[IA64-SGI] Add PROM feature set for device flush list

Introduce PRF_DEVICE_FLUSH_LIST flag for older PROMs.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 18 insertions, 18 deletions

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 00700f7e6837..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>
@@ -173,8 +174,8 @@ sn_pcidev_info_get(struct pci_dev *dev)
  */
 static u8 war_implemented = 0;
 
-static void sn_device_fixup_war(u64 nasid, u64 widget, int device,
-                                struct sn_flush_device_common *common)
+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;
@@ -198,8 +199,9 @@ static void sn_device_fixup_war(u64 nasid, u64 widget, int device,
 
         dev_entry = war_list + device;
         memcpy(common,dev_entry, sizeof(*common));
-
         kfree(war_list);
+
+        return isrv.status;
 }
 
 /*
@@ -279,23 +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) {
-                                        if (sn_sal_rev() < 0x0450) {
-                                                /* shortlived WAR for older
-                                                 * PROM images
-                                                 */
-                                                sn_device_fixup_war(nasid,
-                                                                    widget,
-                                                                    device,
+                                else
+                                        status = sn_device_fixup_war(nasid,
+                                                                     widget,
+                                                                     device,
                                                              dev_entry->common);
-                                        }
-                                        else
-                                                BUG();
-                                }
+                                if (status != SALRET_OK)
+                                        panic("SAL call failed: %s\n",
+                                              ia64_sal_strerror(status));
 
                                 spin_lock_init(&dev_entry->sfdl_flush_lock);
                         }