--- /dev/null
+/*
+ * Copyright 2014 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 __SNIC_TRC_H
+#define __SNIC_TRC_H
+
+#ifdef CONFIG_SCSI_SNIC_DEBUG_FS
+
+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 snic_trace_max_pages;
+
+/* Global Data structure for trace to manage trace functionality */
+struct snic_trc_data {
+ u64 ts; /* Time Stamp */
+ char *fn; /* Ptr to Function Name */
+ u32 hno; /* SCSI Host ID */
+ u32 tag; /* Command Tag */
+ u64 data[5];
+} __attribute__((__packed__));
+
+#define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
+
+struct snic_trc {
+ spinlock_t lock;
+ struct snic_trc_data *buf; /* Trace Buffer */
+ u32 max_idx; /* Max Index into trace buffer */
+ u32 rd_idx;
+ u32 wr_idx;
+ bool enable; /* Control Variable for Tracing */
+
+ struct dentry *trc_enable; /* debugfs file object */
+ struct dentry *trc_file;
+};
+
+int snic_trc_init(void);
+void snic_trc_free(void);
+int snic_trc_debugfs_init(void);
+void snic_trc_debugfs_term(void);
+struct snic_trc_data *snic_get_trc_buf(void);
+int snic_get_trc_data(char *buf, int buf_sz);
+
+int snic_debugfs_init(void);
+void snic_debugfs_term(void);
+
+static inline void
+snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
+{
+ struct snic_trc_data *tr_rec = snic_get_trc_buf();
+
+ if (!tr_rec)
+ return;
+
+ tr_rec->fn = (char *)fn;
+ tr_rec->hno = hno;
+ tr_rec->tag = tag;
+ tr_rec->data[0] = d1;
+ tr_rec->data[1] = d2;
+ tr_rec->data[2] = d3;
+ tr_rec->data[3] = d4;
+ tr_rec->data[4] = d5;
+ tr_rec->ts = jiffies; /* Update time stamp at last */
+}
+
+#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
+ do { \
+ if (unlikely(snic_glob->trc.enable)) \
+ snic_trace((char *)__func__, \
+ (u16)(_hno), \
+ (u32)(_tag), \
+ (u64)(d1), \
+ (u64)(d2), \
+ (u64)(d3), \
+ (u64)(d4), \
+ (u64)(d5)); \
+ } while (0)
+#else
+
+#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
+ do { \
+ if (unlikely(snic_log_level & 0x2)) \
+ SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
+ (char *)__func__, \
+ (u16)(_hno), \
+ (u32)(_tag), \
+ (u64)(d1), \
+ (u64)(d2), \
+ (u64)(d3), \
+ (u64)(d4), \
+ (u64)(d5)); \
+ } while (0)
+#endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
+
+#define SNIC_TRC_CMD(sc) \
+ ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
+ (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
+ (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
+ (u64)sc->cmnd[5])
+
+#define SNIC_TRC_CMD_STATE_FLAGS(sc) \
+ ((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
+
+#endif /* end of __SNIC_TRC_H */
Code Review / kvmfornfv.git / blobdiff