Initial import

1 files changed, 455 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..1b1bd42b0
--- /dev/null
+++ b/drivers/gpu/drm/drm_pci.c
@@ -0,0 +1,455 @@
+/*
+ * 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/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
+ *
+ * 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
+ */
+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;
+}
+EXPORT_SYMBOL(drm_pci_set_busid);
+
+int drm_pci_set_unique(struct drm_device *dev,
+		       struct drm_master *master,
+		       struct drm_unique *u)
+{
+	int domain, bus, slot, func, ret;
+
+	master->unique_len = u->unique_len;
+	master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
+	if (!master->unique) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
+		ret = -EFAULT;
+		goto err;
+	}
+
+	master->unique[master->unique_len] = '\0';
+
+	/* Return error if the busid submitted doesn't match the device's actual
+	 * busid.
+	 */
+	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
+	if (ret != 3) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	domain = bus >> 8;
+	bus &= 0xff;
+
+	if ((domain != drm_get_pci_domain(dev)) ||
+	    (bus != dev->pdev->bus->number) ||
+	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
+	    (func != PCI_FUNC(dev->pdev->devfn))) {
+		ret = -EINVAL;
+		goto err;
+	}
+	return 0;
+err:
+	return ret;
+}
+
+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_MODESET))
+		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 (drm_pci_device_is_agp(dev))
+			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_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.
+ *
+ * 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 (!dev)
+		return -ENOMEM;
+
+	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;
+
+	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
+		 driver->name, driver->major, driver->minor, driver->patchlevel,
+		 driver->date, pci_name(pdev), dev->primary->index);
+
+	/* 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_MODESET))
+		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_unref(dev);
+	return ret;
+}
+EXPORT_SYMBOL(drm_get_pci_dev);
+
+/**
+ * drm_pci_init - Register matching PCI devices with the DRM subsystem
+ * @driver: DRM device driver
+ * @pdriver: PCI device driver
+ *
+ * Initializes a drm_device structures, registering the stubs and initializing
+ * the AGP device.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int drm_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 (driver->driver_features & DRIVER_MODESET)
+		return pci_register_driver(pdriver);
+
+	/* 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;
+}
+
+int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
+{
+	struct pci_dev *root;
+	u32 lnkcap, lnkcap2;
+
+	*mask = 0;
+	if (!dev->pdev)
+		return -EINVAL;
+
+	root = dev->pdev->bus->self;
+
+	/* we've been informed via and serverworks don't make the cut */
+	if (root->vendor == PCI_VENDOR_ID_VIA ||
+	    root->vendor == PCI_VENDOR_ID_SERVERWORKS)
+		return -EINVAL;
+
+	pcie_capability_read_dword(root, PCI_EXP_LNKCAP, &lnkcap);
+	pcie_capability_read_dword(root, PCI_EXP_LNKCAP2, &lnkcap2);
+
+	if (lnkcap2) {	/* PCIe r3.0-compliant */
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
+			*mask |= DRM_PCIE_SPEED_25;
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
+			*mask |= DRM_PCIE_SPEED_50;
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
+			*mask |= DRM_PCIE_SPEED_80;
+	} else {	/* pre-r3.0 */
+		if (lnkcap & PCI_EXP_LNKCAP_SLS_2_5GB)
+			*mask |= DRM_PCIE_SPEED_25;
+		if (lnkcap & PCI_EXP_LNKCAP_SLS_5_0GB)
+			*mask |= (DRM_PCIE_SPEED_25 | DRM_PCIE_SPEED_50);
+	}
+
+	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
+	return 0;
+}
+EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);
+
+#else
+
+int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
+{
+	return -1;
+}
+
+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;
+}
+
+int drm_pci_set_unique(struct drm_device *dev,
+		       struct drm_master *master,
+		       struct drm_unique *u)
+{
+	return -EINVAL;
+}
+#endif
+
+EXPORT_SYMBOL(drm_pci_init);
+
+/**
+ * drm_pci_exit - Unregister matching PCI devices from the DRM subsystem
+ * @driver: DRM device driver
+ * @pdriver: PCI device driver
+ *
+ * Unregisters one or more devices matched by a PCI driver from the DRM
+ * subsystem.
+ */
+void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
+{
+	struct drm_device *dev, *tmp;
+	DRM_DEBUG("\n");
+
+	if (driver->driver_features & DRIVER_MODESET) {
+		pci_unregister_driver(pdriver);
+	} 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_pci_exit);