[IA64-SGI] Altix SN add support for slots in geoid_t locator

This patch against ia64-test-2.6.12 is needed for forthcoming
Altix chipsets. It renames geoid_any_t to geoid_common_t and
splits the 8bit 'slab' field into two 4bit fields for 'slab'
and 'slot'. Similar changes in the Altix SAL will retain backward
compatibility for old kernels.

Signed-off-by: Mark Goodwin <markgw@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/sn/kernel/sn2/sn_hwperf.c

@@ -116,7 +116,7 @@ static int sn_hwperf_geoid_to_cnode(char *location)
 		module_id = geo_module(geoid);
 		this_rack = MODULE_GET_RACK(module_id);
 		this_bay = MODULE_GET_BPOS(module_id);
-		this_slot = 0; /* XXX */
+		this_slot = geo_slot(geoid);
 		this_slab = geo_slab(geoid);
 		if (rack == this_rack && bay == this_bay &&
 			slot == this_slot && slab == this_slab) {
@@ -176,20 +176,27 @@ static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj,
 
 static void print_pci_topology(struct seq_file *s,
 	struct sn_hwperf_object_info *obj, int *ordinal,
-	char *pci_topo_buf, int len)
+	u64 rack, u64 bay, u64 slot, u64 slab)
 {
 	char *p1;
 	char *p2;
+	char *pg;
 
-	for (p1=pci_topo_buf; *p1 && p1 < pci_topo_buf + len;) {
-		if (!(p2 = strchr(p1, '\n')))
-			break;
-		*p2 = '\0';
-		seq_printf(s, "pcibus %d %s-%s\n",
-			*ordinal, obj->location, p1);
-		(*ordinal)++;
-		p1 = p2 + 1;
+	if (!(pg = (char *)get_zeroed_page(GFP_KERNEL)))
+		return; /* ignore */
+	if (ia64_sn_ioif_get_pci_topology(rack, bay, slot, slab,
+		__pa(pg), PAGE_SIZE) == SN_HWPERF_OP_OK) {
+		for (p1=pg; *p1 && p1 < pg + PAGE_SIZE;) {
+			if (!(p2 = strchr(p1, '\n')))
+				break;
+			*p2 = '\0';
+			seq_printf(s, "pcibus %d %s-%s\n",
+				*ordinal, obj->location, p1);
+			(*ordinal)++;
+			p1 = p2 + 1;
+		}
 	}
+	free_page((unsigned long)pg);
 }
 
 static int sn_topology_show(struct seq_file *s, void *d)
@@ -218,9 +225,7 @@ static int sn_topology_show(struct seq_file *s, void *d)
 	u8 region_size;
 	u16 nasid_mask;
 	int nasid_msb;
-	char *pci_topo_buf;
 	int pci_bus_ordinal = 0;
-	static int pci_topo_buf_len = 256;
 
 	if (obj == objs) {
 		seq_printf(s, "# sn_topology version 2\n");
@@ -299,41 +304,13 @@ static int sn_topology_show(struct seq_file *s, void *d)
 		/*
 		 * PCI busses attached to this node, if any
 		 */
-		do {
-			if (sn_hwperf_location_to_bpos(obj->location,
-				&rack, &bay, &slot, &slab)) {
-				break;
-			}
+		if (sn_hwperf_location_to_bpos(obj->location,
+			&rack, &bay, &slot, &slab)) {
+			/* export pci bus info */
+			print_pci_topology(s, obj, &pci_bus_ordinal,
+				rack, bay, slot, slab);
 
-			if (!(pci_topo_buf = vmalloc(pci_topo_buf_len))) {
-				printk("sn_topology_show: vmalloc failed\n");
-				break;
-			}
-
-			e = ia64_sn_ioif_get_pci_topology(rack, bay, slot, slab,
-			    	pci_topo_buf, pci_topo_buf_len);
-
-			switch (e) {
-			case SALRET_NOT_IMPLEMENTED:
-			case SALRET_INVALID_ARG:
-				/* ignore, don't print anything */
-				e = SN_HWPERF_OP_OK;
-				break;
-
-			case SALRET_ERROR:
-				/* retry with a bigger buffer */ 
-				pci_topo_buf_len += 256;
-				break;
-
-			case SN_HWPERF_OP_OK:
-			default:
-				/* export pci bus info */
-				print_pci_topology(s, obj, &pci_bus_ordinal,
-					pci_topo_buf, pci_topo_buf_len);
-				break;
-			}
-			vfree(pci_topo_buf);
-		} while (e != SN_HWPERF_OP_OK && pci_topo_buf_len < 0x200000);
+		}
 	}
 
 	if (obj->ports) {

include/asm-ia64/sn/geo.h

@@ -18,32 +18,34 @@
 #define GEOID_SIZE	8	/* Would 16 be better?  The size can
 				   be different on different platforms. */
 
-#define MAX_SLABS	0xe	/* slabs per module */
+#define MAX_SLOTS	0xf	/* slots per module */
+#define MAX_SLABS	0xf	/* slabs per slot */
 
 typedef unsigned char	geo_type_t;
 
 /* Fields common to all substructures */
-typedef struct geo_any_s {
+typedef struct geo_common_s {
     moduleid_t	module;		/* The module (box) this h/w lives in */
     geo_type_t	type;		/* What type of h/w is named by this geoid_t */
-    slabid_t	slab;		/* The logical assembly within the module */
-} geo_any_t;
+    slabid_t	slab:4;		/* slab (ASIC), 0 .. 15 within slot */
+    slotid_t	slot:4;		/* slot (Blade), 0 .. 15 within module */
+} geo_common_t;
 
 /* Additional fields for particular types of hardware */
 typedef struct geo_node_s {
-    geo_any_t	any;		/* No additional fields needed */
+    geo_common_t	common;		/* No additional fields needed */
 } geo_node_t;
 
 typedef struct geo_rtr_s {
-    geo_any_t	any;		/* No additional fields needed */
+    geo_common_t	common;		/* No additional fields needed */
 } geo_rtr_t;
 
 typedef struct geo_iocntl_s {
-    geo_any_t	any;		/* No additional fields needed */
+    geo_common_t	common;		/* No additional fields needed */
 } geo_iocntl_t;
 
 typedef struct geo_pcicard_s {
-    geo_iocntl_t	any;
+    geo_iocntl_t	common;
     char		bus;	/* Bus/widget number */
     char		slot;	/* PCI slot number */
 } geo_pcicard_t;
@@ -62,14 +64,14 @@ typedef struct geo_mem_s {
 
 
 typedef union geoid_u {
-    geo_any_t	any;
-    geo_node_t	node;
+    geo_common_t	common;
+    geo_node_t		node;
     geo_iocntl_t	iocntl;
     geo_pcicard_t	pcicard;
-    geo_rtr_t	rtr;
-    geo_cpu_t	cpu;
-    geo_mem_t	mem;
-    char	padsize[GEOID_SIZE];
+    geo_rtr_t		rtr;
+    geo_cpu_t		cpu;
+    geo_mem_t		mem;
+    char		padsize[GEOID_SIZE];
 } geoid_t;
 
 
@@ -104,19 +106,26 @@ typedef union geoid_u {
 #define INVALID_CNODEID         ((cnodeid_t)-1)
 #define INVALID_PNODEID         ((pnodeid_t)-1)
 #define INVALID_SLAB            (slabid_t)-1
+#define INVALID_SLOT            (slotid_t)-1
 #define INVALID_MODULE          ((moduleid_t)-1)
 #define INVALID_PARTID          ((partid_t)-1)
 
 static inline slabid_t geo_slab(geoid_t g)
 {
-	return (g.any.type == GEO_TYPE_INVALID) ?
-		INVALID_SLAB : g.any.slab;
+	return (g.common.type == GEO_TYPE_INVALID) ?
+		INVALID_SLAB : g.common.slab;
+}
+
+static inline slotid_t geo_slot(geoid_t g)
+{
+	return (g.common.type == GEO_TYPE_INVALID) ?
+		INVALID_SLOT : g.common.slot;
 }
 
 static inline moduleid_t geo_module(geoid_t g)
 {
-	return (g.any.type == GEO_TYPE_INVALID) ?
-		INVALID_MODULE : g.any.module;
+	return (g.common.type == GEO_TYPE_INVALID) ?
+		INVALID_MODULE : g.common.module;
 }
 
 extern geoid_t cnodeid_get_geoid(cnodeid_t cnode);

include/asm-ia64/sn/sn_sal.h

@@ -74,10 +74,10 @@
 #define  SN_SAL_IOIF_GET_PCIBUS_INFO		   0x02000056
 #define  SN_SAL_IOIF_GET_PCIDEV_INFO		   0x02000057
 #define  SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST	   0x02000058
-#define  SN_SAL_IOIF_GET_PCI_TOPOLOGY	           0x02000059
 
 #define SN_SAL_HUB_ERROR_INTERRUPT		   0x02000060
 #define SN_SAL_BTE_RECOVER			   0x02000061
+#define SN_SAL_IOIF_GET_PCI_TOPOLOGY	           0x02000062
 
 /*
  * Service-specific constants
@@ -1015,7 +1015,7 @@ ia64_sn_hwperf_op(nasid_t nasid, u64 opcode, u64 a0, u64 a1, u64 a2,
 
 static inline int
 ia64_sn_ioif_get_pci_topology(u64 rack, u64 bay, u64 slot, u64 slab,
-			      char *buf, u64 len)
+			      u64 buf, u64 len)
 {
 	struct ia64_sal_retval rv;
 	SAL_CALL_NOLOCK(rv, SN_SAL_IOIF_GET_PCI_TOPOLOGY,

include/asm-ia64/sn/types.h

@@ -16,7 +16,8 @@ typedef signed short	nasid_t;	/* node id in numa-as-id space */
 typedef signed char	partid_t;	/* partition ID type */
 typedef unsigned int    moduleid_t;     /* user-visible module number type */
 typedef unsigned int    cmoduleid_t;    /* kernel compact module id type */
-typedef signed char     slabid_t;
+typedef unsigned char	slotid_t;	/* slot (blade) within module */
+typedef unsigned char	slabid_t;	/* slab (asic) within slot */
 typedef u64 nic_t;
 typedef unsigned long iopaddr_t;
 typedef unsigned long paddr_t;