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> 130de23977SDavid Herrmann #include <drm/drm_vma_manager.h> 141c248b7dSInki Dae 152b35892eSInki Dae #include <linux/shmem_fs.h> 161c248b7dSInki Dae #include <drm/exynos_drm.h> 171c248b7dSInki Dae 181c248b7dSInki Dae #include "exynos_drm_drv.h" 191c248b7dSInki Dae #include "exynos_drm_gem.h" 201c248b7dSInki Dae #include "exynos_drm_buf.h" 213fec4532SVikas Sajjan #include "exynos_drm_iommu.h" 221c248b7dSInki Dae 231c248b7dSInki Dae static unsigned int convert_to_vm_err_msg(int msg) 241c248b7dSInki Dae { 251c248b7dSInki Dae unsigned int out_msg; 261c248b7dSInki Dae 271c248b7dSInki Dae switch (msg) { 281c248b7dSInki Dae case 0: 291c248b7dSInki Dae case -ERESTARTSYS: 301c248b7dSInki Dae case -EINTR: 311c248b7dSInki Dae out_msg = VM_FAULT_NOPAGE; 321c248b7dSInki Dae break; 331c248b7dSInki Dae 341c248b7dSInki Dae case -ENOMEM: 351c248b7dSInki Dae out_msg = VM_FAULT_OOM; 361c248b7dSInki Dae break; 371c248b7dSInki Dae 381c248b7dSInki Dae default: 391c248b7dSInki Dae out_msg = VM_FAULT_SIGBUS; 401c248b7dSInki Dae break; 411c248b7dSInki Dae } 421c248b7dSInki Dae 431c248b7dSInki Dae return out_msg; 441c248b7dSInki Dae } 451c248b7dSInki Dae 46dcf9af82SInki Dae static int check_gem_flags(unsigned int flags) 472b35892eSInki Dae { 48dcf9af82SInki Dae if (flags & ~(EXYNOS_BO_MASK)) { 49dcf9af82SInki Dae DRM_ERROR("invalid flags.\n"); 50dcf9af82SInki Dae return -EINVAL; 51dcf9af82SInki Dae } 52dcf9af82SInki Dae 53dcf9af82SInki Dae return 0; 54dcf9af82SInki Dae } 55dcf9af82SInki Dae 56c01d73faSInki Dae static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, 57c01d73faSInki Dae struct vm_area_struct *vma) 58c01d73faSInki Dae { 59c01d73faSInki Dae DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); 60c01d73faSInki Dae 61c01d73faSInki Dae /* non-cachable as default. */ 62c01d73faSInki Dae if (obj->flags & EXYNOS_BO_CACHABLE) 63c01d73faSInki Dae vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 64c01d73faSInki Dae else if (obj->flags & EXYNOS_BO_WC) 65c01d73faSInki Dae vma->vm_page_prot = 66c01d73faSInki Dae pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 67c01d73faSInki Dae else 68c01d73faSInki Dae vma->vm_page_prot = 69c01d73faSInki Dae pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 70c01d73faSInki Dae } 71c01d73faSInki Dae 72dcf9af82SInki Dae static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) 73dcf9af82SInki Dae { 740519f9a1SInki Dae /* TODO */ 750519f9a1SInki Dae 76dcf9af82SInki Dae return roundup(size, PAGE_SIZE); 772b35892eSInki Dae } 782b35892eSInki Dae 790519f9a1SInki Dae static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, 802b35892eSInki Dae struct vm_area_struct *vma, 812b35892eSInki Dae unsigned long f_vaddr, 822b35892eSInki Dae pgoff_t page_offset) 832b35892eSInki Dae { 842b35892eSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 852b35892eSInki Dae struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; 864ddc404bSRahul Sharma struct scatterlist *sgl; 872b35892eSInki Dae unsigned long pfn; 884ddc404bSRahul Sharma int i; 892b35892eSInki Dae 904ddc404bSRahul Sharma if (!buf->sgt) 914ddc404bSRahul Sharma return -EINTR; 924ddc404bSRahul Sharma 93465ed660SPrathyush K if (page_offset >= (buf->size >> PAGE_SHIFT)) { 94465ed660SPrathyush K DRM_ERROR("invalid page offset\n"); 95465ed660SPrathyush K return -EINVAL; 96465ed660SPrathyush K } 97465ed660SPrathyush K 984ddc404bSRahul Sharma sgl = buf->sgt->sgl; 994ddc404bSRahul Sharma for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { 1004ddc404bSRahul Sharma if (page_offset < (sgl->length >> PAGE_SHIFT)) 1014ddc404bSRahul Sharma break; 1024ddc404bSRahul Sharma page_offset -= (sgl->length >> PAGE_SHIFT); 1034ddc404bSRahul Sharma } 1044ddc404bSRahul Sharma 1054ddc404bSRahul Sharma pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; 1062b35892eSInki Dae 1072b35892eSInki Dae return vm_insert_mixed(vma, f_vaddr, pfn); 1082b35892eSInki Dae } 1092b35892eSInki Dae 1102364839aSJoonyoung Shim static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, 1112364839aSJoonyoung Shim struct drm_file *file_priv, 1122364839aSJoonyoung Shim unsigned int *handle) 1131c248b7dSInki Dae { 1141c248b7dSInki Dae int ret; 1151c248b7dSInki Dae 1161c248b7dSInki Dae /* 1171c248b7dSInki Dae * allocate a id of idr table where the obj is registered 1181c248b7dSInki Dae * and handle has the id what user can see. 1191c248b7dSInki Dae */ 1201c248b7dSInki Dae ret = drm_gem_handle_create(file_priv, obj, handle); 1211c248b7dSInki Dae if (ret) 1222364839aSJoonyoung Shim return ret; 1231c248b7dSInki Dae 1241c248b7dSInki Dae DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); 1251c248b7dSInki Dae 1261c248b7dSInki Dae /* drop reference from allocate - handle holds it now. */ 1271c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 1281c248b7dSInki Dae 1292364839aSJoonyoung Shim return 0; 1302364839aSJoonyoung Shim } 1311c248b7dSInki Dae 1322364839aSJoonyoung Shim void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) 1332364839aSJoonyoung Shim { 1342364839aSJoonyoung Shim struct drm_gem_object *obj; 135c01d73faSInki Dae struct exynos_drm_gem_buf *buf; 1362364839aSJoonyoung Shim 1372364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 138c01d73faSInki Dae buf = exynos_gem_obj->buffer; 1392364839aSJoonyoung Shim 140a8e11d1cSDaniel Vetter DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); 1412364839aSJoonyoung Shim 142c374e731SInki Dae /* 143c374e731SInki Dae * do not release memory region from exporter. 144c374e731SInki Dae * 145c374e731SInki Dae * the region will be released by exporter 146c374e731SInki Dae * once dmabuf's refcount becomes 0. 147c374e731SInki Dae */ 148c374e731SInki Dae if (obj->import_attach) 149c374e731SInki Dae goto out; 150c374e731SInki Dae 151c01d73faSInki Dae exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); 1522b35892eSInki Dae 153c374e731SInki Dae out: 154c01d73faSInki Dae exynos_drm_fini_buf(obj->dev, buf); 1552b35892eSInki Dae exynos_gem_obj->buffer = NULL; 1562364839aSJoonyoung Shim 1572364839aSJoonyoung Shim drm_gem_free_mmap_offset(obj); 1582364839aSJoonyoung Shim 1592364839aSJoonyoung Shim /* release file pointer to gem object. */ 1601c248b7dSInki Dae drm_gem_object_release(obj); 1611c248b7dSInki Dae 1621c248b7dSInki Dae kfree(exynos_gem_obj); 1632b35892eSInki Dae exynos_gem_obj = NULL; 1642364839aSJoonyoung Shim } 1652364839aSJoonyoung Shim 166a4f19aaaSInki Dae unsigned long exynos_drm_gem_get_size(struct drm_device *dev, 167a4f19aaaSInki Dae unsigned int gem_handle, 168a4f19aaaSInki Dae struct drm_file *file_priv) 169a4f19aaaSInki Dae { 170a4f19aaaSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 171a4f19aaaSInki Dae struct drm_gem_object *obj; 172a4f19aaaSInki Dae 173a4f19aaaSInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 174a4f19aaaSInki Dae if (!obj) { 175a4f19aaaSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 176a4f19aaaSInki Dae return 0; 177a4f19aaaSInki Dae } 178a4f19aaaSInki Dae 179a4f19aaaSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 180a4f19aaaSInki Dae 181a4f19aaaSInki Dae drm_gem_object_unreference_unlocked(obj); 182a4f19aaaSInki Dae 183a4f19aaaSInki Dae return exynos_gem_obj->buffer->size; 184a4f19aaaSInki Dae } 185a4f19aaaSInki Dae 186a4f19aaaSInki Dae 187b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, 1882364839aSJoonyoung Shim unsigned long size) 1892364839aSJoonyoung Shim { 1902364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 1912364839aSJoonyoung Shim struct drm_gem_object *obj; 1922364839aSJoonyoung Shim int ret; 1932364839aSJoonyoung Shim 1942364839aSJoonyoung Shim exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); 19538bb5253SSachin Kamat if (!exynos_gem_obj) 1962364839aSJoonyoung Shim return NULL; 1972364839aSJoonyoung Shim 1982b35892eSInki Dae exynos_gem_obj->size = size; 1992364839aSJoonyoung Shim obj = &exynos_gem_obj->base; 2002364839aSJoonyoung Shim 2012364839aSJoonyoung Shim ret = drm_gem_object_init(dev, obj, size); 2022364839aSJoonyoung Shim if (ret < 0) { 2032364839aSJoonyoung Shim DRM_ERROR("failed to initialize gem object\n"); 2042364839aSJoonyoung Shim kfree(exynos_gem_obj); 2052364839aSJoonyoung Shim return NULL; 2062364839aSJoonyoung Shim } 2072364839aSJoonyoung Shim 2082364839aSJoonyoung Shim DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); 2092364839aSJoonyoung Shim 2102364839aSJoonyoung Shim return exynos_gem_obj; 2111c248b7dSInki Dae } 2121c248b7dSInki Dae 213f088d5a9SInki Dae struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 2142b35892eSInki Dae unsigned int flags, 215ee5e770eSJoonyoung Shim unsigned long size) 216f088d5a9SInki Dae { 2172364839aSJoonyoung Shim struct exynos_drm_gem_obj *exynos_gem_obj; 2182b35892eSInki Dae struct exynos_drm_gem_buf *buf; 2192b35892eSInki Dae int ret; 220f088d5a9SInki Dae 221dcf9af82SInki Dae if (!size) { 222dcf9af82SInki Dae DRM_ERROR("invalid size.\n"); 223dcf9af82SInki Dae return ERR_PTR(-EINVAL); 224dcf9af82SInki Dae } 225f088d5a9SInki Dae 226dcf9af82SInki Dae size = roundup_gem_size(size, flags); 227dcf9af82SInki Dae 228dcf9af82SInki Dae ret = check_gem_flags(flags); 229dcf9af82SInki Dae if (ret) 230dcf9af82SInki Dae return ERR_PTR(ret); 2312b35892eSInki Dae 2322b35892eSInki Dae buf = exynos_drm_init_buf(dev, size); 2332b35892eSInki Dae if (!buf) 234ee5e770eSJoonyoung Shim return ERR_PTR(-ENOMEM); 235f088d5a9SInki Dae 2362364839aSJoonyoung Shim exynos_gem_obj = exynos_drm_gem_init(dev, size); 2372364839aSJoonyoung Shim if (!exynos_gem_obj) { 2382b35892eSInki Dae ret = -ENOMEM; 239dcf9af82SInki Dae goto err_fini_buf; 240f088d5a9SInki Dae } 241f088d5a9SInki Dae 2422b35892eSInki Dae exynos_gem_obj->buffer = buf; 2432b35892eSInki Dae 2442b35892eSInki Dae /* set memory type and cache attribute from user side. */ 2452b35892eSInki Dae exynos_gem_obj->flags = flags; 2462b35892eSInki Dae 2472b35892eSInki Dae ret = exynos_drm_alloc_buf(dev, buf, flags); 248c58c1599SYoungJun Cho if (ret < 0) 249c58c1599SYoungJun Cho goto err_gem_fini; 250f088d5a9SInki Dae 251f088d5a9SInki Dae return exynos_gem_obj; 252dcf9af82SInki Dae 253c58c1599SYoungJun Cho err_gem_fini: 254c58c1599SYoungJun Cho drm_gem_object_release(&exynos_gem_obj->base); 255c58c1599SYoungJun Cho kfree(exynos_gem_obj); 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 34196f54215SInki Dae int exynos_drm_gem_mmap_buffer(struct file *filp, 3421c248b7dSInki Dae struct vm_area_struct *vma) 3431c248b7dSInki Dae { 3441c248b7dSInki Dae struct drm_gem_object *obj = filp->private_data; 3451c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); 3465b07c660SInki Dae struct drm_device *drm_dev = obj->dev; 3472c871127SInki Dae struct exynos_drm_gem_buf *buffer; 3480519f9a1SInki Dae unsigned long vm_size; 3495b07c660SInki Dae int ret; 3501c248b7dSInki Dae 35196f54215SInki Dae WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 35296f54215SInki Dae 353314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; 3545b07c660SInki Dae vma->vm_private_data = obj; 3555b07c660SInki Dae vma->vm_ops = drm_dev->driver->gem_vm_ops; 3565b07c660SInki Dae 357c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 3581c248b7dSInki Dae 3590519f9a1SInki Dae vm_size = vma->vm_end - vma->vm_start; 3602b35892eSInki Dae 3611c248b7dSInki Dae /* 3622c871127SInki Dae * a buffer contains information to physically continuous memory 3631c248b7dSInki Dae * allocated by user request or at framebuffer creation. 3641c248b7dSInki Dae */ 3652c871127SInki Dae buffer = exynos_gem_obj->buffer; 3661c248b7dSInki Dae 3671c248b7dSInki Dae /* check if user-requested size is valid. */ 3682c871127SInki Dae if (vm_size > buffer->size) 3691c248b7dSInki Dae return -EINVAL; 3701c248b7dSInki Dae 3714744ad24SInki Dae ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, 3720519f9a1SInki Dae buffer->dma_addr, buffer->size, 3730519f9a1SInki Dae &buffer->dma_attrs); 3745b07c660SInki Dae if (ret < 0) { 3755b07c660SInki Dae DRM_ERROR("failed to mmap.\n"); 3765b07c660SInki Dae return ret; 3775b07c660SInki Dae } 3785b07c660SInki Dae 3795b07c660SInki Dae /* 3805b07c660SInki Dae * take a reference to this mapping of the object. And this reference 3815b07c660SInki Dae * is unreferenced by the corresponding vm_close call. 3825b07c660SInki Dae */ 3835b07c660SInki Dae drm_gem_object_reference(obj); 3845b07c660SInki Dae 3855b07c660SInki Dae drm_vm_open_locked(drm_dev, vma); 3865b07c660SInki Dae 3875b07c660SInki Dae return 0; 3881c248b7dSInki Dae } 3891c248b7dSInki Dae 3901c248b7dSInki Dae int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 3911c248b7dSInki Dae struct drm_file *file_priv) 3921c248b7dSInki Dae { 39396f54215SInki Dae struct drm_exynos_file_private *exynos_file_priv; 3941c248b7dSInki Dae struct drm_exynos_gem_mmap *args = data; 3951c248b7dSInki Dae struct drm_gem_object *obj; 39696f54215SInki Dae struct file *anon_filp; 39723f340e0SInki Dae unsigned long addr; 3981c248b7dSInki Dae 3991c248b7dSInki Dae if (!(dev->driver->driver_features & DRIVER_GEM)) { 4001c248b7dSInki Dae DRM_ERROR("does not support GEM.\n"); 4011c248b7dSInki Dae return -ENODEV; 4021c248b7dSInki Dae } 4031c248b7dSInki Dae 40496f54215SInki Dae mutex_lock(&dev->struct_mutex); 40596f54215SInki Dae 4061c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 4071c248b7dSInki Dae if (!obj) { 4081c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 40996f54215SInki Dae mutex_unlock(&dev->struct_mutex); 4101c248b7dSInki Dae return -EINVAL; 4111c248b7dSInki Dae } 4121c248b7dSInki Dae 41396f54215SInki Dae exynos_file_priv = file_priv->driver_priv; 41496f54215SInki Dae anon_filp = exynos_file_priv->anon_filp; 41596f54215SInki Dae anon_filp->private_data = obj; 4165af9f116SYoungJun Cho 41796f54215SInki Dae addr = vm_mmap(anon_filp, 0, args->size, PROT_READ | PROT_WRITE, 41896f54215SInki Dae MAP_SHARED, 0); 4191c248b7dSInki Dae 4205af9f116SYoungJun Cho drm_gem_object_unreference(obj); 4211c248b7dSInki Dae 42223f340e0SInki Dae if (IS_ERR_VALUE(addr)) { 4235af9f116SYoungJun Cho mutex_unlock(&dev->struct_mutex); 42423f340e0SInki Dae return (int)addr; 4255b07c660SInki Dae } 4261c248b7dSInki Dae 4275af9f116SYoungJun Cho mutex_unlock(&dev->struct_mutex); 4285af9f116SYoungJun Cho 4291c248b7dSInki Dae args->mapped = addr; 4301c248b7dSInki Dae 4311c248b7dSInki Dae DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); 4321c248b7dSInki Dae 4331c248b7dSInki Dae return 0; 4341c248b7dSInki Dae } 4351c248b7dSInki Dae 43640cd7e0cSInki Dae int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 43740cd7e0cSInki Dae struct drm_file *file_priv) 43840cd7e0cSInki Dae { struct exynos_drm_gem_obj *exynos_gem_obj; 43940cd7e0cSInki Dae struct drm_exynos_gem_info *args = data; 44040cd7e0cSInki Dae struct drm_gem_object *obj; 44140cd7e0cSInki Dae 44240cd7e0cSInki Dae mutex_lock(&dev->struct_mutex); 44340cd7e0cSInki Dae 44440cd7e0cSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 44540cd7e0cSInki Dae if (!obj) { 44640cd7e0cSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 44740cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 44840cd7e0cSInki Dae return -EINVAL; 44940cd7e0cSInki Dae } 45040cd7e0cSInki Dae 45140cd7e0cSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 45240cd7e0cSInki Dae 45340cd7e0cSInki Dae args->flags = exynos_gem_obj->flags; 45440cd7e0cSInki Dae args->size = exynos_gem_obj->size; 45540cd7e0cSInki Dae 45640cd7e0cSInki Dae drm_gem_object_unreference(obj); 45740cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 45840cd7e0cSInki Dae 45940cd7e0cSInki Dae return 0; 46040cd7e0cSInki Dae } 46140cd7e0cSInki Dae 4622a3098ffSInki Dae struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) 4632a3098ffSInki Dae { 4642a3098ffSInki Dae struct vm_area_struct *vma_copy; 4652a3098ffSInki Dae 4662a3098ffSInki Dae vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); 4672a3098ffSInki Dae if (!vma_copy) 4682a3098ffSInki Dae return NULL; 4692a3098ffSInki Dae 4702a3098ffSInki Dae if (vma->vm_ops && vma->vm_ops->open) 4712a3098ffSInki Dae vma->vm_ops->open(vma); 4722a3098ffSInki Dae 4732a3098ffSInki Dae if (vma->vm_file) 4742a3098ffSInki Dae get_file(vma->vm_file); 4752a3098ffSInki Dae 4762a3098ffSInki Dae memcpy(vma_copy, vma, sizeof(*vma)); 4772a3098ffSInki Dae 4782a3098ffSInki Dae vma_copy->vm_mm = NULL; 4792a3098ffSInki Dae vma_copy->vm_next = NULL; 4802a3098ffSInki Dae vma_copy->vm_prev = NULL; 4812a3098ffSInki Dae 4822a3098ffSInki Dae return vma_copy; 4832a3098ffSInki Dae } 4842a3098ffSInki Dae 4852a3098ffSInki Dae void exynos_gem_put_vma(struct vm_area_struct *vma) 4862a3098ffSInki Dae { 4872a3098ffSInki Dae if (!vma) 4882a3098ffSInki Dae return; 4892a3098ffSInki Dae 4902a3098ffSInki Dae if (vma->vm_ops && vma->vm_ops->close) 4912a3098ffSInki Dae vma->vm_ops->close(vma); 4922a3098ffSInki Dae 4932a3098ffSInki Dae if (vma->vm_file) 4942a3098ffSInki Dae fput(vma->vm_file); 4952a3098ffSInki Dae 4962a3098ffSInki Dae kfree(vma); 4972a3098ffSInki Dae } 4982a3098ffSInki Dae 4992a3098ffSInki Dae int exynos_gem_get_pages_from_userptr(unsigned long start, 5002a3098ffSInki Dae unsigned int npages, 5012a3098ffSInki Dae struct page **pages, 5022a3098ffSInki Dae struct vm_area_struct *vma) 5032a3098ffSInki Dae { 5042a3098ffSInki Dae int get_npages; 5052a3098ffSInki Dae 5062a3098ffSInki Dae /* the memory region mmaped with VM_PFNMAP. */ 5072a3098ffSInki Dae if (vma_is_io(vma)) { 5082a3098ffSInki Dae unsigned int i; 5092a3098ffSInki Dae 5102a3098ffSInki Dae for (i = 0; i < npages; ++i, start += PAGE_SIZE) { 5112a3098ffSInki Dae unsigned long pfn; 5122a3098ffSInki Dae int ret = follow_pfn(vma, start, &pfn); 5132a3098ffSInki Dae if (ret) 5142a3098ffSInki Dae return ret; 5152a3098ffSInki Dae 5162a3098ffSInki Dae pages[i] = pfn_to_page(pfn); 5172a3098ffSInki Dae } 5182a3098ffSInki Dae 5192a3098ffSInki Dae if (i != npages) { 5202a3098ffSInki Dae DRM_ERROR("failed to get user_pages.\n"); 5212a3098ffSInki Dae return -EINVAL; 5222a3098ffSInki Dae } 5232a3098ffSInki Dae 5242a3098ffSInki Dae return 0; 5252a3098ffSInki Dae } 5262a3098ffSInki Dae 5272a3098ffSInki Dae get_npages = get_user_pages(current, current->mm, start, 5282a3098ffSInki Dae npages, 1, 1, pages, NULL); 5292a3098ffSInki Dae get_npages = max(get_npages, 0); 5302a3098ffSInki Dae if (get_npages != npages) { 5312a3098ffSInki Dae DRM_ERROR("failed to get user_pages.\n"); 5322a3098ffSInki Dae while (get_npages) 5332a3098ffSInki Dae put_page(pages[--get_npages]); 5342a3098ffSInki Dae return -EFAULT; 5352a3098ffSInki Dae } 5362a3098ffSInki Dae 5372a3098ffSInki Dae return 0; 5382a3098ffSInki Dae } 5392a3098ffSInki Dae 5402a3098ffSInki Dae void exynos_gem_put_pages_to_userptr(struct page **pages, 5412a3098ffSInki Dae unsigned int npages, 5422a3098ffSInki Dae struct vm_area_struct *vma) 5432a3098ffSInki Dae { 5442a3098ffSInki Dae if (!vma_is_io(vma)) { 5452a3098ffSInki Dae unsigned int i; 5462a3098ffSInki Dae 5472a3098ffSInki Dae for (i = 0; i < npages; i++) { 5482a3098ffSInki Dae set_page_dirty_lock(pages[i]); 5492a3098ffSInki Dae 5502a3098ffSInki Dae /* 5512a3098ffSInki Dae * undo the reference we took when populating 5522a3098ffSInki Dae * the table. 5532a3098ffSInki Dae */ 5542a3098ffSInki Dae put_page(pages[i]); 5552a3098ffSInki Dae } 5562a3098ffSInki Dae } 5572a3098ffSInki Dae } 5582a3098ffSInki Dae 5592a3098ffSInki Dae int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, 5602a3098ffSInki Dae struct sg_table *sgt, 5612a3098ffSInki Dae enum dma_data_direction dir) 5622a3098ffSInki Dae { 5632a3098ffSInki Dae int nents; 5642a3098ffSInki Dae 5652a3098ffSInki Dae mutex_lock(&drm_dev->struct_mutex); 5662a3098ffSInki Dae 5672a3098ffSInki Dae nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 5682a3098ffSInki Dae if (!nents) { 5692a3098ffSInki Dae DRM_ERROR("failed to map sgl with dma.\n"); 5702a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 5712a3098ffSInki Dae return nents; 5722a3098ffSInki Dae } 5732a3098ffSInki Dae 5742a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 5752a3098ffSInki Dae return 0; 5762a3098ffSInki Dae } 5772a3098ffSInki Dae 5782a3098ffSInki Dae void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, 5792a3098ffSInki Dae struct sg_table *sgt, 5802a3098ffSInki Dae enum dma_data_direction dir) 5812a3098ffSInki Dae { 5822a3098ffSInki Dae dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 5832a3098ffSInki Dae } 5842a3098ffSInki Dae 585ee5e770eSJoonyoung Shim void exynos_drm_gem_free_object(struct drm_gem_object *obj) 5861c248b7dSInki Dae { 587b2df26c1SInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 588b2df26c1SInki Dae struct exynos_drm_gem_buf *buf; 589b2df26c1SInki Dae 590b2df26c1SInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 591b2df26c1SInki Dae buf = exynos_gem_obj->buffer; 592b2df26c1SInki Dae 593b2df26c1SInki Dae if (obj->import_attach) 594b2df26c1SInki Dae drm_prime_gem_destroy(obj, buf->sgt); 595b2df26c1SInki Dae 5962364839aSJoonyoung Shim exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); 5971c248b7dSInki Dae } 5981c248b7dSInki Dae 5991c248b7dSInki Dae int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 600ee5e770eSJoonyoung Shim struct drm_device *dev, 601ee5e770eSJoonyoung Shim struct drm_mode_create_dumb *args) 6021c248b7dSInki Dae { 6031c248b7dSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 6042364839aSJoonyoung Shim int ret; 6051c248b7dSInki Dae 6061c248b7dSInki Dae /* 607c6b78bc8SMasanari Iida * allocate memory to be used for framebuffer. 6081c248b7dSInki Dae * - this callback would be called by user application 6091c248b7dSInki Dae * with DRM_IOCTL_MODE_CREATE_DUMB command. 6101c248b7dSInki Dae */ 6111c248b7dSInki Dae 6123fd6b694SCooper Yuan args->pitch = args->width * ((args->bpp + 7) / 8); 6137da5907cSInki Dae args->size = args->pitch * args->height; 6141c248b7dSInki Dae 615122beea8SRahul Sharma if (is_drm_iommu_supported(dev)) { 6163fec4532SVikas Sajjan exynos_gem_obj = exynos_drm_gem_create(dev, 6173fec4532SVikas Sajjan EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC, 6183fec4532SVikas Sajjan args->size); 619122beea8SRahul Sharma } else { 620122beea8SRahul Sharma exynos_gem_obj = exynos_drm_gem_create(dev, 621122beea8SRahul Sharma EXYNOS_BO_CONTIG | EXYNOS_BO_WC, 622122beea8SRahul Sharma args->size); 6233fec4532SVikas Sajjan } 6243fec4532SVikas Sajjan 625122beea8SRahul Sharma if (IS_ERR(exynos_gem_obj)) { 626122beea8SRahul Sharma dev_warn(dev->dev, "FB allocation failed.\n"); 6271c248b7dSInki Dae return PTR_ERR(exynos_gem_obj); 628122beea8SRahul Sharma } 6291c248b7dSInki Dae 6302364839aSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, 6312364839aSJoonyoung Shim &args->handle); 6322364839aSJoonyoung Shim if (ret) { 6332364839aSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem_obj); 6342364839aSJoonyoung Shim return ret; 6352364839aSJoonyoung Shim } 6362364839aSJoonyoung Shim 6371c248b7dSInki Dae return 0; 6381c248b7dSInki Dae } 6391c248b7dSInki Dae 6401c248b7dSInki Dae int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 641ee5e770eSJoonyoung Shim struct drm_device *dev, uint32_t handle, 642ee5e770eSJoonyoung Shim uint64_t *offset) 6431c248b7dSInki Dae { 6441c248b7dSInki Dae struct drm_gem_object *obj; 6452d91cf17SJoonyoung Shim int ret = 0; 6461c248b7dSInki Dae 6471c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 6481c248b7dSInki Dae 6491c248b7dSInki Dae /* 6501c248b7dSInki Dae * get offset of memory allocated for drm framebuffer. 6511c248b7dSInki Dae * - this callback would be called by user application 6521c248b7dSInki Dae * with DRM_IOCTL_MODE_MAP_DUMB command. 6531c248b7dSInki Dae */ 6541c248b7dSInki Dae 6551c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, handle); 6561c248b7dSInki Dae if (!obj) { 6571c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 6582d91cf17SJoonyoung Shim ret = -EINVAL; 6592d91cf17SJoonyoung Shim goto unlock; 6601c248b7dSInki Dae } 6611c248b7dSInki Dae 6626037bafaSLaurent Pinchart ret = drm_gem_create_mmap_offset(obj); 6632d91cf17SJoonyoung Shim if (ret) 6642d91cf17SJoonyoung Shim goto out; 6651c248b7dSInki Dae 6660de23977SDavid Herrmann *offset = drm_vma_node_offset_addr(&obj->vma_node); 6671c248b7dSInki Dae DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); 6681c248b7dSInki Dae 6692d91cf17SJoonyoung Shim out: 6702d91cf17SJoonyoung Shim drm_gem_object_unreference(obj); 6712d91cf17SJoonyoung Shim unlock: 6721c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 6732d91cf17SJoonyoung Shim return ret; 6741c248b7dSInki Dae } 6751c248b7dSInki Dae 6761c248b7dSInki Dae int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 6771c248b7dSInki Dae { 6781c248b7dSInki Dae struct drm_gem_object *obj = vma->vm_private_data; 6791c248b7dSInki Dae struct drm_device *dev = obj->dev; 6802b35892eSInki Dae unsigned long f_vaddr; 6811c248b7dSInki Dae pgoff_t page_offset; 6821c248b7dSInki Dae int ret; 6831c248b7dSInki Dae 6841c248b7dSInki Dae page_offset = ((unsigned long)vmf->virtual_address - 6851c248b7dSInki Dae vma->vm_start) >> PAGE_SHIFT; 6862b35892eSInki Dae f_vaddr = (unsigned long)vmf->virtual_address; 6871c248b7dSInki Dae 6881c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 6891c248b7dSInki Dae 6900519f9a1SInki Dae ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); 6912b35892eSInki Dae if (ret < 0) 6920519f9a1SInki Dae DRM_ERROR("failed to map a buffer with user.\n"); 6931c248b7dSInki Dae 6941c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 6951c248b7dSInki Dae 6961c248b7dSInki Dae return convert_to_vm_err_msg(ret); 6971c248b7dSInki Dae } 6981c248b7dSInki Dae 6991c248b7dSInki Dae int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 7001c248b7dSInki Dae { 701c01d73faSInki Dae struct exynos_drm_gem_obj *exynos_gem_obj; 702c01d73faSInki Dae struct drm_gem_object *obj; 7031c248b7dSInki Dae int ret; 7041c248b7dSInki Dae 7051c248b7dSInki Dae /* set vm_area_struct. */ 7061c248b7dSInki Dae ret = drm_gem_mmap(filp, vma); 7071c248b7dSInki Dae if (ret < 0) { 7081c248b7dSInki Dae DRM_ERROR("failed to mmap.\n"); 7091c248b7dSInki Dae return ret; 7101c248b7dSInki Dae } 7111c248b7dSInki Dae 712c01d73faSInki Dae obj = vma->vm_private_data; 713c01d73faSInki Dae exynos_gem_obj = to_exynos_gem_obj(obj); 714c01d73faSInki Dae 715c01d73faSInki Dae ret = check_gem_flags(exynos_gem_obj->flags); 716c01d73faSInki Dae if (ret) { 717c01d73faSInki Dae drm_gem_vm_close(vma); 718c01d73faSInki Dae drm_gem_free_mmap_offset(obj); 719c01d73faSInki Dae return ret; 720c01d73faSInki Dae } 721c01d73faSInki Dae 7221c248b7dSInki Dae vma->vm_flags &= ~VM_PFNMAP; 7231c248b7dSInki Dae vma->vm_flags |= VM_MIXEDMAP; 7241c248b7dSInki Dae 725c01d73faSInki Dae update_vm_cache_attr(exynos_gem_obj, vma); 726c01d73faSInki Dae 7271c248b7dSInki Dae return ret; 7281c248b7dSInki Dae } 729