linux/arch/ia64/sn/kernel/io_init.c

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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, 2000-2004 Silicon Graphics, Inc. All rights reserved.
*/
#include <linux/bootmem.h>
#include <linux/nodemask.h>
#include <asm/sn/types.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/addrs.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include "pci/pcibr_provider.h"
#include "xtalk/xwidgetdev.h"
#include <asm/sn/geo.h>
#include "xtalk/hubdev.h"
#include <asm/sn/io.h>
#include <asm/sn/simulator.h>
#include <asm/sn/tioca_provider.h>
char master_baseio_wid;
nasid_t master_nasid = INVALID_NASID; /* Partition Master */
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 */
/*
* 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)
{
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. This list is needed
* to implement the WAR - Flush DMA data on PIO Reads.
*/
static inline uint64_t
sal_get_widget_dmaflush_list(u64 nasid, u64 widget_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_WIDGET_DMAFLUSH_LIST,
(u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
0);
return ret_stuff.v0;
}
/*
* Retrieve the hub device info structure for the given nasid.
*/
static inline uint64_t 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 uint64_t 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 uint64_t
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_alloc_pci_sysdata() - This routine allocates a pci controller
* which is expected as the pci_dev and pci_bus sysdata by the Linux
* PCI infrastructure.
*/
static inline struct pci_controller *sn_alloc_pci_sysdata(void)
{
struct pci_controller *pci_sysdata;
pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
if (!pci_sysdata)
BUG();
memset(pci_sysdata, 0, sizeof(*pci_sysdata));
return pci_sysdata;
}
/*
* 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_list *sn_flush_device_list;
struct hubdev_info *hubdev;
uint64_t status;
uint64_t nasid;
int i, widget;
for (i = 0; i < numionodes; i++) {
hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
nasid = cnodeid_to_nasid(i);
status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
if (status)
continue;
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_list *), GFP_KERNEL);
memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
(HUB_WIDGET_ID_MAX + 1) *
sizeof(struct sn_flush_device_list *));
for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
sizeof(struct
sn_flush_device_list),
GFP_KERNEL);
memset(sn_flush_device_list, 0x0,
DEV_PER_WIDGET *
sizeof(struct sn_flush_device_list));
status =
sal_get_widget_dmaflush_list(nasid, widget,
(uint64_t)
__pa
(sn_flush_device_list));
if (status) {
kfree(sn_flush_device_list);
continue;
}
hubdev->hdi_flush_nasid_list.widget_p[widget] =
sn_flush_device_list;
}
if (!(i & 1))
hub_error_init(hubdev);
else
ice_error_init(hubdev);
}
}
/*
* 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.
*/
static void sn_pci_fixup_slot(struct pci_dev *dev)
{
int idx;
int segment = 0;
uint64_t size;
struct sn_irq_info *sn_irq_info;
struct pci_dev *host_pci_dev;
int status = 0;
struct pcibus_bussoft *bs;
dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (SN_PCIDEV_INFO(dev) <= 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)
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(SN_PCIDEV_INFO(dev)),
(u64) __pa(sn_irq_info));
if (status)
BUG(); /* Cannot get platform pci device information information */
/* 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])
continue;
start = dev->resource[idx].start;
end = dev->resource[idx].end;
size = end - start;
addr = SN_PCIDEV_INFO(dev)->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;
}
/* set up host bus linkages */
bs = SN_PCIBUS_BUSSOFT(dev->bus);
host_pci_dev =
pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
SN_PCIDEV_INFO(dev)->
pdi_slot_host_handle & 0xffffffff);
SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
SN_PCIDEV_INFO(host_pci_dev);
SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
SN_PCIDEV_INFO(dev)->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) {
SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
sn_irq_fixup(dev, sn_irq_info);
}
}
/*
* 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)
{
int status = 0;
int nasid, cnode;
struct pci_bus *bus;
struct pci_controller *controller;
struct pcibus_bussoft *prom_bussoft_ptr;
struct hubdev_info *hubdev_info;
void *provider_soft;
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);
controller = sn_alloc_pci_sysdata();
/* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
bus = pci_scan_bus(busnum, &pci_root_ops, controller);
if (bus == NULL) {
return; /* error, or bus already scanned */
}
/*
* 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) {
return; /* unsupported asic type */
}
provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
if (provider == NULL) {
return; /* no provider registerd for this asic */
}
provider_soft = NULL;
if (provider->bus_fixup) {
provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
}
if (provider_soft == NULL) {
return; /* fixup failed or not applicable */
}
/*
* Generic bus fixup goes here. Don't reference prom_bussoft_ptr
* after this point.
*/
bus->sysdata = controller;
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]);
}
/*
* 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;
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_SIMULATOR())
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();
/*
* This is needed to avoid bounce limit checks in the blk layer
*/
ia64_max_iommu_merge_mask = ~PAGE_MASK;
sn_fixup_ionodes();
sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
if (sn_irq <= 0)
BUG(); /* Canno afford to run out of memory. */
memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
sn_init_cpei_timer();
#ifdef CONFIG_PROC_FS
register_sn_procfs();
#endif
for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
sn_pci_controller_fixup(0, i);
}
/*
* 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_find_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);