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linux/arch/ia64/sn/kernel/io_init.c
Prarit Bhargava 5f7f5b0c99 [IA64-SGI] Older PROM WAR for device flush code 
Work-around to temporarily support older PROMs with new flush device code.

This code allows systems running older PROMs to continue to run on the new
kernel base until a new official PROM is released.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-17 10:08:37 -08:00

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/*
* 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, 2000-2005 Silicon Graphics, Inc. All rights reserved.
*/
#include <linux/bootmem.h>
#include <linux/nodemask.h>
#include <asm/sn/types.h>
#include <asm/sn/addrs.h>
#include <asm/sn/geo.h>
#include <asm/sn/io.h>
#include <asm/sn/pcibr_provider.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/simulator.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/tioca_provider.h>
#include <asm/sn/tioce_provider.h>
#include "xtalk/hubdev.h"
#include "xtalk/xwidgetdev.h"
static struct list_head sn_sysdata_list;
/* sysdata list struct */
struct sysdata_el {
struct list_head entry;
void *sysdata;
};
struct slab_info {
struct hubdev_info hubdev;
};
struct brick {
moduleid_t id; /* Module ID of this module */
struct slab_info slab_info[MAX_SLABS + 1];
};
int sn_ioif_inited = 0; /* SN I/O infrastructure initialized? */
struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES]; /* indexed by asic type */
static int max_segment_number = 0; /* Default highest segment number */
static int max_pcibus_number = 255; /* Default highest pci bus number */
/*
* Hooks and struct for unsupported pci providers
*/
static dma_addr_t
sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
{
return 0;
}
static void
sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
{
return;
}
static void *
sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
{
return NULL;
}
static struct sn_pcibus_provider sn_pci_default_provider = {
.dma_map = sn_default_pci_map,
.dma_map_consistent = sn_default_pci_map,
.dma_unmap = sn_default_pci_unmap,
.bus_fixup = sn_default_pci_bus_fixup,
};
/*
* Retrieve the DMA Flush List given nasid, widget, and device.
* This list is needed to implement the WAR - Flush DMA data on PIO Reads.
*/
static inline u64
sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
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_DEVICE_DMAFLUSH_LIST,
(u64) nasid, (u64) widget_num,
(u64) device_num, (u64) address, 0, 0, 0);
return ret_stuff.status;
}
/*
* 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;
}
/*
* Retrieve the pci device information given the bus and device|function number.
*/
static inline u64
sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
u64 sn_irq_info)
{
struct ia64_sal_retval ret_stuff;
ret_stuff.status = 0;
ret_stuff.v0 = 0;
SAL_CALL_NOLOCK(ret_stuff,
(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
(u64) segment, (u64) bus_number, (u64) devfn,
(u64) pci_dev,
sn_irq_info, 0, 0);
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;
}
/* Older PROM flush WAR
*
* 01/16/06 -- This war will be in place until a new official PROM is released.
* Additionally note that the struct sn_flush_device_war also has to be
* removed from arch/ia64/sn/include/xtalk/hubdev.h
*/
static u8 war_implemented = 0;
static void sn_device_fixup_war(u64 nasid, u64 widget, int device,
struct sn_flush_device_common *common)
{
struct sn_flush_device_war *war_list;
struct sn_flush_device_war *dev_entry;
struct ia64_sal_retval isrv = {0,0,0,0};
if (!war_implemented) {
printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
"PROM flush WAR\n");
war_implemented = 1;
}
war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
if (!war_list)
BUG();
SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
nasid, widget, __pa(war_list), 0, 0, 0 ,0);
if (isrv.status)
panic("sn_device_fixup_war failed: %s\n",
ia64_sal_strerror(isrv.status));
dev_entry = war_list + device;
memcpy(common,dev_entry, sizeof(*common));
kfree(war_list);
}
/*
* sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
* each node in the system.
*/
static void sn_fixup_ionodes(void)
{
struct sn_flush_device_kernel *sn_flush_device_kernel;
struct sn_flush_device_kernel *dev_entry;
struct hubdev_info *hubdev;
u64 status;
u64 nasid;
int i, widget, device;
/*
* 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;
}
/* Attach the error interrupt handlers */
if (nasid & 1)
ice_error_init(hubdev);
else
hub_error_init(hubdev);
for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
if (!hubdev->hdi_flush_nasid_list.widget_p)
continue;
hubdev->hdi_flush_nasid_list.widget_p =
kmalloc((HUB_WIDGET_ID_MAX + 1) *
sizeof(struct sn_flush_device_kernel *),
GFP_KERNEL);
memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
(HUB_WIDGET_ID_MAX + 1) *
sizeof(struct sn_flush_device_kernel *));
for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
sn_flush_device_kernel = kmalloc(DEV_PER_WIDGET *
sizeof(struct
sn_flush_device_kernel),
GFP_KERNEL);
if (!sn_flush_device_kernel)
BUG();
memset(sn_flush_device_kernel, 0x0,
DEV_PER_WIDGET *
sizeof(struct sn_flush_device_kernel));
dev_entry = sn_flush_device_kernel;
for (device = 0; device < DEV_PER_WIDGET;
device++,dev_entry++) {
dev_entry->common = kmalloc(sizeof(struct
sn_flush_device_common),
GFP_KERNEL);
if (!dev_entry->common)
BUG();
memset(dev_entry->common, 0x0, sizeof(struct
sn_flush_device_common));
status = sal_get_device_dmaflush_list(nasid,
widget,
device,
(u64)(dev_entry->common));
if (status) {
if (sn_sal_rev() < 0x0450) {
/* shortlived WAR for older
* PROM images
*/
sn_device_fixup_war(nasid,
widget,
device,
dev_entry->common);
}
else
BUG();
}
spin_lock_init(&dev_entry->sfdl_flush_lock);
}
if (sn_flush_device_kernel)
hubdev->hdi_flush_nasid_list.widget_p[widget] =
sn_flush_device_kernel;
}
}
}
/*
* 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,
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;
}
void sn_pci_unfixup_slot(struct pci_dev *dev)
{
struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
sn_irq_unfixup(dev);
pci_dev_put(host_pci_dev);
pci_dev_put(dev);
}
/*
* sn_pci_fixup_slot() - This routine sets up a slot's resources
* consistent with the Linux PCI abstraction layer. Resources acquired
* from our PCI provider include PIO maps to BAR space and interrupt
* objects.
*/
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;
s64 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 */
pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (pcidev_info <= 0)
BUG(); /* Cannot afford to run out of memory */
sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
if (sn_irq_info <= 0)
BUG(); /* Cannot afford to run out of memory */
memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
/* Call to retrieve pci device information needed by kernel. */
status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
dev->devfn,
(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 (!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);
/*
* 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 = (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);
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);
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];
} else {
SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
}
/* Only set up IRQ stuff if this device has a host bus context */
if (bs && 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 {
pcidev_info->pdi_sn_irq_info = NULL;
kfree(sn_irq_info);
}
}
/*
* sn_pci_controller_fixup() - This routine sets up a bus's resources
* consistent with the Linux PCI abstraction layer.
*/
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;
struct sn_pcibus_provider *provider;
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);
/* 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 (bus == NULL) {
bus = pci_scan_bus(busnum, &pci_root_ops, controller);
if (bus == NULL)
goto error_return; /* error, or bus already scanned */
bus->sysdata = NULL;
}
if (bus->sysdata)
goto error_return; /* sysdata already alloc'd */
/*
* Per-provider fixup. Copies the contents from prom to local
* area and links SN_PCIBUS_BUSSOFT().
*/
if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
goto error_return; /* unsupported asic type */
if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
goto error_return; /* no further fixup necessary */
provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
if (provider == NULL)
goto error_return; /* no provider registerd for this asic */
bus->sysdata = controller;
if (provider->bus_fixup)
provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
if (provider_soft == NULL) {
/* fixup failed or not applicable */
bus->sysdata = NULL;
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.
*/
PCI_CONTROLLER(bus)->platform_data = provider_soft;
nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
cnode = nasid_to_cnodeid(nasid);
hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
&(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
/*
* If the node information we obtained during the fixup phase is invalid
* then set controller->node to -1 (undetermined)
*/
if (controller->node >= num_online_nodes()) {
struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
"L_IO=%lx L_MEM=%lx BASE=%lx\n",
b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
printk(KERN_WARNING "on node %d but only %d nodes online."
"Association set to undetermined.\n",
controller->node, num_online_nodes());
controller->node = -1;
}
return;
error_return:
kfree(sn_controller);
return;
}
void sn_bus_store_sysdata(struct pci_dev *dev)
{
struct sysdata_el *element;
element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
if (!element) {
dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
return;
}
element->sysdata = SN_PCIDEV_INFO(dev);
list_add(&element->entry, &sn_sysdata_list);
}
void sn_bus_free_sysdata(void)
{
struct sysdata_el *element;
struct list_head *list;
sn_sysdata_free_start:
list_for_each(list, &sn_sysdata_list) {
element = list_entry(list, struct sysdata_el, entry);
list_del(&element->entry);
kfree(element->sysdata);
kfree(element);
goto sn_sysdata_free_start;
}
return;
}
/*
* Ugly hack to get PCI setup until we have a proper ACPI namespace.
*/
#define PCI_BUSES_TO_SCAN 256
static int __init sn_pci_init(void)
{
int i = 0;
int j = 0;
struct pci_dev *pci_dev = NULL;
extern void sn_init_cpei_timer(void);
#ifdef CONFIG_PROC_FS
extern void register_sn_procfs(void);
#endif
if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
return 0;
/*
* prime sn_pci_provider[]. Individial provider init routines will
* override their respective default entries.
*/
for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
sn_pci_provider[i] = &sn_pci_default_provider;
pcibr_init_provider();
tioca_init_provider();
tioce_init_provider();
/*
* This is needed to avoid bounce limit checks in the blk layer
*/
ia64_max_iommu_merge_mask = ~PAGE_MASK;
sn_fixup_ionodes();
sn_irq_lh_init();
INIT_LIST_HEAD(&sn_sysdata_list);
sn_init_cpei_timer();
#ifdef CONFIG_PROC_FS
register_sn_procfs();
#endif
/* 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);
/*
* Generic Linux PCI Layer has created the pci_bus and pci_dev
* structures - time for us to add our SN PLatform specific
* information.
*/
while ((pci_dev =
pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
sn_pci_fixup_slot(pci_dev);
sn_ioif_inited = 1; /* sn I/O infrastructure now initialized */
return 0;
}
/*
* hubdev_init_node() - Creates the HUB data structure and link them to it's
* own NODE specific data area.
*/
void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
{
struct hubdev_info *hubdev_info;
if (node >= num_online_nodes()) /* Headless/memless IO nodes */
hubdev_info =
(struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
sizeof(struct
hubdev_info));
else
hubdev_info =
(struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
sizeof(struct
hubdev_info));
npda->pdinfo = (void *)hubdev_info;
}
geoid_t
cnodeid_get_geoid(cnodeid_t cnode)
{
struct hubdev_info *hubdev;
hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
return hubdev->hdi_geoid;
}
subsys_initcall(sn_pci_init);
EXPORT_SYMBOL(sn_pci_fixup_slot);
EXPORT_SYMBOL(sn_pci_unfixup_slot);
EXPORT_SYMBOL(sn_pci_controller_fixup);
EXPORT_SYMBOL(sn_bus_store_sysdata);
EXPORT_SYMBOL(sn_bus_free_sysdata);
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