liquidio: improve soft command handling
1. Set LIO_SC_MAX_TMO_MS as the maximum timeout value for a soft command
(sc). All sc's use this value as a hard timeout value. Add expiry_time
in struct octeon_soft_command to keep the hard timeout value. The field
wait_time and timeout in struct octeon_soft_command will be obsoleted in
the last patch of this patch series.
2. Add processing a synchronous sc in sc response thread
lio_process_ordered_list. The memory allocated for a synchronous sc will
be freed by lio_process_ordered_list() to the sc pool.
3. Add two response lists for lio_process_ordered_list to process the
storage allocated for sc's:
OCTEON_DONE_SC_LIST response list keeps all sc's which will be freed to
the pool after their requestors have finished processing the responses.
OCTEON_ZOMBIE_SC_LIST response list keeps all sc's which have got
LIO_SC_MAX_TMO_MS timeout.
When an sc gets a hard timeout, lio_process_order_list() will recheck
its status 1 ms later. If the status has not updated by the firmware at
that time, the sc will be removed from OCTEON_DONE_SC_LIST response list
to OCTEON_ZOMBIE_SC_LIST response list. The sc's in the
OCTEON_ZOMBIE_SC_LIST response list will be freed when the driver is
unloaded.
Signed-off-by: Weilin Chang <weilin.chang@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 files changed