Commit c9a11c23 authored by Sasha Neftin's avatar Sasha Neftin Committed by Jeff Kirsher

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: default avatarSasha Neftin <sasha.neftin@intel.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 146740f9
......@@ -28,15 +28,63 @@
extern char igc_driver_name[];
extern char igc_driver_version[];
/* Transmit and receive queues */
#define IGC_MAX_RX_QUEUES 4
#define IGC_MAX_TX_QUEUES 4
#define MAX_Q_VECTORS 8
#define MAX_STD_JUMBO_FRAME_SIZE 9216
enum igc_state_t {
__IGC_TESTING,
__IGC_RESETTING,
__IGC_DOWN,
__IGC_PTP_TX_IN_PROGRESS,
};
struct igc_q_vector {
struct igc_adapter *adapter; /* backlink */
struct napi_struct napi;
};
struct igc_mac_addr {
u8 addr[ETH_ALEN];
u8 queue;
u8 state; /* bitmask */
};
#define IGC_MAC_STATE_DEFAULT 0x1
#define IGC_MAC_STATE_MODIFIED 0x2
#define IGC_MAC_STATE_IN_USE 0x4
/* Board specific private data structure */
struct igc_adapter {
struct net_device *netdev;
unsigned long state;
unsigned int flags;
unsigned int num_q_vectors;
u16 link_speed;
u16 link_duplex;
u8 port_num;
u8 __iomem *io_addr;
struct work_struct watchdog_task;
int msg_enable;
u32 max_frame_size;
/* OS defined structs */
struct pci_dev *pdev;
/* structs defined in igc_hw.h */
struct igc_hw hw;
struct igc_q_vector *q_vector[MAX_Q_VECTORS];
struct igc_mac_addr *mac_table;
};
#endif /* _IGC_H_ */
......@@ -4,10 +4,22 @@
#ifndef _IGC_DEFINES_H_
#define _IGC_DEFINES_H_
#define IGC_CTRL_EXT_DRV_LOAD 0x10000000 /* Drv loaded bit for FW */
/* PCI Bus Info */
#define PCIE_DEVICE_CONTROL2 0x28
#define PCIE_DEVICE_CONTROL2_16ms 0x0005
/* Receive Address
* Number of high/low register pairs in the RAR. The RAR (Receive Address
* Registers) holds the directed and multicast addresses that we monitor.
* Technically, we have 16 spots. However, we reserve one of these spots
* (RAR[15]) for our directed address used by controllers with
* manageability enabled, allowing us room for 15 multicast addresses.
*/
#define IGC_RAH_AV 0x80000000 /* Receive descriptor valid */
#define IGC_RAH_POOL_1 0x00040000
/* Error Codes */
#define IGC_SUCCESS 0
#define IGC_ERR_NVM 1
......@@ -17,6 +29,9 @@
#define IGC_ERR_MAC_INIT 5
#define IGC_ERR_RESET 9
/* PBA constants */
#define IGC_PBA_34K 0x0022
/* Device Status */
#define IGC_STATUS_FD 0x00000001 /* Full duplex.0=half,1=full */
#define IGC_STATUS_LU 0x00000002 /* Link up.0=no,1=link */
......
......@@ -59,6 +59,7 @@ struct igc_mac_info {
bool autoneg;
bool autoneg_failed;
bool get_link_status;
};
struct igc_bus_info {
......
......@@ -3,6 +3,8 @@
#include <linux/module.h>
#include <linux/types.h>
#include <linux/if_vlan.h>
#include <linux/aer.h>
#include "igc.h"
#include "igc_hw.h"
......@@ -10,10 +12,14 @@
#define DRV_VERSION "0.0.1-k"
#define DRV_SUMMARY "Intel(R) 2.5G Ethernet Linux Driver"
static int debug = -1;
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION(DRV_SUMMARY);
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
char igc_driver_name[] = "igc";
char igc_driver_version[] = DRV_VERSION;
......@@ -32,6 +38,364 @@ MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
/* forward declaration */
static int igc_sw_init(struct igc_adapter *);
static void igc_configure(struct igc_adapter *adapter);
static void igc_power_down_link(struct igc_adapter *adapter);
static void igc_set_default_mac_filter(struct igc_adapter *adapter);
static void igc_reset(struct igc_adapter *adapter)
{
if (!netif_running(adapter->netdev))
igc_power_down_link(adapter);
}
/**
* igc_power_up_link - Power up the phy/serdes link
* @adapter: address of board private structure
*/
static void igc_power_up_link(struct igc_adapter *adapter)
{
}
/**
* igc_power_down_link - Power down the phy/serdes link
* @adapter: address of board private structure
*/
static void igc_power_down_link(struct igc_adapter *adapter)
{
}
/**
* igc_release_hw_control - release control of the h/w to f/w
* @adapter: address of board private structure
*
* igc_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means that the
* driver is no longer loaded.
*/
static void igc_release_hw_control(struct igc_adapter *adapter)
{
struct igc_hw *hw = &adapter->hw;
u32 ctrl_ext;
/* Let firmware take over control of h/w */
ctrl_ext = rd32(IGC_CTRL_EXT);
wr32(IGC_CTRL_EXT,
ctrl_ext & ~IGC_CTRL_EXT_DRV_LOAD);
}
/**
* igc_get_hw_control - get control of the h/w from f/w
* @adapter: address of board private structure
*
* igc_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
* For ASF and Pass Through versions of f/w this means that
* the driver is loaded.
*/
static void igc_get_hw_control(struct igc_adapter *adapter)
{
struct igc_hw *hw = &adapter->hw;
u32 ctrl_ext;
/* Let firmware know the driver has taken over */
ctrl_ext = rd32(IGC_CTRL_EXT);
wr32(IGC_CTRL_EXT,
ctrl_ext | IGC_CTRL_EXT_DRV_LOAD);
}
/**
* igc_set_mac - Change the Ethernet Address of the NIC
* @netdev: network interface device structure
* @p: pointer to an address structure
*
* Returns 0 on success, negative on failure
*/
static int igc_set_mac(struct net_device *netdev, void *p)
{
struct igc_adapter *adapter = netdev_priv(netdev);
struct igc_hw *hw = &adapter->hw;
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
/* set the correct pool for the new PF MAC address in entry 0 */
igc_set_default_mac_filter(adapter);
return 0;
}
static netdev_tx_t igc_xmit_frame(struct sk_buff *skb,
struct net_device *netdev)
{
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
/**
* igc_ioctl - I/O control method
* @netdev: network interface device structure
* @ifreq: frequency
* @cmd: command
*/
static int igc_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
switch (cmd) {
default:
return -EOPNOTSUPP;
}
}
/**
* igc_up - Open the interface and prepare it to handle traffic
* @adapter: board private structure
*/
static void igc_up(struct igc_adapter *adapter)
{
int i = 0;
/* hardware has been reset, we need to reload some things */
igc_configure(adapter);
clear_bit(__IGC_DOWN, &adapter->state);
for (i = 0; i < adapter->num_q_vectors; i++)
napi_enable(&adapter->q_vector[i]->napi);
}
/**
* igc_update_stats - Update the board statistics counters
* @adapter: board private structure
*/
static void igc_update_stats(struct igc_adapter *adapter)
{
}
/**
* igc_down - Close the interface
* @adapter: board private structure
*/
static void igc_down(struct igc_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
int i = 0;
set_bit(__IGC_DOWN, &adapter->state);
/* set trans_start so we don't get spurious watchdogs during reset */
netif_trans_update(netdev);
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);
for (i = 0; i < adapter->num_q_vectors; i++)
napi_disable(&adapter->q_vector[i]->napi);
adapter->link_speed = 0;
adapter->link_duplex = 0;
}
/**
* igc_change_mtu - Change the Maximum Transfer Unit
* @netdev: network interface device structure
* @new_mtu: new value for maximum frame size
*
* Returns 0 on success, negative on failure
*/
static int igc_change_mtu(struct net_device *netdev, int new_mtu)
{
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
struct igc_adapter *adapter = netdev_priv(netdev);
struct pci_dev *pdev = adapter->pdev;
/* adjust max frame to be at least the size of a standard frame */
if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
max_frame = ETH_FRAME_LEN + ETH_FCS_LEN;
while (test_and_set_bit(__IGC_RESETTING, &adapter->state))
usleep_range(1000, 2000);
/* igc_down has a dependency on max_frame_size */
adapter->max_frame_size = max_frame;
if (netif_running(netdev))
igc_down(adapter);
dev_info(&pdev->dev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
if (netif_running(netdev))
igc_up(adapter);
else
igc_reset(adapter);
clear_bit(__IGC_RESETTING, &adapter->state);
return 0;
}
/**
* igc_get_stats - Get System Network Statistics
* @netdev: network interface device structure
*
* Returns the address of the device statistics structure.
* The statistics are updated here and also from the timer callback.
*/
static struct net_device_stats *igc_get_stats(struct net_device *netdev)
{
struct igc_adapter *adapter = netdev_priv(netdev);
if (!test_bit(__IGC_RESETTING, &adapter->state))
igc_update_stats(adapter);
/* only return the current stats */
return &netdev->stats;
}
/**
* igc_configure - configure the hardware for RX and TX
* @adapter: private board structure
*/
static void igc_configure(struct igc_adapter *adapter)
{
igc_get_hw_control(adapter);
}
/**
* igc_rar_set_index - Sync RAL[index] and RAH[index] registers with MAC table
* @adapter: Pointer to adapter structure
* @index: Index of the RAR entry which need to be synced with MAC table
*/
static void igc_rar_set_index(struct igc_adapter *adapter, u32 index)
{
u8 *addr = adapter->mac_table[index].addr;
struct igc_hw *hw = &adapter->hw;
u32 rar_low, rar_high;
/* HW expects these to be in network order when they are plugged
* into the registers which are little endian. In order to guarantee
* that ordering we need to do an leXX_to_cpup here in order to be
* ready for the byteswap that occurs with writel
*/
rar_low = le32_to_cpup((__le32 *)(addr));
rar_high = le16_to_cpup((__le16 *)(addr + 4));
/* Indicate to hardware the Address is Valid. */
if (adapter->mac_table[index].state & IGC_MAC_STATE_IN_USE) {
if (is_valid_ether_addr(addr))
rar_high |= IGC_RAH_AV;
rar_high |= IGC_RAH_POOL_1 <<
adapter->mac_table[index].queue;
}
wr32(IGC_RAL(index), rar_low);
wrfl();
wr32(IGC_RAH(index), rar_high);
wrfl();
}
/* Set default MAC address for the PF in the first RAR entry */
static void igc_set_default_mac_filter(struct igc_adapter *adapter)
{
struct igc_mac_addr *mac_table = &adapter->mac_table[0];
ether_addr_copy(mac_table->addr, adapter->hw.mac.addr);
mac_table->state = IGC_MAC_STATE_DEFAULT | IGC_MAC_STATE_IN_USE;
igc_rar_set_index(adapter, 0);
}
/**
* igc_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.
*/
static int __igc_open(struct net_device *netdev, bool resuming)
{
struct igc_adapter *adapter = netdev_priv(netdev);
struct igc_hw *hw = &adapter->hw;
int i = 0;
/* disallow open during test */
if (test_bit(__IGC_TESTING, &adapter->state)) {
WARN_ON(resuming);
return -EBUSY;
}
netif_carrier_off(netdev);
igc_power_up_link(adapter);
igc_configure(adapter);
clear_bit(__IGC_DOWN, &adapter->state);
for (i = 0; i < adapter->num_q_vectors; i++)
napi_enable(&adapter->q_vector[i]->napi);
/* start the watchdog. */
hw->mac.get_link_status = 1;
return IGC_SUCCESS;
}
static int igc_open(struct net_device *netdev)
{
return __igc_open(netdev, false);
}
/**
* igc_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 driver's control, but
* needs to be disabled. A global MAC reset is issued to stop the
* hardware, and all transmit and receive resources are freed.
*/
static int __igc_close(struct net_device *netdev, bool suspending)
{
struct igc_adapter *adapter = netdev_priv(netdev);
WARN_ON(test_bit(__IGC_RESETTING, &adapter->state));
igc_down(adapter);
igc_release_hw_control(adapter);
return 0;
}
static int igc_close(struct net_device *netdev)
{
if (netif_device_present(netdev) || netdev->dismantle)
return __igc_close(netdev, false);
return 0;
}
static const struct net_device_ops igc_netdev_ops = {
.ndo_open = igc_open,
.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 @@ static int igc_probe(struct pci_dev *pdev,
*/
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;
}
......
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