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1da177e4 | 1 | /* |
96de0e25 | 2 | * Copyright 2003 José Fonseca. |
1da177e4 LT |
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> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
195b3a2d | 27 | #include <linux/dma-mapping.h> |
2d1a8a48 | 28 | #include <linux/export.h> |
23ef59ef | 29 | #include <drm/drm_pci.h> |
760285e7 | 30 | #include <drm/drmP.h> |
43fc884e | 31 | #include "drm_internal.h" |
ba8286fa | 32 | #include "drm_legacy.h" |
1da177e4 | 33 | |
1da177e4 | 34 | /** |
c6a1af8a TR |
35 | * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA. |
36 | * @dev: DRM device | |
37 | * @size: size of block to allocate | |
38 | * @align: alignment of block | |
39 | * | |
23ef59ef DV |
40 | * FIXME: This is a needless abstraction of the Linux dma-api and should be |
41 | * removed. | |
42 | * | |
c6a1af8a TR |
43 | * Return: A handle to the allocated memory block on success or NULL on |
44 | * failure. | |
1da177e4 | 45 | */ |
e6be8d9d | 46 | drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) |
1da177e4 | 47 | { |
9c8da5eb | 48 | drm_dma_handle_t *dmah; |
ddf19b97 DA |
49 | unsigned long addr; |
50 | size_t sz; | |
1da177e4 LT |
51 | |
52 | /* pci_alloc_consistent only guarantees alignment to the smallest | |
53 | * PAGE_SIZE order which is greater than or equal to the requested size. | |
54 | * Return NULL here for now to make sure nobody tries for larger alignment | |
55 | */ | |
56 | if (align > size) | |
57 | return NULL; | |
58 | ||
9c8da5eb DA |
59 | dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); |
60 | if (!dmah) | |
61 | return NULL; | |
b5e89ed5 | 62 | |
9c8da5eb | 63 | dmah->size = size; |
ddf19b97 | 64 | dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP); |
1da177e4 | 65 | |
9c8da5eb DA |
66 | if (dmah->vaddr == NULL) { |
67 | kfree(dmah); | |
1da177e4 | 68 | return NULL; |
9c8da5eb | 69 | } |
1da177e4 | 70 | |
9c8da5eb | 71 | memset(dmah->vaddr, 0, size); |
1da177e4 | 72 | |
ddf19b97 DA |
73 | /* XXX - Is virt_to_page() legal for consistent mem? */ |
74 | /* Reserve */ | |
75 | for (addr = (unsigned long)dmah->vaddr, sz = size; | |
76 | sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { | |
e1e78533 | 77 | SetPageReserved(virt_to_page((void *)addr)); |
ddf19b97 DA |
78 | } |
79 | ||
9c8da5eb | 80 | return dmah; |
1da177e4 | 81 | } |
b5e89ed5 | 82 | |
1da177e4 LT |
83 | EXPORT_SYMBOL(drm_pci_alloc); |
84 | ||
c6a1af8a TR |
85 | /* |
86 | * Free a PCI consistent memory block without freeing its descriptor. | |
9c8da5eb DA |
87 | * |
88 | * This function is for internal use in the Linux-specific DRM core code. | |
1da177e4 | 89 | */ |
1c96e84e | 90 | void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
1da177e4 | 91 | { |
ddf19b97 DA |
92 | unsigned long addr; |
93 | size_t sz; | |
1da177e4 | 94 | |
9a298b2a | 95 | if (dmah->vaddr) { |
ddf19b97 DA |
96 | /* XXX - Is virt_to_page() legal for consistent mem? */ |
97 | /* Unreserve */ | |
98 | for (addr = (unsigned long)dmah->vaddr, sz = dmah->size; | |
99 | sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { | |
e1e78533 | 100 | ClearPageReserved(virt_to_page((void *)addr)); |
ddf19b97 DA |
101 | } |
102 | dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, | |
103 | dmah->busaddr); | |
1da177e4 | 104 | } |
1da177e4 | 105 | } |
9c8da5eb DA |
106 | |
107 | /** | |
c6a1af8a TR |
108 | * drm_pci_free - Free a PCI consistent memory block |
109 | * @dev: DRM device | |
110 | * @dmah: handle to memory block | |
23ef59ef DV |
111 | * |
112 | * FIXME: This is a needless abstraction of the Linux dma-api and should be | |
113 | * removed. | |
9c8da5eb | 114 | */ |
84b1fd10 | 115 | void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
9c8da5eb | 116 | { |
1c96e84e | 117 | __drm_legacy_pci_free(dev, dmah); |
9c8da5eb DA |
118 | kfree(dmah); |
119 | } | |
b5e89ed5 | 120 | |
1da177e4 LT |
121 | EXPORT_SYMBOL(drm_pci_free); |
122 | ||
dcdb1674 | 123 | #ifdef CONFIG_PCI |
8410ea3b DA |
124 | |
125 | static int drm_get_pci_domain(struct drm_device *dev) | |
126 | { | |
127 | #ifndef __alpha__ | |
128 | /* For historical reasons, drm_get_pci_domain() is busticated | |
129 | * on most archs and has to remain so for userspace interface | |
130 | * < 1.4, except on alpha which was right from the beginning | |
131 | */ | |
132 | if (dev->if_version < 0x10004) | |
133 | return 0; | |
134 | #endif /* __alpha__ */ | |
135 | ||
136 | return pci_domain_nr(dev->pdev->bus); | |
137 | } | |
138 | ||
915b4d11 | 139 | int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) |
8410ea3b | 140 | { |
d0a39164 DH |
141 | master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d", |
142 | drm_get_pci_domain(dev), | |
143 | dev->pdev->bus->number, | |
144 | PCI_SLOT(dev->pdev->devfn), | |
145 | PCI_FUNC(dev->pdev->devfn)); | |
146 | if (!master->unique) | |
8410ea3b DA |
147 | return -ENOMEM; |
148 | ||
d0a39164 | 149 | master->unique_len = strlen(master->unique); |
8410ea3b | 150 | return 0; |
8410ea3b DA |
151 | } |
152 | ||
45e97ab6 | 153 | static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p) |
8410ea3b DA |
154 | { |
155 | if ((p->busnum >> 8) != drm_get_pci_domain(dev) || | |
156 | (p->busnum & 0xff) != dev->pdev->bus->number || | |
157 | p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn)) | |
158 | return -EINVAL; | |
159 | ||
160 | p->irq = dev->pdev->irq; | |
161 | ||
162 | DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum, | |
163 | p->irq); | |
164 | return 0; | |
165 | } | |
166 | ||
eaaf8f0f | 167 | /** |
c6a1af8a TR |
168 | * drm_irq_by_busid - Get interrupt from bus ID |
169 | * @dev: DRM device | |
170 | * @data: IOCTL parameter pointing to a drm_irq_busid structure | |
171 | * @file_priv: DRM file private. | |
eaaf8f0f DV |
172 | * |
173 | * Finds the PCI device with the specified bus id and gets its IRQ number. | |
174 | * This IOCTL is deprecated, and will now return EINVAL for any busid not equal | |
175 | * to that of the device that this DRM instance attached to. | |
c6a1af8a TR |
176 | * |
177 | * Return: 0 on success or a negative error code on failure. | |
eaaf8f0f DV |
178 | */ |
179 | int drm_irq_by_busid(struct drm_device *dev, void *data, | |
180 | struct drm_file *file_priv) | |
181 | { | |
182 | struct drm_irq_busid *p = data; | |
183 | ||
fa538645 | 184 | if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
eaaf8f0f DV |
185 | return -EINVAL; |
186 | ||
187 | /* UMS was only ever support on PCI devices. */ | |
188 | if (WARN_ON(!dev->pdev)) | |
189 | return -EINVAL; | |
190 | ||
191 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) | |
192 | return -EINVAL; | |
193 | ||
194 | return drm_pci_irq_by_busid(dev, p); | |
195 | } | |
196 | ||
8da79ccd | 197 | static void drm_pci_agp_init(struct drm_device *dev) |
8410ea3b | 198 | { |
d9906753 | 199 | if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { |
2ce0264d | 200 | if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP)) |
8410ea3b | 201 | dev->agp = drm_agp_init(dev); |
28185647 DV |
202 | if (dev->agp) { |
203 | dev->agp->agp_mtrr = arch_phys_wc_add( | |
204 | dev->agp->agp_info.aper_base, | |
205 | dev->agp->agp_info.aper_size * | |
206 | 1024 * 1024); | |
8410ea3b DA |
207 | } |
208 | } | |
8410ea3b DA |
209 | } |
210 | ||
4efafebe | 211 | void drm_pci_agp_destroy(struct drm_device *dev) |
28ec711c | 212 | { |
d9906753 | 213 | if (dev->agp) { |
28185647 | 214 | arch_phys_wc_del(dev->agp->agp_mtrr); |
366884b1 | 215 | drm_legacy_agp_clear(dev); |
d6e4b28b | 216 | kfree(dev->agp); |
28ec711c DH |
217 | dev->agp = NULL; |
218 | } | |
219 | } | |
220 | ||
dcdb1674 | 221 | /** |
c6a1af8a TR |
222 | * drm_get_pci_dev - Register a PCI device with the DRM subsystem |
223 | * @pdev: PCI device | |
224 | * @ent: entry from the PCI ID table that matches @pdev | |
225 | * @driver: DRM device driver | |
dcdb1674 JC |
226 | * |
227 | * Attempt to gets inter module "drm" information. If we are first | |
228 | * then register the character device and inter module information. | |
229 | * Try and register, if we fail to register, backout previous work. | |
c6a1af8a | 230 | * |
6e3f797c | 231 | * NOTE: This function is deprecated, please use drm_dev_alloc() and |
ef40cbf9 | 232 | * drm_dev_register() instead and remove your &drm_driver.load callback. |
6e3f797c | 233 | * |
c6a1af8a | 234 | * Return: 0 on success or a negative error code on failure. |
dcdb1674 JC |
235 | */ |
236 | int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent, | |
237 | struct drm_driver *driver) | |
238 | { | |
239 | struct drm_device *dev; | |
240 | int ret; | |
241 | ||
242 | DRM_DEBUG("\n"); | |
243 | ||
1bb72532 | 244 | dev = drm_dev_alloc(driver, &pdev->dev); |
0f288605 TG |
245 | if (IS_ERR(dev)) |
246 | return PTR_ERR(dev); | |
dcdb1674 JC |
247 | |
248 | ret = pci_enable_device(pdev); | |
249 | if (ret) | |
c22f0ace | 250 | goto err_free; |
dcdb1674 | 251 | |
dcdb1674 | 252 | dev->pdev = pdev; |
dcdb1674 JC |
253 | #ifdef __alpha__ |
254 | dev->hose = pdev->sysdata; | |
255 | #endif | |
256 | ||
c22f0ace | 257 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
dcdb1674 | 258 | pci_set_drvdata(pdev, dev); |
1793126f | 259 | |
2c695fa0 | 260 | drm_pci_agp_init(dev); |
2c695fa0 | 261 | |
c22f0ace DH |
262 | ret = drm_dev_register(dev, ent->driver_data); |
263 | if (ret) | |
2c695fa0 | 264 | goto err_agp; |
dcdb1674 | 265 | |
b3f2333d DV |
266 | /* No locking needed since shadow-attach is single-threaded since it may |
267 | * only be called from the per-driver module init hook. */ | |
fa538645 | 268 | if (drm_core_check_feature(dev, DRIVER_LEGACY)) |
b3f2333d DV |
269 | list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list); |
270 | ||
dcdb1674 JC |
271 | return 0; |
272 | ||
2c695fa0 | 273 | err_agp: |
2c695fa0 | 274 | drm_pci_agp_destroy(dev); |
dcdb1674 | 275 | pci_disable_device(pdev); |
c22f0ace | 276 | err_free: |
099d1c29 | 277 | drm_dev_unref(dev); |
dcdb1674 JC |
278 | return ret; |
279 | } | |
280 | EXPORT_SYMBOL(drm_get_pci_dev); | |
281 | ||
282 | /** | |
c6a1af8a TR |
283 | * drm_pci_init - Register matching PCI devices with the DRM subsystem |
284 | * @driver: DRM device driver | |
285 | * @pdriver: PCI device driver | |
dcdb1674 | 286 | * |
c6a1af8a TR |
287 | * Initializes a drm_device structures, registering the stubs and initializing |
288 | * the AGP device. | |
dcdb1674 | 289 | * |
6e3f797c DV |
290 | * NOTE: This function is deprecated. Modern modesetting drm drivers should use |
291 | * pci_register_driver() directly, this function only provides shadow-binding | |
292 | * support for old legacy drivers on top of that core pci function. | |
293 | * | |
c6a1af8a | 294 | * Return: 0 on success or a negative error code on failure. |
dcdb1674 | 295 | */ |
8410ea3b | 296 | int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) |
dcdb1674 JC |
297 | { |
298 | struct pci_dev *pdev = NULL; | |
299 | const struct pci_device_id *pid; | |
300 | int i; | |
301 | ||
8410ea3b DA |
302 | DRM_DEBUG("\n"); |
303 | ||
fa538645 | 304 | if (!(driver->driver_features & DRIVER_LEGACY)) |
8410ea3b | 305 | return pci_register_driver(pdriver); |
dcdb1674 JC |
306 | |
307 | /* If not using KMS, fall back to stealth mode manual scanning. */ | |
b3f2333d | 308 | INIT_LIST_HEAD(&driver->legacy_dev_list); |
8410ea3b DA |
309 | for (i = 0; pdriver->id_table[i].vendor != 0; i++) { |
310 | pid = &pdriver->id_table[i]; | |
dcdb1674 JC |
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 | } | |
332 | ||
f4297784 DA |
333 | int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask) |
334 | { | |
335 | struct pci_dev *root; | |
dd66cc2e | 336 | u32 lnkcap, lnkcap2; |
f4297784 DA |
337 | |
338 | *mask = 0; | |
339 | if (!dev->pdev) | |
340 | return -EINVAL; | |
341 | ||
f4297784 DA |
342 | root = dev->pdev->bus->self; |
343 | ||
f4297784 DA |
344 | /* we've been informed via and serverworks don't make the cut */ |
345 | if (root->vendor == PCI_VENDOR_ID_VIA || | |
346 | root->vendor == PCI_VENDOR_ID_SERVERWORKS) | |
347 | return -EINVAL; | |
348 | ||
dd66cc2e BH |
349 | pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap); |
350 | pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2); | |
f4297784 | 351 | |
dd66cc2e | 352 | if (lnkcap2) { /* PCIe r3.0-compliant */ |
f4297784 DA |
353 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB) |
354 | *mask |= DRM_PCIE_SPEED_25; | |
355 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB) | |
356 | *mask |= DRM_PCIE_SPEED_50; | |
357 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB) | |
358 | *mask |= DRM_PCIE_SPEED_80; | |
dd66cc2e | 359 | } else { /* pre-r3.0 */ |
9fe0423e | 360 | if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB) |
f4297784 | 361 | *mask |= DRM_PCIE_SPEED_25; |
9fe0423e | 362 | if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB) |
f8acf6f4 | 363 | *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50); |
f4297784 DA |
364 | } |
365 | ||
366 | DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2); | |
367 | return 0; | |
368 | } | |
369 | EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask); | |
93711d8b | 370 | |
60d8edd4 AD |
371 | int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw) |
372 | { | |
373 | struct pci_dev *root; | |
374 | u32 lnkcap; | |
375 | ||
376 | *mlw = 0; | |
377 | if (!dev->pdev) | |
378 | return -EINVAL; | |
379 | ||
380 | root = dev->pdev->bus->self; | |
381 | ||
382 | pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap); | |
383 | ||
384 | *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4; | |
385 | ||
386 | DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap); | |
387 | return 0; | |
388 | } | |
389 | EXPORT_SYMBOL(drm_pcie_get_max_link_width); | |
390 | ||
93711d8b BH |
391 | #else |
392 | ||
393 | int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) | |
394 | { | |
395 | return -1; | |
396 | } | |
397 | ||
4efafebe | 398 | void drm_pci_agp_destroy(struct drm_device *dev) {} |
eaaf8f0f DV |
399 | |
400 | int drm_irq_by_busid(struct drm_device *dev, void *data, | |
401 | struct drm_file *file_priv) | |
402 | { | |
403 | return -EINVAL; | |
404 | } | |
93711d8b BH |
405 | #endif |
406 | ||
407 | EXPORT_SYMBOL(drm_pci_init); | |
408 | ||
c6a1af8a TR |
409 | /** |
410 | * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem | |
411 | * @driver: DRM device driver | |
412 | * @pdriver: PCI device driver | |
413 | * | |
414 | * Unregisters one or more devices matched by a PCI driver from the DRM | |
415 | * subsystem. | |
6e3f797c DV |
416 | * |
417 | * NOTE: This function is deprecated. Modern modesetting drm drivers should use | |
418 | * pci_unregister_driver() directly, this function only provides shadow-binding | |
419 | * support for old legacy drivers on top of that core pci function. | |
c6a1af8a | 420 | */ |
93711d8b BH |
421 | void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver) |
422 | { | |
423 | struct drm_device *dev, *tmp; | |
424 | DRM_DEBUG("\n"); | |
425 | ||
fa538645 | 426 | if (!(driver->driver_features & DRIVER_LEGACY)) { |
93711d8b BH |
427 | pci_unregister_driver(pdriver); |
428 | } else { | |
b3f2333d DV |
429 | list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list, |
430 | legacy_dev_list) { | |
b3f2333d | 431 | list_del(&dev->legacy_dev_list); |
c94adc4a | 432 | drm_put_dev(dev); |
b3f2333d | 433 | } |
93711d8b BH |
434 | } |
435 | DRM_INFO("Module unloaded\n"); | |
436 | } | |
437 | EXPORT_SYMBOL(drm_pci_exit); |