11c248b7dSInki Dae /* exynos_drm_gem.c 21c248b7dSInki Dae * 31c248b7dSInki Dae * Copyright (c) 2011 Samsung Electronics Co., Ltd. 41c248b7dSInki Dae * Author: Inki Dae <inki.dae@samsung.com> 51c248b7dSInki Dae * 61c248b7dSInki Dae * Permission is hereby granted, free of charge, to any person obtaining a 71c248b7dSInki Dae * copy of this software and associated documentation files (the "Software"), 81c248b7dSInki Dae * to deal in the Software without restriction, including without limitation 91c248b7dSInki Dae * the rights to use, copy, modify, merge, publish, distribute, sublicense, 101c248b7dSInki Dae * and/or sell copies of the Software, and to permit persons to whom the 111c248b7dSInki Dae * Software is furnished to do so, subject to the following conditions: 121c248b7dSInki Dae * 131c248b7dSInki Dae * The above copyright notice and this permission notice (including the next 141c248b7dSInki Dae * paragraph) shall be included in all copies or substantial portions of the 151c248b7dSInki Dae * Software. 161c248b7dSInki Dae * 171c248b7dSInki Dae * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 181c248b7dSInki Dae * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 191c248b7dSInki Dae * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 201c248b7dSInki Dae * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 211c248b7dSInki Dae * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 221c248b7dSInki Dae * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 231c248b7dSInki Dae * OTHER DEALINGS IN THE SOFTWARE. 241c248b7dSInki Dae */ 251c248b7dSInki Dae 26760285e7SDavid Howells #include <drm/drmP.h> 271c248b7dSInki Dae 282b35892eSInki Dae #include <linux/shmem_fs.h> 291c248b7dSInki Dae #include <drm/exynos_drm.h> 301c248b7dSInki Dae 311c248b7dSInki Dae #include "exynos_drm_drv.h" 321c248b7dSInki Dae #include "exynos_drm_gem.h" 331c248b7dSInki Dae #include "exynos_drm_buf.h" 341c248b7dSInki Dae 351c248b7dSInki Dae static unsigned int convert_to_vm_err_msg(int msg) 361c248b7dSInki Dae { 371c248b7dSInki Dae unsigned int out_msg; 381c248b7dSInki Dae 391c248b7dSInki Dae switch (msg) { 401c248b7dSInki Dae case 0: 411c248b7dSInki Dae case -ERESTARTSYS: 421c248b7dSInki Dae case -EINTR: 431c248b7dSInki Dae out_msg = VM_FAULT_NOPAGE; 441c248b7dSInki Dae break; 451c248b7dSInki Dae 461c248b7dSInki Dae case -ENOMEM: 471c248b7dSInki Dae out_msg = VM_FAULT_OOM; 481c248b7dSInki Dae break; 491c248b7dSInki Dae 501c248b7dSInki Dae default: 511c248b7dSInki Dae out_msg = VM_FAULT_SIGBUS; 521c248b7dSInki Dae break; 531c248b7dSInki Dae } 541c248b7dSInki Dae 551c248b7dSInki Dae return out_msg; 561c248b7dSInki Dae } 571c248b7dSInki Dae 58dcf9af82SInki Dae static int check_gem_flags(unsigned int flags) 592b35892eSInki Dae { 60dcf9af82SInki Dae if (flags & ~(EXYNOS_BO_MASK)) { 61dcf9af82SInki Dae DRM_ERROR("invalid flags.\n"); 62dcf9af82SInki Dae return -EINVAL; 63dcf9af82SInki Dae } 64dcf9af82SInki Dae 65dcf9af82SInki Dae return 0; 66dcf9af82SInki Dae } 67dcf9af82SInki Dae 68c01d73faSInki Dae static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, 69c01d73faSInki Dae struct vm_area_struct *vma) 70c01d73faSInki Dae { 71c01d73faSInki Dae DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); 72c01d73faSInki Dae 73c01d73faSInki Dae /* non-cachable as default. */ 74c01d73faSInki Dae if (obj->flags & EXYNOS_BO_CACHABLE) 75c01d73faSInki Dae vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 76c01d73faSInki Dae else if (obj->flags & EXYNOS_BO_WC) 77c01d73faSInki Dae vma->vm_page_prot = 78c01d73faSInki Dae pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 79c01d73faSInki Dae else 80c01d73faSInki Dae vma->vm_page_prot = 81c01d73faSInki Dae pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 82c01d73faSInki Dae } 83c01d73faSInki Dae 84dcf9af82SInki Dae static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) 85dcf9af82SInki Dae { 860519f9a1SInki Dae /* TODO */ 870519f9a1SInki Dae 88dcf9af82SInki Dae return roundup(size, PAGE_SIZE); 892b35892eSInki Dae } 902b35892eSInki Dae 910519f9a1SInki Dae static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, 922b35892eSInki Dae struct vm_area_struct *vma, 932b35892eSInki Dae unsigned long f_vaddr, 942b35892eSInki Dae pgoff_t page_offset) 952b35892eSInki Dae { 962b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 972b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 982b35892eSInki Dae unsigned long pfn; 992b35892eSInki Dae 1002b35892eSInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 1012b35892eSInki Dae if (!buf->pages) 1022b35892eSInki Dae return -EINTR; 1032b35892eSInki Dae 1042b35892eSInki Dae pfn = page_to_pfn(buf->pages[page_offset++]); 105f6ead8deSInki Dae } else 1062b35892eSInki Dae pfn = (buf->dma_addr >> PAGE_SHIFT) + page_offset; 1072b35892eSInki Dae 1082b35892eSInki Dae return vm_insert_mixed(vma, f_vaddr, pfn); 1092b35892eSInki Dae } 1102b35892eSInki Dae 1112364839aSJoonyoung Shim static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, 1122364839aSJoonyoung Shim struct drm_file *file_priv, 1132364839aSJoonyoung Shim unsigned int *handle) 1141c248b7dSInki Dae { 1151c248b7dSInki Dae int ret; 1161c248b7dSInki Dae 1171c248b7dSInki Dae /* 1181c248b7dSInki Dae * allocate a id of idr table where the obj is registered 1191c248b7dSInki Dae * and handle has the id what user can see. 1201c248b7dSInki Dae */ 1211c248b7dSInki Dae ret = drm_gem_handle_create(file_priv, obj, handle); 1221c248b7dSInki Dae if (ret) 1232364839aSJoonyoung Shim return ret; 1241c248b7dSInki Dae 1251c248b7dSInki Dae DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); 1261c248b7dSInki Dae 1271c248b7dSInki Dae /* drop reference from allocate - handle holds it now. */ 1281c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 1291c248b7dSInki Dae 1302364839aSJoonyoung Shim return 0; 1312364839aSJoonyoung Shim } 1321c248b7dSInki Dae 1332364839aSJoonyoung Shim void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) 1342364839aSJoonyoung Shim { 1352364839aSJoonyoung Shim struct drm_gem_object *obj; 136c01d73faSInki Dae struct exynos_drm_gem_buf *buf; 1372364839aSJoonyoung Shim 1382364839aSJoonyoung Shim DRM_DEBUG_KMS("%s\n", __FILE__); 1392364839aSJoonyoung Shim 1402364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 141c01d73faSInki Dae buf = exynos_gem_obj->buffer; 1422364839aSJoonyoung Shim 1432364839aSJoonyoung Shim DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); 1442364839aSJoonyoung Shim 145c374e731SInki Dae /* 146c374e731SInki Dae * do not release memory region from exporter. 147c374e731SInki Dae * 148c374e731SInki Dae * the region will be released by exporter 149c374e731SInki Dae * once dmabuf's refcount becomes 0. 150c374e731SInki Dae */ 151c374e731SInki Dae if (obj->import_attach) 152c374e731SInki Dae goto out; 153c374e731SInki Dae 154c01d73faSInki Dae exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); 1552b35892eSInki Dae 156c374e731SInki Dae out: 157c01d73faSInki Dae exynos_drm_fini_buf(obj->dev, buf); 1582b35892eSInki Dae exynos_gem_obj->buffer = NULL; 1592364839aSJoonyoung Shim 1602364839aSJoonyoung Shim if (obj->map_list.map) 1612364839aSJoonyoung Shim drm_gem_free_mmap_offset(obj); 1622364839aSJoonyoung Shim 1632364839aSJoonyoung Shim /* release file pointer to gem object. */ 1641c248b7dSInki Dae drm_gem_object_release(obj); 1651c248b7dSInki Dae 1661c248b7dSInki Dae kfree(exynos_gem_obj); 1672b35892eSInki Dae exynos_gem_obj = NULL; 1682364839aSJoonyoung Shim } 1692364839aSJoonyoung Shim 170b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, 1712364839aSJoonyoung Shim unsigned long size) 1722364839aSJoonyoung Shim { 1732364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 1742364839aSJoonyoung Shim struct drm_gem_object *obj; 1752364839aSJoonyoung Shim int ret; 1762364839aSJoonyoung Shim 1772364839aSJoonyoung Shim exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); 1782364839aSJoonyoung Shim if (!exynos_gem_obj) { 1792364839aSJoonyoung Shim DRM_ERROR("failed to allocate exynos gem object\n"); 1802364839aSJoonyoung Shim return NULL; 1812364839aSJoonyoung Shim } 1822364839aSJoonyoung Shim 1832b35892eSInki Dae exynos_gem_obj->size = size; 1842364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 1852364839aSJoonyoung Shim 1862364839aSJoonyoung Shim ret = drm_gem_object_init(dev, obj, size); 1872364839aSJoonyoung Shim if (ret < 0) { 1882364839aSJoonyoung Shim DRM_ERROR("failed to initialize gem object\n"); 1892364839aSJoonyoung Shim kfree(exynos_gem_obj); 1902364839aSJoonyoung Shim return NULL; 1912364839aSJoonyoung Shim } 1922364839aSJoonyoung Shim 1932364839aSJoonyoung Shim DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); 1942364839aSJoonyoung Shim 1952364839aSJoonyoung Shim return exynos_gem_obj; 1961c248b7dSInki Dae } 1971c248b7dSInki Dae 198f088d5a9SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 1992b35892eSInki Dae unsigned int flags, 200ee5e770eSJoonyoung Shim unsigned long size) 201f088d5a9SInki Dae { 2022364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 2032b35892eSInki Dae struct exynos_drm_gem_buf *buf; 2042b35892eSInki Dae int ret; 205f088d5a9SInki Dae 206dcf9af82SInki Dae if (!size) { 207dcf9af82SInki Dae DRM_ERROR("invalid size.\n"); 208dcf9af82SInki Dae return ERR_PTR(-EINVAL); 209dcf9af82SInki Dae } 210f088d5a9SInki Dae 211dcf9af82SInki Dae size = roundup_gem_size(size, flags); 212dcf9af82SInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 213dcf9af82SInki Dae 214dcf9af82SInki Dae ret = check_gem_flags(flags); 215dcf9af82SInki Dae if (ret) 216dcf9af82SInki Dae return ERR_PTR(ret); 2172b35892eSInki Dae 2182b35892eSInki Dae buf = exynos_drm_init_buf(dev, size); 2192b35892eSInki Dae if (!buf) 220ee5e770eSJoonyoung Shim return ERR_PTR(-ENOMEM); 221f088d5a9SInki Dae 2222364839aSJoonyoung Shim exynos_gem_obj = exynos_drm_gem_init(dev, size); 2232364839aSJoonyoung Shim if (!exynos_gem_obj) { 2242b35892eSInki Dae ret = -ENOMEM; 225dcf9af82SInki Dae goto err_fini_buf; 226f088d5a9SInki Dae } 227f088d5a9SInki Dae 2282b35892eSInki Dae exynos_gem_obj->buffer = buf; 2292b35892eSInki Dae 2302b35892eSInki Dae /* set memory type and cache attribute from user side. */ 2312b35892eSInki Dae exynos_gem_obj->flags = flags; 2322b35892eSInki Dae 2332b35892eSInki Dae ret = exynos_drm_alloc_buf(dev, buf, flags); 2342b35892eSInki Dae if (ret < 0) { 2352b35892eSInki Dae drm_gem_object_release(&exynos_gem_obj->base); 236dcf9af82SInki Dae goto err_fini_buf; 2372b35892eSInki Dae } 238f088d5a9SInki Dae 239f088d5a9SInki Dae return exynos_gem_obj; 240dcf9af82SInki Dae 241dcf9af82SInki Dae err_fini_buf: 2422b35892eSInki Dae exynos_drm_fini_buf(dev, buf); 2432b35892eSInki Dae return ERR_PTR(ret); 244f088d5a9SInki Dae } 245f088d5a9SInki Dae 2461c248b7dSInki Dae int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 2471c248b7dSInki Dae struct drm_file *file_priv) 2481c248b7dSInki Dae { 2491c248b7dSInki Dae struct drm_exynos_gem_create *args = data; 250ee5e770eSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 2512364839aSJoonyoung Shim int ret; 2521c248b7dSInki Dae 253f088d5a9SInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 2541c248b7dSInki Dae 2552b35892eSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); 2561c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 2571c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 2581c248b7dSInki Dae 2592364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 2602364839aSJoonyoung Shim &args->handle); 2612364839aSJoonyoung Shim if (ret) { 2622364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 2632364839aSJoonyoung Shim return ret; 2642364839aSJoonyoung Shim } 2652364839aSJoonyoung Shim 2661c248b7dSInki Dae return 0; 2671c248b7dSInki Dae } 2681c248b7dSInki Dae 269f0b1bda7SInki Dae void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, 270f0b1bda7SInki Dae unsigned int gem_handle, 271f0b1bda7SInki Dae struct drm_file *file_priv) 272f0b1bda7SInki Dae { 273f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 274f0b1bda7SInki Dae struct drm_gem_object *obj; 275f0b1bda7SInki Dae 276f0b1bda7SInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 277f0b1bda7SInki Dae if (!obj) { 278f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 279f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 280f0b1bda7SInki Dae } 281f0b1bda7SInki Dae 282f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 283f0b1bda7SInki Dae 284f0b1bda7SInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 285f0b1bda7SInki Dae DRM_DEBUG_KMS("not support NONCONTIG type.\n"); 286f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 287f0b1bda7SInki Dae 288f0b1bda7SInki Dae /* TODO */ 289f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 290f0b1bda7SInki Dae } 291f0b1bda7SInki Dae 292f0b1bda7SInki Dae return &exynos_gem_obj->buffer->dma_addr; 293f0b1bda7SInki Dae } 294f0b1bda7SInki Dae 295f0b1bda7SInki Dae void exynos_drm_gem_put_dma_addr(struct drm_device *dev, 296f0b1bda7SInki Dae unsigned int gem_handle, 297f0b1bda7SInki Dae struct drm_file *file_priv) 298f0b1bda7SInki Dae { 299f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 300f0b1bda7SInki Dae struct drm_gem_object *obj; 301f0b1bda7SInki Dae 302f0b1bda7SInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 303f0b1bda7SInki Dae if (!obj) { 304f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 305f0b1bda7SInki Dae return; 306f0b1bda7SInki Dae } 307f0b1bda7SInki Dae 308f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 309f0b1bda7SInki Dae 310f0b1bda7SInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 311f0b1bda7SInki Dae DRM_DEBUG_KMS("not support NONCONTIG type.\n"); 312f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 313f0b1bda7SInki Dae 314f0b1bda7SInki Dae /* TODO */ 315f0b1bda7SInki Dae return; 316f0b1bda7SInki Dae } 317f0b1bda7SInki Dae 318f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 319f0b1bda7SInki Dae 320f0b1bda7SInki Dae /* 321f0b1bda7SInki Dae * decrease obj->refcount one more time because we has already 322f0b1bda7SInki Dae * increased it at exynos_drm_gem_get_dma_addr(). 323f0b1bda7SInki Dae */ 324f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 325f0b1bda7SInki Dae } 326f0b1bda7SInki Dae 3271c248b7dSInki Dae int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, 3281c248b7dSInki Dae struct drm_file *file_priv) 3291c248b7dSInki Dae { 3301c248b7dSInki Dae struct drm_exynos_gem_map_off *args = data; 3311c248b7dSInki Dae 3321c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 3331c248b7dSInki Dae 3341c248b7dSInki Dae DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", 3351c248b7dSInki Dae args->handle, (unsigned long)args->offset); 3361c248b7dSInki Dae 3371c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 3381c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 3391c248b7dSInki Dae return -ENODEV; 3401c248b7dSInki Dae } 3411c248b7dSInki Dae 3421c248b7dSInki Dae return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, 3431c248b7dSInki Dae &args->offset); 3441c248b7dSInki Dae } 3451c248b7dSInki Dae 3461c248b7dSInki Dae static int exynos_drm_gem_mmap_buffer(struct file *filp, 3471c248b7dSInki Dae struct vm_area_struct *vma) 3481c248b7dSInki Dae { 3491c248b7dSInki Dae struct drm_gem_object *obj = filp->private_data; 3501c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 3512c871127SInki Dae struct exynos_drm_gem_buf *buffer; 3520519f9a1SInki Dae unsigned long vm_size; 3531c248b7dSInki Dae 3541c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 3551c248b7dSInki Dae 356314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; 3571c248b7dSInki Dae 358c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 3591c248b7dSInki Dae 3600519f9a1SInki Dae vm_size = vma->vm_end - vma->vm_start; 3612b35892eSInki Dae 3621c248b7dSInki Dae /* 3632c871127SInki Dae * a buffer contains information to physically continuous memory 3641c248b7dSInki Dae * allocated by user request or at framebuffer creation. 3651c248b7dSInki Dae */ 3662c871127SInki Dae buffer = exynos_gem_obj->buffer; 3671c248b7dSInki Dae 3681c248b7dSInki Dae /* check if user-requested size is valid. */ 3692c871127SInki Dae if (vm_size > buffer->size) 3701c248b7dSInki Dae return -EINVAL; 3711c248b7dSInki Dae 3720519f9a1SInki Dae return dma_mmap_attrs(obj->dev->dev, vma, buffer->kvaddr, 3730519f9a1SInki Dae buffer->dma_addr, buffer->size, 3740519f9a1SInki Dae &buffer->dma_attrs); 3751c248b7dSInki Dae } 3761c248b7dSInki Dae 3771c248b7dSInki Dae static const struct file_operations exynos_drm_gem_fops = { 3781c248b7dSInki Dae .mmap = exynos_drm_gem_mmap_buffer, 3791c248b7dSInki Dae }; 3801c248b7dSInki Dae 3811c248b7dSInki Dae int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 3821c248b7dSInki Dae struct drm_file *file_priv) 3831c248b7dSInki Dae { 3841c248b7dSInki Dae struct drm_exynos_gem_mmap *args = data; 3851c248b7dSInki Dae struct drm_gem_object *obj; 3861c248b7dSInki Dae unsigned int addr; 3871c248b7dSInki Dae 3881c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 3891c248b7dSInki Dae 3901c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 3911c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 3921c248b7dSInki Dae return -ENODEV; 3931c248b7dSInki Dae } 3941c248b7dSInki Dae 3951c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 3961c248b7dSInki Dae if (!obj) { 3971c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 3981c248b7dSInki Dae return -EINVAL; 3991c248b7dSInki Dae } 4001c248b7dSInki Dae 4011c248b7dSInki Dae obj->filp->f_op = &exynos_drm_gem_fops; 4021c248b7dSInki Dae obj->filp->private_data = obj; 4031c248b7dSInki Dae 4046be5ceb0SLinus Torvalds addr = vm_mmap(obj->filp, 0, args->size, 4051c248b7dSInki Dae PROT_READ | PROT_WRITE, MAP_SHARED, 0); 4061c248b7dSInki Dae 4071c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 4081c248b7dSInki Dae 4091c248b7dSInki Dae if (IS_ERR((void *)addr)) 4101c248b7dSInki Dae return PTR_ERR((void *)addr); 4111c248b7dSInki Dae 4121c248b7dSInki Dae args->mapped = addr; 4131c248b7dSInki Dae 4141c248b7dSInki Dae DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); 4151c248b7dSInki Dae 4161c248b7dSInki Dae return 0; 4171c248b7dSInki Dae } 4181c248b7dSInki Dae 41940cd7e0cSInki Dae int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 42040cd7e0cSInki Dae struct drm_file *file_priv) 42140cd7e0cSInki Dae { struct exynos_drm_gem_obj *exynos_gem_obj; 42240cd7e0cSInki Dae struct drm_exynos_gem_info *args = data; 42340cd7e0cSInki Dae struct drm_gem_object *obj; 42440cd7e0cSInki Dae 42540cd7e0cSInki Dae mutex_lock(&dev->struct_mutex); 42640cd7e0cSInki Dae 42740cd7e0cSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 42840cd7e0cSInki Dae if (!obj) { 42940cd7e0cSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 43040cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 43140cd7e0cSInki Dae return -EINVAL; 43240cd7e0cSInki Dae } 43340cd7e0cSInki Dae 43440cd7e0cSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 43540cd7e0cSInki Dae 43640cd7e0cSInki Dae args->flags = exynos_gem_obj->flags; 43740cd7e0cSInki Dae args->size = exynos_gem_obj->size; 43840cd7e0cSInki Dae 43940cd7e0cSInki Dae drm_gem_object_unreference(obj); 44040cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 44140cd7e0cSInki Dae 44240cd7e0cSInki Dae return 0; 44340cd7e0cSInki Dae } 44440cd7e0cSInki Dae 4451c248b7dSInki Dae int exynos_drm_gem_init_object(struct drm_gem_object *obj) 4461c248b7dSInki Dae { 4471c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 4481c248b7dSInki Dae 4491c248b7dSInki Dae return 0; 4501c248b7dSInki Dae } 4511c248b7dSInki Dae 452ee5e770eSJoonyoung Shim void exynos_drm_gem_free_object(struct drm_gem_object *obj) 4531c248b7dSInki Dae { 454b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 455b2df26c1SInki Dae struct exynos_drm_gem_buf *buf; 456b2df26c1SInki Dae 4571c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 4581c248b7dSInki Dae 459b2df26c1SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 460b2df26c1SInki Dae buf = exynos_gem_obj->buffer; 461b2df26c1SInki Dae 462b2df26c1SInki Dae if (obj->import_attach) 463b2df26c1SInki Dae drm_prime_gem_destroy(obj, buf->sgt); 464b2df26c1SInki Dae 4652364839aSJoonyoung Shim exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); 4661c248b7dSInki Dae } 4671c248b7dSInki Dae 4681c248b7dSInki Dae int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 469ee5e770eSJoonyoung Shim struct drm_device *dev, 470ee5e770eSJoonyoung Shim struct drm_mode_create_dumb *args) 4711c248b7dSInki Dae { 4721c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 4732364839aSJoonyoung Shim int ret; 4741c248b7dSInki Dae 4751c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 4761c248b7dSInki Dae 4771c248b7dSInki Dae /* 4781c248b7dSInki Dae * alocate memory to be used for framebuffer. 4791c248b7dSInki Dae * - this callback would be called by user application 4801c248b7dSInki Dae * with DRM_IOCTL_MODE_CREATE_DUMB command. 4811c248b7dSInki Dae */ 4821c248b7dSInki Dae 4833fd6b694SCooper Yuan args->pitch = args->width * ((args->bpp + 7) / 8); 4847da5907cSInki Dae args->size = args->pitch * args->height; 4851c248b7dSInki Dae 4862b35892eSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); 4871c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 4881c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 4891c248b7dSInki Dae 4902364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 4912364839aSJoonyoung Shim &args->handle); 4922364839aSJoonyoung Shim if (ret) { 4932364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 4942364839aSJoonyoung Shim return ret; 4952364839aSJoonyoung Shim } 4962364839aSJoonyoung Shim 4971c248b7dSInki Dae return 0; 4981c248b7dSInki Dae } 4991c248b7dSInki Dae 5001c248b7dSInki Dae int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 501ee5e770eSJoonyoung Shim struct drm_device *dev, uint32_t handle, 502ee5e770eSJoonyoung Shim uint64_t *offset) 5031c248b7dSInki Dae { 5041c248b7dSInki Dae struct drm_gem_object *obj; 5052d91cf17SJoonyoung Shim int ret = 0; 5061c248b7dSInki Dae 5071c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 5081c248b7dSInki Dae 5091c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 5101c248b7dSInki Dae 5111c248b7dSInki Dae /* 5121c248b7dSInki Dae * get offset of memory allocated for drm framebuffer. 5131c248b7dSInki Dae * - this callback would be called by user application 5141c248b7dSInki Dae * with DRM_IOCTL_MODE_MAP_DUMB command. 5151c248b7dSInki Dae */ 5161c248b7dSInki Dae 5171c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, handle); 5181c248b7dSInki Dae if (!obj) { 5191c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 5202d91cf17SJoonyoung Shim ret = -EINVAL; 5212d91cf17SJoonyoung Shim goto unlock; 5221c248b7dSInki Dae } 5231c248b7dSInki Dae 5246037bafaSLaurent Pinchart if (!obj->map_list.map) { 5256037bafaSLaurent Pinchart ret = drm_gem_create_mmap_offset(obj); 5262d91cf17SJoonyoung Shim if (ret) 5272d91cf17SJoonyoung Shim goto out; 5282d91cf17SJoonyoung Shim } 5291c248b7dSInki Dae 5306037bafaSLaurent Pinchart *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; 5311c248b7dSInki Dae DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); 5321c248b7dSInki Dae 5332d91cf17SJoonyoung Shim out: 5342d91cf17SJoonyoung Shim drm_gem_object_unreference(obj); 5352d91cf17SJoonyoung Shim unlock: 5361c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 5372d91cf17SJoonyoung Shim return ret; 5381c248b7dSInki Dae } 5391c248b7dSInki Dae 540ee5e770eSJoonyoung Shim int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, 541ee5e770eSJoonyoung Shim struct drm_device *dev, 542ee5e770eSJoonyoung Shim unsigned int handle) 543ee5e770eSJoonyoung Shim { 544ee5e770eSJoonyoung Shim int ret; 545ee5e770eSJoonyoung Shim 546ee5e770eSJoonyoung Shim DRM_DEBUG_KMS("%s\n", __FILE__); 547ee5e770eSJoonyoung Shim 548ee5e770eSJoonyoung Shim /* 549ee5e770eSJoonyoung Shim * obj->refcount and obj->handle_count are decreased and 550ee5e770eSJoonyoung Shim * if both them are 0 then exynos_drm_gem_free_object() 551ee5e770eSJoonyoung Shim * would be called by callback to release resources. 552ee5e770eSJoonyoung Shim */ 553ee5e770eSJoonyoung Shim ret = drm_gem_handle_delete(file_priv, handle); 554ee5e770eSJoonyoung Shim if (ret < 0) { 555ee5e770eSJoonyoung Shim DRM_ERROR("failed to delete drm_gem_handle.\n"); 556ee5e770eSJoonyoung Shim return ret; 557ee5e770eSJoonyoung Shim } 558ee5e770eSJoonyoung Shim 559ee5e770eSJoonyoung Shim return 0; 560ee5e770eSJoonyoung Shim } 561ee5e770eSJoonyoung Shim 5621c248b7dSInki Dae int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 5631c248b7dSInki Dae { 5641c248b7dSInki Dae struct drm_gem_object *obj = vma->vm_private_data; 5651c248b7dSInki Dae struct drm_device *dev = obj->dev; 5662b35892eSInki Dae unsigned long f_vaddr; 5671c248b7dSInki Dae pgoff_t page_offset; 5681c248b7dSInki Dae int ret; 5691c248b7dSInki Dae 5701c248b7dSInki Dae page_offset = ((unsigned long)vmf->virtual_address - 5711c248b7dSInki Dae vma->vm_start) >> PAGE_SHIFT; 5722b35892eSInki Dae f_vaddr = (unsigned long)vmf->virtual_address; 5731c248b7dSInki Dae 5741c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 5751c248b7dSInki Dae 5760519f9a1SInki Dae ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); 5772b35892eSInki Dae if (ret < 0) 5780519f9a1SInki Dae DRM_ERROR("failed to map a buffer with user.\n"); 5791c248b7dSInki Dae 5801c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 5811c248b7dSInki Dae 5821c248b7dSInki Dae return convert_to_vm_err_msg(ret); 5831c248b7dSInki Dae } 5841c248b7dSInki Dae 5851c248b7dSInki Dae int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 5861c248b7dSInki Dae { 587c01d73faSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 588c01d73faSInki Dae struct drm_gem_object *obj; 5891c248b7dSInki Dae int ret; 5901c248b7dSInki Dae 5911c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 5921c248b7dSInki Dae 5931c248b7dSInki Dae /* set vm_area_struct. */ 5941c248b7dSInki Dae ret = drm_gem_mmap(filp, vma); 5951c248b7dSInki Dae if (ret < 0) { 5961c248b7dSInki Dae DRM_ERROR("failed to mmap.\n"); 5971c248b7dSInki Dae return ret; 5981c248b7dSInki Dae } 5991c248b7dSInki Dae 600c01d73faSInki Dae obj = vma->vm_private_data; 601c01d73faSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 602c01d73faSInki Dae 603c01d73faSInki Dae ret = check_gem_flags(exynos_gem_obj->flags); 604c01d73faSInki Dae if (ret) { 605c01d73faSInki Dae drm_gem_vm_close(vma); 606c01d73faSInki Dae drm_gem_free_mmap_offset(obj); 607c01d73faSInki Dae return ret; 608c01d73faSInki Dae } 609c01d73faSInki Dae 6101c248b7dSInki Dae vma->vm_flags &= ~VM_PFNMAP; 6111c248b7dSInki Dae vma->vm_flags |= VM_MIXEDMAP; 6121c248b7dSInki Dae 613c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 614c01d73faSInki Dae 6151c248b7dSInki Dae return ret; 6161c248b7dSInki Dae } 617