#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/types.h>
+#include <linux/timer.h>
struct request;
struct scatterlist;
+struct Scsi_Host;
struct scsi_device;
-struct scsi_request;
/* embedded in scsi_cmnd */
};
struct scsi_cmnd {
- int sc_magic;
-
struct scsi_device *device;
- unsigned short state;
- unsigned short owner;
- struct scsi_request *sc_request;
-
struct list_head list; /* scsi_cmnd participates in queue lists */
-
struct list_head eh_entry; /* entry for the host eh_cmd_q */
- int eh_state; /* Used for state tracking in error handlr */
int eh_eflags; /* Used by error handlr */
void (*done) (struct scsi_cmnd *); /* Mid-level done function */
* printk's to use ->pid, so that we can kill this field.
*/
unsigned long serial_number;
+ /*
+ * This is set to jiffies as it was when the command was first
+ * allocated. It is used to time how long the command has
+ * been outstanding
+ */
+ unsigned long jiffies_at_alloc;
int retries;
int allowed;
int timeout_per_command;
- int timeout_total;
- int timeout;
unsigned char cmd_len;
- unsigned char old_cmd_len;
enum dma_data_direction sc_data_direction;
- enum dma_data_direction sc_old_data_direction;
/* These elements define the operation we are about to perform */
#define MAX_COMMAND_SIZE 16
void *request_buffer; /* Actual requested buffer */
/* These elements define the operation we ultimately want to perform */
- unsigned char data_cmnd[MAX_COMMAND_SIZE];
- unsigned short old_use_sg; /* We save use_sg here when requesting
- * sense info */
unsigned short use_sg; /* Number of pieces of scatter-gather */
unsigned short sglist_len; /* size of malloc'd scatter-gather list */
- unsigned short abort_reason; /* If the mid-level code requests an
- * abort, this is the reason. */
- unsigned bufflen; /* Size of data buffer */
- void *buffer; /* Data buffer */
+
+ /* offset in cmd we are at (for multi-transfer tgt cmds) */
+ unsigned offset;
unsigned underflow; /* Return error if less than
this amount is transferred */
- unsigned old_underflow; /* save underflow here when reusing the
- * command for error handling */
unsigned transfersize; /* How much we are guaranteed to
transfer with each SCSI transfer
working on */
#define SCSI_SENSE_BUFFERSIZE 96
- unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE]; /* obtained by REQUEST SENSE
- * when CHECK CONDITION is
- * received on original command
- * (auto-sense) */
+ unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];
+ /* obtained by REQUEST SENSE when
+ * CHECK CONDITION is received on original
+ * command (auto-sense) */
/* Low-level done function - can be used by low-level driver to point
* to completion function. Not used by mid/upper level code. */
struct scsi_pointer SCp; /* Scratchpad used by some host adapters */
unsigned char *host_scribble; /* The host adapter is allowed to
- * call scsi_malloc and get some memory
- * and hang it here. The host adapter
- * is also expected to call scsi_free
- * to release this memory. (The memory
- * obtained by scsi_malloc is guaranteed
- * to be at an address < 16Mb). */
+ * call scsi_malloc and get some memory
+ * and hang it here. The host adapter
+ * is also expected to call scsi_free
+ * to release this memory. (The memory
+ * obtained by scsi_malloc is guaranteed
+ * to be at an address < 16Mb). */
int result; /* Status code from lower level driver */
unsigned long pid; /* Process ID, starts at 0. Unique per host. */
};
-/*
- * These are the values that scsi_cmd->state can take.
- */
-#define SCSI_STATE_TIMEOUT 0x1000
-#define SCSI_STATE_FINISHED 0x1001
-#define SCSI_STATE_FAILED 0x1002
-#define SCSI_STATE_QUEUED 0x1003
-#define SCSI_STATE_UNUSED 0x1006
-#define SCSI_STATE_DISCONNECTING 0x1008
-#define SCSI_STATE_INITIALIZING 0x1009
-#define SCSI_STATE_BHQUEUE 0x100a
-#define SCSI_STATE_MLQUEUE 0x100b
-
-
-extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, int);
+extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);
+extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t);
extern void scsi_put_command(struct scsi_cmnd *);
-extern void scsi_io_completion(struct scsi_cmnd *, unsigned int, unsigned int);
+extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *,
+ struct device *);
+extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
extern void scsi_finish_command(struct scsi_cmnd *cmd);
+extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd);
+
+extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
+ size_t *offset, size_t *len);
+extern void scsi_kunmap_atomic_sg(void *virt);
+
+extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t);
+extern void scsi_free_sgtable(struct scatterlist *, int);
#endif /* _SCSI_SCSI_CMND_H */