/*
- libata-core.c - helper library for ATA
-
- Copyright 2003-2004 Red Hat, Inc. All rights reserved.
- Copyright 2003-2004 Jeff Garzik
-
- The contents of this file are subject to the Open
- Software License version 1.1 that can be found at
- http://www.opensource.org/licenses/osl-1.1.txt and is included herein
- by reference.
-
- Alternatively, the contents of this file may be used under the terms
- of the GNU General Public License version 2 (the "GPL") as distributed
- in the kernel source COPYING file, in which case the provisions of
- the GPL are applicable instead of the above. If you wish to allow
- the use of your version of this file only under the terms of the
- GPL and not to allow others to use your version of this file under
- the OSL, indicate your decision by deleting the provisions above and
- replace them with the notice and other provisions required by the GPL.
- If you do not delete the provisions above, a recipient may use your
- version of this file under either the OSL or the GPL.
-
+ * libata-core.c - helper library for ATA
+ *
+ * Maintained by: Jeff Garzik <jgarzik@pobox.com>
+ * Please ALWAYS copy linux-ide@vger.kernel.org
+ * on emails.
+ *
+ * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
+ * Copyright 2003-2004 Jeff Garzik
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * libata documentation is available via 'make {ps|pdf}docs',
+ * as Documentation/DocBook/libata.*
+ *
+ * Hardware documentation available from http://www.t13.org/ and
+ * http://www.sata-io.org/
+ *
*/
#include <linux/config.h>
#include <linux/completion.h>
#include <linux/suspend.h>
#include <linux/workqueue.h>
+#include <linux/jiffies.h>
#include <scsi/scsi.h>
#include "scsi.h"
#include "scsi_priv.h"
static unsigned int ata_busy_sleep (struct ata_port *ap,
unsigned long tmout_pat,
unsigned long tmout);
+static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev);
static void ata_set_mode(struct ata_port *ap);
static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift);
static int ata_choose_xfer_mode(struct ata_port *ap,
u8 *xfer_mode_out,
unsigned int *xfer_shift_out);
-static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat);
static void __ata_qc_complete(struct ata_queued_cmd *qc);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
+int atapi_enabled = 0;
+module_param(atapi_enabled, int, 0444);
+MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
+
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Library module for ATA devices");
MODULE_LICENSE("GPL");
static void ata_dev_identify(struct ata_port *ap, unsigned int device)
{
struct ata_device *dev = &ap->device[device];
- unsigned int i;
+ unsigned int major_version;
u16 tmp;
unsigned long xfer_modes;
u8 status;
* common ATA, ATAPI feature tests
*/
- /* we require LBA and DMA support (bits 8 & 9 of word 49) */
- if (!ata_id_has_dma(dev->id) || !ata_id_has_lba(dev->id)) {
- printk(KERN_DEBUG "ata%u: no dma/lba\n", ap->id);
+ /* we require DMA support (bits 8 of word 49) */
+ if (!ata_id_has_dma(dev->id)) {
+ printk(KERN_DEBUG "ata%u: no dma\n", ap->id);
goto err_out_nosup;
}
if (!ata_id_is_ata(dev->id)) /* sanity check */
goto err_out_nosup;
+ /* get major version */
tmp = dev->id[ATA_ID_MAJOR_VER];
- for (i = 14; i >= 1; i--)
- if (tmp & (1 << i))
+ for (major_version = 14; major_version >= 1; major_version--)
+ if (tmp & (1 << major_version))
break;
- /* we require at least ATA-3 */
- if (i < 3) {
- printk(KERN_DEBUG "ata%u: no ATA-3\n", ap->id);
- goto err_out_nosup;
- }
+ /*
+ * The exact sequence expected by certain pre-ATA4 drives is:
+ * SRST RESET
+ * IDENTIFY
+ * INITIALIZE DEVICE PARAMETERS
+ * anything else..
+ * Some drives were very specific about that exact sequence.
+ */
+ if (major_version < 4 || (!ata_id_has_lba(dev->id)))
+ ata_dev_init_params(ap, dev);
+
+ if (ata_id_has_lba(dev->id)) {
+ dev->flags |= ATA_DFLAG_LBA;
+
+ if (ata_id_has_lba48(dev->id)) {
+ dev->flags |= ATA_DFLAG_LBA48;
+ dev->n_sectors = ata_id_u64(dev->id, 100);
+ } else {
+ dev->n_sectors = ata_id_u32(dev->id, 60);
+ }
+
+ /* print device info to dmesg */
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
+ ap->id, device,
+ major_version,
+ ata_mode_string(xfer_modes),
+ (unsigned long long)dev->n_sectors,
+ dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
+ } else {
+ /* CHS */
+
+ /* Default translation */
+ dev->cylinders = dev->id[1];
+ dev->heads = dev->id[3];
+ dev->sectors = dev->id[6];
+ dev->n_sectors = dev->cylinders * dev->heads * dev->sectors;
+
+ if (ata_id_current_chs_valid(dev->id)) {
+ /* Current CHS translation is valid. */
+ dev->cylinders = dev->id[54];
+ dev->heads = dev->id[55];
+ dev->sectors = dev->id[56];
+
+ dev->n_sectors = ata_id_u32(dev->id, 57);
+ }
+
+ /* print device info to dmesg */
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
+ ap->id, device,
+ major_version,
+ ata_mode_string(xfer_modes),
+ (unsigned long long)dev->n_sectors,
+ (int)dev->cylinders, (int)dev->heads, (int)dev->sectors);
- if (ata_id_has_lba48(dev->id)) {
- dev->flags |= ATA_DFLAG_LBA48;
- dev->n_sectors = ata_id_u64(dev->id, 100);
- } else {
- dev->n_sectors = ata_id_u32(dev->id, 60);
}
ap->host->max_cmd_len = 16;
-
- /* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATA, max %s, %Lu sectors:%s\n",
- ap->id, device,
- ata_mode_string(xfer_modes),
- (unsigned long long)dev->n_sectors,
- dev->flags & ATA_DFLAG_LBA48 ? " lba48" : "");
}
/* ATAPI-specific feature tests */
/**
* ata_dev_config - Run device specific handlers and check for
* SATA->PATA bridges
- * @ap: Bus
+ * @ap: Bus
* @i: Device
*
* LOCKING:
*/
-
+
void ata_dev_config(struct ata_port *ap, unsigned int i)
{
/* limit bridge transfers to udma5, 200 sectors */
if (ap->flags & ATA_FLAG_SATA_RESET) {
/* issue phy wake/reset */
scr_write_flush(ap, SCR_CONTROL, 0x301);
- udelay(400); /* FIXME: a guess */
+ /* Couldn't find anything in SATA I/II specs, but
+ * AHCI-1.1 10.4.2 says at least 1 ms. */
+ mdelay(1);
}
scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
"HITACHI CDR-8335",
"HITACHI CDR-8435",
"Toshiba CD-ROM XM-6202B",
+ "TOSHIBA CD-ROM XM-1702BC",
"CD-532E-A",
"E-IDE CD-ROM CR-840",
"CD-ROM Drive/F5A",
"SAMSUNG CD-ROM SC-148C",
"SAMSUNG CD-ROM SC",
"SanDisk SDP3B-64",
- "SAMSUNG CD-ROM SN-124",
"ATAPI CD-ROM DRIVE 40X MAXIMUM",
"_NEC DV5800A",
};
}
/**
+ * ata_dev_init_params - Issue INIT DEV PARAMS command
+ * @ap: Port associated with device @dev
+ * @dev: Device to which command will be sent
+ *
+ * LOCKING:
+ */
+
+static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
+{
+ DECLARE_COMPLETION(wait);
+ struct ata_queued_cmd *qc;
+ int rc;
+ unsigned long flags;
+ u16 sectors = dev->id[6];
+ u16 heads = dev->id[3];
+
+ /* Number of sectors per track 1-255. Number of heads 1-16 */
+ if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
+ return;
+
+ /* set up init dev params taskfile */
+ DPRINTK("init dev params \n");
+
+ qc = ata_qc_new_init(ap, dev);
+ BUG_ON(qc == NULL);
+
+ qc->tf.command = ATA_CMD_INIT_DEV_PARAMS;
+ qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ qc->tf.protocol = ATA_PROT_NODATA;
+ qc->tf.nsect = sectors;
+ qc->tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
+
+ qc->waiting = &wait;
+ qc->complete_fn = ata_qc_complete_noop;
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ rc = ata_qc_issue(qc);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ if (rc)
+ ata_port_disable(ap);
+ else
+ wait_for_completion(&wait);
+
+ DPRINTK("EXIT\n");
+}
+
+/**
* ata_sg_clean - Unmap DMA memory associated with command
* @qc: Command containing DMA memory to be released
*
* spin_lock_irqsave(host_set lock)
*/
-
-
-/**
- * ata_sg_init_one - Prepare a one-entry scatter-gather list.
- * @qc: Queued command
- * @buf: transfer buffer
- * @buflen: length of buf
- *
- * Builds a single-entry scatter-gather list to initiate a
- * transfer utilizing the specified buffer.
- *
- * LOCKING:
- */
void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
{
struct scatterlist *sg;
* spin_lock_irqsave(host_set lock)
*/
-
-/**
- * ata_sg_init - Assign a scatter gather list to a queued command
- * @qc: Queued command
- * @sg: Scatter-gather list
- * @n_elem: length of sg list
- *
- * Attaches a scatter-gather list to a queued command.
- *
- * LOCKING:
- */
-
void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
unsigned int n_elem)
{
}
/**
+ * ata_poll_qc_complete - turn irq back on and finish qc
+ * @qc: Command to complete
+ * @drv_stat: ATA status register content
+ *
+ * LOCKING:
+ * None. (grabs host lock)
+ */
+
+void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_NOINTR;
+ ata_irq_on(ap);
+ ata_qc_complete(qc, drv_stat);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+}
+
+/**
* ata_pio_poll -
* @ap:
*
static unsigned long ata_pio_poll(struct ata_port *ap)
{
u8 status;
- unsigned int poll_state = PIO_ST_UNKNOWN;
- unsigned int reg_state = PIO_ST_UNKNOWN;
- const unsigned int tmout_state = PIO_ST_TMOUT;
-
- switch (ap->pio_task_state) {
- case PIO_ST:
- case PIO_ST_POLL:
- poll_state = PIO_ST_POLL;
- reg_state = PIO_ST;
+ unsigned int poll_state = HSM_ST_UNKNOWN;
+ unsigned int reg_state = HSM_ST_UNKNOWN;
+ const unsigned int tmout_state = HSM_ST_TMOUT;
+
+ switch (ap->hsm_task_state) {
+ case HSM_ST:
+ case HSM_ST_POLL:
+ poll_state = HSM_ST_POLL;
+ reg_state = HSM_ST;
break;
- case PIO_ST_LAST:
- case PIO_ST_LAST_POLL:
- poll_state = PIO_ST_LAST_POLL;
- reg_state = PIO_ST_LAST;
+ case HSM_ST_LAST:
+ case HSM_ST_LAST_POLL:
+ poll_state = HSM_ST_LAST_POLL;
+ reg_state = HSM_ST_LAST;
break;
default:
BUG();
status = ata_chk_status(ap);
if (status & ATA_BUSY) {
if (time_after(jiffies, ap->pio_task_timeout)) {
- ap->pio_task_state = tmout_state;
+ ap->hsm_task_state = tmout_state;
return 0;
}
- ap->pio_task_state = poll_state;
+ ap->hsm_task_state = poll_state;
return ATA_SHORT_PAUSE;
}
- ap->pio_task_state = reg_state;
+ ap->hsm_task_state = reg_state;
return 0;
}
*
* LOCKING:
* None. (executing in kernel thread context)
+ *
+ * RETURNS:
+ * Non-zero if qc completed, zero otherwise.
*/
-static void ata_pio_complete (struct ata_port *ap)
+static int ata_pio_complete (struct ata_port *ap)
{
struct ata_queued_cmd *qc;
u8 drv_stat;
/*
- * This is purely hueristic. This is a fast path.
- * Sometimes when we enter, BSY will be cleared in
- * a chk-status or two. If not, the drive is probably seeking
- * or something. Snooze for a couple msecs, then
- * chk-status again. If still busy, fall back to
- * PIO_ST_POLL state.
+ * This is purely heuristic. This is a fast path. Sometimes when
+ * we enter, BSY will be cleared in a chk-status or two. If not,
+ * the drive is probably seeking or something. Snooze for a couple
+ * msecs, then chk-status again. If still busy, fall back to
+ * HSM_ST_POLL state.
*/
drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10);
if (drv_stat & (ATA_BUSY | ATA_DRQ)) {
msleep(2);
drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10);
if (drv_stat & (ATA_BUSY | ATA_DRQ)) {
- ap->pio_task_state = PIO_ST_LAST_POLL;
+ ap->hsm_task_state = HSM_ST_LAST_POLL;
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
- return;
+ return 0;
}
}
drv_stat = ata_wait_idle(ap);
if (!ata_ok(drv_stat)) {
- ap->pio_task_state = PIO_ST_ERR;
- return;
+ ap->hsm_task_state = HSM_ST_ERR;
+ return 0;
}
qc = ata_qc_from_tag(ap, ap->active_tag);
assert(qc != NULL);
- ap->pio_task_state = PIO_ST_IDLE;
+ ap->hsm_task_state = HSM_ST_IDLE;
- ata_irq_on(ap);
+ ata_poll_qc_complete(qc, drv_stat);
- ata_qc_complete(qc, drv_stat);
+ /* another command may start at this point */
+
+ return 1;
}
#endif /* __BIG_ENDIAN */
}
+/**
+ * ata_mmio_data_xfer - Transfer data by MMIO
+ * @ap: port to read/write
+ * @buf: data buffer
+ * @buflen: buffer length
+ * @write_data: read/write
+ *
+ * Transfer data from/to the device data register by MMIO.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
unsigned int buflen, int write_data)
{
u16 *buf16 = (u16 *) buf;
void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
+ /* Transfer multiple of 2 bytes */
if (write_data) {
for (i = 0; i < words; i++)
writew(le16_to_cpu(buf16[i]), mmio);
for (i = 0; i < words; i++)
buf16[i] = cpu_to_le16(readw(mmio));
}
+
+ /* Transfer trailing 1 byte, if any. */
+ if (unlikely(buflen & 0x01)) {
+ u16 align_buf[1] = { 0 };
+ unsigned char *trailing_buf = buf + buflen - 1;
+
+ if (write_data) {
+ memcpy(align_buf, trailing_buf, 1);
+ writew(le16_to_cpu(align_buf[0]), mmio);
+ } else {
+ align_buf[0] = cpu_to_le16(readw(mmio));
+ memcpy(trailing_buf, align_buf, 1);
+ }
+ }
}
+/**
+ * ata_pio_data_xfer - Transfer data by PIO
+ * @ap: port to read/write
+ * @buf: data buffer
+ * @buflen: buffer length
+ * @write_data: read/write
+ *
+ * Transfer data from/to the device data register by PIO.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
unsigned int buflen, int write_data)
{
- unsigned int dwords = buflen >> 1;
+ unsigned int words = buflen >> 1;
+ /* Transfer multiple of 2 bytes */
if (write_data)
- outsw(ap->ioaddr.data_addr, buf, dwords);
+ outsw(ap->ioaddr.data_addr, buf, words);
else
- insw(ap->ioaddr.data_addr, buf, dwords);
+ insw(ap->ioaddr.data_addr, buf, words);
+
+ /* Transfer trailing 1 byte, if any. */
+ if (unlikely(buflen & 0x01)) {
+ u16 align_buf[1] = { 0 };
+ unsigned char *trailing_buf = buf + buflen - 1;
+
+ if (write_data) {
+ memcpy(align_buf, trailing_buf, 1);
+ outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
+ } else {
+ align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
+ memcpy(trailing_buf, align_buf, 1);
+ }
+ }
}
+/**
+ * ata_data_xfer - Transfer data from/to the data register.
+ * @ap: port to read/write
+ * @buf: data buffer
+ * @buflen: buffer length
+ * @do_write: read/write
+ *
+ * Transfer data from/to the device data register.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
unsigned int buflen, int do_write)
{
ata_pio_data_xfer(ap, buf, buflen, do_write);
}
+/**
+ * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
+ * @qc: Command on going
+ *
+ * Transfer ATA_SECT_SIZE of data from/to the ATA device.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
static void ata_pio_sector(struct ata_queued_cmd *qc)
{
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
unsigned char *buf;
if (qc->cursect == (qc->nsect - 1))
- ap->pio_task_state = PIO_ST_LAST;
+ ap->hsm_task_state = HSM_ST_LAST;
page = sg[qc->cursg].page;
offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
kunmap(page);
}
+/**
+ * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
+ * @qc: Command on going
+ * @bytes: number of bytes
+ *
+ * Transfer Transfer data from/to the ATAPI device.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
{
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
unsigned char *buf;
unsigned int offset, count;
- if (qc->curbytes == qc->nbytes - bytes)
- ap->pio_task_state = PIO_ST_LAST;
+ if (qc->curbytes + bytes >= qc->nbytes)
+ ap->hsm_task_state = HSM_ST_LAST;
next_sg:
+ if (unlikely(qc->cursg >= qc->n_elem)) {
+ /*
+ * The end of qc->sg is reached and the device expects
+ * more data to transfer. In order not to overrun qc->sg
+ * and fulfill length specified in the byte count register,
+ * - for read case, discard trailing data from the device
+ * - for write case, padding zero data to the device
+ */
+ u16 pad_buf[1] = { 0 };
+ unsigned int words = bytes >> 1;
+ unsigned int i;
+
+ if (words) /* warning if bytes > 1 */
+ printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
+ ap->id, bytes);
+
+ for (i = 0; i < words; i++)
+ ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
+
+ ap->hsm_task_state = HSM_ST_LAST;
+ return;
+ }
+
sg = &qc->sg[qc->cursg];
page = sg->page;
kunmap(page);
- if (bytes) {
+ if (bytes)
goto next_sg;
- }
}
+/**
+ * atapi_pio_bytes - Transfer data from/to the ATAPI device.
+ * @qc: Command on going
+ *
+ * Transfer Transfer data from/to the ATAPI device.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
static void atapi_pio_bytes(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
err_out:
printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
ap->id, dev->devno);
- ap->pio_task_state = PIO_ST_ERR;
+ ap->hsm_task_state = HSM_ST_ERR;
}
/**
* a chk-status or two. If not, the drive is probably seeking
* or something. Snooze for a couple msecs, then
* chk-status again. If still busy, fall back to
- * PIO_ST_POLL state.
+ * HSM_ST_POLL state.
*/
status = ata_busy_wait(ap, ATA_BUSY, 5);
if (status & ATA_BUSY) {
msleep(2);
status = ata_busy_wait(ap, ATA_BUSY, 10);
if (status & ATA_BUSY) {
- ap->pio_task_state = PIO_ST_POLL;
+ ap->hsm_task_state = HSM_ST_POLL;
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
return;
}
if (is_atapi_taskfile(&qc->tf)) {
/* no more data to transfer or unsupported ATAPI command */
if ((status & ATA_DRQ) == 0) {
- ap->pio_task_state = PIO_ST_IDLE;
-
- ata_irq_on(ap);
-
- ata_qc_complete(qc, status);
+ ap->hsm_task_state = HSM_ST_LAST;
return;
}
} else {
/* handle BSY=0, DRQ=0 as error */
if ((status & ATA_DRQ) == 0) {
- ap->pio_task_state = PIO_ST_ERR;
+ ap->hsm_task_state = HSM_ST_ERR;
return;
}
printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n",
ap->id, drv_stat);
- ap->pio_task_state = PIO_ST_IDLE;
+ ap->hsm_task_state = HSM_ST_IDLE;
- ata_irq_on(ap);
-
- ata_qc_complete(qc, drv_stat | ATA_ERR);
+ ata_poll_qc_complete(qc, drv_stat | ATA_ERR);
}
static void ata_pio_task(void *_data)
{
struct ata_port *ap = _data;
- unsigned long timeout = 0;
+ unsigned long timeout;
+ int qc_completed;
+
+fsm_start:
+ timeout = 0;
+ qc_completed = 0;
- switch (ap->pio_task_state) {
- case PIO_ST_IDLE:
+ switch (ap->hsm_task_state) {
+ case HSM_ST_IDLE:
return;
- case PIO_ST:
+ case HSM_ST:
ata_pio_block(ap);
break;
- case PIO_ST_LAST:
- ata_pio_complete(ap);
+ case HSM_ST_LAST:
+ qc_completed = ata_pio_complete(ap);
break;
- case PIO_ST_POLL:
- case PIO_ST_LAST_POLL:
+ case HSM_ST_POLL:
+ case HSM_ST_LAST_POLL:
timeout = ata_pio_poll(ap);
break;
- case PIO_ST_TMOUT:
- case PIO_ST_ERR:
+ case HSM_ST_TMOUT:
+ case HSM_ST_ERR:
ata_pio_error(ap);
return;
}
if (timeout)
- queue_delayed_work(ata_wq, &ap->pio_task,
- timeout);
- else
- queue_work(ata_wq, &ap->pio_task);
-}
-
-static void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
- struct scsi_cmnd *cmd)
-{
- DECLARE_COMPLETION(wait);
- struct ata_queued_cmd *qc;
- unsigned long flags;
- int rc;
-
- DPRINTK("ATAPI request sense\n");
-
- qc = ata_qc_new_init(ap, dev);
- BUG_ON(qc == NULL);
-
- /* FIXME: is this needed? */
- memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
-
- ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
- qc->dma_dir = DMA_FROM_DEVICE;
-
- memset(&qc->cdb, 0, ap->cdb_len);
- qc->cdb[0] = REQUEST_SENSE;
- qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
-
- qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
- qc->tf.command = ATA_CMD_PACKET;
-
- qc->tf.protocol = ATA_PROT_ATAPI;
- qc->tf.lbam = (8 * 1024) & 0xff;
- qc->tf.lbah = (8 * 1024) >> 8;
- qc->nbytes = SCSI_SENSE_BUFFERSIZE;
-
- qc->waiting = &wait;
- qc->complete_fn = ata_qc_complete_noop;
-
- spin_lock_irqsave(&ap->host_set->lock, flags);
- rc = ata_qc_issue(qc);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- if (rc)
- ata_port_disable(ap);
- else
- wait_for_completion(&wait);
-
- DPRINTK("EXIT\n");
+ queue_delayed_work(ata_wq, &ap->pio_task, timeout);
+ else if (!qc_completed)
+ goto fsm_start;
}
/**
static void ata_qc_timeout(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
+ struct ata_host_set *host_set = ap->host_set;
struct ata_device *dev = qc->dev;
u8 host_stat = 0, drv_stat;
+ unsigned long flags;
DPRINTK("ENTER\n");
if (qc->dev->class == ATA_DEV_ATAPI && qc->scsicmd) {
struct scsi_cmnd *cmd = qc->scsicmd;
- if (!scsi_eh_eflags_chk(cmd, SCSI_EH_CANCEL_CMD)) {
+ if (!(cmd->eh_eflags & SCSI_EH_CANCEL_CMD)) {
/* finish completing original command */
+ spin_lock_irqsave(&host_set->lock, flags);
__ata_qc_complete(qc);
+ spin_unlock_irqrestore(&host_set->lock, flags);
atapi_request_sense(ap, dev, cmd);
}
}
+ spin_lock_irqsave(&host_set->lock, flags);
+
/* hack alert! We cannot use the supplied completion
* function from inside the ->eh_strategy_handler() thread.
* libata is the only user of ->eh_strategy_handler() in
host_stat = ap->ops->bmdma_status(ap);
/* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(ap);
+ ap->ops->bmdma_stop(qc);
/* fall through */
ata_qc_complete(qc, drv_stat);
break;
}
+
+ spin_unlock_irqrestore(&host_set->lock, flags);
+
out:
DPRINTK("EXIT\n");
}
ata_tf_init(ap, &qc->tf, dev->devno);
- if (dev->flags & ATA_DFLAG_LBA48)
- qc->tf.flags |= ATA_TFLAG_LBA48;
+ if (dev->flags & ATA_DFLAG_LBA) {
+ qc->tf.flags |= ATA_TFLAG_LBA;
+
+ if (dev->flags & ATA_DFLAG_LBA48)
+ qc->tf.flags |= ATA_TFLAG_LBA48;
+ }
}
return qc;
}
-static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat)
+int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat)
{
return 0;
}
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
ata_sg_clean(qc);
+ /* atapi: mark qc as inactive to prevent the interrupt handler
+ * from completing the command twice later, before the error handler
+ * is called. (when rc != 0 and atapi request sense is needed)
+ */
+ qc->flags &= ~ATA_QCFLAG_ACTIVE;
+
/* call completion callback */
rc = qc->complete_fn(qc, drv_stat);
- qc->flags &= ~ATA_QCFLAG_ACTIVE;
/* if callback indicates not to complete command (non-zero),
* return immediately
case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
ata_qc_set_polling(qc);
ata_tf_to_host_nolock(ap, &qc->tf);
- ap->pio_task_state = PIO_ST;
+ ap->hsm_task_state = HSM_ST;
queue_work(ata_wq, &ap->pio_task);
break;
break;
case ATA_PROT_ATAPI_NODATA:
+ ap->flags |= ATA_FLAG_NOINTR;
ata_tf_to_host_nolock(ap, &qc->tf);
queue_work(ata_wq, &ap->packet_task);
break;
case ATA_PROT_ATAPI_DMA:
+ ap->flags |= ATA_FLAG_NOINTR;
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
queue_work(ata_wq, &ap->packet_task);
}
/**
- * ata_bmdma_start - Start a PCI IDE BMDMA transaction
+ * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
* @qc: Info associated with this ATA transaction.
*
* LOCKING:
void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
host_stat = readb(mmio + ATA_DMA_STATUS);
} else
- host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
return host_stat;
}
/**
* ata_bmdma_stop - Stop PCI IDE BMDMA transfer
- * @ap: Port associated with this ATA transaction.
+ * @qc: Command we are ending DMA for
*
* Clears the ATA_DMA_START flag in the dma control register
*
* spin_lock_irqsave(host_set lock)
*/
-void ata_bmdma_stop(struct ata_port *ap)
+void ata_bmdma_stop(struct ata_queued_cmd *qc)
{
+ struct ata_port *ap = qc->ap;
if (ap->flags & ATA_FLAG_MMIO) {
void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
goto idle_irq;
/* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(ap);
+ ap->ops->bmdma_stop(qc);
/* fall through */
struct ata_port *ap;
ap = host_set->ports[i];
- if (ap && (!(ap->flags & ATA_FLAG_PORT_DISABLED))) {
+ if (ap &&
+ !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
/* send SCSI cdb */
DPRINTK("send cdb\n");
assert(ap->cdb_len >= 12);
- ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
- /* if we are DMA'ing, irq handler takes over from here */
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
- ap->ops->bmdma_start(qc); /* initiate bmdma */
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
+ qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
+ unsigned long flags;
- /* non-data commands are also handled via irq */
- else if (qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- /* do nothing */
- }
+ /* Once we're done issuing command and kicking bmdma,
+ * irq handler takes over. To not lose irq, we need
+ * to clear NOINTR flag before sending cdb, but
+ * interrupt handler shouldn't be invoked before we're
+ * finished. Hence, the following locking.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_NOINTR;
+ ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
+ ap->ops->bmdma_start(qc); /* initiate bmdma */
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ } else {
+ ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
- /* PIO commands are handled by polling */
- else {
- ap->pio_task_state = PIO_ST;
+ /* PIO commands are handled by polling */
+ ap->hsm_task_state = HSM_ST;
queue_work(ata_wq, &ap->pio_task);
}
return;
err_out:
- ata_qc_complete(qc, ATA_ERR);
+ ata_poll_qc_complete(qc, ATA_ERR);
}
host->max_channel = 1;
host->unique_id = ata_unique_id++;
host->max_cmd_len = 12;
- scsi_set_device(host, ent->dev);
+
scsi_assign_lock(host, &host_set->lock);
ap->flags = ATA_FLAG_PORT_DISABLED;
for (i = 0; i < count; i++) {
struct ata_port *ap = host_set->ports[i];
- scsi_scan_host(ap->host);
+ ata_scsi_scan_host(ap);
}
dev_set_drvdata(dev, host_set);
}
/**
+ * ata_host_set_remove - PCI layer callback for device removal
+ * @host_set: ATA host set that was removed
+ *
+ * Unregister all objects associated with this host set. Free those
+ * objects.
+ *
+ * LOCKING:
+ * Inherited from calling layer (may sleep).
+ */
+
+
+void ata_host_set_remove(struct ata_host_set *host_set)
+{
+ struct ata_port *ap;
+ unsigned int i;
+
+ for (i = 0; i < host_set->n_ports; i++) {
+ ap = host_set->ports[i];
+ scsi_remove_host(ap->host);
+ }
+
+ free_irq(host_set->irq, host_set);
+
+ for (i = 0; i < host_set->n_ports; i++) {
+ ap = host_set->ports[i];
+
+ ata_scsi_release(ap->host);
+
+ if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ if (ioaddr->cmd_addr == 0x1f0)
+ release_region(0x1f0, 8);
+ else if (ioaddr->cmd_addr == 0x170)
+ release_region(0x170, 8);
+ }
+
+ scsi_host_put(ap->host);
+ }
+
+ if (host_set->ops->host_stop)
+ host_set->ops->host_stop(host_set);
+
+ kfree(host_set);
+}
+
+/**
* ata_scsi_release - SCSI layer callback hook for host unload
* @host: libata host to be unloaded
*
+#ifdef CONFIG_PCI
+
+void ata_pci_host_stop (struct ata_host_set *host_set)
+{
+ struct pci_dev *pdev = to_pci_dev(host_set->dev);
+
+ pci_iounmap(pdev, host_set->mmio_base);
+}
+
/**
* ata_pci_init_native_mode - Initialize native-mode driver
* @pdev: pci device to be initialized
* @port: array[2] of pointers to port info structures.
+ * @ports: bitmap of ports present
*
* Utility function which allocates and initializes an
* ata_probe_ent structure for a standard dual-port
* PIO-based IDE controller. The returned ata_probe_ent
* structure can be passed to ata_device_add(). The returned
* ata_probe_ent structure should then be freed with kfree().
+ *
+ * The caller need only pass the address of the primary port, the
+ * secondary will be deduced automatically. If the device has non
+ * standard secondary port mappings this function can be called twice,
+ * once for each interface.
*/
-#ifdef CONFIG_PCI
struct ata_probe_ent *
-ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port)
+ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
{
struct ata_probe_ent *probe_ent =
ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
+ int p = 0;
+
if (!probe_ent)
return NULL;
- probe_ent->n_ports = 2;
probe_ent->irq = pdev->irq;
probe_ent->irq_flags = SA_SHIRQ;
- probe_ent->port[0].cmd_addr = pci_resource_start(pdev, 0);
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr =
- pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
- probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4);
-
- probe_ent->port[1].cmd_addr = pci_resource_start(pdev, 2);
- probe_ent->port[1].altstatus_addr =
- probe_ent->port[1].ctl_addr =
- pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
- probe_ent->port[1].bmdma_addr = pci_resource_start(pdev, 4) + 8;
+ if (ports & ATA_PORT_PRIMARY) {
+ probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0);
+ probe_ent->port[p].altstatus_addr =
+ probe_ent->port[p].ctl_addr =
+ pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
+ probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4);
+ ata_std_ports(&probe_ent->port[p]);
+ p++;
+ }
- ata_std_ports(&probe_ent->port[0]);
- ata_std_ports(&probe_ent->port[1]);
+ if (ports & ATA_PORT_SECONDARY) {
+ probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2);
+ probe_ent->port[p].altstatus_addr =
+ probe_ent->port[p].ctl_addr =
+ pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
+ probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8;
+ ata_std_ports(&probe_ent->port[p]);
+ p++;
+ }
+ probe_ent->n_ports = p;
return probe_ent;
}
-static struct ata_probe_ent *
-ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port,
- struct ata_probe_ent **ppe2)
+static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info **port, int port_num)
{
- struct ata_probe_ent *probe_ent, *probe_ent2;
+ struct ata_probe_ent *probe_ent;
probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
if (!probe_ent)
return NULL;
- probe_ent2 = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[1]);
- if (!probe_ent2) {
- kfree(probe_ent);
- return NULL;
- }
- probe_ent->n_ports = 1;
- probe_ent->irq = 14;
-
- probe_ent->hard_port_no = 0;
+
probe_ent->legacy_mode = 1;
-
- probe_ent2->n_ports = 1;
- probe_ent2->irq = 15;
-
- probe_ent2->hard_port_no = 1;
- probe_ent2->legacy_mode = 1;
-
- probe_ent->port[0].cmd_addr = 0x1f0;
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr = 0x3f6;
- probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4);
-
- probe_ent2->port[0].cmd_addr = 0x170;
- probe_ent2->port[0].altstatus_addr =
- probe_ent2->port[0].ctl_addr = 0x376;
- probe_ent2->port[0].bmdma_addr = pci_resource_start(pdev, 4)+8;
-
+ probe_ent->n_ports = 1;
+ probe_ent->hard_port_no = port_num;
+
+ switch(port_num)
+ {
+ case 0:
+ probe_ent->irq = 14;
+ probe_ent->port[0].cmd_addr = 0x1f0;
+ probe_ent->port[0].altstatus_addr =
+ probe_ent->port[0].ctl_addr = 0x3f6;
+ break;
+ case 1:
+ probe_ent->irq = 15;
+ probe_ent->port[0].cmd_addr = 0x170;
+ probe_ent->port[0].altstatus_addr =
+ probe_ent->port[0].ctl_addr = 0x376;
+ break;
+ }
+ probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num;
ata_std_ports(&probe_ent->port[0]);
- ata_std_ports(&probe_ent2->port[0]);
-
- *ppe2 = probe_ent2;
return probe_ent;
}
int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
unsigned int n_ports)
{
- struct ata_probe_ent *probe_ent, *probe_ent2 = NULL;
+ struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL;
struct ata_port_info *port[2];
u8 tmp8, mask;
unsigned int legacy_mode = 0;
if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0
&& (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
- /* TODO: support transitioning to native mode? */
+ /* TODO: What if one channel is in native mode ... */
pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
mask = (1 << 2) | (1 << 0);
if ((tmp8 & mask) != mask)
}
/* FIXME... */
- if ((!legacy_mode) && (n_ports > 1)) {
- printk(KERN_ERR "ata: BUG: native mode, n_ports > 1\n");
- return -EINVAL;
+ if ((!legacy_mode) && (n_ports > 2)) {
+ printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
+ n_ports = 2;
+ /* For now */
}
+ /* FIXME: Really for ATA it isn't safe because the device may be
+ multi-purpose and we want to leave it alone if it was already
+ enabled. Secondly for shared use as Arjan says we want refcounting
+
+ Checking dev->is_enabled is insufficient as this is not set at
+ boot for the primary video which is BIOS enabled
+ */
+
rc = pci_enable_device(pdev);
if (rc)
return rc;
goto err_out;
}
+ /* FIXME: Should use platform specific mappers for legacy port ranges */
if (legacy_mode) {
if (!request_region(0x1f0, 8, "libata")) {
struct resource *conflict, res;
goto err_out_regions;
if (legacy_mode) {
- probe_ent = ata_pci_init_legacy_mode(pdev, port, &probe_ent2);
- } else
- probe_ent = ata_pci_init_native_mode(pdev, port);
- if (!probe_ent) {
+ if (legacy_mode & (1 << 0))
+ probe_ent = ata_pci_init_legacy_port(pdev, port, 0);
+ if (legacy_mode & (1 << 1))
+ probe_ent2 = ata_pci_init_legacy_port(pdev, port, 1);
+ } else {
+ if (n_ports == 2)
+ probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
+ else
+ probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
+ }
+ if (!probe_ent && !probe_ent2) {
rc = -ENOMEM;
goto err_out_regions;
}
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host_set *host_set = dev_get_drvdata(dev);
- struct ata_port *ap;
- unsigned int i;
-
- for (i = 0; i < host_set->n_ports; i++) {
- ap = host_set->ports[i];
-
- scsi_remove_host(ap->host);
- }
-
- free_irq(host_set->irq, host_set);
-
- for (i = 0; i < host_set->n_ports; i++) {
- ap = host_set->ports[i];
-
- ata_scsi_release(ap->host);
-
- if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
- struct ata_ioports *ioaddr = &ap->ioaddr;
-
- if (ioaddr->cmd_addr == 0x1f0)
- release_region(0x1f0, 8);
- else if (ioaddr->cmd_addr == 0x170)
- release_region(0x170, 8);
- }
-
- scsi_host_put(ap->host);
- }
-
- if (host_set->ops->host_stop)
- host_set->ops->host_stop(host_set);
-
- kfree(host_set);
+ ata_host_set_remove(host_set);
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
module_init(ata_init);
module_exit(ata_exit);
+static unsigned long ratelimit_time;
+static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
+
+int ata_ratelimit(void)
+{
+ int rc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ata_ratelimit_lock, flags);
+
+ if (time_after(jiffies, ratelimit_time)) {
+ rc = 1;
+ ratelimit_time = jiffies + (HZ/5);
+ } else
+ rc = 0;
+
+ spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
+
+ return rc;
+}
+
/*
* libata is essentially a library of internal helper functions for
* low-level ATA host controller drivers. As such, the API/ABI is
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_std_ports);
EXPORT_SYMBOL_GPL(ata_device_add);
+EXPORT_SYMBOL_GPL(ata_host_set_remove);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_sg_init_one);
EXPORT_SYMBOL_GPL(ata_qc_complete);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
EXPORT_SYMBOL_GPL(ata_port_disable);
+EXPORT_SYMBOL_GPL(ata_ratelimit);
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_error);
#ifdef CONFIG_PCI
EXPORT_SYMBOL_GPL(pci_test_config_bits);
+EXPORT_SYMBOL_GPL(ata_pci_host_stop);
EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
EXPORT_SYMBOL_GPL(ata_pci_init_one);
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff