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 int drm_pci_set_unique(struct drm_device *dev,
155 struct drm_master *master,
156 struct drm_unique *u)
158 int domain, bus, slot, func, ret;
160 master->unique_len = u->unique_len;
161 master->unique = kmalloc(master->unique_len + 1, M_DRM, M_NOWAIT);
162 if (!master->unique) {
167 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
172 master->unique[master->unique_len] = '\0';
174 /* Return error if the busid submitted doesn't match the device's actual
177 ret = ksscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
186 if ((domain != drm_get_pci_domain(dev)) ||
187 (bus != dev->pdev->bus->number) ||
188 (slot != PCI_SLOT(dev->pdev->devfn)) ||
189 (func != PCI_FUNC(dev->pdev->devfn))) {
198 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
200 if ((p->busnum >> 8) != dev->pci_domain ||
201 (p->busnum & 0xff) != dev->pci_bus ||
202 p->devnum != dev->pci_slot || p->funcnum != dev->pci_func)
205 p->irq = dev->pdev->irq;
207 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
214 drm_getpciinfo(struct drm_device *dev, void *data, struct drm_file *file_priv)
216 struct drm_pciinfo *info = data;
219 info->bus = dev->pci_bus;
220 info->dev = PCI_SLOT(dev->pdev->devfn);
221 info->func = PCI_FUNC(dev->pdev->devfn);
222 info->vendor_id = dev->pdev->vendor;
223 info->device_id = dev->pdev->device;
224 info->subvendor_id = dev->pdev->subsystem_vendor;
225 info->subdevice_id = dev->pdev->subsystem_device;
226 info->revision_id = 0;
233 * drm_irq_by_busid - Get interrupt from bus ID
235 * @data: IOCTL parameter pointing to a drm_irq_busid structure
236 * @file_priv: DRM file private.
238 * Finds the PCI device with the specified bus id and gets its IRQ number.
239 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
240 * to that of the device that this DRM instance attached to.
242 * Return: 0 on success or a negative error code on failure.
244 int drm_irq_by_busid(struct drm_device *dev, void *data,
245 struct drm_file *file_priv)
247 struct drm_irq_busid *p = data;
249 if (drm_core_check_feature(dev, DRIVER_MODESET))
252 /* UMS was only ever support on PCI devices. */
253 if (WARN_ON(!dev->pdev))
256 if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
259 return drm_pci_irq_by_busid(dev, p);
263 * drm_get_pci_dev - Register a PCI device with the DRM subsystem
265 * @ent: entry from the PCI ID table that matches @pdev
266 * @driver: DRM device driver
268 * Attempt to gets inter module "drm" information. If we are first
269 * then register the character device and inter module information.
270 * Try and register, if we fail to register, backout previous work.
272 * NOTE: This function is deprecated, please use drm_dev_alloc() and
273 * drm_dev_register() instead and remove your ->load() callback.
275 * Return: 0 on success or a negative error code on failure.
277 int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
278 struct drm_driver *driver)
280 struct drm_device *dev;
285 dev = drm_dev_alloc(driver, &pdev->dev);
290 ret = pci_enable_device(pdev);
297 dev->hose = pdev->sysdata;
300 if (drm_core_check_feature(dev, DRIVER_MODESET))
301 pci_set_drvdata(pdev, dev);
304 drm_pci_agp_init(dev);
307 ret = drm_dev_register(dev, ent->driver_data);
311 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
312 driver->name, driver->major, driver->minor, driver->patchlevel,
313 driver->date, pci_name(pdev), dev->primary->index);
315 /* No locking needed since shadow-attach is single-threaded since it may
316 * only be called from the per-driver module init hook. */
317 if (!drm_core_check_feature(dev, DRIVER_MODESET))
318 list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
324 drm_pci_agp_destroy(dev);
325 pci_disable_device(pdev);
331 EXPORT_SYMBOL(drm_get_pci_dev);
334 * drm_pci_init - Register matching PCI devices with the DRM subsystem
335 * @driver: DRM device driver
336 * @pdriver: PCI device driver
338 * Initializes a drm_device structures, registering the stubs and initializing
341 * NOTE: This function is deprecated. Modern modesetting drm drivers should use
342 * pci_register_driver() directly, this function only provides shadow-binding
343 * support for old legacy drivers on top of that core pci function.
345 * Return: 0 on success or a negative error code on failure.
347 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
350 struct pci_dev *pdev = NULL;
351 const struct pci_device_id *pid;
357 if (driver->driver_features & DRIVER_MODESET)
358 return pci_register_driver(pdriver);
361 /* If not using KMS, fall back to stealth mode manual scanning. */
362 INIT_LIST_HEAD(&driver->legacy_dev_list);
363 for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
364 pid = &pdriver->id_table[i];
366 /* Loop around setting up a DRM device for each PCI device
367 * matching our ID and device class. If we had the internal
368 * function that pci_get_subsys and pci_get_class used, we'd
369 * be able to just pass pid in instead of doing a two-stage
374 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
375 pid->subdevice, pdev)) != NULL) {
376 if ((pdev->class & pid->class_mask) != pid->class)
379 /* stealth mode requires a manual probe */
381 drm_get_pci_dev(pdev, pid, driver);
388 int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
392 u32 lnkcap = 0, lnkcap2 = 0;
398 root = device_get_parent(dev->dev->bsddev);
400 /* we've been informed via and serverworks don't make the cut */
401 if (pci_get_vendor(root) == PCI_VENDOR_ID_VIA ||
402 pci_get_vendor(root) == PCI_VENDOR_ID_SERVERWORKS)
406 pci_find_extcap(root, PCIY_EXPRESS, &pos);
410 lnkcap = pci_read_config(root, pos + PCIER_LINKCAP, 4);
411 lnkcap2 = pci_read_config(root, pos + PCIER_LINK_CAP2, 4);
413 lnkcap &= PCIEM_LNKCAP_SPEED_MASK;
416 #define PCI_EXP_LNKCAP_SLS_2_5GB PCIEM_LNKCAP_SPEED_2_5
417 #define PCI_EXP_LNKCAP_SLS_5_0GB PCIEM_LNKCAP_SPEED_5
418 #define PCI_EXP_LNKCAP2_SLS_2_5GB 0x02 /* Supported Link Speed 2.5GT/s */
419 #define PCI_EXP_LNKCAP2_SLS_5_0GB 0x04 /* Supported Link Speed 5.0GT/s */
420 #define PCI_EXP_LNKCAP2_SLS_8_0GB 0x08 /* Supported Link Speed 8.0GT/s */
422 if (lnkcap2) { /* PCIe r3.0-compliant */
423 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
424 *mask |= DRM_PCIE_SPEED_25;
425 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
426 *mask |= DRM_PCIE_SPEED_50;
427 if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
428 *mask |= DRM_PCIE_SPEED_80;
429 } else { /* pre-r3.0 */
430 if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
431 *mask |= DRM_PCIE_SPEED_25;
432 if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
433 *mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
436 DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", pci_get_vendor(root), pci_get_device(root), lnkcap, lnkcap2);
439 EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
442 int drm_pcie_get_max_link_width(struct drm_device *dev, u32 *mlw)
444 struct pci_dev *root;
451 root = dev->pdev->bus->self;
453 pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
455 *mlw = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
457 DRM_INFO("probing mlw for device %x:%x = %x\n", root->vendor, root->device, lnkcap);
460 EXPORT_SYMBOL(drm_pcie_get_max_link_width);
466 int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
471 void drm_pci_agp_destroy(struct drm_device *dev) {}
473 int drm_irq_by_busid(struct drm_device *dev, void *data,
474 struct drm_file *file_priv)
479 int drm_pci_set_unique(struct drm_device *dev,
480 struct drm_master *master,
481 struct drm_unique *u)
487 EXPORT_SYMBOL(drm_pci_init);