1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
  4 */
  5
  6#include "mana_ib.h"
  7
  8struct ib_wq *mana_ib_create_wq(struct ib_pd *pd,
  9				struct ib_wq_init_attr *init_attr,
 10				struct ib_udata *udata)
 11{
 12	struct mana_ib_dev *mdev =
 13		container_of(pd->device, struct mana_ib_dev, ib_dev);
 14	struct mana_ib_create_wq ucmd = {};
 15	struct mana_ib_wq *wq;
 16	struct ib_umem *umem;
 17	int err;
 18
 19	if (udata->inlen < sizeof(ucmd))
 20		return ERR_PTR(-EINVAL);
 21
 22	err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
 23	if (err) {
 24		ibdev_dbg(&mdev->ib_dev,
 25			  "Failed to copy from udata for create wq, %d\n", err);
 26		return ERR_PTR(err);
 27	}
 28
 29	wq = kzalloc(sizeof(*wq), GFP_KERNEL);
 30	if (!wq)
 31		return ERR_PTR(-ENOMEM);
 32
 33	ibdev_dbg(&mdev->ib_dev, "ucmd wq_buf_addr 0x%llx\n", ucmd.wq_buf_addr);
 34
 35	umem = ib_umem_get(pd->device, ucmd.wq_buf_addr, ucmd.wq_buf_size,
 36			   IB_ACCESS_LOCAL_WRITE);
 37	if (IS_ERR(umem)) {
 38		err = PTR_ERR(umem);
 39		ibdev_dbg(&mdev->ib_dev,
 40			  "Failed to get umem for create wq, err %d\n", err);
 41		goto err_free_wq;
 42	}
 43
 44	wq->umem = umem;
 45	wq->wqe = init_attr->max_wr;
 46	wq->wq_buf_size = ucmd.wq_buf_size;
 47	wq->rx_object = INVALID_MANA_HANDLE;
 48
 49	err = mana_ib_gd_create_dma_region(mdev, wq->umem, &wq->gdma_region);
 50	if (err) {
 51		ibdev_dbg(&mdev->ib_dev,
 52			  "Failed to create dma region for create wq, %d\n",
 53			  err);
 54		goto err_release_umem;
 55	}
 56
 57	ibdev_dbg(&mdev->ib_dev,
 58		  "mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
 59		  err, wq->gdma_region);
 60
 61	/* WQ ID is returned at wq_create time, doesn't know the value yet */
 62
 63	return &wq->ibwq;
 64
 65err_release_umem:
 66	ib_umem_release(umem);
 67
 68err_free_wq:
 69	kfree(wq);
 70
 71	return ERR_PTR(err);
 72}
 73
 74int mana_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
 75		      u32 wq_attr_mask, struct ib_udata *udata)
 76{
 77	/* modify_wq is not supported by this version of the driver */
 78	return -EOPNOTSUPP;
 79}
 80
 81int mana_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
 82{
 83	struct mana_ib_wq *wq = container_of(ibwq, struct mana_ib_wq, ibwq);
 84	struct ib_device *ib_dev = ibwq->device;
 85	struct mana_ib_dev *mdev;
 86
 87	mdev = container_of(ib_dev, struct mana_ib_dev, ib_dev);
 88
 89	mana_ib_gd_destroy_dma_region(mdev, wq->gdma_region);
 90	ib_umem_release(wq->umem);
 91
 92	kfree(wq);
 93
 94	return 0;
 95}
 96
 97int mana_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_table,
 98				 struct ib_rwq_ind_table_init_attr *init_attr,
 99				 struct ib_udata *udata)
100{
101	/*
102	 * There is no additional data in ind_table to be maintained by this
103	 * driver, do nothing
104	 */
105	return 0;
106}
107
108int mana_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
109{
110	/*
111	 * There is no additional data in ind_table to be maintained by this
112	 * driver, do nothing
113	 */
114	return 0;
115}