2018-10-11 07:17:08 +00:00
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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, <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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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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2018-10-11 07:17:10 +00:00
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/* forward declaration */
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static int igc_sw_init(struct igc_adapter *);
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/* PCIe configuration access */
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void igc_read_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value)
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{
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struct igc_adapter *adapter = hw->back;
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pci_read_config_word(adapter->pdev, reg, value);
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}
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void igc_write_pci_cfg(struct igc_hw *hw, u32 reg, u16 *value)
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{
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struct igc_adapter *adapter = hw->back;
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pci_write_config_word(adapter->pdev, reg, *value);
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}
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s32 igc_read_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value)
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{
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struct igc_adapter *adapter = hw->back;
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u16 cap_offset;
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cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
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if (!cap_offset)
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return -IGC_ERR_CONFIG;
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pci_read_config_word(adapter->pdev, cap_offset + reg, value);
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return IGC_SUCCESS;
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}
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s32 igc_write_pcie_cap_reg(struct igc_hw *hw, u32 reg, u16 *value)
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{
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struct igc_adapter *adapter = hw->back;
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u16 cap_offset;
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cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
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if (!cap_offset)
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return -IGC_ERR_CONFIG;
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pci_write_config_word(adapter->pdev, cap_offset + reg, *value);
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return IGC_SUCCESS;
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}
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u32 igc_rd32(struct igc_hw *hw, u32 reg)
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{
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u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
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u32 value = 0;
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if (IGC_REMOVED(hw_addr))
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return ~value;
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value = readl(&hw_addr[reg]);
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/* reads should not return all F's */
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if (!(~value) && (!reg || !(~readl(hw_addr))))
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hw->hw_addr = NULL;
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return value;
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}
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2018-10-11 07:17:08 +00:00
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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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2018-10-11 07:17:10 +00:00
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struct igc_adapter *adapter;
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2018-10-11 07:17:08 +00:00
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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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2018-10-11 07:17:10 +00:00
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/* setup the private structure */
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err = igc_sw_init(adapter);
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if (err)
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goto err_sw_init;
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2018-10-11 07:17:08 +00:00
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return 0;
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2018-10-11 07:17:10 +00:00
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err_sw_init:
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2018-10-11 07:17:08 +00:00
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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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2018-10-11 07:17:10 +00:00
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/**
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* igc_sw_init - Initialize general software structures (struct igc_adapter)
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* @adapter: board private structure to initialize
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*
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* igc_sw_init initializes the Adapter private data structure.
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* Fields are initialized based on PCI device information and
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* OS network device settings (MTU size).
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*/
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static int igc_sw_init(struct igc_adapter *adapter)
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{
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struct pci_dev *pdev = adapter->pdev;
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struct igc_hw *hw = &adapter->hw;
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/* PCI config space info */
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hw->vendor_id = pdev->vendor;
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hw->device_id = pdev->device;
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hw->subsystem_vendor_id = pdev->subsystem_vendor;
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hw->subsystem_device_id = pdev->subsystem_device;
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pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
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pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
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return 0;
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}
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2018-10-11 07:17:08 +00:00
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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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