libflash/ipmi-hiomap: Add support for unit tests

Lay the ground work for unit testing the ipmi-hiomap implementation. The
design hooks a subset of the IPMI interface to move through a
data-driven "scenario" of IPMI message exchanges. Two basic tests are
added exercising the initialsation path of the protocol implementation.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/libflash/ipmi-hiomap.h b/libflash/ipmi-hiomap.h
index 4742b7d..f60f725 100644
--- a/libflash/ipmi-hiomap.h
+++ b/libflash/ipmi-hiomap.h
@@ -17,11 +17,42 @@
 #ifndef __LIBFLASH_IPMI_HIOMAP_H
 #define __LIBFLASH_IPMI_HIOMAP_H
 
+#include <lock.h>
 #include <stdbool.h>
 #include <stdint.h>
 
 #include "blocklevel.h"
 
+enum lpc_window_state { closed_window, read_window, write_window };
+
+struct lpc_window {
+	uint32_t lpc_addr; /* Offset into LPC space */
+	uint32_t cur_pos;  /* Current position of the window in the flash */
+	uint32_t size;     /* Size of the window into the flash */
+};
+
+struct ipmi_hiomap {
+	/* Members protected by the blocklevel lock */
+	uint8_t seq;
+	uint8_t version;
+	uint8_t block_size_shift;
+	uint16_t timeout;
+	struct blocklevel_device bl;
+	uint32_t total_size;
+	uint32_t erase_granule;
+	struct lpc_window current;
+
+	/*
+	 * update, bmc_state and window_state can be accessed by both calls
+	 * through read/write/erase functions and the IPMI SEL handler. All
+	 * three variables are protected by lock to avoid conflict.
+	 */
+	struct lock lock;
+	bool update;
+	uint8_t bmc_state;
+	enum lpc_window_state window_state;
+};
+
 int ipmi_hiomap_init(struct blocklevel_device **bl);
 void ipmi_hiomap_exit(struct blocklevel_device *bl);