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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/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_pci.h>
34#include <drm/drm_print.h>
35
36#include "drm_internal.h"
37#include "drm_legacy.h"
38
39/**
40 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
41 * @dev: DRM device
42 * @size: size of block to allocate
43 * @align: alignment of block
44 *
45 * FIXME: This is a needless abstraction of the Linux dma-api and should be
46 * removed.
47 *
48 * Return: A handle to the allocated memory block on success or NULL on
49 * failure.
50 */
51drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
52{
53 drm_dma_handle_t *dmah;
54 unsigned long addr;
55 size_t sz;
56
57 /* pci_alloc_consistent only guarantees alignment to the smallest
58 * PAGE_SIZE order which is greater than or equal to the requested size.
59 * Return NULL here for now to make sure nobody tries for larger alignment
60 */
61 if (align > size)
62 return NULL;
63
64 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
65 if (!dmah)
66 return NULL;
67
68 dmah->size = size;
69 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
70 &dmah->busaddr,
71 GFP_KERNEL | __GFP_COMP);
72
73 if (dmah->vaddr == NULL) {
74 kfree(dmah);
75 return NULL;
76 }
77
78 /* XXX - Is virt_to_page() legal for consistent mem? */
79 /* Reserve */
80 for (addr = (unsigned long)dmah->vaddr, sz = size;
81 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
82 SetPageReserved(virt_to_page((void *)addr));
83 }
84
85 return dmah;
86}
87
88EXPORT_SYMBOL(drm_pci_alloc);
89
90/*
91 * Free a PCI consistent memory block without freeing its descriptor.
92 *
93 * This function is for internal use in the Linux-specific DRM core code.
94 */
95void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
96{
97 unsigned long addr;
98 size_t sz;
99
100 if (dmah->vaddr) {
101 /* XXX - Is virt_to_page() legal for consistent mem? */
102 /* Unreserve */
103 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
104 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
105 ClearPageReserved(virt_to_page((void *)addr));
106 }
107 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
108 dmah->busaddr);
109 }
110}
111
112/**
113 * drm_pci_free - Free a PCI consistent memory block
114 * @dev: DRM device
115 * @dmah: handle to memory block
116 *
117 * FIXME: This is a needless abstraction of the Linux dma-api and should be
118 * removed.
119 */
120void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
121{
122 __drm_legacy_pci_free(dev, dmah);
123 kfree(dmah);
124}
125
126EXPORT_SYMBOL(drm_pci_free);
127
128#ifdef CONFIG_PCI
129
130static int drm_get_pci_domain(struct drm_device *dev)
131{
132#ifndef __alpha__
133 /* For historical reasons, drm_get_pci_domain() is busticated
134 * on most archs and has to remain so for userspace interface
135 * < 1.4, except on alpha which was right from the beginning
136 */
137 if (dev->if_version < 0x10004)
138 return 0;
139#endif /* __alpha__ */
140
141 return pci_domain_nr(dev->pdev->bus);
142}
143
144int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
145{
146 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
147 drm_get_pci_domain(dev),
148 dev->pdev->bus->number,
149 PCI_SLOT(dev->pdev->devfn),
150 PCI_FUNC(dev->pdev->devfn));
151 if (!master->unique)
152 return -ENOMEM;
153
154 master->unique_len = strlen(master->unique);
155 return 0;
156}
157
158static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
159{
160 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
161 (p->busnum & 0xff) != dev->pdev->bus->number ||
162 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
163 return -EINVAL;
164
165 p->irq = dev->pdev->irq;
166
167 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
168 p->irq);
169 return 0;
170}
171
172/**
173 * drm_irq_by_busid - Get interrupt from bus ID
174 * @dev: DRM device
175 * @data: IOCTL parameter pointing to a drm_irq_busid structure
176 * @file_priv: DRM file private.
177 *
178 * Finds the PCI device with the specified bus id and gets its IRQ number.
179 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
180 * to that of the device that this DRM instance attached to.
181 *
182 * Return: 0 on success or a negative error code on failure.
183 */
184int drm_irq_by_busid(struct drm_device *dev, void *data,
185 struct drm_file *file_priv)
186{
187 struct drm_irq_busid *p = data;
188
189 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
190 return -EOPNOTSUPP;
191
192 /* UMS was only ever support on PCI devices. */
193 if (WARN_ON(!dev->pdev))
194 return -EINVAL;
195
196 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
197 return -EOPNOTSUPP;
198
199 return drm_pci_irq_by_busid(dev, p);
200}
201
202static void drm_pci_agp_init(struct drm_device *dev)
203{
204 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
205 if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
206 dev->agp = drm_agp_init(dev);
207 if (dev->agp) {
208 dev->agp->agp_mtrr = arch_phys_wc_add(
209 dev->agp->agp_info.aper_base,
210 dev->agp->agp_info.aper_size *
211 1024 * 1024);
212 }
213 }
214}
215
216void drm_pci_agp_destroy(struct drm_device *dev)
217{
218 if (dev->agp) {
219 arch_phys_wc_del(dev->agp->agp_mtrr);
220 drm_legacy_agp_clear(dev);
221 kfree(dev->agp);
222 dev->agp = NULL;
223 }
224}
225
226/**
227 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
228 * @pdev: PCI device
229 * @ent: entry from the PCI ID table that matches @pdev
230 * @driver: DRM device driver
231 *
232 * Attempt to gets inter module "drm" information. If we are first
233 * then register the character device and inter module information.
234 * Try and register, if we fail to register, backout previous work.
235 *
236 * NOTE: This function is deprecated, please use drm_dev_alloc() and
237 * drm_dev_register() instead and remove your &drm_driver.load callback.
238 *
239 * Return: 0 on success or a negative error code on failure.
240 */
241int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
242 struct drm_driver *driver)
243{
244 struct drm_device *dev;
245 int ret;
246
247 DRM_DEBUG("\n");
248
249 dev = drm_dev_alloc(driver, &pdev->dev);
250 if (IS_ERR(dev))
251 return PTR_ERR(dev);
252
253 ret = pci_enable_device(pdev);
254 if (ret)
255 goto err_free;
256
257 dev->pdev = pdev;
258#ifdef __alpha__
259 dev->hose = pdev->sysdata;
260#endif
261
262 if (drm_core_check_feature(dev, DRIVER_MODESET))
263 pci_set_drvdata(pdev, dev);
264
265 drm_pci_agp_init(dev);
266
267 ret = drm_dev_register(dev, ent->driver_data);
268 if (ret)
269 goto err_agp;
270
271 /* No locking needed since shadow-attach is single-threaded since it may
272 * only be called from the per-driver module init hook. */
273 if (drm_core_check_feature(dev, DRIVER_LEGACY))
274 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
275
276 return 0;
277
278err_agp:
279 drm_pci_agp_destroy(dev);
280 pci_disable_device(pdev);
281err_free:
282 drm_dev_put(dev);
283 return ret;
284}
285EXPORT_SYMBOL(drm_get_pci_dev);
286
287/**
288 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
289 * @driver: DRM device driver
290 * @pdriver: PCI device driver
291 *
292 * This is only used by legacy dri1 drivers and deprecated.
293 *
294 * Return: 0 on success or a negative error code on failure.
295 */
296int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
297{
298 struct pci_dev *pdev = NULL;
299 const struct pci_device_id *pid;
300 int i;
301
302 DRM_DEBUG("\n");
303
304 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
305 return -EINVAL;
306
307 /* If not using KMS, fall back to stealth mode manual scanning. */
308 INIT_LIST_HEAD(&driver->legacy_dev_list);
309 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
310 pid = &pdriver->id_table[i];
311
312 /* Loop around setting up a DRM device for each PCI device
313 * matching our ID and device class. If we had the internal
314 * function that pci_get_subsys and pci_get_class used, we'd
315 * be able to just pass pid in instead of doing a two-stage
316 * thing.
317 */
318 pdev = NULL;
319 while ((pdev =
320 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
321 pid->subdevice, pdev)) != NULL) {
322 if ((pdev->class & pid->class_mask) != pid->class)
323 continue;
324
325 /* stealth mode requires a manual probe */
326 pci_dev_get(pdev);
327 drm_get_pci_dev(pdev, pid, driver);
328 }
329 }
330 return 0;
331}
332EXPORT_SYMBOL(drm_legacy_pci_init);
333
334#else
335
336void drm_pci_agp_destroy(struct drm_device *dev) {}
337
338int drm_irq_by_busid(struct drm_device *dev, void *data,
339 struct drm_file *file_priv)
340{
341 return -EINVAL;
342}
343#endif
344
345/**
346 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
347 * @driver: DRM device driver
348 * @pdriver: PCI device driver
349 *
350 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
351 * is deprecated and only used by dri1 drivers.
352 */
353void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
354{
355 struct drm_device *dev, *tmp;
356 DRM_DEBUG("\n");
357
358 if (!(driver->driver_features & DRIVER_LEGACY)) {
359 WARN_ON(1);
360 } else {
361 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
362 legacy_dev_list) {
363 list_del(&dev->legacy_dev_list);
364 drm_put_dev(dev);
365 }
366 }
367 DRM_INFO("Module unloaded\n");
368}
369EXPORT_SYMBOL(drm_legacy_pci_exit);