mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-19 09:59:04 +00:00
8ea6091f50
First phase in introducing ACPI support to SN. In this phase, when running with an ACPI capable PROM, the DSDT will define the root busses and all SN nodes (SGIHUB, SGITIO). An ACPI bus driver will be registered for the node devices, with the acpi_pci_root_driver being used for the root busses. An ACPI vendor descriptor is now used to pass platform specific information for both nodes and busses, eliminating the need for the current SAL calls. Also, with ACPI support, SN fixup code is no longer needed to initiate the PCI bus scans, as the acpi_pci_root_driver does that. However, to maintain backward compatibility with non-ACPI capable PROMs, none of the current 'fixup' code can been deleted, though much restructuring has been done. For example, the bulk of the code in io_common.c is relocated code that is now common regardless of what PROM is running, while io_acpi_init.c and io_init.c contain routines specific to an ACPI or non ACPI capable PROM respectively. A new pci bus fixup platform vector has been created to provide a hook for invoking platform specific bus fixup from pcibios_fixup_bus(). The size of io_space[] has been increased to support systems with large IO configurations. Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
312 lines
8.4 KiB
C
312 lines
8.4 KiB
C
/*
|
|
* 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) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <asm/sn/types.h>
|
|
#include <asm/sn/addrs.h>
|
|
#include <asm/sn/io.h>
|
|
#include <asm/sn/module.h>
|
|
#include <asm/sn/intr.h>
|
|
#include <asm/sn/pcibus_provider_defs.h>
|
|
#include <asm/sn/pcidev.h>
|
|
#include <asm/sn/sn_sal.h>
|
|
#include "xtalk/hubdev.h"
|
|
|
|
/*
|
|
* The code in this file will only be executed when running with
|
|
* a PROM that does _not_ have base ACPI IO support.
|
|
* (i.e., SN_ACPI_BASE_SUPPORT() == 0)
|
|
*/
|
|
|
|
static int max_segment_number; /* Default highest segment number */
|
|
static int max_pcibus_number = 255; /* Default highest pci bus number */
|
|
|
|
|
|
/*
|
|
* Retrieve the hub device info structure for the given nasid.
|
|
*/
|
|
static inline u64 sal_get_hubdev_info(u64 handle, u64 address)
|
|
{
|
|
struct ia64_sal_retval ret_stuff;
|
|
ret_stuff.status = 0;
|
|
ret_stuff.v0 = 0;
|
|
|
|
SAL_CALL_NOLOCK(ret_stuff,
|
|
(u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
|
|
(u64) handle, (u64) address, 0, 0, 0, 0, 0);
|
|
return ret_stuff.v0;
|
|
}
|
|
|
|
/*
|
|
* Retrieve the pci bus information given the bus number.
|
|
*/
|
|
static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
|
|
{
|
|
struct ia64_sal_retval ret_stuff;
|
|
ret_stuff.status = 0;
|
|
ret_stuff.v0 = 0;
|
|
|
|
SAL_CALL_NOLOCK(ret_stuff,
|
|
(u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
|
|
(u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
|
|
return ret_stuff.v0;
|
|
}
|
|
|
|
|
|
/*
|
|
* sn_fixup_ionodes() - This routine initializes the HUB data structure for
|
|
* each node in the system. This function is only
|
|
* executed when running with a non-ACPI capable PROM.
|
|
*/
|
|
static void __init sn_fixup_ionodes(void)
|
|
{
|
|
|
|
struct hubdev_info *hubdev;
|
|
u64 status;
|
|
u64 nasid;
|
|
int i;
|
|
extern void sn_common_hubdev_init(struct hubdev_info *);
|
|
|
|
/*
|
|
* Get SGI Specific HUB chipset information.
|
|
* Inform Prom that this kernel can support domain bus numbering.
|
|
*/
|
|
for (i = 0; i < num_cnodes; i++) {
|
|
hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
|
|
nasid = cnodeid_to_nasid(i);
|
|
hubdev->max_segment_number = 0xffffffff;
|
|
hubdev->max_pcibus_number = 0xff;
|
|
status = sal_get_hubdev_info(nasid, (u64) __pa(hubdev));
|
|
if (status)
|
|
continue;
|
|
|
|
/* Save the largest Domain and pcibus numbers found. */
|
|
if (hubdev->max_segment_number) {
|
|
/*
|
|
* Dealing with a Prom that supports segments.
|
|
*/
|
|
max_segment_number = hubdev->max_segment_number;
|
|
max_pcibus_number = hubdev->max_pcibus_number;
|
|
}
|
|
sn_common_hubdev_init(hubdev);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* sn_pci_legacy_window_fixup - Create PCI controller windows for
|
|
* legacy IO and MEM space. This needs to
|
|
* be done here, as the PROM does not have
|
|
* ACPI support defining the root buses
|
|
* and their resources (_CRS),
|
|
*/
|
|
static void
|
|
sn_legacy_pci_window_fixup(struct pci_controller *controller,
|
|
u64 legacy_io, u64 legacy_mem)
|
|
{
|
|
controller->window = kcalloc(2, sizeof(struct pci_window),
|
|
GFP_KERNEL);
|
|
if (controller->window == NULL)
|
|
BUG();
|
|
controller->window[0].offset = legacy_io;
|
|
controller->window[0].resource.name = "legacy_io";
|
|
controller->window[0].resource.flags = IORESOURCE_IO;
|
|
controller->window[0].resource.start = legacy_io;
|
|
controller->window[0].resource.end =
|
|
controller->window[0].resource.start + 0xffff;
|
|
controller->window[0].resource.parent = &ioport_resource;
|
|
controller->window[1].offset = legacy_mem;
|
|
controller->window[1].resource.name = "legacy_mem";
|
|
controller->window[1].resource.flags = IORESOURCE_MEM;
|
|
controller->window[1].resource.start = legacy_mem;
|
|
controller->window[1].resource.end =
|
|
controller->window[1].resource.start + (1024 * 1024) - 1;
|
|
controller->window[1].resource.parent = &iomem_resource;
|
|
controller->windows = 2;
|
|
}
|
|
|
|
/*
|
|
* sn_pci_window_fixup() - Create a pci_window for each device resource.
|
|
* It will setup pci_windows for use by
|
|
* pcibios_bus_to_resource(), pcibios_resource_to_bus(),
|
|
* etc.
|
|
*/
|
|
static void
|
|
sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
|
|
s64 * pci_addrs)
|
|
{
|
|
struct pci_controller *controller = PCI_CONTROLLER(dev->bus);
|
|
unsigned int i;
|
|
unsigned int idx;
|
|
unsigned int new_count;
|
|
struct pci_window *new_window;
|
|
|
|
if (count == 0)
|
|
return;
|
|
idx = controller->windows;
|
|
new_count = controller->windows + count;
|
|
new_window = kcalloc(new_count, sizeof(struct pci_window), GFP_KERNEL);
|
|
if (new_window == NULL)
|
|
BUG();
|
|
if (controller->window) {
|
|
memcpy(new_window, controller->window,
|
|
sizeof(struct pci_window) * controller->windows);
|
|
kfree(controller->window);
|
|
}
|
|
|
|
/* Setup a pci_window for each device resource. */
|
|
for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
|
|
if (pci_addrs[i] == -1)
|
|
continue;
|
|
|
|
new_window[idx].offset = dev->resource[i].start - pci_addrs[i];
|
|
new_window[idx].resource = dev->resource[i];
|
|
idx++;
|
|
}
|
|
|
|
controller->windows = new_count;
|
|
controller->window = new_window;
|
|
}
|
|
|
|
/*
|
|
* sn_more_slot_fixup() - We are not running with an ACPI capable PROM,
|
|
* and need to convert the pci_dev->resource
|
|
* 'start' and 'end' addresses to mapped addresses,
|
|
* and setup the pci_controller->window array entries.
|
|
*/
|
|
void
|
|
sn_more_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
|
|
{
|
|
unsigned int count = 0;
|
|
int idx;
|
|
s64 pci_addrs[PCI_ROM_RESOURCE + 1];
|
|
unsigned long addr, end, size, start;
|
|
|
|
/* Copy over PIO Mapped Addresses */
|
|
for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
|
|
|
|
if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
|
|
pci_addrs[idx] = -1;
|
|
continue;
|
|
}
|
|
|
|
start = dev->resource[idx].start;
|
|
end = dev->resource[idx].end;
|
|
size = end - start;
|
|
if (size == 0) {
|
|
pci_addrs[idx] = -1;
|
|
continue;
|
|
}
|
|
pci_addrs[idx] = start;
|
|
count++;
|
|
addr = pcidev_info->pdi_pio_mapped_addr[idx];
|
|
addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
|
|
dev->resource[idx].start = addr;
|
|
dev->resource[idx].end = addr + size;
|
|
if (dev->resource[idx].flags & IORESOURCE_IO)
|
|
dev->resource[idx].parent = &ioport_resource;
|
|
else
|
|
dev->resource[idx].parent = &iomem_resource;
|
|
}
|
|
/* Create a pci_window in the pci_controller struct for
|
|
* each device resource.
|
|
*/
|
|
if (count > 0)
|
|
sn_pci_window_fixup(dev, count, pci_addrs);
|
|
}
|
|
|
|
/*
|
|
* sn_pci_controller_fixup() - This routine sets up a bus's resources
|
|
* consistent with the Linux PCI abstraction layer.
|
|
*/
|
|
static void
|
|
sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
|
|
{
|
|
s64 status = 0;
|
|
struct pci_controller *controller;
|
|
struct pcibus_bussoft *prom_bussoft_ptr;
|
|
|
|
|
|
status = sal_get_pcibus_info((u64) segment, (u64) busnum,
|
|
(u64) ia64_tpa(&prom_bussoft_ptr));
|
|
if (status > 0)
|
|
return; /*bus # does not exist */
|
|
prom_bussoft_ptr = __va(prom_bussoft_ptr);
|
|
|
|
controller = kzalloc(sizeof(*controller), GFP_KERNEL);
|
|
if (!controller)
|
|
BUG();
|
|
controller->segment = segment;
|
|
|
|
/*
|
|
* Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup().
|
|
* (platform_data will be overwritten later in sn_common_bus_fixup())
|
|
*/
|
|
controller->platform_data = prom_bussoft_ptr;
|
|
|
|
bus = pci_scan_bus(busnum, &pci_root_ops, controller);
|
|
if (bus == NULL)
|
|
goto error_return; /* error, or bus already scanned */
|
|
|
|
bus->sysdata = controller;
|
|
|
|
return;
|
|
|
|
error_return:
|
|
|
|
kfree(controller);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* sn_bus_fixup
|
|
*/
|
|
void
|
|
sn_bus_fixup(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *pci_dev = NULL;
|
|
struct pcibus_bussoft *prom_bussoft_ptr;
|
|
extern void sn_common_bus_fixup(struct pci_bus *,
|
|
struct pcibus_bussoft *);
|
|
|
|
|
|
if (!bus->parent) { /* If root bus */
|
|
prom_bussoft_ptr = PCI_CONTROLLER(bus)->platform_data;
|
|
if (prom_bussoft_ptr == NULL) {
|
|
printk(KERN_ERR
|
|
"sn_bus_fixup: 0x%04x:0x%02x Unable to "
|
|
"obtain prom_bussoft_ptr\n",
|
|
pci_domain_nr(bus), bus->number);
|
|
return;
|
|
}
|
|
sn_common_bus_fixup(bus, prom_bussoft_ptr);
|
|
sn_legacy_pci_window_fixup(PCI_CONTROLLER(bus),
|
|
prom_bussoft_ptr->bs_legacy_io,
|
|
prom_bussoft_ptr->bs_legacy_mem);
|
|
}
|
|
list_for_each_entry(pci_dev, &bus->devices, bus_list) {
|
|
sn_pci_fixup_slot(pci_dev);
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
* sn_io_init - PROM does not have ACPI support to define nodes or root buses,
|
|
* so we need to do things the hard way, including initiating the
|
|
* bus scanning ourselves.
|
|
*/
|
|
|
|
void __init sn_io_init(void)
|
|
{
|
|
int i, j;
|
|
|
|
sn_fixup_ionodes();
|
|
|
|
/* busses are not known yet ... */
|
|
for (i = 0; i <= max_segment_number; i++)
|
|
for (j = 0; j <= max_pcibus_number; j++)
|
|
sn_pci_controller_fixup(i, j, NULL);
|
|
}
|