Hello,
for some time i asked for comments on moving sg_request into a own header file into include/scsi/sg_request.h. Now this time i also have a real implementation :-)
OK, this is a part of the queuecommand function, which uses the sg_request to change some flags for the request:
#ifdef CONFIG_I2O_EXT_ADAPTEC if (c->adaptec) { u32 adpt_flags = 0;
if (SCpnt->sc_request && SCpnt->sc_request->upper_private_data) {
i2o_sg_io_hdr_t __user *usr_ptr =
((Sg_request *) (SCpnt->sc_request->
upper_private_data))->header.
usr_ptr;if (usr_ptr) get_user(adpt_flags, &usr_ptr->flags); }
switch (i2o_dev->lct_data.class_id) {
case I2O_CLASS_EXECUTIVE:
case I2O_CLASS_RANDOM_BLOCK_STORAGE:
/* interpret flag has to be set for executive */
adpt_flags ^= I2O_DPT_SG_FLAG_INTERPRET;
break;default: break; }
/* * for Adaptec controllers we use the PRIVATE command, because * the normal SCSI EXEC doesn't support all SCSI commands on * all controllers (for example READ CAPACITY). */ if (sgl_offset == SGL_OFFSET_10) sgl_offset = SGL_OFFSET_12; cmd = I2O_CMD_PRIVATE << 24; writel(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC, mptr++); writel(adpt_flags | tid, mptr++); } #endif
and here is the sg_request.h header:
static Scsi_Request *dummy_cmdp;
typedef struct sg_scatter_hold {
unsigned short k_use_sg;
unsigned short sglist_len;
unsigned bufflen;
unsigned b_malloc_len;
void *buffer;
char dio_in_use;
unsigned char cmd_opcode;
} Sg_scatter_hold;typedef struct sg_request {
Scsi_Request *my_cmdp;
struct sg_request *nextrp;
struct sg_fd *parentfp;
Sg_scatter_hold data;
sg_io_hdr_t header;
unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)];
char res_used;
char orphan;
char sg_io_owned;
volatile char done;
} Sg_request;So please if you have anything against it, or know a better solution how a program could get some information to the LLD (at least 2 bits so far), please let me know...
Thank you very much in advance.
Best regards,
Markus Lidel ------------------------------------------ Markus Lidel (Senior IT Consultant)
Shadow Connect GmbH Carl-Reisch-Weg 12 D-86381 Krumbach Germany
Phone: +49 82 82/99 51-0 Fax: +49 82 82/99 51-11
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