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1/*
2 * Copyright 2003 José Fonseca.
3 * 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/dma-mapping.h>
26#include <linux/export.h>
27#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>
33#include <drm/drm_print.h>
34
35#include "drm_internal.h"
36#include "drm_legacy.h"
37
38#ifdef CONFIG_DRM_LEGACY
39
40/**
41 * 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 *
46 * FIXME: This is a needless abstraction of the Linux dma-api and should be
47 * removed.
48 *
49 * Return: A handle to the allocated memory block on success or NULL on
50 * failure.
51 */
52drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
53{
54 drm_dma_handle_t *dmah;
55
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
63 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
64 if (!dmah)
65 return NULL;
66
67 dmah->size = size;
68 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
69 &dmah->busaddr,
70 GFP_KERNEL);
71
72 if (dmah->vaddr == NULL) {
73 kfree(dmah);
74 return NULL;
75 }
76
77 return dmah;
78}
79EXPORT_SYMBOL(drm_pci_alloc);
80
81/**
82 * drm_pci_free - Free a PCI consistent memory block
83 * @dev: DRM device
84 * @dmah: handle to memory block
85 *
86 * FIXME: This is a needless abstraction of the Linux dma-api and should be
87 * removed.
88 */
89void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
90{
91 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
92 dmah->busaddr);
93 kfree(dmah);
94}
95
96EXPORT_SYMBOL(drm_pci_free);
97#endif
98
99static 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
113int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
114{
115 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)
121 return -ENOMEM;
122
123 master->unique_len = strlen(master->unique);
124 return 0;
125}
126
127static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
128{
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
141/**
142 * 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.
146 *
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.
150 *
151 * Return: 0 on success or a negative error code on failure.
152 */
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
158 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
159 return -EOPNOTSUPP;
160
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))
166 return -EOPNOTSUPP;
167
168 return drm_pci_irq_by_busid(dev, p);
169}
170
171void 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
183static void drm_pci_agp_init(struct drm_device *dev)
184{
185 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
186 if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
187 dev->agp = drm_agp_init(dev);
188 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);
193 }
194 }
195}
196
197static int drm_get_pci_dev(struct pci_dev *pdev,
198 const struct pci_device_id *ent,
199 struct drm_driver *driver)
200{
201 struct drm_device *dev;
202 int ret;
203
204 DRM_DEBUG("\n");
205
206 dev = drm_dev_alloc(driver, &pdev->dev);
207 if (IS_ERR(dev))
208 return PTR_ERR(dev);
209
210 ret = pci_enable_device(pdev);
211 if (ret)
212 goto err_free;
213
214 dev->pdev = pdev;
215#ifdef __alpha__
216 dev->hose = pdev->sysdata;
217#endif
218
219 if (drm_core_check_feature(dev, DRIVER_MODESET))
220 pci_set_drvdata(pdev, dev);
221
222 drm_pci_agp_init(dev);
223
224 ret = drm_dev_register(dev, ent->driver_data);
225 if (ret)
226 goto err_agp;
227
228 /* No locking needed since shadow-attach is single-threaded since it may
229 * only be called from the per-driver module init hook. */
230 if (drm_core_check_feature(dev, DRIVER_LEGACY))
231 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
232
233 return 0;
234
235err_agp:
236 drm_pci_agp_destroy(dev);
237 pci_disable_device(pdev);
238err_free:
239 drm_dev_put(dev);
240 return ret;
241}
242
243/**
244 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
245 * @driver: DRM device driver
246 * @pdriver: PCI device driver
247 *
248 * This is only used by legacy dri1 drivers and deprecated.
249 *
250 * Return: 0 on success or a negative error code on failure.
251 */
252int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
253{
254 struct pci_dev *pdev = NULL;
255 const struct pci_device_id *pid;
256 int i;
257
258 DRM_DEBUG("\n");
259
260 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
261 return -EINVAL;
262
263 /* If not using KMS, fall back to stealth mode manual scanning. */
264 INIT_LIST_HEAD(&driver->legacy_dev_list);
265 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
266 pid = &pdriver->id_table[i];
267
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}
288EXPORT_SYMBOL(drm_legacy_pci_init);
289
290/**
291 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
292 * @driver: DRM device driver
293 * @pdriver: PCI device driver
294 *
295 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
296 * is deprecated and only used by dri1 drivers.
297 */
298void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
299{
300 struct drm_device *dev, *tmp;
301
302 DRM_DEBUG("\n");
303
304 if (!(driver->driver_features & DRIVER_LEGACY)) {
305 WARN_ON(1);
306 } else {
307 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
308 legacy_dev_list) {
309 list_del(&dev->legacy_dev_list);
310 drm_put_dev(dev);
311 }
312 }
313 DRM_INFO("Module unloaded\n");
314}
315EXPORT_SYMBOL(drm_legacy_pci_exit);
316
317#endif
1/*
2 * Copyright 2003 José Fonseca.
3 * 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>
26#include <linux/slab.h>
27#include <linux/dma-mapping.h>
28#include <linux/export.h>
29#include <drm/drmP.h>
30#include "drm_internal.h"
31#include "drm_legacy.h"
32
33/**
34 * 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.
41 */
42drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
43{
44 drm_dma_handle_t *dmah;
45 unsigned long addr;
46 size_t sz;
47
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
55 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
56 if (!dmah)
57 return NULL;
58
59 dmah->size = size;
60 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
61
62 if (dmah->vaddr == NULL) {
63 kfree(dmah);
64 return NULL;
65 }
66
67 memset(dmah->vaddr, 0, size);
68
69 /* 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) {
73 SetPageReserved(virt_to_page((void *)addr));
74 }
75
76 return dmah;
77}
78
79EXPORT_SYMBOL(drm_pci_alloc);
80
81/*
82 * Free a PCI consistent memory block without freeing its descriptor.
83 *
84 * This function is for internal use in the Linux-specific DRM core code.
85 */
86void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
87{
88 unsigned long addr;
89 size_t sz;
90
91 if (dmah->vaddr) {
92 /* 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) {
96 ClearPageReserved(virt_to_page((void *)addr));
97 }
98 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
99 dmah->busaddr);
100 }
101}
102
103/**
104 * drm_pci_free - Free a PCI consistent memory block
105 * @dev: DRM device
106 * @dmah: handle to memory block
107 */
108void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
109{
110 __drm_legacy_pci_free(dev, dmah);
111 kfree(dmah);
112}
113
114EXPORT_SYMBOL(drm_pci_free);
115
116#ifdef CONFIG_PCI
117
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
132int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
133{
134 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)
140 return -ENOMEM;
141
142 master->unique_len = strlen(master->unique);
143 return 0;
144}
145EXPORT_SYMBOL(drm_pci_set_busid);
146
147static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
148{
149 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
150 (p->busnum & 0xff) != dev->pdev->bus->number ||
151 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
152 return -EINVAL;
153
154 p->irq = dev->pdev->irq;
155
156 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
157 p->irq);
158 return 0;
159}
160
161/**
162 * drm_irq_by_busid - Get interrupt from bus ID
163 * @dev: DRM device
164 * @data: IOCTL parameter pointing to a drm_irq_busid structure
165 * @file_priv: DRM file private.
166 *
167 * Finds the PCI device with the specified bus id and gets its IRQ number.
168 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
169 * to that of the device that this DRM instance attached to.
170 *
171 * Return: 0 on success or a negative error code on failure.
172 */
173int drm_irq_by_busid(struct drm_device *dev, void *data,
174 struct drm_file *file_priv)
175{
176 struct drm_irq_busid *p = data;
177
178 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
179 return -EINVAL;
180
181 /* UMS was only ever support on PCI devices. */
182 if (WARN_ON(!dev->pdev))
183 return -EINVAL;
184
185 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
186 return -EINVAL;
187
188 return drm_pci_irq_by_busid(dev, p);
189}
190
191static void drm_pci_agp_init(struct drm_device *dev)
192{
193 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
194 if (drm_pci_device_is_agp(dev))
195 dev->agp = drm_agp_init(dev);
196 if (dev->agp) {
197 dev->agp->agp_mtrr = arch_phys_wc_add(
198 dev->agp->agp_info.aper_base,
199 dev->agp->agp_info.aper_size *
200 1024 * 1024);
201 }
202 }
203}
204
205void drm_pci_agp_destroy(struct drm_device *dev)
206{
207 if (dev->agp) {
208 arch_phys_wc_del(dev->agp->agp_mtrr);
209 drm_legacy_agp_clear(dev);
210 kfree(dev->agp);
211 dev->agp = NULL;
212 }
213}
214
215/**
216 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
217 * @pdev: PCI device
218 * @ent: entry from the PCI ID table that matches @pdev
219 * @driver: DRM device driver
220 *
221 * Attempt to gets inter module "drm" information. If we are first
222 * then register the character device and inter module information.
223 * Try and register, if we fail to register, backout previous work.
224 *
225 * NOTE: This function is deprecated, please use drm_dev_alloc() and
226 * drm_dev_register() instead and remove your ->load() callback.
227 *
228 * Return: 0 on success or a negative error code on failure.
229 */
230int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
231 struct drm_driver *driver)
232{
233 struct drm_device *dev;
234 int ret;
235
236 DRM_DEBUG("\n");
237
238 dev = drm_dev_alloc(driver, &pdev->dev);
239 if (IS_ERR(dev))
240 return PTR_ERR(dev);
241
242 ret = pci_enable_device(pdev);
243 if (ret)
244 goto err_free;
245
246 dev->pdev = pdev;
247#ifdef __alpha__
248 dev->hose = pdev->sysdata;
249#endif
250
251 if (drm_core_check_feature(dev, DRIVER_MODESET))
252 pci_set_drvdata(pdev, dev);
253
254 drm_pci_agp_init(dev);
255
256 ret = drm_dev_register(dev, ent->driver_data);
257 if (ret)
258 goto err_agp;
259
260 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
261 driver->name, driver->major, driver->minor, driver->patchlevel,
262 driver->date, pci_name(pdev), dev->primary->index);
263
264 /* No locking needed since shadow-attach is single-threaded since it may
265 * only be called from the per-driver module init hook. */
266 if (drm_core_check_feature(dev, DRIVER_LEGACY))
267 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
268
269 return 0;
270
271err_agp:
272 drm_pci_agp_destroy(dev);
273 pci_disable_device(pdev);
274err_free:
275 drm_dev_unref(dev);
276 return ret;
277}
278EXPORT_SYMBOL(drm_get_pci_dev);
279
280/**
281 * drm_pci_init - Register matching PCI devices with the DRM subsystem
282 * @driver: DRM device driver
283 * @pdriver: PCI device driver
284 *
285 * Initializes a drm_device structures, registering the stubs and initializing
286 * the AGP device.
287 *
288 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
289 * pci_register_driver() directly, this function only provides shadow-binding
290 * support for old legacy drivers on top of that core pci function.
291 *
292 * Return: 0 on success or a negative error code on failure.
293 */
294int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
295{
296 struct pci_dev *pdev = NULL;
297 const struct pci_device_id *pid;
298 int i;
299
300 DRM_DEBUG("\n");
301
302 if (!(driver->driver_features & DRIVER_LEGACY))
303 return pci_register_driver(pdriver);
304
305 /* If not using KMS, fall back to stealth mode manual scanning. */
306 INIT_LIST_HEAD(&driver->legacy_dev_list);
307 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
308 pid = &pdriver->id_table[i];
309
310 /* Loop around setting up a DRM device for each PCI device
311 * matching our ID and device class. If we had the internal
312 * function that pci_get_subsys and pci_get_class used, we'd
313 * be able to just pass pid in instead of doing a two-stage
314 * thing.
315 */
316 pdev = NULL;
317 while ((pdev =
318 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
319 pid->subdevice, pdev)) != NULL) {
320 if ((pdev->class & pid->class_mask) != pid->class)
321 continue;
322
323 /* stealth mode requires a manual probe */
324 pci_dev_get(pdev);
325 drm_get_pci_dev(pdev, pid, driver);
326 }
327 }
328 return 0;
329}
330
331int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
332{
333 struct pci_dev *root;
334 u32 lnkcap, lnkcap2;
335
336 *mask = 0;
337 if (!dev->pdev)
338 return -EINVAL;
339
340 root = dev->pdev->bus->self;
341
342 /* we've been informed via and serverworks don't make the cut */
343 if (root->vendor == PCI_VENDOR_ID_VIA ||
344 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
345 return -EINVAL;
346
347 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
348 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
349
350 if (lnkcap2) { /* PCIe r3.0-compliant */
351 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
352 *mask |= DRM_PCIE_SPEED_25;
353 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
354 *mask |= DRM_PCIE_SPEED_50;
355 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
356 *mask |= DRM_PCIE_SPEED_80;
357 } else { /* pre-r3.0 */
358 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
359 *mask |= DRM_PCIE_SPEED_25;
360 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
361 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
362 }
363
364 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
365 return 0;
366}
367EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
368
369int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
370{
371 struct pci_dev *root;
372 u32 lnkcap;
373
374 *mlw = 0;
375 if (!dev->pdev)
376 return -EINVAL;
377
378 root = dev->pdev->bus->self;
379
380 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
381
382 *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
383
384 DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
385 return 0;
386}
387EXPORT_SYMBOL(drm_pcie_get_max_link_width);
388
389#else
390
391int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
392{
393 return -1;
394}
395
396void drm_pci_agp_destroy(struct drm_device *dev) {}
397
398int drm_irq_by_busid(struct drm_device *dev, void *data,
399 struct drm_file *file_priv)
400{
401 return -EINVAL;
402}
403#endif
404
405EXPORT_SYMBOL(drm_pci_init);
406
407/**
408 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
409 * @driver: DRM device driver
410 * @pdriver: PCI device driver
411 *
412 * Unregisters one or more devices matched by a PCI driver from the DRM
413 * subsystem.
414 *
415 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
416 * pci_unregister_driver() directly, this function only provides shadow-binding
417 * support for old legacy drivers on top of that core pci function.
418 */
419void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
420{
421 struct drm_device *dev, *tmp;
422 DRM_DEBUG("\n");
423
424 if (!(driver->driver_features & DRIVER_LEGACY)) {
425 pci_unregister_driver(pdriver);
426 } else {
427 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
428 legacy_dev_list) {
429 list_del(&dev->legacy_dev_list);
430 drm_put_dev(dev);
431 }
432 }
433 DRM_INFO("Module unloaded\n");
434}
435EXPORT_SYMBOL(drm_pci_exit);