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414c4531 DA |
1 | /* |
2 | * Copyright 2010 Matt Turner. | |
3 | * Copyright 2012 Red Hat | |
4 | * | |
5 | * This file is subject to the terms and conditions of the GNU General | |
6 | * Public License version 2. See the file COPYING in the main | |
7 | * directory of this archive for more details. | |
8 | * | |
9 | * Authors: Matthew Garrett | |
10 | * Matt Turner | |
11 | * Dave Airlie | |
12 | */ | |
760285e7 DH |
13 | #include <drm/drmP.h> |
14 | #include <drm/drm_crtc_helper.h> | |
414c4531 DA |
15 | #include "mgag200_drv.h" |
16 | ||
17 | static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb) | |
18 | { | |
19 | struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb); | |
20 | if (mga_fb->obj) | |
21 | drm_gem_object_unreference_unlocked(mga_fb->obj); | |
22 | drm_framebuffer_cleanup(fb); | |
23 | kfree(fb); | |
24 | } | |
25 | ||
26 | static int mga_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 mga_fb_funcs = { | |
34 | .destroy = mga_user_framebuffer_destroy, | |
35 | .create_handle = mga_user_framebuffer_create_handle, | |
36 | }; | |
37 | ||
38 | int mgag200_framebuffer_init(struct drm_device *dev, | |
39 | struct mga_framebuffer *gfb, | |
40 | struct drm_mode_fb_cmd2 *mode_cmd, | |
41 | struct drm_gem_object *obj) | |
42 | { | |
43 | int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs); | |
44 | if (ret) { | |
45 | DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); | |
46 | return ret; | |
47 | } | |
48 | drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); | |
49 | gfb->obj = obj; | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static struct drm_framebuffer * | |
54 | mgag200_user_framebuffer_create(struct drm_device *dev, | |
55 | struct drm_file *filp, | |
56 | struct drm_mode_fb_cmd2 *mode_cmd) | |
57 | { | |
58 | struct drm_gem_object *obj; | |
59 | struct mga_framebuffer *mga_fb; | |
60 | int ret; | |
61 | ||
62 | obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); | |
63 | if (obj == NULL) | |
64 | return ERR_PTR(-ENOENT); | |
65 | ||
66 | mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL); | |
67 | if (!mga_fb) { | |
68 | drm_gem_object_unreference_unlocked(obj); | |
69 | return ERR_PTR(-ENOMEM); | |
70 | } | |
71 | ||
72 | ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj); | |
73 | if (ret) { | |
74 | drm_gem_object_unreference_unlocked(obj); | |
75 | kfree(mga_fb); | |
76 | return ERR_PTR(ret); | |
77 | } | |
78 | return &mga_fb->base; | |
79 | } | |
80 | ||
81 | static const struct drm_mode_config_funcs mga_mode_funcs = { | |
82 | .fb_create = mgag200_user_framebuffer_create, | |
83 | }; | |
84 | ||
85 | /* Unmap the framebuffer from the core and release the memory */ | |
86 | static void mga_vram_fini(struct mga_device *mdev) | |
87 | { | |
88 | pci_iounmap(mdev->dev->pdev, mdev->rmmio); | |
89 | mdev->rmmio = NULL; | |
90 | if (mdev->mc.vram_base) | |
91 | release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window); | |
92 | } | |
93 | ||
94 | static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem) | |
95 | { | |
96 | int offset; | |
97 | int orig; | |
98 | int test1, test2; | |
99 | int orig1, orig2; | |
100 | ||
101 | /* Probe */ | |
102 | orig = ioread16(mem); | |
103 | iowrite16(0, mem); | |
104 | ||
105 | for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) { | |
106 | orig1 = ioread8(mem + offset); | |
107 | orig2 = ioread8(mem + offset + 0x100); | |
108 | ||
109 | iowrite16(0xaa55, mem + offset); | |
110 | iowrite16(0xaa55, mem + offset + 0x100); | |
111 | ||
112 | test1 = ioread16(mem + offset); | |
113 | test2 = ioread16(mem); | |
114 | ||
115 | iowrite16(orig1, mem + offset); | |
116 | iowrite16(orig2, mem + offset + 0x100); | |
117 | ||
118 | if (test1 != 0xaa55) { | |
119 | break; | |
120 | } | |
121 | ||
122 | if (test2) { | |
123 | break; | |
124 | } | |
125 | } | |
126 | ||
127 | iowrite16(orig, mem); | |
128 | return offset - 65536; | |
129 | } | |
130 | ||
131 | /* Map the framebuffer from the card and configure the core */ | |
132 | static int mga_vram_init(struct mga_device *mdev) | |
133 | { | |
134 | void __iomem *mem; | |
135 | struct apertures_struct *aper = alloc_apertures(1); | |
136 | ||
137 | /* BAR 0 is VRAM */ | |
138 | mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0); | |
139 | mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0); | |
140 | ||
141 | aper->ranges[0].base = mdev->mc.vram_base; | |
142 | aper->ranges[0].size = mdev->mc.vram_window; | |
143 | aper->count = 1; | |
144 | ||
145 | remove_conflicting_framebuffers(aper, "mgafb", true); | |
146 | ||
147 | if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window, | |
148 | "mgadrmfb_vram")) { | |
149 | DRM_ERROR("can't reserve VRAM\n"); | |
150 | return -ENXIO; | |
151 | } | |
152 | ||
153 | mem = pci_iomap(mdev->dev->pdev, 0, 0); | |
154 | ||
155 | mdev->mc.vram_size = mga_probe_vram(mdev, mem); | |
156 | ||
157 | pci_iounmap(mdev->dev->pdev, mem); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int mgag200_device_init(struct drm_device *dev, | |
163 | uint32_t flags) | |
164 | { | |
165 | struct mga_device *mdev = dev->dev_private; | |
166 | int ret, option; | |
167 | ||
168 | mdev->type = flags; | |
169 | ||
170 | /* Hardcode the number of CRTCs to 1 */ | |
171 | mdev->num_crtc = 1; | |
172 | ||
173 | pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option); | |
174 | mdev->has_sdram = !(option & (1 << 14)); | |
175 | ||
176 | /* BAR 0 is the framebuffer, BAR 1 contains registers */ | |
177 | mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1); | |
178 | mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1); | |
179 | ||
180 | if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size, | |
181 | "mgadrmfb_mmio")) { | |
182 | DRM_ERROR("can't reserve mmio registers\n"); | |
183 | return -ENOMEM; | |
184 | } | |
185 | ||
186 | mdev->rmmio = pci_iomap(dev->pdev, 1, 0); | |
187 | if (mdev->rmmio == NULL) | |
188 | return -ENOMEM; | |
189 | ||
190 | /* stash G200 SE model number for later use */ | |
191 | if (IS_G200_SE(mdev)) | |
192 | mdev->reg_1e24 = RREG32(0x1e24); | |
193 | ||
194 | ret = mga_vram_init(mdev); | |
195 | if (ret) { | |
196 | release_mem_region(mdev->rmmio_base, mdev->rmmio_size); | |
197 | return ret; | |
198 | } | |
199 | ||
200 | mdev->bpp_shifts[0] = 0; | |
201 | mdev->bpp_shifts[1] = 1; | |
202 | mdev->bpp_shifts[2] = 0; | |
203 | mdev->bpp_shifts[3] = 2; | |
204 | return 0; | |
205 | } | |
206 | ||
207 | void mgag200_device_fini(struct mga_device *mdev) | |
208 | { | |
209 | release_mem_region(mdev->rmmio_base, mdev->rmmio_size); | |
210 | mga_vram_fini(mdev); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Functions here will be called by the core once it's bound the driver to | |
215 | * a PCI device | |
216 | */ | |
217 | ||
218 | ||
219 | int mgag200_driver_load(struct drm_device *dev, unsigned long flags) | |
220 | { | |
221 | struct mga_device *mdev; | |
222 | int r; | |
223 | ||
224 | mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL); | |
225 | if (mdev == NULL) | |
226 | return -ENOMEM; | |
227 | dev->dev_private = (void *)mdev; | |
228 | mdev->dev = dev; | |
229 | ||
230 | r = mgag200_device_init(dev, flags); | |
231 | if (r) { | |
232 | dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); | |
233 | goto out; | |
234 | } | |
235 | r = mgag200_mm_init(mdev); | |
236 | if (r) | |
237 | goto out; | |
238 | ||
239 | drm_mode_config_init(dev); | |
240 | dev->mode_config.funcs = (void *)&mga_mode_funcs; | |
241 | dev->mode_config.min_width = 0; | |
242 | dev->mode_config.min_height = 0; | |
243 | dev->mode_config.preferred_depth = 24; | |
244 | dev->mode_config.prefer_shadow = 1; | |
245 | ||
246 | r = mgag200_modeset_init(mdev); | |
247 | if (r) | |
248 | dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); | |
249 | out: | |
250 | if (r) | |
251 | mgag200_driver_unload(dev); | |
252 | return r; | |
253 | } | |
254 | ||
255 | int mgag200_driver_unload(struct drm_device *dev) | |
256 | { | |
257 | struct mga_device *mdev = dev->dev_private; | |
258 | ||
259 | if (mdev == NULL) | |
260 | return 0; | |
261 | mgag200_modeset_fini(mdev); | |
262 | mgag200_fbdev_fini(mdev); | |
263 | drm_mode_config_cleanup(dev); | |
264 | mgag200_mm_fini(mdev); | |
265 | mgag200_device_fini(mdev); | |
266 | kfree(mdev); | |
267 | dev->dev_private = NULL; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | int mgag200_gem_create(struct drm_device *dev, | |
272 | u32 size, bool iskernel, | |
273 | struct drm_gem_object **obj) | |
274 | { | |
275 | struct mgag200_bo *astbo; | |
276 | int ret; | |
277 | ||
278 | *obj = NULL; | |
279 | ||
280 | size = roundup(size, PAGE_SIZE); | |
281 | if (size == 0) | |
282 | return -EINVAL; | |
283 | ||
284 | ret = mgag200_bo_create(dev, size, 0, 0, &astbo); | |
285 | if (ret) { | |
286 | if (ret != -ERESTARTSYS) | |
287 | DRM_ERROR("failed to allocate GEM object\n"); | |
288 | return ret; | |
289 | } | |
290 | *obj = &astbo->gem; | |
291 | return 0; | |
292 | } | |
293 | ||
294 | int mgag200_dumb_create(struct drm_file *file, | |
295 | struct drm_device *dev, | |
296 | struct drm_mode_create_dumb *args) | |
297 | { | |
298 | int ret; | |
299 | struct drm_gem_object *gobj; | |
300 | u32 handle; | |
301 | ||
302 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
303 | args->size = args->pitch * args->height; | |
304 | ||
305 | ret = mgag200_gem_create(dev, args->size, false, | |
306 | &gobj); | |
307 | if (ret) | |
308 | return ret; | |
309 | ||
310 | ret = drm_gem_handle_create(file, gobj, &handle); | |
311 | drm_gem_object_unreference_unlocked(gobj); | |
312 | if (ret) | |
313 | return ret; | |
314 | ||
315 | args->handle = handle; | |
316 | return 0; | |
317 | } | |
318 | ||
319 | int mgag200_dumb_destroy(struct drm_file *file, | |
320 | struct drm_device *dev, | |
321 | uint32_t handle) | |
322 | { | |
323 | return drm_gem_handle_delete(file, handle); | |
324 | } | |
325 | ||
326 | int mgag200_gem_init_object(struct drm_gem_object *obj) | |
327 | { | |
328 | BUG(); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | void mgag200_bo_unref(struct mgag200_bo **bo) | |
333 | { | |
334 | struct ttm_buffer_object *tbo; | |
335 | ||
336 | if ((*bo) == NULL) | |
337 | return; | |
338 | ||
339 | tbo = &((*bo)->bo); | |
340 | ttm_bo_unref(&tbo); | |
341 | if (tbo == NULL) | |
342 | *bo = NULL; | |
343 | ||
344 | } | |
345 | ||
346 | void mgag200_gem_free_object(struct drm_gem_object *obj) | |
347 | { | |
348 | struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj); | |
349 | ||
350 | if (!mgag200_bo) | |
351 | return; | |
352 | mgag200_bo_unref(&mgag200_bo); | |
353 | } | |
354 | ||
355 | ||
356 | static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo) | |
357 | { | |
358 | return bo->bo.addr_space_offset; | |
359 | } | |
360 | ||
361 | int | |
362 | mgag200_dumb_mmap_offset(struct drm_file *file, | |
363 | struct drm_device *dev, | |
364 | uint32_t handle, | |
365 | uint64_t *offset) | |
366 | { | |
367 | struct drm_gem_object *obj; | |
368 | int ret; | |
369 | struct mgag200_bo *bo; | |
370 | ||
371 | mutex_lock(&dev->struct_mutex); | |
372 | obj = drm_gem_object_lookup(dev, file, handle); | |
373 | if (obj == NULL) { | |
374 | ret = -ENOENT; | |
375 | goto out_unlock; | |
376 | } | |
377 | ||
378 | bo = gem_to_mga_bo(obj); | |
379 | *offset = mgag200_bo_mmap_offset(bo); | |
380 | ||
381 | drm_gem_object_unreference(obj); | |
382 | ret = 0; | |
383 | out_unlock: | |
384 | mutex_unlock(&dev->struct_mutex); | |
385 | return ret; | |
386 | ||
387 | } |