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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> |
54485c30 | 27 | #include <linux/export.h> |
ba395927 KA |
28 | #include <linux/slab.h> |
29 | #include <linux/irq.h> | |
30 | #include <linux/interrupt.h> | |
ba395927 KA |
31 | #include <linux/spinlock.h> |
32 | #include <linux/pci.h> | |
33 | #include <linux/dmar.h> | |
34 | #include <linux/dma-mapping.h> | |
35 | #include <linux/mempool.h> | |
5e0d2a6f | 36 | #include <linux/timer.h> |
38717946 | 37 | #include <linux/iova.h> |
5d450806 | 38 | #include <linux/iommu.h> |
38717946 | 39 | #include <linux/intel-iommu.h> |
134fac3f | 40 | #include <linux/syscore_ops.h> |
69575d38 | 41 | #include <linux/tboot.h> |
adb2fe02 | 42 | #include <linux/dmi.h> |
5cdede24 | 43 | #include <linux/pci-ats.h> |
0ee332c1 | 44 | #include <linux/memblock.h> |
8a8f422d | 45 | #include <asm/irq_remapping.h> |
ba395927 | 46 | #include <asm/cacheflush.h> |
46a7fa27 | 47 | #include <asm/iommu.h> |
ba395927 | 48 | |
5b6985ce FY |
49 | #define ROOT_SIZE VTD_PAGE_SIZE |
50 | #define CONTEXT_SIZE VTD_PAGE_SIZE | |
51 | ||
ba395927 KA |
52 | #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) |
53 | #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) | |
e0fc7e0b | 54 | #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) |
ba395927 KA |
55 | |
56 | #define IOAPIC_RANGE_START (0xfee00000) | |
57 | #define IOAPIC_RANGE_END (0xfeefffff) | |
58 | #define IOVA_START_ADDR (0x1000) | |
59 | ||
60 | #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 | |
61 | ||
4ed0d3e6 FY |
62 | #define MAX_AGAW_WIDTH 64 |
63 | ||
2ebe3151 DW |
64 | #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) |
65 | #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) | |
66 | ||
67 | /* We limit DOMAIN_MAX_PFN to fit in an unsigned long, and DOMAIN_MAX_ADDR | |
68 | to match. That way, we can use 'unsigned long' for PFNs with impunity. */ | |
69 | #define DOMAIN_MAX_PFN(gaw) ((unsigned long) min_t(uint64_t, \ | |
70 | __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) | |
71 | #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) | |
ba395927 | 72 | |
f27be03b | 73 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
284901a9 | 74 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
6a35528a | 75 | #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) |
5e0d2a6f | 76 | |
df08cdc7 AM |
77 | /* page table handling */ |
78 | #define LEVEL_STRIDE (9) | |
79 | #define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) | |
80 | ||
6d1c56a9 OBC |
81 | /* |
82 | * This bitmap is used to advertise the page sizes our hardware support | |
83 | * to the IOMMU core, which will then use this information to split | |
84 | * physically contiguous memory regions it is mapping into page sizes | |
85 | * that we support. | |
86 | * | |
87 | * Traditionally the IOMMU core just handed us the mappings directly, | |
88 | * after making sure the size is an order of a 4KiB page and that the | |
89 | * mapping has natural alignment. | |
90 | * | |
91 | * To retain this behavior, we currently advertise that we support | |
92 | * all page sizes that are an order of 4KiB. | |
93 | * | |
94 | * If at some point we'd like to utilize the IOMMU core's new behavior, | |
95 | * we could change this to advertise the real page sizes we support. | |
96 | */ | |
97 | #define INTEL_IOMMU_PGSIZES (~0xFFFUL) | |
98 | ||
df08cdc7 AM |
99 | static inline int agaw_to_level(int agaw) |
100 | { | |
101 | return agaw + 2; | |
102 | } | |
103 | ||
104 | static inline int agaw_to_width(int agaw) | |
105 | { | |
106 | return 30 + agaw * LEVEL_STRIDE; | |
107 | } | |
108 | ||
109 | static inline int width_to_agaw(int width) | |
110 | { | |
111 | return (width - 30) / LEVEL_STRIDE; | |
112 | } | |
113 | ||
114 | static inline unsigned int level_to_offset_bits(int level) | |
115 | { | |
116 | return (level - 1) * LEVEL_STRIDE; | |
117 | } | |
118 | ||
119 | static inline int pfn_level_offset(unsigned long pfn, int level) | |
120 | { | |
121 | return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; | |
122 | } | |
123 | ||
124 | static inline unsigned long level_mask(int level) | |
125 | { | |
126 | return -1UL << level_to_offset_bits(level); | |
127 | } | |
128 | ||
129 | static inline unsigned long level_size(int level) | |
130 | { | |
131 | return 1UL << level_to_offset_bits(level); | |
132 | } | |
133 | ||
134 | static inline unsigned long align_to_level(unsigned long pfn, int level) | |
135 | { | |
136 | return (pfn + level_size(level) - 1) & level_mask(level); | |
137 | } | |
fd18de50 | 138 | |
6dd9a7c7 YS |
139 | static inline unsigned long lvl_to_nr_pages(unsigned int lvl) |
140 | { | |
141 | return 1 << ((lvl - 1) * LEVEL_STRIDE); | |
142 | } | |
143 | ||
dd4e8319 DW |
144 | /* VT-d pages must always be _smaller_ than MM pages. Otherwise things |
145 | are never going to work. */ | |
146 | static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) | |
147 | { | |
148 | return dma_pfn >> (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
149 | } | |
150 | ||
151 | static inline unsigned long mm_to_dma_pfn(unsigned long mm_pfn) | |
152 | { | |
153 | return mm_pfn << (PAGE_SHIFT - VTD_PAGE_SHIFT); | |
154 | } | |
155 | static inline unsigned long page_to_dma_pfn(struct page *pg) | |
156 | { | |
157 | return mm_to_dma_pfn(page_to_pfn(pg)); | |
158 | } | |
159 | static inline unsigned long virt_to_dma_pfn(void *p) | |
160 | { | |
161 | return page_to_dma_pfn(virt_to_page(p)); | |
162 | } | |
163 | ||
d9630fe9 WH |
164 | /* global iommu list, set NULL for ignored DMAR units */ |
165 | static struct intel_iommu **g_iommus; | |
166 | ||
e0fc7e0b | 167 | static void __init check_tylersburg_isoch(void); |
9af88143 DW |
168 | static int rwbf_quirk; |
169 | ||
b779260b JC |
170 | /* |
171 | * set to 1 to panic kernel if can't successfully enable VT-d | |
172 | * (used when kernel is launched w/ TXT) | |
173 | */ | |
174 | static int force_on = 0; | |
175 | ||
46b08e1a MM |
176 | /* |
177 | * 0: Present | |
178 | * 1-11: Reserved | |
179 | * 12-63: Context Ptr (12 - (haw-1)) | |
180 | * 64-127: Reserved | |
181 | */ | |
182 | struct root_entry { | |
183 | u64 val; | |
184 | u64 rsvd1; | |
185 | }; | |
186 | #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) | |
187 | static inline bool root_present(struct root_entry *root) | |
188 | { | |
189 | return (root->val & 1); | |
190 | } | |
191 | static inline void set_root_present(struct root_entry *root) | |
192 | { | |
193 | root->val |= 1; | |
194 | } | |
195 | static inline void set_root_value(struct root_entry *root, unsigned long value) | |
196 | { | |
197 | root->val |= value & VTD_PAGE_MASK; | |
198 | } | |
199 | ||
200 | static inline struct context_entry * | |
201 | get_context_addr_from_root(struct root_entry *root) | |
202 | { | |
203 | return (struct context_entry *) | |
204 | (root_present(root)?phys_to_virt( | |
205 | root->val & VTD_PAGE_MASK) : | |
206 | NULL); | |
207 | } | |
208 | ||
7a8fc25e MM |
209 | /* |
210 | * low 64 bits: | |
211 | * 0: present | |
212 | * 1: fault processing disable | |
213 | * 2-3: translation type | |
214 | * 12-63: address space root | |
215 | * high 64 bits: | |
216 | * 0-2: address width | |
217 | * 3-6: aval | |
218 | * 8-23: domain id | |
219 | */ | |
220 | struct context_entry { | |
221 | u64 lo; | |
222 | u64 hi; | |
223 | }; | |
c07e7d21 MM |
224 | |
225 | static inline bool context_present(struct context_entry *context) | |
226 | { | |
227 | return (context->lo & 1); | |
228 | } | |
229 | static inline void context_set_present(struct context_entry *context) | |
230 | { | |
231 | context->lo |= 1; | |
232 | } | |
233 | ||
234 | static inline void context_set_fault_enable(struct context_entry *context) | |
235 | { | |
236 | context->lo &= (((u64)-1) << 2) | 1; | |
237 | } | |
238 | ||
c07e7d21 MM |
239 | static inline void context_set_translation_type(struct context_entry *context, |
240 | unsigned long value) | |
241 | { | |
242 | context->lo &= (((u64)-1) << 4) | 3; | |
243 | context->lo |= (value & 3) << 2; | |
244 | } | |
245 | ||
246 | static inline void context_set_address_root(struct context_entry *context, | |
247 | unsigned long value) | |
248 | { | |
249 | context->lo |= value & VTD_PAGE_MASK; | |
250 | } | |
251 | ||
252 | static inline void context_set_address_width(struct context_entry *context, | |
253 | unsigned long value) | |
254 | { | |
255 | context->hi |= value & 7; | |
256 | } | |
257 | ||
258 | static inline void context_set_domain_id(struct context_entry *context, | |
259 | unsigned long value) | |
260 | { | |
261 | context->hi |= (value & ((1 << 16) - 1)) << 8; | |
262 | } | |
263 | ||
264 | static inline void context_clear_entry(struct context_entry *context) | |
265 | { | |
266 | context->lo = 0; | |
267 | context->hi = 0; | |
268 | } | |
7a8fc25e | 269 | |
622ba12a MM |
270 | /* |
271 | * 0: readable | |
272 | * 1: writable | |
273 | * 2-6: reserved | |
274 | * 7: super page | |
9cf06697 SY |
275 | * 8-10: available |
276 | * 11: snoop behavior | |
622ba12a MM |
277 | * 12-63: Host physcial address |
278 | */ | |
279 | struct dma_pte { | |
280 | u64 val; | |
281 | }; | |
622ba12a | 282 | |
19c239ce MM |
283 | static inline void dma_clear_pte(struct dma_pte *pte) |
284 | { | |
285 | pte->val = 0; | |
286 | } | |
287 | ||
288 | static inline void dma_set_pte_readable(struct dma_pte *pte) | |
289 | { | |
290 | pte->val |= DMA_PTE_READ; | |
291 | } | |
292 | ||
293 | static inline void dma_set_pte_writable(struct dma_pte *pte) | |
294 | { | |
295 | pte->val |= DMA_PTE_WRITE; | |
296 | } | |
297 | ||
9cf06697 SY |
298 | static inline void dma_set_pte_snp(struct dma_pte *pte) |
299 | { | |
300 | pte->val |= DMA_PTE_SNP; | |
301 | } | |
302 | ||
19c239ce MM |
303 | static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) |
304 | { | |
305 | pte->val = (pte->val & ~3) | (prot & 3); | |
306 | } | |
307 | ||
308 | static inline u64 dma_pte_addr(struct dma_pte *pte) | |
309 | { | |
c85994e4 DW |
310 | #ifdef CONFIG_64BIT |
311 | return pte->val & VTD_PAGE_MASK; | |
312 | #else | |
313 | /* Must have a full atomic 64-bit read */ | |
1a8bd481 | 314 | return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK; |
c85994e4 | 315 | #endif |
19c239ce MM |
316 | } |
317 | ||
dd4e8319 | 318 | static inline void dma_set_pte_pfn(struct dma_pte *pte, unsigned long pfn) |
19c239ce | 319 | { |
dd4e8319 | 320 | pte->val |= (uint64_t)pfn << VTD_PAGE_SHIFT; |
19c239ce MM |
321 | } |
322 | ||
323 | static inline bool dma_pte_present(struct dma_pte *pte) | |
324 | { | |
325 | return (pte->val & 3) != 0; | |
326 | } | |
622ba12a | 327 | |
4399c8bf AK |
328 | static inline bool dma_pte_superpage(struct dma_pte *pte) |
329 | { | |
330 | return (pte->val & (1 << 7)); | |
331 | } | |
332 | ||
75e6bf96 DW |
333 | static inline int first_pte_in_page(struct dma_pte *pte) |
334 | { | |
335 | return !((unsigned long)pte & ~VTD_PAGE_MASK); | |
336 | } | |
337 | ||
2c2e2c38 FY |
338 | /* |
339 | * This domain is a statically identity mapping domain. | |
340 | * 1. This domain creats a static 1:1 mapping to all usable memory. | |
341 | * 2. It maps to each iommu if successful. | |
342 | * 3. Each iommu mapps to this domain if successful. | |
343 | */ | |
19943b0e DW |
344 | static struct dmar_domain *si_domain; |
345 | static int hw_pass_through = 1; | |
2c2e2c38 | 346 | |
3b5410e7 | 347 | /* devices under the same p2p bridge are owned in one domain */ |
cdc7b837 | 348 | #define DOMAIN_FLAG_P2P_MULTIPLE_DEVICES (1 << 0) |
3b5410e7 | 349 | |
1ce28feb WH |
350 | /* domain represents a virtual machine, more than one devices |
351 | * across iommus may be owned in one domain, e.g. kvm guest. | |
352 | */ | |
353 | #define DOMAIN_FLAG_VIRTUAL_MACHINE (1 << 1) | |
354 | ||
2c2e2c38 FY |
355 | /* si_domain contains mulitple devices */ |
356 | #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2) | |
357 | ||
1b198bb0 MT |
358 | /* define the limit of IOMMUs supported in each domain */ |
359 | #ifdef CONFIG_X86 | |
360 | # define IOMMU_UNITS_SUPPORTED MAX_IO_APICS | |
361 | #else | |
362 | # define IOMMU_UNITS_SUPPORTED 64 | |
363 | #endif | |
364 | ||
99126f7c MM |
365 | struct dmar_domain { |
366 | int id; /* domain id */ | |
4c923d47 | 367 | int nid; /* node id */ |
1b198bb0 MT |
368 | DECLARE_BITMAP(iommu_bmp, IOMMU_UNITS_SUPPORTED); |
369 | /* bitmap of iommus this domain uses*/ | |
99126f7c MM |
370 | |
371 | struct list_head devices; /* all devices' list */ | |
372 | struct iova_domain iovad; /* iova's that belong to this domain */ | |
373 | ||
374 | struct dma_pte *pgd; /* virtual address */ | |
99126f7c MM |
375 | int gaw; /* max guest address width */ |
376 | ||
377 | /* adjusted guest address width, 0 is level 2 30-bit */ | |
378 | int agaw; | |
379 | ||
3b5410e7 | 380 | int flags; /* flags to find out type of domain */ |
8e604097 WH |
381 | |
382 | int iommu_coherency;/* indicate coherency of iommu access */ | |
58c610bd | 383 | int iommu_snooping; /* indicate snooping control feature*/ |
c7151a8d | 384 | int iommu_count; /* reference count of iommu */ |
6dd9a7c7 YS |
385 | int iommu_superpage;/* Level of superpages supported: |
386 | 0 == 4KiB (no superpages), 1 == 2MiB, | |
387 | 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */ | |
c7151a8d | 388 | spinlock_t iommu_lock; /* protect iommu set in domain */ |
fe40f1e0 | 389 | u64 max_addr; /* maximum mapped address */ |
99126f7c MM |
390 | }; |
391 | ||
a647dacb MM |
392 | /* PCI domain-device relationship */ |
393 | struct device_domain_info { | |
394 | struct list_head link; /* link to domain siblings */ | |
395 | struct list_head global; /* link to global list */ | |
276dbf99 DW |
396 | int segment; /* PCI domain */ |
397 | u8 bus; /* PCI bus number */ | |
a647dacb | 398 | u8 devfn; /* PCI devfn number */ |
45e829ea | 399 | struct pci_dev *dev; /* it's NULL for PCIe-to-PCI bridge */ |
93a23a72 | 400 | struct intel_iommu *iommu; /* IOMMU used by this device */ |
a647dacb MM |
401 | struct dmar_domain *domain; /* pointer to domain */ |
402 | }; | |
403 | ||
5e0d2a6f | 404 | static void flush_unmaps_timeout(unsigned long data); |
405 | ||
406 | DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); | |
407 | ||
80b20dd8 | 408 | #define HIGH_WATER_MARK 250 |
409 | struct deferred_flush_tables { | |
410 | int next; | |
411 | struct iova *iova[HIGH_WATER_MARK]; | |
412 | struct dmar_domain *domain[HIGH_WATER_MARK]; | |
413 | }; | |
414 | ||
415 | static struct deferred_flush_tables *deferred_flush; | |
416 | ||
5e0d2a6f | 417 | /* bitmap for indexing intel_iommus */ |
5e0d2a6f | 418 | static int g_num_of_iommus; |
419 | ||
420 | static DEFINE_SPINLOCK(async_umap_flush_lock); | |
421 | static LIST_HEAD(unmaps_to_do); | |
422 | ||
423 | static int timer_on; | |
424 | static long list_size; | |
5e0d2a6f | 425 | |
ba395927 KA |
426 | static void domain_remove_dev_info(struct dmar_domain *domain); |
427 | ||
d3f13810 | 428 | #ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON |
0cd5c3c8 KM |
429 | int dmar_disabled = 0; |
430 | #else | |
431 | int dmar_disabled = 1; | |
d3f13810 | 432 | #endif /*CONFIG_INTEL_IOMMU_DEFAULT_ON*/ |
0cd5c3c8 | 433 | |
8bc1f85c ED |
434 | int intel_iommu_enabled = 0; |
435 | EXPORT_SYMBOL_GPL(intel_iommu_enabled); | |
436 | ||
2d9e667e | 437 | static int dmar_map_gfx = 1; |
7d3b03ce | 438 | static int dmar_forcedac; |
5e0d2a6f | 439 | static int intel_iommu_strict; |
6dd9a7c7 | 440 | static int intel_iommu_superpage = 1; |
ba395927 | 441 | |
c0771df8 DW |
442 | int intel_iommu_gfx_mapped; |
443 | EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); | |
444 | ||
ba395927 KA |
445 | #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1)) |
446 | static DEFINE_SPINLOCK(device_domain_lock); | |
447 | static LIST_HEAD(device_domain_list); | |
448 | ||
a8bcbb0d JR |
449 | static struct iommu_ops intel_iommu_ops; |
450 | ||
ba395927 KA |
451 | static int __init intel_iommu_setup(char *str) |
452 | { | |
453 | if (!str) | |
454 | return -EINVAL; | |
455 | while (*str) { | |
0cd5c3c8 KM |
456 | if (!strncmp(str, "on", 2)) { |
457 | dmar_disabled = 0; | |
458 | printk(KERN_INFO "Intel-IOMMU: enabled\n"); | |
459 | } else if (!strncmp(str, "off", 3)) { | |
ba395927 | 460 | dmar_disabled = 1; |
0cd5c3c8 | 461 | printk(KERN_INFO "Intel-IOMMU: disabled\n"); |
ba395927 KA |
462 | } else if (!strncmp(str, "igfx_off", 8)) { |
463 | dmar_map_gfx = 0; | |
464 | printk(KERN_INFO | |
465 | "Intel-IOMMU: disable GFX device mapping\n"); | |
7d3b03ce | 466 | } else if (!strncmp(str, "forcedac", 8)) { |
5e0d2a6f | 467 | printk(KERN_INFO |
7d3b03ce KA |
468 | "Intel-IOMMU: Forcing DAC for PCI devices\n"); |
469 | dmar_forcedac = 1; | |
5e0d2a6f | 470 | } else if (!strncmp(str, "strict", 6)) { |
471 | printk(KERN_INFO | |
472 | "Intel-IOMMU: disable batched IOTLB flush\n"); | |
473 | intel_iommu_strict = 1; | |
6dd9a7c7 YS |
474 | } else if (!strncmp(str, "sp_off", 6)) { |
475 | printk(KERN_INFO | |
476 | "Intel-IOMMU: disable supported super page\n"); | |
477 | intel_iommu_superpage = 0; | |
ba395927 KA |
478 | } |
479 | ||
480 | str += strcspn(str, ","); | |
481 | while (*str == ',') | |
482 | str++; | |
483 | } | |
484 | return 0; | |
485 | } | |
486 | __setup("intel_iommu=", intel_iommu_setup); | |
487 | ||
488 | static struct kmem_cache *iommu_domain_cache; | |
489 | static struct kmem_cache *iommu_devinfo_cache; | |
490 | static struct kmem_cache *iommu_iova_cache; | |
491 | ||
4c923d47 | 492 | static inline void *alloc_pgtable_page(int node) |
eb3fa7cb | 493 | { |
4c923d47 SS |
494 | struct page *page; |
495 | void *vaddr = NULL; | |
eb3fa7cb | 496 | |
4c923d47 SS |
497 | page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0); |
498 | if (page) | |
499 | vaddr = page_address(page); | |
eb3fa7cb | 500 | return vaddr; |
ba395927 KA |
501 | } |
502 | ||
503 | static inline void free_pgtable_page(void *vaddr) | |
504 | { | |
505 | free_page((unsigned long)vaddr); | |
506 | } | |
507 | ||
508 | static inline void *alloc_domain_mem(void) | |
509 | { | |
354bb65e | 510 | return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC); |
ba395927 KA |
511 | } |
512 | ||
38717946 | 513 | static void free_domain_mem(void *vaddr) |
ba395927 KA |
514 | { |
515 | kmem_cache_free(iommu_domain_cache, vaddr); | |
516 | } | |
517 | ||
518 | static inline void * alloc_devinfo_mem(void) | |
519 | { | |
354bb65e | 520 | return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC); |
ba395927 KA |
521 | } |
522 | ||
523 | static inline void free_devinfo_mem(void *vaddr) | |
524 | { | |
525 | kmem_cache_free(iommu_devinfo_cache, vaddr); | |
526 | } | |
527 | ||
528 | struct iova *alloc_iova_mem(void) | |
529 | { | |
354bb65e | 530 | return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC); |
ba395927 KA |
531 | } |
532 | ||
533 | void free_iova_mem(struct iova *iova) | |
534 | { | |
535 | kmem_cache_free(iommu_iova_cache, iova); | |
536 | } | |
537 | ||
1b573683 | 538 | |
4ed0d3e6 | 539 | static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) |
1b573683 WH |
540 | { |
541 | unsigned long sagaw; | |
542 | int agaw = -1; | |
543 | ||
544 | sagaw = cap_sagaw(iommu->cap); | |
4ed0d3e6 | 545 | for (agaw = width_to_agaw(max_gaw); |
1b573683 WH |
546 | agaw >= 0; agaw--) { |
547 | if (test_bit(agaw, &sagaw)) | |
548 | break; | |
549 | } | |
550 | ||
551 | return agaw; | |
552 | } | |
553 | ||
4ed0d3e6 FY |
554 | /* |
555 | * Calculate max SAGAW for each iommu. | |
556 | */ | |
557 | int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
558 | { | |
559 | return __iommu_calculate_agaw(iommu, MAX_AGAW_WIDTH); | |
560 | } | |
561 | ||
562 | /* | |
563 | * calculate agaw for each iommu. | |
564 | * "SAGAW" may be different across iommus, use a default agaw, and | |
565 | * get a supported less agaw for iommus that don't support the default agaw. | |
566 | */ | |
567 | int iommu_calculate_agaw(struct intel_iommu *iommu) | |
568 | { | |
569 | return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
570 | } | |
571 | ||
2c2e2c38 | 572 | /* This functionin only returns single iommu in a domain */ |
8c11e798 WH |
573 | static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) |
574 | { | |
575 | int iommu_id; | |
576 | ||
2c2e2c38 | 577 | /* si_domain and vm domain should not get here. */ |
1ce28feb | 578 | BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE); |
2c2e2c38 | 579 | BUG_ON(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY); |
1ce28feb | 580 | |
1b198bb0 | 581 | iommu_id = find_first_bit(domain->iommu_bmp, g_num_of_iommus); |
8c11e798 WH |
582 | if (iommu_id < 0 || iommu_id >= g_num_of_iommus) |
583 | return NULL; | |
584 | ||
585 | return g_iommus[iommu_id]; | |
586 | } | |
587 | ||
8e604097 WH |
588 | static void domain_update_iommu_coherency(struct dmar_domain *domain) |
589 | { | |
590 | int i; | |
591 | ||
592 | domain->iommu_coherency = 1; | |
593 | ||
1b198bb0 | 594 | for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) { |
8e604097 WH |
595 | if (!ecap_coherent(g_iommus[i]->ecap)) { |
596 | domain->iommu_coherency = 0; | |
597 | break; | |
598 | } | |
8e604097 WH |
599 | } |
600 | } | |
601 | ||
58c610bd SY |
602 | static void domain_update_iommu_snooping(struct dmar_domain *domain) |
603 | { | |
604 | int i; | |
605 | ||
606 | domain->iommu_snooping = 1; | |
607 | ||
1b198bb0 | 608 | for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) { |
58c610bd SY |
609 | if (!ecap_sc_support(g_iommus[i]->ecap)) { |
610 | domain->iommu_snooping = 0; | |
611 | break; | |
612 | } | |
58c610bd SY |
613 | } |
614 | } | |
615 | ||
6dd9a7c7 YS |
616 | static void domain_update_iommu_superpage(struct dmar_domain *domain) |
617 | { | |
8140a95d AK |
618 | struct dmar_drhd_unit *drhd; |
619 | struct intel_iommu *iommu = NULL; | |
620 | int mask = 0xf; | |
6dd9a7c7 YS |
621 | |
622 | if (!intel_iommu_superpage) { | |
623 | domain->iommu_superpage = 0; | |
624 | return; | |
625 | } | |
626 | ||
8140a95d AK |
627 | /* set iommu_superpage to the smallest common denominator */ |
628 | for_each_active_iommu(iommu, drhd) { | |
629 | mask &= cap_super_page_val(iommu->cap); | |
6dd9a7c7 YS |
630 | if (!mask) { |
631 | break; | |
632 | } | |
633 | } | |
634 | domain->iommu_superpage = fls(mask); | |
635 | } | |
636 | ||
58c610bd SY |
637 | /* Some capabilities may be different across iommus */ |
638 | static void domain_update_iommu_cap(struct dmar_domain *domain) | |
639 | { | |
640 | domain_update_iommu_coherency(domain); | |
641 | domain_update_iommu_snooping(domain); | |
6dd9a7c7 | 642 | domain_update_iommu_superpage(domain); |
58c610bd SY |
643 | } |
644 | ||
276dbf99 | 645 | static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) |
c7151a8d WH |
646 | { |
647 | struct dmar_drhd_unit *drhd = NULL; | |
648 | int i; | |
649 | ||
650 | for_each_drhd_unit(drhd) { | |
651 | if (drhd->ignored) | |
652 | continue; | |
276dbf99 DW |
653 | if (segment != drhd->segment) |
654 | continue; | |
c7151a8d | 655 | |
924b6231 | 656 | for (i = 0; i < drhd->devices_cnt; i++) { |
288e4877 DH |
657 | if (drhd->devices[i] && |
658 | drhd->devices[i]->bus->number == bus && | |
c7151a8d WH |
659 | drhd->devices[i]->devfn == devfn) |
660 | return drhd->iommu; | |
4958c5dc DW |
661 | if (drhd->devices[i] && |
662 | drhd->devices[i]->subordinate && | |
924b6231 | 663 | drhd->devices[i]->subordinate->number <= bus && |
b918c62e | 664 | drhd->devices[i]->subordinate->busn_res.end >= bus) |
924b6231 DW |
665 | return drhd->iommu; |
666 | } | |
c7151a8d WH |
667 | |
668 | if (drhd->include_all) | |
669 | return drhd->iommu; | |
670 | } | |
671 | ||
672 | return NULL; | |
673 | } | |
674 | ||
5331fe6f WH |
675 | static void domain_flush_cache(struct dmar_domain *domain, |
676 | void *addr, int size) | |
677 | { | |
678 | if (!domain->iommu_coherency) | |
679 | clflush_cache_range(addr, size); | |
680 | } | |
681 | ||
ba395927 KA |
682 | /* Gets context entry for a given bus and devfn */ |
683 | static struct context_entry * device_to_context_entry(struct intel_iommu *iommu, | |
684 | u8 bus, u8 devfn) | |
685 | { | |
686 | struct root_entry *root; | |
687 | struct context_entry *context; | |
688 | unsigned long phy_addr; | |
689 | unsigned long flags; | |
690 | ||
691 | spin_lock_irqsave(&iommu->lock, flags); | |
692 | root = &iommu->root_entry[bus]; | |
693 | context = get_context_addr_from_root(root); | |
694 | if (!context) { | |
4c923d47 SS |
695 | context = (struct context_entry *) |
696 | alloc_pgtable_page(iommu->node); | |
ba395927 KA |
697 | if (!context) { |
698 | spin_unlock_irqrestore(&iommu->lock, flags); | |
699 | return NULL; | |
700 | } | |
5b6985ce | 701 | __iommu_flush_cache(iommu, (void *)context, CONTEXT_SIZE); |
ba395927 KA |
702 | phy_addr = virt_to_phys((void *)context); |
703 | set_root_value(root, phy_addr); | |
704 | set_root_present(root); | |
705 | __iommu_flush_cache(iommu, root, sizeof(*root)); | |
706 | } | |
707 | spin_unlock_irqrestore(&iommu->lock, flags); | |
708 | return &context[devfn]; | |
709 | } | |
710 | ||
711 | static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
712 | { | |
713 | struct root_entry *root; | |
714 | struct context_entry *context; | |
715 | int ret; | |
716 | unsigned long flags; | |
717 | ||
718 | spin_lock_irqsave(&iommu->lock, flags); | |
719 | root = &iommu->root_entry[bus]; | |
720 | context = get_context_addr_from_root(root); | |
721 | if (!context) { | |
722 | ret = 0; | |
723 | goto out; | |
724 | } | |
c07e7d21 | 725 | ret = context_present(&context[devfn]); |
ba395927 KA |
726 | out: |
727 | spin_unlock_irqrestore(&iommu->lock, flags); | |
728 | return ret; | |
729 | } | |
730 | ||
731 | static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn) | |
732 | { | |
733 | struct root_entry *root; | |
734 | struct context_entry *context; | |
735 | unsigned long flags; | |
736 | ||
737 | spin_lock_irqsave(&iommu->lock, flags); | |
738 | root = &iommu->root_entry[bus]; | |
739 | context = get_context_addr_from_root(root); | |
740 | if (context) { | |
c07e7d21 | 741 | context_clear_entry(&context[devfn]); |
ba395927 KA |
742 | __iommu_flush_cache(iommu, &context[devfn], \ |
743 | sizeof(*context)); | |
744 | } | |
745 | spin_unlock_irqrestore(&iommu->lock, flags); | |
746 | } | |
747 | ||
748 | static void free_context_table(struct intel_iommu *iommu) | |
749 | { | |
750 | struct root_entry *root; | |
751 | int i; | |
752 | unsigned long flags; | |
753 | struct context_entry *context; | |
754 | ||
755 | spin_lock_irqsave(&iommu->lock, flags); | |
756 | if (!iommu->root_entry) { | |
757 | goto out; | |
758 | } | |
759 | for (i = 0; i < ROOT_ENTRY_NR; i++) { | |
760 | root = &iommu->root_entry[i]; | |
761 | context = get_context_addr_from_root(root); | |
762 | if (context) | |
763 | free_pgtable_page(context); | |
764 | } | |
765 | free_pgtable_page(iommu->root_entry); | |
766 | iommu->root_entry = NULL; | |
767 | out: | |
768 | spin_unlock_irqrestore(&iommu->lock, flags); | |
769 | } | |
770 | ||
b026fd28 | 771 | static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, |
4399c8bf | 772 | unsigned long pfn, int target_level) |
ba395927 | 773 | { |
b026fd28 | 774 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
ba395927 KA |
775 | struct dma_pte *parent, *pte = NULL; |
776 | int level = agaw_to_level(domain->agaw); | |
4399c8bf | 777 | int offset; |
ba395927 KA |
778 | |
779 | BUG_ON(!domain->pgd); | |
b026fd28 | 780 | BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width); |
ba395927 KA |
781 | parent = domain->pgd; |
782 | ||
ba395927 KA |
783 | while (level > 0) { |
784 | void *tmp_page; | |
785 | ||
b026fd28 | 786 | offset = pfn_level_offset(pfn, level); |
ba395927 | 787 | pte = &parent[offset]; |
4399c8bf | 788 | if (!target_level && (dma_pte_superpage(pte) || !dma_pte_present(pte))) |
6dd9a7c7 YS |
789 | break; |
790 | if (level == target_level) | |
ba395927 KA |
791 | break; |
792 | ||
19c239ce | 793 | if (!dma_pte_present(pte)) { |
c85994e4 DW |
794 | uint64_t pteval; |
795 | ||
4c923d47 | 796 | tmp_page = alloc_pgtable_page(domain->nid); |
ba395927 | 797 | |
206a73c1 | 798 | if (!tmp_page) |
ba395927 | 799 | return NULL; |
206a73c1 | 800 | |
c85994e4 | 801 | domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE); |
64de5af0 | 802 | pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE; |
c85994e4 DW |
803 | if (cmpxchg64(&pte->val, 0ULL, pteval)) { |
804 | /* Someone else set it while we were thinking; use theirs. */ | |
805 | free_pgtable_page(tmp_page); | |
806 | } else { | |
807 | dma_pte_addr(pte); | |
808 | domain_flush_cache(domain, pte, sizeof(*pte)); | |
809 | } | |
ba395927 | 810 | } |
19c239ce | 811 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
812 | level--; |
813 | } | |
814 | ||
ba395927 KA |
815 | return pte; |
816 | } | |
817 | ||
6dd9a7c7 | 818 | |
ba395927 | 819 | /* return address's pte at specific level */ |
90dcfb5e DW |
820 | static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, |
821 | unsigned long pfn, | |
6dd9a7c7 | 822 | int level, int *large_page) |
ba395927 KA |
823 | { |
824 | struct dma_pte *parent, *pte = NULL; | |
825 | int total = agaw_to_level(domain->agaw); | |
826 | int offset; | |
827 | ||
828 | parent = domain->pgd; | |
829 | while (level <= total) { | |
90dcfb5e | 830 | offset = pfn_level_offset(pfn, total); |
ba395927 KA |
831 | pte = &parent[offset]; |
832 | if (level == total) | |
833 | return pte; | |
834 | ||
6dd9a7c7 YS |
835 | if (!dma_pte_present(pte)) { |
836 | *large_page = total; | |
ba395927 | 837 | break; |
6dd9a7c7 YS |
838 | } |
839 | ||
840 | if (pte->val & DMA_PTE_LARGE_PAGE) { | |
841 | *large_page = total; | |
842 | return pte; | |
843 | } | |
844 | ||
19c239ce | 845 | parent = phys_to_virt(dma_pte_addr(pte)); |
ba395927 KA |
846 | total--; |
847 | } | |
848 | return NULL; | |
849 | } | |
850 | ||
ba395927 | 851 | /* clear last level pte, a tlb flush should be followed */ |
292827cb | 852 | static int dma_pte_clear_range(struct dmar_domain *domain, |
595badf5 DW |
853 | unsigned long start_pfn, |
854 | unsigned long last_pfn) | |
ba395927 | 855 | { |
04b18e65 | 856 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
6dd9a7c7 | 857 | unsigned int large_page = 1; |
310a5ab9 | 858 | struct dma_pte *first_pte, *pte; |
292827cb | 859 | int order; |
66eae846 | 860 | |
04b18e65 | 861 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
595badf5 | 862 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); |
59c36286 | 863 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 864 | |
04b18e65 | 865 | /* we don't need lock here; nobody else touches the iova range */ |
59c36286 | 866 | do { |
6dd9a7c7 YS |
867 | large_page = 1; |
868 | first_pte = pte = dma_pfn_level_pte(domain, start_pfn, 1, &large_page); | |
310a5ab9 | 869 | if (!pte) { |
6dd9a7c7 | 870 | start_pfn = align_to_level(start_pfn + 1, large_page + 1); |
310a5ab9 DW |
871 | continue; |
872 | } | |
6dd9a7c7 | 873 | do { |
310a5ab9 | 874 | dma_clear_pte(pte); |
6dd9a7c7 | 875 | start_pfn += lvl_to_nr_pages(large_page); |
310a5ab9 | 876 | pte++; |
75e6bf96 DW |
877 | } while (start_pfn <= last_pfn && !first_pte_in_page(pte)); |
878 | ||
310a5ab9 DW |
879 | domain_flush_cache(domain, first_pte, |
880 | (void *)pte - (void *)first_pte); | |
59c36286 DW |
881 | |
882 | } while (start_pfn && start_pfn <= last_pfn); | |
292827cb AK |
883 | |
884 | order = (large_page - 1) * 9; | |
885 | return order; | |
ba395927 KA |
886 | } |
887 | ||
888 | /* free page table pages. last level pte should already be cleared */ | |
889 | static void dma_pte_free_pagetable(struct dmar_domain *domain, | |
d794dc9b DW |
890 | unsigned long start_pfn, |
891 | unsigned long last_pfn) | |
ba395927 | 892 | { |
6660c63a | 893 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
f3a0a52f | 894 | struct dma_pte *first_pte, *pte; |
ba395927 KA |
895 | int total = agaw_to_level(domain->agaw); |
896 | int level; | |
6660c63a | 897 | unsigned long tmp; |
6dd9a7c7 | 898 | int large_page = 2; |
ba395927 | 899 | |
6660c63a DW |
900 | BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); |
901 | BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); | |
59c36286 | 902 | BUG_ON(start_pfn > last_pfn); |
ba395927 | 903 | |
f3a0a52f | 904 | /* We don't need lock here; nobody else touches the iova range */ |
ba395927 KA |
905 | level = 2; |
906 | while (level <= total) { | |
6660c63a DW |
907 | tmp = align_to_level(start_pfn, level); |
908 | ||
f3a0a52f | 909 | /* If we can't even clear one PTE at this level, we're done */ |
6660c63a | 910 | if (tmp + level_size(level) - 1 > last_pfn) |
ba395927 KA |
911 | return; |
912 | ||
59c36286 | 913 | do { |
6dd9a7c7 YS |
914 | large_page = level; |
915 | first_pte = pte = dma_pfn_level_pte(domain, tmp, level, &large_page); | |
916 | if (large_page > level) | |
917 | level = large_page + 1; | |
f3a0a52f DW |
918 | if (!pte) { |
919 | tmp = align_to_level(tmp + 1, level + 1); | |
920 | continue; | |
921 | } | |
75e6bf96 | 922 | do { |
6a43e574 DW |
923 | if (dma_pte_present(pte)) { |
924 | free_pgtable_page(phys_to_virt(dma_pte_addr(pte))); | |
925 | dma_clear_pte(pte); | |
926 | } | |
f3a0a52f DW |
927 | pte++; |
928 | tmp += level_size(level); | |
75e6bf96 DW |
929 | } while (!first_pte_in_page(pte) && |
930 | tmp + level_size(level) - 1 <= last_pfn); | |
931 | ||
f3a0a52f DW |
932 | domain_flush_cache(domain, first_pte, |
933 | (void *)pte - (void *)first_pte); | |
934 | ||
59c36286 | 935 | } while (tmp && tmp + level_size(level) - 1 <= last_pfn); |
ba395927 KA |
936 | level++; |
937 | } | |
938 | /* free pgd */ | |
d794dc9b | 939 | if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { |
ba395927 KA |
940 | free_pgtable_page(domain->pgd); |
941 | domain->pgd = NULL; | |
942 | } | |
943 | } | |
944 | ||
945 | /* iommu handling */ | |
946 | static int iommu_alloc_root_entry(struct intel_iommu *iommu) | |
947 | { | |
948 | struct root_entry *root; | |
949 | unsigned long flags; | |
950 | ||
4c923d47 | 951 | root = (struct root_entry *)alloc_pgtable_page(iommu->node); |
ba395927 KA |
952 | if (!root) |
953 | return -ENOMEM; | |
954 | ||
5b6985ce | 955 | __iommu_flush_cache(iommu, root, ROOT_SIZE); |
ba395927 KA |
956 | |
957 | spin_lock_irqsave(&iommu->lock, flags); | |
958 | iommu->root_entry = root; | |
959 | spin_unlock_irqrestore(&iommu->lock, flags); | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
ba395927 KA |
964 | static void iommu_set_root_entry(struct intel_iommu *iommu) |
965 | { | |
966 | void *addr; | |
c416daa9 | 967 | u32 sts; |
ba395927 KA |
968 | unsigned long flag; |
969 | ||
970 | addr = iommu->root_entry; | |
971 | ||
1f5b3c3f | 972 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
973 | dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr)); |
974 | ||
c416daa9 | 975 | writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
976 | |
977 | /* Make sure hardware complete it */ | |
978 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 979 | readl, (sts & DMA_GSTS_RTPS), sts); |
ba395927 | 980 | |
1f5b3c3f | 981 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
982 | } |
983 | ||
984 | static void iommu_flush_write_buffer(struct intel_iommu *iommu) | |
985 | { | |
986 | u32 val; | |
987 | unsigned long flag; | |
988 | ||
9af88143 | 989 | if (!rwbf_quirk && !cap_rwbf(iommu->cap)) |
ba395927 | 990 | return; |
ba395927 | 991 | |
1f5b3c3f | 992 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
462b60f6 | 993 | writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); |
ba395927 KA |
994 | |
995 | /* Make sure hardware complete it */ | |
996 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 997 | readl, (!(val & DMA_GSTS_WBFS)), val); |
ba395927 | 998 | |
1f5b3c3f | 999 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1000 | } |
1001 | ||
1002 | /* return value determine if we need a write buffer flush */ | |
4c25a2c1 DW |
1003 | static void __iommu_flush_context(struct intel_iommu *iommu, |
1004 | u16 did, u16 source_id, u8 function_mask, | |
1005 | u64 type) | |
ba395927 KA |
1006 | { |
1007 | u64 val = 0; | |
1008 | unsigned long flag; | |
1009 | ||
ba395927 KA |
1010 | switch (type) { |
1011 | case DMA_CCMD_GLOBAL_INVL: | |
1012 | val = DMA_CCMD_GLOBAL_INVL; | |
1013 | break; | |
1014 | case DMA_CCMD_DOMAIN_INVL: | |
1015 | val = DMA_CCMD_DOMAIN_INVL|DMA_CCMD_DID(did); | |
1016 | break; | |
1017 | case DMA_CCMD_DEVICE_INVL: | |
1018 | val = DMA_CCMD_DEVICE_INVL|DMA_CCMD_DID(did) | |
1019 | | DMA_CCMD_SID(source_id) | DMA_CCMD_FM(function_mask); | |
1020 | break; | |
1021 | default: | |
1022 | BUG(); | |
1023 | } | |
1024 | val |= DMA_CCMD_ICC; | |
1025 | ||
1f5b3c3f | 1026 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1027 | dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); |
1028 | ||
1029 | /* Make sure hardware complete it */ | |
1030 | IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, | |
1031 | dmar_readq, (!(val & DMA_CCMD_ICC)), val); | |
1032 | ||
1f5b3c3f | 1033 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1034 | } |
1035 | ||
ba395927 | 1036 | /* return value determine if we need a write buffer flush */ |
1f0ef2aa DW |
1037 | static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, |
1038 | u64 addr, unsigned int size_order, u64 type) | |
ba395927 KA |
1039 | { |
1040 | int tlb_offset = ecap_iotlb_offset(iommu->ecap); | |
1041 | u64 val = 0, val_iva = 0; | |
1042 | unsigned long flag; | |
1043 | ||
ba395927 KA |
1044 | switch (type) { |
1045 | case DMA_TLB_GLOBAL_FLUSH: | |
1046 | /* global flush doesn't need set IVA_REG */ | |
1047 | val = DMA_TLB_GLOBAL_FLUSH|DMA_TLB_IVT; | |
1048 | break; | |
1049 | case DMA_TLB_DSI_FLUSH: | |
1050 | val = DMA_TLB_DSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
1051 | break; | |
1052 | case DMA_TLB_PSI_FLUSH: | |
1053 | val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); | |
1054 | /* Note: always flush non-leaf currently */ | |
1055 | val_iva = size_order | addr; | |
1056 | break; | |
1057 | default: | |
1058 | BUG(); | |
1059 | } | |
1060 | /* Note: set drain read/write */ | |
1061 | #if 0 | |
1062 | /* | |
1063 | * This is probably to be super secure.. Looks like we can | |
1064 | * ignore it without any impact. | |
1065 | */ | |
1066 | if (cap_read_drain(iommu->cap)) | |
1067 | val |= DMA_TLB_READ_DRAIN; | |
1068 | #endif | |
1069 | if (cap_write_drain(iommu->cap)) | |
1070 | val |= DMA_TLB_WRITE_DRAIN; | |
1071 | ||
1f5b3c3f | 1072 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1073 | /* Note: Only uses first TLB reg currently */ |
1074 | if (val_iva) | |
1075 | dmar_writeq(iommu->reg + tlb_offset, val_iva); | |
1076 | dmar_writeq(iommu->reg + tlb_offset + 8, val); | |
1077 | ||
1078 | /* Make sure hardware complete it */ | |
1079 | IOMMU_WAIT_OP(iommu, tlb_offset + 8, | |
1080 | dmar_readq, (!(val & DMA_TLB_IVT)), val); | |
1081 | ||
1f5b3c3f | 1082 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1083 | |
1084 | /* check IOTLB invalidation granularity */ | |
1085 | if (DMA_TLB_IAIG(val) == 0) | |
1086 | printk(KERN_ERR"IOMMU: flush IOTLB failed\n"); | |
1087 | if (DMA_TLB_IAIG(val) != DMA_TLB_IIRG(type)) | |
1088 | pr_debug("IOMMU: tlb flush request %Lx, actual %Lx\n", | |
5b6985ce FY |
1089 | (unsigned long long)DMA_TLB_IIRG(type), |
1090 | (unsigned long long)DMA_TLB_IAIG(val)); | |
ba395927 KA |
1091 | } |
1092 | ||
93a23a72 YZ |
1093 | static struct device_domain_info *iommu_support_dev_iotlb( |
1094 | struct dmar_domain *domain, int segment, u8 bus, u8 devfn) | |
1095 | { | |
1096 | int found = 0; | |
1097 | unsigned long flags; | |
1098 | struct device_domain_info *info; | |
1099 | struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); | |
1100 | ||
1101 | if (!ecap_dev_iotlb_support(iommu->ecap)) | |
1102 | return NULL; | |
1103 | ||
1104 | if (!iommu->qi) | |
1105 | return NULL; | |
1106 | ||
1107 | spin_lock_irqsave(&device_domain_lock, flags); | |
1108 | list_for_each_entry(info, &domain->devices, link) | |
1109 | if (info->bus == bus && info->devfn == devfn) { | |
1110 | found = 1; | |
1111 | break; | |
1112 | } | |
1113 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1114 | ||
1115 | if (!found || !info->dev) | |
1116 | return NULL; | |
1117 | ||
1118 | if (!pci_find_ext_capability(info->dev, PCI_EXT_CAP_ID_ATS)) | |
1119 | return NULL; | |
1120 | ||
1121 | if (!dmar_find_matched_atsr_unit(info->dev)) | |
1122 | return NULL; | |
1123 | ||
1124 | info->iommu = iommu; | |
1125 | ||
1126 | return info; | |
1127 | } | |
1128 | ||
1129 | static void iommu_enable_dev_iotlb(struct device_domain_info *info) | |
ba395927 | 1130 | { |
93a23a72 YZ |
1131 | if (!info) |
1132 | return; | |
1133 | ||
1134 | pci_enable_ats(info->dev, VTD_PAGE_SHIFT); | |
1135 | } | |
1136 | ||
1137 | static void iommu_disable_dev_iotlb(struct device_domain_info *info) | |
1138 | { | |
1139 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1140 | return; | |
1141 | ||
1142 | pci_disable_ats(info->dev); | |
1143 | } | |
1144 | ||
1145 | static void iommu_flush_dev_iotlb(struct dmar_domain *domain, | |
1146 | u64 addr, unsigned mask) | |
1147 | { | |
1148 | u16 sid, qdep; | |
1149 | unsigned long flags; | |
1150 | struct device_domain_info *info; | |
1151 | ||
1152 | spin_lock_irqsave(&device_domain_lock, flags); | |
1153 | list_for_each_entry(info, &domain->devices, link) { | |
1154 | if (!info->dev || !pci_ats_enabled(info->dev)) | |
1155 | continue; | |
1156 | ||
1157 | sid = info->bus << 8 | info->devfn; | |
1158 | qdep = pci_ats_queue_depth(info->dev); | |
1159 | qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); | |
1160 | } | |
1161 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1162 | } | |
1163 | ||
1f0ef2aa | 1164 | static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, |
82653633 | 1165 | unsigned long pfn, unsigned int pages, int map) |
ba395927 | 1166 | { |
9dd2fe89 | 1167 | unsigned int mask = ilog2(__roundup_pow_of_two(pages)); |
03d6a246 | 1168 | uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; |
ba395927 | 1169 | |
ba395927 KA |
1170 | BUG_ON(pages == 0); |
1171 | ||
ba395927 | 1172 | /* |
9dd2fe89 YZ |
1173 | * Fallback to domain selective flush if no PSI support or the size is |
1174 | * too big. | |
ba395927 KA |
1175 | * PSI requires page size to be 2 ^ x, and the base address is naturally |
1176 | * aligned to the size | |
1177 | */ | |
9dd2fe89 YZ |
1178 | if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap)) |
1179 | iommu->flush.flush_iotlb(iommu, did, 0, 0, | |
1f0ef2aa | 1180 | DMA_TLB_DSI_FLUSH); |
9dd2fe89 YZ |
1181 | else |
1182 | iommu->flush.flush_iotlb(iommu, did, addr, mask, | |
1183 | DMA_TLB_PSI_FLUSH); | |
bf92df30 YZ |
1184 | |
1185 | /* | |
82653633 NA |
1186 | * In caching mode, changes of pages from non-present to present require |
1187 | * flush. However, device IOTLB doesn't need to be flushed in this case. | |
bf92df30 | 1188 | */ |
82653633 | 1189 | if (!cap_caching_mode(iommu->cap) || !map) |
93a23a72 | 1190 | iommu_flush_dev_iotlb(iommu->domains[did], addr, mask); |
ba395927 KA |
1191 | } |
1192 | ||
f8bab735 | 1193 | static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) |
1194 | { | |
1195 | u32 pmen; | |
1196 | unsigned long flags; | |
1197 | ||
1f5b3c3f | 1198 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
f8bab735 | 1199 | pmen = readl(iommu->reg + DMAR_PMEN_REG); |
1200 | pmen &= ~DMA_PMEN_EPM; | |
1201 | writel(pmen, iommu->reg + DMAR_PMEN_REG); | |
1202 | ||
1203 | /* wait for the protected region status bit to clear */ | |
1204 | IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, | |
1205 | readl, !(pmen & DMA_PMEN_PRS), pmen); | |
1206 | ||
1f5b3c3f | 1207 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
f8bab735 | 1208 | } |
1209 | ||
ba395927 KA |
1210 | static int iommu_enable_translation(struct intel_iommu *iommu) |
1211 | { | |
1212 | u32 sts; | |
1213 | unsigned long flags; | |
1214 | ||
1f5b3c3f | 1215 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
c416daa9 DW |
1216 | iommu->gcmd |= DMA_GCMD_TE; |
1217 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
ba395927 KA |
1218 | |
1219 | /* Make sure hardware complete it */ | |
1220 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1221 | readl, (sts & DMA_GSTS_TES), sts); |
ba395927 | 1222 | |
1f5b3c3f | 1223 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
ba395927 KA |
1224 | return 0; |
1225 | } | |
1226 | ||
1227 | static int iommu_disable_translation(struct intel_iommu *iommu) | |
1228 | { | |
1229 | u32 sts; | |
1230 | unsigned long flag; | |
1231 | ||
1f5b3c3f | 1232 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
ba395927 KA |
1233 | iommu->gcmd &= ~DMA_GCMD_TE; |
1234 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); | |
1235 | ||
1236 | /* Make sure hardware complete it */ | |
1237 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, | |
c416daa9 | 1238 | readl, (!(sts & DMA_GSTS_TES)), sts); |
ba395927 | 1239 | |
1f5b3c3f | 1240 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
ba395927 KA |
1241 | return 0; |
1242 | } | |
1243 | ||
3460a6d9 | 1244 | |
ba395927 KA |
1245 | static int iommu_init_domains(struct intel_iommu *iommu) |
1246 | { | |
1247 | unsigned long ndomains; | |
1248 | unsigned long nlongs; | |
1249 | ||
1250 | ndomains = cap_ndoms(iommu->cap); | |
68aeb968 | 1251 | pr_debug("IOMMU %d: Number of Domains supported <%ld>\n", iommu->seq_id, |
680a7524 | 1252 | ndomains); |
ba395927 KA |
1253 | nlongs = BITS_TO_LONGS(ndomains); |
1254 | ||
94a91b50 DD |
1255 | spin_lock_init(&iommu->lock); |
1256 | ||
ba395927 KA |
1257 | /* TBD: there might be 64K domains, |
1258 | * consider other allocation for future chip | |
1259 | */ | |
1260 | iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); | |
1261 | if (!iommu->domain_ids) { | |
1262 | printk(KERN_ERR "Allocating domain id array failed\n"); | |
1263 | return -ENOMEM; | |
1264 | } | |
1265 | iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *), | |
1266 | GFP_KERNEL); | |
1267 | if (!iommu->domains) { | |
1268 | printk(KERN_ERR "Allocating domain array failed\n"); | |
ba395927 KA |
1269 | return -ENOMEM; |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * if Caching mode is set, then invalid translations are tagged | |
1274 | * with domainid 0. Hence we need to pre-allocate it. | |
1275 | */ | |
1276 | if (cap_caching_mode(iommu->cap)) | |
1277 | set_bit(0, iommu->domain_ids); | |
1278 | return 0; | |
1279 | } | |
ba395927 | 1280 | |
ba395927 KA |
1281 | |
1282 | static void domain_exit(struct dmar_domain *domain); | |
5e98c4b1 | 1283 | static void vm_domain_exit(struct dmar_domain *domain); |
e61d98d8 SS |
1284 | |
1285 | void free_dmar_iommu(struct intel_iommu *iommu) | |
ba395927 KA |
1286 | { |
1287 | struct dmar_domain *domain; | |
1288 | int i; | |
c7151a8d | 1289 | unsigned long flags; |
ba395927 | 1290 | |
94a91b50 | 1291 | if ((iommu->domains) && (iommu->domain_ids)) { |
a45946ab | 1292 | for_each_set_bit(i, iommu->domain_ids, cap_ndoms(iommu->cap)) { |
94a91b50 DD |
1293 | domain = iommu->domains[i]; |
1294 | clear_bit(i, iommu->domain_ids); | |
1295 | ||
1296 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1297 | if (--domain->iommu_count == 0) { | |
1298 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) | |
1299 | vm_domain_exit(domain); | |
1300 | else | |
1301 | domain_exit(domain); | |
1302 | } | |
1303 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
5e98c4b1 | 1304 | } |
ba395927 KA |
1305 | } |
1306 | ||
1307 | if (iommu->gcmd & DMA_GCMD_TE) | |
1308 | iommu_disable_translation(iommu); | |
1309 | ||
1310 | if (iommu->irq) { | |
dced35ae | 1311 | irq_set_handler_data(iommu->irq, NULL); |
ba395927 KA |
1312 | /* This will mask the irq */ |
1313 | free_irq(iommu->irq, iommu); | |
1314 | destroy_irq(iommu->irq); | |
1315 | } | |
1316 | ||
1317 | kfree(iommu->domains); | |
1318 | kfree(iommu->domain_ids); | |
1319 | ||
d9630fe9 WH |
1320 | g_iommus[iommu->seq_id] = NULL; |
1321 | ||
1322 | /* if all iommus are freed, free g_iommus */ | |
1323 | for (i = 0; i < g_num_of_iommus; i++) { | |
1324 | if (g_iommus[i]) | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | if (i == g_num_of_iommus) | |
1329 | kfree(g_iommus); | |
1330 | ||
ba395927 KA |
1331 | /* free context mapping */ |
1332 | free_context_table(iommu); | |
ba395927 KA |
1333 | } |
1334 | ||
2c2e2c38 | 1335 | static struct dmar_domain *alloc_domain(void) |
ba395927 | 1336 | { |
ba395927 | 1337 | struct dmar_domain *domain; |
ba395927 KA |
1338 | |
1339 | domain = alloc_domain_mem(); | |
1340 | if (!domain) | |
1341 | return NULL; | |
1342 | ||
4c923d47 | 1343 | domain->nid = -1; |
1b198bb0 | 1344 | memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); |
2c2e2c38 FY |
1345 | domain->flags = 0; |
1346 | ||
1347 | return domain; | |
1348 | } | |
1349 | ||
1350 | static int iommu_attach_domain(struct dmar_domain *domain, | |
1351 | struct intel_iommu *iommu) | |
1352 | { | |
1353 | int num; | |
1354 | unsigned long ndomains; | |
1355 | unsigned long flags; | |
1356 | ||
ba395927 KA |
1357 | ndomains = cap_ndoms(iommu->cap); |
1358 | ||
1359 | spin_lock_irqsave(&iommu->lock, flags); | |
2c2e2c38 | 1360 | |
ba395927 KA |
1361 | num = find_first_zero_bit(iommu->domain_ids, ndomains); |
1362 | if (num >= ndomains) { | |
1363 | spin_unlock_irqrestore(&iommu->lock, flags); | |
ba395927 | 1364 | printk(KERN_ERR "IOMMU: no free domain ids\n"); |
2c2e2c38 | 1365 | return -ENOMEM; |
ba395927 KA |
1366 | } |
1367 | ||
ba395927 | 1368 | domain->id = num; |
2c2e2c38 | 1369 | set_bit(num, iommu->domain_ids); |
1b198bb0 | 1370 | set_bit(iommu->seq_id, domain->iommu_bmp); |
ba395927 KA |
1371 | iommu->domains[num] = domain; |
1372 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1373 | ||
2c2e2c38 | 1374 | return 0; |
ba395927 KA |
1375 | } |
1376 | ||
2c2e2c38 FY |
1377 | static void iommu_detach_domain(struct dmar_domain *domain, |
1378 | struct intel_iommu *iommu) | |
ba395927 KA |
1379 | { |
1380 | unsigned long flags; | |
2c2e2c38 FY |
1381 | int num, ndomains; |
1382 | int found = 0; | |
ba395927 | 1383 | |
8c11e798 | 1384 | spin_lock_irqsave(&iommu->lock, flags); |
2c2e2c38 | 1385 | ndomains = cap_ndoms(iommu->cap); |
a45946ab | 1386 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
2c2e2c38 FY |
1387 | if (iommu->domains[num] == domain) { |
1388 | found = 1; | |
1389 | break; | |
1390 | } | |
2c2e2c38 FY |
1391 | } |
1392 | ||
1393 | if (found) { | |
1394 | clear_bit(num, iommu->domain_ids); | |
1b198bb0 | 1395 | clear_bit(iommu->seq_id, domain->iommu_bmp); |
2c2e2c38 FY |
1396 | iommu->domains[num] = NULL; |
1397 | } | |
8c11e798 | 1398 | spin_unlock_irqrestore(&iommu->lock, flags); |
ba395927 KA |
1399 | } |
1400 | ||
1401 | static struct iova_domain reserved_iova_list; | |
8a443df4 | 1402 | static struct lock_class_key reserved_rbtree_key; |
ba395927 | 1403 | |
51a63e67 | 1404 | static int dmar_init_reserved_ranges(void) |
ba395927 KA |
1405 | { |
1406 | struct pci_dev *pdev = NULL; | |
1407 | struct iova *iova; | |
1408 | int i; | |
ba395927 | 1409 | |
f661197e | 1410 | init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN); |
ba395927 | 1411 | |
8a443df4 MG |
1412 | lockdep_set_class(&reserved_iova_list.iova_rbtree_lock, |
1413 | &reserved_rbtree_key); | |
1414 | ||
ba395927 KA |
1415 | /* IOAPIC ranges shouldn't be accessed by DMA */ |
1416 | iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START), | |
1417 | IOVA_PFN(IOAPIC_RANGE_END)); | |
51a63e67 | 1418 | if (!iova) { |
ba395927 | 1419 | printk(KERN_ERR "Reserve IOAPIC range failed\n"); |
51a63e67 JC |
1420 | return -ENODEV; |
1421 | } | |
ba395927 KA |
1422 | |
1423 | /* Reserve all PCI MMIO to avoid peer-to-peer access */ | |
1424 | for_each_pci_dev(pdev) { | |
1425 | struct resource *r; | |
1426 | ||
1427 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1428 | r = &pdev->resource[i]; | |
1429 | if (!r->flags || !(r->flags & IORESOURCE_MEM)) | |
1430 | continue; | |
1a4a4551 DW |
1431 | iova = reserve_iova(&reserved_iova_list, |
1432 | IOVA_PFN(r->start), | |
1433 | IOVA_PFN(r->end)); | |
51a63e67 | 1434 | if (!iova) { |
ba395927 | 1435 | printk(KERN_ERR "Reserve iova failed\n"); |
51a63e67 JC |
1436 | return -ENODEV; |
1437 | } | |
ba395927 KA |
1438 | } |
1439 | } | |
51a63e67 | 1440 | return 0; |
ba395927 KA |
1441 | } |
1442 | ||
1443 | static void domain_reserve_special_ranges(struct dmar_domain *domain) | |
1444 | { | |
1445 | copy_reserved_iova(&reserved_iova_list, &domain->iovad); | |
1446 | } | |
1447 | ||
1448 | static inline int guestwidth_to_adjustwidth(int gaw) | |
1449 | { | |
1450 | int agaw; | |
1451 | int r = (gaw - 12) % 9; | |
1452 | ||
1453 | if (r == 0) | |
1454 | agaw = gaw; | |
1455 | else | |
1456 | agaw = gaw + 9 - r; | |
1457 | if (agaw > 64) | |
1458 | agaw = 64; | |
1459 | return agaw; | |
1460 | } | |
1461 | ||
1462 | static int domain_init(struct dmar_domain *domain, int guest_width) | |
1463 | { | |
1464 | struct intel_iommu *iommu; | |
1465 | int adjust_width, agaw; | |
1466 | unsigned long sagaw; | |
1467 | ||
f661197e | 1468 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); |
c7151a8d | 1469 | spin_lock_init(&domain->iommu_lock); |
ba395927 KA |
1470 | |
1471 | domain_reserve_special_ranges(domain); | |
1472 | ||
1473 | /* calculate AGAW */ | |
8c11e798 | 1474 | iommu = domain_get_iommu(domain); |
ba395927 KA |
1475 | if (guest_width > cap_mgaw(iommu->cap)) |
1476 | guest_width = cap_mgaw(iommu->cap); | |
1477 | domain->gaw = guest_width; | |
1478 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
1479 | agaw = width_to_agaw(adjust_width); | |
1480 | sagaw = cap_sagaw(iommu->cap); | |
1481 | if (!test_bit(agaw, &sagaw)) { | |
1482 | /* hardware doesn't support it, choose a bigger one */ | |
1483 | pr_debug("IOMMU: hardware doesn't support agaw %d\n", agaw); | |
1484 | agaw = find_next_bit(&sagaw, 5, agaw); | |
1485 | if (agaw >= 5) | |
1486 | return -ENODEV; | |
1487 | } | |
1488 | domain->agaw = agaw; | |
1489 | INIT_LIST_HEAD(&domain->devices); | |
1490 | ||
8e604097 WH |
1491 | if (ecap_coherent(iommu->ecap)) |
1492 | domain->iommu_coherency = 1; | |
1493 | else | |
1494 | domain->iommu_coherency = 0; | |
1495 | ||
58c610bd SY |
1496 | if (ecap_sc_support(iommu->ecap)) |
1497 | domain->iommu_snooping = 1; | |
1498 | else | |
1499 | domain->iommu_snooping = 0; | |
1500 | ||
6dd9a7c7 | 1501 | domain->iommu_superpage = fls(cap_super_page_val(iommu->cap)); |
c7151a8d | 1502 | domain->iommu_count = 1; |
4c923d47 | 1503 | domain->nid = iommu->node; |
c7151a8d | 1504 | |
ba395927 | 1505 | /* always allocate the top pgd */ |
4c923d47 | 1506 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
ba395927 KA |
1507 | if (!domain->pgd) |
1508 | return -ENOMEM; | |
5b6985ce | 1509 | __iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE); |
ba395927 KA |
1510 | return 0; |
1511 | } | |
1512 | ||
1513 | static void domain_exit(struct dmar_domain *domain) | |
1514 | { | |
2c2e2c38 FY |
1515 | struct dmar_drhd_unit *drhd; |
1516 | struct intel_iommu *iommu; | |
ba395927 KA |
1517 | |
1518 | /* Domain 0 is reserved, so dont process it */ | |
1519 | if (!domain) | |
1520 | return; | |
1521 | ||
7b668357 AW |
1522 | /* Flush any lazy unmaps that may reference this domain */ |
1523 | if (!intel_iommu_strict) | |
1524 | flush_unmaps_timeout(0); | |
1525 | ||
ba395927 KA |
1526 | domain_remove_dev_info(domain); |
1527 | /* destroy iovas */ | |
1528 | put_iova_domain(&domain->iovad); | |
ba395927 KA |
1529 | |
1530 | /* clear ptes */ | |
595badf5 | 1531 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 KA |
1532 | |
1533 | /* free page tables */ | |
d794dc9b | 1534 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
ba395927 | 1535 | |
2c2e2c38 | 1536 | for_each_active_iommu(iommu, drhd) |
1b198bb0 | 1537 | if (test_bit(iommu->seq_id, domain->iommu_bmp)) |
2c2e2c38 FY |
1538 | iommu_detach_domain(domain, iommu); |
1539 | ||
ba395927 KA |
1540 | free_domain_mem(domain); |
1541 | } | |
1542 | ||
4ed0d3e6 FY |
1543 | static int domain_context_mapping_one(struct dmar_domain *domain, int segment, |
1544 | u8 bus, u8 devfn, int translation) | |
ba395927 KA |
1545 | { |
1546 | struct context_entry *context; | |
ba395927 | 1547 | unsigned long flags; |
5331fe6f | 1548 | struct intel_iommu *iommu; |
ea6606b0 WH |
1549 | struct dma_pte *pgd; |
1550 | unsigned long num; | |
1551 | unsigned long ndomains; | |
1552 | int id; | |
1553 | int agaw; | |
93a23a72 | 1554 | struct device_domain_info *info = NULL; |
ba395927 KA |
1555 | |
1556 | pr_debug("Set context mapping for %02x:%02x.%d\n", | |
1557 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
4ed0d3e6 | 1558 | |
ba395927 | 1559 | BUG_ON(!domain->pgd); |
4ed0d3e6 FY |
1560 | BUG_ON(translation != CONTEXT_TT_PASS_THROUGH && |
1561 | translation != CONTEXT_TT_MULTI_LEVEL); | |
5331fe6f | 1562 | |
276dbf99 | 1563 | iommu = device_to_iommu(segment, bus, devfn); |
5331fe6f WH |
1564 | if (!iommu) |
1565 | return -ENODEV; | |
1566 | ||
ba395927 KA |
1567 | context = device_to_context_entry(iommu, bus, devfn); |
1568 | if (!context) | |
1569 | return -ENOMEM; | |
1570 | spin_lock_irqsave(&iommu->lock, flags); | |
c07e7d21 | 1571 | if (context_present(context)) { |
ba395927 KA |
1572 | spin_unlock_irqrestore(&iommu->lock, flags); |
1573 | return 0; | |
1574 | } | |
1575 | ||
ea6606b0 WH |
1576 | id = domain->id; |
1577 | pgd = domain->pgd; | |
1578 | ||
2c2e2c38 FY |
1579 | if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
1580 | domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) { | |
ea6606b0 WH |
1581 | int found = 0; |
1582 | ||
1583 | /* find an available domain id for this device in iommu */ | |
1584 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 1585 | for_each_set_bit(num, iommu->domain_ids, ndomains) { |
ea6606b0 WH |
1586 | if (iommu->domains[num] == domain) { |
1587 | id = num; | |
1588 | found = 1; | |
1589 | break; | |
1590 | } | |
ea6606b0 WH |
1591 | } |
1592 | ||
1593 | if (found == 0) { | |
1594 | num = find_first_zero_bit(iommu->domain_ids, ndomains); | |
1595 | if (num >= ndomains) { | |
1596 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1597 | printk(KERN_ERR "IOMMU: no free domain ids\n"); | |
1598 | return -EFAULT; | |
1599 | } | |
1600 | ||
1601 | set_bit(num, iommu->domain_ids); | |
1602 | iommu->domains[num] = domain; | |
1603 | id = num; | |
1604 | } | |
1605 | ||
1606 | /* Skip top levels of page tables for | |
1607 | * iommu which has less agaw than default. | |
1672af11 | 1608 | * Unnecessary for PT mode. |
ea6606b0 | 1609 | */ |
1672af11 CW |
1610 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1611 | for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) { | |
1612 | pgd = phys_to_virt(dma_pte_addr(pgd)); | |
1613 | if (!dma_pte_present(pgd)) { | |
1614 | spin_unlock_irqrestore(&iommu->lock, flags); | |
1615 | return -ENOMEM; | |
1616 | } | |
ea6606b0 WH |
1617 | } |
1618 | } | |
1619 | } | |
1620 | ||
1621 | context_set_domain_id(context, id); | |
4ed0d3e6 | 1622 | |
93a23a72 YZ |
1623 | if (translation != CONTEXT_TT_PASS_THROUGH) { |
1624 | info = iommu_support_dev_iotlb(domain, segment, bus, devfn); | |
1625 | translation = info ? CONTEXT_TT_DEV_IOTLB : | |
1626 | CONTEXT_TT_MULTI_LEVEL; | |
1627 | } | |
4ed0d3e6 FY |
1628 | /* |
1629 | * In pass through mode, AW must be programmed to indicate the largest | |
1630 | * AGAW value supported by hardware. And ASR is ignored by hardware. | |
1631 | */ | |
93a23a72 | 1632 | if (unlikely(translation == CONTEXT_TT_PASS_THROUGH)) |
4ed0d3e6 | 1633 | context_set_address_width(context, iommu->msagaw); |
93a23a72 YZ |
1634 | else { |
1635 | context_set_address_root(context, virt_to_phys(pgd)); | |
1636 | context_set_address_width(context, iommu->agaw); | |
1637 | } | |
4ed0d3e6 FY |
1638 | |
1639 | context_set_translation_type(context, translation); | |
c07e7d21 MM |
1640 | context_set_fault_enable(context); |
1641 | context_set_present(context); | |
5331fe6f | 1642 | domain_flush_cache(domain, context, sizeof(*context)); |
ba395927 | 1643 | |
4c25a2c1 DW |
1644 | /* |
1645 | * It's a non-present to present mapping. If hardware doesn't cache | |
1646 | * non-present entry we only need to flush the write-buffer. If the | |
1647 | * _does_ cache non-present entries, then it does so in the special | |
1648 | * domain #0, which we have to flush: | |
1649 | */ | |
1650 | if (cap_caching_mode(iommu->cap)) { | |
1651 | iommu->flush.flush_context(iommu, 0, | |
1652 | (((u16)bus) << 8) | devfn, | |
1653 | DMA_CCMD_MASK_NOBIT, | |
1654 | DMA_CCMD_DEVICE_INVL); | |
82653633 | 1655 | iommu->flush.flush_iotlb(iommu, domain->id, 0, 0, DMA_TLB_DSI_FLUSH); |
4c25a2c1 | 1656 | } else { |
ba395927 | 1657 | iommu_flush_write_buffer(iommu); |
4c25a2c1 | 1658 | } |
93a23a72 | 1659 | iommu_enable_dev_iotlb(info); |
ba395927 | 1660 | spin_unlock_irqrestore(&iommu->lock, flags); |
c7151a8d WH |
1661 | |
1662 | spin_lock_irqsave(&domain->iommu_lock, flags); | |
1b198bb0 | 1663 | if (!test_and_set_bit(iommu->seq_id, domain->iommu_bmp)) { |
c7151a8d | 1664 | domain->iommu_count++; |
4c923d47 SS |
1665 | if (domain->iommu_count == 1) |
1666 | domain->nid = iommu->node; | |
58c610bd | 1667 | domain_update_iommu_cap(domain); |
c7151a8d WH |
1668 | } |
1669 | spin_unlock_irqrestore(&domain->iommu_lock, flags); | |
ba395927 KA |
1670 | return 0; |
1671 | } | |
1672 | ||
1673 | static int | |
4ed0d3e6 FY |
1674 | domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, |
1675 | int translation) | |
ba395927 KA |
1676 | { |
1677 | int ret; | |
1678 | struct pci_dev *tmp, *parent; | |
1679 | ||
276dbf99 | 1680 | ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus), |
4ed0d3e6 FY |
1681 | pdev->bus->number, pdev->devfn, |
1682 | translation); | |
ba395927 KA |
1683 | if (ret) |
1684 | return ret; | |
1685 | ||
1686 | /* dependent device mapping */ | |
1687 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1688 | if (!tmp) | |
1689 | return 0; | |
1690 | /* Secondary interface's bus number and devfn 0 */ | |
1691 | parent = pdev->bus->self; | |
1692 | while (parent != tmp) { | |
276dbf99 DW |
1693 | ret = domain_context_mapping_one(domain, |
1694 | pci_domain_nr(parent->bus), | |
1695 | parent->bus->number, | |
4ed0d3e6 | 1696 | parent->devfn, translation); |
ba395927 KA |
1697 | if (ret) |
1698 | return ret; | |
1699 | parent = parent->bus->self; | |
1700 | } | |
45e829ea | 1701 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
ba395927 | 1702 | return domain_context_mapping_one(domain, |
276dbf99 | 1703 | pci_domain_nr(tmp->subordinate), |
4ed0d3e6 FY |
1704 | tmp->subordinate->number, 0, |
1705 | translation); | |
ba395927 KA |
1706 | else /* this is a legacy PCI bridge */ |
1707 | return domain_context_mapping_one(domain, | |
276dbf99 DW |
1708 | pci_domain_nr(tmp->bus), |
1709 | tmp->bus->number, | |
4ed0d3e6 FY |
1710 | tmp->devfn, |
1711 | translation); | |
ba395927 KA |
1712 | } |
1713 | ||
5331fe6f | 1714 | static int domain_context_mapped(struct pci_dev *pdev) |
ba395927 KA |
1715 | { |
1716 | int ret; | |
1717 | struct pci_dev *tmp, *parent; | |
5331fe6f WH |
1718 | struct intel_iommu *iommu; |
1719 | ||
276dbf99 DW |
1720 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
1721 | pdev->devfn); | |
5331fe6f WH |
1722 | if (!iommu) |
1723 | return -ENODEV; | |
ba395927 | 1724 | |
276dbf99 | 1725 | ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); |
ba395927 KA |
1726 | if (!ret) |
1727 | return ret; | |
1728 | /* dependent device mapping */ | |
1729 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
1730 | if (!tmp) | |
1731 | return ret; | |
1732 | /* Secondary interface's bus number and devfn 0 */ | |
1733 | parent = pdev->bus->self; | |
1734 | while (parent != tmp) { | |
8c11e798 | 1735 | ret = device_context_mapped(iommu, parent->bus->number, |
276dbf99 | 1736 | parent->devfn); |
ba395927 KA |
1737 | if (!ret) |
1738 | return ret; | |
1739 | parent = parent->bus->self; | |
1740 | } | |
5f4d91a1 | 1741 | if (pci_is_pcie(tmp)) |
276dbf99 DW |
1742 | return device_context_mapped(iommu, tmp->subordinate->number, |
1743 | 0); | |
ba395927 | 1744 | else |
276dbf99 DW |
1745 | return device_context_mapped(iommu, tmp->bus->number, |
1746 | tmp->devfn); | |
ba395927 KA |
1747 | } |
1748 | ||
f532959b FY |
1749 | /* Returns a number of VTD pages, but aligned to MM page size */ |
1750 | static inline unsigned long aligned_nrpages(unsigned long host_addr, | |
1751 | size_t size) | |
1752 | { | |
1753 | host_addr &= ~PAGE_MASK; | |
1754 | return PAGE_ALIGN(host_addr + size) >> VTD_PAGE_SHIFT; | |
1755 | } | |
1756 | ||
6dd9a7c7 YS |
1757 | /* Return largest possible superpage level for a given mapping */ |
1758 | static inline int hardware_largepage_caps(struct dmar_domain *domain, | |
1759 | unsigned long iov_pfn, | |
1760 | unsigned long phy_pfn, | |
1761 | unsigned long pages) | |
1762 | { | |
1763 | int support, level = 1; | |
1764 | unsigned long pfnmerge; | |
1765 | ||
1766 | support = domain->iommu_superpage; | |
1767 | ||
1768 | /* To use a large page, the virtual *and* physical addresses | |
1769 | must be aligned to 2MiB/1GiB/etc. Lower bits set in either | |
1770 | of them will mean we have to use smaller pages. So just | |
1771 | merge them and check both at once. */ | |
1772 | pfnmerge = iov_pfn | phy_pfn; | |
1773 | ||
1774 | while (support && !(pfnmerge & ~VTD_STRIDE_MASK)) { | |
1775 | pages >>= VTD_STRIDE_SHIFT; | |
1776 | if (!pages) | |
1777 | break; | |
1778 | pfnmerge >>= VTD_STRIDE_SHIFT; | |
1779 | level++; | |
1780 | support--; | |
1781 | } | |
1782 | return level; | |
1783 | } | |
1784 | ||
9051aa02 DW |
1785 | static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1786 | struct scatterlist *sg, unsigned long phys_pfn, | |
1787 | unsigned long nr_pages, int prot) | |
e1605495 DW |
1788 | { |
1789 | struct dma_pte *first_pte = NULL, *pte = NULL; | |
9051aa02 | 1790 | phys_addr_t uninitialized_var(pteval); |
e1605495 | 1791 | int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; |
9051aa02 | 1792 | unsigned long sg_res; |
6dd9a7c7 YS |
1793 | unsigned int largepage_lvl = 0; |
1794 | unsigned long lvl_pages = 0; | |
e1605495 DW |
1795 | |
1796 | BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); | |
1797 | ||
1798 | if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) | |
1799 | return -EINVAL; | |
1800 | ||
1801 | prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP; | |
1802 | ||
9051aa02 DW |
1803 | if (sg) |
1804 | sg_res = 0; | |
1805 | else { | |
1806 | sg_res = nr_pages + 1; | |
1807 | pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot; | |
1808 | } | |
1809 | ||
6dd9a7c7 | 1810 | while (nr_pages > 0) { |
c85994e4 DW |
1811 | uint64_t tmp; |
1812 | ||
e1605495 | 1813 | if (!sg_res) { |
f532959b | 1814 | sg_res = aligned_nrpages(sg->offset, sg->length); |
e1605495 DW |
1815 | sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset; |
1816 | sg->dma_length = sg->length; | |
1817 | pteval = page_to_phys(sg_page(sg)) | prot; | |
6dd9a7c7 | 1818 | phys_pfn = pteval >> VTD_PAGE_SHIFT; |
e1605495 | 1819 | } |
6dd9a7c7 | 1820 | |
e1605495 | 1821 | if (!pte) { |
6dd9a7c7 YS |
1822 | largepage_lvl = hardware_largepage_caps(domain, iov_pfn, phys_pfn, sg_res); |
1823 | ||
1824 | first_pte = pte = pfn_to_dma_pte(domain, iov_pfn, largepage_lvl); | |
e1605495 DW |
1825 | if (!pte) |
1826 | return -ENOMEM; | |
6dd9a7c7 YS |
1827 | /* It is large page*/ |
1828 | if (largepage_lvl > 1) | |
1829 | pteval |= DMA_PTE_LARGE_PAGE; | |
1830 | else | |
1831 | pteval &= ~(uint64_t)DMA_PTE_LARGE_PAGE; | |
1832 | ||
e1605495 DW |
1833 | } |
1834 | /* We don't need lock here, nobody else | |
1835 | * touches the iova range | |
1836 | */ | |
7766a3fb | 1837 | tmp = cmpxchg64_local(&pte->val, 0ULL, pteval); |
c85994e4 | 1838 | if (tmp) { |
1bf20f0d | 1839 | static int dumps = 5; |
c85994e4 DW |
1840 | printk(KERN_CRIT "ERROR: DMA PTE for vPFN 0x%lx already set (to %llx not %llx)\n", |
1841 | iov_pfn, tmp, (unsigned long long)pteval); | |
1bf20f0d DW |
1842 | if (dumps) { |
1843 | dumps--; | |
1844 | debug_dma_dump_mappings(NULL); | |
1845 | } | |
1846 | WARN_ON(1); | |
1847 | } | |
6dd9a7c7 YS |
1848 | |
1849 | lvl_pages = lvl_to_nr_pages(largepage_lvl); | |
1850 | ||
1851 | BUG_ON(nr_pages < lvl_pages); | |
1852 | BUG_ON(sg_res < lvl_pages); | |
1853 | ||
1854 | nr_pages -= lvl_pages; | |
1855 | iov_pfn += lvl_pages; | |
1856 | phys_pfn += lvl_pages; | |
1857 | pteval += lvl_pages * VTD_PAGE_SIZE; | |
1858 | sg_res -= lvl_pages; | |
1859 | ||
1860 | /* If the next PTE would be the first in a new page, then we | |
1861 | need to flush the cache on the entries we've just written. | |
1862 | And then we'll need to recalculate 'pte', so clear it and | |
1863 | let it get set again in the if (!pte) block above. | |
1864 | ||
1865 | If we're done (!nr_pages) we need to flush the cache too. | |
1866 | ||
1867 | Also if we've been setting superpages, we may need to | |
1868 | recalculate 'pte' and switch back to smaller pages for the | |
1869 | end of the mapping, if the trailing size is not enough to | |
1870 | use another superpage (i.e. sg_res < lvl_pages). */ | |
e1605495 | 1871 | pte++; |
6dd9a7c7 YS |
1872 | if (!nr_pages || first_pte_in_page(pte) || |
1873 | (largepage_lvl > 1 && sg_res < lvl_pages)) { | |
e1605495 DW |
1874 | domain_flush_cache(domain, first_pte, |
1875 | (void *)pte - (void *)first_pte); | |
1876 | pte = NULL; | |
1877 | } | |
6dd9a7c7 YS |
1878 | |
1879 | if (!sg_res && nr_pages) | |
e1605495 DW |
1880 | sg = sg_next(sg); |
1881 | } | |
1882 | return 0; | |
1883 | } | |
1884 | ||
9051aa02 DW |
1885 | static inline int domain_sg_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1886 | struct scatterlist *sg, unsigned long nr_pages, | |
1887 | int prot) | |
ba395927 | 1888 | { |
9051aa02 DW |
1889 | return __domain_mapping(domain, iov_pfn, sg, 0, nr_pages, prot); |
1890 | } | |
6f6a00e4 | 1891 | |
9051aa02 DW |
1892 | static inline int domain_pfn_mapping(struct dmar_domain *domain, unsigned long iov_pfn, |
1893 | unsigned long phys_pfn, unsigned long nr_pages, | |
1894 | int prot) | |
1895 | { | |
1896 | return __domain_mapping(domain, iov_pfn, NULL, phys_pfn, nr_pages, prot); | |
ba395927 KA |
1897 | } |
1898 | ||
c7151a8d | 1899 | static void iommu_detach_dev(struct intel_iommu *iommu, u8 bus, u8 devfn) |
ba395927 | 1900 | { |
c7151a8d WH |
1901 | if (!iommu) |
1902 | return; | |
8c11e798 WH |
1903 | |
1904 | clear_context_table(iommu, bus, devfn); | |
1905 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
4c25a2c1 | 1906 | DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 1907 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
ba395927 KA |
1908 | } |
1909 | ||
109b9b04 DW |
1910 | static inline void unlink_domain_info(struct device_domain_info *info) |
1911 | { | |
1912 | assert_spin_locked(&device_domain_lock); | |
1913 | list_del(&info->link); | |
1914 | list_del(&info->global); | |
1915 | if (info->dev) | |
1916 | info->dev->dev.archdata.iommu = NULL; | |
1917 | } | |
1918 | ||
ba395927 KA |
1919 | static void domain_remove_dev_info(struct dmar_domain *domain) |
1920 | { | |
1921 | struct device_domain_info *info; | |
1922 | unsigned long flags; | |
c7151a8d | 1923 | struct intel_iommu *iommu; |
ba395927 KA |
1924 | |
1925 | spin_lock_irqsave(&device_domain_lock, flags); | |
1926 | while (!list_empty(&domain->devices)) { | |
1927 | info = list_entry(domain->devices.next, | |
1928 | struct device_domain_info, link); | |
109b9b04 | 1929 | unlink_domain_info(info); |
ba395927 KA |
1930 | spin_unlock_irqrestore(&device_domain_lock, flags); |
1931 | ||
93a23a72 | 1932 | iommu_disable_dev_iotlb(info); |
276dbf99 | 1933 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 1934 | iommu_detach_dev(iommu, info->bus, info->devfn); |
ba395927 KA |
1935 | free_devinfo_mem(info); |
1936 | ||
1937 | spin_lock_irqsave(&device_domain_lock, flags); | |
1938 | } | |
1939 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * find_domain | |
358dd8ac | 1944 | * Note: we use struct pci_dev->dev.archdata.iommu stores the info |
ba395927 | 1945 | */ |
38717946 | 1946 | static struct dmar_domain * |
ba395927 KA |
1947 | find_domain(struct pci_dev *pdev) |
1948 | { | |
1949 | struct device_domain_info *info; | |
1950 | ||
1951 | /* No lock here, assumes no domain exit in normal case */ | |
358dd8ac | 1952 | info = pdev->dev.archdata.iommu; |
ba395927 KA |
1953 | if (info) |
1954 | return info->domain; | |
1955 | return NULL; | |
1956 | } | |
1957 | ||
ba395927 KA |
1958 | /* domain is initialized */ |
1959 | static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) | |
1960 | { | |
1961 | struct dmar_domain *domain, *found = NULL; | |
1962 | struct intel_iommu *iommu; | |
1963 | struct dmar_drhd_unit *drhd; | |
1964 | struct device_domain_info *info, *tmp; | |
1965 | struct pci_dev *dev_tmp; | |
1966 | unsigned long flags; | |
1967 | int bus = 0, devfn = 0; | |
276dbf99 | 1968 | int segment; |
2c2e2c38 | 1969 | int ret; |
ba395927 KA |
1970 | |
1971 | domain = find_domain(pdev); | |
1972 | if (domain) | |
1973 | return domain; | |
1974 | ||
276dbf99 DW |
1975 | segment = pci_domain_nr(pdev->bus); |
1976 | ||
ba395927 KA |
1977 | dev_tmp = pci_find_upstream_pcie_bridge(pdev); |
1978 | if (dev_tmp) { | |
5f4d91a1 | 1979 | if (pci_is_pcie(dev_tmp)) { |
ba395927 KA |
1980 | bus = dev_tmp->subordinate->number; |
1981 | devfn = 0; | |
1982 | } else { | |
1983 | bus = dev_tmp->bus->number; | |
1984 | devfn = dev_tmp->devfn; | |
1985 | } | |
1986 | spin_lock_irqsave(&device_domain_lock, flags); | |
1987 | list_for_each_entry(info, &device_domain_list, global) { | |
276dbf99 DW |
1988 | if (info->segment == segment && |
1989 | info->bus == bus && info->devfn == devfn) { | |
ba395927 KA |
1990 | found = info->domain; |
1991 | break; | |
1992 | } | |
1993 | } | |
1994 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
1995 | /* pcie-pci bridge already has a domain, uses it */ | |
1996 | if (found) { | |
1997 | domain = found; | |
1998 | goto found_domain; | |
1999 | } | |
2000 | } | |
2001 | ||
2c2e2c38 FY |
2002 | domain = alloc_domain(); |
2003 | if (!domain) | |
2004 | goto error; | |
2005 | ||
ba395927 KA |
2006 | /* Allocate new domain for the device */ |
2007 | drhd = dmar_find_matched_drhd_unit(pdev); | |
2008 | if (!drhd) { | |
2009 | printk(KERN_ERR "IOMMU: can't find DMAR for device %s\n", | |
2010 | pci_name(pdev)); | |
d2900bd6 | 2011 | free_domain_mem(domain); |
ba395927 KA |
2012 | return NULL; |
2013 | } | |
2014 | iommu = drhd->iommu; | |
2015 | ||
2c2e2c38 FY |
2016 | ret = iommu_attach_domain(domain, iommu); |
2017 | if (ret) { | |
2fe9723d | 2018 | free_domain_mem(domain); |
ba395927 | 2019 | goto error; |
2c2e2c38 | 2020 | } |
ba395927 KA |
2021 | |
2022 | if (domain_init(domain, gaw)) { | |
2023 | domain_exit(domain); | |
2024 | goto error; | |
2025 | } | |
2026 | ||
2027 | /* register pcie-to-pci device */ | |
2028 | if (dev_tmp) { | |
2029 | info = alloc_devinfo_mem(); | |
2030 | if (!info) { | |
2031 | domain_exit(domain); | |
2032 | goto error; | |
2033 | } | |
276dbf99 | 2034 | info->segment = segment; |
ba395927 KA |
2035 | info->bus = bus; |
2036 | info->devfn = devfn; | |
2037 | info->dev = NULL; | |
2038 | info->domain = domain; | |
2039 | /* This domain is shared by devices under p2p bridge */ | |
3b5410e7 | 2040 | domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; |
ba395927 KA |
2041 | |
2042 | /* pcie-to-pci bridge already has a domain, uses it */ | |
2043 | found = NULL; | |
2044 | spin_lock_irqsave(&device_domain_lock, flags); | |
2045 | list_for_each_entry(tmp, &device_domain_list, global) { | |
276dbf99 DW |
2046 | if (tmp->segment == segment && |
2047 | tmp->bus == bus && tmp->devfn == devfn) { | |
ba395927 KA |
2048 | found = tmp->domain; |
2049 | break; | |
2050 | } | |
2051 | } | |
2052 | if (found) { | |
00dfff77 | 2053 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 KA |
2054 | free_devinfo_mem(info); |
2055 | domain_exit(domain); | |
2056 | domain = found; | |
2057 | } else { | |
2058 | list_add(&info->link, &domain->devices); | |
2059 | list_add(&info->global, &device_domain_list); | |
00dfff77 | 2060 | spin_unlock_irqrestore(&device_domain_lock, flags); |
ba395927 | 2061 | } |
ba395927 KA |
2062 | } |
2063 | ||
2064 | found_domain: | |
2065 | info = alloc_devinfo_mem(); | |
2066 | if (!info) | |
2067 | goto error; | |
276dbf99 | 2068 | info->segment = segment; |
ba395927 KA |
2069 | info->bus = pdev->bus->number; |
2070 | info->devfn = pdev->devfn; | |
2071 | info->dev = pdev; | |
2072 | info->domain = domain; | |
2073 | spin_lock_irqsave(&device_domain_lock, flags); | |
2074 | /* somebody is fast */ | |
2075 | found = find_domain(pdev); | |
2076 | if (found != NULL) { | |
2077 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2078 | if (found != domain) { | |
2079 | domain_exit(domain); | |
2080 | domain = found; | |
2081 | } | |
2082 | free_devinfo_mem(info); | |
2083 | return domain; | |
2084 | } | |
2085 | list_add(&info->link, &domain->devices); | |
2086 | list_add(&info->global, &device_domain_list); | |
358dd8ac | 2087 | pdev->dev.archdata.iommu = info; |
ba395927 KA |
2088 | spin_unlock_irqrestore(&device_domain_lock, flags); |
2089 | return domain; | |
2090 | error: | |
2091 | /* recheck it here, maybe others set it */ | |
2092 | return find_domain(pdev); | |
2093 | } | |
2094 | ||
2c2e2c38 | 2095 | static int iommu_identity_mapping; |
e0fc7e0b DW |
2096 | #define IDENTMAP_ALL 1 |
2097 | #define IDENTMAP_GFX 2 | |
2098 | #define IDENTMAP_AZALIA 4 | |
2c2e2c38 | 2099 | |
b213203e DW |
2100 | static int iommu_domain_identity_map(struct dmar_domain *domain, |
2101 | unsigned long long start, | |
2102 | unsigned long long end) | |
ba395927 | 2103 | { |
c5395d5c DW |
2104 | unsigned long first_vpfn = start >> VTD_PAGE_SHIFT; |
2105 | unsigned long last_vpfn = end >> VTD_PAGE_SHIFT; | |
2106 | ||
2107 | if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn), | |
2108 | dma_to_mm_pfn(last_vpfn))) { | |
ba395927 | 2109 | printk(KERN_ERR "IOMMU: reserve iova failed\n"); |
b213203e | 2110 | return -ENOMEM; |
ba395927 KA |
2111 | } |
2112 | ||
c5395d5c DW |
2113 | pr_debug("Mapping reserved region %llx-%llx for domain %d\n", |
2114 | start, end, domain->id); | |
ba395927 KA |
2115 | /* |
2116 | * RMRR range might have overlap with physical memory range, | |
2117 | * clear it first | |
2118 | */ | |
c5395d5c | 2119 | dma_pte_clear_range(domain, first_vpfn, last_vpfn); |
ba395927 | 2120 | |
c5395d5c DW |
2121 | return domain_pfn_mapping(domain, first_vpfn, first_vpfn, |
2122 | last_vpfn - first_vpfn + 1, | |
61df7443 | 2123 | DMA_PTE_READ|DMA_PTE_WRITE); |
b213203e DW |
2124 | } |
2125 | ||
2126 | static int iommu_prepare_identity_map(struct pci_dev *pdev, | |
2127 | unsigned long long start, | |
2128 | unsigned long long end) | |
2129 | { | |
2130 | struct dmar_domain *domain; | |
2131 | int ret; | |
2132 | ||
c7ab48d2 | 2133 | domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH); |
b213203e DW |
2134 | if (!domain) |
2135 | return -ENOMEM; | |
2136 | ||
19943b0e DW |
2137 | /* For _hardware_ passthrough, don't bother. But for software |
2138 | passthrough, we do it anyway -- it may indicate a memory | |
2139 | range which is reserved in E820, so which didn't get set | |
2140 | up to start with in si_domain */ | |
2141 | if (domain == si_domain && hw_pass_through) { | |
2142 | printk("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", | |
2143 | pci_name(pdev), start, end); | |
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | printk(KERN_INFO | |
2148 | "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n", | |
2149 | pci_name(pdev), start, end); | |
2ff729f5 | 2150 | |
5595b528 DW |
2151 | if (end < start) { |
2152 | WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n" | |
2153 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2154 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2155 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2156 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
2157 | ret = -EIO; | |
2158 | goto error; | |
2159 | } | |
2160 | ||
2ff729f5 DW |
2161 | if (end >> agaw_to_width(domain->agaw)) { |
2162 | WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n" | |
2163 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
2164 | agaw_to_width(domain->agaw), | |
2165 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
2166 | dmi_get_system_info(DMI_BIOS_VERSION), | |
2167 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
2168 | ret = -EIO; | |
2169 | goto error; | |
2170 | } | |
19943b0e | 2171 | |
b213203e | 2172 | ret = iommu_domain_identity_map(domain, start, end); |
ba395927 KA |
2173 | if (ret) |
2174 | goto error; | |
2175 | ||
2176 | /* context entry init */ | |
4ed0d3e6 | 2177 | ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
b213203e DW |
2178 | if (ret) |
2179 | goto error; | |
2180 | ||
2181 | return 0; | |
2182 | ||
2183 | error: | |
ba395927 KA |
2184 | domain_exit(domain); |
2185 | return ret; | |
ba395927 KA |
2186 | } |
2187 | ||
2188 | static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, | |
2189 | struct pci_dev *pdev) | |
2190 | { | |
358dd8ac | 2191 | if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) |
ba395927 KA |
2192 | return 0; |
2193 | return iommu_prepare_identity_map(pdev, rmrr->base_address, | |
70e535d1 | 2194 | rmrr->end_address); |
ba395927 KA |
2195 | } |
2196 | ||
d3f13810 | 2197 | #ifdef CONFIG_INTEL_IOMMU_FLOPPY_WA |
49a0429e KA |
2198 | static inline void iommu_prepare_isa(void) |
2199 | { | |
2200 | struct pci_dev *pdev; | |
2201 | int ret; | |
2202 | ||
2203 | pdev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); | |
2204 | if (!pdev) | |
2205 | return; | |
2206 | ||
c7ab48d2 | 2207 | printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n"); |
70e535d1 | 2208 | ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024 - 1); |
49a0429e KA |
2209 | |
2210 | if (ret) | |
c7ab48d2 DW |
2211 | printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; " |
2212 | "floppy might not work\n"); | |
49a0429e KA |
2213 | |
2214 | } | |
2215 | #else | |
2216 | static inline void iommu_prepare_isa(void) | |
2217 | { | |
2218 | return; | |
2219 | } | |
d3f13810 | 2220 | #endif /* !CONFIG_INTEL_IOMMU_FLPY_WA */ |
49a0429e | 2221 | |
2c2e2c38 | 2222 | static int md_domain_init(struct dmar_domain *domain, int guest_width); |
c7ab48d2 | 2223 | |
071e1374 | 2224 | static int __init si_domain_init(int hw) |
2c2e2c38 FY |
2225 | { |
2226 | struct dmar_drhd_unit *drhd; | |
2227 | struct intel_iommu *iommu; | |
c7ab48d2 | 2228 | int nid, ret = 0; |
2c2e2c38 FY |
2229 | |
2230 | si_domain = alloc_domain(); | |
2231 | if (!si_domain) | |
2232 | return -EFAULT; | |
2233 | ||
c7ab48d2 | 2234 | pr_debug("Identity mapping domain is domain %d\n", si_domain->id); |
2c2e2c38 FY |
2235 | |
2236 | for_each_active_iommu(iommu, drhd) { | |
2237 | ret = iommu_attach_domain(si_domain, iommu); | |
2238 | if (ret) { | |
2239 | domain_exit(si_domain); | |
2240 | return -EFAULT; | |
2241 | } | |
2242 | } | |
2243 | ||
2244 | if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { | |
2245 | domain_exit(si_domain); | |
2246 | return -EFAULT; | |
2247 | } | |
2248 | ||
2249 | si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; | |
2250 | ||
19943b0e DW |
2251 | if (hw) |
2252 | return 0; | |
2253 | ||
c7ab48d2 | 2254 | for_each_online_node(nid) { |
5dfe8660 TH |
2255 | unsigned long start_pfn, end_pfn; |
2256 | int i; | |
2257 | ||
2258 | for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) { | |
2259 | ret = iommu_domain_identity_map(si_domain, | |
2260 | PFN_PHYS(start_pfn), PFN_PHYS(end_pfn)); | |
2261 | if (ret) | |
2262 | return ret; | |
2263 | } | |
c7ab48d2 DW |
2264 | } |
2265 | ||
2c2e2c38 FY |
2266 | return 0; |
2267 | } | |
2268 | ||
2269 | static void domain_remove_one_dev_info(struct dmar_domain *domain, | |
2270 | struct pci_dev *pdev); | |
2271 | static int identity_mapping(struct pci_dev *pdev) | |
2272 | { | |
2273 | struct device_domain_info *info; | |
2274 | ||
2275 | if (likely(!iommu_identity_mapping)) | |
2276 | return 0; | |
2277 | ||
cb452a40 MT |
2278 | info = pdev->dev.archdata.iommu; |
2279 | if (info && info != DUMMY_DEVICE_DOMAIN_INFO) | |
2280 | return (info->domain == si_domain); | |
2c2e2c38 | 2281 | |
2c2e2c38 FY |
2282 | return 0; |
2283 | } | |
2284 | ||
2285 | static int domain_add_dev_info(struct dmar_domain *domain, | |
5fe60f4e DW |
2286 | struct pci_dev *pdev, |
2287 | int translation) | |
2c2e2c38 FY |
2288 | { |
2289 | struct device_domain_info *info; | |
2290 | unsigned long flags; | |
5fe60f4e | 2291 | int ret; |
2c2e2c38 FY |
2292 | |
2293 | info = alloc_devinfo_mem(); | |
2294 | if (!info) | |
2295 | return -ENOMEM; | |
2296 | ||
2297 | info->segment = pci_domain_nr(pdev->bus); | |
2298 | info->bus = pdev->bus->number; | |
2299 | info->devfn = pdev->devfn; | |
2300 | info->dev = pdev; | |
2301 | info->domain = domain; | |
2302 | ||
2303 | spin_lock_irqsave(&device_domain_lock, flags); | |
2304 | list_add(&info->link, &domain->devices); | |
2305 | list_add(&info->global, &device_domain_list); | |
2306 | pdev->dev.archdata.iommu = info; | |
2307 | spin_unlock_irqrestore(&device_domain_lock, flags); | |
2308 | ||
e2ad23d0 DW |
2309 | ret = domain_context_mapping(domain, pdev, translation); |
2310 | if (ret) { | |
2311 | spin_lock_irqsave(&device_domain_lock, flags); | |
109b9b04 | 2312 | unlink_domain_info(info); |
e2ad23d0 DW |
2313 | spin_unlock_irqrestore(&device_domain_lock, flags); |
2314 | free_devinfo_mem(info); | |
2315 | return ret; | |
2316 | } | |
2317 | ||
2c2e2c38 FY |
2318 | return 0; |
2319 | } | |
2320 | ||
6941af28 DW |
2321 | static int iommu_should_identity_map(struct pci_dev *pdev, int startup) |
2322 | { | |
e0fc7e0b DW |
2323 | if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) |
2324 | return 1; | |
2325 | ||
2326 | if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) | |
2327 | return 1; | |
2328 | ||
2329 | if (!(iommu_identity_mapping & IDENTMAP_ALL)) | |
2330 | return 0; | |
6941af28 | 2331 | |
3dfc813d DW |
2332 | /* |
2333 | * We want to start off with all devices in the 1:1 domain, and | |
2334 | * take them out later if we find they can't access all of memory. | |
2335 | * | |
2336 | * However, we can't do this for PCI devices behind bridges, | |
2337 | * because all PCI devices behind the same bridge will end up | |
2338 | * with the same source-id on their transactions. | |
2339 | * | |
2340 | * Practically speaking, we can't change things around for these | |
2341 | * devices at run-time, because we can't be sure there'll be no | |
2342 | * DMA transactions in flight for any of their siblings. | |
2343 | * | |
2344 | * So PCI devices (unless they're on the root bus) as well as | |
2345 | * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of | |
2346 | * the 1:1 domain, just in _case_ one of their siblings turns out | |
2347 | * not to be able to map all of memory. | |
2348 | */ | |
5f4d91a1 | 2349 | if (!pci_is_pcie(pdev)) { |
3dfc813d DW |
2350 | if (!pci_is_root_bus(pdev->bus)) |
2351 | return 0; | |
2352 | if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) | |
2353 | return 0; | |
2354 | } else if (pdev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
2355 | return 0; | |
2356 | ||
2357 | /* | |
2358 | * At boot time, we don't yet know if devices will be 64-bit capable. | |
2359 | * Assume that they will -- if they turn out not to be, then we can | |
2360 | * take them out of the 1:1 domain later. | |
2361 | */ | |
8fcc5372 CW |
2362 | if (!startup) { |
2363 | /* | |
2364 | * If the device's dma_mask is less than the system's memory | |
2365 | * size then this is not a candidate for identity mapping. | |
2366 | */ | |
2367 | u64 dma_mask = pdev->dma_mask; | |
2368 | ||
2369 | if (pdev->dev.coherent_dma_mask && | |
2370 | pdev->dev.coherent_dma_mask < dma_mask) | |
2371 | dma_mask = pdev->dev.coherent_dma_mask; | |
2372 | ||
2373 | return dma_mask >= dma_get_required_mask(&pdev->dev); | |
2374 | } | |
6941af28 DW |
2375 | |
2376 | return 1; | |
2377 | } | |
2378 | ||
071e1374 | 2379 | static int __init iommu_prepare_static_identity_mapping(int hw) |
2c2e2c38 | 2380 | { |
2c2e2c38 FY |
2381 | struct pci_dev *pdev = NULL; |
2382 | int ret; | |
2383 | ||
19943b0e | 2384 | ret = si_domain_init(hw); |
2c2e2c38 FY |
2385 | if (ret) |
2386 | return -EFAULT; | |
2387 | ||
2c2e2c38 | 2388 | for_each_pci_dev(pdev) { |
6941af28 | 2389 | if (iommu_should_identity_map(pdev, 1)) { |
5fe60f4e | 2390 | ret = domain_add_dev_info(si_domain, pdev, |
eae460b6 MT |
2391 | hw ? CONTEXT_TT_PASS_THROUGH : |
2392 | CONTEXT_TT_MULTI_LEVEL); | |
2393 | if (ret) { | |
2394 | /* device not associated with an iommu */ | |
2395 | if (ret == -ENODEV) | |
2396 | continue; | |
62edf5dc | 2397 | return ret; |
eae460b6 MT |
2398 | } |
2399 | pr_info("IOMMU: %s identity mapping for device %s\n", | |
2400 | hw ? "hardware" : "software", pci_name(pdev)); | |
62edf5dc | 2401 | } |
2c2e2c38 FY |
2402 | } |
2403 | ||
2404 | return 0; | |
2405 | } | |
2406 | ||
b779260b | 2407 | static int __init init_dmars(void) |
ba395927 KA |
2408 | { |
2409 | struct dmar_drhd_unit *drhd; | |
2410 | struct dmar_rmrr_unit *rmrr; | |
2411 | struct pci_dev *pdev; | |
2412 | struct intel_iommu *iommu; | |
9d783ba0 | 2413 | int i, ret; |
2c2e2c38 | 2414 | |
ba395927 KA |
2415 | /* |
2416 | * for each drhd | |
2417 | * allocate root | |
2418 | * initialize and program root entry to not present | |
2419 | * endfor | |
2420 | */ | |
2421 | for_each_drhd_unit(drhd) { | |
5e0d2a6f | 2422 | /* |
2423 | * lock not needed as this is only incremented in the single | |
2424 | * threaded kernel __init code path all other access are read | |
2425 | * only | |
2426 | */ | |
1b198bb0 MT |
2427 | if (g_num_of_iommus < IOMMU_UNITS_SUPPORTED) { |
2428 | g_num_of_iommus++; | |
2429 | continue; | |
2430 | } | |
2431 | printk_once(KERN_ERR "intel-iommu: exceeded %d IOMMUs\n", | |
2432 | IOMMU_UNITS_SUPPORTED); | |
5e0d2a6f | 2433 | } |
2434 | ||
d9630fe9 WH |
2435 | g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), |
2436 | GFP_KERNEL); | |
2437 | if (!g_iommus) { | |
2438 | printk(KERN_ERR "Allocating global iommu array failed\n"); | |
2439 | ret = -ENOMEM; | |
2440 | goto error; | |
2441 | } | |
2442 | ||
80b20dd8 | 2443 | deferred_flush = kzalloc(g_num_of_iommus * |
2444 | sizeof(struct deferred_flush_tables), GFP_KERNEL); | |
2445 | if (!deferred_flush) { | |
5e0d2a6f | 2446 | ret = -ENOMEM; |
2447 | goto error; | |
2448 | } | |
2449 | ||
5e0d2a6f | 2450 | for_each_drhd_unit(drhd) { |
2451 | if (drhd->ignored) | |
2452 | continue; | |
1886e8a9 SS |
2453 | |
2454 | iommu = drhd->iommu; | |
d9630fe9 | 2455 | g_iommus[iommu->seq_id] = iommu; |
ba395927 | 2456 | |
e61d98d8 SS |
2457 | ret = iommu_init_domains(iommu); |
2458 | if (ret) | |
2459 | goto error; | |
2460 | ||
ba395927 KA |
2461 | /* |
2462 | * TBD: | |
2463 | * we could share the same root & context tables | |
25985edc | 2464 | * among all IOMMU's. Need to Split it later. |
ba395927 KA |
2465 | */ |
2466 | ret = iommu_alloc_root_entry(iommu); | |
2467 | if (ret) { | |
2468 | printk(KERN_ERR "IOMMU: allocate root entry failed\n"); | |
2469 | goto error; | |
2470 | } | |
4ed0d3e6 | 2471 | if (!ecap_pass_through(iommu->ecap)) |
19943b0e | 2472 | hw_pass_through = 0; |
ba395927 KA |
2473 | } |
2474 | ||
1531a6a6 SS |
2475 | /* |
2476 | * Start from the sane iommu hardware state. | |
2477 | */ | |
a77b67d4 YS |
2478 | for_each_drhd_unit(drhd) { |
2479 | if (drhd->ignored) | |
2480 | continue; | |
2481 | ||
2482 | iommu = drhd->iommu; | |
1531a6a6 SS |
2483 | |
2484 | /* | |
2485 | * If the queued invalidation is already initialized by us | |
2486 | * (for example, while enabling interrupt-remapping) then | |
2487 | * we got the things already rolling from a sane state. | |
2488 | */ | |
2489 | if (iommu->qi) | |
2490 | continue; | |
2491 | ||
2492 | /* | |
2493 | * Clear any previous faults. | |
2494 | */ | |
2495 | dmar_fault(-1, iommu); | |
2496 | /* | |
2497 | * Disable queued invalidation if supported and already enabled | |
2498 | * before OS handover. | |
2499 | */ | |
2500 | dmar_disable_qi(iommu); | |
2501 | } | |
2502 | ||
2503 | for_each_drhd_unit(drhd) { | |
2504 | if (drhd->ignored) | |
2505 | continue; | |
2506 | ||
2507 | iommu = drhd->iommu; | |
2508 | ||
a77b67d4 YS |
2509 | if (dmar_enable_qi(iommu)) { |
2510 | /* | |
2511 | * Queued Invalidate not enabled, use Register Based | |
2512 | * Invalidate | |
2513 | */ | |
2514 | iommu->flush.flush_context = __iommu_flush_context; | |
2515 | iommu->flush.flush_iotlb = __iommu_flush_iotlb; | |
680a7524 | 2516 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Register based " |
b4e0f9eb | 2517 | "invalidation\n", |
680a7524 | 2518 | iommu->seq_id, |
b4e0f9eb | 2519 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2520 | } else { |
2521 | iommu->flush.flush_context = qi_flush_context; | |
2522 | iommu->flush.flush_iotlb = qi_flush_iotlb; | |
680a7524 | 2523 | printk(KERN_INFO "IOMMU %d 0x%Lx: using Queued " |
b4e0f9eb | 2524 | "invalidation\n", |
680a7524 | 2525 | iommu->seq_id, |
b4e0f9eb | 2526 | (unsigned long long)drhd->reg_base_addr); |
a77b67d4 YS |
2527 | } |
2528 | } | |
2529 | ||
19943b0e | 2530 | if (iommu_pass_through) |
e0fc7e0b DW |
2531 | iommu_identity_mapping |= IDENTMAP_ALL; |
2532 | ||
d3f13810 | 2533 | #ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA |
e0fc7e0b | 2534 | iommu_identity_mapping |= IDENTMAP_GFX; |
19943b0e | 2535 | #endif |
e0fc7e0b DW |
2536 | |
2537 | check_tylersburg_isoch(); | |
2538 | ||
ba395927 | 2539 | /* |
19943b0e DW |
2540 | * If pass through is not set or not enabled, setup context entries for |
2541 | * identity mappings for rmrr, gfx, and isa and may fall back to static | |
2542 | * identity mapping if iommu_identity_mapping is set. | |
ba395927 | 2543 | */ |
19943b0e DW |
2544 | if (iommu_identity_mapping) { |
2545 | ret = iommu_prepare_static_identity_mapping(hw_pass_through); | |
4ed0d3e6 | 2546 | if (ret) { |
19943b0e DW |
2547 | printk(KERN_CRIT "Failed to setup IOMMU pass-through\n"); |
2548 | goto error; | |
ba395927 KA |
2549 | } |
2550 | } | |
ba395927 | 2551 | /* |
19943b0e DW |
2552 | * For each rmrr |
2553 | * for each dev attached to rmrr | |
2554 | * do | |
2555 | * locate drhd for dev, alloc domain for dev | |
2556 | * allocate free domain | |
2557 | * allocate page table entries for rmrr | |
2558 | * if context not allocated for bus | |
2559 | * allocate and init context | |
2560 | * set present in root table for this bus | |
2561 | * init context with domain, translation etc | |
2562 | * endfor | |
2563 | * endfor | |
ba395927 | 2564 | */ |
19943b0e DW |
2565 | printk(KERN_INFO "IOMMU: Setting RMRR:\n"); |
2566 | for_each_rmrr_units(rmrr) { | |
2567 | for (i = 0; i < rmrr->devices_cnt; i++) { | |
2568 | pdev = rmrr->devices[i]; | |
2569 | /* | |
2570 | * some BIOS lists non-exist devices in DMAR | |
2571 | * table. | |
2572 | */ | |
2573 | if (!pdev) | |
2574 | continue; | |
2575 | ret = iommu_prepare_rmrr_dev(rmrr, pdev); | |
2576 | if (ret) | |
2577 | printk(KERN_ERR | |
2578 | "IOMMU: mapping reserved region failed\n"); | |
ba395927 | 2579 | } |
4ed0d3e6 | 2580 | } |
49a0429e | 2581 | |
19943b0e DW |
2582 | iommu_prepare_isa(); |
2583 | ||
ba395927 KA |
2584 | /* |
2585 | * for each drhd | |
2586 | * enable fault log | |
2587 | * global invalidate context cache | |
2588 | * global invalidate iotlb | |
2589 | * enable translation | |
2590 | */ | |
2591 | for_each_drhd_unit(drhd) { | |
51a63e67 JC |
2592 | if (drhd->ignored) { |
2593 | /* | |
2594 | * we always have to disable PMRs or DMA may fail on | |
2595 | * this device | |
2596 | */ | |
2597 | if (force_on) | |
2598 | iommu_disable_protect_mem_regions(drhd->iommu); | |
ba395927 | 2599 | continue; |
51a63e67 | 2600 | } |
ba395927 | 2601 | iommu = drhd->iommu; |
ba395927 KA |
2602 | |
2603 | iommu_flush_write_buffer(iommu); | |
2604 | ||
3460a6d9 KA |
2605 | ret = dmar_set_interrupt(iommu); |
2606 | if (ret) | |
2607 | goto error; | |
2608 | ||
ba395927 KA |
2609 | iommu_set_root_entry(iommu); |
2610 | ||
4c25a2c1 | 2611 | iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); |
1f0ef2aa | 2612 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); |
f8bab735 | 2613 | |
ba395927 KA |
2614 | ret = iommu_enable_translation(iommu); |
2615 | if (ret) | |
2616 | goto error; | |
b94996c9 DW |
2617 | |
2618 | iommu_disable_protect_mem_regions(iommu); | |
ba395927 KA |
2619 | } |
2620 | ||
2621 | return 0; | |
2622 | error: | |
2623 | for_each_drhd_unit(drhd) { | |
2624 | if (drhd->ignored) | |
2625 | continue; | |
2626 | iommu = drhd->iommu; | |
2627 | free_iommu(iommu); | |
2628 | } | |
d9630fe9 | 2629 | kfree(g_iommus); |
ba395927 KA |
2630 | return ret; |
2631 | } | |
2632 | ||
5a5e02a6 | 2633 | /* This takes a number of _MM_ pages, not VTD pages */ |
875764de DW |
2634 | static struct iova *intel_alloc_iova(struct device *dev, |
2635 | struct dmar_domain *domain, | |
2636 | unsigned long nrpages, uint64_t dma_mask) | |
ba395927 | 2637 | { |
ba395927 | 2638 | struct pci_dev *pdev = to_pci_dev(dev); |
ba395927 | 2639 | struct iova *iova = NULL; |
ba395927 | 2640 | |
875764de DW |
2641 | /* Restrict dma_mask to the width that the iommu can handle */ |
2642 | dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask); | |
2643 | ||
2644 | if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) { | |
ba395927 KA |
2645 | /* |
2646 | * First try to allocate an io virtual address in | |
284901a9 | 2647 | * DMA_BIT_MASK(32) and if that fails then try allocating |
3609801e | 2648 | * from higher range |
ba395927 | 2649 | */ |
875764de DW |
2650 | iova = alloc_iova(&domain->iovad, nrpages, |
2651 | IOVA_PFN(DMA_BIT_MASK(32)), 1); | |
2652 | if (iova) | |
2653 | return iova; | |
2654 | } | |
2655 | iova = alloc_iova(&domain->iovad, nrpages, IOVA_PFN(dma_mask), 1); | |
2656 | if (unlikely(!iova)) { | |
2657 | printk(KERN_ERR "Allocating %ld-page iova for %s failed", | |
2658 | nrpages, pci_name(pdev)); | |
f76aec76 KA |
2659 | return NULL; |
2660 | } | |
2661 | ||
2662 | return iova; | |
2663 | } | |
2664 | ||
147202aa | 2665 | static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) |
f76aec76 KA |
2666 | { |
2667 | struct dmar_domain *domain; | |
2668 | int ret; | |
2669 | ||
2670 | domain = get_domain_for_dev(pdev, | |
2671 | DEFAULT_DOMAIN_ADDRESS_WIDTH); | |
2672 | if (!domain) { | |
2673 | printk(KERN_ERR | |
2674 | "Allocating domain for %s failed", pci_name(pdev)); | |
4fe05bbc | 2675 | return NULL; |
ba395927 KA |
2676 | } |
2677 | ||
2678 | /* make sure context mapping is ok */ | |
5331fe6f | 2679 | if (unlikely(!domain_context_mapped(pdev))) { |
4ed0d3e6 FY |
2680 | ret = domain_context_mapping(domain, pdev, |
2681 | CONTEXT_TT_MULTI_LEVEL); | |
f76aec76 KA |
2682 | if (ret) { |
2683 | printk(KERN_ERR | |
2684 | "Domain context map for %s failed", | |
2685 | pci_name(pdev)); | |
4fe05bbc | 2686 | return NULL; |
f76aec76 | 2687 | } |
ba395927 KA |
2688 | } |
2689 | ||
f76aec76 KA |
2690 | return domain; |
2691 | } | |
2692 | ||
147202aa DW |
2693 | static inline struct dmar_domain *get_valid_domain_for_dev(struct pci_dev *dev) |
2694 | { | |
2695 | struct device_domain_info *info; | |
2696 | ||
2697 | /* No lock here, assumes no domain exit in normal case */ | |
2698 | info = dev->dev.archdata.iommu; | |
2699 | if (likely(info)) | |
2700 | return info->domain; | |
2701 | ||
2702 | return __get_valid_domain_for_dev(dev); | |
2703 | } | |
2704 | ||
2c2e2c38 FY |
2705 | static int iommu_dummy(struct pci_dev *pdev) |
2706 | { | |
2707 | return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; | |
2708 | } | |
2709 | ||
2710 | /* Check if the pdev needs to go through non-identity map and unmap process.*/ | |
73676832 | 2711 | static int iommu_no_mapping(struct device *dev) |
2c2e2c38 | 2712 | { |
73676832 | 2713 | struct pci_dev *pdev; |
2c2e2c38 FY |
2714 | int found; |
2715 | ||
73676832 DW |
2716 | if (unlikely(dev->bus != &pci_bus_type)) |
2717 | return 1; | |
2718 | ||
2719 | pdev = to_pci_dev(dev); | |
1e4c64c4 DW |
2720 | if (iommu_dummy(pdev)) |
2721 | return 1; | |
2722 | ||
2c2e2c38 | 2723 | if (!iommu_identity_mapping) |
1e4c64c4 | 2724 | return 0; |
2c2e2c38 FY |
2725 | |
2726 | found = identity_mapping(pdev); | |
2727 | if (found) { | |
6941af28 | 2728 | if (iommu_should_identity_map(pdev, 0)) |
2c2e2c38 FY |
2729 | return 1; |
2730 | else { | |
2731 | /* | |
2732 | * 32 bit DMA is removed from si_domain and fall back | |
2733 | * to non-identity mapping. | |
2734 | */ | |
2735 | domain_remove_one_dev_info(si_domain, pdev); | |
2736 | printk(KERN_INFO "32bit %s uses non-identity mapping\n", | |
2737 | pci_name(pdev)); | |
2738 | return 0; | |
2739 | } | |
2740 | } else { | |
2741 | /* | |
2742 | * In case of a detached 64 bit DMA device from vm, the device | |
2743 | * is put into si_domain for identity mapping. | |
2744 | */ | |
6941af28 | 2745 | if (iommu_should_identity_map(pdev, 0)) { |
2c2e2c38 | 2746 | int ret; |
5fe60f4e DW |
2747 | ret = domain_add_dev_info(si_domain, pdev, |
2748 | hw_pass_through ? | |
2749 | CONTEXT_TT_PASS_THROUGH : | |
2750 | CONTEXT_TT_MULTI_LEVEL); | |
2c2e2c38 FY |
2751 | if (!ret) { |
2752 | printk(KERN_INFO "64bit %s uses identity mapping\n", | |
2753 | pci_name(pdev)); | |
2754 | return 1; | |
2755 | } | |
2756 | } | |
2757 | } | |
2758 | ||
1e4c64c4 | 2759 | return 0; |
2c2e2c38 FY |
2760 | } |
2761 | ||
bb9e6d65 FT |
2762 | static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, |
2763 | size_t size, int dir, u64 dma_mask) | |
f76aec76 KA |
2764 | { |
2765 | struct pci_dev *pdev = to_pci_dev(hwdev); | |
f76aec76 | 2766 | struct dmar_domain *domain; |
5b6985ce | 2767 | phys_addr_t start_paddr; |
f76aec76 KA |
2768 | struct iova *iova; |
2769 | int prot = 0; | |
6865f0d1 | 2770 | int ret; |
8c11e798 | 2771 | struct intel_iommu *iommu; |
33041ec0 | 2772 | unsigned long paddr_pfn = paddr >> PAGE_SHIFT; |
f76aec76 KA |
2773 | |
2774 | BUG_ON(dir == DMA_NONE); | |
2c2e2c38 | 2775 | |
73676832 | 2776 | if (iommu_no_mapping(hwdev)) |
6865f0d1 | 2777 | return paddr; |
f76aec76 KA |
2778 | |
2779 | domain = get_valid_domain_for_dev(pdev); | |
2780 | if (!domain) | |
2781 | return 0; | |
2782 | ||
8c11e798 | 2783 | iommu = domain_get_iommu(domain); |
88cb6a74 | 2784 | size = aligned_nrpages(paddr, size); |
f76aec76 | 2785 | |
c681d0ba | 2786 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), dma_mask); |
f76aec76 KA |
2787 | if (!iova) |
2788 | goto error; | |
2789 | ||
ba395927 KA |
2790 | /* |
2791 | * Check if DMAR supports zero-length reads on write only | |
2792 | * mappings.. | |
2793 | */ | |
2794 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 2795 | !cap_zlr(iommu->cap)) |
ba395927 KA |
2796 | prot |= DMA_PTE_READ; |
2797 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
2798 | prot |= DMA_PTE_WRITE; | |
2799 | /* | |
6865f0d1 | 2800 | * paddr - (paddr + size) might be partial page, we should map the whole |
ba395927 | 2801 | * page. Note: if two part of one page are separately mapped, we |
6865f0d1 | 2802 | * might have two guest_addr mapping to the same host paddr, but this |
ba395927 KA |
2803 | * is not a big problem |
2804 | */ | |
0ab36de2 | 2805 | ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo), |
33041ec0 | 2806 | mm_to_dma_pfn(paddr_pfn), size, prot); |
ba395927 KA |
2807 | if (ret) |
2808 | goto error; | |
2809 | ||
1f0ef2aa DW |
2810 | /* it's a non-present to present mapping. Only flush if caching mode */ |
2811 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 2812 | iommu_flush_iotlb_psi(iommu, domain->id, mm_to_dma_pfn(iova->pfn_lo), size, 1); |
1f0ef2aa | 2813 | else |
8c11e798 | 2814 | iommu_flush_write_buffer(iommu); |
f76aec76 | 2815 | |
03d6a246 DW |
2816 | start_paddr = (phys_addr_t)iova->pfn_lo << PAGE_SHIFT; |
2817 | start_paddr += paddr & ~PAGE_MASK; | |
2818 | return start_paddr; | |
ba395927 | 2819 | |
ba395927 | 2820 | error: |
f76aec76 KA |
2821 | if (iova) |
2822 | __free_iova(&domain->iovad, iova); | |
4cf2e75d | 2823 | printk(KERN_ERR"Device %s request: %zx@%llx dir %d --- failed\n", |
5b6985ce | 2824 | pci_name(pdev), size, (unsigned long long)paddr, dir); |
ba395927 KA |
2825 | return 0; |
2826 | } | |
2827 | ||
ffbbef5c FT |
2828 | static dma_addr_t intel_map_page(struct device *dev, struct page *page, |
2829 | unsigned long offset, size_t size, | |
2830 | enum dma_data_direction dir, | |
2831 | struct dma_attrs *attrs) | |
bb9e6d65 | 2832 | { |
ffbbef5c FT |
2833 | return __intel_map_single(dev, page_to_phys(page) + offset, size, |
2834 | dir, to_pci_dev(dev)->dma_mask); | |
bb9e6d65 FT |
2835 | } |
2836 | ||
5e0d2a6f | 2837 | static void flush_unmaps(void) |
2838 | { | |
80b20dd8 | 2839 | int i, j; |
5e0d2a6f | 2840 | |
5e0d2a6f | 2841 | timer_on = 0; |
2842 | ||
2843 | /* just flush them all */ | |
2844 | for (i = 0; i < g_num_of_iommus; i++) { | |
a2bb8459 WH |
2845 | struct intel_iommu *iommu = g_iommus[i]; |
2846 | if (!iommu) | |
2847 | continue; | |
c42d9f32 | 2848 | |
9dd2fe89 YZ |
2849 | if (!deferred_flush[i].next) |
2850 | continue; | |
2851 | ||
78d5f0f5 NA |
2852 | /* In caching mode, global flushes turn emulation expensive */ |
2853 | if (!cap_caching_mode(iommu->cap)) | |
2854 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, | |
93a23a72 | 2855 | DMA_TLB_GLOBAL_FLUSH); |
9dd2fe89 | 2856 | for (j = 0; j < deferred_flush[i].next; j++) { |
93a23a72 YZ |
2857 | unsigned long mask; |
2858 | struct iova *iova = deferred_flush[i].iova[j]; | |
78d5f0f5 NA |
2859 | struct dmar_domain *domain = deferred_flush[i].domain[j]; |
2860 | ||
2861 | /* On real hardware multiple invalidations are expensive */ | |
2862 | if (cap_caching_mode(iommu->cap)) | |
2863 | iommu_flush_iotlb_psi(iommu, domain->id, | |
2864 | iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1, 0); | |
2865 | else { | |
2866 | mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1)); | |
2867 | iommu_flush_dev_iotlb(deferred_flush[i].domain[j], | |
2868 | (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); | |
2869 | } | |
93a23a72 | 2870 | __free_iova(&deferred_flush[i].domain[j]->iovad, iova); |
80b20dd8 | 2871 | } |
9dd2fe89 | 2872 | deferred_flush[i].next = 0; |
5e0d2a6f | 2873 | } |
2874 | ||
5e0d2a6f | 2875 | list_size = 0; |
5e0d2a6f | 2876 | } |
2877 | ||
2878 | static void flush_unmaps_timeout(unsigned long data) | |
2879 | { | |
80b20dd8 | 2880 | unsigned long flags; |
2881 | ||
2882 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
5e0d2a6f | 2883 | flush_unmaps(); |
80b20dd8 | 2884 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); |
5e0d2a6f | 2885 | } |
2886 | ||
2887 | static void add_unmap(struct dmar_domain *dom, struct iova *iova) | |
2888 | { | |
2889 | unsigned long flags; | |
80b20dd8 | 2890 | int next, iommu_id; |
8c11e798 | 2891 | struct intel_iommu *iommu; |
5e0d2a6f | 2892 | |
2893 | spin_lock_irqsave(&async_umap_flush_lock, flags); | |
80b20dd8 | 2894 | if (list_size == HIGH_WATER_MARK) |
2895 | flush_unmaps(); | |
2896 | ||
8c11e798 WH |
2897 | iommu = domain_get_iommu(dom); |
2898 | iommu_id = iommu->seq_id; | |
c42d9f32 | 2899 | |
80b20dd8 | 2900 | next = deferred_flush[iommu_id].next; |
2901 | deferred_flush[iommu_id].domain[next] = dom; | |
2902 | deferred_flush[iommu_id].iova[next] = iova; | |
2903 | deferred_flush[iommu_id].next++; | |
5e0d2a6f | 2904 | |
2905 | if (!timer_on) { | |
2906 | mod_timer(&unmap_timer, jiffies + msecs_to_jiffies(10)); | |
2907 | timer_on = 1; | |
2908 | } | |
2909 | list_size++; | |
2910 | spin_unlock_irqrestore(&async_umap_flush_lock, flags); | |
2911 | } | |
2912 | ||
ffbbef5c FT |
2913 | static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, |
2914 | size_t size, enum dma_data_direction dir, | |
2915 | struct dma_attrs *attrs) | |
ba395927 | 2916 | { |
ba395927 | 2917 | struct pci_dev *pdev = to_pci_dev(dev); |
f76aec76 | 2918 | struct dmar_domain *domain; |
d794dc9b | 2919 | unsigned long start_pfn, last_pfn; |
ba395927 | 2920 | struct iova *iova; |
8c11e798 | 2921 | struct intel_iommu *iommu; |
ba395927 | 2922 | |
73676832 | 2923 | if (iommu_no_mapping(dev)) |
f76aec76 | 2924 | return; |
2c2e2c38 | 2925 | |
ba395927 KA |
2926 | domain = find_domain(pdev); |
2927 | BUG_ON(!domain); | |
2928 | ||
8c11e798 WH |
2929 | iommu = domain_get_iommu(domain); |
2930 | ||
ba395927 | 2931 | iova = find_iova(&domain->iovad, IOVA_PFN(dev_addr)); |
85b98276 DW |
2932 | if (WARN_ONCE(!iova, "Driver unmaps unmatched page at PFN %llx\n", |
2933 | (unsigned long long)dev_addr)) | |
ba395927 | 2934 | return; |
ba395927 | 2935 | |
d794dc9b DW |
2936 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
2937 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
ba395927 | 2938 | |
d794dc9b DW |
2939 | pr_debug("Device %s unmapping: pfn %lx-%lx\n", |
2940 | pci_name(pdev), start_pfn, last_pfn); | |
ba395927 | 2941 | |
f76aec76 | 2942 | /* clear the whole page */ |
d794dc9b DW |
2943 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
2944 | ||
f76aec76 | 2945 | /* free page tables */ |
d794dc9b DW |
2946 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
2947 | ||
5e0d2a6f | 2948 | if (intel_iommu_strict) { |
03d6a246 | 2949 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, |
82653633 | 2950 | last_pfn - start_pfn + 1, 0); |
5e0d2a6f | 2951 | /* free iova */ |
2952 | __free_iova(&domain->iovad, iova); | |
2953 | } else { | |
2954 | add_unmap(domain, iova); | |
2955 | /* | |
2956 | * queue up the release of the unmap to save the 1/6th of the | |
2957 | * cpu used up by the iotlb flush operation... | |
2958 | */ | |
5e0d2a6f | 2959 | } |
ba395927 KA |
2960 | } |
2961 | ||
d7ab5c46 | 2962 | static void *intel_alloc_coherent(struct device *hwdev, size_t size, |
baa676fc AP |
2963 | dma_addr_t *dma_handle, gfp_t flags, |
2964 | struct dma_attrs *attrs) | |
ba395927 KA |
2965 | { |
2966 | void *vaddr; | |
2967 | int order; | |
2968 | ||
5b6985ce | 2969 | size = PAGE_ALIGN(size); |
ba395927 | 2970 | order = get_order(size); |
e8bb910d AW |
2971 | |
2972 | if (!iommu_no_mapping(hwdev)) | |
2973 | flags &= ~(GFP_DMA | GFP_DMA32); | |
2974 | else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) { | |
2975 | if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32)) | |
2976 | flags |= GFP_DMA; | |
2977 | else | |
2978 | flags |= GFP_DMA32; | |
2979 | } | |
ba395927 KA |
2980 | |
2981 | vaddr = (void *)__get_free_pages(flags, order); | |
2982 | if (!vaddr) | |
2983 | return NULL; | |
2984 | memset(vaddr, 0, size); | |
2985 | ||
bb9e6d65 FT |
2986 | *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size, |
2987 | DMA_BIDIRECTIONAL, | |
2988 | hwdev->coherent_dma_mask); | |
ba395927 KA |
2989 | if (*dma_handle) |
2990 | return vaddr; | |
2991 | free_pages((unsigned long)vaddr, order); | |
2992 | return NULL; | |
2993 | } | |
2994 | ||
d7ab5c46 | 2995 | static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr, |
baa676fc | 2996 | dma_addr_t dma_handle, struct dma_attrs *attrs) |
ba395927 KA |
2997 | { |
2998 | int order; | |
2999 | ||
5b6985ce | 3000 | size = PAGE_ALIGN(size); |
ba395927 KA |
3001 | order = get_order(size); |
3002 | ||
0db9b7ae | 3003 | intel_unmap_page(hwdev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); |
ba395927 KA |
3004 | free_pages((unsigned long)vaddr, order); |
3005 | } | |
3006 | ||
d7ab5c46 FT |
3007 | static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, |
3008 | int nelems, enum dma_data_direction dir, | |
3009 | struct dma_attrs *attrs) | |
ba395927 | 3010 | { |
ba395927 KA |
3011 | struct pci_dev *pdev = to_pci_dev(hwdev); |
3012 | struct dmar_domain *domain; | |
d794dc9b | 3013 | unsigned long start_pfn, last_pfn; |
f76aec76 | 3014 | struct iova *iova; |
8c11e798 | 3015 | struct intel_iommu *iommu; |
ba395927 | 3016 | |
73676832 | 3017 | if (iommu_no_mapping(hwdev)) |
ba395927 KA |
3018 | return; |
3019 | ||
3020 | domain = find_domain(pdev); | |
8c11e798 WH |
3021 | BUG_ON(!domain); |
3022 | ||
3023 | iommu = domain_get_iommu(domain); | |
ba395927 | 3024 | |
c03ab37c | 3025 | iova = find_iova(&domain->iovad, IOVA_PFN(sglist[0].dma_address)); |
85b98276 DW |
3026 | if (WARN_ONCE(!iova, "Driver unmaps unmatched sglist at PFN %llx\n", |
3027 | (unsigned long long)sglist[0].dma_address)) | |
f76aec76 | 3028 | return; |
f76aec76 | 3029 | |
d794dc9b DW |
3030 | start_pfn = mm_to_dma_pfn(iova->pfn_lo); |
3031 | last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; | |
f76aec76 KA |
3032 | |
3033 | /* clear the whole page */ | |
d794dc9b DW |
3034 | dma_pte_clear_range(domain, start_pfn, last_pfn); |
3035 | ||
f76aec76 | 3036 | /* free page tables */ |
d794dc9b | 3037 | dma_pte_free_pagetable(domain, start_pfn, last_pfn); |
f76aec76 | 3038 | |
acea0018 DW |
3039 | if (intel_iommu_strict) { |
3040 | iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, | |
82653633 | 3041 | last_pfn - start_pfn + 1, 0); |
acea0018 DW |
3042 | /* free iova */ |
3043 | __free_iova(&domain->iovad, iova); | |
3044 | } else { | |
3045 | add_unmap(domain, iova); | |
3046 | /* | |
3047 | * queue up the release of the unmap to save the 1/6th of the | |
3048 | * cpu used up by the iotlb flush operation... | |
3049 | */ | |
3050 | } | |
ba395927 KA |
3051 | } |
3052 | ||
ba395927 | 3053 | static int intel_nontranslate_map_sg(struct device *hddev, |
c03ab37c | 3054 | struct scatterlist *sglist, int nelems, int dir) |
ba395927 KA |
3055 | { |
3056 | int i; | |
c03ab37c | 3057 | struct scatterlist *sg; |
ba395927 | 3058 | |
c03ab37c | 3059 | for_each_sg(sglist, sg, nelems, i) { |
12d4d40e | 3060 | BUG_ON(!sg_page(sg)); |
4cf2e75d | 3061 | sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset; |
c03ab37c | 3062 | sg->dma_length = sg->length; |
ba395927 KA |
3063 | } |
3064 | return nelems; | |
3065 | } | |
3066 | ||
d7ab5c46 FT |
3067 | static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems, |
3068 | enum dma_data_direction dir, struct dma_attrs *attrs) | |
ba395927 | 3069 | { |
ba395927 | 3070 | int i; |
ba395927 KA |
3071 | struct pci_dev *pdev = to_pci_dev(hwdev); |
3072 | struct dmar_domain *domain; | |
f76aec76 KA |
3073 | size_t size = 0; |
3074 | int prot = 0; | |
f76aec76 KA |
3075 | struct iova *iova = NULL; |
3076 | int ret; | |
c03ab37c | 3077 | struct scatterlist *sg; |
b536d24d | 3078 | unsigned long start_vpfn; |
8c11e798 | 3079 | struct intel_iommu *iommu; |
ba395927 KA |
3080 | |
3081 | BUG_ON(dir == DMA_NONE); | |
73676832 | 3082 | if (iommu_no_mapping(hwdev)) |
c03ab37c | 3083 | return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir); |
ba395927 | 3084 | |
f76aec76 KA |
3085 | domain = get_valid_domain_for_dev(pdev); |
3086 | if (!domain) | |
3087 | return 0; | |
3088 | ||
8c11e798 WH |
3089 | iommu = domain_get_iommu(domain); |
3090 | ||
b536d24d | 3091 | for_each_sg(sglist, sg, nelems, i) |
88cb6a74 | 3092 | size += aligned_nrpages(sg->offset, sg->length); |
f76aec76 | 3093 | |
5a5e02a6 DW |
3094 | iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), |
3095 | pdev->dma_mask); | |
f76aec76 | 3096 | if (!iova) { |
c03ab37c | 3097 | sglist->dma_length = 0; |
f76aec76 KA |
3098 | return 0; |
3099 | } | |
3100 | ||
3101 | /* | |
3102 | * Check if DMAR supports zero-length reads on write only | |
3103 | * mappings.. | |
3104 | */ | |
3105 | if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL || \ | |
8c11e798 | 3106 | !cap_zlr(iommu->cap)) |
f76aec76 KA |
3107 | prot |= DMA_PTE_READ; |
3108 | if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) | |
3109 | prot |= DMA_PTE_WRITE; | |
3110 | ||
b536d24d | 3111 | start_vpfn = mm_to_dma_pfn(iova->pfn_lo); |
e1605495 | 3112 | |
f532959b | 3113 | ret = domain_sg_mapping(domain, start_vpfn, sglist, size, prot); |
e1605495 DW |
3114 | if (unlikely(ret)) { |
3115 | /* clear the page */ | |
3116 | dma_pte_clear_range(domain, start_vpfn, | |
3117 | start_vpfn + size - 1); | |
3118 | /* free page tables */ | |
3119 | dma_pte_free_pagetable(domain, start_vpfn, | |
3120 | start_vpfn + size - 1); | |
3121 | /* free iova */ | |
3122 | __free_iova(&domain->iovad, iova); | |
3123 | return 0; | |
ba395927 KA |
3124 | } |
3125 | ||
1f0ef2aa DW |
3126 | /* it's a non-present to present mapping. Only flush if caching mode */ |
3127 | if (cap_caching_mode(iommu->cap)) | |
82653633 | 3128 | iommu_flush_iotlb_psi(iommu, domain->id, start_vpfn, size, 1); |
1f0ef2aa | 3129 | else |
8c11e798 | 3130 | iommu_flush_write_buffer(iommu); |
1f0ef2aa | 3131 | |
ba395927 KA |
3132 | return nelems; |
3133 | } | |
3134 | ||
dfb805e8 FT |
3135 | static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) |
3136 | { | |
3137 | return !dma_addr; | |
3138 | } | |
3139 | ||
160c1d8e | 3140 | struct dma_map_ops intel_dma_ops = { |
baa676fc AP |
3141 | .alloc = intel_alloc_coherent, |
3142 | .free = intel_free_coherent, | |
ba395927 KA |
3143 | .map_sg = intel_map_sg, |
3144 | .unmap_sg = intel_unmap_sg, | |
ffbbef5c FT |
3145 | .map_page = intel_map_page, |
3146 | .unmap_page = intel_unmap_page, | |
dfb805e8 | 3147 | .mapping_error = intel_mapping_error, |
ba395927 KA |
3148 | }; |
3149 | ||
3150 | static inline int iommu_domain_cache_init(void) | |
3151 | { | |
3152 | int ret = 0; | |
3153 | ||
3154 | iommu_domain_cache = kmem_cache_create("iommu_domain", | |
3155 | sizeof(struct dmar_domain), | |
3156 | 0, | |
3157 | SLAB_HWCACHE_ALIGN, | |
3158 | ||
3159 | NULL); | |
3160 | if (!iommu_domain_cache) { | |
3161 | printk(KERN_ERR "Couldn't create iommu_domain cache\n"); | |
3162 | ret = -ENOMEM; | |
3163 | } | |
3164 | ||
3165 | return ret; | |
3166 | } | |
3167 | ||
3168 | static inline int iommu_devinfo_cache_init(void) | |
3169 | { | |
3170 | int ret = 0; | |
3171 | ||
3172 | iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", | |
3173 | sizeof(struct device_domain_info), | |
3174 | 0, | |
3175 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
3176 | NULL); |
3177 | if (!iommu_devinfo_cache) { | |
3178 | printk(KERN_ERR "Couldn't create devinfo cache\n"); | |
3179 | ret = -ENOMEM; | |
3180 | } | |
3181 | ||
3182 | return ret; | |
3183 | } | |
3184 | ||
3185 | static inline int iommu_iova_cache_init(void) | |
3186 | { | |
3187 | int ret = 0; | |
3188 | ||
3189 | iommu_iova_cache = kmem_cache_create("iommu_iova", | |
3190 | sizeof(struct iova), | |
3191 | 0, | |
3192 | SLAB_HWCACHE_ALIGN, | |
ba395927 KA |
3193 | NULL); |
3194 | if (!iommu_iova_cache) { | |
3195 | printk(KERN_ERR "Couldn't create iova cache\n"); | |
3196 | ret = -ENOMEM; | |
3197 | } | |
3198 | ||
3199 | return ret; | |
3200 | } | |
3201 | ||
3202 | static int __init iommu_init_mempool(void) | |
3203 | { | |
3204 | int ret; | |
3205 | ret = iommu_iova_cache_init(); | |
3206 | if (ret) | |
3207 | return ret; | |
3208 | ||
3209 | ret = iommu_domain_cache_init(); | |
3210 | if (ret) | |
3211 | goto domain_error; | |
3212 | ||
3213 | ret = iommu_devinfo_cache_init(); | |
3214 | if (!ret) | |
3215 | return ret; | |
3216 | ||
3217 | kmem_cache_destroy(iommu_domain_cache); | |
3218 | domain_error: | |
3219 | kmem_cache_destroy(iommu_iova_cache); | |
3220 | ||
3221 | return -ENOMEM; | |
3222 | } | |
3223 | ||
3224 | static void __init iommu_exit_mempool(void) | |
3225 | { | |
3226 | kmem_cache_destroy(iommu_devinfo_cache); | |
3227 | kmem_cache_destroy(iommu_domain_cache); | |
3228 | kmem_cache_destroy(iommu_iova_cache); | |
3229 | ||
3230 | } | |
3231 | ||
556ab45f DW |
3232 | static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) |
3233 | { | |
3234 | struct dmar_drhd_unit *drhd; | |
3235 | u32 vtbar; | |
3236 | int rc; | |
3237 | ||
3238 | /* We know that this device on this chipset has its own IOMMU. | |
3239 | * If we find it under a different IOMMU, then the BIOS is lying | |
3240 | * to us. Hope that the IOMMU for this device is actually | |
3241 | * disabled, and it needs no translation... | |
3242 | */ | |
3243 | rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar); | |
3244 | if (rc) { | |
3245 | /* "can't" happen */ | |
3246 | dev_info(&pdev->dev, "failed to run vt-d quirk\n"); | |
3247 | return; | |
3248 | } | |
3249 | vtbar &= 0xffff0000; | |
3250 | ||
3251 | /* we know that the this iommu should be at offset 0xa000 from vtbar */ | |
3252 | drhd = dmar_find_matched_drhd_unit(pdev); | |
3253 | if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000, | |
3254 | TAINT_FIRMWARE_WORKAROUND, | |
3255 | "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n")) | |
3256 | pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
3257 | } | |
3258 | DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); | |
3259 | ||
ba395927 KA |
3260 | static void __init init_no_remapping_devices(void) |
3261 | { | |
3262 | struct dmar_drhd_unit *drhd; | |
3263 | ||
3264 | for_each_drhd_unit(drhd) { | |
3265 | if (!drhd->include_all) { | |
3266 | int i; | |
3267 | for (i = 0; i < drhd->devices_cnt; i++) | |
3268 | if (drhd->devices[i] != NULL) | |
3269 | break; | |
3270 | /* ignore DMAR unit if no pci devices exist */ | |
3271 | if (i == drhd->devices_cnt) | |
3272 | drhd->ignored = 1; | |
3273 | } | |
3274 | } | |
3275 | ||
ba395927 KA |
3276 | for_each_drhd_unit(drhd) { |
3277 | int i; | |
3278 | if (drhd->ignored || drhd->include_all) | |
3279 | continue; | |
3280 | ||
3281 | for (i = 0; i < drhd->devices_cnt; i++) | |
3282 | if (drhd->devices[i] && | |
c0771df8 | 3283 | !IS_GFX_DEVICE(drhd->devices[i])) |
ba395927 KA |
3284 | break; |
3285 | ||
3286 | if (i < drhd->devices_cnt) | |
3287 | continue; | |
3288 | ||
c0771df8 DW |
3289 | /* This IOMMU has *only* gfx devices. Either bypass it or |
3290 | set the gfx_mapped flag, as appropriate */ | |
3291 | if (dmar_map_gfx) { | |
3292 | intel_iommu_gfx_mapped = 1; | |
3293 | } else { | |
3294 | drhd->ignored = 1; | |
3295 | for (i = 0; i < drhd->devices_cnt; i++) { | |
3296 | if (!drhd->devices[i]) | |
3297 | continue; | |
3298 | drhd->devices[i]->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; | |
3299 | } | |
ba395927 KA |
3300 | } |
3301 | } | |
3302 | } | |
3303 | ||
f59c7b69 FY |
3304 | #ifdef CONFIG_SUSPEND |
3305 | static int init_iommu_hw(void) | |
3306 | { | |
3307 | struct dmar_drhd_unit *drhd; | |
3308 | struct intel_iommu *iommu = NULL; | |
3309 | ||
3310 | for_each_active_iommu(iommu, drhd) | |
3311 | if (iommu->qi) | |
3312 | dmar_reenable_qi(iommu); | |
3313 | ||
b779260b JC |
3314 | for_each_iommu(iommu, drhd) { |
3315 | if (drhd->ignored) { | |
3316 | /* | |
3317 | * we always have to disable PMRs or DMA may fail on | |
3318 | * this device | |
3319 | */ | |
3320 | if (force_on) | |
3321 | iommu_disable_protect_mem_regions(iommu); | |
3322 | continue; | |
3323 | } | |
3324 | ||
f59c7b69 FY |
3325 | iommu_flush_write_buffer(iommu); |
3326 | ||
3327 | iommu_set_root_entry(iommu); | |
3328 | ||
3329 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3330 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3331 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3332 | DMA_TLB_GLOBAL_FLUSH); |
b779260b JC |
3333 | if (iommu_enable_translation(iommu)) |
3334 | return 1; | |
b94996c9 | 3335 | iommu_disable_protect_mem_regions(iommu); |
f59c7b69 FY |
3336 | } |
3337 | ||
3338 | return 0; | |
3339 | } | |
3340 | ||
3341 | static void iommu_flush_all(void) | |
3342 | { | |
3343 | struct dmar_drhd_unit *drhd; | |
3344 | struct intel_iommu *iommu; | |
3345 | ||
3346 | for_each_active_iommu(iommu, drhd) { | |
3347 | iommu->flush.flush_context(iommu, 0, 0, 0, | |
1f0ef2aa | 3348 | DMA_CCMD_GLOBAL_INVL); |
f59c7b69 | 3349 | iommu->flush.flush_iotlb(iommu, 0, 0, 0, |
1f0ef2aa | 3350 | DMA_TLB_GLOBAL_FLUSH); |
f59c7b69 FY |
3351 | } |
3352 | } | |
3353 | ||
134fac3f | 3354 | static int iommu_suspend(void) |
f59c7b69 FY |
3355 | { |
3356 | struct dmar_drhd_unit *drhd; | |
3357 | struct intel_iommu *iommu = NULL; | |
3358 | unsigned long flag; | |
3359 | ||
3360 | for_each_active_iommu(iommu, drhd) { | |
3361 | iommu->iommu_state = kzalloc(sizeof(u32) * MAX_SR_DMAR_REGS, | |
3362 | GFP_ATOMIC); | |
3363 | if (!iommu->iommu_state) | |
3364 | goto nomem; | |
3365 | } | |
3366 | ||
3367 | iommu_flush_all(); | |
3368 | ||
3369 | for_each_active_iommu(iommu, drhd) { | |
3370 | iommu_disable_translation(iommu); | |
3371 | ||
1f5b3c3f | 3372 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
3373 | |
3374 | iommu->iommu_state[SR_DMAR_FECTL_REG] = | |
3375 | readl(iommu->reg + DMAR_FECTL_REG); | |
3376 | iommu->iommu_state[SR_DMAR_FEDATA_REG] = | |
3377 | readl(iommu->reg + DMAR_FEDATA_REG); | |
3378 | iommu->iommu_state[SR_DMAR_FEADDR_REG] = | |
3379 | readl(iommu->reg + DMAR_FEADDR_REG); | |
3380 | iommu->iommu_state[SR_DMAR_FEUADDR_REG] = | |
3381 | readl(iommu->reg + DMAR_FEUADDR_REG); | |
3382 | ||
1f5b3c3f | 3383 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
3384 | } |
3385 | return 0; | |
3386 | ||
3387 | nomem: | |
3388 | for_each_active_iommu(iommu, drhd) | |
3389 | kfree(iommu->iommu_state); | |
3390 | ||
3391 | return -ENOMEM; | |
3392 | } | |
3393 | ||
134fac3f | 3394 | static void iommu_resume(void) |
f59c7b69 FY |
3395 | { |
3396 | struct dmar_drhd_unit *drhd; | |
3397 | struct intel_iommu *iommu = NULL; | |
3398 | unsigned long flag; | |
3399 | ||
3400 | if (init_iommu_hw()) { | |
b779260b JC |
3401 | if (force_on) |
3402 | panic("tboot: IOMMU setup failed, DMAR can not resume!\n"); | |
3403 | else | |
3404 | WARN(1, "IOMMU setup failed, DMAR can not resume!\n"); | |
134fac3f | 3405 | return; |
f59c7b69 FY |
3406 | } |
3407 | ||
3408 | for_each_active_iommu(iommu, drhd) { | |
3409 | ||
1f5b3c3f | 3410 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
f59c7b69 FY |
3411 | |
3412 | writel(iommu->iommu_state[SR_DMAR_FECTL_REG], | |
3413 | iommu->reg + DMAR_FECTL_REG); | |
3414 | writel(iommu->iommu_state[SR_DMAR_FEDATA_REG], | |
3415 | iommu->reg + DMAR_FEDATA_REG); | |
3416 | writel(iommu->iommu_state[SR_DMAR_FEADDR_REG], | |
3417 | iommu->reg + DMAR_FEADDR_REG); | |
3418 | writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], | |
3419 | iommu->reg + DMAR_FEUADDR_REG); | |
3420 | ||
1f5b3c3f | 3421 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
f59c7b69 FY |
3422 | } |
3423 | ||
3424 | for_each_active_iommu(iommu, drhd) | |
3425 | kfree(iommu->iommu_state); | |
f59c7b69 FY |
3426 | } |
3427 | ||
134fac3f | 3428 | static struct syscore_ops iommu_syscore_ops = { |
f59c7b69 FY |
3429 | .resume = iommu_resume, |
3430 | .suspend = iommu_suspend, | |
3431 | }; | |
3432 | ||
134fac3f | 3433 | static void __init init_iommu_pm_ops(void) |
f59c7b69 | 3434 | { |
134fac3f | 3435 | register_syscore_ops(&iommu_syscore_ops); |
f59c7b69 FY |
3436 | } |
3437 | ||
3438 | #else | |
99592ba4 | 3439 | static inline void init_iommu_pm_ops(void) {} |
f59c7b69 FY |
3440 | #endif /* CONFIG_PM */ |
3441 | ||
318fe7df SS |
3442 | LIST_HEAD(dmar_rmrr_units); |
3443 | ||
3444 | static void __init dmar_register_rmrr_unit(struct dmar_rmrr_unit *rmrr) | |
3445 | { | |
3446 | list_add(&rmrr->list, &dmar_rmrr_units); | |
3447 | } | |
3448 | ||
3449 | ||
3450 | int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header) | |
3451 | { | |
3452 | struct acpi_dmar_reserved_memory *rmrr; | |
3453 | struct dmar_rmrr_unit *rmrru; | |
3454 | ||
3455 | rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL); | |
3456 | if (!rmrru) | |
3457 | return -ENOMEM; | |
3458 | ||
3459 | rmrru->hdr = header; | |
3460 | rmrr = (struct acpi_dmar_reserved_memory *)header; | |
3461 | rmrru->base_address = rmrr->base_address; | |
3462 | rmrru->end_address = rmrr->end_address; | |
3463 | ||
3464 | dmar_register_rmrr_unit(rmrru); | |
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static int __init | |
3469 | rmrr_parse_dev(struct dmar_rmrr_unit *rmrru) | |
3470 | { | |
3471 | struct acpi_dmar_reserved_memory *rmrr; | |
3472 | int ret; | |
3473 | ||
3474 | rmrr = (struct acpi_dmar_reserved_memory *) rmrru->hdr; | |
3475 | ret = dmar_parse_dev_scope((void *)(rmrr + 1), | |
3476 | ((void *)rmrr) + rmrr->header.length, | |
3477 | &rmrru->devices_cnt, &rmrru->devices, rmrr->segment); | |
3478 | ||
3479 | if (ret || (rmrru->devices_cnt == 0)) { | |
3480 | list_del(&rmrru->list); | |
3481 | kfree(rmrru); | |
3482 | } | |
3483 | return ret; | |
3484 | } | |
3485 | ||
3486 | static LIST_HEAD(dmar_atsr_units); | |
3487 | ||
3488 | int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) | |
3489 | { | |
3490 | struct acpi_dmar_atsr *atsr; | |
3491 | struct dmar_atsr_unit *atsru; | |
3492 | ||
3493 | atsr = container_of(hdr, struct acpi_dmar_atsr, header); | |
3494 | atsru = kzalloc(sizeof(*atsru), GFP_KERNEL); | |
3495 | if (!atsru) | |
3496 | return -ENOMEM; | |
3497 | ||
3498 | atsru->hdr = hdr; | |
3499 | atsru->include_all = atsr->flags & 0x1; | |
3500 | ||
3501 | list_add(&atsru->list, &dmar_atsr_units); | |
3502 | ||
3503 | return 0; | |
3504 | } | |
3505 | ||
3506 | static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru) | |
3507 | { | |
3508 | int rc; | |
3509 | struct acpi_dmar_atsr *atsr; | |
3510 | ||
3511 | if (atsru->include_all) | |
3512 | return 0; | |
3513 | ||
3514 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
3515 | rc = dmar_parse_dev_scope((void *)(atsr + 1), | |
3516 | (void *)atsr + atsr->header.length, | |
3517 | &atsru->devices_cnt, &atsru->devices, | |
3518 | atsr->segment); | |
3519 | if (rc || !atsru->devices_cnt) { | |
3520 | list_del(&atsru->list); | |
3521 | kfree(atsru); | |
3522 | } | |
3523 | ||
3524 | return rc; | |
3525 | } | |
3526 | ||
3527 | int dmar_find_matched_atsr_unit(struct pci_dev *dev) | |
3528 | { | |
3529 | int i; | |
3530 | struct pci_bus *bus; | |
3531 | struct acpi_dmar_atsr *atsr; | |
3532 | struct dmar_atsr_unit *atsru; | |
3533 | ||
3534 | dev = pci_physfn(dev); | |
3535 | ||
3536 | list_for_each_entry(atsru, &dmar_atsr_units, list) { | |
3537 | atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); | |
3538 | if (atsr->segment == pci_domain_nr(dev->bus)) | |
3539 | goto found; | |
3540 | } | |
3541 | ||
3542 | return 0; | |
3543 | ||
3544 | found: | |
3545 | for (bus = dev->bus; bus; bus = bus->parent) { | |
3546 | struct pci_dev *bridge = bus->self; | |
3547 | ||
3548 | if (!bridge || !pci_is_pcie(bridge) || | |
3549 | bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) | |
3550 | return 0; | |
3551 | ||
3552 | if (bridge->pcie_type == PCI_EXP_TYPE_ROOT_PORT) { | |
3553 | for (i = 0; i < atsru->devices_cnt; i++) | |
3554 | if (atsru->devices[i] == bridge) | |
3555 | return 1; | |
3556 | break; | |
3557 | } | |
3558 | } | |
3559 | ||
3560 | if (atsru->include_all) | |
3561 | return 1; | |
3562 | ||
3563 | return 0; | |
3564 | } | |
3565 | ||
c8f369ab | 3566 | int __init dmar_parse_rmrr_atsr_dev(void) |
318fe7df SS |
3567 | { |
3568 | struct dmar_rmrr_unit *rmrr, *rmrr_n; | |
3569 | struct dmar_atsr_unit *atsr, *atsr_n; | |
3570 | int ret = 0; | |
3571 | ||
3572 | list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { | |
3573 | ret = rmrr_parse_dev(rmrr); | |
3574 | if (ret) | |
3575 | return ret; | |
3576 | } | |
3577 | ||
3578 | list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { | |
3579 | ret = atsr_parse_dev(atsr); | |
3580 | if (ret) | |
3581 | return ret; | |
3582 | } | |
3583 | ||
3584 | return ret; | |
3585 | } | |
3586 | ||
99dcaded FY |
3587 | /* |
3588 | * Here we only respond to action of unbound device from driver. | |
3589 | * | |
3590 | * Added device is not attached to its DMAR domain here yet. That will happen | |
3591 | * when mapping the device to iova. | |
3592 | */ | |
3593 | static int device_notifier(struct notifier_block *nb, | |
3594 | unsigned long action, void *data) | |
3595 | { | |
3596 | struct device *dev = data; | |
3597 | struct pci_dev *pdev = to_pci_dev(dev); | |
3598 | struct dmar_domain *domain; | |
3599 | ||
44cd613c DW |
3600 | if (iommu_no_mapping(dev)) |
3601 | return 0; | |
3602 | ||
99dcaded FY |
3603 | domain = find_domain(pdev); |
3604 | if (!domain) | |
3605 | return 0; | |
3606 | ||
a97590e5 | 3607 | if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) { |
99dcaded FY |
3608 | domain_remove_one_dev_info(domain, pdev); |
3609 | ||
a97590e5 AW |
3610 | if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && |
3611 | !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && | |
3612 | list_empty(&domain->devices)) | |
3613 | domain_exit(domain); | |
3614 | } | |
3615 | ||
99dcaded FY |
3616 | return 0; |
3617 | } | |
3618 | ||
3619 | static struct notifier_block device_nb = { | |
3620 | .notifier_call = device_notifier, | |
3621 | }; | |
3622 | ||
ba395927 KA |
3623 | int __init intel_iommu_init(void) |
3624 | { | |
3625 | int ret = 0; | |
3626 | ||
a59b50e9 JC |
3627 | /* VT-d is required for a TXT/tboot launch, so enforce that */ |
3628 | force_on = tboot_force_iommu(); | |
3629 | ||
3630 | if (dmar_table_init()) { | |
3631 | if (force_on) | |
3632 | panic("tboot: Failed to initialize DMAR table\n"); | |
ba395927 | 3633 | return -ENODEV; |
a59b50e9 | 3634 | } |
ba395927 | 3635 | |
c2c7286a | 3636 | if (dmar_dev_scope_init() < 0) { |
a59b50e9 JC |
3637 | if (force_on) |
3638 | panic("tboot: Failed to initialize DMAR device scope\n"); | |
1886e8a9 | 3639 | return -ENODEV; |
a59b50e9 | 3640 | } |
1886e8a9 | 3641 | |
75f1cdf1 | 3642 | if (no_iommu || dmar_disabled) |
2ae21010 SS |
3643 | return -ENODEV; |
3644 | ||
51a63e67 JC |
3645 | if (iommu_init_mempool()) { |
3646 | if (force_on) | |
3647 | panic("tboot: Failed to initialize iommu memory\n"); | |
3648 | return -ENODEV; | |
3649 | } | |
3650 | ||
318fe7df SS |
3651 | if (list_empty(&dmar_rmrr_units)) |
3652 | printk(KERN_INFO "DMAR: No RMRR found\n"); | |
3653 | ||
3654 | if (list_empty(&dmar_atsr_units)) | |
3655 | printk(KERN_INFO "DMAR: No ATSR found\n"); | |
3656 | ||
51a63e67 JC |
3657 | if (dmar_init_reserved_ranges()) { |
3658 | if (force_on) | |
3659 | panic("tboot: Failed to reserve iommu ranges\n"); | |
3660 | return -ENODEV; | |
3661 | } | |
ba395927 KA |
3662 | |
3663 | init_no_remapping_devices(); | |
3664 | ||
b779260b | 3665 | ret = init_dmars(); |
ba395927 | 3666 | if (ret) { |
a59b50e9 JC |
3667 | if (force_on) |
3668 | panic("tboot: Failed to initialize DMARs\n"); | |
ba395927 KA |
3669 | printk(KERN_ERR "IOMMU: dmar init failed\n"); |
3670 | put_iova_domain(&reserved_iova_list); | |
3671 | iommu_exit_mempool(); | |
3672 | return ret; | |
3673 | } | |
3674 | printk(KERN_INFO | |
3675 | "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); | |
3676 | ||
5e0d2a6f | 3677 | init_timer(&unmap_timer); |
75f1cdf1 FT |
3678 | #ifdef CONFIG_SWIOTLB |
3679 | swiotlb = 0; | |
3680 | #endif | |
19943b0e | 3681 | dma_ops = &intel_dma_ops; |
4ed0d3e6 | 3682 | |
134fac3f | 3683 | init_iommu_pm_ops(); |
a8bcbb0d | 3684 | |
4236d97d | 3685 | bus_set_iommu(&pci_bus_type, &intel_iommu_ops); |
a8bcbb0d | 3686 | |
99dcaded FY |
3687 | bus_register_notifier(&pci_bus_type, &device_nb); |
3688 | ||
8bc1f85c ED |
3689 | intel_iommu_enabled = 1; |
3690 | ||
ba395927 KA |
3691 | return 0; |
3692 | } | |
e820482c | 3693 | |
3199aa6b HW |
3694 | static void iommu_detach_dependent_devices(struct intel_iommu *iommu, |
3695 | struct pci_dev *pdev) | |
3696 | { | |
3697 | struct pci_dev *tmp, *parent; | |
3698 | ||
3699 | if (!iommu || !pdev) | |
3700 | return; | |
3701 | ||
3702 | /* dependent device detach */ | |
3703 | tmp = pci_find_upstream_pcie_bridge(pdev); | |
3704 | /* Secondary interface's bus number and devfn 0 */ | |
3705 | if (tmp) { | |
3706 | parent = pdev->bus->self; | |
3707 | while (parent != tmp) { | |
3708 | iommu_detach_dev(iommu, parent->bus->number, | |
276dbf99 | 3709 | parent->devfn); |
3199aa6b HW |
3710 | parent = parent->bus->self; |
3711 | } | |
45e829ea | 3712 | if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ |
3199aa6b HW |
3713 | iommu_detach_dev(iommu, |
3714 | tmp->subordinate->number, 0); | |
3715 | else /* this is a legacy PCI bridge */ | |
276dbf99 DW |
3716 | iommu_detach_dev(iommu, tmp->bus->number, |
3717 | tmp->devfn); | |
3199aa6b HW |
3718 | } |
3719 | } | |
3720 | ||
2c2e2c38 | 3721 | static void domain_remove_one_dev_info(struct dmar_domain *domain, |
c7151a8d WH |
3722 | struct pci_dev *pdev) |
3723 | { | |
3724 | struct device_domain_info *info; | |
3725 | struct intel_iommu *iommu; | |
3726 | unsigned long flags; | |
3727 | int found = 0; | |
3728 | struct list_head *entry, *tmp; | |
3729 | ||
276dbf99 DW |
3730 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3731 | pdev->devfn); | |
c7151a8d WH |
3732 | if (!iommu) |
3733 | return; | |
3734 | ||
3735 | spin_lock_irqsave(&device_domain_lock, flags); | |
3736 | list_for_each_safe(entry, tmp, &domain->devices) { | |
3737 | info = list_entry(entry, struct device_domain_info, link); | |
8519dc44 MH |
3738 | if (info->segment == pci_domain_nr(pdev->bus) && |
3739 | info->bus == pdev->bus->number && | |
c7151a8d | 3740 | info->devfn == pdev->devfn) { |
109b9b04 | 3741 | unlink_domain_info(info); |
c7151a8d WH |
3742 | spin_unlock_irqrestore(&device_domain_lock, flags); |
3743 | ||
93a23a72 | 3744 | iommu_disable_dev_iotlb(info); |
c7151a8d | 3745 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3746 | iommu_detach_dependent_devices(iommu, pdev); |
c7151a8d WH |
3747 | free_devinfo_mem(info); |
3748 | ||
3749 | spin_lock_irqsave(&device_domain_lock, flags); | |
3750 | ||
3751 | if (found) | |
3752 | break; | |
3753 | else | |
3754 | continue; | |
3755 | } | |
3756 | ||
3757 | /* if there is no other devices under the same iommu | |
3758 | * owned by this domain, clear this iommu in iommu_bmp | |
3759 | * update iommu count and coherency | |
3760 | */ | |
276dbf99 DW |
3761 | if (iommu == device_to_iommu(info->segment, info->bus, |
3762 | info->devfn)) | |
c7151a8d WH |
3763 | found = 1; |
3764 | } | |
3765 | ||
3e7abe25 RD |
3766 | spin_unlock_irqrestore(&device_domain_lock, flags); |
3767 | ||
c7151a8d WH |
3768 | if (found == 0) { |
3769 | unsigned long tmp_flags; | |
3770 | spin_lock_irqsave(&domain->iommu_lock, tmp_flags); | |
1b198bb0 | 3771 | clear_bit(iommu->seq_id, domain->iommu_bmp); |
c7151a8d | 3772 | domain->iommu_count--; |
58c610bd | 3773 | domain_update_iommu_cap(domain); |
c7151a8d | 3774 | spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); |
a97590e5 | 3775 | |
9b4554b2 AW |
3776 | if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && |
3777 | !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY)) { | |
3778 | spin_lock_irqsave(&iommu->lock, tmp_flags); | |
3779 | clear_bit(domain->id, iommu->domain_ids); | |
3780 | iommu->domains[domain->id] = NULL; | |
3781 | spin_unlock_irqrestore(&iommu->lock, tmp_flags); | |
3782 | } | |
c7151a8d | 3783 | } |
c7151a8d WH |
3784 | } |
3785 | ||
3786 | static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) | |
3787 | { | |
3788 | struct device_domain_info *info; | |
3789 | struct intel_iommu *iommu; | |
3790 | unsigned long flags1, flags2; | |
3791 | ||
3792 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3793 | while (!list_empty(&domain->devices)) { | |
3794 | info = list_entry(domain->devices.next, | |
3795 | struct device_domain_info, link); | |
109b9b04 | 3796 | unlink_domain_info(info); |
c7151a8d WH |
3797 | spin_unlock_irqrestore(&device_domain_lock, flags1); |
3798 | ||
93a23a72 | 3799 | iommu_disable_dev_iotlb(info); |
276dbf99 | 3800 | iommu = device_to_iommu(info->segment, info->bus, info->devfn); |
c7151a8d | 3801 | iommu_detach_dev(iommu, info->bus, info->devfn); |
3199aa6b | 3802 | iommu_detach_dependent_devices(iommu, info->dev); |
c7151a8d WH |
3803 | |
3804 | /* clear this iommu in iommu_bmp, update iommu count | |
58c610bd | 3805 | * and capabilities |
c7151a8d WH |
3806 | */ |
3807 | spin_lock_irqsave(&domain->iommu_lock, flags2); | |
3808 | if (test_and_clear_bit(iommu->seq_id, | |
1b198bb0 | 3809 | domain->iommu_bmp)) { |
c7151a8d | 3810 | domain->iommu_count--; |
58c610bd | 3811 | domain_update_iommu_cap(domain); |
c7151a8d WH |
3812 | } |
3813 | spin_unlock_irqrestore(&domain->iommu_lock, flags2); | |
3814 | ||
3815 | free_devinfo_mem(info); | |
3816 | spin_lock_irqsave(&device_domain_lock, flags1); | |
3817 | } | |
3818 | spin_unlock_irqrestore(&device_domain_lock, flags1); | |
3819 | } | |
3820 | ||
5e98c4b1 WH |
3821 | /* domain id for virtual machine, it won't be set in context */ |
3822 | static unsigned long vm_domid; | |
3823 | ||
3824 | static struct dmar_domain *iommu_alloc_vm_domain(void) | |
3825 | { | |
3826 | struct dmar_domain *domain; | |
3827 | ||
3828 | domain = alloc_domain_mem(); | |
3829 | if (!domain) | |
3830 | return NULL; | |
3831 | ||
3832 | domain->id = vm_domid++; | |
4c923d47 | 3833 | domain->nid = -1; |
1b198bb0 | 3834 | memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); |
5e98c4b1 WH |
3835 | domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; |
3836 | ||
3837 | return domain; | |
3838 | } | |
3839 | ||
2c2e2c38 | 3840 | static int md_domain_init(struct dmar_domain *domain, int guest_width) |
5e98c4b1 WH |
3841 | { |
3842 | int adjust_width; | |
3843 | ||
3844 | init_iova_domain(&domain->iovad, DMA_32BIT_PFN); | |
5e98c4b1 WH |
3845 | spin_lock_init(&domain->iommu_lock); |
3846 | ||
3847 | domain_reserve_special_ranges(domain); | |
3848 | ||
3849 | /* calculate AGAW */ | |
3850 | domain->gaw = guest_width; | |
3851 | adjust_width = guestwidth_to_adjustwidth(guest_width); | |
3852 | domain->agaw = width_to_agaw(adjust_width); | |
3853 | ||
3854 | INIT_LIST_HEAD(&domain->devices); | |
3855 | ||
3856 | domain->iommu_count = 0; | |
3857 | domain->iommu_coherency = 0; | |
c5b15255 | 3858 | domain->iommu_snooping = 0; |
6dd9a7c7 | 3859 | domain->iommu_superpage = 0; |
fe40f1e0 | 3860 | domain->max_addr = 0; |
4c923d47 | 3861 | domain->nid = -1; |
5e98c4b1 WH |
3862 | |
3863 | /* always allocate the top pgd */ | |
4c923d47 | 3864 | domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid); |
5e98c4b1 WH |
3865 | if (!domain->pgd) |
3866 | return -ENOMEM; | |
3867 | domain_flush_cache(domain, domain->pgd, PAGE_SIZE); | |
3868 | return 0; | |
3869 | } | |
3870 | ||
3871 | static void iommu_free_vm_domain(struct dmar_domain *domain) | |
3872 | { | |
3873 | unsigned long flags; | |
3874 | struct dmar_drhd_unit *drhd; | |
3875 | struct intel_iommu *iommu; | |
3876 | unsigned long i; | |
3877 | unsigned long ndomains; | |
3878 | ||
3879 | for_each_drhd_unit(drhd) { | |
3880 | if (drhd->ignored) | |
3881 | continue; | |
3882 | iommu = drhd->iommu; | |
3883 | ||
3884 | ndomains = cap_ndoms(iommu->cap); | |
a45946ab | 3885 | for_each_set_bit(i, iommu->domain_ids, ndomains) { |
5e98c4b1 WH |
3886 | if (iommu->domains[i] == domain) { |
3887 | spin_lock_irqsave(&iommu->lock, flags); | |
3888 | clear_bit(i, iommu->domain_ids); | |
3889 | iommu->domains[i] = NULL; | |
3890 | spin_unlock_irqrestore(&iommu->lock, flags); | |
3891 | break; | |
3892 | } | |
5e98c4b1 WH |
3893 | } |
3894 | } | |
3895 | } | |
3896 | ||
3897 | static void vm_domain_exit(struct dmar_domain *domain) | |
3898 | { | |
5e98c4b1 WH |
3899 | /* Domain 0 is reserved, so dont process it */ |
3900 | if (!domain) | |
3901 | return; | |
3902 | ||
3903 | vm_domain_remove_all_dev_info(domain); | |
3904 | /* destroy iovas */ | |
3905 | put_iova_domain(&domain->iovad); | |
5e98c4b1 WH |
3906 | |
3907 | /* clear ptes */ | |
595badf5 | 3908 | dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3909 | |
3910 | /* free page tables */ | |
d794dc9b | 3911 | dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); |
5e98c4b1 WH |
3912 | |
3913 | iommu_free_vm_domain(domain); | |
3914 | free_domain_mem(domain); | |
3915 | } | |
3916 | ||
5d450806 | 3917 | static int intel_iommu_domain_init(struct iommu_domain *domain) |
38717946 | 3918 | { |
5d450806 | 3919 | struct dmar_domain *dmar_domain; |
38717946 | 3920 | |
5d450806 JR |
3921 | dmar_domain = iommu_alloc_vm_domain(); |
3922 | if (!dmar_domain) { | |
38717946 | 3923 | printk(KERN_ERR |
5d450806 JR |
3924 | "intel_iommu_domain_init: dmar_domain == NULL\n"); |
3925 | return -ENOMEM; | |
38717946 | 3926 | } |
2c2e2c38 | 3927 | if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { |
38717946 | 3928 | printk(KERN_ERR |
5d450806 JR |
3929 | "intel_iommu_domain_init() failed\n"); |
3930 | vm_domain_exit(dmar_domain); | |
3931 | return -ENOMEM; | |
38717946 | 3932 | } |
8140a95d | 3933 | domain_update_iommu_cap(dmar_domain); |
5d450806 | 3934 | domain->priv = dmar_domain; |
faa3d6f5 | 3935 | |
8a0e715b JR |
3936 | domain->geometry.aperture_start = 0; |
3937 | domain->geometry.aperture_end = __DOMAIN_MAX_ADDR(dmar_domain->gaw); | |
3938 | domain->geometry.force_aperture = true; | |
3939 | ||
5d450806 | 3940 | return 0; |
38717946 | 3941 | } |
38717946 | 3942 | |
5d450806 | 3943 | static void intel_iommu_domain_destroy(struct iommu_domain *domain) |
38717946 | 3944 | { |
5d450806 JR |
3945 | struct dmar_domain *dmar_domain = domain->priv; |
3946 | ||
3947 | domain->priv = NULL; | |
3948 | vm_domain_exit(dmar_domain); | |
38717946 | 3949 | } |
38717946 | 3950 | |
4c5478c9 JR |
3951 | static int intel_iommu_attach_device(struct iommu_domain *domain, |
3952 | struct device *dev) | |
38717946 | 3953 | { |
4c5478c9 JR |
3954 | struct dmar_domain *dmar_domain = domain->priv; |
3955 | struct pci_dev *pdev = to_pci_dev(dev); | |
fe40f1e0 WH |
3956 | struct intel_iommu *iommu; |
3957 | int addr_width; | |
faa3d6f5 WH |
3958 | |
3959 | /* normally pdev is not mapped */ | |
3960 | if (unlikely(domain_context_mapped(pdev))) { | |
3961 | struct dmar_domain *old_domain; | |
3962 | ||
3963 | old_domain = find_domain(pdev); | |
3964 | if (old_domain) { | |
2c2e2c38 FY |
3965 | if (dmar_domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || |
3966 | dmar_domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) | |
3967 | domain_remove_one_dev_info(old_domain, pdev); | |
faa3d6f5 WH |
3968 | else |
3969 | domain_remove_dev_info(old_domain); | |
3970 | } | |
3971 | } | |
3972 | ||
276dbf99 DW |
3973 | iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, |
3974 | pdev->devfn); | |
fe40f1e0 WH |
3975 | if (!iommu) |
3976 | return -ENODEV; | |
3977 | ||
3978 | /* check if this iommu agaw is sufficient for max mapped address */ | |
3979 | addr_width = agaw_to_width(iommu->agaw); | |
a99c47a2 TL |
3980 | if (addr_width > cap_mgaw(iommu->cap)) |
3981 | addr_width = cap_mgaw(iommu->cap); | |
3982 | ||
3983 | if (dmar_domain->max_addr > (1LL << addr_width)) { | |
3984 | printk(KERN_ERR "%s: iommu width (%d) is not " | |
fe40f1e0 | 3985 | "sufficient for the mapped address (%llx)\n", |
a99c47a2 | 3986 | __func__, addr_width, dmar_domain->max_addr); |
fe40f1e0 WH |
3987 | return -EFAULT; |
3988 | } | |
a99c47a2 TL |
3989 | dmar_domain->gaw = addr_width; |
3990 | ||
3991 | /* | |
3992 | * Knock out extra levels of page tables if necessary | |
3993 | */ | |
3994 | while (iommu->agaw < dmar_domain->agaw) { | |
3995 | struct dma_pte *pte; | |
3996 | ||
3997 | pte = dmar_domain->pgd; | |
3998 | if (dma_pte_present(pte)) { | |
25cbff16 SY |
3999 | dmar_domain->pgd = (struct dma_pte *) |
4000 | phys_to_virt(dma_pte_addr(pte)); | |
7a661013 | 4001 | free_pgtable_page(pte); |
a99c47a2 TL |
4002 | } |
4003 | dmar_domain->agaw--; | |
4004 | } | |
fe40f1e0 | 4005 | |
5fe60f4e | 4006 | return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); |
38717946 | 4007 | } |
38717946 | 4008 | |
4c5478c9 JR |
4009 | static void intel_iommu_detach_device(struct iommu_domain *domain, |
4010 | struct device *dev) | |
38717946 | 4011 | { |
4c5478c9 JR |
4012 | struct dmar_domain *dmar_domain = domain->priv; |
4013 | struct pci_dev *pdev = to_pci_dev(dev); | |
4014 | ||
2c2e2c38 | 4015 | domain_remove_one_dev_info(dmar_domain, pdev); |
faa3d6f5 | 4016 | } |
c7151a8d | 4017 | |
b146a1c9 JR |
4018 | static int intel_iommu_map(struct iommu_domain *domain, |
4019 | unsigned long iova, phys_addr_t hpa, | |
5009065d | 4020 | size_t size, int iommu_prot) |
faa3d6f5 | 4021 | { |
dde57a21 | 4022 | struct dmar_domain *dmar_domain = domain->priv; |
fe40f1e0 | 4023 | u64 max_addr; |
dde57a21 | 4024 | int prot = 0; |
faa3d6f5 | 4025 | int ret; |
fe40f1e0 | 4026 | |
dde57a21 JR |
4027 | if (iommu_prot & IOMMU_READ) |
4028 | prot |= DMA_PTE_READ; | |
4029 | if (iommu_prot & IOMMU_WRITE) | |
4030 | prot |= DMA_PTE_WRITE; | |
9cf06697 SY |
4031 | if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) |
4032 | prot |= DMA_PTE_SNP; | |
dde57a21 | 4033 | |
163cc52c | 4034 | max_addr = iova + size; |
dde57a21 | 4035 | if (dmar_domain->max_addr < max_addr) { |
fe40f1e0 WH |
4036 | u64 end; |
4037 | ||
4038 | /* check if minimum agaw is sufficient for mapped address */ | |
8954da1f | 4039 | end = __DOMAIN_MAX_ADDR(dmar_domain->gaw) + 1; |
fe40f1e0 | 4040 | if (end < max_addr) { |
8954da1f | 4041 | printk(KERN_ERR "%s: iommu width (%d) is not " |
fe40f1e0 | 4042 | "sufficient for the mapped address (%llx)\n", |
8954da1f | 4043 | __func__, dmar_domain->gaw, max_addr); |
fe40f1e0 WH |
4044 | return -EFAULT; |
4045 | } | |
dde57a21 | 4046 | dmar_domain->max_addr = max_addr; |
fe40f1e0 | 4047 | } |
ad051221 DW |
4048 | /* Round up size to next multiple of PAGE_SIZE, if it and |
4049 | the low bits of hpa would take us onto the next page */ | |
88cb6a74 | 4050 | size = aligned_nrpages(hpa, size); |
ad051221 DW |
4051 | ret = domain_pfn_mapping(dmar_domain, iova >> VTD_PAGE_SHIFT, |
4052 | hpa >> VTD_PAGE_SHIFT, size, prot); | |
faa3d6f5 | 4053 | return ret; |
38717946 | 4054 | } |
38717946 | 4055 | |
5009065d OBC |
4056 | static size_t intel_iommu_unmap(struct iommu_domain *domain, |
4057 | unsigned long iova, size_t size) | |
38717946 | 4058 | { |
dde57a21 | 4059 | struct dmar_domain *dmar_domain = domain->priv; |
292827cb | 4060 | int order; |
4b99d352 | 4061 | |
292827cb | 4062 | order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, |
163cc52c | 4063 | (iova + size - 1) >> VTD_PAGE_SHIFT); |
fe40f1e0 | 4064 | |
163cc52c DW |
4065 | if (dmar_domain->max_addr == iova + size) |
4066 | dmar_domain->max_addr = iova; | |
b146a1c9 | 4067 | |
5009065d | 4068 | return PAGE_SIZE << order; |
38717946 | 4069 | } |
38717946 | 4070 | |
d14d6577 JR |
4071 | static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, |
4072 | unsigned long iova) | |
38717946 | 4073 | { |
d14d6577 | 4074 | struct dmar_domain *dmar_domain = domain->priv; |
38717946 | 4075 | struct dma_pte *pte; |
faa3d6f5 | 4076 | u64 phys = 0; |
38717946 | 4077 | |
6dd9a7c7 | 4078 | pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, 0); |
38717946 | 4079 | if (pte) |
faa3d6f5 | 4080 | phys = dma_pte_addr(pte); |
38717946 | 4081 | |
faa3d6f5 | 4082 | return phys; |
38717946 | 4083 | } |
a8bcbb0d | 4084 | |
dbb9fd86 SY |
4085 | static int intel_iommu_domain_has_cap(struct iommu_domain *domain, |
4086 | unsigned long cap) | |
4087 | { | |
4088 | struct dmar_domain *dmar_domain = domain->priv; | |
4089 | ||
4090 | if (cap == IOMMU_CAP_CACHE_COHERENCY) | |
4091 | return dmar_domain->iommu_snooping; | |
323f99cb | 4092 | if (cap == IOMMU_CAP_INTR_REMAP) |
95a02e97 | 4093 | return irq_remapping_enabled; |
dbb9fd86 SY |
4094 | |
4095 | return 0; | |
4096 | } | |
4097 | ||
783f157b | 4098 | static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) |
70ae6f0d | 4099 | { |
783f157b AW |
4100 | pci_dev_put(*from); |
4101 | *from = to; | |
4102 | } | |
70ae6f0d | 4103 | |
783f157b | 4104 | #define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) |
70ae6f0d | 4105 | |
abdfdde2 AW |
4106 | static int intel_iommu_add_device(struct device *dev) |
4107 | { | |
4108 | struct pci_dev *pdev = to_pci_dev(dev); | |
4109 | struct pci_dev *bridge, *dma_pdev; | |
4110 | struct iommu_group *group; | |
4111 | int ret; | |
70ae6f0d | 4112 | |
abdfdde2 AW |
4113 | if (!device_to_iommu(pci_domain_nr(pdev->bus), |
4114 | pdev->bus->number, pdev->devfn)) | |
70ae6f0d AW |
4115 | return -ENODEV; |
4116 | ||
4117 | bridge = pci_find_upstream_pcie_bridge(pdev); | |
4118 | if (bridge) { | |
abdfdde2 AW |
4119 | if (pci_is_pcie(bridge)) |
4120 | dma_pdev = pci_get_domain_bus_and_slot( | |
4121 | pci_domain_nr(pdev->bus), | |
4122 | bridge->subordinate->number, 0); | |
4123 | else | |
4124 | dma_pdev = pci_dev_get(bridge); | |
4125 | } else | |
4126 | dma_pdev = pci_dev_get(pdev); | |
4127 | ||
783f157b AW |
4128 | swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); |
4129 | ||
4130 | if (dma_pdev->multifunction && | |
4131 | !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) | |
4132 | swap_pci_ref(&dma_pdev, | |
4133 | pci_get_slot(dma_pdev->bus, | |
4134 | PCI_DEVFN(PCI_SLOT(dma_pdev->devfn), | |
4135 | 0))); | |
4136 | ||
4137 | while (!pci_is_root_bus(dma_pdev->bus)) { | |
4138 | if (pci_acs_path_enabled(dma_pdev->bus->self, | |
4139 | NULL, REQ_ACS_FLAGS)) | |
4140 | break; | |
4141 | ||
4142 | swap_pci_ref(&dma_pdev, pci_dev_get(dma_pdev->bus->self)); | |
4143 | } | |
4144 | ||
abdfdde2 AW |
4145 | group = iommu_group_get(&dma_pdev->dev); |
4146 | pci_dev_put(dma_pdev); | |
4147 | if (!group) { | |
4148 | group = iommu_group_alloc(); | |
4149 | if (IS_ERR(group)) | |
4150 | return PTR_ERR(group); | |
70ae6f0d AW |
4151 | } |
4152 | ||
abdfdde2 | 4153 | ret = iommu_group_add_device(group, dev); |
bcb71abe | 4154 | |
abdfdde2 AW |
4155 | iommu_group_put(group); |
4156 | return ret; | |
4157 | } | |
70ae6f0d | 4158 | |
abdfdde2 AW |
4159 | static void intel_iommu_remove_device(struct device *dev) |
4160 | { | |
4161 | iommu_group_remove_device(dev); | |
70ae6f0d AW |
4162 | } |
4163 | ||
a8bcbb0d JR |
4164 | static struct iommu_ops intel_iommu_ops = { |
4165 | .domain_init = intel_iommu_domain_init, | |
4166 | .domain_destroy = intel_iommu_domain_destroy, | |
4167 | .attach_dev = intel_iommu_attach_device, | |
4168 | .detach_dev = intel_iommu_detach_device, | |
b146a1c9 JR |
4169 | .map = intel_iommu_map, |
4170 | .unmap = intel_iommu_unmap, | |
a8bcbb0d | 4171 | .iova_to_phys = intel_iommu_iova_to_phys, |
dbb9fd86 | 4172 | .domain_has_cap = intel_iommu_domain_has_cap, |
abdfdde2 AW |
4173 | .add_device = intel_iommu_add_device, |
4174 | .remove_device = intel_iommu_remove_device, | |
6d1c56a9 | 4175 | .pgsize_bitmap = INTEL_IOMMU_PGSIZES, |
a8bcbb0d | 4176 | }; |
9af88143 DW |
4177 | |
4178 | static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) | |
4179 | { | |
4180 | /* | |
4181 | * Mobile 4 Series Chipset neglects to set RWBF capability, | |
4182 | * but needs it: | |
4183 | */ | |
4184 | printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); | |
4185 | rwbf_quirk = 1; | |
2d9e667e DW |
4186 | |
4187 | /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */ | |
4188 | if (dev->revision == 0x07) { | |
4189 | printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n"); | |
4190 | dmar_map_gfx = 0; | |
4191 | } | |
9af88143 DW |
4192 | } |
4193 | ||
4194 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); | |
e0fc7e0b | 4195 | |
eecfd57f AJ |
4196 | #define GGC 0x52 |
4197 | #define GGC_MEMORY_SIZE_MASK (0xf << 8) | |
4198 | #define GGC_MEMORY_SIZE_NONE (0x0 << 8) | |
4199 | #define GGC_MEMORY_SIZE_1M (0x1 << 8) | |
4200 | #define GGC_MEMORY_SIZE_2M (0x3 << 8) | |
4201 | #define GGC_MEMORY_VT_ENABLED (0x8 << 8) | |
4202 | #define GGC_MEMORY_SIZE_2M_VT (0x9 << 8) | |
4203 | #define GGC_MEMORY_SIZE_3M_VT (0xa << 8) | |
4204 | #define GGC_MEMORY_SIZE_4M_VT (0xb << 8) | |
4205 | ||
9eecabcb DW |
4206 | static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev) |
4207 | { | |
4208 | unsigned short ggc; | |
4209 | ||
eecfd57f | 4210 | if (pci_read_config_word(dev, GGC, &ggc)) |
9eecabcb DW |
4211 | return; |
4212 | ||
eecfd57f | 4213 | if (!(ggc & GGC_MEMORY_VT_ENABLED)) { |
9eecabcb DW |
4214 | printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n"); |
4215 | dmar_map_gfx = 0; | |
6fbcfb3e DW |
4216 | } else if (dmar_map_gfx) { |
4217 | /* we have to ensure the gfx device is idle before we flush */ | |
4218 | printk(KERN_INFO "DMAR: Disabling batched IOTLB flush on Ironlake\n"); | |
4219 | intel_iommu_strict = 1; | |
4220 | } | |
9eecabcb DW |
4221 | } |
4222 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt); | |
4223 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt); | |
4224 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0062, quirk_calpella_no_shadow_gtt); | |
4225 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x006a, quirk_calpella_no_shadow_gtt); | |
4226 | ||
e0fc7e0b DW |
4227 | /* On Tylersburg chipsets, some BIOSes have been known to enable the |
4228 | ISOCH DMAR unit for the Azalia sound device, but not give it any | |
4229 | TLB entries, which causes it to deadlock. Check for that. We do | |
4230 | this in a function called from init_dmars(), instead of in a PCI | |
4231 | quirk, because we don't want to print the obnoxious "BIOS broken" | |
4232 | message if VT-d is actually disabled. | |
4233 | */ | |
4234 | static void __init check_tylersburg_isoch(void) | |
4235 | { | |
4236 | struct pci_dev *pdev; | |
4237 | uint32_t vtisochctrl; | |
4238 | ||
4239 | /* If there's no Azalia in the system anyway, forget it. */ | |
4240 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x3a3e, NULL); | |
4241 | if (!pdev) | |
4242 | return; | |
4243 | pci_dev_put(pdev); | |
4244 | ||
4245 | /* System Management Registers. Might be hidden, in which case | |
4246 | we can't do the sanity check. But that's OK, because the | |
4247 | known-broken BIOSes _don't_ actually hide it, so far. */ | |
4248 | pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x342e, NULL); | |
4249 | if (!pdev) | |
4250 | return; | |
4251 | ||
4252 | if (pci_read_config_dword(pdev, 0x188, &vtisochctrl)) { | |
4253 | pci_dev_put(pdev); | |
4254 | return; | |
4255 | } | |
4256 | ||
4257 | pci_dev_put(pdev); | |
4258 | ||
4259 | /* If Azalia DMA is routed to the non-isoch DMAR unit, fine. */ | |
4260 | if (vtisochctrl & 1) | |
4261 | return; | |
4262 | ||
4263 | /* Drop all bits other than the number of TLB entries */ | |
4264 | vtisochctrl &= 0x1c; | |
4265 | ||
4266 | /* If we have the recommended number of TLB entries (16), fine. */ | |
4267 | if (vtisochctrl == 0x10) | |
4268 | return; | |
4269 | ||
4270 | /* Zero TLB entries? You get to ride the short bus to school. */ | |
4271 | if (!vtisochctrl) { | |
4272 | WARN(1, "Your BIOS is broken; DMA routed to ISOCH DMAR unit but no TLB space.\n" | |
4273 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", | |
4274 | dmi_get_system_info(DMI_BIOS_VENDOR), | |
4275 | dmi_get_system_info(DMI_BIOS_VERSION), | |
4276 | dmi_get_system_info(DMI_PRODUCT_VERSION)); | |
4277 | iommu_identity_mapping |= IDENTMAP_AZALIA; | |
4278 | return; | |
4279 | } | |
4280 | ||
4281 | printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", | |
4282 | vtisochctrl); | |
4283 | } |