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[IA64] update HP CSR space discovery via ACPI
Get rid of the manual search of _CRS, in favor of acpi_get_vendor_resource() which is now provided by the ACPI CA. And fall back to searching for a consumer-only address space descriptor if no vendor-defined resource is found. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Bjorn Helgaas
Tony Luck
parent
b8cd2af862
commit
03fbaca36a
2 changed files with 88 additions and 86 deletions
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@ -1,105 +1,104 @@
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/*
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* arch/ia64/kernel/acpi-ext.c
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* (c) Copyright 2003, 2006 Hewlett-Packard Development Company, L.P.
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* Alex Williamson <alex.williamson@hp.com>
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* Copyright (C) 2003 Hewlett-Packard
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* Copyright (C) Alex Williamson
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* Copyright (C) Bjorn Helgaas
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*
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* Vendor specific extensions to ACPI.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <asm/acpi-ext.h>
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struct acpi_vendor_descriptor {
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u8 guid_id;
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efi_guid_t guid;
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/*
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* Device CSRs that do not appear in PCI config space should be described
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* via ACPI. This would normally be done with Address Space Descriptors
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* marked as "consumer-only," but old versions of Windows and Linux ignore
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* the producer/consumer flag, so HP invented a vendor-defined resource to
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* describe the location and size of CSR space.
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*/
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struct acpi_vendor_uuid hp_ccsr_uuid = {
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.subtype = 2,
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.data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
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0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
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};
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struct acpi_vendor_info {
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struct acpi_vendor_descriptor *descriptor;
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u8 *data;
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u32 length;
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};
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acpi_status
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acpi_vendor_resource_match(struct acpi_resource *resource, void *context)
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{
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struct acpi_vendor_info *info = (struct acpi_vendor_info *)context;
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struct acpi_resource_vendor *vendor;
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struct acpi_vendor_descriptor *descriptor;
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u32 byte_length;
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if (resource->type != ACPI_RESOURCE_TYPE_VENDOR)
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return AE_OK;
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vendor = (struct acpi_resource_vendor *)&resource->data;
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descriptor = (struct acpi_vendor_descriptor *)vendor->byte_data;
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if (vendor->byte_length <= sizeof(*info->descriptor) ||
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descriptor->guid_id != info->descriptor->guid_id ||
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efi_guidcmp(descriptor->guid, info->descriptor->guid))
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return AE_OK;
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byte_length = vendor->byte_length - sizeof(struct acpi_vendor_descriptor);
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info->data = acpi_os_allocate(byte_length);
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if (!info->data)
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return AE_NO_MEMORY;
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memcpy(info->data,
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vendor->byte_data + sizeof(struct acpi_vendor_descriptor),
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byte_length);
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info->length = byte_length;
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return AE_CTRL_TERMINATE;
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}
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acpi_status
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acpi_find_vendor_resource(acpi_handle obj, struct acpi_vendor_descriptor * id,
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u8 ** data, u32 * byte_length)
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{
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struct acpi_vendor_info info;
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info.descriptor = id;
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info.data = NULL;
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acpi_walk_resources(obj, METHOD_NAME__CRS, acpi_vendor_resource_match,
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&info);
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if (!info.data)
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return AE_NOT_FOUND;
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*data = info.data;
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*byte_length = info.length;
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return AE_OK;
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}
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struct acpi_vendor_descriptor hp_ccsr_descriptor = {
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.guid_id = 2,
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.guid =
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EFI_GUID(0x69e9adf9, 0x924f, 0xab5f, 0xf6, 0x4a, 0x24, 0xd2, 0x01,
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0x37, 0x0e, 0xad)
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};
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acpi_status hp_acpi_csr_space(acpi_handle obj, u64 * csr_base, u64 * csr_length)
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static acpi_status hp_ccsr_locate(acpi_handle obj, u64 *base, u64 *length)
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{
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acpi_status status;
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u8 *data;
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u32 length;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_resource *resource;
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struct acpi_resource_vendor_typed *vendor;
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status =
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acpi_find_vendor_resource(obj, &hp_ccsr_descriptor, &data, &length);
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status = acpi_get_vendor_resource(obj, METHOD_NAME__CRS, &hp_ccsr_uuid,
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&buffer);
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if (ACPI_FAILURE(status) || length != 16)
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resource = buffer.pointer;
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vendor = &resource->data.vendor_typed;
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if (ACPI_FAILURE(status) || vendor->byte_length < 16) {
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status = AE_NOT_FOUND;
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goto exit;
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}
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memcpy(base, vendor->byte_data, sizeof(*base));
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memcpy(length, vendor->byte_data + 8, sizeof(*length));
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exit:
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acpi_os_free(buffer.pointer);
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return status;
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}
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struct csr_space {
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u64 base;
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u64 length;
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};
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static acpi_status find_csr_space(struct acpi_resource *resource, void *data)
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{
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struct csr_space *space = data;
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struct acpi_resource_address64 addr;
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acpi_status status;
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status = acpi_resource_to_address64(resource, &addr);
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if (ACPI_SUCCESS(status) &&
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addr.resource_type == ACPI_MEMORY_RANGE &&
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addr.address_length &&
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addr.producer_consumer == ACPI_CONSUMER) {
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space->base = addr.minimum;
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space->length = addr.address_length;
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return AE_CTRL_TERMINATE;
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}
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return AE_OK; /* keep looking */
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}
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static acpi_status hp_crs_locate(acpi_handle obj, u64 *base, u64 *length)
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{
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struct csr_space space = { 0, 0 };
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acpi_walk_resources(obj, METHOD_NAME__CRS, find_csr_space, &space);
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if (!space.length)
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return AE_NOT_FOUND;
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memcpy(csr_base, data, sizeof(*csr_base));
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memcpy(csr_length, data + 8, sizeof(*csr_length));
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acpi_os_free(data);
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*base = space.base;
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*length = space.length;
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return AE_OK;
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}
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acpi_status hp_acpi_csr_space(acpi_handle obj, u64 *csr_base, u64 *csr_length)
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{
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acpi_status status;
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status = hp_ccsr_locate(obj, csr_base, csr_length);
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if (ACPI_SUCCESS(status))
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return status;
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return hp_crs_locate(obj, csr_base, csr_length);
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}
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EXPORT_SYMBOL(hp_acpi_csr_space);
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@ -1,12 +1,15 @@
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/*
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* ia64/platform/hp/common/hp_acpi.h
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* (c) Copyright 2003, 2006 Hewlett-Packard Development Company, L.P.
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* Alex Williamson <alex.williamson@hp.com>
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* Copyright (C) 2003 Hewlett-Packard
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* Copyright (C) Alex Williamson
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* Copyright (C) Bjorn Helgaas
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Vendor specific extensions to ACPI.
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*/
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#ifndef _ASM_IA64_ACPI_EXT_H
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#define _ASM_IA64_ACPI_EXT_H
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