Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 1 | /* |
| 2 | * NVIDIA Tegra DRM GEM helper functions |
| 3 | * |
| 4 | * Copyright (C) 2012 Sascha Hauer, Pengutronix |
| 5 | * Copyright (C) 2013 NVIDIA CORPORATION, All rights reserved. |
| 6 | * |
| 7 | * Based on the GEM/CMA helpers |
| 8 | * |
| 9 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
| 10 | * |
Thierry Reding | 9a2ac2d | 2014-02-11 15:52:01 +0100 | [diff] [blame] | 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 14 | */ |
| 15 | |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 16 | #include <linux/dma-buf.h> |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 17 | #include <drm/tegra_drm.h> |
| 18 | |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 19 | #include "gem.h" |
| 20 | |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 21 | static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo) |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 22 | { |
| 23 | return container_of(bo, struct tegra_bo, base); |
| 24 | } |
| 25 | |
| 26 | static void tegra_bo_put(struct host1x_bo *bo) |
| 27 | { |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 28 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 29 | struct drm_device *drm = obj->gem.dev; |
| 30 | |
| 31 | mutex_lock(&drm->struct_mutex); |
| 32 | drm_gem_object_unreference(&obj->gem); |
| 33 | mutex_unlock(&drm->struct_mutex); |
| 34 | } |
| 35 | |
| 36 | static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt) |
| 37 | { |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 38 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 39 | |
| 40 | return obj->paddr; |
| 41 | } |
| 42 | |
| 43 | static void tegra_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt) |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | static void *tegra_bo_mmap(struct host1x_bo *bo) |
| 48 | { |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 49 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 50 | |
| 51 | return obj->vaddr; |
| 52 | } |
| 53 | |
| 54 | static void tegra_bo_munmap(struct host1x_bo *bo, void *addr) |
| 55 | { |
| 56 | } |
| 57 | |
| 58 | static void *tegra_bo_kmap(struct host1x_bo *bo, unsigned int page) |
| 59 | { |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 60 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 61 | |
| 62 | return obj->vaddr + page * PAGE_SIZE; |
| 63 | } |
| 64 | |
| 65 | static void tegra_bo_kunmap(struct host1x_bo *bo, unsigned int page, |
| 66 | void *addr) |
| 67 | { |
| 68 | } |
| 69 | |
| 70 | static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo) |
| 71 | { |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 72 | struct tegra_bo *obj = host1x_to_tegra_bo(bo); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 73 | struct drm_device *drm = obj->gem.dev; |
| 74 | |
| 75 | mutex_lock(&drm->struct_mutex); |
| 76 | drm_gem_object_reference(&obj->gem); |
| 77 | mutex_unlock(&drm->struct_mutex); |
| 78 | |
| 79 | return bo; |
| 80 | } |
| 81 | |
Thierry Reding | 425c0fd | 2013-12-12 10:10:46 +0100 | [diff] [blame] | 82 | static const struct host1x_bo_ops tegra_bo_ops = { |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 83 | .get = tegra_bo_get, |
| 84 | .put = tegra_bo_put, |
| 85 | .pin = tegra_bo_pin, |
| 86 | .unpin = tegra_bo_unpin, |
| 87 | .mmap = tegra_bo_mmap, |
| 88 | .munmap = tegra_bo_munmap, |
| 89 | .kmap = tegra_bo_kmap, |
| 90 | .kunmap = tegra_bo_kunmap, |
| 91 | }; |
| 92 | |
| 93 | static void tegra_bo_destroy(struct drm_device *drm, struct tegra_bo *bo) |
| 94 | { |
| 95 | dma_free_writecombine(drm->dev, bo->gem.size, bo->vaddr, bo->paddr); |
| 96 | } |
| 97 | |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 98 | struct tegra_bo *tegra_bo_create(struct drm_device *drm, unsigned int size, |
| 99 | unsigned long flags) |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 100 | { |
| 101 | struct tegra_bo *bo; |
| 102 | int err; |
| 103 | |
| 104 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
| 105 | if (!bo) |
| 106 | return ERR_PTR(-ENOMEM); |
| 107 | |
| 108 | host1x_bo_init(&bo->base, &tegra_bo_ops); |
| 109 | size = round_up(size, PAGE_SIZE); |
| 110 | |
| 111 | bo->vaddr = dma_alloc_writecombine(drm->dev, size, &bo->paddr, |
| 112 | GFP_KERNEL | __GFP_NOWARN); |
| 113 | if (!bo->vaddr) { |
| 114 | dev_err(drm->dev, "failed to allocate buffer with size %u\n", |
| 115 | size); |
| 116 | err = -ENOMEM; |
| 117 | goto err_dma; |
| 118 | } |
| 119 | |
| 120 | err = drm_gem_object_init(drm, &bo->gem, size); |
| 121 | if (err) |
| 122 | goto err_init; |
| 123 | |
| 124 | err = drm_gem_create_mmap_offset(&bo->gem); |
| 125 | if (err) |
| 126 | goto err_mmap; |
| 127 | |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 128 | if (flags & DRM_TEGRA_GEM_CREATE_TILED) |
| 129 | bo->flags |= TEGRA_BO_TILED; |
| 130 | |
Thierry Reding | db7fbdf | 2013-10-07 09:47:58 +0200 | [diff] [blame] | 131 | if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP) |
| 132 | bo->flags |= TEGRA_BO_BOTTOM_UP; |
| 133 | |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 134 | return bo; |
| 135 | |
| 136 | err_mmap: |
| 137 | drm_gem_object_release(&bo->gem); |
| 138 | err_init: |
| 139 | tegra_bo_destroy(drm, bo); |
| 140 | err_dma: |
| 141 | kfree(bo); |
| 142 | |
| 143 | return ERR_PTR(err); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file, |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 147 | struct drm_device *drm, |
| 148 | unsigned int size, |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 149 | unsigned long flags, |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 150 | unsigned int *handle) |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 151 | { |
| 152 | struct tegra_bo *bo; |
| 153 | int ret; |
| 154 | |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 155 | bo = tegra_bo_create(drm, size, flags); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 156 | if (IS_ERR(bo)) |
| 157 | return bo; |
| 158 | |
| 159 | ret = drm_gem_handle_create(file, &bo->gem, handle); |
| 160 | if (ret) |
| 161 | goto err; |
| 162 | |
| 163 | drm_gem_object_unreference_unlocked(&bo->gem); |
| 164 | |
| 165 | return bo; |
| 166 | |
| 167 | err: |
| 168 | tegra_bo_free_object(&bo->gem); |
| 169 | return ERR_PTR(ret); |
| 170 | } |
| 171 | |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 172 | struct tegra_bo *tegra_bo_import(struct drm_device *drm, struct dma_buf *buf) |
| 173 | { |
| 174 | struct dma_buf_attachment *attach; |
| 175 | struct tegra_bo *bo; |
| 176 | ssize_t size; |
| 177 | int err; |
| 178 | |
| 179 | bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
| 180 | if (!bo) |
| 181 | return ERR_PTR(-ENOMEM); |
| 182 | |
| 183 | host1x_bo_init(&bo->base, &tegra_bo_ops); |
| 184 | size = round_up(buf->size, PAGE_SIZE); |
| 185 | |
| 186 | err = drm_gem_object_init(drm, &bo->gem, size); |
| 187 | if (err < 0) |
| 188 | goto free; |
| 189 | |
| 190 | err = drm_gem_create_mmap_offset(&bo->gem); |
| 191 | if (err < 0) |
| 192 | goto release; |
| 193 | |
| 194 | attach = dma_buf_attach(buf, drm->dev); |
| 195 | if (IS_ERR(attach)) { |
| 196 | err = PTR_ERR(attach); |
| 197 | goto free_mmap; |
| 198 | } |
| 199 | |
| 200 | get_dma_buf(buf); |
| 201 | |
| 202 | bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); |
| 203 | if (!bo->sgt) { |
| 204 | err = -ENOMEM; |
| 205 | goto detach; |
| 206 | } |
| 207 | |
| 208 | if (IS_ERR(bo->sgt)) { |
| 209 | err = PTR_ERR(bo->sgt); |
| 210 | goto detach; |
| 211 | } |
| 212 | |
| 213 | if (bo->sgt->nents > 1) { |
| 214 | err = -EINVAL; |
| 215 | goto detach; |
| 216 | } |
| 217 | |
| 218 | bo->paddr = sg_dma_address(bo->sgt->sgl); |
| 219 | bo->gem.import_attach = attach; |
| 220 | |
| 221 | return bo; |
| 222 | |
| 223 | detach: |
| 224 | if (!IS_ERR_OR_NULL(bo->sgt)) |
| 225 | dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE); |
| 226 | |
| 227 | dma_buf_detach(buf, attach); |
| 228 | dma_buf_put(buf); |
| 229 | free_mmap: |
| 230 | drm_gem_free_mmap_offset(&bo->gem); |
| 231 | release: |
| 232 | drm_gem_object_release(&bo->gem); |
| 233 | free: |
| 234 | kfree(bo); |
| 235 | |
| 236 | return ERR_PTR(err); |
| 237 | } |
| 238 | |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 239 | void tegra_bo_free_object(struct drm_gem_object *gem) |
| 240 | { |
| 241 | struct tegra_bo *bo = to_tegra_bo(gem); |
| 242 | |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 243 | if (gem->import_attach) { |
| 244 | dma_buf_unmap_attachment(gem->import_attach, bo->sgt, |
| 245 | DMA_TO_DEVICE); |
| 246 | drm_prime_gem_destroy(gem, NULL); |
| 247 | } else { |
| 248 | tegra_bo_destroy(gem->dev, bo); |
| 249 | } |
| 250 | |
David Herrmann | 0de2397 | 2013-07-24 21:07:52 +0200 | [diff] [blame] | 251 | drm_gem_free_mmap_offset(gem); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 252 | drm_gem_object_release(gem); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 253 | |
| 254 | kfree(bo); |
| 255 | } |
| 256 | |
| 257 | int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm, |
| 258 | struct drm_mode_create_dumb *args) |
| 259 | { |
| 260 | int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
| 261 | struct tegra_bo *bo; |
| 262 | |
| 263 | if (args->pitch < min_pitch) |
| 264 | args->pitch = min_pitch; |
| 265 | |
| 266 | if (args->size < args->pitch * args->height) |
| 267 | args->size = args->pitch * args->height; |
| 268 | |
Thierry Reding | 773af77 | 2013-10-04 22:34:01 +0200 | [diff] [blame] | 269 | bo = tegra_bo_create_with_handle(file, drm, args->size, 0, |
Thierry Reding | 3be8274 | 2013-09-24 16:34:05 +0200 | [diff] [blame] | 270 | &args->handle); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 271 | if (IS_ERR(bo)) |
| 272 | return PTR_ERR(bo); |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm, |
| 278 | uint32_t handle, uint64_t *offset) |
| 279 | { |
| 280 | struct drm_gem_object *gem; |
| 281 | struct tegra_bo *bo; |
| 282 | |
| 283 | mutex_lock(&drm->struct_mutex); |
| 284 | |
| 285 | gem = drm_gem_object_lookup(drm, file, handle); |
| 286 | if (!gem) { |
| 287 | dev_err(drm->dev, "failed to lookup GEM object\n"); |
| 288 | mutex_unlock(&drm->struct_mutex); |
| 289 | return -EINVAL; |
| 290 | } |
| 291 | |
| 292 | bo = to_tegra_bo(gem); |
| 293 | |
David Herrmann | 2bc7b0c | 2013-08-13 14:19:58 +0200 | [diff] [blame] | 294 | *offset = drm_vma_node_offset_addr(&bo->gem.vma_node); |
Arto Merilainen | de2ba66 | 2013-03-22 16:34:08 +0200 | [diff] [blame] | 295 | |
| 296 | drm_gem_object_unreference(gem); |
| 297 | |
| 298 | mutex_unlock(&drm->struct_mutex); |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | const struct vm_operations_struct tegra_bo_vm_ops = { |
| 304 | .open = drm_gem_vm_open, |
| 305 | .close = drm_gem_vm_close, |
| 306 | }; |
| 307 | |
| 308 | int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) |
| 309 | { |
| 310 | struct drm_gem_object *gem; |
| 311 | struct tegra_bo *bo; |
| 312 | int ret; |
| 313 | |
| 314 | ret = drm_gem_mmap(file, vma); |
| 315 | if (ret) |
| 316 | return ret; |
| 317 | |
| 318 | gem = vma->vm_private_data; |
| 319 | bo = to_tegra_bo(gem); |
| 320 | |
| 321 | ret = remap_pfn_range(vma, vma->vm_start, bo->paddr >> PAGE_SHIFT, |
| 322 | vma->vm_end - vma->vm_start, vma->vm_page_prot); |
| 323 | if (ret) |
| 324 | drm_gem_vm_close(vma); |
| 325 | |
| 326 | return ret; |
| 327 | } |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 328 | |
| 329 | static struct sg_table * |
| 330 | tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, |
| 331 | enum dma_data_direction dir) |
| 332 | { |
| 333 | struct drm_gem_object *gem = attach->dmabuf->priv; |
| 334 | struct tegra_bo *bo = to_tegra_bo(gem); |
| 335 | struct sg_table *sgt; |
| 336 | |
| 337 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); |
| 338 | if (!sgt) |
| 339 | return NULL; |
| 340 | |
| 341 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) { |
| 342 | kfree(sgt); |
| 343 | return NULL; |
| 344 | } |
| 345 | |
| 346 | sg_dma_address(sgt->sgl) = bo->paddr; |
| 347 | sg_dma_len(sgt->sgl) = gem->size; |
| 348 | |
| 349 | return sgt; |
| 350 | } |
| 351 | |
| 352 | static void tegra_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, |
| 353 | struct sg_table *sgt, |
| 354 | enum dma_data_direction dir) |
| 355 | { |
| 356 | sg_free_table(sgt); |
| 357 | kfree(sgt); |
| 358 | } |
| 359 | |
| 360 | static void tegra_gem_prime_release(struct dma_buf *buf) |
| 361 | { |
| 362 | drm_gem_dmabuf_release(buf); |
| 363 | } |
| 364 | |
| 365 | static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf, |
| 366 | unsigned long page) |
| 367 | { |
| 368 | return NULL; |
| 369 | } |
| 370 | |
| 371 | static void tegra_gem_prime_kunmap_atomic(struct dma_buf *buf, |
| 372 | unsigned long page, |
| 373 | void *addr) |
| 374 | { |
| 375 | } |
| 376 | |
| 377 | static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page) |
| 378 | { |
| 379 | return NULL; |
| 380 | } |
| 381 | |
| 382 | static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page, |
| 383 | void *addr) |
| 384 | { |
| 385 | } |
| 386 | |
| 387 | static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma) |
| 388 | { |
| 389 | return -EINVAL; |
| 390 | } |
| 391 | |
Thierry Reding | d40326f | 2014-01-29 20:32:33 +0100 | [diff] [blame] | 392 | static void *tegra_gem_prime_vmap(struct dma_buf *buf) |
| 393 | { |
| 394 | struct drm_gem_object *gem = buf->priv; |
| 395 | struct tegra_bo *bo = to_tegra_bo(gem); |
| 396 | |
| 397 | return bo->vaddr; |
| 398 | } |
| 399 | |
| 400 | static void tegra_gem_prime_vunmap(struct dma_buf *buf, void *vaddr) |
| 401 | { |
| 402 | } |
| 403 | |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 404 | static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { |
| 405 | .map_dma_buf = tegra_gem_prime_map_dma_buf, |
| 406 | .unmap_dma_buf = tegra_gem_prime_unmap_dma_buf, |
| 407 | .release = tegra_gem_prime_release, |
| 408 | .kmap_atomic = tegra_gem_prime_kmap_atomic, |
| 409 | .kunmap_atomic = tegra_gem_prime_kunmap_atomic, |
| 410 | .kmap = tegra_gem_prime_kmap, |
| 411 | .kunmap = tegra_gem_prime_kunmap, |
| 412 | .mmap = tegra_gem_prime_mmap, |
Thierry Reding | d40326f | 2014-01-29 20:32:33 +0100 | [diff] [blame] | 413 | .vmap = tegra_gem_prime_vmap, |
| 414 | .vunmap = tegra_gem_prime_vunmap, |
Thierry Reding | 3800391 | 2013-12-12 10:00:43 +0100 | [diff] [blame] | 415 | }; |
| 416 | |
| 417 | struct dma_buf *tegra_gem_prime_export(struct drm_device *drm, |
| 418 | struct drm_gem_object *gem, |
| 419 | int flags) |
| 420 | { |
| 421 | return dma_buf_export(gem, &tegra_gem_prime_dmabuf_ops, gem->size, |
| 422 | flags); |
| 423 | } |
| 424 | |
| 425 | struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm, |
| 426 | struct dma_buf *buf) |
| 427 | { |
| 428 | struct tegra_bo *bo; |
| 429 | |
| 430 | if (buf->ops == &tegra_gem_prime_dmabuf_ops) { |
| 431 | struct drm_gem_object *gem = buf->priv; |
| 432 | |
| 433 | if (gem->dev == drm) { |
| 434 | drm_gem_object_reference(gem); |
| 435 | return gem; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | bo = tegra_bo_import(drm, buf); |
| 440 | if (IS_ERR(bo)) |
| 441 | return ERR_CAST(bo); |
| 442 | |
| 443 | return &bo->gem; |
| 444 | } |