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 <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index b542aba..76f926d 100644 (file)
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -287,4 +287,20 @@ config FM10K
          To compile this driver as a module, choose M here. The module
          will be called fm10k.  MSI-X interrupt support is required
 
+config IGC
+       tristate "Intel(R) Ethernet Controller I225-LM/I225-V support"
+       default n
+       depends on PCI
+       ---help---
+         This driver supports Intel(R) Ethernet Controller I225-LM/I225-V
+         family of adapters.
+
+         For more information on how to identify your adapter, go
+         to the Adapter & Driver ID Guide that can be located at:
+
+         <http://support.intel.com>
+
+         To compile this driver as a module, choose M here. The module
+         will be called igc.
+
 endif # NET_VENDOR_INTEL

diff --git a/drivers/net/ethernet/intel/Makefile b/drivers/net/ethernet/intel/Makefile
index b91153d..3075290 100644 (file)
--- a/drivers/net/ethernet/intel/Makefile
+++ b/drivers/net/ethernet/intel/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_E100) += e100.o
 obj-$(CONFIG_E1000) += e1000/
 obj-$(CONFIG_E1000E) += e1000e/
 obj-$(CONFIG_IGB) += igb/
+obj-$(CONFIG_IGC) += igc/
 obj-$(CONFIG_IGBVF) += igbvf/
 obj-$(CONFIG_IXGBE) += ixgbe/
 obj-$(CONFIG_IXGBEVF) += ixgbevf/

diff --git a/drivers/net/ethernet/intel/igc/Makefile b/drivers/net/ethernet/intel/igc/Makefile
new file mode 100644 (file)
index 0000000..3d13b01
--- /dev/null
+++ b/drivers/net/ethernet/intel/igc/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c)  2018 Intel Corporation
+
+#
+# Intel(R) I225-LM/I225-V 2.5G Ethernet Controller
+#
+
+obj-$(CONFIG_IGC) += igc.o
+
+igc-objs := igc_main.o

diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
new file mode 100644 (file)
index 0000000..afe595c
--- /dev/null
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c)  2018 Intel Corporation */
+
+#ifndef _IGC_H_
+#define _IGC_H_
+
+#include <linux/kobject.h>
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+
+#include <linux/ethtool.h>
+
+#include <linux/sctp.h>
+
+#define IGC_ERR(args...) pr_err("igc: " args)
+
+#define PFX "igc: "
+
+#include <linux/timecounter.h>
+#include <linux/net_tstamp.h>
+#include <linux/ptp_clock_kernel.h>
+
+/* main */
+extern char igc_driver_name[];
+extern char igc_driver_version[];
+
+#endif /* _IGC_H_ */

diff --git a/drivers/net/ethernet/intel/igc/igc_hw.h b/drivers/net/ethernet/intel/igc/igc_hw.h
new file mode 100644 (file)
index 0000000..aa68b45
--- /dev/null
+++ b/drivers/net/ethernet/intel/igc/igc_hw.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c)  2018 Intel Corporation */
+
+#ifndef _IGC_HW_H_
+#define _IGC_HW_H_
+
+#define IGC_DEV_ID_I225_LM                     0x15F2
+#define IGC_DEV_ID_I225_V                      0x15F3
+
+#endif /* _IGC_HW_H_ */

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
new file mode 100644 (file)
index 0000000..753749c
--- /dev/null
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c)  2018 Intel Corporation */
+
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "igc.h"
+#include "igc_hw.h"
+
+#define DRV_VERSION    "0.0.1-k"
+#define DRV_SUMMARY    "Intel(R) 2.5G Ethernet Linux Driver"
+
+MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
+MODULE_DESCRIPTION(DRV_SUMMARY);
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+
+char igc_driver_name[] = "igc";
+char igc_driver_version[] = DRV_VERSION;
+static const char igc_driver_string[] = DRV_SUMMARY;
+static const char igc_copyright[] =
+       "Copyright(c) 2018 Intel Corporation.";
+
+static const struct pci_device_id igc_pci_tbl[] = {
+       { PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_LM) },
+       { PCI_VDEVICE(INTEL, IGC_DEV_ID_I225_V) },
+       /* required last entry */
+       {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
+
+/**
+ * igc_probe - Device Initialization Routine
+ * @pdev: PCI device information struct
+ * @ent: entry in igc_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ *
+ * igc_probe initializes an adapter identified by a pci_dev structure.
+ * The OS initialization, configuring the adapter private structure,
+ * and a hardware reset occur.
+ */
+static int igc_probe(struct pci_dev *pdev,
+                    const struct pci_device_id *ent)
+{
+       int err, pci_using_dac;
+
+       err = pci_enable_device_mem(pdev);
+       if (err)
+               return err;
+
+       pci_using_dac = 0;
+       err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
+       if (!err) {
+               err = dma_set_coherent_mask(&pdev->dev,
+                                           DMA_BIT_MASK(64));
+               if (!err)
+                       pci_using_dac = 1;
+       } else {
+               err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+               if (err) {
+                       err = dma_set_coherent_mask(&pdev->dev,
+                                                   DMA_BIT_MASK(32));
+                       if (err) {
+                               IGC_ERR("Wrong DMA configuration, aborting\n");
+                               goto err_dma;
+                       }
+               }
+       }
+
+       err = pci_request_selected_regions(pdev,
+                                          pci_select_bars(pdev,
+                                                          IORESOURCE_MEM),
+                                          igc_driver_name);
+       if (err)
+               goto err_pci_reg;
+
+       pci_set_master(pdev);
+       err = pci_save_state(pdev);
+       return 0;
+
+err_pci_reg:
+err_dma:
+       pci_disable_device(pdev);
+       return err;
+}
+
+/**
+ * igc_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * igc_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.  This could be caused by a
+ * Hot-Plug event, or because the driver is going to be removed from
+ * memory.
+ */
+static void igc_remove(struct pci_dev *pdev)
+{
+       pci_release_selected_regions(pdev,
+                                    pci_select_bars(pdev, IORESOURCE_MEM));
+
+       pci_disable_device(pdev);
+}
+
+static struct pci_driver igc_driver = {
+       .name     = igc_driver_name,
+       .id_table = igc_pci_tbl,
+       .probe    = igc_probe,
+       .remove   = igc_remove,
+};
+
+/**
+ * igc_init_module - Driver Registration Routine
+ *
+ * igc_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ */
+static int __init igc_init_module(void)
+{
+       int ret;
+
+       pr_info("%s - version %s\n",
+               igc_driver_string, igc_driver_version);
+
+       pr_info("%s\n", igc_copyright);
+
+       ret = pci_register_driver(&igc_driver);
+       return ret;
+}
+
+module_init(igc_init_module);
+
+/**
+ * igc_exit_module - Driver Exit Cleanup Routine
+ *
+ * igc_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit igc_exit_module(void)
+{
+       pci_unregister_driver(&igc_driver);
+}
+
+module_exit(igc_exit_module);
+/* igc_main.c */