drivers/net/ethernet/huawei/hinic/hinic_hw_io.h

   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
  35 enum hinic_db_type {
  36         HINIC_DB_CMDQ_TYPE,
  37         HINIC_DB_SQ_TYPE,
  38 };
  39
  40 enum hinic_io_path {
  41         HINIC_CTRL_PATH,
  42         HINIC_DATA_PATH,
  43 };
  44
  45 struct 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
  57 struct 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
  83 int 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
  88 void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io,
  89                           int num_qps);
  90
  91 int 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
  95 void hinic_io_free(struct hinic_func_to_io *func_to_io);
  96
  97 #endif