LXR linux/drivers/hwtracing/intel

   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
  11enum {
  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 */
  54struct 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
  80static 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
  88static inline unsigned long msc_total_sz(struct msc_block_desc *bdesc)
  89{
  90        return bdesc->valid_dw * 4;
  91}
  92
  93static inline unsigned long msc_block_sz(struct msc_block_desc *bdesc)
  94{
  95        return bdesc->block_sz * 64 - MSC_BDESC;
  96}
  97
  98static 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
 106static 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__ */
 119