Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006, Intel Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
mark gross | 98bcef5 | 2008-02-23 15:23:35 -0800 | [diff] [blame] | 17 | * Copyright (C) 2006-2008 Intel Corporation |
| 18 | * Author: Ashok Raj <ashok.raj@intel.com> |
| 19 | * Author: Shaohua Li <shaohua.li@intel.com> |
| 20 | * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 21 | * |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 22 | * This file implements early detection/parsing of Remapping Devices |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 23 | * reported to OS through BIOS via DMA remapping reporting (DMAR) ACPI |
| 24 | * tables. |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 25 | * |
| 26 | * These routines are used by both DMA-remapping and Interrupt-remapping |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 27 | */ |
| 28 | |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* has to precede printk.h */ |
| 30 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 31 | #include <linux/pci.h> |
| 32 | #include <linux/dmar.h> |
Kay, Allen M | 3871794 | 2008-09-09 18:37:29 +0300 | [diff] [blame] | 33 | #include <linux/iova.h> |
| 34 | #include <linux/intel-iommu.h> |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 35 | #include <linux/timer.h> |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 36 | #include <linux/irq.h> |
| 37 | #include <linux/interrupt.h> |
Shane Wang | 69575d3 | 2009-09-01 18:25:07 -0700 | [diff] [blame] | 38 | #include <linux/tboot.h> |
Len Brown | eb27cae | 2009-07-06 23:40:19 -0400 | [diff] [blame] | 39 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Suresh Siddha | 8a8f422 | 2012-03-30 11:47:08 -0700 | [diff] [blame] | 41 | #include <asm/irq_remapping.h> |
Konrad Rzeszutek Wilk | 4db77ff | 2010-08-26 13:58:04 -0400 | [diff] [blame] | 42 | #include <asm/iommu_table.h> |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 43 | |
Joerg Roedel | 078e1ee | 2012-09-26 12:44:43 +0200 | [diff] [blame] | 44 | #include "irq_remapping.h" |
| 45 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 46 | /* No locks are needed as DMA remapping hardware unit |
| 47 | * list is constructed at boot time and hotplug of |
| 48 | * these units are not supported by the architecture. |
| 49 | */ |
| 50 | LIST_HEAD(dmar_drhd_units); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 51 | |
Suresh Siddha | 41750d3 | 2011-08-23 17:05:18 -0700 | [diff] [blame] | 52 | struct acpi_table_header * __initdata dmar_tbl; |
Yinghai Lu | 8e1568f | 2009-02-11 01:06:59 -0800 | [diff] [blame] | 53 | static acpi_size dmar_tbl_size; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 54 | |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame^] | 55 | static int alloc_iommu(struct dmar_drhd_unit *drhd); |
| 56 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 57 | static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd) |
| 58 | { |
| 59 | /* |
| 60 | * add INCLUDE_ALL at the tail, so scan the list will find it at |
| 61 | * the very end. |
| 62 | */ |
| 63 | if (drhd->include_all) |
| 64 | list_add_tail(&drhd->list, &dmar_drhd_units); |
| 65 | else |
| 66 | list_add(&drhd->list, &dmar_drhd_units); |
| 67 | } |
| 68 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 69 | static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, |
| 70 | struct pci_dev **dev, u16 segment) |
| 71 | { |
| 72 | struct pci_bus *bus; |
| 73 | struct pci_dev *pdev = NULL; |
| 74 | struct acpi_dmar_pci_path *path; |
| 75 | int count; |
| 76 | |
| 77 | bus = pci_find_bus(segment, scope->bus); |
| 78 | path = (struct acpi_dmar_pci_path *)(scope + 1); |
| 79 | count = (scope->length - sizeof(struct acpi_dmar_device_scope)) |
| 80 | / sizeof(struct acpi_dmar_pci_path); |
| 81 | |
| 82 | while (count) { |
| 83 | if (pdev) |
| 84 | pci_dev_put(pdev); |
| 85 | /* |
| 86 | * Some BIOSes list non-exist devices in DMAR table, just |
| 87 | * ignore it |
| 88 | */ |
| 89 | if (!bus) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 90 | pr_warn("Device scope bus [%d] not found\n", scope->bus); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 91 | break; |
| 92 | } |
Lv Zheng | fa5f508 | 2013-10-31 09:30:22 +0800 | [diff] [blame] | 93 | pdev = pci_get_slot(bus, PCI_DEVFN(path->device, path->function)); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 94 | if (!pdev) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 95 | /* warning will be printed below */ |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 96 | break; |
| 97 | } |
| 98 | path ++; |
| 99 | count --; |
| 100 | bus = pdev->subordinate; |
| 101 | } |
| 102 | if (!pdev) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 103 | pr_warn("Device scope device [%04x:%02x:%02x.%02x] not found\n", |
Lv Zheng | fa5f508 | 2013-10-31 09:30:22 +0800 | [diff] [blame] | 104 | segment, scope->bus, path->device, path->function); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && \ |
| 108 | pdev->subordinate) || (scope->entry_type == \ |
| 109 | ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) { |
| 110 | pci_dev_put(pdev); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 111 | pr_warn("Device scope type does not match for %s\n", |
| 112 | pci_name(pdev)); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 113 | return -EINVAL; |
| 114 | } |
| 115 | *dev = pdev; |
| 116 | return 0; |
| 117 | } |
| 118 | |
Suresh Siddha | 318fe7d | 2011-08-23 17:05:20 -0700 | [diff] [blame] | 119 | int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, |
| 120 | struct pci_dev ***devices, u16 segment) |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 121 | { |
| 122 | struct acpi_dmar_device_scope *scope; |
| 123 | void * tmp = start; |
| 124 | int index; |
| 125 | int ret; |
| 126 | |
| 127 | *cnt = 0; |
| 128 | while (start < end) { |
| 129 | scope = start; |
| 130 | if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || |
| 131 | scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) |
| 132 | (*cnt)++; |
Linn Crosetto | ae3e7f3 | 2013-04-23 12:26:45 -0600 | [diff] [blame] | 133 | else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC && |
| 134 | scope->entry_type != ACPI_DMAR_SCOPE_TYPE_HPET) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 135 | pr_warn("Unsupported device scope\n"); |
Yinghai Lu | 5715f0f | 2010-04-08 19:58:22 +0100 | [diff] [blame] | 136 | } |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 137 | start += scope->length; |
| 138 | } |
| 139 | if (*cnt == 0) |
| 140 | return 0; |
| 141 | |
| 142 | *devices = kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL); |
| 143 | if (!*devices) |
| 144 | return -ENOMEM; |
| 145 | |
| 146 | start = tmp; |
| 147 | index = 0; |
| 148 | while (start < end) { |
| 149 | scope = start; |
| 150 | if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || |
| 151 | scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) { |
| 152 | ret = dmar_parse_one_dev_scope(scope, |
| 153 | &(*devices)[index], segment); |
| 154 | if (ret) { |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 155 | dmar_free_dev_scope(devices, cnt); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 156 | return ret; |
| 157 | } |
| 158 | index ++; |
| 159 | } |
| 160 | start += scope->length; |
| 161 | } |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 166 | void dmar_free_dev_scope(struct pci_dev ***devices, int *cnt) |
| 167 | { |
| 168 | if (*devices && *cnt) { |
| 169 | while (--*cnt >= 0) |
| 170 | pci_dev_put((*devices)[*cnt]); |
| 171 | kfree(*devices); |
| 172 | *devices = NULL; |
| 173 | *cnt = 0; |
| 174 | } |
| 175 | } |
| 176 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 177 | /** |
| 178 | * dmar_parse_one_drhd - parses exactly one DMA remapping hardware definition |
| 179 | * structure which uniquely represent one DMA remapping hardware unit |
| 180 | * present in the platform |
| 181 | */ |
| 182 | static int __init |
| 183 | dmar_parse_one_drhd(struct acpi_dmar_header *header) |
| 184 | { |
| 185 | struct acpi_dmar_hardware_unit *drhd; |
| 186 | struct dmar_drhd_unit *dmaru; |
| 187 | int ret = 0; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 188 | |
David Woodhouse | e523b38 | 2009-04-10 22:27:48 -0700 | [diff] [blame] | 189 | drhd = (struct acpi_dmar_hardware_unit *)header; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 190 | dmaru = kzalloc(sizeof(*dmaru), GFP_KERNEL); |
| 191 | if (!dmaru) |
| 192 | return -ENOMEM; |
| 193 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 194 | dmaru->hdr = header; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 195 | dmaru->reg_base_addr = drhd->address; |
David Woodhouse | 276dbf99 | 2009-04-04 01:45:37 +0100 | [diff] [blame] | 196 | dmaru->segment = drhd->segment; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 197 | dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */ |
| 198 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 199 | ret = alloc_iommu(dmaru); |
| 200 | if (ret) { |
| 201 | kfree(dmaru); |
| 202 | return ret; |
| 203 | } |
| 204 | dmar_register_drhd_unit(dmaru); |
| 205 | return 0; |
| 206 | } |
| 207 | |
David Woodhouse | f82851a | 2008-10-18 15:43:14 +0100 | [diff] [blame] | 208 | static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru) |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 209 | { |
| 210 | struct acpi_dmar_hardware_unit *drhd; |
David Woodhouse | f82851a | 2008-10-18 15:43:14 +0100 | [diff] [blame] | 211 | int ret = 0; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 212 | |
| 213 | drhd = (struct acpi_dmar_hardware_unit *) dmaru->hdr; |
| 214 | |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 215 | if (dmaru->include_all) |
| 216 | return 0; |
| 217 | |
| 218 | ret = dmar_parse_dev_scope((void *)(drhd + 1), |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 219 | ((void *)drhd) + drhd->header.length, |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 220 | &dmaru->devices_cnt, &dmaru->devices, |
| 221 | drhd->segment); |
Suresh Siddha | 1c7d1bc | 2008-09-03 16:58:35 -0700 | [diff] [blame] | 222 | if (ret) { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 223 | list_del(&dmaru->list); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 224 | kfree(dmaru); |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 225 | } |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 226 | return ret; |
| 227 | } |
| 228 | |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 229 | #ifdef CONFIG_ACPI_NUMA |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 230 | static int __init |
| 231 | dmar_parse_one_rhsa(struct acpi_dmar_header *header) |
| 232 | { |
| 233 | struct acpi_dmar_rhsa *rhsa; |
| 234 | struct dmar_drhd_unit *drhd; |
| 235 | |
| 236 | rhsa = (struct acpi_dmar_rhsa *)header; |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 237 | for_each_drhd_unit(drhd) { |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 238 | if (drhd->reg_base_addr == rhsa->base_address) { |
| 239 | int node = acpi_map_pxm_to_node(rhsa->proximity_domain); |
| 240 | |
| 241 | if (!node_online(node)) |
| 242 | node = -1; |
| 243 | drhd->iommu->node = node; |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 244 | return 0; |
| 245 | } |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 246 | } |
Ben Hutchings | fd0c889 | 2010-04-03 19:38:43 +0100 | [diff] [blame] | 247 | WARN_TAINT( |
| 248 | 1, TAINT_FIRMWARE_WORKAROUND, |
| 249 | "Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n" |
| 250 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", |
| 251 | drhd->reg_base_addr, |
| 252 | dmi_get_system_info(DMI_BIOS_VENDOR), |
| 253 | dmi_get_system_info(DMI_BIOS_VERSION), |
| 254 | dmi_get_system_info(DMI_PRODUCT_VERSION)); |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 255 | |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 256 | return 0; |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 257 | } |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 258 | #endif |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 259 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 260 | static void __init |
| 261 | dmar_table_print_dmar_entry(struct acpi_dmar_header *header) |
| 262 | { |
| 263 | struct acpi_dmar_hardware_unit *drhd; |
| 264 | struct acpi_dmar_reserved_memory *rmrr; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 265 | struct acpi_dmar_atsr *atsr; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 266 | struct acpi_dmar_rhsa *rhsa; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 267 | |
| 268 | switch (header->type) { |
| 269 | case ACPI_DMAR_TYPE_HARDWARE_UNIT: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 270 | drhd = container_of(header, struct acpi_dmar_hardware_unit, |
| 271 | header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 272 | pr_info("DRHD base: %#016Lx flags: %#x\n", |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 273 | (unsigned long long)drhd->address, drhd->flags); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 274 | break; |
| 275 | case ACPI_DMAR_TYPE_RESERVED_MEMORY: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 276 | rmrr = container_of(header, struct acpi_dmar_reserved_memory, |
| 277 | header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 278 | pr_info("RMRR base: %#016Lx end: %#016Lx\n", |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 279 | (unsigned long long)rmrr->base_address, |
| 280 | (unsigned long long)rmrr->end_address); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 281 | break; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 282 | case ACPI_DMAR_TYPE_ATSR: |
| 283 | atsr = container_of(header, struct acpi_dmar_atsr, header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 284 | pr_info("ATSR flags: %#x\n", atsr->flags); |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 285 | break; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 286 | case ACPI_DMAR_HARDWARE_AFFINITY: |
| 287 | rhsa = container_of(header, struct acpi_dmar_rhsa, header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 288 | pr_info("RHSA base: %#016Lx proximity domain: %#x\n", |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 289 | (unsigned long long)rhsa->base_address, |
| 290 | rhsa->proximity_domain); |
| 291 | break; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 292 | } |
| 293 | } |
| 294 | |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 295 | /** |
| 296 | * dmar_table_detect - checks to see if the platform supports DMAR devices |
| 297 | */ |
| 298 | static int __init dmar_table_detect(void) |
| 299 | { |
| 300 | acpi_status status = AE_OK; |
| 301 | |
| 302 | /* if we could find DMAR table, then there are DMAR devices */ |
Yinghai Lu | 8e1568f | 2009-02-11 01:06:59 -0800 | [diff] [blame] | 303 | status = acpi_get_table_with_size(ACPI_SIG_DMAR, 0, |
| 304 | (struct acpi_table_header **)&dmar_tbl, |
| 305 | &dmar_tbl_size); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 306 | |
| 307 | if (ACPI_SUCCESS(status) && !dmar_tbl) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 308 | pr_warn("Unable to map DMAR\n"); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 309 | status = AE_NOT_FOUND; |
| 310 | } |
| 311 | |
| 312 | return (ACPI_SUCCESS(status) ? 1 : 0); |
| 313 | } |
Suresh Siddha | aaa9d1d | 2008-07-10 11:16:38 -0700 | [diff] [blame] | 314 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 315 | /** |
| 316 | * parse_dmar_table - parses the DMA reporting table |
| 317 | */ |
| 318 | static int __init |
| 319 | parse_dmar_table(void) |
| 320 | { |
| 321 | struct acpi_table_dmar *dmar; |
| 322 | struct acpi_dmar_header *entry_header; |
| 323 | int ret = 0; |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 324 | int drhd_count = 0; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 325 | |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 326 | /* |
| 327 | * Do it again, earlier dmar_tbl mapping could be mapped with |
| 328 | * fixed map. |
| 329 | */ |
| 330 | dmar_table_detect(); |
| 331 | |
Joseph Cihula | a59b50e | 2009-06-30 19:31:10 -0700 | [diff] [blame] | 332 | /* |
| 333 | * ACPI tables may not be DMA protected by tboot, so use DMAR copy |
| 334 | * SINIT saved in SinitMleData in TXT heap (which is DMA protected) |
| 335 | */ |
| 336 | dmar_tbl = tboot_get_dmar_table(dmar_tbl); |
| 337 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 338 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
| 339 | if (!dmar) |
| 340 | return -ENODEV; |
| 341 | |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 342 | if (dmar->width < PAGE_SHIFT - 1) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 343 | pr_warn("Invalid DMAR haw\n"); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 344 | return -EINVAL; |
| 345 | } |
| 346 | |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 347 | pr_info("Host address width %d\n", dmar->width + 1); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 348 | |
| 349 | entry_header = (struct acpi_dmar_header *)(dmar + 1); |
| 350 | while (((unsigned long)entry_header) < |
| 351 | (((unsigned long)dmar) + dmar_tbl->length)) { |
Tony Battersby | 084eb96 | 2009-02-11 13:24:19 -0800 | [diff] [blame] | 352 | /* Avoid looping forever on bad ACPI tables */ |
| 353 | if (entry_header->length == 0) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 354 | pr_warn("Invalid 0-length structure\n"); |
Tony Battersby | 084eb96 | 2009-02-11 13:24:19 -0800 | [diff] [blame] | 355 | ret = -EINVAL; |
| 356 | break; |
| 357 | } |
| 358 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 359 | dmar_table_print_dmar_entry(entry_header); |
| 360 | |
| 361 | switch (entry_header->type) { |
| 362 | case ACPI_DMAR_TYPE_HARDWARE_UNIT: |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 363 | drhd_count++; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 364 | ret = dmar_parse_one_drhd(entry_header); |
| 365 | break; |
| 366 | case ACPI_DMAR_TYPE_RESERVED_MEMORY: |
| 367 | ret = dmar_parse_one_rmrr(entry_header); |
| 368 | break; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 369 | case ACPI_DMAR_TYPE_ATSR: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 370 | ret = dmar_parse_one_atsr(entry_header); |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 371 | break; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 372 | case ACPI_DMAR_HARDWARE_AFFINITY: |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 373 | #ifdef CONFIG_ACPI_NUMA |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 374 | ret = dmar_parse_one_rhsa(entry_header); |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 375 | #endif |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 376 | break; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 377 | default: |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 378 | pr_warn("Unknown DMAR structure type %d\n", |
Roland Dreier | 4de75cf | 2009-09-24 01:01:29 +0100 | [diff] [blame] | 379 | entry_header->type); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 380 | ret = 0; /* for forward compatibility */ |
| 381 | break; |
| 382 | } |
| 383 | if (ret) |
| 384 | break; |
| 385 | |
| 386 | entry_header = ((void *)entry_header + entry_header->length); |
| 387 | } |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 388 | if (drhd_count == 0) |
| 389 | pr_warn(FW_BUG "No DRHD structure found in DMAR table\n"); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 390 | return ret; |
| 391 | } |
| 392 | |
Yinghai | dda5654 | 2010-04-09 01:07:55 +0100 | [diff] [blame] | 393 | static int dmar_pci_device_match(struct pci_dev *devices[], int cnt, |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 394 | struct pci_dev *dev) |
| 395 | { |
| 396 | int index; |
| 397 | |
| 398 | while (dev) { |
| 399 | for (index = 0; index < cnt; index++) |
| 400 | if (dev == devices[index]) |
| 401 | return 1; |
| 402 | |
| 403 | /* Check our parent */ |
| 404 | dev = dev->bus->self; |
| 405 | } |
| 406 | |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | struct dmar_drhd_unit * |
| 411 | dmar_find_matched_drhd_unit(struct pci_dev *dev) |
| 412 | { |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 413 | struct dmar_drhd_unit *dmaru = NULL; |
| 414 | struct acpi_dmar_hardware_unit *drhd; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 415 | |
Yinghai | dda5654 | 2010-04-09 01:07:55 +0100 | [diff] [blame] | 416 | dev = pci_physfn(dev); |
| 417 | |
Yijing Wang | 8b161f0 | 2013-10-31 17:25:16 +0800 | [diff] [blame] | 418 | for_each_drhd_unit(dmaru) { |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 419 | drhd = container_of(dmaru->hdr, |
| 420 | struct acpi_dmar_hardware_unit, |
| 421 | header); |
| 422 | |
| 423 | if (dmaru->include_all && |
| 424 | drhd->segment == pci_domain_nr(dev->bus)) |
| 425 | return dmaru; |
| 426 | |
| 427 | if (dmar_pci_device_match(dmaru->devices, |
| 428 | dmaru->devices_cnt, dev)) |
| 429 | return dmaru; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | return NULL; |
| 433 | } |
| 434 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 435 | int __init dmar_dev_scope_init(void) |
| 436 | { |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 437 | static int dmar_dev_scope_initialized; |
Suresh Siddha | 04e2ea6 | 2008-09-03 16:58:34 -0700 | [diff] [blame] | 438 | struct dmar_drhd_unit *drhd, *drhd_n; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 439 | int ret = -ENODEV; |
| 440 | |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 441 | if (dmar_dev_scope_initialized) |
| 442 | return dmar_dev_scope_initialized; |
| 443 | |
Suresh Siddha | 318fe7d | 2011-08-23 17:05:20 -0700 | [diff] [blame] | 444 | if (list_empty(&dmar_drhd_units)) |
| 445 | goto fail; |
| 446 | |
Suresh Siddha | 04e2ea6 | 2008-09-03 16:58:34 -0700 | [diff] [blame] | 447 | list_for_each_entry_safe(drhd, drhd_n, &dmar_drhd_units, list) { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 448 | ret = dmar_parse_dev(drhd); |
| 449 | if (ret) |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 450 | goto fail; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Suresh Siddha | 318fe7d | 2011-08-23 17:05:20 -0700 | [diff] [blame] | 453 | ret = dmar_parse_rmrr_atsr_dev(); |
| 454 | if (ret) |
| 455 | goto fail; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 456 | |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 457 | dmar_dev_scope_initialized = 1; |
| 458 | return 0; |
| 459 | |
| 460 | fail: |
| 461 | dmar_dev_scope_initialized = ret; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 462 | return ret; |
| 463 | } |
| 464 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 465 | |
| 466 | int __init dmar_table_init(void) |
| 467 | { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 468 | static int dmar_table_initialized; |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 469 | int ret; |
| 470 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 471 | if (dmar_table_initialized) |
| 472 | return 0; |
| 473 | |
| 474 | dmar_table_initialized = 1; |
| 475 | |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 476 | ret = parse_dmar_table(); |
| 477 | if (ret) { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 478 | if (ret != -ENODEV) |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 479 | pr_info("parse DMAR table failure.\n"); |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 480 | return ret; |
| 481 | } |
| 482 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 483 | if (list_empty(&dmar_drhd_units)) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 484 | pr_info("No DMAR devices found\n"); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 485 | return -ENODEV; |
| 486 | } |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 487 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 488 | return 0; |
| 489 | } |
| 490 | |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 491 | static void warn_invalid_dmar(u64 addr, const char *message) |
| 492 | { |
Ben Hutchings | fd0c889 | 2010-04-03 19:38:43 +0100 | [diff] [blame] | 493 | WARN_TAINT_ONCE( |
| 494 | 1, TAINT_FIRMWARE_WORKAROUND, |
| 495 | "Your BIOS is broken; DMAR reported at address %llx%s!\n" |
| 496 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", |
| 497 | addr, message, |
| 498 | dmi_get_system_info(DMI_BIOS_VENDOR), |
| 499 | dmi_get_system_info(DMI_BIOS_VERSION), |
| 500 | dmi_get_system_info(DMI_PRODUCT_VERSION)); |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 501 | } |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 502 | |
Rashika Kheria | 21004dc | 2013-12-18 12:01:46 +0530 | [diff] [blame] | 503 | static int __init check_zero_address(void) |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 504 | { |
| 505 | struct acpi_table_dmar *dmar; |
| 506 | struct acpi_dmar_header *entry_header; |
| 507 | struct acpi_dmar_hardware_unit *drhd; |
| 508 | |
| 509 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
| 510 | entry_header = (struct acpi_dmar_header *)(dmar + 1); |
| 511 | |
| 512 | while (((unsigned long)entry_header) < |
| 513 | (((unsigned long)dmar) + dmar_tbl->length)) { |
| 514 | /* Avoid looping forever on bad ACPI tables */ |
| 515 | if (entry_header->length == 0) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 516 | pr_warn("Invalid 0-length structure\n"); |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | if (entry_header->type == ACPI_DMAR_TYPE_HARDWARE_UNIT) { |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 521 | void __iomem *addr; |
| 522 | u64 cap, ecap; |
| 523 | |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 524 | drhd = (void *)entry_header; |
| 525 | if (!drhd->address) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 526 | warn_invalid_dmar(0, ""); |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 527 | goto failed; |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 528 | } |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 529 | |
| 530 | addr = early_ioremap(drhd->address, VTD_PAGE_SIZE); |
| 531 | if (!addr ) { |
| 532 | printk("IOMMU: can't validate: %llx\n", drhd->address); |
| 533 | goto failed; |
| 534 | } |
| 535 | cap = dmar_readq(addr + DMAR_CAP_REG); |
| 536 | ecap = dmar_readq(addr + DMAR_ECAP_REG); |
| 537 | early_iounmap(addr, VTD_PAGE_SIZE); |
| 538 | if (cap == (uint64_t)-1 && ecap == (uint64_t)-1) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 539 | warn_invalid_dmar(drhd->address, |
| 540 | " returns all ones"); |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 541 | goto failed; |
| 542 | } |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | entry_header = ((void *)entry_header + entry_header->length); |
| 546 | } |
| 547 | return 1; |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 548 | |
| 549 | failed: |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 550 | return 0; |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 551 | } |
| 552 | |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 553 | int __init detect_intel_iommu(void) |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 554 | { |
| 555 | int ret; |
| 556 | |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 557 | ret = dmar_table_detect(); |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 558 | if (ret) |
| 559 | ret = check_zero_address(); |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 560 | { |
Linus Torvalds | 11bd04f | 2009-12-11 12:18:16 -0800 | [diff] [blame] | 561 | if (ret && !no_iommu && !iommu_detected && !dmar_disabled) { |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 562 | iommu_detected = 1; |
Chris Wright | 5d990b6 | 2009-12-04 12:15:21 -0800 | [diff] [blame] | 563 | /* Make sure ACS will be enabled */ |
| 564 | pci_request_acs(); |
| 565 | } |
Suresh Siddha | f5d1b97 | 2011-08-23 17:05:22 -0700 | [diff] [blame] | 566 | |
FUJITA Tomonori | 9d5ce73 | 2009-11-10 19:46:16 +0900 | [diff] [blame] | 567 | #ifdef CONFIG_X86 |
| 568 | if (ret) |
| 569 | x86_init.iommu.iommu_init = intel_iommu_init; |
| 570 | #endif |
Youquan Song | cacd421 | 2008-10-16 16:31:57 -0700 | [diff] [blame] | 571 | } |
Yinghai Lu | 8e1568f | 2009-02-11 01:06:59 -0800 | [diff] [blame] | 572 | early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 573 | dmar_tbl = NULL; |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 574 | |
Konrad Rzeszutek Wilk | 4db77ff | 2010-08-26 13:58:04 -0400 | [diff] [blame] | 575 | return ret ? 1 : -ENODEV; |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 579 | static void unmap_iommu(struct intel_iommu *iommu) |
| 580 | { |
| 581 | iounmap(iommu->reg); |
| 582 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * map_iommu: map the iommu's registers |
| 587 | * @iommu: the iommu to map |
| 588 | * @phys_addr: the physical address of the base resgister |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 589 | * |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 590 | * Memory map the iommu's registers. Start w/ a single page, and |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 591 | * possibly expand if that turns out to be insufficent. |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 592 | */ |
| 593 | static int map_iommu(struct intel_iommu *iommu, u64 phys_addr) |
| 594 | { |
| 595 | int map_size, err=0; |
| 596 | |
| 597 | iommu->reg_phys = phys_addr; |
| 598 | iommu->reg_size = VTD_PAGE_SIZE; |
| 599 | |
| 600 | if (!request_mem_region(iommu->reg_phys, iommu->reg_size, iommu->name)) { |
| 601 | pr_err("IOMMU: can't reserve memory\n"); |
| 602 | err = -EBUSY; |
| 603 | goto out; |
| 604 | } |
| 605 | |
| 606 | iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size); |
| 607 | if (!iommu->reg) { |
| 608 | pr_err("IOMMU: can't map the region\n"); |
| 609 | err = -ENOMEM; |
| 610 | goto release; |
| 611 | } |
| 612 | |
| 613 | iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG); |
| 614 | iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG); |
| 615 | |
| 616 | if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) { |
| 617 | err = -EINVAL; |
| 618 | warn_invalid_dmar(phys_addr, " returns all ones"); |
| 619 | goto unmap; |
| 620 | } |
| 621 | |
| 622 | /* the registers might be more than one page */ |
| 623 | map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap), |
| 624 | cap_max_fault_reg_offset(iommu->cap)); |
| 625 | map_size = VTD_PAGE_ALIGN(map_size); |
| 626 | if (map_size > iommu->reg_size) { |
| 627 | iounmap(iommu->reg); |
| 628 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 629 | iommu->reg_size = map_size; |
| 630 | if (!request_mem_region(iommu->reg_phys, iommu->reg_size, |
| 631 | iommu->name)) { |
| 632 | pr_err("IOMMU: can't reserve memory\n"); |
| 633 | err = -EBUSY; |
| 634 | goto out; |
| 635 | } |
| 636 | iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size); |
| 637 | if (!iommu->reg) { |
| 638 | pr_err("IOMMU: can't map the region\n"); |
| 639 | err = -ENOMEM; |
| 640 | goto release; |
| 641 | } |
| 642 | } |
| 643 | err = 0; |
| 644 | goto out; |
| 645 | |
| 646 | unmap: |
| 647 | iounmap(iommu->reg); |
| 648 | release: |
| 649 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 650 | out: |
| 651 | return err; |
| 652 | } |
| 653 | |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame^] | 654 | static int alloc_iommu(struct dmar_drhd_unit *drhd) |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 655 | { |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 656 | struct intel_iommu *iommu; |
Takao Indoh | 3a93c84 | 2013-04-23 17:35:03 +0900 | [diff] [blame] | 657 | u32 ver, sts; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 658 | static int iommu_allocated = 0; |
Joerg Roedel | 43f7392 | 2009-01-03 23:56:27 +0100 | [diff] [blame] | 659 | int agaw = 0; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 660 | int msagaw = 0; |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 661 | int err; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 662 | |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 663 | if (!drhd->reg_base_addr) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 664 | warn_invalid_dmar(0, ""); |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 665 | return -EINVAL; |
| 666 | } |
| 667 | |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 668 | iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); |
| 669 | if (!iommu) |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 670 | return -ENOMEM; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 671 | |
| 672 | iommu->seq_id = iommu_allocated++; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 673 | sprintf (iommu->name, "dmar%d", iommu->seq_id); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 674 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 675 | err = map_iommu(iommu, drhd->reg_base_addr); |
| 676 | if (err) { |
| 677 | pr_err("IOMMU: failed to map %s\n", iommu->name); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 678 | goto error; |
| 679 | } |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 680 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 681 | err = -EINVAL; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 682 | agaw = iommu_calculate_agaw(iommu); |
| 683 | if (agaw < 0) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 684 | pr_err("Cannot get a valid agaw for iommu (seq_id = %d)\n", |
| 685 | iommu->seq_id); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 686 | goto err_unmap; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 687 | } |
| 688 | msagaw = iommu_calculate_max_sagaw(iommu); |
| 689 | if (msagaw < 0) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 690 | pr_err("Cannot get a valid max agaw for iommu (seq_id = %d)\n", |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 691 | iommu->seq_id); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 692 | goto err_unmap; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 693 | } |
| 694 | iommu->agaw = agaw; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 695 | iommu->msagaw = msagaw; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 696 | |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 697 | iommu->node = -1; |
| 698 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 699 | ver = readl(iommu->reg + DMAR_VER_REG); |
Yinghai Lu | 680a752 | 2010-04-08 19:58:23 +0100 | [diff] [blame] | 700 | pr_info("IOMMU %d: reg_base_addr %llx ver %d:%d cap %llx ecap %llx\n", |
| 701 | iommu->seq_id, |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 702 | (unsigned long long)drhd->reg_base_addr, |
| 703 | DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver), |
| 704 | (unsigned long long)iommu->cap, |
| 705 | (unsigned long long)iommu->ecap); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 706 | |
Takao Indoh | 3a93c84 | 2013-04-23 17:35:03 +0900 | [diff] [blame] | 707 | /* Reflect status in gcmd */ |
| 708 | sts = readl(iommu->reg + DMAR_GSTS_REG); |
| 709 | if (sts & DMA_GSTS_IRES) |
| 710 | iommu->gcmd |= DMA_GCMD_IRE; |
| 711 | if (sts & DMA_GSTS_TES) |
| 712 | iommu->gcmd |= DMA_GCMD_TE; |
| 713 | if (sts & DMA_GSTS_QIES) |
| 714 | iommu->gcmd |= DMA_GCMD_QIE; |
| 715 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 716 | raw_spin_lock_init(&iommu->register_lock); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 717 | |
| 718 | drhd->iommu = iommu; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 719 | return 0; |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 720 | |
| 721 | err_unmap: |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 722 | unmap_iommu(iommu); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 723 | error: |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 724 | kfree(iommu); |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 725 | return err; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | void free_iommu(struct intel_iommu *iommu) |
| 729 | { |
| 730 | if (!iommu) |
| 731 | return; |
| 732 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 733 | free_dmar_iommu(iommu); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 734 | |
| 735 | if (iommu->reg) |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 736 | unmap_iommu(iommu); |
| 737 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 738 | kfree(iommu); |
| 739 | } |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 740 | |
| 741 | /* |
| 742 | * Reclaim all the submitted descriptors which have completed its work. |
| 743 | */ |
| 744 | static inline void reclaim_free_desc(struct q_inval *qi) |
| 745 | { |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 746 | while (qi->desc_status[qi->free_tail] == QI_DONE || |
| 747 | qi->desc_status[qi->free_tail] == QI_ABORT) { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 748 | qi->desc_status[qi->free_tail] = QI_FREE; |
| 749 | qi->free_tail = (qi->free_tail + 1) % QI_LENGTH; |
| 750 | qi->free_cnt++; |
| 751 | } |
| 752 | } |
| 753 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 754 | static int qi_check_fault(struct intel_iommu *iommu, int index) |
| 755 | { |
| 756 | u32 fault; |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 757 | int head, tail; |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 758 | struct q_inval *qi = iommu->qi; |
| 759 | int wait_index = (index + 1) % QI_LENGTH; |
| 760 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 761 | if (qi->desc_status[wait_index] == QI_ABORT) |
| 762 | return -EAGAIN; |
| 763 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 764 | fault = readl(iommu->reg + DMAR_FSTS_REG); |
| 765 | |
| 766 | /* |
| 767 | * If IQE happens, the head points to the descriptor associated |
| 768 | * with the error. No new descriptors are fetched until the IQE |
| 769 | * is cleared. |
| 770 | */ |
| 771 | if (fault & DMA_FSTS_IQE) { |
| 772 | head = readl(iommu->reg + DMAR_IQH_REG); |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 773 | if ((head >> DMAR_IQ_SHIFT) == index) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 774 | pr_err("VT-d detected invalid descriptor: " |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 775 | "low=%llx, high=%llx\n", |
| 776 | (unsigned long long)qi->desc[index].low, |
| 777 | (unsigned long long)qi->desc[index].high); |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 778 | memcpy(&qi->desc[index], &qi->desc[wait_index], |
| 779 | sizeof(struct qi_desc)); |
| 780 | __iommu_flush_cache(iommu, &qi->desc[index], |
| 781 | sizeof(struct qi_desc)); |
| 782 | writel(DMA_FSTS_IQE, iommu->reg + DMAR_FSTS_REG); |
| 783 | return -EINVAL; |
| 784 | } |
| 785 | } |
| 786 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 787 | /* |
| 788 | * If ITE happens, all pending wait_desc commands are aborted. |
| 789 | * No new descriptors are fetched until the ITE is cleared. |
| 790 | */ |
| 791 | if (fault & DMA_FSTS_ITE) { |
| 792 | head = readl(iommu->reg + DMAR_IQH_REG); |
| 793 | head = ((head >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH; |
| 794 | head |= 1; |
| 795 | tail = readl(iommu->reg + DMAR_IQT_REG); |
| 796 | tail = ((tail >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH; |
| 797 | |
| 798 | writel(DMA_FSTS_ITE, iommu->reg + DMAR_FSTS_REG); |
| 799 | |
| 800 | do { |
| 801 | if (qi->desc_status[head] == QI_IN_USE) |
| 802 | qi->desc_status[head] = QI_ABORT; |
| 803 | head = (head - 2 + QI_LENGTH) % QI_LENGTH; |
| 804 | } while (head != tail); |
| 805 | |
| 806 | if (qi->desc_status[wait_index] == QI_ABORT) |
| 807 | return -EAGAIN; |
| 808 | } |
| 809 | |
| 810 | if (fault & DMA_FSTS_ICE) |
| 811 | writel(DMA_FSTS_ICE, iommu->reg + DMAR_FSTS_REG); |
| 812 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 813 | return 0; |
| 814 | } |
| 815 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 816 | /* |
| 817 | * Submit the queued invalidation descriptor to the remapping |
| 818 | * hardware unit and wait for its completion. |
| 819 | */ |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 820 | int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu) |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 821 | { |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 822 | int rc; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 823 | struct q_inval *qi = iommu->qi; |
| 824 | struct qi_desc *hw, wait_desc; |
| 825 | int wait_index, index; |
| 826 | unsigned long flags; |
| 827 | |
| 828 | if (!qi) |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 829 | return 0; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 830 | |
| 831 | hw = qi->desc; |
| 832 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 833 | restart: |
| 834 | rc = 0; |
| 835 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 836 | raw_spin_lock_irqsave(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 837 | while (qi->free_cnt < 3) { |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 838 | raw_spin_unlock_irqrestore(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 839 | cpu_relax(); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 840 | raw_spin_lock_irqsave(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | index = qi->free_head; |
| 844 | wait_index = (index + 1) % QI_LENGTH; |
| 845 | |
| 846 | qi->desc_status[index] = qi->desc_status[wait_index] = QI_IN_USE; |
| 847 | |
| 848 | hw[index] = *desc; |
| 849 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 850 | wait_desc.low = QI_IWD_STATUS_DATA(QI_DONE) | |
| 851 | QI_IWD_STATUS_WRITE | QI_IWD_TYPE; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 852 | wait_desc.high = virt_to_phys(&qi->desc_status[wait_index]); |
| 853 | |
| 854 | hw[wait_index] = wait_desc; |
| 855 | |
| 856 | __iommu_flush_cache(iommu, &hw[index], sizeof(struct qi_desc)); |
| 857 | __iommu_flush_cache(iommu, &hw[wait_index], sizeof(struct qi_desc)); |
| 858 | |
| 859 | qi->free_head = (qi->free_head + 2) % QI_LENGTH; |
| 860 | qi->free_cnt -= 2; |
| 861 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 862 | /* |
| 863 | * update the HW tail register indicating the presence of |
| 864 | * new descriptors. |
| 865 | */ |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 866 | writel(qi->free_head << DMAR_IQ_SHIFT, iommu->reg + DMAR_IQT_REG); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 867 | |
| 868 | while (qi->desc_status[wait_index] != QI_DONE) { |
Suresh Siddha | f05810c | 2008-10-16 16:31:54 -0700 | [diff] [blame] | 869 | /* |
| 870 | * We will leave the interrupts disabled, to prevent interrupt |
| 871 | * context to queue another cmd while a cmd is already submitted |
| 872 | * and waiting for completion on this cpu. This is to avoid |
| 873 | * a deadlock where the interrupt context can wait indefinitely |
| 874 | * for free slots in the queue. |
| 875 | */ |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 876 | rc = qi_check_fault(iommu, index); |
| 877 | if (rc) |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 878 | break; |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 879 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 880 | raw_spin_unlock(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 881 | cpu_relax(); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 882 | raw_spin_lock(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 883 | } |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 884 | |
| 885 | qi->desc_status[index] = QI_DONE; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 886 | |
| 887 | reclaim_free_desc(qi); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 888 | raw_spin_unlock_irqrestore(&qi->q_lock, flags); |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 889 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 890 | if (rc == -EAGAIN) |
| 891 | goto restart; |
| 892 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 893 | return rc; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | /* |
| 897 | * Flush the global interrupt entry cache. |
| 898 | */ |
| 899 | void qi_global_iec(struct intel_iommu *iommu) |
| 900 | { |
| 901 | struct qi_desc desc; |
| 902 | |
| 903 | desc.low = QI_IEC_TYPE; |
| 904 | desc.high = 0; |
| 905 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 906 | /* should never fail */ |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 907 | qi_submit_sync(&desc, iommu); |
| 908 | } |
| 909 | |
David Woodhouse | 4c25a2c | 2009-05-10 17:16:06 +0100 | [diff] [blame] | 910 | void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm, |
| 911 | u64 type) |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 912 | { |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 913 | struct qi_desc desc; |
| 914 | |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 915 | desc.low = QI_CC_FM(fm) | QI_CC_SID(sid) | QI_CC_DID(did) |
| 916 | | QI_CC_GRAN(type) | QI_CC_TYPE; |
| 917 | desc.high = 0; |
| 918 | |
David Woodhouse | 4c25a2c | 2009-05-10 17:16:06 +0100 | [diff] [blame] | 919 | qi_submit_sync(&desc, iommu); |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 920 | } |
| 921 | |
David Woodhouse | 1f0ef2a | 2009-05-10 19:58:49 +0100 | [diff] [blame] | 922 | void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr, |
| 923 | unsigned int size_order, u64 type) |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 924 | { |
| 925 | u8 dw = 0, dr = 0; |
| 926 | |
| 927 | struct qi_desc desc; |
| 928 | int ih = 0; |
| 929 | |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 930 | if (cap_write_drain(iommu->cap)) |
| 931 | dw = 1; |
| 932 | |
| 933 | if (cap_read_drain(iommu->cap)) |
| 934 | dr = 1; |
| 935 | |
| 936 | desc.low = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw) |
| 937 | | QI_IOTLB_GRAN(type) | QI_IOTLB_TYPE; |
| 938 | desc.high = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih) |
| 939 | | QI_IOTLB_AM(size_order); |
| 940 | |
David Woodhouse | 1f0ef2a | 2009-05-10 19:58:49 +0100 | [diff] [blame] | 941 | qi_submit_sync(&desc, iommu); |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 942 | } |
| 943 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 944 | void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep, |
| 945 | u64 addr, unsigned mask) |
| 946 | { |
| 947 | struct qi_desc desc; |
| 948 | |
| 949 | if (mask) { |
| 950 | BUG_ON(addr & ((1 << (VTD_PAGE_SHIFT + mask)) - 1)); |
| 951 | addr |= (1 << (VTD_PAGE_SHIFT + mask - 1)) - 1; |
| 952 | desc.high = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE; |
| 953 | } else |
| 954 | desc.high = QI_DEV_IOTLB_ADDR(addr); |
| 955 | |
| 956 | if (qdep >= QI_DEV_IOTLB_MAX_INVS) |
| 957 | qdep = 0; |
| 958 | |
| 959 | desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) | |
| 960 | QI_DIOTLB_TYPE; |
| 961 | |
| 962 | qi_submit_sync(&desc, iommu); |
| 963 | } |
| 964 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 965 | /* |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 966 | * Disable Queued Invalidation interface. |
| 967 | */ |
| 968 | void dmar_disable_qi(struct intel_iommu *iommu) |
| 969 | { |
| 970 | unsigned long flags; |
| 971 | u32 sts; |
| 972 | cycles_t start_time = get_cycles(); |
| 973 | |
| 974 | if (!ecap_qis(iommu->ecap)) |
| 975 | return; |
| 976 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 977 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 978 | |
| 979 | sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); |
| 980 | if (!(sts & DMA_GSTS_QIES)) |
| 981 | goto end; |
| 982 | |
| 983 | /* |
| 984 | * Give a chance to HW to complete the pending invalidation requests. |
| 985 | */ |
| 986 | while ((readl(iommu->reg + DMAR_IQT_REG) != |
| 987 | readl(iommu->reg + DMAR_IQH_REG)) && |
| 988 | (DMAR_OPERATION_TIMEOUT > (get_cycles() - start_time))) |
| 989 | cpu_relax(); |
| 990 | |
| 991 | iommu->gcmd &= ~DMA_GCMD_QIE; |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 992 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); |
| 993 | |
| 994 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, |
| 995 | !(sts & DMA_GSTS_QIES), sts); |
| 996 | end: |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 997 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | /* |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1001 | * Enable queued invalidation. |
| 1002 | */ |
| 1003 | static void __dmar_enable_qi(struct intel_iommu *iommu) |
| 1004 | { |
David Woodhouse | c416daa | 2009-05-10 20:30:58 +0100 | [diff] [blame] | 1005 | u32 sts; |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1006 | unsigned long flags; |
| 1007 | struct q_inval *qi = iommu->qi; |
| 1008 | |
| 1009 | qi->free_head = qi->free_tail = 0; |
| 1010 | qi->free_cnt = QI_LENGTH; |
| 1011 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1012 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1013 | |
| 1014 | /* write zero to the tail reg */ |
| 1015 | writel(0, iommu->reg + DMAR_IQT_REG); |
| 1016 | |
| 1017 | dmar_writeq(iommu->reg + DMAR_IQA_REG, virt_to_phys(qi->desc)); |
| 1018 | |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1019 | iommu->gcmd |= DMA_GCMD_QIE; |
David Woodhouse | c416daa | 2009-05-10 20:30:58 +0100 | [diff] [blame] | 1020 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1021 | |
| 1022 | /* Make sure hardware complete it */ |
| 1023 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_QIES), sts); |
| 1024 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1025 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | /* |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1029 | * Enable Queued Invalidation interface. This is a must to support |
| 1030 | * interrupt-remapping. Also used by DMA-remapping, which replaces |
| 1031 | * register based IOTLB invalidation. |
| 1032 | */ |
| 1033 | int dmar_enable_qi(struct intel_iommu *iommu) |
| 1034 | { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1035 | struct q_inval *qi; |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1036 | struct page *desc_page; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1037 | |
| 1038 | if (!ecap_qis(iommu->ecap)) |
| 1039 | return -ENOENT; |
| 1040 | |
| 1041 | /* |
| 1042 | * queued invalidation is already setup and enabled. |
| 1043 | */ |
| 1044 | if (iommu->qi) |
| 1045 | return 0; |
| 1046 | |
Suresh Siddha | fa4b57c | 2009-03-16 17:05:05 -0700 | [diff] [blame] | 1047 | iommu->qi = kmalloc(sizeof(*qi), GFP_ATOMIC); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1048 | if (!iommu->qi) |
| 1049 | return -ENOMEM; |
| 1050 | |
| 1051 | qi = iommu->qi; |
| 1052 | |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1053 | |
| 1054 | desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO, 0); |
| 1055 | if (!desc_page) { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1056 | kfree(qi); |
| 1057 | iommu->qi = 0; |
| 1058 | return -ENOMEM; |
| 1059 | } |
| 1060 | |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1061 | qi->desc = page_address(desc_page); |
| 1062 | |
Hannes Reinecke | 37a4071 | 2013-02-06 09:50:10 +0100 | [diff] [blame] | 1063 | qi->desc_status = kzalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1064 | if (!qi->desc_status) { |
| 1065 | free_page((unsigned long) qi->desc); |
| 1066 | kfree(qi); |
| 1067 | iommu->qi = 0; |
| 1068 | return -ENOMEM; |
| 1069 | } |
| 1070 | |
| 1071 | qi->free_head = qi->free_tail = 0; |
| 1072 | qi->free_cnt = QI_LENGTH; |
| 1073 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 1074 | raw_spin_lock_init(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1075 | |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1076 | __dmar_enable_qi(iommu); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1077 | |
| 1078 | return 0; |
| 1079 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1080 | |
| 1081 | /* iommu interrupt handling. Most stuff are MSI-like. */ |
| 1082 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1083 | enum faulttype { |
| 1084 | DMA_REMAP, |
| 1085 | INTR_REMAP, |
| 1086 | UNKNOWN, |
| 1087 | }; |
| 1088 | |
| 1089 | static const char *dma_remap_fault_reasons[] = |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1090 | { |
| 1091 | "Software", |
| 1092 | "Present bit in root entry is clear", |
| 1093 | "Present bit in context entry is clear", |
| 1094 | "Invalid context entry", |
| 1095 | "Access beyond MGAW", |
| 1096 | "PTE Write access is not set", |
| 1097 | "PTE Read access is not set", |
| 1098 | "Next page table ptr is invalid", |
| 1099 | "Root table address invalid", |
| 1100 | "Context table ptr is invalid", |
| 1101 | "non-zero reserved fields in RTP", |
| 1102 | "non-zero reserved fields in CTP", |
| 1103 | "non-zero reserved fields in PTE", |
Li, Zhen-Hua | 4ecccd9 | 2013-03-06 10:43:17 +0800 | [diff] [blame] | 1104 | "PCE for translation request specifies blocking", |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1105 | }; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1106 | |
Suresh Siddha | 95a02e9 | 2012-03-30 11:47:07 -0700 | [diff] [blame] | 1107 | static const char *irq_remap_fault_reasons[] = |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1108 | { |
| 1109 | "Detected reserved fields in the decoded interrupt-remapped request", |
| 1110 | "Interrupt index exceeded the interrupt-remapping table size", |
| 1111 | "Present field in the IRTE entry is clear", |
| 1112 | "Error accessing interrupt-remapping table pointed by IRTA_REG", |
| 1113 | "Detected reserved fields in the IRTE entry", |
| 1114 | "Blocked a compatibility format interrupt request", |
| 1115 | "Blocked an interrupt request due to source-id verification failure", |
| 1116 | }; |
| 1117 | |
Rashika Kheria | 21004dc | 2013-12-18 12:01:46 +0530 | [diff] [blame] | 1118 | static const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1119 | { |
Dan Carpenter | fefe1ed | 2012-05-13 20:09:38 +0300 | [diff] [blame] | 1120 | if (fault_reason >= 0x20 && (fault_reason - 0x20 < |
| 1121 | ARRAY_SIZE(irq_remap_fault_reasons))) { |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1122 | *fault_type = INTR_REMAP; |
Suresh Siddha | 95a02e9 | 2012-03-30 11:47:07 -0700 | [diff] [blame] | 1123 | return irq_remap_fault_reasons[fault_reason - 0x20]; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1124 | } else if (fault_reason < ARRAY_SIZE(dma_remap_fault_reasons)) { |
| 1125 | *fault_type = DMA_REMAP; |
| 1126 | return dma_remap_fault_reasons[fault_reason]; |
| 1127 | } else { |
| 1128 | *fault_type = UNKNOWN; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1129 | return "Unknown"; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1130 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1131 | } |
| 1132 | |
Thomas Gleixner | 5c2837f | 2010-09-28 17:15:11 +0200 | [diff] [blame] | 1133 | void dmar_msi_unmask(struct irq_data *data) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1134 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1135 | struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1136 | unsigned long flag; |
| 1137 | |
| 1138 | /* unmask it */ |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1139 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1140 | writel(0, iommu->reg + DMAR_FECTL_REG); |
| 1141 | /* Read a reg to force flush the post write */ |
| 1142 | readl(iommu->reg + DMAR_FECTL_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1143 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1144 | } |
| 1145 | |
Thomas Gleixner | 5c2837f | 2010-09-28 17:15:11 +0200 | [diff] [blame] | 1146 | void dmar_msi_mask(struct irq_data *data) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1147 | { |
| 1148 | unsigned long flag; |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1149 | struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1150 | |
| 1151 | /* mask it */ |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1152 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1153 | writel(DMA_FECTL_IM, iommu->reg + DMAR_FECTL_REG); |
| 1154 | /* Read a reg to force flush the post write */ |
| 1155 | readl(iommu->reg + DMAR_FECTL_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1156 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
| 1159 | void dmar_msi_write(int irq, struct msi_msg *msg) |
| 1160 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1161 | struct intel_iommu *iommu = irq_get_handler_data(irq); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1162 | unsigned long flag; |
| 1163 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1164 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1165 | writel(msg->data, iommu->reg + DMAR_FEDATA_REG); |
| 1166 | writel(msg->address_lo, iommu->reg + DMAR_FEADDR_REG); |
| 1167 | writel(msg->address_hi, iommu->reg + DMAR_FEUADDR_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1168 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
| 1171 | void dmar_msi_read(int irq, struct msi_msg *msg) |
| 1172 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1173 | struct intel_iommu *iommu = irq_get_handler_data(irq); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1174 | unsigned long flag; |
| 1175 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1176 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1177 | msg->data = readl(iommu->reg + DMAR_FEDATA_REG); |
| 1178 | msg->address_lo = readl(iommu->reg + DMAR_FEADDR_REG); |
| 1179 | msg->address_hi = readl(iommu->reg + DMAR_FEUADDR_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1180 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1181 | } |
| 1182 | |
| 1183 | static int dmar_fault_do_one(struct intel_iommu *iommu, int type, |
| 1184 | u8 fault_reason, u16 source_id, unsigned long long addr) |
| 1185 | { |
| 1186 | const char *reason; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1187 | int fault_type; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1188 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1189 | reason = dmar_get_fault_reason(fault_reason, &fault_type); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1190 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1191 | if (fault_type == INTR_REMAP) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1192 | pr_err("INTR-REMAP: Request device [[%02x:%02x.%d] " |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1193 | "fault index %llx\n" |
| 1194 | "INTR-REMAP:[fault reason %02d] %s\n", |
| 1195 | (source_id >> 8), PCI_SLOT(source_id & 0xFF), |
| 1196 | PCI_FUNC(source_id & 0xFF), addr >> 48, |
| 1197 | fault_reason, reason); |
| 1198 | else |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1199 | pr_err("DMAR:[%s] Request device [%02x:%02x.%d] " |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1200 | "fault addr %llx \n" |
| 1201 | "DMAR:[fault reason %02d] %s\n", |
| 1202 | (type ? "DMA Read" : "DMA Write"), |
| 1203 | (source_id >> 8), PCI_SLOT(source_id & 0xFF), |
| 1204 | PCI_FUNC(source_id & 0xFF), addr, fault_reason, reason); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | #define PRIMARY_FAULT_REG_LEN (16) |
Suresh Siddha | 1531a6a | 2009-03-16 17:04:57 -0700 | [diff] [blame] | 1209 | irqreturn_t dmar_fault(int irq, void *dev_id) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1210 | { |
| 1211 | struct intel_iommu *iommu = dev_id; |
| 1212 | int reg, fault_index; |
| 1213 | u32 fault_status; |
| 1214 | unsigned long flag; |
| 1215 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1216 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1217 | fault_status = readl(iommu->reg + DMAR_FSTS_REG); |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1218 | if (fault_status) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1219 | pr_err("DRHD: handling fault status reg %x\n", fault_status); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1220 | |
| 1221 | /* TBD: ignore advanced fault log currently */ |
| 1222 | if (!(fault_status & DMA_FSTS_PPF)) |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1223 | goto unlock_exit; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1224 | |
| 1225 | fault_index = dma_fsts_fault_record_index(fault_status); |
| 1226 | reg = cap_fault_reg_offset(iommu->cap); |
| 1227 | while (1) { |
| 1228 | u8 fault_reason; |
| 1229 | u16 source_id; |
| 1230 | u64 guest_addr; |
| 1231 | int type; |
| 1232 | u32 data; |
| 1233 | |
| 1234 | /* highest 32 bits */ |
| 1235 | data = readl(iommu->reg + reg + |
| 1236 | fault_index * PRIMARY_FAULT_REG_LEN + 12); |
| 1237 | if (!(data & DMA_FRCD_F)) |
| 1238 | break; |
| 1239 | |
| 1240 | fault_reason = dma_frcd_fault_reason(data); |
| 1241 | type = dma_frcd_type(data); |
| 1242 | |
| 1243 | data = readl(iommu->reg + reg + |
| 1244 | fault_index * PRIMARY_FAULT_REG_LEN + 8); |
| 1245 | source_id = dma_frcd_source_id(data); |
| 1246 | |
| 1247 | guest_addr = dmar_readq(iommu->reg + reg + |
| 1248 | fault_index * PRIMARY_FAULT_REG_LEN); |
| 1249 | guest_addr = dma_frcd_page_addr(guest_addr); |
| 1250 | /* clear the fault */ |
| 1251 | writel(DMA_FRCD_F, iommu->reg + reg + |
| 1252 | fault_index * PRIMARY_FAULT_REG_LEN + 12); |
| 1253 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1254 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1255 | |
| 1256 | dmar_fault_do_one(iommu, type, fault_reason, |
| 1257 | source_id, guest_addr); |
| 1258 | |
| 1259 | fault_index++; |
Troy Heber | 8211a7b | 2009-08-19 15:26:11 -0600 | [diff] [blame] | 1260 | if (fault_index >= cap_num_fault_regs(iommu->cap)) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1261 | fault_index = 0; |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1262 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1263 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1264 | |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1265 | writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); |
| 1266 | |
| 1267 | unlock_exit: |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1268 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1269 | return IRQ_HANDLED; |
| 1270 | } |
| 1271 | |
| 1272 | int dmar_set_interrupt(struct intel_iommu *iommu) |
| 1273 | { |
| 1274 | int irq, ret; |
| 1275 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1276 | /* |
| 1277 | * Check if the fault interrupt is already initialized. |
| 1278 | */ |
| 1279 | if (iommu->irq) |
| 1280 | return 0; |
| 1281 | |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1282 | irq = create_irq(); |
| 1283 | if (!irq) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1284 | pr_err("IOMMU: no free vectors\n"); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1285 | return -EINVAL; |
| 1286 | } |
| 1287 | |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1288 | irq_set_handler_data(irq, iommu); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1289 | iommu->irq = irq; |
| 1290 | |
| 1291 | ret = arch_setup_dmar_msi(irq); |
| 1292 | if (ret) { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1293 | irq_set_handler_data(irq, NULL); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1294 | iommu->irq = 0; |
| 1295 | destroy_irq(irq); |
Chris Wright | dd72643 | 2009-05-13 15:55:52 -0700 | [diff] [blame] | 1296 | return ret; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1297 | } |
| 1298 | |
Thomas Gleixner | 477694e | 2011-07-19 16:25:42 +0200 | [diff] [blame] | 1299 | ret = request_irq(irq, dmar_fault, IRQF_NO_THREAD, iommu->name, iommu); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1300 | if (ret) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1301 | pr_err("IOMMU: can't request irq\n"); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1302 | return ret; |
| 1303 | } |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1304 | |
| 1305 | int __init enable_drhd_fault_handling(void) |
| 1306 | { |
| 1307 | struct dmar_drhd_unit *drhd; |
| 1308 | |
| 1309 | /* |
| 1310 | * Enable fault control interrupt. |
| 1311 | */ |
| 1312 | for_each_drhd_unit(drhd) { |
| 1313 | int ret; |
| 1314 | struct intel_iommu *iommu = drhd->iommu; |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1315 | u32 fault_status; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1316 | ret = dmar_set_interrupt(iommu); |
| 1317 | |
| 1318 | if (ret) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 1319 | pr_err("DRHD %Lx: failed to enable fault, interrupt, ret %d\n", |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1320 | (unsigned long long)drhd->reg_base_addr, ret); |
| 1321 | return -1; |
| 1322 | } |
Suresh Siddha | 7f99d94 | 2010-11-30 22:22:29 -0800 | [diff] [blame] | 1323 | |
| 1324 | /* |
| 1325 | * Clear any previous faults. |
| 1326 | */ |
| 1327 | dmar_fault(iommu->irq, iommu); |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1328 | fault_status = readl(iommu->reg + DMAR_FSTS_REG); |
| 1329 | writel(fault_status, iommu->reg + DMAR_FSTS_REG); |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | return 0; |
| 1333 | } |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1334 | |
| 1335 | /* |
| 1336 | * Re-enable Queued Invalidation interface. |
| 1337 | */ |
| 1338 | int dmar_reenable_qi(struct intel_iommu *iommu) |
| 1339 | { |
| 1340 | if (!ecap_qis(iommu->ecap)) |
| 1341 | return -ENOENT; |
| 1342 | |
| 1343 | if (!iommu->qi) |
| 1344 | return -ENOENT; |
| 1345 | |
| 1346 | /* |
| 1347 | * First disable queued invalidation. |
| 1348 | */ |
| 1349 | dmar_disable_qi(iommu); |
| 1350 | /* |
| 1351 | * Then enable queued invalidation again. Since there is no pending |
| 1352 | * invalidation requests now, it's safe to re-enable queued |
| 1353 | * invalidation. |
| 1354 | */ |
| 1355 | __dmar_enable_qi(iommu); |
| 1356 | |
| 1357 | return 0; |
| 1358 | } |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1359 | |
| 1360 | /* |
| 1361 | * Check interrupt remapping support in DMAR table description. |
| 1362 | */ |
Luck, Tony | 0b8973a | 2009-12-16 22:59:29 +0000 | [diff] [blame] | 1363 | int __init dmar_ir_support(void) |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1364 | { |
| 1365 | struct acpi_table_dmar *dmar; |
| 1366 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
Arnaud Patard | 4f506e0 | 2010-03-25 18:02:58 +0000 | [diff] [blame] | 1367 | if (!dmar) |
| 1368 | return 0; |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1369 | return dmar->flags & 0x1; |
| 1370 | } |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame^] | 1371 | |
Konrad Rzeszutek Wilk | 4db77ff | 2010-08-26 13:58:04 -0400 | [diff] [blame] | 1372 | IOMMU_INIT_POST(detect_intel_iommu); |