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 static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
133 master->unique_len = 40;
134 master->unique_size = master->unique_len;
135 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
136 if (master->unique == NULL)
140 len = snprintf(master->unique, master->unique_len,
141 "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));
147 if (len >= master->unique_len) {
148 DRM_ERROR("buffer overflow");
152 master->unique_len = len;
159 int drm_pci_set_unique(struct drm_device *dev,
160 struct drm_master *master,
161 struct drm_unique *u)
163 int domain, bus, slot, func, ret;
165 master->unique_len = u->unique_len;
166 master->unique_size = u->unique_len + 1;
167 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
168 if (!master->unique) {
173 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
178 master->unique[master->unique_len] = '\0';
180 /* Return error if the busid submitted doesn't match the device's actual
183 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
192 if ((domain != drm_get_pci_domain(dev)) ||
193 (bus != dev->pdev->bus->number) ||
194 (slot != PCI_SLOT(dev->pdev->devfn)) ||
195 (func != PCI_FUNC(dev->pdev->devfn))) {
204 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
206 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
207 (p->busnum & 0xff) != dev->pdev->bus->number ||
208 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
211 p->irq = dev->pdev->irq;
213 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
219 * drm_irq_by_busid - Get interrupt from bus ID
221 * @data: IOCTL parameter pointing to a drm_irq_busid structure
222 * @file_priv: DRM file private.
224 * Finds the PCI device with the specified bus id and gets its IRQ number.
225 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
226 * to that of the device that this DRM instance attached to.
228 * Return: 0 on success or a negative error code on failure.
230 int drm_irq_by_busid(struct drm_device *dev, void *data,
231 struct drm_file *file_priv)
233 struct drm_irq_busid *p = data;
235 if (drm_core_check_feature(dev, DRIVER_MODESET))
238 /* UMS was only ever support on PCI devices. */
239 if (WARN_ON(!dev->pdev))
242 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
245 return drm_pci_irq_by_busid(dev, p);
248 static void drm_pci_agp_init(struct drm_device *dev)
250 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
251 if (drm_pci_device_is_agp(dev))
252 dev->agp = drm_agp_init(dev);
254 dev->agp->agp_mtrr = arch_phys_wc_add(
255 dev->agp->agp_info.aper_base,
256 dev->agp->agp_info.aper_size *
262 void drm_pci_agp_destroy(struct drm_device *dev)
265 arch_phys_wc_del(dev->agp->agp_mtrr);
272 static struct drm_bus drm_pci_bus = {
273 .set_busid = drm_pci_set_busid,
277 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
279 * @ent: entry from the PCI ID table that matches @pdev
280 * @driver: DRM device driver
282 * Attempt to gets inter module "drm" information. If we are first
283 * then register the character device and inter module information.
284 * Try and register, if we fail to register, backout previous work.
286 * Return: 0 on success or a negative error code on failure.
288 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
289 struct drm_driver *driver)
291 struct drm_device *dev;
296 dev = drm_dev_alloc(driver, &pdev->dev);
300 ret = pci_enable_device(pdev);
306 dev->hose = pdev->sysdata;
309 if (drm_core_check_feature(dev, DRIVER_MODESET))
310 pci_set_drvdata(pdev, dev);
312 drm_pci_agp_init(dev);
314 ret = drm_dev_register(dev, ent->driver_data);
318 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
319 driver->name, driver->major, driver->minor, driver->patchlevel,
320 driver->date, pci_name(pdev), dev->primary->index);
322 /* No locking needed since shadow-attach is single-threaded since it may
323 * only be called from the per-driver module init hook. */
324 if (!drm_core_check_feature(dev, DRIVER_MODESET))
325 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
330 drm_pci_agp_destroy(dev);
331 pci_disable_device(pdev);
336 EXPORT_SYMBOL(drm_get_pci_dev);
339 * drm_pci_init - Register matching PCI devices with the DRM subsystem
340 * @driver: DRM device driver
341 * @pdriver: PCI device driver
343 * Initializes a drm_device structures, registering the stubs and initializing
346 * Return: 0 on success or a negative error code on failure.
348 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
350 struct pci_dev *pdev = NULL;
351 const struct pci_device_id *pid;
356 driver->bus = &drm_pci_bus;
358 if (driver->driver_features & DRIVER_MODESET)
359 return pci_register_driver(pdriver);
361 /* If not using KMS, fall back to stealth mode manual scanning. */
362 INIT_LIST_HEAD(&driver->legacy_dev_list);
363 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
364 pid = &pdriver->id_table[i];
366 /* Loop around setting up a DRM device for each PCI device
367 * matching our ID and device class. If we had the internal
368 * function that pci_get_subsys and pci_get_class used, we'd
369 * be able to just pass pid in instead of doing a two-stage
374 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
375 pid->subdevice, pdev)) != NULL) {
376 if ((pdev->class & pid->class_mask) != pid->class)
379 /* stealth mode requires a manual probe */
381 drm_get_pci_dev(pdev, pid, driver);
387 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
389 struct pci_dev *root;
396 root = dev->pdev->bus->self;
398 /* we've been informed via and serverworks don't make the cut */
399 if (root->vendor == PCI_VENDOR_ID_VIA ||
400 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
403 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
404 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
406 if (lnkcap2) { /* PCIe r3.0-compliant */
407 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
408 *mask |= DRM_PCIE_SPEED_25;
409 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
410 *mask |= DRM_PCIE_SPEED_50;
411 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
412 *mask |= DRM_PCIE_SPEED_80;
413 } else { /* pre-r3.0 */
414 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
415 *mask |= DRM_PCIE_SPEED_25;
416 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
417 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
420 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
423 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
427 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
432 void drm_pci_agp_destroy(struct drm_device *dev) {}
434 int drm_irq_by_busid(struct drm_device *dev, void *data,
435 struct drm_file *file_priv)
440 int drm_pci_set_unique(struct drm_device *dev,
441 struct drm_master *master,
442 struct drm_unique *u)
448 EXPORT_SYMBOL(drm_pci_init);
451 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
452 * @driver: DRM device driver
453 * @pdriver: PCI device driver
455 * Unregisters one or more devices matched by a PCI driver from the DRM
458 void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
460 struct drm_device *dev, *tmp;
463 if (driver->driver_features & DRIVER_MODESET) {
464 pci_unregister_driver(pdriver);
466 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
468 list_del(&dev->legacy_dev_list);
472 DRM_INFO("Module unloaded\n");
474 EXPORT_SYMBOL(drm_pci_exit);