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/list.h>
28 #include <linux/mutex.h>
29 #include <linux/pci.h>
30 #include <linux/slab.h>
33 #include <drm/drm_agpsupport.h>
34 #include <drm/drm_drv.h>
35 #include <drm/drm_print.h>
37 #include "drm_internal.h"
38 #include "drm_legacy.h"
40 #ifdef CONFIG_DRM_LEGACY
41 /* List of devices hanging off drivers with stealth attach. */
42 static LIST_HEAD(legacy_dev_list);
43 static DEFINE_MUTEX(legacy_dev_list_lock);
46 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
48 * @size: size of block to allocate
49 * @align: alignment of block
51 * FIXME: This is a needless abstraction of the Linux dma-api and should be
54 * Return: A handle to the allocated memory block on success or NULL on
57 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
59 drm_dma_handle_t *dmah;
61 /* pci_alloc_consistent only guarantees alignment to the smallest
62 * PAGE_SIZE order which is greater than or equal to the requested size.
63 * Return NULL here for now to make sure nobody tries for larger alignment
68 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
73 dmah->vaddr = dma_alloc_coherent(dev->dev, size,
77 if (dmah->vaddr == NULL) {
84 EXPORT_SYMBOL(drm_pci_alloc);
87 * drm_pci_free - Free a PCI consistent memory block
89 * @dmah: handle to memory block
91 * FIXME: This is a needless abstraction of the Linux dma-api and should be
94 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
96 dma_free_coherent(dev->dev, dmah->size, dmah->vaddr,
101 EXPORT_SYMBOL(drm_pci_free);
104 static int drm_get_pci_domain(struct drm_device *dev)
107 /* For historical reasons, drm_get_pci_domain() is busticated
108 * on most archs and has to remain so for userspace interface
109 * < 1.4, except on alpha which was right from the beginning
111 if (dev->if_version < 0x10004)
113 #endif /* __alpha__ */
115 return pci_domain_nr(to_pci_dev(dev->dev)->bus);
118 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
120 struct pci_dev *pdev = to_pci_dev(dev->dev);
122 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
123 drm_get_pci_domain(dev),
125 PCI_SLOT(pdev->devfn),
126 PCI_FUNC(pdev->devfn));
130 master->unique_len = strlen(master->unique);
134 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
136 struct pci_dev *pdev = to_pci_dev(dev->dev);
138 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
139 (p->busnum & 0xff) != pdev->bus->number ||
140 p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
145 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
151 * drm_legacy_irq_by_busid - Get interrupt from bus ID
153 * @data: IOCTL parameter pointing to a drm_irq_busid structure
154 * @file_priv: DRM file private.
156 * Finds the PCI device with the specified bus id and gets its IRQ number.
157 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
158 * to that of the device that this DRM instance attached to.
160 * Return: 0 on success or a negative error code on failure.
162 int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
163 struct drm_file *file_priv)
165 struct drm_irq_busid *p = data;
167 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
170 /* UMS was only ever support on PCI devices. */
171 if (WARN_ON(!dev_is_pci(dev->dev)))
174 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
177 return drm_pci_irq_by_busid(dev, p);
180 void drm_pci_agp_destroy(struct drm_device *dev)
183 arch_phys_wc_del(dev->agp->agp_mtrr);
184 drm_legacy_agp_clear(dev);
190 #ifdef CONFIG_DRM_LEGACY
192 static void drm_pci_agp_init(struct drm_device *dev)
194 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
195 if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
196 dev->agp = drm_agp_init(dev);
198 dev->agp->agp_mtrr = arch_phys_wc_add(
199 dev->agp->agp_info.aper_base,
200 dev->agp->agp_info.aper_size *
206 static int drm_get_pci_dev(struct pci_dev *pdev,
207 const struct pci_device_id *ent,
208 const struct drm_driver *driver)
210 struct drm_device *dev;
215 dev = drm_dev_alloc(driver, &pdev->dev);
219 ret = pci_enable_device(pdev);
225 dev->hose = pdev->sysdata;
228 if (drm_core_check_feature(dev, DRIVER_MODESET))
229 pci_set_drvdata(pdev, dev);
231 drm_pci_agp_init(dev);
233 ret = drm_dev_register(dev, ent->driver_data);
237 if (drm_core_check_feature(dev, DRIVER_LEGACY)) {
238 mutex_lock(&legacy_dev_list_lock);
239 list_add_tail(&dev->legacy_dev_list, &legacy_dev_list);
240 mutex_unlock(&legacy_dev_list_lock);
246 drm_pci_agp_destroy(dev);
247 pci_disable_device(pdev);
254 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
255 * @driver: DRM device driver
256 * @pdriver: PCI device driver
258 * This is only used by legacy dri1 drivers and deprecated.
260 * Return: 0 on success or a negative error code on failure.
262 int drm_legacy_pci_init(const struct drm_driver *driver,
263 struct pci_driver *pdriver)
265 struct pci_dev *pdev = NULL;
266 const struct pci_device_id *pid;
271 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
274 /* If not using KMS, fall back to stealth mode manual scanning. */
275 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
276 pid = &pdriver->id_table[i];
278 /* Loop around setting up a DRM device for each PCI device
279 * matching our ID and device class. If we had the internal
280 * function that pci_get_subsys and pci_get_class used, we'd
281 * be able to just pass pid in instead of doing a two-stage
286 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
287 pid->subdevice, pdev)) != NULL) {
288 if ((pdev->class & pid->class_mask) != pid->class)
291 /* stealth mode requires a manual probe */
293 drm_get_pci_dev(pdev, pid, driver);
298 EXPORT_SYMBOL(drm_legacy_pci_init);
301 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
302 * @driver: DRM device driver
303 * @pdriver: PCI device driver
305 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
306 * is deprecated and only used by dri1 drivers.
308 void drm_legacy_pci_exit(const struct drm_driver *driver,
309 struct pci_driver *pdriver)
311 struct drm_device *dev, *tmp;
315 if (!(driver->driver_features & DRIVER_LEGACY)) {
318 mutex_lock(&legacy_dev_list_lock);
319 list_for_each_entry_safe(dev, tmp, &legacy_dev_list,
321 if (dev->driver == driver) {
322 list_del(&dev->legacy_dev_list);
326 mutex_unlock(&legacy_dev_list_lock);
328 DRM_INFO("Module unloaded\n");
330 EXPORT_SYMBOL(drm_legacy_pci_exit);