static unsigned int 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_dev_set_xfermode(struct ata_port *ap,
+ struct ata_device *dev);
+ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev);
+static void ata_pio_error(struct ata_port *ap);
- static unsigned int ata_dev_xfermask(struct ata_port *ap,
- struct ata_device *dev);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
* ata_rwcmd_protocol - set taskfile r/w commands and protocol
* @qc: command to examine and configure
*
- * Examine the device configuration and tf->flags to calculate
+ * Examine the device configuration and tf->flags to calculate
* the proper read/write commands and protocol to use.
*
* LOCKING:
u8 cmd;
int index, fua, lba48, write;
-
+
fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
}
+ /**
+ * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
+ * @xfer_mask: xfer_mask to unpack
+ * @pio_mask: resulting pio_mask
+ * @mwdma_mask: resulting mwdma_mask
+ * @udma_mask: resulting udma_mask
+ *
+ * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
+ * Any NULL distination masks will be ignored.
+ */
+ static void ata_unpack_xfermask(unsigned int xfer_mask,
+ unsigned int *pio_mask,
+ unsigned int *mwdma_mask,
+ unsigned int *udma_mask)
+ {
+ if (pio_mask)
+ *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
+ if (mwdma_mask)
+ *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
+ if (udma_mask)
+ *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
+ }
+
static const struct ata_xfer_ent {
unsigned int shift, bits;
u8 base;
return "<n/a>";
}
+ static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
+ {
+ if (ata_dev_present(dev)) {
+ printk(KERN_WARNING "ata%u: dev %u disabled\n",
+ ap->id, dev->devno);
+ dev->class++;
+ }
+ }
+
/**
* ata_pio_devchk - PATA device presence detection
* @ap: ATA channel to examine
ata_qc_free(qc);
+ /* XXX - Some LLDDs (sata_mv) disable port on command failure.
+ * Until those drivers are fixed, we detect the condition
+ * here, fail the command with AC_ERR_SYSTEM and reenable the
+ * port.
+ *
+ * Note that this doesn't change any behavior as internal
+ * command failure results in disabling the device in the
+ * higher layer for LLDDs without new reset/EH callbacks.
+ *
+ * Kill the following code as soon as those drivers are fixed.
+ */
+ if (ap->flags & ATA_FLAG_PORT_DISABLED) {
+ err_mask |= AC_ERR_SYSTEM;
+ ata_port_probe(ap);
+ }
+
return err_mask;
}
return 0;
if (speed > 2)
return 1;
-
+
/* If we have no drive specific rule, then PIO 2 is non IORDY */
if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
*
* Read ID data from the specified device. ATA_CMD_ID_ATA is
* performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
- * devices. This function also takes care of EDD signature
- * misreporting (to be removed once EDD support is gone) and
- * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives.
+ * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
+ * for pre-ATA4 drives.
*
* LOCKING:
* Kernel thread context (may sleep)
unsigned int *p_class, int post_reset, u16 **p_id)
{
unsigned int class = *p_class;
- unsigned int using_edd;
struct ata_taskfile tf;
unsigned int err_mask = 0;
u16 *id;
DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
- if (ap->ops->probe_reset ||
- ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET))
- using_edd = 0;
- else
- using_edd = 1;
-
ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
id, sizeof(id[0]) * ATA_ID_WORDS);
-
if (err_mask) {
rc = -EIO;
reason = "I/O error";
-
- if (err_mask & ~AC_ERR_DEV)
- goto err_out;
-
- /*
- * arg! EDD works for all test cases, but seems to return
- * the ATA signature for some ATAPI devices. Until the
- * reason for this is found and fixed, we fix up the mess
- * here. If IDENTIFY DEVICE returns command aborted
- * (as ATAPI devices do), then we issue an
- * IDENTIFY PACKET DEVICE.
- *
- * ATA software reset (SRST, the default) does not appear
- * to have this problem.
- */
- if ((using_edd) && (class == ATA_DEV_ATA)) {
- u8 err = tf.feature;
- if (err & ATA_ABORTED) {
- class = ATA_DEV_ATAPI;
- goto retry;
- }
- }
goto err_out;
}
dev->cylinders, dev->heads, dev->sectors);
}
- dev->cdb_len = 16;
+ if (dev->id[59] & 0x100) {
+ dev->multi_count = dev->id[59] & 0xff;
+ DPRINTK("ata%u: dev %u multi count %u\n",
+ ap->id, device, dev->multi_count);
+ }
+
}
/* ATAPI-specific feature tests */
}
dev->cdb_len = (unsigned int) rc;
+ if (ata_id_cdb_intr(dev->id))
+ dev->flags |= ATA_DFLAG_CDB_INTR;
+
/* print device info to dmesg */
if (print_info)
printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
if (print_info)
printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
ap->id, dev->devno);
- ap->udma_mask &= ATA_UDMA5;
+ dev->udma_mask &= ATA_UDMA5;
dev->max_sectors = ATA_MAX_SECTORS;
}
return 0;
err_out_nosup:
- printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
- ap->id, dev->devno);
DPRINTK("EXIT, err\n");
return rc;
}
}
if (ata_dev_configure(ap, dev, 1)) {
- dev->class++; /* disable device */
+ ata_dev_disable(ap, dev);
continue;
}
ata_bus_reset(ap);
}
+ /**
+ * ata_dev_pair - return other device on cable
+ * @ap: port
+ * @adev: device
+ *
+ * Obtain the other device on the same cable, or if none is
+ * present NULL is returned
+ */
+
+ struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
+ {
+ struct ata_device *pair = &ap->device[1 - adev->devno];
+ if (!ata_dev_present(pair))
+ return NULL;
+ return pair;
+ }
+
/**
* ata_port_disable - Disable port.
* @ap: Port to be disabled.
* PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
* These were taken from ATA/ATAPI-6 standard, rev 0a, except
* for PIO 5, which is a nonstandard extension and UDMA6, which
- * is currently supported only by Maxtor drives.
+ * is currently supported only by Maxtor drives.
*/
static const struct ata_timing ata_timing[] = {
{ XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
-
+
{ XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
{ XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
{ XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
-
+
{ XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
{ XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
{ XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
for (t = ata_timing; t->mode != speed; t++)
if (t->mode == 0xFF)
return NULL;
- return t;
+ return t;
}
int ata_timing_compute(struct ata_device *adev, unsigned short speed,
struct ata_timing p;
/*
- * Find the mode.
+ * Find the mode.
*/
if (!(s = ata_timing_find_mode(speed)))
return 0;
}
- static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
+ static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
{
- if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
- return;
+ unsigned int err_mask;
+ int rc;
if (dev->xfer_shift == ATA_SHIFT_PIO)
dev->flags |= ATA_DFLAG_PIO;
- ata_dev_set_xfermode(ap, dev);
+ err_mask = ata_dev_set_xfermode(ap, dev);
+ if (err_mask) {
+ printk(KERN_ERR
+ "ata%u: failed to set xfermode (err_mask=0x%x)\n",
+ ap->id, err_mask);
+ return -EIO;
+ }
- if (ata_dev_revalidate(ap, dev, 0)) {
- printk(KERN_ERR "ata%u: failed to revalidate after set "
- "xfermode, disabled\n", ap->id);
- ata_port_disable(ap);
+ rc = ata_dev_revalidate(ap, dev, 0);
+ if (rc) {
+ printk(KERN_ERR
+ "ata%u: failed to revalidate after set xfermode\n",
+ ap->id);
+ return rc;
}
DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
printk(KERN_INFO "ata%u: dev %u configured for %s\n",
ap->id, dev->devno,
ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
+ return 0;
}
static int ata_host_set_pio(struct ata_port *ap)
/* step 1: calculate xfer_mask */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
- unsigned int xfer_mask;
+ unsigned int pio_mask, dma_mask;
if (!ata_dev_present(dev))
continue;
- xfer_mask = ata_dev_xfermask(ap, dev);
+ ata_dev_xfermask(ap, dev);
+
+ /* TODO: let LLDD filter dev->*_mask here */
- dev->pio_mode = ata_xfer_mask2mode(xfer_mask & ATA_MASK_PIO);
- dev->dma_mode = ata_xfer_mask2mode(xfer_mask & (ATA_MASK_MWDMA |
- ATA_MASK_UDMA));
+ pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
+ dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+ dev->pio_mode = ata_xfer_mask2mode(pio_mask);
+ dev->dma_mode = ata_xfer_mask2mode(dma_mask);
}
/* step 2: always set host PIO timings */
ata_host_set_dma(ap);
/* step 4: update devices' xfer mode */
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ata_dev_set_mode(ap, &ap->device[i]);
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
- return;
+ if (!ata_dev_present(dev))
+ continue;
+
+ if (ata_dev_set_mode(ap, dev))
+ goto err_out;
+ }
if (ap->ops->post_set_mode)
ap->ops->post_set_mode(ap);
ap->ops->dev_select(ap, 0);
}
- /**
- * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
- * @ap: Port to reset and probe
- *
- * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
- * probe the bus. Not often used these days.
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- * Obtains host_set lock.
- *
- */
-
- static unsigned int ata_bus_edd(struct ata_port *ap)
- {
- struct ata_taskfile tf;
- unsigned long flags;
-
- /* set up execute-device-diag (bus reset) taskfile */
- /* also, take interrupts to a known state (disabled) */
- DPRINTK("execute-device-diag\n");
- ata_tf_init(ap, &tf, 0);
- tf.ctl |= ATA_NIEN;
- tf.command = ATA_CMD_EDD;
- tf.protocol = ATA_PROT_NODATA;
-
- /* do bus reset */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ata_tf_to_host(ap, &tf);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- /* spec says at least 2ms. but who knows with those
- * crazy ATAPI devices...
- */
- msleep(150);
-
- return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
- }
-
static unsigned int ata_bus_softreset(struct ata_port *ap,
unsigned int devmask)
{
*/
msleep(150);
-
- /* Before we perform post reset processing we want to see if
+
+ /* Before we perform post reset processing we want to see if
the bus shows 0xFF because the odd clown forgets the D7 pulldown
resistor */
-
+
if (ata_check_status(ap) == 0xFF)
return 1; /* Positive is failure for some reason */
struct ata_ioports *ioaddr = &ap->ioaddr;
unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
u8 err;
- unsigned int dev0, dev1 = 0, rc = 0, devmask = 0;
+ unsigned int dev0, dev1 = 0, devmask = 0;
DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
/* issue bus reset */
if (ap->flags & ATA_FLAG_SRST)
- rc = ata_bus_softreset(ap, devmask);
- else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) {
- /* set up device control */
- if (ap->flags & ATA_FLAG_MMIO)
- writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
- else
- outb(ap->ctl, ioaddr->ctl_addr);
- rc = ata_bus_edd(ap);
- }
-
- if (rc)
- goto err_out;
+ if (ata_bus_softreset(ap, devmask))
+ goto err_out;
/*
* determine by signature whether we have ATA or ATAPI devices
"SanDisk SDP3B-64", NULL,
"SANYO CD-ROM CRD", NULL,
"HITACHI CDR-8", NULL,
- "HITACHI CDR-8335", NULL,
+ "HITACHI CDR-8335", NULL,
"HITACHI CDR-8435", NULL,
- "Toshiba CD-ROM XM-6202B", NULL,
- "TOSHIBA CD-ROM XM-1702BC", NULL,
- "CD-532E-A", NULL,
- "E-IDE CD-ROM CR-840", NULL,
- "CD-ROM Drive/F5A", NULL,
- "WPI CDD-820", NULL,
+ "Toshiba CD-ROM XM-6202B", NULL,
+ "TOSHIBA CD-ROM XM-1702BC", NULL,
+ "CD-532E-A", NULL,
+ "E-IDE CD-ROM CR-840", NULL,
+ "CD-ROM Drive/F5A", NULL,
+ "WPI CDD-820", NULL,
"SAMSUNG CD-ROM SC-148C", NULL,
- "SAMSUNG CD-ROM SC", NULL,
+ "SAMSUNG CD-ROM SC", NULL,
"SanDisk SDP3B-64", NULL,
"ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
"_NEC DV5800A", NULL,
"SAMSUNG CD-ROM SN-124", "N001"
};
-
+
static int ata_strim(char *s, size_t len)
{
len = strnlen(s, len);
* @ap: Port on which the device to compute xfermask for resides
* @dev: Device to compute xfermask for
*
- * Compute supported xfermask of @dev. This function is
- * responsible for applying all known limits including host
- * controller limits, device blacklist, etc...
+ * Compute supported xfermask of @dev and store it in
+ * dev->*_mask. This function is responsible for applying all
+ * known limits including host controller limits, device
+ * blacklist, etc...
*
* LOCKING:
* None.
- *
- * RETURNS:
- * Computed xfermask.
*/
- static unsigned int ata_dev_xfermask(struct ata_port *ap,
- struct ata_device *dev)
+ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
{
unsigned long xfer_mask;
int i;
struct ata_device *d = &ap->device[i];
if (!ata_dev_present(d))
continue;
+ xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
+ d->udma_mask);
xfer_mask &= ata_id_xfermask(d->id);
if (ata_dma_blacklisted(d))
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
"disabling DMA\n", ap->id, dev->devno);
- return xfer_mask;
+ ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
+ &dev->udma_mask);
}
/**
*
* LOCKING:
* PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * 0 on success, AC_ERR_* mask otherwise.
*/
- static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev)
+ static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
+ struct ata_device *dev)
{
struct ata_taskfile tf;
+ unsigned int err_mask;
/* set up set-features taskfile */
DPRINTK("set features - xfer mode\n");
tf.protocol = ATA_PROT_NODATA;
tf.nsect = dev->xfer_mode;
- if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
- printk(KERN_ERR "ata%u: failed to set xfermode, disabled\n",
- ap->id);
- ata_port_disable(ap);
- }
+ err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
- DPRINTK("EXIT\n");
+ DPRINTK("EXIT, err_mask=%x\n", err_mask);
+ return err_mask;
}
/**
if (qc->flags & ATA_QCFLAG_SG) {
if (qc->n_elem)
- dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir);
+ dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
/* restore last sg */
sg[qc->orig_n_elem - 1].length += qc->pad_len;
if (pad_buf) {
}
} else {
if (qc->n_elem)
- dma_unmap_single(ap->host_set->dev,
+ dma_unmap_single(ap->dev,
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
dir);
/* restore sg */
goto skip_map;
}
- dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
+ dma_address = dma_map_single(ap->dev, qc->buf_virt,
sg->length, dir);
if (dma_mapping_error(dma_address)) {
/* restore sg */
}
dir = qc->dma_dir;
- n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
+ n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
if (n_elem < 1) {
/* restore last sg */
lsg->length += qc->pad_len;
unsigned long flags;
spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
ata_irq_on(ap);
ata_qc_complete(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
* None. (executing in kernel thread context)
*
* RETURNS:
- * Non-zero if qc completed, zero otherwise.
+ * Zero if qc completed.
+ * Non-zero if has next.
*/
static int ata_pio_complete (struct ata_port *ap)
* 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.
+ * HSM_ST_LAST_POLL state.
*/
drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
if (drv_stat & ATA_BUSY) {
if (drv_stat & ATA_BUSY) {
ap->hsm_task_state = HSM_ST_LAST_POLL;
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
- return 0;
+ return 1;
}
}
if (!ata_ok(drv_stat)) {
qc->err_mask |= __ac_err_mask(drv_stat);
ap->hsm_task_state = HSM_ST_ERR;
- return 0;
+ return 1;
}
ap->hsm_task_state = HSM_ST_IDLE;
/* another command may start at this point */
- return 1;
+ return 0;
}
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+ }
qc->cursect++;
qc->cursg_ofs++;
qc->cursg++;
qc->cursg_ofs = 0;
}
+}
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+/**
+ * ata_pio_sectors - Transfer one or many 512-byte sectors.
+ * @qc: Command on going
+ *
+ * Transfer one or many ATA_SECT_SIZE of data from/to the
+ * ATA device for the DRQ request.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+static void ata_pio_sectors(struct ata_queued_cmd *qc)
+{
+ if (is_multi_taskfile(&qc->tf)) {
+ /* READ/WRITE MULTIPLE */
+ unsigned int nsect;
- /* do the actual data transfer */
- do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
- ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
+ WARN_ON(qc->dev->multi_count == 0);
- kunmap(page);
+ nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
+ while (nsect--)
+ ata_pio_sector(qc);
+ } else
+ ata_pio_sector(qc);
+}
+
+/**
+ * atapi_send_cdb - Write CDB bytes to hardware
+ * @ap: Port to which ATAPI device is attached.
+ * @qc: Taskfile currently active
+ *
+ * When device has indicated its readiness to accept
+ * a CDB, this function is called. Send the CDB.
+ *
+ * LOCKING:
+ * caller.
+ */
+
+static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+ /* send SCSI cdb */
+ DPRINTK("send cdb\n");
+ WARN_ON(qc->dev->cdb_len < 12);
+
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+ ata_altstatus(ap); /* flush */
+
+ switch (qc->tf.protocol) {
+ case ATA_PROT_ATAPI:
+ ap->hsm_task_state = HSM_ST;
+ break;
+ case ATA_PROT_ATAPI_NODATA:
+ ap->hsm_task_state = HSM_ST_LAST;
+ break;
+ case ATA_PROT_ATAPI_DMA:
+ ap->hsm_task_state = HSM_ST_LAST;
+ /* initiate bmdma */
+ ap->ops->bmdma_start(qc);
+ break;
+ }
+}
+
+/**
+ * ata_pio_first_block - Write first data block to hardware
+ * @ap: Port to which ATA/ATAPI device is attached.
+ *
+ * When device has indicated its readiness to accept
+ * the data, this function sends out the CDB or
+ * the first data block by PIO.
+ * After this,
+ * - If polling, ata_pio_task() handles the rest.
+ * - Otherwise, interrupt handler takes over.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * Zero if irq handler takes over
+ * Non-zero if has next (polling).
+ */
+
+static int ata_pio_first_block(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ u8 status;
+ unsigned long flags;
+ int has_next;
+
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ WARN_ON(qc == NULL);
+ WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
+
+ /* if polling, we will stay in the work queue after sending the data.
+ * otherwise, interrupt handler takes over after sending the data.
+ */
+ has_next = (qc->tf.flags & ATA_TFLAG_POLLING);
+
+ /* sleep-wait for BSY to clear */
+ DPRINTK("busy wait\n");
+ if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) {
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ ap->hsm_task_state = HSM_ST_TMOUT;
+ goto err_out;
+ }
+
+ /* make sure DRQ is set */
+ status = ata_chk_status(ap);
+ if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+ /* device status error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto err_out;
+ }
+
+ /* Send the CDB (atapi) or the first data block (ata pio out).
+ * During the state transition, interrupt handler shouldn't
+ * be invoked before the data transfer is complete and
+ * hsm_task_state is changed. Hence, the following locking.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ if (qc->tf.protocol == ATA_PROT_PIO) {
+ /* PIO data out protocol.
+ * send first data block.
+ */
+
+ /* ata_pio_sectors() might change the state to HSM_ST_LAST.
+ * so, the state is changed here before ata_pio_sectors().
+ */
+ ap->hsm_task_state = HSM_ST;
+ ata_pio_sectors(qc);
+ ata_altstatus(ap); /* flush */
+ } else
+ /* send CDB */
+ atapi_send_cdb(ap, qc);
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ return has_next;
+
+err_out:
+ return 1; /* has next */
}
/**
/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ata_data_xfer(ap, buf + offset, count, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ata_data_xfer(ap, buf + offset, count, do_write);
+ }
bytes -= count;
qc->curbytes += count;
qc->cursg_ofs = 0;
}
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
-
- /* do the actual data transfer */
- ata_data_xfer(ap, buf, count, do_write);
-
- kunmap(page);
-
if (bytes)
goto next_sg;
}
if (do_write != i_write)
goto err_out;
+ VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
+
__atapi_pio_bytes(qc, bytes);
return;
return;
}
- ata_pio_sector(qc);
+ ata_pio_sectors(qc);
}
+
+ ata_altstatus(ap); /* flush */
}
static void ata_pio_error(struct ata_port *ap)
if (qc->tf.command != ATA_CMD_PACKET)
printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
- /* make sure qc->err_mask is available to
+ /* make sure qc->err_mask is available to
* know what's wrong and recover
*/
WARN_ON(qc->err_mask == 0);
{
struct ata_port *ap = _data;
unsigned long timeout;
- int qc_completed;
+ int has_next;
fsm_start:
timeout = 0;
- qc_completed = 0;
+ has_next = 1;
switch (ap->hsm_task_state) {
- case HSM_ST_IDLE:
- return;
+ case HSM_ST_FIRST:
+ has_next = ata_pio_first_block(ap);
+ break;
case HSM_ST:
ata_pio_block(ap);
break;
case HSM_ST_LAST:
- qc_completed = ata_pio_complete(ap);
+ has_next = ata_pio_complete(ap);
break;
case HSM_ST_POLL:
case HSM_ST_ERR:
ata_pio_error(ap);
return;
+
+ default:
+ BUG();
+ return;
}
if (timeout)
ata_port_queue_task(ap, ata_pio_task, ap, timeout);
- else if (!qc_completed)
+ else if (has_next)
goto fsm_start;
}
* finished. Hence, the following locking.
*/
spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
+#warning FIXME
+ /* ap->flags &= ~ATA_FLAG_NOINTR; */
ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
ap->ops->bmdma_start(qc); /* initiate bmdma */
printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
ap->id, qc->tf.command, drv_stat, host_stat);
+ ap->hsm_task_state = HSM_ST_IDLE;
+
/* complete taskfile transaction */
- qc->err_mask |= ac_err_mask(drv_stat);
+ qc->err_mask |= AC_ERR_TIMEOUT;
break;
}
{
struct ata_port *ap = qc->ap;
+ /* Use polling pio if the LLD doesn't handle
+ * interrupt driven pio and atapi CDB interrupt.
+ */
+ if (ap->flags & ATA_FLAG_PIO_POLLING) {
+ switch (qc->tf.protocol) {
+ case ATA_PROT_PIO:
+ case ATA_PROT_ATAPI:
+ case ATA_PROT_ATAPI_NODATA:
+ qc->tf.flags |= ATA_TFLAG_POLLING;
+ break;
+ case ATA_PROT_ATAPI_DMA:
+ if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
+ BUG();
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* select the device */
ata_dev_select(ap, qc->dev->devno, 1, 0);
+ /* start the command */
switch (qc->tf.protocol) {
case ATA_PROT_NODATA:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
ata_tf_to_host(ap, &qc->tf);
+ ap->hsm_task_state = HSM_ST_LAST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
+
break;
case ATA_PROT_DMA:
+ WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
+
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
ap->ops->bmdma_start(qc); /* initiate bmdma */
+ ap->hsm_task_state = HSM_ST_LAST;
break;
- case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST;
- ata_port_queue_task(ap, ata_pio_task, ap, 0);
- break;
+ case ATA_PROT_PIO:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
- case ATA_PROT_ATAPI:
- ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
- ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE) {
+ /* PIO data out protocol */
+ ap->hsm_task_state = HSM_ST_FIRST;
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
+
+ /* always send first data block using
+ * the ata_pio_task() codepath.
+ */
+ } else {
+ /* PIO data in protocol */
+ ap->hsm_task_state = HSM_ST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ }
+
break;
+ case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_NODATA:
- ap->flags |= ATA_FLAG_NOINTR;
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
ata_tf_to_host(ap, &qc->tf);
- ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
+ (qc->tf.flags & ATA_TFLAG_POLLING))
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
break;
case ATA_PROT_ATAPI_DMA:
- ap->flags |= ATA_FLAG_NOINTR;
+ WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
+
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
- ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
break;
default:
inline unsigned int ata_host_intr (struct ata_port *ap,
struct ata_queued_cmd *qc)
{
- u8 status, host_stat;
-
- switch (qc->tf.protocol) {
+ u8 status, host_stat = 0;
- case ATA_PROT_DMA:
- case ATA_PROT_ATAPI_DMA:
- case ATA_PROT_ATAPI:
- /* check status of DMA engine */
- host_stat = ap->ops->bmdma_status(ap);
- VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
+ VPRINTK("ata%u: protocol %d task_state %d\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state);
- /* if it's not our irq... */
- if (!(host_stat & ATA_DMA_INTR))
+ /* Check whether we are expecting interrupt in this state */
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
+ * The flag was turned on only for atapi devices.
+ * No need to check is_atapi_taskfile(&qc->tf) again.
+ */
+ if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
goto idle_irq;
+ break;
+ case HSM_ST_LAST:
+ if (qc->tf.protocol == ATA_PROT_DMA ||
+ qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
+ /* check status of DMA engine */
+ host_stat = ap->ops->bmdma_status(ap);
+ VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
+
+ /* if it's not our irq... */
+ if (!(host_stat & ATA_DMA_INTR))
+ goto idle_irq;
+
+ /* before we do anything else, clear DMA-Start bit */
+ ap->ops->bmdma_stop(qc);
+
+ if (unlikely(host_stat & ATA_DMA_ERR)) {
+ /* error when transfering data to/from memory */
+ qc->err_mask |= AC_ERR_HOST_BUS;
+ ap->hsm_task_state = HSM_ST_ERR;
+ }
+ }
+ break;
+ case HSM_ST:
+ break;
+ default:
+ goto idle_irq;
+ }
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
+ /* check altstatus */
+ status = ata_altstatus(ap);
+ if (status & ATA_BUSY)
+ goto idle_irq;
- /* fall through */
+ /* check main status, clearing INTRQ */
+ status = ata_chk_status(ap);
+ if (unlikely(status & ATA_BUSY))
+ goto idle_irq;
- case ATA_PROT_ATAPI_NODATA:
- case ATA_PROT_NODATA:
- /* check altstatus */
- status = ata_altstatus(ap);
- if (status & ATA_BUSY)
- goto idle_irq;
+ DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state, status);
- /* check main status, clearing INTRQ */
- status = ata_chk_status(ap);
- if (unlikely(status & ATA_BUSY))
- goto idle_irq;
- DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
- ap->id, qc->tf.protocol, status);
+ /* ack bmdma irq events */
+ ap->ops->irq_clear(ap);
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
+ /* check error */
+ if (unlikely(status & (ATA_ERR | ATA_DF))) {
+ qc->err_mask |= AC_ERR_DEV;
+ ap->hsm_task_state = HSM_ST_ERR;
+ }
+
+fsm_start:
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* Some pre-ATAPI-4 devices assert INTRQ
+ * at this state when ready to receive CDB.
+ */
+
+ /* check device status */
+ if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) {
+ /* Wrong status. Let EH handle this */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ atapi_send_cdb(ap, qc);
+
+ break;
+
+ case HSM_ST:
+ /* complete command or read/write the data register */
+ if (qc->tf.protocol == ATA_PROT_ATAPI) {
+ /* ATAPI PIO protocol */
+ if ((status & ATA_DRQ) == 0) {
+ /* no more data to transfer */
+ ap->hsm_task_state = HSM_ST_LAST;
+ goto fsm_start;
+ }
+
+ atapi_pio_bytes(qc);
+
+ if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
+ /* bad ireason reported by device */
+ goto fsm_start;
+
+ } else {
+ /* ATA PIO protocol */
+ if (unlikely((status & ATA_DRQ) == 0)) {
+ /* handle BSY=0, DRQ=0 as error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ ata_pio_sectors(qc);
+
+ if (ap->hsm_task_state == HSM_ST_LAST &&
+ (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
+ /* all data read */
+ ata_altstatus(ap);
+ status = ata_chk_status(ap);
+ goto fsm_start;
+ }
+ }
+
+ ata_altstatus(ap); /* flush */
+ break;
+
+ case HSM_ST_LAST:
+ if (unlikely(status & ATA_DRQ)) {
+ /* handle DRQ=1 as error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ /* no more data to transfer */
+ DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
+ ap->id, status);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
/* complete taskfile transaction */
qc->err_mask |= ac_err_mask(status);
ata_qc_complete(qc);
break;
+ case HSM_ST_ERR:
+ if (qc->tf.command != ATA_CMD_PACKET)
+ printk(KERN_ERR "ata%u: command error, drv_stat 0x%x host_stat 0x%x\n",
+ ap->id, status, host_stat);
+
+ /* make sure qc->err_mask is available to
+ * know what's wrong and recover
+ */
+ WARN_ON(qc->err_mask == 0);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
+ ata_qc_complete(qc);
+ break;
default:
goto idle_irq;
}
ap = host_set->ports[i];
if (ap &&
- !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
+ !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
+ if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
(qc->flags & ATA_QCFLAG_ACTIVE))
handled |= ata_host_intr(ap, qc);
}
* Flush the cache on the drive, if appropriate, then issue a
* standbynow command.
*/
- int ata_device_suspend(struct ata_port *ap, struct ata_device *dev)
+ int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
{
if (!ata_dev_present(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
ata_flush_cache(ap, dev);
- ata_standby_drive(ap, dev);
+ if (state.event != PM_EVENT_FREEZE)
+ ata_standby_drive(ap, dev);
ap->flags |= ATA_FLAG_SUSPENDED;
return 0;
}
int ata_port_start (struct ata_port *ap)
{
- struct device *dev = ap->host_set->dev;
+ struct device *dev = ap->dev;
int rc;
ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
void ata_port_stop (struct ata_port *ap)
{
- struct device *dev = ap->host_set->dev;
+ struct device *dev = ap->dev;
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
ata_pad_free(ap, dev);
ap->host = host;
ap->ctl = ATA_DEVCTL_OBS;
ap->host_set = host_set;
+ ap->dev = ent->dev;
ap->port_no = port_no;
ap->hard_port_no =
ent->legacy_mode ? ent->hard_port_no : port_no;
INIT_WORK(&ap->port_task, NULL, NULL);
INIT_LIST_HEAD(&ap->eh_done_q);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ap->device[i].devno = i;
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ dev->devno = i;
+ dev->pio_mask = UINT_MAX;
+ dev->mwdma_mask = UINT_MAX;
+ dev->udma_mask = UINT_MAX;
+ }
#ifdef ATA_IRQ_TRAP
ap->stats.unhandled_irq = 1;
int rc;
DPRINTK("ENTER\n");
+
+ if (!ent->port_ops->probe_reset &&
+ !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
+ printk(KERN_ERR "ata%u: no reset mechanism available\n",
+ port_no);
+ return NULL;
+ }
+
host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
if (!host)
return NULL;
* 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
+ * Unregister all objects associated with this host set. Free those
* objects.
*
* LOCKING:
EXPORT_SYMBOL_GPL(ata_std_probe_reset);
EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
EXPORT_SYMBOL_GPL(ata_dev_revalidate);
+ EXPORT_SYMBOL_GPL(ata_dev_classify);
+ EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_port_disable);
EXPORT_SYMBOL_GPL(ata_ratelimit);
EXPORT_SYMBOL_GPL(ata_busy_sleep);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
- EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_id_string);
EXPORT_SYMBOL_GPL(ata_id_c_string);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
projects / mirror_ubuntu-eoan-kernel.git / commitdiff