1 files changed, 346 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_log.c b/drivers/scsi/bfa/bfa_log.c
new file mode 100644
index 000000000000..c2735e55cf03
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_log.c
@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+/**
+ *  bfa_log.c BFA log library
+ */
+
+#include <bfa_os_inc.h>
+#include <cs/bfa_log.h>
+
+/*
+ * global log info structure
+ */
+struct bfa_log_info_s {
+        u32        start_idx;   /*  start index for a module */
+        u32        total_count; /*  total count for a module */
+        enum bfa_log_severity level;    /*  global log level */
+        bfa_log_cb_t    cbfn;           /*  callback function */
+};
+
+static struct bfa_log_info_s bfa_log_info[BFA_LOG_MODULE_ID_MAX + 1];
+static u32 bfa_log_msg_total_count;
+static int      bfa_log_initialized;
+
+static char    *bfa_log_severity[] =
+        { "[none]", "[critical]", "[error]", "[warn]", "[info]", "" };
+
+/**
+ * BFA log library initialization
+ *
+ * The log library initialization includes the following,
+ *    - set log instance name and callback function
+ *    - read the message array generated from xml files
+ *    - calculate start index for each module
+ *    - calculate message count for each module
+ *    - perform error checking
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] instance_name - instance name
+ * @param[in] cbfn - callback function
+ *
+ * It return 0 on success, or -1 on failure
+ */
+int
+bfa_log_init(struct bfa_log_mod_s *log_mod, char *instance_name,
+                        bfa_log_cb_t cbfn)
+{
+        struct bfa_log_msgdef_s *msg;
+        u32        pre_mod_id = 0;
+        u32        cur_mod_id = 0;
+        u32        i, pre_idx, idx, msg_id;
+
+        /*
+         * set instance name
+         */
+        if (log_mod) {
+                strncpy(log_mod->instance_info, instance_name,
+                        sizeof(log_mod->instance_info));
+                log_mod->cbfn = cbfn;
+                for (i = 0; i <= BFA_LOG_MODULE_ID_MAX; i++)
+                        log_mod->log_level[i] = BFA_LOG_WARNING;
+        }
+
+        if (bfa_log_initialized)
+                return 0;
+
+        for (i = 0; i <= BFA_LOG_MODULE_ID_MAX; i++) {
+                bfa_log_info[i].start_idx = 0;
+                bfa_log_info[i].total_count = 0;
+                bfa_log_info[i].level = BFA_LOG_WARNING;
+                bfa_log_info[i].cbfn = cbfn;
+        }
+
+        pre_idx = 0;
+        idx = 0;
+        msg = bfa_log_msg_array;
+        msg_id = BFA_LOG_GET_MSG_ID(msg);
+        pre_mod_id = BFA_LOG_GET_MOD_ID(msg_id);
+        while (msg_id != 0) {
+                cur_mod_id = BFA_LOG_GET_MOD_ID(msg_id);
+
+                if (cur_mod_id > BFA_LOG_MODULE_ID_MAX) {
+                        cbfn(log_mod, msg_id,
+                                "%s%s log: module id %u out of range\n",
+                                BFA_LOG_CAT_NAME,
+                                bfa_log_severity[BFA_LOG_ERROR],
+                                cur_mod_id);
+                        return -1;
+                }
+
+                if (pre_mod_id > BFA_LOG_MODULE_ID_MAX) {
+                        cbfn(log_mod, msg_id,
+                                "%s%s log: module id %u out of range\n",
+                                BFA_LOG_CAT_NAME,
+                                bfa_log_severity[BFA_LOG_ERROR],
+                                pre_mod_id);
+                        return -1;
+                }
+
+                if (cur_mod_id != pre_mod_id) {
+                        bfa_log_info[pre_mod_id].start_idx = pre_idx;
+                        bfa_log_info[pre_mod_id].total_count = idx - pre_idx;
+                        pre_mod_id = cur_mod_id;
+                        pre_idx = idx;
+                }
+
+                idx++;
+                msg++;
+                msg_id = BFA_LOG_GET_MSG_ID(msg);
+        }
+
+        bfa_log_info[cur_mod_id].start_idx = pre_idx;
+        bfa_log_info[cur_mod_id].total_count = idx - pre_idx;
+        bfa_log_msg_total_count = idx;
+
+        cbfn(log_mod, msg_id, "%s%s log: init OK, msg total count %u\n",
+                BFA_LOG_CAT_NAME,
+                bfa_log_severity[BFA_LOG_INFO], bfa_log_msg_total_count);
+
+        bfa_log_initialized = 1;
+
+        return 0;
+}
+
+/**
+ * BFA log set log level for a module
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] mod_id - module id
+ * @param[in] log_level - log severity level
+ *
+ * It return BFA_STATUS_OK on success, or > 0 on failure
+ */
+bfa_status_t
+bfa_log_set_level(struct bfa_log_mod_s *log_mod, int mod_id,
+                  enum bfa_log_severity log_level)
+{
+        if (mod_id <= BFA_LOG_UNUSED_ID || mod_id > BFA_LOG_MODULE_ID_MAX)
+                return BFA_STATUS_EINVAL;
+
+        if (log_level <= BFA_LOG_INVALID || log_level > BFA_LOG_LEVEL_MAX)
+                return BFA_STATUS_EINVAL;
+
+        if (log_mod)
+                log_mod->log_level[mod_id] = log_level;
+        else
+                bfa_log_info[mod_id].level = log_level;
+
+        return BFA_STATUS_OK;
+}
+
+/**
+ * BFA log set log level for all modules
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] log_level - log severity level
+ *
+ * It return BFA_STATUS_OK on success, or > 0 on failure
+ */
+bfa_status_t
+bfa_log_set_level_all(struct bfa_log_mod_s *log_mod,
+                  enum bfa_log_severity log_level)
+{
+        int mod_id = BFA_LOG_UNUSED_ID + 1;
+
+        if (log_level <= BFA_LOG_INVALID || log_level > BFA_LOG_LEVEL_MAX)
+                return BFA_STATUS_EINVAL;
+
+        if (log_mod) {
+                for (; mod_id <= BFA_LOG_MODULE_ID_MAX; mod_id++)
+                        log_mod->log_level[mod_id] = log_level;
+        } else {
+                for (; mod_id <= BFA_LOG_MODULE_ID_MAX; mod_id++)
+                        bfa_log_info[mod_id].level = log_level;
+        }
+
+        return BFA_STATUS_OK;
+}
+
+/**
+ * BFA log set log level for all aen sub-modules
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] log_level - log severity level
+ *
+ * It return BFA_STATUS_OK on success, or > 0 on failure
+ */
+bfa_status_t
+bfa_log_set_level_aen(struct bfa_log_mod_s *log_mod,
+                  enum bfa_log_severity log_level)
+{
+        int mod_id = BFA_LOG_AEN_MIN + 1;
+
+        if (log_mod) {
+                for (; mod_id <= BFA_LOG_AEN_MAX; mod_id++)
+                        log_mod->log_level[mod_id] = log_level;
+        } else {
+                for (; mod_id <= BFA_LOG_AEN_MAX; mod_id++)
+                        bfa_log_info[mod_id].level = log_level;
+        }
+
+        return BFA_STATUS_OK;
+}
+
+/**
+ * BFA log get log level for a module
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] mod_id - module id
+ *
+ * It returns log level or -1 on error
+ */
+enum bfa_log_severity
+bfa_log_get_level(struct bfa_log_mod_s *log_mod, int mod_id)
+{
+        if (mod_id <= BFA_LOG_UNUSED_ID || mod_id > BFA_LOG_MODULE_ID_MAX)
+                return BFA_LOG_INVALID;
+
+        if (log_mod)
+                return (log_mod->log_level[mod_id]);
+        else
+                return (bfa_log_info[mod_id].level);
+}
+
+enum bfa_log_severity
+bfa_log_get_msg_level(struct bfa_log_mod_s *log_mod, u32 msg_id)
+{
+        struct bfa_log_msgdef_s *msg;
+        u32        mod = BFA_LOG_GET_MOD_ID(msg_id);
+        u32        idx = BFA_LOG_GET_MSG_IDX(msg_id) - 1;
+
+        if (!bfa_log_initialized)
+                return BFA_LOG_INVALID;
+
+        if (mod > BFA_LOG_MODULE_ID_MAX)
+                return BFA_LOG_INVALID;
+
+        if (idx >= bfa_log_info[mod].total_count) {
+                bfa_log_info[mod].cbfn(log_mod, msg_id,
+                        "%s%s log: inconsistent idx %u vs. total count %u\n",
+                        BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR], idx,
+                        bfa_log_info[mod].total_count);
+                return BFA_LOG_INVALID;
+        }
+
+        msg = bfa_log_msg_array + bfa_log_info[mod].start_idx + idx;
+        if (msg_id != BFA_LOG_GET_MSG_ID(msg)) {
+                bfa_log_info[mod].cbfn(log_mod, msg_id,
+                        "%s%s log: inconsistent msg id %u array msg id %u\n",
+                        BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR],
+                        msg_id, BFA_LOG_GET_MSG_ID(msg));
+                return BFA_LOG_INVALID;
+        }
+
+        return BFA_LOG_GET_SEVERITY(msg);
+}
+
+/**
+ * BFA log message handling
+ *
+ * BFA log message handling finds the message based on message id and prints
+ * out the message based on its format and arguments. It also does prefix
+ * the severity etc.
+ *
+ * @param[in] log_mod - log module info
+ * @param[in] msg_id - message id
+ * @param[in] ... - message arguments
+ *
+ * It return 0 on success, or -1 on errors
+ */
+int
+bfa_log(struct bfa_log_mod_s *log_mod, u32 msg_id, ...)
+{
+        va_list         ap;
+        char            buf[256];
+        struct bfa_log_msgdef_s *msg;
+        int             log_level;
+        u32        mod = BFA_LOG_GET_MOD_ID(msg_id);
+        u32        idx = BFA_LOG_GET_MSG_IDX(msg_id) - 1;
+
+        if (!bfa_log_initialized)
+                return -1;
+
+        if (mod > BFA_LOG_MODULE_ID_MAX)
+                return -1;
+
+        if (idx >= bfa_log_info[mod].total_count) {
+                bfa_log_info[mod].
+                        cbfn
+                        (log_mod, msg_id,
+                        "%s%s log: inconsistent idx %u vs. total count %u\n",
+                        BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR], idx,
+                        bfa_log_info[mod].total_count);
+                return -1;
+        }
+
+        msg = bfa_log_msg_array + bfa_log_info[mod].start_idx + idx;
+        if (msg_id != BFA_LOG_GET_MSG_ID(msg)) {
+                bfa_log_info[mod].
+                        cbfn
+                        (log_mod, msg_id,
+                        "%s%s log: inconsistent msg id %u array msg id %u\n",
+                        BFA_LOG_CAT_NAME, bfa_log_severity[BFA_LOG_ERROR],
+                        msg_id, BFA_LOG_GET_MSG_ID(msg));
+                return -1;
+        }
+
+        log_level = log_mod ? log_mod->log_level[mod] : bfa_log_info[mod].level;
+        if ((BFA_LOG_GET_SEVERITY(msg) > log_level) &&
+                        (msg->attributes != BFA_LOG_ATTR_NONE))
+                return 0;
+
+        va_start(ap, msg_id);
+        bfa_os_vsprintf(buf, BFA_LOG_GET_MSG_FMT_STRING(msg), ap);
+        va_end(ap);
+
+        if (log_mod)
+                log_mod->cbfn(log_mod, msg_id, "%s[%s]%s%s %s: %s\n",
+                                BFA_LOG_CAT_NAME, log_mod->instance_info,
+                                bfa_log_severity[BFA_LOG_GET_SEVERITY(msg)],
+                                (msg->attributes & BFA_LOG_ATTR_AUDIT)
+                                ? " (audit) " : "", msg->msg_value, buf);
+        else
+                bfa_log_info[mod].cbfn(log_mod, msg_id, "%s%s%s %s: %s\n",
+                                BFA_LOG_CAT_NAME,
+                                bfa_log_severity[BFA_LOG_GET_SEVERITY(msg)],
+                                (msg->attributes & BFA_LOG_ATTR_AUDIT) ?
+                                " (audit) " : "", msg->msg_value, buf);
+
+        return 0;
+}
+