Hareesh Gundu | 525f63e | 2019-09-18 13:35:26 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2002,2007-2019, The Linux Foundation. All rights reserved. |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/export.h> |
| 15 | #include <linux/vmalloc.h> |
| 16 | #include <asm/cacheflush.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/kmemleak.h> |
| 19 | #include <linux/highmem.h> |
| 20 | #include <linux/scatterlist.h> |
| 21 | #include <soc/qcom/scm.h> |
| 22 | #include <soc/qcom/secure_buffer.h> |
Deepak Kumar | f1ffe20 | 2017-06-21 13:12:33 +0530 | [diff] [blame] | 23 | #include <linux/ratelimit.h> |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 24 | |
| 25 | #include "kgsl.h" |
| 26 | #include "kgsl_sharedmem.h" |
| 27 | #include "kgsl_device.h" |
| 28 | #include "kgsl_log.h" |
| 29 | #include "kgsl_mmu.h" |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 30 | |
| 31 | /* |
| 32 | * The user can set this from debugfs to force failed memory allocations to |
| 33 | * fail without trying OOM first. This is a debug setting useful for |
| 34 | * stress applications that want to test failure cases without pushing the |
| 35 | * system into unrecoverable OOM panics |
| 36 | */ |
| 37 | |
| 38 | static bool sharedmem_noretry_flag; |
| 39 | |
| 40 | static DEFINE_MUTEX(kernel_map_global_lock); |
| 41 | |
| 42 | struct cp2_mem_chunks { |
| 43 | unsigned int chunk_list; |
| 44 | unsigned int chunk_list_size; |
| 45 | unsigned int chunk_size; |
| 46 | } __attribute__ ((__packed__)); |
| 47 | |
| 48 | struct cp2_lock_req { |
| 49 | struct cp2_mem_chunks chunks; |
| 50 | unsigned int mem_usage; |
| 51 | unsigned int lock; |
| 52 | } __attribute__ ((__packed__)); |
| 53 | |
| 54 | #define MEM_PROTECT_LOCK_ID2 0x0A |
| 55 | #define MEM_PROTECT_LOCK_ID2_FLAT 0x11 |
| 56 | |
| 57 | /* An attribute for showing per-process memory statistics */ |
| 58 | struct kgsl_mem_entry_attribute { |
| 59 | struct attribute attr; |
| 60 | int memtype; |
| 61 | ssize_t (*show)(struct kgsl_process_private *priv, |
| 62 | int type, char *buf); |
| 63 | }; |
| 64 | |
| 65 | #define to_mem_entry_attr(a) \ |
| 66 | container_of(a, struct kgsl_mem_entry_attribute, attr) |
| 67 | |
| 68 | #define __MEM_ENTRY_ATTR(_type, _name, _show) \ |
| 69 | { \ |
| 70 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
| 71 | .memtype = _type, \ |
| 72 | .show = _show, \ |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * A structure to hold the attributes for a particular memory type. |
| 77 | * For each memory type in each process we store the current and maximum |
| 78 | * memory usage and display the counts in sysfs. This structure and |
| 79 | * the following macro allow us to simplify the definition for those |
| 80 | * adding new memory types |
| 81 | */ |
| 82 | |
| 83 | struct mem_entry_stats { |
| 84 | int memtype; |
| 85 | struct kgsl_mem_entry_attribute attr; |
| 86 | struct kgsl_mem_entry_attribute max_attr; |
| 87 | }; |
| 88 | |
| 89 | |
| 90 | #define MEM_ENTRY_STAT(_type, _name) \ |
| 91 | { \ |
| 92 | .memtype = _type, \ |
| 93 | .attr = __MEM_ENTRY_ATTR(_type, _name, mem_entry_show), \ |
| 94 | .max_attr = __MEM_ENTRY_ATTR(_type, _name##_max, \ |
| 95 | mem_entry_max_show), \ |
| 96 | } |
| 97 | |
| 98 | static void kgsl_cma_unlock_secure(struct kgsl_memdesc *memdesc); |
| 99 | |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 100 | static ssize_t |
| 101 | imported_mem_show(struct kgsl_process_private *priv, |
| 102 | int type, char *buf) |
| 103 | { |
| 104 | struct kgsl_mem_entry *entry; |
| 105 | uint64_t imported_mem = 0; |
| 106 | int id = 0; |
| 107 | |
| 108 | spin_lock(&priv->mem_lock); |
| 109 | for (entry = idr_get_next(&priv->mem_idr, &id); entry; |
| 110 | id++, entry = idr_get_next(&priv->mem_idr, &id)) { |
| 111 | |
| 112 | int egl_surface_count = 0, egl_image_count = 0; |
Deepak Kumar | 2df1522 | 2018-05-15 10:09:29 +0530 | [diff] [blame] | 113 | struct kgsl_memdesc *m = &entry->memdesc; |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 114 | |
Deepak Kumar | 2df1522 | 2018-05-15 10:09:29 +0530 | [diff] [blame] | 115 | if ((kgsl_memdesc_usermem_type(m) != KGSL_MEM_ENTRY_ION) || |
| 116 | entry->pending_free || (kgsl_mem_entry_get(entry) == 0)) |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 117 | continue; |
| 118 | spin_unlock(&priv->mem_lock); |
| 119 | |
Deepak Kumar | 2df1522 | 2018-05-15 10:09:29 +0530 | [diff] [blame] | 120 | kgsl_get_egl_counts(entry, &egl_surface_count, |
| 121 | &egl_image_count); |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 122 | |
Deepak Kumar | 2df1522 | 2018-05-15 10:09:29 +0530 | [diff] [blame] | 123 | if (kgsl_memdesc_get_memtype(m) == |
| 124 | KGSL_MEMTYPE_EGL_SURFACE) |
| 125 | imported_mem += m->size; |
| 126 | else if (egl_surface_count == 0) { |
| 127 | uint64_t size = m->size; |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 128 | |
Deepak Kumar | 2df1522 | 2018-05-15 10:09:29 +0530 | [diff] [blame] | 129 | do_div(size, (egl_image_count ? |
| 130 | egl_image_count : 1)); |
| 131 | imported_mem += size; |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | kgsl_mem_entry_put(entry); |
| 135 | spin_lock(&priv->mem_lock); |
| 136 | } |
| 137 | spin_unlock(&priv->mem_lock); |
| 138 | |
| 139 | return scnprintf(buf, PAGE_SIZE, "%llu\n", imported_mem); |
| 140 | } |
| 141 | |
| 142 | static ssize_t |
| 143 | gpumem_mapped_show(struct kgsl_process_private *priv, |
| 144 | int type, char *buf) |
| 145 | { |
| 146 | return scnprintf(buf, PAGE_SIZE, "%llu\n", |
| 147 | priv->gpumem_mapped); |
| 148 | } |
| 149 | |
| 150 | static ssize_t |
| 151 | gpumem_unmapped_show(struct kgsl_process_private *priv, int type, char *buf) |
| 152 | { |
| 153 | if (priv->gpumem_mapped > priv->stats[type].cur) |
| 154 | return -EIO; |
| 155 | |
| 156 | return scnprintf(buf, PAGE_SIZE, "%llu\n", |
| 157 | priv->stats[type].cur - priv->gpumem_mapped); |
| 158 | } |
| 159 | |
| 160 | static struct kgsl_mem_entry_attribute debug_memstats[] = { |
| 161 | __MEM_ENTRY_ATTR(0, imported_mem, imported_mem_show), |
| 162 | __MEM_ENTRY_ATTR(0, gpumem_mapped, gpumem_mapped_show), |
| 163 | __MEM_ENTRY_ATTR(KGSL_MEM_ENTRY_KERNEL, gpumem_unmapped, |
| 164 | gpumem_unmapped_show), |
| 165 | }; |
| 166 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 167 | /** |
| 168 | * Show the current amount of memory allocated for the given memtype |
| 169 | */ |
| 170 | |
| 171 | static ssize_t |
| 172 | mem_entry_show(struct kgsl_process_private *priv, int type, char *buf) |
| 173 | { |
| 174 | return snprintf(buf, PAGE_SIZE, "%llu\n", priv->stats[type].cur); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Show the maximum memory allocated for the given memtype through the life of |
| 179 | * the process |
| 180 | */ |
| 181 | |
| 182 | static ssize_t |
| 183 | mem_entry_max_show(struct kgsl_process_private *priv, int type, char *buf) |
| 184 | { |
| 185 | return snprintf(buf, PAGE_SIZE, "%llu\n", priv->stats[type].max); |
| 186 | } |
| 187 | |
| 188 | static ssize_t mem_entry_sysfs_show(struct kobject *kobj, |
| 189 | struct attribute *attr, char *buf) |
| 190 | { |
| 191 | struct kgsl_mem_entry_attribute *pattr = to_mem_entry_attr(attr); |
| 192 | struct kgsl_process_private *priv; |
| 193 | ssize_t ret; |
| 194 | |
| 195 | /* |
Lynus Vaz | a859063 | 2017-11-15 19:55:01 +0530 | [diff] [blame] | 196 | * kgsl_process_init_sysfs takes a refcount to the process_private, |
| 197 | * which is put when the kobj is released. This implies that priv will |
| 198 | * not be freed until this function completes, and no further locking |
| 199 | * is needed. |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 200 | */ |
| 201 | priv = kobj ? container_of(kobj, struct kgsl_process_private, kobj) : |
| 202 | NULL; |
| 203 | |
| 204 | if (priv && pattr->show) |
| 205 | ret = pattr->show(priv, pattr->memtype, buf); |
| 206 | else |
| 207 | ret = -EIO; |
| 208 | |
| 209 | return ret; |
| 210 | } |
| 211 | |
Lynus Vaz | a859063 | 2017-11-15 19:55:01 +0530 | [diff] [blame] | 212 | static void mem_entry_release(struct kobject *kobj) |
| 213 | { |
| 214 | struct kgsl_process_private *priv; |
| 215 | |
| 216 | priv = container_of(kobj, struct kgsl_process_private, kobj); |
| 217 | /* Put the refcount we got in kgsl_process_init_sysfs */ |
| 218 | kgsl_process_private_put(priv); |
| 219 | } |
| 220 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 221 | static const struct sysfs_ops mem_entry_sysfs_ops = { |
| 222 | .show = mem_entry_sysfs_show, |
| 223 | }; |
| 224 | |
| 225 | static struct kobj_type ktype_mem_entry = { |
| 226 | .sysfs_ops = &mem_entry_sysfs_ops, |
Lynus Vaz | a859063 | 2017-11-15 19:55:01 +0530 | [diff] [blame] | 227 | .release = &mem_entry_release, |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 228 | }; |
| 229 | |
| 230 | static struct mem_entry_stats mem_stats[] = { |
| 231 | MEM_ENTRY_STAT(KGSL_MEM_ENTRY_KERNEL, kernel), |
| 232 | MEM_ENTRY_STAT(KGSL_MEM_ENTRY_USER, user), |
| 233 | #ifdef CONFIG_ION |
| 234 | MEM_ENTRY_STAT(KGSL_MEM_ENTRY_ION, ion), |
| 235 | #endif |
| 236 | }; |
| 237 | |
| 238 | void |
| 239 | kgsl_process_uninit_sysfs(struct kgsl_process_private *private) |
| 240 | { |
| 241 | int i; |
| 242 | |
| 243 | for (i = 0; i < ARRAY_SIZE(mem_stats); i++) { |
| 244 | sysfs_remove_file(&private->kobj, &mem_stats[i].attr.attr); |
| 245 | sysfs_remove_file(&private->kobj, |
| 246 | &mem_stats[i].max_attr.attr); |
| 247 | } |
| 248 | |
| 249 | kobject_put(&private->kobj); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | /** |
| 253 | * kgsl_process_init_sysfs() - Initialize and create sysfs files for a process |
| 254 | * |
| 255 | * @device: Pointer to kgsl device struct |
| 256 | * @private: Pointer to the structure for the process |
| 257 | * |
| 258 | * kgsl_process_init_sysfs() is called at the time of creating the |
| 259 | * process struct when a process opens the kgsl device for the first time. |
| 260 | * This function creates the sysfs files for the process. |
| 261 | */ |
| 262 | void kgsl_process_init_sysfs(struct kgsl_device *device, |
| 263 | struct kgsl_process_private *private) |
| 264 | { |
| 265 | unsigned char name[16]; |
| 266 | int i; |
| 267 | |
| 268 | /* Keep private valid until the sysfs enries are removed. */ |
| 269 | kgsl_process_private_get(private); |
| 270 | |
Archana Sriram | d66ae7b | 2020-10-18 23:34:04 +0530 | [diff] [blame] | 271 | snprintf(name, sizeof(name), "%d", pid_nr(private->pid)); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 272 | |
| 273 | if (kobject_init_and_add(&private->kobj, &ktype_mem_entry, |
| 274 | kgsl_driver.prockobj, name)) { |
| 275 | WARN(1, "Unable to add sysfs dir '%s'\n", name); |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | for (i = 0; i < ARRAY_SIZE(mem_stats); i++) { |
| 280 | if (sysfs_create_file(&private->kobj, |
| 281 | &mem_stats[i].attr.attr)) |
| 282 | WARN(1, "Couldn't create sysfs file '%s'\n", |
| 283 | mem_stats[i].attr.attr.name); |
| 284 | |
| 285 | if (sysfs_create_file(&private->kobj, |
| 286 | &mem_stats[i].max_attr.attr)) |
| 287 | WARN(1, "Couldn't create sysfs file '%s'\n", |
| 288 | mem_stats[i].max_attr.attr.name); |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 289 | } |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 290 | |
Amit Kushwaha | 7c843c2 | 2018-04-09 20:41:14 +0530 | [diff] [blame] | 291 | for (i = 0; i < ARRAY_SIZE(debug_memstats); i++) { |
| 292 | if (sysfs_create_file(&private->kobj, |
| 293 | &debug_memstats[i].attr)) |
| 294 | WARN(1, "Couldn't create sysfs file '%s'\n", |
| 295 | debug_memstats[i].attr.name); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 296 | } |
| 297 | } |
| 298 | |
| 299 | static ssize_t kgsl_drv_memstat_show(struct device *dev, |
| 300 | struct device_attribute *attr, |
| 301 | char *buf) |
| 302 | { |
| 303 | uint64_t val = 0; |
| 304 | |
| 305 | if (!strcmp(attr->attr.name, "vmalloc")) |
| 306 | val = atomic_long_read(&kgsl_driver.stats.vmalloc); |
| 307 | else if (!strcmp(attr->attr.name, "vmalloc_max")) |
| 308 | val = atomic_long_read(&kgsl_driver.stats.vmalloc_max); |
| 309 | else if (!strcmp(attr->attr.name, "page_alloc")) |
| 310 | val = atomic_long_read(&kgsl_driver.stats.page_alloc); |
| 311 | else if (!strcmp(attr->attr.name, "page_alloc_max")) |
| 312 | val = atomic_long_read(&kgsl_driver.stats.page_alloc_max); |
| 313 | else if (!strcmp(attr->attr.name, "coherent")) |
| 314 | val = atomic_long_read(&kgsl_driver.stats.coherent); |
| 315 | else if (!strcmp(attr->attr.name, "coherent_max")) |
| 316 | val = atomic_long_read(&kgsl_driver.stats.coherent_max); |
| 317 | else if (!strcmp(attr->attr.name, "secure")) |
| 318 | val = atomic_long_read(&kgsl_driver.stats.secure); |
| 319 | else if (!strcmp(attr->attr.name, "secure_max")) |
| 320 | val = atomic_long_read(&kgsl_driver.stats.secure_max); |
| 321 | else if (!strcmp(attr->attr.name, "mapped")) |
| 322 | val = atomic_long_read(&kgsl_driver.stats.mapped); |
| 323 | else if (!strcmp(attr->attr.name, "mapped_max")) |
| 324 | val = atomic_long_read(&kgsl_driver.stats.mapped_max); |
| 325 | |
| 326 | return snprintf(buf, PAGE_SIZE, "%llu\n", val); |
| 327 | } |
| 328 | |
| 329 | static ssize_t kgsl_drv_full_cache_threshold_store(struct device *dev, |
| 330 | struct device_attribute *attr, |
| 331 | const char *buf, size_t count) |
| 332 | { |
| 333 | int ret; |
| 334 | unsigned int thresh = 0; |
| 335 | |
| 336 | ret = kgsl_sysfs_store(buf, &thresh); |
| 337 | if (ret) |
| 338 | return ret; |
| 339 | |
| 340 | kgsl_driver.full_cache_threshold = thresh; |
| 341 | return count; |
| 342 | } |
| 343 | |
| 344 | static ssize_t kgsl_drv_full_cache_threshold_show(struct device *dev, |
| 345 | struct device_attribute *attr, |
| 346 | char *buf) |
| 347 | { |
| 348 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 349 | kgsl_driver.full_cache_threshold); |
| 350 | } |
| 351 | |
| 352 | static DEVICE_ATTR(vmalloc, 0444, kgsl_drv_memstat_show, NULL); |
| 353 | static DEVICE_ATTR(vmalloc_max, 0444, kgsl_drv_memstat_show, NULL); |
| 354 | static DEVICE_ATTR(page_alloc, 0444, kgsl_drv_memstat_show, NULL); |
| 355 | static DEVICE_ATTR(page_alloc_max, 0444, kgsl_drv_memstat_show, NULL); |
| 356 | static DEVICE_ATTR(coherent, 0444, kgsl_drv_memstat_show, NULL); |
| 357 | static DEVICE_ATTR(coherent_max, 0444, kgsl_drv_memstat_show, NULL); |
| 358 | static DEVICE_ATTR(secure, 0444, kgsl_drv_memstat_show, NULL); |
| 359 | static DEVICE_ATTR(secure_max, 0444, kgsl_drv_memstat_show, NULL); |
| 360 | static DEVICE_ATTR(mapped, 0444, kgsl_drv_memstat_show, NULL); |
| 361 | static DEVICE_ATTR(mapped_max, 0444, kgsl_drv_memstat_show, NULL); |
| 362 | static DEVICE_ATTR(full_cache_threshold, 0644, |
| 363 | kgsl_drv_full_cache_threshold_show, |
| 364 | kgsl_drv_full_cache_threshold_store); |
| 365 | |
| 366 | static const struct device_attribute *drv_attr_list[] = { |
| 367 | &dev_attr_vmalloc, |
| 368 | &dev_attr_vmalloc_max, |
| 369 | &dev_attr_page_alloc, |
| 370 | &dev_attr_page_alloc_max, |
| 371 | &dev_attr_coherent, |
| 372 | &dev_attr_coherent_max, |
| 373 | &dev_attr_secure, |
| 374 | &dev_attr_secure_max, |
| 375 | &dev_attr_mapped, |
| 376 | &dev_attr_mapped_max, |
| 377 | &dev_attr_full_cache_threshold, |
| 378 | NULL |
| 379 | }; |
| 380 | |
| 381 | void |
| 382 | kgsl_sharedmem_uninit_sysfs(void) |
| 383 | { |
| 384 | kgsl_remove_device_sysfs_files(&kgsl_driver.virtdev, drv_attr_list); |
| 385 | } |
| 386 | |
| 387 | int |
| 388 | kgsl_sharedmem_init_sysfs(void) |
| 389 | { |
| 390 | return kgsl_create_device_sysfs_files(&kgsl_driver.virtdev, |
| 391 | drv_attr_list); |
| 392 | } |
| 393 | |
| 394 | static int kgsl_cma_alloc_secure(struct kgsl_device *device, |
| 395 | struct kgsl_memdesc *memdesc, uint64_t size); |
| 396 | |
| 397 | static int kgsl_allocate_secure(struct kgsl_device *device, |
| 398 | struct kgsl_memdesc *memdesc, |
| 399 | uint64_t size) { |
| 400 | int ret; |
| 401 | |
| 402 | if (MMU_FEATURE(&device->mmu, KGSL_MMU_HYP_SECURE_ALLOC)) |
| 403 | ret = kgsl_sharedmem_page_alloc_user(memdesc, size); |
| 404 | else |
| 405 | ret = kgsl_cma_alloc_secure(device, memdesc, size); |
| 406 | |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | int kgsl_allocate_user(struct kgsl_device *device, |
| 411 | struct kgsl_memdesc *memdesc, |
| 412 | uint64_t size, uint64_t flags) |
| 413 | { |
| 414 | int ret; |
| 415 | |
Lynus Vaz | 90d98b5 | 2018-04-09 14:45:36 +0530 | [diff] [blame] | 416 | kgsl_memdesc_init(device, memdesc, flags); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 417 | |
| 418 | if (kgsl_mmu_get_mmutype(device) == KGSL_MMU_TYPE_NONE) |
| 419 | ret = kgsl_sharedmem_alloc_contig(device, memdesc, size); |
| 420 | else if (flags & KGSL_MEMFLAGS_SECURE) |
| 421 | ret = kgsl_allocate_secure(device, memdesc, size); |
| 422 | else |
| 423 | ret = kgsl_sharedmem_page_alloc_user(memdesc, size); |
| 424 | |
| 425 | return ret; |
| 426 | } |
| 427 | |
| 428 | static int kgsl_page_alloc_vmfault(struct kgsl_memdesc *memdesc, |
| 429 | struct vm_area_struct *vma, |
| 430 | struct vm_fault *vmf) |
| 431 | { |
| 432 | int pgoff; |
| 433 | unsigned int offset; |
| 434 | |
| 435 | offset = ((unsigned long) vmf->virtual_address - vma->vm_start); |
| 436 | |
| 437 | if (offset >= memdesc->size) |
| 438 | return VM_FAULT_SIGBUS; |
| 439 | |
| 440 | pgoff = offset >> PAGE_SHIFT; |
| 441 | |
| 442 | if (pgoff < memdesc->page_count) { |
| 443 | struct page *page = memdesc->pages[pgoff]; |
| 444 | |
| 445 | get_page(page); |
| 446 | vmf->page = page; |
| 447 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | return VM_FAULT_SIGBUS; |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * kgsl_page_alloc_unmap_kernel() - Unmap the memory in memdesc |
| 456 | * |
| 457 | * @memdesc: The memory descriptor which contains information about the memory |
| 458 | * |
| 459 | * Unmaps the memory mapped into kernel address space |
| 460 | */ |
| 461 | static void kgsl_page_alloc_unmap_kernel(struct kgsl_memdesc *memdesc) |
| 462 | { |
| 463 | mutex_lock(&kernel_map_global_lock); |
| 464 | if (!memdesc->hostptr) { |
| 465 | /* If already unmapped the refcount should be 0 */ |
| 466 | WARN_ON(memdesc->hostptr_count); |
| 467 | goto done; |
| 468 | } |
| 469 | memdesc->hostptr_count--; |
| 470 | if (memdesc->hostptr_count) |
| 471 | goto done; |
| 472 | vunmap(memdesc->hostptr); |
| 473 | |
| 474 | atomic_long_sub(memdesc->size, &kgsl_driver.stats.vmalloc); |
| 475 | memdesc->hostptr = NULL; |
| 476 | done: |
| 477 | mutex_unlock(&kernel_map_global_lock); |
| 478 | } |
| 479 | |
| 480 | static void kgsl_page_alloc_free(struct kgsl_memdesc *memdesc) |
| 481 | { |
| 482 | kgsl_page_alloc_unmap_kernel(memdesc); |
| 483 | /* we certainly do not expect the hostptr to still be mapped */ |
| 484 | BUG_ON(memdesc->hostptr); |
| 485 | |
| 486 | /* Secure buffers need to be unlocked before being freed */ |
| 487 | if (memdesc->priv & KGSL_MEMDESC_TZ_LOCKED) { |
| 488 | int ret; |
| 489 | int dest_perms = PERM_READ | PERM_WRITE | PERM_EXEC; |
| 490 | int source_vm = VMID_CP_PIXEL; |
| 491 | int dest_vm = VMID_HLOS; |
| 492 | |
| 493 | ret = hyp_assign_table(memdesc->sgt, &source_vm, 1, |
| 494 | &dest_vm, &dest_perms, 1); |
| 495 | if (ret) { |
| 496 | pr_err("Secure buf unlock failed: gpuaddr: %llx size: %llx ret: %d\n", |
| 497 | memdesc->gpuaddr, memdesc->size, ret); |
| 498 | BUG(); |
| 499 | } |
| 500 | |
| 501 | atomic_long_sub(memdesc->size, &kgsl_driver.stats.secure); |
| 502 | } else { |
| 503 | atomic_long_sub(memdesc->size, &kgsl_driver.stats.page_alloc); |
| 504 | } |
| 505 | |
| 506 | if (memdesc->priv & KGSL_MEMDESC_TZ_LOCKED) { |
| 507 | struct sg_page_iter sg_iter; |
| 508 | |
| 509 | for_each_sg_page(memdesc->sgt->sgl, &sg_iter, |
| 510 | memdesc->sgt->nents, 0) |
| 511 | ClearPagePrivate(sg_page_iter_page(&sg_iter)); |
| 512 | |
| 513 | } |
| 514 | |
| 515 | /* Free pages using the pages array for non secure paged memory */ |
| 516 | if (memdesc->pages != NULL) |
| 517 | kgsl_pool_free_pages(memdesc->pages, memdesc->page_count); |
| 518 | else |
| 519 | kgsl_pool_free_sgt(memdesc->sgt); |
| 520 | |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * kgsl_page_alloc_map_kernel - Map the memory in memdesc to kernel address |
| 525 | * space |
| 526 | * |
| 527 | * @memdesc - The memory descriptor which contains information about the memory |
| 528 | * |
| 529 | * Return: 0 on success else error code |
| 530 | */ |
| 531 | static int kgsl_page_alloc_map_kernel(struct kgsl_memdesc *memdesc) |
| 532 | { |
| 533 | int ret = 0; |
| 534 | |
| 535 | /* Sanity check - don't map more than we could possibly chew */ |
| 536 | if (memdesc->size > ULONG_MAX) |
| 537 | return -ENOMEM; |
| 538 | |
| 539 | mutex_lock(&kernel_map_global_lock); |
| 540 | if ((!memdesc->hostptr) && (memdesc->pages != NULL)) { |
| 541 | pgprot_t page_prot = pgprot_writecombine(PAGE_KERNEL); |
| 542 | |
| 543 | memdesc->hostptr = vmap(memdesc->pages, memdesc->page_count, |
| 544 | VM_IOREMAP, page_prot); |
| 545 | if (memdesc->hostptr) |
| 546 | KGSL_STATS_ADD(memdesc->size, |
| 547 | &kgsl_driver.stats.vmalloc, |
| 548 | &kgsl_driver.stats.vmalloc_max); |
| 549 | else |
| 550 | ret = -ENOMEM; |
| 551 | } |
| 552 | if (memdesc->hostptr) |
| 553 | memdesc->hostptr_count++; |
| 554 | |
| 555 | mutex_unlock(&kernel_map_global_lock); |
| 556 | |
| 557 | return ret; |
| 558 | } |
| 559 | |
| 560 | static int kgsl_contiguous_vmfault(struct kgsl_memdesc *memdesc, |
| 561 | struct vm_area_struct *vma, |
| 562 | struct vm_fault *vmf) |
| 563 | { |
| 564 | unsigned long offset, pfn; |
| 565 | int ret; |
| 566 | |
| 567 | offset = ((unsigned long) vmf->virtual_address - vma->vm_start) >> |
| 568 | PAGE_SHIFT; |
| 569 | |
| 570 | pfn = (memdesc->physaddr >> PAGE_SHIFT) + offset; |
| 571 | ret = vm_insert_pfn(vma, (unsigned long) vmf->virtual_address, pfn); |
| 572 | |
| 573 | if (ret == -ENOMEM || ret == -EAGAIN) |
| 574 | return VM_FAULT_OOM; |
| 575 | else if (ret == -EFAULT) |
| 576 | return VM_FAULT_SIGBUS; |
| 577 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 578 | return VM_FAULT_NOPAGE; |
| 579 | } |
| 580 | |
| 581 | static void kgsl_cma_coherent_free(struct kgsl_memdesc *memdesc) |
| 582 | { |
| 583 | unsigned long attrs = 0; |
| 584 | |
| 585 | if (memdesc->hostptr) { |
| 586 | if (memdesc->priv & KGSL_MEMDESC_SECURE) { |
| 587 | atomic_long_sub(memdesc->size, |
| 588 | &kgsl_driver.stats.secure); |
| 589 | |
| 590 | kgsl_cma_unlock_secure(memdesc); |
Hareesh Gundu | 525f63e | 2019-09-18 13:35:26 +0530 | [diff] [blame] | 591 | attrs = memdesc->attrs; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 592 | } else |
| 593 | atomic_long_sub(memdesc->size, |
| 594 | &kgsl_driver.stats.coherent); |
| 595 | |
| 596 | dma_free_attrs(memdesc->dev, (size_t) memdesc->size, |
| 597 | memdesc->hostptr, memdesc->physaddr, attrs); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /* Global */ |
| 602 | static struct kgsl_memdesc_ops kgsl_page_alloc_ops = { |
| 603 | .free = kgsl_page_alloc_free, |
| 604 | .vmflags = VM_DONTDUMP | VM_DONTEXPAND | VM_DONTCOPY, |
| 605 | .vmfault = kgsl_page_alloc_vmfault, |
| 606 | .map_kernel = kgsl_page_alloc_map_kernel, |
| 607 | .unmap_kernel = kgsl_page_alloc_unmap_kernel, |
| 608 | }; |
| 609 | |
| 610 | /* CMA ops - used during NOMMU mode */ |
| 611 | static struct kgsl_memdesc_ops kgsl_cma_ops = { |
| 612 | .free = kgsl_cma_coherent_free, |
| 613 | .vmflags = VM_DONTDUMP | VM_PFNMAP | VM_DONTEXPAND | VM_DONTCOPY, |
| 614 | .vmfault = kgsl_contiguous_vmfault, |
| 615 | }; |
| 616 | |
| 617 | #ifdef CONFIG_ARM64 |
| 618 | /* |
| 619 | * For security reasons, ARMv8 doesn't allow invalidate only on read-only |
| 620 | * mapping. It would be performance prohibitive to read the permissions on |
| 621 | * the buffer before the operation. Every use case that we have found does not |
| 622 | * assume that an invalidate operation is invalidate only, so we feel |
| 623 | * comfortable turning invalidates into flushes for these targets |
| 624 | */ |
| 625 | static inline unsigned int _fixup_cache_range_op(unsigned int op) |
| 626 | { |
| 627 | if (op == KGSL_CACHE_OP_INV) |
| 628 | return KGSL_CACHE_OP_FLUSH; |
| 629 | return op; |
| 630 | } |
| 631 | #else |
| 632 | static inline unsigned int _fixup_cache_range_op(unsigned int op) |
| 633 | { |
| 634 | return op; |
| 635 | } |
| 636 | #endif |
| 637 | |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 638 | static inline void _cache_op(unsigned int op, |
| 639 | const void *start, const void *end) |
| 640 | { |
| 641 | /* |
| 642 | * The dmac_xxx_range functions handle addresses and sizes that |
| 643 | * are not aligned to the cacheline size correctly. |
| 644 | */ |
| 645 | switch (_fixup_cache_range_op(op)) { |
| 646 | case KGSL_CACHE_OP_FLUSH: |
| 647 | dmac_flush_range(start, end); |
| 648 | break; |
| 649 | case KGSL_CACHE_OP_CLEAN: |
| 650 | dmac_clean_range(start, end); |
| 651 | break; |
| 652 | case KGSL_CACHE_OP_INV: |
| 653 | dmac_inv_range(start, end); |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | static int kgsl_do_cache_op(struct page *page, void *addr, |
| 659 | uint64_t offset, uint64_t size, unsigned int op) |
| 660 | { |
| 661 | if (page != NULL) { |
| 662 | unsigned long pfn = page_to_pfn(page) + offset / PAGE_SIZE; |
| 663 | /* |
| 664 | * page_address() returns the kernel virtual address of page. |
| 665 | * For high memory kernel virtual address exists only if page |
| 666 | * has been mapped. So use a version of kmap rather than |
| 667 | * page_address() for high memory. |
| 668 | */ |
| 669 | if (PageHighMem(page)) { |
| 670 | offset &= ~PAGE_MASK; |
| 671 | |
| 672 | do { |
| 673 | unsigned int len = size; |
| 674 | |
| 675 | if (len + offset > PAGE_SIZE) |
| 676 | len = PAGE_SIZE - offset; |
| 677 | |
| 678 | page = pfn_to_page(pfn++); |
| 679 | addr = kmap_atomic(page); |
| 680 | _cache_op(op, addr + offset, |
| 681 | addr + offset + len); |
| 682 | kunmap_atomic(addr); |
| 683 | |
| 684 | size -= len; |
| 685 | offset = 0; |
| 686 | } while (size); |
| 687 | |
| 688 | return 0; |
| 689 | } |
| 690 | |
| 691 | addr = page_address(page); |
| 692 | } |
| 693 | |
| 694 | _cache_op(op, addr + offset, addr + offset + (size_t) size); |
| 695 | return 0; |
| 696 | } |
| 697 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 698 | int kgsl_cache_range_op(struct kgsl_memdesc *memdesc, uint64_t offset, |
| 699 | uint64_t size, unsigned int op) |
| 700 | { |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 701 | void *addr = NULL; |
Deepak Kumar | cbadd1f | 2017-05-23 13:13:35 +0530 | [diff] [blame] | 702 | struct sg_table *sgt = NULL; |
| 703 | struct scatterlist *sg; |
| 704 | unsigned int i, pos = 0; |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 705 | int ret = 0; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 706 | |
| 707 | if (size == 0 || size > UINT_MAX) |
| 708 | return -EINVAL; |
| 709 | |
| 710 | /* Make sure that the offset + size does not overflow */ |
| 711 | if ((offset + size < offset) || (offset + size < size)) |
| 712 | return -ERANGE; |
| 713 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 714 | /* Check that offset+length does not exceed memdesc->size */ |
| 715 | if (offset + size > memdesc->size) |
| 716 | return -ERANGE; |
| 717 | |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 718 | if (memdesc->hostptr) { |
| 719 | addr = memdesc->hostptr; |
| 720 | /* Make sure the offset + size do not overflow the address */ |
| 721 | if (addr + ((size_t) offset + (size_t) size) < addr) |
| 722 | return -ERANGE; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 723 | |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 724 | ret = kgsl_do_cache_op(NULL, addr, offset, size, op); |
| 725 | return ret; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 726 | } |
| 727 | |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 728 | /* |
| 729 | * If the buffer is not to mapped to kernel, perform cache |
| 730 | * operations after mapping to kernel. |
| 731 | */ |
Deepak Kumar | cbadd1f | 2017-05-23 13:13:35 +0530 | [diff] [blame] | 732 | if (memdesc->sgt != NULL) |
| 733 | sgt = memdesc->sgt; |
| 734 | else { |
| 735 | if (memdesc->pages == NULL) |
| 736 | return ret; |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 737 | |
Deepak Kumar | cbadd1f | 2017-05-23 13:13:35 +0530 | [diff] [blame] | 738 | sgt = kgsl_alloc_sgt_from_pages(memdesc); |
| 739 | if (IS_ERR(sgt)) |
| 740 | return PTR_ERR(sgt); |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 741 | } |
Deepak Kumar | cbadd1f | 2017-05-23 13:13:35 +0530 | [diff] [blame] | 742 | |
| 743 | for_each_sg(sgt->sgl, sg, sgt->nents, i) { |
| 744 | uint64_t sg_offset, sg_left; |
| 745 | |
| 746 | if (offset >= (pos + sg->length)) { |
| 747 | pos += sg->length; |
| 748 | continue; |
| 749 | } |
| 750 | sg_offset = offset > pos ? offset - pos : 0; |
| 751 | sg_left = (sg->length - sg_offset > size) ? size : |
| 752 | sg->length - sg_offset; |
| 753 | ret = kgsl_do_cache_op(sg_page(sg), NULL, sg_offset, |
| 754 | sg_left, op); |
| 755 | size -= sg_left; |
| 756 | if (size == 0) |
| 757 | break; |
| 758 | pos += sg->length; |
| 759 | } |
| 760 | |
| 761 | if (memdesc->sgt == NULL) |
| 762 | kgsl_free_sgt(sgt); |
| 763 | |
Hareesh Gundu | 2e943a3 | 2017-04-21 15:38:13 +0530 | [diff] [blame] | 764 | return ret; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 765 | } |
| 766 | EXPORT_SYMBOL(kgsl_cache_range_op); |
| 767 | |
Lynus Vaz | 90d98b5 | 2018-04-09 14:45:36 +0530 | [diff] [blame] | 768 | void kgsl_memdesc_init(struct kgsl_device *device, |
| 769 | struct kgsl_memdesc *memdesc, uint64_t flags) |
| 770 | { |
| 771 | struct kgsl_mmu *mmu = &device->mmu; |
| 772 | unsigned int align; |
| 773 | |
| 774 | memset(memdesc, 0, sizeof(*memdesc)); |
| 775 | /* Turn off SVM if the system doesn't support it */ |
| 776 | if (!kgsl_mmu_use_cpu_map(mmu)) |
| 777 | flags &= ~((uint64_t) KGSL_MEMFLAGS_USE_CPU_MAP); |
| 778 | |
| 779 | /* Secure memory disables advanced addressing modes */ |
| 780 | if (flags & KGSL_MEMFLAGS_SECURE) |
| 781 | flags &= ~((uint64_t) KGSL_MEMFLAGS_USE_CPU_MAP); |
| 782 | |
| 783 | /* Disable IO coherence if it is not supported on the chip */ |
| 784 | if (!MMU_FEATURE(mmu, KGSL_MMU_IO_COHERENT)) |
| 785 | flags &= ~((uint64_t) KGSL_MEMFLAGS_IOCOHERENT); |
| 786 | |
| 787 | if (MMU_FEATURE(mmu, KGSL_MMU_NEED_GUARD_PAGE)) |
| 788 | memdesc->priv |= KGSL_MEMDESC_GUARD_PAGE; |
| 789 | |
| 790 | if (flags & KGSL_MEMFLAGS_SECURE) |
| 791 | memdesc->priv |= KGSL_MEMDESC_SECURE; |
| 792 | |
| 793 | memdesc->flags = flags; |
| 794 | memdesc->dev = device->dev->parent; |
| 795 | |
| 796 | align = max_t(unsigned int, |
| 797 | (memdesc->flags & KGSL_MEMALIGN_MASK) >> KGSL_MEMALIGN_SHIFT, |
| 798 | ilog2(PAGE_SIZE)); |
| 799 | kgsl_memdesc_set_align(memdesc, align); |
| 800 | } |
| 801 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 802 | int |
| 803 | kgsl_sharedmem_page_alloc_user(struct kgsl_memdesc *memdesc, |
| 804 | uint64_t size) |
| 805 | { |
| 806 | int ret = 0; |
| 807 | unsigned int j, page_size, len_alloc; |
| 808 | unsigned int pcount = 0; |
| 809 | size_t len; |
| 810 | unsigned int align; |
| 811 | |
Deepak Kumar | f1ffe20 | 2017-06-21 13:12:33 +0530 | [diff] [blame] | 812 | static DEFINE_RATELIMIT_STATE(_rs, |
| 813 | DEFAULT_RATELIMIT_INTERVAL, |
| 814 | DEFAULT_RATELIMIT_BURST); |
| 815 | |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 816 | size = PAGE_ALIGN(size); |
| 817 | if (size == 0 || size > UINT_MAX) |
| 818 | return -EINVAL; |
| 819 | |
| 820 | align = (memdesc->flags & KGSL_MEMALIGN_MASK) >> KGSL_MEMALIGN_SHIFT; |
| 821 | |
Deepak Kumar | c71e9ca | 2018-03-14 17:04:53 +0530 | [diff] [blame] | 822 | /* |
| 823 | * As 1MB is the max supported page size, use the alignment |
| 824 | * corresponding to 1MB page to make sure higher order pages |
| 825 | * are used if possible for a given memory size. Also, we |
| 826 | * don't need to update alignment in memdesc flags in case |
| 827 | * higher order page is used, as memdesc flags represent the |
| 828 | * virtual alignment specified by the user which is anyways |
| 829 | * getting satisfied. |
| 830 | */ |
| 831 | if (align < ilog2(SZ_1M)) |
| 832 | align = ilog2(SZ_1M); |
| 833 | |
Hareesh Gundu | f32a49f | 2016-11-21 19:18:29 +0530 | [diff] [blame] | 834 | page_size = kgsl_get_page_size(size, align); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | * The alignment cannot be less than the intended page size - it can be |
| 838 | * larger however to accommodate hardware quirks |
| 839 | */ |
| 840 | |
| 841 | if (align < ilog2(page_size)) { |
| 842 | kgsl_memdesc_set_align(memdesc, ilog2(page_size)); |
| 843 | align = ilog2(page_size); |
| 844 | } |
| 845 | |
| 846 | /* |
| 847 | * There needs to be enough room in the page array to be able to |
| 848 | * service the allocation entirely with PAGE_SIZE sized chunks |
| 849 | */ |
| 850 | |
| 851 | len_alloc = PAGE_ALIGN(size) >> PAGE_SHIFT; |
| 852 | |
| 853 | memdesc->ops = &kgsl_page_alloc_ops; |
| 854 | |
| 855 | /* |
| 856 | * Allocate space to store the list of pages. This is an array of |
| 857 | * pointers so we can track 1024 pages per page of allocation. |
| 858 | * Keep this array around for non global non secure buffers that |
| 859 | * are allocated by kgsl. This helps with improving the vm fault |
| 860 | * routine by finding the faulted page in constant time. |
| 861 | */ |
| 862 | |
| 863 | memdesc->pages = kgsl_malloc(len_alloc * sizeof(struct page *)); |
Lynus Vaz | ae90268 | 2017-06-21 12:09:37 +0530 | [diff] [blame] | 864 | memdesc->page_count = 0; |
| 865 | memdesc->size = 0; |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 866 | |
| 867 | if (memdesc->pages == NULL) { |
| 868 | ret = -ENOMEM; |
| 869 | goto done; |
| 870 | } |
| 871 | |
| 872 | len = size; |
| 873 | |
| 874 | while (len > 0) { |
| 875 | int page_count; |
| 876 | |
| 877 | page_count = kgsl_pool_alloc_page(&page_size, |
| 878 | memdesc->pages + pcount, |
| 879 | len_alloc - pcount, |
| 880 | &align); |
| 881 | if (page_count <= 0) { |
| 882 | if (page_count == -EAGAIN) |
| 883 | continue; |
| 884 | |
| 885 | /* |
| 886 | * Update sglen and memdesc size,as requested allocation |
| 887 | * not served fully. So that they can be correctly freed |
| 888 | * in kgsl_sharedmem_free(). |
| 889 | */ |
| 890 | memdesc->size = (size - len); |
| 891 | |
Deepak Kumar | f1ffe20 | 2017-06-21 13:12:33 +0530 | [diff] [blame] | 892 | if (sharedmem_noretry_flag != true && |
| 893 | __ratelimit(&_rs)) |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 894 | KGSL_CORE_ERR( |
| 895 | "Out of memory: only allocated %lldKB of %lldKB requested\n", |
| 896 | (size - len) >> 10, size >> 10); |
| 897 | |
| 898 | ret = -ENOMEM; |
| 899 | goto done; |
| 900 | } |
| 901 | |
| 902 | pcount += page_count; |
| 903 | len -= page_size; |
| 904 | memdesc->size += page_size; |
| 905 | memdesc->page_count += page_count; |
| 906 | |
| 907 | /* Get the needed page size for the next iteration */ |
Hareesh Gundu | f32a49f | 2016-11-21 19:18:29 +0530 | [diff] [blame] | 908 | page_size = kgsl_get_page_size(len, align); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 909 | } |
| 910 | |
| 911 | /* Call to the hypervisor to lock any secure buffer allocations */ |
| 912 | if (memdesc->flags & KGSL_MEMFLAGS_SECURE) { |
| 913 | unsigned int i; |
| 914 | struct scatterlist *sg; |
| 915 | int dest_perms = PERM_READ | PERM_WRITE; |
| 916 | int source_vm = VMID_HLOS; |
| 917 | int dest_vm = VMID_CP_PIXEL; |
| 918 | |
| 919 | memdesc->sgt = kmalloc(sizeof(struct sg_table), GFP_KERNEL); |
| 920 | if (memdesc->sgt == NULL) { |
| 921 | ret = -ENOMEM; |
| 922 | goto done; |
| 923 | } |
| 924 | |
| 925 | ret = sg_alloc_table_from_pages(memdesc->sgt, memdesc->pages, |
| 926 | memdesc->page_count, 0, memdesc->size, GFP_KERNEL); |
| 927 | if (ret) { |
| 928 | kfree(memdesc->sgt); |
| 929 | goto done; |
| 930 | } |
| 931 | |
| 932 | ret = hyp_assign_table(memdesc->sgt, &source_vm, 1, |
| 933 | &dest_vm, &dest_perms, 1); |
| 934 | if (ret) { |
| 935 | sg_free_table(memdesc->sgt); |
| 936 | kfree(memdesc->sgt); |
| 937 | memdesc->sgt = NULL; |
| 938 | goto done; |
| 939 | } |
| 940 | |
| 941 | /* Set private bit for each sg to indicate that its secured */ |
| 942 | for_each_sg(memdesc->sgt->sgl, sg, memdesc->sgt->nents, i) |
| 943 | SetPagePrivate(sg_page(sg)); |
| 944 | |
| 945 | memdesc->priv |= KGSL_MEMDESC_TZ_LOCKED; |
| 946 | |
| 947 | /* Record statistics */ |
| 948 | KGSL_STATS_ADD(memdesc->size, &kgsl_driver.stats.secure, |
| 949 | &kgsl_driver.stats.secure_max); |
| 950 | |
| 951 | /* |
| 952 | * We don't need the array for secure buffers because they are |
| 953 | * not mapped to CPU |
| 954 | */ |
| 955 | kgsl_free(memdesc->pages); |
| 956 | memdesc->pages = NULL; |
| 957 | memdesc->page_count = 0; |
| 958 | |
| 959 | /* Don't map and zero the locked secure buffer */ |
| 960 | goto done; |
| 961 | } |
| 962 | |
| 963 | KGSL_STATS_ADD(memdesc->size, &kgsl_driver.stats.page_alloc, |
| 964 | &kgsl_driver.stats.page_alloc_max); |
| 965 | |
| 966 | done: |
| 967 | if (ret) { |
| 968 | if (memdesc->pages) { |
| 969 | unsigned int count = 1; |
| 970 | |
| 971 | for (j = 0; j < pcount; j += count) { |
| 972 | count = 1 << compound_order(memdesc->pages[j]); |
| 973 | kgsl_pool_free_page(memdesc->pages[j]); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | kgsl_free(memdesc->pages); |
| 978 | memset(memdesc, 0, sizeof(*memdesc)); |
| 979 | } |
| 980 | |
| 981 | return ret; |
| 982 | } |
| 983 | |
| 984 | void kgsl_sharedmem_free(struct kgsl_memdesc *memdesc) |
| 985 | { |
| 986 | if (memdesc == NULL || memdesc->size == 0) |
| 987 | return; |
| 988 | |
| 989 | /* Make sure the memory object has been unmapped */ |
| 990 | kgsl_mmu_put_gpuaddr(memdesc); |
| 991 | |
| 992 | if (memdesc->ops && memdesc->ops->free) |
| 993 | memdesc->ops->free(memdesc); |
| 994 | |
| 995 | if (memdesc->sgt) { |
| 996 | sg_free_table(memdesc->sgt); |
| 997 | kfree(memdesc->sgt); |
| 998 | } |
| 999 | |
| 1000 | if (memdesc->pages) |
| 1001 | kgsl_free(memdesc->pages); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 1002 | } |
| 1003 | EXPORT_SYMBOL(kgsl_sharedmem_free); |
| 1004 | |
| 1005 | int |
| 1006 | kgsl_sharedmem_readl(const struct kgsl_memdesc *memdesc, |
| 1007 | uint32_t *dst, |
| 1008 | uint64_t offsetbytes) |
| 1009 | { |
| 1010 | uint32_t *src; |
| 1011 | |
| 1012 | if (WARN_ON(memdesc == NULL || memdesc->hostptr == NULL || |
| 1013 | dst == NULL)) |
| 1014 | return -EINVAL; |
| 1015 | |
| 1016 | WARN_ON(offsetbytes % sizeof(uint32_t) != 0); |
| 1017 | if (offsetbytes % sizeof(uint32_t) != 0) |
| 1018 | return -EINVAL; |
| 1019 | |
| 1020 | WARN_ON(offsetbytes > (memdesc->size - sizeof(uint32_t))); |
| 1021 | if (offsetbytes > (memdesc->size - sizeof(uint32_t))) |
| 1022 | return -ERANGE; |
| 1023 | |
| 1024 | /* |
| 1025 | * We are reading shared memory between CPU and GPU. |
| 1026 | * Make sure reads before this are complete |
| 1027 | */ |
| 1028 | rmb(); |
| 1029 | src = (uint32_t *)(memdesc->hostptr + offsetbytes); |
| 1030 | *dst = *src; |
| 1031 | return 0; |
| 1032 | } |
| 1033 | EXPORT_SYMBOL(kgsl_sharedmem_readl); |
| 1034 | |
| 1035 | int |
| 1036 | kgsl_sharedmem_writel(struct kgsl_device *device, |
| 1037 | const struct kgsl_memdesc *memdesc, |
| 1038 | uint64_t offsetbytes, |
| 1039 | uint32_t src) |
| 1040 | { |
| 1041 | uint32_t *dst; |
| 1042 | |
| 1043 | if (WARN_ON(memdesc == NULL || memdesc->hostptr == NULL)) |
| 1044 | return -EINVAL; |
| 1045 | |
| 1046 | WARN_ON(offsetbytes % sizeof(uint32_t) != 0); |
| 1047 | if (offsetbytes % sizeof(uint32_t) != 0) |
| 1048 | return -EINVAL; |
| 1049 | |
| 1050 | WARN_ON(offsetbytes > (memdesc->size - sizeof(uint32_t))); |
| 1051 | if (offsetbytes > (memdesc->size - sizeof(uint32_t))) |
| 1052 | return -ERANGE; |
| 1053 | dst = (uint32_t *)(memdesc->hostptr + offsetbytes); |
| 1054 | *dst = src; |
| 1055 | |
| 1056 | /* |
| 1057 | * We are writing to shared memory between CPU and GPU. |
| 1058 | * Make sure write above is posted immediately |
| 1059 | */ |
| 1060 | wmb(); |
| 1061 | |
| 1062 | return 0; |
| 1063 | } |
| 1064 | EXPORT_SYMBOL(kgsl_sharedmem_writel); |
| 1065 | |
| 1066 | int |
| 1067 | kgsl_sharedmem_readq(const struct kgsl_memdesc *memdesc, |
| 1068 | uint64_t *dst, |
| 1069 | uint64_t offsetbytes) |
| 1070 | { |
| 1071 | uint64_t *src; |
| 1072 | |
| 1073 | if (WARN_ON(memdesc == NULL || memdesc->hostptr == NULL || |
| 1074 | dst == NULL)) |
| 1075 | return -EINVAL; |
| 1076 | |
| 1077 | WARN_ON(offsetbytes % sizeof(uint32_t) != 0); |
| 1078 | if (offsetbytes % sizeof(uint32_t) != 0) |
| 1079 | return -EINVAL; |
| 1080 | |
| 1081 | WARN_ON(offsetbytes > (memdesc->size - sizeof(uint32_t))); |
| 1082 | if (offsetbytes > (memdesc->size - sizeof(uint32_t))) |
| 1083 | return -ERANGE; |
| 1084 | |
| 1085 | /* |
| 1086 | * We are reading shared memory between CPU and GPU. |
| 1087 | * Make sure reads before this are complete |
| 1088 | */ |
| 1089 | rmb(); |
| 1090 | src = (uint64_t *)(memdesc->hostptr + offsetbytes); |
| 1091 | *dst = *src; |
| 1092 | return 0; |
| 1093 | } |
| 1094 | EXPORT_SYMBOL(kgsl_sharedmem_readq); |
| 1095 | |
| 1096 | int |
| 1097 | kgsl_sharedmem_writeq(struct kgsl_device *device, |
| 1098 | const struct kgsl_memdesc *memdesc, |
| 1099 | uint64_t offsetbytes, |
| 1100 | uint64_t src) |
| 1101 | { |
| 1102 | uint64_t *dst; |
| 1103 | |
| 1104 | if (WARN_ON(memdesc == NULL || memdesc->hostptr == NULL)) |
| 1105 | return -EINVAL; |
| 1106 | |
| 1107 | WARN_ON(offsetbytes % sizeof(uint32_t) != 0); |
| 1108 | if (offsetbytes % sizeof(uint32_t) != 0) |
| 1109 | return -EINVAL; |
| 1110 | |
| 1111 | WARN_ON(offsetbytes > (memdesc->size - sizeof(uint32_t))); |
| 1112 | if (offsetbytes > (memdesc->size - sizeof(uint32_t))) |
| 1113 | return -ERANGE; |
| 1114 | dst = (uint64_t *)(memdesc->hostptr + offsetbytes); |
| 1115 | *dst = src; |
| 1116 | |
| 1117 | /* |
| 1118 | * We are writing to shared memory between CPU and GPU. |
| 1119 | * Make sure write above is posted immediately |
| 1120 | */ |
| 1121 | wmb(); |
| 1122 | |
| 1123 | return 0; |
| 1124 | } |
| 1125 | EXPORT_SYMBOL(kgsl_sharedmem_writeq); |
| 1126 | |
| 1127 | int |
| 1128 | kgsl_sharedmem_set(struct kgsl_device *device, |
| 1129 | const struct kgsl_memdesc *memdesc, uint64_t offsetbytes, |
| 1130 | unsigned int value, uint64_t sizebytes) |
| 1131 | { |
| 1132 | if (WARN_ON(memdesc == NULL || memdesc->hostptr == NULL)) |
| 1133 | return -EINVAL; |
| 1134 | |
| 1135 | if (WARN_ON(offsetbytes + sizebytes > memdesc->size)) |
| 1136 | return -EINVAL; |
| 1137 | |
| 1138 | memset(memdesc->hostptr + offsetbytes, value, sizebytes); |
| 1139 | return 0; |
| 1140 | } |
| 1141 | EXPORT_SYMBOL(kgsl_sharedmem_set); |
| 1142 | |
| 1143 | static const char * const memtype_str[] = { |
| 1144 | [KGSL_MEMTYPE_OBJECTANY] = "any(0)", |
| 1145 | [KGSL_MEMTYPE_FRAMEBUFFER] = "framebuffer", |
| 1146 | [KGSL_MEMTYPE_RENDERBUFFER] = "renderbuffer", |
| 1147 | [KGSL_MEMTYPE_ARRAYBUFFER] = "arraybuffer", |
| 1148 | [KGSL_MEMTYPE_ELEMENTARRAYBUFFER] = "elementarraybuffer", |
| 1149 | [KGSL_MEMTYPE_VERTEXARRAYBUFFER] = "vertexarraybuffer", |
| 1150 | [KGSL_MEMTYPE_TEXTURE] = "texture", |
| 1151 | [KGSL_MEMTYPE_SURFACE] = "surface", |
| 1152 | [KGSL_MEMTYPE_EGL_SURFACE] = "egl_surface", |
| 1153 | [KGSL_MEMTYPE_GL] = "gl", |
| 1154 | [KGSL_MEMTYPE_CL] = "cl", |
| 1155 | [KGSL_MEMTYPE_CL_BUFFER_MAP] = "cl_buffer_map", |
| 1156 | [KGSL_MEMTYPE_CL_BUFFER_NOMAP] = "cl_buffer_nomap", |
| 1157 | [KGSL_MEMTYPE_CL_IMAGE_MAP] = "cl_image_map", |
| 1158 | [KGSL_MEMTYPE_CL_IMAGE_NOMAP] = "cl_image_nomap", |
| 1159 | [KGSL_MEMTYPE_CL_KERNEL_STACK] = "cl_kernel_stack", |
| 1160 | [KGSL_MEMTYPE_COMMAND] = "command", |
| 1161 | [KGSL_MEMTYPE_2D] = "2d", |
| 1162 | [KGSL_MEMTYPE_EGL_IMAGE] = "egl_image", |
| 1163 | [KGSL_MEMTYPE_EGL_SHADOW] = "egl_shadow", |
| 1164 | [KGSL_MEMTYPE_MULTISAMPLE] = "egl_multisample", |
| 1165 | /* KGSL_MEMTYPE_KERNEL handled below, to avoid huge array */ |
| 1166 | }; |
| 1167 | |
| 1168 | void kgsl_get_memory_usage(char *name, size_t name_size, uint64_t memflags) |
| 1169 | { |
| 1170 | unsigned int type = MEMFLAGS(memflags, KGSL_MEMTYPE_MASK, |
| 1171 | KGSL_MEMTYPE_SHIFT); |
| 1172 | |
| 1173 | if (type == KGSL_MEMTYPE_KERNEL) |
| 1174 | strlcpy(name, "kernel", name_size); |
| 1175 | else if (type < ARRAY_SIZE(memtype_str) && memtype_str[type] != NULL) |
| 1176 | strlcpy(name, memtype_str[type], name_size); |
| 1177 | else |
Young Hwan Kwak | 8cc418d | 2017-09-07 16:29:27 +0800 | [diff] [blame] | 1178 | snprintf(name, name_size, "VK/others(%3d)", type); |
Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame] | 1179 | } |
| 1180 | EXPORT_SYMBOL(kgsl_get_memory_usage); |
| 1181 | |
| 1182 | int kgsl_sharedmem_alloc_contig(struct kgsl_device *device, |
| 1183 | struct kgsl_memdesc *memdesc, uint64_t size) |
| 1184 | { |
| 1185 | int result = 0; |
| 1186 | |
| 1187 | size = PAGE_ALIGN(size); |
| 1188 | if (size == 0 || size > SIZE_MAX) |
| 1189 | return -EINVAL; |
| 1190 | |
| 1191 | memdesc->size = size; |
| 1192 | memdesc->ops = &kgsl_cma_ops; |
| 1193 | memdesc->dev = device->dev->parent; |
| 1194 | |
| 1195 | memdesc->hostptr = dma_alloc_attrs(memdesc->dev, (size_t) size, |
| 1196 | &memdesc->physaddr, GFP_KERNEL, 0); |
| 1197 | |
| 1198 | if (memdesc->hostptr == NULL) { |
| 1199 | result = -ENOMEM; |
| 1200 | goto err; |
| 1201 | } |
| 1202 | |
| 1203 | result = memdesc_sg_dma(memdesc, memdesc->physaddr, size); |
| 1204 | if (result) |
| 1205 | goto err; |
| 1206 | |
| 1207 | /* Record statistics */ |
| 1208 | |
| 1209 | if (kgsl_mmu_get_mmutype(device) == KGSL_MMU_TYPE_NONE) |
| 1210 | memdesc->gpuaddr = memdesc->physaddr; |
| 1211 | |
| 1212 | KGSL_STATS_ADD(size, &kgsl_driver.stats.coherent, |
| 1213 | &kgsl_driver.stats.coherent_max); |
| 1214 | |
| 1215 | err: |
| 1216 | if (result) |
| 1217 | kgsl_sharedmem_free(memdesc); |
| 1218 | |
| 1219 | return result; |
| 1220 | } |
| 1221 | EXPORT_SYMBOL(kgsl_sharedmem_alloc_contig); |
| 1222 | |
| 1223 | static int scm_lock_chunk(struct kgsl_memdesc *memdesc, int lock) |
| 1224 | { |
| 1225 | struct cp2_lock_req request; |
| 1226 | unsigned int resp; |
| 1227 | unsigned int *chunk_list; |
| 1228 | struct scm_desc desc = {0}; |
| 1229 | int result; |
| 1230 | |
| 1231 | /* |
| 1232 | * Flush the virt addr range before sending the memory to the |
| 1233 | * secure environment to ensure the data is actually present |
| 1234 | * in RAM |
| 1235 | * |
| 1236 | * Chunk_list holds the physical address of secure memory. |
| 1237 | * Pass in the virtual address of chunk_list to flush. |
| 1238 | * Chunk_list size is 1 because secure memory is physically |
| 1239 | * contiguous. |
| 1240 | */ |
| 1241 | chunk_list = kzalloc(sizeof(unsigned int), GFP_KERNEL); |
| 1242 | if (!chunk_list) |
| 1243 | return -ENOMEM; |
| 1244 | |
| 1245 | chunk_list[0] = memdesc->physaddr; |
| 1246 | dmac_flush_range((void *)chunk_list, (void *)chunk_list + 1); |
| 1247 | |
| 1248 | request.chunks.chunk_list = virt_to_phys(chunk_list); |
| 1249 | /* |
| 1250 | * virt_to_phys(chunk_list) may be an address > 4GB. It is guaranteed |
| 1251 | * that when using scm_call (the older interface), the phys addresses |
| 1252 | * will be restricted to below 4GB. |
| 1253 | */ |
| 1254 | desc.args[0] = virt_to_phys(chunk_list); |
| 1255 | desc.args[1] = request.chunks.chunk_list_size = 1; |
| 1256 | desc.args[2] = request.chunks.chunk_size = (unsigned int) memdesc->size; |
| 1257 | desc.args[3] = request.mem_usage = 0; |
| 1258 | desc.args[4] = request.lock = lock; |
| 1259 | desc.args[5] = 0; |
| 1260 | desc.arginfo = SCM_ARGS(6, SCM_RW, SCM_VAL, SCM_VAL, SCM_VAL, SCM_VAL, |
| 1261 | SCM_VAL); |
| 1262 | kmap_flush_unused(); |
| 1263 | kmap_atomic_flush_unused(); |
| 1264 | if (!is_scm_armv8()) { |
| 1265 | result = scm_call(SCM_SVC_MP, MEM_PROTECT_LOCK_ID2, |
| 1266 | &request, sizeof(request), &resp, sizeof(resp)); |
| 1267 | } else { |
| 1268 | result = scm_call2(SCM_SIP_FNID(SCM_SVC_MP, |
| 1269 | MEM_PROTECT_LOCK_ID2_FLAT), &desc); |
| 1270 | resp = desc.ret[0]; |
| 1271 | } |
| 1272 | |
| 1273 | kfree(chunk_list); |
| 1274 | return result; |
| 1275 | } |
| 1276 | |
| 1277 | static int kgsl_cma_alloc_secure(struct kgsl_device *device, |
| 1278 | struct kgsl_memdesc *memdesc, uint64_t size) |
| 1279 | { |
| 1280 | struct kgsl_iommu *iommu = KGSL_IOMMU_PRIV(device); |
| 1281 | int result = 0; |
| 1282 | size_t aligned; |
| 1283 | |
| 1284 | /* Align size to 1M boundaries */ |
| 1285 | aligned = ALIGN(size, SZ_1M); |
| 1286 | |
| 1287 | /* The SCM call uses an unsigned int for the size */ |
| 1288 | if (aligned == 0 || aligned > UINT_MAX) |
| 1289 | return -EINVAL; |
| 1290 | |
| 1291 | /* |
| 1292 | * If there is more than a page gap between the requested size and the |
| 1293 | * aligned size we don't need to add more memory for a guard page. Yay! |
| 1294 | */ |
| 1295 | |
| 1296 | if (memdesc->priv & KGSL_MEMDESC_GUARD_PAGE) |
| 1297 | if (aligned - size >= SZ_4K) |
| 1298 | memdesc->priv &= ~KGSL_MEMDESC_GUARD_PAGE; |
| 1299 | |
| 1300 | memdesc->size = aligned; |
| 1301 | memdesc->ops = &kgsl_cma_ops; |
| 1302 | memdesc->dev = iommu->ctx[KGSL_IOMMU_CONTEXT_SECURE].dev; |
| 1303 | |
| 1304 | memdesc->attrs |= DMA_ATTR_STRONGLY_ORDERED; |
| 1305 | |
| 1306 | memdesc->hostptr = dma_alloc_attrs(memdesc->dev, aligned, |
| 1307 | &memdesc->physaddr, GFP_KERNEL, memdesc->attrs); |
| 1308 | |
| 1309 | if (memdesc->hostptr == NULL) { |
| 1310 | result = -ENOMEM; |
| 1311 | goto err; |
| 1312 | } |
| 1313 | |
| 1314 | result = memdesc_sg_dma(memdesc, memdesc->physaddr, aligned); |
| 1315 | if (result) |
| 1316 | goto err; |
| 1317 | |
| 1318 | result = scm_lock_chunk(memdesc, 1); |
| 1319 | |
| 1320 | if (result != 0) |
| 1321 | goto err; |
| 1322 | |
| 1323 | /* Set the private bit to indicate that we've secured this */ |
| 1324 | SetPagePrivate(sg_page(memdesc->sgt->sgl)); |
| 1325 | |
| 1326 | memdesc->priv |= KGSL_MEMDESC_TZ_LOCKED; |
| 1327 | |
| 1328 | /* Record statistics */ |
| 1329 | KGSL_STATS_ADD(aligned, &kgsl_driver.stats.secure, |
| 1330 | &kgsl_driver.stats.secure_max); |
| 1331 | err: |
| 1332 | if (result) |
| 1333 | kgsl_sharedmem_free(memdesc); |
| 1334 | |
| 1335 | return result; |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * kgsl_cma_unlock_secure() - Unlock secure memory by calling TZ |
| 1340 | * @memdesc: memory descriptor |
| 1341 | */ |
| 1342 | static void kgsl_cma_unlock_secure(struct kgsl_memdesc *memdesc) |
| 1343 | { |
| 1344 | if (memdesc->size == 0 || !(memdesc->priv & KGSL_MEMDESC_TZ_LOCKED)) |
| 1345 | return; |
| 1346 | |
| 1347 | if (!scm_lock_chunk(memdesc, 0)) |
| 1348 | ClearPagePrivate(sg_page(memdesc->sgt->sgl)); |
| 1349 | } |
| 1350 | |
| 1351 | void kgsl_sharedmem_set_noretry(bool val) |
| 1352 | { |
| 1353 | sharedmem_noretry_flag = val; |
| 1354 | } |
| 1355 | |
| 1356 | bool kgsl_sharedmem_get_noretry(void) |
| 1357 | { |
| 1358 | return sharedmem_noretry_flag; |
| 1359 | } |