[IA64-SGI] Shub2 BTE support - BTE recovery code

patch 2:
	Shub2 BTE recovery code will be implemented in SAL.  
	Define the SAL interface.
	Modify bte_error to call SAL for shub2.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 54 insertions, 31 deletions

diff --git a/arch/ia64/sn/kernel/bte_error.c b/arch/ia64/sn/kernel/bte_error.c
index fd104312c6bd..fcbc748ae433 100644
--- a/arch/ia64/sn/kernel/bte_error.c
+++ b/arch/ia64/sn/kernel/bte_error.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 #include <linux/types.h>
@@ -33,48 +33,28 @@ void bte_error_handler(unsigned long);
  * Wait until all BTE related CRBs are completed
  * and then reset the interfaces.
  */
-void bte_error_handler(unsigned long _nodepda)
+void shub1_bte_error_handler(unsigned long _nodepda)
 {
         struct nodepda_s *err_nodepda = (struct nodepda_s *)_nodepda;
-        spinlock_t *recovery_lock = &err_nodepda->bte_recovery_lock;
         struct timer_list *recovery_timer = &err_nodepda->bte_recovery_timer;
         nasid_t nasid;
         int i;
         int valid_crbs;
-        unsigned long irq_flags;
-        volatile u64 *notify;
-        bte_result_t bh_error;
         ii_imem_u_t imem;       /* II IMEM Register */
         ii_icrb0_d_u_t icrbd;   /* II CRB Register D */
         ii_ibcr_u_t ibcr;
         ii_icmr_u_t icmr;
         ii_ieclr_u_t ieclr;
 
-        BTE_PRINTK(("bte_error_handler(%p) - %d\n", err_nodepda,
+        BTE_PRINTK(("shub1_bte_error_handler(%p) - %d\n", err_nodepda,
                     smp_processor_id()));
 
-        spin_lock_irqsave(recovery_lock, irq_flags);
-
         if ((err_nodepda->bte_if[0].bh_error == BTE_SUCCESS) &&
             (err_nodepda->bte_if[1].bh_error == BTE_SUCCESS)) {
                 BTE_PRINTK(("eh:%p:%d Nothing to do.\n", err_nodepda,
                             smp_processor_id()));
-                spin_unlock_irqrestore(recovery_lock, irq_flags);
                 return;
         }
-        /*
-         * Lock all interfaces on this node to prevent new transfers
-         * from being queued.
-         */
-        for (i = 0; i < BTES_PER_NODE; i++) {
-                if (err_nodepda->bte_if[i].cleanup_active) {
-                        continue;
-                }
-                spin_lock(&err_nodepda->bte_if[i].spinlock);
-                BTE_PRINTK(("eh:%p:%d locked %d\n", err_nodepda,
-                            smp_processor_id(), i));
-                err_nodepda->bte_if[i].cleanup_active = 1;
-        }
 
         /* Determine information about our hub */
         nasid = cnodeid_to_nasid(err_nodepda->bte_if[0].bte_cnode);
@@ -101,7 +81,6 @@ void bte_error_handler(unsigned long _nodepda)
                 mod_timer(recovery_timer, HZ * 5);
                 BTE_PRINTK(("eh:%p:%d Marked Giving up\n", err_nodepda,
                             smp_processor_id()));
-                spin_unlock_irqrestore(recovery_lock, irq_flags);
                 return;
         }
         if (icmr.ii_icmr_fld_s.i_crb_vld != 0) {
@@ -120,8 +99,6 @@ void bte_error_handler(unsigned long _nodepda)
                                 BTE_PRINTK(("eh:%p:%d Valid %d, Giving up\n",
                                             err_nodepda, smp_processor_id(),
                                             i));
-                                spin_unlock_irqrestore(recovery_lock,
-                                                       irq_flags);
                                 return;
                         }
                 }
@@ -146,6 +123,51 @@ void bte_error_handler(unsigned long _nodepda)
         ibcr.ii_ibcr_fld_s.i_soft_reset = 1;
         REMOTE_HUB_S(nasid, IIO_IBCR, ibcr.ii_ibcr_regval);
 
+        del_timer(recovery_timer);
+}
+
+/*
+ * Wait until all BTE related CRBs are completed
+ * and then reset the interfaces.
+ */
+void bte_error_handler(unsigned long _nodepda)
+{
+        struct nodepda_s *err_nodepda = (struct nodepda_s *)_nodepda;
+        spinlock_t *recovery_lock = &err_nodepda->bte_recovery_lock;
+        int i;
+        nasid_t nasid;
+        unsigned long irq_flags;
+        volatile u64 *notify;
+        bte_result_t bh_error;
+
+        BTE_PRINTK(("bte_error_handler(%p) - %d\n", err_nodepda,
+                    smp_processor_id()));
+
+        spin_lock_irqsave(recovery_lock, irq_flags);
+
+        /*
+         * Lock all interfaces on this node to prevent new transfers
+         * from being queued.
+         */
+        for (i = 0; i < BTES_PER_NODE; i++) {
+                if (err_nodepda->bte_if[i].cleanup_active) {
+                        continue;
+                }
+                spin_lock(&err_nodepda->bte_if[i].spinlock);
+                BTE_PRINTK(("eh:%p:%d locked %d\n", err_nodepda,
+                            smp_processor_id(), i));
+                err_nodepda->bte_if[i].cleanup_active = 1;
+        }
+
+        if (is_shub1()) {
+                shub1_bte_error_handler(_nodepda);
+        } else {
+                nasid = cnodeid_to_nasid(err_nodepda->bte_if[0].bte_cnode);
+
+                if (ia64_sn_bte_recovery(nasid))
+                        panic("bte_error_handler(): Fatal BTE Error");
+        }
+
         for (i = 0; i < BTES_PER_NODE; i++) {
                 bh_error = err_nodepda->bte_if[i].bh_error;
                 if (bh_error != BTE_SUCCESS) {
@@ -165,8 +187,6 @@ void bte_error_handler(unsigned long _nodepda)
                 spin_unlock(&err_nodepda->bte_if[i].spinlock);
         }
 
-        del_timer(recovery_timer);
-
         spin_unlock_irqrestore(recovery_lock, irq_flags);
 }
 
diff --git a/arch/ia64/sn/kernel/huberror.c b/arch/ia64/sn/kernel/huberror.c
index 2bdf684c5066..5c39b43ba3c0 100644
--- a/arch/ia64/sn/kernel/huberror.c
+++ b/arch/ia64/sn/kernel/huberror.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000,2002-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000,2002-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/types.h>
@@ -38,8 +38,11 @@ static irqreturn_t hub_eint_handler(int irq, void *arg, struct pt_regs *ep)
         if ((int)ret_stuff.v0)
                 panic("hubii_eint_handler(): Fatal TIO Error");
 
-        if (!(nasid & 1)) /* Not a TIO, handle CRB errors */
-                (void)hubiio_crb_error_handler(hubdev_info);
+        if (is_shub1()) {
+                if (!(nasid & 1)) /* Not a TIO, handle CRB errors */
+                        (void)hubiio_crb_error_handler(hubdev_info);
+        } else 
+                bte_error_handler((unsigned long)NODEPDA(nasid_to_cnodeid(nasid)));
 
         return IRQ_HANDLED;
 }