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> |
David Herrmann | 0de2397 | 2013-07-24 21:07:52 +0200 | [diff] [blame] | 13 | #include <drm/drm_vma_manager.h> |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 14 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 15 | #include <linux/shmem_fs.h> |
Joonyoung Shim | 01ed50d | 2015-08-16 14:33:08 +0900 | [diff] [blame^] | 16 | #include <linux/dma-buf.h> |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 17 | #include <drm/exynos_drm.h> |
| 18 | |
| 19 | #include "exynos_drm_drv.h" |
| 20 | #include "exynos_drm_gem.h" |
| 21 | #include "exynos_drm_buf.h" |
Vikas Sajjan | 3fec453 | 2013-08-23 12:05:06 +0530 | [diff] [blame] | 22 | #include "exynos_drm_iommu.h" |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 23 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 24 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
| 25 | struct drm_file *file_priv, |
| 26 | unsigned int *handle) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 27 | { |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 28 | int ret; |
| 29 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 30 | /* |
| 31 | * allocate a id of idr table where the obj is registered |
| 32 | * and handle has the id what user can see. |
| 33 | */ |
| 34 | ret = drm_gem_handle_create(file_priv, obj, handle); |
| 35 | if (ret) |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 36 | return ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 37 | |
| 38 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); |
| 39 | |
| 40 | /* drop reference from allocate - handle holds it now. */ |
| 41 | drm_gem_object_unreference_unlocked(obj); |
| 42 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 43 | return 0; |
| 44 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 45 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 46 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) |
| 47 | { |
| 48 | struct drm_gem_object *obj; |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 49 | struct exynos_drm_gem_buf *buf; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 50 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 51 | obj = &exynos_gem_obj->base; |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 52 | buf = exynos_gem_obj->buffer; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 53 | |
Daniel Vetter | a8e11d1 | 2013-08-15 00:02:37 +0200 | [diff] [blame] | 54 | DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 55 | |
Inki Dae | c374e73 | 2012-06-12 16:52:54 +0900 | [diff] [blame] | 56 | /* |
| 57 | * do not release memory region from exporter. |
| 58 | * |
| 59 | * the region will be released by exporter |
| 60 | * once dmabuf's refcount becomes 0. |
| 61 | */ |
| 62 | if (obj->import_attach) |
| 63 | goto out; |
| 64 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 65 | exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 66 | |
Inki Dae | c374e73 | 2012-06-12 16:52:54 +0900 | [diff] [blame] | 67 | out: |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 68 | exynos_drm_fini_buf(obj->dev, buf); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 69 | exynos_gem_obj->buffer = NULL; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 70 | |
David Herrmann | 0de2397 | 2013-07-24 21:07:52 +0200 | [diff] [blame] | 71 | drm_gem_free_mmap_offset(obj); |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 72 | |
| 73 | /* release file pointer to gem object. */ |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 74 | drm_gem_object_release(obj); |
| 75 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 76 | kfree(exynos_gem_obj); |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 77 | exynos_gem_obj = NULL; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 78 | } |
| 79 | |
Inki Dae | a4f19aa | 2013-03-11 21:15:59 +0900 | [diff] [blame] | 80 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
| 81 | unsigned int gem_handle, |
| 82 | struct drm_file *file_priv) |
| 83 | { |
| 84 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 85 | struct drm_gem_object *obj; |
| 86 | |
| 87 | obj = drm_gem_object_lookup(dev, file_priv, gem_handle); |
| 88 | if (!obj) { |
| 89 | DRM_ERROR("failed to lookup gem object.\n"); |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 94 | |
| 95 | drm_gem_object_unreference_unlocked(obj); |
| 96 | |
| 97 | return exynos_gem_obj->buffer->size; |
| 98 | } |
| 99 | |
| 100 | |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 101 | 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] | 102 | unsigned long size) |
| 103 | { |
| 104 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 105 | struct drm_gem_object *obj; |
| 106 | int ret; |
| 107 | |
| 108 | exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); |
Sachin Kamat | 38bb525 | 2013-08-19 19:04:55 +0900 | [diff] [blame] | 109 | if (!exynos_gem_obj) |
Joonyoung Shim | 5f3f426 | 2015-07-28 17:53:22 +0900 | [diff] [blame] | 110 | return ERR_PTR(-ENOMEM); |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 111 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 112 | exynos_gem_obj->size = size; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 113 | obj = &exynos_gem_obj->base; |
| 114 | |
| 115 | ret = drm_gem_object_init(dev, obj, size); |
| 116 | if (ret < 0) { |
| 117 | DRM_ERROR("failed to initialize gem object\n"); |
| 118 | kfree(exynos_gem_obj); |
Joonyoung Shim | 5f3f426 | 2015-07-28 17:53:22 +0900 | [diff] [blame] | 119 | return ERR_PTR(ret); |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); |
| 123 | |
| 124 | return exynos_gem_obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 125 | } |
| 126 | |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 127 | 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] | 128 | unsigned int flags, |
| 129 | unsigned long size) |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 130 | { |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 131 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 132 | struct exynos_drm_gem_buf *buf; |
| 133 | int ret; |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 134 | |
Joonyoung Shim | c4130bc | 2015-08-16 14:15:06 +0900 | [diff] [blame] | 135 | if (flags & ~(EXYNOS_BO_MASK)) { |
| 136 | DRM_ERROR("invalid flags.\n"); |
| 137 | return ERR_PTR(-EINVAL); |
| 138 | } |
| 139 | |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 140 | if (!size) { |
| 141 | DRM_ERROR("invalid size.\n"); |
| 142 | return ERR_PTR(-EINVAL); |
| 143 | } |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 144 | |
Joonyoung Shim | eb57da8 | 2015-07-28 17:53:27 +0900 | [diff] [blame] | 145 | size = roundup(size, PAGE_SIZE); |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 146 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 147 | buf = exynos_drm_init_buf(dev, size); |
| 148 | if (!buf) |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 149 | return ERR_PTR(-ENOMEM); |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 150 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 151 | exynos_gem_obj = exynos_drm_gem_init(dev, size); |
Joonyoung Shim | 5f3f426 | 2015-07-28 17:53:22 +0900 | [diff] [blame] | 152 | if (IS_ERR(exynos_gem_obj)) { |
| 153 | ret = PTR_ERR(exynos_gem_obj); |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 154 | goto err_fini_buf; |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 155 | } |
| 156 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 157 | exynos_gem_obj->buffer = buf; |
| 158 | |
| 159 | /* set memory type and cache attribute from user side. */ |
| 160 | exynos_gem_obj->flags = flags; |
| 161 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 162 | ret = exynos_drm_alloc_buf(dev, buf, flags); |
YoungJun Cho | c58c159 | 2013-07-01 11:17:12 +0900 | [diff] [blame] | 163 | if (ret < 0) |
| 164 | goto err_gem_fini; |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 165 | |
| 166 | return exynos_gem_obj; |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 167 | |
YoungJun Cho | c58c159 | 2013-07-01 11:17:12 +0900 | [diff] [blame] | 168 | err_gem_fini: |
| 169 | drm_gem_object_release(&exynos_gem_obj->base); |
| 170 | kfree(exynos_gem_obj); |
Inki Dae | dcf9af8 | 2012-04-03 21:27:58 +0900 | [diff] [blame] | 171 | err_fini_buf: |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 172 | exynos_drm_fini_buf(dev, buf); |
| 173 | return ERR_PTR(ret); |
Inki Dae | f088d5a | 2011-11-12 14:51:23 +0900 | [diff] [blame] | 174 | } |
| 175 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 176 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 177 | struct drm_file *file_priv) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 178 | { |
| 179 | struct drm_exynos_gem_create *args = data; |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 180 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 181 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 182 | |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 183 | exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 184 | if (IS_ERR(exynos_gem_obj)) |
| 185 | return PTR_ERR(exynos_gem_obj); |
| 186 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 187 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| 188 | &args->handle); |
| 189 | if (ret) { |
| 190 | exynos_drm_gem_destroy(exynos_gem_obj); |
| 191 | return ret; |
| 192 | } |
| 193 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 194 | return 0; |
| 195 | } |
| 196 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 197 | 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] | 198 | unsigned int gem_handle, |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 199 | struct drm_file *filp) |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 200 | { |
| 201 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 202 | struct drm_gem_object *obj; |
| 203 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 204 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 205 | if (!obj) { |
| 206 | DRM_ERROR("failed to lookup gem object.\n"); |
| 207 | return ERR_PTR(-EINVAL); |
| 208 | } |
| 209 | |
| 210 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 211 | |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 212 | return &exynos_gem_obj->buffer->dma_addr; |
| 213 | } |
| 214 | |
| 215 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, |
| 216 | unsigned int gem_handle, |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 217 | struct drm_file *filp) |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 218 | { |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 219 | struct drm_gem_object *obj; |
| 220 | |
Inki Dae | d87342c | 2012-11-03 21:53:24 -0700 | [diff] [blame] | 221 | obj = drm_gem_object_lookup(dev, filp, gem_handle); |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 222 | if (!obj) { |
| 223 | DRM_ERROR("failed to lookup gem object.\n"); |
| 224 | return; |
| 225 | } |
| 226 | |
Inki Dae | f0b1bda | 2012-03-16 18:47:06 +0900 | [diff] [blame] | 227 | drm_gem_object_unreference_unlocked(obj); |
| 228 | |
| 229 | /* |
| 230 | * decrease obj->refcount one more time because we has already |
| 231 | * increased it at exynos_drm_gem_get_dma_addr(). |
| 232 | */ |
| 233 | drm_gem_object_unreference_unlocked(obj); |
| 234 | } |
| 235 | |
Inki Dae | 832316c | 2014-09-18 14:19:01 +0900 | [diff] [blame] | 236 | int exynos_drm_gem_mmap_buffer(struct exynos_drm_gem_obj *exynos_gem_obj, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 237 | struct vm_area_struct *vma) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 238 | { |
Inki Dae | 832316c | 2014-09-18 14:19:01 +0900 | [diff] [blame] | 239 | struct drm_device *drm_dev = exynos_gem_obj->base.dev; |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 240 | struct exynos_drm_gem_buf *buffer; |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 241 | unsigned long vm_size; |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 242 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 243 | |
Inki Dae | 832316c | 2014-09-18 14:19:01 +0900 | [diff] [blame] | 244 | vma->vm_flags &= ~VM_PFNMAP; |
| 245 | vma->vm_pgoff = 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 246 | |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 247 | vm_size = vma->vm_end - vma->vm_start; |
Inki Dae | 2b35892 | 2012-03-16 18:47:05 +0900 | [diff] [blame] | 248 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 249 | /* |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 250 | * a buffer contains information to physically continuous memory |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 251 | * allocated by user request or at framebuffer creation. |
| 252 | */ |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 253 | buffer = exynos_gem_obj->buffer; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 254 | |
| 255 | /* check if user-requested size is valid. */ |
Inki Dae | 2c87112 | 2011-11-12 15:23:32 +0900 | [diff] [blame] | 256 | if (vm_size > buffer->size) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 257 | return -EINVAL; |
| 258 | |
Inki Dae | 4744ad2 | 2012-12-07 17:51:27 +0900 | [diff] [blame] | 259 | ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages, |
Inki Dae | 0519f9a | 2012-10-20 07:53:42 -0700 | [diff] [blame] | 260 | buffer->dma_addr, buffer->size, |
| 261 | &buffer->dma_attrs); |
Inki Dae | 5b07c66 | 2012-11-08 21:52:54 +0900 | [diff] [blame] | 262 | if (ret < 0) { |
| 263 | DRM_ERROR("failed to mmap.\n"); |
| 264 | return ret; |
| 265 | } |
| 266 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 267 | return 0; |
| 268 | } |
| 269 | |
Inki Dae | 40cd7e0 | 2012-05-04 15:51:17 +0900 | [diff] [blame] | 270 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
| 271 | struct drm_file *file_priv) |
| 272 | { struct exynos_drm_gem_obj *exynos_gem_obj; |
| 273 | struct drm_exynos_gem_info *args = data; |
| 274 | struct drm_gem_object *obj; |
| 275 | |
| 276 | mutex_lock(&dev->struct_mutex); |
| 277 | |
| 278 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
| 279 | if (!obj) { |
| 280 | DRM_ERROR("failed to lookup gem object.\n"); |
| 281 | mutex_unlock(&dev->struct_mutex); |
| 282 | return -EINVAL; |
| 283 | } |
| 284 | |
| 285 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 286 | |
| 287 | args->flags = exynos_gem_obj->flags; |
| 288 | args->size = exynos_gem_obj->size; |
| 289 | |
| 290 | drm_gem_object_unreference(obj); |
| 291 | mutex_unlock(&dev->struct_mutex); |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
Inki Dae | 2a3098f | 2012-11-04 05:48:52 -0800 | [diff] [blame] | 296 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma) |
| 297 | { |
| 298 | struct vm_area_struct *vma_copy; |
| 299 | |
| 300 | vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); |
| 301 | if (!vma_copy) |
| 302 | return NULL; |
| 303 | |
| 304 | if (vma->vm_ops && vma->vm_ops->open) |
| 305 | vma->vm_ops->open(vma); |
| 306 | |
| 307 | if (vma->vm_file) |
| 308 | get_file(vma->vm_file); |
| 309 | |
| 310 | memcpy(vma_copy, vma, sizeof(*vma)); |
| 311 | |
| 312 | vma_copy->vm_mm = NULL; |
| 313 | vma_copy->vm_next = NULL; |
| 314 | vma_copy->vm_prev = NULL; |
| 315 | |
| 316 | return vma_copy; |
| 317 | } |
| 318 | |
| 319 | void exynos_gem_put_vma(struct vm_area_struct *vma) |
| 320 | { |
| 321 | if (!vma) |
| 322 | return; |
| 323 | |
| 324 | if (vma->vm_ops && vma->vm_ops->close) |
| 325 | vma->vm_ops->close(vma); |
| 326 | |
| 327 | if (vma->vm_file) |
| 328 | fput(vma->vm_file); |
| 329 | |
| 330 | kfree(vma); |
| 331 | } |
| 332 | |
| 333 | int exynos_gem_get_pages_from_userptr(unsigned long start, |
| 334 | unsigned int npages, |
| 335 | struct page **pages, |
| 336 | struct vm_area_struct *vma) |
| 337 | { |
| 338 | int get_npages; |
| 339 | |
| 340 | /* the memory region mmaped with VM_PFNMAP. */ |
| 341 | if (vma_is_io(vma)) { |
| 342 | unsigned int i; |
| 343 | |
| 344 | for (i = 0; i < npages; ++i, start += PAGE_SIZE) { |
| 345 | unsigned long pfn; |
| 346 | int ret = follow_pfn(vma, start, &pfn); |
| 347 | if (ret) |
| 348 | return ret; |
| 349 | |
| 350 | pages[i] = pfn_to_page(pfn); |
| 351 | } |
| 352 | |
| 353 | if (i != npages) { |
| 354 | DRM_ERROR("failed to get user_pages.\n"); |
| 355 | return -EINVAL; |
| 356 | } |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | get_npages = get_user_pages(current, current->mm, start, |
| 362 | npages, 1, 1, pages, NULL); |
| 363 | get_npages = max(get_npages, 0); |
| 364 | if (get_npages != npages) { |
| 365 | DRM_ERROR("failed to get user_pages.\n"); |
| 366 | while (get_npages) |
| 367 | put_page(pages[--get_npages]); |
| 368 | return -EFAULT; |
| 369 | } |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | void exynos_gem_put_pages_to_userptr(struct page **pages, |
| 375 | unsigned int npages, |
| 376 | struct vm_area_struct *vma) |
| 377 | { |
| 378 | if (!vma_is_io(vma)) { |
| 379 | unsigned int i; |
| 380 | |
| 381 | for (i = 0; i < npages; i++) { |
| 382 | set_page_dirty_lock(pages[i]); |
| 383 | |
| 384 | /* |
| 385 | * undo the reference we took when populating |
| 386 | * the table. |
| 387 | */ |
| 388 | put_page(pages[i]); |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, |
| 394 | struct sg_table *sgt, |
| 395 | enum dma_data_direction dir) |
| 396 | { |
| 397 | int nents; |
| 398 | |
| 399 | mutex_lock(&drm_dev->struct_mutex); |
| 400 | |
| 401 | nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); |
| 402 | if (!nents) { |
| 403 | DRM_ERROR("failed to map sgl with dma.\n"); |
| 404 | mutex_unlock(&drm_dev->struct_mutex); |
| 405 | return nents; |
| 406 | } |
| 407 | |
| 408 | mutex_unlock(&drm_dev->struct_mutex); |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, |
| 413 | struct sg_table *sgt, |
| 414 | enum dma_data_direction dir) |
| 415 | { |
| 416 | dma_unmap_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir); |
| 417 | } |
| 418 | |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 419 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 420 | { |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 421 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 422 | struct exynos_drm_gem_buf *buf; |
| 423 | |
Inki Dae | b2df26c | 2012-04-23 21:01:28 +0900 | [diff] [blame] | 424 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 425 | buf = exynos_gem_obj->buffer; |
| 426 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 427 | exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 431 | struct drm_device *dev, |
| 432 | struct drm_mode_create_dumb *args) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 433 | { |
| 434 | struct exynos_drm_gem_obj *exynos_gem_obj; |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 435 | int ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 436 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 437 | /* |
Masanari Iida | c6b78bc | 2013-10-24 16:02:57 +0900 | [diff] [blame] | 438 | * allocate memory to be used for framebuffer. |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 439 | * - this callback would be called by user application |
| 440 | * with DRM_IOCTL_MODE_CREATE_DUMB command. |
| 441 | */ |
| 442 | |
Cooper Yuan | 3fd6b69 | 2012-06-29 11:49:45 +0900 | [diff] [blame] | 443 | args->pitch = args->width * ((args->bpp + 7) / 8); |
Inki Dae | 7da5907 | 2012-08-17 15:24:03 +0900 | [diff] [blame] | 444 | args->size = args->pitch * args->height; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 445 | |
Rahul Sharma | 122beea | 2014-05-07 17:21:29 +0530 | [diff] [blame] | 446 | if (is_drm_iommu_supported(dev)) { |
Vikas Sajjan | 3fec453 | 2013-08-23 12:05:06 +0530 | [diff] [blame] | 447 | exynos_gem_obj = exynos_drm_gem_create(dev, |
Rahul Sharma | 122beea | 2014-05-07 17:21:29 +0530 | [diff] [blame] | 448 | EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC, |
| 449 | args->size); |
| 450 | } else { |
| 451 | exynos_gem_obj = exynos_drm_gem_create(dev, |
| 452 | EXYNOS_BO_CONTIG | EXYNOS_BO_WC, |
| 453 | args->size); |
Vikas Sajjan | 3fec453 | 2013-08-23 12:05:06 +0530 | [diff] [blame] | 454 | } |
| 455 | |
Rahul Sharma | 122beea | 2014-05-07 17:21:29 +0530 | [diff] [blame] | 456 | if (IS_ERR(exynos_gem_obj)) { |
| 457 | dev_warn(dev->dev, "FB allocation failed.\n"); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 458 | return PTR_ERR(exynos_gem_obj); |
Rahul Sharma | 122beea | 2014-05-07 17:21:29 +0530 | [diff] [blame] | 459 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 460 | |
Joonyoung Shim | 2364839 | 2011-12-13 14:39:13 +0900 | [diff] [blame] | 461 | ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| 462 | &args->handle); |
| 463 | if (ret) { |
| 464 | exynos_drm_gem_destroy(exynos_gem_obj); |
| 465 | return ret; |
| 466 | } |
| 467 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, |
Joonyoung Shim | ee5e770 | 2011-12-13 14:20:23 +0900 | [diff] [blame] | 472 | struct drm_device *dev, uint32_t handle, |
| 473 | uint64_t *offset) |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 474 | { |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 475 | struct drm_gem_object *obj; |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 476 | int ret = 0; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 477 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 478 | mutex_lock(&dev->struct_mutex); |
| 479 | |
| 480 | /* |
| 481 | * get offset of memory allocated for drm framebuffer. |
| 482 | * - this callback would be called by user application |
| 483 | * with DRM_IOCTL_MODE_MAP_DUMB command. |
| 484 | */ |
| 485 | |
| 486 | obj = drm_gem_object_lookup(dev, file_priv, handle); |
| 487 | if (!obj) { |
| 488 | DRM_ERROR("failed to lookup gem object.\n"); |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 489 | ret = -EINVAL; |
| 490 | goto unlock; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 491 | } |
| 492 | |
David Herrmann | 0de2397 | 2013-07-24 21:07:52 +0200 | [diff] [blame] | 493 | ret = drm_gem_create_mmap_offset(obj); |
| 494 | if (ret) |
| 495 | goto out; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 496 | |
David Herrmann | 0de2397 | 2013-07-24 21:07:52 +0200 | [diff] [blame] | 497 | *offset = drm_vma_node_offset_addr(&obj->vma_node); |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 498 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
| 499 | |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 500 | out: |
| 501 | drm_gem_object_unreference(obj); |
| 502 | unlock: |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 503 | mutex_unlock(&dev->struct_mutex); |
Joonyoung Shim | 2d91cf1 | 2011-12-13 14:32:24 +0900 | [diff] [blame] | 504 | return ret; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 508 | { |
| 509 | struct drm_gem_object *obj = vma->vm_private_data; |
Joonyoung Shim | 0e9a2ee | 2015-07-28 17:53:19 +0900 | [diff] [blame] | 510 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| 511 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
| 512 | unsigned long pfn; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 513 | pgoff_t page_offset; |
| 514 | int ret; |
| 515 | |
| 516 | page_offset = ((unsigned long)vmf->virtual_address - |
| 517 | vma->vm_start) >> PAGE_SHIFT; |
| 518 | |
Joonyoung Shim | 0e9a2ee | 2015-07-28 17:53:19 +0900 | [diff] [blame] | 519 | if (page_offset >= (buf->size >> PAGE_SHIFT)) { |
| 520 | DRM_ERROR("invalid page offset\n"); |
| 521 | ret = -EINVAL; |
| 522 | goto out; |
| 523 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 524 | |
Joonyoung Shim | 0e9a2ee | 2015-07-28 17:53:19 +0900 | [diff] [blame] | 525 | pfn = page_to_pfn(buf->pages[page_offset]); |
| 526 | ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); |
| 527 | |
| 528 | out: |
Joonyoung Shim | 23597e2 | 2015-07-28 17:53:17 +0900 | [diff] [blame] | 529 | switch (ret) { |
| 530 | case 0: |
| 531 | case -ERESTARTSYS: |
| 532 | case -EINTR: |
| 533 | return VM_FAULT_NOPAGE; |
| 534 | case -ENOMEM: |
| 535 | return VM_FAULT_OOM; |
| 536 | default: |
| 537 | return VM_FAULT_SIGBUS; |
| 538 | } |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
| 542 | { |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 543 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 544 | struct drm_gem_object *obj; |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 545 | int ret; |
| 546 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 547 | /* set vm_area_struct. */ |
| 548 | ret = drm_gem_mmap(filp, vma); |
| 549 | if (ret < 0) { |
| 550 | DRM_ERROR("failed to mmap.\n"); |
| 551 | return ret; |
| 552 | } |
| 553 | |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 554 | obj = vma->vm_private_data; |
| 555 | exynos_gem_obj = to_exynos_gem_obj(obj); |
| 556 | |
Joonyoung Shim | 211b887 | 2015-08-16 14:16:49 +0900 | [diff] [blame] | 557 | DRM_DEBUG_KMS("flags = 0x%x\n", exynos_gem_obj->flags); |
| 558 | |
| 559 | /* non-cachable as default. */ |
| 560 | if (exynos_gem_obj->flags & EXYNOS_BO_CACHABLE) |
| 561 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
| 562 | else if (exynos_gem_obj->flags & EXYNOS_BO_WC) |
| 563 | vma->vm_page_prot = |
| 564 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); |
| 565 | else |
| 566 | vma->vm_page_prot = |
| 567 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); |
Inki Dae | c01d73fa | 2012-04-23 19:26:34 +0900 | [diff] [blame] | 568 | |
Inki Dae | 832316c | 2014-09-18 14:19:01 +0900 | [diff] [blame] | 569 | ret = exynos_drm_gem_mmap_buffer(exynos_gem_obj, vma); |
| 570 | if (ret) |
| 571 | goto err_close_vm; |
| 572 | |
| 573 | return ret; |
| 574 | |
| 575 | err_close_vm: |
| 576 | drm_gem_vm_close(vma); |
| 577 | drm_gem_free_mmap_offset(obj); |
| 578 | |
Inki Dae | 1c248b7 | 2011-10-04 19:19:01 +0900 | [diff] [blame] | 579 | return ret; |
| 580 | } |
Joonyoung Shim | 01ed50d | 2015-08-16 14:33:08 +0900 | [diff] [blame^] | 581 | |
| 582 | /* low-level interface prime helpers */ |
| 583 | struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj) |
| 584 | { |
| 585 | struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| 586 | struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
| 587 | int npages; |
| 588 | |
| 589 | npages = buf->size >> PAGE_SHIFT; |
| 590 | |
| 591 | return drm_prime_pages_to_sg(buf->pages, npages); |
| 592 | } |
| 593 | |
| 594 | struct drm_gem_object * |
| 595 | exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, |
| 596 | struct dma_buf_attachment *attach, |
| 597 | struct sg_table *sgt) |
| 598 | { |
| 599 | struct exynos_drm_gem_obj *exynos_gem_obj; |
| 600 | struct exynos_drm_gem_buf *buf; |
| 601 | int npages; |
| 602 | int ret; |
| 603 | |
| 604 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); |
| 605 | if (!buf) |
| 606 | return ERR_PTR(-ENOMEM); |
| 607 | |
| 608 | buf->size = attach->dmabuf->size; |
| 609 | buf->dma_addr = sg_dma_address(sgt->sgl); |
| 610 | |
| 611 | npages = buf->size >> PAGE_SHIFT; |
| 612 | buf->pages = drm_malloc_ab(npages, sizeof(struct page *)); |
| 613 | if (!buf->pages) { |
| 614 | ret = -ENOMEM; |
| 615 | goto err; |
| 616 | } |
| 617 | |
| 618 | ret = drm_prime_sg_to_page_addr_arrays(sgt, buf->pages, NULL, npages); |
| 619 | if (ret < 0) |
| 620 | goto err_free_large; |
| 621 | |
| 622 | exynos_gem_obj = exynos_drm_gem_init(dev, buf->size); |
| 623 | if (IS_ERR(exynos_gem_obj)) { |
| 624 | ret = PTR_ERR(exynos_gem_obj); |
| 625 | goto err; |
| 626 | } |
| 627 | |
| 628 | if (sgt->nents == 1) { |
| 629 | /* always physically continuous memory if sgt->nents is 1. */ |
| 630 | exynos_gem_obj->flags |= EXYNOS_BO_CONTIG; |
| 631 | } else { |
| 632 | /* |
| 633 | * this case could be CONTIG or NONCONTIG type but for now |
| 634 | * sets NONCONTIG. |
| 635 | * TODO. we have to find a way that exporter can notify |
| 636 | * the type of its own buffer to importer. |
| 637 | */ |
| 638 | exynos_gem_obj->flags |= EXYNOS_BO_NONCONTIG; |
| 639 | } |
| 640 | |
| 641 | return &exynos_gem_obj->base; |
| 642 | |
| 643 | err_free_large: |
| 644 | drm_free_large(buf->pages); |
| 645 | err: |
| 646 | kfree(buf); |
| 647 | return ERR_PTR(ret); |
| 648 | } |
| 649 | |
| 650 | void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj) |
| 651 | { |
| 652 | return NULL; |
| 653 | } |
| 654 | |
| 655 | void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) |
| 656 | { |
| 657 | /* Nothing to do */ |
| 658 | } |