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/dma-mapping.h>
27 #include <linux/export.h>
29 #include "drm_internal.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), M_DRM, M_WAITOK | M_NULLOK);
59 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL);
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) {
73 SetPageReserved(virt_to_page((void *)addr));
80 EXPORT_SYMBOL(drm_pci_alloc);
83 * Free a PCI consistent memory block without freeing its descriptor.
85 * This function is for internal use in the Linux-specific DRM core code.
87 void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
93 /* XXX - Is virt_to_page() legal for consistent mem? */
95 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
96 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
98 ClearPageReserved(virt_to_page((void *)addr));
101 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
107 * drm_pci_free - Free a PCI consistent memory block
109 * @dmah: handle to memory block
111 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
113 __drm_legacy_pci_free(dev, dmah);
117 EXPORT_SYMBOL(drm_pci_free);
121 static int drm_get_pci_domain(struct drm_device *dev)
124 /* For historical reasons, drm_get_pci_domain() is busticated
125 * on most archs and has to remain so for userspace interface
126 * < 1.4, except on alpha which was right from the beginning
128 if (dev->if_version < 0x10004)
130 #endif /* __alpha__ */
133 return pci_domain_nr(dev->pdev->bus);
135 return dev->pci_domain;
139 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
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));
149 master->unique_len = strlen(master->unique);
152 EXPORT_SYMBOL(drm_pci_set_busid);
154 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
156 if ((p->busnum >> 8) != dev->pci_domain ||
157 (p->busnum & 0xff) != dev->pci_bus ||
158 p->devnum != dev->pci_slot || p->funcnum != dev->pci_func)
161 p->irq = dev->pdev->irq;
163 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
170 drm_getpciinfo(struct drm_device *dev, void *data, struct drm_file *file_priv)
172 struct drm_pciinfo *info = data;
175 info->bus = dev->pci_bus;
176 info->dev = PCI_SLOT(dev->pdev->devfn);
177 info->func = PCI_FUNC(dev->pdev->devfn);
178 info->vendor_id = dev->pdev->vendor;
179 info->device_id = dev->pdev->device;
180 info->subvendor_id = dev->pdev->subsystem_vendor;
181 info->subdevice_id = dev->pdev->subsystem_device;
182 info->revision_id = 0;
189 * drm_irq_by_busid - Get interrupt from bus ID
191 * @data: IOCTL parameter pointing to a drm_irq_busid structure
192 * @file_priv: DRM file private.
194 * Finds the PCI device with the specified bus id and gets its IRQ number.
195 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
196 * to that of the device that this DRM instance attached to.
198 * Return: 0 on success or a negative error code on failure.
200 int drm_irq_by_busid(struct drm_device *dev, void *data,
201 struct drm_file *file_priv)
203 struct drm_irq_busid *p = data;
205 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
208 /* UMS was only ever support on PCI devices. */
209 if (WARN_ON(!dev->pdev))
212 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
215 return drm_pci_irq_by_busid(dev, p);
219 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
221 * @ent: entry from the PCI ID table that matches @pdev
222 * @driver: DRM device driver
224 * Attempt to gets inter module "drm" information. If we are first
225 * then register the character device and inter module information.
226 * Try and register, if we fail to register, backout previous work.
228 * NOTE: This function is deprecated, please use drm_dev_alloc() and
229 * drm_dev_register() instead and remove your ->load() callback.
231 * Return: 0 on success or a negative error code on failure.
233 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
234 struct drm_driver *driver)
236 struct drm_device *dev;
241 dev = drm_dev_alloc(driver, &pdev->dev);
246 ret = pci_enable_device(pdev);
253 dev->hose = pdev->sysdata;
256 if (drm_core_check_feature(dev, DRIVER_MODESET))
257 pci_set_drvdata(pdev, dev);
260 drm_pci_agp_init(dev);
263 ret = drm_dev_register(dev, ent->driver_data);
267 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
268 driver->name, driver->major, driver->minor, driver->patchlevel,
269 driver->date, pci_name(pdev), dev->primary->index);
271 /* No locking needed since shadow-attach is single-threaded since it may
272 * only be called from the per-driver module init hook. */
273 if (drm_core_check_feature(dev, DRIVER_LEGACY))
274 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
280 drm_pci_agp_destroy(dev);
281 pci_disable_device(pdev);
287 EXPORT_SYMBOL(drm_get_pci_dev);
290 * drm_pci_init - Register matching PCI devices with the DRM subsystem
291 * @driver: DRM device driver
292 * @pdriver: PCI device driver
294 * Initializes a drm_device structures, registering the stubs and initializing
297 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
298 * pci_register_driver() directly, this function only provides shadow-binding
299 * support for old legacy drivers on top of that core pci function.
301 * Return: 0 on success or a negative error code on failure.
303 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
306 struct pci_dev *pdev = NULL;
307 const struct pci_device_id *pid;
313 if (!(driver->driver_features & DRIVER_LEGACY))
314 return pci_register_driver(pdriver);
317 /* If not using KMS, fall back to stealth mode manual scanning. */
318 INIT_LIST_HEAD(&driver->legacy_dev_list);
319 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
320 pid = &pdriver->id_table[i];
322 /* Loop around setting up a DRM device for each PCI device
323 * matching our ID and device class. If we had the internal
324 * function that pci_get_subsys and pci_get_class used, we'd
325 * be able to just pass pid in instead of doing a two-stage
330 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
331 pid->subdevice, pdev)) != NULL) {
332 if ((pdev->class & pid->class_mask) != pid->class)
335 /* stealth mode requires a manual probe */
337 drm_get_pci_dev(pdev, pid, driver);
344 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
348 u32 lnkcap = 0, lnkcap2 = 0;
354 root = device_get_parent(dev->dev->bsddev);
356 /* we've been informed via and serverworks don't make the cut */
357 if (pci_get_vendor(root) == PCI_VENDOR_ID_VIA ||
358 pci_get_vendor(root) == PCI_VENDOR_ID_SERVERWORKS)
362 pci_find_extcap(root, PCIY_EXPRESS, &pos);
366 lnkcap = pci_read_config(root, pos + PCIER_LINKCAP, 4);
367 lnkcap2 = pci_read_config(root, pos + PCIER_LINK_CAP2, 4);
369 lnkcap &= PCIEM_LNKCAP_SPEED_MASK;
372 #define PCI_EXP_LNKCAP_SLS_2_5GB PCIEM_LNKCAP_SPEED_2_5
373 #define PCI_EXP_LNKCAP_SLS_5_0GB PCIEM_LNKCAP_SPEED_5
374 #define PCI_EXP_LNKCAP2_SLS_2_5GB 0x02 /* Supported Link Speed 2.5GT/s */
375 #define PCI_EXP_LNKCAP2_SLS_5_0GB 0x04 /* Supported Link Speed 5.0GT/s */
376 #define PCI_EXP_LNKCAP2_SLS_8_0GB 0x08 /* Supported Link Speed 8.0GT/s */
378 if (lnkcap2) { /* PCIe r3.0-compliant */
379 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
380 *mask |= DRM_PCIE_SPEED_25;
381 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
382 *mask |= DRM_PCIE_SPEED_50;
383 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
384 *mask |= DRM_PCIE_SPEED_80;
385 } else { /* pre-r3.0 */
386 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
387 *mask |= DRM_PCIE_SPEED_25;
388 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
389 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
392 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", pci_get_vendor(root), pci_get_device(root), lnkcap, lnkcap2);
395 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
398 pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *dst)
403 if (!pcie_capability_reg_implemented(dev, pos))
406 return pci_read_config_dword(dev, pci_pcie_cap(dev) + pos, dst);
409 int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
411 struct pci_dev *root;
418 root = dev->pdev->bus->self;
420 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
422 *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
424 DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
427 EXPORT_SYMBOL(drm_pcie_get_max_link_width);
432 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
437 void drm_pci_agp_destroy(struct drm_device *dev) {}
439 int drm_irq_by_busid(struct drm_device *dev, void *data,
440 struct drm_file *file_priv)
446 EXPORT_SYMBOL(drm_pci_init);
449 * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
450 * @driver: DRM device driver
451 * @pdriver: PCI device driver
453 * Unregisters one or more devices matched by a PCI driver from the DRM
456 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
457 * pci_unregister_driver() directly, this function only provides shadow-binding
458 * support for old legacy drivers on top of that core pci function.
460 void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
462 struct drm_device *dev, *tmp;
465 if (!(driver->driver_features & DRIVER_LEGACY)) {
466 pci_unregister_driver(pdriver);
468 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
470 list_del(&dev->legacy_dev_list);
476 DRM_INFO("Module unloaded\n");
478 EXPORT_SYMBOL(drm_pci_exit);