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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 | ||
f9aa76a8 DA |
26 | static const struct drm_framebuffer_funcs cirrus_fb_funcs = { |
27 | .destroy = cirrus_user_framebuffer_destroy, | |
f9aa76a8 DA |
28 | }; |
29 | ||
30 | int cirrus_framebuffer_init(struct drm_device *dev, | |
31 | struct cirrus_framebuffer *gfb, | |
32 | struct drm_mode_fb_cmd2 *mode_cmd, | |
33 | struct drm_gem_object *obj) | |
34 | { | |
35 | int ret; | |
36 | ||
c7d73f6a DV |
37 | drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); |
38 | gfb->obj = obj; | |
f9aa76a8 DA |
39 | ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs); |
40 | if (ret) { | |
41 | DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); | |
42 | return ret; | |
43 | } | |
f9aa76a8 DA |
44 | return 0; |
45 | } | |
46 | ||
47 | static struct drm_framebuffer * | |
48 | cirrus_user_framebuffer_create(struct drm_device *dev, | |
49 | struct drm_file *filp, | |
50 | struct drm_mode_fb_cmd2 *mode_cmd) | |
51 | { | |
52 | struct drm_gem_object *obj; | |
53 | struct cirrus_framebuffer *cirrus_fb; | |
54 | int ret; | |
55 | u32 bpp, depth; | |
56 | ||
57 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); | |
58 | /* cirrus can't handle > 24bpp framebuffers at all */ | |
59 | if (bpp > 24) | |
60 | return ERR_PTR(-EINVAL); | |
61 | ||
62 | obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); | |
63 | if (obj == NULL) | |
64 | return ERR_PTR(-ENOENT); | |
65 | ||
66 | cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL); | |
67 | if (!cirrus_fb) { | |
68 | drm_gem_object_unreference_unlocked(obj); | |
69 | return ERR_PTR(-ENOMEM); | |
70 | } | |
71 | ||
72 | ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj); | |
73 | if (ret) { | |
74 | drm_gem_object_unreference_unlocked(obj); | |
75 | kfree(cirrus_fb); | |
76 | return ERR_PTR(ret); | |
77 | } | |
78 | return &cirrus_fb->base; | |
79 | } | |
80 | ||
81 | static const struct drm_mode_config_funcs cirrus_mode_funcs = { | |
82 | .fb_create = cirrus_user_framebuffer_create, | |
83 | }; | |
84 | ||
85 | /* Unmap the framebuffer from the core and release the memory */ | |
86 | static void cirrus_vram_fini(struct cirrus_device *cdev) | |
87 | { | |
88 | iounmap(cdev->rmmio); | |
89 | cdev->rmmio = NULL; | |
90 | if (cdev->mc.vram_base) | |
91 | release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size); | |
92 | } | |
93 | ||
94 | /* Map the framebuffer from the card and configure the core */ | |
95 | static int cirrus_vram_init(struct cirrus_device *cdev) | |
96 | { | |
97 | /* BAR 0 is VRAM */ | |
98 | cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0); | |
99 | /* We have 4MB of VRAM */ | |
100 | cdev->mc.vram_size = 4 * 1024 * 1024; | |
101 | ||
102 | if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size, | |
103 | "cirrusdrmfb_vram")) { | |
104 | DRM_ERROR("can't reserve VRAM\n"); | |
105 | return -ENXIO; | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Our emulated hardware has two sets of memory. One is video RAM and can | |
113 | * simply be used as a linear framebuffer - the other provides mmio access | |
114 | * to the display registers. The latter can also be accessed via IO port | |
115 | * access, but we map the range and use mmio to program them instead | |
116 | */ | |
117 | ||
118 | int cirrus_device_init(struct cirrus_device *cdev, | |
119 | struct drm_device *ddev, | |
120 | struct pci_dev *pdev, uint32_t flags) | |
121 | { | |
122 | int ret; | |
123 | ||
124 | cdev->dev = ddev; | |
125 | cdev->flags = flags; | |
126 | ||
127 | /* Hardcode the number of CRTCs to 1 */ | |
128 | cdev->num_crtc = 1; | |
129 | ||
130 | /* BAR 0 is the framebuffer, BAR 1 contains registers */ | |
131 | cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1); | |
132 | cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1); | |
133 | ||
134 | if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size, | |
135 | "cirrusdrmfb_mmio")) { | |
136 | DRM_ERROR("can't reserve mmio registers\n"); | |
137 | return -ENOMEM; | |
138 | } | |
139 | ||
140 | cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size); | |
141 | ||
142 | if (cdev->rmmio == NULL) | |
143 | return -ENOMEM; | |
144 | ||
145 | ret = cirrus_vram_init(cdev); | |
146 | if (ret) { | |
147 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | void cirrus_device_fini(struct cirrus_device *cdev) | |
155 | { | |
156 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); | |
157 | cirrus_vram_fini(cdev); | |
158 | } | |
159 | ||
160 | /* | |
161 | * Functions here will be called by the core once it's bound the driver to | |
162 | * a PCI device | |
163 | */ | |
164 | ||
165 | int cirrus_driver_load(struct drm_device *dev, unsigned long flags) | |
166 | { | |
167 | struct cirrus_device *cdev; | |
168 | int r; | |
169 | ||
170 | cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL); | |
171 | if (cdev == NULL) | |
172 | return -ENOMEM; | |
173 | dev->dev_private = (void *)cdev; | |
174 | ||
175 | r = cirrus_device_init(cdev, dev, dev->pdev, flags); | |
176 | if (r) { | |
177 | dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); | |
178 | goto out; | |
179 | } | |
180 | ||
181 | r = cirrus_mm_init(cdev); | |
182 | if (r) | |
183 | dev_err(&dev->pdev->dev, "fatal err on mm init\n"); | |
184 | ||
185 | r = cirrus_modeset_init(cdev); | |
186 | if (r) | |
187 | dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); | |
188 | ||
189 | dev->mode_config.funcs = (void *)&cirrus_mode_funcs; | |
190 | out: | |
191 | if (r) | |
192 | cirrus_driver_unload(dev); | |
193 | return r; | |
194 | } | |
195 | ||
196 | int cirrus_driver_unload(struct drm_device *dev) | |
197 | { | |
198 | struct cirrus_device *cdev = dev->dev_private; | |
199 | ||
200 | if (cdev == NULL) | |
201 | return 0; | |
202 | cirrus_modeset_fini(cdev); | |
203 | cirrus_mm_fini(cdev); | |
204 | cirrus_device_fini(cdev); | |
205 | kfree(cdev); | |
206 | dev->dev_private = NULL; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | int cirrus_gem_create(struct drm_device *dev, | |
211 | u32 size, bool iskernel, | |
212 | struct drm_gem_object **obj) | |
213 | { | |
214 | struct cirrus_bo *cirrusbo; | |
215 | int ret; | |
216 | ||
217 | *obj = NULL; | |
218 | ||
219 | size = roundup(size, PAGE_SIZE); | |
220 | if (size == 0) | |
221 | return -EINVAL; | |
222 | ||
223 | ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo); | |
224 | if (ret) { | |
225 | if (ret != -ERESTARTSYS) | |
226 | DRM_ERROR("failed to allocate GEM object\n"); | |
227 | return ret; | |
228 | } | |
229 | *obj = &cirrusbo->gem; | |
230 | return 0; | |
231 | } | |
232 | ||
233 | int cirrus_dumb_create(struct drm_file *file, | |
234 | struct drm_device *dev, | |
235 | struct drm_mode_create_dumb *args) | |
236 | { | |
237 | int ret; | |
238 | struct drm_gem_object *gobj; | |
239 | u32 handle; | |
240 | ||
241 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
242 | args->size = args->pitch * args->height; | |
243 | ||
244 | ret = cirrus_gem_create(dev, args->size, false, | |
245 | &gobj); | |
246 | if (ret) | |
247 | return ret; | |
248 | ||
249 | ret = drm_gem_handle_create(file, gobj, &handle); | |
250 | drm_gem_object_unreference_unlocked(gobj); | |
251 | if (ret) | |
252 | return ret; | |
253 | ||
254 | args->handle = handle; | |
255 | return 0; | |
256 | } | |
257 | ||
258 | int cirrus_dumb_destroy(struct drm_file *file, | |
259 | struct drm_device *dev, | |
260 | uint32_t handle) | |
261 | { | |
262 | return drm_gem_handle_delete(file, handle); | |
263 | } | |
264 | ||
265 | int cirrus_gem_init_object(struct drm_gem_object *obj) | |
266 | { | |
267 | BUG(); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | void cirrus_bo_unref(struct cirrus_bo **bo) | |
272 | { | |
273 | struct ttm_buffer_object *tbo; | |
274 | ||
275 | if ((*bo) == NULL) | |
276 | return; | |
277 | ||
278 | tbo = &((*bo)->bo); | |
279 | ttm_bo_unref(&tbo); | |
280 | if (tbo == NULL) | |
281 | *bo = NULL; | |
282 | ||
283 | } | |
284 | ||
285 | void cirrus_gem_free_object(struct drm_gem_object *obj) | |
286 | { | |
287 | struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj); | |
288 | ||
289 | if (!cirrus_bo) | |
290 | return; | |
291 | cirrus_bo_unref(&cirrus_bo); | |
292 | } | |
293 | ||
294 | ||
295 | static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo) | |
296 | { | |
297 | return bo->bo.addr_space_offset; | |
298 | } | |
299 | ||
300 | int | |
301 | cirrus_dumb_mmap_offset(struct drm_file *file, | |
302 | struct drm_device *dev, | |
303 | uint32_t handle, | |
304 | uint64_t *offset) | |
305 | { | |
306 | struct drm_gem_object *obj; | |
307 | int ret; | |
308 | struct cirrus_bo *bo; | |
309 | ||
310 | mutex_lock(&dev->struct_mutex); | |
311 | obj = drm_gem_object_lookup(dev, file, handle); | |
312 | if (obj == NULL) { | |
313 | ret = -ENOENT; | |
314 | goto out_unlock; | |
315 | } | |
316 | ||
317 | bo = gem_to_cirrus_bo(obj); | |
318 | *offset = cirrus_bo_mmap_offset(bo); | |
319 | ||
320 | drm_gem_object_unreference(obj); | |
321 | ret = 0; | |
322 | out_unlock: | |
323 | mutex_unlock(&dev->struct_mutex); | |
324 | return ret; | |
325 | ||
326 | } |