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Message-ID: <20140918223710.10373.92771.stgit@ahduyck-bv4.jf.intel.com>
Date: Thu, 18 Sep 2014 18:37:17 -0400
From: Alexander Duyck <alexander.h.duyck@...el.com>
To: davem@...emloft.net
Cc: nhorman@...hat.com, netdev@...r.kernel.org,
john.fastabend@...il.com, matthew.vick@...el.com,
jeffrey.t.kirsher@...el.com, sassmann@...hat.com
Subject: [net-next PATCH 11/29] fm10k: Add support for ndo_open/stop
Add support for brining the interface up/down. This is still primitive yet
as we have not yet added support for the descriptor queues.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
---
drivers/net/ethernet/intel/fm10k/fm10k.h | 4 +
drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 68 +++++++++++++++++++++++
drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 45 +++++++++++++++
3 files changed, 117 insertions(+)
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h
index 33256fa..c26dc75 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k.h
@@ -130,9 +130,13 @@ extern const char fm10k_driver_version[];
/* PCI */
int fm10k_register_pci_driver(void);
void fm10k_unregister_pci_driver(void);
+void fm10k_up(struct fm10k_intfc *interface);
+void fm10k_down(struct fm10k_intfc *interface);
/* Netdev */
struct net_device *fm10k_alloc_netdev(void);
void fm10k_restore_rx_state(struct fm10k_intfc *);
void fm10k_reset_rx_state(struct fm10k_intfc *);
+int fm10k_open(struct net_device *netdev);
+int fm10k_close(struct net_device *netdev);
#endif /* _FM10K_H_ */
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index cf7b4f3..ca84898 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -20,6 +20,72 @@
#include "fm10k.h"
+/**
+ * fm10k_request_glort_range - Request GLORTs for use in configuring rules
+ * @interface: board private structure
+ *
+ * This function allocates a range of glorts for this inteface to use.
+ **/
+static void fm10k_request_glort_range(struct fm10k_intfc *interface)
+{
+ struct fm10k_hw *hw = &interface->hw;
+ u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT;
+
+ /* establish GLORT base */
+ interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
+ interface->glort_count = 0;
+
+ /* nothing we can do until mask is allocated */
+ if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE)
+ return;
+
+ interface->glort_count = mask + 1;
+}
+
+/**
+ * fm10k_open - Called when a network interface is made active
+ * @netdev: network interface device structure
+ *
+ * Returns 0 on success, negative value on failure
+ *
+ * The open entry point is called when a network interface is made
+ * active by the system (IFF_UP). At this point all resources needed
+ * for transmit and receive operations are allocated, the interrupt
+ * handler is registered with the OS, the watchdog timer is started,
+ * and the stack is notified that the interface is ready.
+ **/
+int fm10k_open(struct net_device *netdev)
+{
+ struct fm10k_intfc *interface = netdev_priv(netdev);
+
+ /* setup GLORT assignment for this port */
+ fm10k_request_glort_range(interface);
+
+ fm10k_up(interface);
+
+ return 0;
+}
+
+/**
+ * fm10k_close - Disables a network interface
+ * @netdev: network interface device structure
+ *
+ * Returns 0, this is not allowed to fail
+ *
+ * The close entry point is called when an interface is de-activated
+ * by the OS. The hardware is still under the drivers control, but
+ * needs to be disabled. A global MAC reset is issued to stop the
+ * hardware, and all transmit and receive resources are freed.
+ **/
+int fm10k_close(struct net_device *netdev)
+{
+ struct fm10k_intfc *interface = netdev_priv(netdev);
+
+ fm10k_down(interface);
+
+ return 0;
+}
+
static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
{
dev_kfree_skb_any(skb);
@@ -398,6 +464,8 @@ void fm10k_reset_rx_state(struct fm10k_intfc *interface)
}
static const struct net_device_ops fm10k_netdev_ops = {
+ .ndo_open = fm10k_open,
+ .ndo_stop = fm10k_close,
.ndo_validate_addr = eth_validate_addr,
.ndo_start_xmit = fm10k_xmit_frame,
.ndo_set_mac_address = fm10k_set_mac,
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 5fcbd1d..b6d5e72 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -87,6 +87,51 @@ static int fm10k_hw_ready(struct fm10k_intfc *interface)
return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
}
+void fm10k_up(struct fm10k_intfc *interface)
+{
+ struct fm10k_hw *hw = &interface->hw;
+
+ /* Enable Tx/Rx DMA */
+ hw->mac.ops.start_hw(hw);
+
+ /* configure interrupts */
+ hw->mac.ops.update_int_moderator(hw);
+
+ /* clear down bit to indicate we are ready to go */
+ clear_bit(__FM10K_DOWN, &interface->state);
+
+ /* re-establish Rx filters */
+ fm10k_restore_rx_state(interface);
+
+ /* enable transmits */
+ netif_tx_start_all_queues(interface->netdev);
+}
+
+void fm10k_down(struct fm10k_intfc *interface)
+{
+ struct net_device *netdev = interface->netdev;
+ struct fm10k_hw *hw = &interface->hw;
+
+ /* signal that we are down to the interrupt handler and service task */
+ set_bit(__FM10K_DOWN, &interface->state);
+
+ /* call carrier off first to avoid false dev_watchdog timeouts */
+ netif_carrier_off(netdev);
+
+ /* disable transmits */
+ netif_tx_stop_all_queues(netdev);
+ netif_tx_disable(netdev);
+
+ /* reset Rx filters */
+ fm10k_reset_rx_state(interface);
+
+ /* allow 10ms for device to quiesce */
+ usleep_range(10000, 20000);
+
+ /* Disable DMA engine for Tx/Rx */
+ hw->mac.ops.stop_hw(hw);
+}
+
/**
* fm10k_sw_init - Initialize general software structures
* @interface: host interface private structure to initialize
--
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