sgi-xp: isolate remote copy buffer to sn2 only

Make the remote copy buffer an sn2 only item.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 30 deletions

diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
index defd08881184..2111723553bf 100644
--- a/drivers/misc/sgi-xp/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -151,26 +151,6 @@ struct xpc_vars_sn2 {
 #define XPC_V_VERSION _XPC_VERSION(3, 1)    /* version 3.1 of the cross vars */
 
 /*
- * The following pertains to ia64-sn2 only.
- *
- * Memory for XPC's amo variables is allocated by the MSPEC driver. These
- * pages are located in the lowest granule. The lowest granule uses 4k pages
- * for cached references and an alternate TLB handler to never provide a
- * cacheable mapping for the entire region. This will prevent speculative
- * reading of cached copies of our lines from being issued which will cause
- * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
- * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS) to identify
- * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
- * partitions (i.e., XPCs) consider themselves currently engaged with the
- * local XPC and 1 amo variable to request partition deactivation.
- */
-#define XPC_NOTIFY_IRQ_AMOS     0
-#define XPC_ACTIVATE_IRQ_AMOS   (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2)
-#define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
-#define XPC_DEACTIVATE_REQUEST_AMO  (XPC_ENGAGED_PARTITIONS_AMO + 1)
-
-/*
  * The following structure describes the per partition specific variables.
  *
  * An array of these structures, one per partition, will be defined. As a
@@ -214,9 +194,10 @@ struct xpc_vars_part_sn2 {
 #define XPC_RP_VARS_SIZE        L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
 
 #define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE))
-#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS(_rp)        ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \
-                                    xp_nasid_mask_words))
+#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xpc_nasid_mask_words)
+#define XPC_RP_VARS(_rp)        ((struct xpc_vars_sn2 *) \
+                                 (XPC_RP_MACH_NASIDS(_rp) + \
+                                  xpc_nasid_mask_words))
 
 /*
  * Functions registered by add_timer() or called by kernel_thread() only
@@ -225,11 +206,11 @@ struct xpc_vars_part_sn2 {
  * the passed argument.
  */
 #define XPC_PACK_ARGS(_arg1, _arg2) \
-                        ((((u64) _arg1) & 0xffffffff) | \
-                        ((((u64) _arg2) & 0xffffffff) << 32))
+                        ((((u64)_arg1) & 0xffffffff) | \
+                        ((((u64)_arg2) & 0xffffffff) << 32))
 
-#define XPC_UNPACK_ARG1(_args)  (((u64) _args) & 0xffffffff)
-#define XPC_UNPACK_ARG2(_args)  ((((u64) _args) >> 32) & 0xffffffff)
+#define XPC_UNPACK_ARG1(_args)  (((u64)_args) & 0xffffffff)
+#define XPC_UNPACK_ARG2(_args)  ((((u64)_args) >> 32) & 0xffffffff)
 
 /*
  * Define a Get/Put value pair (pointers) used with a message queue.
@@ -710,12 +691,10 @@ extern void xpc_exit_uv(void);
 
 /* found in xpc_partition.c */
 extern int xpc_exiting;
-extern int xp_nasid_mask_words;
+extern int xpc_nasid_mask_words;
 extern struct xpc_rsvd_page *xpc_rsvd_page;
 extern u64 *xpc_mach_nasids;
 extern struct xpc_partition *xpc_partitions;
-extern char *xpc_remote_copy_buffer;
-extern void *xpc_remote_copy_buffer_base;
 extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
 extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
 extern int xpc_identify_activate_IRQ_sender(void);