qxl_kms.c

  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 <linux/io-mapping.h>
 27#include <linux/pci.h>
 28
 29#include <drm/drm_drv.h>
 30#include <drm/drm_managed.h>
 31#include <drm/drm_print.h>
 32#include <drm/drm_probe_helper.h>
 33
 34#include "qxl_drv.h"
 35#include "qxl_object.h"
 36
 37static bool qxl_check_device(struct qxl_device *qdev)
 38{
 39	struct qxl_rom *rom = qdev->rom;
 40
 41	if (rom->magic != 0x4f525851) {
 42		DRM_ERROR("bad rom signature %x\n", rom->magic);
 43		return false;
 44	}
 45
 46	DRM_INFO("Device Version %d.%d\n", rom->id, rom->update_id);
 47	DRM_INFO("Compression level %d log level %d\n", rom->compression_level,
 48		 rom->log_level);
 49	DRM_INFO("%d io pages at offset 0x%x\n",
 50		 rom->num_io_pages, rom->pages_offset);
 51	DRM_INFO("%d byte draw area at offset 0x%x\n",
 52		 rom->surface0_area_size, rom->draw_area_offset);
 53
 54	qdev->vram_size = rom->surface0_area_size;
 55	DRM_INFO("RAM header offset: 0x%x\n", rom->ram_header_offset);
 56	return true;
 57}
 58
 59static void setup_hw_slot(struct qxl_device *qdev, struct qxl_memslot *slot)
 60{
 61	qdev->ram_header->mem_slot.mem_start = slot->start_phys_addr;
 62	qdev->ram_header->mem_slot.mem_end = slot->start_phys_addr + slot->size;
 63	qxl_io_memslot_add(qdev, qdev->rom->slots_start + slot->index);
 64}
 65
 66static void setup_slot(struct qxl_device *qdev,
 67		       struct qxl_memslot *slot,
 68		       unsigned int slot_index,
 69		       const char *slot_name,
 70		       unsigned long start_phys_addr,
 71		       unsigned long size)
 72{
 73	uint64_t high_bits;
 74
 75	slot->index = slot_index;
 76	slot->name = slot_name;
 77	slot->start_phys_addr = start_phys_addr;
 78	slot->size = size;
 79
 80	setup_hw_slot(qdev, slot);
 81
 82	slot->generation = qdev->rom->slot_generation;
 83	high_bits = (qdev->rom->slots_start + slot->index)
 84		<< qdev->rom->slot_gen_bits;
 85	high_bits |= slot->generation;
 86	high_bits <<= (64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits));
 87	slot->high_bits = high_bits;
 88
 89	DRM_INFO("slot %d (%s): base 0x%08lx, size 0x%08lx\n",
 90		 slot->index, slot->name,
 91		 (unsigned long)slot->start_phys_addr,
 92		 (unsigned long)slot->size);
 93}
 94
 95void qxl_reinit_memslots(struct qxl_device *qdev)
 96{
 97	setup_hw_slot(qdev, &qdev->main_slot);
 98	setup_hw_slot(qdev, &qdev->surfaces_slot);
 99}
100
101static void qxl_gc_work(struct work_struct *work)
102{
103	struct qxl_device *qdev = container_of(work, struct qxl_device, gc_work);
104
105	qxl_garbage_collect(qdev);
106}
107
108int qxl_device_init(struct qxl_device *qdev,
109		    struct pci_dev *pdev)
110{
111	int r, sb;
112
113	pci_set_drvdata(pdev, &qdev->ddev);
114
115	mutex_init(&qdev->gem.mutex);
116	mutex_init(&qdev->update_area_mutex);
117	mutex_init(&qdev->release_mutex);
118	mutex_init(&qdev->surf_evict_mutex);
119	qxl_gem_init(qdev);
120
121	qdev->rom_base = pci_resource_start(pdev, 2);
122	qdev->rom_size = pci_resource_len(pdev, 2);
123	qdev->vram_base = pci_resource_start(pdev, 0);
124	qdev->io_base = pci_resource_start(pdev, 3);
125
126	qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
127	if (!qdev->vram_mapping) {
128		pr_err("Unable to create vram_mapping");
129		return -ENOMEM;
130	}
131
132	if (pci_resource_len(pdev, 4) > 0) {
133		/* 64bit surface bar present */
134		sb = 4;
135		qdev->surfaceram_base = pci_resource_start(pdev, sb);
136		qdev->surfaceram_size = pci_resource_len(pdev, sb);
137		qdev->surface_mapping =
138			io_mapping_create_wc(qdev->surfaceram_base,
139					     qdev->surfaceram_size);
140	}
141	if (qdev->surface_mapping == NULL) {
142		/* 64bit surface bar not present (or mapping failed) */
143		sb = 1;
144		qdev->surfaceram_base = pci_resource_start(pdev, sb);
145		qdev->surfaceram_size = pci_resource_len(pdev, sb);
146		qdev->surface_mapping =
147			io_mapping_create_wc(qdev->surfaceram_base,
148					     qdev->surfaceram_size);
149		if (!qdev->surface_mapping) {
150			pr_err("Unable to create surface_mapping");
151			r = -ENOMEM;
152			goto vram_mapping_free;
153		}
154	}
155
156	DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
157		 (unsigned long long)qdev->vram_base,
158		 (unsigned long long)pci_resource_end(pdev, 0),
159		 (int)pci_resource_len(pdev, 0) / 1024 / 1024,
160		 (int)pci_resource_len(pdev, 0) / 1024,
161		 (unsigned long long)qdev->surfaceram_base,
162		 (unsigned long long)pci_resource_end(pdev, sb),
163		 (int)qdev->surfaceram_size / 1024 / 1024,
164		 (int)qdev->surfaceram_size / 1024,
165		 (sb == 4) ? "64bit" : "32bit");
166
167	qdev->rom = ioremap_wc(qdev->rom_base, qdev->rom_size);
168	if (!qdev->rom) {
169		pr_err("Unable to ioremap ROM\n");
170		r = -ENOMEM;
171		goto surface_mapping_free;
172	}
173
174	if (!qxl_check_device(qdev)) {
175		r = -ENODEV;
176		goto rom_unmap;
177	}
178
179	r = qxl_bo_init(qdev);
180	if (r) {
181		DRM_ERROR("bo init failed %d\n", r);
182		goto rom_unmap;
183	}
184
185	qdev->ram_header = ioremap_wc(qdev->vram_base +
186				   qdev->rom->ram_header_offset,
187				   sizeof(*qdev->ram_header));
188	if (!qdev->ram_header) {
189		DRM_ERROR("Unable to ioremap RAM header\n");
190		r = -ENOMEM;
191		goto bo_fini;
192	}
193
194	qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
195					     sizeof(struct qxl_command),
196					     QXL_COMMAND_RING_SIZE,
197					     qdev->io_base + QXL_IO_NOTIFY_CMD,
198					     &qdev->display_event);
199	if (!qdev->command_ring) {
200		DRM_ERROR("Unable to create command ring\n");
201		r = -ENOMEM;
202		goto ram_header_unmap;
203	}
204
205	qdev->cursor_ring = qxl_ring_create(
206				&(qdev->ram_header->cursor_ring_hdr),
207				sizeof(struct qxl_command),
208				QXL_CURSOR_RING_SIZE,
209				qdev->io_base + QXL_IO_NOTIFY_CURSOR,
210				&qdev->cursor_event);
211
212	if (!qdev->cursor_ring) {
213		DRM_ERROR("Unable to create cursor ring\n");
214		r = -ENOMEM;
215		goto command_ring_free;
216	}
217
218	qdev->release_ring = qxl_ring_create(
219				&(qdev->ram_header->release_ring_hdr),
220				sizeof(uint64_t),
221				QXL_RELEASE_RING_SIZE, 0,
222				NULL);
223
224	if (!qdev->release_ring) {
225		DRM_ERROR("Unable to create release ring\n");
226		r = -ENOMEM;
227		goto cursor_ring_free;
228	}
229
230	idr_init_base(&qdev->release_idr, 1);
231	spin_lock_init(&qdev->release_idr_lock);
232	spin_lock_init(&qdev->release_lock);
233
234	idr_init_base(&qdev->surf_id_idr, 1);
235	spin_lock_init(&qdev->surf_id_idr_lock);
236
237	mutex_init(&qdev->async_io_mutex);
238
239	/* reset the device into a known state - no memslots, no primary
240	 * created, no surfaces. */
241	qxl_io_reset(qdev);
242
243	/* must initialize irq before first async io - slot creation */
244	r = qxl_irq_init(qdev);
245	if (r) {
246		DRM_ERROR("Unable to init qxl irq\n");
247		goto release_ring_free;
248	}
249
250	/*
251	 * Note that virtual is surface0. We rely on the single ioremap done
252	 * before.
253	 */
254	setup_slot(qdev, &qdev->main_slot, 0, "main",
255		   (unsigned long)qdev->vram_base,
256		   (unsigned long)qdev->rom->ram_header_offset);
257	setup_slot(qdev, &qdev->surfaces_slot, 1, "surfaces",
258		   (unsigned long)qdev->surfaceram_base,
259		   (unsigned long)qdev->surfaceram_size);
260
261	INIT_WORK(&qdev->gc_work, qxl_gc_work);
262
263	return 0;
264
265release_ring_free:
266	qxl_ring_free(qdev->release_ring);
267cursor_ring_free:
268	qxl_ring_free(qdev->cursor_ring);
269command_ring_free:
270	qxl_ring_free(qdev->command_ring);
271ram_header_unmap:
272	iounmap(qdev->ram_header);
273bo_fini:
274	qxl_bo_fini(qdev);
275rom_unmap:
276	iounmap(qdev->rom);
277surface_mapping_free:
278	io_mapping_free(qdev->surface_mapping);
279vram_mapping_free:
280	io_mapping_free(qdev->vram_mapping);
281	return r;
282}
283
284void qxl_device_fini(struct qxl_device *qdev)
285{
286	int cur_idx;
287
288	/* check if qxl_device_init() was successful (gc_work is initialized last) */
289	if (!qdev->gc_work.func)
290		return;
291
292	for (cur_idx = 0; cur_idx < 3; cur_idx++) {
293		if (!qdev->current_release_bo[cur_idx])
294			continue;
295		qxl_bo_unpin(qdev->current_release_bo[cur_idx]);
296		qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
297		qdev->current_release_bo_offset[cur_idx] = 0;
298		qdev->current_release_bo[cur_idx] = NULL;
299	}
300
301	/*
302	 * Ask host to release resources (+fill release ring),
303	 * then wait for the release actually happening.
304	 */
305	qxl_io_notify_oom(qdev);
306	wait_event_timeout(qdev->release_event,
307			   atomic_read(&qdev->release_count) == 0,
308			   HZ);
309	flush_work(&qdev->gc_work);
310	qxl_surf_evict(qdev);
311	qxl_vram_evict(qdev);
312
313	qxl_gem_fini(qdev);
314	qxl_bo_fini(qdev);
315	qxl_ring_free(qdev->command_ring);
316	qxl_ring_free(qdev->cursor_ring);
317	qxl_ring_free(qdev->release_ring);
318	io_mapping_free(qdev->surface_mapping);
319	io_mapping_free(qdev->vram_mapping);
320	iounmap(qdev->ram_header);
321	iounmap(qdev->rom);
322	qdev->rom = NULL;
323}