Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Google, Inc. |
| 3 | * |
| 4 | * This software is licensed under the terms of the GNU General Public |
| 5 | * License version 2, as published by the Free Software Foundation, and |
| 6 | * may be copied, distributed, and modified under those terms. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/bitops.h> |
| 16 | #include <linux/circ_buf.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/poll.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/uaccess.h> |
| 22 | |
| 23 | #include <video/adf_client.h> |
| 24 | #include <video/adf_format.h> |
| 25 | |
| 26 | #include "sw_sync.h" |
| 27 | #include "sync.h" |
| 28 | |
| 29 | #include "adf.h" |
| 30 | #include "adf_fops.h" |
| 31 | #include "adf_sysfs.h" |
| 32 | |
| 33 | #ifdef CONFIG_COMPAT |
| 34 | #include "adf_fops32.h" |
| 35 | #endif |
| 36 | |
| 37 | static int adf_obj_set_event(struct adf_obj *obj, struct adf_file *file, |
| 38 | struct adf_set_event __user *arg) |
| 39 | { |
| 40 | struct adf_set_event data; |
| 41 | bool enabled; |
| 42 | unsigned long flags; |
| 43 | int err; |
| 44 | |
| 45 | if (copy_from_user(&data, arg, sizeof(data))) |
| 46 | return -EFAULT; |
| 47 | |
| 48 | err = adf_obj_check_supports_event(obj, data.type); |
| 49 | if (err < 0) |
| 50 | return err; |
| 51 | |
| 52 | spin_lock_irqsave(&obj->file_lock, flags); |
| 53 | if (data.enabled) |
| 54 | enabled = test_and_set_bit(data.type, |
| 55 | file->event_subscriptions); |
| 56 | else |
| 57 | enabled = test_and_clear_bit(data.type, |
| 58 | file->event_subscriptions); |
| 59 | spin_unlock_irqrestore(&obj->file_lock, flags); |
| 60 | |
| 61 | if (data.enabled == enabled) |
| 62 | return -EALREADY; |
| 63 | |
| 64 | if (data.enabled) |
| 65 | adf_event_get(obj, data.type); |
| 66 | else |
| 67 | adf_event_put(obj, data.type); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static int adf_obj_copy_custom_data_to_user(struct adf_obj *obj, |
| 73 | void __user *dst, size_t *dst_size) |
| 74 | { |
| 75 | void *custom_data; |
| 76 | size_t custom_data_size; |
| 77 | int ret; |
| 78 | |
| 79 | if (!obj->ops || !obj->ops->custom_data) { |
| 80 | dev_dbg(&obj->dev, "%s: no custom_data op\n", __func__); |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | custom_data = kzalloc(ADF_MAX_CUSTOM_DATA_SIZE, GFP_KERNEL); |
| 85 | if (!custom_data) |
| 86 | return -ENOMEM; |
| 87 | |
| 88 | ret = obj->ops->custom_data(obj, custom_data, &custom_data_size); |
| 89 | if (ret < 0) |
| 90 | goto done; |
| 91 | |
| 92 | if (copy_to_user(dst, custom_data, min(*dst_size, custom_data_size))) { |
| 93 | ret = -EFAULT; |
| 94 | goto done; |
| 95 | } |
| 96 | *dst_size = custom_data_size; |
| 97 | |
| 98 | done: |
| 99 | kfree(custom_data); |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | static int adf_eng_get_data(struct adf_overlay_engine *eng, |
| 104 | struct adf_overlay_engine_data __user *arg) |
| 105 | { |
| 106 | struct adf_device *dev = adf_overlay_engine_parent(eng); |
| 107 | struct adf_overlay_engine_data data; |
Greg Hackmann | 47017b1 | 2013-06-11 12:59:41 -0700 | [diff] [blame] | 108 | size_t n_supported_formats; |
| 109 | u32 *supported_formats = NULL; |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 110 | int ret = 0; |
| 111 | |
| 112 | if (copy_from_user(&data, arg, sizeof(data))) |
| 113 | return -EFAULT; |
| 114 | |
| 115 | strlcpy(data.name, eng->base.name, sizeof(data.name)); |
| 116 | |
Greg Hackmann | 47017b1 | 2013-06-11 12:59:41 -0700 | [diff] [blame] | 117 | if (data.n_supported_formats > ADF_MAX_SUPPORTED_FORMATS) |
| 118 | return -EINVAL; |
| 119 | |
| 120 | n_supported_formats = data.n_supported_formats; |
| 121 | data.n_supported_formats = eng->ops->n_supported_formats; |
| 122 | |
| 123 | if (n_supported_formats) { |
| 124 | supported_formats = kzalloc(n_supported_formats * |
| 125 | sizeof(supported_formats[0]), GFP_KERNEL); |
| 126 | if (!supported_formats) |
| 127 | return -ENOMEM; |
| 128 | } |
| 129 | |
| 130 | memcpy(supported_formats, eng->ops->supported_formats, |
| 131 | sizeof(u32) * min(n_supported_formats, |
| 132 | eng->ops->n_supported_formats)); |
| 133 | |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 134 | mutex_lock(&dev->client_lock); |
| 135 | ret = adf_obj_copy_custom_data_to_user(&eng->base, arg->custom_data, |
| 136 | &data.custom_data_size); |
| 137 | mutex_unlock(&dev->client_lock); |
| 138 | |
| 139 | if (ret < 0) |
Greg Hackmann | 47017b1 | 2013-06-11 12:59:41 -0700 | [diff] [blame] | 140 | goto done; |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 141 | |
Greg Hackmann | 47017b1 | 2013-06-11 12:59:41 -0700 | [diff] [blame] | 142 | if (copy_to_user(arg, &data, sizeof(data))) { |
| 143 | ret = -EFAULT; |
| 144 | goto done; |
| 145 | } |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 146 | |
Greg Hackmann | 47017b1 | 2013-06-11 12:59:41 -0700 | [diff] [blame] | 147 | if (supported_formats && copy_to_user(arg->supported_formats, |
| 148 | supported_formats, |
| 149 | n_supported_formats * sizeof(supported_formats[0]))) |
| 150 | ret = -EFAULT; |
| 151 | |
| 152 | done: |
| 153 | kfree(supported_formats); |
| 154 | return ret; |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | static int adf_buffer_import(struct adf_device *dev, |
| 158 | struct adf_buffer_config __user *cfg, struct adf_buffer *buf) |
| 159 | { |
| 160 | struct adf_buffer_config user_buf; |
| 161 | size_t i; |
| 162 | int ret = 0; |
| 163 | |
| 164 | if (copy_from_user(&user_buf, cfg, sizeof(user_buf))) |
| 165 | return -EFAULT; |
| 166 | |
| 167 | memset(buf, 0, sizeof(*buf)); |
| 168 | |
| 169 | if (user_buf.n_planes > ADF_MAX_PLANES) { |
| 170 | dev_err(&dev->base.dev, "invalid plane count %u\n", |
| 171 | user_buf.n_planes); |
| 172 | return -EINVAL; |
| 173 | } |
| 174 | |
| 175 | buf->overlay_engine = idr_find(&dev->overlay_engines, |
| 176 | user_buf.overlay_engine); |
| 177 | if (!buf->overlay_engine) { |
| 178 | dev_err(&dev->base.dev, "invalid overlay engine id %u\n", |
| 179 | user_buf.overlay_engine); |
| 180 | return -ENOENT; |
| 181 | } |
| 182 | |
| 183 | buf->w = user_buf.w; |
| 184 | buf->h = user_buf.h; |
| 185 | buf->format = user_buf.format; |
| 186 | for (i = 0; i < user_buf.n_planes; i++) { |
| 187 | buf->dma_bufs[i] = dma_buf_get(user_buf.fd[i]); |
| 188 | if (IS_ERR(buf->dma_bufs[i])) { |
| 189 | ret = PTR_ERR(buf->dma_bufs[i]); |
Greg Hackmann | 1d8124a | 2014-03-26 16:43:23 -0700 | [diff] [blame] | 190 | dev_err(&dev->base.dev, "importing dma_buf fd %d failed: %d\n", |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 191 | user_buf.fd[i], ret); |
| 192 | buf->dma_bufs[i] = NULL; |
| 193 | goto done; |
| 194 | } |
| 195 | buf->offset[i] = user_buf.offset[i]; |
| 196 | buf->pitch[i] = user_buf.pitch[i]; |
| 197 | } |
| 198 | buf->n_planes = user_buf.n_planes; |
| 199 | |
| 200 | if (user_buf.acquire_fence >= 0) { |
| 201 | buf->acquire_fence = sync_fence_fdget(user_buf.acquire_fence); |
| 202 | if (!buf->acquire_fence) { |
Greg Hackmann | 1d8124a | 2014-03-26 16:43:23 -0700 | [diff] [blame] | 203 | dev_err(&dev->base.dev, "getting fence fd %d failed\n", |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 204 | user_buf.acquire_fence); |
| 205 | ret = -EINVAL; |
| 206 | goto done; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | done: |
| 211 | if (ret < 0) |
| 212 | adf_buffer_cleanup(buf); |
| 213 | return ret; |
| 214 | } |
| 215 | |
| 216 | static int adf_device_post_config(struct adf_device *dev, |
| 217 | struct adf_post_config __user *arg) |
| 218 | { |
| 219 | struct sync_fence *complete_fence; |
| 220 | int complete_fence_fd; |
| 221 | struct adf_buffer *bufs = NULL; |
| 222 | struct adf_interface **intfs = NULL; |
| 223 | size_t n_intfs, n_bufs, i; |
| 224 | void *custom_data = NULL; |
| 225 | size_t custom_data_size; |
| 226 | int ret = 0; |
| 227 | |
Amit Pundir | 2262ee5 | 2015-07-07 01:09:40 +0530 | [diff] [blame^] | 228 | complete_fence_fd = get_unused_fd_flags(O_CLOEXEC); |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 229 | if (complete_fence_fd < 0) |
| 230 | return complete_fence_fd; |
| 231 | |
| 232 | if (get_user(n_intfs, &arg->n_interfaces)) { |
| 233 | ret = -EFAULT; |
| 234 | goto err_get_user; |
| 235 | } |
| 236 | |
| 237 | if (n_intfs > ADF_MAX_INTERFACES) { |
| 238 | ret = -EINVAL; |
| 239 | goto err_get_user; |
| 240 | } |
| 241 | |
| 242 | if (get_user(n_bufs, &arg->n_bufs)) { |
| 243 | ret = -EFAULT; |
| 244 | goto err_get_user; |
| 245 | } |
| 246 | |
| 247 | if (n_bufs > ADF_MAX_BUFFERS) { |
| 248 | ret = -EINVAL; |
| 249 | goto err_get_user; |
| 250 | } |
| 251 | |
| 252 | if (get_user(custom_data_size, &arg->custom_data_size)) { |
| 253 | ret = -EFAULT; |
| 254 | goto err_get_user; |
| 255 | } |
| 256 | |
| 257 | if (custom_data_size > ADF_MAX_CUSTOM_DATA_SIZE) { |
| 258 | ret = -EINVAL; |
| 259 | goto err_get_user; |
| 260 | } |
| 261 | |
| 262 | if (n_intfs) { |
| 263 | intfs = kmalloc(sizeof(intfs[0]) * n_intfs, GFP_KERNEL); |
| 264 | if (!intfs) { |
| 265 | ret = -ENOMEM; |
| 266 | goto err_get_user; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | for (i = 0; i < n_intfs; i++) { |
| 271 | u32 intf_id; |
| 272 | if (get_user(intf_id, &arg->interfaces[i])) { |
| 273 | ret = -EFAULT; |
| 274 | goto err_get_user; |
| 275 | } |
| 276 | |
| 277 | intfs[i] = idr_find(&dev->interfaces, intf_id); |
| 278 | if (!intfs[i]) { |
| 279 | ret = -EINVAL; |
| 280 | goto err_get_user; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | if (n_bufs) { |
| 285 | bufs = kzalloc(sizeof(bufs[0]) * n_bufs, GFP_KERNEL); |
| 286 | if (!bufs) { |
| 287 | ret = -ENOMEM; |
| 288 | goto err_get_user; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | for (i = 0; i < n_bufs; i++) { |
| 293 | ret = adf_buffer_import(dev, &arg->bufs[i], &bufs[i]); |
| 294 | if (ret < 0) { |
| 295 | memset(&bufs[i], 0, sizeof(bufs[i])); |
| 296 | goto err_import; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | if (custom_data_size) { |
| 301 | custom_data = kzalloc(custom_data_size, GFP_KERNEL); |
| 302 | if (!custom_data) { |
| 303 | ret = -ENOMEM; |
| 304 | goto err_import; |
| 305 | } |
| 306 | |
| 307 | if (copy_from_user(custom_data, arg->custom_data, |
| 308 | custom_data_size)) { |
| 309 | ret = -EFAULT; |
| 310 | goto err_import; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | if (put_user(complete_fence_fd, &arg->complete_fence)) { |
| 315 | ret = -EFAULT; |
| 316 | goto err_import; |
| 317 | } |
| 318 | |
| 319 | complete_fence = adf_device_post_nocopy(dev, intfs, n_intfs, bufs, |
| 320 | n_bufs, custom_data, custom_data_size); |
| 321 | if (IS_ERR(complete_fence)) { |
| 322 | ret = PTR_ERR(complete_fence); |
| 323 | goto err_import; |
| 324 | } |
| 325 | |
| 326 | sync_fence_install(complete_fence, complete_fence_fd); |
| 327 | return 0; |
| 328 | |
| 329 | err_import: |
| 330 | for (i = 0; i < n_bufs; i++) |
| 331 | adf_buffer_cleanup(&bufs[i]); |
| 332 | |
| 333 | err_get_user: |
| 334 | kfree(custom_data); |
| 335 | kfree(bufs); |
| 336 | kfree(intfs); |
| 337 | put_unused_fd(complete_fence_fd); |
| 338 | return ret; |
| 339 | } |
| 340 | |
Greg Hackmann | 949005d | 2013-10-10 13:03:26 -0700 | [diff] [blame] | 341 | static int adf_intf_simple_post_config(struct adf_interface *intf, |
| 342 | struct adf_simple_post_config __user *arg) |
| 343 | { |
| 344 | struct adf_device *dev = intf->base.parent; |
| 345 | struct sync_fence *complete_fence; |
| 346 | int complete_fence_fd; |
| 347 | struct adf_buffer buf; |
| 348 | int ret = 0; |
| 349 | |
Amit Pundir | 2262ee5 | 2015-07-07 01:09:40 +0530 | [diff] [blame^] | 350 | complete_fence_fd = get_unused_fd_flags(O_CLOEXEC); |
Greg Hackmann | 949005d | 2013-10-10 13:03:26 -0700 | [diff] [blame] | 351 | if (complete_fence_fd < 0) |
| 352 | return complete_fence_fd; |
| 353 | |
| 354 | ret = adf_buffer_import(dev, &arg->buf, &buf); |
| 355 | if (ret < 0) |
| 356 | goto err_import; |
| 357 | |
| 358 | if (put_user(complete_fence_fd, &arg->complete_fence)) { |
| 359 | ret = -EFAULT; |
| 360 | goto err_put_user; |
| 361 | } |
| 362 | |
| 363 | complete_fence = adf_interface_simple_post(intf, &buf); |
| 364 | if (IS_ERR(complete_fence)) { |
| 365 | ret = PTR_ERR(complete_fence); |
| 366 | goto err_put_user; |
| 367 | } |
| 368 | |
| 369 | sync_fence_install(complete_fence, complete_fence_fd); |
| 370 | return 0; |
| 371 | |
| 372 | err_put_user: |
| 373 | adf_buffer_cleanup(&buf); |
| 374 | err_import: |
| 375 | put_unused_fd(complete_fence_fd); |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | static int adf_intf_simple_buffer_alloc(struct adf_interface *intf, |
| 380 | struct adf_simple_buffer_alloc __user *arg) |
| 381 | { |
| 382 | struct adf_simple_buffer_alloc data; |
| 383 | struct dma_buf *dma_buf; |
| 384 | int ret = 0; |
| 385 | |
| 386 | if (copy_from_user(&data, arg, sizeof(data))) |
| 387 | return -EFAULT; |
| 388 | |
| 389 | data.fd = get_unused_fd_flags(O_CLOEXEC); |
| 390 | if (data.fd < 0) |
| 391 | return data.fd; |
| 392 | |
| 393 | ret = adf_interface_simple_buffer_alloc(intf, data.w, data.h, |
| 394 | data.format, &dma_buf, &data.offset, &data.pitch); |
| 395 | if (ret < 0) |
| 396 | goto err_alloc; |
| 397 | |
| 398 | if (copy_to_user(arg, &data, sizeof(*arg))) { |
| 399 | ret = -EFAULT; |
| 400 | goto err_copy; |
| 401 | } |
| 402 | |
| 403 | fd_install(data.fd, dma_buf->file); |
| 404 | return 0; |
| 405 | |
| 406 | err_copy: |
| 407 | dma_buf_put(dma_buf); |
| 408 | |
| 409 | err_alloc: |
| 410 | put_unused_fd(data.fd); |
| 411 | return ret; |
| 412 | } |
| 413 | |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 414 | static int adf_copy_attachment_list_to_user( |
| 415 | struct adf_attachment_config __user *to, size_t n_to, |
| 416 | struct adf_attachment *from, size_t n_from) |
| 417 | { |
| 418 | struct adf_attachment_config *temp; |
| 419 | size_t n = min(n_to, n_from); |
| 420 | size_t i; |
| 421 | int ret = 0; |
| 422 | |
| 423 | if (!n) |
| 424 | return 0; |
| 425 | |
| 426 | temp = kzalloc(n * sizeof(temp[0]), GFP_KERNEL); |
| 427 | if (!temp) |
| 428 | return -ENOMEM; |
| 429 | |
| 430 | for (i = 0; i < n; i++) { |
| 431 | temp[i].interface = from[i].interface->base.id; |
| 432 | temp[i].overlay_engine = from[i].overlay_engine->base.id; |
| 433 | } |
| 434 | |
| 435 | if (copy_to_user(to, temp, n * sizeof(to[0]))) { |
| 436 | ret = -EFAULT; |
| 437 | goto done; |
| 438 | } |
| 439 | |
| 440 | done: |
| 441 | kfree(temp); |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | static int adf_device_get_data(struct adf_device *dev, |
| 446 | struct adf_device_data __user *arg) |
| 447 | { |
| 448 | struct adf_device_data data; |
| 449 | size_t n_attach; |
| 450 | struct adf_attachment *attach = NULL; |
| 451 | size_t n_allowed_attach; |
| 452 | struct adf_attachment *allowed_attach = NULL; |
| 453 | int ret = 0; |
| 454 | |
| 455 | if (copy_from_user(&data, arg, sizeof(data))) |
| 456 | return -EFAULT; |
| 457 | |
| 458 | if (data.n_attachments > ADF_MAX_ATTACHMENTS || |
| 459 | data.n_allowed_attachments > ADF_MAX_ATTACHMENTS) |
| 460 | return -EINVAL; |
| 461 | |
| 462 | strlcpy(data.name, dev->base.name, sizeof(data.name)); |
| 463 | |
| 464 | if (data.n_attachments) { |
| 465 | attach = kzalloc(data.n_attachments * sizeof(attach[0]), |
| 466 | GFP_KERNEL); |
| 467 | if (!attach) |
| 468 | return -ENOMEM; |
| 469 | } |
| 470 | n_attach = adf_device_attachments(dev, attach, data.n_attachments); |
| 471 | |
| 472 | if (data.n_allowed_attachments) { |
| 473 | allowed_attach = kzalloc(data.n_allowed_attachments * |
| 474 | sizeof(allowed_attach[0]), GFP_KERNEL); |
| 475 | if (!allowed_attach) { |
| 476 | ret = -ENOMEM; |
| 477 | goto done; |
| 478 | } |
| 479 | } |
| 480 | n_allowed_attach = adf_device_attachments_allowed(dev, allowed_attach, |
| 481 | data.n_allowed_attachments); |
| 482 | |
| 483 | mutex_lock(&dev->client_lock); |
| 484 | ret = adf_obj_copy_custom_data_to_user(&dev->base, arg->custom_data, |
| 485 | &data.custom_data_size); |
| 486 | mutex_unlock(&dev->client_lock); |
| 487 | |
| 488 | if (ret < 0) |
| 489 | goto done; |
| 490 | |
| 491 | ret = adf_copy_attachment_list_to_user(arg->attachments, |
| 492 | data.n_attachments, attach, n_attach); |
| 493 | if (ret < 0) |
| 494 | goto done; |
| 495 | |
| 496 | ret = adf_copy_attachment_list_to_user(arg->allowed_attachments, |
| 497 | data.n_allowed_attachments, allowed_attach, |
| 498 | n_allowed_attach); |
| 499 | if (ret < 0) |
| 500 | goto done; |
| 501 | |
| 502 | data.n_attachments = n_attach; |
| 503 | data.n_allowed_attachments = n_allowed_attach; |
| 504 | |
| 505 | if (copy_to_user(arg, &data, sizeof(data))) |
| 506 | ret = -EFAULT; |
| 507 | |
| 508 | done: |
| 509 | kfree(allowed_attach); |
| 510 | kfree(attach); |
| 511 | return ret; |
| 512 | } |
| 513 | |
| 514 | static int adf_device_handle_attachment(struct adf_device *dev, |
| 515 | struct adf_attachment_config __user *arg, bool attach) |
| 516 | { |
| 517 | struct adf_attachment_config data; |
| 518 | struct adf_overlay_engine *eng; |
| 519 | struct adf_interface *intf; |
| 520 | |
| 521 | if (copy_from_user(&data, arg, sizeof(data))) |
| 522 | return -EFAULT; |
| 523 | |
| 524 | eng = idr_find(&dev->overlay_engines, data.overlay_engine); |
| 525 | if (!eng) { |
| 526 | dev_err(&dev->base.dev, "invalid overlay engine id %u\n", |
| 527 | data.overlay_engine); |
| 528 | return -EINVAL; |
| 529 | } |
| 530 | |
| 531 | intf = idr_find(&dev->interfaces, data.interface); |
| 532 | if (!intf) { |
| 533 | dev_err(&dev->base.dev, "invalid interface id %u\n", |
| 534 | data.interface); |
| 535 | return -EINVAL; |
| 536 | } |
| 537 | |
| 538 | if (attach) |
| 539 | return adf_device_attach(dev, eng, intf); |
| 540 | else |
| 541 | return adf_device_detach(dev, eng, intf); |
| 542 | } |
| 543 | |
| 544 | static int adf_intf_set_mode(struct adf_interface *intf, |
| 545 | struct drm_mode_modeinfo __user *arg) |
| 546 | { |
| 547 | struct drm_mode_modeinfo mode; |
| 548 | |
| 549 | if (copy_from_user(&mode, arg, sizeof(mode))) |
| 550 | return -EFAULT; |
| 551 | |
| 552 | return adf_interface_set_mode(intf, &mode); |
| 553 | } |
| 554 | |
| 555 | static int adf_intf_get_data(struct adf_interface *intf, |
| 556 | struct adf_interface_data __user *arg) |
| 557 | { |
| 558 | struct adf_device *dev = adf_interface_parent(intf); |
| 559 | struct adf_interface_data data; |
| 560 | struct drm_mode_modeinfo *modelist; |
| 561 | size_t modelist_size; |
| 562 | int err; |
| 563 | int ret = 0; |
| 564 | unsigned long flags; |
| 565 | |
| 566 | if (copy_from_user(&data, arg, sizeof(data))) |
| 567 | return -EFAULT; |
| 568 | |
| 569 | strlcpy(data.name, intf->base.name, sizeof(data.name)); |
| 570 | |
| 571 | data.type = intf->type; |
| 572 | data.id = intf->idx; |
Greg Hackmann | fd81dd3 | 2013-09-13 11:23:05 -0700 | [diff] [blame] | 573 | data.flags = intf->flags; |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 574 | |
| 575 | err = adf_interface_get_screen_size(intf, &data.width_mm, |
| 576 | &data.height_mm); |
| 577 | if (err < 0) { |
| 578 | data.width_mm = 0; |
| 579 | data.height_mm = 0; |
| 580 | } |
| 581 | |
| 582 | modelist = kmalloc(sizeof(modelist[0]) * ADF_MAX_MODES, GFP_KERNEL); |
| 583 | if (!modelist) |
| 584 | return -ENOMEM; |
| 585 | |
| 586 | mutex_lock(&dev->client_lock); |
| 587 | read_lock_irqsave(&intf->hotplug_modelist_lock, flags); |
| 588 | data.hotplug_detect = intf->hotplug_detect; |
| 589 | modelist_size = min(data.n_available_modes, intf->n_modes) * |
| 590 | sizeof(intf->modelist[0]); |
| 591 | memcpy(modelist, intf->modelist, modelist_size); |
| 592 | data.n_available_modes = intf->n_modes; |
| 593 | read_unlock_irqrestore(&intf->hotplug_modelist_lock, flags); |
| 594 | |
| 595 | if (copy_to_user(arg->available_modes, modelist, modelist_size)) { |
| 596 | ret = -EFAULT; |
| 597 | goto done; |
| 598 | } |
| 599 | |
| 600 | data.dpms_state = intf->dpms_state; |
| 601 | memcpy(&data.current_mode, &intf->current_mode, |
| 602 | sizeof(intf->current_mode)); |
| 603 | |
| 604 | ret = adf_obj_copy_custom_data_to_user(&intf->base, arg->custom_data, |
| 605 | &data.custom_data_size); |
| 606 | done: |
| 607 | mutex_unlock(&dev->client_lock); |
| 608 | kfree(modelist); |
| 609 | |
| 610 | if (ret < 0) |
| 611 | return ret; |
| 612 | |
| 613 | if (copy_to_user(arg, &data, sizeof(data))) |
| 614 | ret = -EFAULT; |
| 615 | |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | static inline long adf_obj_custom_ioctl(struct adf_obj *obj, unsigned int cmd, |
| 620 | unsigned long arg) |
| 621 | { |
| 622 | if (obj->ops && obj->ops->ioctl) |
| 623 | return obj->ops->ioctl(obj, cmd, arg); |
| 624 | return -ENOTTY; |
| 625 | } |
| 626 | |
| 627 | static long adf_overlay_engine_ioctl(struct adf_overlay_engine *eng, |
| 628 | struct adf_file *file, unsigned int cmd, unsigned long arg) |
| 629 | { |
| 630 | switch (cmd) { |
| 631 | case ADF_SET_EVENT: |
| 632 | return adf_obj_set_event(&eng->base, file, |
| 633 | (struct adf_set_event __user *)arg); |
| 634 | |
| 635 | case ADF_GET_OVERLAY_ENGINE_DATA: |
| 636 | return adf_eng_get_data(eng, |
| 637 | (struct adf_overlay_engine_data __user *)arg); |
| 638 | |
| 639 | case ADF_BLANK: |
| 640 | case ADF_POST_CONFIG: |
| 641 | case ADF_SET_MODE: |
| 642 | case ADF_GET_DEVICE_DATA: |
| 643 | case ADF_GET_INTERFACE_DATA: |
Greg Hackmann | 949005d | 2013-10-10 13:03:26 -0700 | [diff] [blame] | 644 | case ADF_SIMPLE_POST_CONFIG: |
| 645 | case ADF_SIMPLE_BUFFER_ALLOC: |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 646 | case ADF_ATTACH: |
| 647 | case ADF_DETACH: |
| 648 | return -EINVAL; |
| 649 | |
| 650 | default: |
| 651 | return adf_obj_custom_ioctl(&eng->base, cmd, arg); |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | static long adf_interface_ioctl(struct adf_interface *intf, |
| 656 | struct adf_file *file, unsigned int cmd, unsigned long arg) |
| 657 | { |
| 658 | switch (cmd) { |
| 659 | case ADF_SET_EVENT: |
| 660 | return adf_obj_set_event(&intf->base, file, |
| 661 | (struct adf_set_event __user *)arg); |
| 662 | |
| 663 | case ADF_BLANK: |
| 664 | return adf_interface_blank(intf, arg); |
| 665 | |
| 666 | case ADF_SET_MODE: |
| 667 | return adf_intf_set_mode(intf, |
| 668 | (struct drm_mode_modeinfo __user *)arg); |
| 669 | |
| 670 | case ADF_GET_INTERFACE_DATA: |
| 671 | return adf_intf_get_data(intf, |
| 672 | (struct adf_interface_data __user *)arg); |
| 673 | |
Greg Hackmann | 949005d | 2013-10-10 13:03:26 -0700 | [diff] [blame] | 674 | case ADF_SIMPLE_POST_CONFIG: |
| 675 | return adf_intf_simple_post_config(intf, |
| 676 | (struct adf_simple_post_config __user *)arg); |
| 677 | |
| 678 | case ADF_SIMPLE_BUFFER_ALLOC: |
| 679 | return adf_intf_simple_buffer_alloc(intf, |
| 680 | (struct adf_simple_buffer_alloc __user *)arg); |
| 681 | |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 682 | case ADF_POST_CONFIG: |
| 683 | case ADF_GET_DEVICE_DATA: |
| 684 | case ADF_GET_OVERLAY_ENGINE_DATA: |
| 685 | case ADF_ATTACH: |
| 686 | case ADF_DETACH: |
| 687 | return -EINVAL; |
| 688 | |
| 689 | default: |
| 690 | return adf_obj_custom_ioctl(&intf->base, cmd, arg); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | static long adf_device_ioctl(struct adf_device *dev, struct adf_file *file, |
| 695 | unsigned int cmd, unsigned long arg) |
| 696 | { |
| 697 | switch (cmd) { |
| 698 | case ADF_SET_EVENT: |
| 699 | return adf_obj_set_event(&dev->base, file, |
| 700 | (struct adf_set_event __user *)arg); |
| 701 | |
| 702 | case ADF_POST_CONFIG: |
| 703 | return adf_device_post_config(dev, |
| 704 | (struct adf_post_config __user *)arg); |
| 705 | |
| 706 | case ADF_GET_DEVICE_DATA: |
| 707 | return adf_device_get_data(dev, |
| 708 | (struct adf_device_data __user *)arg); |
| 709 | |
| 710 | case ADF_ATTACH: |
| 711 | return adf_device_handle_attachment(dev, |
| 712 | (struct adf_attachment_config __user *)arg, |
| 713 | true); |
| 714 | |
| 715 | case ADF_DETACH: |
| 716 | return adf_device_handle_attachment(dev, |
| 717 | (struct adf_attachment_config __user *)arg, |
| 718 | false); |
| 719 | |
| 720 | case ADF_BLANK: |
| 721 | case ADF_SET_MODE: |
| 722 | case ADF_GET_INTERFACE_DATA: |
| 723 | case ADF_GET_OVERLAY_ENGINE_DATA: |
Greg Hackmann | 949005d | 2013-10-10 13:03:26 -0700 | [diff] [blame] | 724 | case ADF_SIMPLE_POST_CONFIG: |
| 725 | case ADF_SIMPLE_BUFFER_ALLOC: |
Greg Hackmann | fc29df8 | 2013-05-22 14:23:10 -0700 | [diff] [blame] | 726 | return -EINVAL; |
| 727 | |
| 728 | default: |
| 729 | return adf_obj_custom_ioctl(&dev->base, cmd, arg); |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | static int adf_file_open(struct inode *inode, struct file *file) |
| 734 | { |
| 735 | struct adf_obj *obj; |
| 736 | struct adf_file *fpriv = NULL; |
| 737 | unsigned long flags; |
| 738 | int ret = 0; |
| 739 | |
| 740 | obj = adf_obj_sysfs_find(iminor(inode)); |
| 741 | if (!obj) |
| 742 | return -ENODEV; |
| 743 | |
| 744 | dev_dbg(&obj->dev, "opening %s\n", dev_name(&obj->dev)); |
| 745 | |
| 746 | if (!try_module_get(obj->parent->ops->owner)) { |
| 747 | dev_err(&obj->dev, "getting owner module failed\n"); |
| 748 | return -ENODEV; |
| 749 | } |
| 750 | |
| 751 | fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL); |
| 752 | if (!fpriv) { |
| 753 | ret = -ENOMEM; |
| 754 | goto done; |
| 755 | } |
| 756 | |
| 757 | INIT_LIST_HEAD(&fpriv->head); |
| 758 | fpriv->obj = obj; |
| 759 | init_waitqueue_head(&fpriv->event_wait); |
| 760 | |
| 761 | file->private_data = fpriv; |
| 762 | |
| 763 | if (obj->ops && obj->ops->open) { |
| 764 | ret = obj->ops->open(obj, inode, file); |
| 765 | if (ret < 0) |
| 766 | goto done; |
| 767 | } |
| 768 | |
| 769 | spin_lock_irqsave(&obj->file_lock, flags); |
| 770 | list_add_tail(&fpriv->head, &obj->file_list); |
| 771 | spin_unlock_irqrestore(&obj->file_lock, flags); |
| 772 | |
| 773 | done: |
| 774 | if (ret < 0) { |
| 775 | kfree(fpriv); |
| 776 | module_put(obj->parent->ops->owner); |
| 777 | } |
| 778 | return ret; |
| 779 | } |
| 780 | |
| 781 | static int adf_file_release(struct inode *inode, struct file *file) |
| 782 | { |
| 783 | struct adf_file *fpriv = file->private_data; |
| 784 | struct adf_obj *obj = fpriv->obj; |
| 785 | enum adf_event_type event_type; |
| 786 | unsigned long flags; |
| 787 | |
| 788 | if (obj->ops && obj->ops->release) |
| 789 | obj->ops->release(obj, inode, file); |
| 790 | |
| 791 | spin_lock_irqsave(&obj->file_lock, flags); |
| 792 | list_del(&fpriv->head); |
| 793 | spin_unlock_irqrestore(&obj->file_lock, flags); |
| 794 | |
| 795 | for_each_set_bit(event_type, fpriv->event_subscriptions, |
| 796 | ADF_EVENT_TYPE_MAX) { |
| 797 | adf_event_put(obj, event_type); |
| 798 | } |
| 799 | |
| 800 | kfree(fpriv); |
| 801 | module_put(obj->parent->ops->owner); |
| 802 | |
| 803 | dev_dbg(&obj->dev, "released %s\n", dev_name(&obj->dev)); |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | long adf_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 808 | { |
| 809 | struct adf_file *fpriv = file->private_data; |
| 810 | struct adf_obj *obj = fpriv->obj; |
| 811 | long ret = -EINVAL; |
| 812 | |
| 813 | dev_dbg(&obj->dev, "%s ioctl %u\n", dev_name(&obj->dev), _IOC_NR(cmd)); |
| 814 | |
| 815 | switch (obj->type) { |
| 816 | case ADF_OBJ_OVERLAY_ENGINE: |
| 817 | ret = adf_overlay_engine_ioctl(adf_obj_to_overlay_engine(obj), |
| 818 | fpriv, cmd, arg); |
| 819 | break; |
| 820 | |
| 821 | case ADF_OBJ_INTERFACE: |
| 822 | ret = adf_interface_ioctl(adf_obj_to_interface(obj), fpriv, cmd, |
| 823 | arg); |
| 824 | break; |
| 825 | |
| 826 | case ADF_OBJ_DEVICE: |
| 827 | ret = adf_device_ioctl(adf_obj_to_device(obj), fpriv, cmd, arg); |
| 828 | break; |
| 829 | } |
| 830 | |
| 831 | return ret; |
| 832 | } |
| 833 | |
| 834 | static inline bool adf_file_event_available(struct adf_file *fpriv) |
| 835 | { |
| 836 | int head = fpriv->event_head; |
| 837 | int tail = fpriv->event_tail; |
| 838 | return CIRC_CNT(head, tail, sizeof(fpriv->event_buf)) != 0; |
| 839 | } |
| 840 | |
| 841 | void adf_file_queue_event(struct adf_file *fpriv, struct adf_event *event) |
| 842 | { |
| 843 | int head = fpriv->event_head; |
| 844 | int tail = fpriv->event_tail; |
| 845 | size_t space = CIRC_SPACE(head, tail, sizeof(fpriv->event_buf)); |
| 846 | size_t space_to_end = |
| 847 | CIRC_SPACE_TO_END(head, tail, sizeof(fpriv->event_buf)); |
| 848 | |
| 849 | if (space < event->length) { |
| 850 | dev_dbg(&fpriv->obj->dev, |
| 851 | "insufficient buffer space for event %u\n", |
| 852 | event->type); |
| 853 | return; |
| 854 | } |
| 855 | |
| 856 | if (space_to_end >= event->length) { |
| 857 | memcpy(fpriv->event_buf + head, event, event->length); |
| 858 | } else { |
| 859 | memcpy(fpriv->event_buf + head, event, space_to_end); |
| 860 | memcpy(fpriv->event_buf, (u8 *)event + space_to_end, |
| 861 | event->length - space_to_end); |
| 862 | } |
| 863 | |
| 864 | smp_wmb(); |
| 865 | fpriv->event_head = (fpriv->event_head + event->length) & |
| 866 | (sizeof(fpriv->event_buf) - 1); |
| 867 | wake_up_interruptible_all(&fpriv->event_wait); |
| 868 | } |
| 869 | |
| 870 | static ssize_t adf_file_copy_to_user(struct adf_file *fpriv, |
| 871 | char __user *buffer, size_t buffer_size) |
| 872 | { |
| 873 | int head, tail; |
| 874 | u8 *event_buf; |
| 875 | size_t cnt, cnt_to_end, copy_size = 0; |
| 876 | ssize_t ret = 0; |
| 877 | unsigned long flags; |
| 878 | |
| 879 | event_buf = kmalloc(min(buffer_size, sizeof(fpriv->event_buf)), |
| 880 | GFP_KERNEL); |
| 881 | if (!event_buf) |
| 882 | return -ENOMEM; |
| 883 | |
| 884 | spin_lock_irqsave(&fpriv->obj->file_lock, flags); |
| 885 | |
| 886 | if (!adf_file_event_available(fpriv)) |
| 887 | goto out; |
| 888 | |
| 889 | head = fpriv->event_head; |
| 890 | tail = fpriv->event_tail; |
| 891 | |
| 892 | cnt = CIRC_CNT(head, tail, sizeof(fpriv->event_buf)); |
| 893 | cnt_to_end = CIRC_CNT_TO_END(head, tail, sizeof(fpriv->event_buf)); |
| 894 | copy_size = min(buffer_size, cnt); |
| 895 | |
| 896 | if (cnt_to_end >= copy_size) { |
| 897 | memcpy(event_buf, fpriv->event_buf + tail, copy_size); |
| 898 | } else { |
| 899 | memcpy(event_buf, fpriv->event_buf + tail, cnt_to_end); |
| 900 | memcpy(event_buf + cnt_to_end, fpriv->event_buf, |
| 901 | copy_size - cnt_to_end); |
| 902 | } |
| 903 | |
| 904 | fpriv->event_tail = (fpriv->event_tail + copy_size) & |
| 905 | (sizeof(fpriv->event_buf) - 1); |
| 906 | |
| 907 | out: |
| 908 | spin_unlock_irqrestore(&fpriv->obj->file_lock, flags); |
| 909 | if (copy_size) { |
| 910 | if (copy_to_user(buffer, event_buf, copy_size)) |
| 911 | ret = -EFAULT; |
| 912 | else |
| 913 | ret = copy_size; |
| 914 | } |
| 915 | kfree(event_buf); |
| 916 | return ret; |
| 917 | } |
| 918 | |
| 919 | ssize_t adf_file_read(struct file *filp, char __user *buffer, |
| 920 | size_t count, loff_t *offset) |
| 921 | { |
| 922 | struct adf_file *fpriv = filp->private_data; |
| 923 | int err; |
| 924 | |
| 925 | err = wait_event_interruptible(fpriv->event_wait, |
| 926 | adf_file_event_available(fpriv)); |
| 927 | if (err < 0) |
| 928 | return err; |
| 929 | |
| 930 | return adf_file_copy_to_user(fpriv, buffer, count); |
| 931 | } |
| 932 | |
| 933 | unsigned int adf_file_poll(struct file *filp, struct poll_table_struct *wait) |
| 934 | { |
| 935 | struct adf_file *fpriv = filp->private_data; |
| 936 | unsigned int mask = 0; |
| 937 | |
| 938 | poll_wait(filp, &fpriv->event_wait, wait); |
| 939 | |
| 940 | if (adf_file_event_available(fpriv)) |
| 941 | mask |= POLLIN | POLLRDNORM; |
| 942 | |
| 943 | return mask; |
| 944 | } |
| 945 | |
| 946 | const struct file_operations adf_fops = { |
| 947 | .owner = THIS_MODULE, |
| 948 | .unlocked_ioctl = adf_file_ioctl, |
| 949 | #ifdef CONFIG_COMPAT |
| 950 | .compat_ioctl = adf_file_compat_ioctl, |
| 951 | #endif |
| 952 | .open = adf_file_open, |
| 953 | .release = adf_file_release, |
| 954 | .llseek = default_llseek, |
| 955 | .read = adf_file_read, |
| 956 | .poll = adf_file_poll, |
| 957 | }; |