netdev - Re: [RFC PATCH v5 01/16] RDMA/irdma: Add driver framework definitions

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Date:   Fri, 17 Apr 2020 16:37:36 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     gregkh@...uxfoundation.org,
        Mustafa Ismail <mustafa.ismail@...el.com>,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com,
        Shiraz Saleem <shiraz.saleem@...el.com>
Subject: Re: [RFC PATCH v5 01/16] RDMA/irdma: Add driver framework definitions

On Fri, Apr 17, 2020 at 10:12:36AM -0700, Jeff Kirsher wrote:

> +/* client interface functions */
> +static const struct i40e_client_ops i40e_ops = {
> +	.open = i40iw_open,
> +	.close = i40iw_close,
> +	.l2_param_change = i40iw_l2param_change
> +};
> +
> +static struct i40e_client i40iw_client = {
> +	.name = "irdma",
> +	.ops = &i40e_ops,
> +	.type = I40E_CLIENT_IWARP,
> +};
> +
> +int i40iw_probe_dev(struct virtbus_device *vdev)
> +{
> +	struct i40e_virtbus_device *i40e_vdev =
> +			container_of(vdev, struct i40e_virtbus_device, vdev);
> +	struct i40e_info *ldev = i40e_vdev->ldev;
> +
> +	ldev->client = &i40iw_client;
> +
> +	return ldev->ops->client_device_register(ldev);
> +}
> +
> +int i40iw_remove_dev(struct virtbus_device *vdev)
> +{
> +	struct i40e_virtbus_device *i40e_vdev =
> +			container_of(vdev, struct i40e_virtbus_device, vdev);
> +	struct i40e_info *ldev = i40e_vdev->ldev;
> +
> +	ldev->ops->client_device_unregister(ldev);
> +
> +	return 0;
> +}

This would be alot more compelling if the driver didn't go on to just
another crufty layer of register/unregister.

It feels like the virtbus was just dumped on top of the existing
scheme without properly reworking it.

> diff --git a/drivers/infiniband/hw/irdma/main.c b/drivers/infiniband/hw/irdma/main.c
> new file mode 100644
> index 000000000000..8075b7bf6ae8
> +++ b/drivers/infiniband/hw/irdma/main.c
> @@ -0,0 +1,573 @@
> +// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
> +/* Copyright (c) 2015 - 2019 Intel Corporation */
> +#include "main.h"
> +
> +bool irdma_upload_context;
> +
> +MODULE_ALIAS("i40iw");

I'm not sure you can do this without deleting i40iw

Jason