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1// SPDX-License-Identifier: GPL-2.0-only
2/**************************************************************************
3 * Copyright (c) 2007-2011, Intel Corporation.
4 * All Rights Reserved.
5 *
6 **************************************************************************/
7
8#include <linux/console.h>
9#include <linux/delay.h>
10#include <linux/errno.h>
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/module.h>
15#include <linux/pfn_t.h>
16#include <linux/slab.h>
17#include <linux/string.h>
18#include <linux/tty.h>
19
20#include <drm/drm.h>
21#include <drm/drm_crtc.h>
22#include <drm/drm_fb_helper.h>
23#include <drm/drm_fourcc.h>
24#include <drm/drm_gem_framebuffer_helper.h>
25
26#include "framebuffer.h"
27#include "gem.h"
28#include "gtt.h"
29#include "psb_drv.h"
30#include "psb_intel_drv.h"
31#include "psb_intel_reg.h"
32
33static const struct drm_framebuffer_funcs psb_fb_funcs = {
34 .destroy = drm_gem_fb_destroy,
35 .create_handle = drm_gem_fb_create_handle,
36};
37
38#define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
39
40static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
41 unsigned blue, unsigned transp,
42 struct fb_info *info)
43{
44 struct drm_fb_helper *fb_helper = info->par;
45 struct drm_framebuffer *fb = fb_helper->fb;
46 uint32_t v;
47
48 if (!fb)
49 return -ENOMEM;
50
51 if (regno > 255)
52 return 1;
53
54 red = CMAP_TOHW(red, info->var.red.length);
55 blue = CMAP_TOHW(blue, info->var.blue.length);
56 green = CMAP_TOHW(green, info->var.green.length);
57 transp = CMAP_TOHW(transp, info->var.transp.length);
58
59 v = (red << info->var.red.offset) |
60 (green << info->var.green.offset) |
61 (blue << info->var.blue.offset) |
62 (transp << info->var.transp.offset);
63
64 if (regno < 16) {
65 switch (fb->format->cpp[0] * 8) {
66 case 16:
67 ((uint32_t *) info->pseudo_palette)[regno] = v;
68 break;
69 case 24:
70 case 32:
71 ((uint32_t *) info->pseudo_palette)[regno] = v;
72 break;
73 }
74 }
75
76 return 0;
77}
78
79static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
80{
81 struct vm_area_struct *vma = vmf->vma;
82 struct drm_framebuffer *fb = vma->vm_private_data;
83 struct drm_device *dev = fb->dev;
84 struct drm_psb_private *dev_priv = dev->dev_private;
85 struct gtt_range *gtt = to_gtt_range(fb->obj[0]);
86 int page_num;
87 int i;
88 unsigned long address;
89 vm_fault_t ret = VM_FAULT_SIGBUS;
90 unsigned long pfn;
91 unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
92 gtt->offset;
93
94 page_num = vma_pages(vma);
95 address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
96
97 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
98
99 for (i = 0; i < page_num; i++) {
100 pfn = (phys_addr >> PAGE_SHIFT);
101
102 ret = vmf_insert_mixed(vma, address,
103 __pfn_to_pfn_t(pfn, PFN_DEV));
104 if (unlikely(ret & VM_FAULT_ERROR))
105 break;
106 address += PAGE_SIZE;
107 phys_addr += PAGE_SIZE;
108 }
109 return ret;
110}
111
112static void psbfb_vm_open(struct vm_area_struct *vma)
113{
114}
115
116static void psbfb_vm_close(struct vm_area_struct *vma)
117{
118}
119
120static const struct vm_operations_struct psbfb_vm_ops = {
121 .fault = psbfb_vm_fault,
122 .open = psbfb_vm_open,
123 .close = psbfb_vm_close
124};
125
126static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
127{
128 struct drm_fb_helper *fb_helper = info->par;
129 struct drm_framebuffer *fb = fb_helper->fb;
130
131 if (vma->vm_pgoff != 0)
132 return -EINVAL;
133 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
134 return -EINVAL;
135
136 /*
137 * If this is a GEM object then info->screen_base is the virtual
138 * kernel remapping of the object. FIXME: Review if this is
139 * suitable for our mmap work
140 */
141 vma->vm_ops = &psbfb_vm_ops;
142 vma->vm_private_data = (void *)fb;
143 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
144 return 0;
145}
146
147static const struct fb_ops psbfb_unaccel_ops = {
148 .owner = THIS_MODULE,
149 DRM_FB_HELPER_DEFAULT_OPS,
150 .fb_setcolreg = psbfb_setcolreg,
151 .fb_fillrect = drm_fb_helper_cfb_fillrect,
152 .fb_copyarea = drm_fb_helper_cfb_copyarea,
153 .fb_imageblit = drm_fb_helper_cfb_imageblit,
154 .fb_mmap = psbfb_mmap,
155};
156
157/**
158 * psb_framebuffer_init - initialize a framebuffer
159 * @dev: our DRM device
160 * @fb: framebuffer to set up
161 * @mode_cmd: mode description
162 * @obj: backing object
163 *
164 * Configure and fill in the boilerplate for our frame buffer. Return
165 * 0 on success or an error code if we fail.
166 */
167static int psb_framebuffer_init(struct drm_device *dev,
168 struct drm_framebuffer *fb,
169 const struct drm_mode_fb_cmd2 *mode_cmd,
170 struct drm_gem_object *obj)
171{
172 const struct drm_format_info *info;
173 int ret;
174
175 /*
176 * Reject unknown formats, YUV formats, and formats with more than
177 * 4 bytes per pixel.
178 */
179 info = drm_get_format_info(dev, mode_cmd);
180 if (!info || !info->depth || info->cpp[0] > 4)
181 return -EINVAL;
182
183 if (mode_cmd->pitches[0] & 63)
184 return -EINVAL;
185
186 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
187 fb->obj[0] = obj;
188 ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
189 if (ret) {
190 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
191 return ret;
192 }
193 return 0;
194}
195
196/**
197 * psb_framebuffer_create - create a framebuffer backed by gt
198 * @dev: our DRM device
199 * @mode_cmd: the description of the requested mode
200 * @obj: the backing object
201 *
202 * Create a framebuffer object backed by the gt, and fill in the
203 * boilerplate required
204 *
205 * TODO: review object references
206 */
207
208static struct drm_framebuffer *psb_framebuffer_create
209 (struct drm_device *dev,
210 const struct drm_mode_fb_cmd2 *mode_cmd,
211 struct drm_gem_object *obj)
212{
213 struct drm_framebuffer *fb;
214 int ret;
215
216 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
217 if (!fb)
218 return ERR_PTR(-ENOMEM);
219
220 ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
221 if (ret) {
222 kfree(fb);
223 return ERR_PTR(ret);
224 }
225 return fb;
226}
227
228/**
229 * psbfb_alloc - allocate frame buffer memory
230 * @dev: the DRM device
231 * @aligned_size: space needed
232 *
233 * Allocate the frame buffer. In the usual case we get a GTT range that
234 * is stolen memory backed and life is simple. If there isn't sufficient
235 * we fail as we don't have the virtual mapping space to really vmap it
236 * and the kernel console code can't handle non linear framebuffers.
237 *
238 * Re-address this as and if the framebuffer layer grows this ability.
239 */
240static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
241{
242 struct gtt_range *backing;
243 /* Begin by trying to use stolen memory backing */
244 backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
245 if (backing) {
246 backing->gem.funcs = &psb_gem_object_funcs;
247 drm_gem_private_object_init(dev, &backing->gem, aligned_size);
248 return backing;
249 }
250 return NULL;
251}
252
253/**
254 * psbfb_create - create a framebuffer
255 * @fb_helper: the framebuffer helper
256 * @sizes: specification of the layout
257 *
258 * Create a framebuffer to the specifications provided
259 */
260static int psbfb_create(struct drm_fb_helper *fb_helper,
261 struct drm_fb_helper_surface_size *sizes)
262{
263 struct drm_device *dev = fb_helper->dev;
264 struct drm_psb_private *dev_priv = dev->dev_private;
265 struct pci_dev *pdev = to_pci_dev(dev->dev);
266 struct fb_info *info;
267 struct drm_framebuffer *fb;
268 struct drm_mode_fb_cmd2 mode_cmd;
269 int size;
270 int ret;
271 struct gtt_range *backing;
272 u32 bpp, depth;
273
274 mode_cmd.width = sizes->surface_width;
275 mode_cmd.height = sizes->surface_height;
276 bpp = sizes->surface_bpp;
277 depth = sizes->surface_depth;
278
279 /* No 24bit packed */
280 if (bpp == 24)
281 bpp = 32;
282
283 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
284
285 size = mode_cmd.pitches[0] * mode_cmd.height;
286 size = ALIGN(size, PAGE_SIZE);
287
288 /* Allocate the framebuffer in the GTT with stolen page backing */
289 backing = psbfb_alloc(dev, size);
290 if (backing == NULL)
291 return -ENOMEM;
292
293 memset(dev_priv->vram_addr + backing->offset, 0, size);
294
295 info = drm_fb_helper_alloc_fbi(fb_helper);
296 if (IS_ERR(info)) {
297 ret = PTR_ERR(info);
298 goto out;
299 }
300
301 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
302
303 fb = psb_framebuffer_create(dev, &mode_cmd, &backing->gem);
304 if (IS_ERR(fb)) {
305 ret = PTR_ERR(fb);
306 goto out;
307 }
308
309 fb_helper->fb = fb;
310
311 info->fbops = &psbfb_unaccel_ops;
312
313 info->fix.smem_start = dev->mode_config.fb_base;
314 info->fix.smem_len = size;
315 info->fix.ywrapstep = 0;
316 info->fix.ypanstep = 0;
317
318 /* Accessed stolen memory directly */
319 info->screen_base = dev_priv->vram_addr + backing->offset;
320 info->screen_size = size;
321
322 if (dev_priv->gtt.stolen_size) {
323 info->apertures->ranges[0].base = dev->mode_config.fb_base;
324 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
325 }
326
327 drm_fb_helper_fill_info(info, fb_helper, sizes);
328
329 info->fix.mmio_start = pci_resource_start(pdev, 0);
330 info->fix.mmio_len = pci_resource_len(pdev, 0);
331
332 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
333
334 dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
335
336 return 0;
337out:
338 psb_gtt_free_range(dev, backing);
339 return ret;
340}
341
342/**
343 * psb_user_framebuffer_create - create framebuffer
344 * @dev: our DRM device
345 * @filp: client file
346 * @cmd: mode request
347 *
348 * Create a new framebuffer backed by a userspace GEM object
349 */
350static struct drm_framebuffer *psb_user_framebuffer_create
351 (struct drm_device *dev, struct drm_file *filp,
352 const struct drm_mode_fb_cmd2 *cmd)
353{
354 struct drm_gem_object *obj;
355 struct drm_framebuffer *fb;
356
357 /*
358 * Find the GEM object and thus the gtt range object that is
359 * to back this space
360 */
361 obj = drm_gem_object_lookup(filp, cmd->handles[0]);
362 if (obj == NULL)
363 return ERR_PTR(-ENOENT);
364
365 /* Let the core code do all the work */
366 fb = psb_framebuffer_create(dev, cmd, obj);
367 if (IS_ERR(fb))
368 drm_gem_object_put(obj);
369
370 return fb;
371}
372
373static int psbfb_probe(struct drm_fb_helper *fb_helper,
374 struct drm_fb_helper_surface_size *sizes)
375{
376 struct drm_device *dev = fb_helper->dev;
377 struct drm_psb_private *dev_priv = dev->dev_private;
378 unsigned int fb_size;
379 int bytespp;
380
381 bytespp = sizes->surface_bpp / 8;
382 if (bytespp == 3) /* no 24bit packed */
383 bytespp = 4;
384
385 /* If the mode will not fit in 32bit then switch to 16bit to get
386 a console on full resolution. The X mode setting server will
387 allocate its own 32bit GEM framebuffer */
388 fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
389 sizes->surface_height;
390 fb_size = ALIGN(fb_size, PAGE_SIZE);
391
392 if (fb_size > dev_priv->vram_stolen_size) {
393 sizes->surface_bpp = 16;
394 sizes->surface_depth = 16;
395 }
396
397 return psbfb_create(fb_helper, sizes);
398}
399
400static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
401 .fb_probe = psbfb_probe,
402};
403
404static int psb_fbdev_destroy(struct drm_device *dev,
405 struct drm_fb_helper *fb_helper)
406{
407 struct drm_framebuffer *fb = fb_helper->fb;
408
409 drm_fb_helper_unregister_fbi(fb_helper);
410
411 drm_fb_helper_fini(fb_helper);
412 drm_framebuffer_unregister_private(fb);
413 drm_framebuffer_cleanup(fb);
414
415 if (fb->obj[0])
416 drm_gem_object_put(fb->obj[0]);
417 kfree(fb);
418
419 return 0;
420}
421
422int psb_fbdev_init(struct drm_device *dev)
423{
424 struct drm_fb_helper *fb_helper;
425 struct drm_psb_private *dev_priv = dev->dev_private;
426 int ret;
427
428 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
429 if (!fb_helper) {
430 dev_err(dev->dev, "no memory\n");
431 return -ENOMEM;
432 }
433
434 dev_priv->fb_helper = fb_helper;
435
436 drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
437
438 ret = drm_fb_helper_init(dev, fb_helper);
439 if (ret)
440 goto free;
441
442 /* disable all the possible outputs/crtcs before entering KMS mode */
443 drm_helper_disable_unused_functions(dev);
444
445 ret = drm_fb_helper_initial_config(fb_helper, 32);
446 if (ret)
447 goto fini;
448
449 return 0;
450
451fini:
452 drm_fb_helper_fini(fb_helper);
453free:
454 kfree(fb_helper);
455 return ret;
456}
457
458static void psb_fbdev_fini(struct drm_device *dev)
459{
460 struct drm_psb_private *dev_priv = dev->dev_private;
461
462 if (!dev_priv->fb_helper)
463 return;
464
465 psb_fbdev_destroy(dev, dev_priv->fb_helper);
466 kfree(dev_priv->fb_helper);
467 dev_priv->fb_helper = NULL;
468}
469
470static const struct drm_mode_config_funcs psb_mode_funcs = {
471 .fb_create = psb_user_framebuffer_create,
472 .output_poll_changed = drm_fb_helper_output_poll_changed,
473};
474
475static void psb_setup_outputs(struct drm_device *dev)
476{
477 struct drm_psb_private *dev_priv = dev->dev_private;
478 struct drm_connector *connector;
479
480 drm_mode_create_scaling_mode_property(dev);
481
482 /* It is ok for this to fail - we just don't get backlight control */
483 if (!dev_priv->backlight_property)
484 dev_priv->backlight_property = drm_property_create_range(dev, 0,
485 "backlight", 0, 100);
486 dev_priv->ops->output_init(dev);
487
488 list_for_each_entry(connector, &dev->mode_config.connector_list,
489 head) {
490 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
491 struct drm_encoder *encoder = &gma_encoder->base;
492 int crtc_mask = 0, clone_mask = 0;
493
494 /* valid crtcs */
495 switch (gma_encoder->type) {
496 case INTEL_OUTPUT_ANALOG:
497 crtc_mask = (1 << 0);
498 clone_mask = (1 << INTEL_OUTPUT_ANALOG);
499 break;
500 case INTEL_OUTPUT_SDVO:
501 crtc_mask = dev_priv->ops->sdvo_mask;
502 clone_mask = 0;
503 break;
504 case INTEL_OUTPUT_LVDS:
505 crtc_mask = dev_priv->ops->lvds_mask;
506 clone_mask = 0;
507 break;
508 case INTEL_OUTPUT_MIPI:
509 crtc_mask = (1 << 0);
510 clone_mask = 0;
511 break;
512 case INTEL_OUTPUT_MIPI2:
513 crtc_mask = (1 << 2);
514 clone_mask = 0;
515 break;
516 case INTEL_OUTPUT_HDMI:
517 crtc_mask = dev_priv->ops->hdmi_mask;
518 clone_mask = (1 << INTEL_OUTPUT_HDMI);
519 break;
520 case INTEL_OUTPUT_DISPLAYPORT:
521 crtc_mask = (1 << 0) | (1 << 1);
522 clone_mask = 0;
523 break;
524 case INTEL_OUTPUT_EDP:
525 crtc_mask = (1 << 1);
526 clone_mask = 0;
527 }
528 encoder->possible_crtcs = crtc_mask;
529 encoder->possible_clones =
530 gma_connector_clones(dev, clone_mask);
531 }
532}
533
534void psb_modeset_init(struct drm_device *dev)
535{
536 struct drm_psb_private *dev_priv = dev->dev_private;
537 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
538 struct pci_dev *pdev = to_pci_dev(dev->dev);
539 int i;
540
541 drm_mode_config_init(dev);
542
543 dev->mode_config.min_width = 0;
544 dev->mode_config.min_height = 0;
545
546 dev->mode_config.funcs = &psb_mode_funcs;
547
548 /* set memory base */
549 /* Oaktrail and Poulsbo should use BAR 2*/
550 pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev->mode_config.fb_base));
551
552 /* num pipes is 2 for PSB but 1 for Mrst */
553 for (i = 0; i < dev_priv->num_pipe; i++)
554 psb_intel_crtc_init(dev, i, mode_dev);
555
556 dev->mode_config.max_width = 4096;
557 dev->mode_config.max_height = 4096;
558
559 psb_setup_outputs(dev);
560
561 if (dev_priv->ops->errata)
562 dev_priv->ops->errata(dev);
563
564 dev_priv->modeset = true;
565}
566
567void psb_modeset_cleanup(struct drm_device *dev)
568{
569 struct drm_psb_private *dev_priv = dev->dev_private;
570 if (dev_priv->modeset) {
571 drm_kms_helper_poll_fini(dev);
572 psb_fbdev_fini(dev);
573 drm_mode_config_cleanup(dev);
574 }
575}