Revise the manamgement FW mbox access locking scheme for the access to the
MFW mailbox:
- add a new linked list called cmd_list to ecore_mcp_info that tracks all
the mailbox commands sent to management FW and ones waiting for
response.
- add a mutex lock called cmd_lock to ecore_mcp_info, a spinlock used to
serialize the access to this cmd_list and makes sure that the mbox is
not a pending one before sending a new mbox request. It protects the
access to the mailbox commands list and sending of the commands.
- add ecore_mcp_cmd_add|del|get_elem() APIs for new access scheme
- remove ecore_mcp_mb_lock() and ecore_mcp_mb_unlock()
- add a mutex lock called link_lock to ecore_mcp_info, a spinlock used for
syncing SW link-changes and link-changes originating from attention
context. This locking scheme prevents possible race conditions that may
occur, such as during link status reporting.
- Surround OSAL_{MUTEX,SPIN_LOCK}_{ALLOC,DEALLOC} with
'#ifdef CONFIG_ECORE_LOCK_ALLOC'. In case memory has to be allocated for
lock primitives, then compile driver with CONFIG_ECORE_LOCK_ALLOC flag.
Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>
22c996968b