drivers/infiniband/hw/mana/wq.c

   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
   8 struct 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         int err;
  17
  18         if (udata->inlen < sizeof(ucmd))
  19                 return ERR_PTR(-EINVAL);
  20
  21         err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
  22         if (err) {
  23                 ibdev_dbg(&mdev->ib_dev,
  24                           "Failed to copy from udata for create wq, %d\n", err);
  25                 return ERR_PTR(err);
  26         }
  27
  28         wq = kzalloc(sizeof(*wq), GFP_KERNEL);
  29         if (!wq)
  30                 return ERR_PTR(-ENOMEM);
  31
  32         ibdev_dbg(&mdev->ib_dev, "ucmd wq_buf_addr 0x%llx\n", ucmd.wq_buf_addr);
  33
  34         err = mana_ib_create_queue(mdev, ucmd.wq_buf_addr, ucmd.wq_buf_size, &wq->queue);
  35         if (err) {
  36                 ibdev_dbg(&mdev->ib_dev,
  37                           "Failed to create queue for create wq, %d\n", err);
  38                 goto err_free_wq;
  39         }
  40
  41         wq->wqe = init_attr->max_wr;
  42         wq->wq_buf_size = ucmd.wq_buf_size;
  43         wq->rx_object = INVALID_MANA_HANDLE;
  44         return &wq->ibwq;
  45
  46 err_free_wq:
  47         kfree(wq);
  48
  49         return ERR_PTR(err);
  50 }
  51
  52 int mana_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
  53                       u32 wq_attr_mask, struct ib_udata *udata)
  54 {
  55         /* modify_wq is not supported by this version of the driver */
  56         return -EOPNOTSUPP;
  57 }
  58
  59 int mana_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
  60 {
  61         struct mana_ib_wq *wq = container_of(ibwq, struct mana_ib_wq, ibwq);
  62         struct ib_device *ib_dev = ibwq->device;
  63         struct mana_ib_dev *mdev;
  64
  65         mdev = container_of(ib_dev, struct mana_ib_dev, ib_dev);
  66
  67         mana_ib_destroy_queue(mdev, &wq->queue);
  68
  69         kfree(wq);
  70
  71         return 0;
  72 }
  73
  74 int mana_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_table,
  75                                  struct ib_rwq_ind_table_init_attr *init_attr,
  76                                  struct ib_udata *udata)
  77 {
  78         /*
  79          * There is no additional data in ind_table to be maintained by this
  80          * driver, do nothing
  81          */
  82         return 0;
  83 }
  84
  85 int mana_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
  86 {
  87         /*
  88          * There is no additional data in ind_table to be maintained by this
  89          * driver, do nothing
  90          */
  91         return 0;
  92 }