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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/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
147int drm_pci_set_unique(struct drm_device *dev,
148 struct drm_master *master,
149 struct drm_unique *u)
150{
151 int domain, bus, slot, func, ret;
152
153 master->unique_len = u->unique_len;
154 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
155 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
167 /* 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
191static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
192{
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
205/**
206 * 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.
210 *
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.
214 *
215 * Return: 0 on success or a negative error code on failure.
216 */
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
235static void drm_pci_agp_init(struct drm_device *dev)
236{
237 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
238 if (drm_pci_device_is_agp(dev))
239 dev->agp = drm_agp_init(dev);
240 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);
245 }
246 }
247}
248
249void drm_pci_agp_destroy(struct drm_device *dev)
250{
251 if (dev->agp) {
252 arch_phys_wc_del(dev->agp->agp_mtrr);
253 drm_agp_clear(dev);
254 kfree(dev->agp);
255 dev->agp = NULL;
256 }
257}
258
259/**
260 * 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
264 *
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.
268 *
269 * NOTE: This function is deprecated, please use drm_dev_alloc() and
270 * drm_dev_register() instead and remove your ->load() callback.
271 *
272 * Return: 0 on success or a negative error code on failure.
273 */
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
282 dev = drm_dev_alloc(driver, &pdev->dev);
283 if (!dev)
284 return -ENOMEM;
285
286 ret = pci_enable_device(pdev);
287 if (ret)
288 goto err_free;
289
290 dev->pdev = pdev;
291#ifdef __alpha__
292 dev->hose = pdev->sysdata;
293#endif
294
295 if (drm_core_check_feature(dev, DRIVER_MODESET))
296 pci_set_drvdata(pdev, dev);
297
298 drm_pci_agp_init(dev);
299
300 ret = drm_dev_register(dev, ent->driver_data);
301 if (ret)
302 goto err_agp;
303
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
308 /* 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
313 return 0;
314
315err_agp:
316 drm_pci_agp_destroy(dev);
317 pci_disable_device(pdev);
318err_free:
319 drm_dev_unref(dev);
320 return ret;
321}
322EXPORT_SYMBOL(drm_get_pci_dev);
323
324/**
325 * drm_pci_init - Register matching PCI devices with the DRM subsystem
326 * @driver: DRM device driver
327 * @pdriver: PCI device driver
328 *
329 * Initializes a drm_device structures, registering the stubs and initializing
330 * the AGP device.
331 *
332 * 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 *
336 * Return: 0 on success or a negative error code on failure.
337 */
338int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
339{
340 struct pci_dev *pdev = NULL;
341 const struct pci_device_id *pid;
342 int i;
343
344 DRM_DEBUG("\n");
345
346 if (driver->driver_features & DRIVER_MODESET)
347 return pci_register_driver(pdriver);
348
349 /* If not using KMS, fall back to stealth mode manual scanning. */
350 INIT_LIST_HEAD(&driver->legacy_dev_list);
351 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
352 pid = &pdriver->id_table[i];
353
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
375int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
376{
377 struct pci_dev *root;
378 u32 lnkcap, lnkcap2;
379
380 *mask = 0;
381 if (!dev->pdev)
382 return -EINVAL;
383
384 root = dev->pdev->bus->self;
385
386 /* 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
391 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
392 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
393
394 if (lnkcap2) { /* PCIe r3.0-compliant */
395 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;
401 } else { /* pre-r3.0 */
402 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
403 *mask |= DRM_PCIE_SPEED_25;
404 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
405 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
406 }
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);
412
413int 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
433#else
434
435int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
436{
437 return -1;
438}
439
440void drm_pci_agp_destroy(struct drm_device *dev) {}
441
442int drm_irq_by_busid(struct drm_device *dev, void *data,
443 struct drm_file *file_priv)
444{
445 return -EINVAL;
446}
447
448int drm_pci_set_unique(struct drm_device *dev,
449 struct drm_master *master,
450 struct drm_unique *u)
451{
452 return -EINVAL;
453}
454#endif
455
456EXPORT_SYMBOL(drm_pci_init);
457
458/**
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.
465 *
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.
469 */
470void 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 {
478 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
479 legacy_dev_list) {
480 list_del(&dev->legacy_dev_list);
481 drm_put_dev(dev);
482 }
483 }
484 DRM_INFO("Module unloaded\n");
485}
486EXPORT_SYMBOL(drm_pci_exit);
1/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */
2/**
3 * \file drm_pci.c
4 * \brief Functions and ioctls to manage PCI memory
5 *
6 * \warning These interfaces aren't stable yet.
7 *
8 * \todo Implement the remaining ioctl's for the PCI pools.
9 * \todo The wrappers here are so thin that they would be better off inlined..
10 *
11 * \author José Fonseca <jrfonseca@tungstengraphics.com>
12 * \author Leif Delgass <ldelgass@retinalburn.net>
13 */
14
15/*
16 * Copyright 2003 José Fonseca.
17 * Copyright 2003 Leif Delgass.
18 * All Rights Reserved.
19 *
20 * Permission is hereby granted, free of charge, to any person obtaining a
21 * copy of this software and associated documentation files (the "Software"),
22 * to deal in the Software without restriction, including without limitation
23 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
24 * and/or sell copies of the Software, and to permit persons to whom the
25 * Software is furnished to do so, subject to the following conditions:
26 *
27 * The above copyright notice and this permission notice (including the next
28 * paragraph) shall be included in all copies or substantial portions of the
29 * Software.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
32 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
33 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
34 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
35 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
36 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 */
38
39#include <linux/pci.h>
40#include <linux/slab.h>
41#include <linux/dma-mapping.h>
42#include <linux/export.h>
43#include <drm/drmP.h>
44
45/**********************************************************************/
46/** \name PCI memory */
47/*@{*/
48
49/**
50 * \brief Allocate a PCI consistent memory block, for DMA.
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 unsigned long addr;
56 size_t sz;
57
58 /* pci_alloc_consistent only guarantees alignment to the smallest
59 * PAGE_SIZE order which is greater than or equal to the requested size.
60 * Return NULL here for now to make sure nobody tries for larger alignment
61 */
62 if (align > size)
63 return NULL;
64
65 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
66 if (!dmah)
67 return NULL;
68
69 dmah->size = size;
70 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
71
72 if (dmah->vaddr == NULL) {
73 kfree(dmah);
74 return NULL;
75 }
76
77 memset(dmah->vaddr, 0, size);
78
79 /* XXX - Is virt_to_page() legal for consistent mem? */
80 /* Reserve */
81 for (addr = (unsigned long)dmah->vaddr, sz = size;
82 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
83 SetPageReserved(virt_to_page((void *)addr));
84 }
85
86 return dmah;
87}
88
89EXPORT_SYMBOL(drm_pci_alloc);
90
91/**
92 * \brief Free a PCI consistent memory block without freeing its descriptor.
93 *
94 * This function is for internal use in the Linux-specific DRM core code.
95 */
96void __drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
97{
98 unsigned long addr;
99 size_t sz;
100
101 if (dmah->vaddr) {
102 /* XXX - Is virt_to_page() legal for consistent mem? */
103 /* Unreserve */
104 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
105 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
106 ClearPageReserved(virt_to_page((void *)addr));
107 }
108 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
109 dmah->busaddr);
110 }
111}
112
113/**
114 * \brief Free a PCI consistent memory block
115 */
116void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
117{
118 __drm_pci_free(dev, dmah);
119 kfree(dmah);
120}
121
122EXPORT_SYMBOL(drm_pci_free);
123
124#ifdef CONFIG_PCI
125
126static int drm_get_pci_domain(struct drm_device *dev)
127{
128#ifndef __alpha__
129 /* For historical reasons, drm_get_pci_domain() is busticated
130 * on most archs and has to remain so for userspace interface
131 * < 1.4, except on alpha which was right from the beginning
132 */
133 if (dev->if_version < 0x10004)
134 return 0;
135#endif /* __alpha__ */
136
137 return pci_domain_nr(dev->pdev->bus);
138}
139
140static int drm_pci_get_irq(struct drm_device *dev)
141{
142 return dev->pdev->irq;
143}
144
145static const char *drm_pci_get_name(struct drm_device *dev)
146{
147 struct pci_driver *pdriver = dev->driver->kdriver.pci;
148 return pdriver->name;
149}
150
151static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
152{
153 int len, ret;
154 struct pci_driver *pdriver = dev->driver->kdriver.pci;
155 master->unique_len = 40;
156 master->unique_size = master->unique_len;
157 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
158 if (master->unique == NULL)
159 return -ENOMEM;
160
161
162 len = snprintf(master->unique, master->unique_len,
163 "pci:%04x:%02x:%02x.%d",
164 drm_get_pci_domain(dev),
165 dev->pdev->bus->number,
166 PCI_SLOT(dev->pdev->devfn),
167 PCI_FUNC(dev->pdev->devfn));
168
169 if (len >= master->unique_len) {
170 DRM_ERROR("buffer overflow");
171 ret = -EINVAL;
172 goto err;
173 } else
174 master->unique_len = len;
175
176 dev->devname =
177 kmalloc(strlen(pdriver->name) +
178 master->unique_len + 2, GFP_KERNEL);
179
180 if (dev->devname == NULL) {
181 ret = -ENOMEM;
182 goto err;
183 }
184
185 sprintf(dev->devname, "%s@%s", pdriver->name,
186 master->unique);
187
188 return 0;
189err:
190 return ret;
191}
192
193static int drm_pci_set_unique(struct drm_device *dev,
194 struct drm_master *master,
195 struct drm_unique *u)
196{
197 int domain, bus, slot, func, ret;
198 const char *bus_name;
199
200 master->unique_len = u->unique_len;
201 master->unique_size = u->unique_len + 1;
202 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
203 if (!master->unique) {
204 ret = -ENOMEM;
205 goto err;
206 }
207
208 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
209 ret = -EFAULT;
210 goto err;
211 }
212
213 master->unique[master->unique_len] = '\0';
214
215 bus_name = dev->driver->bus->get_name(dev);
216 dev->devname = kmalloc(strlen(bus_name) +
217 strlen(master->unique) + 2, GFP_KERNEL);
218 if (!dev->devname) {
219 ret = -ENOMEM;
220 goto err;
221 }
222
223 sprintf(dev->devname, "%s@%s", bus_name,
224 master->unique);
225
226 /* Return error if the busid submitted doesn't match the device's actual
227 * busid.
228 */
229 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
230 if (ret != 3) {
231 ret = -EINVAL;
232 goto err;
233 }
234
235 domain = bus >> 8;
236 bus &= 0xff;
237
238 if ((domain != drm_get_pci_domain(dev)) ||
239 (bus != dev->pdev->bus->number) ||
240 (slot != PCI_SLOT(dev->pdev->devfn)) ||
241 (func != PCI_FUNC(dev->pdev->devfn))) {
242 ret = -EINVAL;
243 goto err;
244 }
245 return 0;
246err:
247 return ret;
248}
249
250
251static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
252{
253 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
254 (p->busnum & 0xff) != dev->pdev->bus->number ||
255 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
256 return -EINVAL;
257
258 p->irq = dev->pdev->irq;
259
260 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
261 p->irq);
262 return 0;
263}
264
265static void drm_pci_agp_init(struct drm_device *dev)
266{
267 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
268 if (drm_pci_device_is_agp(dev))
269 dev->agp = drm_agp_init(dev);
270 if (dev->agp) {
271 dev->agp->agp_mtrr = arch_phys_wc_add(
272 dev->agp->agp_info.aper_base,
273 dev->agp->agp_info.aper_size *
274 1024 * 1024);
275 }
276 }
277}
278
279void drm_pci_agp_destroy(struct drm_device *dev)
280{
281 if (dev->agp) {
282 arch_phys_wc_del(dev->agp->agp_mtrr);
283 drm_agp_clear(dev);
284 kfree(dev->agp);
285 dev->agp = NULL;
286 }
287}
288
289static struct drm_bus drm_pci_bus = {
290 .bus_type = DRIVER_BUS_PCI,
291 .get_irq = drm_pci_get_irq,
292 .get_name = drm_pci_get_name,
293 .set_busid = drm_pci_set_busid,
294 .set_unique = drm_pci_set_unique,
295 .irq_by_busid = drm_pci_irq_by_busid,
296};
297
298/**
299 * Register.
300 *
301 * \param pdev - PCI device structure
302 * \param ent entry from the PCI ID table with device type flags
303 * \return zero on success or a negative number on failure.
304 *
305 * Attempt to gets inter module "drm" information. If we are first
306 * then register the character device and inter module information.
307 * Try and register, if we fail to register, backout previous work.
308 */
309int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
310 struct drm_driver *driver)
311{
312 struct drm_device *dev;
313 int ret;
314
315 DRM_DEBUG("\n");
316
317 dev = drm_dev_alloc(driver, &pdev->dev);
318 if (!dev)
319 return -ENOMEM;
320
321 ret = pci_enable_device(pdev);
322 if (ret)
323 goto err_free;
324
325 dev->pdev = pdev;
326#ifdef __alpha__
327 dev->hose = pdev->sysdata;
328#endif
329
330 if (drm_core_check_feature(dev, DRIVER_MODESET))
331 pci_set_drvdata(pdev, dev);
332
333 drm_pci_agp_init(dev);
334
335 ret = drm_dev_register(dev, ent->driver_data);
336 if (ret)
337 goto err_agp;
338
339 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
340 driver->name, driver->major, driver->minor, driver->patchlevel,
341 driver->date, pci_name(pdev), dev->primary->index);
342
343 /* No locking needed since shadow-attach is single-threaded since it may
344 * only be called from the per-driver module init hook. */
345 if (!drm_core_check_feature(dev, DRIVER_MODESET))
346 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
347
348 return 0;
349
350err_agp:
351 drm_pci_agp_destroy(dev);
352 pci_disable_device(pdev);
353err_free:
354 drm_dev_unref(dev);
355 return ret;
356}
357EXPORT_SYMBOL(drm_get_pci_dev);
358
359/**
360 * PCI device initialization. Called direct from modules at load time.
361 *
362 * \return zero on success or a negative number on failure.
363 *
364 * Initializes a drm_device structures,registering the
365 * stubs and initializing the AGP device.
366 *
367 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
368 * after the initialization for driver customization.
369 */
370int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
371{
372 struct pci_dev *pdev = NULL;
373 const struct pci_device_id *pid;
374 int i;
375
376 DRM_DEBUG("\n");
377
378 driver->kdriver.pci = pdriver;
379 driver->bus = &drm_pci_bus;
380
381 if (driver->driver_features & DRIVER_MODESET)
382 return pci_register_driver(pdriver);
383
384 /* If not using KMS, fall back to stealth mode manual scanning. */
385 INIT_LIST_HEAD(&driver->legacy_dev_list);
386 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
387 pid = &pdriver->id_table[i];
388
389 /* Loop around setting up a DRM device for each PCI device
390 * matching our ID and device class. If we had the internal
391 * function that pci_get_subsys and pci_get_class used, we'd
392 * be able to just pass pid in instead of doing a two-stage
393 * thing.
394 */
395 pdev = NULL;
396 while ((pdev =
397 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
398 pid->subdevice, pdev)) != NULL) {
399 if ((pdev->class & pid->class_mask) != pid->class)
400 continue;
401
402 /* stealth mode requires a manual probe */
403 pci_dev_get(pdev);
404 drm_get_pci_dev(pdev, pid, driver);
405 }
406 }
407 return 0;
408}
409
410int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
411{
412 struct pci_dev *root;
413 u32 lnkcap, lnkcap2;
414
415 *mask = 0;
416 if (!dev->pdev)
417 return -EINVAL;
418
419 root = dev->pdev->bus->self;
420
421 /* we've been informed via and serverworks don't make the cut */
422 if (root->vendor == PCI_VENDOR_ID_VIA ||
423 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
424 return -EINVAL;
425
426 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
427 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
428
429 if (lnkcap2) { /* PCIe r3.0-compliant */
430 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
431 *mask |= DRM_PCIE_SPEED_25;
432 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
433 *mask |= DRM_PCIE_SPEED_50;
434 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
435 *mask |= DRM_PCIE_SPEED_80;
436 } else { /* pre-r3.0 */
437 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
438 *mask |= DRM_PCIE_SPEED_25;
439 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
440 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
441 }
442
443 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
444 return 0;
445}
446EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
447
448#else
449
450int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
451{
452 return -1;
453}
454
455void drm_pci_agp_destroy(struct drm_device *dev) {}
456#endif
457
458EXPORT_SYMBOL(drm_pci_init);
459
460/*@}*/
461void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
462{
463 struct drm_device *dev, *tmp;
464 DRM_DEBUG("\n");
465
466 if (driver->driver_features & DRIVER_MODESET) {
467 pci_unregister_driver(pdriver);
468 } else {
469 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
470 legacy_dev_list) {
471 list_del(&dev->legacy_dev_list);
472 drm_put_dev(dev);
473 }
474 }
475 DRM_INFO("Module unloaded\n");
476}
477EXPORT_SYMBOL(drm_pci_exit);