183 static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt,
186 static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame,…
188 static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt);
190 static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt);
192 static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pen…
752 static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_wait_ready()  argument
771 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_ready()
772 	*aSRpnt = SRpnt;  in osst_wait_ready()
794 	*aSRpnt = SRpnt;  in osst_wait_ready()
799 	     osst_write_error_recovery(STp, aSRpnt, 0) ) {  in osst_wait_ready()
817 static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned tim…  in osst_wait_for_medium()  argument
832 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_for_medium()
833 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
852 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
872 static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, in…  in osst_position_tape_and_confirm()  argument
876 	osst_wait_ready(STp, aSRpnt, 15 * 60, 0);			/* TODO - can this catch a write error? */  in osst_position_tape_and_confirm()
877 	retval = osst_set_frame_position(STp, aSRpnt, frame, 0);  in osst_position_tape_and_confirm()
879 	osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_position_tape_and_confirm()
880 	return (osst_get_frame_position(STp, aSRpnt));  in osst_position_tape_and_confirm()
886 static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_flush_drive_buffer()  argument
902 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_flush_drive_buffer()
903 	*aSRpnt = SRpnt;  in osst_flush_drive_buffer()
911 			result = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_flush_drive_buffer()
913 	result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay);  in osst_flush_drive_buffer()
920 static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int min…  in osst_wait_frame()  argument
933 		result = osst_get_frame_position(STp, aSRpnt);  in osst_wait_frame()
935 			if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0)  in osst_wait_frame()
975 static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writi…  in osst_recover_wait_frame()  argument
993 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout,  in osst_recover_wait_frame()
1001 				retval = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_recover_wait_frame()
1023 					(*aSRpnt)->sense[ 2] & 0x0f,  in osst_recover_wait_frame()
1024 					(*aSRpnt)->sense[12],  in osst_recover_wait_frame()
1025 					(*aSRpnt)->sense[13]);  in osst_recover_wait_frame()
1033 static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout)  in osst_read_frame()  argument
1044 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout))  in osst_read_frame()
1045 			retval = osst_recover_wait_frame(STp, aSRpnt, 0);  in osst_read_frame()
1056 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE,  in osst_read_frame()
1058 	*aSRpnt = SRpnt;  in osst_read_frame()
1104 static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_initiate_read()  argument
1115                         osst_flush_write_buffer(STp, aSRpnt);  in osst_initiate_read()
1116 			osst_flush_drive_buffer(STp, aSRpnt);  in osst_initiate_read()
1132 		SRpnt   = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_initiate_read()
1133 		*aSRpnt = SRpnt;  in osst_initiate_read()
1141 static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_get_logical_frame()  argument
1169 				osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0);  in osst_get_logical_frame()
1184 		if ( osst_initiate_read(STp, aSRpnt)  in osst_get_logical_frame()
1185                 || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) {  in osst_get_logical_frame()
1188 			position = osst_get_frame_position(STp, aSRpnt);  in osst_get_logical_frame()
1203 			osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1224 			        	position = osst_get_frame_position(STp, aSRpnt)  in osst_get_logical_frame()
1236                         	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1242 		if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) {  in osst_get_logical_frame()
1246 			osst_set_frame_position(STp, aSRpnt, 0xbb8, 0);  in osst_get_logical_frame()
1270 static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical…  in osst_seek_logical_blk()  argument
1304 	   osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0);  in osst_seek_logical_blk()
1305 	   if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) {  in osst_seek_logical_blk()
1351 	   if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0)  in osst_seek_logical_blk()
1379 static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_get_sector()  argument
1402 		sector = osst_get_frame_position(STp, aSRpnt);  in osst_get_sector()
1409 static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector)  in osst_seek_sector()  argument
1425 		return (osst_set_frame_position(STp, aSRpnt, frame, 0));  in osst_seek_sector()
1427 	r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0);  in osst_seek_sector()
1430 	r = osst_get_logical_frame(STp, aSRpnt, -1, 1);  in osst_seek_sector()
1433 	if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO);  in osst_seek_sector()
1472 static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_read_back_buffer_and_rewrite()  argument
1475 	struct osst_request   * SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1519 			*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1529 	*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1530 	osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1553 			osst_set_frame_position(STp, aSRpnt, new_frame + i, 0);  in osst_read_back_buffer_and_rewrite()
1554 			osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE);  in osst_read_back_buffer_and_rewrite()
1555 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1556 			SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1635 		*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1652 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1670 static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_reposition_and_retry()  argument
1696 			osst_set_frame_position(STp, aSRpnt, frame + skip, 1);  in osst_reposition_and_retry()
1701 		if (osst_get_frame_position(STp, aSRpnt) < 0) {		/* additional write error */  in osst_reposition_and_retry()
1721 			SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE,  in osst_reposition_and_retry()
1723 			*aSRpnt = SRpnt;  in osst_reposition_and_retry()
1773 static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pen…  in osst_write_error_recovery()  argument
1775 	struct osst_request * SRpnt  = * aSRpnt;  in osst_write_error_recovery()
1802 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1815 			retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1817 			retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1825 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1830 		retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending);  in osst_write_error_recovery()
1834 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1836 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1852 static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_backward()  argument
1862 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1894 			osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1895 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1921 		osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1923 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1951 …c int osst_space_over_filemarks_forward_slow(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_forward_slow()  argument
1960 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1967 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
2005 …c int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_forward_fast()  argument
2015 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2051 			return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2053 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2054 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2091 					return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2093 				osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2094 				if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2108 				if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0)  in osst_space_over_filemarks_forward_fast()
2120 				return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt);  in osst_space_over_filemarks_forward_fast()
2125 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2127 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2156 static void osst_set_retries(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries)  in osst_set_retries()  argument
2159 	struct osst_request   * SRpnt  = * aSRpnt;  in osst_set_retries()
2180 	*aSRpnt = SRpnt;  in osst_set_retries()
2188 static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_filemark()  argument
2205 	result  = osst_flush_write_buffer(STp, aSRpnt);  in osst_write_filemark()
2206 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filemark()
2216 static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_eod()  argument
2233 	result  = osst_flush_write_buffer(STp, aSRpnt);	  in osst_write_eod()
2234 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_eod()
2239 static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int …  in osst_write_filler()  argument
2246 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in osst_write_filler()
2247 	osst_set_frame_position(STp, aSRpnt, where, 0);  in osst_write_filler()
2253 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in osst_write_filler()
2261 	return osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filler()
2264 static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, in…  in __osst_write_header()  argument
2272 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in __osst_write_header()
2273 	osst_set_frame_position(STp, aSRpnt, where, 0);  in __osst_write_header()
2279 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in __osst_write_header()
2284 	result = osst_flush_drive_buffer(STp, aSRpnt);  in __osst_write_header()
2291 static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod)  in osst_write_header()  argument
2343 	result  = __osst_write_header(STp, aSRpnt, 0xbae, 5);  in osst_write_header()
2345 		    osst_write_filler(STp, aSRpnt, 0xbb3, 5);  in osst_write_header()
2346 	result &= __osst_write_header(STp, aSRpnt,     5, 5);  in osst_write_header()
2352 		osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0);  in osst_write_header()
2365 static int osst_reset_header(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_reset_header()  argument
2375 	return osst_write_header(STp, aSRpnt, 1);  in osst_reset_header()
2378 static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos)  in __osst_analyze_headers()  argument
2391 		if (osst_set_frame_position(STp, aSRpnt, ppos, 0))  in __osst_analyze_headers()
2393 		osst_wait_ready(STp, aSRpnt, 60 * 15, 0);  in __osst_analyze_headers()
2394 		if (osst_initiate_read (STp, aSRpnt)) {  in __osst_analyze_headers()
2399 	if (osst_read_frame(STp, aSRpnt, 180)) {  in __osst_analyze_headers()
2555 static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_analyze_headers()  argument
2562 	position = osst_get_frame_position(STp, aSRpnt);  in osst_analyze_headers()
2584 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2591 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2597 		osst_set_frame_position(STp, aSRpnt, 10, 0);  in osst_analyze_headers()
2604 	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_analyze_headers()
2610 static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_verify_position()  argument
2624 	osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2625 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_verify_position()
2652 		osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2686 static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_configure_onstream()  argument
2690 	struct osst_request          * SRpnt = * aSRpnt;  in osst_configure_onstream()
2726 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2757 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2769 	osst_set_retries(STp, aSRpnt, 0);  in osst_configure_onstream()
2770 	SRpnt = * aSRpnt;  in osst_configure_onstream()
2797 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2812 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2832 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2857 static int cross_eof(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward)  in cross_eof()  argument
2870 	   result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1);  in cross_eof()
2874 	   result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1);  in cross_eof()
2886 static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_get_frame_position()  argument
2905 	SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, DMA_FROM_DEVICE,  in osst_get_frame_position()
2911 	*aSRpnt = SRpnt;  in osst_get_frame_position()
2970 static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, …  in osst_set_frame_position()  argument
3004 		SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout,  in osst_set_frame_position()
3008 		*aSRpnt  = SRpnt;  in osst_set_frame_position()
3018 			osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_set_frame_position()
3028 static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EO…  in osst_write_trailer()  argument
3035 		result = osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_trailer()
3037 		result = osst_write_filemark(STp, aSRpnt);  in osst_write_trailer()
3044 	result = osst_write_eod(STp, aSRpnt);  in osst_write_trailer()
3045 	osst_write_header(STp, aSRpnt, leave_at_EOT);  in osst_write_trailer()
3055 static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_flush_write_buffer()  argument
3060 	struct osst_request   * SRpnt = *aSRpnt;  in osst_flush_write_buffer()
3070 			*aSRpnt = SRpnt = NULL;  in osst_flush_write_buffer()
3103 			if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120))  in osst_flush_write_buffer()
3104 				result = osst_recover_wait_frame(STp, aSRpnt, 1);  in osst_flush_write_buffer()
3142 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE,  in osst_flush_write_buffer()
3144 		*aSRpnt = SRpnt;  in osst_flush_write_buffer()
3163 				if (osst_write_error_recovery(STp, aSRpnt, 1)) {  in osst_flush_write_buffer()
3185 static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next)  in osst_flush_buffer()  argument
3206 		return osst_flush_write_buffer(STp, aSRpnt);  in osst_flush_buffer()
3225 			result = cross_eof(STp, aSRpnt, 0); /* Back over the EOF hit */  in osst_flush_buffer()
3235 			result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace);  in osst_flush_buffer()
3247 static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous)  in osst_write_frame()  argument
3260 		if (osst_flush_drive_buffer(STp, aSRpnt) < 0) {  in osst_write_frame()
3264 		if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) {  in osst_write_frame()
3268 		osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8);  in osst_write_frame()
3273 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120))  in osst_write_frame()
3274 			if (osst_recover_wait_frame(STp, aSRpnt, 1))  in osst_write_frame()
3299 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout,  in osst_write_frame()
3303 	*aSRpnt = SRpnt;  in osst_write_frame()
3317 				if (osst_write_error_recovery(STp, aSRpnt, 1))  in osst_write_frame()
4057 static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_int_ioctl()  argument
4065 	struct osst_request   * SRpnt = * aSRpnt;  in osst_int_ioctl()
4436 	*aSRpnt = SRpnt;  in osst_int_ioctl()