LXR linux/drivers/net/ethernet/huawei/hinic/hinic_hw

   1/*
   2 * Huawei HiNIC PCI Express Linux driver
   3 * Copyright(c) 2017 Huawei Technologies Co., Ltd
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms and conditions of the GNU General Public License,
   7 * version 2, as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * for more details.
  13 *
  14 */
  15
  16#ifndef HINIC_HW_IO_H
  17#define HINIC_HW_IO_H
  18
  19#include <linux/types.h>
  20#include <linux/pci.h>
  21#include <linux/semaphore.h>
  22#include <linux/sizes.h>
  23
  24#include "hinic_hw_if.h"
  25#include "hinic_hw_eqs.h"
  26#include "hinic_hw_wq.h"
  27#include "hinic_hw_cmdq.h"
  28#include "hinic_hw_qp.h"
  29
  30#define HINIC_DB_PAGE_SIZE      SZ_4K
  31#define HINIC_DB_SIZE           SZ_4M
  32
  33#define HINIC_DB_MAX_AREAS      (HINIC_DB_SIZE / HINIC_DB_PAGE_SIZE)
  34
  35enum hinic_db_type {
  36        HINIC_DB_CMDQ_TYPE,
  37        HINIC_DB_SQ_TYPE,
  38};
  39
  40enum hinic_io_path {
  41        HINIC_CTRL_PATH,
  42        HINIC_DATA_PATH,
  43};
  44
  45struct hinic_free_db_area {
  46        int             db_idx[HINIC_DB_MAX_AREAS];
  47
  48        int             alloc_pos;
  49        int             return_pos;
  50
  51        int             num_free;
  52
  53        /* Lock for getting db area */
  54        struct semaphore        idx_lock;
  55};
  56
  57struct hinic_func_to_io {
  58        struct hinic_hwif       *hwif;
  59
  60        struct hinic_ceqs       ceqs;
  61
  62        struct hinic_wqs        wqs;
  63
  64        struct hinic_wq         *sq_wq;
  65        struct hinic_wq         *rq_wq;
  66
  67        struct hinic_qp         *qps;
  68        u16                     max_qps;
  69
  70        void __iomem            **sq_db;
  71        void __iomem            *db_base;
  72
  73        void                    *ci_addr_base;
  74        dma_addr_t              ci_dma_base;
  75
  76        struct hinic_free_db_area       free_db_area;
  77
  78        void __iomem                    *cmdq_db_area[HINIC_MAX_CMDQ_TYPES];
  79
  80        struct hinic_cmdqs              cmdqs;
  81};
  82
  83int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
  84                        u16 base_qpn, int num_qps,
  85                        struct msix_entry *sq_msix_entries,
  86                        struct msix_entry *rq_msix_entries);
  87
  88void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io,
  89                          int num_qps);
  90
  91int hinic_io_init(struct hinic_func_to_io *func_to_io,
  92                  struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
  93                  struct msix_entry *ceq_msix_entries);
  94
  95void hinic_io_free(struct hinic_func_to_io *func_to_io);
  96
  97#endif
  98