Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/scsi/mpt3sas/mpt3sas_debugfs.c b/drivers/scsi/mpt3sas/mpt3sas_debugfs.c
new file mode 100644
index 000000000..a6ab1db81
--- /dev/null
+++ b/drivers/scsi/mpt3sas/mpt3sas_debugfs.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Debugfs interface Support for MPT (Message Passing Technology) based
+ * controllers.
+ *
+ * Copyright (C) 2020  Broadcom Inc.
+ *
+ * Authors: Broadcom Inc.
+ * Sreekanth Reddy  <sreekanth.reddy@broadcom.com>
+ * Suganath Prabu <suganath-prabu.subramani@broadcom.com>
+ *
+ * Send feedback to : MPT-FusionLinux.pdl@broadcom.com)
+ *
+ **/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/compat.h>
+#include <linux/uio.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include "mpt3sas_base.h"
+#include <linux/debugfs.h>
+
+static struct dentry *mpt3sas_debugfs_root;
+
+/*
+ * _debugfs_iocdump_read - copy ioc dump from debugfs buffer
+ * @filep:	File Pointer
+ * @ubuf:	Buffer to fill data
+ * @cnt:	Length of the buffer
+ * @ppos:	Offset in the file
+ */
+
+static ssize_t
+_debugfs_iocdump_read(struct file *filp, char __user *ubuf, size_t cnt,
+	loff_t *ppos)
+
+{
+	struct mpt3sas_debugfs_buffer *debug = filp->private_data;
+
+	if (!debug || !debug->buf)
+		return 0;
+
+	return simple_read_from_buffer(ubuf, cnt, ppos, debug->buf, debug->len);
+}
+
+/*
+ * _debugfs_iocdump_open :	open the ioc_dump debugfs attribute file
+ */
+static int
+_debugfs_iocdump_open(struct inode *inode, struct file *file)
+{
+	struct MPT3SAS_ADAPTER *ioc = inode->i_private;
+	struct mpt3sas_debugfs_buffer *debug;
+
+	debug = kzalloc(sizeof(struct mpt3sas_debugfs_buffer), GFP_KERNEL);
+	if (!debug)
+		return -ENOMEM;
+
+	debug->buf = (void *)ioc;
+	debug->len = sizeof(struct MPT3SAS_ADAPTER);
+	file->private_data = debug;
+	return 0;
+}
+
+/*
+ * _debugfs_iocdump_release :	release the ioc_dump debugfs attribute
+ * @inode: inode structure to the corresponds device
+ * @file: File pointer
+ */
+static int
+_debugfs_iocdump_release(struct inode *inode, struct file *file)
+{
+	struct mpt3sas_debugfs_buffer *debug = file->private_data;
+
+	if (!debug)
+		return 0;
+
+	file->private_data = NULL;
+	kfree(debug);
+	return 0;
+}
+
+static const struct file_operations mpt3sas_debugfs_iocdump_fops = {
+	.owner		= THIS_MODULE,
+	.open           = _debugfs_iocdump_open,
+	.read           = _debugfs_iocdump_read,
+	.release        = _debugfs_iocdump_release,
+};
+
+/*
+ * mpt3sas_init_debugfs :	Create debugfs root for mpt3sas driver
+ */
+void mpt3sas_init_debugfs(void)
+{
+	mpt3sas_debugfs_root = debugfs_create_dir("mpt3sas", NULL);
+	if (!mpt3sas_debugfs_root)
+		pr_info("mpt3sas: Cannot create debugfs root\n");
+}
+
+/*
+ * mpt3sas_exit_debugfs :	Remove debugfs root for mpt3sas driver
+ */
+void mpt3sas_exit_debugfs(void)
+{
+	debugfs_remove_recursive(mpt3sas_debugfs_root);
+}
+
+/*
+ * mpt3sas_setup_debugfs :	Setup debugfs per HBA adapter
+ * ioc:				MPT3SAS_ADAPTER object
+ */
+void
+mpt3sas_setup_debugfs(struct MPT3SAS_ADAPTER *ioc)
+{
+	char name[64];
+
+	snprintf(name, sizeof(name), "scsi_host%d", ioc->shost->host_no);
+	if (!ioc->debugfs_root) {
+		ioc->debugfs_root =
+		    debugfs_create_dir(name, mpt3sas_debugfs_root);
+		if (!ioc->debugfs_root) {
+			dev_err(&ioc->pdev->dev,
+			    "Cannot create per adapter debugfs directory\n");
+			return;
+		}
+	}
+
+	snprintf(name, sizeof(name), "ioc_dump");
+	ioc->ioc_dump =	debugfs_create_file(name, 0444,
+	    ioc->debugfs_root, ioc, &mpt3sas_debugfs_iocdump_fops);
+	if (!ioc->ioc_dump) {
+		dev_err(&ioc->pdev->dev,
+		    "Cannot create ioc_dump debugfs file\n");
+		debugfs_remove(ioc->debugfs_root);
+		return;
+	}
+
+	snprintf(name, sizeof(name), "host_recovery");
+	debugfs_create_u8(name, 0444, ioc->debugfs_root, &ioc->shost_recovery);
+
+}
+
+/*
+ * mpt3sas_destroy_debugfs :	Destroy debugfs per HBA adapter
+ * @ioc:	MPT3SAS_ADAPTER object
+ */
+void mpt3sas_destroy_debugfs(struct MPT3SAS_ADAPTER *ioc)
+{
+	debugfs_remove_recursive(ioc->debugfs_root);
+}
+