/* * 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. * * Problems to be fixed because of BH interface or the lack therefore. * * Fill me in stupid !!! * * HOST: * General refers to the Controller and Driver "pair". * DATA HANDLER: * Under the context of Linux it generally refers to an interrupt handler. * However, it correctly describes the 'HOST' * DATA BLOCK: * The amount of data needed to be transfered as predefined in the * setup of the device. * STORAGE ATOMIC: * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as * small as a single sector or as large as the entire command block * request. */ #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 <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 = 100; 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). */ while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) udelay(10); if (!retries) 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 page *page;#ifdef CONFIG_HIGHMEM unsigned long flags;#endif unsigned int offset; u8 *buf; page = sg[hwif->cursg].page; offset = sg[hwif->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) == sg[hwif->cursg].length) { 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){ 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.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; Lines 1–500 of 868. Load more
/* * 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. * * Problems to be fixed because of BH interface or the lack therefore. * * Fill me in stupid !!! * * HOST: * General refers to the Controller and Driver "pair". * DATA HANDLER: * Under the context of Linux it generally refers to an interrupt handler. * However, it correctly describes the 'HOST' * DATA BLOCK: * The amount of data needed to be transfered as predefined in the * setup of the device. * STORAGE ATOMIC: * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as * small as a single sector or as large as the entire command block * request. */ #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 <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 = 100; 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). */ while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) udelay(10); if (!retries) 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 page *page; #ifdef CONFIG_HIGHMEM unsigned long flags; #endif unsigned int offset; u8 *buf; page = sg[hwif->cursg].page; offset = sg[hwif->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) == sg[hwif->cursg].length) { 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) { 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.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;