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_internal.h"
31 #include "drm_legacy.h"
34 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
36 * @size: size of block to allocate
37 * @align: alignment of block
39 * Return: A handle to the allocated memory block on success or NULL on
42 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
44 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);
60 if (dmah->vaddr == NULL) {
68 EXPORT_SYMBOL(drm_pci_alloc);
71 * Free a PCI consistent memory block without freeing its descriptor.
73 * This function is for internal use in the Linux-specific DRM core code.
75 void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
78 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
83 * drm_pci_free - Free a PCI consistent memory block
85 * @dmah: handle to memory block
87 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
89 __drm_legacy_pci_free(dev, dmah);
93 EXPORT_SYMBOL(drm_pci_free);
97 static int drm_get_pci_domain(struct drm_device *dev)
100 /* For historical reasons, drm_get_pci_domain() is busticated
101 * on most archs and has to remain so for userspace interface
102 * < 1.4, except on alpha which was right from the beginning
104 if (dev->if_version < 0x10004)
106 #endif /* __alpha__ */
108 return pci_domain_nr(dev->pdev->bus);
111 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
113 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
114 drm_get_pci_domain(dev),
115 dev->pdev->bus->number,
116 PCI_SLOT(dev->pdev->devfn),
117 PCI_FUNC(dev->pdev->devfn));
121 master->unique_len = strlen(master->unique);
124 EXPORT_SYMBOL(drm_pci_set_busid);
126 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
128 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
129 (p->busnum & 0xff) != dev->pdev->bus->number ||
130 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
133 p->irq = dev->pdev->irq;
135 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
141 * drm_irq_by_busid - Get interrupt from bus ID
143 * @data: IOCTL parameter pointing to a drm_irq_busid structure
144 * @file_priv: DRM file private.
146 * Finds the PCI device with the specified bus id and gets its IRQ number.
147 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
148 * to that of the device that this DRM instance attached to.
150 * Return: 0 on success or a negative error code on failure.
152 int drm_irq_by_busid(struct drm_device *dev, void *data,
153 struct drm_file *file_priv)
155 struct drm_irq_busid *p = data;
157 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
160 /* UMS was only ever support on PCI devices. */
161 if (WARN_ON(!dev->pdev))
164 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
167 return drm_pci_irq_by_busid(dev, p);
170 static void drm_pci_agp_init(struct drm_device *dev)
172 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
173 if (drm_pci_device_is_agp(dev))
174 dev->agp = drm_agp_init(dev);
176 dev->agp->agp_mtrr = arch_phys_wc_add(
177 dev->agp->agp_info.aper_base,
178 dev->agp->agp_info.aper_size *
184 void drm_pci_agp_destroy(struct drm_device *dev)
187 arch_phys_wc_del(dev->agp->agp_mtrr);
188 drm_legacy_agp_clear(dev);
195 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
197 * @ent: entry from the PCI ID table that matches @pdev
198 * @driver: DRM device driver
200 * Attempt to gets inter module "drm" information. If we are first
201 * then register the character device and inter module information.
202 * Try and register, if we fail to register, backout previous work.
204 * NOTE: This function is deprecated, please use drm_dev_alloc() and
205 * drm_dev_register() instead and remove your ->load() callback.
207 * Return: 0 on success or a negative error code on failure.
209 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
210 struct drm_driver *driver)
212 struct drm_device *dev;
217 dev = drm_dev_alloc(driver, &pdev->dev);
221 ret = pci_enable_device(pdev);
227 dev->hose = pdev->sysdata;
230 if (drm_core_check_feature(dev, DRIVER_MODESET))
231 pci_set_drvdata(pdev, dev);
233 drm_pci_agp_init(dev);
235 ret = drm_dev_register(dev, ent->driver_data);
239 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
240 driver->name, driver->major, driver->minor, driver->patchlevel,
241 driver->date, pci_name(pdev), dev->primary->index);
243 /* No locking needed since shadow-attach is single-threaded since it may
244 * only be called from the per-driver module init hook. */
245 if (drm_core_check_feature(dev, DRIVER_LEGACY))
246 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
251 drm_pci_agp_destroy(dev);
252 pci_disable_device(pdev);
257 EXPORT_SYMBOL(drm_get_pci_dev);
260 * drm_pci_init - Register matching PCI devices with the DRM subsystem
261 * @driver: DRM device driver
262 * @pdriver: PCI device driver
264 * Initializes a drm_device structures, registering the stubs and initializing
267 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
268 * pci_register_driver() directly, this function only provides shadow-binding
269 * support for old legacy drivers on top of that core pci function.
271 * Return: 0 on success or a negative error code on failure.
273 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
275 struct pci_dev *pdev = NULL;
276 const struct pci_device_id *pid;
281 if (!(driver->driver_features & DRIVER_LEGACY))
282 return pci_register_driver(pdriver);
284 /* If not using KMS, fall back to stealth mode manual scanning. */
285 INIT_LIST_HEAD(&driver->legacy_dev_list);
286 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
287 pid = &pdriver->id_table[i];
289 /* Loop around setting up a DRM device for each PCI device
290 * matching our ID and device class. If we had the internal
291 * function that pci_get_subsys and pci_get_class used, we'd
292 * be able to just pass pid in instead of doing a two-stage
297 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
298 pid->subdevice, pdev)) != NULL) {
299 if ((pdev->class & pid->class_mask) != pid->class)
302 /* stealth mode requires a manual probe */
304 drm_get_pci_dev(pdev, pid, driver);
310 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
312 struct pci_dev *root;
319 root = dev->pdev->bus->self;
321 /* we've been informed via and serverworks don't make the cut */
322 if (root->vendor == PCI_VENDOR_ID_VIA ||
323 root->vendor == PCI_VENDOR_ID_SERVERWORKS)
326 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
327 pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
329 if (lnkcap2) { /* PCIe r3.0-compliant */
330 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
331 *mask |= DRM_PCIE_SPEED_25;
332 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
333 *mask |= DRM_PCIE_SPEED_50;
334 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
335 *mask |= DRM_PCIE_SPEED_80;
336 } else { /* pre-r3.0 */
337 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
338 *mask |= DRM_PCIE_SPEED_25;
339 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
340 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
343 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
346 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
348 int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
350 struct pci_dev *root;
357 root = dev->pdev->bus->self;
359 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
361 *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
363 DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
366 EXPORT_SYMBOL(drm_pcie_get_max_link_width);
370 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
375 void drm_pci_agp_destroy(struct drm_device *dev) {}
377 int drm_irq_by_busid(struct drm_device *dev, void *data,
378 struct drm_file *file_priv)
384 EXPORT_SYMBOL(drm_pci_init);
387 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
388 * @driver: DRM device driver
389 * @pdriver: PCI device driver
391 * Unregisters one or more devices matched by a PCI driver from the DRM
394 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
395 * pci_unregister_driver() directly, this function only provides shadow-binding
396 * support for old legacy drivers on top of that core pci function.
398 void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
400 struct drm_device *dev, *tmp;
403 if (!(driver->driver_features & DRIVER_LEGACY)) {
404 pci_unregister_driver(pdriver);
406 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
408 list_del(&dev->legacy_dev_list);
412 DRM_INFO("Module unloaded\n");
414 EXPORT_SYMBOL(drm_pci_exit);