1 files changed, 392 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/idpf/idpf_main.c b/drivers/net/ethernet/intel/idpf/idpf_main.c
new file mode 100644
index 000000000000..de5d722cc21d
--- /dev/null
+++ b/drivers/net/ethernet/intel/idpf/idpf_main.c
@@ -0,0 +1,392 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2023 Intel Corporation */
+
+#include "idpf.h"
+#include "idpf_devids.h"
+#include "idpf_lan_vf_regs.h"
+#include "idpf_virtchnl.h"
+
+#define DRV_SUMMARY	"Intel(R) Infrastructure Data Path Function Linux Driver"
+
+#define IDPF_NETWORK_ETHERNET_PROGIF				0x01
+#define IDPF_CLASS_NETWORK_ETHERNET_PROGIF			\
+	(PCI_CLASS_NETWORK_ETHERNET << 8 | IDPF_NETWORK_ETHERNET_PROGIF)
+#define IDPF_VF_TEST_VAL		0xfeed0000u
+
+MODULE_DESCRIPTION(DRV_SUMMARY);
+MODULE_IMPORT_NS("LIBETH");
+MODULE_IMPORT_NS("LIBETH_XDP");
+MODULE_LICENSE("GPL");
+
+/**
+ * idpf_get_device_type - Helper to find if it is a VF or PF device
+ * @pdev: PCI device information struct
+ *
+ * Return: PF/VF device ID or -%errno on failure.
+ */
+static int idpf_get_device_type(struct pci_dev *pdev)
+{
+	void __iomem *addr;
+	int ret;
+
+	addr = ioremap(pci_resource_start(pdev, 0) + VF_ARQBAL, 4);
+	if (!addr) {
+		pci_err(pdev, "Failed to allocate BAR0 mbx region\n");
+		return -EIO;
+	}
+
+	writel(IDPF_VF_TEST_VAL, addr);
+	if (readl(addr) == IDPF_VF_TEST_VAL)
+		ret = IDPF_DEV_ID_VF;
+	else
+		ret = IDPF_DEV_ID_PF;
+
+	iounmap(addr);
+
+	return ret;
+}
+
+/**
+ * idpf_dev_init - Initialize device specific parameters
+ * @adapter: adapter to initialize
+ * @ent: entry in idpf_pci_tbl
+ *
+ * Return: %0 on success, -%errno on failure.
+ */
+static int idpf_dev_init(struct idpf_adapter *adapter,
+			 const struct pci_device_id *ent)
+{
+	int ret;
+
+	if (ent->class == IDPF_CLASS_NETWORK_ETHERNET_PROGIF) {
+		ret = idpf_get_device_type(adapter->pdev);
+		switch (ret) {
+		case IDPF_DEV_ID_VF:
+			idpf_vf_dev_ops_init(adapter);
+			adapter->crc_enable = true;
+			break;
+		case IDPF_DEV_ID_PF:
+			idpf_dev_ops_init(adapter);
+			break;
+		default:
+			return ret;
+		}
+
+		return 0;
+	}
+
+	switch (ent->device) {
+	case IDPF_DEV_ID_PF:
+		idpf_dev_ops_init(adapter);
+		break;
+	case IDPF_DEV_ID_VF:
+		idpf_vf_dev_ops_init(adapter);
+		adapter->crc_enable = true;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/**
+ * idpf_remove - Device removal routine
+ * @pdev: PCI device information struct
+ */
+static void idpf_remove(struct pci_dev *pdev)
+{
+	struct idpf_adapter *adapter = pci_get_drvdata(pdev);
+	int i;
+
+	set_bit(IDPF_REMOVE_IN_PROG, adapter->flags);
+
+	/* Wait until vc_event_task is done to consider if any hard reset is
+	 * in progress else we may go ahead and release the resources but the
+	 * thread doing the hard reset might continue the init path and
+	 * end up in bad state.
+	 */
+	cancel_delayed_work_sync(&adapter->vc_event_task);
+	if (adapter->num_vfs)
+		idpf_sriov_configure(pdev, 0);
+
+	idpf_vc_core_deinit(adapter);
+
+	/* Be a good citizen and leave the device clean on exit */
+	adapter->dev_ops.reg_ops.trigger_reset(adapter, IDPF_HR_FUNC_RESET);
+	idpf_deinit_dflt_mbx(adapter);
+
+	if (!adapter->netdevs)
+		goto destroy_wqs;
+
+	/* There are some cases where it's possible to still have netdevs
+	 * registered with the stack at this point, e.g. if the driver detected
+	 * a HW reset and rmmod is called before it fully recovers. Unregister
+	 * any stale netdevs here.
+	 */
+	for (i = 0; i < adapter->max_vports; i++) {
+		if (!adapter->netdevs[i])
+			continue;
+		if (adapter->netdevs[i]->reg_state != NETREG_UNINITIALIZED)
+			unregister_netdev(adapter->netdevs[i]);
+		free_netdev(adapter->netdevs[i]);
+		adapter->netdevs[i] = NULL;
+	}
+
+destroy_wqs:
+	destroy_workqueue(adapter->init_wq);
+	destroy_workqueue(adapter->serv_wq);
+	destroy_workqueue(adapter->mbx_wq);
+	destroy_workqueue(adapter->stats_wq);
+	destroy_workqueue(adapter->vc_event_wq);
+
+	for (i = 0; i < adapter->max_vports; i++) {
+		if (!adapter->vport_config[i])
+			continue;
+		kfree(adapter->vport_config[i]->user_config.q_coalesce);
+		kfree(adapter->vport_config[i]);
+		adapter->vport_config[i] = NULL;
+	}
+	kfree(adapter->vport_config);
+	adapter->vport_config = NULL;
+	kfree(adapter->netdevs);
+	adapter->netdevs = NULL;
+	kfree(adapter->vcxn_mngr);
+	adapter->vcxn_mngr = NULL;
+
+	mutex_destroy(&adapter->vport_ctrl_lock);
+	mutex_destroy(&adapter->vector_lock);
+	mutex_destroy(&adapter->queue_lock);
+	mutex_destroy(&adapter->vc_buf_lock);
+
+	pci_set_drvdata(pdev, NULL);
+	kfree(adapter);
+}
+
+/**
+ * idpf_shutdown - PCI callback for shutting down device
+ * @pdev: PCI device information struct
+ */
+static void idpf_shutdown(struct pci_dev *pdev)
+{
+	struct idpf_adapter *adapter = pci_get_drvdata(pdev);
+
+	cancel_delayed_work_sync(&adapter->serv_task);
+	cancel_delayed_work_sync(&adapter->vc_event_task);
+	idpf_vc_core_deinit(adapter);
+	idpf_deinit_dflt_mbx(adapter);
+
+	if (system_state == SYSTEM_POWER_OFF)
+		pci_set_power_state(pdev, PCI_D3hot);
+}
+
+/**
+ * idpf_cfg_hw - Initialize HW struct
+ * @adapter: adapter to setup hw struct for
+ *
+ * Returns 0 on success, negative on failure
+ */
+static int idpf_cfg_hw(struct idpf_adapter *adapter)
+{
+	resource_size_t res_start, mbx_start, rstat_start;
+	struct pci_dev *pdev = adapter->pdev;
+	struct idpf_hw *hw = &adapter->hw;
+	struct device *dev = &pdev->dev;
+	long len;
+
+	res_start = pci_resource_start(pdev, 0);
+
+	/* Map mailbox space for virtchnl communication */
+	mbx_start = res_start + adapter->dev_ops.static_reg_info[0].start;
+	len = resource_size(&adapter->dev_ops.static_reg_info[0]);
+	hw->mbx.vaddr = devm_ioremap(dev, mbx_start, len);
+	if (!hw->mbx.vaddr) {
+		pci_err(pdev, "failed to allocate BAR0 mbx region\n");
+
+		return -ENOMEM;
+	}
+	hw->mbx.addr_start = adapter->dev_ops.static_reg_info[0].start;
+	hw->mbx.addr_len = len;
+
+	/* Map rstat space for resets */
+	rstat_start = res_start + adapter->dev_ops.static_reg_info[1].start;
+	len = resource_size(&adapter->dev_ops.static_reg_info[1]);
+	hw->rstat.vaddr = devm_ioremap(dev, rstat_start, len);
+	if (!hw->rstat.vaddr) {
+		pci_err(pdev, "failed to allocate BAR0 rstat region\n");
+
+		return -ENOMEM;
+	}
+	hw->rstat.addr_start = adapter->dev_ops.static_reg_info[1].start;
+	hw->rstat.addr_len = len;
+
+	hw->back = adapter;
+
+	return 0;
+}
+
+/**
+ * idpf_probe - Device initialization routine
+ * @pdev: PCI device information struct
+ * @ent: entry in idpf_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ */
+static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	struct idpf_adapter *adapter;
+	int err;
+
+	adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
+	if (!adapter)
+		return -ENOMEM;
+
+	adapter->req_tx_splitq = true;
+	adapter->req_rx_splitq = true;
+
+	adapter->pdev = pdev;
+	err = pcim_enable_device(pdev);
+	if (err)
+		goto err_free;
+
+	err = pcim_request_region(pdev, 0, pci_name(pdev));
+	if (err) {
+		pci_err(pdev, "pcim_request_region failed %pe\n", ERR_PTR(err));
+
+		goto err_free;
+	}
+
+	err = pci_enable_ptm(pdev, NULL);
+	if (err)
+		pci_dbg(pdev, "PCIe PTM is not supported by PCIe bus/controller\n");
+
+	/* set up for high or low dma */
+	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	if (err) {
+		pci_err(pdev, "DMA configuration failed: %pe\n", ERR_PTR(err));
+
+		goto err_free;
+	}
+
+	pci_set_master(pdev);
+	pci_set_drvdata(pdev, adapter);
+
+	adapter->init_wq = alloc_workqueue("%s-%s-init",
+					   WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
+					   dev_driver_string(dev),
+					   dev_name(dev));
+	if (!adapter->init_wq) {
+		dev_err(dev, "Failed to allocate init workqueue\n");
+		err = -ENOMEM;
+		goto err_free;
+	}
+
+	adapter->serv_wq = alloc_workqueue("%s-%s-service",
+					   WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
+					   dev_driver_string(dev),
+					   dev_name(dev));
+	if (!adapter->serv_wq) {
+		dev_err(dev, "Failed to allocate service workqueue\n");
+		err = -ENOMEM;
+		goto err_serv_wq_alloc;
+	}
+
+	adapter->mbx_wq = alloc_workqueue("%s-%s-mbx", WQ_UNBOUND | WQ_HIGHPRI,
+					  0, dev_driver_string(dev),
+					  dev_name(dev));
+	if (!adapter->mbx_wq) {
+		dev_err(dev, "Failed to allocate mailbox workqueue\n");
+		err = -ENOMEM;
+		goto err_mbx_wq_alloc;
+	}
+
+	adapter->stats_wq = alloc_workqueue("%s-%s-stats",
+					    WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
+					    dev_driver_string(dev),
+					    dev_name(dev));
+	if (!adapter->stats_wq) {
+		dev_err(dev, "Failed to allocate workqueue\n");
+		err = -ENOMEM;
+		goto err_stats_wq_alloc;
+	}
+
+	adapter->vc_event_wq = alloc_workqueue("%s-%s-vc_event",
+					       WQ_UNBOUND | WQ_MEM_RECLAIM, 0,
+					       dev_driver_string(dev),
+					       dev_name(dev));
+	if (!adapter->vc_event_wq) {
+		dev_err(dev, "Failed to allocate virtchnl event workqueue\n");
+		err = -ENOMEM;
+		goto err_vc_event_wq_alloc;
+	}
+
+	/* setup msglvl */
+	adapter->msg_enable = netif_msg_init(-1, IDPF_AVAIL_NETIF_M);
+
+	err = idpf_dev_init(adapter, ent);
+	if (err) {
+		dev_err(&pdev->dev, "Unexpected dev ID 0x%x in idpf probe\n",
+			ent->device);
+		goto destroy_vc_event_wq;
+	}
+
+	err = idpf_cfg_hw(adapter);
+	if (err) {
+		dev_err(dev, "Failed to configure HW structure for adapter: %d\n",
+			err);
+		goto destroy_vc_event_wq;
+	}
+
+	mutex_init(&adapter->vport_ctrl_lock);
+	mutex_init(&adapter->vector_lock);
+	mutex_init(&adapter->queue_lock);
+	mutex_init(&adapter->vc_buf_lock);
+
+	INIT_DELAYED_WORK(&adapter->init_task, idpf_init_task);
+	INIT_DELAYED_WORK(&adapter->serv_task, idpf_service_task);
+	INIT_DELAYED_WORK(&adapter->mbx_task, idpf_mbx_task);
+	INIT_DELAYED_WORK(&adapter->stats_task, idpf_statistics_task);
+	INIT_DELAYED_WORK(&adapter->vc_event_task, idpf_vc_event_task);
+
+	adapter->dev_ops.reg_ops.reset_reg_init(adapter);
+	set_bit(IDPF_HR_DRV_LOAD, adapter->flags);
+	queue_delayed_work(adapter->vc_event_wq, &adapter->vc_event_task,
+			   msecs_to_jiffies(10 * (pdev->devfn & 0x07)));
+
+	return 0;
+
+destroy_vc_event_wq:
+	destroy_workqueue(adapter->vc_event_wq);
+err_vc_event_wq_alloc:
+	destroy_workqueue(adapter->stats_wq);
+err_stats_wq_alloc:
+	destroy_workqueue(adapter->mbx_wq);
+err_mbx_wq_alloc:
+	destroy_workqueue(adapter->serv_wq);
+err_serv_wq_alloc:
+	destroy_workqueue(adapter->init_wq);
+err_free:
+	kfree(adapter);
+	return err;
+}
+
+/* idpf_pci_tbl - PCI Dev idpf ID Table
+ */
+static const struct pci_device_id idpf_pci_tbl[] = {
+	{ PCI_VDEVICE(INTEL, IDPF_DEV_ID_PF)},
+	{ PCI_VDEVICE(INTEL, IDPF_DEV_ID_VF)},
+	{ PCI_DEVICE_CLASS(IDPF_CLASS_NETWORK_ETHERNET_PROGIF, ~0)},
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(pci, idpf_pci_tbl);
+
+static struct pci_driver idpf_driver = {
+	.name			= KBUILD_MODNAME,
+	.id_table		= idpf_pci_tbl,
+	.probe			= idpf_probe,
+	.sriov_configure	= idpf_sriov_configure,
+	.remove			= idpf_remove,
+	.shutdown		= idpf_shutdown,
+};
+module_pci_driver(idpf_driver);