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sgi-xp: setup the activate GRU message queue

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Setup the activate GRU message queue that is used for partition activation
and channel connection on UV systems.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.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 22:34:18 -07:00 committed by Linus Torvalds
parent 83469b5525
commit 5b8669dfd1
8 changed files with 1332 additions and 394 deletions
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3
drivers/misc/sgi-xp/xp.h
View file

@ -208,8 +208,9 @@ enum xp_retval {
xpNeedMoreInfo, /* 57: more info is needed by SAL */
xpGruCopyError, /* 58: gru_copy_gru() returned error */
xpGruSendMqError, /* 59: gru send message queue related error */
xpUnknownReason /* 59: unknown reason - must be last in enum */
xpUnknownReason /* 60: unknown reason - must be last in enum */
};
/*

10
drivers/misc/sgi-xp/xp_uv.c
View file

@ -42,15 +42,25 @@ xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
return xpGruCopyError;
}
static int
xp_cpu_to_nasid_uv(int cpuid)
{
/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
}
enum xp_retval
xp_init_uv(void)
{
BUG_ON(!is_uv());
xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
xp_partition_id = 0; /* !!! not correct value */
xp_region_size = 0; /* !!! not correct value */
xp_pa = xp_pa_uv;
xp_remote_memcpy = xp_remote_memcpy_uv;
xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
return xpSuccess;
}

158
drivers/misc/sgi-xp/xpc.h
View file

@ -164,8 +164,8 @@ struct xpc_vars_part_sn2 {
* MAGIC2 indicates that this partition has pulled the remote partititions
* per partition variables that pertain to this partition.
*/
#define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
#define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
#define XPC_VP_MAGIC1_SN2 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
#define XPC_VP_MAGIC2_SN2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
/* the reserved page sizes and offsets */
@ -180,6 +180,80 @@ struct xpc_vars_part_sn2 {
(XPC_RP_MACH_NASIDS(_rp) + \
xpc_nasid_mask_nlongs))
/*
* The activate_mq is used to send/receive messages that affect XPC's heartbeat,
* partition active state, and channel state. This is UV only.
*/
struct xpc_activate_mq_msghdr_uv {
short partid; /* sender's partid */
u8 act_state; /* sender's act_state at time msg sent */
u8 type; /* message's type */
unsigned long rp_ts_jiffies; /* timestamp of sender's rp setup by XPC */
};
/* activate_mq defined message types */
#define XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV 0
#define XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV 1
#define XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV 2
#define XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV 3
#define XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV 4
#define XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV 5
#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV 6
#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV 7
#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV 8
#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV 9
#define XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV 10
#define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 11
struct xpc_activate_mq_msg_uv {
struct xpc_activate_mq_msghdr_uv header;
};
struct xpc_activate_mq_msg_heartbeat_req_uv {
struct xpc_activate_mq_msghdr_uv header;
u64 heartbeat;
};
struct xpc_activate_mq_msg_activate_req_uv {
struct xpc_activate_mq_msghdr_uv header;
unsigned long rp_gpa;
unsigned long activate_mq_gpa;
};
struct xpc_activate_mq_msg_deactivate_req_uv {
struct xpc_activate_mq_msghdr_uv header;
enum xp_retval reason;
};
struct xpc_activate_mq_msg_chctl_closerequest_uv {
struct xpc_activate_mq_msghdr_uv header;
short ch_number;
enum xp_retval reason;
};
struct xpc_activate_mq_msg_chctl_closereply_uv {
struct xpc_activate_mq_msghdr_uv header;
short ch_number;
};
struct xpc_activate_mq_msg_chctl_openrequest_uv {
struct xpc_activate_mq_msghdr_uv header;
short ch_number;
short msg_size; /* size of notify_mq's messages */
short local_nentries; /* ??? Is this needed? What is? */
};
struct xpc_activate_mq_msg_chctl_openreply_uv {
struct xpc_activate_mq_msghdr_uv header;
short ch_number;
short remote_nentries; /* ??? Is this needed? What is? */
short local_nentries; /* ??? Is this needed? What is? */
unsigned long local_notify_mq_gpa;
};
/*
* Functions registered by add_timer() or called by kernel_thread() only
* allow for a single 64-bit argument. The following macros can be used to
@ -331,6 +405,18 @@ struct xpc_notify {
*/
struct xpc_channel_sn2 {
struct xpc_openclose_args *local_openclose_args; /* args passed on */
/* opening or closing of channel */
void *local_msgqueue_base; /* base address of kmalloc'd space */
struct xpc_msg *local_msgqueue; /* local message queue */
void *remote_msgqueue_base; /* base address of kmalloc'd space */
struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
/* local message queue */
unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
/* local message queue */
struct xpc_notify *notify_queue; /* notify queue for messages sent */
/* various flavors of local and remote Get/Put values */
@ -344,13 +430,14 @@ struct xpc_channel_sn2 {
};
struct xpc_channel_uv {
/* !!! code is coming */
unsigned long remote_notify_mq_gpa; /* gru phys address of remote */
/* partition's notify mq */
};
struct xpc_channel {
short partid; /* ID of remote partition connected */
spinlock_t lock; /* lock for updating this structure */
u32 flags; /* general flags */
unsigned int flags; /* general flags */
enum xp_retval reason; /* reason why channel is disconnect'g */
int reason_line; /* line# disconnect initiated from */
@ -361,14 +448,6 @@ struct xpc_channel {
u16 local_nentries; /* #of msg entries in local msg queue */
u16 remote_nentries; /* #of msg entries in remote msg queue */
void *local_msgqueue_base; /* base address of kmalloc'd space */
struct xpc_msg *local_msgqueue; /* local message queue */
void *remote_msgqueue_base; /* base address of kmalloc'd space */
struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
/* local message queue */
unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
/* local message queue */
atomic_t references; /* #of external references to queues */
atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
@ -377,19 +456,13 @@ struct xpc_channel {
u8 delayed_chctl_flags; /* chctl flags received, but delayed */
/* action until channel disconnected */
/* queue of msg senders who want to be notified when msg received */
atomic_t n_to_notify; /* #of msg senders to notify */
struct xpc_notify *notify_queue; /* notify queue for messages sent */
xpc_channel_func func; /* user's channel function */
void *key; /* pointer to user's key */
struct completion wdisconnect_wait; /* wait for channel disconnect */
struct xpc_openclose_args *local_openclose_args; /* args passed on */
/* opening or closing of channel */
/* kthread management related fields */
atomic_t kthreads_assigned; /* #of kthreads assigned to channel */
@ -507,6 +580,8 @@ struct xpc_partition_sn2 {
unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
/* Get/Put values */
void *local_openclose_args_base; /* base address of kmalloc'd space */
struct xpc_openclose_args *local_openclose_args; /* local's args */
unsigned long remote_openclose_args_pa; /* phys addr of remote's args */
int notify_IRQ_nasid; /* nasid of where to send notify IRQs */
@ -520,9 +595,27 @@ struct xpc_partition_sn2 {
};
struct xpc_partition_uv {
/* !!! code is coming */
unsigned long remote_activate_mq_gpa; /* gru phys address of remote */
/* partition's activate mq */
spinlock_t flags_lock; /* protect updating of flags */
unsigned int flags; /* general flags */
u8 remote_act_state; /* remote partition's act_state */
u8 act_state_req; /* act_state request from remote partition */
enum xp_retval reason; /* reason for deactivate act_state request */
u64 heartbeat; /* incremented by remote partition */
};
/* struct xpc_partition_uv flags */
#define XPC_P_HEARTBEAT_OFFLINE_UV 0x00000001
#define XPC_P_ENGAGED_UV 0x00000002
/* struct xpc_partition_uv act_state change requests */
#define XPC_P_ASR_ACTIVATE_UV 0x01
#define XPC_P_ASR_REACTIVATE_UV 0x02
#define XPC_P_ASR_DEACTIVATE_UV 0x03
struct xpc_partition {
/* XPC HB infrastructure */
@ -556,8 +649,6 @@ struct xpc_partition {
union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */
spinlock_t chctl_lock; /* chctl flags lock */
void *local_openclose_args_base; /* base address of kmalloc'd space */
struct xpc_openclose_args *local_openclose_args; /* local's args */
void *remote_openclose_args_base; /* base address of kmalloc'd space */
struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
/* args */
@ -616,17 +707,20 @@ extern struct device *xpc_part;
extern struct device *xpc_chan;
extern int xpc_disengage_timelimit;
extern int xpc_disengage_timedout;
extern atomic_t xpc_activate_IRQ_rcvd;
extern int xpc_activate_IRQ_rcvd;
extern spinlock_t xpc_activate_IRQ_rcvd_lock;
extern wait_queue_head_t xpc_activate_IRQ_wq;
extern void *xpc_heartbeating_to_mask;
extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **);
extern void xpc_activate_partition(struct xpc_partition *);
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 int (*xpc_setup_partitions_sn) (void);
extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *,
unsigned long *,
size_t *);
extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *);
extern int (*xpc_setup_rsvd_page_sn) (struct xpc_rsvd_page *);
extern void (*xpc_heartbeat_init) (void);
extern void (*xpc_heartbeat_exit) (void);
extern void (*xpc_increment_heartbeat) (void);
@ -635,8 +729,8 @@ extern void (*xpc_online_heartbeat) (void);
extern enum xp_retval (*xpc_get_remote_heartbeat) (struct xpc_partition *);
extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *);
extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *);
extern enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *);
extern void (*xpc_free_msgqueues) (struct xpc_channel *);
extern enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *);
extern void (*xpc_teardown_msg_structures) (struct xpc_channel *);
extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *);
extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int);
extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *);
@ -647,9 +741,9 @@ extern void (*xpc_request_partition_reactivation) (struct xpc_partition *);
extern void (*xpc_request_partition_deactivation) (struct xpc_partition *);
extern void (*xpc_cancel_partition_deactivation_request) (
struct xpc_partition *);
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_process_activate_IRQ_rcvd) (void);
extern enum xp_retval (*xpc_setup_ch_structures_sn) (struct xpc_partition *);
extern void (*xpc_teardown_ch_structures_sn) (struct xpc_partition *);
extern void (*xpc_indicate_partition_engaged) (struct xpc_partition *);
extern int (*xpc_partition_engaged) (short);
@ -665,6 +759,9 @@ extern void (*xpc_send_chctl_openrequest) (struct xpc_channel *,
unsigned long *);
extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *);
extern void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
unsigned long);
extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16,
u8, xpc_notify_func, void *);
extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *);
@ -674,7 +771,7 @@ extern int xpc_init_sn2(void);
extern void xpc_exit_sn2(void);
/* found in xpc_uv.c */
extern void xpc_init_uv(void);
extern int xpc_init_uv(void);
extern void xpc_exit_uv(void);
/* found in xpc_partition.c */
@ -684,7 +781,8 @@ extern struct xpc_rsvd_page *xpc_rsvd_page;
extern unsigned long *xpc_mach_nasids;
extern struct xpc_partition *xpc_partitions;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
extern int xpc_setup_rsvd_page(void);
extern void xpc_teardown_rsvd_page(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 *);

22
drivers/misc/sgi-xp/xpc_channel.c
View file

@ -39,7 +39,7 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
if (!(ch->flags & XPC_C_SETUP)) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
ret = xpc_allocate_msgqueues(ch);
ret = xpc_setup_msg_structures(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);
if (ret != xpSuccess)
@ -62,8 +62,6 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
if (!(ch->flags & XPC_C_ROPENREPLY))
return;
DBUG_ON(ch->remote_msgqueue_pa == 0);
ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
dev_info(xpc_chan, "channel %d to partition %d connected\n",
@ -134,13 +132,23 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
spin_lock_irqsave(&ch->lock, *irq_flags);
}
DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
/* it's now safe to free the channel's message queues */
xpc_free_msgqueues(ch);
xpc_teardown_msg_structures(ch);
ch->func = NULL;
ch->key = NULL;
ch->msg_size = 0;
ch->local_nentries = 0;
ch->remote_nentries = 0;
ch->kthreads_assigned_limit = 0;
ch->kthreads_idle_limit = 0;
/*
* Mark the channel disconnected and clear all other flags, including
* XPC_C_SETUP (because of call to xpc_free_msgqueues()) but not
* including XPC_C_WDISCONNECT (if it was set).
* XPC_C_SETUP (because of call to xpc_teardown_msg_structures()) but
* not including XPC_C_WDISCONNECT (if it was set).
*/
ch->flags = (XPC_C_DISCONNECTED | (ch->flags & XPC_C_WDISCONNECT));
@ -395,7 +403,7 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
DBUG_ON(args->remote_nentries == 0);
ch->flags |= XPC_C_ROPENREPLY;
ch->remote_msgqueue_pa = args->local_msgqueue_pa;
xpc_save_remote_msgqueue_pa(ch, args->local_msgqueue_pa);
if (args->local_nentries < ch->remote_nentries) {
dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "

329
drivers/misc/sgi-xp/xpc_main.c
View file

@ -141,8 +141,9 @@ static struct ctl_table_header *xpc_sysctl;
/* non-zero if any remote partition disengage was timed out */
int xpc_disengage_timedout;
/* #of activate IRQs received */
atomic_t xpc_activate_IRQ_rcvd = ATOMIC_INIT(0);
/* #of activate IRQs received and not yet processed */
int xpc_activate_IRQ_rcvd;
DEFINE_SPINLOCK(xpc_activate_IRQ_rcvd_lock);
/* IRQ handler notifies this wait queue on receipt of an IRQ */
DECLARE_WAIT_QUEUE_HEAD(xpc_activate_IRQ_wq);
@ -169,10 +170,11 @@ static struct notifier_block xpc_die_notifier = {
.notifier_call = xpc_system_die,
};
int (*xpc_setup_partitions_sn) (void);
enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *buf, u64 *cookie,
unsigned long *rp_pa,
size_t *len);
enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *rp);
int (*xpc_setup_rsvd_page_sn) (struct xpc_rsvd_page *rp);
void (*xpc_heartbeat_init) (void);
void (*xpc_heartbeat_exit) (void);
void (*xpc_increment_heartbeat) (void);
@ -183,8 +185,8 @@ enum xp_retval (*xpc_get_remote_heartbeat) (struct xpc_partition *part);
enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *part);
void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *ch);
u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *part);
enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *ch);
void (*xpc_free_msgqueues) (struct xpc_channel *ch);
enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *ch);
void (*xpc_teardown_msg_structures) (struct xpc_channel *ch);
void (*xpc_process_msg_chctl_flags) (struct xpc_partition *part, int ch_number);
int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *ch);
struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch);
@ -196,9 +198,9 @@ void (*xpc_request_partition_reactivation) (struct xpc_partition *part);
void (*xpc_request_partition_deactivation) (struct xpc_partition *part);
void (*xpc_cancel_partition_deactivation_request) (struct xpc_partition *part);
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);
void (*xpc_process_activate_IRQ_rcvd) (void);
enum xp_retval (*xpc_setup_ch_structures_sn) (struct xpc_partition *part);
void (*xpc_teardown_ch_structures_sn) (struct xpc_partition *part);
void (*xpc_indicate_partition_engaged) (struct xpc_partition *part);
int (*xpc_partition_engaged) (short partid);
@ -215,6 +217,9 @@ void (*xpc_send_chctl_openrequest) (struct xpc_channel *ch,
void (*xpc_send_chctl_openreply) (struct xpc_channel *ch,
unsigned long *irq_flags);
void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *ch,
unsigned long msgqueue_pa);
enum xp_retval (*xpc_send_msg) (struct xpc_channel *ch, u32 flags,
void *payload, u16 payload_size, u8 notify_type,
xpc_notify_func func, void *key);
@ -308,8 +313,6 @@ xpc_check_remote_hb(void)
static int
xpc_hb_checker(void *ignore)
{
int last_IRQ_count = 0;
int new_IRQ_count;
int force_IRQ = 0;
/* this thread was marked active by xpc_hb_init() */
@ -325,43 +328,37 @@ 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_activate_IRQ_rcvd) - last_IRQ_count);
xpc_activate_IRQ_rcvd);
/* checking of remote heartbeats is skewed by IRQ handling */
if (time_is_before_eq_jiffies(xpc_hb_check_timeout)) {
xpc_hb_check_timeout = jiffies +
(xpc_hb_check_interval * HZ);
dev_dbg(xpc_part, "checking remote heartbeats\n");
xpc_check_remote_hb();
/*
* We need to periodically recheck to ensure no
* IRQ/amo pairs have been missed. That check
* must always reset xpc_hb_check_timeout.
* On sn2 we need to periodically recheck to ensure no
* IRQ/amo pairs have been missed.
*/
force_IRQ = 1;
if (is_shub())
force_IRQ = 1;
}
/* check for outstanding IRQs */
new_IRQ_count = atomic_read(&xpc_activate_IRQ_rcvd);
if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
if (xpc_activate_IRQ_rcvd > 0 || 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_activate_IRQ_rcvd(new_IRQ_count -
last_IRQ_count);
last_IRQ_count = new_IRQ_count;
xpc_hb_check_timeout = jiffies +
(xpc_hb_check_interval * HZ);
dev_dbg(xpc_part, "processing activate IRQs "
"received\n");
xpc_process_activate_IRQ_rcvd();
}
/* wait for IRQ or timeout */
(void)wait_event_interruptible(xpc_activate_IRQ_wq,
(last_IRQ_count < atomic_read(
&xpc_activate_IRQ_rcvd)
|| time_is_before_eq_jiffies(
(time_is_before_eq_jiffies(
xpc_hb_check_timeout) ||
xpc_activate_IRQ_rcvd > 0 ||
xpc_exiting));
}
@ -436,6 +433,153 @@ xpc_channel_mgr(struct xpc_partition *part)
}
}
/*
* Guarantee that the kzalloc'd memory is cacheline aligned.
*/
void *
xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
{
/* see if kzalloc will give us cachline aligned memory by default */
*base = kzalloc(size, flags);
if (*base == NULL)
return NULL;
if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
return *base;
kfree(*base);
/* nope, we'll have to do it ourselves */
*base = kzalloc(size + L1_CACHE_BYTES, flags);
if (*base == NULL)
return NULL;
return (void *)L1_CACHE_ALIGN((u64)*base);
}
/*
* Setup the channel structures necessary to support XPartition Communication
* between the specified remote partition and the local one.
*/
static enum xp_retval
xpc_setup_ch_structures(struct xpc_partition *part)
{
enum xp_retval ret;
int ch_number;
struct xpc_channel *ch;
short partid = XPC_PARTID(part);
/*
* Allocate all of the channel structures as a contiguous chunk of
* memory.
*/
DBUG_ON(part->channels != NULL);
part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_MAX_NCHANNELS,
GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
return xpNoMemory;
}
/* allocate the remote open and close args */
part->remote_openclose_args =
xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
GFP_KERNEL, &part->
remote_openclose_args_base);
if (part->remote_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for remote connect args\n");
ret = xpNoMemory;
goto out_1;
}
part->chctl.all_flags = 0;
spin_lock_init(&part->chctl_lock);
atomic_set(&part->channel_mgr_requests, 1);
init_waitqueue_head(&part->channel_mgr_wq);
part->nchannels = XPC_MAX_NCHANNELS;
atomic_set(&part->nchannels_active, 0);
atomic_set(&part->nchannels_engaged, 0);
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
ch->partid = partid;
ch->number = ch_number;
ch->flags = XPC_C_DISCONNECTED;
atomic_set(&ch->kthreads_assigned, 0);
atomic_set(&ch->kthreads_idle, 0);
atomic_set(&ch->kthreads_active, 0);
atomic_set(&ch->references, 0);
atomic_set(&ch->n_to_notify, 0);
spin_lock_init(&ch->lock);
init_completion(&ch->wdisconnect_wait);
atomic_set(&ch->n_on_msg_allocate_wq, 0);
init_waitqueue_head(&ch->msg_allocate_wq);
init_waitqueue_head(&ch->idle_wq);
}
ret = xpc_setup_ch_structures_sn(part);
if (ret != xpSuccess)
goto out_2;
/*
* With the setting of the partition setup_state to XPC_P_SS_SETUP,
* we're declaring that this partition is ready to go.
*/
part->setup_state = XPC_P_SS_SETUP;
return xpSuccess;
/* setup of ch structures failed */
out_2:
kfree(part->remote_openclose_args_base);
part->remote_openclose_args = NULL;
out_1:
kfree(part->channels);
part->channels = NULL;
return ret;
}
/*
* Teardown the channel structures necessary to support XPartition Communication
* between the specified remote partition and the local one.
*/
static void
xpc_teardown_ch_structures(struct xpc_partition *part)
{
DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
DBUG_ON(atomic_read(&part->nchannels_active) != 0);
/*
* Make this partition inaccessible to local processes by marking it
* as no longer setup. Then wait before proceeding with the teardown
* until all existing references cease.
*/
DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
part->setup_state = XPC_P_SS_WTEARDOWN;
wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
/* now we can begin tearing down the infrastructure */
xpc_teardown_ch_structures_sn(part);
kfree(part->remote_openclose_args_base);
part->remote_openclose_args = NULL;
kfree(part->channels);
part->channels = NULL;
part->setup_state = XPC_P_SS_TORNDOWN;
}
/*
* When XPC HB determines that a partition has come up, it will create a new
* kthread and that kthread will call this function to attempt to set up the
@ -476,7 +620,7 @@ xpc_activating(void *__partid)
xpc_allow_hb(partid);
if (xpc_setup_infrastructure(part) == xpSuccess) {
if (xpc_setup_ch_structures(part) == xpSuccess) {
(void)xpc_part_ref(part); /* this will always succeed */
if (xpc_make_first_contact(part) == xpSuccess) {
@ -486,7 +630,7 @@ xpc_activating(void *__partid)
}
xpc_part_deref(part);
xpc_teardown_infrastructure(part);
xpc_teardown_ch_structures(part);
}
xpc_disallow_hb(partid);
@ -806,6 +950,56 @@ xpc_disconnect_wait(int ch_number)
}
}
static int
xpc_setup_partitions(void)
{
short partid;
struct xpc_partition *part;
xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
xp_max_npartitions, GFP_KERNEL);
if (xpc_partitions == NULL) {
dev_err(xpc_part, "can't get memory for partition structure\n");
return -ENOMEM;
}
/*
* The first few fields of each entry of xpc_partitions[] need to
* be initialized now so that calls to xpc_connect() and
* xpc_disconnect() can be made prior to the activation of any remote
* partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
* ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
* PARTITION HAS BEEN ACTIVATED.
*/
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
part->activate_IRQ_rcvd = 0;
spin_lock_init(&part->act_lock);
part->act_state = XPC_P_AS_INACTIVE;
XPC_SET_REASON(part, 0, 0);
init_timer(&part->disengage_timer);
part->disengage_timer.function =
xpc_timeout_partition_disengage;
part->disengage_timer.data = (unsigned long)part;
part->setup_state = XPC_P_SS_UNSET;
init_waitqueue_head(&part->teardown_wq);
atomic_set(&part->references, 0);
}
return xpc_setup_partitions_sn();
}
static void
xpc_teardown_partitions(void)
{
kfree(xpc_partitions);
}
static void
xpc_do_exit(enum xp_retval reason)
{
@ -892,8 +1086,7 @@ xpc_do_exit(enum xp_retval reason)
DBUG_ON(xpc_any_partition_engaged());
DBUG_ON(xpc_any_hbs_allowed() != 0);
/* a zero timestamp indicates our rsvd page is not initialized */
xpc_rsvd_page->ts_jiffies = 0;
xpc_teardown_rsvd_page();
if (reason == xpUnloading) {
(void)unregister_die_notifier(&xpc_die_notifier);
@ -906,7 +1099,7 @@ xpc_do_exit(enum xp_retval reason)
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
xpc_teardown_partitions();
if (is_shub())
xpc_exit_sn2();
@ -1062,8 +1255,6 @@ int __init
xpc_init(void)
{
int ret;
short partid;
struct xpc_partition *part;
struct task_struct *kthread;
snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
@ -1076,56 +1267,29 @@ xpc_init(void)
* further to only support exactly 64 partitions on this
* architecture, no less.
*/
if (xp_max_npartitions != 64)
return -EINVAL;
ret = xpc_init_sn2();
if (ret != 0)
return ret;
if (xp_max_npartitions != 64) {
dev_err(xpc_part, "max #of partitions not set to 64\n");
ret = -EINVAL;
} else {
ret = xpc_init_sn2();
}
} else if (is_uv()) {
xpc_init_uv();
ret = xpc_init_uv();
} else {
return -ENODEV;
ret = -ENODEV;
}
xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
xp_max_npartitions, GFP_KERNEL);
if (xpc_partitions == NULL) {
if (ret != 0)
return ret;
ret = xpc_setup_partitions();
if (ret != 0) {
dev_err(xpc_part, "can't get memory for partition structure\n");
ret = -ENOMEM;
goto out_1;
}
/*
* The first few fields of each entry of xpc_partitions[] need to
* be initialized now so that calls to xpc_connect() and
* xpc_disconnect() can be made prior to the activation of any remote
* partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
* ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
* PARTITION HAS BEEN ACTIVATED.
*/
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
part->activate_IRQ_rcvd = 0;
spin_lock_init(&part->act_lock);
part->act_state = XPC_P_AS_INACTIVE;
XPC_SET_REASON(part, 0, 0);
init_timer(&part->disengage_timer);
part->disengage_timer.function =
xpc_timeout_partition_disengage;
part->disengage_timer.data = (unsigned long)part;
part->setup_state = XPC_P_SS_UNSET;
init_waitqueue_head(&part->teardown_wq);
atomic_set(&part->references, 0);
}
xpc_sysctl = register_sysctl_table(xpc_sys_dir);
/*
@ -1133,10 +1297,9 @@ xpc_init(void)
* other partitions to discover we are alive and establish initial
* communications.
*/
xpc_rsvd_page = xpc_setup_rsvd_page();
if (xpc_rsvd_page == NULL) {
ret = xpc_setup_rsvd_page();
if (ret != 0) {
dev_err(xpc_part, "can't setup our reserved page\n");
ret = -EBUSY;
goto out_2;
}
@ -1187,15 +1350,15 @@ xpc_init(void)
/* initialization was not successful */
out_3:
/* a zero timestamp indicates our rsvd page is not initialized */
xpc_rsvd_page->ts_jiffies = 0;
xpc_teardown_rsvd_page();
(void)unregister_die_notifier(&xpc_die_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
out_2:
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
xpc_teardown_partitions();
out_1:
if (is_shub())
xpc_exit_sn2();

28
drivers/misc/sgi-xp/xpc_partition.c
View file

@ -73,6 +73,12 @@ xpc_get_rsvd_page_pa(int nasid)
while (1) {
/* !!! rp_pa will need to be _gpa on UV.
* ??? So do we save it into the architecture specific parts
* ??? of the xpc_partition structure? Do we rename this
* ??? function or have two versions? Rename rp_pa for UV to
* ??? rp_gpa?
*/
ret = xpc_get_partition_rsvd_page_pa(buf, &cookie, &rp_pa,
&len);
@ -118,9 +124,10 @@ xpc_get_rsvd_page_pa(int nasid)
* other partitions to discover we are alive and establish initial
* communications.
*/
struct xpc_rsvd_page *
int
xpc_setup_rsvd_page(void)
{
int ret;
struct xpc_rsvd_page *rp;
unsigned long rp_pa;
unsigned long new_ts_jiffies;
@ -132,7 +139,7 @@ xpc_setup_rsvd_page(void)
preempt_enable();
if (rp_pa == 0) {
dev_err(xpc_part, "SAL failed to locate the reserved page\n");
return NULL;
return -ESRCH;
}
rp = (struct xpc_rsvd_page *)__va(rp_pa);
@ -146,7 +153,7 @@ xpc_setup_rsvd_page(void)
dev_err(xpc_part, "the reserved page's partid of %d is outside "
"supported range (< 0 || >= %d)\n", rp->SAL_partid,
xp_max_npartitions);
return NULL;
return -EINVAL;
}
rp->version = XPC_RP_VERSION;
@ -165,8 +172,9 @@ xpc_setup_rsvd_page(void)
xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp);
if (xpc_rsvd_page_init(rp) != xpSuccess)
return NULL;
ret = xpc_setup_rsvd_page_sn(rp);
if (ret != 0)
return ret;
/*
* Set timestamp of when reserved page was setup by XPC.
@ -178,7 +186,15 @@ xpc_setup_rsvd_page(void)
new_ts_jiffies++;
rp->ts_jiffies = new_ts_jiffies;
return rp;
xpc_rsvd_page = rp;
return 0;
}
void
xpc_teardown_rsvd_page(void)
{
/* a zero timestamp indicates our rsvd page is not initialized */
xpc_rsvd_page->ts_jiffies = 0;
}
/*

387
drivers/misc/sgi-xp/xpc_sn2.c
View file

@ -53,12 +53,19 @@
* Buffer used to store a local copy of portions of a remote partition's
* reserved page (either its header and part_nasids mask, or its vars).
*/
static char *xpc_remote_copy_buffer_sn2;
static void *xpc_remote_copy_buffer_base_sn2;
static char *xpc_remote_copy_buffer_sn2;
static struct xpc_vars_sn2 *xpc_vars_sn2;
static struct xpc_vars_part_sn2 *xpc_vars_part_sn2;
static int
xpc_setup_partitions_sn_sn2(void)
{
/* nothing needs to be done */
return 0;
}
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access_sn2;
static u64 xpc_sh2_IPI_access0_sn2;
@ -198,7 +205,12 @@ xpc_init_IRQ_amo_sn2(int index)
static irqreturn_t
xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
{
atomic_inc(&xpc_activate_IRQ_rcvd);
unsigned long irq_flags;
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
xpc_activate_IRQ_rcvd++;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
wake_up_interruptible(&xpc_activate_IRQ_wq);
return IRQ_HANDLED;
}
@ -222,6 +234,7 @@ xpc_send_activate_IRQ_sn2(unsigned long amos_page_pa, int from_nasid,
static void
xpc_send_local_activate_IRQ_sn2(int from_nasid)
{
unsigned long irq_flags;
struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
@ -230,7 +243,10 @@ xpc_send_local_activate_IRQ_sn2(int from_nasid)
FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
FETCHOP_OR, BIT_MASK(from_nasid / 2));
atomic_inc(&xpc_activate_IRQ_rcvd);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
xpc_activate_IRQ_rcvd++;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
wake_up_interruptible(&xpc_activate_IRQ_wq);
}
@ -375,7 +391,7 @@ static void
xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch,
unsigned long *irq_flags)
{
struct xpc_openclose_args *args = ch->local_openclose_args;
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->reason = ch->reason;
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags);
@ -390,7 +406,7 @@ xpc_send_chctl_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
static void
xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_openclose_args *args = ch->local_openclose_args;
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->msg_size = ch->msg_size;
args->local_nentries = ch->local_nentries;
@ -400,11 +416,11 @@ xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
static void
xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_openclose_args *args = ch->local_openclose_args;
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->remote_nentries = ch->remote_nentries;
args->local_nentries = ch->local_nentries;
args->local_msgqueue_pa = xp_pa(ch->local_msgqueue);
args->local_msgqueue_pa = xp_pa(ch->sn.sn2.local_msgqueue);
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags);
}
@ -420,6 +436,13 @@ xpc_send_chctl_local_msgrequest_sn2(struct xpc_channel *ch)
XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
}
static void
xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
unsigned long msgqueue_pa)
{
ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
}
/*
* This next set of functions are used to keep track of when a partition is
* potentially engaged in accessing memory belonging to another partition.
@ -489,6 +512,17 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
part_sn2->activate_IRQ_phys_cpuid);
}
static void
xpc_assume_partition_disengaged_sn2(short partid)
{
struct amo *amo = xpc_vars_sn2->amos_page +
XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~BIT(partid));
}
static int
xpc_partition_engaged_sn2(short partid)
{
@ -510,17 +544,6 @@ xpc_any_partition_engaged_sn2(void)
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
}
static void
xpc_assume_partition_disengaged_sn2(short partid)
{
struct amo *amo = xpc_vars_sn2->amos_page +
XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
~BIT(partid));
}
/* original protection values for each node */
static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
@ -595,8 +618,8 @@ xpc_get_partition_rsvd_page_pa_sn2(void *buf, u64 *cookie, unsigned long *rp_pa,
}
static enum xp_retval
xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
static int
xpc_setup_rsvd_page_sn_sn2(struct xpc_rsvd_page *rp)
{
struct amo *amos_page;
int i;
@ -627,7 +650,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
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");
return xpNoMemory;
return -ENOMEM;
}
/*
@ -639,7 +662,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
dev_err(xpc_part, "can't allow amo operations\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1);
return ret;
return -EPERM;
}
}
@ -665,7 +688,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
(void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
return xpSuccess;
return 0;
}
static void
@ -1082,10 +1105,19 @@ xpc_identify_activate_IRQ_sender_sn2(void)
}
static void
xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected)
xpc_process_activate_IRQ_rcvd_sn2(void)
{
unsigned long irq_flags;
int n_IRQs_expected;
int n_IRQs_detected;
DBUG_ON(xpc_activate_IRQ_rcvd == 0);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
n_IRQs_expected = xpc_activate_IRQ_rcvd;
xpc_activate_IRQ_rcvd = 0;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) {
/* retry once to help avoid missing amo */
@ -1094,116 +1126,63 @@ xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected)
}
/*
* Guarantee that the kzalloc'd memory is cacheline aligned.
*/
static void *
xpc_kzalloc_cacheline_aligned_sn2(size_t size, gfp_t flags, void **base)
{
/* see if kzalloc will give us cachline aligned memory by default */
*base = kzalloc(size, flags);
if (*base == NULL)
return NULL;
if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
return *base;
kfree(*base);
/* nope, we'll have to do it ourselves */
*base = kzalloc(size + L1_CACHE_BYTES, flags);
if (*base == NULL)
return NULL;
return (void *)L1_CACHE_ALIGN((u64)*base);
}
/*
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
* Setup the channel structures that are sn2 specific.
*/
static enum xp_retval
xpc_setup_infrastructure_sn2(struct xpc_partition *part)
xpc_setup_ch_structures_sn_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
struct xpc_channel_sn2 *ch_sn2;
enum xp_retval retval;
int ret;
int cpuid;
int ch_number;
struct xpc_channel *ch;
struct timer_list *timer;
short partid = XPC_PARTID(part);
/*
* Allocate all of the channel structures as a contiguous chunk of
* memory.
*/
DBUG_ON(part->channels != NULL);
part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_MAX_NCHANNELS,
GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
return xpNoMemory;
}
/* allocate all the required GET/PUT values */
part_sn2->local_GPs =
xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL,
&part_sn2->local_GPs_base);
xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
&part_sn2->local_GPs_base);
if (part_sn2->local_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for local get/put "
"values\n");
retval = xpNoMemory;
goto out_1;
return xpNoMemory;
}
part_sn2->remote_GPs =
xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL,
&part_sn2->remote_GPs_base);
xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
&part_sn2->remote_GPs_base);
if (part_sn2->remote_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for remote get/put "
"values\n");
retval = xpNoMemory;
goto out_2;
goto out_1;
}
part_sn2->remote_GPs_pa = 0;
/* allocate all the required open and close args */
part->local_openclose_args =
xpc_kzalloc_cacheline_aligned_sn2(XPC_OPENCLOSE_ARGS_SIZE,
GFP_KERNEL,
&part->local_openclose_args_base);
if (part->local_openclose_args == NULL) {
part_sn2->local_openclose_args =
xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
GFP_KERNEL, &part_sn2->
local_openclose_args_base);
if (part_sn2->local_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for local connect args\n");
retval = xpNoMemory;
goto out_3;
}
part->remote_openclose_args =
xpc_kzalloc_cacheline_aligned_sn2(XPC_OPENCLOSE_ARGS_SIZE,
GFP_KERNEL,
&part->remote_openclose_args_base);
if (part->remote_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for remote connect args\n");
retval = xpNoMemory;
goto out_4;
goto out_2;
}
part_sn2->remote_openclose_args_pa = 0;
part_sn2->local_chctl_amo_va = xpc_init_IRQ_amo_sn2(partid);
part->chctl.all_flags = 0;
spin_lock_init(&part->chctl_lock);
part_sn2->notify_IRQ_nasid = 0;
part_sn2->notify_IRQ_phys_cpuid = 0;
part_sn2->remote_chctl_amo_va = NULL;
atomic_set(&part->channel_mgr_requests, 1);
init_waitqueue_head(&part->channel_mgr_wq);
sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid);
ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2,
IRQF_SHARED, part_sn2->notify_IRQ_owner,
@ -1212,7 +1191,7 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part)
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
"errno=%d\n", -ret);
retval = xpLackOfResources;
goto out_5;
goto out_3;
}
/* Setup a timer to check for dropped notify IRQs */
@ -1224,44 +1203,16 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part)
timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
add_timer(timer);
part->nchannels = XPC_MAX_NCHANNELS;
atomic_set(&part->nchannels_active, 0);
atomic_set(&part->nchannels_engaged, 0);
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
ch_sn2 = &part->channels[ch_number].sn.sn2;
ch->partid = partid;
ch->number = ch_number;
ch->flags = XPC_C_DISCONNECTED;
ch_sn2->local_GP = &part_sn2->local_GPs[ch_number];
ch_sn2->local_openclose_args =
&part_sn2->local_openclose_args[ch_number];
ch->sn.sn2.local_GP = &part_sn2->local_GPs[ch_number];
ch->local_openclose_args =
&part->local_openclose_args[ch_number];
atomic_set(&ch->kthreads_assigned, 0);
atomic_set(&ch->kthreads_idle, 0);
atomic_set(&ch->kthreads_active, 0);
atomic_set(&ch->references, 0);
atomic_set(&ch->n_to_notify, 0);
spin_lock_init(&ch->lock);
mutex_init(&ch->sn.sn2.msg_to_pull_mutex);
init_completion(&ch->wdisconnect_wait);
atomic_set(&ch->n_on_msg_allocate_wq, 0);
init_waitqueue_head(&ch->msg_allocate_wq);
init_waitqueue_head(&ch->idle_wq);
mutex_init(&ch_sn2->msg_to_pull_mutex);
}
/*
* With the setting of the partition setup_state to XPC_P_SS_SETUP,
* we're declaring that this partition is ready to go.
*/
part->setup_state = XPC_P_SS_SETUP;
/*
* Setup the per partition specific variables required by the
* remote partition to establish channel connections with us.
@ -1271,7 +1222,7 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part)
*/
xpc_vars_part_sn2[partid].GPs_pa = xp_pa(part_sn2->local_GPs);
xpc_vars_part_sn2[partid].openclose_args_pa =
xp_pa(part->local_openclose_args);
xp_pa(part_sn2->local_openclose_args);
xpc_vars_part_sn2[partid].chctl_amo_pa =
xp_pa(part_sn2->local_chctl_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
@ -1279,80 +1230,48 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part)
xpc_vars_part_sn2[partid].notify_IRQ_phys_cpuid =
cpu_physical_id(cpuid);
xpc_vars_part_sn2[partid].nchannels = part->nchannels;
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1;
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1_SN2;
return xpSuccess;
/* setup of infrastructure failed */
out_5:
kfree(part->remote_openclose_args_base);
part->remote_openclose_args = NULL;
out_4:
kfree(part->local_openclose_args_base);
part->local_openclose_args = NULL;
/* setup of ch structures failed */
out_3:
kfree(part_sn2->local_openclose_args_base);
part_sn2->local_openclose_args = NULL;
out_2:
kfree(part_sn2->remote_GPs_base);
part_sn2->remote_GPs = NULL;
out_2:
out_1:
kfree(part_sn2->local_GPs_base);
part_sn2->local_GPs = NULL;
out_1:
kfree(part->channels);
part->channels = NULL;
return retval;
}
/*
* Teardown the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
* Teardown the channel structures that are sn2 specific.
*/
static void
xpc_teardown_infrastructure_sn2(struct xpc_partition *part)
xpc_teardown_ch_structures_sn_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
short partid = XPC_PARTID(part);
/*
* We start off by making this partition inaccessible to local
* processes by marking it as no longer setup. Then we make it
* inaccessible to remote processes by clearing the XPC per partition
* specific variable's magic # (which indicates that these variables
* are no longer valid) and by ignoring all XPC notify IRQs sent to
* this partition.
* Indicate that the variables specific to the remote partition are no
* longer available for its use.
*/
DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
DBUG_ON(atomic_read(&part->nchannels_active) != 0);
DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
part->setup_state = XPC_P_SS_WTEARDOWN;
xpc_vars_part_sn2[partid].magic = 0;
free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
/*
* Before proceeding with the teardown we have to wait until all
* existing references cease.
*/
wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
/* now we can begin tearing down the infrastructure */
part->setup_state = XPC_P_SS_TORNDOWN;
/* in case we've still got outstanding timers registered... */
del_timer_sync(&part_sn2->dropped_notify_IRQ_timer);
free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
kfree(part->remote_openclose_args_base);
part->remote_openclose_args = NULL;
kfree(part->local_openclose_args_base);
part->local_openclose_args = NULL;
kfree(part_sn2->local_openclose_args_base);
part_sn2->local_openclose_args = NULL;
kfree(part_sn2->remote_GPs_base);
part_sn2->remote_GPs = NULL;
kfree(part_sn2->local_GPs_base);
part_sn2->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
part_sn2->local_chctl_amo_va = NULL;
}
@ -1429,8 +1348,8 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
/* see if they've been set up yet */
if (pulled_entry->magic != XPC_VP_MAGIC1 &&
pulled_entry->magic != XPC_VP_MAGIC2) {
if (pulled_entry->magic != XPC_VP_MAGIC1_SN2 &&
pulled_entry->magic != XPC_VP_MAGIC2_SN2) {
if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
@ -1443,7 +1362,7 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
return xpRetry;
}
if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1) {
if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1_SN2) {
/* validate the variables */
@ -1473,10 +1392,10 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
/* let the other side know that we've pulled their variables */
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2;
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2_SN2;
}
if (pulled_entry->magic == XPC_VP_MAGIC1)
if (pulled_entry->magic == XPC_VP_MAGIC1_SN2)
return xpRetry;
return xpSuccess;
@ -1605,6 +1524,7 @@ xpc_get_chctl_all_flags_sn2(struct xpc_partition *part)
static enum xp_retval
xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
unsigned long irq_flags;
int nentries;
size_t nbytes;
@ -1612,17 +1532,17 @@ xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
for (nentries = ch->local_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->local_msgqueue =
xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL,
&ch->local_msgqueue_base);
if (ch->local_msgqueue == NULL)
ch_sn2->local_msgqueue =
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
&ch_sn2->local_msgqueue_base);
if (ch_sn2->local_msgqueue == NULL)
continue;
nbytes = nentries * sizeof(struct xpc_notify);
ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
if (ch->notify_queue == NULL) {
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
if (ch_sn2->notify_queue == NULL) {
kfree(ch_sn2->local_msgqueue_base);
ch_sn2->local_msgqueue = NULL;
continue;
}
@ -1649,6 +1569,7 @@ xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
static enum xp_retval
xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
unsigned long irq_flags;
int nentries;
size_t nbytes;
@ -1658,10 +1579,10 @@ xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->remote_msgqueue =
xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL,
&ch->remote_msgqueue_base);
if (ch->remote_msgqueue == NULL)
ch_sn2->remote_msgqueue =
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
remote_msgqueue_base);
if (ch_sn2->remote_msgqueue == NULL)
continue;
spin_lock_irqsave(&ch->lock, irq_flags);
@ -1687,8 +1608,9 @@ xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
* Note: Assumes all of the channel sizes are filled in.
*/
static enum xp_retval
xpc_allocate_msgqueues_sn2(struct xpc_channel *ch)
xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
enum xp_retval ret;
DBUG_ON(ch->flags & XPC_C_SETUP);
@ -1698,10 +1620,10 @@ xpc_allocate_msgqueues_sn2(struct xpc_channel *ch)
ret = xpc_allocate_remote_msgqueue_sn2(ch);
if (ret != xpSuccess) {
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
kfree(ch->notify_queue);
ch->notify_queue = NULL;
kfree(ch_sn2->local_msgqueue_base);
ch_sn2->local_msgqueue = NULL;
kfree(ch_sn2->notify_queue);
ch_sn2->notify_queue = NULL;
}
}
return ret;
@ -1715,21 +1637,13 @@ xpc_allocate_msgqueues_sn2(struct xpc_channel *ch)
* they're cleared when XPC_C_DISCONNECTED is cleared.
*/
static void
xpc_free_msgqueues_sn2(struct xpc_channel *ch)
xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
DBUG_ON(!spin_is_locked(&ch->lock));
DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
ch->remote_msgqueue_pa = 0;
ch->func = NULL;
ch->key = NULL;
ch->msg_size = 0;
ch->local_nentries = 0;
ch->remote_nentries = 0;
ch->kthreads_assigned_limit = 0;
ch->kthreads_idle_limit = 0;
ch_sn2->remote_msgqueue_pa = 0;
ch_sn2->local_GP->get = 0;
ch_sn2->local_GP->put = 0;
@ -1745,12 +1659,12 @@ xpc_free_msgqueues_sn2(struct xpc_channel *ch)
dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
ch->flags, ch->partid, ch->number);
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
kfree(ch->remote_msgqueue_base);
ch->remote_msgqueue = NULL;
kfree(ch->notify_queue);
ch->notify_queue = NULL;
kfree(ch_sn2->local_msgqueue_base);
ch_sn2->local_msgqueue = NULL;
kfree(ch_sn2->remote_msgqueue_base);
ch_sn2->remote_msgqueue = NULL;
kfree(ch_sn2->notify_queue);
ch_sn2->notify_queue = NULL;
}
}
@ -1766,7 +1680,7 @@ xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
notify = &ch->notify_queue[get % ch->local_nentries];
notify = &ch->sn.sn2.notify_queue[get % ch->local_nentries];
/*
* See if the notify entry indicates it was associated with
@ -1818,7 +1732,7 @@ xpc_clear_local_msgqueue_flags_sn2(struct xpc_channel *ch)
get = ch_sn2->w_remote_GP.get;
do {
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(get % ch->local_nentries) *
ch->msg_size);
msg->flags = 0;
@ -1837,7 +1751,7 @@ xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch)
put = ch_sn2->w_remote_GP.put;
do {
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(put % ch->remote_nentries) *
ch->msg_size);
msg->flags = 0;
@ -1976,8 +1890,9 @@ xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
}
msg_offset = msg_index * ch->msg_size;
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
remote_msg_pa = ch->remote_msgqueue_pa + msg_offset;
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
msg_offset);
remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;
ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
nmsgs * ch->msg_size);
@ -2001,7 +1916,7 @@ xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
/* return the message we were looking for */
msg_offset = (get % ch->remote_nentries) * ch->msg_size;
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue + msg_offset);
return msg;
}
@ -2080,7 +1995,7 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
if (put == ch_sn2->w_local_GP.put)
break;
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) *
ch->msg_size);
@ -2182,7 +2097,7 @@ xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
}
/* get the message's address and initialize it */
msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);
DBUG_ON(msg->flags != 0);
@ -2207,6 +2122,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
void *key)
{
enum xp_retval ret = xpSuccess;
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg = msg;
struct xpc_notify *notify = notify;
s64 msg_number;
@ -2243,7 +2159,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
atomic_inc(&ch->n_to_notify);
notify = &ch->notify_queue[msg_number % ch->local_nentries];
notify = &ch_sn2->notify_queue[msg_number % ch->local_nentries];
notify->func = func;
notify->key = key;
notify->type = notify_type;
@ -2279,7 +2195,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload,
/* see if the message is next in line to be sent, if so send it */
put = ch->sn.sn2.local_GP->put;
put = ch_sn2->local_GP->put;
if (put == msg_number)
xpc_send_msgs_sn2(ch, put);
@ -2307,7 +2223,7 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
if (get == ch_sn2->w_local_GP.get)
break;
msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(get % ch->remote_nentries) *
ch->msg_size);
@ -2385,8 +2301,9 @@ xpc_init_sn2(void)
int ret;
size_t buf_size;
xpc_setup_partitions_sn = xpc_setup_partitions_sn_sn2;
xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_sn2;
xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
xpc_offline_heartbeat = xpc_offline_heartbeat_sn2;
xpc_online_heartbeat = xpc_online_heartbeat_sn2;
@ -2403,29 +2320,33 @@ xpc_init_sn2(void)
xpc_cancel_partition_deactivation_request_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_setup_ch_structures_sn = xpc_setup_ch_structures_sn_sn2;
xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_sn2;
xpc_make_first_contact = xpc_make_first_contact_sn2;
xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2;
xpc_allocate_msgqueues = xpc_allocate_msgqueues_sn2;
xpc_free_msgqueues = xpc_free_msgqueues_sn2;
xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_sn2;
xpc_setup_msg_structures = xpc_setup_msg_structures_sn2;
xpc_teardown_msg_structures = xpc_teardown_msg_structures_sn2;
xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2;
xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2;
xpc_n_of_deliverable_msgs = xpc_n_of_deliverable_msgs_sn2;
xpc_get_deliverable_msg = xpc_get_deliverable_msg_sn2;
xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_sn2;
xpc_partition_engaged = xpc_partition_engaged_sn2;
xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
xpc_indicate_partition_disengaged =
xpc_indicate_partition_disengaged_sn2;
xpc_partition_engaged = xpc_partition_engaged_sn2;
xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2;
xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;

789
drivers/misc/sgi-xp/xpc_uv.c
View file

@ -14,41 +14,528 @@
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <asm/uv/uv_hub.h>
#include "../sgi-gru/gru.h"
#include "../sgi-gru/grukservices.h"
#include "xpc.h"
static atomic64_t xpc_heartbeat_uv;
static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
static void *xpc_activate_mq;
#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
#define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
XPC_ACTIVATE_MSG_SIZE_UV)
#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
XPC_NOTIFY_MSG_SIZE_UV)
static void *xpc_activate_mq_uv;
static void *xpc_notify_mq_uv;
static int
xpc_setup_partitions_sn_uv(void)
{
short partid;
struct xpc_partition_uv *part_uv;
for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
part_uv = &xpc_partitions[partid].sn.uv;
spin_lock_init(&part_uv->flags_lock);
part_uv->remote_act_state = XPC_P_AS_INACTIVE;
}
return 0;
}
static void *
xpc_create_gru_mq_uv(unsigned int mq_size, int cpuid, unsigned int irq,
irq_handler_t irq_handler)
{
int ret;
int nid;
int mq_order;
struct page *page;
void *mq;
nid = cpu_to_node(cpuid);
mq_order = get_order(mq_size);
page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
mq_order);
if (page == NULL)
return NULL;
mq = page_address(page);
ret = gru_create_message_queue(mq, mq_size);
if (ret != 0) {
dev_err(xpc_part, "gru_create_message_queue() returned "
"error=%d\n", ret);
free_pages((unsigned long)mq, mq_order);
return NULL;
}
/* !!! Need to do some other things to set up IRQ */
ret = request_irq(irq, irq_handler, 0, "xpc", NULL);
if (ret != 0) {
dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
irq, ret);
free_pages((unsigned long)mq, mq_order);
return NULL;
}
/* !!! enable generation of irq when GRU mq op occurs to this mq */
/* ??? allow other partitions to access GRU mq? */
return mq;
}
static void
xpc_send_local_activate_IRQ_uv(struct xpc_partition *part)
xpc_destroy_gru_mq_uv(void *mq, unsigned int mq_size, unsigned int irq)
{
/*
* !!! Make our side think that the remote parition sent an activate
* !!! message our way. Also do what the activate IRQ handler would
* !!! do had one really been sent.
*/
/* ??? disallow other partitions to access GRU mq? */
/* !!! disable generation of irq when GRU mq op occurs to this mq */
free_irq(irq, NULL);
free_pages((unsigned long)mq, get_order(mq_size));
}
static enum xp_retval
xpc_rsvd_page_init_uv(struct xpc_rsvd_page *rp)
xpc_send_gru_msg(unsigned long mq_gpa, void *msg, size_t msg_size)
{
/* !!! need to have established xpc_activate_mq earlier */
rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq);
return xpSuccess;
enum xp_retval xp_ret;
int ret;
while (1) {
ret = gru_send_message_gpa(mq_gpa, msg, msg_size);
if (ret == MQE_OK) {
xp_ret = xpSuccess;
break;
}
if (ret == MQE_QUEUE_FULL) {
dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
"error=MQE_QUEUE_FULL\n");
/* !!! handle QLimit reached; delay & try again */
/* ??? Do we add a limit to the number of retries? */
(void)msleep_interruptible(10);
} else if (ret == MQE_CONGESTION) {
dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
"error=MQE_CONGESTION\n");
/* !!! handle LB Overflow; simply try again */
/* ??? Do we add a limit to the number of retries? */
} else {
/* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
dev_err(xpc_chan, "gru_send_message_gpa() returned "
"error=%d\n", ret);
xp_ret = xpGruSendMqError;
break;
}
}
return xp_ret;
}
static void
xpc_process_activate_IRQ_rcvd_uv(void)
{
unsigned long irq_flags;
short partid;
struct xpc_partition *part;
u8 act_state_req;
DBUG_ON(xpc_activate_IRQ_rcvd == 0);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
part = &xpc_partitions[partid];
if (part->sn.uv.act_state_req == 0)
continue;
xpc_activate_IRQ_rcvd--;
BUG_ON(xpc_activate_IRQ_rcvd < 0);
act_state_req = part->sn.uv.act_state_req;
part->sn.uv.act_state_req = 0;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
if (part->act_state == XPC_P_AS_INACTIVE)
xpc_activate_partition(part);
else if (part->act_state == XPC_P_AS_DEACTIVATING)
XPC_DEACTIVATE_PARTITION(part, xpReactivating);
} else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
if (part->act_state == XPC_P_AS_INACTIVE)
xpc_activate_partition(part);
else
XPC_DEACTIVATE_PARTITION(part, xpReactivating);
} else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
} else {
BUG();
}
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (xpc_activate_IRQ_rcvd == 0)
break;
}
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
}
static irqreturn_t
xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
{
unsigned long irq_flags;
struct xpc_activate_mq_msghdr_uv *msg_hdr;
short partid;
struct xpc_partition *part;
struct xpc_partition_uv *part_uv;
struct xpc_openclose_args *args;
int wakeup_hb_checker = 0;
while ((msg_hdr = gru_get_next_message(xpc_activate_mq_uv)) != NULL) {
partid = msg_hdr->partid;
if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() invalid"
"partid=0x%x passed in message\n", partid);
gru_free_message(xpc_activate_mq_uv, msg_hdr);
continue;
}
part = &xpc_partitions[partid];
part_uv = &part->sn.uv;
part_uv->remote_act_state = msg_hdr->act_state;
switch (msg_hdr->type) {
case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
/* syncing of remote_act_state was just done above */
break;
case XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV: {
struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
msg_hdr;
part_uv->heartbeat = msg->heartbeat;
break;
}
case XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV: {
struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
msg_hdr;
part_uv->heartbeat = msg->heartbeat;
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags |= XPC_P_HEARTBEAT_OFFLINE_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
}
case XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV: {
struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
msg_hdr;
part_uv->heartbeat = msg->heartbeat;
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_HEARTBEAT_OFFLINE_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
}
case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_activate_req_uv *msg;
/*
* ??? Do we deal here with ts_jiffies being different
* ??? if act_state != XPC_P_AS_INACTIVE instead of
* ??? below?
*/
msg = (struct xpc_activate_mq_msg_activate_req_uv *)
msg_hdr;
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
part_uv->remote_activate_mq_gpa = msg->activate_mq_gpa;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
wakeup_hb_checker++;
break;
}
case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_deactivate_req_uv *msg;
msg = (struct xpc_activate_mq_msg_deactivate_req_uv *)
msg_hdr;
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
part_uv->reason = msg->reason;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
wakeup_hb_checker++;
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
msg = (struct xpc_activate_mq_msg_chctl_closerequest_uv
*)msg_hdr;
args = &part->remote_openclose_args[msg->ch_number];
args->reason = msg->reason;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |=
XPC_CHCTL_CLOSEREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
msg = (struct xpc_activate_mq_msg_chctl_closereply_uv *)
msg_hdr;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |=
XPC_CHCTL_CLOSEREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
msg = (struct xpc_activate_mq_msg_chctl_openrequest_uv
*)msg_hdr;
args = &part->remote_openclose_args[msg->ch_number];
args->msg_size = msg->msg_size;
args->local_nentries = msg->local_nentries;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |=
XPC_CHCTL_OPENREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
msg = (struct xpc_activate_mq_msg_chctl_openreply_uv *)
msg_hdr;
args = &part->remote_openclose_args[msg->ch_number];
args->remote_nentries = msg->remote_nentries;
args->local_nentries = msg->local_nentries;
args->local_msgqueue_pa = msg->local_notify_mq_gpa;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |=
XPC_CHCTL_OPENREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags |= XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
default:
dev_err(xpc_part, "received unknown activate_mq msg "
"type=%d from partition=%d\n", msg_hdr->type,
partid);
}
if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
part->remote_rp_ts_jiffies != 0) {
/*
* ??? Does what we do here need to be sensitive to
* ??? act_state or remote_act_state?
*/
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock,
irq_flags);
wakeup_hb_checker++;
}
gru_free_message(xpc_activate_mq_uv, msg_hdr);
}
if (wakeup_hb_checker)
wake_up_interruptible(&xpc_activate_IRQ_wq);
return IRQ_HANDLED;
}
static enum xp_retval
xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
int msg_type)
{
struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
msg_hdr->type = msg_type;
msg_hdr->partid = XPC_PARTID(part);
msg_hdr->act_state = part->act_state;
msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
/* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
return xpc_send_gru_msg(part->sn.uv.remote_activate_mq_gpa, msg,
msg_size);
}
static void
xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
size_t msg_size, int msg_type)
{
enum xp_retval ret;
ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
if (unlikely(ret != xpSuccess))
XPC_DEACTIVATE_PARTITION(part, ret);
}
static void
xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
void *msg, size_t msg_size, int msg_type)
{
struct xpc_partition *part = &xpc_partitions[ch->number];
enum xp_retval ret;
ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
if (unlikely(ret != xpSuccess)) {
if (irq_flags != NULL)
spin_unlock_irqrestore(&ch->lock, *irq_flags);
XPC_DEACTIVATE_PARTITION(part, ret);
if (irq_flags != NULL)
spin_lock_irqsave(&ch->lock, *irq_flags);
}
}
static void
xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
{
unsigned long irq_flags;
struct xpc_partition_uv *part_uv = &part->sn.uv;
/*
* !!! Make our side think that the remote parition sent an activate
* !!! message our way by doing what the activate IRQ handler would
* !!! do had one really been sent.
*/
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = act_state_req;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
wake_up_interruptible(&xpc_activate_IRQ_wq);
}
static enum xp_retval
xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
size_t *len)
{
/* !!! call the UV version of sn_partition_reserved_page_pa() */
return xpUnsupported;
}
static int
xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
{
rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv);
return 0;
}
static void
xpc_send_heartbeat_uv(int msg_type)
{
short partid;
struct xpc_partition *part;
struct xpc_activate_mq_msg_heartbeat_req_uv msg;
/*
* !!! On uv we're broadcasting a heartbeat message every 5 seconds.
* !!! Whereas on sn2 we're bte_copy'ng the heartbeat info every 20
* !!! seconds. This is an increase in numalink traffic.
* ??? Is this good?
*/
msg.heartbeat = atomic64_inc_return(&xpc_heartbeat_uv);
partid = find_first_bit(xpc_heartbeating_to_mask_uv,
XP_MAX_NPARTITIONS_UV);
while (partid < XP_MAX_NPARTITIONS_UV) {
part = &xpc_partitions[partid];
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
msg_type);
partid = find_next_bit(xpc_heartbeating_to_mask_uv,
XP_MAX_NPARTITIONS_UV, partid + 1);
}
}
static void
xpc_increment_heartbeat_uv(void)
{
/* !!! send heartbeat msg to xpc_heartbeating_to_mask partids */
xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV);
}
static void
xpc_offline_heartbeat_uv(void)
{
xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV);
}
static void
xpc_online_heartbeat_uv(void)
{
xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV);
}
static void
xpc_heartbeat_init_uv(void)
{
atomic64_set(&xpc_heartbeat_uv, 0);
bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0];
}
@ -56,48 +543,94 @@ xpc_heartbeat_init_uv(void)
static void
xpc_heartbeat_exit_uv(void)
{
/* !!! send heartbeat_offline msg to xpc_heartbeating_to_mask partids */
xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV);
}
static enum xp_retval
xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
{
struct xpc_partition_uv *part_uv = &part->sn.uv;
enum xp_retval ret = xpNoHeartbeat;
if (part_uv->remote_act_state != XPC_P_AS_INACTIVE &&
part_uv->remote_act_state != XPC_P_AS_DEACTIVATING) {
if (part_uv->heartbeat != part->last_heartbeat ||
(part_uv->flags & XPC_P_HEARTBEAT_OFFLINE_UV)) {
part->last_heartbeat = part_uv->heartbeat;
ret = xpSuccess;
}
}
return ret;
}
static void
xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
unsigned long remote_rp_pa, int nasid)
unsigned long remote_rp_gpa, int nasid)
{
short partid = remote_rp->SAL_partid;
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_activate_mq_msg_activate_req_uv msg;
/*
* !!! Setup part structure with the bits of info we can glean from the rp:
* !!! part->remote_rp_pa = remote_rp_pa;
* !!! part->sn.uv.activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
*/
part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
part->sn.uv.remote_activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
xpc_send_local_activate_IRQ_uv(part);
/*
* ??? Is it a good idea to make this conditional on what is
* ??? potentially stale state information?
*/
if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
msg.rp_gpa = uv_gpa(xpc_rsvd_page);
msg.activate_mq_gpa = xpc_rsvd_page->sn.activate_mq_gpa;
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
}
if (part->act_state == XPC_P_AS_INACTIVE)
xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
}
static void
xpc_request_partition_reactivation_uv(struct xpc_partition *part)
{
xpc_send_local_activate_IRQ_uv(part);
xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
}
static void
xpc_request_partition_deactivation_uv(struct xpc_partition *part)
{
struct xpc_activate_mq_msg_deactivate_req_uv msg;
/*
* ??? Is it a good idea to make this conditional on what is
* ??? potentially stale state information?
*/
if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
msg.reason = part->reason;
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
}
}
/*
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
* Setup the channel structures that are uv specific.
*/
static enum xp_retval
xpc_setup_infrastructure_uv(struct xpc_partition *part)
xpc_setup_ch_structures_sn_uv(struct xpc_partition *part)
{
/* !!! this function needs fleshing out */
return xpUnsupported;
}
/*
* Teardown the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
* Teardown the channel structures that are uv specific.
*/
static void
xpc_teardown_infrastructure_uv(struct xpc_partition *part)
xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part)
{
/* !!! this function needs fleshing out */
return;
@ -106,15 +639,163 @@ xpc_teardown_infrastructure_uv(struct xpc_partition *part)
static enum xp_retval
xpc_make_first_contact_uv(struct xpc_partition *part)
{
/* !!! this function needs fleshing out */
return xpUnsupported;
struct xpc_activate_mq_msg_uv msg;
/*
* We send a sync msg to get the remote partition's remote_act_state
* updated to our current act_state which at this point should
* be XPC_P_AS_ACTIVATING.
*/
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) {
dev_dbg(xpc_part, "waiting to make first contact with "
"partition %d\n", XPC_PARTID(part));
/* wait a 1/4 of a second or so */
(void)msleep_interruptible(250);
if (part->act_state == XPC_P_AS_DEACTIVATING)
return part->reason;
}
return xpSuccess;
}
static u64
xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
{
unsigned long irq_flags;
union xpc_channel_ctl_flags chctl;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
chctl = part->chctl;
if (chctl.all_flags != 0)
part->chctl.all_flags = 0;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
return chctl.all_flags;
}
static enum xp_retval
xpc_setup_msg_structures_uv(struct xpc_channel *ch)
{
/* !!! this function needs fleshing out */
return 0UL;
return xpUnsupported;
}
static void
xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
{
struct xpc_channel_uv *ch_uv = &ch->sn.uv;
ch_uv->remote_notify_mq_gpa = 0;
/* !!! this function needs fleshing out */
}
static void
xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
msg.ch_number = ch->number;
msg.reason = ch->reason;
xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
}
static void
xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_activate_mq_msg_chctl_closereply_uv msg;
msg.ch_number = ch->number;
xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
}
static void
xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
msg.ch_number = ch->number;
msg.msg_size = ch->msg_size;
msg.local_nentries = ch->local_nentries;
xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
}
static void
xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
{
struct xpc_activate_mq_msg_chctl_openreply_uv msg;
msg.ch_number = ch->number;
msg.local_nentries = ch->local_nentries;
msg.remote_nentries = ch->remote_nentries;
msg.local_notify_mq_gpa = uv_gpa(xpc_notify_mq_uv);
xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
}
static void
xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
unsigned long msgqueue_pa)
{
ch->sn.uv.remote_notify_mq_gpa = msgqueue_pa;
}
static void
xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
{
struct xpc_activate_mq_msg_uv msg;
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
}
static void
xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
{
struct xpc_activate_mq_msg_uv msg;
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
}
static void
xpc_assume_partition_disengaged_uv(short partid)
{
struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
unsigned long irq_flags;
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
}
static int
xpc_partition_engaged_uv(short partid)
{
return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
}
static int
xpc_any_partition_engaged_uv(void)
{
struct xpc_partition_uv *part_uv;
short partid;
for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
part_uv = &xpc_partitions[partid].sn.uv;
if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
return 1;
}
return 0;
}
static struct xpc_msg *
@ -124,24 +805,64 @@ xpc_get_deliverable_msg_uv(struct xpc_channel *ch)
return NULL;
}
void
int
xpc_init_uv(void)
{
xpc_rsvd_page_init = xpc_rsvd_page_init_uv;
xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv;
xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv;
xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv;
xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv;
xpc_increment_heartbeat = xpc_increment_heartbeat_uv;
xpc_offline_heartbeat = xpc_offline_heartbeat_uv;
xpc_online_heartbeat = xpc_online_heartbeat_uv;
xpc_heartbeat_init = xpc_heartbeat_init_uv;
xpc_heartbeat_exit = xpc_heartbeat_exit_uv;
xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_uv;
xpc_request_partition_activation = xpc_request_partition_activation_uv;
xpc_request_partition_reactivation =
xpc_request_partition_reactivation_uv;
xpc_setup_infrastructure = xpc_setup_infrastructure_uv;
xpc_teardown_infrastructure = xpc_teardown_infrastructure_uv;
xpc_request_partition_deactivation =
xpc_request_partition_deactivation_uv;
xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv;
xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv;
xpc_make_first_contact = xpc_make_first_contact_uv;
xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv;
xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_uv;
xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv;
xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv;
xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv;
xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv;
xpc_setup_msg_structures = xpc_setup_msg_structures_uv;
xpc_teardown_msg_structures = xpc_teardown_msg_structures_uv;
xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_uv;
xpc_indicate_partition_disengaged =
xpc_indicate_partition_disengaged_uv;
xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_uv;
xpc_partition_engaged = xpc_partition_engaged_uv;
xpc_any_partition_engaged = xpc_any_partition_engaged_uv;
xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv;
/* ??? The cpuid argument's value is 0, is that what we want? */
/* !!! The irq argument's value isn't correct. */
xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, 0,
xpc_handle_activate_IRQ_uv);
if (xpc_activate_mq_uv == NULL)
return -ENOMEM;
return 0;
}
void
xpc_exit_uv(void)
{
/* !!! The irq argument's value isn't correct. */
xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
}