2 * Copyright (c) 2006, Intel Corporation.
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.
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
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.
17 * Copyright (C) Ashok Raj <ashok.raj@intel.com>
18 * Copyright (C) Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
21 #ifndef _INTEL_IOMMU_H_
22 #define _INTEL_IOMMU_H_
24 #include <linux/types.h>
25 #include <linux/msi.h>
30 * Intel IOMMU register specification per version 1.0 public spec.
33 #define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
34 #define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
35 #define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
36 #define DMAR_GCMD_REG 0x18 /* Global command register */
37 #define DMAR_GSTS_REG 0x1c /* Global status register */
38 #define DMAR_RTADDR_REG 0x20 /* Root entry table */
39 #define DMAR_CCMD_REG 0x28 /* Context command reg */
40 #define DMAR_FSTS_REG 0x34 /* Fault Status register */
41 #define DMAR_FECTL_REG 0x38 /* Fault control register */
42 #define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */
43 #define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */
44 #define DMAR_FEUADDR_REG 0x44 /* Upper address register */
45 #define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */
46 #define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */
47 #define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */
48 #define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */
49 #define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */
50 #define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */
52 #define OFFSET_STRIDE (9)
54 #define dmar_readl(dmar, reg) readl(dmar + reg)
55 #define dmar_readq(dmar, reg) ({ \
57 lo = readl(dmar + reg); \
58 hi = readl(dmar + reg + 4); \
59 (((u64) hi) << 32) + lo; })
61 static inline u64 dmar_readq(void __iomem *addr)
66 return (((u64) hi) << 32) + lo;
69 static inline void dmar_writeq(void __iomem *addr, u64 val)
71 writel((u32)val, addr);
72 writel((u32)(val >> 32), addr + 4);
75 #define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
76 #define DMAR_VER_MINOR(v) ((v) & 0x0f)
79 * Decoding Capability Register
81 #define cap_read_drain(c) (((c) >> 55) & 1)
82 #define cap_write_drain(c) (((c) >> 54) & 1)
83 #define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
84 #define cap_num_fault_regs(c) ((((c) >> 40) & 0xff) + 1)
85 #define cap_pgsel_inv(c) (((c) >> 39) & 1)
87 #define cap_super_page_val(c) (((c) >> 34) & 0xf)
88 #define cap_super_offset(c) (((find_first_bit(&cap_super_page_val(c), 4)) \
89 * OFFSET_STRIDE) + 21)
91 #define cap_fault_reg_offset(c) ((((c) >> 24) & 0x3ff) * 16)
92 #define cap_max_fault_reg_offset(c) \
93 (cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)
95 #define cap_zlr(c) (((c) >> 22) & 1)
96 #define cap_isoch(c) (((c) >> 23) & 1)
97 #define cap_mgaw(c) ((((c) >> 16) & 0x3f) + 1)
98 #define cap_sagaw(c) (((c) >> 8) & 0x1f)
99 #define cap_caching_mode(c) (((c) >> 7) & 1)
100 #define cap_phmr(c) (((c) >> 6) & 1)
101 #define cap_plmr(c) (((c) >> 5) & 1)
102 #define cap_rwbf(c) (((c) >> 4) & 1)
103 #define cap_afl(c) (((c) >> 3) & 1)
104 #define cap_ndoms(c) (((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
106 * Extended Capability Register
109 #define ecap_niotlb_iunits(e) ((((e) >> 24) & 0xff) + 1)
110 #define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
111 #define ecap_max_iotlb_offset(e) \
112 (ecap_iotlb_offset(e) + ecap_niotlb_iunits(e) * 16)
113 #define ecap_coherent(e) ((e) & 0x1)
117 #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
118 #define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
119 #define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
120 #define DMA_TLB_IIRG(type) ((type >> 60) & 7)
121 #define DMA_TLB_IAIG(val) (((val) >> 57) & 7)
122 #define DMA_TLB_READ_DRAIN (((u64)1) << 49)
123 #define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
124 #define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32)
125 #define DMA_TLB_IVT (((u64)1) << 63)
126 #define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
127 #define DMA_TLB_MAX_SIZE (0x3f)
130 #define DMA_GCMD_TE (((u32)1) << 31)
131 #define DMA_GCMD_SRTP (((u32)1) << 30)
132 #define DMA_GCMD_SFL (((u32)1) << 29)
133 #define DMA_GCMD_EAFL (((u32)1) << 28)
134 #define DMA_GCMD_WBF (((u32)1) << 27)
137 #define DMA_GSTS_TES (((u32)1) << 31)
138 #define DMA_GSTS_RTPS (((u32)1) << 30)
139 #define DMA_GSTS_FLS (((u32)1) << 29)
140 #define DMA_GSTS_AFLS (((u32)1) << 28)
141 #define DMA_GSTS_WBFS (((u32)1) << 27)
144 #define DMA_CCMD_ICC (((u64)1) << 63)
145 #define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
146 #define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
147 #define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
148 #define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
149 #define DMA_CCMD_MASK_NOBIT 0
150 #define DMA_CCMD_MASK_1BIT 1
151 #define DMA_CCMD_MASK_2BIT 2
152 #define DMA_CCMD_MASK_3BIT 3
153 #define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
154 #define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))
157 #define DMA_FECTL_IM (((u32)1) << 31)
160 #define DMA_FSTS_PPF ((u32)2)
161 #define DMA_FSTS_PFO ((u32)1)
162 #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)
164 /* FRCD_REG, 32 bits access */
165 #define DMA_FRCD_F (((u32)1) << 31)
166 #define dma_frcd_type(d) ((d >> 30) & 1)
167 #define dma_frcd_fault_reason(c) (c & 0xff)
168 #define dma_frcd_source_id(c) (c & 0xffff)
169 #define dma_frcd_page_addr(d) (d & (((u64)-1) << 12)) /* low 64 bit */
174 * 12-63: Context Ptr (12 - (haw-1))
181 #define ROOT_ENTRY_NR (PAGE_SIZE_4K/sizeof(struct root_entry))
182 static inline bool root_present(struct root_entry *root)
184 return (root->val & 1);
186 static inline void set_root_present(struct root_entry *root)
190 static inline void set_root_value(struct root_entry *root, unsigned long value)
192 root->val |= value & PAGE_MASK_4K;
195 struct context_entry;
196 static inline struct context_entry *
197 get_context_addr_from_root(struct root_entry *root)
199 return (struct context_entry *)
200 (root_present(root)?phys_to_virt(
201 root->val & PAGE_MASK_4K):
208 * 1: fault processing disable
209 * 2-3: translation type
210 * 12-63: address space root
216 struct context_entry {
220 #define context_present(c) ((c).lo & 1)
221 #define context_fault_disable(c) (((c).lo >> 1) & 1)
222 #define context_translation_type(c) (((c).lo >> 2) & 3)
223 #define context_address_root(c) ((c).lo & PAGE_MASK_4K)
224 #define context_address_width(c) ((c).hi & 7)
225 #define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1))
227 #define context_set_present(c) do {(c).lo |= 1;} while (0)
228 #define context_set_fault_enable(c) \
229 do {(c).lo &= (((u64)-1) << 2) | 1;} while (0)
230 #define context_set_translation_type(c, val) \
232 (c).lo &= (((u64)-1) << 4) | 3; \
233 (c).lo |= ((val) & 3) << 2; \
235 #define CONTEXT_TT_MULTI_LEVEL 0
236 #define context_set_address_root(c, val) \
237 do {(c).lo |= (val) & PAGE_MASK_4K;} while (0)
238 #define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0)
239 #define context_set_domain_id(c, val) \
240 do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0)
241 #define context_clear_entry(c) do {(c).lo = 0; (c).hi = 0;} while (0)
249 * 12-63: Host physcial address
254 #define dma_clear_pte(p) do {(p).val = 0;} while (0)
256 #define DMA_PTE_READ (1)
257 #define DMA_PTE_WRITE (2)
259 #define dma_set_pte_readable(p) do {(p).val |= DMA_PTE_READ;} while (0)
260 #define dma_set_pte_writable(p) do {(p).val |= DMA_PTE_WRITE;} while (0)
261 #define dma_set_pte_prot(p, prot) \
262 do {(p).val = ((p).val & ~3) | ((prot) & 3); } while (0)
263 #define dma_pte_addr(p) ((p).val & PAGE_MASK_4K)
264 #define dma_set_pte_addr(p, addr) do {\
265 (p).val |= ((addr) & PAGE_MASK_4K); } while (0)
266 #define dma_pte_present(p) (((p).val & 3) != 0)
271 int id; /* domain id */
272 struct intel_iommu *iommu; /* back pointer to owning iommu */
274 struct list_head devices; /* all devices' list */
275 struct iova_domain iovad; /* iova's that belong to this domain */
277 struct dma_pte *pgd; /* virtual address */
278 spinlock_t mapping_lock; /* page table lock */
279 int gaw; /* max guest address width */
281 /* adjusted guest address width, 0 is level 2 30-bit */
284 #define DOMAIN_FLAG_MULTIPLE_DEVICES 1
288 /* PCI domain-device relationship */
289 struct device_domain_info {
290 struct list_head link; /* link to domain siblings */
291 struct list_head global; /* link to global list */
292 u8 bus; /* PCI bus numer */
293 u8 devfn; /* PCI devfn number */
294 struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
295 struct dmar_domain *domain; /* pointer to domain */
298 extern int init_dmars(void);
301 void __iomem *reg; /* Pointer to hardware regs, virtual addr */
304 unsigned long *domain_ids; /* bitmap of domains */
305 struct dmar_domain **domains; /* ptr to domains */
307 u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
308 spinlock_t lock; /* protect context, domain ids */
309 spinlock_t register_lock; /* protect register handling */
310 struct root_entry *root_entry; /* virtual address */
313 unsigned char name[7]; /* Device Name */
314 struct msi_msg saved_msg;
315 struct sys_device sysdev;
318 #ifndef CONFIG_DMAR_GFX_WA
319 static inline void iommu_prepare_gfx_mapping(void)
323 #endif /* !CONFIG_DMAR_GFX_WA */