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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
#include <linux/module.h>
#include <linux/printk.h>
#include <net/addrconf.h>
#include "ionic_ibdev.h"
#define DRIVER_DESCRIPTION "AMD Pensando RoCE HCA driver"
#define DEVICE_DESCRIPTION "AMD Pensando RoCE HCA"
MODULE_AUTHOR("Allen Hubbe <allen.hubbe@amd.com>");
MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("NET_IONIC");
static const struct ib_device_ops ionic_dev_ops = {
.owner = THIS_MODULE,
.driver_id = RDMA_DRIVER_IONIC,
.uverbs_abi_ver = IONIC_ABI_VERSION,
.alloc_ucontext = ionic_alloc_ucontext,
.dealloc_ucontext = ionic_dealloc_ucontext,
.mmap = ionic_mmap,
.mmap_free = ionic_mmap_free,
.alloc_pd = ionic_alloc_pd,
.dealloc_pd = ionic_dealloc_pd,
.create_ah = ionic_create_ah,
.query_ah = ionic_query_ah,
.destroy_ah = ionic_destroy_ah,
.create_user_ah = ionic_create_ah,
.get_dma_mr = ionic_get_dma_mr,
.reg_user_mr = ionic_reg_user_mr,
.reg_user_mr_dmabuf = ionic_reg_user_mr_dmabuf,
.dereg_mr = ionic_dereg_mr,
.alloc_mr = ionic_alloc_mr,
.map_mr_sg = ionic_map_mr_sg,
.alloc_mw = ionic_alloc_mw,
.dealloc_mw = ionic_dealloc_mw,
.create_cq = ionic_create_cq,
.destroy_cq = ionic_destroy_cq,
.create_qp = ionic_create_qp,
.modify_qp = ionic_modify_qp,
.query_qp = ionic_query_qp,
.destroy_qp = ionic_destroy_qp,
.post_send = ionic_post_send,
.post_recv = ionic_post_recv,
.poll_cq = ionic_poll_cq,
.req_notify_cq = ionic_req_notify_cq,
INIT_RDMA_OBJ_SIZE(ib_ucontext, ionic_ctx, ibctx),
INIT_RDMA_OBJ_SIZE(ib_pd, ionic_pd, ibpd),
INIT_RDMA_OBJ_SIZE(ib_ah, ionic_ah, ibah),
INIT_RDMA_OBJ_SIZE(ib_cq, ionic_vcq, ibcq),
INIT_RDMA_OBJ_SIZE(ib_qp, ionic_qp, ibqp),
INIT_RDMA_OBJ_SIZE(ib_mw, ionic_mr, ibmw),
};
static void ionic_init_resids(struct ionic_ibdev *dev)
{
ionic_resid_init(&dev->inuse_cqid, dev->lif_cfg.cq_count);
dev->half_cqid_udma_shift =
order_base_2(dev->lif_cfg.cq_count / dev->lif_cfg.udma_count);
ionic_resid_init(&dev->inuse_pdid, IONIC_MAX_PD);
ionic_resid_init(&dev->inuse_ahid, dev->lif_cfg.nahs_per_lif);
ionic_resid_init(&dev->inuse_mrid, dev->lif_cfg.nmrs_per_lif);
/* skip reserved lkey */
dev->next_mrkey = 1;
ionic_resid_init(&dev->inuse_qpid, dev->lif_cfg.qp_count);
/* skip reserved SMI and GSI qpids */
dev->half_qpid_udma_shift =
order_base_2(dev->lif_cfg.qp_count / dev->lif_cfg.udma_count);
ionic_resid_init(&dev->inuse_dbid, dev->lif_cfg.dbid_count);
}
static void ionic_destroy_resids(struct ionic_ibdev *dev)
{
ionic_resid_destroy(&dev->inuse_cqid);
ionic_resid_destroy(&dev->inuse_pdid);
ionic_resid_destroy(&dev->inuse_ahid);
ionic_resid_destroy(&dev->inuse_mrid);
ionic_resid_destroy(&dev->inuse_qpid);
ionic_resid_destroy(&dev->inuse_dbid);
}
static void ionic_destroy_ibdev(struct ionic_ibdev *dev)
{
ionic_kill_rdma_admin(dev, false);
ib_unregister_device(&dev->ibdev);
ionic_destroy_rdma_admin(dev);
ionic_destroy_resids(dev);
WARN_ON(!xa_empty(&dev->qp_tbl));
xa_destroy(&dev->qp_tbl);
WARN_ON(!xa_empty(&dev->cq_tbl));
xa_destroy(&dev->cq_tbl);
ib_dealloc_device(&dev->ibdev);
}
static struct ionic_ibdev *ionic_create_ibdev(struct ionic_aux_dev *ionic_adev)
{
struct ib_device *ibdev;
struct ionic_ibdev *dev;
struct net_device *ndev;
int rc;
dev = ib_alloc_device(ionic_ibdev, ibdev);
if (!dev)
return ERR_PTR(-EINVAL);
ionic_fill_lif_cfg(ionic_adev->lif, &dev->lif_cfg);
xa_init_flags(&dev->qp_tbl, GFP_ATOMIC);
xa_init_flags(&dev->cq_tbl, GFP_ATOMIC);
ionic_init_resids(dev);
rc = ionic_rdma_reset_devcmd(dev);
if (rc)
goto err_reset;
rc = ionic_create_rdma_admin(dev);
if (rc)
goto err_admin;
ibdev = &dev->ibdev;
ibdev->dev.parent = dev->lif_cfg.hwdev;
strscpy(ibdev->name, "ionic_%d", IB_DEVICE_NAME_MAX);
strscpy(ibdev->node_desc, DEVICE_DESCRIPTION, IB_DEVICE_NODE_DESC_MAX);
ibdev->node_type = RDMA_NODE_IB_CA;
ibdev->phys_port_cnt = 1;
/* the first two eq are reserved for async events */
ibdev->num_comp_vectors = dev->lif_cfg.eq_count - 2;
ndev = ionic_lif_netdev(ionic_adev->lif);
addrconf_ifid_eui48((u8 *)&ibdev->node_guid, ndev);
rc = ib_device_set_netdev(ibdev, ndev, 1);
/* ionic_lif_netdev() returns ndev with refcount held */
dev_put(ndev);
if (rc)
goto err_admin;
ib_set_device_ops(&dev->ibdev, &ionic_dev_ops);
rc = ib_register_device(ibdev, "ionic_%d", ibdev->dev.parent);
if (rc)
goto err_register;
return dev;
err_register:
err_admin:
ionic_kill_rdma_admin(dev, false);
ionic_destroy_rdma_admin(dev);
err_reset:
ionic_destroy_resids(dev);
xa_destroy(&dev->qp_tbl);
xa_destroy(&dev->cq_tbl);
ib_dealloc_device(&dev->ibdev);
return ERR_PTR(rc);
}
static int ionic_aux_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct ionic_aux_dev *ionic_adev;
struct ionic_ibdev *dev;
ionic_adev = container_of(adev, struct ionic_aux_dev, adev);
dev = ionic_create_ibdev(ionic_adev);
if (IS_ERR(dev))
return dev_err_probe(&adev->dev, PTR_ERR(dev),
"Failed to register ibdev\n");
auxiliary_set_drvdata(adev, dev);
ibdev_dbg(&dev->ibdev, "registered\n");
return 0;
}
static void ionic_aux_remove(struct auxiliary_device *adev)
{
struct ionic_ibdev *dev = auxiliary_get_drvdata(adev);
dev_dbg(&adev->dev, "unregister ibdev\n");
ionic_destroy_ibdev(dev);
dev_dbg(&adev->dev, "unregistered\n");
}
static const struct auxiliary_device_id ionic_aux_id_table[] = {
{ .name = "ionic.rdma", },
{},
};
MODULE_DEVICE_TABLE(auxiliary, ionic_aux_id_table);
static struct auxiliary_driver ionic_aux_r_driver = {
.name = "rdma",
.probe = ionic_aux_probe,
.remove = ionic_aux_remove,
.id_table = ionic_aux_id_table,
};
static int __init ionic_mod_init(void)
{
int rc;
ionic_evt_workq = create_workqueue(KBUILD_MODNAME "-evt");
if (!ionic_evt_workq)
return -ENOMEM;
rc = auxiliary_driver_register(&ionic_aux_r_driver);
if (rc)
goto err_aux;
return 0;
err_aux:
destroy_workqueue(ionic_evt_workq);
return rc;
}
static void __exit ionic_mod_exit(void)
{
auxiliary_driver_unregister(&ionic_aux_r_driver);
destroy_workqueue(ionic_evt_workq);
}
module_init(ionic_mod_init);
module_exit(ionic_mod_exit);
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