diff options
Diffstat (limited to 'drivers/misc/sgi-xp/xpc.h')
| -rw-r--r-- | drivers/misc/sgi-xp/xpc.h | 442 |
1 files changed, 185 insertions, 257 deletions
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h index 14e70ee..64368bb 100644 --- a/drivers/misc/sgi-xp/xpc.h +++ b/drivers/misc/sgi-xp/xpc.h @@ -6,7 +6,6 @@ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. */ - /* * Cross Partition Communication (XPC) structures and macros. */ @@ -14,7 +13,6 @@ #ifndef _DRIVERS_MISC_SGIXP_XPC_H #define _DRIVERS_MISC_SGIXP_XPC_H - #include <linux/interrupt.h> #include <linux/sysctl.h> #include <linux/device.h> @@ -29,7 +27,6 @@ #include <asm/sn/shub_mmr.h> #include "xp.h" - /* * XPC Version numbers consist of a major and minor number. XPC can always * talk to versions with same major #, and never talk to versions with a @@ -39,7 +36,6 @@ #define XPC_VERSION_MAJOR(_v) ((_v) >> 4) #define XPC_VERSION_MINOR(_v) ((_v) & 0xf) - /* * The next macros define word or bit representations for given * C-brick nasid in either the SAL provided bit array representing @@ -67,7 +63,6 @@ /* define the process name of the discovery thread */ #define XPC_DISCOVERY_THREAD_NAME "xpc_discovery" - /* * the reserved page * @@ -121,7 +116,7 @@ struct xpc_rsvd_page { u64 nasids_size; /* SAL: size of each nasid mask in bytes */ }; -#define XPC_RP_VERSION _XPC_VERSION(1,1) /* version 1.1 of the reserved page */ +#define XPC_RP_VERSION _XPC_VERSION(1,1) /* version 1.1 of the reserved page */ #define XPC_SUPPORTS_RP_STAMP(_version) \ (_version >= _XPC_VERSION(1,1)) @@ -138,14 +133,12 @@ xpc_compare_stamps(struct timespec *stamp1, struct timespec *stamp2) { int ret; - if ((ret = stamp1->tv_sec - stamp2->tv_sec) == 0) { ret = stamp1->tv_nsec - stamp2->tv_nsec; } return ret; } - /* * Define the structures by which XPC variables can be exported to other * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) @@ -172,12 +165,11 @@ struct xpc_vars { AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */ }; -#define XPC_V_VERSION _XPC_VERSION(3,1) /* version 3.1 of the cross vars */ +#define XPC_V_VERSION _XPC_VERSION(3,1) /* version 3.1 of the cross vars */ #define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \ (_version >= _XPC_VERSION(3,1)) - static inline int xpc_hb_allowed(partid_t partid, struct xpc_vars *vars) { @@ -193,7 +185,7 @@ xpc_allow_hb(partid_t partid, struct xpc_vars *vars) old_mask = vars->heartbeating_to_mask; new_mask = (old_mask | (1UL << partid)); } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) != - old_mask); + old_mask); } static inline void @@ -205,10 +197,9 @@ xpc_disallow_hb(partid_t partid, struct xpc_vars *vars) old_mask = vars->heartbeating_to_mask; new_mask = (old_mask & ~(1UL << partid)); } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) != - old_mask); + old_mask); } - /* * The AMOs page consists of a number of AMO variables which are divided into * four groups, The first two groups are used to identify an IRQ's sender. @@ -222,7 +213,6 @@ xpc_disallow_hb(partid_t partid, struct xpc_vars *vars) #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS) #define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1) - /* * The following structure describes the per partition specific variables. * @@ -257,9 +247,8 @@ struct xpc_vars_part { * 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 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ +#define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ /* the reserved page sizes and offsets */ @@ -271,7 +260,6 @@ struct xpc_vars_part { #define XPC_RP_VARS(_rp) ((struct xpc_vars *) XPC_RP_MACH_NASIDS(_rp) + xp_nasid_mask_words) #define XPC_RP_VARS_PART(_rp) (struct xpc_vars_part *) ((u8 *) XPC_RP_VARS(rp) + XPC_RP_VARS_SIZE) - /* * 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 @@ -285,8 +273,6 @@ struct xpc_vars_part { #define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff) #define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff) - - /* * Define a Get/Put value pair (pointers) used with a message queue. */ @@ -298,8 +284,6 @@ struct xpc_gp { #define XPC_GP_SIZE \ L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_NCHANNELS) - - /* * Define a structure that contains arguments associated with opening and * closing a channel. @@ -315,20 +299,15 @@ struct xpc_openclose_args { #define XPC_OPENCLOSE_ARGS_SIZE \ L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * XPC_NCHANNELS) - - /* struct xpc_msg flags */ #define XPC_M_DONE 0x01 /* msg has been received/consumed */ #define XPC_M_READY 0x02 /* msg is ready to be sent */ #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ - #define XPC_MSG_ADDRESS(_payload) \ ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) - - /* * Defines notify entry. * @@ -336,19 +315,17 @@ struct xpc_openclose_args { * and consumed by the intended recipient. */ struct xpc_notify { - volatile u8 type; /* type of notification */ + volatile u8 type; /* type of notification */ /* the following two fields are only used if type == XPC_N_CALL */ - xpc_notify_func func; /* user's notify function */ - void *key; /* pointer to user's key */ + xpc_notify_func func; /* user's notify function */ + void *key; /* pointer to user's key */ }; /* struct xpc_notify type of notification */ #define XPC_N_CALL 0x01 /* notify function provided by user */ - - /* * Define the structure that manages all the stuff required by a channel. In * particular, they are used to manage the messages sent across the channel. @@ -428,48 +405,48 @@ struct xpc_notify { * messages. */ struct xpc_channel { - partid_t partid; /* ID of remote partition connected */ - spinlock_t lock; /* lock for updating this structure */ - u32 flags; /* general flags */ + partid_t partid; /* ID of remote partition connected */ + spinlock_t lock; /* lock for updating this structure */ + u32 flags; /* general flags */ - enum xpc_retval reason; /* reason why channel is disconnect'g */ - int reason_line; /* line# disconnect initiated from */ + enum xpc_retval reason; /* reason why channel is disconnect'g */ + int reason_line; /* line# disconnect initiated from */ - u16 number; /* channel # */ + u16 number; /* channel # */ - u16 msg_size; /* sizeof each msg entry */ - u16 local_nentries; /* #of msg entries in local msg queue */ - u16 remote_nentries; /* #of msg entries in remote msg queue*/ + u16 msg_size; /* sizeof each msg entry */ + 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 */ - u64 remote_msgqueue_pa; /* phys addr of remote partition's */ - /* local message queue */ + struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ + /* local message queue */ + u64 remote_msgqueue_pa; /* phys addr of remote partition's */ + /* local message queue */ - atomic_t references; /* #of external references to queues */ + atomic_t references; /* #of external references to queues */ - atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ - wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ + 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 */ - /* action until channel disconnected */ + u8 delayed_IPI_flags; /* IPI 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 */ + 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 */ + xpc_channel_func func; /* user's channel function */ + void *key; /* pointer to user's key */ struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ - struct completion wdisconnect_wait; /* wait for channel disconnect */ + struct completion wdisconnect_wait; /* wait for channel disconnect */ - struct xpc_openclose_args *local_openclose_args; /* args passed on */ - /* opening or closing of channel */ + struct xpc_openclose_args *local_openclose_args; /* args passed on */ + /* opening or closing of channel */ /* various flavors of local and remote Get/Put values */ @@ -477,7 +454,7 @@ struct xpc_channel { struct xpc_gp remote_GP; /* remote Get/Put values */ struct xpc_gp w_local_GP; /* working local Get/Put values */ struct xpc_gp w_remote_GP; /* working remote Get/Put values */ - s64 next_msg_to_pull; /* Put value of next msg to pull */ + s64 next_msg_to_pull; /* Put value of next msg to pull */ /* kthread management related fields */ @@ -485,48 +462,45 @@ struct xpc_channel { // >>> allow the assigned limit be unbounded and let the idle limit be dynamic // >>> dependent on activity over the last interval of time atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ - u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ - atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ + u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ + atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ u32 kthreads_idle_limit; /* limit on #of kthreads idle */ atomic_t kthreads_active; /* #of kthreads actively working */ // >>> following field is temporary - u32 kthreads_created; /* total #of kthreads created */ + u32 kthreads_created; /* total #of kthreads created */ wait_queue_head_t idle_wq; /* idle kthread wait queue */ } ____cacheline_aligned; - /* struct xpc_channel flags */ -#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ +#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ -#define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ -#define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ -#define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ -#define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ +#define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ +#define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ +#define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ +#define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ -#define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ -#define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ +#define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ +#define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ #define XPC_C_CONNECTEDCALLOUT_MADE \ - 0x00000080 /* connected callout completed */ -#define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ -#define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ + 0x00000080 /* connected callout completed */ +#define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ +#define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ -#define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ -#define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ -#define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ -#define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ +#define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ +#define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ +#define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ +#define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ -#define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ -#define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ +#define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ +#define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ #define XPC_C_DISCONNECTINGCALLOUT \ - 0x00010000 /* disconnecting callout initiated */ + 0x00010000 /* disconnecting callout initiated */ #define XPC_C_DISCONNECTINGCALLOUT_MADE \ - 0x00020000 /* disconnecting callout completed */ -#define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ - - + 0x00020000 /* disconnecting callout completed */ +#define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ /* * Manages channels on a partition basis. There is one of these structures @@ -537,33 +511,31 @@ struct xpc_partition { /* XPC HB infrastructure */ - u8 remote_rp_version; /* version# of partition's rsvd pg */ - struct timespec remote_rp_stamp;/* time when rsvd pg was initialized */ - u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ - u64 remote_vars_pa; /* phys addr of partition's vars */ + u8 remote_rp_version; /* version# of partition's rsvd pg */ + struct timespec remote_rp_stamp; /* time when rsvd pg was initialized */ + u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ + u64 remote_vars_pa; /* phys addr of partition's vars */ u64 remote_vars_part_pa; /* phys addr of partition's vars part */ - u64 last_heartbeat; /* HB at last read */ + u64 last_heartbeat; /* HB at last read */ u64 remote_amos_page_pa; /* phys addr of partition's amos page */ - int remote_act_nasid; /* active part's act/deact nasid */ + int remote_act_nasid; /* active part's act/deact nasid */ int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */ - u32 act_IRQ_rcvd; /* IRQs since activation */ - spinlock_t act_lock; /* protect updating of act_state */ - u8 act_state; /* from XPC HB viewpoint */ - u8 remote_vars_version; /* version# of partition's vars */ - enum xpc_retval reason; /* reason partition is deactivating */ - int reason_line; /* line# deactivation initiated from */ - int reactivate_nasid; /* nasid in partition to reactivate */ - - unsigned long disengage_request_timeout; /* timeout in jiffies */ + u32 act_IRQ_rcvd; /* IRQs since activation */ + spinlock_t act_lock; /* protect updating of act_state */ + u8 act_state; /* from XPC HB viewpoint */ + u8 remote_vars_version; /* version# of partition's vars */ + enum xpc_retval reason; /* reason partition is deactivating */ + int reason_line; /* line# deactivation initiated from */ + int reactivate_nasid; /* nasid in partition to reactivate */ + + unsigned long disengage_request_timeout; /* timeout in jiffies */ struct timer_list disengage_request_timer; - /* XPC infrastructure referencing and teardown control */ volatile u8 setup_state; /* infrastructure setup state */ wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ - atomic_t references; /* #of references to infrastructure */ - + atomic_t references; /* #of references to infrastructure */ /* * NONE OF THE PRECEDING FIELDS OF THIS STRUCTURE WILL BE CLEARED WHEN @@ -572,53 +544,48 @@ struct xpc_partition { * 'nchannels' FIELD MUST BE THE FIRST OF THE FIELDS TO BE CLEARED.) */ - - u8 nchannels; /* #of defined channels supported */ - atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ - atomic_t nchannels_engaged;/* #of channels engaged with remote part */ - struct xpc_channel *channels;/* array of channel structures */ - - void *local_GPs_base; /* base address of kmalloc'd space */ - struct xpc_gp *local_GPs; /* local Get/Put values */ - void *remote_GPs_base; /* base address of kmalloc'd space */ - struct xpc_gp *remote_GPs;/* copy of remote partition's local Get/Put */ - /* values */ - u64 remote_GPs_pa; /* phys address of remote partition's local */ - /* Get/Put values */ - + u8 nchannels; /* #of defined channels supported */ + atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ + atomic_t nchannels_engaged; /* #of channels engaged with remote part */ + struct xpc_channel *channels; /* array of channel structures */ + + void *local_GPs_base; /* base address of kmalloc'd space */ + struct xpc_gp *local_GPs; /* local Get/Put values */ + void *remote_GPs_base; /* base address of kmalloc'd space */ + struct xpc_gp *remote_GPs; /* copy of remote partition's local Get/Put */ + /* values */ + u64 remote_GPs_pa; /* phys address of remote partition's local */ + /* Get/Put values */ /* fields used to pass args when opening or closing a channel */ - 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 */ - u64 remote_openclose_args_pa; /* phys addr of remote's args */ - + 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 */ + u64 remote_openclose_args_pa; /* phys addr of remote's args */ /* IPI sending, receiving and handling related fields */ - int remote_IPI_nasid; /* nasid of where to send IPIs */ - int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ - AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */ + int remote_IPI_nasid; /* nasid of where to send IPIs */ + int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ + 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 */ - u64 local_IPI_amo; /* IPI amo flags yet to be handled */ - char IPI_owner[8]; /* IPI owner's name */ - struct timer_list dropped_IPI_timer; /* dropped IPI timer */ - - spinlock_t IPI_lock; /* IPI handler lock */ + AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */ + u64 local_IPI_amo; /* IPI amo flags yet to be handled */ + char IPI_owner[8]; /* IPI owner's name */ + struct timer_list dropped_IPI_timer; /* dropped IPI timer */ + spinlock_t IPI_lock; /* IPI handler lock */ /* channel manager related fields */ atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ - wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ + wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ } ____cacheline_aligned; - /* struct xpc_partition act_state values (for XPC HB) */ #define XPC_P_INACTIVE 0x00 /* partition is not active */ @@ -627,11 +594,9 @@ struct xpc_partition { #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ - #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ xpc_deactivate_partition(__LINE__, (_p), (_reason)) - /* struct xpc_partition setup_state values */ #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ @@ -639,8 +604,6 @@ struct xpc_partition { #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ #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 @@ -648,22 +611,17 @@ struct xpc_partition { */ #define XPC_P_DROPPED_IPI_WAIT (0.25 * HZ) - /* number of seconds to wait for other partitions to disengage */ #define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90 /* interval in seconds to print 'waiting disengagement' messages */ #define XPC_DISENGAGE_PRINTMSG_INTERVAL 10 - #define XPC_PARTID(_p) ((partid_t) ((_p) - &xpc_partitions[0])) - - /* found in xp_main.c */ extern struct xpc_registration xpc_registrations[]; - /* found in xpc_main.c */ extern struct device *xpc_part; extern struct device *xpc_chan; @@ -676,7 +634,6 @@ 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); - /* found in xpc_partition.c */ extern int xpc_exiting; extern struct xpc_vars *xpc_vars; @@ -696,10 +653,9 @@ extern void xpc_mark_partition_inactive(struct xpc_partition *); extern void xpc_discovery(void); extern void xpc_check_remote_hb(void); extern void xpc_deactivate_partition(const int, struct xpc_partition *, - enum xpc_retval); + enum xpc_retval); extern enum xpc_retval xpc_initiate_partid_to_nasids(partid_t, void *); - /* found in xpc_channel.c */ extern void xpc_initiate_connect(int); extern void xpc_initiate_disconnect(int); @@ -714,13 +670,11 @@ extern void xpc_process_channel_activity(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 *, - enum xpc_retval, unsigned long *); + enum xpc_retval, unsigned long *); extern void xpc_disconnect_callout(struct xpc_channel *, enum xpc_retval); extern void xpc_partition_going_down(struct xpc_partition *, enum xpc_retval); extern void xpc_teardown_infrastructure(struct xpc_partition *); - - static inline void xpc_wakeup_channel_mgr(struct xpc_partition *part) { @@ -729,8 +683,6 @@ xpc_wakeup_channel_mgr(struct xpc_partition *part) } } - - /* * These next two inlines are used to keep us from tearing down a channel's * msg queues while a thread may be referencing them. @@ -752,12 +704,9 @@ xpc_msgqueue_deref(struct xpc_channel *ch) } } - - #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) - /* * These two inlines are used to keep us from tearing down a partition's * setup infrastructure while a thread may be referencing it. @@ -767,7 +716,6 @@ xpc_part_deref(struct xpc_partition *part) { s32 refs = atomic_dec_return(&part->references); - DBUG_ON(refs < 0); if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) { wake_up(&part->teardown_wq); @@ -779,7 +727,6 @@ xpc_part_ref(struct xpc_partition *part) { int setup; - atomic_inc(&part->references); setup = (part->setup_state == XPC_P_SETUP); if (!setup) { @@ -788,8 +735,6 @@ xpc_part_ref(struct xpc_partition *part) return setup; } - - /* * The following macro is to be used for the setting of the reason and * reason_line fields in both the struct xpc_channel and struct xpc_partition @@ -801,8 +746,6 @@ xpc_part_ref(struct xpc_partition *part) (_p)->reason_line = _line; \ } - - /* * This next set of inlines are used to keep track of when a partition is * potentially engaged in accessing memory belonging to another partition. @@ -812,23 +755,24 @@ static inline void xpc_mark_partition_engaged(struct xpc_partition *part) { unsigned long irq_flags; - AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa + - (XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t))); - + AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + + (XPC_ENGAGED_PARTITIONS_AMO * + sizeof(AMO_t))); local_irq_save(irq_flags); /* set bit corresponding to our partid in remote partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, - (1UL << sn_partition_id)); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, + (1UL << sn_partition_id)); /* * 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. */ - (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo-> - variable), xp_nofault_PIOR_target)); + (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> + variable), + xp_nofault_PIOR_target)); local_irq_restore(irq_flags); } @@ -837,23 +781,24 @@ static inline void xpc_mark_partition_disengaged(struct xpc_partition *part) { unsigned long irq_flags; - AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa + - (XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t))); - + AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + + (XPC_ENGAGED_PARTITIONS_AMO * + sizeof(AMO_t))); local_irq_save(irq_flags); /* clear bit corresponding to our partid in remote partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND, - ~(1UL << sn_partition_id)); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, + ~(1UL << sn_partition_id)); /* * 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. */ - (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo-> - variable), xp_nofault_PIOR_target)); + (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> + variable), + xp_nofault_PIOR_target)); local_irq_restore(irq_flags); } @@ -862,23 +807,23 @@ static inline void xpc_request_partition_disengage(struct xpc_partition *part) { unsigned long irq_flags; - AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa + - (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); - + AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + + (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); local_irq_save(irq_flags); /* set bit corresponding to our partid in remote partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, - (1UL << sn_partition_id)); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, + (1UL << sn_partition_id)); /* * 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. */ - (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo-> - variable), xp_nofault_PIOR_target)); + (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> + variable), + xp_nofault_PIOR_target)); local_irq_restore(irq_flags); } @@ -887,23 +832,23 @@ static inline void xpc_cancel_partition_disengage_request(struct xpc_partition *part) { unsigned long irq_flags; - AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa + - (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); - + AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + + (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); local_irq_save(irq_flags); /* clear bit corresponding to our partid in remote partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND, - ~(1UL << sn_partition_id)); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, + ~(1UL << sn_partition_id)); /* * 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. */ - (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo-> - variable), xp_nofault_PIOR_target)); + (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> + variable), + xp_nofault_PIOR_target)); local_irq_restore(irq_flags); } @@ -913,10 +858,9 @@ xpc_partition_engaged(u64 partid_mask) { AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO; - /* return our partition's AMO variable ANDed with partid_mask */ - return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) & - partid_mask); + return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) & + partid_mask); } static inline u64 @@ -924,10 +868,9 @@ xpc_partition_disengage_requested(u64 partid_mask) { AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO; - /* return our partition's AMO variable ANDed with partid_mask */ - return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) & - partid_mask); + return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) & + partid_mask); } static inline void @@ -935,10 +878,9 @@ xpc_clear_partition_engaged(u64 partid_mask) { AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO; - /* clear bit(s) based on partid_mask in our partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND, - ~partid_mask); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, + ~partid_mask); } static inline void @@ -946,14 +888,11 @@ xpc_clear_partition_disengage_request(u64 partid_mask) { AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO; - /* clear bit(s) based on partid_mask in our partition's AMO */ - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND, - ~partid_mask); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, + ~partid_mask); } - - /* * The following set of macros and inlines are used for the sending and * receiving of IPIs (also known as IRQs). There are two flavors of IPIs, @@ -964,20 +903,18 @@ xpc_clear_partition_disengage_request(u64 partid_mask) static inline u64 xpc_IPI_receive(AMO_t *amo) { - return FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_CLEAR); + return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR); } - static inline enum xpc_retval xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) { int ret = 0; unsigned long irq_flags; - local_irq_save(irq_flags); - FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, flag); + FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, flag); sn_send_IPI_phys(nasid, phys_cpuid, vector, 0); /* @@ -986,15 +923,14 @@ xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) * 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. */ - ret = xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->variable), - xp_nofault_PIOR_target)); + ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable), + xp_nofault_PIOR_target)); local_irq_restore(irq_flags); return ((ret == 0) ? xpcSuccess : xpcPioReadError); } - /* * IPIs associated with SGI_XPC_ACTIVATE IRQ. */ @@ -1004,47 +940,47 @@ xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) */ static inline void xpc_activate_IRQ_send(u64 amos_page_pa, int from_nasid, int to_nasid, - int to_phys_cpuid) + 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))); - + AMO_t *amos = (AMO_t *)__va(amos_page_pa + + (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t))); - (void) xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid, - to_phys_cpuid, SGI_XPC_ACTIVATE); + (void)xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid, + to_phys_cpuid, SGI_XPC_ACTIVATE); } static inline void xpc_IPI_send_activate(struct xpc_vars *vars) { xpc_activate_IRQ_send(vars->amos_page_pa, cnodeid_to_nasid(0), - vars->act_nasid, vars->act_phys_cpuid); + vars->act_nasid, vars->act_phys_cpuid); } static inline void xpc_IPI_send_activated(struct xpc_partition *part) { xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0), - part->remote_act_nasid, part->remote_act_phys_cpuid); + part->remote_act_nasid, + part->remote_act_phys_cpuid); } static inline void xpc_IPI_send_reactivate(struct xpc_partition *part) { xpc_activate_IRQ_send(xpc_vars->amos_page_pa, part->reactivate_nasid, - xpc_vars->act_nasid, xpc_vars->act_phys_cpuid); + xpc_vars->act_nasid, xpc_vars->act_phys_cpuid); } static inline void xpc_IPI_send_disengage(struct xpc_partition *part) { xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0), - part->remote_act_nasid, part->remote_act_phys_cpuid); + part->remote_act_nasid, + part->remote_act_phys_cpuid); } - /* * IPIs associated with SGI_XPC_NOTIFY IRQ. */ @@ -1058,18 +994,16 @@ xpc_IPI_send_disengage(struct xpc_partition *part) static inline void xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string, - unsigned long *irq_flags) + unsigned long *irq_flags) { struct xpc_partition *part = &xpc_partitions[ch->partid]; enum xpc_retval ret; - if (likely(part->act_state != XPC_P_DEACTIVATING)) { ret = xpc_IPI_send(part->remote_IPI_amo_va, - (u64) ipi_flag << (ch->number * 8), - part->remote_IPI_nasid, - part->remote_IPI_phys_cpuid, - SGI_XPC_NOTIFY); + (u64)ipi_flag << (ch->number * 8), + part->remote_IPI_nasid, + part->remote_IPI_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); if (unlikely(ret != xpcSuccess)) { @@ -1084,7 +1018,6 @@ xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string, } } - /* * Make it look like the remote partition, which is associated with the * specified channel, sent us an IPI. This faked IPI will be handled @@ -1095,18 +1028,16 @@ xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string, static inline void xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag, - char *ipi_flag_string) + char *ipi_flag_string) { struct xpc_partition *part = &xpc_partitions[ch->partid]; - - FETCHOP_STORE_OP(TO_AMO((u64) &part->local_IPI_amo_va->variable), - FETCHOP_OR, ((u64) ipi_flag << (ch->number * 8))); + FETCHOP_STORE_OP(TO_AMO((u64)&part->local_IPI_amo_va->variable), + FETCHOP_OR, ((u64)ipi_flag << (ch->number * 8))); dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n", ipi_flag_string, ch->partid, ch->number); } - /* * 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 @@ -1121,7 +1052,6 @@ xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag, #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)) @@ -1129,13 +1059,11 @@ xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag, #define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x0f0f0f0f0f0f0f0f)) #define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x1010101010101010)) - static inline void xpc_IPI_send_closerequest(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(ch, XPC_IPI_CLOSEREQUEST, irq_flags); @@ -1152,7 +1080,6 @@ xpc_IPI_send_openrequest(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; @@ -1164,7 +1091,6 @@ xpc_IPI_send_openreply(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); @@ -1184,7 +1110,6 @@ xpc_IPI_send_local_msgrequest(struct xpc_channel *ch) XPC_NOTIFY_IRQ_SEND_LOCAL(ch, XPC_IPI_MSGREQUEST); } - /* * Memory for XPC's AMO variables is allocated by the MSPEC driver. These * pages are located in the lowest granule. The lowest granule uses 4k pages @@ -1201,13 +1126,10 @@ xpc_IPI_init(int index) { AMO_t *amo = xpc_vars->amos_page + index; - - (void) xpc_IPI_receive(amo); /* clear AMO variable */ + (void)xpc_IPI_receive(amo); /* clear AMO variable */ return amo; } - - static inline enum xpc_retval xpc_map_bte_errors(bte_result_t error) { @@ -1220,22 +1142,31 @@ xpc_map_bte_errors(bte_result_t error) return xpcBteUnmappedError; } switch (error) { - case BTE_SUCCESS: return xpcSuccess; - case BTEFAIL_DIR: return xpcBteDirectoryError; - case BTEFAIL_POISON: return xpcBtePoisonError; - case BTEFAIL_WERR: return xpcBteWriteError; - case BTEFAIL_ACCESS: return xpcBteAccessError; - case BTEFAIL_PWERR: return xpcBtePWriteError; - case BTEFAIL_PRERR: return xpcBtePReadError; - case BTEFAIL_TOUT: return xpcBteTimeOutError; - case BTEFAIL_XTERR: return xpcBteXtalkError; - case BTEFAIL_NOTAVAIL: return xpcBteNotAvailable; - default: return xpcBteUnmappedError; + case BTE_SUCCESS: + return xpcSuccess; + case BTEFAIL_DIR: + return xpcBteDirectoryError; + case BTEFAIL_POISON: + return xpcBtePoisonError; + case BTEFAIL_WERR: + return xpcBteWriteError; + case BTEFAIL_ACCESS: + return xpcBteAccessError; + case BTEFAIL_PWERR: + return xpcBtePWriteError; + case BTEFAIL_PRERR: + return xpcBtePReadError; + case BTEFAIL_TOUT: + return xpcBteTimeOutError; + case BTEFAIL_XTERR: + return xpcBteXtalkError; + case BTEFAIL_NOTAVAIL: + return xpcBteNotAvailable; + default: + return xpcBteUnmappedError; } } - - /* * Check to see if there is any channel activity to/from the specified * partition. @@ -1246,7 +1177,6 @@ xpc_check_for_channel_activity(struct xpc_partition *part) u64 IPI_amo; unsigned long irq_flags; - IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va); if (IPI_amo == 0) { return; @@ -1262,6 +1192,4 @@ xpc_check_for_channel_activity(struct xpc_partition *part) xpc_wakeup_channel_mgr(part); } - #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ - |