diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/sgi-xp/xpc.h | 124 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_channel.c | 135 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_main.c | 59 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_sn2.c | 301 | ||||
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_uv.c | 10 |
5 files changed, 327 insertions, 302 deletions
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h index b04cfbed958..26a1725f68a 100644 --- a/drivers/misc/sgi-xp/xpc.h +++ b/drivers/misc/sgi-xp/xpc.h @@ -186,9 +186,10 @@ struct xpc_vars_part_sn2 { u64 openclose_args_pa; /* physical address of open and close args */ u64 GPs_pa; /* physical address of Get/Put values */ - u64 IPI_amo_pa; /* physical address of IPI AMO_t structure */ - int IPI_nasid; /* nasid of where to send IPIs */ - int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */ + u64 chctl_amo_pa; /* physical address of chctl flags' AMO_t */ + + int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ + int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ u8 nchannels; /* #of defined channels supported */ @@ -407,7 +408,7 @@ struct xpc_channel { atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ - u8 delayed_IPI_flags; /* IPI flags received, but delayed */ + 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 */ @@ -470,6 +471,54 @@ struct xpc_channel { #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ /* + * The channel control flags (chctl) union consists of a 64-bit variable which + * is divided up into eight bytes, ordered from right to left. Byte zero + * pertains to channel 0, byte one to channel 1, and so on. Each channel's byte + * can have one or more of the chctl flags set in it. + */ + +union xpc_channel_ctl_flags { + u64 all_flags; + u8 flags[XPC_MAX_NCHANNELS]; +}; + +/* chctl flags */ +#define XPC_CHCTL_CLOSEREQUEST 0x01 +#define XPC_CHCTL_CLOSEREPLY 0x02 +#define XPC_CHCTL_OPENREQUEST 0x04 +#define XPC_CHCTL_OPENREPLY 0x08 +#define XPC_CHCTL_MSGREQUEST 0x10 + +#define XPC_OPENCLOSE_CHCTL_FLAGS \ + (XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \ + XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY) +#define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST + +static inline int +xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl) +{ + int ch_number; + + for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { + if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) + return 1; + } + return 0; +} + +static inline int +xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl) +{ + int ch_number; + + for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { + if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS) + return 1; + } + return 0; +} + +/* * Manages channels on a partition basis. There is one of these structures * for each partition (a partition will never utilize the structure that * represents itself). @@ -494,12 +543,12 @@ struct xpc_partition_sn2 { u64 remote_openclose_args_pa; /* phys addr of remote's args */ - int remote_IPI_nasid; /* nasid of where to send IPIs */ - int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ - char IPI_owner[8]; /* IPI owner's name */ + int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ + int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ + char notify_IRQ_owner[8]; /* notify IRQ's owner's name */ - AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */ - AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */ + AMO_t *remote_chctl_amo_va; /* address of remote chctl flags' AMO_t */ + AMO_t *local_chctl_amo_va; /* address of chctl flags' AMO_t */ struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */ }; @@ -536,7 +585,10 @@ struct xpc_partition { atomic_t nchannels_engaged; /* #of channels engaged with remote part */ struct xpc_channel *channels; /* array of channel structures */ - /* fields used to pass args when opening or closing a channel */ + /* fields used for managing channel avialability and activity */ + + 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 */ @@ -544,11 +596,6 @@ struct xpc_partition { struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ /* args */ - /* IPI sending, receiving and handling related fields */ - - u64 local_IPI_amo; /* IPI amo flags yet to be handled */ - spinlock_t IPI_lock; /* IPI handler lock */ - /* channel manager related fields */ atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ @@ -580,11 +627,12 @@ struct xpc_partition { #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ /* - * struct xpc_partition IPI_timer #of seconds to wait before checking for - * dropped IPIs. These occur whenever an IPI amo write doesn't complete until - * after the IPI was received. + * struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the + * following interval #of seconds before checking for dropped notify IRQs. + * These can occur whenever an IRQ's associated amo write doesn't complete + * until after the IRQ was received. */ -#define XPC_P_DROPPED_IPI_WAIT_INTERVAL (0.25 * HZ) +#define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL (0.25 * HZ) /* number of seconds to wait for other partitions to disengage */ #define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90 @@ -617,9 +665,9 @@ extern void (*xpc_offline_heartbeat) (void); extern void (*xpc_online_heartbeat) (void); extern void (*xpc_check_remote_hb) (void); extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); -extern u64 (*xpc_get_IPI_flags) (struct xpc_partition *); +extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *); extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *); -extern void (*xpc_process_msg_IPI) (struct xpc_partition *, int); +extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int); extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *); extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, u64, @@ -638,14 +686,13 @@ extern int (*xpc_any_partition_engaged) (void); extern void (*xpc_indicate_partition_disengaged) (struct xpc_partition *); extern void (*xpc_assume_partition_disengaged) (short); -extern void (*xpc_send_channel_closerequest) (struct xpc_channel *, - unsigned long *); -extern void (*xpc_send_channel_closereply) (struct xpc_channel *, +extern void (*xpc_send_chctl_closerequest) (struct xpc_channel *, unsigned long *); -extern void (*xpc_send_channel_openrequest) (struct xpc_channel *, - unsigned long *); -extern void (*xpc_send_channel_openreply) (struct xpc_channel *, +extern void (*xpc_send_chctl_closereply) (struct xpc_channel *, + unsigned long *); +extern void (*xpc_send_chctl_openrequest) (struct xpc_channel *, unsigned long *); +extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *); extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16, u8, xpc_notify_func, void *); @@ -689,7 +736,7 @@ extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16); extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16, xpc_notify_func, void *); extern void xpc_initiate_received(short, int, void *); -extern void xpc_process_channel_activity(struct xpc_partition *); +extern void xpc_process_sent_chctl_flags(struct xpc_partition *); extern void xpc_connected_callout(struct xpc_channel *); extern void xpc_deliver_msg(struct xpc_channel *); extern void xpc_disconnect_channel(const int, struct xpc_channel *, @@ -799,25 +846,4 @@ xpc_part_ref(struct xpc_partition *part) (_p)->reason_line = _line; \ } -/* - * The sending and receiving of IPIs includes the setting of an >>>AMO variable - * to indicate the reason the IPI was sent. The 64-bit variable is divided - * up into eight bytes, ordered from right to left. Byte zero pertains to - * channel 0, byte one to channel 1, and so on. Each byte is described by - * the following IPI flags. - */ - -#define XPC_IPI_CLOSEREQUEST 0x01 -#define XPC_IPI_CLOSEREPLY 0x02 -#define XPC_IPI_OPENREQUEST 0x04 -#define XPC_IPI_OPENREPLY 0x08 -#define XPC_IPI_MSGREQUEST 0x10 - -/* given an >>>AMO variable and a channel#, get its associated IPI flags */ -#define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff)) -#define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8)) - -#define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL) -#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL) - #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ diff --git a/drivers/misc/sgi-xp/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c index 48b16136305..0d3c153d1d0 100644 --- a/drivers/misc/sgi-xp/xpc_channel.c +++ b/drivers/misc/sgi-xp/xpc_channel.c @@ -201,7 +201,7 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags) if (!(ch->flags & XPC_C_OPENREPLY)) { ch->flags |= XPC_C_OPENREPLY; - xpc_send_channel_openreply(ch, irq_flags); + xpc_send_chctl_openreply(ch, irq_flags); } if (!(ch->flags & XPC_C_ROPENREPLY)) @@ -307,7 +307,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags) if (!(ch->flags & XPC_C_CLOSEREPLY)) { ch->flags |= XPC_C_CLOSEREPLY; - xpc_send_channel_closereply(ch, irq_flags); + xpc_send_chctl_closereply(ch, irq_flags); } if (!(ch->flags & XPC_C_RCLOSEREPLY)) @@ -344,15 +344,15 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags) if (ch->flags & XPC_C_WDISCONNECT) { /* we won't lose the CPU since we're holding ch->lock */ complete(&ch->wdisconnect_wait); - } else if (ch->delayed_IPI_flags) { + } else if (ch->delayed_chctl_flags) { if (part->act_state != XPC_P_DEACTIVATING) { - /* time to take action on any delayed IPI flags */ - spin_lock(&part->IPI_lock); - XPC_SET_IPI_FLAGS(part->local_IPI_amo, ch->number, - ch->delayed_IPI_flags); - spin_unlock(&part->IPI_lock); + /* time to take action on any delayed chctl flags */ + spin_lock(&part->chctl_lock); + part->chctl.flags[ch->number] |= + ch->delayed_chctl_flags; + spin_unlock(&part->chctl_lock); } - ch->delayed_IPI_flags = 0; + ch->delayed_chctl_flags = 0; } } @@ -360,8 +360,8 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags) * Process a change in the channel's remote connection state. */ static void -xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number, - u8 IPI_flags) +xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number, + u8 chctl_flags) { unsigned long irq_flags; struct xpc_openclose_args *args = @@ -376,24 +376,24 @@ again: if ((ch->flags & XPC_C_DISCONNECTED) && (ch->flags & XPC_C_WDISCONNECT)) { /* - * Delay processing IPI flags until thread waiting disconnect + * Delay processing chctl flags until thread waiting disconnect * has had a chance to see that the channel is disconnected. */ - ch->delayed_IPI_flags |= IPI_flags; + ch->delayed_chctl_flags |= chctl_flags; spin_unlock_irqrestore(&ch->lock, irq_flags); return; } - if (IPI_flags & XPC_IPI_CLOSEREQUEST) { + if (chctl_flags & XPC_CHCTL_CLOSEREQUEST) { - dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received " + dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREQUEST (reason=%d) received " "from partid=%d, channel=%d\n", args->reason, ch->partid, ch->number); /* * If RCLOSEREQUEST is set, we're probably waiting for * RCLOSEREPLY. We should find it and a ROPENREQUEST packed - * with this RCLOSEREQUEST in the IPI_flags. + * with this RCLOSEREQUEST in the chctl_flags. */ if (ch->flags & XPC_C_RCLOSEREQUEST) { @@ -402,8 +402,8 @@ again: DBUG_ON(!(ch->flags & XPC_C_CLOSEREPLY)); DBUG_ON(ch->flags & XPC_C_RCLOSEREPLY); - DBUG_ON(!(IPI_flags & XPC_IPI_CLOSEREPLY)); - IPI_flags &= ~XPC_IPI_CLOSEREPLY; + DBUG_ON(!(chctl_flags & XPC_CHCTL_CLOSEREPLY)); + chctl_flags &= ~XPC_CHCTL_CLOSEREPLY; ch->flags |= XPC_C_RCLOSEREPLY; /* both sides have finished disconnecting */ @@ -413,17 +413,15 @@ again: } if (ch->flags & XPC_C_DISCONNECTED) { - if (!(IPI_flags & XPC_IPI_OPENREQUEST)) { - if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, - ch_number) & - XPC_IPI_OPENREQUEST)) { - - DBUG_ON(ch->delayed_IPI_flags != 0); - spin_lock(&part->IPI_lock); - XPC_SET_IPI_FLAGS(part->local_IPI_amo, - ch_number, - XPC_IPI_CLOSEREQUEST); - spin_unlock(&part->IPI_lock); + if (!(chctl_flags & XPC_CHCTL_OPENREQUEST)) { + if (part->chctl.flags[ch_number] & + XPC_CHCTL_OPENREQUEST) { + + DBUG_ON(ch->delayed_chctl_flags != 0); + spin_lock(&part->chctl_lock); + part->chctl.flags[ch_number] |= + XPC_CHCTL_CLOSEREQUEST; + spin_unlock(&part->chctl_lock); } spin_unlock_irqrestore(&ch->lock, irq_flags); return; @@ -436,7 +434,7 @@ again: ch->flags |= (XPC_C_CONNECTING | XPC_C_ROPENREQUEST); } - IPI_flags &= ~(XPC_IPI_OPENREQUEST | XPC_IPI_OPENREPLY); + chctl_flags &= ~(XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY); /* * The meaningful CLOSEREQUEST connection state fields are: @@ -454,7 +452,7 @@ again: XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags); - DBUG_ON(IPI_flags & XPC_IPI_CLOSEREPLY); + DBUG_ON(chctl_flags & XPC_CHCTL_CLOSEREPLY); spin_unlock_irqrestore(&ch->lock, irq_flags); return; } @@ -462,10 +460,10 @@ again: xpc_process_disconnect(ch, &irq_flags); } - if (IPI_flags & XPC_IPI_CLOSEREPLY) { + if (chctl_flags & XPC_CHCTL_CLOSEREPLY) { - dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d," - " channel=%d\n", ch->partid, ch->number); + dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREPLY received from partid=" + "%d, channel=%d\n", ch->partid, ch->number); if (ch->flags & XPC_C_DISCONNECTED) { DBUG_ON(part->act_state != XPC_P_DEACTIVATING); @@ -476,15 +474,14 @@ again: DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST)); if (!(ch->flags & XPC_C_RCLOSEREQUEST)) { - if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, ch_number) - & XPC_IPI_CLOSEREQUEST)) { - - DBUG_ON(ch->delayed_IPI_flags != 0); - spin_lock(&part->IPI_lock); - XPC_SET_IPI_FLAGS(part->local_IPI_amo, - ch_number, - XPC_IPI_CLOSEREPLY); - spin_unlock(&part->IPI_lock); + if (part->chctl.flags[ch_number] & + XPC_CHCTL_CLOSEREQUEST) { + + DBUG_ON(ch->delayed_chctl_flags != 0); + spin_lock(&part->chctl_lock); + part->chctl.flags[ch_number] |= + XPC_CHCTL_CLOSEREPLY; + spin_unlock(&part->chctl_lock); } spin_unlock_irqrestore(&ch->lock, irq_flags); return; @@ -498,9 +495,9 @@ again: } } - if (IPI_flags & XPC_IPI_OPENREQUEST) { + if (chctl_flags & XPC_CHCTL_OPENREQUEST) { - dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, " + dev_dbg(xpc_chan, "XPC_CHCTL_OPENREQUEST (msg_size=%d, " "local_nentries=%d) received from partid=%d, " "channel=%d\n", args->msg_size, args->local_nentries, ch->partid, ch->number); @@ -512,7 +509,7 @@ again: } if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_WDISCONNECT)) { - ch->delayed_IPI_flags |= XPC_IPI_OPENREQUEST; + ch->delayed_chctl_flags |= XPC_CHCTL_OPENREQUEST; spin_unlock_irqrestore(&ch->lock, irq_flags); return; } @@ -554,13 +551,13 @@ again: xpc_process_connect(ch, &irq_flags); } - if (IPI_flags & XPC_IPI_OPENREPLY) { + if (chctl_flags & XPC_CHCTL_OPENREPLY) { - dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, " - "local_nentries=%d, remote_nentries=%d) received from " - "partid=%d, channel=%d\n", args->local_msgqueue_pa, - args->local_nentries, args->remote_nentries, - ch->partid, ch->number); + dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY (local_msgqueue_pa=" + "0x%lx, local_nentries=%d, remote_nentries=%d) " + "received from partid=%d, channel=%d\n", + args->local_msgqueue_pa, args->local_nentries, + args->remote_nentries, ch->partid, ch->number); if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) { spin_unlock_irqrestore(&ch->lock, irq_flags); @@ -591,7 +588,7 @@ again: ch->remote_msgqueue_pa = args->local_msgqueue_pa; if (args->local_nentries < ch->remote_nentries) { - dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new " + dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new " "remote_nentries=%d, old remote_nentries=%d, " "partid=%d, channel=%d\n", args->local_nentries, ch->remote_nentries, @@ -600,7 +597,7 @@ again: ch->remote_nentries = args->local_nentries; } if (args->remote_nentries < ch->local_nentries) { - dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new " + dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new " "local_nentries=%d, old local_nentries=%d, " "partid=%d, channel=%d\n", args->remote_nentries, ch->local_nentries, @@ -690,7 +687,7 @@ xpc_connect_channel(struct xpc_channel *ch) /* initiate the connection */ ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING); - xpc_send_channel_openrequest(ch, &irq_flags); + xpc_send_chctl_openrequest(ch, &irq_flags); xpc_process_connect(ch, &irq_flags); @@ -700,15 +697,15 @@ xpc_connect_channel(struct xpc_channel *ch) } void -xpc_process_channel_activity(struct xpc_partition *part) +xpc_process_sent_chctl_flags(struct xpc_partition *part) { unsigned long irq_flags; - u64 IPI_amo, IPI_flags; + union xpc_channel_ctl_flags chctl; struct xpc_channel *ch; int ch_number; u32 ch_flags; - IPI_amo = xpc_get_IPI_flags(part); + chctl.all_flags = xpc_get_chctl_all_flags(part); /* * Initiate channel connections for registered channels. @@ -721,14 +718,14 @@ xpc_process_channel_activity(struct xpc_partition *part) ch = &part->channels[ch_number]; /* - * Process any open or close related IPI flags, and then deal + * Process any open or close related chctl flags, and then deal * with connecting or disconnecting the channel as required. */ - IPI_flags = XPC_GET_IPI_FLAGS(IPI_amo, ch_number); - - if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags)) - xpc_process_openclose_IPI(part, ch_number, IPI_flags); + if (chctl.flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) { + xpc_process_openclose_chctl_flags(part, ch_number, + chctl.flags[ch_number]); + } ch_flags = ch->flags; /* need an atomic snapshot of flags */ @@ -755,13 +752,13 @@ xpc_process_channel_activity(struct xpc_partition *part) } /* - * Process any message related IPI flags, this may involve the - * activation of kthreads to deliver any pending messages sent - * from the other partition. + * Process any message related chctl flags, this may involve + * the activation of kthreads to deliver any pending messages + * sent from the other partition. */ - if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags)) - xpc_process_msg_IPI(part, ch_number); + if (chctl.flags[ch_number] & XPC_MSG_CHCTL_FLAGS) + xpc_process_msg_chctl_flags(part, ch_number); } } @@ -937,7 +934,7 @@ xpc_disconnect_channel(const int line, struct xpc_channel *ch, XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY | XPC_C_CONNECTING | XPC_C_CONNECTED); - xpc_send_channel_closerequest(ch, irq_flags); + xpc_send_chctl_closerequest(ch, irq_flags); if (channel_was_connected) ch->flags |= XPC_C_WASCONNECTED; diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c index 563aaf4a2ff..43f5b686ecf 100644 --- a/drivers/misc/sgi-xp/xpc_main.c +++ b/drivers/misc/sgi-xp/xpc_main.c @@ -25,18 +25,18 @@ * * Caveats: * - * . We currently have no way to determine which nasid an IPI came - * from. Thus, >>> xpc_IPI_send() does a remote AMO write followed by - * an IPI. The AMO indicates where data is to be pulled from, so - * after the IPI arrives, the remote partition checks the AMO word. - * The IPI can actually arrive before the AMO however, so other code - * must periodically check for this case. Also, remote AMO operations - * do not reliably time out. Thus we do a remote PIO read solely to - * know whether the remote partition is down and whether we should - * stop sending IPIs to it. This remote PIO read operation is set up - * in a special nofault region so SAL knows to ignore (and cleanup) - * any errors due to the remote AMO write, PIO read, and/or PIO - * write operations. + * . Currently on sn2, we have no way to determine which nasid an IRQ + * came from. Thus, xpc_send_IRQ_sn2() does a remote AMO write + * followed by an IPI. The AMO indicates where data is to be pulled + * from, so after the IPI arrives, the remote partition checks the AMO + * word. The IPI can actually arrive before the AMO however, so other + * code must periodically check for this case. Also, remote AMO + * operations do not reliably time out. Thus we do a remote PIO read + * solely to know whether the remote partition is down and whether we + * should stop sending IPIs to it. This remote PIO read operation is + * set up in a special nofault region so SAL knows to ignore (and + * cleanup) any errors due to the remote AMO write, PIO read, and/or + * PIO write operations. * * If/when new hardware solves this IPI problem, we should abandon * the current approach. @@ -185,8 +185,8 @@ void (*xpc_check_remote_hb) (void); enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *part); void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *ch); -u64 (*xpc_get_IPI_flags) (struct xpc_partition *part); -void (*xpc_process_msg_IPI) (struct xpc_partition *part, int ch_number); +u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *part); +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); @@ -206,14 +206,14 @@ int (*xpc_any_partition_engaged) (void); void (*xpc_indicate_partition_disengaged) (struct xpc_partition *part); void (*xpc_assume_partition_disengaged) (short partid); -void (*xpc_send_channel_closerequest) (struct xpc_channel *ch, - unsigned long *irq_flags); -void (*xpc_send_channel_closereply) (struct xpc_channel *ch, +void (*xpc_send_chctl_closerequest) (struct xpc_channel *ch, unsigned long *irq_flags); -void (*xpc_send_channel_openrequest) (struct xpc_channel *ch, - unsigned long *irq_flags); -void (*xpc_send_channel_openreply) (struct xpc_channel *ch, +void (*xpc_send_chctl_closereply) (struct xpc_channel *ch, + unsigned long *irq_flags); +void (*xpc_send_chctl_openrequest) (struct xpc_channel *ch, unsigned long *irq_flags); +void (*xpc_send_chctl_openreply) (struct xpc_channel *ch, + unsigned long *irq_flags); enum xp_retval (*xpc_send_msg) (struct xpc_channel *ch, u32 flags, void *payload, u16 payload_size, u8 notify_type, @@ -302,7 +302,7 @@ xpc_hb_checker(void *ignore) /* * We need to periodically recheck to ensure no - * IPI/AMO pairs have been missed. That check + * IRQ/AMO pairs have been missed. That check * must always reset xpc_hb_check_timeout. */ force_IRQ = 1; @@ -378,7 +378,7 @@ xpc_channel_mgr(struct xpc_partition *part) atomic_read(&part->nchannels_active) > 0 || !xpc_partition_disengaged(part)) { - xpc_process_channel_activity(part); + xpc_process_sent_chctl_flags(part); /* * Wait until we've been requested to activate kthreads or @@ -396,7 +396,7 @@ xpc_channel_mgr(struct xpc_partition *part) atomic_dec(&part->channel_mgr_requests); (void)wait_event_interruptible(part->channel_mgr_wq, (atomic_read(&part->channel_mgr_requests) > 0 || - part->local_IPI_amo != 0 || + part->chctl.all_flags != 0 || (part->act_state == XPC_P_DEACTIVATING && atomic_read(&part->nchannels_active) == 0 && xpc_partition_disengaged(part)))); @@ -753,16 +753,15 @@ xpc_disconnect_wait(int ch_number) DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED)); wakeup_channel_mgr = 0; - if (ch->delayed_IPI_flags) { + if (ch->delayed_chctl_flags) { if (part->act_state != XPC_P_DEACTIVATING) { - spin_lock(&part->IPI_lock); - XPC_SET_IPI_FLAGS(part->local_IPI_amo, - ch->number, - ch->delayed_IPI_flags); - spin_unlock(&part->IPI_lock); + spin_lock(&part->chctl_lock); + part->chctl.flags[ch->number] |= + ch->delayed_chctl_flags; + spin_unlock(&part->chctl_lock); wakeup_channel_mgr = 1; } - ch->delayed_IPI_flags = 0; + ch->delayed_chctl_flags = 0; } ch->flags &= ~XPC_C_WDISCONNECT; diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c index 69d74bd5689..0fef7d86a5a 100644 --- a/drivers/misc/sgi-xp/xpc_sn2.c +++ b/drivers/misc/sgi-xp/xpc_sn2.c @@ -104,20 +104,20 @@ xpc_disallow_IPI_ops_sn2(void) } /* - * 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, - * one that is associated with partition activity (SGI_XPC_ACTIVATE) and - * the other that is associated with channel activity (SGI_XPC_NOTIFY). + * The following set of functions are used for the sending and receiving of + * IRQs (also known as IPIs). There are two flavors of IRQs, one that is + * associated with partition activity (SGI_XPC_ACTIVATE) and the other that + * is associated with channel activity (SGI_XPC_NOTIFY). */ static u64 -xpc_IPI_receive_sn2(AMO_t *amo) +xpc_receive_IRQ_amo_sn2(AMO_t *amo) { return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR); } static enum xp_retval -xpc_IPI_send_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) +xpc_send_IRQ_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) { int ret = 0; unsigned long irq_flags; @@ -131,7 +131,7 @@ xpc_IPI_send_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) * We must always use the nofault function regardless of whether we * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we * didn't, we'd never know that the other partition is down and would - * keep sending IPIs and AMOs to it until the heartbeat times out. + * keep sending IRQs and AMOs to it until the heartbeat times out. */ ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable), xp_nofault_PIOR_target)); @@ -142,16 +142,16 @@ xpc_IPI_send_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) } static AMO_t * -xpc_IPI_init_sn2(int index) +xpc_init_IRQ_amo_sn2(int index) { AMO_t *amo = xpc_vars->amos_page + index; - (void)xpc_IPI_receive_sn2(amo); /* clear AMO variable */ + (void)xpc_receive_IRQ_amo_sn2(amo); /* clear AMO variable */ return amo; } /* - * IPIs associated with SGI_XPC_ACTIVATE IRQ. + * Functions associated with SGI_XPC_ACTIVATE IRQ. */ /* @@ -166,23 +166,23 @@ xpc_handle_activate_IRQ_sn2(int irq, void *dev_id) } /* - * Flag the appropriate AMO variable and send an IPI to the specified node. + * Flag the appropriate AMO variable and send an IRQ to the specified node. */ static void -xpc_activate_IRQ_send_sn2(u64 amos_page_pa, int from_nasid, int to_nasid, - int to_phys_cpuid) +xpc_send_activate_IRQ_sn2(u64 amos_page_pa, int from_nasid, int to_nasid, + int to_phys_cpuid) { int w_index = XPC_NASID_W_INDEX(from_nasid); int b_index = XPC_NASID_B_INDEX(from_nasid); AMO_t *amos = (AMO_t *)__va(amos_page_pa + (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t))); - (void)xpc_IPI_send_sn2(&amos[w_index], (1UL << b_index), to_nasid, + (void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid, to_phys_cpuid, SGI_XPC_ACTIVATE); } static void -xpc_activate_IRQ_send_local_sn2(int from_nasid) +xpc_send_local_activate_IRQ_sn2(int from_nasid) { int w_index = XPC_NASID_W_INDEX(from_nasid); int b_index = XPC_NASID_B_INDEX(from_nasid); @@ -197,29 +197,29 @@ xpc_activate_IRQ_send_local_sn2(int from_nasid) } /* - * IPIs associated with SGI_XPC_NOTIFY IRQ. + * Functions associated with SGI_XPC_NOTIFY IRQ. */ /* - * Check to see if there is any channel activity to/from the specified - * partition. + * Check to see if any chctl flags were sent from the specified partition. */ static void -xpc_check_for_channel_activity_sn2(struct xpc_partition *part) +xpc_check_for_sent_chctl_flags_sn2(struct xpc_partition *part) { - u64 IPI_amo; + union xpc_channel_ctl_flags chctl; unsigned long irq_flags; - IPI_amo = xpc_IPI_receive_sn2(part->sn.sn2.local_IPI_amo_va); - if (IPI_amo == 0) + chctl.all_flags = xpc_receive_IRQ_amo_sn2(part->sn.sn2. + local_chctl_amo_va); + if (chctl.all_flags == 0) return; - spin_lock_irqsave(&part->IPI_lock, irq_flags); - part->local_IPI_amo |= IPI_amo; - spin_unlock_irqrestore(&part->IPI_lock, irq_flags); + spin_lock_irqsave(&part->chctl_lock, irq_flags); + part->chctl.all_flags |= chctl.all_flags; + spin_unlock_irqrestore(&part->chctl_lock, irq_flags); - dev_dbg(xpc_chan, "received IPI from partid=%d, IPI_amo=0x%lx\n", - XPC_PARTID(part), IPI_amo); + dev_dbg(xpc_chan, "received notify IRQ from partid=%d, chctl.all_flags=" + "0x%lx\n", XPC_PARTID(part), chctl.all_flags); xpc_wakeup_channel_mgr(part); } @@ -228,17 +228,17 @@ xpc_check_for_channel_activity_sn2(struct xpc_partition *part) * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more * than one partition, we use an AMO_t structure per partition to indicate - * whether a partition has sent an IPI or not. If it has, then wake up the + * whether a partition has sent an IRQ or not. If it has, then wake up the * associated kthread to handle it. * - * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC + * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IRQs sent by XPC * running on other partitions. * * Noteworthy Arguments: * * irq - Interrupt ReQuest number. NOT USED. * - * dev_id - partid of IPI's potential sender. + * dev_id - partid of IRQ's potential sender. */ static irqreturn_t xpc_handle_notify_IRQ_sn2(int irq, void *dev_id) @@ -249,7 +249,7 @@ xpc_handle_notify_IRQ_sn2(int irq, void *dev_id) DBUG_ON(partid < 0 || partid >= xp_max_npartitions); if (xpc_part_ref(part)) { - xpc_check_for_channel_activity_sn2(part); + xpc_check_for_sent_chctl_flags_sn2(part); xpc_part_deref(part); } @@ -257,45 +257,47 @@ xpc_handle_notify_IRQ_sn2(int irq, void *dev_id) } /* - * Check to see if xpc_handle_notify_IRQ_sn2() dropped any IPIs on the floor - * because the write to their associated IPI amo completed after the IRQ/IPI + * Check to see if xpc_handle_notify_IRQ_sn2() dropped any IRQs on the floor + * because the write to their associated amo variable completed after the IRQ * was received. */ static void -xpc_dropped_notify_IRQ_check_sn2(struct xpc_partition *part) +xpc_check_for_dropped_notify_IRQ_sn2(struct xpc_partition *part) { struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2; if (xpc_part_ref(part)) { - xpc_check_for_channel_activity_sn2(part); + xpc_check_for_sent_chctl_flags_sn2(part); part_sn2->dropped_notify_IRQ_timer.expires = jiffies + - XPC_P_DROPPED_IPI_WAIT_INTERVAL; + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL; add_timer(&part_sn2->dropped_notify_IRQ_timer); xpc_part_deref(part); } } /* - * Send an IPI to the remote partition that is associated with the + * Send a notify IRQ to the remote partition that is associated with the * specified channel. */ static void -xpc_notify_IRQ_send_sn2(struct xpc_channel *ch, u8 ipi_flag, - char *ipi_flag_string, unsigned long *irq_flags) +xpc_send_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag, + char *chctl_flag_string, unsigned long *irq_flags) { struct xpc_partition *part = &xpc_partitions[ch->partid]; struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2; + union xpc_channel_ctl_flags chctl = { 0 }; enum xp_retval ret; if (likely(part->act_state != XPC_P_DEACTIVATING)) { - ret = xpc_IPI_send_sn2(part_sn2->remote_IPI_amo_va, - (u64)ipi_flag << (ch->number * 8), - part_sn2->remote_IPI_nasid, - part_sn2->remote_IPI_phys_cpuid, + chctl.flags[ch->number] = chctl_flag; + ret = xpc_send_IRQ_sn2(part_sn2->remote_chctl_amo_va, + chctl.all_flags, + part_sn2->notify_IRQ_nasid, + part_sn2->notify_IRQ_phys_cpuid, SGI_XPC_NOTIFY); dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n", - ipi_flag_string, ch->partid, ch->number, ret); + chctl_flag_string, ch->partid, ch->number, ret); if (unlikely(ret != xpSuccess)) { if (irq_flags != NULL) spin_unlock_irqrestore(&ch->lock, *irq_flags); @@ -306,78 +308,78 @@ xpc_notify_IRQ_send_sn2(struct xpc_channel *ch, u8 ipi_flag, } } -#define XPC_NOTIFY_IRQ_SEND_SN2(_ch, _ipi_f, _irq_f) \ - xpc_notify_IRQ_send_sn2(_ch, _ipi_f, #_ipi_f, _irq_f) +#define XPC_SEND_NOTIFY_IRQ_SN2(_ch, _ipi_f, _irq_f) \ + xpc_send_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f, _irq_f) /* * Make it look like the remote partition, which is associated with the - * specified channel, sent us an IPI. This faked IPI will be handled - * by xpc_dropped_notify_IRQ_check_sn2(). + * specified channel, sent us a notify IRQ. This faked IRQ will be handled + * by xpc_check_for_dropped_notify_IRQ_sn2(). */ static void -xpc_notify_IRQ_send_local_sn2(struct xpc_channel *ch, u8 ipi_flag, - char *ipi_flag_string) +xpc_send_local_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag, + char *chctl_flag_string) { struct xpc_partition *part = &xpc_partitions[ch->partid]; + union xpc_channel_ctl_flags chctl = { 0 }; - FETCHOP_STORE_OP(TO_AMO((u64)&part->sn.sn2.local_IPI_amo_va->variable), - FETCHOP_OR, ((u64)ipi_flag << (ch->number * 8))); + chctl.flags[ch->number] = chctl_flag; + FETCHOP_STORE_OP(TO_AMO((u64)&part->sn.sn2.local_chctl_amo_va-> + variable), FETCHOP_OR, chctl.all_flags); dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n", - ipi_flag_string, ch->partid, ch->number); + chctl_flag_string, ch->partid, ch->number); } -#define XPC_NOTIFY_IRQ_SEND_LOCAL_SN2(_ch, _ipi_f) \ - xpc_notify_IRQ_send_local_sn2(_ch, _ipi_f, #_ipi_f) +#define XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(_ch, _ipi_f) \ + xpc_send_local_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f) static void -xpc_send_channel_closerequest_sn2(struct xpc_channel *ch, - unsigned long *irq_flags) +xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch, + unsigned long *irq_flags) { struct xpc_openclose_args *args = ch->local_openclose_args; args->reason = ch->reason; - XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_CLOSEREQUEST, irq_flags); + XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags); } static void -xpc_send_channel_closereply_sn2(struct xpc_channel *ch, - unsigned long *irq_flags) +xpc_send_chctl_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags) { - XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_CLOSEREPLY, irq_flags); + XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREPLY, irq_flags); } static void -xpc_send_channel_openrequest_sn2(struct xpc_channel *ch, - unsigned long *irq_flags) +xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_openclose_args *args = ch->local_openclose_args; args->msg_size = ch->msg_size; args->local_nentries = ch->local_nentries; - XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_OPENREQUEST, irq_flags); + XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREQUEST, irq_flags); } static void -xpc_send_channel_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags) +xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags) { struct xpc_openclose_args *args = ch->local_openclose_args; args->remote_nentries = ch->remote_nentries; args->local_nentries = ch->local_nentries; args->local_msgqueue_pa = __pa(ch->local_msgqueue); - XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_OPENREPLY, irq_flags); + XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags); } static void -xpc_send_channel_msgrequest_sn2(struct xpc_channel *ch) +xpc_send_chctl_msgrequest_sn2(struct xpc_channel *ch) { - XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_MSGREQUEST, NULL); + XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST, NULL); } static void -xpc_send_channel_local_msgrequest_sn2(struct xpc_channel *ch) +xpc_send_chctl_local_msgrequest_sn2(struct xpc_channel *ch) { - XPC_NOTIFY_IRQ_SEND_LOCAL_SN2(ch, XPC_IPI_MSGREQUEST); + XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST); } /* @@ -402,7 +404,7 @@ xpc_indicate_partition_engaged_sn2(struct xpc_partition *part) * We must always use the nofault function regardless of whether we * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we * didn't, we'd never know that the other partition is down and would - * keep sending IPIs and AMOs to it until the heartbeat times out. + * keep sending IRQs and AMOs to it until the heartbeat times out. */ (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> variable), @@ -429,7 +431,7 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part) * We must always use the nofault function regardless of whether we * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we * didn't, we'd never know that the other partition is down and would - * keep sending IPIs and AMOs to it until the heartbeat times out. + * keep sending IRQs and AMOs to it until the heartbeat times out. */ (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> variable), @@ -441,7 +443,7 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part) * Send activate IRQ to get other side to see that we've cleared our * bit in their engaged partitions AMO. */ - xpc_activate_IRQ_send_sn2(part_sn2->remote_amos_page_pa, + xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa, cnodeid_to_nasid(0), part_sn2->activate_IRQ_nasid, part_sn2->activate_IRQ_phys_cpuid); @@ -595,11 +597,11 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp) /* initialize the activate IRQ related AMO variables */ for (i = 0; i < xp_nasid_mask_words; i++) - (void)xpc_IPI_init_sn2(XPC_ACTIVATE_IRQ_AMOS + i); + (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS + i); /* initialize the engaged remote partitions related AMO variables */ - (void)xpc_IPI_init_sn2(XPC_ENGAGED_PARTITIONS_AMO); - (void)xpc_IPI_init_sn2(XPC_DEACTIVATE_REQUEST_AMO); + (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO); + (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO); return xpSuccess; } @@ -729,13 +731,13 @@ static void xpc_request_partition_activation_sn2(struct xpc_rsvd_page *remote_rp, u64 remote_rp_pa, int nasid) { - xpc_activate_IRQ_send_local_sn2(nasid); + xpc_send_local_activate_IRQ_sn2(nasid); } static void xpc_request_partition_reactivation_sn2(struct xpc_partition *part) { - xpc_activate_IRQ_send_local_sn2(part->sn.sn2.activate_IRQ_nasid); + xpc_send_local_activate_IRQ_sn2(part->sn.sn2.activate_IRQ_nasid); } static void @@ -755,7 +757,7 @@ xpc_request_partition_deactivation_sn2(struct xpc_partition *part) * We must always use the nofault function regardless of whether we * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we * didn't, we'd never know that the other partition is down and would - * keep sending IPIs and AMOs to it until the heartbeat times out. + * keep sending IRQs and AMOs to it until the heartbeat times out. */ (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> variable), @@ -767,7 +769,7 @@ xpc_request_partition_deactivation_sn2(struct xpc_partition *part) * Send activate IRQ to get other side to see that we've set our * bit in their deactivate request AMO. */ - xpc_activate_IRQ_send_sn2(part_sn2->remote_amos_page_pa, + xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa, cnodeid_to_nasid(0), part_sn2->activate_IRQ_nasid, part_sn2->activate_IRQ_phys_cpuid); @@ -789,7 +791,7 @@ xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part) * We must always use the nofault function regardless of whether we * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we * didn't, we'd never know that the other partition is down and would - * keep sending IPIs and AMOs to it until the heartbeat times out. + * keep sending IRQs and AMOs to it until the heartbeat times out. */ (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> variable), @@ -861,11 +863,11 @@ xpc_update_partition_info_sn2(struct xpc_partition *part, u8 remote_rp_version, } /* - * Prior code has determined the nasid which generated an IPI. Inspect - * that nasid to determine if its partition needs to be activated or - * deactivated. + * Prior code has determined the nasid which generated a activate IRQ. + * Inspect that nasid to determine if its partition needs to be activated + * or deactivated. * - * A partition is consider "awaiting activation" if our partition + * A partition is considered "awaiting activation" if our partition * flags indicate it is not active and it has a heartbeat. A * partition is considered "awaiting deactivation" if our partition * flags indicate it is active but it has no heartbeat or it is not @@ -997,7 +999,7 @@ xpc_identify_activate_IRQ_sender_sn2(void) if (xpc_exiting) break; - nasid_mask = xpc_IPI_receive_sn2(&act_amos[word]); + nasid_mask = xpc_receive_IRQ_amo_sn2(&act_amos[word]); if (nasid_mask == 0) { /* no IRQs from nasids in this variable */ continue; @@ -1117,20 +1119,20 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) part_sn2->remote_openclose_args_pa = 0; - part_sn2->local_IPI_amo_va = xpc_IPI_init_sn2(partid); - part->local_IPI_amo = 0; - spin_lock_init(&part->IPI_lock); + 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->remote_IPI_nasid = 0; - part_sn2->remote_IPI_phys_cpuid = 0; - part_sn2->remote_IPI_amo_va = NULL; + 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->IPI_owner, "xpc%02d", partid); + sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid); ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2, - IRQF_SHARED, part_sn2->IPI_owner, + IRQF_SHARED, part_sn2->notify_IRQ_owner, (void *)(u64)partid); if (ret != 0) { dev_err(xpc_chan, "can't register NOTIFY IRQ handler, " @@ -1139,13 +1141,13 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) goto out_5; } - /* Setup a timer to check for dropped IPIs */ + /* Setup a timer to check for dropped notify IRQs */ timer = &part_sn2->dropped_notify_IRQ_timer; init_timer(timer); timer->function = - (void (*)(unsigned long))xpc_dropped_notify_IRQ_check_sn2; + (void (*)(unsigned long))xpc_check_for_dropped_notify_IRQ_sn2; timer->data = (unsigned long)part; - timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT_INTERVAL; + timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL; add_timer(timer); part->nchannels = XPC_MAX_NCHANNELS; @@ -1196,10 +1198,10 @@ xpc_setup_infrastructure_sn2(struct xpc_partition *part) xpc_vars_part[partid].GPs_pa = __pa(part_sn2->local_GPs); xpc_vars_part[partid].openclose_args_pa = __pa(part->local_openclose_args); - xpc_vars_part[partid].IPI_amo_pa = __pa(part_sn2->local_IPI_amo_va); + xpc_vars_part[partid].chctl_amo_pa = __pa(part_sn2->local_chctl_amo_va); cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */ - xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid); - xpc_vars_part[partid].IPI_phys_cpuid = cpu_physical_id(cpuid); + xpc_vars_part[partid].notify_IRQ_nasid = cpuid_to_nasid(cpuid); + xpc_vars_part[partid].notify_IRQ_phys_cpuid = cpu_physical_id(cpuid); xpc_vars_part[partid].nchannels = part->nchannels; xpc_vars_part[partid].magic = XPC_VP_MAGIC1; @@ -1239,7 +1241,7 @@ xpc_teardown_infrastructure_sn2(struct xpc_partition *part) * 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 IPIs sent to + * are no longer valid) and by ignoring all XPC notify IRQs sent to * this partition. */ @@ -1275,7 +1277,7 @@ xpc_teardown_infrastructure_sn2(struct xpc_partition *part) part_sn2->local_GPs = NULL; kfree(part->channels); part->channels = NULL; - part_sn2->local_IPI_amo_va = NULL; + part_sn2->local_chctl_amo_va = NULL; } /* @@ -1370,7 +1372,7 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part) if (pulled_entry->GPs_pa == 0 || pulled_entry->openclose_args_pa == 0 || - pulled_entry->IPI_amo_pa == 0) { + pulled_entry->chctl_amo_pa == 0) { dev_err(xpc_chan, "partition %d's XPC vars_part for " "partition %d are not valid\n", partid, @@ -1383,10 +1385,11 @@ xpc_pull_remote_vars_part_sn2(struct xpc_partition *part) part_sn2->remote_GPs_pa = pulled_entry->GPs_pa; part_sn2->remote_openclose_args_pa = pulled_entry->openclose_args_pa; - part_sn2->remote_IPI_amo_va = - (AMO_t *)__va(pulled_entry->IPI_amo_pa); - part_sn2->remote_IPI_nasid = pulled_entry->IPI_nasid; - part_sn2->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid; + part_sn2->remote_chctl_amo_va = + (AMO_t *)__va(pulled_entry->chctl_amo_pa); + part_sn2->notify_IRQ_nasid = pulled_entry->notify_IRQ_nasid; + part_sn2->notify_IRQ_phys_cpuid = + pulled_entry->notify_IRQ_phys_cpuid; if (part->nchannels > pulled_entry->nchannels) part->nchannels = pulled_entry->nchannels; @@ -1437,7 +1440,7 @@ xpc_make_first_contact_sn2(struct xpc_partition *part) * Send activate IRQ to get other side to activate if they've not * already begun to do so. */ - xpc_activate_IRQ_send_sn2(part_sn2->remote_amos_page_pa, + xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa, cnodeid_to_nasid(0), part_sn2->activate_IRQ_nasid, part_sn2->activate_IRQ_phys_cpuid); @@ -1462,28 +1465,28 @@ xpc_make_first_contact_sn2(struct xpc_partition *part) } /* - * Get the IPI flags and pull the openclose args and/or remote GPs as needed. + * Get the chctl flags and pull the openclose args and/or remote GPs as needed. */ static u64 -xpc_get_IPI_flags_sn2(struct xpc_partition *part) +xpc_get_chctl_all_flags_sn2(struct xpc_partition *part) { struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2; unsigned long irq_flags; - u64 IPI_amo; + union xpc_channel_ctl_flags chctl; enum xp_retval ret; /* - * See if there are any IPI flags to be handled. + * See if there are any chctl flags to be handled. */ - spin_lock_irqsave(&part->IPI_lock, irq_flags); - IPI_amo = part->local_IPI_amo; - if (IPI_amo != 0) - part->local_IPI_amo = 0; + 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->IPI_lock, irq_flags); + spin_unlock_irqrestore(&part->chctl_lock, irq_flags); - if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) { + if (xpc_any_openclose_chctl_flags_set(&chctl)) { ret = xpc_pull_remote_cachelines_sn2(part, part-> remote_openclose_args, (void *)part_sn2-> @@ -1496,12 +1499,12 @@ xpc_get_IPI_flags_sn2(struct xpc_partition *part) "partition %d, ret=%d\n", XPC_PARTID(part), ret); - /* don't bother processing IPIs anymore */ - IPI_amo = 0; + /* don't bother processing chctl flags anymore */ + chctl.all_flags = 0; } } - if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) { + if (xpc_any_msg_chctl_flags_set(&chctl)) { ret = xpc_pull_remote_cachelines_sn2(part, part_sn2->remote_GPs, (void *)part_sn2->remote_GPs_pa, XPC_GP_SIZE); @@ -1511,12 +1514,12 @@ xpc_get_IPI_flags_sn2(struct xpc_partition *part) dev_dbg(xpc_chan, "failed to pull GPs from partition " "%d, ret=%d\n", XPC_PARTID(part), ret); - /* don't bother processing IPIs anymore */ - IPI_amo = 0; + /* don't bother processing chctl flags anymore */ + chctl.all_flags = 0; } } - return IPI_amo; + return chctl.all_flags; } /* @@ -1610,7 +1613,7 @@ xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch) } static void -xpc_process_msg_IPI_sn2(struct xpc_partition *part, int ch_number) +xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number) { struct xpc_channel *ch = &part->channels[ch_number]; struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2; @@ -1827,8 +1830,8 @@ xpc_get_deliverable_msg_sn2(struct xpc_channel *ch) /* * Now we actually send the messages that are ready to be sent by advancing - * the local message queue's Put value and then send an IPI to the recipient - * partition. + * the local message queue's Put value and then send a chctl msgrequest to the + * recipient partition. */ static void xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put) @@ -1836,7 +1839,7 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put) struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2; struct xpc_msg *msg; s64 put = initial_put + 1; - int send_IPI = 0; + int send_msgrequest = 0; while (1) { @@ -1871,7 +1874,7 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put) dev_dbg(xpc_chan, "local_GP->put changed to %ld, partid=%d, " "channel=%d\n", put, ch->partid, ch->number); - send_IPI = 1; + send_msgrequest = 1; /* * We need to ensure that the message referenced by @@ -1881,8 +1884,8 @@ xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put) initial_put = put; } - if (send_IPI) - xpc_send_channel_msgrequest_sn2(ch); + if (send_msgrequest) + xpc_send_chctl_msgrequest_sn2(ch); } /* @@ -1929,13 +1932,13 @@ xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags, * There aren't any available msg entries at this time. * * In waiting for a message entry to become available, - * we set a timeout in case the other side is not - * sending completion IPIs. This lets us fake an IPI - * that will cause the IPI handler to fetch the latest - * GP values as if an IPI was sent by the other side. + * we set a timeout in case the other side is not sending + * completion interrupts. This lets us fake a notify IRQ + * that will cause the notify IRQ handler to fetch the latest + * GP values as if an interrupt was sent by the other side. */ if (ret == xpTimeout) - xpc_send_channel_local_msgrequest_sn2(ch); + xpc_send_chctl_local_msgrequest_sn2(ch); if (flags & XPC_NOWAIT) return xpNoWait; @@ -1962,8 +1965,8 @@ xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags, /* * Common code that does the actual sending of the message by advancing the - * local message queue's Put value and sends an IPI to the partition the - * message is being sent to. + * local message queue's Put value and sends a chctl msgrequest to the + * partition the message is being sent to. */ static enum xp_retval xpc_send_msg_sn2(struct xpc_channel *ch, u32 flags, void *payload, @@ -2055,7 +2058,7 @@ out_1: /* * Now we actually acknowledge the messages that have been delivered and ack'd * by advancing the cached remote message queue's Get value and if requested - * send an IPI to the message sender's partition. + * send a chctl msgrequest to the message sender's partition. */ static void xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags) @@ -2063,7 +2066,7 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags) struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2; struct xpc_msg *msg; s64 get = initial_get + 1; - int send_IPI = 0; + int send_msgrequest = 0; while (1) { @@ -2099,7 +2102,7 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags) dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, " "channel=%d\n", get, ch->partid, ch->number); - send_IPI = (msg_flags & XPC_M_INTERRUPT); + send_msgrequest = (msg_flags & XPC_M_INTERRUPT); /* * We need to ensure that the message referenced by @@ -2109,8 +2112,8 @@ xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags) initial_get = get; } - if (send_IPI) - xpc_send_channel_msgrequest_sn2(ch); + if (send_msgrequest) + xpc_send_chctl_msgrequest_sn2(ch); } static void @@ -2168,9 +2171,9 @@ xpc_init_sn2(void) xpc_setup_infrastructure = xpc_setup_infrastructure_sn2; xpc_teardown_infrastructure = xpc_teardown_infrastructure_sn2; xpc_make_first_contact = xpc_make_first_contact_sn2; - xpc_get_IPI_flags = xpc_get_IPI_flags_sn2; + xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2; xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2; - xpc_process_msg_IPI = xpc_process_msg_IPI_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; @@ -2181,10 +2184,10 @@ xpc_init_sn2(void) xpc_indicate_partition_disengaged_sn2; xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2; - xpc_send_channel_closerequest = xpc_send_channel_closerequest_sn2; - xpc_send_channel_closereply = xpc_send_channel_closereply_sn2; - xpc_send_channel_openrequest = xpc_send_channel_openrequest_sn2; - xpc_send_channel_openreply = xpc_send_channel_openreply_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; diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c index c53b229cb04..1401b0f45dc 100644 --- a/drivers/misc/sgi-xp/xpc_uv.c +++ b/drivers/misc/sgi-xp/xpc_uv.c @@ -26,7 +26,7 @@ static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); static void *xpc_activate_mq; static void -xpc_IPI_send_local_activate_uv(struct xpc_partition *part) +xpc_send_local_activate_IRQ_uv(struct xpc_partition *part) { /* * >>> make our side think that the remote parition sent an activate @@ -75,13 +75,13 @@ xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, * >>> part->sn.uv.activate_mq_gpa = remote_rp->sn.activate_mq_gpa; */ - xpc_IPI_send_local_activate_uv(part); + xpc_send_local_activate_IRQ_uv(part); } static void xpc_request_partition_reactivation_uv(struct xpc_partition *part) { - xpc_IPI_send_local_activate_uv(part); + xpc_send_local_activate_IRQ_uv(part); } /* @@ -114,7 +114,7 @@ xpc_make_first_contact_uv(struct xpc_partition *part) } static u64 -xpc_get_IPI_flags_uv(struct xpc_partition *part) +xpc_get_chctl_all_flags_uv(struct xpc_partition *part) { /* >>> this function needs fleshing out */ return 0UL; @@ -140,7 +140,7 @@ xpc_init_uv(void) xpc_setup_infrastructure = xpc_setup_infrastructure_uv; xpc_teardown_infrastructure = xpc_teardown_infrastructure_uv; xpc_make_first_contact = xpc_make_first_contact_uv; - xpc_get_IPI_flags = xpc_get_IPI_flags_uv; + xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv; xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv; } |