1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright © 2006-2015, Intel Corporation.
4 *
5 * Authors: Ashok Raj <ashok.raj@intel.com>
6 * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
7 * David Woodhouse <David.Woodhouse@intel.com>
8 */
9
10 #ifndef _INTEL_IOMMU_H_
11 #define _INTEL_IOMMU_H_
12
13 #include <linux/types.h>
14 #include <linux/iova.h>
15 #include <linux/io.h>
16 #include <linux/idr.h>
17 #include <linux/mmu_notifier.h>
18 #include <linux/list.h>
19 #include <linux/iommu.h>
20 #include <linux/io-64-nonatomic-lo-hi.h>
21 #include <linux/dmar.h>
22 #include <linux/ioasid.h>
23 #include <linux/bitfield.h>
24 #include <linux/xarray.h>
25
26 #include <asm/cacheflush.h>
27 #include <asm/iommu.h>
28
29 /*
30 * VT-d hardware uses 4KiB page size regardless of host page size.
31 */
32 #define VTD_PAGE_SHIFT (12)
33 #define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
34 #define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
35 #define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
36
37 #define VTD_STRIDE_SHIFT (9)
38 #define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
39
40 #define DMA_PTE_READ BIT_ULL(0)
41 #define DMA_PTE_WRITE BIT_ULL(1)
42 #define DMA_PTE_LARGE_PAGE BIT_ULL(7)
43 #define DMA_PTE_SNP BIT_ULL(11)
44
45 #define DMA_FL_PTE_PRESENT BIT_ULL(0)
46 #define DMA_FL_PTE_US BIT_ULL(2)
47 #define DMA_FL_PTE_ACCESS BIT_ULL(5)
48 #define DMA_FL_PTE_DIRTY BIT_ULL(6)
49 #define DMA_FL_PTE_XD BIT_ULL(63)
50
51 #define ADDR_WIDTH_5LEVEL (57)
52 #define ADDR_WIDTH_4LEVEL (48)
53
54 #define CONTEXT_TT_MULTI_LEVEL 0
55 #define CONTEXT_TT_DEV_IOTLB 1
56 #define CONTEXT_TT_PASS_THROUGH 2
57 #define CONTEXT_PASIDE BIT_ULL(3)
58
59 /*
60 * Intel IOMMU register specification per version 1.0 public spec.
61 */
62 #define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
63 #define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
64 #define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
65 #define DMAR_GCMD_REG 0x18 /* Global command register */
66 #define DMAR_GSTS_REG 0x1c /* Global status register */
67 #define DMAR_RTADDR_REG 0x20 /* Root entry table */
68 #define DMAR_CCMD_REG 0x28 /* Context command reg */
69 #define DMAR_FSTS_REG 0x34 /* Fault Status register */
70 #define DMAR_FECTL_REG 0x38 /* Fault control register */
71 #define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */
72 #define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */
73 #define DMAR_FEUADDR_REG 0x44 /* Upper address register */
74 #define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */
75 #define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */
76 #define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */
77 #define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */
78 #define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */
79 #define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */
80 #define DMAR_IQH_REG 0x80 /* Invalidation queue head register */
81 #define DMAR_IQT_REG 0x88 /* Invalidation queue tail register */
82 #define DMAR_IQ_SHIFT 4 /* Invalidation queue head/tail shift */
83 #define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */
84 #define DMAR_ICS_REG 0x9c /* Invalidation complete status register */
85 #define DMAR_IQER_REG 0xb0 /* Invalidation queue error record register */
86 #define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */
87 #define DMAR_PQH_REG 0xc0 /* Page request queue head register */
88 #define DMAR_PQT_REG 0xc8 /* Page request queue tail register */
89 #define DMAR_PQA_REG 0xd0 /* Page request queue address register */
90 #define DMAR_PRS_REG 0xdc /* Page request status register */
91 #define DMAR_PECTL_REG 0xe0 /* Page request event control register */
92 #define DMAR_PEDATA_REG 0xe4 /* Page request event interrupt data register */
93 #define DMAR_PEADDR_REG 0xe8 /* Page request event interrupt addr register */
94 #define DMAR_PEUADDR_REG 0xec /* Page request event Upper address register */
95 #define DMAR_MTRRCAP_REG 0x100 /* MTRR capability register */
96 #define DMAR_MTRRDEF_REG 0x108 /* MTRR default type register */
97 #define DMAR_MTRR_FIX64K_00000_REG 0x120 /* MTRR Fixed range registers */
98 #define DMAR_MTRR_FIX16K_80000_REG 0x128
99 #define DMAR_MTRR_FIX16K_A0000_REG 0x130
100 #define DMAR_MTRR_FIX4K_C0000_REG 0x138
101 #define DMAR_MTRR_FIX4K_C8000_REG 0x140
102 #define DMAR_MTRR_FIX4K_D0000_REG 0x148
103 #define DMAR_MTRR_FIX4K_D8000_REG 0x150
104 #define DMAR_MTRR_FIX4K_E0000_REG 0x158
105 #define DMAR_MTRR_FIX4K_E8000_REG 0x160
106 #define DMAR_MTRR_FIX4K_F0000_REG 0x168
107 #define DMAR_MTRR_FIX4K_F8000_REG 0x170
108 #define DMAR_MTRR_PHYSBASE0_REG 0x180 /* MTRR Variable range registers */
109 #define DMAR_MTRR_PHYSMASK0_REG 0x188
110 #define DMAR_MTRR_PHYSBASE1_REG 0x190
111 #define DMAR_MTRR_PHYSMASK1_REG 0x198
112 #define DMAR_MTRR_PHYSBASE2_REG 0x1a0
113 #define DMAR_MTRR_PHYSMASK2_REG 0x1a8
114 #define DMAR_MTRR_PHYSBASE3_REG 0x1b0
115 #define DMAR_MTRR_PHYSMASK3_REG 0x1b8
116 #define DMAR_MTRR_PHYSBASE4_REG 0x1c0
117 #define DMAR_MTRR_PHYSMASK4_REG 0x1c8
118 #define DMAR_MTRR_PHYSBASE5_REG 0x1d0
119 #define DMAR_MTRR_PHYSMASK5_REG 0x1d8
120 #define DMAR_MTRR_PHYSBASE6_REG 0x1e0
121 #define DMAR_MTRR_PHYSMASK6_REG 0x1e8
122 #define DMAR_MTRR_PHYSBASE7_REG 0x1f0
123 #define DMAR_MTRR_PHYSMASK7_REG 0x1f8
124 #define DMAR_MTRR_PHYSBASE8_REG 0x200
125 #define DMAR_MTRR_PHYSMASK8_REG 0x208
126 #define DMAR_MTRR_PHYSBASE9_REG 0x210
127 #define DMAR_MTRR_PHYSMASK9_REG 0x218
128 #define DMAR_VCCAP_REG 0xe30 /* Virtual command capability register */
129 #define DMAR_VCMD_REG 0xe00 /* Virtual command register */
130 #define DMAR_VCRSP_REG 0xe10 /* Virtual command response register */
131
132 #define DMAR_IQER_REG_IQEI(reg) FIELD_GET(GENMASK_ULL(3, 0), reg)
133 #define DMAR_IQER_REG_ITESID(reg) FIELD_GET(GENMASK_ULL(47, 32), reg)
134 #define DMAR_IQER_REG_ICESID(reg) FIELD_GET(GENMASK_ULL(63, 48), reg)
135
136 #define OFFSET_STRIDE (9)
137
138 #define dmar_readq(a) readq(a)
139 #define dmar_writeq(a,v) writeq(v,a)
140 #define dmar_readl(a) readl(a)
141 #define dmar_writel(a, v) writel(v, a)
142
143 #define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
144 #define DMAR_VER_MINOR(v) ((v) & 0x0f)
145
146 /*
147 * Decoding Capability Register
148 */
149 #define cap_esrtps(c) (((c) >> 63) & 1)
150 #define cap_esirtps(c) (((c) >> 62) & 1)
151 #define cap_fl5lp_support(c) (((c) >> 60) & 1)
152 #define cap_pi_support(c) (((c) >> 59) & 1)
153 #define cap_fl1gp_support(c) (((c) >> 56) & 1)
154 #define cap_read_drain(c) (((c) >> 55) & 1)
155 #define cap_write_drain(c) (((c) >> 54) & 1)
156 #define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
157 #define cap_num_fault_regs(c) ((((c) >> 40) & 0xff) + 1)
158 #define cap_pgsel_inv(c) (((c) >> 39) & 1)
159
160 #define cap_super_page_val(c) (((c) >> 34) & 0xf)
161 #define cap_super_offset(c) (((find_first_bit(&cap_super_page_val(c), 4)) \
162 * OFFSET_STRIDE) + 21)
163
164 #define cap_fault_reg_offset(c) ((((c) >> 24) & 0x3ff) * 16)
165 #define cap_max_fault_reg_offset(c) \
166 (cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)
167
168 #define cap_zlr(c) (((c) >> 22) & 1)
169 #define cap_isoch(c) (((c) >> 23) & 1)
170 #define cap_mgaw(c) ((((c) >> 16) & 0x3f) + 1)
171 #define cap_sagaw(c) (((c) >> 8) & 0x1f)
172 #define cap_caching_mode(c) (((c) >> 7) & 1)
173 #define cap_phmr(c) (((c) >> 6) & 1)
174 #define cap_plmr(c) (((c) >> 5) & 1)
175 #define cap_rwbf(c) (((c) >> 4) & 1)
176 #define cap_afl(c) (((c) >> 3) & 1)
177 #define cap_ndoms(c) (((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
178 /*
179 * Extended Capability Register
180 */
181
182 #define ecap_rps(e) (((e) >> 49) & 0x1)
183 #define ecap_smpwc(e) (((e) >> 48) & 0x1)
184 #define ecap_flts(e) (((e) >> 47) & 0x1)
185 #define ecap_slts(e) (((e) >> 46) & 0x1)
186 #define ecap_slads(e) (((e) >> 45) & 0x1)
187 #define ecap_vcs(e) (((e) >> 44) & 0x1)
188 #define ecap_smts(e) (((e) >> 43) & 0x1)
189 #define ecap_dit(e) (((e) >> 41) & 0x1)
190 #define ecap_pds(e) (((e) >> 42) & 0x1)
191 #define ecap_pasid(e) (((e) >> 40) & 0x1)
192 #define ecap_pss(e) (((e) >> 35) & 0x1f)
193 #define ecap_eafs(e) (((e) >> 34) & 0x1)
194 #define ecap_nwfs(e) (((e) >> 33) & 0x1)
195 #define ecap_srs(e) (((e) >> 31) & 0x1)
196 #define ecap_ers(e) (((e) >> 30) & 0x1)
197 #define ecap_prs(e) (((e) >> 29) & 0x1)
198 #define ecap_broken_pasid(e) (((e) >> 28) & 0x1)
199 #define ecap_dis(e) (((e) >> 27) & 0x1)
200 #define ecap_nest(e) (((e) >> 26) & 0x1)
201 #define ecap_mts(e) (((e) >> 25) & 0x1)
202 #define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
203 #define ecap_max_iotlb_offset(e) (ecap_iotlb_offset(e) + 16)
204 #define ecap_coherent(e) ((e) & 0x1)
205 #define ecap_qis(e) ((e) & 0x2)
206 #define ecap_pass_through(e) (((e) >> 6) & 0x1)
207 #define ecap_eim_support(e) (((e) >> 4) & 0x1)
208 #define ecap_ir_support(e) (((e) >> 3) & 0x1)
209 #define ecap_dev_iotlb_support(e) (((e) >> 2) & 0x1)
210 #define ecap_max_handle_mask(e) (((e) >> 20) & 0xf)
211 #define ecap_sc_support(e) (((e) >> 7) & 0x1) /* Snooping Control */
212
213 /* Virtual command interface capability */
214 #define vccap_pasid(v) (((v) & DMA_VCS_PAS)) /* PASID allocation */
215
216 /* IOTLB_REG */
217 #define DMA_TLB_FLUSH_GRANU_OFFSET 60
218 #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
219 #define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
220 #define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
221 #define DMA_TLB_IIRG(type) ((type >> 60) & 3)
222 #define DMA_TLB_IAIG(val) (((val) >> 57) & 3)
223 #define DMA_TLB_READ_DRAIN (((u64)1) << 49)
224 #define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
225 #define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32)
226 #define DMA_TLB_IVT (((u64)1) << 63)
227 #define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
228 #define DMA_TLB_MAX_SIZE (0x3f)
229
230 /* INVALID_DESC */
231 #define DMA_CCMD_INVL_GRANU_OFFSET 61
232 #define DMA_ID_TLB_GLOBAL_FLUSH (((u64)1) << 4)
233 #define DMA_ID_TLB_DSI_FLUSH (((u64)2) << 4)
234 #define DMA_ID_TLB_PSI_FLUSH (((u64)3) << 4)
235 #define DMA_ID_TLB_READ_DRAIN (((u64)1) << 7)
236 #define DMA_ID_TLB_WRITE_DRAIN (((u64)1) << 6)
237 #define DMA_ID_TLB_DID(id) (((u64)((id & 0xffff) << 16)))
238 #define DMA_ID_TLB_IH_NONLEAF (((u64)1) << 6)
239 #define DMA_ID_TLB_ADDR(addr) (addr)
240 #define DMA_ID_TLB_ADDR_MASK(mask) (mask)
241
242 /* PMEN_REG */
243 #define DMA_PMEN_EPM (((u32)1)<<31)
244 #define DMA_PMEN_PRS (((u32)1)<<0)
245
246 /* GCMD_REG */
247 #define DMA_GCMD_TE (((u32)1) << 31)
248 #define DMA_GCMD_SRTP (((u32)1) << 30)
249 #define DMA_GCMD_SFL (((u32)1) << 29)
250 #define DMA_GCMD_EAFL (((u32)1) << 28)
251 #define DMA_GCMD_WBF (((u32)1) << 27)
252 #define DMA_GCMD_QIE (((u32)1) << 26)
253 #define DMA_GCMD_SIRTP (((u32)1) << 24)
254 #define DMA_GCMD_IRE (((u32) 1) << 25)
255 #define DMA_GCMD_CFI (((u32) 1) << 23)
256
257 /* GSTS_REG */
258 #define DMA_GSTS_TES (((u32)1) << 31)
259 #define DMA_GSTS_RTPS (((u32)1) << 30)
260 #define DMA_GSTS_FLS (((u32)1) << 29)
261 #define DMA_GSTS_AFLS (((u32)1) << 28)
262 #define DMA_GSTS_WBFS (((u32)1) << 27)
263 #define DMA_GSTS_QIES (((u32)1) << 26)
264 #define DMA_GSTS_IRTPS (((u32)1) << 24)
265 #define DMA_GSTS_IRES (((u32)1) << 25)
266 #define DMA_GSTS_CFIS (((u32)1) << 23)
267
268 /* DMA_RTADDR_REG */
269 #define DMA_RTADDR_SMT (((u64)1) << 10)
270
271 /* CCMD_REG */
272 #define DMA_CCMD_ICC (((u64)1) << 63)
273 #define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
274 #define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
275 #define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
276 #define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
277 #define DMA_CCMD_MASK_NOBIT 0
278 #define DMA_CCMD_MASK_1BIT 1
279 #define DMA_CCMD_MASK_2BIT 2
280 #define DMA_CCMD_MASK_3BIT 3
281 #define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
282 #define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))
283
284 /* FECTL_REG */
285 #define DMA_FECTL_IM (((u32)1) << 31)
286
287 /* FSTS_REG */
288 #define DMA_FSTS_PFO (1 << 0) /* Primary Fault Overflow */
289 #define DMA_FSTS_PPF (1 << 1) /* Primary Pending Fault */
290 #define DMA_FSTS_IQE (1 << 4) /* Invalidation Queue Error */
291 #define DMA_FSTS_ICE (1 << 5) /* Invalidation Completion Error */
292 #define DMA_FSTS_ITE (1 << 6) /* Invalidation Time-out Error */
293 #define DMA_FSTS_PRO (1 << 7) /* Page Request Overflow */
294 #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)
295
296 /* FRCD_REG, 32 bits access */
297 #define DMA_FRCD_F (((u32)1) << 31)
298 #define dma_frcd_type(d) ((d >> 30) & 1)
299 #define dma_frcd_fault_reason(c) (c & 0xff)
300 #define dma_frcd_source_id(c) (c & 0xffff)
301 #define dma_frcd_pasid_value(c) (((c) >> 8) & 0xfffff)
302 #define dma_frcd_pasid_present(c) (((c) >> 31) & 1)
303 /* low 64 bit */
304 #define dma_frcd_page_addr(d) (d & (((u64)-1) << PAGE_SHIFT))
305
306 /* PRS_REG */
307 #define DMA_PRS_PPR ((u32)1)
308 #define DMA_PRS_PRO ((u32)2)
309
310 #define DMA_VCS_PAS ((u64)1)
311
312 #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
313 do { \
314 cycles_t start_time = get_cycles(); \
315 while (1) { \
316 sts = op(iommu->reg + offset); \
317 if (cond) \
318 break; \
319 if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
320 panic("DMAR hardware is malfunctioning\n"); \
321 cpu_relax(); \
322 } \
323 } while (0)
324
325 #define QI_LENGTH 256 /* queue length */
326
327 enum {
328 QI_FREE,
329 QI_IN_USE,
330 QI_DONE,
331 QI_ABORT
332 };
333
334 #define QI_CC_TYPE 0x1
335 #define QI_IOTLB_TYPE 0x2
336 #define QI_DIOTLB_TYPE 0x3
337 #define QI_IEC_TYPE 0x4
338 #define QI_IWD_TYPE 0x5
339 #define QI_EIOTLB_TYPE 0x6
340 #define QI_PC_TYPE 0x7
341 #define QI_DEIOTLB_TYPE 0x8
342 #define QI_PGRP_RESP_TYPE 0x9
343 #define QI_PSTRM_RESP_TYPE 0xa
344
345 #define QI_IEC_SELECTIVE (((u64)1) << 4)
346 #define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32))
347 #define QI_IEC_IM(m) (((u64)(m & 0x1f) << 27))
348
349 #define QI_IWD_STATUS_DATA(d) (((u64)d) << 32)
350 #define QI_IWD_STATUS_WRITE (((u64)1) << 5)
351 #define QI_IWD_FENCE (((u64)1) << 6)
352 #define QI_IWD_PRQ_DRAIN (((u64)1) << 7)
353
354 #define QI_IOTLB_DID(did) (((u64)did) << 16)
355 #define QI_IOTLB_DR(dr) (((u64)dr) << 7)
356 #define QI_IOTLB_DW(dw) (((u64)dw) << 6)
357 #define QI_IOTLB_GRAN(gran) (((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
358 #define QI_IOTLB_ADDR(addr) (((u64)addr) & VTD_PAGE_MASK)
359 #define QI_IOTLB_IH(ih) (((u64)ih) << 6)
360 #define QI_IOTLB_AM(am) (((u8)am) & 0x3f)
361
362 #define QI_CC_FM(fm) (((u64)fm) << 48)
363 #define QI_CC_SID(sid) (((u64)sid) << 32)
364 #define QI_CC_DID(did) (((u64)did) << 16)
365 #define QI_CC_GRAN(gran) (((u64)gran) >> (DMA_CCMD_INVL_GRANU_OFFSET-4))
366
367 #define QI_DEV_IOTLB_SID(sid) ((u64)((sid) & 0xffff) << 32)
368 #define QI_DEV_IOTLB_QDEP(qdep) (((qdep) & 0x1f) << 16)
369 #define QI_DEV_IOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
370 #define QI_DEV_IOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
371 ((u64)((pfsid >> 4) & 0xfff) << 52))
372 #define QI_DEV_IOTLB_SIZE 1
373 #define QI_DEV_IOTLB_MAX_INVS 32
374
375 #define QI_PC_PASID(pasid) (((u64)pasid) << 32)
376 #define QI_PC_DID(did) (((u64)did) << 16)
377 #define QI_PC_GRAN(gran) (((u64)gran) << 4)
378
379 /* PASID cache invalidation granu */
380 #define QI_PC_ALL_PASIDS 0
381 #define QI_PC_PASID_SEL 1
382 #define QI_PC_GLOBAL 3
383
384 #define QI_EIOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
385 #define QI_EIOTLB_IH(ih) (((u64)ih) << 6)
386 #define QI_EIOTLB_AM(am) (((u64)am) & 0x3f)
387 #define QI_EIOTLB_PASID(pasid) (((u64)pasid) << 32)
388 #define QI_EIOTLB_DID(did) (((u64)did) << 16)
389 #define QI_EIOTLB_GRAN(gran) (((u64)gran) << 4)
390
391 /* QI Dev-IOTLB inv granu */
392 #define QI_DEV_IOTLB_GRAN_ALL 1
393 #define QI_DEV_IOTLB_GRAN_PASID_SEL 0
394
395 #define QI_DEV_EIOTLB_ADDR(a) ((u64)(a) & VTD_PAGE_MASK)
396 #define QI_DEV_EIOTLB_SIZE (((u64)1) << 11)
397 #define QI_DEV_EIOTLB_PASID(p) ((u64)((p) & 0xfffff) << 32)
398 #define QI_DEV_EIOTLB_SID(sid) ((u64)((sid) & 0xffff) << 16)
399 #define QI_DEV_EIOTLB_QDEP(qd) ((u64)((qd) & 0x1f) << 4)
400 #define QI_DEV_EIOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
401 ((u64)((pfsid >> 4) & 0xfff) << 52))
402 #define QI_DEV_EIOTLB_MAX_INVS 32
403
404 /* Page group response descriptor QW0 */
405 #define QI_PGRP_PASID_P(p) (((u64)(p)) << 4)
406 #define QI_PGRP_PDP(p) (((u64)(p)) << 5)
407 #define QI_PGRP_RESP_CODE(res) (((u64)(res)) << 12)
408 #define QI_PGRP_DID(rid) (((u64)(rid)) << 16)
409 #define QI_PGRP_PASID(pasid) (((u64)(pasid)) << 32)
410
411 /* Page group response descriptor QW1 */
412 #define QI_PGRP_LPIG(x) (((u64)(x)) << 2)
413 #define QI_PGRP_IDX(idx) (((u64)(idx)) << 3)
414
415
416 #define QI_RESP_SUCCESS 0x0
417 #define QI_RESP_INVALID 0x1
418 #define QI_RESP_FAILURE 0xf
419
420 #define QI_GRAN_NONG_PASID 2
421 #define QI_GRAN_PSI_PASID 3
422
423 #define qi_shift(iommu) (DMAR_IQ_SHIFT + !!ecap_smts((iommu)->ecap))
424
425 struct qi_desc {
426 u64 qw0;
427 u64 qw1;
428 u64 qw2;
429 u64 qw3;
430 };
431
432 struct q_inval {
433 raw_spinlock_t q_lock;
434 void *desc; /* invalidation queue */
435 int *desc_status; /* desc status */
436 int free_head; /* first free entry */
437 int free_tail; /* last free entry */
438 int free_cnt;
439 };
440
441 struct dmar_pci_notify_info;
442
443 #ifdef CONFIG_IRQ_REMAP
444 /* 1MB - maximum possible interrupt remapping table size */
445 #define INTR_REMAP_PAGE_ORDER 8
446 #define INTR_REMAP_TABLE_REG_SIZE 0xf
447 #define INTR_REMAP_TABLE_REG_SIZE_MASK 0xf
448
449 #define INTR_REMAP_TABLE_ENTRIES 65536
450
451 struct irq_domain;
452
453 struct ir_table {
454 struct irte *base;
455 unsigned long *bitmap;
456 };
457
458 void intel_irq_remap_add_device(struct dmar_pci_notify_info *info);
459 #else
460 static inline void
intel_irq_remap_add_device(struct dmar_pci_notify_info * info)461 intel_irq_remap_add_device(struct dmar_pci_notify_info *info) { }
462 #endif
463
464 struct iommu_flush {
465 void (*flush_context)(struct intel_iommu *iommu, u16 did, u16 sid,
466 u8 fm, u64 type);
467 void (*flush_iotlb)(struct intel_iommu *iommu, u16 did, u64 addr,
468 unsigned int size_order, u64 type);
469 };
470
471 enum {
472 SR_DMAR_FECTL_REG,
473 SR_DMAR_FEDATA_REG,
474 SR_DMAR_FEADDR_REG,
475 SR_DMAR_FEUADDR_REG,
476 MAX_SR_DMAR_REGS
477 };
478
479 #define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0)
480 #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1)
481 #define VTD_FLAG_SVM_CAPABLE (1 << 2)
482
483 #define sm_supported(iommu) (intel_iommu_sm && ecap_smts((iommu)->ecap))
484 #define pasid_supported(iommu) (sm_supported(iommu) && \
485 ecap_pasid((iommu)->ecap))
486
487 struct pasid_entry;
488 struct pasid_state_entry;
489 struct page_req_dsc;
490
491 /*
492 * 0: Present
493 * 1-11: Reserved
494 * 12-63: Context Ptr (12 - (haw-1))
495 * 64-127: Reserved
496 */
497 struct root_entry {
498 u64 lo;
499 u64 hi;
500 };
501
502 /*
503 * low 64 bits:
504 * 0: present
505 * 1: fault processing disable
506 * 2-3: translation type
507 * 12-63: address space root
508 * high 64 bits:
509 * 0-2: address width
510 * 3-6: aval
511 * 8-23: domain id
512 */
513 struct context_entry {
514 u64 lo;
515 u64 hi;
516 };
517
518 /*
519 * When VT-d works in the scalable mode, it allows DMA translation to
520 * happen through either first level or second level page table. This
521 * bit marks that the DMA translation for the domain goes through the
522 * first level page table, otherwise, it goes through the second level.
523 */
524 #define DOMAIN_FLAG_USE_FIRST_LEVEL BIT(1)
525
526 struct iommu_domain_info {
527 struct intel_iommu *iommu;
528 unsigned int refcnt; /* Refcount of devices per iommu */
529 u16 did; /* Domain ids per IOMMU. Use u16 since
530 * domain ids are 16 bit wide according
531 * to VT-d spec, section 9.3 */
532 };
533
534 struct dmar_domain {
535 int nid; /* node id */
536 struct xarray iommu_array; /* Attached IOMMU array */
537
538 u8 has_iotlb_device: 1;
539 u8 iommu_coherency: 1; /* indicate coherency of iommu access */
540 u8 force_snooping : 1; /* Create IOPTEs with snoop control */
541 u8 set_pte_snp:1;
542
543 spinlock_t lock; /* Protect device tracking lists */
544 struct list_head devices; /* all devices' list */
545
546 struct dma_pte *pgd; /* virtual address */
547 int gaw; /* max guest address width */
548
549 /* adjusted guest address width, 0 is level 2 30-bit */
550 int agaw;
551
552 int flags; /* flags to find out type of domain */
553 int iommu_superpage;/* Level of superpages supported:
554 0 == 4KiB (no superpages), 1 == 2MiB,
555 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
556 u64 max_addr; /* maximum mapped address */
557
558 struct iommu_domain domain; /* generic domain data structure for
559 iommu core */
560 };
561
562 struct intel_iommu {
563 void __iomem *reg; /* Pointer to hardware regs, virtual addr */
564 u64 reg_phys; /* physical address of hw register set */
565 u64 reg_size; /* size of hw register set */
566 u64 cap;
567 u64 ecap;
568 u64 vccap;
569 u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
570 raw_spinlock_t register_lock; /* protect register handling */
571 int seq_id; /* sequence id of the iommu */
572 int agaw; /* agaw of this iommu */
573 int msagaw; /* max sagaw of this iommu */
574 unsigned int irq, pr_irq;
575 u16 segment; /* PCI segment# */
576 unsigned char name[13]; /* Device Name */
577
578 #ifdef CONFIG_INTEL_IOMMU
579 unsigned long *domain_ids; /* bitmap of domains */
580 unsigned long *copied_tables; /* bitmap of copied tables */
581 spinlock_t lock; /* protect context, domain ids */
582 struct root_entry *root_entry; /* virtual address */
583
584 struct iommu_flush flush;
585 #endif
586 #ifdef CONFIG_INTEL_IOMMU_SVM
587 struct page_req_dsc *prq;
588 unsigned char prq_name[16]; /* Name for PRQ interrupt */
589 unsigned long prq_seq_number;
590 struct completion prq_complete;
591 struct ioasid_allocator_ops pasid_allocator; /* Custom allocator for PASIDs */
592 #endif
593 struct iopf_queue *iopf_queue;
594 unsigned char iopfq_name[16];
595 struct q_inval *qi; /* Queued invalidation info */
596 u32 iommu_state[MAX_SR_DMAR_REGS]; /* Store iommu states between suspend and resume.*/
597
598 #ifdef CONFIG_IRQ_REMAP
599 struct ir_table *ir_table; /* Interrupt remapping info */
600 struct irq_domain *ir_domain;
601 struct irq_domain *ir_msi_domain;
602 #endif
603 struct iommu_device iommu; /* IOMMU core code handle */
604 int node;
605 u32 flags; /* Software defined flags */
606
607 struct dmar_drhd_unit *drhd;
608 void *perf_statistic;
609 };
610
611 /* PCI domain-device relationship */
612 struct device_domain_info {
613 struct list_head link; /* link to domain siblings */
614 u32 segment; /* PCI segment number */
615 u8 bus; /* PCI bus number */
616 u8 devfn; /* PCI devfn number */
617 u16 pfsid; /* SRIOV physical function source ID */
618 u8 pasid_supported:3;
619 u8 pasid_enabled:1;
620 u8 pri_supported:1;
621 u8 pri_enabled:1;
622 u8 ats_supported:1;
623 u8 ats_enabled:1;
624 u8 dtlb_extra_inval:1; /* Quirk for devices need extra flush */
625 u8 ats_qdep;
626 struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
627 struct intel_iommu *iommu; /* IOMMU used by this device */
628 struct dmar_domain *domain; /* pointer to domain */
629 struct pasid_table *pasid_table; /* pasid table */
630 };
631
__iommu_flush_cache(struct intel_iommu * iommu,void * addr,int size)632 static inline void __iommu_flush_cache(
633 struct intel_iommu *iommu, void *addr, int size)
634 {
635 if (!ecap_coherent(iommu->ecap))
636 clflush_cache_range(addr, size);
637 }
638
639 /* Convert generic struct iommu_domain to private struct dmar_domain */
to_dmar_domain(struct iommu_domain * dom)640 static inline struct dmar_domain *to_dmar_domain(struct iommu_domain *dom)
641 {
642 return container_of(dom, struct dmar_domain, domain);
643 }
644
645 /* Retrieve the domain ID which has allocated to the domain */
646 static inline u16
domain_id_iommu(struct dmar_domain * domain,struct intel_iommu * iommu)647 domain_id_iommu(struct dmar_domain *domain, struct intel_iommu *iommu)
648 {
649 struct iommu_domain_info *info =
650 xa_load(&domain->iommu_array, iommu->seq_id);
651
652 return info->did;
653 }
654
655 /*
656 * 0: readable
657 * 1: writable
658 * 2-6: reserved
659 * 7: super page
660 * 8-10: available
661 * 11: snoop behavior
662 * 12-63: Host physical address
663 */
664 struct dma_pte {
665 u64 val;
666 };
667
dma_clear_pte(struct dma_pte * pte)668 static inline void dma_clear_pte(struct dma_pte *pte)
669 {
670 pte->val = 0;
671 }
672
dma_pte_addr(struct dma_pte * pte)673 static inline u64 dma_pte_addr(struct dma_pte *pte)
674 {
675 #ifdef CONFIG_64BIT
676 return pte->val & VTD_PAGE_MASK & (~DMA_FL_PTE_XD);
677 #else
678 /* Must have a full atomic 64-bit read */
679 return __cmpxchg64(&pte->val, 0ULL, 0ULL) &
680 VTD_PAGE_MASK & (~DMA_FL_PTE_XD);
681 #endif
682 }
683
dma_pte_present(struct dma_pte * pte)684 static inline bool dma_pte_present(struct dma_pte *pte)
685 {
686 return (pte->val & 3) != 0;
687 }
688
dma_pte_superpage(struct dma_pte * pte)689 static inline bool dma_pte_superpage(struct dma_pte *pte)
690 {
691 return (pte->val & DMA_PTE_LARGE_PAGE);
692 }
693
first_pte_in_page(struct dma_pte * pte)694 static inline bool first_pte_in_page(struct dma_pte *pte)
695 {
696 return IS_ALIGNED((unsigned long)pte, VTD_PAGE_SIZE);
697 }
698
nr_pte_to_next_page(struct dma_pte * pte)699 static inline int nr_pte_to_next_page(struct dma_pte *pte)
700 {
701 return first_pte_in_page(pte) ? BIT_ULL(VTD_STRIDE_SHIFT) :
702 (struct dma_pte *)ALIGN((unsigned long)pte, VTD_PAGE_SIZE) - pte;
703 }
704
context_present(struct context_entry * context)705 static inline bool context_present(struct context_entry *context)
706 {
707 return (context->lo & 1);
708 }
709
710 extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
711
712 extern int dmar_enable_qi(struct intel_iommu *iommu);
713 extern void dmar_disable_qi(struct intel_iommu *iommu);
714 extern int dmar_reenable_qi(struct intel_iommu *iommu);
715 extern void qi_global_iec(struct intel_iommu *iommu);
716
717 extern void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
718 u8 fm, u64 type);
719 extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
720 unsigned int size_order, u64 type);
721 extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
722 u16 qdep, u64 addr, unsigned mask);
723
724 void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
725 unsigned long npages, bool ih);
726
727 void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
728 u32 pasid, u16 qdep, u64 addr,
729 unsigned int size_order);
730 void quirk_extra_dev_tlb_flush(struct device_domain_info *info,
731 unsigned long address, unsigned long pages,
732 u32 pasid, u16 qdep);
733 void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did, u64 granu,
734 u32 pasid);
735
736 int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
737 unsigned int count, unsigned long options);
738 /*
739 * Options used in qi_submit_sync:
740 * QI_OPT_WAIT_DRAIN - Wait for PRQ drain completion, spec 6.5.2.8.
741 */
742 #define QI_OPT_WAIT_DRAIN BIT(0)
743
744 extern int dmar_ir_support(void);
745
746 void *alloc_pgtable_page(int node);
747 void free_pgtable_page(void *vaddr);
748 void iommu_flush_write_buffer(struct intel_iommu *iommu);
749 struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn);
750
751 #ifdef CONFIG_INTEL_IOMMU_SVM
752 extern void intel_svm_check(struct intel_iommu *iommu);
753 extern int intel_svm_enable_prq(struct intel_iommu *iommu);
754 extern int intel_svm_finish_prq(struct intel_iommu *iommu);
755 int intel_svm_page_response(struct device *dev, struct iommu_fault_event *evt,
756 struct iommu_page_response *msg);
757 struct iommu_domain *intel_svm_domain_alloc(void);
758 void intel_svm_remove_dev_pasid(struct device *dev, ioasid_t pasid);
759
760 struct intel_svm_dev {
761 struct list_head list;
762 struct rcu_head rcu;
763 struct device *dev;
764 struct intel_iommu *iommu;
765 struct iommu_sva sva;
766 u32 pasid;
767 int users;
768 u16 did;
769 u16 dev_iotlb:1;
770 u16 sid, qdep;
771 };
772
773 struct intel_svm {
774 struct mmu_notifier notifier;
775 struct mm_struct *mm;
776
777 unsigned int flags;
778 u32 pasid;
779 struct list_head devs;
780 };
781 #else
intel_svm_check(struct intel_iommu * iommu)782 static inline void intel_svm_check(struct intel_iommu *iommu) {}
intel_svm_domain_alloc(void)783 static inline struct iommu_domain *intel_svm_domain_alloc(void)
784 {
785 return NULL;
786 }
787
intel_svm_remove_dev_pasid(struct device * dev,ioasid_t pasid)788 static inline void intel_svm_remove_dev_pasid(struct device *dev, ioasid_t pasid)
789 {
790 }
791 #endif
792
793 #ifdef CONFIG_INTEL_IOMMU_DEBUGFS
794 void intel_iommu_debugfs_init(void);
795 #else
intel_iommu_debugfs_init(void)796 static inline void intel_iommu_debugfs_init(void) {}
797 #endif /* CONFIG_INTEL_IOMMU_DEBUGFS */
798
799 extern const struct attribute_group *intel_iommu_groups[];
800 struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
801 u8 devfn, int alloc);
802
803 extern const struct iommu_ops intel_iommu_ops;
804
805 #ifdef CONFIG_INTEL_IOMMU
806 extern int intel_iommu_sm;
807 extern int iommu_calculate_agaw(struct intel_iommu *iommu);
808 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
809 extern int dmar_disabled;
810 extern int intel_iommu_enabled;
811 #else
iommu_calculate_agaw(struct intel_iommu * iommu)812 static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
813 {
814 return 0;
815 }
iommu_calculate_max_sagaw(struct intel_iommu * iommu)816 static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
817 {
818 return 0;
819 }
820 #define dmar_disabled (1)
821 #define intel_iommu_enabled (0)
822 #define intel_iommu_sm (0)
823 #endif
824
decode_prq_descriptor(char * str,size_t size,u64 dw0,u64 dw1,u64 dw2,u64 dw3)825 static inline const char *decode_prq_descriptor(char *str, size_t size,
826 u64 dw0, u64 dw1, u64 dw2, u64 dw3)
827 {
828 char *buf = str;
829 int bytes;
830
831 bytes = snprintf(buf, size,
832 "rid=0x%llx addr=0x%llx %c%c%c%c%c pasid=0x%llx index=0x%llx",
833 FIELD_GET(GENMASK_ULL(31, 16), dw0),
834 FIELD_GET(GENMASK_ULL(63, 12), dw1),
835 dw1 & BIT_ULL(0) ? 'r' : '-',
836 dw1 & BIT_ULL(1) ? 'w' : '-',
837 dw0 & BIT_ULL(52) ? 'x' : '-',
838 dw0 & BIT_ULL(53) ? 'p' : '-',
839 dw1 & BIT_ULL(2) ? 'l' : '-',
840 FIELD_GET(GENMASK_ULL(51, 32), dw0),
841 FIELD_GET(GENMASK_ULL(11, 3), dw1));
842
843 /* Private Data */
844 if (dw0 & BIT_ULL(9)) {
845 size -= bytes;
846 buf += bytes;
847 snprintf(buf, size, " private=0x%llx/0x%llx\n", dw2, dw3);
848 }
849
850 return str;
851 }
852
853 #endif
854