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aneftinJeff Kirsher
aneftin
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Jeff Kirsher
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igc: Add skeletal frame for Intel(R) 2.5G Ethernet Controller support
This patch adds the beginning framework onto which I am going to add the igc driver which supports the Intel(R) I225-LM/I225-V 2.5G Ethernet Controller. Signed-off-by: Sasha Neftin <[email protected]> Tested-by: Aaron Brown <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
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‎drivers/net/ethernet/intel/Kconfig

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@@ -287,4 +287,20 @@ config FM10K
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To compile this driver as a module, choose M here. The module
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will be called fm10k. MSI-X interrupt support is required
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config IGC
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tristate "Intel(R) Ethernet Controller I225-LM/I225-V support"
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default n
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depends on PCI
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---help---
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This driver supports Intel(R) Ethernet Controller I225-LM/I225-V
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family of adapters.
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For more information on how to identify your adapter, go
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to the Adapter & Driver ID Guide that can be located at:
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<http://support.intel.com>
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To compile this driver as a module, choose M here. The module
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will be called igc.
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endif # NET_VENDOR_INTEL

‎drivers/net/ethernet/intel/Makefile

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@@ -7,6 +7,7 @@ obj-$(CONFIG_E100) += e100.o
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obj-$(CONFIG_E1000) += e1000/
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obj-$(CONFIG_E1000E) += e1000e/
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obj-$(CONFIG_IGB) += igb/
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obj-$(CONFIG_IGC) += igc/
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obj-$(CONFIG_IGBVF) += igbvf/
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obj-$(CONFIG_IXGBE) += ixgbe/
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obj-$(CONFIG_IXGBEVF) += ixgbevf/

‎drivers/net/ethernet/intel/igc/Makefile

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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2018 Intel Corporation
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#
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# Intel(R) I225-LM/I225-V 2.5G Ethernet Controller
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#
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obj-$(CONFIG_IGC) += igc.o
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igc-objs := igc_main.o

‎drivers/net/ethernet/intel/igc/igc.h

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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018 Intel Corporation */
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#ifndef _IGC_H_
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#define _IGC_H_
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#include <linux/kobject.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/vmalloc.h>
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#include <linux/ethtool.h>
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#include <linux/sctp.h>
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#define IGC_ERR(args...) pr_err("igc: " args)
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#define PFX "igc: "
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#include <linux/timecounter.h>
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#include <linux/net_tstamp.h>
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#include <linux/ptp_clock_kernel.h>
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/* main */
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extern char igc_driver_name[];
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extern char igc_driver_version[];
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#endif /* _IGC_H_ */

‎drivers/net/ethernet/intel/igc/igc_hw.h

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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018 Intel Corporation */
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#ifndef _IGC_HW_H_
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#define _IGC_HW_H_
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#define IGC_DEV_ID_I225_LM 0x15F2
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#define IGC_DEV_ID_I225_V 0x15F3
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#endif /* _IGC_HW_H_ */

‎drivers/net/ethernet/intel/igc/igc_main.c

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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018 Intel Corporation */
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#include <linux/module.h>
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#include <linux/types.h>
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#include "igc.h"
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#include "igc_hw.h"
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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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MODULE_AUTHOR("Intel Corporation, <[email protected]>");
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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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char igc_driver_name[] = "igc";
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char igc_driver_version[] = DRV_VERSION;
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static const char igc_driver_string[] = DRV_SUMMARY;
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static const char igc_copyright[] =
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"Copyright(c) 2018 Intel Corporation.";
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static const struct pci_device_id igc_pci_tbl[] = {
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{ PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_LM) },
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{ PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_V) },
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/* required last entry */
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{0, }
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};
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MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
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/**
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* igc_probe - Device Initialization Routine
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* @pdev: PCI device information struct
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* @ent: entry in igc_pci_tbl
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*
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* Returns 0 on success, negative on failure
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*
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* igc_probe initializes an adapter identified by a pci_dev structure.
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* The OS initialization, configuring the adapter private structure,
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* and a hardware reset occur.
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*/
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static int igc_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int err, pci_using_dac;
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err = pci_enable_device_mem(pdev);
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if (err)
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return err;
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pci_using_dac = 0;
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err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
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if (!err) {
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err = dma_set_coherent_mask(&pdev->dev,
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DMA_BIT_MASK(64));
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if (!err)
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pci_using_dac = 1;
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} else {
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err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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if (err) {
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err = dma_set_coherent_mask(&pdev->dev,
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DMA_BIT_MASK(32));
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if (err) {
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IGC_ERR("Wrong DMA configuration, aborting\n");
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goto err_dma;
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}
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}
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}
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err = pci_request_selected_regions(pdev,
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pci_select_bars(pdev,
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IORESOURCE_MEM),
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igc_driver_name);
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if (err)
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goto err_pci_reg;
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pci_set_master(pdev);
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err = pci_save_state(pdev);
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return 0;
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err_pci_reg:
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err_dma:
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pci_disable_device(pdev);
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return err;
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}
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/**
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* igc_remove - Device Removal Routine
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* @pdev: PCI device information struct
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*
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* igc_remove is called by the PCI subsystem to alert the driver
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* that it should release a PCI device. This could be caused by a
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* Hot-Plug event, or because the driver is going to be removed from
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* memory.
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*/
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static void igc_remove(struct pci_dev *pdev)
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{
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pci_release_selected_regions(pdev,
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pci_select_bars(pdev, IORESOURCE_MEM));
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pci_disable_device(pdev);
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}
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static struct pci_driver igc_driver = {
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.name = igc_driver_name,
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.id_table = igc_pci_tbl,
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.probe = igc_probe,
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.remove = igc_remove,
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};
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/**
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* igc_init_module - Driver Registration Routine
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*
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* igc_init_module is the first routine called when the driver is
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* loaded. All it does is register with the PCI subsystem.
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*/
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static int __init igc_init_module(void)
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{
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int ret;
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pr_info("%s - version %s\n",
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igc_driver_string, igc_driver_version);
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pr_info("%s\n", igc_copyright);
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ret = pci_register_driver(&igc_driver);
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return ret;
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}
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module_init(igc_init_module);
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/**
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* igc_exit_module - Driver Exit Cleanup Routine
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*
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* igc_exit_module is called just before the driver is removed
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* from memory.
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*/
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static void __exit igc_exit_module(void)
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{
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pci_unregister_driver(&igc_driver);
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}
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module_exit(igc_exit_module);
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/* igc_main.c */

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