drivers/hwtracing/intel_th/msu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Intel(R) Trace Hub Memory Storage Unit (MSU) data structures
   4  *
   5  * Copyright (C) 2014-2015 Intel Corporation.
   6  */
   7
   8 #ifndef __INTEL_TH_MSU_H__
   9 #define __INTEL_TH_MSU_H__
  10
  11 enum {
  12         REG_MSU_MSUPARAMS       = 0x0000,
  13         REG_MSU_MSUSTS          = 0x0008,
  14         REG_MSU_MINTCTL         = 0x0004, /* MSU-global interrupt control */
  15         REG_MSU_MSC0CTL         = 0x0100, /* MSC0 control */
  16         REG_MSU_MSC0STS         = 0x0104, /* MSC0 status */
  17         REG_MSU_MSC0BAR         = 0x0108, /* MSC0 output base address */
  18         REG_MSU_MSC0SIZE        = 0x010c, /* MSC0 output size */
  19         REG_MSU_MSC0MWP         = 0x0110, /* MSC0 write pointer */
  20         REG_MSU_MSC0NWSA        = 0x011c, /* MSC0 next window start address */
  21
  22         REG_MSU_MSC1CTL         = 0x0200, /* MSC1 control */
  23         REG_MSU_MSC1STS         = 0x0204, /* MSC1 status */
  24         REG_MSU_MSC1BAR         = 0x0208, /* MSC1 output base address */
  25         REG_MSU_MSC1SIZE        = 0x020c, /* MSC1 output size */
  26         REG_MSU_MSC1MWP         = 0x0210, /* MSC1 write pointer */
  27         REG_MSU_MSC1NWSA        = 0x021c, /* MSC1 next window start address */
  28 };
  29
  30 /* MSUSTS bits */
  31 #define MSUSTS_MSU_INT  BIT(0)
  32 #define MSUSTS_MSC0BLAST        BIT(16)
  33 #define MSUSTS_MSC1BLAST        BIT(24)
  34
  35 /* MSCnCTL bits */
  36 #define MSC_EN          BIT(0)
  37 #define MSC_WRAPEN      BIT(1)
  38 #define MSC_RD_HDR_OVRD BIT(2)
  39 #define MSC_MODE        (BIT(4) | BIT(5))
  40 #define MSC_LEN         (BIT(8) | BIT(9) | BIT(10))
  41
  42 /* MINTCTL bits */
  43 #define MICDE           BIT(0)
  44 #define M0BLIE          BIT(16)
  45 #define M1BLIE          BIT(24)
  46
  47 /* MSCnSTS bits */
  48 #define MSCSTS_WRAPSTAT BIT(1)  /* Wrap occurred */
  49 #define MSCSTS_PLE      BIT(2)  /* Pipeline Empty */
  50
  51 /*
  52  * Multiblock/multiwindow block descriptor
  53  */
  54 struct msc_block_desc {
  55         u32     sw_tag;
  56         u32     block_sz;
  57         u32     next_blk;
  58         u32     next_win;
  59         u32     res0[4];
  60         u32     hw_tag;
  61         u32     valid_dw;
  62         u32     ts_low;
  63         u32     ts_high;
  64         u32     res1[4];
  65 } __packed;
  66
  67 #define MSC_BDESC       sizeof(struct msc_block_desc)
  68 #define DATA_IN_PAGE    (PAGE_SIZE - MSC_BDESC)
  69
  70 /* MSC multiblock sw tag bits */
  71 #define MSC_SW_TAG_LASTBLK      BIT(0)
  72 #define MSC_SW_TAG_LASTWIN      BIT(1)
  73
  74 /* MSC multiblock hw tag bits */
  75 #define MSC_HW_TAG_TRIGGER      BIT(0)
  76 #define MSC_HW_TAG_BLOCKWRAP    BIT(1)
  77 #define MSC_HW_TAG_WINWRAP      BIT(2)
  78 #define MSC_HW_TAG_ENDBIT       BIT(3)
  79
  80 static inline unsigned long msc_data_sz(struct msc_block_desc *bdesc)
  81 {
  82         if (!bdesc->valid_dw)
  83                 return 0;
  84
  85         return bdesc->valid_dw * 4 - MSC_BDESC;
  86 }
  87
  88 static inline unsigned long msc_total_sz(struct msc_block_desc *bdesc)
  89 {
  90         return bdesc->valid_dw * 4;
  91 }
  92
  93 static inline unsigned long msc_block_sz(struct msc_block_desc *bdesc)
  94 {
  95         return bdesc->block_sz * 64 - MSC_BDESC;
  96 }
  97
  98 static inline bool msc_block_wrapped(struct msc_block_desc *bdesc)
  99 {
 100         if (bdesc->hw_tag & (MSC_HW_TAG_BLOCKWRAP | MSC_HW_TAG_WINWRAP))
 101                 return true;
 102
 103         return false;
 104 }
 105
 106 static inline bool msc_block_last_written(struct msc_block_desc *bdesc)
 107 {
 108         if ((bdesc->hw_tag & MSC_HW_TAG_ENDBIT) ||
 109             (msc_data_sz(bdesc) != msc_block_sz(bdesc)))
 110                 return true;
 111
 112         return false;
 113 }
 114
 115 /* waiting for Pipeline Empty bit(s) to assert for MSC */
 116 #define MSC_PLE_WAITLOOP_DEPTH  10000
 117
 118 #endif /* __INTEL_TH_MSU_H__ */