ch_ktls: Issue if connection offload fails

Since driver first return success to tls_dev_add, if req to HW is
successful, but later if HW returns failure, that connection traffic
fails permanently and connection status remains unknown to stack.

v1->v2:
- removed conn_up from all places.

v2->v3:
- Corrected timeout handling.

Fixes: 34aba2c4 ("cxgb4/chcr : Register to tls add and del callback")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.h

@@ -27,22 +27,20 @@
 #define CHCR_KTLS_WR_SIZE	(CHCR_PLAIN_TX_DATA_LEN +\
 				 sizeof(struct cpl_tx_sec_pdu))
 
-enum chcr_ktls_conn_state {
-	KTLS_CONN_CLOSED,
-	KTLS_CONN_ACT_OPEN_REQ,
-	KTLS_CONN_ACT_OPEN_RPL,
-	KTLS_CONN_SET_TCB_REQ,
-	KTLS_CONN_SET_TCB_RPL,
-	KTLS_CONN_TX_READY,
+enum ch_ktls_open_state {
+	CH_KTLS_OPEN_SUCCESS = 0,
+	CH_KTLS_OPEN_PENDING = 1,
+	CH_KTLS_OPEN_FAILURE = 2,
 };
 
 struct chcr_ktls_info {
 	struct sock *sk;
-	spinlock_t lock; /* state machine lock */
+	spinlock_t lock; /* lock for pending_close */
 	struct ktls_key_ctx key_ctx;
 	struct adapter *adap;
 	struct l2t_entry *l2te;
 	struct net_device *netdev;
+	struct completion completion;
 	u64 iv;
 	u64 record_no;
 	int tid;
@@ -58,13 +56,14 @@ struct chcr_ktls_info {
 	u32 tcp_start_seq_number;
 	u32 scmd0_short_seqno_numivs;
 	u32 scmd0_short_ivgen_hdrlen;
-	enum chcr_ktls_conn_state connection_state;
 	u16 prev_win;
 	u8 tx_chan;
 	u8 smt_idx;
 	u8 port_id;
 	u8 ip_family;
 	u8 first_qset;
+	enum ch_ktls_open_state open_state;
+	bool pending_close;
 };
 
 struct chcr_ktls_ofld_ctx_tx {