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 */
13 #include <drm/drmP.h>
14 #include <drm/drm_crtc_helper.h>
15 #include "mgag200_drv.h"
16
mga_user_framebuffer_destroy(struct drm_framebuffer * fb)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 const struct drm_framebuffer_funcs mga_fb_funcs = {
27 .destroy = mga_user_framebuffer_destroy,
28 };
29
mgag200_framebuffer_init(struct drm_device * dev,struct mga_framebuffer * gfb,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)30 int mgag200_framebuffer_init(struct drm_device *dev,
31 struct mga_framebuffer *gfb,
32 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(&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
47 static struct drm_framebuffer *
mgag200_user_framebuffer_create(struct drm_device * dev,struct drm_file * filp,struct drm_mode_fb_cmd2 * mode_cmd)48 mgag200_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 mga_framebuffer *mga_fb;
54 int ret;
55
56 obj = drm_gem_object_lookup(dev, 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
75 static const struct drm_mode_config_funcs mga_mode_funcs = {
76 .fb_create = mgag200_user_framebuffer_create,
77 };
78
mga_probe_vram(struct mga_device * mdev,void __iomem * mem)79 static 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 /* Probe */
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 /* Map the framebuffer from the card and configure the core */
mga_vram_init(struct mga_device * mdev)124 static 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 /* BAR 0 is VRAM */
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 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
mgag200_device_init(struct drm_device * dev,uint32_t flags)158 static 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 /* Hardcode the number of CRTCs to 1 */
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 /* BAR 0 is the framebuffer, BAR 1 contains registers */
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 /* stash G200 SE model number for later use */
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 * Functions here will be called by the core once it's bound the driver to
203 * a PCI device
204 */
205
206
mgag200_driver_load(struct drm_device * dev,unsigned long flags)207 int 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 /* Make small buffers to store a hardware cursor (double buffered icon updates) */
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
258 err_modeset:
259 drm_mode_config_cleanup(dev);
260 mgag200_mm_fini(mdev);
261 err_mm:
262 dev->dev_private = NULL;
263
264 return r;
265 }
266
mgag200_driver_unload(struct drm_device * dev)267 int mgag200_driver_unload(struct drm_device *dev)
268 {
269 struct mga_device *mdev = dev->dev_private;
270
271 if (mdev == NULL)
272 return 0;
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 return 0;
279 }
280
mgag200_gem_create(struct drm_device * dev,u32 size,bool iskernel,struct drm_gem_object ** obj)281 int mgag200_gem_create(struct drm_device *dev,
282 u32 size, bool iskernel,
283 struct drm_gem_object **obj)
284 {
285 struct mgag200_bo *astbo;
286 int ret;
287
288 *obj = NULL;
289
290 size = roundup(size, PAGE_SIZE);
291 if (size == 0)
292 return -EINVAL;
293
294 ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
295 if (ret) {
296 if (ret != -ERESTARTSYS)
297 DRM_ERROR("failed to allocate GEM object\n");
298 return ret;
299 }
300 *obj = &astbo->gem;
301 return 0;
302 }
303
mgag200_dumb_create(struct drm_file * file,struct drm_device * dev,struct drm_mode_create_dumb * args)304 int mgag200_dumb_create(struct drm_file *file,
305 struct drm_device *dev,
306 struct drm_mode_create_dumb *args)
307 {
308 int ret;
309 struct drm_gem_object *gobj;
310 u32 handle;
311
312 args->pitch = args->width * ((args->bpp + 7) / 8);
313 args->size = args->pitch * args->height;
314
315 ret = mgag200_gem_create(dev, args->size, false,
316 &gobj);
317 if (ret)
318 return ret;
319
320 ret = drm_gem_handle_create(file, gobj, &handle);
321 drm_gem_object_unreference_unlocked(gobj);
322 if (ret)
323 return ret;
324
325 args->handle = handle;
326 return 0;
327 }
328
mgag200_bo_unref(struct mgag200_bo ** bo)329 static void mgag200_bo_unref(struct mgag200_bo **bo)
330 {
331 struct ttm_buffer_object *tbo;
332
333 if ((*bo) == NULL)
334 return;
335
336 tbo = &((*bo)->bo);
337 ttm_bo_unref(&tbo);
338 *bo = NULL;
339 }
340
mgag200_gem_free_object(struct drm_gem_object * obj)341 void mgag200_gem_free_object(struct drm_gem_object *obj)
342 {
343 struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
344
345 mgag200_bo_unref(&mgag200_bo);
346 }
347
348
mgag200_bo_mmap_offset(struct mgag200_bo * bo)349 static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
350 {
351 return drm_vma_node_offset_addr(&bo->bo.vma_node);
352 }
353
354 int
mgag200_dumb_mmap_offset(struct drm_file * file,struct drm_device * dev,uint32_t handle,uint64_t * offset)355 mgag200_dumb_mmap_offset(struct drm_file *file,
356 struct drm_device *dev,
357 uint32_t handle,
358 uint64_t *offset)
359 {
360 struct drm_gem_object *obj;
361 struct mgag200_bo *bo;
362
363 obj = drm_gem_object_lookup(dev, file, handle);
364 if (obj == NULL)
365 return -ENOENT;
366
367 bo = gem_to_mga_bo(obj);
368 *offset = mgag200_bo_mmap_offset(bo);
369
370 drm_gem_object_unreference_unlocked(obj);
371 return 0;
372 }
373