drivers/infiniband/hw/mana/wq.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/mana/wq.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/mana/wq.c
Extension
.c
Size
2027 bytes
Lines
87
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-only
/*
 * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
 */

#include "mana_ib.h"

struct ib_wq *mana_ib_create_wq(struct ib_pd *pd,
				struct ib_wq_init_attr *init_attr,
				struct ib_udata *udata)
{
	struct mana_ib_dev *mdev =
		container_of(pd->device, struct mana_ib_dev, ib_dev);
	struct mana_ib_create_wq ucmd;
	struct mana_ib_wq *wq;
	int err;

	err = ib_copy_validate_udata_in(udata, ucmd, reserved);
	if (err)
		return ERR_PTR(err);

	wq = kzalloc_obj(*wq);
	if (!wq)
		return ERR_PTR(-ENOMEM);

	ibdev_dbg(&mdev->ib_dev, "ucmd wq_buf_addr 0x%llx\n", ucmd.wq_buf_addr);

	err = mana_ib_create_queue(mdev, ucmd.wq_buf_addr, ucmd.wq_buf_size, &wq->queue);
	if (err) {
		ibdev_dbg(&mdev->ib_dev,
			  "Failed to create queue for create wq, %d\n", err);
		goto err_free_wq;
	}

	wq->wqe = init_attr->max_wr;
	wq->wq_buf_size = ucmd.wq_buf_size;
	wq->rx_object = INVALID_MANA_HANDLE;
	return &wq->ibwq;

err_free_wq:
	kfree(wq);

	return ERR_PTR(err);
}

int mana_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
		      u32 wq_attr_mask, struct ib_udata *udata)
{
	/* modify_wq is not supported by this version of the driver */
	return -EOPNOTSUPP;
}

int mana_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
{
	struct mana_ib_wq *wq = container_of(ibwq, struct mana_ib_wq, ibwq);
	struct ib_device *ib_dev = ibwq->device;
	struct mana_ib_dev *mdev;

	mdev = container_of(ib_dev, struct mana_ib_dev, ib_dev);

	mana_ib_destroy_queue(mdev, &wq->queue);

	kfree(wq);

	return 0;
}

int mana_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_table,
				 struct ib_rwq_ind_table_init_attr *init_attr,
				 struct ib_udata *udata)
{
	/*
	 * There is no additional data in ind_table to be maintained by this
	 * driver, do nothing
	 */
	return 0;
}

int mana_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
{
	/*
	 * There is no additional data in ind_table to be maintained by this
	 * driver, do nothing
	 */
	return 0;
}

Annotation

Implementation Notes