blob: 15ee9208111879979104aa47f3b3eeeabf02c2e4 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
/*
* Copyright 2018-2022 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
#define PCI_DEV_ID_EFA2_VF 0xefa2
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) },
{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA2_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 void efa_process_comp_eqe(struct efa_dev *dev, struct efa_admin_eqe *eqe)
{
u16 cqn = eqe->u.comp_event.cqn;
struct efa_cq *cq;
/* Safe to load as we're in irq and removal calls synchronize_irq() */
cq = xa_load(&dev->cqs_xa, cqn);
if (unlikely(!cq)) {
ibdev_err_ratelimited(&dev->ibdev,
"Completion event on non-existent CQ[%u]",
cqn);
return;
}
cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
}
static void efa_process_eqe(struct efa_com_eq *eeq, struct efa_admin_eqe *eqe)
{
struct efa_dev *dev = container_of(eeq->edev, struct efa_dev, edev);
if (likely(EFA_GET(&eqe->common, EFA_ADMIN_EQE_EVENT_TYPE) ==
EFA_ADMIN_EQE_EVENT_TYPE_COMPLETION))
efa_process_comp_eqe(dev, eqe);
else
ibdev_err_ratelimited(&dev->ibdev,
"Unknown event type received %lu",
EFA_GET(&eqe->common,
EFA_ADMIN_EQE_EVENT_TYPE));
}
static irqreturn_t efa_intr_msix_comp(int irq, void *data)
{
struct efa_eq *eq = data;
struct efa_com_dev *edev = eq->eeq.edev;
efa_com_eq_comp_intr_handler(edev, &eq->eeq);
return IRQ_HANDLED;
}
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_irq(struct efa_dev *dev, struct efa_irq *irq)
{
int err;
err = request_irq(irq->irqn, irq->handler, 0, irq->name, irq->data);
if (err) {
dev_err(&dev->pdev->dev, "Failed to request irq %s (%d)\n",
irq->name, err);
return err;
}
irq_set_affinity_hint(irq->irqn, &irq->affinity_hint_mask);
return 0;
}
static void efa_setup_comp_irq(struct efa_dev *dev, struct efa_eq *eq,
int vector)
{
u32 cpu;
cpu = vector - EFA_COMP_EQS_VEC_BASE;
snprintf(eq->irq.name, EFA_IRQNAME_SIZE, "efa-comp%d@pci:%s", cpu,
pci_name(dev->pdev));
eq->irq.handler = efa_intr_msix_comp;
eq->irq.data = eq;
eq->irq.vector = vector;
eq->irq.irqn = pci_irq_vector(dev->pdev, vector);
cpumask_set_cpu(cpu, &eq->irq.affinity_hint_mask);
}
static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
{
irq_set_affinity_hint(irq->irqn, NULL);
free_irq(irq->irqn, irq->data);
}
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 = dev->admin_msix_vector_idx;
dev->admin_irq.irqn = pci_irq_vector(dev->pdev,
dev->admin_msix_vector_idx);
cpu = cpumask_first(cpu_online_mask);
cpumask_set_cpu(cpu,
&dev->admin_irq.affinity_hint_mask);
dev_info(&dev->pdev->dev, "Setup irq:%d name:%s\n",
dev->admin_irq.irqn,
dev->admin_irq.name);
}
static int efa_set_mgmnt_irq(struct efa_dev *dev)
{
efa_setup_mgmnt_irq(dev);
return efa_request_irq(dev, &dev->admin_irq);
}
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;
strscpy(hinf->os_dist_str, utsname()->release,
sizeof(hinf->os_dist_str));
hinf->os_type = EFA_ADMIN_OS_LINUX;
strscpy(hinf->kernel_ver_str, utsname()->version,
sizeof(hinf->kernel_ver_str));
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 void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
{
efa_com_eq_destroy(&dev->edev, &eq->eeq);
efa_free_irq(dev, &eq->irq);
}
static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u8 msix_vec)
{
int err;
efa_setup_comp_irq(dev, eq, msix_vec);
err = efa_request_irq(dev, &eq->irq);
if (err)
return err;
err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe,
dev->dev_attr.max_eq_depth, msix_vec);
if (err)
goto err_free_comp_irq;
return 0;
err_free_comp_irq:
efa_free_irq(dev, &eq->irq);
return err;
}
static int efa_create_eqs(struct efa_dev *dev)
{
unsigned int neqs = dev->dev_attr.max_eq;
int err;
int i;
neqs = min_t(unsigned int, neqs, num_online_cpus());
dev->neqs = neqs;
dev->eqs = kcalloc(neqs, sizeof(*dev->eqs), GFP_KERNEL);
if (!dev->eqs)
return -ENOMEM;
for (i = 0; i < neqs; i++) {
err = efa_create_eq(dev, &dev->eqs[i],
i + EFA_COMP_EQS_VEC_BASE);
if (err)
goto err_destroy_eqs;
}
return 0;
err_destroy_eqs:
for (i--; i >= 0; i--)
efa_destroy_eq(dev, &dev->eqs[i]);
kfree(dev->eqs);
return err;
}
static void efa_destroy_eqs(struct efa_dev *dev)
{
int i;
for (i = 0; i < dev->neqs; i++)
efa_destroy_eq(dev, &dev->eqs[i]);
kfree(dev->eqs);
}
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_port_stats = efa_alloc_hw_port_stats,
.alloc_hw_device_stats = efa_alloc_hw_device_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,
.reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
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_qp, efa_qp, ibqp),
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;
err = efa_create_eqs(dev);
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 = dev->neqs ?: 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_destroy_eqs;
ibdev_info(&dev->ibdev, "IB device registered\n");
return 0;
err_destroy_eqs:
efa_destroy_eqs(dev);
err_release_doorbell_bar:
efa_release_doorbell_bar(dev);
return err;
}
static void efa_ib_device_remove(struct efa_dev *dev)
{
ibdev_info(&dev->ibdev, "Unregister ib device\n");
ib_unregister_device(&dev->ibdev);
efa_destroy_eqs(dev);
efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_NORMAL);
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, one vector is reserved
* for admin.
*/
msix_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
num_online_cpus() + 1);
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 = 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;
xa_init(&dev->cqs_xa);
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_irq(dev, &dev->admin_irq);
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_irq(dev, &dev->admin_irq);
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);
xa_destroy(&dev->cqs_xa);
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);