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Subject[PATCH 1/4] ide: add generic packet command representation ide_atapi_pc
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This new struct unifies ide{-floppy,-tape,-scsi}'s view of a packet command. For now,
it represents the common denominator between the three drivers while adding driver-
specific members at the end of the struct which will be merged/simplified into the
generic ATAPI handling code in later steps, or removed completely.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
include/linux/ide.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index e4eddd4..aae98d7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -629,6 +629,53 @@ typedef struct ide_settings_s {

int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);

+struct ide_atapi_pc {
+ /* actual packet bytes */
+ u8 c[12];
+ /* incremented on each retry */
+ int retries;
+ int error;
+
+ /* bytes to transfer */
+ int req_xfer;
+ /* bytes actually transferred */
+ int xferred;
+
+ /* data buffer */
+ u8 *buf;
+ /* current buffer position */
+ u8 *cur_pos;
+ int buf_size;
+ /* missing/available data on the current buffer */
+ int b_count;
+
+ /* the corresponding request */
+ struct request *rq;
+
+ unsigned long flags;
+
+ /*
+ * those are more or less driver-specific and some of them are subject
+ * to change/removal later.
+ */
+ u8 pc_buf[256];
+ void (*idefloppy_callback) (ide_drive_t *);
+ ide_startstop_t (*idetape_callback) (ide_drive_t *);
+
+ /* idetape only */
+ struct idetape_bh *bh;
+ char *b_data;
+
+ /* idescsi only for now */
+ struct scatterlist *sg;
+ unsigned int sg_cnt;
+
+ struct scsi_cmnd *scsi_cmd;
+ void (*done) (struct scsi_cmnd *);
+
+ unsigned long timeout;
+};
+
/*
* /proc/ide interface
*/
--
1.5.3.7


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