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 | |
| 20 | #include <linux/pci.h> |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 21 | #include <linux/bitmap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 23 | #include <linux/debugfs.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 24 | #include <linux/scatterlist.h> |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 25 | #include <linux/dma-mapping.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 26 | #include <linux/iommu-helper.h> |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 27 | #include <linux/iommu.h> |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 28 | #include <linux/delay.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 29 | #include <asm/proto.h> |
FUJITA Tomonori | 46a7fa2 | 2008-07-11 10:23:42 +0900 | [diff] [blame] | 30 | #include <asm/iommu.h> |
Joerg Roedel | 1d9b16d | 2008-11-27 18:39:15 +0100 | [diff] [blame] | 31 | #include <asm/gart.h> |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 32 | #include <asm/amd_iommu_proto.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 33 | #include <asm/amd_iommu_types.h> |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 34 | #include <asm/amd_iommu.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 35 | |
| 36 | #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) |
| 37 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 38 | #define LOOP_TIMEOUT 100000 |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 39 | |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 40 | static DEFINE_RWLOCK(amd_iommu_devtable_lock); |
| 41 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 42 | /* A list of preallocated protection domains */ |
| 43 | static LIST_HEAD(iommu_pd_list); |
| 44 | static DEFINE_SPINLOCK(iommu_pd_list_lock); |
| 45 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 46 | /* |
| 47 | * Domain for untranslated devices - only allocated |
| 48 | * if iommu=pt passed on kernel cmd line. |
| 49 | */ |
| 50 | static struct protection_domain *pt_domain; |
| 51 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 52 | static struct iommu_ops amd_iommu_ops; |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 53 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 54 | /* |
| 55 | * general struct to manage commands send to an IOMMU |
| 56 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 57 | struct iommu_cmd { |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 58 | u32 data[4]; |
| 59 | }; |
| 60 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 61 | static void update_domain(struct protection_domain *domain); |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 62 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 63 | /**************************************************************************** |
| 64 | * |
| 65 | * Helper functions |
| 66 | * |
| 67 | ****************************************************************************/ |
| 68 | |
| 69 | static inline u16 get_device_id(struct device *dev) |
| 70 | { |
| 71 | struct pci_dev *pdev = to_pci_dev(dev); |
| 72 | |
| 73 | return calc_devid(pdev->bus->number, pdev->devfn); |
| 74 | } |
| 75 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 76 | static struct iommu_dev_data *get_dev_data(struct device *dev) |
| 77 | { |
| 78 | return dev->archdata.iommu; |
| 79 | } |
| 80 | |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 81 | /* |
| 82 | * In this function the list of preallocated protection domains is traversed to |
| 83 | * find the domain for a specific device |
| 84 | */ |
| 85 | static struct dma_ops_domain *find_protection_domain(u16 devid) |
| 86 | { |
| 87 | struct dma_ops_domain *entry, *ret = NULL; |
| 88 | unsigned long flags; |
| 89 | u16 alias = amd_iommu_alias_table[devid]; |
| 90 | |
| 91 | if (list_empty(&iommu_pd_list)) |
| 92 | return NULL; |
| 93 | |
| 94 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 95 | |
| 96 | list_for_each_entry(entry, &iommu_pd_list, list) { |
| 97 | if (entry->target_dev == devid || |
| 98 | entry->target_dev == alias) { |
| 99 | ret = entry; |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 109 | /* |
| 110 | * This function checks if the driver got a valid device from the caller to |
| 111 | * avoid dereferencing invalid pointers. |
| 112 | */ |
| 113 | static bool check_device(struct device *dev) |
| 114 | { |
| 115 | u16 devid; |
| 116 | |
| 117 | if (!dev || !dev->dma_mask) |
| 118 | return false; |
| 119 | |
| 120 | /* No device or no PCI device */ |
Julia Lawall | 339d326 | 2010-02-06 09:42:39 +0100 | [diff] [blame] | 121 | if (dev->bus != &pci_bus_type) |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 122 | return false; |
| 123 | |
| 124 | devid = get_device_id(dev); |
| 125 | |
| 126 | /* Out of our scope? */ |
| 127 | if (devid > amd_iommu_last_bdf) |
| 128 | return false; |
| 129 | |
| 130 | if (amd_iommu_rlookup_table[devid] == NULL) |
| 131 | return false; |
| 132 | |
| 133 | return true; |
| 134 | } |
| 135 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 136 | static int iommu_init_device(struct device *dev) |
| 137 | { |
| 138 | struct iommu_dev_data *dev_data; |
| 139 | struct pci_dev *pdev; |
| 140 | u16 devid, alias; |
| 141 | |
| 142 | if (dev->archdata.iommu) |
| 143 | return 0; |
| 144 | |
| 145 | dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL); |
| 146 | if (!dev_data) |
| 147 | return -ENOMEM; |
| 148 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 149 | dev_data->dev = dev; |
| 150 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 151 | devid = get_device_id(dev); |
| 152 | alias = amd_iommu_alias_table[devid]; |
| 153 | pdev = pci_get_bus_and_slot(PCI_BUS(alias), alias & 0xff); |
| 154 | if (pdev) |
| 155 | dev_data->alias = &pdev->dev; |
| 156 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 157 | atomic_set(&dev_data->bind, 0); |
| 158 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 159 | dev->archdata.iommu = dev_data; |
| 160 | |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | static void iommu_uninit_device(struct device *dev) |
| 166 | { |
| 167 | kfree(dev->archdata.iommu); |
| 168 | } |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 169 | |
| 170 | void __init amd_iommu_uninit_devices(void) |
| 171 | { |
| 172 | struct pci_dev *pdev = NULL; |
| 173 | |
| 174 | for_each_pci_dev(pdev) { |
| 175 | |
| 176 | if (!check_device(&pdev->dev)) |
| 177 | continue; |
| 178 | |
| 179 | iommu_uninit_device(&pdev->dev); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | int __init amd_iommu_init_devices(void) |
| 184 | { |
| 185 | struct pci_dev *pdev = NULL; |
| 186 | int ret = 0; |
| 187 | |
| 188 | for_each_pci_dev(pdev) { |
| 189 | |
| 190 | if (!check_device(&pdev->dev)) |
| 191 | continue; |
| 192 | |
| 193 | ret = iommu_init_device(&pdev->dev); |
| 194 | if (ret) |
| 195 | goto out_free; |
| 196 | } |
| 197 | |
| 198 | return 0; |
| 199 | |
| 200 | out_free: |
| 201 | |
| 202 | amd_iommu_uninit_devices(); |
| 203 | |
| 204 | return ret; |
| 205 | } |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 206 | #ifdef CONFIG_AMD_IOMMU_STATS |
| 207 | |
| 208 | /* |
| 209 | * Initialization code for statistics collection |
| 210 | */ |
| 211 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 212 | DECLARE_STATS_COUNTER(compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 213 | DECLARE_STATS_COUNTER(cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 214 | DECLARE_STATS_COUNTER(cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 215 | DECLARE_STATS_COUNTER(cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 216 | DECLARE_STATS_COUNTER(cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 217 | DECLARE_STATS_COUNTER(cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 218 | DECLARE_STATS_COUNTER(cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 219 | DECLARE_STATS_COUNTER(cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 220 | DECLARE_STATS_COUNTER(domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 221 | DECLARE_STATS_COUNTER(domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 222 | DECLARE_STATS_COUNTER(alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 223 | DECLARE_STATS_COUNTER(total_map_requests); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 224 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 225 | static struct dentry *stats_dir; |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 226 | static struct dentry *de_fflush; |
| 227 | |
| 228 | static void amd_iommu_stats_add(struct __iommu_counter *cnt) |
| 229 | { |
| 230 | if (stats_dir == NULL) |
| 231 | return; |
| 232 | |
| 233 | cnt->dent = debugfs_create_u64(cnt->name, 0444, stats_dir, |
| 234 | &cnt->value); |
| 235 | } |
| 236 | |
| 237 | static void amd_iommu_stats_init(void) |
| 238 | { |
| 239 | stats_dir = debugfs_create_dir("amd-iommu", NULL); |
| 240 | if (stats_dir == NULL) |
| 241 | return; |
| 242 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 243 | de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir, |
| 244 | (u32 *)&amd_iommu_unmap_flush); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 245 | |
| 246 | amd_iommu_stats_add(&compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 247 | amd_iommu_stats_add(&cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 248 | amd_iommu_stats_add(&cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 249 | amd_iommu_stats_add(&cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 250 | amd_iommu_stats_add(&cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 251 | amd_iommu_stats_add(&cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 252 | amd_iommu_stats_add(&cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 253 | amd_iommu_stats_add(&cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 254 | amd_iommu_stats_add(&domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 255 | amd_iommu_stats_add(&domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 256 | amd_iommu_stats_add(&alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 257 | amd_iommu_stats_add(&total_map_requests); |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | #endif |
| 261 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 262 | /**************************************************************************** |
| 263 | * |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 264 | * Interrupt handling functions |
| 265 | * |
| 266 | ****************************************************************************/ |
| 267 | |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 268 | static void dump_dte_entry(u16 devid) |
| 269 | { |
| 270 | int i; |
| 271 | |
| 272 | for (i = 0; i < 8; ++i) |
| 273 | pr_err("AMD-Vi: DTE[%d]: %08x\n", i, |
| 274 | amd_iommu_dev_table[devid].data[i]); |
| 275 | } |
| 276 | |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 277 | static void dump_command(unsigned long phys_addr) |
| 278 | { |
| 279 | struct iommu_cmd *cmd = phys_to_virt(phys_addr); |
| 280 | int i; |
| 281 | |
| 282 | for (i = 0; i < 4; ++i) |
| 283 | pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); |
| 284 | } |
| 285 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 286 | static void iommu_print_event(struct amd_iommu *iommu, void *__evt) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 287 | { |
| 288 | u32 *event = __evt; |
| 289 | int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; |
| 290 | int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; |
| 291 | int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; |
| 292 | int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; |
| 293 | u64 address = (u64)(((u64)event[3]) << 32) | event[2]; |
| 294 | |
Joerg Roedel | 4c6f40d | 2009-09-01 16:43:58 +0200 | [diff] [blame] | 295 | printk(KERN_ERR "AMD-Vi: Event logged ["); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 296 | |
| 297 | switch (type) { |
| 298 | case EVENT_TYPE_ILL_DEV: |
| 299 | printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " |
| 300 | "address=0x%016llx flags=0x%04x]\n", |
| 301 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 302 | address, flags); |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 303 | dump_dte_entry(devid); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 304 | break; |
| 305 | case EVENT_TYPE_IO_FAULT: |
| 306 | printk("IO_PAGE_FAULT device=%02x:%02x.%x " |
| 307 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 308 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 309 | domid, address, flags); |
| 310 | break; |
| 311 | case EVENT_TYPE_DEV_TAB_ERR: |
| 312 | printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 313 | "address=0x%016llx flags=0x%04x]\n", |
| 314 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 315 | address, flags); |
| 316 | break; |
| 317 | case EVENT_TYPE_PAGE_TAB_ERR: |
| 318 | printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 319 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 320 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 321 | domid, address, flags); |
| 322 | break; |
| 323 | case EVENT_TYPE_ILL_CMD: |
| 324 | printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 325 | dump_command(address); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 326 | break; |
| 327 | case EVENT_TYPE_CMD_HARD_ERR: |
| 328 | printk("COMMAND_HARDWARE_ERROR address=0x%016llx " |
| 329 | "flags=0x%04x]\n", address, flags); |
| 330 | break; |
| 331 | case EVENT_TYPE_IOTLB_INV_TO: |
| 332 | printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " |
| 333 | "address=0x%016llx]\n", |
| 334 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 335 | address); |
| 336 | break; |
| 337 | case EVENT_TYPE_INV_DEV_REQ: |
| 338 | printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " |
| 339 | "address=0x%016llx flags=0x%04x]\n", |
| 340 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 341 | address, flags); |
| 342 | break; |
| 343 | default: |
| 344 | printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | static void iommu_poll_events(struct amd_iommu *iommu) |
| 349 | { |
| 350 | u32 head, tail; |
| 351 | unsigned long flags; |
| 352 | |
| 353 | spin_lock_irqsave(&iommu->lock, flags); |
| 354 | |
| 355 | head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 356 | tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); |
| 357 | |
| 358 | while (head != tail) { |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 359 | iommu_print_event(iommu, iommu->evt_buf + head); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 360 | head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; |
| 361 | } |
| 362 | |
| 363 | writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 364 | |
| 365 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 366 | } |
| 367 | |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 368 | irqreturn_t amd_iommu_int_handler(int irq, void *data) |
| 369 | { |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 370 | struct amd_iommu *iommu; |
| 371 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 372 | for_each_iommu(iommu) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 373 | iommu_poll_events(iommu); |
| 374 | |
| 375 | return IRQ_HANDLED; |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /**************************************************************************** |
| 379 | * |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 380 | * IOMMU command queuing functions |
| 381 | * |
| 382 | ****************************************************************************/ |
| 383 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 384 | static int wait_on_sem(volatile u64 *sem) |
| 385 | { |
| 386 | int i = 0; |
| 387 | |
| 388 | while (*sem == 0 && i < LOOP_TIMEOUT) { |
| 389 | udelay(1); |
| 390 | i += 1; |
| 391 | } |
| 392 | |
| 393 | if (i == LOOP_TIMEOUT) { |
| 394 | pr_alert("AMD-Vi: Completion-Wait loop timed out\n"); |
| 395 | return -EIO; |
| 396 | } |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | static void copy_cmd_to_buffer(struct amd_iommu *iommu, |
| 402 | struct iommu_cmd *cmd, |
| 403 | u32 tail) |
| 404 | { |
| 405 | u8 *target; |
| 406 | |
| 407 | target = iommu->cmd_buf + tail; |
| 408 | tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 409 | |
| 410 | /* Copy command to buffer */ |
| 411 | memcpy(target, cmd, sizeof(*cmd)); |
| 412 | |
| 413 | /* Tell the IOMMU about it */ |
| 414 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 415 | } |
| 416 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 417 | static void build_completion_wait(struct iommu_cmd *cmd, u64 address) |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 418 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 419 | WARN_ON(address & 0x7ULL); |
| 420 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 421 | memset(cmd, 0, sizeof(*cmd)); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 422 | cmd->data[0] = lower_32_bits(__pa(address)) | CMD_COMPL_WAIT_STORE_MASK; |
| 423 | cmd->data[1] = upper_32_bits(__pa(address)); |
| 424 | cmd->data[2] = 1; |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 425 | CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); |
| 426 | } |
| 427 | |
Joerg Roedel | 94fe79e | 2011-04-06 11:07:21 +0200 | [diff] [blame] | 428 | static void build_inv_dte(struct iommu_cmd *cmd, u16 devid) |
| 429 | { |
| 430 | memset(cmd, 0, sizeof(*cmd)); |
| 431 | cmd->data[0] = devid; |
| 432 | CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY); |
| 433 | } |
| 434 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 435 | static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 436 | size_t size, u16 domid, int pde) |
| 437 | { |
| 438 | u64 pages; |
| 439 | int s; |
| 440 | |
| 441 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
| 442 | s = 0; |
| 443 | |
| 444 | if (pages > 1) { |
| 445 | /* |
| 446 | * If we have to flush more than one page, flush all |
| 447 | * TLB entries for this domain |
| 448 | */ |
| 449 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 450 | s = 1; |
| 451 | } |
| 452 | |
| 453 | address &= PAGE_MASK; |
| 454 | |
| 455 | memset(cmd, 0, sizeof(*cmd)); |
| 456 | cmd->data[1] |= domid; |
| 457 | cmd->data[2] = lower_32_bits(address); |
| 458 | cmd->data[3] = upper_32_bits(address); |
| 459 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 460 | if (s) /* size bit - we flush more than one 4kb page */ |
| 461 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 462 | if (pde) /* PDE bit - we wan't flush everything not only the PTEs */ |
| 463 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 464 | } |
| 465 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame^] | 466 | static void build_inv_all(struct iommu_cmd *cmd) |
| 467 | { |
| 468 | memset(cmd, 0, sizeof(*cmd)); |
| 469 | CMD_SET_TYPE(cmd, CMD_INV_ALL); |
| 470 | } |
| 471 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 472 | /* |
| 473 | * Writes the command to the IOMMUs command buffer and informs the |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 474 | * hardware about the new command. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 475 | */ |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 476 | static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 477 | { |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 478 | u32 left, tail, head, next_tail; |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 479 | unsigned long flags; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 480 | |
Chris Wright | 549c90d | 2010-04-02 18:27:53 -0700 | [diff] [blame] | 481 | WARN_ON(iommu->cmd_buf_size & CMD_BUFFER_UNINITIALIZED); |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 482 | |
| 483 | again: |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 484 | spin_lock_irqsave(&iommu->lock, flags); |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 485 | |
| 486 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 487 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 488 | next_tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 489 | left = (head - next_tail) % iommu->cmd_buf_size; |
| 490 | |
| 491 | if (left <= 2) { |
| 492 | struct iommu_cmd sync_cmd; |
| 493 | volatile u64 sem = 0; |
| 494 | int ret; |
| 495 | |
| 496 | build_completion_wait(&sync_cmd, (u64)&sem); |
| 497 | copy_cmd_to_buffer(iommu, &sync_cmd, tail); |
| 498 | |
| 499 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 500 | |
| 501 | if ((ret = wait_on_sem(&sem)) != 0) |
| 502 | return ret; |
| 503 | |
| 504 | goto again; |
| 505 | } |
| 506 | |
| 507 | copy_cmd_to_buffer(iommu, cmd, tail); |
| 508 | |
| 509 | /* We need to sync now to make sure all commands are processed */ |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 510 | iommu->need_sync = true; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 511 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 512 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 513 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 514 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | /* |
| 518 | * This function queues a completion wait command into the command |
| 519 | * buffer of an IOMMU |
| 520 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 521 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 522 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 523 | struct iommu_cmd cmd; |
| 524 | volatile u64 sem = 0; |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 525 | int ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 526 | |
| 527 | if (!iommu->need_sync) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 528 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 529 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 530 | build_completion_wait(&cmd, (u64)&sem); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 531 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 532 | ret = iommu_queue_command(iommu, &cmd); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 533 | if (ret) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 534 | return ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 535 | |
Joerg Roedel | ac0ea6e | 2011-04-06 18:38:20 +0200 | [diff] [blame] | 536 | return wait_on_sem(&sem); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 537 | } |
| 538 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 539 | static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid) |
| 540 | { |
| 541 | struct iommu_cmd cmd; |
| 542 | |
| 543 | build_inv_dte(&cmd, devid); |
| 544 | |
| 545 | return iommu_queue_command(iommu, &cmd); |
| 546 | } |
| 547 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 548 | static void iommu_flush_dte_all(struct amd_iommu *iommu) |
| 549 | { |
| 550 | u32 devid; |
| 551 | |
| 552 | for (devid = 0; devid <= 0xffff; ++devid) |
| 553 | iommu_flush_dte(iommu, devid); |
| 554 | |
| 555 | iommu_completion_wait(iommu); |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * This function uses heavy locking and may disable irqs for some time. But |
| 560 | * this is no issue because it is only called during resume. |
| 561 | */ |
| 562 | static void iommu_flush_tlb_all(struct amd_iommu *iommu) |
| 563 | { |
| 564 | u32 dom_id; |
| 565 | |
| 566 | for (dom_id = 0; dom_id <= 0xffff; ++dom_id) { |
| 567 | struct iommu_cmd cmd; |
| 568 | build_inv_iommu_pages(&cmd, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, |
| 569 | dom_id, 1); |
| 570 | iommu_queue_command(iommu, &cmd); |
| 571 | } |
| 572 | |
| 573 | iommu_completion_wait(iommu); |
| 574 | } |
| 575 | |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame^] | 576 | static void iommu_flush_all(struct amd_iommu *iommu) |
| 577 | { |
| 578 | struct iommu_cmd cmd; |
| 579 | |
| 580 | build_inv_all(&cmd); |
| 581 | |
| 582 | iommu_queue_command(iommu, &cmd); |
| 583 | iommu_completion_wait(iommu); |
| 584 | } |
| 585 | |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 586 | void iommu_flush_all_caches(struct amd_iommu *iommu) |
| 587 | { |
Joerg Roedel | 58fc7f1 | 2011-04-11 11:13:24 +0200 | [diff] [blame^] | 588 | if (iommu_feature(iommu, FEATURE_IA)) { |
| 589 | iommu_flush_all(iommu); |
| 590 | } else { |
| 591 | iommu_flush_dte_all(iommu); |
| 592 | iommu_flush_tlb_all(iommu); |
| 593 | } |
Joerg Roedel | 7d0c5cc | 2011-04-07 08:16:10 +0200 | [diff] [blame] | 594 | } |
| 595 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 596 | /* |
| 597 | * Command send function for invalidating a device table entry |
| 598 | */ |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 599 | static int device_flush_dte(struct device *dev) |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 600 | { |
| 601 | struct amd_iommu *iommu; |
| 602 | u16 devid; |
| 603 | |
| 604 | devid = get_device_id(dev); |
| 605 | iommu = amd_iommu_rlookup_table[devid]; |
| 606 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 607 | return iommu_flush_dte(iommu, devid); |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 608 | } |
| 609 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 610 | /* |
| 611 | * TLB invalidation function which is called from the mapping functions. |
| 612 | * It invalidates a single PTE if the range to flush is within a single |
| 613 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 614 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 615 | static void __domain_flush_pages(struct protection_domain *domain, |
| 616 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 617 | { |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 618 | struct iommu_cmd cmd; |
| 619 | int ret = 0, i; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 620 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 621 | build_inv_iommu_pages(&cmd, address, size, domain->id, pde); |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 622 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 623 | for (i = 0; i < amd_iommus_present; ++i) { |
| 624 | if (!domain->dev_iommu[i]) |
| 625 | continue; |
| 626 | |
| 627 | /* |
| 628 | * Devices of this domain are behind this IOMMU |
| 629 | * We need a TLB flush |
| 630 | */ |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 631 | ret |= iommu_queue_command(amd_iommus[i], &cmd); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 632 | } |
| 633 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 634 | WARN_ON(ret); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 635 | } |
| 636 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 637 | static void domain_flush_pages(struct protection_domain *domain, |
| 638 | u64 address, size_t size) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 639 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 640 | __domain_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 641 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 642 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 643 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 644 | static void domain_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 645 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 646 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 647 | } |
| 648 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 649 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 650 | static void domain_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 651 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 652 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
| 653 | } |
| 654 | |
| 655 | static void domain_flush_complete(struct protection_domain *domain) |
| 656 | { |
| 657 | int i; |
| 658 | |
| 659 | for (i = 0; i < amd_iommus_present; ++i) { |
| 660 | if (!domain->dev_iommu[i]) |
| 661 | continue; |
| 662 | |
| 663 | /* |
| 664 | * Devices of this domain are behind this IOMMU |
| 665 | * We need to wait for completion of all commands. |
| 666 | */ |
| 667 | iommu_completion_wait(amd_iommus[i]); |
| 668 | } |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 669 | } |
| 670 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 671 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 672 | /* |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 673 | * This function flushes the DTEs for all devices in domain |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 674 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 675 | static void domain_flush_devices(struct protection_domain *domain) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 676 | { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 677 | struct iommu_dev_data *dev_data; |
| 678 | unsigned long flags; |
| 679 | |
| 680 | spin_lock_irqsave(&domain->lock, flags); |
| 681 | |
| 682 | list_for_each_entry(dev_data, &domain->dev_list, list) |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 683 | device_flush_dte(dev_data->dev); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 684 | |
| 685 | spin_unlock_irqrestore(&domain->lock, flags); |
| 686 | } |
| 687 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 688 | /**************************************************************************** |
| 689 | * |
| 690 | * The functions below are used the create the page table mappings for |
| 691 | * unity mapped regions. |
| 692 | * |
| 693 | ****************************************************************************/ |
| 694 | |
| 695 | /* |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 696 | * This function is used to add another level to an IO page table. Adding |
| 697 | * another level increases the size of the address space by 9 bits to a size up |
| 698 | * to 64 bits. |
| 699 | */ |
| 700 | static bool increase_address_space(struct protection_domain *domain, |
| 701 | gfp_t gfp) |
| 702 | { |
| 703 | u64 *pte; |
| 704 | |
| 705 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 706 | /* address space already 64 bit large */ |
| 707 | return false; |
| 708 | |
| 709 | pte = (void *)get_zeroed_page(gfp); |
| 710 | if (!pte) |
| 711 | return false; |
| 712 | |
| 713 | *pte = PM_LEVEL_PDE(domain->mode, |
| 714 | virt_to_phys(domain->pt_root)); |
| 715 | domain->pt_root = pte; |
| 716 | domain->mode += 1; |
| 717 | domain->updated = true; |
| 718 | |
| 719 | return true; |
| 720 | } |
| 721 | |
| 722 | static u64 *alloc_pte(struct protection_domain *domain, |
| 723 | unsigned long address, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 724 | unsigned long page_size, |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 725 | u64 **pte_page, |
| 726 | gfp_t gfp) |
| 727 | { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 728 | int level, end_lvl; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 729 | u64 *pte, *page; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 730 | |
| 731 | BUG_ON(!is_power_of_2(page_size)); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 732 | |
| 733 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 734 | increase_address_space(domain, gfp); |
| 735 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 736 | level = domain->mode - 1; |
| 737 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 738 | address = PAGE_SIZE_ALIGN(address, page_size); |
| 739 | end_lvl = PAGE_SIZE_LEVEL(page_size); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 740 | |
| 741 | while (level > end_lvl) { |
| 742 | if (!IOMMU_PTE_PRESENT(*pte)) { |
| 743 | page = (u64 *)get_zeroed_page(gfp); |
| 744 | if (!page) |
| 745 | return NULL; |
| 746 | *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 747 | } |
| 748 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 749 | /* No level skipping support yet */ |
| 750 | if (PM_PTE_LEVEL(*pte) != level) |
| 751 | return NULL; |
| 752 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 753 | level -= 1; |
| 754 | |
| 755 | pte = IOMMU_PTE_PAGE(*pte); |
| 756 | |
| 757 | if (pte_page && level == end_lvl) |
| 758 | *pte_page = pte; |
| 759 | |
| 760 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 761 | } |
| 762 | |
| 763 | return pte; |
| 764 | } |
| 765 | |
| 766 | /* |
| 767 | * This function checks if there is a PTE for a given dma address. If |
| 768 | * there is one, it returns the pointer to it. |
| 769 | */ |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 770 | static u64 *fetch_pte(struct protection_domain *domain, unsigned long address) |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 771 | { |
| 772 | int level; |
| 773 | u64 *pte; |
| 774 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 775 | if (address > PM_LEVEL_SIZE(domain->mode)) |
| 776 | return NULL; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 777 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 778 | level = domain->mode - 1; |
| 779 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 780 | |
| 781 | while (level > 0) { |
| 782 | |
| 783 | /* Not Present */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 784 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 785 | return NULL; |
| 786 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 787 | /* Large PTE */ |
| 788 | if (PM_PTE_LEVEL(*pte) == 0x07) { |
| 789 | unsigned long pte_mask, __pte; |
| 790 | |
| 791 | /* |
| 792 | * If we have a series of large PTEs, make |
| 793 | * sure to return a pointer to the first one. |
| 794 | */ |
| 795 | pte_mask = PTE_PAGE_SIZE(*pte); |
| 796 | pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1); |
| 797 | __pte = ((unsigned long)pte) & pte_mask; |
| 798 | |
| 799 | return (u64 *)__pte; |
| 800 | } |
| 801 | |
| 802 | /* No level skipping support yet */ |
| 803 | if (PM_PTE_LEVEL(*pte) != level) |
| 804 | return NULL; |
| 805 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 806 | level -= 1; |
| 807 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 808 | /* Walk to the next level */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 809 | pte = IOMMU_PTE_PAGE(*pte); |
| 810 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | return pte; |
| 814 | } |
| 815 | |
| 816 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 817 | * Generic mapping functions. It maps a physical address into a DMA |
| 818 | * address space. It allocates the page table pages if necessary. |
| 819 | * In the future it can be extended to a generic mapping function |
| 820 | * supporting all features of AMD IOMMU page tables like level skipping |
| 821 | * and full 64 bit address spaces. |
| 822 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 823 | static int iommu_map_page(struct protection_domain *dom, |
| 824 | unsigned long bus_addr, |
| 825 | unsigned long phys_addr, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 826 | int prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 827 | unsigned long page_size) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 828 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 829 | u64 __pte, *pte; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 830 | int i, count; |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 831 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 832 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 833 | return -EINVAL; |
| 834 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 835 | bus_addr = PAGE_ALIGN(bus_addr); |
| 836 | phys_addr = PAGE_ALIGN(phys_addr); |
| 837 | count = PAGE_SIZE_PTE_COUNT(page_size); |
| 838 | pte = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 839 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 840 | for (i = 0; i < count; ++i) |
| 841 | if (IOMMU_PTE_PRESENT(pte[i])) |
| 842 | return -EBUSY; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 843 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 844 | if (page_size > PAGE_SIZE) { |
| 845 | __pte = PAGE_SIZE_PTE(phys_addr, page_size); |
| 846 | __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 847 | } else |
| 848 | __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 849 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 850 | if (prot & IOMMU_PROT_IR) |
| 851 | __pte |= IOMMU_PTE_IR; |
| 852 | if (prot & IOMMU_PROT_IW) |
| 853 | __pte |= IOMMU_PTE_IW; |
| 854 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 855 | for (i = 0; i < count; ++i) |
| 856 | pte[i] = __pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 857 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 858 | update_domain(dom); |
| 859 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 860 | return 0; |
| 861 | } |
| 862 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 863 | static unsigned long iommu_unmap_page(struct protection_domain *dom, |
| 864 | unsigned long bus_addr, |
| 865 | unsigned long page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 866 | { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 867 | unsigned long long unmap_size, unmapped; |
| 868 | u64 *pte; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 869 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 870 | BUG_ON(!is_power_of_2(page_size)); |
| 871 | |
| 872 | unmapped = 0; |
| 873 | |
| 874 | while (unmapped < page_size) { |
| 875 | |
| 876 | pte = fetch_pte(dom, bus_addr); |
| 877 | |
| 878 | if (!pte) { |
| 879 | /* |
| 880 | * No PTE for this address |
| 881 | * move forward in 4kb steps |
| 882 | */ |
| 883 | unmap_size = PAGE_SIZE; |
| 884 | } else if (PM_PTE_LEVEL(*pte) == 0) { |
| 885 | /* 4kb PTE found for this address */ |
| 886 | unmap_size = PAGE_SIZE; |
| 887 | *pte = 0ULL; |
| 888 | } else { |
| 889 | int count, i; |
| 890 | |
| 891 | /* Large PTE found which maps this address */ |
| 892 | unmap_size = PTE_PAGE_SIZE(*pte); |
| 893 | count = PAGE_SIZE_PTE_COUNT(unmap_size); |
| 894 | for (i = 0; i < count; i++) |
| 895 | pte[i] = 0ULL; |
| 896 | } |
| 897 | |
| 898 | bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size; |
| 899 | unmapped += unmap_size; |
| 900 | } |
| 901 | |
| 902 | BUG_ON(!is_power_of_2(unmapped)); |
| 903 | |
| 904 | return unmapped; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 905 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 906 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 907 | /* |
| 908 | * This function checks if a specific unity mapping entry is needed for |
| 909 | * this specific IOMMU. |
| 910 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 911 | static int iommu_for_unity_map(struct amd_iommu *iommu, |
| 912 | struct unity_map_entry *entry) |
| 913 | { |
| 914 | u16 bdf, i; |
| 915 | |
| 916 | for (i = entry->devid_start; i <= entry->devid_end; ++i) { |
| 917 | bdf = amd_iommu_alias_table[i]; |
| 918 | if (amd_iommu_rlookup_table[bdf] == iommu) |
| 919 | return 1; |
| 920 | } |
| 921 | |
| 922 | return 0; |
| 923 | } |
| 924 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 925 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 926 | * This function actually applies the mapping to the page table of the |
| 927 | * dma_ops domain. |
| 928 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 929 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 930 | struct unity_map_entry *e) |
| 931 | { |
| 932 | u64 addr; |
| 933 | int ret; |
| 934 | |
| 935 | for (addr = e->address_start; addr < e->address_end; |
| 936 | addr += PAGE_SIZE) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 937 | ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 938 | PAGE_SIZE); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 939 | if (ret) |
| 940 | return ret; |
| 941 | /* |
| 942 | * if unity mapping is in aperture range mark the page |
| 943 | * as allocated in the aperture |
| 944 | */ |
| 945 | if (addr < dma_dom->aperture_size) |
Joerg Roedel | c323956 | 2009-05-12 10:56:44 +0200 | [diff] [blame] | 946 | __set_bit(addr >> PAGE_SHIFT, |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 947 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 953 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 954 | * Init the unity mappings for a specific IOMMU in the system |
| 955 | * |
| 956 | * Basically iterates over all unity mapping entries and applies them to |
| 957 | * the default domain DMA of that IOMMU if necessary. |
| 958 | */ |
| 959 | static int iommu_init_unity_mappings(struct amd_iommu *iommu) |
| 960 | { |
| 961 | struct unity_map_entry *entry; |
| 962 | int ret; |
| 963 | |
| 964 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 965 | if (!iommu_for_unity_map(iommu, entry)) |
| 966 | continue; |
| 967 | ret = dma_ops_unity_map(iommu->default_dom, entry); |
| 968 | if (ret) |
| 969 | return ret; |
| 970 | } |
| 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 976 | * Inits the unity mappings required for a specific device |
| 977 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 978 | static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, |
| 979 | u16 devid) |
| 980 | { |
| 981 | struct unity_map_entry *e; |
| 982 | int ret; |
| 983 | |
| 984 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 985 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 986 | continue; |
| 987 | ret = dma_ops_unity_map(dma_dom, e); |
| 988 | if (ret) |
| 989 | return ret; |
| 990 | } |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 995 | /**************************************************************************** |
| 996 | * |
| 997 | * The next functions belong to the address allocator for the dma_ops |
| 998 | * interface functions. They work like the allocators in the other IOMMU |
| 999 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 1000 | * the aperture. Maybe it could be enhanced in the future to a more |
| 1001 | * efficient allocator. |
| 1002 | * |
| 1003 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1004 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1005 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1006 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1007 | * |
| 1008 | * called with domain->lock held |
| 1009 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1010 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1011 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 1012 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 1013 | * ranges. |
| 1014 | */ |
| 1015 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 1016 | unsigned long start_page, |
| 1017 | unsigned int pages) |
| 1018 | { |
| 1019 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
| 1020 | |
| 1021 | if (start_page + pages > last_page) |
| 1022 | pages = last_page - start_page; |
| 1023 | |
| 1024 | for (i = start_page; i < start_page + pages; ++i) { |
| 1025 | int index = i / APERTURE_RANGE_PAGES; |
| 1026 | int page = i % APERTURE_RANGE_PAGES; |
| 1027 | __set_bit(page, dom->aperture[index]->bitmap); |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1032 | * This function is used to add a new aperture range to an existing |
| 1033 | * aperture in case of dma_ops domain allocation or address allocation |
| 1034 | * failure. |
| 1035 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1036 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1037 | bool populate, gfp_t gfp) |
| 1038 | { |
| 1039 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1040 | struct amd_iommu *iommu; |
Joerg Roedel | d91afd1 | 2010-01-22 16:40:20 +0100 | [diff] [blame] | 1041 | unsigned long i; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1042 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 1043 | #ifdef CONFIG_IOMMU_STRESS |
| 1044 | populate = false; |
| 1045 | #endif |
| 1046 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1047 | if (index >= APERTURE_MAX_RANGES) |
| 1048 | return -ENOMEM; |
| 1049 | |
| 1050 | dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp); |
| 1051 | if (!dma_dom->aperture[index]) |
| 1052 | return -ENOMEM; |
| 1053 | |
| 1054 | dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp); |
| 1055 | if (!dma_dom->aperture[index]->bitmap) |
| 1056 | goto out_free; |
| 1057 | |
| 1058 | dma_dom->aperture[index]->offset = dma_dom->aperture_size; |
| 1059 | |
| 1060 | if (populate) { |
| 1061 | unsigned long address = dma_dom->aperture_size; |
| 1062 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 1063 | u64 *pte, *pte_page; |
| 1064 | |
| 1065 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1066 | pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1067 | &pte_page, gfp); |
| 1068 | if (!pte) |
| 1069 | goto out_free; |
| 1070 | |
| 1071 | dma_dom->aperture[index]->pte_pages[i] = pte_page; |
| 1072 | |
| 1073 | address += APERTURE_RANGE_SIZE / 64; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
| 1078 | |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1079 | /* Initialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1080 | for_each_iommu(iommu) { |
| 1081 | if (iommu->exclusion_start && |
| 1082 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 1083 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 1084 | unsigned long startpage; |
| 1085 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 1086 | iommu->exclusion_length, |
| 1087 | PAGE_SIZE); |
| 1088 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 1089 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 1090 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | /* |
| 1094 | * Check for areas already mapped as present in the new aperture |
| 1095 | * range and mark those pages as reserved in the allocator. Such |
| 1096 | * mappings may already exist as a result of requested unity |
| 1097 | * mappings for devices. |
| 1098 | */ |
| 1099 | for (i = dma_dom->aperture[index]->offset; |
| 1100 | i < dma_dom->aperture_size; |
| 1101 | i += PAGE_SIZE) { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1102 | u64 *pte = fetch_pte(&dma_dom->domain, i); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1103 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 1104 | continue; |
| 1105 | |
| 1106 | dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1); |
| 1107 | } |
| 1108 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1109 | update_domain(&dma_dom->domain); |
| 1110 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1111 | return 0; |
| 1112 | |
| 1113 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1114 | update_domain(&dma_dom->domain); |
| 1115 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1116 | free_page((unsigned long)dma_dom->aperture[index]->bitmap); |
| 1117 | |
| 1118 | kfree(dma_dom->aperture[index]); |
| 1119 | dma_dom->aperture[index] = NULL; |
| 1120 | |
| 1121 | return -ENOMEM; |
| 1122 | } |
| 1123 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1124 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 1125 | struct dma_ops_domain *dom, |
| 1126 | unsigned int pages, |
| 1127 | unsigned long align_mask, |
| 1128 | u64 dma_mask, |
| 1129 | unsigned long start) |
| 1130 | { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1131 | unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1132 | int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 1133 | int i = start >> APERTURE_RANGE_SHIFT; |
| 1134 | unsigned long boundary_size; |
| 1135 | unsigned long address = -1; |
| 1136 | unsigned long limit; |
| 1137 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1138 | next_bit >>= PAGE_SHIFT; |
| 1139 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1140 | boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
| 1141 | PAGE_SIZE) >> PAGE_SHIFT; |
| 1142 | |
| 1143 | for (;i < max_index; ++i) { |
| 1144 | unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; |
| 1145 | |
| 1146 | if (dom->aperture[i]->offset >= dma_mask) |
| 1147 | break; |
| 1148 | |
| 1149 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 1150 | dma_mask >> PAGE_SHIFT); |
| 1151 | |
| 1152 | address = iommu_area_alloc(dom->aperture[i]->bitmap, |
| 1153 | limit, next_bit, pages, 0, |
| 1154 | boundary_size, align_mask); |
| 1155 | if (address != -1) { |
| 1156 | address = dom->aperture[i]->offset + |
| 1157 | (address << PAGE_SHIFT); |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1158 | dom->next_address = address + (pages << PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1159 | break; |
| 1160 | } |
| 1161 | |
| 1162 | next_bit = 0; |
| 1163 | } |
| 1164 | |
| 1165 | return address; |
| 1166 | } |
| 1167 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1168 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 1169 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1170 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1171 | unsigned long align_mask, |
| 1172 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1173 | { |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1174 | unsigned long address; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1175 | |
Joerg Roedel | fe16f08 | 2009-05-22 12:27:53 +0200 | [diff] [blame] | 1176 | #ifdef CONFIG_IOMMU_STRESS |
| 1177 | dom->next_address = 0; |
| 1178 | dom->need_flush = true; |
| 1179 | #endif |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1180 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1181 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1182 | dma_mask, dom->next_address); |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1183 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1184 | if (address == -1) { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1185 | dom->next_address = 0; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1186 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
| 1187 | dma_mask, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1188 | dom->need_flush = true; |
| 1189 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1190 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1191 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1192 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1193 | |
| 1194 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 1195 | |
| 1196 | return address; |
| 1197 | } |
| 1198 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1199 | /* |
| 1200 | * The address free function. |
| 1201 | * |
| 1202 | * called with domain->lock held |
| 1203 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1204 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 1205 | unsigned long address, |
| 1206 | unsigned int pages) |
| 1207 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1208 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 1209 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1210 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1211 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 1212 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 1213 | #ifdef CONFIG_IOMMU_STRESS |
| 1214 | if (i < 4) |
| 1215 | return; |
| 1216 | #endif |
| 1217 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1218 | if (address >= dom->next_address) |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1219 | dom->need_flush = true; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1220 | |
| 1221 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1222 | |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 1223 | bitmap_clear(range->bitmap, address, pages); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1224 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1225 | } |
| 1226 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1227 | /**************************************************************************** |
| 1228 | * |
| 1229 | * The next functions belong to the domain allocation. A domain is |
| 1230 | * allocated for every IOMMU as the default domain. If device isolation |
| 1231 | * is enabled, every device get its own domain. The most important thing |
| 1232 | * about domains is the page table mapping the DMA address space they |
| 1233 | * contain. |
| 1234 | * |
| 1235 | ****************************************************************************/ |
| 1236 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1237 | /* |
| 1238 | * This function adds a protection domain to the global protection domain list |
| 1239 | */ |
| 1240 | static void add_domain_to_list(struct protection_domain *domain) |
| 1241 | { |
| 1242 | unsigned long flags; |
| 1243 | |
| 1244 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1245 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1246 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1247 | } |
| 1248 | |
| 1249 | /* |
| 1250 | * This function removes a protection domain to the global |
| 1251 | * protection domain list |
| 1252 | */ |
| 1253 | static void del_domain_from_list(struct protection_domain *domain) |
| 1254 | { |
| 1255 | unsigned long flags; |
| 1256 | |
| 1257 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1258 | list_del(&domain->list); |
| 1259 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1260 | } |
| 1261 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1262 | static u16 domain_id_alloc(void) |
| 1263 | { |
| 1264 | unsigned long flags; |
| 1265 | int id; |
| 1266 | |
| 1267 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1268 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1269 | BUG_ON(id == 0); |
| 1270 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1271 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1272 | else |
| 1273 | id = 0; |
| 1274 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1275 | |
| 1276 | return id; |
| 1277 | } |
| 1278 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1279 | static void domain_id_free(int id) |
| 1280 | { |
| 1281 | unsigned long flags; |
| 1282 | |
| 1283 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1284 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1285 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1286 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1287 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1288 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1289 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1290 | { |
| 1291 | int i, j; |
| 1292 | u64 *p1, *p2, *p3; |
| 1293 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1294 | p1 = domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1295 | |
| 1296 | if (!p1) |
| 1297 | return; |
| 1298 | |
| 1299 | for (i = 0; i < 512; ++i) { |
| 1300 | if (!IOMMU_PTE_PRESENT(p1[i])) |
| 1301 | continue; |
| 1302 | |
| 1303 | p2 = IOMMU_PTE_PAGE(p1[i]); |
Joerg Roedel | 3cc3d84 | 2008-12-04 16:44:31 +0100 | [diff] [blame] | 1304 | for (j = 0; j < 512; ++j) { |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1305 | if (!IOMMU_PTE_PRESENT(p2[j])) |
| 1306 | continue; |
| 1307 | p3 = IOMMU_PTE_PAGE(p2[j]); |
| 1308 | free_page((unsigned long)p3); |
| 1309 | } |
| 1310 | |
| 1311 | free_page((unsigned long)p2); |
| 1312 | } |
| 1313 | |
| 1314 | free_page((unsigned long)p1); |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1315 | |
| 1316 | domain->pt_root = NULL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1317 | } |
| 1318 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1319 | /* |
| 1320 | * Free a domain, only used if something went wrong in the |
| 1321 | * allocation path and we need to free an already allocated page table |
| 1322 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1323 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1324 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1325 | int i; |
| 1326 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1327 | if (!dom) |
| 1328 | return; |
| 1329 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1330 | del_domain_from_list(&dom->domain); |
| 1331 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1332 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1333 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1334 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1335 | if (!dom->aperture[i]) |
| 1336 | continue; |
| 1337 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 1338 | kfree(dom->aperture[i]); |
| 1339 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1340 | |
| 1341 | kfree(dom); |
| 1342 | } |
| 1343 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1344 | /* |
| 1345 | * Allocates a new protection domain usable for the dma_ops functions. |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1346 | * It also initializes the page table and the address allocator data |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1347 | * structures required for the dma_ops interface |
| 1348 | */ |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1349 | static struct dma_ops_domain *dma_ops_domain_alloc(void) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1350 | { |
| 1351 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1352 | |
| 1353 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 1354 | if (!dma_dom) |
| 1355 | return NULL; |
| 1356 | |
| 1357 | spin_lock_init(&dma_dom->domain.lock); |
| 1358 | |
| 1359 | dma_dom->domain.id = domain_id_alloc(); |
| 1360 | if (dma_dom->domain.id == 0) |
| 1361 | goto free_dma_dom; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1362 | INIT_LIST_HEAD(&dma_dom->domain.dev_list); |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 1363 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1364 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 1365 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1366 | dma_dom->domain.priv = dma_dom; |
| 1367 | if (!dma_dom->domain.pt_root) |
| 1368 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1369 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1370 | dma_dom->need_flush = false; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1371 | dma_dom->target_dev = 0xffff; |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1372 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1373 | add_domain_to_list(&dma_dom->domain); |
| 1374 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1375 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1376 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1377 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1378 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1379 | * mark the first page as allocated so we never return 0 as |
| 1380 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1381 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1382 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1383 | dma_dom->next_address = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1384 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1385 | |
| 1386 | return dma_dom; |
| 1387 | |
| 1388 | free_dma_dom: |
| 1389 | dma_ops_domain_free(dma_dom); |
| 1390 | |
| 1391 | return NULL; |
| 1392 | } |
| 1393 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1394 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1395 | * little helper function to check whether a given protection domain is a |
| 1396 | * dma_ops domain |
| 1397 | */ |
| 1398 | static bool dma_ops_domain(struct protection_domain *domain) |
| 1399 | { |
| 1400 | return domain->flags & PD_DMA_OPS_MASK; |
| 1401 | } |
| 1402 | |
Joerg Roedel | 407d733 | 2009-09-02 16:07:00 +0200 | [diff] [blame] | 1403 | static void set_dte_entry(u16 devid, struct protection_domain *domain) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1404 | { |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1405 | u64 pte_root = virt_to_phys(domain->pt_root); |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 1406 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 1407 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 1408 | << DEV_ENTRY_MODE_SHIFT; |
| 1409 | 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] | 1410 | |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1411 | amd_iommu_dev_table[devid].data[2] = domain->id; |
Joerg Roedel | aa879ff | 2009-08-31 16:01:48 +0200 | [diff] [blame] | 1412 | amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); |
| 1413 | amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1414 | } |
| 1415 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1416 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1417 | { |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1418 | /* remove entry from the device table seen by the hardware */ |
| 1419 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 1420 | amd_iommu_dev_table[devid].data[1] = 0; |
| 1421 | amd_iommu_dev_table[devid].data[2] = 0; |
| 1422 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1423 | amd_iommu_apply_erratum_63(devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1424 | } |
| 1425 | |
| 1426 | static void do_attach(struct device *dev, struct protection_domain *domain) |
| 1427 | { |
| 1428 | struct iommu_dev_data *dev_data; |
| 1429 | struct amd_iommu *iommu; |
| 1430 | u16 devid; |
| 1431 | |
| 1432 | devid = get_device_id(dev); |
| 1433 | iommu = amd_iommu_rlookup_table[devid]; |
| 1434 | dev_data = get_dev_data(dev); |
| 1435 | |
| 1436 | /* Update data structures */ |
| 1437 | dev_data->domain = domain; |
| 1438 | list_add(&dev_data->list, &domain->dev_list); |
| 1439 | set_dte_entry(devid, domain); |
| 1440 | |
| 1441 | /* Do reference counting */ |
| 1442 | domain->dev_iommu[iommu->index] += 1; |
| 1443 | domain->dev_cnt += 1; |
| 1444 | |
| 1445 | /* Flush the DTE entry */ |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1446 | device_flush_dte(dev); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1447 | } |
| 1448 | |
| 1449 | static void do_detach(struct device *dev) |
| 1450 | { |
| 1451 | struct iommu_dev_data *dev_data; |
| 1452 | struct amd_iommu *iommu; |
| 1453 | u16 devid; |
| 1454 | |
| 1455 | devid = get_device_id(dev); |
| 1456 | iommu = amd_iommu_rlookup_table[devid]; |
| 1457 | dev_data = get_dev_data(dev); |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1458 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1459 | /* decrease reference counters */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1460 | dev_data->domain->dev_iommu[iommu->index] -= 1; |
| 1461 | dev_data->domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1462 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1463 | /* Update data structures */ |
| 1464 | dev_data->domain = NULL; |
| 1465 | list_del(&dev_data->list); |
| 1466 | clear_dte_entry(devid); |
| 1467 | |
| 1468 | /* Flush the DTE entry */ |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1469 | device_flush_dte(dev); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1470 | } |
| 1471 | |
| 1472 | /* |
| 1473 | * If a device is not yet associated with a domain, this function does |
| 1474 | * assigns it visible for the hardware |
| 1475 | */ |
| 1476 | static int __attach_device(struct device *dev, |
| 1477 | struct protection_domain *domain) |
| 1478 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1479 | struct iommu_dev_data *dev_data, *alias_data; |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1480 | int ret; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1481 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1482 | dev_data = get_dev_data(dev); |
| 1483 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1484 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1485 | if (!alias_data) |
| 1486 | return -EINVAL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1487 | |
| 1488 | /* lock domain */ |
| 1489 | spin_lock(&domain->lock); |
| 1490 | |
| 1491 | /* Some sanity checks */ |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1492 | ret = -EBUSY; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1493 | if (alias_data->domain != NULL && |
| 1494 | alias_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1495 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1496 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1497 | if (dev_data->domain != NULL && |
| 1498 | dev_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1499 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1500 | |
| 1501 | /* Do real assignment */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1502 | if (dev_data->alias != dev) { |
| 1503 | alias_data = get_dev_data(dev_data->alias); |
| 1504 | if (alias_data->domain == NULL) |
| 1505 | do_attach(dev_data->alias, domain); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1506 | |
| 1507 | atomic_inc(&alias_data->bind); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1508 | } |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1509 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1510 | if (dev_data->domain == NULL) |
| 1511 | do_attach(dev, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1512 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1513 | atomic_inc(&dev_data->bind); |
| 1514 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1515 | ret = 0; |
| 1516 | |
| 1517 | out_unlock: |
| 1518 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1519 | /* ready */ |
| 1520 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1521 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1522 | return ret; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1523 | } |
| 1524 | |
| 1525 | /* |
| 1526 | * If a device is not yet associated with a domain, this function does |
| 1527 | * assigns it visible for the hardware |
| 1528 | */ |
| 1529 | static int attach_device(struct device *dev, |
| 1530 | struct protection_domain *domain) |
| 1531 | { |
| 1532 | unsigned long flags; |
| 1533 | int ret; |
| 1534 | |
| 1535 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1536 | ret = __attach_device(dev, domain); |
| 1537 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1538 | |
| 1539 | /* |
| 1540 | * We might boot into a crash-kernel here. The crashed kernel |
| 1541 | * left the caches in the IOMMU dirty. So we have to flush |
| 1542 | * here to evict all dirty stuff. |
| 1543 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1544 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1545 | |
| 1546 | return ret; |
| 1547 | } |
| 1548 | |
| 1549 | /* |
| 1550 | * Removes a device from a protection domain (unlocked) |
| 1551 | */ |
| 1552 | static void __detach_device(struct device *dev) |
| 1553 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1554 | struct iommu_dev_data *dev_data = get_dev_data(dev); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1555 | struct iommu_dev_data *alias_data; |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1556 | struct protection_domain *domain; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1557 | unsigned long flags; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1558 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1559 | BUG_ON(!dev_data->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1560 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1561 | domain = dev_data->domain; |
| 1562 | |
| 1563 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1564 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1565 | if (dev_data->alias != dev) { |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1566 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1567 | if (atomic_dec_and_test(&alias_data->bind)) |
| 1568 | do_detach(dev_data->alias); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1569 | } |
| 1570 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1571 | if (atomic_dec_and_test(&dev_data->bind)) |
| 1572 | do_detach(dev); |
| 1573 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1574 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1575 | |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1576 | /* |
| 1577 | * 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] | 1578 | * passthrough domain if it is detached from any other domain. |
| 1579 | * Make sure we can deassign from the pt_domain itself. |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1580 | */ |
Joerg Roedel | d3ad937 | 2010-01-22 17:55:27 +0100 | [diff] [blame] | 1581 | if (iommu_pass_through && |
| 1582 | (dev_data->domain == NULL && domain != pt_domain)) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1583 | __attach_device(dev, pt_domain); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | /* |
| 1587 | * Removes a device from a protection domain (with devtable_lock held) |
| 1588 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1589 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1590 | { |
| 1591 | unsigned long flags; |
| 1592 | |
| 1593 | /* lock device table */ |
| 1594 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1595 | __detach_device(dev); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1596 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1597 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1598 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1599 | /* |
| 1600 | * Find out the protection domain structure for a given PCI device. This |
| 1601 | * will give us the pointer to the page table root for example. |
| 1602 | */ |
| 1603 | static struct protection_domain *domain_for_device(struct device *dev) |
| 1604 | { |
| 1605 | struct protection_domain *dom; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1606 | struct iommu_dev_data *dev_data, *alias_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1607 | unsigned long flags; |
| 1608 | u16 devid, alias; |
| 1609 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1610 | devid = get_device_id(dev); |
| 1611 | alias = amd_iommu_alias_table[devid]; |
| 1612 | dev_data = get_dev_data(dev); |
| 1613 | alias_data = get_dev_data(dev_data->alias); |
| 1614 | if (!alias_data) |
| 1615 | return NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1616 | |
| 1617 | read_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1618 | dom = dev_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1619 | if (dom == NULL && |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1620 | alias_data->domain != NULL) { |
| 1621 | __attach_device(dev, alias_data->domain); |
| 1622 | dom = alias_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1623 | } |
| 1624 | |
| 1625 | read_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1626 | |
| 1627 | return dom; |
| 1628 | } |
| 1629 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1630 | static int device_change_notifier(struct notifier_block *nb, |
| 1631 | unsigned long action, void *data) |
| 1632 | { |
| 1633 | struct device *dev = data; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1634 | u16 devid; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1635 | struct protection_domain *domain; |
| 1636 | struct dma_ops_domain *dma_domain; |
| 1637 | struct amd_iommu *iommu; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1638 | unsigned long flags; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1639 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1640 | if (!check_device(dev)) |
| 1641 | return 0; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1642 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1643 | devid = get_device_id(dev); |
| 1644 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1645 | |
| 1646 | switch (action) { |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 1647 | case BUS_NOTIFY_UNBOUND_DRIVER: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1648 | |
| 1649 | domain = domain_for_device(dev); |
| 1650 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1651 | if (!domain) |
| 1652 | goto out; |
Joerg Roedel | a1ca331 | 2009-09-01 12:22:22 +0200 | [diff] [blame] | 1653 | if (iommu_pass_through) |
| 1654 | break; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1655 | detach_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1656 | break; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1657 | case BUS_NOTIFY_ADD_DEVICE: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1658 | |
| 1659 | iommu_init_device(dev); |
| 1660 | |
| 1661 | domain = domain_for_device(dev); |
| 1662 | |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1663 | /* allocate a protection domain if a device is added */ |
| 1664 | dma_domain = find_protection_domain(devid); |
| 1665 | if (dma_domain) |
| 1666 | goto out; |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1667 | dma_domain = dma_ops_domain_alloc(); |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1668 | if (!dma_domain) |
| 1669 | goto out; |
| 1670 | dma_domain->target_dev = devid; |
| 1671 | |
| 1672 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 1673 | list_add_tail(&dma_domain->list, &iommu_pd_list); |
| 1674 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 1675 | |
| 1676 | break; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1677 | case BUS_NOTIFY_DEL_DEVICE: |
| 1678 | |
| 1679 | iommu_uninit_device(dev); |
| 1680 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1681 | default: |
| 1682 | goto out; |
| 1683 | } |
| 1684 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 1685 | device_flush_dte(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1686 | iommu_completion_wait(iommu); |
| 1687 | |
| 1688 | out: |
| 1689 | return 0; |
| 1690 | } |
| 1691 | |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 1692 | static struct notifier_block device_nb = { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1693 | .notifier_call = device_change_notifier, |
| 1694 | }; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1695 | |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 1696 | void amd_iommu_init_notifier(void) |
| 1697 | { |
| 1698 | bus_register_notifier(&pci_bus_type, &device_nb); |
| 1699 | } |
| 1700 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1701 | /***************************************************************************** |
| 1702 | * |
| 1703 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 1704 | * |
| 1705 | *****************************************************************************/ |
| 1706 | |
| 1707 | /* |
| 1708 | * In the dma_ops path we only have the struct device. This function |
| 1709 | * finds the corresponding IOMMU, the protection domain and the |
| 1710 | * requestor id for a given device. |
| 1711 | * If the device is not yet associated with a domain this is also done |
| 1712 | * in this function. |
| 1713 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1714 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1715 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1716 | struct protection_domain *domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1717 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1718 | u16 devid = get_device_id(dev); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1719 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1720 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1721 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1722 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1723 | domain = domain_for_device(dev); |
| 1724 | if (domain != NULL && !dma_ops_domain(domain)) |
| 1725 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1726 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1727 | if (domain != NULL) |
| 1728 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1729 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1730 | /* Device not bount yet - bind it */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1731 | dma_dom = find_protection_domain(devid); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1732 | if (!dma_dom) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1733 | dma_dom = amd_iommu_rlookup_table[devid]->default_dom; |
| 1734 | attach_device(dev, &dma_dom->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1735 | DUMP_printk("Using protection domain %d for device %s\n", |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1736 | dma_dom->domain.id, dev_name(dev)); |
Joerg Roedel | f91ba19 | 2008-11-25 12:56:12 +0100 | [diff] [blame] | 1737 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1738 | return &dma_dom->domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1739 | } |
| 1740 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1741 | static void update_device_table(struct protection_domain *domain) |
| 1742 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1743 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1744 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1745 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
| 1746 | u16 devid = get_device_id(dev_data->dev); |
| 1747 | set_dte_entry(devid, domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1748 | } |
| 1749 | } |
| 1750 | |
| 1751 | static void update_domain(struct protection_domain *domain) |
| 1752 | { |
| 1753 | if (!domain->updated) |
| 1754 | return; |
| 1755 | |
| 1756 | update_device_table(domain); |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1757 | |
| 1758 | domain_flush_devices(domain); |
| 1759 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1760 | |
| 1761 | domain->updated = false; |
| 1762 | } |
| 1763 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1764 | /* |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1765 | * This function fetches the PTE for a given address in the aperture |
| 1766 | */ |
| 1767 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 1768 | unsigned long address) |
| 1769 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1770 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1771 | u64 *pte, *pte_page; |
| 1772 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1773 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1774 | if (!aperture) |
| 1775 | return NULL; |
| 1776 | |
| 1777 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1778 | if (!pte) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1779 | pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1780 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1781 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 1782 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1783 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1784 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1785 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1786 | |
| 1787 | return pte; |
| 1788 | } |
| 1789 | |
| 1790 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1791 | * This is the generic map function. It maps one 4kb page at paddr to |
| 1792 | * the given address in the DMA address space for the domain. |
| 1793 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1794 | 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] | 1795 | unsigned long address, |
| 1796 | phys_addr_t paddr, |
| 1797 | int direction) |
| 1798 | { |
| 1799 | u64 *pte, __pte; |
| 1800 | |
| 1801 | WARN_ON(address > dom->aperture_size); |
| 1802 | |
| 1803 | paddr &= PAGE_MASK; |
| 1804 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1805 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1806 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1807 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1808 | |
| 1809 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1810 | |
| 1811 | if (direction == DMA_TO_DEVICE) |
| 1812 | __pte |= IOMMU_PTE_IR; |
| 1813 | else if (direction == DMA_FROM_DEVICE) |
| 1814 | __pte |= IOMMU_PTE_IW; |
| 1815 | else if (direction == DMA_BIDIRECTIONAL) |
| 1816 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 1817 | |
| 1818 | WARN_ON(*pte); |
| 1819 | |
| 1820 | *pte = __pte; |
| 1821 | |
| 1822 | return (dma_addr_t)address; |
| 1823 | } |
| 1824 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1825 | /* |
| 1826 | * The generic unmapping function for on page in the DMA address space. |
| 1827 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1828 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1829 | unsigned long address) |
| 1830 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1831 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1832 | u64 *pte; |
| 1833 | |
| 1834 | if (address >= dom->aperture_size) |
| 1835 | return; |
| 1836 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1837 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1838 | if (!aperture) |
| 1839 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1840 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1841 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 1842 | if (!pte) |
| 1843 | return; |
| 1844 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1845 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1846 | |
| 1847 | WARN_ON(!*pte); |
| 1848 | |
| 1849 | *pte = 0ULL; |
| 1850 | } |
| 1851 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1852 | /* |
| 1853 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 1854 | * contiguous memory region into DMA address space. It is used by all |
| 1855 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1856 | * Must be called with the domain lock held. |
| 1857 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1858 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1859 | struct dma_ops_domain *dma_dom, |
| 1860 | phys_addr_t paddr, |
| 1861 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1862 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1863 | bool align, |
| 1864 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1865 | { |
| 1866 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1867 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1868 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1869 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1870 | int i; |
| 1871 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1872 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1873 | paddr &= PAGE_MASK; |
| 1874 | |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 1875 | INC_STATS_COUNTER(total_map_requests); |
| 1876 | |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 1877 | if (pages > 1) |
| 1878 | INC_STATS_COUNTER(cross_page); |
| 1879 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1880 | if (align) |
| 1881 | align_mask = (1UL << get_order(size)) - 1; |
| 1882 | |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1883 | retry: |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1884 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 1885 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1886 | if (unlikely(address == DMA_ERROR_CODE)) { |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1887 | /* |
| 1888 | * setting next_address here will let the address |
| 1889 | * allocator only scan the new allocated range in the |
| 1890 | * first run. This is a small optimization. |
| 1891 | */ |
| 1892 | dma_dom->next_address = dma_dom->aperture_size; |
| 1893 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1894 | if (alloc_new_range(dma_dom, false, GFP_ATOMIC)) |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1895 | goto out; |
| 1896 | |
| 1897 | /* |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 1898 | * aperture was successfully enlarged by 128 MB, try |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1899 | * allocation again |
| 1900 | */ |
| 1901 | goto retry; |
| 1902 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1903 | |
| 1904 | start = address; |
| 1905 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1906 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1907 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1908 | goto out_unmap; |
| 1909 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1910 | paddr += PAGE_SIZE; |
| 1911 | start += PAGE_SIZE; |
| 1912 | } |
| 1913 | address += offset; |
| 1914 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1915 | ADD_STATS_COUNTER(alloced_io_mem, size); |
| 1916 | |
FUJITA Tomonori | afa9fdc | 2008-09-20 01:23:30 +0900 | [diff] [blame] | 1917 | if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1918 | domain_flush_tlb(&dma_dom->domain); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1919 | dma_dom->need_flush = false; |
Joerg Roedel | 318afd4 | 2009-11-23 18:32:38 +0100 | [diff] [blame] | 1920 | } else if (unlikely(amd_iommu_np_cache)) |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1921 | domain_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1922 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1923 | out: |
| 1924 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1925 | |
| 1926 | out_unmap: |
| 1927 | |
| 1928 | for (--i; i >= 0; --i) { |
| 1929 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1930 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1931 | } |
| 1932 | |
| 1933 | dma_ops_free_addresses(dma_dom, address, pages); |
| 1934 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1935 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1936 | } |
| 1937 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1938 | /* |
| 1939 | * Does the reverse of the __map_single function. Must be called with |
| 1940 | * the domain lock held too |
| 1941 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1942 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1943 | dma_addr_t dma_addr, |
| 1944 | size_t size, |
| 1945 | int dir) |
| 1946 | { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1947 | dma_addr_t flush_addr; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1948 | dma_addr_t i, start; |
| 1949 | unsigned int pages; |
| 1950 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1951 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 1952 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1953 | return; |
| 1954 | |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1955 | flush_addr = dma_addr; |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1956 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1957 | dma_addr &= PAGE_MASK; |
| 1958 | start = dma_addr; |
| 1959 | |
| 1960 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1961 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1962 | start += PAGE_SIZE; |
| 1963 | } |
| 1964 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1965 | SUB_STATS_COUNTER(alloced_io_mem, size); |
| 1966 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1967 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1968 | |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1969 | if (amd_iommu_unmap_flush || dma_dom->need_flush) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 1970 | domain_flush_pages(&dma_dom->domain, flush_addr, size); |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1971 | dma_dom->need_flush = false; |
| 1972 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1973 | } |
| 1974 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1975 | /* |
| 1976 | * The exported map_single function for dma_ops. |
| 1977 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1978 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 1979 | unsigned long offset, size_t size, |
| 1980 | enum dma_data_direction dir, |
| 1981 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1982 | { |
| 1983 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1984 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1985 | dma_addr_t addr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1986 | u64 dma_mask; |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1987 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1988 | |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 1989 | INC_STATS_COUNTER(cnt_map_single); |
| 1990 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1991 | domain = get_domain(dev); |
| 1992 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1993 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1994 | else if (IS_ERR(domain)) |
| 1995 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1996 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1997 | dma_mask = *dev->dma_mask; |
| 1998 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1999 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2000 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2001 | addr = __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2002 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2003 | if (addr == DMA_ERROR_CODE) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2004 | goto out; |
| 2005 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2006 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2007 | |
| 2008 | out: |
| 2009 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2010 | |
| 2011 | return addr; |
| 2012 | } |
| 2013 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2014 | /* |
| 2015 | * The exported unmap_single function for dma_ops. |
| 2016 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2017 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 2018 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2019 | { |
| 2020 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2021 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2022 | |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 2023 | INC_STATS_COUNTER(cnt_unmap_single); |
| 2024 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2025 | domain = get_domain(dev); |
| 2026 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2027 | return; |
| 2028 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2029 | spin_lock_irqsave(&domain->lock, flags); |
| 2030 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2031 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2032 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2033 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2034 | |
| 2035 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2036 | } |
| 2037 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2038 | /* |
| 2039 | * This is a special map_sg function which is used if we should map a |
| 2040 | * device which is not handled by an AMD IOMMU in the system. |
| 2041 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2042 | static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, |
| 2043 | int nelems, int dir) |
| 2044 | { |
| 2045 | struct scatterlist *s; |
| 2046 | int i; |
| 2047 | |
| 2048 | for_each_sg(sglist, s, nelems, i) { |
| 2049 | s->dma_address = (dma_addr_t)sg_phys(s); |
| 2050 | s->dma_length = s->length; |
| 2051 | } |
| 2052 | |
| 2053 | return nelems; |
| 2054 | } |
| 2055 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2056 | /* |
| 2057 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2058 | * lists). |
| 2059 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2060 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2061 | int nelems, enum dma_data_direction dir, |
| 2062 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2063 | { |
| 2064 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2065 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2066 | int i; |
| 2067 | struct scatterlist *s; |
| 2068 | phys_addr_t paddr; |
| 2069 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2070 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2071 | |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 2072 | INC_STATS_COUNTER(cnt_map_sg); |
| 2073 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2074 | domain = get_domain(dev); |
| 2075 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2076 | return map_sg_no_iommu(dev, sglist, nelems, dir); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2077 | else if (IS_ERR(domain)) |
| 2078 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2079 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2080 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2081 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2082 | spin_lock_irqsave(&domain->lock, flags); |
| 2083 | |
| 2084 | for_each_sg(sglist, s, nelems, i) { |
| 2085 | paddr = sg_phys(s); |
| 2086 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2087 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2088 | paddr, s->length, dir, false, |
| 2089 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2090 | |
| 2091 | if (s->dma_address) { |
| 2092 | s->dma_length = s->length; |
| 2093 | mapped_elems++; |
| 2094 | } else |
| 2095 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2096 | } |
| 2097 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2098 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2099 | |
| 2100 | out: |
| 2101 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2102 | |
| 2103 | return mapped_elems; |
| 2104 | unmap: |
| 2105 | for_each_sg(sglist, s, mapped_elems, i) { |
| 2106 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2107 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2108 | s->dma_length, dir); |
| 2109 | s->dma_address = s->dma_length = 0; |
| 2110 | } |
| 2111 | |
| 2112 | mapped_elems = 0; |
| 2113 | |
| 2114 | goto out; |
| 2115 | } |
| 2116 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2117 | /* |
| 2118 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2119 | * lists). |
| 2120 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2121 | static void unmap_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2122 | int nelems, enum dma_data_direction dir, |
| 2123 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2124 | { |
| 2125 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2126 | struct protection_domain *domain; |
| 2127 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2128 | int i; |
| 2129 | |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 2130 | INC_STATS_COUNTER(cnt_unmap_sg); |
| 2131 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2132 | domain = get_domain(dev); |
| 2133 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2134 | return; |
| 2135 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2136 | spin_lock_irqsave(&domain->lock, flags); |
| 2137 | |
| 2138 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2139 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2140 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2141 | s->dma_address = s->dma_length = 0; |
| 2142 | } |
| 2143 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2144 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2145 | |
| 2146 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2147 | } |
| 2148 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2149 | /* |
| 2150 | * The exported alloc_coherent function for dma_ops. |
| 2151 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2152 | static void *alloc_coherent(struct device *dev, size_t size, |
| 2153 | dma_addr_t *dma_addr, gfp_t flag) |
| 2154 | { |
| 2155 | unsigned long flags; |
| 2156 | void *virt_addr; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2157 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2158 | phys_addr_t paddr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2159 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2160 | |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 2161 | INC_STATS_COUNTER(cnt_alloc_coherent); |
| 2162 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2163 | domain = get_domain(dev); |
| 2164 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2165 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2166 | *dma_addr = __pa(virt_addr); |
| 2167 | return virt_addr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2168 | } else if (IS_ERR(domain)) |
| 2169 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2170 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2171 | dma_mask = dev->coherent_dma_mask; |
| 2172 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 2173 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2174 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2175 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2176 | if (!virt_addr) |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2177 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2178 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2179 | paddr = virt_to_phys(virt_addr); |
| 2180 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2181 | if (!dma_mask) |
| 2182 | dma_mask = *dev->dma_mask; |
| 2183 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2184 | spin_lock_irqsave(&domain->lock, flags); |
| 2185 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2186 | *dma_addr = __map_single(dev, domain->priv, paddr, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2187 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2188 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2189 | if (*dma_addr == DMA_ERROR_CODE) { |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2190 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2191 | goto out_free; |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2192 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2193 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2194 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2195 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2196 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2197 | |
| 2198 | return virt_addr; |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2199 | |
| 2200 | out_free: |
| 2201 | |
| 2202 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2203 | |
| 2204 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2205 | } |
| 2206 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2207 | /* |
| 2208 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2209 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2210 | static void free_coherent(struct device *dev, size_t size, |
| 2211 | void *virt_addr, dma_addr_t dma_addr) |
| 2212 | { |
| 2213 | unsigned long flags; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2214 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2215 | |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 2216 | INC_STATS_COUNTER(cnt_free_coherent); |
| 2217 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2218 | domain = get_domain(dev); |
| 2219 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2220 | goto free_mem; |
| 2221 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2222 | spin_lock_irqsave(&domain->lock, flags); |
| 2223 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2224 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2225 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2226 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2227 | |
| 2228 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2229 | |
| 2230 | free_mem: |
| 2231 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2232 | } |
| 2233 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2234 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2235 | * This function is called by the DMA layer to find out if we can handle a |
| 2236 | * particular device. It is part of the dma_ops. |
| 2237 | */ |
| 2238 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2239 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2240 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2241 | } |
| 2242 | |
| 2243 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2244 | * The function for pre-allocating protection domains. |
| 2245 | * |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2246 | * If the driver core informs the DMA layer if a driver grabs a device |
| 2247 | * we don't need to preallocate the protection domains anymore. |
| 2248 | * For now we have to. |
| 2249 | */ |
Jaswinder Singh Rajput | 0e93dd8 | 2008-12-29 21:45:22 +0530 | [diff] [blame] | 2250 | static void prealloc_protection_domains(void) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2251 | { |
| 2252 | struct pci_dev *dev = NULL; |
| 2253 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2254 | u16 devid; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2255 | |
Chris Wright | d18c69d | 2010-04-02 18:27:55 -0700 | [diff] [blame] | 2256 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2257 | |
| 2258 | /* Do we handle this device? */ |
| 2259 | if (!check_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2260 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2261 | |
| 2262 | /* Is there already any domain for it? */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2263 | if (domain_for_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2264 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2265 | |
| 2266 | devid = get_device_id(&dev->dev); |
| 2267 | |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2268 | dma_dom = dma_ops_domain_alloc(); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2269 | if (!dma_dom) |
| 2270 | continue; |
| 2271 | init_unity_mappings_for_device(dma_dom, devid); |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2272 | dma_dom->target_dev = devid; |
| 2273 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2274 | attach_device(&dev->dev, &dma_dom->domain); |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2275 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2276 | list_add_tail(&dma_dom->list, &iommu_pd_list); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2277 | } |
| 2278 | } |
| 2279 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2280 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2281 | .alloc_coherent = alloc_coherent, |
| 2282 | .free_coherent = free_coherent, |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2283 | .map_page = map_page, |
| 2284 | .unmap_page = unmap_page, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2285 | .map_sg = map_sg, |
| 2286 | .unmap_sg = unmap_sg, |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2287 | .dma_supported = amd_iommu_dma_supported, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2288 | }; |
| 2289 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2290 | /* |
| 2291 | * The function which clues the AMD IOMMU driver into dma_ops. |
| 2292 | */ |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 2293 | |
| 2294 | void __init amd_iommu_init_api(void) |
| 2295 | { |
| 2296 | register_iommu(&amd_iommu_ops); |
| 2297 | } |
| 2298 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2299 | int __init amd_iommu_init_dma_ops(void) |
| 2300 | { |
| 2301 | struct amd_iommu *iommu; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2302 | int ret; |
| 2303 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2304 | /* |
| 2305 | * first allocate a default protection domain for every IOMMU we |
| 2306 | * found in the system. Devices not assigned to any other |
| 2307 | * protection domain will be assigned to the default one. |
| 2308 | */ |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2309 | for_each_iommu(iommu) { |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2310 | iommu->default_dom = dma_ops_domain_alloc(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2311 | if (iommu->default_dom == NULL) |
| 2312 | return -ENOMEM; |
Joerg Roedel | e2dc14a | 2008-12-10 18:48:59 +0100 | [diff] [blame] | 2313 | iommu->default_dom->domain.flags |= PD_DEFAULT_MASK; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2314 | ret = iommu_init_unity_mappings(iommu); |
| 2315 | if (ret) |
| 2316 | goto free_domains; |
| 2317 | } |
| 2318 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2319 | /* |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2320 | * Pre-allocate the protection domains for each device. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2321 | */ |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2322 | prealloc_protection_domains(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2323 | |
| 2324 | iommu_detected = 1; |
FUJITA Tomonori | 75f1cdf | 2009-11-10 19:46:20 +0900 | [diff] [blame] | 2325 | swiotlb = 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2326 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2327 | /* Make the driver finally visible to the drivers */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2328 | dma_ops = &amd_iommu_dma_ops; |
| 2329 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 2330 | amd_iommu_stats_init(); |
| 2331 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2332 | return 0; |
| 2333 | |
| 2334 | free_domains: |
| 2335 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2336 | for_each_iommu(iommu) { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2337 | if (iommu->default_dom) |
| 2338 | dma_ops_domain_free(iommu->default_dom); |
| 2339 | } |
| 2340 | |
| 2341 | return ret; |
| 2342 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2343 | |
| 2344 | /***************************************************************************** |
| 2345 | * |
| 2346 | * The following functions belong to the exported interface of AMD IOMMU |
| 2347 | * |
| 2348 | * This interface allows access to lower level functions of the IOMMU |
| 2349 | * like protection domain handling and assignement of devices to domains |
| 2350 | * which is not possible with the dma_ops interface. |
| 2351 | * |
| 2352 | *****************************************************************************/ |
| 2353 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2354 | static void cleanup_domain(struct protection_domain *domain) |
| 2355 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2356 | struct iommu_dev_data *dev_data, *next; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2357 | unsigned long flags; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2358 | |
| 2359 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2360 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2361 | list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) { |
| 2362 | struct device *dev = dev_data->dev; |
| 2363 | |
Chris Wright | 04e856c | 2010-02-17 08:51:20 -0800 | [diff] [blame] | 2364 | __detach_device(dev); |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2365 | atomic_set(&dev_data->bind, 0); |
| 2366 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2367 | |
| 2368 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2369 | } |
| 2370 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2371 | static void protection_domain_free(struct protection_domain *domain) |
| 2372 | { |
| 2373 | if (!domain) |
| 2374 | return; |
| 2375 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2376 | del_domain_from_list(domain); |
| 2377 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2378 | if (domain->id) |
| 2379 | domain_id_free(domain->id); |
| 2380 | |
| 2381 | kfree(domain); |
| 2382 | } |
| 2383 | |
| 2384 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2385 | { |
| 2386 | struct protection_domain *domain; |
| 2387 | |
| 2388 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 2389 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2390 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2391 | |
| 2392 | spin_lock_init(&domain->lock); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2393 | mutex_init(&domain->api_lock); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2394 | domain->id = domain_id_alloc(); |
| 2395 | if (!domain->id) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2396 | goto out_err; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 2397 | INIT_LIST_HEAD(&domain->dev_list); |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2398 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2399 | add_domain_to_list(domain); |
| 2400 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2401 | return domain; |
| 2402 | |
| 2403 | out_err: |
| 2404 | kfree(domain); |
| 2405 | |
| 2406 | return NULL; |
| 2407 | } |
| 2408 | |
| 2409 | static int amd_iommu_domain_init(struct iommu_domain *dom) |
| 2410 | { |
| 2411 | struct protection_domain *domain; |
| 2412 | |
| 2413 | domain = protection_domain_alloc(); |
| 2414 | if (!domain) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2415 | goto out_free; |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2416 | |
| 2417 | domain->mode = PAGE_MODE_3_LEVEL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2418 | domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 2419 | if (!domain->pt_root) |
| 2420 | goto out_free; |
| 2421 | |
| 2422 | dom->priv = domain; |
| 2423 | |
| 2424 | return 0; |
| 2425 | |
| 2426 | out_free: |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2427 | protection_domain_free(domain); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2428 | |
| 2429 | return -ENOMEM; |
| 2430 | } |
| 2431 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2432 | static void amd_iommu_domain_destroy(struct iommu_domain *dom) |
| 2433 | { |
| 2434 | struct protection_domain *domain = dom->priv; |
| 2435 | |
| 2436 | if (!domain) |
| 2437 | return; |
| 2438 | |
| 2439 | if (domain->dev_cnt > 0) |
| 2440 | cleanup_domain(domain); |
| 2441 | |
| 2442 | BUG_ON(domain->dev_cnt != 0); |
| 2443 | |
| 2444 | free_pagetable(domain); |
| 2445 | |
Joerg Roedel | 8b408fe | 2010-03-08 14:20:07 +0100 | [diff] [blame] | 2446 | protection_domain_free(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2447 | |
| 2448 | dom->priv = NULL; |
| 2449 | } |
| 2450 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2451 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 2452 | struct device *dev) |
| 2453 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2454 | struct iommu_dev_data *dev_data = dev->archdata.iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2455 | struct amd_iommu *iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2456 | u16 devid; |
| 2457 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2458 | if (!check_device(dev)) |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2459 | return; |
| 2460 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2461 | devid = get_device_id(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2462 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2463 | if (dev_data->domain != NULL) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2464 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2465 | |
| 2466 | iommu = amd_iommu_rlookup_table[devid]; |
| 2467 | if (!iommu) |
| 2468 | return; |
| 2469 | |
Joerg Roedel | d8c1308 | 2011-04-06 18:51:26 +0200 | [diff] [blame] | 2470 | device_flush_dte(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2471 | iommu_completion_wait(iommu); |
| 2472 | } |
| 2473 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2474 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 2475 | struct device *dev) |
| 2476 | { |
| 2477 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2478 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2479 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2480 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2481 | u16 devid; |
| 2482 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2483 | if (!check_device(dev)) |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2484 | return -EINVAL; |
| 2485 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2486 | dev_data = dev->archdata.iommu; |
| 2487 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2488 | devid = get_device_id(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2489 | |
| 2490 | iommu = amd_iommu_rlookup_table[devid]; |
| 2491 | if (!iommu) |
| 2492 | return -EINVAL; |
| 2493 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2494 | if (dev_data->domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2495 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2496 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2497 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2498 | |
| 2499 | iommu_completion_wait(iommu); |
| 2500 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2501 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2502 | } |
| 2503 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2504 | static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova, |
| 2505 | phys_addr_t paddr, int gfp_order, int iommu_prot) |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2506 | { |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2507 | unsigned long page_size = 0x1000UL << gfp_order; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2508 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2509 | int prot = 0; |
| 2510 | int ret; |
| 2511 | |
| 2512 | if (iommu_prot & IOMMU_READ) |
| 2513 | prot |= IOMMU_PROT_IR; |
| 2514 | if (iommu_prot & IOMMU_WRITE) |
| 2515 | prot |= IOMMU_PROT_IW; |
| 2516 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2517 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 795e74f | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2518 | ret = iommu_map_page(domain, iova, paddr, prot, page_size); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2519 | mutex_unlock(&domain->api_lock); |
| 2520 | |
Joerg Roedel | 795e74f | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2521 | return ret; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2522 | } |
| 2523 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2524 | static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, |
| 2525 | int gfp_order) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2526 | { |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2527 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2528 | unsigned long page_size, unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2529 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2530 | page_size = 0x1000UL << gfp_order; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2531 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2532 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2533 | unmap_size = iommu_unmap_page(domain, iova, page_size); |
Joerg Roedel | 795e74f | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2534 | mutex_unlock(&domain->api_lock); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2535 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame] | 2536 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2537 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2538 | return get_order(unmap_size); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2539 | } |
| 2540 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2541 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
| 2542 | unsigned long iova) |
| 2543 | { |
| 2544 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2545 | unsigned long offset_mask; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2546 | phys_addr_t paddr; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2547 | u64 *pte, __pte; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2548 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 2549 | pte = fetch_pte(domain, iova); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2550 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 2551 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2552 | return 0; |
| 2553 | |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2554 | if (PM_PTE_LEVEL(*pte) == 0) |
| 2555 | offset_mask = PAGE_SIZE - 1; |
| 2556 | else |
| 2557 | offset_mask = PTE_PAGE_SIZE(*pte) - 1; |
| 2558 | |
| 2559 | __pte = *pte & PM_ADDR_MASK; |
| 2560 | paddr = (__pte & ~offset_mask) | (iova & offset_mask); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2561 | |
| 2562 | return paddr; |
| 2563 | } |
| 2564 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2565 | static int amd_iommu_domain_has_cap(struct iommu_domain *domain, |
| 2566 | unsigned long cap) |
| 2567 | { |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 2568 | switch (cap) { |
| 2569 | case IOMMU_CAP_CACHE_COHERENCY: |
| 2570 | return 1; |
| 2571 | } |
| 2572 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2573 | return 0; |
| 2574 | } |
| 2575 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2576 | static struct iommu_ops amd_iommu_ops = { |
| 2577 | .domain_init = amd_iommu_domain_init, |
| 2578 | .domain_destroy = amd_iommu_domain_destroy, |
| 2579 | .attach_dev = amd_iommu_attach_device, |
| 2580 | .detach_dev = amd_iommu_detach_device, |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2581 | .map = amd_iommu_map, |
| 2582 | .unmap = amd_iommu_unmap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2583 | .iova_to_phys = amd_iommu_iova_to_phys, |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2584 | .domain_has_cap = amd_iommu_domain_has_cap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2585 | }; |
| 2586 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2587 | /***************************************************************************** |
| 2588 | * |
| 2589 | * The next functions do a basic initialization of IOMMU for pass through |
| 2590 | * mode |
| 2591 | * |
| 2592 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 2593 | * DMA-API translation. |
| 2594 | * |
| 2595 | *****************************************************************************/ |
| 2596 | |
| 2597 | int __init amd_iommu_init_passthrough(void) |
| 2598 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2599 | struct amd_iommu *iommu; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2600 | struct pci_dev *dev = NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2601 | u16 devid; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2602 | |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 2603 | /* allocate passthrough domain */ |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2604 | pt_domain = protection_domain_alloc(); |
| 2605 | if (!pt_domain) |
| 2606 | return -ENOMEM; |
| 2607 | |
| 2608 | pt_domain->mode |= PAGE_MODE_NONE; |
| 2609 | |
Kulikov Vasiliy | 6c54aab | 2010-07-03 12:03:51 -0400 | [diff] [blame] | 2610 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2611 | if (!check_device(&dev->dev)) |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2612 | continue; |
| 2613 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2614 | devid = get_device_id(&dev->dev); |
| 2615 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2616 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2617 | if (!iommu) |
| 2618 | continue; |
| 2619 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2620 | attach_device(&dev->dev, pt_domain); |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2621 | } |
| 2622 | |
| 2623 | pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); |
| 2624 | |
| 2625 | return 0; |
| 2626 | } |