blob: 75e2b7053f353b818f770c1a728413e02fe2f576 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jan Engelhardt96de0e22007-10-19 23:21:04 +02002 * Copyright 2003 José Fonseca.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Copyright 2003 Leif Delgass.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
Dave Airlie195b3a22006-04-05 18:12:18 +100025#include <linux/dma-mapping.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040026#include <linux/export.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020027#include <linux/pci.h>
28#include <linux/slab.h>
29
30#include <drm/drm.h>
31#include <drm/drm_agpsupport.h>
32#include <drm/drm_drv.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020033#include <drm/drm_print.h>
34
Ville Syrjälä43fc8842015-03-13 14:51:25 +020035#include "drm_internal.h"
Daniel Vetterba8286f2014-09-11 07:43:25 +020036#include "drm_legacy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Daniel Vetter33775332020-04-03 13:06:09 +020038#ifdef CONFIG_DRM_LEGACY
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020041 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
42 * @dev: DRM device
43 * @size: size of block to allocate
44 * @align: alignment of block
45 *
Daniel Vetter23ef59e2017-03-08 15:12:37 +010046 * FIXME: This is a needless abstraction of the Linux dma-api and should be
47 * removed.
48 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020049 * Return: A handle to the allocated memory block on success or NULL on
50 * failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 */
Zhenyu Wange6be8d92010-01-05 11:25:05 +080052drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
Dave Airlie9c8da5e2005-07-10 15:38:56 +100054 drm_dma_handle_t *dmah;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56 /* pci_alloc_consistent only guarantees alignment to the smallest
57 * PAGE_SIZE order which is greater than or equal to the requested size.
58 * Return NULL here for now to make sure nobody tries for larger alignment
59 */
60 if (align > size)
61 return NULL;
62
Dave Airlie9c8da5e2005-07-10 15:38:56 +100063 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
64 if (!dmah)
65 return NULL;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100066
Dave Airlie9c8da5e2005-07-10 15:38:56 +100067 dmah->size = size;
Luis Chamberlain750afb02019-01-04 09:23:09 +010068 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
69 &dmah->busaddr,
Chris Wilsonea36ec82020-02-02 17:16:31 +000070 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Dave Airlie9c8da5e2005-07-10 15:38:56 +100072 if (dmah->vaddr == NULL) {
73 kfree(dmah);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 return NULL;
Dave Airlie9c8da5e2005-07-10 15:38:56 +100075 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Dave Airlie9c8da5e2005-07-10 15:38:56 +100077 return dmah;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078}
79EXPORT_SYMBOL(drm_pci_alloc);
80
Dave Airlie9c8da5e2005-07-10 15:38:56 +100081/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020082 * drm_pci_free - Free a PCI consistent memory block
83 * @dev: DRM device
84 * @dmah: handle to memory block
Daniel Vetter23ef59e2017-03-08 15:12:37 +010085 *
86 * FIXME: This is a needless abstraction of the Linux dma-api and should be
87 * removed.
Dave Airlie9c8da5e2005-07-10 15:38:56 +100088 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100089void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
Dave Airlie9c8da5e2005-07-10 15:38:56 +100090{
Chris Wilson8e4ff9b2020-02-02 17:16:32 +000091 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
92 dmah->busaddr);
Dave Airlie9c8da5e2005-07-10 15:38:56 +100093 kfree(dmah);
94}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100095
Linus Torvalds1da177e2005-04-16 15:20:36 -070096EXPORT_SYMBOL(drm_pci_free);
Daniel Vetter33775332020-04-03 13:06:09 +020097#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Dave Airlie8410ea32010-12-15 03:16:38 +100099static int drm_get_pci_domain(struct drm_device *dev)
100{
101#ifndef __alpha__
102 /* For historical reasons, drm_get_pci_domain() is busticated
103 * on most archs and has to remain so for userspace interface
104 * < 1.4, except on alpha which was right from the beginning
105 */
106 if (dev->if_version < 0x10004)
107 return 0;
108#endif /* __alpha__ */
109
110 return pci_domain_nr(dev->pdev->bus);
111}
112
David Herrmann915b4d12014-08-29 12:12:43 +0200113int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
Dave Airlie8410ea32010-12-15 03:16:38 +1000114{
David Herrmannd0a39162014-08-29 12:12:41 +0200115 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
116 drm_get_pci_domain(dev),
117 dev->pdev->bus->number,
118 PCI_SLOT(dev->pdev->devfn),
119 PCI_FUNC(dev->pdev->devfn));
120 if (!master->unique)
Dave Airlie8410ea32010-12-15 03:16:38 +1000121 return -ENOMEM;
122
David Herrmannd0a39162014-08-29 12:12:41 +0200123 master->unique_len = strlen(master->unique);
Dave Airlie8410ea32010-12-15 03:16:38 +1000124 return 0;
Dave Airlie8410ea32010-12-15 03:16:38 +1000125}
126
Wolfram Sang45e97ab2011-06-15 11:26:47 +0200127static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
Dave Airlie8410ea32010-12-15 03:16:38 +1000128{
129 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
130 (p->busnum & 0xff) != dev->pdev->bus->number ||
131 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
132 return -EINVAL;
133
134 p->irq = dev->pdev->irq;
135
136 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
137 p->irq);
138 return 0;
139}
140
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200141/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200142 * drm_irq_by_busid - Get interrupt from bus ID
143 * @dev: DRM device
144 * @data: IOCTL parameter pointing to a drm_irq_busid structure
145 * @file_priv: DRM file private.
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200146 *
147 * Finds the PCI device with the specified bus id and gets its IRQ number.
148 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
149 * to that of the device that this DRM instance attached to.
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200150 *
151 * Return: 0 on success or a negative error code on failure.
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200152 */
153int drm_irq_by_busid(struct drm_device *dev, void *data,
154 struct drm_file *file_priv)
155{
156 struct drm_irq_busid *p = data;
157
Daniel Vetterfa538642016-08-03 21:11:10 +0200158 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
Chris Wilson69fdf422018-09-13 20:20:50 +0100159 return -EOPNOTSUPP;
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200160
161 /* UMS was only ever support on PCI devices. */
162 if (WARN_ON(!dev->pdev))
163 return -EINVAL;
164
165 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
Chris Wilson69fdf422018-09-13 20:20:50 +0100166 return -EOPNOTSUPP;
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200167
168 return drm_pci_irq_by_busid(dev, p);
169}
170
Chris Wilsonee21ec72020-03-07 09:37:02 +0000171void drm_pci_agp_destroy(struct drm_device *dev)
172{
173 if (dev->agp) {
174 arch_phys_wc_del(dev->agp->agp_mtrr);
175 drm_legacy_agp_clear(dev);
176 kfree(dev->agp);
177 dev->agp = NULL;
178 }
179}
180
181#ifdef CONFIG_DRM_LEGACY
182
Daniel Vetter8da79cc2013-12-11 11:34:34 +0100183static void drm_pci_agp_init(struct drm_device *dev)
Dave Airlie8410ea32010-12-15 03:16:38 +1000184{
Daniel Vetterd9906752013-12-11 11:34:35 +0100185 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
Daniel Vetter2ce02642017-01-25 07:26:52 +0100186 if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
Dave Airlie8410ea32010-12-15 03:16:38 +1000187 dev->agp = drm_agp_init(dev);
Daniel Vetter28185642013-08-08 15:41:27 +0200188 if (dev->agp) {
189 dev->agp->agp_mtrr = arch_phys_wc_add(
190 dev->agp->agp_info.aper_base,
191 dev->agp->agp_info.aper_size *
192 1024 * 1024);
Dave Airlie8410ea32010-12-15 03:16:38 +1000193 }
194 }
Dave Airlie8410ea32010-12-15 03:16:38 +1000195}
196
Daniel Vetterc393fba2020-02-25 17:58:35 +0100197static int drm_get_pci_dev(struct pci_dev *pdev,
198 const struct pci_device_id *ent,
199 struct drm_driver *driver)
Jordan Crousedcdb1672010-05-27 13:40:25 -0600200{
201 struct drm_device *dev;
202 int ret;
203
204 DRM_DEBUG("\n");
205
David Herrmann1bb72532013-10-02 11:23:34 +0200206 dev = drm_dev_alloc(driver, &pdev->dev);
Tom Gundersen0f2886052016-09-21 16:59:19 +0200207 if (IS_ERR(dev))
208 return PTR_ERR(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600209
210 ret = pci_enable_device(pdev);
211 if (ret)
David Herrmannc22f0ac2013-10-02 11:23:35 +0200212 goto err_free;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600213
Jordan Crousedcdb1672010-05-27 13:40:25 -0600214 dev->pdev = pdev;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600215#ifdef __alpha__
216 dev->hose = pdev->sysdata;
217#endif
218
David Herrmannc22f0ac2013-10-02 11:23:35 +0200219 if (drm_core_check_feature(dev, DRIVER_MODESET))
Jordan Crousedcdb1672010-05-27 13:40:25 -0600220 pci_set_drvdata(pdev, dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600221
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100222 drm_pci_agp_init(dev);
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100223
David Herrmannc22f0ac2013-10-02 11:23:35 +0200224 ret = drm_dev_register(dev, ent->driver_data);
225 if (ret)
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100226 goto err_agp;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600227
Daniel Vetterb3f23332013-12-11 11:34:31 +0100228 /* No locking needed since shadow-attach is single-threaded since it may
229 * only be called from the per-driver module init hook. */
Daniel Vetterfa538642016-08-03 21:11:10 +0200230 if (drm_core_check_feature(dev, DRIVER_LEGACY))
Daniel Vetterb3f23332013-12-11 11:34:31 +0100231 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
232
Jordan Crousedcdb1672010-05-27 13:40:25 -0600233 return 0;
234
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100235err_agp:
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100236 drm_pci_agp_destroy(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600237 pci_disable_device(pdev);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200238err_free:
Aishwarya Pantffeeeed2017-09-26 22:34:00 +0530239 drm_dev_put(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600240 return ret;
241}
Thomas Zimmermann1be9d5f2019-12-03 11:03:56 +0100242
Jordan Crousedcdb1672010-05-27 13:40:25 -0600243/**
Daniel Vetter10631d72017-05-24 16:51:40 +0200244 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200245 * @driver: DRM device driver
246 * @pdriver: PCI device driver
Jordan Crousedcdb1672010-05-27 13:40:25 -0600247 *
Daniel Vetter10631d72017-05-24 16:51:40 +0200248 * This is only used by legacy dri1 drivers and deprecated.
Daniel Vetter6e3f7972015-09-28 21:46:35 +0200249 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200250 * Return: 0 on success or a negative error code on failure.
Jordan Crousedcdb1672010-05-27 13:40:25 -0600251 */
Daniel Vetter10631d72017-05-24 16:51:40 +0200252int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
Jordan Crousedcdb1672010-05-27 13:40:25 -0600253{
254 struct pci_dev *pdev = NULL;
255 const struct pci_device_id *pid;
256 int i;
257
Dave Airlie8410ea32010-12-15 03:16:38 +1000258 DRM_DEBUG("\n");
259
Daniel Vetter10631d72017-05-24 16:51:40 +0200260 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
261 return -EINVAL;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600262
263 /* If not using KMS, fall back to stealth mode manual scanning. */
Daniel Vetterb3f23332013-12-11 11:34:31 +0100264 INIT_LIST_HEAD(&driver->legacy_dev_list);
Dave Airlie8410ea32010-12-15 03:16:38 +1000265 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
266 pid = &pdriver->id_table[i];
Jordan Crousedcdb1672010-05-27 13:40:25 -0600267
268 /* Loop around setting up a DRM device for each PCI device
269 * matching our ID and device class. If we had the internal
270 * function that pci_get_subsys and pci_get_class used, we'd
271 * be able to just pass pid in instead of doing a two-stage
272 * thing.
273 */
274 pdev = NULL;
275 while ((pdev =
276 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
277 pid->subdevice, pdev)) != NULL) {
278 if ((pdev->class & pid->class_mask) != pid->class)
279 continue;
280
281 /* stealth mode requires a manual probe */
282 pci_dev_get(pdev);
283 drm_get_pci_dev(pdev, pid, driver);
284 }
285 }
286 return 0;
287}
Daniel Vetter10631d72017-05-24 16:51:40 +0200288EXPORT_SYMBOL(drm_legacy_pci_init);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600289
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200290/**
Daniel Vetter10631d72017-05-24 16:51:40 +0200291 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200292 * @driver: DRM device driver
293 * @pdriver: PCI device driver
294 *
Daniel Vetter10631d72017-05-24 16:51:40 +0200295 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
296 * is deprecated and only used by dri1 drivers.
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200297 */
Daniel Vetter10631d72017-05-24 16:51:40 +0200298void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700299{
300 struct drm_device *dev, *tmp;
301 DRM_DEBUG("\n");
302
Daniel Vetterfa538642016-08-03 21:11:10 +0200303 if (!(driver->driver_features & DRIVER_LEGACY)) {
Daniel Vetter10631d72017-05-24 16:51:40 +0200304 WARN_ON(1);
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700305 } else {
Daniel Vetterb3f23332013-12-11 11:34:31 +0100306 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
307 legacy_dev_list) {
Daniel Vetterb3f23332013-12-11 11:34:31 +0100308 list_del(&dev->legacy_dev_list);
Daniel Vetterc94adc42014-01-30 17:58:38 +0100309 drm_put_dev(dev);
Daniel Vetterb3f23332013-12-11 11:34:31 +0100310 }
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700311 }
312 DRM_INFO("Module unloaded\n");
313}
Daniel Vetter10631d72017-05-24 16:51:40 +0200314EXPORT_SYMBOL(drm_legacy_pci_exit);
Thomas Zimmermann1be9d5f2019-12-03 11:03:56 +0100315
316#endif