LXR linux/drivers/misc/cxl/debugfs.c

   1/*
   2 * Copyright 2014 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#include <linux/debugfs.h>
  11#include <linux/kernel.h>
  12#include <linux/slab.h>
  13
  14#include "cxl.h"
  15
  16static struct dentry *cxl_debugfs;
  17
  18/* Helpers to export CXL mmaped IO registers via debugfs */
  19static int debugfs_io_u64_get(void *data, u64 *val)
  20{
  21        *val = in_be64((u64 __iomem *)data);
  22        return 0;
  23}
  24
  25static int debugfs_io_u64_set(void *data, u64 val)
  26{
  27        out_be64((u64 __iomem *)data, val);
  28        return 0;
  29}
  30DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
  31                         "0x%016llx\n");
  32
  33static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode,
  34                                            struct dentry *parent, u64 __iomem *value)
  35{
  36        return debugfs_create_file_unsafe(name, mode, parent,
  37                                          (void __force *)value, &fops_io_x64);
  38}
  39
  40void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
  41{
  42        debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
  43        debugfs_create_io_x64("fir_mask", 0400, dir,
  44                              _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
  45        debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
  46        debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
  47        debugfs_create_io_x64("debug", 0600, dir,
  48                              _cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
  49        debugfs_create_io_x64("xsl-debug", 0600, dir,
  50                              _cxl_p1_addr(adapter, CXL_XSL9_DBG));
  51}
  52
  53void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
  54{
  55        debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
  56        debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
  57        debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
  58        debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
  59}
  60
  61void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir)
  62{
  63        debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC));
  64}
  65
  66int cxl_debugfs_adapter_add(struct cxl *adapter)
  67{
  68        struct dentry *dir;
  69        char buf[32];
  70
  71        if (!cxl_debugfs)
  72                return -ENODEV;
  73
  74        snprintf(buf, 32, "card%i", adapter->adapter_num);
  75        dir = debugfs_create_dir(buf, cxl_debugfs);
  76        if (IS_ERR(dir))
  77                return PTR_ERR(dir);
  78        adapter->debugfs = dir;
  79
  80        debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
  81
  82        if (adapter->native->sl_ops->debugfs_add_adapter_regs)
  83                adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
  84        return 0;
  85}
  86
  87void cxl_debugfs_adapter_remove(struct cxl *adapter)
  88{
  89        debugfs_remove_recursive(adapter->debugfs);
  90}
  91
  92void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
  93{
  94        debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
  95}
  96
  97void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
  98{
  99        debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
 100        debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
 101
 102        debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
 103        debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
 104        debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
 105        debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
 106}
 107
 108int cxl_debugfs_afu_add(struct cxl_afu *afu)
 109{
 110        struct dentry *dir;
 111        char buf[32];
 112
 113        if (!afu->adapter->debugfs)
 114                return -ENODEV;
 115
 116        snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
 117        dir = debugfs_create_dir(buf, afu->adapter->debugfs);
 118        if (IS_ERR(dir))
 119                return PTR_ERR(dir);
 120        afu->debugfs = dir;
 121
 122        debugfs_create_io_x64("sr",         S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
 123        debugfs_create_io_x64("dsisr",      S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
 124        debugfs_create_io_x64("dar",        S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
 125
 126        debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
 127
 128        if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
 129                afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
 130
 131        return 0;
 132}
 133
 134void cxl_debugfs_afu_remove(struct cxl_afu *afu)
 135{
 136        debugfs_remove_recursive(afu->debugfs);
 137}
 138
 139int __init cxl_debugfs_init(void)
 140{
 141        struct dentry *ent;
 142
 143        if (!cpu_has_feature(CPU_FTR_HVMODE))
 144                return 0;
 145
 146        ent = debugfs_create_dir("cxl", NULL);
 147        if (IS_ERR(ent))
 148                return PTR_ERR(ent);
 149        cxl_debugfs = ent;
 150
 151        return 0;
 152}
 153
 154void cxl_debugfs_exit(void)
 155{
 156        debugfs_remove_recursive(cxl_debugfs);
 157}
 158