v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
new file mode 100644
index 0000000..896e42a
--- /dev/null
+++ b/drivers/gpu/drm/drm_pci.c
@@ -0,0 +1,364 @@
+/*
+ * 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/pci.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <drm/drm_pci.h>
+#include <drm/drmP.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;
+ unsigned long addr;
+ size_t sz;
+
+ /* 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 | __GFP_COMP);
+
+ if (dmah->vaddr == NULL) {
+ kfree(dmah);
+ return NULL;
+ }
+
+ memset(dmah->vaddr, 0, size);
+
+ /* XXX - Is virt_to_page() legal for consistent mem? */
+ /* Reserve */
+ for (addr = (unsigned long)dmah->vaddr, sz = size;
+ sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+ SetPageReserved(virt_to_page((void *)addr));
+ }
+
+ 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)
+{
+ unsigned long addr;
+ size_t sz;
+
+ if (dmah->vaddr) {
+ /* XXX - Is virt_to_page() legal for consistent mem? */
+ /* Unreserve */
+ for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
+ sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+ ClearPageReserved(virt_to_page((void *)addr));
+ }
+ 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 -EINVAL;
+
+ /* 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 -EINVAL;
+
+ 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);