308 | * DMA transactions in flight for any of their siblings. | |
2309 | * | |
2310 | * So PCI devices (unless they're on the root bus) as well as | |
2311 | * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of | |
2312 | * the 1:1 domain, just in _case_ one of their siblings turns out | |
2313 | * not to be able to map all of memory. | |
2314 | */ | |
5f4d91a1 | 2315 | if (!pci_is_pcie(pdev)) { |
3dfc813d DW |
2316 | if (!pci_is_root_bus(pdev->bus)) |
2317 | return 0; | |
2318 | if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) | |
2319 | return 0; | |
2320 | } else if (pdev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
2321 | return 0; | |
2322 | ||
2323 | /* | |
2324 | * At boot time, we don't yet know if devices will be 64-bit capable. | |
2325 | * Assume that they will -- if they turn out not to be, then we can | |
2326 | * take them out of the 1:1 domain later. | |
2327 | */ | |
8fcc5372 CW |
2328 | if (!startup) { |
2329 | /* | |
2330 | * If the device's dma_mask is less than the system's memory | |
2331 | * size then this is not a candidate for identity mapping. | |
2332 | */ | |
2333 | u64 dma_mask = pdev->dma_mask; | |
2334 | ||
2335 | if (pdev->dev.coherent_dma_mask && | |
2336 | pdev->dev.coherent_dma_mask < dma_mask) | |
2337 | dma_mask = pdev->dev.coherent_dma_mask; | |
2338 | ||
2339 | return dma_mask >= dma_get_required_mask(&pdev->dev); | |
2340 | } | |
6941af28 DW |
2341 | |
2342 | return 1; | |
2343 | } | |
2344 | ||
071e1374 | 2345 | static int __init iommu_prepare_static_identity_mapping(int hw) |
2c2e2c38 | 2346 | { |
2c2e2c38 FY |
2347 | struct pci_dev *pdev = NULL; |
2348 | int ret; | |
2349 | ||
19943b0e | 2350 | ret = si_domain_init(hw); |
2c2e2c38 FY |
2351 | if (ret) |
2352 | return -EFAULT; | |
2353 | ||
2c2e2c38 | 2354 | for_each_pci_dev(pdev) { |
825507d6 MT |
2355 | /* Skip Host/PCI Bridge devices */ |
2356 | if (IS_BRIDGE_HOST_DEVICE(pdev)) | |
2357 | continue; | |
6941af28 | 2358 | if (iommu_should_identity_map(pdev, 1)) { |
19943b0e DW |
2359 | printk(KERN_INFO "IOMMU: %s identity mapping for device %s\n", |
2360 | hw ? "hardware" : "software", pci_name(pdev)); | |
62edf5dc | 2361 | |
5fe60f4e | 2362 | ret = domain_add_dev_info(si_domain, pdev, |
19943b0e | 2363 | hw ? CONTEXT_TT_PASS_THROUGH : |
62edf5dc DW |
2364 | CONTEXT_TT_MULTI_LEVEL); |
2365 | if (ret) | |
2366 | return ret; | |
62edf5dc | 2367 | } |
2c2e2c38 FY |
2368 | } |
2369 | ||
2370 | return 0; | |
2371 | } | |
2372 | ||
b779260b | 2373 | static int __init init_dmars(void) |
ba395927 KA |
2374 | { |
2375 | struct dmar_drhd_unit *drhd; | |
2376 | struct dmar_rmrr_unit *rmrr; | |
2377 | struct pci_dev *pdev; | |
2378 | struct intel_iommu *iommu; | |
9d783ba0 | 2379 | int i, ret; |
2c2e2c38 | 2380 | |
ba395927 KA |
2381 | /* |
2382 | * for each drhd | |
2383 | * allocate root | |
2384 | * initialize and program root entry to not present | |
2385 | * endfor | |
2386 | */ | |
2387 | for_each_drhd_unit(drhd) { | |
5e0d2a6f | 2388 | g_num_of_iommus++; |
2389 | /* | |
2390 | * lock not needed as this is only incremented in the single | |
2391 | * threaded kernel __init code path all other access are read | |
2392 | * only | |
2393 | */ | |
2394 | } | |
2395 | ||
d9630fe9 WH |
2396 | g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), |
2397 | GFP_KERNEL); | |
2398 | if (!g_iommus) { | |
2399 | printk(KERN_ERR "Allocating global iommu array failed\n"); | |
2400 | ret = -ENOMEM; | |
2401 | goto error; | |
2402 | } | |
2403 | ||
80b20dd8 | 2404 | deferred_flush = kzalloc(g_num_of_iommus * |
2405 | sizeof(struct deferred_flush_tables), GFP_KERNEL); | |
2406 | if (!deferred_flush) { | |
5e0d2a6f | 2407 | ret = -ENOMEM; |
2408 | goto error; | |
2409 | } | |
2410 | ||
5e0d2a6f | 2411 | for_each_drhd_unit(drhd) { |
2412 | if (drhd->ignored) | |
2413 | continue; | |
1886e8a9 SS |
2414 | |
2415 | iommu = drhd->iommu; | |
d9630fe9 | 2416 | g_iommus[iommu->seq_id] = iommu; |
ba395927 | 2417 | |
e61d98d8 SS |
2418 | ret = iommu_init_domains(iommu); |
2419 | if (ret) | |
2420 | goto error; | |
2421 | ||
ba395927 KA |
2422 | /* |
2423 | * TBD: | |
2424 | * we could share the same root & context tables | |
25985edc | 2425 | * among all IOMMU's. Need to Split it later. |
ba395927 KA |
2426 | */ |
2427 | ret = iommu_alloc_root_entry(iommu); | |
2428 | if (ret) { | |
2429 | printk(KERN_ERR "IOMMU: allocate root entry failed\n"); | |
2430 | goto error; | |
2431 | } | |
4ed0d3e6 | 2432 | if (!ecap_pass_through(iommu->ecap)) |
19943b0e | 2433 | hw_pass_through = 0; |
ba395927 KA |
2434 | } |
2435 | ||
1531a6a6 SS |
2436 | /* |
2437 | * Start from the sane iommu hardware state. | |
2438 | */ | |
a77b67d4 YS |
2439 | for_each_drhd_unit(drhd) { |
2440 | if (drhd->ignored) | |
2441 | continue; | |
2442 | ||
2443 | iommu = drhd->iommu; | |
1531a6a6 SS |
2444 | |
2445 | /* | |
2446 | * If the queued invalidation is already initialized by us | |
2447 | * (for example, while enabling interrupt-remapping) then | |
2448 | * we got the things already rolling from a sane state. | |
2449 | */ | |
2450 | if (iommu->qi) | |
2451 | continue; | |
2452 | ||
2453 | /* | |
2454 | * Clear any previous faults. | |
2455 | */ | |
2456 | dmar_fault(-1, iommu); | |
2457 | /* | |
2458 | * Disable queued invalidation if supported and already enabled | |
2459 | * before OS handover. | |
2460 | */ | |
2461 | dmar_disable_qi(iommu); | |
2462 | } | |
2463 | ||
2464 | for_each_drhd_unit(drhd) { | |
2465 | if (drhd->ignored) | |
2466 | continue; | |
2467 | ||
2468 | iommu = drhd->iommu; | |
2469 | ||
a77b67d4 YS |
2470 | if (dmar_enable_qi(iommu)) { |
2471 | /* | |
2472 | * Queued Invalidate not enabled, use Register Based | |
2473 | * Invalidate | |
2474 | */ | |
2475 | iommu->flush.flush_context = __iommu_flush_context; | |
2476 | iommu->flush.flush_iotlb = __iommu_flush_iotlb; | |
680a7524 | 2477 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Register based " |
b4e0f9eb | 2478 | "invalidation\n", |
680a7524 | 2479 | iommu->seq_id, |
b4e0f9eb | 2480 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2481 | } else { |
2482 | iommu->flush.flush_context = qi_flush_context; | |
2483 | iommu->flush.flush_iotlb = qi_flush_iotlb; | |
680a7524 | 2484 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Queued " |
b4e0f9eb | 2485 | "invalidation\n", |
680a7524 | 2486 | iommu->seq_id, |
b4e0f9eb | 2487 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2488 | } |
2489 | } | |
2490 | ||
19943b0e | 2491 | if (iommu_pass_through) |
e0fc7e0b DW |
2492 | iommu_identity_mapping |= IDENTMAP_ALL; |
2493 | ||
d3f13810 | 2494 | #ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA |
e0fc7e0b | 2495 | iommu_identity_mapping |= IDENTMAP_GFX; |
19943b0e | 2496 | #endif |
e0fc7e0b DW |
2497 | |
2498 | check_tylersburg_isoch(); | |
2499 | ||
ba395927 | 2500 | /* |
19943b0e DW |
2501 | * If pass through is not set or not enabled, setup context entries for |
2502 | * identity mappings for rmrr, gfx, and isa and may fall back to static | |
2503 | * identity mapping if iommu_identity_mapping is set. | |
ba395927 | 2504 | */ |
19943b0e DW |
2505 | if (iommu_identity_mapping) { |
2506 | ret = iommu_prepare_static_identity_mapping(hw_pass_through); | |
4ed0d3e6 | 2507 | if (ret) { |
19943b0e DW |
2508 | printk(KERN_CRIT "Failed to setup IOMMU pass-through\n"); |
2509 | goto error; | |
ba395927 KA |
2510 | } |
2511 | } | |
ba395927 | 2512 | /* |
19943b0e DW |
2513 | * For each rmrr |
2514 | * for each dev attached to rmrr | |
2515 | * do | |
2516 | * locate drhd for dev, alloc domain for dev | |
2517 | * allocate free domain | |
2518 | * allocate page table entries for rmrr | |
2519 | * if context not allocated for bus | |
2520 | * allocate and init context | |
2521 | * set present in root table for this bus | |
2522 | * init context with domain, translation etc | |
2523 | * endfor | |
2524 | * endfor | |
ba395927 | 2525 | */ |
19943b0e DW |
2526 | printk(KERN_INFO "IOMMU: Setting RMRR:\n"); |
2527 | for_each_rmrr_units(rmrr) { | |
2528 | for (i = 0; i < rmrr->devices_cnt; i++) { | |
2529 | pdev = rmrr->devices[i]; | |
2530 | /* | |
2531 | * some BIOS lists non-exist devices in DMAR | |
2532 | * table. | |
2533 | */ | |
2534 | if (!pdev) | |
2535 | continue; | |
2536 | ret = iommu_prepare_rmrr_dev(rmrr, pdev); | |
2537 | if (ret) | |
2538 | printk(KERN_ERR | |
2539 | "IOMMU: mapping reserved region failed\n"); | |
ba395927 | 2540 | } |
4ed0d3e6 | 2541 | } |
49a0429e | 2542 | |
19943b0e DW |
2543 | iommu_prepare_isa(); |
2544 | ||
ba395927 KA |
2545 | /* |
2546 | * for each drhd | |
2547 | * enable fault log | |
2548 | * global invalidate context cache | |
2549 | * global invalidate iotlb | |
2550 | * enable translation | |
2551 | */ | |
2552 | for_each_drhd_unit(drhd) { | |
51a63e67 JC |
2553 | if (drhd->ignored) { |
2554 | /* | |
2555 | * we always have to disable PMRs or DMA may fail on | |
2556 | * this device | |
2557 | */ | |
2558 | if (force_on) | |
2559 | iommu_disable_protect_mem_regions(drhd->iommu); | |
ba395927 | 2560 | continue; |
51a63e67 | 2561 | } |
ba395927 | 2562 | iommu = drhd->iommu; |
ba395927 KA |
2563 | |
2564 | iommu_flush_write_buffer(iommu); | |
2565 | ||
3460a6d9 KA |
2566 | ret = dmar_set_interrupt(iommu); |
2567 | if (ret) | |
2568 | goto error; | |
2569 | ||
ba395927 KA |
2570 | iommu_set_root_entry(iommu); |
2571 | ||
4c25a2c1 | 2572 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 2573 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
f8bab735 | 2574 | |
ba395927 KA |
2575 | ret = iommu_enable_translation(iommu); |
2576 | if (ret) | |
2577 | goto error; | |
b94996c9 DW |
2578 | |
2579 | iommu_disable_protect_mem_regions(iommu); | |
ba395927 KA |
2580 | } |
2581 | ||
2582 | return 0; | |
2583 | error: | |
2584 | for_each_drhd_unit(drhd) { | |
2585 | if (drhd->ignored) | |
2586 | continue; | |
2587 | iommu = drhd->iommu; | |
2588 | free_iommu(iommu); | |
2589 | } | |
d9630fe9 | 2590 | kfree(g_iommus); |
ba395927 KA |
2591 | return ret; |
2592 | } | |
2593 | ||
5a5e02a6 | 2594 | /* This takes a number of _MM_ pages, not VTD pages */ |
875764de DW |
2595 | static struct iova *intel_alloc_iova(struct device *dev, |
2596 | struct dmar_domain *domain, | |
2597 | unsigned long nrpages, uint64_t dma_mask) | |
ba395927 | 2598 | { |
ba395927 | 2599 | struct pci_dev *pdev = to_pci_dev(dev); |
ba395927 | 2600 | struct iova *iova = NULL; |
ba395927 | 2601 | |
875764de DW |
2602 | /* Restrict dma_mask to the width that the iommu can handle */ |
2603 | dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask); | |
2604 | ||
2605 | if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) { | |
ba395927 KA |
2606 | /* |
2607 | * First try to allocate an io virtual address in | |
284901a9 | 2608 | * DMA_BIT_MASK(32) and if that fails then try allocating |
3609801e | 2609 | * from higher range |
ba395927 | 2610 | */ |
875764de DW |
2611 | iova = alloc_iova(&domain->iovad, nrpages, |
2612 | IOVA_PFN(DMA_BIT_MASK(32)), 1); | |
2613 | if (iova) | |
2614 | return iova; | |
2615 | } | |
2616 | iova = alloc_iova(&domain->iovad, nrpages, IOVA_PFN(dma_mask), 1); | |
2617 | if (unlikely(!iova)) { | |
2618 | printk(KERN_ERR "Allocating %ld-page iova for %s failed", | |
2619 | nrpages, pci_name(pdev)); | |
f76aec76 KA |
2620 | return NULL; |
2621 | } | |
2622 | ||
2623 | return iova; | |
2624 | } | |
2625 | ||
147202aa | 2626 | static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) |
f76aec76 KA |
2627 | { |
2628 | struct dmar_domain *domain; | |
2629 | int ret; | |
2630 | ||
2631 | domain = get_domain_for_dev(pdev, | |
2632 | DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
2633 | if (!domain) { | |
2634 | printk(KERN_ERR | |
2635 | "Allocating domain for %s failed", pci_name(pdev)); | |
4fe05bbc | 2636 | return NULL; |
ba395927 KA |
2637 | } |
2638 | ||
2639 | /* make sure context mapping is ok */ | |
5331fe6f | 2640 | if (unlikely(!domain_context_mapped(pdev))) { |
4ed0d3e6 FY |
2641 | ret = domain_context_mapping(domain, pdev, |
2642 | CONTEXT_TT_MULTI_LEVEL); | |
f76aec76 KA |
2643 | if (ret) { |
2644 | printk(KERN_ERR | |
2645 | "Domain context map for %s failed", | |
2646 | pci_name(pdev)); | |
4fe05bbc | 2647 | return NULL; |
f76aec76 | 2648 | } |
ba395927 KA |
2649 | } |
2650 | ||
f76aec76 KA |
2651 | return domain; |
2652 | } | |
2653 | ||
147202aa DW |
2654 | static inline struct dmar_domain *get_valid_domain_for_dev(struct pci_dev *dev) |
2655 | { | |
2656 | struct device_domain_info *info; | |
2657 | ||
2658 | /* No lock here, assumes no domain exit in normal case */ | |
2659 | info = dev->dev.archdata.iommu; | |
2660 | if (likely(info)) | |
2661 | return info->domain; | |
2662 | ||
2663 | return __get_valid_domain_for_dev(dev); | |
2664 | } | |
2665 | ||
2c2e2c38 FY |
2666 | static int iommu_dummy(struct pci_dev *pdev) |
2667 | { | |
2668 | return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; | |
2669 | } | |
2670 | ||
2671 | /* Check if the pdev needs to go through non-identity map and unmap process.*/ | |
73676832 | 2672 | static int iommu_no_mapping(struct device *dev) |
2c2e2c38 | 2673 | { |
73676832 | 2674 | struct pci_dev *pdev; |
2c2e2c38 FY |
2675 | int found; |
2676 | ||
73676832 DW |
2677 | if (unlikely(dev->bus != &pci_bus_type)) |
2678 | return 1; | |
2679 | ||
2680 | pdev = to_pci_dev(dev); | |
1e4c64c4 DW |
2681 | if (iommu_dummy(pdev)) |
2682 | return 1; | |
2683 | ||
2c2e2c38 | 2684 | if (!iommu_identity_mapping) |
1e4c64c4 | 2685 | return 0; |
2c2e2c38 FY |
2686 | |
2687 | found = identity_mapping(pdev); | |
2688 | if (found) { | |
6941af28 | 2689 | if (iommu_should_identity_map(pdev, 0)) |
2c2e2c38 FY |
2690 | return 1; |
2691 | else { | |
2692 | /* | |
2693 | * 32 bit DMA is removed from si_domain and fall back | |
2694 | * to non-identity mapping. | |
2695 | */ | |
2696 | domain_remove_one_dev_info(si_domain, pdev); | |
2697 | printk(KERN_INFO "32bit %s uses non-identity mapping\n", | |
2698 | pci_name(pdev)); | |
2699 | return 0; | |
2700 | } | |
2701 | } else { | |
2702 | /* | |
2703 | * In case of a detached 64 bit DMA device from vm, the device | |
2704 | * is put into si_domain for identity mapping. | |
2705 | */ | |
6941af28 | 2706 | if (iommu_should_identity_map(pdev, 0)) { |
2c2e2c38 | 2707 | int ret; |
5fe60f4e DW |
2708 | ret = domain_add_dev_info(si_domain, pdev, |
2709 | hw_pass_through ? | |
2710 | CONTEXT_TT_PASS_THROUGH : | |
2711 | CONTEXT_TT_MULTI_LEVEL); | |
2c2e2c38 FY |
2712 | if (!ret) { |
2713 | printk(KERN_INFO "64bit %s uses identity mapping\n", | |
2714 | pci_name(pdev)); | |
2715 | return 1; | |
2716 | } | |
2717 | } | |
2718 | } | |
2719 | ||
1e4c64c4 | 2720 | return 0; |
2c2e2c38 FY |
2721 | } |
2722 | ||
bb9e6d65 FT |
2723 | static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, |
2724 | size_t size, int dir, u64 dma_mask) | |
f76aec76 KA |
2725 | { |
2726 | struct pci_dev *pdev = to_pci_dev(hwdev); | |
f76aec76 | 2727 | struct dmar_domain *domain; |
5b6985ce | 2728 | phys_addr_t start_paddr; |
f76aec76 KA |
2729 | struct iova *iova; |
2730 | int prot = 0; | |
6865f0d1 | 2731 | int ret; |
8c11e798 | 2732 | struct intel_iommu *iommu; |
33041ec0 | 2733 | unsigned long paddr_pfn = paddr >> PAGE_SHIFT; |
f76aec76 KA |
2734 | |
2735 | BUG_ON(dir == DMA_NONE); | |
2c2e2c38 | 2736 | |
73676832 | 2737 | if (iommu_no_mapping(hwdev)) |
6865f0d1 | 2738 | return paddr; |
f76aec76 KA |
2739 | |
2740 | domain = get_valid_domain_for_dev(pdev); | |
2741 | if (!domain) | |
2742 | return 0; | |
2743 | ||
8c11e798 | 2744 | iommu = domain_get_iommu(domain); |
88cb6a74 | 2745 | size = aligned_nrpages(paddr, size); |
f76aec76 | 2746 | |
c681d0ba | 2747 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), dma_mask); |
f76aec76 KA |
2748 | if (!iova) |
2749 | goto error; | |
2750 | ||
ba395927 KA |
2751 | /* |
2752 | * Check if DMAR supports zero-length reads on write only | |
2753 | * mappings.. | |
2754 | */ | |
2755 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2756 | !cap_zlr(iommu->cap)) |
ba395927 KA |
2757 | prot |= DMA_PTE_READ; |
2758 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2759 | prot |= DMA_PTE_WRITE; | |
2760 | /* | |
6865f0d1 | 2761 | * paddr - (paddr + size) might be partial page, we should map the whole |
ba395927 | 2762 | * page. Note: if two part of one page are separately mapped, we |
6865f0d1 | 2763 | * might have two guest_addr mapping to the same host paddr, but this |
ba395927 KA |
2764 | * is not a big problem |
2765 | */ | |
0ab36de2 | 2766 | ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo), |
33041ec0 | 2767 | mm_to_dma_pfn(paddr_pfn), size, prot); |
ba395927 KA |
2768 | if (ret) |
2769 | goto error; | |
2770 | ||
1f0ef2aa DW |
2771 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2772 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 2773 | iommu_flush_iotlb_psi(iommu, domain->id, mm_to_dma_pfn(iova->pfn_lo), size, 1); |
1f0ef2aa | 2774 | else |
8c11e798 | 2775 | iommu_flush_write_buffer(iommu); |
f76aec76 | 2776 | |
03d6a246 DW |
2777 | start_paddr = (phys_addr_t)iova->pfn_lo << PAGE_SHIFT; |
2778 | start_paddr += paddr & ~PAGE_MASK; | |
2779 | return start_paddr; | |
ba395927 | 2780 | |
ba395927 | 2781 | error: |
f76aec76 KA |
2782 | if (iova) |
2783 | __free_iova(&domain->iovad, iova); | |
4cf2e75d | 2784 | printk(KERN_ERR"Device %s request: %zx@%llx dir %d --- failed\n", |
5b6985ce | 2785 | pci_name(pdev), size, (unsigned long long)paddr, dir); |
ba395927 KA |
2786 | return 0; |
2787 | } | |
2788 | ||
ffbbef5c FT |
2789 | static dma_addr_t intel_map_page(struct device *dev, struct page *page, |
2790 | unsigned long offset, size_t size, | |
2791 | enum dma_data_direction dir, | |
2792 | struct dma_attrs *attrs) | |
bb9e6d65 | 2793 | { |
ffbbef5c FT |
2794 | return __intel_map_single(dev, page_to_phys(page) + offset, size, |
2795 | dir, to_pci_dev(dev)->dma_mask); | |
bb9e6d65 FT |
2796 | } |
2797 | ||
5e0d2a6f | 2798 | static void flush_unmaps(void) |
2799 | { | |
80b20dd8 | 2800 | int i, j; |
5e0d2a6f | 2801 | |
5e0d2a6f | 2802 | timer_on = 0; |
2803 | ||
2804 | /* just flush them all */ | |
2805 | for (i = 0; i < g_num_of_iommus; i++) { | |
a2bb8459 WH |
2806 | struct intel_iommu *iommu = g_iommus[i]; |
2807 | if (!iommu) | |
2808 | continue; | |
c42d9f32 | 2809 | |
9dd2fe89 YZ |
2810 | if (!deferred_flush[i].next) |
2811 | continue; | |
2812 | ||
78d5f0f5 NA |
2813 | /* In caching mode, global flushes turn emulation expensive */ |
2814 | if (!cap_caching_mode(iommu->cap)) | |
2815 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, | |
93a23a72 | 2816 | DMA_TLB_GLOBAL_FLUSH); |
9dd2fe89 | 2817 | for (j = 0; j < deferred_flush[i].next; j++) { |
93a23a72 YZ |
2818 | unsigned long mask; |
2819 | struct iova *iova = deferred_flush[i].iova[j]; | |
78d5f0f5 NA |
2820 | struct dmar_domain *domain = deferred_flush[i].domain[j]; |
2821 | ||
2822 | /* On real hardware multiple invalidations are expensive */ | |
2823 | if (cap_caching_mode(iommu->cap)) | |
2824 | iommu_flush_iotlb_psi(iommu, domain->id, | |
2825 | iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1, 0); | |
2826 | else { | |
2827 | mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1)); | |
2828 | iommu_flush_dev_iotlb(deferred_flush[i].domain[j], | |
2829 | (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); | |
2830 | } | |
93a23a72 | 2831 | __free_iova(&deferred_flush[i].domain[j]->iovad, iova); |
80b20dd8 | 2832 | } |
9dd2fe89 | 2833 | deferred_flush[i].next = 0; |
5e0d2a6f | 2834 | } |
2835 | ||
5e0d2a6f | 2836 | list_size = 0; |
5e0d2a6f | 2837 | } |
2838 | ||
2839 | static void flush_unmaps_timeout(unsigned long data) | |
2840 | { | |
80b20dd8 | 2841 | unsigned long flags; |
2842 | ||
2843 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
5e0d2a6f | 2844 | flush_unmaps(); |
80b20dd8 | 2845 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); |
5e0d2a6f | 2846 | } |
2847 | ||
2848 | static void add_unmap(struct dmar_domain *dom, struct iova *iova) | |
2849 | { | |
2850 | unsigned long flags; | |
80b20dd8 | 2851 | int next, iommu_id; |
8c11e798 | 2852 | struct intel_iommu *iommu; |
5e0d2a6f | 2853 | |
2854 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
80b20dd8 | 2855 | if (list_size == HIGH_WATER_MARK) |
2856 | flush_unmaps(); | |
2857 | ||
8c11e798 WH |
2858 | iommu = domain_get_iommu(dom); |
2859 | iommu_id = iommu->seq_id; | |
c42d9f32 | 2860 | |
80b20dd8 | 2861 | next = deferred_flush[iommu_id].next; |
2862 | deferred_flush[iommu_id].domain[next] = dom; | |
2863 | deferred_flush[iommu_id].iova[next] = iova; | |
2864 | deferred_flush[iommu_id].next++; | |
5e0d2a6f | 2865 | |
2866 | if (!timer_on) { | |
2867 | mod_timer(&unmap_timer, jiffies + msecs_to_jiffies(10)); | |
2868 | timer_on = 1; | |
2869 | } | |
2870 | list_size++; | |
2871 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); | |
2872 | } | |
2873 | ||
ffbbef5c FT |
2874 | static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, |
2875 | size_t size, enum dma_data_direction dir, | |
2876 | struct dma_attrs *attrs) | |
ba395927 | 2877 | { |
ba395927 | 2878 | struct pci_dev *pdev = to_pci_dev(dev); |
f76aec76 | 2879 | struct dmar_domain *domain; |
d794dc9b | 2880 | unsigned long start_pfn, last_pfn; |
ba395927 | 2881 | struct iova *iova; |
8c11e798 | 2882 | struct intel_iommu *iommu; |
ba395927 | 2883 | |
73676832 | 2884 | if (iommu_no_mapping(dev)) |
f76aec76 | 2885 | return; |
2c2e2c38 | 2886 | |
ba395927 KA |
2887 | domain = find_domain(pdev); |
2888 | BUG_ON(!domain); | |
2889 | ||
8c11e798 WH |
2890 | iommu = domain_get_iommu(domain); |
2891 | ||
ba395927 | 2892 | iova = find_iova(&domain->iovad, IOVA_PFN(dev_addr)); |
85b98276 DW |
2893 | if (WARN_ONCE(!iova, "Driver unmaps unmatched page at PFN %llx\n", |
2894 | (unsigned long long)dev_addr)) | |
ba395927 | 2895 | return; |
ba395927 | 2896 | |
d794dc9b DW |
2897 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2898 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
ba395927 | 2899 | |
d794dc9b DW |
2900 | pr_debug("Device %s unmapping: pfn %lx-%lx\n", |
2901 | pci_name(pdev), start_pfn, last_pfn); | |
ba395927 | 2902 | |
f76aec76 | 2903 | /* clear the whole page */ |
d794dc9b DW |
2904 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2905 | ||
f76aec76 | 2906 | /* free page tables */ |
d794dc9b DW |
2907 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
2908 | ||
5e0d2a6f | 2909 | if (intel_iommu_strict) { |
03d6a246 | 2910 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, |
82653633 | 2911 | last_pfn - start_pfn + 1, 0); |
5e0d2a6f | 2912 | /* free iova */ |
2913 | __free_iova(&domain->iovad, iova); | |
2914 | } else { | |
2915 | add_unmap(domain, iova); | |
2916 | /* | |
2917 | * queue up the release of the unmap to save the 1/6th of the | |
2918 | * cpu used up by the iotlb flush operation... | |
2919 | */ | |
5e0d2a6f | 2920 | } |
ba395927 KA |
2921 | } |
2922 | ||
d7ab5c46 FT |
2923 | static void *intel_alloc_coherent(struct device *hwdev, size_t size, |
2924 | dma_addr_t *dma_handle, gfp_t flags) | |
ba395927 KA |
2925 | { |
2926 | void *vaddr; | |
2927 | int order; | |
2928 | ||
5b6985ce | 2929 | size = PAGE_ALIGN(size); |
ba395927 | 2930 | order = get_order(size); |
e8bb910d AW |
2931 | |
2932 | if (!iommu_no_mapping(hwdev)) | |
2933 | flags &= ~(GFP_DMA | GFP_DMA32); | |
2934 | else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) { | |
2935 | if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32)) | |
2936 | flags |= GFP_DMA; | |
2937 | else | |
2938 | flags |= GFP_DMA32; | |
2939 | } | |
ba395927 KA |
2940 | |
2941 | vaddr = (void *)__get_free_pages(flags, order); | |
2942 | if (!vaddr) | |
2943 | return NULL; | |
2944 | memset(vaddr, 0, size); | |
2945 | ||
bb9e6d65 FT |
2946 | *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size, |
2947 | DMA_BIDIRECTIONAL, | |
2948 | hwdev->coherent_dma_mask); | |
ba395927 KA |
2949 | if (*dma_handle) |
2950 | return vaddr; | |
2951 | free_pages((unsigned long)vaddr, order); | |
2952 | return NULL; | |
2953 | } | |
2954 | ||
d7ab5c46 FT |
2955 | static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr, |
2956 | dma_addr_t dma_handle) | |
ba395927 KA |
2957 | { |
2958 | int order; | |
2959 | ||
5b6985ce | 2960 | size = PAGE_ALIGN(size); |
ba395927 KA |
2961 | order = get_order(size); |
2962 | ||
0db9b7ae | 2963 | intel_unmap_page(hwdev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); |
ba395927 KA |
2964 | free_pages((unsigned long)vaddr, order); |
2965 | } | |
2966 | ||
d7ab5c46 FT |
2967 | static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, |
2968 | int nelems, enum dma_data_direction dir, | |
2969 | struct dma_attrs *attrs) | |
ba395927 | 2970 | { |
ba395927 KA |
2971 | struct pci_dev *pdev = to_pci_dev(hwdev); |
2972 | struct dmar_domain *domain; | |
d794dc9b | 2973 | unsigned long start_pfn, last_pfn; |
f76aec76 | 2974 | struct iova *iova; |
8c11e798 | 2975 | struct intel_iommu *iommu; |
ba395927 | 2976 | |
73676832 | 2977 | if (iommu_no_mapping(hwdev)) |
ba395927 KA |
2978 | return; |
2979 | ||
2980 | domain = find_domain(pdev); | |
8c11e798 WH |
2981 | BUG_ON(!domain); |
2982 | ||
2983 | iommu = domain_get_iommu(domain); | |
ba395927 | 2984 | |
c03ab37c | 2985 | iova = find_iova(&domain->iovad, IOVA_PFN(sglist[0].dma_address)); |
85b98276 DW |
2986 | if (WARN_ONCE(!iova, "Driver unmaps unmatched sglist at PFN %llx\n", |
2987 | (unsigned long long)sglist[0].dma_address)) | |
f76aec76 | 2988 | return; |
f76aec76 | 2989 | |
d794dc9b DW |
2990 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2991 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
f76aec76 KA |
2992 | |
2993 | /* clear the whole page */ | |
d794dc9b DW |
2994 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2995 | ||
f76aec76 | 2996 | /* free page tables */ |
d794dc9b | 2997 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
f76aec76 | 2998 | |
acea0018 DW |
2999 | if (intel_iommu_strict) { |
3000 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, | |
82653633 | 3001 | last_pfn - start_pfn + 1, 0); |
acea0018 DW |
3002 | /* free iova */ |
3003 | __free_iova(&domain->iovad, iova); | |
3004 | } else { | |
3005 | add_unmap(domain, iova); | |
3006 | /* | |
3007 | * queue up the release of the unmap to save the 1/6th of the | |
3008 | * cpu used up by the iotlb flush operation... | |
3009 | */ | |
3010 | } | |
ba395927 KA |
3011 | } |
3012 | ||
ba395927 | 3013 | static int intel_nontranslate_map_sg(struct device *hddev, |
c03ab37c | 3014 | struct scatterlist *sglist, int nelems, int dir) |
ba395927 KA |
3015 | { |
3016 | int i; | |
c03ab37c | 3017 | struct scatterlist *sg; |
ba395927 | 3018 | |
c03ab37c | 3019 | for_each_sg(sglist, sg, nelems, i) { |
12d4d40e | 3020 | BUG_ON(!sg_page(sg)); |
4cf2e75d | 3021 | sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset; |
c03ab37c | 3022 | sg->dma_length = sg->length; |
ba395927 KA |
3023 | } |
3024 | return nelems; | |
3025 | } | |
3026 | ||
d7ab5c46 FT |
3027 | static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems, |
3028 | enum dma_data_direction dir, struct dma_attrs *attrs) | |
ba395927 | 3029 | { |
ba395927 | 3030 | int i; |
ba395927 KA |
3031 | struct pci_dev *pdev = to_pci_dev(hwdev); |
3032 | struct dmar_domain *domain; | |
f76aec76 KA |
3033 | size_t size = 0; |
3034 | int prot = 0; | |
f76aec76 KA |
3035 | struct iova *iova = NULL; |
3036 | int ret; | |
c03ab37c | 3037 | struct scatterlist *sg; |
b536d24d | 3038 | unsigned long start_vpfn; |
8c11e798 | 3039 | struct intel_iommu *iommu; |
ba395927 KA |
3040 | |
3041 | BUG_ON(dir == DMA_NONE); | |
73676832 | 3042 | if (iommu_no_mapping(hwdev)) |
c03ab37c | 3043 | return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir); |
ba395927 | 3044 | |
f76aec76 KA |
3045 | domain = get_valid_domain_for_dev(pdev); |
3046 | if (!domain) | |
3047 | return 0; | |
3048 | ||
8c11e798 WH |
3049 | iommu = domain_get_iommu(domain); |
3050 | ||
b536d24d | 3051 | for_each_sg(sglist, sg, nelems, i) |
88cb6a74 | 3052 | size += aligned_nrpages(sg->offset, sg->length); |
f76aec76 | 3053 | |
5a5e02a6 DW |
3054 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
3055 | pdev->dma_mask); | |
f76aec76 | 3056 | if (!iova) { |
c03ab37c | 3057 | sglist->dma_length = 0; |
f76aec76 KA |
3058 | return 0; |
3059 | } | |
3060 | ||
3061 | /* | |
3062 | * Check if DMAR supports zero-length reads on write only | |
3063 | * mappings.. | |
3064 | */ | |
3065 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 3066 | !cap_zlr(iommu->cap)) |
f76aec76 KA |
3067 | prot |= DMA_PTE_READ; |
3068 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
3069 | prot |= DMA_PTE_WRITE; | |
3070 | ||
b536d24d | 3071 | start_vpfn = mm_to_dma_pfn(iova->pfn_lo); |
e1605495 | 3072 | |
f532959b | 3073 | ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot); |
e1605495 DW |
3074 | if (unlikely(ret)) { |
3075 | /* clear the page */ | |
3076 | dma_pte_clear_range(domain, start_vpfn, | |
3077 | start_vpfn + size - 1); | |
3078 | /* free page tables */ | |
3079 | dma_pte_free_pagetable(domain, start_vpfn, | |
3080 | start_vpfn + size - 1); | |
3081 | /* free iova */ | |
3082 | __free_iova(&domain->iovad, iova); | |
3083 | return 0; | |
ba395927 KA |
3084 | } |
3085 | ||
1f0ef2aa DW |
3086 | /* it's a non-present to present mapping. Only flush if caching mode */ |
3087 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 3088 | iommu_flush_iotlb_psi(iommu, domain->id, start_vpfn, size, 1); |
1f0ef2aa | 3089 | else |
8c11e798 | 3090 | iommu_flush_write_buffer(iommu); |
1f0ef2aa | 3091 | |
ba395927 KA |
3092 | return nelems; |
3093 | } | |
3094 | ||
dfb805e8 FT |
3095 | static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) |
3096 | { | |
3097 | return !dma_addr; | |
3098 | } | |
3099 | ||
160c1d8e | 3100 | struct dma_map_ops intel_dma_ops = { |
ba395927 KA |
3101 | .alloc_coherent = intel_alloc_coherent, |
3102 | .free_coherent = intel_free_coherent, | |
ba395927 KA |
3103 | .map_sg = intel_map_sg, |
3104 | .unmap_sg = intel_unmap_sg, | |
ffbbef5c FT |
3105 | .map_page = intel_map_page, |
3106 | .unmap_page = intel_unmap_page, | |
dfb805e8 | 3107 | .mapping_error = intel_mapping_error, |
ba395927 KA |
3108 | }; |
3109 | ||
3110 | static inline int iommu_domain_cache_init(void) | |
3111 | { | |
3112 | int ret = 0; | |
3113 | ||
3114 | iommu_domain_cache = kmem_cache_create("iommu_domain", | |
3115 | sizeof(struct dmar_domain), | |
3116 | 0, | |
3117 | SLAB_HWCACHE_ALIGN, | |
3118 | ||
3119 | NULL); | |
3120 | if (!iommu_domain_cache) { | |
3121 | printk(KERN_ERR "Couldn't create iommu_domain cache\n"); | |
3122 | ret = -ENOMEM; | |
3123 | } | |
3124 | ||
3125 | return ret; | |
3126 | } | |
3127 | ||
3128 | static inline int iommu_devinfo_cache_init(void) | |
3129 | { | |
3130 | int ret = 0; | |
3131 | ||
3132 | iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", | |
3133 | sizeof(struct device_domain_info), | |
3134 | 0, | |
3135 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
3136 | NULL); |
3137 | if (!iommu_devinfo_cache) { | |
3138 | printk(KERN_ERR "Couldn't create devinfo cache\n"); | |
3139 | ret = -ENOMEM; | |
3140 | } | |
3141 | ||
3142 | return ret; | |
3143 | } | |
3144 | ||
3145 | static inline int iommu_iova_cache_init(void) | |
3146 | { | |
3147 | int ret = 0; | |
3148 | ||
3149 | iommu_iova_cache = kmem_cache_create("iommu_iova", | |
3150 | sizeof(struct iova), | |
3151 | 0, | |
3152 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
3153 | NULL); |
3154 | if (!iommu_iova_cache) { | |
3155 | printk(KERN_ERR "Couldn't create iova cache\n"); | |
3156 | ret = -ENOMEM; | |
3157 | } | |
3158 | ||
3159 | return ret; | |
3160 | } | |
3161 | ||
3162 | static int __init iommu_init_mempool(void) | |
3163 | { | |
3164 | int ret; | |
3165 | ret = iommu_iova_cache_init(); | |
3166 | if (ret) | |
3167 | return ret; | |
3168 | ||
3169 | ret = iommu_domain_cache_init(); | |
3170 | if (ret) | |
3171 | goto domain_error; | |
3172 | ||
3173 | ret = iommu_devinfo_cache_init(); | |
3174 | if (!ret) | |
3175 | return ret; | |
3176 | ||
3177 | kmem_cache_destroy(iommu_domain_cache); | |
3178 | domain_error: | |
3179 | kmem_cache_destroy(iommu_iova_cache); | |
3180 | ||
3181 | return -ENOMEM; | |
3182 | } | |
3183 | ||
3184 | static void __init iommu_exit_mempool(void) | |
3185 | { | |
3186 | kmem_cache_destroy(iommu_devinfo_cache); | |
3187 | kmem_cache_destroy(iommu_domain_cache); | |
3188 | kmem_cache_destroy(iommu_iova_cache); | |
3189 | ||
3190 | } | |
3191 | ||
556ab45f DW |
3192 | static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) |
3193 | { | |
3194 | struct dmar_drhd_unit *drhd; | |
3195 | u32 vtbar; | |
3196 | int rc; | |
3197 | ||
3198 | /* We know that this device on this chipset has its own IOMMU. | |
3199 | * If we find it under a different IOMMU, then the BIOS is lying | |
3200 | * to us. Hope that the IOMMU for this device is actually | |
3201 | * disabled, and it needs no translation... | |
3202 | */ | |
3203 | rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar); | |
3204 | if (rc) { | |
3205 | /* "can't" happen */ | |
3206 | dev_info(&pdev->dev, "failed to run vt-d quirk\n"); | |
3207 | return; | |
3208 | } | |
3209 | vtbar &= 0xffff0000; | |
3210 | ||
3211 | /* we know that the this iommu should be at offset 0xa000 from vtbar */ | |
3212 | drhd = dmar_find_matched_drhd_unit(pdev); | |
3213 | if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000, | |
3214 | TAINT_FIRMWARE_WORKAROUND, | |
3215 | "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n")) | |
3216 | pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
3217 | } | |
3218 | DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); | |
3219 | ||
ba395927 KA |
3220 | static void __init init_no_remapping_devices(void) |
3221 | { | |
3222 | struct dmar_drhd_unit *drhd; | |
3223 | ||
3224 | for_each_drhd_unit(drhd) { | |
3225 | if (!drhd->include_all) { | |
3226 | int i; | |
3227 | for (i = 0; i < drhd->devices_cnt; i++) | |
3228 | if (drhd->devices[i] != NULL) | |
3229 | break; | |
3230 | /* ignore DMAR unit if no pci devices exist */ | |
3231 | if (i == drhd->devices_cnt) | |
3232 | drhd->ignored = 1; | |
3233 | } | |
3234 | } | |
3235 | ||
ba395927 KA |
3236 | for_each_drhd_unit(drhd) { |
3237 | int i; | |
3238 | if (drhd->ignored || drhd->include_all) | |
3239 | continue; | |
3240 | ||
3241 | for (i = 0; i < drhd->devices_cnt; i++) | |
3242 | if (drhd->devices[i] && | |
c0771df8 | 3243 | !IS_GFX_DEVICE(drhd->devices[i])) |
ba395927 KA |
3244 | break; |
3245 | ||
3246 | if (i < drhd->devices_cnt) | |
3247 | continue; | |
3248 | ||
c0771df8 DW |
3249 | /* This IOMMU has *only* gfx devices. Either bypass it or |
3250 | set the gfx_mapped flag, as appropriate */ | |
3251 | if (dmar_map_gfx) { | |
3252 | intel_iommu_gfx_mapped = 1; | |
3253 | } else { | |
3254 | drhd->ignored = 1; | |
3255 | for (i = 0; i < drhd->devices_cnt; i++) { | |
3256 | if (!drhd->devices[i]) | |
3257 | continue; | |
3258 | drhd->devices[i]->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
3259 | } | |
ba395927 KA |
3260 | } |
3261 | } | |
3262 | } | |
3263 | ||
f59c7b69 FY |
3264 | #ifdef CONFIG_SUSPEND |
3265 | static int init_iommu_hw(void) | |
3266 | { | |
3267 | struct dmar_drhd_unit *drhd; | |
3268 | struct intel_iommu *iommu = NULL; | |
3269 | ||
3270 | for_each_active_iommu(iommu, drhd) | |
3271 | if (iommu->qi) | |
3272 | dmar_reenable_qi(iommu); | |
3273 | ||
b779260b JC |
3274 | for_each_iommu(iommu, drhd) { |
3275 | if (drhd->ignored) { | |
3276 | /* | |
3277 | * we always have to disable PMRs or DMA may fail on | |
3278 | * this device | |
3279 | */ | |
3280 | if (force_on) | |
3281 | iommu_disable_protect_mem_regions(iommu); | |
3282 | continue; | |
3283 | } | |
3284 | ||
f59c7b69 FY |
3285 | iommu_flush_write_buffer(iommu); |
3286 | ||
3287 | iommu_set_root_entry(iommu); | |
3288 | ||
3289 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3290 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3291 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3292 | DMA_TLB_GLOBAL_FLUSH); |
b779260b JC |
3293 | if (iommu_enable_translation(iommu)) |
3294 | return 1; | |
b94996c9 | 3295 | iommu_disable_protect_mem_regions(iommu); |
f59c7b69 FY |
3296 | } |
3297 | ||
3298 | return 0; | |
3299 | } | |
3300 | ||
3301 | static void iommu_flush_all(void) | |
3302 | { | |
3303 | struct dmar_drhd_unit *drhd; | |
3304 | struct intel_iommu *iommu; | |
3305 | ||
3306 | for_each_active_iommu(iommu, drhd) { | |
3307 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3308 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3309 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3310 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 FY |
3311 | } |
3312 | } | |
3313 | ||
134fac3f | 3314 | static int iommu_suspend(void) |
f59c7b69 FY |
3315 | { |
3316 | struct dmar_drhd_unit *drhd; | |
3317 | struct intel_iommu *iommu = NULL; | |
3318 | unsigned long flag; | |
3319 | ||
3320 | for_each_active_iommu(iommu, drhd) { | |
3321 | iommu->iommu_state = kzalloc(sizeof(u32) * MAX_SR_DMAR_REGS, | |
3322 | GFP_ATOMIC); | |
3323 | if (!iommu->iommu_state) | |
3324 | goto nomem; | |
3325 | } | |
3326 | ||
3327 | iommu_flush_all(); | |
3328 | ||
3329 | for_each_active_iommu(iommu, drhd) { | |
3330 | iommu_disable_translation(iommu); | |
3331 | ||
1f5b3c3f | 3332 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
3333 | |
3334 | iommu->iommu_state[SR_DMAR_FECTL_REG] = | |
3335 | readl(iommu->reg + DMAR_FECTL_REG); | |
3336 | iommu->iommu_state[SR_DMAR_FEDATA_REG] = | |
3337 | readl(iommu->reg + DMAR_FEDATA_REG); | |
3338 | iommu->iommu_state[SR_DMAR_FEADDR_REG] = | |
3339 | readl(iommu->reg + DMAR_FEADDR_REG); | |
3340 | iommu->iommu_state[SR_DMAR_FEUADDR_REG] = | |
3341 | readl(iommu->reg + DMAR_FEUADDR_REG); | |
3342 | ||
1f5b3c3f | 3343 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
3344 | } |
3345 | return 0; | |
3346 | ||
3347 | nomem: | |
3348 | for_each_active_iommu(iommu, drhd) | |
3349 | kfree(iommu->iommu_state); | |
3350 | ||
3351 | return -ENOMEM; | |
3352 | } | |
3353 | ||
134fac3f | 3354 | static void iommu_resume(void) |
f59c7b69 FY |
3355 | { |
3356 | struct dmar_drhd_unit *drhd; | |
3357 | struct intel_iommu *iommu = NULL; | |
3358 | unsigned long flag; | |
3359 | ||
3360 | if (init_iommu_hw()) { | |
b779260b JC |
3361 | if (force_on) |
3362 | panic("tboot: IOMMU setup failed, DMAR can not resume!\n"); | |
3363 | else | |
3364 | WARN(1, "IOMMU setup failed, DMAR can not resume!\n"); | |
134fac3f | 3365 | return; |
f59c7b69 FY |
3366 | } |
3367 | ||
3368 | for_each_active_iommu(iommu, drhd) { | |
3369 | ||
1f5b3c3f | 3370 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
3371 | |
3372 | writel(iommu->iommu_state[SR_DMAR_FECTL_REG], | |
3373 | iommu->reg + DMAR_FECTL_REG); | |
3374 | writel(iommu->iommu_state[SR_DMAR_FEDATA_REG], | |
3375 | iommu->reg + DMAR_FEDATA_REG); | |
3376 | writel(iommu->iommu_state[SR_DMAR_FEADDR_REG], | |
3377 | iommu->reg + DMAR_FEADDR_REG); | |
3378 | writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], | |
3379 | iommu->reg + DMAR_FEUADDR_REG); | |
3380 | ||
1f5b3c3f | 3381 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
3382 | } |
3383 | ||
3384 | for_each_active_iommu(iommu, drhd) | |
3385 | kfree(iommu->iommu_state); | |
f59c7b69 FY |
3386 | } |
3387 | ||
134fac3f | 3388 | static struct syscore_ops iommu_syscore_ops = { |
f59c7b69 FY |
3389 | .resume = iommu_resume, |
3390 | .suspend = iommu_suspend, | |
3391 | }; | |
3392 | ||
134fac3f | 3393 | static void __init init_iommu_pm_ops(void) |
f59c7b69 | 3394 | { |
134fac3f | 3395 | register_syscore_ops(&iommu_syscore_ops); |
f59c7b69 FY |
3396 | } |
3397 | ||
3398 | #else | |
99592ba4 | 3399 | static inline void init_iommu_pm_ops(void) {} |
f59c7b69 FY |
3400 | #endif /* CONFIG_PM */ |
3401 | ||
318fe7df SS |
3402 | LIST_HEAD(dmar_rmrr_units); |
3403 | ||
3404 | static void __init dmar_register_rmrr_unit(struct dmar_rmrr_unit *rmrr) | |
3405 | { | |
3406 | list_add(&rmrr->list, &dmar_rmrr_units); | |
3407 | } | |
3408 | ||
3409 | ||
3410 | int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header) | |
3411 | { | |
3412 | struct acpi_dmar_reserved_memory *rmrr; | |
3413 | struct dmar_rmrr_unit *rmrru; | |
3414 | ||
3415 | rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL); | |
3416 | if (!rmrru) | |
3417 | return -ENOMEM; | |
3418 | ||
3419 | rmrru->hdr = header; | |
3420 | rmrr = (struct acpi_dmar_reserved_memory *)header; | |
3421 | rmrru->base_address = rmrr->base_address; | |
3422 | rmrru->end_address = rmrr->end_address; | |
3423 | ||
3424 | dmar_register_rmrr_unit(rmrru); | |
3425 | return 0; | |
3426 | } | |
3427 | ||
3428 | static int __init | |
3429 | rmrr_parse_dev(struct dmar_rmrr_unit *rmrru) | |
3430 | { | |
3431 | struct acpi_dmar_reserved_memory *rmrr; | |
3432 | int ret; | |
3433 | ||
3434 | rmrr = (struct acpi_dmar_reserved_memory *) rmrru->hdr; | |
3435 | ret = dmar_parse_dev_scope((void *)(rmrr + 1), | |
3436 | ((void *)rmrr) + rmrr->header.length, | |
3437 | &rmrru->devices_cnt, &rmrru->devices, rmrr->segment); | |
3438 | ||
3439 | if (ret || (rmrru->devices_cnt == 0)) { | |
3440 | list_del(&rmrru->list); | |
3441 | kfree(rmrru); | |
3442 | } | |
3443 | return ret; | |
3444 | } | |
3445 | ||
3446 | static LIST_HEAD(dmar_atsr_units); | |
3447 | ||
3448 | int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) | |
3449 | { | |
3450 | struct acpi_dmar_atsr *atsr; | |
3451 | struct dmar_atsr_unit *atsru; | |
3452 | ||
3453 | atsr = container_of(hdr, struct acpi_dmar_atsr, header); | |
3454 | atsru = kzalloc(sizeof(*atsru), GFP_KERNEL); | |
3455 | if (!atsru) | |
3456 | return -ENOMEM; | |
3457 | ||
3458 | atsru->hdr = hdr; | |
3459 | atsru->include_all = atsr->flags & 0x1; | |
3460 | ||
3461 | list_add(&atsru->list, &dmar_atsr_units); | |
3462 | ||
3463 | return 0; | |
3464 | } | |
3465 | ||
3466 | static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru) | |
3467 | { | |
3468 | int rc; | |
3469 | struct acpi_dmar_atsr *atsr; | |
3470 | ||
3471 | if (atsru->include_all) | |
3472 | return 0; | |
3473 | ||
3474 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
3475 | rc = dmar_parse_dev_scope((void *)(atsr + 1), | |
3476 | (void *)atsr + atsr->header.length, | |
3477 | &atsru->devices_cnt, &atsru->devices, | |
3478 | atsr->segment); | |
3479 | if (rc || !atsru->devices_cnt) { | |
3480 | list_del(&atsru->list); | |
3481 | kfree(atsru); | |
3482 | } | |
3483 | ||
3484 | return rc; | |
3485 | } | |
3486 | ||
3487 | int dmar_find_matched_atsr_unit(struct pci_dev *dev) | |
3488 | { | |
3489 | int i; | |
3490 | struct pci_bus *bus; | |
3491 | struct acpi_dmar_atsr *atsr; | |
3492 | struct dmar_atsr_unit *atsru; | |
3493 | ||
3494 | dev = pci_physfn(dev); | |
3495 | ||
3496 | list_for_each_entry(atsru, &dmar_atsr_units, list) { | |
3497 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
3498 | if (atsr->segment == pci_domain_nr(dev->bus)) | |
3499 | goto found; | |
3500 | } | |
3501 | ||
3502 | return 0; | |
3503 | ||
3504 | found: | |
3505 | for (bus = dev->bus; bus; bus = bus->parent) { | |
3506 | struct pci_dev *bridge = bus->self; | |
3507 | ||
3508 | if (!bridge || !pci_is_pcie(bridge) || | |
3509 | bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
3510 | return 0; | |
3511 | ||
3512 | if (bridge->pcie_type == PCI_EXP_TYPE_ROOT_PORT) { | |
3513 | for (i = 0; i < atsru->devices_cnt; i++) | |
3514 | if (atsru->devices[i] == bridge) | |
3515 | return 1; | |
3516 | break; | |
3517 | } | |
3518 | } | |
3519 | ||
3520 | if (atsru->include_all) | |
3521 | return 1; | |
3522 | ||
3523 | return 0; | |
3524 | } | |
3525 | ||
3526 | int dmar_parse_rmrr_atsr_dev(void) | |
3527 | { | |
3528 | struct dmar_rmrr_unit *rmrr, *rmrr_n; | |
3529 | struct dmar_atsr_unit *atsr, *atsr_n; | |
3530 | int ret = 0; | |
3531 | ||
3532 | list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { | |
3533 | ret = rmrr_parse_dev(rmrr); | |
3534 | if (ret) | |
3535 | return ret; | |
3536 | } | |
3537 | ||
3538 | list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { | |
3539 | ret = atsr_parse_dev(atsr); | |
3540 | if (ret) | |
3541 | return ret; | |
3542 | } | |
3543 | ||
3544 | return ret; | |
3545 | } | |
3546 | ||
99dcaded FY |
3547 | /* |
3548 | * Here we only respond to action of unbound device from driver. | |
3549 | * | |
3550 | * Added device is not attached to its DMAR domain here yet. That will happen | |
3551 | * when mapping the device to iova. | |
3552 | */ | |
3553 | static int device_notifier(struct notifier_block *nb, | |
3554 | unsigned long action, void *data) | |
3555 | { | |
3556 | struct device *dev = data; | |
3557 | struct pci_dev *pdev = to_pci_dev(dev); | |
3558 | struct dmar_domain *domain; | |
3559 | ||
44cd613c DW |
3560 | if (iommu_no_mapping(dev)) |
3561 | return 0; | |
3562 | ||
99dcaded FY |
3563 | domain = find_domain(pdev); |
3564 | if (!domain) | |
3565 | return 0; | |
3566 | ||
a97590e5 | 3567 | if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) { |
99dcaded FY |
3568 | domain_remove_one_dev_info(domain, pdev); |
3569 | ||
a97590e5 AW |
3570 | if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && |
3571 | !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && | |
3572 | list_empty(&domain->devices)) | |
3573 | domain_exit(domain); | |
3574 | } | |
3575 | ||
99dcaded FY |
3576 | return 0; |
3577 | } | |
3578 | ||
3579 | static struct notifier_block device_nb = { | |
3580 | .notifier_call = device_notifier, | |
3581 | }; | |
3582 | ||
ba395927 KA |
3583 | int __init intel_iommu_init(void) |
3584 | { | |
3585 | int ret = 0; | |
3586 | ||
a59b50e9 JC |
3587 | /* VT-d is required for a TXT/tboot launch, so enforce that */ |
3588 | force_on = tboot_force_iommu(); | |
3589 | ||
3590 | if (dmar_table_init()) { | |
3591 | if (force_on) | |
3592 | panic("tboot: Failed to initialize DMAR table\n"); | |
ba395927 | 3593 | return -ENODEV; |
a59b50e9 | 3594 | } |
ba395927 | 3595 | |
c2c7286a | 3596 | if (dmar_dev_scope_init() < 0) { |
a59b50e9 JC |
3597 | if (force_on) |
3598 | panic("tboot: Failed to initialize DMAR device scope\n"); | |
1886e8a9 | 3599 | return -ENODEV; |
a59b50e9 | 3600 | } |
1886e8a9 | 3601 | |
75f1cdf1 | 3602 | if (no_iommu || dmar_disabled) |
2ae21010 SS |
3603 | return -ENODEV; |
3604 | ||
51a63e67 JC |
3605 | if (iommu_init_mempool()) { |
3606 | if (force_on) | |
3607 | panic("tboot: Failed to initialize iommu memory\n"); | |
3608 | return -ENODEV; | |
3609 | } | |
3610 | ||
318fe7df SS |
3611 | if (list_empty(&dmar_rmrr_units)) |
3612 | printk(KERN_INFO "DMAR: No RMRR found\n"); | |
3613 | ||
3614 | if (list_empty(&dmar_atsr_units)) | |
3615 | printk(KERN_INFO "DMAR: No ATSR found\n"); | |
3616 | ||
51a63e67 JC |
3617 | if (dmar_init_reserved_ranges()) { |
3618 | if (force_on) | |
3619 | panic("tboot: Failed to reserve iommu ranges\n"); | |
3620 | return -ENODEV; | |
3621 | } | |
ba395927 KA |
3622 | |
3623 | init_no_remapping_devices(); | |
3624 | ||
b779260b | 3625 | ret = init_dmars(); |
ba395927 | 3626 | if (ret) { |
a59b50e9 JC |
3627 | if (force_on) |
3628 | panic("tboot: Failed to initialize DMARs\n"); | |
ba395927 KA |
3629 | printk(KERN_ERR "IOMMU: dmar init failed\n"); |
3630 | put_iova_domain(&reserved_iova_list); | |
3631 | iommu_exit_mempool(); | |
3632 | return ret; | |
3633 | } | |
3634 | printk(KERN_INFO | |
3635 | "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); | |
3636 | ||
5e0d2a6f | 3637 | init_timer(&unmap_timer); |
75f1cdf1 FT |
3638 | #ifdef CONFIG_SWIOTLB |
3639 | swiotlb = 0; | |
3640 | #endif | |
19943b0e | 3641 | dma_ops = &intel_dma_ops; |
4ed0d3e6 | 3642 | |
134fac3f | 3643 | init_iommu_pm_ops(); |
a8bcbb0d | 3644 | |
4236d97d | 3645 | bus_set_iommu(&pci_bus_type, &intel_iommu_ops); |
a8bcbb0d | 3646 | |
99dcaded FY |
3647 | bus_register_notifier(&pci_bus_type, &device_nb); |
3648 | ||
ba395927 KA |
3649 | return 0; |
3650 | } | |
e820482c | 3651 | |
3199aa6b HW |
3652 | static void iommu_detach_dependent_devices(struct intel_iommu *iommu, |
3653 | struct pci_dev *pdev) | |
3654 | { | |
3655 | struct pci_dev *tmp, *parent; | |
3656 | ||
3657 | if (!iommu || !pdev) | |
3658 | return; | |
3659 | ||
3660 | /* dependent device detach */ | |
3661 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
3662 | /* Secondary interface's bus number and devfn 0 */ | |
3663 | if (tmp) { | |
3664 | parent = pdev->bus->self; | |
3665 | while (parent != tmp) { | |
3666 | iommu_detach_dev(iommu, parent->bus->number, | |
276dbf99 | 3667 | parent->devfn); |
3199aa6b HW |
3668 | parent = parent->bus->self; |
3669 | } | |
45e829ea | 3670 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
3199aa6b HW |
3671 | iommu_detach_dev(iommu, |
3672 | tmp->subordinate->number, 0); | |
3673 | else /* this is a legacy PCI bridge */ | |
276dbf99 DW |
3674 | iommu_detach_dev(iommu, tmp->bus->number, |
3675 | tmp->devfn); | |
3199aa6b HW |
3676 | } |
3677 | } | |
3678 | ||
2c2e2c38 | 3679 | static void domain_remove_one_dev_info(struct dmar_domain *domain, |
c7151a8d WH |
3680 | struct pci_dev *pdev) |
3681 | { | |
3682 | struct device_domain_info *info; | |
3683 | struct intel_iommu *iommu; | |
3684 | unsigned long flags; | |
3685 | int found = 0; | |
3686 | struct list_head *entry, *tmp; | |
3687 | ||
276dbf99 DW |
3688 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3689 | pdev->devfn); | |
c7151a8d WH |
3690 | if (!iommu) |
3691 | return; | |
3692 | ||
3693 | spin_lock_irqsave(&device_domain_lock, flags); | |
3694 | list_for_each_safe(entry, tmp, &domain->devices) { | |
3695 | info = list_entry(entry, struct device_domain_info, link); | |
8519dc44 MH |
3696 | if (info->segment == pci_domain_nr(pdev->bus) && |
3697 | info->bus == pdev->bus->number && | |
c7151a8d WH |
3698 | info->devfn == pdev->devfn) { |
3699 | list_del(&info->link); | |
3700 | list_del(&info->global); | |
3701 | if (info->dev) | |
3702 | info->dev->dev.archdata.iommu = NULL; | |
3703 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
3704 | ||
93a23a72 | 3705 | iommu_disable_dev_iotlb(info); |
c7151a8d | 3706 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3707 | iommu_detach_dependent_devices(iommu, pdev); |
c7151a8d WH |
3708 | free_devinfo_mem(info); |
3709 | ||
3710 | spin_lock_irqsave(&device_domain_lock, flags); | |
3711 | ||
3712 | if (found) | |
3713 | break; | |
3714 | else | |
3715 | continue; | |
3716 | } | |
3717 | ||
3718 | /* if there is no other devices under the same iommu | |
3719 | * owned by this domain, clear this iommu in iommu_bmp | |
3720 | * update iommu count and coherency | |
3721 | */ | |
276dbf99 DW |
3722 | if (iommu == device_to_iommu(info->segment, info->bus, |
3723 | info->devfn)) | |
c7151a8d WH |
3724 | found = 1; |
3725 | } | |
3726 | ||
3e7abe25 RD |
3727 | spin_unlock_irqrestore(&device_domain_lock, flags); |
3728 | ||
c7151a8d WH |
3729 | if (found == 0) { |
3730 | unsigned long tmp_flags; | |
3731 | spin_lock_irqsave(&domain->iommu_lock, tmp_flags); | |
3732 | clear_bit(iommu->seq_id, &domain->iommu_bmp); | |
3733 | domain->iommu_count--; | |
58c610bd | 3734 | domain_update_iommu_cap(domain); |
c7151a8d | 3735 | spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); |
a97590e5 | 3736 | |
9b4554b2 AW |
3737 | if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && |
3738 | !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY)) { | |
3739 | spin_lock_irqsave(&iommu->lock, tmp_flags); | |
3740 | clear_bit(domain->id, iommu->domain_ids); | |
3741 | iommu->domains[domain->id] = NULL; | |
3742 | spin_unlock_irqrestore(&iommu->lock, tmp_flags); | |
3743 | } | |
c7151a8d | 3744 | } |
c7151a8d WH |
3745 | } |
3746 | ||
3747 | static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) | |
3748 | { | |
3749 | struct device_domain_info *info; | |
3750 | struct intel_iommu *iommu; | |
3751 | unsigned long flags1, flags2; | |
3752 | ||
3753 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3754 | while (!list_empty(&domain->devices)) { | |
3755 | info = list_entry(domain->devices.next, | |
3756 | struct device_domain_info, link); | |
3757 | list_del(&info->link); | |
3758 | list_del(&info->global); | |
3759 | if (info->dev) | |
3760 | info->dev->dev.archdata.iommu = NULL; | |
3761 | ||
3762 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3763 | ||
93a23a72 | 3764 | iommu_disable_dev_iotlb(info); |
276dbf99 | 3765 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 3766 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3767 | iommu_detach_dependent_devices(iommu, info->dev); |
c7151a8d WH |
3768 | |
3769 | /* clear this iommu in iommu_bmp, update iommu count | |
58c610bd | 3770 | * and capabilities |
c7151a8d WH |
3771 | */ |
3772 | spin_lock_irqsave(&domain->iommu_lock, flags2); | |
3773 | if (test_and_clear_bit(iommu->seq_id, | |
3774 | &domain->iommu_bmp)) { | |
3775 | domain->iommu_count--; | |
58c610bd | 3776 | domain_update_iommu_cap(domain); |
c7151a8d WH |
3777 | } |
3778 | spin_unlock_irqrestore(&domain->iommu_lock, flags2); | |
3779 | ||
3780 | free_devinfo_mem(info); | |
3781 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3782 | } | |
3783 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3784 | } | |
3785 | ||
5e98c4b1 WH |
3786 | /* domain id for virtual machine, it won't be set in context */ |
3787 | static unsigned long vm_domid; | |
3788 | ||
3789 | static struct dmar_domain *iommu_alloc_vm_domain(void) | |
3790 | { | |
3791 | struct dmar_domain *domain; | |
3792 | ||
3793 | domain = alloc_domain_mem(); | |
3794 | if (!domain) | |
3795 | return NULL; | |
3796 | ||
3797 | domain->id = vm_domid++; | |
4c923d47 | 3798 | domain->nid = -1; |
5e98c4b1 WH |
3799 | memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); |
3800 | domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; | |
3801 | ||
3802 | return domain; | |
3803 | } | |
3804 | ||
2c2e2c38 | 3805 | static int md_domain_init(struct dmar_domain *domain, int guest_width) |
5e98c4b1 WH |
3806 | { |
3807 | int adjust_width; | |
3808 | ||
3809 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); | |
5e98c4b1 WH |
3810 | spin_lock_init(&domain->iommu_lock); |
3811 | ||
3812 | domain_reserve_special_ranges(domain); | |
3813 | ||
3814 | /* calculate AGAW */ | |
3815 | domain->gaw = guest_width; | |
3816 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
3817 | domain->agaw = width_to_agaw(adjust_width); | |
3818 | ||
3819 | INIT_LIST_HEAD(&domain->devices); | |
3820 | ||
3821 | domain->iommu_count = 0; | |
3822 | domain->iommu_coherency = 0; | |
c5b15255 | 3823 | domain->iommu_snooping = 0; |
6dd9a7c7 | 3824 | domain->iommu_superpage = 0; |
fe40f1e0 | 3825 | domain->max_addr = 0; |
4c923d47 | 3826 | domain->nid = -1; |
5e98c4b1 WH |
3827 | |
3828 | /* always allocate the top pgd */ | |
4c923d47 | 3829 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
5e98c4b1 WH |
3830 | if (!domain->pgd) |
3831 | return -ENOMEM; | |
3832 | domain_flush_cache(domain, domain->pgd, PAGE_SIZE); | |
3833 | return 0; | |
3834 | } | |
3835 | ||
3836 | static void iommu_free_vm_domain(struct dmar_domain *domain) | |
3837 | { | |
3838 | unsigned long flags; | |
3839 | struct dmar_drhd_unit *drhd; | |
3840 | struct intel_iommu *iommu; | |
3841 | unsigned long i; | |
3842 | unsigned long ndomains; | |
3843 | ||
3844 | for_each_drhd_unit(drhd) { | |
3845 | if (drhd->ignored) | |
3846 | continue; | |
3847 | iommu = drhd->iommu; | |
3848 | ||
3849 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 3850 | for_each_set_bit(i, iommu->domain_ids, ndomains) { |
5e98c4b1 WH |
3851 | if (iommu->domains[i] == domain) { |
3852 | spin_lock_irqsave(&iommu->lock, flags); | |
3853 | clear_bit(i, iommu->domain_ids); | |
3854 | iommu->domains[i] = NULL; | |
3855 | spin_unlock_irqrestore(&iommu->lock, flags); | |
3856 | break; | |
3857 | } | |
5e98c4b1 WH |
3858 | } |
3859 | } | |
3860 | } | |
3861 | ||
3862 | static void vm_domain_exit(struct dmar_domain *domain) | |
3863 | { | |
5e98c4b1 WH |
3864 | /* Domain 0 is reserved, so dont process it */ |
3865 | if (!domain) | |
3866 | return; | |
3867 | ||
3868 | vm_domain_remove_all_dev_info(domain); | |
3869 | /* destroy iovas */ | |
3870 | put_iova_domain(&domain->iovad); | |
5e98c4b1 WH |
3871 | |
3872 | /* clear ptes */ | |
595badf5 | 3873 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3874 | |
3875 | /* free page tables */ | |
d794dc9b | 3876 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3877 | |
3878 | iommu_free_vm_domain(domain); | |
3879 | free_domain_mem(domain); | |
3880 | } | |
3881 | ||
5d450806 | 3882 | static int intel_iommu_domain_init(struct iommu_domain *domain) |
38717946 | 3883 | { |
5d450806 | 3884 | struct dmar_domain *dmar_domain; |
38717946 | 3885 | |
5d450806 JR |
3886 | dmar_domain = iommu_alloc_vm_domain(); |
3887 | if (!dmar_domain) { | |
38717946 | 3888 | printk(KERN_ERR |
5d450806 JR |
3889 | "intel_iommu_domain_init: dmar_domain == NULL\n"); |
3890 | return -ENOMEM; | |
38717946 | 3891 | } |
2c2e2c38 | 3892 | if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
38717946 | 3893 | printk(KERN_ERR |
5d450806 JR |
3894 | "intel_iommu_domain_init() failed\n"); |
3895 | vm_domain_exit(dmar_domain); | |
3896 | return -ENOMEM; | |
38717946 | 3897 | } |
8140a95d | 3898 | domain_update_iommu_cap(dmar_domain); |
5d450806 | 3899 | domain->priv = dmar_domain; |
faa3d6f5 | 3900 | |
5d450806 | 3901 | return 0; |
38717946 | 3902 | } |
38717946 | 3903 | |
5d450806 | 3904 | static void intel_iommu_domain_destroy(struct iommu_domain *domain) |
38717946 | 3905 | { |
5d450806 JR |
3906 | struct dmar_domain *dmar_domain = domain->priv; |
3907 | ||
3908 | domain->priv = NULL; | |
3909 | vm_domain_exit(dmar_domain); | |
38717946 | 3910 | } |
38717946 | 3911 | |
4c5478c9 JR |
3912 | static int intel_iommu_attach_device(struct iommu_domain *domain, |
3913 | struct device *dev) | |
38717946 | 3914 | { |
4c5478c9 JR |
3915 | struct dmar_domain *dmar_domain = domain->priv; |
3916 | struct pci_dev *pdev = to_pci_dev(dev); | |
fe40f1e0 WH |
3917 | struct intel_iommu *iommu; |
3918 | int addr_width; | |
faa3d6f5 WH |
3919 | |
3920 | /* normally pdev is not mapped */ | |
3921 | if (unlikely(domain_context_mapped(pdev))) { | |
3922 | struct dmar_domain *old_domain; | |
3923 | ||
3924 | old_domain = find_domain(pdev); | |
3925 | if (old_domain) { | |
2c2e2c38 FY |
3926 | if (dmar_domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
3927 | dmar_domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) | |
3928 | domain_remove_one_dev_info(old_domain, pdev); | |
faa3d6f5 WH |
3929 | else |
3930 | domain_remove_dev_info(old_domain); | |
3931 | } | |
3932 | } | |
3933 | ||
276dbf99 DW |
3934 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3935 | pdev->devfn); | |
fe40f1e0 WH |
3936 | if (!iommu) |
3937 | return -ENODEV; | |
3938 | ||
3939 | /* check if this iommu agaw is sufficient for max mapped address */ | |
3940 | addr_width = agaw_to_width(iommu->agaw); | |
a99c47a2 TL |
3941 | if (addr_width > cap_mgaw(iommu->cap)) |
3942 | addr_width = cap_mgaw(iommu->cap); | |
3943 | ||
3944 | if (dmar_domain->max_addr > (1LL << addr_width)) { | |
3945 | printk(KERN_ERR "%s: iommu width (%d) is not " | |
fe40f1e0 | 3946 | "sufficient for the mapped address (%llx)\n", |
a99c47a2 | 3947 | __func__, addr_width, dmar_domain->max_addr); |
fe40f1e0 WH |
3948 | return -EFAULT; |
3949 | } | |
a99c47a2 TL |
3950 | dmar_domain->gaw = addr_width; |
3951 | ||
3952 | /* | |
3953 | * Knock out extra levels of page tables if necessary | |
3954 | */ | |
3955 | while (iommu->agaw < dmar_domain->agaw) { | |
3956 | struct dma_pte *pte; | |
3957 | ||
3958 | pte = dmar_domain->pgd; | |
3959 | if (dma_pte_present(pte)) { | |
25cbff16 SY |
3960 | dmar_domain->pgd = (struct dma_pte *) |
3961 | phys_to_virt(dma_pte_addr(pte)); | |
7a661013 | 3962 | free_pgtable_page(pte); |
a99c47a2 TL |
3963 | } |
3964 | dmar_domain->agaw--; | |
3965 | } | |
fe40f1e0 | 3966 | |
5fe60f4e | 3967 | return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
38717946 | 3968 | } |
38717946 | 3969 | |
4c5478c9 JR |
3970 | static void intel_iommu_detach_device(struct iommu_domain *domain, |
3971 | struct device *dev) | |
38717946 | 3972 | { |
4c5478c9 JR |
3973 | struct dmar_domain *dmar_domain = domain->priv; |
3974 | struct pci_dev *pdev = to_pci_dev(dev); | |
3975 | ||
2c2e2c38 | 3976 | domain_remove_one_dev_info(dmar_domain, pdev); |
faa3d6f5 | 3977 | } |
c7151a8d | 3978 | |
b146a1c9 JR |
3979 | static int intel_iommu_map(struct iommu_domain *domain, |
3980 | unsigned long iova, phys_addr_t hpa, | |
3981 | int gfp_order, int iommu_prot) | |
faa3d6f5 | 3982 | { |
dde57a21 | 3983 | struct dmar_domain *dmar_domain = domain->priv; |
fe40f1e0 | 3984 | u64 max_addr; |
dde57a21 | 3985 | int prot = 0; |
b146a1c9 | 3986 | size_t size; |
faa3d6f5 | 3987 | int ret; |
fe40f1e0 | 3988 | |
dde57a21 JR |
3989 | if (iommu_prot & IOMMU_READ) |
3990 | prot |= DMA_PTE_READ; | |
3991 | if (iommu_prot & IOMMU_WRITE) | |
3992 | prot |= DMA_PTE_WRITE; | |
9cf06697 SY |
3993 | if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) |
3994 | prot |= DMA_PTE_SNP; | |
dde57a21 | 3995 | |
b146a1c9 | 3996 | size = PAGE_SIZE << gfp_order; |
163cc52c | 3997 | max_addr = iova + size; |
dde57a21 | 3998 | if (dmar_domain->max_addr < max_addr) { |
fe40f1e0 WH |
3999 | u64 end; |
4000 | ||
4001 | /* check if minimum agaw is sufficient for mapped address */ | |
8954da1f | 4002 | end = __DOMAIN_MAX_ADDR(dmar_domain->gaw) + 1; |
fe40f1e0 | 4003 | if (end < max_addr) { |
8954da1f | 4004 | printk(KERN_ERR "%s: iommu width (%d) is not " |
fe40f1e0 | 4005 | "sufficient for the mapped address (%llx)\n", |
8954da1f | 4006 | __func__, dmar_domain->gaw, max_addr); |
fe40f1e0 WH |
4007 | return -EFAULT; |
4008 | } | |
dde57a21 | 4009 | dmar_domain->max_addr = max_addr; |
fe40f1e0 | 4010 | } |
ad051221 DW |
4011 | /* Round up size to next multiple of PAGE_SIZE, if it and |
4012 | the low bits of hpa would take us onto the next page */ | |
88cb6a74 | 4013 | size = aligned_nrpages(hpa, size); |
ad051221 DW |
4014 | ret = domain_pfn_mapping(dmar_domain, iova >> VTD_PAGE_SHIFT, |
4015 | hpa >> VTD_PAGE_SHIFT, size, prot); | |
faa3d6f5 | 4016 | return ret; |
38717946 | 4017 | } |
38717946 | 4018 | |
b146a1c9 JR |
4019 | static int intel_iommu_unmap(struct iommu_domain *domain, |
4020 | unsigned long iova, int gfp_order) | |
38717946 | 4021 | { |
dde57a21 | 4022 | struct dmar_domain *dmar_domain = domain->priv; |
b146a1c9 | 4023 | size_t size = PAGE_SIZE << gfp_order; |
292827cb | 4024 | int order; |
4b99d352 | 4025 | |
292827cb | 4026 | order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, |
163cc52c | 4027 | (iova + size - 1) >> VTD_PAGE_SHIFT); |
fe40f1e0 | 4028 | |
163cc52c DW |
4029 | if (dmar_domain->max_addr == iova + size) |
4030 | dmar_domain->max_addr = iova; | |
b146a1c9 | 4031 | |
292827cb | 4032 | return order; |
38717946 | 4033 | } |
38717946 | 4034 | |
d14d6577 JR |
4035 | static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, |
4036 | unsigned long iova) | |
38717946 | 4037 | { |
d14d6577 | 4038 | struct dmar_domain *dmar_domain = domain->priv; |
38717946 | 4039 | struct dma_pte *pte; |
faa3d6f5 | 4040 | u64 phys = 0; |
38717946 | 4041 | |
6dd9a7c7 | 4042 | pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, 0); |
38717946 | 4043 | if (pte) |
faa3d6f5 | 4044 | phys = dma_pte_addr(pte); |
38717946 | 4045 | |
faa3d6f5 | 4046 | return phys; |
38717946 | 4047 | } |
a8bcbb0d | 4048 | |
dbb9fd86 SY |
4049 | static int intel_iommu_domain_has_cap(struct iommu_domain *domain, |
4050 | unsigned long cap) | |
4051 | { | |
4052 | struct dmar_domain *dmar_domain = domain->priv; | |
4053 | ||
4054 | if (cap == IOMMU_CAP_CACHE_COHERENCY) | |
4055 | return dmar_domain->iommu_snooping; | |
323f99cb TL |
4056 | if (cap == IOMMU_CAP_INTR_REMAP) |
4057 | return intr_remapping_enabled; | |
dbb9fd86 SY |
4058 | |
4059 | return 0; | |
4060 | } | |
4061 | ||
a8bcbb0d JR |
4062 | static struct iommu_ops intel_iommu_ops = { |
4063 | .domain_init = intel_iommu_domain_init, | |
4064 | .domain_destroy = intel_iommu_domain_destroy, | |
4065 | .attach_dev = intel_iommu_attach_device, | |
4066 | .detach_dev = intel_iommu_detach_device, | |
b146a1c9 JR |
4067 | .map = intel_iommu_map, |
4068 | .unmap = intel_iommu_unmap, | |
a8bcbb0d | 4069 | .iova_to_phys = intel_iommu_iova_to_phys, |
dbb9fd86 | 4070 | .domain_has_cap = intel_iommu_domain_has_cap, |
a8bcbb0d | 4071 | }; |
9af88143 DW |
4072 | |
4073 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) | |
4074 | { | |
4075 | /* | |
4076 | * Mobile 4 Series Chipset neglects to set RWBF capability, | |
4077 | * but needs it: | |
4078 | */ | |
4079 | printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); | |
4080 | rwbf_quirk = 1; | |
2d9e667e DW |
4081 | |
4082 | /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */ | |
4083 | if (dev->revision == 0x07) { | |
4084 | printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n"); | |
4085 | dmar_map_gfx = 0; | |
4086 | } | |
9af88143 DW |
4087 | } |
4088 | ||
4089 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); | |
e0fc7e0b | 4090 | |
eecfd57f AJ |
4091 | #define GGC 0x52 |
4092 | #define GGC_MEMORY_SIZE_MASK (0xf << 8) | |
4093 | #define GGC_MEMORY_SIZE_NONE (0x0 << 8) | |
4094 | #define GGC_MEMORY_SIZE_1M (0x1 << 8) | |
4095 | #define GGC_MEMORY_SIZE_2M (0x3 << 8) | |
4096 | #define GGC_MEMORY_VT_ENABLED (0x8 << 8) | |
4097 | #define GGC_MEMORY_SIZE_2M_VT (0x9 << 8) | |
4098 | #define GGC_MEMORY_SIZE_3M_VT (0xa << 8) | |
4099 | #define GGC_MEMORY_SIZE_4M_VT (0xb << 8) | |
4100 | ||
9eecabcb DW |
4101 | static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev) |
4102 | { | |
4103 | unsigned short ggc; | |
4104 | ||
eecfd57f | 4105 | if (pci_read_config_word(dev, GGC, &ggc)) |
9eecabcb DW |
4106 | return; |
4107 | ||
eecfd57f | 4108 | if (!(ggc & GGC_MEMORY_VT_ENABLED)) { |
9eecabcb DW |
4109 | printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n"); |
4110 | dmar_map_gfx = 0; | |
6fbcfb3e DW |
4111 | } else if (dmar_map_gfx) { |
4112 | /* we have to ensure the gfx device is idle before we flush */ | |
4113 | printk(KERN_INFO "DMAR: Disabling batched IOTLB flush on Ironlake\n"); | |
4114 | intel_iommu_strict = 1; | |
4115 | } | |
9eecabcb DW |
4116 | } |
4117 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt); | |
4118 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt); | |
4119 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0062, quirk_calpella_no_shadow_gtt); | |
4120 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x006a, quirk_calpella_no_shadow_gtt); | |
4121 | ||
e0fc7e0b DW |
4122 | /* On Tylersburg chipsets, some BIOSes have been known to enable the |
4123 | ISOCH DMAR unit for the Azalia sound device, but not give it any | |
4124 | TLB entries, which causes it to deadlock. Check for that. We do | |
4125 | this in a function called from init_dmars(), instead of in a PCI | |
4126 | quirk, because we don't want to print the obnoxious "BIOS broken" | |
4127 | message if VT-d is actually disabled. | |
4128 | */ | |
4129 | static void __init check_tylersburg_isoch(void) | |
4130 | { | |
4131 | struct pci_dev *pdev; | |
4132 | uint32_t vtisochctrl; | |
4133 | ||
4134 | /* If there's no Azalia in the system anyway, forget it. */ | |
4135 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x3a3e, NULL); | |
4136 | if (!pdev) | |
4137 | return; | |
4138 | pci_dev_put(pdev); | |
4139 | ||
4140 | /* System Management Registers. Might be hidden, in which case | |
4141 | we can't do the sanity check. But that's OK, because the | |
4142 | known-broken BIOSes _don't_ actually hide it, so far. */ | |
4143 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x342e, NULL); | |
4144 | if (!pdev) | |
4145 | return; | |
4146 | ||
4147 | if (pci_read_config_dword(pdev, 0x188, &vtisochctrl)) { | |
4148 | pci_dev_put(pdev); | |
4149 | return; | |
4150 | } | |
4151 | ||
4152 | pci_dev_put(pdev); | |
4153 | ||
4154 | /* If Azalia DMA is routed to the non-isoch DMAR unit, fine. */ | |
4155 | if (vtisochctrl & 1) | |
4156 | return; | |
4157 | ||
4158 | /* Drop all bits other than the number of TLB entries */ | |
4159 | vtisochctrl &= 0x1c; | |
4160 | ||
4161 | /* If we have the recommended number of TLB entries (16), fine. */ | |
4162 | if (vtisochctrl == 0x10) | |
4163 | return; | |
4164 | ||
4165 | /* Zero TLB entries? You get to ride the short bus to school. */ | |
4166 | if (!vtisochctrl) { | |
4167 | WARN(1, "Your BIOS is broken; DMA routed to ISOCH DMAR unit but no TLB space.\n" | |
4168 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
4169 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
4170 | dmi_get_system_info(DMI_BIOS_VERSION), | |
4171 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
4172 | iommu_identity_mapping |= IDENTMAP_AZALIA; | |
4173 | return; | |
4174 | } | |
4175 | ||
4176 | printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", | |
4177 | vtisochctrl); | |
4178 | } |