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 | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 28 | #include <asm/proto.h> |
FUJITA Tomonori | 46a7fa2 | 2008-07-11 10:23:42 +0900 | [diff] [blame] | 29 | #include <asm/iommu.h> |
Joerg Roedel | 1d9b16d | 2008-11-27 18:39:15 +0100 | [diff] [blame] | 30 | #include <asm/gart.h> |
Joerg Roedel | 6a9401a | 2009-11-20 13:22:21 +0100 | [diff] [blame] | 31 | #include <asm/amd_iommu_proto.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 32 | #include <asm/amd_iommu_types.h> |
Joerg Roedel | c6da992 | 2008-06-26 21:28:06 +0200 | [diff] [blame] | 33 | #include <asm/amd_iommu.h> |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 34 | |
| 35 | #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) |
| 36 | |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 37 | #define EXIT_LOOP_COUNT 10000000 |
| 38 | |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 39 | static DEFINE_RWLOCK(amd_iommu_devtable_lock); |
| 40 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 41 | /* A list of preallocated protection domains */ |
| 42 | static LIST_HEAD(iommu_pd_list); |
| 43 | static DEFINE_SPINLOCK(iommu_pd_list_lock); |
| 44 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 45 | /* |
| 46 | * Domain for untranslated devices - only allocated |
| 47 | * if iommu=pt passed on kernel cmd line. |
| 48 | */ |
| 49 | static struct protection_domain *pt_domain; |
| 50 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 51 | static struct iommu_ops amd_iommu_ops; |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 52 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 53 | /* |
| 54 | * general struct to manage commands send to an IOMMU |
| 55 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 56 | struct iommu_cmd { |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 57 | u32 data[4]; |
| 58 | }; |
| 59 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 60 | static void reset_iommu_command_buffer(struct amd_iommu *iommu); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 61 | static void update_domain(struct protection_domain *domain); |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 62 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 63 | /**************************************************************************** |
| 64 | * |
| 65 | * Helper functions |
| 66 | * |
| 67 | ****************************************************************************/ |
| 68 | |
| 69 | static inline u16 get_device_id(struct device *dev) |
| 70 | { |
| 71 | struct pci_dev *pdev = to_pci_dev(dev); |
| 72 | |
| 73 | return calc_devid(pdev->bus->number, pdev->devfn); |
| 74 | } |
| 75 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 76 | static struct iommu_dev_data *get_dev_data(struct device *dev) |
| 77 | { |
| 78 | return dev->archdata.iommu; |
| 79 | } |
| 80 | |
Joerg Roedel | 71c7098 | 2009-11-24 16:43:06 +0100 | [diff] [blame] | 81 | /* |
| 82 | * In this function the list of preallocated protection domains is traversed to |
| 83 | * find the domain for a specific device |
| 84 | */ |
| 85 | static struct dma_ops_domain *find_protection_domain(u16 devid) |
| 86 | { |
| 87 | struct dma_ops_domain *entry, *ret = NULL; |
| 88 | unsigned long flags; |
| 89 | u16 alias = amd_iommu_alias_table[devid]; |
| 90 | |
| 91 | if (list_empty(&iommu_pd_list)) |
| 92 | return NULL; |
| 93 | |
| 94 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 95 | |
| 96 | list_for_each_entry(entry, &iommu_pd_list, list) { |
| 97 | if (entry->target_dev == devid || |
| 98 | entry->target_dev == alias) { |
| 99 | ret = entry; |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 109 | /* |
| 110 | * This function checks if the driver got a valid device from the caller to |
| 111 | * avoid dereferencing invalid pointers. |
| 112 | */ |
| 113 | static bool check_device(struct device *dev) |
| 114 | { |
| 115 | u16 devid; |
| 116 | |
| 117 | if (!dev || !dev->dma_mask) |
| 118 | return false; |
| 119 | |
| 120 | /* No device or no PCI device */ |
Julia Lawall | 339d326 | 2010-02-06 09:42:39 +0100 | [diff] [blame] | 121 | if (dev->bus != &pci_bus_type) |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 122 | return false; |
| 123 | |
| 124 | devid = get_device_id(dev); |
| 125 | |
| 126 | /* Out of our scope? */ |
| 127 | if (devid > amd_iommu_last_bdf) |
| 128 | return false; |
| 129 | |
| 130 | if (amd_iommu_rlookup_table[devid] == NULL) |
| 131 | return false; |
| 132 | |
| 133 | return true; |
| 134 | } |
| 135 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 136 | static int iommu_init_device(struct device *dev) |
| 137 | { |
| 138 | struct iommu_dev_data *dev_data; |
| 139 | struct pci_dev *pdev; |
| 140 | u16 devid, alias; |
| 141 | |
| 142 | if (dev->archdata.iommu) |
| 143 | return 0; |
| 144 | |
| 145 | dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL); |
| 146 | if (!dev_data) |
| 147 | return -ENOMEM; |
| 148 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 149 | dev_data->dev = dev; |
| 150 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 151 | devid = get_device_id(dev); |
| 152 | alias = amd_iommu_alias_table[devid]; |
| 153 | pdev = pci_get_bus_and_slot(PCI_BUS(alias), alias & 0xff); |
| 154 | if (pdev) |
| 155 | dev_data->alias = &pdev->dev; |
| 156 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 157 | atomic_set(&dev_data->bind, 0); |
| 158 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 159 | dev->archdata.iommu = dev_data; |
| 160 | |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | static void iommu_uninit_device(struct device *dev) |
| 166 | { |
| 167 | kfree(dev->archdata.iommu); |
| 168 | } |
Joerg Roedel | b7cc955 | 2009-12-10 11:03:39 +0100 | [diff] [blame] | 169 | |
| 170 | void __init amd_iommu_uninit_devices(void) |
| 171 | { |
| 172 | struct pci_dev *pdev = NULL; |
| 173 | |
| 174 | for_each_pci_dev(pdev) { |
| 175 | |
| 176 | if (!check_device(&pdev->dev)) |
| 177 | continue; |
| 178 | |
| 179 | iommu_uninit_device(&pdev->dev); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | int __init amd_iommu_init_devices(void) |
| 184 | { |
| 185 | struct pci_dev *pdev = NULL; |
| 186 | int ret = 0; |
| 187 | |
| 188 | for_each_pci_dev(pdev) { |
| 189 | |
| 190 | if (!check_device(&pdev->dev)) |
| 191 | continue; |
| 192 | |
| 193 | ret = iommu_init_device(&pdev->dev); |
| 194 | if (ret) |
| 195 | goto out_free; |
| 196 | } |
| 197 | |
| 198 | return 0; |
| 199 | |
| 200 | out_free: |
| 201 | |
| 202 | amd_iommu_uninit_devices(); |
| 203 | |
| 204 | return ret; |
| 205 | } |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 206 | #ifdef CONFIG_AMD_IOMMU_STATS |
| 207 | |
| 208 | /* |
| 209 | * Initialization code for statistics collection |
| 210 | */ |
| 211 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 212 | DECLARE_STATS_COUNTER(compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 213 | DECLARE_STATS_COUNTER(cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 214 | DECLARE_STATS_COUNTER(cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 215 | DECLARE_STATS_COUNTER(cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 216 | DECLARE_STATS_COUNTER(cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 217 | DECLARE_STATS_COUNTER(cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 218 | DECLARE_STATS_COUNTER(cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 219 | DECLARE_STATS_COUNTER(cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 220 | DECLARE_STATS_COUNTER(domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 221 | DECLARE_STATS_COUNTER(domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 222 | DECLARE_STATS_COUNTER(alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 223 | DECLARE_STATS_COUNTER(total_map_requests); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 224 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 225 | static struct dentry *stats_dir; |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 226 | static struct dentry *de_fflush; |
| 227 | |
| 228 | static void amd_iommu_stats_add(struct __iommu_counter *cnt) |
| 229 | { |
| 230 | if (stats_dir == NULL) |
| 231 | return; |
| 232 | |
| 233 | cnt->dent = debugfs_create_u64(cnt->name, 0444, stats_dir, |
| 234 | &cnt->value); |
| 235 | } |
| 236 | |
| 237 | static void amd_iommu_stats_init(void) |
| 238 | { |
| 239 | stats_dir = debugfs_create_dir("amd-iommu", NULL); |
| 240 | if (stats_dir == NULL) |
| 241 | return; |
| 242 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 243 | de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir, |
| 244 | (u32 *)&amd_iommu_unmap_flush); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 245 | |
| 246 | amd_iommu_stats_add(&compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 247 | amd_iommu_stats_add(&cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 248 | amd_iommu_stats_add(&cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 249 | amd_iommu_stats_add(&cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 250 | amd_iommu_stats_add(&cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 251 | amd_iommu_stats_add(&cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 252 | amd_iommu_stats_add(&cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 253 | amd_iommu_stats_add(&cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 254 | amd_iommu_stats_add(&domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 255 | amd_iommu_stats_add(&domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 256 | amd_iommu_stats_add(&alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 257 | amd_iommu_stats_add(&total_map_requests); |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | #endif |
| 261 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 262 | /**************************************************************************** |
| 263 | * |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 264 | * Interrupt handling functions |
| 265 | * |
| 266 | ****************************************************************************/ |
| 267 | |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 268 | static void dump_dte_entry(u16 devid) |
| 269 | { |
| 270 | int i; |
| 271 | |
| 272 | for (i = 0; i < 8; ++i) |
| 273 | pr_err("AMD-Vi: DTE[%d]: %08x\n", i, |
| 274 | amd_iommu_dev_table[devid].data[i]); |
| 275 | } |
| 276 | |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 277 | static void dump_command(unsigned long phys_addr) |
| 278 | { |
| 279 | struct iommu_cmd *cmd = phys_to_virt(phys_addr); |
| 280 | int i; |
| 281 | |
| 282 | for (i = 0; i < 4; ++i) |
| 283 | pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); |
| 284 | } |
| 285 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 286 | static void iommu_print_event(struct amd_iommu *iommu, void *__evt) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 287 | { |
| 288 | u32 *event = __evt; |
| 289 | int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; |
| 290 | int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; |
| 291 | int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; |
| 292 | int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; |
| 293 | u64 address = (u64)(((u64)event[3]) << 32) | event[2]; |
| 294 | |
Joerg Roedel | 4c6f40d | 2009-09-01 16:43:58 +0200 | [diff] [blame] | 295 | printk(KERN_ERR "AMD-Vi: Event logged ["); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 296 | |
| 297 | switch (type) { |
| 298 | case EVENT_TYPE_ILL_DEV: |
| 299 | printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " |
| 300 | "address=0x%016llx flags=0x%04x]\n", |
| 301 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 302 | address, flags); |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 303 | dump_dte_entry(devid); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 304 | break; |
| 305 | case EVENT_TYPE_IO_FAULT: |
| 306 | printk("IO_PAGE_FAULT device=%02x:%02x.%x " |
| 307 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 308 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 309 | domid, address, flags); |
| 310 | break; |
| 311 | case EVENT_TYPE_DEV_TAB_ERR: |
| 312 | printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 313 | "address=0x%016llx flags=0x%04x]\n", |
| 314 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 315 | address, flags); |
| 316 | break; |
| 317 | case EVENT_TYPE_PAGE_TAB_ERR: |
| 318 | printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 319 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 320 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 321 | domid, address, flags); |
| 322 | break; |
| 323 | case EVENT_TYPE_ILL_CMD: |
| 324 | printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); |
Joerg Roedel | 8eed983 | 2009-11-26 15:45:41 +0100 | [diff] [blame] | 325 | iommu->reset_in_progress = true; |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 326 | reset_iommu_command_buffer(iommu); |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 327 | dump_command(address); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 328 | break; |
| 329 | case EVENT_TYPE_CMD_HARD_ERR: |
| 330 | printk("COMMAND_HARDWARE_ERROR address=0x%016llx " |
| 331 | "flags=0x%04x]\n", address, flags); |
| 332 | break; |
| 333 | case EVENT_TYPE_IOTLB_INV_TO: |
| 334 | printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " |
| 335 | "address=0x%016llx]\n", |
| 336 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 337 | address); |
| 338 | break; |
| 339 | case EVENT_TYPE_INV_DEV_REQ: |
| 340 | printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " |
| 341 | "address=0x%016llx flags=0x%04x]\n", |
| 342 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 343 | address, flags); |
| 344 | break; |
| 345 | default: |
| 346 | printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | static void iommu_poll_events(struct amd_iommu *iommu) |
| 351 | { |
| 352 | u32 head, tail; |
| 353 | unsigned long flags; |
| 354 | |
| 355 | spin_lock_irqsave(&iommu->lock, flags); |
| 356 | |
| 357 | head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 358 | tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); |
| 359 | |
| 360 | while (head != tail) { |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 361 | iommu_print_event(iommu, iommu->evt_buf + head); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 362 | head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; |
| 363 | } |
| 364 | |
| 365 | writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 366 | |
| 367 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 368 | } |
| 369 | |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 370 | irqreturn_t amd_iommu_int_handler(int irq, void *data) |
| 371 | { |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 372 | struct amd_iommu *iommu; |
| 373 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 374 | for_each_iommu(iommu) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 375 | iommu_poll_events(iommu); |
| 376 | |
| 377 | return IRQ_HANDLED; |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | /**************************************************************************** |
| 381 | * |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 382 | * IOMMU command queuing functions |
| 383 | * |
| 384 | ****************************************************************************/ |
| 385 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame^] | 386 | static void build_completion_wait(struct iommu_cmd *cmd) |
| 387 | { |
| 388 | memset(cmd, 0, sizeof(*cmd)); |
| 389 | cmd->data[0] = CMD_COMPL_WAIT_INT_MASK; |
| 390 | CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); |
| 391 | } |
| 392 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 393 | /* |
| 394 | * Writes the command to the IOMMUs command buffer and informs the |
| 395 | * hardware about the new command. Must be called with iommu->lock held. |
| 396 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 397 | 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] | 398 | { |
| 399 | u32 tail, head; |
| 400 | u8 *target; |
| 401 | |
Chris Wright | 549c90dc | 2010-04-02 18:27:53 -0700 | [diff] [blame] | 402 | WARN_ON(iommu->cmd_buf_size & CMD_BUFFER_UNINITIALIZED); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 403 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
Jiri Kosina | 8a7c5ef | 2008-08-19 02:13:55 +0200 | [diff] [blame] | 404 | target = iommu->cmd_buf + tail; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 405 | memcpy_toio(target, cmd, sizeof(*cmd)); |
| 406 | tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 407 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 408 | if (tail == head) |
| 409 | return -ENOMEM; |
| 410 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 415 | /* |
| 416 | * General queuing function for commands. Takes iommu->lock and calls |
| 417 | * __iommu_queue_command(). |
| 418 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 419 | 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] | 420 | { |
| 421 | unsigned long flags; |
| 422 | int ret; |
| 423 | |
| 424 | spin_lock_irqsave(&iommu->lock, flags); |
| 425 | ret = __iommu_queue_command(iommu, cmd); |
Joerg Roedel | 09ee17e | 2008-12-03 12:19:27 +0100 | [diff] [blame] | 426 | if (!ret) |
Joerg Roedel | 0cfd7aa | 2008-12-10 19:58:00 +0100 | [diff] [blame] | 427 | iommu->need_sync = true; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 428 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 429 | |
| 430 | return ret; |
| 431 | } |
| 432 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 433 | /* |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 434 | * This function waits until an IOMMU has completed a completion |
| 435 | * wait command |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 436 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 437 | static void __iommu_wait_for_completion(struct amd_iommu *iommu) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 438 | { |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 439 | int ready = 0; |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 440 | unsigned status = 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 441 | unsigned long i = 0; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 442 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 443 | INC_STATS_COUNTER(compl_wait); |
| 444 | |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 445 | while (!ready && (i < EXIT_LOOP_COUNT)) { |
| 446 | ++i; |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 447 | /* wait for the bit to become one */ |
| 448 | status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 449 | ready = status & MMIO_STATUS_COM_WAIT_INT_MASK; |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 450 | } |
| 451 | |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 452 | /* set bit back to zero */ |
| 453 | status &= ~MMIO_STATUS_COM_WAIT_INT_MASK; |
| 454 | writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 455 | |
Joerg Roedel | 8eed983 | 2009-11-26 15:45:41 +0100 | [diff] [blame] | 456 | if (unlikely(i == EXIT_LOOP_COUNT)) |
| 457 | iommu->reset_in_progress = true; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* |
| 461 | * This function queues a completion wait command into the command |
| 462 | * buffer of an IOMMU |
| 463 | */ |
| 464 | static int __iommu_completion_wait(struct amd_iommu *iommu) |
| 465 | { |
| 466 | struct iommu_cmd cmd; |
| 467 | |
Joerg Roedel | ded4673 | 2011-04-06 10:53:48 +0200 | [diff] [blame^] | 468 | build_completion_wait(&cmd); |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 469 | |
| 470 | return __iommu_queue_command(iommu, &cmd); |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * This function is called whenever we need to ensure that the IOMMU has |
| 475 | * completed execution of all commands we sent. It sends a |
| 476 | * COMPLETION_WAIT command and waits for it to finish. The IOMMU informs |
| 477 | * us about that by writing a value to a physical address we pass with |
| 478 | * the command. |
| 479 | */ |
| 480 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 481 | { |
| 482 | int ret = 0; |
| 483 | unsigned long flags; |
| 484 | |
| 485 | spin_lock_irqsave(&iommu->lock, flags); |
| 486 | |
| 487 | if (!iommu->need_sync) |
| 488 | goto out; |
| 489 | |
| 490 | ret = __iommu_completion_wait(iommu); |
| 491 | |
Joerg Roedel | 0cfd7aa | 2008-12-10 19:58:00 +0100 | [diff] [blame] | 492 | iommu->need_sync = false; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 493 | |
| 494 | if (ret) |
| 495 | goto out; |
| 496 | |
| 497 | __iommu_wait_for_completion(iommu); |
Joerg Roedel | 84df817 | 2008-12-17 16:36:44 +0100 | [diff] [blame] | 498 | |
Joerg Roedel | 7e4f88d | 2008-09-17 14:19:15 +0200 | [diff] [blame] | 499 | out: |
| 500 | spin_unlock_irqrestore(&iommu->lock, flags); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 501 | |
Joerg Roedel | 8eed983 | 2009-11-26 15:45:41 +0100 | [diff] [blame] | 502 | if (iommu->reset_in_progress) |
| 503 | reset_iommu_command_buffer(iommu); |
| 504 | |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 505 | return 0; |
| 506 | } |
| 507 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 508 | static void iommu_flush_complete(struct protection_domain *domain) |
| 509 | { |
| 510 | int i; |
| 511 | |
| 512 | for (i = 0; i < amd_iommus_present; ++i) { |
| 513 | if (!domain->dev_iommu[i]) |
| 514 | continue; |
| 515 | |
| 516 | /* |
| 517 | * Devices of this domain are behind this IOMMU |
| 518 | * We need to wait for completion of all commands. |
| 519 | */ |
| 520 | iommu_completion_wait(amd_iommus[i]); |
| 521 | } |
| 522 | } |
| 523 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 524 | /* |
| 525 | * Command send function for invalidating a device table entry |
| 526 | */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 527 | static int iommu_flush_device(struct device *dev) |
| 528 | { |
| 529 | struct amd_iommu *iommu; |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 530 | struct iommu_cmd cmd; |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 531 | u16 devid; |
| 532 | |
| 533 | devid = get_device_id(dev); |
| 534 | iommu = amd_iommu_rlookup_table[devid]; |
| 535 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 536 | /* Build command */ |
| 537 | memset(&cmd, 0, sizeof(cmd)); |
| 538 | CMD_SET_TYPE(&cmd, CMD_INV_DEV_ENTRY); |
| 539 | cmd.data[0] = devid; |
| 540 | |
| 541 | return iommu_queue_command(iommu, &cmd); |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 542 | } |
| 543 | |
Joerg Roedel | 237b6f3 | 2008-12-02 20:54:37 +0100 | [diff] [blame] | 544 | static void __iommu_build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 545 | u16 domid, int pde, int s) |
| 546 | { |
| 547 | memset(cmd, 0, sizeof(*cmd)); |
| 548 | address &= PAGE_MASK; |
| 549 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 550 | cmd->data[1] |= domid; |
| 551 | cmd->data[2] = lower_32_bits(address); |
| 552 | cmd->data[3] = upper_32_bits(address); |
| 553 | if (s) /* size bit - we flush more than one 4kb page */ |
| 554 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 555 | if (pde) /* PDE bit - we wan't flush everything not only the PTEs */ |
| 556 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 557 | } |
| 558 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 559 | /* |
| 560 | * Generic command send function for invalidaing TLB entries |
| 561 | */ |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 562 | static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu, |
| 563 | u64 address, u16 domid, int pde, int s) |
| 564 | { |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 565 | struct iommu_cmd cmd; |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 566 | int ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 567 | |
Joerg Roedel | 237b6f3 | 2008-12-02 20:54:37 +0100 | [diff] [blame] | 568 | __iommu_build_inv_iommu_pages(&cmd, address, domid, pde, s); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 569 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 570 | ret = iommu_queue_command(iommu, &cmd); |
| 571 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 572 | return ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 573 | } |
| 574 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 575 | /* |
| 576 | * TLB invalidation function which is called from the mapping functions. |
| 577 | * It invalidates a single PTE if the range to flush is within a single |
| 578 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 579 | */ |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 580 | static void __iommu_flush_pages(struct protection_domain *domain, |
| 581 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 582 | { |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 583 | int s = 0, i; |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 584 | unsigned long pages = iommu_num_pages(address, size, PAGE_SIZE); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 585 | |
| 586 | address &= PAGE_MASK; |
| 587 | |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 588 | if (pages > 1) { |
| 589 | /* |
| 590 | * If we have to flush more than one page, flush all |
| 591 | * TLB entries for this domain |
| 592 | */ |
| 593 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 594 | s = 1; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 595 | } |
| 596 | |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 597 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 598 | for (i = 0; i < amd_iommus_present; ++i) { |
| 599 | if (!domain->dev_iommu[i]) |
| 600 | continue; |
| 601 | |
| 602 | /* |
| 603 | * Devices of this domain are behind this IOMMU |
| 604 | * We need a TLB flush |
| 605 | */ |
| 606 | iommu_queue_inv_iommu_pages(amd_iommus[i], address, |
| 607 | domain->id, pde, s); |
| 608 | } |
| 609 | |
| 610 | return; |
| 611 | } |
| 612 | |
| 613 | static void iommu_flush_pages(struct protection_domain *domain, |
| 614 | u64 address, size_t size) |
| 615 | { |
| 616 | __iommu_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 617 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 618 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 619 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 620 | static void iommu_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 621 | { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 622 | __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 623 | } |
| 624 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 625 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 626 | static void iommu_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 627 | { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 628 | __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 629 | } |
| 630 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 631 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 632 | /* |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 633 | * This function flushes the DTEs for all devices in domain |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 634 | */ |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 635 | static void iommu_flush_domain_devices(struct protection_domain *domain) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 636 | { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 637 | struct iommu_dev_data *dev_data; |
| 638 | unsigned long flags; |
| 639 | |
| 640 | spin_lock_irqsave(&domain->lock, flags); |
| 641 | |
| 642 | list_for_each_entry(dev_data, &domain->dev_list, list) |
| 643 | iommu_flush_device(dev_data->dev); |
| 644 | |
| 645 | spin_unlock_irqrestore(&domain->lock, flags); |
| 646 | } |
| 647 | |
| 648 | static void iommu_flush_all_domain_devices(void) |
| 649 | { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 650 | struct protection_domain *domain; |
| 651 | unsigned long flags; |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 652 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 653 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 654 | |
| 655 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 656 | iommu_flush_domain_devices(domain); |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 657 | iommu_flush_complete(domain); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 658 | } |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 659 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 660 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 661 | } |
| 662 | |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 663 | void amd_iommu_flush_all_devices(void) |
| 664 | { |
| 665 | iommu_flush_all_domain_devices(); |
| 666 | } |
| 667 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 668 | /* |
| 669 | * This function uses heavy locking and may disable irqs for some time. But |
| 670 | * this is no issue because it is only called during resume. |
| 671 | */ |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 672 | void amd_iommu_flush_all_domains(void) |
| 673 | { |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 674 | struct protection_domain *domain; |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 675 | unsigned long flags; |
| 676 | |
| 677 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 678 | |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 679 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 680 | spin_lock(&domain->lock); |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 681 | iommu_flush_tlb_pde(domain); |
| 682 | iommu_flush_complete(domain); |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 683 | spin_unlock(&domain->lock); |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 684 | } |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 685 | |
| 686 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 687 | } |
| 688 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 689 | static void reset_iommu_command_buffer(struct amd_iommu *iommu) |
| 690 | { |
| 691 | pr_err("AMD-Vi: Resetting IOMMU command buffer\n"); |
| 692 | |
Joerg Roedel | b26e81b | 2009-09-03 15:08:09 +0200 | [diff] [blame] | 693 | if (iommu->reset_in_progress) |
| 694 | panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n"); |
| 695 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 696 | amd_iommu_reset_cmd_buffer(iommu); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 697 | amd_iommu_flush_all_devices(); |
| 698 | amd_iommu_flush_all_domains(); |
Joerg Roedel | b26e81b | 2009-09-03 15:08:09 +0200 | [diff] [blame] | 699 | |
| 700 | iommu->reset_in_progress = false; |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 701 | } |
| 702 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 703 | /**************************************************************************** |
| 704 | * |
| 705 | * The functions below are used the create the page table mappings for |
| 706 | * unity mapped regions. |
| 707 | * |
| 708 | ****************************************************************************/ |
| 709 | |
| 710 | /* |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 711 | * This function is used to add another level to an IO page table. Adding |
| 712 | * another level increases the size of the address space by 9 bits to a size up |
| 713 | * to 64 bits. |
| 714 | */ |
| 715 | static bool increase_address_space(struct protection_domain *domain, |
| 716 | gfp_t gfp) |
| 717 | { |
| 718 | u64 *pte; |
| 719 | |
| 720 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 721 | /* address space already 64 bit large */ |
| 722 | return false; |
| 723 | |
| 724 | pte = (void *)get_zeroed_page(gfp); |
| 725 | if (!pte) |
| 726 | return false; |
| 727 | |
| 728 | *pte = PM_LEVEL_PDE(domain->mode, |
| 729 | virt_to_phys(domain->pt_root)); |
| 730 | domain->pt_root = pte; |
| 731 | domain->mode += 1; |
| 732 | domain->updated = true; |
| 733 | |
| 734 | return true; |
| 735 | } |
| 736 | |
| 737 | static u64 *alloc_pte(struct protection_domain *domain, |
| 738 | unsigned long address, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 739 | unsigned long page_size, |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 740 | u64 **pte_page, |
| 741 | gfp_t gfp) |
| 742 | { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 743 | int level, end_lvl; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 744 | u64 *pte, *page; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 745 | |
| 746 | BUG_ON(!is_power_of_2(page_size)); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 747 | |
| 748 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 749 | increase_address_space(domain, gfp); |
| 750 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 751 | level = domain->mode - 1; |
| 752 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 753 | address = PAGE_SIZE_ALIGN(address, page_size); |
| 754 | end_lvl = PAGE_SIZE_LEVEL(page_size); |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 755 | |
| 756 | while (level > end_lvl) { |
| 757 | if (!IOMMU_PTE_PRESENT(*pte)) { |
| 758 | page = (u64 *)get_zeroed_page(gfp); |
| 759 | if (!page) |
| 760 | return NULL; |
| 761 | *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 762 | } |
| 763 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 764 | /* No level skipping support yet */ |
| 765 | if (PM_PTE_LEVEL(*pte) != level) |
| 766 | return NULL; |
| 767 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 768 | level -= 1; |
| 769 | |
| 770 | pte = IOMMU_PTE_PAGE(*pte); |
| 771 | |
| 772 | if (pte_page && level == end_lvl) |
| 773 | *pte_page = pte; |
| 774 | |
| 775 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
| 776 | } |
| 777 | |
| 778 | return pte; |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * This function checks if there is a PTE for a given dma address. If |
| 783 | * there is one, it returns the pointer to it. |
| 784 | */ |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 785 | static u64 *fetch_pte(struct protection_domain *domain, unsigned long address) |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 786 | { |
| 787 | int level; |
| 788 | u64 *pte; |
| 789 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 790 | if (address > PM_LEVEL_SIZE(domain->mode)) |
| 791 | return NULL; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 792 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 793 | level = domain->mode - 1; |
| 794 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 795 | |
| 796 | while (level > 0) { |
| 797 | |
| 798 | /* Not Present */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 799 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 800 | return NULL; |
| 801 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 802 | /* Large PTE */ |
| 803 | if (PM_PTE_LEVEL(*pte) == 0x07) { |
| 804 | unsigned long pte_mask, __pte; |
| 805 | |
| 806 | /* |
| 807 | * If we have a series of large PTEs, make |
| 808 | * sure to return a pointer to the first one. |
| 809 | */ |
| 810 | pte_mask = PTE_PAGE_SIZE(*pte); |
| 811 | pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1); |
| 812 | __pte = ((unsigned long)pte) & pte_mask; |
| 813 | |
| 814 | return (u64 *)__pte; |
| 815 | } |
| 816 | |
| 817 | /* No level skipping support yet */ |
| 818 | if (PM_PTE_LEVEL(*pte) != level) |
| 819 | return NULL; |
| 820 | |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 821 | level -= 1; |
| 822 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 823 | /* Walk to the next level */ |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 824 | pte = IOMMU_PTE_PAGE(*pte); |
| 825 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 308973d | 2009-11-24 17:43:32 +0100 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | return pte; |
| 829 | } |
| 830 | |
| 831 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 832 | * Generic mapping functions. It maps a physical address into a DMA |
| 833 | * address space. It allocates the page table pages if necessary. |
| 834 | * In the future it can be extended to a generic mapping function |
| 835 | * supporting all features of AMD IOMMU page tables like level skipping |
| 836 | * and full 64 bit address spaces. |
| 837 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 838 | static int iommu_map_page(struct protection_domain *dom, |
| 839 | unsigned long bus_addr, |
| 840 | unsigned long phys_addr, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 841 | int prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 842 | unsigned long page_size) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 843 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 844 | u64 __pte, *pte; |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 845 | int i, count; |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 846 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 847 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 848 | return -EINVAL; |
| 849 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 850 | bus_addr = PAGE_ALIGN(bus_addr); |
| 851 | phys_addr = PAGE_ALIGN(phys_addr); |
| 852 | count = PAGE_SIZE_PTE_COUNT(page_size); |
| 853 | pte = alloc_pte(dom, bus_addr, page_size, NULL, GFP_KERNEL); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 854 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 855 | for (i = 0; i < count; ++i) |
| 856 | if (IOMMU_PTE_PRESENT(pte[i])) |
| 857 | return -EBUSY; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 858 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 859 | if (page_size > PAGE_SIZE) { |
| 860 | __pte = PAGE_SIZE_PTE(phys_addr, page_size); |
| 861 | __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 862 | } else |
| 863 | __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 864 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 865 | if (prot & IOMMU_PROT_IR) |
| 866 | __pte |= IOMMU_PTE_IR; |
| 867 | if (prot & IOMMU_PROT_IW) |
| 868 | __pte |= IOMMU_PTE_IW; |
| 869 | |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 870 | for (i = 0; i < count; ++i) |
| 871 | pte[i] = __pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 872 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 873 | update_domain(dom); |
| 874 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 875 | return 0; |
| 876 | } |
| 877 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 878 | static unsigned long iommu_unmap_page(struct protection_domain *dom, |
| 879 | unsigned long bus_addr, |
| 880 | unsigned long page_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 881 | { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 882 | unsigned long long unmap_size, unmapped; |
| 883 | u64 *pte; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 884 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 885 | BUG_ON(!is_power_of_2(page_size)); |
| 886 | |
| 887 | unmapped = 0; |
| 888 | |
| 889 | while (unmapped < page_size) { |
| 890 | |
| 891 | pte = fetch_pte(dom, bus_addr); |
| 892 | |
| 893 | if (!pte) { |
| 894 | /* |
| 895 | * No PTE for this address |
| 896 | * move forward in 4kb steps |
| 897 | */ |
| 898 | unmap_size = PAGE_SIZE; |
| 899 | } else if (PM_PTE_LEVEL(*pte) == 0) { |
| 900 | /* 4kb PTE found for this address */ |
| 901 | unmap_size = PAGE_SIZE; |
| 902 | *pte = 0ULL; |
| 903 | } else { |
| 904 | int count, i; |
| 905 | |
| 906 | /* Large PTE found which maps this address */ |
| 907 | unmap_size = PTE_PAGE_SIZE(*pte); |
| 908 | count = PAGE_SIZE_PTE_COUNT(unmap_size); |
| 909 | for (i = 0; i < count; i++) |
| 910 | pte[i] = 0ULL; |
| 911 | } |
| 912 | |
| 913 | bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size; |
| 914 | unmapped += unmap_size; |
| 915 | } |
| 916 | |
| 917 | BUG_ON(!is_power_of_2(unmapped)); |
| 918 | |
| 919 | return unmapped; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 920 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 921 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 922 | /* |
| 923 | * This function checks if a specific unity mapping entry is needed for |
| 924 | * this specific IOMMU. |
| 925 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 926 | static int iommu_for_unity_map(struct amd_iommu *iommu, |
| 927 | struct unity_map_entry *entry) |
| 928 | { |
| 929 | u16 bdf, i; |
| 930 | |
| 931 | for (i = entry->devid_start; i <= entry->devid_end; ++i) { |
| 932 | bdf = amd_iommu_alias_table[i]; |
| 933 | if (amd_iommu_rlookup_table[bdf] == iommu) |
| 934 | return 1; |
| 935 | } |
| 936 | |
| 937 | return 0; |
| 938 | } |
| 939 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 940 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 941 | * This function actually applies the mapping to the page table of the |
| 942 | * dma_ops domain. |
| 943 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 944 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 945 | struct unity_map_entry *e) |
| 946 | { |
| 947 | u64 addr; |
| 948 | int ret; |
| 949 | |
| 950 | for (addr = e->address_start; addr < e->address_end; |
| 951 | addr += PAGE_SIZE) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 952 | ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 953 | PAGE_SIZE); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 954 | if (ret) |
| 955 | return ret; |
| 956 | /* |
| 957 | * if unity mapping is in aperture range mark the page |
| 958 | * as allocated in the aperture |
| 959 | */ |
| 960 | if (addr < dma_dom->aperture_size) |
Joerg Roedel | c323956 | 2009-05-12 10:56:44 +0200 | [diff] [blame] | 961 | __set_bit(addr >> PAGE_SHIFT, |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 962 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | return 0; |
| 966 | } |
| 967 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 968 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 969 | * Init the unity mappings for a specific IOMMU in the system |
| 970 | * |
| 971 | * Basically iterates over all unity mapping entries and applies them to |
| 972 | * the default domain DMA of that IOMMU if necessary. |
| 973 | */ |
| 974 | static int iommu_init_unity_mappings(struct amd_iommu *iommu) |
| 975 | { |
| 976 | struct unity_map_entry *entry; |
| 977 | int ret; |
| 978 | |
| 979 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 980 | if (!iommu_for_unity_map(iommu, entry)) |
| 981 | continue; |
| 982 | ret = dma_ops_unity_map(iommu->default_dom, entry); |
| 983 | if (ret) |
| 984 | return ret; |
| 985 | } |
| 986 | |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 991 | * Inits the unity mappings required for a specific device |
| 992 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 993 | static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, |
| 994 | u16 devid) |
| 995 | { |
| 996 | struct unity_map_entry *e; |
| 997 | int ret; |
| 998 | |
| 999 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 1000 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 1001 | continue; |
| 1002 | ret = dma_ops_unity_map(dma_dom, e); |
| 1003 | if (ret) |
| 1004 | return ret; |
| 1005 | } |
| 1006 | |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1010 | /**************************************************************************** |
| 1011 | * |
| 1012 | * The next functions belong to the address allocator for the dma_ops |
| 1013 | * interface functions. They work like the allocators in the other IOMMU |
| 1014 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 1015 | * the aperture. Maybe it could be enhanced in the future to a more |
| 1016 | * efficient allocator. |
| 1017 | * |
| 1018 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1019 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1020 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1021 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1022 | * |
| 1023 | * called with domain->lock held |
| 1024 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1025 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1026 | /* |
Joerg Roedel | 171e7b3 | 2009-11-24 17:47:56 +0100 | [diff] [blame] | 1027 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 1028 | * ranges. |
| 1029 | */ |
| 1030 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 1031 | unsigned long start_page, |
| 1032 | unsigned int pages) |
| 1033 | { |
| 1034 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
| 1035 | |
| 1036 | if (start_page + pages > last_page) |
| 1037 | pages = last_page - start_page; |
| 1038 | |
| 1039 | for (i = start_page; i < start_page + pages; ++i) { |
| 1040 | int index = i / APERTURE_RANGE_PAGES; |
| 1041 | int page = i % APERTURE_RANGE_PAGES; |
| 1042 | __set_bit(page, dom->aperture[index]->bitmap); |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1047 | * This function is used to add a new aperture range to an existing |
| 1048 | * aperture in case of dma_ops domain allocation or address allocation |
| 1049 | * failure. |
| 1050 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1051 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1052 | bool populate, gfp_t gfp) |
| 1053 | { |
| 1054 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1055 | struct amd_iommu *iommu; |
Joerg Roedel | d91afd1 | 2010-01-22 16:40:20 +0100 | [diff] [blame] | 1056 | unsigned long i; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1057 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 1058 | #ifdef CONFIG_IOMMU_STRESS |
| 1059 | populate = false; |
| 1060 | #endif |
| 1061 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1062 | if (index >= APERTURE_MAX_RANGES) |
| 1063 | return -ENOMEM; |
| 1064 | |
| 1065 | dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp); |
| 1066 | if (!dma_dom->aperture[index]) |
| 1067 | return -ENOMEM; |
| 1068 | |
| 1069 | dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp); |
| 1070 | if (!dma_dom->aperture[index]->bitmap) |
| 1071 | goto out_free; |
| 1072 | |
| 1073 | dma_dom->aperture[index]->offset = dma_dom->aperture_size; |
| 1074 | |
| 1075 | if (populate) { |
| 1076 | unsigned long address = dma_dom->aperture_size; |
| 1077 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 1078 | u64 *pte, *pte_page; |
| 1079 | |
| 1080 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1081 | pte = alloc_pte(&dma_dom->domain, address, PAGE_SIZE, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1082 | &pte_page, gfp); |
| 1083 | if (!pte) |
| 1084 | goto out_free; |
| 1085 | |
| 1086 | dma_dom->aperture[index]->pte_pages[i] = pte_page; |
| 1087 | |
| 1088 | address += APERTURE_RANGE_SIZE / 64; |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
| 1093 | |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1094 | /* Initialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1095 | for_each_iommu(iommu) { |
| 1096 | if (iommu->exclusion_start && |
| 1097 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 1098 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 1099 | unsigned long startpage; |
| 1100 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 1101 | iommu->exclusion_length, |
| 1102 | PAGE_SIZE); |
| 1103 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 1104 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 1105 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * Check for areas already mapped as present in the new aperture |
| 1110 | * range and mark those pages as reserved in the allocator. Such |
| 1111 | * mappings may already exist as a result of requested unity |
| 1112 | * mappings for devices. |
| 1113 | */ |
| 1114 | for (i = dma_dom->aperture[index]->offset; |
| 1115 | i < dma_dom->aperture_size; |
| 1116 | i += PAGE_SIZE) { |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 1117 | u64 *pte = fetch_pte(&dma_dom->domain, i); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 1118 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 1119 | continue; |
| 1120 | |
| 1121 | dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1); |
| 1122 | } |
| 1123 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1124 | update_domain(&dma_dom->domain); |
| 1125 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1126 | return 0; |
| 1127 | |
| 1128 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1129 | update_domain(&dma_dom->domain); |
| 1130 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 1131 | free_page((unsigned long)dma_dom->aperture[index]->bitmap); |
| 1132 | |
| 1133 | kfree(dma_dom->aperture[index]); |
| 1134 | dma_dom->aperture[index] = NULL; |
| 1135 | |
| 1136 | return -ENOMEM; |
| 1137 | } |
| 1138 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1139 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 1140 | struct dma_ops_domain *dom, |
| 1141 | unsigned int pages, |
| 1142 | unsigned long align_mask, |
| 1143 | u64 dma_mask, |
| 1144 | unsigned long start) |
| 1145 | { |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1146 | unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1147 | int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 1148 | int i = start >> APERTURE_RANGE_SHIFT; |
| 1149 | unsigned long boundary_size; |
| 1150 | unsigned long address = -1; |
| 1151 | unsigned long limit; |
| 1152 | |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1153 | next_bit >>= PAGE_SHIFT; |
| 1154 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1155 | boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
| 1156 | PAGE_SIZE) >> PAGE_SHIFT; |
| 1157 | |
| 1158 | for (;i < max_index; ++i) { |
| 1159 | unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; |
| 1160 | |
| 1161 | if (dom->aperture[i]->offset >= dma_mask) |
| 1162 | break; |
| 1163 | |
| 1164 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 1165 | dma_mask >> PAGE_SHIFT); |
| 1166 | |
| 1167 | address = iommu_area_alloc(dom->aperture[i]->bitmap, |
| 1168 | limit, next_bit, pages, 0, |
| 1169 | boundary_size, align_mask); |
| 1170 | if (address != -1) { |
| 1171 | address = dom->aperture[i]->offset + |
| 1172 | (address << PAGE_SHIFT); |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1173 | dom->next_address = address + (pages << PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1174 | break; |
| 1175 | } |
| 1176 | |
| 1177 | next_bit = 0; |
| 1178 | } |
| 1179 | |
| 1180 | return address; |
| 1181 | } |
| 1182 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1183 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 1184 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1185 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1186 | unsigned long align_mask, |
| 1187 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1188 | { |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1189 | unsigned long address; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1190 | |
Joerg Roedel | fe16f08 | 2009-05-22 12:27:53 +0200 | [diff] [blame] | 1191 | #ifdef CONFIG_IOMMU_STRESS |
| 1192 | dom->next_address = 0; |
| 1193 | dom->need_flush = true; |
| 1194 | #endif |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1195 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1196 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1197 | dma_mask, dom->next_address); |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1198 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1199 | if (address == -1) { |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1200 | dom->next_address = 0; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1201 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
| 1202 | dma_mask, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1203 | dom->need_flush = true; |
| 1204 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1205 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1206 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1207 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1208 | |
| 1209 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 1210 | |
| 1211 | return address; |
| 1212 | } |
| 1213 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1214 | /* |
| 1215 | * The address free function. |
| 1216 | * |
| 1217 | * called with domain->lock held |
| 1218 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1219 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 1220 | unsigned long address, |
| 1221 | unsigned int pages) |
| 1222 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1223 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 1224 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1225 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1226 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 1227 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 1228 | #ifdef CONFIG_IOMMU_STRESS |
| 1229 | if (i < 4) |
| 1230 | return; |
| 1231 | #endif |
| 1232 | |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1233 | if (address >= dom->next_address) |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1234 | dom->need_flush = true; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1235 | |
| 1236 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1237 | |
Akinobu Mita | a66022c | 2009-12-15 16:48:28 -0800 | [diff] [blame] | 1238 | bitmap_clear(range->bitmap, address, pages); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1239 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 1240 | } |
| 1241 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1242 | /**************************************************************************** |
| 1243 | * |
| 1244 | * The next functions belong to the domain allocation. A domain is |
| 1245 | * allocated for every IOMMU as the default domain. If device isolation |
| 1246 | * is enabled, every device get its own domain. The most important thing |
| 1247 | * about domains is the page table mapping the DMA address space they |
| 1248 | * contain. |
| 1249 | * |
| 1250 | ****************************************************************************/ |
| 1251 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1252 | /* |
| 1253 | * This function adds a protection domain to the global protection domain list |
| 1254 | */ |
| 1255 | static void add_domain_to_list(struct protection_domain *domain) |
| 1256 | { |
| 1257 | unsigned long flags; |
| 1258 | |
| 1259 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1260 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1261 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1262 | } |
| 1263 | |
| 1264 | /* |
| 1265 | * This function removes a protection domain to the global |
| 1266 | * protection domain list |
| 1267 | */ |
| 1268 | static void del_domain_from_list(struct protection_domain *domain) |
| 1269 | { |
| 1270 | unsigned long flags; |
| 1271 | |
| 1272 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1273 | list_del(&domain->list); |
| 1274 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1275 | } |
| 1276 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1277 | static u16 domain_id_alloc(void) |
| 1278 | { |
| 1279 | unsigned long flags; |
| 1280 | int id; |
| 1281 | |
| 1282 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1283 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1284 | BUG_ON(id == 0); |
| 1285 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1286 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1287 | else |
| 1288 | id = 0; |
| 1289 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1290 | |
| 1291 | return id; |
| 1292 | } |
| 1293 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1294 | static void domain_id_free(int id) |
| 1295 | { |
| 1296 | unsigned long flags; |
| 1297 | |
| 1298 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1299 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1300 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1301 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1302 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1303 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1304 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1305 | { |
| 1306 | int i, j; |
| 1307 | u64 *p1, *p2, *p3; |
| 1308 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1309 | p1 = domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1310 | |
| 1311 | if (!p1) |
| 1312 | return; |
| 1313 | |
| 1314 | for (i = 0; i < 512; ++i) { |
| 1315 | if (!IOMMU_PTE_PRESENT(p1[i])) |
| 1316 | continue; |
| 1317 | |
| 1318 | p2 = IOMMU_PTE_PAGE(p1[i]); |
Joerg Roedel | 3cc3d84 | 2008-12-04 16:44:31 +0100 | [diff] [blame] | 1319 | for (j = 0; j < 512; ++j) { |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1320 | if (!IOMMU_PTE_PRESENT(p2[j])) |
| 1321 | continue; |
| 1322 | p3 = IOMMU_PTE_PAGE(p2[j]); |
| 1323 | free_page((unsigned long)p3); |
| 1324 | } |
| 1325 | |
| 1326 | free_page((unsigned long)p2); |
| 1327 | } |
| 1328 | |
| 1329 | free_page((unsigned long)p1); |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1330 | |
| 1331 | domain->pt_root = NULL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1332 | } |
| 1333 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1334 | /* |
| 1335 | * Free a domain, only used if something went wrong in the |
| 1336 | * allocation path and we need to free an already allocated page table |
| 1337 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1338 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1339 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1340 | int i; |
| 1341 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1342 | if (!dom) |
| 1343 | return; |
| 1344 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1345 | del_domain_from_list(&dom->domain); |
| 1346 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1347 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1348 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1349 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1350 | if (!dom->aperture[i]) |
| 1351 | continue; |
| 1352 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 1353 | kfree(dom->aperture[i]); |
| 1354 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1355 | |
| 1356 | kfree(dom); |
| 1357 | } |
| 1358 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1359 | /* |
| 1360 | * Allocates a new protection domain usable for the dma_ops functions. |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1361 | * It also initializes the page table and the address allocator data |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1362 | * structures required for the dma_ops interface |
| 1363 | */ |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1364 | static struct dma_ops_domain *dma_ops_domain_alloc(void) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1365 | { |
| 1366 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1367 | |
| 1368 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 1369 | if (!dma_dom) |
| 1370 | return NULL; |
| 1371 | |
| 1372 | spin_lock_init(&dma_dom->domain.lock); |
| 1373 | |
| 1374 | dma_dom->domain.id = domain_id_alloc(); |
| 1375 | if (dma_dom->domain.id == 0) |
| 1376 | goto free_dma_dom; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1377 | INIT_LIST_HEAD(&dma_dom->domain.dev_list); |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 1378 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1379 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 1380 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1381 | dma_dom->domain.priv = dma_dom; |
| 1382 | if (!dma_dom->domain.pt_root) |
| 1383 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1384 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1385 | dma_dom->need_flush = false; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1386 | dma_dom->target_dev = 0xffff; |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1387 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1388 | add_domain_to_list(&dma_dom->domain); |
| 1389 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1390 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1391 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1392 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1393 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1394 | * mark the first page as allocated so we never return 0 as |
| 1395 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1396 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1397 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | 803b8cb4 | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1398 | dma_dom->next_address = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1399 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1400 | |
| 1401 | return dma_dom; |
| 1402 | |
| 1403 | free_dma_dom: |
| 1404 | dma_ops_domain_free(dma_dom); |
| 1405 | |
| 1406 | return NULL; |
| 1407 | } |
| 1408 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1409 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1410 | * little helper function to check whether a given protection domain is a |
| 1411 | * dma_ops domain |
| 1412 | */ |
| 1413 | static bool dma_ops_domain(struct protection_domain *domain) |
| 1414 | { |
| 1415 | return domain->flags & PD_DMA_OPS_MASK; |
| 1416 | } |
| 1417 | |
Joerg Roedel | 407d733 | 2009-09-02 16:07:00 +0200 | [diff] [blame] | 1418 | static void set_dte_entry(u16 devid, struct protection_domain *domain) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1419 | { |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1420 | u64 pte_root = virt_to_phys(domain->pt_root); |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 1421 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 1422 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 1423 | << DEV_ENTRY_MODE_SHIFT; |
| 1424 | 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] | 1425 | |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1426 | amd_iommu_dev_table[devid].data[2] = domain->id; |
Joerg Roedel | aa879ff | 2009-08-31 16:01:48 +0200 | [diff] [blame] | 1427 | amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); |
| 1428 | amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1429 | } |
| 1430 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1431 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1432 | { |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1433 | /* remove entry from the device table seen by the hardware */ |
| 1434 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 1435 | amd_iommu_dev_table[devid].data[1] = 0; |
| 1436 | amd_iommu_dev_table[devid].data[2] = 0; |
| 1437 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1438 | amd_iommu_apply_erratum_63(devid); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1439 | } |
| 1440 | |
| 1441 | static void do_attach(struct device *dev, struct protection_domain *domain) |
| 1442 | { |
| 1443 | struct iommu_dev_data *dev_data; |
| 1444 | struct amd_iommu *iommu; |
| 1445 | u16 devid; |
| 1446 | |
| 1447 | devid = get_device_id(dev); |
| 1448 | iommu = amd_iommu_rlookup_table[devid]; |
| 1449 | dev_data = get_dev_data(dev); |
| 1450 | |
| 1451 | /* Update data structures */ |
| 1452 | dev_data->domain = domain; |
| 1453 | list_add(&dev_data->list, &domain->dev_list); |
| 1454 | set_dte_entry(devid, domain); |
| 1455 | |
| 1456 | /* Do reference counting */ |
| 1457 | domain->dev_iommu[iommu->index] += 1; |
| 1458 | domain->dev_cnt += 1; |
| 1459 | |
| 1460 | /* Flush the DTE entry */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1461 | iommu_flush_device(dev); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1462 | } |
| 1463 | |
| 1464 | static void do_detach(struct device *dev) |
| 1465 | { |
| 1466 | struct iommu_dev_data *dev_data; |
| 1467 | struct amd_iommu *iommu; |
| 1468 | u16 devid; |
| 1469 | |
| 1470 | devid = get_device_id(dev); |
| 1471 | iommu = amd_iommu_rlookup_table[devid]; |
| 1472 | dev_data = get_dev_data(dev); |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1473 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1474 | /* decrease reference counters */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1475 | dev_data->domain->dev_iommu[iommu->index] -= 1; |
| 1476 | dev_data->domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1477 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1478 | /* Update data structures */ |
| 1479 | dev_data->domain = NULL; |
| 1480 | list_del(&dev_data->list); |
| 1481 | clear_dte_entry(devid); |
| 1482 | |
| 1483 | /* Flush the DTE entry */ |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1484 | iommu_flush_device(dev); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1485 | } |
| 1486 | |
| 1487 | /* |
| 1488 | * If a device is not yet associated with a domain, this function does |
| 1489 | * assigns it visible for the hardware |
| 1490 | */ |
| 1491 | static int __attach_device(struct device *dev, |
| 1492 | struct protection_domain *domain) |
| 1493 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1494 | struct iommu_dev_data *dev_data, *alias_data; |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1495 | int ret; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1496 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1497 | dev_data = get_dev_data(dev); |
| 1498 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1499 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1500 | if (!alias_data) |
| 1501 | return -EINVAL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1502 | |
| 1503 | /* lock domain */ |
| 1504 | spin_lock(&domain->lock); |
| 1505 | |
| 1506 | /* Some sanity checks */ |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1507 | ret = -EBUSY; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1508 | if (alias_data->domain != NULL && |
| 1509 | alias_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1510 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1511 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1512 | if (dev_data->domain != NULL && |
| 1513 | dev_data->domain != domain) |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1514 | goto out_unlock; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1515 | |
| 1516 | /* Do real assignment */ |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1517 | if (dev_data->alias != dev) { |
| 1518 | alias_data = get_dev_data(dev_data->alias); |
| 1519 | if (alias_data->domain == NULL) |
| 1520 | do_attach(dev_data->alias, domain); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1521 | |
| 1522 | atomic_inc(&alias_data->bind); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1523 | } |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1524 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1525 | if (dev_data->domain == NULL) |
| 1526 | do_attach(dev, domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1527 | |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1528 | atomic_inc(&dev_data->bind); |
| 1529 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1530 | ret = 0; |
| 1531 | |
| 1532 | out_unlock: |
| 1533 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1534 | /* ready */ |
| 1535 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1536 | |
Julia Lawall | 84fe6c1 | 2010-05-27 12:31:51 +0200 | [diff] [blame] | 1537 | return ret; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1538 | } |
| 1539 | |
| 1540 | /* |
| 1541 | * If a device is not yet associated with a domain, this function does |
| 1542 | * assigns it visible for the hardware |
| 1543 | */ |
| 1544 | static int attach_device(struct device *dev, |
| 1545 | struct protection_domain *domain) |
| 1546 | { |
| 1547 | unsigned long flags; |
| 1548 | int ret; |
| 1549 | |
| 1550 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1551 | ret = __attach_device(dev, domain); |
| 1552 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1553 | |
| 1554 | /* |
| 1555 | * We might boot into a crash-kernel here. The crashed kernel |
| 1556 | * left the caches in the IOMMU dirty. So we have to flush |
| 1557 | * here to evict all dirty stuff. |
| 1558 | */ |
| 1559 | iommu_flush_tlb_pde(domain); |
| 1560 | |
| 1561 | return ret; |
| 1562 | } |
| 1563 | |
| 1564 | /* |
| 1565 | * Removes a device from a protection domain (unlocked) |
| 1566 | */ |
| 1567 | static void __detach_device(struct device *dev) |
| 1568 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1569 | struct iommu_dev_data *dev_data = get_dev_data(dev); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1570 | struct iommu_dev_data *alias_data; |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1571 | struct protection_domain *domain; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 1572 | unsigned long flags; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1573 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1574 | BUG_ON(!dev_data->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1575 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1576 | domain = dev_data->domain; |
| 1577 | |
| 1578 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1579 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1580 | if (dev_data->alias != dev) { |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1581 | alias_data = get_dev_data(dev_data->alias); |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1582 | if (atomic_dec_and_test(&alias_data->bind)) |
| 1583 | do_detach(dev_data->alias); |
Joerg Roedel | 2410005 | 2009-11-25 15:59:57 +0100 | [diff] [blame] | 1584 | } |
| 1585 | |
Joerg Roedel | 7f760dd | 2009-11-26 14:49:59 +0100 | [diff] [blame] | 1586 | if (atomic_dec_and_test(&dev_data->bind)) |
| 1587 | do_detach(dev); |
| 1588 | |
Joerg Roedel | 2ca7627 | 2010-01-22 16:45:31 +0100 | [diff] [blame] | 1589 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1590 | |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1591 | /* |
| 1592 | * 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] | 1593 | * passthrough domain if it is detached from any other domain. |
| 1594 | * Make sure we can deassign from the pt_domain itself. |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1595 | */ |
Joerg Roedel | d3ad937 | 2010-01-22 17:55:27 +0100 | [diff] [blame] | 1596 | if (iommu_pass_through && |
| 1597 | (dev_data->domain == NULL && domain != pt_domain)) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1598 | __attach_device(dev, pt_domain); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1599 | } |
| 1600 | |
| 1601 | /* |
| 1602 | * Removes a device from a protection domain (with devtable_lock held) |
| 1603 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1604 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1605 | { |
| 1606 | unsigned long flags; |
| 1607 | |
| 1608 | /* lock device table */ |
| 1609 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1610 | __detach_device(dev); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1611 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1612 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1613 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1614 | /* |
| 1615 | * Find out the protection domain structure for a given PCI device. This |
| 1616 | * will give us the pointer to the page table root for example. |
| 1617 | */ |
| 1618 | static struct protection_domain *domain_for_device(struct device *dev) |
| 1619 | { |
| 1620 | struct protection_domain *dom; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1621 | struct iommu_dev_data *dev_data, *alias_data; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1622 | unsigned long flags; |
| 1623 | u16 devid, alias; |
| 1624 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1625 | devid = get_device_id(dev); |
| 1626 | alias = amd_iommu_alias_table[devid]; |
| 1627 | dev_data = get_dev_data(dev); |
| 1628 | alias_data = get_dev_data(dev_data->alias); |
| 1629 | if (!alias_data) |
| 1630 | return NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1631 | |
| 1632 | read_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1633 | dom = dev_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1634 | if (dom == NULL && |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1635 | alias_data->domain != NULL) { |
| 1636 | __attach_device(dev, alias_data->domain); |
| 1637 | dom = alias_data->domain; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1638 | } |
| 1639 | |
| 1640 | read_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1641 | |
| 1642 | return dom; |
| 1643 | } |
| 1644 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1645 | static int device_change_notifier(struct notifier_block *nb, |
| 1646 | unsigned long action, void *data) |
| 1647 | { |
| 1648 | struct device *dev = data; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1649 | u16 devid; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1650 | struct protection_domain *domain; |
| 1651 | struct dma_ops_domain *dma_domain; |
| 1652 | struct amd_iommu *iommu; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1653 | unsigned long flags; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1654 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1655 | if (!check_device(dev)) |
| 1656 | return 0; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1657 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 1658 | devid = get_device_id(dev); |
| 1659 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1660 | |
| 1661 | switch (action) { |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 1662 | case BUS_NOTIFY_UNBOUND_DRIVER: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1663 | |
| 1664 | domain = domain_for_device(dev); |
| 1665 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1666 | if (!domain) |
| 1667 | goto out; |
Joerg Roedel | a1ca331 | 2009-09-01 12:22:22 +0200 | [diff] [blame] | 1668 | if (iommu_pass_through) |
| 1669 | break; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1670 | detach_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1671 | break; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1672 | case BUS_NOTIFY_ADD_DEVICE: |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1673 | |
| 1674 | iommu_init_device(dev); |
| 1675 | |
| 1676 | domain = domain_for_device(dev); |
| 1677 | |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1678 | /* allocate a protection domain if a device is added */ |
| 1679 | dma_domain = find_protection_domain(devid); |
| 1680 | if (dma_domain) |
| 1681 | goto out; |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 1682 | dma_domain = dma_ops_domain_alloc(); |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1683 | if (!dma_domain) |
| 1684 | goto out; |
| 1685 | dma_domain->target_dev = devid; |
| 1686 | |
| 1687 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 1688 | list_add_tail(&dma_domain->list, &iommu_pd_list); |
| 1689 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 1690 | |
| 1691 | break; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 1692 | case BUS_NOTIFY_DEL_DEVICE: |
| 1693 | |
| 1694 | iommu_uninit_device(dev); |
| 1695 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1696 | default: |
| 1697 | goto out; |
| 1698 | } |
| 1699 | |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 1700 | iommu_flush_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1701 | iommu_completion_wait(iommu); |
| 1702 | |
| 1703 | out: |
| 1704 | return 0; |
| 1705 | } |
| 1706 | |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 1707 | static struct notifier_block device_nb = { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1708 | .notifier_call = device_change_notifier, |
| 1709 | }; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1710 | |
Joerg Roedel | 8638c49 | 2009-12-10 11:12:25 +0100 | [diff] [blame] | 1711 | void amd_iommu_init_notifier(void) |
| 1712 | { |
| 1713 | bus_register_notifier(&pci_bus_type, &device_nb); |
| 1714 | } |
| 1715 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1716 | /***************************************************************************** |
| 1717 | * |
| 1718 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 1719 | * |
| 1720 | *****************************************************************************/ |
| 1721 | |
| 1722 | /* |
| 1723 | * In the dma_ops path we only have the struct device. This function |
| 1724 | * finds the corresponding IOMMU, the protection domain and the |
| 1725 | * requestor id for a given device. |
| 1726 | * If the device is not yet associated with a domain this is also done |
| 1727 | * in this function. |
| 1728 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1729 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1730 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1731 | struct protection_domain *domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1732 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1733 | u16 devid = get_device_id(dev); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1734 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1735 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1736 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1737 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1738 | domain = domain_for_device(dev); |
| 1739 | if (domain != NULL && !dma_ops_domain(domain)) |
| 1740 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1741 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1742 | if (domain != NULL) |
| 1743 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1744 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1745 | /* Device not bount yet - bind it */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1746 | dma_dom = find_protection_domain(devid); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1747 | if (!dma_dom) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1748 | dma_dom = amd_iommu_rlookup_table[devid]->default_dom; |
| 1749 | attach_device(dev, &dma_dom->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1750 | DUMP_printk("Using protection domain %d for device %s\n", |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1751 | dma_dom->domain.id, dev_name(dev)); |
Joerg Roedel | f91ba19 | 2008-11-25 12:56:12 +0100 | [diff] [blame] | 1752 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 1753 | return &dma_dom->domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1754 | } |
| 1755 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1756 | static void update_device_table(struct protection_domain *domain) |
| 1757 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1758 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1759 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 1760 | list_for_each_entry(dev_data, &domain->dev_list, list) { |
| 1761 | u16 devid = get_device_id(dev_data->dev); |
| 1762 | set_dte_entry(devid, domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | static void update_domain(struct protection_domain *domain) |
| 1767 | { |
| 1768 | if (!domain->updated) |
| 1769 | return; |
| 1770 | |
| 1771 | update_device_table(domain); |
Joerg Roedel | b00d3bc | 2009-11-26 15:35:33 +0100 | [diff] [blame] | 1772 | iommu_flush_domain_devices(domain); |
Joerg Roedel | 601367d | 2009-11-20 16:08:55 +0100 | [diff] [blame] | 1773 | iommu_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1774 | |
| 1775 | domain->updated = false; |
| 1776 | } |
| 1777 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1778 | /* |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1779 | * This function fetches the PTE for a given address in the aperture |
| 1780 | */ |
| 1781 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 1782 | unsigned long address) |
| 1783 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1784 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1785 | u64 *pte, *pte_page; |
| 1786 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1787 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1788 | if (!aperture) |
| 1789 | return NULL; |
| 1790 | |
| 1791 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1792 | if (!pte) { |
Joerg Roedel | cbb9d72 | 2010-01-15 14:41:15 +0100 | [diff] [blame] | 1793 | pte = alloc_pte(&dom->domain, address, PAGE_SIZE, &pte_page, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1794 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1795 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 1796 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1797 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1798 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1799 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1800 | |
| 1801 | return pte; |
| 1802 | } |
| 1803 | |
| 1804 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1805 | * This is the generic map function. It maps one 4kb page at paddr to |
| 1806 | * the given address in the DMA address space for the domain. |
| 1807 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1808 | 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] | 1809 | unsigned long address, |
| 1810 | phys_addr_t paddr, |
| 1811 | int direction) |
| 1812 | { |
| 1813 | u64 *pte, __pte; |
| 1814 | |
| 1815 | WARN_ON(address > dom->aperture_size); |
| 1816 | |
| 1817 | paddr &= PAGE_MASK; |
| 1818 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1819 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1820 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1821 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1822 | |
| 1823 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1824 | |
| 1825 | if (direction == DMA_TO_DEVICE) |
| 1826 | __pte |= IOMMU_PTE_IR; |
| 1827 | else if (direction == DMA_FROM_DEVICE) |
| 1828 | __pte |= IOMMU_PTE_IW; |
| 1829 | else if (direction == DMA_BIDIRECTIONAL) |
| 1830 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 1831 | |
| 1832 | WARN_ON(*pte); |
| 1833 | |
| 1834 | *pte = __pte; |
| 1835 | |
| 1836 | return (dma_addr_t)address; |
| 1837 | } |
| 1838 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1839 | /* |
| 1840 | * The generic unmapping function for on page in the DMA address space. |
| 1841 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1842 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1843 | unsigned long address) |
| 1844 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1845 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1846 | u64 *pte; |
| 1847 | |
| 1848 | if (address >= dom->aperture_size) |
| 1849 | return; |
| 1850 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1851 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1852 | if (!aperture) |
| 1853 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1854 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1855 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 1856 | if (!pte) |
| 1857 | return; |
| 1858 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1859 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1860 | |
| 1861 | WARN_ON(!*pte); |
| 1862 | |
| 1863 | *pte = 0ULL; |
| 1864 | } |
| 1865 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1866 | /* |
| 1867 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 1868 | * contiguous memory region into DMA address space. It is used by all |
| 1869 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1870 | * Must be called with the domain lock held. |
| 1871 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1872 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1873 | struct dma_ops_domain *dma_dom, |
| 1874 | phys_addr_t paddr, |
| 1875 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1876 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1877 | bool align, |
| 1878 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1879 | { |
| 1880 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1881 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1882 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1883 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1884 | int i; |
| 1885 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1886 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1887 | paddr &= PAGE_MASK; |
| 1888 | |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 1889 | INC_STATS_COUNTER(total_map_requests); |
| 1890 | |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 1891 | if (pages > 1) |
| 1892 | INC_STATS_COUNTER(cross_page); |
| 1893 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1894 | if (align) |
| 1895 | align_mask = (1UL << get_order(size)) - 1; |
| 1896 | |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1897 | retry: |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1898 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 1899 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1900 | if (unlikely(address == DMA_ERROR_CODE)) { |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1901 | /* |
| 1902 | * setting next_address here will let the address |
| 1903 | * allocator only scan the new allocated range in the |
| 1904 | * first run. This is a small optimization. |
| 1905 | */ |
| 1906 | dma_dom->next_address = dma_dom->aperture_size; |
| 1907 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1908 | if (alloc_new_range(dma_dom, false, GFP_ATOMIC)) |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1909 | goto out; |
| 1910 | |
| 1911 | /* |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 1912 | * aperture was successfully enlarged by 128 MB, try |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1913 | * allocation again |
| 1914 | */ |
| 1915 | goto retry; |
| 1916 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1917 | |
| 1918 | start = address; |
| 1919 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1920 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1921 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1922 | goto out_unmap; |
| 1923 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1924 | paddr += PAGE_SIZE; |
| 1925 | start += PAGE_SIZE; |
| 1926 | } |
| 1927 | address += offset; |
| 1928 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1929 | ADD_STATS_COUNTER(alloced_io_mem, size); |
| 1930 | |
FUJITA Tomonori | afa9fdc | 2008-09-20 01:23:30 +0900 | [diff] [blame] | 1931 | if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 1932 | iommu_flush_tlb(&dma_dom->domain); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1933 | dma_dom->need_flush = false; |
Joerg Roedel | 318afd4 | 2009-11-23 18:32:38 +0100 | [diff] [blame] | 1934 | } else if (unlikely(amd_iommu_np_cache)) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1935 | iommu_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1936 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1937 | out: |
| 1938 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1939 | |
| 1940 | out_unmap: |
| 1941 | |
| 1942 | for (--i; i >= 0; --i) { |
| 1943 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1944 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1945 | } |
| 1946 | |
| 1947 | dma_ops_free_addresses(dma_dom, address, pages); |
| 1948 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1949 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1950 | } |
| 1951 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1952 | /* |
| 1953 | * Does the reverse of the __map_single function. Must be called with |
| 1954 | * the domain lock held too |
| 1955 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1956 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1957 | dma_addr_t dma_addr, |
| 1958 | size_t size, |
| 1959 | int dir) |
| 1960 | { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1961 | dma_addr_t flush_addr; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1962 | dma_addr_t i, start; |
| 1963 | unsigned int pages; |
| 1964 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1965 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 1966 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1967 | return; |
| 1968 | |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1969 | flush_addr = dma_addr; |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1970 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1971 | dma_addr &= PAGE_MASK; |
| 1972 | start = dma_addr; |
| 1973 | |
| 1974 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1975 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1976 | start += PAGE_SIZE; |
| 1977 | } |
| 1978 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1979 | SUB_STATS_COUNTER(alloced_io_mem, size); |
| 1980 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1981 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1982 | |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1983 | if (amd_iommu_unmap_flush || dma_dom->need_flush) { |
Joerg Roedel | 04e0463 | 2010-09-23 16:12:48 +0200 | [diff] [blame] | 1984 | iommu_flush_pages(&dma_dom->domain, flush_addr, size); |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1985 | dma_dom->need_flush = false; |
| 1986 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1987 | } |
| 1988 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1989 | /* |
| 1990 | * The exported map_single function for dma_ops. |
| 1991 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1992 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 1993 | unsigned long offset, size_t size, |
| 1994 | enum dma_data_direction dir, |
| 1995 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1996 | { |
| 1997 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1998 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1999 | dma_addr_t addr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2000 | u64 dma_mask; |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2001 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2002 | |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 2003 | INC_STATS_COUNTER(cnt_map_single); |
| 2004 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2005 | domain = get_domain(dev); |
| 2006 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2007 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2008 | else if (IS_ERR(domain)) |
| 2009 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2010 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2011 | dma_mask = *dev->dma_mask; |
| 2012 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2013 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2014 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2015 | addr = __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2016 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2017 | if (addr == DMA_ERROR_CODE) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2018 | goto out; |
| 2019 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2020 | iommu_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2021 | |
| 2022 | out: |
| 2023 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2024 | |
| 2025 | return addr; |
| 2026 | } |
| 2027 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2028 | /* |
| 2029 | * The exported unmap_single function for dma_ops. |
| 2030 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2031 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 2032 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2033 | { |
| 2034 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2035 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2036 | |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 2037 | INC_STATS_COUNTER(cnt_unmap_single); |
| 2038 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2039 | domain = get_domain(dev); |
| 2040 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2041 | return; |
| 2042 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2043 | spin_lock_irqsave(&domain->lock, flags); |
| 2044 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2045 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2046 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2047 | iommu_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 2048 | |
| 2049 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2050 | } |
| 2051 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2052 | /* |
| 2053 | * This is a special map_sg function which is used if we should map a |
| 2054 | * device which is not handled by an AMD IOMMU in the system. |
| 2055 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2056 | static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, |
| 2057 | int nelems, int dir) |
| 2058 | { |
| 2059 | struct scatterlist *s; |
| 2060 | int i; |
| 2061 | |
| 2062 | for_each_sg(sglist, s, nelems, i) { |
| 2063 | s->dma_address = (dma_addr_t)sg_phys(s); |
| 2064 | s->dma_length = s->length; |
| 2065 | } |
| 2066 | |
| 2067 | return nelems; |
| 2068 | } |
| 2069 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2070 | /* |
| 2071 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2072 | * lists). |
| 2073 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2074 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2075 | int nelems, enum dma_data_direction dir, |
| 2076 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2077 | { |
| 2078 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2079 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2080 | int i; |
| 2081 | struct scatterlist *s; |
| 2082 | phys_addr_t paddr; |
| 2083 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2084 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2085 | |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 2086 | INC_STATS_COUNTER(cnt_map_sg); |
| 2087 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2088 | domain = get_domain(dev); |
| 2089 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2090 | return map_sg_no_iommu(dev, sglist, nelems, dir); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2091 | else if (IS_ERR(domain)) |
| 2092 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2093 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2094 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2095 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2096 | spin_lock_irqsave(&domain->lock, flags); |
| 2097 | |
| 2098 | for_each_sg(sglist, s, nelems, i) { |
| 2099 | paddr = sg_phys(s); |
| 2100 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2101 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2102 | paddr, s->length, dir, false, |
| 2103 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2104 | |
| 2105 | if (s->dma_address) { |
| 2106 | s->dma_length = s->length; |
| 2107 | mapped_elems++; |
| 2108 | } else |
| 2109 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2110 | } |
| 2111 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2112 | iommu_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2113 | |
| 2114 | out: |
| 2115 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2116 | |
| 2117 | return mapped_elems; |
| 2118 | unmap: |
| 2119 | for_each_sg(sglist, s, mapped_elems, i) { |
| 2120 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2121 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2122 | s->dma_length, dir); |
| 2123 | s->dma_address = s->dma_length = 0; |
| 2124 | } |
| 2125 | |
| 2126 | mapped_elems = 0; |
| 2127 | |
| 2128 | goto out; |
| 2129 | } |
| 2130 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2131 | /* |
| 2132 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 2133 | * lists). |
| 2134 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2135 | static void unmap_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2136 | int nelems, enum dma_data_direction dir, |
| 2137 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2138 | { |
| 2139 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2140 | struct protection_domain *domain; |
| 2141 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2142 | int i; |
| 2143 | |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 2144 | INC_STATS_COUNTER(cnt_unmap_sg); |
| 2145 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2146 | domain = get_domain(dev); |
| 2147 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2148 | return; |
| 2149 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2150 | spin_lock_irqsave(&domain->lock, flags); |
| 2151 | |
| 2152 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2153 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2154 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2155 | s->dma_address = s->dma_length = 0; |
| 2156 | } |
| 2157 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2158 | iommu_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 2159 | |
| 2160 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2161 | } |
| 2162 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2163 | /* |
| 2164 | * The exported alloc_coherent function for dma_ops. |
| 2165 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2166 | static void *alloc_coherent(struct device *dev, size_t size, |
| 2167 | dma_addr_t *dma_addr, gfp_t flag) |
| 2168 | { |
| 2169 | unsigned long flags; |
| 2170 | void *virt_addr; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2171 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2172 | phys_addr_t paddr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2173 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2174 | |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 2175 | INC_STATS_COUNTER(cnt_alloc_coherent); |
| 2176 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2177 | domain = get_domain(dev); |
| 2178 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2179 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2180 | *dma_addr = __pa(virt_addr); |
| 2181 | return virt_addr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2182 | } else if (IS_ERR(domain)) |
| 2183 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2184 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2185 | dma_mask = dev->coherent_dma_mask; |
| 2186 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 2187 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2188 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2189 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2190 | if (!virt_addr) |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2191 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2192 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2193 | paddr = virt_to_phys(virt_addr); |
| 2194 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2195 | if (!dma_mask) |
| 2196 | dma_mask = *dev->dma_mask; |
| 2197 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2198 | spin_lock_irqsave(&domain->lock, flags); |
| 2199 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2200 | *dma_addr = __map_single(dev, domain->priv, paddr, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2201 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2202 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2203 | if (*dma_addr == DMA_ERROR_CODE) { |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2204 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2205 | goto out_free; |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2206 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2207 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2208 | iommu_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2209 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2210 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2211 | |
| 2212 | return virt_addr; |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2213 | |
| 2214 | out_free: |
| 2215 | |
| 2216 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2217 | |
| 2218 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2219 | } |
| 2220 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2221 | /* |
| 2222 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2223 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2224 | static void free_coherent(struct device *dev, size_t size, |
| 2225 | void *virt_addr, dma_addr_t dma_addr) |
| 2226 | { |
| 2227 | unsigned long flags; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2228 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2229 | |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 2230 | INC_STATS_COUNTER(cnt_free_coherent); |
| 2231 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame] | 2232 | domain = get_domain(dev); |
| 2233 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2234 | goto free_mem; |
| 2235 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2236 | spin_lock_irqsave(&domain->lock, flags); |
| 2237 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2238 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2239 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2240 | iommu_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2241 | |
| 2242 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2243 | |
| 2244 | free_mem: |
| 2245 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2246 | } |
| 2247 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2248 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2249 | * This function is called by the DMA layer to find out if we can handle a |
| 2250 | * particular device. It is part of the dma_ops. |
| 2251 | */ |
| 2252 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2253 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2254 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2255 | } |
| 2256 | |
| 2257 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2258 | * The function for pre-allocating protection domains. |
| 2259 | * |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2260 | * If the driver core informs the DMA layer if a driver grabs a device |
| 2261 | * we don't need to preallocate the protection domains anymore. |
| 2262 | * For now we have to. |
| 2263 | */ |
Jaswinder Singh Rajput | 0e93dd8 | 2008-12-29 21:45:22 +0530 | [diff] [blame] | 2264 | static void prealloc_protection_domains(void) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2265 | { |
| 2266 | struct pci_dev *dev = NULL; |
| 2267 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2268 | u16 devid; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2269 | |
Chris Wright | d18c69d | 2010-04-02 18:27:55 -0700 | [diff] [blame] | 2270 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2271 | |
| 2272 | /* Do we handle this device? */ |
| 2273 | if (!check_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2274 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2275 | |
| 2276 | /* Is there already any domain for it? */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2277 | if (domain_for_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2278 | continue; |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2279 | |
| 2280 | devid = get_device_id(&dev->dev); |
| 2281 | |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2282 | dma_dom = dma_ops_domain_alloc(); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2283 | if (!dma_dom) |
| 2284 | continue; |
| 2285 | init_unity_mappings_for_device(dma_dom, devid); |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2286 | dma_dom->target_dev = devid; |
| 2287 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2288 | attach_device(&dev->dev, &dma_dom->domain); |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2289 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2290 | list_add_tail(&dma_dom->list, &iommu_pd_list); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2291 | } |
| 2292 | } |
| 2293 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2294 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2295 | .alloc_coherent = alloc_coherent, |
| 2296 | .free_coherent = free_coherent, |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2297 | .map_page = map_page, |
| 2298 | .unmap_page = unmap_page, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2299 | .map_sg = map_sg, |
| 2300 | .unmap_sg = unmap_sg, |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2301 | .dma_supported = amd_iommu_dma_supported, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2302 | }; |
| 2303 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2304 | /* |
| 2305 | * The function which clues the AMD IOMMU driver into dma_ops. |
| 2306 | */ |
Joerg Roedel | f532509 | 2010-01-22 17:44:35 +0100 | [diff] [blame] | 2307 | |
| 2308 | void __init amd_iommu_init_api(void) |
| 2309 | { |
| 2310 | register_iommu(&amd_iommu_ops); |
| 2311 | } |
| 2312 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2313 | int __init amd_iommu_init_dma_ops(void) |
| 2314 | { |
| 2315 | struct amd_iommu *iommu; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2316 | int ret; |
| 2317 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2318 | /* |
| 2319 | * first allocate a default protection domain for every IOMMU we |
| 2320 | * found in the system. Devices not assigned to any other |
| 2321 | * protection domain will be assigned to the default one. |
| 2322 | */ |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2323 | for_each_iommu(iommu) { |
Joerg Roedel | 87a64d5 | 2009-11-24 17:26:43 +0100 | [diff] [blame] | 2324 | iommu->default_dom = dma_ops_domain_alloc(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2325 | if (iommu->default_dom == NULL) |
| 2326 | return -ENOMEM; |
Joerg Roedel | e2dc14a | 2008-12-10 18:48:59 +0100 | [diff] [blame] | 2327 | iommu->default_dom->domain.flags |= PD_DEFAULT_MASK; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2328 | ret = iommu_init_unity_mappings(iommu); |
| 2329 | if (ret) |
| 2330 | goto free_domains; |
| 2331 | } |
| 2332 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2333 | /* |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2334 | * Pre-allocate the protection domains for each device. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2335 | */ |
Joerg Roedel | 8793abe | 2009-11-27 11:40:33 +0100 | [diff] [blame] | 2336 | prealloc_protection_domains(); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2337 | |
| 2338 | iommu_detected = 1; |
FUJITA Tomonori | 75f1cdf | 2009-11-10 19:46:20 +0900 | [diff] [blame] | 2339 | swiotlb = 0; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2340 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2341 | /* Make the driver finally visible to the drivers */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2342 | dma_ops = &amd_iommu_dma_ops; |
| 2343 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 2344 | amd_iommu_stats_init(); |
| 2345 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2346 | return 0; |
| 2347 | |
| 2348 | free_domains: |
| 2349 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2350 | for_each_iommu(iommu) { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2351 | if (iommu->default_dom) |
| 2352 | dma_ops_domain_free(iommu->default_dom); |
| 2353 | } |
| 2354 | |
| 2355 | return ret; |
| 2356 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2357 | |
| 2358 | /***************************************************************************** |
| 2359 | * |
| 2360 | * The following functions belong to the exported interface of AMD IOMMU |
| 2361 | * |
| 2362 | * This interface allows access to lower level functions of the IOMMU |
| 2363 | * like protection domain handling and assignement of devices to domains |
| 2364 | * which is not possible with the dma_ops interface. |
| 2365 | * |
| 2366 | *****************************************************************************/ |
| 2367 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2368 | static void cleanup_domain(struct protection_domain *domain) |
| 2369 | { |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2370 | struct iommu_dev_data *dev_data, *next; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2371 | unsigned long flags; |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2372 | |
| 2373 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2374 | |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2375 | list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) { |
| 2376 | struct device *dev = dev_data->dev; |
| 2377 | |
Chris Wright | 04e856c | 2010-02-17 08:51:20 -0800 | [diff] [blame] | 2378 | __detach_device(dev); |
Joerg Roedel | 492667d | 2009-11-27 13:25:47 +0100 | [diff] [blame] | 2379 | atomic_set(&dev_data->bind, 0); |
| 2380 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2381 | |
| 2382 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2383 | } |
| 2384 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2385 | static void protection_domain_free(struct protection_domain *domain) |
| 2386 | { |
| 2387 | if (!domain) |
| 2388 | return; |
| 2389 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2390 | del_domain_from_list(domain); |
| 2391 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2392 | if (domain->id) |
| 2393 | domain_id_free(domain->id); |
| 2394 | |
| 2395 | kfree(domain); |
| 2396 | } |
| 2397 | |
| 2398 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2399 | { |
| 2400 | struct protection_domain *domain; |
| 2401 | |
| 2402 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 2403 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2404 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2405 | |
| 2406 | spin_lock_init(&domain->lock); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2407 | mutex_init(&domain->api_lock); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2408 | domain->id = domain_id_alloc(); |
| 2409 | if (!domain->id) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2410 | goto out_err; |
Joerg Roedel | 7c392cb | 2009-11-26 11:13:32 +0100 | [diff] [blame] | 2411 | INIT_LIST_HEAD(&domain->dev_list); |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2412 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2413 | add_domain_to_list(domain); |
| 2414 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2415 | return domain; |
| 2416 | |
| 2417 | out_err: |
| 2418 | kfree(domain); |
| 2419 | |
| 2420 | return NULL; |
| 2421 | } |
| 2422 | |
| 2423 | static int amd_iommu_domain_init(struct iommu_domain *dom) |
| 2424 | { |
| 2425 | struct protection_domain *domain; |
| 2426 | |
| 2427 | domain = protection_domain_alloc(); |
| 2428 | if (!domain) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2429 | goto out_free; |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2430 | |
| 2431 | domain->mode = PAGE_MODE_3_LEVEL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2432 | domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 2433 | if (!domain->pt_root) |
| 2434 | goto out_free; |
| 2435 | |
| 2436 | dom->priv = domain; |
| 2437 | |
| 2438 | return 0; |
| 2439 | |
| 2440 | out_free: |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2441 | protection_domain_free(domain); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2442 | |
| 2443 | return -ENOMEM; |
| 2444 | } |
| 2445 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2446 | static void amd_iommu_domain_destroy(struct iommu_domain *dom) |
| 2447 | { |
| 2448 | struct protection_domain *domain = dom->priv; |
| 2449 | |
| 2450 | if (!domain) |
| 2451 | return; |
| 2452 | |
| 2453 | if (domain->dev_cnt > 0) |
| 2454 | cleanup_domain(domain); |
| 2455 | |
| 2456 | BUG_ON(domain->dev_cnt != 0); |
| 2457 | |
| 2458 | free_pagetable(domain); |
| 2459 | |
Joerg Roedel | 8b408fe | 2010-03-08 14:20:07 +0100 | [diff] [blame] | 2460 | protection_domain_free(domain); |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2461 | |
| 2462 | dom->priv = NULL; |
| 2463 | } |
| 2464 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2465 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 2466 | struct device *dev) |
| 2467 | { |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2468 | struct iommu_dev_data *dev_data = dev->archdata.iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2469 | struct amd_iommu *iommu; |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2470 | u16 devid; |
| 2471 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2472 | if (!check_device(dev)) |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2473 | return; |
| 2474 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2475 | devid = get_device_id(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2476 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2477 | if (dev_data->domain != NULL) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2478 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2479 | |
| 2480 | iommu = amd_iommu_rlookup_table[devid]; |
| 2481 | if (!iommu) |
| 2482 | return; |
| 2483 | |
Joerg Roedel | 3fa4365 | 2009-11-26 15:04:38 +0100 | [diff] [blame] | 2484 | iommu_flush_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2485 | iommu_completion_wait(iommu); |
| 2486 | } |
| 2487 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2488 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 2489 | struct device *dev) |
| 2490 | { |
| 2491 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2492 | struct iommu_dev_data *dev_data; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2493 | struct amd_iommu *iommu; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2494 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2495 | u16 devid; |
| 2496 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2497 | if (!check_device(dev)) |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2498 | return -EINVAL; |
| 2499 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2500 | dev_data = dev->archdata.iommu; |
| 2501 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2502 | devid = get_device_id(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2503 | |
| 2504 | iommu = amd_iommu_rlookup_table[devid]; |
| 2505 | if (!iommu) |
| 2506 | return -EINVAL; |
| 2507 | |
Joerg Roedel | 657cbb6 | 2009-11-23 15:26:46 +0100 | [diff] [blame] | 2508 | if (dev_data->domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2509 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2510 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2511 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2512 | |
| 2513 | iommu_completion_wait(iommu); |
| 2514 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2515 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2516 | } |
| 2517 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2518 | static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova, |
| 2519 | phys_addr_t paddr, int gfp_order, int iommu_prot) |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2520 | { |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2521 | unsigned long page_size = 0x1000UL << gfp_order; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2522 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2523 | int prot = 0; |
| 2524 | int ret; |
| 2525 | |
| 2526 | if (iommu_prot & IOMMU_READ) |
| 2527 | prot |= IOMMU_PROT_IR; |
| 2528 | if (iommu_prot & IOMMU_WRITE) |
| 2529 | prot |= IOMMU_PROT_IW; |
| 2530 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2531 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2532 | ret = iommu_map_page(domain, iova, paddr, prot, page_size); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2533 | mutex_unlock(&domain->api_lock); |
| 2534 | |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2535 | return ret; |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2536 | } |
| 2537 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2538 | static int amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, |
| 2539 | int gfp_order) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2540 | { |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2541 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2542 | unsigned long page_size, unmap_size; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2543 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2544 | page_size = 0x1000UL << gfp_order; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2545 | |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2546 | mutex_lock(&domain->api_lock); |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2547 | unmap_size = iommu_unmap_page(domain, iova, page_size); |
Joerg Roedel | 795e74f7 | 2010-05-11 17:40:57 +0200 | [diff] [blame] | 2548 | mutex_unlock(&domain->api_lock); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2549 | |
Joerg Roedel | 601367d | 2009-11-20 16:08:55 +0100 | [diff] [blame] | 2550 | iommu_flush_tlb_pde(domain); |
Joerg Roedel | 5d214fe | 2010-02-08 14:44:49 +0100 | [diff] [blame] | 2551 | |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2552 | return get_order(unmap_size); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2553 | } |
| 2554 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2555 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
| 2556 | unsigned long iova) |
| 2557 | { |
| 2558 | struct protection_domain *domain = dom->priv; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2559 | unsigned long offset_mask; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2560 | phys_addr_t paddr; |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2561 | u64 *pte, __pte; |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2562 | |
Joerg Roedel | 24cd772 | 2010-01-19 17:27:39 +0100 | [diff] [blame] | 2563 | pte = fetch_pte(domain, iova); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2564 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 2565 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2566 | return 0; |
| 2567 | |
Joerg Roedel | f03152b | 2010-01-21 16:15:24 +0100 | [diff] [blame] | 2568 | if (PM_PTE_LEVEL(*pte) == 0) |
| 2569 | offset_mask = PAGE_SIZE - 1; |
| 2570 | else |
| 2571 | offset_mask = PTE_PAGE_SIZE(*pte) - 1; |
| 2572 | |
| 2573 | __pte = *pte & PM_ADDR_MASK; |
| 2574 | paddr = (__pte & ~offset_mask) | (iova & offset_mask); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2575 | |
| 2576 | return paddr; |
| 2577 | } |
| 2578 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2579 | static int amd_iommu_domain_has_cap(struct iommu_domain *domain, |
| 2580 | unsigned long cap) |
| 2581 | { |
Joerg Roedel | 80a506b | 2010-07-27 17:14:24 +0200 | [diff] [blame] | 2582 | switch (cap) { |
| 2583 | case IOMMU_CAP_CACHE_COHERENCY: |
| 2584 | return 1; |
| 2585 | } |
| 2586 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2587 | return 0; |
| 2588 | } |
| 2589 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2590 | static struct iommu_ops amd_iommu_ops = { |
| 2591 | .domain_init = amd_iommu_domain_init, |
| 2592 | .domain_destroy = amd_iommu_domain_destroy, |
| 2593 | .attach_dev = amd_iommu_attach_device, |
| 2594 | .detach_dev = amd_iommu_detach_device, |
Joerg Roedel | 468e236 | 2010-01-21 16:37:36 +0100 | [diff] [blame] | 2595 | .map = amd_iommu_map, |
| 2596 | .unmap = amd_iommu_unmap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2597 | .iova_to_phys = amd_iommu_iova_to_phys, |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2598 | .domain_has_cap = amd_iommu_domain_has_cap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2599 | }; |
| 2600 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2601 | /***************************************************************************** |
| 2602 | * |
| 2603 | * The next functions do a basic initialization of IOMMU for pass through |
| 2604 | * mode |
| 2605 | * |
| 2606 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 2607 | * DMA-API translation. |
| 2608 | * |
| 2609 | *****************************************************************************/ |
| 2610 | |
| 2611 | int __init amd_iommu_init_passthrough(void) |
| 2612 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2613 | struct amd_iommu *iommu; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2614 | struct pci_dev *dev = NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2615 | u16 devid; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2616 | |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 2617 | /* allocate passthrough domain */ |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2618 | pt_domain = protection_domain_alloc(); |
| 2619 | if (!pt_domain) |
| 2620 | return -ENOMEM; |
| 2621 | |
| 2622 | pt_domain->mode |= PAGE_MODE_NONE; |
| 2623 | |
Kulikov Vasiliy | 6c54aab | 2010-07-03 12:03:51 -0400 | [diff] [blame] | 2624 | for_each_pci_dev(dev) { |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2625 | if (!check_device(&dev->dev)) |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2626 | continue; |
| 2627 | |
Joerg Roedel | 98fc5a6 | 2009-11-24 17:19:23 +0100 | [diff] [blame] | 2628 | devid = get_device_id(&dev->dev); |
| 2629 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2630 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2631 | if (!iommu) |
| 2632 | continue; |
| 2633 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2634 | attach_device(&dev->dev, pt_domain); |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2635 | } |
| 2636 | |
| 2637 | pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); |
| 2638 | |
| 2639 | return 0; |
| 2640 | } |