diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_host.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index f5a243261236..7b8f144ccf7d 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -375,11 +375,20 @@ struct scsi_host_template { /* * This determines if we will use a non-interrupt driven * or an interrupt driven scheme. It is set to the maximum number - * of simultaneous commands a single hw queue in HBA will accept. + * of simultaneous commands a single hw queue in HBA will accept + * excluding internal commands. */ int can_queue; /* + * This determines how many commands the HBA will set aside + * for internal commands. This number will be added to + * @can_queue to calculate the maximum number of simultaneous + * commands sent to the host. + */ + int nr_reserved_cmds; + + /* * In many instances, especially where disconnect / reconnect are * supported, our host also has an ID on the SCSI bus. If this is * the case, then it must be reserved. Please set this_id to -1 if @@ -611,7 +620,17 @@ struct Scsi_Host { unsigned short max_cmd_len; int this_id; + + /* + * Number of commands this host can handle at the same time. + * This excludes reserved commands as specified by nr_reserved_cmds. + */ int can_queue; + /* + * Number of reserved commands to allocate, if any. + */ + unsigned int nr_reserved_cmds; + short cmd_per_lun; short unsigned int sg_tablesize; short unsigned int sg_prot_tablesize; |