arch/powerpc/platforms/powernv/vas-debug.c

   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 #define pr_fmt(fmt) "vas: " fmt
  11
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <linux/debugfs.h>
  15 #include <linux/seq_file.h>
  16 #include "vas.h"
  17
  18 static struct dentry *vas_debugfs;
  19
  20 static char *cop_to_str(int cop)
  21 {
  22         switch (cop) {
  23         case VAS_COP_TYPE_FAULT:        return "Fault";
  24         case VAS_COP_TYPE_842:          return "NX-842 Normal Priority";
  25         case VAS_COP_TYPE_842_HIPRI:    return "NX-842 High Priority";
  26         case VAS_COP_TYPE_GZIP:         return "NX-GZIP Normal Priority";
  27         case VAS_COP_TYPE_GZIP_HIPRI:   return "NX-GZIP High Priority";
  28         case VAS_COP_TYPE_FTW:          return "Fast Thread-wakeup";
  29         default:                        return "Unknown";
  30         }
  31 }
  32
  33 static int info_dbg_show(struct seq_file *s, void *private)
  34 {
  35         struct vas_window *window = s->private;
  36
  37         mutex_lock(&vas_mutex);
  38
  39         /* ensure window is not unmapped */
  40         if (!window->hvwc_map)
  41                 goto unlock;
  42
  43         seq_printf(s, "Type: %s, %s\n", cop_to_str(window->cop),
  44                                         window->tx_win ? "Send" : "Receive");
  45         seq_printf(s, "Pid : %d\n", window->pid);
  46
  47 unlock:
  48         mutex_unlock(&vas_mutex);
  49         return 0;
  50 }
  51
  52 static int info_dbg_open(struct inode *inode, struct file *file)
  53 {
  54         return single_open(file, info_dbg_show, inode->i_private);
  55 }
  56
  57 static const struct file_operations info_fops = {
  58         .open           = info_dbg_open,
  59         .read           = seq_read,
  60         .llseek         = seq_lseek,
  61         .release        = single_release,
  62 };
  63
  64 static inline void print_reg(struct seq_file *s, struct vas_window *win,
  65                         char *name, u32 reg)
  66 {
  67         seq_printf(s, "0x%016llx %s\n", read_hvwc_reg(win, name, reg), name);
  68 }
  69
  70 static int hvwc_dbg_show(struct seq_file *s, void *private)
  71 {
  72         struct vas_window *window = s->private;
  73
  74         mutex_lock(&vas_mutex);
  75
  76         /* ensure window is not unmapped */
  77         if (!window->hvwc_map)
  78                 goto unlock;
  79
  80         print_reg(s, window, VREG(LPID));
  81         print_reg(s, window, VREG(PID));
  82         print_reg(s, window, VREG(XLATE_MSR));
  83         print_reg(s, window, VREG(XLATE_LPCR));
  84         print_reg(s, window, VREG(XLATE_CTL));
  85         print_reg(s, window, VREG(AMR));
  86         print_reg(s, window, VREG(SEIDR));
  87         print_reg(s, window, VREG(FAULT_TX_WIN));
  88         print_reg(s, window, VREG(OSU_INTR_SRC_RA));
  89         print_reg(s, window, VREG(HV_INTR_SRC_RA));
  90         print_reg(s, window, VREG(PSWID));
  91         print_reg(s, window, VREG(LFIFO_BAR));
  92         print_reg(s, window, VREG(LDATA_STAMP_CTL));
  93         print_reg(s, window, VREG(LDMA_CACHE_CTL));
  94         print_reg(s, window, VREG(LRFIFO_PUSH));
  95         print_reg(s, window, VREG(CURR_MSG_COUNT));
  96         print_reg(s, window, VREG(LNOTIFY_AFTER_COUNT));
  97         print_reg(s, window, VREG(LRX_WCRED));
  98         print_reg(s, window, VREG(LRX_WCRED_ADDER));
  99         print_reg(s, window, VREG(TX_WCRED));
 100         print_reg(s, window, VREG(TX_WCRED_ADDER));
 101         print_reg(s, window, VREG(LFIFO_SIZE));
 102         print_reg(s, window, VREG(WINCTL));
 103         print_reg(s, window, VREG(WIN_STATUS));
 104         print_reg(s, window, VREG(WIN_CTX_CACHING_CTL));
 105         print_reg(s, window, VREG(TX_RSVD_BUF_COUNT));
 106         print_reg(s, window, VREG(LRFIFO_WIN_PTR));
 107         print_reg(s, window, VREG(LNOTIFY_CTL));
 108         print_reg(s, window, VREG(LNOTIFY_PID));
 109         print_reg(s, window, VREG(LNOTIFY_LPID));
 110         print_reg(s, window, VREG(LNOTIFY_TID));
 111         print_reg(s, window, VREG(LNOTIFY_SCOPE));
 112         print_reg(s, window, VREG(NX_UTIL_ADDER));
 113 unlock:
 114         mutex_unlock(&vas_mutex);
 115         return 0;
 116 }
 117
 118 static int hvwc_dbg_open(struct inode *inode, struct file *file)
 119 {
 120         return single_open(file, hvwc_dbg_show, inode->i_private);
 121 }
 122
 123 static const struct file_operations hvwc_fops = {
 124         .open           = hvwc_dbg_open,
 125         .read           = seq_read,
 126         .llseek         = seq_lseek,
 127         .release        = single_release,
 128 };
 129
 130 void vas_window_free_dbgdir(struct vas_window *window)
 131 {
 132         if (window->dbgdir) {
 133                 debugfs_remove_recursive(window->dbgdir);
 134                 kfree(window->dbgname);
 135                 window->dbgdir = NULL;
 136                 window->dbgname = NULL;
 137         }
 138 }
 139
 140 void vas_window_init_dbgdir(struct vas_window *window)
 141 {
 142         struct dentry *f, *d;
 143
 144         if (!window->vinst->dbgdir)
 145                 return;
 146
 147         window->dbgname = kzalloc(16, GFP_KERNEL);
 148         if (!window->dbgname)
 149                 return;
 150
 151         snprintf(window->dbgname, 16, "w%d", window->winid);
 152
 153         d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir);
 154         if (IS_ERR(d))
 155                 goto free_name;
 156
 157         window->dbgdir = d;
 158
 159         f = debugfs_create_file("info", 0444, d, window, &info_fops);
 160         if (IS_ERR(f))
 161                 goto remove_dir;
 162
 163         f = debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops);
 164         if (IS_ERR(f))
 165                 goto remove_dir;
 166
 167         return;
 168
 169 free_name:
 170         kfree(window->dbgname);
 171         window->dbgname = NULL;
 172
 173 remove_dir:
 174         debugfs_remove_recursive(window->dbgdir);
 175         window->dbgdir = NULL;
 176 }
 177
 178 void vas_instance_init_dbgdir(struct vas_instance *vinst)
 179 {
 180         struct dentry *d;
 181
 182         if (!vas_debugfs)
 183                 return;
 184
 185         vinst->dbgname = kzalloc(16, GFP_KERNEL);
 186         if (!vinst->dbgname)
 187                 return;
 188
 189         snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id);
 190
 191         d = debugfs_create_dir(vinst->dbgname, vas_debugfs);
 192         if (IS_ERR(d))
 193                 goto free_name;
 194
 195         vinst->dbgdir = d;
 196         return;
 197
 198 free_name:
 199         kfree(vinst->dbgname);
 200         vinst->dbgname = NULL;
 201         vinst->dbgdir = NULL;
 202 }
 203
 204 void vas_init_dbgdir(void)
 205 {
 206         vas_debugfs = debugfs_create_dir("vas", NULL);
 207         if (IS_ERR(vas_debugfs))
 208                 vas_debugfs = NULL;
 209 }