0266a17763
Add a RDMA VF driver for Microsoft Azure Network Adapter (MANA). Co-developed-by: Ajay Sharma <sharmaajay@microsoft.com> Signed-off-by: Ajay Sharma <sharmaajay@microsoft.com> Reviewed-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: Long Li <longli@microsoft.com> Link: https://lore.kernel.org/r/1667502990-2559-13-git-send-email-longli@linuxonhyperv.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2022, Microsoft Corporation. All rights reserved.
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*/
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#include "mana_ib.h"
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struct ib_wq *mana_ib_create_wq(struct ib_pd *pd,
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struct ib_wq_init_attr *init_attr,
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struct ib_udata *udata)
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{
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struct mana_ib_dev *mdev =
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container_of(pd->device, struct mana_ib_dev, ib_dev);
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struct mana_ib_create_wq ucmd = {};
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struct mana_ib_wq *wq;
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struct ib_umem *umem;
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int err;
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if (udata->inlen < sizeof(ucmd))
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return ERR_PTR(-EINVAL);
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err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
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if (err) {
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ibdev_dbg(&mdev->ib_dev,
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"Failed to copy from udata for create wq, %d\n", err);
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return ERR_PTR(err);
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}
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wq = kzalloc(sizeof(*wq), GFP_KERNEL);
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if (!wq)
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return ERR_PTR(-ENOMEM);
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ibdev_dbg(&mdev->ib_dev, "ucmd wq_buf_addr 0x%llx\n", ucmd.wq_buf_addr);
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umem = ib_umem_get(pd->device, ucmd.wq_buf_addr, ucmd.wq_buf_size,
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IB_ACCESS_LOCAL_WRITE);
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if (IS_ERR(umem)) {
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err = PTR_ERR(umem);
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ibdev_dbg(&mdev->ib_dev,
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"Failed to get umem for create wq, err %d\n", err);
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goto err_free_wq;
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}
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wq->umem = umem;
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wq->wqe = init_attr->max_wr;
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wq->wq_buf_size = ucmd.wq_buf_size;
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wq->rx_object = INVALID_MANA_HANDLE;
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err = mana_ib_gd_create_dma_region(mdev, wq->umem, &wq->gdma_region);
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if (err) {
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ibdev_dbg(&mdev->ib_dev,
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"Failed to create dma region for create wq, %d\n",
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err);
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goto err_release_umem;
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}
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ibdev_dbg(&mdev->ib_dev,
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"mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
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err, wq->gdma_region);
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/* WQ ID is returned at wq_create time, doesn't know the value yet */
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return &wq->ibwq;
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err_release_umem:
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ib_umem_release(umem);
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err_free_wq:
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kfree(wq);
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return ERR_PTR(err);
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}
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int mana_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
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u32 wq_attr_mask, struct ib_udata *udata)
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{
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/* modify_wq is not supported by this version of the driver */
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return -EOPNOTSUPP;
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}
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int mana_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
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{
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struct mana_ib_wq *wq = container_of(ibwq, struct mana_ib_wq, ibwq);
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struct ib_device *ib_dev = ibwq->device;
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struct mana_ib_dev *mdev;
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mdev = container_of(ib_dev, struct mana_ib_dev, ib_dev);
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mana_ib_gd_destroy_dma_region(mdev, wq->gdma_region);
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ib_umem_release(wq->umem);
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kfree(wq);
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return 0;
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}
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int mana_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_table,
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struct ib_rwq_ind_table_init_attr *init_attr,
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struct ib_udata *udata)
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{
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/*
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* There is no additional data in ind_table to be maintained by this
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* driver, do nothing
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*/
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return 0;
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}
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int mana_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
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{
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/*
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* There is no additional data in ind_table to be maintained by this
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* driver, do nothing
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*/
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return 0;
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}
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