2 * Copyright 2003 José Fonseca.
3 * Copyright 2003 Leif Delgass.
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:
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
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.
25 #include <linux/pci.h>
26 #include <linux/slab.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/export.h>
30 #include "drm_legacy.h"
33 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
35 * @size: size of block to allocate
36 * @align: alignment of block
38 * Return: A handle to the allocated memory block on success or NULL on
41 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
43 drm_dma_handle_t *dmah;
47 /* pci_alloc_consistent only guarantees alignment to the smallest
48 * PAGE_SIZE order which is greater than or equal to the requested size.
49 * Return NULL here for now to make sure nobody tries for larger alignment
54 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
59 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
61 if (dmah->vaddr == NULL) {
66 memset(dmah->vaddr, 0, size);
68 /* XXX - Is virt_to_page() legal for consistent mem? */
70 for (addr = (unsigned long)dmah->vaddr, sz = size;
71 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
72 SetPageReserved(virt_to_page((void *)addr));
78 EXPORT_SYMBOL(drm_pci_alloc);
81 * Free a PCI consistent memory block without freeing its descriptor.
83 * This function is for internal use in the Linux-specific DRM core code.
85 void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
91 /* XXX - Is virt_to_page() legal for consistent mem? */
93 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
94 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
95 ClearPageReserved(virt_to_page((void *)addr));
97 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
103 * drm_pci_free - Free a PCI consistent memory block
105 * @dmah: handle to memory block
107 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
109 __drm_legacy_pci_free(dev, dmah);
113 EXPORT_SYMBOL(drm_pci_free);
117 static int drm_get_pci_domain(struct drm_device *dev)
120 /* For historical reasons, drm_get_pci_domain() is busticated
121 * on most archs and has to remain so for userspace interface
122 * < 1.4, except on alpha which was right from the beginning
124 if (dev->if_version < 0x10004)
126 #endif /* __alpha__ */
128 return pci_domain_nr(dev->pdev->bus);
131 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
133 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
134 drm_get_pci_domain(dev),
135 dev->pdev->bus->number,
136 PCI_SLOT(dev->pdev->devfn),
137 PCI_FUNC(dev->pdev->devfn));
141 master->unique_len = strlen(master->unique);
144 EXPORT_SYMBOL(drm_pci_set_busid);
146 int drm_pci_set_unique(struct drm_device *dev,
147 struct drm_master *master,
148 struct drm_unique *u)
150 int domain, bus, slot, func, ret;
152 master->unique_len = u->unique_len;
153 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
154 if (!master->unique) {
159 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
164 master->unique[master->unique_len] = '\0';
166 /* Return error if the busid submitted doesn't match the device's actual
169 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
178 if ((domain != drm_get_pci_domain(dev)) ||
179 (bus != dev->pdev->bus->number) ||
180 (slot != PCI_SLOT(dev->pdev->devfn)) ||
181 (func != PCI_FUNC(dev->pdev->devfn))) {
190 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
192 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
193 (p->busnum & 0xff) != dev->pdev->bus->number ||
194 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
197 p->irq = dev->pdev->irq;
199 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
205 * drm_irq_by_busid - Get interrupt from bus ID
207 * @data: IOCTL parameter pointing to a drm_irq_busid structure
208 * @file_priv: DRM file private.
210 * Finds the PCI device with the specified bus id and gets its IRQ number.
211 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
212 * to that of the device that this DRM instance attached to.
214 * Return: 0 on success or a negative error code on failure.
216 int drm_irq_by_busid(struct drm_device *dev, void *data,
217 struct drm_file *file_priv)
219 struct drm_irq_busid *p = data;
221 if (drm_core_check_feature(dev, DRIVER_MODESET))
224 /* UMS was only ever support on PCI devices. */
225 if (WARN_ON(!dev->pdev))
228 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
231 return drm_pci_irq_by_busid(dev, p);
234 static void drm_pci_agp_init(struct drm_device *dev)
236 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
237 if (drm_pci_device_is_agp(dev))
238 dev->agp = drm_agp_init(dev);
240 dev->agp->agp_mtrr = arch_phys_wc_add(
241 dev->agp->agp_info.aper_base,
242 dev->agp->agp_info.aper_size *
248 void drm_pci_agp_destroy(struct drm_device *dev)
251 arch_phys_wc_del(dev->agp->agp_mtrr);
259 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
261 * @ent: entry from the PCI ID table that matches @pdev
262 * @driver: DRM device driver
264 * Attempt to gets inter module "drm" information. If we are first
265 * then register the character device and inter module information.
266 * Try and register, if we fail to register, backout previous work.
268 * Return: 0 on success or a negative error code on failure.
270 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
271 struct drm_driver *driver)
273 struct drm_device *dev;
278 dev = drm_dev_alloc(driver, &pdev->dev);
282 ret = pci_enable_device(pdev);
288 dev->hose = pdev->sysdata;
291 if (drm_core_check_feature(dev, DRIVER_MODESET))
292 pci_set_drvdata(pdev, dev);
294 drm_pci_agp_init(dev);
296 ret = drm_dev_register(dev, ent->driver_data);
300 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
301 driver->name, driver->major, driver->minor, driver->patchlevel,
302 driver->date, pci_name(pdev), dev->primary->index);
304 /* No locking needed since shadow-attach is single-threaded since it may
305 * only be called from the per-driver module init hook. */
306 if (!drm_core_check_feature(dev, DRIVER_MODESET))
307 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
312 drm_pci_agp_destroy(dev);
313 pci_disable_device(pdev);
318 EXPORT_SYMBOL(drm_get_pci_dev);
321 * drm_pci_init - Register matching PCI devices with the DRM subsystem
322 * @driver: DRM device driver
323 * @pdriver: PCI device driver
325 * Initializes a drm_device structures, registering the stubs and initializing
328 * Return: 0 on success or a negative error code on failure.
330 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
332 struct pci_dev *pdev = NULL;
333 const struct pci_device_id *pid;
338 if (driver->driver_features & DRIVER_MODESET)
339 return pci_register_driver(pdriver);
341 /* If not using KMS, fall back to stealth mode manual scanning. */
342 INIT_LIST_HEAD(&driver->legacy_dev_list);
343 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
344 pid = &pdriver->id_table[i];
346 /* Loop around setting up a DRM device for each PCI device
347 * matching our ID and device class. If we had the internal
348 * function that pci_get_subsys and pci_get_class used, we'd
349 * be able to just pass pid in instead of doing a two-stage
354 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
355 pid->subdevice, pdev)) != NULL) {
356 if ((pdev->class & pid->class_mask) != pid->class)
359 /* stealth mode requires a manual probe */
361 drm_get_pci_dev(pdev, pid, driver);
367 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
369 struct pci_dev *root;
376 root = dev->pdev->bus->self;
378 /* we've been informed via and serverworks don't make the cut */
379 if (root->vendor == PCI_VENDOR_ID_VIA ||
380 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
383 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
384 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
386 if (lnkcap2) { /* PCIe r3.0-compliant */
387 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
388 *mask |= DRM_PCIE_SPEED_25;
389 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
390 *mask |= DRM_PCIE_SPEED_50;
391 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
392 *mask |= DRM_PCIE_SPEED_80;
393 } else { /* pre-r3.0 */
394 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
395 *mask |= DRM_PCIE_SPEED_25;
396 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
397 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
400 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
403 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
407 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
412 void drm_pci_agp_destroy(struct drm_device *dev) {}
414 int drm_irq_by_busid(struct drm_device *dev, void *data,
415 struct drm_file *file_priv)
420 int drm_pci_set_unique(struct drm_device *dev,
421 struct drm_master *master,
422 struct drm_unique *u)
428 EXPORT_SYMBOL(drm_pci_init);
431 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
432 * @driver: DRM device driver
433 * @pdriver: PCI device driver
435 * Unregisters one or more devices matched by a PCI driver from the DRM
438 void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
440 struct drm_device *dev, *tmp;
443 if (driver->driver_features & DRIVER_MODESET) {
444 pci_unregister_driver(pdriver);
446 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
448 list_del(&dev->legacy_dev_list);
452 DRM_INFO("Module unloaded\n");
454 EXPORT_SYMBOL(drm_pci_exit);