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| author | FUJITA Tomonori <tomof@acm.org> | 2007-09-01 02:02:20 +0900 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-10-12 14:46:55 -0400 |
| commit | 5dc2b89e124251662f580f4ba3c9f6195d1eaff6 (patch) | |
| tree | a20051d208547da30b9e66ed3746d8a7237c289a /include/scsi | |
| parent | 8184fe9b6e8928c8d5be3e2a1326b8b9183e409d (diff) | |
| download | linux-5dc2b89e124251662f580f4ba3c9f6195d1eaff6.tar.gz | |
[SCSI] add supported_mode and active_mode attributes to the host
This adds supported_mode and active_mode attributes to /sys/class/sys_host/hostX/ for specifying the mode that a lld supports and the currently activated mode. The output format is similar to fc rport roles: luce:/sys/class/scsi_host/host0$ cat supported_mode Initiator luce:/sys/class/scsi_host/host0$ cat active_mode Initiator The mode values uses bitmap since we would support dual-mode llds in the future like this: luce:/sys/class/scsi_host/host0$ cat supported_mode Initiator, Target The supported_mode attribute looks at a scsi_host_template and the active_mode attribute looks at a scsi_host. We would add a hook to a scsi_host_template to change the active_mode attribute dynamically. But now there is no hook since no lld supports that feature. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_host.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 88f6871badd8..5b79697a3a80 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -32,6 +32,9 @@ struct blk_queue_tags; #define SG_NONE 0 #define SG_ALL 0xff +#define MODE_UNKNOWN 0x00 +#define MODE_INITIATOR 0x01 +#define MODE_TARGET 0x02 #define DISABLE_CLUSTERING 0 #define ENABLE_CLUSTERING 1 @@ -405,6 +408,11 @@ struct scsi_host_template { unsigned char present; /* + * This specifies the mode that a LLD supports. + */ + unsigned supported_mode:2; + + /* * true if this host adapter uses unchecked DMA onto an ISA bus. */ unsigned unchecked_isa_dma:1; @@ -574,6 +582,7 @@ struct Scsi_Host { */ unsigned long cmd_serial_number, cmd_pid; + unsigned active_mode:2; unsigned unchecked_isa_dma:1; unsigned use_clustering:1; unsigned use_blk_tcq:1; |