diff options
| -rw-r--r-- | drivers/scsi/st.c | 254 | ||||
| -rw-r--r-- | drivers/scsi/st.h | 14 |
2 files changed, 123 insertions, 145 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 053444b027d4..26e13dc7bcdb 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -50,7 +50,6 @@ static const char *verstr = "20050830"; #include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_ioctl.h> -#include <scsi/scsi_request.h> #include <scsi/sg.h> @@ -188,8 +187,6 @@ static int from_buffer(struct st_buffer *, char __user *, int); static void move_buffer_data(struct st_buffer *, int); static void buf_to_sg(struct st_buffer *, unsigned int); -static int st_map_user_pages(struct scatterlist *, const unsigned int, - unsigned long, size_t, int, unsigned long); static int sgl_map_user_pages(struct scatterlist *, const unsigned int, unsigned long, size_t, int); static int sgl_unmap_user_pages(struct scatterlist *, const unsigned int, int); @@ -313,12 +310,13 @@ static inline char *tape_name(struct scsi_tape *tape) } -static void st_analyze_sense(struct scsi_request *SRpnt, struct st_cmdstatus *s) +static void st_analyze_sense(struct st_request *SRpnt, struct st_cmdstatus *s) { const u8 *ucp; - const u8 *sense = SRpnt->sr_sense_buffer; + const u8 *sense = SRpnt->sense; - s->have_sense = scsi_request_normalize_sense(SRpnt, &s->sense_hdr); + s->have_sense = scsi_normalize_sense(SRpnt->sense, + SCSI_SENSE_BUFFERSIZE, &s->sense_hdr); s->flags = 0; if (s->have_sense) { @@ -345,9 +343,9 @@ static void st_analyze_sense(struct scsi_request *SRpnt, struct st_cmdstatus *s) /* Convert the result to success code */ -static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) +static int st_chk_result(struct scsi_tape *STp, struct st_request * SRpnt) { - int result = SRpnt->sr_result; + int result = SRpnt->result; u8 scode; DEB(const char *stp;) char *name = tape_name(STp); @@ -366,13 +364,12 @@ static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) DEB( if (debugging) { - printk(ST_DEB_MSG "%s: Error: %x, cmd: %x %x %x %x %x %x Len: %d\n", + printk(ST_DEB_MSG "%s: Error: %x, cmd: %x %x %x %x %x %x\n", name, result, - SRpnt->sr_cmnd[0], SRpnt->sr_cmnd[1], SRpnt->sr_cmnd[2], - SRpnt->sr_cmnd[3], SRpnt->sr_cmnd[4], SRpnt->sr_cmnd[5], - SRpnt->sr_bufflen); + SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2], + SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]); if (cmdstatp->have_sense) - scsi_print_req_sense("st", SRpnt); + __scsi_print_sense("st", SRpnt->sense, SCSI_SENSE_BUFFERSIZE); } ) /* end DEB */ if (!debugging) { /* Abnormal conditions for tape */ if (!cmdstatp->have_sense) @@ -386,20 +383,21 @@ static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) /* scode != UNIT_ATTENTION && */ scode != BLANK_CHECK && scode != VOLUME_OVERFLOW && - SRpnt->sr_cmnd[0] != MODE_SENSE && - SRpnt->sr_cmnd[0] != TEST_UNIT_READY) { + SRpnt->cmd[0] != MODE_SENSE && + SRpnt->cmd[0] != TEST_UNIT_READY) { printk(KERN_WARNING "%s: Error with sense data: ", name); - scsi_print_req_sense("st", SRpnt); + __scsi_print_sense("st", SRpnt->sense, + SCSI_SENSE_BUFFERSIZE); } } if (cmdstatp->fixed_format && STp->cln_mode >= EXTENDED_SENSE_START) { /* Only fixed format sense */ if (STp->cln_sense_value) - STp->cleaning_req |= ((SRpnt->sr_sense_buffer[STp->cln_mode] & + STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] & STp->cln_sense_mask) == STp->cln_sense_value); else - STp->cleaning_req |= ((SRpnt->sr_sense_buffer[STp->cln_mode] & + STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] & STp->cln_sense_mask) != 0); } if (cmdstatp->have_sense && @@ -411,8 +409,8 @@ static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) if (cmdstatp->have_sense && scode == RECOVERED_ERROR #if ST_RECOVERED_WRITE_FATAL - && SRpnt->sr_cmnd[0] != WRITE_6 - && SRpnt->sr_cmnd[0] != WRITE_FILEMARKS + && SRpnt->cmd[0] != WRITE_6 + && SRpnt->cmd[0] != WRITE_FILEMARKS #endif ) { STp->recover_count++; @@ -420,9 +418,9 @@ static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) DEB( if (debugging) { - if (SRpnt->sr_cmnd[0] == READ_6) + if (SRpnt->cmd[0] == READ_6) stp = "read"; - else if (SRpnt->sr_cmnd[0] == WRITE_6) + else if (SRpnt->cmd[0] == WRITE_6) stp = "write"; else stp = "ioctl"; @@ -438,28 +436,37 @@ static int st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt) /* Wakeup from interrupt */ -static void st_sleep_done(struct scsi_cmnd * SCpnt) +static void st_sleep_done(void *data, char *sense, int result, int resid) { - struct scsi_tape *STp = container_of(SCpnt->request->rq_disk->private_data, - struct scsi_tape, driver); + struct st_request *SRpnt = data; + struct scsi_tape *STp = SRpnt->stp; - (STp->buffer)->cmdstat.midlevel_result = SCpnt->result; - SCpnt->request->rq_status = RQ_SCSI_DONE; + memcpy(SRpnt->sense, sense, SCSI_SENSE_BUFFERSIZE); + (STp->buffer)->cmdstat.midlevel_result = SRpnt->result = result; DEB( STp->write_pending = 0; ) - if (SCpnt->request->waiting) - complete(SCpnt->request->waiting); + if (SRpnt->waiting) + complete(SRpnt->waiting); +} + +static struct st_request *st_allocate_request(void) +{ + return kzalloc(sizeof(struct st_request), GFP_KERNEL); +} + +static void st_release_request(struct st_request *streq) +{ + kfree(streq); } /* Do the scsi command. Waits until command performed if do_wait is true. Otherwise write_behind_check() is used to check that the command has finished. */ -static struct scsi_request * -st_do_scsi(struct scsi_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd, +static struct st_request * +st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) { struct completion *waiting; - unsigned char *bp; /* if async, make sure there's no command outstanding */ if (!do_wait && ((STp->buffer)->last_SRpnt)) { @@ -473,7 +480,7 @@ st_do_scsi(struct scsi_request * SRpnt, struct scsi_tape * STp, unsigned char *c } if (SRpnt == NULL) { - SRpnt = scsi_allocate_request(STp->device, GFP_ATOMIC); + SRpnt = st_allocate_request(); if (SRpnt == NULL) { DEBC( printk(KERN_ERR "%s: Can't get SCSI request.\n", tape_name(STp)); ); @@ -483,6 +490,7 @@ st_do_scsi(struct scsi_request * SRpnt, struct scsi_tape * STp, unsigned char *c (STp->buffer)->syscall_result = (-EBUSY); return NULL; } + SRpnt->stp = STp; } /* If async IO, set last_SRpnt. This ptr tells write_behind_check @@ -492,32 +500,26 @@ st_do_scsi(struct scsi_request * SRpnt, struct scsi_tape * STp, unsigned char *c waiting = &STp->wait; init_completion(waiting); - SRpnt->sr_use_sg = STp->buffer->do_dio || (bytes > (STp->buffer)->frp[0].length); - if (SRpnt->sr_use_sg) { - if (!STp->buffer->do_dio) - buf_to_sg(STp->buffer, bytes); - SRpnt->sr_use_sg = (STp->buffer)->sg_segs; - bp = (char *) &((STp->buffer)->sg[0]); - } else - bp = (STp->buffer)->b_data; - SRpnt->sr_data_direction = direction; - SRpnt->sr_cmd_len = 0; - SRpnt->sr_request->waiting = waiting; - SRpnt->sr_request->rq_status = RQ_SCSI_BUSY; - SRpnt->sr_request->rq_disk = STp->disk; - SRpnt->sr_request->end_io = blk_end_sync_rq; - STp->buffer->cmdstat.have_sense = 0; + SRpnt->waiting = waiting; - scsi_do_req(SRpnt, (void *) cmd, bp, bytes, - st_sleep_done, timeout, retries); + if (!STp->buffer->do_dio) + buf_to_sg(STp->buffer, bytes); - if (do_wait) { + memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); + STp->buffer->cmdstat.have_sense = 0; + STp->buffer->syscall_result = 0; + + if (scsi_execute_async(STp->device, cmd, direction, + &((STp->buffer)->sg[0]), bytes, (STp->buffer)->sg_segs, + timeout, retries, SRpnt, st_sleep_done, GFP_KERNEL)) + /* could not allocate the buffer or request was too large */ + (STp->buffer)->syscall_result = (-EBUSY); + else if (do_wait) { wait_for_completion(waiting); - SRpnt->sr_request->waiting = NULL; - if (SRpnt->sr_request->rq_status != RQ_SCSI_DONE) - SRpnt->sr_result |= (DRIVER_ERROR << 24); + SRpnt->waiting = NULL; (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); } + return SRpnt; } @@ -532,7 +534,7 @@ static int write_behind_check(struct scsi_tape * STp) struct st_buffer *STbuffer; struct st_partstat *STps; struct st_cmdstatus *cmdstatp; - struct scsi_request *SRpnt; + struct st_request *SRpnt; STbuffer = STp->buffer; if (!STbuffer->writing) @@ -548,12 +550,10 @@ static int write_behind_check(struct scsi_tape * STp) wait_for_completion(&(STp->wait)); SRpnt = STbuffer->last_SRpnt; STbuffer->last_SRpnt = NULL; - SRpnt->sr_request->waiting = NULL; - if (SRpnt->sr_request->rq_status != RQ_SCSI_DONE) - SRpnt->sr_result |= (DRIVER_ERROR << 24); + SRpnt->waiting = NULL; (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); - scsi_release_request(SRpnt); + st_release_request(SRpnt); STbuffer->buffer_bytes -= STbuffer->writing; STps = &(STp->ps[STp->partition]); @@ -593,7 +593,7 @@ static int write_behind_check(struct scsi_tape * STp) it messes up the block number). */ static int cross_eof(struct scsi_tape * STp, int forward) { - struct scsi_request *SRpnt; + struct st_request *SRpnt; unsigned char cmd[MAX_COMMAND_SIZE]; cmd[0] = SPACE; @@ -613,7 +613,7 @@ static int cross_eof(struct scsi_tape * STp, int forward) if (!SRpnt) return (STp->buffer)->syscall_result; - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; if ((STp->buffer)->cmdstat.midlevel_result != 0) @@ -630,7 +630,7 @@ static int flush_write_buffer(struct scsi_tape * STp) int offset, transfer, blks; int result; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; struct st_partstat *STps; result = write_behind_check(STp); @@ -688,7 +688,7 @@ static int flush_write_buffer(struct scsi_tape * STp) STp->dirty = 0; (STp->buffer)->buffer_bytes = 0; } - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; } return result; @@ -785,7 +785,7 @@ static int set_mode_densblk(struct scsi_tape * STp, struct st_modedef * STm) } -/* Lock or unlock the drive door. Don't use when scsi_request allocated. */ +/* Lock or unlock the drive door. Don't use when st_request allocated. */ static int do_door_lock(struct scsi_tape * STp, int do_lock) { int retval, cmd; @@ -844,7 +844,7 @@ static int test_ready(struct scsi_tape *STp, int do_wait) int attentions, waits, max_wait, scode; int retval = CHKRES_READY, new_session = 0; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; max_wait = do_wait ? ST_BLOCK_SECONDS : 0; @@ -903,7 +903,7 @@ static int test_ready(struct scsi_tape *STp, int do_wait) } if (SRpnt != NULL) - scsi_release_request(SRpnt); + st_release_request(SRpnt); return retval; } @@ -918,7 +918,7 @@ static int check_tape(struct scsi_tape *STp, struct file *filp) int i, retval, new_session = 0, do_wait; unsigned char cmd[MAX_COMMAND_SIZE], saved_cleaning; unsigned short st_flags = filp->f_flags; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; struct st_modedef *STm; struct st_partstat *STps; char *name = tape_name(STp); @@ -993,7 +993,7 @@ static int check_tape(struct scsi_tape *STp, struct file *filp) goto err_out; } - if (!SRpnt->sr_result && !STp->buffer->cmdstat.have_sense) { + if (!SRpnt->result && !STp->buffer->cmdstat.have_sense) { STp->max_block = ((STp->buffer)->b_data[1] << 16) | ((STp->buffer)->b_data[2] << 8) | (STp->buffer)->b_data[3]; STp->min_block = ((STp->buffer)->b_data[4] << 8) | @@ -1045,7 +1045,7 @@ static int check_tape(struct scsi_tape *STp, struct file *filp) } STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0; } - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; STp->inited = 1; @@ -1196,7 +1196,7 @@ static int st_flush(struct file *filp) { int result = 0, result2; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; struct scsi_tape *STp = filp->private_data; struct st_modedef *STm = &(STp->modes[STp->current_mode]); struct st_partstat *STps = &(STp->ps[STp->partition]); @@ -1249,7 +1249,7 @@ static int st_flush(struct file *filp) cmdstatp->sense_hdr.sense_key == RECOVERED_ERROR) && (!cmdstatp->remainder_valid || cmdstatp->uremainder64 == 0))) { /* Write successful at EOM */ - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; if (STps->drv_file >= 0) STps->drv_file++; @@ -1259,7 +1259,7 @@ static int st_flush(struct file *filp) STps->eof = ST_FM; } else { /* Write error */ - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; printk(KERN_ERR "%s: Error on write filemark.\n", name); if (result == 0) @@ -1400,11 +1400,11 @@ static int setup_buffering(struct scsi_tape *STp, const char __user *buf, i = STp->try_dio && try_rdio; else i = STp->try_dio && try_wdio; + if (i && ((unsigned long)buf & queue_dma_alignment( STp->device->request_queue)) == 0) { - i = st_map_user_pages(&(STbp->sg[0]), STbp->use_sg, - (unsigned long)buf, count, (is_read ? READ : WRITE), - STp->max_pfn); + i = sgl_map_user_pages(&(STbp->sg[0]), STbp->use_sg, + (unsigned long)buf, count, (is_read ? READ : WRITE)); if (i > 0) { STbp->do_dio = i; STbp->buffer_bytes = 0; /* can be used as transfer counter */ @@ -1472,7 +1472,7 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) int async_write; unsigned char cmd[MAX_COMMAND_SIZE]; const char __user *b_point; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; struct scsi_tape *STp = filp->private_data; struct st_modedef *STm; struct st_partstat *STps; @@ -1624,7 +1624,7 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) retval = STbp->syscall_result; goto out; } - if (async_write) { + if (async_write && !STbp->syscall_result) { STbp->writing = transfer; STp->dirty = !(STbp->writing == STbp->buffer_bytes); @@ -1698,7 +1698,7 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) } else { count += do_count; STps->drv_block = (-1); /* Too cautious? */ - retval = (-EIO); + retval = STbp->syscall_result; } } @@ -1728,7 +1728,7 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) out: if (SRpnt != NULL) - scsi_release_request(SRpnt); + st_release_request(SRpnt); release_buffering(STp); up(&STp->lock); @@ -1742,11 +1742,11 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) Does release user buffer mapping if it is set. */ static long read_tape(struct scsi_tape *STp, long count, - struct scsi_request ** aSRpnt) + struct st_request ** aSRpnt) { int transfer, blks, bytes; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; struct st_modedef *STm; struct st_partstat *STps; struct st_buffer *STbp; @@ -1802,10 +1802,10 @@ static long read_tape(struct scsi_tape *STp, long count, retval = 1; DEBC(printk(ST_DEB_MSG "%s: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n", name, - SRpnt->sr_sense_buffer[0], SRpnt->sr_sense_buffer[1], - SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[3], - SRpnt->sr_sense_buffer[4], SRpnt->sr_sense_buffer[5], - SRpnt->sr_sense_buffer[6], SRpnt->sr_sense_buffer[7])); + SRpnt->sense[0], SRpnt->sense[1], + SRpnt->sense[2], SRpnt->sense[3], + SRpnt->sense[4], SRpnt->sense[5], + SRpnt->sense[6], SRpnt->sense[7])); if (cmdstatp->have_sense) { if (cmdstatp->sense_hdr.sense_key == BLANK_CHECK) @@ -1835,7 +1835,7 @@ static long read_tape(struct scsi_tape *STp, long count, } STbp->buffer_bytes = bytes - transfer; } else { - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = *aSRpnt = NULL; if (transfer == blks) { /* We did not get anything, error */ printk(KERN_NOTICE "%s: Incorrect block size.\n", name); @@ -1929,7 +1929,7 @@ st_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos) ssize_t retval = 0; ssize_t i, transfer; int special, do_dio = 0; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; struct scsi_tape *STp = filp->private_data; struct st_modedef *STm; struct st_partstat *STps; @@ -2054,7 +2054,7 @@ st_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos) out: if (SRpnt != NULL) { - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; } if (do_dio) { @@ -2284,7 +2284,7 @@ static int st_set_options(struct scsi_tape *STp, long options) static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs) { unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SENSE; @@ -2298,7 +2298,7 @@ static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs) if (SRpnt == NULL) return (STp->buffer)->syscall_result; - scsi_release_request(SRpnt); + st_release_request(SRpnt); return (STp->buffer)->syscall_result; } @@ -2310,7 +2310,7 @@ static int write_mode_page(struct scsi_tape *STp, int page, int slow) { int pgo; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt = NULL; + struct st_request *SRpnt = NULL; memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; @@ -2329,7 +2329,7 @@ static int write_mode_page(struct scsi_tape *STp, int page, int slow) if (SRpnt == NULL) return (STp->buffer)->syscall_result; - scsi_release_request(SRpnt); + st_release_request(SRpnt); return (STp->buffer)->syscall_result; } @@ -2412,7 +2412,7 @@ static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_cod DEB( char *name = tape_name(STp); ) unsigned char cmd[MAX_COMMAND_SIZE]; struct st_partstat *STps; - struct scsi_request *SRpnt; + struct st_request *SRpnt; if (STp->ready != ST_READY && !load_code) { if (STp->ready == ST_NO_TAPE) @@ -2455,7 +2455,7 @@ static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_cod return (STp->buffer)->syscall_result; retval = (STp->buffer)->syscall_result; - scsi_release_request(SRpnt); + st_release_request(SRpnt); if (!retval) { /* SCSI command successful */ @@ -2503,7 +2503,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon int ioctl_result; int chg_eof = 1; unsigned char cmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; struct st_partstat *STps; int fileno, blkno, at_sm, undone; int datalen = 0, direction = DMA_NONE; @@ -2757,7 +2757,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon ioctl_result = (STp->buffer)->syscall_result; if (!ioctl_result) { /* SCSI command successful */ - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; STps->drv_block = blkno; STps->drv_file = fileno; @@ -2872,7 +2872,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon /* Try the other possible state of Page Format if not already tried */ STp->use_pf = !STp->use_pf | PF_TESTED; - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; return st_int_ioctl(STp, cmd_in, arg); } @@ -2882,7 +2882,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon if (cmdstatp->sense_hdr.sense_key == BLANK_CHECK) STps->eof = ST_EOD; - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; } @@ -2898,7 +2898,7 @@ static int get_location(struct scsi_tape *STp, unsigned int *block, int *partiti { int result; unsigned char scmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; DEB( char *name = tape_name(STp); ) if (STp->ready != ST_READY) @@ -2944,7 +2944,7 @@ static int get_location(struct scsi_tape *STp, unsigned int *block, int *partiti DEBC(printk(ST_DEB_MSG "%s: Got tape pos. blk %d part %d.\n", name, *block, *partition)); } - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; return result; @@ -2961,7 +2961,7 @@ static int set_location(struct scsi_tape *STp, unsigned int block, int partition unsigned int blk; int timeout; unsigned char scmd[MAX_COMMAND_SIZE]; - struct scsi_request *SRpnt; + struct st_request *SRpnt; DEB( char *name = tape_name(STp); ) if (STp->ready != ST_READY) @@ -3047,7 +3047,7 @@ static int set_location(struct scsi_tape *STp, unsigned int block, int partition result = 0; } - scsi_release_request(SRpnt); + st_release_request(SRpnt); SRpnt = NULL; return result; @@ -3577,7 +3577,7 @@ static long st_compat_ioctl(struct file *file, unsigned int cmd, unsigned long a static struct st_buffer * new_tape_buffer(int from_initialization, int need_dma, int max_sg) { - int i, got = 0, segs = 0; + int i, got = 0; gfp_t priority; struct st_buffer *tb; @@ -3594,10 +3594,8 @@ static struct st_buffer * return NULL; } memset(tb, 0, i); - tb->frp_segs = tb->orig_frp_segs = segs; + tb->frp_segs = tb->orig_frp_segs = 0; tb->use_sg = max_sg; - if (segs > 0) - tb->b_data = page_address(tb->sg[0].page); tb->frp = (struct st_buf_fragment *)(&(tb->sg[0]) + max_sg); tb->in_use = 1; @@ -3628,7 +3626,7 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm priority = GFP_KERNEL | __GFP_NOWARN; if (need_dma) priority |= GFP_DMA; - for (b_size = PAGE_SIZE, order=0; + for (b_size = PAGE_SIZE, order=0; order <= 6 && b_size < new_size - STbuffer->buffer_size; order++, b_size *= 2) ; /* empty */ @@ -3670,6 +3668,7 @@ static void normalize_buffer(struct st_buffer * STbuffer) } STbuffer->frp_segs = STbuffer->orig_frp_segs; STbuffer->frp_sg_current = 0; + STbuffer->sg_segs = 0; } @@ -3882,7 +3881,6 @@ static int st_probe(struct device *dev) struct st_buffer *buffer; int i, j, mode, dev_num, error; char *stp; - u64 bounce_limit; if (SDp->type != TYPE_TAPE) return -ENODEV; @@ -3892,7 +3890,8 @@ static int st_probe(struct device *dev) return -ENODEV; } - i = SDp->host->sg_tablesize; + i = min(SDp->request_queue->max_hw_segments, + SDp->request_queue->max_phys_segments); if (st_max_sg_segs < i) i = st_max_sg_segs; buffer = new_tape_buffer(1, (SDp->host)->unchecked_isa_dma, i); @@ -3994,11 +3993,6 @@ static int st_probe(struct device *dev) tpnt->long_timeout = ST_LONG_TIMEOUT; tpnt->try_dio = try_direct_io && !SDp->host->unchecked_isa_dma; - bounce_limit = scsi_calculate_bounce_limit(SDp->host) >> PAGE_SHIFT; - if (bounce_limit > ULONG_MAX) - bounce_limit = ULONG_MAX; - tpnt->max_pfn = bounce_limit; - for (i = 0; i < ST_NBR_MODES; i++) { STm = &(tpnt->modes[i]); STm->defined = 0; @@ -4077,9 +4071,9 @@ static int st_probe(struct device *dev) sdev_printk(KERN_WARNING, SDp, "Attached scsi tape %s", tape_name(tpnt)); - printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B), max page reachable by HBA %lu\n", + printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B)\n", tape_name(tpnt), tpnt->try_dio ? "yes" : "no", - queue_dma_alignment(SDp->request_queue) + 1, tpnt->max_pfn); + queue_dma_alignment(SDp->request_queue) + 1); return 0; @@ -4411,34 +4405,6 @@ static void do_create_class_files(struct scsi_tape *STp, int dev_num, int mode) return; } - -/* Pin down user pages and put them into a scatter gather list. Returns <= 0 if - - mapping of all pages not successful - - any page is above max_pfn - (i.e., either completely successful or fails) -*/ -static int st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages, - unsigned long uaddr, size_t count, int rw, - unsigned long max_pfn) -{ - int i, nr_pages; - - nr_pages = sgl_map_user_pages(sgl, max_pages, uaddr, count, rw); - if (nr_pages <= 0) - return nr_pages; - - for (i=0; i < nr_pages; i++) { - if (page_to_pfn(sgl[i].page) > max_pfn) - goto out_unmap; - } - return nr_pages; - - out_unmap: - sgl_unmap_user_pages(sgl, nr_pages, 0); - return 0; -} - - /* The following functions may be useful for a larger audience. */ static int sgl_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages, unsigned long uaddr, size_t count, int rw) diff --git a/drivers/scsi/st.h b/drivers/scsi/st.h index 790acac160bc..411209048d74 100644 --- a/drivers/scsi/st.h +++ b/drivers/scsi/st.h @@ -4,6 +4,7 @@ #include <linux/completion.h> #include <linux/kref.h> +#include <scsi/scsi_cmnd.h> /* Descriptor for analyzed sense data */ struct st_cmdstatus { @@ -17,6 +18,17 @@ struct st_cmdstatus { u8 deferred; }; +struct scsi_tape; + +/* scsi tape command */ +struct st_request { + unsigned char cmd[MAX_COMMAND_SIZE]; + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + int result; + struct scsi_tape *stp; + struct completion *waiting; +}; + /* The tape buffer descriptor. */ struct st_buffer { unsigned char in_use; @@ -28,7 +40,7 @@ struct st_buffer { int read_pointer; int writing; int syscall_result; - struct scsi_request *last_SRpnt; + struct st_request *last_SRpnt; struct st_cmdstatus cmdstat; unsigned char *b_data; unsigned short use_sg; /* zero or max number of s/g segments for this adapter */ |