[IA64-SGI] Altix only: Add PCI Domain number support.

This patch enables PCI Domain numbering on Altix.

Signed-off-by: Colin Ngam <cngam@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/sn/include/xtalk/hubdev.h b/arch/ia64/sn/include/xtalk/hubdev.h
index 580a1c0..ca4e250 100644 (file)
--- a/arch/ia64/sn/include/xtalk/hubdev.h
+++ b/arch/ia64/sn/include/xtalk/hubdev.h
@@ -34,7 +34,8 @@ struct sn_flush_device_list {
        unsigned long sfdl_force_int_addr;
        unsigned long sfdl_flush_value;
        volatile unsigned long *sfdl_flush_addr;
-       uint64_t sfdl_persistent_busnum;
+       uint32_t sfdl_persistent_busnum;
+       uint32_t sfdl_persistent_segment;
        struct pcibus_info *sfdl_pcibus_info;
        spinlock_t sfdl_flush_lock;
 };
@@ -58,7 +59,8 @@ struct hubdev_info {
 
        void                            *hdi_nodepda;
        void                            *hdi_node_vertex;
-       void                            *hdi_xtalk_vertex;
+       uint32_t                        max_segment_number;
+       uint32_t                        max_pcibus_number;
 };
 
 extern void hubdev_init_node(nodepda_t *, cnodeid_t);

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index a6649ba..829ea79 100644 (file)
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -44,6 +44,9 @@ 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
  */
@@ -157,13 +160,28 @@ static void sn_fixup_ionodes(void)
        uint64_t nasid;
        int i, widget;
 
+       /*
+        * Get SGI Specific HUB chipset information.
+        * Inform Prom that this kernel can support domain bus numbering.
+        */
        for (i = 0; i < numionodes; 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, (uint64_t) __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);
@@ -229,7 +247,7 @@ void sn_pci_unfixup_slot(struct pci_dev *dev)
 void sn_pci_fixup_slot(struct pci_dev *dev)
 {
        int idx;
-       int segment = 0;
+       int segment = pci_domain_nr(dev->bus);
        int status = 0;
        struct pcibus_bussoft *bs;
        struct pci_bus *host_pci_bus;
@@ -282,9 +300,9 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
         * PCI host_pci_dev struct and set up host bus linkages
         */
 
-       bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
+       bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
        devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
-       host_pci_bus = pci_find_bus(pci_domain_nr(dev->bus), bus_no);
+       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;
@@ -332,6 +350,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
        prom_bussoft_ptr = __va(prom_bussoft_ptr);
 
        controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
+       controller->segment = segment;
        if (!controller)
                BUG();
 
@@ -387,7 +406,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
        if (controller->node >= num_online_nodes()) {
                struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 
-               printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%lu"
+               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);
@@ -442,6 +461,7 @@ sn_sysdata_free_start:
 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
@@ -476,8 +496,9 @@ static int __init sn_pci_init(void)
 #endif
 
        /* busses are not known yet ... */
-       for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
-               sn_pci_controller_fixup(0, i, NULL);
+       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 

diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index b95e928..dfaf01e 100644 (file)
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -60,7 +60,7 @@ static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
        ret_stuff.status = 0;
        ret_stuff.v0 = 0;
 
-       segment = 0;
+       segment = soft->pbi_buscommon.bs_persist_segment;
        busnum = soft->pbi_buscommon.bs_persist_busnum;
        SAL_CALL_NOLOCK(ret_stuff,
                        (u64) SN_SAL_IOIF_ERROR_INTERRUPT,
@@ -142,9 +142,12 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
                             j++, sn_flush_device_list++) {
                                if (sn_flush_device_list->sfdl_slot == -1)
                                        continue;
-                               if (sn_flush_device_list->
-                                   sfdl_persistent_busnum ==
-                                   soft->pbi_buscommon.bs_persist_busnum)
+                               if ((sn_flush_device_list->
+                                    sfdl_persistent_segment ==
+                                    soft->pbi_buscommon.bs_persist_segment) &&
+                                    (sn_flush_device_list->
+                                    sfdl_persistent_busnum ==
+                                    soft->pbi_buscommon.bs_persist_busnum))
                                        sn_flush_device_list->sfdl_pcibus_info =
                                            soft;
                        }

diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c
index 5d76a75..2fef7c1 100644 (file)
--- a/arch/ia64/sn/pci/tioca_provider.c
+++ b/arch/ia64/sn/pci/tioca_provider.c
@@ -559,7 +559,7 @@ tioca_error_intr_handler(int irq, void *arg, struct pt_regs *pt)
        ret_stuff.status = 0;
        ret_stuff.v0 = 0;
 
-       segment = 0;
+       segment = soft->ca_common.bs_persist_segment;
        busnum = soft->ca_common.bs_persist_busnum;
 
        SAL_CALL_NOLOCK(ret_stuff,
@@ -622,7 +622,8 @@ tioca_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
            nasid_to_cnodeid(tioca_common->ca_closest_nasid);
        tioca_common->ca_kernel_private = (uint64_t) tioca_kern;
 
-       bus = pci_find_bus(0, tioca_common->ca_common.bs_persist_busnum);
+       bus = pci_find_bus(tioca_common->ca_common.bs_persist_segment,
+               tioca_common->ca_common.bs_persist_busnum);
        BUG_ON(!bus);
        tioca_kern->ca_devices = &bus->devices;
 

diff --git a/include/asm-ia64/sn/pcibus_provider_defs.h b/include/asm-ia64/sn/pcibus_provider_defs.h
index 976f5ef..b01b21e 100644 (file)
--- a/include/asm-ia64/sn/pcibus_provider_defs.h
+++ b/include/asm-ia64/sn/pcibus_provider_defs.h
@@ -30,7 +30,8 @@
 struct pcibus_bussoft {
        uint32_t                bs_asic_type;   /* chipset type */
        uint32_t                bs_xid;         /* xwidget id */
-       uint64_t                bs_persist_busnum; /* Persistent Bus Number */
+       uint32_t                bs_persist_busnum; /* Persistent Bus Number */
+       uint32_t                bs_persist_segment; /* Segment Number */
        uint64_t                bs_legacy_io;   /* legacy io pio addr */
        uint64_t                bs_legacy_mem;  /* legacy mem pio addr */
        uint64_t                bs_base;        /* widget base */