Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 2 | /* |
| 3 | * VFIO: IOMMU DMA mapping support for TCE on POWER |
| 4 | * |
| 5 | * Copyright (C) 2013 IBM Corp. All rights reserved. |
| 6 | * Author: Alexey Kardashevskiy <aik@ozlabs.ru> |
| 7 | * |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 8 | * Derived from original vfio_iommu_type1.c: |
| 9 | * Copyright (C) 2012 Red Hat, Inc. All rights reserved. |
| 10 | * Author: Alex Williamson <alex.williamson@redhat.com> |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/pci.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/uaccess.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/vfio.h> |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 19 | #include <linux/vmalloc.h> |
Ingo Molnar | 6e84f31 | 2017-02-08 18:51:29 +0100 | [diff] [blame] | 20 | #include <linux/sched/mm.h> |
Ingo Molnar | 3f07c01 | 2017-02-08 18:51:30 +0100 | [diff] [blame] | 21 | #include <linux/sched/signal.h> |
Daniel Jordan | 79eb597 | 2019-07-16 16:30:54 -0700 | [diff] [blame] | 22 | #include <linux/mm.h> |
Ingo Molnar | 6e84f31 | 2017-02-08 18:51:29 +0100 | [diff] [blame] | 23 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 24 | #include <asm/iommu.h> |
| 25 | #include <asm/tce.h> |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 26 | #include <asm/mmu_context.h> |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 27 | |
| 28 | #define DRIVER_VERSION "0.1" |
| 29 | #define DRIVER_AUTHOR "aik@ozlabs.ru" |
| 30 | #define DRIVER_DESC "VFIO IOMMU SPAPR TCE" |
| 31 | |
| 32 | static void tce_iommu_detach_group(void *iommu_data, |
| 33 | struct iommu_group *iommu_group); |
| 34 | |
| 35 | /* |
| 36 | * VFIO IOMMU fd for SPAPR_TCE IOMMU implementation |
| 37 | * |
| 38 | * This code handles mapping and unmapping of user data buffers |
| 39 | * into DMA'ble space using the IOMMU |
| 40 | */ |
| 41 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 42 | struct tce_iommu_group { |
| 43 | struct list_head next; |
| 44 | struct iommu_group *grp; |
| 45 | }; |
| 46 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 47 | /* |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 48 | * A container needs to remember which preregistered region it has |
| 49 | * referenced to do proper cleanup at the userspace process exit. |
| 50 | */ |
| 51 | struct tce_iommu_prereg { |
| 52 | struct list_head next; |
| 53 | struct mm_iommu_table_group_mem_t *mem; |
| 54 | }; |
| 55 | |
| 56 | /* |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 57 | * The container descriptor supports only a single group per container. |
| 58 | * Required by the API as the container is not supplied with the IOMMU group |
| 59 | * at the moment of initialization. |
| 60 | */ |
| 61 | struct tce_container { |
| 62 | struct mutex lock; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 63 | bool enabled; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 64 | bool v2; |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 65 | bool def_window_pending; |
Alexey Kardashevskiy | 2d270df | 2015-06-05 16:35:01 +1000 | [diff] [blame] | 66 | unsigned long locked_pages; |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 67 | struct mm_struct *mm; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 68 | struct iommu_table *tables[IOMMU_TABLE_GROUP_MAX_TABLES]; |
| 69 | struct list_head group_list; |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 70 | struct list_head prereg_list; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 71 | }; |
| 72 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 73 | static long tce_iommu_mm_set(struct tce_container *container) |
| 74 | { |
| 75 | if (container->mm) { |
| 76 | if (container->mm == current->mm) |
| 77 | return 0; |
| 78 | return -EPERM; |
| 79 | } |
| 80 | BUG_ON(!current->mm); |
| 81 | container->mm = current->mm; |
Julia Lawall | 7a49de9 | 2019-12-29 16:42:57 +0100 | [diff] [blame] | 82 | mmgrab(container->mm); |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 87 | static long tce_iommu_prereg_free(struct tce_container *container, |
| 88 | struct tce_iommu_prereg *tcemem) |
| 89 | { |
| 90 | long ret; |
| 91 | |
| 92 | ret = mm_iommu_put(container->mm, tcemem->mem); |
| 93 | if (ret) |
| 94 | return ret; |
| 95 | |
| 96 | list_del(&tcemem->next); |
| 97 | kfree(tcemem); |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 102 | static long tce_iommu_unregister_pages(struct tce_container *container, |
| 103 | __u64 vaddr, __u64 size) |
| 104 | { |
| 105 | struct mm_iommu_table_group_mem_t *mem; |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 106 | struct tce_iommu_prereg *tcemem; |
| 107 | bool found = false; |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 108 | long ret; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 109 | |
| 110 | if ((vaddr & ~PAGE_MASK) || (size & ~PAGE_MASK)) |
| 111 | return -EINVAL; |
| 112 | |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 113 | mem = mm_iommu_get(container->mm, vaddr, size >> PAGE_SHIFT); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 114 | if (!mem) |
| 115 | return -ENOENT; |
| 116 | |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 117 | list_for_each_entry(tcemem, &container->prereg_list, next) { |
| 118 | if (tcemem->mem == mem) { |
| 119 | found = true; |
| 120 | break; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | if (!found) |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 125 | ret = -ENOENT; |
| 126 | else |
| 127 | ret = tce_iommu_prereg_free(container, tcemem); |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 128 | |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 129 | mm_iommu_put(container->mm, mem); |
| 130 | |
| 131 | return ret; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | static long tce_iommu_register_pages(struct tce_container *container, |
| 135 | __u64 vaddr, __u64 size) |
| 136 | { |
| 137 | long ret = 0; |
| 138 | struct mm_iommu_table_group_mem_t *mem = NULL; |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 139 | struct tce_iommu_prereg *tcemem; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 140 | unsigned long entries = size >> PAGE_SHIFT; |
| 141 | |
| 142 | if ((vaddr & ~PAGE_MASK) || (size & ~PAGE_MASK) || |
| 143 | ((vaddr + size) < vaddr)) |
| 144 | return -EINVAL; |
| 145 | |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 146 | mem = mm_iommu_get(container->mm, vaddr, entries); |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 147 | if (mem) { |
| 148 | list_for_each_entry(tcemem, &container->prereg_list, next) { |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 149 | if (tcemem->mem == mem) { |
| 150 | ret = -EBUSY; |
| 151 | goto put_exit; |
| 152 | } |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 153 | } |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 154 | } else { |
| 155 | ret = mm_iommu_new(container->mm, vaddr, entries, &mem); |
| 156 | if (ret) |
| 157 | return ret; |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 158 | } |
| 159 | |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 160 | tcemem = kzalloc(sizeof(*tcemem), GFP_KERNEL); |
Alexey Kardashevskiy | 3393af2 | 2017-03-27 14:23:40 +1100 | [diff] [blame] | 161 | if (!tcemem) { |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 162 | ret = -ENOMEM; |
| 163 | goto put_exit; |
Alexey Kardashevskiy | 3393af2 | 2017-03-27 14:23:40 +1100 | [diff] [blame] | 164 | } |
| 165 | |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 166 | tcemem->mem = mem; |
| 167 | list_add(&tcemem->next, &container->prereg_list); |
| 168 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 169 | container->enabled = true; |
| 170 | |
| 171 | return 0; |
Alexey Kardashevskiy | e0bf78b | 2018-12-19 19:52:14 +1100 | [diff] [blame] | 172 | |
| 173 | put_exit: |
| 174 | mm_iommu_put(container->mm, mem); |
| 175 | return ret; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 176 | } |
| 177 | |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 178 | static bool tce_page_is_contained(struct mm_struct *mm, unsigned long hpa, |
Matthew Wilcox (Oracle) | 94ad933 | 2019-09-23 15:34:28 -0700 | [diff] [blame] | 179 | unsigned int it_page_shift) |
Alexey Kardashevskiy | e432bc7 | 2015-06-05 16:34:59 +1000 | [diff] [blame] | 180 | { |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 181 | struct page *page; |
| 182 | unsigned long size = 0; |
| 183 | |
Matthew Wilcox (Oracle) | 94ad933 | 2019-09-23 15:34:28 -0700 | [diff] [blame] | 184 | if (mm_iommu_is_devmem(mm, hpa, it_page_shift, &size)) |
| 185 | return size == (1UL << it_page_shift); |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 186 | |
| 187 | page = pfn_to_page(hpa >> PAGE_SHIFT); |
Alexey Kardashevskiy | e432bc7 | 2015-06-05 16:34:59 +1000 | [diff] [blame] | 188 | /* |
| 189 | * Check that the TCE table granularity is not bigger than the size of |
| 190 | * a page we just found. Otherwise the hardware can get access to |
| 191 | * a bigger memory chunk that it should. |
| 192 | */ |
Matthew Wilcox (Oracle) | 94ad933 | 2019-09-23 15:34:28 -0700 | [diff] [blame] | 193 | return page_shift(compound_head(page)) >= it_page_shift; |
Alexey Kardashevskiy | e432bc7 | 2015-06-05 16:34:59 +1000 | [diff] [blame] | 194 | } |
| 195 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 196 | static inline bool tce_groups_attached(struct tce_container *container) |
| 197 | { |
| 198 | return !list_empty(&container->group_list); |
| 199 | } |
| 200 | |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 201 | static long tce_iommu_find_table(struct tce_container *container, |
| 202 | phys_addr_t ioba, struct iommu_table **ptbl) |
| 203 | { |
| 204 | long i; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 205 | |
| 206 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 207 | struct iommu_table *tbl = container->tables[i]; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 208 | |
| 209 | if (tbl) { |
| 210 | unsigned long entry = ioba >> tbl->it_page_shift; |
| 211 | unsigned long start = tbl->it_offset; |
| 212 | unsigned long end = start + tbl->it_size; |
| 213 | |
| 214 | if ((start <= entry) && (entry < end)) { |
| 215 | *ptbl = tbl; |
| 216 | return i; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | return -1; |
| 222 | } |
| 223 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 224 | static int tce_iommu_find_free_table(struct tce_container *container) |
| 225 | { |
| 226 | int i; |
| 227 | |
| 228 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
| 229 | if (!container->tables[i]) |
| 230 | return i; |
| 231 | } |
| 232 | |
| 233 | return -ENOSPC; |
| 234 | } |
| 235 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 236 | static int tce_iommu_enable(struct tce_container *container) |
| 237 | { |
| 238 | int ret = 0; |
Alexey Kardashevskiy | 2d270df | 2015-06-05 16:35:01 +1000 | [diff] [blame] | 239 | unsigned long locked; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 240 | struct iommu_table_group *table_group; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 241 | struct tce_iommu_group *tcegrp; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 242 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 243 | if (container->enabled) |
| 244 | return -EBUSY; |
| 245 | |
| 246 | /* |
| 247 | * When userspace pages are mapped into the IOMMU, they are effectively |
| 248 | * locked memory, so, theoretically, we need to update the accounting |
| 249 | * of locked pages on each map and unmap. For powerpc, the map unmap |
| 250 | * paths can be very hot, though, and the accounting would kill |
| 251 | * performance, especially since it would be difficult to impossible |
| 252 | * to handle the accounting in real mode only. |
| 253 | * |
| 254 | * To address that, rather than precisely accounting every page, we |
| 255 | * instead account for a worst case on locked memory when the iommu is |
| 256 | * enabled and disabled. The worst case upper bound on locked memory |
| 257 | * is the size of the whole iommu window, which is usually relatively |
| 258 | * small (compared to total memory sizes) on POWER hardware. |
| 259 | * |
| 260 | * Also we don't have a nice way to fail on H_PUT_TCE due to ulimits, |
| 261 | * that would effectively kill the guest at random points, much better |
| 262 | * enforcing the limit based on the max that the guest can map. |
Alexey Kardashevskiy | 2d270df | 2015-06-05 16:35:01 +1000 | [diff] [blame] | 263 | * |
| 264 | * Unfortunately at the moment it counts whole tables, no matter how |
| 265 | * much memory the guest has. I.e. for 4GB guest and 4 IOMMU groups |
| 266 | * each with 2GB DMA window, 8GB will be counted here. The reason for |
| 267 | * this is that we cannot tell here the amount of RAM used by the guest |
| 268 | * as this information is only available from KVM and VFIO is |
| 269 | * KVM agnostic. |
Alexey Kardashevskiy | 4793d65 | 2015-06-05 16:35:20 +1000 | [diff] [blame] | 270 | * |
| 271 | * So we do not allow enabling a container without a group attached |
| 272 | * as there is no way to know how much we should increment |
| 273 | * the locked_vm counter. |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 274 | */ |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 275 | if (!tce_groups_attached(container)) |
| 276 | return -ENODEV; |
| 277 | |
| 278 | tcegrp = list_first_entry(&container->group_list, |
| 279 | struct tce_iommu_group, next); |
| 280 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 281 | if (!table_group) |
| 282 | return -ENODEV; |
| 283 | |
Alexey Kardashevskiy | 4793d65 | 2015-06-05 16:35:20 +1000 | [diff] [blame] | 284 | if (!table_group->tce32_size) |
| 285 | return -EPERM; |
| 286 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 287 | ret = tce_iommu_mm_set(container); |
| 288 | if (ret) |
| 289 | return ret; |
| 290 | |
Alexey Kardashevskiy | 4793d65 | 2015-06-05 16:35:20 +1000 | [diff] [blame] | 291 | locked = table_group->tce32_size >> PAGE_SHIFT; |
Daniel Jordan | 79eb597 | 2019-07-16 16:30:54 -0700 | [diff] [blame] | 292 | ret = account_locked_vm(container->mm, locked, true); |
Alexey Kardashevskiy | 2d270df | 2015-06-05 16:35:01 +1000 | [diff] [blame] | 293 | if (ret) |
| 294 | return ret; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 295 | |
Alexey Kardashevskiy | 2d270df | 2015-06-05 16:35:01 +1000 | [diff] [blame] | 296 | container->locked_pages = locked; |
| 297 | |
| 298 | container->enabled = true; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 299 | |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | static void tce_iommu_disable(struct tce_container *container) |
| 304 | { |
| 305 | if (!container->enabled) |
| 306 | return; |
| 307 | |
| 308 | container->enabled = false; |
| 309 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 310 | BUG_ON(!container->mm); |
Daniel Jordan | 79eb597 | 2019-07-16 16:30:54 -0700 | [diff] [blame] | 311 | account_locked_vm(container->mm, container->locked_pages, false); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | static void *tce_iommu_open(unsigned long arg) |
| 315 | { |
| 316 | struct tce_container *container; |
| 317 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 318 | if ((arg != VFIO_SPAPR_TCE_IOMMU) && (arg != VFIO_SPAPR_TCE_v2_IOMMU)) { |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 319 | pr_err("tce_vfio: Wrong IOMMU type\n"); |
| 320 | return ERR_PTR(-EINVAL); |
| 321 | } |
| 322 | |
| 323 | container = kzalloc(sizeof(*container), GFP_KERNEL); |
| 324 | if (!container) |
| 325 | return ERR_PTR(-ENOMEM); |
| 326 | |
| 327 | mutex_init(&container->lock); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 328 | INIT_LIST_HEAD_RCU(&container->group_list); |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 329 | INIT_LIST_HEAD_RCU(&container->prereg_list); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 330 | |
| 331 | container->v2 = arg == VFIO_SPAPR_TCE_v2_IOMMU; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 332 | |
| 333 | return container; |
| 334 | } |
| 335 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 336 | static int tce_iommu_clear(struct tce_container *container, |
| 337 | struct iommu_table *tbl, |
| 338 | unsigned long entry, unsigned long pages); |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 339 | static void tce_iommu_free_table(struct tce_container *container, |
| 340 | struct iommu_table *tbl); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 341 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 342 | static void tce_iommu_release(void *iommu_data) |
| 343 | { |
| 344 | struct tce_container *container = iommu_data; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 345 | struct tce_iommu_group *tcegrp; |
Alexey Kardashevskiy | 517ad4a | 2018-10-02 13:22:31 +1000 | [diff] [blame] | 346 | struct tce_iommu_prereg *tcemem, *tmtmp; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 347 | long i; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 348 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 349 | while (tce_groups_attached(container)) { |
| 350 | tcegrp = list_first_entry(&container->group_list, |
| 351 | struct tce_iommu_group, next); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 352 | tce_iommu_detach_group(iommu_data, tcegrp->grp); |
| 353 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 354 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 355 | /* |
| 356 | * If VFIO created a table, it was not disposed |
| 357 | * by tce_iommu_detach_group() so do it now. |
| 358 | */ |
| 359 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
| 360 | struct iommu_table *tbl = container->tables[i]; |
| 361 | |
| 362 | if (!tbl) |
| 363 | continue; |
| 364 | |
| 365 | tce_iommu_clear(container, tbl, tbl->it_offset, tbl->it_size); |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 366 | tce_iommu_free_table(container, tbl); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 367 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 368 | |
Alexey Kardashevskiy | 517ad4a | 2018-10-02 13:22:31 +1000 | [diff] [blame] | 369 | list_for_each_entry_safe(tcemem, tmtmp, &container->prereg_list, next) |
| 370 | WARN_ON(tce_iommu_prereg_free(container, tcemem)); |
Alexey Kardashevskiy | 4b6fad7 | 2016-11-30 17:52:05 +1100 | [diff] [blame] | 371 | |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 372 | tce_iommu_disable(container); |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 373 | if (container->mm) |
| 374 | mmdrop(container->mm); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 375 | mutex_destroy(&container->lock); |
| 376 | |
| 377 | kfree(container); |
| 378 | } |
| 379 | |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 380 | static void tce_iommu_unuse_page(struct tce_container *container, |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 381 | unsigned long hpa) |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 382 | { |
| 383 | struct page *page; |
| 384 | |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 385 | page = pfn_to_page(hpa >> PAGE_SHIFT); |
John Hubbard | 9d532f2 | 2020-07-27 13:43:38 -0600 | [diff] [blame] | 386 | unpin_user_page(page); |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 387 | } |
| 388 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 389 | static int tce_iommu_prereg_ua_to_hpa(struct tce_container *container, |
Alexey Kardashevskiy | 1463edc | 2018-07-17 17:19:12 +1000 | [diff] [blame] | 390 | unsigned long tce, unsigned long shift, |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 391 | unsigned long *phpa, struct mm_iommu_table_group_mem_t **pmem) |
| 392 | { |
| 393 | long ret = 0; |
| 394 | struct mm_iommu_table_group_mem_t *mem; |
| 395 | |
Alexey Kardashevskiy | 1463edc | 2018-07-17 17:19:12 +1000 | [diff] [blame] | 396 | mem = mm_iommu_lookup(container->mm, tce, 1ULL << shift); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 397 | if (!mem) |
| 398 | return -EINVAL; |
| 399 | |
Alexey Kardashevskiy | 76fa497 | 2018-07-17 17:19:13 +1000 | [diff] [blame] | 400 | ret = mm_iommu_ua_to_hpa(mem, tce, shift, phpa); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 401 | if (ret) |
| 402 | return -EINVAL; |
| 403 | |
| 404 | *pmem = mem; |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 409 | static void tce_iommu_unuse_page_v2(struct tce_container *container, |
| 410 | struct iommu_table *tbl, unsigned long entry) |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 411 | { |
| 412 | struct mm_iommu_table_group_mem_t *mem = NULL; |
| 413 | int ret; |
| 414 | unsigned long hpa = 0; |
Alexey Kardashevskiy | 6e301a8 | 2018-10-15 21:08:41 +1100 | [diff] [blame] | 415 | __be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 416 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 417 | if (!pua) |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 418 | return; |
| 419 | |
Alexey Kardashevskiy | 00a5c58 | 2018-07-04 16:13:46 +1000 | [diff] [blame] | 420 | ret = tce_iommu_prereg_ua_to_hpa(container, be64_to_cpu(*pua), |
Michael Ellerman | b3124ec | 2018-08-13 15:59:06 +1000 | [diff] [blame] | 421 | tbl->it_page_shift, &hpa, &mem); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 422 | if (ret) |
Alexey Kardashevskiy | 00a5c58 | 2018-07-04 16:13:46 +1000 | [diff] [blame] | 423 | pr_debug("%s: tce %llx at #%lx was not cached, ret=%d\n", |
| 424 | __func__, be64_to_cpu(*pua), entry, ret); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 425 | if (mem) |
| 426 | mm_iommu_mapped_dec(mem); |
| 427 | |
Alexey Kardashevskiy | 00a5c58 | 2018-07-04 16:13:46 +1000 | [diff] [blame] | 428 | *pua = cpu_to_be64(0); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 429 | } |
| 430 | |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 431 | static int tce_iommu_clear(struct tce_container *container, |
| 432 | struct iommu_table *tbl, |
| 433 | unsigned long entry, unsigned long pages) |
| 434 | { |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 435 | unsigned long oldhpa; |
| 436 | long ret; |
| 437 | enum dma_data_direction direction; |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 438 | unsigned long lastentry = entry + pages, firstentry = entry; |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 439 | |
Alexey Kardashevskiy | 6e301a8 | 2018-10-15 21:08:41 +1100 | [diff] [blame] | 440 | for ( ; entry < lastentry; ++entry) { |
| 441 | if (tbl->it_indirect_levels && tbl->it_userspace) { |
| 442 | /* |
| 443 | * For multilevel tables, we can take a shortcut here |
| 444 | * and skip some TCEs as we know that the userspace |
| 445 | * addresses cache is a mirror of the real TCE table |
| 446 | * and if it is missing some indirect levels, then |
| 447 | * the hardware table does not have them allocated |
| 448 | * either and therefore does not require updating. |
| 449 | */ |
| 450 | __be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, |
| 451 | entry); |
| 452 | if (!pua) { |
| 453 | /* align to level_size which is power of two */ |
| 454 | entry |= tbl->it_level_size - 1; |
| 455 | continue; |
| 456 | } |
| 457 | } |
| 458 | |
Alexey Kardashevskiy | 5c2fefd | 2017-10-02 12:39:11 -0600 | [diff] [blame] | 459 | cond_resched(); |
| 460 | |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 461 | direction = DMA_NONE; |
| 462 | oldhpa = 0; |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 463 | ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry, &oldhpa, |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 464 | &direction); |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 465 | if (ret) |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 466 | continue; |
| 467 | |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 468 | if (direction == DMA_NONE) |
| 469 | continue; |
| 470 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 471 | if (container->v2) { |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 472 | tce_iommu_unuse_page_v2(container, tbl, entry); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 473 | continue; |
| 474 | } |
| 475 | |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 476 | tce_iommu_unuse_page(container, oldhpa); |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 477 | } |
| 478 | |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 479 | iommu_tce_kill(tbl, firstentry, pages); |
| 480 | |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 481 | return 0; |
| 482 | } |
| 483 | |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 484 | static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) |
| 485 | { |
| 486 | struct page *page = NULL; |
| 487 | enum dma_data_direction direction = iommu_tce_direction(tce); |
| 488 | |
John Hubbard | 9d532f2 | 2020-07-27 13:43:38 -0600 | [diff] [blame] | 489 | if (pin_user_pages_fast(tce & PAGE_MASK, 1, |
Ira Weiny | 73b0140 | 2019-05-13 17:17:11 -0700 | [diff] [blame] | 490 | direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, |
| 491 | &page) != 1) |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 492 | return -EFAULT; |
| 493 | |
| 494 | *hpa = __pa((unsigned long) page_address(page)); |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 499 | static long tce_iommu_build(struct tce_container *container, |
| 500 | struct iommu_table *tbl, |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 501 | unsigned long entry, unsigned long tce, unsigned long pages, |
| 502 | enum dma_data_direction direction) |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 503 | { |
| 504 | long i, ret = 0; |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 505 | unsigned long hpa; |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 506 | enum dma_data_direction dirtmp; |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 507 | |
| 508 | for (i = 0; i < pages; ++i) { |
| 509 | unsigned long offset = tce & IOMMU_PAGE_MASK(tbl) & ~PAGE_MASK; |
| 510 | |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 511 | ret = tce_iommu_use_page(tce, &hpa); |
| 512 | if (ret) |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 513 | break; |
Alexey Kardashevskiy | e432bc7 | 2015-06-05 16:34:59 +1000 | [diff] [blame] | 514 | |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 515 | if (!tce_page_is_contained(container->mm, hpa, |
| 516 | tbl->it_page_shift)) { |
Alexey Kardashevskiy | e432bc7 | 2015-06-05 16:34:59 +1000 | [diff] [blame] | 517 | ret = -EPERM; |
| 518 | break; |
| 519 | } |
| 520 | |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 521 | hpa |= offset; |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 522 | dirtmp = direction; |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 523 | ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry + i, |
| 524 | &hpa, &dirtmp); |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 525 | if (ret) { |
Alexey Kardashevskiy | 649354b | 2015-06-05 16:35:03 +1000 | [diff] [blame] | 526 | tce_iommu_unuse_page(container, hpa); |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 527 | pr_err("iommu_tce: %s failed ioba=%lx, tce=%lx, ret=%ld\n", |
| 528 | __func__, entry << tbl->it_page_shift, |
| 529 | tce, ret); |
| 530 | break; |
| 531 | } |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 532 | |
| 533 | if (dirtmp != DMA_NONE) |
| 534 | tce_iommu_unuse_page(container, hpa); |
| 535 | |
Alexey Kardashevskiy | 00663d4 | 2015-06-05 16:35:00 +1000 | [diff] [blame] | 536 | tce += IOMMU_PAGE_SIZE(tbl); |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | if (ret) |
| 540 | tce_iommu_clear(container, tbl, entry, i); |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 541 | else |
| 542 | iommu_tce_kill(tbl, entry, pages); |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 543 | |
| 544 | return ret; |
| 545 | } |
| 546 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 547 | static long tce_iommu_build_v2(struct tce_container *container, |
| 548 | struct iommu_table *tbl, |
| 549 | unsigned long entry, unsigned long tce, unsigned long pages, |
| 550 | enum dma_data_direction direction) |
| 551 | { |
| 552 | long i, ret = 0; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 553 | unsigned long hpa; |
| 554 | enum dma_data_direction dirtmp; |
| 555 | |
| 556 | for (i = 0; i < pages; ++i) { |
| 557 | struct mm_iommu_table_group_mem_t *mem = NULL; |
Alexey Kardashevskiy | 00a5c58 | 2018-07-04 16:13:46 +1000 | [diff] [blame] | 558 | __be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry + i); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 559 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 560 | ret = tce_iommu_prereg_ua_to_hpa(container, |
Alexey Kardashevskiy | 1463edc | 2018-07-17 17:19:12 +1000 | [diff] [blame] | 561 | tce, tbl->it_page_shift, &hpa, &mem); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 562 | if (ret) |
| 563 | break; |
| 564 | |
Alexey Kardashevskiy | c10c21e | 2018-12-19 19:52:15 +1100 | [diff] [blame] | 565 | if (!tce_page_is_contained(container->mm, hpa, |
| 566 | tbl->it_page_shift)) { |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 567 | ret = -EPERM; |
| 568 | break; |
| 569 | } |
| 570 | |
| 571 | /* Preserve offset within IOMMU page */ |
| 572 | hpa |= tce & IOMMU_PAGE_MASK(tbl) & ~PAGE_MASK; |
| 573 | dirtmp = direction; |
| 574 | |
| 575 | /* The registered region is being unregistered */ |
| 576 | if (mm_iommu_mapped_inc(mem)) |
| 577 | break; |
| 578 | |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 579 | ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry + i, |
| 580 | &hpa, &dirtmp); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 581 | if (ret) { |
| 582 | /* dirtmp cannot be DMA_NONE here */ |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 583 | tce_iommu_unuse_page_v2(container, tbl, entry + i); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 584 | pr_err("iommu_tce: %s failed ioba=%lx, tce=%lx, ret=%ld\n", |
| 585 | __func__, entry << tbl->it_page_shift, |
| 586 | tce, ret); |
| 587 | break; |
| 588 | } |
| 589 | |
| 590 | if (dirtmp != DMA_NONE) |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 591 | tce_iommu_unuse_page_v2(container, tbl, entry + i); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 592 | |
Alexey Kardashevskiy | 00a5c58 | 2018-07-04 16:13:46 +1000 | [diff] [blame] | 593 | *pua = cpu_to_be64(tce); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 594 | |
| 595 | tce += IOMMU_PAGE_SIZE(tbl); |
| 596 | } |
| 597 | |
| 598 | if (ret) |
| 599 | tce_iommu_clear(container, tbl, entry, i); |
Alexey Kardashevskiy | 650ab1e | 2019-08-29 18:52:50 +1000 | [diff] [blame] | 600 | else |
| 601 | iommu_tce_kill(tbl, entry, pages); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 602 | |
| 603 | return ret; |
| 604 | } |
| 605 | |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 606 | static long tce_iommu_create_table(struct tce_container *container, |
| 607 | struct iommu_table_group *table_group, |
| 608 | int num, |
| 609 | __u32 page_shift, |
| 610 | __u64 window_size, |
| 611 | __u32 levels, |
| 612 | struct iommu_table **ptbl) |
| 613 | { |
| 614 | long ret, table_size; |
| 615 | |
| 616 | table_size = table_group->ops->get_table_size(page_shift, window_size, |
| 617 | levels); |
| 618 | if (!table_size) |
| 619 | return -EINVAL; |
| 620 | |
Daniel Jordan | 79eb597 | 2019-07-16 16:30:54 -0700 | [diff] [blame] | 621 | ret = account_locked_vm(container->mm, table_size >> PAGE_SHIFT, true); |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 622 | if (ret) |
| 623 | return ret; |
| 624 | |
| 625 | ret = table_group->ops->create_table(table_group, num, |
| 626 | page_shift, window_size, levels, ptbl); |
| 627 | |
| 628 | WARN_ON(!ret && !(*ptbl)->it_ops->free); |
Alexey Kardashevskiy | a68bd12 | 2018-07-04 16:13:49 +1000 | [diff] [blame] | 629 | WARN_ON(!ret && ((*ptbl)->it_allocated_size > table_size)); |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 630 | |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 631 | return ret; |
| 632 | } |
| 633 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 634 | static void tce_iommu_free_table(struct tce_container *container, |
| 635 | struct iommu_table *tbl) |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 636 | { |
| 637 | unsigned long pages = tbl->it_allocated_size >> PAGE_SHIFT; |
| 638 | |
Alexey Kardashevskiy | e5afdf9 | 2017-03-22 15:21:50 +1100 | [diff] [blame] | 639 | iommu_tce_table_put(tbl); |
Daniel Jordan | 79eb597 | 2019-07-16 16:30:54 -0700 | [diff] [blame] | 640 | account_locked_vm(container->mm, pages, false); |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 641 | } |
| 642 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 643 | static long tce_iommu_create_window(struct tce_container *container, |
| 644 | __u32 page_shift, __u64 window_size, __u32 levels, |
| 645 | __u64 *start_addr) |
| 646 | { |
| 647 | struct tce_iommu_group *tcegrp; |
| 648 | struct iommu_table_group *table_group; |
| 649 | struct iommu_table *tbl = NULL; |
| 650 | long ret, num; |
| 651 | |
| 652 | num = tce_iommu_find_free_table(container); |
| 653 | if (num < 0) |
| 654 | return num; |
| 655 | |
| 656 | /* Get the first group for ops::create_table */ |
| 657 | tcegrp = list_first_entry(&container->group_list, |
| 658 | struct tce_iommu_group, next); |
| 659 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
| 660 | if (!table_group) |
| 661 | return -EFAULT; |
| 662 | |
| 663 | if (!(table_group->pgsizes & (1ULL << page_shift))) |
| 664 | return -EINVAL; |
| 665 | |
| 666 | if (!table_group->ops->set_window || !table_group->ops->unset_window || |
| 667 | !table_group->ops->get_table_size || |
| 668 | !table_group->ops->create_table) |
| 669 | return -EPERM; |
| 670 | |
| 671 | /* Create TCE table */ |
| 672 | ret = tce_iommu_create_table(container, table_group, num, |
| 673 | page_shift, window_size, levels, &tbl); |
| 674 | if (ret) |
| 675 | return ret; |
| 676 | |
| 677 | BUG_ON(!tbl->it_ops->free); |
| 678 | |
| 679 | /* |
| 680 | * Program the table to every group. |
| 681 | * Groups have been tested for compatibility at the attach time. |
| 682 | */ |
| 683 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 684 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
| 685 | |
| 686 | ret = table_group->ops->set_window(table_group, num, tbl); |
| 687 | if (ret) |
| 688 | goto unset_exit; |
| 689 | } |
| 690 | |
| 691 | container->tables[num] = tbl; |
| 692 | |
| 693 | /* Return start address assigned by platform in create_table() */ |
| 694 | *start_addr = tbl->it_offset << tbl->it_page_shift; |
| 695 | |
| 696 | return 0; |
| 697 | |
| 698 | unset_exit: |
| 699 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 700 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
| 701 | table_group->ops->unset_window(table_group, num); |
| 702 | } |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 703 | tce_iommu_free_table(container, tbl); |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 704 | |
| 705 | return ret; |
| 706 | } |
| 707 | |
| 708 | static long tce_iommu_remove_window(struct tce_container *container, |
| 709 | __u64 start_addr) |
| 710 | { |
| 711 | struct iommu_table_group *table_group = NULL; |
| 712 | struct iommu_table *tbl; |
| 713 | struct tce_iommu_group *tcegrp; |
| 714 | int num; |
| 715 | |
| 716 | num = tce_iommu_find_table(container, start_addr, &tbl); |
| 717 | if (num < 0) |
| 718 | return -EINVAL; |
| 719 | |
| 720 | BUG_ON(!tbl->it_size); |
| 721 | |
| 722 | /* Detach groups from IOMMUs */ |
| 723 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 724 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
| 725 | |
| 726 | /* |
| 727 | * SPAPR TCE IOMMU exposes the default DMA window to |
| 728 | * the guest via dma32_window_start/size of |
| 729 | * VFIO_IOMMU_SPAPR_TCE_GET_INFO. Some platforms allow |
| 730 | * the userspace to remove this window, some do not so |
| 731 | * here we check for the platform capability. |
| 732 | */ |
| 733 | if (!table_group->ops || !table_group->ops->unset_window) |
| 734 | return -EPERM; |
| 735 | |
| 736 | table_group->ops->unset_window(table_group, num); |
| 737 | } |
| 738 | |
| 739 | /* Free table */ |
| 740 | tce_iommu_clear(container, tbl, tbl->it_offset, tbl->it_size); |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 741 | tce_iommu_free_table(container, tbl); |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 742 | container->tables[num] = NULL; |
| 743 | |
| 744 | return 0; |
| 745 | } |
| 746 | |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 747 | static long tce_iommu_create_default_window(struct tce_container *container) |
| 748 | { |
| 749 | long ret; |
| 750 | __u64 start_addr = 0; |
| 751 | struct tce_iommu_group *tcegrp; |
| 752 | struct iommu_table_group *table_group; |
| 753 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 754 | if (!container->def_window_pending) |
| 755 | return 0; |
| 756 | |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 757 | if (!tce_groups_attached(container)) |
| 758 | return -ENODEV; |
| 759 | |
| 760 | tcegrp = list_first_entry(&container->group_list, |
| 761 | struct tce_iommu_group, next); |
| 762 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
| 763 | if (!table_group) |
| 764 | return -ENODEV; |
| 765 | |
| 766 | ret = tce_iommu_create_window(container, IOMMU_PAGE_SHIFT_4K, |
| 767 | table_group->tce32_size, 1, &start_addr); |
| 768 | WARN_ON_ONCE(!ret && start_addr); |
| 769 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 770 | if (!ret) |
| 771 | container->def_window_pending = false; |
| 772 | |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 773 | return ret; |
| 774 | } |
| 775 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 776 | static long tce_iommu_ioctl(void *iommu_data, |
| 777 | unsigned int cmd, unsigned long arg) |
| 778 | { |
| 779 | struct tce_container *container = iommu_data; |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 780 | unsigned long minsz, ddwsz; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 781 | long ret; |
| 782 | |
| 783 | switch (cmd) { |
| 784 | case VFIO_CHECK_EXTENSION: |
Gavin Shan | 1b69be5 | 2014-06-10 11:41:57 +1000 | [diff] [blame] | 785 | switch (arg) { |
| 786 | case VFIO_SPAPR_TCE_IOMMU: |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 787 | case VFIO_SPAPR_TCE_v2_IOMMU: |
Gavin Shan | 1b69be5 | 2014-06-10 11:41:57 +1000 | [diff] [blame] | 788 | ret = 1; |
| 789 | break; |
| 790 | default: |
| 791 | ret = vfio_spapr_iommu_eeh_ioctl(NULL, cmd, arg); |
| 792 | break; |
| 793 | } |
| 794 | |
| 795 | return (ret < 0) ? 0 : ret; |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 796 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 797 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 798 | /* |
| 799 | * Sanity check to prevent one userspace from manipulating |
| 800 | * another userspace mm. |
| 801 | */ |
| 802 | BUG_ON(!container); |
| 803 | if (container->mm && container->mm != current->mm) |
| 804 | return -EPERM; |
| 805 | |
| 806 | switch (cmd) { |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 807 | case VFIO_IOMMU_SPAPR_TCE_GET_INFO: { |
| 808 | struct vfio_iommu_spapr_tce_info info; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 809 | struct tce_iommu_group *tcegrp; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 810 | struct iommu_table_group *table_group; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 811 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 812 | if (!tce_groups_attached(container)) |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 813 | return -ENXIO; |
| 814 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 815 | tcegrp = list_first_entry(&container->group_list, |
| 816 | struct tce_iommu_group, next); |
| 817 | table_group = iommu_group_get_iommudata(tcegrp->grp); |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 818 | |
Alexey Kardashevskiy | 4793d65 | 2015-06-05 16:35:20 +1000 | [diff] [blame] | 819 | if (!table_group) |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 820 | return -ENXIO; |
| 821 | |
| 822 | minsz = offsetofend(struct vfio_iommu_spapr_tce_info, |
| 823 | dma32_window_size); |
| 824 | |
| 825 | if (copy_from_user(&info, (void __user *)arg, minsz)) |
| 826 | return -EFAULT; |
| 827 | |
| 828 | if (info.argsz < minsz) |
| 829 | return -EINVAL; |
| 830 | |
Alexey Kardashevskiy | 4793d65 | 2015-06-05 16:35:20 +1000 | [diff] [blame] | 831 | info.dma32_window_start = table_group->tce32_start; |
| 832 | info.dma32_window_size = table_group->tce32_size; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 833 | info.flags = 0; |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 834 | memset(&info.ddw, 0, sizeof(info.ddw)); |
| 835 | |
| 836 | if (table_group->max_dynamic_windows_supported && |
| 837 | container->v2) { |
| 838 | info.flags |= VFIO_IOMMU_SPAPR_INFO_DDW; |
| 839 | info.ddw.pgsizes = table_group->pgsizes; |
| 840 | info.ddw.max_dynamic_windows_supported = |
| 841 | table_group->max_dynamic_windows_supported; |
| 842 | info.ddw.levels = table_group->max_levels; |
| 843 | } |
| 844 | |
| 845 | ddwsz = offsetofend(struct vfio_iommu_spapr_tce_info, ddw); |
| 846 | |
| 847 | if (info.argsz >= ddwsz) |
| 848 | minsz = ddwsz; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 849 | |
| 850 | if (copy_to_user((void __user *)arg, &info, minsz)) |
| 851 | return -EFAULT; |
| 852 | |
| 853 | return 0; |
| 854 | } |
| 855 | case VFIO_IOMMU_MAP_DMA: { |
| 856 | struct vfio_iommu_type1_dma_map param; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 857 | struct iommu_table *tbl = NULL; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 858 | long num; |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 859 | enum dma_data_direction direction; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 860 | |
Alexey Kardashevskiy | 3c56e82 | 2015-06-05 16:35:02 +1000 | [diff] [blame] | 861 | if (!container->enabled) |
| 862 | return -EPERM; |
| 863 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 864 | minsz = offsetofend(struct vfio_iommu_type1_dma_map, size); |
| 865 | |
| 866 | if (copy_from_user(¶m, (void __user *)arg, minsz)) |
| 867 | return -EFAULT; |
| 868 | |
| 869 | if (param.argsz < minsz) |
| 870 | return -EINVAL; |
| 871 | |
| 872 | if (param.flags & ~(VFIO_DMA_MAP_FLAG_READ | |
| 873 | VFIO_DMA_MAP_FLAG_WRITE)) |
| 874 | return -EINVAL; |
| 875 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 876 | ret = tce_iommu_create_default_window(container); |
| 877 | if (ret) |
| 878 | return ret; |
| 879 | |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 880 | num = tce_iommu_find_table(container, param.iova, &tbl); |
| 881 | if (num < 0) |
| 882 | return -ENXIO; |
| 883 | |
Alexey Kardashevskiy | 00663d4 | 2015-06-05 16:35:00 +1000 | [diff] [blame] | 884 | if ((param.size & ~IOMMU_PAGE_MASK(tbl)) || |
| 885 | (param.vaddr & ~IOMMU_PAGE_MASK(tbl))) |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 886 | return -EINVAL; |
| 887 | |
| 888 | /* iova is checked by the IOMMU API */ |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 889 | if (param.flags & VFIO_DMA_MAP_FLAG_READ) { |
| 890 | if (param.flags & VFIO_DMA_MAP_FLAG_WRITE) |
| 891 | direction = DMA_BIDIRECTIONAL; |
| 892 | else |
| 893 | direction = DMA_TO_DEVICE; |
| 894 | } else { |
| 895 | if (param.flags & VFIO_DMA_MAP_FLAG_WRITE) |
| 896 | direction = DMA_FROM_DEVICE; |
| 897 | else |
| 898 | return -EINVAL; |
| 899 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 900 | |
Alexey Kardashevskiy | 05c6cfb | 2015-06-05 16:35:15 +1000 | [diff] [blame] | 901 | ret = iommu_tce_put_param_check(tbl, param.iova, param.vaddr); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 902 | if (ret) |
| 903 | return ret; |
| 904 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 905 | if (container->v2) |
| 906 | ret = tce_iommu_build_v2(container, tbl, |
| 907 | param.iova >> tbl->it_page_shift, |
| 908 | param.vaddr, |
| 909 | param.size >> tbl->it_page_shift, |
| 910 | direction); |
| 911 | else |
| 912 | ret = tce_iommu_build(container, tbl, |
| 913 | param.iova >> tbl->it_page_shift, |
| 914 | param.vaddr, |
| 915 | param.size >> tbl->it_page_shift, |
| 916 | direction); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 917 | |
| 918 | iommu_flush_tce(tbl); |
| 919 | |
| 920 | return ret; |
| 921 | } |
| 922 | case VFIO_IOMMU_UNMAP_DMA: { |
| 923 | struct vfio_iommu_type1_dma_unmap param; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 924 | struct iommu_table *tbl = NULL; |
| 925 | long num; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 926 | |
Alexey Kardashevskiy | 3c56e82 | 2015-06-05 16:35:02 +1000 | [diff] [blame] | 927 | if (!container->enabled) |
| 928 | return -EPERM; |
| 929 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 930 | minsz = offsetofend(struct vfio_iommu_type1_dma_unmap, |
| 931 | size); |
| 932 | |
| 933 | if (copy_from_user(¶m, (void __user *)arg, minsz)) |
| 934 | return -EFAULT; |
| 935 | |
| 936 | if (param.argsz < minsz) |
| 937 | return -EINVAL; |
| 938 | |
| 939 | /* No flag is supported now */ |
| 940 | if (param.flags) |
| 941 | return -EINVAL; |
| 942 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 943 | ret = tce_iommu_create_default_window(container); |
| 944 | if (ret) |
| 945 | return ret; |
| 946 | |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 947 | num = tce_iommu_find_table(container, param.iova, &tbl); |
| 948 | if (num < 0) |
| 949 | return -ENXIO; |
| 950 | |
Alexey Kardashevskiy | 00663d4 | 2015-06-05 16:35:00 +1000 | [diff] [blame] | 951 | if (param.size & ~IOMMU_PAGE_MASK(tbl)) |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 952 | return -EINVAL; |
| 953 | |
| 954 | ret = iommu_tce_clear_param_check(tbl, param.iova, 0, |
Alexey Kardashevskiy | 00663d4 | 2015-06-05 16:35:00 +1000 | [diff] [blame] | 955 | param.size >> tbl->it_page_shift); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 956 | if (ret) |
| 957 | return ret; |
| 958 | |
Alexey Kardashevskiy | 9b14a1f | 2015-06-05 16:34:58 +1000 | [diff] [blame] | 959 | ret = tce_iommu_clear(container, tbl, |
Alexey Kardashevskiy | 00663d4 | 2015-06-05 16:35:00 +1000 | [diff] [blame] | 960 | param.iova >> tbl->it_page_shift, |
| 961 | param.size >> tbl->it_page_shift); |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 962 | iommu_flush_tce(tbl); |
| 963 | |
| 964 | return ret; |
| 965 | } |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 966 | case VFIO_IOMMU_SPAPR_REGISTER_MEMORY: { |
| 967 | struct vfio_iommu_spapr_register_memory param; |
| 968 | |
| 969 | if (!container->v2) |
| 970 | break; |
| 971 | |
| 972 | minsz = offsetofend(struct vfio_iommu_spapr_register_memory, |
| 973 | size); |
| 974 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 975 | ret = tce_iommu_mm_set(container); |
| 976 | if (ret) |
| 977 | return ret; |
| 978 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 979 | if (copy_from_user(¶m, (void __user *)arg, minsz)) |
| 980 | return -EFAULT; |
| 981 | |
| 982 | if (param.argsz < minsz) |
| 983 | return -EINVAL; |
| 984 | |
| 985 | /* No flag is supported now */ |
| 986 | if (param.flags) |
| 987 | return -EINVAL; |
| 988 | |
| 989 | mutex_lock(&container->lock); |
| 990 | ret = tce_iommu_register_pages(container, param.vaddr, |
| 991 | param.size); |
| 992 | mutex_unlock(&container->lock); |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | case VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY: { |
| 997 | struct vfio_iommu_spapr_register_memory param; |
| 998 | |
| 999 | if (!container->v2) |
| 1000 | break; |
| 1001 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 1002 | if (!container->mm) |
| 1003 | return -EPERM; |
| 1004 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1005 | minsz = offsetofend(struct vfio_iommu_spapr_register_memory, |
| 1006 | size); |
| 1007 | |
| 1008 | if (copy_from_user(¶m, (void __user *)arg, minsz)) |
| 1009 | return -EFAULT; |
| 1010 | |
| 1011 | if (param.argsz < minsz) |
| 1012 | return -EINVAL; |
| 1013 | |
| 1014 | /* No flag is supported now */ |
| 1015 | if (param.flags) |
| 1016 | return -EINVAL; |
| 1017 | |
| 1018 | mutex_lock(&container->lock); |
| 1019 | ret = tce_iommu_unregister_pages(container, param.vaddr, |
| 1020 | param.size); |
| 1021 | mutex_unlock(&container->lock); |
| 1022 | |
| 1023 | return ret; |
| 1024 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1025 | case VFIO_IOMMU_ENABLE: |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1026 | if (container->v2) |
| 1027 | break; |
| 1028 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1029 | mutex_lock(&container->lock); |
| 1030 | ret = tce_iommu_enable(container); |
| 1031 | mutex_unlock(&container->lock); |
| 1032 | return ret; |
| 1033 | |
| 1034 | |
| 1035 | case VFIO_IOMMU_DISABLE: |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1036 | if (container->v2) |
| 1037 | break; |
| 1038 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1039 | mutex_lock(&container->lock); |
| 1040 | tce_iommu_disable(container); |
| 1041 | mutex_unlock(&container->lock); |
| 1042 | return 0; |
Gavin Shan | 1b69be5 | 2014-06-10 11:41:57 +1000 | [diff] [blame] | 1043 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1044 | case VFIO_EEH_PE_OP: { |
| 1045 | struct tce_iommu_group *tcegrp; |
| 1046 | |
| 1047 | ret = 0; |
| 1048 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 1049 | ret = vfio_spapr_iommu_eeh_ioctl(tcegrp->grp, |
| 1050 | cmd, arg); |
| 1051 | if (ret) |
| 1052 | return ret; |
| 1053 | } |
| 1054 | return ret; |
| 1055 | } |
| 1056 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 1057 | case VFIO_IOMMU_SPAPR_TCE_CREATE: { |
| 1058 | struct vfio_iommu_spapr_tce_create create; |
| 1059 | |
| 1060 | if (!container->v2) |
| 1061 | break; |
| 1062 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 1063 | ret = tce_iommu_mm_set(container); |
| 1064 | if (ret) |
| 1065 | return ret; |
| 1066 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 1067 | if (!tce_groups_attached(container)) |
| 1068 | return -ENXIO; |
| 1069 | |
| 1070 | minsz = offsetofend(struct vfio_iommu_spapr_tce_create, |
| 1071 | start_addr); |
| 1072 | |
| 1073 | if (copy_from_user(&create, (void __user *)arg, minsz)) |
| 1074 | return -EFAULT; |
| 1075 | |
| 1076 | if (create.argsz < minsz) |
| 1077 | return -EINVAL; |
| 1078 | |
| 1079 | if (create.flags) |
| 1080 | return -EINVAL; |
| 1081 | |
| 1082 | mutex_lock(&container->lock); |
| 1083 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 1084 | ret = tce_iommu_create_default_window(container); |
Alexey Kardashevskiy | 2da64d2 | 2017-02-01 14:26:16 +1100 | [diff] [blame] | 1085 | if (!ret) |
| 1086 | ret = tce_iommu_create_window(container, |
| 1087 | create.page_shift, |
| 1088 | create.window_size, create.levels, |
| 1089 | &create.start_addr); |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 1090 | |
| 1091 | mutex_unlock(&container->lock); |
| 1092 | |
| 1093 | if (!ret && copy_to_user((void __user *)arg, &create, minsz)) |
| 1094 | ret = -EFAULT; |
| 1095 | |
| 1096 | return ret; |
| 1097 | } |
| 1098 | case VFIO_IOMMU_SPAPR_TCE_REMOVE: { |
| 1099 | struct vfio_iommu_spapr_tce_remove remove; |
| 1100 | |
| 1101 | if (!container->v2) |
| 1102 | break; |
| 1103 | |
Alexey Kardashevskiy | bc82d12 | 2016-11-30 17:52:04 +1100 | [diff] [blame] | 1104 | ret = tce_iommu_mm_set(container); |
| 1105 | if (ret) |
| 1106 | return ret; |
| 1107 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 1108 | if (!tce_groups_attached(container)) |
| 1109 | return -ENXIO; |
| 1110 | |
| 1111 | minsz = offsetofend(struct vfio_iommu_spapr_tce_remove, |
| 1112 | start_addr); |
| 1113 | |
| 1114 | if (copy_from_user(&remove, (void __user *)arg, minsz)) |
| 1115 | return -EFAULT; |
| 1116 | |
| 1117 | if (remove.argsz < minsz) |
| 1118 | return -EINVAL; |
| 1119 | |
| 1120 | if (remove.flags) |
| 1121 | return -EINVAL; |
| 1122 | |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 1123 | if (container->def_window_pending && !remove.start_addr) { |
| 1124 | container->def_window_pending = false; |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
Alexey Kardashevskiy | e633bc8 | 2015-06-05 16:35:26 +1000 | [diff] [blame] | 1128 | mutex_lock(&container->lock); |
| 1129 | |
| 1130 | ret = tce_iommu_remove_window(container, remove.start_addr); |
| 1131 | |
| 1132 | mutex_unlock(&container->lock); |
| 1133 | |
| 1134 | return ret; |
| 1135 | } |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1136 | } |
| 1137 | |
| 1138 | return -ENOTTY; |
| 1139 | } |
| 1140 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1141 | static void tce_iommu_release_ownership(struct tce_container *container, |
| 1142 | struct iommu_table_group *table_group) |
| 1143 | { |
| 1144 | int i; |
| 1145 | |
| 1146 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1147 | struct iommu_table *tbl = container->tables[i]; |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1148 | |
| 1149 | if (!tbl) |
| 1150 | continue; |
| 1151 | |
| 1152 | tce_iommu_clear(container, tbl, tbl->it_offset, tbl->it_size); |
| 1153 | if (tbl->it_map) |
| 1154 | iommu_release_ownership(tbl); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1155 | |
| 1156 | container->tables[i] = NULL; |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | static int tce_iommu_take_ownership(struct tce_container *container, |
| 1161 | struct iommu_table_group *table_group) |
| 1162 | { |
| 1163 | int i, j, rc = 0; |
| 1164 | |
| 1165 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
| 1166 | struct iommu_table *tbl = table_group->tables[i]; |
| 1167 | |
| 1168 | if (!tbl || !tbl->it_map) |
| 1169 | continue; |
| 1170 | |
Alexey Kardashevskiy | 39701e5 | 2016-11-30 17:52:01 +1100 | [diff] [blame] | 1171 | rc = iommu_take_ownership(tbl); |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1172 | if (rc) { |
| 1173 | for (j = 0; j < i; ++j) |
| 1174 | iommu_release_ownership( |
| 1175 | table_group->tables[j]); |
| 1176 | |
| 1177 | return rc; |
| 1178 | } |
| 1179 | } |
| 1180 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1181 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) |
| 1182 | container->tables[i] = table_group->tables[i]; |
| 1183 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1184 | return 0; |
| 1185 | } |
| 1186 | |
| 1187 | static void tce_iommu_release_ownership_ddw(struct tce_container *container, |
| 1188 | struct iommu_table_group *table_group) |
| 1189 | { |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 1190 | long i; |
| 1191 | |
| 1192 | if (!table_group->ops->unset_window) { |
| 1193 | WARN_ON_ONCE(1); |
| 1194 | return; |
| 1195 | } |
| 1196 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1197 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) |
Alexey Kardashevskiy | a390685 | 2019-02-11 18:49:17 +1100 | [diff] [blame] | 1198 | if (container->tables[i]) |
| 1199 | table_group->ops->unset_window(table_group, i); |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 1200 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1201 | table_group->ops->release_ownership(table_group); |
| 1202 | } |
| 1203 | |
| 1204 | static long tce_iommu_take_ownership_ddw(struct tce_container *container, |
| 1205 | struct iommu_table_group *table_group) |
| 1206 | { |
Alexey Kardashevskiy | 930a42d | 2017-02-07 17:26:57 +1100 | [diff] [blame] | 1207 | long i, ret = 0; |
| 1208 | |
Alexey Kardashevskiy | 46d3e1e | 2015-06-05 16:35:23 +1000 | [diff] [blame] | 1209 | if (!table_group->ops->create_table || !table_group->ops->set_window || |
| 1210 | !table_group->ops->release_ownership) { |
| 1211 | WARN_ON_ONCE(1); |
| 1212 | return -EFAULT; |
| 1213 | } |
| 1214 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1215 | table_group->ops->take_ownership(table_group); |
| 1216 | |
Alexey Kardashevskiy | 930a42d | 2017-02-07 17:26:57 +1100 | [diff] [blame] | 1217 | /* Set all windows to the new group */ |
| 1218 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { |
| 1219 | struct iommu_table *tbl = container->tables[i]; |
| 1220 | |
| 1221 | if (!tbl) |
| 1222 | continue; |
| 1223 | |
| 1224 | ret = table_group->ops->set_window(table_group, i, tbl); |
| 1225 | if (ret) |
| 1226 | goto release_exit; |
| 1227 | } |
| 1228 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1229 | return 0; |
Alexey Kardashevskiy | 930a42d | 2017-02-07 17:26:57 +1100 | [diff] [blame] | 1230 | |
| 1231 | release_exit: |
| 1232 | for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) |
| 1233 | table_group->ops->unset_window(table_group, i); |
| 1234 | |
| 1235 | table_group->ops->release_ownership(table_group); |
| 1236 | |
| 1237 | return ret; |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1238 | } |
| 1239 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1240 | static int tce_iommu_attach_group(void *iommu_data, |
| 1241 | struct iommu_group *iommu_group) |
| 1242 | { |
Alexey Kardashevskiy | 78becab | 2019-08-19 11:51:17 +1000 | [diff] [blame] | 1243 | int ret = 0; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1244 | struct tce_container *container = iommu_data; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 1245 | struct iommu_table_group *table_group; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1246 | struct tce_iommu_group *tcegrp = NULL; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1247 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1248 | mutex_lock(&container->lock); |
| 1249 | |
| 1250 | /* pr_debug("tce_vfio: Attaching group #%u to iommu %p\n", |
| 1251 | iommu_group_id(iommu_group), iommu_group); */ |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 1252 | table_group = iommu_group_get_iommudata(iommu_group); |
Greg Kurz | bd00fdf | 2017-01-24 17:50:26 +0100 | [diff] [blame] | 1253 | if (!table_group) { |
| 1254 | ret = -ENODEV; |
| 1255 | goto unlock_exit; |
| 1256 | } |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1257 | |
| 1258 | if (tce_groups_attached(container) && (!table_group->ops || |
| 1259 | !table_group->ops->take_ownership || |
| 1260 | !table_group->ops->release_ownership)) { |
| 1261 | ret = -EBUSY; |
| 1262 | goto unlock_exit; |
| 1263 | } |
| 1264 | |
| 1265 | /* Check if new group has the same iommu_ops (i.e. compatible) */ |
| 1266 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 1267 | struct iommu_table_group *table_group_tmp; |
| 1268 | |
| 1269 | if (tcegrp->grp == iommu_group) { |
| 1270 | pr_warn("tce_vfio: Group %d is already attached\n", |
| 1271 | iommu_group_id(iommu_group)); |
| 1272 | ret = -EBUSY; |
| 1273 | goto unlock_exit; |
| 1274 | } |
| 1275 | table_group_tmp = iommu_group_get_iommudata(tcegrp->grp); |
Alexey Kardashevskiy | 54de285 | 2016-04-29 18:55:15 +1000 | [diff] [blame] | 1276 | if (table_group_tmp->ops->create_table != |
| 1277 | table_group->ops->create_table) { |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1278 | pr_warn("tce_vfio: Group %d is incompatible with group %d\n", |
| 1279 | iommu_group_id(iommu_group), |
| 1280 | iommu_group_id(tcegrp->grp)); |
| 1281 | ret = -EPERM; |
| 1282 | goto unlock_exit; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | tcegrp = kzalloc(sizeof(*tcegrp), GFP_KERNEL); |
| 1287 | if (!tcegrp) { |
| 1288 | ret = -ENOMEM; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 1289 | goto unlock_exit; |
| 1290 | } |
| 1291 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1292 | if (!table_group->ops || !table_group->ops->take_ownership || |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 1293 | !table_group->ops->release_ownership) { |
Alexey Kardashevskiy | 1282ba7 | 2017-03-24 17:44:06 +1100 | [diff] [blame] | 1294 | if (container->v2) { |
| 1295 | ret = -EPERM; |
Alexey Kardashevskiy | 78becab | 2019-08-19 11:51:17 +1000 | [diff] [blame] | 1296 | goto free_exit; |
Alexey Kardashevskiy | 1282ba7 | 2017-03-24 17:44:06 +1100 | [diff] [blame] | 1297 | } |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1298 | ret = tce_iommu_take_ownership(container, table_group); |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 1299 | } else { |
Alexey Kardashevskiy | 1282ba7 | 2017-03-24 17:44:06 +1100 | [diff] [blame] | 1300 | if (!container->v2) { |
| 1301 | ret = -EPERM; |
Alexey Kardashevskiy | 78becab | 2019-08-19 11:51:17 +1000 | [diff] [blame] | 1302 | goto free_exit; |
Alexey Kardashevskiy | 1282ba7 | 2017-03-24 17:44:06 +1100 | [diff] [blame] | 1303 | } |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1304 | ret = tce_iommu_take_ownership_ddw(container, table_group); |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 1305 | if (!tce_groups_attached(container) && !container->tables[0]) |
Alexey Kardashevskiy | d9c7289 | 2016-11-30 17:52:03 +1100 | [diff] [blame] | 1306 | container->def_window_pending = true; |
Alexey Kardashevskiy | 6f01cc6 | 2016-11-30 17:52:02 +1100 | [diff] [blame] | 1307 | } |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1308 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1309 | if (!ret) { |
| 1310 | tcegrp->grp = iommu_group; |
| 1311 | list_add(&tcegrp->next, &container->group_list); |
| 1312 | } |
Alexey Kardashevskiy | 22af485 | 2015-06-05 16:35:04 +1000 | [diff] [blame] | 1313 | |
Alexey Kardashevskiy | 78becab | 2019-08-19 11:51:17 +1000 | [diff] [blame] | 1314 | free_exit: |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1315 | if (ret && tcegrp) |
| 1316 | kfree(tcegrp); |
| 1317 | |
Alexey Kardashevskiy | 78becab | 2019-08-19 11:51:17 +1000 | [diff] [blame] | 1318 | unlock_exit: |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1319 | mutex_unlock(&container->lock); |
| 1320 | |
| 1321 | return ret; |
| 1322 | } |
| 1323 | |
| 1324 | static void tce_iommu_detach_group(void *iommu_data, |
| 1325 | struct iommu_group *iommu_group) |
| 1326 | { |
| 1327 | struct tce_container *container = iommu_data; |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 1328 | struct iommu_table_group *table_group; |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1329 | bool found = false; |
| 1330 | struct tce_iommu_group *tcegrp; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1331 | |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1332 | mutex_lock(&container->lock); |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1333 | |
| 1334 | list_for_each_entry(tcegrp, &container->group_list, next) { |
| 1335 | if (tcegrp->grp == iommu_group) { |
| 1336 | found = true; |
| 1337 | break; |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | if (!found) { |
| 1342 | pr_warn("tce_vfio: detaching unattached group #%u\n", |
| 1343 | iommu_group_id(iommu_group)); |
Alexey Kardashevskiy | 22af485 | 2015-06-05 16:35:04 +1000 | [diff] [blame] | 1344 | goto unlock_exit; |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1345 | } |
Alexey Kardashevskiy | 22af485 | 2015-06-05 16:35:04 +1000 | [diff] [blame] | 1346 | |
Alexey Kardashevskiy | 2157e7b | 2015-06-05 16:35:25 +1000 | [diff] [blame] | 1347 | list_del(&tcegrp->next); |
| 1348 | kfree(tcegrp); |
Alexey Kardashevskiy | 0eaf4de | 2015-06-05 16:35:09 +1000 | [diff] [blame] | 1349 | |
| 1350 | table_group = iommu_group_get_iommudata(iommu_group); |
| 1351 | BUG_ON(!table_group); |
| 1352 | |
Alexey Kardashevskiy | f87a886 | 2015-06-05 16:35:10 +1000 | [diff] [blame] | 1353 | if (!table_group->ops || !table_group->ops->release_ownership) |
| 1354 | tce_iommu_release_ownership(container, table_group); |
| 1355 | else |
| 1356 | tce_iommu_release_ownership_ddw(container, table_group); |
Alexey Kardashevskiy | 22af485 | 2015-06-05 16:35:04 +1000 | [diff] [blame] | 1357 | |
| 1358 | unlock_exit: |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1359 | mutex_unlock(&container->lock); |
| 1360 | } |
| 1361 | |
Wang Hai | e39dd51 | 2019-04-03 12:36:21 -0600 | [diff] [blame] | 1362 | static const struct vfio_iommu_driver_ops tce_iommu_driver_ops = { |
Alexey Kardashevskiy | 5ffd229 | 2013-05-21 13:33:10 +1000 | [diff] [blame] | 1363 | .name = "iommu-vfio-powerpc", |
| 1364 | .owner = THIS_MODULE, |
| 1365 | .open = tce_iommu_open, |
| 1366 | .release = tce_iommu_release, |
| 1367 | .ioctl = tce_iommu_ioctl, |
| 1368 | .attach_group = tce_iommu_attach_group, |
| 1369 | .detach_group = tce_iommu_detach_group, |
| 1370 | }; |
| 1371 | |
| 1372 | static int __init tce_iommu_init(void) |
| 1373 | { |
| 1374 | return vfio_register_iommu_driver(&tce_iommu_driver_ops); |
| 1375 | } |
| 1376 | |
| 1377 | static void __exit tce_iommu_cleanup(void) |
| 1378 | { |
| 1379 | vfio_unregister_iommu_driver(&tce_iommu_driver_ops); |
| 1380 | } |
| 1381 | |
| 1382 | module_init(tce_iommu_init); |
| 1383 | module_exit(tce_iommu_cleanup); |
| 1384 | |
| 1385 | MODULE_VERSION(DRIVER_VERSION); |
| 1386 | MODULE_LICENSE("GPL v2"); |
| 1387 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1388 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1389 | |