sfc: Add sysfs entry for flags (link control and primary)

On  every adapter there will be one primary PF per adaptor and
one link control PF per port.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 14c5205200dad2d3773c1a907732949f62c866bb..e659da818c6c849c2097493279795bdf671499f1 100644 (file)
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -246,6 +246,34 @@ static int efx_ef10_get_mac_address_vf(struct efx_nic *efx, u8 *mac_address)
        return 0;
 }
 
+static ssize_t efx_ef10_show_link_control_flag(struct device *dev,
+                                              struct device_attribute *attr,
+                                              char *buf)
+{
+       struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
+
+       return sprintf(buf, "%d\n",
+                      ((efx->mcdi->fn_flags) &
+                       (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL))
+                      ? 1 : 0);
+}
+
+static ssize_t efx_ef10_show_primary_flag(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+       struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
+
+       return sprintf(buf, "%d\n",
+                      ((efx->mcdi->fn_flags) &
+                       (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY))
+                      ? 1 : 0);
+}
+
+static DEVICE_ATTR(link_control_flag, 0444, efx_ef10_show_link_control_flag,
+                  NULL);
+static DEVICE_ATTR(primary_flag, 0444, efx_ef10_show_primary_flag, NULL);
+
 static int efx_ef10_probe(struct efx_nic *efx)
 {
        struct efx_ef10_nic_data *nic_data;
@@ -315,30 +343,39 @@ static int efx_ef10_probe(struct efx_nic *efx)
        if (rc)
                goto fail3;
 
-       rc = efx_ef10_get_pf_index(efx);
+       rc = device_create_file(&efx->pci_dev->dev,
+                               &dev_attr_link_control_flag);
        if (rc)
                goto fail3;
 
+       rc = device_create_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
+       if (rc)
+               goto fail4;
+
+       rc = efx_ef10_get_pf_index(efx);
+       if (rc)
+               goto fail5;
+
        rc = efx_ef10_init_datapath_caps(efx);
        if (rc < 0)
-               goto fail3;
+               goto fail5;
 
        efx->rx_packet_len_offset =
                ES_DZ_RX_PREFIX_PKTLEN_OFST - ES_DZ_RX_PREFIX_SIZE;
 
        rc = efx_mcdi_port_get_number(efx);
        if (rc < 0)
-               goto fail3;
+               goto fail5;
        efx->port_num = rc;
        net_dev->dev_port = rc;
 
        rc = efx->type->get_mac_address(efx, efx->net_dev->perm_addr);
        if (rc)
-               goto fail3;
+               goto fail5;
 
        rc = efx_ef10_get_sysclk_freq(efx);
        if (rc < 0)
-               goto fail3;
+               goto fail5;
        efx->timer_quantum_ns = 1536000 / rc; /* 1536 cycles */
 
        /* Check whether firmware supports bug 35388 workaround.
@@ -357,7 +394,7 @@ static int efx_ef10_probe(struct efx_nic *efx)
                nic_data->workaround_35388 = enabled &
                        MC_CMD_GET_WORKAROUNDS_OUT_BUG35388;
        } else if (rc != -ENOSYS && rc != -ENOENT) {
-               goto fail3;
+               goto fail5;
        }
        netif_dbg(efx, probe, efx->net_dev,
                  "workaround for bug 35388 is %sabled\n",
@@ -365,12 +402,16 @@ static int efx_ef10_probe(struct efx_nic *efx)
 
        rc = efx_mcdi_mon_probe(efx);
        if (rc && rc != -EPERM)
-               goto fail3;
+               goto fail5;
 
        efx_ptp_probe(efx, NULL);
 
        return 0;
 
+fail5:
+       device_remove_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
+fail4:
+       device_remove_file(&efx->pci_dev->dev, &dev_attr_link_control_flag);
 fail3:
        efx_mcdi_fini(efx);
 fail2:
@@ -613,6 +654,9 @@ static void efx_ef10_remove(struct efx_nic *efx)
        if (!nic_data->must_restore_piobufs)
                efx_ef10_free_piobufs(efx);
 
+       device_remove_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
+       device_remove_file(&efx->pci_dev->dev, &dev_attr_link_control_flag);
+
        efx_mcdi_fini(efx);
        efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
        kfree(nic_data);