ceph/src/seastar/dpdk/drivers/net/ark/ark_rqp.h

   1 /*-
   2  * BSD LICENSE
   3  *
   4  * Copyright (c) 2015-2017 Atomic Rules LLC
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * * Redistributions of source code must retain the above copyright
  12  * notice, this list of conditions and the following disclaimer.
  13  * * Redistributions in binary form must reproduce the above copyright
  14  * notice, this list of conditions and the following disclaimer in
  15  * the documentation and/or other materials provided with the
  16  * distribution.
  17  * * Neither the name of copyright holder nor the names of its
  18  * contributors may be used to endorse or promote products derived
  19  * from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _ARK_RQP_H_
  35 #define _ARK_RQP_H_
  36
  37 #include <stdint.h>
  38
  39 #include <rte_memory.h>
  40
  41 /* The RQP or ReQuest Pacer is an internal Arkville hardware module
  42  * which limits the PCIE data flow to insure correct operation for the
  43  * particular hardware PCIE endpoint.
  44  * This module is *not* intended for end-user manipulation, hence
  45  * there is minimal documentation.
  46  */
  47
  48 /*
  49  * RQ Pacing core hardware structure
  50  * This is an overlay structures to a memory mapped FPGA device.  These
  51  * structs will never be instantiated in ram memory
  52  */
  53 struct ark_rqpace_t {
  54         volatile uint32_t ctrl;
  55         volatile uint32_t stats_clear;
  56         volatile uint32_t cplh_max;
  57         volatile uint32_t cpld_max;
  58         volatile uint32_t err_cnt;
  59         volatile uint32_t stall_ps;
  60         volatile uint32_t stall_ps_min;
  61         volatile uint32_t stall_ps_max;
  62         volatile uint32_t req_ps;
  63         volatile uint32_t req_ps_min;
  64         volatile uint32_t req_ps_max;
  65         volatile uint32_t req_dw_ps;
  66         volatile uint32_t req_dw_ps_min;
  67         volatile uint32_t req_dw_ps_max;
  68         volatile uint32_t cpl_ps;
  69         volatile uint32_t cpl_ps_min;
  70         volatile uint32_t cpl_ps_max;
  71         volatile uint32_t cpl_dw_ps;
  72         volatile uint32_t cpl_dw_ps_min;
  73         volatile uint32_t cpl_dw_ps_max;
  74         volatile uint32_t cplh_pending;
  75         volatile uint32_t cpld_pending;
  76         volatile uint32_t cplh_pending_max;
  77         volatile uint32_t cpld_pending_max;
  78         volatile uint32_t err_count_other;
  79         char eval[4];
  80         volatile int lasped;
  81 };
  82
  83 void ark_rqp_dump(struct ark_rqpace_t *rqp);
  84 void ark_rqp_stats_reset(struct ark_rqpace_t *rqp);
  85 int ark_rqp_lasped(struct ark_rqpace_t *rqp);
  86 #endif