diff options
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_glue.c')
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_glue.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index a2bfdf8417a2..d924997db48b 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -514,9 +514,10 @@ static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struc */ int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp) { - int dir; struct sym_tcb *tp = &np->target[cp->target]; struct sym_lcb *lp = sym_lp(tp, cp->lun); + u32 lastp, goalp; + int dir; /* * Build the CDB. @@ -534,15 +535,47 @@ int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct s sym_set_cam_status(cmd, DID_ERROR); goto out_abort; } + + /* + * No segments means no data. + */ + if (!cp->segments) + dir = DMA_NONE; } else { cp->data_len = 0; cp->segments = 0; } /* - * Set data pointers. + * Set the data pointer. + */ + switch (dir) { + case DMA_BIDIRECTIONAL: + printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np)); + sym_set_cam_status(cmd, DID_ERROR); + goto out_abort; + case DMA_TO_DEVICE: + goalp = SCRIPTA_BA(np, data_out2) + 8; + lastp = goalp - 8 - (cp->segments * (2*4)); + break; + case DMA_FROM_DEVICE: + cp->host_flags |= HF_DATA_IN; + goalp = SCRIPTA_BA(np, data_in2) + 8; + lastp = goalp - 8 - (cp->segments * (2*4)); + break; + case DMA_NONE: + default: + lastp = goalp = SCRIPTB_BA(np, no_data); + break; + } + + /* + * Set all pointers values needed by SCRIPTS. */ - sym_setup_data_pointers(np, cp, dir); + cp->phys.head.lastp = cpu_to_scr(lastp); + cp->phys.head.savep = cpu_to_scr(lastp); + cp->startp = cp->phys.head.savep; + cp->goalp = cpu_to_scr(goalp); /* * When `#ifed 1', the code below makes the driver |