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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 07:50:51 +07:00
ide-floppy: use ide_pio_bytes()
* Fix ide_init_sg_cmd() setup for non-fs requests. * Convert ide_pc_intr() to use ide_pio_bytes() for floppy media. * Remove no longer needed ide_io_buffers() and sg/sg_cnt fields from struct ide_atapi_pc. * Remove partial completions; kill idefloppy_update_buffers(), as a result. * Add some more debugging statements. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
parent
d93bc4521c
commit
349d12a1fe
@ -71,49 +71,6 @@ int ide_check_atapi_device(ide_drive_t *drive, const char *s)
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}
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EXPORT_SYMBOL_GPL(ide_check_atapi_device);
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/* PIO data transfer routine using the scatter gather table. */
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int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
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unsigned int bcount, int write)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_tp_ops *tp_ops = hwif->tp_ops;
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xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data;
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struct scatterlist *sg = pc->sg;
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char *buf;
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int count, done = 0;
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while (bcount) {
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count = min(sg->length - pc->b_count, bcount);
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if (PageHighMem(sg_page(sg))) {
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unsigned long flags;
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local_irq_save(flags);
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buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
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xf(drive, NULL, buf + pc->b_count, count);
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kunmap_atomic(buf - sg->offset, KM_IRQ0);
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local_irq_restore(flags);
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} else {
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buf = sg_virt(sg);
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xf(drive, NULL, buf + pc->b_count, count);
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}
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bcount -= count;
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pc->b_count += count;
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done += count;
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if (pc->b_count == sg->length) {
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if (!--pc->sg_cnt)
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break;
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pc->sg = sg = sg_next(sg);
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pc->b_count = 0;
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}
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}
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return done;
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}
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EXPORT_SYMBOL_GPL(ide_io_buffers);
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void ide_init_pc(struct ide_atapi_pc *pc)
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{
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memset(pc, 0, sizeof(*pc));
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@ -353,6 +310,9 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
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pc->xferred = pc->req_xfer;
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if (drive->pc_update_buffers)
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drive->pc_update_buffers(drive, pc);
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if (drive->media == ide_floppy)
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ide_complete_rq(drive, 0, blk_rq_bytes(rq));
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}
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debug_log("%s: DMA finished\n", drive->name);
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}
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@ -408,12 +368,19 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
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rq->errors = 0;
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ide_complete_rq(drive, 0, blk_rq_bytes(rq));
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} else {
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unsigned int done;
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if (blk_fs_request(rq) == 0 && uptodate <= 0) {
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if (rq->errors == 0)
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rq->errors = -EIO;
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}
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ide_complete_rq(drive, uptodate ? 0 : -EIO,
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ide_rq_bytes(rq));
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if (drive->media == ide_tape)
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done = ide_rq_bytes(rq); /* FIXME */
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else
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done = blk_rq_bytes(rq);
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ide_complete_rq(drive, uptodate ? 0 : -EIO, done);
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}
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return ide_stopped;
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@ -446,14 +413,11 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
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xferfunc = write ? tp_ops->output_data : tp_ops->input_data;
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if ((drive->media == ide_floppy && !pc->buf) ||
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(drive->media == ide_tape && pc->bh)) {
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if (drive->media == ide_floppy && pc->buf == NULL) {
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done = min_t(unsigned int, bcount, cmd->nleft);
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ide_pio_bytes(drive, cmd, write, done);
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} else if (drive->media == ide_tape && pc->bh) {
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done = drive->pc_io_buffers(drive, pc, bcount, write);
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/* FIXME: don't do partial completions */
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if (drive->media == ide_floppy)
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ide_complete_rq(drive, 0,
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done ? done : ide_rq_bytes(rq));
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} else {
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done = min_t(unsigned int, bcount, pc->req_xfer - pc->xferred);
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xferfunc(drive, NULL, pc->cur_pos, done);
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@ -61,16 +61,6 @@
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*/
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#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
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static void idefloppy_update_buffers(ide_drive_t *drive,
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struct ide_atapi_pc *pc)
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{
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struct request *rq = pc->rq;
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struct bio *bio = rq->bio;
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while ((bio = rq->bio) != NULL)
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ide_complete_rq(drive, 0, ide_rq_bytes(rq));
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}
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static int ide_floppy_callback(ide_drive_t *drive, int dsc)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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@ -213,7 +203,6 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
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memcpy(rq->cmd, pc->c, 12);
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pc->rq = rq;
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pc->b_count = 0;
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if (rq->cmd_flags & REQ_RW)
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pc->flags |= PC_FLAG_WRITING;
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pc->buf = NULL;
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@ -227,7 +216,6 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
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ide_init_pc(pc);
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memcpy(pc->c, rq->cmd, sizeof(pc->c));
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pc->rq = rq;
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pc->b_count = 0;
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if (rq->data_len && rq_data_dir(rq) == WRITE)
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pc->flags |= PC_FLAG_WRITING;
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pc->buf = rq->data;
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@ -244,10 +232,11 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
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struct request *rq, sector_t block)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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ide_hwif_t *hwif = drive->hwif;
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struct ide_cmd cmd;
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struct ide_atapi_pc *pc;
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ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
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if (drive->debug_mask & IDE_DBG_RQ)
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blk_dump_rq_flags(rq, (rq->rq_disk
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? rq->rq_disk->disk_name
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@ -294,13 +283,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
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cmd.rq = rq;
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if (blk_fs_request(rq) || pc->req_xfer) {
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ide_init_sg_cmd(&cmd, rq->nr_sectors << 9);
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ide_init_sg_cmd(&cmd, pc->req_xfer);
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ide_map_sg(drive, &cmd);
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}
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pc->sg = hwif->sg_table;
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pc->sg_cnt = cmd.sg_nents;
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pc->rq = rq;
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return ide_floppy_issue_pc(drive, &cmd, pc);
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@ -388,6 +374,8 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
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u8 pc_buf[256], header_len, desc_cnt;
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int i, rc = 1, blocks, length;
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ide_debug_log(IDE_DBG_FUNC, "enter");
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drive->bios_cyl = 0;
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drive->bios_head = drive->bios_sect = 0;
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floppy->blocks = 0;
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@ -488,8 +476,6 @@ static void ide_floppy_setup(ide_drive_t *drive)
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u16 *id = drive->id;
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drive->pc_callback = ide_floppy_callback;
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drive->pc_update_buffers = idefloppy_update_buffers;
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drive->pc_io_buffers = ide_io_buffers;
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/*
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* We used to check revisions here. At this point however I'm giving up.
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@ -415,9 +415,6 @@ struct ide_atapi_pc {
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struct idetape_bh *bh;
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char *b_data;
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struct scatterlist *sg;
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unsigned int sg_cnt;
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unsigned long timeout;
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};
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@ -1177,8 +1174,6 @@ void ide_tf_read(ide_drive_t *, struct ide_cmd *);
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void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
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void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
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int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
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extern void SELECT_DRIVE(ide_drive_t *);
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void SELECT_MASK(ide_drive_t *, int);
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