Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

1 files changed, 54 insertions, 6 deletions

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 233d55115d33..a4c78152b336 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -10,6 +10,7 @@
 #include <linux/nodemask.h>
 #include <asm/sn/types.h>
 #include <asm/sn/addrs.h>
+#include <asm/sn/sn_feature_sets.h>
 #include <asm/sn/geo.h>
 #include <asm/sn/io.h>
 #include <asm/sn/pcibr_provider.h>
@@ -165,8 +166,46 @@ sn_pcidev_info_get(struct pci_dev *dev)
         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 s64 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);
+
+        return isrv.status;
+}
+
 /*
- * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for 
+ * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
  *      each node in the system.
  */
 static void sn_fixup_ionodes(void)
@@ -242,12 +281,21 @@ static void sn_fixup_ionodes(void)
                                 memset(dev_entry->common, 0x0, sizeof(struct
                                                        sn_flush_device_common));
 
-                                status = sal_get_device_dmaflush_list(nasid,
-                                                                        widget,
-                                                                        device,
+                                if (sn_prom_feature_available(
+                                                       PRF_DEVICE_FLUSH_LIST))
+                                        status = sal_get_device_dmaflush_list(
+                                                                          nasid,
+                                                                         widget,
+                                                                         device,
                                                       (u64)(dev_entry->common));
-                                if (status)
-                                        BUG();
+                                else
+                                        status = sn_device_fixup_war(nasid,
+                                                                     widget,
+                                                                     device,
+                                                             dev_entry->common);
+                                if (status != SALRET_OK)
+                                        panic("SAL call failed: %s\n",
+                                              ia64_sal_strerror(status));
 
                                 spin_lock_init(&dev_entry->sfdl_flush_lock);
                         }