Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 1 | /* exynos_drm_gem.c |
| 2 | * |
| 3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
| 4 | * Author: Inki Dae <inki.dae@samsung.com> |
| 5 | * |
Inki Dae | d81aecb | 2012-12-18 02:30:17 +0900 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 10 | */ |
| 11 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 12 | #include <drm/drmP.h> |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 13 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 14 | #include <linux/shmem_fs.h> |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 15 | #include <drm/exynos_drm.h> |
| 16 | |
| 17 | #include "exynos_drm_drv.h" |
| 18 | #include "exynos_drm_gem.h" |
| 19 | #include "exynos_drm_buf.h" |
| 20 | |
| 21 | static unsigned int convert_to_vm_err_msg(int msg) |
| 22 | { |
| 23 | unsigned int out_msg; |
| 24 | |
| 25 | switch (msg) { |
| 26 | case 0: |
| 27 | case -ERESTARTSYS: |
| 28 | case -EINTR: |
| 29 | out_msg = VM_FAULT_NOPAGE; |
| 30 | break; |
| 31 | |
| 32 | case -ENOMEM: |
| 33 | out_msg = VM_FAULT_OOM; |
| 34 | break; |
| 35 | |
| 36 | default: |
| 37 | out_msg = VM_FAULT_SIGBUS; |
| 38 | break; |
| 39 | } |
| 40 | |
| 41 | return out_msg; |
| 42 | } |
| 43 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 44 | static int check_gem_flags(unsigned int flags) |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 45 | { |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 46 | if (flags & ~(EXYNOS_BO_MASK)) { |
| 47 | DRM_ERROR("invalid flags.\n"); |
| 48 | return -EINVAL; |
| 49 | } |
| 50 | |
| 51 | return 0; |
| 52 | } |
| 53 | |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 54 | static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj, |
| 55 | struct vm_area_struct *vma) |
| 56 | { |
| 57 | DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); |
| 58 | |
| 59 | /* non-cachable as default. */ |
| 60 | if (obj->flags & EXYNOS_BO_CACHABLE) |
| 61 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
| 62 | else if (obj->flags & EXYNOS_BO_WC) |
| 63 | vma->vm_page_prot = |
| 64 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); |
| 65 | else |
| 66 | vma->vm_page_prot = |
| 67 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); |
| 68 | } |
| 69 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 70 | static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) |
| 71 | { |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 72 | /* TODO */ |
| 73 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 74 | return roundup(size, PAGE_SIZE); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 75 | } |
| 76 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 77 | static int exynos_drm_gem_map_buf(struct drm_gem_object *obj, |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 78 | struct vm_area_struct *vma, |
| 79 | unsigned long f_vaddr, |
| 80 | pgoff_t page_offset) |
| 81 | { |
| 82 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| 83 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
Rahul Sharma | 4ddc404 | 2012-11-05 21:04:29 +0530 | [diff] [blame] | 84 | struct scatterlist *sgl; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 85 | unsigned long pfn; |
Rahul Sharma | 4ddc404 | 2012-11-05 21:04:29 +0530 | [diff] [blame] | 86 | int i; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 87 | |
Prathyush K | 465ed66 | 2012-11-20 19:32:56 +0900 | [diff] [blame] | 88 | if (!buf->sgt) |
| 89 | return -EINTR; |
Rahul Sharma | 4ddc404 | 2012-11-05 21:04:29 +0530 | [diff] [blame] | 90 | |
Prathyush K | 465ed66 | 2012-11-20 19:32:56 +0900 | [diff] [blame] | 91 | if (page_offset >= (buf->size >> PAGE_SHIFT)) { |
| 92 | DRM_ERROR("invalid page offset\n"); |
| 93 | return -EINVAL; |
Rahul Sharma | 4ddc404 | 2012-11-05 21:04:29 +0530 | [diff] [blame] | 94 | } |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 95 | |
Prathyush K | 465ed66 | 2012-11-20 19:32:56 +0900 | [diff] [blame] | 96 | sgl = buf->sgt->sgl; |
| 97 | for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) { |
| 98 | if (page_offset < (sgl->length >> PAGE_SHIFT)) |
| 99 | break; |
| 100 | page_offset -= (sgl->length >> PAGE_SHIFT); |
| 101 | } |
| 102 | |
| 103 | pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset; |
| 104 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 105 | return vm_insert_mixed(vma, f_vaddr, pfn); |
| 106 | } |
| 107 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 108 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
| 109 | struct drm_file *file_priv, |
| 110 | unsigned int *handle) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 111 | { |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 112 | int ret; |
| 113 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 114 | /* |
| 115 | * allocate a id of idr table where the obj is registered |
| 116 | * and handle has the id what user can see. |
| 117 | */ |
| 118 | ret = drm_gem_handle_create(file_priv, obj, handle); |
| 119 | if (ret) |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 120 | return ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 121 | |
| 122 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); |
| 123 | |
| 124 | /* drop reference from allocate - handle holds it now. */ |
| 125 | drm_gem_object_unreference_unlocked(obj); |
| 126 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 127 | return 0; |
| 128 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 129 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 130 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) |
| 131 | { |
| 132 | struct drm_gem_object *obj; |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 133 | struct exynos_drm_gem_buf *buf; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 134 | |
| 135 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 136 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 137 | obj = &exynos_gem_obj->base; |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 138 | buf = exynos_gem_obj->buffer; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 139 | |
| 140 | DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); |
| 141 | |
Inki Dae | c374e73 | 2012-06-12 16:52:54 +0900 | [diff] [blame] | 142 | /* |
| 143 | * do not release memory region from exporter. |
| 144 | * |
| 145 | * the region will be released by exporter |
| 146 | * once dmabuf's refcount becomes 0. |
| 147 | */ |
| 148 | if (obj->import_attach) |
| 149 | goto out; |
| 150 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 151 | exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 152 | |
Inki Dae | c374e73 | 2012-06-12 16:52:54 +0900 | [diff] [blame] | 153 | out: |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 154 | exynos_drm_fini_buf(obj->dev, buf); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 155 | exynos_gem_obj->buffer = NULL; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 156 | |
| 157 | if (obj->map_list.map) |
| 158 | drm_gem_free_mmap_offset(obj); |
| 159 | |
| 160 | /* release file pointer to gem object. */ |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 161 | drm_gem_object_release(obj); |
| 162 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 163 | kfree(exynos_gem_obj); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 164 | exynos_gem_obj = NULL; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 165 | } |
| 166 | |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 167 | struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 168 | unsigned long size) |
| 169 | { |
| 170 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 171 | struct drm_gem_object *obj; |
| 172 | int ret; |
| 173 | |
| 174 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); |
| 175 | if (!exynos_gem_obj) { |
| 176 | DRM_ERROR("failed to allocate exynos gem object\n"); |
| 177 | return NULL; |
| 178 | } |
| 179 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 180 | exynos_gem_obj->size = size; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 181 | obj = &exynos_gem_obj->base; |
| 182 | |
| 183 | ret = drm_gem_object_init(dev, obj, size); |
| 184 | if (ret < 0) { |
| 185 | DRM_ERROR("failed to initialize gem object\n"); |
| 186 | kfree(exynos_gem_obj); |
| 187 | return NULL; |
| 188 | } |
| 189 | |
| 190 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); |
| 191 | |
| 192 | return exynos_gem_obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 193 | } |
| 194 | |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 195 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 196 | unsigned int flags, |
| 197 | unsigned long size) |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 198 | { |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 199 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 200 | struct exynos_drm_gem_buf *buf; |
| 201 | int ret; |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 202 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 203 | if (!size) { |
| 204 | DRM_ERROR("invalid size.\n"); |
| 205 | return ERR_PTR(-EINVAL); |
| 206 | } |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 207 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 208 | size = roundup_gem_size(size, flags); |
| 209 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 210 | |
| 211 | ret = check_gem_flags(flags); |
| 212 | if (ret) |
| 213 | return ERR_PTR(ret); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 214 | |
| 215 | buf = exynos_drm_init_buf(dev, size); |
| 216 | if (!buf) |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 217 | return ERR_PTR(-ENOMEM); |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 218 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 219 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
| 220 | if (!exynos_gem_obj) { |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 221 | ret = -ENOMEM; |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 222 | goto err_fini_buf; |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 223 | } |
| 224 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 225 | exynos_gem_obj->buffer = buf; |
| 226 | |
| 227 | /* set memory type and cache attribute from user side. */ |
| 228 | exynos_gem_obj->flags = flags; |
| 229 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 230 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
| 231 | if (ret < 0) { |
| 232 | drm_gem_object_release(&exynos_gem_obj->base); |
| 233 | goto err_fini_buf; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 234 | } |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 235 | |
| 236 | return exynos_gem_obj; |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 237 | |
| 238 | err_fini_buf: |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 239 | exynos_drm_fini_buf(dev, buf); |
| 240 | return ERR_PTR(ret); |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 241 | } |
| 242 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 243 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 244 | struct drm_file *file_priv) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 245 | { |
| 246 | struct drm_exynos_gem_create *args = data; |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 247 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 248 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 249 | |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 250 | DRM_DEBUG_KMS("%s\n", __FILE__); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 251 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 252 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 253 | if (IS_ERR(exynos_gem_obj)) |
| 254 | return PTR_ERR(exynos_gem_obj); |
| 255 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 256 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| 257 | &args->handle); |
| 258 | if (ret) { |
| 259 | exynos_drm_gem_destroy(exynos_gem_obj); |
| 260 | return ret; |
| 261 | } |
| 262 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 266 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 267 | unsigned int gem_handle, |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 268 | struct drm_file *filp) |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 269 | { |
| 270 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 271 | struct drm_gem_object *obj; |
| 272 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 273 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 274 | if (!obj) { |
| 275 | DRM_ERROR("failed to lookup gem object.\n"); |
| 276 | return ERR_PTR(-EINVAL); |
| 277 | } |
| 278 | |
| 279 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 280 | |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 281 | return &exynos_gem_obj->buffer->dma_addr; |
| 282 | } |
| 283 | |
| 284 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, |
| 285 | unsigned int gem_handle, |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 286 | struct drm_file *filp) |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 287 | { |
| 288 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 289 | struct drm_gem_object *obj; |
| 290 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 291 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 292 | if (!obj) { |
| 293 | DRM_ERROR("failed to lookup gem object.\n"); |
| 294 | return; |
| 295 | } |
| 296 | |
| 297 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 298 | |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 299 | drm_gem_object_unreference_unlocked(obj); |
| 300 | |
| 301 | /* |
| 302 | * decrease obj->refcount one more time because we has already |
| 303 | * increased it at exynos_drm_gem_get_dma_addr(). |
| 304 | */ |
| 305 | drm_gem_object_unreference_unlocked(obj); |
| 306 | } |
| 307 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 308 | int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 309 | struct drm_file *file_priv) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 310 | { |
| 311 | struct drm_exynos_gem_map_off *args = data; |
| 312 | |
| 313 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 314 | |
| 315 | DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", |
| 316 | args->handle, (unsigned long)args->offset); |
| 317 | |
| 318 | if (!(dev->driver->driver_features & DRIVER_GEM)) { |
| 319 | DRM_ERROR("does not support GEM.\n"); |
| 320 | return -ENODEV; |
| 321 | } |
| 322 | |
| 323 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, |
| 324 | &args->offset); |
| 325 | } |
| 326 | |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 327 | static struct drm_file *exynos_drm_find_drm_file(struct drm_device *drm_dev, |
| 328 | struct file *filp) |
| 329 | { |
| 330 | struct drm_file *file_priv; |
| 331 | |
| 332 | mutex_lock(&drm_dev->struct_mutex); |
| 333 | |
| 334 | /* find current process's drm_file from filelist. */ |
| 335 | list_for_each_entry(file_priv, &drm_dev->filelist, lhead) { |
| 336 | if (file_priv->filp == filp) { |
| 337 | mutex_unlock(&drm_dev->struct_mutex); |
| 338 | return file_priv; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | mutex_unlock(&drm_dev->struct_mutex); |
| 343 | WARN_ON(1); |
| 344 | |
| 345 | return ERR_PTR(-EFAULT); |
| 346 | } |
| 347 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 348 | static int exynos_drm_gem_mmap_buffer(struct file *filp, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 349 | struct vm_area_struct *vma) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 350 | { |
| 351 | struct drm_gem_object *obj = filp->private_data; |
| 352 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 353 | struct drm_device *drm_dev = obj->dev; |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 354 | struct exynos_drm_gem_buf *buffer; |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 355 | struct drm_file *file_priv; |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 356 | unsigned long vm_size; |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 357 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 358 | |
| 359 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 360 | |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 361 | vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 362 | vma->vm_private_data = obj; |
| 363 | vma->vm_ops = drm_dev->driver->gem_vm_ops; |
| 364 | |
| 365 | /* restore it to driver's fops. */ |
| 366 | filp->f_op = fops_get(drm_dev->driver->fops); |
| 367 | |
| 368 | file_priv = exynos_drm_find_drm_file(drm_dev, filp); |
| 369 | if (IS_ERR(file_priv)) |
| 370 | return PTR_ERR(file_priv); |
| 371 | |
| 372 | /* restore it to drm_file. */ |
| 373 | filp->private_data = file_priv; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 374 | |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 375 | update_vm_cache_attr(exynos_gem_obj, vma); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 376 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 377 | vm_size = vma->vm_end - vma->vm_start; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 378 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 379 | /* |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 380 | * a buffer contains information to physically continuous memory |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 381 | * allocated by user request or at framebuffer creation. |
| 382 | */ |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 383 | buffer = exynos_gem_obj->buffer; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 384 | |
| 385 | /* check if user-requested size is valid. */ |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 386 | if (vm_size > buffer->size) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 387 | return -EINVAL; |
| 388 | |
Inki Dae | 4744ad2 | 2012-12-07 17:51:27 +0900 | [diff] [blame] | 389 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 390 | buffer->dma_addr, buffer->size, |
| 391 | &buffer->dma_attrs); |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 392 | if (ret < 0) { |
| 393 | DRM_ERROR("failed to mmap.\n"); |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * take a reference to this mapping of the object. And this reference |
| 399 | * is unreferenced by the corresponding vm_close call. |
| 400 | */ |
| 401 | drm_gem_object_reference(obj); |
| 402 | |
| 403 | mutex_lock(&drm_dev->struct_mutex); |
| 404 | drm_vm_open_locked(drm_dev, vma); |
| 405 | mutex_unlock(&drm_dev->struct_mutex); |
| 406 | |
| 407 | return 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | static const struct file_operations exynos_drm_gem_fops = { |
| 411 | .mmap = exynos_drm_gem_mmap_buffer, |
| 412 | }; |
| 413 | |
| 414 | int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 415 | struct drm_file *file_priv) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 416 | { |
| 417 | struct drm_exynos_gem_mmap *args = data; |
| 418 | struct drm_gem_object *obj; |
| 419 | unsigned int addr; |
| 420 | |
| 421 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 422 | |
| 423 | if (!(dev->driver->driver_features & DRIVER_GEM)) { |
| 424 | DRM_ERROR("does not support GEM.\n"); |
| 425 | return -ENODEV; |
| 426 | } |
| 427 | |
| 428 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
| 429 | if (!obj) { |
| 430 | DRM_ERROR("failed to lookup gem object.\n"); |
| 431 | return -EINVAL; |
| 432 | } |
| 433 | |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 434 | /* |
| 435 | * Set specific mmper's fops. And it will be restored by |
| 436 | * exynos_drm_gem_mmap_buffer to dev->driver->fops. |
| 437 | * This is used to call specific mapper temporarily. |
| 438 | */ |
| 439 | file_priv->filp->f_op = &exynos_drm_gem_fops; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 440 | |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 441 | /* |
| 442 | * Set gem object to private_data so that specific mmaper |
| 443 | * can get the gem object. And it will be restored by |
| 444 | * exynos_drm_gem_mmap_buffer to drm_file. |
| 445 | */ |
| 446 | file_priv->filp->private_data = obj; |
| 447 | |
| 448 | addr = vm_mmap(file_priv->filp, 0, args->size, |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 449 | PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 450 | |
| 451 | drm_gem_object_unreference_unlocked(obj); |
| 452 | |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 453 | if (IS_ERR((void *)addr)) { |
| 454 | file_priv->filp->private_data = file_priv; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 455 | return PTR_ERR((void *)addr); |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 456 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 457 | |
| 458 | args->mapped = addr; |
| 459 | |
| 460 | DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); |
| 461 | |
| 462 | return 0; |
| 463 | } |
| 464 | |
Inki Dae | 40cd7e0 | 2012-05-04 15:51:17 +0900 | [diff] [blame] | 465 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
| 466 | struct drm_file *file_priv) |
| 467 | { struct exynos_drm_gem_obj *exynos_gem_obj; |
| 468 | struct drm_exynos_gem_info *args = data; |
| 469 | struct drm_gem_object *obj; |
| 470 | |
| 471 | mutex_lock(&dev->struct_mutex); |
| 472 | |
| 473 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
| 474 | if (!obj) { |
| 475 | DRM_ERROR("failed to lookup gem object.\n"); |
| 476 | mutex_unlock(&dev->struct_mutex); |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | |
| 480 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 481 | |
| 482 | args->flags = exynos_gem_obj->flags; |
| 483 | args->size = exynos_gem_obj->size; |
| 484 | |
| 485 | drm_gem_object_unreference(obj); |
| 486 | mutex_unlock(&dev->struct_mutex); |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
Inki Dae | 2a3098f | 2012-11-04 05:48:52 -0800 | [diff] [blame] | 491 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
| 492 | { |
| 493 | struct vm_area_struct *vma_copy; |
| 494 | |
| 495 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); |
| 496 | if (!vma_copy) |
| 497 | return NULL; |
| 498 | |
| 499 | if (vma->vm_ops && vma->vm_ops->open) |
| 500 | vma->vm_ops->open(vma); |
| 501 | |
| 502 | if (vma->vm_file) |
| 503 | get_file(vma->vm_file); |
| 504 | |
| 505 | memcpy(vma_copy, vma, sizeof(*vma)); |
| 506 | |
| 507 | vma_copy->vm_mm = NULL; |
| 508 | vma_copy->vm_next = NULL; |
| 509 | vma_copy->vm_prev = NULL; |
| 510 | |
| 511 | return vma_copy; |
| 512 | } |
| 513 | |
| 514 | void exynos_gem_put_vma(struct vm_area_struct *vma) |
| 515 | { |
| 516 | if (!vma) |
| 517 | return; |
| 518 | |
| 519 | if (vma->vm_ops && vma->vm_ops->close) |
| 520 | vma->vm_ops->close(vma); |
| 521 | |
| 522 | if (vma->vm_file) |
| 523 | fput(vma->vm_file); |
| 524 | |
| 525 | kfree(vma); |
| 526 | } |
| 527 | |
| 528 | int exynos_gem_get_pages_from_userptr(unsigned long start, |
| 529 | unsigned int npages, |
| 530 | struct page **pages, |
| 531 | struct vm_area_struct *vma) |
| 532 | { |
| 533 | int get_npages; |
| 534 | |
| 535 | /* the memory region mmaped with VM_PFNMAP. */ |
| 536 | if (vma_is_io(vma)) { |
| 537 | unsigned int i; |
| 538 | |
| 539 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { |
| 540 | unsigned long pfn; |
| 541 | int ret = follow_pfn(vma, start, &pfn); |
| 542 | if (ret) |
| 543 | return ret; |
| 544 | |
| 545 | pages[i] = pfn_to_page(pfn); |
| 546 | } |
| 547 | |
| 548 | if (i != npages) { |
| 549 | DRM_ERROR("failed to get user_pages.\n"); |
| 550 | return -EINVAL; |
| 551 | } |
| 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | get_npages = get_user_pages(current, current->mm, start, |
| 557 | npages, 1, 1, pages, NULL); |
| 558 | get_npages = max(get_npages, 0); |
| 559 | if (get_npages != npages) { |
| 560 | DRM_ERROR("failed to get user_pages.\n"); |
| 561 | while (get_npages) |
| 562 | put_page(pages[--get_npages]); |
| 563 | return -EFAULT; |
| 564 | } |
| 565 | |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | void exynos_gem_put_pages_to_userptr(struct page **pages, |
| 570 | unsigned int npages, |
| 571 | struct vm_area_struct *vma) |
| 572 | { |
| 573 | if (!vma_is_io(vma)) { |
| 574 | unsigned int i; |
| 575 | |
| 576 | for (i = 0; i < npages; i++) { |
| 577 | set_page_dirty_lock(pages[i]); |
| 578 | |
| 579 | /* |
| 580 | * undo the reference we took when populating |
| 581 | * the table. |
| 582 | */ |
| 583 | put_page(pages[i]); |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, |
| 589 | struct sg_table *sgt, |
| 590 | enum dma_data_direction dir) |
| 591 | { |
| 592 | int nents; |
| 593 | |
| 594 | mutex_lock(&drm_dev->struct_mutex); |
| 595 | |
| 596 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); |
| 597 | if (!nents) { |
| 598 | DRM_ERROR("failed to map sgl with dma.\n"); |
| 599 | mutex_unlock(&drm_dev->struct_mutex); |
| 600 | return nents; |
| 601 | } |
| 602 | |
| 603 | mutex_unlock(&drm_dev->struct_mutex); |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, |
| 608 | struct sg_table *sgt, |
| 609 | enum dma_data_direction dir) |
| 610 | { |
| 611 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); |
| 612 | } |
| 613 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 614 | int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
| 615 | { |
| 616 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 617 | |
| 618 | return 0; |
| 619 | } |
| 620 | |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 621 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 622 | { |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 623 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 624 | struct exynos_drm_gem_buf *buf; |
| 625 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 626 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 627 | |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 628 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 629 | buf = exynos_gem_obj->buffer; |
| 630 | |
| 631 | if (obj->import_attach) |
| 632 | drm_prime_gem_destroy(obj, buf->sgt); |
| 633 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 634 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 638 | struct drm_device *dev, |
| 639 | struct drm_mode_create_dumb *args) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 640 | { |
| 641 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 642 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 643 | |
| 644 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 645 | |
| 646 | /* |
| 647 | * alocate memory to be used for framebuffer. |
| 648 | * - this callback would be called by user application |
| 649 | * with DRM_IOCTL_MODE_CREATE_DUMB command. |
| 650 | */ |
| 651 | |
Cooper Yuan | 3fd6b69 | 2012-06-29 11:49:45 +0900 | [diff] [blame] | 652 | args->pitch = args->width * ((args->bpp + 7) / 8); |
Inki Dae | 7da5907 | 2012-08-17 15:24:03 +0900 | [diff] [blame] | 653 | args->size = args->pitch * args->height; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 654 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 655 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 656 | if (IS_ERR(exynos_gem_obj)) |
| 657 | return PTR_ERR(exynos_gem_obj); |
| 658 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 659 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| 660 | &args->handle); |
| 661 | if (ret) { |
| 662 | exynos_drm_gem_destroy(exynos_gem_obj); |
| 663 | return ret; |
| 664 | } |
| 665 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 670 | struct drm_device *dev, uint32_t handle, |
| 671 | uint64_t *offset) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 672 | { |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 673 | struct drm_gem_object *obj; |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 674 | int ret = 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 675 | |
| 676 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 677 | |
| 678 | mutex_lock(&dev->struct_mutex); |
| 679 | |
| 680 | /* |
| 681 | * get offset of memory allocated for drm framebuffer. |
| 682 | * - this callback would be called by user application |
| 683 | * with DRM_IOCTL_MODE_MAP_DUMB command. |
| 684 | */ |
| 685 | |
| 686 | obj = drm_gem_object_lookup(dev, file_priv, handle); |
| 687 | if (!obj) { |
| 688 | DRM_ERROR("failed to lookup gem object.\n"); |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 689 | ret = -EINVAL; |
| 690 | goto unlock; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 691 | } |
| 692 | |
Laurent Pinchart | 6037baf | 2012-05-16 17:08:55 +0200 | [diff] [blame] | 693 | if (!obj->map_list.map) { |
| 694 | ret = drm_gem_create_mmap_offset(obj); |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 695 | if (ret) |
| 696 | goto out; |
| 697 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 698 | |
Laurent Pinchart | 6037baf | 2012-05-16 17:08:55 +0200 | [diff] [blame] | 699 | *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 700 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
| 701 | |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 702 | out: |
| 703 | drm_gem_object_unreference(obj); |
| 704 | unlock: |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 705 | mutex_unlock(&dev->struct_mutex); |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 706 | return ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 707 | } |
| 708 | |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 709 | int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, |
| 710 | struct drm_device *dev, |
| 711 | unsigned int handle) |
| 712 | { |
| 713 | int ret; |
| 714 | |
| 715 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 716 | |
| 717 | /* |
| 718 | * obj->refcount and obj->handle_count are decreased and |
| 719 | * if both them are 0 then exynos_drm_gem_free_object() |
| 720 | * would be called by callback to release resources. |
| 721 | */ |
| 722 | ret = drm_gem_handle_delete(file_priv, handle); |
| 723 | if (ret < 0) { |
| 724 | DRM_ERROR("failed to delete drm_gem_handle.\n"); |
| 725 | return ret; |
| 726 | } |
| 727 | |
| 728 | return 0; |
| 729 | } |
| 730 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 731 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 732 | { |
| 733 | struct drm_gem_object *obj = vma->vm_private_data; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 734 | struct drm_device *dev = obj->dev; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 735 | unsigned long f_vaddr; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 736 | pgoff_t page_offset; |
| 737 | int ret; |
| 738 | |
| 739 | page_offset = ((unsigned long)vmf->virtual_address - |
| 740 | vma->vm_start) >> PAGE_SHIFT; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 741 | f_vaddr = (unsigned long)vmf->virtual_address; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 742 | |
| 743 | mutex_lock(&dev->struct_mutex); |
| 744 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 745 | ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 746 | if (ret < 0) |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 747 | DRM_ERROR("failed to map a buffer with user.\n"); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 748 | |
| 749 | mutex_unlock(&dev->struct_mutex); |
| 750 | |
| 751 | return convert_to_vm_err_msg(ret); |
| 752 | } |
| 753 | |
| 754 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
| 755 | { |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 756 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 757 | struct drm_gem_object *obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 758 | int ret; |
| 759 | |
| 760 | DRM_DEBUG_KMS("%s\n", __FILE__); |
| 761 | |
| 762 | /* set vm_area_struct. */ |
| 763 | ret = drm_gem_mmap(filp, vma); |
| 764 | if (ret < 0) { |
| 765 | DRM_ERROR("failed to mmap.\n"); |
| 766 | return ret; |
| 767 | } |
| 768 | |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 769 | obj = vma->vm_private_data; |
| 770 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 771 | |
| 772 | ret = check_gem_flags(exynos_gem_obj->flags); |
| 773 | if (ret) { |
| 774 | drm_gem_vm_close(vma); |
| 775 | drm_gem_free_mmap_offset(obj); |
| 776 | return ret; |
| 777 | } |
| 778 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 779 | vma->vm_flags &= ~VM_PFNMAP; |
| 780 | vma->vm_flags |= VM_MIXEDMAP; |
| 781 | |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 782 | update_vm_cache_attr(exynos_gem_obj, vma); |
| 783 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 784 | return ret; |
| 785 | } |