Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/scsi/mpt3sas/mpt3sas_debugfs.c b/drivers/scsi/mpt3sas/mpt3sas_debugfs.c
new file mode 100644
index 0000000..a6ab1db
--- /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);
+}
+