/*
 * Broadcom NetXtreme-E User Space RoCE driver
 *
 * Copyright (c) 2015-2017, Broadcom. All rights reserved.  The term
 * Broadcom refers to Broadcom Limited and/or its subsidiaries.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * BSD license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Description: Device detection and initializatoin
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "main.h"
#include "verbs.h"

#define PCI_VENDOR_ID_BROADCOM		0x14E4

#define CNA(v, d) VERBS_PCI_MATCH(PCI_VENDOR_ID_##v, d, NULL)
static const struct verbs_match_ent cna_table[] = {
	CNA(BROADCOM, 0x1605),  /* BCM57454 NPAR */
	CNA(BROADCOM, 0x1606),  /* BCM57454 VF */
	CNA(BROADCOM, 0x1614),  /* BCM57454 */
	CNA(BROADCOM, 0x16C0),  /* BCM57417 NPAR */
	CNA(BROADCOM, 0x16C1),  /* BMC57414 VF */
	CNA(BROADCOM, 0x16CE),  /* BMC57311 */
	CNA(BROADCOM, 0x16CF),  /* BMC57312 */
	CNA(BROADCOM, 0x16D6),  /* BMC57412*/
	CNA(BROADCOM, 0x16D7),  /* BMC57414 */
	CNA(BROADCOM, 0x16D8),  /* BMC57416 Cu */
	CNA(BROADCOM, 0x16D9),  /* BMC57417 Cu */
	CNA(BROADCOM, 0x16DF),  /* BMC57314 */
	CNA(BROADCOM, 0x16E2),  /* BMC57417 */
	CNA(BROADCOM, 0x16E3),  /* BMC57416 */
	CNA(BROADCOM, 0x16E5),  /* BMC57314 VF */
	CNA(BROADCOM, 0x16ED),  /* BCM57414 NPAR */
	CNA(BROADCOM, 0x16EB),  /* BCM57412 NPAR */
	CNA(BROADCOM, 0x16EF),  /* BCM57416 NPAR */
	CNA(BROADCOM, 0x16F0),  /* BCM58730 */
	CNA(BROADCOM, 0x16F1),  /* BCM57452 */
	CNA(BROADCOM, 0xD800),  /* BCM880xx VF */
	CNA(BROADCOM, 0xD802),  /* BCM58802 */
	CNA(BROADCOM, 0xD804),   /* BCM8804 SR */
	{}
};

static const struct verbs_context_ops bnxt_re_cntx_ops = {
	.query_device  = bnxt_re_query_device,
	.query_port    = bnxt_re_query_port,
	.alloc_pd      = bnxt_re_alloc_pd,
	.dealloc_pd    = bnxt_re_free_pd,
	.reg_mr        = bnxt_re_reg_mr,
	.dereg_mr      = bnxt_re_dereg_mr,
	.create_cq     = bnxt_re_create_cq,
	.poll_cq       = bnxt_re_poll_cq,
	.req_notify_cq = bnxt_re_arm_cq,
	.cq_event      = bnxt_re_cq_event,
	.resize_cq     = bnxt_re_resize_cq,
	.destroy_cq    = bnxt_re_destroy_cq,
	.create_srq    = bnxt_re_create_srq,
	.modify_srq    = bnxt_re_modify_srq,
	.query_srq     = bnxt_re_query_srq,
	.destroy_srq   = bnxt_re_destroy_srq,
	.post_srq_recv = bnxt_re_post_srq_recv,
	.create_qp     = bnxt_re_create_qp,
	.query_qp      = bnxt_re_query_qp,
	.modify_qp     = bnxt_re_modify_qp,
	.destroy_qp    = bnxt_re_destroy_qp,
	.post_send     = bnxt_re_post_send,
	.post_recv     = bnxt_re_post_recv,
	.create_ah     = bnxt_re_create_ah,
	.destroy_ah    = bnxt_re_destroy_ah
};

/* Context Init functions */
static struct verbs_context *bnxt_re_alloc_context(struct ibv_device *vdev,
						   int cmd_fd)
{
	struct ibv_get_context cmd;
	struct ubnxt_re_cntx_resp resp;
	struct bnxt_re_dev *dev = to_bnxt_re_dev(vdev);
	struct bnxt_re_context *cntx;

	cntx = verbs_init_and_alloc_context(vdev, cmd_fd, cntx, ibvctx,
					    RDMA_DRIVER_BNXT_RE);
	if (!cntx)
		return NULL;

	memset(&resp, 0, sizeof(resp));
	if (ibv_cmd_get_context(&cntx->ibvctx, &cmd, sizeof(cmd),
				&resp.ibv_resp, sizeof(resp)))
		goto failed;

	cntx->dev_id = resp.dev_id;
	cntx->max_qp = resp.max_qp;
	dev->pg_size = resp.pg_size;
	dev->cqe_size = resp.cqe_sz;
	dev->max_cq_depth = resp.max_cqd;
	pthread_spin_init(&cntx->fqlock, PTHREAD_PROCESS_PRIVATE);
	/* mmap shared page. */
	cntx->shpg = mmap(NULL, dev->pg_size, PROT_READ | PROT_WRITE,
			  MAP_SHARED, cmd_fd, 0);
	if (cntx->shpg == MAP_FAILED) {
		cntx->shpg = NULL;
		goto failed;
	}
	pthread_mutex_init(&cntx->shlock, NULL);

	verbs_set_ops(&cntx->ibvctx, &bnxt_re_cntx_ops);

	return &cntx->ibvctx;

failed:
	verbs_uninit_context(&cntx->ibvctx);
	free(cntx);
	return NULL;
}

static void bnxt_re_free_context(struct ibv_context *ibvctx)
{
	struct bnxt_re_context *cntx = to_bnxt_re_context(ibvctx);
	struct bnxt_re_dev *dev = to_bnxt_re_dev(ibvctx->device);

	/* Unmap if anything device specific was mapped in init_context. */
	pthread_mutex_destroy(&cntx->shlock);
	if (cntx->shpg)
		munmap(cntx->shpg, dev->pg_size);
	pthread_spin_destroy(&cntx->fqlock);

	/* Un-map DPI only for the first PD that was
	 * allocated in this context.
	 */
	if (cntx->udpi.dbpage && cntx->udpi.dbpage != MAP_FAILED) {
		pthread_spin_destroy(&cntx->udpi.db_lock);
		munmap(cntx->udpi.dbpage, dev->pg_size);
		cntx->udpi.dbpage = NULL;
	}

	verbs_uninit_context(&cntx->ibvctx);
	free(cntx);
}

static struct verbs_device *
bnxt_re_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
{
	struct bnxt_re_dev *dev;

	dev = calloc(1, sizeof(*dev));
	if (!dev)
		return NULL;

	return &dev->vdev;
}

static const struct verbs_device_ops bnxt_re_dev_ops = {
	.name = "bnxt_re",
	.match_min_abi_version = BNXT_RE_ABI_VERSION,
	.match_max_abi_version = BNXT_RE_ABI_VERSION,
	.match_table = cna_table,
	.alloc_device = bnxt_re_device_alloc,
	.alloc_context = bnxt_re_alloc_context,
	.free_context = bnxt_re_free_context,
};
PROVIDER_DRIVER(bnxt_re_dev_ops);
