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sgi-xp: isolate activate IRQ's hardware specific components 

Isolate architecture specific code related to XPC's activate IRQ.

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 22:34:09 -07:00 committed by Linus Torvalds
parent 97bf1aa1e1
commit 6e41017aad
4 changed files with 229 additions and 219 deletions
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14
drivers/misc/sgi-xp/xpc.h
View File

@ -480,7 +480,7 @@ struct xpc_partition {
u64 remote_amos_page_pa; /* phys addr of partition's amos page */
int remote_act_nasid; /* active part's act/deact nasid */
int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */
u32 act_IRQ_rcvd; /* IRQs since activation */
u32 activate_IRQ_rcvd; /* IRQs since activation */
spinlock_t act_lock; /* protect updating of act_state */
u8 act_state; /* from XPC HB viewpoint */
u8 remote_vars_version; /* version# of partition's vars */
@ -580,8 +580,8 @@ extern struct device *xpc_part;
extern struct device *xpc_chan;
extern int xpc_disengage_request_timelimit;
extern int xpc_disengage_request_timedout;
extern atomic_t xpc_act_IRQ_rcvd;
extern wait_queue_head_t xpc_act_IRQ_wq;
extern atomic_t xpc_activate_IRQ_rcvd;
extern wait_queue_head_t xpc_activate_IRQ_wq;
extern void *xpc_heartbeating_to_mask;
extern irqreturn_t xpc_notify_IRQ_handler(int, void *);
extern void xpc_dropped_IPI_check(struct xpc_partition *);
@ -601,7 +601,7 @@ extern u64 (*xpc_get_IPI_flags) (struct xpc_partition *);
extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *);
extern void (*xpc_initiate_partition_activation) (struct xpc_rsvd_page *, u64,
int);
extern void (*xpc_process_act_IRQ_rcvd) (int);
extern void (*xpc_process_activate_IRQ_rcvd) (int);
extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *);
extern void (*xpc_teardown_infrastructure) (struct xpc_partition *);
extern void (*xpc_mark_partition_engaged) (struct xpc_partition *);
@ -629,10 +629,12 @@ extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16,
extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *);
/* found in xpc_sn2.c */
extern void xpc_init_sn2(void);
extern int xpc_init_sn2(void);
extern void xpc_exit_sn2(void);
/* found in xpc_uv.c */
extern void xpc_init_uv(void);
extern void xpc_exit_uv(void);
/* found in xpc_partition.c */
extern int xpc_exiting;
@ -646,7 +648,7 @@ extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, 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);
extern int xpc_identify_activate_IRQ_sender(void);
extern int xpc_partition_disengaged(struct xpc_partition *);
extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
extern void xpc_mark_partition_inactive(struct xpc_partition *);

96
drivers/misc/sgi-xp/xpc_main.c
View File

@ -147,11 +147,11 @@ static struct ctl_table_header *xpc_sysctl;
/* non-zero if any remote partition disengage request was timed out */
int xpc_disengage_request_timedout;
/* #of IRQs received */
atomic_t xpc_act_IRQ_rcvd;
/* #of activate IRQs received */
atomic_t xpc_activate_IRQ_rcvd = ATOMIC_INIT(0);
/* IRQ handler notifies this wait queue on receipt of an IRQ */
DECLARE_WAIT_QUEUE_HEAD(xpc_act_IRQ_wq);
DECLARE_WAIT_QUEUE_HEAD(xpc_activate_IRQ_wq);
static unsigned long xpc_hb_check_timeout;
static struct timer_list xpc_hb_timer;
@ -190,7 +190,7 @@ struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch);
void (*xpc_initiate_partition_activation) (struct xpc_rsvd_page *remote_rp,
u64 remote_rp_pa, int nasid);
void (*xpc_process_act_IRQ_rcvd) (int n_IRQs_expected);
void (*xpc_process_activate_IRQ_rcvd) (int n_IRQs_expected);
enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *part);
void (*xpc_teardown_infrastructure) (struct xpc_partition *part);
@ -238,17 +238,6 @@ xpc_timeout_partition_disengage_request(unsigned long data)
DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
}
/*
* Notify the heartbeat check thread that an IRQ has been received.
*/
static irqreturn_t
xpc_act_IRQ_handler(int irq, void *dev_id)
{
atomic_inc(&xpc_act_IRQ_rcvd);
wake_up_interruptible(&xpc_act_IRQ_wq);
return IRQ_HANDLED;
}
/*
* Timer to produce the heartbeat. The timer structures function is
* already set when this is initially called. A tunable is used to
@ -260,7 +249,7 @@ xpc_hb_beater(unsigned long dummy)
xpc_increment_heartbeat();
if (time_is_before_eq_jiffies(xpc_hb_check_timeout))
wake_up_interruptible(&xpc_act_IRQ_wq);
wake_up_interruptible(&xpc_activate_IRQ_wq);
xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
add_timer(&xpc_hb_timer);
@ -306,7 +295,7 @@ xpc_hb_checker(void *ignore)
dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
"been received\n",
(int)(xpc_hb_check_timeout - jiffies),
atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
atomic_read(&xpc_activate_IRQ_rcvd) - last_IRQ_count);
/* checking of remote heartbeats is skewed by IRQ handling */
if (time_is_before_eq_jiffies(xpc_hb_check_timeout)) {
@ -322,15 +311,15 @@ xpc_hb_checker(void *ignore)
}
/* check for outstanding IRQs */
new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
new_IRQ_count = atomic_read(&xpc_activate_IRQ_rcvd);
if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
force_IRQ = 0;
dev_dbg(xpc_part, "found an IRQ to process; will be "
"resetting xpc_hb_check_timeout\n");
xpc_process_act_IRQ_rcvd(new_IRQ_count -
last_IRQ_count);
xpc_process_activate_IRQ_rcvd(new_IRQ_count -
last_IRQ_count);
last_IRQ_count = new_IRQ_count;
xpc_hb_check_timeout = jiffies +
@ -338,9 +327,9 @@ xpc_hb_checker(void *ignore)
}
/* wait for IRQ or timeout */
(void)wait_event_interruptible(xpc_act_IRQ_wq,
(last_IRQ_count <
atomic_read(&xpc_act_IRQ_rcvd)
(void)wait_event_interruptible(xpc_activate_IRQ_wq,
(last_IRQ_count < atomic_read(
&xpc_activate_IRQ_rcvd)
|| time_is_before_eq_jiffies(
xpc_hb_check_timeout) ||
xpc_exiting));
@ -884,10 +873,7 @@ xpc_do_exit(enum xp_retval reason)
* the heartbeat checker thread in case it's sleeping.
*/
xpc_exiting = 1;
wake_up_interruptible(&xpc_act_IRQ_wq);
/* ignore all incoming interrupts */
free_irq(SGI_XPC_ACTIVATE, NULL);
wake_up_interruptible(&xpc_activate_IRQ_wq);
/* wait for the discovery thread to exit */
wait_for_completion(&xpc_discovery_exited);
@ -968,9 +954,6 @@ xpc_do_exit(enum xp_retval reason)
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
}
/* close down protections for IPI operations */
xpc_restrict_IPI_ops();
/* clear the interface to XPC's functions */
xpc_clear_interface();
@ -979,6 +962,11 @@ xpc_do_exit(enum xp_retval reason)
kfree(xpc_partitions);
kfree(xpc_remote_copy_buffer_base);
if (is_shub())
xpc_exit_sn2();
else
xpc_exit_uv();
}
/*
@ -1144,7 +1132,9 @@ xpc_init(void)
if (xp_max_npartitions != 64)
return -EINVAL;
xpc_init_sn2();
ret = xpc_init_sn2();
if (ret != 0)
return ret;
} else if (is_uv()) {
xpc_init_uv();
@ -1163,7 +1153,8 @@ xpc_init(void)
&xpc_remote_copy_buffer_base);
if (xpc_remote_copy_buffer == NULL) {
dev_err(xpc_part, "can't get memory for remote copy buffer\n");
return -ENOMEM;
ret = -ENOMEM;
goto out_1;
}
xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
@ -1171,7 +1162,7 @@ xpc_init(void)
if (xpc_partitions == NULL) {
dev_err(xpc_part, "can't get memory for partition structure\n");
ret = -ENOMEM;
goto out_1;
goto out_2;
}
/*
@ -1187,7 +1178,7 @@ xpc_init(void)
DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
part->act_IRQ_rcvd = 0;
part->activate_IRQ_rcvd = 0;
spin_lock_init(&part->act_lock);
part->act_state = XPC_P_INACTIVE;
XPC_SET_REASON(part, 0, 0);
@ -1204,33 +1195,6 @@ xpc_init(void)
xpc_sysctl = register_sysctl_table(xpc_sys_dir);
/*
* Open up protections for IPI operations (and AMO operations on
* Shub 1.1 systems).
*/
xpc_allow_IPI_ops();
/*
* Interrupts being processed will increment this atomic variable and
* awaken the heartbeat thread which will process the interrupts.
*/
atomic_set(&xpc_act_IRQ_rcvd, 0);
/*
* This is safe to do before the xpc_hb_checker thread has started
* because the handler releases a wait queue. If an interrupt is
* received before the thread is waiting, it will not go to sleep,
* but rather immediately process the interrupt.
*/
ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
"xpc hb", NULL);
if (ret != 0) {
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
ret = -EBUSY;
goto out_2;
}
/*
* Fill the partition reserved page with the information needed by
* other partitions to discover we are alive and establish initial
@ -1296,14 +1260,16 @@ out_4:
(void)unregister_die_notifier(&xpc_die_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
out_3:
free_irq(SGI_XPC_ACTIVATE, NULL);
out_2:
xpc_restrict_IPI_ops();
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
out_1:
out_2:
kfree(xpc_remote_copy_buffer_base);
out_1:
if (is_shub())
xpc_exit_sn2();
else
xpc_exit_uv();
return ret;
}

121
drivers/misc/sgi-xp/xpc_partition.c
View File

@ -29,16 +29,6 @@
/* XPC is exiting flag */
int xpc_exiting;
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access;
static u64 xpc_sh2_IPI_access0;
static u64 xpc_sh2_IPI_access1;
static u64 xpc_sh2_IPI_access2;
static u64 xpc_sh2_IPI_access3;
/* original protection values for each node */
u64 xpc_prot_vec[MAX_NUMNODES];
/* this partition's reserved page pointers */
struct xpc_rsvd_page *xpc_rsvd_page;
static u64 *xpc_part_nasids;
@ -210,117 +200,6 @@ xpc_setup_rsvd_page(void)
return rp;
}
/*
* Change protections to allow IPI operations (and AMO operations on
* Shub 1.1 systems).
*/
void
xpc_allow_IPI_ops(void)
{
int node;
int nasid;
/* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
if (is_shub2()) {
xpc_sh2_IPI_access0 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
xpc_sh2_IPI_access1 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
xpc_sh2_IPI_access2 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
xpc_sh2_IPI_access3 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-1UL);
}
} else {
xpc_sh1_IPI_access =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-1UL);
/*
* Since the BIST collides with memory operations on
* SHUB 1.1 sn_change_memprotect() cannot be used.
*/
if (enable_shub_wars_1_1()) {
/* open up everything */
xpc_prot_vec[node] = (u64)HUB_L((u64 *)
GLOBAL_MMR_ADDR
(nasid,
SH1_MD_DQLP_MMR_DIR_PRIVEC0));
HUB_S((u64 *)
GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQLP_MMR_DIR_PRIVEC0),
-1UL);
HUB_S((u64 *)
GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQRP_MMR_DIR_PRIVEC0),
-1UL);
}
}
}
}
/*
* Restrict protections to disallow IPI operations (and AMO operations on
* Shub 1.1 systems).
*/
void
xpc_restrict_IPI_ops(void)
{
int node;
int nasid;
/* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
if (is_shub2()) {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
xpc_sh2_IPI_access0);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
xpc_sh2_IPI_access1);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
xpc_sh2_IPI_access2);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
xpc_sh2_IPI_access3);
}
} else {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
xpc_sh1_IPI_access);
if (enable_shub_wars_1_1()) {
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQLP_MMR_DIR_PRIVEC0),
xpc_prot_vec[node]);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQRP_MMR_DIR_PRIVEC0),
xpc_prot_vec[node]);
}
}
}
}
/*
* Get a copy of a portion of the remote partition's rsvd page.
*

217
drivers/misc/sgi-xp/xpc_sn2.c
View File

@ -22,6 +22,87 @@
static struct xpc_vars_sn2 *xpc_vars; /* >>> Add _sn2 suffix? */
static struct xpc_vars_part_sn2 *xpc_vars_part; /* >>> Add _sn2 suffix? */
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access;
static u64 xpc_sh2_IPI_access0;
static u64 xpc_sh2_IPI_access1;
static u64 xpc_sh2_IPI_access2;
static u64 xpc_sh2_IPI_access3;
/*
* Change protections to allow IPI operations.
*/
static void
xpc_allow_IPI_ops_sn2(void)
{
int node;
int nasid;
/* >>> The following should get moved into SAL. */
if (is_shub2()) {
xpc_sh2_IPI_access0 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
xpc_sh2_IPI_access1 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
xpc_sh2_IPI_access2 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
xpc_sh2_IPI_access3 =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-1UL);
}
} else {
xpc_sh1_IPI_access =
(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-1UL);
}
}
}
/*
* Restrict protections to disallow IPI operations.
*/
static void
xpc_disallow_IPI_ops_sn2(void)
{
int node;
int nasid;
/* >>> The following should get moved into SAL. */
if (is_shub2()) {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
xpc_sh2_IPI_access0);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
xpc_sh2_IPI_access1);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
xpc_sh2_IPI_access2);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
xpc_sh2_IPI_access3);
}
} else {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
xpc_sh1_IPI_access);
}
}
}
/*
* The following set of macros and functions are used for the sending and
* receiving of IPIs (also known as IRQs). There are two flavors of IPIs,
@ -73,6 +154,17 @@ xpc_IPI_init_sn2(int index)
* IPIs associated with SGI_XPC_ACTIVATE IRQ.
*/
/*
* Notify the heartbeat check thread that an activate IRQ has been received.
*/
static irqreturn_t
xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
{
atomic_inc(&xpc_activate_IRQ_rcvd);
wake_up_interruptible(&xpc_activate_IRQ_wq);
return IRQ_HANDLED;
}
/*
* Flag the appropriate AMO variable and send an IPI to the specified node.
*/
@ -100,8 +192,8 @@ xpc_activate_IRQ_send_local_sn2(int from_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,
(1UL << b_index));
atomic_inc(&xpc_act_IRQ_rcvd);
wake_up_interruptible(&xpc_act_IRQ_wq);
atomic_inc(&xpc_activate_IRQ_rcvd);
wake_up_interruptible(&xpc_activate_IRQ_wq);
}
static void
@ -383,11 +475,65 @@ xpc_clear_partition_disengage_request_sn2(u64 partid_mask)
~partid_mask);
}
/* original protection values for each node */
static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
/*
* 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)
{
u64 nasid_array = 0;
int ret;
/*
* 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.
*/
if (!enable_shub_wars_1_1()) {
ret = sn_change_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE,
SN_MEMPROT_ACCESS_CLASS_1,
&nasid_array);
if (ret != 0)
return xpSalError;
}
return xpSuccess;
}
/*
* Change protections to allow AMO operations on Shub 1.1 systems.
*/
static void
xpc_allow_AMO_ops_shub_wars_1_1_sn2(void)
{
int node;
int nasid;
if (!enable_shub_wars_1_1())
return;
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
/* save current protection values */
xpc_prot_vec_sn2[node] =
(u64)HUB_L((u64 *)GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQLP_MMR_DIR_PRIVEC0));
/* open up everything */
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQLP_MMR_DIR_PRIVEC0),
-1UL);
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
SH1_MD_DQRP_MMR_DIR_PRIVEC0),
-1UL);
}
}
static enum xp_retval
xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
{
AMO_t *amos_page;
u64 nasid_array = 0;
int i;
int ret;
@ -421,21 +567,15 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
}
/*
* Open up AMO-R/W to cpu. This is done for Shub 1.1 systems
* when xpc_allow_IPI_ops() is called via xpc_hb_init().
* 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.
*/
if (!enable_shub_wars_1_1()) {
ret = sn_change_memprotect(ia64_tpa((u64)amos_page),
PAGE_SIZE,
SN_MEMPROT_ACCESS_CLASS_1,
&nasid_array);
if (ret != 0) {
dev_err(xpc_part, "can't change memory "
"protections\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1);
return xpSalError;
}
ret = xpc_allow_AMO_ops_sn2(amos_page);
if (ret != xpSuccess) {
dev_err(xpc_part, "can't allow AMO operations\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1);
return ret;
}
}
@ -656,7 +796,7 @@ xpc_update_partition_info_sn2(struct xpc_partition *part, u8 remote_rp_version,
* initialized reserved page.
*/
static void
xpc_identify_act_IRQ_req_sn2(int nasid)
xpc_identify_activate_IRQ_req_sn2(int nasid)
{
struct xpc_rsvd_page *remote_rp;
struct xpc_vars_sn2 *remote_vars;
@ -702,10 +842,10 @@ xpc_identify_act_IRQ_req_sn2(int nasid)
return;
}
part->act_IRQ_rcvd++;
part->activate_IRQ_rcvd++;
dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
"%ld:0x%lx\n", (int)nasid, (int)partid, part->act_IRQ_rcvd,
"%ld:0x%lx\n", (int)nasid, (int)partid, part->activate_IRQ_rcvd,
remote_vars->heartbeat, remote_vars->heartbeating_to_mask[0]);
if (xpc_partition_disengaged(part) &&
@ -831,7 +971,7 @@ xpc_identify_act_IRQ_req_sn2(int nasid)
* Return #of IRQs detected.
*/
int
xpc_identify_act_IRQ_sender_sn2(void)
xpc_identify_activate_IRQ_sender_sn2(void)
{
int word, bit;
u64 nasid_mask;
@ -872,7 +1012,7 @@ xpc_identify_act_IRQ_sender_sn2(void)
nasid = XPC_NASID_FROM_W_B(word, bit);
dev_dbg(xpc_part, "interrupt from nasid %ld\n",
nasid);
xpc_identify_act_IRQ_req_sn2(nasid);
xpc_identify_activate_IRQ_req_sn2(nasid);
}
}
}
@ -880,14 +1020,14 @@ xpc_identify_act_IRQ_sender_sn2(void)
}
static void
xpc_process_act_IRQ_rcvd_sn2(int n_IRQs_expected)
xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected)
{
int n_IRQs_detected;
n_IRQs_detected = xpc_identify_act_IRQ_sender_sn2();
n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) {
/* retry once to help avoid missing AMO */
(void)xpc_identify_act_IRQ_sender_sn2();
(void)xpc_identify_activate_IRQ_sender_sn2();
}
}
@ -1775,9 +1915,11 @@ xpc_received_msg_sn2(struct xpc_channel *ch, struct xpc_msg *msg)
xpc_acknowledge_msgs_sn2(ch, get, msg->flags);
}
void
int
xpc_init_sn2(void)
{
int ret;
xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
xpc_offline_heartbeat = xpc_offline_heartbeat_sn2;
@ -1788,7 +1930,7 @@ xpc_init_sn2(void)
xpc_initiate_partition_activation =
xpc_initiate_partition_activation_sn2;
xpc_process_act_IRQ_rcvd = xpc_process_act_IRQ_rcvd_sn2;
xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_sn2;
xpc_setup_infrastructure = xpc_setup_infrastructure_sn2;
xpc_teardown_infrastructure = xpc_teardown_infrastructure_sn2;
xpc_make_first_contact = xpc_make_first_contact_sn2;
@ -1819,9 +1961,30 @@ 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 */
xpc_allow_IPI_ops_sn2();
xpc_allow_AMO_ops_shub_wars_1_1_sn2();
/*
* This is safe to do before the xpc_hb_checker thread has started
* because the handler releases a wait queue. If an interrupt is
* received before the thread is waiting, it will not go to sleep,
* but rather immediately process the interrupt.
*/
ret = request_irq(SGI_XPC_ACTIVATE, xpc_handle_activate_IRQ_sn2, 0,
"xpc hb", NULL);
if (ret != 0) {
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
xpc_disallow_IPI_ops_sn2();
}
return ret;
}
void
xpc_exit_sn2(void)
{
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_disallow_IPI_ops_sn2();
}