misc: artiktee: handle tz command request time.

If tzdev occurs timeout, all requests will be closed
and handle other TA's requests sequentially.

Change-Id: Ib08a3a937681aa2ca2cc93c151be2c45879a8c04
Signed-off-by: Seungho Lee <sh1006.lee@samsung.com>

3 files changed, 22 insertions, 7 deletions

diff --git a/drivers/misc/artiktee/smc_interface.h b/drivers/misc/artiktee/smc_interface.h
index dcf63f3a565..f63bbbc6465 100644..100755
--- a/drivers/misc/artiktee/smc_interface.h
+++ b/drivers/misc/artiktee/smc_interface.h
@@ -1,5 +1,6 @@
 /*********************************************************
  * Copyright (C) 2011 - 2015 Samsung Electronics Co., Ltd All Rights Reserved
+ * Author: Jaroslaw Pelczar <j.pelczar@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -26,8 +27,6 @@
 #define SMC_STD_REGISTER_SYSPAGE		1
 /* R1 - wsm id page */
 #define SMC_STD_REGISTER_MINIDUMP		2
-/* R1 - address, R2 - size, R3 - flags, R4 - tee context ID */
-#define SMC_STD_REGISTER_WSM			3
 /* R1 - wsm ID */
 #define SMC_STD_UNREGISTER_WSM			4
 /* R1 - wsm ID */
diff --git a/drivers/misc/artiktee/tzdev.h b/drivers/misc/artiktee/tzdev.h
index 739190bd4a8..730513fa790 100644..100755
--- a/drivers/misc/artiktee/tzdev.h
+++ b/drivers/misc/artiktee/tzdev.h
@@ -44,6 +44,7 @@ struct tzio_message {
 	__u32		endpoint;
 	__u32		length;
 	int32_t	context_id;
+	uint32_t timeout_seconds;
 	char		payload[];
 };
 
diff --git a/drivers/misc/artiktee/tzdev_main.c b/drivers/misc/artiktee/tzdev_main.c
index 1fc6d262e75..ceddf2d6e83 100644..100755
--- a/drivers/misc/artiktee/tzdev_main.c
+++ b/drivers/misc/artiktee/tzdev_main.c
@@ -69,6 +69,7 @@ struct tzio_context {
 	void *payload;
 	size_t payload_size;
 	int softlock_timer;
+	unsigned int timeout_seconds;
 	struct completion comp;
 	struct file *owner;
 	int state;
@@ -306,7 +307,7 @@ static void tzio_reset_softlock_timer(int cpu)
 #endif /* !CONFIG_PSCI */
 
 void tzio_init_context(struct tzio_context *ctx, struct file *filp,
-		       void *payload)
+		       void *payload, uint32_t seconds)
 {
 	init_completion(&ctx->comp);
 
@@ -315,6 +316,7 @@ void tzio_init_context(struct tzio_context *ctx, struct file *filp,
 	ctx->payload_size = 0;
 	ctx->softlock_timer = 0;
 	ctx->owner = filp;
+	ctx->timeout_seconds = seconds;
 }
 
 void tzio_rbtree_list_context_node(void)
@@ -333,11 +335,10 @@ void tzio_rbtree_list_context_node(void)
 	tzlog_print(TZLOG_DEBUG, "End list all context node in rbtree\n");
 }
 
-void tzio_connection_closed(struct scm_msg_link *msg)
+void tzio_connection_closed(int epid)
 {
 	struct tzio_context *tmp_node;
 	int id;
-	int epid = msg->channel & ~PAGE_MASK;
 	unsigned long flags;
 
 	tzlog_print(TZLOG_DEBUG, "TA of channel ID %d died\n", epid);
@@ -516,7 +517,7 @@ static int tzio_pop_message(struct scm_buffer *ring)
 			rx_taken += sizeof(struct scm_msg_link) + mtcp.length;
 			rx_avail -= sizeof(struct scm_msg_link) + mtcp.length;
 
-			tzio_connection_closed(&mtcp);
+			tzio_connection_closed(mtcp.channel & ~PAGE_MASK);
 			break;
 		case SCM_LLC_DATA:
 			spin_lock_irqsave(&tzio_context_slock, flags);
@@ -796,6 +797,12 @@ int tzio_message_wait(struct tzio_message *__user msg,
 						scm_softlockup();
 					}
 				}
+
+				if(context->timeout_seconds > 0 && context->softlock_timer > context->timeout_seconds) {
+					tzlog_print(TZLOG_ERROR, "TA %u timed out. Killing all requests\n", context->remote_id);
+					tzio_connection_closed(context->remote_id);
+					break;
+				}
 			}
 			/* soft lockup checking end */
 		}
@@ -872,6 +879,7 @@ int tzio_exchange_message(struct file *filp, struct tzio_message *__user msg)
 	unsigned int svc_flags;
 	char __payload[TZIO_PAYLOAD_MAX];
 	int32_t restart_context_id;
+	uint32_t timeout_seconds;
 
 	ret = get_user(restart_context_id, &msg->context_id);
 
@@ -880,6 +888,13 @@ int tzio_exchange_message(struct file *filp, struct tzio_message *__user msg)
 		return ret;
 	}
 
+	ret = get_user(timeout_seconds, &msg->timeout_seconds);
+
+	if (ret < 0) {
+		tzlog_print(TZLOG_ERROR, "get_user error\n");
+		return ret;
+	}
+
 	if (restart_context_id) {
 		return tzio_message_restart(msg, filp, restart_context_id);
 	}
@@ -913,7 +928,7 @@ int tzio_exchange_message(struct file *filp, struct tzio_message *__user msg)
 		return -ENOMEM;
 	}
 
-	tzio_init_context(context, filp, __payload);
+	tzio_init_context(context, filp, __payload, timeout_seconds);
 
 	link = tzio_acquire_link(GFP_KERNEL);