/*
 * Broadcom NetXtreme-E RoCE driver.
 *
 * Copyright (c) 2016 - 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: Statistics
 *
 */

#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/prefetch.h>
#include <linux/delay.h>

#include <rdma/ib_addr.h>

#include "bnxt_ulp.h"
#include "roce_hsi.h"
#include "qplib_res.h"
#include "qplib_sp.h"
#include "qplib_fp.h"
#include "qplib_rcfw.h"
#include "bnxt_re.h"
#include "hw_counters.h"

static const struct rdma_stat_desc bnxt_re_stat_descs[] = {
	[BNXT_RE_ACTIVE_PD].name		=  "active_pds",
	[BNXT_RE_ACTIVE_AH].name		=  "active_ahs",
	[BNXT_RE_ACTIVE_QP].name		=  "active_qps",
	[BNXT_RE_ACTIVE_RC_QP].name             =  "active_rc_qps",
	[BNXT_RE_ACTIVE_UD_QP].name             =  "active_ud_qps",
	[BNXT_RE_ACTIVE_SRQ].name		=  "active_srqs",
	[BNXT_RE_ACTIVE_CQ].name		=  "active_cqs",
	[BNXT_RE_ACTIVE_MR].name		=  "active_mrs",
	[BNXT_RE_ACTIVE_MW].name		=  "active_mws",
	[BNXT_RE_WATERMARK_PD].name             =  "watermark_pds",
	[BNXT_RE_WATERMARK_AH].name             =  "watermark_ahs",
	[BNXT_RE_WATERMARK_QP].name             =  "watermark_qps",
	[BNXT_RE_WATERMARK_RC_QP].name          =  "watermark_rc_qps",
	[BNXT_RE_WATERMARK_UD_QP].name          =  "watermark_ud_qps",
	[BNXT_RE_WATERMARK_SRQ].name            =  "watermark_srqs",
	[BNXT_RE_WATERMARK_CQ].name             =  "watermark_cqs",
	[BNXT_RE_WATERMARK_MR].name             =  "watermark_mrs",
	[BNXT_RE_WATERMARK_MW].name             =  "watermark_mws",
	[BNXT_RE_RESIZE_CQ_CNT].name            =  "resize_cq_cnt",
	[BNXT_RE_RX_PKTS].name		=  "rx_pkts",
	[BNXT_RE_RX_BYTES].name		=  "rx_bytes",
	[BNXT_RE_TX_PKTS].name		=  "tx_pkts",
	[BNXT_RE_TX_BYTES].name		=  "tx_bytes",
	[BNXT_RE_RECOVERABLE_ERRORS].name	=  "recoverable_errors",
	[BNXT_RE_TX_ERRORS].name                =  "tx_roce_errors",
	[BNXT_RE_TX_DISCARDS].name              =  "tx_roce_discards",
	[BNXT_RE_RX_ERRORS].name		=  "rx_roce_errors",
	[BNXT_RE_RX_DISCARDS].name		=  "rx_roce_discards",
	[BNXT_RE_TO_RETRANSMITS].name        = "to_retransmits",
	[BNXT_RE_SEQ_ERR_NAKS_RCVD].name     = "seq_err_naks_rcvd",
	[BNXT_RE_MAX_RETRY_EXCEEDED].name    = "max_retry_exceeded",
	[BNXT_RE_RNR_NAKS_RCVD].name         = "rnr_naks_rcvd",
	[BNXT_RE_MISSING_RESP].name          = "missing_resp",
	[BNXT_RE_UNRECOVERABLE_ERR].name     = "unrecoverable_err",
	[BNXT_RE_BAD_RESP_ERR].name          = "bad_resp_err",
	[BNXT_RE_LOCAL_QP_OP_ERR].name       = "local_qp_op_err",
	[BNXT_RE_LOCAL_PROTECTION_ERR].name  = "local_protection_err",
	[BNXT_RE_MEM_MGMT_OP_ERR].name       = "mem_mgmt_op_err",
	[BNXT_RE_REMOTE_INVALID_REQ_ERR].name = "remote_invalid_req_err",
	[BNXT_RE_REMOTE_ACCESS_ERR].name     = "remote_access_err",
	[BNXT_RE_REMOTE_OP_ERR].name         = "remote_op_err",
	[BNXT_RE_DUP_REQ].name               = "dup_req",
	[BNXT_RE_RES_EXCEED_MAX].name        = "res_exceed_max",
	[BNXT_RE_RES_LENGTH_MISMATCH].name   = "res_length_mismatch",
	[BNXT_RE_RES_EXCEEDS_WQE].name       = "res_exceeds_wqe",
	[BNXT_RE_RES_OPCODE_ERR].name        = "res_opcode_err",
	[BNXT_RE_RES_RX_INVALID_RKEY].name   = "res_rx_invalid_rkey",
	[BNXT_RE_RES_RX_DOMAIN_ERR].name     = "res_rx_domain_err",
	[BNXT_RE_RES_RX_NO_PERM].name        = "res_rx_no_perm",
	[BNXT_RE_RES_RX_RANGE_ERR].name      = "res_rx_range_err",
	[BNXT_RE_RES_TX_INVALID_RKEY].name   = "res_tx_invalid_rkey",
	[BNXT_RE_RES_TX_DOMAIN_ERR].name     = "res_tx_domain_err",
	[BNXT_RE_RES_TX_NO_PERM].name        = "res_tx_no_perm",
	[BNXT_RE_RES_TX_RANGE_ERR].name      = "res_tx_range_err",
	[BNXT_RE_RES_IRRQ_OFLOW].name        = "res_irrq_oflow",
	[BNXT_RE_RES_UNSUP_OPCODE].name      = "res_unsup_opcode",
	[BNXT_RE_RES_UNALIGNED_ATOMIC].name  = "res_unaligned_atomic",
	[BNXT_RE_RES_REM_INV_ERR].name       = "res_rem_inv_err",
	[BNXT_RE_RES_MEM_ERROR].name         = "res_mem_err",
	[BNXT_RE_RES_SRQ_ERR].name           = "res_srq_err",
	[BNXT_RE_RES_CMP_ERR].name           = "res_cmp_err",
	[BNXT_RE_RES_INVALID_DUP_RKEY].name  = "res_invalid_dup_rkey",
	[BNXT_RE_RES_WQE_FORMAT_ERR].name    = "res_wqe_format_err",
	[BNXT_RE_RES_CQ_LOAD_ERR].name       = "res_cq_load_err",
	[BNXT_RE_RES_SRQ_LOAD_ERR].name      = "res_srq_load_err",
	[BNXT_RE_RES_TX_PCI_ERR].name        = "res_tx_pci_err",
	[BNXT_RE_RES_RX_PCI_ERR].name        = "res_rx_pci_err",
	[BNXT_RE_OUT_OF_SEQ_ERR].name        = "oos_drop_count",
	[BNXT_RE_TX_ATOMIC_REQ].name	     = "tx_atomic_req",
	[BNXT_RE_TX_READ_REQ].name	     = "tx_read_req",
	[BNXT_RE_TX_READ_RES].name	     = "tx_read_resp",
	[BNXT_RE_TX_WRITE_REQ].name	     = "tx_write_req",
	[BNXT_RE_TX_SEND_REQ].name	     = "tx_send_req",
	[BNXT_RE_TX_ROCE_PKTS].name          = "tx_roce_only_pkts",
	[BNXT_RE_TX_ROCE_BYTES].name         = "tx_roce_only_bytes",
	[BNXT_RE_RX_ATOMIC_REQ].name	     = "rx_atomic_req",
	[BNXT_RE_RX_READ_REQ].name	     = "rx_read_req",
	[BNXT_RE_RX_READ_RESP].name	     = "rx_read_resp",
	[BNXT_RE_RX_WRITE_REQ].name	     = "rx_write_req",
	[BNXT_RE_RX_SEND_REQ].name	     = "rx_send_req",
	[BNXT_RE_RX_ROCE_PKTS].name          = "rx_roce_only_pkts",
	[BNXT_RE_RX_ROCE_BYTES].name         = "rx_roce_only_bytes",
	[BNXT_RE_RX_ROCE_GOOD_PKTS].name     = "rx_roce_good_pkts",
	[BNXT_RE_RX_ROCE_GOOD_BYTES].name    = "rx_roce_good_bytes",
	[BNXT_RE_OOB].name		     = "rx_out_of_buffer",
	[BNXT_RE_TX_CNP].name                = "tx_cnp_pkts",
	[BNXT_RE_RX_CNP].name                = "rx_cnp_pkts",
	[BNXT_RE_RX_ECN].name                = "rx_ecn_marked_pkts",
	[BNXT_RE_PACING_RESCHED].name        = "pacing_reschedule",
	[BNXT_RE_PACING_CMPL].name           = "pacing_complete",
	[BNXT_RE_PACING_ALERT].name          = "pacing_alerts",
	[BNXT_RE_DB_FIFO_REG].name           = "db_fifo_register",
};

static void bnxt_re_copy_ext_stats(struct bnxt_re_dev *rdev,
				   struct rdma_hw_stats *stats,
				   struct bnxt_qplib_ext_stat *s)
{
	stats->value[BNXT_RE_TX_ATOMIC_REQ] = s->tx_atomic_req;
	stats->value[BNXT_RE_TX_READ_REQ]   = s->tx_read_req;
	stats->value[BNXT_RE_TX_READ_RES]   = s->tx_read_res;
	stats->value[BNXT_RE_TX_WRITE_REQ]  = s->tx_write_req;
	stats->value[BNXT_RE_TX_SEND_REQ]   = s->tx_send_req;
	stats->value[BNXT_RE_TX_ROCE_PKTS]  = s->tx_roce_pkts;
	stats->value[BNXT_RE_TX_ROCE_BYTES] = s->tx_roce_bytes;
	stats->value[BNXT_RE_RX_ATOMIC_REQ] = s->rx_atomic_req;
	stats->value[BNXT_RE_RX_READ_REQ]   = s->rx_read_req;
	stats->value[BNXT_RE_RX_READ_RESP]  = s->rx_read_res;
	stats->value[BNXT_RE_RX_WRITE_REQ]  = s->rx_write_req;
	stats->value[BNXT_RE_RX_SEND_REQ]   = s->rx_send_req;
	stats->value[BNXT_RE_RX_ROCE_PKTS]  = s->rx_roce_pkts;
	stats->value[BNXT_RE_RX_ROCE_BYTES] = s->rx_roce_bytes;
	stats->value[BNXT_RE_RX_ROCE_GOOD_PKTS] = s->rx_roce_good_pkts;
	stats->value[BNXT_RE_RX_ROCE_GOOD_BYTES] = s->rx_roce_good_bytes;
	stats->value[BNXT_RE_OOB] = s->rx_out_of_buffer;
	stats->value[BNXT_RE_TX_CNP] = s->tx_cnp;
	stats->value[BNXT_RE_RX_CNP] = s->rx_cnp;
	stats->value[BNXT_RE_RX_ECN] = s->rx_ecn_marked;
	stats->value[BNXT_RE_OUT_OF_SEQ_ERR] = s->rx_out_of_sequence;
}

static int bnxt_re_get_ext_stat(struct bnxt_re_dev *rdev,
				struct rdma_hw_stats *stats)
{
	struct bnxt_qplib_ext_stat *estat = &rdev->stats.rstat.ext_stat;
	u32 fid;
	int rc;

	fid = PCI_FUNC(rdev->en_dev->pdev->devfn);
	rc = bnxt_qplib_qext_stat(&rdev->rcfw, fid, estat);
	if (rc)
		goto done;
	bnxt_re_copy_ext_stats(rdev, stats, estat);

done:
	return rc;
}

static void bnxt_re_copy_err_stats(struct bnxt_re_dev *rdev,
				   struct rdma_hw_stats *stats,
				   struct bnxt_qplib_roce_stats *err_s)
{
	stats->value[BNXT_RE_TO_RETRANSMITS] =
				err_s->to_retransmits;
	stats->value[BNXT_RE_SEQ_ERR_NAKS_RCVD] =
				err_s->seq_err_naks_rcvd;
	stats->value[BNXT_RE_MAX_RETRY_EXCEEDED] =
				err_s->max_retry_exceeded;
	stats->value[BNXT_RE_RNR_NAKS_RCVD] =
				err_s->rnr_naks_rcvd;
	stats->value[BNXT_RE_MISSING_RESP] =
				err_s->missing_resp;
	stats->value[BNXT_RE_UNRECOVERABLE_ERR] =
				err_s->unrecoverable_err;
	stats->value[BNXT_RE_BAD_RESP_ERR] =
				err_s->bad_resp_err;
	stats->value[BNXT_RE_LOCAL_QP_OP_ERR]	=
			err_s->local_qp_op_err;
	stats->value[BNXT_RE_LOCAL_PROTECTION_ERR] =
			err_s->local_protection_err;
	stats->value[BNXT_RE_MEM_MGMT_OP_ERR] =
			err_s->mem_mgmt_op_err;
	stats->value[BNXT_RE_REMOTE_INVALID_REQ_ERR] =
			err_s->remote_invalid_req_err;
	stats->value[BNXT_RE_REMOTE_ACCESS_ERR] =
			err_s->remote_access_err;
	stats->value[BNXT_RE_REMOTE_OP_ERR] =
			err_s->remote_op_err;
	stats->value[BNXT_RE_DUP_REQ] =
			err_s->dup_req;
	stats->value[BNXT_RE_RES_EXCEED_MAX] =
			err_s->res_exceed_max;
	stats->value[BNXT_RE_RES_LENGTH_MISMATCH] =
			err_s->res_length_mismatch;
	stats->value[BNXT_RE_RES_EXCEEDS_WQE] =
			err_s->res_exceeds_wqe;
	stats->value[BNXT_RE_RES_OPCODE_ERR] =
			err_s->res_opcode_err;
	stats->value[BNXT_RE_RES_RX_INVALID_RKEY] =
			err_s->res_rx_invalid_rkey;
	stats->value[BNXT_RE_RES_RX_DOMAIN_ERR] =
			err_s->res_rx_domain_err;
	stats->value[BNXT_RE_RES_RX_NO_PERM] =
			err_s->res_rx_no_perm;
	stats->value[BNXT_RE_RES_RX_RANGE_ERR]  =
			err_s->res_rx_range_err;
	stats->value[BNXT_RE_RES_TX_INVALID_RKEY] =
			err_s->res_tx_invalid_rkey;
	stats->value[BNXT_RE_RES_TX_DOMAIN_ERR] =
			err_s->res_tx_domain_err;
	stats->value[BNXT_RE_RES_TX_NO_PERM] =
			err_s->res_tx_no_perm;
	stats->value[BNXT_RE_RES_TX_RANGE_ERR]  =
			err_s->res_tx_range_err;
	stats->value[BNXT_RE_RES_IRRQ_OFLOW] =
			err_s->res_irrq_oflow;
	stats->value[BNXT_RE_RES_UNSUP_OPCODE]  =
			err_s->res_unsup_opcode;
	stats->value[BNXT_RE_RES_UNALIGNED_ATOMIC] =
			err_s->res_unaligned_atomic;
	stats->value[BNXT_RE_RES_REM_INV_ERR]   =
			err_s->res_rem_inv_err;
	stats->value[BNXT_RE_RES_MEM_ERROR] =
			err_s->res_mem_error;
	stats->value[BNXT_RE_RES_SRQ_ERR] =
			err_s->res_srq_err;
	stats->value[BNXT_RE_RES_CMP_ERR] =
			err_s->res_cmp_err;
	stats->value[BNXT_RE_RES_INVALID_DUP_RKEY] =
			err_s->res_invalid_dup_rkey;
	stats->value[BNXT_RE_RES_WQE_FORMAT_ERR] =
			err_s->res_wqe_format_err;
	stats->value[BNXT_RE_RES_CQ_LOAD_ERR]   =
			err_s->res_cq_load_err;
	stats->value[BNXT_RE_RES_SRQ_LOAD_ERR]  =
			err_s->res_srq_load_err;
	stats->value[BNXT_RE_RES_TX_PCI_ERR]    =
			err_s->res_tx_pci_err;
	stats->value[BNXT_RE_RES_RX_PCI_ERR]    =
			err_s->res_rx_pci_err;
	stats->value[BNXT_RE_OUT_OF_SEQ_ERR]    =
			err_s->res_oos_drop_count;
}

static void bnxt_re_copy_db_pacing_stats(struct bnxt_re_dev *rdev,
					 struct rdma_hw_stats *stats)
{
	struct bnxt_re_db_pacing_stats *pacing_s =  &rdev->stats.pacing;

	stats->value[BNXT_RE_PACING_RESCHED] = pacing_s->resched;
	stats->value[BNXT_RE_PACING_CMPL] = pacing_s->complete;
	stats->value[BNXT_RE_PACING_ALERT] = pacing_s->alerts;
	stats->value[BNXT_RE_DB_FIFO_REG] =
		readl(rdev->en_dev->bar0 + rdev->pacing.dbr_db_fifo_reg_off);
}

int bnxt_re_ib_get_hw_stats(struct ib_device *ibdev,
			    struct rdma_hw_stats *stats,
			    u32 port, int index)
{
	struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
	struct bnxt_re_res_cntrs *res_s = &rdev->stats.res;
	struct bnxt_qplib_roce_stats *err_s = NULL;
	struct ctx_hw_stats *hw_stats = NULL;
	int rc  = 0;

	hw_stats = rdev->qplib_ctx.stats.dma;
	if (!port || !stats)
		return -EINVAL;

	stats->value[BNXT_RE_ACTIVE_QP] = atomic_read(&res_s->qp_count);
	stats->value[BNXT_RE_ACTIVE_RC_QP] = atomic_read(&res_s->rc_qp_count);
	stats->value[BNXT_RE_ACTIVE_UD_QP] = atomic_read(&res_s->ud_qp_count);
	stats->value[BNXT_RE_ACTIVE_SRQ] = atomic_read(&res_s->srq_count);
	stats->value[BNXT_RE_ACTIVE_CQ] = atomic_read(&res_s->cq_count);
	stats->value[BNXT_RE_ACTIVE_MR] = atomic_read(&res_s->mr_count);
	stats->value[BNXT_RE_ACTIVE_MW] = atomic_read(&res_s->mw_count);
	stats->value[BNXT_RE_ACTIVE_PD] = atomic_read(&res_s->pd_count);
	stats->value[BNXT_RE_ACTIVE_AH] = atomic_read(&res_s->ah_count);
	stats->value[BNXT_RE_WATERMARK_QP] = res_s->qp_watermark;
	stats->value[BNXT_RE_WATERMARK_RC_QP] = res_s->rc_qp_watermark;
	stats->value[BNXT_RE_WATERMARK_UD_QP] = res_s->ud_qp_watermark;
	stats->value[BNXT_RE_WATERMARK_SRQ] = res_s->srq_watermark;
	stats->value[BNXT_RE_WATERMARK_CQ] = res_s->cq_watermark;
	stats->value[BNXT_RE_WATERMARK_MR] = res_s->mr_watermark;
	stats->value[BNXT_RE_WATERMARK_MW] = res_s->mw_watermark;
	stats->value[BNXT_RE_WATERMARK_PD] = res_s->pd_watermark;
	stats->value[BNXT_RE_WATERMARK_AH] = res_s->ah_watermark;
	stats->value[BNXT_RE_RESIZE_CQ_CNT] = atomic_read(&res_s->resize_count);

	if (hw_stats) {
		stats->value[BNXT_RE_RECOVERABLE_ERRORS] =
			le64_to_cpu(hw_stats->tx_bcast_pkts);
		stats->value[BNXT_RE_TX_DISCARDS] =
			le64_to_cpu(hw_stats->tx_discard_pkts);
		stats->value[BNXT_RE_TX_ERRORS] =
			le64_to_cpu(hw_stats->tx_error_pkts);
		stats->value[BNXT_RE_RX_ERRORS] =
			le64_to_cpu(hw_stats->rx_error_pkts);
		stats->value[BNXT_RE_RX_DISCARDS] =
			le64_to_cpu(hw_stats->rx_discard_pkts);
		stats->value[BNXT_RE_RX_PKTS] =
			le64_to_cpu(hw_stats->rx_ucast_pkts);
		stats->value[BNXT_RE_RX_BYTES] =
			le64_to_cpu(hw_stats->rx_ucast_bytes);
		stats->value[BNXT_RE_TX_PKTS] =
			le64_to_cpu(hw_stats->tx_ucast_pkts);
		stats->value[BNXT_RE_TX_BYTES] =
			le64_to_cpu(hw_stats->tx_ucast_bytes);
	}
	err_s = &rdev->stats.rstat.errs;
	if (test_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS, &rdev->flags)) {
		rc = bnxt_qplib_get_roce_stats(&rdev->rcfw, err_s);
		if (rc) {
			clear_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS,
				  &rdev->flags);
			goto done;
		}
		bnxt_re_copy_err_stats(rdev, stats, err_s);
		if (_is_ext_stats_supported(rdev->dev_attr.dev_cap_flags) &&
		    !rdev->is_virtfn) {
			rc = bnxt_re_get_ext_stat(rdev, stats);
			if (rc) {
				clear_bit(BNXT_RE_FLAG_ISSUE_ROCE_STATS,
					  &rdev->flags);
				goto done;
			}
		}
		if (rdev->pacing.dbr_pacing && bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
			bnxt_re_copy_db_pacing_stats(rdev, stats);
	}

done:
	return bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx) ?
		BNXT_RE_NUM_EXT_COUNTERS : BNXT_RE_NUM_STD_COUNTERS;
}

struct rdma_hw_stats *bnxt_re_ib_alloc_hw_port_stats(struct ib_device *ibdev,
						     u32 port_num)
{
	struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
	int num_counters = 0;

	if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
		num_counters = BNXT_RE_NUM_EXT_COUNTERS;
	else
		num_counters = BNXT_RE_NUM_STD_COUNTERS;

	return rdma_alloc_hw_stats_struct(bnxt_re_stat_descs, num_counters,
					  RDMA_HW_STATS_DEFAULT_LIFESPAN);
}