1 /*
2 * Copyright © 2006-2015, Intel Corporation.
3 *
4 * Authors: Ashok Raj <ashok.raj@intel.com>
5 * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
6 * David Woodhouse <David.Woodhouse@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
19 * Place - Suite 330, Boston, MA 02111-1307 USA.
20 */
21
22 #ifndef _INTEL_IOMMU_H_
23 #define _INTEL_IOMMU_H_
24
25 #include <linux/types.h>
26 #include <linux/iova.h>
27 #include <linux/io.h>
28 #include <linux/idr.h>
29 #include <linux/dma_remapping.h>
30 #include <linux/mmu_notifier.h>
31 #include <linux/list.h>
32 #include <linux/iommu.h>
33 #include <linux/io-64-nonatomic-lo-hi.h>
34 #include <linux/dmar.h>
35
36 #include <asm/cacheflush.h>
37 #include <asm/iommu.h>
38
39 /*
40 * Intel IOMMU register specification per version 1.0 public spec.
41 */
42
43 #define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
44 #define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
45 #define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
46 #define DMAR_GCMD_REG 0x18 /* Global command register */
47 #define DMAR_GSTS_REG 0x1c /* Global status register */
48 #define DMAR_RTADDR_REG 0x20 /* Root entry table */
49 #define DMAR_CCMD_REG 0x28 /* Context command reg */
50 #define DMAR_FSTS_REG 0x34 /* Fault Status register */
51 #define DMAR_FECTL_REG 0x38 /* Fault control register */
52 #define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */
53 #define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */
54 #define DMAR_FEUADDR_REG 0x44 /* Upper address register */
55 #define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */
56 #define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */
57 #define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */
58 #define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */
59 #define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */
60 #define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */
61 #define DMAR_IQH_REG 0x80 /* Invalidation queue head register */
62 #define DMAR_IQT_REG 0x88 /* Invalidation queue tail register */
63 #define DMAR_IQ_SHIFT 4 /* Invalidation queue head/tail shift */
64 #define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */
65 #define DMAR_ICS_REG 0x9c /* Invalidation complete status register */
66 #define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */
67 #define DMAR_PQH_REG 0xc0 /* Page request queue head register */
68 #define DMAR_PQT_REG 0xc8 /* Page request queue tail register */
69 #define DMAR_PQA_REG 0xd0 /* Page request queue address register */
70 #define DMAR_PRS_REG 0xdc /* Page request status register */
71 #define DMAR_PECTL_REG 0xe0 /* Page request event control register */
72 #define DMAR_PEDATA_REG 0xe4 /* Page request event interrupt data register */
73 #define DMAR_PEADDR_REG 0xe8 /* Page request event interrupt addr register */
74 #define DMAR_PEUADDR_REG 0xec /* Page request event Upper address register */
75
76 #define OFFSET_STRIDE (9)
77
78 #define dmar_readq(a) readq(a)
79 #define dmar_writeq(a,v) writeq(v,a)
80
81 #define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
82 #define DMAR_VER_MINOR(v) ((v) & 0x0f)
83
84 /*
85 * Decoding Capability Register
86 */
87 #define cap_5lp_support(c) (((c) >> 60) & 1)
88 #define cap_pi_support(c) (((c) >> 59) & 1)
89 #define cap_fl1gp_support(c) (((c) >> 56) & 1)
90 #define cap_read_drain(c) (((c) >> 55) & 1)
91 #define cap_write_drain(c) (((c) >> 54) & 1)
92 #define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
93 #define cap_num_fault_regs(c) ((((c) >> 40) & 0xff) + 1)
94 #define cap_pgsel_inv(c) (((c) >> 39) & 1)
95
96 #define cap_super_page_val(c) (((c) >> 34) & 0xf)
97 #define cap_super_offset(c) (((find_first_bit(&cap_super_page_val(c), 4)) \
98 * OFFSET_STRIDE) + 21)
99
100 #define cap_fault_reg_offset(c) ((((c) >> 24) & 0x3ff) * 16)
101 #define cap_max_fault_reg_offset(c) \
102 (cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)
103
104 #define cap_zlr(c) (((c) >> 22) & 1)
105 #define cap_isoch(c) (((c) >> 23) & 1)
106 #define cap_mgaw(c) ((((c) >> 16) & 0x3f) + 1)
107 #define cap_sagaw(c) (((c) >> 8) & 0x1f)
108 #define cap_caching_mode(c) (((c) >> 7) & 1)
109 #define cap_phmr(c) (((c) >> 6) & 1)
110 #define cap_plmr(c) (((c) >> 5) & 1)
111 #define cap_rwbf(c) (((c) >> 4) & 1)
112 #define cap_afl(c) (((c) >> 3) & 1)
113 #define cap_ndoms(c) (((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
114 /*
115 * Extended Capability Register
116 */
117
118 #define ecap_dit(e) ((e >> 41) & 0x1)
119 #define ecap_pasid(e) ((e >> 40) & 0x1)
120 #define ecap_pss(e) ((e >> 35) & 0x1f)
121 #define ecap_eafs(e) ((e >> 34) & 0x1)
122 #define ecap_nwfs(e) ((e >> 33) & 0x1)
123 #define ecap_srs(e) ((e >> 31) & 0x1)
124 #define ecap_ers(e) ((e >> 30) & 0x1)
125 #define ecap_prs(e) ((e >> 29) & 0x1)
126 #define ecap_broken_pasid(e) ((e >> 28) & 0x1)
127 #define ecap_dis(e) ((e >> 27) & 0x1)
128 #define ecap_nest(e) ((e >> 26) & 0x1)
129 #define ecap_mts(e) ((e >> 25) & 0x1)
130 #define ecap_ecs(e) ((e >> 24) & 0x1)
131 #define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
132 #define ecap_max_iotlb_offset(e) (ecap_iotlb_offset(e) + 16)
133 #define ecap_coherent(e) ((e) & 0x1)
134 #define ecap_qis(e) ((e) & 0x2)
135 #define ecap_pass_through(e) ((e >> 6) & 0x1)
136 #define ecap_eim_support(e) ((e >> 4) & 0x1)
137 #define ecap_ir_support(e) ((e >> 3) & 0x1)
138 #define ecap_dev_iotlb_support(e) (((e) >> 2) & 0x1)
139 #define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
140 #define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */
141
142 /* IOTLB_REG */
143 #define DMA_TLB_FLUSH_GRANU_OFFSET 60
144 #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
145 #define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
146 #define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
147 #define DMA_TLB_IIRG(type) ((type >> 60) & 3)
148 #define DMA_TLB_IAIG(val) (((val) >> 57) & 3)
149 #define DMA_TLB_READ_DRAIN (((u64)1) << 49)
150 #define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
151 #define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32)
152 #define DMA_TLB_IVT (((u64)1) << 63)
153 #define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
154 #define DMA_TLB_MAX_SIZE (0x3f)
155
156 /* INVALID_DESC */
157 #define DMA_CCMD_INVL_GRANU_OFFSET 61
158 #define DMA_ID_TLB_GLOBAL_FLUSH (((u64)1) << 4)
159 #define DMA_ID_TLB_DSI_FLUSH (((u64)2) << 4)
160 #define DMA_ID_TLB_PSI_FLUSH (((u64)3) << 4)
161 #define DMA_ID_TLB_READ_DRAIN (((u64)1) << 7)
162 #define DMA_ID_TLB_WRITE_DRAIN (((u64)1) << 6)
163 #define DMA_ID_TLB_DID(id) (((u64)((id & 0xffff) << 16)))
164 #define DMA_ID_TLB_IH_NONLEAF (((u64)1) << 6)
165 #define DMA_ID_TLB_ADDR(addr) (addr)
166 #define DMA_ID_TLB_ADDR_MASK(mask) (mask)
167
168 /* PMEN_REG */
169 #define DMA_PMEN_EPM (((u32)1)<<31)
170 #define DMA_PMEN_PRS (((u32)1)<<0)
171
172 /* GCMD_REG */
173 #define DMA_GCMD_TE (((u32)1) << 31)
174 #define DMA_GCMD_SRTP (((u32)1) << 30)
175 #define DMA_GCMD_SFL (((u32)1) << 29)
176 #define DMA_GCMD_EAFL (((u32)1) << 28)
177 #define DMA_GCMD_WBF (((u32)1) << 27)
178 #define DMA_GCMD_QIE (((u32)1) << 26)
179 #define DMA_GCMD_SIRTP (((u32)1) << 24)
180 #define DMA_GCMD_IRE (((u32) 1) << 25)
181 #define DMA_GCMD_CFI (((u32) 1) << 23)
182
183 /* GSTS_REG */
184 #define DMA_GSTS_TES (((u32)1) << 31)
185 #define DMA_GSTS_RTPS (((u32)1) << 30)
186 #define DMA_GSTS_FLS (((u32)1) << 29)
187 #define DMA_GSTS_AFLS (((u32)1) << 28)
188 #define DMA_GSTS_WBFS (((u32)1) << 27)
189 #define DMA_GSTS_QIES (((u32)1) << 26)
190 #define DMA_GSTS_IRTPS (((u32)1) << 24)
191 #define DMA_GSTS_IRES (((u32)1) << 25)
192 #define DMA_GSTS_CFIS (((u32)1) << 23)
193
194 /* DMA_RTADDR_REG */
195 #define DMA_RTADDR_RTT (((u64)1) << 11)
196
197 /* CCMD_REG */
198 #define DMA_CCMD_ICC (((u64)1) << 63)
199 #define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
200 #define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
201 #define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
202 #define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
203 #define DMA_CCMD_MASK_NOBIT 0
204 #define DMA_CCMD_MASK_1BIT 1
205 #define DMA_CCMD_MASK_2BIT 2
206 #define DMA_CCMD_MASK_3BIT 3
207 #define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
208 #define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))
209
210 /* FECTL_REG */
211 #define DMA_FECTL_IM (((u32)1) << 31)
212
213 /* FSTS_REG */
214 #define DMA_FSTS_PFO (1 << 0) /* Primary Fault Overflow */
215 #define DMA_FSTS_PPF (1 << 1) /* Primary Pending Fault */
216 #define DMA_FSTS_IQE (1 << 4) /* Invalidation Queue Error */
217 #define DMA_FSTS_ICE (1 << 5) /* Invalidation Completion Error */
218 #define DMA_FSTS_ITE (1 << 6) /* Invalidation Time-out Error */
219 #define DMA_FSTS_PRO (1 << 7) /* Page Request Overflow */
220 #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)
221
222 /* FRCD_REG, 32 bits access */
223 #define DMA_FRCD_F (((u32)1) << 31)
224 #define dma_frcd_type(d) ((d >> 30) & 1)
225 #define dma_frcd_fault_reason(c) (c & 0xff)
226 #define dma_frcd_source_id(c) (c & 0xffff)
227 /* low 64 bit */
228 #define dma_frcd_page_addr(d) (d & (((u64)-1) << PAGE_SHIFT))
229
230 /* PRS_REG */
231 #define DMA_PRS_PPR ((u32)1)
232
233 #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
234 do { \
235 cycles_t start_time = get_cycles(); \
236 while (1) { \
237 sts = op(iommu->reg + offset); \
238 if (cond) \
239 break; \
240 if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
241 panic("DMAR hardware is malfunctioning\n"); \
242 cpu_relax(); \
243 } \
244 } while (0)
245
246 #define QI_LENGTH 256 /* queue length */
247
248 enum {
249 QI_FREE,
250 QI_IN_USE,
251 QI_DONE,
252 QI_ABORT
253 };
254
255 #define QI_CC_TYPE 0x1
256 #define QI_IOTLB_TYPE 0x2
257 #define QI_DIOTLB_TYPE 0x3
258 #define QI_IEC_TYPE 0x4
259 #define QI_IWD_TYPE 0x5
260 #define QI_EIOTLB_TYPE 0x6
261 #define QI_PC_TYPE 0x7
262 #define QI_DEIOTLB_TYPE 0x8
263 #define QI_PGRP_RESP_TYPE 0x9
264 #define QI_PSTRM_RESP_TYPE 0xa
265
266 #define QI_IEC_SELECTIVE (((u64)1) << 4)
267 #define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32))
268 #define QI_IEC_IM(m) (((u64)(m & 0x1f) << 27))
269
270 #define QI_IWD_STATUS_DATA(d) (((u64)d) << 32)
271 #define QI_IWD_STATUS_WRITE (((u64)1) << 5)
272
273 #define QI_IOTLB_DID(did) (((u64)did) << 16)
274 #define QI_IOTLB_DR(dr) (((u64)dr) << 7)
275 #define QI_IOTLB_DW(dw) (((u64)dw) << 6)
276 #define QI_IOTLB_GRAN(gran) (((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
277 #define QI_IOTLB_ADDR(addr) (((u64)addr) & VTD_PAGE_MASK)
278 #define QI_IOTLB_IH(ih) (((u64)ih) << 6)
279 #define QI_IOTLB_AM(am) (((u8)am))
280
281 #define QI_CC_FM(fm) (((u64)fm) << 48)
282 #define QI_CC_SID(sid) (((u64)sid) << 32)
283 #define QI_CC_DID(did) (((u64)did) << 16)
284 #define QI_CC_GRAN(gran) (((u64)gran) >> (DMA_CCMD_INVL_GRANU_OFFSET-4))
285
286 #define QI_DEV_IOTLB_SID(sid) ((u64)((sid) & 0xffff) << 32)
287 #define QI_DEV_IOTLB_QDEP(qdep) (((qdep) & 0x1f) << 16)
288 #define QI_DEV_IOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
289 #define QI_DEV_IOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
290 ((u64)((pfsid >> 4) & 0xfff) << 52))
291 #define QI_DEV_IOTLB_SIZE 1
292 #define QI_DEV_IOTLB_MAX_INVS 32
293
294 #define QI_PC_PASID(pasid) (((u64)pasid) << 32)
295 #define QI_PC_DID(did) (((u64)did) << 16)
296 #define QI_PC_GRAN(gran) (((u64)gran) << 4)
297
298 #define QI_PC_ALL_PASIDS (QI_PC_TYPE | QI_PC_GRAN(0))
299 #define QI_PC_PASID_SEL (QI_PC_TYPE | QI_PC_GRAN(1))
300
301 #define QI_EIOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
302 #define QI_EIOTLB_GL(gl) (((u64)gl) << 7)
303 #define QI_EIOTLB_IH(ih) (((u64)ih) << 6)
304 #define QI_EIOTLB_AM(am) (((u64)am))
305 #define QI_EIOTLB_PASID(pasid) (((u64)pasid) << 32)
306 #define QI_EIOTLB_DID(did) (((u64)did) << 16)
307 #define QI_EIOTLB_GRAN(gran) (((u64)gran) << 4)
308
309 #define QI_DEV_EIOTLB_ADDR(a) ((u64)(a) & VTD_PAGE_MASK)
310 #define QI_DEV_EIOTLB_SIZE (((u64)1) << 11)
311 #define QI_DEV_EIOTLB_GLOB(g) ((u64)(g) & 0x1)
312 #define QI_DEV_EIOTLB_PASID(p) ((u64)((p) & 0xfffff) << 32)
313 #define QI_DEV_EIOTLB_SID(sid) ((u64)((sid) & 0xffff) << 16)
314 #define QI_DEV_EIOTLB_QDEP(qd) ((u64)((qd) & 0x1f) << 4)
315 #define QI_DEV_EIOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
316 ((u64)((pfsid >> 4) & 0xfff) << 52))
317 #define QI_DEV_EIOTLB_MAX_INVS 32
318
319 #define QI_PGRP_IDX(idx) (((u64)(idx)) << 55)
320 #define QI_PGRP_PRIV(priv) (((u64)(priv)) << 32)
321 #define QI_PGRP_RESP_CODE(res) ((u64)(res))
322 #define QI_PGRP_PASID(pasid) (((u64)(pasid)) << 32)
323 #define QI_PGRP_DID(did) (((u64)(did)) << 16)
324 #define QI_PGRP_PASID_P(p) (((u64)(p)) << 4)
325
326 #define QI_PSTRM_ADDR(addr) (((u64)(addr)) & VTD_PAGE_MASK)
327 #define QI_PSTRM_DEVFN(devfn) (((u64)(devfn)) << 4)
328 #define QI_PSTRM_RESP_CODE(res) ((u64)(res))
329 #define QI_PSTRM_IDX(idx) (((u64)(idx)) << 55)
330 #define QI_PSTRM_PRIV(priv) (((u64)(priv)) << 32)
331 #define QI_PSTRM_BUS(bus) (((u64)(bus)) << 24)
332 #define QI_PSTRM_PASID(pasid) (((u64)(pasid)) << 4)
333
334 #define QI_RESP_SUCCESS 0x0
335 #define QI_RESP_INVALID 0x1
336 #define QI_RESP_FAILURE 0xf
337
338 #define QI_GRAN_ALL_ALL 0
339 #define QI_GRAN_NONG_ALL 1
340 #define QI_GRAN_NONG_PASID 2
341 #define QI_GRAN_PSI_PASID 3
342
343 struct qi_desc {
344 u64 low, high;
345 };
346
347 struct q_inval {
348 raw_spinlock_t q_lock;
349 struct qi_desc *desc; /* invalidation queue */
350 int *desc_status; /* desc status */
351 int free_head; /* first free entry */
352 int free_tail; /* last free entry */
353 int free_cnt;
354 };
355
356 #ifdef CONFIG_IRQ_REMAP
357 /* 1MB - maximum possible interrupt remapping table size */
358 #define INTR_REMAP_PAGE_ORDER 8
359 #define INTR_REMAP_TABLE_REG_SIZE 0xf
360 #define INTR_REMAP_TABLE_REG_SIZE_MASK 0xf
361
362 #define INTR_REMAP_TABLE_ENTRIES 65536
363
364 struct irq_domain;
365
366 struct ir_table {
367 struct irte *base;
368 unsigned long *bitmap;
369 };
370 #endif
371
372 struct iommu_flush {
373 void (*flush_context)(struct intel_iommu *iommu, u16 did, u16 sid,
374 u8 fm, u64 type);
375 void (*flush_iotlb)(struct intel_iommu *iommu, u16 did, u64 addr,
376 unsigned int size_order, u64 type);
377 };
378
379 enum {
380 SR_DMAR_FECTL_REG,
381 SR_DMAR_FEDATA_REG,
382 SR_DMAR_FEADDR_REG,
383 SR_DMAR_FEUADDR_REG,
384 MAX_SR_DMAR_REGS
385 };
386
387 #define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0)
388 #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1)
389
390 struct pasid_entry;
391 struct pasid_state_entry;
392 struct page_req_dsc;
393
394 struct dmar_domain {
395 int nid; /* node id */
396
397 unsigned iommu_refcnt[DMAR_UNITS_SUPPORTED];
398 /* Refcount of devices per iommu */
399
400
401 u16 iommu_did[DMAR_UNITS_SUPPORTED];
402 /* Domain ids per IOMMU. Use u16 since
403 * domain ids are 16 bit wide according
404 * to VT-d spec, section 9.3 */
405
406 bool has_iotlb_device;
407 struct list_head devices; /* all devices' list */
408 struct iova_domain iovad; /* iova's that belong to this domain */
409
410 struct dma_pte *pgd; /* virtual address */
411 int gaw; /* max guest address width */
412
413 /* adjusted guest address width, 0 is level 2 30-bit */
414 int agaw;
415
416 int flags; /* flags to find out type of domain */
417
418 int iommu_coherency;/* indicate coherency of iommu access */
419 int iommu_snooping; /* indicate snooping control feature*/
420 int iommu_count; /* reference count of iommu */
421 int iommu_superpage;/* Level of superpages supported:
422 0 == 4KiB (no superpages), 1 == 2MiB,
423 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
424 u64 max_addr; /* maximum mapped address */
425
426 struct iommu_domain domain; /* generic domain data structure for
427 iommu core */
428 };
429
430 struct intel_iommu {
431 void __iomem *reg; /* Pointer to hardware regs, virtual addr */
432 u64 reg_phys; /* physical address of hw register set */
433 u64 reg_size; /* size of hw register set */
434 u64 cap;
435 u64 ecap;
436 u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
437 raw_spinlock_t register_lock; /* protect register handling */
438 int seq_id; /* sequence id of the iommu */
439 int agaw; /* agaw of this iommu */
440 int msagaw; /* max sagaw of this iommu */
441 unsigned int irq, pr_irq;
442 u16 segment; /* PCI segment# */
443 unsigned char name[13]; /* Device Name */
444
445 #ifdef CONFIG_INTEL_IOMMU
446 unsigned long *domain_ids; /* bitmap of domains */
447 struct dmar_domain ***domains; /* ptr to domains */
448 spinlock_t lock; /* protect context, domain ids */
449 struct root_entry *root_entry; /* virtual address */
450
451 struct iommu_flush flush;
452 #endif
453 #ifdef CONFIG_INTEL_IOMMU_SVM
454 /* These are large and need to be contiguous, so we allocate just
455 * one for now. We'll maybe want to rethink that if we truly give
456 * devices away to userspace processes (e.g. for DPDK) and don't
457 * want to trust that userspace will use *only* the PASID it was
458 * told to. But while it's all driver-arbitrated, we're fine. */
459 struct pasid_state_entry *pasid_state_table;
460 struct page_req_dsc *prq;
461 unsigned char prq_name[16]; /* Name for PRQ interrupt */
462 u32 pasid_max;
463 #endif
464 struct q_inval *qi; /* Queued invalidation info */
465 u32 *iommu_state; /* Store iommu states between suspend and resume.*/
466
467 #ifdef CONFIG_IRQ_REMAP
468 struct ir_table *ir_table; /* Interrupt remapping info */
469 struct irq_domain *ir_domain;
470 struct irq_domain *ir_msi_domain;
471 #endif
472 struct iommu_device iommu; /* IOMMU core code handle */
473 int node;
474 u32 flags; /* Software defined flags */
475
476 struct dmar_drhd_unit *drhd;
477 };
478
479 /* PCI domain-device relationship */
480 struct device_domain_info {
481 struct list_head link; /* link to domain siblings */
482 struct list_head global; /* link to global list */
483 struct list_head table; /* link to pasid table */
484 u8 bus; /* PCI bus number */
485 u8 devfn; /* PCI devfn number */
486 u16 pfsid; /* SRIOV physical function source ID */
487 u8 pasid_supported:3;
488 u8 pasid_enabled:1;
489 u8 pri_supported:1;
490 u8 pri_enabled:1;
491 u8 ats_supported:1;
492 u8 ats_enabled:1;
493 u8 ats_qdep;
494 struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
495 struct intel_iommu *iommu; /* IOMMU used by this device */
496 struct dmar_domain *domain; /* pointer to domain */
497 struct pasid_table *pasid_table; /* pasid table */
498 };
499
__iommu_flush_cache(struct intel_iommu * iommu,void * addr,int size)500 static inline void __iommu_flush_cache(
501 struct intel_iommu *iommu, void *addr, int size)
502 {
503 if (!ecap_coherent(iommu->ecap))
504 clflush_cache_range(addr, size);
505 }
506
507 extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
508 extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);
509
510 extern int dmar_enable_qi(struct intel_iommu *iommu);
511 extern void dmar_disable_qi(struct intel_iommu *iommu);
512 extern int dmar_reenable_qi(struct intel_iommu *iommu);
513 extern void qi_global_iec(struct intel_iommu *iommu);
514
515 extern void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
516 u8 fm, u64 type);
517 extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
518 unsigned int size_order, u64 type);
519 extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
520 u16 qdep, u64 addr, unsigned mask);
521 extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
522
523 extern int dmar_ir_support(void);
524
525 struct dmar_domain *get_valid_domain_for_dev(struct device *dev);
526 void *alloc_pgtable_page(int node);
527 void free_pgtable_page(void *vaddr);
528 struct intel_iommu *domain_get_iommu(struct dmar_domain *domain);
529 int for_each_device_domain(int (*fn)(struct device_domain_info *info,
530 void *data), void *data);
531
532 #ifdef CONFIG_INTEL_IOMMU_SVM
533 int intel_svm_init(struct intel_iommu *iommu);
534 int intel_svm_exit(struct intel_iommu *iommu);
535 extern int intel_svm_enable_prq(struct intel_iommu *iommu);
536 extern int intel_svm_finish_prq(struct intel_iommu *iommu);
537
538 struct svm_dev_ops;
539
540 struct intel_svm_dev {
541 struct list_head list;
542 struct rcu_head rcu;
543 struct device *dev;
544 struct svm_dev_ops *ops;
545 int users;
546 u16 did;
547 u16 dev_iotlb:1;
548 u16 sid, qdep;
549 };
550
551 struct intel_svm {
552 struct mmu_notifier notifier;
553 struct mm_struct *mm;
554 struct intel_iommu *iommu;
555 int flags;
556 int pasid;
557 struct list_head devs;
558 struct list_head list;
559 };
560
561 extern int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev);
562 extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);
563 #endif
564
565 extern const struct attribute_group *intel_iommu_groups[];
566
567 #endif
568