diff options
Diffstat (limited to 'drivers/scsi/osst.c')
| -rw-r--r-- | drivers/scsi/osst.c | 96 |
1 files changed, 83 insertions, 13 deletions
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c index 0ea78d9a37d..acb835837ee 100644 --- a/drivers/scsi/osst.c +++ b/drivers/scsi/osst.c @@ -280,8 +280,8 @@ static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) static int notyetprinted = 1; printk(KERN_WARNING - "%s:W: Warning %x (sugg. bt 0x%x, driver bt 0x%x, host bt 0x%x).\n", - name, result, suggestion(result), driver_byte(result) & DRIVER_MASK, + "%s:W: Warning %x (driver bt 0x%x, host bt 0x%x).\n", + name, result, driver_byte(result), host_byte(result)); if (notyetprinted) { notyetprinted = 0; @@ -317,18 +317,25 @@ static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) /* Wakeup from interrupt */ -static void osst_sleep_done(void *data, char *sense, int result, int resid) +static void osst_end_async(struct request *req, int update) { - struct osst_request *SRpnt = data; + struct osst_request *SRpnt = req->end_io_data; struct osst_tape *STp = SRpnt->stp; + struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; - memcpy(SRpnt->sense, sense, SCSI_SENSE_BUFFERSIZE); - STp->buffer->cmdstat.midlevel_result = SRpnt->result = result; + STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors; #if DEBUG STp->write_pending = 0; #endif if (SRpnt->waiting) complete(SRpnt->waiting); + + if (SRpnt->bio) { + kfree(mdata->pages); + blk_rq_unmap_user(SRpnt->bio); + } + + __blk_put_request(req->q, req); } /* osst_request memory management */ @@ -342,6 +349,74 @@ static void osst_release_request(struct osst_request *streq) kfree(streq); } +static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd, + int cmd_len, int data_direction, void *buffer, unsigned bufflen, + int use_sg, int timeout, int retries) +{ + struct request *req; + struct page **pages = NULL; + struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; + + int err = 0; + int write = (data_direction == DMA_TO_DEVICE); + + req = blk_get_request(SRpnt->stp->device->request_queue, write, GFP_KERNEL); + if (!req) + return DRIVER_ERROR << 24; + + req->cmd_type = REQ_TYPE_BLOCK_PC; + req->cmd_flags |= REQ_QUIET; + + SRpnt->bio = NULL; + + if (use_sg) { + struct scatterlist *sg, *sgl = (struct scatterlist *)buffer; + int i; + + pages = kzalloc(use_sg * sizeof(struct page *), GFP_KERNEL); + if (!pages) + goto free_req; + + for_each_sg(sgl, sg, use_sg, i) + pages[i] = sg_page(sg); + + mdata->null_mapped = 1; + + mdata->page_order = get_order(sgl[0].length); + mdata->nr_entries = + DIV_ROUND_UP(bufflen, PAGE_SIZE << mdata->page_order); + mdata->offset = 0; + + err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen, GFP_KERNEL); + if (err) { + kfree(pages); + goto free_req; + } + SRpnt->bio = req->bio; + mdata->pages = pages; + + } else if (bufflen) { + err = blk_rq_map_kern(req->q, req, buffer, bufflen, GFP_KERNEL); + if (err) + goto free_req; + } + + req->cmd_len = cmd_len; + memset(req->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ + memcpy(req->cmd, cmd, req->cmd_len); + req->sense = SRpnt->sense; + req->sense_len = 0; + req->timeout = timeout; + req->retries = retries; + req->end_io_data = SRpnt; + + blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async); + return 0; +free_req: + blk_put_request(req); + return DRIVER_ERROR << 24; +} + /* Do the scsi command. Waits until command performed if do_wait is true. Otherwise osst_write_behind_check() is used to check that the command has finished. */ @@ -403,8 +478,8 @@ static struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct oss STp->buffer->cmdstat.have_sense = 0; STp->buffer->syscall_result = 0; - if (scsi_execute_async(STp->device, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, - use_sg, timeout, retries, SRpnt, osst_sleep_done, GFP_KERNEL)) + if (osst_execute(SRpnt, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, + use_sg, timeout, retries)) /* could not allocate the buffer or request was too large */ (STp->buffer)->syscall_result = (-EBUSY); else if (do_wait) { @@ -5286,11 +5361,6 @@ static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma) struct page *page = alloc_pages(priority, (OS_FRAME_SIZE - got <= PAGE_SIZE) ? 0 : order); STbuffer->sg[segs].offset = 0; if (page == NULL) { - if (OS_FRAME_SIZE - got <= (max_segs - segs) * b_size / 2 && order) { - b_size /= 2; /* Large enough for the rest of the buffers */ - order--; - continue; - } printk(KERN_WARNING "osst :W: Failed to enlarge buffer to %d bytes.\n", OS_FRAME_SIZE); #if DEBUG |