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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: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | |
ba395927 KA |
20 | */ |
21 | ||
22 | #ifndef _INTEL_IOMMU_H_ | |
23 | #define _INTEL_IOMMU_H_ | |
24 | ||
25 | #include <linux/types.h> | |
26 | #include <linux/msi.h> | |
f661197e | 27 | #include <linux/sysdev.h> |
38717946 | 28 | #include <linux/iova.h> |
ba395927 | 29 | #include <linux/io.h> |
38717946 | 30 | #include <linux/dma_remapping.h> |
fe962e90 | 31 | #include <asm/cacheflush.h> |
f661197e | 32 | |
ba395927 KA |
33 | /* |
34 | * Intel IOMMU register specification per version 1.0 public spec. | |
35 | */ | |
36 | ||
37 | #define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */ | |
38 | #define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */ | |
39 | #define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */ | |
40 | #define DMAR_GCMD_REG 0x18 /* Global command register */ | |
41 | #define DMAR_GSTS_REG 0x1c /* Global status register */ | |
42 | #define DMAR_RTADDR_REG 0x20 /* Root entry table */ | |
43 | #define DMAR_CCMD_REG 0x28 /* Context command reg */ | |
44 | #define DMAR_FSTS_REG 0x34 /* Fault Status register */ | |
45 | #define DMAR_FECTL_REG 0x38 /* Fault control register */ | |
46 | #define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */ | |
47 | #define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */ | |
48 | #define DMAR_FEUADDR_REG 0x44 /* Upper address register */ | |
49 | #define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */ | |
50 | #define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */ | |
51 | #define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */ | |
52 | #define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */ | |
53 | #define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */ | |
54 | #define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */ | |
fe962e90 SS |
55 | #define DMAR_IQH_REG 0x80 /* Invalidation queue head register */ |
56 | #define DMAR_IQT_REG 0x88 /* Invalidation queue tail register */ | |
57 | #define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */ | |
58 | #define DMAR_ICS_REG 0x98 /* Invalidation complete status register */ | |
2ae21010 | 59 | #define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */ |
ba395927 KA |
60 | |
61 | #define OFFSET_STRIDE (9) | |
62 | /* | |
63 | #define dmar_readl(dmar, reg) readl(dmar + reg) | |
64 | #define dmar_readq(dmar, reg) ({ \ | |
65 | u32 lo, hi; \ | |
66 | lo = readl(dmar + reg); \ | |
67 | hi = readl(dmar + reg + 4); \ | |
68 | (((u64) hi) << 32) + lo; }) | |
69 | */ | |
4fe05bbc | 70 | static inline u64 dmar_readq(void __iomem *addr) |
ba395927 KA |
71 | { |
72 | u32 lo, hi; | |
73 | lo = readl(addr); | |
74 | hi = readl(addr + 4); | |
75 | return (((u64) hi) << 32) + lo; | |
76 | } | |
77 | ||
78 | static inline void dmar_writeq(void __iomem *addr, u64 val) | |
79 | { | |
80 | writel((u32)val, addr); | |
81 | writel((u32)(val >> 32), addr + 4); | |
82 | } | |
83 | ||
84 | #define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4) | |
85 | #define DMAR_VER_MINOR(v) ((v) & 0x0f) | |
86 | ||
87 | /* | |
88 | * Decoding Capability Register | |
89 | */ | |
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_niotlb_iunits(e) ((((e) >> 24) & 0xff) + 1) | |
119 | #define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16) | |
120 | #define ecap_max_iotlb_offset(e) \ | |
121 | (ecap_iotlb_offset(e) + ecap_niotlb_iunits(e) * 16) | |
122 | #define ecap_coherent(e) ((e) & 0x1) | |
fe962e90 | 123 | #define ecap_qis(e) ((e) & 0x2) |
ad3ad3f6 SS |
124 | #define ecap_eim_support(e) ((e >> 4) & 0x1) |
125 | #define ecap_ir_support(e) ((e >> 3) & 0x1) | |
b6fcb33a | 126 | #define ecap_max_handle_mask(e) ((e >> 20) & 0xf) |
ba395927 KA |
127 | |
128 | ||
129 | /* IOTLB_REG */ | |
130 | #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60) | |
131 | #define DMA_TLB_DSI_FLUSH (((u64)2) << 60) | |
132 | #define DMA_TLB_PSI_FLUSH (((u64)3) << 60) | |
133 | #define DMA_TLB_IIRG(type) ((type >> 60) & 7) | |
134 | #define DMA_TLB_IAIG(val) (((val) >> 57) & 7) | |
135 | #define DMA_TLB_READ_DRAIN (((u64)1) << 49) | |
136 | #define DMA_TLB_WRITE_DRAIN (((u64)1) << 48) | |
137 | #define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32) | |
138 | #define DMA_TLB_IVT (((u64)1) << 63) | |
139 | #define DMA_TLB_IH_NONLEAF (((u64)1) << 6) | |
140 | #define DMA_TLB_MAX_SIZE (0x3f) | |
141 | ||
fe962e90 SS |
142 | /* INVALID_DESC */ |
143 | #define DMA_ID_TLB_GLOBAL_FLUSH (((u64)1) << 3) | |
144 | #define DMA_ID_TLB_DSI_FLUSH (((u64)2) << 3) | |
145 | #define DMA_ID_TLB_PSI_FLUSH (((u64)3) << 3) | |
146 | #define DMA_ID_TLB_READ_DRAIN (((u64)1) << 7) | |
147 | #define DMA_ID_TLB_WRITE_DRAIN (((u64)1) << 6) | |
148 | #define DMA_ID_TLB_DID(id) (((u64)((id & 0xffff) << 16))) | |
149 | #define DMA_ID_TLB_IH_NONLEAF (((u64)1) << 6) | |
150 | #define DMA_ID_TLB_ADDR(addr) (addr) | |
151 | #define DMA_ID_TLB_ADDR_MASK(mask) (mask) | |
152 | ||
f8bab735 | 153 | /* PMEN_REG */ |
154 | #define DMA_PMEN_EPM (((u32)1)<<31) | |
155 | #define DMA_PMEN_PRS (((u32)1)<<0) | |
156 | ||
ba395927 KA |
157 | /* GCMD_REG */ |
158 | #define DMA_GCMD_TE (((u32)1) << 31) | |
159 | #define DMA_GCMD_SRTP (((u32)1) << 30) | |
160 | #define DMA_GCMD_SFL (((u32)1) << 29) | |
161 | #define DMA_GCMD_EAFL (((u32)1) << 28) | |
162 | #define DMA_GCMD_WBF (((u32)1) << 27) | |
2ae21010 SS |
163 | #define DMA_GCMD_QIE (((u32)1) << 26) |
164 | #define DMA_GCMD_SIRTP (((u32)1) << 24) | |
165 | #define DMA_GCMD_IRE (((u32) 1) << 25) | |
ba395927 KA |
166 | |
167 | /* GSTS_REG */ | |
168 | #define DMA_GSTS_TES (((u32)1) << 31) | |
169 | #define DMA_GSTS_RTPS (((u32)1) << 30) | |
170 | #define DMA_GSTS_FLS (((u32)1) << 29) | |
171 | #define DMA_GSTS_AFLS (((u32)1) << 28) | |
172 | #define DMA_GSTS_WBFS (((u32)1) << 27) | |
2ae21010 SS |
173 | #define DMA_GSTS_QIES (((u32)1) << 26) |
174 | #define DMA_GSTS_IRTPS (((u32)1) << 24) | |
175 | #define DMA_GSTS_IRES (((u32)1) << 25) | |
ba395927 KA |
176 | |
177 | /* CCMD_REG */ | |
178 | #define DMA_CCMD_ICC (((u64)1) << 63) | |
179 | #define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61) | |
180 | #define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61) | |
181 | #define DMA_CCMD_DEVICE_INVL (((u64)3) << 61) | |
182 | #define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32) | |
183 | #define DMA_CCMD_MASK_NOBIT 0 | |
184 | #define DMA_CCMD_MASK_1BIT 1 | |
185 | #define DMA_CCMD_MASK_2BIT 2 | |
186 | #define DMA_CCMD_MASK_3BIT 3 | |
187 | #define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16) | |
188 | #define DMA_CCMD_DID(d) ((u64)((d) & 0xffff)) | |
189 | ||
190 | /* FECTL_REG */ | |
191 | #define DMA_FECTL_IM (((u32)1) << 31) | |
192 | ||
193 | /* FSTS_REG */ | |
194 | #define DMA_FSTS_PPF ((u32)2) | |
195 | #define DMA_FSTS_PFO ((u32)1) | |
196 | #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff) | |
197 | ||
198 | /* FRCD_REG, 32 bits access */ | |
199 | #define DMA_FRCD_F (((u32)1) << 31) | |
200 | #define dma_frcd_type(d) ((d >> 30) & 1) | |
201 | #define dma_frcd_fault_reason(c) (c & 0xff) | |
202 | #define dma_frcd_source_id(c) (c & 0xffff) | |
203 | #define dma_frcd_page_addr(d) (d & (((u64)-1) << 12)) /* low 64 bit */ | |
204 | ||
cf1337f0 SS |
205 | #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) /* 10sec */ |
206 | ||
207 | #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \ | |
208 | {\ | |
209 | cycles_t start_time = get_cycles();\ | |
210 | while (1) {\ | |
211 | sts = op (iommu->reg + offset);\ | |
212 | if (cond)\ | |
213 | break;\ | |
214 | if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\ | |
215 | panic("DMAR hardware is malfunctioning\n");\ | |
216 | cpu_relax();\ | |
217 | }\ | |
218 | } | |
219 | ||
fe962e90 SS |
220 | #define QI_LENGTH 256 /* queue length */ |
221 | ||
222 | enum { | |
223 | QI_FREE, | |
224 | QI_IN_USE, | |
225 | QI_DONE | |
226 | }; | |
227 | ||
228 | #define QI_CC_TYPE 0x1 | |
229 | #define QI_IOTLB_TYPE 0x2 | |
230 | #define QI_DIOTLB_TYPE 0x3 | |
231 | #define QI_IEC_TYPE 0x4 | |
232 | #define QI_IWD_TYPE 0x5 | |
233 | ||
234 | #define QI_IEC_SELECTIVE (((u64)1) << 4) | |
235 | #define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32)) | |
236 | #define QI_IEC_IM(m) (((u64)(m & 0x1f) << 27)) | |
237 | ||
238 | #define QI_IWD_STATUS_DATA(d) (((u64)d) << 32) | |
239 | #define QI_IWD_STATUS_WRITE (((u64)1) << 5) | |
240 | ||
241 | struct qi_desc { | |
242 | u64 low, high; | |
243 | }; | |
244 | ||
245 | struct q_inval { | |
246 | spinlock_t q_lock; | |
247 | struct qi_desc *desc; /* invalidation queue */ | |
248 | int *desc_status; /* desc status */ | |
249 | int free_head; /* first free entry */ | |
250 | int free_tail; /* last free entry */ | |
251 | int free_cnt; | |
252 | }; | |
253 | ||
2ae21010 SS |
254 | #ifdef CONFIG_INTR_REMAP |
255 | /* 1MB - maximum possible interrupt remapping table size */ | |
256 | #define INTR_REMAP_PAGE_ORDER 8 | |
257 | #define INTR_REMAP_TABLE_REG_SIZE 0xf | |
258 | ||
b6fcb33a SS |
259 | #define INTR_REMAP_TABLE_ENTRIES 65536 |
260 | ||
2ae21010 SS |
261 | struct ir_table { |
262 | struct irte *base; | |
263 | }; | |
264 | #endif | |
265 | ||
ba395927 KA |
266 | struct intel_iommu { |
267 | void __iomem *reg; /* Pointer to hardware regs, virtual addr */ | |
268 | u64 cap; | |
269 | u64 ecap; | |
ba395927 KA |
270 | int seg; |
271 | u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */ | |
ba395927 | 272 | spinlock_t register_lock; /* protect register handling */ |
c42d9f32 | 273 | int seq_id; /* sequence id of the iommu */ |
e61d98d8 SS |
274 | |
275 | #ifdef CONFIG_DMAR | |
276 | unsigned long *domain_ids; /* bitmap of domains */ | |
277 | struct dmar_domain **domains; /* ptr to domains */ | |
278 | spinlock_t lock; /* protect context, domain ids */ | |
ba395927 KA |
279 | struct root_entry *root_entry; /* virtual address */ |
280 | ||
281 | unsigned int irq; | |
282 | unsigned char name[7]; /* Device Name */ | |
283 | struct msi_msg saved_msg; | |
284 | struct sys_device sysdev; | |
e61d98d8 | 285 | #endif |
fe962e90 | 286 | struct q_inval *qi; /* Queued invalidation info */ |
2ae21010 SS |
287 | #ifdef CONFIG_INTR_REMAP |
288 | struct ir_table *ir_table; /* Interrupt remapping info */ | |
289 | #endif | |
ba395927 KA |
290 | }; |
291 | ||
fe962e90 SS |
292 | static inline void __iommu_flush_cache( |
293 | struct intel_iommu *iommu, void *addr, int size) | |
294 | { | |
295 | if (!ecap_coherent(iommu->ecap)) | |
296 | clflush_cache_range(addr, size); | |
297 | } | |
298 | ||
e61d98d8 SS |
299 | extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev); |
300 | ||
1886e8a9 | 301 | extern int alloc_iommu(struct dmar_drhd_unit *drhd); |
e61d98d8 | 302 | extern void free_iommu(struct intel_iommu *iommu); |
2ae21010 SS |
303 | extern int dmar_enable_qi(struct intel_iommu *iommu); |
304 | extern void qi_global_iec(struct intel_iommu *iommu); | |
e820482c | 305 | |
b6fcb33a | 306 | extern void qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu); |
38717946 KA |
307 | |
308 | void intel_iommu_domain_exit(struct dmar_domain *domain); | |
309 | struct dmar_domain *intel_iommu_domain_alloc(struct pci_dev *pdev); | |
310 | int intel_iommu_context_mapping(struct dmar_domain *domain, | |
311 | struct pci_dev *pdev); | |
312 | int intel_iommu_page_mapping(struct dmar_domain *domain, dma_addr_t iova, | |
313 | u64 hpa, size_t size, int prot); | |
314 | void intel_iommu_detach_dev(struct dmar_domain *domain, u8 bus, u8 devfn); | |
315 | struct dmar_domain *intel_iommu_find_domain(struct pci_dev *pdev); | |
316 | u64 intel_iommu_iova_to_pfn(struct dmar_domain *domain, u64 iova); | |
317 | ||
318 | #ifdef CONFIG_DMAR | |
319 | int intel_iommu_found(void); | |
320 | #else /* CONFIG_DMAR */ | |
321 | static inline int intel_iommu_found(void) | |
322 | { | |
323 | return 0; | |
324 | } | |
325 | #endif /* CONFIG_DMAR */ | |
326 | ||
ba395927 | 327 | #endif |