drivers/net/qede/base/ecore_cxt_api.h

   1 /*
   2  * Copyright (c) 2016 QLogic Corporation.
   3  * All rights reserved.
   4  * www.qlogic.com
   5  *
   6  * See LICENSE.qede_pmd for copyright and licensing details.
   7  */
   8
   9 #ifndef __ECORE_CXT_API_H__
  10 #define __ECORE_CXT_API_H__
  11
  12 struct ecore_hwfn;
  13
  14 struct ecore_cxt_info {
  15         void *p_cxt;
  16         u32 iid;
  17         enum protocol_type type;
  18 };
  19
  20 #define MAX_TID_BLOCKS                  512
  21 struct ecore_tid_mem {
  22         u32 tid_size;
  23         u32 num_tids_per_block;
  24         u32 waste;
  25         u8 *blocks[MAX_TID_BLOCKS];     /* 4K */
  26 };
  27
  28 static OSAL_INLINE void *get_task_mem(struct ecore_tid_mem *info, u32 tid)
  29 {
  30         /* note: waste is superfluous */
  31         return (void *)(info->blocks[tid / info->num_tids_per_block] +
  32                         (tid % info->num_tids_per_block) * info->tid_size);
  33
  34         /* more elaborate alternative with no modulo
  35          * u32 mask = info->tid_size * info->num_tids_per_block +
  36          *            info->waste - 1;
  37          * u32 index = tid / info->num_tids_per_block;
  38          * u32 offset = tid * info->tid_size + index * info->waste;
  39          * return (void *)(blocks[index] + (offset & mask));
  40          */
  41 }
  42
  43 /**
  44 * @brief ecore_cxt_acquire - Acquire a new cid of a specific protocol type
  45 *
  46 * @param p_hwfn
  47 * @param type
  48 * @param p_cid
  49 *
  50 * @return enum _ecore_status_t
  51 */
  52 enum _ecore_status_t ecore_cxt_acquire_cid(struct ecore_hwfn *p_hwfn,
  53                                            enum protocol_type type,
  54                                            u32 *p_cid);
  55
  56 /**
  57 * @brief ecoreo_cid_get_cxt_info - Returns the context info for a specific cid
  58 *
  59 *
  60 * @param p_hwfn
  61 * @param p_info in/out
  62 *
  63 * @return enum _ecore_status_t
  64 */
  65 enum _ecore_status_t ecore_cxt_get_cid_info(struct ecore_hwfn *p_hwfn,
  66                                             struct ecore_cxt_info *p_info);
  67
  68 /**
  69 * @brief ecore_cxt_get_tid_mem_info
  70 *
  71 * @param p_hwfn
  72 * @param p_info
  73 *
  74 * @return enum _ecore_status_t
  75 */
  76 enum _ecore_status_t ecore_cxt_get_tid_mem_info(struct ecore_hwfn *p_hwfn,
  77                                                 struct ecore_tid_mem *p_info);
  78
  79 #endif