Separate out BMDMA irq handler from SFF irq handler. The misnamed
host_intr() functions are renamed to ata_sff_port_intr() and
ata_bmdma_port_intr().
All BMDMA drivers now use ata_bmdma_interrupt() or
ata_bmdma_port_intr() while all non-BMDMA SFF ones use
ata_sff_interrupt() or ata_sff_port_intr().
For now, ata_pci_sff_init_one() uses ata_bmdma_interrupt() as it's
used by both SFF and BMDMA drivers.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
drivers/ata/ata_piix.c | 2 +-
drivers/ata/libata-sff.c | 172 +++++++++++++++++++++++++++++--------------
drivers/ata/pata_cs5520.c | 2 +-
drivers/ata/pata_hpt3x3.c | 2 +-
drivers/ata/pata_icside.c | 2 +-
drivers/ata/pata_ninja32.c | 2 +-
drivers/ata/pata_pdc2027x.c | 2 +-
drivers/ata/pata_scc.c | 2 +-
drivers/ata/pata_sil680.c | 2 +-
drivers/ata/sata_mv.c | 2 +-
drivers/ata/sata_nv.c | 4 +-
drivers/ata/sata_qstor.c | 2 +-
drivers/ata/sata_sis.c | 2 +-
drivers/ata/sata_svw.c | 2 +-
drivers/ata/sata_uli.c | 2 +-
drivers/ata/sata_via.c | 2 +-
drivers/ata/sata_vsc.c | 2 +-
include/linux/libata.h | 5 +-
18 files changed, 138 insertions(+), 73 deletions(-)
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index e9e32ed..c1da5e6 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1471,7 +1471,7 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
}
pci_set_master(pdev);
- return ata_pci_sff_activate_host(host, ata_sff_interrupt, &piix_sht);
+ return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, &piix_sht);
}
static int __init piix_init(void)
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 96d93ce..4655181 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1328,14 +1328,28 @@ bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc)
return true;
}
+static unsigned int ata_sff_idle_irq(struct ata_port *ap)
+{
+ ap->stats.idle_irq++;
+
+#ifdef ATA_IRQ_TRAP
+ if ((ap->stats.idle_irq % 1000) == 0) {
+ ap->ops->sff_check_status(ap);
+ if (ap->ops->sff_irq_clear)
+ ap->ops->sff_irq_clear(ap);
+ ata_port_printk(ap, KERN_WARNING, "irq trap\n");
+ return 1;
+ }
+#endif
+ return 0; /* irq not handled */
+}
+
/**
- * ata_sff_host_intr - Handle host interrupt for given (port, task)
+ * ata_sff_port_intr - Handle SFF port interrupt
* @ap: Port on which interrupt arrived (possibly...)
* @qc: Taskfile currently active in engine
*
- * Handle host interrupt for given queued command. Currently,
- * only DMA interrupts are handled. All other commands are
- * handled via polling with interrupts disabled (nIEN bit).
+ * Handle port interrupt for given queued command.
*
* LOCKING:
* spin_lock_irqsave(host lock)
@@ -1343,11 +1357,10 @@ bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc)
* RETURNS:
* One if interrupt was handled, zero if not (shared irq).
*/
-inline unsigned int ata_sff_host_intr(struct ata_port *ap,
+inline unsigned int ata_sff_port_intr(struct ata_port *ap,
struct ata_queued_cmd *qc)
{
- struct ata_eh_info *ehi = &ap->link.eh_info;
- u8 status, host_stat = 0;
+ u8 status;
VPRINTK("ata%u: protocol %d task_state %d\n",
ap->print_id, qc->tf.protocol, ap->hsm_task_state);
@@ -1364,41 +1377,20 @@ inline unsigned int ata_sff_host_intr(struct ata_port *ap,
* need to check ata_is_atapi(qc->tf.protocol) 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 == ATAPI_PROT_DMA) {
- /* check status of DMA engine */
- host_stat = ap->ops->bmdma_status(ap);
- VPRINTK("ata%u: host_stat 0x%X\n",
- ap->print_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;
- }
- }
+ return ata_sff_idle_irq(ap);
break;
case HSM_ST:
+ case HSM_ST_LAST:
break;
default:
- goto idle_irq;
+ return ata_sff_idle_irq(ap);
}
/* check main status, clearing INTRQ if needed */
status = ata_sff_irq_status(ap);
if (status & ATA_BUSY)
- goto idle_irq;
+ return ata_sff_idle_irq(ap);
/* clear irq events */
if (ap->ops->sff_irq_clear)
@@ -1406,34 +1398,16 @@ inline unsigned int ata_sff_host_intr(struct ata_port *ap,
ata_sff_hsm_move(ap, qc, status, 0);
- if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
- qc->tf.protocol == ATAPI_PROT_DMA))
- ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
-
return 1; /* irq handled */
-
-idle_irq:
- ap->stats.idle_irq++;
-
-#ifdef ATA_IRQ_TRAP
- if ((ap->stats.idle_irq % 1000) == 0) {
- ap->ops->sff_check_status(ap);
- if (ap->ops->sff_irq_clear)
- ap->ops->sff_irq_clear(ap);
- ata_port_printk(ap, KERN_WARNING, "irq trap\n");
- return 1;
- }
-#endif
- return 0; /* irq not handled */
}
/**
- * ata_sff_interrupt - Default ATA host interrupt handler
+ * ata_sff_interrupt - Default SFF ATA host interrupt handler
* @irq: irq line (unused)
* @dev_instance: pointer to our ata_host information structure
*
* Default interrupt handler for PCI IDE devices. Calls
- * ata_sff_host_intr() for each port that is not disabled.
+ * ata_sff_port_intr() for each port that is not disabled.
*
* LOCKING:
* Obtains host lock during operation.
@@ -1457,7 +1431,7 @@ irqreturn_t ata_sff_interrupt(int irq, void *dev_instance)
qc = ata_qc_from_tag(ap, ap->link.active_tag);
if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
- handled |= ata_sff_host_intr(ap, qc);
+ handled |= ata_sff_port_intr(ap, qc);
}
spin_unlock_irqrestore(&host->lock, flags);
@@ -2205,7 +2179,7 @@ int ata_pci_sff_init_one(struct pci_dev *pdev,
host->private_data = host_priv;
pci_set_master(pdev);
- rc = ata_pci_sff_activate_host(host, ata_sff_interrupt, sht);
+ rc = ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
out:
if (rc == 0)
devres_remove_group(&pdev->dev, NULL);
@@ -2528,6 +2502,92 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
}
/**
+ * ata_bmdma_port_intr - Handle BMDMA port interrupt
+ * @ap: Port on which interrupt arrived (possibly...)
+ * @qc: Taskfile currently active in engine
+ *
+ * Handle port interrupt for given queued command.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * One if interrupt was handled, zero if not (shared irq).
+ */
+inline unsigned int ata_bmdma_port_intr(struct ata_port *ap,
+ struct ata_queued_cmd *qc)
+{
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ u8 host_stat = 0;
+ unsigned int handled;
+
+ if (ap->hsm_task_state == HSM_ST_LAST && ata_is_dma(qc->tf.protocol)) {
+ /* check status of DMA engine */
+ host_stat = ap->ops->bmdma_status(ap);
+ VPRINTK("ata%u: host_stat 0x%X\n",
+ ap->print_id, host_stat);
+
+ /* if it's not our irq... */
+ if (!(host_stat & ATA_DMA_INTR))
+ return ata_sff_idle_irq(ap);
+
+ /* 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;
+ }
+ }
+
+ handled = ata_sff_port_intr(ap, qc);
+
+ if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
+ ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
+
+ return handled;
+}
+
+/**
+ * ata_bmdma_interrupt - Default BMDMA ATA host interrupt handler
+ * @irq: irq line (unused)
+ * @dev_instance: pointer to our ata_host information structure
+ *
+ * Default interrupt handler for PCI IDE devices. Calls
+ * ata_bmdma_port_intr() for each port that is not disabled.
+ *
+ * LOCKING:
+ * Obtains host lock during operation.
+ *
+ * RETURNS:
+ * IRQ_NONE or IRQ_HANDLED.
+ */
+irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance)
+{
+ struct ata_host *host = dev_instance;
+ unsigned int i;
+ unsigned int handled = 0;
+ unsigned long flags;
+
+ /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
+ spin_lock_irqsave(&host->lock, flags);
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+ struct ata_queued_cmd *qc;
+
+ qc = ata_qc_from_tag(ap, ap->link.active_tag);
+ if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
+ handled |= ata_bmdma_port_intr(ap, qc);
+ }
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return IRQ_RETVAL(handled);
+}
+
+/**
* ata_bmdma_error_handler - Stock error handler for BMDMA controller
* @ap: port to handle error for
*
@@ -2928,7 +2988,7 @@ EXPORT_SYMBOL_GPL(ata_sff_irq_on);
EXPORT_SYMBOL_GPL(ata_sff_hsm_move);
EXPORT_SYMBOL_GPL(ata_sff_qc_issue);
EXPORT_SYMBOL_GPL(ata_sff_qc_fill_rtf);
-EXPORT_SYMBOL_GPL(ata_sff_host_intr);
+EXPORT_SYMBOL_GPL(ata_sff_port_intr);
EXPORT_SYMBOL_GPL(ata_sff_interrupt);
EXPORT_SYMBOL_GPL(ata_sff_freeze);
EXPORT_SYMBOL_GPL(ata_sff_thaw);
@@ -2950,6 +3010,8 @@ EXPORT_SYMBOL_GPL(ata_bmdma_port_ops);
EXPORT_SYMBOL_GPL(ata_bmdma_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_qc_issue);
EXPORT_SYMBOL_GPL(ata_bmdma_dumb_qc_prep);
+EXPORT_SYMBOL_GPL(ata_bmdma_port_intr);
+EXPORT_SYMBOL_GPL(ata_bmdma_interrupt);
EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index d5fe2b1..8cd06e4 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -258,7 +258,7 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
continue;
rc = devm_request_irq(&pdev->dev, irq[ap->port_no],
- ata_sff_interrupt, 0, DRV_NAME, host);
+ ata_bmdma_interrupt, 0, DRV_NAME, host);
if (rc)
return rc;
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index f11a320..8ac65cb 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -209,7 +209,7 @@ static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
}
pci_set_master(pdev);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &hpt3x3_sht);
}
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index 6ab3ada..4cbef74 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -482,7 +482,7 @@ static int __devinit pata_icside_add_ports(struct pata_icside_info *info)
pata_icside_setup_ioaddr(ap, info->base, info, info->port[i]);
}
- return ata_host_activate(host, ec->irq, ata_sff_interrupt, 0,
+ return ata_host_activate(host, ec->irq, ata_bmdma_interrupt, 0,
&pata_icside_sht);
}
diff --git a/drivers/ata/pata_ninja32.c b/drivers/ata/pata_ninja32.c
index 565e67c..8f6b64d 100644
--- a/drivers/ata/pata_ninja32.c
+++ b/drivers/ata/pata_ninja32.c
@@ -142,7 +142,7 @@ static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id)
iowrite8(0xa4, base + 0x1c); /* Unknown */
iowrite8(0x83, base + 0x1d); /* BMDMA control: WAIT0 */
/* FIXME: Should we disable them at remove ? */
- return ata_host_activate(host, dev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, dev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &ninja32_sht);
}
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index dfecd1a..76727aa 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -759,7 +759,7 @@ static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_de
return -EIO;
pci_set_master(pdev);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &pdc2027x_sht);
}
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 0ffe330..7a5b49c 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -1145,7 +1145,7 @@ static int scc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
return rc;
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &scc_sht);
}
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index a598bb3..9fffab2 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -355,7 +355,7 @@ static int __devinit sil680_init_one(struct pci_dev *pdev,
ata_sff_std_ports(&host->ports[1]->ioaddr);
/* Register & activate */
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &sil680_sht);
use_ioports:
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 20e926c..d9cfbf4 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2074,7 +2074,7 @@ static void mv_port_intr(struct ata_port *ap, u32 port_cause)
} else if (!edma_was_enabled) {
struct ata_queued_cmd *qc = mv_get_active_qc(ap);
if (qc)
- ata_sff_host_intr(ap, qc);
+ ata_sff_port_intr(ap, qc);
else
mv_unexpected_intr(ap, edma_was_enabled);
}
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 6f02be2..0806f65 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -866,7 +866,7 @@ static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
}
/* handle interrupt */
- return ata_sff_host_intr(ap, qc);
+ return ata_bmdma_port_intr(ap, qc);
}
static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
@@ -1450,7 +1450,7 @@ static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance)
qc = ata_qc_from_tag(ap, ap->link.active_tag);
if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
- handled += ata_sff_host_intr(ap, qc);
+ handled += ata_bmdma_port_intr(ap, qc);
else
// No request pending? Clear interrupt status
// anyway, in case there's one pending.
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index b8783bc..44ff556 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -452,7 +452,7 @@ static inline unsigned int qs_intr_mmio(struct ata_host *host)
if (!pp || pp->state != qs_state_mmio)
continue;
if (!(qc->tf.flags & ATA_TFLAG_POLLING))
- handled |= ata_sff_host_intr(ap, qc);
+ handled |= ata_sff_port_intr(ap, qc);
}
return handled;
}
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 9c43b4e..6104df7 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -333,7 +333,7 @@ static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
pci_intx(pdev, 1);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &sis_sht);
}
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 43e0024..b1049bd 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -502,7 +502,7 @@ static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *en
writel(0x0, mmio_base + K2_SATA_SIM_OFFSET);
pci_set_master(pdev);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &k2_sata_sht);
}
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index 4801689..5753e89 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -241,7 +241,7 @@ static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
pci_intx(pdev, 1);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &uli_sht);
}
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 282de39..7ebc406 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -448,7 +448,7 @@ static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
svia_configure(pdev);
pci_set_master(pdev);
- return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &svia_sht);
}
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 45bd21c..a0cba98 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -245,7 +245,7 @@ static void vsc_port_intr(u8 port_status, struct ata_port *ap)
qc = ata_qc_from_tag(ap, ap->link.active_tag);
if (qc && likely(!(qc->tf.flags & ATA_TFLAG_POLLING)))
- handled = ata_sff_host_intr(ap, qc);
+ handled = ata_bmdma_port_intr(ap, qc);
/* We received an interrupt during a polled command,
* or some other spurious condition. Interrupt reporting
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5c06e5f..8cc0a9b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1505,7 +1505,7 @@ extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
u8 status, int in_wq);
extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
-extern unsigned int ata_sff_host_intr(struct ata_port *ap,
+extern unsigned int ata_sff_port_intr(struct ata_port *ap,
struct ata_queued_cmd *qc);
extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
extern void ata_sff_freeze(struct ata_port *ap);
@@ -1539,6 +1539,9 @@ extern void ata_bus_reset(struct ata_port *ap); /* deprecated */
extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
+extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
+ struct ata_queued_cmd *qc);
+extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
extern void ata_bmdma_error_handler(struct ata_port *ap);
extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
extern void ata_bmdma_irq_clear(struct ata_port *ap);
--
1.5.4.5
--
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