Line data Source code
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/list.h>
28 : #include <linux/mutex.h>
29 : #include <linux/pci.h>
30 : #include <linux/slab.h>
31 :
32 : #include <drm/drm.h>
33 : #include <drm/drm_drv.h>
34 : #include <drm/drm_print.h>
35 :
36 : #include "drm_internal.h"
37 : #include "drm_legacy.h"
38 :
39 : #ifdef CONFIG_DRM_LEGACY
40 : /* List of devices hanging off drivers with stealth attach. */
41 : static LIST_HEAD(legacy_dev_list);
42 : static DEFINE_MUTEX(legacy_dev_list_lock);
43 : #endif
44 :
45 : static int drm_get_pci_domain(struct drm_device *dev)
46 : {
47 : #ifndef __alpha__
48 : /* For historical reasons, drm_get_pci_domain() is busticated
49 : * on most archs and has to remain so for userspace interface
50 : * < 1.4, except on alpha which was right from the beginning
51 : */
52 : if (dev->if_version < 0x10004)
53 : return 0;
54 : #endif /* __alpha__ */
55 :
56 : return pci_domain_nr(to_pci_dev(dev->dev)->bus);
57 : }
58 :
59 0 : int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
60 : {
61 0 : struct pci_dev *pdev = to_pci_dev(dev->dev);
62 :
63 0 : master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
64 : drm_get_pci_domain(dev),
65 0 : pdev->bus->number,
66 0 : PCI_SLOT(pdev->devfn),
67 0 : PCI_FUNC(pdev->devfn));
68 0 : if (!master->unique)
69 : return -ENOMEM;
70 :
71 0 : master->unique_len = strlen(master->unique);
72 0 : return 0;
73 : }
74 :
75 : #ifdef CONFIG_DRM_LEGACY
76 :
77 : static int drm_legacy_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
78 : {
79 : struct pci_dev *pdev = to_pci_dev(dev->dev);
80 :
81 : if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
82 : (p->busnum & 0xff) != pdev->bus->number ||
83 : p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
84 : return -EINVAL;
85 :
86 : p->irq = pdev->irq;
87 :
88 : DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
89 : p->irq);
90 : return 0;
91 : }
92 :
93 : /**
94 : * drm_legacy_irq_by_busid - Get interrupt from bus ID
95 : * @dev: DRM device
96 : * @data: IOCTL parameter pointing to a drm_irq_busid structure
97 : * @file_priv: DRM file private.
98 : *
99 : * Finds the PCI device with the specified bus id and gets its IRQ number.
100 : * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
101 : * to that of the device that this DRM instance attached to.
102 : *
103 : * Return: 0 on success or a negative error code on failure.
104 : */
105 : int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
106 : struct drm_file *file_priv)
107 : {
108 : struct drm_irq_busid *p = data;
109 :
110 : if (!drm_core_check_feature(dev, DRIVER_LEGACY))
111 : return -EOPNOTSUPP;
112 :
113 : /* UMS was only ever support on PCI devices. */
114 : if (WARN_ON(!dev_is_pci(dev->dev)))
115 : return -EINVAL;
116 :
117 : if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
118 : return -EOPNOTSUPP;
119 :
120 : return drm_legacy_pci_irq_by_busid(dev, p);
121 : }
122 :
123 : void drm_legacy_pci_agp_destroy(struct drm_device *dev)
124 : {
125 : if (dev->agp) {
126 : arch_phys_wc_del(dev->agp->agp_mtrr);
127 : drm_legacy_agp_clear(dev);
128 : kfree(dev->agp);
129 : dev->agp = NULL;
130 : }
131 : }
132 :
133 : static void drm_legacy_pci_agp_init(struct drm_device *dev)
134 : {
135 : if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
136 : if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
137 : dev->agp = drm_legacy_agp_init(dev);
138 : if (dev->agp) {
139 : dev->agp->agp_mtrr = arch_phys_wc_add(
140 : dev->agp->agp_info.aper_base,
141 : dev->agp->agp_info.aper_size *
142 : 1024 * 1024);
143 : }
144 : }
145 : }
146 :
147 : static int drm_legacy_get_pci_dev(struct pci_dev *pdev,
148 : const struct pci_device_id *ent,
149 : const struct drm_driver *driver)
150 : {
151 : struct drm_device *dev;
152 : int ret;
153 :
154 : DRM_DEBUG("\n");
155 :
156 : dev = drm_dev_alloc(driver, &pdev->dev);
157 : if (IS_ERR(dev))
158 : return PTR_ERR(dev);
159 :
160 : ret = pci_enable_device(pdev);
161 : if (ret)
162 : goto err_free;
163 :
164 : #ifdef __alpha__
165 : dev->hose = pdev->sysdata;
166 : #endif
167 :
168 : drm_legacy_pci_agp_init(dev);
169 :
170 : ret = drm_dev_register(dev, ent->driver_data);
171 : if (ret)
172 : goto err_agp;
173 :
174 : if (drm_core_check_feature(dev, DRIVER_LEGACY)) {
175 : mutex_lock(&legacy_dev_list_lock);
176 : list_add_tail(&dev->legacy_dev_list, &legacy_dev_list);
177 : mutex_unlock(&legacy_dev_list_lock);
178 : }
179 :
180 : return 0;
181 :
182 : err_agp:
183 : drm_legacy_pci_agp_destroy(dev);
184 : pci_disable_device(pdev);
185 : err_free:
186 : drm_dev_put(dev);
187 : return ret;
188 : }
189 :
190 : /**
191 : * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
192 : * @driver: DRM device driver
193 : * @pdriver: PCI device driver
194 : *
195 : * This is only used by legacy dri1 drivers and deprecated.
196 : *
197 : * Return: 0 on success or a negative error code on failure.
198 : */
199 : int drm_legacy_pci_init(const struct drm_driver *driver,
200 : struct pci_driver *pdriver)
201 : {
202 : struct pci_dev *pdev = NULL;
203 : const struct pci_device_id *pid;
204 : int i;
205 :
206 : DRM_DEBUG("\n");
207 :
208 : if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
209 : return -EINVAL;
210 :
211 : /* If not using KMS, fall back to stealth mode manual scanning. */
212 : for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
213 : pid = &pdriver->id_table[i];
214 :
215 : /* Loop around setting up a DRM device for each PCI device
216 : * matching our ID and device class. If we had the internal
217 : * function that pci_get_subsys and pci_get_class used, we'd
218 : * be able to just pass pid in instead of doing a two-stage
219 : * thing.
220 : */
221 : pdev = NULL;
222 : while ((pdev =
223 : pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
224 : pid->subdevice, pdev)) != NULL) {
225 : if ((pdev->class & pid->class_mask) != pid->class)
226 : continue;
227 :
228 : /* stealth mode requires a manual probe */
229 : pci_dev_get(pdev);
230 : drm_legacy_get_pci_dev(pdev, pid, driver);
231 : }
232 : }
233 : return 0;
234 : }
235 : EXPORT_SYMBOL(drm_legacy_pci_init);
236 :
237 : /**
238 : * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
239 : * @driver: DRM device driver
240 : * @pdriver: PCI device driver
241 : *
242 : * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
243 : * is deprecated and only used by dri1 drivers.
244 : */
245 : void drm_legacy_pci_exit(const struct drm_driver *driver,
246 : struct pci_driver *pdriver)
247 : {
248 : struct drm_device *dev, *tmp;
249 :
250 : DRM_DEBUG("\n");
251 :
252 : if (!(driver->driver_features & DRIVER_LEGACY)) {
253 : WARN_ON(1);
254 : } else {
255 : mutex_lock(&legacy_dev_list_lock);
256 : list_for_each_entry_safe(dev, tmp, &legacy_dev_list,
257 : legacy_dev_list) {
258 : if (dev->driver == driver) {
259 : list_del(&dev->legacy_dev_list);
260 : drm_put_dev(dev);
261 : }
262 : }
263 : mutex_unlock(&legacy_dev_list_lock);
264 : }
265 : DRM_INFO("Module unloaded\n");
266 : }
267 : EXPORT_SYMBOL(drm_legacy_pci_exit);
268 :
269 : #endif
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