270 строки
7.1 KiB
C
270 строки
7.1 KiB
C
/*
|
|
* 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/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <drm/drm.h>
|
|
#include <drm/drm_drv.h>
|
|
#include <drm/drm_print.h>
|
|
|
|
#include "drm_internal.h"
|
|
#include "drm_legacy.h"
|
|
|
|
#ifdef CONFIG_DRM_LEGACY
|
|
/* List of devices hanging off drivers with stealth attach. */
|
|
static LIST_HEAD(legacy_dev_list);
|
|
static DEFINE_MUTEX(legacy_dev_list_lock);
|
|
#endif
|
|
|
|
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(to_pci_dev(dev->dev)->bus);
|
|
}
|
|
|
|
int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev->dev);
|
|
|
|
master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
|
|
drm_get_pci_domain(dev),
|
|
pdev->bus->number,
|
|
PCI_SLOT(pdev->devfn),
|
|
PCI_FUNC(pdev->devfn));
|
|
if (!master->unique)
|
|
return -ENOMEM;
|
|
|
|
master->unique_len = strlen(master->unique);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DRM_LEGACY
|
|
|
|
static int drm_legacy_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(dev->dev);
|
|
|
|
if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
|
|
(p->busnum & 0xff) != pdev->bus->number ||
|
|
p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
|
|
return -EINVAL;
|
|
|
|
p->irq = pdev->irq;
|
|
|
|
DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
|
|
p->irq);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_legacy_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_legacy_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_is_pci(dev->dev)))
|
|
return -EINVAL;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
|
|
return -EOPNOTSUPP;
|
|
|
|
return drm_legacy_pci_irq_by_busid(dev, p);
|
|
}
|
|
|
|
void drm_legacy_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;
|
|
}
|
|
}
|
|
|
|
static void drm_legacy_pci_agp_init(struct drm_device *dev)
|
|
{
|
|
if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
|
|
if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
|
|
dev->agp = drm_legacy_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);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int drm_legacy_get_pci_dev(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent,
|
|
const 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;
|
|
|
|
#ifdef __alpha__
|
|
dev->hose = pdev->sysdata;
|
|
#endif
|
|
|
|
drm_legacy_pci_agp_init(dev);
|
|
|
|
ret = drm_dev_register(dev, ent->driver_data);
|
|
if (ret)
|
|
goto err_agp;
|
|
|
|
if (drm_core_check_feature(dev, DRIVER_LEGACY)) {
|
|
mutex_lock(&legacy_dev_list_lock);
|
|
list_add_tail(&dev->legacy_dev_list, &legacy_dev_list);
|
|
mutex_unlock(&legacy_dev_list_lock);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_agp:
|
|
drm_legacy_pci_agp_destroy(dev);
|
|
pci_disable_device(pdev);
|
|
err_free:
|
|
drm_dev_put(dev);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* 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(const 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. */
|
|
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_legacy_get_pci_dev(pdev, pid, driver);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_legacy_pci_init);
|
|
|
|
/**
|
|
* 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(const 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 {
|
|
mutex_lock(&legacy_dev_list_lock);
|
|
list_for_each_entry_safe(dev, tmp, &legacy_dev_list,
|
|
legacy_dev_list) {
|
|
if (dev->driver == driver) {
|
|
list_del(&dev->legacy_dev_list);
|
|
drm_put_dev(dev);
|
|
}
|
|
}
|
|
mutex_unlock(&legacy_dev_list_lock);
|
|
}
|
|
DRM_INFO("Module unloaded\n");
|
|
}
|
|
EXPORT_SYMBOL(drm_legacy_pci_exit);
|
|
|
|
#endif
|