Add a function to control wake-up on new requests. This will enable
Software Command Queuing to choose whether or not to queue new
requests immediately or wait for the current task to complete.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/mmc/card/queue.c | 16 ++++++++++++++++
drivers/mmc/card/queue.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 4e134884a183..0781578fc8b6 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -94,6 +94,7 @@ static int mmc_queue_thread(void *d)
cntx->is_waiting_last_req = false;
cntx->is_new_req = false;
if (!req) {
+ mq->is_new_req = false;
/*
* Dispatch queue is empty so set flags for
* mmc_request_fn() to wake us up.
@@ -144,6 +145,8 @@ static void mmc_request_fn(struct request_queue *q)
return;
}
+ mq->is_new_req = true;
+
cntx = &mq->card->host->context_info;
if (cntx->is_waiting_last_req) {
@@ -155,6 +158,19 @@ static void mmc_request_fn(struct request_queue *q)
wake_up_process(mq->thread);
}
+void mmc_queue_set_wake(struct mmc_queue *mq, bool wake_me)
+{
+ struct mmc_context_info *cntx = &mq->card->host->context_info;
+ struct request_queue *q = mq->queue;
+
+ if (cntx->is_waiting_last_req != wake_me) {
+ spin_lock_irq(q->queue_lock);
+ cntx->is_waiting_last_req = wake_me;
+ cntx->is_new_req = wake_me && mq->is_new_req;
+ spin_unlock_irq(q->queue_lock);
+ }
+}
+
static struct scatterlist *mmc_alloc_sg(int sg_len, int *err)
{
struct scatterlist *sg;
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 1afd5dafd46d..a6d5b0f94662 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -52,6 +52,7 @@ struct mmc_queue {
unsigned int flags;
#define MMC_QUEUE_SUSPENDED (1 << 0)
bool asleep;
+ bool is_new_req;
int (*issue_fn)(struct mmc_queue *, struct request *);
void *data;
@@ -81,5 +82,6 @@ extern int mmc_access_rpmb(struct mmc_queue *);
extern struct mmc_queue_req *mmc_queue_req_find(struct mmc_queue *,
struct request *);
extern void mmc_queue_req_free(struct mmc_queue *, struct mmc_queue_req *);
+extern void mmc_queue_set_wake(struct mmc_queue *, bool);
#endif
--
1.9.1
--
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