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linux-davinci-2.6.23
Commit 256414de authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev 

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [PATCH] sata_mv: three bug fixes
  [PATCH] libata: ata_dev_init_params() fixes
  [PATCH] libata: Fix interesting use of "extern" and also some bracketing
  [PATCH] libata: Simplex and other mode filtering logic
  [PATCH] libata - ATA is both ATA and CFA
  [PATCH] libata: Add ->set_mode hook for odd drivers
  [PATCH] libata: BMDMA handling updates
  [PATCH] libata: kill trailing whitespace
  [PATCH] libata: add FIXME above ata_dev_xfermask()
  [PATCH] libata: cosmetic changes in ata_bus_softreset()
  [PATCH] libata: kill E.D.D.
parents 63e8d911 55d8ca4f
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Showing with 164 additions and 129 deletions
Documentation/DocBook/libata.tmpl
View file @ 256414de
......@@ -120,14 +120,27 @@ void (*dev_config) (struct ata_port *, struct ata_device *);
<programlisting>
void (*set_piomode) (struct ata_port *, struct ata_device *);
void (*set_dmamode) (struct ata_port *, struct ata_device *);
void (*post_set_mode) (struct ata_port *ap);
void (*post_set_mode) (struct ata_port *);
unsigned int (*mode_filter) (struct ata_port *, struct ata_device *, unsigned int);
</programlisting>
<para>
Hooks called prior to the issue of SET FEATURES - XFER MODE
command. dev->pio_mode is guaranteed to be valid when
->set_piomode() is called, and dev->dma_mode is guaranteed to be
valid when ->set_dmamode() is called. ->post_set_mode() is
command. The optional ->mode_filter() hook is called when libata
has built a mask of the possible modes. This is passed to the
->mode_filter() function which should return a mask of valid modes
after filtering those unsuitable due to hardware limits. It is not
valid to use this interface to add modes.
</para>
<para>
dev->pio_mode and dev->dma_mode are guaranteed to be valid when
->set_piomode() and when ->set_dmamode() is called. The timings for
any other drive sharing the cable will also be valid at this point.
That is the library records the decisions for the modes of each
drive on a channel before it attempts to set any of them.
</para>
<para>
->post_set_mode() is
called unconditionally, after the SET FEATURES - XFER MODE
command completes successfully.
</para>
......@@ -230,6 +243,32 @@ void (*dev_select)(struct ata_port *ap, unsigned int device);
</sect2>
<sect2><title>Private tuning method</title>
<programlisting>
void (*set_mode) (struct ata_port *ap);
</programlisting>
<para>
By default libata performs drive and controller tuning in
accordance with the ATA timing rules and also applies blacklists
and cable limits. Some controllers need special handling and have
custom tuning rules, typically raid controllers that use ATA
commands but do not actually do drive timing.
</para>
<warning>
<para>
This hook should not be used to replace the standard controller
tuning logic when a controller has quirks. Replacing the default
tuning logic in that case would bypass handling for drive and
bridge quirks that may be important to data reliability. If a
controller needs to filter the mode selection it should use the
mode_filter hook instead.
</para>
</warning>
</sect2>
<sect2><title>Reset ATA bus</title>
<programlisting>
void (*phy_reset) (struct ata_port *ap);
......
drivers/scsi/libata-bmdma.c
View file @ 256414de
......@@ -703,6 +703,7 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int
struct ata_probe_ent *probe_ent =
ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
int p = 0;
unsigned long bmdma;
if (!probe_ent)
return NULL;
......@@ -716,7 +717,12 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int
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);
bmdma = pci_resource_start(pdev, 4);
if (bmdma) {
if (inb(bmdma + 2) & 0x80)
probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
probe_ent->port[p].bmdma_addr = bmdma;
}
ata_std_ports(&probe_ent->port[p]);
p++;
}
......@@ -726,7 +732,13 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int
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;
bmdma = pci_resource_start(pdev, 4);
if (bmdma) {
bmdma += 8;
if(inb(bmdma + 2) & 0x80)
probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
probe_ent->port[p].bmdma_addr = bmdma;
}
ata_std_ports(&probe_ent->port[p]);
p++;
}
......@@ -740,6 +752,7 @@ 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;
unsigned long bmdma;
probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port);
if (!probe_ent)
......@@ -766,8 +779,13 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
break;
}
probe_ent->port[0].bmdma_addr =
pci_resource_start(pdev, 4) + 8 * port_num;
bmdma = pci_resource_start(pdev, 4);
if (bmdma != 0) {
bmdma += 8 * port_num;
probe_ent->port[0].bmdma_addr = bmdma;
if (inb(bmdma + 2) & 0x80)
probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
}
ata_std_ports(&probe_ent->port[0]);
return probe_ent;
......
drivers/scsi/libata-core.c
View file @ 256414de
......@@ -62,7 +62,9 @@
#include "libata.h"
static unsigned int ata_dev_init_params(struct ata_port *ap,
struct ata_device *dev);
struct ata_device *dev,
u16 heads,
u16 sectors);
static void ata_set_mode(struct ata_port *ap);
static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
struct ata_device *dev);
......@@ -1081,9 +1083,8 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev)
*
* 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)
......@@ -1095,7 +1096,6 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
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;
......@@ -1104,12 +1104,6 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
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);
......@@ -1139,39 +1133,16 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
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;
}
swap_buf_le16(id, ATA_ID_WORDS);
/* sanity check */
if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) {
if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
rc = -EINVAL;
reason = "device reports illegal type";
goto err_out;
......@@ -1187,7 +1158,7 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
* Some drives were very specific about that exact sequence.
*/
if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
err_mask = ata_dev_init_params(ap, dev);
err_mask = ata_dev_init_params(ap, dev, id[3], id[6]);
if (err_mask) {
rc = -EIO;
reason = "INIT_DEV_PARAMS failed";
......@@ -1440,7 +1411,11 @@ static int ata_bus_probe(struct ata_port *ap)
if (!found)
goto err_out_disable;
if (ap->ops->set_mode)
ap->ops->set_mode(ap);
else
ata_set_mode(ap);
if (ap->flags & ATA_FLAG_PORT_DISABLED)
goto err_out_disable;
......@@ -1845,7 +1820,7 @@ static void ata_host_set_dma(struct ata_port *ap)
*/
static void ata_set_mode(struct ata_port *ap)
{
int i, rc;
int i, rc, used_dma = 0;
/* step 1: calculate xfer_mask */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
......@@ -1863,6 +1838,9 @@ static void ata_set_mode(struct ata_port *ap)
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);
if (dev->dma_mode)
used_dma = 1;
}
/* step 2: always set host PIO timings */
......@@ -1884,6 +1862,17 @@ static void ata_set_mode(struct ata_port *ap)
goto err_out;
}
/*
* Record simplex status. If we selected DMA then the other
* host channels are not permitted to do so.
*/
if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
ap->host_set->simplex_claimed = 1;
/*
* Chip specific finalisation
*/
if (ap->ops->post_set_mode)
ap->ops->post_set_mode(ap);
......@@ -2005,45 +1994,6 @@ static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
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)
{
......@@ -2078,13 +2028,12 @@ static unsigned int ata_bus_softreset(struct ata_port *ap,
*/
msleep(150);
/* Before we perform post reset processing we want to see if
the bus shows 0xFF because the odd clown forgets the D7 pulldown
resistor */
* 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 */
return AC_ERR_OTHER;
ata_bus_post_reset(ap, devmask);
......@@ -2116,7 +2065,7 @@ void ata_bus_reset(struct ata_port *ap)
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);
......@@ -2139,17 +2088,7 @@ void ata_bus_reset(struct ata_port *ap)
/* 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)
if (ata_bus_softreset(ap, devmask))
goto err_out;
/*
......@@ -2223,9 +2162,9 @@ static int sata_phy_resume(struct ata_port *ap)
* so makes reset sequence different from the original
* ->phy_reset implementation and Jeff nervous. :-P
*/
extern void ata_std_probeinit(struct ata_port *ap)
void ata_std_probeinit(struct ata_port *ap)
{
if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) {
if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) {
sata_phy_resume(ap);
if (sata_dev_present(ap))
ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
......@@ -2714,18 +2653,23 @@ static int ata_dma_blacklisted(const struct ata_device *dev)
* known limits including host controller limits, device
* blacklist, etc...
*
* FIXME: The current implementation limits all transfer modes to
* the fastest of the lowested device on the port. This is not
* required on most controllers.
*
* LOCKING:
* None.
*/
static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
{
struct ata_host_set *hs = ap->host_set;
unsigned long xfer_mask;
int i;
xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
ap->udma_mask);
/* use port-wide xfermask for now */
/* FIXME: Use port-wide xfermask for now */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *d = &ap->device[i];
if (!ata_dev_present(d))
......@@ -2735,12 +2679,23 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
xfer_mask &= ata_id_xfermask(d->id);
if (ata_dma_blacklisted(d))
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
/* Apply cable rule here. Don't apply it early because when
we handle hot plug the cable type can itself change */
if (ap->cbl == ATA_CBL_PATA40)
xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
}
if (ata_dma_blacklisted(dev))
printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
"disabling DMA\n", ap->id, dev->devno);
if (hs->flags & ATA_HOST_SIMPLEX) {
if (hs->simplex_claimed)
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
}
if (ap->ops->mode_filter)
xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
&dev->udma_mask);
}
......@@ -2795,16 +2750,16 @@ static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
*/
static unsigned int ata_dev_init_params(struct ata_port *ap,
struct ata_device *dev)
struct ata_device *dev,
u16 heads,
u16 sectors)
{
struct ata_taskfile tf;
unsigned int err_mask;
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 0;
return AC_ERR_INVALID;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
......@@ -4536,6 +4491,14 @@ static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
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;
......@@ -4596,6 +4559,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
host_set->mmio_base = ent->mmio_base;
host_set->private_data = ent->private_data;
host_set->ops = ent->port_ops;
host_set->flags = ent->host_set_flags;
/* register each port bound to this device */
for (i = 0; i < ent->n_ports; i++) {
......
drivers/scsi/sata_mv.c
View file @ 256414de
......@@ -1010,7 +1010,7 @@ static void mv_fill_sg(struct ata_queued_cmd *qc)
pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff);
pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
pp->sg_tbl[i].flags_size = cpu_to_le32(len);
pp->sg_tbl[i].flags_size = cpu_to_le32(len & 0xffff);
sg_len -= len;
addr += len;
......@@ -1350,7 +1350,6 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
{
void __iomem *mmio = host_set->mmio_base;
void __iomem *hc_mmio = mv_hc_base(mmio, hc);
struct ata_port *ap;
struct ata_queued_cmd *qc;
u32 hc_irq_cause;
int shift, port, port0, hard_port, handled;
......@@ -1373,25 +1372,32 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
u8 ata_status = 0;
ap = host_set->ports[port];
struct ata_port *ap = host_set->ports[port];
struct mv_port_priv *pp = ap->private_data;
hard_port = port & MV_PORT_MASK; /* range 0-3 */
handled = 0; /* ensure ata_status is set if handled++ */
if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
/* new CRPB on the queue; just one at a time until NCQ
/* Note that DEV_IRQ might happen spuriously during EDMA,
* and should be ignored in such cases. We could mask it,
* but it's pretty rare and may not be worth the overhead.
*/
if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
/* EDMA: check for response queue interrupt */
if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
ata_status = mv_get_crpb_status(ap);
handled++;
} else if ((DEV_IRQ << hard_port) & hc_irq_cause) {
/* received ATA IRQ; read the status reg to clear INTRQ
*/
handled = 1;
}
} else {
/* PIO: check for device (drive) interrupt */
if ((DEV_IRQ << hard_port) & hc_irq_cause) {
ata_status = readb((void __iomem *)
ap->ioaddr.status_addr);
handled++;
handled = 1;
}
}
if (ap &&
(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)))
if (ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))
continue;
err_mask = ac_err_mask(ata_status);
......@@ -1403,12 +1409,12 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
if ((PORT0_ERR << shift) & relevant) {
mv_err_intr(ap);
err_mask |= AC_ERR_OTHER;
handled++;
handled = 1;
}
if (handled && ap) {
if (handled) {
qc = ata_qc_from_tag(ap, ap->active_tag);
if (NULL != qc) {
if (qc && (qc->flags & ATA_QCFLAG_ACTIVE)) {
VPRINTK("port %u IRQ found for qc, "
"ata_status 0x%x\n", port,ata_status);
/* mark qc status appropriately */
......
include/linux/libata.h
View file @ 256414de
......@@ -160,8 +160,10 @@ enum {
ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
ATA_QCFLAG_EH_SCHEDULED = (1 << 5), /* EH scheduled */
/* host set flags */
ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
/* various lengths of time */
ATA_TMOUT_EDD = 5 * HZ, /* heuristic */
ATA_TMOUT_PIO = 30 * HZ,
ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
......@@ -279,6 +281,7 @@ struct ata_probe_ent {
unsigned long irq;
unsigned int irq_flags;
unsigned long host_flags;
unsigned long host_set_flags;
void __iomem *mmio_base;
void *private_data;
};
......@@ -291,6 +294,9 @@ struct ata_host_set {
unsigned int n_ports;
void *private_data;
const struct ata_port_operations *ops;
unsigned long flags;
int simplex_claimed; /* Keep seperate in case we
ever need to do this locked */
struct ata_port * ports[0];
};
......@@ -420,6 +426,7 @@ struct ata_port_operations {
void (*set_piomode) (struct ata_port *, struct ata_device *);
void (*set_dmamode) (struct ata_port *, struct ata_device *);
unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
......@@ -430,6 +437,7 @@ struct ata_port_operations {
void (*dev_select)(struct ata_port *ap, unsigned int device);
void (*phy_reset) (struct ata_port *ap); /* obsolete */
void (*set_mode) (struct ata_port *ap);
int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
void (*post_set_mode) (struct ata_port *ap);
......
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