uas: task mgmt & error handling

Add task management support, wind up in abort and device reset error
handlers.  Cancel all in-flight urbs in bus reset handler.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/include/linux/usb/uas.h b/include/linux/usb/uas.h
index 9a988e41369..5499ab5c94b 100644
--- a/include/linux/usb/uas.h
+++ b/include/linux/usb/uas.h
@@ -20,6 +20,28 @@ enum {
 	IU_ID_WRITE_READY	= 0x07,
 };
 
+enum {
+	TMF_ABORT_TASK          = 0x01,
+	TMF_ABORT_TASK_SET      = 0x02,
+	TMF_CLEAR_TASK_SET      = 0x04,
+	TMF_LOGICAL_UNIT_RESET  = 0x08,
+	TMF_I_T_NEXUS_RESET     = 0x10,
+	TMF_CLEAR_ACA           = 0x40,
+	TMF_QUERY_TASK          = 0x80,
+	TMF_QUERY_TASK_SET      = 0x81,
+	TMF_QUERY_ASYNC_EVENT   = 0x82,
+};
+
+enum {
+	RC_TMF_COMPLETE         = 0x00,
+	RC_INVALID_INFO_UNIT    = 0x02,
+	RC_TMF_NOT_SUPPORTED    = 0x04,
+	RC_TMF_FAILED           = 0x05,
+	RC_TMF_SUCCEEDED        = 0x08,
+	RC_INCORRECT_LUN        = 0x09,
+	RC_OVERLAPPED_TAG       = 0x0a,
+};
+
 struct command_iu {
 	__u8 iu_id;
 	__u8 rsvd1;
@@ -32,6 +54,16 @@ struct command_iu {
 	__u8 cdb[16];	/* XXX: Overflow-checking tools may misunderstand */
 };
 
+struct task_mgmt_iu {
+	__u8 iu_id;
+	__u8 rsvd1;
+	__be16 tag;
+	__u8 function;
+	__u8 rsvd2;
+	__be16 task_tag;
+	struct scsi_lun lun;
+};
+
 /*
  * Also used for the Read Ready and Write Ready IUs since they have the
  * same first four bytes
@@ -47,6 +79,14 @@ struct sense_iu {
 	__u8 sense[SCSI_SENSE_BUFFERSIZE];
 };
 
+struct response_ui {
+	__u8 iu_id;
+	__u8 rsvd1;
+	__be16 tag;
+	__be16 add_response_info;
+	__u8 response_code;
+};
+
 struct usb_pipe_usage_descriptor {
 	__u8  bLength;
 	__u8  bDescriptorType;