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 | |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 46 | /* |
| 47 | * Assumptions: |
| 48 | * 1) The hotplug framework guarentees that DMAR unit will be hot-added |
| 49 | * before IO devices managed by that unit. |
| 50 | * 2) The hotplug framework guarantees that DMAR unit will be hot-removed |
| 51 | * after IO devices managed by that unit. |
| 52 | * 3) Hotplug events are rare. |
| 53 | * |
| 54 | * Locking rules for DMA and interrupt remapping related global data structures: |
| 55 | * 1) Use dmar_global_lock in process context |
| 56 | * 2) Use RCU in interrupt context |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 57 | */ |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 58 | DECLARE_RWSEM(dmar_global_lock); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 59 | LIST_HEAD(dmar_drhd_units); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 60 | |
Suresh Siddha | 41750d3 | 2011-08-23 17:05:18 -0700 | [diff] [blame] | 61 | struct acpi_table_header * __initdata dmar_tbl; |
Yinghai Lu | 8e1568f | 2009-02-11 01:06:59 -0800 | [diff] [blame] | 62 | static acpi_size dmar_tbl_size; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 63 | |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame] | 64 | static int alloc_iommu(struct dmar_drhd_unit *drhd); |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 65 | static void free_iommu(struct intel_iommu *iommu); |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame] | 66 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 67 | static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd) |
| 68 | { |
| 69 | /* |
| 70 | * add INCLUDE_ALL at the tail, so scan the list will find it at |
| 71 | * the very end. |
| 72 | */ |
| 73 | if (drhd->include_all) |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 74 | list_add_tail_rcu(&drhd->list, &dmar_drhd_units); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 75 | else |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 76 | list_add_rcu(&drhd->list, &dmar_drhd_units); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 77 | } |
| 78 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 79 | static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 80 | struct pci_dev __rcu **dev, u16 segment) |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 81 | { |
| 82 | struct pci_bus *bus; |
| 83 | struct pci_dev *pdev = NULL; |
| 84 | struct acpi_dmar_pci_path *path; |
| 85 | int count; |
| 86 | |
| 87 | bus = pci_find_bus(segment, scope->bus); |
| 88 | path = (struct acpi_dmar_pci_path *)(scope + 1); |
| 89 | count = (scope->length - sizeof(struct acpi_dmar_device_scope)) |
| 90 | / sizeof(struct acpi_dmar_pci_path); |
| 91 | |
| 92 | while (count) { |
| 93 | if (pdev) |
| 94 | pci_dev_put(pdev); |
| 95 | /* |
| 96 | * Some BIOSes list non-exist devices in DMAR table, just |
| 97 | * ignore it |
| 98 | */ |
| 99 | if (!bus) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 100 | pr_warn("Device scope bus [%d] not found\n", scope->bus); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 101 | break; |
| 102 | } |
Lv Zheng | fa5f508 | 2013-10-31 09:30:22 +0800 | [diff] [blame] | 103 | pdev = pci_get_slot(bus, PCI_DEVFN(path->device, path->function)); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 104 | if (!pdev) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 105 | /* warning will be printed below */ |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 106 | break; |
| 107 | } |
| 108 | path ++; |
| 109 | count --; |
| 110 | bus = pdev->subordinate; |
| 111 | } |
| 112 | if (!pdev) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 113 | pr_warn("Device scope device [%04x:%02x:%02x.%02x] not found\n", |
Lv Zheng | fa5f508 | 2013-10-31 09:30:22 +0800 | [diff] [blame] | 114 | segment, scope->bus, path->device, path->function); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && \ |
| 118 | pdev->subordinate) || (scope->entry_type == \ |
| 119 | ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) { |
| 120 | pci_dev_put(pdev); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 121 | pr_warn("Device scope type does not match for %s\n", |
| 122 | pci_name(pdev)); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 123 | return -EINVAL; |
| 124 | } |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 125 | |
| 126 | rcu_assign_pointer(*dev, pdev); |
| 127 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 128 | return 0; |
| 129 | } |
| 130 | |
Jiang Liu | bb3a6b7 | 2014-02-19 14:07:24 +0800 | [diff] [blame] | 131 | void *dmar_alloc_dev_scope(void *start, void *end, int *cnt) |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 132 | { |
| 133 | struct acpi_dmar_device_scope *scope; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 134 | |
| 135 | *cnt = 0; |
| 136 | while (start < end) { |
| 137 | scope = start; |
| 138 | if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || |
| 139 | scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) |
| 140 | (*cnt)++; |
Linn Crosetto | ae3e7f3 | 2013-04-23 12:26:45 -0600 | [diff] [blame] | 141 | else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC && |
| 142 | scope->entry_type != ACPI_DMAR_SCOPE_TYPE_HPET) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 143 | pr_warn("Unsupported device scope\n"); |
Yinghai Lu | 5715f0f | 2010-04-08 19:58:22 +0100 | [diff] [blame] | 144 | } |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 145 | start += scope->length; |
| 146 | } |
| 147 | if (*cnt == 0) |
Jiang Liu | bb3a6b7 | 2014-02-19 14:07:24 +0800 | [diff] [blame] | 148 | return NULL; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 149 | |
Jiang Liu | bb3a6b7 | 2014-02-19 14:07:24 +0800 | [diff] [blame] | 150 | return kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL); |
| 151 | } |
| 152 | |
| 153 | int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 154 | struct pci_dev __rcu ***devices, u16 segment) |
Jiang Liu | bb3a6b7 | 2014-02-19 14:07:24 +0800 | [diff] [blame] | 155 | { |
| 156 | struct acpi_dmar_device_scope *scope; |
| 157 | int index, ret; |
| 158 | |
| 159 | *devices = dmar_alloc_dev_scope(start, end, cnt); |
| 160 | if (*cnt == 0) |
| 161 | return 0; |
| 162 | else if (!*devices) |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 163 | return -ENOMEM; |
| 164 | |
Jiang Liu | bb3a6b7 | 2014-02-19 14:07:24 +0800 | [diff] [blame] | 165 | for (index = 0; start < end; start += scope->length) { |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 166 | scope = start; |
| 167 | if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || |
| 168 | scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) { |
| 169 | ret = dmar_parse_one_dev_scope(scope, |
| 170 | &(*devices)[index], segment); |
| 171 | if (ret) { |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 172 | dmar_free_dev_scope(devices, cnt); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 173 | return ret; |
| 174 | } |
| 175 | index ++; |
| 176 | } |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 182 | void dmar_free_dev_scope(struct pci_dev __rcu ***devices, int *cnt) |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 183 | { |
Jiang Liu | b683b23 | 2014-02-19 14:07:32 +0800 | [diff] [blame] | 184 | int i; |
| 185 | struct pci_dev *tmp_dev; |
| 186 | |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 187 | if (*devices && *cnt) { |
Jiang Liu | b683b23 | 2014-02-19 14:07:32 +0800 | [diff] [blame] | 188 | for_each_active_dev_scope(*devices, *cnt, i, tmp_dev) |
| 189 | pci_dev_put(tmp_dev); |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 190 | kfree(*devices); |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 191 | } |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 192 | |
| 193 | *devices = NULL; |
| 194 | *cnt = 0; |
Jiang Liu | ada4d4b | 2014-01-06 14:18:09 +0800 | [diff] [blame] | 195 | } |
| 196 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 197 | /** |
| 198 | * dmar_parse_one_drhd - parses exactly one DMA remapping hardware definition |
| 199 | * structure which uniquely represent one DMA remapping hardware unit |
| 200 | * present in the platform |
| 201 | */ |
| 202 | static int __init |
| 203 | dmar_parse_one_drhd(struct acpi_dmar_header *header) |
| 204 | { |
| 205 | struct acpi_dmar_hardware_unit *drhd; |
| 206 | struct dmar_drhd_unit *dmaru; |
| 207 | int ret = 0; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 208 | |
David Woodhouse | e523b38 | 2009-04-10 22:27:48 -0700 | [diff] [blame] | 209 | drhd = (struct acpi_dmar_hardware_unit *)header; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 210 | dmaru = kzalloc(sizeof(*dmaru), GFP_KERNEL); |
| 211 | if (!dmaru) |
| 212 | return -ENOMEM; |
| 213 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 214 | dmaru->hdr = header; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 215 | dmaru->reg_base_addr = drhd->address; |
David Woodhouse | 276dbf99 | 2009-04-04 01:45:37 +0100 | [diff] [blame] | 216 | dmaru->segment = drhd->segment; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 217 | dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */ |
| 218 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 219 | ret = alloc_iommu(dmaru); |
| 220 | if (ret) { |
| 221 | kfree(dmaru); |
| 222 | return ret; |
| 223 | } |
| 224 | dmar_register_drhd_unit(dmaru); |
| 225 | return 0; |
| 226 | } |
| 227 | |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 228 | static void dmar_free_drhd(struct dmar_drhd_unit *dmaru) |
| 229 | { |
| 230 | if (dmaru->devices && dmaru->devices_cnt) |
| 231 | dmar_free_dev_scope(&dmaru->devices, &dmaru->devices_cnt); |
| 232 | if (dmaru->iommu) |
| 233 | free_iommu(dmaru->iommu); |
| 234 | kfree(dmaru); |
| 235 | } |
| 236 | |
David Woodhouse | f82851a | 2008-10-18 15:43:14 +0100 | [diff] [blame] | 237 | static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru) |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 238 | { |
| 239 | struct acpi_dmar_hardware_unit *drhd; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 240 | |
| 241 | drhd = (struct acpi_dmar_hardware_unit *) dmaru->hdr; |
| 242 | |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 243 | if (dmaru->include_all) |
| 244 | return 0; |
| 245 | |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 246 | return dmar_parse_dev_scope((void *)(drhd + 1), |
| 247 | ((void *)drhd) + drhd->header.length, |
| 248 | &dmaru->devices_cnt, &dmaru->devices, |
| 249 | drhd->segment); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 250 | } |
| 251 | |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 252 | #ifdef CONFIG_ACPI_NUMA |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 253 | static int __init |
| 254 | dmar_parse_one_rhsa(struct acpi_dmar_header *header) |
| 255 | { |
| 256 | struct acpi_dmar_rhsa *rhsa; |
| 257 | struct dmar_drhd_unit *drhd; |
| 258 | |
| 259 | rhsa = (struct acpi_dmar_rhsa *)header; |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 260 | for_each_drhd_unit(drhd) { |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 261 | if (drhd->reg_base_addr == rhsa->base_address) { |
| 262 | int node = acpi_map_pxm_to_node(rhsa->proximity_domain); |
| 263 | |
| 264 | if (!node_online(node)) |
| 265 | node = -1; |
| 266 | drhd->iommu->node = node; |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 267 | return 0; |
| 268 | } |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 269 | } |
Ben Hutchings | fd0c889 | 2010-04-03 19:38:43 +0100 | [diff] [blame] | 270 | WARN_TAINT( |
| 271 | 1, TAINT_FIRMWARE_WORKAROUND, |
| 272 | "Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n" |
| 273 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", |
| 274 | drhd->reg_base_addr, |
| 275 | dmi_get_system_info(DMI_BIOS_VENDOR), |
| 276 | dmi_get_system_info(DMI_BIOS_VERSION), |
| 277 | dmi_get_system_info(DMI_PRODUCT_VERSION)); |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 278 | |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 279 | return 0; |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 280 | } |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 281 | #endif |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 282 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 283 | static void __init |
| 284 | dmar_table_print_dmar_entry(struct acpi_dmar_header *header) |
| 285 | { |
| 286 | struct acpi_dmar_hardware_unit *drhd; |
| 287 | struct acpi_dmar_reserved_memory *rmrr; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 288 | struct acpi_dmar_atsr *atsr; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 289 | struct acpi_dmar_rhsa *rhsa; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 290 | |
| 291 | switch (header->type) { |
| 292 | case ACPI_DMAR_TYPE_HARDWARE_UNIT: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 293 | drhd = container_of(header, struct acpi_dmar_hardware_unit, |
| 294 | header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 295 | pr_info("DRHD base: %#016Lx flags: %#x\n", |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 296 | (unsigned long long)drhd->address, drhd->flags); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 297 | break; |
| 298 | case ACPI_DMAR_TYPE_RESERVED_MEMORY: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 299 | rmrr = container_of(header, struct acpi_dmar_reserved_memory, |
| 300 | header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 301 | pr_info("RMRR base: %#016Lx end: %#016Lx\n", |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 302 | (unsigned long long)rmrr->base_address, |
| 303 | (unsigned long long)rmrr->end_address); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 304 | break; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 305 | case ACPI_DMAR_TYPE_ATSR: |
| 306 | atsr = container_of(header, struct acpi_dmar_atsr, header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 307 | pr_info("ATSR flags: %#x\n", atsr->flags); |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 308 | break; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 309 | case ACPI_DMAR_HARDWARE_AFFINITY: |
| 310 | rhsa = container_of(header, struct acpi_dmar_rhsa, header); |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 311 | pr_info("RHSA base: %#016Lx proximity domain: %#x\n", |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 312 | (unsigned long long)rhsa->base_address, |
| 313 | rhsa->proximity_domain); |
| 314 | break; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 318 | /** |
| 319 | * dmar_table_detect - checks to see if the platform supports DMAR devices |
| 320 | */ |
| 321 | static int __init dmar_table_detect(void) |
| 322 | { |
| 323 | acpi_status status = AE_OK; |
| 324 | |
| 325 | /* if we could find DMAR table, then there are DMAR devices */ |
Yinghai Lu | 8e1568f | 2009-02-11 01:06:59 -0800 | [diff] [blame] | 326 | status = acpi_get_table_with_size(ACPI_SIG_DMAR, 0, |
| 327 | (struct acpi_table_header **)&dmar_tbl, |
| 328 | &dmar_tbl_size); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 329 | |
| 330 | if (ACPI_SUCCESS(status) && !dmar_tbl) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 331 | pr_warn("Unable to map DMAR\n"); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 332 | status = AE_NOT_FOUND; |
| 333 | } |
| 334 | |
| 335 | return (ACPI_SUCCESS(status) ? 1 : 0); |
| 336 | } |
Suresh Siddha | aaa9d1d | 2008-07-10 11:16:38 -0700 | [diff] [blame] | 337 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 338 | /** |
| 339 | * parse_dmar_table - parses the DMA reporting table |
| 340 | */ |
| 341 | static int __init |
| 342 | parse_dmar_table(void) |
| 343 | { |
| 344 | struct acpi_table_dmar *dmar; |
| 345 | struct acpi_dmar_header *entry_header; |
| 346 | int ret = 0; |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 347 | int drhd_count = 0; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 348 | |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 349 | /* |
| 350 | * Do it again, earlier dmar_tbl mapping could be mapped with |
| 351 | * fixed map. |
| 352 | */ |
| 353 | dmar_table_detect(); |
| 354 | |
Joseph Cihula | a59b50e | 2009-06-30 19:31:10 -0700 | [diff] [blame] | 355 | /* |
| 356 | * ACPI tables may not be DMA protected by tboot, so use DMAR copy |
| 357 | * SINIT saved in SinitMleData in TXT heap (which is DMA protected) |
| 358 | */ |
| 359 | dmar_tbl = tboot_get_dmar_table(dmar_tbl); |
| 360 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 361 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
| 362 | if (!dmar) |
| 363 | return -ENODEV; |
| 364 | |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 365 | if (dmar->width < PAGE_SHIFT - 1) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 366 | pr_warn("Invalid DMAR haw\n"); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 367 | return -EINVAL; |
| 368 | } |
| 369 | |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 370 | pr_info("Host address width %d\n", dmar->width + 1); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 371 | |
| 372 | entry_header = (struct acpi_dmar_header *)(dmar + 1); |
| 373 | while (((unsigned long)entry_header) < |
| 374 | (((unsigned long)dmar) + dmar_tbl->length)) { |
Tony Battersby | 084eb96 | 2009-02-11 13:24:19 -0800 | [diff] [blame] | 375 | /* Avoid looping forever on bad ACPI tables */ |
| 376 | if (entry_header->length == 0) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 377 | pr_warn("Invalid 0-length structure\n"); |
Tony Battersby | 084eb96 | 2009-02-11 13:24:19 -0800 | [diff] [blame] | 378 | ret = -EINVAL; |
| 379 | break; |
| 380 | } |
| 381 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 382 | dmar_table_print_dmar_entry(entry_header); |
| 383 | |
| 384 | switch (entry_header->type) { |
| 385 | case ACPI_DMAR_TYPE_HARDWARE_UNIT: |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 386 | drhd_count++; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 387 | ret = dmar_parse_one_drhd(entry_header); |
| 388 | break; |
| 389 | case ACPI_DMAR_TYPE_RESERVED_MEMORY: |
| 390 | ret = dmar_parse_one_rmrr(entry_header); |
| 391 | break; |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 392 | case ACPI_DMAR_TYPE_ATSR: |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 393 | ret = dmar_parse_one_atsr(entry_header); |
Yu Zhao | aa5d2b5 | 2009-05-18 13:51:34 +0800 | [diff] [blame] | 394 | break; |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 395 | case ACPI_DMAR_HARDWARE_AFFINITY: |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 396 | #ifdef CONFIG_ACPI_NUMA |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 397 | ret = dmar_parse_one_rhsa(entry_header); |
David Woodhouse | aa69707 | 2009-10-07 12:18:00 +0100 | [diff] [blame] | 398 | #endif |
Roland Dreier | 17b6097 | 2009-09-24 12:14:00 -0700 | [diff] [blame] | 399 | break; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 400 | default: |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 401 | pr_warn("Unknown DMAR structure type %d\n", |
Roland Dreier | 4de75cf | 2009-09-24 01:01:29 +0100 | [diff] [blame] | 402 | entry_header->type); |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 403 | ret = 0; /* for forward compatibility */ |
| 404 | break; |
| 405 | } |
| 406 | if (ret) |
| 407 | break; |
| 408 | |
| 409 | entry_header = ((void *)entry_header + entry_header->length); |
| 410 | } |
Li, Zhen-Hua | 7cef334 | 2013-05-20 15:57:32 +0800 | [diff] [blame] | 411 | if (drhd_count == 0) |
| 412 | 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] | 413 | return ret; |
| 414 | } |
| 415 | |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 416 | static int dmar_pci_device_match(struct pci_dev __rcu *devices[], int cnt, |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 417 | struct pci_dev *dev) |
| 418 | { |
| 419 | int index; |
Jiang Liu | b683b23 | 2014-02-19 14:07:32 +0800 | [diff] [blame] | 420 | struct pci_dev *tmp; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 421 | |
| 422 | while (dev) { |
Jiang Liu | b683b23 | 2014-02-19 14:07:32 +0800 | [diff] [blame] | 423 | for_each_active_dev_scope(devices, cnt, index, tmp) |
| 424 | if (dev == tmp) |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 425 | return 1; |
| 426 | |
| 427 | /* Check our parent */ |
| 428 | dev = dev->bus->self; |
| 429 | } |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | struct dmar_drhd_unit * |
| 435 | dmar_find_matched_drhd_unit(struct pci_dev *dev) |
| 436 | { |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 437 | struct dmar_drhd_unit *dmaru; |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 438 | struct acpi_dmar_hardware_unit *drhd; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 439 | |
Yinghai | dda5654 | 2010-04-09 01:07:55 +0100 | [diff] [blame] | 440 | dev = pci_physfn(dev); |
| 441 | |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 442 | rcu_read_lock(); |
Yijing Wang | 8b161f0 | 2013-10-31 17:25:16 +0800 | [diff] [blame] | 443 | for_each_drhd_unit(dmaru) { |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 444 | drhd = container_of(dmaru->hdr, |
| 445 | struct acpi_dmar_hardware_unit, |
| 446 | header); |
| 447 | |
| 448 | if (dmaru->include_all && |
| 449 | drhd->segment == pci_domain_nr(dev->bus)) |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 450 | goto out; |
Yu Zhao | 2e824f7 | 2008-12-22 16:54:58 +0800 | [diff] [blame] | 451 | |
| 452 | if (dmar_pci_device_match(dmaru->devices, |
| 453 | dmaru->devices_cnt, dev)) |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 454 | goto out; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 455 | } |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 456 | dmaru = NULL; |
| 457 | out: |
| 458 | rcu_read_unlock(); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 459 | |
Jiang Liu | 0e242612 | 2014-02-19 14:07:34 +0800 | [diff] [blame^] | 460 | return dmaru; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 463 | int __init dmar_dev_scope_init(void) |
| 464 | { |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 465 | static int dmar_dev_scope_initialized; |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 466 | struct dmar_drhd_unit *drhd; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 467 | int ret = -ENODEV; |
| 468 | |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 469 | if (dmar_dev_scope_initialized) |
| 470 | return dmar_dev_scope_initialized; |
| 471 | |
Suresh Siddha | 318fe7d | 2011-08-23 17:05:20 -0700 | [diff] [blame] | 472 | if (list_empty(&dmar_drhd_units)) |
| 473 | goto fail; |
| 474 | |
Jiang Liu | b683b23 | 2014-02-19 14:07:32 +0800 | [diff] [blame] | 475 | for_each_drhd_unit(drhd) { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 476 | ret = dmar_parse_dev(drhd); |
| 477 | if (ret) |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 478 | goto fail; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 479 | } |
| 480 | |
Suresh Siddha | 318fe7d | 2011-08-23 17:05:20 -0700 | [diff] [blame] | 481 | ret = dmar_parse_rmrr_atsr_dev(); |
| 482 | if (ret) |
| 483 | goto fail; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 484 | |
Suresh Siddha | c2c7286 | 2011-08-23 17:05:19 -0700 | [diff] [blame] | 485 | dmar_dev_scope_initialized = 1; |
| 486 | return 0; |
| 487 | |
| 488 | fail: |
| 489 | dmar_dev_scope_initialized = ret; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 490 | return ret; |
| 491 | } |
| 492 | |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 493 | |
| 494 | int __init dmar_table_init(void) |
| 495 | { |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 496 | static int dmar_table_initialized; |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 497 | int ret; |
| 498 | |
Jiang Liu | cc05301 | 2014-01-06 14:18:24 +0800 | [diff] [blame] | 499 | if (dmar_table_initialized == 0) { |
| 500 | ret = parse_dmar_table(); |
| 501 | if (ret < 0) { |
| 502 | if (ret != -ENODEV) |
| 503 | pr_info("parse DMAR table failure.\n"); |
| 504 | } else if (list_empty(&dmar_drhd_units)) { |
| 505 | pr_info("No DMAR devices found\n"); |
| 506 | ret = -ENODEV; |
| 507 | } |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 508 | |
Jiang Liu | cc05301 | 2014-01-06 14:18:24 +0800 | [diff] [blame] | 509 | if (ret < 0) |
| 510 | dmar_table_initialized = ret; |
| 511 | else |
| 512 | dmar_table_initialized = 1; |
Fenghua Yu | 093f87d | 2007-11-21 15:07:14 -0800 | [diff] [blame] | 513 | } |
| 514 | |
Jiang Liu | cc05301 | 2014-01-06 14:18:24 +0800 | [diff] [blame] | 515 | return dmar_table_initialized < 0 ? dmar_table_initialized : 0; |
Keshavamurthy, Anil S | 10e5247 | 2007-10-21 16:41:41 -0700 | [diff] [blame] | 516 | } |
| 517 | |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 518 | static void warn_invalid_dmar(u64 addr, const char *message) |
| 519 | { |
Ben Hutchings | fd0c889 | 2010-04-03 19:38:43 +0100 | [diff] [blame] | 520 | WARN_TAINT_ONCE( |
| 521 | 1, TAINT_FIRMWARE_WORKAROUND, |
| 522 | "Your BIOS is broken; DMAR reported at address %llx%s!\n" |
| 523 | "BIOS vendor: %s; Ver: %s; Product Version: %s\n", |
| 524 | addr, message, |
| 525 | dmi_get_system_info(DMI_BIOS_VENDOR), |
| 526 | dmi_get_system_info(DMI_BIOS_VERSION), |
| 527 | dmi_get_system_info(DMI_PRODUCT_VERSION)); |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 528 | } |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 529 | |
Rashika Kheria | 21004dc | 2013-12-18 12:01:46 +0530 | [diff] [blame] | 530 | static int __init check_zero_address(void) |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 531 | { |
| 532 | struct acpi_table_dmar *dmar; |
| 533 | struct acpi_dmar_header *entry_header; |
| 534 | struct acpi_dmar_hardware_unit *drhd; |
| 535 | |
| 536 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
| 537 | entry_header = (struct acpi_dmar_header *)(dmar + 1); |
| 538 | |
| 539 | while (((unsigned long)entry_header) < |
| 540 | (((unsigned long)dmar) + dmar_tbl->length)) { |
| 541 | /* Avoid looping forever on bad ACPI tables */ |
| 542 | if (entry_header->length == 0) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 543 | pr_warn("Invalid 0-length structure\n"); |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | if (entry_header->type == ACPI_DMAR_TYPE_HARDWARE_UNIT) { |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 548 | void __iomem *addr; |
| 549 | u64 cap, ecap; |
| 550 | |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 551 | drhd = (void *)entry_header; |
| 552 | if (!drhd->address) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 553 | warn_invalid_dmar(0, ""); |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 554 | goto failed; |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 555 | } |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 556 | |
| 557 | addr = early_ioremap(drhd->address, VTD_PAGE_SIZE); |
| 558 | if (!addr ) { |
| 559 | printk("IOMMU: can't validate: %llx\n", drhd->address); |
| 560 | goto failed; |
| 561 | } |
| 562 | cap = dmar_readq(addr + DMAR_CAP_REG); |
| 563 | ecap = dmar_readq(addr + DMAR_ECAP_REG); |
| 564 | early_iounmap(addr, VTD_PAGE_SIZE); |
| 565 | if (cap == (uint64_t)-1 && ecap == (uint64_t)-1) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 566 | warn_invalid_dmar(drhd->address, |
| 567 | " returns all ones"); |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 568 | goto failed; |
| 569 | } |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | entry_header = ((void *)entry_header + entry_header->length); |
| 573 | } |
| 574 | return 1; |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 575 | |
| 576 | failed: |
Chris Wright | 2c99220 | 2009-12-02 09:17:13 +0000 | [diff] [blame] | 577 | return 0; |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 580 | int __init detect_intel_iommu(void) |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 581 | { |
| 582 | int ret; |
| 583 | |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 584 | down_write(&dmar_global_lock); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 585 | ret = dmar_table_detect(); |
David Woodhouse | 86cf898 | 2009-11-09 22:15:15 +0000 | [diff] [blame] | 586 | if (ret) |
| 587 | ret = check_zero_address(); |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 588 | { |
Linus Torvalds | 11bd04f | 2009-12-11 12:18:16 -0800 | [diff] [blame] | 589 | if (ret && !no_iommu && !iommu_detected && !dmar_disabled) { |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 590 | iommu_detected = 1; |
Chris Wright | 5d990b6 | 2009-12-04 12:15:21 -0800 | [diff] [blame] | 591 | /* Make sure ACS will be enabled */ |
| 592 | pci_request_acs(); |
| 593 | } |
Suresh Siddha | f5d1b97 | 2011-08-23 17:05:22 -0700 | [diff] [blame] | 594 | |
FUJITA Tomonori | 9d5ce73 | 2009-11-10 19:46:16 +0900 | [diff] [blame] | 595 | #ifdef CONFIG_X86 |
| 596 | if (ret) |
| 597 | x86_init.iommu.iommu_init = intel_iommu_init; |
| 598 | #endif |
Youquan Song | cacd421 | 2008-10-16 16:31:57 -0700 | [diff] [blame] | 599 | } |
Jiang Liu | b707cb0 | 2014-01-06 14:18:26 +0800 | [diff] [blame] | 600 | early_acpi_os_unmap_memory((void __iomem *)dmar_tbl, dmar_tbl_size); |
Yinghai Lu | f6dd5c3 | 2008-09-03 16:58:32 -0700 | [diff] [blame] | 601 | dmar_tbl = NULL; |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 602 | up_write(&dmar_global_lock); |
Konrad Rzeszutek Wilk | 480125b | 2010-08-26 13:57:57 -0400 | [diff] [blame] | 603 | |
Konrad Rzeszutek Wilk | 4db77ff | 2010-08-26 13:58:04 -0400 | [diff] [blame] | 604 | return ret ? 1 : -ENODEV; |
Suresh Siddha | 2ae2101 | 2008-07-10 11:16:43 -0700 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 608 | static void unmap_iommu(struct intel_iommu *iommu) |
| 609 | { |
| 610 | iounmap(iommu->reg); |
| 611 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * map_iommu: map the iommu's registers |
| 616 | * @iommu: the iommu to map |
| 617 | * @phys_addr: the physical address of the base resgister |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 618 | * |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 619 | * Memory map the iommu's registers. Start w/ a single page, and |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 620 | * possibly expand if that turns out to be insufficent. |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 621 | */ |
| 622 | static int map_iommu(struct intel_iommu *iommu, u64 phys_addr) |
| 623 | { |
| 624 | int map_size, err=0; |
| 625 | |
| 626 | iommu->reg_phys = phys_addr; |
| 627 | iommu->reg_size = VTD_PAGE_SIZE; |
| 628 | |
| 629 | if (!request_mem_region(iommu->reg_phys, iommu->reg_size, iommu->name)) { |
| 630 | pr_err("IOMMU: can't reserve memory\n"); |
| 631 | err = -EBUSY; |
| 632 | goto out; |
| 633 | } |
| 634 | |
| 635 | iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size); |
| 636 | if (!iommu->reg) { |
| 637 | pr_err("IOMMU: can't map the region\n"); |
| 638 | err = -ENOMEM; |
| 639 | goto release; |
| 640 | } |
| 641 | |
| 642 | iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG); |
| 643 | iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG); |
| 644 | |
| 645 | if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) { |
| 646 | err = -EINVAL; |
| 647 | warn_invalid_dmar(phys_addr, " returns all ones"); |
| 648 | goto unmap; |
| 649 | } |
| 650 | |
| 651 | /* the registers might be more than one page */ |
| 652 | map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap), |
| 653 | cap_max_fault_reg_offset(iommu->cap)); |
| 654 | map_size = VTD_PAGE_ALIGN(map_size); |
| 655 | if (map_size > iommu->reg_size) { |
| 656 | iounmap(iommu->reg); |
| 657 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 658 | iommu->reg_size = map_size; |
| 659 | if (!request_mem_region(iommu->reg_phys, iommu->reg_size, |
| 660 | iommu->name)) { |
| 661 | pr_err("IOMMU: can't reserve memory\n"); |
| 662 | err = -EBUSY; |
| 663 | goto out; |
| 664 | } |
| 665 | iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size); |
| 666 | if (!iommu->reg) { |
| 667 | pr_err("IOMMU: can't map the region\n"); |
| 668 | err = -ENOMEM; |
| 669 | goto release; |
| 670 | } |
| 671 | } |
| 672 | err = 0; |
| 673 | goto out; |
| 674 | |
| 675 | unmap: |
| 676 | iounmap(iommu->reg); |
| 677 | release: |
| 678 | release_mem_region(iommu->reg_phys, iommu->reg_size); |
| 679 | out: |
| 680 | return err; |
| 681 | } |
| 682 | |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame] | 683 | static int alloc_iommu(struct dmar_drhd_unit *drhd) |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 684 | { |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 685 | struct intel_iommu *iommu; |
Takao Indoh | 3a93c84 | 2013-04-23 17:35:03 +0900 | [diff] [blame] | 686 | u32 ver, sts; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 687 | static int iommu_allocated = 0; |
Joerg Roedel | 43f7392 | 2009-01-03 23:56:27 +0100 | [diff] [blame] | 688 | int agaw = 0; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 689 | int msagaw = 0; |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 690 | int err; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 691 | |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 692 | if (!drhd->reg_base_addr) { |
Ben Hutchings | 3a8663e | 2010-04-03 19:37:23 +0100 | [diff] [blame] | 693 | warn_invalid_dmar(0, ""); |
David Woodhouse | 6ecbf01 | 2009-12-02 09:20:27 +0000 | [diff] [blame] | 694 | return -EINVAL; |
| 695 | } |
| 696 | |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 697 | iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); |
| 698 | if (!iommu) |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 699 | return -ENOMEM; |
Suresh Siddha | c42d9f3 | 2008-07-10 11:16:36 -0700 | [diff] [blame] | 700 | |
| 701 | iommu->seq_id = iommu_allocated++; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 702 | sprintf (iommu->name, "dmar%d", iommu->seq_id); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 703 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 704 | err = map_iommu(iommu, drhd->reg_base_addr); |
| 705 | if (err) { |
| 706 | pr_err("IOMMU: failed to map %s\n", iommu->name); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 707 | goto error; |
| 708 | } |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 709 | |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 710 | err = -EINVAL; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 711 | agaw = iommu_calculate_agaw(iommu); |
| 712 | if (agaw < 0) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 713 | pr_err("Cannot get a valid agaw for iommu (seq_id = %d)\n", |
| 714 | iommu->seq_id); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 715 | goto err_unmap; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 716 | } |
| 717 | msagaw = iommu_calculate_max_sagaw(iommu); |
| 718 | if (msagaw < 0) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 719 | 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] | 720 | iommu->seq_id); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 721 | goto err_unmap; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 722 | } |
| 723 | iommu->agaw = agaw; |
Fenghua Yu | 4ed0d3e | 2009-04-24 17:30:20 -0700 | [diff] [blame] | 724 | iommu->msagaw = msagaw; |
Weidong Han | 1b57368 | 2008-12-08 15:34:06 +0800 | [diff] [blame] | 725 | |
Suresh Siddha | ee34b32 | 2009-10-02 11:01:21 -0700 | [diff] [blame] | 726 | iommu->node = -1; |
| 727 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 728 | ver = readl(iommu->reg + DMAR_VER_REG); |
Yinghai Lu | 680a752 | 2010-04-08 19:58:23 +0100 | [diff] [blame] | 729 | pr_info("IOMMU %d: reg_base_addr %llx ver %d:%d cap %llx ecap %llx\n", |
| 730 | iommu->seq_id, |
Fenghua Yu | 5b6985c | 2008-10-16 18:02:32 -0700 | [diff] [blame] | 731 | (unsigned long long)drhd->reg_base_addr, |
| 732 | DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver), |
| 733 | (unsigned long long)iommu->cap, |
| 734 | (unsigned long long)iommu->ecap); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 735 | |
Takao Indoh | 3a93c84 | 2013-04-23 17:35:03 +0900 | [diff] [blame] | 736 | /* Reflect status in gcmd */ |
| 737 | sts = readl(iommu->reg + DMAR_GSTS_REG); |
| 738 | if (sts & DMA_GSTS_IRES) |
| 739 | iommu->gcmd |= DMA_GCMD_IRE; |
| 740 | if (sts & DMA_GSTS_TES) |
| 741 | iommu->gcmd |= DMA_GCMD_TE; |
| 742 | if (sts & DMA_GSTS_QIES) |
| 743 | iommu->gcmd |= DMA_GCMD_QIE; |
| 744 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 745 | raw_spin_lock_init(&iommu->register_lock); |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 746 | |
| 747 | drhd->iommu = iommu; |
Suresh Siddha | 1886e8a | 2008-07-10 11:16:37 -0700 | [diff] [blame] | 748 | return 0; |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 749 | |
| 750 | err_unmap: |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 751 | unmap_iommu(iommu); |
David Woodhouse | 0815565 | 2009-08-04 09:17:20 +0100 | [diff] [blame] | 752 | error: |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 753 | kfree(iommu); |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 754 | return err; |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 757 | static void free_iommu(struct intel_iommu *iommu) |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 758 | { |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 759 | if (iommu->irq) { |
| 760 | free_irq(iommu->irq, iommu); |
| 761 | irq_set_handler_data(iommu->irq, NULL); |
| 762 | destroy_irq(iommu->irq); |
| 763 | } |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 764 | |
Jiang Liu | a84da70 | 2014-01-06 14:18:23 +0800 | [diff] [blame] | 765 | if (iommu->qi) { |
| 766 | free_page((unsigned long)iommu->qi->desc); |
| 767 | kfree(iommu->qi->desc_status); |
| 768 | kfree(iommu->qi); |
| 769 | } |
| 770 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 771 | if (iommu->reg) |
Donald Dutile | 6f5cf52 | 2012-06-04 17:29:02 -0400 | [diff] [blame] | 772 | unmap_iommu(iommu); |
| 773 | |
Suresh Siddha | e61d98d | 2008-07-10 11:16:35 -0700 | [diff] [blame] | 774 | kfree(iommu); |
| 775 | } |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 776 | |
| 777 | /* |
| 778 | * Reclaim all the submitted descriptors which have completed its work. |
| 779 | */ |
| 780 | static inline void reclaim_free_desc(struct q_inval *qi) |
| 781 | { |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 782 | while (qi->desc_status[qi->free_tail] == QI_DONE || |
| 783 | qi->desc_status[qi->free_tail] == QI_ABORT) { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 784 | qi->desc_status[qi->free_tail] = QI_FREE; |
| 785 | qi->free_tail = (qi->free_tail + 1) % QI_LENGTH; |
| 786 | qi->free_cnt++; |
| 787 | } |
| 788 | } |
| 789 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 790 | static int qi_check_fault(struct intel_iommu *iommu, int index) |
| 791 | { |
| 792 | u32 fault; |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 793 | int head, tail; |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 794 | struct q_inval *qi = iommu->qi; |
| 795 | int wait_index = (index + 1) % QI_LENGTH; |
| 796 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 797 | if (qi->desc_status[wait_index] == QI_ABORT) |
| 798 | return -EAGAIN; |
| 799 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 800 | fault = readl(iommu->reg + DMAR_FSTS_REG); |
| 801 | |
| 802 | /* |
| 803 | * If IQE happens, the head points to the descriptor associated |
| 804 | * with the error. No new descriptors are fetched until the IQE |
| 805 | * is cleared. |
| 806 | */ |
| 807 | if (fault & DMA_FSTS_IQE) { |
| 808 | head = readl(iommu->reg + DMAR_IQH_REG); |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 809 | if ((head >> DMAR_IQ_SHIFT) == index) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 810 | pr_err("VT-d detected invalid descriptor: " |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 811 | "low=%llx, high=%llx\n", |
| 812 | (unsigned long long)qi->desc[index].low, |
| 813 | (unsigned long long)qi->desc[index].high); |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 814 | memcpy(&qi->desc[index], &qi->desc[wait_index], |
| 815 | sizeof(struct qi_desc)); |
| 816 | __iommu_flush_cache(iommu, &qi->desc[index], |
| 817 | sizeof(struct qi_desc)); |
| 818 | writel(DMA_FSTS_IQE, iommu->reg + DMAR_FSTS_REG); |
| 819 | return -EINVAL; |
| 820 | } |
| 821 | } |
| 822 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 823 | /* |
| 824 | * If ITE happens, all pending wait_desc commands are aborted. |
| 825 | * No new descriptors are fetched until the ITE is cleared. |
| 826 | */ |
| 827 | if (fault & DMA_FSTS_ITE) { |
| 828 | head = readl(iommu->reg + DMAR_IQH_REG); |
| 829 | head = ((head >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH; |
| 830 | head |= 1; |
| 831 | tail = readl(iommu->reg + DMAR_IQT_REG); |
| 832 | tail = ((tail >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH; |
| 833 | |
| 834 | writel(DMA_FSTS_ITE, iommu->reg + DMAR_FSTS_REG); |
| 835 | |
| 836 | do { |
| 837 | if (qi->desc_status[head] == QI_IN_USE) |
| 838 | qi->desc_status[head] = QI_ABORT; |
| 839 | head = (head - 2 + QI_LENGTH) % QI_LENGTH; |
| 840 | } while (head != tail); |
| 841 | |
| 842 | if (qi->desc_status[wait_index] == QI_ABORT) |
| 843 | return -EAGAIN; |
| 844 | } |
| 845 | |
| 846 | if (fault & DMA_FSTS_ICE) |
| 847 | writel(DMA_FSTS_ICE, iommu->reg + DMAR_FSTS_REG); |
| 848 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 849 | return 0; |
| 850 | } |
| 851 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 852 | /* |
| 853 | * Submit the queued invalidation descriptor to the remapping |
| 854 | * hardware unit and wait for its completion. |
| 855 | */ |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 856 | int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu) |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 857 | { |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 858 | int rc; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 859 | struct q_inval *qi = iommu->qi; |
| 860 | struct qi_desc *hw, wait_desc; |
| 861 | int wait_index, index; |
| 862 | unsigned long flags; |
| 863 | |
| 864 | if (!qi) |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 865 | return 0; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 866 | |
| 867 | hw = qi->desc; |
| 868 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 869 | restart: |
| 870 | rc = 0; |
| 871 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 872 | raw_spin_lock_irqsave(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 873 | while (qi->free_cnt < 3) { |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 874 | raw_spin_unlock_irqrestore(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 875 | cpu_relax(); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 876 | raw_spin_lock_irqsave(&qi->q_lock, flags); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | index = qi->free_head; |
| 880 | wait_index = (index + 1) % QI_LENGTH; |
| 881 | |
| 882 | qi->desc_status[index] = qi->desc_status[wait_index] = QI_IN_USE; |
| 883 | |
| 884 | hw[index] = *desc; |
| 885 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 886 | wait_desc.low = QI_IWD_STATUS_DATA(QI_DONE) | |
| 887 | QI_IWD_STATUS_WRITE | QI_IWD_TYPE; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 888 | wait_desc.high = virt_to_phys(&qi->desc_status[wait_index]); |
| 889 | |
| 890 | hw[wait_index] = wait_desc; |
| 891 | |
| 892 | __iommu_flush_cache(iommu, &hw[index], sizeof(struct qi_desc)); |
| 893 | __iommu_flush_cache(iommu, &hw[wait_index], sizeof(struct qi_desc)); |
| 894 | |
| 895 | qi->free_head = (qi->free_head + 2) % QI_LENGTH; |
| 896 | qi->free_cnt -= 2; |
| 897 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 898 | /* |
| 899 | * update the HW tail register indicating the presence of |
| 900 | * new descriptors. |
| 901 | */ |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 902 | writel(qi->free_head << DMAR_IQ_SHIFT, iommu->reg + DMAR_IQT_REG); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 903 | |
| 904 | while (qi->desc_status[wait_index] != QI_DONE) { |
Suresh Siddha | f05810c | 2008-10-16 16:31:54 -0700 | [diff] [blame] | 905 | /* |
| 906 | * We will leave the interrupts disabled, to prevent interrupt |
| 907 | * context to queue another cmd while a cmd is already submitted |
| 908 | * and waiting for completion on this cpu. This is to avoid |
| 909 | * a deadlock where the interrupt context can wait indefinitely |
| 910 | * for free slots in the queue. |
| 911 | */ |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 912 | rc = qi_check_fault(iommu, index); |
| 913 | if (rc) |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 914 | break; |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 915 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 916 | raw_spin_unlock(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 917 | cpu_relax(); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 918 | raw_spin_lock(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 919 | } |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 920 | |
| 921 | qi->desc_status[index] = QI_DONE; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 922 | |
| 923 | reclaim_free_desc(qi); |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 924 | raw_spin_unlock_irqrestore(&qi->q_lock, flags); |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 925 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 926 | if (rc == -EAGAIN) |
| 927 | goto restart; |
| 928 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 929 | return rc; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | /* |
| 933 | * Flush the global interrupt entry cache. |
| 934 | */ |
| 935 | void qi_global_iec(struct intel_iommu *iommu) |
| 936 | { |
| 937 | struct qi_desc desc; |
| 938 | |
| 939 | desc.low = QI_IEC_TYPE; |
| 940 | desc.high = 0; |
| 941 | |
Yu Zhao | 704126a | 2009-01-04 16:28:52 +0800 | [diff] [blame] | 942 | /* should never fail */ |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 943 | qi_submit_sync(&desc, iommu); |
| 944 | } |
| 945 | |
David Woodhouse | 4c25a2c | 2009-05-10 17:16:06 +0100 | [diff] [blame] | 946 | void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm, |
| 947 | u64 type) |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 948 | { |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 949 | struct qi_desc desc; |
| 950 | |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 951 | desc.low = QI_CC_FM(fm) | QI_CC_SID(sid) | QI_CC_DID(did) |
| 952 | | QI_CC_GRAN(type) | QI_CC_TYPE; |
| 953 | desc.high = 0; |
| 954 | |
David Woodhouse | 4c25a2c | 2009-05-10 17:16:06 +0100 | [diff] [blame] | 955 | qi_submit_sync(&desc, iommu); |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 956 | } |
| 957 | |
David Woodhouse | 1f0ef2a | 2009-05-10 19:58:49 +0100 | [diff] [blame] | 958 | void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr, |
| 959 | unsigned int size_order, u64 type) |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 960 | { |
| 961 | u8 dw = 0, dr = 0; |
| 962 | |
| 963 | struct qi_desc desc; |
| 964 | int ih = 0; |
| 965 | |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 966 | if (cap_write_drain(iommu->cap)) |
| 967 | dw = 1; |
| 968 | |
| 969 | if (cap_read_drain(iommu->cap)) |
| 970 | dr = 1; |
| 971 | |
| 972 | desc.low = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw) |
| 973 | | QI_IOTLB_GRAN(type) | QI_IOTLB_TYPE; |
| 974 | desc.high = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih) |
| 975 | | QI_IOTLB_AM(size_order); |
| 976 | |
David Woodhouse | 1f0ef2a | 2009-05-10 19:58:49 +0100 | [diff] [blame] | 977 | qi_submit_sync(&desc, iommu); |
Youquan Song | 3481f21 | 2008-10-16 16:31:55 -0700 | [diff] [blame] | 978 | } |
| 979 | |
Yu Zhao | 6ba6c3a | 2009-05-18 13:51:35 +0800 | [diff] [blame] | 980 | void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep, |
| 981 | u64 addr, unsigned mask) |
| 982 | { |
| 983 | struct qi_desc desc; |
| 984 | |
| 985 | if (mask) { |
| 986 | BUG_ON(addr & ((1 << (VTD_PAGE_SHIFT + mask)) - 1)); |
| 987 | addr |= (1 << (VTD_PAGE_SHIFT + mask - 1)) - 1; |
| 988 | desc.high = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE; |
| 989 | } else |
| 990 | desc.high = QI_DEV_IOTLB_ADDR(addr); |
| 991 | |
| 992 | if (qdep >= QI_DEV_IOTLB_MAX_INVS) |
| 993 | qdep = 0; |
| 994 | |
| 995 | desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) | |
| 996 | QI_DIOTLB_TYPE; |
| 997 | |
| 998 | qi_submit_sync(&desc, iommu); |
| 999 | } |
| 1000 | |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1001 | /* |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 1002 | * Disable Queued Invalidation interface. |
| 1003 | */ |
| 1004 | void dmar_disable_qi(struct intel_iommu *iommu) |
| 1005 | { |
| 1006 | unsigned long flags; |
| 1007 | u32 sts; |
| 1008 | cycles_t start_time = get_cycles(); |
| 1009 | |
| 1010 | if (!ecap_qis(iommu->ecap)) |
| 1011 | return; |
| 1012 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1013 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 1014 | |
| 1015 | sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); |
| 1016 | if (!(sts & DMA_GSTS_QIES)) |
| 1017 | goto end; |
| 1018 | |
| 1019 | /* |
| 1020 | * Give a chance to HW to complete the pending invalidation requests. |
| 1021 | */ |
| 1022 | while ((readl(iommu->reg + DMAR_IQT_REG) != |
| 1023 | readl(iommu->reg + DMAR_IQH_REG)) && |
| 1024 | (DMAR_OPERATION_TIMEOUT > (get_cycles() - start_time))) |
| 1025 | cpu_relax(); |
| 1026 | |
| 1027 | iommu->gcmd &= ~DMA_GCMD_QIE; |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 1028 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); |
| 1029 | |
| 1030 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, |
| 1031 | !(sts & DMA_GSTS_QIES), sts); |
| 1032 | end: |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1033 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
Suresh Siddha | eba67e5 | 2009-03-16 17:04:56 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | /* |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1037 | * Enable queued invalidation. |
| 1038 | */ |
| 1039 | static void __dmar_enable_qi(struct intel_iommu *iommu) |
| 1040 | { |
David Woodhouse | c416daa | 2009-05-10 20:30:58 +0100 | [diff] [blame] | 1041 | u32 sts; |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1042 | unsigned long flags; |
| 1043 | struct q_inval *qi = iommu->qi; |
| 1044 | |
| 1045 | qi->free_head = qi->free_tail = 0; |
| 1046 | qi->free_cnt = QI_LENGTH; |
| 1047 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1048 | raw_spin_lock_irqsave(&iommu->register_lock, flags); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1049 | |
| 1050 | /* write zero to the tail reg */ |
| 1051 | writel(0, iommu->reg + DMAR_IQT_REG); |
| 1052 | |
| 1053 | dmar_writeq(iommu->reg + DMAR_IQA_REG, virt_to_phys(qi->desc)); |
| 1054 | |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1055 | iommu->gcmd |= DMA_GCMD_QIE; |
David Woodhouse | c416daa | 2009-05-10 20:30:58 +0100 | [diff] [blame] | 1056 | writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1057 | |
| 1058 | /* Make sure hardware complete it */ |
| 1059 | IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_QIES), sts); |
| 1060 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1061 | raw_spin_unlock_irqrestore(&iommu->register_lock, flags); |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | /* |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1065 | * Enable Queued Invalidation interface. This is a must to support |
| 1066 | * interrupt-remapping. Also used by DMA-remapping, which replaces |
| 1067 | * register based IOTLB invalidation. |
| 1068 | */ |
| 1069 | int dmar_enable_qi(struct intel_iommu *iommu) |
| 1070 | { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1071 | struct q_inval *qi; |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1072 | struct page *desc_page; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1073 | |
| 1074 | if (!ecap_qis(iommu->ecap)) |
| 1075 | return -ENOENT; |
| 1076 | |
| 1077 | /* |
| 1078 | * queued invalidation is already setup and enabled. |
| 1079 | */ |
| 1080 | if (iommu->qi) |
| 1081 | return 0; |
| 1082 | |
Suresh Siddha | fa4b57c | 2009-03-16 17:05:05 -0700 | [diff] [blame] | 1083 | iommu->qi = kmalloc(sizeof(*qi), GFP_ATOMIC); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1084 | if (!iommu->qi) |
| 1085 | return -ENOMEM; |
| 1086 | |
| 1087 | qi = iommu->qi; |
| 1088 | |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1089 | |
| 1090 | desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO, 0); |
| 1091 | if (!desc_page) { |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1092 | kfree(qi); |
Jiang Liu | b707cb0 | 2014-01-06 14:18:26 +0800 | [diff] [blame] | 1093 | iommu->qi = NULL; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1094 | return -ENOMEM; |
| 1095 | } |
| 1096 | |
Suresh Siddha | 751cafe | 2009-10-02 11:01:22 -0700 | [diff] [blame] | 1097 | qi->desc = page_address(desc_page); |
| 1098 | |
Hannes Reinecke | 37a4071 | 2013-02-06 09:50:10 +0100 | [diff] [blame] | 1099 | qi->desc_status = kzalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1100 | if (!qi->desc_status) { |
| 1101 | free_page((unsigned long) qi->desc); |
| 1102 | kfree(qi); |
Jiang Liu | b707cb0 | 2014-01-06 14:18:26 +0800 | [diff] [blame] | 1103 | iommu->qi = NULL; |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1104 | return -ENOMEM; |
| 1105 | } |
| 1106 | |
| 1107 | qi->free_head = qi->free_tail = 0; |
| 1108 | qi->free_cnt = QI_LENGTH; |
| 1109 | |
Thomas Gleixner | 3b8f404 | 2011-07-19 17:02:07 +0200 | [diff] [blame] | 1110 | raw_spin_lock_init(&qi->q_lock); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1111 | |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1112 | __dmar_enable_qi(iommu); |
Suresh Siddha | fe962e9 | 2008-07-10 11:16:42 -0700 | [diff] [blame] | 1113 | |
| 1114 | return 0; |
| 1115 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1116 | |
| 1117 | /* iommu interrupt handling. Most stuff are MSI-like. */ |
| 1118 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1119 | enum faulttype { |
| 1120 | DMA_REMAP, |
| 1121 | INTR_REMAP, |
| 1122 | UNKNOWN, |
| 1123 | }; |
| 1124 | |
| 1125 | static const char *dma_remap_fault_reasons[] = |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1126 | { |
| 1127 | "Software", |
| 1128 | "Present bit in root entry is clear", |
| 1129 | "Present bit in context entry is clear", |
| 1130 | "Invalid context entry", |
| 1131 | "Access beyond MGAW", |
| 1132 | "PTE Write access is not set", |
| 1133 | "PTE Read access is not set", |
| 1134 | "Next page table ptr is invalid", |
| 1135 | "Root table address invalid", |
| 1136 | "Context table ptr is invalid", |
| 1137 | "non-zero reserved fields in RTP", |
| 1138 | "non-zero reserved fields in CTP", |
| 1139 | "non-zero reserved fields in PTE", |
Li, Zhen-Hua | 4ecccd9 | 2013-03-06 10:43:17 +0800 | [diff] [blame] | 1140 | "PCE for translation request specifies blocking", |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1141 | }; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1142 | |
Suresh Siddha | 95a02e9 | 2012-03-30 11:47:07 -0700 | [diff] [blame] | 1143 | static const char *irq_remap_fault_reasons[] = |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1144 | { |
| 1145 | "Detected reserved fields in the decoded interrupt-remapped request", |
| 1146 | "Interrupt index exceeded the interrupt-remapping table size", |
| 1147 | "Present field in the IRTE entry is clear", |
| 1148 | "Error accessing interrupt-remapping table pointed by IRTA_REG", |
| 1149 | "Detected reserved fields in the IRTE entry", |
| 1150 | "Blocked a compatibility format interrupt request", |
| 1151 | "Blocked an interrupt request due to source-id verification failure", |
| 1152 | }; |
| 1153 | |
Rashika Kheria | 21004dc | 2013-12-18 12:01:46 +0530 | [diff] [blame] | 1154 | 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] | 1155 | { |
Dan Carpenter | fefe1ed | 2012-05-13 20:09:38 +0300 | [diff] [blame] | 1156 | if (fault_reason >= 0x20 && (fault_reason - 0x20 < |
| 1157 | ARRAY_SIZE(irq_remap_fault_reasons))) { |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1158 | *fault_type = INTR_REMAP; |
Suresh Siddha | 95a02e9 | 2012-03-30 11:47:07 -0700 | [diff] [blame] | 1159 | return irq_remap_fault_reasons[fault_reason - 0x20]; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1160 | } else if (fault_reason < ARRAY_SIZE(dma_remap_fault_reasons)) { |
| 1161 | *fault_type = DMA_REMAP; |
| 1162 | return dma_remap_fault_reasons[fault_reason]; |
| 1163 | } else { |
| 1164 | *fault_type = UNKNOWN; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1165 | return "Unknown"; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1166 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1167 | } |
| 1168 | |
Thomas Gleixner | 5c2837f | 2010-09-28 17:15:11 +0200 | [diff] [blame] | 1169 | void dmar_msi_unmask(struct irq_data *data) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1170 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1171 | struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1172 | unsigned long flag; |
| 1173 | |
| 1174 | /* unmask it */ |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1175 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1176 | writel(0, iommu->reg + DMAR_FECTL_REG); |
| 1177 | /* Read a reg to force flush the post write */ |
| 1178 | readl(iommu->reg + DMAR_FECTL_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1179 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1180 | } |
| 1181 | |
Thomas Gleixner | 5c2837f | 2010-09-28 17:15:11 +0200 | [diff] [blame] | 1182 | void dmar_msi_mask(struct irq_data *data) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1183 | { |
| 1184 | unsigned long flag; |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1185 | struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1186 | |
| 1187 | /* mask it */ |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1188 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1189 | writel(DMA_FECTL_IM, iommu->reg + DMAR_FECTL_REG); |
| 1190 | /* Read a reg to force flush the post write */ |
| 1191 | readl(iommu->reg + DMAR_FECTL_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1192 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1193 | } |
| 1194 | |
| 1195 | void dmar_msi_write(int irq, struct msi_msg *msg) |
| 1196 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1197 | struct intel_iommu *iommu = irq_get_handler_data(irq); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1198 | unsigned long flag; |
| 1199 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1200 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1201 | writel(msg->data, iommu->reg + DMAR_FEDATA_REG); |
| 1202 | writel(msg->address_lo, iommu->reg + DMAR_FEADDR_REG); |
| 1203 | writel(msg->address_hi, iommu->reg + DMAR_FEUADDR_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1204 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | void dmar_msi_read(int irq, struct msi_msg *msg) |
| 1208 | { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1209 | struct intel_iommu *iommu = irq_get_handler_data(irq); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1210 | unsigned long flag; |
| 1211 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1212 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1213 | msg->data = readl(iommu->reg + DMAR_FEDATA_REG); |
| 1214 | msg->address_lo = readl(iommu->reg + DMAR_FEADDR_REG); |
| 1215 | msg->address_hi = readl(iommu->reg + DMAR_FEUADDR_REG); |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1216 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | static int dmar_fault_do_one(struct intel_iommu *iommu, int type, |
| 1220 | u8 fault_reason, u16 source_id, unsigned long long addr) |
| 1221 | { |
| 1222 | const char *reason; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1223 | int fault_type; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1224 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1225 | reason = dmar_get_fault_reason(fault_reason, &fault_type); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1226 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1227 | if (fault_type == INTR_REMAP) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1228 | pr_err("INTR-REMAP: Request device [[%02x:%02x.%d] " |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1229 | "fault index %llx\n" |
| 1230 | "INTR-REMAP:[fault reason %02d] %s\n", |
| 1231 | (source_id >> 8), PCI_SLOT(source_id & 0xFF), |
| 1232 | PCI_FUNC(source_id & 0xFF), addr >> 48, |
| 1233 | fault_reason, reason); |
| 1234 | else |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1235 | pr_err("DMAR:[%s] Request device [%02x:%02x.%d] " |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1236 | "fault addr %llx \n" |
| 1237 | "DMAR:[fault reason %02d] %s\n", |
| 1238 | (type ? "DMA Read" : "DMA Write"), |
| 1239 | (source_id >> 8), PCI_SLOT(source_id & 0xFF), |
| 1240 | PCI_FUNC(source_id & 0xFF), addr, fault_reason, reason); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1241 | return 0; |
| 1242 | } |
| 1243 | |
| 1244 | #define PRIMARY_FAULT_REG_LEN (16) |
Suresh Siddha | 1531a6a | 2009-03-16 17:04:57 -0700 | [diff] [blame] | 1245 | irqreturn_t dmar_fault(int irq, void *dev_id) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1246 | { |
| 1247 | struct intel_iommu *iommu = dev_id; |
| 1248 | int reg, fault_index; |
| 1249 | u32 fault_status; |
| 1250 | unsigned long flag; |
| 1251 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1252 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1253 | fault_status = readl(iommu->reg + DMAR_FSTS_REG); |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1254 | if (fault_status) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1255 | pr_err("DRHD: handling fault status reg %x\n", fault_status); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1256 | |
| 1257 | /* TBD: ignore advanced fault log currently */ |
| 1258 | if (!(fault_status & DMA_FSTS_PPF)) |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1259 | goto unlock_exit; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1260 | |
| 1261 | fault_index = dma_fsts_fault_record_index(fault_status); |
| 1262 | reg = cap_fault_reg_offset(iommu->cap); |
| 1263 | while (1) { |
| 1264 | u8 fault_reason; |
| 1265 | u16 source_id; |
| 1266 | u64 guest_addr; |
| 1267 | int type; |
| 1268 | u32 data; |
| 1269 | |
| 1270 | /* highest 32 bits */ |
| 1271 | data = readl(iommu->reg + reg + |
| 1272 | fault_index * PRIMARY_FAULT_REG_LEN + 12); |
| 1273 | if (!(data & DMA_FRCD_F)) |
| 1274 | break; |
| 1275 | |
| 1276 | fault_reason = dma_frcd_fault_reason(data); |
| 1277 | type = dma_frcd_type(data); |
| 1278 | |
| 1279 | data = readl(iommu->reg + reg + |
| 1280 | fault_index * PRIMARY_FAULT_REG_LEN + 8); |
| 1281 | source_id = dma_frcd_source_id(data); |
| 1282 | |
| 1283 | guest_addr = dmar_readq(iommu->reg + reg + |
| 1284 | fault_index * PRIMARY_FAULT_REG_LEN); |
| 1285 | guest_addr = dma_frcd_page_addr(guest_addr); |
| 1286 | /* clear the fault */ |
| 1287 | writel(DMA_FRCD_F, iommu->reg + reg + |
| 1288 | fault_index * PRIMARY_FAULT_REG_LEN + 12); |
| 1289 | |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1290 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1291 | |
| 1292 | dmar_fault_do_one(iommu, type, fault_reason, |
| 1293 | source_id, guest_addr); |
| 1294 | |
| 1295 | fault_index++; |
Troy Heber | 8211a7b | 2009-08-19 15:26:11 -0600 | [diff] [blame] | 1296 | if (fault_index >= cap_num_fault_regs(iommu->cap)) |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1297 | fault_index = 0; |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1298 | raw_spin_lock_irqsave(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1299 | } |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1300 | |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1301 | writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); |
| 1302 | |
| 1303 | unlock_exit: |
Thomas Gleixner | 1f5b3c3 | 2011-07-19 16:19:51 +0200 | [diff] [blame] | 1304 | raw_spin_unlock_irqrestore(&iommu->register_lock, flag); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1305 | return IRQ_HANDLED; |
| 1306 | } |
| 1307 | |
| 1308 | int dmar_set_interrupt(struct intel_iommu *iommu) |
| 1309 | { |
| 1310 | int irq, ret; |
| 1311 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1312 | /* |
| 1313 | * Check if the fault interrupt is already initialized. |
| 1314 | */ |
| 1315 | if (iommu->irq) |
| 1316 | return 0; |
| 1317 | |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1318 | irq = create_irq(); |
| 1319 | if (!irq) { |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1320 | pr_err("IOMMU: no free vectors\n"); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1321 | return -EINVAL; |
| 1322 | } |
| 1323 | |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1324 | irq_set_handler_data(irq, iommu); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1325 | iommu->irq = irq; |
| 1326 | |
| 1327 | ret = arch_setup_dmar_msi(irq); |
| 1328 | if (ret) { |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 1329 | irq_set_handler_data(irq, NULL); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1330 | iommu->irq = 0; |
| 1331 | destroy_irq(irq); |
Chris Wright | dd72643 | 2009-05-13 15:55:52 -0700 | [diff] [blame] | 1332 | return ret; |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1333 | } |
| 1334 | |
Thomas Gleixner | 477694e | 2011-07-19 16:25:42 +0200 | [diff] [blame] | 1335 | ret = request_irq(irq, dmar_fault, IRQF_NO_THREAD, iommu->name, iommu); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1336 | if (ret) |
Donald Dutile | bf947fcb | 2012-06-04 17:29:01 -0400 | [diff] [blame] | 1337 | pr_err("IOMMU: can't request irq\n"); |
Suresh Siddha | 0ac2491 | 2009-03-16 17:04:54 -0700 | [diff] [blame] | 1338 | return ret; |
| 1339 | } |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1340 | |
| 1341 | int __init enable_drhd_fault_handling(void) |
| 1342 | { |
| 1343 | struct dmar_drhd_unit *drhd; |
Jiang Liu | 7c91977 | 2014-01-06 14:18:18 +0800 | [diff] [blame] | 1344 | struct intel_iommu *iommu; |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1345 | |
| 1346 | /* |
| 1347 | * Enable fault control interrupt. |
| 1348 | */ |
Jiang Liu | 7c91977 | 2014-01-06 14:18:18 +0800 | [diff] [blame] | 1349 | for_each_iommu(iommu, drhd) { |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1350 | u32 fault_status; |
Jiang Liu | 7c91977 | 2014-01-06 14:18:18 +0800 | [diff] [blame] | 1351 | int ret = dmar_set_interrupt(iommu); |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1352 | |
| 1353 | if (ret) { |
Donald Dutile | e9071b0 | 2012-06-08 17:13:11 -0400 | [diff] [blame] | 1354 | pr_err("DRHD %Lx: failed to enable fault, interrupt, ret %d\n", |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1355 | (unsigned long long)drhd->reg_base_addr, ret); |
| 1356 | return -1; |
| 1357 | } |
Suresh Siddha | 7f99d94 | 2010-11-30 22:22:29 -0800 | [diff] [blame] | 1358 | |
| 1359 | /* |
| 1360 | * Clear any previous faults. |
| 1361 | */ |
| 1362 | dmar_fault(iommu->irq, iommu); |
Li, Zhen-Hua | bd5cdad | 2013-03-25 16:20:52 +0800 | [diff] [blame] | 1363 | fault_status = readl(iommu->reg + DMAR_FSTS_REG); |
| 1364 | writel(fault_status, iommu->reg + DMAR_FSTS_REG); |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | return 0; |
| 1368 | } |
Fenghua Yu | eb4a52b | 2009-03-27 14:22:43 -0700 | [diff] [blame] | 1369 | |
| 1370 | /* |
| 1371 | * Re-enable Queued Invalidation interface. |
| 1372 | */ |
| 1373 | int dmar_reenable_qi(struct intel_iommu *iommu) |
| 1374 | { |
| 1375 | if (!ecap_qis(iommu->ecap)) |
| 1376 | return -ENOENT; |
| 1377 | |
| 1378 | if (!iommu->qi) |
| 1379 | return -ENOENT; |
| 1380 | |
| 1381 | /* |
| 1382 | * First disable queued invalidation. |
| 1383 | */ |
| 1384 | dmar_disable_qi(iommu); |
| 1385 | /* |
| 1386 | * Then enable queued invalidation again. Since there is no pending |
| 1387 | * invalidation requests now, it's safe to re-enable queued |
| 1388 | * invalidation. |
| 1389 | */ |
| 1390 | __dmar_enable_qi(iommu); |
| 1391 | |
| 1392 | return 0; |
| 1393 | } |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1394 | |
| 1395 | /* |
| 1396 | * Check interrupt remapping support in DMAR table description. |
| 1397 | */ |
Luck, Tony | 0b8973a | 2009-12-16 22:59:29 +0000 | [diff] [blame] | 1398 | int __init dmar_ir_support(void) |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1399 | { |
| 1400 | struct acpi_table_dmar *dmar; |
| 1401 | dmar = (struct acpi_table_dmar *)dmar_tbl; |
Arnaud Patard | 4f506e0 | 2010-03-25 18:02:58 +0000 | [diff] [blame] | 1402 | if (!dmar) |
| 1403 | return 0; |
Youquan Song | 074835f | 2009-09-09 12:05:39 -0400 | [diff] [blame] | 1404 | return dmar->flags & 0x1; |
| 1405 | } |
Jiang Liu | 694835d | 2014-01-06 14:18:16 +0800 | [diff] [blame] | 1406 | |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 1407 | static int __init dmar_free_unused_resources(void) |
| 1408 | { |
| 1409 | struct dmar_drhd_unit *dmaru, *dmaru_n; |
| 1410 | |
| 1411 | /* DMAR units are in use */ |
| 1412 | if (irq_remapping_enabled || intel_iommu_enabled) |
| 1413 | return 0; |
| 1414 | |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 1415 | down_write(&dmar_global_lock); |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 1416 | list_for_each_entry_safe(dmaru, dmaru_n, &dmar_drhd_units, list) { |
| 1417 | list_del(&dmaru->list); |
| 1418 | dmar_free_drhd(dmaru); |
| 1419 | } |
Jiang Liu | 3a5670e | 2014-02-19 14:07:33 +0800 | [diff] [blame] | 1420 | up_write(&dmar_global_lock); |
Jiang Liu | a868e6b | 2014-01-06 14:18:20 +0800 | [diff] [blame] | 1421 | |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | late_initcall(dmar_free_unused_resources); |
Konrad Rzeszutek Wilk | 4db77ff | 2010-08-26 13:58:04 -0400 | [diff] [blame] | 1426 | IOMMU_INIT_POST(detect_intel_iommu); |