[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>

diff --git a/arch/ia64/sn/kernel/bte_error.c b/arch/ia64/sn/kernel/bte_error.c
index fd10431..fcbc748 100644 (file)
--- 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 2bdf684..5c39b43 100644 (file)
--- 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;
 }

diff --git a/include/asm-ia64/sn/sn_sal.h b/include/asm-ia64/sn/sn_sal.h
index 410d356..581f9a7 100644 (file)
--- a/include/asm-ia64/sn/sn_sal.h
+++ b/include/asm-ia64/sn/sn_sal.h
@@ -8,7 +8,7 @@
  * 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.
  */
 
 
@@ -77,7 +77,7 @@
 #define  SN_SAL_IOIF_GET_PCI_TOPOLOGY             0x02000059
 
 #define SN_SAL_HUB_ERROR_INTERRUPT                0x02000060
-
+#define SN_SAL_BTE_RECOVER                        0x02000061
 
 /*
  * Service-specific constants
@@ -1023,4 +1023,19 @@ ia64_sn_ioif_get_pci_topology(u64 rack, u64 bay, u64 slot, u64 slab,
        return (int) rv.status;
 }
 
+/*
+ * BTE error recovery is implemented in SAL
+ */
+static inline int
+ia64_sn_bte_recovery(nasid_t nasid)
+{
+       struct ia64_sal_retval rv;
+
+       rv.status = 0;
+       SAL_CALL_NOLOCK(rv, SN_SAL_BTE_RECOVER, 0, 0, 0, 0, 0, 0, 0);
+       if (rv.status == SALRET_NOT_IMPLEMENTED)
+               return 0;
+       return (int) rv.status;
+}
+
 #endif /* _ASM_IA64_SN_SN_SAL_H */