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13#include <drm/drmP.h>
14#include <drm/drm_crtc_helper.h>
15#include "mgag200_drv.h"
16
17static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
18{
19 struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
20
21 drm_gem_object_unreference_unlocked(mga_fb->obj);
22 drm_framebuffer_cleanup(fb);
23 kfree(fb);
24}
25
26static const struct drm_framebuffer_funcs mga_fb_funcs = {
27 .destroy = mga_user_framebuffer_destroy,
28};
29
30int mgag200_framebuffer_init(struct drm_device *dev,
31 struct mga_framebuffer *gfb,
32 const struct drm_mode_fb_cmd2 *mode_cmd,
33 struct drm_gem_object *obj)
34{
35 int ret;
36
37 drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
38 gfb->obj = obj;
39 ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
40 if (ret) {
41 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
42 return ret;
43 }
44 return 0;
45}
46
47static struct drm_framebuffer *
48mgag200_user_framebuffer_create(struct drm_device *dev,
49 struct drm_file *filp,
50 const struct drm_mode_fb_cmd2 *mode_cmd)
51{
52 struct drm_gem_object *obj;
53 struct mga_framebuffer *mga_fb;
54 int ret;
55
56 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
57 if (obj == NULL)
58 return ERR_PTR(-ENOENT);
59
60 mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
61 if (!mga_fb) {
62 drm_gem_object_unreference_unlocked(obj);
63 return ERR_PTR(-ENOMEM);
64 }
65
66 ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
67 if (ret) {
68 drm_gem_object_unreference_unlocked(obj);
69 kfree(mga_fb);
70 return ERR_PTR(ret);
71 }
72 return &mga_fb->base;
73}
74
75static const struct drm_mode_config_funcs mga_mode_funcs = {
76 .fb_create = mgag200_user_framebuffer_create,
77};
78
79static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
80{
81 int offset;
82 int orig;
83 int test1, test2;
84 int orig1, orig2;
85 unsigned int vram_size;
86
87
88 orig = ioread16(mem);
89 iowrite16(0, mem);
90
91 vram_size = mdev->mc.vram_window;
92
93 if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
94 vram_size = vram_size - 0x400000;
95 }
96
97 for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
98 orig1 = ioread8(mem + offset);
99 orig2 = ioread8(mem + offset + 0x100);
100
101 iowrite16(0xaa55, mem + offset);
102 iowrite16(0xaa55, mem + offset + 0x100);
103
104 test1 = ioread16(mem + offset);
105 test2 = ioread16(mem);
106
107 iowrite16(orig1, mem + offset);
108 iowrite16(orig2, mem + offset + 0x100);
109
110 if (test1 != 0xaa55) {
111 break;
112 }
113
114 if (test2) {
115 break;
116 }
117 }
118
119 iowrite16(orig, mem);
120 return offset - 65536;
121}
122
123
124static int mga_vram_init(struct mga_device *mdev)
125{
126 void __iomem *mem;
127 struct apertures_struct *aper = alloc_apertures(1);
128 if (!aper)
129 return -ENOMEM;
130
131
132 mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
133 mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
134
135 aper->ranges[0].base = mdev->mc.vram_base;
136 aper->ranges[0].size = mdev->mc.vram_window;
137
138 drm_fb_helper_remove_conflicting_framebuffers(aper, "mgafb", true);
139 kfree(aper);
140
141 if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
142 "mgadrmfb_vram")) {
143 DRM_ERROR("can't reserve VRAM\n");
144 return -ENXIO;
145 }
146
147 mem = pci_iomap(mdev->dev->pdev, 0, 0);
148 if (!mem)
149 return -ENOMEM;
150
151 mdev->mc.vram_size = mga_probe_vram(mdev, mem);
152
153 pci_iounmap(mdev->dev->pdev, mem);
154
155 return 0;
156}
157
158static int mgag200_device_init(struct drm_device *dev,
159 uint32_t flags)
160{
161 struct mga_device *mdev = dev->dev_private;
162 int ret, option;
163
164 mdev->type = flags;
165
166
167 mdev->num_crtc = 1;
168
169 pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
170 mdev->has_sdram = !(option & (1 << 14));
171
172
173 mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
174 mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
175
176 if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
177 "mgadrmfb_mmio")) {
178 DRM_ERROR("can't reserve mmio registers\n");
179 return -ENOMEM;
180 }
181
182 mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
183 if (mdev->rmmio == NULL)
184 return -ENOMEM;
185
186
187 if (IS_G200_SE(mdev))
188 mdev->unique_rev_id = RREG32(0x1e24);
189
190 ret = mga_vram_init(mdev);
191 if (ret)
192 return ret;
193
194 mdev->bpp_shifts[0] = 0;
195 mdev->bpp_shifts[1] = 1;
196 mdev->bpp_shifts[2] = 0;
197 mdev->bpp_shifts[3] = 2;
198 return 0;
199}
200
201
202
203
204
205
206
207int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
208{
209 struct mga_device *mdev;
210 int r;
211
212 mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
213 if (mdev == NULL)
214 return -ENOMEM;
215 dev->dev_private = (void *)mdev;
216 mdev->dev = dev;
217
218 r = mgag200_device_init(dev, flags);
219 if (r) {
220 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
221 return r;
222 }
223 r = mgag200_mm_init(mdev);
224 if (r)
225 goto err_mm;
226
227 drm_mode_config_init(dev);
228 dev->mode_config.funcs = (void *)&mga_mode_funcs;
229 if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
230 dev->mode_config.preferred_depth = 16;
231 else
232 dev->mode_config.preferred_depth = 24;
233 dev->mode_config.prefer_shadow = 1;
234
235 r = mgag200_modeset_init(mdev);
236 if (r) {
237 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
238 goto err_modeset;
239 }
240
241
242 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
243 &mdev->cursor.pixels_1);
244 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
245 &mdev->cursor.pixels_2);
246 if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
247 mdev->cursor.pixels_1 = NULL;
248 mdev->cursor.pixels_2 = NULL;
249 dev_warn(&dev->pdev->dev,
250 "Could not allocate space for cursors. Not doing hardware cursors.\n");
251 } else {
252 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
253 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
254 }
255
256 return 0;
257
258err_modeset:
259 drm_mode_config_cleanup(dev);
260 mgag200_mm_fini(mdev);
261err_mm:
262 dev->dev_private = NULL;
263
264 return r;
265}
266
267void mgag200_driver_unload(struct drm_device *dev)
268{
269 struct mga_device *mdev = dev->dev_private;
270
271 if (mdev == NULL)
272 return;
273 mgag200_modeset_fini(mdev);
274 mgag200_fbdev_fini(mdev);
275 drm_mode_config_cleanup(dev);
276 mgag200_mm_fini(mdev);
277 dev->dev_private = NULL;
278}
279
280int mgag200_gem_create(struct drm_device *dev,
281 u32 size, bool iskernel,
282 struct drm_gem_object **obj)
283{
284 struct mgag200_bo *astbo;
285 int ret;
286
287 *obj = NULL;
288
289 size = roundup(size, PAGE_SIZE);
290 if (size == 0)
291 return -EINVAL;
292
293 ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
294 if (ret) {
295 if (ret != -ERESTARTSYS)
296 DRM_ERROR("failed to allocate GEM object\n");
297 return ret;
298 }
299 *obj = &astbo->gem;
300 return 0;
301}
302
303int mgag200_dumb_create(struct drm_file *file,
304 struct drm_device *dev,
305 struct drm_mode_create_dumb *args)
306{
307 int ret;
308 struct drm_gem_object *gobj;
309 u32 handle;
310
311 args->pitch = args->width * ((args->bpp + 7) / 8);
312 args->size = args->pitch * args->height;
313
314 ret = mgag200_gem_create(dev, args->size, false,
315 &gobj);
316 if (ret)
317 return ret;
318
319 ret = drm_gem_handle_create(file, gobj, &handle);
320 drm_gem_object_unreference_unlocked(gobj);
321 if (ret)
322 return ret;
323
324 args->handle = handle;
325 return 0;
326}
327
328static void mgag200_bo_unref(struct mgag200_bo **bo)
329{
330 struct ttm_buffer_object *tbo;
331
332 if ((*bo) == NULL)
333 return;
334
335 tbo = &((*bo)->bo);
336 ttm_bo_unref(&tbo);
337 *bo = NULL;
338}
339
340void mgag200_gem_free_object(struct drm_gem_object *obj)
341{
342 struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
343
344 mgag200_bo_unref(&mgag200_bo);
345}
346
347
348static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
349{
350 return drm_vma_node_offset_addr(&bo->bo.vma_node);
351}
352
353int
354mgag200_dumb_mmap_offset(struct drm_file *file,
355 struct drm_device *dev,
356 uint32_t handle,
357 uint64_t *offset)
358{
359 struct drm_gem_object *obj;
360 struct mgag200_bo *bo;
361
362 obj = drm_gem_object_lookup(file, handle);
363 if (obj == NULL)
364 return -ENOENT;
365
366 bo = gem_to_mga_bo(obj);
367 *offset = mgag200_bo_mmap_offset(bo);
368
369 drm_gem_object_unreference_unlocked(obj);
370 return 0;
371}
372
