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![Bartlomiej Zolnierkiewicz](/assets/img/avatar_default.png)
flagged_taskfile() is called from execute_drive_cmd() (the only user) only if args->tf_out_flags.all != 0. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
856 lines
22 KiB
C
856 lines
22 KiB
C
/*
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* linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003
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*
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* Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
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* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2001-2002 Klaus Smolin
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* IBM Storage Technology Division
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* Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz
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*
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* The big the bad and the ugly.
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*
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* Problems to be fixed because of BH interface or the lack therefore.
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*
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* Fill me in stupid !!!
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*
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* HOST:
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* General refers to the Controller and Driver "pair".
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* DATA HANDLER:
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* Under the context of Linux it generally refers to an interrupt handler.
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* However, it correctly describes the 'HOST'
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* DATA BLOCK:
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* The amount of data needed to be transfered as predefined in the
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* setup of the device.
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* STORAGE ATOMIC:
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* The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
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* small as a single sector or as large as the entire command block
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* request.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/blkpg.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <linux/bitops.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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static void ata_bswap_data (void *buffer, int wcount)
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{
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u16 *p = buffer;
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while (wcount--) {
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*p = *p << 8 | *p >> 8; p++;
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*p = *p << 8 | *p >> 8; p++;
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}
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}
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static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
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{
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HWIF(drive)->ata_input_data(drive, buffer, wcount);
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if (drive->bswap)
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ata_bswap_data(buffer, wcount);
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}
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static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
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{
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if (drive->bswap) {
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ata_bswap_data(buffer, wcount);
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HWIF(drive)->ata_output_data(drive, buffer, wcount);
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ata_bswap_data(buffer, wcount);
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} else {
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HWIF(drive)->ata_output_data(drive, buffer, wcount);
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}
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}
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int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
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{
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ide_task_t args;
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memset(&args, 0, sizeof(ide_task_t));
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args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
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if (drive->media == ide_disk)
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args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
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else
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args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
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args.command_type = IDE_DRIVE_TASK_IN;
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args.data_phase = TASKFILE_IN;
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args.handler = &task_in_intr;
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return ide_raw_taskfile(drive, &args, buf);
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}
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ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
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{
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ide_hwif_t *hwif = HWIF(drive);
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task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
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hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
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u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
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/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
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if (IDE_CONTROL_REG) {
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/* clear nIEN */
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hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
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}
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SELECT_MASK(drive, 0);
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if (drive->addressing == 1) {
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hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
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hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
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hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
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hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
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hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
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}
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hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
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hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
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hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
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hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
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hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
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hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
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if (task->handler != NULL) {
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if (task->prehandler != NULL) {
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hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
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ndelay(400); /* FIXME */
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return task->prehandler(drive, task->rq);
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}
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ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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if (!drive->using_dma)
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return ide_stopped;
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switch (taskfile->command) {
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case WIN_WRITEDMA_ONCE:
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case WIN_WRITEDMA:
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case WIN_WRITEDMA_EXT:
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case WIN_READDMA_ONCE:
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case WIN_READDMA:
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case WIN_READDMA_EXT:
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case WIN_IDENTIFY_DMA:
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if (!hwif->dma_setup(drive)) {
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hwif->dma_exec_cmd(drive, taskfile->command);
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hwif->dma_start(drive);
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return ide_started;
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}
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break;
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default:
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if (task->handler == NULL)
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return ide_stopped;
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}
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return ide_stopped;
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}
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/*
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* set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
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*/
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ide_startstop_t set_multmode_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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u8 stat;
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if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
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drive->mult_count = drive->mult_req;
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} else {
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drive->mult_req = drive->mult_count = 0;
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drive->special.b.recalibrate = 1;
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(void) ide_dump_status(drive, "set_multmode", stat);
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}
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return ide_stopped;
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}
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/*
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* set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
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*/
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ide_startstop_t set_geometry_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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int retries = 5;
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u8 stat;
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while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
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udelay(10);
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if (OK_STAT(stat, READY_STAT, BAD_STAT))
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return ide_stopped;
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if (stat & (ERR_STAT|DRQ_STAT))
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return ide_error(drive, "set_geometry_intr", stat);
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if (HWGROUP(drive)->handler != NULL)
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BUG();
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ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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/*
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* recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
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*/
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ide_startstop_t recal_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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u8 stat;
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if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
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return ide_error(drive, "recal_intr", stat);
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return ide_stopped;
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}
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/*
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* Handler for commands without a data phase
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*/
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ide_startstop_t task_no_data_intr (ide_drive_t *drive)
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{
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ide_task_t *args = HWGROUP(drive)->rq->special;
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ide_hwif_t *hwif = HWIF(drive);
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u8 stat;
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local_irq_enable();
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if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
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return ide_error(drive, "task_no_data_intr", stat);
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/* calls ide_end_drive_cmd */
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}
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if (args)
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ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
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return ide_stopped;
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}
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EXPORT_SYMBOL(task_no_data_intr);
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static u8 wait_drive_not_busy(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = HWIF(drive);
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int retries = 100;
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u8 stat;
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/*
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* Last sector was transfered, wait until drive is ready.
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* This can take up to 10 usec, but we will wait max 1 ms
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* (drive_cmd_intr() waits that long).
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*/
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while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
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udelay(10);
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if (!retries)
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printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
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return stat;
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}
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static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct scatterlist *sg = hwif->sg_table;
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struct page *page;
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#ifdef CONFIG_HIGHMEM
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unsigned long flags;
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#endif
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unsigned int offset;
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u8 *buf;
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page = sg[hwif->cursg].page;
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offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
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/* get the current page and offset */
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page = nth_page(page, (offset >> PAGE_SHIFT));
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offset %= PAGE_SIZE;
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#ifdef CONFIG_HIGHMEM
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local_irq_save(flags);
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#endif
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buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
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hwif->nleft--;
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hwif->cursg_ofs++;
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if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
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hwif->cursg++;
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hwif->cursg_ofs = 0;
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}
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/* do the actual data transfer */
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if (write)
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taskfile_output_data(drive, buf, SECTOR_WORDS);
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else
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taskfile_input_data(drive, buf, SECTOR_WORDS);
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kunmap_atomic(buf, KM_BIO_SRC_IRQ);
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#ifdef CONFIG_HIGHMEM
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local_irq_restore(flags);
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#endif
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}
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static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
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{
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unsigned int nsect;
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nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
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while (nsect--)
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ide_pio_sector(drive, write);
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}
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static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
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unsigned int write)
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{
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if (rq->bio) /* fs request */
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rq->errors = 0;
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switch (drive->hwif->data_phase) {
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case TASKFILE_MULTI_IN:
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case TASKFILE_MULTI_OUT:
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ide_pio_multi(drive, write);
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break;
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default:
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ide_pio_sector(drive, write);
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break;
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}
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}
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static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
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const char *s, u8 stat)
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{
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if (rq->bio) {
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ide_hwif_t *hwif = drive->hwif;
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int sectors = hwif->nsect - hwif->nleft;
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switch (hwif->data_phase) {
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case TASKFILE_IN:
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if (hwif->nleft)
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break;
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/* fall through */
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case TASKFILE_OUT:
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sectors--;
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break;
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case TASKFILE_MULTI_IN:
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if (hwif->nleft)
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break;
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/* fall through */
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case TASKFILE_MULTI_OUT:
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sectors -= drive->mult_count;
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default:
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break;
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}
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if (sectors > 0) {
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ide_driver_t *drv;
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drv = *(ide_driver_t **)rq->rq_disk->private_data;
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drv->end_request(drive, 1, sectors);
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}
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}
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return ide_error(drive, s, stat);
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}
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static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
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{
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if (rq->flags & REQ_DRIVE_TASKFILE) {
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ide_task_t *task = rq->special;
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if (task->tf_out_flags.all) {
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u8 err = drive->hwif->INB(IDE_ERROR_REG);
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ide_end_drive_cmd(drive, stat, err);
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return;
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}
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}
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ide_end_request(drive, 1, rq->hard_nr_sectors);
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}
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/*
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* Handler for command with PIO data-in phase (Read/Read Multiple).
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*/
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ide_startstop_t task_in_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct request *rq = HWGROUP(drive)->rq;
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u8 stat = hwif->INB(IDE_STATUS_REG);
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/* new way for dealing with premature shared PCI interrupts */
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if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
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if (stat & (ERR_STAT | DRQ_STAT))
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return task_error(drive, rq, __FUNCTION__, stat);
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/* No data yet, so wait for another IRQ. */
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ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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ide_pio_datablock(drive, rq, 0);
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/* If it was the last datablock check status and finish transfer. */
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if (!hwif->nleft) {
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stat = wait_drive_not_busy(drive);
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if (!OK_STAT(stat, 0, BAD_R_STAT))
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return task_error(drive, rq, __FUNCTION__, stat);
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task_end_request(drive, rq, stat);
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return ide_stopped;
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}
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/* Still data left to transfer. */
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ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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EXPORT_SYMBOL(task_in_intr);
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/*
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* Handler for command with PIO data-out phase (Write/Write Multiple).
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*/
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static ide_startstop_t task_out_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct request *rq = HWGROUP(drive)->rq;
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u8 stat = hwif->INB(IDE_STATUS_REG);
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if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
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return task_error(drive, rq, __FUNCTION__, stat);
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/* Deal with unexpected ATA data phase. */
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if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
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return task_error(drive, rq, __FUNCTION__, stat);
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if (!hwif->nleft) {
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task_end_request(drive, rq, stat);
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return ide_stopped;
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}
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/* Still data left to transfer. */
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ide_pio_datablock(drive, rq, 1);
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ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
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{
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ide_startstop_t startstop;
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if (ide_wait_stat(&startstop, drive, DATA_READY,
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drive->bad_wstat, WAIT_DRQ)) {
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printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
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drive->name,
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drive->hwif->data_phase ? "MULT" : "",
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drive->addressing ? "_EXT" : "");
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return startstop;
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}
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if (!drive->unmask)
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local_irq_disable();
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ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
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ide_pio_datablock(drive, rq, 1);
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return ide_started;
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}
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EXPORT_SYMBOL(pre_task_out_intr);
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static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
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{
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struct request rq;
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memset(&rq, 0, sizeof(rq));
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rq.flags = REQ_DRIVE_TASKFILE;
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rq.buffer = buf;
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/*
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* (ks) We transfer currently only whole sectors.
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* This is suffient for now. But, it would be great,
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* if we would find a solution to transfer any size.
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* To support special commands like READ LONG.
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*/
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if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
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if (data_size == 0)
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rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
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else
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rq.nr_sectors = data_size / SECTOR_SIZE;
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if (!rq.nr_sectors) {
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printk(KERN_ERR "%s: in/out command without data\n",
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drive->name);
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return -EFAULT;
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}
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rq.hard_nr_sectors = rq.nr_sectors;
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rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
|
|
|
|
if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
|
|
rq.flags |= REQ_RW;
|
|
}
|
|
|
|
rq.special = args;
|
|
args->rq = &rq;
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
|
}
|
|
|
|
int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
|
|
{
|
|
return ide_diag_taskfile(drive, args, 0, buf);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_raw_taskfile);
|
|
|
|
int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
|
|
{
|
|
ide_task_request_t *req_task;
|
|
ide_task_t args;
|
|
u8 *outbuf = NULL;
|
|
u8 *inbuf = NULL;
|
|
task_ioreg_t *argsptr = args.tfRegister;
|
|
task_ioreg_t *hobsptr = args.hobRegister;
|
|
int err = 0;
|
|
int tasksize = sizeof(struct ide_task_request_s);
|
|
int taskin = 0;
|
|
int taskout = 0;
|
|
u8 io_32bit = drive->io_32bit;
|
|
char __user *buf = (char __user *)arg;
|
|
|
|
// printk("IDE Taskfile ...\n");
|
|
|
|
req_task = kzalloc(tasksize, GFP_KERNEL);
|
|
if (req_task == NULL) return -ENOMEM;
|
|
if (copy_from_user(req_task, buf, tasksize)) {
|
|
kfree(req_task);
|
|
return -EFAULT;
|
|
}
|
|
|
|
taskout = (int) req_task->out_size;
|
|
taskin = (int) req_task->in_size;
|
|
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
outbuf = kzalloc(taskout, GFP_KERNEL);
|
|
if (outbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(outbuf, buf + outtotal, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
inbuf = kzalloc(taskin, GFP_KERNEL);
|
|
if (inbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(inbuf, buf + intotal, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
|
|
memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
|
|
|
|
args.tf_in_flags = req_task->in_flags;
|
|
args.tf_out_flags = req_task->out_flags;
|
|
args.data_phase = req_task->data_phase;
|
|
args.command_type = req_task->req_cmd;
|
|
|
|
drive->io_32bit = 0;
|
|
switch(req_task->data_phase) {
|
|
case TASKFILE_OUT_DMAQ:
|
|
case TASKFILE_OUT_DMA:
|
|
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
|
|
break;
|
|
case TASKFILE_IN_DMAQ:
|
|
case TASKFILE_IN_DMA:
|
|
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
|
|
break;
|
|
case TASKFILE_MULTI_OUT:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
printk(KERN_ERR "%s: %s Multimode Write " \
|
|
"multcount is not set\n",
|
|
drive->name, __FUNCTION__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
/* fall through */
|
|
case TASKFILE_OUT:
|
|
args.prehandler = &pre_task_out_intr;
|
|
args.handler = &task_out_intr;
|
|
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
|
|
break;
|
|
case TASKFILE_MULTI_IN:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
printk(KERN_ERR "%s: %s Multimode Read failure " \
|
|
"multcount is not set\n",
|
|
drive->name, __FUNCTION__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
/* fall through */
|
|
case TASKFILE_IN:
|
|
args.handler = &task_in_intr;
|
|
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
|
|
break;
|
|
case TASKFILE_NO_DATA:
|
|
args.handler = &task_no_data_intr;
|
|
err = ide_diag_taskfile(drive, &args, 0, NULL);
|
|
break;
|
|
default:
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
|
|
memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
|
|
memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
|
|
req_task->in_flags = args.tf_in_flags;
|
|
req_task->out_flags = args.tf_out_flags;
|
|
|
|
if (copy_to_user(buf, req_task, tasksize)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
if (copy_to_user(buf + intotal, inbuf, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
abort:
|
|
kfree(req_task);
|
|
kfree(outbuf);
|
|
kfree(inbuf);
|
|
|
|
// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
|
|
|
|
drive->io_32bit = io_32bit;
|
|
|
|
return err;
|
|
}
|
|
|
|
int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
|
|
{
|
|
struct request rq;
|
|
u8 buffer[4];
|
|
|
|
if (!buf)
|
|
buf = buffer;
|
|
memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
|
|
ide_init_drive_cmd(&rq);
|
|
rq.buffer = buf;
|
|
*buf++ = cmd;
|
|
*buf++ = nsect;
|
|
*buf++ = feature;
|
|
*buf++ = sectors;
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
|
}
|
|
|
|
/*
|
|
* FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
|
|
*/
|
|
int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int err = 0;
|
|
u8 args[4], *argbuf = args;
|
|
u8 xfer_rate = 0;
|
|
int argsize = 4;
|
|
ide_task_t tfargs;
|
|
|
|
if (NULL == (void *) arg) {
|
|
struct request rq;
|
|
ide_init_drive_cmd(&rq);
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
|
}
|
|
|
|
if (copy_from_user(args, (void __user *)arg, 4))
|
|
return -EFAULT;
|
|
|
|
memset(&tfargs, 0, sizeof(ide_task_t));
|
|
tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
|
|
tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
|
|
tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
|
|
tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
|
|
tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
|
|
tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
|
|
tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
|
|
|
|
if (args[3]) {
|
|
argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
|
|
argbuf = kzalloc(argsize, GFP_KERNEL);
|
|
if (argbuf == NULL)
|
|
return -ENOMEM;
|
|
}
|
|
if (set_transfer(drive, &tfargs)) {
|
|
xfer_rate = args[1];
|
|
if (ide_ata66_check(drive, &tfargs))
|
|
goto abort;
|
|
}
|
|
|
|
err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
|
|
|
|
if (!err && xfer_rate) {
|
|
/* active-retuning-calls future */
|
|
ide_set_xfer_rate(drive, xfer_rate);
|
|
ide_driveid_update(drive);
|
|
}
|
|
abort:
|
|
if (copy_to_user((void __user *)arg, argbuf, argsize))
|
|
err = -EFAULT;
|
|
if (argsize > 4)
|
|
kfree(argbuf);
|
|
return err;
|
|
}
|
|
|
|
static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
|
|
{
|
|
struct request rq;
|
|
|
|
ide_init_drive_cmd(&rq);
|
|
rq.flags = REQ_DRIVE_TASK;
|
|
rq.buffer = buf;
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
|
}
|
|
|
|
/*
|
|
* FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
|
|
*/
|
|
int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *p = (void __user *)arg;
|
|
int err = 0;
|
|
u8 args[7], *argbuf = args;
|
|
int argsize = 7;
|
|
|
|
if (copy_from_user(args, p, 7))
|
|
return -EFAULT;
|
|
err = ide_wait_cmd_task(drive, argbuf);
|
|
if (copy_to_user(p, argbuf, argsize))
|
|
err = -EFAULT;
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* NOTICE: This is additions from IBM to provide a discrete interface,
|
|
* for selective taskregister access operations. Nice JOB Klaus!!!
|
|
* Glad to be able to work and co-develop this with you and IBM.
|
|
*/
|
|
ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
|
|
{
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
|
|
hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
|
|
|
|
if (task->data_phase == TASKFILE_MULTI_IN ||
|
|
task->data_phase == TASKFILE_MULTI_OUT) {
|
|
if (!drive->mult_count) {
|
|
printk(KERN_ERR "%s: multimode not set!\n", drive->name);
|
|
return ide_stopped;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* (ks) Check taskfile in flags.
|
|
* If set, then execute as it is defined.
|
|
* If not set, then define default settings.
|
|
* The default values are:
|
|
* read all taskfile registers (except data)
|
|
* read the hob registers (sector, nsector, lcyl, hcyl)
|
|
*/
|
|
if (task->tf_in_flags.all == 0) {
|
|
task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
|
|
if (drive->addressing == 1)
|
|
task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
|
|
}
|
|
|
|
/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
|
|
if (IDE_CONTROL_REG)
|
|
/* clear nIEN */
|
|
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
|
|
SELECT_MASK(drive, 0);
|
|
|
|
if (task->tf_out_flags.b.data) {
|
|
u16 data = taskfile->data + (hobfile->data << 8);
|
|
hwif->OUTW(data, IDE_DATA_REG);
|
|
}
|
|
|
|
/* (ks) send hob registers first */
|
|
if (task->tf_out_flags.b.nsector_hob)
|
|
hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
|
|
if (task->tf_out_flags.b.sector_hob)
|
|
hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
|
|
if (task->tf_out_flags.b.lcyl_hob)
|
|
hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
|
|
if (task->tf_out_flags.b.hcyl_hob)
|
|
hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
|
|
|
|
/* (ks) Send now the standard registers */
|
|
if (task->tf_out_flags.b.error_feature)
|
|
hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
|
|
/* refers to number of sectors to transfer */
|
|
if (task->tf_out_flags.b.nsector)
|
|
hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
|
|
/* refers to sector offset or start sector */
|
|
if (task->tf_out_flags.b.sector)
|
|
hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
|
|
if (task->tf_out_flags.b.lcyl)
|
|
hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
|
|
if (task->tf_out_flags.b.hcyl)
|
|
hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
|
|
|
|
/*
|
|
* (ks) In the flagged taskfile approch, we will use all specified
|
|
* registers and the register value will not be changed, except the
|
|
* select bit (master/slave) in the drive_head register. We must make
|
|
* sure that the desired drive is selected.
|
|
*/
|
|
hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
|
|
switch(task->data_phase) {
|
|
|
|
case TASKFILE_OUT_DMAQ:
|
|
case TASKFILE_OUT_DMA:
|
|
case TASKFILE_IN_DMAQ:
|
|
case TASKFILE_IN_DMA:
|
|
hwif->dma_setup(drive);
|
|
hwif->dma_exec_cmd(drive, taskfile->command);
|
|
hwif->dma_start(drive);
|
|
break;
|
|
|
|
default:
|
|
if (task->handler == NULL)
|
|
return ide_stopped;
|
|
|
|
/* Issue the command */
|
|
if (task->prehandler) {
|
|
hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
|
|
ndelay(400); /* FIXME */
|
|
return task->prehandler(drive, task->rq);
|
|
}
|
|
ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
|
|
}
|
|
|
|
return ide_started;
|
|
}
|