arch/powerpc/include/asm/vas.h

   1 /*
   2  * Copyright 2016-17 IBM Corp.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version
   7  * 2 of the License, or (at your option) any later version.
   8  */
   9
  10 #ifndef _ASM_POWERPC_VAS_H
  11 #define _ASM_POWERPC_VAS_H
  12
  13 /*
  14  * Min and max FIFO sizes are based on Version 1.05 Section 3.1.4.25
  15  * (Local FIFO Size Register) of the VAS workbook.
  16  */
  17 #define VAS_RX_FIFO_SIZE_MIN    (1 << 10)       /* 1KB */
  18 #define VAS_RX_FIFO_SIZE_MAX    (8 << 20)       /* 8MB */
  19
  20 /*
  21  * Threshold Control Mode: Have paste operation fail if the number of
  22  * requests in receive FIFO exceeds a threshold.
  23  *
  24  * NOTE: No special error code yet if paste is rejected because of these
  25  *       limits. So users can't distinguish between this and other errors.
  26  */
  27 #define VAS_THRESH_DISABLED             0
  28 #define VAS_THRESH_FIFO_GT_HALF_FULL    1
  29 #define VAS_THRESH_FIFO_GT_QTR_FULL     2
  30 #define VAS_THRESH_FIFO_GT_EIGHTH_FULL  3
  31
  32 /*
  33  * Get/Set bit fields
  34  */
  35 #define GET_FIELD(m, v)                (((v) & (m)) >> MASK_LSH(m))
  36 #define MASK_LSH(m)            (__builtin_ffsl(m) - 1)
  37 #define SET_FIELD(m, v, val)   \
  38                 (((v) & ~(m)) | ((((typeof(v))(val)) << MASK_LSH(m)) & (m)))
  39
  40 /*
  41  * Co-processor Engine type.
  42  */
  43 enum vas_cop_type {
  44         VAS_COP_TYPE_FAULT,
  45         VAS_COP_TYPE_842,
  46         VAS_COP_TYPE_842_HIPRI,
  47         VAS_COP_TYPE_GZIP,
  48         VAS_COP_TYPE_GZIP_HIPRI,
  49         VAS_COP_TYPE_FTW,
  50         VAS_COP_TYPE_MAX,
  51 };
  52
  53 #endif /* __ASM_POWERPC_VAS_H */