tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
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(&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 /* 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 */
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 /* 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 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
149 mdev->mc.vram_size = mga_probe_vram(mdev, mem);
150
151 pci_iounmap(mdev->dev->pdev, mem);
152
153 return 0;
154}
155
156static int mgag200_device_init(struct drm_device *dev,
157 uint32_t flags)
158{
159 struct mga_device *mdev = dev->dev_private;
160 int ret, option;
161
162 mdev->type = flags;
163
164 /* Hardcode the number of CRTCs to 1 */
165 mdev->num_crtc = 1;
166
167 pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
168 mdev->has_sdram = !(option & (1 << 14));
169
170 /* BAR 0 is the framebuffer, BAR 1 contains registers */
171 mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
172 mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
173
174 if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
175 "mgadrmfb_mmio")) {
176 DRM_ERROR("can't reserve mmio registers\n");
177 return -ENOMEM;
178 }
179
180 mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
181 if (mdev->rmmio == NULL)
182 return -ENOMEM;
183
184 /* stash G200 SE model number for later use */
185 if (IS_G200_SE(mdev))
186 mdev->unique_rev_id = RREG32(0x1e24);
187
188 ret = mga_vram_init(mdev);
189 if (ret)
190 return ret;
191
192 mdev->bpp_shifts[0] = 0;
193 mdev->bpp_shifts[1] = 1;
194 mdev->bpp_shifts[2] = 0;
195 mdev->bpp_shifts[3] = 2;
196 return 0;
197}
198
199/*
200 * Functions here will be called by the core once it's bound the driver to
201 * a PCI device
202 */
203
204
205int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
206{
207 struct mga_device *mdev;
208 int r;
209
210 mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
211 if (mdev == NULL)
212 return -ENOMEM;
213 dev->dev_private = (void *)mdev;
214 mdev->dev = dev;
215
216 r = mgag200_device_init(dev, flags);
217 if (r) {
218 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
219 return r;
220 }
221 r = mgag200_mm_init(mdev);
222 if (r)
223 goto err_mm;
224
225 drm_mode_config_init(dev);
226 dev->mode_config.funcs = (void *)&mga_mode_funcs;
227 if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
228 dev->mode_config.preferred_depth = 16;
229 else
230 dev->mode_config.preferred_depth = 24;
231 dev->mode_config.prefer_shadow = 1;
232
233 r = mgag200_modeset_init(mdev);
234 if (r) {
235 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
236 goto err_modeset;
237 }
238
239 /* Make small buffers to store a hardware cursor (double buffered icon updates) */
240 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
241 &mdev->cursor.pixels_1);
242 mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
243 &mdev->cursor.pixels_2);
244 if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
245 mdev->cursor.pixels_1 = NULL;
246 mdev->cursor.pixels_2 = NULL;
247 dev_warn(&dev->pdev->dev,
248 "Could not allocate space for cursors. Not doing hardware cursors.\n");
249 } else {
250 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
251 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
252 }
253
254 return 0;
255
256err_modeset:
257 drm_mode_config_cleanup(dev);
258 mgag200_mm_fini(mdev);
259err_mm:
260 dev->dev_private = NULL;
261
262 return r;
263}
264
265int mgag200_driver_unload(struct drm_device *dev)
266{
267 struct mga_device *mdev = dev->dev_private;
268
269 if (mdev == NULL)
270 return 0;
271 mgag200_modeset_fini(mdev);
272 mgag200_fbdev_fini(mdev);
273 drm_mode_config_cleanup(dev);
274 mgag200_mm_fini(mdev);
275 dev->dev_private = NULL;
276 return 0;
277}
278
279int mgag200_gem_create(struct drm_device *dev,
280 u32 size, bool iskernel,
281 struct drm_gem_object **obj)
282{
283 struct mgag200_bo *astbo;
284 int ret;
285
286 *obj = NULL;
287
288 size = roundup(size, PAGE_SIZE);
289 if (size == 0)
290 return -EINVAL;
291
292 ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
293 if (ret) {
294 if (ret != -ERESTARTSYS)
295 DRM_ERROR("failed to allocate GEM object\n");
296 return ret;
297 }
298 *obj = &astbo->gem;
299 return 0;
300}
301
302int mgag200_dumb_create(struct drm_file *file,
303 struct drm_device *dev,
304 struct drm_mode_create_dumb *args)
305{
306 int ret;
307 struct drm_gem_object *gobj;
308 u32 handle;
309
310 args->pitch = args->width * ((args->bpp + 7) / 8);
311 args->size = args->pitch * args->height;
312
313 ret = mgag200_gem_create(dev, args->size, false,
314 &gobj);
315 if (ret)
316 return ret;
317
318 ret = drm_gem_handle_create(file, gobj, &handle);
319 drm_gem_object_unreference_unlocked(gobj);
320 if (ret)
321 return ret;
322
323 args->handle = handle;
324 return 0;
325}
326
327static void mgag200_bo_unref(struct mgag200_bo **bo)
328{
329 struct ttm_buffer_object *tbo;
330
331 if ((*bo) == NULL)
332 return;
333
334 tbo = &((*bo)->bo);
335 ttm_bo_unref(&tbo);
336 *bo = NULL;
337}
338
339void mgag200_gem_free_object(struct drm_gem_object *obj)
340{
341 struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
342
343 mgag200_bo_unref(&mgag200_bo);
344}
345
346
347static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
348{
349 return drm_vma_node_offset_addr(&bo->bo.vma_node);
350}
351
352int
353mgag200_dumb_mmap_offset(struct drm_file *file,
354 struct drm_device *dev,
355 uint32_t handle,
356 uint64_t *offset)
357{
358 struct drm_gem_object *obj;
359 struct mgag200_bo *bo;
360
361 obj = drm_gem_object_lookup(file, handle);
362 if (obj == NULL)
363 return -ENOENT;
364
365 bo = gem_to_mga_bo(obj);
366 *offset = mgag200_bo_mmap_offset(bo);
367
368 drm_gem_object_unreference_unlocked(obj);
369 return 0;
370}