[IA64] Altix patch for fpga reset

1) workaround a h/w reset issue
2) to improve the determination of FPGA-based h/w in
   the arch/ia64/sn/kernel/tiocx code.

Signed-off-by: Bruce Losure <blosure@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/asm-ia64/sn/sn_sal.h b/include/asm-ia64/sn/sn_sal.h
index e67825ad1930..6f96ae8b4fbe 100644
--- a/include/asm-ia64/sn/sn_sal.h
+++ b/include/asm-ia64/sn/sn_sal.h
@@ -47,6 +47,7 @@
 #define  SN_SAL_CONSOLE_PUTB                       0x02000028
 #define  SN_SAL_CONSOLE_XMIT_CHARS                 0x0200002a
 #define  SN_SAL_CONSOLE_READC                      0x0200002b
+#define  SN_SAL_SYSCTL_OP                          0x02000030
 #define  SN_SAL_SYSCTL_MODID_GET                   0x02000031
 #define  SN_SAL_SYSCTL_GET                         0x02000032
 #define  SN_SAL_SYSCTL_IOBRICK_MODULE_GET          0x02000033
@@ -98,6 +99,13 @@
 #define SAL_INTR_FREE           2
 
 /*
+ * operations available on the generic SN_SAL_SYSCTL_OP
+ * runtime service
+ */
+#define SAL_SYSCTL_OP_IOBOARD           0x0001  /*  retrieve board type */
+#define SAL_SYSCTL_OP_TIO_JLCK_RST      0x0002  /* issue TIO clock reset */
+
+/*
  * IRouter (i.e. generalized system controller) operations
  */
 #define SAL_IROUTER_OPEN        0       /* open a subchannel */
@@ -876,6 +884,41 @@ ia64_sn_sysctl_event_init(nasid_t nasid)
         return (int) rv.v0;
 }
 
+/*
+ * Ask the system controller on the specified nasid to reset
+ * the CX corelet clock.  Only valid on TIO nodes.
+ */
+static inline int
+ia64_sn_sysctl_tio_clock_reset(nasid_t nasid)
+{
+        struct ia64_sal_retval rv;
+        SAL_CALL_REENTRANT(rv, SN_SAL_SYSCTL_OP, SAL_SYSCTL_OP_TIO_JLCK_RST,
+                        nasid, 0, 0, 0, 0, 0);
+        if (rv.status != 0)
+                return (int)rv.status;
+        if (rv.v0 != 0)
+                return (int)rv.v0;
+
+        return 0;
+}
+
+/*
+ * Get the associated ioboard type for a given nasid.
+ */
+static inline int
+ia64_sn_sysctl_ioboard_get(nasid_t nasid)
+{
+        struct ia64_sal_retval rv;
+        SAL_CALL_REENTRANT(rv, SN_SAL_SYSCTL_OP, SAL_SYSCTL_OP_IOBOARD,
+                        nasid, 0, 0, 0, 0, 0);
+        if (rv.v0 != 0)
+                return (int)rv.v0;
+        if (rv.v1 != 0)
+                return (int)rv.v1;
+
+        return 0;
+}
+
 /**
  * ia64_sn_get_fit_compt - read a FIT entry from the PROM header
  * @nasid: NASID of node to read