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>
32 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
34 * @size: size of block to allocate
35 * @align: alignment of block
37 * Return: A handle to the allocated memory block on success or NULL on
40 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
42 drm_dma_handle_t *dmah;
46 /* pci_alloc_consistent only guarantees alignment to the smallest
47 * PAGE_SIZE order which is greater than or equal to the requested size.
48 * Return NULL here for now to make sure nobody tries for larger alignment
53 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
58 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
60 if (dmah->vaddr == NULL) {
65 memset(dmah->vaddr, 0, size);
67 /* XXX - Is virt_to_page() legal for consistent mem? */
69 for (addr = (unsigned long)dmah->vaddr, sz = size;
70 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
71 SetPageReserved(virt_to_page((void *)addr));
77 EXPORT_SYMBOL(drm_pci_alloc);
80 * Free a PCI consistent memory block without freeing its descriptor.
82 * This function is for internal use in the Linux-specific DRM core code.
84 void __drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
90 /* XXX - Is virt_to_page() legal for consistent mem? */
92 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
93 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
94 ClearPageReserved(virt_to_page((void *)addr));
96 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
102 * drm_pci_free - Free a PCI consistent memory block
104 * @dmah: handle to memory block
106 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
108 __drm_pci_free(dev, dmah);
112 EXPORT_SYMBOL(drm_pci_free);
116 static int drm_get_pci_domain(struct drm_device *dev)
119 /* For historical reasons, drm_get_pci_domain() is busticated
120 * on most archs and has to remain so for userspace interface
121 * < 1.4, except on alpha which was right from the beginning
123 if (dev->if_version < 0x10004)
125 #endif /* __alpha__ */
127 return pci_domain_nr(dev->pdev->bus);
130 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
132 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
133 drm_get_pci_domain(dev),
134 dev->pdev->bus->number,
135 PCI_SLOT(dev->pdev->devfn),
136 PCI_FUNC(dev->pdev->devfn));
140 master->unique_len = strlen(master->unique);
143 EXPORT_SYMBOL(drm_pci_set_busid);
145 int drm_pci_set_unique(struct drm_device *dev,
146 struct drm_master *master,
147 struct drm_unique *u)
149 int domain, bus, slot, func, ret;
151 master->unique_len = u->unique_len;
152 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
153 if (!master->unique) {
158 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
163 master->unique[master->unique_len] = '\0';
165 /* Return error if the busid submitted doesn't match the device's actual
168 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
177 if ((domain != drm_get_pci_domain(dev)) ||
178 (bus != dev->pdev->bus->number) ||
179 (slot != PCI_SLOT(dev->pdev->devfn)) ||
180 (func != PCI_FUNC(dev->pdev->devfn))) {
189 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
191 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
192 (p->busnum & 0xff) != dev->pdev->bus->number ||
193 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
196 p->irq = dev->pdev->irq;
198 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
204 * drm_irq_by_busid - Get interrupt from bus ID
206 * @data: IOCTL parameter pointing to a drm_irq_busid structure
207 * @file_priv: DRM file private.
209 * Finds the PCI device with the specified bus id and gets its IRQ number.
210 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
211 * to that of the device that this DRM instance attached to.
213 * Return: 0 on success or a negative error code on failure.
215 int drm_irq_by_busid(struct drm_device *dev, void *data,
216 struct drm_file *file_priv)
218 struct drm_irq_busid *p = data;
220 if (drm_core_check_feature(dev, DRIVER_MODESET))
223 /* UMS was only ever support on PCI devices. */
224 if (WARN_ON(!dev->pdev))
227 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
230 return drm_pci_irq_by_busid(dev, p);
233 static void drm_pci_agp_init(struct drm_device *dev)
235 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
236 if (drm_pci_device_is_agp(dev))
237 dev->agp = drm_agp_init(dev);
239 dev->agp->agp_mtrr = arch_phys_wc_add(
240 dev->agp->agp_info.aper_base,
241 dev->agp->agp_info.aper_size *
247 void drm_pci_agp_destroy(struct drm_device *dev)
250 arch_phys_wc_del(dev->agp->agp_mtrr);
258 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
260 * @ent: entry from the PCI ID table that matches @pdev
261 * @driver: DRM device driver
263 * Attempt to gets inter module "drm" information. If we are first
264 * then register the character device and inter module information.
265 * Try and register, if we fail to register, backout previous work.
267 * Return: 0 on success or a negative error code on failure.
269 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
270 struct drm_driver *driver)
272 struct drm_device *dev;
277 dev = drm_dev_alloc(driver, &pdev->dev);
281 ret = pci_enable_device(pdev);
287 dev->hose = pdev->sysdata;
290 if (drm_core_check_feature(dev, DRIVER_MODESET))
291 pci_set_drvdata(pdev, dev);
293 drm_pci_agp_init(dev);
295 ret = drm_dev_register(dev, ent->driver_data);
299 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
300 driver->name, driver->major, driver->minor, driver->patchlevel,
301 driver->date, pci_name(pdev), dev->primary->index);
303 /* No locking needed since shadow-attach is single-threaded since it may
304 * only be called from the per-driver module init hook. */
305 if (!drm_core_check_feature(dev, DRIVER_MODESET))
306 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
311 drm_pci_agp_destroy(dev);
312 pci_disable_device(pdev);
317 EXPORT_SYMBOL(drm_get_pci_dev);
320 * drm_pci_init - Register matching PCI devices with the DRM subsystem
321 * @driver: DRM device driver
322 * @pdriver: PCI device driver
324 * Initializes a drm_device structures, registering the stubs and initializing
327 * Return: 0 on success or a negative error code on failure.
329 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
331 struct pci_dev *pdev = NULL;
332 const struct pci_device_id *pid;
337 if (driver->driver_features & DRIVER_MODESET)
338 return pci_register_driver(pdriver);
340 /* If not using KMS, fall back to stealth mode manual scanning. */
341 INIT_LIST_HEAD(&driver->legacy_dev_list);
342 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
343 pid = &pdriver->id_table[i];
345 /* Loop around setting up a DRM device for each PCI device
346 * matching our ID and device class. If we had the internal
347 * function that pci_get_subsys and pci_get_class used, we'd
348 * be able to just pass pid in instead of doing a two-stage
353 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
354 pid->subdevice, pdev)) != NULL) {
355 if ((pdev->class & pid->class_mask) != pid->class)
358 /* stealth mode requires a manual probe */
360 drm_get_pci_dev(pdev, pid, driver);
366 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
368 struct pci_dev *root;
375 root = dev->pdev->bus->self;
377 /* we've been informed via and serverworks don't make the cut */
378 if (root->vendor == PCI_VENDOR_ID_VIA ||
379 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
382 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
383 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
385 if (lnkcap2) { /* PCIe r3.0-compliant */
386 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
387 *mask |= DRM_PCIE_SPEED_25;
388 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
389 *mask |= DRM_PCIE_SPEED_50;
390 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
391 *mask |= DRM_PCIE_SPEED_80;
392 } else { /* pre-r3.0 */
393 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
394 *mask |= DRM_PCIE_SPEED_25;
395 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
396 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
399 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
402 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
406 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
411 void drm_pci_agp_destroy(struct drm_device *dev) {}
413 int drm_irq_by_busid(struct drm_device *dev, void *data,
414 struct drm_file *file_priv)
419 int drm_pci_set_unique(struct drm_device *dev,
420 struct drm_master *master,
421 struct drm_unique *u)
427 EXPORT_SYMBOL(drm_pci_init);
430 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
431 * @driver: DRM device driver
432 * @pdriver: PCI device driver
434 * Unregisters one or more devices matched by a PCI driver from the DRM
437 void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
439 struct drm_device *dev, *tmp;
442 if (driver->driver_features & DRIVER_MODESET) {
443 pci_unregister_driver(pdriver);
445 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
447 list_del(&dev->legacy_dev_list);
451 DRM_INFO("Module unloaded\n");
453 EXPORT_SYMBOL(drm_pci_exit);