x86: uv: xpc needs to provide an abstraction for uv_gpa

Provide an SGI SN2/UV agnositic method for converting a global physical
address into a socket physical address.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-xp/xp.h

@@ -339,6 +339,7 @@ extern short xp_partition_id;
 extern u8 xp_region_size;
 
 extern unsigned long (*xp_pa) (void *);
+extern unsigned long (*xp_socket_pa) (unsigned long);
 extern enum xp_retval (*xp_remote_memcpy) (unsigned long, const unsigned long,
 		       size_t);
 extern int (*xp_cpu_to_nasid) (int);

drivers/misc/sgi-xp/xp_main.c

@@ -44,6 +44,9 @@ EXPORT_SYMBOL_GPL(xp_region_size);
 unsigned long (*xp_pa) (void *addr);
 EXPORT_SYMBOL_GPL(xp_pa);
 
+unsigned long (*xp_socket_pa) (unsigned long gpa);
+EXPORT_SYMBOL_GPL(xp_socket_pa);
+
 enum xp_retval (*xp_remote_memcpy) (unsigned long dst_gpa,
 				    const unsigned long src_gpa, size_t len);
 EXPORT_SYMBOL_GPL(xp_remote_memcpy);

drivers/misc/sgi-xp/xp_sn2.c

@@ -83,6 +83,15 @@ xp_pa_sn2(void *addr)
 	return __pa(addr);
 }
 
+/*
+ * Convert a global physical to a socket physical address.
+ */
+static unsigned long
+xp_socket_pa_sn2(unsigned long gpa)
+{
+	return gpa;
+}
+
 /*
  * Wrapper for bte_copy().
  *
@@ -162,6 +171,7 @@ xp_init_sn2(void)
 	xp_region_size = sn_region_size;
 
 	xp_pa = xp_pa_sn2;
+	xp_socket_pa = xp_socket_pa_sn2;
 	xp_remote_memcpy = xp_remote_memcpy_sn2;
 	xp_cpu_to_nasid = xp_cpu_to_nasid_sn2;
 	xp_expand_memprotect = xp_expand_memprotect_sn2;

drivers/misc/sgi-xp/xp_uv.c

@@ -32,6 +32,15 @@ xp_pa_uv(void *addr)
 	return uv_gpa(addr);
 }
 
+/*
+ * Convert a global physical to socket physical address.
+ */
+static unsigned long
+xp_socket_pa_uv(unsigned long gpa)
+{
+	return uv_gpa_to_soc_phys_ram(gpa);
+}
+
 static enum xp_retval
 xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
 		    size_t len)
@@ -123,6 +132,7 @@ xp_init_uv(void)
 	xp_region_size = sn_region_size;
 
 	xp_pa = xp_pa_uv;
+	xp_socket_pa = xp_socket_pa_uv;
 	xp_remote_memcpy = xp_remote_memcpy_uv;
 	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
 	xp_expand_memprotect = xp_expand_memprotect_uv;