libata: improve initialization and legacy handling, take#2

index 351544d..b5af446 100644
@@ -5218,7 +5218,7 @@ void ata_dev_init(struct ata_device *dev
 }
 
 /**
- *	ata_host_init - Initialize an ata_port structure
+ *	ata_port_init - Initialize an ata_port structure
  *	@ap: Structure to initialize
  *	@host: associated SCSI mid-layer structure
  *	@host_set: Collection of hosts to which @ap belongs

@@ -5231,7 +5231,7 @@ void ata_dev_init(struct ata_device *dev
  *	LOCKING:
  *	Inherited from caller.
  */
-static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
+static void ata_port_init(struct ata_port *ap, struct Scsi_Host *host,
 			  struct ata_host_set *host_set,
 			  const struct ata_probe_ent *ent, unsigned int port_no)
 {

@@ -5298,7 +5298,7 @@ #endif
 }
 
 /**
- *	ata_host_add - Attach low-level ATA driver to system
+ *	ata_port_add - Attach low-level ATA driver to system
  *	@ent: Information provided by low-level driver
  *	@host_set: Collections of ports to which we add
  *	@port_no: Port number associated with this host

@@ -5312,7 +5312,7 @@ #endif
  *	New ata_port on success, for NULL on error.
  */
 
-static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
+static struct ata_port * ata_port_add(const struct ata_probe_ent *ent,
 				      struct ata_host_set *host_set,
 				      unsigned int port_no)
 {

@@ -5337,7 +5337,7 @@ static struct ata_port * ata_host_add(co
 
 	ap = ata_shost_to_port(host);
 
-	ata_host_init(ap, host, host_set, ent, port_no);
+	ata_port_init(ap, host, host_set, ent, port_no);
 
 	rc = ap->ops->port_start(ap);
 	if (rc)

@@ -5396,7 +5396,7 @@ int ata_device_add(const struct ata_prob
 		struct ata_port *ap;
 		unsigned long xfer_mode_mask;
 
-		ap = ata_host_add(ent, host_set, i);
+		ap = ata_port_add(ent, host_set, i);
 		if (!ap)
 			goto err_out;
 

index b5af446..1810bb2 100644
@@ -5370,7 +5370,7 @@ err_out:
  */
 int ata_device_add(const struct ata_probe_ent *ent)
 {
-	unsigned int count = 0, i;
+	unsigned int i;
 	struct device *dev = ent->dev;
 	struct ata_host_set *host_set;
 	int rc;

@@ -5392,7 +5392,7 @@ int ata_device_add(const struct ata_prob
 	host_set->flags = ent->host_set_flags;
 
 	/* register each port bound to this device */
-	for (i = 0; i < ent->n_ports; i++) {
+	for (i = 0; i < host_set->n_ports; i++) {
 		struct ata_port *ap;
 		unsigned long xfer_mode_mask;
 

@@ -5418,12 +5418,8 @@ int ata_device_add(const struct ata_prob
 		ata_chk_status(ap);
 		host_set->ops->irq_clear(ap);
 		ata_eh_freeze_port(ap);	/* freeze port before requesting IRQ */
-		count++;
 	}
 
-	if (!count)
-		goto err_free_ret;
-
 	/* obtain irq, that is shared between channels */
 	rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
 			 DRV_NAME, host_set);

@@ -5435,13 +5431,11 @@ int ata_device_add(const struct ata_prob
 
 	/* perform each probe synchronously */
 	DPRINTK("probe begin\n");
-	for (i = 0; i < count; i++) {
-		struct ata_port *ap;
+	for (i = 0; i < host_set->n_ports; i++) {
+		struct ata_port *ap = host_set->ports[i];
 		u32 scontrol;
 		int rc;
 
-		ap = host_set->ports[i];
-
 		/* init sata_spd_limit to the current value */
 		if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
 			int spd = (scontrol >> 4) & 0xf;

@@ -5497,7 +5491,7 @@ int ata_device_add(const struct ata_prob
 
 	/* probes are done, now scan each port's disk(s) */
 	DPRINTK("host probe begin\n");
-	for (i = 0; i < count; i++) {
+	for (i = 0; i < host_set->n_ports; i++) {
 		struct ata_port *ap = host_set->ports[i];
 
 		ata_scsi_scan_host(ap);

@@ -5509,14 +5503,14 @@ int ata_device_add(const struct ata_prob
 	return ent->n_ports; /* success */
 
 err_out:
-	for (i = 0; i < count; i++) {
+	for (i = 0; i < host_set->n_ports; i++) {
 		struct ata_port *ap = host_set->ports[i];
 		if (ap) {
 			ap->ops->port_stop(ap);
 			scsi_host_put(ap->host);
 		}
 	}
-err_free_ret:
+
 	kfree(host_set);
 	VPRINTK("EXIT, returning 0\n");
 	return 0;

index 1810bb2..7e1f3ee 100644
@@ -3040,10 +3040,6 @@ static int ata_dma_blacklisted(const str
  *	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.
  */

@@ -3054,6 +3050,7 @@ static void ata_dev_xfermask(struct ata_
 	unsigned long xfer_mask;
 	int i;
 
+	/* controller modes available */
 	xfer_mask = ata_pack_xfermask(ap->pio_mask,
 				      ap->mwdma_mask, ap->udma_mask);
 

@@ -3063,34 +3060,30 @@ static void ata_dev_xfermask(struct ata_
 	if (ap->cbl == ATA_CBL_PATA40)
 		xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
 
-	/* 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_absent(d))
-			continue;
-
-		if (ata_dev_disabled(d)) {
-			/* to avoid violating device selection timing */
-			xfer_mask &= ata_pack_xfermask(d->pio_mask,
-						       UINT_MAX, UINT_MAX);
-			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);
-	}
+	xfer_mask &= ata_pack_xfermask(dev->pio_mask,
+				       dev->mwdma_mask, dev->udma_mask);
+	xfer_mask &= ata_id_xfermask(dev->id);
 
-	if (ata_dma_blacklisted(dev))
+	if (ata_dma_blacklisted(dev)) {
+		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
 		ata_dev_printk(dev, KERN_WARNING,
 			       "device is on DMA blacklist, disabling DMA\n");
+	}
+
+	if ((hs->flags & ATA_HOST_SIMPLEX) && hs->simplex_claimed) {
+		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+		ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
+			       "other device, disabling DMA\n");
+	}
 
-	if (hs->flags & ATA_HOST_SIMPLEX) {
-		if (hs->simplex_claimed)
-			xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+	/* Use the lowest common PIO mode to avoid violating device
+	 * selection timing.
+	 */
+	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+		struct ata_device *d = &ap->device[i];
+		if (!ata_dev_absent(d))
+			xfer_mask &= ata_pack_xfermask(d->pio_mask,
+						       UINT_MAX, UINT_MAX);
 	}
 
 	if (ap->ops->mode_filter)

index 298e464..dfdf4a7 100644
@@ -932,8 +932,6 @@ static int piix_init_one (struct pci_dev
 
 static void piix_host_stop(struct ata_host_set *host_set)
 {
-	if (host_set->next == NULL)
-		kfree(host_set->private_data);
 	ata_host_stop(host_set);
 }
 

216 lines not on this page · raw message

115 lines not on this page · raw message

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..9202fd0
@@ -0,0 +1,12 @@
+#ifndef __ASM_GENERIC_LIBATA_PORTMAP_H
+#define __ASM_GENERIC_LIBATA_PORTMAP_H
+
+#define ATA_PRIMARY_CMD		0x1F0
+#define ATA_PRIMARY_CTL		0x3F6
+#define ATA_PRIMARY_IRQ		14
+
+#define ATA_SECONDARY_CMD	0x170
+#define ATA_SECONDARY_CTL	0x376
+#define ATA_SECONDARY_IRQ	15
+
+#endif

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

new file mode 100644
index 0000000..75484ef
@@ -0,0 +1 @@
+#include <asm-generic/libata-portmap.h>

index b941670..9a94778 100644
@@ -36,6 +36,8 @@ #include <linux/ata.h>
 #include <linux/workqueue.h>
 #include <scsi/scsi_host.h>
 
+#include <asm/libata-portmap.h>
+
 /*
  * compile-time options: to be removed as soon as all the drivers are
  * converted to the new debugging mechanism

@@ -356,6 +358,7 @@ struct ata_probe_ent {
 	unsigned int		udma_mask;
 	unsigned int		legacy_mode;
 	unsigned long		irq;
+	unsigned long		irq2;
 	unsigned int		irq_flags;
 	unsigned long		host_flags;
 	unsigned long		host_set_flags;

@@ -367,6 +370,7 @@ struct ata_host_set {
 	spinlock_t		lock;
 	struct device 		*dev;
 	unsigned long		irq;
+	unsigned long		irq2;
 	void __iomem		*mmio_base;
 	unsigned int		n_ports;
 	void			*private_data;

@@ -374,7 +378,6 @@ struct ata_host_set {
 	unsigned long		flags;
 	int			simplex_claimed;	/* Keep seperate in case we
 							   ever need to do this locked */
-	struct ata_host_set	*next;		/* for legacy mode */
 	struct ata_port		*ports[0];
 };
 

index 34343e5..d43dc9a 100644
@@ -905,7 +905,6 @@ static struct ata_probe_ent *ata_pci_ini
 		return NULL;
 
 	probe_ent->legacy_mode = 1;
-	probe_ent->n_ports = 1;
 	probe_ent->hard_port_no = 0;
 	probe_ent->private_data = port[0]->private_data;
 

@@ -933,7 +932,6 @@ static struct ata_probe_ent *ata_pci_ini
 		probe_ent->port[port_num].cmd_addr = ATA_SECONDARY_CMD;
 		probe_ent->port[port_num].altstatus_addr =
 		probe_ent->port[port_num].ctl_addr = ATA_SECONDARY_CTL;
-		port_num ++;
 		if (bmdma) {
 			probe_ent->port[port_num].bmdma_addr = bmdma + 8;
 			if (inb(bmdma + 10) & 0x80)

@@ -942,6 +940,9 @@ static struct ata_probe_ent *ata_pci_ini
 		ata_std_ports(&probe_ent->port[port_num]);
 		port_num ++;
 	}
+
+	probe_ent->n_ports = port_num;
+
 	return probe_ent;
 }
 

index 16134d5..01eae98 100644
@@ -5244,8 +5244,9 @@ static void ata_port_init(struct ata_por
 	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;
+	ap->hard_port_no = port_no;
+	if (ent->legacy_mode)
+		ap->hard_port_no += ent->hard_port_no;
 	ap->pio_mask = ent->pio_mask;
 	ap->mwdma_mask = ent->mwdma_mask;
 	ap->udma_mask = ent->udma_mask;

@@ -5404,16 +5405,15 @@ int ata_device_add(const struct ata_prob
 				(ap->mwdma_mask << ATA_SHIFT_MWDMA) |
 				(ap->pio_mask << ATA_SHIFT_PIO);
 
-		/* FIXME: maybe print both IRQ lines ? */
 		/* print per-port info to dmesg */
 		ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
-				"ctl 0x%lX bmdma 0x%lX irq %lu\n",
+				"ctl 0x%lX bmdma 0x%lX irq %d\n",
 				ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
 				ata_mode_string(xfer_mode_mask),
 				ap->ioaddr.cmd_addr,
 				ap->ioaddr.ctl_addr,
 				ap->ioaddr.bmdma_addr,
-				ent->irq);
+				irq_line);
 
 		ata_chk_status(ap);
 		host_set->ops->irq_clear(ap);

@@ -5440,7 +5440,7 @@ int ata_device_add(const struct ata_prob
 		if (rc) {
 			dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
 				   ent->irq2, rc);
-			goto err_out;
+			goto err_out_free_irq;
 		}
 	}
 

@@ -5517,6 +5517,8 @@ int ata_device_add(const struct ata_prob
 	VPRINTK("EXIT, returning %u\n", ent->n_ports);
 	return ent->n_ports; /* success */
 
+err_out_free_irq:
+	free_irq(ent->irq, host_set);
 err_out:
 	for (i = 0; i < host_set->n_ports; i++) {
 		struct ata_port *ap = host_set->ports[i];

index 01eae98..8818c84 100644
@@ -5312,7 +5312,6 @@ static struct ata_port * ata_port_add(co
 {
 	struct Scsi_Host *host;
 	struct ata_port *ap;
-	int rc;
 
 	DPRINTK("ENTER\n");
 

@@ -5333,15 +5332,7 @@ static struct ata_port * ata_port_add(co
 
 	ata_port_init(ap, host, host_set, ent, port_no);
 
-	rc = ap->ops->port_start(ap);
-	if (rc)
-		goto err_out;
-
 	return ap;
-
-err_out:
-	scsi_host_put(host);
-	return NULL;
 }
 
 /**

@@ -5396,11 +5387,27 @@ int ata_device_add(const struct ata_prob
 		if (!ap)
 			goto err_out;
 
+		host_set->ports[i] = ap;
+
+		/* dummy? */
+		if (ent->dummy_port_mask & (1 << i)) {
+			ata_port_printk(ap, KERN_INFO, "DUMMY\n");
+			ap->ops = &ata_dummy_port_ops;
+			continue;
+		}
+
+		/* start port */
+		rc = ap->ops->port_start(ap);
+		if (rc) {
+			host_set->ports[i] = NULL;
+			scsi_host_put(ap->host);
+			goto err_out;
+		}
+
 		/* Report the secondary IRQ for second channel legacy */
 		if (i == 1 && ent->irq2)
 			irq_line = ent->irq2;
 
-		host_set->ports[i] = ap;
 		xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
 				(ap->mwdma_mask << ATA_SHIFT_MWDMA) |
 				(ap->pio_mask << ATA_SHIFT_PIO);

@@ -5897,6 +5904,39 @@ u32 ata_wait_register(void __iomem *reg,
 }
 
 /*
+ * Dummy port_ops
+ */
+static void ata_dummy_noret(struct ata_port *ap)	{ }
+static int ata_dummy_ret0(struct ata_port *ap)		{ return 0; }
+static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
+
+static u8 ata_dummy_check_status(struct ata_port *ap)
+{
+	return ATA_DRDY;
+}
+
+static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
+{
+	return AC_ERR_SYSTEM;
+}
+
+const struct ata_port_operations ata_dummy_port_ops = {
+	.port_disable		= ata_port_disable,
+	.check_status		= ata_dummy_check_status,
+	.check_altstatus	= ata_dummy_check_status,
+	.dev_select		= ata_noop_dev_select,
+	.qc_prep		= ata_noop_qc_prep,
+	.qc_issue		= ata_dummy_qc_issue,
+	.freeze			= ata_dummy_noret,
+	.thaw			= ata_dummy_noret,
+	.error_handler		= ata_dummy_noret,
+	.post_internal_cmd	= ata_dummy_qc_noret,
+	.irq_clear		= ata_dummy_noret,
+	.port_start		= ata_dummy_ret0,
+	.port_stop		= ata_dummy_noret,
+};
+
+/*
  * libata is essentially a library of internal helper functions for
  * low-level ATA host controller drivers.  As such, the API/ABI is
  * likely to change as new drivers are added and updated.

@@ -5906,6 +5946,7 @@ u32 ata_wait_register(void __iomem *reg,
 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
+EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
 EXPORT_SYMBOL_GPL(ata_std_bios_param);
 EXPORT_SYMBOL_GPL(ata_std_ports);
 EXPORT_SYMBOL_GPL(ata_device_add);

index 9a94778..6a81aed 100644
@@ -353,6 +353,7 @@ struct ata_probe_ent {
 	struct ata_ioports	port[ATA_MAX_PORTS];
 	unsigned int		n_ports;
 	unsigned int		hard_port_no;
+	unsigned int		dummy_port_mask;
 	unsigned int		pio_mask;
 	unsigned int		mwdma_mask;
 	unsigned int		udma_mask;

@@ -652,6 +653,8 @@ extern const unsigned long sata_deb_timi
 extern const unsigned long sata_deb_timing_hotplug[];
 extern const unsigned long sata_deb_timing_long[];
 
+extern const struct ata_port_operations ata_dummy_port_ops;
+
 static inline const unsigned long *
 sata_ehc_deb_timing(struct ata_eh_context *ehc)
 {

@@ -661,6 +664,11 @@ sata_ehc_deb_timing(struct ata_eh_contex
 		return sata_deb_timing_normal;
 }
 
+static inline int ata_port_is_dummy(struct ata_port *ap)
+{
+	return ap->ops == &ata_dummy_port_ops;
+}
+
 extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
 extern void sata_phy_reset(struct ata_port *ap);

index d43dc9a..c4cd578 100644
@@ -898,50 +898,43 @@ static struct ata_probe_ent *ata_pci_ini
 	struct ata_probe_ent *probe_ent;
 	unsigned long bmdma = pci_resource_start(pdev, 4);
 
-	int port_num = 0;
-
 	probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
 	if (!probe_ent)
 		return NULL;
 
-	probe_ent->legacy_mode = 1;
-	probe_ent->hard_port_no = 0;
+	probe_ent->n_ports = 2;
 	probe_ent->private_data = port[0]->private_data;
 
 	if (port_mask & ATA_PORT_PRIMARY) {
 		probe_ent->irq = 14;
-		probe_ent->port[port_num].cmd_addr = ATA_PRIMARY_CMD;
-		probe_ent->port[port_num].altstatus_addr =
-		probe_ent->port[port_num].ctl_addr = ATA_PRIMARY_CTL;
+		probe_ent->port[0].cmd_addr = ATA_PRIMARY_CMD;
+		probe_ent->port[0].altstatus_addr =
+		probe_ent->port[0].ctl_addr = ATA_PRIMARY_CTL;
 		if (bmdma) {
 			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[port_num]);
-		port_num ++;
-	}
+		ata_std_ports(&probe_ent->port[0]);
+	} else
+		probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
+
 	if (port_mask & ATA_PORT_SECONDARY) {
-		if (port_num == 1)
+		if (probe_ent->irq)
 			probe_ent->irq2 = 15;
-		else {
-			/* Secondary only. IRQ 15 only and "first" port is port 1 */
+		else
 			probe_ent->irq = 15;
-			probe_ent->hard_port_no = 1;
-		}
-		probe_ent->port[port_num].cmd_addr = ATA_SECONDARY_CMD;
-		probe_ent->port[port_num].altstatus_addr =
-		probe_ent->port[port_num].ctl_addr = ATA_SECONDARY_CTL;
+		probe_ent->port[1].cmd_addr = ATA_SECONDARY_CMD;
+		probe_ent->port[1].altstatus_addr =
+		probe_ent->port[1].ctl_addr = ATA_SECONDARY_CTL;
 		if (bmdma) {
-			probe_ent->port[port_num].bmdma_addr = bmdma + 8;
+			probe_ent->port[1].bmdma_addr = bmdma + 8;
 			if (inb(bmdma + 10) & 0x80)
 				probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
 		}
-		ata_std_ports(&probe_ent->port[port_num]);
-		port_num ++;
-	}
-
-	probe_ent->n_ports = port_num;
+		ata_std_ports(&probe_ent->port[1]);
+	} else
+		probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
 
 	return probe_ent;
 }

index 8818c84..453dce0 100644
@@ -5245,8 +5245,6 @@ static void ata_port_init(struct ata_por
 	ap->dev = ent->dev;
 	ap->port_no = port_no;
 	ap->hard_port_no = port_no;
-	if (ent->legacy_mode)
-		ap->hard_port_no += ent->hard_port_no;
 	ap->pio_mask = ent->pio_mask;
 	ap->mwdma_mask = ent->mwdma_mask;
 	ap->udma_mask = ent->udma_mask;

index dfdf4a7..99ed16c 100644
@@ -487,7 +487,7 @@ static void piix_pata_cbl_detect(struct 
 		goto cbl40;
 
 	/* check BIOS cable detect results */
-	mask = ap->hard_port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
+	mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
 	pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
 	if ((tmp & mask) == 0)
 		goto cbl40;

@@ -513,7 +513,7 @@ static int piix_pata_prereset(struct ata
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
 
-	if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->hard_port_no])) {
+	if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no])) {
 		ata_port_printk(ap, KERN_INFO, "port disabled. ignoring.\n");
 		ap->eh_context.i.action &= ~ATA_EH_RESET_MASK;
 		return 0;

@@ -550,7 +550,7 @@ static int piix_sata_prereset(struct ata
 	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
 	struct piix_host_priv *hpriv = ap->host_set->private_data;
 	const unsigned int *map = hpriv->map;
-	int base = 2 * ap->hard_port_no;
+	int base = 2 * ap->port_no;
 	unsigned int present = 0;
 	int port, i;
 	u16 pcs;

@@ -601,7 +601,7 @@ static void piix_set_piomode (struct ata
 	unsigned int pio	= adev->pio_mode - XFER_PIO_0;
 	struct pci_dev *dev	= to_pci_dev(ap->host_set->dev);
 	unsigned int is_slave	= (adev->devno != 0);
-	unsigned int master_port= ap->hard_port_no ? 0x42 : 0x40;
+	unsigned int master_port= ap->port_no ? 0x42 : 0x40;
 	unsigned int slave_port	= 0x44;
 	u16 master_data;
 	u8 slave_data;

@@ -619,10 +619,10 @@ static void piix_set_piomode (struct ata
 		/* enable PPE, IE and TIME */
 		master_data |= 0x0070;
 		pci_read_config_byte(dev, slave_port, &slave_data);
-		slave_data &= (ap->hard_port_no ? 0x0f : 0xf0);
+		slave_data &= (ap->port_no ? 0x0f : 0xf0);
 		slave_data |=
 			(timings[pio][0] << 2) |
-			(timings[pio][1] << (ap->hard_port_no ? 4 : 0));
+			(timings[pio][1] << (ap->port_no ? 4 : 0));
 	} else {
 		master_data &= 0xccf8;
 		/* enable PPE, IE and TIME */

@@ -652,9 +652,9 @@ static void piix_set_dmamode (struct ata
 {
 	unsigned int udma	= adev->dma_mode; /* FIXME: MWDMA too */
 	struct pci_dev *dev	= to_pci_dev(ap->host_set->dev);
-	u8 maslave		= ap->hard_port_no ? 0x42 : 0x40;
+	u8 maslave		= ap->port_no ? 0x42 : 0x40;
 	u8 speed		= udma;
-	unsigned int drive_dn	= (ap->hard_port_no ? 2 : 0) + adev->devno;
+	unsigned int drive_dn	= (ap->port_no ? 2 : 0) + adev->devno;
 	int a_speed		= 3 << (drive_dn * 4);
 	int u_flag		= 1 << drive_dn;
 	int v_flag		= 0x01 << drive_dn;

index 453dce0..9578b42 100644
@@ -5244,7 +5244,6 @@ static void ata_port_init(struct ata_por
 	ap->host_set = host_set;
 	ap->dev = ent->dev;
 	ap->port_no = port_no;
-	ap->hard_port_no = port_no;
 	ap->pio_mask = ent->pio_mask;
 	ap->mwdma_mask = ent->mwdma_mask;
 	ap->udma_mask = ent->udma_mask;

index 6a81aed..1b6283c 100644
@@ -352,12 +352,10 @@ struct ata_probe_ent {
 	struct scsi_host_template *sht;
 	struct ata_ioports	port[ATA_MAX_PORTS];
 	unsigned int		n_ports;
-	unsigned int		hard_port_no;
 	unsigned int		dummy_port_mask;
 	unsigned int		pio_mask;
 	unsigned int		mwdma_mask;
 	unsigned int		udma_mask;
-	unsigned int		legacy_mode;
 	unsigned long		irq;
 	unsigned long		irq2;
 	unsigned int		irq_flags;

@@ -509,7 +507,6 @@ struct ata_port {
 	unsigned int		pflags; /* ATA_PFLAG_xxx */
 	unsigned int		id;	/* unique id req'd by scsi midlyr */
 	unsigned int		port_no; /* unique port #; from zero */
-	unsigned int		hard_port_no;	/* hardware port #; from zero */
 
 	struct ata_prd		*prd;	 /* our SG list */
 	dma_addr_t		prd_dma; /* and its DMA mapping */