1 files changed, 269 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
new file mode 100644
index 000000000..39d35fc3a
--- /dev/null
+++ b/drivers/gpu/drm/drm_pci.c
@@ -0,0 +1,269 @@
+/*
+ * 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