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 | d03f067 | 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 | d03f067 | 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 | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 384 | static void build_completion_wait(struct iommu_cmd *cmd, u64 address) |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 385 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 386 | WARN_ON(address & 0x7ULL); |
| 387 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 388 | memset(cmd, 0, sizeof(*cmd)); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 389 | cmd->data[0] = lower_32_bits(__pa(address)) | CMD_COMPL_WAIT_STORE_MASK; |
| 390 | cmd->data[1] = upper_32_bits(__pa(address)); |
| 391 | cmd->data[2] = 1; |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame] | 392 | CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); |
| 393 | } |
| 394 | |
Joerg Roedel | 94fe79e | 2011-04-06 11:07:21 +0200 | [diff] [blame] | 395 | static void build_inv_dte(struct iommu_cmd *cmd, u16 devid) |
| 396 | { |
| 397 | memset(cmd, 0, sizeof(*cmd)); |
| 398 | cmd->data[0] = devid; |
| 399 | CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY); |
| 400 | } |
| 401 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 402 | static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 403 | size_t size, u16 domid, int pde) |
| 404 | { |
| 405 | u64 pages; |
| 406 | int s; |
| 407 | |
| 408 | pages = iommu_num_pages(address, size, PAGE_SIZE); |
| 409 | s = 0; |
| 410 | |
| 411 | if (pages > 1) { |
| 412 | /* |
| 413 | * If we have to flush more than one page, flush all |
| 414 | * TLB entries for this domain |
| 415 | */ |
| 416 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 417 | s = 1; |
| 418 | } |
| 419 | |
| 420 | address &= PAGE_MASK; |
| 421 | |
| 422 | memset(cmd, 0, sizeof(*cmd)); |
| 423 | cmd->data[1] |= domid; |
| 424 | cmd->data[2] = lower_32_bits(address); |
| 425 | cmd->data[3] = upper_32_bits(address); |
| 426 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 427 | if (s) /* size bit - we flush more than one 4kb page */ |
| 428 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 429 | if (pde) /* PDE bit - we wan't flush everything not only the PTEs */ |
| 430 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 431 | } |
| 432 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 433 | /* |
| 434 | * Writes the command to the IOMMUs command buffer and informs the |
| 435 | * hardware about the new command. Must be called with iommu->lock held. |
| 436 | */ |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 437 | 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] | 438 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 439 | unsigned long flags; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 440 | u32 tail, head; |
| 441 | u8 *target; |
| 442 | |
Chris Wright | 549c90d | 2010-04-02 18:27:53 -0700 | [diff] [blame] | 443 | WARN_ON(iommu->cmd_buf_size & CMD_BUFFER_UNINITIALIZED); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 444 | spin_lock_irqsave(&iommu->lock, flags); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 445 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
Jiri Kosina | 8a7c5ef | 2008-08-19 02:13:55 +0200 | [diff] [blame] | 446 | target = iommu->cmd_buf + tail; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 447 | memcpy_toio(target, cmd, sizeof(*cmd)); |
| 448 | tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 449 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 450 | if (tail == head) |
| 451 | return -ENOMEM; |
| 452 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 453 | iommu->need_sync = true; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 454 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 455 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 456 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /* |
| 460 | * This function queues a completion wait command into the command |
| 461 | * buffer of an IOMMU |
| 462 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 463 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 464 | { |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 465 | struct iommu_cmd cmd; |
| 466 | volatile u64 sem = 0; |
| 467 | int ret, i = 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 468 | |
| 469 | if (!iommu->need_sync) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 470 | return 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 471 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 472 | build_completion_wait(&cmd, (u64)&sem); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 473 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 474 | ret = iommu_queue_command(iommu, &cmd); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 475 | if (ret) |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 476 | return ret; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 477 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 478 | while (sem == 0 && i < LOOP_TIMEOUT) { |
| 479 | udelay(1); |
| 480 | i += 1; |
| 481 | } |
Joerg Roedel | 84df817 | 2008-12-17 16:36:44 +0100 | [diff] [blame] | 482 | |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 483 | if (i == LOOP_TIMEOUT) { |
| 484 | pr_alert("AMD-Vi: Completion-Wait loop timed out\n"); |
Joerg Roedel | 61985a0 | 2011-04-06 17:46:49 +0200 | [diff] [blame] | 485 | ret = -EIO; |
Joerg Roedel | 815b33f | 2011-04-06 17:26:49 +0200 | [diff] [blame] | 486 | } |
Joerg Roedel | 8eed983 | 2009-11-26 15:45:41 +0100 | [diff] [blame] | 487 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 488 | return 0; |
| 489 | } |
| 490 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 491 | /* |
| 492 | * Command send function for invalidating a device table entry |
| 493 | */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 494 | static int iommu_flush_device(struct device *dev) |
| 495 | { |
| 496 | struct amd_iommu *iommu; |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 497 | struct iommu_cmd cmd; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 498 | u16 devid; |
| 499 | |
| 500 | devid = get_device_id(dev); |
| 501 | iommu = amd_iommu_rlookup_table[devid]; |
| 502 | |
Joerg Roedel | 94fe79e | 2011-04-06 11:07:21 +0200 | [diff] [blame] | 503 | build_inv_dte(&cmd, devid); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 504 | |
| 505 | return iommu_queue_command(iommu, &cmd); |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 506 | } |
| 507 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 508 | /* |
| 509 | * TLB invalidation function which is called from the mapping functions. |
| 510 | * It invalidates a single PTE if the range to flush is within a single |
| 511 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 512 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 513 | static void __domain_flush_pages(struct protection_domain *domain, |
| 514 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 515 | { |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 516 | struct iommu_cmd cmd; |
| 517 | int ret = 0, i; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 518 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 519 | build_inv_iommu_pages(&cmd, address, size, domain->id, pde); |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 520 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 521 | for (i = 0; i < amd_iommus_present; ++i) { |
| 522 | if (!domain->dev_iommu[i]) |
| 523 | continue; |
| 524 | |
| 525 | /* |
| 526 | * Devices of this domain are behind this IOMMU |
| 527 | * We need a TLB flush |
| 528 | */ |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 529 | ret |= iommu_queue_command(amd_iommus[i], &cmd); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 530 | } |
| 531 | |
Joerg Roedel | 11b6402 | 2011-04-06 11:49:28 +0200 | [diff] [blame] | 532 | WARN_ON(ret); |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 533 | } |
| 534 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 535 | static void domain_flush_pages(struct protection_domain *domain, |
| 536 | u64 address, size_t size) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 537 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 538 | __domain_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 539 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 540 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 541 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 542 | static void domain_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 543 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 544 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 545 | } |
| 546 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 547 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 548 | static void domain_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 549 | { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 550 | __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
| 551 | } |
| 552 | |
| 553 | static void domain_flush_complete(struct protection_domain *domain) |
| 554 | { |
| 555 | int i; |
| 556 | |
| 557 | for (i = 0; i < amd_iommus_present; ++i) { |
| 558 | if (!domain->dev_iommu[i]) |
| 559 | continue; |
| 560 | |
| 561 | /* |
| 562 | * Devices of this domain are behind this IOMMU |
| 563 | * We need to wait for completion of all commands. |
| 564 | */ |
| 565 | iommu_completion_wait(amd_iommus[i]); |
| 566 | } |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 567 | } |
| 568 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 569 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 570 | /* |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 571 | * This function flushes the DTEs for all devices in domain |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 572 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 573 | static void domain_flush_devices(struct protection_domain *domain) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 574 | { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 575 | struct iommu_dev_data *dev_data; |
| 576 | unsigned long flags; |
| 577 | |
| 578 | spin_lock_irqsave(&domain->lock, flags); |
| 579 | |
| 580 | list_for_each_entry(dev_data, &domain->dev_list, list) |
| 581 | iommu_flush_device(dev_data->dev); |
| 582 | |
| 583 | spin_unlock_irqrestore(&domain->lock, flags); |
| 584 | } |
| 585 | |
| 586 | static void iommu_flush_all_domain_devices(void) |
| 587 | { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 588 | struct protection_domain *domain; |
| 589 | unsigned long flags; |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 590 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 591 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 592 | |
| 593 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 594 | domain_flush_devices(domain); |
| 595 | domain_flush_complete(domain); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 596 | } |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 597 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 598 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 599 | } |
| 600 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 601 | void amd_iommu_flush_all_devices(void) |
| 602 | { |
| 603 | iommu_flush_all_domain_devices(); |
| 604 | } |
| 605 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 606 | /* |
| 607 | * This function uses heavy locking and may disable irqs for some time. But |
| 608 | * this is no issue because it is only called during resume. |
| 609 | */ |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 610 | void amd_iommu_flush_all_domains(void) |
| 611 | { |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 612 | struct protection_domain *domain; |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 613 | unsigned long flags; |
| 614 | |
| 615 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 616 | |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 617 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 618 | spin_lock(&domain->lock); |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 619 | domain_flush_tlb_pde(domain); |
| 620 | domain_flush_complete(domain); |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 621 | spin_unlock(&domain->lock); |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 622 | } |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 623 | |
| 624 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 625 | } |
| 626 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 627 | /**************************************************************************** |
| 628 | * |
| 629 | * The functions below are used the create the page table mappings for |
| 630 | * unity mapped regions. |
| 631 | * |
| 632 | ****************************************************************************/ |
| 633 | |
| 634 | /* |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 635 | * This function is used to add another level to an IO page table. Adding |
| 636 | * another level increases the size of the address space by 9 bits to a size up |
| 637 | * to 64 bits. |
| 638 | */ |
| 639 | static bool increase_address_space(struct protection_domain *domain, |
| 640 | gfp_t gfp) |
| 641 | { |
| 642 | u64 *pte; |
| 643 | |
| 644 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 645 | /* address space already 64 bit large */ |
| 646 | return false; |
| 647 | |
| 648 | pte = (void *)get_zeroed_page(gfp); |
| 649 | if (!pte) |
| 650 | return false; |
| 651 | |
| 652 | *pte = PM_LEVEL_PDE(domain->mode, |
| 653 | virt_to_phys(domain->pt_root)); |
| 654 | domain->pt_root = pte; |
| 655 | domain->mode += 1; |
| 656 | domain->updated = true; |
| 657 | |
| 658 | return true; |
| 659 | } |
| 660 | |
| 661 | static u64 *alloc_pte(struct protection_domain *domain, |
| 662 | unsigned long address, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 663 | unsigned long page_size, |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 664 | u64 **pte_page, |
| 665 | gfp_t gfp) |
| 666 | { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 667 | int level, end_lvl; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 668 | u64 *pte, *page; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 669 | |
| 670 | BUG_ON(!is_power_of_2(page_size)); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 671 | |
| 672 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 673 | increase_address_space(domain, gfp); |
| 674 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 675 | level = domain->mode - 1; |
| 676 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 677 | address = PAGE_SIZE_ALIGN(address, page_size); |
| 678 | end_lvl = PAGE_SIZE_LEVEL(page_size); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 679 | |
| 680 | while (level > end_lvl) { |
| 681 | if (!IOMMU_PTE_PRESENT(*pte)) { |
| 682 | page = (u64 *)get_zeroed_page(gfp); |
| 683 | if (!page) |
| 684 | return NULL; |
| 685 | *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 686 | } |
| 687 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 688 | /* No level skipping support yet */ |
| 689 | if (PM_PTE_LEVEL(*pte) != level) |
| 690 | return NULL; |
| 691 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 692 | level -= 1; |
| 693 | |
| 694 | pte = IOMMU_PTE_PAGE(*pte); |
| 695 | |
| 696 | if (pte_page && level == end_lvl) |
| 697 | *pte_page = pte; |
| 698 | |
| 699 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 700 | } |
| 701 | |
| 702 | return pte; |
| 703 | } |
| 704 | |
| 705 | /* |
| 706 | * This function checks if there is a PTE for a given dma address. If |
| 707 | * there is one, it returns the pointer to it. |
| 708 | */ |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 709 | static u64 *fetch_pte(struct protection_domain *domain, unsigned long address) |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 710 | { |
| 711 | int level; |
| 712 | u64 *pte; |
| 713 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 714 | if (address > PM_LEVEL_SIZE(domain->mode)) |
| 715 | return NULL; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 716 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 717 | level = domain->mode - 1; |
| 718 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 719 | |
| 720 | while (level > 0) { |
| 721 | |
| 722 | /* Not Present */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 723 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 724 | return NULL; |
| 725 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 726 | /* Large PTE */ |
| 727 | if (PM_PTE_LEVEL(*pte) == 0x07) { |
| 728 | unsigned long pte_mask, __pte; |
| 729 | |
| 730 | /* |
| 731 | * If we have a series of large PTEs, make |
| 732 | * sure to return a pointer to the first one. |
| 733 | */ |
| 734 | pte_mask = PTE_PAGE_SIZE(*pte); |
| 735 | pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1); |
| 736 | __pte = ((unsigned long)pte) & pte_mask; |
| 737 | |
| 738 | return (u64 *)__pte; |
| 739 | } |
| 740 | |
| 741 | /* No level skipping support yet */ |
| 742 | if (PM_PTE_LEVEL(*pte) != level) |
| 743 | return NULL; |
| 744 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 745 | level -= 1; |
| 746 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 747 | /* Walk to the next level */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 748 | pte = IOMMU_PTE_PAGE(*pte); |
| 749 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | return pte; |
| 753 | } |
| 754 | |
| 755 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 756 | * Generic mapping functions. It maps a physical address into a DMA |
| 757 | * address space. It allocates the page table pages if necessary. |
| 758 | * In the future it can be extended to a generic mapping function |
| 759 | * supporting all features of AMD IOMMU page tables like level skipping |
| 760 | * and full 64 bit address spaces. |
| 761 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 762 | static int iommu_map_page(struct protection_domain *dom, |
| 763 | unsigned long bus_addr, |
| 764 | unsigned long phys_addr, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 765 | int prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 766 | unsigned long page_size) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 767 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 768 | u64 __pte, *pte; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 769 | int i, count; |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 770 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 771 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 772 | return -EINVAL; |
| 773 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 774 | bus_addr = PAGE_ALIGN(bus_addr); |
| 775 | phys_addr = PAGE_ALIGN(phys_addr); |
| 776 | count = PAGE_SIZE_PTE_COUNT(page_size); |
| 777 | pte = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 778 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 779 | for (i = 0; i < count; ++i) |
| 780 | if (IOMMU_PTE_PRESENT(pte[i])) |
| 781 | return -EBUSY; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 782 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 783 | if (page_size > PAGE_SIZE) { |
| 784 | __pte = PAGE_SIZE_PTE(phys_addr, page_size); |
| 785 | __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 786 | } else |
| 787 | __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 788 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 789 | if (prot & IOMMU_PROT_IR) |
| 790 | __pte |= IOMMU_PTE_IR; |
| 791 | if (prot & IOMMU_PROT_IW) |
| 792 | __pte |= IOMMU_PTE_IW; |
| 793 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 794 | for (i = 0; i < count; ++i) |
| 795 | pte[i] = __pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 796 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 797 | update_domain(dom); |
| 798 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 799 | return 0; |
| 800 | } |
| 801 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 802 | static unsigned long iommu_unmap_page(struct protection_domain *dom, |
| 803 | unsigned long bus_addr, |
| 804 | unsigned long page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 805 | { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 806 | unsigned long long unmap_size, unmapped; |
| 807 | u64 *pte; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 808 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 809 | BUG_ON(!is_power_of_2(page_size)); |
| 810 | |
| 811 | unmapped = 0; |
| 812 | |
| 813 | while (unmapped < page_size) { |
| 814 | |
| 815 | pte = fetch_pte(dom, bus_addr); |
| 816 | |
| 817 | if (!pte) { |
| 818 | /* |
| 819 | * No PTE for this address |
| 820 | * move forward in 4kb steps |
| 821 | */ |
| 822 | unmap_size = PAGE_SIZE; |
| 823 | } else if (PM_PTE_LEVEL(*pte) == 0) { |
| 824 | /* 4kb PTE found for this address */ |
| 825 | unmap_size = PAGE_SIZE; |
| 826 | *pte = 0ULL; |
| 827 | } else { |
| 828 | int count, i; |
| 829 | |
| 830 | /* Large PTE found which maps this address */ |
| 831 | unmap_size = PTE_PAGE_SIZE(*pte); |
| 832 | count = PAGE_SIZE_PTE_COUNT(unmap_size); |
| 833 | for (i = 0; i < count; i++) |
| 834 | pte[i] = 0ULL; |
| 835 | } |
| 836 | |
| 837 | bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size; |
| 838 | unmapped += unmap_size; |
| 839 | } |
| 840 | |
| 841 | BUG_ON(!is_power_of_2(unmapped)); |
| 842 | |
| 843 | return unmapped; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 844 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 845 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 846 | /* |
| 847 | * This function checks if a specific unity mapping entry is needed for |
| 848 | * this specific IOMMU. |
| 849 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 850 | static int iommu_for_unity_map(struct amd_iommu *iommu, |
| 851 | struct unity_map_entry *entry) |
| 852 | { |
| 853 | u16 bdf, i; |
| 854 | |
| 855 | for (i = entry->devid_start; i <= entry->devid_end; ++i) { |
| 856 | bdf = amd_iommu_alias_table[i]; |
| 857 | if (amd_iommu_rlookup_table[bdf] == iommu) |
| 858 | return 1; |
| 859 | } |
| 860 | |
| 861 | return 0; |
| 862 | } |
| 863 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 864 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 865 | * This function actually applies the mapping to the page table of the |
| 866 | * dma_ops domain. |
| 867 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 868 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 869 | struct unity_map_entry *e) |
| 870 | { |
| 871 | u64 addr; |
| 872 | int ret; |
| 873 | |
| 874 | for (addr = e->address_start; addr < e->address_end; |
| 875 | addr += PAGE_SIZE) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 876 | ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 877 | PAGE_SIZE); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 878 | if (ret) |
| 879 | return ret; |
| 880 | /* |
| 881 | * if unity mapping is in aperture range mark the page |
| 882 | * as allocated in the aperture |
| 883 | */ |
| 884 | if (addr < dma_dom->aperture_size) |
Joerg Roedel | c323956 | 2009-05-12 10:56:44 +0200 | [diff] [blame] | 885 | __set_bit(addr >> PAGE_SHIFT, |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 886 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | return 0; |
| 890 | } |
| 891 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 892 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 893 | * Init the unity mappings for a specific IOMMU in the system |
| 894 | * |
| 895 | * Basically iterates over all unity mapping entries and applies them to |
| 896 | * the default domain DMA of that IOMMU if necessary. |
| 897 | */ |
| 898 | static int iommu_init_unity_mappings(struct amd_iommu *iommu) |
| 899 | { |
| 900 | struct unity_map_entry *entry; |
| 901 | int ret; |
| 902 | |
| 903 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 904 | if (!iommu_for_unity_map(iommu, entry)) |
| 905 | continue; |
| 906 | ret = dma_ops_unity_map(iommu->default_dom, entry); |
| 907 | if (ret) |
| 908 | return ret; |
| 909 | } |
| 910 | |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 915 | * Inits the unity mappings required for a specific device |
| 916 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 917 | static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, |
| 918 | u16 devid) |
| 919 | { |
| 920 | struct unity_map_entry *e; |
| 921 | int ret; |
| 922 | |
| 923 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 924 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 925 | continue; |
| 926 | ret = dma_ops_unity_map(dma_dom, e); |
| 927 | if (ret) |
| 928 | return ret; |
| 929 | } |
| 930 | |
| 931 | return 0; |
| 932 | } |
| 933 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 934 | /**************************************************************************** |
| 935 | * |
| 936 | * The next functions belong to the address allocator for the dma_ops |
| 937 | * interface functions. They work like the allocators in the other IOMMU |
| 938 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 939 | * the aperture. Maybe it could be enhanced in the future to a more |
| 940 | * efficient allocator. |
| 941 | * |
| 942 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 943 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 944 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 945 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 946 | * |
| 947 | * called with domain->lock held |
| 948 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 949 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 950 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 951 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 952 | * ranges. |
| 953 | */ |
| 954 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 955 | unsigned long start_page, |
| 956 | unsigned int pages) |
| 957 | { |
| 958 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
| 959 | |
| 960 | if (start_page + pages > last_page) |
| 961 | pages = last_page - start_page; |
| 962 | |
| 963 | for (i = start_page; i < start_page + pages; ++i) { |
| 964 | int index = i / APERTURE_RANGE_PAGES; |
| 965 | int page = i % APERTURE_RANGE_PAGES; |
| 966 | __set_bit(page, dom->aperture[index]->bitmap); |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 971 | * This function is used to add a new aperture range to an existing |
| 972 | * aperture in case of dma_ops domain allocation or address allocation |
| 973 | * failure. |
| 974 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 975 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 976 | bool populate, gfp_t gfp) |
| 977 | { |
| 978 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 979 | struct amd_iommu *iommu; |
Joerg Roedel | d91afd1 | 2010-01-22 16:40:20 +0100 | [diff] [blame] | 980 | unsigned long i; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 981 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 982 | #ifdef CONFIG_IOMMU_STRESS |
| 983 | populate = false; |
| 984 | #endif |
| 985 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 986 | if (index >= APERTURE_MAX_RANGES) |
| 987 | return -ENOMEM; |
| 988 | |
| 989 | dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp); |
| 990 | if (!dma_dom->aperture[index]) |
| 991 | return -ENOMEM; |
| 992 | |
| 993 | dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp); |
| 994 | if (!dma_dom->aperture[index]->bitmap) |
| 995 | goto out_free; |
| 996 | |
| 997 | dma_dom->aperture[index]->offset = dma_dom->aperture_size; |
| 998 | |
| 999 | if (populate) { |
| 1000 | unsigned long address = dma_dom->aperture_size; |
| 1001 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 1002 | u64 *pte, *pte_page; |
| 1003 | |
| 1004 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1005 | pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1006 | &pte_page, gfp); |
| 1007 | if (!pte) |
| 1008 | goto out_free; |
| 1009 | |
| 1010 | dma_dom->aperture[index]->pte_pages[i] = pte_page; |
| 1011 | |
| 1012 | address += APERTURE_RANGE_SIZE / 64; |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
| 1017 | |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1018 | /* Initialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1019 | for_each_iommu(iommu) { |
| 1020 | if (iommu->exclusion_start && |
| 1021 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 1022 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 1023 | unsigned long startpage; |
| 1024 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 1025 | iommu->exclusion_length, |
| 1026 | PAGE_SIZE); |
| 1027 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 1028 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 1029 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * Check for areas already mapped as present in the new aperture |
| 1034 | * range and mark those pages as reserved in the allocator. Such |
| 1035 | * mappings may already exist as a result of requested unity |
| 1036 | * mappings for devices. |
| 1037 | */ |
| 1038 | for (i = dma_dom->aperture[index]->offset; |
| 1039 | i < dma_dom->aperture_size; |
| 1040 | i += PAGE_SIZE) { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1041 | u64 *pte = fetch_pte(&dma_dom->domain, i); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1042 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 1043 | continue; |
| 1044 | |
| 1045 | dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1); |
| 1046 | } |
| 1047 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1048 | update_domain(&dma_dom->domain); |
| 1049 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1050 | return 0; |
| 1051 | |
| 1052 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1053 | update_domain(&dma_dom->domain); |
| 1054 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1055 | free_page((unsigned long)dma_dom->aperture[index]->bitmap); |
| 1056 | |
| 1057 | kfree(dma_dom->aperture[index]); |
| 1058 | dma_dom->aperture[index] = NULL; |
| 1059 | |
| 1060 | return -ENOMEM; |
| 1061 | } |
| 1062 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1063 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 1064 | struct dma_ops_domain *dom, |
| 1065 | unsigned int pages, |
| 1066 | unsigned long align_mask, |
| 1067 | u64 dma_mask, |
| 1068 | unsigned long start) |
| 1069 | { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1070 | unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1071 | int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 1072 | int i = start >> APERTURE_RANGE_SHIFT; |
| 1073 | unsigned long boundary_size; |
| 1074 | unsigned long address = -1; |
| 1075 | unsigned long limit; |
| 1076 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1077 | next_bit >>= PAGE_SHIFT; |
| 1078 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1079 | boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
| 1080 | PAGE_SIZE) >> PAGE_SHIFT; |
| 1081 | |
| 1082 | for (;i < max_index; ++i) { |
| 1083 | unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; |
| 1084 | |
| 1085 | if (dom->aperture[i]->offset >= dma_mask) |
| 1086 | break; |
| 1087 | |
| 1088 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 1089 | dma_mask >> PAGE_SHIFT); |
| 1090 | |
| 1091 | address = iommu_area_alloc(dom->aperture[i]->bitmap, |
| 1092 | limit, next_bit, pages, 0, |
| 1093 | boundary_size, align_mask); |
| 1094 | if (address != -1) { |
| 1095 | address = dom->aperture[i]->offset + |
| 1096 | (address << PAGE_SHIFT); |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1097 | dom->next_address = address + (pages << PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1098 | break; |
| 1099 | } |
| 1100 | |
| 1101 | next_bit = 0; |
| 1102 | } |
| 1103 | |
| 1104 | return address; |
| 1105 | } |
| 1106 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1107 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 1108 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1109 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1110 | unsigned long align_mask, |
| 1111 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1112 | { |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1113 | unsigned long address; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1114 | |
Joerg Roedel | fe16f08 | 2009-05-22 12:27:53 +0200 | [diff] [blame] | 1115 | #ifdef CONFIG_IOMMU_STRESS |
| 1116 | dom->next_address = 0; |
| 1117 | dom->need_flush = true; |
| 1118 | #endif |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1119 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1120 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1121 | dma_mask, dom->next_address); |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1122 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1123 | if (address == -1) { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1124 | dom->next_address = 0; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1125 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
| 1126 | dma_mask, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1127 | dom->need_flush = true; |
| 1128 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1129 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1130 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1131 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1132 | |
| 1133 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 1134 | |
| 1135 | return address; |
| 1136 | } |
| 1137 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1138 | /* |
| 1139 | * The address free function. |
| 1140 | * |
| 1141 | * called with domain->lock held |
| 1142 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1143 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 1144 | unsigned long address, |
| 1145 | unsigned int pages) |
| 1146 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1147 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 1148 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1149 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1150 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 1151 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 1152 | #ifdef CONFIG_IOMMU_STRESS |
| 1153 | if (i < 4) |
| 1154 | return; |
| 1155 | #endif |
| 1156 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1157 | if (address >= dom->next_address) |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1158 | dom->need_flush = true; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1159 | |
| 1160 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1161 | |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 1162 | bitmap_clear(range->bitmap, address, pages); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1163 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1164 | } |
| 1165 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1166 | /**************************************************************************** |
| 1167 | * |
| 1168 | * The next functions belong to the domain allocation. A domain is |
| 1169 | * allocated for every IOMMU as the default domain. If device isolation |
| 1170 | * is enabled, every device get its own domain. The most important thing |
| 1171 | * about domains is the page table mapping the DMA address space they |
| 1172 | * contain. |
| 1173 | * |
| 1174 | ****************************************************************************/ |
| 1175 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1176 | /* |
| 1177 | * This function adds a protection domain to the global protection domain list |
| 1178 | */ |
| 1179 | static void add_domain_to_list(struct protection_domain *domain) |
| 1180 | { |
| 1181 | unsigned long flags; |
| 1182 | |
| 1183 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1184 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1185 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1186 | } |
| 1187 | |
| 1188 | /* |
| 1189 | * This function removes a protection domain to the global |
| 1190 | * protection domain list |
| 1191 | */ |
| 1192 | static void del_domain_from_list(struct protection_domain *domain) |
| 1193 | { |
| 1194 | unsigned long flags; |
| 1195 | |
| 1196 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1197 | list_del(&domain->list); |
| 1198 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1199 | } |
| 1200 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1201 | static u16 domain_id_alloc(void) |
| 1202 | { |
| 1203 | unsigned long flags; |
| 1204 | int id; |
| 1205 | |
| 1206 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1207 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1208 | BUG_ON(id == 0); |
| 1209 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1210 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1211 | else |
| 1212 | id = 0; |
| 1213 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1214 | |
| 1215 | return id; |
| 1216 | } |
| 1217 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1218 | static void domain_id_free(int id) |
| 1219 | { |
| 1220 | unsigned long flags; |
| 1221 | |
| 1222 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1223 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1224 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1225 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1226 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1227 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1228 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1229 | { |
| 1230 | int i, j; |
| 1231 | u64 *p1, *p2, *p3; |
| 1232 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1233 | p1 = domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1234 | |
| 1235 | if (!p1) |
| 1236 | return; |
| 1237 | |
| 1238 | for (i = 0; i < 512; ++i) { |
| 1239 | if (!IOMMU_PTE_PRESENT(p1[i])) |
| 1240 | continue; |
| 1241 | |
| 1242 | p2 = IOMMU_PTE_PAGE(p1[i]); |
Joerg Roedel | 3cc3d84 | 2008-12-04 16:44:31 +0100 | [diff] [blame] | 1243 | for (j = 0; j < 512; ++j) { |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1244 | if (!IOMMU_PTE_PRESENT(p2[j])) |
| 1245 | continue; |
| 1246 | p3 = IOMMU_PTE_PAGE(p2[j]); |
| 1247 | free_page((unsigned long)p3); |
| 1248 | } |
| 1249 | |
| 1250 | free_page((unsigned long)p2); |
| 1251 | } |
| 1252 | |
| 1253 | free_page((unsigned long)p1); |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1254 | |
| 1255 | domain->pt_root = NULL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1256 | } |
| 1257 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1258 | /* |
| 1259 | * Free a domain, only used if something went wrong in the |
| 1260 | * allocation path and we need to free an already allocated page table |
| 1261 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1262 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1263 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1264 | int i; |
| 1265 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1266 | if (!dom) |
| 1267 | return; |
| 1268 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1269 | del_domain_from_list(&dom->domain); |
| 1270 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1271 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1272 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1273 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1274 | if (!dom->aperture[i]) |
| 1275 | continue; |
| 1276 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 1277 | kfree(dom->aperture[i]); |
| 1278 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1279 | |
| 1280 | kfree(dom); |
| 1281 | } |
| 1282 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1283 | /* |
| 1284 | * Allocates a new protection domain usable for the dma_ops functions. |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1285 | * It also initializes the page table and the address allocator data |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1286 | * structures required for the dma_ops interface |
| 1287 | */ |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1288 | static struct dma_ops_domain *dma_ops_domain_alloc(void) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1289 | { |
| 1290 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1291 | |
| 1292 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 1293 | if (!dma_dom) |
| 1294 | return NULL; |
| 1295 | |
| 1296 | spin_lock_init(&dma_dom->domain.lock); |
| 1297 | |
| 1298 | dma_dom->domain.id = domain_id_alloc(); |
| 1299 | if (dma_dom->domain.id == 0) |
| 1300 | goto free_dma_dom; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1301 | INIT_LIST_HEAD(&dma_dom->domain.dev_list); |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 1302 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1303 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 1304 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1305 | dma_dom->domain.priv = dma_dom; |
| 1306 | if (!dma_dom->domain.pt_root) |
| 1307 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1308 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1309 | dma_dom->need_flush = false; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1310 | dma_dom->target_dev = 0xffff; |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1311 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1312 | add_domain_to_list(&dma_dom->domain); |
| 1313 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1314 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1315 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1316 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1317 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1318 | * mark the first page as allocated so we never return 0 as |
| 1319 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1320 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1321 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1322 | dma_dom->next_address = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1323 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1324 | |
| 1325 | return dma_dom; |
| 1326 | |
| 1327 | free_dma_dom: |
| 1328 | dma_ops_domain_free(dma_dom); |
| 1329 | |
| 1330 | return NULL; |
| 1331 | } |
| 1332 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1333 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1334 | * little helper function to check whether a given protection domain is a |
| 1335 | * dma_ops domain |
| 1336 | */ |
| 1337 | static bool dma_ops_domain(struct protection_domain *domain) |
| 1338 | { |
| 1339 | return domain->flags & PD_DMA_OPS_MASK; |
| 1340 | } |
| 1341 | |
Joerg Roedel | 407d733 | 2009-09-02 16:07:00 +0200 | [diff] [blame] | 1342 | static void set_dte_entry(u16 devid, struct protection_domain *domain) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1343 | { |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1344 | u64 pte_root = virt_to_phys(domain->pt_root); |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 1345 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 1346 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 1347 | << DEV_ENTRY_MODE_SHIFT; |
| 1348 | 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] | 1349 | |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1350 | amd_iommu_dev_table[devid].data[2] = domain->id; |
Joerg Roedel | aa879ff | 2009-08-31 16:01:48 +0200 | [diff] [blame] | 1351 | amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); |
| 1352 | amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1353 | } |
| 1354 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1355 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1356 | { |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1357 | /* remove entry from the device table seen by the hardware */ |
| 1358 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 1359 | amd_iommu_dev_table[devid].data[1] = 0; |
| 1360 | amd_iommu_dev_table[devid].data[2] = 0; |
| 1361 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1362 | amd_iommu_apply_erratum_63(devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1363 | } |
| 1364 | |
| 1365 | static void do_attach(struct device *dev, struct protection_domain *domain) |
| 1366 | { |
| 1367 | struct iommu_dev_data *dev_data; |
| 1368 | struct amd_iommu *iommu; |
| 1369 | u16 devid; |
| 1370 | |
| 1371 | devid = get_device_id(dev); |
| 1372 | iommu = amd_iommu_rlookup_table[devid]; |
| 1373 | dev_data = get_dev_data(dev); |
| 1374 | |
| 1375 | /* Update data structures */ |
| 1376 | dev_data->domain = domain; |
| 1377 | list_add(&dev_data->list, &domain->dev_list); |
| 1378 | set_dte_entry(devid, domain); |
| 1379 | |
| 1380 | /* Do reference counting */ |
| 1381 | domain->dev_iommu[iommu->index] += 1; |
| 1382 | domain->dev_cnt += 1; |
| 1383 | |
| 1384 | /* Flush the DTE entry */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1385 | iommu_flush_device(dev); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1386 | } |
| 1387 | |
| 1388 | static void do_detach(struct device *dev) |
| 1389 | { |
| 1390 | struct iommu_dev_data *dev_data; |
| 1391 | struct amd_iommu *iommu; |
| 1392 | u16 devid; |
| 1393 | |
| 1394 | devid = get_device_id(dev); |
| 1395 | iommu = amd_iommu_rlookup_table[devid]; |
| 1396 | dev_data = get_dev_data(dev); |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1397 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1398 | /* decrease reference counters */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1399 | dev_data->domain->dev_iommu[iommu->index] -= 1; |
| 1400 | dev_data->domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1401 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1402 | /* Update data structures */ |
| 1403 | dev_data->domain = NULL; |
| 1404 | list_del(&dev_data->list); |
| 1405 | clear_dte_entry(devid); |
| 1406 | |
| 1407 | /* Flush the DTE entry */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1408 | iommu_flush_device(dev); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1409 | } |
| 1410 | |
| 1411 | /* |
| 1412 | * If a device is not yet associated with a domain, this function does |
| 1413 | * assigns it visible for the hardware |
| 1414 | */ |
| 1415 | static int __attach_device(struct device *dev, |
| 1416 | struct protection_domain *domain) |
| 1417 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1418 | struct iommu_dev_data *dev_data, *alias_data; |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1419 | int ret; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1420 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1421 | dev_data = get_dev_data(dev); |
| 1422 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1423 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1424 | if (!alias_data) |
| 1425 | return -EINVAL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1426 | |
| 1427 | /* lock domain */ |
| 1428 | spin_lock(&domain->lock); |
| 1429 | |
| 1430 | /* Some sanity checks */ |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1431 | ret = -EBUSY; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1432 | if (alias_data->domain != NULL && |
| 1433 | alias_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1434 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1435 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1436 | if (dev_data->domain != NULL && |
| 1437 | dev_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1438 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1439 | |
| 1440 | /* Do real assignment */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1441 | if (dev_data->alias != dev) { |
| 1442 | alias_data = get_dev_data(dev_data->alias); |
| 1443 | if (alias_data->domain == NULL) |
| 1444 | do_attach(dev_data->alias, domain); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1445 | |
| 1446 | atomic_inc(&alias_data->bind); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1447 | } |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1448 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1449 | if (dev_data->domain == NULL) |
| 1450 | do_attach(dev, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1451 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1452 | atomic_inc(&dev_data->bind); |
| 1453 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1454 | ret = 0; |
| 1455 | |
| 1456 | out_unlock: |
| 1457 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1458 | /* ready */ |
| 1459 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1460 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1461 | return ret; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1462 | } |
| 1463 | |
| 1464 | /* |
| 1465 | * If a device is not yet associated with a domain, this function does |
| 1466 | * assigns it visible for the hardware |
| 1467 | */ |
| 1468 | static int attach_device(struct device *dev, |
| 1469 | struct protection_domain *domain) |
| 1470 | { |
| 1471 | unsigned long flags; |
| 1472 | int ret; |
| 1473 | |
| 1474 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1475 | ret = __attach_device(dev, domain); |
| 1476 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1477 | |
| 1478 | /* |
| 1479 | * We might boot into a crash-kernel here. The crashed kernel |
| 1480 | * left the caches in the IOMMU dirty. So we have to flush |
| 1481 | * here to evict all dirty stuff. |
| 1482 | */ |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1483 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1484 | |
| 1485 | return ret; |
| 1486 | } |
| 1487 | |
| 1488 | /* |
| 1489 | * Removes a device from a protection domain (unlocked) |
| 1490 | */ |
| 1491 | static void __detach_device(struct device *dev) |
| 1492 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1493 | struct iommu_dev_data *dev_data = get_dev_data(dev); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1494 | struct iommu_dev_data *alias_data; |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1495 | struct protection_domain *domain; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1496 | unsigned long flags; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1497 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1498 | BUG_ON(!dev_data->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1499 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1500 | domain = dev_data->domain; |
| 1501 | |
| 1502 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1503 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1504 | if (dev_data->alias != dev) { |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1505 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1506 | if (atomic_dec_and_test(&alias_data->bind)) |
| 1507 | do_detach(dev_data->alias); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1508 | } |
| 1509 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1510 | if (atomic_dec_and_test(&dev_data->bind)) |
| 1511 | do_detach(dev); |
| 1512 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1513 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1514 | |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1515 | /* |
| 1516 | * 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] | 1517 | * passthrough domain if it is detached from any other domain. |
| 1518 | * Make sure we can deassign from the pt_domain itself. |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1519 | */ |
Joerg Roedel | d3ad937 | 2010-01-22 17:55:27 +0100 | [diff] [blame] | 1520 | if (iommu_pass_through && |
| 1521 | (dev_data->domain == NULL && domain != pt_domain)) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1522 | __attach_device(dev, pt_domain); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1523 | } |
| 1524 | |
| 1525 | /* |
| 1526 | * Removes a device from a protection domain (with devtable_lock held) |
| 1527 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1528 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1529 | { |
| 1530 | unsigned long flags; |
| 1531 | |
| 1532 | /* lock device table */ |
| 1533 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1534 | __detach_device(dev); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1535 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1536 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1537 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1538 | /* |
| 1539 | * Find out the protection domain structure for a given PCI device. This |
| 1540 | * will give us the pointer to the page table root for example. |
| 1541 | */ |
| 1542 | static struct protection_domain *domain_for_device(struct device *dev) |
| 1543 | { |
| 1544 | struct protection_domain *dom; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1545 | struct iommu_dev_data *dev_data, *alias_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1546 | unsigned long flags; |
| 1547 | u16 devid, alias; |
| 1548 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1549 | devid = get_device_id(dev); |
| 1550 | alias = amd_iommu_alias_table[devid]; |
| 1551 | dev_data = get_dev_data(dev); |
| 1552 | alias_data = get_dev_data(dev_data->alias); |
| 1553 | if (!alias_data) |
| 1554 | return NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1555 | |
| 1556 | read_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1557 | dom = dev_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1558 | if (dom == NULL && |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1559 | alias_data->domain != NULL) { |
| 1560 | __attach_device(dev, alias_data->domain); |
| 1561 | dom = alias_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1562 | } |
| 1563 | |
| 1564 | read_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1565 | |
| 1566 | return dom; |
| 1567 | } |
| 1568 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1569 | static int device_change_notifier(struct notifier_block *nb, |
| 1570 | unsigned long action, void *data) |
| 1571 | { |
| 1572 | struct device *dev = data; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1573 | u16 devid; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1574 | struct protection_domain *domain; |
| 1575 | struct dma_ops_domain *dma_domain; |
| 1576 | struct amd_iommu *iommu; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1577 | unsigned long flags; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1578 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1579 | if (!check_device(dev)) |
| 1580 | return 0; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1581 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1582 | devid = get_device_id(dev); |
| 1583 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1584 | |
| 1585 | switch (action) { |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 1586 | case BUS_NOTIFY_UNBOUND_DRIVER: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1587 | |
| 1588 | domain = domain_for_device(dev); |
| 1589 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1590 | if (!domain) |
| 1591 | goto out; |
Joerg Roedel | a1ca331 | 2009-09-01 12:22:22 +0200 | [diff] [blame] | 1592 | if (iommu_pass_through) |
| 1593 | break; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1594 | detach_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1595 | break; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1596 | case BUS_NOTIFY_ADD_DEVICE: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1597 | |
| 1598 | iommu_init_device(dev); |
| 1599 | |
| 1600 | domain = domain_for_device(dev); |
| 1601 | |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1602 | /* allocate a protection domain if a device is added */ |
| 1603 | dma_domain = find_protection_domain(devid); |
| 1604 | if (dma_domain) |
| 1605 | goto out; |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1606 | dma_domain = dma_ops_domain_alloc(); |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1607 | if (!dma_domain) |
| 1608 | goto out; |
| 1609 | dma_domain->target_dev = devid; |
| 1610 | |
| 1611 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 1612 | list_add_tail(&dma_domain->list, &iommu_pd_list); |
| 1613 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 1614 | |
| 1615 | break; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1616 | case BUS_NOTIFY_DEL_DEVICE: |
| 1617 | |
| 1618 | iommu_uninit_device(dev); |
| 1619 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1620 | default: |
| 1621 | goto out; |
| 1622 | } |
| 1623 | |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1624 | iommu_flush_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1625 | iommu_completion_wait(iommu); |
| 1626 | |
| 1627 | out: |
| 1628 | return 0; |
| 1629 | } |
| 1630 | |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 1631 | static struct notifier_block device_nb = { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1632 | .notifier_call = device_change_notifier, |
| 1633 | }; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1634 | |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 1635 | void amd_iommu_init_notifier(void) |
| 1636 | { |
| 1637 | bus_register_notifier(&pci_bus_type, &device_nb); |
| 1638 | } |
| 1639 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1640 | /***************************************************************************** |
| 1641 | * |
| 1642 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 1643 | * |
| 1644 | *****************************************************************************/ |
| 1645 | |
| 1646 | /* |
| 1647 | * In the dma_ops path we only have the struct device. This function |
| 1648 | * finds the corresponding IOMMU, the protection domain and the |
| 1649 | * requestor id for a given device. |
| 1650 | * If the device is not yet associated with a domain this is also done |
| 1651 | * in this function. |
| 1652 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1653 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1654 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1655 | struct protection_domain *domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1656 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1657 | u16 devid = get_device_id(dev); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1658 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1659 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1660 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1661 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1662 | domain = domain_for_device(dev); |
| 1663 | if (domain != NULL && !dma_ops_domain(domain)) |
| 1664 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1665 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1666 | if (domain != NULL) |
| 1667 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1668 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1669 | /* Device not bount yet - bind it */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1670 | dma_dom = find_protection_domain(devid); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1671 | if (!dma_dom) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1672 | dma_dom = amd_iommu_rlookup_table[devid]->default_dom; |
| 1673 | attach_device(dev, &dma_dom->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1674 | DUMP_printk("Using protection domain %d for device %s\n", |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1675 | dma_dom->domain.id, dev_name(dev)); |
Joerg Roedel | f91ba19 | 2008-11-25 12:56:12 +0100 | [diff] [blame] | 1676 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1677 | return &dma_dom->domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1678 | } |
| 1679 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1680 | static void update_device_table(struct protection_domain *domain) |
| 1681 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1682 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1683 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1684 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
| 1685 | u16 devid = get_device_id(dev_data->dev); |
| 1686 | set_dte_entry(devid, domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1687 | } |
| 1688 | } |
| 1689 | |
| 1690 | static void update_domain(struct protection_domain *domain) |
| 1691 | { |
| 1692 | if (!domain->updated) |
| 1693 | return; |
| 1694 | |
| 1695 | update_device_table(domain); |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1696 | |
| 1697 | domain_flush_devices(domain); |
| 1698 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1699 | |
| 1700 | domain->updated = false; |
| 1701 | } |
| 1702 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1703 | /* |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1704 | * This function fetches the PTE for a given address in the aperture |
| 1705 | */ |
| 1706 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 1707 | unsigned long address) |
| 1708 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1709 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1710 | u64 *pte, *pte_page; |
| 1711 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1712 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1713 | if (!aperture) |
| 1714 | return NULL; |
| 1715 | |
| 1716 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1717 | if (!pte) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1718 | pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1719 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1720 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 1721 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1722 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1723 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1724 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1725 | |
| 1726 | return pte; |
| 1727 | } |
| 1728 | |
| 1729 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1730 | * This is the generic map function. It maps one 4kb page at paddr to |
| 1731 | * the given address in the DMA address space for the domain. |
| 1732 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1733 | 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] | 1734 | unsigned long address, |
| 1735 | phys_addr_t paddr, |
| 1736 | int direction) |
| 1737 | { |
| 1738 | u64 *pte, __pte; |
| 1739 | |
| 1740 | WARN_ON(address > dom->aperture_size); |
| 1741 | |
| 1742 | paddr &= PAGE_MASK; |
| 1743 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1744 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1745 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1746 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1747 | |
| 1748 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1749 | |
| 1750 | if (direction == DMA_TO_DEVICE) |
| 1751 | __pte |= IOMMU_PTE_IR; |
| 1752 | else if (direction == DMA_FROM_DEVICE) |
| 1753 | __pte |= IOMMU_PTE_IW; |
| 1754 | else if (direction == DMA_BIDIRECTIONAL) |
| 1755 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 1756 | |
| 1757 | WARN_ON(*pte); |
| 1758 | |
| 1759 | *pte = __pte; |
| 1760 | |
| 1761 | return (dma_addr_t)address; |
| 1762 | } |
| 1763 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1764 | /* |
| 1765 | * The generic unmapping function for on page in the DMA address space. |
| 1766 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1767 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1768 | unsigned long address) |
| 1769 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1770 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1771 | u64 *pte; |
| 1772 | |
| 1773 | if (address >= dom->aperture_size) |
| 1774 | return; |
| 1775 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1776 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1777 | if (!aperture) |
| 1778 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1779 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1780 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 1781 | if (!pte) |
| 1782 | return; |
| 1783 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1784 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1785 | |
| 1786 | WARN_ON(!*pte); |
| 1787 | |
| 1788 | *pte = 0ULL; |
| 1789 | } |
| 1790 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1791 | /* |
| 1792 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 1793 | * contiguous memory region into DMA address space. It is used by all |
| 1794 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1795 | * Must be called with the domain lock held. |
| 1796 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1797 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1798 | struct dma_ops_domain *dma_dom, |
| 1799 | phys_addr_t paddr, |
| 1800 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1801 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1802 | bool align, |
| 1803 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1804 | { |
| 1805 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1806 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1807 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1808 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1809 | int i; |
| 1810 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1811 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1812 | paddr &= PAGE_MASK; |
| 1813 | |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 1814 | INC_STATS_COUNTER(total_map_requests); |
| 1815 | |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 1816 | if (pages > 1) |
| 1817 | INC_STATS_COUNTER(cross_page); |
| 1818 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1819 | if (align) |
| 1820 | align_mask = (1UL << get_order(size)) - 1; |
| 1821 | |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1822 | retry: |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1823 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 1824 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1825 | if (unlikely(address == DMA_ERROR_CODE)) { |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1826 | /* |
| 1827 | * setting next_address here will let the address |
| 1828 | * allocator only scan the new allocated range in the |
| 1829 | * first run. This is a small optimization. |
| 1830 | */ |
| 1831 | dma_dom->next_address = dma_dom->aperture_size; |
| 1832 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1833 | if (alloc_new_range(dma_dom, false, GFP_ATOMIC)) |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1834 | goto out; |
| 1835 | |
| 1836 | /* |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 1837 | * aperture was successfully enlarged by 128 MB, try |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1838 | * allocation again |
| 1839 | */ |
| 1840 | goto retry; |
| 1841 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1842 | |
| 1843 | start = address; |
| 1844 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1845 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1846 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1847 | goto out_unmap; |
| 1848 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1849 | paddr += PAGE_SIZE; |
| 1850 | start += PAGE_SIZE; |
| 1851 | } |
| 1852 | address += offset; |
| 1853 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1854 | ADD_STATS_COUNTER(alloced_io_mem, size); |
| 1855 | |
FUJITA Tomonori | afa9fdc | 2008-09-20 01:23:30 +0900 | [diff] [blame] | 1856 | if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1857 | domain_flush_tlb(&dma_dom->domain); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1858 | dma_dom->need_flush = false; |
Joerg Roedel | 318afd4 | 2009-11-23 18:32:38 +0100 | [diff] [blame] | 1859 | } else if (unlikely(amd_iommu_np_cache)) |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1860 | domain_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1861 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1862 | out: |
| 1863 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1864 | |
| 1865 | out_unmap: |
| 1866 | |
| 1867 | for (--i; i >= 0; --i) { |
| 1868 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1869 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1870 | } |
| 1871 | |
| 1872 | dma_ops_free_addresses(dma_dom, address, pages); |
| 1873 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1874 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1875 | } |
| 1876 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1877 | /* |
| 1878 | * Does the reverse of the __map_single function. Must be called with |
| 1879 | * the domain lock held too |
| 1880 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1881 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1882 | dma_addr_t dma_addr, |
| 1883 | size_t size, |
| 1884 | int dir) |
| 1885 | { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1886 | dma_addr_t flush_addr; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1887 | dma_addr_t i, start; |
| 1888 | unsigned int pages; |
| 1889 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1890 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 1891 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1892 | return; |
| 1893 | |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1894 | flush_addr = dma_addr; |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1895 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1896 | dma_addr &= PAGE_MASK; |
| 1897 | start = dma_addr; |
| 1898 | |
| 1899 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1900 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1901 | start += PAGE_SIZE; |
| 1902 | } |
| 1903 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1904 | SUB_STATS_COUNTER(alloced_io_mem, size); |
| 1905 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1906 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1907 | |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1908 | if (amd_iommu_unmap_flush || dma_dom->need_flush) { |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1909 | domain_flush_pages(&dma_dom->domain, flush_addr, size); |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1910 | dma_dom->need_flush = false; |
| 1911 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1912 | } |
| 1913 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1914 | /* |
| 1915 | * The exported map_single function for dma_ops. |
| 1916 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1917 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 1918 | unsigned long offset, size_t size, |
| 1919 | enum dma_data_direction dir, |
| 1920 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1921 | { |
| 1922 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1923 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1924 | dma_addr_t addr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1925 | u64 dma_mask; |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1926 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1927 | |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 1928 | INC_STATS_COUNTER(cnt_map_single); |
| 1929 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1930 | domain = get_domain(dev); |
| 1931 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1932 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1933 | else if (IS_ERR(domain)) |
| 1934 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1935 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1936 | dma_mask = *dev->dma_mask; |
| 1937 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1938 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1939 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1940 | addr = __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1941 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1942 | if (addr == DMA_ERROR_CODE) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1943 | goto out; |
| 1944 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1945 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1946 | |
| 1947 | out: |
| 1948 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1949 | |
| 1950 | return addr; |
| 1951 | } |
| 1952 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1953 | /* |
| 1954 | * The exported unmap_single function for dma_ops. |
| 1955 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1956 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 1957 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1958 | { |
| 1959 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1960 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1961 | |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 1962 | INC_STATS_COUNTER(cnt_unmap_single); |
| 1963 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1964 | domain = get_domain(dev); |
| 1965 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1966 | return; |
| 1967 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1968 | spin_lock_irqsave(&domain->lock, flags); |
| 1969 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1970 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1971 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 1972 | domain_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1973 | |
| 1974 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1975 | } |
| 1976 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1977 | /* |
| 1978 | * This is a special map_sg function which is used if we should map a |
| 1979 | * device which is not handled by an AMD IOMMU in the system. |
| 1980 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1981 | static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, |
| 1982 | int nelems, int dir) |
| 1983 | { |
| 1984 | struct scatterlist *s; |
| 1985 | int i; |
| 1986 | |
| 1987 | for_each_sg(sglist, s, nelems, i) { |
| 1988 | s->dma_address = (dma_addr_t)sg_phys(s); |
| 1989 | s->dma_length = s->length; |
| 1990 | } |
| 1991 | |
| 1992 | return nelems; |
| 1993 | } |
| 1994 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1995 | /* |
| 1996 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 1997 | * lists). |
| 1998 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1999 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2000 | int nelems, enum dma_data_direction dir, |
| 2001 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2002 | { |
| 2003 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2004 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2005 | int i; |
| 2006 | struct scatterlist *s; |
| 2007 | phys_addr_t paddr; |
| 2008 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2009 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2010 | |
Joerg Roedel | d03f067 | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 2011 | INC_STATS_COUNTER(cnt_map_sg); |
| 2012 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2013 | domain = get_domain(dev); |
| 2014 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2015 | return map_sg_no_iommu(dev, sglist, nelems, dir); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2016 | else if (IS_ERR(domain)) |
| 2017 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2018 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2019 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2020 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2021 | spin_lock_irqsave(&domain->lock, flags); |
| 2022 | |
| 2023 | for_each_sg(sglist, s, nelems, i) { |
| 2024 | paddr = sg_phys(s); |
| 2025 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2026 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2027 | paddr, s->length, dir, false, |
| 2028 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2029 | |
| 2030 | if (s->dma_address) { |
| 2031 | s->dma_length = s->length; |
| 2032 | mapped_elems++; |
| 2033 | } else |
| 2034 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2035 | } |
| 2036 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 2037 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2038 | |
| 2039 | out: |
| 2040 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2041 | |
| 2042 | return mapped_elems; |
| 2043 | unmap: |
| 2044 | for_each_sg(sglist, s, mapped_elems, i) { |
| 2045 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2046 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2047 | s->dma_length, dir); |
| 2048 | s->dma_address = s->dma_length = 0; |
| 2049 | } |
| 2050 | |
| 2051 | mapped_elems = 0; |
| 2052 | |
| 2053 | goto out; |
| 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 void unmap_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; |
| 2066 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2067 | int i; |
| 2068 | |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 2069 | INC_STATS_COUNTER(cnt_unmap_sg); |
| 2070 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2071 | domain = get_domain(dev); |
| 2072 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2073 | return; |
| 2074 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2075 | spin_lock_irqsave(&domain->lock, flags); |
| 2076 | |
| 2077 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2078 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2079 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2080 | s->dma_address = s->dma_length = 0; |
| 2081 | } |
| 2082 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 2083 | domain_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2084 | |
| 2085 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2086 | } |
| 2087 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2088 | /* |
| 2089 | * The exported alloc_coherent function for dma_ops. |
| 2090 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2091 | static void *alloc_coherent(struct device *dev, size_t size, |
| 2092 | dma_addr_t *dma_addr, gfp_t flag) |
| 2093 | { |
| 2094 | unsigned long flags; |
| 2095 | void *virt_addr; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2096 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2097 | phys_addr_t paddr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2098 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2099 | |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 2100 | INC_STATS_COUNTER(cnt_alloc_coherent); |
| 2101 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2102 | domain = get_domain(dev); |
| 2103 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2104 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2105 | *dma_addr = __pa(virt_addr); |
| 2106 | return virt_addr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2107 | } else if (IS_ERR(domain)) |
| 2108 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2109 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2110 | dma_mask = dev->coherent_dma_mask; |
| 2111 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 2112 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2113 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2114 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2115 | if (!virt_addr) |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2116 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2117 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2118 | paddr = virt_to_phys(virt_addr); |
| 2119 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2120 | if (!dma_mask) |
| 2121 | dma_mask = *dev->dma_mask; |
| 2122 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2123 | spin_lock_irqsave(&domain->lock, flags); |
| 2124 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2125 | *dma_addr = __map_single(dev, domain->priv, paddr, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2126 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2127 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2128 | if (*dma_addr == DMA_ERROR_CODE) { |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2129 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2130 | goto out_free; |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2131 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2132 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 2133 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2134 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2135 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2136 | |
| 2137 | return virt_addr; |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2138 | |
| 2139 | out_free: |
| 2140 | |
| 2141 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2142 | |
| 2143 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2144 | } |
| 2145 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2146 | /* |
| 2147 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2148 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2149 | static void free_coherent(struct device *dev, size_t size, |
| 2150 | void *virt_addr, dma_addr_t dma_addr) |
| 2151 | { |
| 2152 | unsigned long flags; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2153 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2154 | |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 2155 | INC_STATS_COUNTER(cnt_free_coherent); |
| 2156 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2157 | domain = get_domain(dev); |
| 2158 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2159 | goto free_mem; |
| 2160 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2161 | spin_lock_irqsave(&domain->lock, flags); |
| 2162 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2163 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2164 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 2165 | domain_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2166 | |
| 2167 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2168 | |
| 2169 | free_mem: |
| 2170 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2171 | } |
| 2172 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2173 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2174 | * This function is called by the DMA layer to find out if we can handle a |
| 2175 | * particular device. It is part of the dma_ops. |
| 2176 | */ |
| 2177 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2178 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2179 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2180 | } |
| 2181 | |
| 2182 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2183 | * The function for pre-allocating protection domains. |
| 2184 | * |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2185 | * If the driver core informs the DMA layer if a driver grabs a device |
| 2186 | * we don't need to preallocate the protection domains anymore. |
| 2187 | * For now we have to. |
| 2188 | */ |
Jaswinder Singh Rajput | 0e93dd8 | 2008-12-29 21:45:22 +0530 | [diff] [blame] | 2189 | static void prealloc_protection_domains(void) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2190 | { |
| 2191 | struct pci_dev *dev = NULL; |
| 2192 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2193 | u16 devid; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2194 | |
Chris Wright | d18c69d | 2010-04-02 18:27:55 -0700 | [diff] [blame] | 2195 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2196 | |
| 2197 | /* Do we handle this device? */ |
| 2198 | if (!check_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2199 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2200 | |
| 2201 | /* Is there already any domain for it? */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2202 | if (domain_for_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2203 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2204 | |
| 2205 | devid = get_device_id(&dev->dev); |
| 2206 | |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2207 | dma_dom = dma_ops_domain_alloc(); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2208 | if (!dma_dom) |
| 2209 | continue; |
| 2210 | init_unity_mappings_for_device(dma_dom, devid); |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2211 | dma_dom->target_dev = devid; |
| 2212 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2213 | attach_device(&dev->dev, &dma_dom->domain); |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2214 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2215 | list_add_tail(&dma_dom->list, &iommu_pd_list); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2216 | } |
| 2217 | } |
| 2218 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2219 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2220 | .alloc_coherent = alloc_coherent, |
| 2221 | .free_coherent = free_coherent, |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2222 | .map_page = map_page, |
| 2223 | .unmap_page = unmap_page, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2224 | .map_sg = map_sg, |
| 2225 | .unmap_sg = unmap_sg, |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2226 | .dma_supported = amd_iommu_dma_supported, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2227 | }; |
| 2228 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2229 | /* |
| 2230 | * The function which clues the AMD IOMMU driver into dma_ops. |
| 2231 | */ |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 2232 | |
| 2233 | void __init amd_iommu_init_api(void) |
| 2234 | { |
| 2235 | register_iommu(&amd_iommu_ops); |
| 2236 | } |
| 2237 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2238 | int __init amd_iommu_init_dma_ops(void) |
| 2239 | { |
| 2240 | struct amd_iommu *iommu; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2241 | int ret; |
| 2242 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2243 | /* |
| 2244 | * first allocate a default protection domain for every IOMMU we |
| 2245 | * found in the system. Devices not assigned to any other |
| 2246 | * protection domain will be assigned to the default one. |
| 2247 | */ |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2248 | for_each_iommu(iommu) { |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2249 | iommu->default_dom = dma_ops_domain_alloc(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2250 | if (iommu->default_dom == NULL) |
| 2251 | return -ENOMEM; |
Joerg Roedel | e2dc14a | 2008-12-10 18:48:59 +0100 | [diff] [blame] | 2252 | iommu->default_dom->domain.flags |= PD_DEFAULT_MASK; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2253 | ret = iommu_init_unity_mappings(iommu); |
| 2254 | if (ret) |
| 2255 | goto free_domains; |
| 2256 | } |
| 2257 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2258 | /* |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2259 | * Pre-allocate the protection domains for each device. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2260 | */ |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2261 | prealloc_protection_domains(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2262 | |
| 2263 | iommu_detected = 1; |
FUJITA Tomonori | 75f1cdf | 2009-11-10 19:46:20 +0900 | [diff] [blame] | 2264 | swiotlb = 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2265 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2266 | /* Make the driver finally visible to the drivers */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2267 | dma_ops = &amd_iommu_dma_ops; |
| 2268 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 2269 | amd_iommu_stats_init(); |
| 2270 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2271 | return 0; |
| 2272 | |
| 2273 | free_domains: |
| 2274 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2275 | for_each_iommu(iommu) { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2276 | if (iommu->default_dom) |
| 2277 | dma_ops_domain_free(iommu->default_dom); |
| 2278 | } |
| 2279 | |
| 2280 | return ret; |
| 2281 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2282 | |
| 2283 | /***************************************************************************** |
| 2284 | * |
| 2285 | * The following functions belong to the exported interface of AMD IOMMU |
| 2286 | * |
| 2287 | * This interface allows access to lower level functions of the IOMMU |
| 2288 | * like protection domain handling and assignement of devices to domains |
| 2289 | * which is not possible with the dma_ops interface. |
| 2290 | * |
| 2291 | *****************************************************************************/ |
| 2292 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2293 | static void cleanup_domain(struct protection_domain *domain) |
| 2294 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2295 | struct iommu_dev_data *dev_data, *next; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2296 | unsigned long flags; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2297 | |
| 2298 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2299 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2300 | list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) { |
| 2301 | struct device *dev = dev_data->dev; |
| 2302 | |
Chris Wright | 04e856c | 2010-02-17 08:51:20 -0800 | [diff] [blame] | 2303 | __detach_device(dev); |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2304 | atomic_set(&dev_data->bind, 0); |
| 2305 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2306 | |
| 2307 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2308 | } |
| 2309 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2310 | static void protection_domain_free(struct protection_domain *domain) |
| 2311 | { |
| 2312 | if (!domain) |
| 2313 | return; |
| 2314 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2315 | del_domain_from_list(domain); |
| 2316 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2317 | if (domain->id) |
| 2318 | domain_id_free(domain->id); |
| 2319 | |
| 2320 | kfree(domain); |
| 2321 | } |
| 2322 | |
| 2323 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2324 | { |
| 2325 | struct protection_domain *domain; |
| 2326 | |
| 2327 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 2328 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2329 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2330 | |
| 2331 | spin_lock_init(&domain->lock); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2332 | mutex_init(&domain->api_lock); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2333 | domain->id = domain_id_alloc(); |
| 2334 | if (!domain->id) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2335 | goto out_err; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 2336 | INIT_LIST_HEAD(&domain->dev_list); |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2337 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2338 | add_domain_to_list(domain); |
| 2339 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2340 | return domain; |
| 2341 | |
| 2342 | out_err: |
| 2343 | kfree(domain); |
| 2344 | |
| 2345 | return NULL; |
| 2346 | } |
| 2347 | |
| 2348 | static int amd_iommu_domain_init(struct iommu_domain *dom) |
| 2349 | { |
| 2350 | struct protection_domain *domain; |
| 2351 | |
| 2352 | domain = protection_domain_alloc(); |
| 2353 | if (!domain) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2354 | goto out_free; |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2355 | |
| 2356 | domain->mode = PAGE_MODE_3_LEVEL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2357 | domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 2358 | if (!domain->pt_root) |
| 2359 | goto out_free; |
| 2360 | |
| 2361 | dom->priv = domain; |
| 2362 | |
| 2363 | return 0; |
| 2364 | |
| 2365 | out_free: |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2366 | protection_domain_free(domain); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2367 | |
| 2368 | return -ENOMEM; |
| 2369 | } |
| 2370 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2371 | static void amd_iommu_domain_destroy(struct iommu_domain *dom) |
| 2372 | { |
| 2373 | struct protection_domain *domain = dom->priv; |
| 2374 | |
| 2375 | if (!domain) |
| 2376 | return; |
| 2377 | |
| 2378 | if (domain->dev_cnt > 0) |
| 2379 | cleanup_domain(domain); |
| 2380 | |
| 2381 | BUG_ON(domain->dev_cnt != 0); |
| 2382 | |
| 2383 | free_pagetable(domain); |
| 2384 | |
Joerg Roedel | 8b408fe | 2010-03-08 14:20:07 +0100 | [diff] [blame] | 2385 | protection_domain_free(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2386 | |
| 2387 | dom->priv = NULL; |
| 2388 | } |
| 2389 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2390 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 2391 | struct device *dev) |
| 2392 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2393 | struct iommu_dev_data *dev_data = dev->archdata.iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2394 | struct amd_iommu *iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2395 | u16 devid; |
| 2396 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2397 | if (!check_device(dev)) |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2398 | return; |
| 2399 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2400 | devid = get_device_id(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2401 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2402 | if (dev_data->domain != NULL) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2403 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2404 | |
| 2405 | iommu = amd_iommu_rlookup_table[devid]; |
| 2406 | if (!iommu) |
| 2407 | return; |
| 2408 | |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 2409 | iommu_flush_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2410 | iommu_completion_wait(iommu); |
| 2411 | } |
| 2412 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2413 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 2414 | struct device *dev) |
| 2415 | { |
| 2416 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2417 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2418 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2419 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2420 | u16 devid; |
| 2421 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2422 | if (!check_device(dev)) |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2423 | return -EINVAL; |
| 2424 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2425 | dev_data = dev->archdata.iommu; |
| 2426 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2427 | devid = get_device_id(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2428 | |
| 2429 | iommu = amd_iommu_rlookup_table[devid]; |
| 2430 | if (!iommu) |
| 2431 | return -EINVAL; |
| 2432 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2433 | if (dev_data->domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2434 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2435 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2436 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2437 | |
| 2438 | iommu_completion_wait(iommu); |
| 2439 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2440 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2441 | } |
| 2442 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2443 | static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova, |
| 2444 | phys_addr_t paddr, int gfp_order, int iommu_prot) |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2445 | { |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2446 | unsigned long page_size = 0x1000UL << gfp_order; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2447 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2448 | int prot = 0; |
| 2449 | int ret; |
| 2450 | |
| 2451 | if (iommu_prot & IOMMU_READ) |
| 2452 | prot |= IOMMU_PROT_IR; |
| 2453 | if (iommu_prot & IOMMU_WRITE) |
| 2454 | prot |= IOMMU_PROT_IW; |
| 2455 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2456 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2457 | ret = iommu_map_page(domain, iova, paddr, prot, page_size); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2458 | mutex_unlock(&domain->api_lock); |
| 2459 | |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2460 | return ret; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2461 | } |
| 2462 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2463 | static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, |
| 2464 | int gfp_order) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2465 | { |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2466 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2467 | unsigned long page_size, unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2468 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2469 | page_size = 0x1000UL << gfp_order; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2470 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2471 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2472 | unmap_size = iommu_unmap_page(domain, iova, page_size); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2473 | mutex_unlock(&domain->api_lock); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2474 | |
Joerg Roedel | 17b124b | 2011-04-06 18:01:35 +0200 | [diff] [blame^] | 2475 | domain_flush_tlb_pde(domain); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2476 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2477 | return get_order(unmap_size); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2478 | } |
| 2479 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2480 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
| 2481 | unsigned long iova) |
| 2482 | { |
| 2483 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2484 | unsigned long offset_mask; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2485 | phys_addr_t paddr; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2486 | u64 *pte, __pte; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2487 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 2488 | pte = fetch_pte(domain, iova); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2489 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 2490 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2491 | return 0; |
| 2492 | |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2493 | if (PM_PTE_LEVEL(*pte) == 0) |
| 2494 | offset_mask = PAGE_SIZE - 1; |
| 2495 | else |
| 2496 | offset_mask = PTE_PAGE_SIZE(*pte) - 1; |
| 2497 | |
| 2498 | __pte = *pte & PM_ADDR_MASK; |
| 2499 | paddr = (__pte & ~offset_mask) | (iova & offset_mask); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2500 | |
| 2501 | return paddr; |
| 2502 | } |
| 2503 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2504 | static int amd_iommu_domain_has_cap(struct iommu_domain *domain, |
| 2505 | unsigned long cap) |
| 2506 | { |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 2507 | switch (cap) { |
| 2508 | case IOMMU_CAP_CACHE_COHERENCY: |
| 2509 | return 1; |
| 2510 | } |
| 2511 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2512 | return 0; |
| 2513 | } |
| 2514 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2515 | static struct iommu_ops amd_iommu_ops = { |
| 2516 | .domain_init = amd_iommu_domain_init, |
| 2517 | .domain_destroy = amd_iommu_domain_destroy, |
| 2518 | .attach_dev = amd_iommu_attach_device, |
| 2519 | .detach_dev = amd_iommu_detach_device, |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2520 | .map = amd_iommu_map, |
| 2521 | .unmap = amd_iommu_unmap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2522 | .iova_to_phys = amd_iommu_iova_to_phys, |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2523 | .domain_has_cap = amd_iommu_domain_has_cap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2524 | }; |
| 2525 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2526 | /***************************************************************************** |
| 2527 | * |
| 2528 | * The next functions do a basic initialization of IOMMU for pass through |
| 2529 | * mode |
| 2530 | * |
| 2531 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 2532 | * DMA-API translation. |
| 2533 | * |
| 2534 | *****************************************************************************/ |
| 2535 | |
| 2536 | int __init amd_iommu_init_passthrough(void) |
| 2537 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2538 | struct amd_iommu *iommu; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2539 | struct pci_dev *dev = NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2540 | u16 devid; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2541 | |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 2542 | /* allocate passthrough domain */ |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2543 | pt_domain = protection_domain_alloc(); |
| 2544 | if (!pt_domain) |
| 2545 | return -ENOMEM; |
| 2546 | |
| 2547 | pt_domain->mode |= PAGE_MODE_NONE; |
| 2548 | |
Kulikov Vasiliy | 6c54aab | 2010-07-03 12:03:51 -0400 | [diff] [blame] | 2549 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2550 | if (!check_device(&dev->dev)) |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2551 | continue; |
| 2552 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2553 | devid = get_device_id(&dev->dev); |
| 2554 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2555 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2556 | if (!iommu) |
| 2557 | continue; |
| 2558 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2559 | attach_device(&dev->dev, pt_domain); |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2560 | } |
| 2561 | |
| 2562 | pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); |
| 2563 | |
| 2564 | return 0; |
| 2565 | } |