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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved.4 */5 6#include "mana_ib.h"7 8int mana_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,9		      struct uverbs_attr_bundle *attrs)10{11	struct ib_udata *udata = &attrs->driver_udata;12	struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);13	struct mana_ib_create_cq_resp resp = {};14	struct mana_ib_ucontext *mana_ucontext;15	struct ib_device *ibdev = ibcq->device;16	struct mana_ib_create_cq ucmd = {};17	struct mana_ib_dev *mdev;18	bool is_rnic_cq;19	u32 doorbell;20	int err;21 22	mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);23 24	cq->comp_vector = attr->comp_vector % ibdev->num_comp_vectors;25	cq->cq_handle = INVALID_MANA_HANDLE;26 27	if (udata->inlen < offsetof(struct mana_ib_create_cq, flags))28		return -EINVAL;29 30	err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));31	if (err) {32		ibdev_dbg(ibdev,33			  "Failed to copy from udata for create cq, %d\n", err);34		return err;35	}36 37	is_rnic_cq = !!(ucmd.flags & MANA_IB_CREATE_RNIC_CQ);38 39	if (!is_rnic_cq && attr->cqe > mdev->adapter_caps.max_qp_wr) {40		ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);41		return -EINVAL;42	}43 44	cq->cqe = attr->cqe;45	err = mana_ib_create_queue(mdev, ucmd.buf_addr, cq->cqe * COMP_ENTRY_SIZE, &cq->queue);46	if (err) {47		ibdev_dbg(ibdev, "Failed to create queue for create cq, %d\n", err);48		return err;49	}50 51	mana_ucontext = rdma_udata_to_drv_context(udata, struct mana_ib_ucontext,52						  ibucontext);53	doorbell = mana_ucontext->doorbell;54 55	if (is_rnic_cq) {56		err = mana_ib_gd_create_cq(mdev, cq, doorbell);57		if (err) {58			ibdev_dbg(ibdev, "Failed to create RNIC cq, %d\n", err);59			goto err_destroy_queue;60		}61 62		err = mana_ib_install_cq_cb(mdev, cq);63		if (err) {64			ibdev_dbg(ibdev, "Failed to install cq callback, %d\n", err);65			goto err_destroy_rnic_cq;66		}67	}68 69	resp.cqid = cq->queue.id;70	err = ib_copy_to_udata(udata, &resp, min(sizeof(resp), udata->outlen));71	if (err) {72		ibdev_dbg(&mdev->ib_dev, "Failed to copy to udata, %d\n", err);73		goto err_remove_cq_cb;74	}75 76	return 0;77 78err_remove_cq_cb:79	mana_ib_remove_cq_cb(mdev, cq);80err_destroy_rnic_cq:81	mana_ib_gd_destroy_cq(mdev, cq);82err_destroy_queue:83	mana_ib_destroy_queue(mdev, &cq->queue);84 85	return err;86}87 88int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)89{90	struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);91	struct ib_device *ibdev = ibcq->device;92	struct mana_ib_dev *mdev;93 94	mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);95 96	mana_ib_remove_cq_cb(mdev, cq);97 98	/* Ignore return code as there is not much we can do about it.99	 * The error message is printed inside.100	 */101	mana_ib_gd_destroy_cq(mdev, cq);102 103	mana_ib_destroy_queue(mdev, &cq->queue);104 105	return 0;106}107 108static void mana_ib_cq_handler(void *ctx, struct gdma_queue *gdma_cq)109{110	struct mana_ib_cq *cq = ctx;111 112	if (cq->ibcq.comp_handler)113		cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);114}115 116int mana_ib_install_cq_cb(struct mana_ib_dev *mdev, struct mana_ib_cq *cq)117{118	struct gdma_context *gc = mdev_to_gc(mdev);119	struct gdma_queue *gdma_cq;120 121	if (cq->queue.id >= gc->max_num_cqs)122		return -EINVAL;123	/* Create CQ table entry */124	WARN_ON(gc->cq_table[cq->queue.id]);125	gdma_cq = kzalloc(sizeof(*gdma_cq), GFP_KERNEL);126	if (!gdma_cq)127		return -ENOMEM;128 129	gdma_cq->cq.context = cq;130	gdma_cq->type = GDMA_CQ;131	gdma_cq->cq.callback = mana_ib_cq_handler;132	gdma_cq->id = cq->queue.id;133	gc->cq_table[cq->queue.id] = gdma_cq;134	return 0;135}136 137void mana_ib_remove_cq_cb(struct mana_ib_dev *mdev, struct mana_ib_cq *cq)138{139	struct gdma_context *gc = mdev_to_gc(mdev);140 141	if (cq->queue.id >= gc->max_num_cqs || cq->queue.id == INVALID_QUEUE_ID)142		return;143 144	kfree(gc->cq_table[cq->queue.id]);145	gc->cq_table[cq->queue.id] = NULL;146}147