summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/loongson/lsdc_drv.c
blob: d8ff60b46abe6e6f46d2b04935c2fc11ced6beb0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2023 Loongson Technology Corporation Limited
 */

#include <linux/pci.h>
#include <linux/vgaarb.h>

#include <drm/drm_aperture.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_generic.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

#include "loongson_module.h"
#include "lsdc_drv.h"
#include "lsdc_gem.h"
#include "lsdc_ttm.h"

#define DRIVER_AUTHOR               "Sui Jingfeng <suijingfeng@loongson.cn>"
#define DRIVER_NAME                 "loongson"
#define DRIVER_DESC                 "drm driver for loongson graphics"
#define DRIVER_DATE                 "20220701"
#define DRIVER_MAJOR                1
#define DRIVER_MINOR                0
#define DRIVER_PATCHLEVEL           0

DEFINE_DRM_GEM_FOPS(lsdc_gem_fops);

static const struct drm_driver lsdc_drm_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_RENDER | DRIVER_GEM | DRIVER_ATOMIC,
	.fops = &lsdc_gem_fops,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,

	.debugfs_init = lsdc_debugfs_init,
	.dumb_create = lsdc_dumb_create,
	.dumb_map_offset = lsdc_dumb_map_offset,
	.gem_prime_import_sg_table = lsdc_prime_import_sg_table,
};

static const struct drm_mode_config_funcs lsdc_mode_config_funcs = {
	.fb_create = drm_gem_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

/* Display related */

static int lsdc_modeset_init(struct lsdc_device *ldev,
			     unsigned int num_crtc,
			     const struct lsdc_kms_funcs *funcs,
			     bool has_vblank)
{
	struct drm_device *ddev = &ldev->base;
	struct lsdc_display_pipe *dispipe;
	unsigned int i;
	int ret;

	for (i = 0; i < num_crtc; i++) {
		dispipe = &ldev->dispipe[i];

		/* We need an index before crtc is initialized */
		dispipe->index = i;

		ret = funcs->create_i2c(ddev, dispipe, i);
		if (ret)
			return ret;
	}

	for (i = 0; i < num_crtc; i++) {
		struct i2c_adapter *ddc = NULL;

		dispipe = &ldev->dispipe[i];
		if (dispipe->li2c)
			ddc = &dispipe->li2c->adapter;

		ret = funcs->output_init(ddev, dispipe, ddc, i);
		if (ret)
			return ret;

		ldev->num_output++;
	}

	for (i = 0; i < num_crtc; i++) {
		dispipe = &ldev->dispipe[i];

		ret = funcs->primary_plane_init(ddev, &dispipe->primary.base, i);
		if (ret)
			return ret;

		ret = funcs->cursor_plane_init(ddev, &dispipe->cursor.base, i);
		if (ret)
			return ret;

		ret = funcs->crtc_init(ddev, &dispipe->crtc.base,
				       &dispipe->primary.base,
				       &dispipe->cursor.base,
				       i, has_vblank);
		if (ret)
			return ret;
	}

	drm_info(ddev, "Total %u outputs\n", ldev->num_output);

	return 0;
}

static const struct drm_mode_config_helper_funcs lsdc_mode_config_helper_funcs = {
	.atomic_commit_tail = drm_atomic_helper_commit_tail,
};

static int lsdc_mode_config_init(struct drm_device *ddev,
				 const struct lsdc_desc *descp)
{
	int ret;

	ret = drmm_mode_config_init(ddev);
	if (ret)
		return ret;

	ddev->mode_config.funcs = &lsdc_mode_config_funcs;
	ddev->mode_config.min_width = 1;
	ddev->mode_config.min_height = 1;
	ddev->mode_config.max_width = descp->max_width * LSDC_NUM_CRTC;
	ddev->mode_config.max_height = descp->max_height * LSDC_NUM_CRTC;
	ddev->mode_config.preferred_depth = 24;
	ddev->mode_config.prefer_shadow = 1;

	ddev->mode_config.cursor_width = descp->hw_cursor_h;
	ddev->mode_config.cursor_height = descp->hw_cursor_h;

	ddev->mode_config.helper_private = &lsdc_mode_config_helper_funcs;

	if (descp->has_vblank_counter)
		ddev->max_vblank_count = 0xffffffff;

	return ret;
}

/*
 * The GPU and display controller in the LS7A1000/LS7A2000/LS2K2000 are
 * separated PCIE devices. They are two devices, not one. Bar 2 of the GPU
 * device contains the base address and size of the VRAM, both the GPU and
 * the DC could access the on-board VRAM.
 */
static int lsdc_get_dedicated_vram(struct lsdc_device *ldev,
				   struct pci_dev *pdev_dc,
				   const struct lsdc_desc *descp)
{
	struct drm_device *ddev = &ldev->base;
	struct pci_dev *pdev_gpu;
	resource_size_t base, size;

	/*
	 * The GPU has 00:06.0 as its BDF, while the DC has 00:06.1
	 * This is true for the LS7A1000, LS7A2000 and LS2K2000.
	 */
	pdev_gpu = pci_get_domain_bus_and_slot(pci_domain_nr(pdev_dc->bus),
					       pdev_dc->bus->number,
					       PCI_DEVFN(6, 0));
	if (!pdev_gpu) {
		drm_err(ddev, "No GPU device, then no VRAM\n");
		return -ENODEV;
	}

	base = pci_resource_start(pdev_gpu, 2);
	size = pci_resource_len(pdev_gpu, 2);

	ldev->vram_base = base;
	ldev->vram_size = size;
	ldev->gpu = pdev_gpu;

	drm_info(ddev, "Dedicated vram start: 0x%llx, size: %uMiB\n",
		 (u64)base, (u32)(size >> 20));

	return (size > SZ_1M) ? 0 : -ENODEV;
}

static struct lsdc_device *
lsdc_create_device(struct pci_dev *pdev,
		   const struct lsdc_desc *descp,
		   const struct drm_driver *driver)
{
	struct lsdc_device *ldev;
	struct drm_device *ddev;
	int ret;

	ldev = devm_drm_dev_alloc(&pdev->dev, driver, struct lsdc_device, base);
	if (IS_ERR(ldev))
		return ldev;

	ldev->dc = pdev;
	ldev->descp = descp;

	ddev = &ldev->base;

	loongson_gfxpll_create(ddev, &ldev->gfxpll);

	ret = lsdc_get_dedicated_vram(ldev, pdev, descp);
	if (ret) {
		drm_err(ddev, "Init VRAM failed: %d\n", ret);
		return ERR_PTR(ret);
	}

	ret = drm_aperture_remove_conflicting_framebuffers(ldev->vram_base,
							   ldev->vram_size,
							   driver);
	if (ret) {
		drm_err(ddev, "Remove firmware framebuffers failed: %d\n", ret);
		return ERR_PTR(ret);
	}

	ret = lsdc_ttm_init(ldev);
	if (ret) {
		drm_err(ddev, "Memory manager init failed: %d\n", ret);
		return ERR_PTR(ret);
	}

	lsdc_gem_init(ddev);

	/* Bar 0 of the DC device contains the MMIO register's base address */
	ldev->reg_base = pcim_iomap(pdev, 0, 0);
	if (!ldev->reg_base)
		return ERR_PTR(-ENODEV);

	spin_lock_init(&ldev->reglock);

	ret = lsdc_mode_config_init(ddev, descp);
	if (ret)
		return ERR_PTR(ret);

	ret = lsdc_modeset_init(ldev, descp->num_of_crtc, descp->funcs,
				loongson_vblank);
	if (ret)
		return ERR_PTR(ret);

	drm_mode_config_reset(ddev);

	return ldev;
}

/* For multiple GPU driver instance co-exixt in the system */

static unsigned int lsdc_vga_set_decode(struct pci_dev *pdev, bool state)
{
	return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
}

static int lsdc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	const struct lsdc_desc *descp;
	struct drm_device *ddev;
	struct lsdc_device *ldev;
	int ret;

	descp = lsdc_device_probe(pdev, ent->driver_data);
	if (IS_ERR_OR_NULL(descp))
		return -ENODEV;

	pci_set_master(pdev);

	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
	if (ret)
		return ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	dev_info(&pdev->dev, "Found %s, revision: %u",
		 to_loongson_gfx(descp)->model, pdev->revision);

	ldev = lsdc_create_device(pdev, descp, &lsdc_drm_driver);
	if (IS_ERR(ldev))
		return PTR_ERR(ldev);

	ddev = &ldev->base;

	pci_set_drvdata(pdev, ddev);

	vga_client_register(pdev, lsdc_vga_set_decode);

	drm_kms_helper_poll_init(ddev);

	if (loongson_vblank) {
		ret = drm_vblank_init(ddev, descp->num_of_crtc);
		if (ret)
			return ret;

		ret = devm_request_irq(&pdev->dev, pdev->irq,
				       descp->funcs->irq_handler,
				       IRQF_SHARED,
				       dev_name(&pdev->dev), ddev);
		if (ret) {
			drm_err(ddev, "Failed to register interrupt: %d\n", ret);
			return ret;
		}

		drm_info(ddev, "registered irq: %u\n", pdev->irq);
	}

	ret = drm_dev_register(ddev, 0);
	if (ret)
		return ret;

	drm_fbdev_generic_setup(ddev, 32);

	return 0;
}

static void lsdc_pci_remove(struct pci_dev *pdev)
{
	struct drm_device *ddev = pci_get_drvdata(pdev);

	drm_dev_unregister(ddev);
	drm_atomic_helper_shutdown(ddev);
}

static void lsdc_pci_shutdown(struct pci_dev *pdev)
{
	drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
}

static int lsdc_drm_freeze(struct drm_device *ddev)
{
	struct lsdc_device *ldev = to_lsdc(ddev);
	struct lsdc_bo *lbo;
	int ret;

	/* unpin all of buffers in the VRAM */
	mutex_lock(&ldev->gem.mutex);
	list_for_each_entry(lbo, &ldev->gem.objects, list) {
		struct ttm_buffer_object *tbo = &lbo->tbo;
		struct ttm_resource *resource = tbo->resource;
		unsigned int pin_count = tbo->pin_count;

		drm_dbg(ddev, "bo[%p], size: %zuKiB, type: %s, pin count: %u\n",
			lbo, lsdc_bo_size(lbo) >> 10,
			lsdc_mem_type_to_str(resource->mem_type), pin_count);

		if (!pin_count)
			continue;

		if (resource->mem_type == TTM_PL_VRAM) {
			ret = lsdc_bo_reserve(lbo);
			if (unlikely(ret)) {
				drm_err(ddev, "bo reserve failed: %d\n", ret);
				continue;
			}

			do {
				lsdc_bo_unpin(lbo);
				--pin_count;
			} while (pin_count);

			lsdc_bo_unreserve(lbo);
		}
	}
	mutex_unlock(&ldev->gem.mutex);

	lsdc_bo_evict_vram(ddev);

	ret = drm_mode_config_helper_suspend(ddev);
	if (unlikely(ret)) {
		drm_err(ddev, "Freeze error: %d", ret);
		return ret;
	}

	return 0;
}

static int lsdc_drm_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct drm_device *ddev = pci_get_drvdata(pdev);

	return drm_mode_config_helper_resume(ddev);
}

static int lsdc_pm_freeze(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct drm_device *ddev = pci_get_drvdata(pdev);

	return lsdc_drm_freeze(ddev);
}

static int lsdc_pm_thaw(struct device *dev)
{
	return lsdc_drm_resume(dev);
}

static int lsdc_pm_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int error;

	error = lsdc_pm_freeze(dev);
	if (error)
		return error;

	pci_save_state(pdev);
	/* Shut down the device */
	pci_disable_device(pdev);
	pci_set_power_state(pdev, PCI_D3hot);

	return 0;
}

static int lsdc_pm_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	pci_set_power_state(pdev, PCI_D0);

	pci_restore_state(pdev);

	if (pcim_enable_device(pdev))
		return -EIO;

	return lsdc_pm_thaw(dev);
}

static const struct dev_pm_ops lsdc_pm_ops = {
	.suspend = lsdc_pm_suspend,
	.resume = lsdc_pm_resume,
	.freeze = lsdc_pm_freeze,
	.thaw = lsdc_pm_thaw,
	.poweroff = lsdc_pm_freeze,
	.restore = lsdc_pm_resume,
};

static const struct pci_device_id lsdc_pciid_list[] = {
	{PCI_VDEVICE(LOONGSON, 0x7a06), CHIP_LS7A1000},
	{PCI_VDEVICE(LOONGSON, 0x7a36), CHIP_LS7A2000},
	{ }
};

struct pci_driver lsdc_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = lsdc_pciid_list,
	.probe = lsdc_pci_probe,
	.remove = lsdc_pci_remove,
	.shutdown = lsdc_pci_shutdown,
	.driver.pm = &lsdc_pm_ops,
};

MODULE_DEVICE_TABLE(pci, lsdc_pciid_list);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");