1 files changed, 171 insertions, 146 deletions

diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 54829c0ed000..91ea00a0f61d 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Debugfs support for hosts and cards
  *
  * Copyright (C) 2008 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/moduleparam.h>
 #include <linux/export.h>
@@ -15,11 +12,16 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/fault-inject.h>
+#include <linux/time.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
 
 #include "core.h"
+#include "card.h"
+#include "host.h"
 #include "mmc_ops.h"
 
 #ifdef CONFIG_FAIL_MMC_REQUEST
@@ -27,6 +29,7 @@
 static DECLARE_FAULT_ATTR(fail_default_attr);
 static char *fail_request;
 module_param(fail_request, charp, 0);
+MODULE_PARM_DESC(fail_request, "default fault injection attributes");
 
 #endif /* CONFIG_FAIL_MMC_REQUEST */
 
@@ -126,6 +129,12 @@ static int mmc_ios_show(struct seq_file *s, void *data)
 	case MMC_TIMING_SD_HS:
 		str = "sd high-speed";
 		break;
+	case MMC_TIMING_UHS_SDR12:
+		str = "sd uhs SDR12";
+		break;
+	case MMC_TIMING_UHS_SDR25:
+		str = "sd uhs SDR25";
+		break;
 	case MMC_TIMING_UHS_SDR50:
 		str = "sd uhs SDR50";
 		break;
@@ -135,8 +144,15 @@ static int mmc_ios_show(struct seq_file *s, void *data)
 	case MMC_TIMING_UHS_DDR50:
 		str = "sd uhs DDR50";
 		break;
+	case MMC_TIMING_MMC_DDR52:
+		str = "mmc DDR52";
+		break;
 	case MMC_TIMING_MMC_HS200:
-		str = "mmc high-speed SDR200";
+		str = "mmc HS200";
+		break;
+	case MMC_TIMING_MMC_HS400:
+		str = mmc_card_hs400es(host->card) ?
+			"mmc HS400 enhanced strobe" : "mmc HS400";
 		break;
 	default:
 		str = "invalid";
@@ -158,22 +174,30 @@ static int mmc_ios_show(struct seq_file *s, void *data)
 		str = "invalid";
 		break;
 	}
-	seq_printf(s, "signal voltage:\t%u (%s)\n", ios->chip_select, str);
+	seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
 
-	return 0;
-}
+	switch (ios->drv_type) {
+	case MMC_SET_DRIVER_TYPE_A:
+		str = "driver type A";
+		break;
+	case MMC_SET_DRIVER_TYPE_B:
+		str = "driver type B";
+		break;
+	case MMC_SET_DRIVER_TYPE_C:
+		str = "driver type C";
+		break;
+	case MMC_SET_DRIVER_TYPE_D:
+		str = "driver type D";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
 
-static int mmc_ios_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, mmc_ios_show, inode->i_private);
+	return 0;
 }
-
-static const struct file_operations mmc_ios_fops = {
-	.open		= mmc_ios_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(mmc_ios);
 
 static int mmc_clock_opt_get(void *data, u64 *val)
 {
@@ -189,7 +213,7 @@ static int mmc_clock_opt_set(void *data, u64 val)
 	struct mmc_host *host = data;
 
 	/* We need this check due to input value is u64 */
-	if (val > host->f_max)
+	if (val != 0 && (val > host->f_max || val < host->f_min))
 		return -EINVAL;
 
 	mmc_claim_host(host);
@@ -199,140 +223,165 @@ static int mmc_clock_opt_set(void *data, u64 val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
 	"%llu\n");
 
-void mmc_add_host_debugfs(struct mmc_host *host)
+static int mmc_err_state_get(void *data, u64 *val)
 {
-	struct dentry *root;
+	struct mmc_host *host = data;
+	int i;
 
-	root = debugfs_create_dir(mmc_hostname(host), NULL);
-	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_root;
+	if (!host)
+		return -EINVAL;
 
-	host->debugfs_root = root;
+	*val = 0;
+	for (i = 0; i < MMC_ERR_MAX; i++) {
+		if (host->err_stats[i]) {
+			*val = 1;
+			break;
+		}
+	}
 
-	if (!debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops))
-		goto err_node;
+	return 0;
+}
 
-	if (!debugfs_create_file("clock", S_IRUSR | S_IWUSR, root, host,
-			&mmc_clock_fops))
-		goto err_node;
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n");
 
-#ifdef CONFIG_MMC_CLKGATE
-	if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR),
-				root, &host->clk_delay))
-		goto err_node;
-#endif
-#ifdef CONFIG_FAIL_MMC_REQUEST
-	if (fail_request)
-		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
-	return;
+static int mmc_err_stats_show(struct seq_file *file, void *data)
+{
+	struct mmc_host *host = file->private;
+	const char *desc[MMC_ERR_MAX] = {
+		[MMC_ERR_CMD_TIMEOUT] = "Command Timeout Occurred",
+		[MMC_ERR_CMD_CRC] = "Command CRC Errors Occurred",
+		[MMC_ERR_DAT_TIMEOUT] = "Data Timeout Occurred",
+		[MMC_ERR_DAT_CRC] = "Data CRC Errors Occurred",
+		[MMC_ERR_AUTO_CMD] = "Auto-Cmd Error Occurred",
+		[MMC_ERR_ADMA] = "ADMA Error Occurred",
+		[MMC_ERR_TUNING] = "Tuning Error Occurred",
+		[MMC_ERR_CMDQ_RED] = "CMDQ RED Errors",
+		[MMC_ERR_CMDQ_GCE] = "CMDQ GCE Errors",
+		[MMC_ERR_CMDQ_ICCE] = "CMDQ ICCE Errors",
+		[MMC_ERR_REQ_TIMEOUT] = "Request Timedout",
+		[MMC_ERR_CMDQ_REQ_TIMEOUT] = "CMDQ Request Timedout",
+		[MMC_ERR_ICE_CFG] = "ICE Config Errors",
+		[MMC_ERR_CTRL_TIMEOUT] = "Controller Timedout errors",
+		[MMC_ERR_UNEXPECTED_IRQ] = "Unexpected IRQ errors",
+	};
+	int i;
+
+	for (i = 0; i < MMC_ERR_MAX; i++) {
+		if (desc[i])
+			seq_printf(file, "# %s:\t %d\n",
+					desc[i], host->err_stats[i]);
+	}
 
-err_node:
-	debugfs_remove_recursive(root);
-	host->debugfs_root = NULL;
-err_root:
-	dev_err(&host->class_dev, "failed to initialize debugfs\n");
+	return 0;
 }
 
-void mmc_remove_host_debugfs(struct mmc_host *host)
+static int mmc_err_stats_open(struct inode *inode, struct file *file)
 {
-	debugfs_remove_recursive(host->debugfs_root);
+	return single_open(file, mmc_err_stats_show, inode->i_private);
 }
 
-static int mmc_dbg_card_status_get(void *data, u64 *val)
+static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf,
+				   size_t cnt, loff_t *ppos)
 {
-	struct mmc_card	*card = data;
-	u32		status;
-	int		ret;
-
-	mmc_get_card(card);
-
-	ret = mmc_send_status(data, &status);
-	if (!ret)
-		*val = status;
+	struct mmc_host *host = filp->f_mapping->host->i_private;
 
-	mmc_put_card(card);
+	pr_debug("%s: Resetting MMC error statistics\n", __func__);
+	memset(host->err_stats, 0, sizeof(host->err_stats));
 
-	return ret;
+	return cnt;
 }
-DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
-		NULL, "%08llx\n");
 
-#define EXT_CSD_STR_LEN 1025
+static const struct file_operations mmc_err_stats_fops = {
+	.open	= mmc_err_stats_open,
+	.read	= seq_read,
+	.write	= mmc_err_stats_write,
+	.release = single_release,
+};
 
-static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
+static int mmc_caps_get(void *data, u64 *val)
 {
-	struct mmc_card *card = inode->i_private;
-	char *buf;
-	ssize_t n = 0;
-	u8 *ext_csd;
-	int err, i;
-
-	buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	ext_csd = kmalloc(512, GFP_KERNEL);
-	if (!ext_csd) {
-		err = -ENOMEM;
-		goto out_free;
-	}
+	*val = *(u32 *)data;
+	return 0;
+}
 
-	mmc_get_card(card);
-	err = mmc_send_ext_csd(card, ext_csd);
-	mmc_put_card(card);
-	if (err)
-		goto out_free;
+static int mmc_caps_set(void *data, u64 val)
+{
+	u32 *caps = data;
+	u32 diff = *caps ^ val;
+	u32 allowed = MMC_CAP_AGGRESSIVE_PM |
+		      MMC_CAP_SD_HIGHSPEED |
+		      MMC_CAP_MMC_HIGHSPEED |
+		      MMC_CAP_UHS |
+		      MMC_CAP_DDR |
+		      MMC_CAP_4_BIT_DATA |
+		      MMC_CAP_8_BIT_DATA |
+		      MMC_CAP_CMD23;
+
+	if (diff & ~allowed)
+		return -EINVAL;
 
-	for (i = 0; i < 512; i++)
-		n += sprintf(buf + n, "%02x", ext_csd[i]);
-	n += sprintf(buf + n, "\n");
-	BUG_ON(n != EXT_CSD_STR_LEN);
+	*caps = val;
 
-	filp->private_data = buf;
-	kfree(ext_csd);
 	return 0;
-
-out_free:
-	kfree(buf);
-	kfree(ext_csd);
-	return err;
 }
 
-static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
-				size_t cnt, loff_t *ppos)
+static int mmc_caps2_set(void *data, u64 val)
 {
-	char *buf = filp->private_data;
+	u32 allowed = MMC_CAP2_HSX00_1_8V |
+		      MMC_CAP2_HSX00_1_2V |
+		      MMC_CAP2_CQE |
+		      MMC_CAP2_CQE_DCMD;
+	u32 *caps = data;
+	u32 diff = *caps ^ val;
+
+	if (diff & ~allowed)
+		return -EINVAL;
 
-	return simple_read_from_buffer(ubuf, cnt, ppos,
-				       buf, EXT_CSD_STR_LEN);
+	*caps = val;
+
+	return 0;
 }
 
-static int mmc_ext_csd_release(struct inode *inode, struct file *file)
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps_fops, mmc_caps_get, mmc_caps_set,
+			 "0x%08llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps2_fops, mmc_caps_get, mmc_caps2_set,
+			 "0x%08llx\n");
+
+void mmc_add_host_debugfs(struct mmc_host *host)
 {
-	kfree(file->private_data);
-	return 0;
+	struct dentry *root;
+
+	root = debugfs_create_dir(mmc_hostname(host), NULL);
+	host->debugfs_root = root;
+
+	debugfs_create_file("ios", 0400, root, host, &mmc_ios_fops);
+	debugfs_create_file("caps", 0600, root, &host->caps, &mmc_caps_fops);
+	debugfs_create_file("caps2", 0600, root, &host->caps2,
+			    &mmc_caps2_fops);
+	debugfs_create_file_unsafe("clock", 0600, root, host,
+				   &mmc_clock_fops);
+
+	debugfs_create_file_unsafe("err_state", 0600, root, host,
+			    &mmc_err_state);
+	debugfs_create_file("err_stats", 0600, root, host,
+			    &mmc_err_stats_fops);
+
+#ifdef CONFIG_FAIL_MMC_REQUEST
+	if (fail_request)
+		setup_fault_attr(&fail_default_attr, fail_request);
+	host->fail_mmc_request = fail_default_attr;
+	fault_create_debugfs_attr("fail_mmc_request", root,
+				  &host->fail_mmc_request);
+#endif
 }
 
-static const struct file_operations mmc_dbg_ext_csd_fops = {
-	.open		= mmc_ext_csd_open,
-	.read		= mmc_ext_csd_read,
-	.release	= mmc_ext_csd_release,
-	.llseek		= default_llseek,
-};
+void mmc_remove_host_debugfs(struct mmc_host *host)
+{
+	debugfs_remove_recursive(host->debugfs_root);
+}
 
 void mmc_add_card_debugfs(struct mmc_card *card)
 {
@@ -343,38 +392,14 @@ void mmc_add_card_debugfs(struct mmc_card *card)
 		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", S_IRUSR, root, &card->state))
-		goto err;
-
-	if (mmc_card_mmc(card) || mmc_card_sd(card))
-		if (!debugfs_create_file("status", S_IRUSR, root, card,
-					&mmc_dbg_card_status_fops))
-			goto err;
-
-	if (mmc_card_mmc(card))
-		if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
-					&mmc_dbg_ext_csd_fops))
-			goto err;
-
-	return;
-
-err:
-	debugfs_remove_recursive(root);
-	card->debugfs_root = NULL;
-	dev_err(&card->dev, "failed to initialize debugfs\n");
+	debugfs_create_x32("state", 0400, root, &card->state);
+	debugfs_create_x32("quirks", 0400, root, &card->quirks);
 }
 
 void mmc_remove_card_debugfs(struct mmc_card *card)
 {
 	debugfs_remove_recursive(card->debugfs_root);
+	card->debugfs_root = NULL;
 }