path: root/drivers/infiniband/sw/rxe/rxe_verbs.c

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */

#include <linux/dma-mapping.h>
#include <net/addrconf.h>
#include <rdma/uverbs_ioctl.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
#include "rxe_hw_counters.h"

static int rxe_query_device(struct ib_device *dev,
			    struct ib_device_attr *attr,
			    struct ib_udata *uhw)
{
	struct rxe_dev *rxe = to_rdev(dev);

	if (uhw->inlen || uhw->outlen)
		return -EINVAL;

	*attr = rxe->attr;
	return 0;
}

static int rxe_query_port(struct ib_device *dev,
			  u8 port_num, struct ib_port_attr *attr)
{
	struct rxe_dev *rxe = to_rdev(dev);
	struct rxe_port *port;
	int rc;

	port = &rxe->port;

	/* *attr being zeroed by the caller, avoid zeroing it here */
	*attr = port->attr;

	mutex_lock(&rxe->usdev_lock);
	rc = ib_get_eth_speed(dev, port_num, &attr->active_speed,
			      &attr->active_width);

	if (attr->state == IB_PORT_ACTIVE)
		attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
	else if (dev_get_flags(rxe->ndev) & IFF_UP)
		attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
	else
		attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;

	mutex_unlock(&rxe->usdev_lock);

	return rc;
}

static int rxe_query_pkey(struct ib_device *device,
			  u8 port_num, u16 index, u16 *pkey)
{
	if (index > 0)
		return -EINVAL;

	*pkey = IB_DEFAULT_PKEY_FULL;
	return 0;
}

static int rxe_modify_device(struct ib_device *dev,
			     int mask, struct ib_device_modify *attr)
{
	struct rxe_dev *rxe = to_rdev(dev);

	if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
		     IB_DEVICE_MODIFY_NODE_DESC))
		return -EOPNOTSUPP;

	if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
		rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);

	if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
		memcpy(rxe->ib_dev.node_desc,
		       attr->node_desc, sizeof(rxe->ib_dev.node_desc));
	}

	return 0;
}

static int rxe_modify_port(struct ib_device *dev,
			   u8 port_num, int mask, struct ib_port_modify *attr)
{
	struct rxe_dev *rxe = to_rdev(dev);
	struct rxe_port *port;

	port = &rxe->port;

	port->attr.port_cap_flags |= attr->set_port_cap_mask;
	port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;

	if (mask & IB_PORT_RESET_QKEY_CNTR)
		port->attr.qkey_viol_cntr = 0;

	return 0;
}

static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
					       u8 port_num)
{
	return IB_LINK_LAYER_ETHERNET;
}

static int rxe_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
{
	struct rxe_dev *rxe = to_rdev(uctx->device);
	struct rxe_ucontext *uc = to_ruc(uctx);

	return rxe_add_to_pool(&rxe->uc_pool, &uc->pelem);
}

static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
{
	struct rxe_ucontext *uc = to_ruc(ibuc);

	rxe_drop_ref(uc);
}

static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
			      struct ib_port_immutable *immutable)
{
	int err;
	struct ib_port_attr attr;

	immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;

	err = ib_query_port(dev, port_num, &attr);
	if (err)