// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
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/*
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* Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/utsname.h>
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#include <linux/version.h>
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#include <rdma/ib_user_verbs.h>
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#include "efa.h"
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#define PCI_DEV_ID_EFA0_VF 0xefa0
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#define PCI_DEV_ID_EFA1_VF 0xefa1
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static const struct pci_device_id efa_pci_tbl[] = {
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{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA0_VF) },
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{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA1_VF) },
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{ }
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};
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MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION(DEVICE_NAME);
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MODULE_DEVICE_TABLE(pci, efa_pci_tbl);
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#define EFA_REG_BAR 0
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#define EFA_MEM_BAR 2
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#define EFA_BASE_BAR_MASK (BIT(EFA_REG_BAR) | BIT(EFA_MEM_BAR))
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#define EFA_AENQ_ENABLED_GROUPS \
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(BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
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BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
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/* This handler will called for unknown event group or unimplemented handlers */
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static void unimplemented_aenq_handler(void *data,
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struct efa_admin_aenq_entry *aenq_e)
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{
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struct efa_dev *dev = (struct efa_dev *)data;
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ibdev_err(&dev->ibdev,
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"Unknown event was received or event with unimplemented handler\n");
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}
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static void efa_keep_alive(void *data, struct efa_admin_aenq_entry *aenq_e)
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{
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struct efa_dev *dev = (struct efa_dev *)data;
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atomic64_inc(&dev->stats.keep_alive_rcvd);
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}
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static struct efa_aenq_handlers aenq_handlers = {
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.handlers = {
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[EFA_ADMIN_KEEP_ALIVE] = efa_keep_alive,
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},
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.unimplemented_handler = unimplemented_aenq_handler
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};
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static void efa_release_bars(struct efa_dev *dev, int bars_mask)
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{
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struct pci_dev *pdev = dev->pdev;
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int release_bars;
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release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & bars_mask;
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pci_release_selected_regions(pdev, release_bars);
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}
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static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
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{
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struct efa_dev *dev = data;
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efa_com_admin_q_comp_intr_handler(&dev->edev);
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efa_com_aenq_intr_handler(&dev->edev, data);
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return IRQ_HANDLED;
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}
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static int efa_request_mgmnt_irq(struct efa_dev *dev)
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{
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struct efa_irq *irq;
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int err;
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irq = &dev->admin_irq;
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err = request_irq(irq->vector, irq->handler, 0, irq->name,
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irq->data);
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if (err) {
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dev_err(&dev->pdev->dev, "Failed to request admin irq (%d)\n",
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err);
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return err;
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}
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dev_dbg(&dev->pdev->dev, "Set affinity hint of mgmnt irq to %*pbl (irq vector: %d)\n",
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nr_cpumask_bits, &irq->affinity_hint_mask, irq->vector);
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irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
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return 0;
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}
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static void efa_setup_mgmnt_irq(struct efa_dev *dev)
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{
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u32 cpu;
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snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE,
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"efa-mgmnt@pci:%s", pci_name(dev->pdev));
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dev->admin_irq.handler = efa_intr_msix_mgmnt;
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dev->admin_irq.data = dev;
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dev->admin_irq.vector =
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pci_irq_vector(dev->pdev, dev->admin_msix_vector_idx);
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cpu = cpumask_first(cpu_online_mask);
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dev->admin_irq.cpu = cpu;
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cpumask_set_cpu(cpu,
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&dev->admin_irq.affinity_hint_mask);
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dev_info(&dev->pdev->dev, "Setup irq:0x%p vector:%d name:%s\n",
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&dev->admin_irq,
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dev->admin_irq.vector,
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dev->admin_irq.name);
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}
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static void efa_free_mgmnt_irq(struct efa_dev *dev)
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{
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struct efa_irq *irq;
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irq = &dev->admin_irq;
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irq_set_affinity_hint(irq->vector, NULL);
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free_irq(irq->vector, irq->data);
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}
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static int efa_set_mgmnt_irq(struct efa_dev *dev)
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{
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efa_setup_mgmnt_irq(dev);
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return efa_request_mgmnt_irq(dev);
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}
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static int efa_request_doorbell_bar(struct efa_dev *dev)
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{
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u8 db_bar_idx = dev->dev_attr.db_bar;
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struct pci_dev *pdev = dev->pdev;
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int bars;
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int err;
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if (!(BIT(db_bar_idx) & EFA_BASE_BAR_MASK)) {
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bars = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(db_bar_idx);
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err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
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if (err) {
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dev_err(&dev->pdev->dev,
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"pci_request_selected_regions for bar %d failed %d\n",
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db_bar_idx, err);
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return err;
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}
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}
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dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx);
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dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx);
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return 0;
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}
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static void efa_release_doorbell_bar(struct efa_dev *dev)
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{
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if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK))
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efa_release_bars(dev, BIT(dev->dev_attr.db_bar));
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}
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static void efa_update_hw_hints(struct efa_dev *dev,
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struct efa_com_get_hw_hints_result *hw_hints)
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{
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struct efa_com_dev *edev = &dev->edev;
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if (hw_hints->mmio_read_timeout)
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edev->mmio_read.mmio_read_timeout =
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hw_hints->mmio_read_timeout * 1000;
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if (hw_hints->poll_interval)
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edev->aq.poll_interval = hw_hints->poll_interval;
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if (hw_hints->admin_completion_timeout)
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edev->aq.completion_timeout =
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hw_hints->admin_completion_timeout;
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}
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static void efa_stats_init(struct efa_dev *dev)
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{
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atomic64_t *s = (atomic64_t *)&dev->stats;
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int i;
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for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++)
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atomic64_set(s, 0);
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}
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static void efa_set_host_info(struct efa_dev *dev)
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{
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struct efa_admin_set_feature_resp resp = {};
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struct efa_admin_set_feature_cmd cmd = {};
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struct efa_admin_host_info *hinf;
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u32 bufsz = sizeof(*hinf);
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dma_addr_t hinf_dma;
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if (!efa_com_check_supported_feature_id(&dev->edev,
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EFA_ADMIN_HOST_INFO))
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return;
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/* Failures in host info set shall not disturb probe */
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hinf = dma_alloc_coherent(&dev->pdev->dev, bufsz, &hinf_dma,
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GFP_KERNEL);
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if (!hinf)
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return;
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strlcpy(hinf->os_dist_str, utsname()->release,
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min(sizeof(hinf->os_dist_str), sizeof(utsname()->release)));
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hinf->os_type = EFA_ADMIN_OS_LINUX;
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strlcpy(hinf->kernel_ver_str, utsname()->version,
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min(sizeof(hinf->kernel_ver_str), sizeof(utsname()->version)));
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hinf->kernel_ver = LINUX_VERSION_CODE;
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EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MAJOR, 0);
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EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MINOR, 0);
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EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_SUB_MINOR, 0);
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EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE, 0);
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EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_BUS, dev->pdev->bus->number);
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EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_DEVICE,
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PCI_SLOT(dev->pdev->devfn));
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EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_FUNCTION,
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PCI_FUNC(dev->pdev->devfn));
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EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MAJOR,
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EFA_COMMON_SPEC_VERSION_MAJOR);
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EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MINOR,
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EFA_COMMON_SPEC_VERSION_MINOR);
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EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_INTREE, 1);
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EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_GDR, 0);
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efa_com_set_feature_ex(&dev->edev, &resp, &cmd, EFA_ADMIN_HOST_INFO,
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hinf_dma, bufsz);
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dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma);
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}
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static const struct ib_device_ops efa_dev_ops = {
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.owner = THIS_MODULE,
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.driver_id = RDMA_DRIVER_EFA,
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.uverbs_abi_ver = EFA_UVERBS_ABI_VERSION,
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.alloc_hw_stats = efa_alloc_hw_stats,
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.alloc_pd = efa_alloc_pd,
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.alloc_ucontext = efa_alloc_ucontext,
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.create_ah = efa_create_ah,
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.create_cq = efa_create_cq,
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.create_qp = efa_create_qp,
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.dealloc_pd = efa_dealloc_pd,
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.dealloc_ucontext = efa_dealloc_ucontext,
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.dereg_mr = efa_dereg_mr,
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.destroy_ah = efa_destroy_ah,
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.destroy_cq = efa_destroy_cq,
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.destroy_qp = efa_destroy_qp,
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.get_hw_stats = efa_get_hw_stats,
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.get_link_layer = efa_port_link_layer,
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.get_port_immutable = efa_get_port_immutable,
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.mmap = efa_mmap,
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.mmap_free = efa_mmap_free,
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.modify_qp = efa_modify_qp,
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.query_device = efa_query_device,
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.query_gid = efa_query_gid,
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.query_pkey = efa_query_pkey,
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.query_port = efa_query_port,
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.query_qp = efa_query_qp,
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.reg_user_mr = efa_reg_mr,
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INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
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INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
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INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
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INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
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};
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static int efa_ib_device_add(struct efa_dev *dev)
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{
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struct efa_com_get_hw_hints_result hw_hints;
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struct pci_dev *pdev = dev->pdev;
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int err;
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efa_stats_init(dev);
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err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr);
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if (err)
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return err;
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dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
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err = efa_request_doorbell_bar(dev);
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if (err)
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return err;
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err = efa_com_get_hw_hints(&dev->edev, &hw_hints);
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if (err)
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goto err_release_doorbell_bar;
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efa_update_hw_hints(dev, &hw_hints);
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/* Try to enable all the available aenq groups */
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err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS);
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if (err)
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goto err_release_doorbell_bar;
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efa_set_host_info(dev);
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dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
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dev->ibdev.phys_port_cnt = 1;
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dev->ibdev.num_comp_vectors = 1;
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dev->ibdev.dev.parent = &pdev->dev;
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dev->ibdev.uverbs_cmd_mask =
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(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
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(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
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(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) |
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(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
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(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
|
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
|
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
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(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
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(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
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(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
|
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
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(1ull << IB_USER_VERBS_CMD_CREATE_AH) |
|
(1ull << IB_USER_VERBS_CMD_DESTROY_AH);
|
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ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
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|
err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);
|
if (err)
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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) {
|
efa_disable_msix(dev);
|
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;
|
}
|
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);
|
