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igc: Add netdev
Now that we have the ability to configure the basic settings on the device we can start allocating and configuring a netdev for the interface. Signed-off-by: Sasha Neftin <sasha.neftin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin
Jeff Kirsher
parent
146740f9ab
commit
c9a11c23ce
@ -28,15 +28,63 @@
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extern char igc_driver_name[];
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extern char igc_driver_version[];
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/* Transmit and receive queues */
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#define IGC_MAX_RX_QUEUES 4
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#define IGC_MAX_TX_QUEUES 4
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#define MAX_Q_VECTORS 8
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#define MAX_STD_JUMBO_FRAME_SIZE 9216
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enum igc_state_t {
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__IGC_TESTING,
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__IGC_RESETTING,
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__IGC_DOWN,
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__IGC_PTP_TX_IN_PROGRESS,
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};
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struct igc_q_vector {
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struct igc_adapter *adapter; /* backlink */
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struct napi_struct napi;
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};
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struct igc_mac_addr {
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u8 addr[ETH_ALEN];
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u8 queue;
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u8 state; /* bitmask */
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};
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#define IGC_MAC_STATE_DEFAULT 0x1
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#define IGC_MAC_STATE_MODIFIED 0x2
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#define IGC_MAC_STATE_IN_USE 0x4
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/* Board specific private data structure */
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struct igc_adapter {
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struct net_device *netdev;
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unsigned long state;
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unsigned int flags;
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unsigned int num_q_vectors;
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u16 link_speed;
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u16 link_duplex;
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u8 port_num;
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u8 __iomem *io_addr;
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struct work_struct watchdog_task;
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int msg_enable;
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u32 max_frame_size;
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/* OS defined structs */
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struct pci_dev *pdev;
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/* structs defined in igc_hw.h */
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struct igc_hw hw;
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struct igc_q_vector *q_vector[MAX_Q_VECTORS];
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struct igc_mac_addr *mac_table;
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};
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#endif /* _IGC_H_ */
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@ -4,10 +4,22 @@
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#ifndef _IGC_DEFINES_H_
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#define _IGC_DEFINES_H_
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#define IGC_CTRL_EXT_DRV_LOAD 0x10000000 /* Drv loaded bit for FW */
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/* PCI Bus Info */
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#define PCIE_DEVICE_CONTROL2 0x28
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#define PCIE_DEVICE_CONTROL2_16ms 0x0005
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/* Receive Address
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* Number of high/low register pairs in the RAR. The RAR (Receive Address
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* Registers) holds the directed and multicast addresses that we monitor.
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* Technically, we have 16 spots. However, we reserve one of these spots
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* (RAR[15]) for our directed address used by controllers with
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* manageability enabled, allowing us room for 15 multicast addresses.
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*/
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#define IGC_RAH_AV 0x80000000 /* Receive descriptor valid */
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#define IGC_RAH_POOL_1 0x00040000
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/* Error Codes */
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#define IGC_SUCCESS 0
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#define IGC_ERR_NVM 1
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@ -17,6 +29,9 @@
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#define IGC_ERR_MAC_INIT 5
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#define IGC_ERR_RESET 9
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/* PBA constants */
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#define IGC_PBA_34K 0x0022
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/* Device Status */
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#define IGC_STATUS_FD 0x00000001 /* Full duplex.0=half,1=full */
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#define IGC_STATUS_LU 0x00000002 /* Link up.0=no,1=link */
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@ -59,6 +59,7 @@ struct igc_mac_info {
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bool autoneg;
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bool autoneg_failed;
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bool get_link_status;
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};
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struct igc_bus_info {
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@ -3,6 +3,8 @@
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/if_vlan.h>
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#include <linux/aer.h>
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#include "igc.h"
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#include "igc_hw.h"
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@ -10,10 +12,14 @@
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#define DRV_VERSION "0.0.1-k"
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#define DRV_SUMMARY "Intel(R) 2.5G Ethernet Linux Driver"
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static int debug = -1;
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MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
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MODULE_DESCRIPTION(DRV_SUMMARY);
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MODULE_LICENSE("GPL v2");
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MODULE_VERSION(DRV_VERSION);
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
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char igc_driver_name[] = "igc";
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char igc_driver_version[] = DRV_VERSION;
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@ -32,6 +38,364 @@ MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
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/* forward declaration */
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static int igc_sw_init(struct igc_adapter *);
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static void igc_configure(struct igc_adapter *adapter);
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static void igc_power_down_link(struct igc_adapter *adapter);
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static void igc_set_default_mac_filter(struct igc_adapter *adapter);
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static void igc_reset(struct igc_adapter *adapter)
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{
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if (!netif_running(adapter->netdev))
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igc_power_down_link(adapter);
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}
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/**
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* igc_power_up_link - Power up the phy/serdes link
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* @adapter: address of board private structure
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*/
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static void igc_power_up_link(struct igc_adapter *adapter)
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{
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}
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/**
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* igc_power_down_link - Power down the phy/serdes link
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* @adapter: address of board private structure
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*/
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static void igc_power_down_link(struct igc_adapter *adapter)
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{
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}
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/**
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* igc_release_hw_control - release control of the h/w to f/w
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* @adapter: address of board private structure
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*
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* igc_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
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* For ASF and Pass Through versions of f/w this means that the
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* driver is no longer loaded.
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*/
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static void igc_release_hw_control(struct igc_adapter *adapter)
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{
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struct igc_hw *hw = &adapter->hw;
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u32 ctrl_ext;
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/* Let firmware take over control of h/w */
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ctrl_ext = rd32(IGC_CTRL_EXT);
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wr32(IGC_CTRL_EXT,
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ctrl_ext & ~IGC_CTRL_EXT_DRV_LOAD);
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}
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/**
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* igc_get_hw_control - get control of the h/w from f/w
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* @adapter: address of board private structure
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*
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* igc_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
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* For ASF and Pass Through versions of f/w this means that
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* the driver is loaded.
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*/
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static void igc_get_hw_control(struct igc_adapter *adapter)
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{
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struct igc_hw *hw = &adapter->hw;
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u32 ctrl_ext;
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/* Let firmware know the driver has taken over */
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ctrl_ext = rd32(IGC_CTRL_EXT);
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wr32(IGC_CTRL_EXT,
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ctrl_ext | IGC_CTRL_EXT_DRV_LOAD);
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}
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/**
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* igc_set_mac - Change the Ethernet Address of the NIC
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* @netdev: network interface device structure
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* @p: pointer to an address structure
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*
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* Returns 0 on success, negative on failure
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*/
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static int igc_set_mac(struct net_device *netdev, void *p)
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{
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struct igc_adapter *adapter = netdev_priv(netdev);
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struct igc_hw *hw = &adapter->hw;
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struct sockaddr *addr = p;
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
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memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
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/* set the correct pool for the new PF MAC address in entry 0 */
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igc_set_default_mac_filter(adapter);
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return 0;
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}
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static netdev_tx_t igc_xmit_frame(struct sk_buff *skb,
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struct net_device *netdev)
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{
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dev_kfree_skb_any(skb);
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return NETDEV_TX_OK;
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}
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/**
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* igc_ioctl - I/O control method
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* @netdev: network interface device structure
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* @ifreq: frequency
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* @cmd: command
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*/
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static int igc_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
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{
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switch (cmd) {
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default:
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return -EOPNOTSUPP;
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}
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}
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/**
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* igc_up - Open the interface and prepare it to handle traffic
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* @adapter: board private structure
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*/
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static void igc_up(struct igc_adapter *adapter)
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{
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int i = 0;
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/* hardware has been reset, we need to reload some things */
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igc_configure(adapter);
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clear_bit(__IGC_DOWN, &adapter->state);
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for (i = 0; i < adapter->num_q_vectors; i++)
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napi_enable(&adapter->q_vector[i]->napi);
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}
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/**
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* igc_update_stats - Update the board statistics counters
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* @adapter: board private structure
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*/
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static void igc_update_stats(struct igc_adapter *adapter)
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{
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}
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/**
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* igc_down - Close the interface
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* @adapter: board private structure
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*/
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static void igc_down(struct igc_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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int i = 0;
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set_bit(__IGC_DOWN, &adapter->state);
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/* set trans_start so we don't get spurious watchdogs during reset */
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netif_trans_update(netdev);
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netif_carrier_off(netdev);
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netif_tx_stop_all_queues(netdev);
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for (i = 0; i < adapter->num_q_vectors; i++)
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napi_disable(&adapter->q_vector[i]->napi);
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adapter->link_speed = 0;
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adapter->link_duplex = 0;
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}
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/**
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* igc_change_mtu - Change the Maximum Transfer Unit
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* @netdev: network interface device structure
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* @new_mtu: new value for maximum frame size
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*
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* Returns 0 on success, negative on failure
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*/
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static int igc_change_mtu(struct net_device *netdev, int new_mtu)
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{
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int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
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struct igc_adapter *adapter = netdev_priv(netdev);
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struct pci_dev *pdev = adapter->pdev;
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/* adjust max frame to be at least the size of a standard frame */
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if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
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max_frame = ETH_FRAME_LEN + ETH_FCS_LEN;
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while (test_and_set_bit(__IGC_RESETTING, &adapter->state))
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usleep_range(1000, 2000);
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/* igc_down has a dependency on max_frame_size */
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adapter->max_frame_size = max_frame;
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if (netif_running(netdev))
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igc_down(adapter);
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dev_info(&pdev->dev, "changing MTU from %d to %d\n",
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netdev->mtu, new_mtu);
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netdev->mtu = new_mtu;
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if (netif_running(netdev))
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igc_up(adapter);
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else
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igc_reset(adapter);
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clear_bit(__IGC_RESETTING, &adapter->state);
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return 0;
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}
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/**
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* igc_get_stats - Get System Network Statistics
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* @netdev: network interface device structure
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*
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* Returns the address of the device statistics structure.
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* The statistics are updated here and also from the timer callback.
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*/
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static struct net_device_stats *igc_get_stats(struct net_device *netdev)
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{
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struct igc_adapter *adapter = netdev_priv(netdev);
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if (!test_bit(__IGC_RESETTING, &adapter->state))
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igc_update_stats(adapter);
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/* only return the current stats */
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return &netdev->stats;
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}
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/**
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* igc_configure - configure the hardware for RX and TX
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* @adapter: private board structure
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*/
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static void igc_configure(struct igc_adapter *adapter)
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{
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igc_get_hw_control(adapter);
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}
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/**
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* igc_rar_set_index - Sync RAL[index] and RAH[index] registers with MAC table
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* @adapter: Pointer to adapter structure
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* @index: Index of the RAR entry which need to be synced with MAC table
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*/
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static void igc_rar_set_index(struct igc_adapter *adapter, u32 index)
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{
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u8 *addr = adapter->mac_table[index].addr;
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struct igc_hw *hw = &adapter->hw;
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u32 rar_low, rar_high;
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/* HW expects these to be in network order when they are plugged
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* into the registers which are little endian. In order to guarantee
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* that ordering we need to do an leXX_to_cpup here in order to be
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* ready for the byteswap that occurs with writel
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*/
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rar_low = le32_to_cpup((__le32 *)(addr));
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rar_high = le16_to_cpup((__le16 *)(addr + 4));
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/* Indicate to hardware the Address is Valid. */
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if (adapter->mac_table[index].state & IGC_MAC_STATE_IN_USE) {
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if (is_valid_ether_addr(addr))
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rar_high |= IGC_RAH_AV;
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rar_high |= IGC_RAH_POOL_1 <<
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adapter->mac_table[index].queue;
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}
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wr32(IGC_RAL(index), rar_low);
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wrfl();
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wr32(IGC_RAH(index), rar_high);
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wrfl();
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}
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/* Set default MAC address for the PF in the first RAR entry */
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static void igc_set_default_mac_filter(struct igc_adapter *adapter)
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{
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struct igc_mac_addr *mac_table = &adapter->mac_table[0];
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ether_addr_copy(mac_table->addr, adapter->hw.mac.addr);
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mac_table->state = IGC_MAC_STATE_DEFAULT | IGC_MAC_STATE_IN_USE;
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igc_rar_set_index(adapter, 0);
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}
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/**
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* igc_open - Called when a network interface is made active
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* @netdev: network interface device structure
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*
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* Returns 0 on success, negative value on failure
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*
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* The open entry point is called when a network interface is made
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* active by the system (IFF_UP). At this point all resources needed
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* for transmit and receive operations are allocated, the interrupt
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* handler is registered with the OS, the watchdog timer is started,
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* and the stack is notified that the interface is ready.
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*/
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static int __igc_open(struct net_device *netdev, bool resuming)
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{
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struct igc_adapter *adapter = netdev_priv(netdev);
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struct igc_hw *hw = &adapter->hw;
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int i = 0;
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/* disallow open during test */
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if (test_bit(__IGC_TESTING, &adapter->state)) {
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WARN_ON(resuming);
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return -EBUSY;
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}
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netif_carrier_off(netdev);
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igc_power_up_link(adapter);
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igc_configure(adapter);
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clear_bit(__IGC_DOWN, &adapter->state);
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for (i = 0; i < adapter->num_q_vectors; i++)
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napi_enable(&adapter->q_vector[i]->napi);
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/* start the watchdog. */
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hw->mac.get_link_status = 1;
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return IGC_SUCCESS;
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}
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static int igc_open(struct net_device *netdev)
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{
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return __igc_open(netdev, false);
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}
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/**
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* igc_close - Disables a network interface
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* @netdev: network interface device structure
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*
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* Returns 0, this is not allowed to fail
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*
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* The close entry point is called when an interface is de-activated
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* by the OS. The hardware is still under the driver's control, but
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* needs to be disabled. A global MAC reset is issued to stop the
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* hardware, and all transmit and receive resources are freed.
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*/
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static int __igc_close(struct net_device *netdev, bool suspending)
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{
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struct igc_adapter *adapter = netdev_priv(netdev);
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WARN_ON(test_bit(__IGC_RESETTING, &adapter->state));
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igc_down(adapter);
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igc_release_hw_control(adapter);
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return 0;
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}
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static int igc_close(struct net_device *netdev)
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{
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if (netif_device_present(netdev) || netdev->dismantle)
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return __igc_close(netdev, false);
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return 0;
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}
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static const struct net_device_ops igc_netdev_ops = {
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.ndo_open = igc_open,
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.ndo_stop = igc_close,
|
||||
.ndo_start_xmit = igc_xmit_frame,
|
||||
.ndo_set_mac_address = igc_set_mac,
|
||||
.ndo_change_mtu = igc_change_mtu,
|
||||
.ndo_get_stats = igc_get_stats,
|
||||
.ndo_do_ioctl = igc_ioctl,
|
||||
};
|
||||
|
||||
/* PCIe configuration access */
|
||||
void igc_read_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value)
|
||||
@ -78,6 +442,7 @@ s32 igc_write_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value)
|
||||
|
||||
u32 igc_rd32(struct igc_hw *hw, u32 reg)
|
||||
{
|
||||
struct igc_adapter *igc = container_of(hw, struct igc_adapter, hw);
|
||||
u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
|
||||
u32 value = 0;
|
||||
|
||||
@ -87,8 +452,13 @@ u32 igc_rd32(struct igc_hw *hw, u32 reg)
|
||||
value = readl(&hw_addr[reg]);
|
||||
|
||||
/* reads should not return all F's */
|
||||
if (!(~value) && (!reg || !(~readl(hw_addr))))
|
||||
if (!(~value) && (!reg || !(~readl(hw_addr)))) {
|
||||
struct net_device *netdev = igc->netdev;
|
||||
|
||||
hw->hw_addr = NULL;
|
||||
netif_device_detach(netdev);
|
||||
netdev_err(netdev, "PCIe link lost, device now detached\n");
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
@ -108,6 +478,8 @@ static int igc_probe(struct pci_dev *pdev,
|
||||
const struct pci_device_id *ent)
|
||||
{
|
||||
struct igc_adapter *adapter;
|
||||
struct net_device *netdev;
|
||||
struct igc_hw *hw;
|
||||
int err, pci_using_dac;
|
||||
|
||||
err = pci_enable_device_mem(pdev);
|
||||
@ -140,17 +512,94 @@ static int igc_probe(struct pci_dev *pdev,
|
||||
if (err)
|
||||
goto err_pci_reg;
|
||||
|
||||
pci_enable_pcie_error_reporting(pdev);
|
||||
|
||||
pci_set_master(pdev);
|
||||
|
||||
err = -ENOMEM;
|
||||
netdev = alloc_etherdev_mq(sizeof(struct igc_adapter),
|
||||
IGC_MAX_TX_QUEUES);
|
||||
|
||||
if (!netdev)
|
||||
goto err_alloc_etherdev;
|
||||
|
||||
SET_NETDEV_DEV(netdev, &pdev->dev);
|
||||
|
||||
pci_set_drvdata(pdev, netdev);
|
||||
adapter = netdev_priv(netdev);
|
||||
adapter->netdev = netdev;
|
||||
adapter->pdev = pdev;
|
||||
hw = &adapter->hw;
|
||||
hw->back = adapter;
|
||||
adapter->port_num = hw->bus.func;
|
||||
adapter->msg_enable = GENMASK(debug - 1, 0);
|
||||
|
||||
err = pci_save_state(pdev);
|
||||
if (err)
|
||||
goto err_ioremap;
|
||||
|
||||
err = -EIO;
|
||||
adapter->io_addr = ioremap(pci_resource_start(pdev, 0),
|
||||
pci_resource_len(pdev, 0));
|
||||
if (!adapter->io_addr)
|
||||
goto err_ioremap;
|
||||
|
||||
/* hw->hw_addr can be zeroed, so use adapter->io_addr for unmap */
|
||||
hw->hw_addr = adapter->io_addr;
|
||||
|
||||
netdev->netdev_ops = &igc_netdev_ops;
|
||||
|
||||
netdev->watchdog_timeo = 5 * HZ;
|
||||
|
||||
netdev->mem_start = pci_resource_start(pdev, 0);
|
||||
netdev->mem_end = pci_resource_end(pdev, 0);
|
||||
|
||||
/* PCI config space info */
|
||||
hw->vendor_id = pdev->vendor;
|
||||
hw->device_id = pdev->device;
|
||||
hw->revision_id = pdev->revision;
|
||||
hw->subsystem_vendor_id = pdev->subsystem_vendor;
|
||||
hw->subsystem_device_id = pdev->subsystem_device;
|
||||
|
||||
/* setup the private structure */
|
||||
err = igc_sw_init(adapter);
|
||||
if (err)
|
||||
goto err_sw_init;
|
||||
|
||||
/* MTU range: 68 - 9216 */
|
||||
netdev->min_mtu = ETH_MIN_MTU;
|
||||
netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
|
||||
|
||||
/* reset the hardware with the new settings */
|
||||
igc_reset(adapter);
|
||||
|
||||
/* let the f/w know that the h/w is now under the control of the
|
||||
* driver.
|
||||
*/
|
||||
igc_get_hw_control(adapter);
|
||||
|
||||
strncpy(netdev->name, "eth%d", IFNAMSIZ);
|
||||
err = register_netdev(netdev);
|
||||
if (err)
|
||||
goto err_register;
|
||||
|
||||
/* carrier off reporting is important to ethtool even BEFORE open */
|
||||
netif_carrier_off(netdev);
|
||||
|
||||
/* print pcie link status and MAC address */
|
||||
pcie_print_link_status(pdev);
|
||||
netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr);
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
igc_release_hw_control(adapter);
|
||||
err_sw_init:
|
||||
err_ioremap:
|
||||
free_netdev(netdev);
|
||||
err_alloc_etherdev:
|
||||
pci_release_selected_regions(pdev,
|
||||
pci_select_bars(pdev, IORESOURCE_MEM));
|
||||
err_pci_reg:
|
||||
err_dma:
|
||||
pci_disable_device(pdev);
|
||||
@ -168,9 +617,22 @@ err_dma:
|
||||
*/
|
||||
static void igc_remove(struct pci_dev *pdev)
|
||||
{
|
||||
struct net_device *netdev = pci_get_drvdata(pdev);
|
||||
struct igc_adapter *adapter = netdev_priv(netdev);
|
||||
|
||||
set_bit(__IGC_DOWN, &adapter->state);
|
||||
flush_scheduled_work();
|
||||
|
||||
/* Release control of h/w to f/w. If f/w is AMT enabled, this
|
||||
* would have already happened in close and is redundant.
|
||||
*/
|
||||
igc_release_hw_control(adapter);
|
||||
unregister_netdev(netdev);
|
||||
|
||||
pci_release_selected_regions(pdev,
|
||||
pci_select_bars(pdev, IORESOURCE_MEM));
|
||||
|
||||
free_netdev(netdev);
|
||||
pci_disable_device(pdev);
|
||||
}
|
||||
|
||||
@ -191,6 +653,7 @@ static struct pci_driver igc_driver = {
|
||||
*/
|
||||
static int igc_sw_init(struct igc_adapter *adapter)
|
||||
{
|
||||
struct net_device *netdev = adapter->netdev;
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
|
||||
@ -205,6 +668,12 @@ static int igc_sw_init(struct igc_adapter *adapter)
|
||||
|
||||
pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
|
||||
|
||||
/* adjust max frame to be at least the size of a standard frame */
|
||||
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN +
|
||||
VLAN_HLEN;
|
||||
|
||||
set_bit(__IGC_DOWN, &adapter->state);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user