gpu: host1x: Add channel support

Add support for host1x client modules, and host1x channels to submit
work to the clients.

Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/gpu/host1x/intr.c b/drivers/gpu/host1x/intr.c
index b1b5a80..2491bf8 100644
--- a/drivers/gpu/host1x/intr.c
+++ b/drivers/gpu/host1x/intr.c
@@ -21,6 +21,8 @@
 #include <linux/slab.h>
 #include <linux/irq.h>
 
+#include <trace/events/host1x.h>
+#include "channel.h"
 #include "dev.h"
 #include "intr.h"
 
@@ -66,7 +68,7 @@ static void remove_completed_waiters(struct list_head *head, u32 sync,
 			struct list_head completed[HOST1X_INTR_ACTION_COUNT])
 {
 	struct list_head *dest;
-	struct host1x_waitlist *waiter, *next;
+	struct host1x_waitlist *waiter, *next, *prev;
 
 	list_for_each_entry_safe(waiter, next, head, list) {
 		if ((s32)(waiter->thresh - sync) > 0)
@@ -74,6 +76,17 @@ static void remove_completed_waiters(struct list_head *head, u32 sync,
 
 		dest = completed + waiter->action;
 
+		/* consolidate submit cleanups */
+		if (waiter->action == HOST1X_INTR_ACTION_SUBMIT_COMPLETE &&
+		    !list_empty(dest)) {
+			prev = list_entry(dest->prev,
+					  struct host1x_waitlist, list);
+			if (prev->data == waiter->data) {
+				prev->count++;
+				dest = NULL;
+			}
+		}
+
 		/* PENDING->REMOVED or CANCELLED->HANDLED */
 		if (atomic_inc_return(&waiter->state) == WLS_HANDLED || !dest) {
 			list_del(&waiter->list);
@@ -94,6 +107,18 @@ static void reset_threshold_interrupt(struct host1x *host,
 	host1x_hw_intr_enable_syncpt_intr(host, id);
 }
 
+static void action_submit_complete(struct host1x_waitlist *waiter)
+{
+	struct host1x_channel *channel = waiter->data;
+
+	host1x_cdma_update(&channel->cdma);
+
+	/*  Add nr_completed to trace */
+	trace_host1x_channel_submit_complete(dev_name(channel->dev),
+					     waiter->count, waiter->thresh);
+
+}
+
 static void action_wakeup(struct host1x_waitlist *waiter)
 {
 	wait_queue_head_t *wq = waiter->data;
@@ -109,6 +134,7 @@ static void action_wakeup_interruptible(struct host1x_waitlist *waiter)
 typedef void (*action_handler)(struct host1x_waitlist *waiter);
 
 static action_handler action_handlers[HOST1X_INTR_ACTION_COUNT] = {
+	action_submit_complete,
 	action_wakeup,
 	action_wakeup_interruptible,
 };