Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
new file mode 100644
index 0000000..d04f62a
--- /dev/null
+++ b/drivers/ide/ide-taskfile.c
@@ -0,0 +1,884 @@
+/*
+ * 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/config.h>
+#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/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>
+
+#define DEBUG_TASKFILE 0 /* unset when fixed */
+
+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;
+}
+
+EXPORT_SYMBOL(do_rw_taskfile);
+
+/*
+ * 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);
+
+ if (HWGROUP(drive)->handler != NULL)
+ BUG();
+ 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();
+ 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 inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
+ unsigned int write)
+{
+ if (rq->bio) /* fs request */
+ rq->errors = 0;
+
+ 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->flags & REQ_DRIVE_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;
+ }
+ }
+
+ 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.flags = REQ_DRIVE_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.flags |= REQ_RW;
+ }
+
+ rq.special = args;
+ 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 = kmalloc(tasksize, GFP_KERNEL);
+ if (req_task == NULL) return -ENOMEM;
+ memset(req_task, 0, tasksize);
+ 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 = kmalloc(taskout, GFP_KERNEL);
+ if (outbuf == NULL) {
+ err = -ENOMEM;
+ goto abort;
+ }
+ memset(outbuf, 0, taskout);
+ if (copy_from_user(outbuf, buf + outtotal, taskout)) {
+ err = -EFAULT;
+ goto abort;
+ }
+ }
+
+ if (taskin) {
+ int intotal = tasksize + taskout;
+ inbuf = kmalloc(taskin, GFP_KERNEL);
+ if (inbuf == NULL) {
+ err = -ENOMEM;
+ goto abort;
+ }
+ memset(inbuf, 0, taskin);
+ 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);
+ if (outbuf != NULL)
+ kfree(outbuf);
+ if (inbuf != NULL)
+ 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 = kmalloc(argsize, GFP_KERNEL);
+ if (argbuf == NULL)
+ return -ENOMEM;
+ memcpy(argbuf, args, 4);
+ }
+ 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 DEBUG_TASKFILE
+ u8 status;
+#endif
+
+ 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/out flags.
+ * If set, then execute as it is defined.
+ * If not set, then define default settings.
+ * The default values are:
+ * write and read all taskfile registers (except data)
+ * write and read the hob registers (sector,nsector,lcyl,hcyl)
+ */
+ if (task->tf_out_flags.all == 0) {
+ task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS;
+ if (drive->addressing == 1)
+ task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8);
+ }
+
+ 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 DEBUG_TASKFILE
+ status = hwif->INB(IDE_STATUS_REG);
+ if (status & 0x80) {
+ printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status);
+ udelay(100);
+ status = hwif->INB(IDE_STATUS_REG);
+ printk("flagged_taskfile -> Status = %02x\n", status);
+ }
+#endif
+
+ 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;
+}