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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 * 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 * 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 * 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). * which unfortunately we have to work around).
*/ */
static enum xp_retval 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 * The next macros define word or bit representations for given
* C-brick nasid in either the SAL provided bit array representing * C-brick nasid in either the SAL provided bit array representing
* nasids in the partition/machine or the AMO_t array used for * nasids in the partition/machine or the array of amo structures used
* inter-partition initiation communications. * for inter-partition initiation communications.
* *
* For SN2 machines, C-Bricks are alway even numbered NASIDs. As * For SN2 machines, C-Bricks are alway even numbered NASIDs. As
* such, some space will be saved by insisting that nasid information * 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_nasid;
int activate_IRQ_phys_cpuid; int activate_IRQ_phys_cpuid;
u64 vars_part_pa; u64 vars_part_pa;
u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */ u64 amos_page_pa; /* paddr of page of amos from MSPEC driver */
AMO_t *amos_page; /* vaddr 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 */ #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. * 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 * 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 * for cached references and an alternate TLB handler to never provide a
* cacheable mapping for the entire region. This will prevent speculative * cacheable mapping for the entire region. This will prevent speculative
* reading of cached copies of our lines from being issued which will cause * 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 * 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 * 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 * 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 * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
* partitions (i.e., XPCs) consider themselves currently engaged with the * 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_NOTIFY_IRQ_AMOS 0
#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2) #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 openclose_args_pa; /* physical address of open and close args */
u64 GPs_pa; /* physical address of Get/Put values */ 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_nasid; /* nasid of where to send notify IRQs */
int notify_IRQ_phys_cpuid; /* CPUID 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 */ int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */
char notify_IRQ_owner[8]; /* notify IRQ's owner's name */ char notify_IRQ_owner[8]; /* notify IRQ's owner's name */
AMO_t *remote_chctl_amo_va; /* address of remote chctl flags' AMO_t */ struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */
AMO_t *local_chctl_amo_va; /* address of chctl flags' AMO_t */ struct amo *local_chctl_amo_va; /* address of chctl flags' amo */
struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */ 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: * Caveats:
* *
* . Currently on sn2, we have no way to determine which nasid an IRQ * . 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 * 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 * 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 * from, so after the IPI arrives, the remote partition checks the amo
* word. The IPI can actually arrive before the AMO however, so other * word. The IPI can actually arrive before the amo however, so other
* code must periodically check for this case. Also, remote AMO * code must periodically check for this case. Also, remote amo
* operations do not reliably time out. Thus we do a remote PIO read * 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 * solely to know whether the remote partition is down and whether we
* should stop sending IPIs to it. This remote PIO read operation is * 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 * 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. * PIO write operations.
* *
* If/when new hardware solves this IPI problem, we should abandon * 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 * 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. * must always reset xpc_hb_check_timeout.
*/ */
force_IRQ = 1; force_IRQ = 1;
@ -1034,7 +1034,7 @@ xpc_init(void)
if (is_shub()) { if (is_shub()) {
/* /*
* The ia64-sn2 architecture supports at most 64 partitions. * 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 * further to only support exactly 64 partitions on this
* architecture, no less. * 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 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); return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
} }
static enum xp_retval 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; int ret = 0;
unsigned long irq_flags; 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 * 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 * 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 * 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), ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
xp_nofault_PIOR_target)); 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); return ((ret == 0) ? xpSuccess : xpPioReadError);
} }
static AMO_t * static struct amo *
xpc_init_IRQ_amo_sn2(int index) 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; 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 static void
xpc_send_activate_IRQ_sn2(u64 amos_page_pa, int from_nasid, int to_nasid, 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 w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid); int b_index = XPC_NASID_B_INDEX(from_nasid);
AMO_t *amos = (AMO_t *)__va(amos_page_pa + struct amo *amos = (struct amo *)__va(amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t))); (XPC_ACTIVATE_IRQ_AMOS *
sizeof(struct amo)));
(void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid, (void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid,
to_phys_cpuid, SGI_XPC_ACTIVATE); 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 w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid); int b_index = XPC_NASID_B_INDEX(from_nasid);
AMO_t *amos = (AMO_t *)__va(xpc_vars->amos_page_pa + struct amo *amos = (struct amo *)__va(xpc_vars->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t))); (XPC_ACTIVATE_IRQ_AMOS *
sizeof(struct amo)));
/* fake the sending and receipt of an activate IRQ from remote nasid */ /* fake the sending and receipt of an activate IRQ from remote nasid */
FETCHOP_STORE_OP(TO_AMO((u64)&amos[w_index].variable), FETCHOP_OR, 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 * 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 * 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 * whether a partition has sent an IRQ or not. If it has, then wake up the
* associated kthread to handle it. * associated kthread to handle it.
* *
@ -391,20 +394,20 @@ static void
xpc_indicate_partition_engaged_sn2(struct xpc_partition *part) xpc_indicate_partition_engaged_sn2(struct xpc_partition *part)
{ {
unsigned long irq_flags; unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part->sn.sn2.remote_amos_page_pa + struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO * (XPC_ENGAGED_PARTITIONS_AMO *
sizeof(AMO_t))); sizeof(struct amo)));
local_irq_save(irq_flags); 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, FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
(1UL << sn_partition_id)); (1UL << sn_partition_id));
/* /*
* We must always use the nofault function regardless of whether we * 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 * 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 * 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-> (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable), variable),
@ -418,20 +421,20 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
{ {
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2; struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags; unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part_sn2->remote_amos_page_pa + struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
(XPC_ENGAGED_PARTITIONS_AMO * (XPC_ENGAGED_PARTITIONS_AMO *
sizeof(AMO_t))); sizeof(struct amo)));
local_irq_save(irq_flags); 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, FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << sn_partition_id)); ~(1UL << sn_partition_id));
/* /*
* We must always use the nofault function regardless of whether we * 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 * 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 * 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-> (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable), 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 * 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, xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
cnodeid_to_nasid(0), cnodeid_to_nasid(0),
@ -452,9 +455,9 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
static int static int
xpc_partition_engaged_sn2(short partid) 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) & return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
(1UL << partid)) != 0; (1UL << partid)) != 0;
} }
@ -462,18 +465,18 @@ xpc_partition_engaged_sn2(short partid)
static int static int
xpc_any_partition_engaged_sn2(void) 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; return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
} }
static void static void
xpc_assume_partition_disengaged_sn2(short partid) 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, FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << partid)); ~(1UL << partid));
} }
@ -482,10 +485,10 @@ xpc_assume_partition_disengaged_sn2(short partid)
static u64 xpc_prot_vec_sn2[MAX_NUMNODES]; 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 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; u64 nasid_array = 0;
int ret; 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 * On SHUB 1.1, we cannot call sn_change_memprotect() since the BIST
* collides with memory operations. On those systems we call * 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()) { if (!enable_shub_wars_1_1()) {
ret = sn_change_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE, 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 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 node;
int nasid; int nasid;
@ -536,7 +539,7 @@ xpc_allow_AMO_ops_shub_wars_1_1_sn2(void)
static enum xp_retval static enum xp_retval
xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp) xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
{ {
AMO_t *amos_page; struct amo *amos_page;
int i; int i;
int ret; int ret;
@ -549,32 +552,32 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
XPC_RP_VARS_SIZE); 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 * 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 * 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, * 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 * 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. * memory protections are never restricted.
*/ */
amos_page = xpc_vars->amos_page; amos_page = xpc_vars->amos_page;
if (amos_page == NULL) { 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) { 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; return xpNoMemory;
} }
/* /*
* Open up AMO-R/W to cpu. This is done on Shub 1.1 systems * 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. * 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) { 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 | uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1); TO_PHYS((u64)amos_page), 1);
return ret; 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) * memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part_sn2) *
xp_max_npartitions); 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++) for (i = 0; i < xp_nasid_mask_words; i++)
(void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS + 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_ENGAGED_PARTITIONS_AMO);
(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_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; struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags; unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part_sn2->remote_amos_page_pa + struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO * sizeof(AMO_t))); (XPC_DEACTIVATE_REQUEST_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags); 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, FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
(1UL << sn_partition_id)); (1UL << sn_partition_id));
/* /*
* We must always use the nofault function regardless of whether we * 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 * 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 * 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-> (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable), 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 * 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, xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
cnodeid_to_nasid(0), cnodeid_to_nasid(0),
@ -779,19 +783,20 @@ static void
xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part) xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
{ {
unsigned long irq_flags; unsigned long irq_flags;
AMO_t *amo = (AMO_t *)__va(part->sn.sn2.remote_amos_page_pa + struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
(XPC_DEACTIVATE_REQUEST_AMO * sizeof(AMO_t))); (XPC_DEACTIVATE_REQUEST_AMO *
sizeof(struct amo)));
local_irq_save(irq_flags); 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, FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~(1UL << sn_partition_id)); ~(1UL << sn_partition_id));
/* /*
* We must always use the nofault function regardless of whether we * 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 * 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 * 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-> (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable), variable),
@ -803,9 +808,9 @@ xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
static int static int
xpc_partition_deactivation_requested_sn2(short partid) 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) & return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
(1UL << partid)) != 0; (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 * which are set. Each bit indicates a nasid sending a partition
* activation or deactivation request. * activation or deactivation request.
* *
@ -989,11 +994,11 @@ xpc_identify_activate_IRQ_sender_sn2(void)
u64 nasid_mask; u64 nasid_mask;
u64 nasid; /* remote nasid */ u64 nasid; /* remote nasid */
int n_IRQs_detected = 0; int n_IRQs_detected = 0;
AMO_t *act_amos; struct amo *act_amos;
act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_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++) { for (word = 0; word < xp_nasid_mask_words; word++) {
if (xpc_exiting) if (xpc_exiting)
@ -1005,7 +1010,7 @@ xpc_identify_activate_IRQ_sender_sn2(void)
continue; 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); 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(); n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) { 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(); (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 = part_sn2->remote_openclose_args_pa =
pulled_entry->openclose_args_pa; pulled_entry->openclose_args_pa;
part_sn2->remote_chctl_amo_va = 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_nasid = pulled_entry->notify_IRQ_nasid;
part_sn2->notify_IRQ_phys_cpuid = part_sn2->notify_IRQ_phys_cpuid =
pulled_entry->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; 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 * and cleanup errors within that address range should the remote
* partition go down. We don't unregister this range because it is * partition go down. We don't unregister this range because it is
* difficult to tell when outstanding writes to the remote partition * 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_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_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_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 * 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 * License. See the file "COPYING" in the main directory of this archive
* for more details. * 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 #ifndef _ASM_IA64_SN_MSPEC_H
@ -32,26 +32,26 @@
#ifdef __KERNEL__ #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 * variable is 64 bytes long. The first 8 bytes are used. The
* remaining 56 bytes are unaddressable due to the operation taking * remaining 56 bytes are unaddressable due to the operation taking
* that portion of the address. * that portion of the address.
* *
* NOTE: The AMO_t _MUST_ be placed in either the first or second half * NOTE: The amo structure _MUST_ be placed in either the first or second
* of the cache line. The cache line _MUST NOT_ be used for anything * 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 * other than additional amo entries. This is because there are two
* addresses which reference the same physical cache line. One will * addresses which reference the same physical cache line. One will
* be a cached entry with the memory type bits all set. This address * 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 * uncached via the memory special memory type. If any portion of the
* cached cache-line is modified, when that line is flushed, it will * cached cache-line is modified, when that line is flushed, it will
* overwrite the uncached value in physical memory and lead to * overwrite the uncached value in physical memory and lead to
* inconsistency. * inconsistency.
*/ */
typedef struct { struct amo {
u64 variable; u64 variable;
u64 unused[7]; u64 unused[7];
} AMO_t; };
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */