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Message-Id: <20190228100316.9411-1-arjun@chelsio.com>
Date: Thu, 28 Feb 2019 15:33:16 +0530
From: Arjun Vynipadath <arjun@...lsio.com>
To: netdev@...r.kernel.org, davem@...emloft.net
Cc: nirranjan@...lsio.com, indranil@...lsio.com, dt@...lsio.com,
Arjun Vynipadath <arjun@...lsio.com>,
Vishal Kulkarni <vishal@...lsio.com>
Subject: [PATCH net-next] cxgb4vf: Enter debugging mode if FW is inaccessible
If we are not able to reach firmware, enter debugging mode that will
help us to get adapter logs.
Signed-off-by: Arjun Vynipadath <arjun@...lsio.com>
Signed-off-by: Vishal Kulkarni <vishal@...lsio.com>
---
drivers/net/ethernet/chelsio/cxgb4vf/adapter.h | 1 +
.../net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 45 +++++++++++++++-------
2 files changed, 33 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
index 26f48a14d2f9..86cf68fceceb 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
@@ -411,6 +411,7 @@ enum { /* adapter flags */
USING_MSIX = (1UL << 2),
QUEUES_BOUND = (1UL << 3),
ROOT_NO_RELAXED_ORDERING = (1UL << 4),
+ FW_OK = (1UL << 5),
};
/*
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index d22df0f6c088..99b22670db3d 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -845,6 +845,13 @@ static int cxgb4vf_open(struct net_device *dev)
struct adapter *adapter = pi->adapter;
/*
+ * If we don't have a connection to the firmware there's nothing we
+ * can do.
+ */
+ if (!(adapter->flags & FW_OK))
+ return -ENXIO;
+
+ /*
* If this is the first interface that we're opening on the "adapter",
* bring the "adapter" up now.
*/
@@ -2720,6 +2727,7 @@ static int adap_init0(struct adapter *adapter)
*/
size_nports_qsets(adapter);
+ adapter->flags |= FW_OK;
return 0;
}
@@ -3084,7 +3092,9 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
err = adap_init0(adapter);
if (err)
- goto err_unmap_bar;
+ dev_err(&pdev->dev,
+ "Adapter initialization failed, error %d. Continuing in debug mode\n",
+ err);
/* Initialize hash mac addr list */
INIT_LIST_HEAD(&adapter->mac_hlist);
@@ -3109,13 +3119,6 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
break;
port_id = ffs(pmask) - 1;
pmask &= ~(1 << port_id);
- viid = t4vf_alloc_vi(adapter, port_id);
- if (viid < 0) {
- dev_err(&pdev->dev, "cannot allocate VI for port %d:"
- " err=%d\n", port_id, viid);
- err = viid;
- goto err_free_dev;
- }
/*
* Allocate our network device and stitch things together.
@@ -3123,7 +3126,6 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
netdev = alloc_etherdev_mq(sizeof(struct port_info),
MAX_PORT_QSETS);
if (netdev == NULL) {
- t4vf_free_vi(adapter, viid);
err = -ENOMEM;
goto err_free_dev;
}
@@ -3133,7 +3135,6 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
pi->adapter = adapter;
pi->pidx = pidx;
pi->port_id = port_id;
- pi->viid = viid;
/*
* Initialize the starting state of our "port" and register
@@ -3159,6 +3160,23 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
netdev->dev_port = pi->port_id;
/*
+ * If we haven't been able to contact the firmware, there's
+ * nothing else we can do for this "port" ...
+ */
+ if (!(adapter->flags & FW_OK))
+ continue;
+
+ viid = t4vf_alloc_vi(adapter, port_id);
+ if (viid < 0) {
+ dev_err(&pdev->dev,
+ "cannot allocate VI for port %d: err=%d\n",
+ port_id, viid);
+ err = viid;
+ goto err_free_dev;
+ }
+ pi->viid = viid;
+
+ /*
* Initialize the hardware/software state for the port.
*/
err = t4vf_port_init(adapter, pidx);
@@ -3302,13 +3320,13 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
if (netdev == NULL)
continue;
pi = netdev_priv(netdev);
- t4vf_free_vi(adapter, pi->viid);
+ if (pi->viid)
+ t4vf_free_vi(adapter, pi->viid);
if (test_bit(pidx, &adapter->registered_device_map))
unregister_netdev(netdev);
free_netdev(netdev);
}
-err_unmap_bar:
if (!is_t4(adapter->params.chip))
iounmap(adapter->bar2);
@@ -3381,7 +3399,8 @@ static void cxgb4vf_pci_remove(struct pci_dev *pdev)
continue;
pi = netdev_priv(netdev);
- t4vf_free_vi(adapter, pi->viid);
+ if (pi->viid)
+ t4vf_free_vi(adapter, pi->viid);
free_netdev(netdev);
}
iounmap(adapter->regs);
--
2.9.5
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