drivers/infiniband/hw/irdma/i40iw_if.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/irdma/i40iw_if.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/irdma/i40iw_if.c
Extension
.c
Size
5939 bytes
Lines
221
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2015 - 2021 Intel Corporation */
#include "main.h"
#include "i40iw_hw.h"
#include <linux/net/intel/i40e_client.h>

static struct i40e_client i40iw_client;

/**
 * i40iw_l2param_change - handle mss change
 * @cdev_info: parent lan device information structure with data/ops
 * @client: client for parameter change
 * @params: new parameters from L2
 */
static void i40iw_l2param_change(struct i40e_info *cdev_info,
				 struct i40e_client *client,
				 struct i40e_params *params)
{
	struct irdma_l2params l2params = {};
	struct irdma_device *iwdev;
	struct ib_device *ibdev;

	ibdev = ib_device_get_by_netdev(cdev_info->netdev, RDMA_DRIVER_IRDMA);
	if (!ibdev)
		return;

	iwdev = to_iwdev(ibdev);

	if (iwdev->vsi.mtu != params->mtu) {
		l2params.mtu_changed = true;
		l2params.mtu = params->mtu;
	}
	irdma_change_l2params(&iwdev->vsi, &l2params);
	ib_device_put(ibdev);
}

/**
 * i40iw_close - client interface operation close for iwarp/uda device
 * @cdev_info: parent lan device information structure with data/ops
 * @client: client to close
 * @reset: flag to indicate close on reset
 *
 * Called by the lan driver during the processing of client unregister
 * Destroy and clean up the driver resources
 */
static void i40iw_close(struct i40e_info *cdev_info, struct i40e_client *client,
			bool reset)
{
	struct irdma_device *iwdev;
	struct ib_device *ibdev;

	ibdev = ib_device_get_by_netdev(cdev_info->netdev, RDMA_DRIVER_IRDMA);
	if (WARN_ON(!ibdev))
		return;

	iwdev = to_iwdev(ibdev);
	if (reset)
		iwdev->rf->reset = true;

	iwdev->iw_status = 0;
	irdma_port_ibevent(iwdev);
	ib_unregister_device_and_put(ibdev);
	pr_debug("INIT: Gen1 PF[%d] close complete\n", PCI_FUNC(cdev_info->pcidev->devfn));
}

static void i40iw_request_reset(struct irdma_pci_f *rf)
{
	struct i40e_info *cdev_info = rf->cdev;

	cdev_info->ops->request_reset(cdev_info, &i40iw_client, 1);
}

static void i40iw_fill_device_info(struct irdma_device *iwdev, struct i40e_info *cdev_info)
{
	struct irdma_pci_f *rf = iwdev->rf;

	rf->rdma_ver = IRDMA_GEN_1;
	rf->sc_dev.hw = &rf->hw;
	rf->sc_dev.hw_attrs.uk_attrs.hw_rev = IRDMA_GEN_1;
	rf->sc_dev.privileged = true;
	rf->gen_ops.request_reset = i40iw_request_reset;
	rf->pcidev = cdev_info->pcidev;
	rf->pf_id = cdev_info->fid;
	rf->hw.hw_addr = cdev_info->hw_addr;
	rf->cdev = cdev_info;
	rf->msix_count = cdev_info->msix_count;
	rf->msix_entries = cdev_info->msix_entries;
	rf->limits_sel = 5;
	rf->protocol_used = IRDMA_IWARP_PROTOCOL_ONLY;
	rf->iwdev = iwdev;

Annotation

Implementation Notes