// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause /* * Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved. */ #include <linux/module.h> #include <linux/pci.h> #include <linux/utsname.h> #include <linux/version.h> #include <rdma/ib_user_verbs.h> #include "efa.h" #define PCI_DEV_ID_EFA0_VF 0xefa0 #define PCI_DEV_ID_EFA1_VF 0xefa1 static const struct pci_device_id efa_pci_tbl[] = { { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA0_VF) }, { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA1_VF) }, { } }; MODULE_AUTHOR("Amazon.com, Inc. or its affiliates"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_DESCRIPTION(DEVICE_NAME); MODULE_DEVICE_TABLE(pci, efa_pci_tbl); #define EFA_REG_BAR 0 #define EFA_MEM_BAR 2 #define EFA_BASE_BAR_MASK (BIT(EFA_REG_BAR) | BIT(EFA_MEM_BAR)) #define EFA_AENQ_ENABLED_GROUPS \ (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \ BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE)) /* This handler will called for unknown event group or unimplemented handlers */ static void unimplemented_aenq_handler(void *data, struct efa_admin_aenq_entry *aenq_e) { struct efa_dev *dev = (struct efa_dev *)data; ibdev_err(&dev->ibdev, "Unknown event was received or event with unimplemented handler\n"); } static void efa_keep_alive(void *data, struct efa_admin_aenq_entry *aenq_e) { struct efa_dev *dev = (struct efa_dev *)data; atomic64_inc(&dev->stats.keep_alive_rcvd); } static struct efa_aenq_handlers aenq_handlers = { .handlers = { [EFA_ADMIN_KEEP_ALIVE] = efa_keep_alive, }, .unimplemented_handler = unimplemented_aenq_handler }; static void efa_release_bars(struct efa_dev *dev, int bars_mask) { struct pci_dev *pdev = dev->pdev; int release_bars; release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & bars_mask; pci_release_selected_regions(pdev, release_bars); } static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data) { struct efa_dev *dev = data; efa_com_admin_q_comp_intr_handler(&dev->edev); efa_com_aenq_intr_handler(&dev->edev, data); return IRQ_HANDLED; } static int efa_request_mgmnt_irq(struct efa_dev *dev) { struct efa_irq *irq; int err; irq = &dev->admin_irq; err = request_irq(irq->vector, irq->handler, 0, irq->name, irq->data); if (err) { dev_err(&dev->pdev->dev, "Failed to request admin irq (%d)\n", err); return err; } dev_dbg(&dev->pdev->dev, "Set affinity hint of mgmnt irq to %*pbl (irq vector: %d)\n", nr_cpumask_bits, &irq->affinity_hint_mask, irq->vector); irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask); return 0; } static void efa_setup_mgmnt_irq(struct efa_dev *dev) { u32 cpu; snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE, "efa-mgmnt@pci:%s", pci_name(dev->pdev)); dev->admin_irq.handler = efa_intr_msix_mgmnt; dev->admin_irq.data = dev; dev->admin_irq.vector = pci_irq_vector(dev->pdev, dev->admin_msix_vector_idx); cpu = cpumask_first(cpu_online_mask); dev->admin_irq.cpu = cpu; cpumask_set_cpu(cpu, &dev->admin_irq.affinity_hint_mask); dev_info(&dev->pdev->dev, "Setup irq:0x%p vector:%d name:%s\n", &dev->admin_irq, dev->admin_irq.vector, dev->admin_irq.name); } static void efa_free_mgmnt_irq(struct efa_dev *dev) { struct efa_irq *irq; irq = &dev->admin_irq; irq_set_affinity_hint(irq->vector, NULL); free_irq(irq->vector, irq->data); } static int efa_set_mgmnt_irq(struct efa_dev *dev) { efa_setup_mgmnt_irq(dev); return efa_request_mgmnt_irq(dev); } static int efa_request_doorbell_bar(struct efa_dev *dev) { u8 db_bar_idx = dev->dev_attr.db_bar; struct pci_dev *pdev = dev->pdev; int bars; int err; if (!(BIT(db_bar_idx) & EFA_BASE_BAR_MASK)) { bars = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(db_bar_idx); err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME); if (err) { dev_err(&dev->pdev->dev, "pci_request_selected_regions for bar %d failed %d\n", db_bar_idx, err); return err; } } dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx); dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx); return 0; } static void efa_release_doorbell_bar(struct efa_dev *dev) { if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK)) efa_release_bars(dev, BIT(dev->dev_attr.db_bar)); } static void efa_update_hw_hints(struct efa_dev *dev, struct efa_com_get_hw_hints_result *hw_hints) { struct efa_com_dev *edev = &dev->edev; if (hw_hints->mmio_read_timeout) edev->mmio_read.mmio_read_timeout = hw_hints->mmio_read_timeout * 1000; if (hw_hints->poll_interval) edev->aq.poll_interval = hw_hints->poll_interval; if (hw_hints->admin_completion_timeout) edev->aq.completion_timeout = hw_hints->admin_completion_timeout; } static void efa_stats_init(struct efa_dev *dev) { atomic64_t *s = (atomic64_t *)&dev->stats; int i; for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++) atomic64_set(s, 0); } static void efa_set_host_info(struct efa_dev *dev) { struct efa_admin_set_feature_resp resp = {}; struct efa_admin_set_feature_cmd cmd = {}; struct efa_admin_host_info *hinf; u32 bufsz = sizeof(*hinf); dma_addr_t hinf_dma; if (!efa_com_check_supported_feature_id(&dev->edev, EFA_ADMIN_HOST_INFO)) return; /* Failures in host info set shall not disturb probe */ hinf = dma_alloc_coherent(&dev->pdev->dev, bufsz, &hinf_dma, GFP_KERNEL); if (!hinf) return; strlcpy(hinf->os_dist_str, utsname()->release, min(sizeof(hinf->os_dist_str), sizeof(utsname()->release))); hinf->os_type = EFA_ADMIN_OS_LINUX; strlcpy(hinf->kernel_ver_str, utsname()->version, min(sizeof(hinf->kernel_ver_str), sizeof(utsname()->version))); hinf->kernel_ver = LINUX_VERSION_CODE; EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MAJOR, 0); EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MINOR, 0); EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_SUB_MINOR, 0); EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE, 0); EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_BUS, dev->pdev->bus->number); EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_DEVICE, PCI_SLOT(dev->pdev->devfn)); EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_FUNCTION, PCI_FUNC(dev->pdev->devfn)); EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MAJOR, EFA_COMMON_SPEC_VERSION_MAJOR); EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MINOR, EFA_COMMON_SPEC_VERSION_MINOR); EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_INTREE, 1); EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_GDR, 0); efa_com_set_feature_ex(&dev->edev, &resp, &cmd, EFA_ADMIN_HOST_INFO, hinf_dma, bufsz); dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma); } static const struct ib_device_ops efa_dev_ops = { .owner = THIS_MODULE, .driver_id = RDMA_DRIVER_EFA, .uverbs_abi_ver = EFA_UVERBS_ABI_VERSION, .alloc_hw_stats = efa_alloc_hw_stats, .alloc_pd = efa_alloc_pd, .alloc_ucontext = efa_alloc_ucontext, .create_cq = efa_create_cq, .create_qp = efa_create_qp, .create_user_ah = efa_create_ah, .dealloc_pd = efa_dealloc_pd, .dealloc_ucontext = efa_dealloc_ucontext, .dereg_mr = efa_dereg_mr, .destroy_ah = efa_destroy_ah, .destroy_cq = efa_destroy_cq, .destroy_qp = efa_destroy_qp, .get_hw_stats = efa_get_hw_stats, .get_link_layer = efa_port_link_layer, .get_port_immutable = efa_get_port_immutable, .mmap = efa_mmap, .mmap_free = efa_mmap_free, .modify_qp = efa_modify_qp, .query_device = efa_query_device, .query_gid = efa_query_gid, .query_pkey = efa_query_pkey, .query_port = efa_query_port, .query_qp = efa_query_qp, .reg_user_mr = efa_reg_mr, INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah), INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq), INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd), INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext), }; static int efa_ib_device_add(struct efa_dev *dev) { struct efa_com_get_hw_hints_result hw_hints; struct pci_dev *pdev = dev->pdev; int err; efa_stats_init(dev); err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr); if (err) return err; dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar); err = efa_request_doorbell_bar(dev); if (err) return err; err = efa_com_get_hw_hints(&dev->edev, &hw_hints); if (err) goto err_release_doorbell_bar; efa_update_hw_hints(dev, &hw_hints); /* Try to enable all the available aenq groups */ err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS); if (err) goto err_release_doorbell_bar; efa_set_host_info(dev); dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED; dev->ibdev.phys_port_cnt = 1; dev->ibdev.num_comp_vectors = 1; dev->ibdev.dev.parent = &pdev->dev; ib_set_device_ops(&dev->ibdev, &efa_dev_ops); err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev); if (err) goto err_release_doorbell_bar; ibdev_info(&dev->ibdev, "IB device registered\n"); return 0; err_release_doorbell_bar: efa_release_doorbell_bar(dev); return err; } static void efa_ib_device_remove(struct efa_dev *dev) { efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_NORMAL); ibdev_info(&dev->ibdev, "Unregister ib device\n"); ib_unregister_device(&dev->ibdev); efa_release_doorbell_bar(dev); } static void efa_disable_msix(struct efa_dev *dev) { pci_free_irq_vectors(dev->pdev); } static int efa_enable_msix(struct efa_dev *dev) { int msix_vecs, irq_num; /* Reserve the max msix vectors we might need */ msix_vecs = EFA_NUM_MSIX_VEC; dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n", msix_vecs); dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX; irq_num = pci_alloc_irq_vectors(dev->pdev, msix_vecs, msix_vecs, PCI_IRQ_MSIX); if (irq_num < 0) { dev_err(&dev->pdev->dev, "Failed to enable MSI-X. irq_num %d\n", irq_num); return -ENOSPC; } if (irq_num != msix_vecs) { dev_err(&dev->pdev->dev, "Allocated %d MSI-X (out of %d requested)\n", irq_num, msix_vecs); return -ENOSPC; } return 0; } static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev) { int dma_width; int err; err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL); if (err) return err; err = efa_com_validate_version(edev); if (err) return err; dma_width = efa_com_get_dma_width(edev); if (dma_width < 0) { err = dma_width; return err; } err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_width)); if (err) { dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err); return err; } dma_set_max_seg_size(&pdev->dev, UINT_MAX); return 0; } static struct efa_dev *efa_probe_device(struct pci_dev *pdev) { struct efa_com_dev *edev; struct efa_dev *dev; int bars; int err; err = pci_enable_device_mem(pdev); if (err) { dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n"); return ERR_PTR(err); } pci_set_master(pdev); dev = ib_alloc_device(efa_dev, ibdev); if (!dev) { dev_err(&pdev->dev, "Device alloc failed\n"); err = -ENOMEM; goto err_disable_device; } pci_set_drvdata(pdev, dev); edev = &dev->edev; edev->efa_dev = dev; edev->dmadev = &pdev->dev; dev->pdev = pdev; bars = pci_select_bars(pdev, IORESOURCE_MEM) & EFA_BASE_BAR_MASK; err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME); if (err) { dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n", err); goto err_ibdev_destroy; } dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR); dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR); dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR); dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR); edev->reg_bar = devm_ioremap(&pdev->dev, dev->reg_bar_addr, dev->reg_bar_len); if (!edev->reg_bar) { dev_err(&pdev->dev, "Failed to remap register bar\n"); err = -EFAULT; goto err_release_bars; } err = efa_com_mmio_reg_read_init(edev); if (err) { dev_err(&pdev->dev, "Failed to init readless MMIO\n"); goto err_iounmap; } err = efa_device_init(edev, pdev); if (err) { dev_err(&pdev->dev, "EFA device init failed\n"); if (err == -ETIME) err = -EPROBE_DEFER; goto err_reg_read_destroy; } err = efa_enable_msix(dev); if (err) goto err_reg_read_destroy; edev->aq.msix_vector_idx = dev->admin_msix_vector_idx; edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx; err = efa_set_mgmnt_irq(dev); if (err) goto err_disable_msix; err = efa_com_admin_init(edev, &aenq_handlers); if (err) goto err_free_mgmnt_irq; return dev; err_free_mgmnt_irq: efa_free_mgmnt_irq(dev); err_disable_msix: efa_disable_msix(dev); err_reg_read_destroy: efa_com_mmio_reg_read_destroy(edev); err_iounmap: devm_iounmap(&pdev->dev, edev->reg_bar); err_release_bars: efa_release_bars(dev, EFA_BASE_BAR_MASK); err_ibdev_destroy: ib_dealloc_device(&dev->ibdev); err_disable_device: pci_disable_device(pdev); return ERR_PTR(err); } static void efa_remove_device(struct pci_dev *pdev) { struct efa_dev *dev = pci_get_drvdata(pdev); struct efa_com_dev *edev; edev = &dev->edev; efa_com_admin_destroy(edev); efa_free_mgmnt_irq(dev); efa_disable_msix(dev); efa_com_mmio_reg_read_destroy(edev); devm_iounmap(&pdev->dev, edev->reg_bar); efa_release_bars(dev, EFA_BASE_BAR_MASK); ib_dealloc_device(&dev->ibdev); pci_disable_device(pdev); } static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct efa_dev *dev; int err; dev = efa_probe_device(pdev); if (IS_ERR(dev)) return PTR_ERR(dev); err = efa_ib_device_add(dev); if (err) goto err_remove_device; return 0; err_remove_device: efa_remove_device(pdev); return err; } static void efa_remove(struct pci_dev *pdev) { struct efa_dev *dev = pci_get_drvdata(pdev); efa_ib_device_remove(dev); efa_remove_device(pdev); } static struct pci_driver efa_pci_driver = { .name = DRV_MODULE_NAME, .id_table = efa_pci_tbl, .probe = efa_probe, .remove = efa_remove, }; module_pci_driver(efa_pci_driver);