--- /dev/null
+/*
+ * 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, 2007 Bartlomiej Zolnierkiewicz
+ *
+ * The big the bad and the ugly.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/scatterlist.h>
+#include <linux/uaccess.h>
+
+#include <asm/io.h>
+
+void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+
+ /* Be sure we're looking at the low order bytes */
+ tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+ tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
+
+ if (cmd->tf_flags & IDE_TFLAG_LBA48) {
+ tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
+
+ tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
+ }
+}
+
+void ide_tf_dump(const char *s, struct ide_cmd *cmd)
+{
+#ifdef DEBUG
+ printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
+ "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
+ s, cmd->tf.feature, cmd->tf.nsect,
+ cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
+ cmd->tf.device, cmd->tf.command);
+ printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
+ s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
+#endif
+}
+
+int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
+{
+ struct ide_cmd cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.tf.nsect = 0x01;
+ if (drive->media == ide_disk)
+ cmd.tf.command = ATA_CMD_ID_ATA;
+ else
+ cmd.tf.command = ATA_CMD_ID_ATAPI;
+ cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+ cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
+ cmd.protocol = ATA_PROT_PIO;
+
+ return ide_raw_taskfile(drive, &cmd, buf, 1);
+}
+
+static ide_startstop_t task_no_data_intr(ide_drive_t *);
+static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
+static ide_startstop_t task_pio_intr(ide_drive_t *);
+
+ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
+ struct ide_taskfile *tf = &cmd->tf;
+ ide_handler_t *handler = NULL;
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ const struct ide_dma_ops *dma_ops = hwif->dma_ops;
+
+ if (orig_cmd->protocol == ATA_PROT_PIO &&
+ (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
+ drive->mult_count == 0) {
+ pr_err("%s: multimode not set!\n", drive->name);
+ return ide_stopped;
+ }
+
+ if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
+ orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
+
+ memcpy(cmd, orig_cmd, sizeof(*cmd));
+
+ if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
+ ide_tf_dump(drive->name, cmd);
+ tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+ if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
+ u8 data[2] = { cmd->tf.data, cmd->hob.data };
+
+ tp_ops->output_data(drive, cmd, data, 2);
+ }
+
+ if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
+ u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
+ 0xE0 : 0xEF;
+
+ if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
+ cmd->tf.device &= HIHI;
+ cmd->tf.device |= drive->select;
+ }
+
+ tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
+ tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
+ }
+
+ switch (cmd->protocol) {
+ case ATA_PROT_PIO:
+ if (cmd->tf_flags & IDE_TFLAG_WRITE) {
+ tp_ops->exec_command(hwif, tf->command);
+ ndelay(400); /* FIXME */
+ return pre_task_out_intr(drive, cmd);
+ }
+ handler = task_pio_intr;
+ /* fall-through */
+ case ATA_PROT_NODATA:
+ if (handler == NULL)
+ handler = task_no_data_intr;
+ ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
+ return ide_started;
+ case ATA_PROT_DMA:
+ if (ide_dma_prepare(drive, cmd))
+ return ide_stopped;
+ hwif->expiry = dma_ops->dma_timer_expiry;
+ ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
+ dma_ops->dma_start(drive);
+ default:
+ return ide_started;
+ }
+}
+EXPORT_SYMBOL_GPL(do_rw_taskfile);
+
+static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
+ struct ide_taskfile *tf = &cmd->tf;
+ int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
+ int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
+ u8 stat;
+
+ local_irq_enable_in_hardirq();
+
+ while (1) {
+ stat = hwif->tp_ops->read_status(hwif);
+ if ((stat & ATA_BUSY) == 0 || retries-- == 0)
+ break;
+ udelay(10);
+ };
+
+ if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
+ if (custom && tf->command == ATA_CMD_SET_MULTI) {
+ drive->mult_req = drive->mult_count = 0;
+ drive->special_flags |= IDE_SFLAG_RECALIBRATE;
+ (void)ide_dump_status(drive, __func__, stat);
+ return ide_stopped;
+ } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
+ if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
+ ide_set_handler(drive, &task_no_data_intr,
+ WAIT_WORSTCASE);
+ return ide_started;
+ }
+ }
+ return ide_error(drive, "task_no_data_intr", stat);
+ }
+
+ if (custom && tf->command == ATA_CMD_SET_MULTI)
+ drive->mult_count = drive->mult_req;
+
+ if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
+ tf->command == ATA_CMD_CHK_POWER) {
+ struct request *rq = hwif->rq;
+
+ if (blk_pm_request(rq))
+ ide_complete_pm_rq(drive, rq);
+ else
+ ide_finish_cmd(drive, cmd, stat);
+ }
+
+ return ide_stopped;
+}
+
+static u8 wait_drive_not_busy(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ int retries;
+ u8 stat;
+
+ /*
+ * Last sector was transferred, wait until device is ready. This can
+ * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
+ */
+ for (retries = 0; retries < 1000; retries++) {
+ stat = hwif->tp_ops->read_status(hwif);
+
+ if (stat & ATA_BUSY)
+ udelay(10);
+ else
+ break;
+ }
+
+ if (stat & ATA_BUSY)
+ pr_err("%s: drive still BUSY!\n", drive->name);
+
+ return stat;
+}
+
+void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write, unsigned int len)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct scatterlist *sg = hwif->sg_table;
+ struct scatterlist *cursg = cmd->cursg;
+ unsigned long uninitialized_var(flags);
+ struct page *page;
+ unsigned int offset;
+ u8 *buf;
+
+ cursg = cmd->cursg;
+ if (cursg == NULL)
+ cursg = cmd->cursg = sg;
+
+ while (len) {
+ unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
+ int page_is_high;
+
+ page = sg_page(cursg);
+ offset = cursg->offset + cmd->cursg_ofs;
+
+ /* get the current page and offset */
+ page = nth_page(page, (offset >> PAGE_SHIFT));
+ offset %= PAGE_SIZE;
+
+ nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
+
+ page_is_high = PageHighMem(page);
+ if (page_is_high)
+ local_irq_save_nort(flags);
+
+ buf = kmap_atomic(page) + offset;
+
+ cmd->nleft -= nr_bytes;
+ cmd->cursg_ofs += nr_bytes;
+
+ if (cmd->cursg_ofs == cursg->length) {
+ cursg = cmd->cursg = sg_next(cmd->cursg);
+ cmd->cursg_ofs = 0;
+ }
+
+ /* do the actual data transfer */
+ if (write)
+ hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
+ else
+ hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
+
+ kunmap_atomic(buf);
+
+ if (page_is_high)
+ local_irq_restore_nort(flags);
+
+ len -= nr_bytes;
+ }
+}
+EXPORT_SYMBOL_GPL(ide_pio_bytes);
+
+static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write)
+{
+ unsigned int nr_bytes;
+
+ u8 saved_io_32bit = drive->io_32bit;
+
+ if (cmd->tf_flags & IDE_TFLAG_FS)
+ cmd->rq->errors = 0;
+
+ if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
+ drive->io_32bit = 0;
+
+ touch_softlockup_watchdog();
+
+ if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
+ nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
+ else
+ nr_bytes = SECTOR_SIZE;
+
+ ide_pio_bytes(drive, cmd, write, nr_bytes);
+
+ drive->io_32bit = saved_io_32bit;
+}
+
+static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ if (cmd->tf_flags & IDE_TFLAG_FS) {
+ int nr_bytes = cmd->nbytes - cmd->nleft;
+
+ if (cmd->protocol == ATA_PROT_PIO &&
+ ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
+ if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
+ nr_bytes -= drive->mult_count << 9;
+ else
+ nr_bytes -= SECTOR_SIZE;
+ }
+
+ if (nr_bytes > 0)
+ ide_complete_rq(drive, 0, nr_bytes);
+ }
+}
+
+void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
+{
+ struct request *rq = drive->hwif->rq;
+ u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
+ u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
+
+ ide_complete_cmd(drive, cmd, stat, err);
+ rq->errors = err;
+
+ if (err == 0 && set_xfer) {
+ ide_set_xfer_rate(drive, nsect);
+ ide_driveid_update(drive);
+ }
+
+ ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
+}
+
+/*
+ * Handler for command with PIO data phase.
+ */
+static ide_startstop_t task_pio_intr(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &drive->hwif->cmd;
+ u8 stat = hwif->tp_ops->read_status(hwif);
+ u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+
+ if (write == 0) {
+ /* Error? */
+ if (stat & ATA_ERR)
+ goto out_err;
+
+ /* Didn't want any data? Odd. */
+ if ((stat & ATA_DRQ) == 0) {
+ /* Command all done? */
+ if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
+ goto out_end;
+
+ /* Assume it was a spurious irq */
+ goto out_wait;
+ }
+ } else {
+ if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
+ goto out_err;
+
+ /* Deal with unexpected ATA data phase. */
+ if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
+ goto out_err;
+ }
+
+ if (write && cmd->nleft == 0)
+ goto out_end;
+
+ /* Still data left to transfer. */
+ ide_pio_datablock(drive, cmd, write);
+
+ /* Are we done? Check status and finish transfer. */
+ if (write == 0 && cmd->nleft == 0) {
+ stat = wait_drive_not_busy(drive);
+ if (!OK_STAT(stat, 0, BAD_STAT))
+ goto out_err;
+
+ goto out_end;
+ }
+out_wait:
+ /* Still data left to transfer. */
+ ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
+ return ide_started;
+out_end:
+ if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
+ ide_finish_cmd(drive, cmd, stat);
+ else
+ ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
+ return ide_stopped;
+out_err:
+ ide_error_cmd(drive, cmd);
+ return ide_error(drive, __func__, stat);
+}
+
+static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
+ struct ide_cmd *cmd)
+{
+ ide_startstop_t startstop;
+
+ if (ide_wait_stat(&startstop, drive, ATA_DRQ,
+ drive->bad_wstat, WAIT_DRQ)) {
+ pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
+ (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
+ (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
+ return startstop;
+ }
+
+ if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
+ local_irq_disable_nort();
+
+ ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
+
+ ide_pio_datablock(drive, cmd, 1);
+
+ return ide_started;
+}
+
+int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
+ u16 nsect)
+{
+ struct request *rq;
+ int error;
+ int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
+
+ rq = blk_get_request(drive->queue, rw, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
+
+ /*
+ * (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 (nsect) {
+ error = blk_rq_map_kern(drive->queue, rq, buf,
+ nsect * SECTOR_SIZE, __GFP_WAIT);
+ if (error)
+ goto put_req;
+ }
+
+ rq->special = cmd;
+ cmd->rq = rq;
+
+ error = blk_execute_rq(drive->queue, NULL, rq, 0);
+
+put_req:
+ blk_put_request(rq);
+ return error;
+}
+EXPORT_SYMBOL(ide_raw_taskfile);
+
+int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ cmd->protocol = ATA_PROT_NODATA;
+
+ return ide_raw_taskfile(drive, cmd, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
+
+#ifdef CONFIG_IDE_TASK_IOCTL
+int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
+{
+ ide_task_request_t *req_task;
+ struct ide_cmd cmd;
+ u8 *outbuf = NULL;
+ u8 *inbuf = NULL;
+ u8 *data_buf = NULL;
+ int err = 0;
+ int tasksize = sizeof(struct ide_task_request_s);
+ unsigned int taskin = 0;
+ unsigned int taskout = 0;
+ u16 nsect = 0;
+ char __user *buf = (char __user *)arg;
+
+ req_task = memdup_user(buf, tasksize);
+ if (IS_ERR(req_task))
+ return PTR_ERR(req_task);
+
+ 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(&cmd, 0, sizeof(cmd));
+
+ memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
+ memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
+
+ cmd.valid.out.tf = IDE_VALID_DEVICE;
+ cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
+ cmd.tf_flags = IDE_TFLAG_IO_16BIT;
+
+ if (drive->dev_flags & IDE_DFLAG_LBA48) {
+ cmd.tf_flags |= IDE_TFLAG_LBA48;
+ cmd.valid.in.hob = IDE_VALID_IN_HOB;
+ }
+
+ if (req_task->out_flags.all) {
+ cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
+
+ if (req_task->out_flags.b.data)
+ cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
+
+ if (req_task->out_flags.b.nsector_hob)
+ cmd.valid.out.hob |= IDE_VALID_NSECT;
+ if (req_task->out_flags.b.sector_hob)
+ cmd.valid.out.hob |= IDE_VALID_LBAL;
+ if (req_task->out_flags.b.lcyl_hob)
+ cmd.valid.out.hob |= IDE_VALID_LBAM;
+ if (req_task->out_flags.b.hcyl_hob)
+ cmd.valid.out.hob |= IDE_VALID_LBAH;
+
+ if (req_task->out_flags.b.error_feature)
+ cmd.valid.out.tf |= IDE_VALID_FEATURE;
+ if (req_task->out_flags.b.nsector)
+ cmd.valid.out.tf |= IDE_VALID_NSECT;
+ if (req_task->out_flags.b.sector)
+ cmd.valid.out.tf |= IDE_VALID_LBAL;
+ if (req_task->out_flags.b.lcyl)
+ cmd.valid.out.tf |= IDE_VALID_LBAM;
+ if (req_task->out_flags.b.hcyl)
+ cmd.valid.out.tf |= IDE_VALID_LBAH;
+ } else {
+ cmd.valid.out.tf |= IDE_VALID_OUT_TF;
+ if (cmd.tf_flags & IDE_TFLAG_LBA48)
+ cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
+ }
+
+ if (req_task->in_flags.b.data)
+ cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
+
+ if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
+ /* fixup data phase if needed */
+ if (req_task->data_phase == TASKFILE_IN_DMAQ ||
+ req_task->data_phase == TASKFILE_IN_DMA)
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+ }
+
+ cmd.protocol = ATA_PROT_DMA;
+
+ switch (req_task->data_phase) {
+ case TASKFILE_MULTI_OUT:
+ if (!drive->mult_count) {
+ /* (hs): give up if multcount is not set */
+ pr_err("%s: %s Multimode Write multcount is not set\n",
+ drive->name, __func__);
+ err = -EPERM;
+ goto abort;
+ }
+ cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+ /* fall through */
+ case TASKFILE_OUT:
+ cmd.protocol = ATA_PROT_PIO;
+ /* fall through */
+ case TASKFILE_OUT_DMAQ:
+ case TASKFILE_OUT_DMA:
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+ nsect = taskout / SECTOR_SIZE;
+ data_buf = outbuf;
+ break;
+ case TASKFILE_MULTI_IN:
+ if (!drive->mult_count) {
+ /* (hs): give up if multcount is not set */
+ pr_err("%s: %s Multimode Read multcount is not set\n",
+ drive->name, __func__);
+ err = -EPERM;
+ goto abort;
+ }
+ cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+ /* fall through */
+ case TASKFILE_IN:
+ cmd.protocol = ATA_PROT_PIO;
+ /* fall through */
+ case TASKFILE_IN_DMAQ:
+ case TASKFILE_IN_DMA:
+ nsect = taskin / SECTOR_SIZE;
+ data_buf = inbuf;
+ break;
+ case TASKFILE_NO_DATA:
+ cmd.protocol = ATA_PROT_NODATA;
+ break;
+ default:
+ err = -EFAULT;
+ goto abort;
+ }
+
+ if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
+ nsect = 0;
+ else if (!nsect) {
+ nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
+
+ if (!nsect) {
+ pr_err("%s: in/out command without data\n",
+ drive->name);
+ err = -EFAULT;
+ goto abort;
+ }
+ }
+
+ err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
+
+ memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
+ memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
+
+ if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
+ req_task->in_flags.all == 0) {
+ req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
+ if (drive->dev_flags & IDE_DFLAG_LBA48)
+ req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
+ }
+
+ 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);
+
+ return err;
+}
+#endif
Code Review / kvmfornfv.git / blobdiff