Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 510 insertions, 0 deletions

diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
new file mode 100644
index 00000000..b1725398
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -0,0 +1,510 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/sn_sal.h>
+#include "xtalk/hubdev.h"
+#include <linux/acpi.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+
+
+/*
+ * The code in this file will only be executed when running with
+ * a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
+ */
+
+
+/*
+ * This value must match the UUID the PROM uses
+ * (io/acpi/defblk.c) when building a vendor descriptor.
+ */
+struct acpi_vendor_uuid sn_uuid = {
+	.subtype = 0,
+	.data	= { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
+		    0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
+};
+
+struct sn_pcidev_match {
+	u8 bus;
+	unsigned int devfn;
+	acpi_handle handle;
+};
+
+/*
+ * Perform the early IO init in PROM.
+ */
+static long
+sal_ioif_init(u64 *result)
+{
+	struct ia64_sal_retval isrv = {0,0,0,0};
+
+	SAL_CALL_NOLOCK(isrv,
+			SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
+	*result = isrv.v0;
+	return isrv.status;
+}
+
+/*
+ * sn_acpi_hubdev_init() - This function is called by acpi_ns_get_device_callback()
+ *			   for all SGIHUB and SGITIO acpi devices defined in the
+ *			   DSDT. It obtains the hubdev_info pointer from the
+ *			   ACPI vendor resource, which the PROM setup, and sets up the
+ *			   hubdev_info in the pda.
+ */
+
+static acpi_status __init
+sn_acpi_hubdev_init(acpi_handle handle, u32 depth, void *context, void **ret)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	u64 addr;
+	struct hubdev_info *hubdev;
+	struct hubdev_info *hubdev_ptr;
+	int i;
+	u64 nasid;
+	struct acpi_resource *resource;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+	extern void sn_common_hubdev_init(struct hubdev_info *);
+
+	status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR
+		       "sn_acpi_hubdev_init: acpi_get_vendor_resource() "
+		       "(0x%x) failed for: %s\n", status,
+			(char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		return AE_OK;		/* Continue walking namespace */
+	}
+
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	    sizeof(struct hubdev_info *)) {
+		acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR
+		       "sn_acpi_hubdev_init: Invalid vendor data length: "
+		       "%d for: %s\n",
+			vendor->byte_length, (char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		goto exit;
+	}
+
+	memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
+	hubdev_ptr = __va((struct hubdev_info *) addr);
+
+	nasid = hubdev_ptr->hdi_nasid;
+	i = nasid_to_cnodeid(nasid);
+	hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
+	*hubdev = *hubdev_ptr;
+	sn_common_hubdev_init(hubdev);
+
+exit:
+	kfree(buffer.pointer);
+	return AE_OK;		/* Continue walking namespace */
+}
+
+/*
+ * sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
+ *			  the ACPI Vendor resource for this bus.
+ */
+static struct pcibus_bussoft *
+sn_get_bussoft_ptr(struct pci_bus *bus)
+{
+	u64 addr;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_handle handle;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	struct acpi_resource *resource;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+
+
+	handle = PCI_CONTROLLER(bus)->acpi_handle;
+	status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR "%s: "
+		       "acpi_get_vendor_resource() failed (0x%x) for: %s\n",
+		       __func__, status, (char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		return NULL;
+	}
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	     sizeof(struct pcibus_bussoft *)) {
+		printk(KERN_ERR
+		       "%s: Invalid vendor data length %d\n",
+			__func__, vendor->byte_length);
+		kfree(buffer.pointer);
+		return NULL;
+	}
+	memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
+	prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
+	kfree(buffer.pointer);
+
+	return prom_bussoft_ptr;
+}
+
+/*
+ * sn_extract_device_info - Extract the pcidev_info and the sn_irq_info
+ *			    pointers from the vendor resource using the
+ *			    provided acpi handle, and copy the structures
+ *			    into the argument buffers.
+ */
+static int
+sn_extract_device_info(acpi_handle handle, struct pcidev_info **pcidev_info,
+		    struct sn_irq_info **sn_irq_info)
+{
+	u64 addr;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct sn_irq_info *irq_info, *irq_info_prom;
+	struct pcidev_info *pcidev_ptr, *pcidev_prom_ptr;
+	struct acpi_resource *resource;
+	int ret = 0;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+
+	/*
+	 * The pointer to this device's pcidev_info structure in
+	 * the PROM, is in the vendor resource.
+	 */
+	status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR
+		       "%s: acpi_get_vendor_resource() failed (0x%x) for: %s\n",
+			__func__, status, (char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		return 1;
+	}
+
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	    sizeof(struct pci_devdev_info *)) {
+		acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR
+		       "%s: Invalid vendor data length: %d for: %s\n",
+			 __func__, vendor->byte_length,
+			(char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		ret = 1;
+		goto exit;
+	}
+
+	pcidev_ptr = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+	if (!pcidev_ptr)
+		panic("%s: Unable to alloc memory for pcidev_info", __func__);
+
+	memcpy(&addr, vendor->byte_data, sizeof(struct pcidev_info *));
+	pcidev_prom_ptr = __va(addr);
+	memcpy(pcidev_ptr, pcidev_prom_ptr, sizeof(struct pcidev_info));
+
+	/* Get the IRQ info */
+	irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+	if (!irq_info)
+		 panic("%s: Unable to alloc memory for sn_irq_info", __func__);
+
+	if (pcidev_ptr->pdi_sn_irq_info) {
+		irq_info_prom = __va(pcidev_ptr->pdi_sn_irq_info);
+		memcpy(irq_info, irq_info_prom, sizeof(struct sn_irq_info));
+	}
+
+	*pcidev_info = pcidev_ptr;
+	*sn_irq_info = irq_info;
+
+exit:
+	kfree(buffer.pointer);
+	return ret;
+}
+
+static unsigned int
+get_host_devfn(acpi_handle device_handle, acpi_handle rootbus_handle)
+{
+	unsigned long long adr;
+	acpi_handle child;
+	unsigned int devfn;
+	int function;
+	acpi_handle parent;
+	int slot;
+	acpi_status status;
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+	acpi_get_name(device_handle, ACPI_FULL_PATHNAME, &name_buffer);
+
+	/*
+	 * Do an upward search to find the root bus device, and
+	 * obtain the host devfn from the previous child device.
+	 */
+	child = device_handle;
+	while (child) {
+		status = acpi_get_parent(child, &parent);
+		if (ACPI_FAILURE(status)) {
+			printk(KERN_ERR "%s: acpi_get_parent() failed "
+			       "(0x%x) for: %s\n", __func__, status,
+				(char *)name_buffer.pointer);
+			panic("%s: Unable to find host devfn\n", __func__);
+		}
+		if (parent == rootbus_handle)
+			break;
+		child = parent;
+	}
+	if (!child) {
+		printk(KERN_ERR "%s: Unable to find root bus for: %s\n",
+		       __func__, (char *)name_buffer.pointer);
+		BUG();
+	}
+
+	status = acpi_evaluate_integer(child, METHOD_NAME__ADR, NULL, &adr);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "%s: Unable to get _ADR (0x%x) for: %s\n",
+		       __func__, status, (char *)name_buffer.pointer);
+		panic("%s: Unable to find host devfn\n", __func__);
+	}
+
+	kfree(name_buffer.pointer);
+
+	slot = (adr >> 16) & 0xffff;
+	function = adr & 0xffff;
+	devfn = PCI_DEVFN(slot, function);
+	return devfn;
+}
+
+/*
+ * find_matching_device - Callback routine to find the ACPI device
+ *			  that matches up with our pci_dev device.
+ *			  Matching is done on bus number and devfn.
+ *			  To find the bus number for a particular
+ *			  ACPI device, we must look at the _BBN method
+ *			  of its parent.
+ */
+static acpi_status
+find_matching_device(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+	unsigned long long bbn = -1;
+	unsigned long long adr;
+	acpi_handle parent = NULL;
+	acpi_status status;
+	unsigned int devfn;
+	int function;
+	int slot;
+	struct sn_pcidev_match *info = context;
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+        status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
+                                       &adr);
+        if (ACPI_SUCCESS(status)) {
+		status = acpi_get_parent(handle, &parent);
+		if (ACPI_FAILURE(status)) {
+			acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+			printk(KERN_ERR
+			       "%s: acpi_get_parent() failed (0x%x) for: %s\n",
+				__func__, status, (char *)name_buffer.pointer);
+			kfree(name_buffer.pointer);
+			return AE_OK;
+		}
+		status = acpi_evaluate_integer(parent, METHOD_NAME__BBN,
+					       NULL, &bbn);
+		if (ACPI_FAILURE(status)) {
+			acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
+			printk(KERN_ERR
+			  "%s: Failed to find _BBN in parent of: %s\n",
+					__func__, (char *)name_buffer.pointer);
+			kfree(name_buffer.pointer);
+			return AE_OK;
+		}
+
+                slot = (adr >> 16) & 0xffff;
+                function = adr & 0xffff;
+                devfn = PCI_DEVFN(slot, function);
+                if ((info->devfn == devfn) && (info->bus == bbn)) {
+			/* We have a match! */
+			info->handle = handle;
+			return 1;
+		}
+	}
+	return AE_OK;
+}
+
+/*
+ * sn_acpi_get_pcidev_info - Search ACPI namespace for the acpi
+ *			     device matching the specified pci_dev,
+ *			     and return the pcidev info and irq info.
+ */
+int
+sn_acpi_get_pcidev_info(struct pci_dev *dev, struct pcidev_info **pcidev_info,
+			struct sn_irq_info **sn_irq_info)
+{
+	unsigned int host_devfn;
+	struct sn_pcidev_match pcidev_match;
+	acpi_handle rootbus_handle;
+	unsigned long long segment;
+	acpi_status status;
+	struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+	rootbus_handle = PCI_CONTROLLER(dev)->acpi_handle;
+        status = acpi_evaluate_integer(rootbus_handle, METHOD_NAME__SEG, NULL,
+                                       &segment);
+        if (ACPI_SUCCESS(status)) {
+		if (segment != pci_domain_nr(dev)) {
+			acpi_get_name(rootbus_handle, ACPI_FULL_PATHNAME,
+				&name_buffer);
+			printk(KERN_ERR
+			       "%s: Segment number mismatch, 0x%llx vs 0x%x for: %s\n",
+			       __func__, segment, pci_domain_nr(dev),
+			       (char *)name_buffer.pointer);
+			kfree(name_buffer.pointer);
+			return 1;
+		}
+	} else {
+		acpi_get_name(rootbus_handle, ACPI_FULL_PATHNAME, &name_buffer);
+		printk(KERN_ERR "%s: Unable to get __SEG from: %s\n",
+		       __func__, (char *)name_buffer.pointer);
+		kfree(name_buffer.pointer);
+		return 1;
+	}
+
+	/*
+	 * We want to search all devices in this segment/domain
+	 * of the ACPI namespace for the matching ACPI device,
+	 * which holds the pcidev_info pointer in its vendor resource.
+	 */
+	pcidev_match.bus = dev->bus->number;
+	pcidev_match.devfn = dev->devfn;
+	pcidev_match.handle = NULL;
+
+	acpi_walk_namespace(ACPI_TYPE_DEVICE, rootbus_handle, ACPI_UINT32_MAX,
+			    find_matching_device, NULL, &pcidev_match, NULL);
+
+	if (!pcidev_match.handle) {
+		printk(KERN_ERR
+		       "%s: Could not find matching ACPI device for %s.\n",
+		       __func__, pci_name(dev));
+		return 1;
+	}
+
+	if (sn_extract_device_info(pcidev_match.handle, pcidev_info, sn_irq_info))
+		return 1;
+
+	/* Build up the pcidev_info.pdi_slot_host_handle */
+	host_devfn = get_host_devfn(pcidev_match.handle, rootbus_handle);
+	(*pcidev_info)->pdi_slot_host_handle =
+			((unsigned long) pci_domain_nr(dev) << 40) |
+					/* bus == 0 */
+					host_devfn;
+	return 0;
+}
+
+/*
+ * sn_acpi_slot_fixup - Obtain the pcidev_info and sn_irq_info.
+ *			Perform any SN specific slot fixup.
+ *			At present there does not appear to be
+ *			any generic way to handle a ROM image
+ *			that has been shadowed by the PROM, so
+ *			we pass a pointer to it	within the
+ *			pcidev_info structure.
+ */
+
+void
+sn_acpi_slot_fixup(struct pci_dev *dev)
+{
+	void __iomem *addr;
+	struct pcidev_info *pcidev_info = NULL;
+	struct sn_irq_info *sn_irq_info = NULL;
+	size_t image_size, size;
+
+	if (sn_acpi_get_pcidev_info(dev, &pcidev_info, &sn_irq_info)) {
+		panic("%s:  Failure obtaining pcidev_info for %s\n",
+		      __func__, pci_name(dev));
+	}
+
+	if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
+		/*
+		 * A valid ROM image exists and has been shadowed by the
+		 * PROM. Setup the pci_dev ROM resource with the address
+		 * of the shadowed copy, and the actual length of the ROM image.
+		 */
+		size = pci_resource_len(dev, PCI_ROM_RESOURCE);
+		addr = ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+			       size);
+		image_size = pci_get_rom_size(dev, addr, size);
+		dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
+		dev->resource[PCI_ROM_RESOURCE].end =
+					(unsigned long) addr + image_size - 1;
+		dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
+	}
+	sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info);
+}
+
+EXPORT_SYMBOL(sn_acpi_slot_fixup);
+
+
+/*
+ * sn_acpi_bus_fixup -  Perform SN specific setup of software structs
+ *			(pcibus_bussoft, pcidev_info) and hardware
+ *			registers, for the specified bus and devices under it.
+ */
+void
+sn_acpi_bus_fixup(struct pci_bus *bus)
+{
+	struct pci_dev *pci_dev = NULL;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+
+	if (!bus->parent) {	/* If root bus */
+		prom_bussoft_ptr = sn_get_bussoft_ptr(bus);
+		if (prom_bussoft_ptr == NULL) {
+			printk(KERN_ERR
+			       "%s: 0x%04x:0x%02x Unable to "
+			       "obtain prom_bussoft_ptr\n",
+			       __func__, pci_domain_nr(bus), bus->number);
+			return;
+		}
+		sn_common_bus_fixup(bus, prom_bussoft_ptr);
+	}
+	list_for_each_entry(pci_dev, &bus->devices, bus_list) {
+		sn_acpi_slot_fixup(pci_dev);
+	}
+}
+
+/*
+ * sn_io_acpi_init - PROM has ACPI support for IO, defining at a minimum the
+ *		     nodes and root buses in the DSDT. As a result, bus scanning
+ *		     will be initiated by the Linux ACPI code.
+ */
+
+void __init
+sn_io_acpi_init(void)
+{
+	u64 result;
+	long status;
+
+	/* SN Altix does not follow the IOSAPIC IRQ routing model */
+	acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
+
+	/* Setup hubdev_info for all SGIHUB/SGITIO devices */
+	acpi_get_devices("SGIHUB", sn_acpi_hubdev_init, NULL, NULL);
+	acpi_get_devices("SGITIO", sn_acpi_hubdev_init, NULL, NULL);
+
+	status = sal_ioif_init(&result);
+	if (status || result)
+		panic("sal_ioif_init failed: [%lx] %s\n",
+		      status, ia64_sal_strerror(status));
+}