be2net: Add error recovery during load for Lancer

Add error recovery during load for Lancer

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: Subramanian Seetharaman <subbu.seetharaman@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 68 insertions, 0 deletions

diff --git a/drivers/net/benet/be_hw.h b/drivers/net/benet/be_hw.h
index 3f459f76cd1d..dbe67f353e8f 100644
--- a/drivers/net/benet/be_hw.h
+++ b/drivers/net/benet/be_hw.h
@@ -44,6 +44,18 @@
 #define POST_STAGE_BE_RESET             0x3 /* Host wants to reset chip */
 #define POST_STAGE_ARMFW_RDY            0xc000  /* FW is done with POST */
 
+
+/* Lancer SLIPORT_CONTROL SLIPORT_STATUS registers */
+#define SLIPORT_STATUS_OFFSET           0x404
+#define SLIPORT_CONTROL_OFFSET          0x408
+
+#define SLIPORT_STATUS_ERR_MASK         0x80000000
+#define SLIPORT_STATUS_RN_MASK          0x01000000
+#define SLIPORT_STATUS_RDY_MASK         0x00800000
+
+
+#define SLI_PORT_CONTROL_IP_MASK        0x08000000
+
 /********* Memory BAR register ************/
 #define PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET      0xfc
 /* Host Interrupt Enable, if set interrupts are enabled although "PCI Interrupt
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index ac7ae21bd0d1..665a9b7310f6 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -2901,6 +2901,54 @@ static int be_dev_family_check(struct be_adapter *adapter)
         return 0;
 }
 
+static int lancer_wait_ready(struct be_adapter *adapter)
+{
+#define SLIPORT_READY_TIMEOUT 500
+        u32 sliport_status;
+        int status = 0, i;
+
+        for (i = 0; i < SLIPORT_READY_TIMEOUT; i++) {
+                sliport_status = ioread32(adapter->db + SLIPORT_STATUS_OFFSET);
+                if (sliport_status & SLIPORT_STATUS_RDY_MASK)
+                        break;
+
+                msleep(20);
+        }
+
+        if (i == SLIPORT_READY_TIMEOUT)
+                status = -1;
+
+        return status;
+}
+
+static int lancer_test_and_set_rdy_state(struct be_adapter *adapter)
+{
+        int status;
+        u32 sliport_status, err, reset_needed;
+        status = lancer_wait_ready(adapter);
+        if (!status) {
+                sliport_status = ioread32(adapter->db + SLIPORT_STATUS_OFFSET);
+                err = sliport_status & SLIPORT_STATUS_ERR_MASK;
+                reset_needed = sliport_status & SLIPORT_STATUS_RN_MASK;
+                if (err && reset_needed) {
+                        iowrite32(SLI_PORT_CONTROL_IP_MASK,
+                                        adapter->db + SLIPORT_CONTROL_OFFSET);
+
+                        /* check adapter has corrected the error */
+                        status = lancer_wait_ready(adapter);
+                        sliport_status = ioread32(adapter->db +
+                                                        SLIPORT_STATUS_OFFSET);
+                        sliport_status &= (SLIPORT_STATUS_ERR_MASK |
+                                                SLIPORT_STATUS_RN_MASK);
+                        if (status || sliport_status)
+                                status = -1;
+                } else if (err || reset_needed) {
+                        status = -1;
+                }
+        }
+        return status;
+}
+
 static int __devinit be_probe(struct pci_dev *pdev,
                         const struct pci_device_id *pdev_id)
 {
@@ -2950,6 +2998,14 @@ static int __devinit be_probe(struct pci_dev *pdev,
         if (status)
                 goto free_netdev;
 
+        if (lancer_chip(adapter)) {
+                status = lancer_test_and_set_rdy_state(adapter);
+                if (status) {
+                        dev_err(&pdev->dev, "Adapter in non recoverable error\n");
+                        goto free_netdev;
+                }
+        }
+
         /* sync up with fw's ready state */
         if (be_physfn(adapter)) {
                 status = be_cmd_POST(adapter);