qed: Add iWARP out of order support

iWARP requires OOO support which is already provided by the ll2
interface (until now was used only for iSCSI offload).
The changes mostly include opening a ll2 dedicated connection for
OOO and notifiying the FW about the handle id.
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_iwarp.c

@@ -41,6 +41,7 @@
 #include "qed_rdma.h"
 #include "qed_reg_addr.h"
 #include "qed_sp.h"
+#include "qed_ooo.h"
 
 #define QED_IWARP_ORD_DEFAULT		32
 #define QED_IWARP_IRD_DEFAULT		32
@@ -119,6 +120,13 @@ static void qed_iwarp_cid_cleaned(struct qed_hwfn *p_hwfn, u32 cid)
 	spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
 }
 
+void qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
+			      struct iwarp_init_func_params *p_ramrod)
+{
+	p_ramrod->ll2_ooo_q_index = RESC_START(p_hwfn, QED_LL2_QUEUE) +
+				    p_hwfn->p_rdma_info->iwarp.ll2_ooo_handle;
+}
+
 static int qed_iwarp_alloc_cid(struct qed_hwfn *p_hwfn, u32 *cid)
 {
 	int rc;
@@ -1876,6 +1884,16 @@ static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 		iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
 	}
 
+	if (iwarp_info->ll2_ooo_handle != QED_IWARP_HANDLE_INVAL) {
+		rc = qed_ll2_terminate_connection(p_hwfn,
+						  iwarp_info->ll2_ooo_handle);
+		if (rc)
+			DP_INFO(p_hwfn, "Failed to terminate ooo connection\n");
+
+		qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
+		iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
+	}
+
 	qed_llh_remove_mac_filter(p_hwfn,
 				  p_ptt, p_hwfn->p_rdma_info->iwarp.mac_addr);
 	return rc;
@@ -1927,10 +1945,12 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
 	struct qed_iwarp_info *iwarp_info;
 	struct qed_ll2_acquire_data data;
 	struct qed_ll2_cbs cbs;
+	u16 n_ooo_bufs;
 	int rc = 0;
 
 	iwarp_info = &p_hwfn->p_rdma_info->iwarp;
 	iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
+	iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
 
 	iwarp_info->max_mtu = params->max_mtu;
 
@@ -1978,6 +1998,29 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
 	if (rc)
 		goto err;
 
+	/* Start OOO connection */
+	data.input.conn_type = QED_LL2_TYPE_OOO;
+	data.input.mtu = params->max_mtu;
+
+	n_ooo_bufs = (QED_IWARP_MAX_OOO * QED_IWARP_RCV_WND_SIZE_DEF) /
+		     iwarp_info->max_mtu;
+	n_ooo_bufs = min_t(u32, n_ooo_bufs, QED_IWARP_LL2_OOO_MAX_RX_SIZE);
+
+	data.input.rx_num_desc = n_ooo_bufs;
+	data.input.rx_num_ooo_buffers = n_ooo_bufs;
+
+	data.input.tx_max_bds_per_packet = 1;	/* will never be fragmented */
+	data.input.tx_num_desc = QED_IWARP_LL2_OOO_DEF_TX_SIZE;
+	data.p_connection_handle = &iwarp_info->ll2_ooo_handle;
+
+	rc = qed_ll2_acquire_connection(p_hwfn, &data);
+	if (rc)
+		goto err;
+
+	rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_ooo_handle);
+	if (rc)
+		goto err;
+
 	return rc;
 err:
 	qed_iwarp_ll2_stop(p_hwfn, p_ptt);
@@ -2014,6 +2057,7 @@ int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
 
 	qed_spq_register_async_cb(p_hwfn, PROTOCOLID_IWARP,
 				  qed_iwarp_async_event);
+	qed_ooo_setup(p_hwfn);
 
 	return qed_iwarp_ll2_start(p_hwfn, params, p_ptt);
 }

drivers/net/ethernet/qlogic/qed/qed_iwarp.h

@@ -47,7 +47,12 @@ enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state);
 #define QED_IWARP_LL2_SYN_TX_SIZE       (128)
 #define QED_IWARP_LL2_SYN_RX_SIZE       (256)
 #define QED_IWARP_MAX_SYN_PKT_SIZE      (128)
-#define QED_IWARP_HANDLE_INVAL			(0xff)
+
+#define QED_IWARP_LL2_OOO_DEF_TX_SIZE   (256)
+#define QED_IWARP_MAX_OOO		(16)
+#define QED_IWARP_LL2_OOO_MAX_RX_SIZE   (16384)
+
+#define QED_IWARP_HANDLE_INVAL		(0xff)
 
 struct qed_iwarp_ll2_buff {
 	void *data;
@@ -67,6 +72,7 @@ struct qed_iwarp_info {
 	u8 crc_needed;
 	u8 tcp_flags;
 	u8 ll2_syn_handle;
+	u8 ll2_ooo_handle;
 	u8 peer2peer;
 	enum mpa_negotiation_mode mpa_rev;
 	enum mpa_rtr_type rtr_type;
@@ -147,6 +153,9 @@ int qed_iwarp_alloc(struct qed_hwfn *p_hwfn);
 int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
 		    struct qed_rdma_start_in_params *params);
 
+void qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
+			      struct iwarp_init_func_params *p_ramrod);
+
 int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 
 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn);

drivers/net/ethernet/qlogic/qed/qed_rdma.c

@@ -551,10 +551,13 @@ static int qed_rdma_start_fw(struct qed_hwfn *p_hwfn,
 	if (rc)
 		return rc;
 
-	if (QED_IS_IWARP_PERSONALITY(p_hwfn))
+	if (QED_IS_IWARP_PERSONALITY(p_hwfn)) {
+		qed_iwarp_init_fw_ramrod(p_hwfn,
+					 &p_ent->ramrod.iwarp_init_func.iwarp);
 		p_ramrod = &p_ent->ramrod.iwarp_init_func.rdma;
-	else
+	} else {
 		p_ramrod = &p_ent->ramrod.roce_init_func.rdma;
+	}
 
 	p_params_header = &p_ramrod->params_header;
 	p_params_header->cnq_start_offset = (u8)RESC_START(p_hwfn,