![Greg Kroah-Hartman](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
166 lines
4.8 KiB
C
166 lines
4.8 KiB
C
/*
|
|
* pci_dn.c
|
|
*
|
|
* Copyright (C) 2001 Todd Inglett, IBM Corporation
|
|
*
|
|
* PCI manipulation via device_nodes.
|
|
*
|
|
* 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. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/string.h>
|
|
#include <linux/export.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gfp.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include <asm/firmware.h>
|
|
|
|
/*
|
|
* Traverse_func that inits the PCI fields of the device node.
|
|
* NOTE: this *must* be done before read/write config to the device.
|
|
*/
|
|
void *update_dn_pci_info(struct device_node *dn, void *data)
|
|
{
|
|
struct pci_controller *phb = data;
|
|
const int *type =
|
|
of_get_property(dn, "ibm,pci-config-space-type", NULL);
|
|
const u32 *regs;
|
|
struct pci_dn *pdn;
|
|
|
|
pdn = zalloc_maybe_bootmem(sizeof(*pdn), GFP_KERNEL);
|
|
if (pdn == NULL)
|
|
return NULL;
|
|
dn->data = pdn;
|
|
pdn->node = dn;
|
|
pdn->phb = phb;
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
pdn->pe_number = IODA_INVALID_PE;
|
|
#endif
|
|
regs = of_get_property(dn, "reg", NULL);
|
|
if (regs) {
|
|
/* First register entry is addr (00BBSS00) */
|
|
pdn->busno = (regs[0] >> 16) & 0xff;
|
|
pdn->devfn = (regs[0] >> 8) & 0xff;
|
|
}
|
|
|
|
pdn->pci_ext_config_space = (type && *type == 1);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Traverse a device tree stopping each PCI device in the tree.
|
|
* This is done depth first. As each node is processed, a "pre"
|
|
* function is called and the children are processed recursively.
|
|
*
|
|
* The "pre" func returns a value. If non-zero is returned from
|
|
* the "pre" func, the traversal stops and this value is returned.
|
|
* This return value is useful when using traverse as a method of
|
|
* finding a device.
|
|
*
|
|
* NOTE: we do not run the func for devices that do not appear to
|
|
* be PCI except for the start node which we assume (this is good
|
|
* because the start node is often a phb which may be missing PCI
|
|
* properties).
|
|
* We use the class-code as an indicator. If we run into
|
|
* one of these nodes we also assume its siblings are non-pci for
|
|
* performance.
|
|
*/
|
|
void *traverse_pci_devices(struct device_node *start, traverse_func pre,
|
|
void *data)
|
|
{
|
|
struct device_node *dn, *nextdn;
|
|
void *ret;
|
|
|
|
/* We started with a phb, iterate all childs */
|
|
for (dn = start->child; dn; dn = nextdn) {
|
|
const u32 *classp;
|
|
u32 class;
|
|
|
|
nextdn = NULL;
|
|
classp = of_get_property(dn, "class-code", NULL);
|
|
class = classp ? *classp : 0;
|
|
|
|
if (pre && ((ret = pre(dn, data)) != NULL))
|
|
return ret;
|
|
|
|
/* If we are a PCI bridge, go down */
|
|
if (dn->child && ((class >> 8) == PCI_CLASS_BRIDGE_PCI ||
|
|
(class >> 8) == PCI_CLASS_BRIDGE_CARDBUS))
|
|
/* Depth first...do children */
|
|
nextdn = dn->child;
|
|
else if (dn->sibling)
|
|
/* ok, try next sibling instead. */
|
|
nextdn = dn->sibling;
|
|
if (!nextdn) {
|
|
/* Walk up to next valid sibling. */
|
|
do {
|
|
dn = dn->parent;
|
|
if (dn == start)
|
|
return NULL;
|
|
} while (dn->sibling == NULL);
|
|
nextdn = dn->sibling;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* pci_devs_phb_init_dynamic - setup pci devices under this PHB
|
|
* phb: pci-to-host bridge (top-level bridge connecting to cpu)
|
|
*
|
|
* This routine is called both during boot, (before the memory
|
|
* subsystem is set up, before kmalloc is valid) and during the
|
|
* dynamic lpar operation of adding a PHB to a running system.
|
|
*/
|
|
void pci_devs_phb_init_dynamic(struct pci_controller *phb)
|
|
{
|
|
struct device_node *dn = phb->dn;
|
|
struct pci_dn *pdn;
|
|
|
|
/* PHB nodes themselves must not match */
|
|
update_dn_pci_info(dn, phb);
|
|
pdn = dn->data;
|
|
if (pdn) {
|
|
pdn->devfn = pdn->busno = -1;
|
|
pdn->phb = phb;
|
|
}
|
|
|
|
/* Update dn->phb ptrs for new phb and children devices */
|
|
traverse_pci_devices(dn, update_dn_pci_info, phb);
|
|
}
|
|
|
|
/**
|
|
* pci_devs_phb_init - Initialize phbs and pci devs under them.
|
|
*
|
|
* This routine walks over all phb's (pci-host bridges) on the
|
|
* system, and sets up assorted pci-related structures
|
|
* (including pci info in the device node structs) for each
|
|
* pci device found underneath. This routine runs once,
|
|
* early in the boot sequence.
|
|
*/
|
|
void __init pci_devs_phb_init(void)
|
|
{
|
|
struct pci_controller *phb, *tmp;
|
|
|
|
/* This must be done first so the device nodes have valid pci info! */
|
|
list_for_each_entry_safe(phb, tmp, &hose_list, list_node)
|
|
pci_devs_phb_init_dynamic(phb);
|
|
}
|