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673 lines
15 KiB
673 lines
15 KiB
/*
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* Debugfs support for hosts and cards
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/moduleparam.h>
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#include <linux/export.h>
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#include <linux/debugfs.h>
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#include <linux/fs.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/fault-inject.h>
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#include <linux/uaccess.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include "core.h"
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#include "card.h"
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#include "host.h"
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#include "mmc_ops.h"
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#ifdef CONFIG_FAIL_MMC_REQUEST
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static DECLARE_FAULT_ATTR(fail_default_attr);
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static char *fail_request;
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module_param(fail_request, charp, 0);
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#endif /* CONFIG_FAIL_MMC_REQUEST */
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/* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
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static int mmc_ring_buffer_show(struct seq_file *s, void *data)
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{
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struct mmc_host *mmc = s->private;
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mmc_dump_trace_buffer(mmc, s);
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return 0;
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}
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static int mmc_ring_buffer_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mmc_ring_buffer_show, inode->i_private);
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}
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static const struct file_operations mmc_ring_buffer_fops = {
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.open = mmc_ring_buffer_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int mmc_ios_show(struct seq_file *s, void *data)
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{
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static const char *vdd_str[] = {
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[8] = "2.0",
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[9] = "2.1",
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[10] = "2.2",
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[11] = "2.3",
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[12] = "2.4",
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[13] = "2.5",
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[14] = "2.6",
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[15] = "2.7",
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[16] = "2.8",
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[17] = "2.9",
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[18] = "3.0",
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[19] = "3.1",
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[20] = "3.2",
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[21] = "3.3",
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[22] = "3.4",
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[23] = "3.5",
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[24] = "3.6",
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};
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struct mmc_host *host = s->private;
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struct mmc_ios *ios = &host->ios;
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const char *str;
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seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
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if (host->actual_clock)
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seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
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seq_printf(s, "vdd:\t\t%u ", ios->vdd);
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if ((1 << ios->vdd) & MMC_VDD_165_195)
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seq_printf(s, "(1.65 - 1.95 V)\n");
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else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
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&& vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
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seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
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vdd_str[ios->vdd + 1]);
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else
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seq_printf(s, "(invalid)\n");
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switch (ios->bus_mode) {
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case MMC_BUSMODE_OPENDRAIN:
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str = "open drain";
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break;
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case MMC_BUSMODE_PUSHPULL:
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str = "push-pull";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
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switch (ios->chip_select) {
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case MMC_CS_DONTCARE:
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str = "don't care";
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break;
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case MMC_CS_HIGH:
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str = "active high";
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break;
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case MMC_CS_LOW:
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str = "active low";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
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switch (ios->power_mode) {
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case MMC_POWER_OFF:
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str = "off";
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break;
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case MMC_POWER_UP:
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str = "up";
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break;
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case MMC_POWER_ON:
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str = "on";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
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seq_printf(s, "bus width:\t%u (%u bits)\n",
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ios->bus_width, 1 << ios->bus_width);
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switch (ios->timing) {
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case MMC_TIMING_LEGACY:
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str = "legacy";
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break;
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case MMC_TIMING_MMC_HS:
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str = "mmc high-speed";
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break;
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case MMC_TIMING_SD_HS:
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str = "sd high-speed";
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break;
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case MMC_TIMING_UHS_SDR12:
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str = "sd uhs SDR12";
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break;
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case MMC_TIMING_UHS_SDR25:
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str = "sd uhs SDR25";
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break;
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case MMC_TIMING_UHS_SDR50:
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str = "sd uhs SDR50";
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break;
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case MMC_TIMING_UHS_SDR104:
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str = "sd uhs SDR104";
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break;
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case MMC_TIMING_UHS_DDR50:
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str = "sd uhs DDR50";
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break;
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case MMC_TIMING_MMC_DDR52:
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str = "mmc DDR52";
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break;
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case MMC_TIMING_MMC_HS200:
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str = "mmc HS200";
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break;
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case MMC_TIMING_MMC_HS400:
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str = mmc_card_hs400es(host->card) ?
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"mmc HS400 enhanced strobe" : "mmc HS400";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
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switch (ios->signal_voltage) {
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case MMC_SIGNAL_VOLTAGE_330:
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str = "3.30 V";
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break;
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case MMC_SIGNAL_VOLTAGE_180:
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str = "1.80 V";
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break;
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case MMC_SIGNAL_VOLTAGE_120:
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str = "1.20 V";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
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switch (ios->drv_type) {
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case MMC_SET_DRIVER_TYPE_A:
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str = "driver type A";
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break;
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case MMC_SET_DRIVER_TYPE_B:
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str = "driver type B";
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break;
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case MMC_SET_DRIVER_TYPE_C:
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str = "driver type C";
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break;
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case MMC_SET_DRIVER_TYPE_D:
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str = "driver type D";
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break;
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default:
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str = "invalid";
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break;
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}
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seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
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return 0;
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}
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static int mmc_ios_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mmc_ios_show, inode->i_private);
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}
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static const struct file_operations mmc_ios_fops = {
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.open = mmc_ios_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int mmc_clock_opt_get(void *data, u64 *val)
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{
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struct mmc_host *host = data;
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*val = host->ios.clock;
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return 0;
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}
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static int mmc_clock_opt_set(void *data, u64 val)
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{
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struct mmc_host *host = data;
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/* We need this check due to input value is u64 */
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if (val != 0 && (val > host->f_max || val < host->f_min))
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return -EINVAL;
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mmc_claim_host(host);
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mmc_set_clock(host, (unsigned int) val);
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mmc_release_host(host);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
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"%llu\n");
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#include <linux/delay.h>
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static int mmc_scale_get(void *data, u64 *val)
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{
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struct mmc_host *host = data;
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*val = host->clk_scaling.curr_freq;
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return 0;
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}
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static int mmc_scale_set(void *data, u64 val)
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{
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int err = 0;
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struct mmc_host *host = data;
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mmc_claim_host(host);
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mmc_host_clk_hold(host);
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/* change frequency from sysfs manually */
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err = mmc_clk_update_freq(host, val, host->clk_scaling.state);
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if (err == -EAGAIN)
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err = 0;
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else if (err)
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pr_err("%s: clock scale to %llu failed with error %d\n",
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mmc_hostname(host), val, err);
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else
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pr_debug("%s: clock change to %llu finished successfully (%s)\n",
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mmc_hostname(host), val, current->comm);
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mmc_host_clk_release(host);
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mmc_release_host(host);
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return err;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mmc_scale_fops, mmc_scale_get, mmc_scale_set,
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"%llu\n");
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static int mmc_max_clock_get(void *data, u64 *val)
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{
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struct mmc_host *host = data;
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if (!host)
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return -EINVAL;
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*val = host->f_max;
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return 0;
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}
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static int mmc_max_clock_set(void *data, u64 val)
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{
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struct mmc_host *host = data;
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int err = -EINVAL;
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unsigned long freq = val;
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unsigned int old_freq;
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if (!host || (val < host->f_min))
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goto out;
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mmc_claim_host(host);
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if (host->bus_ops && host->bus_ops->change_bus_speed) {
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old_freq = host->f_max;
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host->f_max = freq;
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err = host->bus_ops->change_bus_speed(host, &freq);
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if (err)
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host->f_max = old_freq;
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}
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mmc_release_host(host);
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out:
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return err;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mmc_max_clock_fops, mmc_max_clock_get,
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mmc_max_clock_set, "%llu\n");
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static int mmc_force_err_set(void *data, u64 val)
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{
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struct mmc_host *host = data;
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if (host && host->card && host->ops &&
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host->ops->force_err_irq) {
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/*
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* To access the force error irq reg, we need to make
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* sure the host is powered up and host clock is ticking.
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*/
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mmc_get_card(host->card);
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host->ops->force_err_irq(host, val);
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mmc_put_card(host->card);
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}
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mmc_force_err_fops, NULL, mmc_force_err_set, "%llu\n");
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static int mmc_err_state_get(void *data, u64 *val)
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{
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struct mmc_host *host = data;
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if (!host)
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return -EINVAL;
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*val = host->err_occurred ? 1 : 0;
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return 0;
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}
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static int mmc_err_state_clear(void *data, u64 val)
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{
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struct mmc_host *host = data;
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if (!host)
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return -EINVAL;
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host->err_occurred = false;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(mmc_err_state, mmc_err_state_get,
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mmc_err_state_clear, "%llu\n");
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static int mmc_err_stats_show(struct seq_file *file, void *data)
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{
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struct mmc_host *host = (struct mmc_host *)file->private;
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if (!host)
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return -EINVAL;
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seq_printf(file, "# Command Timeout Occurred:\t %d\n",
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host->err_stats[MMC_ERR_CMD_TIMEOUT]);
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seq_printf(file, "# Command CRC Errors Occurred:\t %d\n",
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host->err_stats[MMC_ERR_CMD_CRC]);
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seq_printf(file, "# Data Timeout Occurred:\t %d\n",
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host->err_stats[MMC_ERR_DAT_TIMEOUT]);
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seq_printf(file, "# Data CRC Errors Occurred:\t %d\n",
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host->err_stats[MMC_ERR_DAT_CRC]);
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seq_printf(file, "# Auto-Cmd Error Occurred:\t %d\n",
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host->err_stats[MMC_ERR_ADMA]);
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seq_printf(file, "# ADMA Error Occurred:\t %d\n",
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host->err_stats[MMC_ERR_ADMA]);
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seq_printf(file, "# Tuning Error Occurred:\t %d\n",
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host->err_stats[MMC_ERR_TUNING]);
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seq_printf(file, "# CMDQ RED Errors:\t\t %d\n",
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host->err_stats[MMC_ERR_CMDQ_RED]);
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seq_printf(file, "# CMDQ GCE Errors:\t\t %d\n",
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host->err_stats[MMC_ERR_CMDQ_GCE]);
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seq_printf(file, "# CMDQ ICCE Errors:\t\t %d\n",
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host->err_stats[MMC_ERR_CMDQ_ICCE]);
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seq_printf(file, "# Request Timedout:\t %d\n",
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host->err_stats[MMC_ERR_REQ_TIMEOUT]);
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seq_printf(file, "# CMDQ Request Timedout:\t %d\n",
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host->err_stats[MMC_ERR_CMDQ_REQ_TIMEOUT]);
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seq_printf(file, "# ICE Config Errors:\t\t %d\n",
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host->err_stats[MMC_ERR_ICE_CFG]);
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return 0;
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}
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static int mmc_err_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mmc_err_stats_show, inode->i_private);
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}
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static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mmc_host *host = filp->f_mapping->host->i_private;
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if (!host)
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return -EINVAL;
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pr_debug("%s: Resetting MMC error statistics", __func__);
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memset(host->err_stats, 0, sizeof(host->err_stats));
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return cnt;
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}
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static const struct file_operations mmc_err_stats_fops = {
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.open = mmc_err_stats_open,
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.read = seq_read,
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.write = mmc_err_stats_write,
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};
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void mmc_add_host_debugfs(struct mmc_host *host)
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{
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struct dentry *root;
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root = debugfs_create_dir(mmc_hostname(host), NULL);
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if (IS_ERR(root))
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/* Don't complain -- debugfs just isn't enabled */
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return;
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if (!root)
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/* Complain -- debugfs is enabled, but it failed to
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* create the directory. */
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goto err_root;
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host->debugfs_root = root;
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if (!debugfs_create_file("ios", 0400, root, host, &mmc_ios_fops))
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goto err_node;
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if (!debugfs_create_file("clock", 0600, root, host,
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&mmc_clock_fops))
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goto err_node;
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if (!debugfs_create_file("max_clock", 0600, root, host,
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&mmc_max_clock_fops))
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goto err_node;
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if (!debugfs_create_file("scale", 0600, root, host,
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&mmc_scale_fops))
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goto err_node;
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if (!debugfs_create_bool("skip_clk_scale_freq_update",
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0600, root,
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&host->clk_scaling.skip_clk_scale_freq_update))
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goto err_node;
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if (!debugfs_create_bool("cmdq_task_history",
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0600, root,
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&host->cmdq_thist_enabled))
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goto err_node;
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if (!debugfs_create_bool("crash_on_err",
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0600, root,
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&host->crash_on_err))
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goto err_node;
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#ifdef CONFIG_MMC_RING_BUFFER
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if (!debugfs_create_file("ring_buffer", 0400,
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root, host, &mmc_ring_buffer_fops))
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goto err_node;
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#endif
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if (!debugfs_create_file("err_state", 0600, root, host,
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&mmc_err_state))
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goto err_node;
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if (!debugfs_create_file("err_stats", 0600, root, host,
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&mmc_err_stats_fops))
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goto err_node;
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#ifdef CONFIG_MMC_CLKGATE
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if (!debugfs_create_u32("clk_delay", 0600,
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root, &host->clk_delay))
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goto err_node;
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#endif
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#ifdef CONFIG_FAIL_MMC_REQUEST
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if (fail_request)
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setup_fault_attr(&fail_default_attr, fail_request);
|
|
host->fail_mmc_request = fail_default_attr;
|
|
if (IS_ERR(fault_create_debugfs_attr("fail_mmc_request",
|
|
root,
|
|
&host->fail_mmc_request)))
|
|
goto err_node;
|
|
#endif
|
|
if (!debugfs_create_file("force_error", 0200, root, host,
|
|
&mmc_force_err_fops))
|
|
goto err_node;
|
|
|
|
return;
|
|
|
|
err_node:
|
|
debugfs_remove_recursive(root);
|
|
host->debugfs_root = NULL;
|
|
err_root:
|
|
dev_err(&host->class_dev, "failed to initialize debugfs\n");
|
|
}
|
|
|
|
void mmc_remove_host_debugfs(struct mmc_host *host)
|
|
{
|
|
debugfs_remove_recursive(host->debugfs_root);
|
|
}
|
|
|
|
static int mmc_bkops_stats_read(struct seq_file *file, void *data)
|
|
{
|
|
struct mmc_card *card = file->private;
|
|
struct mmc_bkops_stats *stats;
|
|
int i;
|
|
|
|
if (!card)
|
|
return -EINVAL;
|
|
|
|
stats = &card->bkops.stats;
|
|
|
|
if (!stats->enabled) {
|
|
pr_info("%s: bkops statistics are disabled\n",
|
|
mmc_hostname(card->host));
|
|
goto exit;
|
|
}
|
|
|
|
spin_lock(&stats->lock);
|
|
|
|
seq_printf(file, "%s: bkops statistics:\n",
|
|
mmc_hostname(card->host));
|
|
seq_printf(file, "%s: BKOPS: sent START_BKOPS to device: %u\n",
|
|
mmc_hostname(card->host), stats->manual_start);
|
|
seq_printf(file, "%s: BKOPS: stopped due to HPI: %u\n",
|
|
mmc_hostname(card->host), stats->hpi);
|
|
seq_printf(file, "%s: BKOPS: sent AUTO_EN set to 1: %u\n",
|
|
mmc_hostname(card->host), stats->auto_start);
|
|
seq_printf(file, "%s: BKOPS: sent AUTO_EN set to 0: %u\n",
|
|
mmc_hostname(card->host), stats->auto_stop);
|
|
|
|
for (i = 0 ; i < MMC_BKOPS_NUM_SEVERITY_LEVELS ; ++i)
|
|
seq_printf(file, "%s: BKOPS: due to level %d: %u\n",
|
|
mmc_hostname(card->host), i, stats->level[i]);
|
|
|
|
spin_unlock(&stats->lock);
|
|
|
|
exit:
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t mmc_bkops_stats_write(struct file *filp,
|
|
const char __user *ubuf, size_t cnt,
|
|
loff_t *ppos)
|
|
{
|
|
struct mmc_card *card = filp->f_mapping->host->i_private;
|
|
int value;
|
|
struct mmc_bkops_stats *stats;
|
|
int err;
|
|
|
|
if (!card)
|
|
return cnt;
|
|
|
|
stats = &card->bkops.stats;
|
|
|
|
err = kstrtoint_from_user(ubuf, cnt, 0, &value);
|
|
if (err) {
|
|
pr_err("%s: %s: error parsing input from user (%d)\n",
|
|
mmc_hostname(card->host), __func__, err);
|
|
return err;
|
|
}
|
|
if (value) {
|
|
mmc_blk_init_bkops_statistics(card);
|
|
} else {
|
|
spin_lock(&stats->lock);
|
|
stats->enabled = false;
|
|
spin_unlock(&stats->lock);
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
|
|
static int mmc_bkops_stats_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, mmc_bkops_stats_read, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations mmc_dbg_bkops_stats_fops = {
|
|
.open = mmc_bkops_stats_open,
|
|
.read = seq_read,
|
|
.write = mmc_bkops_stats_write,
|
|
};
|
|
|
|
void mmc_add_card_debugfs(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
struct dentry *root;
|
|
|
|
if (!host->debugfs_root)
|
|
return;
|
|
|
|
root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
|
|
if (IS_ERR(root))
|
|
/* Don't complain -- debugfs just isn't enabled */
|
|
return;
|
|
if (!root)
|
|
/* Complain -- debugfs is enabled, but it failed to
|
|
* create the directory. */
|
|
goto err;
|
|
|
|
card->debugfs_root = root;
|
|
|
|
if (!debugfs_create_x32("state", 0400, root, &card->state))
|
|
goto err;
|
|
|
|
if (mmc_card_mmc(card) && (card->ext_csd.rev >= 5) &&
|
|
(mmc_card_configured_auto_bkops(card) ||
|
|
mmc_card_configured_manual_bkops(card)))
|
|
if (!debugfs_create_file("bkops_stats", 0400, root, card,
|
|
&mmc_dbg_bkops_stats_fops))
|
|
goto err;
|
|
|
|
return;
|
|
|
|
err:
|
|
debugfs_remove_recursive(root);
|
|
card->debugfs_root = NULL;
|
|
dev_err(&card->dev, "failed to initialize debugfs\n");
|
|
}
|
|
|
|
void mmc_remove_card_debugfs(struct mmc_card *card)
|
|
{
|
|
debugfs_remove_recursive(card->debugfs_root);
|
|
card->debugfs_root = NULL;
|
|
}
|
|
|