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| author | James Bottomley <James.Bottomley@steeleye.com> | 2005-05-24 12:06:38 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-05-26 11:27:53 -0400 |
| commit | a283bd37d00e92e8874ca6325ae071691d4db388 (patch) | |
| tree | 4c436d59fc326e3545c575a88b92fd31ace841a5 /include/scsi | |
| parent | 631e8a1398ce4cfef8b30678d51daf0c64313a09 (diff) | |
| download | linux-3.10-a283bd37d00e92e8874ca6325ae071691d4db388.tar.gz linux-3.10-a283bd37d00e92e8874ca6325ae071691d4db388.tar.bz2 linux-3.10-a283bd37d00e92e8874ca6325ae071691d4db388.zip | |
[SCSI] Add target alloc/destroy callbacks to the host template
This gives the HBA driver notice when a target is created and
destroyed to allow it to manage its own target based allocations
accordingly.
This is a much reduced verson of the original patch sent in by
James.Smart@Emulex.com
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_device.h | 4 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 25 |
2 files changed, 28 insertions, 1 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index c018020d916..63c91dd85ca 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -154,7 +154,9 @@ struct scsi_target { unsigned int id; /* target id ... replace * scsi_device.id eventually */ unsigned long create:1; /* signal that it needs to be added */ - unsigned long starget_data[0]; + void *hostdata; /* available to low-level driver */ + unsigned long starget_data[0]; /* for the transport */ + /* starget_data must be the last element!!!! */ } __attribute__((aligned(sizeof(unsigned long)))); #define to_scsi_target(d) container_of(d, struct scsi_target, dev) diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 1cee1e10094..db9914adeac 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -10,6 +10,7 @@ struct block_device; struct module; struct scsi_cmnd; struct scsi_device; +struct scsi_target; struct Scsi_Host; struct scsi_host_cmd_pool; struct scsi_transport_template; @@ -228,6 +229,30 @@ struct scsi_host_template { void (* slave_destroy)(struct scsi_device *); /* + * Before the mid layer attempts to scan for a new device attached + * to a target where no target currently exists, it will call this + * entry in your driver. Should your driver need to allocate any + * structs or perform any other init items in order to send commands + * to a currently unused target, then this is where you can perform + * those allocations. + * + * Return values: 0 on success, non-0 on failure + * + * Status: OPTIONAL + */ + int (* target_alloc)(struct scsi_target *); + + /* + * Immediately prior to deallocating the target structure, and + * after all activity to attached scsi devices has ceased, the + * midlayer calls this point so that the driver may deallocate + * and terminate any references to the target. + * + * Status: OPTIONAL + */ + void (* target_destroy)(struct scsi_target *); + + /* * fill in this function to allow the queue depth of this host * to be changeable (on a per device basis). returns either * the current queue depth setting (may be different from what |