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Diffstat (limited to 'drivers/infiniband/hw/mana/cq.c')
-rw-r--r--drivers/infiniband/hw/mana/cq.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mana/cq.c b/drivers/infiniband/hw/mana/cq.c
new file mode 100644
index 0000000000..d141cab8a1
--- /dev/null
+++ b/drivers/infiniband/hw/mana/cq.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
+ */
+
+#include "mana_ib.h"
+
+int mana_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+ struct ib_udata *udata)
+{
+ struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
+ struct ib_device *ibdev = ibcq->device;
+ struct mana_ib_create_cq ucmd = {};
+ struct mana_ib_dev *mdev;
+ int err;
+
+ mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
+
+ if (udata->inlen < sizeof(ucmd))
+ return -EINVAL;
+
+ err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(ibdev,
+ "Failed to copy from udata for create cq, %d\n", err);
+ return err;
+ }
+
+ if (attr->cqe > MAX_SEND_BUFFERS_PER_QUEUE) {
+ ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);
+ return -EINVAL;
+ }
+
+ cq->cqe = attr->cqe;
+ cq->umem = ib_umem_get(ibdev, ucmd.buf_addr, cq->cqe * COMP_ENTRY_SIZE,
+ IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(cq->umem)) {
+ err = PTR_ERR(cq->umem);
+ ibdev_dbg(ibdev, "Failed to get umem for create cq, err %d\n",
+ err);
+ return err;
+ }
+
+ err = mana_ib_gd_create_dma_region(mdev, cq->umem, &cq->gdma_region);
+ if (err) {
+ ibdev_dbg(ibdev,
+ "Failed to create dma region for create cq, %d\n",
+ err);
+ goto err_release_umem;
+ }
+
+ ibdev_dbg(ibdev,
+ "mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
+ err, cq->gdma_region);
+
+ /*
+ * The CQ ID is not known at this time. The ID is generated at create_qp
+ */
+
+ return 0;
+
+err_release_umem:
+ ib_umem_release(cq->umem);
+ return err;
+}
+
+int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+{
+ struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
+ struct ib_device *ibdev = ibcq->device;
+ struct mana_ib_dev *mdev;
+
+ mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
+
+ mana_ib_gd_destroy_dma_region(mdev, cq->gdma_region);
+ ib_umem_release(cq->umem);
+
+ return 0;
+}