drivers/net/ethernet/huawei/hinic/hinic_hw_wq.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_WQ_H
  17 #define HINIC_HW_WQ_H
  18
  19 #include <linux/types.h>
  20 #include <linux/semaphore.h>
  21 #include <linux/atomic.h>
  22
  23 #include "hinic_hw_if.h"
  24 #include "hinic_hw_wqe.h"
  25
  26 struct hinic_free_block {
  27         int     page_idx;
  28         int     block_idx;
  29 };
  30
  31 struct hinic_wq {
  32         struct hinic_hwif       *hwif;
  33
  34         int             page_idx;
  35         int             block_idx;
  36
  37         u16             wqebb_size;
  38         u16             wq_page_size;
  39         u16             q_depth;
  40         u16             max_wqe_size;
  41         u16             num_wqebbs_per_page;
  42
  43         /* The addresses are 64 bit in the HW */
  44         u64             block_paddr;
  45         void            **shadow_block_vaddr;
  46         u64             *block_vaddr;
  47
  48         int             num_q_pages;
  49         u8              *shadow_wqe;
  50         u16             *shadow_idx;
  51
  52         atomic_t        cons_idx;
  53         atomic_t        prod_idx;
  54         atomic_t        delta;
  55         u16             mask;
  56 };
  57
  58 struct hinic_wqs {
  59         struct hinic_hwif       *hwif;
  60         int                     num_pages;
  61
  62         /* The addresses are 64 bit in the HW */
  63         u64                     *page_paddr;
  64         u64                     **page_vaddr;
  65         void                    ***shadow_page_vaddr;
  66
  67         struct hinic_free_block *free_blocks;
  68         int                     alloc_blk_pos;
  69         int                     return_blk_pos;
  70         int                     num_free_blks;
  71
  72         /* Lock for getting a free block from the WQ set */
  73         struct semaphore        alloc_blocks_lock;
  74 };
  75
  76 struct hinic_cmdq_pages {
  77         /* The addresses are 64 bit in the HW */
  78         u64                     page_paddr;
  79         u64                     *page_vaddr;
  80         void                    **shadow_page_vaddr;
  81
  82         struct hinic_hwif       *hwif;
  83 };
  84
  85 int hinic_wqs_cmdq_alloc(struct hinic_cmdq_pages *cmdq_pages,
  86                          struct hinic_wq *wq, struct hinic_hwif *hwif,
  87                          int cmdq_blocks, u16 wqebb_size, u16 wq_page_size,
  88                          u16 q_depth, u16 max_wqe_size);
  89
  90 void hinic_wqs_cmdq_free(struct hinic_cmdq_pages *cmdq_pages,
  91                          struct hinic_wq *wq, int cmdq_blocks);
  92
  93 int hinic_wqs_alloc(struct hinic_wqs *wqs, int num_wqs,
  94                     struct hinic_hwif *hwif);
  95
  96 void hinic_wqs_free(struct hinic_wqs *wqs);
  97
  98 int hinic_wq_allocate(struct hinic_wqs *wqs, struct hinic_wq *wq,
  99                       u16 wqebb_size, u16 wq_page_size, u16 q_depth,
 100                       u16 max_wqe_size);
 101
 102 void hinic_wq_free(struct hinic_wqs *wqs, struct hinic_wq *wq);
 103
 104 struct hinic_hw_wqe *hinic_get_wqe(struct hinic_wq *wq, unsigned int wqe_size,
 105                                    u16 *prod_idx);
 106
 107 void hinic_put_wqe(struct hinic_wq *wq, unsigned int wqe_size);
 108
 109 struct hinic_hw_wqe *hinic_read_wqe(struct hinic_wq *wq, unsigned int wqe_size,
 110                                     u16 *cons_idx);
 111
 112 struct hinic_hw_wqe *hinic_read_wqe_direct(struct hinic_wq *wq, u16 cons_idx);
 113
 114 void hinic_write_wqe(struct hinic_wq *wq, struct hinic_hw_wqe *wqe,
 115                      unsigned int wqe_size);
 116
 117 #endif