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[SCSI] isci: debug, provide state-enum-to-string conversions

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Debugging the driver requires tracing the state transtions and tracing
state names is less work than decoding numbers.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams
2012-02-10 01:18:44 -08:00
committed by James Bottomley
parent 16d3db1b29
commit d7a0ccdd9b
10 changed files with 432 additions and 520 deletions
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97
drivers/scsi/isci/remote_node_context.h
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@@ -85,61 +85,50 @@ struct sci_remote_node_context;
typedef void (*scics_sds_remote_node_context_callback)(void *);
/**
* This is the enumeration of the remote node context states.
* enum sci_remote_node_context_states
* @SCI_RNC_INITIAL initial state for a remote node context. On a resume
* request the remote node context will transition to the posting state.
*
* @SCI_RNC_POSTING: transition state that posts the RNi to the hardware. Once
* the RNC is posted the remote node context will be made ready.
*
* @SCI_RNC_INVALIDATING: transition state that will post an RNC invalidate to
* the hardware. Once the invalidate is complete the remote node context will
* transition to the posting state.
*
* @SCI_RNC_RESUMING: transition state that will post an RNC resume to the
* hardare. Once the event notification of resume complete is received the
* remote node context will transition to the ready state.
*
* @SCI_RNC_READY: state that the remote node context must be in to accept io
* request operations.
*
* @SCI_RNC_TX_SUSPENDED: state that the remote node context transitions to when
* it gets a TX suspend notification from the hardware.
*
* @SCI_RNC_TX_RX_SUSPENDED: state that the remote node context transitions to
* when it gets a TX RX suspend notification from the hardware.
*
* @SCI_RNC_AWAIT_SUSPENSION: wait state for the remote node context that waits
* for a suspend notification from the hardware. This state is entered when
* either there is a request to supend the remote node context or when there is
* a TC completion where the remote node will be suspended by the hardware.
*/
enum scis_sds_remote_node_context_states {
/**
* This state is the initial state for a remote node context. On a resume
* request the remote node context will transition to the posting state.
*/
SCI_RNC_INITIAL,
/**
* This is a transition state that posts the RNi to the hardware. Once the RNC
* is posted the remote node context will be made ready.
*/
SCI_RNC_POSTING,
/**
* This is a transition state that will post an RNC invalidate to the
* hardware. Once the invalidate is complete the remote node context will
* transition to the posting state.
*/
SCI_RNC_INVALIDATING,
/**
* This is a transition state that will post an RNC resume to the hardare.
* Once the event notification of resume complete is received the remote node
* context will transition to the ready state.
*/
SCI_RNC_RESUMING,
/**
* This is the state that the remote node context must be in to accept io
* request operations.
*/
SCI_RNC_READY,
/**
* This is the state that the remote node context transitions to when it gets
* a TX suspend notification from the hardware.
*/
SCI_RNC_TX_SUSPENDED,
/**
* This is the state that the remote node context transitions to when it gets
* a TX RX suspend notification from the hardware.
*/
SCI_RNC_TX_RX_SUSPENDED,
/**
* This state is a wait state for the remote node context that waits for a
* suspend notification from the hardware. This state is entered when either
* there is a request to supend the remote node context or when there is a TC
* completion where the remote node will be suspended by the hardware.
*/
SCI_RNC_AWAIT_SUSPENSION
};
#define RNC_STATES {\
C(RNC_INITIAL),\
C(RNC_POSTING),\
C(RNC_INVALIDATING),\
C(RNC_RESUMING),\
C(RNC_READY),\
C(RNC_TX_SUSPENDED),\
C(RNC_TX_RX_SUSPENDED),\
C(RNC_AWAIT_SUSPENSION),\
}
#undef C
#define C(a) SCI_##a
enum scis_sds_remote_node_context_states RNC_STATES;
#undef C
const char *rnc_state_name(enum scis_sds_remote_node_context_states state);
/**
*