Commit | Line | Data |
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f6e2e6b6 | 1 | /* |
5d0d7156 | 2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
f6e2e6b6 JR |
3 | * Author: Joerg Roedel <joerg.roedel@amd.com> |
4 | * Leo Duran <leo.duran@amd.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include <linux/pci.h> | |
21 | #include <linux/acpi.h> | |
f6e2e6b6 | 22 | #include <linux/list.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
f3c6ea1b | 24 | #include <linux/syscore_ops.h> |
a80dc3e0 JR |
25 | #include <linux/interrupt.h> |
26 | #include <linux/msi.h> | |
403f81d8 | 27 | #include <linux/amd-iommu.h> |
400a28a0 | 28 | #include <linux/export.h> |
f6e2e6b6 | 29 | #include <asm/pci-direct.h> |
46a7fa27 | 30 | #include <asm/iommu.h> |
1d9b16d1 | 31 | #include <asm/gart.h> |
ea1b0d39 | 32 | #include <asm/x86_init.h> |
22e6daf4 | 33 | #include <asm/iommu_table.h> |
eb1eb7ae | 34 | #include <asm/io_apic.h> |
6b474b82 | 35 | #include <asm/irq_remapping.h> |
403f81d8 JR |
36 | |
37 | #include "amd_iommu_proto.h" | |
38 | #include "amd_iommu_types.h" | |
05152a04 | 39 | #include "irq_remapping.h" |
403f81d8 | 40 | |
f6e2e6b6 JR |
41 | /* |
42 | * definitions for the ACPI scanning code | |
43 | */ | |
f6e2e6b6 | 44 | #define IVRS_HEADER_LENGTH 48 |
f6e2e6b6 JR |
45 | |
46 | #define ACPI_IVHD_TYPE 0x10 | |
47 | #define ACPI_IVMD_TYPE_ALL 0x20 | |
48 | #define ACPI_IVMD_TYPE 0x21 | |
49 | #define ACPI_IVMD_TYPE_RANGE 0x22 | |
50 | ||
51 | #define IVHD_DEV_ALL 0x01 | |
52 | #define IVHD_DEV_SELECT 0x02 | |
53 | #define IVHD_DEV_SELECT_RANGE_START 0x03 | |
54 | #define IVHD_DEV_RANGE_END 0x04 | |
55 | #define IVHD_DEV_ALIAS 0x42 | |
56 | #define IVHD_DEV_ALIAS_RANGE 0x43 | |
57 | #define IVHD_DEV_EXT_SELECT 0x46 | |
58 | #define IVHD_DEV_EXT_SELECT_RANGE 0x47 | |
6efed63b JR |
59 | #define IVHD_DEV_SPECIAL 0x48 |
60 | ||
61 | #define IVHD_SPECIAL_IOAPIC 1 | |
62 | #define IVHD_SPECIAL_HPET 2 | |
f6e2e6b6 | 63 | |
6da7342f JR |
64 | #define IVHD_FLAG_HT_TUN_EN_MASK 0x01 |
65 | #define IVHD_FLAG_PASSPW_EN_MASK 0x02 | |
66 | #define IVHD_FLAG_RESPASSPW_EN_MASK 0x04 | |
67 | #define IVHD_FLAG_ISOC_EN_MASK 0x08 | |
f6e2e6b6 JR |
68 | |
69 | #define IVMD_FLAG_EXCL_RANGE 0x08 | |
70 | #define IVMD_FLAG_UNITY_MAP 0x01 | |
71 | ||
72 | #define ACPI_DEVFLAG_INITPASS 0x01 | |
73 | #define ACPI_DEVFLAG_EXTINT 0x02 | |
74 | #define ACPI_DEVFLAG_NMI 0x04 | |
75 | #define ACPI_DEVFLAG_SYSMGT1 0x10 | |
76 | #define ACPI_DEVFLAG_SYSMGT2 0x20 | |
77 | #define ACPI_DEVFLAG_LINT0 0x40 | |
78 | #define ACPI_DEVFLAG_LINT1 0x80 | |
79 | #define ACPI_DEVFLAG_ATSDIS 0x10000000 | |
80 | ||
b65233a9 JR |
81 | /* |
82 | * ACPI table definitions | |
83 | * | |
84 | * These data structures are laid over the table to parse the important values | |
85 | * out of it. | |
86 | */ | |
87 | ||
88 | /* | |
89 | * structure describing one IOMMU in the ACPI table. Typically followed by one | |
90 | * or more ivhd_entrys. | |
91 | */ | |
f6e2e6b6 JR |
92 | struct ivhd_header { |
93 | u8 type; | |
94 | u8 flags; | |
95 | u16 length; | |
96 | u16 devid; | |
97 | u16 cap_ptr; | |
98 | u64 mmio_phys; | |
99 | u16 pci_seg; | |
100 | u16 info; | |
30861ddc | 101 | u32 efr; |
f6e2e6b6 JR |
102 | } __attribute__((packed)); |
103 | ||
b65233a9 JR |
104 | /* |
105 | * A device entry describing which devices a specific IOMMU translates and | |
106 | * which requestor ids they use. | |
107 | */ | |
f6e2e6b6 JR |
108 | struct ivhd_entry { |
109 | u8 type; | |
110 | u16 devid; | |
111 | u8 flags; | |
112 | u32 ext; | |
113 | } __attribute__((packed)); | |
114 | ||
b65233a9 JR |
115 | /* |
116 | * An AMD IOMMU memory definition structure. It defines things like exclusion | |
117 | * ranges for devices and regions that should be unity mapped. | |
118 | */ | |
f6e2e6b6 JR |
119 | struct ivmd_header { |
120 | u8 type; | |
121 | u8 flags; | |
122 | u16 length; | |
123 | u16 devid; | |
124 | u16 aux; | |
125 | u64 resv; | |
126 | u64 range_start; | |
127 | u64 range_length; | |
128 | } __attribute__((packed)); | |
129 | ||
fefda117 | 130 | bool amd_iommu_dump; |
05152a04 | 131 | bool amd_iommu_irq_remap __read_mostly; |
fefda117 | 132 | |
02f3b3f5 | 133 | static bool amd_iommu_detected; |
a5235725 | 134 | static bool __initdata amd_iommu_disabled; |
c1cbebee | 135 | |
b65233a9 JR |
136 | u16 amd_iommu_last_bdf; /* largest PCI device id we have |
137 | to handle */ | |
2e22847f | 138 | LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings |
b65233a9 | 139 | we find in ACPI */ |
3775d481 | 140 | u32 amd_iommu_unmap_flush; /* if true, flush on every unmap */ |
928abd25 | 141 | |
2e22847f | 142 | LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the |
b65233a9 | 143 | system */ |
928abd25 | 144 | |
bb52777e JR |
145 | /* Array to assign indices to IOMMUs*/ |
146 | struct amd_iommu *amd_iommus[MAX_IOMMUS]; | |
147 | int amd_iommus_present; | |
148 | ||
318afd41 JR |
149 | /* IOMMUs have a non-present cache? */ |
150 | bool amd_iommu_np_cache __read_mostly; | |
60f723b4 | 151 | bool amd_iommu_iotlb_sup __read_mostly = true; |
318afd41 | 152 | |
62f71abb JR |
153 | u32 amd_iommu_max_pasids __read_mostly = ~0; |
154 | ||
400a28a0 | 155 | bool amd_iommu_v2_present __read_mostly; |
30861ddc | 156 | bool amd_iommu_pc_present __read_mostly; |
400a28a0 | 157 | |
5abcdba4 JR |
158 | bool amd_iommu_force_isolation __read_mostly; |
159 | ||
aeb26f55 JR |
160 | /* |
161 | * List of protection domains - used during resume | |
162 | */ | |
163 | LIST_HEAD(amd_iommu_pd_list); | |
164 | spinlock_t amd_iommu_pd_lock; | |
165 | ||
b65233a9 JR |
166 | /* |
167 | * Pointer to the device table which is shared by all AMD IOMMUs | |
168 | * it is indexed by the PCI device id or the HT unit id and contains | |
169 | * information about the domain the device belongs to as well as the | |
170 | * page table root pointer. | |
171 | */ | |
928abd25 | 172 | struct dev_table_entry *amd_iommu_dev_table; |
b65233a9 JR |
173 | |
174 | /* | |
175 | * The alias table is a driver specific data structure which contains the | |
176 | * mappings of the PCI device ids to the actual requestor ids on the IOMMU. | |
177 | * More than one device can share the same requestor id. | |
178 | */ | |
928abd25 | 179 | u16 *amd_iommu_alias_table; |
b65233a9 JR |
180 | |
181 | /* | |
182 | * The rlookup table is used to find the IOMMU which is responsible | |
183 | * for a specific device. It is also indexed by the PCI device id. | |
184 | */ | |
928abd25 | 185 | struct amd_iommu **amd_iommu_rlookup_table; |
b65233a9 | 186 | |
b65233a9 | 187 | /* |
0ea2c422 JR |
188 | * This table is used to find the irq remapping table for a given device id |
189 | * quickly. | |
190 | */ | |
191 | struct irq_remap_table **irq_lookup_table; | |
192 | ||
b65233a9 | 193 | /* |
df805abb | 194 | * AMD IOMMU allows up to 2^16 different protection domains. This is a bitmap |
b65233a9 JR |
195 | * to know which ones are already in use. |
196 | */ | |
928abd25 JR |
197 | unsigned long *amd_iommu_pd_alloc_bitmap; |
198 | ||
b65233a9 JR |
199 | static u32 dev_table_size; /* size of the device table */ |
200 | static u32 alias_table_size; /* size of the alias table */ | |
201 | static u32 rlookup_table_size; /* size if the rlookup table */ | |
3e8064ba | 202 | |
2c0ae172 JR |
203 | enum iommu_init_state { |
204 | IOMMU_START_STATE, | |
205 | IOMMU_IVRS_DETECTED, | |
206 | IOMMU_ACPI_FINISHED, | |
207 | IOMMU_ENABLED, | |
208 | IOMMU_PCI_INIT, | |
209 | IOMMU_INTERRUPTS_EN, | |
210 | IOMMU_DMA_OPS, | |
211 | IOMMU_INITIALIZED, | |
212 | IOMMU_NOT_FOUND, | |
213 | IOMMU_INIT_ERROR, | |
214 | }; | |
215 | ||
235dacbc JR |
216 | /* Early ioapic and hpet maps from kernel command line */ |
217 | #define EARLY_MAP_SIZE 4 | |
218 | static struct devid_map __initdata early_ioapic_map[EARLY_MAP_SIZE]; | |
219 | static struct devid_map __initdata early_hpet_map[EARLY_MAP_SIZE]; | |
220 | static int __initdata early_ioapic_map_size; | |
221 | static int __initdata early_hpet_map_size; | |
dfbb6d47 | 222 | static bool __initdata cmdline_maps; |
235dacbc | 223 | |
2c0ae172 JR |
224 | static enum iommu_init_state init_state = IOMMU_START_STATE; |
225 | ||
ae295142 | 226 | static int amd_iommu_enable_interrupts(void); |
2c0ae172 | 227 | static int __init iommu_go_to_state(enum iommu_init_state state); |
3d9761e7 | 228 | |
208ec8c9 JR |
229 | static inline void update_last_devid(u16 devid) |
230 | { | |
231 | if (devid > amd_iommu_last_bdf) | |
232 | amd_iommu_last_bdf = devid; | |
233 | } | |
234 | ||
c571484e JR |
235 | static inline unsigned long tbl_size(int entry_size) |
236 | { | |
237 | unsigned shift = PAGE_SHIFT + | |
421f909c | 238 | get_order(((int)amd_iommu_last_bdf + 1) * entry_size); |
c571484e JR |
239 | |
240 | return 1UL << shift; | |
241 | } | |
242 | ||
5bcd757f MG |
243 | /* Access to l1 and l2 indexed register spaces */ |
244 | ||
245 | static u32 iommu_read_l1(struct amd_iommu *iommu, u16 l1, u8 address) | |
246 | { | |
247 | u32 val; | |
248 | ||
249 | pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16)); | |
250 | pci_read_config_dword(iommu->dev, 0xfc, &val); | |
251 | return val; | |
252 | } | |
253 | ||
254 | static void iommu_write_l1(struct amd_iommu *iommu, u16 l1, u8 address, u32 val) | |
255 | { | |
256 | pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16 | 1 << 31)); | |
257 | pci_write_config_dword(iommu->dev, 0xfc, val); | |
258 | pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16)); | |
259 | } | |
260 | ||
261 | static u32 iommu_read_l2(struct amd_iommu *iommu, u8 address) | |
262 | { | |
263 | u32 val; | |
264 | ||
265 | pci_write_config_dword(iommu->dev, 0xf0, address); | |
266 | pci_read_config_dword(iommu->dev, 0xf4, &val); | |
267 | return val; | |
268 | } | |
269 | ||
270 | static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val) | |
271 | { | |
272 | pci_write_config_dword(iommu->dev, 0xf0, (address | 1 << 8)); | |
273 | pci_write_config_dword(iommu->dev, 0xf4, val); | |
274 | } | |
275 | ||
b65233a9 JR |
276 | /**************************************************************************** |
277 | * | |
278 | * AMD IOMMU MMIO register space handling functions | |
279 | * | |
280 | * These functions are used to program the IOMMU device registers in | |
281 | * MMIO space required for that driver. | |
282 | * | |
283 | ****************************************************************************/ | |
3e8064ba | 284 | |
b65233a9 JR |
285 | /* |
286 | * This function set the exclusion range in the IOMMU. DMA accesses to the | |
287 | * exclusion range are passed through untranslated | |
288 | */ | |
05f92db9 | 289 | static void iommu_set_exclusion_range(struct amd_iommu *iommu) |
b2026aa2 JR |
290 | { |
291 | u64 start = iommu->exclusion_start & PAGE_MASK; | |
292 | u64 limit = (start + iommu->exclusion_length) & PAGE_MASK; | |
293 | u64 entry; | |
294 | ||
295 | if (!iommu->exclusion_start) | |
296 | return; | |
297 | ||
298 | entry = start | MMIO_EXCL_ENABLE_MASK; | |
299 | memcpy_toio(iommu->mmio_base + MMIO_EXCL_BASE_OFFSET, | |
300 | &entry, sizeof(entry)); | |
301 | ||
302 | entry = limit; | |
303 | memcpy_toio(iommu->mmio_base + MMIO_EXCL_LIMIT_OFFSET, | |
304 | &entry, sizeof(entry)); | |
305 | } | |
306 | ||
b65233a9 | 307 | /* Programs the physical address of the device table into the IOMMU hardware */ |
6b7f000e | 308 | static void iommu_set_device_table(struct amd_iommu *iommu) |
b2026aa2 | 309 | { |
f609891f | 310 | u64 entry; |
b2026aa2 JR |
311 | |
312 | BUG_ON(iommu->mmio_base == NULL); | |
313 | ||
314 | entry = virt_to_phys(amd_iommu_dev_table); | |
315 | entry |= (dev_table_size >> 12) - 1; | |
316 | memcpy_toio(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET, | |
317 | &entry, sizeof(entry)); | |
318 | } | |
319 | ||
b65233a9 | 320 | /* Generic functions to enable/disable certain features of the IOMMU. */ |
05f92db9 | 321 | static void iommu_feature_enable(struct amd_iommu *iommu, u8 bit) |
b2026aa2 JR |
322 | { |
323 | u32 ctrl; | |
324 | ||
325 | ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET); | |
326 | ctrl |= (1 << bit); | |
327 | writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET); | |
328 | } | |
329 | ||
ca020711 | 330 | static void iommu_feature_disable(struct amd_iommu *iommu, u8 bit) |
b2026aa2 JR |
331 | { |
332 | u32 ctrl; | |
333 | ||
199d0d50 | 334 | ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET); |
b2026aa2 JR |
335 | ctrl &= ~(1 << bit); |
336 | writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET); | |
337 | } | |
338 | ||
1456e9d2 JR |
339 | static void iommu_set_inv_tlb_timeout(struct amd_iommu *iommu, int timeout) |
340 | { | |
341 | u32 ctrl; | |
342 | ||
343 | ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET); | |
344 | ctrl &= ~CTRL_INV_TO_MASK; | |
345 | ctrl |= (timeout << CONTROL_INV_TIMEOUT) & CTRL_INV_TO_MASK; | |
346 | writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET); | |
347 | } | |
348 | ||
b65233a9 | 349 | /* Function to enable the hardware */ |
05f92db9 | 350 | static void iommu_enable(struct amd_iommu *iommu) |
b2026aa2 | 351 | { |
b2026aa2 | 352 | iommu_feature_enable(iommu, CONTROL_IOMMU_EN); |
b2026aa2 JR |
353 | } |
354 | ||
92ac4320 | 355 | static void iommu_disable(struct amd_iommu *iommu) |
126c52be | 356 | { |
a8c485bb CW |
357 | /* Disable command buffer */ |
358 | iommu_feature_disable(iommu, CONTROL_CMDBUF_EN); | |
359 | ||
360 | /* Disable event logging and event interrupts */ | |
361 | iommu_feature_disable(iommu, CONTROL_EVT_INT_EN); | |
362 | iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN); | |
363 | ||
364 | /* Disable IOMMU hardware itself */ | |
92ac4320 | 365 | iommu_feature_disable(iommu, CONTROL_IOMMU_EN); |
126c52be JR |
366 | } |
367 | ||
b65233a9 JR |
368 | /* |
369 | * mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in | |
370 | * the system has one. | |
371 | */ | |
30861ddc | 372 | static u8 __iomem * __init iommu_map_mmio_space(u64 address, u64 end) |
6c56747b | 373 | { |
30861ddc SK |
374 | if (!request_mem_region(address, end, "amd_iommu")) { |
375 | pr_err("AMD-Vi: Can not reserve memory region %llx-%llx for mmio\n", | |
376 | address, end); | |
e82752d8 | 377 | pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n"); |
6c56747b | 378 | return NULL; |
e82752d8 | 379 | } |
6c56747b | 380 | |
30861ddc | 381 | return (u8 __iomem *)ioremap_nocache(address, end); |
6c56747b JR |
382 | } |
383 | ||
384 | static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu) | |
385 | { | |
386 | if (iommu->mmio_base) | |
387 | iounmap(iommu->mmio_base); | |
30861ddc | 388 | release_mem_region(iommu->mmio_phys, iommu->mmio_phys_end); |
6c56747b JR |
389 | } |
390 | ||
b65233a9 JR |
391 | /**************************************************************************** |
392 | * | |
393 | * The functions below belong to the first pass of AMD IOMMU ACPI table | |
394 | * parsing. In this pass we try to find out the highest device id this | |
395 | * code has to handle. Upon this information the size of the shared data | |
396 | * structures is determined later. | |
397 | * | |
398 | ****************************************************************************/ | |
399 | ||
b514e555 JR |
400 | /* |
401 | * This function calculates the length of a given IVHD entry | |
402 | */ | |
403 | static inline int ivhd_entry_length(u8 *ivhd) | |
404 | { | |
405 | return 0x04 << (*ivhd >> 6); | |
406 | } | |
407 | ||
b65233a9 JR |
408 | /* |
409 | * This function reads the last device id the IOMMU has to handle from the PCI | |
410 | * capability header for this IOMMU | |
411 | */ | |
3e8064ba JR |
412 | static int __init find_last_devid_on_pci(int bus, int dev, int fn, int cap_ptr) |
413 | { | |
414 | u32 cap; | |
415 | ||
416 | cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET); | |
6f2729ba | 417 | update_last_devid(PCI_DEVID(MMIO_GET_BUS(cap), MMIO_GET_LD(cap))); |
3e8064ba JR |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
b65233a9 JR |
422 | /* |
423 | * After reading the highest device id from the IOMMU PCI capability header | |
424 | * this function looks if there is a higher device id defined in the ACPI table | |
425 | */ | |
3e8064ba JR |
426 | static int __init find_last_devid_from_ivhd(struct ivhd_header *h) |
427 | { | |
428 | u8 *p = (void *)h, *end = (void *)h; | |
429 | struct ivhd_entry *dev; | |
430 | ||
431 | p += sizeof(*h); | |
432 | end += h->length; | |
433 | ||
c5081cd7 | 434 | find_last_devid_on_pci(PCI_BUS_NUM(h->devid), |
3e8064ba JR |
435 | PCI_SLOT(h->devid), |
436 | PCI_FUNC(h->devid), | |
437 | h->cap_ptr); | |
438 | ||
439 | while (p < end) { | |
440 | dev = (struct ivhd_entry *)p; | |
441 | switch (dev->type) { | |
442 | case IVHD_DEV_SELECT: | |
443 | case IVHD_DEV_RANGE_END: | |
444 | case IVHD_DEV_ALIAS: | |
445 | case IVHD_DEV_EXT_SELECT: | |
b65233a9 | 446 | /* all the above subfield types refer to device ids */ |
208ec8c9 | 447 | update_last_devid(dev->devid); |
3e8064ba JR |
448 | break; |
449 | default: | |
450 | break; | |
451 | } | |
b514e555 | 452 | p += ivhd_entry_length(p); |
3e8064ba JR |
453 | } |
454 | ||
455 | WARN_ON(p != end); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
b65233a9 JR |
460 | /* |
461 | * Iterate over all IVHD entries in the ACPI table and find the highest device | |
462 | * id which we need to handle. This is the first of three functions which parse | |
463 | * the ACPI table. So we check the checksum here. | |
464 | */ | |
3e8064ba JR |
465 | static int __init find_last_devid_acpi(struct acpi_table_header *table) |
466 | { | |
467 | int i; | |
468 | u8 checksum = 0, *p = (u8 *)table, *end = (u8 *)table; | |
469 | struct ivhd_header *h; | |
470 | ||
471 | /* | |
472 | * Validate checksum here so we don't need to do it when | |
473 | * we actually parse the table | |
474 | */ | |
475 | for (i = 0; i < table->length; ++i) | |
476 | checksum += p[i]; | |
02f3b3f5 | 477 | if (checksum != 0) |
3e8064ba | 478 | /* ACPI table corrupt */ |
02f3b3f5 | 479 | return -ENODEV; |
3e8064ba JR |
480 | |
481 | p += IVRS_HEADER_LENGTH; | |
482 | ||
483 | end += table->length; | |
484 | while (p < end) { | |
485 | h = (struct ivhd_header *)p; | |
486 | switch (h->type) { | |
487 | case ACPI_IVHD_TYPE: | |
488 | find_last_devid_from_ivhd(h); | |
489 | break; | |
490 | default: | |
491 | break; | |
492 | } | |
493 | p += h->length; | |
494 | } | |
495 | WARN_ON(p != end); | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
b65233a9 JR |
500 | /**************************************************************************** |
501 | * | |
df805abb | 502 | * The following functions belong to the code path which parses the ACPI table |
b65233a9 JR |
503 | * the second time. In this ACPI parsing iteration we allocate IOMMU specific |
504 | * data structures, initialize the device/alias/rlookup table and also | |
505 | * basically initialize the hardware. | |
506 | * | |
507 | ****************************************************************************/ | |
508 | ||
509 | /* | |
510 | * Allocates the command buffer. This buffer is per AMD IOMMU. We can | |
511 | * write commands to that buffer later and the IOMMU will execute them | |
512 | * asynchronously | |
513 | */ | |
b36ca91e JR |
514 | static u8 * __init alloc_command_buffer(struct amd_iommu *iommu) |
515 | { | |
d0312b21 | 516 | u8 *cmd_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, |
b36ca91e | 517 | get_order(CMD_BUFFER_SIZE)); |
b36ca91e JR |
518 | |
519 | if (cmd_buf == NULL) | |
520 | return NULL; | |
521 | ||
549c90dc | 522 | iommu->cmd_buf_size = CMD_BUFFER_SIZE | CMD_BUFFER_UNINITIALIZED; |
b36ca91e | 523 | |
58492e12 JR |
524 | return cmd_buf; |
525 | } | |
526 | ||
93f1cc67 JR |
527 | /* |
528 | * This function resets the command buffer if the IOMMU stopped fetching | |
529 | * commands from it. | |
530 | */ | |
531 | void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu) | |
532 | { | |
533 | iommu_feature_disable(iommu, CONTROL_CMDBUF_EN); | |
534 | ||
535 | writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); | |
536 | writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); | |
537 | ||
538 | iommu_feature_enable(iommu, CONTROL_CMDBUF_EN); | |
539 | } | |
540 | ||
58492e12 JR |
541 | /* |
542 | * This function writes the command buffer address to the hardware and | |
543 | * enables it. | |
544 | */ | |
545 | static void iommu_enable_command_buffer(struct amd_iommu *iommu) | |
546 | { | |
547 | u64 entry; | |
548 | ||
549 | BUG_ON(iommu->cmd_buf == NULL); | |
550 | ||
551 | entry = (u64)virt_to_phys(iommu->cmd_buf); | |
b36ca91e | 552 | entry |= MMIO_CMD_SIZE_512; |
58492e12 | 553 | |
b36ca91e | 554 | memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET, |
58492e12 | 555 | &entry, sizeof(entry)); |
b36ca91e | 556 | |
93f1cc67 | 557 | amd_iommu_reset_cmd_buffer(iommu); |
549c90dc | 558 | iommu->cmd_buf_size &= ~(CMD_BUFFER_UNINITIALIZED); |
b36ca91e JR |
559 | } |
560 | ||
561 | static void __init free_command_buffer(struct amd_iommu *iommu) | |
562 | { | |
23c1713f | 563 | free_pages((unsigned long)iommu->cmd_buf, |
549c90dc | 564 | get_order(iommu->cmd_buf_size & ~(CMD_BUFFER_UNINITIALIZED))); |
b36ca91e JR |
565 | } |
566 | ||
335503e5 JR |
567 | /* allocates the memory where the IOMMU will log its events to */ |
568 | static u8 * __init alloc_event_buffer(struct amd_iommu *iommu) | |
569 | { | |
335503e5 JR |
570 | iommu->evt_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, |
571 | get_order(EVT_BUFFER_SIZE)); | |
572 | ||
573 | if (iommu->evt_buf == NULL) | |
574 | return NULL; | |
575 | ||
1bc6f838 JR |
576 | iommu->evt_buf_size = EVT_BUFFER_SIZE; |
577 | ||
58492e12 JR |
578 | return iommu->evt_buf; |
579 | } | |
580 | ||
581 | static void iommu_enable_event_buffer(struct amd_iommu *iommu) | |
582 | { | |
583 | u64 entry; | |
584 | ||
585 | BUG_ON(iommu->evt_buf == NULL); | |
586 | ||
335503e5 | 587 | entry = (u64)virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK; |
58492e12 | 588 | |
335503e5 JR |
589 | memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET, |
590 | &entry, sizeof(entry)); | |
591 | ||
09067207 JR |
592 | /* set head and tail to zero manually */ |
593 | writel(0x00, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); | |
594 | writel(0x00, iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); | |
595 | ||
58492e12 | 596 | iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN); |
335503e5 JR |
597 | } |
598 | ||
599 | static void __init free_event_buffer(struct amd_iommu *iommu) | |
600 | { | |
601 | free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE)); | |
602 | } | |
603 | ||
1a29ac01 JR |
604 | /* allocates the memory where the IOMMU will log its events to */ |
605 | static u8 * __init alloc_ppr_log(struct amd_iommu *iommu) | |
606 | { | |
607 | iommu->ppr_log = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, | |
608 | get_order(PPR_LOG_SIZE)); | |
609 | ||
610 | if (iommu->ppr_log == NULL) | |
611 | return NULL; | |
612 | ||
613 | return iommu->ppr_log; | |
614 | } | |
615 | ||
616 | static void iommu_enable_ppr_log(struct amd_iommu *iommu) | |
617 | { | |
618 | u64 entry; | |
619 | ||
620 | if (iommu->ppr_log == NULL) | |
621 | return; | |
622 | ||
623 | entry = (u64)virt_to_phys(iommu->ppr_log) | PPR_LOG_SIZE_512; | |
624 | ||
625 | memcpy_toio(iommu->mmio_base + MMIO_PPR_LOG_OFFSET, | |
626 | &entry, sizeof(entry)); | |
627 | ||
628 | /* set head and tail to zero manually */ | |
629 | writel(0x00, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); | |
630 | writel(0x00, iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); | |
631 | ||
632 | iommu_feature_enable(iommu, CONTROL_PPFLOG_EN); | |
633 | iommu_feature_enable(iommu, CONTROL_PPR_EN); | |
634 | } | |
635 | ||
636 | static void __init free_ppr_log(struct amd_iommu *iommu) | |
637 | { | |
638 | if (iommu->ppr_log == NULL) | |
639 | return; | |
640 | ||
641 | free_pages((unsigned long)iommu->ppr_log, get_order(PPR_LOG_SIZE)); | |
642 | } | |
643 | ||
cbc33a90 JR |
644 | static void iommu_enable_gt(struct amd_iommu *iommu) |
645 | { | |
646 | if (!iommu_feature(iommu, FEATURE_GT)) | |
647 | return; | |
648 | ||
649 | iommu_feature_enable(iommu, CONTROL_GT_EN); | |
650 | } | |
651 | ||
b65233a9 | 652 | /* sets a specific bit in the device table entry. */ |
3566b778 JR |
653 | static void set_dev_entry_bit(u16 devid, u8 bit) |
654 | { | |
ee6c2868 JR |
655 | int i = (bit >> 6) & 0x03; |
656 | int _bit = bit & 0x3f; | |
3566b778 | 657 | |
ee6c2868 | 658 | amd_iommu_dev_table[devid].data[i] |= (1UL << _bit); |
3566b778 JR |
659 | } |
660 | ||
c5cca146 JR |
661 | static int get_dev_entry_bit(u16 devid, u8 bit) |
662 | { | |
ee6c2868 JR |
663 | int i = (bit >> 6) & 0x03; |
664 | int _bit = bit & 0x3f; | |
c5cca146 | 665 | |
ee6c2868 | 666 | return (amd_iommu_dev_table[devid].data[i] & (1UL << _bit)) >> _bit; |
c5cca146 JR |
667 | } |
668 | ||
669 | ||
670 | void amd_iommu_apply_erratum_63(u16 devid) | |
671 | { | |
672 | int sysmgt; | |
673 | ||
674 | sysmgt = get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1) | | |
675 | (get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2) << 1); | |
676 | ||
677 | if (sysmgt == 0x01) | |
678 | set_dev_entry_bit(devid, DEV_ENTRY_IW); | |
679 | } | |
680 | ||
5ff4789d JR |
681 | /* Writes the specific IOMMU for a device into the rlookup table */ |
682 | static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid) | |
683 | { | |
684 | amd_iommu_rlookup_table[devid] = iommu; | |
685 | } | |
686 | ||
b65233a9 JR |
687 | /* |
688 | * This function takes the device specific flags read from the ACPI | |
689 | * table and sets up the device table entry with that information | |
690 | */ | |
5ff4789d JR |
691 | static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu, |
692 | u16 devid, u32 flags, u32 ext_flags) | |
3566b778 JR |
693 | { |
694 | if (flags & ACPI_DEVFLAG_INITPASS) | |
695 | set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS); | |
696 | if (flags & ACPI_DEVFLAG_EXTINT) | |
697 | set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS); | |
698 | if (flags & ACPI_DEVFLAG_NMI) | |
699 | set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS); | |
700 | if (flags & ACPI_DEVFLAG_SYSMGT1) | |
701 | set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1); | |
702 | if (flags & ACPI_DEVFLAG_SYSMGT2) | |
703 | set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2); | |
704 | if (flags & ACPI_DEVFLAG_LINT0) | |
705 | set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS); | |
706 | if (flags & ACPI_DEVFLAG_LINT1) | |
707 | set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS); | |
3566b778 | 708 | |
c5cca146 JR |
709 | amd_iommu_apply_erratum_63(devid); |
710 | ||
5ff4789d | 711 | set_iommu_for_device(iommu, devid); |
3566b778 JR |
712 | } |
713 | ||
31cff67f | 714 | static int __init add_special_device(u8 type, u8 id, u16 devid, bool cmd_line) |
6efed63b JR |
715 | { |
716 | struct devid_map *entry; | |
717 | struct list_head *list; | |
718 | ||
31cff67f JR |
719 | if (type == IVHD_SPECIAL_IOAPIC) |
720 | list = &ioapic_map; | |
721 | else if (type == IVHD_SPECIAL_HPET) | |
722 | list = &hpet_map; | |
723 | else | |
6efed63b JR |
724 | return -EINVAL; |
725 | ||
31cff67f JR |
726 | list_for_each_entry(entry, list, list) { |
727 | if (!(entry->id == id && entry->cmd_line)) | |
728 | continue; | |
729 | ||
730 | pr_info("AMD-Vi: Command-line override present for %s id %d - ignoring\n", | |
731 | type == IVHD_SPECIAL_IOAPIC ? "IOAPIC" : "HPET", id); | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
6efed63b JR |
736 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
737 | if (!entry) | |
738 | return -ENOMEM; | |
739 | ||
31cff67f JR |
740 | entry->id = id; |
741 | entry->devid = devid; | |
742 | entry->cmd_line = cmd_line; | |
6efed63b JR |
743 | |
744 | list_add_tail(&entry->list, list); | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
235dacbc JR |
749 | static int __init add_early_maps(void) |
750 | { | |
751 | int i, ret; | |
752 | ||
753 | for (i = 0; i < early_ioapic_map_size; ++i) { | |
754 | ret = add_special_device(IVHD_SPECIAL_IOAPIC, | |
755 | early_ioapic_map[i].id, | |
756 | early_ioapic_map[i].devid, | |
757 | early_ioapic_map[i].cmd_line); | |
758 | if (ret) | |
759 | return ret; | |
760 | } | |
761 | ||
762 | for (i = 0; i < early_hpet_map_size; ++i) { | |
763 | ret = add_special_device(IVHD_SPECIAL_HPET, | |
764 | early_hpet_map[i].id, | |
765 | early_hpet_map[i].devid, | |
766 | early_hpet_map[i].cmd_line); | |
767 | if (ret) | |
768 | return ret; | |
769 | } | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
b65233a9 | 774 | /* |
df805abb | 775 | * Reads the device exclusion range from ACPI and initializes the IOMMU with |
b65233a9 JR |
776 | * it |
777 | */ | |
3566b778 JR |
778 | static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m) |
779 | { | |
780 | struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; | |
781 | ||
782 | if (!(m->flags & IVMD_FLAG_EXCL_RANGE)) | |
783 | return; | |
784 | ||
785 | if (iommu) { | |
b65233a9 JR |
786 | /* |
787 | * We only can configure exclusion ranges per IOMMU, not | |
788 | * per device. But we can enable the exclusion range per | |
789 | * device. This is done here | |
790 | */ | |
3566b778 JR |
791 | set_dev_entry_bit(m->devid, DEV_ENTRY_EX); |
792 | iommu->exclusion_start = m->range_start; | |
793 | iommu->exclusion_length = m->range_length; | |
794 | } | |
795 | } | |
796 | ||
b65233a9 JR |
797 | /* |
798 | * Takes a pointer to an AMD IOMMU entry in the ACPI table and | |
799 | * initializes the hardware and our data structures with it. | |
800 | */ | |
6efed63b | 801 | static int __init init_iommu_from_acpi(struct amd_iommu *iommu, |
5d0c8e49 JR |
802 | struct ivhd_header *h) |
803 | { | |
804 | u8 *p = (u8 *)h; | |
805 | u8 *end = p, flags = 0; | |
0de66d5b JR |
806 | u16 devid = 0, devid_start = 0, devid_to = 0; |
807 | u32 dev_i, ext_flags = 0; | |
58a3bee5 | 808 | bool alias = false; |
5d0c8e49 | 809 | struct ivhd_entry *e; |
235dacbc JR |
810 | int ret; |
811 | ||
812 | ||
813 | ret = add_early_maps(); | |
814 | if (ret) | |
815 | return ret; | |
5d0c8e49 JR |
816 | |
817 | /* | |
e9bf5197 | 818 | * First save the recommended feature enable bits from ACPI |
5d0c8e49 | 819 | */ |
e9bf5197 | 820 | iommu->acpi_flags = h->flags; |
5d0c8e49 JR |
821 | |
822 | /* | |
823 | * Done. Now parse the device entries | |
824 | */ | |
825 | p += sizeof(struct ivhd_header); | |
826 | end += h->length; | |
827 | ||
42a698f4 | 828 | |
5d0c8e49 JR |
829 | while (p < end) { |
830 | e = (struct ivhd_entry *)p; | |
831 | switch (e->type) { | |
832 | case IVHD_DEV_ALL: | |
42a698f4 JR |
833 | |
834 | DUMP_printk(" DEV_ALL\t\t\t first devid: %02x:%02x.%x" | |
835 | " last device %02x:%02x.%x flags: %02x\n", | |
c5081cd7 | 836 | PCI_BUS_NUM(iommu->first_device), |
42a698f4 JR |
837 | PCI_SLOT(iommu->first_device), |
838 | PCI_FUNC(iommu->first_device), | |
c5081cd7 | 839 | PCI_BUS_NUM(iommu->last_device), |
42a698f4 JR |
840 | PCI_SLOT(iommu->last_device), |
841 | PCI_FUNC(iommu->last_device), | |
842 | e->flags); | |
843 | ||
5d0c8e49 JR |
844 | for (dev_i = iommu->first_device; |
845 | dev_i <= iommu->last_device; ++dev_i) | |
5ff4789d JR |
846 | set_dev_entry_from_acpi(iommu, dev_i, |
847 | e->flags, 0); | |
5d0c8e49 JR |
848 | break; |
849 | case IVHD_DEV_SELECT: | |
42a698f4 JR |
850 | |
851 | DUMP_printk(" DEV_SELECT\t\t\t devid: %02x:%02x.%x " | |
852 | "flags: %02x\n", | |
c5081cd7 | 853 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
854 | PCI_SLOT(e->devid), |
855 | PCI_FUNC(e->devid), | |
856 | e->flags); | |
857 | ||
5d0c8e49 | 858 | devid = e->devid; |
5ff4789d | 859 | set_dev_entry_from_acpi(iommu, devid, e->flags, 0); |
5d0c8e49 JR |
860 | break; |
861 | case IVHD_DEV_SELECT_RANGE_START: | |
42a698f4 JR |
862 | |
863 | DUMP_printk(" DEV_SELECT_RANGE_START\t " | |
864 | "devid: %02x:%02x.%x flags: %02x\n", | |
c5081cd7 | 865 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
866 | PCI_SLOT(e->devid), |
867 | PCI_FUNC(e->devid), | |
868 | e->flags); | |
869 | ||
5d0c8e49 JR |
870 | devid_start = e->devid; |
871 | flags = e->flags; | |
872 | ext_flags = 0; | |
58a3bee5 | 873 | alias = false; |
5d0c8e49 JR |
874 | break; |
875 | case IVHD_DEV_ALIAS: | |
42a698f4 JR |
876 | |
877 | DUMP_printk(" DEV_ALIAS\t\t\t devid: %02x:%02x.%x " | |
878 | "flags: %02x devid_to: %02x:%02x.%x\n", | |
c5081cd7 | 879 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
880 | PCI_SLOT(e->devid), |
881 | PCI_FUNC(e->devid), | |
882 | e->flags, | |
c5081cd7 | 883 | PCI_BUS_NUM(e->ext >> 8), |
42a698f4 JR |
884 | PCI_SLOT(e->ext >> 8), |
885 | PCI_FUNC(e->ext >> 8)); | |
886 | ||
5d0c8e49 JR |
887 | devid = e->devid; |
888 | devid_to = e->ext >> 8; | |
7a6a3a08 | 889 | set_dev_entry_from_acpi(iommu, devid , e->flags, 0); |
7455aab1 | 890 | set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0); |
5d0c8e49 JR |
891 | amd_iommu_alias_table[devid] = devid_to; |
892 | break; | |
893 | case IVHD_DEV_ALIAS_RANGE: | |
42a698f4 JR |
894 | |
895 | DUMP_printk(" DEV_ALIAS_RANGE\t\t " | |
896 | "devid: %02x:%02x.%x flags: %02x " | |
897 | "devid_to: %02x:%02x.%x\n", | |
c5081cd7 | 898 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
899 | PCI_SLOT(e->devid), |
900 | PCI_FUNC(e->devid), | |
901 | e->flags, | |
c5081cd7 | 902 | PCI_BUS_NUM(e->ext >> 8), |
42a698f4 JR |
903 | PCI_SLOT(e->ext >> 8), |
904 | PCI_FUNC(e->ext >> 8)); | |
905 | ||
5d0c8e49 JR |
906 | devid_start = e->devid; |
907 | flags = e->flags; | |
908 | devid_to = e->ext >> 8; | |
909 | ext_flags = 0; | |
58a3bee5 | 910 | alias = true; |
5d0c8e49 JR |
911 | break; |
912 | case IVHD_DEV_EXT_SELECT: | |
42a698f4 JR |
913 | |
914 | DUMP_printk(" DEV_EXT_SELECT\t\t devid: %02x:%02x.%x " | |
915 | "flags: %02x ext: %08x\n", | |
c5081cd7 | 916 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
917 | PCI_SLOT(e->devid), |
918 | PCI_FUNC(e->devid), | |
919 | e->flags, e->ext); | |
920 | ||
5d0c8e49 | 921 | devid = e->devid; |
5ff4789d JR |
922 | set_dev_entry_from_acpi(iommu, devid, e->flags, |
923 | e->ext); | |
5d0c8e49 JR |
924 | break; |
925 | case IVHD_DEV_EXT_SELECT_RANGE: | |
42a698f4 JR |
926 | |
927 | DUMP_printk(" DEV_EXT_SELECT_RANGE\t devid: " | |
928 | "%02x:%02x.%x flags: %02x ext: %08x\n", | |
c5081cd7 | 929 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
930 | PCI_SLOT(e->devid), |
931 | PCI_FUNC(e->devid), | |
932 | e->flags, e->ext); | |
933 | ||
5d0c8e49 JR |
934 | devid_start = e->devid; |
935 | flags = e->flags; | |
936 | ext_flags = e->ext; | |
58a3bee5 | 937 | alias = false; |
5d0c8e49 JR |
938 | break; |
939 | case IVHD_DEV_RANGE_END: | |
42a698f4 JR |
940 | |
941 | DUMP_printk(" DEV_RANGE_END\t\t devid: %02x:%02x.%x\n", | |
c5081cd7 | 942 | PCI_BUS_NUM(e->devid), |
42a698f4 JR |
943 | PCI_SLOT(e->devid), |
944 | PCI_FUNC(e->devid)); | |
945 | ||
5d0c8e49 JR |
946 | devid = e->devid; |
947 | for (dev_i = devid_start; dev_i <= devid; ++dev_i) { | |
7a6a3a08 | 948 | if (alias) { |
5d0c8e49 | 949 | amd_iommu_alias_table[dev_i] = devid_to; |
7a6a3a08 JR |
950 | set_dev_entry_from_acpi(iommu, |
951 | devid_to, flags, ext_flags); | |
952 | } | |
953 | set_dev_entry_from_acpi(iommu, dev_i, | |
954 | flags, ext_flags); | |
5d0c8e49 JR |
955 | } |
956 | break; | |
6efed63b JR |
957 | case IVHD_DEV_SPECIAL: { |
958 | u8 handle, type; | |
959 | const char *var; | |
960 | u16 devid; | |
961 | int ret; | |
962 | ||
963 | handle = e->ext & 0xff; | |
964 | devid = (e->ext >> 8) & 0xffff; | |
965 | type = (e->ext >> 24) & 0xff; | |
966 | ||
967 | if (type == IVHD_SPECIAL_IOAPIC) | |
968 | var = "IOAPIC"; | |
969 | else if (type == IVHD_SPECIAL_HPET) | |
970 | var = "HPET"; | |
971 | else | |
972 | var = "UNKNOWN"; | |
973 | ||
974 | DUMP_printk(" DEV_SPECIAL(%s[%d])\t\tdevid: %02x:%02x.%x\n", | |
975 | var, (int)handle, | |
c5081cd7 | 976 | PCI_BUS_NUM(devid), |
6efed63b JR |
977 | PCI_SLOT(devid), |
978 | PCI_FUNC(devid)); | |
979 | ||
980 | set_dev_entry_from_acpi(iommu, devid, e->flags, 0); | |
31cff67f | 981 | ret = add_special_device(type, handle, devid, false); |
6efed63b JR |
982 | if (ret) |
983 | return ret; | |
984 | break; | |
985 | } | |
5d0c8e49 JR |
986 | default: |
987 | break; | |
988 | } | |
989 | ||
b514e555 | 990 | p += ivhd_entry_length(p); |
5d0c8e49 | 991 | } |
6efed63b JR |
992 | |
993 | return 0; | |
5d0c8e49 JR |
994 | } |
995 | ||
b65233a9 | 996 | /* Initializes the device->iommu mapping for the driver */ |
5d0c8e49 JR |
997 | static int __init init_iommu_devices(struct amd_iommu *iommu) |
998 | { | |
0de66d5b | 999 | u32 i; |
5d0c8e49 JR |
1000 | |
1001 | for (i = iommu->first_device; i <= iommu->last_device; ++i) | |
1002 | set_iommu_for_device(iommu, i); | |
1003 | ||
1004 | return 0; | |
1005 | } | |
1006 | ||
e47d402d JR |
1007 | static void __init free_iommu_one(struct amd_iommu *iommu) |
1008 | { | |
1009 | free_command_buffer(iommu); | |
335503e5 | 1010 | free_event_buffer(iommu); |
1a29ac01 | 1011 | free_ppr_log(iommu); |
e47d402d JR |
1012 | iommu_unmap_mmio_space(iommu); |
1013 | } | |
1014 | ||
1015 | static void __init free_iommu_all(void) | |
1016 | { | |
1017 | struct amd_iommu *iommu, *next; | |
1018 | ||
3bd22172 | 1019 | for_each_iommu_safe(iommu, next) { |
e47d402d JR |
1020 | list_del(&iommu->list); |
1021 | free_iommu_one(iommu); | |
1022 | kfree(iommu); | |
1023 | } | |
1024 | } | |
1025 | ||
318fe782 SS |
1026 | /* |
1027 | * Family15h Model 10h-1fh erratum 746 (IOMMU Logging May Stall Translations) | |
1028 | * Workaround: | |
1029 | * BIOS should disable L2B micellaneous clock gating by setting | |
1030 | * L2_L2B_CK_GATE_CONTROL[CKGateL2BMiscDisable](D0F2xF4_x90[2]) = 1b | |
1031 | */ | |
e2f1a3bd | 1032 | static void amd_iommu_erratum_746_workaround(struct amd_iommu *iommu) |
318fe782 SS |
1033 | { |
1034 | u32 value; | |
1035 | ||
1036 | if ((boot_cpu_data.x86 != 0x15) || | |
1037 | (boot_cpu_data.x86_model < 0x10) || | |
1038 | (boot_cpu_data.x86_model > 0x1f)) | |
1039 | return; | |
1040 | ||
1041 | pci_write_config_dword(iommu->dev, 0xf0, 0x90); | |
1042 | pci_read_config_dword(iommu->dev, 0xf4, &value); | |
1043 | ||
1044 | if (value & BIT(2)) | |
1045 | return; | |
1046 | ||
1047 | /* Select NB indirect register 0x90 and enable writing */ | |
1048 | pci_write_config_dword(iommu->dev, 0xf0, 0x90 | (1 << 8)); | |
1049 | ||
1050 | pci_write_config_dword(iommu->dev, 0xf4, value | 0x4); | |
1051 | pr_info("AMD-Vi: Applying erratum 746 workaround for IOMMU at %s\n", | |
1052 | dev_name(&iommu->dev->dev)); | |
1053 | ||
1054 | /* Clear the enable writing bit */ | |
1055 | pci_write_config_dword(iommu->dev, 0xf0, 0x90); | |
1056 | } | |
1057 | ||
b65233a9 JR |
1058 | /* |
1059 | * This function clues the initialization function for one IOMMU | |
1060 | * together and also allocates the command buffer and programs the | |
1061 | * hardware. It does NOT enable the IOMMU. This is done afterwards. | |
1062 | */ | |
e47d402d JR |
1063 | static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h) |
1064 | { | |
6efed63b JR |
1065 | int ret; |
1066 | ||
e47d402d | 1067 | spin_lock_init(&iommu->lock); |
bb52777e JR |
1068 | |
1069 | /* Add IOMMU to internal data structures */ | |
e47d402d | 1070 | list_add_tail(&iommu->list, &amd_iommu_list); |
bb52777e JR |
1071 | iommu->index = amd_iommus_present++; |
1072 | ||
1073 | if (unlikely(iommu->index >= MAX_IOMMUS)) { | |
1074 | WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n"); | |
1075 | return -ENOSYS; | |
1076 | } | |
1077 | ||
1078 | /* Index is fine - add IOMMU to the array */ | |
1079 | amd_iommus[iommu->index] = iommu; | |
e47d402d JR |
1080 | |
1081 | /* | |
1082 | * Copy data from ACPI table entry to the iommu struct | |
1083 | */ | |
23c742db | 1084 | iommu->devid = h->devid; |
e47d402d | 1085 | iommu->cap_ptr = h->cap_ptr; |
ee893c24 | 1086 | iommu->pci_seg = h->pci_seg; |
e47d402d | 1087 | iommu->mmio_phys = h->mmio_phys; |
30861ddc SK |
1088 | |
1089 | /* Check if IVHD EFR contains proper max banks/counters */ | |
1090 | if ((h->efr != 0) && | |
1091 | ((h->efr & (0xF << 13)) != 0) && | |
1092 | ((h->efr & (0x3F << 17)) != 0)) { | |
1093 | iommu->mmio_phys_end = MMIO_REG_END_OFFSET; | |
1094 | } else { | |
1095 | iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET; | |
1096 | } | |
1097 | ||
1098 | iommu->mmio_base = iommu_map_mmio_space(iommu->mmio_phys, | |
1099 | iommu->mmio_phys_end); | |
e47d402d JR |
1100 | if (!iommu->mmio_base) |
1101 | return -ENOMEM; | |
1102 | ||
e47d402d JR |
1103 | iommu->cmd_buf = alloc_command_buffer(iommu); |
1104 | if (!iommu->cmd_buf) | |
1105 | return -ENOMEM; | |
1106 | ||
335503e5 JR |
1107 | iommu->evt_buf = alloc_event_buffer(iommu); |
1108 | if (!iommu->evt_buf) | |
1109 | return -ENOMEM; | |
1110 | ||
a80dc3e0 JR |
1111 | iommu->int_enabled = false; |
1112 | ||
6efed63b JR |
1113 | ret = init_iommu_from_acpi(iommu, h); |
1114 | if (ret) | |
1115 | return ret; | |
f6fec00a JR |
1116 | |
1117 | /* | |
1118 | * Make sure IOMMU is not considered to translate itself. The IVRS | |
1119 | * table tells us so, but this is a lie! | |
1120 | */ | |
1121 | amd_iommu_rlookup_table[iommu->devid] = NULL; | |
1122 | ||
e47d402d JR |
1123 | init_iommu_devices(iommu); |
1124 | ||
23c742db | 1125 | return 0; |
e47d402d JR |
1126 | } |
1127 | ||
b65233a9 JR |
1128 | /* |
1129 | * Iterates over all IOMMU entries in the ACPI table, allocates the | |
1130 | * IOMMU structure and initializes it with init_iommu_one() | |
1131 | */ | |
e47d402d JR |
1132 | static int __init init_iommu_all(struct acpi_table_header *table) |
1133 | { | |
1134 | u8 *p = (u8 *)table, *end = (u8 *)table; | |
1135 | struct ivhd_header *h; | |
1136 | struct amd_iommu *iommu; | |
1137 | int ret; | |
1138 | ||
e47d402d JR |
1139 | end += table->length; |
1140 | p += IVRS_HEADER_LENGTH; | |
1141 | ||
1142 | while (p < end) { | |
1143 | h = (struct ivhd_header *)p; | |
1144 | switch (*p) { | |
1145 | case ACPI_IVHD_TYPE: | |
9c72041f | 1146 | |
ae908c22 | 1147 | DUMP_printk("device: %02x:%02x.%01x cap: %04x " |
9c72041f | 1148 | "seg: %d flags: %01x info %04x\n", |
c5081cd7 | 1149 | PCI_BUS_NUM(h->devid), PCI_SLOT(h->devid), |
9c72041f JR |
1150 | PCI_FUNC(h->devid), h->cap_ptr, |
1151 | h->pci_seg, h->flags, h->info); | |
1152 | DUMP_printk(" mmio-addr: %016llx\n", | |
1153 | h->mmio_phys); | |
1154 | ||
e47d402d | 1155 | iommu = kzalloc(sizeof(struct amd_iommu), GFP_KERNEL); |
02f3b3f5 JR |
1156 | if (iommu == NULL) |
1157 | return -ENOMEM; | |
3551a708 | 1158 | |
e47d402d | 1159 | ret = init_iommu_one(iommu, h); |
02f3b3f5 JR |
1160 | if (ret) |
1161 | return ret; | |
e47d402d JR |
1162 | break; |
1163 | default: | |
1164 | break; | |
1165 | } | |
1166 | p += h->length; | |
1167 | ||
1168 | } | |
1169 | WARN_ON(p != end); | |
1170 | ||
1171 | return 0; | |
1172 | } | |
1173 | ||
30861ddc SK |
1174 | |
1175 | static void init_iommu_perf_ctr(struct amd_iommu *iommu) | |
1176 | { | |
1177 | u64 val = 0xabcd, val2 = 0; | |
1178 | ||
1179 | if (!iommu_feature(iommu, FEATURE_PC)) | |
1180 | return; | |
1181 | ||
1182 | amd_iommu_pc_present = true; | |
1183 | ||
1184 | /* Check if the performance counters can be written to */ | |
1185 | if ((0 != amd_iommu_pc_get_set_reg_val(0, 0, 0, 0, &val, true)) || | |
1186 | (0 != amd_iommu_pc_get_set_reg_val(0, 0, 0, 0, &val2, false)) || | |
1187 | (val != val2)) { | |
1188 | pr_err("AMD-Vi: Unable to write to IOMMU perf counter.\n"); | |
1189 | amd_iommu_pc_present = false; | |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | pr_info("AMD-Vi: IOMMU performance counters supported\n"); | |
1194 | ||
1195 | val = readl(iommu->mmio_base + MMIO_CNTR_CONF_OFFSET); | |
1196 | iommu->max_banks = (u8) ((val >> 12) & 0x3f); | |
1197 | iommu->max_counters = (u8) ((val >> 7) & 0xf); | |
1198 | } | |
1199 | ||
1200 | ||
23c742db JR |
1201 | static int iommu_init_pci(struct amd_iommu *iommu) |
1202 | { | |
1203 | int cap_ptr = iommu->cap_ptr; | |
1204 | u32 range, misc, low, high; | |
1205 | ||
c5081cd7 | 1206 | iommu->dev = pci_get_bus_and_slot(PCI_BUS_NUM(iommu->devid), |
23c742db JR |
1207 | iommu->devid & 0xff); |
1208 | if (!iommu->dev) | |
1209 | return -ENODEV; | |
1210 | ||
1211 | pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET, | |
1212 | &iommu->cap); | |
1213 | pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET, | |
1214 | &range); | |
1215 | pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET, | |
1216 | &misc); | |
1217 | ||
6f2729ba | 1218 | iommu->first_device = PCI_DEVID(MMIO_GET_BUS(range), |
23c742db | 1219 | MMIO_GET_FD(range)); |
6f2729ba | 1220 | iommu->last_device = PCI_DEVID(MMIO_GET_BUS(range), |
23c742db JR |
1221 | MMIO_GET_LD(range)); |
1222 | ||
1223 | if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB))) | |
1224 | amd_iommu_iotlb_sup = false; | |
1225 | ||
1226 | /* read extended feature bits */ | |
1227 | low = readl(iommu->mmio_base + MMIO_EXT_FEATURES); | |
1228 | high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4); | |
1229 | ||
1230 | iommu->features = ((u64)high << 32) | low; | |
1231 | ||
1232 | if (iommu_feature(iommu, FEATURE_GT)) { | |
1233 | int glxval; | |
1234 | u32 pasids; | |
1235 | u64 shift; | |
1236 | ||
1237 | shift = iommu->features & FEATURE_PASID_MASK; | |
1238 | shift >>= FEATURE_PASID_SHIFT; | |
1239 | pasids = (1 << shift); | |
1240 | ||
1241 | amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids); | |
1242 | ||
1243 | glxval = iommu->features & FEATURE_GLXVAL_MASK; | |
1244 | glxval >>= FEATURE_GLXVAL_SHIFT; | |
1245 | ||
1246 | if (amd_iommu_max_glx_val == -1) | |
1247 | amd_iommu_max_glx_val = glxval; | |
1248 | else | |
1249 | amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval); | |
1250 | } | |
1251 | ||
1252 | if (iommu_feature(iommu, FEATURE_GT) && | |
1253 | iommu_feature(iommu, FEATURE_PPR)) { | |
1254 | iommu->is_iommu_v2 = true; | |
1255 | amd_iommu_v2_present = true; | |
1256 | } | |
1257 | ||
1258 | if (iommu_feature(iommu, FEATURE_PPR)) { | |
1259 | iommu->ppr_log = alloc_ppr_log(iommu); | |
1260 | if (!iommu->ppr_log) | |
1261 | return -ENOMEM; | |
1262 | } | |
1263 | ||
1264 | if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE)) | |
1265 | amd_iommu_np_cache = true; | |
1266 | ||
30861ddc SK |
1267 | init_iommu_perf_ctr(iommu); |
1268 | ||
23c742db JR |
1269 | if (is_rd890_iommu(iommu->dev)) { |
1270 | int i, j; | |
1271 | ||
1272 | iommu->root_pdev = pci_get_bus_and_slot(iommu->dev->bus->number, | |
1273 | PCI_DEVFN(0, 0)); | |
1274 | ||
1275 | /* | |
1276 | * Some rd890 systems may not be fully reconfigured by the | |
1277 | * BIOS, so it's necessary for us to store this information so | |
1278 | * it can be reprogrammed on resume | |
1279 | */ | |
1280 | pci_read_config_dword(iommu->dev, iommu->cap_ptr + 4, | |
1281 | &iommu->stored_addr_lo); | |
1282 | pci_read_config_dword(iommu->dev, iommu->cap_ptr + 8, | |
1283 | &iommu->stored_addr_hi); | |
1284 | ||
1285 | /* Low bit locks writes to configuration space */ | |
1286 | iommu->stored_addr_lo &= ~1; | |
1287 | ||
1288 | for (i = 0; i < 6; i++) | |
1289 | for (j = 0; j < 0x12; j++) | |
1290 | iommu->stored_l1[i][j] = iommu_read_l1(iommu, i, j); | |
1291 | ||
1292 | for (i = 0; i < 0x83; i++) | |
1293 | iommu->stored_l2[i] = iommu_read_l2(iommu, i); | |
1294 | } | |
1295 | ||
318fe782 SS |
1296 | amd_iommu_erratum_746_workaround(iommu); |
1297 | ||
23c742db JR |
1298 | return pci_enable_device(iommu->dev); |
1299 | } | |
1300 | ||
4d121c32 JR |
1301 | static void print_iommu_info(void) |
1302 | { | |
1303 | static const char * const feat_str[] = { | |
1304 | "PreF", "PPR", "X2APIC", "NX", "GT", "[5]", | |
1305 | "IA", "GA", "HE", "PC" | |
1306 | }; | |
1307 | struct amd_iommu *iommu; | |
1308 | ||
1309 | for_each_iommu(iommu) { | |
1310 | int i; | |
1311 | ||
1312 | pr_info("AMD-Vi: Found IOMMU at %s cap 0x%hx\n", | |
1313 | dev_name(&iommu->dev->dev), iommu->cap_ptr); | |
1314 | ||
1315 | if (iommu->cap & (1 << IOMMU_CAP_EFR)) { | |
1316 | pr_info("AMD-Vi: Extended features: "); | |
2bd5ed00 | 1317 | for (i = 0; i < ARRAY_SIZE(feat_str); ++i) { |
4d121c32 JR |
1318 | if (iommu_feature(iommu, (1ULL << i))) |
1319 | pr_cont(" %s", feat_str[i]); | |
1320 | } | |
30861ddc | 1321 | pr_cont("\n"); |
500c25ed | 1322 | } |
4d121c32 | 1323 | } |
ebe60bbf JR |
1324 | if (irq_remapping_enabled) |
1325 | pr_info("AMD-Vi: Interrupt remapping enabled\n"); | |
4d121c32 JR |
1326 | } |
1327 | ||
2c0ae172 | 1328 | static int __init amd_iommu_init_pci(void) |
23c742db JR |
1329 | { |
1330 | struct amd_iommu *iommu; | |
1331 | int ret = 0; | |
1332 | ||
1333 | for_each_iommu(iommu) { | |
1334 | ret = iommu_init_pci(iommu); | |
1335 | if (ret) | |
1336 | break; | |
1337 | } | |
1338 | ||
23c742db JR |
1339 | ret = amd_iommu_init_devices(); |
1340 | ||
4d121c32 JR |
1341 | print_iommu_info(); |
1342 | ||
23c742db JR |
1343 | return ret; |
1344 | } | |
1345 | ||
a80dc3e0 JR |
1346 | /**************************************************************************** |
1347 | * | |
1348 | * The following functions initialize the MSI interrupts for all IOMMUs | |
df805abb | 1349 | * in the system. It's a bit challenging because there could be multiple |
a80dc3e0 JR |
1350 | * IOMMUs per PCI BDF but we can call pci_enable_msi(x) only once per |
1351 | * pci_dev. | |
1352 | * | |
1353 | ****************************************************************************/ | |
1354 | ||
9f800de3 | 1355 | static int iommu_setup_msi(struct amd_iommu *iommu) |
a80dc3e0 JR |
1356 | { |
1357 | int r; | |
a80dc3e0 | 1358 | |
9ddd592a JR |
1359 | r = pci_enable_msi(iommu->dev); |
1360 | if (r) | |
1361 | return r; | |
a80dc3e0 | 1362 | |
72fe00f0 JR |
1363 | r = request_threaded_irq(iommu->dev->irq, |
1364 | amd_iommu_int_handler, | |
1365 | amd_iommu_int_thread, | |
1366 | 0, "AMD-Vi", | |
3f398bc7 | 1367 | iommu); |
a80dc3e0 JR |
1368 | |
1369 | if (r) { | |
1370 | pci_disable_msi(iommu->dev); | |
9ddd592a | 1371 | return r; |
a80dc3e0 JR |
1372 | } |
1373 | ||
fab6afa3 | 1374 | iommu->int_enabled = true; |
1a29ac01 | 1375 | |
a80dc3e0 JR |
1376 | return 0; |
1377 | } | |
1378 | ||
05f92db9 | 1379 | static int iommu_init_msi(struct amd_iommu *iommu) |
a80dc3e0 | 1380 | { |
9ddd592a JR |
1381 | int ret; |
1382 | ||
a80dc3e0 | 1383 | if (iommu->int_enabled) |
9ddd592a | 1384 | goto enable_faults; |
a80dc3e0 | 1385 | |
82fcfc67 | 1386 | if (iommu->dev->msi_cap) |
9ddd592a JR |
1387 | ret = iommu_setup_msi(iommu); |
1388 | else | |
1389 | ret = -ENODEV; | |
1390 | ||
1391 | if (ret) | |
1392 | return ret; | |
a80dc3e0 | 1393 | |
9ddd592a JR |
1394 | enable_faults: |
1395 | iommu_feature_enable(iommu, CONTROL_EVT_INT_EN); | |
a80dc3e0 | 1396 | |
9ddd592a JR |
1397 | if (iommu->ppr_log != NULL) |
1398 | iommu_feature_enable(iommu, CONTROL_PPFINT_EN); | |
1399 | ||
1400 | return 0; | |
a80dc3e0 JR |
1401 | } |
1402 | ||
b65233a9 JR |
1403 | /**************************************************************************** |
1404 | * | |
1405 | * The next functions belong to the third pass of parsing the ACPI | |
1406 | * table. In this last pass the memory mapping requirements are | |
df805abb | 1407 | * gathered (like exclusion and unity mapping ranges). |
b65233a9 JR |
1408 | * |
1409 | ****************************************************************************/ | |
1410 | ||
be2a022c JR |
1411 | static void __init free_unity_maps(void) |
1412 | { | |
1413 | struct unity_map_entry *entry, *next; | |
1414 | ||
1415 | list_for_each_entry_safe(entry, next, &amd_iommu_unity_map, list) { | |
1416 | list_del(&entry->list); | |
1417 | kfree(entry); | |
1418 | } | |
1419 | } | |
1420 | ||
b65233a9 | 1421 | /* called when we find an exclusion range definition in ACPI */ |
be2a022c JR |
1422 | static int __init init_exclusion_range(struct ivmd_header *m) |
1423 | { | |
1424 | int i; | |
1425 | ||
1426 | switch (m->type) { | |
1427 | case ACPI_IVMD_TYPE: | |
1428 | set_device_exclusion_range(m->devid, m); | |
1429 | break; | |
1430 | case ACPI_IVMD_TYPE_ALL: | |
3a61ec38 | 1431 | for (i = 0; i <= amd_iommu_last_bdf; ++i) |
be2a022c JR |
1432 | set_device_exclusion_range(i, m); |
1433 | break; | |
1434 | case ACPI_IVMD_TYPE_RANGE: | |
1435 | for (i = m->devid; i <= m->aux; ++i) | |
1436 | set_device_exclusion_range(i, m); | |
1437 | break; | |
1438 | default: | |
1439 | break; | |
1440 | } | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
b65233a9 | 1445 | /* called for unity map ACPI definition */ |
be2a022c JR |
1446 | static int __init init_unity_map_range(struct ivmd_header *m) |
1447 | { | |
98f1ad25 | 1448 | struct unity_map_entry *e = NULL; |
02acc43a | 1449 | char *s; |
be2a022c JR |
1450 | |
1451 | e = kzalloc(sizeof(*e), GFP_KERNEL); | |
1452 | if (e == NULL) | |
1453 | return -ENOMEM; | |
1454 | ||
1455 | switch (m->type) { | |
1456 | default: | |
0bc252f4 JR |
1457 | kfree(e); |
1458 | return 0; | |
be2a022c | 1459 | case ACPI_IVMD_TYPE: |
02acc43a | 1460 | s = "IVMD_TYPEi\t\t\t"; |
be2a022c JR |
1461 | e->devid_start = e->devid_end = m->devid; |
1462 | break; | |
1463 | case ACPI_IVMD_TYPE_ALL: | |
02acc43a | 1464 | s = "IVMD_TYPE_ALL\t\t"; |
be2a022c JR |
1465 | e->devid_start = 0; |
1466 | e->devid_end = amd_iommu_last_bdf; | |
1467 | break; | |
1468 | case ACPI_IVMD_TYPE_RANGE: | |
02acc43a | 1469 | s = "IVMD_TYPE_RANGE\t\t"; |
be2a022c JR |
1470 | e->devid_start = m->devid; |
1471 | e->devid_end = m->aux; | |
1472 | break; | |
1473 | } | |
1474 | e->address_start = PAGE_ALIGN(m->range_start); | |
1475 | e->address_end = e->address_start + PAGE_ALIGN(m->range_length); | |
1476 | e->prot = m->flags >> 1; | |
1477 | ||
02acc43a JR |
1478 | DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x" |
1479 | " range_start: %016llx range_end: %016llx flags: %x\n", s, | |
c5081cd7 SK |
1480 | PCI_BUS_NUM(e->devid_start), PCI_SLOT(e->devid_start), |
1481 | PCI_FUNC(e->devid_start), PCI_BUS_NUM(e->devid_end), | |
02acc43a JR |
1482 | PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end), |
1483 | e->address_start, e->address_end, m->flags); | |
1484 | ||
be2a022c JR |
1485 | list_add_tail(&e->list, &amd_iommu_unity_map); |
1486 | ||
1487 | return 0; | |
1488 | } | |
1489 | ||
b65233a9 | 1490 | /* iterates over all memory definitions we find in the ACPI table */ |
be2a022c JR |
1491 | static int __init init_memory_definitions(struct acpi_table_header *table) |
1492 | { | |
1493 | u8 *p = (u8 *)table, *end = (u8 *)table; | |
1494 | struct ivmd_header *m; | |
1495 | ||
be2a022c JR |
1496 | end += table->length; |
1497 | p += IVRS_HEADER_LENGTH; | |
1498 | ||
1499 | while (p < end) { | |
1500 | m = (struct ivmd_header *)p; | |
1501 | if (m->flags & IVMD_FLAG_EXCL_RANGE) | |
1502 | init_exclusion_range(m); | |
1503 | else if (m->flags & IVMD_FLAG_UNITY_MAP) | |
1504 | init_unity_map_range(m); | |
1505 | ||
1506 | p += m->length; | |
1507 | } | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
9f5f5fb3 JR |
1512 | /* |
1513 | * Init the device table to not allow DMA access for devices and | |
1514 | * suppress all page faults | |
1515 | */ | |
33f28c59 | 1516 | static void init_device_table_dma(void) |
9f5f5fb3 | 1517 | { |
0de66d5b | 1518 | u32 devid; |
9f5f5fb3 JR |
1519 | |
1520 | for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) { | |
1521 | set_dev_entry_bit(devid, DEV_ENTRY_VALID); | |
1522 | set_dev_entry_bit(devid, DEV_ENTRY_TRANSLATION); | |
9f5f5fb3 JR |
1523 | } |
1524 | } | |
1525 | ||
d04e0ba3 JR |
1526 | static void __init uninit_device_table_dma(void) |
1527 | { | |
1528 | u32 devid; | |
1529 | ||
1530 | for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) { | |
1531 | amd_iommu_dev_table[devid].data[0] = 0ULL; | |
1532 | amd_iommu_dev_table[devid].data[1] = 0ULL; | |
1533 | } | |
1534 | } | |
1535 | ||
33f28c59 JR |
1536 | static void init_device_table(void) |
1537 | { | |
1538 | u32 devid; | |
1539 | ||
1540 | if (!amd_iommu_irq_remap) | |
1541 | return; | |
1542 | ||
1543 | for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) | |
1544 | set_dev_entry_bit(devid, DEV_ENTRY_IRQ_TBL_EN); | |
1545 | } | |
1546 | ||
e9bf5197 JR |
1547 | static void iommu_init_flags(struct amd_iommu *iommu) |
1548 | { | |
1549 | iommu->acpi_flags & IVHD_FLAG_HT_TUN_EN_MASK ? | |
1550 | iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) : | |
1551 | iommu_feature_disable(iommu, CONTROL_HT_TUN_EN); | |
1552 | ||
1553 | iommu->acpi_flags & IVHD_FLAG_PASSPW_EN_MASK ? | |
1554 | iommu_feature_enable(iommu, CONTROL_PASSPW_EN) : | |
1555 | iommu_feature_disable(iommu, CONTROL_PASSPW_EN); | |
1556 | ||
1557 | iommu->acpi_flags & IVHD_FLAG_RESPASSPW_EN_MASK ? | |
1558 | iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) : | |
1559 | iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN); | |
1560 | ||
1561 | iommu->acpi_flags & IVHD_FLAG_ISOC_EN_MASK ? | |
1562 | iommu_feature_enable(iommu, CONTROL_ISOC_EN) : | |
1563 | iommu_feature_disable(iommu, CONTROL_ISOC_EN); | |
1564 | ||
1565 | /* | |
1566 | * make IOMMU memory accesses cache coherent | |
1567 | */ | |
1568 | iommu_feature_enable(iommu, CONTROL_COHERENT_EN); | |
1456e9d2 JR |
1569 | |
1570 | /* Set IOTLB invalidation timeout to 1s */ | |
1571 | iommu_set_inv_tlb_timeout(iommu, CTRL_INV_TO_1S); | |
e9bf5197 JR |
1572 | } |
1573 | ||
5bcd757f | 1574 | static void iommu_apply_resume_quirks(struct amd_iommu *iommu) |
4c894f47 | 1575 | { |
5bcd757f MG |
1576 | int i, j; |
1577 | u32 ioc_feature_control; | |
c1bf94ec | 1578 | struct pci_dev *pdev = iommu->root_pdev; |
5bcd757f MG |
1579 | |
1580 | /* RD890 BIOSes may not have completely reconfigured the iommu */ | |
c1bf94ec | 1581 | if (!is_rd890_iommu(iommu->dev) || !pdev) |
5bcd757f MG |
1582 | return; |
1583 | ||
1584 | /* | |
1585 | * First, we need to ensure that the iommu is enabled. This is | |
1586 | * controlled by a register in the northbridge | |
1587 | */ | |
5bcd757f MG |
1588 | |
1589 | /* Select Northbridge indirect register 0x75 and enable writing */ | |
1590 | pci_write_config_dword(pdev, 0x60, 0x75 | (1 << 7)); | |
1591 | pci_read_config_dword(pdev, 0x64, &ioc_feature_control); | |
1592 | ||
1593 | /* Enable the iommu */ | |
1594 | if (!(ioc_feature_control & 0x1)) | |
1595 | pci_write_config_dword(pdev, 0x64, ioc_feature_control | 1); | |
1596 | ||
5bcd757f MG |
1597 | /* Restore the iommu BAR */ |
1598 | pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4, | |
1599 | iommu->stored_addr_lo); | |
1600 | pci_write_config_dword(iommu->dev, iommu->cap_ptr + 8, | |
1601 | iommu->stored_addr_hi); | |
1602 | ||
1603 | /* Restore the l1 indirect regs for each of the 6 l1s */ | |
1604 | for (i = 0; i < 6; i++) | |
1605 | for (j = 0; j < 0x12; j++) | |
1606 | iommu_write_l1(iommu, i, j, iommu->stored_l1[i][j]); | |
1607 | ||
1608 | /* Restore the l2 indirect regs */ | |
1609 | for (i = 0; i < 0x83; i++) | |
1610 | iommu_write_l2(iommu, i, iommu->stored_l2[i]); | |
1611 | ||
1612 | /* Lock PCI setup registers */ | |
1613 | pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4, | |
1614 | iommu->stored_addr_lo | 1); | |
4c894f47 JR |
1615 | } |
1616 | ||
b65233a9 JR |
1617 | /* |
1618 | * This function finally enables all IOMMUs found in the system after | |
1619 | * they have been initialized | |
1620 | */ | |
11ee5ac4 | 1621 | static void early_enable_iommus(void) |
8736197b JR |
1622 | { |
1623 | struct amd_iommu *iommu; | |
1624 | ||
3bd22172 | 1625 | for_each_iommu(iommu) { |
a8c485bb | 1626 | iommu_disable(iommu); |
e9bf5197 | 1627 | iommu_init_flags(iommu); |
58492e12 JR |
1628 | iommu_set_device_table(iommu); |
1629 | iommu_enable_command_buffer(iommu); | |
1630 | iommu_enable_event_buffer(iommu); | |
8736197b JR |
1631 | iommu_set_exclusion_range(iommu); |
1632 | iommu_enable(iommu); | |
7d0c5cc5 | 1633 | iommu_flush_all_caches(iommu); |
8736197b JR |
1634 | } |
1635 | } | |
1636 | ||
11ee5ac4 JR |
1637 | static void enable_iommus_v2(void) |
1638 | { | |
1639 | struct amd_iommu *iommu; | |
1640 | ||
1641 | for_each_iommu(iommu) { | |
1642 | iommu_enable_ppr_log(iommu); | |
1643 | iommu_enable_gt(iommu); | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | static void enable_iommus(void) | |
1648 | { | |
1649 | early_enable_iommus(); | |
1650 | ||
1651 | enable_iommus_v2(); | |
1652 | } | |
1653 | ||
92ac4320 JR |
1654 | static void disable_iommus(void) |
1655 | { | |
1656 | struct amd_iommu *iommu; | |
1657 | ||
1658 | for_each_iommu(iommu) | |
1659 | iommu_disable(iommu); | |
1660 | } | |
1661 | ||
7441e9cb JR |
1662 | /* |
1663 | * Suspend/Resume support | |
1664 | * disable suspend until real resume implemented | |
1665 | */ | |
1666 | ||
f3c6ea1b | 1667 | static void amd_iommu_resume(void) |
7441e9cb | 1668 | { |
5bcd757f MG |
1669 | struct amd_iommu *iommu; |
1670 | ||
1671 | for_each_iommu(iommu) | |
1672 | iommu_apply_resume_quirks(iommu); | |
1673 | ||
736501ee JR |
1674 | /* re-load the hardware */ |
1675 | enable_iommus(); | |
3d9761e7 JR |
1676 | |
1677 | amd_iommu_enable_interrupts(); | |
7441e9cb JR |
1678 | } |
1679 | ||
f3c6ea1b | 1680 | static int amd_iommu_suspend(void) |
7441e9cb | 1681 | { |
736501ee JR |
1682 | /* disable IOMMUs to go out of the way for BIOS */ |
1683 | disable_iommus(); | |
1684 | ||
1685 | return 0; | |
7441e9cb JR |
1686 | } |
1687 | ||
f3c6ea1b | 1688 | static struct syscore_ops amd_iommu_syscore_ops = { |
7441e9cb JR |
1689 | .suspend = amd_iommu_suspend, |
1690 | .resume = amd_iommu_resume, | |
1691 | }; | |
1692 | ||
8704a1ba JR |
1693 | static void __init free_on_init_error(void) |
1694 | { | |
0ea2c422 JR |
1695 | free_pages((unsigned long)irq_lookup_table, |
1696 | get_order(rlookup_table_size)); | |
8704a1ba | 1697 | |
05152a04 JR |
1698 | if (amd_iommu_irq_cache) { |
1699 | kmem_cache_destroy(amd_iommu_irq_cache); | |
1700 | amd_iommu_irq_cache = NULL; | |
0ea2c422 | 1701 | |
05152a04 | 1702 | } |
8704a1ba JR |
1703 | |
1704 | free_pages((unsigned long)amd_iommu_rlookup_table, | |
1705 | get_order(rlookup_table_size)); | |
1706 | ||
1707 | free_pages((unsigned long)amd_iommu_alias_table, | |
1708 | get_order(alias_table_size)); | |
1709 | ||
1710 | free_pages((unsigned long)amd_iommu_dev_table, | |
1711 | get_order(dev_table_size)); | |
1712 | ||
1713 | free_iommu_all(); | |
1714 | ||
8704a1ba JR |
1715 | #ifdef CONFIG_GART_IOMMU |
1716 | /* | |
1717 | * We failed to initialize the AMD IOMMU - try fallback to GART | |
1718 | * if possible. | |
1719 | */ | |
1720 | gart_iommu_init(); | |
1721 | ||
1722 | #endif | |
1723 | } | |
1724 | ||
c2ff5cf5 JR |
1725 | /* SB IOAPIC is always on this device in AMD systems */ |
1726 | #define IOAPIC_SB_DEVID ((0x00 << 8) | PCI_DEVFN(0x14, 0)) | |
1727 | ||
eb1eb7ae JR |
1728 | static bool __init check_ioapic_information(void) |
1729 | { | |
dfbb6d47 | 1730 | const char *fw_bug = FW_BUG; |
c2ff5cf5 | 1731 | bool ret, has_sb_ioapic; |
eb1eb7ae JR |
1732 | int idx; |
1733 | ||
c2ff5cf5 JR |
1734 | has_sb_ioapic = false; |
1735 | ret = false; | |
eb1eb7ae | 1736 | |
dfbb6d47 JR |
1737 | /* |
1738 | * If we have map overrides on the kernel command line the | |
1739 | * messages in this function might not describe firmware bugs | |
1740 | * anymore - so be careful | |
1741 | */ | |
1742 | if (cmdline_maps) | |
1743 | fw_bug = ""; | |
1744 | ||
c2ff5cf5 JR |
1745 | for (idx = 0; idx < nr_ioapics; idx++) { |
1746 | int devid, id = mpc_ioapic_id(idx); | |
1747 | ||
1748 | devid = get_ioapic_devid(id); | |
1749 | if (devid < 0) { | |
dfbb6d47 JR |
1750 | pr_err("%sAMD-Vi: IOAPIC[%d] not in IVRS table\n", |
1751 | fw_bug, id); | |
c2ff5cf5 JR |
1752 | ret = false; |
1753 | } else if (devid == IOAPIC_SB_DEVID) { | |
1754 | has_sb_ioapic = true; | |
1755 | ret = true; | |
eb1eb7ae JR |
1756 | } |
1757 | } | |
1758 | ||
c2ff5cf5 JR |
1759 | if (!has_sb_ioapic) { |
1760 | /* | |
1761 | * We expect the SB IOAPIC to be listed in the IVRS | |
1762 | * table. The system timer is connected to the SB IOAPIC | |
1763 | * and if we don't have it in the list the system will | |
1764 | * panic at boot time. This situation usually happens | |
1765 | * when the BIOS is buggy and provides us the wrong | |
1766 | * device id for the IOAPIC in the system. | |
1767 | */ | |
dfbb6d47 | 1768 | pr_err("%sAMD-Vi: No southbridge IOAPIC found\n", fw_bug); |
c2ff5cf5 JR |
1769 | } |
1770 | ||
1771 | if (!ret) | |
dfbb6d47 | 1772 | pr_err("AMD-Vi: Disabling interrupt remapping\n"); |
c2ff5cf5 JR |
1773 | |
1774 | return ret; | |
eb1eb7ae JR |
1775 | } |
1776 | ||
d04e0ba3 JR |
1777 | static void __init free_dma_resources(void) |
1778 | { | |
1779 | amd_iommu_uninit_devices(); | |
1780 | ||
1781 | free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, | |
1782 | get_order(MAX_DOMAIN_ID/8)); | |
1783 | ||
1784 | free_unity_maps(); | |
1785 | } | |
1786 | ||
b65233a9 | 1787 | /* |
8704a1ba JR |
1788 | * This is the hardware init function for AMD IOMMU in the system. |
1789 | * This function is called either from amd_iommu_init or from the interrupt | |
1790 | * remapping setup code. | |
b65233a9 JR |
1791 | * |
1792 | * This function basically parses the ACPI table for AMD IOMMU (IVRS) | |
1793 | * three times: | |
1794 | * | |
1795 | * 1 pass) Find the highest PCI device id the driver has to handle. | |
1796 | * Upon this information the size of the data structures is | |
1797 | * determined that needs to be allocated. | |
1798 | * | |
1799 | * 2 pass) Initialize the data structures just allocated with the | |
1800 | * information in the ACPI table about available AMD IOMMUs | |
1801 | * in the system. It also maps the PCI devices in the | |
1802 | * system to specific IOMMUs | |
1803 | * | |
1804 | * 3 pass) After the basic data structures are allocated and | |
1805 | * initialized we update them with information about memory | |
1806 | * remapping requirements parsed out of the ACPI table in | |
1807 | * this last pass. | |
1808 | * | |
8704a1ba JR |
1809 | * After everything is set up the IOMMUs are enabled and the necessary |
1810 | * hotplug and suspend notifiers are registered. | |
b65233a9 | 1811 | */ |
643511b3 | 1812 | static int __init early_amd_iommu_init(void) |
fe74c9cf | 1813 | { |
02f3b3f5 JR |
1814 | struct acpi_table_header *ivrs_base; |
1815 | acpi_size ivrs_size; | |
1816 | acpi_status status; | |
fe74c9cf JR |
1817 | int i, ret = 0; |
1818 | ||
643511b3 | 1819 | if (!amd_iommu_detected) |
8704a1ba JR |
1820 | return -ENODEV; |
1821 | ||
02f3b3f5 JR |
1822 | status = acpi_get_table_with_size("IVRS", 0, &ivrs_base, &ivrs_size); |
1823 | if (status == AE_NOT_FOUND) | |
1824 | return -ENODEV; | |
1825 | else if (ACPI_FAILURE(status)) { | |
1826 | const char *err = acpi_format_exception(status); | |
1827 | pr_err("AMD-Vi: IVRS table error: %s\n", err); | |
1828 | return -EINVAL; | |
1829 | } | |
1830 | ||
fe74c9cf JR |
1831 | /* |
1832 | * First parse ACPI tables to find the largest Bus/Dev/Func | |
1833 | * we need to handle. Upon this information the shared data | |
1834 | * structures for the IOMMUs in the system will be allocated | |
1835 | */ | |
2c0ae172 JR |
1836 | ret = find_last_devid_acpi(ivrs_base); |
1837 | if (ret) | |
3551a708 JR |
1838 | goto out; |
1839 | ||
c571484e JR |
1840 | dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE); |
1841 | alias_table_size = tbl_size(ALIAS_TABLE_ENTRY_SIZE); | |
1842 | rlookup_table_size = tbl_size(RLOOKUP_TABLE_ENTRY_SIZE); | |
fe74c9cf | 1843 | |
fe74c9cf | 1844 | /* Device table - directly used by all IOMMUs */ |
8704a1ba | 1845 | ret = -ENOMEM; |
5dc8bff0 | 1846 | amd_iommu_dev_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, |
fe74c9cf JR |
1847 | get_order(dev_table_size)); |
1848 | if (amd_iommu_dev_table == NULL) | |
1849 | goto out; | |
1850 | ||
1851 | /* | |
1852 | * Alias table - map PCI Bus/Dev/Func to Bus/Dev/Func the | |
1853 | * IOMMU see for that device | |
1854 | */ | |
1855 | amd_iommu_alias_table = (void *)__get_free_pages(GFP_KERNEL, | |
1856 | get_order(alias_table_size)); | |
1857 | if (amd_iommu_alias_table == NULL) | |
2c0ae172 | 1858 | goto out; |
fe74c9cf JR |
1859 | |
1860 | /* IOMMU rlookup table - find the IOMMU for a specific device */ | |
83fd5cc6 JR |
1861 | amd_iommu_rlookup_table = (void *)__get_free_pages( |
1862 | GFP_KERNEL | __GFP_ZERO, | |
fe74c9cf JR |
1863 | get_order(rlookup_table_size)); |
1864 | if (amd_iommu_rlookup_table == NULL) | |
2c0ae172 | 1865 | goto out; |
fe74c9cf | 1866 | |
5dc8bff0 JR |
1867 | amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages( |
1868 | GFP_KERNEL | __GFP_ZERO, | |
fe74c9cf JR |
1869 | get_order(MAX_DOMAIN_ID/8)); |
1870 | if (amd_iommu_pd_alloc_bitmap == NULL) | |
2c0ae172 | 1871 | goto out; |
fe74c9cf JR |
1872 | |
1873 | /* | |
5dc8bff0 | 1874 | * let all alias entries point to itself |
fe74c9cf | 1875 | */ |
3a61ec38 | 1876 | for (i = 0; i <= amd_iommu_last_bdf; ++i) |
fe74c9cf JR |
1877 | amd_iommu_alias_table[i] = i; |
1878 | ||
fe74c9cf JR |
1879 | /* |
1880 | * never allocate domain 0 because its used as the non-allocated and | |
1881 | * error value placeholder | |
1882 | */ | |
1883 | amd_iommu_pd_alloc_bitmap[0] = 1; | |
1884 | ||
aeb26f55 JR |
1885 | spin_lock_init(&amd_iommu_pd_lock); |
1886 | ||
fe74c9cf JR |
1887 | /* |
1888 | * now the data structures are allocated and basically initialized | |
1889 | * start the real acpi table scan | |
1890 | */ | |
02f3b3f5 JR |
1891 | ret = init_iommu_all(ivrs_base); |
1892 | if (ret) | |
2c0ae172 | 1893 | goto out; |
fe74c9cf | 1894 | |
eb1eb7ae JR |
1895 | if (amd_iommu_irq_remap) |
1896 | amd_iommu_irq_remap = check_ioapic_information(); | |
1897 | ||
05152a04 JR |
1898 | if (amd_iommu_irq_remap) { |
1899 | /* | |
1900 | * Interrupt remapping enabled, create kmem_cache for the | |
1901 | * remapping tables. | |
1902 | */ | |
83ed9c13 | 1903 | ret = -ENOMEM; |
05152a04 JR |
1904 | amd_iommu_irq_cache = kmem_cache_create("irq_remap_cache", |
1905 | MAX_IRQS_PER_TABLE * sizeof(u32), | |
1906 | IRQ_TABLE_ALIGNMENT, | |
1907 | 0, NULL); | |
1908 | if (!amd_iommu_irq_cache) | |
1909 | goto out; | |
0ea2c422 JR |
1910 | |
1911 | irq_lookup_table = (void *)__get_free_pages( | |
1912 | GFP_KERNEL | __GFP_ZERO, | |
1913 | get_order(rlookup_table_size)); | |
1914 | if (!irq_lookup_table) | |
1915 | goto out; | |
05152a04 JR |
1916 | } |
1917 | ||
02f3b3f5 JR |
1918 | ret = init_memory_definitions(ivrs_base); |
1919 | if (ret) | |
2c0ae172 | 1920 | goto out; |
3551a708 | 1921 | |
eb1eb7ae JR |
1922 | /* init the device table */ |
1923 | init_device_table(); | |
1924 | ||
8704a1ba | 1925 | out: |
02f3b3f5 JR |
1926 | /* Don't leak any ACPI memory */ |
1927 | early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size); | |
1928 | ivrs_base = NULL; | |
1929 | ||
643511b3 JR |
1930 | return ret; |
1931 | } | |
1932 | ||
ae295142 | 1933 | static int amd_iommu_enable_interrupts(void) |
3d9761e7 JR |
1934 | { |
1935 | struct amd_iommu *iommu; | |
1936 | int ret = 0; | |
1937 | ||
1938 | for_each_iommu(iommu) { | |
1939 | ret = iommu_init_msi(iommu); | |
1940 | if (ret) | |
1941 | goto out; | |
1942 | } | |
1943 | ||
1944 | out: | |
1945 | return ret; | |
1946 | } | |
1947 | ||
02f3b3f5 JR |
1948 | static bool detect_ivrs(void) |
1949 | { | |
1950 | struct acpi_table_header *ivrs_base; | |
1951 | acpi_size ivrs_size; | |
1952 | acpi_status status; | |
1953 | ||
1954 | status = acpi_get_table_with_size("IVRS", 0, &ivrs_base, &ivrs_size); | |
1955 | if (status == AE_NOT_FOUND) | |
1956 | return false; | |
1957 | else if (ACPI_FAILURE(status)) { | |
1958 | const char *err = acpi_format_exception(status); | |
1959 | pr_err("AMD-Vi: IVRS table error: %s\n", err); | |
1960 | return false; | |
1961 | } | |
1962 | ||
1963 | early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size); | |
1964 | ||
1adb7d31 JR |
1965 | /* Make sure ACS will be enabled during PCI probe */ |
1966 | pci_request_acs(); | |
1967 | ||
05152a04 JR |
1968 | if (!disable_irq_remap) |
1969 | amd_iommu_irq_remap = true; | |
1970 | ||
02f3b3f5 JR |
1971 | return true; |
1972 | } | |
1973 | ||
b9b1ce70 JR |
1974 | static int amd_iommu_init_dma(void) |
1975 | { | |
33f28c59 | 1976 | struct amd_iommu *iommu; |
b9b1ce70 JR |
1977 | int ret; |
1978 | ||
1979 | if (iommu_pass_through) | |
1980 | ret = amd_iommu_init_passthrough(); | |
1981 | else | |
1982 | ret = amd_iommu_init_dma_ops(); | |
1983 | ||
1984 | if (ret) | |
1985 | return ret; | |
1986 | ||
f528d980 JR |
1987 | init_device_table_dma(); |
1988 | ||
1989 | for_each_iommu(iommu) | |
1990 | iommu_flush_all_caches(iommu); | |
1991 | ||
b9b1ce70 JR |
1992 | amd_iommu_init_api(); |
1993 | ||
1994 | amd_iommu_init_notifier(); | |
1995 | ||
1996 | return 0; | |
1997 | } | |
1998 | ||
2c0ae172 | 1999 | /**************************************************************************** |
8704a1ba | 2000 | * |
2c0ae172 JR |
2001 | * AMD IOMMU Initialization State Machine |
2002 | * | |
2003 | ****************************************************************************/ | |
2004 | ||
2005 | static int __init state_next(void) | |
8704a1ba JR |
2006 | { |
2007 | int ret = 0; | |
2008 | ||
2c0ae172 JR |
2009 | switch (init_state) { |
2010 | case IOMMU_START_STATE: | |
2011 | if (!detect_ivrs()) { | |
2012 | init_state = IOMMU_NOT_FOUND; | |
2013 | ret = -ENODEV; | |
2014 | } else { | |
2015 | init_state = IOMMU_IVRS_DETECTED; | |
2016 | } | |
2017 | break; | |
2018 | case IOMMU_IVRS_DETECTED: | |
2019 | ret = early_amd_iommu_init(); | |
2020 | init_state = ret ? IOMMU_INIT_ERROR : IOMMU_ACPI_FINISHED; | |
2021 | break; | |
2022 | case IOMMU_ACPI_FINISHED: | |
2023 | early_enable_iommus(); | |
2024 | register_syscore_ops(&amd_iommu_syscore_ops); | |
2025 | x86_platform.iommu_shutdown = disable_iommus; | |
2026 | init_state = IOMMU_ENABLED; | |
2027 | break; | |
2028 | case IOMMU_ENABLED: | |
2029 | ret = amd_iommu_init_pci(); | |
2030 | init_state = ret ? IOMMU_INIT_ERROR : IOMMU_PCI_INIT; | |
2031 | enable_iommus_v2(); | |
2032 | break; | |
2033 | case IOMMU_PCI_INIT: | |
2034 | ret = amd_iommu_enable_interrupts(); | |
2035 | init_state = ret ? IOMMU_INIT_ERROR : IOMMU_INTERRUPTS_EN; | |
2036 | break; | |
2037 | case IOMMU_INTERRUPTS_EN: | |
2038 | ret = amd_iommu_init_dma(); | |
2039 | init_state = ret ? IOMMU_INIT_ERROR : IOMMU_DMA_OPS; | |
2040 | break; | |
2041 | case IOMMU_DMA_OPS: | |
2042 | init_state = IOMMU_INITIALIZED; | |
2043 | break; | |
2044 | case IOMMU_INITIALIZED: | |
2045 | /* Nothing to do */ | |
2046 | break; | |
2047 | case IOMMU_NOT_FOUND: | |
2048 | case IOMMU_INIT_ERROR: | |
2049 | /* Error states => do nothing */ | |
2050 | ret = -EINVAL; | |
2051 | break; | |
2052 | default: | |
2053 | /* Unknown state */ | |
2054 | BUG(); | |
2055 | } | |
3d9761e7 | 2056 | |
2c0ae172 JR |
2057 | return ret; |
2058 | } | |
7441e9cb | 2059 | |
2c0ae172 JR |
2060 | static int __init iommu_go_to_state(enum iommu_init_state state) |
2061 | { | |
2062 | int ret = 0; | |
f5325094 | 2063 | |
2c0ae172 JR |
2064 | while (init_state != state) { |
2065 | ret = state_next(); | |
2066 | if (init_state == IOMMU_NOT_FOUND || | |
2067 | init_state == IOMMU_INIT_ERROR) | |
2068 | break; | |
2069 | } | |
f2f12b6f | 2070 | |
fe74c9cf | 2071 | return ret; |
2c0ae172 | 2072 | } |
fe74c9cf | 2073 | |
6b474b82 JR |
2074 | #ifdef CONFIG_IRQ_REMAP |
2075 | int __init amd_iommu_prepare(void) | |
2076 | { | |
2077 | return iommu_go_to_state(IOMMU_ACPI_FINISHED); | |
2078 | } | |
d7f07769 | 2079 | |
6b474b82 JR |
2080 | int __init amd_iommu_supported(void) |
2081 | { | |
2082 | return amd_iommu_irq_remap ? 1 : 0; | |
2083 | } | |
2084 | ||
2085 | int __init amd_iommu_enable(void) | |
2086 | { | |
2087 | int ret; | |
2088 | ||
2089 | ret = iommu_go_to_state(IOMMU_ENABLED); | |
2090 | if (ret) | |
2091 | return ret; | |
d7f07769 | 2092 | |
6b474b82 | 2093 | irq_remapping_enabled = 1; |
d7f07769 | 2094 | |
6b474b82 JR |
2095 | return 0; |
2096 | } | |
2097 | ||
2098 | void amd_iommu_disable(void) | |
2099 | { | |
2100 | amd_iommu_suspend(); | |
2101 | } | |
2102 | ||
2103 | int amd_iommu_reenable(int mode) | |
2104 | { | |
2105 | amd_iommu_resume(); | |
2106 | ||
2107 | return 0; | |
2108 | } | |
d7f07769 | 2109 | |
6b474b82 JR |
2110 | int __init amd_iommu_enable_faulting(void) |
2111 | { | |
2112 | /* We enable MSI later when PCI is initialized */ | |
2113 | return 0; | |
2114 | } | |
2115 | #endif | |
d7f07769 | 2116 | |
2c0ae172 JR |
2117 | /* |
2118 | * This is the core init function for AMD IOMMU hardware in the system. | |
2119 | * This function is called from the generic x86 DMA layer initialization | |
2120 | * code. | |
2121 | */ | |
2122 | static int __init amd_iommu_init(void) | |
2123 | { | |
2124 | int ret; | |
2125 | ||
2126 | ret = iommu_go_to_state(IOMMU_INITIALIZED); | |
2127 | if (ret) { | |
d04e0ba3 JR |
2128 | free_dma_resources(); |
2129 | if (!irq_remapping_enabled) { | |
2130 | disable_iommus(); | |
2131 | free_on_init_error(); | |
2132 | } else { | |
2133 | struct amd_iommu *iommu; | |
2134 | ||
2135 | uninit_device_table_dma(); | |
2136 | for_each_iommu(iommu) | |
2137 | iommu_flush_all_caches(iommu); | |
2138 | } | |
2c0ae172 JR |
2139 | } |
2140 | ||
2141 | return ret; | |
fe74c9cf JR |
2142 | } |
2143 | ||
b65233a9 JR |
2144 | /**************************************************************************** |
2145 | * | |
2146 | * Early detect code. This code runs at IOMMU detection time in the DMA | |
2147 | * layer. It just looks if there is an IVRS ACPI table to detect AMD | |
2148 | * IOMMUs | |
2149 | * | |
2150 | ****************************************************************************/ | |
480125ba | 2151 | int __init amd_iommu_detect(void) |
ae7877de | 2152 | { |
2c0ae172 | 2153 | int ret; |
02f3b3f5 | 2154 | |
75f1cdf1 | 2155 | if (no_iommu || (iommu_detected && !gart_iommu_aperture)) |
480125ba | 2156 | return -ENODEV; |
ae7877de | 2157 | |
a5235725 | 2158 | if (amd_iommu_disabled) |
480125ba | 2159 | return -ENODEV; |
a5235725 | 2160 | |
2c0ae172 JR |
2161 | ret = iommu_go_to_state(IOMMU_IVRS_DETECTED); |
2162 | if (ret) | |
2163 | return ret; | |
11bd04f6 | 2164 | |
02f3b3f5 JR |
2165 | amd_iommu_detected = true; |
2166 | iommu_detected = 1; | |
2167 | x86_init.iommu.iommu_init = amd_iommu_init; | |
2168 | ||
02f3b3f5 | 2169 | return 0; |
ae7877de JR |
2170 | } |
2171 | ||
b65233a9 JR |
2172 | /**************************************************************************** |
2173 | * | |
2174 | * Parsing functions for the AMD IOMMU specific kernel command line | |
2175 | * options. | |
2176 | * | |
2177 | ****************************************************************************/ | |
2178 | ||
fefda117 JR |
2179 | static int __init parse_amd_iommu_dump(char *str) |
2180 | { | |
2181 | amd_iommu_dump = true; | |
2182 | ||
2183 | return 1; | |
2184 | } | |
2185 | ||
918ad6c5 JR |
2186 | static int __init parse_amd_iommu_options(char *str) |
2187 | { | |
2188 | for (; *str; ++str) { | |
695b5676 | 2189 | if (strncmp(str, "fullflush", 9) == 0) |
afa9fdc2 | 2190 | amd_iommu_unmap_flush = true; |
a5235725 JR |
2191 | if (strncmp(str, "off", 3) == 0) |
2192 | amd_iommu_disabled = true; | |
5abcdba4 JR |
2193 | if (strncmp(str, "force_isolation", 15) == 0) |
2194 | amd_iommu_force_isolation = true; | |
918ad6c5 JR |
2195 | } |
2196 | ||
2197 | return 1; | |
2198 | } | |
2199 | ||
440e8998 JR |
2200 | static int __init parse_ivrs_ioapic(char *str) |
2201 | { | |
2202 | unsigned int bus, dev, fn; | |
2203 | int ret, id, i; | |
2204 | u16 devid; | |
2205 | ||
2206 | ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn); | |
2207 | ||
2208 | if (ret != 4) { | |
2209 | pr_err("AMD-Vi: Invalid command line: ivrs_ioapic%s\n", str); | |
2210 | return 1; | |
2211 | } | |
2212 | ||
2213 | if (early_ioapic_map_size == EARLY_MAP_SIZE) { | |
2214 | pr_err("AMD-Vi: Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n", | |
2215 | str); | |
2216 | return 1; | |
2217 | } | |
2218 | ||
2219 | devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7); | |
2220 | ||
dfbb6d47 | 2221 | cmdline_maps = true; |
440e8998 JR |
2222 | i = early_ioapic_map_size++; |
2223 | early_ioapic_map[i].id = id; | |
2224 | early_ioapic_map[i].devid = devid; | |
2225 | early_ioapic_map[i].cmd_line = true; | |
2226 | ||
2227 | return 1; | |
2228 | } | |
2229 | ||
2230 | static int __init parse_ivrs_hpet(char *str) | |
2231 | { | |
2232 | unsigned int bus, dev, fn; | |
2233 | int ret, id, i; | |
2234 | u16 devid; | |
2235 | ||
2236 | ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn); | |
2237 | ||
2238 | if (ret != 4) { | |
2239 | pr_err("AMD-Vi: Invalid command line: ivrs_hpet%s\n", str); | |
2240 | return 1; | |
2241 | } | |
2242 | ||
2243 | if (early_hpet_map_size == EARLY_MAP_SIZE) { | |
2244 | pr_err("AMD-Vi: Early HPET map overflow - ignoring ivrs_hpet%s\n", | |
2245 | str); | |
2246 | return 1; | |
2247 | } | |
2248 | ||
2249 | devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7); | |
2250 | ||
dfbb6d47 | 2251 | cmdline_maps = true; |
440e8998 JR |
2252 | i = early_hpet_map_size++; |
2253 | early_hpet_map[i].id = id; | |
2254 | early_hpet_map[i].devid = devid; | |
2255 | early_hpet_map[i].cmd_line = true; | |
2256 | ||
2257 | return 1; | |
2258 | } | |
2259 | ||
2260 | __setup("amd_iommu_dump", parse_amd_iommu_dump); | |
2261 | __setup("amd_iommu=", parse_amd_iommu_options); | |
2262 | __setup("ivrs_ioapic", parse_ivrs_ioapic); | |
2263 | __setup("ivrs_hpet", parse_ivrs_hpet); | |
22e6daf4 KRW |
2264 | |
2265 | IOMMU_INIT_FINISH(amd_iommu_detect, | |
2266 | gart_iommu_hole_init, | |
98f1ad25 JR |
2267 | NULL, |
2268 | NULL); | |
400a28a0 JR |
2269 | |
2270 | bool amd_iommu_v2_supported(void) | |
2271 | { | |
2272 | return amd_iommu_v2_present; | |
2273 | } | |
2274 | EXPORT_SYMBOL(amd_iommu_v2_supported); | |
30861ddc SK |
2275 | |
2276 | /**************************************************************************** | |
2277 | * | |
2278 | * IOMMU EFR Performance Counter support functionality. This code allows | |
2279 | * access to the IOMMU PC functionality. | |
2280 | * | |
2281 | ****************************************************************************/ | |
2282 | ||
2283 | u8 amd_iommu_pc_get_max_banks(u16 devid) | |
2284 | { | |
2285 | struct amd_iommu *iommu; | |
2286 | u8 ret = 0; | |
2287 | ||
2288 | /* locate the iommu governing the devid */ | |
2289 | iommu = amd_iommu_rlookup_table[devid]; | |
2290 | if (iommu) | |
2291 | ret = iommu->max_banks; | |
2292 | ||
2293 | return ret; | |
2294 | } | |
2295 | EXPORT_SYMBOL(amd_iommu_pc_get_max_banks); | |
2296 | ||
2297 | bool amd_iommu_pc_supported(void) | |
2298 | { | |
2299 | return amd_iommu_pc_present; | |
2300 | } | |
2301 | EXPORT_SYMBOL(amd_iommu_pc_supported); | |
2302 | ||
2303 | u8 amd_iommu_pc_get_max_counters(u16 devid) | |
2304 | { | |
2305 | struct amd_iommu *iommu; | |
2306 | u8 ret = 0; | |
2307 | ||
2308 | /* locate the iommu governing the devid */ | |
2309 | iommu = amd_iommu_rlookup_table[devid]; | |
2310 | if (iommu) | |
2311 | ret = iommu->max_counters; | |
2312 | ||
2313 | return ret; | |
2314 | } | |
2315 | EXPORT_SYMBOL(amd_iommu_pc_get_max_counters); | |
2316 | ||
2317 | int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn, | |
2318 | u64 *value, bool is_write) | |
2319 | { | |
2320 | struct amd_iommu *iommu; | |
2321 | u32 offset; | |
2322 | u32 max_offset_lim; | |
2323 | ||
2324 | /* Make sure the IOMMU PC resource is available */ | |
2325 | if (!amd_iommu_pc_present) | |
2326 | return -ENODEV; | |
2327 | ||
2328 | /* Locate the iommu associated with the device ID */ | |
2329 | iommu = amd_iommu_rlookup_table[devid]; | |
2330 | ||
2331 | /* Check for valid iommu and pc register indexing */ | |
2332 | if (WARN_ON((iommu == NULL) || (fxn > 0x28) || (fxn & 7))) | |
2333 | return -ENODEV; | |
2334 | ||
2335 | offset = (u32)(((0x40|bank) << 12) | (cntr << 8) | fxn); | |
2336 | ||
2337 | /* Limit the offset to the hw defined mmio region aperture */ | |
2338 | max_offset_lim = (u32)(((0x40|iommu->max_banks) << 12) | | |
2339 | (iommu->max_counters << 8) | 0x28); | |
2340 | if ((offset < MMIO_CNTR_REG_OFFSET) || | |
2341 | (offset > max_offset_lim)) | |
2342 | return -EINVAL; | |
2343 | ||
2344 | if (is_write) { | |
2345 | writel((u32)*value, iommu->mmio_base + offset); | |
2346 | writel((*value >> 32), iommu->mmio_base + offset + 4); | |
2347 | } else { | |
2348 | *value = readl(iommu->mmio_base + offset + 4); | |
2349 | *value <<= 32; | |
2350 | *value = readl(iommu->mmio_base + offset); | |
2351 | } | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | EXPORT_SYMBOL(amd_iommu_pc_get_set_reg_val); |