*
*/
-#include <linux/kernel.h>
#include <linux/delay.h>
#include <asm/uncached.h>
+#include <asm/sn/mspec.h>
#include <asm/sn/sn_sal.h>
#include "xpc.h"
-static struct xpc_vars_sn2 *xpc_vars; /* >>> Add _sn2 suffix? */
-static struct xpc_vars_part_sn2 *xpc_vars_part; /* >>> Add _sn2 suffix? */
+/*
+ * Define the number of u64s required to represent all the C-brick nasids
+ * as a bitmap. The cross-partition kernel modules deal only with
+ * C-brick nasids, thus the need for bitmaps which don't account for
+ * odd-numbered (non C-brick) nasids.
+ */
+#define XPC_MAX_PHYSNODES_SN2 (MAX_NUMALINK_NODES / 2)
+#define XP_NASID_MASK_BYTES_SN2 ((XPC_MAX_PHYSNODES_SN2 + 7) / 8)
+#define XP_NASID_MASK_WORDS_SN2 ((XPC_MAX_PHYSNODES_SN2 + 63) / 64)
+
+/*
+ * 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
+ * for cached references and an alternate TLB handler to never provide a
+ * cacheable mapping for the entire region. This will prevent speculative
+ * reading of cached copies of our lines from being issued which will cause
+ * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
+ * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
+ * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS_SN2) to identify
+ * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
+ * partitions (i.e., XPCs) consider themselves currently engaged with the
+ * local XPC and 1 amo variable to request partition deactivation.
+ */
+#define XPC_NOTIFY_IRQ_AMOS_SN2 0
+#define XPC_ACTIVATE_IRQ_AMOS_SN2 (XPC_NOTIFY_IRQ_AMOS_SN2 + \
+ XP_MAX_NPARTITIONS_SN2)
+#define XPC_ENGAGED_PARTITIONS_AMO_SN2 (XPC_ACTIVATE_IRQ_AMOS_SN2 + \
+ XP_NASID_MASK_WORDS_SN2)
+#define XPC_DEACTIVATE_REQUEST_AMO_SN2 (XPC_ENGAGED_PARTITIONS_AMO_SN2 + 1)
+
+/*
+ * Buffer used to store a local copy of portions of a remote partition's
+ * reserved page (either its header and part_nasids mask, or its vars).
+ */
+static void *xpc_remote_copy_buffer_base_sn2;
+static char *xpc_remote_copy_buffer_sn2;
+
+static struct xpc_vars_sn2 *xpc_vars_sn2;
+static struct xpc_vars_part_sn2 *xpc_vars_part_sn2;
+
+static int
+xpc_setup_partitions_sn_sn2(void)
+{
+ /* nothing needs to be done */
+ return 0;
+}
+
+/* SH_IPI_ACCESS shub register value on startup */
+static u64 xpc_sh1_IPI_access_sn2;
+static u64 xpc_sh2_IPI_access0_sn2;
+static u64 xpc_sh2_IPI_access1_sn2;
+static u64 xpc_sh2_IPI_access2_sn2;
+static u64 xpc_sh2_IPI_access3_sn2;
+
+/*
+ * Change protections to allow IPI operations.
+ */
+static void
+xpc_allow_IPI_ops_sn2(void)
+{
+ int node;
+ int nasid;
+
+ /* !!! The following should get moved into SAL. */
+ if (is_shub2()) {
+ xpc_sh2_IPI_access0_sn2 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
+ xpc_sh2_IPI_access1_sn2 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
+ xpc_sh2_IPI_access2_sn2 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
+ xpc_sh2_IPI_access3_sn2 =
+ (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);
+ }
+ } else {
+ xpc_sh1_IPI_access_sn2 =
+ (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);
+ }
+ }
+}
/*
- * The following set of macros and functions are used for the sending and
- * receiving of IPIs (also known as IRQs). There are two flavors of IPIs,
- * one that is associated with partition activity (SGI_XPC_ACTIVATE) and
- * the other that is associated with channel activity (SGI_XPC_NOTIFY).
+ * Restrict protections to disallow IPI operations.
+ */
+static void
+xpc_disallow_IPI_ops_sn2(void)
+{
+ int node;
+ int nasid;
+
+ /* !!! The following should get moved into SAL. */
+ 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_sn2);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+ xpc_sh2_IPI_access1_sn2);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+ xpc_sh2_IPI_access2_sn2);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+ xpc_sh2_IPI_access3_sn2);
+ }
+ } 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_sn2);
+ }
+ }
+}
+
+/*
+ * The following set of functions are used for the sending and receiving of
+ * IRQs (also known as IPIs). There are two flavors of IRQs, one that is
+ * associated with partition activity (SGI_XPC_ACTIVATE) and the other that
+ * is associated with channel activity (SGI_XPC_NOTIFY).
*/
static u64
-xpc_IPI_receive_sn2(AMO_t *amo)
+xpc_receive_IRQ_amo_sn2(struct amo *amo)
{
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
}
static enum xp_retval
-xpc_IPI_send_sn2(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
+xpc_send_IRQ_sn2(struct amo *amo, u64 flag, int nasid, int phys_cpuid,
+ int vector)
{
int ret = 0;
unsigned long irq_flags;
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
* didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
+ * keep sending IRQs and amos to it until the heartbeat times out.
*/
ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
xp_nofault_PIOR_target));
local_irq_restore(irq_flags);
- return ((ret == 0) ? xpSuccess : xpPioReadError);
+ return (ret == 0) ? xpSuccess : xpPioReadError;
}
-static AMO_t *
-xpc_IPI_init_sn2(int index)
+static struct amo *
+xpc_init_IRQ_amo_sn2(int index)
{
- AMO_t *amo = xpc_vars->amos_page + index;
+ struct amo *amo = xpc_vars_sn2->amos_page + index;
- (void)xpc_IPI_receive_sn2(amo); /* clear AMO variable */
+ (void)xpc_receive_IRQ_amo_sn2(amo); /* clear amo variable */
return amo;
}
/*
- * IPIs associated with SGI_XPC_ACTIVATE IRQ.
+ * Functions associated with SGI_XPC_ACTIVATE IRQ.
*/
/*
- * Flag the appropriate AMO variable and send an IPI to the specified node.
+ * Notify the heartbeat check thread that an activate IRQ has been received.
*/
-static void
-xpc_activate_IRQ_send_sn2(u64 amos_page_pa, int from_nasid, int to_nasid,
- int to_phys_cpuid)
+static irqreturn_t
+xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
{
- 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)));
+ unsigned long irq_flags;
- (void)xpc_IPI_send_sn2(&amos[w_index], (1UL << b_index), to_nasid,
- to_phys_cpuid, SGI_XPC_ACTIVATE);
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ xpc_activate_IRQ_rcvd++;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
+ return IRQ_HANDLED;
}
+/*
+ * Flag the appropriate amo variable and send an IRQ to the specified node.
+ */
static void
-xpc_activate_IRQ_send_local_sn2(int from_nasid)
+xpc_send_activate_IRQ_sn2(unsigned long amos_page_pa, int from_nasid,
+ int to_nasid, int to_phys_cpuid)
{
- int w_index = XPC_NASID_W_INDEX(from_nasid);
- int b_index = XPC_NASID_B_INDEX(from_nasid);
- AMO_t *amos = (AMO_t *)__va(xpc_vars->amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
+ struct amo *amos = (struct amo *)__va(amos_page_pa +
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
+ sizeof(struct amo)));
- /* fake the sending and receipt of an activate IRQ from remote nasid */
- FETCHOP_STORE_OP(TO_AMO((u64)&amos[w_index].variable), FETCHOP_OR,
- (1UL << b_index));
- atomic_inc(&xpc_act_IRQ_rcvd);
- wake_up_interruptible(&xpc_act_IRQ_wq);
+ (void)xpc_send_IRQ_sn2(&amos[BIT_WORD(from_nasid / 2)],
+ BIT_MASK(from_nasid / 2), to_nasid,
+ to_phys_cpuid, SGI_XPC_ACTIVATE);
}
static void
-xpc_IPI_send_local_activate_sn2(int from_nasid)
+xpc_send_local_activate_IRQ_sn2(int from_nasid)
{
- xpc_activate_IRQ_send_local_sn2(from_nasid);
-}
+ unsigned long irq_flags;
+ struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
+ sizeof(struct amo)));
-static void
-xpc_IPI_send_activated_sn2(struct xpc_partition *part)
-{
- xpc_activate_IRQ_send_sn2(part->remote_amos_page_pa,
- cnodeid_to_nasid(0), part->remote_act_nasid,
- part->remote_act_phys_cpuid);
+ /* fake the sending and receipt of an activate IRQ from remote nasid */
+ FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
+ FETCHOP_OR, BIT_MASK(from_nasid / 2));
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ xpc_activate_IRQ_rcvd++;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
}
+/*
+ * Functions associated with SGI_XPC_NOTIFY IRQ.
+ */
+
+/*
+ * Check to see if any chctl flags were sent from the specified partition.
+ */
static void
-xpc_IPI_send_local_reactivate_sn2(int from_nasid)
+xpc_check_for_sent_chctl_flags_sn2(struct xpc_partition *part)
{
- xpc_activate_IRQ_send_local_sn2(from_nasid);
+ union xpc_channel_ctl_flags chctl;
+ unsigned long irq_flags;
+
+ chctl.all_flags = xpc_receive_IRQ_amo_sn2(part->sn.sn2.
+ local_chctl_amo_va);
+ if (chctl.all_flags == 0)
+ return;
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ part->chctl.all_flags |= chctl.all_flags;
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+
+ dev_dbg(xpc_chan, "received notify IRQ from partid=%d, chctl.all_flags="
+ "0x%lx\n", XPC_PARTID(part), chctl.all_flags);
+
+ xpc_wakeup_channel_mgr(part);
}
-static void
-xpc_IPI_send_disengage_sn2(struct xpc_partition *part)
+/*
+ * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
+ * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
+ * than one partition, we use an amo structure per partition to indicate
+ * whether a partition has sent an IRQ or not. If it has, then wake up the
+ * associated kthread to handle it.
+ *
+ * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IRQs sent by XPC
+ * running on other partitions.
+ *
+ * Noteworthy Arguments:
+ *
+ * irq - Interrupt ReQuest number. NOT USED.
+ *
+ * dev_id - partid of IRQ's potential sender.
+ */
+static irqreturn_t
+xpc_handle_notify_IRQ_sn2(int irq, void *dev_id)
{
- xpc_activate_IRQ_send_sn2(part->remote_amos_page_pa,
- cnodeid_to_nasid(0), part->remote_act_nasid,
- part->remote_act_phys_cpuid);
+ short partid = (short)(u64)dev_id;
+ struct xpc_partition *part = &xpc_partitions[partid];
+
+ DBUG_ON(partid < 0 || partid >= XP_MAX_NPARTITIONS_SN2);
+
+ if (xpc_part_ref(part)) {
+ xpc_check_for_sent_chctl_flags_sn2(part);
+
+ xpc_part_deref(part);
+ }
+ return IRQ_HANDLED;
}
/*
- * IPIs associated with SGI_XPC_NOTIFY IRQ.
+ * Check to see if xpc_handle_notify_IRQ_sn2() dropped any IRQs on the floor
+ * because the write to their associated amo variable completed after the IRQ
+ * was received.
*/
+static void
+xpc_check_for_dropped_notify_IRQ_sn2(struct xpc_partition *part)
+{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+
+ if (xpc_part_ref(part)) {
+ xpc_check_for_sent_chctl_flags_sn2(part);
+
+ part_sn2->dropped_notify_IRQ_timer.expires = jiffies +
+ XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
+ add_timer(&part_sn2->dropped_notify_IRQ_timer);
+ xpc_part_deref(part);
+ }
+}
/*
- * Send an IPI to the remote partition that is associated with the
+ * Send a notify IRQ to the remote partition that is associated with the
* specified channel.
*/
static void
-xpc_notify_IRQ_send_sn2(struct xpc_channel *ch, u8 ipi_flag,
- char *ipi_flag_string, unsigned long *irq_flags)
+xpc_send_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
+ char *chctl_flag_string, unsigned long *irq_flags)
{
struct xpc_partition *part = &xpc_partitions[ch->partid];
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+ union xpc_channel_ctl_flags chctl = { 0 };
enum xp_retval ret;
- if (likely(part->act_state != XPC_P_DEACTIVATING)) {
- ret = xpc_IPI_send_sn2(part->remote_IPI_amo_va,
- (u64)ipi_flag << (ch->number * 8),
- part->remote_IPI_nasid,
- part->remote_IPI_phys_cpuid,
+ if (likely(part->act_state != XPC_P_AS_DEACTIVATING)) {
+ chctl.flags[ch->number] = chctl_flag;
+ ret = xpc_send_IRQ_sn2(part_sn2->remote_chctl_amo_va,
+ chctl.all_flags,
+ part_sn2->notify_IRQ_nasid,
+ part_sn2->notify_IRQ_phys_cpuid,
SGI_XPC_NOTIFY);
dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
- ipi_flag_string, ch->partid, ch->number, ret);
+ chctl_flag_string, ch->partid, ch->number, ret);
if (unlikely(ret != xpSuccess)) {
if (irq_flags != NULL)
spin_unlock_irqrestore(&ch->lock, *irq_flags);
}
}
-#define XPC_NOTIFY_IRQ_SEND_SN2(_ch, _ipi_f, _irq_f) \
- xpc_notify_IRQ_send_sn2(_ch, _ipi_f, #_ipi_f, _irq_f)
+#define XPC_SEND_NOTIFY_IRQ_SN2(_ch, _ipi_f, _irq_f) \
+ xpc_send_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f, _irq_f)
/*
* Make it look like the remote partition, which is associated with the
- * specified channel, sent us an IPI. This faked IPI will be handled
- * by xpc_dropped_IPI_check().
+ * specified channel, sent us a notify IRQ. This faked IRQ will be handled
+ * by xpc_check_for_dropped_notify_IRQ_sn2().
*/
static void
-xpc_notify_IRQ_send_local_sn2(struct xpc_channel *ch, u8 ipi_flag,
- char *ipi_flag_string)
+xpc_send_local_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
+ char *chctl_flag_string)
{
struct xpc_partition *part = &xpc_partitions[ch->partid];
+ union xpc_channel_ctl_flags chctl = { 0 };
- FETCHOP_STORE_OP(TO_AMO((u64)&part->local_IPI_amo_va->variable),
- FETCHOP_OR, ((u64)ipi_flag << (ch->number * 8)));
+ chctl.flags[ch->number] = chctl_flag;
+ FETCHOP_STORE_OP(TO_AMO((u64)&part->sn.sn2.local_chctl_amo_va->
+ variable), FETCHOP_OR, chctl.all_flags);
dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
- ipi_flag_string, ch->partid, ch->number);
+ chctl_flag_string, ch->partid, ch->number);
}
-#define XPC_NOTIFY_IRQ_SEND_LOCAL_SN2(_ch, _ipi_f) \
- xpc_notify_IRQ_send_local_sn2(_ch, _ipi_f, #_ipi_f)
+#define XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(_ch, _ipi_f) \
+ xpc_send_local_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f)
static void
-xpc_IPI_send_closerequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
+xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch,
+ unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->reason = ch->reason;
- XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_CLOSEREQUEST, irq_flags);
+ XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags);
}
static void
-xpc_IPI_send_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
+xpc_send_chctl_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
- XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_CLOSEREPLY, irq_flags);
+ XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREPLY, irq_flags);
}
static void
-xpc_IPI_send_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
+xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
- args->msg_size = ch->msg_size;
+ args->entry_size = ch->entry_size;
args->local_nentries = ch->local_nentries;
- XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_OPENREQUEST, irq_flags);
+ XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREQUEST, irq_flags);
}
static void
-xpc_IPI_send_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
+xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
args->remote_nentries = ch->remote_nentries;
args->local_nentries = ch->local_nentries;
- args->local_msgqueue_pa = __pa(ch->local_msgqueue);
- XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_OPENREPLY, irq_flags);
+ args->local_msgqueue_pa = xp_pa(ch->sn.sn2.local_msgqueue);
+ XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags);
+}
+
+static void
+xpc_send_chctl_msgrequest_sn2(struct xpc_channel *ch)
+{
+ XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST, NULL);
}
static void
-xpc_IPI_send_msgrequest_sn2(struct xpc_channel *ch)
+xpc_send_chctl_local_msgrequest_sn2(struct xpc_channel *ch)
{
- XPC_NOTIFY_IRQ_SEND_SN2(ch, XPC_IPI_MSGREQUEST, NULL);
+ XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
}
static void
-xpc_IPI_send_local_msgrequest_sn2(struct xpc_channel *ch)
+xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
+ unsigned long msgqueue_pa)
{
- XPC_NOTIFY_IRQ_SEND_LOCAL_SN2(ch, XPC_IPI_MSGREQUEST);
+ ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
}
/*
*/
static void
-xpc_mark_partition_engaged_sn2(struct xpc_partition *part)
+xpc_indicate_partition_engaged_sn2(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)));
+ struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
+ sizeof(struct amo)));
local_irq_save(irq_flags);
- /* set bit corresponding to our partid in remote partition's AMO */
+ /* 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));
+ BIT(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.
+ * keep sending IRQs and amos to it until the heartbeat times out.
*/
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
variable),
}
static void
-xpc_mark_partition_disengaged_sn2(struct xpc_partition *part)
+xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
- AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO *
- sizeof(AMO_t)));
+ struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
+ sizeof(struct amo)));
local_irq_save(irq_flags);
- /* clear bit corresponding to our partid in remote partition's AMO */
+ /* 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));
+ ~BIT(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.
+ * keep sending IRQs 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));
local_irq_restore(irq_flags);
-}
-
-static void
-xpc_request_partition_disengage_sn2(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)));
-
- 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));
/*
- * 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.
+ * Send activate IRQ to get other side to see that we've cleared our
+ * bit in their engaged partitions amo.
*/
- (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
- variable),
- xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
+ xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
+ cnodeid_to_nasid(0),
+ part_sn2->activate_IRQ_nasid,
+ part_sn2->activate_IRQ_phys_cpuid);
}
static void
-xpc_cancel_partition_disengage_request_sn2(struct xpc_partition *part)
+xpc_assume_partition_disengaged_sn2(short partid)
{
- unsigned long irq_flags;
- AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
- (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
-
- local_irq_save(irq_flags);
+ struct amo *amo = xpc_vars_sn2->amos_page +
+ XPC_ENGAGED_PARTITIONS_AMO_SN2;
- /* clear bit corresponding to our partid in remote partition's AMO */
+ /* clear bit(s) based on partid mask in our partition's amo */
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));
-
- local_irq_restore(irq_flags);
+ ~BIT(partid));
}
-static u64
-xpc_partition_engaged_sn2(u64 partid_mask)
+static int
+xpc_partition_engaged_sn2(short partid)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars_sn2->amos_page +
+ XPC_ENGAGED_PARTITIONS_AMO_SN2;
- /* return our partition's AMO variable ANDed with partid_mask */
+ /* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
- partid_mask);
+ BIT(partid)) != 0;
}
-static u64
-xpc_partition_disengage_requested_sn2(u64 partid_mask)
+static int
+xpc_any_partition_engaged_sn2(void)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
+ struct amo *amo = xpc_vars_sn2->amos_page +
+ XPC_ENGAGED_PARTITIONS_AMO_SN2;
- /* return our partition's AMO variable ANDed with partid_mask */
- return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
- partid_mask);
+ /* our partition's amo variable */
+ return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
}
-static void
-xpc_clear_partition_engaged_sn2(u64 partid_mask)
+/* original protection values for each node */
+static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
+
+/*
+ * Change protections to allow amo operations on non-Shub 1.1 systems.
+ */
+static enum xp_retval
+xpc_allow_amo_ops_sn2(struct amo *amos_page)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ u64 nasid_array = 0;
+ int ret;
- /* clear bit(s) based on partid_mask in our partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~partid_mask);
+ /*
+ * On SHUB 1.1, we cannot call sn_change_memprotect() since the BIST
+ * collides with memory operations. On those systems we call
+ * xpc_allow_amo_ops_shub_wars_1_1_sn2() instead.
+ */
+ if (!enable_shub_wars_1_1()) {
+ ret = sn_change_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE,
+ SN_MEMPROT_ACCESS_CLASS_1,
+ &nasid_array);
+ if (ret != 0)
+ return xpSalError;
+ }
+ return xpSuccess;
}
+/*
+ * Change protections to allow amo operations on Shub 1.1 systems.
+ */
static void
-xpc_clear_partition_disengage_request_sn2(u64 partid_mask)
+xpc_allow_amo_ops_shub_wars_1_1_sn2(void)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
+ int node;
+ int nasid;
- /* clear bit(s) based on partid_mask in our partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~partid_mask);
+ if (!enable_shub_wars_1_1())
+ return;
+
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ /* save current protection values */
+ xpc_prot_vec_sn2[node] =
+ (u64)HUB_L((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0));
+ /* open up everything */
+ 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);
+ }
}
static enum xp_retval
-xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
+xpc_get_partition_rsvd_page_pa_sn2(void *buf, u64 *cookie, unsigned long *rp_pa,
+ size_t *len)
{
- AMO_t *amos_page;
- u64 nasid_array = 0;
+ s64 status;
+ enum xp_retval ret;
+
+ status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
+ if (status == SALRET_OK)
+ ret = xpSuccess;
+ else if (status == SALRET_MORE_PASSES)
+ ret = xpNeedMoreInfo;
+ else
+ ret = xpSalError;
+
+ return ret;
+}
+
+
+static int
+xpc_setup_rsvd_page_sn_sn2(struct xpc_rsvd_page *rp)
+{
+ struct amo *amos_page;
int i;
int ret;
- xpc_vars = XPC_RP_VARS(rp);
+ xpc_vars_sn2 = XPC_RP_VARS(rp);
- rp->sn.vars_pa = __pa(xpc_vars);
+ rp->sn.vars_pa = xp_pa(xpc_vars_sn2);
/* vars_part array follows immediately after vars */
- xpc_vars_part = (struct xpc_vars_part_sn2 *)((u8 *)XPC_RP_VARS(rp) +
- XPC_RP_VARS_SIZE);
-
+ xpc_vars_part_sn2 = (struct xpc_vars_part_sn2 *)((u8 *)XPC_RP_VARS(rp) +
+ XPC_RP_VARS_SIZE);
/*
- * Before clearing xpc_vars, see if a page of AMOs had been previously
- * allocated. If not we'll need to allocate one and set permissions
- * so that cross-partition AMOs are allowed.
+ * Before clearing xpc_vars_sn2, see if a page of amos had been
+ * previously allocated. If not we'll need to allocate one and set
+ * permissions so that cross-partition amos are allowed.
*
- * The allocated AMO page needs MCA reporting to remain disabled after
+ * The allocated amo page needs MCA reporting to remain disabled after
* XPC has unloaded. To make this work, we keep a copy of the pointer
- * to this page (i.e., amos_page) in the struct xpc_vars structure,
+ * to this page (i.e., amos_page) in the struct xpc_vars_sn2 structure,
* which is pointed to by the reserved page, and re-use that saved copy
- * on subsequent loads of XPC. This AMO page is never freed, and its
+ * on subsequent loads of XPC. This amo page is never freed, and its
* memory protections are never restricted.
*/
- amos_page = xpc_vars->amos_page;
+ amos_page = xpc_vars_sn2->amos_page;
if (amos_page == NULL) {
- amos_page = (AMO_t *)TO_AMO(uncached_alloc_page(0, 1));
+ amos_page = (struct amo *)TO_AMO(uncached_alloc_page(0, 1));
if (amos_page == NULL) {
- dev_err(xpc_part, "can't allocate page of AMOs\n");
- return xpNoMemory;
+ dev_err(xpc_part, "can't allocate page of amos\n");
+ return -ENOMEM;
}
/*
- * Open up AMO-R/W to cpu. This is done for Shub 1.1 systems
- * when xpc_allow_IPI_ops() is called via xpc_hb_init().
+ * Open up amo-R/W to cpu. This is done on Shub 1.1 systems
+ * when xpc_allow_amo_ops_shub_wars_1_1_sn2() is called.
*/
- if (!enable_shub_wars_1_1()) {
- 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), 1);
- return xpSalError;
- }
+ ret = xpc_allow_amo_ops_sn2(amos_page);
+ if (ret != xpSuccess) {
+ dev_err(xpc_part, "can't allow amo operations\n");
+ uncached_free_page(__IA64_UNCACHED_OFFSET |
+ TO_PHYS((u64)amos_page), 1);
+ return -EPERM;
}
}
- /* clear xpc_vars */
- memset(xpc_vars, 0, sizeof(struct xpc_vars_sn2));
+ /* clear xpc_vars_sn2 */
+ memset(xpc_vars_sn2, 0, sizeof(struct xpc_vars_sn2));
- xpc_vars->version = XPC_V_VERSION;
- 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_sn2->version = XPC_V_VERSION;
+ xpc_vars_sn2->activate_IRQ_nasid = cpuid_to_nasid(0);
+ xpc_vars_sn2->activate_IRQ_phys_cpuid = cpu_physical_id(0);
+ xpc_vars_sn2->vars_part_pa = xp_pa(xpc_vars_part_sn2);
+ xpc_vars_sn2->amos_page_pa = ia64_tpa((u64)amos_page);
+ xpc_vars_sn2->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_sn2) *
- xp_max_npartitions);
+ /* clear xpc_vars_part_sn2 */
+ memset((u64 *)xpc_vars_part_sn2, 0, sizeof(struct xpc_vars_part_sn2) *
+ XP_MAX_NPARTITIONS_SN2);
- /* initialize the activate IRQ related AMO variables */
- for (i = 0; i < xp_nasid_mask_words; i++)
- (void)xpc_IPI_init_sn2(XPC_ACTIVATE_IRQ_AMOS + i);
+ /* initialize the activate IRQ related amo variables */
+ for (i = 0; i < xpc_nasid_mask_nlongs; i++)
+ (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
- /* initialize the engaged remote partitions related AMO variables */
- (void)xpc_IPI_init_sn2(XPC_ENGAGED_PARTITIONS_AMO);
- (void)xpc_IPI_init_sn2(XPC_DISENGAGE_REQUEST_AMO);
+ /* initialize the engaged remote partitions related amo variables */
+ (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
+ (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
- return xpSuccess;
+ return 0;
}
static void
xpc_increment_heartbeat_sn2(void)
{
- xpc_vars->heartbeat++;
+ xpc_vars_sn2->heartbeat++;
}
static void
xpc_offline_heartbeat_sn2(void)
{
xpc_increment_heartbeat_sn2();
- xpc_vars->heartbeat_offline = 1;
+ xpc_vars_sn2->heartbeat_offline = 1;
}
static void
xpc_online_heartbeat_sn2(void)
{
xpc_increment_heartbeat_sn2();
- xpc_vars->heartbeat_offline = 0;
+ xpc_vars_sn2->heartbeat_offline = 0;
}
static void
xpc_heartbeat_init_sn2(void)
{
- DBUG_ON(xpc_vars == NULL);
+ DBUG_ON(xpc_vars_sn2 == NULL);
- bitmap_zero(xpc_vars->heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
- xpc_heartbeating_to_mask = &xpc_vars->heartbeating_to_mask[0];
+ bitmap_zero(xpc_vars_sn2->heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
+ xpc_heartbeating_to_mask = &xpc_vars_sn2->heartbeating_to_mask[0];
xpc_online_heartbeat_sn2();
}
xpc_offline_heartbeat_sn2();
}
-/*
- * At periodic intervals, scan through all active partitions and ensure
- * their heartbeat is still active. If not, the partition is deactivated.
- */
-static void
-xpc_check_remote_hb_sn2(void)
+static enum xp_retval
+xpc_get_remote_heartbeat_sn2(struct xpc_partition *part)
{
struct xpc_vars_sn2 *remote_vars;
- struct xpc_partition *part;
- short partid;
enum xp_retval ret;
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
-
- for (partid = 0; partid < xp_max_npartitions; partid++) {
-
- if (xpc_exiting)
- break;
-
- if (partid == sn_partition_id)
- continue;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
- part = &xpc_partitions[partid];
-
- if (part->act_state == XPC_P_INACTIVE ||
- part->act_state == XPC_P_DEACTIVATING) {
- continue;
- }
-
- /* pull the remote_hb cache line */
- ret = xp_remote_memcpy(remote_vars,
- (void *)part->remote_vars_pa,
- XPC_RP_VARS_SIZE);
- if (ret != xpSuccess) {
- XPC_DEACTIVATE_PARTITION(part, ret);
- continue;
- }
-
- dev_dbg(xpc_part, "partid = %d, heartbeat = %ld, last_heartbeat"
- " = %ld, heartbeat_offline = %ld, HB_mask[0] = 0x%lx\n",
- partid, remote_vars->heartbeat, part->last_heartbeat,
- remote_vars->heartbeat_offline,
- remote_vars->heartbeating_to_mask[0]);
-
- if (((remote_vars->heartbeat == part->last_heartbeat) &&
- (remote_vars->heartbeat_offline == 0)) ||
- !xpc_hb_allowed(sn_partition_id,
- &remote_vars->heartbeating_to_mask)) {
-
- XPC_DEACTIVATE_PARTITION(part, xpNoHeartbeat);
- continue;
- }
+ /* pull the remote vars structure that contains the heartbeat */
+ ret = xp_remote_memcpy(xp_pa(remote_vars),
+ part->sn.sn2.remote_vars_pa,
+ XPC_RP_VARS_SIZE);
+ if (ret != xpSuccess)
+ return ret;
+ dev_dbg(xpc_part, "partid=%d, heartbeat=%ld, last_heartbeat=%ld, "
+ "heartbeat_offline=%ld, HB_mask[0]=0x%lx\n", XPC_PARTID(part),
+ remote_vars->heartbeat, part->last_heartbeat,
+ remote_vars->heartbeat_offline,
+ remote_vars->heartbeating_to_mask[0]);
+
+ if ((remote_vars->heartbeat == part->last_heartbeat &&
+ remote_vars->heartbeat_offline == 0) ||
+ !xpc_hb_allowed(sn_partition_id,
+ &remote_vars->heartbeating_to_mask)) {
+ ret = xpNoHeartbeat;
+ } else {
part->last_heartbeat = remote_vars->heartbeat;
}
+
+ return ret;
}
/*
* assumed to be of size XPC_RP_VARS_SIZE.
*/
static enum xp_retval
-xpc_get_remote_vars_sn2(u64 remote_vars_pa, struct xpc_vars_sn2 *remote_vars)
+xpc_get_remote_vars_sn2(unsigned long remote_vars_pa,
+ struct xpc_vars_sn2 *remote_vars)
{
enum xp_retval ret;
return xpVarsNotSet;
/* pull over the cross partition variables */
- ret = xp_remote_memcpy(remote_vars, (void *)remote_vars_pa,
+ ret = xp_remote_memcpy(xp_pa(remote_vars), remote_vars_pa,
XPC_RP_VARS_SIZE);
if (ret != xpSuccess)
return ret;
}
static void
-xpc_initiate_partition_activation_sn2(struct xpc_rsvd_page *remote_rp,
- u64 remote_rp_pa, int nasid)
+xpc_request_partition_activation_sn2(struct xpc_rsvd_page *remote_rp,
+ unsigned long remote_rp_pa, int nasid)
+{
+ xpc_send_local_activate_IRQ_sn2(nasid);
+}
+
+static void
+xpc_request_partition_reactivation_sn2(struct xpc_partition *part)
+{
+ xpc_send_local_activate_IRQ_sn2(part->sn.sn2.activate_IRQ_nasid);
+}
+
+static void
+xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
+{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+ unsigned long irq_flags;
+ struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
+ sizeof(struct amo)));
+
+ 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,
+ BIT(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 IRQs 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));
+
+ local_irq_restore(irq_flags);
+
+ /*
+ * Send activate IRQ to get other side to see that we've set our
+ * bit in their deactivate request amo.
+ */
+ xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
+ cnodeid_to_nasid(0),
+ part_sn2->activate_IRQ_nasid,
+ part_sn2->activate_IRQ_phys_cpuid);
+}
+
+static void
+xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
{
- xpc_IPI_send_local_activate(nasid);
+ unsigned long irq_flags;
+ struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
+ sizeof(struct amo)));
+
+ 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,
+ ~BIT(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 IRQs 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));
+
+ local_irq_restore(irq_flags);
+}
+
+static int
+xpc_partition_deactivation_requested_sn2(short partid)
+{
+ struct amo *amo = xpc_vars_sn2->amos_page +
+ XPC_DEACTIVATE_REQUEST_AMO_SN2;
+
+ /* our partition's amo variable ANDed with partid mask */
+ return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
+ BIT(partid)) != 0;
}
/*
*/
static void
xpc_update_partition_info_sn2(struct xpc_partition *part, u8 remote_rp_version,
- struct timespec *remote_rp_stamp,
- u64 remote_rp_pa, u64 remote_vars_pa,
+ unsigned long *remote_rp_ts_jiffies,
+ unsigned long remote_rp_pa,
+ unsigned long remote_vars_pa,
struct xpc_vars_sn2 *remote_vars)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+
part->remote_rp_version = remote_rp_version;
dev_dbg(xpc_part, " remote_rp_version = 0x%016x\n",
part->remote_rp_version);
- part->remote_rp_stamp = *remote_rp_stamp;
- dev_dbg(xpc_part, " remote_rp_stamp (tv_sec = 0x%lx tv_nsec = 0x%lx\n",
- part->remote_rp_stamp.tv_sec, part->remote_rp_stamp.tv_nsec);
+ part->remote_rp_ts_jiffies = *remote_rp_ts_jiffies;
+ dev_dbg(xpc_part, " remote_rp_ts_jiffies = 0x%016lx\n",
+ part->remote_rp_ts_jiffies);
part->remote_rp_pa = remote_rp_pa;
dev_dbg(xpc_part, " remote_rp_pa = 0x%016lx\n", part->remote_rp_pa);
- part->remote_vars_pa = remote_vars_pa;
+ part_sn2->remote_vars_pa = remote_vars_pa;
dev_dbg(xpc_part, " remote_vars_pa = 0x%016lx\n",
- part->remote_vars_pa);
+ part_sn2->remote_vars_pa);
part->last_heartbeat = remote_vars->heartbeat;
dev_dbg(xpc_part, " last_heartbeat = 0x%016lx\n",
part->last_heartbeat);
- part->remote_vars_part_pa = remote_vars->vars_part_pa;
+ part_sn2->remote_vars_part_pa = remote_vars->vars_part_pa;
dev_dbg(xpc_part, " remote_vars_part_pa = 0x%016lx\n",
- part->remote_vars_part_pa);
+ part_sn2->remote_vars_part_pa);
- part->remote_act_nasid = remote_vars->act_nasid;
- dev_dbg(xpc_part, " remote_act_nasid = 0x%x\n",
- part->remote_act_nasid);
+ part_sn2->activate_IRQ_nasid = remote_vars->activate_IRQ_nasid;
+ dev_dbg(xpc_part, " activate_IRQ_nasid = 0x%x\n",
+ part_sn2->activate_IRQ_nasid);
- part->remote_act_phys_cpuid = remote_vars->act_phys_cpuid;
- dev_dbg(xpc_part, " remote_act_phys_cpuid = 0x%x\n",
- part->remote_act_phys_cpuid);
+ part_sn2->activate_IRQ_phys_cpuid =
+ remote_vars->activate_IRQ_phys_cpuid;
+ dev_dbg(xpc_part, " activate_IRQ_phys_cpuid = 0x%x\n",
+ part_sn2->activate_IRQ_phys_cpuid);
- part->remote_amos_page_pa = remote_vars->amos_page_pa;
+ part_sn2->remote_amos_page_pa = remote_vars->amos_page_pa;
dev_dbg(xpc_part, " remote_amos_page_pa = 0x%lx\n",
- part->remote_amos_page_pa);
+ part_sn2->remote_amos_page_pa);
- part->remote_vars_version = remote_vars->version;
+ part_sn2->remote_vars_version = remote_vars->version;
dev_dbg(xpc_part, " remote_vars_version = 0x%x\n",
- part->remote_vars_version);
+ part_sn2->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
- * deactivated.
+ * Prior code has determined the nasid which generated a activate IRQ.
+ * Inspect that nasid to determine if its partition needs to be activated
+ * or deactivated.
*
- * A partition is consider "awaiting activation" if our partition
+ * A partition is considered "awaiting activation" if our partition
* flags indicate it is not active and it has a heartbeat. A
* partition is considered "awaiting deactivation" if our partition
* flags indicate it is active but it has no heartbeat or it is not
* initialized reserved page.
*/
static void
-xpc_identify_act_IRQ_req_sn2(int nasid)
+xpc_identify_activate_IRQ_req_sn2(int nasid)
{
struct xpc_rsvd_page *remote_rp;
struct xpc_vars_sn2 *remote_vars;
- u64 remote_rp_pa;
- u64 remote_vars_pa;
+ unsigned long remote_rp_pa;
+ unsigned long remote_vars_pa;
int remote_rp_version;
int reactivate = 0;
- int stamp_diff;
- struct timespec remote_rp_stamp = { 0, 0 }; /*>>> ZERO_STAMP */
+ unsigned long remote_rp_ts_jiffies = 0;
short partid;
struct xpc_partition *part;
+ struct xpc_partition_sn2 *part_sn2;
enum xp_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_sn2;
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
if (ret != xpSuccess) {
remote_vars_pa = remote_rp->sn.vars_pa;
remote_rp_version = remote_rp->version;
- if (XPC_SUPPORTS_RP_STAMP(remote_rp_version))
- remote_rp_stamp = remote_rp->stamp;
+ remote_rp_ts_jiffies = remote_rp->ts_jiffies;
partid = remote_rp->SAL_partid;
part = &xpc_partitions[partid];
+ part_sn2 = &part->sn.sn2;
/* pull over the cross partition variables */
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
ret = xpc_get_remote_vars_sn2(remote_vars_pa, remote_vars);
if (ret != xpSuccess) {
-
dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
"which sent interrupt, reason=%d\n", nasid, ret);
return;
}
- part->act_IRQ_rcvd++;
+ part->activate_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->activate_IRQ_rcvd,
remote_vars->heartbeat, remote_vars->heartbeating_to_mask[0]);
if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_AS_INACTIVE) {
xpc_update_partition_info_sn2(part, remote_rp_version,
- &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)) {
- /*
- * Other side is waiting on us to disengage,
- * even though we already have.
- */
- return;
- }
+ &remote_rp_ts_jiffies,
+ remote_rp_pa, remote_vars_pa,
+ remote_vars);
- } else {
- /* other side doesn't support disengage requests */
- xpc_clear_partition_disengage_request(1UL << partid);
+ if (xpc_partition_deactivation_requested_sn2(partid)) {
+ /*
+ * Other side is waiting on us to deactivate even though
+ * we already have.
+ */
+ return;
}
xpc_activate_partition(part);
}
DBUG_ON(part->remote_rp_version == 0);
- DBUG_ON(part->remote_vars_version == 0);
-
- if (!XPC_SUPPORTS_RP_STAMP(part->remote_rp_version)) {
- DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(part->
- remote_vars_version));
-
- if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
- DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
- 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->heartbeating_to_mask)) {
- /* doesn't look that way, so ignore the IPI */
- return;
- }
- }
+ DBUG_ON(part_sn2->remote_vars_version == 0);
- /*
- * Other side rebooted and previous XPC didn't support the
- * disengage request, so we don't need to do anything special.
- */
-
- xpc_update_partition_info_sn2(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
- part->reactivate_nasid = nasid;
- XPC_DEACTIVATE_PARTITION(part, xpReactivating);
- return;
- }
+ if (remote_rp_ts_jiffies != part->remote_rp_ts_jiffies) {
- DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version));
+ /* the other side rebooted */
- if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
- DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->version));
-
- /*
- * Other side rebooted and previous XPC did support the
- * disengage request, but the new one doesn't.
- */
-
- xpc_clear_partition_engaged(1UL << partid);
- xpc_clear_partition_disengage_request(1UL << partid);
+ DBUG_ON(xpc_partition_engaged_sn2(partid));
+ DBUG_ON(xpc_partition_deactivation_requested_sn2(partid));
xpc_update_partition_info_sn2(part, remote_rp_version,
- &remote_rp_stamp, remote_rp_pa,
- remote_vars_pa, remote_vars);
+ &remote_rp_ts_jiffies,
+ 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);
- if (stamp_diff != 0) {
- DBUG_ON(stamp_diff >= 0);
-
- /*
- * Other side rebooted and the previous XPC did support
- * the disengage request, as does the new one.
- */
-
- DBUG_ON(xpc_partition_engaged(1UL << partid));
- DBUG_ON(xpc_partition_disengage_requested(1UL <<
- partid));
-
- xpc_update_partition_info_sn2(part, remote_rp_version,
- &remote_rp_stamp,
- remote_rp_pa,
- remote_vars_pa,
- remote_vars);
- reactivate = 1;
- }
}
- if (part->disengage_request_timeout > 0 &&
- !xpc_partition_disengaged(part)) {
+ if (part->disengage_timeout > 0 && !xpc_partition_disengaged(part)) {
/* still waiting on other side to disengage from us */
return;
}
- if (reactivate) {
- part->reactivate_nasid = nasid;
+ if (reactivate)
XPC_DEACTIVATE_PARTITION(part, xpReactivating);
-
- } else if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version) &&
- xpc_partition_disengage_requested(1UL << partid)) {
+ else if (xpc_partition_deactivation_requested_sn2(partid))
XPC_DEACTIVATE_PARTITION(part, xpOtherGoingDown);
- }
}
/*
- * Loop through the activation AMO variables and process any bits
+ * Loop through the activation amo variables and process any bits
* which are set. Each bit indicates a nasid sending a partition
* activation or deactivation request.
*
* Return #of IRQs detected.
*/
int
-xpc_identify_act_IRQ_sender_sn2(void)
+xpc_identify_activate_IRQ_sender_sn2(void)
{
- int word, bit;
- u64 nasid_mask;
+ int l;
+ int b;
+ unsigned long nasid_mask_long;
u64 nasid; /* remote nasid */
int n_IRQs_detected = 0;
- AMO_t *act_amos;
+ struct amo *act_amos;
- act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
+ act_amos = xpc_vars_sn2->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
- /* scan through act AMO variable looking for non-zero entries */
- for (word = 0; word < xp_nasid_mask_words; word++) {
+ /* scan through activate amo variables looking for non-zero entries */
+ for (l = 0; l < xpc_nasid_mask_nlongs; l++) {
if (xpc_exiting)
break;
- nasid_mask = xpc_IPI_receive_sn2(&act_amos[word]);
- if (nasid_mask == 0) {
- /* no IRQs from nasids in this variable */
+ nasid_mask_long = xpc_receive_IRQ_amo_sn2(&act_amos[l]);
+
+ b = find_first_bit(&nasid_mask_long, BITS_PER_LONG);
+ if (b >= BITS_PER_LONG) {
+ /* no IRQs from nasids in this amo variable */
continue;
}
- dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
- nasid_mask);
+ dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", l,
+ nasid_mask_long);
/*
* If this nasid has been added to the machine since
* remote nasid in our reserved pages machine mask.
* This is used in the event of module reload.
*/
- xpc_mach_nasids[word] |= nasid_mask;
+ xpc_mach_nasids[l] |= nasid_mask_long;
/* locate the nasid(s) which sent interrupts */
- for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
- if (nasid_mask & (1UL << bit)) {
- n_IRQs_detected++;
- nasid = XPC_NASID_FROM_W_B(word, bit);
- dev_dbg(xpc_part, "interrupt from nasid %ld\n",
- nasid);
- xpc_identify_act_IRQ_req_sn2(nasid);
- }
- }
+ do {
+ n_IRQs_detected++;
+ nasid = (l * BITS_PER_LONG + b) * 2;
+ dev_dbg(xpc_part, "interrupt from nasid %ld\n", nasid);
+ xpc_identify_activate_IRQ_req_sn2(nasid);
+
+ b = find_next_bit(&nasid_mask_long, BITS_PER_LONG,
+ b + 1);
+ } while (b < BITS_PER_LONG);
}
return n_IRQs_detected;
}
static void
-xpc_process_act_IRQ_rcvd_sn2(int n_IRQs_expected)
+xpc_process_activate_IRQ_rcvd_sn2(void)
{
+ unsigned long irq_flags;
+ int n_IRQs_expected;
int n_IRQs_detected;
- n_IRQs_detected = xpc_identify_act_IRQ_sender_sn2();
+ DBUG_ON(xpc_activate_IRQ_rcvd == 0);
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ n_IRQs_expected = xpc_activate_IRQ_rcvd;
+ xpc_activate_IRQ_rcvd = 0;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) {
- /* retry once to help avoid missing AMO */
- (void)xpc_identify_act_IRQ_sender_sn2();
+ /* retry once to help avoid missing amo */
+ (void)xpc_identify_activate_IRQ_sender_sn2();
}
}
/*
- * Setup the infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Setup the channel structures that are sn2 specific.
*/
static enum xp_retval
-xpc_setup_infrastructure_sn2(struct xpc_partition *part)
+xpc_setup_ch_structures_sn_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+ struct xpc_channel_sn2 *ch_sn2;
enum xp_retval retval;
int ret;
int cpuid;
int ch_number;
- struct xpc_channel *ch;
struct timer_list *timer;
short partid = XPC_PARTID(part);
- /*
- * Allocate all of the channel structures as a contiguous chunk of
- * memory.
- */
- DBUG_ON(part->channels != NULL);
- part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_MAX_NCHANNELS,
- GFP_KERNEL);
- if (part->channels == NULL) {
- dev_err(xpc_chan, "can't get memory for channels\n");
- return xpNoMemory;
- }
-
/* allocate all the required GET/PUT values */
- part->local_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
- GFP_KERNEL,
- &part->local_GPs_base);
- if (part->local_GPs == NULL) {
+ part_sn2->local_GPs =
+ xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
+ &part_sn2->local_GPs_base);
+ if (part_sn2->local_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for local get/put "
"values\n");
- retval = xpNoMemory;
- goto out_1;
+ return xpNoMemory;
}
- part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
- GFP_KERNEL,
- &part->
- remote_GPs_base);
- if (part->remote_GPs == NULL) {
+ part_sn2->remote_GPs =
+ xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
+ &part_sn2->remote_GPs_base);
+ if (part_sn2->remote_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for remote get/put "
"values\n");
retval = xpNoMemory;
- goto out_2;
+ goto out_1;
}
- part->remote_GPs_pa = 0;
+ part_sn2->remote_GPs_pa = 0;
/* 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);
- if (part->local_openclose_args == NULL) {
+ part_sn2->local_openclose_args =
+ xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
+ GFP_KERNEL, &part_sn2->
+ local_openclose_args_base);
+ if (part_sn2->local_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for local connect args\n");
retval = xpNoMemory;
- goto out_3;
- }
-
- part->remote_openclose_args =
- xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
- &part->remote_openclose_args_base);
- if (part->remote_openclose_args == NULL) {
- dev_err(xpc_chan, "can't get memory for remote connect args\n");
- retval = xpNoMemory;
- goto out_4;
+ goto out_2;
}
- part->remote_openclose_args_pa = 0;
+ part_sn2->remote_openclose_args_pa = 0;
- part->local_IPI_amo_va = xpc_IPI_init_sn2(partid);
- part->local_IPI_amo = 0;
- spin_lock_init(&part->IPI_lock);
+ part_sn2->local_chctl_amo_va = xpc_init_IRQ_amo_sn2(partid);
- part->remote_IPI_nasid = 0;
- part->remote_IPI_phys_cpuid = 0;
- part->remote_IPI_amo_va = NULL;
+ part_sn2->notify_IRQ_nasid = 0;
+ part_sn2->notify_IRQ_phys_cpuid = 0;
+ part_sn2->remote_chctl_amo_va = NULL;
- atomic_set(&part->channel_mgr_requests, 1);
- init_waitqueue_head(&part->channel_mgr_wq);
-
- sprintf(part->IPI_owner, "xpc%02d", partid);
- ret = request_irq(SGI_XPC_NOTIFY, xpc_notify_IRQ_handler, IRQF_SHARED,
- part->IPI_owner, (void *)(u64)partid);
+ sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid);
+ ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2,
+ IRQF_SHARED, part_sn2->notify_IRQ_owner,
+ (void *)(u64)partid);
if (ret != 0) {
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
"errno=%d\n", -ret);
retval = xpLackOfResources;
- goto out_5;
+ goto out_3;
}
- /* Setup a timer to check for dropped IPIs */
- timer = &part->dropped_IPI_timer;
+ /* Setup a timer to check for dropped notify IRQs */
+ timer = &part_sn2->dropped_notify_IRQ_timer;
init_timer(timer);
- timer->function = (void (*)(unsigned long))xpc_dropped_IPI_check;
+ timer->function =
+ (void (*)(unsigned long))xpc_check_for_dropped_notify_IRQ_sn2;
timer->data = (unsigned long)part;
- timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT_INTERVAL;
+ timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
add_timer(timer);
- part->nchannels = XPC_MAX_NCHANNELS;
-
- atomic_set(&part->nchannels_active, 0);
- atomic_set(&part->nchannels_engaged, 0);
-
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
- ch = &part->channels[ch_number];
+ ch_sn2 = &part->channels[ch_number].sn.sn2;
- ch->partid = partid;
- ch->number = ch_number;
- ch->flags = XPC_C_DISCONNECTED;
+ ch_sn2->local_GP = &part_sn2->local_GPs[ch_number];
+ ch_sn2->local_openclose_args =
+ &part_sn2->local_openclose_args[ch_number];
- ch->local_GP = &part->local_GPs[ch_number];
- ch->local_openclose_args =
- &part->local_openclose_args[ch_number];
-
- atomic_set(&ch->kthreads_assigned, 0);
- atomic_set(&ch->kthreads_idle, 0);
- atomic_set(&ch->kthreads_active, 0);
-
- atomic_set(&ch->references, 0);
- atomic_set(&ch->n_to_notify, 0);
-
- spin_lock_init(&ch->lock);
- mutex_init(&ch->msg_to_pull_mutex);
- init_completion(&ch->wdisconnect_wait);
-
- atomic_set(&ch->n_on_msg_allocate_wq, 0);
- init_waitqueue_head(&ch->msg_allocate_wq);
- init_waitqueue_head(&ch->idle_wq);
+ mutex_init(&ch_sn2->msg_to_pull_mutex);
}
- /*
- * With the setting of the partition setup_state to XPC_P_SETUP, we're
- * declaring that this partition is ready to go.
- */
- part->setup_state = XPC_P_SETUP;
-
/*
* Setup the per partition specific variables required by the
* remote partition to establish channel connections with us.
* The setting of the magic # indicates that these per partition
* specific variables are ready to be used.
*/
- xpc_vars_part[partid].GPs_pa = __pa(part->local_GPs);
- xpc_vars_part[partid].openclose_args_pa =
- __pa(part->local_openclose_args);
- xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
+ xpc_vars_part_sn2[partid].GPs_pa = xp_pa(part_sn2->local_GPs);
+ xpc_vars_part_sn2[partid].openclose_args_pa =
+ xp_pa(part_sn2->local_openclose_args);
+ xpc_vars_part_sn2[partid].chctl_amo_pa =
+ xp_pa(part_sn2->local_chctl_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
- xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid);
- xpc_vars_part[partid].IPI_phys_cpuid = cpu_physical_id(cpuid);
- xpc_vars_part[partid].nchannels = part->nchannels;
- xpc_vars_part[partid].magic = XPC_VP_MAGIC1;
+ xpc_vars_part_sn2[partid].notify_IRQ_nasid = cpuid_to_nasid(cpuid);
+ xpc_vars_part_sn2[partid].notify_IRQ_phys_cpuid =
+ cpu_physical_id(cpuid);
+ xpc_vars_part_sn2[partid].nchannels = part->nchannels;
+ xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1_SN2;
return xpSuccess;
- /* setup of infrastructure failed */
-out_5:
- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
-out_4:
- kfree(part->local_openclose_args_base);
- part->local_openclose_args = NULL;
+ /* setup of ch structures failed */
out_3:
- kfree(part->remote_GPs_base);
- part->remote_GPs = NULL;
+ kfree(part_sn2->local_openclose_args_base);
+ part_sn2->local_openclose_args = NULL;
out_2:
- kfree(part->local_GPs_base);
- part->local_GPs = NULL;
+ kfree(part_sn2->remote_GPs_base);
+ part_sn2->remote_GPs = NULL;
out_1:
- kfree(part->channels);
- part->channels = NULL;
+ kfree(part_sn2->local_GPs_base);
+ part_sn2->local_GPs = NULL;
return retval;
}
/*
- * Teardown the infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Teardown the channel structures that are sn2 specific.
*/
static void
-xpc_teardown_infrastructure_sn2(struct xpc_partition *part)
+xpc_teardown_ch_structures_sn_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
short partid = XPC_PARTID(part);
/*
- * We start off by making this partition inaccessible to local
- * processes by marking it as no longer setup. Then we make it
- * inaccessible to remote processes by clearing the XPC per partition
- * specific variable's magic # (which indicates that these variables
- * are no longer valid) and by ignoring all XPC notify IPIs sent to
- * this partition.
- */
-
- DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
- DBUG_ON(atomic_read(&part->nchannels_active) != 0);
- DBUG_ON(part->setup_state != XPC_P_SETUP);
- part->setup_state = XPC_P_WTEARDOWN;
-
- xpc_vars_part[partid].magic = 0;
-
- free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
-
- /*
- * Before proceeding with the teardown we have to wait until all
- * existing references cease.
+ * Indicate that the variables specific to the remote partition are no
+ * longer available for its use.
*/
- wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
-
- /* now we can begin tearing down the infrastructure */
-
- part->setup_state = XPC_P_TORNDOWN;
+ xpc_vars_part_sn2[partid].magic = 0;
/* in case we've still got outstanding timers registered... */
- del_timer_sync(&part->dropped_IPI_timer);
+ del_timer_sync(&part_sn2->dropped_notify_IRQ_timer);
+ free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
- kfree(part->local_openclose_args_base);
- part->local_openclose_args = NULL;
- kfree(part->remote_GPs_base);
- part->remote_GPs = NULL;
- kfree(part->local_GPs_base);
- part->local_GPs = NULL;
- kfree(part->channels);
- part->channels = NULL;
- part->local_IPI_amo_va = NULL;
+ kfree(part_sn2->local_openclose_args_base);
+ part_sn2->local_openclose_args = NULL;
+ kfree(part_sn2->remote_GPs_base);
+ part_sn2->remote_GPs = NULL;
+ kfree(part_sn2->local_GPs_base);
+ part_sn2->local_GPs = NULL;
+ part_sn2->local_chctl_amo_va = NULL;
}
/*
* Create a wrapper that hides the underlying mechanism for pulling a cacheline
* (or multiple cachelines) from a remote partition.
*
- * src must be a cacheline aligned physical address on the remote partition.
+ * src_pa must be a cacheline aligned physical address on the remote partition.
* dst must be a cacheline aligned virtual address on this partition.
* cnt must be cacheline sized
*/
-/* >>> Replace this function by call to xp_remote_memcpy() or bte_copy()? */
+/* ??? Replace this function by call to xp_remote_memcpy() or bte_copy()? */
static enum xp_retval
xpc_pull_remote_cachelines_sn2(struct xpc_partition *part, void *dst,
- const void *src, size_t cnt)
+ const unsigned long src_pa, size_t cnt)
{
enum xp_retval ret;
- DBUG_ON((u64)src != L1_CACHE_ALIGN((u64)src));
- DBUG_ON((u64)dst != L1_CACHE_ALIGN((u64)dst));
+ DBUG_ON(src_pa != L1_CACHE_ALIGN(src_pa));
+ DBUG_ON((unsigned long)dst != L1_CACHE_ALIGN((unsigned long)dst));
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
- if (part->act_state == XPC_P_DEACTIVATING)
+ if (part->act_state == XPC_P_AS_DEACTIVATING)
return part->reason;
- ret = xp_remote_memcpy(dst, src, cnt);
+ ret = xp_remote_memcpy(xp_pa(dst), src_pa, cnt);
if (ret != xpSuccess) {
dev_dbg(xpc_chan, "xp_remote_memcpy() from partition %d failed,"
" ret=%d\n", XPC_PARTID(part), ret);
static enum xp_retval
xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
u8 buffer[L1_CACHE_BYTES * 2];
struct xpc_vars_part_sn2 *pulled_entry_cacheline =
(struct xpc_vars_part_sn2 *)L1_CACHE_ALIGN((u64)buffer);
struct xpc_vars_part_sn2 *pulled_entry;
- u64 remote_entry_cacheline_pa, remote_entry_pa;
+ unsigned long remote_entry_cacheline_pa;
+ unsigned long remote_entry_pa;
short partid = XPC_PARTID(part);
enum xp_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));
+ DBUG_ON(part_sn2->remote_vars_part_pa !=
+ L1_CACHE_ALIGN(part_sn2->remote_vars_part_pa));
DBUG_ON(sizeof(struct xpc_vars_part_sn2) != L1_CACHE_BYTES / 2);
- remote_entry_pa = part->remote_vars_part_pa +
+ remote_entry_pa = part_sn2->remote_vars_part_pa +
sn_partition_id * sizeof(struct xpc_vars_part_sn2);
remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
(L1_CACHE_BYTES - 1)));
ret = xpc_pull_remote_cachelines_sn2(part, pulled_entry_cacheline,
- (void *)remote_entry_cacheline_pa,
+ remote_entry_cacheline_pa,
L1_CACHE_BYTES);
if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
/* see if they've been set up yet */
- if (pulled_entry->magic != XPC_VP_MAGIC1 &&
- pulled_entry->magic != XPC_VP_MAGIC2) {
+ if (pulled_entry->magic != XPC_VP_MAGIC1_SN2 &&
+ pulled_entry->magic != XPC_VP_MAGIC2_SN2) {
if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
return xpRetry;
}
- if (xpc_vars_part[partid].magic == XPC_VP_MAGIC1) {
+ if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1_SN2) {
/* validate the variables */
if (pulled_entry->GPs_pa == 0 ||
pulled_entry->openclose_args_pa == 0 ||
- pulled_entry->IPI_amo_pa == 0) {
+ pulled_entry->chctl_amo_pa == 0) {
dev_err(xpc_chan, "partition %d's XPC vars_part for "
"partition %d are not valid\n", partid,
/* the variables we imported look to be valid */
- part->remote_GPs_pa = pulled_entry->GPs_pa;
- part->remote_openclose_args_pa =
+ part_sn2->remote_GPs_pa = pulled_entry->GPs_pa;
+ part_sn2->remote_openclose_args_pa =
pulled_entry->openclose_args_pa;
- part->remote_IPI_amo_va =
- (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;
+ part_sn2->remote_chctl_amo_va =
+ (struct amo *)__va(pulled_entry->chctl_amo_pa);
+ part_sn2->notify_IRQ_nasid = pulled_entry->notify_IRQ_nasid;
+ part_sn2->notify_IRQ_phys_cpuid =
+ pulled_entry->notify_IRQ_phys_cpuid;
if (part->nchannels > pulled_entry->nchannels)
part->nchannels = pulled_entry->nchannels;
/* let the other side know that we've pulled their variables */
- xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
+ xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2_SN2;
}
- if (pulled_entry->magic == XPC_VP_MAGIC1)
+ if (pulled_entry->magic == XPC_VP_MAGIC1_SN2)
return xpRetry;
return xpSuccess;
static enum xp_retval
xpc_make_first_contact_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
enum xp_retval ret;
/*
- * Register the remote partition's AMOs with SAL so it can handle
+ * Register the remote partition's amos with SAL so it can handle
* and cleanup errors within that address range should the remote
* partition go down. We don't unregister this range because it is
* difficult to tell when outstanding writes to the remote partition
* we should get the same page for remote_amos_page_pa after module
* reloads and system reboots.
*/
- if (sn_register_xp_addr_region(part->remote_amos_page_pa,
+ if (sn_register_xp_addr_region(part_sn2->remote_amos_page_pa,
PAGE_SIZE, 1) < 0) {
dev_warn(xpc_part, "xpc_activating(%d) failed to register "
"xp_addr region\n", XPC_PARTID(part));
return ret;
}
- xpc_IPI_send_activated(part);
+ /*
+ * Send activate IRQ to get other side to activate if they've not
+ * already begun to do so.
+ */
+ xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
+ cnodeid_to_nasid(0),
+ part_sn2->activate_IRQ_nasid,
+ part_sn2->activate_IRQ_phys_cpuid);
while ((ret = xpc_pull_remote_vars_part_sn2(part)) != xpSuccess) {
if (ret != xpRetry) {
/* wait a 1/4 of a second or so */
(void)msleep_interruptible(250);
- if (part->act_state == XPC_P_DEACTIVATING)
+ if (part->act_state == XPC_P_AS_DEACTIVATING)
return part->reason;
}
}
/*
- * Get the IPI flags and pull the openclose args and/or remote GPs as needed.
+ * Get the chctl flags and pull the openclose args and/or remote GPs as needed.
*/
static u64
-xpc_get_IPI_flags_sn2(struct xpc_partition *part)
+xpc_get_chctl_all_flags_sn2(struct xpc_partition *part)
{
+ struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
- u64 IPI_amo;
+ union xpc_channel_ctl_flags chctl;
enum xp_retval ret;
/*
- * See if there are any IPI flags to be handled.
+ * See if there are any chctl flags to be handled.
*/
- spin_lock_irqsave(&part->IPI_lock, irq_flags);
- IPI_amo = part->local_IPI_amo;
- if (IPI_amo != 0)
- part->local_IPI_amo = 0;
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ chctl = part->chctl;
+ if (chctl.all_flags != 0)
+ part->chctl.all_flags = 0;
- spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
- if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
- ret = xpc_pull_remote_cachelines_sn2(part,
- part->remote_openclose_args,
- (void *)part->
+ if (xpc_any_openclose_chctl_flags_set(&chctl)) {
+ ret = xpc_pull_remote_cachelines_sn2(part, part->
+ remote_openclose_args,
+ part_sn2->
remote_openclose_args_pa,
XPC_OPENCLOSE_ARGS_SIZE);
if (ret != xpSuccess) {
"partition %d, ret=%d\n", XPC_PARTID(part),
ret);
- /* don't bother processing IPIs anymore */
- IPI_amo = 0;
+ /* don't bother processing chctl flags anymore */
+ chctl.all_flags = 0;
}
}
- if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) {
- ret = xpc_pull_remote_cachelines_sn2(part, part->remote_GPs,
- (void *)part->remote_GPs_pa,
+ if (xpc_any_msg_chctl_flags_set(&chctl)) {
+ ret = xpc_pull_remote_cachelines_sn2(part, part_sn2->remote_GPs,
+ part_sn2->remote_GPs_pa,
XPC_GP_SIZE);
if (ret != xpSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);
dev_dbg(xpc_chan, "failed to pull GPs from partition "
"%d, ret=%d\n", XPC_PARTID(part), ret);
- /* don't bother processing IPIs anymore */
- IPI_amo = 0;
+ /* don't bother processing chctl flags anymore */
+ chctl.all_flags = 0;
+ }
+ }
+
+ return chctl.all_flags;
+}
+
+/*
+ * Allocate the local message queue and the notify queue.
+ */
+static enum xp_retval
+xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ unsigned long irq_flags;
+ int nentries;
+ size_t nbytes;
+
+ for (nentries = ch->local_nentries; nentries > 0; nentries--) {
+
+ nbytes = nentries * ch->entry_size;
+ ch_sn2->local_msgqueue =
+ xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
+ &ch_sn2->local_msgqueue_base);
+ if (ch_sn2->local_msgqueue == NULL)
+ continue;
+
+ nbytes = nentries * sizeof(struct xpc_notify_sn2);
+ ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
+ if (ch_sn2->notify_queue == NULL) {
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
+ continue;
+ }
+
+ spin_lock_irqsave(&ch->lock, irq_flags);
+ if (nentries < ch->local_nentries) {
+ dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, "
+ "partid=%d, channel=%d\n", nentries,
+ ch->local_nentries, ch->partid, ch->number);
+
+ ch->local_nentries = nentries;
+ }
+ spin_unlock_irqrestore(&ch->lock, irq_flags);
+ return xpSuccess;
+ }
+
+ dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
+ "queue, partid=%d, channel=%d\n", ch->partid, ch->number);
+ return xpNoMemory;
+}
+
+/*
+ * Allocate the cached remote message queue.
+ */
+static enum xp_retval
+xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ unsigned long irq_flags;
+ int nentries;
+ size_t nbytes;
+
+ DBUG_ON(ch->remote_nentries <= 0);
+
+ for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
+
+ nbytes = nentries * ch->entry_size;
+ ch_sn2->remote_msgqueue =
+ xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
+ remote_msgqueue_base);
+ if (ch_sn2->remote_msgqueue == NULL)
+ continue;
+
+ spin_lock_irqsave(&ch->lock, irq_flags);
+ if (nentries < ch->remote_nentries) {
+ dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, "
+ "partid=%d, channel=%d\n", nentries,
+ ch->remote_nentries, ch->partid, ch->number);
+
+ ch->remote_nentries = nentries;
+ }
+ spin_unlock_irqrestore(&ch->lock, irq_flags);
+ return xpSuccess;
+ }
+
+ dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
+ "partid=%d, channel=%d\n", ch->partid, ch->number);
+ return xpNoMemory;
+}
+
+/*
+ * Allocate message queues and other stuff associated with a channel.
+ *
+ * Note: Assumes all of the channel sizes are filled in.
+ */
+static enum xp_retval
+xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ enum xp_retval ret;
+
+ DBUG_ON(ch->flags & XPC_C_SETUP);
+
+ ret = xpc_allocate_local_msgqueue_sn2(ch);
+ if (ret == xpSuccess) {
+
+ ret = xpc_allocate_remote_msgqueue_sn2(ch);
+ if (ret != xpSuccess) {
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
+ kfree(ch_sn2->notify_queue);
+ ch_sn2->notify_queue = NULL;
+ }
+ }
+ return ret;
+}
+
+/*
+ * Free up message queues and other stuff that were allocated for the specified
+ * channel.
+ */
+static void
+xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+
+ DBUG_ON(!spin_is_locked(&ch->lock));
+
+ ch_sn2->remote_msgqueue_pa = 0;
+
+ ch_sn2->local_GP->get = 0;
+ ch_sn2->local_GP->put = 0;
+ ch_sn2->remote_GP.get = 0;
+ ch_sn2->remote_GP.put = 0;
+ ch_sn2->w_local_GP.get = 0;
+ ch_sn2->w_local_GP.put = 0;
+ ch_sn2->w_remote_GP.get = 0;
+ ch_sn2->w_remote_GP.put = 0;
+ ch_sn2->next_msg_to_pull = 0;
+
+ if (ch->flags & XPC_C_SETUP) {
+ dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
+ ch->flags, ch->partid, ch->number);
+
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
+ kfree(ch_sn2->remote_msgqueue_base);
+ ch_sn2->remote_msgqueue = NULL;
+ kfree(ch_sn2->notify_queue);
+ ch_sn2->notify_queue = NULL;
+ }
+}
+
+/*
+ * Notify those who wanted to be notified upon delivery of their message.
+ */
+static void
+xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
+{
+ struct xpc_notify_sn2 *notify;
+ u8 notify_type;
+ s64 get = ch->sn.sn2.w_remote_GP.get - 1;
+
+ while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
+
+ notify = &ch->sn.sn2.notify_queue[get % ch->local_nentries];
+
+ /*
+ * See if the notify entry indicates it was associated with
+ * a message who's sender wants to be notified. It is possible
+ * that it is, but someone else is doing or has done the
+ * notification.
+ */
+ notify_type = notify->type;
+ if (notify_type == 0 ||
+ cmpxchg(¬ify->type, notify_type, 0) != notify_type) {
+ continue;
+ }
+
+ DBUG_ON(notify_type != XPC_N_CALL);
+
+ atomic_dec(&ch->n_to_notify);
+
+ 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);
+
+ notify->func(reason, ch->partid, ch->number,
+ notify->key);
+
+ dev_dbg(xpc_chan, "notify->func() returned, notify=0x%p"
+ " msg_number=%ld partid=%d channel=%d\n",
+ (void *)notify, get, ch->partid, ch->number);
+ }
+ }
+}
+
+static void
+xpc_notify_senders_of_disconnect_sn2(struct xpc_channel *ch)
+{
+ xpc_notify_senders_sn2(ch, ch->reason, ch->sn.sn2.w_local_GP.put);
+}
+
+/*
+ * Clear some of the msg flags in the local message queue.
+ */
+static inline void
+xpc_clear_local_msgqueue_flags_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
+ s64 get;
+
+ get = ch_sn2->w_remote_GP.get;
+ do {
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
+ (get % ch->local_nentries) *
+ ch->entry_size);
+ msg->flags = 0;
+ } while (++get < ch_sn2->remote_GP.get);
+}
+
+/*
+ * Clear some of the msg flags in the remote message queue.
+ */
+static inline void
+xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch)
+{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
+ s64 put;
+
+ put = ch_sn2->w_remote_GP.put;
+ do {
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
+ (put % ch->remote_nentries) *
+ ch->entry_size);
+ msg->flags = 0;
+ } while (++put < ch_sn2->remote_GP.put);
+}
+
+static int
+xpc_n_of_deliverable_payloads_sn2(struct xpc_channel *ch)
+{
+ return ch->sn.sn2.w_remote_GP.put - ch->sn.sn2.w_local_GP.get;
+}
+
+static void
+xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
+{
+ struct xpc_channel *ch = &part->channels[ch_number];
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ int npayloads_sent;
+
+ ch_sn2->remote_GP = part->sn.sn2.remote_GPs[ch_number];
+
+ /* See what, if anything, has changed for each connected channel */
+
+ xpc_msgqueue_ref(ch);
+
+ if (ch_sn2->w_remote_GP.get == ch_sn2->remote_GP.get &&
+ ch_sn2->w_remote_GP.put == ch_sn2->remote_GP.put) {
+ /* nothing changed since GPs were last pulled */
+ xpc_msgqueue_deref(ch);
+ return;
+ }
+
+ 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
+ * changed since we last looked at it.)
+ */
+
+ if (ch_sn2->w_remote_GP.get != ch_sn2->remote_GP.get) {
+
+ /*
+ * We need to notify any senders that want to be notified
+ * that their sent messages have been received by their
+ * intended recipients. We need to do this before updating
+ * w_remote_GP.get so that we don't allocate the same message
+ * queue entries prematurely (see xpc_allocate_msg()).
+ */
+ if (atomic_read(&ch->n_to_notify) > 0) {
+ /*
+ * Notify senders that messages sent have been
+ * received and delivered by the other side.
+ */
+ xpc_notify_senders_sn2(ch, xpMsgDelivered,
+ ch_sn2->remote_GP.get);
+ }
+
+ /*
+ * Clear msg->flags in previously sent messages, so that
+ * they're ready for xpc_allocate_msg().
+ */
+ xpc_clear_local_msgqueue_flags_sn2(ch);
+
+ ch_sn2->w_remote_GP.get = ch_sn2->remote_GP.get;
+
+ dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
+ "channel=%d\n", ch_sn2->w_remote_GP.get, ch->partid,
+ ch->number);
+
+ /*
+ * If anyone was waiting for message queue entries to become
+ * available, wake them up.
+ */
+ 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.)
+ */
+
+ if (ch_sn2->w_remote_GP.put != ch_sn2->remote_GP.put) {
+ /*
+ * Clear msg->flags in previously received messages, so that
+ * they're ready for xpc_get_deliverable_payload_sn2().
+ */
+ xpc_clear_remote_msgqueue_flags_sn2(ch);
+
+ ch_sn2->w_remote_GP.put = ch_sn2->remote_GP.put;
+
+ dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
+ "channel=%d\n", ch_sn2->w_remote_GP.put, ch->partid,
+ ch->number);
+
+ npayloads_sent = xpc_n_of_deliverable_payloads_sn2(ch);
+ if (npayloads_sent > 0) {
+ dev_dbg(xpc_chan, "msgs waiting to be copied and "
+ "delivered=%d, partid=%d, channel=%d\n",
+ npayloads_sent, ch->partid, ch->number);
+
+ if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
+ xpc_activate_kthreads(ch, npayloads_sent);
}
}
- return IPI_amo;
+ xpc_msgqueue_deref(ch);
}
-static struct xpc_msg *
+static struct xpc_msg_sn2 *
xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
{
struct xpc_partition *part = &xpc_partitions[ch->partid];
- struct xpc_msg *remote_msg, *msg;
- u32 msg_index, nmsgs;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ unsigned long remote_msg_pa;
+ struct xpc_msg_sn2 *msg;
+ u32 msg_index;
+ u32 nmsgs;
u64 msg_offset;
enum xp_retval ret;
- if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
+ if (mutex_lock_interruptible(&ch_sn2->msg_to_pull_mutex) != 0) {
/* we were interrupted by a signal */
return NULL;
}
- while (get >= ch->next_msg_to_pull) {
+ while (get >= ch_sn2->next_msg_to_pull) {
/* pull as many messages as are ready and able to be pulled */
- msg_index = ch->next_msg_to_pull % ch->remote_nentries;
+ msg_index = ch_sn2->next_msg_to_pull % ch->remote_nentries;
- DBUG_ON(ch->next_msg_to_pull >= ch->w_remote_GP.put);
- nmsgs = ch->w_remote_GP.put - ch->next_msg_to_pull;
+ DBUG_ON(ch_sn2->next_msg_to_pull >= ch_sn2->w_remote_GP.put);
+ nmsgs = ch_sn2->w_remote_GP.put - ch_sn2->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_offset = msg_index * ch->entry_size;
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
+ msg_offset);
+ remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;
- ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg,
- nmsgs * ch->msg_size);
+ ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
+ nmsgs * ch->entry_size);
if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
" msg %ld from partition %d, channel=%d, "
- "ret=%d\n", nmsgs, ch->next_msg_to_pull,
+ "ret=%d\n", nmsgs, ch_sn2->next_msg_to_pull,
ch->partid, ch->number, ret);
XPC_DEACTIVATE_PARTITION(part, ret);
- mutex_unlock(&ch->msg_to_pull_mutex);
+ mutex_unlock(&ch_sn2->msg_to_pull_mutex);
return NULL;
}
- ch->next_msg_to_pull += nmsgs;
+ ch_sn2->next_msg_to_pull += nmsgs;
}
- mutex_unlock(&ch->msg_to_pull_mutex);
+ mutex_unlock(&ch_sn2->msg_to_pull_mutex);
/* 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_offset = (get % ch->remote_nentries) * ch->entry_size;
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue + msg_offset);
return msg;
}
/*
- * Get a message to be delivered.
+ * Get the next deliverable message's payload.
*/
-static struct xpc_msg *
-xpc_get_deliverable_msg_sn2(struct xpc_channel *ch)
+static void *
+xpc_get_deliverable_payload_sn2(struct xpc_channel *ch)
{
- struct xpc_msg *msg = NULL;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
+ void *payload = NULL;
s64 get;
do {
if (ch->flags & XPC_C_DISCONNECTING)
break;
- get = ch->w_local_GP.get;
+ get = ch_sn2->w_local_GP.get;
rmb(); /* guarantee that .get loads before .put */
- if (get == ch->w_remote_GP.put)
+ if (get == ch_sn2->w_remote_GP.put)
break;
/* There are messages waiting to be pulled and delivered.
* to try again for the next one.
*/
- if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
+ if (cmpxchg(&ch_sn2->w_local_GP.get, get, get + 1) == get) {
/* we got the entry referenced by get */
dev_dbg(xpc_chan, "w_local_GP.get changed to %ld, "
msg = xpc_pull_remote_msg_sn2(ch, get);
DBUG_ON(msg != NULL && msg->number != get);
- DBUG_ON(msg != NULL && (msg->flags & XPC_M_DONE));
- DBUG_ON(msg != NULL && !(msg->flags & XPC_M_READY));
+ DBUG_ON(msg != NULL && (msg->flags & XPC_M_SN2_DONE));
+ DBUG_ON(msg != NULL && !(msg->flags & XPC_M_SN2_READY));
+ payload = &msg->payload;
break;
}
} while (1);
- return msg;
+ return payload;
}
/*
* Now we actually send the messages that are ready to be sent by advancing
- * the local message queue's Put value and then send an IPI to the recipient
- * partition.
+ * the local message queue's Put value and then send a chctl msgrequest to the
+ * recipient partition.
*/
static void
xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
{
- struct xpc_msg *msg;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
s64 put = initial_put + 1;
- int send_IPI = 0;
+ int send_msgrequest = 0;
while (1) {
while (1) {
- if (put == ch->w_local_GP.put)
+ if (put == ch_sn2->w_local_GP.put)
break;
- msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
- (put % ch->local_nentries) *
- ch->msg_size);
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
+ local_msgqueue + (put %
+ ch->local_nentries) *
+ ch->entry_size);
- if (!(msg->flags & XPC_M_READY))
+ if (!(msg->flags & XPC_M_SN2_READY))
break;
put++;
break;
}
- if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
+ if (cmpxchg_rel(&ch_sn2->local_GP->put, initial_put, put) !=
initial_put) {
/* someone else beat us to it */
- DBUG_ON(ch->local_GP->put < initial_put);
+ DBUG_ON(ch_sn2->local_GP->put < initial_put);
break;
}
dev_dbg(xpc_chan, "local_GP->put changed to %ld, partid=%d, "
"channel=%d\n", put, ch->partid, ch->number);
- send_IPI = 1;
+ send_msgrequest = 1;
/*
* We need to ensure that the message referenced by
- * local_GP->put is not XPC_M_READY or that local_GP->put
+ * local_GP->put is not XPC_M_SN2_READY or that local_GP->put
* equals w_local_GP.put, so we'll go have a look.
*/
initial_put = put;
}
- if (send_IPI)
- xpc_IPI_send_msgrequest_sn2(ch);
+ if (send_msgrequest)
+ xpc_send_chctl_msgrequest_sn2(ch);
}
/*
*/
static enum xp_retval
xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
- struct xpc_msg **address_of_msg)
+ struct xpc_msg_sn2 **address_of_msg)
{
- struct xpc_msg *msg;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
enum xp_retval ret;
s64 put;
- /* this reference will be dropped in xpc_send_msg_sn2() */
- xpc_msgqueue_ref(ch);
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- xpc_msgqueue_deref(ch);
- return ch->reason;
- }
- if (!(ch->flags & XPC_C_CONNECTED)) {
- xpc_msgqueue_deref(ch);
- return xpNotConnected;
- }
-
/*
* 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 = ch->w_local_GP.put;
+ put = ch_sn2->w_local_GP.put;
rmb(); /* guarantee that .put loads before .get */
- if (put - ch->w_remote_GP.get < ch->local_nentries) {
+ if (put - ch_sn2->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
* 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_sn2->w_local_GP.put, put, put + 1) ==
+ put) {
/* we got the entry referenced by put */
break;
}
* There aren't any available msg entries at this time.
*
* In waiting for a message entry to become available,
- * we set a timeout in case the other side is not
- * sending completion IPIs. This lets us fake an IPI
- * that will cause the IPI handler to fetch the latest
- * GP values as if an IPI was sent by the other side.
+ * we set a timeout in case the other side is not sending
+ * completion interrupts. This lets us fake a notify IRQ
+ * that will cause the notify IRQ handler to fetch the latest
+ * GP values as if an interrupt was sent by the other side.
*/
if (ret == xpTimeout)
- xpc_IPI_send_local_msgrequest_sn2(ch);
+ xpc_send_chctl_local_msgrequest_sn2(ch);
- if (flags & XPC_NOWAIT) {
- xpc_msgqueue_deref(ch);
+ if (flags & XPC_NOWAIT)
return xpNoWait;
- }
ret = xpc_allocate_msg_wait(ch);
- if (ret != xpInterrupted && ret != xpTimeout) {
- xpc_msgqueue_deref(ch);
+ if (ret != xpInterrupted && ret != xpTimeout)
return ret;
- }
}
/* 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_sn2 *)((u64)ch_sn2->local_msgqueue +
+ (put % ch->local_nentries) *
+ ch->entry_size);
DBUG_ON(msg->flags != 0);
msg->number = put;
(void *)msg, msg->number, ch->partid, ch->number);
*address_of_msg = msg;
-
return xpSuccess;
}
/*
* Common code that does the actual sending of the message by advancing the
- * local message queue's Put value and sends an IPI to the partition the
- * message is being sent to.
+ * local message queue's Put value and sends a chctl msgrequest to the
+ * partition the message is being sent to.
*/
static enum xp_retval
-xpc_send_msg_sn2(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
- xpc_notify_func func, void *key)
+xpc_send_payload_sn2(struct xpc_channel *ch, u32 flags, void *payload,
+ u16 payload_size, u8 notify_type, xpc_notify_func func,
+ void *key)
{
enum xp_retval ret = xpSuccess;
- struct xpc_notify *notify = notify;
- s64 put, msg_number = msg->number;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg = msg;
+ struct xpc_notify_sn2 *notify = notify;
+ s64 msg_number;
+ s64 put;
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(msg->flags & XPC_M_READY);
+
+ if (XPC_MSG_SIZE(payload_size) > ch->entry_size)
+ return xpPayloadTooBig;
+
+ xpc_msgqueue_ref(ch);
if (ch->flags & XPC_C_DISCONNECTING) {
- /* drop the reference grabbed in xpc_allocate_msg_sn2() */
- xpc_msgqueue_deref(ch);
- return ch->reason;
+ ret = ch->reason;
+ goto out_1;
}
+ if (!(ch->flags & XPC_C_CONNECTED)) {
+ ret = xpNotConnected;
+ goto out_1;
+ }
+
+ ret = xpc_allocate_msg_sn2(ch, flags, &msg);
+ if (ret != xpSuccess)
+ goto out_1;
+
+ msg_number = msg->number;
if (notify_type != 0) {
/*
* Tell the remote side to send an ACK interrupt when the
* message has been delivered.
*/
- msg->flags |= XPC_M_INTERRUPT;
+ msg->flags |= XPC_M_SN2_INTERRUPT;
atomic_inc(&ch->n_to_notify);
- notify = &ch->notify_queue[msg_number % ch->local_nentries];
+ notify = &ch_sn2->notify_queue[msg_number % ch->local_nentries];
notify->func = func;
notify->key = key;
notify->type = notify_type;
- /* >>> is a mb() needed here? */
+ /* ??? Is a mb() needed here? */
if (ch->flags & XPC_C_DISCONNECTING) {
/*
atomic_dec(&ch->n_to_notify);
ret = ch->reason;
}
-
- /* drop reference grabbed in xpc_allocate_msg_sn2() */
- xpc_msgqueue_deref(ch);
- return ret;
+ goto out_1;
}
}
- msg->flags |= XPC_M_READY;
+ memcpy(&msg->payload, payload, payload_size);
+
+ msg->flags |= XPC_M_SN2_READY;
/*
* The preceding store of msg->flags must occur before the following
- * load of ch->local_GP->put.
+ * load of local_GP->put.
*/
mb();
/* see if the message is next in line to be sent, if so send it */
- put = ch->local_GP->put;
+ put = ch_sn2->local_GP->put;
if (put == msg_number)
xpc_send_msgs_sn2(ch, put);
- /* drop the reference grabbed in xpc_allocate_msg_sn2() */
+out_1:
xpc_msgqueue_deref(ch);
return ret;
}
/*
* Now we actually acknowledge the messages that have been delivered and ack'd
* by advancing the cached remote message queue's Get value and if requested
- * send an IPI to the message sender's partition.
+ * send a chctl msgrequest to the message sender's partition.
+ *
+ * If a message has XPC_M_SN2_INTERRUPT set, send an interrupt to the partition
+ * that sent the message.
*/
static void
xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
{
- struct xpc_msg *msg;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
+ struct xpc_msg_sn2 *msg;
s64 get = initial_get + 1;
- int send_IPI = 0;
+ int send_msgrequest = 0;
while (1) {
while (1) {
- if (get == ch->w_local_GP.get)
+ if (get == ch_sn2->w_local_GP.get)
break;
- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
- (get % ch->remote_nentries) *
- ch->msg_size);
+ msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
+ remote_msgqueue + (get %
+ ch->remote_nentries) *
+ ch->entry_size);
- if (!(msg->flags & XPC_M_DONE))
+ if (!(msg->flags & XPC_M_SN2_DONE))
break;
msg_flags |= msg->flags;
break;
}
- if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
+ if (cmpxchg_rel(&ch_sn2->local_GP->get, initial_get, get) !=
initial_get) {
/* someone else beat us to it */
- DBUG_ON(ch->local_GP->get <= initial_get);
+ DBUG_ON(ch_sn2->local_GP->get <= initial_get);
break;
}
dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, "
"channel=%d\n", get, ch->partid, ch->number);
- send_IPI = (msg_flags & XPC_M_INTERRUPT);
+ send_msgrequest = (msg_flags & XPC_M_SN2_INTERRUPT);
/*
* We need to ensure that the message referenced by
- * local_GP->get is not XPC_M_DONE or that local_GP->get
+ * local_GP->get is not XPC_M_SN2_DONE or that local_GP->get
* equals w_local_GP.get, so we'll go have a look.
*/
initial_get = get;
}
- if (send_IPI)
- xpc_IPI_send_msgrequest_sn2(ch);
+ if (send_msgrequest)
+ xpc_send_chctl_msgrequest_sn2(ch);
}
static void
-xpc_received_msg_sn2(struct xpc_channel *ch, struct xpc_msg *msg)
+xpc_received_payload_sn2(struct xpc_channel *ch, void *payload)
{
+ struct xpc_msg_sn2 *msg;
+ s64 msg_number;
s64 get;
- s64 msg_number = msg->number;
+
+ msg = container_of(payload, struct xpc_msg_sn2, payload);
+ msg_number = msg->number;
dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
(void *)msg, msg_number, ch->partid, ch->number);
- DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->msg_size) !=
+ DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->entry_size) !=
msg_number % ch->remote_nentries);
- DBUG_ON(msg->flags & XPC_M_DONE);
+ DBUG_ON(msg->flags & XPC_M_SN2_DONE);
- msg->flags |= XPC_M_DONE;
+ msg->flags |= XPC_M_SN2_DONE;
/*
* The preceding store of msg->flags must occur before the following
- * load of ch->local_GP->get.
+ * load of local_GP->get.
*/
mb();
* See if this message is next in line to be acknowledged as having
* been delivered.
*/
- get = ch->local_GP->get;
+ get = ch->sn.sn2.local_GP->get;
if (get == msg_number)
xpc_acknowledge_msgs_sn2(ch, get, msg->flags);
}
-void
+int
xpc_init_sn2(void)
{
- xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
+ int ret;
+ size_t buf_size;
+
+ xpc_setup_partitions_sn = xpc_setup_partitions_sn_sn2;
+ xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_sn2;
+ xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
xpc_offline_heartbeat = xpc_offline_heartbeat_sn2;
xpc_online_heartbeat = xpc_online_heartbeat_sn2;
xpc_heartbeat_init = xpc_heartbeat_init_sn2;
xpc_heartbeat_exit = xpc_heartbeat_exit_sn2;
- xpc_check_remote_hb = xpc_check_remote_hb_sn2;
-
- xpc_initiate_partition_activation =
- xpc_initiate_partition_activation_sn2;
- xpc_process_act_IRQ_rcvd = xpc_process_act_IRQ_rcvd_sn2;
- xpc_setup_infrastructure = xpc_setup_infrastructure_sn2;
- xpc_teardown_infrastructure = xpc_teardown_infrastructure_sn2;
+ xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_sn2;
+
+ xpc_request_partition_activation = xpc_request_partition_activation_sn2;
+ xpc_request_partition_reactivation =
+ xpc_request_partition_reactivation_sn2;
+ xpc_request_partition_deactivation =
+ xpc_request_partition_deactivation_sn2;
+ xpc_cancel_partition_deactivation_request =
+ xpc_cancel_partition_deactivation_request_sn2;
+
+ xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_sn2;
+ xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_sn2;
+ xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_sn2;
xpc_make_first_contact = xpc_make_first_contact_sn2;
- xpc_get_IPI_flags = xpc_get_IPI_flags_sn2;
- xpc_get_deliverable_msg = xpc_get_deliverable_msg_sn2;
-
- xpc_mark_partition_engaged = xpc_mark_partition_engaged_sn2;
- xpc_mark_partition_disengaged = xpc_mark_partition_disengaged_sn2;
- xpc_request_partition_disengage = xpc_request_partition_disengage_sn2;
- xpc_cancel_partition_disengage_request =
- xpc_cancel_partition_disengage_request_sn2;
+
+ xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2;
+ xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
+ xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
+ xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
+ xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
+
+ xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_sn2;
+
+ xpc_setup_msg_structures = xpc_setup_msg_structures_sn2;
+ xpc_teardown_msg_structures = xpc_teardown_msg_structures_sn2;
+
+ xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2;
+ xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2;
+ xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_sn2;
+ xpc_get_deliverable_payload = xpc_get_deliverable_payload_sn2;
+
+ xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_sn2;
+ xpc_indicate_partition_disengaged =
+ xpc_indicate_partition_disengaged_sn2;
xpc_partition_engaged = xpc_partition_engaged_sn2;
- xpc_partition_disengage_requested =
- xpc_partition_disengage_requested_sn2;
- xpc_clear_partition_engaged = xpc_clear_partition_engaged_sn2;
- xpc_clear_partition_disengage_request =
- xpc_clear_partition_disengage_request_sn2;
+ xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
+ xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2;
- xpc_IPI_send_local_activate = xpc_IPI_send_local_activate_sn2;
- xpc_IPI_send_activated = xpc_IPI_send_activated_sn2;
- xpc_IPI_send_local_reactivate = xpc_IPI_send_local_reactivate_sn2;
- xpc_IPI_send_disengage = xpc_IPI_send_disengage_sn2;
+ xpc_send_payload = xpc_send_payload_sn2;
+ xpc_received_payload = xpc_received_payload_sn2;
- xpc_IPI_send_closerequest = xpc_IPI_send_closerequest_sn2;
- xpc_IPI_send_closereply = xpc_IPI_send_closereply_sn2;
- xpc_IPI_send_openrequest = xpc_IPI_send_openrequest_sn2;
- xpc_IPI_send_openreply = xpc_IPI_send_openreply_sn2;
+ if (offsetof(struct xpc_msg_sn2, payload) > XPC_MSG_HDR_MAX_SIZE) {
+ dev_err(xpc_part, "header portion of struct xpc_msg_sn2 is "
+ "larger than %d\n", XPC_MSG_HDR_MAX_SIZE);
+ return -E2BIG;
+ }
- xpc_allocate_msg = xpc_allocate_msg_sn2;
+ buf_size = max(XPC_RP_VARS_SIZE,
+ XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);
+ xpc_remote_copy_buffer_sn2 = xpc_kmalloc_cacheline_aligned(buf_size,
+ GFP_KERNEL,
+ &xpc_remote_copy_buffer_base_sn2);
+ if (xpc_remote_copy_buffer_sn2 == NULL) {
+ dev_err(xpc_part, "can't get memory for remote copy buffer\n");
+ return -ENOMEM;
+ }
- xpc_send_msg = xpc_send_msg_sn2;
- xpc_received_msg = xpc_received_msg_sn2;
+ /* open up protections for IPI and [potentially] amo operations */
+ xpc_allow_IPI_ops_sn2();
+ xpc_allow_amo_ops_shub_wars_1_1_sn2();
+
+ /*
+ * This is safe to do before the xpc_hb_checker thread has started
+ * because the handler releases a wait queue. If an interrupt is
+ * received before the thread is waiting, it will not go to sleep,
+ * but rather immediately process the interrupt.
+ */
+ ret = request_irq(SGI_XPC_ACTIVATE, xpc_handle_activate_IRQ_sn2, 0,
+ "xpc hb", NULL);
+ if (ret != 0) {
+ dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
+ "errno=%d\n", -ret);
+ xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
+ }
+ return ret;
}
void
xpc_exit_sn2(void)
{
+ free_irq(SGI_XPC_ACTIVATE, NULL);
+ xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
}
projects / linux-2.6-omap-h63xx.git / blobdiff