depends on !IA64_HP_SIM
default y
-config IA64_SGI_SN_XP
- tristate "Support communication between SGI SSIs"
- depends on IA64_GENERIC || IA64_SGI_SN2
- select IA64_UNCACHED_ALLOCATOR
- help
- An SGI machine can be divided into multiple Single System
- Images which act independently of each other and have
- hardware based memory protection from the others. Enabling
- this feature will allow for direct communication between SSIs
- based on a network adapter and DMA messaging.
-
config FORCE_MAX_ZONEORDER
int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
range 11 17 if !HUGETLB_PAGE
unw_init_running(kdump_cpu_freeze, NULL);
break;
case DIE_MCA_MONARCH_LEAVE:
- /* die_register->signr indicate if MCA is recoverable */
- if (kdump_on_fatal_mca && !args->signr) {
+ /* *(nd->data) indicate if MCA is recoverable */
+ if (kdump_on_fatal_mca && !(*(nd->data))) {
atomic_set(&kdump_in_progress, 1);
*(nd->monarch_cpu) = -1;
machine_kdump_on_init();
br.call.sptk.many rp=syscall_trace_leave // give parent a chance to catch return value
.ret3:
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
+(pUStk) rsm psr.i // disable interrupts
br.cond.sptk .work_pending_syscall_end
strace_error:
# define IA64_MCA_DEBUG(fmt...)
#endif
+#define NOTIFY_INIT(event, regs, arg, spin) \
+do { \
+ if ((notify_die((event), "INIT", (regs), (arg), 0, 0) \
+ == NOTIFY_STOP) && ((spin) == 1)) \
+ ia64_mca_spin(__func__); \
+} while (0)
+
+#define NOTIFY_MCA(event, regs, arg, spin) \
+do { \
+ if ((notify_die((event), "MCA", (regs), (arg), 0, 0) \
+ == NOTIFY_STOP) && ((spin) == 1)) \
+ ia64_mca_spin(__func__); \
+} while (0)
+
/* Used by mca_asm.S */
DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
/* Mask all interrupts */
local_irq_save(flags);
- if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", get_irq_regs(),
- (long)&nd, 0, 0) == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+
+ NOTIFY_MCA(DIE_MCA_RENDZVOUS_ENTER, get_irq_regs(), (long)&nd, 1);
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_DONE;
/* Register with the SAL monarch that the slave has
*/
ia64_sal_mc_rendez();
- if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", get_irq_regs(),
- (long)&nd, 0, 0) == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_MCA(DIE_MCA_RENDZVOUS_PROCESS, get_irq_regs(), (long)&nd, 1);
/* Wait for the monarch cpu to exit. */
while (monarch_cpu != -1)
cpu_relax(); /* spin until monarch leaves */
- if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", get_irq_regs(),
- (long)&nd, 0, 0) == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_MCA(DIE_MCA_RENDZVOUS_LEAVE, get_irq_regs(), (long)&nd, 1);
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
/* Enable all interrupts */
int recover, cpu = smp_processor_id();
struct task_struct *previous_current;
struct ia64_mca_notify_die nd =
- { .sos = sos, .monarch_cpu = &monarch_cpu };
+ { .sos = sos, .monarch_cpu = &monarch_cpu, .data = &recover };
static atomic_t mca_count;
static cpumask_t mca_cpu;
previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
- if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_MCA(DIE_MCA_MONARCH_ENTER, regs, (long)&nd, 1);
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
if (sos->monarch) {
* does not work.
*/
ia64_mca_wakeup_all();
- if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
} else {
while (cpu_isset(cpu, mca_cpu))
cpu_relax(); /* spin until monarch wakes us */
- }
+ }
+
+ NOTIFY_MCA(DIE_MCA_MONARCH_PROCESS, regs, (long)&nd, 1);
/* Get the MCA error record and log it */
ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA);
mca_insert_tr(0x2); /*Reload dynamic itrs*/
}
- if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_MCA(DIE_MCA_MONARCH_LEAVE, regs, (long)&nd, 1);
if (atomic_dec_return(&mca_count) > 0) {
int i;
struct ia64_mca_notify_die nd =
{ .sos = sos, .monarch_cpu = &monarch_cpu };
- (void) notify_die(DIE_INIT_ENTER, "INIT", regs, (long)&nd, 0, 0);
+ NOTIFY_INIT(DIE_INIT_ENTER, regs, (long)&nd, 0);
mprintk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
sos->proc_state_param, cpu, sos->monarch);
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_INIT;
while (monarch_cpu == -1)
cpu_relax(); /* spin until monarch enters */
- if (notify_die(DIE_INIT_SLAVE_ENTER, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
- if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+
+ NOTIFY_INIT(DIE_INIT_SLAVE_ENTER, regs, (long)&nd, 1);
+ NOTIFY_INIT(DIE_INIT_SLAVE_PROCESS, regs, (long)&nd, 1);
+
while (monarch_cpu != -1)
cpu_relax(); /* spin until monarch leaves */
- if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+
+ NOTIFY_INIT(DIE_INIT_SLAVE_LEAVE, regs, (long)&nd, 1);
+
mprintk("Slave on cpu %d returning to normal service.\n", cpu);
set_curr_task(cpu, previous_current);
ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
}
monarch_cpu = cpu;
- if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_INIT(DIE_INIT_MONARCH_ENTER, regs, (long)&nd, 1);
/*
* Wait for a bit. On some machines (e.g., HP's zx2000 and zx6000, INIT can be
* to default_monarch_init_process() above and just print all the
* tasks.
*/
- if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
- if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__func__);
+ NOTIFY_INIT(DIE_INIT_MONARCH_PROCESS, regs, (long)&nd, 1);
+ NOTIFY_INIT(DIE_INIT_MONARCH_LEAVE, regs, (long)&nd, 1);
+
mprintk("\nINIT dump complete. Monarch on cpu %d returning to normal service.\n", cpu);
atomic_dec(&monarchs);
set_curr_task(cpu, previous_current);
printk(KERN_INFO "Increasing MCA rendezvous timeout from "
"%ld to %ld milliseconds\n", timeout, isrv.v0);
timeout = isrv.v0;
- (void) notify_die(DIE_MCA_NEW_TIMEOUT, "MCA", NULL, timeout, 0, 0);
+ NOTIFY_MCA(DIE_MCA_NEW_TIMEOUT, NULL, timeout, 0);
continue;
}
printk(KERN_ERR "Failed to register rendezvous interrupt "
}
static int
-pfm_do_interrupt_handler(int irq, void *arg, struct pt_regs *regs)
+pfm_do_interrupt_handler(void *arg, struct pt_regs *regs)
{
struct task_struct *task;
pfm_context_t *ctx;
start_cycles = ia64_get_itc();
- ret = pfm_do_interrupt_handler(irq, arg, regs);
+ ret = pfm_do_interrupt_handler(arg, regs);
total_cycles = ia64_get_itc();
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
-# Copyright (C) 1999,2001-2006 Silicon Graphics, Inc. All Rights Reserved.
+# Copyright (C) 1999,2001-2006,2008 Silicon Graphics, Inc. All Rights Reserved.
#
EXTRA_CFLAGS += -Iarch/ia64/sn/include
sn2/
obj-$(CONFIG_IA64_GENERIC) += machvec.o
obj-$(CONFIG_SGI_TIOCX) += tiocx.o
-obj-$(CONFIG_IA64_SGI_SN_XP) += xp.o
-xp-y := xp_main.o xp_nofault.o
-obj-$(CONFIG_IA64_SGI_SN_XP) += xpc.o
-xpc-y := xpc_main.o xpc_channel.o xpc_partition.o
-obj-$(CONFIG_IA64_SGI_SN_XP) += xpnet.o
obj-$(CONFIG_PCI_MSI) += msi_sn.o
{
if (request_irq(SGI_II_ERROR, hub_eint_handler, IRQF_SHARED,
- "SN_hub_error", (void *)hubdev_info)) {
- printk("hub_error_init: Failed to request_irq for 0x%p\n",
+ "SN_hub_error", hubdev_info)) {
+ printk(KERN_ERR "hub_error_init: Failed to request_irq for 0x%p\n",
hubdev_info);
return;
}
*
* Simply call tioce_do_dma_map() to create a map with the barrier bit set
* in the address.
- */ static u64
+ */
+static u64
tioce_dma_consistent(struct pci_dev *pdev, u64 paddr, size_t byte_count, int dma_flags)
{
return tioce_do_dma_map(pdev, paddr, byte_count, 1, dma_flags);
*
* Handle a CE error interrupt. Simply a wrapper around a SAL call which
* defers processing to the SGI prom.
- */ static irqreturn_t
+ */
+static irqreturn_t
tioce_error_intr_handler(int irq, void *arg)
{
struct tioce_common *soft = arg;
driver (SCSI/ATA) which supports enclosures
or a SCSI enclosure device (SES) to use these services.
+config SGI_XP
+ tristate "Support communication between SGI SSIs"
+ depends on IA64_GENERIC || IA64_SGI_SN2
+ select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+ select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+ ---help---
+ An SGI machine can be divided into multiple Single System
+ Images which act independently of each other and have
+ hardware based memory protection from the others. Enabling
+ this feature will allow for direct communication between SSIs
+ based on a network adapter and DMA messaging.
+
endif # MISC_DEVICES
obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
+obj-$(CONFIG_SGI_XP) += sgi-xp/
--- /dev/null
+#
+# Makefile for SGI's XP devices.
+#
+
+obj-$(CONFIG_SGI_XP) += xp.o
+xp-y := xp_main.o xp_nofault.o
+
+obj-$(CONFIG_SGI_XP) += xpc.o
+xpc-y := xpc_main.o xpc_channel.o xpc_partition.o
+
+obj-$(CONFIG_SGI_XP) += xpnet.o
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Silicon Graphics, Inc. All rights reserved.
*/
-
/*
* External Cross Partition (XP) structures and defines.
*/
-
-#ifndef _ASM_IA64_SN_XP_H
-#define _ASM_IA64_SN_XP_H
-
+#ifndef _DRIVERS_MISC_SGIXP_XP_H
+#define _DRIVERS_MISC_SGIXP_XP_H
#include <linux/cache.h>
#include <linux/hardirq.h>
#include <asm/sn/types.h>
#include <asm/sn/bte.h>
-
#ifdef USE_DBUG_ON
#define DBUG_ON(condition) BUG_ON(condition)
#else
#define DBUG_ON(condition)
#endif
-
/*
* Define the maximum number of logically defined partitions the system
* can support. It is constrained by the maximum number of hardware
*/
#define XP_MAX_PARTITIONS 64
-
/*
* Define the number of u64s required to represent all the C-brick nasids
* as a bitmap. The cross-partition kernel modules deal only with
#define XP_NASID_MASK_BYTES ((XP_MAX_PHYSNODE_ID + 7) / 8)
#define XP_NASID_MASK_WORDS ((XP_MAX_PHYSNODE_ID + 63) / 64)
-
/*
* Wrapper for bte_copy() that should it return a failure status will retry
* the bte_copy() once in the hope that the failure was due to a temporary
bte_result_t ret;
u64 pdst = ia64_tpa(vdst);
-
/*
* Ensure that the physically mapped memory is contiguous.
*
ret = bte_copy(src, pdst, len, mode, notification);
if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
- if (!in_interrupt()) {
+ if (!in_interrupt())
cond_resched();
- }
+
ret = bte_copy(src, pdst, len, mode, notification);
}
return ret;
}
-
/*
* XPC establishes channel connections between the local partition and any
* other partition that is currently up. Over these channels, kernel-level
#error XPC_NCHANNELS exceeds MAXIMUM allowed.
#endif
-
/*
* The format of an XPC message is as follows:
*
u64 payload; /* user defined portion of message */
};
-
#define XPC_MSG_PAYLOAD_OFFSET (u64) (&((struct xpc_msg *)0)->payload)
#define XPC_MSG_SIZE(_payload_size) \
L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
-
/*
* Define the return values and values passed to user's callout functions.
* (It is important to add new value codes at the end just preceding
/* 115: BTE end */
xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,
- xpcUnknownReason /* 116: unknown reason -- must be last in list */
+ xpcUnknownReason /* 116: unknown reason - must be last in enum */
};
-
/*
* Define the callout function types used by XPC to update the user on
* connection activity and state changes (via the user function registered by
* =====================+================================+=====================
*/
-typedef void (*xpc_channel_func)(enum xpc_retval reason, partid_t partid,
- int ch_number, void *data, void *key);
-
-typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
- int ch_number, void *key);
+typedef void (*xpc_channel_func) (enum xpc_retval reason, partid_t partid,
+ int ch_number, void *data, void *key);
+typedef void (*xpc_notify_func) (enum xpc_retval reason, partid_t partid,
+ int ch_number, void *key);
/*
* The following is a registration entry. There is a global array of these,
*/
struct xpc_registration {
struct mutex mutex;
- xpc_channel_func func; /* function to call */
- void *key; /* pointer to user's key */
- u16 nentries; /* #of msg entries in local msg queue */
- u16 msg_size; /* message queue's message size */
- u32 assigned_limit; /* limit on #of assigned kthreads */
- u32 idle_limit; /* limit on #of idle kthreads */
+ xpc_channel_func func; /* function to call */
+ void *key; /* pointer to user's key */
+ u16 nentries; /* #of msg entries in local msg queue */
+ u16 msg_size; /* message queue's message size */
+ u32 assigned_limit; /* limit on #of assigned kthreads */
+ u32 idle_limit; /* limit on #of idle kthreads */
} ____cacheline_aligned;
-
#define XPC_CHANNEL_REGISTERED(_c) (xpc_registrations[_c].func != NULL)
-
/* the following are valid xpc_allocate() flags */
-#define XPC_WAIT 0 /* wait flag */
-#define XPC_NOWAIT 1 /* no wait flag */
-
+#define XPC_WAIT 0 /* wait flag */
+#define XPC_NOWAIT 1 /* no wait flag */
struct xpc_interface {
- void (*connect)(int);
- void (*disconnect)(int);
- enum xpc_retval (*allocate)(partid_t, int, u32, void **);
- enum xpc_retval (*send)(partid_t, int, void *);
- enum xpc_retval (*send_notify)(partid_t, int, void *,
- xpc_notify_func, void *);
- void (*received)(partid_t, int, void *);
- enum xpc_retval (*partid_to_nasids)(partid_t, void *);
+ void (*connect) (int);
+ void (*disconnect) (int);
+ enum xpc_retval (*allocate) (partid_t, int, u32, void **);
+ enum xpc_retval (*send) (partid_t, int, void *);
+ enum xpc_retval (*send_notify) (partid_t, int, void *,
+ xpc_notify_func, void *);
+ void (*received) (partid_t, int, void *);
+ enum xpc_retval (*partid_to_nasids) (partid_t, void *);
};
-
extern struct xpc_interface xpc_interface;
extern void xpc_set_interface(void (*)(int),
- void (*)(int),
- enum xpc_retval (*)(partid_t, int, u32, void **),
- enum xpc_retval (*)(partid_t, int, void *),
- enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func,
- void *),
- void (*)(partid_t, int, void *),
- enum xpc_retval (*)(partid_t, void *));
+ void (*)(int),
+ enum xpc_retval (*)(partid_t, int, u32, void **),
+ enum xpc_retval (*)(partid_t, int, void *),
+ enum xpc_retval (*)(partid_t, int, void *,
+ xpc_notify_func, void *),
+ void (*)(partid_t, int, void *),
+ enum xpc_retval (*)(partid_t, void *));
extern void xpc_clear_interface(void);
-
extern enum xpc_retval xpc_connect(int, xpc_channel_func, void *, u16,
- u16, u32, u32);
+ u16, u32, u32);
extern void xpc_disconnect(int);
static inline enum xpc_retval
static inline enum xpc_retval
xpc_send_notify(partid_t partid, int ch_number, void *payload,
- xpc_notify_func func, void *key)
+ xpc_notify_func func, void *key)
{
return xpc_interface.send_notify(partid, ch_number, payload, func, key);
}
return xpc_interface.partid_to_nasids(partid, nasids);
}
-
extern u64 xp_nofault_PIOR_target;
extern int xp_nofault_PIOR(void *);
extern int xp_error_PIOR(void);
-
-#endif /* _ASM_IA64_SN_XP_H */
-
+#endif /* _DRIVERS_MISC_SGIXP_XP_H */
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2005 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* Cross Partition (XP) base.
*
*
*/
-
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
/*
- * Target of nofault PIO read.
+ * The export of xp_nofault_PIOR needs to happen here since it is defined
+ * in drivers/misc/sgi-xp/xp_nofault.S. The target of the nofault read is
+ * defined here.
*/
-u64 xp_nofault_PIOR_target;
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR);
+u64 xp_nofault_PIOR_target;
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
/*
* xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
* users of XPC.
*/
struct xpc_registration xpc_registrations[XPC_NCHANNELS];
-
+EXPORT_SYMBOL_GPL(xpc_registrations);
/*
* Initialize the XPC interface to indicate that XPC isn't loaded.
*/
-static enum xpc_retval xpc_notloaded(void) { return xpcNotLoaded; }
+static enum xpc_retval
+xpc_notloaded(void)
+{
+ return xpcNotLoaded;
+}
struct xpc_interface xpc_interface = {
- (void (*)(int)) xpc_notloaded,
- (void (*)(int)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, u32, void **)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, void *)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func, void *))
- xpc_notloaded,
- (void (*)(partid_t, int, void *)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, void *)) xpc_notloaded
+ (void (*)(int))xpc_notloaded,
+ (void (*)(int))xpc_notloaded,
+ (enum xpc_retval(*)(partid_t, int, u32, void **))xpc_notloaded,
+ (enum xpc_retval(*)(partid_t, int, void *))xpc_notloaded,
+ (enum xpc_retval(*)(partid_t, int, void *, xpc_notify_func, void *))
+ xpc_notloaded,
+ (void (*)(partid_t, int, void *))xpc_notloaded,
+ (enum xpc_retval(*)(partid_t, void *))xpc_notloaded
};
-
+EXPORT_SYMBOL_GPL(xpc_interface);
/*
* XPC calls this when it (the XPC module) has been loaded.
*/
void
-xpc_set_interface(void (*connect)(int),
- void (*disconnect)(int),
- enum xpc_retval (*allocate)(partid_t, int, u32, void **),
- enum xpc_retval (*send)(partid_t, int, void *),
- enum xpc_retval (*send_notify)(partid_t, int, void *,
- xpc_notify_func, void *),
- void (*received)(partid_t, int, void *),
- enum xpc_retval (*partid_to_nasids)(partid_t, void *))
+xpc_set_interface(void (*connect) (int),
+ void (*disconnect) (int),
+ enum xpc_retval (*allocate) (partid_t, int, u32, void **),
+ enum xpc_retval (*send) (partid_t, int, void *),
+ enum xpc_retval (*send_notify) (partid_t, int, void *,
+ xpc_notify_func, void *),
+ void (*received) (partid_t, int, void *),
+ enum xpc_retval (*partid_to_nasids) (partid_t, void *))
{
xpc_interface.connect = connect;
xpc_interface.disconnect = disconnect;
xpc_interface.received = received;
xpc_interface.partid_to_nasids = partid_to_nasids;
}
-
+EXPORT_SYMBOL_GPL(xpc_set_interface);
/*
* XPC calls this when it (the XPC module) is being unloaded.
void
xpc_clear_interface(void)
{
- xpc_interface.connect = (void (*)(int)) xpc_notloaded;
- xpc_interface.disconnect = (void (*)(int)) xpc_notloaded;
- xpc_interface.allocate = (enum xpc_retval (*)(partid_t, int, u32,
- void **)) xpc_notloaded;
- xpc_interface.send = (enum xpc_retval (*)(partid_t, int, void *))
- xpc_notloaded;
- xpc_interface.send_notify = (enum xpc_retval (*)(partid_t, int, void *,
- xpc_notify_func, void *)) xpc_notloaded;
+ xpc_interface.connect = (void (*)(int))xpc_notloaded;
+ xpc_interface.disconnect = (void (*)(int))xpc_notloaded;
+ xpc_interface.allocate = (enum xpc_retval(*)(partid_t, int, u32,
+ void **))xpc_notloaded;
+ xpc_interface.send = (enum xpc_retval(*)(partid_t, int, void *))
+ xpc_notloaded;
+ xpc_interface.send_notify = (enum xpc_retval(*)(partid_t, int, void *,
+ xpc_notify_func,
+ void *))xpc_notloaded;
xpc_interface.received = (void (*)(partid_t, int, void *))
- xpc_notloaded;
- xpc_interface.partid_to_nasids = (enum xpc_retval (*)(partid_t, void *))
- xpc_notloaded;
+ xpc_notloaded;
+ xpc_interface.partid_to_nasids = (enum xpc_retval(*)(partid_t, void *))
+ xpc_notloaded;
}
-
+EXPORT_SYMBOL_GPL(xpc_clear_interface);
/*
* Register for automatic establishment of a channel connection whenever
*/
enum xpc_retval
xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
- u16 nentries, u32 assigned_limit, u32 idle_limit)
+ u16 nentries, u32 assigned_limit, u32 idle_limit)
{
struct xpc_registration *registration;
-
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
DBUG_ON(payload_size == 0 || nentries == 0);
DBUG_ON(func == NULL);
registration = &xpc_registrations[ch_number];
- if (mutex_lock_interruptible(®istration->mutex) != 0) {
+ if (mutex_lock_interruptible(®istration->mutex) != 0)
return xpcInterrupted;
- }
/* if XPC_CHANNEL_REGISTERED(ch_number) */
if (registration->func != NULL) {
return xpcSuccess;
}
-
+EXPORT_SYMBOL_GPL(xpc_connect);
/*
* Remove the registration for automatic connection of the specified channel
{
struct xpc_registration *registration;
-
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
registration = &xpc_registrations[ch_number];
return;
}
-
+EXPORT_SYMBOL_GPL(xpc_disconnect);
int __init
xp_init(void)
{
int ret, ch_number;
- u64 func_addr = *(u64 *) xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *) xp_error_PIOR;
+ u64 func_addr = *(u64 *)xp_nofault_PIOR;
+ u64 err_func_addr = *(u64 *)xp_error_PIOR;
-
- if (!ia64_platform_is("sn2")) {
+ if (!ia64_platform_is("sn2"))
return -ENODEV;
- }
/*
* Register a nofault code region which performs a cross-partition
* least some CPUs on Shubs <= v1.2, which unfortunately we have to
* work around).
*/
- if ((ret = sn_register_nofault_code(func_addr, err_func_addr,
- err_func_addr, 1, 1)) != 0) {
+ ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
+ 1, 1);
+ if (ret != 0) {
printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
- ret);
+ ret);
}
/*
* Setup the nofault PIO read target. (There is no special reason why
* SH_IPI_ACCESS was selected.)
*/
- if (is_shub2()) {
+ if (is_shub2())
xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
- } else {
+ else
xp_nofault_PIOR_target = SH1_IPI_ACCESS;
- }
/* initialize the connection registration mutex */
- for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++) {
+ for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++)
mutex_init(&xpc_registrations[ch_number].mutex);
- }
return 0;
}
-module_init(xp_init);
+module_init(xp_init);
void __exit
xp_exit(void)
{
- u64 func_addr = *(u64 *) xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *) xp_error_PIOR;
-
+ u64 func_addr = *(u64 *)xp_nofault_PIOR;
+ u64 err_func_addr = *(u64 *)xp_error_PIOR;
/* unregister the PIO read nofault code region */
- (void) sn_register_nofault_code(func_addr, err_func_addr,
- err_func_addr, 1, 0);
+ (void)sn_register_nofault_code(func_addr, err_func_addr,
+ err_func_addr, 1, 0);
}
-module_exit(xp_exit);
+module_exit(xp_exit);
MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition (XP) base");
MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(xp_nofault_PIOR);
-EXPORT_SYMBOL(xp_nofault_PIOR_target);
-EXPORT_SYMBOL(xpc_registrations);
-EXPORT_SYMBOL(xpc_interface);
-EXPORT_SYMBOL(xpc_clear_interface);
-EXPORT_SYMBOL(xpc_set_interface);
-EXPORT_SYMBOL(xpc_connect);
-EXPORT_SYMBOL(xpc_disconnect);
-
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* The xp_nofault_PIOR function takes a pointer to a remote PIO register
* and attempts to load and consume a value from it. This function
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* Cross Partition Communication (XPC) structures and macros.
*/
-#ifndef _ASM_IA64_SN_XPC_H
-#define _ASM_IA64_SN_XPC_H
-
+#ifndef _DRIVERS_MISC_SGIXP_XPC_H
+#define _DRIVERS_MISC_SGIXP_XPC_H
#include <linux/interrupt.h>
#include <linux/sysctl.h>
#include <asm/sn/addrs.h>
#include <asm/sn/mspec.h>
#include <asm/sn/shub_mmr.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
/*
* XPC Version numbers consist of a major and minor number. XPC can always
#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
/* define the process name of the discovery thread */
#define XPC_DISCOVERY_THREAD_NAME "xpc_discovery"
-
/*
* the reserved page
*
u8 partid; /* SAL: partition ID */
u8 version;
u8 pad1[6]; /* align to next u64 in cacheline */
- volatile u64 vars_pa;
+ u64 vars_pa; /* physical address of struct xpc_vars */
struct timespec stamp; /* time when reserved page was setup by XPC */
u64 pad2[9]; /* align to last u64 in cacheline */
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))
+ (_version >= _XPC_VERSION(1, 1))
/*
* compare stamps - the return value is:
{
int ret;
-
- if ((ret = stamp1->tv_sec - stamp2->tv_sec) == 0) {
+ ret = stamp1->tv_sec - stamp2->tv_sec;
+ if (ret == 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)
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))
-
+ (_version >= _XPC_VERSION(3, 1))
static inline int
xpc_hb_allowed(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
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.
#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.
*
* occupies half a cacheline.
*/
struct xpc_vars_part {
- volatile u64 magic;
+ u64 magic;
u64 openclose_args_pa; /* physical address of open and close args */
u64 GPs_pa; /* physical address of Get/Put values */
* 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 */
#define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
-#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars))
+#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars))
-#define XPC_RP_PART_NASIDS(_rp) (u64 *) ((u8 *) _rp + XPC_RP_HEADER_SIZE)
+#define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE))
#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#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)
-
+#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
#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.
*/
struct xpc_gp {
- volatile s64 get; /* Get value */
- volatile s64 put; /* Put value */
+ s64 get; /* Get value */
+ s64 put; /* Put value */
};
#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.
#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.
*
* and consumed by the intended recipient.
*/
struct xpc_notify {
- volatile u8 type; /* type of notification */
+ 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.
* 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 */
+ /* opening or closing of channel */
/* various flavors of local and remote Get/Put values */
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 */
-// >>> rethink having kthreads_assigned_limit and kthreads_idle_limit; perhaps
-// >>> 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 */
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_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 */
#define XPC_C_DISCONNECTINGCALLOUT_MADE \
0x00020000 /* disconnecting callout completed */
-#define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */
-
-
+#define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */
/*
* Manages channels on a partition basis. There is one of these structures
/* 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 */
+ 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
* '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 */
+ 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 */
-
+ /* 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 */
-
- 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 */
+ 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 */
- 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 */
#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 */
#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
*/
#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;
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;
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);
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)
{
- if (atomic_inc_return(&part->channel_mgr_requests) == 1) {
+ if (atomic_inc_return(&part->channel_mgr_requests) == 1)
wake_up(&part->channel_mgr_wq);
- }
}
-
-
/*
* These next two inlines are used to keep us from tearing down a channel's
* msg queues while a thread may be referencing them.
s32 refs = atomic_dec_return(&ch->references);
DBUG_ON(refs < 0);
- if (refs == 0) {
+ if (refs == 0)
xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
- }
}
-
-
#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.
{
s32 refs = atomic_dec_return(&part->references);
-
DBUG_ON(refs < 0);
- if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) {
+ if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN)
wake_up(&part->teardown_wq);
- }
}
static inline int
{
int setup;
-
atomic_inc(&part->references);
setup = (part->setup_state == XPC_P_SETUP);
- if (!setup) {
+ if (!setup)
xpc_part_deref(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
(_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.
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);
}
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);
}
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);
}
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);
}
{
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
{
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
{
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
{
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,
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);
/*
* 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.
*/
*/
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.
*/
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)) {
- if (irq_flags != NULL) {
+ if (irq_flags != NULL)
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- }
XPC_DEACTIVATE_PARTITION(part, ret);
- if (irq_flags != NULL) {
+ if (irq_flags != NULL)
spin_lock_irqsave(&ch->lock, *irq_flags);
- }
}
}
}
-
/*
* Make it look like the remote partition, which is associated with the
* specified channel, sent us an IPI. This faked IPI will be handled
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
#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) & __IA64_UL_CONST(0x0f0f0f0f0f0f0f0f))
-#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x1010101010101010))
-
+#define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL)
+#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL)
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);
{
struct xpc_openclose_args *args = ch->local_openclose_args;
-
args->msg_size = ch->msg_size;
args->local_nentries = ch->local_nentries;
{
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_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
{
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)
{
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.
u64 IPI_amo;
unsigned long irq_flags;
-
IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va);
- if (IPI_amo == 0) {
+ if (IPI_amo == 0)
return;
- }
spin_lock_irqsave(&part->IPI_lock, irq_flags);
part->local_IPI_amo |= IPI_amo;
xpc_wakeup_channel_mgr(part);
}
-
-#endif /* _ASM_IA64_SN_XPC_H */
-
+#endif /* _DRIVERS_MISC_SGIXP_XPC_H */
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* Cross Partition Communication (XPC) channel support.
*
*
*/
-
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <asm/sn/bte.h>
#include <asm/sn/sn_sal.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
/*
* Guarantee that the kzalloc'd memory is cacheline aligned.
{
/* see if kzalloc will give us cachline aligned memory by default */
*base = kzalloc(size, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
- if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
+
+ if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
return *base;
- }
+
kfree(*base);
/* nope, we'll have to do it ourselves */
*base = kzalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
- return (void *) L1_CACHE_ALIGN((u64) *base);
-}
+ return (void *)L1_CACHE_ALIGN((u64)*base);
+}
/*
* Set up the initial values for the XPartition Communication channels.
int ch_number;
struct xpc_channel *ch;
-
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
ch->local_GP = &part->local_GPs[ch_number];
ch->local_openclose_args =
- &part->local_openclose_args[ch_number];
+ &part->local_openclose_args[ch_number];
atomic_set(&ch->kthreads_assigned, 0);
atomic_set(&ch->kthreads_idle, 0);
}
}
-
/*
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
struct timer_list *timer;
partid_t partid = XPC_PARTID(part);
-
/*
* Zero out MOST of the entry for this partition. Only the fields
* starting with `nchannels' will be zeroed. The preceding fields must
* referenced during this memset() operation.
*/
memset(&part->nchannels, 0, sizeof(struct xpc_partition) -
- offsetof(struct xpc_partition, nchannels));
+ offsetof(struct xpc_partition, nchannels));
/*
* Allocate all of the channel structures as a contiguous chunk of
* memory.
*/
part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_NCHANNELS,
- GFP_KERNEL);
+ GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
return xpcNoMemory;
part->nchannels = XPC_NCHANNELS;
-
/* allocate all the required GET/PUT values */
part->local_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
- GFP_KERNEL, &part->local_GPs_base);
+ GFP_KERNEL,
+ &part->local_GPs_base);
if (part->local_GPs == NULL) {
kfree(part->channels);
part->channels = NULL;
}
part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
- GFP_KERNEL, &part->remote_GPs_base);
+ GFP_KERNEL,
+ &part->
+ remote_GPs_base);
if (part->remote_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for remote get/put "
"values\n");
return xpcNoMemory;
}
-
/* allocate all the required open and close args */
- part->local_openclose_args = xpc_kzalloc_cacheline_aligned(
- XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
- &part->local_openclose_args_base);
+ part->local_openclose_args =
+ xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+ &part->local_openclose_args_base);
if (part->local_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for local connect args\n");
kfree(part->remote_GPs_base);
return xpcNoMemory;
}
- part->remote_openclose_args = xpc_kzalloc_cacheline_aligned(
- XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
- &part->remote_openclose_args_base);
+ part->remote_openclose_args =
+ xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+ &part->remote_openclose_args_base);
if (part->remote_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for remote connect args\n");
kfree(part->local_openclose_args_base);
return xpcNoMemory;
}
-
xpc_initialize_channels(part, partid);
atomic_set(&part->nchannels_active, 0);
atomic_set(&part->nchannels_engaged, 0);
-
/* local_IPI_amo were set to 0 by an earlier memset() */
/* Initialize this partitions AMO_t structure */
sprintf(part->IPI_owner, "xpc%02d", partid);
ret = request_irq(SGI_XPC_NOTIFY, xpc_notify_IRQ_handler, IRQF_SHARED,
- part->IPI_owner, (void *) (u64) partid);
+ part->IPI_owner, (void *)(u64)partid);
if (ret != 0) {
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
"errno=%d\n", -ret);
/* Setup a timer to check for dropped IPIs */
timer = &part->dropped_IPI_timer;
init_timer(timer);
- timer->function = (void (*)(unsigned long)) xpc_dropped_IPI_check;
- timer->data = (unsigned long) part;
+ timer->function = (void (*)(unsigned long))xpc_dropped_IPI_check;
+ timer->data = (unsigned long)part;
timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT;
add_timer(timer);
*/
part->setup_state = XPC_P_SETUP;
-
/*
* Setup the per partition specific variables required by the
* remote partition to establish channel connections with us.
*/
xpc_vars_part[partid].GPs_pa = __pa(part->local_GPs);
xpc_vars_part[partid].openclose_args_pa =
- __pa(part->local_openclose_args);
+ __pa(part->local_openclose_args);
xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid);
return xpcSuccess;
}
-
/*
* Create a wrapper that hides the underlying mechanism for pulling a cacheline
* (or multiple cachelines) from a remote partition.
*/
static enum xpc_retval
xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
- const void *src, size_t cnt)
+ const void *src, size_t cnt)
{
bte_result_t bte_ret;
-
- DBUG_ON((u64) src != L1_CACHE_ALIGN((u64) src));
- DBUG_ON((u64) dst != L1_CACHE_ALIGN((u64) dst));
+ DBUG_ON((u64)src != L1_CACHE_ALIGN((u64)src));
+ DBUG_ON((u64)dst != L1_CACHE_ALIGN((u64)dst));
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_DEACTIVATING)
return part->reason;
- }
- bte_ret = xp_bte_copy((u64) src, (u64) dst, (u64) cnt,
- (BTE_NORMAL | BTE_WACQUIRE), NULL);
- if (bte_ret == BTE_SUCCESS) {
+ bte_ret = xp_bte_copy((u64)src, (u64)dst, (u64)cnt,
+ (BTE_NORMAL | BTE_WACQUIRE), NULL);
+ if (bte_ret == BTE_SUCCESS)
return xpcSuccess;
- }
dev_dbg(xpc_chan, "xp_bte_copy() from partition %d failed, ret=%d\n",
XPC_PARTID(part), bte_ret);
return xpc_map_bte_errors(bte_ret);
}
-
/*
* Pull the remote per partition specific variables from the specified
* partition.
{
u8 buffer[L1_CACHE_BYTES * 2];
struct xpc_vars_part *pulled_entry_cacheline =
- (struct xpc_vars_part *) L1_CACHE_ALIGN((u64) buffer);
+ (struct xpc_vars_part *)L1_CACHE_ALIGN((u64)buffer);
struct xpc_vars_part *pulled_entry;
u64 remote_entry_cacheline_pa, remote_entry_pa;
partid_t partid = XPC_PARTID(part);
enum xpc_retval ret;
-
/* pull the cacheline that contains the variables we're interested in */
DBUG_ON(part->remote_vars_part_pa !=
- L1_CACHE_ALIGN(part->remote_vars_part_pa));
+ L1_CACHE_ALIGN(part->remote_vars_part_pa));
DBUG_ON(sizeof(struct xpc_vars_part) != L1_CACHE_BYTES / 2);
remote_entry_pa = part->remote_vars_part_pa +
- sn_partition_id * sizeof(struct xpc_vars_part);
+ sn_partition_id * sizeof(struct xpc_vars_part);
remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
- pulled_entry = (struct xpc_vars_part *) ((u64) pulled_entry_cacheline +
- (remote_entry_pa & (L1_CACHE_BYTES - 1)));
+ pulled_entry = (struct xpc_vars_part *)((u64)pulled_entry_cacheline +
+ (remote_entry_pa &
+ (L1_CACHE_BYTES - 1)));
ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
- (void *) remote_entry_cacheline_pa,
- L1_CACHE_BYTES);
+ (void *)remote_entry_cacheline_pa,
+ L1_CACHE_BYTES);
if (ret != xpcSuccess) {
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
"partition %d, ret=%d\n", partid, ret);
return ret;
}
-
/* see if they've been set up yet */
if (pulled_entry->magic != XPC_VP_MAGIC1 &&
- pulled_entry->magic != XPC_VP_MAGIC2) {
+ pulled_entry->magic != XPC_VP_MAGIC2) {
if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
/* validate the variables */
if (pulled_entry->GPs_pa == 0 ||
- pulled_entry->openclose_args_pa == 0 ||
- pulled_entry->IPI_amo_pa == 0) {
+ pulled_entry->openclose_args_pa == 0 ||
+ pulled_entry->IPI_amo_pa == 0) {
dev_err(xpc_chan, "partition %d's XPC vars_part for "
"partition %d are not valid\n", partid,
part->remote_GPs_pa = pulled_entry->GPs_pa;
part->remote_openclose_args_pa =
- pulled_entry->openclose_args_pa;
+ pulled_entry->openclose_args_pa;
part->remote_IPI_amo_va =
- (AMO_t *) __va(pulled_entry->IPI_amo_pa);
+ (AMO_t *)__va(pulled_entry->IPI_amo_pa);
part->remote_IPI_nasid = pulled_entry->IPI_nasid;
part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;
- if (part->nchannels > pulled_entry->nchannels) {
+ if (part->nchannels > pulled_entry->nchannels)
part->nchannels = pulled_entry->nchannels;
- }
/* let the other side know that we've pulled their variables */
xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
}
- if (pulled_entry->magic == XPC_VP_MAGIC1) {
+ if (pulled_entry->magic == XPC_VP_MAGIC1)
return xpcRetry;
- }
return xpcSuccess;
}
-
/*
* Get the IPI flags and pull the openclose args and/or remote GPs as needed.
*/
u64 IPI_amo;
enum xpc_retval ret;
-
/*
* See if there are any IPI flags to be handled.
*/
spin_lock_irqsave(&part->IPI_lock, irq_flags);
- if ((IPI_amo = part->local_IPI_amo) != 0) {
+ IPI_amo = part->local_IPI_amo;
+ if (IPI_amo != 0)
part->local_IPI_amo = 0;
- }
- spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
+ spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
ret = xpc_pull_remote_cachelines(part,
- part->remote_openclose_args,
- (void *) part->remote_openclose_args_pa,
- XPC_OPENCLOSE_ARGS_SIZE);
+ part->remote_openclose_args,
+ (void *)part->
+ remote_openclose_args_pa,
+ XPC_OPENCLOSE_ARGS_SIZE);
if (ret != xpcSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) {
ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
- (void *) part->remote_GPs_pa,
- XPC_GP_SIZE);
+ (void *)part->remote_GPs_pa,
+ XPC_GP_SIZE);
if (ret != xpcSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
return IPI_amo;
}
-
/*
* Allocate the local message queue and the notify queue.
*/
int nentries;
size_t nbytes;
-
- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->local_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->local_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
- GFP_KERNEL,
- &ch->local_msgqueue_base);
- if (ch->local_msgqueue == NULL) {
+ GFP_KERNEL,
+ &ch->local_msgqueue_base);
+ if (ch->local_msgqueue == NULL)
continue;
- }
nbytes = nentries * sizeof(struct xpc_notify);
ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
return xpcNoMemory;
}
-
/*
* Allocate the cached remote message queue.
*/
int nentries;
size_t nbytes;
-
DBUG_ON(ch->remote_nentries <= 0);
- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
nbytes = nentries * ch->msg_size;
ch->remote_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
- GFP_KERNEL,
- &ch->remote_msgqueue_base);
- if (ch->remote_msgqueue == NULL) {
+ GFP_KERNEL,
+ &ch->remote_msgqueue_base);
+ if (ch->remote_msgqueue == NULL)
continue;
- }
spin_lock_irqsave(&ch->lock, irq_flags);
if (nentries < ch->remote_nentries) {
return xpcNoMemory;
}
-
/*
* Allocate message queues and other stuff associated with a channel.
*
unsigned long irq_flags;
enum xpc_retval ret;
-
DBUG_ON(ch->flags & XPC_C_SETUP);
- if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
+ ret = xpc_allocate_local_msgqueue(ch);
+ if (ret != xpcSuccess)
return ret;
- }
- if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpcSuccess) {
+ ret = xpc_allocate_remote_msgqueue(ch);
+ if (ret != xpcSuccess) {
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
kfree(ch->notify_queue);
return xpcSuccess;
}
-
/*
* Process a connect message from a remote partition.
*
{
enum xpc_retval ret;
-
DBUG_ON(!spin_is_locked(&ch->lock));
if (!(ch->flags & XPC_C_OPENREQUEST) ||
- !(ch->flags & XPC_C_ROPENREQUEST)) {
+ !(ch->flags & XPC_C_ROPENREQUEST)) {
/* nothing more to do for now */
return;
}
ret = xpc_allocate_msgqueues(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);
- if (ret != xpcSuccess) {
+ if (ret != xpcSuccess)
XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
- }
- if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) {
+
+ if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING))
return;
- }
DBUG_ON(!(ch->flags & XPC_C_SETUP));
DBUG_ON(ch->local_msgqueue == NULL);
xpc_IPI_send_openreply(ch, irq_flags);
}
- if (!(ch->flags & XPC_C_ROPENREPLY)) {
+ if (!(ch->flags & XPC_C_ROPENREPLY))
return;
- }
DBUG_ON(ch->remote_msgqueue_pa == 0);
ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
dev_info(xpc_chan, "channel %d to partition %d connected\n",
- ch->number, ch->partid);
+ ch->number, ch->partid);
spin_unlock_irqrestore(&ch->lock, *irq_flags);
xpc_create_kthreads(ch, 1, 0);
spin_lock_irqsave(&ch->lock, *irq_flags);
}
-
/*
* Notify those who wanted to be notified upon delivery of their message.
*/
u8 notify_type;
s64 get = ch->w_remote_GP.get - 1;
-
while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
notify = &ch->notify_queue[get % ch->local_nentries];
*/
notify_type = notify->type;
if (notify_type == 0 ||
- cmpxchg(¬ify->type, notify_type, 0) !=
- notify_type) {
+ cmpxchg(¬ify->type, notify_type, 0) != notify_type) {
continue;
}
if (notify->func != NULL) {
dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
- (void *) notify, get, ch->partid, ch->number);
+ (void *)notify, get, ch->partid, ch->number);
notify->func(reason, ch->partid, ch->number,
- notify->key);
+ notify->key);
dev_dbg(xpc_chan, "notify->func() returned, "
"notify=0x%p, msg_number=%ld, partid=%d, "
- "channel=%d\n", (void *) notify, get,
+ "channel=%d\n", (void *)notify, get,
ch->partid, ch->number);
}
}
}
-
/*
* Free up message queues and other stuff that were allocated for the specified
* channel.
}
}
-
/*
* spin_lock_irqsave() is expected to be held on entry.
*/
struct xpc_partition *part = &xpc_partitions[ch->partid];
u32 channel_was_connected = (ch->flags & XPC_C_WASCONNECTED);
-
DBUG_ON(!spin_is_locked(&ch->lock));
- if (!(ch->flags & XPC_C_DISCONNECTING)) {
+ if (!(ch->flags & XPC_C_DISCONNECTING))
return;
- }
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
/* make sure all activity has settled down first */
if (atomic_read(&ch->kthreads_assigned) > 0 ||
- atomic_read(&ch->references) > 0) {
+ atomic_read(&ch->references) > 0) {
return;
}
DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
+ !(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
if (part->act_state == XPC_P_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
- if (xpc_partition_engaged(1UL << ch->partid)) {
+ if (xpc_partition_engaged(1UL << ch->partid))
return;
- }
} else {
/* as long as the other side is up do the full protocol */
- if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
+ if (!(ch->flags & XPC_C_RCLOSEREQUEST))
return;
- }
if (!(ch->flags & XPC_C_CLOSEREPLY)) {
ch->flags |= XPC_C_CLOSEREPLY;
xpc_IPI_send_closereply(ch, irq_flags);
}
- if (!(ch->flags & XPC_C_RCLOSEREPLY)) {
+ if (!(ch->flags & XPC_C_RCLOSEREPLY))
return;
- }
}
/* wake those waiting for notify completion */
if (channel_was_connected) {
dev_info(xpc_chan, "channel %d to partition %d disconnected, "
- "reason=%d\n", ch->number, ch->partid, ch->reason);
+ "reason=%d\n", ch->number, ch->partid, ch->reason);
}
if (ch->flags & XPC_C_WDISCONNECT) {
/* 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);
+ ch->delayed_IPI_flags);
spin_unlock(&part->IPI_lock);
}
ch->delayed_IPI_flags = 0;
}
}
-
/*
* 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)
+ u8 IPI_flags)
{
unsigned long irq_flags;
struct xpc_openclose_args *args =
- &part->remote_openclose_args[ch_number];
+ &part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
enum xpc_retval reason;
-
-
spin_lock_irqsave(&ch->lock, irq_flags);
again:
if ((ch->flags & XPC_C_DISCONNECTED) &&
- (ch->flags & XPC_C_WDISCONNECT)) {
+ (ch->flags & XPC_C_WDISCONNECT)) {
/*
* Delay processing IPI flags until thread waiting disconnect
* has had a chance to see that the channel is disconnected.
return;
}
-
if (IPI_flags & XPC_IPI_CLOSEREQUEST) {
dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received "
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)) {
+ 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);
+ ch_number,
+ XPC_IPI_CLOSEREQUEST);
spin_unlock(&part->IPI_lock);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
if (!(ch->flags & XPC_C_DISCONNECTING)) {
reason = args->reason;
- if (reason <= xpcSuccess || reason > xpcUnknownReason) {
+ if (reason <= xpcSuccess || reason > xpcUnknownReason)
reason = xpcUnknownReason;
- } else if (reason == xpcUnregistering) {
+ else if (reason == xpcUnregistering)
reason = xpcOtherUnregistering;
- }
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
xpc_process_disconnect(ch, &irq_flags);
}
-
if (IPI_flags & XPC_IPI_CLOSEREPLY) {
dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d,"
if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, ch_number)
- & XPC_IPI_CLOSEREQUEST)) {
+ & 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);
+ ch_number,
+ XPC_IPI_CLOSEREPLY);
spin_unlock(&part->IPI_lock);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
}
-
if (IPI_flags & XPC_IPI_OPENREQUEST) {
dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, "
ch->partid, ch->number);
if (part->act_state == XPC_P_DEACTIVATING ||
- (ch->flags & XPC_C_ROPENREQUEST)) {
+ (ch->flags & XPC_C_ROPENREQUEST)) {
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
return;
}
DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
- XPC_C_OPENREQUEST)));
+ XPC_C_OPENREQUEST)));
DBUG_ON(ch->flags & (XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
- XPC_C_OPENREPLY | XPC_C_CONNECTED));
+ XPC_C_OPENREPLY | XPC_C_CONNECTED));
/*
* The meaningful OPENREQUEST connection state fields are:
ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
ch->remote_nentries = args->local_nentries;
-
if (ch->flags & XPC_C_OPENREQUEST) {
if (args->msg_size != ch->msg_size) {
XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
- &irq_flags);
+ &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
xpc_process_connect(ch, &irq_flags);
}
-
if (IPI_flags & XPC_IPI_OPENREPLY) {
dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, "
}
if (!(ch->flags & XPC_C_OPENREQUEST)) {
XPC_DISCONNECT_CHANNEL(ch, xpcOpenCloseError,
- &irq_flags);
+ &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
/*
* The meaningful OPENREPLY connection state fields are:
* local_msgqueue_pa = physical address of remote
- * partition's local_msgqueue
+ * partition's local_msgqueue
* local_nentries = remote partition's local_nentries
* remote_nentries = remote partition's remote_nentries
*/
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
-
/*
* Attempt to establish a channel connection to a remote partition.
*/
unsigned long irq_flags;
struct xpc_registration *registration = &xpc_registrations[ch->number];
-
- if (mutex_trylock(®istration->mutex) == 0) {
+ if (mutex_trylock(®istration->mutex) == 0)
return xpcRetry;
- }
if (!XPC_CHANNEL_REGISTERED(ch->number)) {
mutex_unlock(®istration->mutex);
return ch->reason;
}
-
/* add info from the channel connect registration to the channel */
ch->kthreads_assigned_limit = registration->assigned_limit;
*/
mutex_unlock(®istration->mutex);
XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
- &irq_flags);
+ &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return xpcUnequalMsgSizes;
}
mutex_unlock(®istration->mutex);
-
/* initiate the connection */
ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
return xpcSuccess;
}
-
/*
* Clear some of the msg flags in the local message queue.
*/
struct xpc_msg *msg;
s64 get;
-
get = ch->w_remote_GP.get;
do {
- msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
- (get % ch->local_nentries) * ch->msg_size);
+ msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ (get % ch->local_nentries) *
+ ch->msg_size);
msg->flags = 0;
- } while (++get < (volatile s64) ch->remote_GP.get);
+ } while (++get < ch->remote_GP.get);
}
-
/*
* Clear some of the msg flags in the remote message queue.
*/
struct xpc_msg *msg;
s64 put;
-
put = ch->w_remote_GP.put;
do {
- msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
- (put % ch->remote_nentries) * ch->msg_size);
+ msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+ (put % ch->remote_nentries) *
+ ch->msg_size);
msg->flags = 0;
- } while (++put < (volatile s64) ch->remote_GP.put);
+ } while (++put < ch->remote_GP.put);
}
-
static void
xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
{
struct xpc_channel *ch = &part->channels[ch_number];
int nmsgs_sent;
-
ch->remote_GP = part->remote_GPs[ch_number];
-
/* See what, if anything, has changed for each connected channel */
xpc_msgqueue_ref(ch);
if (ch->w_remote_GP.get == ch->remote_GP.get &&
- ch->w_remote_GP.put == ch->remote_GP.put) {
+ ch->w_remote_GP.put == ch->remote_GP.put) {
/* nothing changed since GPs were last pulled */
xpc_msgqueue_deref(ch);
return;
}
- if (!(ch->flags & XPC_C_CONNECTED)){
+ if (!(ch->flags & XPC_C_CONNECTED)) {
xpc_msgqueue_deref(ch);
return;
}
-
/*
* First check to see if messages recently sent by us have been
* received by the other side. (The remote GET value will have
* received and delivered by the other side.
*/
xpc_notify_senders(ch, xpcMsgDelivered,
- ch->remote_GP.get);
+ ch->remote_GP.get);
}
/*
* If anyone was waiting for message queue entries to become
* available, wake them up.
*/
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
wake_up(&ch->msg_allocate_wq);
- }
}
-
/*
* Now check for newly sent messages by the other side. (The remote
* PUT value will have changed since we last looked at it.)
"delivered=%d, partid=%d, channel=%d\n",
nmsgs_sent, ch->partid, ch->number);
- if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
+ if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
xpc_activate_kthreads(ch, nmsgs_sent);
- }
}
}
xpc_msgqueue_deref(ch);
}
-
void
xpc_process_channel_activity(struct xpc_partition *part)
{
int ch_number;
u32 ch_flags;
-
IPI_amo = xpc_get_IPI_flags(part);
/*
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
-
/*
* Process any open or close related IPI 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)) {
+ if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags))
xpc_process_openclose_IPI(part, ch_number, IPI_flags);
- }
ch_flags = ch->flags; /* need an atomic snapshot of flags */
continue;
}
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_DEACTIVATING)
continue;
- }
if (!(ch_flags & XPC_C_CONNECTED)) {
if (!(ch_flags & XPC_C_OPENREQUEST)) {
DBUG_ON(ch_flags & XPC_C_SETUP);
- (void) xpc_connect_channel(ch);
+ (void)xpc_connect_channel(ch);
} else {
spin_lock_irqsave(&ch->lock, irq_flags);
xpc_process_connect(ch, &irq_flags);
continue;
}
-
/*
* Process any message related IPI 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)) {
+ if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags))
xpc_process_msg_IPI(part, ch_number);
- }
}
}
-
/*
* XPC's heartbeat code calls this function to inform XPC that a partition is
* going down. XPC responds by tearing down the XPartition Communication
int ch_number;
struct xpc_channel *ch;
-
dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
XPC_PARTID(part), reason);
return;
}
-
/* disconnect channels associated with the partition going down */
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
xpc_part_deref(part);
}
-
/*
* Teardown the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
{
partid_t partid = XPC_PARTID(part);
-
/*
* We start off by making this partition inaccessible to local
* processes by marking it as no longer setup. Then we make it
xpc_vars_part[partid].magic = 0;
-
- free_irq(SGI_XPC_NOTIFY, (void *) (u64) partid);
-
+ free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
/*
* Before proceeding with the teardown we have to wait until all
*/
wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
-
/* now we can begin tearing down the infrastructure */
part->setup_state = XPC_P_TORNDOWN;
part->local_IPI_amo_va = NULL;
}
-
/*
* Called by XP at the time of channel connection registration to cause
* XPC to establish connections to all currently active partitions.
struct xpc_partition *part;
struct xpc_channel *ch;
-
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
}
}
-
void
xpc_connected_callout(struct xpc_channel *ch)
{
"partid=%d, channel=%d\n", ch->partid, ch->number);
ch->func(xpcConnected, ch->partid, ch->number,
- (void *) (u64) ch->local_nentries, ch->key);
+ (void *)(u64)ch->local_nentries, ch->key);
dev_dbg(xpc_chan, "ch->func() returned, reason=xpcConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
}
}
-
/*
* Called by XP at the time of channel connection unregistration to cause
* XPC to teardown all current connections for the specified channel.
struct xpc_partition *part;
struct xpc_channel *ch;
-
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
/* initiate the channel disconnect for every active partition */
ch->flags |= XPC_C_WDISCONNECT;
XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
- &irq_flags);
+ &irq_flags);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
xpc_disconnect_wait(ch_number);
}
-
/*
* To disconnect a channel, and reflect it back to all who may be waiting.
*
*/
void
xpc_disconnect_channel(const int line, struct xpc_channel *ch,
- enum xpc_retval reason, unsigned long *irq_flags)
+ enum xpc_retval reason, unsigned long *irq_flags)
{
u32 channel_was_connected = (ch->flags & XPC_C_CONNECTED);
-
DBUG_ON(!spin_is_locked(&ch->lock));
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
+ if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
return;
- }
+
DBUG_ON(!(ch->flags & (XPC_C_CONNECTING | XPC_C_CONNECTED)));
dev_dbg(xpc_chan, "reason=%d, line=%d, partid=%d, channel=%d\n",
ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
/* some of these may not have been set */
ch->flags &= ~(XPC_C_OPENREQUEST | XPC_C_OPENREPLY |
- XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
- XPC_C_CONNECTING | XPC_C_CONNECTED);
+ XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
+ XPC_C_CONNECTING | XPC_C_CONNECTED);
xpc_IPI_send_closerequest(ch, irq_flags);
- if (channel_was_connected) {
+ if (channel_was_connected)
ch->flags |= XPC_C_WASCONNECTED;
- }
spin_unlock_irqrestore(&ch->lock, *irq_flags);
wake_up_all(&ch->idle_wq);
} else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
+ !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
/* start a kthread that will do the xpcDisconnecting callout */
xpc_create_kthreads(ch, 1, 1);
}
/* wake those waiting to allocate an entry from the local msg queue */
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
wake_up(&ch->msg_allocate_wq);
- }
spin_lock_irqsave(&ch->lock, *irq_flags);
}
-
void
xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
{
}
}
-
/*
* Wait for a message entry to become available for the specified channel,
* but don't wait any longer than 1 jiffy.
{
enum xpc_retval ret;
-
if (ch->flags & XPC_C_DISCONNECTING) {
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpcInterrupted);
return ch->reason;
}
if (ch->flags & XPC_C_DISCONNECTING) {
ret = ch->reason;
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpcInterrupted);
} else if (ret == 0) {
ret = xpcTimeout;
} else {
return ret;
}
-
/*
* Allocate an entry for a message from the message queue associated with the
* specified channel.
*/
static enum xpc_retval
xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
- struct xpc_msg **address_of_msg)
+ struct xpc_msg **address_of_msg)
{
struct xpc_msg *msg;
enum xpc_retval ret;
s64 put;
-
/* this reference will be dropped in xpc_send_msg() */
xpc_msgqueue_ref(ch);
return xpcNotConnected;
}
-
/*
* Get the next available message entry from the local message queue.
* If none are available, we'll make sure that we grab the latest
while (1) {
- put = (volatile s64) ch->w_local_GP.put;
- if (put - (volatile s64) ch->w_remote_GP.get <
- ch->local_nentries) {
+ put = ch->w_local_GP.put;
+ rmb(); /* guarantee that .put loads before .get */
+ if (put - ch->w_remote_GP.get < ch->local_nentries) {
/* There are available message entries. We need to try
* to secure one for ourselves. We'll do this by trying
* to increment w_local_GP.put as long as someone else
* doesn't beat us to it. If they do, we'll have to
* try again.
- */
- if (cmpxchg(&ch->w_local_GP.put, put, put + 1) ==
- put) {
+ */
+ if (cmpxchg(&ch->w_local_GP.put, put, put + 1) == put) {
/* we got the entry referenced by put */
break;
}
continue; /* try again */
}
-
/*
* There aren't any available msg entries at this time.
*
* that will cause the IPI handler to fetch the latest
* GP values as if an IPI was sent by the other side.
*/
- if (ret == xpcTimeout) {
+ if (ret == xpcTimeout)
xpc_IPI_send_local_msgrequest(ch);
- }
if (flags & XPC_NOWAIT) {
xpc_msgqueue_deref(ch);
}
}
-
/* get the message's address and initialize it */
- msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
- (put % ch->local_nentries) * ch->msg_size);
-
+ msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ (put % ch->local_nentries) * ch->msg_size);
DBUG_ON(msg->flags != 0);
msg->number = put;
dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n", put + 1,
- (void *) msg, msg->number, ch->partid, ch->number);
+ (void *)msg, msg->number, ch->partid, ch->number);
*address_of_msg = msg;
return xpcSuccess;
}
-
/*
* Allocate an entry for a message from the message queue associated with the
* specified channel. NOTE that this routine can sleep waiting for a message
enum xpc_retval ret = xpcUnknownReason;
struct xpc_msg *msg = NULL;
-
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ret = xpc_allocate_msg(&part->channels[ch_number], flags, &msg);
xpc_part_deref(part);
- if (msg != NULL) {
+ if (msg != NULL)
*payload = &msg->payload;
- }
}
return ret;
}
-
/*
* 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
s64 put = initial_put + 1;
int send_IPI = 0;
-
while (1) {
while (1) {
- if (put == (volatile s64) ch->w_local_GP.put) {
+ if (put == ch->w_local_GP.put)
break;
- }
- msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
- (put % ch->local_nentries) * ch->msg_size);
+ msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ (put % ch->local_nentries) *
+ ch->msg_size);
- if (!(msg->flags & XPC_M_READY)) {
+ if (!(msg->flags & XPC_M_READY))
break;
- }
put++;
}
}
if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
- initial_put) {
+ initial_put) {
/* someone else beat us to it */
- DBUG_ON((volatile s64) ch->local_GP->put < initial_put);
+ DBUG_ON(ch->local_GP->put < initial_put);
break;
}
initial_put = put;
}
- if (send_IPI) {
+ if (send_IPI)
xpc_IPI_send_msgrequest(ch);
- }
}
-
/*
* 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
*/
static enum xpc_retval
xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
- xpc_notify_func func, void *key)
+ xpc_notify_func func, void *key)
{
enum xpc_retval ret = xpcSuccess;
struct xpc_notify *notify = notify;
s64 put, msg_number = msg->number;
-
DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
- DBUG_ON((((u64) msg - (u64) ch->local_msgqueue) / ch->msg_size) !=
- msg_number % ch->local_nentries);
+ DBUG_ON((((u64)msg - (u64)ch->local_msgqueue) / ch->msg_size) !=
+ msg_number % ch->local_nentries);
DBUG_ON(msg->flags & XPC_M_READY);
if (ch->flags & XPC_C_DISCONNECTING) {
notify->key = key;
notify->type = notify_type;
- // >>> is a mb() needed here?
+ /* >>> is a mb() needed here? */
if (ch->flags & XPC_C_DISCONNECTING) {
/*
* the notify entry.
*/
if (cmpxchg(¬ify->type, notify_type, 0) ==
- notify_type) {
+ notify_type) {
atomic_dec(&ch->n_to_notify);
ret = ch->reason;
}
/* see if the message is next in line to be sent, if so send it */
put = ch->local_GP->put;
- if (put == msg_number) {
+ if (put == msg_number)
xpc_send_msgs(ch, put);
- }
/* drop the reference grabbed in xpc_allocate_msg() */
xpc_msgqueue_deref(ch);
return ret;
}
-
/*
* Send a message previously allocated using xpc_initiate_allocate() on the
* specified channel connected to the specified partition.
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
enum xpc_retval ret;
-
- dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+ dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
return ret;
}
-
/*
* Send a message previously allocated using xpc_initiate_allocate on the
* specified channel connected to the specified partition.
*/
enum xpc_retval
xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
- xpc_notify_func func, void *key)
+ xpc_notify_func func, void *key)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
enum xpc_retval ret;
-
- dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+ dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
partid, ch_number);
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(func == NULL);
ret = xpc_send_msg(&part->channels[ch_number], msg, XPC_N_CALL,
- func, key);
+ func, key);
return ret;
}
-
static struct xpc_msg *
xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
{
u64 msg_offset;
enum xpc_retval ret;
-
if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
/* we were interrupted by a signal */
return NULL;
msg_index = ch->next_msg_to_pull % ch->remote_nentries;
- DBUG_ON(ch->next_msg_to_pull >=
- (volatile s64) ch->w_remote_GP.put);
- nmsgs = (volatile s64) ch->w_remote_GP.put -
- ch->next_msg_to_pull;
+ DBUG_ON(ch->next_msg_to_pull >= ch->w_remote_GP.put);
+ nmsgs = ch->w_remote_GP.put - ch->next_msg_to_pull;
if (msg_index + nmsgs > ch->remote_nentries) {
/* ignore the ones that wrap the msg queue for now */
nmsgs = ch->remote_nentries - msg_index;
}
msg_offset = msg_index * ch->msg_size;
- msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
- msg_offset);
- remote_msg = (struct xpc_msg *) (ch->remote_msgqueue_pa +
- msg_offset);
+ msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
+ remote_msg = (struct xpc_msg *)(ch->remote_msgqueue_pa +
+ msg_offset);
- if ((ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
- nmsgs * ch->msg_size)) != xpcSuccess) {
+ ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
+ nmsgs * ch->msg_size);
+ if (ret != xpcSuccess) {
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
" msg %ld from partition %d, channel=%d, "
return NULL;
}
- mb(); /* >>> this may not be needed, we're not sure */
-
ch->next_msg_to_pull += nmsgs;
}
/* return the message we were looking for */
msg_offset = (get % ch->remote_nentries) * ch->msg_size;
- msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue + msg_offset);
+ msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
return msg;
}
-
/*
* Get a message to be delivered.
*/
struct xpc_msg *msg = NULL;
s64 get;
-
do {
- if ((volatile u32) ch->flags & XPC_C_DISCONNECTING) {
+ if (ch->flags & XPC_C_DISCONNECTING)
break;
- }
- get = (volatile s64) ch->w_local_GP.get;
- if (get == (volatile s64) ch->w_remote_GP.put) {
+ get = ch->w_local_GP.get;
+ rmb(); /* guarantee that .get loads before .put */
+ if (get == ch->w_remote_GP.put)
break;
- }
/* There are messages waiting to be pulled and delivered.
* We need to try to secure one for ourselves. We'll do this
* by trying to increment w_local_GP.get and hope that no one
* else beats us to it. If they do, we'll we'll simply have
* to try again for the next one.
- */
+ */
if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
/* we got the entry referenced by get */
return msg;
}
-
/*
* Deliver a message to its intended recipient.
*/
{
struct xpc_msg *msg;
-
- if ((msg = xpc_get_deliverable_msg(ch)) != NULL) {
+ msg = xpc_get_deliverable_msg(ch);
+ if (msg != NULL) {
/*
* This ref is taken to protect the payload itself from being
if (ch->func != NULL) {
dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg->number, ch->partid,
+ (void *)msg, msg->number, ch->partid,
ch->number);
/* deliver the message to its intended recipient */
ch->func(xpcMsgReceived, ch->partid, ch->number,
- &msg->payload, ch->key);
+ &msg->payload, ch->key);
dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
"msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg->number, ch->partid,
+ (void *)msg, msg->number, ch->partid,
ch->number);
}
}
}
-
/*
* 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
s64 get = initial_get + 1;
int send_IPI = 0;
-
while (1) {
while (1) {
- if (get == (volatile s64) ch->w_local_GP.get) {
+ if (get == ch->w_local_GP.get)
break;
- }
- msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
- (get % ch->remote_nentries) * ch->msg_size);
+ msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+ (get % ch->remote_nentries) *
+ ch->msg_size);
- if (!(msg->flags & XPC_M_DONE)) {
+ if (!(msg->flags & XPC_M_DONE))
break;
- }
msg_flags |= msg->flags;
get++;
}
if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
- initial_get) {
+ initial_get) {
/* someone else beat us to it */
- DBUG_ON((volatile s64) ch->local_GP->get <=
- initial_get);
+ DBUG_ON(ch->local_GP->get <= initial_get);
break;
}
initial_get = get;
}
- if (send_IPI) {
+ if (send_IPI)
xpc_IPI_send_msgrequest(ch);
- }
}
-
/*
* Acknowledge receipt of a delivered message.
*
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
s64 get, msg_number = msg->number;
-
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ch = &part->channels[ch_number];
dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg_number, ch->partid, ch->number);
+ (void *)msg, msg_number, ch->partid, ch->number);
- DBUG_ON((((u64) msg - (u64) ch->remote_msgqueue) / ch->msg_size) !=
- msg_number % ch->remote_nentries);
+ DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->msg_size) !=
+ msg_number % ch->remote_nentries);
DBUG_ON(msg->flags & XPC_M_DONE);
msg->flags |= XPC_M_DONE;
* been delivered.
*/
get = ch->local_GP->get;
- if (get == msg_number) {
+ if (get == msg_number)
xpc_acknowledge_msgs(ch, get, msg->flags);
- }
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg() */
xpc_msgqueue_deref(ch);
}
-
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* Cross Partition Communication (XPC) support - standard version.
*
*
*/
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
#include <linux/cache.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/completion.h>
#include <linux/kdebug.h>
+#include <linux/kthread.h>
+#include <linux/uaccess.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
-#include <asm/uaccess.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
/* define two XPC debug device structures to be used with dev_dbg() et al */
struct device *xpc_part = &xpc_part_dbg_subname;
struct device *xpc_chan = &xpc_chan_dbg_subname;
-
static int xpc_kdebug_ignore;
-
/* systune related variables for /proc/sys directories */
static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
static int xpc_hb_check_max_interval = 120;
int xpc_disengage_request_timelimit = XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT;
-static int xpc_disengage_request_min_timelimit = 0;
+static int xpc_disengage_request_min_timelimit; /* = 0 */
static int xpc_disengage_request_max_timelimit = 120;
static ctl_table xpc_sys_xpc_hb_dir[] = {
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "hb_interval",
- .data = &xpc_hb_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_minmax,
- .strategy = &sysctl_intvec,
- .extra1 = &xpc_hb_min_interval,
- .extra2 = &xpc_hb_max_interval
- },
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "hb_interval",
+ .data = &xpc_hb_interval,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &xpc_hb_min_interval,
+ .extra2 = &xpc_hb_max_interval},
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "hb_check_interval",
- .data = &xpc_hb_check_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_minmax,
- .strategy = &sysctl_intvec,
- .extra1 = &xpc_hb_check_min_interval,
- .extra2 = &xpc_hb_check_max_interval
- },
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "hb_check_interval",
+ .data = &xpc_hb_check_interval,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &xpc_hb_check_min_interval,
+ .extra2 = &xpc_hb_check_max_interval},
{}
};
static ctl_table xpc_sys_xpc_dir[] = {
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "hb",
- .mode = 0555,
- .child = xpc_sys_xpc_hb_dir
- },
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "hb",
+ .mode = 0555,
+ .child = xpc_sys_xpc_hb_dir},
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "disengage_request_timelimit",
- .data = &xpc_disengage_request_timelimit,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_minmax,
- .strategy = &sysctl_intvec,
- .extra1 = &xpc_disengage_request_min_timelimit,
- .extra2 = &xpc_disengage_request_max_timelimit
- },
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "disengage_request_timelimit",
+ .data = &xpc_disengage_request_timelimit,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &xpc_disengage_request_min_timelimit,
+ .extra2 = &xpc_disengage_request_max_timelimit},
{}
};
static ctl_table xpc_sys_dir[] = {
{
- .ctl_name = CTL_UNNUMBERED,
- .procname = "xpc",
- .mode = 0555,
- .child = xpc_sys_xpc_dir
- },
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "xpc",
+ .mode = 0555,
+ .child = xpc_sys_xpc_dir},
{}
};
static struct ctl_table_header *xpc_sysctl;
/* notification that the xpc_discovery thread has exited */
static DECLARE_COMPLETION(xpc_discovery_exited);
-
static struct timer_list xpc_hb_timer;
-
static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
-
static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
static struct notifier_block xpc_reboot_notifier = {
.notifier_call = xpc_system_reboot,
.notifier_call = xpc_system_die,
};
-
/*
* Timer function to enforce the timelimit on the partition disengage request.
*/
static void
xpc_timeout_partition_disengage_request(unsigned long data)
{
- struct xpc_partition *part = (struct xpc_partition *) data;
-
+ struct xpc_partition *part = (struct xpc_partition *)data;
DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
- (void) xpc_partition_disengaged(part);
+ (void)xpc_partition_disengaged(part);
DBUG_ON(part->disengage_request_timeout != 0);
DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
}
-
/*
* Notify the heartbeat check thread that an IRQ has been received.
*/
return IRQ_HANDLED;
}
-
/*
* Timer to produce the heartbeat. The timer structures function is
* already set when this is initially called. A tunable is used to
{
xpc_vars->heartbeat++;
- if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
+ if (time_after_eq(jiffies, xpc_hb_check_timeout))
wake_up_interruptible(&xpc_act_IRQ_wq);
- }
xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
add_timer(&xpc_hb_timer);
}
-
/*
* This thread is responsible for nearly all of the partition
* activation/deactivation.
{
int last_IRQ_count = 0;
int new_IRQ_count;
- int force_IRQ=0;
-
+ int force_IRQ = 0;
/* this thread was marked active by xpc_hb_init() */
- daemonize(XPC_HB_CHECK_THREAD_NAME);
-
set_cpus_allowed(current, cpumask_of_cpu(XPC_HB_CHECK_CPU));
/* set our heartbeating to other partitions into motion */
xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
xpc_hb_beater(0);
- while (!(volatile int) xpc_exiting) {
+ while (!xpc_exiting) {
dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
"been received\n",
- (int) (xpc_hb_check_timeout - jiffies),
+ (int)(xpc_hb_check_timeout - jiffies),
atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
-
/* checking of remote heartbeats is skewed by IRQ handling */
if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
dev_dbg(xpc_part, "checking remote heartbeats\n");
force_IRQ = 1;
}
-
/* check for outstanding IRQs */
new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
last_IRQ_count += xpc_identify_act_IRQ_sender();
if (last_IRQ_count < new_IRQ_count) {
/* retry once to help avoid missing AMO */
- (void) xpc_identify_act_IRQ_sender();
+ (void)xpc_identify_act_IRQ_sender();
}
last_IRQ_count = new_IRQ_count;
xpc_hb_check_timeout = jiffies +
- (xpc_hb_check_interval * HZ);
+ (xpc_hb_check_interval * HZ);
}
/* wait for IRQ or timeout */
- (void) wait_event_interruptible(xpc_act_IRQ_wq,
- (last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
- time_after_eq(jiffies, xpc_hb_check_timeout) ||
- (volatile int) xpc_exiting));
+ (void)wait_event_interruptible(xpc_act_IRQ_wq,
+ (last_IRQ_count <
+ atomic_read(&xpc_act_IRQ_rcvd)
+ || time_after_eq(jiffies,
+ xpc_hb_check_timeout) ||
+ xpc_exiting));
}
dev_dbg(xpc_part, "heartbeat checker is exiting\n");
-
/* mark this thread as having exited */
complete(&xpc_hb_checker_exited);
return 0;
}
-
/*
* This thread will attempt to discover other partitions to activate
* based on info provided by SAL. This new thread is short lived and
static int
xpc_initiate_discovery(void *ignore)
{
- daemonize(XPC_DISCOVERY_THREAD_NAME);
-
xpc_discovery();
dev_dbg(xpc_part, "discovery thread is exiting\n");
return 0;
}
-
/*
* Establish first contact with the remote partititon. This involves pulling
* the XPC per partition variables from the remote partition and waiting for
{
enum xpc_retval ret;
-
while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
if (ret != xpcRetry) {
XPC_DEACTIVATE_PARTITION(part, ret);
"partition %d\n", XPC_PARTID(part));
/* wait a 1/4 of a second or so */
- (void) msleep_interruptible(250);
+ (void)msleep_interruptible(250);
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_DEACTIVATING)
return part->reason;
- }
}
return xpc_mark_partition_active(part);
}
-
/*
* The first kthread assigned to a newly activated partition is the one
* created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
xpc_channel_mgr(struct xpc_partition *part)
{
while (part->act_state != XPC_P_DEACTIVATING ||
- atomic_read(&part->nchannels_active) > 0 ||
- !xpc_partition_disengaged(part)) {
+ atomic_read(&part->nchannels_active) > 0 ||
+ !xpc_partition_disengaged(part)) {
xpc_process_channel_activity(part);
-
/*
* Wait until we've been requested to activate kthreads or
* all of the channel's message queues have been torn down or
* wake him up.
*/
atomic_dec(&part->channel_mgr_requests);
- (void) wait_event_interruptible(part->channel_mgr_wq,
+ (void)wait_event_interruptible(part->channel_mgr_wq,
(atomic_read(&part->channel_mgr_requests) > 0 ||
- (volatile u64) part->local_IPI_amo != 0 ||
- ((volatile u8) part->act_state ==
- XPC_P_DEACTIVATING &&
- atomic_read(&part->nchannels_active) == 0 &&
- xpc_partition_disengaged(part))));
+ part->local_IPI_amo != 0 ||
+ (part->act_state == XPC_P_DEACTIVATING &&
+ atomic_read(&part->nchannels_active) == 0 &&
+ xpc_partition_disengaged(part))));
atomic_set(&part->channel_mgr_requests, 1);
-
- // >>> Does it need to wakeup periodically as well? In case we
- // >>> miscalculated the #of kthreads to wakeup or create?
}
}
-
/*
* When XPC HB determines that a partition has come up, it will create a new
* kthread and that kthread will call this function to attempt to set up the
dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));
- if (xpc_setup_infrastructure(part) != xpcSuccess) {
+ if (xpc_setup_infrastructure(part) != xpcSuccess)
return;
- }
/*
* The kthread that XPC HB called us with will become the
* has been dismantled.
*/
- (void) xpc_part_ref(part); /* this will always succeed */
+ (void)xpc_part_ref(part); /* this will always succeed */
- if (xpc_make_first_contact(part) == xpcSuccess) {
+ if (xpc_make_first_contact(part) == xpcSuccess)
xpc_channel_mgr(part);
- }
xpc_part_deref(part);
xpc_teardown_infrastructure(part);
}
-
static int
xpc_activating(void *__partid)
{
- partid_t partid = (u64) __partid;
+ partid_t partid = (u64)__partid;
struct xpc_partition *part = &xpc_partitions[partid];
unsigned long irq_flags;
- struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
- int ret;
-
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
dev_dbg(xpc_part, "bringing partition %d up\n", partid);
- daemonize("xpc%02d", partid);
-
- /*
- * This thread needs to run at a realtime priority to prevent a
- * significant performance degradation.
- */
- ret = sched_setscheduler(current, SCHED_FIFO, ¶m);
- if (ret != 0) {
- dev_warn(xpc_part, "unable to set pid %d to a realtime "
- "priority, ret=%d\n", current->pid, ret);
- }
-
- /* allow this thread and its children to run on any CPU */
- set_cpus_allowed(current, CPU_MASK_ALL);
-
/*
* Register the remote partition's AMOs with SAL so it can handle
* and cleanup errors within that address range should the remote
* reloads and system reboots.
*/
if (sn_register_xp_addr_region(part->remote_amos_page_pa,
- PAGE_SIZE, 1) < 0) {
+ PAGE_SIZE, 1) < 0) {
dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
- "xp_addr region\n", partid);
+ "xp_addr region\n", partid);
spin_lock_irqsave(&part->act_lock, irq_flags);
part->act_state = XPC_P_INACTIVE;
xpc_allow_hb(partid, xpc_vars);
xpc_IPI_send_activated(part);
-
/*
* xpc_partition_up() holds this thread and marks this partition as
* XPC_P_ACTIVE by calling xpc_hb_mark_active().
*/
- (void) xpc_partition_up(part);
+ (void)xpc_partition_up(part);
xpc_disallow_hb(partid, xpc_vars);
xpc_mark_partition_inactive(part);
return 0;
}
-
void
xpc_activate_partition(struct xpc_partition *part)
{
partid_t partid = XPC_PARTID(part);
unsigned long irq_flags;
- pid_t pid;
-
+ struct task_struct *kthread;
spin_lock_irqsave(&part->act_lock, irq_flags);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
- pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
-
- if (unlikely(pid <= 0)) {
+ kthread = kthread_run(xpc_activating, (void *)((u64)partid), "xpc%02d",
+ partid);
+ if (IS_ERR(kthread)) {
spin_lock_irqsave(&part->act_lock, irq_flags);
part->act_state = XPC_P_INACTIVE;
XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
}
}
-
/*
* 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 IPI 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
irqreturn_t
xpc_notify_IRQ_handler(int irq, void *dev_id)
{
- partid_t partid = (partid_t) (u64) dev_id;
+ partid_t partid = (partid_t) (u64)dev_id;
struct xpc_partition *part = &xpc_partitions[partid];
-
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
if (xpc_part_ref(part)) {
return IRQ_HANDLED;
}
-
/*
* Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
* because the write to their associated IPI amo completed after the IRQ/IPI
xpc_check_for_channel_activity(part);
part->dropped_IPI_timer.expires = jiffies +
- XPC_P_DROPPED_IPI_WAIT;
+ XPC_P_DROPPED_IPI_WAIT;
add_timer(&part->dropped_IPI_timer);
xpc_part_deref(part);
}
}
-
void
xpc_activate_kthreads(struct xpc_channel *ch, int needed)
{
int assigned = atomic_read(&ch->kthreads_assigned);
int wakeup;
-
DBUG_ON(needed <= 0);
if (idle > 0) {
wake_up_nr(&ch->idle_wq, wakeup);
}
- if (needed <= 0) {
+ if (needed <= 0)
return;
- }
if (needed + assigned > ch->kthreads_assigned_limit) {
needed = ch->kthreads_assigned_limit - assigned;
- // >>>should never be less than 0
- if (needed <= 0) {
+ if (needed <= 0)
return;
- }
}
dev_dbg(xpc_chan, "create %d new kthreads, partid=%d, channel=%d\n",
xpc_create_kthreads(ch, needed, 0);
}
-
/*
* This function is where XPC's kthreads wait for messages to deliver.
*/
do {
/* deliver messages to their intended recipients */
- while ((volatile s64) ch->w_local_GP.get <
- (volatile s64) ch->w_remote_GP.put &&
- !((volatile u32) ch->flags &
- XPC_C_DISCONNECTING)) {
+ while (ch->w_local_GP.get < ch->w_remote_GP.put &&
+ !(ch->flags & XPC_C_DISCONNECTING)) {
xpc_deliver_msg(ch);
}
if (atomic_inc_return(&ch->kthreads_idle) >
- ch->kthreads_idle_limit) {
+ ch->kthreads_idle_limit) {
/* too many idle kthreads on this channel */
atomic_dec(&ch->kthreads_idle);
break;
dev_dbg(xpc_chan, "idle kthread calling "
"wait_event_interruptible_exclusive()\n");
- (void) wait_event_interruptible_exclusive(ch->idle_wq,
- ((volatile s64) ch->w_local_GP.get <
- (volatile s64) ch->w_remote_GP.put ||
- ((volatile u32) ch->flags &
- XPC_C_DISCONNECTING)));
+ (void)wait_event_interruptible_exclusive(ch->idle_wq,
+ (ch->w_local_GP.get < ch->w_remote_GP.put ||
+ (ch->flags & XPC_C_DISCONNECTING)));
atomic_dec(&ch->kthreads_idle);
- } while (!((volatile u32) ch->flags & XPC_C_DISCONNECTING));
+ } while (!(ch->flags & XPC_C_DISCONNECTING));
}
-
static int
-xpc_daemonize_kthread(void *args)
+xpc_kthread_start(void *args)
{
partid_t partid = XPC_UNPACK_ARG1(args);
u16 ch_number = XPC_UNPACK_ARG2(args);
int n_needed;
unsigned long irq_flags;
-
- daemonize("xpc%02dc%d", partid, ch_number);
-
dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
partid, ch_number);
* need one less than total #of messages to deliver.
*/
n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
- if (n_needed > 0 &&
- !(ch->flags & XPC_C_DISCONNECTING)) {
+ if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING))
xpc_activate_kthreads(ch, n_needed);
- }
+
} else {
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
spin_lock_irqsave(&ch->lock, irq_flags);
if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
+ !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
spin_unlock_irqrestore(&ch->lock, irq_flags);
return 0;
}
-
/*
* For each partition that XPC has established communications with, there is
* a minimum of one kernel thread assigned to perform any operation that
*/
void
xpc_create_kthreads(struct xpc_channel *ch, int needed,
- int ignore_disconnecting)
+ int ignore_disconnecting)
{
unsigned long irq_flags;
- pid_t pid;
u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
struct xpc_partition *part = &xpc_partitions[ch->partid];
-
+ struct task_struct *kthread;
while (needed-- > 0) {
if (!atomic_inc_not_zero(&ch->kthreads_assigned)) {
/* kthreads assigned had gone to zero */
BUG_ON(!(ch->flags &
- XPC_C_DISCONNECTINGCALLOUT_MADE));
+ XPC_C_DISCONNECTINGCALLOUT_MADE));
break;
}
if (atomic_inc_return(&part->nchannels_engaged) == 1)
xpc_mark_partition_engaged(part);
}
- (void) xpc_part_ref(part);
+ (void)xpc_part_ref(part);
xpc_msgqueue_ref(ch);
- pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
- if (pid < 0) {
+ kthread = kthread_run(xpc_kthread_start, (void *)args,
+ "xpc%02dc%d", ch->partid, ch->number);
+ if (IS_ERR(kthread)) {
/* the fork failed */
/*
* to this channel are blocked in the channel's
* registerer, because the only thing that will unblock
* them is the xpcDisconnecting callout that this
- * failed kernel_thread would have made.
+ * failed kthread_run() would have made.
*/
if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
xpc_part_deref(part);
if (atomic_read(&ch->kthreads_assigned) <
- ch->kthreads_idle_limit) {
+ ch->kthreads_idle_limit) {
/*
* Flag this as an error only if we have an
* insufficient #of kthreads for the channel
*/
spin_lock_irqsave(&ch->lock, irq_flags);
XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
- &irq_flags);
+ &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
break;
}
-
- ch->kthreads_created++; // >>> temporary debug only!!!
}
}
-
void
xpc_disconnect_wait(int ch_number)
{
struct xpc_channel *ch;
int wakeup_channel_mgr;
-
/* now wait for all callouts to the caller's function to cease */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
- if (!xpc_part_ref(part)) {
+ if (!xpc_part_ref(part))
continue;
- }
ch = &part->channels[ch_number];
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);
+ ch->number,
+ ch->delayed_IPI_flags);
spin_unlock(&part->IPI_lock);
wakeup_channel_mgr = 1;
}
ch->flags &= ~XPC_C_WDISCONNECT;
spin_unlock_irqrestore(&ch->lock, irq_flags);
- if (wakeup_channel_mgr) {
+ if (wakeup_channel_mgr)
xpc_wakeup_channel_mgr(part);
- }
xpc_part_deref(part);
}
}
-
static void
xpc_do_exit(enum xpc_retval reason)
{
struct xpc_partition *part;
unsigned long printmsg_time, disengage_request_timeout = 0;
-
/* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
DBUG_ON(xpc_exiting == 1);
/* wait for the heartbeat checker thread to exit */
wait_for_completion(&xpc_hb_checker_exited);
-
/* sleep for a 1/3 of a second or so */
- (void) msleep_interruptible(300);
-
+ (void)msleep_interruptible(300);
/* wait for all partitions to become inactive */
part = &xpc_partitions[partid];
if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_INACTIVE) {
continue;
}
XPC_DEACTIVATE_PARTITION(part, reason);
if (part->disengage_request_timeout >
- disengage_request_timeout) {
+ disengage_request_timeout) {
disengage_request_timeout =
- part->disengage_request_timeout;
+ part->disengage_request_timeout;
}
}
if (xpc_partition_engaged(-1UL)) {
if (time_after(jiffies, printmsg_time)) {
dev_info(xpc_part, "waiting for remote "
- "partitions to disengage, timeout in "
- "%ld seconds\n",
- (disengage_request_timeout - jiffies)
- / HZ);
+ "partitions to disengage, timeout in "
+ "%ld seconds\n",
+ (disengage_request_timeout - jiffies)
+ / HZ);
printmsg_time = jiffies +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
+ (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
printed_waiting_msg = 1;
}
} else if (active_part_count > 0) {
if (printed_waiting_msg) {
dev_info(xpc_part, "waiting for local partition"
- " to disengage\n");
+ " to disengage\n");
printed_waiting_msg = 0;
}
} else {
if (!xpc_disengage_request_timedout) {
dev_info(xpc_part, "all partitions have "
- "disengaged\n");
+ "disengaged\n");
}
break;
}
/* sleep for a 1/3 of a second or so */
- (void) msleep_interruptible(300);
+ (void)msleep_interruptible(300);
} while (1);
DBUG_ON(xpc_partition_engaged(-1UL));
-
/* indicate to others that our reserved page is uninitialized */
xpc_rsvd_page->vars_pa = 0;
if (reason == xpcUnloading) {
/* take ourselves off of the reboot_notifier_list */
- (void) unregister_reboot_notifier(&xpc_reboot_notifier);
+ (void)unregister_reboot_notifier(&xpc_reboot_notifier);
/* take ourselves off of the die_notifier list */
- (void) unregister_die_notifier(&xpc_die_notifier);
+ (void)unregister_die_notifier(&xpc_die_notifier);
}
/* close down protections for IPI operations */
xpc_restrict_IPI_ops();
-
/* clear the interface to XPC's functions */
xpc_clear_interface();
- if (xpc_sysctl) {
+ if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
- }
kfree(xpc_remote_copy_buffer_base);
}
-
/*
* This function is called when the system is being rebooted.
*/
{
enum xpc_retval reason;
-
switch (event) {
case SYS_RESTART:
reason = xpcSystemReboot;
return NOTIFY_DONE;
}
-
/*
* Notify other partitions to disengage from all references to our memory.
*/
unsigned long engaged;
long time, printmsg_time, disengage_request_timeout;
-
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
- xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
+ xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
- remote_vars_version)) {
+ remote_vars_version)) {
/* just in case it was left set by an earlier XPC */
xpc_clear_partition_engaged(1UL << partid);
}
if (xpc_partition_engaged(1UL << partid) ||
- part->act_state != XPC_P_INACTIVE) {
+ part->act_state != XPC_P_INACTIVE) {
xpc_request_partition_disengage(part);
xpc_mark_partition_disengaged(part);
xpc_IPI_send_disengage(part);
time = rtc_time();
printmsg_time = time +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
+ (XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
disengage_request_timeout = time +
- (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
+ (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
/* wait for all other partitions to disengage from us */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
if (engaged & (1UL << partid)) {
dev_info(xpc_part, "disengage from "
- "remote partition %d timed "
- "out\n", partid);
+ "remote partition %d timed "
+ "out\n", partid);
}
}
break;
if (time >= printmsg_time) {
dev_info(xpc_part, "waiting for remote partitions to "
- "disengage, timeout in %ld seconds\n",
- (disengage_request_timeout - time) /
- sn_rtc_cycles_per_second);
+ "disengage, timeout in %ld seconds\n",
+ (disengage_request_timeout - time) /
+ sn_rtc_cycles_per_second);
printmsg_time = time +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL *
- sn_rtc_cycles_per_second);
+ (XPC_DISENGAGE_PRINTMSG_INTERVAL *
+ sn_rtc_cycles_per_second);
}
}
}
-
/*
* This function is called when the system is being restarted or halted due
* to some sort of system failure. If this is the case we need to notify the
case DIE_KDEBUG_ENTER:
/* Should lack of heartbeat be ignored by other partitions? */
- if (!xpc_kdebug_ignore) {
+ if (!xpc_kdebug_ignore)
break;
- }
+
/* fall through */
case DIE_MCA_MONARCH_ENTER:
case DIE_INIT_MONARCH_ENTER:
case DIE_KDEBUG_LEAVE:
/* Is lack of heartbeat being ignored by other partitions? */
- if (!xpc_kdebug_ignore) {
+ if (!xpc_kdebug_ignore)
break;
- }
+
/* fall through */
case DIE_MCA_MONARCH_LEAVE:
case DIE_INIT_MONARCH_LEAVE:
return NOTIFY_DONE;
}
-
int __init
xpc_init(void)
{
int ret;
partid_t partid;
struct xpc_partition *part;
- pid_t pid;
+ struct task_struct *kthread;
size_t buf_size;
-
- if (!ia64_platform_is("sn2")) {
+ if (!ia64_platform_is("sn2"))
return -ENODEV;
- }
-
buf_size = max(XPC_RP_VARS_SIZE,
- XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
+ XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
- GFP_KERNEL, &xpc_remote_copy_buffer_base);
+ GFP_KERNEL,
+ &xpc_remote_copy_buffer_base);
if (xpc_remote_copy_buffer == NULL)
return -ENOMEM;
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
- DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));
+ DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
part->act_IRQ_rcvd = 0;
spin_lock_init(&part->act_lock);
init_timer(&part->disengage_request_timer);
part->disengage_request_timer.function =
- xpc_timeout_partition_disengage_request;
- part->disengage_request_timer.data = (unsigned long) part;
+ xpc_timeout_partition_disengage_request;
+ part->disengage_request_timer.data = (unsigned long)part;
part->setup_state = XPC_P_UNSET;
init_waitqueue_head(&part->teardown_wq);
* but rather immediately process the interrupt.
*/
ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
- "xpc hb", NULL);
+ "xpc hb", NULL);
if (ret != 0) {
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
xpc_restrict_IPI_ops();
- if (xpc_sysctl) {
+ if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
- }
kfree(xpc_remote_copy_buffer_base);
return -EBUSY;
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_restrict_IPI_ops();
- if (xpc_sysctl) {
+ if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
- }
kfree(xpc_remote_copy_buffer_base);
return -EBUSY;
}
-
/* add ourselves to the reboot_notifier_list */
ret = register_reboot_notifier(&xpc_reboot_notifier);
- if (ret != 0) {
+ if (ret != 0)
dev_warn(xpc_part, "can't register reboot notifier\n");
- }
/* add ourselves to the die_notifier list */
ret = register_die_notifier(&xpc_die_notifier);
- if (ret != 0) {
+ if (ret != 0)
dev_warn(xpc_part, "can't register die notifier\n");
- }
init_timer(&xpc_hb_timer);
xpc_hb_timer.function = xpc_hb_beater;
* The real work-horse behind xpc. This processes incoming
* interrupts and monitors remote heartbeats.
*/
- pid = kernel_thread(xpc_hb_checker, NULL, 0);
- if (pid < 0) {
+ kthread = kthread_run(xpc_hb_checker, NULL, XPC_HB_CHECK_THREAD_NAME);
+ if (IS_ERR(kthread)) {
dev_err(xpc_part, "failed while forking hb check thread\n");
/* indicate to others that our reserved page is uninitialized */
xpc_rsvd_page->vars_pa = 0;
/* take ourselves off of the reboot_notifier_list */
- (void) unregister_reboot_notifier(&xpc_reboot_notifier);
+ (void)unregister_reboot_notifier(&xpc_reboot_notifier);
/* take ourselves off of the die_notifier list */
- (void) unregister_die_notifier(&xpc_die_notifier);
+ (void)unregister_die_notifier(&xpc_die_notifier);
del_timer_sync(&xpc_hb_timer);
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_restrict_IPI_ops();
- if (xpc_sysctl) {
+ if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
- }
kfree(xpc_remote_copy_buffer_base);
return -EBUSY;
}
-
/*
* Startup a thread that will attempt to discover other partitions to
* activate based on info provided by SAL. This new thread is short
* lived and will exit once discovery is complete.
*/
- pid = kernel_thread(xpc_initiate_discovery, NULL, 0);
- if (pid < 0) {
+ kthread = kthread_run(xpc_initiate_discovery, NULL,
+ XPC_DISCOVERY_THREAD_NAME);
+ if (IS_ERR(kthread)) {
dev_err(xpc_part, "failed while forking discovery thread\n");
/* mark this new thread as a non-starter */
return -EBUSY;
}
-
/* set the interface to point at XPC's functions */
xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
xpc_initiate_allocate, xpc_initiate_send,
return 0;
}
-module_init(xpc_init);
+module_init(xpc_init);
void __exit
xpc_exit(void)
{
xpc_do_exit(xpcUnloading);
}
-module_exit(xpc_exit);
+module_exit(xpc_exit);
MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
module_param(xpc_hb_interval, int, 0);
MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
- "heartbeat increments.");
+ "heartbeat increments.");
module_param(xpc_hb_check_interval, int, 0);
MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
- "heartbeat checks.");
+ "heartbeat checks.");
module_param(xpc_disengage_request_timelimit, int, 0);
MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
- "for disengage request to complete.");
+ "for disengage request to complete.");
module_param(xpc_kdebug_ignore, int, 0);
MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
- "other partitions when dropping into kdebug.");
-
+ "other partitions when dropping into kdebug.");
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
-
/*
* Cross Partition Communication (XPC) partition support.
*
*
*/
-
#include <linux/kernel.h>
#include <linux/sysctl.h>
#include <linux/cache.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/nodepda.h>
#include <asm/sn/addrs.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
/* XPC is exiting flag */
int xpc_exiting;
-
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access;
static u64 xpc_sh2_IPI_access0;
static u64 xpc_sh2_IPI_access2;
static u64 xpc_sh2_IPI_access3;
-
/* original protection values for each node */
u64 xpc_prot_vec[MAX_NUMNODES];
-
/* this partition's reserved page pointers */
struct xpc_rsvd_page *xpc_rsvd_page;
static u64 *xpc_part_nasids;
static int xp_nasid_mask_bytes; /* actual size in bytes of nasid mask */
static int xp_nasid_mask_words; /* actual size in words of nasid mask */
-
/*
* For performance reasons, each entry of xpc_partitions[] is cacheline
* aligned. And xpc_partitions[] is padded with an additional entry at the
*/
struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
-
/*
* Generic buffer used to store a local copy of portions of a remote
* partition's reserved page (either its header and part_nasids mask,
char *xpc_remote_copy_buffer;
void *xpc_remote_copy_buffer_base;
-
/*
* Guarantee that the kmalloc'd memory is cacheline aligned.
*/
{
/* see if kmalloc will give us cachline aligned memory by default */
*base = kmalloc(size, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
- if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
+
+ if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
return *base;
- }
+
kfree(*base);
/* nope, we'll have to do it ourselves */
*base = kmalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL) {
+ if (*base == NULL)
return NULL;
- }
- return (void *) L1_CACHE_ALIGN((u64) *base);
-}
+ return (void *)L1_CACHE_ALIGN((u64)*base);
+}
/*
* Given a nasid, get the physical address of the partition's reserved page
u64 buf_len = 0;
void *buf_base = NULL;
-
while (1) {
status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
- &len);
+ &len);
dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
"0x%016lx, address=0x%016lx, len=0x%016lx\n",
status, cookie, rp_pa, len);
- if (status != SALRET_MORE_PASSES) {
+ if (status != SALRET_MORE_PASSES)
break;
- }
if (L1_CACHE_ALIGN(len) > buf_len) {
kfree(buf_base);
buf_len = L1_CACHE_ALIGN(len);
- buf = (u64) xpc_kmalloc_cacheline_aligned(buf_len,
- GFP_KERNEL, &buf_base);
+ buf = (u64)xpc_kmalloc_cacheline_aligned(buf_len,
+ GFP_KERNEL,
+ &buf_base);
if (buf_base == NULL) {
dev_err(xpc_part, "unable to kmalloc "
"len=0x%016lx\n", buf_len);
}
bte_res = xp_bte_copy(rp_pa, buf, buf_len,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ (BTE_NOTIFY | BTE_WACQUIRE), NULL);
if (bte_res != BTE_SUCCESS) {
dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
status = SALRET_ERROR;
kfree(buf_base);
- if (status != SALRET_OK) {
+ if (status != SALRET_OK)
rp_pa = 0;
- }
+
dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
return rp_pa;
}
-
/*
* Fill the partition reserved page with the information needed by
* other partitions to discover we are alive and establish initial
u64 rp_pa, nasid_array = 0;
int i, ret;
-
/* get the local reserved page's address */
preempt_disable();
dev_err(xpc_part, "SAL failed to locate the reserved page\n");
return NULL;
}
- rp = (struct xpc_rsvd_page *) __va(rp_pa);
+ rp = (struct xpc_rsvd_page *)__va(rp_pa);
if (rp->partid != sn_partition_id) {
dev_err(xpc_part, "the reserved page's partid of %d should be "
* on subsequent loads of XPC. This AMO page is never freed, and its
* memory protections are never restricted.
*/
- if ((amos_page = xpc_vars->amos_page) == NULL) {
- amos_page = (AMO_t *) TO_AMO(uncached_alloc_page(0));
+ amos_page = xpc_vars->amos_page;
+ if (amos_page == NULL) {
+ amos_page = (AMO_t *)TO_AMO(uncached_alloc_page(0));
if (amos_page == NULL) {
dev_err(xpc_part, "can't allocate page of AMOs\n");
return NULL;
* when xpc_allow_IPI_ops() is called via xpc_hb_init().
*/
if (!enable_shub_wars_1_1()) {
- ret = sn_change_memprotect(ia64_tpa((u64) amos_page),
- PAGE_SIZE, SN_MEMPROT_ACCESS_CLASS_1,
- &nasid_array);
+ ret = sn_change_memprotect(ia64_tpa((u64)amos_page),
+ PAGE_SIZE,
+ SN_MEMPROT_ACCESS_CLASS_1,
+ &nasid_array);
if (ret != 0) {
dev_err(xpc_part, "can't change memory "
"protections\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
- TO_PHYS((u64) amos_page));
+ TO_PHYS((u64)amos_page));
return NULL;
}
}
- } else if (!IS_AMO_ADDRESS((u64) amos_page)) {
+ } else if (!IS_AMO_ADDRESS((u64)amos_page)) {
/*
* EFI's XPBOOT can also set amos_page in the reserved page,
* but it happens to leave it as an uncached physical address
* and we need it to be an uncached virtual, so we'll have to
* convert it.
*/
- if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
+ if (!IS_AMO_PHYS_ADDRESS((u64)amos_page)) {
dev_err(xpc_part, "previously used amos_page address "
- "is bad = 0x%p\n", (void *) amos_page);
+ "is bad = 0x%p\n", (void *)amos_page);
return NULL;
}
- amos_page = (AMO_t *) TO_AMO((u64) amos_page);
+ amos_page = (AMO_t *)TO_AMO((u64)amos_page);
}
/* clear xpc_vars */
xpc_vars->act_nasid = cpuid_to_nasid(0);
xpc_vars->act_phys_cpuid = cpu_physical_id(0);
xpc_vars->vars_part_pa = __pa(xpc_vars_part);
- xpc_vars->amos_page_pa = ia64_tpa((u64) amos_page);
- xpc_vars->amos_page = amos_page; /* save for next load of XPC */
-
+ xpc_vars->amos_page_pa = ia64_tpa((u64)amos_page);
+ xpc_vars->amos_page = amos_page; /* save for next load of XPC */
/* clear xpc_vars_part */
- memset((u64 *) xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
- XP_MAX_PARTITIONS);
+ memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
+ XP_MAX_PARTITIONS);
/* initialize the activate IRQ related AMO variables */
- for (i = 0; i < xp_nasid_mask_words; i++) {
- (void) xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
- }
+ for (i = 0; i < xp_nasid_mask_words; i++)
+ (void)xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
/* initialize the engaged remote partitions related AMO variables */
- (void) xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
- (void) xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
+ (void)xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
+ (void)xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
/* timestamp of when reserved page was setup by XPC */
rp->stamp = CURRENT_TIME;
return rp;
}
-
/*
* Change protections to allow IPI operations (and AMO operations on
* Shub 1.1 systems).
int node;
int nasid;
-
- // >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+ /* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
if (is_shub2()) {
xpc_sh2_IPI_access0 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
xpc_sh2_IPI_access1 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
xpc_sh2_IPI_access2 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
xpc_sh2_IPI_access3 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
- -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+ -1UL);
}
} else {
xpc_sh1_IPI_access =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
- -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+ -1UL);
/*
* Since the BIST collides with memory operations on
*/
if (enable_shub_wars_1_1()) {
/* open up everything */
- xpc_prot_vec[node] = (u64) HUB_L((u64 *)
- GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0));
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQRP_MMR_DIR_PRIVEC0),
- -1UL);
+ xpc_prot_vec[node] = (u64)HUB_L((u64 *)
+ GLOBAL_MMR_ADDR
+ (nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0));
+ HUB_S((u64 *)
+ GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+ -1UL);
+ HUB_S((u64 *)
+ GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+ -1UL);
}
}
}
}
-
/*
* Restrict protections to disallow IPI operations (and AMO operations on
* Shub 1.1 systems).
int node;
int nasid;
-
- // >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+ /* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
if (is_shub2()) {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
- xpc_sh2_IPI_access0);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
- xpc_sh2_IPI_access1);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
- xpc_sh2_IPI_access2);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
- xpc_sh2_IPI_access3);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+ xpc_sh2_IPI_access0);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+ xpc_sh2_IPI_access1);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+ xpc_sh2_IPI_access2);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+ xpc_sh2_IPI_access3);
}
} else {
for_each_online_node(node) {
nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
- xpc_sh1_IPI_access);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+ xpc_sh1_IPI_access);
if (enable_shub_wars_1_1()) {
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0),
- xpc_prot_vec[node]);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQRP_MMR_DIR_PRIVEC0),
- xpc_prot_vec[node]);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+ xpc_prot_vec[node]);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+ xpc_prot_vec[node]);
}
}
}
}
-
/*
* At periodic intervals, scan through all active partitions and ensure
* their heartbeat is still active. If not, the partition is deactivated.
partid_t partid;
bte_result_t bres;
-
- remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars *)xpc_remote_copy_buffer;
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
- if (xpc_exiting) {
+ if (xpc_exiting)
break;
- }
- if (partid == sn_partition_id) {
+ if (partid == sn_partition_id)
continue;
- }
part = &xpc_partitions[partid];
if (part->act_state == XPC_P_INACTIVE ||
- part->act_state == XPC_P_DEACTIVATING) {
+ part->act_state == XPC_P_DEACTIVATING) {
continue;
}
/* pull the remote_hb cache line */
bres = xp_bte_copy(part->remote_vars_pa,
- (u64) remote_vars,
- XPC_RP_VARS_SIZE,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ (u64)remote_vars,
+ XPC_RP_VARS_SIZE,
+ (BTE_NOTIFY | BTE_WACQUIRE), NULL);
if (bres != BTE_SUCCESS) {
XPC_DEACTIVATE_PARTITION(part,
- xpc_map_bte_errors(bres));
+ xpc_map_bte_errors(bres));
continue;
}
remote_vars->heartbeating_to_mask);
if (((remote_vars->heartbeat == part->last_heartbeat) &&
- (remote_vars->heartbeat_offline == 0)) ||
- !xpc_hb_allowed(sn_partition_id, remote_vars)) {
+ (remote_vars->heartbeat_offline == 0)) ||
+ !xpc_hb_allowed(sn_partition_id, remote_vars)) {
XPC_DEACTIVATE_PARTITION(part, xpcNoHeartbeat);
continue;
}
}
-
/*
* Get a copy of a portion of the remote partition's rsvd page.
*
*/
static enum xpc_retval
xpc_get_remote_rp(int nasid, u64 *discovered_nasids,
- struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
+ struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
{
int bres, i;
-
/* get the reserved page's physical address */
*remote_rp_pa = xpc_get_rsvd_page_pa(nasid);
- if (*remote_rp_pa == 0) {
+ if (*remote_rp_pa == 0)
return xpcNoRsvdPageAddr;
- }
-
/* pull over the reserved page header and part_nasids mask */
- bres = xp_bte_copy(*remote_rp_pa, (u64) remote_rp,
- XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bres != BTE_SUCCESS) {
+ bres = xp_bte_copy(*remote_rp_pa, (u64)remote_rp,
+ XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
+ (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ if (bres != BTE_SUCCESS)
return xpc_map_bte_errors(bres);
- }
-
if (discovered_nasids != NULL) {
u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);
-
- for (i = 0; i < xp_nasid_mask_words; i++) {
+ for (i = 0; i < xp_nasid_mask_words; i++)
discovered_nasids[i] |= remote_part_nasids[i];
- }
}
-
/* check that the partid is for another partition */
if (remote_rp->partid < 1 ||
- remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
+ remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
return xpcInvalidPartid;
}
- if (remote_rp->partid == sn_partition_id) {
+ if (remote_rp->partid == sn_partition_id)
return xpcLocalPartid;
- }
-
if (XPC_VERSION_MAJOR(remote_rp->version) !=
- XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
+ XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
return xpcBadVersion;
}
return xpcSuccess;
}
-
/*
* Get a copy of the remote partition's XPC variables from the reserved page.
*
{
int bres;
-
- if (remote_vars_pa == 0) {
+ if (remote_vars_pa == 0)
return xpcVarsNotSet;
- }
/* pull over the cross partition variables */
- bres = xp_bte_copy(remote_vars_pa, (u64) remote_vars, XPC_RP_VARS_SIZE,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bres != BTE_SUCCESS) {
+ bres = xp_bte_copy(remote_vars_pa, (u64)remote_vars, XPC_RP_VARS_SIZE,
+ (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ if (bres != BTE_SUCCESS)
return xpc_map_bte_errors(bres);
- }
if (XPC_VERSION_MAJOR(remote_vars->version) !=
- XPC_VERSION_MAJOR(XPC_V_VERSION)) {
+ XPC_VERSION_MAJOR(XPC_V_VERSION)) {
return xpcBadVersion;
}
return xpcSuccess;
}
-
/*
* Update the remote partition's info.
*/
static void
xpc_update_partition_info(struct xpc_partition *part, u8 remote_rp_version,
- struct timespec *remote_rp_stamp, u64 remote_rp_pa,
- u64 remote_vars_pa, struct xpc_vars *remote_vars)
+ struct timespec *remote_rp_stamp, u64 remote_rp_pa,
+ u64 remote_vars_pa, struct xpc_vars *remote_vars)
{
part->remote_rp_version = remote_rp_version;
dev_dbg(xpc_part, " remote_rp_version = 0x%016x\n",
part->remote_vars_version);
}
-
/*
* Prior code has determined the nasid which generated an IPI. Inspect
* that nasid to determine if its partition needs to be activated or
struct xpc_partition *part;
enum xpc_retval ret;
-
/* pull over the reserved page structure */
- remote_rp = (struct xpc_rsvd_page *) xpc_remote_copy_buffer;
+ remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer;
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
if (ret != xpcSuccess) {
dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
- "which sent interrupt, reason=%d\n", nasid, ret);
+ "which sent interrupt, reason=%d\n", nasid, ret);
return;
}
remote_vars_pa = remote_rp->vars_pa;
remote_rp_version = remote_rp->version;
- if (XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
+ if (XPC_SUPPORTS_RP_STAMP(remote_rp_version))
remote_rp_stamp = remote_rp->stamp;
- }
+
partid = remote_rp->partid;
part = &xpc_partitions[partid];
-
/* pull over the cross partition variables */
- remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars *)xpc_remote_copy_buffer;
ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
if (ret != xpcSuccess) {
dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
- "which sent interrupt, reason=%d\n", nasid, ret);
+ "which sent interrupt, reason=%d\n", nasid, ret);
XPC_DEACTIVATE_PARTITION(part, ret);
return;
}
-
part->act_IRQ_rcvd++;
dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
- "%ld:0x%lx\n", (int) nasid, (int) partid, part->act_IRQ_rcvd,
+ "%ld:0x%lx\n", (int)nasid, (int)partid, part->act_IRQ_rcvd,
remote_vars->heartbeat, remote_vars->heartbeating_to_mask);
if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_INACTIVE) {
xpc_update_partition_info(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
+ &remote_rp_stamp, remote_rp_pa,
+ remote_vars_pa, remote_vars);
if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
if (xpc_partition_disengage_requested(1UL << partid)) {
if (!XPC_SUPPORTS_RP_STAMP(part->remote_rp_version)) {
DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(part->
- remote_vars_version));
+ remote_vars_version));
if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
- version));
+ version));
/* see if the other side rebooted */
if (part->remote_amos_page_pa ==
- remote_vars->amos_page_pa &&
- xpc_hb_allowed(sn_partition_id,
- remote_vars)) {
+ remote_vars->amos_page_pa &&
+ xpc_hb_allowed(sn_partition_id, remote_vars)) {
/* doesn't look that way, so ignore the IPI */
return;
}
*/
xpc_update_partition_info(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
+ &remote_rp_stamp, remote_rp_pa,
+ remote_vars_pa, remote_vars);
part->reactivate_nasid = nasid;
XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
return;
xpc_clear_partition_disengage_request(1UL << partid);
xpc_update_partition_info(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
+ &remote_rp_stamp, remote_rp_pa,
+ remote_vars_pa, remote_vars);
reactivate = 1;
} else {
DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->version));
stamp_diff = xpc_compare_stamps(&part->remote_rp_stamp,
- &remote_rp_stamp);
+ &remote_rp_stamp);
if (stamp_diff != 0) {
DBUG_ON(stamp_diff >= 0);
DBUG_ON(xpc_partition_engaged(1UL << partid));
DBUG_ON(xpc_partition_disengage_requested(1UL <<
- partid));
+ partid));
xpc_update_partition_info(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
+ &remote_rp_stamp,
+ remote_rp_pa, remote_vars_pa,
+ remote_vars);
reactivate = 1;
}
}
if (part->disengage_request_timeout > 0 &&
- !xpc_partition_disengaged(part)) {
+ !xpc_partition_disengaged(part)) {
/* still waiting on other side to disengage from us */
return;
}
XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
} else if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version) &&
- xpc_partition_disengage_requested(1UL << partid)) {
+ xpc_partition_disengage_requested(1UL << partid)) {
XPC_DEACTIVATE_PARTITION(part, xpcOtherGoingDown);
}
}
-
/*
* Loop through the activation AMO variables and process any bits
* which are set. Each bit indicates a nasid sending a partition
{
int word, bit;
u64 nasid_mask;
- u64 nasid; /* remote nasid */
+ u64 nasid; /* remote nasid */
int n_IRQs_detected = 0;
AMO_t *act_amos;
-
act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
-
/* scan through act AMO variable looking for non-zero entries */
for (word = 0; word < xp_nasid_mask_words; word++) {
- if (xpc_exiting) {
+ if (xpc_exiting)
break;
- }
nasid_mask = xpc_IPI_receive(&act_amos[word]);
if (nasid_mask == 0) {
dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
nasid_mask);
-
/*
* If this nasid has been added to the machine since
* our partition was reset, this will retain the
*/
xpc_mach_nasids[word] |= nasid_mask;
-
/* locate the nasid(s) which sent interrupts */
for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
return n_IRQs_detected;
}
-
/*
* See if the other side has responded to a partition disengage request
* from us.
partid_t partid = XPC_PARTID(part);
int disengaged;
-
disengaged = (xpc_partition_engaged(1UL << partid) == 0);
if (part->disengage_request_timeout) {
if (!disengaged) {
- if (time_before(jiffies, part->disengage_request_timeout)) {
+ if (time_before(jiffies,
+ part->disengage_request_timeout)) {
/* timelimit hasn't been reached yet */
return 0;
}
*/
dev_info(xpc_part, "disengage from remote partition %d "
- "timed out\n", partid);
+ "timed out\n", partid);
xpc_disengage_request_timedout = 1;
xpc_clear_partition_engaged(1UL << partid);
disengaged = 1;
/* cancel the timer function, provided it's not us */
if (!in_interrupt()) {
del_singleshot_timer_sync(&part->
- disengage_request_timer);
+ disengage_request_timer);
}
DBUG_ON(part->act_state != XPC_P_DEACTIVATING &&
- part->act_state != XPC_P_INACTIVE);
- if (part->act_state != XPC_P_INACTIVE) {
+ part->act_state != XPC_P_INACTIVE);
+ if (part->act_state != XPC_P_INACTIVE)
xpc_wakeup_channel_mgr(part);
- }
- if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
+ if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version))
xpc_cancel_partition_disengage_request(part);
- }
}
return disengaged;
}
-
/*
* Mark specified partition as active.
*/
unsigned long irq_flags;
enum xpc_retval ret;
-
dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
spin_lock_irqsave(&part->act_lock, irq_flags);
return ret;
}
-
/*
* Notify XPC that the partition is down.
*/
void
xpc_deactivate_partition(const int line, struct xpc_partition *part,
- enum xpc_retval reason)
+ enum xpc_retval reason)
{
unsigned long irq_flags;
-
spin_lock_irqsave(&part->act_lock, irq_flags);
if (part->act_state == XPC_P_INACTIVE) {
}
if (part->act_state == XPC_P_DEACTIVATING) {
if ((part->reason == xpcUnloading && reason != xpcUnloading) ||
- reason == xpcReactivating) {
+ reason == xpcReactivating) {
XPC_SET_REASON(part, reason, line);
}
spin_unlock_irqrestore(&part->act_lock, irq_flags);
/* set a timelimit on the disengage request */
part->disengage_request_timeout = jiffies +
- (xpc_disengage_request_timelimit * HZ);
+ (xpc_disengage_request_timelimit * HZ);
part->disengage_request_timer.expires =
- part->disengage_request_timeout;
+ part->disengage_request_timeout;
add_timer(&part->disengage_request_timer);
}
xpc_partition_going_down(part, reason);
}
-
/*
* Mark specified partition as inactive.
*/
{
unsigned long irq_flags;
-
dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
XPC_PARTID(part));
part->remote_rp_pa = 0;
}
-
/*
* SAL has provided a partition and machine mask. The partition mask
* contains a bit for each even nasid in our partition. The machine
u64 *discovered_nasids;
enum xpc_retval ret;
-
remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
- xp_nasid_mask_bytes,
- GFP_KERNEL, &remote_rp_base);
- if (remote_rp == NULL) {
+ xp_nasid_mask_bytes,
+ GFP_KERNEL, &remote_rp_base);
+ if (remote_rp == NULL)
return;
- }
- remote_vars = (struct xpc_vars *) remote_rp;
+ remote_vars = (struct xpc_vars *)remote_rp;
discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
- GFP_KERNEL);
+ GFP_KERNEL);
if (discovered_nasids == NULL) {
kfree(remote_rp_base);
return;
}
- rp = (struct xpc_rsvd_page *) xpc_rsvd_page;
+ rp = (struct xpc_rsvd_page *)xpc_rsvd_page;
/*
* The term 'region' in this context refers to the minimum number of
for (region = 0; region < max_regions; region++) {
- if ((volatile int) xpc_exiting) {
+ if (xpc_exiting)
break;
- }
dev_dbg(xpc_part, "searching region %d\n", region);
for (nasid = (region * region_size * 2);
- nasid < ((region + 1) * region_size * 2);
- nasid += 2) {
+ nasid < ((region + 1) * region_size * 2); nasid += 2) {
- if ((volatile int) xpc_exiting) {
+ if (xpc_exiting)
break;
- }
dev_dbg(xpc_part, "checking nasid %d\n", nasid);
-
if (XPC_NASID_IN_ARRAY(nasid, xpc_part_nasids)) {
dev_dbg(xpc_part, "PROM indicates Nasid %d is "
"part of the local partition; skipping "
continue;
}
-
/* pull over the reserved page structure */
ret = xpc_get_remote_rp(nasid, discovered_nasids,
- remote_rp, &remote_rp_pa);
+ remote_rp, &remote_rp_pa);
if (ret != xpcSuccess) {
dev_dbg(xpc_part, "unable to get reserved page "
"from nasid %d, reason=%d\n", nasid,
ret);
- if (ret == xpcLocalPartid) {
+ if (ret == xpcLocalPartid)
break;
- }
+
continue;
}
partid = remote_rp->partid;
part = &xpc_partitions[partid];
-
/* pull over the cross partition variables */
ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
* get the same page for remote_act_amos_pa after
* module reloads and system reboots.
*/
- if (sn_register_xp_addr_region(
- remote_vars->amos_page_pa,
- PAGE_SIZE, 1) < 0) {
- dev_dbg(xpc_part, "partition %d failed to "
+ if (sn_register_xp_addr_region
+ (remote_vars->amos_page_pa, PAGE_SIZE, 1) < 0) {
+ dev_dbg(xpc_part,
+ "partition %d failed to "
"register xp_addr region 0x%016lx\n",
partid, remote_vars->amos_page_pa);
XPC_SET_REASON(part, xpcPhysAddrRegFailed,
- __LINE__);
+ __LINE__);
break;
}
remote_vars->act_phys_cpuid);
if (XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
- version)) {
+ version)) {
part->remote_amos_page_pa =
- remote_vars->amos_page_pa;
+ remote_vars->amos_page_pa;
xpc_mark_partition_disengaged(part);
xpc_cancel_partition_disengage_request(part);
}
kfree(remote_rp_base);
}
-
/*
* Given a partid, get the nasids owned by that partition from the
* remote partition's reserved page.
u64 part_nasid_pa;
int bte_res;
-
part = &xpc_partitions[partid];
- if (part->remote_rp_pa == 0) {
+ if (part->remote_rp_pa == 0)
return xpcPartitionDown;
- }
memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
- part_nasid_pa = (u64) XPC_RP_PART_NASIDS(part->remote_rp_pa);
+ part_nasid_pa = (u64)XPC_RP_PART_NASIDS(part->remote_rp_pa);
- bte_res = xp_bte_copy(part_nasid_pa, (u64) nasid_mask,
- xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ bte_res = xp_bte_copy(part_nasid_pa, (u64)nasid_mask,
+ xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE),
+ NULL);
return xpc_map_bte_errors(bte_res);
}
-
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1999-2008 Silicon Graphics, Inc. All rights reserved.
*/
-
/*
* Cross Partition Network Interface (XPNET) support
*
*
*/
-
#include <linux/module.h>
+#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <asm/sn/bte.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_sal.h>
-#include <asm/types.h>
#include <asm/atomic.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
/*
* The message payload transferred by XPC.
#define XPNET_MSG_ALIGNED_SIZE (L1_CACHE_ALIGN(XPNET_MSG_SIZE))
#define XPNET_MSG_NENTRIES (PAGE_SIZE / XPNET_MSG_ALIGNED_SIZE)
-
#define XPNET_MAX_KTHREADS (XPNET_MSG_NENTRIES + 1)
#define XPNET_MAX_IDLE_KTHREADS (XPNET_MSG_NENTRIES + 1)
#define XPNET_VERSION_MAJOR(_v) ((_v) >> 4)
#define XPNET_VERSION_MINOR(_v) ((_v) & 0xf)
-#define XPNET_VERSION _XPNET_VERSION(1,0) /* version 1.0 */
-#define XPNET_VERSION_EMBED _XPNET_VERSION(1,1) /* version 1.1 */
-#define XPNET_MAGIC 0x88786984 /* "XNET" */
+#define XPNET_VERSION _XPNET_VERSION(1, 0) /* version 1.0 */
+#define XPNET_VERSION_EMBED _XPNET_VERSION(1, 1) /* version 1.1 */
+#define XPNET_MAGIC 0x88786984 /* "XNET" */
#define XPNET_VALID_MSG(_m) \
((XPNET_VERSION_MAJOR(_m->version) == XPNET_VERSION_MAJOR(XPNET_VERSION)) \
#define XPNET_DEVICE_NAME "xp0"
-
/*
* When messages are queued with xpc_send_notify, a kmalloc'd buffer
* of the following type is passed as a notification cookie. When the
/* 32KB has been determined to be the ideal */
#define XPNET_DEF_MTU (0x8000UL)
-
/*
* The partition id is encapsulated in the MAC address. The following
* define locates the octet the partid is in.
#define XPNET_PARTID_OCTET 1
#define XPNET_LICENSE_OCTET 2
-
/*
* Define the XPNET debug device structure that is to be used with dev_dbg(),
* dev_err(), dev_warn(), and dev_info().
};
struct device xpnet_dbg_subname = {
- .bus_id = {0}, /* set to "" */
+ .bus_id = {0}, /* set to "" */
.driver = &xpnet_dbg_name
};
struct sk_buff *skb;
bte_result_t bret;
struct xpnet_dev_private *priv =
- (struct xpnet_dev_private *) xpnet_device->priv;
-
+ (struct xpnet_dev_private *)xpnet_device->priv;
if (!XPNET_VALID_MSG(msg)) {
/*
* Packet with a different XPC version. Ignore.
*/
- xpc_received(partid, channel, (void *) msg);
+ xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
msg->leadin_ignore, msg->tailout_ignore);
-
/* reserve an extra cache line */
skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
if (!skb) {
dev_err(xpnet, "failed on dev_alloc_skb(%d)\n",
msg->size + L1_CACHE_BYTES);
- xpc_received(partid, channel, (void *) msg);
+ xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
* Move the data over from the other side.
*/
if ((XPNET_VERSION_MINOR(msg->version) == 1) &&
- (msg->embedded_bytes != 0)) {
+ (msg->embedded_bytes != 0)) {
dev_dbg(xpnet, "copying embedded message. memcpy(0x%p, 0x%p, "
"%lu)\n", skb->data, &msg->data,
- (size_t) msg->embedded_bytes);
+ (size_t)msg->embedded_bytes);
- skb_copy_to_linear_data(skb, &msg->data, (size_t)msg->embedded_bytes);
+ skb_copy_to_linear_data(skb, &msg->data,
+ (size_t)msg->embedded_bytes);
} else {
dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
"bte_copy(0x%p, 0x%p, %hu)\n", (void *)msg->buf_pa,
msg->size, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
if (bret != BTE_SUCCESS) {
- // >>> Need better way of cleaning skb. Currently skb
- // >>> appears in_use and we can't just call
- // >>> dev_kfree_skb.
+ /*
+ * >>> Need better way of cleaning skb. Currently skb
+ * >>> appears in_use and we can't just call
+ * >>> dev_kfree_skb.
+ */
dev_err(xpnet, "bte_copy(0x%p, 0x%p, 0x%hx) returned "
"error=0x%x\n", (void *)msg->buf_pa,
(void *)__pa((u64)skb->data &
- ~(L1_CACHE_BYTES - 1)),
+ ~(L1_CACHE_BYTES - 1)),
msg->size, bret);
- xpc_received(partid, channel, (void *) msg);
+ xpc_received(partid, channel, (void *)msg);
priv->stats.rx_errors++;
}
dev_dbg(xpnet, "<skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
- "skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+ "skb->end=0x%p skb->len=%d\n", (void *)skb->head,
(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
skb->len);
(void *)skb->head, (void *)skb->data, skb_tail_pointer(skb),
skb_end_pointer(skb), skb->len);
-
xpnet_device->last_rx = jiffies;
priv->stats.rx_packets++;
priv->stats.rx_bytes += skb->len + ETH_HLEN;
netif_rx_ni(skb);
- xpc_received(partid, channel, (void *) msg);
+ xpc_received(partid, channel, (void *)msg);
}
-
/*
* This is the handler which XPC calls during any sort of change in
* state or message reception on a connection.
{
long bp;
-
DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
DBUG_ON(channel != XPC_NET_CHANNEL);
- switch(reason) {
+ switch (reason) {
case xpcMsgReceived: /* message received */
DBUG_ON(data == NULL);
- xpnet_receive(partid, channel, (struct xpnet_message *) data);
+ xpnet_receive(partid, channel, (struct xpnet_message *)data);
break;
case xpcConnected: /* connection completed to a partition */
spin_lock_bh(&xpnet_broadcast_lock);
- xpnet_broadcast_partitions |= 1UL << (partid -1 );
+ xpnet_broadcast_partitions |= 1UL << (partid - 1);
bp = xpnet_broadcast_partitions;
spin_unlock_bh(&xpnet_broadcast_lock);
default:
spin_lock_bh(&xpnet_broadcast_lock);
- xpnet_broadcast_partitions &= ~(1UL << (partid -1 ));
+ xpnet_broadcast_partitions &= ~(1UL << (partid - 1));
bp = xpnet_broadcast_partitions;
spin_unlock_bh(&xpnet_broadcast_lock);
- if (bp == 0) {
+ if (bp == 0)
netif_carrier_off(xpnet_device);
- }
dev_dbg(xpnet, "%s disconnected from partition %d; "
"xpnet_broadcast_partitions=0x%lx\n",
}
}
-
static int
xpnet_dev_open(struct net_device *dev)
{
enum xpc_retval ret;
-
dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %ld, %ld, %ld, "
"%ld)\n", XPC_NET_CHANNEL, xpnet_connection_activity,
XPNET_MSG_SIZE, XPNET_MSG_NENTRIES, XPNET_MAX_KTHREADS,
return 0;
}
-
static int
xpnet_dev_stop(struct net_device *dev)
{
return 0;
}
-
static int
xpnet_dev_change_mtu(struct net_device *dev, int new_mtu)
{
return 0;
}
-
/*
* Required for the net_device structure.
*/
return 0;
}
-
/*
* Return statistics to the caller.
*/
{
struct xpnet_dev_private *priv;
-
- priv = (struct xpnet_dev_private *) dev->priv;
+ priv = (struct xpnet_dev_private *)dev->priv;
return &priv->stats;
}
-
/*
* Notification that the other end has received the message and
* DMA'd the skb information. At this point, they are done with
*/
static void
xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
- void *__qm)
+ void *__qm)
{
- struct xpnet_pending_msg *queued_msg =
- (struct xpnet_pending_msg *) __qm;
-
+ struct xpnet_pending_msg *queued_msg = (struct xpnet_pending_msg *)__qm;
DBUG_ON(queued_msg == NULL);
if (atomic_dec_return(&queued_msg->use_count) == 0) {
dev_dbg(xpnet, "all acks for skb->head=-x%p\n",
- (void *) queued_msg->skb->head);
+ (void *)queued_msg->skb->head);
dev_kfree_skb_any(queued_msg->skb);
kfree(queued_msg);
}
}
-
/*
* Network layer has formatted a packet (skb) and is ready to place it
* "on the wire". Prepare and send an xpnet_message to all partitions
struct xpnet_dev_private *priv;
u16 embedded_bytes;
-
- priv = (struct xpnet_dev_private *) dev->priv;
-
+ priv = (struct xpnet_dev_private *)dev->priv;
dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
- "skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+ "skb->end=0x%p skb->len=%d\n", (void *)skb->head,
(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
skb->len);
-
/*
* The xpnet_pending_msg tracks how many outstanding
* xpc_send_notifies are relying on this skb. When none
queued_msg = kmalloc(sizeof(struct xpnet_pending_msg), GFP_ATOMIC);
if (queued_msg == NULL) {
dev_warn(xpnet, "failed to kmalloc %ld bytes; dropping "
- "packet\n", sizeof(struct xpnet_pending_msg));
+ "packet\n", sizeof(struct xpnet_pending_msg));
priv->stats.tx_errors++;
return -ENOMEM;
}
-
/* get the beginning of the first cacheline and end of last */
- start_addr = ((u64) skb->data & ~(L1_CACHE_BYTES - 1));
+ start_addr = ((u64)skb->data & ~(L1_CACHE_BYTES - 1));
end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
/* calculate how many bytes to embed in the XPC message */
embedded_bytes = skb->len;
}
-
/*
* Since the send occurs asynchronously, we set the count to one
* and begin sending. Any sends that happen to complete before
atomic_set(&queued_msg->use_count, 1);
queued_msg->skb = skb;
-
second_mac_octet = skb->data[XPNET_PARTID_OCTET];
if (second_mac_octet == 0xff) {
/* we are being asked to broadcast to all partitions */
dp = xpnet_broadcast_partitions;
} else if (second_mac_octet != 0) {
dp = xpnet_broadcast_partitions &
- (1UL << (second_mac_octet - 1));
+ (1UL << (second_mac_octet - 1));
} else {
/* 0 is an invalid partid. Ignore */
dp = 0;
for (dest_partid = 1; dp && dest_partid < XP_MAX_PARTITIONS;
dest_partid++) {
-
if (!(dp & (1UL << (dest_partid - 1)))) {
/* not destined for this partition */
continue;
/* remove this partition from the destinations mask */
dp &= ~(1UL << (dest_partid - 1));
-
/* found a partition to send to */
ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL,
XPC_NOWAIT, (void **)&msg);
- if (unlikely(ret != xpcSuccess)) {
+ if (unlikely(ret != xpcSuccess))
continue;
- }
msg->embedded_bytes = embedded_bytes;
if (unlikely(embedded_bytes != 0)) {
msg->version = XPNET_VERSION_EMBED;
dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
- &msg->data, skb->data, (size_t) embedded_bytes);
+ &msg->data, skb->data, (size_t)embedded_bytes);
skb_copy_from_linear_data(skb, &msg->data,
(size_t)embedded_bytes);
} else {
}
msg->magic = XPNET_MAGIC;
msg->size = end_addr - start_addr;
- msg->leadin_ignore = (u64) skb->data - start_addr;
+ msg->leadin_ignore = (u64)skb->data - start_addr;
msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
msg->buf_pa = __pa(start_addr);
dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
msg->leadin_ignore, msg->tailout_ignore);
-
atomic_inc(&queued_msg->use_count);
ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, msg,
atomic_dec(&queued_msg->use_count);
continue;
}
-
}
if (atomic_dec_return(&queued_msg->use_count) == 0) {
dev_dbg(xpnet, "no partitions to receive packet destined for "
"%d\n", dest_partid);
-
dev_kfree_skb(skb);
kfree(queued_msg);
}
return 0;
}
-
/*
* Deal with transmit timeouts coming from the network layer.
*/
static void
-xpnet_dev_tx_timeout (struct net_device *dev)
+xpnet_dev_tx_timeout(struct net_device *dev)
{
struct xpnet_dev_private *priv;
-
- priv = (struct xpnet_dev_private *) dev->priv;
+ priv = (struct xpnet_dev_private *)dev->priv;
priv->stats.tx_errors++;
return;
}
-
static int __init
xpnet_init(void)
{
u32 license_num;
int result = -ENOMEM;
-
- if (!ia64_platform_is("sn2")) {
+ if (!ia64_platform_is("sn2"))
return -ENODEV;
- }
dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
*/
xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private),
XPNET_DEVICE_NAME, ether_setup);
- if (xpnet_device == NULL) {
+ if (xpnet_device == NULL)
return -ENOMEM;
- }
netif_carrier_off(xpnet_device);
license_num = sn_partition_serial_number_val();
for (i = 3; i >= 0; i--) {
xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
- license_num & 0xff;
+ license_num & 0xff;
license_num = license_num >> 8;
}
xpnet_device->features = NETIF_F_NO_CSUM;
result = register_netdev(xpnet_device);
- if (result != 0) {
+ if (result != 0)
free_netdev(xpnet_device);
- }
return result;
}
-module_init(xpnet_init);
+module_init(xpnet_init);
static void __exit
xpnet_exit(void)
{
dev_info(xpnet, "unregistering network device %s\n",
- xpnet_device[0].name);
+ xpnet_device[0].name);
unregister_netdev(xpnet_device);
free_netdev(xpnet_device);
}
-module_exit(xpnet_exit);
+module_exit(xpnet_exit);
MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition Network adapter (XPNET)");
MODULE_LICENSE("GPL");
-
struct ia64_mca_notify_die {
struct ia64_sal_os_state *sos;
int *monarch_cpu;
+ int *data;
};
DECLARE_PER_CPU(u64, ia64_mca_pal_base);
git.openpandora.org / pandora-kernel.git / commitdiff