1 files changed, 0 insertions, 573 deletions

diff --git a/ANDROID_3.4.5/arch/x86/pci/xen.c b/ANDROID_3.4.5/arch/x86/pci/xen.c
deleted file mode 100644
index 56ab7498..00000000
--- a/ANDROID_3.4.5/arch/x86/pci/xen.c
+++ /dev/null
@@ -1,573 +0,0 @@
-/*
- * Xen PCI - handle PCI (INTx) and MSI infrastructure calls for PV, HVM and
- * initial domain support. We also handle the DSDT _PRT callbacks for GSI's
- * used in HVM and initial domain mode (PV does not parse ACPI, so it has no
- * concept of GSIs). Under PV we hook under the pnbbios API for IRQs and
- * 0xcf8 PCI configuration read/write.
- *
- *   Author: Ryan Wilson <hap9@epoch.ncsc.mil>
- *           Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
- *           Stefano Stabellini <stefano.stabellini@eu.citrix.com>
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/acpi.h>
-
-#include <linux/io.h>
-#include <asm/io_apic.h>
-#include <asm/pci_x86.h>
-
-#include <asm/xen/hypervisor.h>
-
-#include <xen/features.h>
-#include <xen/events.h>
-#include <asm/xen/pci.h>
-
-static int xen_pcifront_enable_irq(struct pci_dev *dev)
-{
-	int rc;
-	int share = 1;
-	int pirq;
-	u8 gsi;
-
-	rc = pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &gsi);
-	if (rc < 0) {
-		dev_warn(&dev->dev, "Xen PCI: failed to read interrupt line: %d\n",
-			 rc);
-		return rc;
-	}
-	/* In PV DomU the Xen PCI backend puts the PIRQ in the interrupt line.*/
-	pirq = gsi;
-
-	if (gsi < NR_IRQS_LEGACY)
-		share = 0;
-
-	rc = xen_bind_pirq_gsi_to_irq(gsi, pirq, share, "pcifront");
-	if (rc < 0) {
-		dev_warn(&dev->dev, "Xen PCI: failed to bind GSI%d (PIRQ%d) to IRQ: %d\n",
-			 gsi, pirq, rc);
-		return rc;
-	}
-
-	dev->irq = rc;
-	dev_info(&dev->dev, "Xen PCI mapped GSI%d to IRQ%d\n", gsi, dev->irq);
-	return 0;
-}
-
-#ifdef CONFIG_ACPI
-static int xen_register_pirq(u32 gsi, int gsi_override, int triggering,
-			     bool set_pirq)
-{
-	int rc, pirq = -1, irq = -1;
-	struct physdev_map_pirq map_irq;
-	int shareable = 0;
-	char *name;
-
-	irq = xen_irq_from_gsi(gsi);
-	if (irq > 0)
-		return irq;
-
-	if (set_pirq)
-		pirq = gsi;
-
-	map_irq.domid = DOMID_SELF;
-	map_irq.type = MAP_PIRQ_TYPE_GSI;
-	map_irq.index = gsi;
-	map_irq.pirq = pirq;
-
-	rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
-	if (rc) {
-		printk(KERN_WARNING "xen map irq failed %d\n", rc);
-		return -1;
-	}
-
-	if (triggering == ACPI_EDGE_SENSITIVE) {
-		shareable = 0;
-		name = "ioapic-edge";
-	} else {
-		shareable = 1;
-		name = "ioapic-level";
-	}
-
-	if (gsi_override >= 0)
-		gsi = gsi_override;
-
-	irq = xen_bind_pirq_gsi_to_irq(gsi, map_irq.pirq, shareable, name);
-	if (irq < 0)
-		goto out;
-
-	printk(KERN_DEBUG "xen: --> pirq=%d -> irq=%d (gsi=%d)\n", map_irq.pirq, irq, gsi);
-out:
-	return irq;
-}
-
-static int acpi_register_gsi_xen_hvm(struct device *dev, u32 gsi,
-				     int trigger, int polarity)
-{
-	if (!xen_hvm_domain())
-		return -1;
-
-	return xen_register_pirq(gsi, -1 /* no GSI override */, trigger,
-				 false /* no mapping of GSI to PIRQ */);
-}
-
-#ifdef CONFIG_XEN_DOM0
-static int xen_register_gsi(u32 gsi, int gsi_override, int triggering, int polarity)
-{
-	int rc, irq;
-	struct physdev_setup_gsi setup_gsi;
-
-	if (!xen_pv_domain())
-		return -1;
-
-	printk(KERN_DEBUG "xen: registering gsi %u triggering %d polarity %d\n",
-			gsi, triggering, polarity);
-
-	irq = xen_register_pirq(gsi, gsi_override, triggering, true);
-
-	setup_gsi.gsi = gsi;
-	setup_gsi.triggering = (triggering == ACPI_EDGE_SENSITIVE ? 0 : 1);
-	setup_gsi.polarity = (polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
-
-	rc = HYPERVISOR_physdev_op(PHYSDEVOP_setup_gsi, &setup_gsi);
-	if (rc == -EEXIST)
-		printk(KERN_INFO "Already setup the GSI :%d\n", gsi);
-	else if (rc) {
-		printk(KERN_ERR "Failed to setup GSI :%d, err_code:%d\n",
-				gsi, rc);
-	}
-
-	return irq;
-}
-
-static int acpi_register_gsi_xen(struct device *dev, u32 gsi,
-				 int trigger, int polarity)
-{
-	return xen_register_gsi(gsi, -1 /* no GSI override */, trigger, polarity);
-}
-#endif
-#endif
-
-#if defined(CONFIG_PCI_MSI)
-#include <linux/msi.h>
-#include <asm/msidef.h>
-
-struct xen_pci_frontend_ops *xen_pci_frontend;
-EXPORT_SYMBOL_GPL(xen_pci_frontend);
-
-static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
-	int irq, ret, i;
-	struct msi_desc *msidesc;
-	int *v;
-
-	v = kzalloc(sizeof(int) * max(1, nvec), GFP_KERNEL);
-	if (!v)
-		return -ENOMEM;
-
-	if (type == PCI_CAP_ID_MSIX)
-		ret = xen_pci_frontend_enable_msix(dev, v, nvec);
-	else
-		ret = xen_pci_frontend_enable_msi(dev, v);
-	if (ret)
-		goto error;
-	i = 0;
-	list_for_each_entry(msidesc, &dev->msi_list, list) {
-		irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i], 0,
-					       (type == PCI_CAP_ID_MSIX) ?
-					       "pcifront-msi-x" :
-					       "pcifront-msi",
-						DOMID_SELF);
-		if (irq < 0) {
-			ret = irq;
-			goto free;
-		}
-		i++;
-	}
-	kfree(v);
-	return 0;
-
-error:
-	dev_err(&dev->dev, "Xen PCI frontend has not registered MSI/MSI-X support!\n");
-free:
-	kfree(v);
-	return ret;
-}
-
-#define XEN_PIRQ_MSI_DATA  (MSI_DATA_TRIGGER_EDGE | \
-		MSI_DATA_LEVEL_ASSERT | (3 << 8) | MSI_DATA_VECTOR(0))
-
-static void xen_msi_compose_msg(struct pci_dev *pdev, unsigned int pirq,
-		struct msi_msg *msg)
-{
-	/* We set vector == 0 to tell the hypervisor we don't care about it,
-	 * but we want a pirq setup instead.
-	 * We use the dest_id field to pass the pirq that we want. */
-	msg->address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(pirq);
-	msg->address_lo =
-		MSI_ADDR_BASE_LO |
-		MSI_ADDR_DEST_MODE_PHYSICAL |
-		MSI_ADDR_REDIRECTION_CPU |
-		MSI_ADDR_DEST_ID(pirq);
-
-	msg->data = XEN_PIRQ_MSI_DATA;
-}
-
-static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
-	int irq, pirq;
-	struct msi_desc *msidesc;
-	struct msi_msg msg;
-
-	list_for_each_entry(msidesc, &dev->msi_list, list) {
-		__read_msi_msg(msidesc, &msg);
-		pirq = MSI_ADDR_EXT_DEST_ID(msg.address_hi) |
-			((msg.address_lo >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
-		if (msg.data != XEN_PIRQ_MSI_DATA ||
-		    xen_irq_from_pirq(pirq) < 0) {
-			pirq = xen_allocate_pirq_msi(dev, msidesc);
-			if (pirq < 0) {
-				irq = -ENODEV;
-				goto error;
-			}
-			xen_msi_compose_msg(dev, pirq, &msg);
-			__write_msi_msg(msidesc, &msg);
-			dev_dbg(&dev->dev, "xen: msi bound to pirq=%d\n", pirq);
-		} else {
-			dev_dbg(&dev->dev,
-				"xen: msi already bound to pirq=%d\n", pirq);
-		}
-		irq = xen_bind_pirq_msi_to_irq(dev, msidesc, pirq, 0,
-					       (type == PCI_CAP_ID_MSIX) ?
-					       "msi-x" : "msi",
-					       DOMID_SELF);
-		if (irq < 0)
-			goto error;
-		dev_dbg(&dev->dev,
-			"xen: msi --> pirq=%d --> irq=%d\n", pirq, irq);
-	}
-	return 0;
-
-error:
-	dev_err(&dev->dev,
-		"Xen PCI frontend has not registered MSI/MSI-X support!\n");
-	return irq;
-}
-
-#ifdef CONFIG_XEN_DOM0
-static bool __read_mostly pci_seg_supported = true;
-
-static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
-	int ret = 0;
-	struct msi_desc *msidesc;
-
-	list_for_each_entry(msidesc, &dev->msi_list, list) {
-		struct physdev_map_pirq map_irq;
-		domid_t domid;
-
-		domid = ret = xen_find_device_domain_owner(dev);
-		/* N.B. Casting int's -ENODEV to uint16_t results in 0xFFED,
-		 * hence check ret value for < 0. */
-		if (ret < 0)
-			domid = DOMID_SELF;
-
-		memset(&map_irq, 0, sizeof(map_irq));
-		map_irq.domid = domid;
-		map_irq.type = MAP_PIRQ_TYPE_MSI_SEG;
-		map_irq.index = -1;
-		map_irq.pirq = -1;
-		map_irq.bus = dev->bus->number |
-			      (pci_domain_nr(dev->bus) << 16);
-		map_irq.devfn = dev->devfn;
-
-		if (type == PCI_CAP_ID_MSIX) {
-			int pos;
-			u32 table_offset, bir;
-
-			pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-
-			pci_read_config_dword(dev, pos + PCI_MSIX_TABLE,
-					      &table_offset);
-			bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK);
-
-			map_irq.table_base = pci_resource_start(dev, bir);
-			map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
-		}
-
-		ret = -EINVAL;
-		if (pci_seg_supported)
-			ret = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq,
-						    &map_irq);
-		if (ret == -EINVAL && !pci_domain_nr(dev->bus)) {
-			map_irq.type = MAP_PIRQ_TYPE_MSI;
-			map_irq.index = -1;
-			map_irq.pirq = -1;
-			map_irq.bus = dev->bus->number;
-			ret = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq,
-						    &map_irq);
-			if (ret != -EINVAL)
-				pci_seg_supported = false;
-		}
-		if (ret) {
-			dev_warn(&dev->dev, "xen map irq failed %d for %d domain\n",
-				 ret, domid);
-			goto out;
-		}
-
-		ret = xen_bind_pirq_msi_to_irq(dev, msidesc,
-					       map_irq.pirq, map_irq.index,
-					       (type == PCI_CAP_ID_MSIX) ?
-					       "msi-x" : "msi",
-						domid);
-		if (ret < 0)
-			goto out;
-	}
-	ret = 0;
-out:
-	return ret;
-}
-
-static void xen_initdom_restore_msi_irqs(struct pci_dev *dev, int irq)
-{
-	int ret = 0;
-
-	if (pci_seg_supported) {
-		struct physdev_pci_device restore_ext;
-
-		restore_ext.seg = pci_domain_nr(dev->bus);
-		restore_ext.bus = dev->bus->number;
-		restore_ext.devfn = dev->devfn;
-		ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi_ext,
-					&restore_ext);
-		if (ret == -ENOSYS)
-			pci_seg_supported = false;
-		WARN(ret && ret != -ENOSYS, "restore_msi_ext -> %d\n", ret);
-	}
-	if (!pci_seg_supported) {
-		struct physdev_restore_msi restore;
-
-		restore.bus = dev->bus->number;
-		restore.devfn = dev->devfn;
-		ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi, &restore);
-		WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret);
-	}
-}
-#endif
-
-static void xen_teardown_msi_irqs(struct pci_dev *dev)
-{
-	struct msi_desc *msidesc;
-
-	msidesc = list_entry(dev->msi_list.next, struct msi_desc, list);
-	if (msidesc->msi_attrib.is_msix)
-		xen_pci_frontend_disable_msix(dev);
-	else
-		xen_pci_frontend_disable_msi(dev);
-
-	/* Free the IRQ's and the msidesc using the generic code. */
-	default_teardown_msi_irqs(dev);
-}
-
-static void xen_teardown_msi_irq(unsigned int irq)
-{
-	xen_destroy_irq(irq);
-}
-
-#endif
-
-int __init pci_xen_init(void)
-{
-	if (!xen_pv_domain() || xen_initial_domain())
-		return -ENODEV;
-
-	printk(KERN_INFO "PCI: setting up Xen PCI frontend stub\n");
-
-	pcibios_set_cache_line_size();
-
-	pcibios_enable_irq = xen_pcifront_enable_irq;
-	pcibios_disable_irq = NULL;
-
-#ifdef CONFIG_ACPI
-	/* Keep ACPI out of the picture */
-	acpi_noirq = 1;
-#endif
-
-#ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
-	x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs;
-#endif
-	return 0;
-}
-
-int __init pci_xen_hvm_init(void)
-{
-	if (!xen_have_vector_callback || !xen_feature(XENFEAT_hvm_pirqs))
-		return 0;
-
-#ifdef CONFIG_ACPI
-	/*
-	 * We don't want to change the actual ACPI delivery model,
-	 * just how GSIs get registered.
-	 */
-	__acpi_register_gsi = acpi_register_gsi_xen_hvm;
-#endif
-
-#ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
-#endif
-	return 0;
-}
-
-#ifdef CONFIG_XEN_DOM0
-static __init void xen_setup_acpi_sci(void)
-{
-	int rc;
-	int trigger, polarity;
-	int gsi = acpi_sci_override_gsi;
-	int irq = -1;
-	int gsi_override = -1;
-
-	if (!gsi)
-		return;
-
-	rc = acpi_get_override_irq(gsi, &trigger, &polarity);
-	if (rc) {
-		printk(KERN_WARNING "xen: acpi_get_override_irq failed for acpi"
-				" sci, rc=%d\n", rc);
-		return;
-	}
-	trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
-	polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
-
-	printk(KERN_INFO "xen: sci override: global_irq=%d trigger=%d "
-			"polarity=%d\n", gsi, trigger, polarity);
-
-	/* Before we bind the GSI to a Linux IRQ, check whether
-	 * we need to override it with bus_irq (IRQ) value. Usually for
-	 * IRQs below IRQ_LEGACY_IRQ this holds IRQ == GSI, as so:
-	 *  ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
-	 * but there are oddballs where the IRQ != GSI:
-	 *  ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
-	 * which ends up being: gsi_to_irq[9] == 20
-	 * (which is what acpi_gsi_to_irq ends up calling when starting the
-	 * the ACPI interpreter and keels over since IRQ 9 has not been
-	 * setup as we had setup IRQ 20 for it).
-	 */
-	if (acpi_gsi_to_irq(gsi, &irq) == 0) {
-		/* Use the provided value if it's valid. */
-		if (irq >= 0)
-			gsi_override = irq;
-	}
-
-	gsi = xen_register_gsi(gsi, gsi_override, trigger, polarity);
-	printk(KERN_INFO "xen: acpi sci %d\n", gsi);
-
-	return;
-}
-
-int __init pci_xen_initial_domain(void)
-{
-	int irq;
-
-#ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
-	x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
-#endif
-	xen_setup_acpi_sci();
-	__acpi_register_gsi = acpi_register_gsi_xen;
-	/* Pre-allocate legacy irqs */
-	for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
-		int trigger, polarity;
-
-		if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
-			continue;
-
-		xen_register_pirq(irq, -1 /* no GSI override */,
-			trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE,
-			true /* Map GSI to PIRQ */);
-	}
-	if (0 == nr_ioapics) {
-		for (irq = 0; irq < NR_IRQS_LEGACY; irq++)
-			xen_bind_pirq_gsi_to_irq(irq, irq, 0, "xt-pic");
-	}
-	return 0;
-}
-
-struct xen_device_domain_owner {
-	domid_t domain;
-	struct pci_dev *dev;
-	struct list_head list;
-};
-
-static DEFINE_SPINLOCK(dev_domain_list_spinlock);
-static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list);
-
-static struct xen_device_domain_owner *find_device(struct pci_dev *dev)
-{
-	struct xen_device_domain_owner *owner;
-
-	list_for_each_entry(owner, &dev_domain_list, list) {
-		if (owner->dev == dev)
-			return owner;
-	}
-	return NULL;
-}
-
-int xen_find_device_domain_owner(struct pci_dev *dev)
-{
-	struct xen_device_domain_owner *owner;
-	int domain = -ENODEV;
-
-	spin_lock(&dev_domain_list_spinlock);
-	owner = find_device(dev);
-	if (owner)
-		domain = owner->domain;
-	spin_unlock(&dev_domain_list_spinlock);
-	return domain;
-}
-EXPORT_SYMBOL_GPL(xen_find_device_domain_owner);
-
-int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain)
-{
-	struct xen_device_domain_owner *owner;
-
-	owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL);
-	if (!owner)
-		return -ENODEV;
-
-	spin_lock(&dev_domain_list_spinlock);
-	if (find_device(dev)) {
-		spin_unlock(&dev_domain_list_spinlock);
-		kfree(owner);
-		return -EEXIST;
-	}
-	owner->domain = domain;
-	owner->dev = dev;
-	list_add_tail(&owner->list, &dev_domain_list);
-	spin_unlock(&dev_domain_list_spinlock);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(xen_register_device_domain_owner);
-
-int xen_unregister_device_domain_owner(struct pci_dev *dev)
-{
-	struct xen_device_domain_owner *owner;
-
-	spin_lock(&dev_domain_list_spinlock);
-	owner = find_device(dev);
-	if (!owner) {
-		spin_unlock(&dev_domain_list_spinlock);
-		return -ENODEV;
-	}
-	list_del(&owner->list);
-	spin_unlock(&dev_domain_list_spinlock);
-	kfree(owner);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner);
-#endif