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 * 6d81aecb5SInki Dae * This program is free software; you can redistribute it and/or modify it 7d81aecb5SInki Dae * under the terms of the GNU General Public License as published by the 8d81aecb5SInki Dae * Free Software Foundation; either version 2 of the License, or (at your 9d81aecb5SInki Dae * option) any later version. 101c248b7dSInki Dae */ 111c248b7dSInki Dae 12760285e7SDavid Howells #include <drm/drmP.h> 131c248b7dSInki Dae 142b35892eSInki Dae #include <linux/shmem_fs.h> 151c248b7dSInki Dae #include <drm/exynos_drm.h> 161c248b7dSInki Dae 171c248b7dSInki Dae #include "exynos_drm_drv.h" 181c248b7dSInki Dae #include "exynos_drm_gem.h" 191c248b7dSInki Dae #include "exynos_drm_buf.h" 201c248b7dSInki Dae 211c248b7dSInki Dae static unsigned int convert_to_vm_err_msg(int msg) 221c248b7dSInki Dae { 231c248b7dSInki Dae unsigned int out_msg; 241c248b7dSInki Dae 251c248b7dSInki Dae switch (msg) { 261c248b7dSInki Dae case 0: 271c248b7dSInki Dae case -ERESTARTSYS: 281c248b7dSInki Dae case -EINTR: 291c248b7dSInki Dae out_msg = VM_FAULT_NOPAGE; 301c248b7dSInki Dae break; 311c248b7dSInki Dae 321c248b7dSInki Dae case -ENOMEM: 331c248b7dSInki Dae out_msg = VM_FAULT_OOM; 341c248b7dSInki Dae break; 351c248b7dSInki Dae 361c248b7dSInki Dae default: 371c248b7dSInki Dae out_msg = VM_FAULT_SIGBUS; 381c248b7dSInki Dae break; 391c248b7dSInki Dae } 401c248b7dSInki Dae 411c248b7dSInki Dae return out_msg; 421c248b7dSInki Dae } 431c248b7dSInki Dae 44dcf9af82SInki Dae static int check_gem_flags(unsigned int flags) 452b35892eSInki Dae { 46dcf9af82SInki Dae if (flags & ~(EXYNOS_BO_MASK)) { 47dcf9af82SInki Dae DRM_ERROR("invalid flags.\n"); 48dcf9af82SInki Dae return -EINVAL; 49dcf9af82SInki Dae } 50dcf9af82SInki Dae 51dcf9af82SInki Dae return 0; 52dcf9af82SInki Dae } 53dcf9af82SInki Dae 54c01d73faSInki Dae static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, 55c01d73faSInki Dae struct vm_area_struct *vma) 56c01d73faSInki Dae { 57c01d73faSInki Dae DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); 58c01d73faSInki Dae 59c01d73faSInki Dae /* non-cachable as default. */ 60c01d73faSInki Dae if (obj->flags & EXYNOS_BO_CACHABLE) 61c01d73faSInki Dae vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 62c01d73faSInki Dae else if (obj->flags & EXYNOS_BO_WC) 63c01d73faSInki Dae vma->vm_page_prot = 64c01d73faSInki Dae pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 65c01d73faSInki Dae else 66c01d73faSInki Dae vma->vm_page_prot = 67c01d73faSInki Dae pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 68c01d73faSInki Dae } 69c01d73faSInki Dae 70dcf9af82SInki Dae static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) 71dcf9af82SInki Dae { 720519f9a1SInki Dae /* TODO */ 730519f9a1SInki Dae 74dcf9af82SInki Dae return roundup(size, PAGE_SIZE); 752b35892eSInki Dae } 762b35892eSInki Dae 770519f9a1SInki Dae static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, 782b35892eSInki Dae struct vm_area_struct *vma, 792b35892eSInki Dae unsigned long f_vaddr, 802b35892eSInki Dae pgoff_t page_offset) 812b35892eSInki Dae { 822b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 832b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 844ddc404bSRahul Sharma struct scatterlist *sgl; 852b35892eSInki Dae unsigned long pfn; 864ddc404bSRahul Sharma int i; 872b35892eSInki Dae 884ddc404bSRahul Sharma if (!buf->sgt) 894ddc404bSRahul Sharma return -EINTR; 904ddc404bSRahul Sharma 91465ed660SPrathyush K if (page_offset >= (buf->size >> PAGE_SHIFT)) { 92465ed660SPrathyush K DRM_ERROR("invalid page offset\n"); 93465ed660SPrathyush K return -EINVAL; 94465ed660SPrathyush K } 95465ed660SPrathyush K 964ddc404bSRahul Sharma sgl = buf->sgt->sgl; 974ddc404bSRahul Sharma for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { 984ddc404bSRahul Sharma if (page_offset < (sgl->length >> PAGE_SHIFT)) 994ddc404bSRahul Sharma break; 1004ddc404bSRahul Sharma page_offset -= (sgl->length >> PAGE_SHIFT); 1014ddc404bSRahul Sharma } 1024ddc404bSRahul Sharma 1034ddc404bSRahul Sharma pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; 1042b35892eSInki Dae 1052b35892eSInki Dae return vm_insert_mixed(vma, f_vaddr, pfn); 1062b35892eSInki Dae } 1072b35892eSInki Dae 1082364839aSJoonyoung Shim static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, 1092364839aSJoonyoung Shim struct drm_file *file_priv, 1102364839aSJoonyoung Shim unsigned int *handle) 1111c248b7dSInki Dae { 1121c248b7dSInki Dae int ret; 1131c248b7dSInki Dae 1141c248b7dSInki Dae /* 1151c248b7dSInki Dae * allocate a id of idr table where the obj is registered 1161c248b7dSInki Dae * and handle has the id what user can see. 1171c248b7dSInki Dae */ 1181c248b7dSInki Dae ret = drm_gem_handle_create(file_priv, obj, handle); 1191c248b7dSInki Dae if (ret) 1202364839aSJoonyoung Shim return ret; 1211c248b7dSInki Dae 1221c248b7dSInki Dae DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); 1231c248b7dSInki Dae 1241c248b7dSInki Dae /* drop reference from allocate - handle holds it now. */ 1251c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 1261c248b7dSInki Dae 1272364839aSJoonyoung Shim return 0; 1282364839aSJoonyoung Shim } 1291c248b7dSInki Dae 1302364839aSJoonyoung Shim void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) 1312364839aSJoonyoung Shim { 1322364839aSJoonyoung Shim struct drm_gem_object *obj; 133c01d73faSInki Dae struct exynos_drm_gem_buf *buf; 1342364839aSJoonyoung Shim 1352364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 136c01d73faSInki Dae buf = exynos_gem_obj->buffer; 1372364839aSJoonyoung Shim 1382364839aSJoonyoung Shim DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); 1392364839aSJoonyoung Shim 140c374e731SInki Dae /* 141c374e731SInki Dae * do not release memory region from exporter. 142c374e731SInki Dae * 143c374e731SInki Dae * the region will be released by exporter 144c374e731SInki Dae * once dmabuf's refcount becomes 0. 145c374e731SInki Dae */ 146c374e731SInki Dae if (obj->import_attach) 147c374e731SInki Dae goto out; 148c374e731SInki Dae 149c01d73faSInki Dae exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); 1502b35892eSInki Dae 151c374e731SInki Dae out: 152c01d73faSInki Dae exynos_drm_fini_buf(obj->dev, buf); 1532b35892eSInki Dae exynos_gem_obj->buffer = NULL; 1542364839aSJoonyoung Shim 1552364839aSJoonyoung Shim if (obj->map_list.map) 1562364839aSJoonyoung Shim drm_gem_free_mmap_offset(obj); 1572364839aSJoonyoung Shim 1582364839aSJoonyoung Shim /* release file pointer to gem object. */ 1591c248b7dSInki Dae drm_gem_object_release(obj); 1601c248b7dSInki Dae 1611c248b7dSInki Dae kfree(exynos_gem_obj); 1622b35892eSInki Dae exynos_gem_obj = NULL; 1632364839aSJoonyoung Shim } 1642364839aSJoonyoung Shim 165a4f19aaaSInki Dae unsigned long exynos_drm_gem_get_size(struct drm_device *dev, 166a4f19aaaSInki Dae unsigned int gem_handle, 167a4f19aaaSInki Dae struct drm_file *file_priv) 168a4f19aaaSInki Dae { 169a4f19aaaSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 170a4f19aaaSInki Dae struct drm_gem_object *obj; 171a4f19aaaSInki Dae 172a4f19aaaSInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 173a4f19aaaSInki Dae if (!obj) { 174a4f19aaaSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 175a4f19aaaSInki Dae return 0; 176a4f19aaaSInki Dae } 177a4f19aaaSInki Dae 178a4f19aaaSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 179a4f19aaaSInki Dae 180a4f19aaaSInki Dae drm_gem_object_unreference_unlocked(obj); 181a4f19aaaSInki Dae 182a4f19aaaSInki Dae return exynos_gem_obj->buffer->size; 183a4f19aaaSInki Dae } 184a4f19aaaSInki Dae 185a4f19aaaSInki Dae 186b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, 1872364839aSJoonyoung Shim unsigned long size) 1882364839aSJoonyoung Shim { 1892364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 1902364839aSJoonyoung Shim struct drm_gem_object *obj; 1912364839aSJoonyoung Shim int ret; 1922364839aSJoonyoung Shim 1932364839aSJoonyoung Shim exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); 1942364839aSJoonyoung Shim if (!exynos_gem_obj) { 1952364839aSJoonyoung Shim DRM_ERROR("failed to allocate exynos gem object\n"); 1962364839aSJoonyoung Shim return NULL; 1972364839aSJoonyoung Shim } 1982364839aSJoonyoung Shim 1992b35892eSInki Dae exynos_gem_obj->size = size; 2002364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 2012364839aSJoonyoung Shim 2022364839aSJoonyoung Shim ret = drm_gem_object_init(dev, obj, size); 2032364839aSJoonyoung Shim if (ret < 0) { 2042364839aSJoonyoung Shim DRM_ERROR("failed to initialize gem object\n"); 2052364839aSJoonyoung Shim kfree(exynos_gem_obj); 2062364839aSJoonyoung Shim return NULL; 2072364839aSJoonyoung Shim } 2082364839aSJoonyoung Shim 2092364839aSJoonyoung Shim DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); 2102364839aSJoonyoung Shim 2112364839aSJoonyoung Shim return exynos_gem_obj; 2121c248b7dSInki Dae } 2131c248b7dSInki Dae 214f088d5a9SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 2152b35892eSInki Dae unsigned int flags, 216ee5e770eSJoonyoung Shim unsigned long size) 217f088d5a9SInki Dae { 2182364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 2192b35892eSInki Dae struct exynos_drm_gem_buf *buf; 2202b35892eSInki Dae int ret; 221f088d5a9SInki Dae 222dcf9af82SInki Dae if (!size) { 223dcf9af82SInki Dae DRM_ERROR("invalid size.\n"); 224dcf9af82SInki Dae return ERR_PTR(-EINVAL); 225dcf9af82SInki Dae } 226f088d5a9SInki Dae 227dcf9af82SInki Dae size = roundup_gem_size(size, flags); 228dcf9af82SInki Dae 229dcf9af82SInki Dae ret = check_gem_flags(flags); 230dcf9af82SInki Dae if (ret) 231dcf9af82SInki Dae return ERR_PTR(ret); 2322b35892eSInki Dae 2332b35892eSInki Dae buf = exynos_drm_init_buf(dev, size); 2342b35892eSInki Dae if (!buf) 235ee5e770eSJoonyoung Shim return ERR_PTR(-ENOMEM); 236f088d5a9SInki Dae 2372364839aSJoonyoung Shim exynos_gem_obj = exynos_drm_gem_init(dev, size); 2382364839aSJoonyoung Shim if (!exynos_gem_obj) { 2392b35892eSInki Dae ret = -ENOMEM; 240dcf9af82SInki Dae goto err_fini_buf; 241f088d5a9SInki Dae } 242f088d5a9SInki Dae 2432b35892eSInki Dae exynos_gem_obj->buffer = buf; 2442b35892eSInki Dae 2452b35892eSInki Dae /* set memory type and cache attribute from user side. */ 2462b35892eSInki Dae exynos_gem_obj->flags = flags; 2472b35892eSInki Dae 2482b35892eSInki Dae ret = exynos_drm_alloc_buf(dev, buf, flags); 2492b35892eSInki Dae if (ret < 0) { 2502b35892eSInki Dae drm_gem_object_release(&exynos_gem_obj->base); 251dcf9af82SInki Dae goto err_fini_buf; 2522b35892eSInki Dae } 253f088d5a9SInki Dae 254f088d5a9SInki Dae return exynos_gem_obj; 255dcf9af82SInki Dae 256dcf9af82SInki Dae err_fini_buf: 2572b35892eSInki Dae exynos_drm_fini_buf(dev, buf); 2582b35892eSInki Dae return ERR_PTR(ret); 259f088d5a9SInki Dae } 260f088d5a9SInki Dae 2611c248b7dSInki Dae int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 2621c248b7dSInki Dae struct drm_file *file_priv) 2631c248b7dSInki Dae { 2641c248b7dSInki Dae struct drm_exynos_gem_create *args = data; 265ee5e770eSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 2662364839aSJoonyoung Shim int ret; 2671c248b7dSInki Dae 2682b35892eSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); 2691c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 2701c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 2711c248b7dSInki Dae 2722364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 2732364839aSJoonyoung Shim &args->handle); 2742364839aSJoonyoung Shim if (ret) { 2752364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 2762364839aSJoonyoung Shim return ret; 2772364839aSJoonyoung Shim } 2782364839aSJoonyoung Shim 2791c248b7dSInki Dae return 0; 2801c248b7dSInki Dae } 2811c248b7dSInki Dae 282d87342c1SInki Dae dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, 283f0b1bda7SInki Dae unsigned int gem_handle, 284d87342c1SInki Dae struct drm_file *filp) 285f0b1bda7SInki Dae { 286f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 287f0b1bda7SInki Dae struct drm_gem_object *obj; 288f0b1bda7SInki Dae 289d87342c1SInki Dae obj = drm_gem_object_lookup(dev, filp, gem_handle); 290f0b1bda7SInki Dae if (!obj) { 291f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 292f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 293f0b1bda7SInki Dae } 294f0b1bda7SInki Dae 295f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 296f0b1bda7SInki Dae 297f0b1bda7SInki Dae return &exynos_gem_obj->buffer->dma_addr; 298f0b1bda7SInki Dae } 299f0b1bda7SInki Dae 300f0b1bda7SInki Dae void exynos_drm_gem_put_dma_addr(struct drm_device *dev, 301f0b1bda7SInki Dae unsigned int gem_handle, 302d87342c1SInki Dae struct drm_file *filp) 303f0b1bda7SInki Dae { 304f0b1bda7SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 305f0b1bda7SInki Dae struct drm_gem_object *obj; 306f0b1bda7SInki Dae 307d87342c1SInki Dae obj = drm_gem_object_lookup(dev, filp, gem_handle); 308f0b1bda7SInki Dae if (!obj) { 309f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 310f0b1bda7SInki Dae return; 311f0b1bda7SInki Dae } 312f0b1bda7SInki Dae 313f0b1bda7SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 314f0b1bda7SInki Dae 315f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 316f0b1bda7SInki Dae 317f0b1bda7SInki Dae /* 318f0b1bda7SInki Dae * decrease obj->refcount one more time because we has already 319f0b1bda7SInki Dae * increased it at exynos_drm_gem_get_dma_addr(). 320f0b1bda7SInki Dae */ 321f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 322f0b1bda7SInki Dae } 323f0b1bda7SInki Dae 3241c248b7dSInki Dae int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, 3251c248b7dSInki Dae struct drm_file *file_priv) 3261c248b7dSInki Dae { 3271c248b7dSInki Dae struct drm_exynos_gem_map_off *args = data; 3281c248b7dSInki Dae 3291c248b7dSInki Dae DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", 3301c248b7dSInki Dae args->handle, (unsigned long)args->offset); 3311c248b7dSInki Dae 3321c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 3331c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 3341c248b7dSInki Dae return -ENODEV; 3351c248b7dSInki Dae } 3361c248b7dSInki Dae 3371c248b7dSInki Dae return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, 3381c248b7dSInki Dae &args->offset); 3391c248b7dSInki Dae } 3401c248b7dSInki Dae 3415b07c660SInki Dae static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, 3425b07c660SInki Dae struct file *filp) 3435b07c660SInki Dae { 3445b07c660SInki Dae struct drm_file *file_priv; 3455b07c660SInki Dae 3465b07c660SInki Dae /* find current process's drm_file from filelist. */ 3475af9f116SYoungJun Cho list_for_each_entry(file_priv, &drm_dev->filelist, lhead) 3485af9f116SYoungJun Cho if (file_priv->filp == filp) 3495b07c660SInki Dae return file_priv; 3505b07c660SInki Dae 3515b07c660SInki Dae WARN_ON(1); 3525b07c660SInki Dae 3535b07c660SInki Dae return ERR_PTR(-EFAULT); 3545b07c660SInki Dae } 3555b07c660SInki Dae 3561c248b7dSInki Dae static int exynos_drm_gem_mmap_buffer(struct file *filp, 3571c248b7dSInki Dae struct vm_area_struct *vma) 3581c248b7dSInki Dae { 3591c248b7dSInki Dae struct drm_gem_object *obj = filp->private_data; 3601c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 3615b07c660SInki Dae struct drm_device *drm_dev = obj->dev; 3622c871127SInki Dae struct exynos_drm_gem_buf *buffer; 3635b07c660SInki Dae struct drm_file *file_priv; 3640519f9a1SInki Dae unsigned long vm_size; 3655b07c660SInki Dae int ret; 3661c248b7dSInki Dae 367314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; 3685b07c660SInki Dae vma->vm_private_data = obj; 3695b07c660SInki Dae vma->vm_ops = drm_dev->driver->gem_vm_ops; 3705b07c660SInki Dae 3715b07c660SInki Dae /* restore it to driver's fops. */ 3725b07c660SInki Dae filp->f_op = fops_get(drm_dev->driver->fops); 3735b07c660SInki Dae 3745b07c660SInki Dae file_priv = exynos_drm_find_drm_file(drm_dev, filp); 3755b07c660SInki Dae if (IS_ERR(file_priv)) 3765b07c660SInki Dae return PTR_ERR(file_priv); 3775b07c660SInki Dae 3785b07c660SInki Dae /* restore it to drm_file. */ 3795b07c660SInki Dae filp->private_data = file_priv; 3801c248b7dSInki Dae 381c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 3821c248b7dSInki Dae 3830519f9a1SInki Dae vm_size = vma->vm_end - vma->vm_start; 3842b35892eSInki Dae 3851c248b7dSInki Dae /* 3862c871127SInki Dae * a buffer contains information to physically continuous memory 3871c248b7dSInki Dae * allocated by user request or at framebuffer creation. 3881c248b7dSInki Dae */ 3892c871127SInki Dae buffer = exynos_gem_obj->buffer; 3901c248b7dSInki Dae 3911c248b7dSInki Dae /* check if user-requested size is valid. */ 3922c871127SInki Dae if (vm_size > buffer->size) 3931c248b7dSInki Dae return -EINVAL; 3941c248b7dSInki Dae 3954744ad24SInki Dae ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, 3960519f9a1SInki Dae buffer->dma_addr, buffer->size, 3970519f9a1SInki Dae &buffer->dma_attrs); 3985b07c660SInki Dae if (ret < 0) { 3995b07c660SInki Dae DRM_ERROR("failed to mmap.\n"); 4005b07c660SInki Dae return ret; 4015b07c660SInki Dae } 4025b07c660SInki Dae 4035b07c660SInki Dae /* 4045b07c660SInki Dae * take a reference to this mapping of the object. And this reference 4055b07c660SInki Dae * is unreferenced by the corresponding vm_close call. 4065b07c660SInki Dae */ 4075b07c660SInki Dae drm_gem_object_reference(obj); 4085b07c660SInki Dae 4095b07c660SInki Dae drm_vm_open_locked(drm_dev, vma); 4105b07c660SInki Dae 4115b07c660SInki Dae return 0; 4121c248b7dSInki Dae } 4131c248b7dSInki Dae 4141c248b7dSInki Dae static const struct file_operations exynos_drm_gem_fops = { 4151c248b7dSInki Dae .mmap = exynos_drm_gem_mmap_buffer, 4161c248b7dSInki Dae }; 4171c248b7dSInki Dae 4181c248b7dSInki Dae int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 4191c248b7dSInki Dae struct drm_file *file_priv) 4201c248b7dSInki Dae { 4211c248b7dSInki Dae struct drm_exynos_gem_mmap *args = data; 4221c248b7dSInki Dae struct drm_gem_object *obj; 42323f340e0SInki Dae unsigned long addr; 4241c248b7dSInki Dae 4251c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 4261c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 4271c248b7dSInki Dae return -ENODEV; 4281c248b7dSInki Dae } 4291c248b7dSInki Dae 4301c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 4311c248b7dSInki Dae if (!obj) { 4321c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 4331c248b7dSInki Dae return -EINVAL; 4341c248b7dSInki Dae } 4351c248b7dSInki Dae 4365b07c660SInki Dae /* 4375af9f116SYoungJun Cho * We have to use gem object and its fops for specific mmaper, 4385af9f116SYoungJun Cho * but vm_mmap() can deliver only filp. So we have to change 4395af9f116SYoungJun Cho * filp->f_op and filp->private_data temporarily, then restore 4405af9f116SYoungJun Cho * again. So it is important to keep lock until restoration the 4415af9f116SYoungJun Cho * settings to prevent others from misuse of filp->f_op or 4425af9f116SYoungJun Cho * filp->private_data. 4435af9f116SYoungJun Cho */ 4445af9f116SYoungJun Cho mutex_lock(&dev->struct_mutex); 4455af9f116SYoungJun Cho 4465af9f116SYoungJun Cho /* 4475b07c660SInki Dae * Set specific mmper's fops. And it will be restored by 4485b07c660SInki Dae * exynos_drm_gem_mmap_buffer to dev->driver->fops. 4495b07c660SInki Dae * This is used to call specific mapper temporarily. 4505b07c660SInki Dae */ 4515b07c660SInki Dae file_priv->filp->f_op = &exynos_drm_gem_fops; 4521c248b7dSInki Dae 4535b07c660SInki Dae /* 4545b07c660SInki Dae * Set gem object to private_data so that specific mmaper 4555b07c660SInki Dae * can get the gem object. And it will be restored by 4565b07c660SInki Dae * exynos_drm_gem_mmap_buffer to drm_file. 4575b07c660SInki Dae */ 4585b07c660SInki Dae file_priv->filp->private_data = obj; 4595b07c660SInki Dae 4605b07c660SInki Dae addr = vm_mmap(file_priv->filp, 0, args->size, 4611c248b7dSInki Dae PROT_READ | PROT_WRITE, MAP_SHARED, 0); 4621c248b7dSInki Dae 4635af9f116SYoungJun Cho drm_gem_object_unreference(obj); 4641c248b7dSInki Dae 46523f340e0SInki Dae if (IS_ERR_VALUE(addr)) { 4665af9f116SYoungJun Cho /* check filp->f_op, filp->private_data are restored */ 4675af9f116SYoungJun Cho if (file_priv->filp->f_op == &exynos_drm_gem_fops) { 4685af9f116SYoungJun Cho file_priv->filp->f_op = fops_get(dev->driver->fops); 4695b07c660SInki Dae file_priv->filp->private_data = file_priv; 4705af9f116SYoungJun Cho } 4715af9f116SYoungJun Cho mutex_unlock(&dev->struct_mutex); 47223f340e0SInki Dae return (int)addr; 4735b07c660SInki Dae } 4741c248b7dSInki Dae 4755af9f116SYoungJun Cho mutex_unlock(&dev->struct_mutex); 4765af9f116SYoungJun Cho 4771c248b7dSInki Dae args->mapped = addr; 4781c248b7dSInki Dae 4791c248b7dSInki Dae DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); 4801c248b7dSInki Dae 4811c248b7dSInki Dae return 0; 4821c248b7dSInki Dae } 4831c248b7dSInki Dae 48440cd7e0cSInki Dae int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 48540cd7e0cSInki Dae struct drm_file *file_priv) 48640cd7e0cSInki Dae { struct exynos_drm_gem_obj *exynos_gem_obj; 48740cd7e0cSInki Dae struct drm_exynos_gem_info *args = data; 48840cd7e0cSInki Dae struct drm_gem_object *obj; 48940cd7e0cSInki Dae 49040cd7e0cSInki Dae mutex_lock(&dev->struct_mutex); 49140cd7e0cSInki Dae 49240cd7e0cSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 49340cd7e0cSInki Dae if (!obj) { 49440cd7e0cSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 49540cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 49640cd7e0cSInki Dae return -EINVAL; 49740cd7e0cSInki Dae } 49840cd7e0cSInki Dae 49940cd7e0cSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 50040cd7e0cSInki Dae 50140cd7e0cSInki Dae args->flags = exynos_gem_obj->flags; 50240cd7e0cSInki Dae args->size = exynos_gem_obj->size; 50340cd7e0cSInki Dae 50440cd7e0cSInki Dae drm_gem_object_unreference(obj); 50540cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 50640cd7e0cSInki Dae 50740cd7e0cSInki Dae return 0; 50840cd7e0cSInki Dae } 50940cd7e0cSInki Dae 5102a3098ffSInki Dae struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) 5112a3098ffSInki Dae { 5122a3098ffSInki Dae struct vm_area_struct *vma_copy; 5132a3098ffSInki Dae 5142a3098ffSInki Dae vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); 5152a3098ffSInki Dae if (!vma_copy) 5162a3098ffSInki Dae return NULL; 5172a3098ffSInki Dae 5182a3098ffSInki Dae if (vma->vm_ops && vma->vm_ops->open) 5192a3098ffSInki Dae vma->vm_ops->open(vma); 5202a3098ffSInki Dae 5212a3098ffSInki Dae if (vma->vm_file) 5222a3098ffSInki Dae get_file(vma->vm_file); 5232a3098ffSInki Dae 5242a3098ffSInki Dae memcpy(vma_copy, vma, sizeof(*vma)); 5252a3098ffSInki Dae 5262a3098ffSInki Dae vma_copy->vm_mm = NULL; 5272a3098ffSInki Dae vma_copy->vm_next = NULL; 5282a3098ffSInki Dae vma_copy->vm_prev = NULL; 5292a3098ffSInki Dae 5302a3098ffSInki Dae return vma_copy; 5312a3098ffSInki Dae } 5322a3098ffSInki Dae 5332a3098ffSInki Dae void exynos_gem_put_vma(struct vm_area_struct *vma) 5342a3098ffSInki Dae { 5352a3098ffSInki Dae if (!vma) 5362a3098ffSInki Dae return; 5372a3098ffSInki Dae 5382a3098ffSInki Dae if (vma->vm_ops && vma->vm_ops->close) 5392a3098ffSInki Dae vma->vm_ops->close(vma); 5402a3098ffSInki Dae 5412a3098ffSInki Dae if (vma->vm_file) 5422a3098ffSInki Dae fput(vma->vm_file); 5432a3098ffSInki Dae 5442a3098ffSInki Dae kfree(vma); 5452a3098ffSInki Dae } 5462a3098ffSInki Dae 5472a3098ffSInki Dae int exynos_gem_get_pages_from_userptr(unsigned long start, 5482a3098ffSInki Dae unsigned int npages, 5492a3098ffSInki Dae struct page **pages, 5502a3098ffSInki Dae struct vm_area_struct *vma) 5512a3098ffSInki Dae { 5522a3098ffSInki Dae int get_npages; 5532a3098ffSInki Dae 5542a3098ffSInki Dae /* the memory region mmaped with VM_PFNMAP. */ 5552a3098ffSInki Dae if (vma_is_io(vma)) { 5562a3098ffSInki Dae unsigned int i; 5572a3098ffSInki Dae 5582a3098ffSInki Dae for (i = 0; i < npages; ++i, start += PAGE_SIZE) { 5592a3098ffSInki Dae unsigned long pfn; 5602a3098ffSInki Dae int ret = follow_pfn(vma, start, &pfn); 5612a3098ffSInki Dae if (ret) 5622a3098ffSInki Dae return ret; 5632a3098ffSInki Dae 5642a3098ffSInki Dae pages[i] = pfn_to_page(pfn); 5652a3098ffSInki Dae } 5662a3098ffSInki Dae 5672a3098ffSInki Dae if (i != npages) { 5682a3098ffSInki Dae DRM_ERROR("failed to get user_pages.\n"); 5692a3098ffSInki Dae return -EINVAL; 5702a3098ffSInki Dae } 5712a3098ffSInki Dae 5722a3098ffSInki Dae return 0; 5732a3098ffSInki Dae } 5742a3098ffSInki Dae 5752a3098ffSInki Dae get_npages = get_user_pages(current, current->mm, start, 5762a3098ffSInki Dae npages, 1, 1, pages, NULL); 5772a3098ffSInki Dae get_npages = max(get_npages, 0); 5782a3098ffSInki Dae if (get_npages != npages) { 5792a3098ffSInki Dae DRM_ERROR("failed to get user_pages.\n"); 5802a3098ffSInki Dae while (get_npages) 5812a3098ffSInki Dae put_page(pages[--get_npages]); 5822a3098ffSInki Dae return -EFAULT; 5832a3098ffSInki Dae } 5842a3098ffSInki Dae 5852a3098ffSInki Dae return 0; 5862a3098ffSInki Dae } 5872a3098ffSInki Dae 5882a3098ffSInki Dae void exynos_gem_put_pages_to_userptr(struct page **pages, 5892a3098ffSInki Dae unsigned int npages, 5902a3098ffSInki Dae struct vm_area_struct *vma) 5912a3098ffSInki Dae { 5922a3098ffSInki Dae if (!vma_is_io(vma)) { 5932a3098ffSInki Dae unsigned int i; 5942a3098ffSInki Dae 5952a3098ffSInki Dae for (i = 0; i < npages; i++) { 5962a3098ffSInki Dae set_page_dirty_lock(pages[i]); 5972a3098ffSInki Dae 5982a3098ffSInki Dae /* 5992a3098ffSInki Dae * undo the reference we took when populating 6002a3098ffSInki Dae * the table. 6012a3098ffSInki Dae */ 6022a3098ffSInki Dae put_page(pages[i]); 6032a3098ffSInki Dae } 6042a3098ffSInki Dae } 6052a3098ffSInki Dae } 6062a3098ffSInki Dae 6072a3098ffSInki Dae int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, 6082a3098ffSInki Dae struct sg_table *sgt, 6092a3098ffSInki Dae enum dma_data_direction dir) 6102a3098ffSInki Dae { 6112a3098ffSInki Dae int nents; 6122a3098ffSInki Dae 6132a3098ffSInki Dae mutex_lock(&drm_dev->struct_mutex); 6142a3098ffSInki Dae 6152a3098ffSInki Dae nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 6162a3098ffSInki Dae if (!nents) { 6172a3098ffSInki Dae DRM_ERROR("failed to map sgl with dma.\n"); 6182a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 6192a3098ffSInki Dae return nents; 6202a3098ffSInki Dae } 6212a3098ffSInki Dae 6222a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 6232a3098ffSInki Dae return 0; 6242a3098ffSInki Dae } 6252a3098ffSInki Dae 6262a3098ffSInki Dae void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, 6272a3098ffSInki Dae struct sg_table *sgt, 6282a3098ffSInki Dae enum dma_data_direction dir) 6292a3098ffSInki Dae { 6302a3098ffSInki Dae dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 6312a3098ffSInki Dae } 6322a3098ffSInki Dae 6331c248b7dSInki Dae int exynos_drm_gem_init_object(struct drm_gem_object *obj) 6341c248b7dSInki Dae { 6351c248b7dSInki Dae return 0; 6361c248b7dSInki Dae } 6371c248b7dSInki Dae 638ee5e770eSJoonyoung Shim void exynos_drm_gem_free_object(struct drm_gem_object *obj) 6391c248b7dSInki Dae { 640b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 641b2df26c1SInki Dae struct exynos_drm_gem_buf *buf; 642b2df26c1SInki Dae 643b2df26c1SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 644b2df26c1SInki Dae buf = exynos_gem_obj->buffer; 645b2df26c1SInki Dae 646b2df26c1SInki Dae if (obj->import_attach) 647b2df26c1SInki Dae drm_prime_gem_destroy(obj, buf->sgt); 648b2df26c1SInki Dae 6492364839aSJoonyoung Shim exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); 6501c248b7dSInki Dae } 6511c248b7dSInki Dae 6521c248b7dSInki Dae int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 653ee5e770eSJoonyoung Shim struct drm_device *dev, 654ee5e770eSJoonyoung Shim struct drm_mode_create_dumb *args) 6551c248b7dSInki Dae { 6561c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 6572364839aSJoonyoung Shim int ret; 6581c248b7dSInki Dae 6591c248b7dSInki Dae /* 6601c248b7dSInki Dae * alocate memory to be used for framebuffer. 6611c248b7dSInki Dae * - this callback would be called by user application 6621c248b7dSInki Dae * with DRM_IOCTL_MODE_CREATE_DUMB command. 6631c248b7dSInki Dae */ 6641c248b7dSInki Dae 6653fd6b694SCooper Yuan args->pitch = args->width * ((args->bpp + 7) / 8); 6667da5907cSInki Dae args->size = args->pitch * args->height; 6671c248b7dSInki Dae 66869961d8fSInki Dae exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG | 66969961d8fSInki Dae EXYNOS_BO_WC, args->size); 6701c248b7dSInki Dae if (IS_ERR(exynos_gem_obj)) 6711c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 6721c248b7dSInki Dae 6732364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 6742364839aSJoonyoung Shim &args->handle); 6752364839aSJoonyoung Shim if (ret) { 6762364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 6772364839aSJoonyoung Shim return ret; 6782364839aSJoonyoung Shim } 6792364839aSJoonyoung Shim 6801c248b7dSInki Dae return 0; 6811c248b7dSInki Dae } 6821c248b7dSInki Dae 6831c248b7dSInki Dae int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 684ee5e770eSJoonyoung Shim struct drm_device *dev, uint32_t handle, 685ee5e770eSJoonyoung Shim uint64_t *offset) 6861c248b7dSInki Dae { 6871c248b7dSInki Dae struct drm_gem_object *obj; 6882d91cf17SJoonyoung Shim int ret = 0; 6891c248b7dSInki Dae 6901c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 6911c248b7dSInki Dae 6921c248b7dSInki Dae /* 6931c248b7dSInki Dae * get offset of memory allocated for drm framebuffer. 6941c248b7dSInki Dae * - this callback would be called by user application 6951c248b7dSInki Dae * with DRM_IOCTL_MODE_MAP_DUMB command. 6961c248b7dSInki Dae */ 6971c248b7dSInki Dae 6981c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, handle); 6991c248b7dSInki Dae if (!obj) { 7001c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 7012d91cf17SJoonyoung Shim ret = -EINVAL; 7022d91cf17SJoonyoung Shim goto unlock; 7031c248b7dSInki Dae } 7041c248b7dSInki Dae 7056037bafaSLaurent Pinchart if (!obj->map_list.map) { 7066037bafaSLaurent Pinchart ret = drm_gem_create_mmap_offset(obj); 7072d91cf17SJoonyoung Shim if (ret) 7082d91cf17SJoonyoung Shim goto out; 7092d91cf17SJoonyoung Shim } 7101c248b7dSInki Dae 7116037bafaSLaurent Pinchart *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; 7121c248b7dSInki Dae DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); 7131c248b7dSInki Dae 7142d91cf17SJoonyoung Shim out: 7152d91cf17SJoonyoung Shim drm_gem_object_unreference(obj); 7162d91cf17SJoonyoung Shim unlock: 7171c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 7182d91cf17SJoonyoung Shim return ret; 7191c248b7dSInki Dae } 7201c248b7dSInki Dae 721ee5e770eSJoonyoung Shim int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, 722ee5e770eSJoonyoung Shim struct drm_device *dev, 723ee5e770eSJoonyoung Shim unsigned int handle) 724ee5e770eSJoonyoung Shim { 725ee5e770eSJoonyoung Shim int ret; 726ee5e770eSJoonyoung Shim 727ee5e770eSJoonyoung Shim /* 728ee5e770eSJoonyoung Shim * obj->refcount and obj->handle_count are decreased and 729ee5e770eSJoonyoung Shim * if both them are 0 then exynos_drm_gem_free_object() 730ee5e770eSJoonyoung Shim * would be called by callback to release resources. 731ee5e770eSJoonyoung Shim */ 732ee5e770eSJoonyoung Shim ret = drm_gem_handle_delete(file_priv, handle); 733ee5e770eSJoonyoung Shim if (ret < 0) { 734ee5e770eSJoonyoung Shim DRM_ERROR("failed to delete drm_gem_handle.\n"); 735ee5e770eSJoonyoung Shim return ret; 736ee5e770eSJoonyoung Shim } 737ee5e770eSJoonyoung Shim 738ee5e770eSJoonyoung Shim return 0; 739ee5e770eSJoonyoung Shim } 740ee5e770eSJoonyoung Shim 7411c248b7dSInki Dae int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 7421c248b7dSInki Dae { 7431c248b7dSInki Dae struct drm_gem_object *obj = vma->vm_private_data; 7441c248b7dSInki Dae struct drm_device *dev = obj->dev; 7452b35892eSInki Dae unsigned long f_vaddr; 7461c248b7dSInki Dae pgoff_t page_offset; 7471c248b7dSInki Dae int ret; 7481c248b7dSInki Dae 7491c248b7dSInki Dae page_offset = ((unsigned long)vmf->virtual_address - 7501c248b7dSInki Dae vma->vm_start) >> PAGE_SHIFT; 7512b35892eSInki Dae f_vaddr = (unsigned long)vmf->virtual_address; 7521c248b7dSInki Dae 7531c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 7541c248b7dSInki Dae 7550519f9a1SInki Dae ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); 7562b35892eSInki Dae if (ret < 0) 7570519f9a1SInki Dae DRM_ERROR("failed to map a buffer with user.\n"); 7581c248b7dSInki Dae 7591c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 7601c248b7dSInki Dae 7611c248b7dSInki Dae return convert_to_vm_err_msg(ret); 7621c248b7dSInki Dae } 7631c248b7dSInki Dae 7641c248b7dSInki Dae int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 7651c248b7dSInki Dae { 766c01d73faSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 767c01d73faSInki Dae struct drm_gem_object *obj; 7681c248b7dSInki Dae int ret; 7691c248b7dSInki Dae 7701c248b7dSInki Dae /* set vm_area_struct. */ 7711c248b7dSInki Dae ret = drm_gem_mmap(filp, vma); 7721c248b7dSInki Dae if (ret < 0) { 7731c248b7dSInki Dae DRM_ERROR("failed to mmap.\n"); 7741c248b7dSInki Dae return ret; 7751c248b7dSInki Dae } 7761c248b7dSInki Dae 777c01d73faSInki Dae obj = vma->vm_private_data; 778c01d73faSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 779c01d73faSInki Dae 780c01d73faSInki Dae ret = check_gem_flags(exynos_gem_obj->flags); 781c01d73faSInki Dae if (ret) { 782c01d73faSInki Dae drm_gem_vm_close(vma); 783c01d73faSInki Dae drm_gem_free_mmap_offset(obj); 784c01d73faSInki Dae return ret; 785c01d73faSInki Dae } 786c01d73faSInki Dae 7871c248b7dSInki Dae vma->vm_flags &= ~VM_PFNMAP; 7881c248b7dSInki Dae vma->vm_flags |= VM_MIXEDMAP; 7891c248b7dSInki Dae 790c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 791c01d73faSInki Dae 7921c248b7dSInki Dae return ret; 7931c248b7dSInki Dae } 794