diff options
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_main.c | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/efa/efa_main.c b/drivers/infiniband/hw/efa/efa_main.c new file mode 100644 index 000000000000..db974caf1eb1 --- /dev/null +++ b/drivers/infiniband/hw/efa/efa_main.c @@ -0,0 +1,533 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause +/* + * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved. + */ + +#include <linux/module.h> +#include <linux/pci.h> + +#include <rdma/ib_user_verbs.h> + +#include "efa.h" + +#define PCI_DEV_ID_EFA_VF 0xefa0 + +static const struct pci_device_id efa_pci_tbl[] = { + { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA_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)) + +static void efa_update_network_attr(struct efa_dev *dev, + struct efa_com_get_network_attr_result *network_attr) +{ + memcpy(dev->addr, network_attr->addr, sizeof(network_attr->addr)); + dev->mtu = network_attr->mtu; + + dev_dbg(&dev->pdev->dev, "Full address %pI6\n", dev->addr); +} + +/* 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 err; +} + +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 const struct ib_device_ops efa_dev_ops = { + .alloc_pd = efa_alloc_pd, + .alloc_ucontext = efa_alloc_ucontext, + .create_ah = efa_create_ah, + .create_cq = efa_create_cq, + .create_qp = efa_create_qp, + .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_link_layer = efa_port_link_layer, + .get_port_immutable = efa_get_port_immutable, + .mmap = efa_mmap, + .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_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_network_attr_result network_attr; + 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_network_attr(&dev->edev, &network_attr); + if (err) + goto err_release_doorbell_bar; + + efa_update_network_attr(dev, &network_attr); + + 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; + + dev->ibdev.owner = THIS_MODULE; + 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; + dev->ibdev.uverbs_abi_ver = EFA_UVERBS_ABI_VERSION; + + dev->ibdev.uverbs_cmd_mask = + (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | + (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | + (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | + (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | + (1ull << IB_USER_VERBS_CMD_REG_MR) | + (1ull << IB_USER_VERBS_CMD_DEREG_MR) | + (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | + (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | + (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | + (1ull << IB_USER_VERBS_CMD_CREATE_QP) | + (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | + (1ull << IB_USER_VERBS_CMD_QUERY_QP) | + (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | + (1ull << IB_USER_VERBS_CMD_CREATE_AH) | + (1ull << IB_USER_VERBS_CMD_DESTROY_AH); + + dev->ibdev.uverbs_ex_cmd_mask = + (1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE); + + dev->ibdev.driver_id = RDMA_DRIVER_EFA; + ib_set_device_ops(&dev->ibdev, &efa_dev_ops); + + err = ib_register_device(&dev->ibdev, "efa_%d"); + 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width)); + if (err) { + dev_err(&pdev->dev, "pci_set_dma_mask failed %d\n", err); + return err; + } + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width)); + if (err) { + dev_err(&pdev->dev, + "err_pci_set_consistent_dma_mask failed %d\n", + err); + return err; + } + + 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); |