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>
29 #include <drm/drm_pci.h>
31 #include "drm_internal.h"
32 #include "drm_legacy.h"
35 * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
37 * @size: size of block to allocate
38 * @align: alignment of block
40 * FIXME: This is a needless abstraction of the Linux dma-api and should be
43 * Return: A handle to the allocated memory block on success or NULL on
46 drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
48 drm_dma_handle_t *dmah;
52 /* pci_alloc_consistent only guarantees alignment to the smallest
53 * PAGE_SIZE order which is greater than or equal to the requested size.
54 * Return NULL here for now to make sure nobody tries for larger alignment
59 dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
64 dmah->vaddr = dma_zalloc_coherent(&dev->pdev->dev, size, &dmah->busaddr,
65 GFP_KERNEL | __GFP_COMP);
67 if (dmah->vaddr == NULL) {
72 /* XXX - Is virt_to_page() legal for consistent mem? */
74 for (addr = (unsigned long)dmah->vaddr, sz = size;
75 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
76 SetPageReserved(virt_to_page((void *)addr));
82 EXPORT_SYMBOL(drm_pci_alloc);
85 * Free a PCI consistent memory block without freeing its descriptor.
87 * This function is for internal use in the Linux-specific DRM core code.
89 void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
95 /* XXX - Is virt_to_page() legal for consistent mem? */
97 for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
98 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
99 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 * FIXME: This is a needless abstraction of the Linux dma-api and should be
114 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
116 __drm_legacy_pci_free(dev, dmah);
120 EXPORT_SYMBOL(drm_pci_free);
124 static int drm_get_pci_domain(struct drm_device *dev)
127 /* For historical reasons, drm_get_pci_domain() is busticated
128 * on most archs and has to remain so for userspace interface
129 * < 1.4, except on alpha which was right from the beginning
131 if (dev->if_version < 0x10004)
133 #endif /* __alpha__ */
135 return pci_domain_nr(dev->pdev->bus);
138 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
140 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
141 drm_get_pci_domain(dev),
142 dev->pdev->bus->number,
143 PCI_SLOT(dev->pdev->devfn),
144 PCI_FUNC(dev->pdev->devfn));
148 master->unique_len = strlen(master->unique);
152 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
154 if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
155 (p->busnum & 0xff) != dev->pdev->bus->number ||
156 p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
159 p->irq = dev->pdev->irq;
161 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
167 * drm_irq_by_busid - Get interrupt from bus ID
169 * @data: IOCTL parameter pointing to a drm_irq_busid structure
170 * @file_priv: DRM file private.
172 * Finds the PCI device with the specified bus id and gets its IRQ number.
173 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
174 * to that of the device that this DRM instance attached to.
176 * Return: 0 on success or a negative error code on failure.
178 int drm_irq_by_busid(struct drm_device *dev, void *data,
179 struct drm_file *file_priv)
181 struct drm_irq_busid *p = data;
183 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
186 /* UMS was only ever support on PCI devices. */
187 if (WARN_ON(!dev->pdev))
190 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
193 return drm_pci_irq_by_busid(dev, p);
196 static void drm_pci_agp_init(struct drm_device *dev)
198 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
199 if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
200 dev->agp = drm_agp_init(dev);
202 dev->agp->agp_mtrr = arch_phys_wc_add(
203 dev->agp->agp_info.aper_base,
204 dev->agp->agp_info.aper_size *
210 void drm_pci_agp_destroy(struct drm_device *dev)
213 arch_phys_wc_del(dev->agp->agp_mtrr);
214 drm_legacy_agp_clear(dev);
221 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
223 * @ent: entry from the PCI ID table that matches @pdev
224 * @driver: DRM device driver
226 * Attempt to gets inter module "drm" information. If we are first
227 * then register the character device and inter module information.
228 * Try and register, if we fail to register, backout previous work.
230 * NOTE: This function is deprecated, please use drm_dev_alloc() and
231 * drm_dev_register() instead and remove your &drm_driver.load callback.
233 * Return: 0 on success or a negative error code on failure.
235 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
236 struct drm_driver *driver)
238 struct drm_device *dev;
243 dev = drm_dev_alloc(driver, &pdev->dev);
247 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);
259 drm_pci_agp_init(dev);
261 ret = drm_dev_register(dev, ent->driver_data);
265 /* No locking needed since shadow-attach is single-threaded since it may
266 * only be called from the per-driver module init hook. */
267 if (drm_core_check_feature(dev, DRIVER_LEGACY))
268 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
273 drm_pci_agp_destroy(dev);
274 pci_disable_device(pdev);
279 EXPORT_SYMBOL(drm_get_pci_dev);
282 * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
283 * @driver: DRM device driver
284 * @pdriver: PCI device driver
286 * This is only used by legacy dri1 drivers and deprecated.
288 * Return: 0 on success or a negative error code on failure.
290 int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
292 struct pci_dev *pdev = NULL;
293 const struct pci_device_id *pid;
298 if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
301 /* If not using KMS, fall back to stealth mode manual scanning. */
302 INIT_LIST_HEAD(&driver->legacy_dev_list);
303 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
304 pid = &pdriver->id_table[i];
306 /* Loop around setting up a DRM device for each PCI device
307 * matching our ID and device class. If we had the internal
308 * function that pci_get_subsys and pci_get_class used, we'd
309 * be able to just pass pid in instead of doing a two-stage
314 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
315 pid->subdevice, pdev)) != NULL) {
316 if ((pdev->class & pid->class_mask) != pid->class)
319 /* stealth mode requires a manual probe */
321 drm_get_pci_dev(pdev, pid, driver);
326 EXPORT_SYMBOL(drm_legacy_pci_init);
330 void drm_pci_agp_destroy(struct drm_device *dev) {}
332 int drm_irq_by_busid(struct drm_device *dev, void *data,
333 struct drm_file *file_priv)
340 * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
341 * @driver: DRM device driver
342 * @pdriver: PCI device driver
344 * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
345 * is deprecated and only used by dri1 drivers.
347 void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
349 struct drm_device *dev, *tmp;
352 if (!(driver->driver_features & DRIVER_LEGACY)) {
355 list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
357 list_del(&dev->legacy_dev_list);
361 DRM_INFO("Module unloaded\n");
363 EXPORT_SYMBOL(drm_legacy_pci_exit);