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 261c248b7dSInki Dae #include "drmP.h" 271c248b7dSInki Dae #include "drm.h" 281c248b7dSInki Dae 292b35892eSInki Dae #include <linux/shmem_fs.h> 301c248b7dSInki Dae #include <drm/exynos_drm.h> 311c248b7dSInki Dae 321c248b7dSInki Dae #include "exynos_drm_drv.h" 331c248b7dSInki Dae #include "exynos_drm_gem.h" 341c248b7dSInki Dae #include "exynos_drm_buf.h" 351c248b7dSInki Dae 361c248b7dSInki Dae static unsigned int convert_to_vm_err_msg(int msg) 371c248b7dSInki Dae { 381c248b7dSInki Dae unsigned int out_msg; 391c248b7dSInki Dae 401c248b7dSInki Dae switch (msg) { 411c248b7dSInki Dae case 0: 421c248b7dSInki Dae case -ERESTARTSYS: 431c248b7dSInki Dae case -EINTR: 441c248b7dSInki Dae out_msg = VM_FAULT_NOPAGE; 451c248b7dSInki Dae break; 461c248b7dSInki Dae 471c248b7dSInki Dae case -ENOMEM: 481c248b7dSInki Dae out_msg = VM_FAULT_OOM; 491c248b7dSInki Dae break; 501c248b7dSInki Dae 511c248b7dSInki Dae default: 521c248b7dSInki Dae out_msg = VM_FAULT_SIGBUS; 531c248b7dSInki Dae break; 541c248b7dSInki Dae } 551c248b7dSInki Dae 561c248b7dSInki Dae return out_msg; 571c248b7dSInki Dae } 581c248b7dSInki Dae 59dcf9af82SInki Dae static int check_gem_flags(unsigned int flags) 602b35892eSInki Dae { 61dcf9af82SInki Dae if (flags & ~(EXYNOS_BO_MASK)) { 62dcf9af82SInki Dae DRM_ERROR("invalid flags.\n"); 63dcf9af82SInki Dae return -EINVAL; 64dcf9af82SInki Dae } 65dcf9af82SInki Dae 66dcf9af82SInki Dae return 0; 67dcf9af82SInki Dae } 68dcf9af82SInki Dae 69c01d73faSInki Dae static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, 70c01d73faSInki Dae struct vm_area_struct *vma) 71c01d73faSInki Dae { 72c01d73faSInki Dae DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); 73c01d73faSInki Dae 74c01d73faSInki Dae /* non-cachable as default. */ 75c01d73faSInki Dae if (obj->flags & EXYNOS_BO_CACHABLE) 76c01d73faSInki Dae vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 77c01d73faSInki Dae else if (obj->flags & EXYNOS_BO_WC) 78c01d73faSInki Dae vma->vm_page_prot = 79c01d73faSInki Dae pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 80c01d73faSInki Dae else 81c01d73faSInki Dae vma->vm_page_prot = 82c01d73faSInki Dae pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 83c01d73faSInki Dae } 84c01d73faSInki Dae 85dcf9af82SInki Dae static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) 86dcf9af82SInki Dae { 87dcf9af82SInki Dae if (!IS_NONCONTIG_BUFFER(flags)) { 88dcf9af82SInki Dae if (size >= SZ_1M) 89dcf9af82SInki Dae return roundup(size, SECTION_SIZE); 90dcf9af82SInki Dae else if (size >= SZ_64K) 91dcf9af82SInki Dae return roundup(size, SZ_64K); 92dcf9af82SInki Dae else 93dcf9af82SInki Dae goto out; 94dcf9af82SInki Dae } 95dcf9af82SInki Dae out: 96dcf9af82SInki Dae return roundup(size, PAGE_SIZE); 972b35892eSInki Dae } 982b35892eSInki Dae 99b2df26c1SInki Dae struct page **exynos_gem_get_pages(struct drm_gem_object *obj, 1002b35892eSInki Dae gfp_t gfpmask) 1012b35892eSInki Dae { 1022b35892eSInki Dae struct inode *inode; 1032b35892eSInki Dae struct address_space *mapping; 1042b35892eSInki Dae struct page *p, **pages; 1052b35892eSInki Dae int i, npages; 1062b35892eSInki Dae 1072b35892eSInki Dae /* This is the shared memory object that backs the GEM resource */ 1082b35892eSInki Dae inode = obj->filp->f_path.dentry->d_inode; 1092b35892eSInki Dae mapping = inode->i_mapping; 1102b35892eSInki Dae 1112b35892eSInki Dae npages = obj->size >> PAGE_SHIFT; 1122b35892eSInki Dae 1132b35892eSInki Dae pages = drm_malloc_ab(npages, sizeof(struct page *)); 1142b35892eSInki Dae if (pages == NULL) 1152b35892eSInki Dae return ERR_PTR(-ENOMEM); 1162b35892eSInki Dae 1172b35892eSInki Dae gfpmask |= mapping_gfp_mask(mapping); 1182b35892eSInki Dae 1192b35892eSInki Dae for (i = 0; i < npages; i++) { 1202b35892eSInki Dae p = shmem_read_mapping_page_gfp(mapping, i, gfpmask); 1212b35892eSInki Dae if (IS_ERR(p)) 1222b35892eSInki Dae goto fail; 1232b35892eSInki Dae pages[i] = p; 1242b35892eSInki Dae } 1252b35892eSInki Dae 1262b35892eSInki Dae return pages; 1272b35892eSInki Dae 1282b35892eSInki Dae fail: 1292b35892eSInki Dae while (i--) 1302b35892eSInki Dae page_cache_release(pages[i]); 1312b35892eSInki Dae 1322b35892eSInki Dae drm_free_large(pages); 1332b35892eSInki Dae return ERR_PTR(PTR_ERR(p)); 1342b35892eSInki Dae } 1352b35892eSInki Dae 1362b35892eSInki Dae static void exynos_gem_put_pages(struct drm_gem_object *obj, 1372b35892eSInki Dae struct page **pages, 1382b35892eSInki Dae bool dirty, bool accessed) 1392b35892eSInki Dae { 1402b35892eSInki Dae int i, npages; 1412b35892eSInki Dae 1422b35892eSInki Dae npages = obj->size >> PAGE_SHIFT; 1432b35892eSInki Dae 1442b35892eSInki Dae for (i = 0; i < npages; i++) { 1452b35892eSInki Dae if (dirty) 1462b35892eSInki Dae set_page_dirty(pages[i]); 1472b35892eSInki Dae 1482b35892eSInki Dae if (accessed) 1492b35892eSInki Dae mark_page_accessed(pages[i]); 1502b35892eSInki Dae 1512b35892eSInki Dae /* Undo the reference we took when populating the table */ 1522b35892eSInki Dae page_cache_release(pages[i]); 1532b35892eSInki Dae } 1542b35892eSInki Dae 1552b35892eSInki Dae drm_free_large(pages); 1562b35892eSInki Dae } 1572b35892eSInki Dae 1582b35892eSInki Dae static int exynos_drm_gem_map_pages(struct drm_gem_object *obj, 1592b35892eSInki Dae struct vm_area_struct *vma, 1602b35892eSInki Dae unsigned long f_vaddr, 1612b35892eSInki Dae pgoff_t page_offset) 1622b35892eSInki Dae { 1632b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 1642b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 1652b35892eSInki Dae unsigned long pfn; 1662b35892eSInki Dae 1672b35892eSInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 1682b35892eSInki Dae if (!buf->pages) 1692b35892eSInki Dae return -EINTR; 1702b35892eSInki Dae 1712b35892eSInki Dae pfn = page_to_pfn(buf->pages[page_offset++]); 172f6ead8deSInki Dae } else 1732b35892eSInki Dae pfn = (buf->dma_addr >> PAGE_SHIFT) + page_offset; 1742b35892eSInki Dae 1752b35892eSInki Dae return vm_insert_mixed(vma, f_vaddr, pfn); 1762b35892eSInki Dae } 1772b35892eSInki Dae 1782b35892eSInki Dae static int exynos_drm_gem_get_pages(struct drm_gem_object *obj) 1792b35892eSInki Dae { 1802b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 1812b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 1822b35892eSInki Dae struct scatterlist *sgl; 1832b35892eSInki Dae struct page **pages; 1842b35892eSInki Dae unsigned int npages, i = 0; 1852b35892eSInki Dae int ret; 1862b35892eSInki Dae 1872b35892eSInki Dae if (buf->pages) { 1882b35892eSInki Dae DRM_DEBUG_KMS("already allocated.\n"); 1892b35892eSInki Dae return -EINVAL; 1902b35892eSInki Dae } 1912b35892eSInki Dae 1922b35892eSInki Dae pages = exynos_gem_get_pages(obj, GFP_KERNEL); 1932b35892eSInki Dae if (IS_ERR(pages)) { 1942b35892eSInki Dae DRM_ERROR("failed to get pages.\n"); 1952b35892eSInki Dae return PTR_ERR(pages); 1962b35892eSInki Dae } 1972b35892eSInki Dae 1982b35892eSInki Dae npages = obj->size >> PAGE_SHIFT; 199b2df26c1SInki Dae buf->page_size = PAGE_SIZE; 2002b35892eSInki Dae 2012b35892eSInki Dae buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); 2022b35892eSInki Dae if (!buf->sgt) { 2032b35892eSInki Dae DRM_ERROR("failed to allocate sg table.\n"); 2042b35892eSInki Dae ret = -ENOMEM; 2052b35892eSInki Dae goto err; 2062b35892eSInki Dae } 2072b35892eSInki Dae 2082b35892eSInki Dae ret = sg_alloc_table(buf->sgt, npages, GFP_KERNEL); 2092b35892eSInki Dae if (ret < 0) { 2102b35892eSInki Dae DRM_ERROR("failed to initialize sg table.\n"); 2112b35892eSInki Dae ret = -EFAULT; 2122b35892eSInki Dae goto err1; 2132b35892eSInki Dae } 2142b35892eSInki Dae 2152b35892eSInki Dae sgl = buf->sgt->sgl; 2162b35892eSInki Dae 2172b35892eSInki Dae /* set all pages to sg list. */ 2182b35892eSInki Dae while (i < npages) { 2192b35892eSInki Dae sg_set_page(sgl, pages[i], PAGE_SIZE, 0); 2202b35892eSInki Dae sg_dma_address(sgl) = page_to_phys(pages[i]); 2212b35892eSInki Dae i++; 2222b35892eSInki Dae sgl = sg_next(sgl); 2232b35892eSInki Dae } 2242b35892eSInki Dae 2252b35892eSInki Dae /* add some codes for UNCACHED type here. TODO */ 2262b35892eSInki Dae 2272b35892eSInki Dae buf->pages = pages; 2282b35892eSInki Dae return ret; 2292b35892eSInki Dae err1: 2302b35892eSInki Dae kfree(buf->sgt); 2312b35892eSInki Dae buf->sgt = NULL; 2322b35892eSInki Dae err: 2332b35892eSInki Dae exynos_gem_put_pages(obj, pages, true, false); 2342b35892eSInki Dae return ret; 2352b35892eSInki Dae 2362b35892eSInki Dae } 2372b35892eSInki Dae 2382b35892eSInki Dae static void exynos_drm_gem_put_pages(struct drm_gem_object *obj) 2392b35892eSInki Dae { 2402b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 2412b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 2422b35892eSInki Dae 2432b35892eSInki Dae /* 2442b35892eSInki Dae * if buffer typs is EXYNOS_BO_NONCONTIG then release all pages 2452b35892eSInki Dae * allocated at gem fault handler. 2462b35892eSInki Dae */ 2472b35892eSInki Dae sg_free_table(buf->sgt); 2482b35892eSInki Dae kfree(buf->sgt); 2492b35892eSInki Dae buf->sgt = NULL; 2502b35892eSInki Dae 2512b35892eSInki Dae exynos_gem_put_pages(obj, buf->pages, true, false); 2522b35892eSInki Dae buf->pages = NULL; 2532b35892eSInki Dae 2542b35892eSInki Dae /* add some codes for UNCACHED type here. TODO */ 2552b35892eSInki Dae } 2562b35892eSInki Dae 2572364839aSJoonyoung Shim static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, 2582364839aSJoonyoung Shim struct drm_file *file_priv, 2592364839aSJoonyoung Shim unsigned int *handle) 2601c248b7dSInki Dae { 2611c248b7dSInki Dae int ret; 2621c248b7dSInki Dae 2631c248b7dSInki Dae /* 2641c248b7dSInki Dae * allocate a id of idr table where the obj is registered 2651c248b7dSInki Dae * and handle has the id what user can see. 2661c248b7dSInki Dae */ 2671c248b7dSInki Dae ret = drm_gem_handle_create(file_priv, obj, handle); 2681c248b7dSInki Dae if (ret) 2692364839aSJoonyoung Shim return ret; 2701c248b7dSInki Dae 2711c248b7dSInki Dae DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); 2721c248b7dSInki Dae 2731c248b7dSInki Dae /* drop reference from allocate - handle holds it now. */ 2741c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 2751c248b7dSInki Dae 2762364839aSJoonyoung Shim return 0; 2772364839aSJoonyoung Shim } 2781c248b7dSInki Dae 2792364839aSJoonyoung Shim void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) 2802364839aSJoonyoung Shim { 2812364839aSJoonyoung Shim struct drm_gem_object *obj; 282c01d73faSInki Dae struct exynos_drm_gem_buf *buf; 2832364839aSJoonyoung Shim 2842364839aSJoonyoung Shim DRM_DEBUG_KMS("%s\n", __FILE__); 2852364839aSJoonyoung Shim 2862364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 287c01d73faSInki Dae buf = exynos_gem_obj->buffer; 2882364839aSJoonyoung Shim 2892364839aSJoonyoung Shim DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); 2902364839aSJoonyoung Shim 291c01d73faSInki Dae if (!buf->pages) 292c01d73faSInki Dae return; 293c01d73faSInki Dae 294c01d73faSInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) 2952b35892eSInki Dae exynos_drm_gem_put_pages(obj); 2962b35892eSInki Dae else 297c01d73faSInki Dae exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); 2982b35892eSInki Dae 299c01d73faSInki Dae exynos_drm_fini_buf(obj->dev, buf); 3002b35892eSInki Dae exynos_gem_obj->buffer = NULL; 3012364839aSJoonyoung Shim 3022364839aSJoonyoung Shim if (obj->map_list.map) 3032364839aSJoonyoung Shim drm_gem_free_mmap_offset(obj); 3042364839aSJoonyoung Shim 3052364839aSJoonyoung Shim /* release file pointer to gem object. */ 3061c248b7dSInki Dae drm_gem_object_release(obj); 3071c248b7dSInki Dae 3081c248b7dSInki Dae kfree(exynos_gem_obj); 3092b35892eSInki Dae exynos_gem_obj = NULL; 3102364839aSJoonyoung Shim } 3112364839aSJoonyoung Shim 312b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, 3132364839aSJoonyoung Shim unsigned long size) 3142364839aSJoonyoung Shim { 3152364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 3162364839aSJoonyoung Shim struct drm_gem_object *obj; 3172364839aSJoonyoung Shim int ret; 3182364839aSJoonyoung Shim 3192364839aSJoonyoung Shim exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); 3202364839aSJoonyoung Shim if (!exynos_gem_obj) { 3212364839aSJoonyoung Shim DRM_ERROR("failed to allocate exynos gem object\n"); 3222364839aSJoonyoung Shim return NULL; 3232364839aSJoonyoung Shim } 3242364839aSJoonyoung Shim 3252b35892eSInki Dae exynos_gem_obj->size = size; 3262364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 3272364839aSJoonyoung Shim 3282364839aSJoonyoung Shim ret = drm_gem_object_init(dev, obj, size); 3292364839aSJoonyoung Shim if (ret < 0) { 3302364839aSJoonyoung Shim DRM_ERROR("failed to initialize gem object\n"); 3312364839aSJoonyoung Shim kfree(exynos_gem_obj); 3322364839aSJoonyoung Shim return NULL; 3332364839aSJoonyoung Shim } 3342364839aSJoonyoung Shim 3352364839aSJoonyoung Shim DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); 3362364839aSJoonyoung Shim 3372364839aSJoonyoung Shim return exynos_gem_obj; 3381c248b7dSInki Dae } 3391c248b7dSInki Dae 340f088d5a9SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 3412b35892eSInki Dae unsigned int flags, 342ee5e770eSJoonyoung Shim unsigned long size) 343f088d5a9SInki Dae { 3442364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 3452b35892eSInki Dae struct exynos_drm_gem_buf *buf; 3462b35892eSInki Dae int ret; 347f088d5a9SInki Dae 348dcf9af82SInki Dae if (!size) { 349dcf9af82SInki Dae DRM_ERROR("invalid size.\n"); 350dcf9af82SInki Dae return ERR_PTR(-EINVAL); 351dcf9af82SInki Dae } 352f088d5a9SInki Dae 353dcf9af82SInki Dae size = roundup_gem_size(size, flags); 354dcf9af82SInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 355dcf9af82SInki Dae 356dcf9af82SInki Dae ret = check_gem_flags(flags); 357dcf9af82SInki Dae if (ret) 358dcf9af82SInki Dae return ERR_PTR(ret); 3592b35892eSInki Dae 3602b35892eSInki Dae buf = exynos_drm_init_buf(dev, size); 3612b35892eSInki Dae if (!buf) 362ee5e770eSJoonyoung Shim return ERR_PTR(-ENOMEM); 363f088d5a9SInki Dae 3642364839aSJoonyoung Shim exynos_gem_obj = exynos_drm_gem_init(dev, size); 3652364839aSJoonyoung Shim if (!exynos_gem_obj) { 3662b35892eSInki Dae ret = -ENOMEM; 367dcf9af82SInki Dae goto err_fini_buf; 368f088d5a9SInki Dae } 369f088d5a9SInki Dae 3702b35892eSInki Dae exynos_gem_obj->buffer = buf; 3712b35892eSInki Dae 3722b35892eSInki Dae /* set memory type and cache attribute from user side. */ 3732b35892eSInki Dae exynos_gem_obj->flags = flags; 3742b35892eSInki Dae 3752b35892eSInki Dae /* 3762b35892eSInki Dae * allocate all pages as desired size if user wants to allocate 3772b35892eSInki Dae * physically non-continuous memory. 3782b35892eSInki Dae */ 3792b35892eSInki Dae if (flags & EXYNOS_BO_NONCONTIG) { 3802b35892eSInki Dae ret = exynos_drm_gem_get_pages(&exynos_gem_obj->base); 3812b35892eSInki Dae if (ret < 0) { 3822b35892eSInki Dae drm_gem_object_release(&exynos_gem_obj->base); 383dcf9af82SInki Dae goto err_fini_buf; 3842b35892eSInki Dae } 3852b35892eSInki Dae } else { 3862b35892eSInki Dae ret = exynos_drm_alloc_buf(dev, buf, flags); 3872b35892eSInki Dae if (ret < 0) { 3882b35892eSInki Dae drm_gem_object_release(&exynos_gem_obj->base); 389dcf9af82SInki Dae goto err_fini_buf; 3902b35892eSInki Dae } 3912b35892eSInki Dae } 392f088d5a9SInki Dae 393f088d5a9SInki Dae return exynos_gem_obj; 394dcf9af82SInki Dae 395dcf9af82SInki Dae err_fini_buf: 3962b35892eSInki Dae exynos_drm_fini_buf(dev, buf); 3972b35892eSInki Dae return ERR_PTR(ret); 398f088d5a9SInki Dae } 399f088d5a9SInki Dae 4001c248b7dSInki Dae int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 4011c248b7dSInki Dae struct drm_file *file_priv) 4021c248b7dSInki Dae { 4031c248b7dSInki Dae struct drm_exynos_gem_create *args = data; 404ee5e770eSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 4052364839aSJoonyoung Shim int ret; 4061c248b7dSInki Dae 407f088d5a9SInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 4081c248b7dSInki Dae 4092b35892eSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); 4101c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 4111c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 4121c248b7dSInki Dae 4132364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 4142364839aSJoonyoung Shim &args->handle); 4152364839aSJoonyoung Shim if (ret) { 4162364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 4172364839aSJoonyoung Shim return ret; 4182364839aSJoonyoung Shim } 4192364839aSJoonyoung Shim 4201c248b7dSInki Dae return 0; 4211c248b7dSInki Dae } 4221c248b7dSInki Dae 423f0b1bda7SInki Dae void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, 424f0b1bda7SInki Dae unsigned int gem_handle, 425f0b1bda7SInki Dae struct drm_file *file_priv) 426f0b1bda7SInki Dae { 427f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 428f0b1bda7SInki Dae struct drm_gem_object *obj; 429f0b1bda7SInki Dae 430f0b1bda7SInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 431f0b1bda7SInki Dae if (!obj) { 432f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 433f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 434f0b1bda7SInki Dae } 435f0b1bda7SInki Dae 436f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 437f0b1bda7SInki Dae 438f0b1bda7SInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 439f0b1bda7SInki Dae DRM_DEBUG_KMS("not support NONCONTIG type.\n"); 440f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 441f0b1bda7SInki Dae 442f0b1bda7SInki Dae /* TODO */ 443f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 444f0b1bda7SInki Dae } 445f0b1bda7SInki Dae 446f0b1bda7SInki Dae return &exynos_gem_obj->buffer->dma_addr; 447f0b1bda7SInki Dae } 448f0b1bda7SInki Dae 449f0b1bda7SInki Dae void exynos_drm_gem_put_dma_addr(struct drm_device *dev, 450f0b1bda7SInki Dae unsigned int gem_handle, 451f0b1bda7SInki Dae struct drm_file *file_priv) 452f0b1bda7SInki Dae { 453f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 454f0b1bda7SInki Dae struct drm_gem_object *obj; 455f0b1bda7SInki Dae 456f0b1bda7SInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 457f0b1bda7SInki Dae if (!obj) { 458f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 459f0b1bda7SInki Dae return; 460f0b1bda7SInki Dae } 461f0b1bda7SInki Dae 462f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 463f0b1bda7SInki Dae 464f0b1bda7SInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 465f0b1bda7SInki Dae DRM_DEBUG_KMS("not support NONCONTIG type.\n"); 466f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 467f0b1bda7SInki Dae 468f0b1bda7SInki Dae /* TODO */ 469f0b1bda7SInki Dae return; 470f0b1bda7SInki Dae } 471f0b1bda7SInki Dae 472f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 473f0b1bda7SInki Dae 474f0b1bda7SInki Dae /* 475f0b1bda7SInki Dae * decrease obj->refcount one more time because we has already 476f0b1bda7SInki Dae * increased it at exynos_drm_gem_get_dma_addr(). 477f0b1bda7SInki Dae */ 478f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 479f0b1bda7SInki Dae } 480f0b1bda7SInki Dae 4811c248b7dSInki Dae int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, 4821c248b7dSInki Dae struct drm_file *file_priv) 4831c248b7dSInki Dae { 4841c248b7dSInki Dae struct drm_exynos_gem_map_off *args = data; 4851c248b7dSInki Dae 4861c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 4871c248b7dSInki Dae 4881c248b7dSInki Dae DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", 4891c248b7dSInki Dae args->handle, (unsigned long)args->offset); 4901c248b7dSInki Dae 4911c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 4921c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 4931c248b7dSInki Dae return -ENODEV; 4941c248b7dSInki Dae } 4951c248b7dSInki Dae 4961c248b7dSInki Dae return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, 4971c248b7dSInki Dae &args->offset); 4981c248b7dSInki Dae } 4991c248b7dSInki Dae 5001c248b7dSInki Dae static int exynos_drm_gem_mmap_buffer(struct file *filp, 5011c248b7dSInki Dae struct vm_area_struct *vma) 5021c248b7dSInki Dae { 5031c248b7dSInki Dae struct drm_gem_object *obj = filp->private_data; 5041c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 5052c871127SInki Dae struct exynos_drm_gem_buf *buffer; 5062b35892eSInki Dae unsigned long pfn, vm_size, usize, uaddr = vma->vm_start; 5072b35892eSInki Dae int ret; 5081c248b7dSInki Dae 5091c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 5101c248b7dSInki Dae 5111c248b7dSInki Dae vma->vm_flags |= (VM_IO | VM_RESERVED); 5121c248b7dSInki Dae 513c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 5141c248b7dSInki Dae 5152b35892eSInki Dae vm_size = usize = vma->vm_end - vma->vm_start; 5162b35892eSInki Dae 5171c248b7dSInki Dae /* 5182c871127SInki Dae * a buffer contains information to physically continuous memory 5191c248b7dSInki Dae * allocated by user request or at framebuffer creation. 5201c248b7dSInki Dae */ 5212c871127SInki Dae buffer = exynos_gem_obj->buffer; 5221c248b7dSInki Dae 5231c248b7dSInki Dae /* check if user-requested size is valid. */ 5242c871127SInki Dae if (vm_size > buffer->size) 5251c248b7dSInki Dae return -EINVAL; 5261c248b7dSInki Dae 5272b35892eSInki Dae if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { 5282b35892eSInki Dae int i = 0; 5292b35892eSInki Dae 5302b35892eSInki Dae if (!buffer->pages) 5312b35892eSInki Dae return -EINVAL; 5322b35892eSInki Dae 533818c4ea7SInki Dae vma->vm_flags |= VM_MIXEDMAP; 534818c4ea7SInki Dae 5352b35892eSInki Dae do { 5362b35892eSInki Dae ret = vm_insert_page(vma, uaddr, buffer->pages[i++]); 5372b35892eSInki Dae if (ret) { 5382b35892eSInki Dae DRM_ERROR("failed to remap user space.\n"); 5392b35892eSInki Dae return ret; 5402b35892eSInki Dae } 5412b35892eSInki Dae 5422b35892eSInki Dae uaddr += PAGE_SIZE; 5432b35892eSInki Dae usize -= PAGE_SIZE; 5442b35892eSInki Dae } while (usize > 0); 5452b35892eSInki Dae } else { 5461c248b7dSInki Dae /* 5471c248b7dSInki Dae * get page frame number to physical memory to be mapped 5481c248b7dSInki Dae * to user space. 5491c248b7dSInki Dae */ 5502b35892eSInki Dae pfn = ((unsigned long)exynos_gem_obj->buffer->dma_addr) >> 5512b35892eSInki Dae PAGE_SHIFT; 5521c248b7dSInki Dae 5531c248b7dSInki Dae DRM_DEBUG_KMS("pfn = 0x%lx\n", pfn); 5541c248b7dSInki Dae 5551c248b7dSInki Dae if (remap_pfn_range(vma, vma->vm_start, pfn, vm_size, 5561c248b7dSInki Dae vma->vm_page_prot)) { 5571c248b7dSInki Dae DRM_ERROR("failed to remap pfn range.\n"); 5581c248b7dSInki Dae return -EAGAIN; 5591c248b7dSInki Dae } 5602b35892eSInki Dae } 5611c248b7dSInki Dae 5621c248b7dSInki Dae return 0; 5631c248b7dSInki Dae } 5641c248b7dSInki Dae 5651c248b7dSInki Dae static const struct file_operations exynos_drm_gem_fops = { 5661c248b7dSInki Dae .mmap = exynos_drm_gem_mmap_buffer, 5671c248b7dSInki Dae }; 5681c248b7dSInki Dae 5691c248b7dSInki Dae int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 5701c248b7dSInki Dae struct drm_file *file_priv) 5711c248b7dSInki Dae { 5721c248b7dSInki Dae struct drm_exynos_gem_mmap *args = data; 5731c248b7dSInki Dae struct drm_gem_object *obj; 5741c248b7dSInki Dae unsigned int addr; 5751c248b7dSInki Dae 5761c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 5771c248b7dSInki Dae 5781c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 5791c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 5801c248b7dSInki Dae return -ENODEV; 5811c248b7dSInki Dae } 5821c248b7dSInki Dae 5831c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 5841c248b7dSInki Dae if (!obj) { 5851c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 5861c248b7dSInki Dae return -EINVAL; 5871c248b7dSInki Dae } 5881c248b7dSInki Dae 5891c248b7dSInki Dae obj->filp->f_op = &exynos_drm_gem_fops; 5901c248b7dSInki Dae obj->filp->private_data = obj; 5911c248b7dSInki Dae 5926be5ceb0SLinus Torvalds addr = vm_mmap(obj->filp, 0, args->size, 5931c248b7dSInki Dae PROT_READ | PROT_WRITE, MAP_SHARED, 0); 5941c248b7dSInki Dae 5951c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 5961c248b7dSInki Dae 5971c248b7dSInki Dae if (IS_ERR((void *)addr)) 5981c248b7dSInki Dae return PTR_ERR((void *)addr); 5991c248b7dSInki Dae 6001c248b7dSInki Dae args->mapped = addr; 6011c248b7dSInki Dae 6021c248b7dSInki Dae DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); 6031c248b7dSInki Dae 6041c248b7dSInki Dae return 0; 6051c248b7dSInki Dae } 6061c248b7dSInki Dae 6071c248b7dSInki Dae int exynos_drm_gem_init_object(struct drm_gem_object *obj) 6081c248b7dSInki Dae { 6091c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 6101c248b7dSInki Dae 6111c248b7dSInki Dae return 0; 6121c248b7dSInki Dae } 6131c248b7dSInki Dae 614ee5e770eSJoonyoung Shim void exynos_drm_gem_free_object(struct drm_gem_object *obj) 6151c248b7dSInki Dae { 616b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 617b2df26c1SInki Dae struct exynos_drm_gem_buf *buf; 618b2df26c1SInki Dae 6191c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 6201c248b7dSInki Dae 621b2df26c1SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 622b2df26c1SInki Dae buf = exynos_gem_obj->buffer; 623b2df26c1SInki Dae 624b2df26c1SInki Dae if (obj->import_attach) 625b2df26c1SInki Dae drm_prime_gem_destroy(obj, buf->sgt); 626b2df26c1SInki Dae 6272364839aSJoonyoung Shim exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); 6281c248b7dSInki Dae } 6291c248b7dSInki Dae 6301c248b7dSInki Dae int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 631ee5e770eSJoonyoung Shim struct drm_device *dev, 632ee5e770eSJoonyoung Shim struct drm_mode_create_dumb *args) 6331c248b7dSInki Dae { 6341c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 6352364839aSJoonyoung Shim int ret; 6361c248b7dSInki Dae 6371c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 6381c248b7dSInki Dae 6391c248b7dSInki Dae /* 6401c248b7dSInki Dae * alocate memory to be used for framebuffer. 6411c248b7dSInki Dae * - this callback would be called by user application 6421c248b7dSInki Dae * with DRM_IOCTL_MODE_CREATE_DUMB command. 6431c248b7dSInki Dae */ 6441c248b7dSInki Dae 6451c248b7dSInki Dae args->pitch = args->width * args->bpp >> 3; 6462b35892eSInki Dae args->size = PAGE_ALIGN(args->pitch * args->height); 6471c248b7dSInki Dae 6482b35892eSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); 6491c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 6501c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 6511c248b7dSInki Dae 6522364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 6532364839aSJoonyoung Shim &args->handle); 6542364839aSJoonyoung Shim if (ret) { 6552364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 6562364839aSJoonyoung Shim return ret; 6572364839aSJoonyoung Shim } 6582364839aSJoonyoung Shim 6591c248b7dSInki Dae return 0; 6601c248b7dSInki Dae } 6611c248b7dSInki Dae 6621c248b7dSInki Dae int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 663ee5e770eSJoonyoung Shim struct drm_device *dev, uint32_t handle, 664ee5e770eSJoonyoung Shim uint64_t *offset) 6651c248b7dSInki Dae { 6661c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 6671c248b7dSInki Dae struct drm_gem_object *obj; 6682d91cf17SJoonyoung Shim int ret = 0; 6691c248b7dSInki Dae 6701c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 6711c248b7dSInki Dae 6721c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 6731c248b7dSInki Dae 6741c248b7dSInki Dae /* 6751c248b7dSInki Dae * get offset of memory allocated for drm framebuffer. 6761c248b7dSInki Dae * - this callback would be called by user application 6771c248b7dSInki Dae * with DRM_IOCTL_MODE_MAP_DUMB command. 6781c248b7dSInki Dae */ 6791c248b7dSInki Dae 6801c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, handle); 6811c248b7dSInki Dae if (!obj) { 6821c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 6832d91cf17SJoonyoung Shim ret = -EINVAL; 6842d91cf17SJoonyoung Shim goto unlock; 6851c248b7dSInki Dae } 6861c248b7dSInki Dae 6871c248b7dSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 6881c248b7dSInki Dae 6892d91cf17SJoonyoung Shim if (!exynos_gem_obj->base.map_list.map) { 6902d91cf17SJoonyoung Shim ret = drm_gem_create_mmap_offset(&exynos_gem_obj->base); 6912d91cf17SJoonyoung Shim if (ret) 6922d91cf17SJoonyoung Shim goto out; 6932d91cf17SJoonyoung Shim } 6941c248b7dSInki Dae 6952d91cf17SJoonyoung Shim *offset = (u64)exynos_gem_obj->base.map_list.hash.key << PAGE_SHIFT; 6961c248b7dSInki Dae DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); 6971c248b7dSInki Dae 6982d91cf17SJoonyoung Shim out: 6992d91cf17SJoonyoung Shim drm_gem_object_unreference(obj); 7002d91cf17SJoonyoung Shim unlock: 7011c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 7022d91cf17SJoonyoung Shim return ret; 7031c248b7dSInki Dae } 7041c248b7dSInki Dae 705ee5e770eSJoonyoung Shim int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, 706ee5e770eSJoonyoung Shim struct drm_device *dev, 707ee5e770eSJoonyoung Shim unsigned int handle) 708ee5e770eSJoonyoung Shim { 709ee5e770eSJoonyoung Shim int ret; 710ee5e770eSJoonyoung Shim 711ee5e770eSJoonyoung Shim DRM_DEBUG_KMS("%s\n", __FILE__); 712ee5e770eSJoonyoung Shim 713ee5e770eSJoonyoung Shim /* 714ee5e770eSJoonyoung Shim * obj->refcount and obj->handle_count are decreased and 715ee5e770eSJoonyoung Shim * if both them are 0 then exynos_drm_gem_free_object() 716ee5e770eSJoonyoung Shim * would be called by callback to release resources. 717ee5e770eSJoonyoung Shim */ 718ee5e770eSJoonyoung Shim ret = drm_gem_handle_delete(file_priv, handle); 719ee5e770eSJoonyoung Shim if (ret < 0) { 720ee5e770eSJoonyoung Shim DRM_ERROR("failed to delete drm_gem_handle.\n"); 721ee5e770eSJoonyoung Shim return ret; 722ee5e770eSJoonyoung Shim } 723ee5e770eSJoonyoung Shim 724ee5e770eSJoonyoung Shim return 0; 725ee5e770eSJoonyoung Shim } 726ee5e770eSJoonyoung Shim 7271c248b7dSInki Dae int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 7281c248b7dSInki Dae { 7291c248b7dSInki Dae struct drm_gem_object *obj = vma->vm_private_data; 7301c248b7dSInki Dae struct drm_device *dev = obj->dev; 7312b35892eSInki Dae unsigned long f_vaddr; 7321c248b7dSInki Dae pgoff_t page_offset; 7331c248b7dSInki Dae int ret; 7341c248b7dSInki Dae 7351c248b7dSInki Dae page_offset = ((unsigned long)vmf->virtual_address - 7361c248b7dSInki Dae vma->vm_start) >> PAGE_SHIFT; 7372b35892eSInki Dae f_vaddr = (unsigned long)vmf->virtual_address; 7381c248b7dSInki Dae 7391c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 7401c248b7dSInki Dae 7412b35892eSInki Dae ret = exynos_drm_gem_map_pages(obj, vma, f_vaddr, page_offset); 7422b35892eSInki Dae if (ret < 0) 7432b35892eSInki Dae DRM_ERROR("failed to map pages.\n"); 7441c248b7dSInki Dae 7451c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 7461c248b7dSInki Dae 7471c248b7dSInki Dae return convert_to_vm_err_msg(ret); 7481c248b7dSInki Dae } 7491c248b7dSInki Dae 7501c248b7dSInki Dae int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 7511c248b7dSInki Dae { 752c01d73faSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 753c01d73faSInki Dae struct drm_gem_object *obj; 7541c248b7dSInki Dae int ret; 7551c248b7dSInki Dae 7561c248b7dSInki Dae DRM_DEBUG_KMS("%s\n", __FILE__); 7571c248b7dSInki Dae 7581c248b7dSInki Dae /* set vm_area_struct. */ 7591c248b7dSInki Dae ret = drm_gem_mmap(filp, vma); 7601c248b7dSInki Dae if (ret < 0) { 7611c248b7dSInki Dae DRM_ERROR("failed to mmap.\n"); 7621c248b7dSInki Dae return ret; 7631c248b7dSInki Dae } 7641c248b7dSInki Dae 765c01d73faSInki Dae obj = vma->vm_private_data; 766c01d73faSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 767c01d73faSInki Dae 768c01d73faSInki Dae ret = check_gem_flags(exynos_gem_obj->flags); 769c01d73faSInki Dae if (ret) { 770c01d73faSInki Dae drm_gem_vm_close(vma); 771c01d73faSInki Dae drm_gem_free_mmap_offset(obj); 772c01d73faSInki Dae return ret; 773c01d73faSInki Dae } 774c01d73faSInki Dae 7751c248b7dSInki Dae vma->vm_flags &= ~VM_PFNMAP; 7761c248b7dSInki Dae vma->vm_flags |= VM_MIXEDMAP; 7771c248b7dSInki Dae 778c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 779c01d73faSInki Dae 7801c248b7dSInki Dae return ret; 7811c248b7dSInki Dae } 782