diff options
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 1 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 16 |
2 files changed, 15 insertions, 2 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 76ed5e4acd38..91bd749a02f7 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -57,6 +57,7 @@ struct scsi_pointer { #define SCMD_TAGGED (1 << 0) #define SCMD_UNCHECKED_ISA_DMA (1 << 1) #define SCMD_INITIALIZED (1 << 2) +#define SCMD_LAST (1 << 3) /* flags preserved across unprep / reprep */ #define SCMD_PRESERVED_FLAGS (SCMD_UNCHECKED_ISA_DMA | SCMD_INITIALIZED) diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index cc139dbd71e5..31e0d6ca1eba 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -80,8 +80,10 @@ struct scsi_host_template { * command block to the LLDD. When the driver finished * processing the command the done callback is invoked. * - * If queuecommand returns 0, then the HBA has accepted the - * command. The done() function must be called on the command + * If queuecommand returns 0, then the driver has accepted the + * command. It must also push it to the HBA if the scsi_cmnd + * flag SCMD_LAST is set, or if the driver does not implement + * commit_rqs. The done() function must be called on the command * when the driver has finished with it. (you may call done on the * command before queuecommand returns, but in this case you * *must* return 0 from queuecommand). @@ -110,6 +112,16 @@ struct scsi_host_template { int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *); /* + * The commit_rqs function is used to trigger a hardware + * doorbell after some requests have been queued with + * queuecommand, when an error is encountered before sending + * the request with SCMD_LAST set. + * + * STATUS: OPTIONAL + */ + void (*commit_rqs)(struct Scsi_Host *, u16); + + /* * This is an error handling strategy routine. You don't need to * define one of these if you don't want to - there is a default * routine that is present that should work in most cases. For those |