| /* |
| * Copyright 2003 José Fonseca. |
| * Copyright 2003 Leif Delgass. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <linux/dma-mapping.h> |
| #include <linux/export.h> |
| #include <linux/pci.h> |
| #include <linux/slab.h> |
| |
| #include <drm/drm.h> |
| #include <drm/drm_agpsupport.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_pci.h> |
| #include <drm/drm_print.h> |
| |
| #include "drm_internal.h" |
| #include "drm_legacy.h" |
| |
| /** |
| * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA. |
| * @dev: DRM device |
| * @size: size of block to allocate |
| * @align: alignment of block |
| * |
| * FIXME: This is a needless abstraction of the Linux dma-api and should be |
| * removed. |
| * |
| * Return: A handle to the allocated memory block on success or NULL on |
| * failure. |
| */ |
| drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) |
| { |
| drm_dma_handle_t *dmah; |
| |
| /* pci_alloc_consistent only guarantees alignment to the smallest |
| * PAGE_SIZE order which is greater than or equal to the requested size. |
| * Return NULL here for now to make sure nobody tries for larger alignment |
| */ |
| if (align > size) |
| return NULL; |
| |
| dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); |
| if (!dmah) |
| return NULL; |
| |
| dmah->size = size; |
| dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, |
| &dmah->busaddr, |
| GFP_KERNEL); |
| |
| if (dmah->vaddr == NULL) { |
| kfree(dmah); |
| return NULL; |
| } |
| |
| return dmah; |
| } |
| |
| EXPORT_SYMBOL(drm_pci_alloc); |
| |
| /* |
| * Free a PCI consistent memory block without freeing its descriptor. |
| * |
| * This function is for internal use in the Linux-specific DRM core code. |
| */ |
| void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
| { |
| if (dmah->vaddr) |
| dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, |
| dmah->busaddr); |
| } |
| |
| /** |
| * drm_pci_free - Free a PCI consistent memory block |
| * @dev: DRM device |
| * @dmah: handle to memory block |
| * |
| * FIXME: This is a needless abstraction of the Linux dma-api and should be |
| * removed. |
| */ |
| void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) |
| { |
| __drm_legacy_pci_free(dev, dmah); |
| kfree(dmah); |
| } |
| |
| EXPORT_SYMBOL(drm_pci_free); |
| |
| #ifdef CONFIG_PCI |
| |
| static int drm_get_pci_domain(struct drm_device *dev) |
| { |
| #ifndef __alpha__ |
| /* For historical reasons, drm_get_pci_domain() is busticated |
| * on most archs and has to remain so for userspace interface |
| * < 1.4, except on alpha which was right from the beginning |
| */ |
| if (dev->if_version < 0x10004) |
| return 0; |
| #endif /* __alpha__ */ |
| |
| return pci_domain_nr(dev->pdev->bus); |
| } |
| |
| int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) |
| { |
| master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d", |
| drm_get_pci_domain(dev), |
| dev->pdev->bus->number, |
| PCI_SLOT(dev->pdev->devfn), |
| PCI_FUNC(dev->pdev->devfn)); |
| if (!master->unique) |
| return -ENOMEM; |
| |
| master->unique_len = strlen(master->unique); |
| return 0; |
| } |
| |
| static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p) |
| { |
| if ((p->busnum >> 8) != drm_get_pci_domain(dev) || |
| (p->busnum & 0xff) != dev->pdev->bus->number || |
| p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn)) |
| return -EINVAL; |
| |
| p->irq = dev->pdev->irq; |
| |
| DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum, |
| p->irq); |
| return 0; |
| } |
| |
| /** |
| * drm_irq_by_busid - Get interrupt from bus ID |
| * @dev: DRM device |
| * @data: IOCTL parameter pointing to a drm_irq_busid structure |
| * @file_priv: DRM file private. |
| * |
| * Finds the PCI device with the specified bus id and gets its IRQ number. |
| * This IOCTL is deprecated, and will now return EINVAL for any busid not equal |
| * to that of the device that this DRM instance attached to. |
| * |
| * Return: 0 on success or a negative error code on failure. |
| */ |
| int drm_irq_by_busid(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_irq_busid *p = data; |
| |
| if (!drm_core_check_feature(dev, DRIVER_LEGACY)) |
| return -EOPNOTSUPP; |
| |
| /* UMS was only ever support on PCI devices. */ |
| if (WARN_ON(!dev->pdev)) |
| return -EINVAL; |
| |
| if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| return -EOPNOTSUPP; |
| |
| return drm_pci_irq_by_busid(dev, p); |
| } |
| |
| static void drm_pci_agp_init(struct drm_device *dev) |
| { |
| if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { |
| if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP)) |
| dev->agp = drm_agp_init(dev); |
| if (dev->agp) { |
| dev->agp->agp_mtrr = arch_phys_wc_add( |
| dev->agp->agp_info.aper_base, |
| dev->agp->agp_info.aper_size * |
| 1024 * 1024); |
| } |
| } |
| } |
| |
| void drm_pci_agp_destroy(struct drm_device *dev) |
| { |
| if (dev->agp) { |
| arch_phys_wc_del(dev->agp->agp_mtrr); |
| drm_legacy_agp_clear(dev); |
| kfree(dev->agp); |
| dev->agp = NULL; |
| } |
| } |
| |
| /** |
| * drm_get_pci_dev - Register a PCI device with the DRM subsystem |
| * @pdev: PCI device |
| * @ent: entry from the PCI ID table that matches @pdev |
| * @driver: DRM device driver |
| * |
| * Attempt to gets inter module "drm" information. If we are first |
| * then register the character device and inter module information. |
| * Try and register, if we fail to register, backout previous work. |
| * |
| * NOTE: This function is deprecated, please use drm_dev_alloc() and |
| * drm_dev_register() instead and remove your &drm_driver.load callback. |
| * |
| * Return: 0 on success or a negative error code on failure. |
| */ |
| int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent, |
| struct drm_driver *driver) |
| { |
| struct drm_device *dev; |
| int ret; |
| |
| DRM_DEBUG("\n"); |
| |
| dev = drm_dev_alloc(driver, &pdev->dev); |
| if (IS_ERR(dev)) |
| return PTR_ERR(dev); |
| |
| ret = pci_enable_device(pdev); |
| if (ret) |
| goto err_free; |
| |
| dev->pdev = pdev; |
| #ifdef __alpha__ |
| dev->hose = pdev->sysdata; |
| #endif |
| |
| if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| pci_set_drvdata(pdev, dev); |
| |
| drm_pci_agp_init(dev); |
| |
| ret = drm_dev_register(dev, ent->driver_data); |
| if (ret) |
| goto err_agp; |
| |
| /* No locking needed since shadow-attach is single-threaded since it may |
| * only be called from the per-driver module init hook. */ |
| if (drm_core_check_feature(dev, DRIVER_LEGACY)) |
| list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list); |
| |
| return 0; |
| |
| err_agp: |
| drm_pci_agp_destroy(dev); |
| pci_disable_device(pdev); |
| err_free: |
| drm_dev_put(dev); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_get_pci_dev); |
| |
| /** |
| * drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver |
| * @driver: DRM device driver |
| * @pdriver: PCI device driver |
| * |
| * This is only used by legacy dri1 drivers and deprecated. |
| * |
| * Return: 0 on success or a negative error code on failure. |
| */ |
| int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver) |
| { |
| struct pci_dev *pdev = NULL; |
| const struct pci_device_id *pid; |
| int i; |
| |
| DRM_DEBUG("\n"); |
| |
| if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY))) |
| return -EINVAL; |
| |
| /* If not using KMS, fall back to stealth mode manual scanning. */ |
| INIT_LIST_HEAD(&driver->legacy_dev_list); |
| for (i = 0; pdriver->id_table[i].vendor != 0; i++) { |
| pid = &pdriver->id_table[i]; |
| |
| /* Loop around setting up a DRM device for each PCI device |
| * matching our ID and device class. If we had the internal |
| * function that pci_get_subsys and pci_get_class used, we'd |
| * be able to just pass pid in instead of doing a two-stage |
| * thing. |
| */ |
| pdev = NULL; |
| while ((pdev = |
| pci_get_subsys(pid->vendor, pid->device, pid->subvendor, |
| pid->subdevice, pdev)) != NULL) { |
| if ((pdev->class & pid->class_mask) != pid->class) |
| continue; |
| |
| /* stealth mode requires a manual probe */ |
| pci_dev_get(pdev); |
| drm_get_pci_dev(pdev, pid, driver); |
| } |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_legacy_pci_init); |
| |
| #else |
| |
| void drm_pci_agp_destroy(struct drm_device *dev) {} |
| |
| int drm_irq_by_busid(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| return -EINVAL; |
| } |
| #endif |
| |
| /** |
| * drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver |
| * @driver: DRM device driver |
| * @pdriver: PCI device driver |
| * |
| * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This |
| * is deprecated and only used by dri1 drivers. |
| */ |
| void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver) |
| { |
| struct drm_device *dev, *tmp; |
| DRM_DEBUG("\n"); |
| |
| if (!(driver->driver_features & DRIVER_LEGACY)) { |
| WARN_ON(1); |
| } else { |
| list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list, |
| legacy_dev_list) { |
| list_del(&dev->legacy_dev_list); |
| drm_put_dev(dev); |
| } |
| } |
| DRM_INFO("Module unloaded\n"); |
| } |
| EXPORT_SYMBOL(drm_legacy_pci_exit); |