drivers/staging/wfx/debug.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Debugfs interface.
   4  *
   5  * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
   6  * Copyright (c) 2010, ST-Ericsson
   7  */
   8 #include <linux/debugfs.h>
   9 #include <linux/seq_file.h>
  10 #include <linux/crc32.h>
  11
  12 #include "debug.h"
  13 #include "wfx.h"
  14 #include "sta.h"
  15 #include "main.h"
  16 #include "hif_tx.h"
  17 #include "hif_tx_mib.h"
  18
  19 #define CREATE_TRACE_POINTS
  20 #include "traces.h"
  21
  22 static const struct trace_print_flags hif_msg_print_map[] = {
  23         hif_msg_list,
  24 };
  25
  26 static const struct trace_print_flags hif_mib_print_map[] = {
  27         hif_mib_list,
  28 };
  29
  30 static const struct trace_print_flags wfx_reg_print_map[] = {
  31         wfx_reg_list,
  32 };
  33
  34 static const char *get_symbol(unsigned long val,
  35                               const struct trace_print_flags *symbol_array)
  36 {
  37         int i;
  38
  39         for (i = 0; symbol_array[i].mask != -1; i++) {
  40                 if (val == symbol_array[i].mask)
  41                         return symbol_array[i].name;
  42         }
  43
  44         return "unknown";
  45 }
  46
  47 const char *get_hif_name(unsigned long id)
  48 {
  49         return get_symbol(id, hif_msg_print_map);
  50 }
  51
  52 const char *get_mib_name(unsigned long id)
  53 {
  54         return get_symbol(id, hif_mib_print_map);
  55 }
  56
  57 const char *get_reg_name(unsigned long id)
  58 {
  59         return get_symbol(id, wfx_reg_print_map);
  60 }
  61
  62 static int wfx_counters_show(struct seq_file *seq, void *v)
  63 {
  64         int ret, i;
  65         struct wfx_dev *wdev = seq->private;
  66         struct hif_mib_extended_count_table counters[3];
  67
  68         for (i = 0; i < ARRAY_SIZE(counters); i++) {
  69                 ret = hif_get_counters_table(wdev, i, counters + i);
  70                 if (ret < 0)
  71                         return ret;
  72                 if (ret > 0)
  73                         return -EIO;
  74         }
  75
  76         seq_printf(seq, "%-24s %12s %12s %12s\n",
  77                    "", "global", "iface 0", "iface 1");
  78
  79 #define PUT_COUNTER(name) \
  80         seq_printf(seq, "%-24s %12d %12d %12d\n", #name, \
  81                    le32_to_cpu(counters[2].count_##name), \
  82                    le32_to_cpu(counters[0].count_##name), \
  83                    le32_to_cpu(counters[1].count_##name))
  84
  85         PUT_COUNTER(tx_packets);
  86         PUT_COUNTER(tx_multicast_frames);
  87         PUT_COUNTER(tx_frames_success);
  88         PUT_COUNTER(tx_frame_failures);
  89         PUT_COUNTER(tx_frames_retried);
  90         PUT_COUNTER(tx_frames_multi_retried);
  91
  92         PUT_COUNTER(rts_success);
  93         PUT_COUNTER(rts_failures);
  94         PUT_COUNTER(ack_failures);
  95
  96         PUT_COUNTER(rx_packets);
  97         PUT_COUNTER(rx_frames_success);
  98         PUT_COUNTER(rx_packet_errors);
  99         PUT_COUNTER(plcp_errors);
 100         PUT_COUNTER(fcs_errors);
 101         PUT_COUNTER(rx_decryption_failures);
 102         PUT_COUNTER(rx_mic_failures);
 103         PUT_COUNTER(rx_no_key_failures);
 104         PUT_COUNTER(rx_frame_duplicates);
 105         PUT_COUNTER(rx_multicast_frames);
 106         PUT_COUNTER(rx_cmacicv_errors);
 107         PUT_COUNTER(rx_cmac_replays);
 108         PUT_COUNTER(rx_mgmt_ccmp_replays);
 109
 110         PUT_COUNTER(rx_beacon);
 111         PUT_COUNTER(miss_beacon);
 112
 113 #undef PUT_COUNTER
 114
 115         for (i = 0; i < ARRAY_SIZE(counters[0].reserved); i++)
 116                 seq_printf(seq, "reserved[%02d]%12s %12d %12d %12d\n", i, "",
 117                            le32_to_cpu(counters[2].reserved[i]),
 118                            le32_to_cpu(counters[0].reserved[i]),
 119                            le32_to_cpu(counters[1].reserved[i]));
 120
 121         return 0;
 122 }
 123 DEFINE_SHOW_ATTRIBUTE(wfx_counters);
 124
 125 static const char * const channel_names[] = {
 126         [0] = "1M",
 127         [1] = "2M",
 128         [2] = "5.5M",
 129         [3] = "11M",
 130         /* Entries 4 and 5 does not exist */
 131         [6] = "6M",
 132         [7] = "9M",
 133         [8] = "12M",
 134         [9] = "18M",
 135         [10] = "24M",
 136         [11] = "36M",
 137         [12] = "48M",
 138         [13] = "54M",
 139         [14] = "MCS0",
 140         [15] = "MCS1",
 141         [16] = "MCS2",
 142         [17] = "MCS3",
 143         [18] = "MCS4",
 144         [19] = "MCS5",
 145         [20] = "MCS6",
 146         [21] = "MCS7",
 147 };
 148
 149 static int wfx_rx_stats_show(struct seq_file *seq, void *v)
 150 {
 151         struct wfx_dev *wdev = seq->private;
 152         struct hif_rx_stats *st = &wdev->rx_stats;
 153         int i;
 154
 155         mutex_lock(&wdev->rx_stats_lock);
 156         seq_printf(seq, "Timestamp: %dus\n", st->date);
 157         seq_printf(seq, "Low power clock: frequency %uHz, external %s\n",
 158                    le32_to_cpu(st->pwr_clk_freq),
 159                    st->is_ext_pwr_clk ? "yes" : "no");
 160         seq_printf(seq,
 161                    "Num. of frames: %d, PER (x10e4): %d, Throughput: %dKbps/s\n",
 162                    st->nb_rx_frame, st->per_total, st->throughput);
 163         seq_puts(seq, "       Num. of      PER     RSSI      SNR      CFO\n");
 164         seq_puts(seq, "        frames  (x10e4)    (dBm)     (dB)    (kHz)\n");
 165         for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
 166                 if (channel_names[i])
 167                         seq_printf(seq, "%5s %8d %8d %8d %8d %8d\n",
 168                                    channel_names[i],
 169                                    le32_to_cpu(st->nb_rx_by_rate[i]),
 170                                    le16_to_cpu(st->per[i]),
 171                                    (s16)le16_to_cpu(st->rssi[i]) / 100,
 172                                    (s16)le16_to_cpu(st->snr[i]) / 100,
 173                                    (s16)le16_to_cpu(st->cfo[i]));
 174         }
 175         mutex_unlock(&wdev->rx_stats_lock);
 176
 177         return 0;
 178 }
 179 DEFINE_SHOW_ATTRIBUTE(wfx_rx_stats);
 180
 181 static int wfx_tx_power_loop_show(struct seq_file *seq, void *v)
 182 {
 183         struct wfx_dev *wdev = seq->private;
 184         struct hif_tx_power_loop_info *st = &wdev->tx_power_loop_info;
 185         int tmp;
 186
 187         mutex_lock(&wdev->tx_power_loop_info_lock);
 188         tmp = le16_to_cpu(st->tx_gain_dig);
 189         seq_printf(seq, "Tx gain digital: %d\n", tmp);
 190         tmp = le16_to_cpu(st->tx_gain_pa);
 191         seq_printf(seq, "Tx gain PA: %d\n", tmp);
 192         tmp = (s16)le16_to_cpu(st->target_pout);
 193         seq_printf(seq, "Target Pout: %d.%02d dBm\n", tmp / 4, (tmp % 4) * 25);
 194         tmp = (s16)le16_to_cpu(st->p_estimation);
 195         seq_printf(seq, "FEM Pout: %d.%02d dBm\n", tmp / 4, (tmp % 4) * 25);
 196         tmp = le16_to_cpu(st->vpdet);
 197         seq_printf(seq, "Vpdet: %d mV\n", tmp);
 198         seq_printf(seq, "Measure index: %d\n", st->measurement_index);
 199         mutex_unlock(&wdev->tx_power_loop_info_lock);
 200
 201         return 0;
 202 }
 203 DEFINE_SHOW_ATTRIBUTE(wfx_tx_power_loop);
 204
 205 static ssize_t wfx_send_pds_write(struct file *file,
 206                                   const char __user *user_buf,
 207                                   size_t count, loff_t *ppos)
 208 {
 209         struct wfx_dev *wdev = file->private_data;
 210         char *buf;
 211         int ret;
 212
 213         if (*ppos != 0) {
 214                 dev_dbg(wdev->dev, "PDS data must be written in one transaction");
 215                 return -EBUSY;
 216         }
 217         buf = memdup_user(user_buf, count);
 218         if (IS_ERR(buf))
 219                 return PTR_ERR(buf);
 220         *ppos = *ppos + count;
 221         ret = wfx_send_pds(wdev, buf, count);
 222         kfree(buf);
 223         if (ret < 0)
 224                 return ret;
 225         return count;
 226 }
 227
 228 static const struct file_operations wfx_send_pds_fops = {
 229         .open = simple_open,
 230         .write = wfx_send_pds_write,
 231 };
 232
 233 struct dbgfs_hif_msg {
 234         struct wfx_dev *wdev;
 235         struct completion complete;
 236         u8 reply[1024];
 237         int ret;
 238 };
 239
 240 static ssize_t wfx_send_hif_msg_write(struct file *file,
 241                                       const char __user *user_buf,
 242                                       size_t count, loff_t *ppos)
 243 {
 244         struct dbgfs_hif_msg *context = file->private_data;
 245         struct wfx_dev *wdev = context->wdev;
 246         struct hif_msg *request;
 247
 248         if (completion_done(&context->complete)) {
 249                 dev_dbg(wdev->dev, "read previous result before start a new one\n");
 250                 return -EBUSY;
 251         }
 252         if (count < sizeof(struct hif_msg))
 253                 return -EINVAL;
 254
 255         // wfx_cmd_send() checks that reply buffer is wide enough, but does not
 256         // return precise length read. User have to know how many bytes should
 257         // be read. Filling reply buffer with a memory pattern may help user.
 258         memset(context->reply, 0xFF, sizeof(context->reply));
 259         request = memdup_user(user_buf, count);
 260         if (IS_ERR(request))
 261                 return PTR_ERR(request);
 262         if (le16_to_cpu(request->len) != count) {
 263                 kfree(request);
 264                 return -EINVAL;
 265         }
 266         context->ret = wfx_cmd_send(wdev, request, context->reply,
 267                                     sizeof(context->reply), false);
 268
 269         kfree(request);
 270         complete(&context->complete);
 271         return count;
 272 }
 273
 274 static ssize_t wfx_send_hif_msg_read(struct file *file, char __user *user_buf,
 275                                      size_t count, loff_t *ppos)
 276 {
 277         struct dbgfs_hif_msg *context = file->private_data;
 278         int ret;
 279
 280         if (count > sizeof(context->reply))
 281                 return -EINVAL;
 282         ret = wait_for_completion_interruptible(&context->complete);
 283         if (ret)
 284                 return ret;
 285         if (context->ret < 0)
 286                 return context->ret;
 287         // Be careful, write() is waiting for a full message while read()
 288         // only returns a payload
 289         if (copy_to_user(user_buf, context->reply, count))
 290                 return -EFAULT;
 291
 292         return count;
 293 }
 294
 295 static int wfx_send_hif_msg_open(struct inode *inode, struct file *file)
 296 {
 297         struct dbgfs_hif_msg *context = kzalloc(sizeof(*context), GFP_KERNEL);
 298
 299         if (!context)
 300                 return -ENOMEM;
 301         context->wdev = inode->i_private;
 302         init_completion(&context->complete);
 303         file->private_data = context;
 304         return 0;
 305 }
 306
 307 static int wfx_send_hif_msg_release(struct inode *inode, struct file *file)
 308 {
 309         struct dbgfs_hif_msg *context = file->private_data;
 310
 311         kfree(context);
 312         return 0;
 313 }
 314
 315 static const struct file_operations wfx_send_hif_msg_fops = {
 316         .open = wfx_send_hif_msg_open,
 317         .release = wfx_send_hif_msg_release,
 318         .write = wfx_send_hif_msg_write,
 319         .read = wfx_send_hif_msg_read,
 320 };
 321
 322 static int wfx_ps_timeout_set(void *data, u64 val)
 323 {
 324         struct wfx_dev *wdev = (struct wfx_dev *)data;
 325         struct wfx_vif *wvif;
 326
 327         wdev->force_ps_timeout = val;
 328         wvif = NULL;
 329         while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
 330                 wfx_update_pm(wvif);
 331         return 0;
 332 }
 333
 334 static int wfx_ps_timeout_get(void *data, u64 *val)
 335 {
 336         struct wfx_dev *wdev = (struct wfx_dev *)data;
 337
 338         *val = wdev->force_ps_timeout;
 339         return 0;
 340 }
 341
 342 DEFINE_DEBUGFS_ATTRIBUTE(wfx_ps_timeout_fops, wfx_ps_timeout_get, wfx_ps_timeout_set, "%lld\n");
 343
 344 int wfx_debug_init(struct wfx_dev *wdev)
 345 {
 346         struct dentry *d;
 347
 348         d = debugfs_create_dir("wfx", wdev->hw->wiphy->debugfsdir);
 349         debugfs_create_file("counters", 0444, d, wdev, &wfx_counters_fops);
 350         debugfs_create_file("rx_stats", 0444, d, wdev, &wfx_rx_stats_fops);
 351         debugfs_create_file("tx_power_loop", 0444, d, wdev,
 352                             &wfx_tx_power_loop_fops);
 353         debugfs_create_file("send_pds", 0200, d, wdev, &wfx_send_pds_fops);
 354         debugfs_create_file("send_hif_msg", 0600, d, wdev,
 355                             &wfx_send_hif_msg_fops);
 356         debugfs_create_file("ps_timeout", 0600, d, wdev, &wfx_ps_timeout_fops);
 357
 358         return 0;
 359 }