[PATCH 7/7] qlcnic: multi protocol internal loopback support added.

[Anirban Chakraborty <anirban.chakraborty@qlogic.com>]

From: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>

Driver will generate loopback traffic pattern and do the test. And
returns result of the test to application.

Updated driver version to 5.0.19.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
---
 drivers/net/qlcnic/qlcnic.h         |   22 ++++++-
 drivers/net/qlcnic/qlcnic_ethtool.c |  123 +++++++++++++++++++++++++++++++++-
 drivers/net/qlcnic/qlcnic_hw.c      |   50 ++++++++++++++
 drivers/net/qlcnic/qlcnic_init.c    |  126 ++++++++++++++++++++++++++++++++++-
 drivers/net/qlcnic/qlcnic_main.c    |    6 ++
 5 files changed, 322 insertions(+), 5 deletions(-)

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 0be84bd..e545450 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -36,8 +36,8 @@
 
 #define _QLCNIC_LINUX_MAJOR 5
 #define _QLCNIC_LINUX_MINOR 0
-#define _QLCNIC_LINUX_SUBVERSION 18
-#define QLCNIC_LINUX_VERSIONID  "5.0.18"
+#define _QLCNIC_LINUX_SUBVERSION 19
+#define QLCNIC_LINUX_VERSIONID  "5.0.19"
 #define QLCNIC_DRV_IDC_VER  0x01
 #define QLCNIC_DRIVER_VERSION  ((_QLCNIC_LINUX_MAJOR << 16) |\
 		 (_QLCNIC_LINUX_MINOR << 8) | (_QLCNIC_LINUX_SUBVERSION))
@@ -451,6 +451,7 @@ struct qlcnic_hardware_context {
 	u8 revision_id;
 	u8 pci_func;
 	u8 linkup;
+	u8 loopback_state;
 	u16 port_type;
 	u16 board_type;
 
@@ -780,6 +781,13 @@ struct qlcnic_mac_list_s {
 #define QLCNIC_IP_UP		2
 #define QLCNIC_IP_DOWN		3
 
+#define QLCNIC_ILB_MODE		0x1
+
+#define QLCNIC_LINKEVENT	0x1
+#define QLCNIC_LB_RESPONSE	0x2
+#define QLCNIC_IS_LB_CONFIGURED(VAL)	\
+		(VAL == (QLCNIC_LINKEVENT | QLCNIC_LB_RESPONSE))
+
 /*
  * Driver --> Firmware
  */
@@ -789,13 +797,17 @@ struct qlcnic_mac_list_s {
 #define QLCNIC_H2C_OPCODE_LRO_REQUEST			0x7
 #define QLCNIC_H2C_OPCODE_SET_MAC_RECEIVE_MODE		0xc
 #define QLCNIC_H2C_OPCODE_CONFIG_IPADDR		0x12
+
 #define QLCNIC_H2C_OPCODE_GET_LINKEVENT		0x15
 #define QLCNIC_H2C_OPCODE_CONFIG_BRIDGING		0x17
 #define QLCNIC_H2C_OPCODE_CONFIG_HW_LRO		0x18
+#define QLCNIC_H2C_OPCODE_CONFIG_LOOPBACK		0x13
+
 /*
  * Firmware --> Driver
  */
 
+#define QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK		0x8f
 #define QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE	141
 
 #define VPORT_MISS_MODE_DROP		0 /* drop all unmatched */
@@ -1430,6 +1442,12 @@ int qlcnic_send_lro_cleanup(struct qlcnic_adapter *adapter);
 void qlcnic_update_cmd_producer(struct qlcnic_adapter *adapter,
 		struct qlcnic_host_tx_ring *tx_ring);
 void qlcnic_fetch_mac(struct qlcnic_adapter *, u32, u32, u8, u8 *);
+void qlcnic_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring);
+void qlcnic_clear_lb_mode(struct qlcnic_adapter *adapter);
+int qlcnic_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode);
+
+/* Functions from qlcnic_ethtool.c */
+int qlcnic_check_loopback_buff(unsigned char *data, u8 mac[]);
 
 /* Functions from qlcnic_main.c */
 int qlcnic_reset_context(struct qlcnic_adapter *);
diff --git a/drivers/net/qlcnic/qlcnic_ethtool.c b/drivers/net/qlcnic/qlcnic_ethtool.c
index 31f5cba..743035e 100644
--- a/drivers/net/qlcnic/qlcnic_ethtool.c
+++ b/drivers/net/qlcnic/qlcnic_ethtool.c
@@ -84,7 +84,8 @@ static const char qlcnic_device_gstrings_stats[][ETH_GSTRING_LEN] = {
 static const char qlcnic_gstrings_test[][ETH_GSTRING_LEN] = {
 	"Register_Test_on_offline",
 	"Link_Test_on_offline",
-	"Interrupt_Test_offline"
+	"Interrupt_Test_offline",
+	"Loopback_Test_offline"
 };
 
 #define QLCNIC_TEST_LEN	ARRAY_SIZE(qlcnic_gstrings_test)
@@ -685,6 +686,123 @@ clear_it:
 	return ret;
 }
 
+#define QLCNIC_ILB_PKT_SIZE 64
+#define QLCNIC_NUM_ILB_PKT	16
+#define QLCNIC_ILB_MAX_RCV_LOOP 10
+
+static void qlcnic_create_loopback_buff(unsigned char *data, u8 mac[])
+{
+	unsigned char random_data[] = {0xa8, 0x06, 0x45, 0x00};
+
+	memset(data, 0x4e, QLCNIC_ILB_PKT_SIZE);
+
+	memcpy(data, mac, ETH_ALEN);
+	memcpy(data + ETH_ALEN, mac, ETH_ALEN);
+
+	memcpy(data + 2 * ETH_ALEN, random_data, sizeof(random_data));
+}
+
+int qlcnic_check_loopback_buff(unsigned char *data, u8 mac[])
+{
+	unsigned char buff[QLCNIC_ILB_PKT_SIZE];
+	qlcnic_create_loopback_buff(buff, mac);
+	return memcmp(data, buff, QLCNIC_ILB_PKT_SIZE);
+}
+
+static int qlcnic_do_ilb_test(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
+	struct qlcnic_host_sds_ring *sds_ring = &recv_ctx->sds_rings[0];
+	struct sk_buff *skb;
+	int i, loop, cnt = 0;
+
+	for (i = 0; i < QLCNIC_NUM_ILB_PKT; i++) {
+		skb = dev_alloc_skb(QLCNIC_ILB_PKT_SIZE);
+		qlcnic_create_loopback_buff(skb->data, adapter->mac_addr);
+		skb_put(skb, QLCNIC_ILB_PKT_SIZE);
+
+		adapter->diag_cnt = 0;
+		qlcnic_xmit_frame(skb, adapter->netdev);
+
+		loop = 0;
+		do {
+			msleep(1);
+			qlcnic_process_rcv_ring_diag(sds_ring);
+			if (loop++ > QLCNIC_ILB_MAX_RCV_LOOP)
+				break;
+		} while (!adapter->diag_cnt);
+
+		dev_kfree_skb_any(skb);
+
+		if (!adapter->diag_cnt)
+			dev_warn(&adapter->pdev->dev, "ILB Test: %dth packet"
+				" not recevied\n", i + 1);
+		else
+			cnt++;
+	}
+	if (cnt != i) {
+		dev_warn(&adapter->pdev->dev, "ILB Test failed\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int qlcnic_iloopback_test(struct net_device *netdev)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	int max_sds_rings = adapter->max_sds_rings;
+	struct qlcnic_host_sds_ring *sds_ring;
+	int loop = 0;
+	int ret;
+
+	netdev_info(netdev, "%s:  in progress\n", __func__);
+	if (adapter->op_mode == QLCNIC_NON_PRIV_FUNC) {
+		netdev_warn(netdev, "Loopback test not supported for non "
+				"privilege function\n");
+		return 0;
+	}
+
+	if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
+		return -EIO;
+
+
+	ret = qlcnic_diag_alloc_res(netdev, QLCNIC_LOOPBACK_TEST);
+	if (ret)
+		goto clear_it;
+
+	sds_ring = &adapter->recv_ctx->sds_rings[0];
+
+	ret = qlcnic_set_lb_mode(adapter, QLCNIC_ILB_MODE);
+	if (ret)
+		goto free_res;
+
+	do {
+		msleep(500);
+		qlcnic_process_rcv_ring_diag(sds_ring);
+		if (loop++ > QLCNIC_ILB_MAX_RCV_LOOP)
+			break;
+	} while (!QLCNIC_IS_LB_CONFIGURED(adapter->ahw->loopback_state));
+
+	if (!QLCNIC_IS_LB_CONFIGURED(adapter->ahw->loopback_state)) {
+		netdev_info(netdev, "firmware didnt respond to loopback "
+				"configure request\n");
+		ret = adapter->ahw->loopback_state;
+		goto free_res;
+	}
+
+	ret = qlcnic_do_ilb_test(adapter);
+
+	qlcnic_clear_lb_mode(adapter);
+
+ free_res:
+	qlcnic_diag_free_res(netdev, max_sds_rings);
+
+ clear_it:
+	adapter->max_sds_rings = max_sds_rings;
+	clear_bit(__QLCNIC_RESETTING, &adapter->state);
+	return ret;
+}
+
 static void
 qlcnic_diag_test(struct net_device *dev, struct ethtool_test *eth_test,
 		     u64 *data)
@@ -704,6 +822,9 @@ qlcnic_diag_test(struct net_device *dev, struct ethtool_test *eth_test,
 		if (data[2])
 			eth_test->flags |= ETH_TEST_FL_FAILED;
 
+		data[3] = qlcnic_iloopback_test(dev);
+		if (data[3])
+			eth_test->flags |= ETH_TEST_FL_FAILED;
 
 	}
 }
diff --git a/drivers/net/qlcnic/qlcnic_hw.c b/drivers/net/qlcnic/qlcnic_hw.c
index 81de563..0391a04 100644
--- a/drivers/net/qlcnic/qlcnic_hw.c
+++ b/drivers/net/qlcnic/qlcnic_hw.c
@@ -533,6 +533,56 @@ void qlcnic_delete_lb_filters(struct qlcnic_adapter *adapter)
 	}
 }
 
+int qlcnic_set_fw_loopback(struct qlcnic_adapter *adapter, u8 flag)
+{
+	struct qlcnic_nic_req req;
+	int rv;
+
+	memset(&req, 0, sizeof(struct qlcnic_nic_req));
+
+	req.qhdr = cpu_to_le64(QLCNIC_HOST_REQUEST << 23);
+	req.req_hdr = cpu_to_le64(QLCNIC_H2C_OPCODE_CONFIG_LOOPBACK |
+		((u64) adapter->portnum << 16) | ((u64) 0x1 << 32));
+
+	req.words[0] = cpu_to_le64(flag);
+
+	rv = qlcnic_send_cmd_descs(adapter, (struct cmd_desc_type0 *)&req, 1);
+	if (rv != 0)
+		dev_err(&adapter->pdev->dev, "%sting loopback mode failed\n",
+				flag ? "Set" : "Reset");
+	return rv;
+}
+
+int qlcnic_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
+{
+	if (qlcnic_set_fw_loopback(adapter, mode))
+		return -EIO;
+
+	if (qlcnic_nic_set_promisc(adapter, VPORT_MISS_MODE_ACCEPT_ALL)) {
+		qlcnic_set_fw_loopback(adapter, mode);
+		return -EIO;
+	}
+
+	msleep(1000);
+	return 0;
+}
+
+void qlcnic_clear_lb_mode(struct qlcnic_adapter *adapter)
+{
+	int mode = VPORT_MISS_MODE_DROP;
+	struct net_device *netdev = adapter->netdev;
+
+	qlcnic_set_fw_loopback(adapter, 0);
+
+	if (netdev->flags & IFF_PROMISC)
+		mode = VPORT_MISS_MODE_ACCEPT_ALL;
+	else if (netdev->flags & IFF_ALLMULTI)
+		mode = VPORT_MISS_MODE_ACCEPT_MULTI;
+
+	qlcnic_nic_set_promisc(adapter, mode);
+	msleep(1000);
+}
+
 /*
  * Send the interrupt coalescing parameter set by ethtool to the card.
  */
diff --git a/drivers/net/qlcnic/qlcnic_init.c b/drivers/net/qlcnic/qlcnic_init.c
index 5b8bbcf..9d5bee0 100644
--- a/drivers/net/qlcnic/qlcnic_init.c
+++ b/drivers/net/qlcnic/qlcnic_init.c
@@ -1281,6 +1281,7 @@ qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 	u16 cable_len;
 	u16 link_speed;
 	u8  link_status, module, duplex, autoneg;
+	u8 lb_status = 0;
 	struct net_device *netdev = adapter->netdev;
 
 	adapter->has_link_events = 1;
@@ -1292,6 +1293,7 @@ qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 	link_status = msg->body[2] & 0xff;
 	duplex = (msg->body[2] >> 16) & 0xff;
 	autoneg = (msg->body[2] >> 24) & 0xff;
+	lb_status = (msg->body[2] >> 32) & 0x3;
 
 	module = (msg->body[2] >> 8) & 0xff;
 	if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
@@ -1301,6 +1303,9 @@ qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 		dev_info(&netdev->dev, "unsupported cable length %d\n",
 				cable_len);
 
+	if (!link_status && (lb_status == 1))
+		adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
+
 	qlcnic_advert_link_change(adapter, link_status);
 
 	if (duplex == LINKEVENT_FULL_DUPLEX)
@@ -1319,7 +1324,9 @@ qlcnic_handle_fw_message(int desc_cnt, int index,
 {
 	struct qlcnic_fw_msg msg;
 	struct status_desc *desc;
-	int i = 0, opcode;
+	struct qlcnic_adapter *adapter;
+	struct device *dev;
+	int i = 0, opcode, ret;
 
 	while (desc_cnt > 0 && i < 8) {
 		desc = &sds_ring->desc_head[index];
@@ -1330,10 +1337,28 @@ qlcnic_handle_fw_message(int desc_cnt, int index,
 		desc_cnt--;
 	}
 
+	adapter = sds_ring->adapter;
+	dev = &adapter->pdev->dev;
 	opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
+
 	switch (opcode) {
 	case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
-		qlcnic_handle_linkevent(sds_ring->adapter, &msg);
+		qlcnic_handle_linkevent(adapter, &msg);
+		break;
+	case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
+		ret = (u32)(msg.body[1]);
+		switch (ret) {
+		case 0:
+			adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
+			break;
+		case 1:
+			dev_info(dev, "loopback already in progress\n");
+			break;
+		default:
+			dev_info(dev, "loopback configure request failed,"
+					" ret %x\n", ret);
+			break;
+		}
 		break;
 	default:
 		break;
@@ -1746,6 +1771,103 @@ qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 	spin_unlock(&rds_ring->lock);
 }
 
+static void dump_skb(struct sk_buff *skb)
+{
+	int i;
+	unsigned char *data = skb->data;
+
+	printk(KERN_INFO "\n");
+	for (i = 0; i < skb->len; i++) {
+		printk(KERN_INFO "%02x ", data[i]);
+		if ((i & 0x0f) == 8)
+			printk(KERN_INFO "\n");
+	}
+}
+
+void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_sds_ring *sds_ring,
+		int ring, u64 sts_data0)
+{
+	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
+	struct sk_buff *skb;
+	struct qlcnic_host_rds_ring *rds_ring;
+	int index, length, cksum, pkt_offset;
+
+	if (unlikely(ring >= adapter->max_rds_rings))
+		return;
+
+	rds_ring = &recv_ctx->rds_rings[ring];
+
+	index = qlcnic_get_sts_refhandle(sts_data0);
+	length = qlcnic_get_sts_totallength(sts_data0);
+	if (unlikely(index >= rds_ring->num_desc))
+		return;
+
+	cksum  = qlcnic_get_sts_status(sts_data0);
+	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
+
+	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
+	if (!skb)
+		return;
+
+	if (length > rds_ring->skb_size)
+		skb_put(skb, rds_ring->skb_size);
+	else
+		skb_put(skb, length);
+
+	if (pkt_offset)
+		skb_pull(skb, pkt_offset);
+
+	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
+		adapter->diag_cnt++;
+	else
+		dump_skb(skb);
+
+	dev_kfree_skb_any(skb);
+	adapter->stats.rx_pkts++;
+	adapter->stats.rxbytes += length;
+
+	return;
+}
+
+void
+qlcnic_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
+{
+	struct qlcnic_adapter *adapter = sds_ring->adapter;
+	struct status_desc *desc;
+	u64 sts_data0;
+	int ring, opcode, desc_cnt;
+
+	u32 consumer = sds_ring->consumer;
+
+	desc = &sds_ring->desc_head[consumer];
+	sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
+
+	if (!(sts_data0 & STATUS_OWNER_HOST))
+		return;
+
+	desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
+	opcode = qlcnic_get_sts_opcode(sts_data0);
+	switch (opcode) {
+	case QLCNIC_RESPONSE_DESC:
+		qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
+		break;
+	default:
+		ring = qlcnic_get_sts_type(sts_data0);
+		qlcnic_process_rcv_diag(adapter, sds_ring, ring, sts_data0);
+		break;
+	}
+
+	for (; desc_cnt > 0; desc_cnt--) {
+		desc = &sds_ring->desc_head[consumer];
+		desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
+		consumer = get_next_index(consumer, sds_ring->num_desc);
+	}
+
+	sds_ring->consumer = consumer;
+	writel(consumer, sds_ring->crb_sts_consumer);
+}
+
 void
 qlcnic_fetch_mac(struct qlcnic_adapter *adapter, u32 off1, u32 off2,
 			u8 alt_mac, u8 *mac)
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index ac7f8a2..357436b 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -1391,6 +1391,12 @@ int qlcnic_diag_alloc_res(struct net_device *netdev, int test)
 			qlcnic_enable_int(sds_ring);
 		}
 	}
+
+	if (adapter->diag_test == QLCNIC_LOOPBACK_TEST) {
+		adapter->ahw->loopback_state = 0;
+		qlcnic_linkevent_request(adapter, 1);
+	}
+
 	set_bit(__QLCNIC_DEV_UP, &adapter->state);
 
 	return 0;
-- 
1.7.4.1