Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 1 | /* |
Joerg Roedel | bf3118c | 2009-11-20 13:39:19 +0100 | [diff] [blame] | 2 | * Copyright (C) 2007-2009 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> |
| 21 | #include <linux/gfp.h> |
| 22 | #include <linux/bitops.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 | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 60 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 61 | struct unity_map_entry *e); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 62 | static struct dma_ops_domain *find_protection_domain(u16 devid); |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 63 | static u64 *alloc_pte(struct protection_domain *domain, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 64 | unsigned long address, int end_lvl, |
| 65 | u64 **pte_page, gfp_t gfp); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 66 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 67 | unsigned long start_page, |
| 68 | unsigned int pages); |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 69 | static void reset_iommu_command_buffer(struct amd_iommu *iommu); |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 70 | static u64 *fetch_pte(struct protection_domain *domain, |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 71 | unsigned long address, int map_size); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 72 | static void update_domain(struct protection_domain *domain); |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 73 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 74 | /**************************************************************************** |
| 75 | * |
| 76 | * Helper functions |
| 77 | * |
| 78 | ****************************************************************************/ |
| 79 | |
| 80 | static inline u16 get_device_id(struct device *dev) |
| 81 | { |
| 82 | struct pci_dev *pdev = to_pci_dev(dev); |
| 83 | |
| 84 | return calc_devid(pdev->bus->number, pdev->devfn); |
| 85 | } |
| 86 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 87 | #ifdef CONFIG_AMD_IOMMU_STATS |
| 88 | |
| 89 | /* |
| 90 | * Initialization code for statistics collection |
| 91 | */ |
| 92 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 93 | DECLARE_STATS_COUNTER(compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 94 | DECLARE_STATS_COUNTER(cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 95 | DECLARE_STATS_COUNTER(cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 96 | DECLARE_STATS_COUNTER(cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 97 | DECLARE_STATS_COUNTER(cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 98 | DECLARE_STATS_COUNTER(cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 99 | DECLARE_STATS_COUNTER(cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 100 | DECLARE_STATS_COUNTER(cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 101 | DECLARE_STATS_COUNTER(domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 102 | DECLARE_STATS_COUNTER(domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 103 | DECLARE_STATS_COUNTER(alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 104 | DECLARE_STATS_COUNTER(total_map_requests); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 105 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 106 | static struct dentry *stats_dir; |
| 107 | static struct dentry *de_isolate; |
| 108 | static struct dentry *de_fflush; |
| 109 | |
| 110 | static void amd_iommu_stats_add(struct __iommu_counter *cnt) |
| 111 | { |
| 112 | if (stats_dir == NULL) |
| 113 | return; |
| 114 | |
| 115 | cnt->dent = debugfs_create_u64(cnt->name, 0444, stats_dir, |
| 116 | &cnt->value); |
| 117 | } |
| 118 | |
| 119 | static void amd_iommu_stats_init(void) |
| 120 | { |
| 121 | stats_dir = debugfs_create_dir("amd-iommu", NULL); |
| 122 | if (stats_dir == NULL) |
| 123 | return; |
| 124 | |
| 125 | de_isolate = debugfs_create_bool("isolation", 0444, stats_dir, |
| 126 | (u32 *)&amd_iommu_isolate); |
| 127 | |
| 128 | de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir, |
| 129 | (u32 *)&amd_iommu_unmap_flush); |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 130 | |
| 131 | amd_iommu_stats_add(&compl_wait); |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 132 | amd_iommu_stats_add(&cnt_map_single); |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 133 | amd_iommu_stats_add(&cnt_unmap_single); |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 134 | amd_iommu_stats_add(&cnt_map_sg); |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 135 | amd_iommu_stats_add(&cnt_unmap_sg); |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 136 | amd_iommu_stats_add(&cnt_alloc_coherent); |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 137 | amd_iommu_stats_add(&cnt_free_coherent); |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 138 | amd_iommu_stats_add(&cross_page); |
Joerg Roedel | f57d98a | 2008-12-12 15:46:29 +0100 | [diff] [blame] | 139 | amd_iommu_stats_add(&domain_flush_single); |
Joerg Roedel | 18811f5 | 2008-12-12 15:48:28 +0100 | [diff] [blame] | 140 | amd_iommu_stats_add(&domain_flush_all); |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 141 | amd_iommu_stats_add(&alloced_io_mem); |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 142 | amd_iommu_stats_add(&total_map_requests); |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | #endif |
| 146 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 147 | /**************************************************************************** |
| 148 | * |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 149 | * Interrupt handling functions |
| 150 | * |
| 151 | ****************************************************************************/ |
| 152 | |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 153 | static void dump_dte_entry(u16 devid) |
| 154 | { |
| 155 | int i; |
| 156 | |
| 157 | for (i = 0; i < 8; ++i) |
| 158 | pr_err("AMD-Vi: DTE[%d]: %08x\n", i, |
| 159 | amd_iommu_dev_table[devid].data[i]); |
| 160 | } |
| 161 | |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 162 | static void dump_command(unsigned long phys_addr) |
| 163 | { |
| 164 | struct iommu_cmd *cmd = phys_to_virt(phys_addr); |
| 165 | int i; |
| 166 | |
| 167 | for (i = 0; i < 4; ++i) |
| 168 | pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); |
| 169 | } |
| 170 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 171 | static void iommu_print_event(struct amd_iommu *iommu, void *__evt) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 172 | { |
| 173 | u32 *event = __evt; |
| 174 | int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; |
| 175 | int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; |
| 176 | int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; |
| 177 | int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; |
| 178 | u64 address = (u64)(((u64)event[3]) << 32) | event[2]; |
| 179 | |
Joerg Roedel | 4c6f40d | 2009-09-01 16:43:58 +0200 | [diff] [blame] | 180 | printk(KERN_ERR "AMD-Vi: Event logged ["); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 181 | |
| 182 | switch (type) { |
| 183 | case EVENT_TYPE_ILL_DEV: |
| 184 | printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " |
| 185 | "address=0x%016llx flags=0x%04x]\n", |
| 186 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 187 | address, flags); |
Joerg Roedel | e3e5987 | 2009-09-03 14:02:10 +0200 | [diff] [blame] | 188 | dump_dte_entry(devid); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 189 | break; |
| 190 | case EVENT_TYPE_IO_FAULT: |
| 191 | printk("IO_PAGE_FAULT device=%02x:%02x.%x " |
| 192 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 193 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 194 | domid, address, flags); |
| 195 | break; |
| 196 | case EVENT_TYPE_DEV_TAB_ERR: |
| 197 | printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 198 | "address=0x%016llx flags=0x%04x]\n", |
| 199 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 200 | address, flags); |
| 201 | break; |
| 202 | case EVENT_TYPE_PAGE_TAB_ERR: |
| 203 | printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " |
| 204 | "domain=0x%04x address=0x%016llx flags=0x%04x]\n", |
| 205 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 206 | domid, address, flags); |
| 207 | break; |
| 208 | case EVENT_TYPE_ILL_CMD: |
| 209 | printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 210 | reset_iommu_command_buffer(iommu); |
Joerg Roedel | 945b4ac | 2009-09-03 14:25:02 +0200 | [diff] [blame] | 211 | dump_command(address); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 212 | break; |
| 213 | case EVENT_TYPE_CMD_HARD_ERR: |
| 214 | printk("COMMAND_HARDWARE_ERROR address=0x%016llx " |
| 215 | "flags=0x%04x]\n", address, flags); |
| 216 | break; |
| 217 | case EVENT_TYPE_IOTLB_INV_TO: |
| 218 | printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " |
| 219 | "address=0x%016llx]\n", |
| 220 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 221 | address); |
| 222 | break; |
| 223 | case EVENT_TYPE_INV_DEV_REQ: |
| 224 | printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " |
| 225 | "address=0x%016llx flags=0x%04x]\n", |
| 226 | PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), |
| 227 | address, flags); |
| 228 | break; |
| 229 | default: |
| 230 | printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | static void iommu_poll_events(struct amd_iommu *iommu) |
| 235 | { |
| 236 | u32 head, tail; |
| 237 | unsigned long flags; |
| 238 | |
| 239 | spin_lock_irqsave(&iommu->lock, flags); |
| 240 | |
| 241 | head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 242 | tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); |
| 243 | |
| 244 | while (head != tail) { |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 245 | iommu_print_event(iommu, iommu->evt_buf + head); |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 246 | head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; |
| 247 | } |
| 248 | |
| 249 | writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); |
| 250 | |
| 251 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 252 | } |
| 253 | |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 254 | irqreturn_t amd_iommu_int_handler(int irq, void *data) |
| 255 | { |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 256 | struct amd_iommu *iommu; |
| 257 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 258 | for_each_iommu(iommu) |
Joerg Roedel | 90008ee | 2008-09-09 16:41:05 +0200 | [diff] [blame] | 259 | iommu_poll_events(iommu); |
| 260 | |
| 261 | return IRQ_HANDLED; |
Joerg Roedel | a80dc3e | 2008-09-11 16:51:41 +0200 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /**************************************************************************** |
| 265 | * |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 266 | * IOMMU command queuing functions |
| 267 | * |
| 268 | ****************************************************************************/ |
| 269 | |
| 270 | /* |
| 271 | * Writes the command to the IOMMUs command buffer and informs the |
| 272 | * hardware about the new command. Must be called with iommu->lock held. |
| 273 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 274 | 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] | 275 | { |
| 276 | u32 tail, head; |
| 277 | u8 *target; |
| 278 | |
| 279 | tail = readl(iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
Jiri Kosina | 8a7c5ef | 2008-08-19 02:13:55 +0200 | [diff] [blame] | 280 | target = iommu->cmd_buf + tail; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 281 | memcpy_toio(target, cmd, sizeof(*cmd)); |
| 282 | tail = (tail + sizeof(*cmd)) % iommu->cmd_buf_size; |
| 283 | head = readl(iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); |
| 284 | if (tail == head) |
| 285 | return -ENOMEM; |
| 286 | writel(tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 291 | /* |
| 292 | * General queuing function for commands. Takes iommu->lock and calls |
| 293 | * __iommu_queue_command(). |
| 294 | */ |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 295 | 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] | 296 | { |
| 297 | unsigned long flags; |
| 298 | int ret; |
| 299 | |
| 300 | spin_lock_irqsave(&iommu->lock, flags); |
| 301 | ret = __iommu_queue_command(iommu, cmd); |
Joerg Roedel | 09ee17e | 2008-12-03 12:19:27 +0100 | [diff] [blame] | 302 | if (!ret) |
Joerg Roedel | 0cfd7aa | 2008-12-10 19:58:00 +0100 | [diff] [blame] | 303 | iommu->need_sync = true; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 304 | spin_unlock_irqrestore(&iommu->lock, flags); |
| 305 | |
| 306 | return ret; |
| 307 | } |
| 308 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 309 | /* |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 310 | * This function waits until an IOMMU has completed a completion |
| 311 | * wait command |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 312 | */ |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 313 | static void __iommu_wait_for_completion(struct amd_iommu *iommu) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 314 | { |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 315 | int ready = 0; |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 316 | unsigned status = 0; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 317 | unsigned long i = 0; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 318 | |
Joerg Roedel | da49f6d | 2008-12-12 14:59:58 +0100 | [diff] [blame] | 319 | INC_STATS_COUNTER(compl_wait); |
| 320 | |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 321 | while (!ready && (i < EXIT_LOOP_COUNT)) { |
| 322 | ++i; |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 323 | /* wait for the bit to become one */ |
| 324 | status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 325 | ready = status & MMIO_STATUS_COM_WAIT_INT_MASK; |
Joerg Roedel | 136f78a | 2008-07-11 17:14:27 +0200 | [diff] [blame] | 326 | } |
| 327 | |
Joerg Roedel | 519c31b | 2008-08-14 19:55:15 +0200 | [diff] [blame] | 328 | /* set bit back to zero */ |
| 329 | status &= ~MMIO_STATUS_COM_WAIT_INT_MASK; |
| 330 | writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET); |
| 331 | |
Joerg Roedel | 6a1eddd | 2009-09-03 15:15:10 +0200 | [diff] [blame] | 332 | if (unlikely(i == EXIT_LOOP_COUNT)) { |
| 333 | spin_unlock(&iommu->lock); |
| 334 | reset_iommu_command_buffer(iommu); |
| 335 | spin_lock(&iommu->lock); |
| 336 | } |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | /* |
| 340 | * This function queues a completion wait command into the command |
| 341 | * buffer of an IOMMU |
| 342 | */ |
| 343 | static int __iommu_completion_wait(struct amd_iommu *iommu) |
| 344 | { |
| 345 | struct iommu_cmd cmd; |
| 346 | |
| 347 | memset(&cmd, 0, sizeof(cmd)); |
| 348 | cmd.data[0] = CMD_COMPL_WAIT_INT_MASK; |
| 349 | CMD_SET_TYPE(&cmd, CMD_COMPL_WAIT); |
| 350 | |
| 351 | return __iommu_queue_command(iommu, &cmd); |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * This function is called whenever we need to ensure that the IOMMU has |
| 356 | * completed execution of all commands we sent. It sends a |
| 357 | * COMPLETION_WAIT command and waits for it to finish. The IOMMU informs |
| 358 | * us about that by writing a value to a physical address we pass with |
| 359 | * the command. |
| 360 | */ |
| 361 | static int iommu_completion_wait(struct amd_iommu *iommu) |
| 362 | { |
| 363 | int ret = 0; |
| 364 | unsigned long flags; |
| 365 | |
| 366 | spin_lock_irqsave(&iommu->lock, flags); |
| 367 | |
| 368 | if (!iommu->need_sync) |
| 369 | goto out; |
| 370 | |
| 371 | ret = __iommu_completion_wait(iommu); |
| 372 | |
Joerg Roedel | 0cfd7aa | 2008-12-10 19:58:00 +0100 | [diff] [blame] | 373 | iommu->need_sync = false; |
Joerg Roedel | 8d20196 | 2008-12-02 20:34:41 +0100 | [diff] [blame] | 374 | |
| 375 | if (ret) |
| 376 | goto out; |
| 377 | |
| 378 | __iommu_wait_for_completion(iommu); |
Joerg Roedel | 84df817 | 2008-12-17 16:36:44 +0100 | [diff] [blame] | 379 | |
Joerg Roedel | 7e4f88d | 2008-09-17 14:19:15 +0200 | [diff] [blame] | 380 | out: |
| 381 | spin_unlock_irqrestore(&iommu->lock, flags); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 386 | static void iommu_flush_complete(struct protection_domain *domain) |
| 387 | { |
| 388 | int i; |
| 389 | |
| 390 | for (i = 0; i < amd_iommus_present; ++i) { |
| 391 | if (!domain->dev_iommu[i]) |
| 392 | continue; |
| 393 | |
| 394 | /* |
| 395 | * Devices of this domain are behind this IOMMU |
| 396 | * We need to wait for completion of all commands. |
| 397 | */ |
| 398 | iommu_completion_wait(amd_iommus[i]); |
| 399 | } |
| 400 | } |
| 401 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 402 | /* |
| 403 | * Command send function for invalidating a device table entry |
| 404 | */ |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 405 | static int iommu_queue_inv_dev_entry(struct amd_iommu *iommu, u16 devid) |
| 406 | { |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 407 | struct iommu_cmd cmd; |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 408 | int ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 409 | |
| 410 | BUG_ON(iommu == NULL); |
| 411 | |
| 412 | memset(&cmd, 0, sizeof(cmd)); |
| 413 | CMD_SET_TYPE(&cmd, CMD_INV_DEV_ENTRY); |
| 414 | cmd.data[0] = devid; |
| 415 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 416 | ret = iommu_queue_command(iommu, &cmd); |
| 417 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 418 | return ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 419 | } |
| 420 | |
Joerg Roedel | 237b6f3 | 2008-12-02 20:54:37 +0100 | [diff] [blame] | 421 | static void __iommu_build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, |
| 422 | u16 domid, int pde, int s) |
| 423 | { |
| 424 | memset(cmd, 0, sizeof(*cmd)); |
| 425 | address &= PAGE_MASK; |
| 426 | CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES); |
| 427 | cmd->data[1] |= domid; |
| 428 | cmd->data[2] = lower_32_bits(address); |
| 429 | cmd->data[3] = upper_32_bits(address); |
| 430 | if (s) /* size bit - we flush more than one 4kb page */ |
| 431 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK; |
| 432 | if (pde) /* PDE bit - we wan't flush everything not only the PTEs */ |
| 433 | cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK; |
| 434 | } |
| 435 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 436 | /* |
| 437 | * Generic command send function for invalidaing TLB entries |
| 438 | */ |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 439 | static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu, |
| 440 | u64 address, u16 domid, int pde, int s) |
| 441 | { |
Joerg Roedel | d644953 | 2008-07-11 17:14:28 +0200 | [diff] [blame] | 442 | struct iommu_cmd cmd; |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 443 | int ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 444 | |
Joerg Roedel | 237b6f3 | 2008-12-02 20:54:37 +0100 | [diff] [blame] | 445 | __iommu_build_inv_iommu_pages(&cmd, address, domid, pde, s); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 446 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 447 | ret = iommu_queue_command(iommu, &cmd); |
| 448 | |
Joerg Roedel | ee2fa74 | 2008-09-17 13:47:25 +0200 | [diff] [blame] | 449 | return ret; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 450 | } |
| 451 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 452 | /* |
| 453 | * TLB invalidation function which is called from the mapping functions. |
| 454 | * It invalidates a single PTE if the range to flush is within a single |
| 455 | * page. Otherwise it flushes the whole TLB of the IOMMU. |
| 456 | */ |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 457 | static void __iommu_flush_pages(struct protection_domain *domain, |
| 458 | u64 address, size_t size, int pde) |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 459 | { |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 460 | int s = 0, i; |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 461 | unsigned long pages = iommu_num_pages(address, size, PAGE_SIZE); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 462 | |
| 463 | address &= PAGE_MASK; |
| 464 | |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 465 | if (pages > 1) { |
| 466 | /* |
| 467 | * If we have to flush more than one page, flush all |
| 468 | * TLB entries for this domain |
| 469 | */ |
| 470 | address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 471 | s = 1; |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 472 | } |
| 473 | |
Joerg Roedel | 999ba41 | 2008-07-03 19:35:08 +0200 | [diff] [blame] | 474 | |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 475 | for (i = 0; i < amd_iommus_present; ++i) { |
| 476 | if (!domain->dev_iommu[i]) |
| 477 | continue; |
| 478 | |
| 479 | /* |
| 480 | * Devices of this domain are behind this IOMMU |
| 481 | * We need a TLB flush |
| 482 | */ |
| 483 | iommu_queue_inv_iommu_pages(amd_iommus[i], address, |
| 484 | domain->id, pde, s); |
| 485 | } |
| 486 | |
| 487 | return; |
| 488 | } |
| 489 | |
| 490 | static void iommu_flush_pages(struct protection_domain *domain, |
| 491 | u64 address, size_t size) |
| 492 | { |
| 493 | __iommu_flush_pages(domain, address, size, 0); |
Joerg Roedel | a19ae1e | 2008-06-26 21:27:55 +0200 | [diff] [blame] | 494 | } |
Joerg Roedel | b6c0271 | 2008-06-26 21:27:53 +0200 | [diff] [blame] | 495 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 496 | /* Flush the whole IO/TLB for a given protection domain */ |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 497 | static void iommu_flush_tlb(struct protection_domain *domain) |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 498 | { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 499 | __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 500 | } |
| 501 | |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 502 | /* Flush the whole IO/TLB for a given protection domain - including PDE */ |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 503 | static void iommu_flush_tlb_pde(struct protection_domain *domain) |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 504 | { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 505 | __iommu_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1); |
Chris Wright | 42a49f9 | 2009-06-15 15:42:00 +0200 | [diff] [blame] | 506 | } |
| 507 | |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 508 | /* |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 509 | * This function flushes all domains that have devices on the given IOMMU |
Joerg Roedel | 43f4960 | 2008-12-02 21:01:12 +0100 | [diff] [blame] | 510 | */ |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 511 | static void flush_all_domains_on_iommu(struct amd_iommu *iommu) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 512 | { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 513 | u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS; |
| 514 | struct protection_domain *domain; |
| 515 | unsigned long flags; |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 516 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 517 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 518 | |
| 519 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
| 520 | if (domain->dev_iommu[iommu->index] == 0) |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 521 | continue; |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 522 | |
| 523 | spin_lock(&domain->lock); |
| 524 | iommu_queue_inv_iommu_pages(iommu, address, domain->id, 1, 1); |
| 525 | iommu_flush_complete(domain); |
| 526 | spin_unlock(&domain->lock); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 527 | } |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 528 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 529 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 530 | } |
| 531 | |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 532 | /* |
| 533 | * This function uses heavy locking and may disable irqs for some time. But |
| 534 | * this is no issue because it is only called during resume. |
| 535 | */ |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 536 | void amd_iommu_flush_all_domains(void) |
| 537 | { |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 538 | struct protection_domain *domain; |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 539 | unsigned long flags; |
| 540 | |
| 541 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
Joerg Roedel | e394d72 | 2009-09-03 15:28:33 +0200 | [diff] [blame] | 542 | |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 543 | list_for_each_entry(domain, &amd_iommu_pd_list, list) { |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 544 | spin_lock(&domain->lock); |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 545 | iommu_flush_tlb_pde(domain); |
| 546 | iommu_flush_complete(domain); |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 547 | spin_unlock(&domain->lock); |
Joerg Roedel | e330666 | 2009-11-20 16:48:58 +0100 | [diff] [blame] | 548 | } |
Joerg Roedel | 09b4280 | 2009-11-20 17:02:44 +0100 | [diff] [blame] | 549 | |
| 550 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
Joerg Roedel | bfd1be1 | 2009-05-05 15:33:57 +0200 | [diff] [blame] | 551 | } |
| 552 | |
Joerg Roedel | d586d78 | 2009-09-03 15:39:23 +0200 | [diff] [blame] | 553 | static void flush_all_devices_for_iommu(struct amd_iommu *iommu) |
| 554 | { |
| 555 | int i; |
| 556 | |
| 557 | for (i = 0; i <= amd_iommu_last_bdf; ++i) { |
| 558 | if (iommu != amd_iommu_rlookup_table[i]) |
| 559 | continue; |
| 560 | |
| 561 | iommu_queue_inv_dev_entry(iommu, i); |
| 562 | iommu_completion_wait(iommu); |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 563 | } |
| 564 | } |
| 565 | |
Joerg Roedel | 6a0dbcb | 2009-09-02 15:41:59 +0200 | [diff] [blame] | 566 | static void flush_devices_by_domain(struct protection_domain *domain) |
Joerg Roedel | 7d7a110 | 2009-05-05 15:48:10 +0200 | [diff] [blame] | 567 | { |
| 568 | struct amd_iommu *iommu; |
| 569 | int i; |
| 570 | |
| 571 | for (i = 0; i <= amd_iommu_last_bdf; ++i) { |
Joerg Roedel | 6a0dbcb | 2009-09-02 15:41:59 +0200 | [diff] [blame] | 572 | if ((domain == NULL && amd_iommu_pd_table[i] == NULL) || |
| 573 | (amd_iommu_pd_table[i] != domain)) |
Joerg Roedel | 7d7a110 | 2009-05-05 15:48:10 +0200 | [diff] [blame] | 574 | continue; |
| 575 | |
| 576 | iommu = amd_iommu_rlookup_table[i]; |
| 577 | if (!iommu) |
| 578 | continue; |
| 579 | |
| 580 | iommu_queue_inv_dev_entry(iommu, i); |
| 581 | iommu_completion_wait(iommu); |
| 582 | } |
| 583 | } |
| 584 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 585 | static void reset_iommu_command_buffer(struct amd_iommu *iommu) |
| 586 | { |
| 587 | pr_err("AMD-Vi: Resetting IOMMU command buffer\n"); |
| 588 | |
Joerg Roedel | b26e81b | 2009-09-03 15:08:09 +0200 | [diff] [blame] | 589 | if (iommu->reset_in_progress) |
| 590 | panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n"); |
| 591 | |
| 592 | iommu->reset_in_progress = true; |
| 593 | |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 594 | amd_iommu_reset_cmd_buffer(iommu); |
| 595 | flush_all_devices_for_iommu(iommu); |
| 596 | flush_all_domains_on_iommu(iommu); |
Joerg Roedel | b26e81b | 2009-09-03 15:08:09 +0200 | [diff] [blame] | 597 | |
| 598 | iommu->reset_in_progress = false; |
Joerg Roedel | a345b23 | 2009-09-03 15:01:43 +0200 | [diff] [blame] | 599 | } |
| 600 | |
Joerg Roedel | 6a0dbcb | 2009-09-02 15:41:59 +0200 | [diff] [blame] | 601 | void amd_iommu_flush_all_devices(void) |
| 602 | { |
| 603 | flush_devices_by_domain(NULL); |
| 604 | } |
| 605 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 606 | /**************************************************************************** |
| 607 | * |
| 608 | * The functions below are used the create the page table mappings for |
| 609 | * unity mapped regions. |
| 610 | * |
| 611 | ****************************************************************************/ |
| 612 | |
| 613 | /* |
| 614 | * Generic mapping functions. It maps a physical address into a DMA |
| 615 | * address space. It allocates the page table pages if necessary. |
| 616 | * In the future it can be extended to a generic mapping function |
| 617 | * supporting all features of AMD IOMMU page tables like level skipping |
| 618 | * and full 64 bit address spaces. |
| 619 | */ |
Joerg Roedel | 38e817f | 2008-12-02 17:27:52 +0100 | [diff] [blame] | 620 | static int iommu_map_page(struct protection_domain *dom, |
| 621 | unsigned long bus_addr, |
| 622 | unsigned long phys_addr, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 623 | int prot, |
| 624 | int map_size) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 625 | { |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 626 | u64 __pte, *pte; |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 627 | |
| 628 | bus_addr = PAGE_ALIGN(bus_addr); |
Joerg Roedel | bb9d4ff | 2008-12-04 15:59:48 +0100 | [diff] [blame] | 629 | phys_addr = PAGE_ALIGN(phys_addr); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 630 | |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 631 | BUG_ON(!PM_ALIGNED(map_size, bus_addr)); |
| 632 | BUG_ON(!PM_ALIGNED(map_size, phys_addr)); |
| 633 | |
Joerg Roedel | bad1cac | 2009-09-02 16:52:23 +0200 | [diff] [blame] | 634 | if (!(prot & IOMMU_PROT_MASK)) |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 635 | return -EINVAL; |
| 636 | |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 637 | pte = alloc_pte(dom, bus_addr, map_size, NULL, GFP_KERNEL); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 638 | |
| 639 | if (IOMMU_PTE_PRESENT(*pte)) |
| 640 | return -EBUSY; |
| 641 | |
| 642 | __pte = phys_addr | IOMMU_PTE_P; |
| 643 | if (prot & IOMMU_PROT_IR) |
| 644 | __pte |= IOMMU_PTE_IR; |
| 645 | if (prot & IOMMU_PROT_IW) |
| 646 | __pte |= IOMMU_PTE_IW; |
| 647 | |
| 648 | *pte = __pte; |
| 649 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 650 | update_domain(dom); |
| 651 | |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 652 | return 0; |
| 653 | } |
| 654 | |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 655 | static void iommu_unmap_page(struct protection_domain *dom, |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 656 | unsigned long bus_addr, int map_size) |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 657 | { |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 658 | u64 *pte = fetch_pte(dom, bus_addr, map_size); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 659 | |
Joerg Roedel | 38a76ee | 2009-09-02 17:02:47 +0200 | [diff] [blame] | 660 | if (pte) |
| 661 | *pte = 0; |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 662 | } |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 663 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 664 | /* |
| 665 | * This function checks if a specific unity mapping entry is needed for |
| 666 | * this specific IOMMU. |
| 667 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 668 | static int iommu_for_unity_map(struct amd_iommu *iommu, |
| 669 | struct unity_map_entry *entry) |
| 670 | { |
| 671 | u16 bdf, i; |
| 672 | |
| 673 | for (i = entry->devid_start; i <= entry->devid_end; ++i) { |
| 674 | bdf = amd_iommu_alias_table[i]; |
| 675 | if (amd_iommu_rlookup_table[bdf] == iommu) |
| 676 | return 1; |
| 677 | } |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 682 | /* |
| 683 | * Init the unity mappings for a specific IOMMU in the system |
| 684 | * |
| 685 | * Basically iterates over all unity mapping entries and applies them to |
| 686 | * the default domain DMA of that IOMMU if necessary. |
| 687 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 688 | static int iommu_init_unity_mappings(struct amd_iommu *iommu) |
| 689 | { |
| 690 | struct unity_map_entry *entry; |
| 691 | int ret; |
| 692 | |
| 693 | list_for_each_entry(entry, &amd_iommu_unity_map, list) { |
| 694 | if (!iommu_for_unity_map(iommu, entry)) |
| 695 | continue; |
| 696 | ret = dma_ops_unity_map(iommu->default_dom, entry); |
| 697 | if (ret) |
| 698 | return ret; |
| 699 | } |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 704 | /* |
| 705 | * This function actually applies the mapping to the page table of the |
| 706 | * dma_ops domain. |
| 707 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 708 | static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, |
| 709 | struct unity_map_entry *e) |
| 710 | { |
| 711 | u64 addr; |
| 712 | int ret; |
| 713 | |
| 714 | for (addr = e->address_start; addr < e->address_end; |
| 715 | addr += PAGE_SIZE) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 716 | ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, |
| 717 | PM_MAP_4k); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 718 | if (ret) |
| 719 | return ret; |
| 720 | /* |
| 721 | * if unity mapping is in aperture range mark the page |
| 722 | * as allocated in the aperture |
| 723 | */ |
| 724 | if (addr < dma_dom->aperture_size) |
Joerg Roedel | c323956 | 2009-05-12 10:56:44 +0200 | [diff] [blame] | 725 | __set_bit(addr >> PAGE_SHIFT, |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 726 | dma_dom->aperture[0]->bitmap); |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | return 0; |
| 730 | } |
| 731 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 732 | /* |
| 733 | * Inits the unity mappings required for a specific device |
| 734 | */ |
Joerg Roedel | bd0e521 | 2008-06-26 21:27:56 +0200 | [diff] [blame] | 735 | static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, |
| 736 | u16 devid) |
| 737 | { |
| 738 | struct unity_map_entry *e; |
| 739 | int ret; |
| 740 | |
| 741 | list_for_each_entry(e, &amd_iommu_unity_map, list) { |
| 742 | if (!(devid >= e->devid_start && devid <= e->devid_end)) |
| 743 | continue; |
| 744 | ret = dma_ops_unity_map(dma_dom, e); |
| 745 | if (ret) |
| 746 | return ret; |
| 747 | } |
| 748 | |
| 749 | return 0; |
| 750 | } |
| 751 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 752 | /**************************************************************************** |
| 753 | * |
| 754 | * The next functions belong to the address allocator for the dma_ops |
| 755 | * interface functions. They work like the allocators in the other IOMMU |
| 756 | * drivers. Its basically a bitmap which marks the allocated pages in |
| 757 | * the aperture. Maybe it could be enhanced in the future to a more |
| 758 | * efficient allocator. |
| 759 | * |
| 760 | ****************************************************************************/ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 761 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 762 | /* |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 763 | * The address allocator core functions. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 764 | * |
| 765 | * called with domain->lock held |
| 766 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 767 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 768 | /* |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 769 | * This function checks if there is a PTE for a given dma address. If |
| 770 | * there is one, it returns the pointer to it. |
| 771 | */ |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 772 | static u64 *fetch_pte(struct protection_domain *domain, |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 773 | unsigned long address, int map_size) |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 774 | { |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 775 | int level; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 776 | u64 *pte; |
| 777 | |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 778 | level = domain->mode - 1; |
| 779 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 780 | |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 781 | while (level > map_size) { |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 782 | if (!IOMMU_PTE_PRESENT(*pte)) |
| 783 | return NULL; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 784 | |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 785 | level -= 1; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 786 | |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 787 | pte = IOMMU_PTE_PAGE(*pte); |
| 788 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 789 | |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 790 | if ((PM_PTE_LEVEL(*pte) == 0) && level != map_size) { |
| 791 | pte = NULL; |
| 792 | break; |
| 793 | } |
Joerg Roedel | 9355a08 | 2009-09-02 14:24:08 +0200 | [diff] [blame] | 794 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 795 | |
| 796 | return pte; |
| 797 | } |
| 798 | |
| 799 | /* |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 800 | * This function is used to add a new aperture range to an existing |
| 801 | * aperture in case of dma_ops domain allocation or address allocation |
| 802 | * failure. |
| 803 | */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 804 | static int alloc_new_range(struct dma_ops_domain *dma_dom, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 805 | bool populate, gfp_t gfp) |
| 806 | { |
| 807 | int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 808 | struct amd_iommu *iommu; |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 809 | int i; |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 810 | |
Joerg Roedel | f5e9705 | 2009-05-22 12:31:53 +0200 | [diff] [blame] | 811 | #ifdef CONFIG_IOMMU_STRESS |
| 812 | populate = false; |
| 813 | #endif |
| 814 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 815 | if (index >= APERTURE_MAX_RANGES) |
| 816 | return -ENOMEM; |
| 817 | |
| 818 | dma_dom->aperture[index] = kzalloc(sizeof(struct aperture_range), gfp); |
| 819 | if (!dma_dom->aperture[index]) |
| 820 | return -ENOMEM; |
| 821 | |
| 822 | dma_dom->aperture[index]->bitmap = (void *)get_zeroed_page(gfp); |
| 823 | if (!dma_dom->aperture[index]->bitmap) |
| 824 | goto out_free; |
| 825 | |
| 826 | dma_dom->aperture[index]->offset = dma_dom->aperture_size; |
| 827 | |
| 828 | if (populate) { |
| 829 | unsigned long address = dma_dom->aperture_size; |
| 830 | int i, num_ptes = APERTURE_RANGE_PAGES / 512; |
| 831 | u64 *pte, *pte_page; |
| 832 | |
| 833 | for (i = 0; i < num_ptes; ++i) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 834 | pte = alloc_pte(&dma_dom->domain, address, PM_MAP_4k, |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 835 | &pte_page, gfp); |
| 836 | if (!pte) |
| 837 | goto out_free; |
| 838 | |
| 839 | dma_dom->aperture[index]->pte_pages[i] = pte_page; |
| 840 | |
| 841 | address += APERTURE_RANGE_SIZE / 64; |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | dma_dom->aperture_size += APERTURE_RANGE_SIZE; |
| 846 | |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 847 | /* Intialize the exclusion range if necessary */ |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 848 | for_each_iommu(iommu) { |
| 849 | if (iommu->exclusion_start && |
| 850 | iommu->exclusion_start >= dma_dom->aperture[index]->offset |
| 851 | && iommu->exclusion_start < dma_dom->aperture_size) { |
| 852 | unsigned long startpage; |
| 853 | int pages = iommu_num_pages(iommu->exclusion_start, |
| 854 | iommu->exclusion_length, |
| 855 | PAGE_SIZE); |
| 856 | startpage = iommu->exclusion_start >> PAGE_SHIFT; |
| 857 | dma_ops_reserve_addresses(dma_dom, startpage, pages); |
| 858 | } |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | /* |
| 862 | * Check for areas already mapped as present in the new aperture |
| 863 | * range and mark those pages as reserved in the allocator. Such |
| 864 | * mappings may already exist as a result of requested unity |
| 865 | * mappings for devices. |
| 866 | */ |
| 867 | for (i = dma_dom->aperture[index]->offset; |
| 868 | i < dma_dom->aperture_size; |
| 869 | i += PAGE_SIZE) { |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 870 | u64 *pte = fetch_pte(&dma_dom->domain, i, PM_MAP_4k); |
Joerg Roedel | 00cd122 | 2009-05-19 09:52:40 +0200 | [diff] [blame] | 871 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
| 872 | continue; |
| 873 | |
| 874 | dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1); |
| 875 | } |
| 876 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 877 | update_domain(&dma_dom->domain); |
| 878 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 879 | return 0; |
| 880 | |
| 881 | out_free: |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 882 | update_domain(&dma_dom->domain); |
| 883 | |
Joerg Roedel | 9cabe89 | 2009-05-18 16:38:55 +0200 | [diff] [blame] | 884 | free_page((unsigned long)dma_dom->aperture[index]->bitmap); |
| 885 | |
| 886 | kfree(dma_dom->aperture[index]); |
| 887 | dma_dom->aperture[index] = NULL; |
| 888 | |
| 889 | return -ENOMEM; |
| 890 | } |
| 891 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 892 | static unsigned long dma_ops_area_alloc(struct device *dev, |
| 893 | struct dma_ops_domain *dom, |
| 894 | unsigned int pages, |
| 895 | unsigned long align_mask, |
| 896 | u64 dma_mask, |
| 897 | unsigned long start) |
| 898 | { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 899 | unsigned long next_bit = dom->next_address % APERTURE_RANGE_SIZE; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 900 | int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; |
| 901 | int i = start >> APERTURE_RANGE_SHIFT; |
| 902 | unsigned long boundary_size; |
| 903 | unsigned long address = -1; |
| 904 | unsigned long limit; |
| 905 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 906 | next_bit >>= PAGE_SHIFT; |
| 907 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 908 | boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
| 909 | PAGE_SIZE) >> PAGE_SHIFT; |
| 910 | |
| 911 | for (;i < max_index; ++i) { |
| 912 | unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; |
| 913 | |
| 914 | if (dom->aperture[i]->offset >= dma_mask) |
| 915 | break; |
| 916 | |
| 917 | limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, |
| 918 | dma_mask >> PAGE_SHIFT); |
| 919 | |
| 920 | address = iommu_area_alloc(dom->aperture[i]->bitmap, |
| 921 | limit, next_bit, pages, 0, |
| 922 | boundary_size, align_mask); |
| 923 | if (address != -1) { |
| 924 | address = dom->aperture[i]->offset + |
| 925 | (address << PAGE_SHIFT); |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 926 | dom->next_address = address + (pages << PAGE_SHIFT); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 927 | break; |
| 928 | } |
| 929 | |
| 930 | next_bit = 0; |
| 931 | } |
| 932 | |
| 933 | return address; |
| 934 | } |
| 935 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 936 | static unsigned long dma_ops_alloc_addresses(struct device *dev, |
| 937 | struct dma_ops_domain *dom, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 938 | unsigned int pages, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 939 | unsigned long align_mask, |
| 940 | u64 dma_mask) |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 941 | { |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 942 | unsigned long address; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 943 | |
Joerg Roedel | fe16f08 | 2009-05-22 12:27:53 +0200 | [diff] [blame] | 944 | #ifdef CONFIG_IOMMU_STRESS |
| 945 | dom->next_address = 0; |
| 946 | dom->need_flush = true; |
| 947 | #endif |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 948 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 949 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 950 | dma_mask, dom->next_address); |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 951 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 952 | if (address == -1) { |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 953 | dom->next_address = 0; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 954 | address = dma_ops_area_alloc(dev, dom, pages, align_mask, |
| 955 | dma_mask, 0); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 956 | dom->need_flush = true; |
| 957 | } |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 958 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 959 | if (unlikely(address == -1)) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 960 | address = DMA_ERROR_CODE; |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 961 | |
| 962 | WARN_ON((address + (PAGE_SIZE*pages)) > dom->aperture_size); |
| 963 | |
| 964 | return address; |
| 965 | } |
| 966 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 967 | /* |
| 968 | * The address free function. |
| 969 | * |
| 970 | * called with domain->lock held |
| 971 | */ |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 972 | static void dma_ops_free_addresses(struct dma_ops_domain *dom, |
| 973 | unsigned long address, |
| 974 | unsigned int pages) |
| 975 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 976 | unsigned i = address >> APERTURE_RANGE_SHIFT; |
| 977 | struct aperture_range *range = dom->aperture[i]; |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 978 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 979 | BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL); |
| 980 | |
Joerg Roedel | 47bccd6 | 2009-05-22 12:40:54 +0200 | [diff] [blame] | 981 | #ifdef CONFIG_IOMMU_STRESS |
| 982 | if (i < 4) |
| 983 | return; |
| 984 | #endif |
| 985 | |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 986 | if (address >= dom->next_address) |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 987 | dom->need_flush = true; |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 988 | |
| 989 | address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 990 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 991 | iommu_area_free(range->bitmap, address, pages); |
| 992 | |
Joerg Roedel | d308644 | 2008-06-26 21:27:57 +0200 | [diff] [blame] | 993 | } |
| 994 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 995 | /**************************************************************************** |
| 996 | * |
| 997 | * The next functions belong to the domain allocation. A domain is |
| 998 | * allocated for every IOMMU as the default domain. If device isolation |
| 999 | * is enabled, every device get its own domain. The most important thing |
| 1000 | * about domains is the page table mapping the DMA address space they |
| 1001 | * contain. |
| 1002 | * |
| 1003 | ****************************************************************************/ |
| 1004 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1005 | /* |
| 1006 | * This function adds a protection domain to the global protection domain list |
| 1007 | */ |
| 1008 | static void add_domain_to_list(struct protection_domain *domain) |
| 1009 | { |
| 1010 | unsigned long flags; |
| 1011 | |
| 1012 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1013 | list_add(&domain->list, &amd_iommu_pd_list); |
| 1014 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1015 | } |
| 1016 | |
| 1017 | /* |
| 1018 | * This function removes a protection domain to the global |
| 1019 | * protection domain list |
| 1020 | */ |
| 1021 | static void del_domain_from_list(struct protection_domain *domain) |
| 1022 | { |
| 1023 | unsigned long flags; |
| 1024 | |
| 1025 | spin_lock_irqsave(&amd_iommu_pd_lock, flags); |
| 1026 | list_del(&domain->list); |
| 1027 | spin_unlock_irqrestore(&amd_iommu_pd_lock, flags); |
| 1028 | } |
| 1029 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1030 | static u16 domain_id_alloc(void) |
| 1031 | { |
| 1032 | unsigned long flags; |
| 1033 | int id; |
| 1034 | |
| 1035 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1036 | id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID); |
| 1037 | BUG_ON(id == 0); |
| 1038 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1039 | __set_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1040 | else |
| 1041 | id = 0; |
| 1042 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1043 | |
| 1044 | return id; |
| 1045 | } |
| 1046 | |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1047 | static void domain_id_free(int id) |
| 1048 | { |
| 1049 | unsigned long flags; |
| 1050 | |
| 1051 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1052 | if (id > 0 && id < MAX_DOMAIN_ID) |
| 1053 | __clear_bit(id, amd_iommu_pd_alloc_bitmap); |
| 1054 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1055 | } |
Joerg Roedel | a2acfb7 | 2008-12-02 18:28:53 +0100 | [diff] [blame] | 1056 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1057 | /* |
| 1058 | * Used to reserve address ranges in the aperture (e.g. for exclusion |
| 1059 | * ranges. |
| 1060 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1061 | static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, |
| 1062 | unsigned long start_page, |
| 1063 | unsigned int pages) |
| 1064 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1065 | unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1066 | |
| 1067 | if (start_page + pages > last_page) |
| 1068 | pages = last_page - start_page; |
| 1069 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1070 | for (i = start_page; i < start_page + pages; ++i) { |
| 1071 | int index = i / APERTURE_RANGE_PAGES; |
| 1072 | int page = i % APERTURE_RANGE_PAGES; |
| 1073 | __set_bit(page, dom->aperture[index]->bitmap); |
| 1074 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1075 | } |
| 1076 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1077 | static void free_pagetable(struct protection_domain *domain) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1078 | { |
| 1079 | int i, j; |
| 1080 | u64 *p1, *p2, *p3; |
| 1081 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1082 | p1 = domain->pt_root; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1083 | |
| 1084 | if (!p1) |
| 1085 | return; |
| 1086 | |
| 1087 | for (i = 0; i < 512; ++i) { |
| 1088 | if (!IOMMU_PTE_PRESENT(p1[i])) |
| 1089 | continue; |
| 1090 | |
| 1091 | p2 = IOMMU_PTE_PAGE(p1[i]); |
Joerg Roedel | 3cc3d84 | 2008-12-04 16:44:31 +0100 | [diff] [blame] | 1092 | for (j = 0; j < 512; ++j) { |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1093 | if (!IOMMU_PTE_PRESENT(p2[j])) |
| 1094 | continue; |
| 1095 | p3 = IOMMU_PTE_PAGE(p2[j]); |
| 1096 | free_page((unsigned long)p3); |
| 1097 | } |
| 1098 | |
| 1099 | free_page((unsigned long)p2); |
| 1100 | } |
| 1101 | |
| 1102 | free_page((unsigned long)p1); |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1103 | |
| 1104 | domain->pt_root = NULL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1105 | } |
| 1106 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1107 | /* |
| 1108 | * Free a domain, only used if something went wrong in the |
| 1109 | * allocation path and we need to free an already allocated page table |
| 1110 | */ |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1111 | static void dma_ops_domain_free(struct dma_ops_domain *dom) |
| 1112 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1113 | int i; |
| 1114 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1115 | if (!dom) |
| 1116 | return; |
| 1117 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1118 | del_domain_from_list(&dom->domain); |
| 1119 | |
Joerg Roedel | 86db2e5 | 2008-12-02 18:20:21 +0100 | [diff] [blame] | 1120 | free_pagetable(&dom->domain); |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1121 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1122 | for (i = 0; i < APERTURE_MAX_RANGES; ++i) { |
| 1123 | if (!dom->aperture[i]) |
| 1124 | continue; |
| 1125 | free_page((unsigned long)dom->aperture[i]->bitmap); |
| 1126 | kfree(dom->aperture[i]); |
| 1127 | } |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1128 | |
| 1129 | kfree(dom); |
| 1130 | } |
| 1131 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1132 | /* |
| 1133 | * Allocates a new protection domain usable for the dma_ops functions. |
| 1134 | * It also intializes the page table and the address allocator data |
| 1135 | * structures required for the dma_ops interface |
| 1136 | */ |
Joerg Roedel | d9cfed9 | 2009-05-19 12:16:29 +0200 | [diff] [blame] | 1137 | static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1138 | { |
| 1139 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1140 | |
| 1141 | dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL); |
| 1142 | if (!dma_dom) |
| 1143 | return NULL; |
| 1144 | |
| 1145 | spin_lock_init(&dma_dom->domain.lock); |
| 1146 | |
| 1147 | dma_dom->domain.id = domain_id_alloc(); |
| 1148 | if (dma_dom->domain.id == 0) |
| 1149 | goto free_dma_dom; |
Joerg Roedel | 8f7a017 | 2009-09-02 16:55:24 +0200 | [diff] [blame] | 1150 | dma_dom->domain.mode = PAGE_MODE_2_LEVEL; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1151 | dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
Joerg Roedel | 9fdb19d | 2008-12-02 17:46:25 +0100 | [diff] [blame] | 1152 | dma_dom->domain.flags = PD_DMA_OPS_MASK; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1153 | dma_dom->domain.priv = dma_dom; |
| 1154 | if (!dma_dom->domain.pt_root) |
| 1155 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1156 | |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1157 | dma_dom->need_flush = false; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1158 | dma_dom->target_dev = 0xffff; |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1159 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 1160 | add_domain_to_list(&dma_dom->domain); |
| 1161 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1162 | if (alloc_new_range(dma_dom, true, GFP_KERNEL)) |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1163 | goto free_dma_dom; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1164 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1165 | /* |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1166 | * mark the first page as allocated so we never return 0 as |
| 1167 | * a valid dma-address. So we can use 0 as error value |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1168 | */ |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1169 | dma_dom->aperture[0]->bitmap[0] = 1; |
Joerg Roedel | 803b8cb | 2009-05-18 15:32:48 +0200 | [diff] [blame] | 1170 | dma_dom->next_address = 0; |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1171 | |
Joerg Roedel | ec487d1 | 2008-06-26 21:27:58 +0200 | [diff] [blame] | 1172 | |
| 1173 | return dma_dom; |
| 1174 | |
| 1175 | free_dma_dom: |
| 1176 | dma_ops_domain_free(dma_dom); |
| 1177 | |
| 1178 | return NULL; |
| 1179 | } |
| 1180 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1181 | /* |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1182 | * little helper function to check whether a given protection domain is a |
| 1183 | * dma_ops domain |
| 1184 | */ |
| 1185 | static bool dma_ops_domain(struct protection_domain *domain) |
| 1186 | { |
| 1187 | return domain->flags & PD_DMA_OPS_MASK; |
| 1188 | } |
| 1189 | |
Joerg Roedel | 407d733 | 2009-09-02 16:07:00 +0200 | [diff] [blame] | 1190 | static void set_dte_entry(u16 devid, struct protection_domain *domain) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1191 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1192 | struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1193 | u64 pte_root = virt_to_phys(domain->pt_root); |
Joerg Roedel | 863c74e | 2008-12-02 17:56:36 +0100 | [diff] [blame] | 1194 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1195 | BUG_ON(amd_iommu_pd_table[devid] != NULL); |
| 1196 | |
Joerg Roedel | 38ddf41 | 2008-09-11 10:38:32 +0200 | [diff] [blame] | 1197 | pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) |
| 1198 | << DEV_ENTRY_MODE_SHIFT; |
| 1199 | 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] | 1200 | |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1201 | amd_iommu_dev_table[devid].data[2] = domain->id; |
Joerg Roedel | aa879ff | 2009-08-31 16:01:48 +0200 | [diff] [blame] | 1202 | amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); |
| 1203 | amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1204 | |
| 1205 | amd_iommu_pd_table[devid] = domain; |
Joerg Roedel | eba6ac6 | 2009-09-01 12:07:08 +0200 | [diff] [blame] | 1206 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1207 | /* Do reference counting */ |
| 1208 | domain->dev_iommu[iommu->index] += 1; |
| 1209 | domain->dev_cnt += 1; |
Joerg Roedel | eba6ac6 | 2009-09-01 12:07:08 +0200 | [diff] [blame] | 1210 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1211 | /* Flush the changes DTE entry */ |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1212 | iommu_queue_inv_dev_entry(iommu, devid); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1213 | } |
| 1214 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1215 | static void clear_dte_entry(u16 devid) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1216 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1217 | struct protection_domain *domain = amd_iommu_pd_table[devid]; |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1218 | struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; |
| 1219 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1220 | BUG_ON(domain == NULL); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1221 | |
| 1222 | /* remove domain from the lookup table */ |
| 1223 | amd_iommu_pd_table[devid] = NULL; |
| 1224 | |
| 1225 | /* remove entry from the device table seen by the hardware */ |
| 1226 | amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV; |
| 1227 | amd_iommu_dev_table[devid].data[1] = 0; |
| 1228 | amd_iommu_dev_table[devid].data[2] = 0; |
| 1229 | |
Joerg Roedel | c5cca14 | 2009-10-09 18:31:20 +0200 | [diff] [blame] | 1230 | amd_iommu_apply_erratum_63(devid); |
| 1231 | |
Joerg Roedel | c459611 | 2009-11-20 14:57:32 +0100 | [diff] [blame] | 1232 | /* decrease reference counters */ |
| 1233 | domain->dev_iommu[iommu->index] -= 1; |
| 1234 | domain->dev_cnt -= 1; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1235 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1236 | iommu_queue_inv_dev_entry(iommu, devid); |
| 1237 | } |
| 1238 | |
| 1239 | /* |
| 1240 | * If a device is not yet associated with a domain, this function does |
| 1241 | * assigns it visible for the hardware |
| 1242 | */ |
| 1243 | static int __attach_device(struct device *dev, |
| 1244 | struct protection_domain *domain) |
| 1245 | { |
| 1246 | u16 devid = get_device_id(dev); |
| 1247 | u16 alias = amd_iommu_alias_table[devid]; |
| 1248 | |
| 1249 | /* lock domain */ |
| 1250 | spin_lock(&domain->lock); |
| 1251 | |
| 1252 | /* Some sanity checks */ |
| 1253 | if (amd_iommu_pd_table[alias] != NULL && |
| 1254 | amd_iommu_pd_table[alias] != domain) |
| 1255 | return -EBUSY; |
| 1256 | |
| 1257 | if (amd_iommu_pd_table[devid] != NULL && |
| 1258 | amd_iommu_pd_table[devid] != domain) |
| 1259 | return -EBUSY; |
| 1260 | |
| 1261 | /* Do real assignment */ |
| 1262 | if (alias != devid && |
| 1263 | amd_iommu_pd_table[alias] == NULL) |
| 1264 | set_dte_entry(alias, domain); |
| 1265 | |
| 1266 | if (amd_iommu_pd_table[devid] == NULL) |
| 1267 | set_dte_entry(devid, domain); |
| 1268 | |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1269 | /* ready */ |
| 1270 | spin_unlock(&domain->lock); |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1271 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1272 | return 0; |
| 1273 | } |
| 1274 | |
| 1275 | /* |
| 1276 | * If a device is not yet associated with a domain, this function does |
| 1277 | * assigns it visible for the hardware |
| 1278 | */ |
| 1279 | static int attach_device(struct device *dev, |
| 1280 | struct protection_domain *domain) |
| 1281 | { |
| 1282 | unsigned long flags; |
| 1283 | int ret; |
| 1284 | |
| 1285 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1286 | ret = __attach_device(dev, domain); |
| 1287 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1288 | |
| 1289 | /* |
| 1290 | * We might boot into a crash-kernel here. The crashed kernel |
| 1291 | * left the caches in the IOMMU dirty. So we have to flush |
| 1292 | * here to evict all dirty stuff. |
| 1293 | */ |
| 1294 | iommu_flush_tlb_pde(domain); |
| 1295 | |
| 1296 | return ret; |
| 1297 | } |
| 1298 | |
| 1299 | /* |
| 1300 | * Removes a device from a protection domain (unlocked) |
| 1301 | */ |
| 1302 | static void __detach_device(struct device *dev) |
| 1303 | { |
| 1304 | u16 devid = get_device_id(dev); |
| 1305 | struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; |
| 1306 | |
| 1307 | BUG_ON(!iommu); |
| 1308 | |
| 1309 | clear_dte_entry(devid); |
| 1310 | |
Joerg Roedel | 21129f7 | 2009-09-01 11:59:42 +0200 | [diff] [blame] | 1311 | /* |
| 1312 | * If we run in passthrough mode the device must be assigned to the |
| 1313 | * passthrough domain if it is detached from any other domain |
| 1314 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1315 | if (iommu_pass_through) |
| 1316 | __attach_device(dev, pt_domain); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1317 | } |
| 1318 | |
| 1319 | /* |
| 1320 | * Removes a device from a protection domain (with devtable_lock held) |
| 1321 | */ |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1322 | static void detach_device(struct device *dev) |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1323 | { |
| 1324 | unsigned long flags; |
| 1325 | |
| 1326 | /* lock device table */ |
| 1327 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1328 | __detach_device(dev); |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1329 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1330 | } |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1331 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1332 | /* |
| 1333 | * Find out the protection domain structure for a given PCI device. This |
| 1334 | * will give us the pointer to the page table root for example. |
| 1335 | */ |
| 1336 | static struct protection_domain *domain_for_device(struct device *dev) |
| 1337 | { |
| 1338 | struct protection_domain *dom; |
| 1339 | unsigned long flags; |
| 1340 | u16 devid, alias; |
| 1341 | |
| 1342 | devid = get_device_id(dev); |
| 1343 | alias = amd_iommu_alias_table[devid]; |
| 1344 | |
| 1345 | read_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 1346 | dom = amd_iommu_pd_table[devid]; |
| 1347 | if (dom == NULL && |
| 1348 | amd_iommu_pd_table[alias] != NULL) { |
| 1349 | __attach_device(dev, amd_iommu_pd_table[alias]); |
| 1350 | dom = amd_iommu_pd_table[devid]; |
| 1351 | } |
| 1352 | |
| 1353 | read_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 1354 | |
| 1355 | return dom; |
| 1356 | } |
| 1357 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1358 | static int device_change_notifier(struct notifier_block *nb, |
| 1359 | unsigned long action, void *data) |
| 1360 | { |
| 1361 | struct device *dev = data; |
| 1362 | struct pci_dev *pdev = to_pci_dev(dev); |
| 1363 | u16 devid = calc_devid(pdev->bus->number, pdev->devfn); |
| 1364 | struct protection_domain *domain; |
| 1365 | struct dma_ops_domain *dma_domain; |
| 1366 | struct amd_iommu *iommu; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1367 | unsigned long flags; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1368 | |
| 1369 | if (devid > amd_iommu_last_bdf) |
| 1370 | goto out; |
| 1371 | |
| 1372 | devid = amd_iommu_alias_table[devid]; |
| 1373 | |
| 1374 | iommu = amd_iommu_rlookup_table[devid]; |
| 1375 | if (iommu == NULL) |
| 1376 | goto out; |
| 1377 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1378 | domain = domain_for_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1379 | |
| 1380 | if (domain && !dma_ops_domain(domain)) |
| 1381 | WARN_ONCE(1, "AMD IOMMU WARNING: device %s already bound " |
| 1382 | "to a non-dma-ops domain\n", dev_name(dev)); |
| 1383 | |
| 1384 | switch (action) { |
Chris Wright | c1eee67 | 2009-05-21 00:56:58 -0700 | [diff] [blame] | 1385 | case BUS_NOTIFY_UNBOUND_DRIVER: |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1386 | if (!domain) |
| 1387 | goto out; |
Joerg Roedel | a1ca331 | 2009-09-01 12:22:22 +0200 | [diff] [blame] | 1388 | if (iommu_pass_through) |
| 1389 | break; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1390 | detach_device(dev); |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1391 | break; |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1392 | case BUS_NOTIFY_ADD_DEVICE: |
| 1393 | /* allocate a protection domain if a device is added */ |
| 1394 | dma_domain = find_protection_domain(devid); |
| 1395 | if (dma_domain) |
| 1396 | goto out; |
Joerg Roedel | d9cfed9 | 2009-05-19 12:16:29 +0200 | [diff] [blame] | 1397 | dma_domain = dma_ops_domain_alloc(iommu); |
Joerg Roedel | 1ac4cbb | 2008-12-10 19:33:26 +0100 | [diff] [blame] | 1398 | if (!dma_domain) |
| 1399 | goto out; |
| 1400 | dma_domain->target_dev = devid; |
| 1401 | |
| 1402 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 1403 | list_add_tail(&dma_domain->list, &iommu_pd_list); |
| 1404 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 1405 | |
| 1406 | break; |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1407 | default: |
| 1408 | goto out; |
| 1409 | } |
| 1410 | |
| 1411 | iommu_queue_inv_dev_entry(iommu, devid); |
| 1412 | iommu_completion_wait(iommu); |
| 1413 | |
| 1414 | out: |
| 1415 | return 0; |
| 1416 | } |
| 1417 | |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 1418 | static struct notifier_block device_nb = { |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 1419 | .notifier_call = device_change_notifier, |
| 1420 | }; |
Joerg Roedel | 355bf55 | 2008-12-08 12:02:41 +0100 | [diff] [blame] | 1421 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1422 | /***************************************************************************** |
| 1423 | * |
| 1424 | * The next functions belong to the dma_ops mapping/unmapping code. |
| 1425 | * |
| 1426 | *****************************************************************************/ |
| 1427 | |
| 1428 | /* |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1429 | * This function checks if the driver got a valid device from the caller to |
| 1430 | * avoid dereferencing invalid pointers. |
| 1431 | */ |
| 1432 | static bool check_device(struct device *dev) |
| 1433 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 1434 | u16 bdf; |
| 1435 | struct pci_dev *pcidev; |
| 1436 | |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1437 | if (!dev || !dev->dma_mask) |
| 1438 | return false; |
| 1439 | |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 1440 | /* No device or no PCI device */ |
| 1441 | if (!dev || dev->bus != &pci_bus_type) |
| 1442 | return false; |
| 1443 | |
| 1444 | pcidev = to_pci_dev(dev); |
| 1445 | |
| 1446 | bdf = calc_devid(pcidev->bus->number, pcidev->devfn); |
| 1447 | |
| 1448 | /* Out of our scope? */ |
| 1449 | if (bdf > amd_iommu_last_bdf) |
| 1450 | return false; |
| 1451 | |
| 1452 | if (amd_iommu_rlookup_table[bdf] == NULL) |
| 1453 | return false; |
| 1454 | |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1455 | return true; |
| 1456 | } |
| 1457 | |
| 1458 | /* |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1459 | * In this function the list of preallocated protection domains is traversed to |
| 1460 | * find the domain for a specific device |
| 1461 | */ |
| 1462 | static struct dma_ops_domain *find_protection_domain(u16 devid) |
| 1463 | { |
| 1464 | struct dma_ops_domain *entry, *ret = NULL; |
| 1465 | unsigned long flags; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1466 | u16 alias = amd_iommu_alias_table[devid]; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1467 | |
| 1468 | if (list_empty(&iommu_pd_list)) |
| 1469 | return NULL; |
| 1470 | |
| 1471 | spin_lock_irqsave(&iommu_pd_list_lock, flags); |
| 1472 | |
| 1473 | list_for_each_entry(entry, &iommu_pd_list, list) { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1474 | if (entry->target_dev == devid || |
| 1475 | entry->target_dev == alias) { |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1476 | ret = entry; |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 1477 | break; |
| 1478 | } |
| 1479 | } |
| 1480 | |
| 1481 | spin_unlock_irqrestore(&iommu_pd_list_lock, flags); |
| 1482 | |
| 1483 | return ret; |
| 1484 | } |
| 1485 | |
| 1486 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1487 | * In the dma_ops path we only have the struct device. This function |
| 1488 | * finds the corresponding IOMMU, the protection domain and the |
| 1489 | * requestor id for a given device. |
| 1490 | * If the device is not yet associated with a domain this is also done |
| 1491 | * in this function. |
| 1492 | */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1493 | static struct protection_domain *get_domain(struct device *dev) |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1494 | { |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1495 | struct protection_domain *domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1496 | struct dma_ops_domain *dma_dom; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1497 | u16 devid = get_device_id(dev); |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1498 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1499 | if (!check_device(dev)) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1500 | return ERR_PTR(-EINVAL); |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1501 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1502 | domain = domain_for_device(dev); |
| 1503 | if (domain != NULL && !dma_ops_domain(domain)) |
| 1504 | return ERR_PTR(-EBUSY); |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1505 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1506 | if (domain != NULL) |
| 1507 | return domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1508 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1509 | /* Device not bount yet - bind it */ |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1510 | dma_dom = find_protection_domain(devid); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1511 | if (!dma_dom) |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1512 | dma_dom = amd_iommu_rlookup_table[devid]->default_dom; |
| 1513 | attach_device(dev, &dma_dom->domain); |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 1514 | DUMP_printk("Using protection domain %d for device %s\n", |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1515 | dma_dom->domain.id, dev_name(dev)); |
Joerg Roedel | f91ba19 | 2008-11-25 12:56:12 +0100 | [diff] [blame] | 1516 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1517 | return &dma_dom->domain; |
Joerg Roedel | b20ac0d | 2008-06-26 21:27:59 +0200 | [diff] [blame] | 1518 | } |
| 1519 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1520 | static void update_device_table(struct protection_domain *domain) |
| 1521 | { |
Joerg Roedel | 2b681fa | 2009-09-03 17:14:57 +0200 | [diff] [blame] | 1522 | unsigned long flags; |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1523 | int i; |
| 1524 | |
| 1525 | for (i = 0; i <= amd_iommu_last_bdf; ++i) { |
| 1526 | if (amd_iommu_pd_table[i] != domain) |
| 1527 | continue; |
Joerg Roedel | 2b681fa | 2009-09-03 17:14:57 +0200 | [diff] [blame] | 1528 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1529 | set_dte_entry(i, domain); |
Joerg Roedel | 2b681fa | 2009-09-03 17:14:57 +0200 | [diff] [blame] | 1530 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | static void update_domain(struct protection_domain *domain) |
| 1535 | { |
| 1536 | if (!domain->updated) |
| 1537 | return; |
| 1538 | |
| 1539 | update_device_table(domain); |
| 1540 | flush_devices_by_domain(domain); |
Joerg Roedel | 601367d | 2009-11-20 16:08:55 +0100 | [diff] [blame] | 1541 | iommu_flush_tlb_pde(domain); |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1542 | |
| 1543 | domain->updated = false; |
| 1544 | } |
| 1545 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1546 | /* |
Joerg Roedel | 50020fb | 2009-09-02 15:38:40 +0200 | [diff] [blame] | 1547 | * This function is used to add another level to an IO page table. Adding |
| 1548 | * another level increases the size of the address space by 9 bits to a size up |
| 1549 | * to 64 bits. |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1550 | */ |
Joerg Roedel | 50020fb | 2009-09-02 15:38:40 +0200 | [diff] [blame] | 1551 | static bool increase_address_space(struct protection_domain *domain, |
| 1552 | gfp_t gfp) |
| 1553 | { |
| 1554 | u64 *pte; |
| 1555 | |
| 1556 | if (domain->mode == PAGE_MODE_6_LEVEL) |
| 1557 | /* address space already 64 bit large */ |
| 1558 | return false; |
| 1559 | |
| 1560 | pte = (void *)get_zeroed_page(gfp); |
| 1561 | if (!pte) |
| 1562 | return false; |
| 1563 | |
| 1564 | *pte = PM_LEVEL_PDE(domain->mode, |
| 1565 | virt_to_phys(domain->pt_root)); |
| 1566 | domain->pt_root = pte; |
| 1567 | domain->mode += 1; |
| 1568 | domain->updated = true; |
| 1569 | |
| 1570 | return true; |
| 1571 | } |
| 1572 | |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1573 | static u64 *alloc_pte(struct protection_domain *domain, |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1574 | unsigned long address, |
| 1575 | int end_lvl, |
| 1576 | u64 **pte_page, |
| 1577 | gfp_t gfp) |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1578 | { |
| 1579 | u64 *pte, *page; |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1580 | int level; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1581 | |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1582 | while (address > PM_LEVEL_SIZE(domain->mode)) |
| 1583 | increase_address_space(domain, gfp); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1584 | |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1585 | level = domain->mode - 1; |
| 1586 | pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; |
| 1587 | |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1588 | while (level > end_lvl) { |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1589 | if (!IOMMU_PTE_PRESENT(*pte)) { |
| 1590 | page = (u64 *)get_zeroed_page(gfp); |
| 1591 | if (!page) |
| 1592 | return NULL; |
| 1593 | *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); |
| 1594 | } |
| 1595 | |
| 1596 | level -= 1; |
| 1597 | |
| 1598 | pte = IOMMU_PTE_PAGE(*pte); |
| 1599 | |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1600 | if (pte_page && level == end_lvl) |
Joerg Roedel | 8bc3e12 | 2009-09-02 16:48:40 +0200 | [diff] [blame] | 1601 | *pte_page = pte; |
| 1602 | |
| 1603 | pte = &pte[PM_LEVEL_INDEX(level, address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1604 | } |
| 1605 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1606 | return pte; |
| 1607 | } |
| 1608 | |
| 1609 | /* |
| 1610 | * This function fetches the PTE for a given address in the aperture |
| 1611 | */ |
| 1612 | static u64* dma_ops_get_pte(struct dma_ops_domain *dom, |
| 1613 | unsigned long address) |
| 1614 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1615 | struct aperture_range *aperture; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1616 | u64 *pte, *pte_page; |
| 1617 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1618 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1619 | if (!aperture) |
| 1620 | return NULL; |
| 1621 | |
| 1622 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1623 | if (!pte) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 1624 | pte = alloc_pte(&dom->domain, address, PM_MAP_4k, &pte_page, |
| 1625 | GFP_ATOMIC); |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1626 | aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; |
| 1627 | } else |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1628 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1629 | |
Joerg Roedel | 04bfdd8 | 2009-09-02 16:00:23 +0200 | [diff] [blame] | 1630 | update_domain(&dom->domain); |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1631 | |
| 1632 | return pte; |
| 1633 | } |
| 1634 | |
| 1635 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1636 | * This is the generic map function. It maps one 4kb page at paddr to |
| 1637 | * the given address in the DMA address space for the domain. |
| 1638 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1639 | 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] | 1640 | unsigned long address, |
| 1641 | phys_addr_t paddr, |
| 1642 | int direction) |
| 1643 | { |
| 1644 | u64 *pte, __pte; |
| 1645 | |
| 1646 | WARN_ON(address > dom->aperture_size); |
| 1647 | |
| 1648 | paddr &= PAGE_MASK; |
| 1649 | |
Joerg Roedel | 8bda309 | 2009-05-12 12:02:46 +0200 | [diff] [blame] | 1650 | pte = dma_ops_get_pte(dom, address); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1651 | if (!pte) |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1652 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1653 | |
| 1654 | __pte = paddr | IOMMU_PTE_P | IOMMU_PTE_FC; |
| 1655 | |
| 1656 | if (direction == DMA_TO_DEVICE) |
| 1657 | __pte |= IOMMU_PTE_IR; |
| 1658 | else if (direction == DMA_FROM_DEVICE) |
| 1659 | __pte |= IOMMU_PTE_IW; |
| 1660 | else if (direction == DMA_BIDIRECTIONAL) |
| 1661 | __pte |= IOMMU_PTE_IR | IOMMU_PTE_IW; |
| 1662 | |
| 1663 | WARN_ON(*pte); |
| 1664 | |
| 1665 | *pte = __pte; |
| 1666 | |
| 1667 | return (dma_addr_t)address; |
| 1668 | } |
| 1669 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1670 | /* |
| 1671 | * The generic unmapping function for on page in the DMA address space. |
| 1672 | */ |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1673 | static void dma_ops_domain_unmap(struct dma_ops_domain *dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1674 | unsigned long address) |
| 1675 | { |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1676 | struct aperture_range *aperture; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1677 | u64 *pte; |
| 1678 | |
| 1679 | if (address >= dom->aperture_size) |
| 1680 | return; |
| 1681 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1682 | aperture = dom->aperture[APERTURE_RANGE_INDEX(address)]; |
| 1683 | if (!aperture) |
| 1684 | return; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1685 | |
Joerg Roedel | 384de72 | 2009-05-15 12:30:05 +0200 | [diff] [blame] | 1686 | pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; |
| 1687 | if (!pte) |
| 1688 | return; |
| 1689 | |
Joerg Roedel | 8c8c143 | 2009-09-02 17:30:00 +0200 | [diff] [blame] | 1690 | pte += PM_LEVEL_INDEX(0, address); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1691 | |
| 1692 | WARN_ON(!*pte); |
| 1693 | |
| 1694 | *pte = 0ULL; |
| 1695 | } |
| 1696 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1697 | /* |
| 1698 | * This function contains common code for mapping of a physically |
Joerg Roedel | 24f8116 | 2008-12-08 14:25:39 +0100 | [diff] [blame] | 1699 | * contiguous memory region into DMA address space. It is used by all |
| 1700 | * mapping functions provided with this IOMMU driver. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1701 | * Must be called with the domain lock held. |
| 1702 | */ |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1703 | static dma_addr_t __map_single(struct device *dev, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1704 | struct dma_ops_domain *dma_dom, |
| 1705 | phys_addr_t paddr, |
| 1706 | size_t size, |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1707 | int dir, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1708 | bool align, |
| 1709 | u64 dma_mask) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1710 | { |
| 1711 | dma_addr_t offset = paddr & ~PAGE_MASK; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1712 | dma_addr_t address, start, ret; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1713 | unsigned int pages; |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1714 | unsigned long align_mask = 0; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1715 | int i; |
| 1716 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1717 | pages = iommu_num_pages(paddr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1718 | paddr &= PAGE_MASK; |
| 1719 | |
Joerg Roedel | 8ecaf8f | 2008-12-12 16:13:04 +0100 | [diff] [blame] | 1720 | INC_STATS_COUNTER(total_map_requests); |
| 1721 | |
Joerg Roedel | c185897 | 2008-12-12 15:42:39 +0100 | [diff] [blame] | 1722 | if (pages > 1) |
| 1723 | INC_STATS_COUNTER(cross_page); |
| 1724 | |
Joerg Roedel | 6d4f343 | 2008-09-04 19:18:02 +0200 | [diff] [blame] | 1725 | if (align) |
| 1726 | align_mask = (1UL << get_order(size)) - 1; |
| 1727 | |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1728 | retry: |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1729 | address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask, |
| 1730 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1731 | if (unlikely(address == DMA_ERROR_CODE)) { |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1732 | /* |
| 1733 | * setting next_address here will let the address |
| 1734 | * allocator only scan the new allocated range in the |
| 1735 | * first run. This is a small optimization. |
| 1736 | */ |
| 1737 | dma_dom->next_address = dma_dom->aperture_size; |
| 1738 | |
Joerg Roedel | 576175c | 2009-11-23 19:08:46 +0100 | [diff] [blame] | 1739 | if (alloc_new_range(dma_dom, false, GFP_ATOMIC)) |
Joerg Roedel | 11b8388 | 2009-05-19 10:23:15 +0200 | [diff] [blame] | 1740 | goto out; |
| 1741 | |
| 1742 | /* |
| 1743 | * aperture was sucessfully enlarged by 128 MB, try |
| 1744 | * allocation again |
| 1745 | */ |
| 1746 | goto retry; |
| 1747 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1748 | |
| 1749 | start = address; |
| 1750 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1751 | ret = dma_ops_domain_map(dma_dom, start, paddr, dir); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1752 | if (ret == DMA_ERROR_CODE) |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1753 | goto out_unmap; |
| 1754 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1755 | paddr += PAGE_SIZE; |
| 1756 | start += PAGE_SIZE; |
| 1757 | } |
| 1758 | address += offset; |
| 1759 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1760 | ADD_STATS_COUNTER(alloced_io_mem, size); |
| 1761 | |
FUJITA Tomonori | afa9fdc | 2008-09-20 01:23:30 +0900 | [diff] [blame] | 1762 | if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) { |
Joerg Roedel | dcd1e92 | 2009-11-20 15:30:58 +0100 | [diff] [blame] | 1763 | iommu_flush_tlb(&dma_dom->domain); |
Joerg Roedel | 1c65577 | 2008-09-04 18:40:05 +0200 | [diff] [blame] | 1764 | dma_dom->need_flush = false; |
Joerg Roedel | 318afd4 | 2009-11-23 18:32:38 +0100 | [diff] [blame] | 1765 | } else if (unlikely(amd_iommu_np_cache)) |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1766 | iommu_flush_pages(&dma_dom->domain, address, size); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1767 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1768 | out: |
| 1769 | return address; |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1770 | |
| 1771 | out_unmap: |
| 1772 | |
| 1773 | for (--i; i >= 0; --i) { |
| 1774 | start -= PAGE_SIZE; |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1775 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | 53812c1 | 2009-05-12 12:17:38 +0200 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | dma_ops_free_addresses(dma_dom, address, pages); |
| 1779 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1780 | return DMA_ERROR_CODE; |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1781 | } |
| 1782 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1783 | /* |
| 1784 | * Does the reverse of the __map_single function. Must be called with |
| 1785 | * the domain lock held too |
| 1786 | */ |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1787 | static void __unmap_single(struct dma_ops_domain *dma_dom, |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1788 | dma_addr_t dma_addr, |
| 1789 | size_t size, |
| 1790 | int dir) |
| 1791 | { |
| 1792 | dma_addr_t i, start; |
| 1793 | unsigned int pages; |
| 1794 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1795 | if ((dma_addr == DMA_ERROR_CODE) || |
Joerg Roedel | b8d9905 | 2008-12-08 14:40:26 +0100 | [diff] [blame] | 1796 | (dma_addr + size > dma_dom->aperture_size)) |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1797 | return; |
| 1798 | |
Joerg Roedel | e3c449f | 2008-10-15 22:02:11 -0700 | [diff] [blame] | 1799 | pages = iommu_num_pages(dma_addr, size, PAGE_SIZE); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1800 | dma_addr &= PAGE_MASK; |
| 1801 | start = dma_addr; |
| 1802 | |
| 1803 | for (i = 0; i < pages; ++i) { |
Joerg Roedel | 680525e | 2009-11-23 18:44:42 +0100 | [diff] [blame] | 1804 | dma_ops_domain_unmap(dma_dom, start); |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1805 | start += PAGE_SIZE; |
| 1806 | } |
| 1807 | |
Joerg Roedel | 5774f7c | 2008-12-12 15:57:30 +0100 | [diff] [blame] | 1808 | SUB_STATS_COUNTER(alloced_io_mem, size); |
| 1809 | |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1810 | dma_ops_free_addresses(dma_dom, dma_addr, pages); |
Joerg Roedel | 270cab24 | 2008-09-04 15:49:46 +0200 | [diff] [blame] | 1811 | |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1812 | if (amd_iommu_unmap_flush || dma_dom->need_flush) { |
Joerg Roedel | 6de8ad9 | 2009-11-23 18:30:32 +0100 | [diff] [blame] | 1813 | iommu_flush_pages(&dma_dom->domain, dma_addr, size); |
Joerg Roedel | 80be308 | 2008-11-06 14:59:05 +0100 | [diff] [blame] | 1814 | dma_dom->need_flush = false; |
| 1815 | } |
Joerg Roedel | cb76c32 | 2008-06-26 21:28:00 +0200 | [diff] [blame] | 1816 | } |
| 1817 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1818 | /* |
| 1819 | * The exported map_single function for dma_ops. |
| 1820 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1821 | static dma_addr_t map_page(struct device *dev, struct page *page, |
| 1822 | unsigned long offset, size_t size, |
| 1823 | enum dma_data_direction dir, |
| 1824 | struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1825 | { |
| 1826 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1827 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1828 | dma_addr_t addr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1829 | u64 dma_mask; |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1830 | phys_addr_t paddr = page_to_phys(page) + offset; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1831 | |
Joerg Roedel | 0f2a86f | 2008-12-12 15:05:16 +0100 | [diff] [blame] | 1832 | INC_STATS_COUNTER(cnt_map_single); |
| 1833 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1834 | domain = get_domain(dev); |
| 1835 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1836 | return (dma_addr_t)paddr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1837 | else if (IS_ERR(domain)) |
| 1838 | return DMA_ERROR_CODE; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1839 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1840 | dma_mask = *dev->dma_mask; |
| 1841 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1842 | spin_lock_irqsave(&domain->lock, flags); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1843 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1844 | addr = __map_single(dev, domain->priv, paddr, size, dir, false, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1845 | dma_mask); |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 1846 | if (addr == DMA_ERROR_CODE) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1847 | goto out; |
| 1848 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 1849 | iommu_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1850 | |
| 1851 | out: |
| 1852 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1853 | |
| 1854 | return addr; |
| 1855 | } |
| 1856 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1857 | /* |
| 1858 | * The exported unmap_single function for dma_ops. |
| 1859 | */ |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 1860 | static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 1861 | enum dma_data_direction dir, struct dma_attrs *attrs) |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1862 | { |
| 1863 | unsigned long flags; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1864 | struct protection_domain *domain; |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1865 | |
Joerg Roedel | 146a691 | 2008-12-12 15:07:12 +0100 | [diff] [blame] | 1866 | INC_STATS_COUNTER(cnt_unmap_single); |
| 1867 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1868 | domain = get_domain(dev); |
| 1869 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1870 | return; |
| 1871 | |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1872 | spin_lock_irqsave(&domain->lock, flags); |
| 1873 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1874 | __unmap_single(domain->priv, dma_addr, size, dir); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1875 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 1876 | iommu_flush_complete(domain); |
Joerg Roedel | 4da70b9 | 2008-06-26 21:28:01 +0200 | [diff] [blame] | 1877 | |
| 1878 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1879 | } |
| 1880 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1881 | /* |
| 1882 | * This is a special map_sg function which is used if we should map a |
| 1883 | * device which is not handled by an AMD IOMMU in the system. |
| 1884 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1885 | static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, |
| 1886 | int nelems, int dir) |
| 1887 | { |
| 1888 | struct scatterlist *s; |
| 1889 | int i; |
| 1890 | |
| 1891 | for_each_sg(sglist, s, nelems, i) { |
| 1892 | s->dma_address = (dma_addr_t)sg_phys(s); |
| 1893 | s->dma_length = s->length; |
| 1894 | } |
| 1895 | |
| 1896 | return nelems; |
| 1897 | } |
| 1898 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1899 | /* |
| 1900 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 1901 | * lists). |
| 1902 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1903 | static int map_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 1904 | int nelems, enum dma_data_direction dir, |
| 1905 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1906 | { |
| 1907 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1908 | struct protection_domain *domain; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1909 | int i; |
| 1910 | struct scatterlist *s; |
| 1911 | phys_addr_t paddr; |
| 1912 | int mapped_elems = 0; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1913 | u64 dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1914 | |
Joerg Roedel | d03f067a | 2008-12-12 15:09:48 +0100 | [diff] [blame] | 1915 | INC_STATS_COUNTER(cnt_map_sg); |
| 1916 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1917 | domain = get_domain(dev); |
| 1918 | if (PTR_ERR(domain) == -EINVAL) |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 1919 | return map_sg_no_iommu(dev, sglist, nelems, dir); |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1920 | else if (IS_ERR(domain)) |
| 1921 | return 0; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 1922 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1923 | dma_mask = *dev->dma_mask; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1924 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1925 | spin_lock_irqsave(&domain->lock, flags); |
| 1926 | |
| 1927 | for_each_sg(sglist, s, nelems, i) { |
| 1928 | paddr = sg_phys(s); |
| 1929 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1930 | s->dma_address = __map_single(dev, domain->priv, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 1931 | paddr, s->length, dir, false, |
| 1932 | dma_mask); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1933 | |
| 1934 | if (s->dma_address) { |
| 1935 | s->dma_length = s->length; |
| 1936 | mapped_elems++; |
| 1937 | } else |
| 1938 | goto unmap; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1939 | } |
| 1940 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 1941 | iommu_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1942 | |
| 1943 | out: |
| 1944 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1945 | |
| 1946 | return mapped_elems; |
| 1947 | unmap: |
| 1948 | for_each_sg(sglist, s, mapped_elems, i) { |
| 1949 | if (s->dma_address) |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1950 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1951 | s->dma_length, dir); |
| 1952 | s->dma_address = s->dma_length = 0; |
| 1953 | } |
| 1954 | |
| 1955 | mapped_elems = 0; |
| 1956 | |
| 1957 | goto out; |
| 1958 | } |
| 1959 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1960 | /* |
| 1961 | * The exported map_sg function for dma_ops (handles scatter-gather |
| 1962 | * lists). |
| 1963 | */ |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1964 | static void unmap_sg(struct device *dev, struct scatterlist *sglist, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 1965 | int nelems, enum dma_data_direction dir, |
| 1966 | struct dma_attrs *attrs) |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1967 | { |
| 1968 | unsigned long flags; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1969 | struct protection_domain *domain; |
| 1970 | struct scatterlist *s; |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1971 | int i; |
| 1972 | |
Joerg Roedel | 55877a6 | 2008-12-12 15:12:14 +0100 | [diff] [blame] | 1973 | INC_STATS_COUNTER(cnt_unmap_sg); |
| 1974 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 1975 | domain = get_domain(dev); |
| 1976 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 1977 | return; |
| 1978 | |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1979 | spin_lock_irqsave(&domain->lock, flags); |
| 1980 | |
| 1981 | for_each_sg(sglist, s, nelems, i) { |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 1982 | __unmap_single(domain->priv, s->dma_address, |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1983 | s->dma_length, dir); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1984 | s->dma_address = s->dma_length = 0; |
| 1985 | } |
| 1986 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 1987 | iommu_flush_complete(domain); |
Joerg Roedel | 65b050a | 2008-06-26 21:28:02 +0200 | [diff] [blame] | 1988 | |
| 1989 | spin_unlock_irqrestore(&domain->lock, flags); |
| 1990 | } |
| 1991 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 1992 | /* |
| 1993 | * The exported alloc_coherent function for dma_ops. |
| 1994 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 1995 | static void *alloc_coherent(struct device *dev, size_t size, |
| 1996 | dma_addr_t *dma_addr, gfp_t flag) |
| 1997 | { |
| 1998 | unsigned long flags; |
| 1999 | void *virt_addr; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2000 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2001 | phys_addr_t paddr; |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2002 | u64 dma_mask = dev->coherent_dma_mask; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2003 | |
Joerg Roedel | c8f0fb3 | 2008-12-12 15:14:21 +0100 | [diff] [blame] | 2004 | INC_STATS_COUNTER(cnt_alloc_coherent); |
| 2005 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 2006 | domain = get_domain(dev); |
| 2007 | if (PTR_ERR(domain) == -EINVAL) { |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2008 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2009 | *dma_addr = __pa(virt_addr); |
| 2010 | return virt_addr; |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 2011 | } else if (IS_ERR(domain)) |
| 2012 | return NULL; |
Joerg Roedel | dbcc112 | 2008-09-04 15:04:26 +0200 | [diff] [blame] | 2013 | |
Joerg Roedel | f99c0f1 | 2009-11-23 16:52:56 +0100 | [diff] [blame] | 2014 | dma_mask = dev->coherent_dma_mask; |
| 2015 | flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
| 2016 | flag |= __GFP_ZERO; |
FUJITA Tomonori | 13d9fea | 2008-09-10 20:19:40 +0900 | [diff] [blame] | 2017 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2018 | virt_addr = (void *)__get_free_pages(flag, get_order(size)); |
| 2019 | if (!virt_addr) |
Jaswinder Singh Rajput | b25ae67 | 2009-07-01 19:53:14 +0530 | [diff] [blame] | 2020 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2021 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2022 | paddr = virt_to_phys(virt_addr); |
| 2023 | |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2024 | if (!dma_mask) |
| 2025 | dma_mask = *dev->dma_mask; |
| 2026 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2027 | spin_lock_irqsave(&domain->lock, flags); |
| 2028 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2029 | *dma_addr = __map_single(dev, domain->priv, paddr, |
Joerg Roedel | 832a90c | 2008-09-18 15:54:23 +0200 | [diff] [blame] | 2030 | size, DMA_BIDIRECTIONAL, true, dma_mask); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2031 | |
FUJITA Tomonori | 8fd524b | 2009-11-15 21:19:53 +0900 | [diff] [blame] | 2032 | if (*dma_addr == DMA_ERROR_CODE) { |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2033 | spin_unlock_irqrestore(&domain->lock, flags); |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2034 | goto out_free; |
Jiri Slaby | 367d04c | 2009-05-28 09:54:48 +0200 | [diff] [blame] | 2035 | } |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2036 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2037 | iommu_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2038 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2039 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2040 | |
| 2041 | return virt_addr; |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2042 | |
| 2043 | out_free: |
| 2044 | |
| 2045 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2046 | |
| 2047 | return NULL; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2048 | } |
| 2049 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2050 | /* |
| 2051 | * The exported free_coherent function for dma_ops. |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2052 | */ |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2053 | static void free_coherent(struct device *dev, size_t size, |
| 2054 | void *virt_addr, dma_addr_t dma_addr) |
| 2055 | { |
| 2056 | unsigned long flags; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2057 | struct protection_domain *domain; |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2058 | |
Joerg Roedel | 5d31ee7 | 2008-12-12 15:16:38 +0100 | [diff] [blame] | 2059 | INC_STATS_COUNTER(cnt_free_coherent); |
| 2060 | |
Joerg Roedel | 94f6d19 | 2009-11-24 16:40:02 +0100 | [diff] [blame^] | 2061 | domain = get_domain(dev); |
| 2062 | if (IS_ERR(domain)) |
Joerg Roedel | 5b28df6 | 2008-12-02 17:49:42 +0100 | [diff] [blame] | 2063 | goto free_mem; |
| 2064 | |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2065 | spin_lock_irqsave(&domain->lock, flags); |
| 2066 | |
Joerg Roedel | cd8c82e | 2009-11-23 19:33:56 +0100 | [diff] [blame] | 2067 | __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2068 | |
Joerg Roedel | 0518a3a | 2009-11-20 16:00:05 +0100 | [diff] [blame] | 2069 | iommu_flush_complete(domain); |
Joerg Roedel | 5d8b53c | 2008-06-26 21:28:03 +0200 | [diff] [blame] | 2070 | |
| 2071 | spin_unlock_irqrestore(&domain->lock, flags); |
| 2072 | |
| 2073 | free_mem: |
| 2074 | free_pages((unsigned long)virt_addr, get_order(size)); |
| 2075 | } |
| 2076 | |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2077 | /* |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2078 | * This function is called by the DMA layer to find out if we can handle a |
| 2079 | * particular device. It is part of the dma_ops. |
| 2080 | */ |
| 2081 | static int amd_iommu_dma_supported(struct device *dev, u64 mask) |
| 2082 | { |
Joerg Roedel | 420aef8 | 2009-11-23 16:14:57 +0100 | [diff] [blame] | 2083 | return check_device(dev); |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2084 | } |
| 2085 | |
| 2086 | /* |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2087 | * The function for pre-allocating protection domains. |
| 2088 | * |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2089 | * If the driver core informs the DMA layer if a driver grabs a device |
| 2090 | * we don't need to preallocate the protection domains anymore. |
| 2091 | * For now we have to. |
| 2092 | */ |
Jaswinder Singh Rajput | 0e93dd8 | 2008-12-29 21:45:22 +0530 | [diff] [blame] | 2093 | static void prealloc_protection_domains(void) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2094 | { |
| 2095 | struct pci_dev *dev = NULL; |
| 2096 | struct dma_ops_domain *dma_dom; |
| 2097 | struct amd_iommu *iommu; |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2098 | u16 devid, __devid; |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2099 | |
| 2100 | while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2101 | __devid = devid = calc_devid(dev->bus->number, dev->devfn); |
Joerg Roedel | 3a61ec3 | 2008-07-25 13:07:50 +0200 | [diff] [blame] | 2102 | if (devid > amd_iommu_last_bdf) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2103 | continue; |
| 2104 | devid = amd_iommu_alias_table[devid]; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2105 | if (domain_for_device(&dev->dev)) |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2106 | continue; |
| 2107 | iommu = amd_iommu_rlookup_table[devid]; |
| 2108 | if (!iommu) |
| 2109 | continue; |
Joerg Roedel | d9cfed9 | 2009-05-19 12:16:29 +0200 | [diff] [blame] | 2110 | dma_dom = dma_ops_domain_alloc(iommu); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2111 | if (!dma_dom) |
| 2112 | continue; |
| 2113 | init_unity_mappings_for_device(dma_dom, devid); |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2114 | dma_dom->target_dev = devid; |
| 2115 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2116 | attach_device(&dev->dev, &dma_dom->domain); |
Joerg Roedel | be83129 | 2009-11-23 12:50:00 +0100 | [diff] [blame] | 2117 | |
Joerg Roedel | bd60b73 | 2008-09-11 10:24:48 +0200 | [diff] [blame] | 2118 | list_add_tail(&dma_dom->list, &iommu_pd_list); |
Joerg Roedel | c432f3d | 2008-06-26 21:28:04 +0200 | [diff] [blame] | 2119 | } |
| 2120 | } |
| 2121 | |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 2122 | static struct dma_map_ops amd_iommu_dma_ops = { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2123 | .alloc_coherent = alloc_coherent, |
| 2124 | .free_coherent = free_coherent, |
FUJITA Tomonori | 5149136 | 2009-01-05 23:47:25 +0900 | [diff] [blame] | 2125 | .map_page = map_page, |
| 2126 | .unmap_page = unmap_page, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2127 | .map_sg = map_sg, |
| 2128 | .unmap_sg = unmap_sg, |
Joerg Roedel | b39ba6a | 2008-09-09 18:40:46 +0200 | [diff] [blame] | 2129 | .dma_supported = amd_iommu_dma_supported, |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2130 | }; |
| 2131 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2132 | /* |
| 2133 | * The function which clues the AMD IOMMU driver into dma_ops. |
| 2134 | */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2135 | int __init amd_iommu_init_dma_ops(void) |
| 2136 | { |
| 2137 | struct amd_iommu *iommu; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2138 | int ret; |
| 2139 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2140 | /* |
| 2141 | * first allocate a default protection domain for every IOMMU we |
| 2142 | * found in the system. Devices not assigned to any other |
| 2143 | * protection domain will be assigned to the default one. |
| 2144 | */ |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2145 | for_each_iommu(iommu) { |
Joerg Roedel | d9cfed9 | 2009-05-19 12:16:29 +0200 | [diff] [blame] | 2146 | iommu->default_dom = dma_ops_domain_alloc(iommu); |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2147 | if (iommu->default_dom == NULL) |
| 2148 | return -ENOMEM; |
Joerg Roedel | e2dc14a | 2008-12-10 18:48:59 +0100 | [diff] [blame] | 2149 | iommu->default_dom->domain.flags |= PD_DEFAULT_MASK; |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2150 | ret = iommu_init_unity_mappings(iommu); |
| 2151 | if (ret) |
| 2152 | goto free_domains; |
| 2153 | } |
| 2154 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2155 | /* |
| 2156 | * If device isolation is enabled, pre-allocate the protection |
| 2157 | * domains for each device. |
| 2158 | */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2159 | if (amd_iommu_isolate) |
| 2160 | prealloc_protection_domains(); |
| 2161 | |
| 2162 | iommu_detected = 1; |
FUJITA Tomonori | 75f1cdf | 2009-11-10 19:46:20 +0900 | [diff] [blame] | 2163 | swiotlb = 0; |
Ingo Molnar | 92af4e2 | 2008-06-27 10:48:16 +0200 | [diff] [blame] | 2164 | #ifdef CONFIG_GART_IOMMU |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2165 | gart_iommu_aperture_disabled = 1; |
| 2166 | gart_iommu_aperture = 0; |
Ingo Molnar | 92af4e2 | 2008-06-27 10:48:16 +0200 | [diff] [blame] | 2167 | #endif |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2168 | |
Joerg Roedel | 431b2a2 | 2008-07-11 17:14:22 +0200 | [diff] [blame] | 2169 | /* Make the driver finally visible to the drivers */ |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2170 | dma_ops = &amd_iommu_dma_ops; |
| 2171 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2172 | register_iommu(&amd_iommu_ops); |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2173 | |
Joerg Roedel | e275a2a | 2008-12-10 18:27:25 +0100 | [diff] [blame] | 2174 | bus_register_notifier(&pci_bus_type, &device_nb); |
| 2175 | |
Joerg Roedel | 7f26508 | 2008-12-12 13:50:21 +0100 | [diff] [blame] | 2176 | amd_iommu_stats_init(); |
| 2177 | |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2178 | return 0; |
| 2179 | |
| 2180 | free_domains: |
| 2181 | |
Joerg Roedel | 3bd2217 | 2009-05-04 15:06:20 +0200 | [diff] [blame] | 2182 | for_each_iommu(iommu) { |
Joerg Roedel | 6631ee9 | 2008-06-26 21:28:05 +0200 | [diff] [blame] | 2183 | if (iommu->default_dom) |
| 2184 | dma_ops_domain_free(iommu->default_dom); |
| 2185 | } |
| 2186 | |
| 2187 | return ret; |
| 2188 | } |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2189 | |
| 2190 | /***************************************************************************** |
| 2191 | * |
| 2192 | * The following functions belong to the exported interface of AMD IOMMU |
| 2193 | * |
| 2194 | * This interface allows access to lower level functions of the IOMMU |
| 2195 | * like protection domain handling and assignement of devices to domains |
| 2196 | * which is not possible with the dma_ops interface. |
| 2197 | * |
| 2198 | *****************************************************************************/ |
| 2199 | |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2200 | static void cleanup_domain(struct protection_domain *domain) |
| 2201 | { |
| 2202 | unsigned long flags; |
| 2203 | u16 devid; |
| 2204 | |
| 2205 | write_lock_irqsave(&amd_iommu_devtable_lock, flags); |
| 2206 | |
| 2207 | for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) |
| 2208 | if (amd_iommu_pd_table[devid] == domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2209 | clear_dte_entry(devid); |
Joerg Roedel | 6d98cd8 | 2008-12-08 12:05:55 +0100 | [diff] [blame] | 2210 | |
| 2211 | write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); |
| 2212 | } |
| 2213 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2214 | static void protection_domain_free(struct protection_domain *domain) |
| 2215 | { |
| 2216 | if (!domain) |
| 2217 | return; |
| 2218 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2219 | del_domain_from_list(domain); |
| 2220 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2221 | if (domain->id) |
| 2222 | domain_id_free(domain->id); |
| 2223 | |
| 2224 | kfree(domain); |
| 2225 | } |
| 2226 | |
| 2227 | static struct protection_domain *protection_domain_alloc(void) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2228 | { |
| 2229 | struct protection_domain *domain; |
| 2230 | |
| 2231 | domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| 2232 | if (!domain) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2233 | return NULL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2234 | |
| 2235 | spin_lock_init(&domain->lock); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2236 | domain->id = domain_id_alloc(); |
| 2237 | if (!domain->id) |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2238 | goto out_err; |
| 2239 | |
Joerg Roedel | aeb26f5 | 2009-11-20 16:44:01 +0100 | [diff] [blame] | 2240 | add_domain_to_list(domain); |
| 2241 | |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2242 | return domain; |
| 2243 | |
| 2244 | out_err: |
| 2245 | kfree(domain); |
| 2246 | |
| 2247 | return NULL; |
| 2248 | } |
| 2249 | |
| 2250 | static int amd_iommu_domain_init(struct iommu_domain *dom) |
| 2251 | { |
| 2252 | struct protection_domain *domain; |
| 2253 | |
| 2254 | domain = protection_domain_alloc(); |
| 2255 | if (!domain) |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2256 | goto out_free; |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2257 | |
| 2258 | domain->mode = PAGE_MODE_3_LEVEL; |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2259 | domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); |
| 2260 | if (!domain->pt_root) |
| 2261 | goto out_free; |
| 2262 | |
| 2263 | dom->priv = domain; |
| 2264 | |
| 2265 | return 0; |
| 2266 | |
| 2267 | out_free: |
Joerg Roedel | 2650815 | 2009-08-26 16:52:40 +0200 | [diff] [blame] | 2268 | protection_domain_free(domain); |
Joerg Roedel | c156e34 | 2008-12-02 18:13:27 +0100 | [diff] [blame] | 2269 | |
| 2270 | return -ENOMEM; |
| 2271 | } |
| 2272 | |
Joerg Roedel | 98383fc | 2008-12-02 18:34:12 +0100 | [diff] [blame] | 2273 | static void amd_iommu_domain_destroy(struct iommu_domain *dom) |
| 2274 | { |
| 2275 | struct protection_domain *domain = dom->priv; |
| 2276 | |
| 2277 | if (!domain) |
| 2278 | return; |
| 2279 | |
| 2280 | if (domain->dev_cnt > 0) |
| 2281 | cleanup_domain(domain); |
| 2282 | |
| 2283 | BUG_ON(domain->dev_cnt != 0); |
| 2284 | |
| 2285 | free_pagetable(domain); |
| 2286 | |
| 2287 | domain_id_free(domain->id); |
| 2288 | |
| 2289 | kfree(domain); |
| 2290 | |
| 2291 | dom->priv = NULL; |
| 2292 | } |
| 2293 | |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2294 | static void amd_iommu_detach_device(struct iommu_domain *dom, |
| 2295 | struct device *dev) |
| 2296 | { |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2297 | struct amd_iommu *iommu; |
| 2298 | struct pci_dev *pdev; |
| 2299 | u16 devid; |
| 2300 | |
| 2301 | if (dev->bus != &pci_bus_type) |
| 2302 | return; |
| 2303 | |
| 2304 | pdev = to_pci_dev(dev); |
| 2305 | |
| 2306 | devid = calc_devid(pdev->bus->number, pdev->devfn); |
| 2307 | |
| 2308 | if (devid > 0) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2309 | detach_device(dev); |
Joerg Roedel | 684f288 | 2008-12-08 12:07:44 +0100 | [diff] [blame] | 2310 | |
| 2311 | iommu = amd_iommu_rlookup_table[devid]; |
| 2312 | if (!iommu) |
| 2313 | return; |
| 2314 | |
| 2315 | iommu_queue_inv_dev_entry(iommu, devid); |
| 2316 | iommu_completion_wait(iommu); |
| 2317 | } |
| 2318 | |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2319 | static int amd_iommu_attach_device(struct iommu_domain *dom, |
| 2320 | struct device *dev) |
| 2321 | { |
| 2322 | struct protection_domain *domain = dom->priv; |
| 2323 | struct protection_domain *old_domain; |
| 2324 | struct amd_iommu *iommu; |
| 2325 | struct pci_dev *pdev; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2326 | int ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2327 | u16 devid; |
| 2328 | |
| 2329 | if (dev->bus != &pci_bus_type) |
| 2330 | return -EINVAL; |
| 2331 | |
| 2332 | pdev = to_pci_dev(dev); |
| 2333 | |
| 2334 | devid = calc_devid(pdev->bus->number, pdev->devfn); |
| 2335 | |
| 2336 | if (devid >= amd_iommu_last_bdf || |
| 2337 | devid != amd_iommu_alias_table[devid]) |
| 2338 | return -EINVAL; |
| 2339 | |
| 2340 | iommu = amd_iommu_rlookup_table[devid]; |
| 2341 | if (!iommu) |
| 2342 | return -EINVAL; |
| 2343 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2344 | old_domain = amd_iommu_pd_table[devid]; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2345 | if (old_domain) |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2346 | detach_device(dev); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2347 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2348 | ret = attach_device(dev, domain); |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2349 | |
| 2350 | iommu_completion_wait(iommu); |
| 2351 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2352 | return ret; |
Joerg Roedel | 0110606 | 2008-12-02 19:34:11 +0100 | [diff] [blame] | 2353 | } |
| 2354 | |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2355 | static int amd_iommu_map_range(struct iommu_domain *dom, |
| 2356 | unsigned long iova, phys_addr_t paddr, |
| 2357 | size_t size, int iommu_prot) |
| 2358 | { |
| 2359 | struct protection_domain *domain = dom->priv; |
| 2360 | unsigned long i, npages = iommu_num_pages(paddr, size, PAGE_SIZE); |
| 2361 | int prot = 0; |
| 2362 | int ret; |
| 2363 | |
| 2364 | if (iommu_prot & IOMMU_READ) |
| 2365 | prot |= IOMMU_PROT_IR; |
| 2366 | if (iommu_prot & IOMMU_WRITE) |
| 2367 | prot |= IOMMU_PROT_IW; |
| 2368 | |
| 2369 | iova &= PAGE_MASK; |
| 2370 | paddr &= PAGE_MASK; |
| 2371 | |
| 2372 | for (i = 0; i < npages; ++i) { |
Joerg Roedel | abdc5eb | 2009-09-03 11:33:51 +0200 | [diff] [blame] | 2373 | ret = iommu_map_page(domain, iova, paddr, prot, PM_MAP_4k); |
Joerg Roedel | c6229ca | 2008-12-02 19:48:43 +0100 | [diff] [blame] | 2374 | if (ret) |
| 2375 | return ret; |
| 2376 | |
| 2377 | iova += PAGE_SIZE; |
| 2378 | paddr += PAGE_SIZE; |
| 2379 | } |
| 2380 | |
| 2381 | return 0; |
| 2382 | } |
| 2383 | |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2384 | static void amd_iommu_unmap_range(struct iommu_domain *dom, |
| 2385 | unsigned long iova, size_t size) |
| 2386 | { |
| 2387 | |
| 2388 | struct protection_domain *domain = dom->priv; |
| 2389 | unsigned long i, npages = iommu_num_pages(iova, size, PAGE_SIZE); |
| 2390 | |
| 2391 | iova &= PAGE_MASK; |
| 2392 | |
| 2393 | for (i = 0; i < npages; ++i) { |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 2394 | iommu_unmap_page(domain, iova, PM_MAP_4k); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2395 | iova += PAGE_SIZE; |
| 2396 | } |
| 2397 | |
Joerg Roedel | 601367d | 2009-11-20 16:08:55 +0100 | [diff] [blame] | 2398 | iommu_flush_tlb_pde(domain); |
Joerg Roedel | eb74ff6 | 2008-12-02 19:59:10 +0100 | [diff] [blame] | 2399 | } |
| 2400 | |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2401 | static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, |
| 2402 | unsigned long iova) |
| 2403 | { |
| 2404 | struct protection_domain *domain = dom->priv; |
| 2405 | unsigned long offset = iova & ~PAGE_MASK; |
| 2406 | phys_addr_t paddr; |
| 2407 | u64 *pte; |
| 2408 | |
Joerg Roedel | a6b256b | 2009-09-03 12:21:31 +0200 | [diff] [blame] | 2409 | pte = fetch_pte(domain, iova, PM_MAP_4k); |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2410 | |
Joerg Roedel | a6d41a4 | 2009-09-02 17:08:55 +0200 | [diff] [blame] | 2411 | if (!pte || !IOMMU_PTE_PRESENT(*pte)) |
Joerg Roedel | 645c4c8 | 2008-12-02 20:05:50 +0100 | [diff] [blame] | 2412 | return 0; |
| 2413 | |
| 2414 | paddr = *pte & IOMMU_PAGE_MASK; |
| 2415 | paddr |= offset; |
| 2416 | |
| 2417 | return paddr; |
| 2418 | } |
| 2419 | |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2420 | static int amd_iommu_domain_has_cap(struct iommu_domain *domain, |
| 2421 | unsigned long cap) |
| 2422 | { |
| 2423 | return 0; |
| 2424 | } |
| 2425 | |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2426 | static struct iommu_ops amd_iommu_ops = { |
| 2427 | .domain_init = amd_iommu_domain_init, |
| 2428 | .domain_destroy = amd_iommu_domain_destroy, |
| 2429 | .attach_dev = amd_iommu_attach_device, |
| 2430 | .detach_dev = amd_iommu_detach_device, |
| 2431 | .map = amd_iommu_map_range, |
| 2432 | .unmap = amd_iommu_unmap_range, |
| 2433 | .iova_to_phys = amd_iommu_iova_to_phys, |
Sheng Yang | dbb9fd8 | 2009-03-18 15:33:06 +0800 | [diff] [blame] | 2434 | .domain_has_cap = amd_iommu_domain_has_cap, |
Joerg Roedel | 26961ef | 2008-12-03 17:00:17 +0100 | [diff] [blame] | 2435 | }; |
| 2436 | |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2437 | /***************************************************************************** |
| 2438 | * |
| 2439 | * The next functions do a basic initialization of IOMMU for pass through |
| 2440 | * mode |
| 2441 | * |
| 2442 | * In passthrough mode the IOMMU is initialized and enabled but not used for |
| 2443 | * DMA-API translation. |
| 2444 | * |
| 2445 | *****************************************************************************/ |
| 2446 | |
| 2447 | int __init amd_iommu_init_passthrough(void) |
| 2448 | { |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2449 | struct amd_iommu *iommu; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2450 | struct pci_dev *dev = NULL; |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2451 | u16 devid; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2452 | |
| 2453 | /* allocate passthroug domain */ |
| 2454 | pt_domain = protection_domain_alloc(); |
| 2455 | if (!pt_domain) |
| 2456 | return -ENOMEM; |
| 2457 | |
| 2458 | pt_domain->mode |= PAGE_MODE_NONE; |
| 2459 | |
| 2460 | while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2461 | |
| 2462 | devid = calc_devid(dev->bus->number, dev->devfn); |
| 2463 | if (devid > amd_iommu_last_bdf) |
| 2464 | continue; |
| 2465 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2466 | iommu = amd_iommu_rlookup_table[devid]; |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2467 | if (!iommu) |
| 2468 | continue; |
| 2469 | |
Joerg Roedel | 15898bb | 2009-11-24 15:39:42 +0100 | [diff] [blame] | 2470 | attach_device(&dev->dev, pt_domain); |
Joerg Roedel | 0feae53 | 2009-08-26 15:26:30 +0200 | [diff] [blame] | 2471 | } |
| 2472 | |
| 2473 | pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); |
| 2474 | |
| 2475 | return 0; |
| 2476 | } |