Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / scsi / fnic / fnic_trace.h

diff --git a/kernel/drivers/scsi/fnic/fnic_trace.h b/kernel/drivers/scsi/fnic/fnic_trace.h
new file mode 100644 (file)
index 0000000..a8aa057
--- /dev/null
+++ b/kernel/drivers/scsi/fnic/fnic_trace.h
@@ -0,0 +1,129 @@
+/*
+ * 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
+#define FC_TRC_SIZE_BYTES 256
+#define FC_TRC_HEADER_SIZE sizeof(struct fc_trace_hdr)
+
+/*
+ * Fisrt bit of FNIC_FC_RECV and FNIC_FC_SEND is used to represent the type
+ * of frame 1 => Eth frame, 0=> FC frame
+ */
+
+#define FNIC_FC_RECV 0x52 /* Character R */
+#define FNIC_FC_SEND 0x54 /* Character T */
+#define FNIC_FC_LE 0x4C /* Character L */
+
+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;
+
+extern unsigned int fnic_fc_trace_max_pages;
+extern int fnic_fc_tracing_enabled;
+extern int fnic_fc_trace_cleared;
+
+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;
+
+struct fc_trace_hdr {
+       struct timespec time_stamp;
+       u32 host_no;
+       u8 frame_type;
+       u8 frame_len;
+} __attribute__((__packed__));
+
+#define FC_TRACE_ADDRESS(a) \
+       ((unsigned long)(a) + sizeof(struct fc_trace_hdr))
+
+#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_debugfs_init(void);
+void fnic_debugfs_terminate(void);
+int fnic_trace_debugfs_init(void);
+void fnic_trace_debugfs_terminate(void);
+
+/* Fnic FC CTLR Trace releated function */
+int fnic_fc_trace_init(void);
+void fnic_fc_trace_free(void);
+int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
+                               char *frame, u32 fc_frame_len);
+int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag);
+void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
+                               fnic_dbgfs_t *fnic_dbgfs_prt,
+                               int *len, u8 rdata_flag);
+int fnic_fc_trace_debugfs_init(void);
+void fnic_fc_trace_debugfs_terminate(void);
+
+#endif