diff options
author | Dean Nelson <dcn@sgi.com> | 2008-07-29 22:34:10 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-30 09:41:49 -0700 |
commit | 7fb5e59d63deda89a8eefdbd5b3c8d622076afd4 (patch) | |
tree | 4c78f9e016dd0998e8539a1da358b4ba961db8e9 /drivers/misc/sgi-xp/xpc.h | |
parent | a47d5dac9d8481766382f8cf1483dd581df38b99 (diff) | |
download | op-kernel-dev-7fb5e59d63deda89a8eefdbd5b3c8d622076afd4.zip op-kernel-dev-7fb5e59d63deda89a8eefdbd5b3c8d622076afd4.tar.gz |
sgi-xp: separate chctl_flags from XPC's notify IRQ
Tie current IPI references to either XPC's notify IRQ or channel control
flags.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp/xpc.h')
-rw-r--r-- | drivers/misc/sgi-xp/xpc.h | 124 |
1 files changed, 75 insertions, 49 deletions
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h index b04cfbe..26a1725 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 */ |