Add support to the GRU driver for message queue interrupts.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*/
/* Blade percpu resources PERMANENTLY reserved for kernel use */
-#define GRU_NUM_KERNEL_CBR 1
+#define GRU_NUM_KERNEL_CBR 1
#define GRU_NUM_KERNEL_DSR_BYTES 256
+#define GRU_NUM_KERNEL_DSR_CL (GRU_NUM_KERNEL_DSR_BYTES / \
+ GRU_CACHE_LINE_BYTES)
#define KERNEL_CTXNUM 15
/* GRU instruction attributes for all instructions */
char fill;
};
-#define QLINES(mq) ((mq) + offsetof(struct message_queue, qlines))
#define HSTATUS(mq, h) ((mq) + offsetof(struct message_queue, hstatus[h]))
static int gru_get_cpu_resources(int dsr_bytes, void **cb, void **dsr)
* Create a message queue.
* qlines - message queue size in cache lines. Includes 2-line header.
*/
-int gru_create_message_queue(void *p, unsigned int bytes)
+int gru_create_message_queue(struct gru_message_queue_desc *mqd,
+ void *p, unsigned int bytes, int nasid, int vector, int apicid)
{
struct message_queue *mq = p;
unsigned int qlines;
mq->hstatus[0] = 0;
mq->hstatus[1] = 1;
mq->head = gru_mesq_head(2, qlines / 2 + 1);
+ mqd->mq = mq;
+ mqd->mq_gpa = uv_gpa(mq);
+ mqd->qlines = qlines;
+ mqd->interrupt_pnode = UV_NASID_TO_PNODE(nasid);
+ mqd->interrupt_vector = vector;
+ mqd->interrupt_apicid = apicid;
return 0;
}
EXPORT_SYMBOL_GPL(gru_create_message_queue);
* -1 - if mesq sent successfully but queue not full
* >0 - unexpected error. MQE_xxx returned
*/
-static int send_noop_message(void *cb,
- unsigned long mq, void *mesg)
+static int send_noop_message(void *cb, struct gru_message_queue_desc *mqd,
+ void *mesg)
{
const struct message_header noop_header = {
.present = MQS_NOOP, .lines = 1};
STAT(mesq_noop);
save_mhdr = *mhdr;
*mhdr = noop_header;
- gru_mesq(cb, mq, gru_get_tri(mhdr), 1, IMA);
+ gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), 1, IMA);
ret = gru_wait(cb);
if (ret) {
break;
case CBSS_PUT_NACKED:
STAT(mesq_noop_put_nacked);
- m = mq + (gru_get_amo_value_head(cb) << 6);
+ m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, 1, 1,
IMA);
if (gru_wait(cb) == CBS_IDLE)
/*
* Handle a gru_mesq full.
*/
-static int send_message_queue_full(void *cb,
- unsigned long mq, void *mesg, int lines)
+static int send_message_queue_full(void *cb, struct gru_message_queue_desc *mqd,
+ void *mesg, int lines)
{
union gru_mesqhead mqh;
unsigned int limit, head;
unsigned long avalue;
- int half, qlines, save;
+ int half, qlines;
/* Determine if switching to first/second half of q */
avalue = gru_get_amo_value(cb);
head = gru_get_amo_value_head(cb);
limit = gru_get_amo_value_limit(cb);
- /*
- * Fetch "qlines" from the queue header. Since the queue may be
- * in memory that can't be accessed using socket addresses, use
- * the GRU to access the data. Use DSR space from the message.
- */
- save = *(int *)mesg;
- gru_vload(cb, QLINES(mq), gru_get_tri(mesg), XTYPE_W, 1, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- goto cberr;
- qlines = *(int *)mesg;
- *(int *)mesg = save;
+ qlines = mqd->qlines;
half = (limit != qlines);
if (half)
mqh = gru_mesq_head(2, qlines / 2 + 1);
/* Try to get lock for switching head pointer */
- gru_gamir(cb, EOP_IR_CLR, HSTATUS(mq, half), XTYPE_DW, IMA);
+ gru_gamir(cb, EOP_IR_CLR, HSTATUS(mqd->mq_gpa, half), XTYPE_DW, IMA);
if (gru_wait(cb) != CBS_IDLE)
goto cberr;
if (!gru_get_amo_value(cb)) {
/* Got the lock. Send optional NOP if queue not full, */
if (head != limit) {
- if (send_noop_message(cb, mq, mesg)) {
- gru_gamir(cb, EOP_IR_INC, HSTATUS(mq, half),
+ if (send_noop_message(cb, mqd, mesg)) {
+ gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half),
XTYPE_DW, IMA);
if (gru_wait(cb) != CBS_IDLE)
goto cberr;
}
/* Then flip queuehead to other half of queue. */
- gru_gamer(cb, EOP_ERR_CSWAP, mq, XTYPE_DW, mqh.val, avalue, IMA);
+ gru_gamer(cb, EOP_ERR_CSWAP, mqd->mq_gpa, XTYPE_DW, mqh.val, avalue,
+ IMA);
if (gru_wait(cb) != CBS_IDLE)
goto cberr;
/* If not successfully in swapping queue head, clear the hstatus lock */
if (gru_get_amo_value(cb) != avalue) {
STAT(mesq_qf_switch_head_failed);
- gru_gamir(cb, EOP_IR_INC, HSTATUS(mq, half), XTYPE_DW, IMA);
+ gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half), XTYPE_DW,
+ IMA);
if (gru_wait(cb) != CBS_IDLE)
goto cberr;
}
return MQE_UNEXPECTED_CB_ERR;
}
+/*
+ * Send a cross-partition interrupt to the SSI that contains the target
+ * message queue. Normally, the interrupt is automatically delivered by hardware
+ * but some error conditions require explicit delivery.
+ */
+static void send_message_queue_interrupt(struct gru_message_queue_desc *mqd)
+{
+ if (mqd->interrupt_vector)
+ uv_hub_send_ipi(mqd->interrupt_pnode, mqd->interrupt_apicid,
+ mqd->interrupt_vector);
+}
+
/*
* Handle a gru_mesq failure. Some of these failures are software recoverable
* or retryable.
*/
-static int send_message_failure(void *cb,
- unsigned long mq,
- void *mesg,
- int lines)
+static int send_message_failure(void *cb, struct gru_message_queue_desc *mqd,
+ void *mesg, int lines)
{
int substatus, ret = 0;
unsigned long m;
break;
case CBSS_QLIMIT_REACHED:
STAT(mesq_send_qlimit_reached);
- ret = send_message_queue_full(cb, mq, mesg, lines);
+ ret = send_message_queue_full(cb, mqd, mesg, lines);
break;
case CBSS_AMO_NACKED:
STAT(mesq_send_amo_nacked);
break;
case CBSS_PUT_NACKED:
STAT(mesq_send_put_nacked);
- m = mq + (gru_get_amo_value_head(cb) << 6);
+ m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, lines, 1, IMA);
- if (gru_wait(cb) == CBS_IDLE)
+ if (gru_wait(cb) == CBS_IDLE) {
ret = MQE_OK;
- else
+ send_message_queue_interrupt(mqd);
+ } else {
ret = MQE_UNEXPECTED_CB_ERR;
+ }
break;
default:
BUG();
/*
* Send a message to a message queue
- * cb GRU control block to use to send message
- * mq message queue
+ * mqd message queue descriptor
* mesg message. ust be vaddr within a GSEG
* bytes message size (<= 2 CL)
*/
-int gru_send_message_gpa(unsigned long mq, void *mesg, unsigned int bytes)
+int gru_send_message_gpa(struct gru_message_queue_desc *mqd, void *mesg,
+ unsigned int bytes)
{
struct message_header *mhdr;
void *cb;
do {
ret = MQE_OK;
- gru_mesq(cb, mq, gru_get_tri(mhdr), clines, IMA);
+ gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), clines, IMA);
istatus = gru_wait(cb);
if (istatus != CBS_IDLE)
- ret = send_message_failure(cb, mq, dsr, clines);
+ ret = send_message_failure(cb, mqd, dsr, clines);
} while (ret == MQIE_AGAIN);
gru_free_cpu_resources(cb, dsr);
/*
* Advance the receive pointer for the queue to the next message.
*/
-void gru_free_message(void *rmq, void *mesg)
+void gru_free_message(struct gru_message_queue_desc *mqd, void *mesg)
{
- struct message_queue *mq = rmq;
+ struct message_queue *mq = mqd->mq;
struct message_header *mhdr = mq->next;
void *next, *pnext;
int half = -1;
* present. User must call next_message() to move to next message.
* rmq message queue
*/
-void *gru_get_next_message(void *rmq)
+void *gru_get_next_message(struct gru_message_queue_desc *mqd)
{
- struct message_queue *mq = rmq;
+ struct message_queue *mq = mqd->mq;
struct message_header *mhdr = mq->next;
int present = mhdr->present;
/* skip NOOP messages */
STAT(mesq_receive);
while (present == MQS_NOOP) {
- gru_free_message(rmq, mhdr);
+ gru_free_message(mqd, mhdr);
mhdr = mq->next;
present = mhdr->present;
}
if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr))
return MQE_BUG_NO_RESOURCES;
gru_bcopy(cb, src_gpa, dest_gpa, gru_get_tri(dsr),
- XTYPE_B, bytes, GRU_NUM_KERNEL_DSR_BYTES, IMA);
+ XTYPE_B, bytes, GRU_NUM_KERNEL_DSR_CL, IMA);
ret = gru_wait(cb);
gru_free_cpu_resources(cb, dsr);
return ret;
if (word0 != word1 || word0 != MAGIC) {
printk
- ("GRU quicktest err: gru %d, found 0x%lx, expected 0x%lx\n",
+ ("GRU quicktest err: gid %d, found 0x%lx, expected 0x%lx\n",
gru->gs_gid, word1, MAGIC);
BUG(); /* ZZZ should not be fatal */
}
* - gru_create_message_queue() needs interrupt vector info
*/
+struct gru_message_queue_desc {
+ void *mq; /* message queue vaddress */
+ unsigned long mq_gpa; /* global address of mq */
+ int qlines; /* queue size in CL */
+ int interrupt_vector; /* interrupt vector */
+ int interrupt_pnode; /* pnode for interrupt */
+ int interrupt_apicid; /* lapicid for interrupt */
+};
+
/*
* Initialize a user allocated chunk of memory to be used as
* a message queue. The caller must ensure that the queue is
* to manage the queue.
*
* Input:
- * p pointer to user allocated memory.
+ * mqd pointer to message queue descriptor
+ * p pointer to user allocated mesq memory.
* bytes size of message queue in bytes
+ * vector interrupt vector (zero if no interrupts)
+ * nasid nasid of blade where interrupt is delivered
+ * apicid apicid of cpu for interrupt
*
* Errors:
* 0 OK
* >0 error
*/
-extern int gru_create_message_queue(void *p, unsigned int bytes);
+extern int gru_create_message_queue(struct gru_message_queue_desc *mqd,
+ void *p, unsigned int bytes, int nasid, int vector, int apicid);
/*
* Send a message to a message queue.
*
*
* Input:
- * xmq message queue - must be a UV global physical address
+ * mqd pointer to message queue descriptor
* mesg pointer to message. Must be 64-bit aligned
* bytes size of message in bytes
*
* >0 Send failure - see error codes below
*
*/
-extern int gru_send_message_gpa(unsigned long mq_gpa, void *mesg,
- unsigned int bytes);
+extern int gru_send_message_gpa(struct gru_message_queue_desc *mqd,
+ void *mesg, unsigned int bytes);
/* Status values for gru_send_message() */
#define MQE_OK 0 /* message sent successfully */
* API extensions may allow for out-of-order freeing.
*
* Input
- * mq message queue
+ * mqd pointer to message queue descriptor
* mesq message being freed
*/
-extern void gru_free_message(void *mq, void *mesq);
+extern void gru_free_message(struct gru_message_queue_desc *mqd,
+ void *mesq);
/*
* Get next message from message queue. Returns pointer to
* in order to move the queue pointers to next message.
*
* Input
- * mq message queue
+ * mqd pointer to message queue descriptor
*
* Output:
* p pointer to message
* NULL no message available
*/
-extern void *gru_get_next_message(void *mq);
+extern void *gru_get_next_message(struct gru_message_queue_desc *mqd);
/*
u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */
union {
unsigned long vars_pa; /* phys address of struct xpc_vars */
- unsigned long activate_mq_gpa; /* gru phy addr of activate_mq */
+ unsigned long activate_gru_mq_desc_gpa; /* phys addr of */
+ /* activate mq's */
+ /* gru mq descriptor */
} sn;
unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
u64 pad2[10]; /* align to last u64 in 2nd 64-byte cacheline */
int irq; /* irq raised when message is received in mq */
int mmr_blade; /* blade where watchlist was allocated from */
unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
+ unsigned long mmr_value; /* value of irq mmr located on mmr_blade */
int watchlist_num; /* number of watchlist allocatd by BIOS */
+ void *gru_mq_desc; /* opaque structure used by the GRU driver */
};
/*
* heartbeat, partition active state, and channel state. This is UV only.
*/
struct xpc_activate_mq_msghdr_uv {
+ unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
short partid; /* sender's partid */
u8 act_state; /* sender's act_state at time msg sent */
u8 type; /* message's type */
struct xpc_activate_mq_msg_activate_req_uv {
struct xpc_activate_mq_msghdr_uv hdr;
unsigned long rp_gpa;
- unsigned long activate_mq_gpa;
+ unsigned long activate_gru_mq_desc_gpa;
};
struct xpc_activate_mq_msg_deactivate_req_uv {
short ch_number;
short remote_nentries; /* ??? Is this needed? What is? */
short local_nentries; /* ??? Is this needed? What is? */
- unsigned long local_notify_mq_gpa;
+ unsigned long notify_gru_mq_desc_gpa;
};
/*
};
struct xpc_channel_uv {
- unsigned long remote_notify_mq_gpa; /* gru phys address of remote */
- /* partition's notify mq */
+ void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
+ /* gru mq descriptor */
struct xpc_send_msg_slot_uv *send_msg_slots;
void *recv_msg_slots; /* each slot will hold a xpc_notify_mq_msg_uv */
};
struct xpc_partition_uv {
- unsigned long remote_activate_mq_gpa; /* gru phys address of remote */
- /* partition's activate mq */
+ unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */
+ /* activate mq's gru mq */
+ /* descriptor */
+ void *cached_activate_gru_mq_desc; /* cached copy of partition's */
+ /* activate mq's gru mq descriptor */
+ struct mutex cached_activate_gru_mq_desc_mutex;
spinlock_t flags_lock; /* protect updating of flags */
unsigned int flags; /* general flags */
u8 remote_act_state; /* remote partition's act_state */
/* struct xpc_partition_uv flags */
-#define XPC_P_HEARTBEAT_OFFLINE_UV 0x00000001
-#define XPC_P_ENGAGED_UV 0x00000002
+#define XPC_P_HEARTBEAT_OFFLINE_UV 0x00000001
+#define XPC_P_ENGAGED_UV 0x00000002
+#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV 0x00000004
/* struct xpc_partition_uv act_state change requests */
extern void xpc_create_kthreads(struct xpc_channel *, int, int);
extern void xpc_disconnect_wait(int);
extern int (*xpc_setup_partitions_sn) (void);
+extern void (*xpc_teardown_partitions_sn) (void);
extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *,
unsigned long *,
size_t *);
unsigned long *);
extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *);
-extern void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
- unsigned long);
+extern enum xp_retval (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
+ unsigned long);
extern enum xp_retval (*xpc_send_payload) (struct xpc_channel *, u32, void *,
u16, u8, xpc_notify_func, void *);
&part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
enum xp_retval reason;
+ enum xp_retval ret;
spin_lock_irqsave(&ch->lock, irq_flags);
DBUG_ON(args->local_nentries == 0);
DBUG_ON(args->remote_nentries == 0);
+ ret = xpc_save_remote_msgqueue_pa(ch, args->local_msgqueue_pa);
+ if (ret != xpSuccess) {
+ XPC_DISCONNECT_CHANNEL(ch, ret, &irq_flags);
+ spin_unlock_irqrestore(&ch->lock, irq_flags);
+ return;
+ }
ch->flags |= XPC_C_ROPENREPLY;
- xpc_save_remote_msgqueue_pa(ch, args->local_msgqueue_pa);
if (args->local_nentries < ch->remote_nentries) {
dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "
};
int (*xpc_setup_partitions_sn) (void);
+void (*xpc_teardown_partitions_sn) (void);
enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *buf, u64 *cookie,
unsigned long *rp_pa,
size_t *len);
void (*xpc_send_chctl_openreply) (struct xpc_channel *ch,
unsigned long *irq_flags);
-void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *ch,
- unsigned long msgqueue_pa);
+enum xp_retval (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *ch,
+ unsigned long msgqueue_pa);
enum xp_retval (*xpc_send_payload) (struct xpc_channel *ch, u32 flags,
void *payload, u16 payload_size,
static void
xpc_teardown_partitions(void)
{
+ xpc_teardown_partitions_sn();
kfree(xpc_partitions);
}
return 0;
}
+static void
+xpc_teardown_partitions_sn_sn2(void)
+{
+ /* nothing needs to be done */
+}
+
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access_sn2;
static u64 xpc_sh2_IPI_access0_sn2;
XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
}
-static void
+static enum xp_retval
xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
unsigned long msgqueue_pa)
{
ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
+ return xpSuccess;
}
/*
size_t buf_size;
xpc_setup_partitions_sn = xpc_setup_partitions_sn_sn2;
+ xpc_teardown_partitions_sn = xpc_teardown_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;
#include "../sgi-gru/grukservices.h"
#include "xpc.h"
+#if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+struct uv_IO_APIC_route_entry {
+ __u64 vector : 8,
+ delivery_mode : 3,
+ dest_mode : 1,
+ delivery_status : 1,
+ polarity : 1,
+ __reserved_1 : 1,
+ trigger : 1,
+ mask : 1,
+ __reserved_2 : 15,
+ dest : 32;
+};
+#endif
+
static atomic64_t xpc_heartbeat_uv;
static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
part_uv = &xpc_partitions[partid].sn.uv;
+ mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex);
spin_lock_init(&part_uv->flags_lock);
part_uv->remote_act_state = XPC_P_AS_INACTIVE;
}
return 0;
}
+static void
+xpc_teardown_partitions_sn_uv(void)
+{
+ short partid;
+ struct xpc_partition_uv *part_uv;
+ unsigned long irq_flags;
+
+ for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
+ part_uv = &xpc_partitions[partid].sn.uv;
+
+ if (part_uv->cached_activate_gru_mq_desc != NULL) {
+ mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
+ spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
+ part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
+ spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
+ kfree(part_uv->cached_activate_gru_mq_desc);
+ part_uv->cached_activate_gru_mq_desc = NULL;
+ mutex_unlock(&part_uv->
+ cached_activate_gru_mq_desc_mutex);
+ }
+ }
+}
+
static int
xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
{
+ int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
+
#if defined CONFIG_X86_64
mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset);
if (mq->irq < 0) {
dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
- mq->irq);
+ -mq->irq);
+ return mq->irq;
}
-#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
- int mmr_pnode;
- unsigned long mmr_value;
+ mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
mq->irq = SGI_XPC_ACTIVATE;
else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
else
return -EINVAL;
- mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
- mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
-
- uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
+ mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
+ uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value);
#else
#error not a supported configuration
#endif
return ret;
}
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
- ret = sn_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address),
+ ret = sn_mq_watchlist_alloc(mq->mmr_blade, (void *)uv_gpa(mq->address),
mq->order, &mq->mmr_offset);
if (ret < 0) {
dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
int pg_order;
struct page *page;
struct xpc_gru_mq_uv *mq;
+ struct uv_IO_APIC_route_entry *mmr_value;
mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
if (mq == NULL) {
dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
"a xpc_gru_mq_uv structure\n");
ret = -ENOMEM;
+ goto out_0;
+ }
+
+ mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc),
+ GFP_KERNEL);
+ if (mq->gru_mq_desc == NULL) {
+ dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
+ "a gru_message_queue_desc structure\n");
+ ret = -ENOMEM;
goto out_1;
}
}
mq->address = page_address(page);
- ret = gru_create_message_queue(mq->address, mq_size);
- if (ret != 0) {
- dev_err(xpc_part, "gru_create_message_queue() returned "
- "error=%d\n", ret);
- ret = -EINVAL;
- goto out_3;
- }
-
/* enable generation of irq when GRU mq operation occurs to this mq */
ret = xpc_gru_mq_watchlist_alloc_uv(mq);
if (ret != 0)
ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
if (ret != 0) {
dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
- mq->irq, ret);
+ mq->irq, -ret);
goto out_5;
}
+ mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value;
+ ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size,
+ nid, mmr_value->vector, mmr_value->dest);
+ if (ret != 0) {
+ dev_err(xpc_part, "gru_create_message_queue() returned "
+ "error=%d\n", ret);
+ ret = -EINVAL;
+ goto out_6;
+ }
+
/* allow other partitions to access this GRU mq */
xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
if (xp_ret != xpSuccess) {
out_3:
free_pages((unsigned long)mq->address, pg_order);
out_2:
- kfree(mq);
+ kfree(mq->gru_mq_desc);
out_1:
+ kfree(mq);
+out_0:
return ERR_PTR(ret);
}
}
static enum xp_retval
-xpc_send_gru_msg(unsigned long mq_gpa, void *msg, size_t msg_size)
+xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg,
+ size_t msg_size)
{
enum xp_retval xp_ret;
int ret;
while (1) {
- ret = gru_send_message_gpa(mq_gpa, msg, msg_size);
+ ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size);
if (ret == MQE_OK) {
xp_ret = xpSuccess;
break;
part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
- part_uv->remote_activate_mq_gpa = msg->activate_mq_gpa;
+
+ if (msg->activate_gru_mq_desc_gpa !=
+ part_uv->activate_gru_mq_desc_gpa) {
+ spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
+ part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
+ spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
+ part_uv->activate_gru_mq_desc_gpa =
+ msg->activate_gru_mq_desc_gpa;
+ }
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
args = &part->remote_openclose_args[msg->ch_number];
args->remote_nentries = msg->remote_nentries;
args->local_nentries = msg->local_nentries;
- args->local_msgqueue_pa = msg->local_notify_mq_gpa;
+ args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
short partid;
struct xpc_partition *part;
int wakeup_hb_checker = 0;
+ int part_referenced;
while (1) {
- msg_hdr = gru_get_next_message(xpc_activate_mq_uv->address);
+ msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc);
if (msg_hdr == NULL)
break;
partid);
} else {
part = &xpc_partitions[partid];
- if (xpc_part_ref(part)) {
- xpc_handle_activate_mq_msg_uv(part, msg_hdr,
- &wakeup_hb_checker);
+
+ part_referenced = xpc_part_ref(part);
+ xpc_handle_activate_mq_msg_uv(part, msg_hdr,
+ &wakeup_hb_checker);
+ if (part_referenced)
xpc_part_deref(part);
- }
}
- gru_free_message(xpc_activate_mq_uv->address, msg_hdr);
+ gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr);
}
if (wakeup_hb_checker)
}
static enum xp_retval
+xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc,
+ unsigned long gru_mq_desc_gpa)
+{
+ enum xp_retval ret;
+
+ ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa,
+ sizeof(struct gru_message_queue_desc));
+ if (ret == xpSuccess)
+ gru_mq_desc->mq = NULL;
+
+ return ret;
+}
+
+static enum xp_retval
xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
int msg_type)
{
struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
+ struct xpc_partition_uv *part_uv = &part->sn.uv;
+ struct gru_message_queue_desc *gru_mq_desc;
+ unsigned long irq_flags;
+ enum xp_retval ret;
DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
msg_hdr->type = msg_type;
- msg_hdr->partid = XPC_PARTID(part);
+ msg_hdr->partid = xp_partition_id;
msg_hdr->act_state = part->act_state;
msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
+ mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
+again:
+ if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) {
+ gru_mq_desc = part_uv->cached_activate_gru_mq_desc;
+ if (gru_mq_desc == NULL) {
+ gru_mq_desc = kmalloc(sizeof(struct
+ gru_message_queue_desc),
+ GFP_KERNEL);
+ if (gru_mq_desc == NULL) {
+ ret = xpNoMemory;
+ goto done;
+ }
+ part_uv->cached_activate_gru_mq_desc = gru_mq_desc;
+ }
+
+ ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc,
+ part_uv->
+ activate_gru_mq_desc_gpa);
+ if (ret != xpSuccess)
+ goto done;
+
+ spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
+ part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
+ spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
+ }
+
/* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
- return xpc_send_gru_msg(part->sn.uv.remote_activate_mq_gpa, msg,
- msg_size);
+ ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg,
+ msg_size);
+ if (ret != xpSuccess) {
+ smp_rmb(); /* ensure a fresh copy of part_uv->flags */
+ if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV))
+ goto again;
+ }
+done:
+ mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex);
+ return ret;
}
static void
xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
void *msg, size_t msg_size, int msg_type)
{
- struct xpc_partition *part = &xpc_partitions[ch->number];
+ struct xpc_partition *part = &xpc_partitions[ch->partid];
enum xp_retval ret;
ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
static int
xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
{
- rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv->address);
+ rp->sn.activate_gru_mq_desc_gpa =
+ uv_gpa(xpc_activate_mq_uv->gru_mq_desc);
return 0;
}
part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
- part->sn.uv.remote_activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
+ part->sn.uv.activate_gru_mq_desc_gpa =
+ remote_rp->sn.activate_gru_mq_desc_gpa;
/*
* ??? Is it a good idea to make this conditional on what is
*/
if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
msg.rp_gpa = uv_gpa(xpc_rsvd_page);
- msg.activate_mq_gpa = xpc_rsvd_page->sn.activate_mq_gpa;
+ msg.activate_gru_mq_desc_gpa =
+ xpc_rsvd_page->sn.activate_gru_mq_desc_gpa;
xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
}
if (head->first == NULL)
head->last = NULL;
}
- head->n_entries++;
+ head->n_entries--;
+ BUG_ON(head->n_entries < 0);
spin_unlock_irqrestore(&head->lock, irq_flags);
first->next = NULL;
return first;
else
head->first = last;
head->last = last;
- head->n_entries--;
- BUG_ON(head->n_entries < 0);
+ head->n_entries++;
spin_unlock_irqrestore(&head->lock, irq_flags);
}
DBUG_ON(ch->flags & XPC_C_SETUP);
+ ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct
+ gru_message_queue_desc),
+ GFP_KERNEL);
+ if (ch_uv->cached_notify_gru_mq_desc == NULL)
+ return xpNoMemory;
+
ret = xpc_allocate_send_msg_slot_uv(ch);
if (ret == xpSuccess) {
DBUG_ON(!spin_is_locked(&ch->lock));
- ch_uv->remote_notify_mq_gpa = 0;
+ kfree(ch_uv->cached_notify_gru_mq_desc);
+ ch_uv->cached_notify_gru_mq_desc = NULL;
if (ch->flags & XPC_C_SETUP) {
xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
msg.ch_number = ch->number;
msg.local_nentries = ch->local_nentries;
msg.remote_nentries = ch->remote_nentries;
- msg.local_notify_mq_gpa = uv_gpa(xpc_notify_mq_uv);
+ msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc);
xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
}
xpc_wakeup_channel_mgr(part);
}
-static void
+static enum xp_retval
xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
- unsigned long msgqueue_pa)
+ unsigned long gru_mq_desc_gpa)
{
- ch->sn.uv.remote_notify_mq_gpa = msgqueue_pa;
+ struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+
+ DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL);
+ return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc,
+ gru_mq_desc_gpa);
}
static void
short partid;
struct xpc_partition *part;
- while ((msg = gru_get_next_message(xpc_notify_mq_uv)) != NULL) {
+ while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) !=
+ NULL) {
partid = msg->hdr.partid;
if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
}
}
- gru_free_message(xpc_notify_mq_uv, msg);
+ gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg);
}
return IRQ_HANDLED;
msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
memcpy(&msg->payload, payload, payload_size);
- ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg, msg_size);
+ ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
+ msg_size);
if (ret == xpSuccess)
goto out_1;
msg->hdr.partid = xp_partition_id;
msg->hdr.size = 0; /* size of zero indicates this is an ACK */
- ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg,
+ ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
sizeof(struct xpc_notify_mq_msghdr_uv));
if (ret != xpSuccess)
XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
xpc_init_uv(void)
{
xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv;
+ xpc_teardown_partitions_sn = xpc_teardown_partitions_sn_uv;
xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv;
xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv;
xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv;
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff