blob: a1fff1179a97ae5ec55e5f7489e367619de322f8 [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
25#include <linux/pci.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Dave Airlie195b3a22006-04-05 18:12:18 +100027#include <linux/dma-mapping.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040028#include <linux/export.h>
David Howells760285e2012-10-02 18:01:07 +010029#include <drm/drmP.h>
Ville Syrjälä43fc8842015-03-13 14:51:25 +020030#include "drm_internal.h"
Daniel Vetterba8286f2014-09-11 07:43:25 +020031#include "drm_legacy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020034 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
35 * @dev: DRM device
36 * @size: size of block to allocate
37 * @align: alignment of block
38 *
39 * Return: A handle to the allocated memory block on success or NULL on
40 * failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
Zhenyu Wange6be8d92010-01-05 11:25:05 +080042drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043{
Dave Airlie9c8da5e2005-07-10 15:38:56 +100044 drm_dma_handle_t *dmah;
Dave Airlieddf19b92006-03-19 18:56:12 +110045 unsigned long addr;
46 size_t sz;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48 /* pci_alloc_consistent only guarantees alignment to the smallest
49 * PAGE_SIZE order which is greater than or equal to the requested size.
50 * Return NULL here for now to make sure nobody tries for larger alignment
51 */
52 if (align > size)
53 return NULL;
54
Dave Airlie9c8da5e2005-07-10 15:38:56 +100055 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
56 if (!dmah)
57 return NULL;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100058
Dave Airlie9c8da5e2005-07-10 15:38:56 +100059 dmah->size = size;
Dave Airlieddf19b92006-03-19 18:56:12 +110060 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Dave Airlie9c8da5e2005-07-10 15:38:56 +100062 if (dmah->vaddr == NULL) {
63 kfree(dmah);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 return NULL;
Dave Airlie9c8da5e2005-07-10 15:38:56 +100065 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Dave Airlie9c8da5e2005-07-10 15:38:56 +100067 memset(dmah->vaddr, 0, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Dave Airlieddf19b92006-03-19 18:56:12 +110069 /* XXX - Is virt_to_page() legal for consistent mem? */
70 /* Reserve */
71 for (addr = (unsigned long)dmah->vaddr, sz = size;
72 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
Ben Hutchingse1e78532013-10-27 21:52:39 +000073 SetPageReserved(virt_to_page((void *)addr));
Dave Airlieddf19b92006-03-19 18:56:12 +110074 }
75
Dave Airlie9c8da5e2005-07-10 15:38:56 +100076 return dmah;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100078
Linus Torvalds1da177e2005-04-16 15:20:36 -070079EXPORT_SYMBOL(drm_pci_alloc);
80
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020081/*
82 * Free a PCI consistent memory block without freeing its descriptor.
Dave Airlie9c8da5e2005-07-10 15:38:56 +100083 *
84 * This function is for internal use in the Linux-specific DRM core code.
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 */
Daniel Vetter1c96e842014-09-10 12:43:51 +020086void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Dave Airlieddf19b92006-03-19 18:56:12 +110088 unsigned long addr;
89 size_t sz;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Eric Anholt9a298b22009-03-24 12:23:04 -070091 if (dmah->vaddr) {
Dave Airlieddf19b92006-03-19 18:56:12 +110092 /* XXX - Is virt_to_page() legal for consistent mem? */
93 /* Unreserve */
94 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
95 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
Ben Hutchingse1e78532013-10-27 21:52:39 +000096 ClearPageReserved(virt_to_page((void *)addr));
Dave Airlieddf19b92006-03-19 18:56:12 +110097 }
98 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
99 dmah->busaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101}
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000102
103/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200104 * drm_pci_free - Free a PCI consistent memory block
105 * @dev: DRM device
106 * @dmah: handle to memory block
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000107 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000108void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000109{
Daniel Vetter1c96e842014-09-10 12:43:51 +0200110 __drm_legacy_pci_free(dev, dmah);
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000111 kfree(dmah);
112}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114EXPORT_SYMBOL(drm_pci_free);
115
Jordan Crousedcdb1672010-05-27 13:40:25 -0600116#ifdef CONFIG_PCI
Dave Airlie8410ea32010-12-15 03:16:38 +1000117
118static int drm_get_pci_domain(struct drm_device *dev)
119{
120#ifndef __alpha__
121 /* For historical reasons, drm_get_pci_domain() is busticated
122 * on most archs and has to remain so for userspace interface
123 * < 1.4, except on alpha which was right from the beginning
124 */
125 if (dev->if_version < 0x10004)
126 return 0;
127#endif /* __alpha__ */
128
129 return pci_domain_nr(dev->pdev->bus);
130}
131
David Herrmann915b4d12014-08-29 12:12:43 +0200132int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
Dave Airlie8410ea32010-12-15 03:16:38 +1000133{
David Herrmannd0a39162014-08-29 12:12:41 +0200134 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
135 drm_get_pci_domain(dev),
136 dev->pdev->bus->number,
137 PCI_SLOT(dev->pdev->devfn),
138 PCI_FUNC(dev->pdev->devfn));
139 if (!master->unique)
Dave Airlie8410ea32010-12-15 03:16:38 +1000140 return -ENOMEM;
141
David Herrmannd0a39162014-08-29 12:12:41 +0200142 master->unique_len = strlen(master->unique);
Dave Airlie8410ea32010-12-15 03:16:38 +1000143 return 0;
Dave Airlie8410ea32010-12-15 03:16:38 +1000144}
David Herrmann915b4d12014-08-29 12:12:43 +0200145EXPORT_SYMBOL(drm_pci_set_busid);
Dave Airlie8410ea32010-12-15 03:16:38 +1000146
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100147int drm_pci_set_unique(struct drm_device *dev,
148 struct drm_master *master,
149 struct drm_unique *u)
Dave Airlie8410ea32010-12-15 03:16:38 +1000150{
151 int domain, bus, slot, func, ret;
Dave Airlie8410ea32010-12-15 03:16:38 +1000152
153 master->unique_len = u->unique_len;
David Herrmann1e444be2014-08-29 12:12:42 +0200154 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
Dave Airlie8410ea32010-12-15 03:16:38 +1000155 if (!master->unique) {
156 ret = -ENOMEM;
157 goto err;
158 }
159
160 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
161 ret = -EFAULT;
162 goto err;
163 }
164
165 master->unique[master->unique_len] = '\0';
166
Dave Airlie8410ea32010-12-15 03:16:38 +1000167 /* Return error if the busid submitted doesn't match the device's actual
168 * busid.
169 */
170 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
171 if (ret != 3) {
172 ret = -EINVAL;
173 goto err;
174 }
175
176 domain = bus >> 8;
177 bus &= 0xff;
178
179 if ((domain != drm_get_pci_domain(dev)) ||
180 (bus != dev->pdev->bus->number) ||
181 (slot != PCI_SLOT(dev->pdev->devfn)) ||
182 (func != PCI_FUNC(dev->pdev->devfn))) {
183 ret = -EINVAL;
184 goto err;
185 }
186 return 0;
187err:
188 return ret;
189}
190
Wolfram Sang45e97ab2011-06-15 11:26:47 +0200191static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
Dave Airlie8410ea32010-12-15 03:16:38 +1000192{
193 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
194 (p->busnum & 0xff) != dev->pdev->bus->number ||
195 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
196 return -EINVAL;
197
198 p->irq = dev->pdev->irq;
199
200 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
201 p->irq);
202 return 0;
203}
204
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200205/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200206 * drm_irq_by_busid - Get interrupt from bus ID
207 * @dev: DRM device
208 * @data: IOCTL parameter pointing to a drm_irq_busid structure
209 * @file_priv: DRM file private.
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200210 *
211 * Finds the PCI device with the specified bus id and gets its IRQ number.
212 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
213 * to that of the device that this DRM instance attached to.
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200214 *
215 * Return: 0 on success or a negative error code on failure.
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200216 */
217int drm_irq_by_busid(struct drm_device *dev, void *data,
218 struct drm_file *file_priv)
219{
220 struct drm_irq_busid *p = data;
221
222 if (drm_core_check_feature(dev, DRIVER_MODESET))
223 return -EINVAL;
224
225 /* UMS was only ever support on PCI devices. */
226 if (WARN_ON(!dev->pdev))
227 return -EINVAL;
228
229 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
230 return -EINVAL;
231
232 return drm_pci_irq_by_busid(dev, p);
233}
234
Daniel Vetter8da79cc2013-12-11 11:34:34 +0100235static void drm_pci_agp_init(struct drm_device *dev)
Dave Airlie8410ea32010-12-15 03:16:38 +1000236{
Daniel Vetterd9906752013-12-11 11:34:35 +0100237 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
Dave Airlie8410ea32010-12-15 03:16:38 +1000238 if (drm_pci_device_is_agp(dev))
239 dev->agp = drm_agp_init(dev);
Daniel Vetter28185642013-08-08 15:41:27 +0200240 if (dev->agp) {
241 dev->agp->agp_mtrr = arch_phys_wc_add(
242 dev->agp->agp_info.aper_base,
243 dev->agp->agp_info.aper_size *
244 1024 * 1024);
Dave Airlie8410ea32010-12-15 03:16:38 +1000245 }
246 }
Dave Airlie8410ea32010-12-15 03:16:38 +1000247}
248
Daniel Vetter4efafeb2013-12-11 11:34:38 +0100249void drm_pci_agp_destroy(struct drm_device *dev)
David Herrmann28ec7112013-07-27 16:37:00 +0200250{
Daniel Vetterd9906752013-12-11 11:34:35 +0100251 if (dev->agp) {
Daniel Vetter28185642013-08-08 15:41:27 +0200252 arch_phys_wc_del(dev->agp->agp_mtrr);
David Herrmann28ec7112013-07-27 16:37:00 +0200253 drm_agp_clear(dev);
Daniel Vetterd6e4b282013-12-11 11:34:37 +0100254 kfree(dev->agp);
David Herrmann28ec7112013-07-27 16:37:00 +0200255 dev->agp = NULL;
256 }
257}
258
Jordan Crousedcdb1672010-05-27 13:40:25 -0600259/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200260 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
261 * @pdev: PCI device
262 * @ent: entry from the PCI ID table that matches @pdev
263 * @driver: DRM device driver
Jordan Crousedcdb1672010-05-27 13:40:25 -0600264 *
265 * Attempt to gets inter module "drm" information. If we are first
266 * then register the character device and inter module information.
267 * Try and register, if we fail to register, backout previous work.
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200268 *
Daniel Vetter6e3f7972015-09-28 21:46:35 +0200269 * NOTE: This function is deprecated, please use drm_dev_alloc() and
270 * drm_dev_register() instead and remove your ->load() callback.
271 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200272 * Return: 0 on success or a negative error code on failure.
Jordan Crousedcdb1672010-05-27 13:40:25 -0600273 */
274int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
275 struct drm_driver *driver)
276{
277 struct drm_device *dev;
278 int ret;
279
280 DRM_DEBUG("\n");
281
David Herrmann1bb72532013-10-02 11:23:34 +0200282 dev = drm_dev_alloc(driver, &pdev->dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600283 if (!dev)
284 return -ENOMEM;
285
286 ret = pci_enable_device(pdev);
287 if (ret)
David Herrmannc22f0ac2013-10-02 11:23:35 +0200288 goto err_free;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600289
Jordan Crousedcdb1672010-05-27 13:40:25 -0600290 dev->pdev = pdev;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600291#ifdef __alpha__
292 dev->hose = pdev->sysdata;
293#endif
294
David Herrmannc22f0ac2013-10-02 11:23:35 +0200295 if (drm_core_check_feature(dev, DRIVER_MODESET))
Jordan Crousedcdb1672010-05-27 13:40:25 -0600296 pci_set_drvdata(pdev, dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600297
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100298 drm_pci_agp_init(dev);
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100299
David Herrmannc22f0ac2013-10-02 11:23:35 +0200300 ret = drm_dev_register(dev, ent->driver_data);
301 if (ret)
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100302 goto err_agp;
Jordan Crousedcdb1672010-05-27 13:40:25 -0600303
304 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
305 driver->name, driver->major, driver->minor, driver->patchlevel,
306 driver->date, pci_name(pdev), dev->primary->index);
307
Daniel Vetterb3f23332013-12-11 11:34:31 +0100308 /* No locking needed since shadow-attach is single-threaded since it may
309 * only be called from the per-driver module init hook. */
310 if (!drm_core_check_feature(dev, DRIVER_MODESET))
311 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
312
Jordan Crousedcdb1672010-05-27 13:40:25 -0600313 return 0;
314
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100315err_agp:
Daniel Vetter2c695fa2013-12-11 11:34:36 +0100316 drm_pci_agp_destroy(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600317 pci_disable_device(pdev);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200318err_free:
David Herrmann099d1c22014-01-29 10:21:36 +0100319 drm_dev_unref(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600320 return ret;
321}
322EXPORT_SYMBOL(drm_get_pci_dev);
323
324/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200325 * drm_pci_init - Register matching PCI devices with the DRM subsystem
326 * @driver: DRM device driver
327 * @pdriver: PCI device driver
Jordan Crousedcdb1672010-05-27 13:40:25 -0600328 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200329 * Initializes a drm_device structures, registering the stubs and initializing
330 * the AGP device.
Jordan Crousedcdb1672010-05-27 13:40:25 -0600331 *
Daniel Vetter6e3f7972015-09-28 21:46:35 +0200332 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
333 * pci_register_driver() directly, this function only provides shadow-binding
334 * support for old legacy drivers on top of that core pci function.
335 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200336 * Return: 0 on success or a negative error code on failure.
Jordan Crousedcdb1672010-05-27 13:40:25 -0600337 */
Dave Airlie8410ea32010-12-15 03:16:38 +1000338int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
Jordan Crousedcdb1672010-05-27 13:40:25 -0600339{
340 struct pci_dev *pdev = NULL;
341 const struct pci_device_id *pid;
342 int i;
343
Dave Airlie8410ea32010-12-15 03:16:38 +1000344 DRM_DEBUG("\n");
345
Jordan Crousedcdb1672010-05-27 13:40:25 -0600346 if (driver->driver_features & DRIVER_MODESET)
Dave Airlie8410ea32010-12-15 03:16:38 +1000347 return pci_register_driver(pdriver);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600348
349 /* If not using KMS, fall back to stealth mode manual scanning. */
Daniel Vetterb3f23332013-12-11 11:34:31 +0100350 INIT_LIST_HEAD(&driver->legacy_dev_list);
Dave Airlie8410ea32010-12-15 03:16:38 +1000351 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
352 pid = &pdriver->id_table[i];
Jordan Crousedcdb1672010-05-27 13:40:25 -0600353
354 /* Loop around setting up a DRM device for each PCI device
355 * matching our ID and device class. If we had the internal
356 * function that pci_get_subsys and pci_get_class used, we'd
357 * be able to just pass pid in instead of doing a two-stage
358 * thing.
359 */
360 pdev = NULL;
361 while ((pdev =
362 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
363 pid->subdevice, pdev)) != NULL) {
364 if ((pdev->class & pid->class_mask) != pid->class)
365 continue;
366
367 /* stealth mode requires a manual probe */
368 pci_dev_get(pdev);
369 drm_get_pci_dev(pdev, pid, driver);
370 }
371 }
372 return 0;
373}
374
Dave Airlief4297782012-06-27 08:35:53 +0100375int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
376{
377 struct pci_dev *root;
Bjorn Helgaasdd66cc22013-01-04 19:10:42 +0000378 u32 lnkcap, lnkcap2;
Dave Airlief4297782012-06-27 08:35:53 +0100379
380 *mask = 0;
381 if (!dev->pdev)
382 return -EINVAL;
383
Dave Airlief4297782012-06-27 08:35:53 +0100384 root = dev->pdev->bus->self;
385
Dave Airlief4297782012-06-27 08:35:53 +0100386 /* we've been informed via and serverworks don't make the cut */
387 if (root->vendor == PCI_VENDOR_ID_VIA ||
388 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
389 return -EINVAL;
390
Bjorn Helgaasdd66cc22013-01-04 19:10:42 +0000391 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
392 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
Dave Airlief4297782012-06-27 08:35:53 +0100393
Bjorn Helgaasdd66cc22013-01-04 19:10:42 +0000394 if (lnkcap2) { /* PCIe r3.0-compliant */
Dave Airlief4297782012-06-27 08:35:53 +0100395 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
396 *mask |= DRM_PCIE_SPEED_25;
397 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
398 *mask |= DRM_PCIE_SPEED_50;
399 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
400 *mask |= DRM_PCIE_SPEED_80;
Bjorn Helgaasdd66cc22013-01-04 19:10:42 +0000401 } else { /* pre-r3.0 */
Bjorn Helgaas9fe04232013-01-04 19:10:32 +0000402 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
Dave Airlief4297782012-06-27 08:35:53 +0100403 *mask |= DRM_PCIE_SPEED_25;
Bjorn Helgaas9fe04232013-01-04 19:10:32 +0000404 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
Bjorn Helgaasf8acf6f2013-01-04 19:10:37 +0000405 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
Dave Airlief4297782012-06-27 08:35:53 +0100406 }
407
408 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
409 return 0;
410}
411EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700412
Alex Deucher60d8edd2015-11-11 23:14:39 -0500413int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
414{
415 struct pci_dev *root;
416 u32 lnkcap;
417
418 *mlw = 0;
419 if (!dev->pdev)
420 return -EINVAL;
421
422 root = dev->pdev->bus->self;
423
424 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
425
426 *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
427
428 DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
429 return 0;
430}
431EXPORT_SYMBOL(drm_pcie_get_max_link_width);
432
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700433#else
434
435int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
436{
437 return -1;
438}
439
Daniel Vetter4efafeb2013-12-11 11:34:38 +0100440void drm_pci_agp_destroy(struct drm_device *dev) {}
Daniel Vettereaaf8f02013-08-28 15:19:23 +0200441
442int drm_irq_by_busid(struct drm_device *dev, void *data,
443 struct drm_file *file_priv)
444{
445 return -EINVAL;
446}
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100447
448int drm_pci_set_unique(struct drm_device *dev,
449 struct drm_master *master,
450 struct drm_unique *u)
451{
452 return -EINVAL;
453}
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700454#endif
455
456EXPORT_SYMBOL(drm_pci_init);
457
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200458/**
459 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
460 * @driver: DRM device driver
461 * @pdriver: PCI device driver
462 *
463 * Unregisters one or more devices matched by a PCI driver from the DRM
464 * subsystem.
Daniel Vetter6e3f7972015-09-28 21:46:35 +0200465 *
466 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
467 * pci_unregister_driver() directly, this function only provides shadow-binding
468 * support for old legacy drivers on top of that core pci function.
Thierry Redingc6a1af8a2014-05-19 13:39:07 +0200469 */
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700470void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
471{
472 struct drm_device *dev, *tmp;
473 DRM_DEBUG("\n");
474
475 if (driver->driver_features & DRIVER_MODESET) {
476 pci_unregister_driver(pdriver);
477 } else {
Daniel Vetterb3f23332013-12-11 11:34:31 +0100478 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
479 legacy_dev_list) {
Daniel Vetterb3f23332013-12-11 11:34:31 +0100480 list_del(&dev->legacy_dev_list);
Daniel Vetterc94adc42014-01-30 17:58:38 +0100481 drm_put_dev(dev);
Daniel Vetterb3f23332013-12-11 11:34:31 +0100482 }
Bjorn Helgaas93711d82013-02-08 15:27:01 -0700483 }
484 DRM_INFO("Module unloaded\n");
485}
486EXPORT_SYMBOL(drm_pci_exit);