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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Huawei HiNIC PCI Express Linux driver
   4  * Copyright(c) 2017 Huawei Technologies Co., Ltd
   5  */
   6
   7 #ifndef HINIC_HW_IO_H
   8 #define HINIC_HW_IO_H
   9
  10 #include <linux/types.h>
  11 #include <linux/pci.h>
  12 #include <linux/semaphore.h>
  13 #include <linux/sizes.h>
  14
  15 #include "hinic_hw_if.h"
  16 #include "hinic_hw_eqs.h"
  17 #include "hinic_hw_wq.h"
  18 #include "hinic_hw_cmdq.h"
  19 #include "hinic_hw_qp.h"
  20
  21 #define HINIC_DB_PAGE_SIZE      SZ_4K
  22 #define HINIC_DB_SIZE           SZ_4M
  23
  24 #define HINIC_DB_MAX_AREAS      (HINIC_DB_SIZE / HINIC_DB_PAGE_SIZE)
  25
  26 enum hinic_db_type {
  27         HINIC_DB_CMDQ_TYPE,
  28         HINIC_DB_SQ_TYPE,
  29 };
  30
  31 enum hinic_io_path {
  32         HINIC_CTRL_PATH,
  33         HINIC_DATA_PATH,
  34 };
  35
  36 struct hinic_free_db_area {
  37         int             db_idx[HINIC_DB_MAX_AREAS];
  38
  39         int             alloc_pos;
  40         int             return_pos;
  41
  42         int             num_free;
  43
  44         /* Lock for getting db area */
  45         struct semaphore        idx_lock;
  46 };
  47
  48 struct hinic_func_to_io {
  49         struct hinic_hwif       *hwif;
  50
  51         struct hinic_ceqs       ceqs;
  52
  53         struct hinic_wqs        wqs;
  54
  55         struct hinic_wq         *sq_wq;
  56         struct hinic_wq         *rq_wq;
  57
  58         struct hinic_qp         *qps;
  59         u16                     max_qps;
  60
  61         void __iomem            **sq_db;
  62         void __iomem            *db_base;
  63
  64         void                    *ci_addr_base;
  65         dma_addr_t              ci_dma_base;
  66
  67         struct hinic_free_db_area       free_db_area;
  68
  69         void __iomem                    *cmdq_db_area[HINIC_MAX_CMDQ_TYPES];
  70
  71         struct hinic_cmdqs              cmdqs;
  72 };
  73
  74 int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
  75                         u16 base_qpn, int num_qps,
  76                         struct msix_entry *sq_msix_entries,
  77                         struct msix_entry *rq_msix_entries);
  78
  79 void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io,
  80                           int num_qps);
  81
  82 int hinic_io_init(struct hinic_func_to_io *func_to_io,
  83                   struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
  84                   struct msix_entry *ceq_msix_entries);
  85
  86 void hinic_io_free(struct hinic_func_to_io *func_to_io);
  87
  88 #endif