Date:	Sat,  9 Feb 2013 14:29:51 -0500
From:	Jitendra Kalsaria <jitendra.kalsaria@...gic.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, sony.chacko@...gic.com,
	Dept_NX_Linux_NIC_Driver@...gic.com,
	Jitendra Kalsaria <jitendra.kalsaria@...gic.com>
Subject: [net-next PATCH 4/8] qlcnic: refactor 83xx diagnostic loopback test

From: Jitendra Kalsaria <jitendra.kalsaria@...gic.com>

Cleanly separate 83xx diagnostic loopback test routines from 82xx

Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@...gic.com>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic.h        |    4 +-
 .../net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c    |  147 +++++++++++++++++++-
 .../net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h    |    1 +
 .../net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c    |   28 +---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c   |   10 +-
 5 files changed, 158 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
index 3a840e7..61b594c 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
@@ -1442,7 +1442,9 @@ int qlcnic_send_lro_cleanup(struct qlcnic_adapter *adapter);
 void qlcnic_update_cmd_producer(struct qlcnic_host_tx_ring *);
 
 /* Functions from qlcnic_ethtool.c */
-int qlcnic_check_loopback_buff(unsigned char *data, u8 mac[]);
+int qlcnic_check_loopback_buff(unsigned char *, u8 []);
+int qlcnic_do_lb_test(struct qlcnic_adapter *, u8);
+int qlcnic_loopback_test(struct net_device *, u8);
 
 /* Functions from qlcnic_main.c */
 int qlcnic_reset_context(struct qlcnic_adapter *);
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
index 3d628c6..3d48131 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
@@ -257,8 +257,6 @@ static struct qlcnic_hardware_ops qlcnic_83xx_hw_ops = {
 	.config_intr_coal		= qlcnic_83xx_config_intr_coal,
 	.config_rss			= qlcnic_83xx_config_rss,
 	.config_hw_lro			= qlcnic_83xx_config_hw_lro,
-	.config_loopback		= qlcnic_83xx_set_lb_mode,
-	.clear_loopback			= qlcnic_83xx_clear_lb_mode,
 	.config_promisc_mode		= qlcnic_83xx_nic_set_promisc,
 	.change_l2_filter		= qlcnic_83xx_change_l2_filter,
 	.get_board_info			= qlcnic_83xx_get_port_info,
@@ -1118,6 +1116,100 @@ out:
 	return err;
 }
 
+static int qlcnic_83xx_diag_alloc_res(struct net_device *netdev, int test)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_host_sds_ring *sds_ring;
+	struct qlcnic_host_rds_ring *rds_ring;
+	u8 ring;
+	int ret;
+
+	netif_device_detach(netdev);
+
+	if (netif_running(netdev))
+		__qlcnic_down(adapter, netdev);
+
+	qlcnic_detach(adapter);
+
+	adapter->max_sds_rings = 1;
+	adapter->ahw->diag_test = test;
+	adapter->ahw->linkup = 0;
+
+	ret = qlcnic_attach(adapter);
+	if (ret) {
+		netif_device_attach(netdev);
+		return ret;
+	}
+
+	ret = qlcnic_fw_create_ctx(adapter);
+	if (ret) {
+		qlcnic_detach(adapter);
+		netif_device_attach(netdev);
+		return ret;
+	}
+
+	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
+		rds_ring = &adapter->recv_ctx->rds_rings[ring];
+		qlcnic_post_rx_buffers(adapter, rds_ring, ring);
+	}
+
+	if (adapter->ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
+		for (ring = 0; ring < adapter->max_sds_rings; ring++) {
+			sds_ring = &adapter->recv_ctx->sds_rings[ring];
+			qlcnic_83xx_enable_intr(adapter, sds_ring);
+		}
+	}
+
+	if (adapter->ahw->diag_test == QLCNIC_LOOPBACK_TEST) {
+		/* disable and free mailbox interrupt */
+		qlcnic_83xx_free_mbx_intr(adapter);
+		adapter->ahw->loopback_state = 0;
+		adapter->ahw->hw_ops->setup_link_event(adapter, 1);
+	}
+
+	set_bit(__QLCNIC_DEV_UP, &adapter->state);
+	return 0;
+}
+
+static void qlcnic_83xx_diag_free_res(struct net_device *netdev,
+					int max_sds_rings)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_host_sds_ring *sds_ring;
+	int ring, err;
+
+	clear_bit(__QLCNIC_DEV_UP, &adapter->state);
+	if (adapter->ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
+		for (ring = 0; ring < adapter->max_sds_rings; ring++) {
+			sds_ring = &adapter->recv_ctx->sds_rings[ring];
+			writel(1, sds_ring->crb_intr_mask);
+		}
+	}
+
+	qlcnic_fw_destroy_ctx(adapter);
+	qlcnic_detach(adapter);
+
+	if (adapter->ahw->diag_test == QLCNIC_LOOPBACK_TEST) {
+		err = qlcnic_83xx_setup_mbx_intr(adapter);
+		if (err) {
+			dev_err(&adapter->pdev->dev,
+				"%s: failed to setup mbx interrupt\n",
+				__func__);
+			goto out;
+		}
+	}
+	adapter->ahw->diag_test = 0;
+	adapter->max_sds_rings = max_sds_rings;
+
+	if (qlcnic_attach(adapter))
+		goto out;
+
+	if (netif_running(netdev))
+		__qlcnic_up(adapter, netdev);
+out:
+	netif_device_attach(netdev);
+}
+
 int qlcnic_83xx_config_led(struct qlcnic_adapter *adapter, u32 state,
 			   u32 beacon)
 {
@@ -1265,6 +1357,57 @@ int qlcnic_83xx_nic_set_promisc(struct qlcnic_adapter *adapter, u32 mode)
 	return err;
 }
 
+int qlcnic_83xx_loopback_test(struct net_device *netdev, u8 mode)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
+	int ret = 0, loop = 0, max_sds_rings = adapter->max_sds_rings;
+
+	QLCDB(adapter, DRV, "%s loopback test in progress\n",
+	      mode == QLCNIC_ILB_MODE ? "internal" : "external");
+	if (ahw->op_mode == QLCNIC_NON_PRIV_FUNC) {
+		dev_warn(&adapter->pdev->dev,
+			 "Loopback test not supported for non privilege function\n");
+		return ret;
+	}
+
+	if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
+		return -EBUSY;
+
+	ret = qlcnic_83xx_diag_alloc_res(netdev, QLCNIC_LOOPBACK_TEST);
+	if (ret)
+		goto fail_diag_alloc;
+
+	ret = qlcnic_83xx_set_lb_mode(adapter, mode);
+	if (ret)
+		goto free_diag_res;
+
+	/* Poll for link up event before running traffic */
+	do {
+		msleep(500);
+		qlcnic_83xx_process_aen(adapter);
+		if (loop++ > QLCNIC_ILB_MAX_RCV_LOOP) {
+			dev_info(&adapter->pdev->dev,
+				 "Firmware didn't sent link up event to loopback request\n");
+			ret = -QLCNIC_FW_NOT_RESPOND;
+			qlcnic_83xx_clear_lb_mode(adapter, mode);
+			goto free_diag_res;
+		}
+	} while ((adapter->ahw->linkup && ahw->has_link_events) != 1);
+
+	ret = qlcnic_do_lb_test(adapter, mode);
+
+	qlcnic_83xx_clear_lb_mode(adapter, mode);
+
+free_diag_res:
+	qlcnic_83xx_diag_free_res(netdev, max_sds_rings);
+
+fail_diag_alloc:
+	adapter->max_sds_rings = max_sds_rings;
+	clear_bit(__QLCNIC_RESETTING, &adapter->state);
+	return ret;
+}
+
 int qlcnic_83xx_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
 {
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h
index 16c5df6..87f2e08 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h
@@ -428,6 +428,7 @@ int qlcnic_83xx_test_link(struct qlcnic_adapter *);
 int qlcnic_83xx_reg_test(struct qlcnic_adapter *);
 int qlcnic_83xx_get_regs_len(struct qlcnic_adapter *);
 int qlcnic_83xx_get_registers(struct qlcnic_adapter *, u32 *);
+int qlcnic_83xx_loopback_test(struct net_device *, u8);
 int qlcnic_83xx_interrupt_test(struct qlcnic_adapter *,
 			       struct qlcnic_cmd_args *);
 int qlcnic_83xx_flash_test(struct qlcnic_adapter *);
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
index 6320d55..58e2554 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
@@ -883,7 +883,7 @@ int qlcnic_check_loopback_buff(unsigned char *data, u8 mac[])
 	return memcmp(data, buff, QLCNIC_ILB_PKT_SIZE);
 }
 
-static int qlcnic_do_lb_test(struct qlcnic_adapter *adapter, u8 mode)
+int qlcnic_do_lb_test(struct qlcnic_adapter *adapter, u8 mode)
 {
 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
 	struct qlcnic_host_sds_ring *sds_ring = &recv_ctx->sds_rings[0];
@@ -925,7 +925,7 @@ static int qlcnic_do_lb_test(struct qlcnic_adapter *adapter, u8 mode)
 	return 0;
 }
 
-static int qlcnic_loopback_test(struct net_device *netdev, u8 mode)
+int qlcnic_loopback_test(struct net_device *netdev, u8 mode)
 {
 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
 	int max_sds_rings = adapter->max_sds_rings;
@@ -935,13 +935,14 @@ static int qlcnic_loopback_test(struct net_device *netdev, u8 mode)
 	int ret;
 
 	if (qlcnic_83xx_check(adapter))
-		goto skip_cap;
+		return qlcnic_83xx_loopback_test(netdev, mode);
+
 	if (!(ahw->capabilities & QLCNIC_FW_CAPABILITY_MULTI_LOOPBACK)) {
 		dev_info(&adapter->pdev->dev,
 			 "Firmware do not support loopback test\n");
 		return -EOPNOTSUPP;
 	}
-skip_cap:
+
 	dev_warn(&adapter->pdev->dev, "%s loopback test in progress\n",
 		 mode == QLCNIC_ILB_MODE ? "internal" : "external");
 	if (ahw->op_mode == QLCNIC_NON_PRIV_FUNC) {
@@ -962,9 +963,6 @@ skip_cap:
 	if (ret)
 		goto free_res;
 
-	if (qlcnic_83xx_check(adapter))
-		goto skip_fw_msg;
-
 	ahw->diag_cnt = 0;
 	do {
 		msleep(500);
@@ -979,21 +977,9 @@ skip_cap:
 			goto free_res;
 		}
 	} while (!QLCNIC_IS_LB_CONFIGURED(ahw->loopback_state));
-skip_fw_msg:
-	if (qlcnic_83xx_check(adapter)) {
-		/* wait until firmware report link up before running traffic */
-		loop = 0;
-		do {
-			msleep(500);
-			if (loop++ > QLCNIC_ILB_MAX_RCV_LOOP) {
-				dev_info(&adapter->pdev->dev,
-					 "No linkup event after LB req\n");
-				ret = -QLCNIC_FW_NOT_RESPOND;
-				goto free_res;
-			}
-		} while ((adapter->ahw->linkup && ahw->has_link_events) != 1);
-	}
+
 	ret = qlcnic_do_lb_test(adapter, mode);
+
 	qlcnic_clear_lb_mode(adapter, mode);
 
  free_res:
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index dcb990d..30aa1f2 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -1503,10 +1503,7 @@ void qlcnic_diag_free_res(struct net_device *netdev, int max_sds_rings)
 	if (adapter->ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
 		for (ring = 0; ring < adapter->max_sds_rings; ring++) {
 			sds_ring = &adapter->recv_ctx->sds_rings[ring];
-			if (qlcnic_83xx_check(adapter))
-				writel(1, sds_ring->crb_intr_mask);
-			else
-				qlcnic_disable_int(sds_ring);
+			qlcnic_disable_int(sds_ring);
 		}
 	}
 
@@ -1599,10 +1596,7 @@ int qlcnic_diag_alloc_res(struct net_device *netdev, int test)
 	if (adapter->ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
 		for (ring = 0; ring < adapter->max_sds_rings; ring++) {
 			sds_ring = &adapter->recv_ctx->sds_rings[ring];
-			if (qlcnic_82xx_check(adapter))
-				qlcnic_enable_int(sds_ring);
-			else
-				qlcnic_83xx_enable_intr(adapter, sds_ring);
+			qlcnic_enable_int(sds_ring);
 		}
 	}
 
-- 
1.7.1

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