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…
749 static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_wait_ready()  argument
768 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_ready()
769 	*aSRpnt = SRpnt;  in osst_wait_ready()
791 	*aSRpnt = SRpnt;  in osst_wait_ready()
796 	     osst_write_error_recovery(STp, aSRpnt, 0) ) {  in osst_wait_ready()
814 static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned tim…  in osst_wait_for_medium()  argument
829 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_for_medium()
830 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
849 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
869 static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, in…  in osst_position_tape_and_confirm()  argument
873 	osst_wait_ready(STp, aSRpnt, 15 * 60, 0);			/* TODO - can this catch a write error? */  in osst_position_tape_and_confirm()
874 	retval = osst_set_frame_position(STp, aSRpnt, frame, 0);  in osst_position_tape_and_confirm()
876 	osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_position_tape_and_confirm()
877 	return (osst_get_frame_position(STp, aSRpnt));  in osst_position_tape_and_confirm()
883 static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_flush_drive_buffer()  argument
899 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_flush_drive_buffer()
900 	*aSRpnt = SRpnt;  in osst_flush_drive_buffer()
908 			result = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_flush_drive_buffer()
910 	result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay);  in osst_flush_drive_buffer()
917 static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int min…  in osst_wait_frame()  argument
930 		result = osst_get_frame_position(STp, aSRpnt);  in osst_wait_frame()
932 			if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0)  in osst_wait_frame()
972 static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writi…  in osst_recover_wait_frame()  argument
990 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout,  in osst_recover_wait_frame()
998 				retval = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_recover_wait_frame()
1020 					(*aSRpnt)->sense[ 2] & 0x0f,  in osst_recover_wait_frame()
1021 					(*aSRpnt)->sense[12],  in osst_recover_wait_frame()
1022 					(*aSRpnt)->sense[13]);  in osst_recover_wait_frame()
1030 static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout)  in osst_read_frame()  argument
1041 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout))  in osst_read_frame()
1042 			retval = osst_recover_wait_frame(STp, aSRpnt, 0);  in osst_read_frame()
1053 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE,  in osst_read_frame()
1055 	*aSRpnt = SRpnt;  in osst_read_frame()
1101 static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_initiate_read()  argument
1112                         osst_flush_write_buffer(STp, aSRpnt);  in osst_initiate_read()
1113 			osst_flush_drive_buffer(STp, aSRpnt);  in osst_initiate_read()
1129 		SRpnt   = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_initiate_read()
1130 		*aSRpnt = SRpnt;  in osst_initiate_read()
1138 static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_get_logical_frame()  argument
1166 				osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0);  in osst_get_logical_frame()
1181 		if ( osst_initiate_read(STp, aSRpnt)  in osst_get_logical_frame()
1182                 || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) {  in osst_get_logical_frame()
1185 			position = osst_get_frame_position(STp, aSRpnt);  in osst_get_logical_frame()
1200 			osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1221 			        	position = osst_get_frame_position(STp, aSRpnt)  in osst_get_logical_frame()
1233                         	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1239 		if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) {  in osst_get_logical_frame()
1243 			osst_set_frame_position(STp, aSRpnt, 0xbb8, 0);  in osst_get_logical_frame()
1267 static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical…  in osst_seek_logical_blk()  argument
1301 	   osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0);  in osst_seek_logical_blk()
1302 	   if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) {  in osst_seek_logical_blk()
1348 	   if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0)  in osst_seek_logical_blk()
1376 static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_get_sector()  argument
1399 		sector = osst_get_frame_position(STp, aSRpnt);  in osst_get_sector()
1406 static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector)  in osst_seek_sector()  argument
1422 		return (osst_set_frame_position(STp, aSRpnt, frame, 0));  in osst_seek_sector()
1424 	r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0);  in osst_seek_sector()
1427 	r = osst_get_logical_frame(STp, aSRpnt, -1, 1);  in osst_seek_sector()
1430 	if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO);  in osst_seek_sector()
1469 static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_read_back_buffer_and_rewrite()  argument
1472 	struct osst_request   * SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1516 			*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1526 	*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1527 	osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1550 			osst_set_frame_position(STp, aSRpnt, new_frame + i, 0);  in osst_read_back_buffer_and_rewrite()
1551 			osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE);  in osst_read_back_buffer_and_rewrite()
1552 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1553 			SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1632 		*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1649 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1667 static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_reposition_and_retry()  argument
1693 			osst_set_frame_position(STp, aSRpnt, frame + skip, 1);  in osst_reposition_and_retry()
1698 		if (osst_get_frame_position(STp, aSRpnt) < 0) {		/* additional write error */  in osst_reposition_and_retry()
1718 			SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE,  in osst_reposition_and_retry()
1720 			*aSRpnt = SRpnt;  in osst_reposition_and_retry()
1770 static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pen…  in osst_write_error_recovery()  argument
1772 	struct osst_request * SRpnt  = * aSRpnt;  in osst_write_error_recovery()
1799 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1812 			retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1814 			retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1822 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1827 		retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending);  in osst_write_error_recovery()
1831 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1833 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1849 static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_backward()  argument
1859 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1891 			osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1892 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1918 		osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1920 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1948 …c int osst_space_over_filemarks_forward_slow(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_forward_slow()  argument
1957 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1964 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
2002 …c int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_forward_fast()  argument
2012 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2048 			return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2050 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2051 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2088 					return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2090 				osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2091 				if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2105 				if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0)  in osst_space_over_filemarks_forward_fast()
2117 				return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt);  in osst_space_over_filemarks_forward_fast()
2122 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2124 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2153 static void osst_set_retries(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries)  in osst_set_retries()  argument
2156 	struct osst_request   * SRpnt  = * aSRpnt;  in osst_set_retries()
2177 	*aSRpnt = SRpnt;  in osst_set_retries()
2185 static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_filemark()  argument
2202 	result  = osst_flush_write_buffer(STp, aSRpnt);  in osst_write_filemark()
2203 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filemark()
2213 static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_eod()  argument
2230 	result  = osst_flush_write_buffer(STp, aSRpnt);	  in osst_write_eod()
2231 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_eod()
2236 static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int …  in osst_write_filler()  argument
2243 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in osst_write_filler()
2244 	osst_set_frame_position(STp, aSRpnt, where, 0);  in osst_write_filler()
2250 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in osst_write_filler()
2258 	return osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filler()
2261 static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, in…  in __osst_write_header()  argument
2269 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in __osst_write_header()
2270 	osst_set_frame_position(STp, aSRpnt, where, 0);  in __osst_write_header()
2276 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in __osst_write_header()
2281 	result = osst_flush_drive_buffer(STp, aSRpnt);  in __osst_write_header()
2288 static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod)  in osst_write_header()  argument
2340 	result  = __osst_write_header(STp, aSRpnt, 0xbae, 5);  in osst_write_header()
2342 		    osst_write_filler(STp, aSRpnt, 0xbb3, 5);  in osst_write_header()
2343 	result &= __osst_write_header(STp, aSRpnt,     5, 5);  in osst_write_header()
2349 		osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0);  in osst_write_header()
2362 static int osst_reset_header(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_reset_header()  argument
2372 	return osst_write_header(STp, aSRpnt, 1);  in osst_reset_header()
2375 static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos)  in __osst_analyze_headers()  argument
2388 		if (osst_set_frame_position(STp, aSRpnt, ppos, 0))  in __osst_analyze_headers()
2390 		osst_wait_ready(STp, aSRpnt, 60 * 15, 0);  in __osst_analyze_headers()
2391 		if (osst_initiate_read (STp, aSRpnt)) {  in __osst_analyze_headers()
2396 	if (osst_read_frame(STp, aSRpnt, 180)) {  in __osst_analyze_headers()
2552 static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_analyze_headers()  argument
2559 	position = osst_get_frame_position(STp, aSRpnt);  in osst_analyze_headers()
2581 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2588 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2594 		osst_set_frame_position(STp, aSRpnt, 10, 0);  in osst_analyze_headers()
2601 	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_analyze_headers()
2607 static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_verify_position()  argument
2621 	osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2622 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_verify_position()
2649 		osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2683 static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_configure_onstream()  argument
2687 	struct osst_request          * SRpnt = * aSRpnt;  in osst_configure_onstream()
2723 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2754 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2766 	osst_set_retries(STp, aSRpnt, 0);  in osst_configure_onstream()
2767 	SRpnt = * aSRpnt;  in osst_configure_onstream()
2794 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2809 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2829 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2854 static int cross_eof(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward)  in cross_eof()  argument
2867 	   result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1);  in cross_eof()
2871 	   result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1);  in cross_eof()
2883 static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_get_frame_position()  argument
2902 	SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, DMA_FROM_DEVICE,  in osst_get_frame_position()
2908 	*aSRpnt = SRpnt;  in osst_get_frame_position()
2967 static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, …  in osst_set_frame_position()  argument
3001 		SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout,  in osst_set_frame_position()
3005 		*aSRpnt  = SRpnt;  in osst_set_frame_position()
3015 			osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_set_frame_position()
3025 static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EO…  in osst_write_trailer()  argument
3032 		result = osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_trailer()
3034 		result = osst_write_filemark(STp, aSRpnt);  in osst_write_trailer()
3041 	result = osst_write_eod(STp, aSRpnt);  in osst_write_trailer()
3042 	osst_write_header(STp, aSRpnt, leave_at_EOT);  in osst_write_trailer()
3052 static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_flush_write_buffer()  argument
3057 	struct osst_request   * SRpnt = *aSRpnt;  in osst_flush_write_buffer()
3067 			*aSRpnt = SRpnt = NULL;  in osst_flush_write_buffer()
3100 			if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120))  in osst_flush_write_buffer()
3101 				result = osst_recover_wait_frame(STp, aSRpnt, 1);  in osst_flush_write_buffer()
3139 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE,  in osst_flush_write_buffer()
3141 		*aSRpnt = SRpnt;  in osst_flush_write_buffer()
3160 				if (osst_write_error_recovery(STp, aSRpnt, 1)) {  in osst_flush_write_buffer()
3182 static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next)  in osst_flush_buffer()  argument
3203 		return osst_flush_write_buffer(STp, aSRpnt);  in osst_flush_buffer()
3222 			result = cross_eof(STp, aSRpnt, 0); /* Back over the EOF hit */  in osst_flush_buffer()
3232 			result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace);  in osst_flush_buffer()
3244 static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous)  in osst_write_frame()  argument
3257 		if (osst_flush_drive_buffer(STp, aSRpnt) < 0) {  in osst_write_frame()
3261 		if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) {  in osst_write_frame()
3265 		osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8);  in osst_write_frame()
3270 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120))  in osst_write_frame()
3271 			if (osst_recover_wait_frame(STp, aSRpnt, 1))  in osst_write_frame()
3296 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout,  in osst_write_frame()
3300 	*aSRpnt = SRpnt;  in osst_write_frame()
3314 				if (osst_write_error_recovery(STp, aSRpnt, 1))  in osst_write_frame()
4054 static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_int_ioctl()  argument
4062 	struct osst_request   * SRpnt = * aSRpnt;  in osst_int_ioctl()
4433 	*aSRpnt = SRpnt;  in osst_int_ioctl()