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[IA64] hotplug/ia64: SN Hotplug Driver - SN Hotplug Driver code

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This patch is the SGI hotplug driver and additional changes required for
the driver.  These modifications include changes to the SN io_init.c code
for memory management, the inclusion of new SAL calls to enable and disable
PCI slots, and a hotplug-style driver.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Prarit Bhargava 2005-07-06 15:29:53 -07:00 committed by Tony Luck
parent 283c7f6ac6
commit 6f354b014b
8 changed files with 754 additions and 50 deletions
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128
arch/ia64/sn/kernel/io_init.c
View file

@ -23,6 +23,14 @@
nasid_t master_nasid = INVALID_NASID; /* Partition Master */
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;
};
@ -136,23 +144,6 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
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.
@ -220,6 +211,15 @@ static void sn_fixup_ionodes(void)
}
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
@ -238,6 +238,7 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
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)
BUG(); /* Cannot afford to run out of memory */
@ -276,7 +277,8 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
dev->resource[idx].parent = &iomem_resource;
}
/* Using the PROMs values for the PCI host bus, get the Linux
/*
* Using the PROMs values for the PCI host bus, get the Linux
* PCI host_pci_dev struct and set up host bus linkages
*/
@ -313,55 +315,57 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
* 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)
void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
{
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,
status = sal_get_pcibus_info((u64) segment, (u64) busnum,
(u64) ia64_tpa(&prom_bussoft_ptr));
if (status > 0) {
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);
controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
if (!controller)
BUG();
if (bus == NULL) {
bus = pci_scan_bus(busnum, &pci_root_ops, controller);
if (bus == NULL)
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) {
if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
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) {
if (provider == NULL)
return; /* no provider registerd for this asic */
}
provider_soft = NULL;
if (provider->bus_fixup) {
if (provider->bus_fixup)
provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
}
if (provider_soft == NULL) {
if (provider_soft == NULL)
return; /* fixup failed or not applicable */
}
/*
* Generic bus fixup goes here. Don't reference prom_bussoft_ptr
@ -370,12 +374,47 @@ static void sn_pci_controller_fixup(int segment, int busnum)
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]);
return;
error_return:
kfree(controller);
return;
}
void sn_bus_store_sysdata(struct pci_dev *dev)
{
struct sysdata_el *element;
element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
if (!element) {
dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
return;
}
element->sysdata = dev->sysdata;
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;
}
/*
@ -413,15 +452,16 @@ static int __init sn_pci_init(void)
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
for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
sn_pci_controller_fixup(0, i);
}
/* busses are not known yet ... */
for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
sn_pci_controller_fixup(0, i, NULL);
/*
* Generic Linux PCI Layer has created the pci_bus and pci_dev
@ -430,9 +470,8 @@ static int __init sn_pci_init(void)
*/
while ((pci_dev =
pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
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 */
@ -474,3 +513,8 @@ cnodeid_get_geoid(cnodeid_t cnode)
}
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);

6
arch/ia64/sn/kernel/irq.c
View file

@ -284,7 +284,6 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
int cpu = nasid_slice_to_cpuid(nasid, slice);
pci_dev_get(pci_dev);
sn_irq_info->irq_cpuid = cpu;
sn_irq_info->irq_pciioinfo = SN_PCIDEV_INFO(pci_dev);
@ -305,15 +304,16 @@ void sn_irq_unfixup(struct pci_dev *pci_dev)
return;
sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
if (!sn_irq_info || !sn_irq_info->irq_irq)
if (!sn_irq_info || !sn_irq_info->irq_irq) {
kfree(sn_irq_info);
return;
}
unregister_intr_pda(sn_irq_info);
spin_lock(&sn_irq_info_lock);
list_del_rcu(&sn_irq_info->list);
spin_unlock(&sn_irq_info_lock);
call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
pci_dev_put(pci_dev);
}

37
arch/ia64/sn/pci/pcibr/pcibr_provider.c
View file

@ -18,6 +18,40 @@
#include "xtalk/xwidgetdev.h"
#include "xtalk/hubdev.h"
int
sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp)
{
struct ia64_sal_retval ret_stuff;
uint64_t busnum;
ret_stuff.status = 0;
ret_stuff.v0 = 0;
busnum = soft->pbi_buscommon.bs_persist_busnum;
SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, (u64) busnum,
(u64) device, (u64) resp, 0, 0, 0, 0);
return (int)ret_stuff.v0;
}
int
sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
void *resp)
{
struct ia64_sal_retval ret_stuff;
uint64_t busnum;
ret_stuff.status = 0;
ret_stuff.v0 = 0;
busnum = soft->pbi_buscommon.bs_persist_busnum;
SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
(u64) busnum, (u64) device, (u64) action,
(u64) resp, 0, 0, 0);
return (int)ret_stuff.v0;
}
static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
{
struct ia64_sal_retval ret_stuff;
@ -187,3 +221,6 @@ pcibr_init_provider(void)
return 0;
}
EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);

5
drivers/pci/hotplug/Kconfig
View file

@ -187,9 +187,10 @@ config HOTPLUG_PCI_RPA_DLPAR
config HOTPLUG_PCI_SGI
tristate "SGI PCI Hotplug Support"
depends on HOTPLUG_PCI && IA64_SGI_SN2
depends on HOTPLUG_PCI && (IA64_SGI_SN2 || IA64_GENERIC)
help
Say Y here if you have an SGI IA64 Altix system.
Say Y here if you want to use the SGI Altix Hotplug
Driver for PCI devices.
When in doubt, say N.

1
drivers/pci/hotplug/Makefile
View file

@ -14,6 +14,7 @@ obj-$(CONFIG_HOTPLUG_PCI_PCIE) += pciehp.o
obj-$(CONFIG_HOTPLUG_PCI_SHPC) += shpchp.o
obj-$(CONFIG_HOTPLUG_PCI_RPA) += rpaphp.o
obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR) += rpadlpar_io.o
obj-$(CONFIG_HOTPLUG_PCI_SGI) += sgi_hotplug.o
pci_hotplug-objs := pci_hotplug_core.o

611
drivers/pci/hotplug/sgi_hotplug.c Normal file
View file

@ -0,0 +1,611 @@
/*
* 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) 2005 Silicon Graphics, Inc. All rights reserved.
*
* This work was based on the 2.4/2.6 kernel development by Dick Reigner.
* Work to add BIOS PROM support was completed by Mike Habeck.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/types.h>
#include <asm/sn/addrs.h>
#include <asm/sn/l1.h>
#include <asm/sn/module.h>
#include <asm/sn/pcibr_provider.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/types.h>
#include "../pci.h"
#include "pci_hotplug.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)");
MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver");
#define PCIIO_ASIC_TYPE_TIOCA 4
#define PCI_SLOT_ALREADY_UP 2 /* slot already up */
#define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */
#define PCI_L1_ERR 7 /* L1 console command error */
#define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */
#define PCI_L1_QSIZE 128 /* our L1 message buffer size */
#define SN_MAX_HP_SLOTS 32 /* max number of hotplug slots */
#define SGI_HOTPLUG_PROM_REV 0x0420 /* Min. required PROM version */
/* internal list head */
static struct list_head sn_hp_list;
/* hotplug_slot struct's private pointer */
struct slot {
int device_num;
struct pci_bus *pci_bus;
/* this struct for glue internal only */
struct hotplug_slot *hotplug_slot;
struct list_head hp_list;
};
struct pcibr_slot_enable_resp {
int resp_sub_errno;
char resp_l1_msg[PCI_L1_QSIZE + 1];
};
struct pcibr_slot_disable_resp {
int resp_sub_errno;
char resp_l1_msg[PCI_L1_QSIZE + 1];
};
enum sn_pci_req_e {
PCI_REQ_SLOT_ELIGIBLE,
PCI_REQ_SLOT_DISABLE
};
static int enable_slot(struct hotplug_slot *slot);
static int disable_slot(struct hotplug_slot *slot);
static int get_power_status(struct hotplug_slot *slot, u8 *value);
static struct hotplug_slot_ops sn_hotplug_slot_ops = {
.owner = THIS_MODULE,
.enable_slot = enable_slot,
.disable_slot = disable_slot,
.get_power_status = get_power_status,
};
static DECLARE_MUTEX(sn_hotplug_sem);
static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device)
{
struct pcibus_info *pcibus_info;
int bricktype;
int bus_num;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
/* Check to see if this is a valid slot on 'pci_bus' */
if (!(pcibus_info->pbi_valid_devices & (1 << device)))
return -EPERM;
bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid);
bus_num = pcibus_info->pbi_buscommon.bs_persist_busnum & 0xf;
/* Do not allow hotplug operations on base I/O cards */
if ((bricktype == L1_BRICKTYPE_IX || bricktype == L1_BRICKTYPE_IA) &&
(bus_num == 1 && device != 1))
return -EPERM;
return 1;
}
static int sn_pci_bus_valid(struct pci_bus *pci_bus)
{
struct pcibus_info *pcibus_info;
int asic_type;
int bricktype;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
/* Don't register slots hanging off the TIOCA bus */
asic_type = pcibus_info->pbi_buscommon.bs_asic_type;
if (asic_type == PCIIO_ASIC_TYPE_TIOCA)
return -EPERM;
/* Only register slots in I/O Bricks that support hotplug */
bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid);
switch (bricktype) {
case L1_BRICKTYPE_IX:
case L1_BRICKTYPE_PX:
case L1_BRICKTYPE_IA:
case L1_BRICKTYPE_PA:
return 1;
break;
default:
return -EPERM;
break;
}
return -EIO;
}
static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
struct pci_bus *pci_bus, int device)
{
struct pcibus_info *pcibus_info;
struct slot *slot;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
bss_hotplug_slot->private = kcalloc(1, sizeof(struct slot),
GFP_KERNEL);
if (!bss_hotplug_slot->private)
return -ENOMEM;
slot = (struct slot *)bss_hotplug_slot->private;
bss_hotplug_slot->name = kmalloc(33, GFP_KERNEL);
if (!bss_hotplug_slot->name) {
kfree(bss_hotplug_slot->private);
return -ENOMEM;
}
slot->device_num = device;
slot->pci_bus = pci_bus;
sprintf(bss_hotplug_slot->name, "module_%c%c%c%c%.2d_b_%d_s_%d",
'0'+RACK_GET_CLASS(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
'0'+RACK_GET_GROUP(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
'0'+RACK_GET_NUM(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
MODULE_GET_BTCHAR(pcibus_info->pbi_moduleid),
MODULE_GET_BPOS(pcibus_info->pbi_moduleid),
((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf,
device + 1);
slot->hotplug_slot = bss_hotplug_slot;
list_add(&slot->hp_list, &sn_hp_list);
return 0;
}
static struct hotplug_slot * sn_hp_destroy(void)
{
struct slot *slot;
struct list_head *list;
struct hotplug_slot *bss_hotplug_slot = NULL;
list_for_each(list, &sn_hp_list) {
slot = list_entry(list, struct slot, hp_list);
bss_hotplug_slot = slot->hotplug_slot;
list_del(&((struct slot *)bss_hotplug_slot->private)->
hp_list);
break;
}
return bss_hotplug_slot;
}
static void sn_bus_alloc_data(struct pci_dev *dev)
{
struct list_head *node;
struct pci_bus *subordinate_bus;
struct pci_dev *child;
sn_pci_fixup_slot(dev);
/* Recursively sets up the sn_irq_info structs */
if (dev->subordinate) {
subordinate_bus = dev->subordinate;
list_for_each(node, &subordinate_bus->devices) {
child = list_entry(node, struct pci_dev, bus_list);
sn_bus_alloc_data(child);
}
}
}
static void sn_bus_free_data(struct pci_dev *dev)
{
struct list_head *node;
struct pci_bus *subordinate_bus;
struct pci_dev *child;
/* Recursively clean up sn_irq_info structs */
if (dev->subordinate) {
subordinate_bus = dev->subordinate;
list_for_each(node, &subordinate_bus->devices) {
child = list_entry(node, struct pci_dev, bus_list);
sn_bus_free_data(child);
}
}
sn_pci_unfixup_slot(dev);
}
static u8 sn_power_status_get(struct hotplug_slot *bss_hotplug_slot)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
u8 retval;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
retval = pcibus_info->pbi_enabled_devices & (1 << slot->device_num);
return retval ? 1 : 0;
}
static void sn_slot_mark_enable(struct hotplug_slot *bss_hotplug_slot,
int device_num)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
pcibus_info->pbi_enabled_devices |= (1 << device_num);
}
static void sn_slot_mark_disable(struct hotplug_slot *bss_hotplug_slot,
int device_num)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
pcibus_info->pbi_enabled_devices &= ~(1 << device_num);
}
static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
int device_num)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
struct pcibr_slot_enable_resp resp;
int rc;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
/*
* Power-on and initialize the slot in the SN
* PCI infrastructure.
*/
rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp);
if (rc == PCI_SLOT_ALREADY_UP) {
dev_dbg(slot->pci_bus->self, "is already active\n");
return -EPERM;
}
if (rc == PCI_L1_ERR) {
dev_dbg(slot->pci_bus->self,
"L1 failure %d with message: %s",
resp.resp_sub_errno, resp.resp_l1_msg);
return -EPERM;
}
if (rc) {
dev_dbg(slot->pci_bus->self,
"insert failed with error %d sub-error %d\n",
rc, resp.resp_sub_errno);
return -EIO;
}
sn_slot_mark_enable(bss_hotplug_slot, device_num);
return 0;
}
static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
int device_num, int action)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
struct pcibr_slot_disable_resp resp;
int rc;
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp);
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_SLOT_ALREADY_DOWN) {
dev_dbg(slot->pci_bus->self, "Slot %s already inactive\n");
return -ENODEV;
}
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_EMPTY_33MHZ) {
dev_dbg(slot->pci_bus->self,
"Cannot remove last 33MHz card\n");
return -EPERM;
}
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_L1_ERR) {
dev_dbg(slot->pci_bus->self,
"L1 failure %d with message \n%s\n",
resp.resp_sub_errno, resp.resp_l1_msg);
return -EPERM;
}
if (action == PCI_REQ_SLOT_ELIGIBLE && rc) {
dev_dbg(slot->pci_bus->self,
"remove failed with error %d sub-error %d\n",
rc, resp.resp_sub_errno);
return -EIO;
}
if (action == PCI_REQ_SLOT_ELIGIBLE && !rc)
return 0;
if (action == PCI_REQ_SLOT_DISABLE && !rc) {
sn_slot_mark_disable(bss_hotplug_slot, device_num);
dev_dbg(slot->pci_bus->self, "remove successful\n");
return 0;
}
if (action == PCI_REQ_SLOT_DISABLE && rc) {
dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc);
return rc;
}
return rc;
}
static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pci_bus *new_bus = NULL;
struct pci_dev *dev;
int func, num_funcs;
int new_ppb = 0;
int rc;
/* Serialize the Linux PCI infrastructure */
down(&sn_hotplug_sem);
/*
* Power-on and initialize the slot in the SN
* PCI infrastructure.
*/
rc = sn_slot_enable(bss_hotplug_slot, slot->device_num);
if (rc) {
up(&sn_hotplug_sem);
return rc;
}
num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1,
PCI_FUNC(0)));
if (!num_funcs) {
dev_dbg(slot->pci_bus->self, "no device in slot\n");
up(&sn_hotplug_sem);
return -ENODEV;
}
sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus),
slot->pci_bus->number,
slot->pci_bus);
/*
* Map SN resources for all functions on the card
* to the Linux PCI interface and tell the drivers
* about them.
*/
for (func = 0; func < num_funcs; func++) {
dev = pci_get_slot(slot->pci_bus,
PCI_DEVFN(slot->device_num + 1,
PCI_FUNC(func)));
if (dev) {
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
unsigned char sec_bus;
pci_read_config_byte(dev, PCI_SECONDARY_BUS,
&sec_bus);
new_bus = pci_add_new_bus(dev->bus, dev,
sec_bus);
pci_scan_child_bus(new_bus);
sn_pci_controller_fixup(pci_domain_nr(new_bus),
new_bus->number,
new_bus);
new_ppb = 1;
}
sn_bus_alloc_data(dev);
pci_dev_put(dev);
}
}
/* Call the driver for the new device */
pci_bus_add_devices(slot->pci_bus);
/* Call the drivers for the new devices subordinate to PPB */
if (new_ppb)
pci_bus_add_devices(new_bus);
up(&sn_hotplug_sem);
if (rc == 0)
dev_dbg(slot->pci_bus->self,
"insert operation successful\n");
else
dev_dbg(slot->pci_bus->self,
"insert operation failed rc = %d\n", rc);
return rc;
}
static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
{
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
struct pci_dev *dev;
int func;
int rc;
/* Acquire update access to the bus */
down(&sn_hotplug_sem);
/* is it okay to bring this slot down? */
rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
PCI_REQ_SLOT_ELIGIBLE);
if (rc)
goto leaving;
/* Free the SN resources assigned to the Linux device.*/
for (func = 0; func < 8; func++) {
dev = pci_get_slot(slot->pci_bus,
PCI_DEVFN(slot->device_num+1,
PCI_FUNC(func)));
if (dev) {
/*
* Some drivers may use dma accesses during the
* driver remove function. We release the sysdata
* areas after the driver remove functions have
* been called.
*/
sn_bus_store_sysdata(dev);
sn_bus_free_data(dev);
pci_remove_bus_device(dev);
pci_dev_put(dev);
}
}
/* free the collected sysdata pointers */
sn_bus_free_sysdata();
/* Deactivate slot */
rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
PCI_REQ_SLOT_DISABLE);
leaving:
/* Release the bus lock */
up(&sn_hotplug_sem);
return rc;
}
static int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value)
{
down(&sn_hotplug_sem);
*value = sn_power_status_get(bss_hotplug_slot);
up(&sn_hotplug_sem);
return 0;
}
static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot)
{
kfree(bss_hotplug_slot->info);
kfree(bss_hotplug_slot->name);
kfree(bss_hotplug_slot->private);
kfree(bss_hotplug_slot);
}
static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
{
int device;
struct hotplug_slot *bss_hotplug_slot;
int rc = 0;
/*
* Currently only four devices are supported,
* in the future there maybe more -- up to 32.
*/
for (device = 0; device < SN_MAX_HP_SLOTS ; device++) {
if (sn_pci_slot_valid(pci_bus, device) != 1)
continue;
bss_hotplug_slot = kcalloc(1,sizeof(struct hotplug_slot),
GFP_KERNEL);
if (!bss_hotplug_slot) {
rc = -ENOMEM;
goto alloc_err;
}
bss_hotplug_slot->info =
kcalloc(1,sizeof(struct hotplug_slot_info),
GFP_KERNEL);
if (!bss_hotplug_slot->info) {
rc = -ENOMEM;
goto alloc_err;
}
if (sn_hp_slot_private_alloc(bss_hotplug_slot,
pci_bus, device)) {
rc = -ENOMEM;
goto alloc_err;
}
bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
bss_hotplug_slot->release = &sn_release_slot;
rc = pci_hp_register(bss_hotplug_slot);
if (rc)
goto register_err;
}
dev_dbg(pci_bus->self, "Registered bus with hotplug\n");
return rc;
register_err:
dev_dbg(pci_bus->self, "bus failed to register with err = %d\n",
rc);
alloc_err:
if (rc == -ENOMEM)
dev_dbg(pci_bus->self, "Memory allocation error\n");
/* destroy THIS element */
if (bss_hotplug_slot)
sn_release_slot(bss_hotplug_slot);
/* destroy anything else on the list */
while ((bss_hotplug_slot = sn_hp_destroy()))
pci_hp_deregister(bss_hotplug_slot);
return rc;
}
static int sn_pci_hotplug_init(void)
{
struct pci_bus *pci_bus = NULL;
int rc;
int registered = 0;
INIT_LIST_HEAD(&sn_hp_list);
if (sn_sal_rev() < SGI_HOTPLUG_PROM_REV) {
printk(KERN_ERR "%s: PROM version must be greater than 4.05\n",
__FUNCTION__);
return -EPERM;
}
while ((pci_bus = pci_find_next_bus(pci_bus))) {
if (!pci_bus->sysdata)
continue;
rc = sn_pci_bus_valid(pci_bus);
if (rc != 1) {
dev_dbg(pci_bus->self, "not a valid hotplug bus\n");
continue;
}
dev_dbg(pci_bus->self, "valid hotplug bus\n");
rc = sn_hotplug_slot_register(pci_bus);
if (!rc)
registered = 1;
else {
registered = 0;
break;
}
}
return registered == 1 ? 0 : -ENODEV;
}
static void sn_pci_hotplug_exit(void)
{
struct hotplug_slot *bss_hotplug_slot;
while ((bss_hotplug_slot = sn_hp_destroy())) {
pci_hp_deregister(bss_hotplug_slot);
}
if (!list_empty(&sn_hp_list))
printk(KERN_ERR "%s: internal list is not empty\n", __FILE__);
}
module_init(sn_pci_hotplug_init);
module_exit(sn_pci_hotplug_exit);

4
include/asm-ia64/sn/pcibr_provider.h
View file

@ -151,4 +151,8 @@ extern void pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info);
extern int pcibr_ate_alloc(struct pcibus_info *, int);
extern void pcibr_ate_free(struct pcibus_info *, int);
extern void ate_write(struct pcibus_info *, int, int, uint64_t);
extern int sal_pcibr_slot_enable(struct pcibus_info *soft, int device,
void *resp);
extern int sal_pcibr_slot_disable(struct pcibus_info *soft, int device,
int action, void *resp);
#endif

6
include/asm-ia64/sn/pcidev.h
View file

@ -23,6 +23,8 @@
#define SN_PCIBUS_BUSSOFT(pci_bus) \
((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
/*
* Given a struct pci_dev, return the sn pcibus_bussoft struct. Note
* that this is not equivalent to SN_PCIBUS_BUSSOFT(pci_dev->bus) due
@ -56,6 +58,10 @@ struct 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 void sn_pci_controller_fixup(int segment, int busnum,
struct pci_bus *bus);
extern void sn_bus_store_sysdata(struct pci_dev *dev);
extern void sn_bus_free_sysdata(void);
extern void sn_pci_fixup_slot(struct pci_dev *dev);
extern void sn_pci_unfixup_slot(struct pci_dev *dev);
extern void sn_irq_lh_init(void);