[PATCH] pciehp: reduce dependence on ACPI

Reduce the PCI Express hotplug driver's dependence on ACPI.
We don't walk the acpi namespace anymore to build a list of
bridges and devices. We go to ACPI only to run the _OSC or
_OSHP methods to transition control of hotplug hardware from
system BIOS to the hotplug driver, and to run the _HPP
method to get hotplug device parameters like cache line size,
latency timer and SERR/PERR enable from BIOS.

Note that one of the side effects of this patch is that pciehp
does not automatically enable the hot-added device or its DMA
bus mastering capability now. It expects the device driver to
do that. This may break some drivers and we will have to fix
them as they are reported.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 56 deletions

diff --git a/drivers/pci/hotplug/pciehprm_nonacpi.h b/drivers/pci/hotplug/pciehprm_nonacpi.h
deleted file mode 100644
index b10603b..0000000
--- a/drivers/pci/hotplug/pciehprm_nonacpi.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
- *
- * Copyright (C) 1995,2001 Compaq Computer Corporation
- * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001 IBM Corp.
- * Copyright (C) 2003-2004 Intel Corporation
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
- *
- */
-
-#ifndef _PCIEHPRM_NONACPI_H_
-#define _PCIEHPRM_NONACPI_H_
-
-struct irq_info {
-	u8 bus, devfn;		/* bus, device and function */
-	struct {
-		u8 link;	/* IRQ line ID, chipset dependent, 0=not routed */
-		u16 bitmap;	/* Available IRQs */
-	} __attribute__ ((packed)) irq[4];
-	u8 slot;		/* slot number, 0=onboard */
-	u8 rfu;
-} __attribute__ ((packed));
-
-struct irq_routing_table {
-	u32 signature;		/* PIRQ_SIGNATURE should be here */
-	u16 version;		/* PIRQ_VERSION */
-	u16 size;			/* Table size in bytes */
-	u8 rtr_bus, rtr_devfn;	/* Where the interrupt router lies */
-	u16 exclusive_irqs;	/* IRQs devoted exclusively to PCI usage */
-	u16 rtr_vendor, rtr_device;	/* Vendor and device ID of interrupt router */
-	u32 miniport_data;	/* Crap */
-	u8 rfu[11];
-	u8 checksum;		/* Modulo 256 checksum must give zero */
-	struct irq_info slots[0];
-} __attribute__ ((packed));
-
-#endif				/* _PCIEHPRM_NONACPI_H_ */