drivers/usb/host/whci/debug.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Wireless Host Controller (WHC) debug.
   4  *
   5  * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
   6  */
   7 #include <linux/slab.h>
   8 #include <linux/kernel.h>
   9 #include <linux/debugfs.h>
  10 #include <linux/seq_file.h>
  11 #include <linux/export.h>
  12
  13 #include "../../wusbcore/wusbhc.h"
  14
  15 #include "whcd.h"
  16
  17 struct whc_dbg {
  18         struct dentry *di_f;
  19         struct dentry *asl_f;
  20         struct dentry *pzl_f;
  21 };
  22
  23 static void qset_print(struct seq_file *s, struct whc_qset *qset)
  24 {
  25         static const char *qh_type[] = {
  26                 "ctrl", "isoc", "bulk", "intr", "rsvd", "rsvd", "rsvd", "lpintr", };
  27         struct whc_std *std;
  28         struct urb *urb = NULL;
  29         int i;
  30
  31         seq_printf(s, "qset %08x", (u32)qset->qset_dma);
  32         if (&qset->list_node == qset->whc->async_list.prev) {
  33                 seq_printf(s, " (dummy)\n");
  34         } else {
  35                 seq_printf(s, " ep%d%s-%s maxpkt: %d\n",
  36                            qset->qh.info1 & 0x0f,
  37                            (qset->qh.info1 >> 4) & 0x1 ? "in" : "out",
  38                            qh_type[(qset->qh.info1 >> 5) & 0x7],
  39                            (qset->qh.info1 >> 16) & 0xffff);
  40         }
  41         seq_printf(s, "  -> %08x\n", (u32)qset->qh.link);
  42         seq_printf(s, "  info: %08x %08x %08x\n",
  43                    qset->qh.info1, qset->qh.info2,  qset->qh.info3);
  44         seq_printf(s, "  sts: %04x errs: %d curwin: %08x\n",
  45                    qset->qh.status, qset->qh.err_count, qset->qh.cur_window);
  46         seq_printf(s, "  TD: sts: %08x opts: %08x\n",
  47                    qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
  48
  49         for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
  50                 seq_printf(s, "  %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
  51                         i == qset->td_start ? 'S' : ' ',
  52                         i == qset->td_end ? 'E' : ' ',
  53                         i, qset->qtd[i].status, qset->qtd[i].options,
  54                         (u32)qset->qtd[i].page_list_ptr);
  55         }
  56         seq_printf(s, "  ntds: %d\n", qset->ntds);
  57         list_for_each_entry(std, &qset->stds, list_node) {
  58                 if (urb != std->urb) {
  59                         urb = std->urb;
  60                         seq_printf(s, "  urb %p transferred: %d bytes\n", urb,
  61                                 urb->actual_length);
  62                 }
  63                 if (std->qtd)
  64                         seq_printf(s, "    sTD[%td]: %zu bytes @ %08x\n",
  65                                 std->qtd - &qset->qtd[0],
  66                                 std->len, std->num_pointers ?
  67                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  68                 else
  69                         seq_printf(s, "    sTD[-]: %zd bytes @ %08x\n",
  70                                 std->len, std->num_pointers ?
  71                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  72         }
  73 }
  74
  75 static int di_show(struct seq_file *s, void *p)
  76 {
  77         struct whc *whc = s->private;
  78         int d;
  79
  80         for (d = 0; d < whc->n_devices; d++) {
  81                 struct di_buf_entry *di = &whc->di_buf[d];
  82
  83                 seq_printf(s, "DI[%d]\n", d);
  84                 seq_printf(s, "  availability: %*pb\n",
  85                            UWB_NUM_MAS, (unsigned long *)di->availability_info);
  86                 seq_printf(s, "  %c%c key idx: %d dev addr: %d\n",
  87                            (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
  88                            (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
  89                            (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
  90                            (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
  91         }
  92         return 0;
  93 }
  94 DEFINE_SHOW_ATTRIBUTE(di);
  95
  96 static int asl_show(struct seq_file *s, void *p)
  97 {
  98         struct whc *whc = s->private;
  99         struct whc_qset *qset;
 100
 101         list_for_each_entry(qset, &whc->async_list, list_node) {
 102                 qset_print(s, qset);
 103         }
 104
 105         return 0;
 106 }
 107 DEFINE_SHOW_ATTRIBUTE(asl);
 108
 109 static int pzl_show(struct seq_file *s, void *p)
 110 {
 111         struct whc *whc = s->private;
 112         struct whc_qset *qset;
 113         int period;
 114
 115         for (period = 0; period < 5; period++) {
 116                 seq_printf(s, "Period %d\n", period);
 117                 list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
 118                         qset_print(s, qset);
 119                 }
 120         }
 121         return 0;
 122 }
 123 DEFINE_SHOW_ATTRIBUTE(pzl);
 124
 125 void whc_dbg_init(struct whc *whc)
 126 {
 127         if (whc->wusbhc.pal.debugfs_dir == NULL)
 128                 return;
 129
 130         whc->dbg = kzalloc(sizeof(struct whc_dbg), GFP_KERNEL);
 131         if (whc->dbg == NULL)
 132                 return;
 133
 134         whc->dbg->di_f = debugfs_create_file("di", 0444,
 135                                               whc->wusbhc.pal.debugfs_dir, whc,
 136                                               &di_fops);
 137         whc->dbg->asl_f = debugfs_create_file("asl", 0444,
 138                                               whc->wusbhc.pal.debugfs_dir, whc,
 139                                               &asl_fops);
 140         whc->dbg->pzl_f = debugfs_create_file("pzl", 0444,
 141                                               whc->wusbhc.pal.debugfs_dir, whc,
 142                                               &pzl_fops);
 143 }
 144
 145 void whc_dbg_clean_up(struct whc *whc)
 146 {
 147         if (whc->dbg) {
 148                 debugfs_remove(whc->dbg->pzl_f);
 149                 debugfs_remove(whc->dbg->asl_f);
 150                 debugfs_remove(whc->dbg->di_f);
 151                 kfree(whc->dbg);
 152         }
 153 }