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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2012-2019 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 * Dave Airlie
11 * Gerd Hoffmann
12 *
13 * Portions of this code derived from cirrusfb.c:
14 * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
15 *
16 * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
17 */
18
19#include <linux/aperture.h>
20#include <linux/iosys-map.h>
21#include <linux/module.h>
22#include <linux/pci.h>
23
24#include <video/cirrus.h>
25#include <video/vga.h>
26
27#include <drm/drm_atomic.h>
28#include <drm/drm_atomic_helper.h>
29#include <drm/drm_atomic_state_helper.h>
30#include <drm/drm_client_setup.h>
31#include <drm/drm_connector.h>
32#include <drm/drm_damage_helper.h>
33#include <drm/drm_drv.h>
34#include <drm/drm_edid.h>
35#include <drm/drm_fbdev_shmem.h>
36#include <drm/drm_file.h>
37#include <drm/drm_format_helper.h>
38#include <drm/drm_fourcc.h>
39#include <drm/drm_framebuffer.h>
40#include <drm/drm_gem_atomic_helper.h>
41#include <drm/drm_gem_framebuffer_helper.h>
42#include <drm/drm_gem_shmem_helper.h>
43#include <drm/drm_ioctl.h>
44#include <drm/drm_managed.h>
45#include <drm/drm_modeset_helper_vtables.h>
46#include <drm/drm_module.h>
47#include <drm/drm_probe_helper.h>
48
49#define DRIVER_NAME "cirrus"
50#define DRIVER_DESC "qemu cirrus vga"
51#define DRIVER_DATE "2019"
52#define DRIVER_MAJOR 2
53#define DRIVER_MINOR 0
54
55#define CIRRUS_MAX_PITCH (0x1FF << 3) /* (4096 - 1) & ~111b bytes */
56#define CIRRUS_VRAM_SIZE (4 * 1024 * 1024) /* 4 MB */
57
58struct cirrus_device {
59 struct drm_device dev;
60
61 /* modesetting pipeline */
62 struct drm_plane primary_plane;
63 struct drm_crtc crtc;
64 struct drm_encoder encoder;
65 struct drm_connector connector;
66
67 /* HW resources */
68 void __iomem *vram;
69 void __iomem *mmio;
70};
71
72#define to_cirrus(_dev) container_of(_dev, struct cirrus_device, dev)
73
74struct cirrus_primary_plane_state {
75 struct drm_shadow_plane_state base;
76
77 /* HW scanout buffer */
78 const struct drm_format_info *format;
79 unsigned int pitch;
80};
81
82static inline struct cirrus_primary_plane_state *
83to_cirrus_primary_plane_state(struct drm_plane_state *plane_state)
84{
85 return container_of(plane_state, struct cirrus_primary_plane_state, base.base);
86};
87
88/* ------------------------------------------------------------------ */
89/*
90 * The meat of this driver. The core passes us a mode and we have to program
91 * it. The modesetting here is the bare minimum required to satisfy the qemu
92 * emulation of this hardware, and running this against a real device is
93 * likely to result in an inadequately programmed mode. We've already had
94 * the opportunity to modify the mode, so whatever we receive here should
95 * be something that can be correctly programmed and displayed
96 */
97
98#define SEQ_INDEX 4
99#define SEQ_DATA 5
100
101static u8 rreg_seq(struct cirrus_device *cirrus, u8 reg)
102{
103 iowrite8(reg, cirrus->mmio + SEQ_INDEX);
104 return ioread8(cirrus->mmio + SEQ_DATA);
105}
106
107static void wreg_seq(struct cirrus_device *cirrus, u8 reg, u8 val)
108{
109 iowrite8(reg, cirrus->mmio + SEQ_INDEX);
110 iowrite8(val, cirrus->mmio + SEQ_DATA);
111}
112
113#define CRT_INDEX 0x14
114#define CRT_DATA 0x15
115
116static u8 rreg_crt(struct cirrus_device *cirrus, u8 reg)
117{
118 iowrite8(reg, cirrus->mmio + CRT_INDEX);
119 return ioread8(cirrus->mmio + CRT_DATA);
120}
121
122static void wreg_crt(struct cirrus_device *cirrus, u8 reg, u8 val)
123{
124 iowrite8(reg, cirrus->mmio + CRT_INDEX);
125 iowrite8(val, cirrus->mmio + CRT_DATA);
126}
127
128#define GFX_INDEX 0xe
129#define GFX_DATA 0xf
130
131static void wreg_gfx(struct cirrus_device *cirrus, u8 reg, u8 val)
132{
133 iowrite8(reg, cirrus->mmio + GFX_INDEX);
134 iowrite8(val, cirrus->mmio + GFX_DATA);
135}
136
137#define VGA_DAC_MASK 0x06
138
139static void wreg_hdr(struct cirrus_device *cirrus, u8 val)
140{
141 ioread8(cirrus->mmio + VGA_DAC_MASK);
142 ioread8(cirrus->mmio + VGA_DAC_MASK);
143 ioread8(cirrus->mmio + VGA_DAC_MASK);
144 ioread8(cirrus->mmio + VGA_DAC_MASK);
145 iowrite8(val, cirrus->mmio + VGA_DAC_MASK);
146}
147
148static const struct drm_format_info *cirrus_convert_to(struct drm_framebuffer *fb)
149{
150 if (fb->format->format == DRM_FORMAT_XRGB8888 && fb->pitches[0] > CIRRUS_MAX_PITCH) {
151 if (fb->width * 3 <= CIRRUS_MAX_PITCH)
152 /* convert from XR24 to RG24 */
153 return drm_format_info(DRM_FORMAT_RGB888);
154 else
155 /* convert from XR24 to RG16 */
156 return drm_format_info(DRM_FORMAT_RGB565);
157 }
158 return NULL;
159}
160
161static const struct drm_format_info *cirrus_format(struct drm_framebuffer *fb)
162{
163 const struct drm_format_info *format = cirrus_convert_to(fb);
164
165 if (format)
166 return format;
167 return fb->format;
168}
169
170static int cirrus_pitch(struct drm_framebuffer *fb)
171{
172 const struct drm_format_info *format = cirrus_convert_to(fb);
173
174 if (format)
175 return drm_format_info_min_pitch(format, 0, fb->width);
176 return fb->pitches[0];
177}
178
179static void cirrus_set_start_address(struct cirrus_device *cirrus, u32 offset)
180{
181 u32 addr;
182 u8 tmp;
183
184 addr = offset >> 2;
185 wreg_crt(cirrus, 0x0c, (u8)((addr >> 8) & 0xff));
186 wreg_crt(cirrus, 0x0d, (u8)(addr & 0xff));
187
188 tmp = rreg_crt(cirrus, 0x1b);
189 tmp &= 0xf2;
190 tmp |= (addr >> 16) & 0x01;
191 tmp |= (addr >> 15) & 0x0c;
192 wreg_crt(cirrus, 0x1b, tmp);
193
194 tmp = rreg_crt(cirrus, 0x1d);
195 tmp &= 0x7f;
196 tmp |= (addr >> 12) & 0x80;
197 wreg_crt(cirrus, 0x1d, tmp);
198}
199
200static void cirrus_mode_set(struct cirrus_device *cirrus,
201 struct drm_display_mode *mode)
202{
203 int hsyncstart, hsyncend, htotal, hdispend;
204 int vtotal, vdispend;
205 int tmp;
206
207 htotal = mode->htotal / 8;
208 hsyncend = mode->hsync_end / 8;
209 hsyncstart = mode->hsync_start / 8;
210 hdispend = mode->hdisplay / 8;
211
212 vtotal = mode->vtotal;
213 vdispend = mode->vdisplay;
214
215 vdispend -= 1;
216 vtotal -= 2;
217
218 htotal -= 5;
219 hdispend -= 1;
220 hsyncstart += 1;
221 hsyncend += 1;
222
223 wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20);
224 wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal);
225 wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend);
226 wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart);
227 wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend);
228 wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff);
229 wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff);
230
231 tmp = 0x40;
232 if ((vdispend + 1) & 512)
233 tmp |= 0x20;
234 wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);
235
236 /*
237 * Overflow bits for values that don't fit in the standard registers
238 */
239 tmp = 0x10;
240 if (vtotal & 0x100)
241 tmp |= 0x01;
242 if (vdispend & 0x100)
243 tmp |= 0x02;
244 if ((vdispend + 1) & 0x100)
245 tmp |= 0x08;
246 if (vtotal & 0x200)
247 tmp |= 0x20;
248 if (vdispend & 0x200)
249 tmp |= 0x40;
250 wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp);
251
252 tmp = 0;
253
254 /* More overflow bits */
255
256 if ((htotal + 5) & 0x40)
257 tmp |= 0x10;
258 if ((htotal + 5) & 0x80)
259 tmp |= 0x20;
260 if (vtotal & 0x100)
261 tmp |= 0x40;
262 if (vtotal & 0x200)
263 tmp |= 0x80;
264
265 wreg_crt(cirrus, CL_CRT1A, tmp);
266
267 /* Disable Hercules/CGA compatibility */
268 wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);
269}
270
271static void cirrus_format_set(struct cirrus_device *cirrus,
272 const struct drm_format_info *format)
273{
274 u8 sr07, hdr;
275
276 sr07 = rreg_seq(cirrus, 0x07);
277 sr07 &= 0xe0;
278
279 switch (format->format) {
280 case DRM_FORMAT_C8:
281 sr07 |= 0x11;
282 hdr = 0x00;
283 break;
284 case DRM_FORMAT_RGB565:
285 sr07 |= 0x17;
286 hdr = 0xc1;
287 break;
288 case DRM_FORMAT_RGB888:
289 sr07 |= 0x15;
290 hdr = 0xc5;
291 break;
292 case DRM_FORMAT_XRGB8888:
293 sr07 |= 0x19;
294 hdr = 0xc5;
295 break;
296 default:
297 return;
298 }
299
300 wreg_seq(cirrus, 0x7, sr07);
301
302 /* Enable high-colour modes */
303 wreg_gfx(cirrus, VGA_GFX_MODE, 0x40);
304
305 /* And set graphics mode */
306 wreg_gfx(cirrus, VGA_GFX_MISC, 0x01);
307
308 wreg_hdr(cirrus, hdr);
309}
310
311static void cirrus_pitch_set(struct cirrus_device *cirrus, unsigned int pitch)
312{
313 u8 cr13, cr1b;
314
315 /* Program the pitch */
316 cr13 = pitch / 8;
317 wreg_crt(cirrus, VGA_CRTC_OFFSET, cr13);
318
319 /* Enable extended blanking and pitch bits, and enable full memory */
320 cr1b = 0x22;
321 cr1b |= (pitch >> 7) & 0x10;
322 cr1b |= (pitch >> 6) & 0x40;
323 wreg_crt(cirrus, 0x1b, cr1b);
324
325 cirrus_set_start_address(cirrus, 0);
326}
327
328/* ------------------------------------------------------------------ */
329/* cirrus display pipe */
330
331static const uint32_t cirrus_primary_plane_formats[] = {
332 DRM_FORMAT_RGB565,
333 DRM_FORMAT_RGB888,
334 DRM_FORMAT_XRGB8888,
335};
336
337static const uint64_t cirrus_primary_plane_format_modifiers[] = {
338 DRM_FORMAT_MOD_LINEAR,
339 DRM_FORMAT_MOD_INVALID
340};
341
342static int cirrus_primary_plane_helper_atomic_check(struct drm_plane *plane,
343 struct drm_atomic_state *state)
344{
345 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
346 struct cirrus_primary_plane_state *new_primary_plane_state =
347 to_cirrus_primary_plane_state(new_plane_state);
348 struct drm_framebuffer *fb = new_plane_state->fb;
349 struct drm_crtc *new_crtc = new_plane_state->crtc;
350 struct drm_crtc_state *new_crtc_state = NULL;
351 int ret;
352 unsigned int pitch;
353
354 if (new_crtc)
355 new_crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
356
357 ret = drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state,
358 DRM_PLANE_NO_SCALING,
359 DRM_PLANE_NO_SCALING,
360 false, false);
361 if (ret)
362 return ret;
363 else if (!new_plane_state->visible)
364 return 0;
365
366 pitch = cirrus_pitch(fb);
367
368 /* validate size constraints */
369 if (pitch > CIRRUS_MAX_PITCH)
370 return -EINVAL;
371 else if (pitch * fb->height > CIRRUS_VRAM_SIZE)
372 return -EINVAL;
373
374 new_primary_plane_state->format = cirrus_format(fb);
375 new_primary_plane_state->pitch = pitch;
376
377 return 0;
378}
379
380static void cirrus_primary_plane_helper_atomic_update(struct drm_plane *plane,
381 struct drm_atomic_state *state)
382{
383 struct cirrus_device *cirrus = to_cirrus(plane->dev);
384 struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
385 struct cirrus_primary_plane_state *primary_plane_state =
386 to_cirrus_primary_plane_state(plane_state);
387 struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
388 struct drm_framebuffer *fb = plane_state->fb;
389 const struct drm_format_info *format = primary_plane_state->format;
390 unsigned int pitch = primary_plane_state->pitch;
391 struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
392 struct cirrus_primary_plane_state *old_primary_plane_state =
393 to_cirrus_primary_plane_state(old_plane_state);
394 struct iosys_map vaddr = IOSYS_MAP_INIT_VADDR_IOMEM(cirrus->vram);
395 struct drm_atomic_helper_damage_iter iter;
396 struct drm_rect damage;
397 int idx;
398
399 if (!fb)
400 return;
401
402 if (!drm_dev_enter(&cirrus->dev, &idx))
403 return;
404
405 if (old_primary_plane_state->format != format)
406 cirrus_format_set(cirrus, format);
407 if (old_primary_plane_state->pitch != pitch)
408 cirrus_pitch_set(cirrus, pitch);
409
410 drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
411 drm_atomic_for_each_plane_damage(&iter, &damage) {
412 unsigned int offset = drm_fb_clip_offset(pitch, format, &damage);
413 struct iosys_map dst = IOSYS_MAP_INIT_OFFSET(&vaddr, offset);
414
415 drm_fb_blit(&dst, &pitch, format->format, shadow_plane_state->data, fb,
416 &damage, &shadow_plane_state->fmtcnv_state);
417 }
418
419 drm_dev_exit(idx);
420}
421
422static const struct drm_plane_helper_funcs cirrus_primary_plane_helper_funcs = {
423 DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
424 .atomic_check = cirrus_primary_plane_helper_atomic_check,
425 .atomic_update = cirrus_primary_plane_helper_atomic_update,
426};
427
428static struct drm_plane_state *
429cirrus_primary_plane_atomic_duplicate_state(struct drm_plane *plane)
430{
431 struct drm_plane_state *plane_state = plane->state;
432 struct cirrus_primary_plane_state *primary_plane_state =
433 to_cirrus_primary_plane_state(plane_state);
434 struct cirrus_primary_plane_state *new_primary_plane_state;
435 struct drm_shadow_plane_state *new_shadow_plane_state;
436
437 if (!plane_state)
438 return NULL;
439
440 new_primary_plane_state = kzalloc(sizeof(*new_primary_plane_state), GFP_KERNEL);
441 if (!new_primary_plane_state)
442 return NULL;
443 new_shadow_plane_state = &new_primary_plane_state->base;
444
445 __drm_gem_duplicate_shadow_plane_state(plane, new_shadow_plane_state);
446 new_primary_plane_state->format = primary_plane_state->format;
447 new_primary_plane_state->pitch = primary_plane_state->pitch;
448
449 return &new_shadow_plane_state->base;
450}
451
452static void cirrus_primary_plane_atomic_destroy_state(struct drm_plane *plane,
453 struct drm_plane_state *plane_state)
454{
455 struct cirrus_primary_plane_state *primary_plane_state =
456 to_cirrus_primary_plane_state(plane_state);
457
458 __drm_gem_destroy_shadow_plane_state(&primary_plane_state->base);
459 kfree(primary_plane_state);
460}
461
462static void cirrus_reset_primary_plane(struct drm_plane *plane)
463{
464 struct cirrus_primary_plane_state *primary_plane_state;
465
466 if (plane->state) {
467 cirrus_primary_plane_atomic_destroy_state(plane, plane->state);
468 plane->state = NULL; /* must be set to NULL here */
469 }
470
471 primary_plane_state = kzalloc(sizeof(*primary_plane_state), GFP_KERNEL);
472 if (!primary_plane_state)
473 return;
474 __drm_gem_reset_shadow_plane(plane, &primary_plane_state->base);
475}
476
477static const struct drm_plane_funcs cirrus_primary_plane_funcs = {
478 .update_plane = drm_atomic_helper_update_plane,
479 .disable_plane = drm_atomic_helper_disable_plane,
480 .destroy = drm_plane_cleanup,
481 .reset = cirrus_reset_primary_plane,
482 .atomic_duplicate_state = cirrus_primary_plane_atomic_duplicate_state,
483 .atomic_destroy_state = cirrus_primary_plane_atomic_destroy_state,
484};
485
486static int cirrus_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
487{
488 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
489 int ret;
490
491 if (!crtc_state->enable)
492 return 0;
493
494 ret = drm_atomic_helper_check_crtc_primary_plane(crtc_state);
495 if (ret)
496 return ret;
497
498 return 0;
499}
500
501static void cirrus_crtc_helper_atomic_enable(struct drm_crtc *crtc,
502 struct drm_atomic_state *state)
503{
504 struct cirrus_device *cirrus = to_cirrus(crtc->dev);
505 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
506 int idx;
507
508 if (!drm_dev_enter(&cirrus->dev, &idx))
509 return;
510
511 cirrus_mode_set(cirrus, &crtc_state->mode);
512
513#ifdef CONFIG_HAS_IOPORT
514 /* Unblank (needed on S3 resume, vgabios doesn't do it then) */
515 outb(VGA_AR_ENABLE_DISPLAY, VGA_ATT_W);
516#endif
517
518 drm_dev_exit(idx);
519}
520
521static const struct drm_crtc_helper_funcs cirrus_crtc_helper_funcs = {
522 .atomic_check = cirrus_crtc_helper_atomic_check,
523 .atomic_enable = cirrus_crtc_helper_atomic_enable,
524};
525
526static const struct drm_crtc_funcs cirrus_crtc_funcs = {
527 .reset = drm_atomic_helper_crtc_reset,
528 .destroy = drm_crtc_cleanup,
529 .set_config = drm_atomic_helper_set_config,
530 .page_flip = drm_atomic_helper_page_flip,
531 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
532 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
533};
534
535static const struct drm_encoder_funcs cirrus_encoder_funcs = {
536 .destroy = drm_encoder_cleanup,
537};
538
539static int cirrus_connector_helper_get_modes(struct drm_connector *connector)
540{
541 int count;
542
543 count = drm_add_modes_noedid(connector,
544 connector->dev->mode_config.max_width,
545 connector->dev->mode_config.max_height);
546 drm_set_preferred_mode(connector, 1024, 768);
547 return count;
548}
549
550static const struct drm_connector_helper_funcs cirrus_connector_helper_funcs = {
551 .get_modes = cirrus_connector_helper_get_modes,
552};
553
554static const struct drm_connector_funcs cirrus_connector_funcs = {
555 .fill_modes = drm_helper_probe_single_connector_modes,
556 .destroy = drm_connector_cleanup,
557 .reset = drm_atomic_helper_connector_reset,
558 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
559 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
560};
561
562static int cirrus_pipe_init(struct cirrus_device *cirrus)
563{
564 struct drm_device *dev = &cirrus->dev;
565 struct drm_plane *primary_plane;
566 struct drm_crtc *crtc;
567 struct drm_encoder *encoder;
568 struct drm_connector *connector;
569 int ret;
570
571 primary_plane = &cirrus->primary_plane;
572 ret = drm_universal_plane_init(dev, primary_plane, 0,
573 &cirrus_primary_plane_funcs,
574 cirrus_primary_plane_formats,
575 ARRAY_SIZE(cirrus_primary_plane_formats),
576 cirrus_primary_plane_format_modifiers,
577 DRM_PLANE_TYPE_PRIMARY, NULL);
578 if (ret)
579 return ret;
580 drm_plane_helper_add(primary_plane, &cirrus_primary_plane_helper_funcs);
581 drm_plane_enable_fb_damage_clips(primary_plane);
582
583 crtc = &cirrus->crtc;
584 ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
585 &cirrus_crtc_funcs, NULL);
586 if (ret)
587 return ret;
588 drm_crtc_helper_add(crtc, &cirrus_crtc_helper_funcs);
589
590 encoder = &cirrus->encoder;
591 ret = drm_encoder_init(dev, encoder, &cirrus_encoder_funcs,
592 DRM_MODE_ENCODER_DAC, NULL);
593 if (ret)
594 return ret;
595 encoder->possible_crtcs = drm_crtc_mask(crtc);
596
597 connector = &cirrus->connector;
598 ret = drm_connector_init(dev, connector, &cirrus_connector_funcs,
599 DRM_MODE_CONNECTOR_VGA);
600 if (ret)
601 return ret;
602 drm_connector_helper_add(connector, &cirrus_connector_helper_funcs);
603
604 ret = drm_connector_attach_encoder(connector, encoder);
605 if (ret)
606 return ret;
607
608 return 0;
609}
610
611/* ------------------------------------------------------------------ */
612/* cirrus framebuffers & mode config */
613
614static enum drm_mode_status cirrus_mode_config_mode_valid(struct drm_device *dev,
615 const struct drm_display_mode *mode)
616{
617 const struct drm_format_info *format = drm_format_info(DRM_FORMAT_XRGB8888);
618 uint64_t pitch = drm_format_info_min_pitch(format, 0, mode->hdisplay);
619
620 if (pitch * mode->vdisplay > CIRRUS_VRAM_SIZE)
621 return MODE_MEM;
622
623 return MODE_OK;
624}
625
626static const struct drm_mode_config_funcs cirrus_mode_config_funcs = {
627 .fb_create = drm_gem_fb_create_with_dirty,
628 .mode_valid = cirrus_mode_config_mode_valid,
629 .atomic_check = drm_atomic_helper_check,
630 .atomic_commit = drm_atomic_helper_commit,
631};
632
633static int cirrus_mode_config_init(struct cirrus_device *cirrus)
634{
635 struct drm_device *dev = &cirrus->dev;
636 int ret;
637
638 ret = drmm_mode_config_init(dev);
639 if (ret)
640 return ret;
641
642 dev->mode_config.min_width = 0;
643 dev->mode_config.min_height = 0;
644 dev->mode_config.max_width = CIRRUS_MAX_PITCH / 2;
645 dev->mode_config.max_height = 1024;
646 dev->mode_config.preferred_depth = 16;
647 dev->mode_config.prefer_shadow = 0;
648 dev->mode_config.funcs = &cirrus_mode_config_funcs;
649
650 return 0;
651}
652
653/* ------------------------------------------------------------------ */
654
655DEFINE_DRM_GEM_FOPS(cirrus_fops);
656
657static const struct drm_driver cirrus_driver = {
658 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
659
660 .name = DRIVER_NAME,
661 .desc = DRIVER_DESC,
662 .date = DRIVER_DATE,
663 .major = DRIVER_MAJOR,
664 .minor = DRIVER_MINOR,
665
666 .fops = &cirrus_fops,
667 DRM_GEM_SHMEM_DRIVER_OPS,
668 DRM_FBDEV_SHMEM_DRIVER_OPS,
669};
670
671static int cirrus_pci_probe(struct pci_dev *pdev,
672 const struct pci_device_id *ent)
673{
674 struct drm_device *dev;
675 struct cirrus_device *cirrus;
676 int ret;
677
678 ret = aperture_remove_conflicting_pci_devices(pdev, cirrus_driver.name);
679 if (ret)
680 return ret;
681
682 ret = pcim_enable_device(pdev);
683 if (ret)
684 return ret;
685
686 ret = pci_request_regions(pdev, DRIVER_NAME);
687 if (ret)
688 return ret;
689
690 ret = -ENOMEM;
691 cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver,
692 struct cirrus_device, dev);
693 if (IS_ERR(cirrus))
694 return PTR_ERR(cirrus);
695
696 dev = &cirrus->dev;
697
698 cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0),
699 pci_resource_len(pdev, 0));
700 if (cirrus->vram == NULL)
701 return -ENOMEM;
702
703 cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1),
704 pci_resource_len(pdev, 1));
705 if (cirrus->mmio == NULL)
706 return -ENOMEM;
707
708 ret = cirrus_mode_config_init(cirrus);
709 if (ret)
710 return ret;
711
712 ret = cirrus_pipe_init(cirrus);
713 if (ret < 0)
714 return ret;
715
716 drm_mode_config_reset(dev);
717
718 pci_set_drvdata(pdev, dev);
719 ret = drm_dev_register(dev, 0);
720 if (ret)
721 return ret;
722
723 drm_client_setup(dev, NULL);
724 return 0;
725}
726
727static void cirrus_pci_remove(struct pci_dev *pdev)
728{
729 struct drm_device *dev = pci_get_drvdata(pdev);
730
731 drm_dev_unplug(dev);
732 drm_atomic_helper_shutdown(dev);
733}
734
735static void cirrus_pci_shutdown(struct pci_dev *pdev)
736{
737 drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
738}
739
740static const struct pci_device_id pciidlist[] = {
741 {
742 .vendor = PCI_VENDOR_ID_CIRRUS,
743 .device = PCI_DEVICE_ID_CIRRUS_5446,
744 /* only bind to the cirrus chip in qemu */
745 .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
746 .subdevice = PCI_SUBDEVICE_ID_QEMU,
747 }, {
748 .vendor = PCI_VENDOR_ID_CIRRUS,
749 .device = PCI_DEVICE_ID_CIRRUS_5446,
750 .subvendor = PCI_VENDOR_ID_XEN,
751 .subdevice = 0x0001,
752 },
753 { /* end if list */ }
754};
755
756static struct pci_driver cirrus_pci_driver = {
757 .name = DRIVER_NAME,
758 .id_table = pciidlist,
759 .probe = cirrus_pci_probe,
760 .remove = cirrus_pci_remove,
761 .shutdown = cirrus_pci_shutdown,
762};
763
764drm_module_pci_driver(cirrus_pci_driver)
765
766MODULE_DEVICE_TABLE(pci, pciidlist);
767MODULE_DESCRIPTION("Cirrus driver for QEMU emulated device");
768MODULE_LICENSE("GPL");