| /* |
| * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003 |
| * |
| * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> |
| * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
| * Copyright (C) 2001-2002 Klaus Smolin |
| * IBM Storage Technology Division |
| * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz |
| * |
| * The big the bad and the ugly. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/timer.h> |
| #include <linux/mm.h> |
| #include <linux/sched.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/blkpg.h> |
| #include <linux/slab.h> |
| #include <linux/pci.h> |
| #include <linux/delay.h> |
| #include <linux/hdreg.h> |
| #include <linux/ide.h> |
| #include <linux/bitops.h> |
| #include <linux/scatterlist.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/irq.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| |
| static void ata_bswap_data (void *buffer, int wcount) |
| { |
| u16 *p = buffer; |
| |
| while (wcount--) { |
| *p = *p << 8 | *p >> 8; p++; |
| *p = *p << 8 | *p >> 8; p++; |
| } |
| } |
| |
| static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) |
| { |
| HWIF(drive)->ata_input_data(drive, buffer, wcount); |
| if (drive->bswap) |
| ata_bswap_data(buffer, wcount); |
| } |
| |
| static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) |
| { |
| if (drive->bswap) { |
| ata_bswap_data(buffer, wcount); |
| HWIF(drive)->ata_output_data(drive, buffer, wcount); |
| ata_bswap_data(buffer, wcount); |
| } else { |
| HWIF(drive)->ata_output_data(drive, buffer, wcount); |
| } |
| } |
| |
| int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) |
| { |
| ide_task_t args; |
| memset(&args, 0, sizeof(ide_task_t)); |
| args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; |
| if (drive->media == ide_disk) |
| args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; |
| else |
| args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; |
| args.command_type = IDE_DRIVE_TASK_IN; |
| args.data_phase = TASKFILE_IN; |
| args.handler = &task_in_intr; |
| return ide_raw_taskfile(drive, &args, buf); |
| } |
| |
| ide_startstop_t do_rw_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; |
| u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; |
| |
| /* 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 (drive->addressing == 1) { |
| hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); |
| hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); |
| hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); |
| hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); |
| hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); |
| } |
| |
| hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); |
| hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); |
| hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); |
| hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); |
| hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); |
| |
| hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); |
| |
| if (task->handler != NULL) { |
| if (task->prehandler != NULL) { |
| 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; |
| } |
| |
| if (!drive->using_dma) |
| return ide_stopped; |
| |
| switch (taskfile->command) { |
| case WIN_WRITEDMA_ONCE: |
| case WIN_WRITEDMA: |
| case WIN_WRITEDMA_EXT: |
| case WIN_READDMA_ONCE: |
| case WIN_READDMA: |
| case WIN_READDMA_EXT: |
| case WIN_IDENTIFY_DMA: |
| if (!hwif->dma_setup(drive)) { |
| hwif->dma_exec_cmd(drive, taskfile->command); |
| hwif->dma_start(drive); |
| return ide_started; |
| } |
| break; |
| default: |
| if (task->handler == NULL) |
| return ide_stopped; |
| } |
| |
| return ide_stopped; |
| } |
| |
| /* |
| * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. |
| */ |
| ide_startstop_t set_multmode_intr (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| u8 stat; |
| |
| if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
| drive->mult_count = drive->mult_req; |
| } else { |
| drive->mult_req = drive->mult_count = 0; |
| drive->special.b.recalibrate = 1; |
| (void) ide_dump_status(drive, "set_multmode", stat); |
| } |
| return ide_stopped; |
| } |
| |
| /* |
| * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. |
| */ |
| ide_startstop_t set_geometry_intr (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| int retries = 5; |
| u8 stat; |
| |
| while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) |
| udelay(10); |
| |
| if (OK_STAT(stat, READY_STAT, BAD_STAT)) |
| return ide_stopped; |
| |
| if (stat & (ERR_STAT|DRQ_STAT)) |
| return ide_error(drive, "set_geometry_intr", stat); |
| |
| BUG_ON(HWGROUP(drive)->handler != NULL); |
| ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); |
| return ide_started; |
| } |
| |
| /* |
| * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. |
| */ |
| ide_startstop_t recal_intr (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| u8 stat; |
| |
| if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) |
| return ide_error(drive, "recal_intr", stat); |
| return ide_stopped; |
| } |
| |
| /* |
| * Handler for commands without a data phase |
| */ |
| ide_startstop_t task_no_data_intr (ide_drive_t *drive) |
| { |
| ide_task_t *args = HWGROUP(drive)->rq->special; |
| ide_hwif_t *hwif = HWIF(drive); |
| u8 stat; |
| |
| local_irq_enable_in_hardirq(); |
| if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
| return ide_error(drive, "task_no_data_intr", stat); |
| /* calls ide_end_drive_cmd */ |
| } |
| if (args) |
| ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); |
| |
| return ide_stopped; |
| } |
| |
| EXPORT_SYMBOL(task_no_data_intr); |
| |
| static u8 wait_drive_not_busy(ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| int retries; |
| u8 stat; |
| |
| /* |
| * Last sector was transfered, wait until drive is ready. |
| * This can take up to 10 usec, but we will wait max 1 ms |
| * (drive_cmd_intr() waits that long). |
| */ |
| for (retries = 0; retries < 100; retries++) { |
| if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) |
| udelay(10); |
| else |
| break; |
| } |
| |
| if (stat & BUSY_STAT) |
| printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); |
| |
| return stat; |
| } |
| |
| static void ide_pio_sector(ide_drive_t *drive, unsigned int write) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct scatterlist *sg = hwif->sg_table; |
| struct scatterlist *cursg = hwif->cursg; |
| struct page *page; |
| #ifdef CONFIG_HIGHMEM |
| unsigned long flags; |
| #endif |
| unsigned int offset; |
| u8 *buf; |
| |
| cursg = hwif->cursg; |
| if (!cursg) { |
| cursg = sg; |
| hwif->cursg = sg; |
| } |
| |
| page = sg_page(cursg); |
| offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; |
| |
| /* get the current page and offset */ |
| page = nth_page(page, (offset >> PAGE_SHIFT)); |
| offset %= PAGE_SIZE; |
| |
| #ifdef CONFIG_HIGHMEM |
| local_irq_save(flags); |
| #endif |
| buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; |
| |
| hwif->nleft--; |
| hwif->cursg_ofs++; |
| |
| if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { |
| hwif->cursg = sg_next(hwif->cursg); |
| hwif->cursg_ofs = 0; |
| } |
| |
| /* do the actual data transfer */ |
| if (write) |
| taskfile_output_data(drive, buf, SECTOR_WORDS); |
| else |
| taskfile_input_data(drive, buf, SECTOR_WORDS); |
| |
| kunmap_atomic(buf, KM_BIO_SRC_IRQ); |
| #ifdef CONFIG_HIGHMEM |
| local_irq_restore(flags); |
| #endif |
| } |
| |
| static void ide_pio_multi(ide_drive_t *drive, unsigned int write) |
| { |
| unsigned int nsect; |
| |
| nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); |
| while (nsect--) |
| ide_pio_sector(drive, write); |
| } |
| |
| static void ide_pio_datablock(ide_drive_t *drive, struct request *rq, |
| unsigned int write) |
| { |
| if (rq->bio) /* fs request */ |
| rq->errors = 0; |
| |
| touch_softlockup_watchdog(); |
| |
| switch (drive->hwif->data_phase) { |
| case TASKFILE_MULTI_IN: |
| case TASKFILE_MULTI_OUT: |
| ide_pio_multi(drive, write); |
| break; |
| default: |
| ide_pio_sector(drive, write); |
| break; |
| } |
| } |
| |
| static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, |
| const char *s, u8 stat) |
| { |
| if (rq->bio) { |
| ide_hwif_t *hwif = drive->hwif; |
| int sectors = hwif->nsect - hwif->nleft; |
| |
| switch (hwif->data_phase) { |
| case TASKFILE_IN: |
| if (hwif->nleft) |
| break; |
| /* fall through */ |
| case TASKFILE_OUT: |
| sectors--; |
| break; |
| case TASKFILE_MULTI_IN: |
| if (hwif->nleft) |
| break; |
| /* fall through */ |
| case TASKFILE_MULTI_OUT: |
| sectors -= drive->mult_count; |
| default: |
| break; |
| } |
| |
| if (sectors > 0) { |
| ide_driver_t *drv; |
| |
| drv = *(ide_driver_t **)rq->rq_disk->private_data; |
| drv->end_request(drive, 1, sectors); |
| } |
| } |
| return ide_error(drive, s, stat); |
| } |
| |
| static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) |
| { |
| HWIF(drive)->cursg = NULL; |
| |
| if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
| ide_task_t *task = rq->special; |
| |
| if (task->tf_out_flags.all) { |
| u8 err = drive->hwif->INB(IDE_ERROR_REG); |
| ide_end_drive_cmd(drive, stat, err); |
| return; |
| } |
| } |
| |
| if (rq->rq_disk) { |
| ide_driver_t *drv; |
| |
| drv = *(ide_driver_t **)rq->rq_disk->private_data;; |
| drv->end_request(drive, 1, rq->hard_nr_sectors); |
| } else |
| ide_end_request(drive, 1, rq->hard_nr_sectors); |
| } |
| |
| /* |
| * Handler for command with PIO data-in phase (Read/Read Multiple). |
| */ |
| ide_startstop_t task_in_intr (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct request *rq = HWGROUP(drive)->rq; |
| u8 stat = hwif->INB(IDE_STATUS_REG); |
| |
| /* new way for dealing with premature shared PCI interrupts */ |
| if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { |
| if (stat & (ERR_STAT | DRQ_STAT)) |
| return task_error(drive, rq, __FUNCTION__, stat); |
| /* No data yet, so wait for another IRQ. */ |
| ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| return ide_started; |
| } |
| |
| ide_pio_datablock(drive, rq, 0); |
| |
| /* If it was the last datablock check status and finish transfer. */ |
| if (!hwif->nleft) { |
| stat = wait_drive_not_busy(drive); |
| if (!OK_STAT(stat, 0, BAD_R_STAT)) |
| return task_error(drive, rq, __FUNCTION__, stat); |
| task_end_request(drive, rq, stat); |
| return ide_stopped; |
| } |
| |
| /* Still data left to transfer. */ |
| ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| |
| return ide_started; |
| } |
| EXPORT_SYMBOL(task_in_intr); |
| |
| /* |
| * Handler for command with PIO data-out phase (Write/Write Multiple). |
| */ |
| static ide_startstop_t task_out_intr (ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct request *rq = HWGROUP(drive)->rq; |
| u8 stat = hwif->INB(IDE_STATUS_REG); |
| |
| if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) |
| return task_error(drive, rq, __FUNCTION__, stat); |
| |
| /* Deal with unexpected ATA data phase. */ |
| if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) |
| return task_error(drive, rq, __FUNCTION__, stat); |
| |
| if (!hwif->nleft) { |
| task_end_request(drive, rq, stat); |
| return ide_stopped; |
| } |
| |
| /* Still data left to transfer. */ |
| ide_pio_datablock(drive, rq, 1); |
| ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| |
| return ide_started; |
| } |
| |
| ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) |
| { |
| ide_startstop_t startstop; |
| |
| if (ide_wait_stat(&startstop, drive, DATA_READY, |
| drive->bad_wstat, WAIT_DRQ)) { |
| printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", |
| drive->name, |
| drive->hwif->data_phase ? "MULT" : "", |
| drive->addressing ? "_EXT" : ""); |
| return startstop; |
| } |
| |
| if (!drive->unmask) |
| local_irq_disable(); |
| |
| ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| ide_pio_datablock(drive, rq, 1); |
| |
| return ide_started; |
| } |
| EXPORT_SYMBOL(pre_task_out_intr); |
| |
| static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) |
| { |
| struct request rq; |
| |
| memset(&rq, 0, sizeof(rq)); |
| rq.ref_count = 1; |
| rq.cmd_type = REQ_TYPE_ATA_TASKFILE; |
| rq.buffer = buf; |
| |
| /* |
| * (ks) We transfer currently only whole sectors. |
| * This is suffient for now. But, it would be great, |
| * if we would find a solution to transfer any size. |
| * To support special commands like READ LONG. |
| */ |
| if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { |
| if (data_size == 0) |
| rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; |
| else |
| rq.nr_sectors = data_size / SECTOR_SIZE; |
| |
| if (!rq.nr_sectors) { |
| printk(KERN_ERR "%s: in/out command without data\n", |
| drive->name); |
| return -EFAULT; |
| } |
| |
| rq.hard_nr_sectors = rq.nr_sectors; |
| rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; |
| |
| if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) |
| rq.cmd_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); |
| unsigned int taskin = 0; |
| unsigned 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 = req_task->out_size; |
| taskin = req_task->in_size; |
| |
| if (taskin > 65536 || taskout > 65536) { |
| err = -EINVAL; |
| goto abort; |
| } |
| |
| 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); |
| } |
| |
| 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.cmd_type = REQ_TYPE_ATA_TASK; |
| rq.buffer = buf; |
| return ide_do_drive_cmd(drive, &rq, ide_wait); |
| } |
| |
| 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: |
| if (!drive->using_dma) |
| break; |
| |
| if (!hwif->dma_setup(drive)) { |
| hwif->dma_exec_cmd(drive, taskfile->command); |
| hwif->dma_start(drive); |
| return ide_started; |
| } |
| 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; |
| } |
| |
| return ide_stopped; |
| } |