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path: root/drivers/misc/sgi-gru/grukservices.c
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Diffstat (limited to 'drivers/misc/sgi-gru/grukservices.c')
-rw-r--r--drivers/misc/sgi-gru/grukservices.c104
1 files changed, 58 insertions, 46 deletions
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index 247635d6d6e..a3712843115 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -52,8 +52,10 @@
*/
/* 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 */
@@ -94,7 +96,6 @@ struct message_header {
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)
@@ -250,7 +251,8 @@ static inline void restore_present2(void *p, int val)
* 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;
@@ -265,6 +267,12 @@ int gru_create_message_queue(void *p, unsigned int bytes)
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);
@@ -277,8 +285,8 @@ 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};
@@ -289,7 +297,7 @@ static int send_noop_message(void *cb,
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) {
@@ -313,7 +321,7 @@ static int send_noop_message(void *cb,
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)
@@ -333,30 +341,20 @@ static int send_noop_message(void *cb,
/*
* 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)
@@ -365,7 +363,7 @@ static int send_message_queue_full(void *cb,
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)) {
@@ -375,8 +373,8 @@ static int send_message_queue_full(void *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;
@@ -387,14 +385,16 @@ static int send_message_queue_full(void *cb,
}
/* 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;
}
@@ -404,15 +404,25 @@ 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;
@@ -429,7 +439,7 @@ static int send_message_failure(void *cb,
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);
@@ -437,12 +447,14 @@ static int send_message_failure(void *cb,
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();
@@ -452,12 +464,12 @@ static int send_message_failure(void *cb,
/*
* 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;
@@ -481,10 +493,10 @@ int gru_send_message_gpa(unsigned long mq, void *mesg, unsigned int bytes)
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);
@@ -497,9 +509,9 @@ EXPORT_SYMBOL_GPL(gru_send_message_gpa);
/*
* 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;
@@ -529,16 +541,16 @@ EXPORT_SYMBOL_GPL(gru_free_message);
* 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;
}
@@ -576,7 +588,7 @@ int gru_copy_gpa(unsigned long dest_gpa, unsigned long src_gpa,
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;
@@ -611,7 +623,7 @@ static int quicktest(struct gru_state *gru)
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 */
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 14:49:11 +0000