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sgi-xp: create a common xp_remote_memcpy() function

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Create a common remote memcpy function that maps to what the hardware
booted supports.

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>
This commit is contained in:
Dean Nelson
2008-07-29 22:34:05 -07:00
committed by Linus Torvalds
parent bc63d387e4
commit 908787db9b
8 changed files with 107 additions and 106 deletions
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43
drivers/misc/sgi-xp/xp.h
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@@ -17,7 +17,6 @@
#include <linux/hardirq.h>
#include <linux/mutex.h>
#include <asm/sn/types.h>
#include <asm/sn/bte.h>
#ifdef CONFIG_IA64
#include <asm/sn/arch.h>
#endif
@@ -71,46 +70,6 @@
#define XP_NASID_MASK_BYTES ((XP_MAX_PHYSNODE_ID + 7) / 8)
#define XP_NASID_MASK_WORDS ((XP_MAX_PHYSNODE_ID + 63) / 64)
/*
* Wrapper for bte_copy() that should it return a failure status will retry
* the bte_copy() once in the hope that the failure was due to a temporary
* aberration (i.e., the link going down temporarily).
*
* src - physical address of the source of the transfer.
* vdst - virtual address of the destination of the transfer.
* len - number of bytes to transfer from source to destination.
* mode - see bte_copy() for definition.
* notification - see bte_copy() for definition.
*
* Note: xp_bte_copy() should never be called while holding a spinlock.
*/
static inline bte_result_t
xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
{
bte_result_t ret;
u64 pdst = ia64_tpa(vdst);
/*
* Ensure that the physically mapped memory is contiguous.
*
* We do this by ensuring that the memory is from region 7 only.
* If the need should arise to use memory from one of the other
* regions, then modify the BUG_ON() statement to ensure that the
* memory from that region is always physically contiguous.
*/
BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
ret = bte_copy(src, pdst, len, mode, notification);
if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
if (!in_interrupt())
cond_resched();
ret = bte_copy(src, pdst, len, mode, notification);
}
return ret;
}
/*
* XPC establishes channel connections between the local partition and any
* other partition that is currently up. Over these channels, kernel-level
@@ -408,6 +367,8 @@ xpc_partid_to_nasids(short partid, void *nasids)
extern short xp_max_npartitions;
extern enum xp_retval (*xp_remote_memcpy) (void *, const void *, size_t);
extern u64 xp_nofault_PIOR_target;
extern int xp_nofault_PIOR(void *);
extern int xp_error_PIOR(void);