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path: root/drivers/scsi/lpfc/lpfc_debugfs.c
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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_debugfs.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_debugfs.c118
1 files changed, 117 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 8d34be60d379..2e6a68d9ea4f 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -31,6 +31,7 @@
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/ctype.h>
+#include <linux/vmalloc.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
@@ -2078,6 +2079,96 @@ lpfc_debugfs_lockstat_write(struct file *file, const char __user *buf,
}
#endif
+static int lpfc_debugfs_ras_log_data(struct lpfc_hba *phba,
+ char *buffer, int size)
+{
+ int copied = 0;
+ struct lpfc_dmabuf *dmabuf, *next;
+
+ spin_lock_irq(&phba->hbalock);
+ if (phba->ras_fwlog.state != ACTIVE) {
+ spin_unlock_irq(&phba->hbalock);
+ return -EINVAL;
+ }
+ spin_unlock_irq(&phba->hbalock);
+
+ list_for_each_entry_safe(dmabuf, next,
+ &phba->ras_fwlog.fwlog_buff_list, list) {
+ memcpy(buffer + copied, dmabuf->virt, LPFC_RAS_MAX_ENTRY_SIZE);
+ copied += LPFC_RAS_MAX_ENTRY_SIZE;
+ if (size > copied)
+ break;
+ }
+ return copied;
+}
+
+static int
+lpfc_debugfs_ras_log_release(struct inode *inode, struct file *file)
+{
+ struct lpfc_debug *debug = file->private_data;
+
+ vfree(debug->buffer);
+ kfree(debug);
+
+ return 0;
+}
+
+/**
+ * lpfc_debugfs_ras_log_open - Open the RAS log debugfs buffer
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return a negative
+ * error value.
+ **/
+static int
+lpfc_debugfs_ras_log_open(struct inode *inode, struct file *file)
+{
+ struct lpfc_hba *phba = inode->i_private;
+ struct lpfc_debug *debug;
+ int size;
+ int rc = -ENOMEM;
+
+ spin_lock_irq(&phba->hbalock);
+ if (phba->ras_fwlog.state != ACTIVE) {
+ spin_unlock_irq(&phba->hbalock);
+ rc = -EINVAL;
+ goto out;
+ }
+ spin_unlock_irq(&phba->hbalock);
+ debug = kmalloc(sizeof(*debug), GFP_KERNEL);
+ if (!debug)
+ goto out;
+
+ size = LPFC_RAS_MIN_BUFF_POST_SIZE * phba->cfg_ras_fwlog_buffsize;
+ debug->buffer = vmalloc(size);
+ if (!debug->buffer)
+ goto free_debug;
+
+ debug->len = lpfc_debugfs_ras_log_data(phba, debug->buffer, size);
+ if (debug->len < 0) {
+ rc = -EINVAL;
+ goto free_buffer;
+ }
+ file->private_data = debug;
+
+ return 0;
+
+free_buffer:
+ vfree(debug->buffer);
+free_debug:
+ kfree(debug);
+out:
+ return rc;
+}
+
/**
* lpfc_debugfs_dumpHBASlim_open - Open the Dump HBA SLIM debugfs buffer
* @inode: The inode pointer that contains a vport pointer.
@@ -5286,6 +5377,16 @@ static const struct file_operations lpfc_debugfs_op_lockstat = {
};
#endif
+#undef lpfc_debugfs_ras_log
+static const struct file_operations lpfc_debugfs_ras_log = {
+ .owner = THIS_MODULE,
+ .open = lpfc_debugfs_ras_log_open,
+ .llseek = lpfc_debugfs_lseek,
+ .read = lpfc_debugfs_read,
+ .release = lpfc_debugfs_ras_log_release,
+};
+#endif
+
#undef lpfc_debugfs_op_dumpHBASlim
static const struct file_operations lpfc_debugfs_op_dumpHBASlim = {
.owner = THIS_MODULE,
@@ -5457,7 +5558,6 @@ static const struct file_operations lpfc_idiag_op_extAcc = {
.release = lpfc_idiag_cmd_release,
};
-#endif
/* lpfc_idiag_mbxacc_dump_bsg_mbox - idiag debugfs dump bsg mailbox command
* @phba: Pointer to HBA context object.
@@ -5707,6 +5807,19 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
goto debug_failed;
}
+ /* RAS log */
+ snprintf(name, sizeof(name), "ras_log");
+ phba->debug_ras_log =
+ debugfs_create_file(name, 0644,
+ phba->hba_debugfs_root,
+ phba, &lpfc_debugfs_ras_log);
+ if (!phba->debug_ras_log) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+ "6148 Cannot create debugfs"
+ " ras_log\n");
+ goto debug_failed;
+ }
+
/* Setup hbqinfo */
snprintf(name, sizeof(name), "hbqinfo");
phba->debug_hbqinfo =
@@ -6117,6 +6230,9 @@ lpfc_debugfs_terminate(struct lpfc_vport *vport)
debugfs_remove(phba->debug_hbqinfo); /* hbqinfo */
phba->debug_hbqinfo = NULL;
+ debugfs_remove(phba->debug_ras_log);
+ phba->debug_ras_log = NULL;
+
#ifdef LPFC_HDWQ_LOCK_STAT
debugfs_remove(phba->debug_lockstat); /* lockstat */
phba->debug_lockstat = NULL;