#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
+#include <scsi/scsi.h>
struct request_queue;
struct block_device;
* NONE: Self evident. Host adapter is not capable of scatter-gather.
* ALL: Means that the host adapter module can do scatter-gather,
* and that there is no limit to the size of the table to which
- * we scatter/gather data.
+ * we scatter/gather data. The value we set here is the maximum
+ * single element sglist. To use chained sglists, the adapter
+ * has to set a value beyond ALL (and correctly use the chain
+ * handling API.
* Anything else: Indicates the maximum number of chains that can be
* used in one scatter-gather request.
*/
#define SG_NONE 0
-#define SG_ALL 0xff
+#define SG_ALL SCSI_MAX_SG_SEGMENTS
#define MODE_UNKNOWN 0x00
#define MODE_INITIATOR 0x01
*/
int (* eh_abort_handler)(struct scsi_cmnd *);
int (* eh_device_reset_handler)(struct scsi_cmnd *);
+ int (* eh_target_reset_handler)(struct scsi_cmnd *);
int (* eh_bus_reset_handler)(struct scsi_cmnd *);
int (* eh_host_reset_handler)(struct scsi_cmnd *);
* If the host wants to be called before the scan starts, but
* after the midlayer has set up ready for the scan, it can fill
* in this function.
+ *
+ * Status: OPTIONAL
*/
void (* scan_start)(struct Scsi_Host *);
/*
- * fill in this function to allow the queue depth of this host
- * to be changeable (on a per device basis). returns either
+ * Fill in this function to allow the queue depth of this host
+ * to be changeable (on a per device basis). Returns either
* the current queue depth setting (may be different from what
* was passed in) or an error. An error should only be
* returned if the requested depth is legal but the driver was
* unable to set it. If the requested depth is illegal, the
* driver should set and return the closest legal queue depth.
*
+ * Status: OPTIONAL
*/
int (* change_queue_depth)(struct scsi_device *, int);
/*
- * fill in this function to allow the changing of tag types
+ * Fill in this function to allow the changing of tag types
* (this also allows the enabling/disabling of tag command
* queueing). An error should only be returned if something
* went wrong in the driver while trying to set the tag type.
* If the driver doesn't support the requested tag type, then
* it should set the closest type it does support without
* returning an error. Returns the actual tag type set.
+ *
+ * Status: OPTIONAL
*/
int (* change_queue_type)(struct scsi_device *, int);
/*
- * This function determines the bios parameters for a given
+ * This function determines the BIOS parameters for a given
* harddisk. These tend to be numbers that are made up by
* the host adapter. Parameters:
* size, device, list (heads, sectors, cylinders)
*
- * Status: OPTIONAL */
+ * Status: OPTIONAL
+ */
int (* bios_param)(struct scsi_device *, struct block_device *,
sector_t, int []);
/*
* This determines if we will use a non-interrupt driven
- * or an interrupt driven scheme, It is set to the maximum number
+ * or an interrupt driven scheme. It is set to the maximum number
* of simultaneous commands a given host adapter will accept.
*/
int can_queue;
unsigned short sg_tablesize;
/*
- * If the host adapter has limitations beside segment count
+ * Set this if the host adapter has limitations beside segment count.
*/
unsigned short max_sectors;
/*
- * dma scatter gather segment boundary limit. a segment crossing this
+ * DMA scatter gather segment boundary limit. A segment crossing this
* boundary will be split in two.
*/
unsigned long dma_boundary;
* This specifies "machine infinity" for host templates which don't
* limit the transfer size. Note this limit represents an absolute
* maximum, and may be over the transfer limits allowed for
- * individual devices (e.g. 256 for SCSI-1)
+ * individual devices (e.g. 256 for SCSI-1).
*/
#define SCSI_DEFAULT_MAX_SECTORS 1024
unsigned supported_mode:2;
/*
- * true if this host adapter uses unchecked DMA onto an ISA bus.
+ * True if this host adapter uses unchecked DMA onto an ISA bus.
*/
unsigned unchecked_isa_dma:1;
/*
- * true if this host adapter can make good use of clustering.
+ * True if this host adapter can make good use of clustering.
* I originally thought that if the tablesize was large that it
* was a waste of CPU cycles to prepare a cluster list, but
* it works out that the Buslogic is faster if you use a smaller
unsigned use_clustering:1;
/*
- * True for emulated SCSI host adapters (e.g. ATAPI)
+ * True for emulated SCSI host adapters (e.g. ATAPI).
*/
unsigned emulated:1;
unsigned skip_settle_delay:1;
/*
- * ordered write support
+ * True if we are using ordered write support.
*/
unsigned ordered_tag:1;
/*
- * Countdown for host blocking with no commands outstanding
+ * Countdown for host blocking with no commands outstanding.
*/
unsigned int max_host_blocked;
/*
* Pointer to the sysfs class properties for this host, NULL terminated.
*/
- struct class_device_attribute **shost_attrs;
+ struct device_attribute **shost_attrs;
/*
* Pointer to the SCSI device properties for this host, NULL terminated.
struct scsi_transport_template *transportt;
/*
- * area to keep a shared tag map (if needed, will be
- * NULL if not)
+ * Area to keep a shared tag map (if needed, will be
+ * NULL if not).
*/
struct blk_queue_tag *bqt;
/*
* Host uses correct SCSI ordering not PC ordering. The bit is
* set for the minority of drivers whose authors actually read
- * the spec ;)
+ * the spec ;).
*/
unsigned reverse_ordering:1;
/*
- * ordered write support
+ * Ordered write support
*/
unsigned ordered_tag:1;
- /* task mgmt function in progress */
+ /* Task mgmt function in progress */
unsigned tmf_in_progress:1;
/* Asynchronous scan in progress */
enum scsi_host_state shost_state;
/* ldm bits */
- struct device shost_gendev;
- struct class_device shost_classdev;
+ struct device shost_gendev, shost_dev;
/*
* List of hosts per template.
};
#define class_to_shost(d) \
- container_of(d, struct Scsi_Host, shost_classdev)
+ container_of(d, struct Scsi_Host, shost_dev)
#define shost_printk(prefix, shost, fmt, a...) \
dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
projects / linux-2.6-omap-h63xx.git / blobdiff