summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/qxl/qxl_ttm.c
blob: 765a144cea14dc1afe76a42c90677ae954ca4950 (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
/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alon Levy
 */

#include <linux/delay.h>

#include <drm/drm.h>
#include <drm/drm_file.h>
#include <drm/drm_debugfs.h>
#include <drm/qxl_drm.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>

#include "qxl_drv.h"
#include "qxl_object.h"

static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
{
	struct qxl_mman *mman;
	struct qxl_device *qdev;

	mman = container_of(bdev, struct qxl_mman, bdev);
	qdev = container_of(mman, struct qxl_device, mman);
	return qdev;
}

static void qxl_evict_flags(struct ttm_buffer_object *bo,
				struct ttm_placement *placement)
{
	struct qxl_bo *qbo;
	static const struct ttm_place placements = {
		.fpfn = 0,
		.lpfn = 0,
		.mem_type = TTM_PL_SYSTEM,
		.flags = 0
	};

	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
		placement->placement = &placements;
		placement->num_placement = 1;
		return;
	}
	qbo = to_qxl_bo(bo);
	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
	*placement = qbo->placement;
}

int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
			   struct ttm_resource *mem)
{
	struct qxl_device *qdev = qxl_get_qdev(bdev);

	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
		/* system memory */
		return 0;
	case TTM_PL_VRAM:
		mem->bus.is_iomem = true;
		mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
		mem->bus.caching = ttm_write_combined;
		break;
	case TTM_PL_PRIV:
		mem->bus.is_iomem = true;
		mem->bus.offset = (mem->start << PAGE_SHIFT) +
			qdev->surfaceram_base;
		mem->bus.caching = ttm_write_combined;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/*
 * TTM backend functions.
 */
static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
{
	ttm_tt_fini(ttm);
	kfree(ttm);
}

static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
					uint32_t page_flags)
{
	struct ttm_tt *ttm;

	ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
	if (ttm == NULL)
		return NULL;
	if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
		kfree(ttm);
		return NULL;
	}
	return ttm;
}

static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
			       struct ttm_resource *new_mem)
{
	struct qxl_bo *qbo;
	struct qxl_device *qdev;

	if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
		return;
	qbo = to_qxl_bo(bo);
	qdev = to_qxl(qbo->tbo.base.dev);

	if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
		qxl_surface_evict(qdev, qbo, new_mem ? true : false);
}

static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
		       struct ttm_operation_ctx *ctx,
		       struct ttm_resource *new_mem,
		       struct ttm_place *hop)
{
	struct ttm_resource *old_mem = bo->resource;
	int ret;

	if (!old_mem) {
		if (new_mem->mem_type != TTM_PL_SYSTEM) {
			hop->mem_type = TTM_PL_SYSTEM;
			hop->flags = TTM_PL_FLAG_TEMPORARY;
			return -EMULTIHOP;
		}

		ttm_bo_move_null(bo, new_mem);
		return 0;
	}

	qxl_bo_move_notify(bo, new_mem);

	ret = ttm_bo_wait_ctx(bo, ctx);
	if (ret)
		return ret;

	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
		ttm_bo_move_null(bo, new_mem);
		return 0;
	}
	return ttm_bo_move_memcpy(bo, ctx, new_mem);
}

static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
{
	qxl_bo_move_notify(bo, NULL);
}

static struct ttm_device_funcs qxl_bo_driver = {
	.ttm_tt_create = &qxl_ttm_tt_create,
	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
	.eviction_valuable = ttm_bo_eviction_valuable,
	.evict_flags = &qxl_evict_flags,
	.move = &qxl_bo_move,
	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
	.delete_mem_notify = &qxl_bo_delete_mem_notify,
};

static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
				 unsigned int type,
				 uint64_t size)
{
	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
}

int qxl_ttm_init(struct qxl_device *qdev)
{
	int r;
	int num_io_pages; /* != rom->num_io_pages, we include surface0 */

	/* No others user of address space so set it to 0 */
	r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
			    qdev->ddev.anon_inode->i_mapping,
			    qdev->ddev.vma_offset_manager,
			    false, false);
	if (r) {
		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
		return r;
	}
	/* NOTE: this includes the framebuffer (aka surface 0) */
	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
	r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
	if (r) {
		DRM_ERROR("Failed initializing VRAM heap.\n");
		return r;
	}
	r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
				  qdev->surfaceram_size / PAGE_SIZE);
	if (r) {
		DRM_ERROR("Failed initializing Surfaces heap.\n");
		return r;
	}
	DRM_INFO("qxl: %uM of VRAM memory size\n",
		 (unsigned int)qdev->vram_size / (1024 * 1024));
	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
		 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
	DRM_INFO("qxl: %uM of Surface memory size\n",
		 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
	return 0;
}

void qxl_ttm_fini(struct qxl_device *qdev)
{
	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
	ttm_device_fini(&qdev->mman.bdev);
	DRM_INFO("qxl: ttm finalized\n");
}

void qxl_ttm_debugfs_init(struct qxl_device *qdev)
{
#if defined(CONFIG_DEBUG_FS)
	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
							     TTM_PL_VRAM),
					    qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
							     TTM_PL_PRIV),
					    qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
#endif
}