#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
+#define DISABLE_SG_CHAINING 0
+#define ENABLE_SG_CHAINING 1
+
enum scsi_eh_timer_return {
EH_NOT_HANDLED,
EH_HANDLED,
* the LLD. When the driver is finished processing the command
* the done callback is invoked.
*
+ * This is called to inform the LLD to transfer
+ * cmd->request_bufflen bytes. The cmd->use_sg speciefies the
+ * number of scatterlist entried in the command and
+ * cmd->request_buffer contains the scatterlist.
+ *
* return values: see queuecommand
*
* If the LLD accepts the cmd, it should set the result to an
/* TODO: rename */
int (* transfer_response)(struct scsi_cmnd *,
void (*done)(struct scsi_cmnd *));
- /*
- * This is called to inform the LLD to transfer cmd->request_bufflen
- * bytes of the cmd at cmd->offset in the cmd. The cmd->use_sg
- * speciefies the number of scatterlist entried in the command
- * and cmd->request_buffer contains the scatterlist.
- *
- * If the command cannot be processed in one transfer_data call
- * becuase a scatterlist within the LLD's limits cannot be
- * created then transfer_data will be called multiple times.
- * It is initially called from process context, and later
- * calls are from the interrup context.
- */
- int (* transfer_data)(struct scsi_cmnd *,
- void (*done)(struct scsi_cmnd *));
-
- /* Used as callback for the completion of task management request. */
- int (* tsk_mgmt_response)(u64 mid, int result);
/*
* This is an error handling strategy routine. You don't need to
int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
/*
- * suspend support
+ * This is an optional routine that allows the transport to become
+ * involved when a scsi io timer fires. The return value tells the
+ * timer routine how to finish the io timeout handling:
+ * EH_HANDLED: I fixed the error, please complete the command
+ * EH_RESET_TIMER: I need more time, reset the timer and
+ * begin counting again
+ * EH_NOT_HANDLED Begin normal error recovery
+ *
+ * Status: OPTIONAL
*/
- int (*resume)(struct scsi_device *);
- int (*suspend)(struct scsi_device *, pm_message_t state);
+ enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *);
/*
* Name of proc directory
*/
- char *proc_name;
+ const char *proc_name;
/*
* Used to store the procfs directory if a driver implements the
*/
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 ordered_tag:1;
+ /*
+ * true if the low-level driver can support sg chaining. this
+ * will be removed eventually when all the drivers are
+ * converted to support sg chaining.
+ *
+ * Status: OBSOLETE
+ */
+ unsigned use_sg_chaining:1;
+
/*
* Countdown for host blocking with no commands outstanding
*/
* Used to assign serial numbers to the cmds.
* Protected by the host lock.
*/
- unsigned long cmd_serial_number, cmd_pid;
+ unsigned long cmd_serial_number;
+ unsigned active_mode:2;
unsigned unchecked_isa_dma:1;
unsigned use_clustering:1;
unsigned use_blk_tcq:1;
+ unsigned use_sg_chaining:1;
/*
* Host has requested that no further requests come through for the
#define shost_printk(prefix, shost, fmt, a...) \
dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
+static inline void *shost_priv(struct Scsi_Host *shost)
+{
+ return (void *)shost->hostdata;
+}
int scsi_is_host_device(const struct device *);