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
86 /* Probe */
87 orig = ioread16(mem);
88 iowrite16(0, mem);
89
90 for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
91 orig1 = ioread8(mem + offset);
92 orig2 = ioread8(mem + offset + 0x100);
93
94 iowrite16(0xaa55, mem + offset);
95 iowrite16(0xaa55, mem + offset + 0x100);
96
97 test1 = ioread16(mem + offset);
98 test2 = ioread16(mem);
99
100 iowrite16(orig1, mem + offset);
101 iowrite16(orig2, mem + offset + 0x100);
102
103 if (test1 != 0xaa55) {
104 break;
105 }
106
107 if (test2) {
108 break;
109 }
110 }
111
112 iowrite16(orig, mem);
113 return offset - 65536;
114 }
115
116 /* Map the framebuffer from the card and configure the core */
mga_vram_init(struct mga_device * mdev)117 static int mga_vram_init(struct mga_device *mdev)
118 {
119 void __iomem *mem;
120 struct apertures_struct *aper = alloc_apertures(1);
121 if (!aper)
122 return -ENOMEM;
123
124 /* BAR 0 is VRAM */
125 mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
126 mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
127
128 aper->ranges[0].base = mdev->mc.vram_base;
129 aper->ranges[0].size = mdev->mc.vram_window;
130
131 remove_conflicting_framebuffers(aper, "mgafb", true);
132 kfree(aper);
133
134 if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
135 "mgadrmfb_vram")) {
136 DRM_ERROR("can't reserve VRAM\n");
137 return -ENXIO;
138 }
139
140 mem = pci_iomap(mdev->dev->pdev, 0, 0);
141
142 mdev->mc.vram_size = mga_probe_vram(mdev, mem);
143
144 pci_iounmap(mdev->dev->pdev, mem);
145
146 return 0;
147 }
148
mgag200_device_init(struct drm_device * dev,uint32_t flags)149 static int mgag200_device_init(struct drm_device *dev,
150 uint32_t flags)
151 {
152 struct mga_device *mdev = dev->dev_private;
153 int ret, option;
154
155 mdev->type = flags;
156
157 /* Hardcode the number of CRTCs to 1 */
158 mdev->num_crtc = 1;
159
160 pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
161 mdev->has_sdram = !(option & (1 << 14));
162
163 /* BAR 0 is the framebuffer, BAR 1 contains registers */
164 mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
165 mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
166
167 if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
168 "mgadrmfb_mmio")) {
169 DRM_ERROR("can't reserve mmio registers\n");
170 return -ENOMEM;
171 }
172
173 mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
174 if (mdev->rmmio == NULL)
175 return -ENOMEM;
176
177 /* stash G200 SE model number for later use */
178 if (IS_G200_SE(mdev))
179 mdev->unique_rev_id = RREG32(0x1e24);
180
181 ret = mga_vram_init(mdev);
182 if (ret)
183 return ret;
184
185 mdev->bpp_shifts[0] = 0;
186 mdev->bpp_shifts[1] = 1;
187 mdev->bpp_shifts[2] = 0;
188 mdev->bpp_shifts[3] = 2;
189 return 0;
190 }
191
192 /*
193 * Functions here will be called by the core once it's bound the driver to
194 * a PCI device
195 */
196
197
mgag200_driver_load(struct drm_device * dev,unsigned long flags)198 int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
199 {
200 struct mga_device *mdev;
201 int r;
202
203 mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
204 if (mdev == NULL)
205 return -ENOMEM;
206 dev->dev_private = (void *)mdev;
207 mdev->dev = dev;
208
209 r = mgag200_device_init(dev, flags);
210 if (r) {
211 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
212 return r;
213 }
214 r = mgag200_mm_init(mdev);
215 if (r)
216 goto out;
217
218 drm_mode_config_init(dev);
219 dev->mode_config.funcs = (void *)&mga_mode_funcs;
220 if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
221 dev->mode_config.preferred_depth = 16;
222 else
223 dev->mode_config.preferred_depth = 24;
224 dev->mode_config.prefer_shadow = 1;
225
226 r = mgag200_modeset_init(mdev);
227 if (r) {
228 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
229 goto out;
230 }
231
232 /* Make small buffers to store a hardware cursor (double buffered icon updates) */
233 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
234 &mdev->cursor.pixels_1);
235 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
236 &mdev->cursor.pixels_2);
237 if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1)
238 goto cursor_nospace;
239 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
240 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
241 goto cursor_done;
242 cursor_nospace:
243 mdev->cursor.pixels_1 = NULL;
244 mdev->cursor.pixels_2 = NULL;
245 dev_warn(&dev->pdev->dev, "Could not allocate space for cursors. Not doing hardware cursors.\n");
246 cursor_done:
247
248 out:
249 if (r)
250 mgag200_driver_unload(dev);
251 return r;
252 }
253
mgag200_driver_unload(struct drm_device * dev)254 int mgag200_driver_unload(struct drm_device *dev)
255 {
256 struct mga_device *mdev = dev->dev_private;
257
258 if (mdev == NULL)
259 return 0;
260 mgag200_modeset_fini(mdev);
261 mgag200_fbdev_fini(mdev);
262 drm_mode_config_cleanup(dev);
263 mgag200_mm_fini(mdev);
264 dev->dev_private = NULL;
265 return 0;
266 }
267
mgag200_gem_create(struct drm_device * dev,u32 size,bool iskernel,struct drm_gem_object ** obj)268 int mgag200_gem_create(struct drm_device *dev,
269 u32 size, bool iskernel,
270 struct drm_gem_object **obj)
271 {
272 struct mgag200_bo *astbo;
273 int ret;
274
275 *obj = NULL;
276
277 size = roundup(size, PAGE_SIZE);
278 if (size == 0)
279 return -EINVAL;
280
281 ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
282 if (ret) {
283 if (ret != -ERESTARTSYS)
284 DRM_ERROR("failed to allocate GEM object\n");
285 return ret;
286 }
287 *obj = &astbo->gem;
288 return 0;
289 }
290
mgag200_dumb_create(struct drm_file * file,struct drm_device * dev,struct drm_mode_create_dumb * args)291 int mgag200_dumb_create(struct drm_file *file,
292 struct drm_device *dev,
293 struct drm_mode_create_dumb *args)
294 {
295 int ret;
296 struct drm_gem_object *gobj;
297 u32 handle;
298
299 args->pitch = args->width * ((args->bpp + 7) / 8);
300 args->size = args->pitch * args->height;
301
302 ret = mgag200_gem_create(dev, args->size, false,
303 &gobj);
304 if (ret)
305 return ret;
306
307 ret = drm_gem_handle_create(file, gobj, &handle);
308 drm_gem_object_unreference_unlocked(gobj);
309 if (ret)
310 return ret;
311
312 args->handle = handle;
313 return 0;
314 }
315
mgag200_bo_unref(struct mgag200_bo ** bo)316 static void mgag200_bo_unref(struct mgag200_bo **bo)
317 {
318 struct ttm_buffer_object *tbo;
319
320 if ((*bo) == NULL)
321 return;
322
323 tbo = &((*bo)->bo);
324 ttm_bo_unref(&tbo);
325 *bo = NULL;
326 }
327
mgag200_gem_free_object(struct drm_gem_object * obj)328 void mgag200_gem_free_object(struct drm_gem_object *obj)
329 {
330 struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
331
332 mgag200_bo_unref(&mgag200_bo);
333 }
334
335
mgag200_bo_mmap_offset(struct mgag200_bo * bo)336 static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
337 {
338 return drm_vma_node_offset_addr(&bo->bo.vma_node);
339 }
340
341 int
mgag200_dumb_mmap_offset(struct drm_file * file,struct drm_device * dev,uint32_t handle,uint64_t * offset)342 mgag200_dumb_mmap_offset(struct drm_file *file,
343 struct drm_device *dev,
344 uint32_t handle,
345 uint64_t *offset)
346 {
347 struct drm_gem_object *obj;
348 int ret;
349 struct mgag200_bo *bo;
350
351 mutex_lock(&dev->struct_mutex);
352 obj = drm_gem_object_lookup(dev, file, handle);
353 if (obj == NULL) {
354 ret = -ENOENT;
355 goto out_unlock;
356 }
357
358 bo = gem_to_mga_bo(obj);
359 *offset = mgag200_bo_mmap_offset(bo);
360
361 drm_gem_object_unreference(obj);
362 ret = 0;
363 out_unlock:
364 mutex_unlock(&dev->struct_mutex);
365 return ret;
366
367 }
368