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> 1601ed50ddSJoonyoung Shim #include <linux/dma-buf.h> 171c248b7dSInki Dae #include <drm/exynos_drm.h> 181c248b7dSInki Dae 191c248b7dSInki Dae #include "exynos_drm_drv.h" 201c248b7dSInki Dae #include "exynos_drm_gem.h" 213fec4532SVikas Sajjan #include "exynos_drm_iommu.h" 221c248b7dSInki Dae 23813fd67bSJoonyoung Shim static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) 242a8cb489SJoonyoung Shim { 25813fd67bSJoonyoung Shim struct drm_device *dev = exynos_gem->base.dev; 262a8cb489SJoonyoung Shim enum dma_attr attr; 272a8cb489SJoonyoung Shim unsigned int nr_pages; 282a8cb489SJoonyoung Shim 29813fd67bSJoonyoung Shim if (exynos_gem->dma_addr) { 302a8cb489SJoonyoung Shim DRM_DEBUG_KMS("already allocated.\n"); 312a8cb489SJoonyoung Shim return 0; 322a8cb489SJoonyoung Shim } 332a8cb489SJoonyoung Shim 34813fd67bSJoonyoung Shim init_dma_attrs(&exynos_gem->dma_attrs); 352a8cb489SJoonyoung Shim 362a8cb489SJoonyoung Shim /* 372a8cb489SJoonyoung Shim * if EXYNOS_BO_CONTIG, fully physically contiguous memory 382a8cb489SJoonyoung Shim * region will be allocated else physically contiguous 392a8cb489SJoonyoung Shim * as possible. 402a8cb489SJoonyoung Shim */ 41813fd67bSJoonyoung Shim if (!(exynos_gem->flags & EXYNOS_BO_NONCONTIG)) 42813fd67bSJoonyoung Shim dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &exynos_gem->dma_attrs); 432a8cb489SJoonyoung Shim 442a8cb489SJoonyoung Shim /* 452a8cb489SJoonyoung Shim * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping 462a8cb489SJoonyoung Shim * else cachable mapping. 472a8cb489SJoonyoung Shim */ 48813fd67bSJoonyoung Shim if (exynos_gem->flags & EXYNOS_BO_WC || 49813fd67bSJoonyoung Shim !(exynos_gem->flags & EXYNOS_BO_CACHABLE)) 502a8cb489SJoonyoung Shim attr = DMA_ATTR_WRITE_COMBINE; 512a8cb489SJoonyoung Shim else 522a8cb489SJoonyoung Shim attr = DMA_ATTR_NON_CONSISTENT; 532a8cb489SJoonyoung Shim 54813fd67bSJoonyoung Shim dma_set_attr(attr, &exynos_gem->dma_attrs); 55813fd67bSJoonyoung Shim dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &exynos_gem->dma_attrs); 562a8cb489SJoonyoung Shim 57813fd67bSJoonyoung Shim nr_pages = exynos_gem->size >> PAGE_SHIFT; 582a8cb489SJoonyoung Shim 592a8cb489SJoonyoung Shim if (!is_drm_iommu_supported(dev)) { 60813fd67bSJoonyoung Shim exynos_gem->pages = drm_calloc_large(nr_pages, 61813fd67bSJoonyoung Shim sizeof(struct page *)); 62813fd67bSJoonyoung Shim if (!exynos_gem->pages) { 632a8cb489SJoonyoung Shim DRM_ERROR("failed to allocate pages.\n"); 642a8cb489SJoonyoung Shim return -ENOMEM; 652a8cb489SJoonyoung Shim } 66333e8e58SJoonyoung Shim } 672a8cb489SJoonyoung Shim 68813fd67bSJoonyoung Shim exynos_gem->cookie = dma_alloc_attrs(dev->dev, exynos_gem->size, 69813fd67bSJoonyoung Shim &exynos_gem->dma_addr, GFP_KERNEL, 70813fd67bSJoonyoung Shim &exynos_gem->dma_attrs); 71813fd67bSJoonyoung Shim if (!exynos_gem->cookie) { 722a8cb489SJoonyoung Shim DRM_ERROR("failed to allocate buffer.\n"); 73813fd67bSJoonyoung Shim if (exynos_gem->pages) 74813fd67bSJoonyoung Shim drm_free_large(exynos_gem->pages); 752a8cb489SJoonyoung Shim return -ENOMEM; 762a8cb489SJoonyoung Shim } 772a8cb489SJoonyoung Shim 78813fd67bSJoonyoung Shim if (exynos_gem->pages) { 79333e8e58SJoonyoung Shim dma_addr_t start_addr; 80333e8e58SJoonyoung Shim unsigned int i = 0; 81333e8e58SJoonyoung Shim 82813fd67bSJoonyoung Shim start_addr = exynos_gem->dma_addr; 832a8cb489SJoonyoung Shim while (i < nr_pages) { 84813fd67bSJoonyoung Shim exynos_gem->pages[i] = 85813fd67bSJoonyoung Shim pfn_to_page(dma_to_pfn(dev->dev, start_addr)); 862a8cb489SJoonyoung Shim start_addr += PAGE_SIZE; 872a8cb489SJoonyoung Shim i++; 882a8cb489SJoonyoung Shim } 892a8cb489SJoonyoung Shim } else { 90813fd67bSJoonyoung Shim exynos_gem->pages = exynos_gem->cookie; 912a8cb489SJoonyoung Shim } 922a8cb489SJoonyoung Shim 932a8cb489SJoonyoung Shim DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", 94813fd67bSJoonyoung Shim (unsigned long)exynos_gem->dma_addr, exynos_gem->size); 952a8cb489SJoonyoung Shim 962a8cb489SJoonyoung Shim return 0; 972a8cb489SJoonyoung Shim } 982a8cb489SJoonyoung Shim 99813fd67bSJoonyoung Shim static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem) 1002a8cb489SJoonyoung Shim { 101813fd67bSJoonyoung Shim struct drm_device *dev = exynos_gem->base.dev; 1022a8cb489SJoonyoung Shim 103813fd67bSJoonyoung Shim if (!exynos_gem->dma_addr) { 1042a8cb489SJoonyoung Shim DRM_DEBUG_KMS("dma_addr is invalid.\n"); 1052a8cb489SJoonyoung Shim return; 1062a8cb489SJoonyoung Shim } 1072a8cb489SJoonyoung Shim 1082a8cb489SJoonyoung Shim DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", 109813fd67bSJoonyoung Shim (unsigned long)exynos_gem->dma_addr, exynos_gem->size); 1102a8cb489SJoonyoung Shim 111813fd67bSJoonyoung Shim dma_free_attrs(dev->dev, exynos_gem->size, exynos_gem->cookie, 112813fd67bSJoonyoung Shim (dma_addr_t)exynos_gem->dma_addr, 113813fd67bSJoonyoung Shim &exynos_gem->dma_attrs); 114333e8e58SJoonyoung Shim 115333e8e58SJoonyoung Shim if (!is_drm_iommu_supported(dev)) 116813fd67bSJoonyoung Shim drm_free_large(exynos_gem->pages); 1172a8cb489SJoonyoung Shim } 1182a8cb489SJoonyoung Shim 1192364839aSJoonyoung Shim static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, 1202364839aSJoonyoung Shim struct drm_file *file_priv, 1212364839aSJoonyoung Shim unsigned int *handle) 1221c248b7dSInki Dae { 1231c248b7dSInki Dae int ret; 1241c248b7dSInki Dae 1251c248b7dSInki Dae /* 1261c248b7dSInki Dae * allocate a id of idr table where the obj is registered 1271c248b7dSInki Dae * and handle has the id what user can see. 1281c248b7dSInki Dae */ 1291c248b7dSInki Dae ret = drm_gem_handle_create(file_priv, obj, handle); 1301c248b7dSInki Dae if (ret) 1312364839aSJoonyoung Shim return ret; 1321c248b7dSInki Dae 1331c248b7dSInki Dae DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); 1341c248b7dSInki Dae 1351c248b7dSInki Dae /* drop reference from allocate - handle holds it now. */ 1361c248b7dSInki Dae drm_gem_object_unreference_unlocked(obj); 1371c248b7dSInki Dae 1382364839aSJoonyoung Shim return 0; 1392364839aSJoonyoung Shim } 1401c248b7dSInki Dae 141813fd67bSJoonyoung Shim void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem) 1422364839aSJoonyoung Shim { 143813fd67bSJoonyoung Shim struct drm_gem_object *obj = &exynos_gem->base; 1442364839aSJoonyoung Shim 145a8e11d1cSDaniel Vetter DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); 1462364839aSJoonyoung Shim 147c374e731SInki Dae /* 148c374e731SInki Dae * do not release memory region from exporter. 149c374e731SInki Dae * 150c374e731SInki Dae * the region will be released by exporter 151c374e731SInki Dae * once dmabuf's refcount becomes 0. 152c374e731SInki Dae */ 153c374e731SInki Dae if (obj->import_attach) 154813fd67bSJoonyoung Shim drm_prime_gem_destroy(obj, exynos_gem->sgt); 1557c93537aSJoonyoung Shim else 156813fd67bSJoonyoung Shim exynos_drm_free_buf(exynos_gem); 1572b35892eSInki Dae 1582364839aSJoonyoung Shim /* release file pointer to gem object. */ 1591c248b7dSInki Dae drm_gem_object_release(obj); 1601c248b7dSInki Dae 161813fd67bSJoonyoung Shim kfree(exynos_gem); 1622364839aSJoonyoung Shim } 1632364839aSJoonyoung Shim 164a4f19aaaSInki Dae unsigned long exynos_drm_gem_get_size(struct drm_device *dev, 165a4f19aaaSInki Dae unsigned int gem_handle, 166a4f19aaaSInki Dae struct drm_file *file_priv) 167a4f19aaaSInki Dae { 168813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 169a4f19aaaSInki Dae struct drm_gem_object *obj; 170a4f19aaaSInki Dae 171a4f19aaaSInki Dae obj = drm_gem_object_lookup(dev, file_priv, gem_handle); 172a4f19aaaSInki Dae if (!obj) { 173a4f19aaaSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 174a4f19aaaSInki Dae return 0; 175a4f19aaaSInki Dae } 176a4f19aaaSInki Dae 177813fd67bSJoonyoung Shim exynos_gem = to_exynos_gem(obj); 178a4f19aaaSInki Dae 179a4f19aaaSInki Dae drm_gem_object_unreference_unlocked(obj); 180a4f19aaaSInki Dae 181813fd67bSJoonyoung Shim return exynos_gem->size; 182a4f19aaaSInki Dae } 183a4f19aaaSInki Dae 184813fd67bSJoonyoung Shim static struct exynos_drm_gem *exynos_drm_gem_init(struct drm_device *dev, 1852364839aSJoonyoung Shim unsigned long size) 1862364839aSJoonyoung Shim { 187813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 1882364839aSJoonyoung Shim struct drm_gem_object *obj; 1892364839aSJoonyoung Shim int ret; 1902364839aSJoonyoung Shim 191813fd67bSJoonyoung Shim exynos_gem = kzalloc(sizeof(*exynos_gem), GFP_KERNEL); 192813fd67bSJoonyoung Shim if (!exynos_gem) 1935f3f4266SJoonyoung Shim return ERR_PTR(-ENOMEM); 1942364839aSJoonyoung Shim 195813fd67bSJoonyoung Shim exynos_gem->size = size; 196813fd67bSJoonyoung Shim obj = &exynos_gem->base; 1972364839aSJoonyoung Shim 1982364839aSJoonyoung Shim ret = drm_gem_object_init(dev, obj, size); 1992364839aSJoonyoung Shim if (ret < 0) { 2002364839aSJoonyoung Shim DRM_ERROR("failed to initialize gem object\n"); 201813fd67bSJoonyoung Shim kfree(exynos_gem); 2025f3f4266SJoonyoung Shim return ERR_PTR(ret); 2032364839aSJoonyoung Shim } 2042364839aSJoonyoung Shim 20548cf53f4SJoonyoung Shim ret = drm_gem_create_mmap_offset(obj); 20648cf53f4SJoonyoung Shim if (ret < 0) { 20748cf53f4SJoonyoung Shim drm_gem_object_release(obj); 208813fd67bSJoonyoung Shim kfree(exynos_gem); 20948cf53f4SJoonyoung Shim return ERR_PTR(ret); 21048cf53f4SJoonyoung Shim } 21148cf53f4SJoonyoung Shim 2122364839aSJoonyoung Shim DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); 2132364839aSJoonyoung Shim 214813fd67bSJoonyoung Shim return exynos_gem; 2151c248b7dSInki Dae } 2161c248b7dSInki Dae 217813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, 2182b35892eSInki Dae unsigned int flags, 219ee5e770eSJoonyoung Shim unsigned long size) 220f088d5a9SInki Dae { 221813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 2222b35892eSInki Dae int ret; 223f088d5a9SInki Dae 224c4130bcdSJoonyoung Shim if (flags & ~(EXYNOS_BO_MASK)) { 225c4130bcdSJoonyoung Shim DRM_ERROR("invalid flags.\n"); 226c4130bcdSJoonyoung Shim return ERR_PTR(-EINVAL); 227c4130bcdSJoonyoung Shim } 228c4130bcdSJoonyoung Shim 229dcf9af82SInki Dae if (!size) { 230dcf9af82SInki Dae DRM_ERROR("invalid size.\n"); 231dcf9af82SInki Dae return ERR_PTR(-EINVAL); 232dcf9af82SInki Dae } 233f088d5a9SInki Dae 234eb57da88SJoonyoung Shim size = roundup(size, PAGE_SIZE); 235dcf9af82SInki Dae 236813fd67bSJoonyoung Shim exynos_gem = exynos_drm_gem_init(dev, size); 237813fd67bSJoonyoung Shim if (IS_ERR(exynos_gem)) 238813fd67bSJoonyoung Shim return exynos_gem; 2392b35892eSInki Dae 2402b35892eSInki Dae /* set memory type and cache attribute from user side. */ 241813fd67bSJoonyoung Shim exynos_gem->flags = flags; 2422b35892eSInki Dae 243813fd67bSJoonyoung Shim ret = exynos_drm_alloc_buf(exynos_gem); 2442a8cb489SJoonyoung Shim if (ret < 0) { 245813fd67bSJoonyoung Shim drm_gem_object_release(&exynos_gem->base); 246813fd67bSJoonyoung Shim kfree(exynos_gem); 2472b35892eSInki Dae return ERR_PTR(ret); 248f088d5a9SInki Dae } 249f088d5a9SInki Dae 250813fd67bSJoonyoung Shim return exynos_gem; 2512a8cb489SJoonyoung Shim } 2522a8cb489SJoonyoung Shim 2531c248b7dSInki Dae int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 2541c248b7dSInki Dae struct drm_file *file_priv) 2551c248b7dSInki Dae { 2561c248b7dSInki Dae struct drm_exynos_gem_create *args = data; 257813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 2582364839aSJoonyoung Shim int ret; 2591c248b7dSInki Dae 260813fd67bSJoonyoung Shim exynos_gem = exynos_drm_gem_create(dev, args->flags, args->size); 261813fd67bSJoonyoung Shim if (IS_ERR(exynos_gem)) 262813fd67bSJoonyoung Shim return PTR_ERR(exynos_gem); 2631c248b7dSInki Dae 264813fd67bSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, 2652364839aSJoonyoung Shim &args->handle); 2662364839aSJoonyoung Shim if (ret) { 267813fd67bSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem); 2682364839aSJoonyoung Shim return ret; 2692364839aSJoonyoung Shim } 2702364839aSJoonyoung Shim 2711c248b7dSInki Dae return 0; 2721c248b7dSInki Dae } 2731c248b7dSInki Dae 274d87342c1SInki Dae dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, 275f0b1bda7SInki Dae unsigned int gem_handle, 276d87342c1SInki Dae struct drm_file *filp) 277f0b1bda7SInki Dae { 278813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 279f0b1bda7SInki Dae struct drm_gem_object *obj; 280f0b1bda7SInki Dae 281d87342c1SInki Dae obj = drm_gem_object_lookup(dev, filp, gem_handle); 282f0b1bda7SInki Dae if (!obj) { 283f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 284f0b1bda7SInki Dae return ERR_PTR(-EINVAL); 285f0b1bda7SInki Dae } 286f0b1bda7SInki Dae 287813fd67bSJoonyoung Shim exynos_gem = to_exynos_gem(obj); 288f0b1bda7SInki Dae 289813fd67bSJoonyoung Shim return &exynos_gem->dma_addr; 290f0b1bda7SInki Dae } 291f0b1bda7SInki Dae 292f0b1bda7SInki Dae void exynos_drm_gem_put_dma_addr(struct drm_device *dev, 293f0b1bda7SInki Dae unsigned int gem_handle, 294d87342c1SInki Dae struct drm_file *filp) 295f0b1bda7SInki Dae { 296f0b1bda7SInki Dae struct drm_gem_object *obj; 297f0b1bda7SInki Dae 298d87342c1SInki Dae obj = drm_gem_object_lookup(dev, filp, gem_handle); 299f0b1bda7SInki Dae if (!obj) { 300f0b1bda7SInki Dae DRM_ERROR("failed to lookup gem object.\n"); 301f0b1bda7SInki Dae return; 302f0b1bda7SInki Dae } 303f0b1bda7SInki Dae 304f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 305f0b1bda7SInki Dae 306f0b1bda7SInki Dae /* 307f0b1bda7SInki Dae * decrease obj->refcount one more time because we has already 308f0b1bda7SInki Dae * increased it at exynos_drm_gem_get_dma_addr(). 309f0b1bda7SInki Dae */ 310f0b1bda7SInki Dae drm_gem_object_unreference_unlocked(obj); 311f0b1bda7SInki Dae } 312f0b1bda7SInki Dae 313813fd67bSJoonyoung Shim static int exynos_drm_gem_mmap_buffer(struct exynos_drm_gem *exynos_gem, 3141c248b7dSInki Dae struct vm_area_struct *vma) 3151c248b7dSInki Dae { 316813fd67bSJoonyoung Shim struct drm_device *drm_dev = exynos_gem->base.dev; 3170519f9a1SInki Dae unsigned long vm_size; 3185b07c660SInki Dae int ret; 3191c248b7dSInki Dae 320832316c7SInki Dae vma->vm_flags &= ~VM_PFNMAP; 321832316c7SInki Dae vma->vm_pgoff = 0; 3221c248b7dSInki Dae 3230519f9a1SInki Dae vm_size = vma->vm_end - vma->vm_start; 3242b35892eSInki Dae 3251c248b7dSInki Dae /* check if user-requested size is valid. */ 326813fd67bSJoonyoung Shim if (vm_size > exynos_gem->size) 3271c248b7dSInki Dae return -EINVAL; 3281c248b7dSInki Dae 329813fd67bSJoonyoung Shim ret = dma_mmap_attrs(drm_dev->dev, vma, exynos_gem->pages, 330813fd67bSJoonyoung Shim exynos_gem->dma_addr, exynos_gem->size, 331813fd67bSJoonyoung Shim &exynos_gem->dma_attrs); 3325b07c660SInki Dae if (ret < 0) { 3335b07c660SInki Dae DRM_ERROR("failed to mmap.\n"); 3345b07c660SInki Dae return ret; 3355b07c660SInki Dae } 3365b07c660SInki Dae 3371c248b7dSInki Dae return 0; 3381c248b7dSInki Dae } 3391c248b7dSInki Dae 34040cd7e0cSInki Dae int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 34140cd7e0cSInki Dae struct drm_file *file_priv) 342b4cfd4ddSJoonyoung Shim { 343813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 34440cd7e0cSInki Dae struct drm_exynos_gem_info *args = data; 34540cd7e0cSInki Dae struct drm_gem_object *obj; 34640cd7e0cSInki Dae 34740cd7e0cSInki Dae mutex_lock(&dev->struct_mutex); 34840cd7e0cSInki Dae 34940cd7e0cSInki Dae obj = drm_gem_object_lookup(dev, file_priv, args->handle); 35040cd7e0cSInki Dae if (!obj) { 35140cd7e0cSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 35240cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 35340cd7e0cSInki Dae return -EINVAL; 35440cd7e0cSInki Dae } 35540cd7e0cSInki Dae 356813fd67bSJoonyoung Shim exynos_gem = to_exynos_gem(obj); 35740cd7e0cSInki Dae 358813fd67bSJoonyoung Shim args->flags = exynos_gem->flags; 359813fd67bSJoonyoung Shim args->size = exynos_gem->size; 36040cd7e0cSInki Dae 36140cd7e0cSInki Dae drm_gem_object_unreference(obj); 36240cd7e0cSInki Dae mutex_unlock(&dev->struct_mutex); 36340cd7e0cSInki Dae 36440cd7e0cSInki Dae return 0; 36540cd7e0cSInki Dae } 36640cd7e0cSInki Dae 3672a3098ffSInki Dae int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, 3682a3098ffSInki Dae struct sg_table *sgt, 3692a3098ffSInki Dae enum dma_data_direction dir) 3702a3098ffSInki Dae { 3712a3098ffSInki Dae int nents; 3722a3098ffSInki Dae 3732a3098ffSInki Dae mutex_lock(&drm_dev->struct_mutex); 3742a3098ffSInki Dae 3752a3098ffSInki Dae nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 3762a3098ffSInki Dae if (!nents) { 3772a3098ffSInki Dae DRM_ERROR("failed to map sgl with dma.\n"); 3782a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 3792a3098ffSInki Dae return nents; 3802a3098ffSInki Dae } 3812a3098ffSInki Dae 3822a3098ffSInki Dae mutex_unlock(&drm_dev->struct_mutex); 3832a3098ffSInki Dae return 0; 3842a3098ffSInki Dae } 3852a3098ffSInki Dae 3862a3098ffSInki Dae void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, 3872a3098ffSInki Dae struct sg_table *sgt, 3882a3098ffSInki Dae enum dma_data_direction dir) 3892a3098ffSInki Dae { 3902a3098ffSInki Dae dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); 3912a3098ffSInki Dae } 3922a3098ffSInki Dae 393ee5e770eSJoonyoung Shim void exynos_drm_gem_free_object(struct drm_gem_object *obj) 3941c248b7dSInki Dae { 395813fd67bSJoonyoung Shim exynos_drm_gem_destroy(to_exynos_gem(obj)); 3961c248b7dSInki Dae } 3971c248b7dSInki Dae 3981c248b7dSInki Dae int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 399ee5e770eSJoonyoung Shim struct drm_device *dev, 400ee5e770eSJoonyoung Shim struct drm_mode_create_dumb *args) 4011c248b7dSInki Dae { 402813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 403333e8e58SJoonyoung Shim unsigned int flags; 4042364839aSJoonyoung Shim int ret; 4051c248b7dSInki Dae 4061c248b7dSInki Dae /* 407c6b78bc8SMasanari Iida * allocate memory to be used for framebuffer. 4081c248b7dSInki Dae * - this callback would be called by user application 4091c248b7dSInki Dae * with DRM_IOCTL_MODE_CREATE_DUMB command. 4101c248b7dSInki Dae */ 4111c248b7dSInki Dae 4123fd6b694SCooper Yuan args->pitch = args->width * ((args->bpp + 7) / 8); 4137da5907cSInki Dae args->size = args->pitch * args->height; 4141c248b7dSInki Dae 415333e8e58SJoonyoung Shim if (is_drm_iommu_supported(dev)) 416333e8e58SJoonyoung Shim flags = EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC; 417333e8e58SJoonyoung Shim else 418333e8e58SJoonyoung Shim flags = EXYNOS_BO_CONTIG | EXYNOS_BO_WC; 4193fec4532SVikas Sajjan 420813fd67bSJoonyoung Shim exynos_gem = exynos_drm_gem_create(dev, flags, args->size); 421813fd67bSJoonyoung Shim if (IS_ERR(exynos_gem)) { 422122beea8SRahul Sharma dev_warn(dev->dev, "FB allocation failed.\n"); 423813fd67bSJoonyoung Shim return PTR_ERR(exynos_gem); 424122beea8SRahul Sharma } 4251c248b7dSInki Dae 426813fd67bSJoonyoung Shim ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, 4272364839aSJoonyoung Shim &args->handle); 4282364839aSJoonyoung Shim if (ret) { 429813fd67bSJoonyoung Shim exynos_drm_gem_destroy(exynos_gem); 4302364839aSJoonyoung Shim return ret; 4312364839aSJoonyoung Shim } 4322364839aSJoonyoung Shim 4331c248b7dSInki Dae return 0; 4341c248b7dSInki Dae } 4351c248b7dSInki Dae 4361c248b7dSInki Dae int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 437ee5e770eSJoonyoung Shim struct drm_device *dev, uint32_t handle, 438ee5e770eSJoonyoung Shim uint64_t *offset) 4391c248b7dSInki Dae { 4401c248b7dSInki Dae struct drm_gem_object *obj; 4412d91cf17SJoonyoung Shim int ret = 0; 4421c248b7dSInki Dae 4431c248b7dSInki Dae mutex_lock(&dev->struct_mutex); 4441c248b7dSInki Dae 4451c248b7dSInki Dae /* 4461c248b7dSInki Dae * get offset of memory allocated for drm framebuffer. 4471c248b7dSInki Dae * - this callback would be called by user application 4481c248b7dSInki Dae * with DRM_IOCTL_MODE_MAP_DUMB command. 4491c248b7dSInki Dae */ 4501c248b7dSInki Dae 4511c248b7dSInki Dae obj = drm_gem_object_lookup(dev, file_priv, handle); 4521c248b7dSInki Dae if (!obj) { 4531c248b7dSInki Dae DRM_ERROR("failed to lookup gem object.\n"); 4542d91cf17SJoonyoung Shim ret = -EINVAL; 4552d91cf17SJoonyoung Shim goto unlock; 4561c248b7dSInki Dae } 4571c248b7dSInki Dae 4580de23977SDavid Herrmann *offset = drm_vma_node_offset_addr(&obj->vma_node); 4591c248b7dSInki Dae DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); 4601c248b7dSInki Dae 4612d91cf17SJoonyoung Shim drm_gem_object_unreference(obj); 4622d91cf17SJoonyoung Shim unlock: 4631c248b7dSInki Dae mutex_unlock(&dev->struct_mutex); 4642d91cf17SJoonyoung Shim return ret; 4651c248b7dSInki Dae } 4661c248b7dSInki Dae 4671c248b7dSInki Dae int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 4681c248b7dSInki Dae { 4691c248b7dSInki Dae struct drm_gem_object *obj = vma->vm_private_data; 470813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); 4710e9a2ee3SJoonyoung Shim unsigned long pfn; 4721c248b7dSInki Dae pgoff_t page_offset; 4731c248b7dSInki Dae int ret; 4741c248b7dSInki Dae 4751c248b7dSInki Dae page_offset = ((unsigned long)vmf->virtual_address - 4761c248b7dSInki Dae vma->vm_start) >> PAGE_SHIFT; 4771c248b7dSInki Dae 478813fd67bSJoonyoung Shim if (page_offset >= (exynos_gem->size >> PAGE_SHIFT)) { 4790e9a2ee3SJoonyoung Shim DRM_ERROR("invalid page offset\n"); 4800e9a2ee3SJoonyoung Shim ret = -EINVAL; 4810e9a2ee3SJoonyoung Shim goto out; 4820e9a2ee3SJoonyoung Shim } 4831c248b7dSInki Dae 484813fd67bSJoonyoung Shim pfn = page_to_pfn(exynos_gem->pages[page_offset]); 4850e9a2ee3SJoonyoung Shim ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 4860e9a2ee3SJoonyoung Shim 4870e9a2ee3SJoonyoung Shim out: 48823597e26SJoonyoung Shim switch (ret) { 48923597e26SJoonyoung Shim case 0: 49023597e26SJoonyoung Shim case -ERESTARTSYS: 49123597e26SJoonyoung Shim case -EINTR: 49223597e26SJoonyoung Shim return VM_FAULT_NOPAGE; 49323597e26SJoonyoung Shim case -ENOMEM: 49423597e26SJoonyoung Shim return VM_FAULT_OOM; 49523597e26SJoonyoung Shim default: 49623597e26SJoonyoung Shim return VM_FAULT_SIGBUS; 49723597e26SJoonyoung Shim } 4981c248b7dSInki Dae } 4991c248b7dSInki Dae 5001c248b7dSInki Dae int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 5011c248b7dSInki Dae { 502813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 503c01d73faSInki Dae struct drm_gem_object *obj; 5041c248b7dSInki Dae int ret; 5051c248b7dSInki Dae 5061c248b7dSInki Dae /* set vm_area_struct. */ 5071c248b7dSInki Dae ret = drm_gem_mmap(filp, vma); 5081c248b7dSInki Dae if (ret < 0) { 5091c248b7dSInki Dae DRM_ERROR("failed to mmap.\n"); 5101c248b7dSInki Dae return ret; 5111c248b7dSInki Dae } 5121c248b7dSInki Dae 513c01d73faSInki Dae obj = vma->vm_private_data; 514813fd67bSJoonyoung Shim exynos_gem = to_exynos_gem(obj); 515c01d73faSInki Dae 516813fd67bSJoonyoung Shim DRM_DEBUG_KMS("flags = 0x%x\n", exynos_gem->flags); 517211b8878SJoonyoung Shim 518211b8878SJoonyoung Shim /* non-cachable as default. */ 519813fd67bSJoonyoung Shim if (exynos_gem->flags & EXYNOS_BO_CACHABLE) 520211b8878SJoonyoung Shim vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 521813fd67bSJoonyoung Shim else if (exynos_gem->flags & EXYNOS_BO_WC) 522211b8878SJoonyoung Shim vma->vm_page_prot = 523211b8878SJoonyoung Shim pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 524211b8878SJoonyoung Shim else 525211b8878SJoonyoung Shim vma->vm_page_prot = 526211b8878SJoonyoung Shim pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 527c01d73faSInki Dae 528813fd67bSJoonyoung Shim ret = exynos_drm_gem_mmap_buffer(exynos_gem, vma); 529832316c7SInki Dae if (ret) 530832316c7SInki Dae goto err_close_vm; 531832316c7SInki Dae 532832316c7SInki Dae return ret; 533832316c7SInki Dae 534832316c7SInki Dae err_close_vm: 535832316c7SInki Dae drm_gem_vm_close(vma); 536832316c7SInki Dae 5371c248b7dSInki Dae return ret; 5381c248b7dSInki Dae } 53901ed50ddSJoonyoung Shim 54001ed50ddSJoonyoung Shim /* low-level interface prime helpers */ 54101ed50ddSJoonyoung Shim struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj) 54201ed50ddSJoonyoung Shim { 543813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); 54401ed50ddSJoonyoung Shim int npages; 54501ed50ddSJoonyoung Shim 546813fd67bSJoonyoung Shim npages = exynos_gem->size >> PAGE_SHIFT; 54701ed50ddSJoonyoung Shim 548813fd67bSJoonyoung Shim return drm_prime_pages_to_sg(exynos_gem->pages, npages); 54901ed50ddSJoonyoung Shim } 55001ed50ddSJoonyoung Shim 55101ed50ddSJoonyoung Shim struct drm_gem_object * 55201ed50ddSJoonyoung Shim exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, 55301ed50ddSJoonyoung Shim struct dma_buf_attachment *attach, 55401ed50ddSJoonyoung Shim struct sg_table *sgt) 55501ed50ddSJoonyoung Shim { 556813fd67bSJoonyoung Shim struct exynos_drm_gem *exynos_gem; 55701ed50ddSJoonyoung Shim int npages; 55801ed50ddSJoonyoung Shim int ret; 55901ed50ddSJoonyoung Shim 560813fd67bSJoonyoung Shim exynos_gem = exynos_drm_gem_init(dev, attach->dmabuf->size); 561813fd67bSJoonyoung Shim if (IS_ERR(exynos_gem)) { 562813fd67bSJoonyoung Shim ret = PTR_ERR(exynos_gem); 56350002d4cSInki Dae return ERR_PTR(ret); 56401ed50ddSJoonyoung Shim } 56501ed50ddSJoonyoung Shim 566813fd67bSJoonyoung Shim exynos_gem->dma_addr = sg_dma_address(sgt->sgl); 5672a8cb489SJoonyoung Shim 568813fd67bSJoonyoung Shim npages = exynos_gem->size >> PAGE_SHIFT; 569813fd67bSJoonyoung Shim exynos_gem->pages = drm_malloc_ab(npages, sizeof(struct page *)); 570813fd67bSJoonyoung Shim if (!exynos_gem->pages) { 5712a8cb489SJoonyoung Shim ret = -ENOMEM; 5722a8cb489SJoonyoung Shim goto err; 5732a8cb489SJoonyoung Shim } 5742a8cb489SJoonyoung Shim 575813fd67bSJoonyoung Shim ret = drm_prime_sg_to_page_addr_arrays(sgt, exynos_gem->pages, NULL, 5762a8cb489SJoonyoung Shim npages); 5772a8cb489SJoonyoung Shim if (ret < 0) 5782a8cb489SJoonyoung Shim goto err_free_large; 5792a8cb489SJoonyoung Shim 580813fd67bSJoonyoung Shim exynos_gem->sgt = sgt; 5817c93537aSJoonyoung Shim 58201ed50ddSJoonyoung Shim if (sgt->nents == 1) { 58301ed50ddSJoonyoung Shim /* always physically continuous memory if sgt->nents is 1. */ 584813fd67bSJoonyoung Shim exynos_gem->flags |= EXYNOS_BO_CONTIG; 58501ed50ddSJoonyoung Shim } else { 58601ed50ddSJoonyoung Shim /* 58701ed50ddSJoonyoung Shim * this case could be CONTIG or NONCONTIG type but for now 58801ed50ddSJoonyoung Shim * sets NONCONTIG. 58901ed50ddSJoonyoung Shim * TODO. we have to find a way that exporter can notify 59001ed50ddSJoonyoung Shim * the type of its own buffer to importer. 59101ed50ddSJoonyoung Shim */ 592813fd67bSJoonyoung Shim exynos_gem->flags |= EXYNOS_BO_NONCONTIG; 59301ed50ddSJoonyoung Shim } 59401ed50ddSJoonyoung Shim 595813fd67bSJoonyoung Shim return &exynos_gem->base; 59601ed50ddSJoonyoung Shim 59701ed50ddSJoonyoung Shim err_free_large: 598813fd67bSJoonyoung Shim drm_free_large(exynos_gem->pages); 59901ed50ddSJoonyoung Shim err: 600813fd67bSJoonyoung Shim drm_gem_object_release(&exynos_gem->base); 601813fd67bSJoonyoung Shim kfree(exynos_gem); 60201ed50ddSJoonyoung Shim return ERR_PTR(ret); 60301ed50ddSJoonyoung Shim } 60401ed50ddSJoonyoung Shim 60501ed50ddSJoonyoung Shim void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj) 60601ed50ddSJoonyoung Shim { 60701ed50ddSJoonyoung Shim return NULL; 60801ed50ddSJoonyoung Shim } 60901ed50ddSJoonyoung Shim 61001ed50ddSJoonyoung Shim void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 61101ed50ddSJoonyoung Shim { 61201ed50ddSJoonyoung Shim /* Nothing to do */ 61301ed50ddSJoonyoung Shim } 614