xref: /openbmc/linux/drivers/gpu/drm/qxl/qxl_kms.c (revision e23feb16)
1 /*
2  * Copyright 2013 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Dave Airlie
23  *          Alon Levy
24  */
25 
26 #include "qxl_drv.h"
27 #include "qxl_object.h"
28 
29 #include <drm/drm_crtc_helper.h>
30 #include <linux/io-mapping.h>
31 
32 int qxl_log_level;
33 
34 static void qxl_dump_mode(struct qxl_device *qdev, void *p)
35 {
36 	struct qxl_mode *m = p;
37 	DRM_DEBUG_KMS("%d: %dx%d %d bits, stride %d, %dmm x %dmm, orientation %d\n",
38 		      m->id, m->x_res, m->y_res, m->bits, m->stride, m->x_mili,
39 		      m->y_mili, m->orientation);
40 }
41 
42 static bool qxl_check_device(struct qxl_device *qdev)
43 {
44 	struct qxl_rom *rom = qdev->rom;
45 	int mode_offset;
46 	int i;
47 
48 	if (rom->magic != 0x4f525851) {
49 		DRM_ERROR("bad rom signature %x\n", rom->magic);
50 		return false;
51 	}
52 
53 	DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
54 	DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
55 		 rom->log_level);
56 	DRM_INFO("Currently using mode #%d, list at 0x%x\n",
57 		 rom->mode, rom->modes_offset);
58 	DRM_INFO("%d io pages at offset 0x%x\n",
59 		 rom->num_io_pages, rom->pages_offset);
60 	DRM_INFO("%d byte draw area at offset 0x%x\n",
61 		 rom->surface0_area_size, rom->draw_area_offset);
62 
63 	qdev->vram_size = rom->surface0_area_size;
64 	DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
65 
66 	mode_offset = rom->modes_offset / 4;
67 	qdev->mode_info.num_modes = ((u32 *)rom)[mode_offset];
68 	DRM_INFO("rom modes offset 0x%x for %d modes\n", rom->modes_offset,
69 		 qdev->mode_info.num_modes);
70 	qdev->mode_info.modes = (void *)((uint32_t *)rom + mode_offset + 1);
71 	for (i = 0; i < qdev->mode_info.num_modes; i++)
72 		qxl_dump_mode(qdev, qdev->mode_info.modes + i);
73 	return true;
74 }
75 
76 static void setup_hw_slot(struct qxl_device *qdev, int slot_index,
77 			  struct qxl_memslot *slot)
78 {
79 	qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
80 	qdev->ram_header->mem_slot.mem_end = slot->end_phys_addr;
81 	qxl_io_memslot_add(qdev, slot_index);
82 }
83 
84 static uint8_t setup_slot(struct qxl_device *qdev, uint8_t slot_index_offset,
85 	unsigned long start_phys_addr, unsigned long end_phys_addr)
86 {
87 	uint64_t high_bits;
88 	struct qxl_memslot *slot;
89 	uint8_t slot_index;
90 
91 	slot_index = qdev->rom->slots_start + slot_index_offset;
92 	slot = &qdev->mem_slots[slot_index];
93 	slot->start_phys_addr = start_phys_addr;
94 	slot->end_phys_addr = end_phys_addr;
95 
96 	setup_hw_slot(qdev, slot_index, slot);
97 
98 	slot->generation = qdev->rom->slot_generation;
99 	high_bits = slot_index << qdev->slot_gen_bits;
100 	high_bits |= slot->generation;
101 	high_bits <<= (64 - (qdev->slot_gen_bits + qdev->slot_id_bits));
102 	slot->high_bits = high_bits;
103 	return slot_index;
104 }
105 
106 void qxl_reinit_memslots(struct qxl_device *qdev)
107 {
108 	setup_hw_slot(qdev, qdev->main_mem_slot, &qdev->mem_slots[qdev->main_mem_slot]);
109 	setup_hw_slot(qdev, qdev->surfaces_mem_slot, &qdev->mem_slots[qdev->surfaces_mem_slot]);
110 }
111 
112 static void qxl_gc_work(struct work_struct *work)
113 {
114 	struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
115 	qxl_garbage_collect(qdev);
116 }
117 
118 int qxl_device_init(struct qxl_device *qdev,
119 		    struct drm_device *ddev,
120 		    struct pci_dev *pdev,
121 		    unsigned long flags)
122 {
123 	int r;
124 
125 	qdev->dev = &pdev->dev;
126 	qdev->ddev = ddev;
127 	qdev->pdev = pdev;
128 	qdev->flags = flags;
129 
130 	mutex_init(&qdev->gem.mutex);
131 	mutex_init(&qdev->update_area_mutex);
132 	mutex_init(&qdev->release_mutex);
133 	mutex_init(&qdev->surf_evict_mutex);
134 	INIT_LIST_HEAD(&qdev->gem.objects);
135 
136 	qdev->rom_base = pci_resource_start(pdev, 2);
137 	qdev->rom_size = pci_resource_len(pdev, 2);
138 	qdev->vram_base = pci_resource_start(pdev, 0);
139 	qdev->surfaceram_base = pci_resource_start(pdev, 1);
140 	qdev->surfaceram_size = pci_resource_len(pdev, 1);
141 	qdev->io_base = pci_resource_start(pdev, 3);
142 
143 	qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
144 	qdev->surface_mapping = io_mapping_create_wc(qdev->surfaceram_base, qdev->surfaceram_size);
145 	DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk)\n",
146 		 (unsigned long long)qdev->vram_base,
147 		 (unsigned long long)pci_resource_end(pdev, 0),
148 		 (int)pci_resource_len(pdev, 0) / 1024 / 1024,
149 		 (int)pci_resource_len(pdev, 0) / 1024,
150 		 (unsigned long long)qdev->surfaceram_base,
151 		 (unsigned long long)pci_resource_end(pdev, 1),
152 		 (int)qdev->surfaceram_size / 1024 / 1024,
153 		 (int)qdev->surfaceram_size / 1024);
154 
155 	qdev->rom = ioremap(qdev->rom_base, qdev->rom_size);
156 	if (!qdev->rom) {
157 		pr_err("Unable to ioremap ROM\n");
158 		return -ENOMEM;
159 	}
160 
161 	qxl_check_device(qdev);
162 
163 	r = qxl_bo_init(qdev);
164 	if (r) {
165 		DRM_ERROR("bo init failed %d\n", r);
166 		return r;
167 	}
168 
169 	qdev->ram_header = ioremap(qdev->vram_base +
170 				   qdev->rom->ram_header_offset,
171 				   sizeof(*qdev->ram_header));
172 
173 	qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
174 					     sizeof(struct qxl_command),
175 					     QXL_COMMAND_RING_SIZE,
176 					     qdev->io_base + QXL_IO_NOTIFY_CMD,
177 					     false,
178 					     &qdev->display_event);
179 
180 	qdev->cursor_ring = qxl_ring_create(
181 				&(qdev->ram_header->cursor_ring_hdr),
182 				sizeof(struct qxl_command),
183 				QXL_CURSOR_RING_SIZE,
184 				qdev->io_base + QXL_IO_NOTIFY_CMD,
185 				false,
186 				&qdev->cursor_event);
187 
188 	qdev->release_ring = qxl_ring_create(
189 				&(qdev->ram_header->release_ring_hdr),
190 				sizeof(uint64_t),
191 				QXL_RELEASE_RING_SIZE, 0, true,
192 				NULL);
193 
194 	/* TODO - slot initialization should happen on reset. where is our
195 	 * reset handler? */
196 	qdev->n_mem_slots = qdev->rom->slots_end;
197 	qdev->slot_gen_bits = qdev->rom->slot_gen_bits;
198 	qdev->slot_id_bits = qdev->rom->slot_id_bits;
199 	qdev->va_slot_mask =
200 		(~(uint64_t)0) >> (qdev->slot_id_bits + qdev->slot_gen_bits);
201 
202 	qdev->mem_slots =
203 		kmalloc(qdev->n_mem_slots * sizeof(struct qxl_memslot),
204 			GFP_KERNEL);
205 
206 	idr_init(&qdev->release_idr);
207 	spin_lock_init(&qdev->release_idr_lock);
208 
209 	idr_init(&qdev->surf_id_idr);
210 	spin_lock_init(&qdev->surf_id_idr_lock);
211 
212 	mutex_init(&qdev->async_io_mutex);
213 
214 	/* reset the device into a known state - no memslots, no primary
215 	 * created, no surfaces. */
216 	qxl_io_reset(qdev);
217 
218 	/* must initialize irq before first async io - slot creation */
219 	r = qxl_irq_init(qdev);
220 	if (r)
221 		return r;
222 
223 	/*
224 	 * Note that virtual is surface0. We rely on the single ioremap done
225 	 * before.
226 	 */
227 	qdev->main_mem_slot = setup_slot(qdev, 0,
228 		(unsigned long)qdev->vram_base,
229 		(unsigned long)qdev->vram_base + qdev->rom->ram_header_offset);
230 	qdev->surfaces_mem_slot = setup_slot(qdev, 1,
231 		(unsigned long)qdev->surfaceram_base,
232 		(unsigned long)qdev->surfaceram_base + qdev->surfaceram_size);
233 	DRM_INFO("main mem slot %d [%lx,%x)\n",
234 		qdev->main_mem_slot,
235 		(unsigned long)qdev->vram_base, qdev->rom->ram_header_offset);
236 
237 
238 	qdev->gc_queue = create_singlethread_workqueue("qxl_gc");
239 	INIT_WORK(&qdev->gc_work, qxl_gc_work);
240 
241 	r = qxl_fb_init(qdev);
242 	if (r)
243 		return r;
244 
245 	return 0;
246 }
247 
248 static void qxl_device_fini(struct qxl_device *qdev)
249 {
250 	if (qdev->current_release_bo[0])
251 		qxl_bo_unref(&qdev->current_release_bo[0]);
252 	if (qdev->current_release_bo[1])
253 		qxl_bo_unref(&qdev->current_release_bo[1]);
254 	flush_workqueue(qdev->gc_queue);
255 	destroy_workqueue(qdev->gc_queue);
256 	qdev->gc_queue = NULL;
257 
258 	qxl_ring_free(qdev->command_ring);
259 	qxl_ring_free(qdev->cursor_ring);
260 	qxl_ring_free(qdev->release_ring);
261 	qxl_bo_fini(qdev);
262 	io_mapping_free(qdev->surface_mapping);
263 	io_mapping_free(qdev->vram_mapping);
264 	iounmap(qdev->ram_header);
265 	iounmap(qdev->rom);
266 	qdev->rom = NULL;
267 	qdev->mode_info.modes = NULL;
268 	qdev->mode_info.num_modes = 0;
269 	qxl_debugfs_remove_files(qdev);
270 }
271 
272 int qxl_driver_unload(struct drm_device *dev)
273 {
274 	struct qxl_device *qdev = dev->dev_private;
275 
276 	if (qdev == NULL)
277 		return 0;
278 	qxl_modeset_fini(qdev);
279 	qxl_device_fini(qdev);
280 
281 	kfree(qdev);
282 	dev->dev_private = NULL;
283 	return 0;
284 }
285 
286 int qxl_driver_load(struct drm_device *dev, unsigned long flags)
287 {
288 	struct qxl_device *qdev;
289 	int r;
290 
291 	/* require kms */
292 	if (!drm_core_check_feature(dev, DRIVER_MODESET))
293 		return -ENODEV;
294 
295 	qdev = kzalloc(sizeof(struct qxl_device), GFP_KERNEL);
296 	if (qdev == NULL)
297 		return -ENOMEM;
298 
299 	dev->dev_private = qdev;
300 
301 	r = qxl_device_init(qdev, dev, dev->pdev, flags);
302 	if (r)
303 		goto out;
304 
305 	r = qxl_modeset_init(qdev);
306 	if (r) {
307 		qxl_driver_unload(dev);
308 		goto out;
309 	}
310 
311 	drm_kms_helper_poll_init(qdev->ddev);
312 
313 	return 0;
314 out:
315 	kfree(qdev);
316 	return r;
317 }
318 
319 
320