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[IA64-SGI] altix: pci_window fixup
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Altix only patch to add fixup code that sets up
pci_controller->window. This code is a temporary
fix until ACPI support on Altix is added.

Also, corrects the usage of pci_dev->sysdata,
which had previously been used to reference
platform specific device info, to now point to
a pci_controller struct.

Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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John Keller authored and Tony Luck committed Dec 6, 2005
1 parent 3e356b2 commit 3ec829b
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Showing 2 changed files with 148 additions and 25 deletions.
153 changes: 131 additions & 22 deletions arch/ia64/sn/kernel/io_init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
*/

#include <linux/bootmem.h>
Expand Down Expand Up @@ -146,6 +146,24 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
return ret_stuff.v0;
}

/*
* sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
* device.
*/
inline struct pcidev_info *
sn_pcidev_info_get(struct pci_dev *dev)
{
struct pcidev_info *pcidev;

list_for_each_entry(pcidev,
&(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) {
if (pcidev->pdi_linux_pcidev == dev) {
return pcidev;
}
}
return NULL;
}

/*
* sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
* each node in the system.
Expand Down Expand Up @@ -229,6 +247,50 @@ static void sn_fixup_ionodes(void)

}

/*
* sn_pci_window_fixup() - Create a pci_window for each device resource.
* Until ACPI support is added, we need this code
* to 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,
int64_t * 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;
}

void sn_pci_unfixup_slot(struct pci_dev *dev)
{
struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
Expand All @@ -246,21 +308,23 @@ void sn_pci_unfixup_slot(struct pci_dev *dev)
*/
void sn_pci_fixup_slot(struct pci_dev *dev)
{
unsigned int count = 0;
int idx;
int segment = pci_domain_nr(dev->bus);
int status = 0;
struct pcibus_bussoft *bs;
struct pci_bus *host_pci_bus;
struct pci_dev *host_pci_dev;
struct pcidev_info *pcidev_info;
int64_t pci_addrs[PCI_ROM_RESOURCE + 1];
struct sn_irq_info *sn_irq_info;
unsigned long size;
unsigned int bus_no, devfn;

pci_dev_get(dev); /* for the sysdata pointer */
dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (SN_PCIDEV_INFO(dev) <= 0)
pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (pcidev_info <= 0)
BUG(); /* Cannot afford to run out of memory */
memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));

sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
if (sn_irq_info <= 0)
Expand All @@ -270,22 +334,34 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
/* Call to retrieve pci device information needed by kernel. */
status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
dev->devfn,
(u64) __pa(SN_PCIDEV_INFO(dev)),
(u64) __pa(pcidev_info),
(u64) __pa(sn_irq_info));
if (status)
BUG(); /* Cannot get platform pci device information */

/* Add pcidev_info to list in sn_pci_controller struct */
list_add_tail(&pcidev_info->pdi_list,
&(SN_PCI_CONTROLLER(dev->bus)->pcidev_info));

/* Copy over PIO Mapped Addresses */
for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
unsigned long start, end, addr;

if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[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;
addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
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;
Expand All @@ -294,23 +370,27 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
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);

/*
* Using the PROMs values for the PCI host bus, get the Linux
* PCI host_pci_dev struct and set up host bus linkages
*/

bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
host_pci_bus = pci_find_bus(segment, bus_no);
host_pci_dev = pci_get_slot(host_pci_bus, devfn);

SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
SN_PCIDEV_INFO(host_pci_dev);
SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
pcidev_info->host_pci_dev = host_pci_dev;
pcidev_info->pdi_linux_pcidev = dev;
pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
bs = SN_PCIBUS_BUSSOFT(dev->bus);
SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
pcidev_info->pdi_pcibus_info = bs;

if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
Expand All @@ -320,11 +400,11 @@ void sn_pci_fixup_slot(struct pci_dev *dev)

/* Only set up IRQ stuff if this device has a host bus context */
if (bs && sn_irq_info->irq_irq) {
SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
pcidev_info->pdi_sn_irq_info = sn_irq_info;
dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
sn_irq_fixup(dev, sn_irq_info);
} else {
SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
pcidev_info->pdi_sn_irq_info = NULL;
kfree(sn_irq_info);
}
}
Expand All @@ -338,6 +418,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
int status = 0;
int nasid, cnode;
struct pci_controller *controller;
struct sn_pci_controller *sn_controller;
struct pcibus_bussoft *prom_bussoft_ptr;
struct hubdev_info *hubdev_info;
void *provider_soft = NULL;
Expand All @@ -349,10 +430,15 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
return; /*bus # does not exist */
prom_bussoft_ptr = __va(prom_bussoft_ptr);

controller = kzalloc(sizeof(struct pci_controller), GFP_KERNEL);
/* Allocate a sn_pci_controller, which has a pci_controller struct
* as the first member.
*/
sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL);
if (!sn_controller)
BUG();
INIT_LIST_HEAD(&sn_controller->pcidev_info);
controller = &sn_controller->pci_controller;
controller->segment = segment;
if (!controller)
BUG();

if (bus == NULL) {
bus = pci_scan_bus(busnum, &pci_root_ops, controller);
Expand Down Expand Up @@ -389,6 +475,29 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
goto error_return;
}

/*
* Setup pci_windows for legacy IO and MEM space.
* (Temporary until ACPI support is in place.)
*/
controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL);
if (controller->window == NULL)
BUG();
controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io;
controller->window[0].resource.name = "legacy_io";
controller->window[0].resource.flags = IORESOURCE_IO;
controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io;
controller->window[0].resource.end =
controller->window[0].resource.start + 0xffff;
controller->window[0].resource.parent = &ioport_resource;
controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem;
controller->window[1].resource.name = "legacy_mem";
controller->window[1].resource.flags = IORESOURCE_MEM;
controller->window[1].resource.start = prom_bussoft_ptr->bs_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;

/*
* Generic bus fixup goes here. Don't reference prom_bussoft_ptr
* after this point.
Expand Down Expand Up @@ -421,7 +530,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)

error_return:

kfree(controller);
kfree(sn_controller);
return;
}

Expand All @@ -434,7 +543,7 @@ void sn_bus_store_sysdata(struct pci_dev *dev)
dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
return;
}
element->sysdata = dev->sysdata;
element->sysdata = SN_PCIDEV_INFO(dev);
list_add(&element->entry, &sn_sysdata_list);
}

Expand Down
20 changes: 17 additions & 3 deletions include/asm-ia64/sn/pcidev.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3,15 +3,27 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_IA64_SN_PCI_PCIDEV_H
#define _ASM_IA64_SN_PCI_PCIDEV_H

#include <linux/pci.h>

#define SN_PCIDEV_INFO(pci_dev) \
((struct pcidev_info *)(pci_dev)->sysdata)
/*
* In ia64, pci_dev->sysdata must be a *pci_controller. To provide access to
* the pcidev_info structs for all devices under a controller, we extend the
* definition of pci_controller, via sn_pci_controller, to include a list
* of pcidev_info.
*/
struct sn_pci_controller {
struct pci_controller pci_controller;
struct list_head pcidev_info;
};

#define SN_PCI_CONTROLLER(dev) ((struct sn_pci_controller *) dev->sysdata)

#define SN_PCIDEV_INFO(dev) sn_pcidev_info_get(dev)

#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
Expand Down Expand Up @@ -53,11 +65,13 @@ struct pcidev_info {
struct sn_irq_info *pdi_sn_irq_info;
struct sn_pcibus_provider *pdi_provider; /* sn pci ops */
struct pci_dev *host_pci_dev; /* host bus link */
struct list_head pdi_list; /* List of pcidev_info */
};

extern void sn_irq_fixup(struct pci_dev *pci_dev,
struct sn_irq_info *sn_irq_info);
extern void sn_irq_unfixup(struct pci_dev *pci_dev);
extern struct pcidev_info * sn_pcidev_info_get(struct pci_dev *);
extern void sn_pci_controller_fixup(int segment, int busnum,
struct pci_bus *bus);
extern void sn_bus_store_sysdata(struct pci_dev *dev);
Expand Down

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