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Diffstat (limited to 'drivers/scsi/fnic/fnic_trace.h')
-rw-r--r--drivers/scsi/fnic/fnic_trace.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/scsi/fnic/fnic_trace.h b/drivers/scsi/fnic/fnic_trace.h
new file mode 100644
index 000000000000..cef42b4c4d6c
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_trace.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2012 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __FNIC_TRACE_H__
+#define __FNIC_TRACE_H__
+
+#define FNIC_ENTRY_SIZE_BYTES 64
+
+extern ssize_t simple_read_from_buffer(void __user *to,
+ size_t count,
+ loff_t *ppos,
+ const void *from,
+ size_t available);
+
+extern unsigned int fnic_trace_max_pages;
+extern int fnic_tracing_enabled;
+extern unsigned int trace_max_pages;
+
+typedef struct fnic_trace_dbg {
+ int wr_idx;
+ int rd_idx;
+ unsigned long *page_offset;
+} fnic_trace_dbg_t;
+
+typedef struct fnic_dbgfs {
+ int buffer_len;
+ char *buffer;
+} fnic_dbgfs_t;
+
+struct fnic_trace_data {
+ union {
+ struct {
+ u32 low;
+ u32 high;
+ };
+ u64 val;
+ } timestamp, fnaddr;
+ u32 host_no;
+ u32 tag;
+ u64 data[5];
+} __attribute__((__packed__));
+
+typedef struct fnic_trace_data fnic_trace_data_t;
+
+#define FNIC_TRACE_ENTRY_SIZE \
+ (FNIC_ENTRY_SIZE_BYTES - sizeof(fnic_trace_data_t))
+
+#define FNIC_TRACE(_fn, _hn, _t, _a, _b, _c, _d, _e) \
+ if (unlikely(fnic_tracing_enabled)) { \
+ fnic_trace_data_t *trace_buf = fnic_trace_get_buf(); \
+ if (trace_buf) { \
+ if (sizeof(unsigned long) < 8) { \
+ trace_buf->timestamp.low = jiffies; \
+ trace_buf->fnaddr.low = (u32)(unsigned long)_fn; \
+ } else { \
+ trace_buf->timestamp.val = jiffies; \
+ trace_buf->fnaddr.val = (u64)(unsigned long)_fn; \
+ } \
+ trace_buf->host_no = _hn; \
+ trace_buf->tag = _t; \
+ trace_buf->data[0] = (u64)(unsigned long)_a; \
+ trace_buf->data[1] = (u64)(unsigned long)_b; \
+ trace_buf->data[2] = (u64)(unsigned long)_c; \
+ trace_buf->data[3] = (u64)(unsigned long)_d; \
+ trace_buf->data[4] = (u64)(unsigned long)_e; \
+ } \
+ }
+
+fnic_trace_data_t *fnic_trace_get_buf(void);
+int fnic_get_trace_data(fnic_dbgfs_t *);
+int fnic_trace_buf_init(void);
+void fnic_trace_free(void);
+int fnic_trace_debugfs_init(void);
+void fnic_trace_debugfs_terminate(void);
+
+#endif