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f9aa76a8 DA |
1 | /* |
2 | * Copyright 2012 Red Hat | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General | |
5 | * Public License version 2. See the file COPYING in the main | |
6 | * directory of this archive for more details. | |
7 | * | |
8 | * Authors: Matthew Garrett | |
9 | * Dave Airlie | |
10 | */ | |
760285e7 DH |
11 | #include <drm/drmP.h> |
12 | #include <drm/drm_crtc_helper.h> | |
f9aa76a8 DA |
13 | |
14 | #include "cirrus_drv.h" | |
15 | ||
16 | ||
17 | static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb) | |
18 | { | |
19 | struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb); | |
20 | if (cirrus_fb->obj) | |
21 | drm_gem_object_unreference_unlocked(cirrus_fb->obj); | |
22 | drm_framebuffer_cleanup(fb); | |
23 | kfree(fb); | |
24 | } | |
25 | ||
26 | static int cirrus_user_framebuffer_create_handle(struct drm_framebuffer *fb, | |
27 | struct drm_file *file_priv, | |
28 | unsigned int *handle) | |
29 | { | |
30 | return 0; | |
31 | } | |
32 | ||
33 | static const struct drm_framebuffer_funcs cirrus_fb_funcs = { | |
34 | .destroy = cirrus_user_framebuffer_destroy, | |
35 | .create_handle = cirrus_user_framebuffer_create_handle, | |
36 | }; | |
37 | ||
38 | int cirrus_framebuffer_init(struct drm_device *dev, | |
39 | struct cirrus_framebuffer *gfb, | |
40 | struct drm_mode_fb_cmd2 *mode_cmd, | |
41 | struct drm_gem_object *obj) | |
42 | { | |
43 | int ret; | |
44 | ||
45 | ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs); | |
46 | if (ret) { | |
47 | DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); | |
48 | return ret; | |
49 | } | |
50 | drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); | |
51 | gfb->obj = obj; | |
52 | return 0; | |
53 | } | |
54 | ||
55 | static struct drm_framebuffer * | |
56 | cirrus_user_framebuffer_create(struct drm_device *dev, | |
57 | struct drm_file *filp, | |
58 | struct drm_mode_fb_cmd2 *mode_cmd) | |
59 | { | |
60 | struct drm_gem_object *obj; | |
61 | struct cirrus_framebuffer *cirrus_fb; | |
62 | int ret; | |
63 | u32 bpp, depth; | |
64 | ||
65 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); | |
66 | /* cirrus can't handle > 24bpp framebuffers at all */ | |
67 | if (bpp > 24) | |
68 | return ERR_PTR(-EINVAL); | |
69 | ||
70 | obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); | |
71 | if (obj == NULL) | |
72 | return ERR_PTR(-ENOENT); | |
73 | ||
74 | cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL); | |
75 | if (!cirrus_fb) { | |
76 | drm_gem_object_unreference_unlocked(obj); | |
77 | return ERR_PTR(-ENOMEM); | |
78 | } | |
79 | ||
80 | ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj); | |
81 | if (ret) { | |
82 | drm_gem_object_unreference_unlocked(obj); | |
83 | kfree(cirrus_fb); | |
84 | return ERR_PTR(ret); | |
85 | } | |
86 | return &cirrus_fb->base; | |
87 | } | |
88 | ||
89 | static const struct drm_mode_config_funcs cirrus_mode_funcs = { | |
90 | .fb_create = cirrus_user_framebuffer_create, | |
91 | }; | |
92 | ||
93 | /* Unmap the framebuffer from the core and release the memory */ | |
94 | static void cirrus_vram_fini(struct cirrus_device *cdev) | |
95 | { | |
96 | iounmap(cdev->rmmio); | |
97 | cdev->rmmio = NULL; | |
98 | if (cdev->mc.vram_base) | |
99 | release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size); | |
100 | } | |
101 | ||
102 | /* Map the framebuffer from the card and configure the core */ | |
103 | static int cirrus_vram_init(struct cirrus_device *cdev) | |
104 | { | |
105 | /* BAR 0 is VRAM */ | |
106 | cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0); | |
107 | /* We have 4MB of VRAM */ | |
108 | cdev->mc.vram_size = 4 * 1024 * 1024; | |
109 | ||
110 | if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size, | |
111 | "cirrusdrmfb_vram")) { | |
112 | DRM_ERROR("can't reserve VRAM\n"); | |
113 | return -ENXIO; | |
114 | } | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | /* | |
120 | * Our emulated hardware has two sets of memory. One is video RAM and can | |
121 | * simply be used as a linear framebuffer - the other provides mmio access | |
122 | * to the display registers. The latter can also be accessed via IO port | |
123 | * access, but we map the range and use mmio to program them instead | |
124 | */ | |
125 | ||
126 | int cirrus_device_init(struct cirrus_device *cdev, | |
127 | struct drm_device *ddev, | |
128 | struct pci_dev *pdev, uint32_t flags) | |
129 | { | |
130 | int ret; | |
131 | ||
132 | cdev->dev = ddev; | |
133 | cdev->flags = flags; | |
134 | ||
135 | /* Hardcode the number of CRTCs to 1 */ | |
136 | cdev->num_crtc = 1; | |
137 | ||
138 | /* BAR 0 is the framebuffer, BAR 1 contains registers */ | |
139 | cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1); | |
140 | cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1); | |
141 | ||
142 | if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size, | |
143 | "cirrusdrmfb_mmio")) { | |
144 | DRM_ERROR("can't reserve mmio registers\n"); | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
148 | cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size); | |
149 | ||
150 | if (cdev->rmmio == NULL) | |
151 | return -ENOMEM; | |
152 | ||
153 | ret = cirrus_vram_init(cdev); | |
154 | if (ret) { | |
155 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | void cirrus_device_fini(struct cirrus_device *cdev) | |
163 | { | |
164 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); | |
165 | cirrus_vram_fini(cdev); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Functions here will be called by the core once it's bound the driver to | |
170 | * a PCI device | |
171 | */ | |
172 | ||
173 | int cirrus_driver_load(struct drm_device *dev, unsigned long flags) | |
174 | { | |
175 | struct cirrus_device *cdev; | |
176 | int r; | |
177 | ||
178 | cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL); | |
179 | if (cdev == NULL) | |
180 | return -ENOMEM; | |
181 | dev->dev_private = (void *)cdev; | |
182 | ||
183 | r = cirrus_device_init(cdev, dev, dev->pdev, flags); | |
184 | if (r) { | |
185 | dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); | |
186 | goto out; | |
187 | } | |
188 | ||
189 | r = cirrus_mm_init(cdev); | |
190 | if (r) | |
191 | dev_err(&dev->pdev->dev, "fatal err on mm init\n"); | |
192 | ||
193 | r = cirrus_modeset_init(cdev); | |
194 | if (r) | |
195 | dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); | |
196 | ||
197 | dev->mode_config.funcs = (void *)&cirrus_mode_funcs; | |
198 | out: | |
199 | if (r) | |
200 | cirrus_driver_unload(dev); | |
201 | return r; | |
202 | } | |
203 | ||
204 | int cirrus_driver_unload(struct drm_device *dev) | |
205 | { | |
206 | struct cirrus_device *cdev = dev->dev_private; | |
207 | ||
208 | if (cdev == NULL) | |
209 | return 0; | |
210 | cirrus_modeset_fini(cdev); | |
211 | cirrus_mm_fini(cdev); | |
212 | cirrus_device_fini(cdev); | |
213 | kfree(cdev); | |
214 | dev->dev_private = NULL; | |
215 | return 0; | |
216 | } | |
217 | ||
218 | int cirrus_gem_create(struct drm_device *dev, | |
219 | u32 size, bool iskernel, | |
220 | struct drm_gem_object **obj) | |
221 | { | |
222 | struct cirrus_bo *cirrusbo; | |
223 | int ret; | |
224 | ||
225 | *obj = NULL; | |
226 | ||
227 | size = roundup(size, PAGE_SIZE); | |
228 | if (size == 0) | |
229 | return -EINVAL; | |
230 | ||
231 | ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo); | |
232 | if (ret) { | |
233 | if (ret != -ERESTARTSYS) | |
234 | DRM_ERROR("failed to allocate GEM object\n"); | |
235 | return ret; | |
236 | } | |
237 | *obj = &cirrusbo->gem; | |
238 | return 0; | |
239 | } | |
240 | ||
241 | int cirrus_dumb_create(struct drm_file *file, | |
242 | struct drm_device *dev, | |
243 | struct drm_mode_create_dumb *args) | |
244 | { | |
245 | int ret; | |
246 | struct drm_gem_object *gobj; | |
247 | u32 handle; | |
248 | ||
249 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
250 | args->size = args->pitch * args->height; | |
251 | ||
252 | ret = cirrus_gem_create(dev, args->size, false, | |
253 | &gobj); | |
254 | if (ret) | |
255 | return ret; | |
256 | ||
257 | ret = drm_gem_handle_create(file, gobj, &handle); | |
258 | drm_gem_object_unreference_unlocked(gobj); | |
259 | if (ret) | |
260 | return ret; | |
261 | ||
262 | args->handle = handle; | |
263 | return 0; | |
264 | } | |
265 | ||
266 | int cirrus_dumb_destroy(struct drm_file *file, | |
267 | struct drm_device *dev, | |
268 | uint32_t handle) | |
269 | { | |
270 | return drm_gem_handle_delete(file, handle); | |
271 | } | |
272 | ||
273 | int cirrus_gem_init_object(struct drm_gem_object *obj) | |
274 | { | |
275 | BUG(); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | void cirrus_bo_unref(struct cirrus_bo **bo) | |
280 | { | |
281 | struct ttm_buffer_object *tbo; | |
282 | ||
283 | if ((*bo) == NULL) | |
284 | return; | |
285 | ||
286 | tbo = &((*bo)->bo); | |
287 | ttm_bo_unref(&tbo); | |
288 | if (tbo == NULL) | |
289 | *bo = NULL; | |
290 | ||
291 | } | |
292 | ||
293 | void cirrus_gem_free_object(struct drm_gem_object *obj) | |
294 | { | |
295 | struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj); | |
296 | ||
297 | if (!cirrus_bo) | |
298 | return; | |
299 | cirrus_bo_unref(&cirrus_bo); | |
300 | } | |
301 | ||
302 | ||
303 | static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo) | |
304 | { | |
305 | return bo->bo.addr_space_offset; | |
306 | } | |
307 | ||
308 | int | |
309 | cirrus_dumb_mmap_offset(struct drm_file *file, | |
310 | struct drm_device *dev, | |
311 | uint32_t handle, | |
312 | uint64_t *offset) | |
313 | { | |
314 | struct drm_gem_object *obj; | |
315 | int ret; | |
316 | struct cirrus_bo *bo; | |
317 | ||
318 | mutex_lock(&dev->struct_mutex); | |
319 | obj = drm_gem_object_lookup(dev, file, handle); | |
320 | if (obj == NULL) { | |
321 | ret = -ENOENT; | |
322 | goto out_unlock; | |
323 | } | |
324 | ||
325 | bo = gem_to_cirrus_bo(obj); | |
326 | *offset = cirrus_bo_mmap_offset(bo); | |
327 | ||
328 | drm_gem_object_unreference(obj); | |
329 | ret = 0; | |
330 | out_unlock: | |
331 | mutex_unlock(&dev->struct_mutex); | |
332 | return ret; | |
333 | ||
334 | } |