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 | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 3 | * Author: Joerg Roedel <joerg.roedel@amd.com> |
| 4 | * Leo Duran <leo.duran@amd.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
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> |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 22 | #include <linux/pci-ats.h> |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 23 | #include <linux/bitmap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 25 | #include <linux/debugfs.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 26 | #include <linux/scatterlist.h> |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 27 | #include <linux/dma-mapping.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 28 | #include <linux/iommu-helper.h> |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 29 | #include <linux/iommu.h> |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 30 | #include <linux/delay.h> |
Joerg Roedel | 403f81d | 2011-06-14 16:44:25 +0200 | [diff] [blame] | 31 | #include <linux/amd-iommu.h> |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 32 | #include <linux/notifier.h> |
| 33 | #include <linux/export.h> |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 34 | #include <asm/msidef.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 35 | #include <asm/proto.h> |
FUJITA Tomonori | 46a7fa2 | 2008-07-11 10:23:42 +0900 | [diff] [blame] | 36 | #include <asm/iommu.h> |
Joerg Roedel | 1d9b16d | 2008-11-27 18:39:15 +0100 | [diff] [blame] | 37 | #include <asm/gart.h> |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 38 | #include <asm/dma.h> |
Joerg Roedel | 403f81d | 2011-06-14 16:44:25 +0200 | [diff] [blame] | 39 | |
| 40 | #include "amd_iommu_proto.h" |
| 41 | #include "amd_iommu_types.h" |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 42 | |
| 43 | #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) |
| 44 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 45 | #define LOOP_TIMEOUT 100000 |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 46 | |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 47 | static DEFINE_RWLOCK(amd_iommu_devtable_lock); |
| 48 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 49 | /* A list of preallocated protection domains */ |
| 50 | static LIST_HEAD(iommu_pd_list); |
| 51 | static DEFINE_SPINLOCK(iommu_pd_list_lock); |
| 52 | |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 53 | /* List of all available dev_data structures */ |
| 54 | static LIST_HEAD(dev_data_list); |
| 55 | static DEFINE_SPINLOCK(dev_data_list_lock); |
| 56 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 57 | /* |
| 58 | * Domain for untranslated devices - only allocated |
| 59 | * if iommu=pt passed on kernel cmd line. |
| 60 | */ |
| 61 | static struct protection_domain *pt_domain; |
| 62 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 63 | static struct iommu_ops amd_iommu_ops; |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 64 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 65 | static ATOMIC_NOTIFIER_HEAD(ppr_notifier); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 66 | int amd_iommu_max_glx_val = -1; |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 67 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 68 | /* |
| 69 | * general struct to manage commands send to an IOMMU |
| 70 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 71 | struct iommu_cmd { |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 72 | u32 data[4]; |
| 73 | }; |
| 74 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 75 | static void update_domain(struct protection_domain *domain); |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 76 | static int __init alloc_passthrough_domain(void); |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 77 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 78 | /**************************************************************************** |
| 79 | * |
| 80 | * Helper functions |
| 81 | * |
| 82 | ****************************************************************************/ |
| 83 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 84 | static struct iommu_dev_data *alloc_dev_data(u16 devid) |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 85 | { |
| 86 | struct iommu_dev_data *dev_data; |
| 87 | unsigned long flags; |
| 88 | |
| 89 | dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL); |
| 90 | if (!dev_data) |
| 91 | return NULL; |
| 92 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 93 | dev_data->devid = devid; |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 94 | atomic_set(&dev_data->bind, 0); |
| 95 | |
| 96 | spin_lock_irqsave(&dev_data_list_lock, flags); |
| 97 | list_add_tail(&dev_data->dev_data_list, &dev_data_list); |
| 98 | spin_unlock_irqrestore(&dev_data_list_lock, flags); |
| 99 | |
| 100 | return dev_data; |
| 101 | } |
| 102 | |
| 103 | static void free_dev_data(struct iommu_dev_data *dev_data) |
| 104 | { |
| 105 | unsigned long flags; |
| 106 | |
| 107 | spin_lock_irqsave(&dev_data_list_lock, flags); |
| 108 | list_del(&dev_data->dev_data_list); |
| 109 | spin_unlock_irqrestore(&dev_data_list_lock, flags); |
| 110 | |
| 111 | kfree(dev_data); |
| 112 | } |
| 113 | |
Joerg Roedel | 3b03bb7 | 2011-06-09 18:53:25 +0200 | [diff] [blame] | 114 | static struct iommu_dev_data *search_dev_data(u16 devid) |
| 115 | { |
| 116 | struct iommu_dev_data *dev_data; |
| 117 | unsigned long flags; |
| 118 | |
| 119 | spin_lock_irqsave(&dev_data_list_lock, flags); |
| 120 | list_for_each_entry(dev_data, &dev_data_list, dev_data_list) { |
| 121 | if (dev_data->devid == devid) |
| 122 | goto out_unlock; |
| 123 | } |
| 124 | |
| 125 | dev_data = NULL; |
| 126 | |
| 127 | out_unlock: |
| 128 | spin_unlock_irqrestore(&dev_data_list_lock, flags); |
| 129 | |
| 130 | return dev_data; |
| 131 | } |
| 132 | |
| 133 | static struct iommu_dev_data *find_dev_data(u16 devid) |
| 134 | { |
| 135 | struct iommu_dev_data *dev_data; |
| 136 | |
| 137 | dev_data = search_dev_data(devid); |
| 138 | |
| 139 | if (dev_data == NULL) |
| 140 | dev_data = alloc_dev_data(devid); |
| 141 | |
| 142 | return dev_data; |
| 143 | } |
| 144 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 145 | static inline u16 get_device_id(struct device *dev) |
| 146 | { |
| 147 | struct pci_dev *pdev = to_pci_dev(dev); |
| 148 | |
| 149 | return calc_devid(pdev->bus->number, pdev->devfn); |
| 150 | } |
| 151 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 152 | static struct iommu_dev_data *get_dev_data(struct device *dev) |
| 153 | { |
| 154 | return dev->archdata.iommu; |
| 155 | } |
| 156 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 157 | static bool pci_iommuv2_capable(struct pci_dev *pdev) |
| 158 | { |
| 159 | static const int caps[] = { |
| 160 | PCI_EXT_CAP_ID_ATS, |
| 161 | PCI_PRI_CAP, |
| 162 | PCI_PASID_CAP, |
| 163 | }; |
| 164 | int i, pos; |
| 165 | |
| 166 | for (i = 0; i < 3; ++i) { |
| 167 | pos = pci_find_ext_capability(pdev, caps[i]); |
| 168 | if (pos == 0) |
| 169 | return false; |
| 170 | } |
| 171 | |
| 172 | return true; |
| 173 | } |
| 174 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 175 | static bool pdev_pri_erratum(struct pci_dev *pdev, u32 erratum) |
| 176 | { |
| 177 | struct iommu_dev_data *dev_data; |
| 178 | |
| 179 | dev_data = get_dev_data(&pdev->dev); |
| 180 | |
| 181 | return dev_data->errata & (1 << erratum) ? true : false; |
| 182 | } |
| 183 | |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 184 | /* |
| 185 | * In this function the list of preallocated protection domains is traversed to |
| 186 | * find the domain for a specific device |
| 187 | */ |
| 188 | static struct dma_ops_domain *find_protection_domain(u16 devid) |
| 189 | { |
| 190 | struct dma_ops_domain *entry, *ret = NULL; |
| 191 | unsigned long flags; |
| 192 | u16 alias = amd_iommu_alias_table[devid]; |
| 193 | |
| 194 | if (list_empty(&iommu_pd_list)) |
| 195 | return NULL; |
| 196 | |
| 197 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 198 | |
| 199 | list_for_each_entry(entry, &iommu_pd_list, list) { |
| 200 | if (entry->target_dev == devid || |
| 201 | entry->target_dev == alias) { |
| 202 | ret = entry; |
| 203 | break; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 208 | |
| 209 | return ret; |
| 210 | } |
| 211 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 212 | /* |
| 213 | * This function checks if the driver got a valid device from the caller to |
| 214 | * avoid dereferencing invalid pointers. |
| 215 | */ |
| 216 | static bool check_device(struct device *dev) |
| 217 | { |
| 218 | u16 devid; |
| 219 | |
| 220 | if (!dev || !dev->dma_mask) |
| 221 | return false; |
| 222 | |
| 223 | /* No device or no PCI device */ |
Julia Lawall | 339d326 | 2010-02-06 09:42:39 +0100 | [diff] [blame] | 224 | if (dev->bus != &pci_bus_type) |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 225 | return false; |
| 226 | |
| 227 | devid = get_device_id(dev); |
| 228 | |
| 229 | /* Out of our scope? */ |
| 230 | if (devid > amd_iommu_last_bdf) |
| 231 | return false; |
| 232 | |
| 233 | if (amd_iommu_rlookup_table[devid] == NULL) |
| 234 | return false; |
| 235 | |
| 236 | return true; |
| 237 | } |
| 238 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 239 | static int iommu_init_device(struct device *dev) |
| 240 | { |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 241 | struct pci_dev *pdev = to_pci_dev(dev); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 242 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 243 | u16 alias; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 244 | |
| 245 | if (dev->archdata.iommu) |
| 246 | return 0; |
| 247 | |
Joerg Roedel | 3b03bb7 | 2011-06-09 18:53:25 +0200 | [diff] [blame] | 248 | dev_data = find_dev_data(get_device_id(dev)); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 249 | if (!dev_data) |
| 250 | return -ENOMEM; |
| 251 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 252 | alias = amd_iommu_alias_table[dev_data->devid]; |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 253 | if (alias != dev_data->devid) { |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 254 | struct iommu_dev_data *alias_data; |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 255 | |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 256 | alias_data = find_dev_data(alias); |
| 257 | if (alias_data == NULL) { |
| 258 | pr_err("AMD-Vi: Warning: Unhandled device %s\n", |
| 259 | dev_name(dev)); |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 260 | free_dev_data(dev_data); |
| 261 | return -ENOTSUPP; |
| 262 | } |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 263 | dev_data->alias_data = alias_data; |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 264 | } |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 265 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 266 | if (pci_iommuv2_capable(pdev)) { |
| 267 | struct amd_iommu *iommu; |
| 268 | |
| 269 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 270 | dev_data->iommu_v2 = iommu->is_iommu_v2; |
| 271 | } |
| 272 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 273 | dev->archdata.iommu = dev_data; |
| 274 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 275 | return 0; |
| 276 | } |
| 277 | |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 278 | static void iommu_ignore_device(struct device *dev) |
| 279 | { |
| 280 | u16 devid, alias; |
| 281 | |
| 282 | devid = get_device_id(dev); |
| 283 | alias = amd_iommu_alias_table[devid]; |
| 284 | |
| 285 | memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry)); |
| 286 | memset(&amd_iommu_dev_table[alias], 0, sizeof(struct dev_table_entry)); |
| 287 | |
| 288 | amd_iommu_rlookup_table[devid] = NULL; |
| 289 | amd_iommu_rlookup_table[alias] = NULL; |
| 290 | } |
| 291 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 292 | static void iommu_uninit_device(struct device *dev) |
| 293 | { |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 294 | /* |
| 295 | * Nothing to do here - we keep dev_data around for unplugged devices |
| 296 | * and reuse it when the device is re-plugged - not doing so would |
| 297 | * introduce a ton of races. |
| 298 | */ |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 299 | } |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 300 | |
| 301 | void __init amd_iommu_uninit_devices(void) |
| 302 | { |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 303 | struct iommu_dev_data *dev_data, *n; |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 304 | struct pci_dev *pdev = NULL; |
| 305 | |
| 306 | for_each_pci_dev(pdev) { |
| 307 | |
| 308 | if (!check_device(&pdev->dev)) |
| 309 | continue; |
| 310 | |
| 311 | iommu_uninit_device(&pdev->dev); |
| 312 | } |
Joerg Roedel | 8fa5f80 | 2011-06-09 12:24:45 +0200 | [diff] [blame] | 313 | |
| 314 | /* Free all of our dev_data structures */ |
| 315 | list_for_each_entry_safe(dev_data, n, &dev_data_list, dev_data_list) |
| 316 | free_dev_data(dev_data); |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | int __init amd_iommu_init_devices(void) |
| 320 | { |
| 321 | struct pci_dev *pdev = NULL; |
| 322 | int ret = 0; |
| 323 | |
| 324 | for_each_pci_dev(pdev) { |
| 325 | |
| 326 | if (!check_device(&pdev->dev)) |
| 327 | continue; |
| 328 | |
| 329 | ret = iommu_init_device(&pdev->dev); |
Joerg Roedel | 2601887 | 2011-06-06 16:50:14 +0200 | [diff] [blame] | 330 | if (ret == -ENOTSUPP) |
| 331 | iommu_ignore_device(&pdev->dev); |
| 332 | else if (ret) |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 333 | goto out_free; |
| 334 | } |
| 335 | |
| 336 | return 0; |
| 337 | |
| 338 | out_free: |
| 339 | |
| 340 | amd_iommu_uninit_devices(); |
| 341 | |
| 342 | return ret; |
| 343 | } |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 344 | #ifdef CONFIG_AMD_IOMMU_STATS |
| 345 | |
| 346 | /* |
| 347 | * Initialization code for statistics collection |
| 348 | */ |
| 349 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 350 | DECLARE_STATS_COUNTER(compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 351 | DECLARE_STATS_COUNTER(cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 352 | DECLARE_STATS_COUNTER(cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 353 | DECLARE_STATS_COUNTER(cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 354 | DECLARE_STATS_COUNTER(cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 355 | DECLARE_STATS_COUNTER(cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 356 | DECLARE_STATS_COUNTER(cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 357 | DECLARE_STATS_COUNTER(cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 358 | DECLARE_STATS_COUNTER(domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 359 | DECLARE_STATS_COUNTER(domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 360 | DECLARE_STATS_COUNTER(alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 361 | DECLARE_STATS_COUNTER(total_map_requests); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 362 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 363 | static struct dentry *stats_dir; |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 364 | static struct dentry *de_fflush; |
| 365 | |
| 366 | static void amd_iommu_stats_add(struct __iommu_counter *cnt) |
| 367 | { |
| 368 | if (stats_dir == NULL) |
| 369 | return; |
| 370 | |
| 371 | cnt->dent = debugfs_create_u64(cnt->name, 0444, stats_dir, |
| 372 | &cnt->value); |
| 373 | } |
| 374 | |
| 375 | static void amd_iommu_stats_init(void) |
| 376 | { |
| 377 | stats_dir = debugfs_create_dir("amd-iommu", NULL); |
| 378 | if (stats_dir == NULL) |
| 379 | return; |
| 380 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 381 | de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir, |
| 382 | (u32 *)&amd_iommu_unmap_flush); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 383 | |
| 384 | amd_iommu_stats_add(&compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 385 | amd_iommu_stats_add(&cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 386 | amd_iommu_stats_add(&cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 387 | amd_iommu_stats_add(&cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 388 | amd_iommu_stats_add(&cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 389 | amd_iommu_stats_add(&cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 390 | amd_iommu_stats_add(&cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 391 | amd_iommu_stats_add(&cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 392 | amd_iommu_stats_add(&domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 393 | amd_iommu_stats_add(&domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 394 | amd_iommu_stats_add(&alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 395 | amd_iommu_stats_add(&total_map_requests); |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | #endif |
| 399 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 400 | /**************************************************************************** |
| 401 | * |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 402 | * Interrupt handling functions |
| 403 | * |
| 404 | ****************************************************************************/ |
| 405 | |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 406 | static void dump_dte_entry(u16 devid) |
| 407 | { |
| 408 | int i; |
| 409 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 410 | for (i = 0; i < 4; ++i) |
| 411 | pr_err("AMD-Vi: DTE[%d]: %016llx\n", i, |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 412 | amd_iommu_dev_table[devid].data[i]); |
| 413 | } |
| 414 | |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 415 | static void dump_command(unsigned long phys_addr) |
| 416 | { |
| 417 | struct iommu_cmd *cmd = phys_to_virt(phys_addr); |
| 418 | int i; |
| 419 | |
| 420 | for (i = 0; i < 4; ++i) |
| 421 | pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); |
| 422 | } |
| 423 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 424 | static void iommu_print_event(struct amd_iommu *iommu, void *__evt) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 425 | { |
| 426 | u32 *event = __evt; |
| 427 | int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; |
| 428 | int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; |
| 429 | int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; |
| 430 | int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; |
| 431 | u64 address = (u64)(((u64)event[3]) << 32) | event[2]; |
| 432 | |
Joerg Roedel | 4c6f40d | 2009-09-01 16:43:58 +0200 | [diff] [blame] | 433 | printk(KERN_ERR "AMD-Vi: Event logged ["); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 434 | |
| 435 | switch (type) { |
| 436 | case EVENT_TYPE_ILL_DEV: |
| 437 | printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " |
| 438 | "address=0x%016llx flags=0x%04x]\n", |
| 439 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 440 | address, flags); |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 441 | dump_dte_entry(devid); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 442 | break; |
| 443 | case EVENT_TYPE_IO_FAULT: |
| 444 | printk("IO_PAGE_FAULT device=%02x:%02x.%x " |
| 445 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 446 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 447 | domid, address, flags); |
| 448 | break; |
| 449 | case EVENT_TYPE_DEV_TAB_ERR: |
| 450 | printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 451 | "address=0x%016llx flags=0x%04x]\n", |
| 452 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 453 | address, flags); |
| 454 | break; |
| 455 | case EVENT_TYPE_PAGE_TAB_ERR: |
| 456 | printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 457 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 458 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 459 | domid, address, flags); |
| 460 | break; |
| 461 | case EVENT_TYPE_ILL_CMD: |
| 462 | printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 463 | dump_command(address); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 464 | break; |
| 465 | case EVENT_TYPE_CMD_HARD_ERR: |
| 466 | printk("COMMAND_HARDWARE_ERROR address=0x%016llx " |
| 467 | "flags=0x%04x]\n", address, flags); |
| 468 | break; |
| 469 | case EVENT_TYPE_IOTLB_INV_TO: |
| 470 | printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " |
| 471 | "address=0x%016llx]\n", |
| 472 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 473 | address); |
| 474 | break; |
| 475 | case EVENT_TYPE_INV_DEV_REQ: |
| 476 | printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " |
| 477 | "address=0x%016llx flags=0x%04x]\n", |
| 478 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 479 | address, flags); |
| 480 | break; |
| 481 | default: |
| 482 | printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | static void iommu_poll_events(struct amd_iommu *iommu) |
| 487 | { |
| 488 | u32 head, tail; |
| 489 | unsigned long flags; |
| 490 | |
| 491 | spin_lock_irqsave(&iommu->lock, flags); |
| 492 | |
| 493 | head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 494 | tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); |
| 495 | |
| 496 | while (head != tail) { |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 497 | iommu_print_event(iommu, iommu->evt_buf + head); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 498 | head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; |
| 499 | } |
| 500 | |
| 501 | writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 502 | |
| 503 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 504 | } |
| 505 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 506 | static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u32 head) |
| 507 | { |
| 508 | struct amd_iommu_fault fault; |
| 509 | volatile u64 *raw; |
| 510 | int i; |
| 511 | |
| 512 | raw = (u64 *)(iommu->ppr_log + head); |
| 513 | |
| 514 | /* |
| 515 | * Hardware bug: Interrupt may arrive before the entry is written to |
| 516 | * memory. If this happens we need to wait for the entry to arrive. |
| 517 | */ |
| 518 | for (i = 0; i < LOOP_TIMEOUT; ++i) { |
| 519 | if (PPR_REQ_TYPE(raw[0]) != 0) |
| 520 | break; |
| 521 | udelay(1); |
| 522 | } |
| 523 | |
| 524 | if (PPR_REQ_TYPE(raw[0]) != PPR_REQ_FAULT) { |
| 525 | pr_err_ratelimited("AMD-Vi: Unknown PPR request received\n"); |
| 526 | return; |
| 527 | } |
| 528 | |
| 529 | fault.address = raw[1]; |
| 530 | fault.pasid = PPR_PASID(raw[0]); |
| 531 | fault.device_id = PPR_DEVID(raw[0]); |
| 532 | fault.tag = PPR_TAG(raw[0]); |
| 533 | fault.flags = PPR_FLAGS(raw[0]); |
| 534 | |
| 535 | /* |
| 536 | * To detect the hardware bug we need to clear the entry |
| 537 | * to back to zero. |
| 538 | */ |
| 539 | raw[0] = raw[1] = 0; |
| 540 | |
| 541 | atomic_notifier_call_chain(&ppr_notifier, 0, &fault); |
| 542 | } |
| 543 | |
| 544 | static void iommu_poll_ppr_log(struct amd_iommu *iommu) |
| 545 | { |
| 546 | unsigned long flags; |
| 547 | u32 head, tail; |
| 548 | |
| 549 | if (iommu->ppr_log == NULL) |
| 550 | return; |
| 551 | |
| 552 | spin_lock_irqsave(&iommu->lock, flags); |
| 553 | |
| 554 | head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); |
| 555 | tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); |
| 556 | |
| 557 | while (head != tail) { |
| 558 | |
| 559 | /* Handle PPR entry */ |
| 560 | iommu_handle_ppr_entry(iommu, head); |
| 561 | |
| 562 | /* Update and refresh ring-buffer state*/ |
| 563 | head = (head + PPR_ENTRY_SIZE) % PPR_LOG_SIZE; |
| 564 | writel(head, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); |
| 565 | tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); |
| 566 | } |
| 567 | |
| 568 | /* enable ppr interrupts again */ |
| 569 | writel(MMIO_STATUS_PPR_INT_MASK, iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 570 | |
| 571 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 572 | } |
| 573 | |
Joerg Roedel | 72fe00f | 2011-05-10 10:50:42 +0200 | [diff] [blame] | 574 | irqreturn_t amd_iommu_int_thread(int irq, void *data) |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 575 | { |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 576 | struct amd_iommu *iommu; |
| 577 | |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 578 | for_each_iommu(iommu) { |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 579 | iommu_poll_events(iommu); |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 580 | iommu_poll_ppr_log(iommu); |
| 581 | } |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 582 | |
| 583 | return IRQ_HANDLED; |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 584 | } |
| 585 | |
Joerg Roedel | 72fe00f | 2011-05-10 10:50:42 +0200 | [diff] [blame] | 586 | irqreturn_t amd_iommu_int_handler(int irq, void *data) |
| 587 | { |
| 588 | return IRQ_WAKE_THREAD; |
| 589 | } |
| 590 | |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 591 | /**************************************************************************** |
| 592 | * |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 593 | * IOMMU command queuing functions |
| 594 | * |
| 595 | ****************************************************************************/ |
| 596 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 597 | static int wait_on_sem(volatile u64 *sem) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 598 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 599 | int i = 0; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 600 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 601 | while (*sem == 0 && i < LOOP_TIMEOUT) { |
| 602 | udelay(1); |
| 603 | i += 1; |
| 604 | } |
| 605 | |
| 606 | if (i == LOOP_TIMEOUT) { |
| 607 | pr_alert("AMD-Vi: Completion-Wait loop timed out\n"); |
| 608 | return -EIO; |
| 609 | } |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 614 | static void copy_cmd_to_buffer(struct amd_iommu *iommu, |
| 615 | struct iommu_cmd *cmd, |
| 616 | u32 tail) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 617 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 618 | u8 *target; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 619 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 620 | target = iommu->cmd_buf + tail; |
| 621 | tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 622 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 623 | /* Copy command to buffer */ |
| 624 | memcpy(target, cmd, sizeof(*cmd)); |
| 625 | |
| 626 | /* Tell the IOMMU about it */ |
| 627 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 628 | } |
| 629 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 630 | static void build_completion_wait(struct iommu_cmd *cmd, u64 address) |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 631 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 632 | WARN_ON(address & 0x7ULL); |
| 633 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 634 | memset(cmd, 0, sizeof(*cmd)); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 635 | cmd->data[0] = lower_32_bits(__pa(address)) | CMD_COMPL_WAIT_STORE_MASK; |
| 636 | cmd->data[1] = upper_32_bits(__pa(address)); |
| 637 | cmd->data[2] = 1; |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 638 | CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); |
| 639 | } |
| 640 | |
Joerg Roedel | 94fe79e | 2011-04-06 11:07:21 +0200 | [diff] [blame] | 641 | static void build_inv_dte(struct iommu_cmd *cmd, u16 devid) |
| 642 | { |
| 643 | memset(cmd, 0, sizeof(*cmd)); |
| 644 | cmd->data[0] = devid; |
| 645 | CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY); |
| 646 | } |
| 647 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 648 | static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 649 | size_t size, u16 domid, int pde) |
| 650 | { |
| 651 | u64 pages; |
| 652 | int s; |
| 653 | |
| 654 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
| 655 | s = 0; |
| 656 | |
| 657 | if (pages > 1) { |
| 658 | /* |
| 659 | * If we have to flush more than one page, flush all |
| 660 | * TLB entries for this domain |
| 661 | */ |
| 662 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 663 | s = 1; |
| 664 | } |
| 665 | |
| 666 | address &= PAGE_MASK; |
| 667 | |
| 668 | memset(cmd, 0, sizeof(*cmd)); |
| 669 | cmd->data[1] |= domid; |
| 670 | cmd->data[2] = lower_32_bits(address); |
| 671 | cmd->data[3] = upper_32_bits(address); |
| 672 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 673 | if (s) /* size bit - we flush more than one 4kb page */ |
| 674 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 675 | if (pde) /* PDE bit - we wan't flush everything not only the PTEs */ |
| 676 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 677 | } |
| 678 | |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 679 | static void build_inv_iotlb_pages(struct iommu_cmd *cmd, u16 devid, int qdep, |
| 680 | u64 address, size_t size) |
| 681 | { |
| 682 | u64 pages; |
| 683 | int s; |
| 684 | |
| 685 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
| 686 | s = 0; |
| 687 | |
| 688 | if (pages > 1) { |
| 689 | /* |
| 690 | * If we have to flush more than one page, flush all |
| 691 | * TLB entries for this domain |
| 692 | */ |
| 693 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 694 | s = 1; |
| 695 | } |
| 696 | |
| 697 | address &= PAGE_MASK; |
| 698 | |
| 699 | memset(cmd, 0, sizeof(*cmd)); |
| 700 | cmd->data[0] = devid; |
| 701 | cmd->data[0] |= (qdep & 0xff) << 24; |
| 702 | cmd->data[1] = devid; |
| 703 | cmd->data[2] = lower_32_bits(address); |
| 704 | cmd->data[3] = upper_32_bits(address); |
| 705 | CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES); |
| 706 | if (s) |
| 707 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 708 | } |
| 709 | |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 710 | static void build_inv_iommu_pasid(struct iommu_cmd *cmd, u16 domid, int pasid, |
| 711 | u64 address, bool size) |
| 712 | { |
| 713 | memset(cmd, 0, sizeof(*cmd)); |
| 714 | |
| 715 | address &= ~(0xfffULL); |
| 716 | |
| 717 | cmd->data[0] = pasid & PASID_MASK; |
| 718 | cmd->data[1] = domid; |
| 719 | cmd->data[2] = lower_32_bits(address); |
| 720 | cmd->data[3] = upper_32_bits(address); |
| 721 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 722 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; |
| 723 | if (size) |
| 724 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 725 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 726 | } |
| 727 | |
| 728 | static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid, |
| 729 | int qdep, u64 address, bool size) |
| 730 | { |
| 731 | memset(cmd, 0, sizeof(*cmd)); |
| 732 | |
| 733 | address &= ~(0xfffULL); |
| 734 | |
| 735 | cmd->data[0] = devid; |
| 736 | cmd->data[0] |= (pasid & 0xff) << 16; |
| 737 | cmd->data[0] |= (qdep & 0xff) << 24; |
| 738 | cmd->data[1] = devid; |
| 739 | cmd->data[1] |= ((pasid >> 8) & 0xfff) << 16; |
| 740 | cmd->data[2] = lower_32_bits(address); |
| 741 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; |
| 742 | cmd->data[3] = upper_32_bits(address); |
| 743 | if (size) |
| 744 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 745 | CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES); |
| 746 | } |
| 747 | |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 748 | static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid, |
| 749 | int status, int tag, bool gn) |
| 750 | { |
| 751 | memset(cmd, 0, sizeof(*cmd)); |
| 752 | |
| 753 | cmd->data[0] = devid; |
| 754 | if (gn) { |
| 755 | cmd->data[1] = pasid & PASID_MASK; |
| 756 | cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK; |
| 757 | } |
| 758 | cmd->data[3] = tag & 0x1ff; |
| 759 | cmd->data[3] |= (status & PPR_STATUS_MASK) << PPR_STATUS_SHIFT; |
| 760 | |
| 761 | CMD_SET_TYPE(cmd, CMD_COMPLETE_PPR); |
| 762 | } |
| 763 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 764 | static void build_inv_all(struct iommu_cmd *cmd) |
| 765 | { |
| 766 | memset(cmd, 0, sizeof(*cmd)); |
| 767 | CMD_SET_TYPE(cmd, CMD_INV_ALL); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 768 | } |
| 769 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 770 | /* |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 771 | * Writes the command to the IOMMUs command buffer and informs the |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 772 | * hardware about the new command. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 773 | */ |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 774 | static int iommu_queue_command_sync(struct amd_iommu *iommu, |
| 775 | struct iommu_cmd *cmd, |
| 776 | bool sync) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 777 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 778 | u32 left, tail, head, next_tail; |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 779 | unsigned long flags; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 780 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 781 | WARN_ON(iommu->cmd_buf_size & CMD_BUFFER_UNINITIALIZED); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 782 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 783 | again: |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 784 | spin_lock_irqsave(&iommu->lock, flags); |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 785 | |
| 786 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 787 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 788 | next_tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 789 | left = (head - next_tail) % iommu->cmd_buf_size; |
| 790 | |
| 791 | if (left <= 2) { |
| 792 | struct iommu_cmd sync_cmd; |
| 793 | volatile u64 sem = 0; |
| 794 | int ret; |
| 795 | |
| 796 | build_completion_wait(&sync_cmd, (u64)&sem); |
| 797 | copy_cmd_to_buffer(iommu, &sync_cmd, tail); |
| 798 | |
| 799 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 800 | |
| 801 | if ((ret = wait_on_sem(&sem)) != 0) |
| 802 | return ret; |
| 803 | |
| 804 | goto again; |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 805 | } |
| 806 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 807 | copy_cmd_to_buffer(iommu, cmd, tail); |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 808 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 809 | /* We need to sync now to make sure all commands are processed */ |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 810 | iommu->need_sync = sync; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 811 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 812 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 813 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 814 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 815 | } |
| 816 | |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 817 | static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) |
| 818 | { |
| 819 | return iommu_queue_command_sync(iommu, cmd, true); |
| 820 | } |
| 821 | |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 822 | /* |
| 823 | * This function queues a completion wait command into the command |
| 824 | * buffer of an IOMMU |
| 825 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 826 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 827 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 828 | struct iommu_cmd cmd; |
| 829 | volatile u64 sem = 0; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 830 | int ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 831 | |
| 832 | if (!iommu->need_sync) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 833 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 834 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 835 | build_completion_wait(&cmd, (u64)&sem); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 836 | |
Joerg Roedel | f1ca151 | 2011-09-02 14:10:32 +0200 | [diff] [blame] | 837 | ret = iommu_queue_command_sync(iommu, &cmd, false); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 838 | if (ret) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 839 | return ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 840 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 841 | return wait_on_sem(&sem); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 842 | } |
| 843 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 844 | static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 845 | { |
| 846 | struct iommu_cmd cmd; |
| 847 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 848 | build_inv_dte(&cmd, devid); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 849 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 850 | return iommu_queue_command(iommu, &cmd); |
| 851 | } |
| 852 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 853 | static void iommu_flush_dte_all(struct amd_iommu *iommu) |
| 854 | { |
| 855 | u32 devid; |
| 856 | |
| 857 | for (devid = 0; devid <= 0xffff; ++devid) |
| 858 | iommu_flush_dte(iommu, devid); |
| 859 | |
| 860 | iommu_completion_wait(iommu); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | /* |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 864 | * This function uses heavy locking and may disable irqs for some time. But |
| 865 | * this is no issue because it is only called during resume. |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 866 | */ |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 867 | static void iommu_flush_tlb_all(struct amd_iommu *iommu) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 868 | { |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 869 | u32 dom_id; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 870 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 871 | for (dom_id = 0; dom_id <= 0xffff; ++dom_id) { |
| 872 | struct iommu_cmd cmd; |
| 873 | build_inv_iommu_pages(&cmd, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, |
| 874 | dom_id, 1); |
| 875 | iommu_queue_command(iommu, &cmd); |
| 876 | } |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 877 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 878 | iommu_completion_wait(iommu); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 879 | } |
| 880 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 881 | static void iommu_flush_all(struct amd_iommu *iommu) |
| 882 | { |
| 883 | struct iommu_cmd cmd; |
| 884 | |
| 885 | build_inv_all(&cmd); |
| 886 | |
| 887 | iommu_queue_command(iommu, &cmd); |
| 888 | iommu_completion_wait(iommu); |
| 889 | } |
| 890 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 891 | void iommu_flush_all_caches(struct amd_iommu *iommu) |
| 892 | { |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame] | 893 | if (iommu_feature(iommu, FEATURE_IA)) { |
| 894 | iommu_flush_all(iommu); |
| 895 | } else { |
| 896 | iommu_flush_dte_all(iommu); |
| 897 | iommu_flush_tlb_all(iommu); |
| 898 | } |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 899 | } |
| 900 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 901 | /* |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 902 | * Command send function for flushing on-device TLB |
| 903 | */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 904 | static int device_flush_iotlb(struct iommu_dev_data *dev_data, |
| 905 | u64 address, size_t size) |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 906 | { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 907 | struct amd_iommu *iommu; |
| 908 | struct iommu_cmd cmd; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 909 | int qdep; |
| 910 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 911 | qdep = dev_data->ats.qdep; |
| 912 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 913 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 914 | build_inv_iotlb_pages(&cmd, dev_data->devid, qdep, address, size); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 915 | |
| 916 | return iommu_queue_command(iommu, &cmd); |
| 917 | } |
| 918 | |
| 919 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 920 | * Command send function for invalidating a device table entry |
| 921 | */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 922 | static int device_flush_dte(struct iommu_dev_data *dev_data) |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 923 | { |
| 924 | struct amd_iommu *iommu; |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 925 | int ret; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 926 | |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 927 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 928 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 929 | ret = iommu_flush_dte(iommu, dev_data->devid); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 930 | if (ret) |
| 931 | return ret; |
| 932 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 933 | if (dev_data->ats.enabled) |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 934 | ret = device_flush_iotlb(dev_data, 0, ~0UL); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 935 | |
| 936 | return ret; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 937 | } |
| 938 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 939 | /* |
| 940 | * TLB invalidation function which is called from the mapping functions. |
| 941 | * It invalidates a single PTE if the range to flush is within a single |
| 942 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 943 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 944 | static void __domain_flush_pages(struct protection_domain *domain, |
| 945 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 946 | { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 947 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 948 | struct iommu_cmd cmd; |
| 949 | int ret = 0, i; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 950 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 951 | build_inv_iommu_pages(&cmd, address, size, domain->id, pde); |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 952 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 953 | for (i = 0; i < amd_iommus_present; ++i) { |
| 954 | if (!domain->dev_iommu[i]) |
| 955 | continue; |
| 956 | |
| 957 | /* |
| 958 | * Devices of this domain are behind this IOMMU |
| 959 | * We need a TLB flush |
| 960 | */ |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 961 | ret |= iommu_queue_command(amd_iommus[i], &cmd); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 962 | } |
| 963 | |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 964 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 965 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 966 | if (!dev_data->ats.enabled) |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 967 | continue; |
| 968 | |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 969 | ret |= device_flush_iotlb(dev_data, address, size); |
Joerg Roedel | cb41ed8 | 2011-04-05 11:00:53 +0200 | [diff] [blame] | 970 | } |
| 971 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 972 | WARN_ON(ret); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 973 | } |
| 974 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 975 | static void domain_flush_pages(struct protection_domain *domain, |
| 976 | u64 address, size_t size) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 977 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 978 | __domain_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 979 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 980 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 981 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 982 | static void domain_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 983 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 984 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 985 | } |
| 986 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 987 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 988 | static void domain_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 989 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 990 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
| 991 | } |
| 992 | |
| 993 | static void domain_flush_complete(struct protection_domain *domain) |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 994 | { |
| 995 | int i; |
| 996 | |
| 997 | for (i = 0; i < amd_iommus_present; ++i) { |
| 998 | if (!domain->dev_iommu[i]) |
| 999 | continue; |
| 1000 | |
| 1001 | /* |
| 1002 | * Devices of this domain are behind this IOMMU |
| 1003 | * We need to wait for completion of all commands. |
| 1004 | */ |
| 1005 | iommu_completion_wait(amd_iommus[i]); |
| 1006 | } |
| 1007 | } |
| 1008 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1009 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 1010 | /* |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1011 | * This function flushes the DTEs for all devices in domain |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 1012 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1013 | static void domain_flush_devices(struct protection_domain *domain) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 1014 | { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1015 | struct iommu_dev_data *dev_data; |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1016 | |
| 1017 | list_for_each_entry(dev_data, &domain->dev_list, list) |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1018 | device_flush_dte(dev_data); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1019 | } |
| 1020 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1021 | /**************************************************************************** |
| 1022 | * |
| 1023 | * The functions below are used the create the page table mappings for |
| 1024 | * unity mapped regions. |
| 1025 | * |
| 1026 | ****************************************************************************/ |
| 1027 | |
| 1028 | /* |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1029 | * This function is used to add another level to an IO page table. Adding |
| 1030 | * another level increases the size of the address space by 9 bits to a size up |
| 1031 | * to 64 bits. |
| 1032 | */ |
| 1033 | static bool increase_address_space(struct protection_domain *domain, |
| 1034 | gfp_t gfp) |
| 1035 | { |
| 1036 | u64 *pte; |
| 1037 | |
| 1038 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 1039 | /* address space already 64 bit large */ |
| 1040 | return false; |
| 1041 | |
| 1042 | pte = (void *)get_zeroed_page(gfp); |
| 1043 | if (!pte) |
| 1044 | return false; |
| 1045 | |
| 1046 | *pte = PM_LEVEL_PDE(domain->mode, |
| 1047 | virt_to_phys(domain->pt_root)); |
| 1048 | domain->pt_root = pte; |
| 1049 | domain->mode += 1; |
| 1050 | domain->updated = true; |
| 1051 | |
| 1052 | return true; |
| 1053 | } |
| 1054 | |
| 1055 | static u64 *alloc_pte(struct protection_domain *domain, |
| 1056 | unsigned long address, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1057 | unsigned long page_size, |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1058 | u64 **pte_page, |
| 1059 | gfp_t gfp) |
| 1060 | { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1061 | int level, end_lvl; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1062 | u64 *pte, *page; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1063 | |
| 1064 | BUG_ON(!is_power_of_2(page_size)); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1065 | |
| 1066 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 1067 | increase_address_space(domain, gfp); |
| 1068 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1069 | level = domain->mode - 1; |
| 1070 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 1071 | address = PAGE_SIZE_ALIGN(address, page_size); |
| 1072 | end_lvl = PAGE_SIZE_LEVEL(page_size); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1073 | |
| 1074 | while (level > end_lvl) { |
| 1075 | if (!IOMMU_PTE_PRESENT(*pte)) { |
| 1076 | page = (u64 *)get_zeroed_page(gfp); |
| 1077 | if (!page) |
| 1078 | return NULL; |
| 1079 | *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 1080 | } |
| 1081 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1082 | /* No level skipping support yet */ |
| 1083 | if (PM_PTE_LEVEL(*pte) != level) |
| 1084 | return NULL; |
| 1085 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1086 | level -= 1; |
| 1087 | |
| 1088 | pte = IOMMU_PTE_PAGE(*pte); |
| 1089 | |
| 1090 | if (pte_page && level == end_lvl) |
| 1091 | *pte_page = pte; |
| 1092 | |
| 1093 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 1094 | } |
| 1095 | |
| 1096 | return pte; |
| 1097 | } |
| 1098 | |
| 1099 | /* |
| 1100 | * This function checks if there is a PTE for a given dma address. If |
| 1101 | * there is one, it returns the pointer to it. |
| 1102 | */ |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1103 | static u64 *fetch_pte(struct protection_domain *domain, unsigned long address) |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1104 | { |
| 1105 | int level; |
| 1106 | u64 *pte; |
| 1107 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1108 | if (address > PM_LEVEL_SIZE(domain->mode)) |
| 1109 | return NULL; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1110 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1111 | level = domain->mode - 1; |
| 1112 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 1113 | |
| 1114 | while (level > 0) { |
| 1115 | |
| 1116 | /* Not Present */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1117 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 1118 | return NULL; |
| 1119 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1120 | /* Large PTE */ |
| 1121 | if (PM_PTE_LEVEL(*pte) == 0x07) { |
| 1122 | unsigned long pte_mask, __pte; |
| 1123 | |
| 1124 | /* |
| 1125 | * If we have a series of large PTEs, make |
| 1126 | * sure to return a pointer to the first one. |
| 1127 | */ |
| 1128 | pte_mask = PTE_PAGE_SIZE(*pte); |
| 1129 | pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1); |
| 1130 | __pte = ((unsigned long)pte) & pte_mask; |
| 1131 | |
| 1132 | return (u64 *)__pte; |
| 1133 | } |
| 1134 | |
| 1135 | /* No level skipping support yet */ |
| 1136 | if (PM_PTE_LEVEL(*pte) != level) |
| 1137 | return NULL; |
| 1138 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1139 | level -= 1; |
| 1140 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1141 | /* Walk to the next level */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1142 | pte = IOMMU_PTE_PAGE(*pte); |
| 1143 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | return pte; |
| 1147 | } |
| 1148 | |
| 1149 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1150 | * Generic mapping functions. It maps a physical address into a DMA |
| 1151 | * address space. It allocates the page table pages if necessary. |
| 1152 | * In the future it can be extended to a generic mapping function |
| 1153 | * supporting all features of AMD IOMMU page tables like level skipping |
| 1154 | * and full 64 bit address spaces. |
| 1155 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 1156 | static int iommu_map_page(struct protection_domain *dom, |
| 1157 | unsigned long bus_addr, |
| 1158 | unsigned long phys_addr, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1159 | int prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1160 | unsigned long page_size) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1161 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1162 | u64 __pte, *pte; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1163 | int i, count; |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1164 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 1165 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1166 | return -EINVAL; |
| 1167 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1168 | bus_addr = PAGE_ALIGN(bus_addr); |
| 1169 | phys_addr = PAGE_ALIGN(phys_addr); |
| 1170 | count = PAGE_SIZE_PTE_COUNT(page_size); |
| 1171 | pte = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1172 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1173 | for (i = 0; i < count; ++i) |
| 1174 | if (IOMMU_PTE_PRESENT(pte[i])) |
| 1175 | return -EBUSY; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1176 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1177 | if (page_size > PAGE_SIZE) { |
| 1178 | __pte = PAGE_SIZE_PTE(phys_addr, page_size); |
| 1179 | __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1180 | } else |
| 1181 | __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1182 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1183 | if (prot & IOMMU_PROT_IR) |
| 1184 | __pte |= IOMMU_PTE_IR; |
| 1185 | if (prot & IOMMU_PROT_IW) |
| 1186 | __pte |= IOMMU_PTE_IW; |
| 1187 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1188 | for (i = 0; i < count; ++i) |
| 1189 | pte[i] = __pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1190 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1191 | update_domain(dom); |
| 1192 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1193 | return 0; |
| 1194 | } |
| 1195 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1196 | static unsigned long iommu_unmap_page(struct protection_domain *dom, |
| 1197 | unsigned long bus_addr, |
| 1198 | unsigned long page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1199 | { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1200 | unsigned long long unmap_size, unmapped; |
| 1201 | u64 *pte; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1202 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1203 | BUG_ON(!is_power_of_2(page_size)); |
| 1204 | |
| 1205 | unmapped = 0; |
| 1206 | |
| 1207 | while (unmapped < page_size) { |
| 1208 | |
| 1209 | pte = fetch_pte(dom, bus_addr); |
| 1210 | |
| 1211 | if (!pte) { |
| 1212 | /* |
| 1213 | * No PTE for this address |
| 1214 | * move forward in 4kb steps |
| 1215 | */ |
| 1216 | unmap_size = PAGE_SIZE; |
| 1217 | } else if (PM_PTE_LEVEL(*pte) == 0) { |
| 1218 | /* 4kb PTE found for this address */ |
| 1219 | unmap_size = PAGE_SIZE; |
| 1220 | *pte = 0ULL; |
| 1221 | } else { |
| 1222 | int count, i; |
| 1223 | |
| 1224 | /* Large PTE found which maps this address */ |
| 1225 | unmap_size = PTE_PAGE_SIZE(*pte); |
| 1226 | count = PAGE_SIZE_PTE_COUNT(unmap_size); |
| 1227 | for (i = 0; i < count; i++) |
| 1228 | pte[i] = 0ULL; |
| 1229 | } |
| 1230 | |
| 1231 | bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size; |
| 1232 | unmapped += unmap_size; |
| 1233 | } |
| 1234 | |
| 1235 | BUG_ON(!is_power_of_2(unmapped)); |
| 1236 | |
| 1237 | return unmapped; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1238 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 1239 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1240 | /* |
| 1241 | * This function checks if a specific unity mapping entry is needed for |
| 1242 | * this specific IOMMU. |
| 1243 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1244 | static int iommu_for_unity_map(struct amd_iommu *iommu, |
| 1245 | struct unity_map_entry *entry) |
| 1246 | { |
| 1247 | u16 bdf, i; |
| 1248 | |
| 1249 | for (i = entry->devid_start; i <= entry->devid_end; ++i) { |
| 1250 | bdf = amd_iommu_alias_table[i]; |
| 1251 | if (amd_iommu_rlookup_table[bdf] == iommu) |
| 1252 | return 1; |
| 1253 | } |
| 1254 | |
| 1255 | return 0; |
| 1256 | } |
| 1257 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1258 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1259 | * This function actually applies the mapping to the page table of the |
| 1260 | * dma_ops domain. |
| 1261 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1262 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 1263 | struct unity_map_entry *e) |
| 1264 | { |
| 1265 | u64 addr; |
| 1266 | int ret; |
| 1267 | |
| 1268 | for (addr = e->address_start; addr < e->address_end; |
| 1269 | addr += PAGE_SIZE) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1270 | ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1271 | PAGE_SIZE); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1272 | if (ret) |
| 1273 | return ret; |
| 1274 | /* |
| 1275 | * if unity mapping is in aperture range mark the page |
| 1276 | * as allocated in the aperture |
| 1277 | */ |
| 1278 | if (addr < dma_dom->aperture_size) |
Joerg Roedel | c323956 | 2009-05-12 10:56:44 +0200 | [diff] [blame] | 1279 | __set_bit(addr >> PAGE_SHIFT, |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1280 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | return 0; |
| 1284 | } |
| 1285 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1286 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 1287 | * Init the unity mappings for a specific IOMMU in the system |
| 1288 | * |
| 1289 | * Basically iterates over all unity mapping entries and applies them to |
| 1290 | * the default domain DMA of that IOMMU if necessary. |
| 1291 | */ |
| 1292 | static int iommu_init_unity_mappings(struct amd_iommu *iommu) |
| 1293 | { |
| 1294 | struct unity_map_entry *entry; |
| 1295 | int ret; |
| 1296 | |
| 1297 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 1298 | if (!iommu_for_unity_map(iommu, entry)) |
| 1299 | continue; |
| 1300 | ret = dma_ops_unity_map(iommu->default_dom, entry); |
| 1301 | if (ret) |
| 1302 | return ret; |
| 1303 | } |
| 1304 | |
| 1305 | return 0; |
| 1306 | } |
| 1307 | |
| 1308 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1309 | * Inits the unity mappings required for a specific device |
| 1310 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 1311 | static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, |
| 1312 | u16 devid) |
| 1313 | { |
| 1314 | struct unity_map_entry *e; |
| 1315 | int ret; |
| 1316 | |
| 1317 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 1318 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 1319 | continue; |
| 1320 | ret = dma_ops_unity_map(dma_dom, e); |
| 1321 | if (ret) |
| 1322 | return ret; |
| 1323 | } |
| 1324 | |
| 1325 | return 0; |
| 1326 | } |
| 1327 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1328 | /**************************************************************************** |
| 1329 | * |
| 1330 | * The next functions belong to the address allocator for the dma_ops |
| 1331 | * interface functions. They work like the allocators in the other IOMMU |
| 1332 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 1333 | * the aperture. Maybe it could be enhanced in the future to a more |
| 1334 | * efficient allocator. |
| 1335 | * |
| 1336 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1337 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1338 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1339 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1340 | * |
| 1341 | * called with domain->lock held |
| 1342 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1343 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1344 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 1345 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 1346 | * ranges. |
| 1347 | */ |
| 1348 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 1349 | unsigned long start_page, |
| 1350 | unsigned int pages) |
| 1351 | { |
| 1352 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
| 1353 | |
| 1354 | if (start_page + pages > last_page) |
| 1355 | pages = last_page - start_page; |
| 1356 | |
| 1357 | for (i = start_page; i < start_page + pages; ++i) { |
| 1358 | int index = i / APERTURE_RANGE_PAGES; |
| 1359 | int page = i % APERTURE_RANGE_PAGES; |
| 1360 | __set_bit(page, dom->aperture[index]->bitmap); |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1365 | * This function is used to add a new aperture range to an existing |
| 1366 | * aperture in case of dma_ops domain allocation or address allocation |
| 1367 | * failure. |
| 1368 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1369 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1370 | bool populate, gfp_t gfp) |
| 1371 | { |
| 1372 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1373 | struct amd_iommu *iommu; |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 1374 | unsigned long i, old_size; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1375 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 1376 | #ifdef CONFIG_IOMMU_STRESS |
| 1377 | populate = false; |
| 1378 | #endif |
| 1379 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1380 | if (index >= APERTURE_MAX_RANGES) |
| 1381 | return -ENOMEM; |
| 1382 | |
| 1383 | dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp); |
| 1384 | if (!dma_dom->aperture[index]) |
| 1385 | return -ENOMEM; |
| 1386 | |
| 1387 | dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp); |
| 1388 | if (!dma_dom->aperture[index]->bitmap) |
| 1389 | goto out_free; |
| 1390 | |
| 1391 | dma_dom->aperture[index]->offset = dma_dom->aperture_size; |
| 1392 | |
| 1393 | if (populate) { |
| 1394 | unsigned long address = dma_dom->aperture_size; |
| 1395 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 1396 | u64 *pte, *pte_page; |
| 1397 | |
| 1398 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1399 | pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1400 | &pte_page, gfp); |
| 1401 | if (!pte) |
| 1402 | goto out_free; |
| 1403 | |
| 1404 | dma_dom->aperture[index]->pte_pages[i] = pte_page; |
| 1405 | |
| 1406 | address += APERTURE_RANGE_SIZE / 64; |
| 1407 | } |
| 1408 | } |
| 1409 | |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 1410 | old_size = dma_dom->aperture_size; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1411 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
| 1412 | |
Joerg Roedel | 17f5b56 | 2011-07-06 17:14:44 +0200 | [diff] [blame] | 1413 | /* Reserve address range used for MSI messages */ |
| 1414 | if (old_size < MSI_ADDR_BASE_LO && |
| 1415 | dma_dom->aperture_size > MSI_ADDR_BASE_LO) { |
| 1416 | unsigned long spage; |
| 1417 | int pages; |
| 1418 | |
| 1419 | pages = iommu_num_pages(MSI_ADDR_BASE_LO, 0x10000, PAGE_SIZE); |
| 1420 | spage = MSI_ADDR_BASE_LO >> PAGE_SHIFT; |
| 1421 | |
| 1422 | dma_ops_reserve_addresses(dma_dom, spage, pages); |
| 1423 | } |
| 1424 | |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1425 | /* Initialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1426 | for_each_iommu(iommu) { |
| 1427 | if (iommu->exclusion_start && |
| 1428 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 1429 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 1430 | unsigned long startpage; |
| 1431 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 1432 | iommu->exclusion_length, |
| 1433 | PAGE_SIZE); |
| 1434 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 1435 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 1436 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | /* |
| 1440 | * Check for areas already mapped as present in the new aperture |
| 1441 | * range and mark those pages as reserved in the allocator. Such |
| 1442 | * mappings may already exist as a result of requested unity |
| 1443 | * mappings for devices. |
| 1444 | */ |
| 1445 | for (i = dma_dom->aperture[index]->offset; |
| 1446 | i < dma_dom->aperture_size; |
| 1447 | i += PAGE_SIZE) { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1448 | u64 *pte = fetch_pte(&dma_dom->domain, i); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1449 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 1450 | continue; |
| 1451 | |
Joerg Roedel | fcd0861 | 2011-10-11 17:41:32 +0200 | [diff] [blame] | 1452 | dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, 1); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1453 | } |
| 1454 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1455 | update_domain(&dma_dom->domain); |
| 1456 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1457 | return 0; |
| 1458 | |
| 1459 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1460 | update_domain(&dma_dom->domain); |
| 1461 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1462 | free_page((unsigned long)dma_dom->aperture[index]->bitmap); |
| 1463 | |
| 1464 | kfree(dma_dom->aperture[index]); |
| 1465 | dma_dom->aperture[index] = NULL; |
| 1466 | |
| 1467 | return -ENOMEM; |
| 1468 | } |
| 1469 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1470 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 1471 | struct dma_ops_domain *dom, |
| 1472 | unsigned int pages, |
| 1473 | unsigned long align_mask, |
| 1474 | u64 dma_mask, |
| 1475 | unsigned long start) |
| 1476 | { |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1477 | unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1478 | int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 1479 | int i = start >> APERTURE_RANGE_SHIFT; |
| 1480 | unsigned long boundary_size; |
| 1481 | unsigned long address = -1; |
| 1482 | unsigned long limit; |
| 1483 | |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1484 | next_bit >>= PAGE_SHIFT; |
| 1485 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1486 | boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
| 1487 | PAGE_SIZE) >> PAGE_SHIFT; |
| 1488 | |
| 1489 | for (;i < max_index; ++i) { |
| 1490 | unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; |
| 1491 | |
| 1492 | if (dom->aperture[i]->offset >= dma_mask) |
| 1493 | break; |
| 1494 | |
| 1495 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 1496 | dma_mask >> PAGE_SHIFT); |
| 1497 | |
| 1498 | address = iommu_area_alloc(dom->aperture[i]->bitmap, |
| 1499 | limit, next_bit, pages, 0, |
| 1500 | boundary_size, align_mask); |
| 1501 | if (address != -1) { |
| 1502 | address = dom->aperture[i]->offset + |
| 1503 | (address << PAGE_SHIFT); |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1504 | dom->next_address = address + (pages << PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1505 | break; |
| 1506 | } |
| 1507 | |
| 1508 | next_bit = 0; |
| 1509 | } |
| 1510 | |
| 1511 | return address; |
| 1512 | } |
| 1513 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1514 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 1515 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1516 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1517 | unsigned long align_mask, |
| 1518 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1519 | { |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1520 | unsigned long address; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1521 | |
Joerg Roedel | fe16f08 | 2009-05-22 12:27:53 +0200 | [diff] [blame] | 1522 | #ifdef CONFIG_IOMMU_STRESS |
| 1523 | dom->next_address = 0; |
| 1524 | dom->need_flush = true; |
| 1525 | #endif |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1526 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1527 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1528 | dma_mask, dom->next_address); |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1529 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1530 | if (address == -1) { |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1531 | dom->next_address = 0; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1532 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
| 1533 | dma_mask, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1534 | dom->need_flush = true; |
| 1535 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1536 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1537 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1538 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1539 | |
| 1540 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 1541 | |
| 1542 | return address; |
| 1543 | } |
| 1544 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1545 | /* |
| 1546 | * The address free function. |
| 1547 | * |
| 1548 | * called with domain->lock held |
| 1549 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1550 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 1551 | unsigned long address, |
| 1552 | unsigned int pages) |
| 1553 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1554 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 1555 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1556 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1557 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 1558 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 1559 | #ifdef CONFIG_IOMMU_STRESS |
| 1560 | if (i < 4) |
| 1561 | return; |
| 1562 | #endif |
| 1563 | |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1564 | if (address >= dom->next_address) |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1565 | dom->need_flush = true; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1566 | |
| 1567 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1568 | |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 1569 | bitmap_clear(range->bitmap, address, pages); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1570 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1571 | } |
| 1572 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1573 | /**************************************************************************** |
| 1574 | * |
| 1575 | * The next functions belong to the domain allocation. A domain is |
| 1576 | * allocated for every IOMMU as the default domain. If device isolation |
| 1577 | * is enabled, every device get its own domain. The most important thing |
| 1578 | * about domains is the page table mapping the DMA address space they |
| 1579 | * contain. |
| 1580 | * |
| 1581 | ****************************************************************************/ |
| 1582 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1583 | /* |
| 1584 | * This function adds a protection domain to the global protection domain list |
| 1585 | */ |
| 1586 | static void add_domain_to_list(struct protection_domain *domain) |
| 1587 | { |
| 1588 | unsigned long flags; |
| 1589 | |
| 1590 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1591 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1592 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1593 | } |
| 1594 | |
| 1595 | /* |
| 1596 | * This function removes a protection domain to the global |
| 1597 | * protection domain list |
| 1598 | */ |
| 1599 | static void del_domain_from_list(struct protection_domain *domain) |
| 1600 | { |
| 1601 | unsigned long flags; |
| 1602 | |
| 1603 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1604 | list_del(&domain->list); |
| 1605 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1606 | } |
| 1607 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1608 | static u16 domain_id_alloc(void) |
| 1609 | { |
| 1610 | unsigned long flags; |
| 1611 | int id; |
| 1612 | |
| 1613 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1614 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1615 | BUG_ON(id == 0); |
| 1616 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1617 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1618 | else |
| 1619 | id = 0; |
| 1620 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1621 | |
| 1622 | return id; |
| 1623 | } |
| 1624 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1625 | static void domain_id_free(int id) |
| 1626 | { |
| 1627 | unsigned long flags; |
| 1628 | |
| 1629 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1630 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1631 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1632 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1633 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1634 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1635 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1636 | { |
| 1637 | int i, j; |
| 1638 | u64 *p1, *p2, *p3; |
| 1639 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1640 | p1 = domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1641 | |
| 1642 | if (!p1) |
| 1643 | return; |
| 1644 | |
| 1645 | for (i = 0; i < 512; ++i) { |
| 1646 | if (!IOMMU_PTE_PRESENT(p1[i])) |
| 1647 | continue; |
| 1648 | |
| 1649 | p2 = IOMMU_PTE_PAGE(p1[i]); |
Joerg Roedel | 3cc3d84 | 2008-12-04 16:44:31 +0100 | [diff] [blame] | 1650 | for (j = 0; j < 512; ++j) { |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1651 | if (!IOMMU_PTE_PRESENT(p2[j])) |
| 1652 | continue; |
| 1653 | p3 = IOMMU_PTE_PAGE(p2[j]); |
| 1654 | free_page((unsigned long)p3); |
| 1655 | } |
| 1656 | |
| 1657 | free_page((unsigned long)p2); |
| 1658 | } |
| 1659 | |
| 1660 | free_page((unsigned long)p1); |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1661 | |
| 1662 | domain->pt_root = NULL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1663 | } |
| 1664 | |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 1665 | static void free_gcr3_tbl_level1(u64 *tbl) |
| 1666 | { |
| 1667 | u64 *ptr; |
| 1668 | int i; |
| 1669 | |
| 1670 | for (i = 0; i < 512; ++i) { |
| 1671 | if (!(tbl[i] & GCR3_VALID)) |
| 1672 | continue; |
| 1673 | |
| 1674 | ptr = __va(tbl[i] & PAGE_MASK); |
| 1675 | |
| 1676 | free_page((unsigned long)ptr); |
| 1677 | } |
| 1678 | } |
| 1679 | |
| 1680 | static void free_gcr3_tbl_level2(u64 *tbl) |
| 1681 | { |
| 1682 | u64 *ptr; |
| 1683 | int i; |
| 1684 | |
| 1685 | for (i = 0; i < 512; ++i) { |
| 1686 | if (!(tbl[i] & GCR3_VALID)) |
| 1687 | continue; |
| 1688 | |
| 1689 | ptr = __va(tbl[i] & PAGE_MASK); |
| 1690 | |
| 1691 | free_gcr3_tbl_level1(ptr); |
| 1692 | } |
| 1693 | } |
| 1694 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1695 | static void free_gcr3_table(struct protection_domain *domain) |
| 1696 | { |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 1697 | if (domain->glx == 2) |
| 1698 | free_gcr3_tbl_level2(domain->gcr3_tbl); |
| 1699 | else if (domain->glx == 1) |
| 1700 | free_gcr3_tbl_level1(domain->gcr3_tbl); |
| 1701 | else if (domain->glx != 0) |
| 1702 | BUG(); |
| 1703 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1704 | free_page((unsigned long)domain->gcr3_tbl); |
| 1705 | } |
| 1706 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1707 | /* |
| 1708 | * Free a domain, only used if something went wrong in the |
| 1709 | * allocation path and we need to free an already allocated page table |
| 1710 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1711 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1712 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1713 | int i; |
| 1714 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1715 | if (!dom) |
| 1716 | return; |
| 1717 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1718 | del_domain_from_list(&dom->domain); |
| 1719 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1720 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1721 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1722 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1723 | if (!dom->aperture[i]) |
| 1724 | continue; |
| 1725 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 1726 | kfree(dom->aperture[i]); |
| 1727 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1728 | |
| 1729 | kfree(dom); |
| 1730 | } |
| 1731 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1732 | /* |
| 1733 | * Allocates a new protection domain usable for the dma_ops functions. |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1734 | * It also initializes the page table and the address allocator data |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1735 | * structures required for the dma_ops interface |
| 1736 | */ |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1737 | static struct dma_ops_domain *dma_ops_domain_alloc(void) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1738 | { |
| 1739 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1740 | |
| 1741 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 1742 | if (!dma_dom) |
| 1743 | return NULL; |
| 1744 | |
| 1745 | spin_lock_init(&dma_dom->domain.lock); |
| 1746 | |
| 1747 | dma_dom->domain.id = domain_id_alloc(); |
| 1748 | if (dma_dom->domain.id == 0) |
| 1749 | goto free_dma_dom; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1750 | INIT_LIST_HEAD(&dma_dom->domain.dev_list); |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 1751 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1752 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 1753 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1754 | dma_dom->domain.priv = dma_dom; |
| 1755 | if (!dma_dom->domain.pt_root) |
| 1756 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1757 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1758 | dma_dom->need_flush = false; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1759 | dma_dom->target_dev = 0xffff; |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1760 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1761 | add_domain_to_list(&dma_dom->domain); |
| 1762 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1763 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1764 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1765 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1766 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1767 | * mark the first page as allocated so we never return 0 as |
| 1768 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1769 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1770 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1771 | dma_dom->next_address = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1772 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1773 | |
| 1774 | return dma_dom; |
| 1775 | |
| 1776 | free_dma_dom: |
| 1777 | dma_ops_domain_free(dma_dom); |
| 1778 | |
| 1779 | return NULL; |
| 1780 | } |
| 1781 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1782 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1783 | * little helper function to check whether a given protection domain is a |
| 1784 | * dma_ops domain |
| 1785 | */ |
| 1786 | static bool dma_ops_domain(struct protection_domain *domain) |
| 1787 | { |
| 1788 | return domain->flags & PD_DMA_OPS_MASK; |
| 1789 | } |
| 1790 | |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 1791 | 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] | 1792 | { |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 1793 | u64 pte_root = 0; |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 1794 | u64 flags = 0; |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 1795 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 1796 | if (domain->mode != PAGE_MODE_NONE) |
| 1797 | pte_root = virt_to_phys(domain->pt_root); |
| 1798 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 1799 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 1800 | << DEV_ENTRY_MODE_SHIFT; |
| 1801 | 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] | 1802 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 1803 | flags = amd_iommu_dev_table[devid].data[1]; |
| 1804 | |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 1805 | if (ats) |
| 1806 | flags |= DTE_FLAG_IOTLB; |
| 1807 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1808 | if (domain->flags & PD_IOMMUV2_MASK) { |
| 1809 | u64 gcr3 = __pa(domain->gcr3_tbl); |
| 1810 | u64 glx = domain->glx; |
| 1811 | u64 tmp; |
| 1812 | |
| 1813 | pte_root |= DTE_FLAG_GV; |
| 1814 | pte_root |= (glx & DTE_GLX_MASK) << DTE_GLX_SHIFT; |
| 1815 | |
| 1816 | /* First mask out possible old values for GCR3 table */ |
| 1817 | tmp = DTE_GCR3_VAL_B(~0ULL) << DTE_GCR3_SHIFT_B; |
| 1818 | flags &= ~tmp; |
| 1819 | |
| 1820 | tmp = DTE_GCR3_VAL_C(~0ULL) << DTE_GCR3_SHIFT_C; |
| 1821 | flags &= ~tmp; |
| 1822 | |
| 1823 | /* Encode GCR3 table into DTE */ |
| 1824 | tmp = DTE_GCR3_VAL_A(gcr3) << DTE_GCR3_SHIFT_A; |
| 1825 | pte_root |= tmp; |
| 1826 | |
| 1827 | tmp = DTE_GCR3_VAL_B(gcr3) << DTE_GCR3_SHIFT_B; |
| 1828 | flags |= tmp; |
| 1829 | |
| 1830 | tmp = DTE_GCR3_VAL_C(gcr3) << DTE_GCR3_SHIFT_C; |
| 1831 | flags |= tmp; |
| 1832 | } |
| 1833 | |
Joerg Roedel | ee6c286 | 2011-11-09 12:06:03 +0100 | [diff] [blame] | 1834 | flags &= ~(0xffffUL); |
| 1835 | flags |= domain->id; |
| 1836 | |
| 1837 | amd_iommu_dev_table[devid].data[1] = flags; |
| 1838 | amd_iommu_dev_table[devid].data[0] = pte_root; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1839 | } |
| 1840 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1841 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1842 | { |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1843 | /* remove entry from the device table seen by the hardware */ |
| 1844 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 1845 | amd_iommu_dev_table[devid].data[1] = 0; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1846 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1847 | amd_iommu_apply_erratum_63(devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1848 | } |
| 1849 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1850 | static void do_attach(struct iommu_dev_data *dev_data, |
| 1851 | struct protection_domain *domain) |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1852 | { |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1853 | struct amd_iommu *iommu; |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1854 | bool ats; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1855 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1856 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 1857 | ats = dev_data->ats.enabled; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1858 | |
| 1859 | /* Update data structures */ |
| 1860 | dev_data->domain = domain; |
| 1861 | list_add(&dev_data->list, &domain->dev_list); |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 1862 | set_dte_entry(dev_data->devid, domain, ats); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1863 | |
| 1864 | /* Do reference counting */ |
| 1865 | domain->dev_iommu[iommu->index] += 1; |
| 1866 | domain->dev_cnt += 1; |
| 1867 | |
| 1868 | /* Flush the DTE entry */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1869 | device_flush_dte(dev_data); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1870 | } |
| 1871 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1872 | static void do_detach(struct iommu_dev_data *dev_data) |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1873 | { |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1874 | struct amd_iommu *iommu; |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1875 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1876 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1877 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1878 | /* decrease reference counters */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1879 | dev_data->domain->dev_iommu[iommu->index] -= 1; |
| 1880 | dev_data->domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1881 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1882 | /* Update data structures */ |
| 1883 | dev_data->domain = NULL; |
| 1884 | list_del(&dev_data->list); |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 1885 | clear_dte_entry(dev_data->devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1886 | |
| 1887 | /* Flush the DTE entry */ |
Joerg Roedel | 6c54204 | 2011-06-09 17:07:31 +0200 | [diff] [blame] | 1888 | device_flush_dte(dev_data); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1889 | } |
| 1890 | |
| 1891 | /* |
| 1892 | * If a device is not yet associated with a domain, this function does |
| 1893 | * assigns it visible for the hardware |
| 1894 | */ |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1895 | static int __attach_device(struct iommu_dev_data *dev_data, |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1896 | struct protection_domain *domain) |
| 1897 | { |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1898 | int ret; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1899 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1900 | /* lock domain */ |
| 1901 | spin_lock(&domain->lock); |
| 1902 | |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 1903 | if (dev_data->alias_data != NULL) { |
| 1904 | struct iommu_dev_data *alias_data = dev_data->alias_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1905 | |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 1906 | /* Some sanity checks */ |
| 1907 | ret = -EBUSY; |
| 1908 | if (alias_data->domain != NULL && |
| 1909 | alias_data->domain != domain) |
| 1910 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1911 | |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 1912 | if (dev_data->domain != NULL && |
| 1913 | dev_data->domain != domain) |
| 1914 | goto out_unlock; |
| 1915 | |
| 1916 | /* Do real assignment */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1917 | if (alias_data->domain == NULL) |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1918 | do_attach(alias_data, domain); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1919 | |
| 1920 | atomic_inc(&alias_data->bind); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1921 | } |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1922 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1923 | if (dev_data->domain == NULL) |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 1924 | do_attach(dev_data, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1925 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1926 | atomic_inc(&dev_data->bind); |
| 1927 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1928 | ret = 0; |
| 1929 | |
| 1930 | out_unlock: |
| 1931 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1932 | /* ready */ |
| 1933 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1934 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1935 | return ret; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1936 | } |
| 1937 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1938 | |
| 1939 | static void pdev_iommuv2_disable(struct pci_dev *pdev) |
| 1940 | { |
| 1941 | pci_disable_ats(pdev); |
| 1942 | pci_disable_pri(pdev); |
| 1943 | pci_disable_pasid(pdev); |
| 1944 | } |
| 1945 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 1946 | /* FIXME: Change generic reset-function to do the same */ |
| 1947 | static int pri_reset_while_enabled(struct pci_dev *pdev) |
| 1948 | { |
| 1949 | u16 control; |
| 1950 | int pos; |
| 1951 | |
| 1952 | pos = pci_find_ext_capability(pdev, PCI_PRI_CAP); |
| 1953 | if (!pos) |
| 1954 | return -EINVAL; |
| 1955 | |
| 1956 | pci_read_config_word(pdev, pos + PCI_PRI_CONTROL_OFF, &control); |
| 1957 | control |= PCI_PRI_RESET; |
| 1958 | pci_write_config_word(pdev, pos + PCI_PRI_CONTROL_OFF, control); |
| 1959 | |
| 1960 | return 0; |
| 1961 | } |
| 1962 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1963 | static int pdev_iommuv2_enable(struct pci_dev *pdev) |
| 1964 | { |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 1965 | bool reset_enable; |
| 1966 | int reqs, ret; |
| 1967 | |
| 1968 | /* FIXME: Hardcode number of outstanding requests for now */ |
| 1969 | reqs = 32; |
| 1970 | if (pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE)) |
| 1971 | reqs = 1; |
| 1972 | reset_enable = pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_ENABLE_RESET); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1973 | |
| 1974 | /* Only allow access to user-accessible pages */ |
| 1975 | ret = pci_enable_pasid(pdev, 0); |
| 1976 | if (ret) |
| 1977 | goto out_err; |
| 1978 | |
| 1979 | /* First reset the PRI state of the device */ |
| 1980 | ret = pci_reset_pri(pdev); |
| 1981 | if (ret) |
| 1982 | goto out_err; |
| 1983 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 1984 | /* Enable PRI */ |
| 1985 | ret = pci_enable_pri(pdev, reqs); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1986 | if (ret) |
| 1987 | goto out_err; |
| 1988 | |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 1989 | if (reset_enable) { |
| 1990 | ret = pri_reset_while_enabled(pdev); |
| 1991 | if (ret) |
| 1992 | goto out_err; |
| 1993 | } |
| 1994 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 1995 | ret = pci_enable_ats(pdev, PAGE_SHIFT); |
| 1996 | if (ret) |
| 1997 | goto out_err; |
| 1998 | |
| 1999 | return 0; |
| 2000 | |
| 2001 | out_err: |
| 2002 | pci_disable_pri(pdev); |
| 2003 | pci_disable_pasid(pdev); |
| 2004 | |
| 2005 | return ret; |
| 2006 | } |
| 2007 | |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2008 | /* FIXME: Move this to PCI code */ |
| 2009 | #define PCI_PRI_TLP_OFF (1 << 2) |
| 2010 | |
| 2011 | bool pci_pri_tlp_required(struct pci_dev *pdev) |
| 2012 | { |
| 2013 | u16 control; |
| 2014 | int pos; |
| 2015 | |
| 2016 | pos = pci_find_ext_capability(pdev, PCI_PRI_CAP); |
| 2017 | if (!pos) |
| 2018 | return false; |
| 2019 | |
| 2020 | pci_read_config_word(pdev, pos + PCI_PRI_CONTROL_OFF, &control); |
| 2021 | |
| 2022 | return (control & PCI_PRI_TLP_OFF) ? true : false; |
| 2023 | } |
| 2024 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2025 | /* |
| 2026 | * If a device is not yet associated with a domain, this function does |
| 2027 | * assigns it visible for the hardware |
| 2028 | */ |
| 2029 | static int attach_device(struct device *dev, |
| 2030 | struct protection_domain *domain) |
| 2031 | { |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2032 | struct pci_dev *pdev = to_pci_dev(dev); |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2033 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2034 | unsigned long flags; |
| 2035 | int ret; |
| 2036 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2037 | dev_data = get_dev_data(dev); |
| 2038 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2039 | if (domain->flags & PD_IOMMUV2_MASK) { |
| 2040 | if (!dev_data->iommu_v2 || !dev_data->passthrough) |
| 2041 | return -EINVAL; |
| 2042 | |
| 2043 | if (pdev_iommuv2_enable(pdev) != 0) |
| 2044 | return -EINVAL; |
| 2045 | |
| 2046 | dev_data->ats.enabled = true; |
| 2047 | dev_data->ats.qdep = pci_ats_queue_depth(pdev); |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 2048 | dev_data->pri_tlp = pci_pri_tlp_required(pdev); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2049 | } else if (amd_iommu_iotlb_sup && |
| 2050 | pci_enable_ats(pdev, PAGE_SHIFT) == 0) { |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2051 | dev_data->ats.enabled = true; |
| 2052 | dev_data->ats.qdep = pci_ats_queue_depth(pdev); |
| 2053 | } |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2054 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2055 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2056 | ret = __attach_device(dev_data, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2057 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2058 | |
| 2059 | /* |
| 2060 | * We might boot into a crash-kernel here. The crashed kernel |
| 2061 | * left the caches in the IOMMU dirty. So we have to flush |
| 2062 | * here to evict all dirty stuff. |
| 2063 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2064 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2065 | |
| 2066 | return ret; |
| 2067 | } |
| 2068 | |
| 2069 | /* |
| 2070 | * Removes a device from a protection domain (unlocked) |
| 2071 | */ |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2072 | static void __detach_device(struct iommu_dev_data *dev_data) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2073 | { |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 2074 | struct protection_domain *domain; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 2075 | unsigned long flags; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2076 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2077 | BUG_ON(!dev_data->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2078 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 2079 | domain = dev_data->domain; |
| 2080 | |
| 2081 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 2082 | |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 2083 | if (dev_data->alias_data != NULL) { |
| 2084 | struct iommu_dev_data *alias_data = dev_data->alias_data; |
| 2085 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2086 | if (atomic_dec_and_test(&alias_data->bind)) |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2087 | do_detach(alias_data); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 2088 | } |
| 2089 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2090 | if (atomic_dec_and_test(&dev_data->bind)) |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2091 | do_detach(dev_data); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 2092 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 2093 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2094 | |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 2095 | /* |
| 2096 | * If we run in passthrough mode the device must be assigned to the |
Joerg Roedel | d3ad937 | 2010-01-22 17:55:27 +0100 | [diff] [blame] | 2097 | * passthrough domain if it is detached from any other domain. |
| 2098 | * Make sure we can deassign from the pt_domain itself. |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 2099 | */ |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2100 | if (dev_data->passthrough && |
Joerg Roedel | d3ad937 | 2010-01-22 17:55:27 +0100 | [diff] [blame] | 2101 | (dev_data->domain == NULL && domain != pt_domain)) |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2102 | __attach_device(dev_data, pt_domain); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2103 | } |
| 2104 | |
| 2105 | /* |
| 2106 | * Removes a device from a protection domain (with devtable_lock held) |
| 2107 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2108 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2109 | { |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2110 | struct protection_domain *domain; |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2111 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2112 | unsigned long flags; |
| 2113 | |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2114 | dev_data = get_dev_data(dev); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2115 | domain = dev_data->domain; |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2116 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2117 | /* lock device table */ |
| 2118 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2119 | __detach_device(dev_data); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2120 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | fd7b553 | 2011-04-05 15:31:08 +0200 | [diff] [blame] | 2121 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2122 | if (domain->flags & PD_IOMMUV2_MASK) |
| 2123 | pdev_iommuv2_disable(to_pci_dev(dev)); |
| 2124 | else if (dev_data->ats.enabled) |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2125 | pci_disable_ats(to_pci_dev(dev)); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 2126 | |
| 2127 | dev_data->ats.enabled = false; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2128 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2129 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2130 | /* |
| 2131 | * Find out the protection domain structure for a given PCI device. This |
| 2132 | * will give us the pointer to the page table root for example. |
| 2133 | */ |
| 2134 | static struct protection_domain *domain_for_device(struct device *dev) |
| 2135 | { |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 2136 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 2137 | struct protection_domain *dom = NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2138 | unsigned long flags; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2139 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2140 | dev_data = get_dev_data(dev); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2141 | |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 2142 | if (dev_data->domain) |
| 2143 | return dev_data->domain; |
| 2144 | |
Joerg Roedel | 71f7758 | 2011-06-09 19:03:15 +0200 | [diff] [blame] | 2145 | if (dev_data->alias_data != NULL) { |
| 2146 | struct iommu_dev_data *alias_data = dev_data->alias_data; |
Joerg Roedel | 2b02b09 | 2011-06-09 17:48:39 +0200 | [diff] [blame] | 2147 | |
| 2148 | read_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2149 | if (alias_data->domain != NULL) { |
| 2150 | __attach_device(dev_data, alias_data->domain); |
| 2151 | dom = alias_data->domain; |
| 2152 | } |
| 2153 | read_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2154 | } |
| 2155 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2156 | return dom; |
| 2157 | } |
| 2158 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2159 | static int device_change_notifier(struct notifier_block *nb, |
| 2160 | unsigned long action, void *data) |
| 2161 | { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2162 | struct dma_ops_domain *dma_domain; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2163 | struct protection_domain *domain; |
| 2164 | struct iommu_dev_data *dev_data; |
| 2165 | struct device *dev = data; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2166 | struct amd_iommu *iommu; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 2167 | unsigned long flags; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2168 | u16 devid; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2169 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2170 | if (!check_device(dev)) |
| 2171 | return 0; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2172 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2173 | devid = get_device_id(dev); |
| 2174 | iommu = amd_iommu_rlookup_table[devid]; |
| 2175 | dev_data = get_dev_data(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2176 | |
| 2177 | switch (action) { |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 2178 | case BUS_NOTIFY_UNBOUND_DRIVER: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2179 | |
| 2180 | domain = domain_for_device(dev); |
| 2181 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2182 | if (!domain) |
| 2183 | goto out; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2184 | if (dev_data->passthrough) |
Joerg Roedel | a1ca331 | 2009-09-01 12:22:22 +0200 | [diff] [blame] | 2185 | break; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2186 | detach_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2187 | break; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 2188 | case BUS_NOTIFY_ADD_DEVICE: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2189 | |
| 2190 | iommu_init_device(dev); |
| 2191 | |
| 2192 | domain = domain_for_device(dev); |
| 2193 | |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 2194 | /* allocate a protection domain if a device is added */ |
| 2195 | dma_domain = find_protection_domain(devid); |
| 2196 | if (dma_domain) |
| 2197 | goto out; |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2198 | dma_domain = dma_ops_domain_alloc(); |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 2199 | if (!dma_domain) |
| 2200 | goto out; |
| 2201 | dma_domain->target_dev = devid; |
| 2202 | |
| 2203 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 2204 | list_add_tail(&dma_domain->list, &iommu_pd_list); |
| 2205 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 2206 | |
| 2207 | break; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2208 | case BUS_NOTIFY_DEL_DEVICE: |
| 2209 | |
| 2210 | iommu_uninit_device(dev); |
| 2211 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2212 | default: |
| 2213 | goto out; |
| 2214 | } |
| 2215 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2216 | iommu_completion_wait(iommu); |
| 2217 | |
| 2218 | out: |
| 2219 | return 0; |
| 2220 | } |
| 2221 | |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2222 | static struct notifier_block device_nb = { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2223 | .notifier_call = device_change_notifier, |
| 2224 | }; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 2225 | |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 2226 | void amd_iommu_init_notifier(void) |
| 2227 | { |
| 2228 | bus_register_notifier(&pci_bus_type, &device_nb); |
| 2229 | } |
| 2230 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2231 | /***************************************************************************** |
| 2232 | * |
| 2233 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 2234 | * |
| 2235 | *****************************************************************************/ |
| 2236 | |
| 2237 | /* |
| 2238 | * In the dma_ops path we only have the struct device. This function |
| 2239 | * finds the corresponding IOMMU, the protection domain and the |
| 2240 | * requestor id for a given device. |
| 2241 | * If the device is not yet associated with a domain this is also done |
| 2242 | * in this function. |
| 2243 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2244 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2245 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2246 | struct protection_domain *domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2247 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2248 | u16 devid = get_device_id(dev); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2249 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2250 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2251 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2252 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2253 | domain = domain_for_device(dev); |
| 2254 | if (domain != NULL && !dma_ops_domain(domain)) |
| 2255 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2256 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2257 | if (domain != NULL) |
| 2258 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2259 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2260 | /* Device not bount yet - bind it */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2261 | dma_dom = find_protection_domain(devid); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2262 | if (!dma_dom) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2263 | dma_dom = amd_iommu_rlookup_table[devid]->default_dom; |
| 2264 | attach_device(dev, &dma_dom->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2265 | DUMP_printk("Using protection domain %d for device %s\n", |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2266 | dma_dom->domain.id, dev_name(dev)); |
Joerg Roedel | f91ba19 | 2008-11-25 12:56:12 +0100 | [diff] [blame] | 2267 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2268 | return &dma_dom->domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 2269 | } |
| 2270 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2271 | static void update_device_table(struct protection_domain *domain) |
| 2272 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2273 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2274 | |
Joerg Roedel | ea61cdd | 2011-06-09 12:56:30 +0200 | [diff] [blame] | 2275 | list_for_each_entry(dev_data, &domain->dev_list, list) |
| 2276 | set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2277 | } |
| 2278 | |
| 2279 | static void update_domain(struct protection_domain *domain) |
| 2280 | { |
| 2281 | if (!domain->updated) |
| 2282 | return; |
| 2283 | |
| 2284 | update_device_table(domain); |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2285 | |
| 2286 | domain_flush_devices(domain); |
| 2287 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2288 | |
| 2289 | domain->updated = false; |
| 2290 | } |
| 2291 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2292 | /* |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2293 | * This function fetches the PTE for a given address in the aperture |
| 2294 | */ |
| 2295 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 2296 | unsigned long address) |
| 2297 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2298 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2299 | u64 *pte, *pte_page; |
| 2300 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2301 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 2302 | if (!aperture) |
| 2303 | return NULL; |
| 2304 | |
| 2305 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2306 | if (!pte) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 2307 | pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 2308 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2309 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 2310 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 2311 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2312 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 2313 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2314 | |
| 2315 | return pte; |
| 2316 | } |
| 2317 | |
| 2318 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2319 | * This is the generic map function. It maps one 4kb page at paddr to |
| 2320 | * the given address in the DMA address space for the domain. |
| 2321 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2322 | 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] | 2323 | unsigned long address, |
| 2324 | phys_addr_t paddr, |
| 2325 | int direction) |
| 2326 | { |
| 2327 | u64 *pte, __pte; |
| 2328 | |
| 2329 | WARN_ON(address > dom->aperture_size); |
| 2330 | |
| 2331 | paddr &= PAGE_MASK; |
| 2332 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 2333 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2334 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2335 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2336 | |
| 2337 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 2338 | |
| 2339 | if (direction == DMA_TO_DEVICE) |
| 2340 | __pte |= IOMMU_PTE_IR; |
| 2341 | else if (direction == DMA_FROM_DEVICE) |
| 2342 | __pte |= IOMMU_PTE_IW; |
| 2343 | else if (direction == DMA_BIDIRECTIONAL) |
| 2344 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 2345 | |
| 2346 | WARN_ON(*pte); |
| 2347 | |
| 2348 | *pte = __pte; |
| 2349 | |
| 2350 | return (dma_addr_t)address; |
| 2351 | } |
| 2352 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2353 | /* |
| 2354 | * The generic unmapping function for on page in the DMA address space. |
| 2355 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2356 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2357 | unsigned long address) |
| 2358 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2359 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2360 | u64 *pte; |
| 2361 | |
| 2362 | if (address >= dom->aperture_size) |
| 2363 | return; |
| 2364 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2365 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 2366 | if (!aperture) |
| 2367 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2368 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 2369 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 2370 | if (!pte) |
| 2371 | return; |
| 2372 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 2373 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2374 | |
| 2375 | WARN_ON(!*pte); |
| 2376 | |
| 2377 | *pte = 0ULL; |
| 2378 | } |
| 2379 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2380 | /* |
| 2381 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 2382 | * contiguous memory region into DMA address space. It is used by all |
| 2383 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2384 | * Must be called with the domain lock held. |
| 2385 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2386 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2387 | struct dma_ops_domain *dma_dom, |
| 2388 | phys_addr_t paddr, |
| 2389 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2390 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2391 | bool align, |
| 2392 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2393 | { |
| 2394 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2395 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2396 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2397 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2398 | int i; |
| 2399 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 2400 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2401 | paddr &= PAGE_MASK; |
| 2402 | |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 2403 | INC_STATS_COUNTER(total_map_requests); |
| 2404 | |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 2405 | if (pages > 1) |
| 2406 | INC_STATS_COUNTER(cross_page); |
| 2407 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 2408 | if (align) |
| 2409 | align_mask = (1UL << get_order(size)) - 1; |
| 2410 | |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 2411 | retry: |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2412 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 2413 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2414 | if (unlikely(address == DMA_ERROR_CODE)) { |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 2415 | /* |
| 2416 | * setting next_address here will let the address |
| 2417 | * allocator only scan the new allocated range in the |
| 2418 | * first run. This is a small optimization. |
| 2419 | */ |
| 2420 | dma_dom->next_address = dma_dom->aperture_size; |
| 2421 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 2422 | if (alloc_new_range(dma_dom, false, GFP_ATOMIC)) |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 2423 | goto out; |
| 2424 | |
| 2425 | /* |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 2426 | * aperture was successfully enlarged by 128 MB, try |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 2427 | * allocation again |
| 2428 | */ |
| 2429 | goto retry; |
| 2430 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2431 | |
| 2432 | start = address; |
| 2433 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2434 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2435 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2436 | goto out_unmap; |
| 2437 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2438 | paddr += PAGE_SIZE; |
| 2439 | start += PAGE_SIZE; |
| 2440 | } |
| 2441 | address += offset; |
| 2442 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 2443 | ADD_STATS_COUNTER(alloced_io_mem, size); |
| 2444 | |
FUJITA Tomonori | afa9fdc | 2008-09-20 01:23:30 +0900 | [diff] [blame] | 2445 | if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2446 | domain_flush_tlb(&dma_dom->domain); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 2447 | dma_dom->need_flush = false; |
Joerg Roedel | 318afd4 | 2009-11-23 18:32:38 +0100 | [diff] [blame] | 2448 | } else if (unlikely(amd_iommu_np_cache)) |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2449 | domain_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 2450 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2451 | out: |
| 2452 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2453 | |
| 2454 | out_unmap: |
| 2455 | |
| 2456 | for (--i; i >= 0; --i) { |
| 2457 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2458 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 2459 | } |
| 2460 | |
| 2461 | dma_ops_free_addresses(dma_dom, address, pages); |
| 2462 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2463 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2464 | } |
| 2465 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2466 | /* |
| 2467 | * Does the reverse of the __map_single function. Must be called with |
| 2468 | * the domain lock held too |
| 2469 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2470 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2471 | dma_addr_t dma_addr, |
| 2472 | size_t size, |
| 2473 | int dir) |
| 2474 | { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 2475 | dma_addr_t flush_addr; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2476 | dma_addr_t i, start; |
| 2477 | unsigned int pages; |
| 2478 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2479 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 2480 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2481 | return; |
| 2482 | |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 2483 | flush_addr = dma_addr; |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 2484 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2485 | dma_addr &= PAGE_MASK; |
| 2486 | start = dma_addr; |
| 2487 | |
| 2488 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 2489 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2490 | start += PAGE_SIZE; |
| 2491 | } |
| 2492 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 2493 | SUB_STATS_COUNTER(alloced_io_mem, size); |
| 2494 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2495 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 2496 | |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 2497 | if (amd_iommu_unmap_flush || dma_dom->need_flush) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2498 | domain_flush_pages(&dma_dom->domain, flush_addr, size); |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 2499 | dma_dom->need_flush = false; |
| 2500 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 2501 | } |
| 2502 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2503 | /* |
| 2504 | * The exported map_single function for dma_ops. |
| 2505 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2506 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 2507 | unsigned long offset, size_t size, |
| 2508 | enum dma_data_direction dir, |
| 2509 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2510 | { |
| 2511 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2512 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2513 | dma_addr_t addr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2514 | u64 dma_mask; |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2515 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2516 | |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 2517 | INC_STATS_COUNTER(cnt_map_single); |
| 2518 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2519 | domain = get_domain(dev); |
| 2520 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2521 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2522 | else if (IS_ERR(domain)) |
| 2523 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2524 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2525 | dma_mask = *dev->dma_mask; |
| 2526 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2527 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2528 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2529 | addr = __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2530 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2531 | if (addr == DMA_ERROR_CODE) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2532 | goto out; |
| 2533 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2534 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2535 | |
| 2536 | out: |
| 2537 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2538 | |
| 2539 | return addr; |
| 2540 | } |
| 2541 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2542 | /* |
| 2543 | * The exported unmap_single function for dma_ops. |
| 2544 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2545 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 2546 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2547 | { |
| 2548 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2549 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2550 | |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 2551 | INC_STATS_COUNTER(cnt_unmap_single); |
| 2552 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2553 | domain = get_domain(dev); |
| 2554 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2555 | return; |
| 2556 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2557 | spin_lock_irqsave(&domain->lock, flags); |
| 2558 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2559 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2560 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2561 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2562 | |
| 2563 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2564 | } |
| 2565 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2566 | /* |
| 2567 | * This is a special map_sg function which is used if we should map a |
| 2568 | * device which is not handled by an AMD IOMMU in the system. |
| 2569 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2570 | static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, |
| 2571 | int nelems, int dir) |
| 2572 | { |
| 2573 | struct scatterlist *s; |
| 2574 | int i; |
| 2575 | |
| 2576 | for_each_sg(sglist, s, nelems, i) { |
| 2577 | s->dma_address = (dma_addr_t)sg_phys(s); |
| 2578 | s->dma_length = s->length; |
| 2579 | } |
| 2580 | |
| 2581 | return nelems; |
| 2582 | } |
| 2583 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2584 | /* |
| 2585 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2586 | * lists). |
| 2587 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2588 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2589 | int nelems, enum dma_data_direction dir, |
| 2590 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2591 | { |
| 2592 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2593 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2594 | int i; |
| 2595 | struct scatterlist *s; |
| 2596 | phys_addr_t paddr; |
| 2597 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2598 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2599 | |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 2600 | INC_STATS_COUNTER(cnt_map_sg); |
| 2601 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2602 | domain = get_domain(dev); |
| 2603 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2604 | return map_sg_no_iommu(dev, sglist, nelems, dir); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2605 | else if (IS_ERR(domain)) |
| 2606 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2607 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2608 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2609 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2610 | spin_lock_irqsave(&domain->lock, flags); |
| 2611 | |
| 2612 | for_each_sg(sglist, s, nelems, i) { |
| 2613 | paddr = sg_phys(s); |
| 2614 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2615 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2616 | paddr, s->length, dir, false, |
| 2617 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2618 | |
| 2619 | if (s->dma_address) { |
| 2620 | s->dma_length = s->length; |
| 2621 | mapped_elems++; |
| 2622 | } else |
| 2623 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2624 | } |
| 2625 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2626 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2627 | |
| 2628 | out: |
| 2629 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2630 | |
| 2631 | return mapped_elems; |
| 2632 | unmap: |
| 2633 | for_each_sg(sglist, s, mapped_elems, i) { |
| 2634 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2635 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2636 | s->dma_length, dir); |
| 2637 | s->dma_address = s->dma_length = 0; |
| 2638 | } |
| 2639 | |
| 2640 | mapped_elems = 0; |
| 2641 | |
| 2642 | goto out; |
| 2643 | } |
| 2644 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2645 | /* |
| 2646 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2647 | * lists). |
| 2648 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2649 | static void unmap_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2650 | int nelems, enum dma_data_direction dir, |
| 2651 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2652 | { |
| 2653 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2654 | struct protection_domain *domain; |
| 2655 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2656 | int i; |
| 2657 | |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 2658 | INC_STATS_COUNTER(cnt_unmap_sg); |
| 2659 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2660 | domain = get_domain(dev); |
| 2661 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2662 | return; |
| 2663 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2664 | spin_lock_irqsave(&domain->lock, flags); |
| 2665 | |
| 2666 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2667 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2668 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2669 | s->dma_address = s->dma_length = 0; |
| 2670 | } |
| 2671 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2672 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2673 | |
| 2674 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2675 | } |
| 2676 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2677 | /* |
| 2678 | * The exported alloc_coherent function for dma_ops. |
| 2679 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2680 | static void *alloc_coherent(struct device *dev, size_t size, |
| 2681 | dma_addr_t *dma_addr, gfp_t flag) |
| 2682 | { |
| 2683 | unsigned long flags; |
| 2684 | void *virt_addr; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2685 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2686 | phys_addr_t paddr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2687 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2688 | |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 2689 | INC_STATS_COUNTER(cnt_alloc_coherent); |
| 2690 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2691 | domain = get_domain(dev); |
| 2692 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2693 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2694 | *dma_addr = __pa(virt_addr); |
| 2695 | return virt_addr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2696 | } else if (IS_ERR(domain)) |
| 2697 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2698 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2699 | dma_mask = dev->coherent_dma_mask; |
| 2700 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 2701 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2702 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2703 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2704 | if (!virt_addr) |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2705 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2706 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2707 | paddr = virt_to_phys(virt_addr); |
| 2708 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2709 | if (!dma_mask) |
| 2710 | dma_mask = *dev->dma_mask; |
| 2711 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2712 | spin_lock_irqsave(&domain->lock, flags); |
| 2713 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2714 | *dma_addr = __map_single(dev, domain->priv, paddr, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2715 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2716 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2717 | if (*dma_addr == DMA_ERROR_CODE) { |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2718 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2719 | goto out_free; |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2720 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2721 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2722 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2723 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2724 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2725 | |
| 2726 | return virt_addr; |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2727 | |
| 2728 | out_free: |
| 2729 | |
| 2730 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2731 | |
| 2732 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2733 | } |
| 2734 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2735 | /* |
| 2736 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2737 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2738 | static void free_coherent(struct device *dev, size_t size, |
| 2739 | void *virt_addr, dma_addr_t dma_addr) |
| 2740 | { |
| 2741 | unsigned long flags; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2742 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2743 | |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 2744 | INC_STATS_COUNTER(cnt_free_coherent); |
| 2745 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2746 | domain = get_domain(dev); |
| 2747 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2748 | goto free_mem; |
| 2749 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2750 | spin_lock_irqsave(&domain->lock, flags); |
| 2751 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2752 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2753 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2754 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2755 | |
| 2756 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2757 | |
| 2758 | free_mem: |
| 2759 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2760 | } |
| 2761 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2762 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2763 | * This function is called by the DMA layer to find out if we can handle a |
| 2764 | * particular device. It is part of the dma_ops. |
| 2765 | */ |
| 2766 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2767 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2768 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2769 | } |
| 2770 | |
| 2771 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2772 | * The function for pre-allocating protection domains. |
| 2773 | * |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2774 | * If the driver core informs the DMA layer if a driver grabs a device |
| 2775 | * we don't need to preallocate the protection domains anymore. |
| 2776 | * For now we have to. |
| 2777 | */ |
Jaswinder Singh Rajput | 0e93dd8 | 2008-12-29 21:45:22 +0530 | [diff] [blame] | 2778 | static void prealloc_protection_domains(void) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2779 | { |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2780 | struct iommu_dev_data *dev_data; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2781 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2782 | struct pci_dev *dev = NULL; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2783 | u16 devid; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2784 | |
Chris Wright | d18c69d | 2010-04-02 18:27:55 -0700 | [diff] [blame] | 2785 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2786 | |
| 2787 | /* Do we handle this device? */ |
| 2788 | if (!check_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2789 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2790 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2791 | dev_data = get_dev_data(&dev->dev); |
| 2792 | if (!amd_iommu_force_isolation && dev_data->iommu_v2) { |
| 2793 | /* Make sure passthrough domain is allocated */ |
| 2794 | alloc_passthrough_domain(); |
| 2795 | dev_data->passthrough = true; |
| 2796 | attach_device(&dev->dev, pt_domain); |
| 2797 | pr_info("AMD-Vi: Using passthough domain for device %s\n", |
| 2798 | dev_name(&dev->dev)); |
| 2799 | } |
| 2800 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2801 | /* Is there already any domain for it? */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2802 | if (domain_for_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2803 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2804 | |
| 2805 | devid = get_device_id(&dev->dev); |
| 2806 | |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2807 | dma_dom = dma_ops_domain_alloc(); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2808 | if (!dma_dom) |
| 2809 | continue; |
| 2810 | init_unity_mappings_for_device(dma_dom, devid); |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2811 | dma_dom->target_dev = devid; |
| 2812 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2813 | attach_device(&dev->dev, &dma_dom->domain); |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2814 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2815 | list_add_tail(&dma_dom->list, &iommu_pd_list); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2816 | } |
| 2817 | } |
| 2818 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2819 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2820 | .alloc_coherent = alloc_coherent, |
| 2821 | .free_coherent = free_coherent, |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2822 | .map_page = map_page, |
| 2823 | .unmap_page = unmap_page, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2824 | .map_sg = map_sg, |
| 2825 | .unmap_sg = unmap_sg, |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2826 | .dma_supported = amd_iommu_dma_supported, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2827 | }; |
| 2828 | |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 2829 | static unsigned device_dma_ops_init(void) |
| 2830 | { |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2831 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 2832 | struct pci_dev *pdev = NULL; |
| 2833 | unsigned unhandled = 0; |
| 2834 | |
| 2835 | for_each_pci_dev(pdev) { |
| 2836 | if (!check_device(&pdev->dev)) { |
| 2837 | unhandled += 1; |
| 2838 | continue; |
| 2839 | } |
| 2840 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2841 | dev_data = get_dev_data(&pdev->dev); |
| 2842 | |
| 2843 | if (!dev_data->passthrough) |
| 2844 | pdev->dev.archdata.dma_ops = &amd_iommu_dma_ops; |
| 2845 | else |
| 2846 | pdev->dev.archdata.dma_ops = &nommu_dma_ops; |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 2847 | } |
| 2848 | |
| 2849 | return unhandled; |
| 2850 | } |
| 2851 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2852 | /* |
| 2853 | * The function which clues the AMD IOMMU driver into dma_ops. |
| 2854 | */ |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 2855 | |
| 2856 | void __init amd_iommu_init_api(void) |
| 2857 | { |
Joerg Roedel | 2cc21c4 | 2011-09-06 17:56:07 +0200 | [diff] [blame] | 2858 | bus_set_iommu(&pci_bus_type, &amd_iommu_ops); |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 2859 | } |
| 2860 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2861 | int __init amd_iommu_init_dma_ops(void) |
| 2862 | { |
| 2863 | struct amd_iommu *iommu; |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 2864 | int ret, unhandled; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2865 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2866 | /* |
| 2867 | * first allocate a default protection domain for every IOMMU we |
| 2868 | * found in the system. Devices not assigned to any other |
| 2869 | * protection domain will be assigned to the default one. |
| 2870 | */ |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2871 | for_each_iommu(iommu) { |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2872 | iommu->default_dom = dma_ops_domain_alloc(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2873 | if (iommu->default_dom == NULL) |
| 2874 | return -ENOMEM; |
Joerg Roedel | e2dc14a | 2008-12-10 18:48:59 +0100 | [diff] [blame] | 2875 | iommu->default_dom->domain.flags |= PD_DEFAULT_MASK; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2876 | ret = iommu_init_unity_mappings(iommu); |
| 2877 | if (ret) |
| 2878 | goto free_domains; |
| 2879 | } |
| 2880 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2881 | /* |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2882 | * Pre-allocate the protection domains for each device. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2883 | */ |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2884 | prealloc_protection_domains(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2885 | |
| 2886 | iommu_detected = 1; |
FUJITA Tomonori | 75f1cdf | 2009-11-10 19:46:20 +0900 | [diff] [blame] | 2887 | swiotlb = 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2888 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2889 | /* Make the driver finally visible to the drivers */ |
Joerg Roedel | 27c2127 | 2011-05-30 15:56:24 +0200 | [diff] [blame] | 2890 | unhandled = device_dma_ops_init(); |
| 2891 | if (unhandled && max_pfn > MAX_DMA32_PFN) { |
| 2892 | /* There are unhandled devices - initialize swiotlb for them */ |
| 2893 | swiotlb = 1; |
| 2894 | } |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2895 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 2896 | amd_iommu_stats_init(); |
| 2897 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2898 | return 0; |
| 2899 | |
| 2900 | free_domains: |
| 2901 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2902 | for_each_iommu(iommu) { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2903 | if (iommu->default_dom) |
| 2904 | dma_ops_domain_free(iommu->default_dom); |
| 2905 | } |
| 2906 | |
| 2907 | return ret; |
| 2908 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2909 | |
| 2910 | /***************************************************************************** |
| 2911 | * |
| 2912 | * The following functions belong to the exported interface of AMD IOMMU |
| 2913 | * |
| 2914 | * This interface allows access to lower level functions of the IOMMU |
| 2915 | * like protection domain handling and assignement of devices to domains |
| 2916 | * which is not possible with the dma_ops interface. |
| 2917 | * |
| 2918 | *****************************************************************************/ |
| 2919 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2920 | static void cleanup_domain(struct protection_domain *domain) |
| 2921 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2922 | struct iommu_dev_data *dev_data, *next; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2923 | unsigned long flags; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2924 | |
| 2925 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2926 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2927 | list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) { |
Joerg Roedel | ec9e79e | 2011-06-09 17:25:50 +0200 | [diff] [blame] | 2928 | __detach_device(dev_data); |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2929 | atomic_set(&dev_data->bind, 0); |
| 2930 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2931 | |
| 2932 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2933 | } |
| 2934 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2935 | static void protection_domain_free(struct protection_domain *domain) |
| 2936 | { |
| 2937 | if (!domain) |
| 2938 | return; |
| 2939 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2940 | del_domain_from_list(domain); |
| 2941 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2942 | if (domain->id) |
| 2943 | domain_id_free(domain->id); |
| 2944 | |
| 2945 | kfree(domain); |
| 2946 | } |
| 2947 | |
| 2948 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2949 | { |
| 2950 | struct protection_domain *domain; |
| 2951 | |
| 2952 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 2953 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2954 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2955 | |
| 2956 | spin_lock_init(&domain->lock); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2957 | mutex_init(&domain->api_lock); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2958 | domain->id = domain_id_alloc(); |
| 2959 | if (!domain->id) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2960 | goto out_err; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 2961 | INIT_LIST_HEAD(&domain->dev_list); |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2962 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2963 | add_domain_to_list(domain); |
| 2964 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2965 | return domain; |
| 2966 | |
| 2967 | out_err: |
| 2968 | kfree(domain); |
| 2969 | |
| 2970 | return NULL; |
| 2971 | } |
| 2972 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 2973 | static int __init alloc_passthrough_domain(void) |
| 2974 | { |
| 2975 | if (pt_domain != NULL) |
| 2976 | return 0; |
| 2977 | |
| 2978 | /* allocate passthrough domain */ |
| 2979 | pt_domain = protection_domain_alloc(); |
| 2980 | if (!pt_domain) |
| 2981 | return -ENOMEM; |
| 2982 | |
| 2983 | pt_domain->mode = PAGE_MODE_NONE; |
| 2984 | |
| 2985 | return 0; |
| 2986 | } |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2987 | static int amd_iommu_domain_init(struct iommu_domain *dom) |
| 2988 | { |
| 2989 | struct protection_domain *domain; |
| 2990 | |
| 2991 | domain = protection_domain_alloc(); |
| 2992 | if (!domain) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2993 | goto out_free; |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2994 | |
| 2995 | domain->mode = PAGE_MODE_3_LEVEL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2996 | domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 2997 | if (!domain->pt_root) |
| 2998 | goto out_free; |
| 2999 | |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3000 | domain->iommu_domain = dom; |
| 3001 | |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 3002 | dom->priv = domain; |
| 3003 | |
| 3004 | return 0; |
| 3005 | |
| 3006 | out_free: |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 3007 | protection_domain_free(domain); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 3008 | |
| 3009 | return -ENOMEM; |
| 3010 | } |
| 3011 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3012 | static void amd_iommu_domain_destroy(struct iommu_domain *dom) |
| 3013 | { |
| 3014 | struct protection_domain *domain = dom->priv; |
| 3015 | |
| 3016 | if (!domain) |
| 3017 | return; |
| 3018 | |
| 3019 | if (domain->dev_cnt > 0) |
| 3020 | cleanup_domain(domain); |
| 3021 | |
| 3022 | BUG_ON(domain->dev_cnt != 0); |
| 3023 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3024 | if (domain->mode != PAGE_MODE_NONE) |
| 3025 | free_pagetable(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3026 | |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 3027 | if (domain->flags & PD_IOMMUV2_MASK) |
| 3028 | free_gcr3_table(domain); |
| 3029 | |
Joerg Roedel | 8b408fe | 2010-03-08 14:20:07 +0100 | [diff] [blame] | 3030 | protection_domain_free(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 3031 | |
| 3032 | dom->priv = NULL; |
| 3033 | } |
| 3034 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3035 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 3036 | struct device *dev) |
| 3037 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3038 | struct iommu_dev_data *dev_data = dev->archdata.iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3039 | struct amd_iommu *iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3040 | u16 devid; |
| 3041 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3042 | if (!check_device(dev)) |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3043 | return; |
| 3044 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3045 | devid = get_device_id(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3046 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3047 | if (dev_data->domain != NULL) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3048 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3049 | |
| 3050 | iommu = amd_iommu_rlookup_table[devid]; |
| 3051 | if (!iommu) |
| 3052 | return; |
| 3053 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 3054 | iommu_completion_wait(iommu); |
| 3055 | } |
| 3056 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3057 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 3058 | struct device *dev) |
| 3059 | { |
| 3060 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3061 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3062 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3063 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3064 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3065 | if (!check_device(dev)) |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3066 | return -EINVAL; |
| 3067 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3068 | dev_data = dev->archdata.iommu; |
| 3069 | |
Joerg Roedel | f62dda6 | 2011-06-09 12:55:35 +0200 | [diff] [blame] | 3070 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3071 | if (!iommu) |
| 3072 | return -EINVAL; |
| 3073 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 3074 | if (dev_data->domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3075 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3076 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3077 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3078 | |
| 3079 | iommu_completion_wait(iommu); |
| 3080 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3081 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 3082 | } |
| 3083 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3084 | static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova, |
| 3085 | phys_addr_t paddr, int gfp_order, int iommu_prot) |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3086 | { |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3087 | unsigned long page_size = 0x1000UL << gfp_order; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3088 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3089 | int prot = 0; |
| 3090 | int ret; |
| 3091 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3092 | if (domain->mode == PAGE_MODE_NONE) |
| 3093 | return -EINVAL; |
| 3094 | |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3095 | if (iommu_prot & IOMMU_READ) |
| 3096 | prot |= IOMMU_PROT_IR; |
| 3097 | if (iommu_prot & IOMMU_WRITE) |
| 3098 | prot |= IOMMU_PROT_IW; |
| 3099 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3100 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 3101 | ret = iommu_map_page(domain, iova, paddr, prot, page_size); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3102 | mutex_unlock(&domain->api_lock); |
| 3103 | |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 3104 | return ret; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 3105 | } |
| 3106 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3107 | static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, |
| 3108 | int gfp_order) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3109 | { |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3110 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3111 | unsigned long page_size, unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3112 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3113 | if (domain->mode == PAGE_MODE_NONE) |
| 3114 | return -EINVAL; |
| 3115 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3116 | page_size = 0x1000UL << gfp_order; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3117 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3118 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3119 | unmap_size = iommu_unmap_page(domain, iova, page_size); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 3120 | mutex_unlock(&domain->api_lock); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3121 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 3122 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 3123 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3124 | return get_order(unmap_size); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 3125 | } |
| 3126 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3127 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
| 3128 | unsigned long iova) |
| 3129 | { |
| 3130 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 3131 | unsigned long offset_mask; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3132 | phys_addr_t paddr; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 3133 | u64 *pte, __pte; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3134 | |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3135 | if (domain->mode == PAGE_MODE_NONE) |
| 3136 | return iova; |
| 3137 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 3138 | pte = fetch_pte(domain, iova); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3139 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 3140 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3141 | return 0; |
| 3142 | |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 3143 | if (PM_PTE_LEVEL(*pte) == 0) |
| 3144 | offset_mask = PAGE_SIZE - 1; |
| 3145 | else |
| 3146 | offset_mask = PTE_PAGE_SIZE(*pte) - 1; |
| 3147 | |
| 3148 | __pte = *pte & PM_ADDR_MASK; |
| 3149 | paddr = (__pte & ~offset_mask) | (iova & offset_mask); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 3150 | |
| 3151 | return paddr; |
| 3152 | } |
| 3153 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 3154 | static int amd_iommu_domain_has_cap(struct iommu_domain *domain, |
| 3155 | unsigned long cap) |
| 3156 | { |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 3157 | switch (cap) { |
| 3158 | case IOMMU_CAP_CACHE_COHERENCY: |
| 3159 | return 1; |
| 3160 | } |
| 3161 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 3162 | return 0; |
| 3163 | } |
| 3164 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3165 | static struct iommu_ops amd_iommu_ops = { |
| 3166 | .domain_init = amd_iommu_domain_init, |
| 3167 | .domain_destroy = amd_iommu_domain_destroy, |
| 3168 | .attach_dev = amd_iommu_attach_device, |
| 3169 | .detach_dev = amd_iommu_detach_device, |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 3170 | .map = amd_iommu_map, |
| 3171 | .unmap = amd_iommu_unmap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3172 | .iova_to_phys = amd_iommu_iova_to_phys, |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 3173 | .domain_has_cap = amd_iommu_domain_has_cap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 3174 | }; |
| 3175 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3176 | /***************************************************************************** |
| 3177 | * |
| 3178 | * The next functions do a basic initialization of IOMMU for pass through |
| 3179 | * mode |
| 3180 | * |
| 3181 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 3182 | * DMA-API translation. |
| 3183 | * |
| 3184 | *****************************************************************************/ |
| 3185 | |
| 3186 | int __init amd_iommu_init_passthrough(void) |
| 3187 | { |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 3188 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3189 | struct pci_dev *dev = NULL; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 3190 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3191 | u16 devid; |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 3192 | int ret; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3193 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 3194 | ret = alloc_passthrough_domain(); |
| 3195 | if (ret) |
| 3196 | return ret; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3197 | |
Kulikov Vasiliy | 6c54aab | 2010-07-03 12:03:51 -0400 | [diff] [blame] | 3198 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3199 | if (!check_device(&dev->dev)) |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3200 | continue; |
| 3201 | |
Joerg Roedel | 5abcdba | 2011-12-01 15:49:45 +0100 | [diff] [blame] | 3202 | dev_data = get_dev_data(&dev->dev); |
| 3203 | dev_data->passthrough = true; |
| 3204 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 3205 | devid = get_device_id(&dev->dev); |
| 3206 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3207 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3208 | if (!iommu) |
| 3209 | continue; |
| 3210 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 3211 | attach_device(&dev->dev, pt_domain); |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 3212 | } |
| 3213 | |
| 3214 | pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); |
| 3215 | |
| 3216 | return 0; |
| 3217 | } |
Joerg Roedel | 72e1dcc | 2011-11-10 19:13:51 +0100 | [diff] [blame] | 3218 | |
| 3219 | /* IOMMUv2 specific functions */ |
| 3220 | int amd_iommu_register_ppr_notifier(struct notifier_block *nb) |
| 3221 | { |
| 3222 | return atomic_notifier_chain_register(&ppr_notifier, nb); |
| 3223 | } |
| 3224 | EXPORT_SYMBOL(amd_iommu_register_ppr_notifier); |
| 3225 | |
| 3226 | int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb) |
| 3227 | { |
| 3228 | return atomic_notifier_chain_unregister(&ppr_notifier, nb); |
| 3229 | } |
| 3230 | EXPORT_SYMBOL(amd_iommu_unregister_ppr_notifier); |
Joerg Roedel | 132bd68 | 2011-11-17 14:18:46 +0100 | [diff] [blame] | 3231 | |
| 3232 | void amd_iommu_domain_direct_map(struct iommu_domain *dom) |
| 3233 | { |
| 3234 | struct protection_domain *domain = dom->priv; |
| 3235 | unsigned long flags; |
| 3236 | |
| 3237 | spin_lock_irqsave(&domain->lock, flags); |
| 3238 | |
| 3239 | /* Update data structure */ |
| 3240 | domain->mode = PAGE_MODE_NONE; |
| 3241 | domain->updated = true; |
| 3242 | |
| 3243 | /* Make changes visible to IOMMUs */ |
| 3244 | update_domain(domain); |
| 3245 | |
| 3246 | /* Page-table is not visible to IOMMU anymore, so free it */ |
| 3247 | free_pagetable(domain); |
| 3248 | |
| 3249 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3250 | } |
| 3251 | EXPORT_SYMBOL(amd_iommu_domain_direct_map); |
Joerg Roedel | 52815b7 | 2011-11-17 17:24:28 +0100 | [diff] [blame] | 3252 | |
| 3253 | int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids) |
| 3254 | { |
| 3255 | struct protection_domain *domain = dom->priv; |
| 3256 | unsigned long flags; |
| 3257 | int levels, ret; |
| 3258 | |
| 3259 | if (pasids <= 0 || pasids > (PASID_MASK + 1)) |
| 3260 | return -EINVAL; |
| 3261 | |
| 3262 | /* Number of GCR3 table levels required */ |
| 3263 | for (levels = 0; (pasids - 1) & ~0x1ff; pasids >>= 9) |
| 3264 | levels += 1; |
| 3265 | |
| 3266 | if (levels > amd_iommu_max_glx_val) |
| 3267 | return -EINVAL; |
| 3268 | |
| 3269 | spin_lock_irqsave(&domain->lock, flags); |
| 3270 | |
| 3271 | /* |
| 3272 | * Save us all sanity checks whether devices already in the |
| 3273 | * domain support IOMMUv2. Just force that the domain has no |
| 3274 | * devices attached when it is switched into IOMMUv2 mode. |
| 3275 | */ |
| 3276 | ret = -EBUSY; |
| 3277 | if (domain->dev_cnt > 0 || domain->flags & PD_IOMMUV2_MASK) |
| 3278 | goto out; |
| 3279 | |
| 3280 | ret = -ENOMEM; |
| 3281 | domain->gcr3_tbl = (void *)get_zeroed_page(GFP_ATOMIC); |
| 3282 | if (domain->gcr3_tbl == NULL) |
| 3283 | goto out; |
| 3284 | |
| 3285 | domain->glx = levels; |
| 3286 | domain->flags |= PD_IOMMUV2_MASK; |
| 3287 | domain->updated = true; |
| 3288 | |
| 3289 | update_domain(domain); |
| 3290 | |
| 3291 | ret = 0; |
| 3292 | |
| 3293 | out: |
| 3294 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3295 | |
| 3296 | return ret; |
| 3297 | } |
| 3298 | EXPORT_SYMBOL(amd_iommu_domain_enable_v2); |
Joerg Roedel | 22e266c | 2011-11-21 15:59:08 +0100 | [diff] [blame] | 3299 | |
| 3300 | static int __flush_pasid(struct protection_domain *domain, int pasid, |
| 3301 | u64 address, bool size) |
| 3302 | { |
| 3303 | struct iommu_dev_data *dev_data; |
| 3304 | struct iommu_cmd cmd; |
| 3305 | int i, ret; |
| 3306 | |
| 3307 | if (!(domain->flags & PD_IOMMUV2_MASK)) |
| 3308 | return -EINVAL; |
| 3309 | |
| 3310 | build_inv_iommu_pasid(&cmd, domain->id, pasid, address, size); |
| 3311 | |
| 3312 | /* |
| 3313 | * IOMMU TLB needs to be flushed before Device TLB to |
| 3314 | * prevent device TLB refill from IOMMU TLB |
| 3315 | */ |
| 3316 | for (i = 0; i < amd_iommus_present; ++i) { |
| 3317 | if (domain->dev_iommu[i] == 0) |
| 3318 | continue; |
| 3319 | |
| 3320 | ret = iommu_queue_command(amd_iommus[i], &cmd); |
| 3321 | if (ret != 0) |
| 3322 | goto out; |
| 3323 | } |
| 3324 | |
| 3325 | /* Wait until IOMMU TLB flushes are complete */ |
| 3326 | domain_flush_complete(domain); |
| 3327 | |
| 3328 | /* Now flush device TLBs */ |
| 3329 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
| 3330 | struct amd_iommu *iommu; |
| 3331 | int qdep; |
| 3332 | |
| 3333 | BUG_ON(!dev_data->ats.enabled); |
| 3334 | |
| 3335 | qdep = dev_data->ats.qdep; |
| 3336 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 3337 | |
| 3338 | build_inv_iotlb_pasid(&cmd, dev_data->devid, pasid, |
| 3339 | qdep, address, size); |
| 3340 | |
| 3341 | ret = iommu_queue_command(iommu, &cmd); |
| 3342 | if (ret != 0) |
| 3343 | goto out; |
| 3344 | } |
| 3345 | |
| 3346 | /* Wait until all device TLBs are flushed */ |
| 3347 | domain_flush_complete(domain); |
| 3348 | |
| 3349 | ret = 0; |
| 3350 | |
| 3351 | out: |
| 3352 | |
| 3353 | return ret; |
| 3354 | } |
| 3355 | |
| 3356 | static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid, |
| 3357 | u64 address) |
| 3358 | { |
| 3359 | return __flush_pasid(domain, pasid, address, false); |
| 3360 | } |
| 3361 | |
| 3362 | int amd_iommu_flush_page(struct iommu_domain *dom, int pasid, |
| 3363 | u64 address) |
| 3364 | { |
| 3365 | struct protection_domain *domain = dom->priv; |
| 3366 | unsigned long flags; |
| 3367 | int ret; |
| 3368 | |
| 3369 | spin_lock_irqsave(&domain->lock, flags); |
| 3370 | ret = __amd_iommu_flush_page(domain, pasid, address); |
| 3371 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3372 | |
| 3373 | return ret; |
| 3374 | } |
| 3375 | EXPORT_SYMBOL(amd_iommu_flush_page); |
| 3376 | |
| 3377 | static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid) |
| 3378 | { |
| 3379 | return __flush_pasid(domain, pasid, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, |
| 3380 | true); |
| 3381 | } |
| 3382 | |
| 3383 | int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid) |
| 3384 | { |
| 3385 | struct protection_domain *domain = dom->priv; |
| 3386 | unsigned long flags; |
| 3387 | int ret; |
| 3388 | |
| 3389 | spin_lock_irqsave(&domain->lock, flags); |
| 3390 | ret = __amd_iommu_flush_tlb(domain, pasid); |
| 3391 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3392 | |
| 3393 | return ret; |
| 3394 | } |
| 3395 | EXPORT_SYMBOL(amd_iommu_flush_tlb); |
| 3396 | |
Joerg Roedel | b16137b | 2011-11-21 16:50:23 +0100 | [diff] [blame] | 3397 | static u64 *__get_gcr3_pte(u64 *root, int level, int pasid, bool alloc) |
| 3398 | { |
| 3399 | int index; |
| 3400 | u64 *pte; |
| 3401 | |
| 3402 | while (true) { |
| 3403 | |
| 3404 | index = (pasid >> (9 * level)) & 0x1ff; |
| 3405 | pte = &root[index]; |
| 3406 | |
| 3407 | if (level == 0) |
| 3408 | break; |
| 3409 | |
| 3410 | if (!(*pte & GCR3_VALID)) { |
| 3411 | if (!alloc) |
| 3412 | return NULL; |
| 3413 | |
| 3414 | root = (void *)get_zeroed_page(GFP_ATOMIC); |
| 3415 | if (root == NULL) |
| 3416 | return NULL; |
| 3417 | |
| 3418 | *pte = __pa(root) | GCR3_VALID; |
| 3419 | } |
| 3420 | |
| 3421 | root = __va(*pte & PAGE_MASK); |
| 3422 | |
| 3423 | level -= 1; |
| 3424 | } |
| 3425 | |
| 3426 | return pte; |
| 3427 | } |
| 3428 | |
| 3429 | static int __set_gcr3(struct protection_domain *domain, int pasid, |
| 3430 | unsigned long cr3) |
| 3431 | { |
| 3432 | u64 *pte; |
| 3433 | |
| 3434 | if (domain->mode != PAGE_MODE_NONE) |
| 3435 | return -EINVAL; |
| 3436 | |
| 3437 | pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, true); |
| 3438 | if (pte == NULL) |
| 3439 | return -ENOMEM; |
| 3440 | |
| 3441 | *pte = (cr3 & PAGE_MASK) | GCR3_VALID; |
| 3442 | |
| 3443 | return __amd_iommu_flush_tlb(domain, pasid); |
| 3444 | } |
| 3445 | |
| 3446 | static int __clear_gcr3(struct protection_domain *domain, int pasid) |
| 3447 | { |
| 3448 | u64 *pte; |
| 3449 | |
| 3450 | if (domain->mode != PAGE_MODE_NONE) |
| 3451 | return -EINVAL; |
| 3452 | |
| 3453 | pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, false); |
| 3454 | if (pte == NULL) |
| 3455 | return 0; |
| 3456 | |
| 3457 | *pte = 0; |
| 3458 | |
| 3459 | return __amd_iommu_flush_tlb(domain, pasid); |
| 3460 | } |
| 3461 | |
| 3462 | int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid, |
| 3463 | unsigned long cr3) |
| 3464 | { |
| 3465 | struct protection_domain *domain = dom->priv; |
| 3466 | unsigned long flags; |
| 3467 | int ret; |
| 3468 | |
| 3469 | spin_lock_irqsave(&domain->lock, flags); |
| 3470 | ret = __set_gcr3(domain, pasid, cr3); |
| 3471 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3472 | |
| 3473 | return ret; |
| 3474 | } |
| 3475 | EXPORT_SYMBOL(amd_iommu_domain_set_gcr3); |
| 3476 | |
| 3477 | int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid) |
| 3478 | { |
| 3479 | struct protection_domain *domain = dom->priv; |
| 3480 | unsigned long flags; |
| 3481 | int ret; |
| 3482 | |
| 3483 | spin_lock_irqsave(&domain->lock, flags); |
| 3484 | ret = __clear_gcr3(domain, pasid); |
| 3485 | spin_unlock_irqrestore(&domain->lock, flags); |
| 3486 | |
| 3487 | return ret; |
| 3488 | } |
| 3489 | EXPORT_SYMBOL(amd_iommu_domain_clear_gcr3); |
Joerg Roedel | c99afa2 | 2011-11-21 18:19:25 +0100 | [diff] [blame] | 3490 | |
| 3491 | int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid, |
| 3492 | int status, int tag) |
| 3493 | { |
| 3494 | struct iommu_dev_data *dev_data; |
| 3495 | struct amd_iommu *iommu; |
| 3496 | struct iommu_cmd cmd; |
| 3497 | |
| 3498 | dev_data = get_dev_data(&pdev->dev); |
| 3499 | iommu = amd_iommu_rlookup_table[dev_data->devid]; |
| 3500 | |
| 3501 | build_complete_ppr(&cmd, dev_data->devid, pasid, status, |
| 3502 | tag, dev_data->pri_tlp); |
| 3503 | |
| 3504 | return iommu_queue_command(iommu, &cmd); |
| 3505 | } |
| 3506 | EXPORT_SYMBOL(amd_iommu_complete_ppr); |
Joerg Roedel | f3572db | 2011-11-23 12:36:25 +0100 | [diff] [blame] | 3507 | |
| 3508 | struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev) |
| 3509 | { |
| 3510 | struct protection_domain *domain; |
| 3511 | |
| 3512 | domain = get_domain(&pdev->dev); |
| 3513 | if (IS_ERR(domain)) |
| 3514 | return NULL; |
| 3515 | |
| 3516 | /* Only return IOMMUv2 domains */ |
| 3517 | if (!(domain->flags & PD_IOMMUV2_MASK)) |
| 3518 | return NULL; |
| 3519 | |
| 3520 | return domain->iommu_domain; |
| 3521 | } |
| 3522 | EXPORT_SYMBOL(amd_iommu_get_v2_domain); |
Joerg Roedel | 6a113dd | 2011-12-01 12:04:58 +0100 | [diff] [blame^] | 3523 | |
| 3524 | void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum) |
| 3525 | { |
| 3526 | struct iommu_dev_data *dev_data; |
| 3527 | |
| 3528 | if (!amd_iommu_v2_supported()) |
| 3529 | return; |
| 3530 | |
| 3531 | dev_data = get_dev_data(&pdev->dev); |
| 3532 | dev_data->errata |= (1 << erratum); |
| 3533 | } |
| 3534 | EXPORT_SYMBOL(amd_iommu_enable_device_erratum); |