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sgi-xp: replace AMO_t typedef by struct amo 

Replace the AMO_t typedef by a direct reference to 'struct amo'.

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 22:34:11 -07:00 committed by Linus Torvalds
parent 7fb5e59d63
commit c39838ce21
5 changed files with 101 additions and 96 deletions
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2
drivers/misc/sgi-xp/xp_sn2.c
View File

@ -32,7 +32,7 @@ EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
* If the PIO read times out, the MCA handler will consume the error and
* return to a kernel-provided instruction to indicate an error. This PIO read
* exists because it is guaranteed to timeout if the destination is down
* (AMO operations do not timeout on at least some CPUs on Shubs <= v1.2,
* (amo operations do not timeout on at least some CPUs on Shubs <= v1.2,
* which unfortunately we have to work around).
*/
static enum xp_retval

24
drivers/misc/sgi-xp/xpc.h
View File

@ -38,8 +38,8 @@
/*
* The next macros define word or bit representations for given
* C-brick nasid in either the SAL provided bit array representing
* nasids in the partition/machine or the AMO_t array used for
* inter-partition initiation communications.
* nasids in the partition/machine or the array of amo structures used
* for inter-partition initiation communications.
*
* For SN2 machines, C-Bricks are alway even numbered NASIDs. As
* such, some space will be saved by insisting that nasid information
@ -144,8 +144,8 @@ struct xpc_vars_sn2 {
int activate_IRQ_nasid;
int activate_IRQ_phys_cpuid;
u64 vars_part_pa;
u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */
AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */
u64 amos_page_pa; /* paddr of page of amos from MSPEC driver */
struct amo *amos_page; /* vaddr of page of amos from MSPEC driver */
};
#define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */
@ -153,17 +153,17 @@ struct xpc_vars_sn2 {
/*
* The following pertains to ia64-sn2 only.
*
* Memory for XPC's AMO variables is allocated by the MSPEC driver. These
* 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
* 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.
* 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)
@ -186,7 +186,7 @@ struct xpc_vars_part_sn2 {
u64 openclose_args_pa; /* physical address of open and close args */
u64 GPs_pa; /* physical address of Get/Put values */
u64 chctl_amo_pa; /* physical address of chctl flags' AMO_t */
u64 chctl_amo_pa; /* physical address of chctl flags' amo */
int notify_IRQ_nasid; /* nasid of where to send notify IRQs */
int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */
@ -547,8 +547,8 @@ struct xpc_partition_sn2 {
int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */
char notify_IRQ_owner[8]; /* notify IRQ's owner's name */
AMO_t *remote_chctl_amo_va; /* address of remote chctl flags' AMO_t */
AMO_t *local_chctl_amo_va; /* address of chctl flags' AMO_t */
struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */
struct amo *local_chctl_amo_va; /* address of chctl flags' amo */
struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */
};

16
drivers/misc/sgi-xp/xpc_main.c
View File

@ -26,16 +26,16 @@
* Caveats:
*
* . Currently on sn2, we have no way to determine which nasid an IRQ
* came from. Thus, xpc_send_IRQ_sn2() does a remote AMO write
* followed by an IPI. The AMO indicates where data is to be pulled
* from, so after the IPI arrives, the remote partition checks the AMO
* word. The IPI can actually arrive before the AMO however, so other
* code must periodically check for this case. Also, remote AMO
* came from. Thus, xpc_send_IRQ_sn2() does a remote amo write
* followed by an IPI. The amo indicates where data is to be pulled
* from, so after the IPI arrives, the remote partition checks the amo
* word. The IPI can actually arrive before the amo however, so other
* code must periodically check for this case. Also, remote amo
* operations do not reliably time out. Thus we do a remote PIO read
* solely to know whether the remote partition is down and whether we
* should stop sending IPIs to it. This remote PIO read operation is
* set up in a special nofault region so SAL knows to ignore (and
* cleanup) any errors due to the remote AMO write, PIO read, and/or
* cleanup) any errors due to the remote amo write, PIO read, and/or
* PIO write operations.
*
* If/when new hardware solves this IPI problem, we should abandon
@ -302,7 +302,7 @@ xpc_hb_checker(void *ignore)
/*
* We need to periodically recheck to ensure no
* IRQ/AMO pairs have been missed. That check
* IRQ/amo pairs have been missed. That check
* must always reset xpc_hb_check_timeout.
*/
force_IRQ = 1;
@ -1034,7 +1034,7 @@ xpc_init(void)
if (is_shub()) {
/*
* The ia64-sn2 architecture supports at most 64 partitions.
* And the inability to unregister remote AMOs restricts us
* And the inability to unregister remote amos restricts us
* further to only support exactly 64 partitions on this
* architecture, no less.
*/

139
drivers/misc/sgi-xp/xpc_sn2.c
View File

@ -111,13 +111,14 @@ xpc_disallow_IPI_ops_sn2(void)
*/
static u64
xpc_receive_IRQ_amo_sn2(AMO_t *amo)
xpc_receive_IRQ_amo_sn2(struct amo *amo)
{
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
}
static enum xp_retval
xpc_send_IRQ_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
xpc_send_IRQ_sn2(struct amo *amo, u64 flag, int nasid, int phys_cpuid,
int vector)
{
int ret = 0;
unsigned long irq_flags;
@ -131,7 +132,7 @@ xpc_send_IRQ_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
* keep sending IRQs and AMOs to it until the heartbeat times out.
* keep sending IRQs and amos to it until the heartbeat times out.
*/
ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
xp_nofault_PIOR_target));
@ -141,12 +142,12 @@ xpc_send_IRQ_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
return ((ret == 0) ? xpSuccess : xpPioReadError);
}
static AMO_t *
static struct amo *
xpc_init_IRQ_amo_sn2(int index)
{
AMO_t *amo = xpc_vars->amos_page + index;
struct amo *amo = xpc_vars->amos_page + index;
(void)xpc_receive_IRQ_amo_sn2(amo); /* clear AMO variable */
(void)xpc_receive_IRQ_amo_sn2(amo); /* clear amo variable */
return amo;
}
@ -166,7 +167,7 @@ xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
}
/*
* Flag the appropriate AMO variable and send an IRQ to the specified node.
* Flag the appropriate amo variable and send an IRQ to the specified node.
*/
static void
xpc_send_activate_IRQ_sn2(u64 amos_page_pa, int from_nasid, int to_nasid,
@ -174,8 +175,9 @@ xpc_send_activate_IRQ_sn2(u64 amos_page_pa, int from_nasid, int to_nasid,
{
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
AMO_t *amos = (AMO_t *)__va(amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
struct amo *amos = (struct amo *)__va(amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS *
sizeof(struct amo)));
(void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid,
to_phys_cpuid, SGI_XPC_ACTIVATE);
@ -186,8 +188,9 @@ xpc_send_local_activate_IRQ_sn2(int from_nasid)
{
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
AMO_t *amos = (AMO_t *)__va(xpc_vars->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
struct amo *amos = (struct amo *)__va(xpc_vars->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS *
sizeof(struct amo)));
/* fake the sending and receipt of an activate IRQ from remote nasid */
FETCHOP_STORE_OP(TO_AMO((u64)&amos[w_index].variable), FETCHOP_OR,
@ -227,7 +230,7 @@ xpc_check_for_sent_chctl_flags_sn2(struct xpc_partition *part)
/*
* Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
* partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
* than one partition, we use an AMO_t structure per partition to indicate
* than one partition, we use an amo structure per partition to indicate
* whether a partition has sent an IRQ or not. If it has, then wake up the
* associated kthread to handle it.
*
@ -391,20 +394,20 @@ static void
xpc_indicate_partition_engaged_sn2(struct xpc_partition *part)
{
unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO *
sizeof(AMO_t)));
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags);
/* set bit corresponding to our partid in remote partition's AMO */
/* set bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
(1UL << sn_partition_id));
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
* keep sending IRQs and AMOs to it until the heartbeat times out.
* keep sending IRQs and amos to it until the heartbeat times out.
*/
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable),
@ -418,20 +421,20 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part_sn2->remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO *
sizeof(AMO_t)));
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags);
/* clear bit corresponding to our partid in remote partition's AMO */
/* clear bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << sn_partition_id));
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
* keep sending IRQs and AMOs to it until the heartbeat times out.
* keep sending IRQs and amos to it until the heartbeat times out.
*/
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable),
@ -441,7 +444,7 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
/*
* Send activate IRQ to get other side to see that we've cleared our
* bit in their engaged partitions AMO.
* bit in their engaged partitions amo.
*/
xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
cnodeid_to_nasid(0),
@ -452,9 +455,9 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
static int
xpc_partition_engaged_sn2(short partid)
{
AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
/* our partition's AMO variable ANDed with partid mask */
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
(1UL << partid)) != 0;
}
@ -462,18 +465,18 @@ xpc_partition_engaged_sn2(short partid)
static int
xpc_any_partition_engaged_sn2(void)
{
AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
/* our partition's AMO variable */
/* our partition's amo variable */
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
}
static void
xpc_assume_partition_disengaged_sn2(short partid)
{
AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
/* clear bit(s) based on partid mask in our partition's AMO */
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << partid));
}
@ -482,10 +485,10 @@ xpc_assume_partition_disengaged_sn2(short partid)
static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
/*
* Change protections to allow AMO operations on non-Shub 1.1 systems.
* Change protections to allow amo operations on non-Shub 1.1 systems.
*/
static enum xp_retval
xpc_allow_AMO_ops_sn2(AMO_t *amos_page)
xpc_allow_amo_ops_sn2(struct amo *amos_page)
{
u64 nasid_array = 0;
int ret;
@ -493,7 +496,7 @@ xpc_allow_AMO_ops_sn2(AMO_t *amos_page)
/*
* On SHUB 1.1, we cannot call sn_change_memprotect() since the BIST
* collides with memory operations. On those systems we call
* xpc_allow_AMO_ops_shub_wars_1_1_sn2() instead.
* xpc_allow_amo_ops_shub_wars_1_1_sn2() instead.
*/
if (!enable_shub_wars_1_1()) {
ret = sn_change_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE,
@ -506,10 +509,10 @@ xpc_allow_AMO_ops_sn2(AMO_t *amos_page)
}
/*
* Change protections to allow AMO operations on Shub 1.1 systems.
* Change protections to allow amo operations on Shub 1.1 systems.
*/
static void
xpc_allow_AMO_ops_shub_wars_1_1_sn2(void)
xpc_allow_amo_ops_shub_wars_1_1_sn2(void)
{
int node;
int nasid;
@ -536,7 +539,7 @@ xpc_allow_AMO_ops_shub_wars_1_1_sn2(void)
static enum xp_retval
xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
{
AMO_t *amos_page;
struct amo *amos_page;
int i;
int ret;
@ -549,32 +552,32 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
XPC_RP_VARS_SIZE);
/*
* Before clearing xpc_vars, see if a page of AMOs had been previously
* Before clearing xpc_vars, see if a page of amos had been previously
* allocated. If not we'll need to allocate one and set permissions
* so that cross-partition AMOs are allowed.
* so that cross-partition amos are allowed.
*
* The allocated AMO page needs MCA reporting to remain disabled after
* The allocated amo page needs MCA reporting to remain disabled after
* XPC has unloaded. To make this work, we keep a copy of the pointer
* to this page (i.e., amos_page) in the struct xpc_vars structure,
* which is pointed to by the reserved page, and re-use that saved copy
* on subsequent loads of XPC. This AMO page is never freed, and its
* on subsequent loads of XPC. This amo page is never freed, and its
* memory protections are never restricted.
*/
amos_page = xpc_vars->amos_page;
if (amos_page == NULL) {
amos_page = (AMO_t *)TO_AMO(uncached_alloc_page(0, 1));
amos_page = (struct amo *)TO_AMO(uncached_alloc_page(0, 1));
if (amos_page == NULL) {
dev_err(xpc_part, "can't allocate page of AMOs\n");
dev_err(xpc_part, "can't allocate page of amos\n");
return xpNoMemory;
}
/*
* Open up AMO-R/W to cpu. This is done on Shub 1.1 systems
* when xpc_allow_AMO_ops_shub_wars_1_1_sn2() is called.
* Open up amo-R/W to cpu. This is done on Shub 1.1 systems
* when xpc_allow_amo_ops_shub_wars_1_1_sn2() is called.
*/
ret = xpc_allow_AMO_ops_sn2(amos_page);
ret = xpc_allow_amo_ops_sn2(amos_page);
if (ret != xpSuccess) {
dev_err(xpc_part, "can't allow AMO operations\n");
dev_err(xpc_part, "can't allow amo operations\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1);
return ret;
@ -595,11 +598,11 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part_sn2) *
xp_max_npartitions);
/* initialize the activate IRQ related AMO variables */
/* initialize the activate IRQ related amo variables */
for (i = 0; i < xp_nasid_mask_words; i++)
(void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS + i);
/* initialize the engaged remote partitions related AMO variables */
/* initialize the engaged remote partitions related amo variables */
(void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO);
(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO);
@ -745,19 +748,20 @@ xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part_sn2->remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO * sizeof(AMO_t)));
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags);
/* set bit corresponding to our partid in remote partition's AMO */
/* set bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
(1UL << sn_partition_id));
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
* keep sending IRQs and AMOs to it until the heartbeat times out.
* keep sending IRQs and amos to it until the heartbeat times out.
*/
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable),
@ -767,7 +771,7 @@ xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
/*
* Send activate IRQ to get other side to see that we've set our
* bit in their deactivate request AMO.
* bit in their deactivate request amo.
*/
xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
cnodeid_to_nasid(0),
@ -779,19 +783,20 @@ static void
xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
{
unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO * sizeof(AMO_t)));
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags);
/* clear bit corresponding to our partid in remote partition's AMO */
/* clear bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << sn_partition_id));
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
* keep sending IRQs and AMOs to it until the heartbeat times out.
* keep sending IRQs and amos to it until the heartbeat times out.
*/
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable),
@ -803,9 +808,9 @@ xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
static int
xpc_partition_deactivation_requested_sn2(short partid)
{
AMO_t *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO;
struct amo *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO;
/* our partition's AMO variable ANDed with partid mask */
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
(1UL << partid)) != 0;
}
@ -976,7 +981,7 @@ xpc_identify_activate_IRQ_req_sn2(int nasid)
}
/*
* Loop through the activation AMO variables and process any bits
* Loop through the activation amo variables and process any bits
* which are set. Each bit indicates a nasid sending a partition
* activation or deactivation request.
*
@ -989,11 +994,11 @@ xpc_identify_activate_IRQ_sender_sn2(void)
u64 nasid_mask;
u64 nasid; /* remote nasid */
int n_IRQs_detected = 0;
AMO_t *act_amos;
struct amo *act_amos;
act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
/* scan through act AMO variable looking for non-zero entries */
/* scan through act amo variable looking for non-zero entries */
for (word = 0; word < xp_nasid_mask_words; word++) {
if (xpc_exiting)
@ -1005,7 +1010,7 @@ xpc_identify_activate_IRQ_sender_sn2(void)
continue;
}
dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", word,
nasid_mask);
/*
@ -1038,7 +1043,7 @@ xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected)
n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) {
/* retry once to help avoid missing AMO */
/* retry once to help avoid missing amo */
(void)xpc_identify_activate_IRQ_sender_sn2();
}
}
@ -1386,7 +1391,7 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
part_sn2->remote_openclose_args_pa =
pulled_entry->openclose_args_pa;
part_sn2->remote_chctl_amo_va =
(AMO_t *)__va(pulled_entry->chctl_amo_pa);
(struct amo *)__va(pulled_entry->chctl_amo_pa);
part_sn2->notify_IRQ_nasid = pulled_entry->notify_IRQ_nasid;
part_sn2->notify_IRQ_phys_cpuid =
pulled_entry->notify_IRQ_phys_cpuid;
@ -1417,7 +1422,7 @@ xpc_make_first_contact_sn2(struct xpc_partition *part)
enum xp_retval ret;
/*
* Register the remote partition's AMOs with SAL so it can handle
* Register the remote partition's amos with SAL so it can handle
* and cleanup errors within that address range should the remote
* partition go down. We don't unregister this range because it is
* difficult to tell when outstanding writes to the remote partition
@ -2192,9 +2197,9 @@ xpc_init_sn2(void)
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;
/* open up protections for IPI and [potentially] AMO operations */
/* open up protections for IPI and [potentially] amo operations */
xpc_allow_IPI_ops_sn2();
xpc_allow_AMO_ops_shub_wars_1_1_sn2();
xpc_allow_amo_ops_shub_wars_1_1_sn2();
/*
* This is safe to do before the xpc_hb_checker thread has started

16
include/asm-ia64/sn/mspec.h
View File

@ -4,7 +4,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved.
* Copyright (c) 2001-2008 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_IA64_SN_MSPEC_H
@ -32,26 +32,26 @@
#ifdef __KERNEL__
/*
* Each Atomic Memory Operation (AMO formerly known as fetchop)
* Each Atomic Memory Operation (amo, formerly known as fetchop)
* variable is 64 bytes long. The first 8 bytes are used. The
* remaining 56 bytes are unaddressable due to the operation taking
* that portion of the address.
*
* NOTE: The AMO_t _MUST_ be placed in either the first or second half
* of the cache line. The cache line _MUST NOT_ be used for anything
* other than additional AMO_t entries. This is because there are two
* NOTE: The amo structure _MUST_ be placed in either the first or second
* half of the cache line. The cache line _MUST NOT_ be used for anything
* other than additional amo entries. This is because there are two
* addresses which reference the same physical cache line. One will
* be a cached entry with the memory type bits all set. This address
* may be loaded into processor cache. The AMO_t will be referenced
* may be loaded into processor cache. The amo will be referenced
* uncached via the memory special memory type. If any portion of the
* cached cache-line is modified, when that line is flushed, it will
* overwrite the uncached value in physical memory and lead to
* inconsistency.
*/
typedef struct {
struct amo {
u64 variable;
u64 unused[7];
} AMO_t;
};
#endif /* __KERNEL__ */