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/dma-mapping.h>
26 #include <linux/export.h>
27 #include <linux/pci.h>
28 #include <linux/slab.h>
31 #include <drm/drm_agpsupport.h>
32 #include <drm/drm_drv.h>
33 #include <drm/drm_pci.h>
34 #include <drm/drm_print.h>
36 #include "drm_internal.h"
37 #include "drm_legacy.h"
40 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
42 * @size: size of block to allocate
43 * @align: alignment of block
45 * FIXME: This is a needless abstraction of the Linux dma-api and should be
48 * Return: A handle to the allocated memory block on success or NULL on
51 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
53 drm_dma_handle_t *dmah;
55 /* pci_alloc_consistent only guarantees alignment to the smallest
56 * PAGE_SIZE order which is greater than or equal to the requested size.
57 * Return NULL here for now to make sure nobody tries for larger alignment
62 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
67 dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
71 if (dmah->vaddr == NULL) {
78 EXPORT_SYMBOL(drm_pci_alloc);
81 * drm_pci_free - Free a PCI consistent memory block
83 * @dmah: handle to memory block
85 * FIXME: This is a needless abstraction of the Linux dma-api and should be
88 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
90 dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
95 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);
125 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
127 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
128 (p->busnum & 0xff) != dev->pdev->bus->number ||
129 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
132 p->irq = dev->pdev->irq;
134 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
140 * drm_irq_by_busid - Get interrupt from bus ID
142 * @data: IOCTL parameter pointing to a drm_irq_busid structure
143 * @file_priv: DRM file private.
145 * Finds the PCI device with the specified bus id and gets its IRQ number.
146 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
147 * to that of the device that this DRM instance attached to.
149 * Return: 0 on success or a negative error code on failure.
151 int drm_irq_by_busid(struct drm_device *dev, void *data,
152 struct drm_file *file_priv)
154 struct drm_irq_busid *p = data;
156 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
159 /* UMS was only ever support on PCI devices. */
160 if (WARN_ON(!dev->pdev))
163 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
166 return drm_pci_irq_by_busid(dev, p);
169 void drm_pci_agp_destroy(struct drm_device *dev)
172 arch_phys_wc_del(dev->agp->agp_mtrr);
173 drm_legacy_agp_clear(dev);
179 #ifdef CONFIG_DRM_LEGACY
181 static void drm_pci_agp_init(struct drm_device *dev)
183 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
184 if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
185 dev->agp = drm_agp_init(dev);
187 dev->agp->agp_mtrr = arch_phys_wc_add(
188 dev->agp->agp_info.aper_base,
189 dev->agp->agp_info.aper_size *
195 static int drm_get_pci_dev(struct pci_dev *pdev,
196 const struct pci_device_id *ent,
197 struct drm_driver *driver)
199 struct drm_device *dev;
204 dev = drm_dev_alloc(driver, &pdev->dev);
208 ret = pci_enable_device(pdev);
214 dev->hose = pdev->sysdata;
217 if (drm_core_check_feature(dev, DRIVER_MODESET))
218 pci_set_drvdata(pdev, dev);
220 drm_pci_agp_init(dev);
222 ret = drm_dev_register(dev, ent->driver_data);
226 /* No locking needed since shadow-attach is single-threaded since it may
227 * only be called from the per-driver module init hook. */
228 if (drm_core_check_feature(dev, DRIVER_LEGACY))
229 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
234 drm_pci_agp_destroy(dev);
235 pci_disable_device(pdev);
242 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
243 * @driver: DRM device driver
244 * @pdriver: PCI device driver
246 * This is only used by legacy dri1 drivers and deprecated.
248 * Return: 0 on success or a negative error code on failure.
250 int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
252 struct pci_dev *pdev = NULL;
253 const struct pci_device_id *pid;
258 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
261 /* If not using KMS, fall back to stealth mode manual scanning. */
262 INIT_LIST_HEAD(&driver->legacy_dev_list);
263 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
264 pid = &pdriver->id_table[i];
266 /* Loop around setting up a DRM device for each PCI device
267 * matching our ID and device class. If we had the internal
268 * function that pci_get_subsys and pci_get_class used, we'd
269 * be able to just pass pid in instead of doing a two-stage
274 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
275 pid->subdevice, pdev)) != NULL) {
276 if ((pdev->class & pid->class_mask) != pid->class)
279 /* stealth mode requires a manual probe */
281 drm_get_pci_dev(pdev, pid, driver);
286 EXPORT_SYMBOL(drm_legacy_pci_init);
289 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
290 * @driver: DRM device driver
291 * @pdriver: PCI device driver
293 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
294 * is deprecated and only used by dri1 drivers.
296 void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
298 struct drm_device *dev, *tmp;
301 if (!(driver->driver_features & DRIVER_LEGACY)) {
304 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
306 list_del(&dev->legacy_dev_list);
310 DRM_INFO("Module unloaded\n");
312 EXPORT_SYMBOL(drm_legacy_pci_exit);