Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 1 | /* |
Joerg Roedel | 5d0d715 | 2010-10-13 11:13:21 +0200 | [diff] [blame] | 2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
Joerg Roedel | 63ce3ae | 2015-02-04 16:12:55 +0100 | [diff] [blame] | 3 | * Author: Joerg Roedel <jroedel@suse.de> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 4 | * Leo Duran <leo.duran@amd.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 20 | #include <linux/ratelimit.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 21 | #include <linux/pci.h> |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 22 | #include <linux/acpi.h> |
Wan Zongshun | 9a4d3bf5 | 2016-04-01 09:06:05 -0400 | [diff] [blame] | 23 | #include <linux/amba/bus.h> |
Wan Zongshun | 0076cd3 | 2016-05-10 09:21:01 -0400 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 25 | #include <linux/pci-ats.h> |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 26 | #include <linux/bitmap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 28 | #include <linux/debugfs.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 29 | #include <linux/scatterlist.h> |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 30 | #include <linux/dma-mapping.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 31 | #include <linux/iommu-helper.h> |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 32 | #include <linux/iommu.h> |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 33 | #include <linux/delay.h> |
Joerg Roedel | 403f81d | 2011-06-14 16:44:25 +0200 | [diff] [blame] | 34 | #include <linux/amd-iommu.h> |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 35 | #include <linux/notifier.h> |
| 36 | #include <linux/export.h> |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 37 | #include <linux/irq.h> |
| 38 | #include <linux/msi.h> |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 39 | #include <linux/dma-contiguous.h> |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 40 | #include <linux/irqdomain.h> |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 41 | #include <linux/percpu.h> |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 42 | #include <linux/iova.h> |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 43 | #include <asm/irq_remapping.h> |
| 44 | #include <asm/io_apic.h> |
| 45 | #include <asm/apic.h> |
| 46 | #include <asm/hw_irq.h> |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 47 | #include <asm/msidef.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 48 | #include <asm/proto.h> |
FUJITA Tomonori | 46a7fa2 | 2008-07-11 10:23:42 +0900 | [diff] [blame] | 49 | #include <asm/iommu.h> |
Joerg Roedel | 1d9b16d | 2008-11-27 18:39:15 +0100 | [diff] [blame] | 50 | #include <asm/gart.h> |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 51 | #include <asm/dma.h> |
Joerg Roedel | 403f81d | 2011-06-14 16:44:25 +0200 | [diff] [blame] | 52 | |
| 53 | #include "amd_iommu_proto.h" |
| 54 | #include "amd_iommu_types.h" |
Joerg Roedel | 6b474b8 | 2012-06-26 16:46:04 +0200 | [diff] [blame] | 55 | #include "irq_remapping.h" |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 56 | |
| 57 | #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) |
| 58 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 59 | #define LOOP_TIMEOUT 100000 |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 60 | |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 61 | /* IO virtual address start page frame number */ |
| 62 | #define IOVA_START_PFN (1) |
| 63 | #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) |
| 64 | #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) |
| 65 | |
Joerg Roedel | 81cd07b | 2016-07-07 18:01:10 +0200 | [diff] [blame] | 66 | /* Reserved IOVA ranges */ |
| 67 | #define MSI_RANGE_START (0xfee00000) |
| 68 | #define MSI_RANGE_END (0xfeefffff) |
| 69 | #define HT_RANGE_START (0xfd00000000ULL) |
| 70 | #define HT_RANGE_END (0xffffffffffULL) |
| 71 | |
Ohad Ben-Cohen | aa3de9c | 2011-11-10 11:32:29 +0200 | [diff] [blame] | 72 | /* |
| 73 | * This bitmap is used to advertise the page sizes our hardware support |
| 74 | * to the IOMMU core, which will then use this information to split |
| 75 | * physically contiguous memory regions it is mapping into page sizes |
| 76 | * that we support. |
| 77 | * |
Joerg Roedel | 954e3dd | 2012-12-02 15:35:37 +0100 | [diff] [blame] | 78 | * 512GB Pages are not supported due to a hardware bug |
Ohad Ben-Cohen | aa3de9c | 2011-11-10 11:32:29 +0200 | [diff] [blame] | 79 | */ |
Joerg Roedel | 954e3dd | 2012-12-02 15:35:37 +0100 | [diff] [blame] | 80 | #define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38)) |
Ohad Ben-Cohen | aa3de9c | 2011-11-10 11:32:29 +0200 | [diff] [blame] | 81 | |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 82 | static DEFINE_RWLOCK(amd_iommu_devtable_lock); |
| 83 | |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 84 | /* List of all available dev_data structures */ |
| 85 | static LIST_HEAD(dev_data_list); |
| 86 | static DEFINE_SPINLOCK(dev_data_list_lock); |
| 87 | |
Joerg Roedel | 6efed63 | 2012-06-14 15:52:58 +0200 | [diff] [blame] | 88 | LIST_HEAD(ioapic_map); |
| 89 | LIST_HEAD(hpet_map); |
Wan Zongshun | 2a0cb4e | 2016-04-01 09:06:00 -0400 | [diff] [blame] | 90 | LIST_HEAD(acpihid_map); |
Joerg Roedel | 6efed63 | 2012-06-14 15:52:58 +0200 | [diff] [blame] | 91 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 92 | /* |
| 93 | * Domain for untranslated devices - only allocated |
| 94 | * if iommu=pt passed on kernel cmd line. |
| 95 | */ |
Thierry Reding | b22f643 | 2014-06-27 09:03:12 +0200 | [diff] [blame] | 96 | static const struct iommu_ops amd_iommu_ops; |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 97 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 98 | static ATOMIC_NOTIFIER_HEAD(ppr_notifier); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 99 | int amd_iommu_max_glx_val = -1; |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 100 | |
Joerg Roedel | ac1534a | 2012-06-21 14:52:40 +0200 | [diff] [blame] | 101 | static struct dma_map_ops amd_iommu_dma_ops; |
| 102 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 103 | /* |
Joerg Roedel | 50917e2 | 2014-08-05 16:38:38 +0200 | [diff] [blame] | 104 | * This struct contains device specific data for the IOMMU |
| 105 | */ |
| 106 | struct iommu_dev_data { |
| 107 | struct list_head list; /* For domain->dev_list */ |
| 108 | struct list_head dev_data_list; /* For global dev_data_list */ |
Joerg Roedel | 50917e2 | 2014-08-05 16:38:38 +0200 | [diff] [blame] | 109 | struct protection_domain *domain; /* Domain the device is bound to */ |
Joerg Roedel | 50917e2 | 2014-08-05 16:38:38 +0200 | [diff] [blame] | 110 | u16 devid; /* PCI Device ID */ |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 111 | u16 alias; /* Alias Device ID */ |
Joerg Roedel | 50917e2 | 2014-08-05 16:38:38 +0200 | [diff] [blame] | 112 | bool iommu_v2; /* Device can make use of IOMMUv2 */ |
Joerg Roedel | 1e6a7b0 | 2015-07-28 16:58:48 +0200 | [diff] [blame] | 113 | bool passthrough; /* Device is identity mapped */ |
Joerg Roedel | 50917e2 | 2014-08-05 16:38:38 +0200 | [diff] [blame] | 114 | struct { |
| 115 | bool enabled; |
| 116 | int qdep; |
| 117 | } ats; /* ATS state */ |
| 118 | bool pri_tlp; /* PASID TLB required for |
| 119 | PPR completions */ |
| 120 | u32 errata; /* Bitmap for errata to apply */ |
| 121 | }; |
| 122 | |
| 123 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 124 | * general struct to manage commands send to an IOMMU |
| 125 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 126 | struct iommu_cmd { |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 127 | u32 data[4]; |
| 128 | }; |
| 129 | |
Joerg Roedel | 05152a0 | 2012-06-15 16:53:51 +0200 | [diff] [blame] | 130 | struct kmem_cache *amd_iommu_irq_cache; |
| 131 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 132 | static void update_domain(struct protection_domain *domain); |
Joerg Roedel | 7a5a566 | 2015-06-30 08:56:11 +0200 | [diff] [blame] | 133 | static int protection_domain_init(struct protection_domain *domain); |
Joerg Roedel | b6809ee | 2016-02-26 16:48:59 +0100 | [diff] [blame] | 134 | static void detach_device(struct device *dev); |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 135 | |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 136 | /* |
| 137 | * For dynamic growth the aperture size is split into ranges of 128MB of |
| 138 | * DMA address space each. This struct represents one such range. |
| 139 | */ |
| 140 | struct aperture_range { |
| 141 | |
Joerg Roedel | 08c5fb9 | 2015-12-21 13:04:49 +0100 | [diff] [blame] | 142 | spinlock_t bitmap_lock; |
| 143 | |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 144 | /* address allocation bitmap */ |
| 145 | unsigned long *bitmap; |
Joerg Roedel | ae62d49 | 2015-12-21 16:28:45 +0100 | [diff] [blame] | 146 | unsigned long offset; |
Joerg Roedel | 60e6a7c | 2015-12-21 16:53:17 +0100 | [diff] [blame] | 147 | unsigned long next_bit; |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 148 | |
| 149 | /* |
| 150 | * Array of PTE pages for the aperture. In this array we save all the |
| 151 | * leaf pages of the domain page table used for the aperture. This way |
| 152 | * we don't need to walk the page table to find a specific PTE. We can |
| 153 | * just calculate its address in constant time. |
| 154 | */ |
| 155 | u64 *pte_pages[64]; |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 156 | }; |
| 157 | |
| 158 | /* |
| 159 | * Data container for a dma_ops specific protection domain |
| 160 | */ |
| 161 | struct dma_ops_domain { |
| 162 | /* generic protection domain information */ |
| 163 | struct protection_domain domain; |
| 164 | |
| 165 | /* size of the aperture for the mappings */ |
| 166 | unsigned long aperture_size; |
| 167 | |
Joerg Roedel | ebaecb4 | 2015-12-21 18:11:32 +0100 | [diff] [blame] | 168 | /* aperture index we start searching for free addresses */ |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 169 | u32 __percpu *next_index; |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 170 | |
| 171 | /* address space relevant data */ |
| 172 | struct aperture_range *aperture[APERTURE_MAX_RANGES]; |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 173 | |
| 174 | /* IOVA RB-Tree */ |
| 175 | struct iova_domain iovad; |
Joerg Roedel | 007b74b | 2015-12-21 12:53:54 +0100 | [diff] [blame] | 176 | }; |
| 177 | |
Joerg Roedel | 81cd07b | 2016-07-07 18:01:10 +0200 | [diff] [blame] | 178 | static struct iova_domain reserved_iova_ranges; |
| 179 | static struct lock_class_key reserved_rbtree_key; |
| 180 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 181 | /**************************************************************************** |
| 182 | * |
| 183 | * Helper functions |
| 184 | * |
| 185 | ****************************************************************************/ |
| 186 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 187 | static inline int match_hid_uid(struct device *dev, |
| 188 | struct acpihid_map_entry *entry) |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 189 | { |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 190 | const char *hid, *uid; |
| 191 | |
| 192 | hid = acpi_device_hid(ACPI_COMPANION(dev)); |
| 193 | uid = acpi_device_uid(ACPI_COMPANION(dev)); |
| 194 | |
| 195 | if (!hid || !(*hid)) |
| 196 | return -ENODEV; |
| 197 | |
| 198 | if (!uid || !(*uid)) |
| 199 | return strcmp(hid, entry->hid); |
| 200 | |
| 201 | if (!(*entry->uid)) |
| 202 | return strcmp(hid, entry->hid); |
| 203 | |
| 204 | return (strcmp(hid, entry->hid) || strcmp(uid, entry->uid)); |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 205 | } |
| 206 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 207 | static inline u16 get_pci_device_id(struct device *dev) |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 208 | { |
| 209 | struct pci_dev *pdev = to_pci_dev(dev); |
| 210 | |
| 211 | return PCI_DEVID(pdev->bus->number, pdev->devfn); |
| 212 | } |
| 213 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 214 | static inline int get_acpihid_device_id(struct device *dev, |
| 215 | struct acpihid_map_entry **entry) |
| 216 | { |
| 217 | struct acpihid_map_entry *p; |
| 218 | |
| 219 | list_for_each_entry(p, &acpihid_map, list) { |
| 220 | if (!match_hid_uid(dev, p)) { |
| 221 | if (entry) |
| 222 | *entry = p; |
| 223 | return p->devid; |
| 224 | } |
| 225 | } |
| 226 | return -EINVAL; |
| 227 | } |
| 228 | |
| 229 | static inline int get_device_id(struct device *dev) |
| 230 | { |
| 231 | int devid; |
| 232 | |
| 233 | if (dev_is_pci(dev)) |
| 234 | devid = get_pci_device_id(dev); |
| 235 | else |
| 236 | devid = get_acpihid_device_id(dev, NULL); |
| 237 | |
| 238 | return devid; |
| 239 | } |
| 240 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 241 | static struct protection_domain *to_pdomain(struct iommu_domain *dom) |
| 242 | { |
| 243 | return container_of(dom, struct protection_domain, domain); |
| 244 | } |
| 245 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 246 | static struct iommu_dev_data *alloc_dev_data(u16 devid) |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 247 | { |
| 248 | struct iommu_dev_data *dev_data; |
| 249 | unsigned long flags; |
| 250 | |
| 251 | dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL); |
| 252 | if (!dev_data) |
| 253 | return NULL; |
| 254 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 255 | dev_data->devid = devid; |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 256 | |
| 257 | spin_lock_irqsave(&dev_data_list_lock, flags); |
| 258 | list_add_tail(&dev_data->dev_data_list, &dev_data_list); |
| 259 | spin_unlock_irqrestore(&dev_data_list_lock, flags); |
| 260 | |
| 261 | return dev_data; |
| 262 | } |
| 263 | |
Joerg Roedel | 3b03bb7 | 2011-06-09 18:53:25 +0200 | [diff] [blame] | 264 | static struct iommu_dev_data *search_dev_data(u16 devid) |
| 265 | { |
| 266 | struct iommu_dev_data *dev_data; |
| 267 | unsigned long flags; |
| 268 | |
| 269 | spin_lock_irqsave(&dev_data_list_lock, flags); |
| 270 | list_for_each_entry(dev_data, &dev_data_list, dev_data_list) { |
| 271 | if (dev_data->devid == devid) |
| 272 | goto out_unlock; |
| 273 | } |
| 274 | |
| 275 | dev_data = NULL; |
| 276 | |
| 277 | out_unlock: |
| 278 | spin_unlock_irqrestore(&dev_data_list_lock, flags); |
| 279 | |
| 280 | return dev_data; |
| 281 | } |
| 282 | |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 283 | static int __last_alias(struct pci_dev *pdev, u16 alias, void *data) |
| 284 | { |
| 285 | *(u16 *)data = alias; |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | static u16 get_alias(struct device *dev) |
| 290 | { |
| 291 | struct pci_dev *pdev = to_pci_dev(dev); |
| 292 | u16 devid, ivrs_alias, pci_alias; |
| 293 | |
Joerg Roedel | 6c0b43d | 2016-05-09 19:39:17 +0200 | [diff] [blame] | 294 | /* The callers make sure that get_device_id() does not fail here */ |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 295 | devid = get_device_id(dev); |
| 296 | ivrs_alias = amd_iommu_alias_table[devid]; |
| 297 | pci_for_each_dma_alias(pdev, __last_alias, &pci_alias); |
| 298 | |
| 299 | if (ivrs_alias == pci_alias) |
| 300 | return ivrs_alias; |
| 301 | |
| 302 | /* |
| 303 | * DMA alias showdown |
| 304 | * |
| 305 | * The IVRS is fairly reliable in telling us about aliases, but it |
| 306 | * can't know about every screwy device. If we don't have an IVRS |
| 307 | * reported alias, use the PCI reported alias. In that case we may |
| 308 | * still need to initialize the rlookup and dev_table entries if the |
| 309 | * alias is to a non-existent device. |
| 310 | */ |
| 311 | if (ivrs_alias == devid) { |
| 312 | if (!amd_iommu_rlookup_table[pci_alias]) { |
| 313 | amd_iommu_rlookup_table[pci_alias] = |
| 314 | amd_iommu_rlookup_table[devid]; |
| 315 | memcpy(amd_iommu_dev_table[pci_alias].data, |
| 316 | amd_iommu_dev_table[devid].data, |
| 317 | sizeof(amd_iommu_dev_table[pci_alias].data)); |
| 318 | } |
| 319 | |
| 320 | return pci_alias; |
| 321 | } |
| 322 | |
| 323 | pr_info("AMD-Vi: Using IVRS reported alias %02x:%02x.%d " |
| 324 | "for device %s[%04x:%04x], kernel reported alias " |
| 325 | "%02x:%02x.%d\n", PCI_BUS_NUM(ivrs_alias), PCI_SLOT(ivrs_alias), |
| 326 | PCI_FUNC(ivrs_alias), dev_name(dev), pdev->vendor, pdev->device, |
| 327 | PCI_BUS_NUM(pci_alias), PCI_SLOT(pci_alias), |
| 328 | PCI_FUNC(pci_alias)); |
| 329 | |
| 330 | /* |
| 331 | * If we don't have a PCI DMA alias and the IVRS alias is on the same |
| 332 | * bus, then the IVRS table may know about a quirk that we don't. |
| 333 | */ |
| 334 | if (pci_alias == devid && |
| 335 | PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) { |
Linus Torvalds | 7afd16f | 2016-05-19 13:10:54 -0700 | [diff] [blame] | 336 | pci_add_dma_alias(pdev, ivrs_alias & 0xff); |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 337 | pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n", |
| 338 | PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias), |
| 339 | dev_name(dev)); |
| 340 | } |
| 341 | |
| 342 | return ivrs_alias; |
| 343 | } |
| 344 | |
Joerg Roedel | 3b03bb7 | 2011-06-09 18:53:25 +0200 | [diff] [blame] | 345 | static struct iommu_dev_data *find_dev_data(u16 devid) |
| 346 | { |
| 347 | struct iommu_dev_data *dev_data; |
| 348 | |
| 349 | dev_data = search_dev_data(devid); |
| 350 | |
| 351 | if (dev_data == NULL) |
| 352 | dev_data = alloc_dev_data(devid); |
| 353 | |
| 354 | return dev_data; |
| 355 | } |
| 356 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 357 | static struct iommu_dev_data *get_dev_data(struct device *dev) |
| 358 | { |
| 359 | return dev->archdata.iommu; |
| 360 | } |
| 361 | |
Wan Zongshun | b097d11 | 2016-04-01 09:06:04 -0400 | [diff] [blame] | 362 | /* |
| 363 | * Find or create an IOMMU group for a acpihid device. |
| 364 | */ |
| 365 | static struct iommu_group *acpihid_device_group(struct device *dev) |
| 366 | { |
| 367 | struct acpihid_map_entry *p, *entry = NULL; |
Dan Carpenter | 2d8e1f0 | 2016-04-11 10:14:46 +0300 | [diff] [blame] | 368 | int devid; |
Wan Zongshun | b097d11 | 2016-04-01 09:06:04 -0400 | [diff] [blame] | 369 | |
| 370 | devid = get_acpihid_device_id(dev, &entry); |
| 371 | if (devid < 0) |
| 372 | return ERR_PTR(devid); |
| 373 | |
| 374 | list_for_each_entry(p, &acpihid_map, list) { |
| 375 | if ((devid == p->devid) && p->group) |
| 376 | entry->group = p->group; |
| 377 | } |
| 378 | |
| 379 | if (!entry->group) |
| 380 | entry->group = generic_device_group(dev); |
| 381 | |
| 382 | return entry->group; |
| 383 | } |
| 384 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 385 | static bool pci_iommuv2_capable(struct pci_dev *pdev) |
| 386 | { |
| 387 | static const int caps[] = { |
| 388 | PCI_EXT_CAP_ID_ATS, |
Joerg Roedel | 46277b7 | 2011-12-07 14:34:02 +0100 | [diff] [blame] | 389 | PCI_EXT_CAP_ID_PRI, |
| 390 | PCI_EXT_CAP_ID_PASID, |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 391 | }; |
| 392 | int i, pos; |
| 393 | |
| 394 | for (i = 0; i < 3; ++i) { |
| 395 | pos = pci_find_ext_capability(pdev, caps[i]); |
| 396 | if (pos == 0) |
| 397 | return false; |
| 398 | } |
| 399 | |
| 400 | return true; |
| 401 | } |
| 402 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 403 | static bool pdev_pri_erratum(struct pci_dev *pdev, u32 erratum) |
| 404 | { |
| 405 | struct iommu_dev_data *dev_data; |
| 406 | |
| 407 | dev_data = get_dev_data(&pdev->dev); |
| 408 | |
| 409 | return dev_data->errata & (1 << erratum) ? true : false; |
| 410 | } |
| 411 | |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 412 | /* |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 413 | * This function actually applies the mapping to the page table of the |
| 414 | * dma_ops domain. |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 415 | */ |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 416 | static void alloc_unity_mapping(struct dma_ops_domain *dma_dom, |
| 417 | struct unity_map_entry *e) |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 418 | { |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 419 | u64 addr; |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 420 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 421 | for (addr = e->address_start; addr < e->address_end; |
| 422 | addr += PAGE_SIZE) { |
| 423 | if (addr < dma_dom->aperture_size) |
| 424 | __set_bit(addr >> PAGE_SHIFT, |
| 425 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 426 | } |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 427 | } |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 428 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 429 | /* |
| 430 | * Inits the unity mappings required for a specific device |
| 431 | */ |
| 432 | static void init_unity_mappings_for_device(struct device *dev, |
| 433 | struct dma_ops_domain *dma_dom) |
| 434 | { |
| 435 | struct unity_map_entry *e; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 436 | int devid; |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 437 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 438 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 439 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 440 | return; |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 441 | |
| 442 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 443 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 444 | continue; |
| 445 | alloc_unity_mapping(dma_dom, e); |
| 446 | } |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 449 | /* |
| 450 | * This function checks if the driver got a valid device from the caller to |
| 451 | * avoid dereferencing invalid pointers. |
| 452 | */ |
| 453 | static bool check_device(struct device *dev) |
| 454 | { |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 455 | int devid; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 456 | |
| 457 | if (!dev || !dev->dma_mask) |
| 458 | return false; |
| 459 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 460 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 461 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 462 | return false; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 463 | |
| 464 | /* Out of our scope? */ |
| 465 | if (devid > amd_iommu_last_bdf) |
| 466 | return false; |
| 467 | |
| 468 | if (amd_iommu_rlookup_table[devid] == NULL) |
| 469 | return false; |
| 470 | |
| 471 | return true; |
| 472 | } |
| 473 | |
Alex Williamson | 25b11ce | 2014-09-19 10:03:13 -0600 | [diff] [blame] | 474 | static void init_iommu_group(struct device *dev) |
Alex Williamson | 2851db2 | 2012-10-08 22:49:41 -0600 | [diff] [blame] | 475 | { |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 476 | struct dma_ops_domain *dma_domain; |
| 477 | struct iommu_domain *domain; |
Alex Williamson | 2851db2 | 2012-10-08 22:49:41 -0600 | [diff] [blame] | 478 | struct iommu_group *group; |
Alex Williamson | 2851db2 | 2012-10-08 22:49:41 -0600 | [diff] [blame] | 479 | |
Alex Williamson | 65d5352 | 2014-07-03 09:51:30 -0600 | [diff] [blame] | 480 | group = iommu_group_get_for_dev(dev); |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 481 | if (IS_ERR(group)) |
| 482 | return; |
| 483 | |
| 484 | domain = iommu_group_default_domain(group); |
| 485 | if (!domain) |
| 486 | goto out; |
| 487 | |
Joerg Roedel | b548e78 | 2016-07-13 12:35:24 +0200 | [diff] [blame] | 488 | if (to_pdomain(domain)->flags == PD_DMA_OPS_MASK) { |
| 489 | dma_domain = to_pdomain(domain)->priv; |
| 490 | init_unity_mappings_for_device(dev, dma_domain); |
| 491 | } |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 492 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 493 | out: |
| 494 | iommu_group_put(group); |
Alex Williamson | eb9c952 | 2012-10-08 22:49:35 -0600 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | static int iommu_init_device(struct device *dev) |
| 498 | { |
Alex Williamson | eb9c952 | 2012-10-08 22:49:35 -0600 | [diff] [blame] | 499 | struct iommu_dev_data *dev_data; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 500 | int devid; |
Alex Williamson | eb9c952 | 2012-10-08 22:49:35 -0600 | [diff] [blame] | 501 | |
| 502 | if (dev->archdata.iommu) |
| 503 | return 0; |
| 504 | |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 505 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 506 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 507 | return devid; |
| 508 | |
| 509 | dev_data = find_dev_data(devid); |
Alex Williamson | eb9c952 | 2012-10-08 22:49:35 -0600 | [diff] [blame] | 510 | if (!dev_data) |
| 511 | return -ENOMEM; |
| 512 | |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 513 | dev_data->alias = get_alias(dev); |
| 514 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 515 | if (dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) { |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 516 | struct amd_iommu *iommu; |
| 517 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 518 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 519 | dev_data->iommu_v2 = iommu->is_iommu_v2; |
| 520 | } |
| 521 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 522 | dev->archdata.iommu = dev_data; |
| 523 | |
Alex Williamson | 066f2e9 | 2014-06-12 16:12:37 -0600 | [diff] [blame] | 524 | iommu_device_link(amd_iommu_rlookup_table[dev_data->devid]->iommu_dev, |
| 525 | dev); |
| 526 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 527 | return 0; |
| 528 | } |
| 529 | |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 530 | static void iommu_ignore_device(struct device *dev) |
| 531 | { |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 532 | u16 alias; |
| 533 | int devid; |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 534 | |
| 535 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 536 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 537 | return; |
| 538 | |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 539 | alias = get_alias(dev); |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 540 | |
| 541 | memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry)); |
| 542 | memset(&amd_iommu_dev_table[alias], 0, sizeof(struct dev_table_entry)); |
| 543 | |
| 544 | amd_iommu_rlookup_table[devid] = NULL; |
| 545 | amd_iommu_rlookup_table[alias] = NULL; |
| 546 | } |
| 547 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 548 | static void iommu_uninit_device(struct device *dev) |
| 549 | { |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 550 | int devid; |
| 551 | struct iommu_dev_data *dev_data; |
Alex Williamson | c193109 | 2014-07-03 09:51:24 -0600 | [diff] [blame] | 552 | |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 553 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 554 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 555 | return; |
| 556 | |
| 557 | dev_data = search_dev_data(devid); |
Alex Williamson | c193109 | 2014-07-03 09:51:24 -0600 | [diff] [blame] | 558 | if (!dev_data) |
| 559 | return; |
| 560 | |
Joerg Roedel | b6809ee | 2016-02-26 16:48:59 +0100 | [diff] [blame] | 561 | if (dev_data->domain) |
| 562 | detach_device(dev); |
| 563 | |
Alex Williamson | 066f2e9 | 2014-06-12 16:12:37 -0600 | [diff] [blame] | 564 | iommu_device_unlink(amd_iommu_rlookup_table[dev_data->devid]->iommu_dev, |
| 565 | dev); |
| 566 | |
Alex Williamson | 9dcd613 | 2012-05-30 14:19:07 -0600 | [diff] [blame] | 567 | iommu_group_remove_device(dev); |
| 568 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 569 | /* Remove dma-ops */ |
| 570 | dev->archdata.dma_ops = NULL; |
| 571 | |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 572 | /* |
Alex Williamson | c193109 | 2014-07-03 09:51:24 -0600 | [diff] [blame] | 573 | * We keep dev_data around for unplugged devices and reuse it when the |
| 574 | * device is re-plugged - not doing so would introduce a ton of races. |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 575 | */ |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 576 | } |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 577 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 578 | /**************************************************************************** |
| 579 | * |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 580 | * Interrupt handling functions |
| 581 | * |
| 582 | ****************************************************************************/ |
| 583 | |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 584 | static void dump_dte_entry(u16 devid) |
| 585 | { |
| 586 | int i; |
| 587 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 588 | for (i = 0; i < 4; ++i) |
| 589 | pr_err("AMD-Vi: DTE[%d]: %016llx\n", i, |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 590 | amd_iommu_dev_table[devid].data[i]); |
| 591 | } |
| 592 | |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 593 | static void dump_command(unsigned long phys_addr) |
| 594 | { |
| 595 | struct iommu_cmd *cmd = phys_to_virt(phys_addr); |
| 596 | int i; |
| 597 | |
| 598 | for (i = 0; i < 4; ++i) |
| 599 | pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); |
| 600 | } |
| 601 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 602 | static void iommu_print_event(struct amd_iommu *iommu, void *__evt) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 603 | { |
Joerg Roedel | 3d06fca | 2012-04-12 14:12:00 +0200 | [diff] [blame] | 604 | int type, devid, domid, flags; |
| 605 | volatile u32 *event = __evt; |
| 606 | int count = 0; |
| 607 | u64 address; |
| 608 | |
| 609 | retry: |
| 610 | type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; |
| 611 | devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; |
| 612 | domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; |
| 613 | flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; |
| 614 | address = (u64)(((u64)event[3]) << 32) | event[2]; |
| 615 | |
| 616 | if (type == 0) { |
| 617 | /* Did we hit the erratum? */ |
| 618 | if (++count == LOOP_TIMEOUT) { |
| 619 | pr_err("AMD-Vi: No event written to event log\n"); |
| 620 | return; |
| 621 | } |
| 622 | udelay(1); |
| 623 | goto retry; |
| 624 | } |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 625 | |
Joerg Roedel | 4c6f40d | 2009-09-01 16:43:58 +0200 | [diff] [blame] | 626 | printk(KERN_ERR "AMD-Vi: Event logged ["); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 627 | |
| 628 | switch (type) { |
| 629 | case EVENT_TYPE_ILL_DEV: |
| 630 | printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " |
| 631 | "address=0x%016llx flags=0x%04x]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 632 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 633 | address, flags); |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 634 | dump_dte_entry(devid); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 635 | break; |
| 636 | case EVENT_TYPE_IO_FAULT: |
| 637 | printk("IO_PAGE_FAULT device=%02x:%02x.%x " |
| 638 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 639 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 640 | domid, address, flags); |
| 641 | break; |
| 642 | case EVENT_TYPE_DEV_TAB_ERR: |
| 643 | printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 644 | "address=0x%016llx flags=0x%04x]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 645 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 646 | address, flags); |
| 647 | break; |
| 648 | case EVENT_TYPE_PAGE_TAB_ERR: |
| 649 | printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 650 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 651 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 652 | domid, address, flags); |
| 653 | break; |
| 654 | case EVENT_TYPE_ILL_CMD: |
| 655 | printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 656 | dump_command(address); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 657 | break; |
| 658 | case EVENT_TYPE_CMD_HARD_ERR: |
| 659 | printk("COMMAND_HARDWARE_ERROR address=0x%016llx " |
| 660 | "flags=0x%04x]\n", address, flags); |
| 661 | break; |
| 662 | case EVENT_TYPE_IOTLB_INV_TO: |
| 663 | printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " |
| 664 | "address=0x%016llx]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 665 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 666 | address); |
| 667 | break; |
| 668 | case EVENT_TYPE_INV_DEV_REQ: |
| 669 | printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " |
| 670 | "address=0x%016llx flags=0x%04x]\n", |
Shuah Khan | c5081cd | 2013-02-27 17:07:19 -0700 | [diff] [blame] | 671 | PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 672 | address, flags); |
| 673 | break; |
| 674 | default: |
| 675 | printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); |
| 676 | } |
Joerg Roedel | 3d06fca | 2012-04-12 14:12:00 +0200 | [diff] [blame] | 677 | |
| 678 | memset(__evt, 0, 4 * sizeof(u32)); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | static void iommu_poll_events(struct amd_iommu *iommu) |
| 682 | { |
| 683 | u32 head, tail; |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 684 | |
| 685 | head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 686 | tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); |
| 687 | |
| 688 | while (head != tail) { |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 689 | iommu_print_event(iommu, iommu->evt_buf + head); |
Joerg Roedel | deba4bc | 2015-10-20 17:33:41 +0200 | [diff] [blame] | 690 | head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE; |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 691 | } |
| 692 | |
| 693 | writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 694 | } |
| 695 | |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 696 | static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u64 *raw) |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 697 | { |
| 698 | struct amd_iommu_fault fault; |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 699 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 700 | if (PPR_REQ_TYPE(raw[0]) != PPR_REQ_FAULT) { |
| 701 | pr_err_ratelimited("AMD-Vi: Unknown PPR request received\n"); |
| 702 | return; |
| 703 | } |
| 704 | |
| 705 | fault.address = raw[1]; |
| 706 | fault.pasid = PPR_PASID(raw[0]); |
| 707 | fault.device_id = PPR_DEVID(raw[0]); |
| 708 | fault.tag = PPR_TAG(raw[0]); |
| 709 | fault.flags = PPR_FLAGS(raw[0]); |
| 710 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 711 | atomic_notifier_call_chain(&ppr_notifier, 0, &fault); |
| 712 | } |
| 713 | |
| 714 | static void iommu_poll_ppr_log(struct amd_iommu *iommu) |
| 715 | { |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 716 | u32 head, tail; |
| 717 | |
| 718 | if (iommu->ppr_log == NULL) |
| 719 | return; |
| 720 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 721 | head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); |
| 722 | tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); |
| 723 | |
| 724 | while (head != tail) { |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 725 | volatile u64 *raw; |
| 726 | u64 entry[2]; |
| 727 | int i; |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 728 | |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 729 | raw = (u64 *)(iommu->ppr_log + head); |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 730 | |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 731 | /* |
| 732 | * Hardware bug: Interrupt may arrive before the entry is |
| 733 | * written to memory. If this happens we need to wait for the |
| 734 | * entry to arrive. |
| 735 | */ |
| 736 | for (i = 0; i < LOOP_TIMEOUT; ++i) { |
| 737 | if (PPR_REQ_TYPE(raw[0]) != 0) |
| 738 | break; |
| 739 | udelay(1); |
| 740 | } |
| 741 | |
| 742 | /* Avoid memcpy function-call overhead */ |
| 743 | entry[0] = raw[0]; |
| 744 | entry[1] = raw[1]; |
| 745 | |
| 746 | /* |
| 747 | * To detect the hardware bug we need to clear the entry |
| 748 | * back to zero. |
| 749 | */ |
| 750 | raw[0] = raw[1] = 0UL; |
| 751 | |
| 752 | /* Update head pointer of hardware ring-buffer */ |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 753 | head = (head + PPR_ENTRY_SIZE) % PPR_LOG_SIZE; |
| 754 | writel(head, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 755 | |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 756 | /* Handle PPR entry */ |
| 757 | iommu_handle_ppr_entry(iommu, entry); |
| 758 | |
Joerg Roedel | eee5353 | 2012-06-01 15:20:23 +0200 | [diff] [blame] | 759 | /* Refresh ring-buffer information */ |
| 760 | head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 761 | tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); |
| 762 | } |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 763 | } |
| 764 | |
Joerg Roedel | 72fe00f | 2011-05-10 10:50:42 +0200 | [diff] [blame] | 765 | irqreturn_t amd_iommu_int_thread(int irq, void *data) |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 766 | { |
Suravee Suthikulpanit | 3f398bc | 2013-04-22 16:32:34 -0500 | [diff] [blame] | 767 | struct amd_iommu *iommu = (struct amd_iommu *) data; |
| 768 | u32 status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 769 | |
Suravee Suthikulpanit | 3f398bc | 2013-04-22 16:32:34 -0500 | [diff] [blame] | 770 | while (status & (MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK)) { |
| 771 | /* Enable EVT and PPR interrupts again */ |
| 772 | writel((MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK), |
| 773 | iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 774 | |
| 775 | if (status & MMIO_STATUS_EVT_INT_MASK) { |
| 776 | pr_devel("AMD-Vi: Processing IOMMU Event Log\n"); |
| 777 | iommu_poll_events(iommu); |
| 778 | } |
| 779 | |
| 780 | if (status & MMIO_STATUS_PPR_INT_MASK) { |
| 781 | pr_devel("AMD-Vi: Processing IOMMU PPR Log\n"); |
| 782 | iommu_poll_ppr_log(iommu); |
| 783 | } |
| 784 | |
| 785 | /* |
| 786 | * Hardware bug: ERBT1312 |
| 787 | * When re-enabling interrupt (by writing 1 |
| 788 | * to clear the bit), the hardware might also try to set |
| 789 | * the interrupt bit in the event status register. |
| 790 | * In this scenario, the bit will be set, and disable |
| 791 | * subsequent interrupts. |
| 792 | * |
| 793 | * Workaround: The IOMMU driver should read back the |
| 794 | * status register and check if the interrupt bits are cleared. |
| 795 | * If not, driver will need to go through the interrupt handler |
| 796 | * again and re-clear the bits |
| 797 | */ |
| 798 | status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 799 | } |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 800 | return IRQ_HANDLED; |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 801 | } |
| 802 | |
Joerg Roedel | 72fe00f | 2011-05-10 10:50:42 +0200 | [diff] [blame] | 803 | irqreturn_t amd_iommu_int_handler(int irq, void *data) |
| 804 | { |
| 805 | return IRQ_WAKE_THREAD; |
| 806 | } |
| 807 | |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 808 | /**************************************************************************** |
| 809 | * |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 810 | * IOMMU command queuing functions |
| 811 | * |
| 812 | ****************************************************************************/ |
| 813 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 814 | static int wait_on_sem(volatile u64 *sem) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 815 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 816 | int i = 0; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 817 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 818 | while (*sem == 0 && i < LOOP_TIMEOUT) { |
| 819 | udelay(1); |
| 820 | i += 1; |
| 821 | } |
| 822 | |
| 823 | if (i == LOOP_TIMEOUT) { |
| 824 | pr_alert("AMD-Vi: Completion-Wait loop timed out\n"); |
| 825 | return -EIO; |
| 826 | } |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 827 | |
| 828 | return 0; |
| 829 | } |
| 830 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 831 | static void copy_cmd_to_buffer(struct amd_iommu *iommu, |
| 832 | struct iommu_cmd *cmd, |
| 833 | u32 tail) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 834 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 835 | u8 *target; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 836 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 837 | target = iommu->cmd_buf + tail; |
Joerg Roedel | deba4bc | 2015-10-20 17:33:41 +0200 | [diff] [blame] | 838 | tail = (tail + sizeof(*cmd)) % CMD_BUFFER_SIZE; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 839 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 840 | /* Copy command to buffer */ |
| 841 | memcpy(target, cmd, sizeof(*cmd)); |
| 842 | |
| 843 | /* Tell the IOMMU about it */ |
| 844 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 845 | } |
| 846 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 847 | static void build_completion_wait(struct iommu_cmd *cmd, u64 address) |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 848 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 849 | WARN_ON(address & 0x7ULL); |
| 850 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 851 | memset(cmd, 0, sizeof(*cmd)); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 852 | cmd->data[0] = lower_32_bits(__pa(address)) | CMD_COMPL_WAIT_STORE_MASK; |
| 853 | cmd->data[1] = upper_32_bits(__pa(address)); |
| 854 | cmd->data[2] = 1; |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 855 | CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); |
| 856 | } |
| 857 | |
Joerg Roedel | 94fe79e | 2011-04-06 11:07:21 +0200 | [diff] [blame] | 858 | static void build_inv_dte(struct iommu_cmd *cmd, u16 devid) |
| 859 | { |
| 860 | memset(cmd, 0, sizeof(*cmd)); |
| 861 | cmd->data[0] = devid; |
| 862 | CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY); |
| 863 | } |
| 864 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 865 | static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 866 | size_t size, u16 domid, int pde) |
| 867 | { |
| 868 | u64 pages; |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 869 | bool s; |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 870 | |
| 871 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 872 | s = false; |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 873 | |
| 874 | if (pages > 1) { |
| 875 | /* |
| 876 | * If we have to flush more than one page, flush all |
| 877 | * TLB entries for this domain |
| 878 | */ |
| 879 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 880 | s = true; |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | address &= PAGE_MASK; |
| 884 | |
| 885 | memset(cmd, 0, sizeof(*cmd)); |
| 886 | cmd->data[1] |= domid; |
| 887 | cmd->data[2] = lower_32_bits(address); |
| 888 | cmd->data[3] = upper_32_bits(address); |
| 889 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 890 | if (s) /* size bit - we flush more than one 4kb page */ |
| 891 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
Frank Arnold | df805ab | 2012-08-27 19:21:04 +0200 | [diff] [blame] | 892 | if (pde) /* PDE bit - we want to flush everything, not only the PTEs */ |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 893 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 894 | } |
| 895 | |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 896 | static void build_inv_iotlb_pages(struct iommu_cmd *cmd, u16 devid, int qdep, |
| 897 | u64 address, size_t size) |
| 898 | { |
| 899 | u64 pages; |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 900 | bool s; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 901 | |
| 902 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 903 | s = false; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 904 | |
| 905 | if (pages > 1) { |
| 906 | /* |
| 907 | * If we have to flush more than one page, flush all |
| 908 | * TLB entries for this domain |
| 909 | */ |
| 910 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
Quentin Lambert | ae0cbbb | 2015-02-04 11:40:07 +0100 | [diff] [blame] | 911 | s = true; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | address &= PAGE_MASK; |
| 915 | |
| 916 | memset(cmd, 0, sizeof(*cmd)); |
| 917 | cmd->data[0] = devid; |
| 918 | cmd->data[0] |= (qdep & 0xff) << 24; |
| 919 | cmd->data[1] = devid; |
| 920 | cmd->data[2] = lower_32_bits(address); |
| 921 | cmd->data[3] = upper_32_bits(address); |
| 922 | CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES); |
| 923 | if (s) |
| 924 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 925 | } |
| 926 | |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 927 | static void build_inv_iommu_pasid(struct iommu_cmd *cmd, u16 domid, int pasid, |
| 928 | u64 address, bool size) |
| 929 | { |
| 930 | memset(cmd, 0, sizeof(*cmd)); |
| 931 | |
| 932 | address &= ~(0xfffULL); |
| 933 | |
Suravee Suthikulpanit | a919a01 | 2014-03-05 18:54:18 -0600 | [diff] [blame] | 934 | cmd->data[0] = pasid; |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 935 | cmd->data[1] = domid; |
| 936 | cmd->data[2] = lower_32_bits(address); |
| 937 | cmd->data[3] = upper_32_bits(address); |
| 938 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 939 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; |
| 940 | if (size) |
| 941 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 942 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 943 | } |
| 944 | |
| 945 | static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid, |
| 946 | int qdep, u64 address, bool size) |
| 947 | { |
| 948 | memset(cmd, 0, sizeof(*cmd)); |
| 949 | |
| 950 | address &= ~(0xfffULL); |
| 951 | |
| 952 | cmd->data[0] = devid; |
Jay Cornwall | e8d2d82 | 2014-02-26 15:49:31 -0600 | [diff] [blame] | 953 | cmd->data[0] |= ((pasid >> 8) & 0xff) << 16; |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 954 | cmd->data[0] |= (qdep & 0xff) << 24; |
| 955 | cmd->data[1] = devid; |
Jay Cornwall | e8d2d82 | 2014-02-26 15:49:31 -0600 | [diff] [blame] | 956 | cmd->data[1] |= (pasid & 0xff) << 16; |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 957 | cmd->data[2] = lower_32_bits(address); |
| 958 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; |
| 959 | cmd->data[3] = upper_32_bits(address); |
| 960 | if (size) |
| 961 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 962 | CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES); |
| 963 | } |
| 964 | |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 965 | static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid, |
| 966 | int status, int tag, bool gn) |
| 967 | { |
| 968 | memset(cmd, 0, sizeof(*cmd)); |
| 969 | |
| 970 | cmd->data[0] = devid; |
| 971 | if (gn) { |
Suravee Suthikulpanit | a919a01 | 2014-03-05 18:54:18 -0600 | [diff] [blame] | 972 | cmd->data[1] = pasid; |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 973 | cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK; |
| 974 | } |
| 975 | cmd->data[3] = tag & 0x1ff; |
| 976 | cmd->data[3] |= (status & PPR_STATUS_MASK) << PPR_STATUS_SHIFT; |
| 977 | |
| 978 | CMD_SET_TYPE(cmd, CMD_COMPLETE_PPR); |
| 979 | } |
| 980 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 981 | static void build_inv_all(struct iommu_cmd *cmd) |
| 982 | { |
| 983 | memset(cmd, 0, sizeof(*cmd)); |
| 984 | CMD_SET_TYPE(cmd, CMD_INV_ALL); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 985 | } |
| 986 | |
Joerg Roedel | 7ef2798 | 2012-06-21 16:46:04 +0200 | [diff] [blame] | 987 | static void build_inv_irt(struct iommu_cmd *cmd, u16 devid) |
| 988 | { |
| 989 | memset(cmd, 0, sizeof(*cmd)); |
| 990 | cmd->data[0] = devid; |
| 991 | CMD_SET_TYPE(cmd, CMD_INV_IRT); |
| 992 | } |
| 993 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 994 | /* |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 995 | * Writes the command to the IOMMUs command buffer and informs the |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 996 | * hardware about the new command. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 997 | */ |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 998 | static int iommu_queue_command_sync(struct amd_iommu *iommu, |
| 999 | struct iommu_cmd *cmd, |
| 1000 | bool sync) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1001 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1002 | u32 left, tail, head, next_tail; |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1003 | unsigned long flags; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1004 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1005 | again: |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1006 | spin_lock_irqsave(&iommu->lock, flags); |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1007 | |
| 1008 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 1009 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
Joerg Roedel | deba4bc | 2015-10-20 17:33:41 +0200 | [diff] [blame] | 1010 | next_tail = (tail + sizeof(*cmd)) % CMD_BUFFER_SIZE; |
| 1011 | left = (head - next_tail) % CMD_BUFFER_SIZE; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1012 | |
| 1013 | if (left <= 2) { |
| 1014 | struct iommu_cmd sync_cmd; |
| 1015 | volatile u64 sem = 0; |
| 1016 | int ret; |
| 1017 | |
| 1018 | build_completion_wait(&sync_cmd, (u64)&sem); |
| 1019 | copy_cmd_to_buffer(iommu, &sync_cmd, tail); |
| 1020 | |
| 1021 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 1022 | |
| 1023 | if ((ret = wait_on_sem(&sem)) != 0) |
| 1024 | return ret; |
| 1025 | |
| 1026 | goto again; |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 1027 | } |
| 1028 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1029 | copy_cmd_to_buffer(iommu, cmd, tail); |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 1030 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1031 | /* We need to sync now to make sure all commands are processed */ |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 1032 | iommu->need_sync = sync; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1033 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1034 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 1035 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1036 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1037 | } |
| 1038 | |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 1039 | static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) |
| 1040 | { |
| 1041 | return iommu_queue_command_sync(iommu, cmd, true); |
| 1042 | } |
| 1043 | |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1044 | /* |
| 1045 | * This function queues a completion wait command into the command |
| 1046 | * buffer of an IOMMU |
| 1047 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1048 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 1049 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1050 | struct iommu_cmd cmd; |
| 1051 | volatile u64 sem = 0; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1052 | int ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1053 | |
| 1054 | if (!iommu->need_sync) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1055 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1056 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1057 | build_completion_wait(&cmd, (u64)&sem); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1058 | |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 1059 | ret = iommu_queue_command_sync(iommu, &cmd, false); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1060 | if (ret) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 1061 | return ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 1062 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 1063 | return wait_on_sem(&sem); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1064 | } |
| 1065 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1066 | static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1067 | { |
| 1068 | struct iommu_cmd cmd; |
| 1069 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1070 | build_inv_dte(&cmd, devid); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1071 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1072 | return iommu_queue_command(iommu, &cmd); |
| 1073 | } |
| 1074 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1075 | static void iommu_flush_dte_all(struct amd_iommu *iommu) |
| 1076 | { |
| 1077 | u32 devid; |
| 1078 | |
| 1079 | for (devid = 0; devid <= 0xffff; ++devid) |
| 1080 | iommu_flush_dte(iommu, devid); |
| 1081 | |
| 1082 | iommu_completion_wait(iommu); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1083 | } |
| 1084 | |
| 1085 | /* |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1086 | * This function uses heavy locking and may disable irqs for some time. But |
| 1087 | * this is no issue because it is only called during resume. |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1088 | */ |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1089 | static void iommu_flush_tlb_all(struct amd_iommu *iommu) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1090 | { |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1091 | u32 dom_id; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1092 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1093 | for (dom_id = 0; dom_id <= 0xffff; ++dom_id) { |
| 1094 | struct iommu_cmd cmd; |
| 1095 | build_inv_iommu_pages(&cmd, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, |
| 1096 | dom_id, 1); |
| 1097 | iommu_queue_command(iommu, &cmd); |
| 1098 | } |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1099 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1100 | iommu_completion_wait(iommu); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1101 | } |
| 1102 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 1103 | static void iommu_flush_all(struct amd_iommu *iommu) |
| 1104 | { |
| 1105 | struct iommu_cmd cmd; |
| 1106 | |
| 1107 | build_inv_all(&cmd); |
| 1108 | |
| 1109 | iommu_queue_command(iommu, &cmd); |
| 1110 | iommu_completion_wait(iommu); |
| 1111 | } |
| 1112 | |
Joerg Roedel | 7ef2798 | 2012-06-21 16:46:04 +0200 | [diff] [blame] | 1113 | static void iommu_flush_irt(struct amd_iommu *iommu, u16 devid) |
| 1114 | { |
| 1115 | struct iommu_cmd cmd; |
| 1116 | |
| 1117 | build_inv_irt(&cmd, devid); |
| 1118 | |
| 1119 | iommu_queue_command(iommu, &cmd); |
| 1120 | } |
| 1121 | |
| 1122 | static void iommu_flush_irt_all(struct amd_iommu *iommu) |
| 1123 | { |
| 1124 | u32 devid; |
| 1125 | |
| 1126 | for (devid = 0; devid <= MAX_DEV_TABLE_ENTRIES; devid++) |
| 1127 | iommu_flush_irt(iommu, devid); |
| 1128 | |
| 1129 | iommu_completion_wait(iommu); |
| 1130 | } |
| 1131 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1132 | void iommu_flush_all_caches(struct amd_iommu *iommu) |
| 1133 | { |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 1134 | if (iommu_feature(iommu, FEATURE_IA)) { |
| 1135 | iommu_flush_all(iommu); |
| 1136 | } else { |
| 1137 | iommu_flush_dte_all(iommu); |
Joerg Roedel | 7ef2798 | 2012-06-21 16:46:04 +0200 | [diff] [blame] | 1138 | iommu_flush_irt_all(iommu); |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 1139 | iommu_flush_tlb_all(iommu); |
| 1140 | } |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 1141 | } |
| 1142 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1143 | /* |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1144 | * Command send function for flushing on-device TLB |
| 1145 | */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1146 | static int device_flush_iotlb(struct iommu_dev_data *dev_data, |
| 1147 | u64 address, size_t size) |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1148 | { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1149 | struct amd_iommu *iommu; |
| 1150 | struct iommu_cmd cmd; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1151 | int qdep; |
| 1152 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 1153 | qdep = dev_data->ats.qdep; |
| 1154 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1155 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 1156 | build_inv_iotlb_pages(&cmd, dev_data->devid, qdep, address, size); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1157 | |
| 1158 | return iommu_queue_command(iommu, &cmd); |
| 1159 | } |
| 1160 | |
| 1161 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1162 | * Command send function for invalidating a device table entry |
| 1163 | */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1164 | static int device_flush_dte(struct iommu_dev_data *dev_data) |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1165 | { |
| 1166 | struct amd_iommu *iommu; |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 1167 | u16 alias; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1168 | int ret; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1169 | |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1170 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 1171 | alias = dev_data->alias; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1172 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 1173 | ret = iommu_flush_dte(iommu, dev_data->devid); |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 1174 | if (!ret && alias != dev_data->devid) |
| 1175 | ret = iommu_flush_dte(iommu, alias); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1176 | if (ret) |
| 1177 | return ret; |
| 1178 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 1179 | if (dev_data->ats.enabled) |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1180 | ret = device_flush_iotlb(dev_data, 0, ~0UL); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1181 | |
| 1182 | return ret; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1183 | } |
| 1184 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1185 | /* |
| 1186 | * TLB invalidation function which is called from the mapping functions. |
| 1187 | * It invalidates a single PTE if the range to flush is within a single |
| 1188 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 1189 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1190 | static void __domain_flush_pages(struct protection_domain *domain, |
| 1191 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1192 | { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1193 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 1194 | struct iommu_cmd cmd; |
| 1195 | int ret = 0, i; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1196 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 1197 | build_inv_iommu_pages(&cmd, address, size, domain->id, pde); |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 1198 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1199 | for (i = 0; i < amd_iommus_present; ++i) { |
| 1200 | if (!domain->dev_iommu[i]) |
| 1201 | continue; |
| 1202 | |
| 1203 | /* |
| 1204 | * Devices of this domain are behind this IOMMU |
| 1205 | * We need a TLB flush |
| 1206 | */ |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 1207 | ret |= iommu_queue_command(amd_iommus[i], &cmd); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1208 | } |
| 1209 | |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1210 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1211 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 1212 | if (!dev_data->ats.enabled) |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1213 | continue; |
| 1214 | |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1215 | ret |= device_flush_iotlb(dev_data, address, size); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 1216 | } |
| 1217 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 1218 | WARN_ON(ret); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1219 | } |
| 1220 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1221 | static void domain_flush_pages(struct protection_domain *domain, |
| 1222 | u64 address, size_t size) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1223 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1224 | __domain_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 1225 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 1226 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1227 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1228 | static void domain_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1229 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1230 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1231 | } |
| 1232 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 1233 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1234 | static void domain_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 1235 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1236 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
| 1237 | } |
| 1238 | |
| 1239 | static void domain_flush_complete(struct protection_domain *domain) |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 1240 | { |
| 1241 | int i; |
| 1242 | |
| 1243 | for (i = 0; i < amd_iommus_present; ++i) { |
| 1244 | if (!domain->dev_iommu[i]) |
| 1245 | continue; |
| 1246 | |
| 1247 | /* |
| 1248 | * Devices of this domain are behind this IOMMU |
| 1249 | * We need to wait for completion of all commands. |
| 1250 | */ |
| 1251 | iommu_completion_wait(amd_iommus[i]); |
| 1252 | } |
| 1253 | } |
| 1254 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1255 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 1256 | /* |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1257 | * This function flushes the DTEs for all devices in domain |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 1258 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1259 | static void domain_flush_devices(struct protection_domain *domain) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 1260 | { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1261 | struct iommu_dev_data *dev_data; |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1262 | |
| 1263 | list_for_each_entry(dev_data, &domain->dev_list, list) |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1264 | device_flush_dte(dev_data); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1265 | } |
| 1266 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1267 | /**************************************************************************** |
| 1268 | * |
| 1269 | * The functions below are used the create the page table mappings for |
| 1270 | * unity mapped regions. |
| 1271 | * |
| 1272 | ****************************************************************************/ |
| 1273 | |
| 1274 | /* |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1275 | * This function is used to add another level to an IO page table. Adding |
| 1276 | * another level increases the size of the address space by 9 bits to a size up |
| 1277 | * to 64 bits. |
| 1278 | */ |
| 1279 | static bool increase_address_space(struct protection_domain *domain, |
| 1280 | gfp_t gfp) |
| 1281 | { |
| 1282 | u64 *pte; |
| 1283 | |
| 1284 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 1285 | /* address space already 64 bit large */ |
| 1286 | return false; |
| 1287 | |
| 1288 | pte = (void *)get_zeroed_page(gfp); |
| 1289 | if (!pte) |
| 1290 | return false; |
| 1291 | |
| 1292 | *pte = PM_LEVEL_PDE(domain->mode, |
| 1293 | virt_to_phys(domain->pt_root)); |
| 1294 | domain->pt_root = pte; |
| 1295 | domain->mode += 1; |
| 1296 | domain->updated = true; |
| 1297 | |
| 1298 | return true; |
| 1299 | } |
| 1300 | |
| 1301 | static u64 *alloc_pte(struct protection_domain *domain, |
| 1302 | unsigned long address, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1303 | unsigned long page_size, |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1304 | u64 **pte_page, |
| 1305 | gfp_t gfp) |
| 1306 | { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1307 | int level, end_lvl; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1308 | u64 *pte, *page; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1309 | |
| 1310 | BUG_ON(!is_power_of_2(page_size)); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1311 | |
| 1312 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 1313 | increase_address_space(domain, gfp); |
| 1314 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1315 | level = domain->mode - 1; |
| 1316 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 1317 | address = PAGE_SIZE_ALIGN(address, page_size); |
| 1318 | end_lvl = PAGE_SIZE_LEVEL(page_size); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1319 | |
| 1320 | while (level > end_lvl) { |
Joerg Roedel | 7bfa5bd | 2015-12-21 19:07:50 +0100 | [diff] [blame] | 1321 | u64 __pte, __npte; |
| 1322 | |
| 1323 | __pte = *pte; |
| 1324 | |
| 1325 | if (!IOMMU_PTE_PRESENT(__pte)) { |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1326 | page = (u64 *)get_zeroed_page(gfp); |
| 1327 | if (!page) |
| 1328 | return NULL; |
Joerg Roedel | 7bfa5bd | 2015-12-21 19:07:50 +0100 | [diff] [blame] | 1329 | |
| 1330 | __npte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 1331 | |
| 1332 | if (cmpxchg64(pte, __pte, __npte)) { |
| 1333 | free_page((unsigned long)page); |
| 1334 | continue; |
| 1335 | } |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1336 | } |
| 1337 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1338 | /* No level skipping support yet */ |
| 1339 | if (PM_PTE_LEVEL(*pte) != level) |
| 1340 | return NULL; |
| 1341 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1342 | level -= 1; |
| 1343 | |
| 1344 | pte = IOMMU_PTE_PAGE(*pte); |
| 1345 | |
| 1346 | if (pte_page && level == end_lvl) |
| 1347 | *pte_page = pte; |
| 1348 | |
| 1349 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 1350 | } |
| 1351 | |
| 1352 | return pte; |
| 1353 | } |
| 1354 | |
| 1355 | /* |
| 1356 | * This function checks if there is a PTE for a given dma address. If |
| 1357 | * there is one, it returns the pointer to it. |
| 1358 | */ |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 1359 | static u64 *fetch_pte(struct protection_domain *domain, |
| 1360 | unsigned long address, |
| 1361 | unsigned long *page_size) |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1362 | { |
| 1363 | int level; |
| 1364 | u64 *pte; |
| 1365 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1366 | if (address > PM_LEVEL_SIZE(domain->mode)) |
| 1367 | return NULL; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1368 | |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 1369 | level = domain->mode - 1; |
| 1370 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 1371 | *page_size = PTE_LEVEL_PAGE_SIZE(level); |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1372 | |
| 1373 | while (level > 0) { |
| 1374 | |
| 1375 | /* Not Present */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1376 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 1377 | return NULL; |
| 1378 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1379 | /* Large PTE */ |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 1380 | if (PM_PTE_LEVEL(*pte) == 7 || |
| 1381 | PM_PTE_LEVEL(*pte) == 0) |
| 1382 | break; |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1383 | |
| 1384 | /* No level skipping support yet */ |
| 1385 | if (PM_PTE_LEVEL(*pte) != level) |
| 1386 | return NULL; |
| 1387 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1388 | level -= 1; |
| 1389 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1390 | /* Walk to the next level */ |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 1391 | pte = IOMMU_PTE_PAGE(*pte); |
| 1392 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 1393 | *page_size = PTE_LEVEL_PAGE_SIZE(level); |
| 1394 | } |
| 1395 | |
| 1396 | if (PM_PTE_LEVEL(*pte) == 0x07) { |
| 1397 | unsigned long pte_mask; |
| 1398 | |
| 1399 | /* |
| 1400 | * If we have a series of large PTEs, make |
| 1401 | * sure to return a pointer to the first one. |
| 1402 | */ |
| 1403 | *page_size = pte_mask = PTE_PAGE_SIZE(*pte); |
| 1404 | pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1); |
| 1405 | pte = (u64 *)(((unsigned long)pte) & pte_mask); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | return pte; |
| 1409 | } |
| 1410 | |
| 1411 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1412 | * Generic mapping functions. It maps a physical address into a DMA |
| 1413 | * address space. It allocates the page table pages if necessary. |
| 1414 | * In the future it can be extended to a generic mapping function |
| 1415 | * supporting all features of AMD IOMMU page tables like level skipping |
| 1416 | * and full 64 bit address spaces. |
| 1417 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 1418 | static int iommu_map_page(struct protection_domain *dom, |
| 1419 | unsigned long bus_addr, |
| 1420 | unsigned long phys_addr, |
Joerg Roedel | b911b89 | 2016-07-05 14:29:11 +0200 | [diff] [blame^] | 1421 | unsigned long page_size, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1422 | int prot, |
Joerg Roedel | b911b89 | 2016-07-05 14:29:11 +0200 | [diff] [blame^] | 1423 | gfp_t gfp) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1424 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1425 | u64 __pte, *pte; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1426 | int i, count; |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1427 | |
Joerg Roedel | d4b0366 | 2015-04-01 14:58:52 +0200 | [diff] [blame] | 1428 | BUG_ON(!IS_ALIGNED(bus_addr, page_size)); |
| 1429 | BUG_ON(!IS_ALIGNED(phys_addr, page_size)); |
| 1430 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 1431 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1432 | return -EINVAL; |
| 1433 | |
Joerg Roedel | d4b0366 | 2015-04-01 14:58:52 +0200 | [diff] [blame] | 1434 | count = PAGE_SIZE_PTE_COUNT(page_size); |
Joerg Roedel | b911b89 | 2016-07-05 14:29:11 +0200 | [diff] [blame^] | 1435 | pte = alloc_pte(dom, bus_addr, page_size, NULL, gfp); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1436 | |
Maurizio Lombardi | 63eaa75 | 2014-09-11 12:28:03 +0200 | [diff] [blame] | 1437 | if (!pte) |
| 1438 | return -ENOMEM; |
| 1439 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1440 | for (i = 0; i < count; ++i) |
| 1441 | if (IOMMU_PTE_PRESENT(pte[i])) |
| 1442 | return -EBUSY; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1443 | |
Joerg Roedel | d4b0366 | 2015-04-01 14:58:52 +0200 | [diff] [blame] | 1444 | if (count > 1) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1445 | __pte = PAGE_SIZE_PTE(phys_addr, page_size); |
| 1446 | __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1447 | } else |
| 1448 | __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1449 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1450 | if (prot & IOMMU_PROT_IR) |
| 1451 | __pte |= IOMMU_PTE_IR; |
| 1452 | if (prot & IOMMU_PROT_IW) |
| 1453 | __pte |= IOMMU_PTE_IW; |
| 1454 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1455 | for (i = 0; i < count; ++i) |
| 1456 | pte[i] = __pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1457 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1458 | update_domain(dom); |
| 1459 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1460 | return 0; |
| 1461 | } |
| 1462 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1463 | static unsigned long iommu_unmap_page(struct protection_domain *dom, |
| 1464 | unsigned long bus_addr, |
| 1465 | unsigned long page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1466 | { |
Joerg Roedel | 71b390e | 2015-04-01 14:58:49 +0200 | [diff] [blame] | 1467 | unsigned long long unmapped; |
| 1468 | unsigned long unmap_size; |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1469 | u64 *pte; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1470 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1471 | BUG_ON(!is_power_of_2(page_size)); |
| 1472 | |
| 1473 | unmapped = 0; |
| 1474 | |
| 1475 | while (unmapped < page_size) { |
| 1476 | |
Joerg Roedel | 71b390e | 2015-04-01 14:58:49 +0200 | [diff] [blame] | 1477 | pte = fetch_pte(dom, bus_addr, &unmap_size); |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1478 | |
Joerg Roedel | 71b390e | 2015-04-01 14:58:49 +0200 | [diff] [blame] | 1479 | if (pte) { |
| 1480 | int i, count; |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1481 | |
Joerg Roedel | 71b390e | 2015-04-01 14:58:49 +0200 | [diff] [blame] | 1482 | count = PAGE_SIZE_PTE_COUNT(unmap_size); |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1483 | for (i = 0; i < count; i++) |
| 1484 | pte[i] = 0ULL; |
| 1485 | } |
| 1486 | |
| 1487 | bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size; |
| 1488 | unmapped += unmap_size; |
| 1489 | } |
| 1490 | |
Alex Williamson | 60d0ca3 | 2013-06-21 14:33:19 -0600 | [diff] [blame] | 1491 | BUG_ON(unmapped && !is_power_of_2(unmapped)); |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1492 | |
| 1493 | return unmapped; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1494 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1495 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1496 | /**************************************************************************** |
| 1497 | * |
| 1498 | * The next functions belong to the address allocator for the dma_ops |
| 1499 | * interface functions. They work like the allocators in the other IOMMU |
| 1500 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 1501 | * the aperture. Maybe it could be enhanced in the future to a more |
| 1502 | * efficient allocator. |
| 1503 | * |
| 1504 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1505 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1506 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1507 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1508 | * |
| 1509 | * called with domain->lock held |
| 1510 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1511 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1512 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 1513 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 1514 | * ranges. |
| 1515 | */ |
| 1516 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 1517 | unsigned long start_page, |
| 1518 | unsigned int pages) |
| 1519 | { |
| 1520 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
| 1521 | |
| 1522 | if (start_page + pages > last_page) |
| 1523 | pages = last_page - start_page; |
| 1524 | |
| 1525 | for (i = start_page; i < start_page + pages; ++i) { |
| 1526 | int index = i / APERTURE_RANGE_PAGES; |
| 1527 | int page = i % APERTURE_RANGE_PAGES; |
| 1528 | __set_bit(page, dom->aperture[index]->bitmap); |
| 1529 | } |
| 1530 | } |
| 1531 | |
| 1532 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1533 | * This function is used to add a new aperture range to an existing |
| 1534 | * aperture in case of dma_ops domain allocation or address allocation |
| 1535 | * failure. |
| 1536 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1537 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1538 | bool populate, gfp_t gfp) |
| 1539 | { |
| 1540 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 5d7c94c | 2015-04-01 14:58:50 +0200 | [diff] [blame] | 1541 | unsigned long i, old_size, pte_pgsize; |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1542 | struct aperture_range *range; |
| 1543 | struct amd_iommu *iommu; |
| 1544 | unsigned long flags; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1545 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 1546 | #ifdef CONFIG_IOMMU_STRESS |
| 1547 | populate = false; |
| 1548 | #endif |
| 1549 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1550 | if (index >= APERTURE_MAX_RANGES) |
| 1551 | return -ENOMEM; |
| 1552 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1553 | range = kzalloc(sizeof(struct aperture_range), gfp); |
| 1554 | if (!range) |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1555 | return -ENOMEM; |
| 1556 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1557 | range->bitmap = (void *)get_zeroed_page(gfp); |
| 1558 | if (!range->bitmap) |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1559 | goto out_free; |
| 1560 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1561 | range->offset = dma_dom->aperture_size; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1562 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1563 | spin_lock_init(&range->bitmap_lock); |
Joerg Roedel | 08c5fb9 | 2015-12-21 13:04:49 +0100 | [diff] [blame] | 1564 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1565 | if (populate) { |
| 1566 | unsigned long address = dma_dom->aperture_size; |
| 1567 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 1568 | u64 *pte, *pte_page; |
| 1569 | |
| 1570 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1571 | pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1572 | &pte_page, gfp); |
| 1573 | if (!pte) |
| 1574 | goto out_free; |
| 1575 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1576 | range->pte_pages[i] = pte_page; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1577 | |
| 1578 | address += APERTURE_RANGE_SIZE / 64; |
| 1579 | } |
| 1580 | } |
| 1581 | |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 1582 | spin_lock_irqsave(&dma_dom->domain.lock, flags); |
| 1583 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1584 | /* First take the bitmap_lock and then publish the range */ |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 1585 | spin_lock(&range->bitmap_lock); |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1586 | |
| 1587 | old_size = dma_dom->aperture_size; |
| 1588 | dma_dom->aperture[index] = range; |
| 1589 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1590 | |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 1591 | /* Reserve address range used for MSI messages */ |
| 1592 | if (old_size < MSI_ADDR_BASE_LO && |
| 1593 | dma_dom->aperture_size > MSI_ADDR_BASE_LO) { |
| 1594 | unsigned long spage; |
| 1595 | int pages; |
| 1596 | |
| 1597 | pages = iommu_num_pages(MSI_ADDR_BASE_LO, 0x10000, PAGE_SIZE); |
| 1598 | spage = MSI_ADDR_BASE_LO >> PAGE_SHIFT; |
| 1599 | |
| 1600 | dma_ops_reserve_addresses(dma_dom, spage, pages); |
| 1601 | } |
| 1602 | |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1603 | /* Initialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1604 | for_each_iommu(iommu) { |
| 1605 | if (iommu->exclusion_start && |
| 1606 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 1607 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 1608 | unsigned long startpage; |
| 1609 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 1610 | iommu->exclusion_length, |
| 1611 | PAGE_SIZE); |
| 1612 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 1613 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 1614 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1615 | } |
| 1616 | |
| 1617 | /* |
| 1618 | * Check for areas already mapped as present in the new aperture |
| 1619 | * range and mark those pages as reserved in the allocator. Such |
| 1620 | * mappings may already exist as a result of requested unity |
| 1621 | * mappings for devices. |
| 1622 | */ |
| 1623 | for (i = dma_dom->aperture[index]->offset; |
| 1624 | i < dma_dom->aperture_size; |
Joerg Roedel | 5d7c94c | 2015-04-01 14:58:50 +0200 | [diff] [blame] | 1625 | i += pte_pgsize) { |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 1626 | u64 *pte = fetch_pte(&dma_dom->domain, i, &pte_pgsize); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1627 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 1628 | continue; |
| 1629 | |
Joerg Roedel | 5d7c94c | 2015-04-01 14:58:50 +0200 | [diff] [blame] | 1630 | dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, |
| 1631 | pte_pgsize >> 12); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1632 | } |
| 1633 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1634 | update_domain(&dma_dom->domain); |
| 1635 | |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 1636 | spin_unlock(&range->bitmap_lock); |
| 1637 | |
| 1638 | spin_unlock_irqrestore(&dma_dom->domain.lock, flags); |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1639 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1640 | return 0; |
| 1641 | |
| 1642 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1643 | update_domain(&dma_dom->domain); |
| 1644 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1645 | free_page((unsigned long)range->bitmap); |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1646 | |
Joerg Roedel | a73c156 | 2015-12-21 19:25:56 +0100 | [diff] [blame] | 1647 | kfree(range); |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1648 | |
| 1649 | return -ENOMEM; |
| 1650 | } |
| 1651 | |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1652 | static dma_addr_t dma_ops_aperture_alloc(struct dma_ops_domain *dom, |
| 1653 | struct aperture_range *range, |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1654 | unsigned long pages, |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1655 | unsigned long dma_mask, |
| 1656 | unsigned long boundary_size, |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1657 | unsigned long align_mask, |
| 1658 | bool trylock) |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1659 | { |
| 1660 | unsigned long offset, limit, flags; |
| 1661 | dma_addr_t address; |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1662 | bool flush = false; |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1663 | |
| 1664 | offset = range->offset >> PAGE_SHIFT; |
| 1665 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 1666 | dma_mask >> PAGE_SHIFT); |
| 1667 | |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1668 | if (trylock) { |
| 1669 | if (!spin_trylock_irqsave(&range->bitmap_lock, flags)) |
| 1670 | return -1; |
| 1671 | } else { |
| 1672 | spin_lock_irqsave(&range->bitmap_lock, flags); |
| 1673 | } |
| 1674 | |
Joerg Roedel | 60e6a7c | 2015-12-21 16:53:17 +0100 | [diff] [blame] | 1675 | address = iommu_area_alloc(range->bitmap, limit, range->next_bit, |
| 1676 | pages, offset, boundary_size, align_mask); |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1677 | if (address == -1) { |
Joerg Roedel | 60e6a7c | 2015-12-21 16:53:17 +0100 | [diff] [blame] | 1678 | /* Nothing found, retry one time */ |
| 1679 | address = iommu_area_alloc(range->bitmap, limit, |
| 1680 | 0, pages, offset, boundary_size, |
| 1681 | align_mask); |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1682 | flush = true; |
| 1683 | } |
Joerg Roedel | 60e6a7c | 2015-12-21 16:53:17 +0100 | [diff] [blame] | 1684 | |
| 1685 | if (address != -1) |
| 1686 | range->next_bit = address + pages; |
| 1687 | |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1688 | spin_unlock_irqrestore(&range->bitmap_lock, flags); |
| 1689 | |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1690 | if (flush) { |
| 1691 | domain_flush_tlb(&dom->domain); |
| 1692 | domain_flush_complete(&dom->domain); |
| 1693 | } |
| 1694 | |
Joerg Roedel | a0f5144 | 2015-12-21 16:20:09 +0100 | [diff] [blame] | 1695 | return address; |
| 1696 | } |
| 1697 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1698 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 1699 | struct dma_ops_domain *dom, |
| 1700 | unsigned int pages, |
| 1701 | unsigned long align_mask, |
Joerg Roedel | 05ab49e | 2015-12-21 17:58:26 +0100 | [diff] [blame] | 1702 | u64 dma_mask) |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1703 | { |
Joerg Roedel | ab7032b | 2015-12-21 18:47:11 +0100 | [diff] [blame] | 1704 | unsigned long boundary_size, mask; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1705 | unsigned long address = -1; |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1706 | bool first = true; |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1707 | u32 start, i; |
| 1708 | |
| 1709 | preempt_disable(); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1710 | |
Joerg Roedel | e6aabee | 2015-05-27 09:26:09 +0200 | [diff] [blame] | 1711 | mask = dma_get_seg_boundary(dev); |
| 1712 | |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1713 | again: |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1714 | start = this_cpu_read(*dom->next_index); |
| 1715 | |
| 1716 | /* Sanity check - is it really necessary? */ |
| 1717 | if (unlikely(start > APERTURE_MAX_RANGES)) { |
| 1718 | start = 0; |
| 1719 | this_cpu_write(*dom->next_index, 0); |
| 1720 | } |
| 1721 | |
Joerg Roedel | e6aabee | 2015-05-27 09:26:09 +0200 | [diff] [blame] | 1722 | boundary_size = mask + 1 ? ALIGN(mask + 1, PAGE_SIZE) >> PAGE_SHIFT : |
| 1723 | 1UL << (BITS_PER_LONG - PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1724 | |
Joerg Roedel | 2a87442 | 2015-12-21 18:34:47 +0100 | [diff] [blame] | 1725 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1726 | struct aperture_range *range; |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1727 | int index; |
Joerg Roedel | ccb50e0 | 2015-12-21 17:49:34 +0100 | [diff] [blame] | 1728 | |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1729 | index = (start + i) % APERTURE_MAX_RANGES; |
| 1730 | |
| 1731 | range = dom->aperture[index]; |
Joerg Roedel | 2a87442 | 2015-12-21 18:34:47 +0100 | [diff] [blame] | 1732 | |
| 1733 | if (!range || range->offset >= dma_mask) |
| 1734 | continue; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1735 | |
Joerg Roedel | 2a87442 | 2015-12-21 18:34:47 +0100 | [diff] [blame] | 1736 | address = dma_ops_aperture_alloc(dom, range, pages, |
Joerg Roedel | 60e6a7c | 2015-12-21 16:53:17 +0100 | [diff] [blame] | 1737 | dma_mask, boundary_size, |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1738 | align_mask, first); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1739 | if (address != -1) { |
Joerg Roedel | 2a87442 | 2015-12-21 18:34:47 +0100 | [diff] [blame] | 1740 | address = range->offset + (address << PAGE_SHIFT); |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1741 | this_cpu_write(*dom->next_index, index); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1742 | break; |
| 1743 | } |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1744 | } |
| 1745 | |
Joerg Roedel | 7b5e25b | 2015-12-22 13:38:12 +0100 | [diff] [blame] | 1746 | if (address == -1 && first) { |
| 1747 | first = false; |
| 1748 | goto again; |
| 1749 | } |
| 1750 | |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1751 | preempt_enable(); |
| 1752 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1753 | return address; |
| 1754 | } |
| 1755 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1756 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 1757 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1758 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1759 | unsigned long align_mask, |
| 1760 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1761 | { |
Joerg Roedel | 266a3bd | 2015-12-21 18:54:24 +0100 | [diff] [blame] | 1762 | unsigned long address = -1; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1763 | |
Joerg Roedel | 266a3bd | 2015-12-21 18:54:24 +0100 | [diff] [blame] | 1764 | while (address == -1) { |
| 1765 | address = dma_ops_area_alloc(dev, dom, pages, |
| 1766 | align_mask, dma_mask); |
| 1767 | |
Joerg Roedel | 7bfa5bd | 2015-12-21 19:07:50 +0100 | [diff] [blame] | 1768 | if (address == -1 && alloc_new_range(dom, false, GFP_ATOMIC)) |
Joerg Roedel | 266a3bd | 2015-12-21 18:54:24 +0100 | [diff] [blame] | 1769 | break; |
| 1770 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1771 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1772 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1773 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1774 | |
| 1775 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 1776 | |
| 1777 | return address; |
| 1778 | } |
| 1779 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1780 | /* |
| 1781 | * The address free function. |
| 1782 | * |
| 1783 | * called with domain->lock held |
| 1784 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1785 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 1786 | unsigned long address, |
| 1787 | unsigned int pages) |
| 1788 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1789 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 1790 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 08c5fb9 | 2015-12-21 13:04:49 +0100 | [diff] [blame] | 1791 | unsigned long flags; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1792 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1793 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 1794 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 1795 | #ifdef CONFIG_IOMMU_STRESS |
| 1796 | if (i < 4) |
| 1797 | return; |
| 1798 | #endif |
| 1799 | |
Joerg Roedel | 4eeca8c | 2015-12-22 12:15:35 +0100 | [diff] [blame] | 1800 | if (amd_iommu_unmap_flush) { |
Joerg Roedel | d41ab09 | 2015-12-21 18:20:03 +0100 | [diff] [blame] | 1801 | domain_flush_tlb(&dom->domain); |
| 1802 | domain_flush_complete(&dom->domain); |
| 1803 | } |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1804 | |
| 1805 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1806 | |
Joerg Roedel | 08c5fb9 | 2015-12-21 13:04:49 +0100 | [diff] [blame] | 1807 | spin_lock_irqsave(&range->bitmap_lock, flags); |
Joerg Roedel | 4eeca8c | 2015-12-22 12:15:35 +0100 | [diff] [blame] | 1808 | if (address + pages > range->next_bit) |
| 1809 | range->next_bit = address + pages; |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 1810 | bitmap_clear(range->bitmap, address, pages); |
Joerg Roedel | 08c5fb9 | 2015-12-21 13:04:49 +0100 | [diff] [blame] | 1811 | spin_unlock_irqrestore(&range->bitmap_lock, flags); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1812 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1813 | } |
| 1814 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1815 | /**************************************************************************** |
| 1816 | * |
| 1817 | * The next functions belong to the domain allocation. A domain is |
| 1818 | * allocated for every IOMMU as the default domain. If device isolation |
| 1819 | * is enabled, every device get its own domain. The most important thing |
| 1820 | * about domains is the page table mapping the DMA address space they |
| 1821 | * contain. |
| 1822 | * |
| 1823 | ****************************************************************************/ |
| 1824 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1825 | /* |
| 1826 | * This function adds a protection domain to the global protection domain list |
| 1827 | */ |
| 1828 | static void add_domain_to_list(struct protection_domain *domain) |
| 1829 | { |
| 1830 | unsigned long flags; |
| 1831 | |
| 1832 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1833 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1834 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1835 | } |
| 1836 | |
| 1837 | /* |
| 1838 | * This function removes a protection domain to the global |
| 1839 | * protection domain list |
| 1840 | */ |
| 1841 | static void del_domain_from_list(struct protection_domain *domain) |
| 1842 | { |
| 1843 | unsigned long flags; |
| 1844 | |
| 1845 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1846 | list_del(&domain->list); |
| 1847 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1848 | } |
| 1849 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1850 | static u16 domain_id_alloc(void) |
| 1851 | { |
| 1852 | unsigned long flags; |
| 1853 | int id; |
| 1854 | |
| 1855 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1856 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1857 | BUG_ON(id == 0); |
| 1858 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1859 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1860 | else |
| 1861 | id = 0; |
| 1862 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1863 | |
| 1864 | return id; |
| 1865 | } |
| 1866 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1867 | static void domain_id_free(int id) |
| 1868 | { |
| 1869 | unsigned long flags; |
| 1870 | |
| 1871 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1872 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1873 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1874 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1875 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1876 | |
Joerg Roedel | 5c34c40 | 2013-06-20 20:22:58 +0200 | [diff] [blame] | 1877 | #define DEFINE_FREE_PT_FN(LVL, FN) \ |
| 1878 | static void free_pt_##LVL (unsigned long __pt) \ |
| 1879 | { \ |
| 1880 | unsigned long p; \ |
| 1881 | u64 *pt; \ |
| 1882 | int i; \ |
| 1883 | \ |
| 1884 | pt = (u64 *)__pt; \ |
| 1885 | \ |
| 1886 | for (i = 0; i < 512; ++i) { \ |
Joerg Roedel | 0b3fff5 | 2015-06-18 10:48:34 +0200 | [diff] [blame] | 1887 | /* PTE present? */ \ |
Joerg Roedel | 5c34c40 | 2013-06-20 20:22:58 +0200 | [diff] [blame] | 1888 | if (!IOMMU_PTE_PRESENT(pt[i])) \ |
| 1889 | continue; \ |
| 1890 | \ |
Joerg Roedel | 0b3fff5 | 2015-06-18 10:48:34 +0200 | [diff] [blame] | 1891 | /* Large PTE? */ \ |
| 1892 | if (PM_PTE_LEVEL(pt[i]) == 0 || \ |
| 1893 | PM_PTE_LEVEL(pt[i]) == 7) \ |
| 1894 | continue; \ |
| 1895 | \ |
Joerg Roedel | 5c34c40 | 2013-06-20 20:22:58 +0200 | [diff] [blame] | 1896 | p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \ |
| 1897 | FN(p); \ |
| 1898 | } \ |
| 1899 | free_page((unsigned long)pt); \ |
| 1900 | } |
| 1901 | |
| 1902 | DEFINE_FREE_PT_FN(l2, free_page) |
| 1903 | DEFINE_FREE_PT_FN(l3, free_pt_l2) |
| 1904 | DEFINE_FREE_PT_FN(l4, free_pt_l3) |
| 1905 | DEFINE_FREE_PT_FN(l5, free_pt_l4) |
| 1906 | DEFINE_FREE_PT_FN(l6, free_pt_l5) |
| 1907 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1908 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1909 | { |
Joerg Roedel | 5c34c40 | 2013-06-20 20:22:58 +0200 | [diff] [blame] | 1910 | unsigned long root = (unsigned long)domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1911 | |
Joerg Roedel | 5c34c40 | 2013-06-20 20:22:58 +0200 | [diff] [blame] | 1912 | switch (domain->mode) { |
| 1913 | case PAGE_MODE_NONE: |
| 1914 | break; |
| 1915 | case PAGE_MODE_1_LEVEL: |
| 1916 | free_page(root); |
| 1917 | break; |
| 1918 | case PAGE_MODE_2_LEVEL: |
| 1919 | free_pt_l2(root); |
| 1920 | break; |
| 1921 | case PAGE_MODE_3_LEVEL: |
| 1922 | free_pt_l3(root); |
| 1923 | break; |
| 1924 | case PAGE_MODE_4_LEVEL: |
| 1925 | free_pt_l4(root); |
| 1926 | break; |
| 1927 | case PAGE_MODE_5_LEVEL: |
| 1928 | free_pt_l5(root); |
| 1929 | break; |
| 1930 | case PAGE_MODE_6_LEVEL: |
| 1931 | free_pt_l6(root); |
| 1932 | break; |
| 1933 | default: |
| 1934 | BUG(); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1935 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1936 | } |
| 1937 | |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 1938 | static void free_gcr3_tbl_level1(u64 *tbl) |
| 1939 | { |
| 1940 | u64 *ptr; |
| 1941 | int i; |
| 1942 | |
| 1943 | for (i = 0; i < 512; ++i) { |
| 1944 | if (!(tbl[i] & GCR3_VALID)) |
| 1945 | continue; |
| 1946 | |
| 1947 | ptr = __va(tbl[i] & PAGE_MASK); |
| 1948 | |
| 1949 | free_page((unsigned long)ptr); |
| 1950 | } |
| 1951 | } |
| 1952 | |
| 1953 | static void free_gcr3_tbl_level2(u64 *tbl) |
| 1954 | { |
| 1955 | u64 *ptr; |
| 1956 | int i; |
| 1957 | |
| 1958 | for (i = 0; i < 512; ++i) { |
| 1959 | if (!(tbl[i] & GCR3_VALID)) |
| 1960 | continue; |
| 1961 | |
| 1962 | ptr = __va(tbl[i] & PAGE_MASK); |
| 1963 | |
| 1964 | free_gcr3_tbl_level1(ptr); |
| 1965 | } |
| 1966 | } |
| 1967 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1968 | static void free_gcr3_table(struct protection_domain *domain) |
| 1969 | { |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 1970 | if (domain->glx == 2) |
| 1971 | free_gcr3_tbl_level2(domain->gcr3_tbl); |
| 1972 | else if (domain->glx == 1) |
| 1973 | free_gcr3_tbl_level1(domain->gcr3_tbl); |
Joerg Roedel | 23d3a98 | 2015-08-13 11:15:13 +0200 | [diff] [blame] | 1974 | else |
| 1975 | BUG_ON(domain->glx != 0); |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 1976 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1977 | free_page((unsigned long)domain->gcr3_tbl); |
| 1978 | } |
| 1979 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1980 | /* |
| 1981 | * Free a domain, only used if something went wrong in the |
| 1982 | * allocation path and we need to free an already allocated page table |
| 1983 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1984 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1985 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1986 | int i; |
| 1987 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1988 | if (!dom) |
| 1989 | return; |
| 1990 | |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 1991 | put_iova_domain(&dom->iovad); |
| 1992 | |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 1993 | free_percpu(dom->next_index); |
| 1994 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1995 | del_domain_from_list(&dom->domain); |
| 1996 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1997 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1998 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1999 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 2000 | if (!dom->aperture[i]) |
| 2001 | continue; |
| 2002 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 2003 | kfree(dom->aperture[i]); |
| 2004 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2005 | |
| 2006 | kfree(dom); |
| 2007 | } |
| 2008 | |
Joerg Roedel | a639a8e | 2015-12-22 16:06:49 +0100 | [diff] [blame] | 2009 | static int dma_ops_domain_alloc_apertures(struct dma_ops_domain *dma_dom, |
| 2010 | int max_apertures) |
| 2011 | { |
| 2012 | int ret, i, apertures; |
| 2013 | |
| 2014 | apertures = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 2015 | ret = 0; |
| 2016 | |
| 2017 | for (i = apertures; i < max_apertures; ++i) { |
| 2018 | ret = alloc_new_range(dma_dom, false, GFP_KERNEL); |
| 2019 | if (ret) |
| 2020 | break; |
| 2021 | } |
| 2022 | |
| 2023 | return ret; |
| 2024 | } |
| 2025 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2026 | /* |
| 2027 | * Allocates a new protection domain usable for the dma_ops functions. |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 2028 | * It also initializes the page table and the address allocator data |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2029 | * structures required for the dma_ops interface |
| 2030 | */ |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2031 | static struct dma_ops_domain *dma_ops_domain_alloc(void) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2032 | { |
| 2033 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 2034 | int cpu; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2035 | |
| 2036 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 2037 | if (!dma_dom) |
| 2038 | return NULL; |
| 2039 | |
Joerg Roedel | 7a5a566 | 2015-06-30 08:56:11 +0200 | [diff] [blame] | 2040 | if (protection_domain_init(&dma_dom->domain)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2041 | goto free_dma_dom; |
Joerg Roedel | 7a5a566 | 2015-06-30 08:56:11 +0200 | [diff] [blame] | 2042 | |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 2043 | dma_dom->next_index = alloc_percpu(u32); |
| 2044 | if (!dma_dom->next_index) |
| 2045 | goto free_dma_dom; |
| 2046 | |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 2047 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2048 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 2049 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2050 | dma_dom->domain.priv = dma_dom; |
| 2051 | if (!dma_dom->domain.pt_root) |
| 2052 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2053 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2054 | add_domain_to_list(&dma_dom->domain); |
| 2055 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 2056 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2057 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2058 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2059 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2060 | * mark the first page as allocated so we never return 0 as |
| 2061 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2062 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2063 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2064 | |
Joerg Roedel | 5f6bed5 | 2015-12-22 13:34:22 +0100 | [diff] [blame] | 2065 | for_each_possible_cpu(cpu) |
| 2066 | *per_cpu_ptr(dma_dom->next_index, cpu) = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2067 | |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 2068 | init_iova_domain(&dma_dom->iovad, PAGE_SIZE, |
| 2069 | IOVA_START_PFN, DMA_32BIT_PFN); |
| 2070 | |
Joerg Roedel | 81cd07b | 2016-07-07 18:01:10 +0200 | [diff] [blame] | 2071 | /* Initialize reserved ranges */ |
| 2072 | copy_reserved_iova(&reserved_iova_ranges, &dma_dom->iovad); |
| 2073 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 2074 | return dma_dom; |
| 2075 | |
| 2076 | free_dma_dom: |
| 2077 | dma_ops_domain_free(dma_dom); |
| 2078 | |
| 2079 | return NULL; |
| 2080 | } |
| 2081 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2082 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2083 | * little helper function to check whether a given protection domain is a |
| 2084 | * dma_ops domain |
| 2085 | */ |
| 2086 | static bool dma_ops_domain(struct protection_domain *domain) |
| 2087 | { |
| 2088 | return domain->flags & PD_DMA_OPS_MASK; |
| 2089 | } |
| 2090 | |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2091 | static void set_dte_entry(u16 devid, struct protection_domain *domain, bool ats) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2092 | { |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 2093 | u64 pte_root = 0; |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 2094 | u64 flags = 0; |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 2095 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 2096 | if (domain->mode != PAGE_MODE_NONE) |
| 2097 | pte_root = virt_to_phys(domain->pt_root); |
| 2098 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 2099 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 2100 | << DEV_ENTRY_MODE_SHIFT; |
| 2101 | pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2102 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 2103 | flags = amd_iommu_dev_table[devid].data[1]; |
| 2104 | |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2105 | if (ats) |
| 2106 | flags |= DTE_FLAG_IOTLB; |
| 2107 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2108 | if (domain->flags & PD_IOMMUV2_MASK) { |
| 2109 | u64 gcr3 = __pa(domain->gcr3_tbl); |
| 2110 | u64 glx = domain->glx; |
| 2111 | u64 tmp; |
| 2112 | |
| 2113 | pte_root |= DTE_FLAG_GV; |
| 2114 | pte_root |= (glx & DTE_GLX_MASK) << DTE_GLX_SHIFT; |
| 2115 | |
| 2116 | /* First mask out possible old values for GCR3 table */ |
| 2117 | tmp = DTE_GCR3_VAL_B(~0ULL) << DTE_GCR3_SHIFT_B; |
| 2118 | flags &= ~tmp; |
| 2119 | |
| 2120 | tmp = DTE_GCR3_VAL_C(~0ULL) << DTE_GCR3_SHIFT_C; |
| 2121 | flags &= ~tmp; |
| 2122 | |
| 2123 | /* Encode GCR3 table into DTE */ |
| 2124 | tmp = DTE_GCR3_VAL_A(gcr3) << DTE_GCR3_SHIFT_A; |
| 2125 | pte_root |= tmp; |
| 2126 | |
| 2127 | tmp = DTE_GCR3_VAL_B(gcr3) << DTE_GCR3_SHIFT_B; |
| 2128 | flags |= tmp; |
| 2129 | |
| 2130 | tmp = DTE_GCR3_VAL_C(gcr3) << DTE_GCR3_SHIFT_C; |
| 2131 | flags |= tmp; |
| 2132 | } |
| 2133 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 2134 | flags &= ~(0xffffUL); |
| 2135 | flags |= domain->id; |
| 2136 | |
| 2137 | amd_iommu_dev_table[devid].data[1] = flags; |
| 2138 | amd_iommu_dev_table[devid].data[0] = pte_root; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2139 | } |
| 2140 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2141 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2142 | { |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2143 | /* remove entry from the device table seen by the hardware */ |
Joerg Roedel | cbf3ccd | 2015-10-20 14:59:36 +0200 | [diff] [blame] | 2144 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 2145 | amd_iommu_dev_table[devid].data[1] &= DTE_FLAG_MASK; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2146 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 2147 | amd_iommu_apply_erratum_63(devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2148 | } |
| 2149 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2150 | static void do_attach(struct iommu_dev_data *dev_data, |
| 2151 | struct protection_domain *domain) |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2152 | { |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2153 | struct amd_iommu *iommu; |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 2154 | u16 alias; |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2155 | bool ats; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2156 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2157 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 2158 | alias = dev_data->alias; |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2159 | ats = dev_data->ats.enabled; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2160 | |
| 2161 | /* Update data structures */ |
| 2162 | dev_data->domain = domain; |
| 2163 | list_add(&dev_data->list, &domain->dev_list); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2164 | |
| 2165 | /* Do reference counting */ |
| 2166 | domain->dev_iommu[iommu->index] += 1; |
| 2167 | domain->dev_cnt += 1; |
| 2168 | |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 2169 | /* Update device table */ |
| 2170 | set_dte_entry(dev_data->devid, domain, ats); |
| 2171 | if (alias != dev_data->devid) |
Baoquan He | 9b1a12d | 2016-01-20 22:01:19 +0800 | [diff] [blame] | 2172 | set_dte_entry(alias, domain, ats); |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 2173 | |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 2174 | device_flush_dte(dev_data); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2175 | } |
| 2176 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2177 | static void do_detach(struct iommu_dev_data *dev_data) |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2178 | { |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2179 | struct amd_iommu *iommu; |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 2180 | u16 alias; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2181 | |
Joerg Roedel | 5adad99 | 2015-10-09 16:23:33 +0200 | [diff] [blame] | 2182 | /* |
| 2183 | * First check if the device is still attached. It might already |
| 2184 | * be detached from its domain because the generic |
| 2185 | * iommu_detach_group code detached it and we try again here in |
| 2186 | * our alias handling. |
| 2187 | */ |
| 2188 | if (!dev_data->domain) |
| 2189 | return; |
| 2190 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2191 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | e315604 | 2016-04-08 15:12:24 +0200 | [diff] [blame] | 2192 | alias = dev_data->alias; |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 2193 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 2194 | /* decrease reference counters */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2195 | dev_data->domain->dev_iommu[iommu->index] -= 1; |
| 2196 | dev_data->domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2197 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2198 | /* Update data structures */ |
| 2199 | dev_data->domain = NULL; |
| 2200 | list_del(&dev_data->list); |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 2201 | clear_dte_entry(dev_data->devid); |
Joerg Roedel | e25bfb5 | 2015-10-20 17:33:38 +0200 | [diff] [blame] | 2202 | if (alias != dev_data->devid) |
| 2203 | clear_dte_entry(alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2204 | |
| 2205 | /* Flush the DTE entry */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 2206 | device_flush_dte(dev_data); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2207 | } |
| 2208 | |
| 2209 | /* |
| 2210 | * If a device is not yet associated with a domain, this function does |
| 2211 | * assigns it visible for the hardware |
| 2212 | */ |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2213 | static int __attach_device(struct iommu_dev_data *dev_data, |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2214 | struct protection_domain *domain) |
| 2215 | { |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 2216 | int ret; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2217 | |
Joerg Roedel | 272e4f9 | 2015-10-20 17:33:37 +0200 | [diff] [blame] | 2218 | /* |
| 2219 | * Must be called with IRQs disabled. Warn here to detect early |
| 2220 | * when its not. |
| 2221 | */ |
| 2222 | WARN_ON(!irqs_disabled()); |
| 2223 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2224 | /* lock domain */ |
| 2225 | spin_lock(&domain->lock); |
| 2226 | |
Joerg Roedel | 397111a | 2014-08-05 17:31:51 +0200 | [diff] [blame] | 2227 | ret = -EBUSY; |
Joerg Roedel | 150952f | 2015-10-20 17:33:35 +0200 | [diff] [blame] | 2228 | if (dev_data->domain != NULL) |
Joerg Roedel | 397111a | 2014-08-05 17:31:51 +0200 | [diff] [blame] | 2229 | goto out_unlock; |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 2230 | |
Joerg Roedel | 397111a | 2014-08-05 17:31:51 +0200 | [diff] [blame] | 2231 | /* Attach alias group root */ |
Joerg Roedel | 150952f | 2015-10-20 17:33:35 +0200 | [diff] [blame] | 2232 | do_attach(dev_data, domain); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 2233 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 2234 | ret = 0; |
| 2235 | |
| 2236 | out_unlock: |
| 2237 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2238 | /* ready */ |
| 2239 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 2240 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 2241 | return ret; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2242 | } |
| 2243 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2244 | |
| 2245 | static void pdev_iommuv2_disable(struct pci_dev *pdev) |
| 2246 | { |
| 2247 | pci_disable_ats(pdev); |
| 2248 | pci_disable_pri(pdev); |
| 2249 | pci_disable_pasid(pdev); |
| 2250 | } |
| 2251 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2252 | /* FIXME: Change generic reset-function to do the same */ |
| 2253 | static int pri_reset_while_enabled(struct pci_dev *pdev) |
| 2254 | { |
| 2255 | u16 control; |
| 2256 | int pos; |
| 2257 | |
Joerg Roedel | 46277b7 | 2011-12-07 14:34:02 +0100 | [diff] [blame] | 2258 | pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2259 | if (!pos) |
| 2260 | return -EINVAL; |
| 2261 | |
Joerg Roedel | 46277b7 | 2011-12-07 14:34:02 +0100 | [diff] [blame] | 2262 | pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); |
| 2263 | control |= PCI_PRI_CTRL_RESET; |
| 2264 | pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control); |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2265 | |
| 2266 | return 0; |
| 2267 | } |
| 2268 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2269 | static int pdev_iommuv2_enable(struct pci_dev *pdev) |
| 2270 | { |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2271 | bool reset_enable; |
| 2272 | int reqs, ret; |
| 2273 | |
| 2274 | /* FIXME: Hardcode number of outstanding requests for now */ |
| 2275 | reqs = 32; |
| 2276 | if (pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE)) |
| 2277 | reqs = 1; |
| 2278 | reset_enable = pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_ENABLE_RESET); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2279 | |
| 2280 | /* Only allow access to user-accessible pages */ |
| 2281 | ret = pci_enable_pasid(pdev, 0); |
| 2282 | if (ret) |
| 2283 | goto out_err; |
| 2284 | |
| 2285 | /* First reset the PRI state of the device */ |
| 2286 | ret = pci_reset_pri(pdev); |
| 2287 | if (ret) |
| 2288 | goto out_err; |
| 2289 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2290 | /* Enable PRI */ |
| 2291 | ret = pci_enable_pri(pdev, reqs); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2292 | if (ret) |
| 2293 | goto out_err; |
| 2294 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 2295 | if (reset_enable) { |
| 2296 | ret = pri_reset_while_enabled(pdev); |
| 2297 | if (ret) |
| 2298 | goto out_err; |
| 2299 | } |
| 2300 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2301 | ret = pci_enable_ats(pdev, PAGE_SHIFT); |
| 2302 | if (ret) |
| 2303 | goto out_err; |
| 2304 | |
| 2305 | return 0; |
| 2306 | |
| 2307 | out_err: |
| 2308 | pci_disable_pri(pdev); |
| 2309 | pci_disable_pasid(pdev); |
| 2310 | |
| 2311 | return ret; |
| 2312 | } |
| 2313 | |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2314 | /* FIXME: Move this to PCI code */ |
Joerg Roedel | a3b9312 | 2012-04-12 12:49:26 +0200 | [diff] [blame] | 2315 | #define PCI_PRI_TLP_OFF (1 << 15) |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2316 | |
Joerg Roedel | 98f1ad2 | 2012-07-06 13:28:37 +0200 | [diff] [blame] | 2317 | static bool pci_pri_tlp_required(struct pci_dev *pdev) |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2318 | { |
Joerg Roedel | a3b9312 | 2012-04-12 12:49:26 +0200 | [diff] [blame] | 2319 | u16 status; |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2320 | int pos; |
| 2321 | |
Joerg Roedel | 46277b7 | 2011-12-07 14:34:02 +0100 | [diff] [blame] | 2322 | pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2323 | if (!pos) |
| 2324 | return false; |
| 2325 | |
Joerg Roedel | a3b9312 | 2012-04-12 12:49:26 +0200 | [diff] [blame] | 2326 | pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status); |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2327 | |
Joerg Roedel | a3b9312 | 2012-04-12 12:49:26 +0200 | [diff] [blame] | 2328 | return (status & PCI_PRI_TLP_OFF) ? true : false; |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2329 | } |
| 2330 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2331 | /* |
Frank Arnold | df805ab | 2012-08-27 19:21:04 +0200 | [diff] [blame] | 2332 | * If a device is not yet associated with a domain, this function |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2333 | * assigns it visible for the hardware |
| 2334 | */ |
| 2335 | static int attach_device(struct device *dev, |
| 2336 | struct protection_domain *domain) |
| 2337 | { |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 2338 | struct pci_dev *pdev; |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2339 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2340 | unsigned long flags; |
| 2341 | int ret; |
| 2342 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2343 | dev_data = get_dev_data(dev); |
| 2344 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 2345 | if (!dev_is_pci(dev)) |
| 2346 | goto skip_ats_check; |
| 2347 | |
| 2348 | pdev = to_pci_dev(dev); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2349 | if (domain->flags & PD_IOMMUV2_MASK) { |
Joerg Roedel | 02ca202 | 2015-07-28 16:58:49 +0200 | [diff] [blame] | 2350 | if (!dev_data->passthrough) |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2351 | return -EINVAL; |
| 2352 | |
Joerg Roedel | 02ca202 | 2015-07-28 16:58:49 +0200 | [diff] [blame] | 2353 | if (dev_data->iommu_v2) { |
| 2354 | if (pdev_iommuv2_enable(pdev) != 0) |
| 2355 | return -EINVAL; |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2356 | |
Joerg Roedel | 02ca202 | 2015-07-28 16:58:49 +0200 | [diff] [blame] | 2357 | dev_data->ats.enabled = true; |
| 2358 | dev_data->ats.qdep = pci_ats_queue_depth(pdev); |
| 2359 | dev_data->pri_tlp = pci_pri_tlp_required(pdev); |
| 2360 | } |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2361 | } else if (amd_iommu_iotlb_sup && |
| 2362 | pci_enable_ats(pdev, PAGE_SHIFT) == 0) { |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2363 | dev_data->ats.enabled = true; |
| 2364 | dev_data->ats.qdep = pci_ats_queue_depth(pdev); |
| 2365 | } |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2366 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 2367 | skip_ats_check: |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2368 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2369 | ret = __attach_device(dev_data, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2370 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2371 | |
| 2372 | /* |
| 2373 | * We might boot into a crash-kernel here. The crashed kernel |
| 2374 | * left the caches in the IOMMU dirty. So we have to flush |
| 2375 | * here to evict all dirty stuff. |
| 2376 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2377 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2378 | |
| 2379 | return ret; |
| 2380 | } |
| 2381 | |
| 2382 | /* |
| 2383 | * Removes a device from a protection domain (unlocked) |
| 2384 | */ |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2385 | static void __detach_device(struct iommu_dev_data *dev_data) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2386 | { |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 2387 | struct protection_domain *domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2388 | |
Joerg Roedel | 272e4f9 | 2015-10-20 17:33:37 +0200 | [diff] [blame] | 2389 | /* |
| 2390 | * Must be called with IRQs disabled. Warn here to detect early |
| 2391 | * when its not. |
| 2392 | */ |
| 2393 | WARN_ON(!irqs_disabled()); |
| 2394 | |
Joerg Roedel | f34c73f | 2015-10-20 17:33:34 +0200 | [diff] [blame] | 2395 | if (WARN_ON(!dev_data->domain)) |
| 2396 | return; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2397 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 2398 | domain = dev_data->domain; |
| 2399 | |
Joerg Roedel | f1dd0a8 | 2015-10-20 17:33:36 +0200 | [diff] [blame] | 2400 | spin_lock(&domain->lock); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 2401 | |
Joerg Roedel | 150952f | 2015-10-20 17:33:35 +0200 | [diff] [blame] | 2402 | do_detach(dev_data); |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 2403 | |
Joerg Roedel | f1dd0a8 | 2015-10-20 17:33:36 +0200 | [diff] [blame] | 2404 | spin_unlock(&domain->lock); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2405 | } |
| 2406 | |
| 2407 | /* |
| 2408 | * Removes a device from a protection domain (with devtable_lock held) |
| 2409 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2410 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2411 | { |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2412 | struct protection_domain *domain; |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2413 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2414 | unsigned long flags; |
| 2415 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2416 | dev_data = get_dev_data(dev); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2417 | domain = dev_data->domain; |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2418 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2419 | /* lock device table */ |
| 2420 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2421 | __detach_device(dev_data); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2422 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2423 | |
Wan Zongshun | 2bf9a0a | 2016-04-01 09:06:03 -0400 | [diff] [blame] | 2424 | if (!dev_is_pci(dev)) |
| 2425 | return; |
| 2426 | |
Joerg Roedel | 02ca202 | 2015-07-28 16:58:49 +0200 | [diff] [blame] | 2427 | if (domain->flags & PD_IOMMUV2_MASK && dev_data->iommu_v2) |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2428 | pdev_iommuv2_disable(to_pci_dev(dev)); |
| 2429 | else if (dev_data->ats.enabled) |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2430 | pci_disable_ats(to_pci_dev(dev)); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2431 | |
| 2432 | dev_data->ats.enabled = false; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2433 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2434 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2435 | static int amd_iommu_add_device(struct device *dev) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2436 | { |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 2437 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 07ee869 | 2015-05-28 18:41:42 +0200 | [diff] [blame] | 2438 | struct iommu_domain *domain; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2439 | struct amd_iommu *iommu; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 2440 | int ret, devid; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2441 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2442 | if (!check_device(dev) || get_dev_data(dev)) |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2443 | return 0; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2444 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2445 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 2446 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 2447 | return devid; |
| 2448 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2449 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2450 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2451 | ret = iommu_init_device(dev); |
Joerg Roedel | 4d58b8a | 2015-06-11 09:21:39 +0200 | [diff] [blame] | 2452 | if (ret) { |
| 2453 | if (ret != -ENOTSUPP) |
| 2454 | pr_err("Failed to initialize device %s - trying to proceed anyway\n", |
| 2455 | dev_name(dev)); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2456 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2457 | iommu_ignore_device(dev); |
Joerg Roedel | 343e9ca | 2015-05-28 18:41:43 +0200 | [diff] [blame] | 2458 | dev->archdata.dma_ops = &nommu_dma_ops; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2459 | goto out; |
| 2460 | } |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2461 | init_iommu_group(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2462 | |
Joerg Roedel | 07ee869 | 2015-05-28 18:41:42 +0200 | [diff] [blame] | 2463 | dev_data = get_dev_data(dev); |
Joerg Roedel | 4d58b8a | 2015-06-11 09:21:39 +0200 | [diff] [blame] | 2464 | |
| 2465 | BUG_ON(!dev_data); |
| 2466 | |
Joerg Roedel | 1e6a7b0 | 2015-07-28 16:58:48 +0200 | [diff] [blame] | 2467 | if (iommu_pass_through || dev_data->iommu_v2) |
Joerg Roedel | 07ee869 | 2015-05-28 18:41:42 +0200 | [diff] [blame] | 2468 | iommu_request_dm_for_dev(dev); |
| 2469 | |
| 2470 | /* Domains are initialized for this device - have a look what we ended up with */ |
| 2471 | domain = iommu_get_domain_for_dev(dev); |
Joerg Roedel | 3230232 | 2015-07-28 16:58:50 +0200 | [diff] [blame] | 2472 | if (domain->type == IOMMU_DOMAIN_IDENTITY) |
Joerg Roedel | 07ee869 | 2015-05-28 18:41:42 +0200 | [diff] [blame] | 2473 | dev_data->passthrough = true; |
Joerg Roedel | 3230232 | 2015-07-28 16:58:50 +0200 | [diff] [blame] | 2474 | else |
Joerg Roedel | 07ee869 | 2015-05-28 18:41:42 +0200 | [diff] [blame] | 2475 | dev->archdata.dma_ops = &amd_iommu_dma_ops; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2476 | |
| 2477 | out: |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2478 | iommu_completion_wait(iommu); |
| 2479 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2480 | return 0; |
| 2481 | } |
| 2482 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2483 | static void amd_iommu_remove_device(struct device *dev) |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 2484 | { |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2485 | struct amd_iommu *iommu; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 2486 | int devid; |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2487 | |
| 2488 | if (!check_device(dev)) |
| 2489 | return; |
| 2490 | |
| 2491 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 2492 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 2493 | return; |
| 2494 | |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 2495 | iommu = amd_iommu_rlookup_table[devid]; |
| 2496 | |
| 2497 | iommu_uninit_device(dev); |
| 2498 | iommu_completion_wait(iommu); |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 2499 | } |
| 2500 | |
Wan Zongshun | b097d11 | 2016-04-01 09:06:04 -0400 | [diff] [blame] | 2501 | static struct iommu_group *amd_iommu_device_group(struct device *dev) |
| 2502 | { |
| 2503 | if (dev_is_pci(dev)) |
| 2504 | return pci_device_group(dev); |
| 2505 | |
| 2506 | return acpihid_device_group(dev); |
| 2507 | } |
| 2508 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2509 | /***************************************************************************** |
| 2510 | * |
| 2511 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 2512 | * |
| 2513 | *****************************************************************************/ |
| 2514 | |
| 2515 | /* |
| 2516 | * In the dma_ops path we only have the struct device. This function |
| 2517 | * finds the corresponding IOMMU, the protection domain and the |
| 2518 | * requestor id for a given device. |
| 2519 | * If the device is not yet associated with a domain this is also done |
| 2520 | * in this function. |
| 2521 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2522 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2523 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2524 | struct protection_domain *domain; |
Joerg Roedel | 063071d | 2015-05-28 18:41:38 +0200 | [diff] [blame] | 2525 | struct iommu_domain *io_domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2526 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2527 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2528 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2529 | |
Joerg Roedel | 063071d | 2015-05-28 18:41:38 +0200 | [diff] [blame] | 2530 | io_domain = iommu_get_domain_for_dev(dev); |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 2531 | if (!io_domain) |
| 2532 | return NULL; |
Joerg Roedel | 063071d | 2015-05-28 18:41:38 +0200 | [diff] [blame] | 2533 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 2534 | domain = to_pdomain(io_domain); |
| 2535 | if (!dma_ops_domain(domain)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2536 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2537 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 2538 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2539 | } |
| 2540 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2541 | static void update_device_table(struct protection_domain *domain) |
| 2542 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2543 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2544 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2545 | list_for_each_entry(dev_data, &domain->dev_list, list) |
| 2546 | set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2547 | } |
| 2548 | |
| 2549 | static void update_domain(struct protection_domain *domain) |
| 2550 | { |
| 2551 | if (!domain->updated) |
| 2552 | return; |
| 2553 | |
| 2554 | update_device_table(domain); |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2555 | |
| 2556 | domain_flush_devices(domain); |
| 2557 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2558 | |
| 2559 | domain->updated = false; |
| 2560 | } |
| 2561 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2562 | /* |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2563 | * This function fetches the PTE for a given address in the aperture |
| 2564 | */ |
| 2565 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 2566 | unsigned long address) |
| 2567 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2568 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2569 | u64 *pte, *pte_page; |
| 2570 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2571 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 2572 | if (!aperture) |
| 2573 | return NULL; |
| 2574 | |
| 2575 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2576 | if (!pte) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 2577 | pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 2578 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2579 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 2580 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 2581 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2582 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2583 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2584 | |
| 2585 | return pte; |
| 2586 | } |
| 2587 | |
| 2588 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2589 | * This is the generic map function. It maps one 4kb page at paddr to |
| 2590 | * the given address in the DMA address space for the domain. |
| 2591 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2592 | static dma_addr_t dma_ops_domain_map(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2593 | unsigned long address, |
| 2594 | phys_addr_t paddr, |
| 2595 | int direction) |
| 2596 | { |
| 2597 | u64 *pte, __pte; |
| 2598 | |
| 2599 | WARN_ON(address > dom->aperture_size); |
| 2600 | |
| 2601 | paddr &= PAGE_MASK; |
| 2602 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2603 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2604 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2605 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2606 | |
| 2607 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 2608 | |
| 2609 | if (direction == DMA_TO_DEVICE) |
| 2610 | __pte |= IOMMU_PTE_IR; |
| 2611 | else if (direction == DMA_FROM_DEVICE) |
| 2612 | __pte |= IOMMU_PTE_IW; |
| 2613 | else if (direction == DMA_BIDIRECTIONAL) |
| 2614 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 2615 | |
Joerg Roedel | a7fb668 | 2015-12-21 12:50:54 +0100 | [diff] [blame] | 2616 | WARN_ON_ONCE(*pte); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2617 | |
| 2618 | *pte = __pte; |
| 2619 | |
| 2620 | return (dma_addr_t)address; |
| 2621 | } |
| 2622 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2623 | /* |
| 2624 | * The generic unmapping function for on page in the DMA address space. |
| 2625 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2626 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2627 | unsigned long address) |
| 2628 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2629 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2630 | u64 *pte; |
| 2631 | |
| 2632 | if (address >= dom->aperture_size) |
| 2633 | return; |
| 2634 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2635 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 2636 | if (!aperture) |
| 2637 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2638 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2639 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 2640 | if (!pte) |
| 2641 | return; |
| 2642 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 2643 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2644 | |
Joerg Roedel | a7fb668 | 2015-12-21 12:50:54 +0100 | [diff] [blame] | 2645 | WARN_ON_ONCE(!*pte); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2646 | |
| 2647 | *pte = 0ULL; |
| 2648 | } |
| 2649 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2650 | /* |
| 2651 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 2652 | * contiguous memory region into DMA address space. It is used by all |
| 2653 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2654 | * Must be called with the domain lock held. |
| 2655 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2656 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2657 | struct dma_ops_domain *dma_dom, |
| 2658 | phys_addr_t paddr, |
| 2659 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2660 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2661 | bool align, |
| 2662 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2663 | { |
| 2664 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2665 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2666 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2667 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2668 | int i; |
| 2669 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 2670 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2671 | paddr &= PAGE_MASK; |
| 2672 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2673 | if (align) |
| 2674 | align_mask = (1UL << get_order(size)) - 1; |
| 2675 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2676 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 2677 | dma_mask); |
Joerg Roedel | ebaecb4 | 2015-12-21 18:11:32 +0100 | [diff] [blame] | 2678 | |
Joerg Roedel | 266a3bd | 2015-12-21 18:54:24 +0100 | [diff] [blame] | 2679 | if (address == DMA_ERROR_CODE) |
| 2680 | goto out; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2681 | |
| 2682 | start = address; |
| 2683 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2684 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2685 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2686 | goto out_unmap; |
| 2687 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2688 | paddr += PAGE_SIZE; |
| 2689 | start += PAGE_SIZE; |
| 2690 | } |
| 2691 | address += offset; |
| 2692 | |
Joerg Roedel | ab7032b | 2015-12-21 18:47:11 +0100 | [diff] [blame] | 2693 | if (unlikely(amd_iommu_np_cache)) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2694 | domain_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | ab7032b | 2015-12-21 18:47:11 +0100 | [diff] [blame] | 2695 | domain_flush_complete(&dma_dom->domain); |
| 2696 | } |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 2697 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2698 | out: |
| 2699 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2700 | |
| 2701 | out_unmap: |
| 2702 | |
| 2703 | for (--i; i >= 0; --i) { |
| 2704 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2705 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2706 | } |
| 2707 | |
| 2708 | dma_ops_free_addresses(dma_dom, address, pages); |
| 2709 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2710 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2711 | } |
| 2712 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2713 | /* |
| 2714 | * Does the reverse of the __map_single function. Must be called with |
| 2715 | * the domain lock held too |
| 2716 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2717 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2718 | dma_addr_t dma_addr, |
| 2719 | size_t size, |
| 2720 | int dir) |
| 2721 | { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 2722 | dma_addr_t flush_addr; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2723 | dma_addr_t i, start; |
| 2724 | unsigned int pages; |
| 2725 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2726 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 2727 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2728 | return; |
| 2729 | |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 2730 | flush_addr = dma_addr; |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 2731 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2732 | dma_addr &= PAGE_MASK; |
| 2733 | start = dma_addr; |
| 2734 | |
| 2735 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2736 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2737 | start += PAGE_SIZE; |
| 2738 | } |
| 2739 | |
Joerg Roedel | 84b3a0b | 2015-12-21 13:23:59 +0100 | [diff] [blame] | 2740 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2741 | } |
| 2742 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2743 | /* |
| 2744 | * The exported map_single function for dma_ops. |
| 2745 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2746 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 2747 | unsigned long offset, size_t size, |
| 2748 | enum dma_data_direction dir, |
| 2749 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2750 | { |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2751 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 2752 | struct protection_domain *domain; |
| 2753 | u64 dma_mask; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2754 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2755 | domain = get_domain(dev); |
| 2756 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2757 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2758 | else if (IS_ERR(domain)) |
| 2759 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2760 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2761 | dma_mask = *dev->dma_mask; |
| 2762 | |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 2763 | return __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2764 | dma_mask); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2765 | } |
| 2766 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2767 | /* |
| 2768 | * The exported unmap_single function for dma_ops. |
| 2769 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2770 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 2771 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2772 | { |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2773 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2774 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2775 | domain = get_domain(dev); |
| 2776 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2777 | return; |
| 2778 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2779 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2780 | } |
| 2781 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2782 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2783 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2784 | * lists). |
| 2785 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2786 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2787 | int nelems, enum dma_data_direction dir, |
| 2788 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2789 | { |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2790 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2791 | int i; |
| 2792 | struct scatterlist *s; |
| 2793 | phys_addr_t paddr; |
| 2794 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2795 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2796 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2797 | domain = get_domain(dev); |
Joerg Roedel | a0e191b | 2013-04-09 15:04:36 +0200 | [diff] [blame] | 2798 | if (IS_ERR(domain)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2799 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2800 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2801 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2802 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2803 | for_each_sg(sglist, s, nelems, i) { |
| 2804 | paddr = sg_phys(s); |
| 2805 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2806 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2807 | paddr, s->length, dir, false, |
| 2808 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2809 | |
| 2810 | if (s->dma_address) { |
| 2811 | s->dma_length = s->length; |
| 2812 | mapped_elems++; |
| 2813 | } else |
| 2814 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2815 | } |
| 2816 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2817 | return mapped_elems; |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 2818 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2819 | unmap: |
| 2820 | for_each_sg(sglist, s, mapped_elems, i) { |
| 2821 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2822 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2823 | s->dma_length, dir); |
| 2824 | s->dma_address = s->dma_length = 0; |
| 2825 | } |
| 2826 | |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 2827 | return 0; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2828 | } |
| 2829 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2830 | /* |
| 2831 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2832 | * lists). |
| 2833 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2834 | static void unmap_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2835 | int nelems, enum dma_data_direction dir, |
| 2836 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2837 | { |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2838 | struct protection_domain *domain; |
| 2839 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2840 | int i; |
| 2841 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2842 | domain = get_domain(dev); |
| 2843 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2844 | return; |
| 2845 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2846 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2847 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2848 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2849 | s->dma_address = s->dma_length = 0; |
| 2850 | } |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2851 | } |
| 2852 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2853 | /* |
| 2854 | * The exported alloc_coherent function for dma_ops. |
| 2855 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2856 | static void *alloc_coherent(struct device *dev, size_t size, |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 2857 | dma_addr_t *dma_addr, gfp_t flag, |
| 2858 | struct dma_attrs *attrs) |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2859 | { |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2860 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2861 | struct protection_domain *domain; |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2862 | struct page *page; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2863 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2864 | domain = get_domain(dev); |
| 2865 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2866 | page = alloc_pages(flag, get_order(size)); |
| 2867 | *dma_addr = page_to_phys(page); |
| 2868 | return page_address(page); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2869 | } else if (IS_ERR(domain)) |
| 2870 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2871 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2872 | size = PAGE_ALIGN(size); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2873 | dma_mask = dev->coherent_dma_mask; |
| 2874 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
Joerg Roedel | 2d0ec7a | 2015-06-01 17:30:57 +0200 | [diff] [blame] | 2875 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2876 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2877 | page = alloc_pages(flag | __GFP_NOWARN, get_order(size)); |
| 2878 | if (!page) { |
Mel Gorman | d0164ad | 2015-11-06 16:28:21 -0800 | [diff] [blame] | 2879 | if (!gfpflags_allow_blocking(flag)) |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2880 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2881 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2882 | page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT, |
| 2883 | get_order(size)); |
| 2884 | if (!page) |
| 2885 | return NULL; |
| 2886 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2887 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2888 | if (!dma_mask) |
| 2889 | dma_mask = *dev->dma_mask; |
| 2890 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2891 | *dma_addr = __map_single(dev, domain->priv, page_to_phys(page), |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2892 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2893 | |
Joerg Roedel | 92d420e | 2015-12-21 19:31:33 +0100 | [diff] [blame] | 2894 | if (*dma_addr == DMA_ERROR_CODE) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2895 | goto out_free; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2896 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2897 | return page_address(page); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2898 | |
| 2899 | out_free: |
| 2900 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2901 | if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) |
| 2902 | __free_pages(page, get_order(size)); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2903 | |
| 2904 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2905 | } |
| 2906 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2907 | /* |
| 2908 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2909 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2910 | static void free_coherent(struct device *dev, size_t size, |
Andrzej Pietrasiewicz | baa676f | 2012-03-27 14:28:18 +0200 | [diff] [blame] | 2911 | void *virt_addr, dma_addr_t dma_addr, |
| 2912 | struct dma_attrs *attrs) |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2913 | { |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2914 | struct protection_domain *domain; |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2915 | struct page *page; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2916 | |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2917 | page = virt_to_page(virt_addr); |
| 2918 | size = PAGE_ALIGN(size); |
| 2919 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2920 | domain = get_domain(dev); |
| 2921 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2922 | goto free_mem; |
| 2923 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2924 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2925 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2926 | free_mem: |
Joerg Roedel | 3b839a5 | 2015-04-01 14:58:47 +0200 | [diff] [blame] | 2927 | if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) |
| 2928 | __free_pages(page, get_order(size)); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2929 | } |
| 2930 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2931 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2932 | * This function is called by the DMA layer to find out if we can handle a |
| 2933 | * particular device. It is part of the dma_ops. |
| 2934 | */ |
| 2935 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2936 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2937 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2938 | } |
| 2939 | |
Joerg Roedel | a639a8e | 2015-12-22 16:06:49 +0100 | [diff] [blame] | 2940 | static int set_dma_mask(struct device *dev, u64 mask) |
| 2941 | { |
| 2942 | struct protection_domain *domain; |
| 2943 | int max_apertures = 1; |
| 2944 | |
| 2945 | domain = get_domain(dev); |
| 2946 | if (IS_ERR(domain)) |
| 2947 | return PTR_ERR(domain); |
| 2948 | |
| 2949 | if (mask == DMA_BIT_MASK(64)) |
| 2950 | max_apertures = 8; |
| 2951 | else if (mask > DMA_BIT_MASK(32)) |
| 2952 | max_apertures = 4; |
| 2953 | |
| 2954 | /* |
| 2955 | * To prevent lock contention it doesn't make sense to allocate more |
| 2956 | * apertures than online cpus |
| 2957 | */ |
| 2958 | if (max_apertures > num_online_cpus()) |
| 2959 | max_apertures = num_online_cpus(); |
| 2960 | |
| 2961 | if (dma_ops_domain_alloc_apertures(domain->priv, max_apertures)) |
| 2962 | dev_err(dev, "Can't allocate %d iommu apertures\n", |
| 2963 | max_apertures); |
| 2964 | |
| 2965 | return 0; |
| 2966 | } |
| 2967 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2968 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | a639a8e | 2015-12-22 16:06:49 +0100 | [diff] [blame] | 2969 | .alloc = alloc_coherent, |
| 2970 | .free = free_coherent, |
| 2971 | .map_page = map_page, |
| 2972 | .unmap_page = unmap_page, |
| 2973 | .map_sg = map_sg, |
| 2974 | .unmap_sg = unmap_sg, |
| 2975 | .dma_supported = amd_iommu_dma_supported, |
| 2976 | .set_dma_mask = set_dma_mask, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2977 | }; |
| 2978 | |
Joerg Roedel | 81cd07b | 2016-07-07 18:01:10 +0200 | [diff] [blame] | 2979 | static int init_reserved_iova_ranges(void) |
| 2980 | { |
| 2981 | struct pci_dev *pdev = NULL; |
| 2982 | struct iova *val; |
| 2983 | |
| 2984 | init_iova_domain(&reserved_iova_ranges, PAGE_SIZE, |
| 2985 | IOVA_START_PFN, DMA_32BIT_PFN); |
| 2986 | |
| 2987 | lockdep_set_class(&reserved_iova_ranges.iova_rbtree_lock, |
| 2988 | &reserved_rbtree_key); |
| 2989 | |
| 2990 | /* MSI memory range */ |
| 2991 | val = reserve_iova(&reserved_iova_ranges, |
| 2992 | IOVA_PFN(MSI_RANGE_START), IOVA_PFN(MSI_RANGE_END)); |
| 2993 | if (!val) { |
| 2994 | pr_err("Reserving MSI range failed\n"); |
| 2995 | return -ENOMEM; |
| 2996 | } |
| 2997 | |
| 2998 | /* HT memory range */ |
| 2999 | val = reserve_iova(&reserved_iova_ranges, |
| 3000 | IOVA_PFN(HT_RANGE_START), IOVA_PFN(HT_RANGE_END)); |
| 3001 | if (!val) { |
| 3002 | pr_err("Reserving HT range failed\n"); |
| 3003 | return -ENOMEM; |
| 3004 | } |
| 3005 | |
| 3006 | /* |
| 3007 | * Memory used for PCI resources |
| 3008 | * FIXME: Check whether we can reserve the PCI-hole completly |
| 3009 | */ |
| 3010 | for_each_pci_dev(pdev) { |
| 3011 | int i; |
| 3012 | |
| 3013 | for (i = 0; i < PCI_NUM_RESOURCES; ++i) { |
| 3014 | struct resource *r = &pdev->resource[i]; |
| 3015 | |
| 3016 | if (!(r->flags & IORESOURCE_MEM)) |
| 3017 | continue; |
| 3018 | |
| 3019 | val = reserve_iova(&reserved_iova_ranges, |
| 3020 | IOVA_PFN(r->start), |
| 3021 | IOVA_PFN(r->end)); |
| 3022 | if (!val) { |
| 3023 | pr_err("Reserve pci-resource range failed\n"); |
| 3024 | return -ENOMEM; |
| 3025 | } |
| 3026 | } |
| 3027 | } |
| 3028 | |
| 3029 | return 0; |
| 3030 | } |
| 3031 | |
Joerg Roedel | 3a18404c | 2015-05-28 18:41:45 +0200 | [diff] [blame] | 3032 | int __init amd_iommu_init_api(void) |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 3033 | { |
Joerg Roedel | 307d585 | 2016-07-05 11:54:04 +0200 | [diff] [blame] | 3034 | int ret, err = 0; |
| 3035 | |
| 3036 | ret = iova_cache_get(); |
| 3037 | if (ret) |
| 3038 | return ret; |
Wan Zongshun | 9a4d3bf5 | 2016-04-01 09:06:05 -0400 | [diff] [blame] | 3039 | |
Joerg Roedel | 81cd07b | 2016-07-07 18:01:10 +0200 | [diff] [blame] | 3040 | ret = init_reserved_iova_ranges(); |
| 3041 | if (ret) |
| 3042 | return ret; |
| 3043 | |
Wan Zongshun | 9a4d3bf5 | 2016-04-01 09:06:05 -0400 | [diff] [blame] | 3044 | err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops); |
| 3045 | if (err) |
| 3046 | return err; |
| 3047 | #ifdef CONFIG_ARM_AMBA |
| 3048 | err = bus_set_iommu(&amba_bustype, &amd_iommu_ops); |
| 3049 | if (err) |
| 3050 | return err; |
| 3051 | #endif |
Wan Zongshun | 0076cd3 | 2016-05-10 09:21:01 -0400 | [diff] [blame] | 3052 | err = bus_set_iommu(&platform_bus_type, &amd_iommu_ops); |
| 3053 | if (err) |
| 3054 | return err; |
Wan Zongshun | 9a4d3bf5 | 2016-04-01 09:06:05 -0400 | [diff] [blame] | 3055 | return 0; |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 3056 | } |
| 3057 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 3058 | int __init amd_iommu_init_dma_ops(void) |
| 3059 | { |
Joerg Roedel | 3230232 | 2015-07-28 16:58:50 +0200 | [diff] [blame] | 3060 | swiotlb = iommu_pass_through ? 1 : 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 3061 | iommu_detected = 1; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 3062 | |
Joerg Roedel | 5271782 | 2015-07-28 16:58:51 +0200 | [diff] [blame] | 3063 | /* |
| 3064 | * In case we don't initialize SWIOTLB (actually the common case |
| 3065 | * when AMD IOMMU is enabled), make sure there are global |
| 3066 | * dma_ops set as a fall-back for devices not handled by this |
| 3067 | * driver (for example non-PCI devices). |
| 3068 | */ |
| 3069 | if (!swiotlb) |
| 3070 | dma_ops = &nommu_dma_ops; |
| 3071 | |
Joerg Roedel | 62410ee | 2012-06-12 16:42:43 +0200 | [diff] [blame] | 3072 | if (amd_iommu_unmap_flush) |
| 3073 | pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n"); |
| 3074 | else |
| 3075 | pr_info("AMD-Vi: Lazy IO/TLB flushing enabled\n"); |
| 3076 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 3077 | return 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 3078 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 3079 | |
| 3080 | /***************************************************************************** |
| 3081 | * |
| 3082 | * The following functions belong to the exported interface of AMD IOMMU |
| 3083 | * |
| 3084 | * This interface allows access to lower level functions of the IOMMU |
| 3085 | * like protection domain handling and assignement of devices to domains |
| 3086 | * which is not possible with the dma_ops interface. |
| 3087 | * |
| 3088 | *****************************************************************************/ |
| 3089 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 3090 | static void cleanup_domain(struct protection_domain *domain) |
| 3091 | { |
Joerg Roedel | 9b29d3c | 2014-08-05 17:50:15 +0200 | [diff] [blame] | 3092 | struct iommu_dev_data *entry; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 3093 | unsigned long flags; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 3094 | |
| 3095 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 3096 | |
Joerg Roedel | 9b29d3c | 2014-08-05 17:50:15 +0200 | [diff] [blame] | 3097 | while (!list_empty(&domain->dev_list)) { |
| 3098 | entry = list_first_entry(&domain->dev_list, |
| 3099 | struct iommu_dev_data, list); |
| 3100 | __detach_device(entry); |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 3101 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 3102 | |
| 3103 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 3104 | } |
| 3105 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3106 | static void protection_domain_free(struct protection_domain *domain) |
| 3107 | { |
| 3108 | if (!domain) |
| 3109 | return; |
| 3110 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 3111 | del_domain_from_list(domain); |
| 3112 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3113 | if (domain->id) |
| 3114 | domain_id_free(domain->id); |
| 3115 | |
| 3116 | kfree(domain); |
| 3117 | } |
| 3118 | |
Joerg Roedel | 7a5a566 | 2015-06-30 08:56:11 +0200 | [diff] [blame] | 3119 | static int protection_domain_init(struct protection_domain *domain) |
| 3120 | { |
| 3121 | spin_lock_init(&domain->lock); |
| 3122 | mutex_init(&domain->api_lock); |
| 3123 | domain->id = domain_id_alloc(); |
| 3124 | if (!domain->id) |
| 3125 | return -ENOMEM; |
| 3126 | INIT_LIST_HEAD(&domain->dev_list); |
| 3127 | |
| 3128 | return 0; |
| 3129 | } |
| 3130 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3131 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 3132 | { |
| 3133 | struct protection_domain *domain; |
| 3134 | |
| 3135 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 3136 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3137 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 3138 | |
Joerg Roedel | 7a5a566 | 2015-06-30 08:56:11 +0200 | [diff] [blame] | 3139 | if (protection_domain_init(domain)) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3140 | goto out_err; |
| 3141 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 3142 | add_domain_to_list(domain); |
| 3143 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3144 | return domain; |
| 3145 | |
| 3146 | out_err: |
| 3147 | kfree(domain); |
| 3148 | |
| 3149 | return NULL; |
| 3150 | } |
| 3151 | |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3152 | static struct iommu_domain *amd_iommu_domain_alloc(unsigned type) |
| 3153 | { |
| 3154 | struct protection_domain *pdomain; |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 3155 | struct dma_ops_domain *dma_domain; |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3156 | |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 3157 | switch (type) { |
| 3158 | case IOMMU_DOMAIN_UNMANAGED: |
| 3159 | pdomain = protection_domain_alloc(); |
| 3160 | if (!pdomain) |
| 3161 | return NULL; |
| 3162 | |
| 3163 | pdomain->mode = PAGE_MODE_3_LEVEL; |
| 3164 | pdomain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 3165 | if (!pdomain->pt_root) { |
| 3166 | protection_domain_free(pdomain); |
| 3167 | return NULL; |
| 3168 | } |
| 3169 | |
| 3170 | pdomain->domain.geometry.aperture_start = 0; |
| 3171 | pdomain->domain.geometry.aperture_end = ~0ULL; |
| 3172 | pdomain->domain.geometry.force_aperture = true; |
| 3173 | |
| 3174 | break; |
| 3175 | case IOMMU_DOMAIN_DMA: |
| 3176 | dma_domain = dma_ops_domain_alloc(); |
| 3177 | if (!dma_domain) { |
| 3178 | pr_err("AMD-Vi: Failed to allocate\n"); |
| 3179 | return NULL; |
| 3180 | } |
| 3181 | pdomain = &dma_domain->domain; |
| 3182 | break; |
Joerg Roedel | 07f643a | 2015-05-28 18:41:41 +0200 | [diff] [blame] | 3183 | case IOMMU_DOMAIN_IDENTITY: |
| 3184 | pdomain = protection_domain_alloc(); |
| 3185 | if (!pdomain) |
| 3186 | return NULL; |
| 3187 | |
| 3188 | pdomain->mode = PAGE_MODE_NONE; |
| 3189 | break; |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 3190 | default: |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3191 | return NULL; |
Joerg Roedel | 0bb6e24 | 2015-05-28 18:41:40 +0200 | [diff] [blame] | 3192 | } |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3193 | |
| 3194 | return &pdomain->domain; |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3195 | } |
| 3196 | |
| 3197 | static void amd_iommu_domain_free(struct iommu_domain *dom) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3198 | { |
| 3199 | struct protection_domain *domain; |
| 3200 | |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3201 | if (!dom) |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3202 | return; |
| 3203 | |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3204 | domain = to_pdomain(dom); |
| 3205 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3206 | if (domain->dev_cnt > 0) |
| 3207 | cleanup_domain(domain); |
| 3208 | |
| 3209 | BUG_ON(domain->dev_cnt != 0); |
| 3210 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3211 | if (domain->mode != PAGE_MODE_NONE) |
| 3212 | free_pagetable(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3213 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 3214 | if (domain->flags & PD_IOMMUV2_MASK) |
| 3215 | free_gcr3_table(domain); |
| 3216 | |
Joerg Roedel | 8b408fe | 2010-03-08 14:20:07 +0100 | [diff] [blame] | 3217 | protection_domain_free(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3218 | } |
| 3219 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3220 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 3221 | struct device *dev) |
| 3222 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3223 | struct iommu_dev_data *dev_data = dev->archdata.iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3224 | struct amd_iommu *iommu; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 3225 | int devid; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3226 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3227 | if (!check_device(dev)) |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3228 | return; |
| 3229 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3230 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 3231 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 3232 | return; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3233 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3234 | if (dev_data->domain != NULL) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3235 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3236 | |
| 3237 | iommu = amd_iommu_rlookup_table[devid]; |
| 3238 | if (!iommu) |
| 3239 | return; |
| 3240 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3241 | iommu_completion_wait(iommu); |
| 3242 | } |
| 3243 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3244 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 3245 | struct device *dev) |
| 3246 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3247 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3248 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3249 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3250 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3251 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3252 | if (!check_device(dev)) |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3253 | return -EINVAL; |
| 3254 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3255 | dev_data = dev->archdata.iommu; |
| 3256 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 3257 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3258 | if (!iommu) |
| 3259 | return -EINVAL; |
| 3260 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3261 | if (dev_data->domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3262 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3263 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3264 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3265 | |
| 3266 | iommu_completion_wait(iommu); |
| 3267 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3268 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3269 | } |
| 3270 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3271 | static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova, |
Ohad Ben-Cohen | 5009065 | 2011-11-10 11:32:25 +0200 | [diff] [blame] | 3272 | phys_addr_t paddr, size_t page_size, int iommu_prot) |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3273 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3274 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3275 | int prot = 0; |
| 3276 | int ret; |
| 3277 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3278 | if (domain->mode == PAGE_MODE_NONE) |
| 3279 | return -EINVAL; |
| 3280 | |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3281 | if (iommu_prot & IOMMU_READ) |
| 3282 | prot |= IOMMU_PROT_IR; |
| 3283 | if (iommu_prot & IOMMU_WRITE) |
| 3284 | prot |= IOMMU_PROT_IW; |
| 3285 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3286 | mutex_lock(&domain->api_lock); |
Joerg Roedel | b911b89 | 2016-07-05 14:29:11 +0200 | [diff] [blame^] | 3287 | ret = iommu_map_page(domain, iova, paddr, page_size, prot, GFP_KERNEL); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3288 | mutex_unlock(&domain->api_lock); |
| 3289 | |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 3290 | return ret; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3291 | } |
| 3292 | |
Ohad Ben-Cohen | 5009065 | 2011-11-10 11:32:25 +0200 | [diff] [blame] | 3293 | static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, |
| 3294 | size_t page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3295 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3296 | struct protection_domain *domain = to_pdomain(dom); |
Ohad Ben-Cohen | 5009065 | 2011-11-10 11:32:25 +0200 | [diff] [blame] | 3297 | size_t unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3298 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3299 | if (domain->mode == PAGE_MODE_NONE) |
| 3300 | return -EINVAL; |
| 3301 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3302 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3303 | unmap_size = iommu_unmap_page(domain, iova, page_size); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 3304 | mutex_unlock(&domain->api_lock); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3305 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 3306 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3307 | |
Ohad Ben-Cohen | 5009065 | 2011-11-10 11:32:25 +0200 | [diff] [blame] | 3308 | return unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3309 | } |
| 3310 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3311 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
Varun Sethi | bb5547a | 2013-03-29 01:23:58 +0530 | [diff] [blame] | 3312 | dma_addr_t iova) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3313 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3314 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 3315 | unsigned long offset_mask, pte_pgsize; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 3316 | u64 *pte, __pte; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3317 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3318 | if (domain->mode == PAGE_MODE_NONE) |
| 3319 | return iova; |
| 3320 | |
Joerg Roedel | 3039ca1 | 2015-04-01 14:58:48 +0200 | [diff] [blame] | 3321 | pte = fetch_pte(domain, iova, &pte_pgsize); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3322 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 3323 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3324 | return 0; |
| 3325 | |
Joerg Roedel | b24b1b6 | 2015-04-01 14:58:51 +0200 | [diff] [blame] | 3326 | offset_mask = pte_pgsize - 1; |
| 3327 | __pte = *pte & PM_ADDR_MASK; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 3328 | |
Joerg Roedel | b24b1b6 | 2015-04-01 14:58:51 +0200 | [diff] [blame] | 3329 | return (__pte & ~offset_mask) | (iova & offset_mask); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3330 | } |
| 3331 | |
Joerg Roedel | ab63648 | 2014-09-05 10:48:21 +0200 | [diff] [blame] | 3332 | static bool amd_iommu_capable(enum iommu_cap cap) |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 3333 | { |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 3334 | switch (cap) { |
| 3335 | case IOMMU_CAP_CACHE_COHERENCY: |
Joerg Roedel | ab63648 | 2014-09-05 10:48:21 +0200 | [diff] [blame] | 3336 | return true; |
Joerg Roedel | bdddadc | 2012-07-02 18:38:13 +0200 | [diff] [blame] | 3337 | case IOMMU_CAP_INTR_REMAP: |
Joerg Roedel | ab63648 | 2014-09-05 10:48:21 +0200 | [diff] [blame] | 3338 | return (irq_remapping_enabled == 1); |
Will Deacon | cfdeec2 | 2014-10-27 11:24:48 +0000 | [diff] [blame] | 3339 | case IOMMU_CAP_NOEXEC: |
| 3340 | return false; |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 3341 | } |
| 3342 | |
Joerg Roedel | ab63648 | 2014-09-05 10:48:21 +0200 | [diff] [blame] | 3343 | return false; |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 3344 | } |
| 3345 | |
Joerg Roedel | 35cf248 | 2015-05-28 18:41:37 +0200 | [diff] [blame] | 3346 | static void amd_iommu_get_dm_regions(struct device *dev, |
| 3347 | struct list_head *head) |
| 3348 | { |
| 3349 | struct unity_map_entry *entry; |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 3350 | int devid; |
Joerg Roedel | 35cf248 | 2015-05-28 18:41:37 +0200 | [diff] [blame] | 3351 | |
| 3352 | devid = get_device_id(dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 3353 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 3354 | return; |
Joerg Roedel | 35cf248 | 2015-05-28 18:41:37 +0200 | [diff] [blame] | 3355 | |
| 3356 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 3357 | struct iommu_dm_region *region; |
| 3358 | |
| 3359 | if (devid < entry->devid_start || devid > entry->devid_end) |
| 3360 | continue; |
| 3361 | |
| 3362 | region = kzalloc(sizeof(*region), GFP_KERNEL); |
| 3363 | if (!region) { |
| 3364 | pr_err("Out of memory allocating dm-regions for %s\n", |
| 3365 | dev_name(dev)); |
| 3366 | return; |
| 3367 | } |
| 3368 | |
| 3369 | region->start = entry->address_start; |
| 3370 | region->length = entry->address_end - entry->address_start; |
| 3371 | if (entry->prot & IOMMU_PROT_IR) |
| 3372 | region->prot |= IOMMU_READ; |
| 3373 | if (entry->prot & IOMMU_PROT_IW) |
| 3374 | region->prot |= IOMMU_WRITE; |
| 3375 | |
| 3376 | list_add_tail(®ion->list, head); |
| 3377 | } |
| 3378 | } |
| 3379 | |
| 3380 | static void amd_iommu_put_dm_regions(struct device *dev, |
| 3381 | struct list_head *head) |
| 3382 | { |
| 3383 | struct iommu_dm_region *entry, *next; |
| 3384 | |
| 3385 | list_for_each_entry_safe(entry, next, head, list) |
| 3386 | kfree(entry); |
| 3387 | } |
| 3388 | |
Joerg Roedel | 8d54d6c | 2016-07-05 13:32:20 +0200 | [diff] [blame] | 3389 | static void amd_iommu_apply_dm_region(struct device *dev, |
| 3390 | struct iommu_domain *domain, |
| 3391 | struct iommu_dm_region *region) |
| 3392 | { |
| 3393 | struct protection_domain *pdomain = to_pdomain(domain); |
| 3394 | struct dma_ops_domain *dma_dom = pdomain->priv; |
| 3395 | unsigned long start, end; |
| 3396 | |
| 3397 | start = IOVA_PFN(region->start); |
| 3398 | end = IOVA_PFN(region->start + region->length); |
| 3399 | |
| 3400 | WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL); |
| 3401 | } |
| 3402 | |
Thierry Reding | b22f643 | 2014-06-27 09:03:12 +0200 | [diff] [blame] | 3403 | static const struct iommu_ops amd_iommu_ops = { |
Joerg Roedel | ab63648 | 2014-09-05 10:48:21 +0200 | [diff] [blame] | 3404 | .capable = amd_iommu_capable, |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3405 | .domain_alloc = amd_iommu_domain_alloc, |
| 3406 | .domain_free = amd_iommu_domain_free, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3407 | .attach_dev = amd_iommu_attach_device, |
| 3408 | .detach_dev = amd_iommu_detach_device, |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3409 | .map = amd_iommu_map, |
| 3410 | .unmap = amd_iommu_unmap, |
Olav Haugan | 315786e | 2014-10-25 09:55:16 -0700 | [diff] [blame] | 3411 | .map_sg = default_iommu_map_sg, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3412 | .iova_to_phys = amd_iommu_iova_to_phys, |
Joerg Roedel | aafd8ba | 2015-05-28 18:41:39 +0200 | [diff] [blame] | 3413 | .add_device = amd_iommu_add_device, |
| 3414 | .remove_device = amd_iommu_remove_device, |
Wan Zongshun | b097d11 | 2016-04-01 09:06:04 -0400 | [diff] [blame] | 3415 | .device_group = amd_iommu_device_group, |
Joerg Roedel | 35cf248 | 2015-05-28 18:41:37 +0200 | [diff] [blame] | 3416 | .get_dm_regions = amd_iommu_get_dm_regions, |
| 3417 | .put_dm_regions = amd_iommu_put_dm_regions, |
Joerg Roedel | 8d54d6c | 2016-07-05 13:32:20 +0200 | [diff] [blame] | 3418 | .apply_dm_region = amd_iommu_apply_dm_region, |
Ohad Ben-Cohen | aa3de9c | 2011-11-10 11:32:29 +0200 | [diff] [blame] | 3419 | .pgsize_bitmap = AMD_IOMMU_PGSIZES, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3420 | }; |
| 3421 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3422 | /***************************************************************************** |
| 3423 | * |
| 3424 | * The next functions do a basic initialization of IOMMU for pass through |
| 3425 | * mode |
| 3426 | * |
| 3427 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 3428 | * DMA-API translation. |
| 3429 | * |
| 3430 | *****************************************************************************/ |
| 3431 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 3432 | /* IOMMUv2 specific functions */ |
| 3433 | int amd_iommu_register_ppr_notifier(struct notifier_block *nb) |
| 3434 | { |
| 3435 | return atomic_notifier_chain_register(&ppr_notifier, nb); |
| 3436 | } |
| 3437 | EXPORT_SYMBOL(amd_iommu_register_ppr_notifier); |
| 3438 | |
| 3439 | int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb) |
| 3440 | { |
| 3441 | return atomic_notifier_chain_unregister(&ppr_notifier, nb); |
| 3442 | } |
| 3443 | EXPORT_SYMBOL(amd_iommu_unregister_ppr_notifier); |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3444 | |
| 3445 | void amd_iommu_domain_direct_map(struct iommu_domain *dom) |
| 3446 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3447 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3448 | unsigned long flags; |
| 3449 | |
| 3450 | spin_lock_irqsave(&domain->lock, flags); |
| 3451 | |
| 3452 | /* Update data structure */ |
| 3453 | domain->mode = PAGE_MODE_NONE; |
| 3454 | domain->updated = true; |
| 3455 | |
| 3456 | /* Make changes visible to IOMMUs */ |
| 3457 | update_domain(domain); |
| 3458 | |
| 3459 | /* Page-table is not visible to IOMMU anymore, so free it */ |
| 3460 | free_pagetable(domain); |
| 3461 | |
| 3462 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3463 | } |
| 3464 | EXPORT_SYMBOL(amd_iommu_domain_direct_map); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 3465 | |
| 3466 | int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids) |
| 3467 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3468 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 3469 | unsigned long flags; |
| 3470 | int levels, ret; |
| 3471 | |
| 3472 | if (pasids <= 0 || pasids > (PASID_MASK + 1)) |
| 3473 | return -EINVAL; |
| 3474 | |
| 3475 | /* Number of GCR3 table levels required */ |
| 3476 | for (levels = 0; (pasids - 1) & ~0x1ff; pasids >>= 9) |
| 3477 | levels += 1; |
| 3478 | |
| 3479 | if (levels > amd_iommu_max_glx_val) |
| 3480 | return -EINVAL; |
| 3481 | |
| 3482 | spin_lock_irqsave(&domain->lock, flags); |
| 3483 | |
| 3484 | /* |
| 3485 | * Save us all sanity checks whether devices already in the |
| 3486 | * domain support IOMMUv2. Just force that the domain has no |
| 3487 | * devices attached when it is switched into IOMMUv2 mode. |
| 3488 | */ |
| 3489 | ret = -EBUSY; |
| 3490 | if (domain->dev_cnt > 0 || domain->flags & PD_IOMMUV2_MASK) |
| 3491 | goto out; |
| 3492 | |
| 3493 | ret = -ENOMEM; |
| 3494 | domain->gcr3_tbl = (void *)get_zeroed_page(GFP_ATOMIC); |
| 3495 | if (domain->gcr3_tbl == NULL) |
| 3496 | goto out; |
| 3497 | |
| 3498 | domain->glx = levels; |
| 3499 | domain->flags |= PD_IOMMUV2_MASK; |
| 3500 | domain->updated = true; |
| 3501 | |
| 3502 | update_domain(domain); |
| 3503 | |
| 3504 | ret = 0; |
| 3505 | |
| 3506 | out: |
| 3507 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3508 | |
| 3509 | return ret; |
| 3510 | } |
| 3511 | EXPORT_SYMBOL(amd_iommu_domain_enable_v2); |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 3512 | |
| 3513 | static int __flush_pasid(struct protection_domain *domain, int pasid, |
| 3514 | u64 address, bool size) |
| 3515 | { |
| 3516 | struct iommu_dev_data *dev_data; |
| 3517 | struct iommu_cmd cmd; |
| 3518 | int i, ret; |
| 3519 | |
| 3520 | if (!(domain->flags & PD_IOMMUV2_MASK)) |
| 3521 | return -EINVAL; |
| 3522 | |
| 3523 | build_inv_iommu_pasid(&cmd, domain->id, pasid, address, size); |
| 3524 | |
| 3525 | /* |
| 3526 | * IOMMU TLB needs to be flushed before Device TLB to |
| 3527 | * prevent device TLB refill from IOMMU TLB |
| 3528 | */ |
| 3529 | for (i = 0; i < amd_iommus_present; ++i) { |
| 3530 | if (domain->dev_iommu[i] == 0) |
| 3531 | continue; |
| 3532 | |
| 3533 | ret = iommu_queue_command(amd_iommus[i], &cmd); |
| 3534 | if (ret != 0) |
| 3535 | goto out; |
| 3536 | } |
| 3537 | |
| 3538 | /* Wait until IOMMU TLB flushes are complete */ |
| 3539 | domain_flush_complete(domain); |
| 3540 | |
| 3541 | /* Now flush device TLBs */ |
| 3542 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
| 3543 | struct amd_iommu *iommu; |
| 3544 | int qdep; |
| 3545 | |
Joerg Roedel | 1c1cc45 | 2015-07-30 11:24:45 +0200 | [diff] [blame] | 3546 | /* |
| 3547 | There might be non-IOMMUv2 capable devices in an IOMMUv2 |
| 3548 | * domain. |
| 3549 | */ |
| 3550 | if (!dev_data->ats.enabled) |
| 3551 | continue; |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 3552 | |
| 3553 | qdep = dev_data->ats.qdep; |
| 3554 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 3555 | |
| 3556 | build_inv_iotlb_pasid(&cmd, dev_data->devid, pasid, |
| 3557 | qdep, address, size); |
| 3558 | |
| 3559 | ret = iommu_queue_command(iommu, &cmd); |
| 3560 | if (ret != 0) |
| 3561 | goto out; |
| 3562 | } |
| 3563 | |
| 3564 | /* Wait until all device TLBs are flushed */ |
| 3565 | domain_flush_complete(domain); |
| 3566 | |
| 3567 | ret = 0; |
| 3568 | |
| 3569 | out: |
| 3570 | |
| 3571 | return ret; |
| 3572 | } |
| 3573 | |
| 3574 | static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid, |
| 3575 | u64 address) |
| 3576 | { |
| 3577 | return __flush_pasid(domain, pasid, address, false); |
| 3578 | } |
| 3579 | |
| 3580 | int amd_iommu_flush_page(struct iommu_domain *dom, int pasid, |
| 3581 | u64 address) |
| 3582 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3583 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 3584 | unsigned long flags; |
| 3585 | int ret; |
| 3586 | |
| 3587 | spin_lock_irqsave(&domain->lock, flags); |
| 3588 | ret = __amd_iommu_flush_page(domain, pasid, address); |
| 3589 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3590 | |
| 3591 | return ret; |
| 3592 | } |
| 3593 | EXPORT_SYMBOL(amd_iommu_flush_page); |
| 3594 | |
| 3595 | static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid) |
| 3596 | { |
| 3597 | return __flush_pasid(domain, pasid, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, |
| 3598 | true); |
| 3599 | } |
| 3600 | |
| 3601 | int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid) |
| 3602 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3603 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 3604 | unsigned long flags; |
| 3605 | int ret; |
| 3606 | |
| 3607 | spin_lock_irqsave(&domain->lock, flags); |
| 3608 | ret = __amd_iommu_flush_tlb(domain, pasid); |
| 3609 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3610 | |
| 3611 | return ret; |
| 3612 | } |
| 3613 | EXPORT_SYMBOL(amd_iommu_flush_tlb); |
| 3614 | |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 3615 | static u64 *__get_gcr3_pte(u64 *root, int level, int pasid, bool alloc) |
| 3616 | { |
| 3617 | int index; |
| 3618 | u64 *pte; |
| 3619 | |
| 3620 | while (true) { |
| 3621 | |
| 3622 | index = (pasid >> (9 * level)) & 0x1ff; |
| 3623 | pte = &root[index]; |
| 3624 | |
| 3625 | if (level == 0) |
| 3626 | break; |
| 3627 | |
| 3628 | if (!(*pte & GCR3_VALID)) { |
| 3629 | if (!alloc) |
| 3630 | return NULL; |
| 3631 | |
| 3632 | root = (void *)get_zeroed_page(GFP_ATOMIC); |
| 3633 | if (root == NULL) |
| 3634 | return NULL; |
| 3635 | |
| 3636 | *pte = __pa(root) | GCR3_VALID; |
| 3637 | } |
| 3638 | |
| 3639 | root = __va(*pte & PAGE_MASK); |
| 3640 | |
| 3641 | level -= 1; |
| 3642 | } |
| 3643 | |
| 3644 | return pte; |
| 3645 | } |
| 3646 | |
| 3647 | static int __set_gcr3(struct protection_domain *domain, int pasid, |
| 3648 | unsigned long cr3) |
| 3649 | { |
| 3650 | u64 *pte; |
| 3651 | |
| 3652 | if (domain->mode != PAGE_MODE_NONE) |
| 3653 | return -EINVAL; |
| 3654 | |
| 3655 | pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, true); |
| 3656 | if (pte == NULL) |
| 3657 | return -ENOMEM; |
| 3658 | |
| 3659 | *pte = (cr3 & PAGE_MASK) | GCR3_VALID; |
| 3660 | |
| 3661 | return __amd_iommu_flush_tlb(domain, pasid); |
| 3662 | } |
| 3663 | |
| 3664 | static int __clear_gcr3(struct protection_domain *domain, int pasid) |
| 3665 | { |
| 3666 | u64 *pte; |
| 3667 | |
| 3668 | if (domain->mode != PAGE_MODE_NONE) |
| 3669 | return -EINVAL; |
| 3670 | |
| 3671 | pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, false); |
| 3672 | if (pte == NULL) |
| 3673 | return 0; |
| 3674 | |
| 3675 | *pte = 0; |
| 3676 | |
| 3677 | return __amd_iommu_flush_tlb(domain, pasid); |
| 3678 | } |
| 3679 | |
| 3680 | int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid, |
| 3681 | unsigned long cr3) |
| 3682 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3683 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 3684 | unsigned long flags; |
| 3685 | int ret; |
| 3686 | |
| 3687 | spin_lock_irqsave(&domain->lock, flags); |
| 3688 | ret = __set_gcr3(domain, pasid, cr3); |
| 3689 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3690 | |
| 3691 | return ret; |
| 3692 | } |
| 3693 | EXPORT_SYMBOL(amd_iommu_domain_set_gcr3); |
| 3694 | |
| 3695 | int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid) |
| 3696 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3697 | struct protection_domain *domain = to_pdomain(dom); |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 3698 | unsigned long flags; |
| 3699 | int ret; |
| 3700 | |
| 3701 | spin_lock_irqsave(&domain->lock, flags); |
| 3702 | ret = __clear_gcr3(domain, pasid); |
| 3703 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3704 | |
| 3705 | return ret; |
| 3706 | } |
| 3707 | EXPORT_SYMBOL(amd_iommu_domain_clear_gcr3); |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 3708 | |
| 3709 | int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid, |
| 3710 | int status, int tag) |
| 3711 | { |
| 3712 | struct iommu_dev_data *dev_data; |
| 3713 | struct amd_iommu *iommu; |
| 3714 | struct iommu_cmd cmd; |
| 3715 | |
| 3716 | dev_data = get_dev_data(&pdev->dev); |
| 3717 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 3718 | |
| 3719 | build_complete_ppr(&cmd, dev_data->devid, pasid, status, |
| 3720 | tag, dev_data->pri_tlp); |
| 3721 | |
| 3722 | return iommu_queue_command(iommu, &cmd); |
| 3723 | } |
| 3724 | EXPORT_SYMBOL(amd_iommu_complete_ppr); |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3725 | |
| 3726 | struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev) |
| 3727 | { |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3728 | struct protection_domain *pdomain; |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3729 | |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3730 | pdomain = get_domain(&pdev->dev); |
| 3731 | if (IS_ERR(pdomain)) |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3732 | return NULL; |
| 3733 | |
| 3734 | /* Only return IOMMUv2 domains */ |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3735 | if (!(pdomain->flags & PD_IOMMUV2_MASK)) |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3736 | return NULL; |
| 3737 | |
Joerg Roedel | 3f4b87b | 2015-03-26 13:43:07 +0100 | [diff] [blame] | 3738 | return &pdomain->domain; |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3739 | } |
| 3740 | EXPORT_SYMBOL(amd_iommu_get_v2_domain); |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame] | 3741 | |
| 3742 | void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum) |
| 3743 | { |
| 3744 | struct iommu_dev_data *dev_data; |
| 3745 | |
| 3746 | if (!amd_iommu_v2_supported()) |
| 3747 | return; |
| 3748 | |
| 3749 | dev_data = get_dev_data(&pdev->dev); |
| 3750 | dev_data->errata |= (1 << erratum); |
| 3751 | } |
| 3752 | EXPORT_SYMBOL(amd_iommu_enable_device_erratum); |
Joerg Roedel | 52efdb8 | 2011-12-07 12:01:36 +0100 | [diff] [blame] | 3753 | |
| 3754 | int amd_iommu_device_info(struct pci_dev *pdev, |
| 3755 | struct amd_iommu_device_info *info) |
| 3756 | { |
| 3757 | int max_pasids; |
| 3758 | int pos; |
| 3759 | |
| 3760 | if (pdev == NULL || info == NULL) |
| 3761 | return -EINVAL; |
| 3762 | |
| 3763 | if (!amd_iommu_v2_supported()) |
| 3764 | return -EINVAL; |
| 3765 | |
| 3766 | memset(info, 0, sizeof(*info)); |
| 3767 | |
| 3768 | pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS); |
| 3769 | if (pos) |
| 3770 | info->flags |= AMD_IOMMU_DEVICE_FLAG_ATS_SUP; |
| 3771 | |
| 3772 | pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); |
| 3773 | if (pos) |
| 3774 | info->flags |= AMD_IOMMU_DEVICE_FLAG_PRI_SUP; |
| 3775 | |
| 3776 | pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID); |
| 3777 | if (pos) { |
| 3778 | int features; |
| 3779 | |
| 3780 | max_pasids = 1 << (9 * (amd_iommu_max_glx_val + 1)); |
| 3781 | max_pasids = min(max_pasids, (1 << 20)); |
| 3782 | |
| 3783 | info->flags |= AMD_IOMMU_DEVICE_FLAG_PASID_SUP; |
| 3784 | info->max_pasids = min(pci_max_pasids(pdev), max_pasids); |
| 3785 | |
| 3786 | features = pci_pasid_features(pdev); |
| 3787 | if (features & PCI_PASID_CAP_EXEC) |
| 3788 | info->flags |= AMD_IOMMU_DEVICE_FLAG_EXEC_SUP; |
| 3789 | if (features & PCI_PASID_CAP_PRIV) |
| 3790 | info->flags |= AMD_IOMMU_DEVICE_FLAG_PRIV_SUP; |
| 3791 | } |
| 3792 | |
| 3793 | return 0; |
| 3794 | } |
| 3795 | EXPORT_SYMBOL(amd_iommu_device_info); |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3796 | |
| 3797 | #ifdef CONFIG_IRQ_REMAP |
| 3798 | |
| 3799 | /***************************************************************************** |
| 3800 | * |
| 3801 | * Interrupt Remapping Implementation |
| 3802 | * |
| 3803 | *****************************************************************************/ |
| 3804 | |
| 3805 | union irte { |
| 3806 | u32 val; |
| 3807 | struct { |
| 3808 | u32 valid : 1, |
| 3809 | no_fault : 1, |
| 3810 | int_type : 3, |
| 3811 | rq_eoi : 1, |
| 3812 | dm : 1, |
| 3813 | rsvd_1 : 1, |
| 3814 | destination : 8, |
| 3815 | vector : 8, |
| 3816 | rsvd_2 : 8; |
| 3817 | } fields; |
| 3818 | }; |
| 3819 | |
Jiang Liu | 9c72496 | 2015-04-14 10:29:52 +0800 | [diff] [blame] | 3820 | struct irq_2_irte { |
| 3821 | u16 devid; /* Device ID for IRTE table */ |
| 3822 | u16 index; /* Index into IRTE table*/ |
| 3823 | }; |
| 3824 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 3825 | struct amd_ir_data { |
| 3826 | struct irq_2_irte irq_2_irte; |
| 3827 | union irte irte_entry; |
| 3828 | union { |
| 3829 | struct msi_msg msi_entry; |
| 3830 | }; |
| 3831 | }; |
| 3832 | |
| 3833 | static struct irq_chip amd_ir_chip; |
| 3834 | |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3835 | #define DTE_IRQ_PHYS_ADDR_MASK (((1ULL << 45)-1) << 6) |
| 3836 | #define DTE_IRQ_REMAP_INTCTL (2ULL << 60) |
| 3837 | #define DTE_IRQ_TABLE_LEN (8ULL << 1) |
| 3838 | #define DTE_IRQ_REMAP_ENABLE 1ULL |
| 3839 | |
| 3840 | static void set_dte_irq_entry(u16 devid, struct irq_remap_table *table) |
| 3841 | { |
| 3842 | u64 dte; |
| 3843 | |
| 3844 | dte = amd_iommu_dev_table[devid].data[2]; |
| 3845 | dte &= ~DTE_IRQ_PHYS_ADDR_MASK; |
| 3846 | dte |= virt_to_phys(table->table); |
| 3847 | dte |= DTE_IRQ_REMAP_INTCTL; |
| 3848 | dte |= DTE_IRQ_TABLE_LEN; |
| 3849 | dte |= DTE_IRQ_REMAP_ENABLE; |
| 3850 | |
| 3851 | amd_iommu_dev_table[devid].data[2] = dte; |
| 3852 | } |
| 3853 | |
| 3854 | #define IRTE_ALLOCATED (~1U) |
| 3855 | |
| 3856 | static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic) |
| 3857 | { |
| 3858 | struct irq_remap_table *table = NULL; |
| 3859 | struct amd_iommu *iommu; |
| 3860 | unsigned long flags; |
| 3861 | u16 alias; |
| 3862 | |
| 3863 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 3864 | |
| 3865 | iommu = amd_iommu_rlookup_table[devid]; |
| 3866 | if (!iommu) |
| 3867 | goto out_unlock; |
| 3868 | |
| 3869 | table = irq_lookup_table[devid]; |
| 3870 | if (table) |
| 3871 | goto out; |
| 3872 | |
| 3873 | alias = amd_iommu_alias_table[devid]; |
| 3874 | table = irq_lookup_table[alias]; |
| 3875 | if (table) { |
| 3876 | irq_lookup_table[devid] = table; |
| 3877 | set_dte_irq_entry(devid, table); |
| 3878 | iommu_flush_dte(iommu, devid); |
| 3879 | goto out; |
| 3880 | } |
| 3881 | |
| 3882 | /* Nothing there yet, allocate new irq remapping table */ |
| 3883 | table = kzalloc(sizeof(*table), GFP_ATOMIC); |
| 3884 | if (!table) |
| 3885 | goto out; |
| 3886 | |
Joerg Roedel | 197887f | 2013-04-09 21:14:08 +0200 | [diff] [blame] | 3887 | /* Initialize table spin-lock */ |
| 3888 | spin_lock_init(&table->lock); |
| 3889 | |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3890 | if (ioapic) |
| 3891 | /* Keep the first 32 indexes free for IOAPIC interrupts */ |
| 3892 | table->min_index = 32; |
| 3893 | |
| 3894 | table->table = kmem_cache_alloc(amd_iommu_irq_cache, GFP_ATOMIC); |
| 3895 | if (!table->table) { |
| 3896 | kfree(table); |
Dan Carpenter | 821f0f6 | 2012-10-02 11:34:40 +0300 | [diff] [blame] | 3897 | table = NULL; |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3898 | goto out; |
| 3899 | } |
| 3900 | |
| 3901 | memset(table->table, 0, MAX_IRQS_PER_TABLE * sizeof(u32)); |
| 3902 | |
| 3903 | if (ioapic) { |
| 3904 | int i; |
| 3905 | |
| 3906 | for (i = 0; i < 32; ++i) |
| 3907 | table->table[i] = IRTE_ALLOCATED; |
| 3908 | } |
| 3909 | |
| 3910 | irq_lookup_table[devid] = table; |
| 3911 | set_dte_irq_entry(devid, table); |
| 3912 | iommu_flush_dte(iommu, devid); |
| 3913 | if (devid != alias) { |
| 3914 | irq_lookup_table[alias] = table; |
Alex Williamson | e028a9e | 2014-04-22 10:08:40 -0600 | [diff] [blame] | 3915 | set_dte_irq_entry(alias, table); |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3916 | iommu_flush_dte(iommu, alias); |
| 3917 | } |
| 3918 | |
| 3919 | out: |
| 3920 | iommu_completion_wait(iommu); |
| 3921 | |
| 3922 | out_unlock: |
| 3923 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 3924 | |
| 3925 | return table; |
| 3926 | } |
| 3927 | |
Jiang Liu | 3c3d4f9 | 2015-04-13 14:11:38 +0800 | [diff] [blame] | 3928 | static int alloc_irq_index(u16 devid, int count) |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3929 | { |
| 3930 | struct irq_remap_table *table; |
| 3931 | unsigned long flags; |
| 3932 | int index, c; |
| 3933 | |
| 3934 | table = get_irq_table(devid, false); |
| 3935 | if (!table) |
| 3936 | return -ENODEV; |
| 3937 | |
| 3938 | spin_lock_irqsave(&table->lock, flags); |
| 3939 | |
| 3940 | /* Scan table for free entries */ |
| 3941 | for (c = 0, index = table->min_index; |
| 3942 | index < MAX_IRQS_PER_TABLE; |
| 3943 | ++index) { |
| 3944 | if (table->table[index] == 0) |
| 3945 | c += 1; |
| 3946 | else |
| 3947 | c = 0; |
| 3948 | |
| 3949 | if (c == count) { |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3950 | for (; c != 0; --c) |
| 3951 | table->table[index - c + 1] = IRTE_ALLOCATED; |
| 3952 | |
| 3953 | index -= count - 1; |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3954 | goto out; |
| 3955 | } |
| 3956 | } |
| 3957 | |
| 3958 | index = -ENOSPC; |
| 3959 | |
| 3960 | out: |
| 3961 | spin_unlock_irqrestore(&table->lock, flags); |
| 3962 | |
| 3963 | return index; |
| 3964 | } |
| 3965 | |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 3966 | static int modify_irte(u16 devid, int index, union irte irte) |
| 3967 | { |
| 3968 | struct irq_remap_table *table; |
| 3969 | struct amd_iommu *iommu; |
| 3970 | unsigned long flags; |
| 3971 | |
| 3972 | iommu = amd_iommu_rlookup_table[devid]; |
| 3973 | if (iommu == NULL) |
| 3974 | return -EINVAL; |
| 3975 | |
| 3976 | table = get_irq_table(devid, false); |
| 3977 | if (!table) |
| 3978 | return -ENOMEM; |
| 3979 | |
| 3980 | spin_lock_irqsave(&table->lock, flags); |
| 3981 | table->table[index] = irte.val; |
| 3982 | spin_unlock_irqrestore(&table->lock, flags); |
| 3983 | |
| 3984 | iommu_flush_irt(iommu, devid); |
| 3985 | iommu_completion_wait(iommu); |
| 3986 | |
| 3987 | return 0; |
| 3988 | } |
| 3989 | |
| 3990 | static void free_irte(u16 devid, int index) |
| 3991 | { |
| 3992 | struct irq_remap_table *table; |
| 3993 | struct amd_iommu *iommu; |
| 3994 | unsigned long flags; |
| 3995 | |
| 3996 | iommu = amd_iommu_rlookup_table[devid]; |
| 3997 | if (iommu == NULL) |
| 3998 | return; |
| 3999 | |
| 4000 | table = get_irq_table(devid, false); |
| 4001 | if (!table) |
| 4002 | return; |
| 4003 | |
| 4004 | spin_lock_irqsave(&table->lock, flags); |
| 4005 | table->table[index] = 0; |
| 4006 | spin_unlock_irqrestore(&table->lock, flags); |
| 4007 | |
| 4008 | iommu_flush_irt(iommu, devid); |
| 4009 | iommu_completion_wait(iommu); |
| 4010 | } |
| 4011 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4012 | static int get_devid(struct irq_alloc_info *info) |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4013 | { |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4014 | int devid = -1; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4015 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4016 | switch (info->type) { |
| 4017 | case X86_IRQ_ALLOC_TYPE_IOAPIC: |
| 4018 | devid = get_ioapic_devid(info->ioapic_id); |
| 4019 | break; |
| 4020 | case X86_IRQ_ALLOC_TYPE_HPET: |
| 4021 | devid = get_hpet_devid(info->hpet_id); |
| 4022 | break; |
| 4023 | case X86_IRQ_ALLOC_TYPE_MSI: |
| 4024 | case X86_IRQ_ALLOC_TYPE_MSIX: |
| 4025 | devid = get_device_id(&info->msi_dev->dev); |
| 4026 | break; |
| 4027 | default: |
| 4028 | BUG_ON(1); |
| 4029 | break; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4030 | } |
| 4031 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4032 | return devid; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4033 | } |
| 4034 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4035 | static struct irq_domain *get_ir_irq_domain(struct irq_alloc_info *info) |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4036 | { |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4037 | struct amd_iommu *iommu; |
| 4038 | int devid; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4039 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4040 | if (!info) |
| 4041 | return NULL; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4042 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4043 | devid = get_devid(info); |
| 4044 | if (devid >= 0) { |
| 4045 | iommu = amd_iommu_rlookup_table[devid]; |
| 4046 | if (iommu) |
| 4047 | return iommu->ir_domain; |
| 4048 | } |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4049 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4050 | return NULL; |
Joerg Roedel | 5527de7 | 2012-06-26 11:17:32 +0200 | [diff] [blame] | 4051 | } |
| 4052 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4053 | static struct irq_domain *get_irq_domain(struct irq_alloc_info *info) |
Joerg Roedel | 0b4d48c | 2012-06-26 14:54:17 +0200 | [diff] [blame] | 4054 | { |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4055 | struct amd_iommu *iommu; |
| 4056 | int devid; |
Joerg Roedel | 0b4d48c | 2012-06-26 14:54:17 +0200 | [diff] [blame] | 4057 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4058 | if (!info) |
| 4059 | return NULL; |
Joerg Roedel | 0b4d48c | 2012-06-26 14:54:17 +0200 | [diff] [blame] | 4060 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4061 | switch (info->type) { |
| 4062 | case X86_IRQ_ALLOC_TYPE_MSI: |
| 4063 | case X86_IRQ_ALLOC_TYPE_MSIX: |
| 4064 | devid = get_device_id(&info->msi_dev->dev); |
Joerg Roedel | 9ee35e4 | 2016-04-21 18:21:31 +0200 | [diff] [blame] | 4065 | if (devid < 0) |
Wan Zongshun | 7aba6cb | 2016-04-01 09:06:02 -0400 | [diff] [blame] | 4066 | return NULL; |
| 4067 | |
Dan Carpenter | 1fb260b | 2016-01-07 12:36:06 +0300 | [diff] [blame] | 4068 | iommu = amd_iommu_rlookup_table[devid]; |
| 4069 | if (iommu) |
| 4070 | return iommu->msi_domain; |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4071 | break; |
| 4072 | default: |
| 4073 | break; |
| 4074 | } |
Joerg Roedel | 0b4d48c | 2012-06-26 14:54:17 +0200 | [diff] [blame] | 4075 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4076 | return NULL; |
Joerg Roedel | d976195 | 2012-06-26 16:00:08 +0200 | [diff] [blame] | 4077 | } |
| 4078 | |
Joerg Roedel | 6b474b8 | 2012-06-26 16:46:04 +0200 | [diff] [blame] | 4079 | struct irq_remap_ops amd_iommu_irq_ops = { |
Joerg Roedel | 6b474b8 | 2012-06-26 16:46:04 +0200 | [diff] [blame] | 4080 | .prepare = amd_iommu_prepare, |
| 4081 | .enable = amd_iommu_enable, |
| 4082 | .disable = amd_iommu_disable, |
| 4083 | .reenable = amd_iommu_reenable, |
| 4084 | .enable_faulting = amd_iommu_enable_faulting, |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4085 | .get_ir_irq_domain = get_ir_irq_domain, |
| 4086 | .get_irq_domain = get_irq_domain, |
Joerg Roedel | 6b474b8 | 2012-06-26 16:46:04 +0200 | [diff] [blame] | 4087 | }; |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4088 | |
| 4089 | static void irq_remapping_prepare_irte(struct amd_ir_data *data, |
| 4090 | struct irq_cfg *irq_cfg, |
| 4091 | struct irq_alloc_info *info, |
| 4092 | int devid, int index, int sub_handle) |
| 4093 | { |
| 4094 | struct irq_2_irte *irte_info = &data->irq_2_irte; |
| 4095 | struct msi_msg *msg = &data->msi_entry; |
| 4096 | union irte *irte = &data->irte_entry; |
| 4097 | struct IO_APIC_route_entry *entry; |
| 4098 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4099 | data->irq_2_irte.devid = devid; |
| 4100 | data->irq_2_irte.index = index + sub_handle; |
| 4101 | |
| 4102 | /* Setup IRTE for IOMMU */ |
| 4103 | irte->val = 0; |
| 4104 | irte->fields.vector = irq_cfg->vector; |
| 4105 | irte->fields.int_type = apic->irq_delivery_mode; |
| 4106 | irte->fields.destination = irq_cfg->dest_apicid; |
| 4107 | irte->fields.dm = apic->irq_dest_mode; |
| 4108 | irte->fields.valid = 1; |
| 4109 | |
| 4110 | switch (info->type) { |
| 4111 | case X86_IRQ_ALLOC_TYPE_IOAPIC: |
| 4112 | /* Setup IOAPIC entry */ |
| 4113 | entry = info->ioapic_entry; |
| 4114 | info->ioapic_entry = NULL; |
| 4115 | memset(entry, 0, sizeof(*entry)); |
| 4116 | entry->vector = index; |
| 4117 | entry->mask = 0; |
| 4118 | entry->trigger = info->ioapic_trigger; |
| 4119 | entry->polarity = info->ioapic_polarity; |
| 4120 | /* Mask level triggered irqs. */ |
| 4121 | if (info->ioapic_trigger) |
| 4122 | entry->mask = 1; |
| 4123 | break; |
| 4124 | |
| 4125 | case X86_IRQ_ALLOC_TYPE_HPET: |
| 4126 | case X86_IRQ_ALLOC_TYPE_MSI: |
| 4127 | case X86_IRQ_ALLOC_TYPE_MSIX: |
| 4128 | msg->address_hi = MSI_ADDR_BASE_HI; |
| 4129 | msg->address_lo = MSI_ADDR_BASE_LO; |
| 4130 | msg->data = irte_info->index; |
| 4131 | break; |
| 4132 | |
| 4133 | default: |
| 4134 | BUG_ON(1); |
| 4135 | break; |
| 4136 | } |
| 4137 | } |
| 4138 | |
| 4139 | static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq, |
| 4140 | unsigned int nr_irqs, void *arg) |
| 4141 | { |
| 4142 | struct irq_alloc_info *info = arg; |
| 4143 | struct irq_data *irq_data; |
| 4144 | struct amd_ir_data *data; |
| 4145 | struct irq_cfg *cfg; |
| 4146 | int i, ret, devid; |
| 4147 | int index = -1; |
| 4148 | |
| 4149 | if (!info) |
| 4150 | return -EINVAL; |
| 4151 | if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_MSI && |
| 4152 | info->type != X86_IRQ_ALLOC_TYPE_MSIX) |
| 4153 | return -EINVAL; |
| 4154 | |
| 4155 | /* |
| 4156 | * With IRQ remapping enabled, don't need contiguous CPU vectors |
| 4157 | * to support multiple MSI interrupts. |
| 4158 | */ |
| 4159 | if (info->type == X86_IRQ_ALLOC_TYPE_MSI) |
| 4160 | info->flags &= ~X86_IRQ_ALLOC_CONTIGUOUS_VECTORS; |
| 4161 | |
| 4162 | devid = get_devid(info); |
| 4163 | if (devid < 0) |
| 4164 | return -EINVAL; |
| 4165 | |
| 4166 | ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); |
| 4167 | if (ret < 0) |
| 4168 | return ret; |
| 4169 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4170 | if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC) { |
| 4171 | if (get_irq_table(devid, true)) |
| 4172 | index = info->ioapic_pin; |
| 4173 | else |
| 4174 | ret = -ENOMEM; |
| 4175 | } else { |
Jiang Liu | 3c3d4f9 | 2015-04-13 14:11:38 +0800 | [diff] [blame] | 4176 | index = alloc_irq_index(devid, nr_irqs); |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4177 | } |
| 4178 | if (index < 0) { |
| 4179 | pr_warn("Failed to allocate IRTE\n"); |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4180 | goto out_free_parent; |
| 4181 | } |
| 4182 | |
| 4183 | for (i = 0; i < nr_irqs; i++) { |
| 4184 | irq_data = irq_domain_get_irq_data(domain, virq + i); |
| 4185 | cfg = irqd_cfg(irq_data); |
| 4186 | if (!irq_data || !cfg) { |
| 4187 | ret = -EINVAL; |
| 4188 | goto out_free_data; |
| 4189 | } |
| 4190 | |
Joerg Roedel | a130e69 | 2015-08-13 11:07:25 +0200 | [diff] [blame] | 4191 | ret = -ENOMEM; |
| 4192 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 4193 | if (!data) |
| 4194 | goto out_free_data; |
| 4195 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4196 | irq_data->hwirq = (devid << 16) + i; |
| 4197 | irq_data->chip_data = data; |
| 4198 | irq_data->chip = &amd_ir_chip; |
| 4199 | irq_remapping_prepare_irte(data, cfg, info, devid, index, i); |
| 4200 | irq_set_status_flags(virq + i, IRQ_MOVE_PCNTXT); |
| 4201 | } |
Joerg Roedel | a130e69 | 2015-08-13 11:07:25 +0200 | [diff] [blame] | 4202 | |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4203 | return 0; |
| 4204 | |
| 4205 | out_free_data: |
| 4206 | for (i--; i >= 0; i--) { |
| 4207 | irq_data = irq_domain_get_irq_data(domain, virq + i); |
| 4208 | if (irq_data) |
| 4209 | kfree(irq_data->chip_data); |
| 4210 | } |
| 4211 | for (i = 0; i < nr_irqs; i++) |
| 4212 | free_irte(devid, index + i); |
| 4213 | out_free_parent: |
| 4214 | irq_domain_free_irqs_common(domain, virq, nr_irqs); |
| 4215 | return ret; |
| 4216 | } |
| 4217 | |
| 4218 | static void irq_remapping_free(struct irq_domain *domain, unsigned int virq, |
| 4219 | unsigned int nr_irqs) |
| 4220 | { |
| 4221 | struct irq_2_irte *irte_info; |
| 4222 | struct irq_data *irq_data; |
| 4223 | struct amd_ir_data *data; |
| 4224 | int i; |
| 4225 | |
| 4226 | for (i = 0; i < nr_irqs; i++) { |
| 4227 | irq_data = irq_domain_get_irq_data(domain, virq + i); |
| 4228 | if (irq_data && irq_data->chip_data) { |
| 4229 | data = irq_data->chip_data; |
| 4230 | irte_info = &data->irq_2_irte; |
| 4231 | free_irte(irte_info->devid, irte_info->index); |
| 4232 | kfree(data); |
| 4233 | } |
| 4234 | } |
| 4235 | irq_domain_free_irqs_common(domain, virq, nr_irqs); |
| 4236 | } |
| 4237 | |
| 4238 | static void irq_remapping_activate(struct irq_domain *domain, |
| 4239 | struct irq_data *irq_data) |
| 4240 | { |
| 4241 | struct amd_ir_data *data = irq_data->chip_data; |
| 4242 | struct irq_2_irte *irte_info = &data->irq_2_irte; |
| 4243 | |
| 4244 | modify_irte(irte_info->devid, irte_info->index, data->irte_entry); |
| 4245 | } |
| 4246 | |
| 4247 | static void irq_remapping_deactivate(struct irq_domain *domain, |
| 4248 | struct irq_data *irq_data) |
| 4249 | { |
| 4250 | struct amd_ir_data *data = irq_data->chip_data; |
| 4251 | struct irq_2_irte *irte_info = &data->irq_2_irte; |
| 4252 | union irte entry; |
| 4253 | |
| 4254 | entry.val = 0; |
| 4255 | modify_irte(irte_info->devid, irte_info->index, data->irte_entry); |
| 4256 | } |
| 4257 | |
| 4258 | static struct irq_domain_ops amd_ir_domain_ops = { |
| 4259 | .alloc = irq_remapping_alloc, |
| 4260 | .free = irq_remapping_free, |
| 4261 | .activate = irq_remapping_activate, |
| 4262 | .deactivate = irq_remapping_deactivate, |
| 4263 | }; |
| 4264 | |
| 4265 | static int amd_ir_set_affinity(struct irq_data *data, |
| 4266 | const struct cpumask *mask, bool force) |
| 4267 | { |
| 4268 | struct amd_ir_data *ir_data = data->chip_data; |
| 4269 | struct irq_2_irte *irte_info = &ir_data->irq_2_irte; |
| 4270 | struct irq_cfg *cfg = irqd_cfg(data); |
| 4271 | struct irq_data *parent = data->parent_data; |
| 4272 | int ret; |
| 4273 | |
| 4274 | ret = parent->chip->irq_set_affinity(parent, mask, force); |
| 4275 | if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE) |
| 4276 | return ret; |
| 4277 | |
| 4278 | /* |
| 4279 | * Atomically updates the IRTE with the new destination, vector |
| 4280 | * and flushes the interrupt entry cache. |
| 4281 | */ |
| 4282 | ir_data->irte_entry.fields.vector = cfg->vector; |
| 4283 | ir_data->irte_entry.fields.destination = cfg->dest_apicid; |
| 4284 | modify_irte(irte_info->devid, irte_info->index, ir_data->irte_entry); |
| 4285 | |
| 4286 | /* |
| 4287 | * After this point, all the interrupts will start arriving |
| 4288 | * at the new destination. So, time to cleanup the previous |
| 4289 | * vector allocation. |
| 4290 | */ |
Jiang Liu | c6c2002 | 2015-04-14 10:30:02 +0800 | [diff] [blame] | 4291 | send_cleanup_vector(cfg); |
Jiang Liu | 7c71d30 | 2015-04-13 14:11:33 +0800 | [diff] [blame] | 4292 | |
| 4293 | return IRQ_SET_MASK_OK_DONE; |
| 4294 | } |
| 4295 | |
| 4296 | static void ir_compose_msi_msg(struct irq_data *irq_data, struct msi_msg *msg) |
| 4297 | { |
| 4298 | struct amd_ir_data *ir_data = irq_data->chip_data; |
| 4299 | |
| 4300 | *msg = ir_data->msi_entry; |
| 4301 | } |
| 4302 | |
| 4303 | static struct irq_chip amd_ir_chip = { |
| 4304 | .irq_ack = ir_ack_apic_edge, |
| 4305 | .irq_set_affinity = amd_ir_set_affinity, |
| 4306 | .irq_compose_msi_msg = ir_compose_msi_msg, |
| 4307 | }; |
| 4308 | |
| 4309 | int amd_iommu_create_irq_domain(struct amd_iommu *iommu) |
| 4310 | { |
| 4311 | iommu->ir_domain = irq_domain_add_tree(NULL, &amd_ir_domain_ops, iommu); |
| 4312 | if (!iommu->ir_domain) |
| 4313 | return -ENOMEM; |
| 4314 | |
| 4315 | iommu->ir_domain->parent = arch_get_ir_parent_domain(); |
| 4316 | iommu->msi_domain = arch_create_msi_irq_domain(iommu->ir_domain); |
| 4317 | |
| 4318 | return 0; |
| 4319 | } |
Joerg Roedel | 2b32450 | 2012-06-21 16:29:10 +0200 | [diff] [blame] | 4320 | #endif |