[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>

4 files changed, 90 insertions, 30 deletions

diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 254fe15c064b..d8664715764b 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -183,11 +183,12 @@ int cx_driver_unregister(struct cx_drv *cx_driver)
  * @part_num: device's part number
  * @mfg_num: device's manufacturer number
  * @hubdev: hub info associated with this device
+ * @bt: board type of the device
  *
  */
 int
 cx_device_register(nasid_t nasid, int part_num, int mfg_num,
-                   struct hubdev_info *hubdev)
+                   struct hubdev_info *hubdev, int bt)
 {
         struct cx_dev *cx_dev;
 
@@ -200,6 +201,7 @@ cx_device_register(nasid_t nasid, int part_num, int mfg_num,
         cx_dev->cx_id.mfg_num = mfg_num;
         cx_dev->cx_id.nasid = nasid;
         cx_dev->hubdev = hubdev;
+        cx_dev->bt = bt;
 
         cx_dev->dev.parent = NULL;
         cx_dev->dev.bus = &tiocx_bus_type;
@@ -238,7 +240,8 @@ static int cx_device_reload(struct cx_dev *cx_dev)
 {
         cx_device_unregister(cx_dev);
         return cx_device_register(cx_dev->cx_id.nasid, cx_dev->cx_id.part_num,
-                                  cx_dev->cx_id.mfg_num, cx_dev->hubdev);
+                                  cx_dev->cx_id.mfg_num, cx_dev->hubdev,
+                                  cx_dev->bt);
 }
 
 static inline uint64_t tiocx_intr_alloc(nasid_t nasid, int widget,
@@ -365,26 +368,20 @@ static void tio_corelet_reset(nasid_t nasid, int corelet)
         udelay(2000);
 }
 
-static int tiocx_btchar_get(int nasid)
+static int is_fpga_tio(int nasid, int *bt)
 {
-        moduleid_t module_id;
-        geoid_t geoid;
-        int cnodeid;
-
-        cnodeid = nasid_to_cnodeid(nasid);
-        geoid = cnodeid_get_geoid(cnodeid);
-        module_id = geo_module(geoid);
-        return MODULE_GET_BTCHAR(module_id);
-}
+        int ioboard_type;
 
-static int is_fpga_brick(int nasid)
-{
-        switch (tiocx_btchar_get(nasid)) {
+        ioboard_type = ia64_sn_sysctl_ioboard_get(nasid);
+
+        switch (ioboard_type) {
         case L1_BRICKTYPE_SA:
         case L1_BRICKTYPE_ATHENA:
-        case L1_BRICKTYPE_DAYTONA:
+        case L1_BOARDTYPE_DAYTONA:
+                *bt = ioboard_type;
                 return 1;
         }
+
         return 0;
 }
 
@@ -407,16 +404,22 @@ static int tiocx_reload(struct cx_dev *cx_dev)
 
         if (bitstream_loaded(nasid)) {
                 uint64_t cx_id;
-
-                cx_id =
-                    *(volatile uint64_t *)(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
+                int rv;
+
+                rv = ia64_sn_sysctl_tio_clock_reset(nasid);
+                if (rv) {
+                        printk(KERN_ALERT "CX port JTAG reset failed.\n");
+                } else {
+                        cx_id = *(volatile uint64_t *)
+                                (TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
                                           WIDGET_ID);
-                part_num = XWIDGET_PART_NUM(cx_id);
-                mfg_num = XWIDGET_MFG_NUM(cx_id);
-                DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
-                /* just ignore it if it's a CE */
-                if (part_num == TIO_CE_ASIC_PARTNUM)
-                        return 0;
+                        part_num = XWIDGET_PART_NUM(cx_id);
+                        mfg_num = XWIDGET_MFG_NUM(cx_id);
+                        DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
+                        /* just ignore it if it's a CE */
+                        if (part_num == TIO_CE_ASIC_PARTNUM)
+                                return 0;
+                }
         }
 
         cx_dev->cx_id.part_num = part_num;
@@ -436,10 +439,10 @@ static ssize_t show_cxdev_control(struct device *dev, struct device_attribute *a
 {
         struct cx_dev *cx_dev = to_cx_dev(dev);
 
-        return sprintf(buf, "0x%x 0x%x 0x%x %d\n",
+        return sprintf(buf, "0x%x 0x%x 0x%x 0x%x\n",
                        cx_dev->cx_id.nasid,
                        cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num,
-                       tiocx_btchar_get(cx_dev->cx_id.nasid));
+                       cx_dev->bt);
 }
 
 static ssize_t store_cxdev_control(struct device *dev, struct device_attribute *attr, const char *buf,
@@ -488,11 +491,12 @@ static int __init tiocx_init(void)
 
         for (cnodeid = 0; cnodeid < MAX_COMPACT_NODES; cnodeid++) {
                 nasid_t nasid;
+                int bt;
 
                 if ((nasid = cnodeid_to_nasid(cnodeid)) < 0)
                         break;  /* No more nasids .. bail out of loop */
 
-                if ((nasid & 0x1) && is_fpga_brick(nasid)) {
+                if ((nasid & 0x1) && is_fpga_tio(nasid, &bt)) {
                         struct hubdev_info *hubdev;
                         struct xwidget_info *widgetp;
 
@@ -512,7 +516,7 @@ static int __init tiocx_init(void)
 
                         if (cx_device_register
                             (nasid, widgetp->xwi_hwid.part_num,
-                             widgetp->xwi_hwid.mfg_num, hubdev) < 0)
+                             widgetp->xwi_hwid.mfg_num, hubdev, bt) < 0)
                                 return -ENXIO;
                         else
                                 found_tiocx_device++;
diff --git a/include/asm-ia64/sn/l1.h b/include/asm-ia64/sn/l1.h
index 2e5f0aa38889..e3b819110d47 100644
--- a/include/asm-ia64/sn/l1.h
+++ b/include/asm-ia64/sn/l1.h
@@ -35,4 +35,16 @@
 #define L1_BRICKTYPE_ATHENA     0x2b            /* + */
 #define L1_BRICKTYPE_DAYTONA    0x7a            /* z */
 
+/* board type response codes */
+#define L1_BOARDTYPE_IP69       0x0100          /* CA */
+#define L1_BOARDTYPE_IP63       0x0200          /* CB */
+#define L1_BOARDTYPE_BASEIO     0x0300          /* IB */
+#define L1_BOARDTYPE_PCIE2SLOT  0x0400          /* IC */
+#define L1_BOARDTYPE_PCIX3SLOT  0x0500          /* ID */
+#define L1_BOARDTYPE_PCIXPCIE4SLOT 0x0600       /* IE */
+#define L1_BOARDTYPE_ABACUS     0x0700          /* AB */
+#define L1_BOARDTYPE_DAYTONA    0x0800          /* AD */
+#define L1_BOARDTYPE_INVAL      (-1)            /* invalid brick type */
+
+
 #endif /* _ASM_IA64_SN_L1_H */
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
diff --git a/include/asm-ia64/sn/tiocx.h b/include/asm-ia64/sn/tiocx.h
index c5447a504509..5699e75e5024 100644
--- a/include/asm-ia64/sn/tiocx.h
+++ b/include/asm-ia64/sn/tiocx.h
@@ -19,6 +19,7 @@ struct cx_id_s {
 
 struct cx_dev {
         struct cx_id_s cx_id;
+        int bt;                         /* board/blade type */
         void *soft;                     /* driver specific */
         struct hubdev_info *hubdev;
         struct device dev;
@@ -59,7 +60,7 @@ struct cx_drv {
 extern struct sn_irq_info *tiocx_irq_alloc(nasid_t, int, int, nasid_t, int);
 extern void tiocx_irq_free(struct sn_irq_info *);
 extern int cx_device_unregister(struct cx_dev *);
-extern int cx_device_register(nasid_t, int, int, struct hubdev_info *);
+extern int cx_device_register(nasid_t, int, int, struct hubdev_info *, int);
 extern int cx_driver_unregister(struct cx_drv *);
 extern int cx_driver_register(struct cx_drv *);
 extern uint64_t tiocx_dma_addr(uint64_t addr);