1 // SPDX-License-Identifier: GPL-2.0-or-later
2
3 #include <linux/module.h>
4 #include <linux/pci.h>
5
6 #include <drm/drm_aperture.h>
7 #include <drm/drm_atomic_helper.h>
8 #include <drm/drm_drv.h>
9 #include <drm/drm_edid.h>
10 #include <drm/drm_fbdev_generic.h>
11 #include <drm/drm_fourcc.h>
12 #include <drm/drm_framebuffer.h>
13 #include <drm/drm_gem_framebuffer_helper.h>
14 #include <drm/drm_gem_vram_helper.h>
15 #include <drm/drm_managed.h>
16 #include <drm/drm_module.h>
17 #include <drm/drm_probe_helper.h>
18 #include <drm/drm_simple_kms_helper.h>
19
20 #include <video/vga.h>
21
22 /* ---------------------------------------------------------------------- */
23
24 #define VBE_DISPI_IOPORT_INDEX 0x01CE
25 #define VBE_DISPI_IOPORT_DATA 0x01CF
26
27 #define VBE_DISPI_INDEX_ID 0x0
28 #define VBE_DISPI_INDEX_XRES 0x1
29 #define VBE_DISPI_INDEX_YRES 0x2
30 #define VBE_DISPI_INDEX_BPP 0x3
31 #define VBE_DISPI_INDEX_ENABLE 0x4
32 #define VBE_DISPI_INDEX_BANK 0x5
33 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
34 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
35 #define VBE_DISPI_INDEX_X_OFFSET 0x8
36 #define VBE_DISPI_INDEX_Y_OFFSET 0x9
37 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
38
39 #define VBE_DISPI_ID0 0xB0C0
40 #define VBE_DISPI_ID1 0xB0C1
41 #define VBE_DISPI_ID2 0xB0C2
42 #define VBE_DISPI_ID3 0xB0C3
43 #define VBE_DISPI_ID4 0xB0C4
44 #define VBE_DISPI_ID5 0xB0C5
45
46 #define VBE_DISPI_DISABLED 0x00
47 #define VBE_DISPI_ENABLED 0x01
48 #define VBE_DISPI_GETCAPS 0x02
49 #define VBE_DISPI_8BIT_DAC 0x20
50 #define VBE_DISPI_LFB_ENABLED 0x40
51 #define VBE_DISPI_NOCLEARMEM 0x80
52
53 static int bochs_modeset = -1;
54 static int defx = 1024;
55 static int defy = 768;
56
57 module_param_named(modeset, bochs_modeset, int, 0444);
58 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
59
60 module_param(defx, int, 0444);
61 module_param(defy, int, 0444);
62 MODULE_PARM_DESC(defx, "default x resolution");
63 MODULE_PARM_DESC(defy, "default y resolution");
64
65 /* ---------------------------------------------------------------------- */
66
67 enum bochs_types {
68 BOCHS_QEMU_STDVGA,
69 BOCHS_SIMICS,
70 BOCHS_UNKNOWN,
71 };
72
73 struct bochs_device {
74 /* hw */
75 void __iomem *mmio;
76 int ioports;
77 void __iomem *fb_map;
78 unsigned long fb_base;
79 unsigned long fb_size;
80 unsigned long qext_size;
81
82 /* mode */
83 u16 xres;
84 u16 yres;
85 u16 yres_virtual;
86 u32 stride;
87 u32 bpp;
88 struct edid *edid;
89
90 /* drm */
91 struct drm_device *dev;
92 struct drm_simple_display_pipe pipe;
93 struct drm_connector connector;
94 };
95
96 /* ---------------------------------------------------------------------- */
97
bochs_vga_writeb(struct bochs_device * bochs,u16 ioport,u8 val)98 static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
99 {
100 if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
101 return;
102
103 if (bochs->mmio) {
104 int offset = ioport - 0x3c0 + 0x400;
105
106 writeb(val, bochs->mmio + offset);
107 } else {
108 outb(val, ioport);
109 }
110 }
111
bochs_vga_readb(struct bochs_device * bochs,u16 ioport)112 static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport)
113 {
114 if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
115 return 0xff;
116
117 if (bochs->mmio) {
118 int offset = ioport - 0x3c0 + 0x400;
119
120 return readb(bochs->mmio + offset);
121 } else {
122 return inb(ioport);
123 }
124 }
125
bochs_dispi_read(struct bochs_device * bochs,u16 reg)126 static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
127 {
128 u16 ret = 0;
129
130 if (bochs->mmio) {
131 int offset = 0x500 + (reg << 1);
132
133 ret = readw(bochs->mmio + offset);
134 } else {
135 outw(reg, VBE_DISPI_IOPORT_INDEX);
136 ret = inw(VBE_DISPI_IOPORT_DATA);
137 }
138 return ret;
139 }
140
bochs_dispi_write(struct bochs_device * bochs,u16 reg,u16 val)141 static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
142 {
143 if (bochs->mmio) {
144 int offset = 0x500 + (reg << 1);
145
146 writew(val, bochs->mmio + offset);
147 } else {
148 outw(reg, VBE_DISPI_IOPORT_INDEX);
149 outw(val, VBE_DISPI_IOPORT_DATA);
150 }
151 }
152
bochs_hw_set_big_endian(struct bochs_device * bochs)153 static void bochs_hw_set_big_endian(struct bochs_device *bochs)
154 {
155 if (bochs->qext_size < 8)
156 return;
157
158 writel(0xbebebebe, bochs->mmio + 0x604);
159 }
160
bochs_hw_set_little_endian(struct bochs_device * bochs)161 static void bochs_hw_set_little_endian(struct bochs_device *bochs)
162 {
163 if (bochs->qext_size < 8)
164 return;
165
166 writel(0x1e1e1e1e, bochs->mmio + 0x604);
167 }
168
169 #ifdef __BIG_ENDIAN
170 #define bochs_hw_set_native_endian(_b) bochs_hw_set_big_endian(_b)
171 #else
172 #define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b)
173 #endif
174
bochs_get_edid_block(void * data,u8 * buf,unsigned int block,size_t len)175 static int bochs_get_edid_block(void *data, u8 *buf,
176 unsigned int block, size_t len)
177 {
178 struct bochs_device *bochs = data;
179 size_t i, start = block * EDID_LENGTH;
180
181 if (start + len > 0x400 /* vga register offset */)
182 return -1;
183
184 for (i = 0; i < len; i++)
185 buf[i] = readb(bochs->mmio + start + i);
186
187 return 0;
188 }
189
bochs_hw_load_edid(struct bochs_device * bochs)190 static int bochs_hw_load_edid(struct bochs_device *bochs)
191 {
192 u8 header[8];
193
194 if (!bochs->mmio)
195 return -1;
196
197 /* check header to detect whenever edid support is enabled in qemu */
198 bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header));
199 if (drm_edid_header_is_valid(header) != 8)
200 return -1;
201
202 kfree(bochs->edid);
203 bochs->edid = drm_do_get_edid(&bochs->connector,
204 bochs_get_edid_block, bochs);
205 if (bochs->edid == NULL)
206 return -1;
207
208 return 0;
209 }
210
bochs_hw_init(struct drm_device * dev)211 static int bochs_hw_init(struct drm_device *dev)
212 {
213 struct bochs_device *bochs = dev->dev_private;
214 struct pci_dev *pdev = to_pci_dev(dev->dev);
215 unsigned long addr, size, mem, ioaddr, iosize;
216 u16 id;
217
218 if (pdev->resource[2].flags & IORESOURCE_MEM) {
219 /* mmio bar with vga and bochs registers present */
220 if (pci_request_region(pdev, 2, "bochs-drm") != 0) {
221 DRM_ERROR("Cannot request mmio region\n");
222 return -EBUSY;
223 }
224 ioaddr = pci_resource_start(pdev, 2);
225 iosize = pci_resource_len(pdev, 2);
226 bochs->mmio = ioremap(ioaddr, iosize);
227 if (bochs->mmio == NULL) {
228 DRM_ERROR("Cannot map mmio region\n");
229 return -ENOMEM;
230 }
231 } else {
232 ioaddr = VBE_DISPI_IOPORT_INDEX;
233 iosize = 2;
234 if (!request_region(ioaddr, iosize, "bochs-drm")) {
235 DRM_ERROR("Cannot request ioports\n");
236 return -EBUSY;
237 }
238 bochs->ioports = 1;
239 }
240
241 id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
242 mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K)
243 * 64 * 1024;
244 if ((id & 0xfff0) != VBE_DISPI_ID0) {
245 DRM_ERROR("ID mismatch\n");
246 return -ENODEV;
247 }
248
249 if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)
250 return -ENODEV;
251 addr = pci_resource_start(pdev, 0);
252 size = pci_resource_len(pdev, 0);
253 if (addr == 0)
254 return -ENODEV;
255 if (size != mem) {
256 DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n",
257 size, mem);
258 size = min(size, mem);
259 }
260
261 if (pci_request_region(pdev, 0, "bochs-drm") != 0)
262 DRM_WARN("Cannot request framebuffer, boot fb still active?\n");
263
264 bochs->fb_map = ioremap(addr, size);
265 if (bochs->fb_map == NULL) {
266 DRM_ERROR("Cannot map framebuffer\n");
267 return -ENOMEM;
268 }
269 bochs->fb_base = addr;
270 bochs->fb_size = size;
271
272 DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
273 DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
274 size / 1024, addr,
275 bochs->ioports ? "ioports" : "mmio",
276 ioaddr);
277
278 if (bochs->mmio && pdev->revision >= 2) {
279 bochs->qext_size = readl(bochs->mmio + 0x600);
280 if (bochs->qext_size < 4 || bochs->qext_size > iosize) {
281 bochs->qext_size = 0;
282 goto noext;
283 }
284 DRM_DEBUG("Found qemu ext regs, size %ld\n",
285 bochs->qext_size);
286 bochs_hw_set_native_endian(bochs);
287 }
288
289 noext:
290 return 0;
291 }
292
bochs_hw_fini(struct drm_device * dev)293 static void bochs_hw_fini(struct drm_device *dev)
294 {
295 struct bochs_device *bochs = dev->dev_private;
296
297 /* TODO: shot down existing vram mappings */
298
299 if (bochs->mmio)
300 iounmap(bochs->mmio);
301 if (bochs->ioports)
302 release_region(VBE_DISPI_IOPORT_INDEX, 2);
303 if (bochs->fb_map)
304 iounmap(bochs->fb_map);
305 pci_release_regions(to_pci_dev(dev->dev));
306 kfree(bochs->edid);
307 }
308
bochs_hw_blank(struct bochs_device * bochs,bool blank)309 static void bochs_hw_blank(struct bochs_device *bochs, bool blank)
310 {
311 DRM_DEBUG_DRIVER("hw_blank %d\n", blank);
312 /* enable color bit (so VGA_IS1_RC access works) */
313 bochs_vga_writeb(bochs, VGA_MIS_W, VGA_MIS_COLOR);
314 /* discard ar_flip_flop */
315 (void)bochs_vga_readb(bochs, VGA_IS1_RC);
316 /* blank or unblank; we need only update index and set 0x20 */
317 bochs_vga_writeb(bochs, VGA_ATT_W, blank ? 0 : 0x20);
318 }
319
bochs_hw_setmode(struct bochs_device * bochs,struct drm_display_mode * mode)320 static void bochs_hw_setmode(struct bochs_device *bochs, struct drm_display_mode *mode)
321 {
322 int idx;
323
324 if (!drm_dev_enter(bochs->dev, &idx))
325 return;
326
327 bochs->xres = mode->hdisplay;
328 bochs->yres = mode->vdisplay;
329 bochs->bpp = 32;
330 bochs->stride = mode->hdisplay * (bochs->bpp / 8);
331 bochs->yres_virtual = bochs->fb_size / bochs->stride;
332
333 DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
334 bochs->xres, bochs->yres, bochs->bpp,
335 bochs->yres_virtual);
336
337 bochs_hw_blank(bochs, false);
338
339 bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, 0);
340 bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP, bochs->bpp);
341 bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES, bochs->xres);
342 bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES, bochs->yres);
343 bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK, 0);
344 bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, bochs->xres);
345 bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT,
346 bochs->yres_virtual);
347 bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0);
348 bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, 0);
349
350 bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
351 VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
352
353 drm_dev_exit(idx);
354 }
355
bochs_hw_setformat(struct bochs_device * bochs,const struct drm_format_info * format)356 static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format)
357 {
358 int idx;
359
360 if (!drm_dev_enter(bochs->dev, &idx))
361 return;
362
363 DRM_DEBUG_DRIVER("format %c%c%c%c\n",
364 (format->format >> 0) & 0xff,
365 (format->format >> 8) & 0xff,
366 (format->format >> 16) & 0xff,
367 (format->format >> 24) & 0xff);
368
369 switch (format->format) {
370 case DRM_FORMAT_XRGB8888:
371 bochs_hw_set_little_endian(bochs);
372 break;
373 case DRM_FORMAT_BGRX8888:
374 bochs_hw_set_big_endian(bochs);
375 break;
376 default:
377 /* should not happen */
378 DRM_ERROR("%s: Huh? Got framebuffer format 0x%x",
379 __func__, format->format);
380 break;
381 }
382
383 drm_dev_exit(idx);
384 }
385
bochs_hw_setbase(struct bochs_device * bochs,int x,int y,int stride,u64 addr)386 static void bochs_hw_setbase(struct bochs_device *bochs, int x, int y, int stride, u64 addr)
387 {
388 unsigned long offset;
389 unsigned int vx, vy, vwidth, idx;
390
391 if (!drm_dev_enter(bochs->dev, &idx))
392 return;
393
394 bochs->stride = stride;
395 offset = (unsigned long)addr +
396 y * bochs->stride +
397 x * (bochs->bpp / 8);
398 vy = offset / bochs->stride;
399 vx = (offset % bochs->stride) * 8 / bochs->bpp;
400 vwidth = stride * 8 / bochs->bpp;
401
402 DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
403 x, y, addr, offset, vx, vy);
404 bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
405 bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
406 bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
407
408 drm_dev_exit(idx);
409 }
410
411 /* ---------------------------------------------------------------------- */
412
413 static const uint32_t bochs_formats[] = {
414 DRM_FORMAT_XRGB8888,
415 DRM_FORMAT_BGRX8888,
416 };
417
bochs_plane_update(struct bochs_device * bochs,struct drm_plane_state * state)418 static void bochs_plane_update(struct bochs_device *bochs, struct drm_plane_state *state)
419 {
420 struct drm_gem_vram_object *gbo;
421 s64 gpu_addr;
422
423 if (!state->fb || !bochs->stride)
424 return;
425
426 gbo = drm_gem_vram_of_gem(state->fb->obj[0]);
427 gpu_addr = drm_gem_vram_offset(gbo);
428 if (WARN_ON_ONCE(gpu_addr < 0))
429 return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
430
431 bochs_hw_setbase(bochs,
432 state->crtc_x,
433 state->crtc_y,
434 state->fb->pitches[0],
435 state->fb->offsets[0] + gpu_addr);
436 bochs_hw_setformat(bochs, state->fb->format);
437 }
438
bochs_pipe_enable(struct drm_simple_display_pipe * pipe,struct drm_crtc_state * crtc_state,struct drm_plane_state * plane_state)439 static void bochs_pipe_enable(struct drm_simple_display_pipe *pipe,
440 struct drm_crtc_state *crtc_state,
441 struct drm_plane_state *plane_state)
442 {
443 struct bochs_device *bochs = pipe->crtc.dev->dev_private;
444
445 bochs_hw_setmode(bochs, &crtc_state->mode);
446 bochs_plane_update(bochs, plane_state);
447 }
448
bochs_pipe_disable(struct drm_simple_display_pipe * pipe)449 static void bochs_pipe_disable(struct drm_simple_display_pipe *pipe)
450 {
451 struct bochs_device *bochs = pipe->crtc.dev->dev_private;
452
453 bochs_hw_blank(bochs, true);
454 }
455
bochs_pipe_update(struct drm_simple_display_pipe * pipe,struct drm_plane_state * old_state)456 static void bochs_pipe_update(struct drm_simple_display_pipe *pipe,
457 struct drm_plane_state *old_state)
458 {
459 struct bochs_device *bochs = pipe->crtc.dev->dev_private;
460
461 bochs_plane_update(bochs, pipe->plane.state);
462 }
463
464 static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = {
465 .enable = bochs_pipe_enable,
466 .disable = bochs_pipe_disable,
467 .update = bochs_pipe_update,
468 .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb,
469 .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb,
470 };
471
bochs_connector_get_modes(struct drm_connector * connector)472 static int bochs_connector_get_modes(struct drm_connector *connector)
473 {
474 struct bochs_device *bochs =
475 container_of(connector, struct bochs_device, connector);
476 int count = 0;
477
478 if (bochs->edid)
479 count = drm_add_edid_modes(connector, bochs->edid);
480
481 if (!count) {
482 count = drm_add_modes_noedid(connector, 8192, 8192);
483 drm_set_preferred_mode(connector, defx, defy);
484 }
485 return count;
486 }
487
488 static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
489 .get_modes = bochs_connector_get_modes,
490 };
491
492 static const struct drm_connector_funcs bochs_connector_connector_funcs = {
493 .fill_modes = drm_helper_probe_single_connector_modes,
494 .destroy = drm_connector_cleanup,
495 .reset = drm_atomic_helper_connector_reset,
496 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
497 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
498 };
499
bochs_connector_init(struct drm_device * dev)500 static void bochs_connector_init(struct drm_device *dev)
501 {
502 struct bochs_device *bochs = dev->dev_private;
503 struct drm_connector *connector = &bochs->connector;
504
505 drm_connector_init(dev, connector, &bochs_connector_connector_funcs,
506 DRM_MODE_CONNECTOR_VIRTUAL);
507 drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs);
508
509 bochs_hw_load_edid(bochs);
510 if (bochs->edid) {
511 DRM_INFO("Found EDID data blob.\n");
512 drm_connector_attach_edid_property(connector);
513 drm_connector_update_edid_property(connector, bochs->edid);
514 }
515 }
516
517 static struct drm_framebuffer *
bochs_gem_fb_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)518 bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file,
519 const struct drm_mode_fb_cmd2 *mode_cmd)
520 {
521 if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 &&
522 mode_cmd->pixel_format != DRM_FORMAT_BGRX8888)
523 return ERR_PTR(-EINVAL);
524
525 return drm_gem_fb_create(dev, file, mode_cmd);
526 }
527
528 static const struct drm_mode_config_funcs bochs_mode_funcs = {
529 .fb_create = bochs_gem_fb_create,
530 .mode_valid = drm_vram_helper_mode_valid,
531 .atomic_check = drm_atomic_helper_check,
532 .atomic_commit = drm_atomic_helper_commit,
533 };
534
bochs_kms_init(struct bochs_device * bochs)535 static int bochs_kms_init(struct bochs_device *bochs)
536 {
537 int ret;
538
539 ret = drmm_mode_config_init(bochs->dev);
540 if (ret)
541 return ret;
542
543 bochs->dev->mode_config.max_width = 8192;
544 bochs->dev->mode_config.max_height = 8192;
545
546 bochs->dev->mode_config.preferred_depth = 24;
547 bochs->dev->mode_config.prefer_shadow = 0;
548 bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;
549
550 bochs->dev->mode_config.funcs = &bochs_mode_funcs;
551
552 bochs_connector_init(bochs->dev);
553 drm_simple_display_pipe_init(bochs->dev,
554 &bochs->pipe,
555 &bochs_pipe_funcs,
556 bochs_formats,
557 ARRAY_SIZE(bochs_formats),
558 NULL,
559 &bochs->connector);
560
561 drm_mode_config_reset(bochs->dev);
562
563 return 0;
564 }
565
566 /* ---------------------------------------------------------------------- */
567 /* drm interface */
568
bochs_load(struct drm_device * dev)569 static int bochs_load(struct drm_device *dev)
570 {
571 struct bochs_device *bochs;
572 int ret;
573
574 bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
575 if (bochs == NULL)
576 return -ENOMEM;
577 dev->dev_private = bochs;
578 bochs->dev = dev;
579
580 ret = bochs_hw_init(dev);
581 if (ret)
582 return ret;
583
584 ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size);
585 if (ret)
586 goto err_hw_fini;
587
588 ret = bochs_kms_init(bochs);
589 if (ret)
590 goto err_hw_fini;
591
592 return 0;
593
594 err_hw_fini:
595 bochs_hw_fini(dev);
596 return ret;
597 }
598
599 DEFINE_DRM_GEM_FOPS(bochs_fops);
600
601 static const struct drm_driver bochs_driver = {
602 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
603 .fops = &bochs_fops,
604 .name = "bochs-drm",
605 .desc = "bochs dispi vga interface (qemu stdvga)",
606 .date = "20130925",
607 .major = 1,
608 .minor = 0,
609 DRM_GEM_VRAM_DRIVER,
610 };
611
612 /* ---------------------------------------------------------------------- */
613 /* pm interface */
614
615 #ifdef CONFIG_PM_SLEEP
bochs_pm_suspend(struct device * dev)616 static int bochs_pm_suspend(struct device *dev)
617 {
618 struct drm_device *drm_dev = dev_get_drvdata(dev);
619
620 return drm_mode_config_helper_suspend(drm_dev);
621 }
622
bochs_pm_resume(struct device * dev)623 static int bochs_pm_resume(struct device *dev)
624 {
625 struct drm_device *drm_dev = dev_get_drvdata(dev);
626
627 return drm_mode_config_helper_resume(drm_dev);
628 }
629 #endif
630
631 static const struct dev_pm_ops bochs_pm_ops = {
632 SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
633 bochs_pm_resume)
634 };
635
636 /* ---------------------------------------------------------------------- */
637 /* pci interface */
638
bochs_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)639 static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
640 {
641 struct drm_device *dev;
642 unsigned long fbsize;
643 int ret;
644
645 fbsize = pci_resource_len(pdev, 0);
646 if (fbsize < 4 * 1024 * 1024) {
647 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
648 return -ENOMEM;
649 }
650
651 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver);
652 if (ret)
653 return ret;
654
655 dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
656 if (IS_ERR(dev))
657 return PTR_ERR(dev);
658
659 ret = pcim_enable_device(pdev);
660 if (ret)
661 goto err_free_dev;
662
663 pci_set_drvdata(pdev, dev);
664
665 ret = bochs_load(dev);
666 if (ret)
667 goto err_free_dev;
668
669 ret = drm_dev_register(dev, 0);
670 if (ret)
671 goto err_hw_fini;
672
673 drm_fbdev_generic_setup(dev, 32);
674 return ret;
675
676 err_hw_fini:
677 bochs_hw_fini(dev);
678 err_free_dev:
679 drm_dev_put(dev);
680 return ret;
681 }
682
bochs_pci_remove(struct pci_dev * pdev)683 static void bochs_pci_remove(struct pci_dev *pdev)
684 {
685 struct drm_device *dev = pci_get_drvdata(pdev);
686
687 drm_dev_unplug(dev);
688 drm_atomic_helper_shutdown(dev);
689 bochs_hw_fini(dev);
690 drm_dev_put(dev);
691 }
692
693 static const struct pci_device_id bochs_pci_tbl[] = {
694 {
695 .vendor = 0x1234,
696 .device = 0x1111,
697 .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
698 .subdevice = PCI_SUBDEVICE_ID_QEMU,
699 .driver_data = BOCHS_QEMU_STDVGA,
700 },
701 {
702 .vendor = 0x1234,
703 .device = 0x1111,
704 .subvendor = PCI_ANY_ID,
705 .subdevice = PCI_ANY_ID,
706 .driver_data = BOCHS_UNKNOWN,
707 },
708 {
709 .vendor = 0x4321,
710 .device = 0x1111,
711 .subvendor = PCI_ANY_ID,
712 .subdevice = PCI_ANY_ID,
713 .driver_data = BOCHS_SIMICS,
714 },
715 { /* end of list */ }
716 };
717
718 static struct pci_driver bochs_pci_driver = {
719 .name = "bochs-drm",
720 .id_table = bochs_pci_tbl,
721 .probe = bochs_pci_probe,
722 .remove = bochs_pci_remove,
723 .driver.pm = &bochs_pm_ops,
724 };
725
726 /* ---------------------------------------------------------------------- */
727 /* module init/exit */
728
729 drm_module_pci_driver_if_modeset(bochs_pci_driver, bochs_modeset);
730
731 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
732 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
733 MODULE_LICENSE("GPL");
734