From 5dc2b89e124251662f580f4ba3c9f6195d1eaff6 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Sat, 1 Sep 2007 02:02:20 +0900 Subject: [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 Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/scsi_host.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/scsi') 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 @@ -404,6 +407,11 @@ 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. */ @@ -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; -- cgit v1.2.3-59-g8ed1b