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sgi-xp: prepare xpc_rsvd_page to work on either sn2 or uv hardware

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Prepare XPC's reserved page header to work for either sn2 or uv.

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 908787db9b
commit 94bd2708d4
7 changed files with 268 additions and 134 deletions
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57
drivers/misc/sgi-xp/xpc.h
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@ -71,11 +71,11 @@
*
* reserved page header
*
* The first cacheline of the reserved page contains the header
* (struct xpc_rsvd_page). Before SAL initialization has completed,
* The first two 64-byte cachelines of the reserved page contain the
* header (struct xpc_rsvd_page). Before SAL initialization has completed,
* SAL has set up the following fields of the reserved page header:
* SAL_signature, SAL_version, partid, and nasids_size. The other
* fields are set up by XPC. (xpc_rsvd_page points to the local
* SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The
* other fields are set up by XPC. (xpc_rsvd_page points to the local
* partition's reserved page.)
*
* part_nasids mask
@ -89,11 +89,11 @@
* nasids. The part_nasids mask is located starting at the first cacheline
* following the reserved page header. The mach_nasids mask follows right
* after the part_nasids mask. The size in bytes of each mask is reflected
* by the reserved page header field 'nasids_size'. (Local partition's
* by the reserved page header field 'SAL_nasids_size'. (Local partition's
* mask pointers are xpc_part_nasids and xpc_mach_nasids.)
*
* vars
* vars part
* vars (ia64-sn2 only)
* vars part (ia64-sn2 only)
*
* Immediately following the mach_nasids mask are the XPC variables
* required by other partitions. First are those that are generic to all
@ -101,25 +101,31 @@
* which are partition specific (vars part). These are setup by XPC.
* (Local partition's vars pointers are xpc_vars and xpc_vars_part.)
*
* Note: Until vars_pa is set, the partition XPC code has not been initialized.
* Note: Until 'stamp' is set non-zero, the partition XPC code has not been
* initialized.
*/
struct xpc_rsvd_page {
u64 SAL_signature; /* SAL: unique signature */
u64 SAL_version; /* SAL: version */
u8 partid; /* SAL: partition ID */
short SAL_partid; /* SAL: partition ID */
short max_npartitions; /* value of XPC_MAX_PARTITIONS */
u8 version;
u8 pad1[6]; /* align to next u64 in cacheline */
u64 vars_pa; /* physical address of struct xpc_vars */
u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */
union {
u64 vars_pa; /* physical address of struct xpc_vars */
u64 activate_mq_gpa; /* global phys address of activate_mq */
} sn;
struct timespec stamp; /* time when reserved page was setup by XPC */
u64 pad2[9]; /* align to last u64 in cacheline */
u64 nasids_size; /* SAL: size of each nasid mask in bytes */
u64 pad2[9]; /* align to last u64 in 2nd 64-byte cacheline */
u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */
};
#define XPC_RP_VERSION _XPC_VERSION(1, 1) /* version 1.1 of the reserved page */
#define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */
#define XPC_SUPPORTS_RP_STAMP(_version) \
(_version >= _XPC_VERSION(1, 1))
#define ZERO_STAMP ((struct timespec){0, 0})
/*
* compare stamps - the return value is:
*
@ -218,10 +224,10 @@ xpc_disallow_hb(short partid, struct xpc_vars *vars)
*
* An array of these structures, one per partition, will be defined. As a
* partition becomes active XPC will copy the array entry corresponding to
* itself from that partition. It is desirable that the size of this
* structure evenly divide into a cacheline, such that none of the entries
* in this array crosses a cacheline boundary. As it is now, each entry
* occupies half a cacheline.
* itself from that partition. It is desirable that the size of this structure
* evenly divides into a 128-byte cacheline, such that none of the entries in
* this array crosses a 128-byte cacheline boundary. As it is now, each entry
* occupies a 64-byte cacheline.
*/
struct xpc_vars_part {
u64 magic;
@ -632,16 +638,25 @@ extern void xpc_activate_kthreads(struct xpc_channel *, int);
extern void xpc_create_kthreads(struct xpc_channel *, int, int);
extern void xpc_disconnect_wait(int);
extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *);
/* found in xpc_sn2.c */
extern void xpc_init_sn2(void);
extern struct xpc_vars *xpc_vars; /*>>> eliminate from here */
extern struct xpc_vars_part *xpc_vars_part; /*>>> eliminate from here */
/* found in xpc_uv.c */
extern void xpc_init_uv(void);
/* found in xpc_partition.c */
extern int xpc_exiting;
extern struct xpc_vars *xpc_vars;
extern int xp_nasid_mask_words;
extern struct xpc_rsvd_page *xpc_rsvd_page;
extern struct xpc_vars_part *xpc_vars_part;
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_rsvd_page_init(void);
extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
extern void xpc_allow_IPI_ops(void);
extern void xpc_restrict_IPI_ops(void);
extern int xpc_identify_act_IRQ_sender(void);