From e39c91637337fc1afc54fe8e215f1493395601a3 Mon Sep 17 00:00:00 2001
From: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Date: Tue, 28 Mar 2017 10:47:43 +1100
Subject: mboxd: Update mboxd to implement protocol V2 and add dbus support

Version 2 of the mbox protocol contains a few changes such as:
 - All sizes are in block size
 - Adds an erase command
 - Adds new response codes
 - Adds new BMC events
 - Open windows commands now take a size directive

Update the mailbox daemon to support version 2 of the protocol which
includes implementing all of the V2 functionality. Also entirely refactor
the mboxd.c code to make it more modular improving readability and
maintainability.

At the same time improve the functionality by adding:
 - Multiple windows in the daemon (still only one active window) to cache
   flash contents
 - Implement a dbus interface to allow interaction with the daemon
 - Handle sigterm and sigint and terminate cleanly

The previous implementation utilised the entire reserved memory region.
Update the daemon so that on the command line the number of windows and
the size of each which the reserved memory region will be split into can
be specified. The reserved memory region is then divided between the
windows, however there can still only be one "active" window at a time.
The daemon uses these windows to cache the flash contents meaning the
flash doesn't have to be copied when the host requests access assuming
the daemon already has a copy.

A dbus interface is added so that commands can be sent to the daemon to
control it's operation from the bmc. These include suspending and resuming
the daemon to synchronise flash access, telling the daemon to point the lpc
mapping back to flash and telling the daemon when the flash has been
modified out from under it.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Change-Id: I10be01a395c2bec437cf2c825fdd144580b60dbc
---
 common.h | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 52 insertions(+), 6 deletions(-)

(limited to 'common.h')

diff --git a/common.h b/common.h
index dc92934..ee537a8 100644
--- a/common.h
+++ b/common.h
@@ -4,16 +4,19 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *    http://www.apache.org/licenses/LICENSE-2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
  *
- *	Unless required by applicable law or agreed to in writing, software
- *	distributed under the License is distributed on an "AS IS" BASIS,
- *	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *	See the License for the specific language governing permissions and
- *	limitations under the License.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  *
  */
 
+#ifndef COMMON_H
+#define COMMON_H
+
 #ifndef PREFIX
 #define PREFIX ""
 #endif
@@ -24,6 +27,13 @@ enum {
    MBOX_LOG_DEBUG = 2
 } verbosity;
 
+#define MSG_OUT(f_, ...)	do { if (verbosity >= MBOX_LOG_DEBUG) { \
+					mbox_log(LOG_INFO, f_, ##__VA_ARGS__); \
+				} } while (0)
+#define MSG_ERR(f_, ...)	do { if (verbosity >= MBOX_LOG_VERBOSE) { \
+					mbox_log(LOG_ERR, f_, ##__VA_ARGS__); \
+				} } while (0)
+
 void (*mbox_vlog)(int p, const char *fmt, va_list args);
 
 void mbox_log_console(int p, const char *fmt, va_list args);
@@ -39,4 +49,40 @@ uint32_t get_u32(uint8_t *ptr);
 
 void put_u32(uint8_t *ptr, uint32_t val);
 
+static inline uint32_t align_up(uint32_t val, uint32_t size)
+{
+	return (((val) + (size) - 1) & ~((size) - 1));
+}
+
+static inline uint32_t align_down(uint32_t val, uint32_t size)
+{
+	return ((val) & ~(((size) - 1)));
+}
+
+static inline uint32_t min_u32(uint32_t a, uint32_t b)
+{
+	if (a <= b) {
+		return a;
+	}
+
+	return b;
+}
+
+static inline int log_2(int val)
+{
+	int ret = 0;
+
+	if (val <= 0) {
+		return -1;
+	}
+
+	while (val >>= 1) {
+		ret++;
+	}
+
+	return ret;
+}
+
 char *get_dev_mtd(void);
+
+#endif /* COMMON_H */
-- 
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