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authorPrarit Bhargava <prarit@sgi.com>2005-07-06 15:29:53 -0700
committerTony Luck <tony.luck@intel.com>2005-07-06 15:29:53 -0700
commit6f354b014b51716166f13f68b29212d3c44ed2c4 (patch)
tree396c09a5d519630a53652a1187bb85fceba82cee /arch
parent283c7f6ac6adb57e7dd13cdbc8d60b6ea4de6faf (diff)
[IA64] hotplug/ia64: SN Hotplug Driver - SN Hotplug Driver code
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/sn/kernel/io_init.c134
-rw-r--r--arch/ia64/sn/kernel/irq.c6
-rw-r--r--arch/ia64/sn/pci/pcibr/pcibr_provider.c37
3 files changed, 129 insertions, 48 deletions
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 041c4be02b2..a67f39e448c 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -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;
};
@@ -137,23 +145,6 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
}
/*
- * 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,
- (u64) ia64_tpa(&prom_bussoft_ptr));
- if (status > 0) {
- return; /* bus # does not exist */
- }
-
+ 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);
+ controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
+ if (!controller)
+ BUG();
+
if (bus == NULL) {
- return; /* error, or bus already scanned */
+ 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);
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index cf4dbf9645f..84d276a14ec 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -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);
}
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index 9bc4de4a3ec..9813da56d31 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -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);