[libata] Move some bmdma-specific code to libata-bmdma.c

No code changes, just moving code between files.

drivers/scsi/libata-bmdma.c

@@ -418,6 +418,240 @@ u8 ata_altstatus(struct ata_port *ap)
 	return inb(ap->ioaddr.altstatus_addr);
 }
 
+/**
+ *	ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
+	u8 dmactl;
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
+
+	/* load PRD table addr. */
+	mb();	/* make sure PRD table writes are visible to controller */
+	writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
+
+	/* specify data direction, triple-check start bit is clear */
+	dmactl = readb(mmio + ATA_DMA_CMD);
+	dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
+	if (!rw)
+		dmactl |= ATA_DMA_WR;
+	writeb(dmactl, mmio + ATA_DMA_CMD);
+
+	/* issue r/w command */
+	ap->ops->exec_command(ap, &qc->tf);
+}
+
+/**
+ *	ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
+	u8 dmactl;
+
+	/* start host DMA transaction */
+	dmactl = readb(mmio + ATA_DMA_CMD);
+	writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
+
+	/* Strictly, one may wish to issue a readb() here, to
+	 * flush the mmio write.  However, control also passes
+	 * to the hardware at this point, and it will interrupt
+	 * us when we are to resume control.  So, in effect,
+	 * we don't care when the mmio write flushes.
+	 * Further, a read of the DMA status register _immediately_
+	 * following the write may not be what certain flaky hardware
+	 * is expected, so I think it is best to not add a readb()
+	 * without first all the MMIO ATA cards/mobos.
+	 * Or maybe I'm just being paranoid.
+	 */
+}
+
+/**
+ *	ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
+	u8 dmactl;
+
+	/* load PRD table addr. */
+	outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
+
+	/* specify data direction, triple-check start bit is clear */
+	dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
+	if (!rw)
+		dmactl |= ATA_DMA_WR;
+	outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+
+	/* issue r/w command */
+	ap->ops->exec_command(ap, &qc->tf);
+}
+
+/**
+ *	ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_bmdma_start_pio (struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	u8 dmactl;
+
+	/* start host DMA transaction */
+	dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	outb(dmactl | ATA_DMA_START,
+	     ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+}
+
+
+/**
+ *	ata_bmdma_start - Start a PCI IDE BMDMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	Writes the ATA_DMA_START flag to the DMA command register.
+ *
+ *	May be used as the bmdma_start() entry in ata_port_operations.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+void ata_bmdma_start(struct ata_queued_cmd *qc)
+{
+	if (qc->ap->flags & ATA_FLAG_MMIO)
+		ata_bmdma_start_mmio(qc);
+	else
+		ata_bmdma_start_pio(qc);
+}
+
+
+/**
+ *	ata_bmdma_setup - Set up PCI IDE BMDMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	Writes address of PRD table to device's PRD Table Address
+ *	register, sets the DMA control register, and calls
+ *	ops->exec_command() to start the transfer.
+ *
+ *	May be used as the bmdma_setup() entry in ata_port_operations.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+void ata_bmdma_setup(struct ata_queued_cmd *qc)
+{
+	if (qc->ap->flags & ATA_FLAG_MMIO)
+		ata_bmdma_setup_mmio(qc);
+	else
+		ata_bmdma_setup_pio(qc);
+}
+
+
+/**
+ *	ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
+ *	@ap: Port associated with this ATA transaction.
+ *
+ *	Clear interrupt and error flags in DMA status register.
+ *
+ *	May be used as the irq_clear() entry in ata_port_operations.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+void ata_bmdma_irq_clear(struct ata_port *ap)
+{
+	if (!ap->ioaddr.bmdma_addr)
+		return;
+
+	if (ap->flags & ATA_FLAG_MMIO) {
+		void __iomem *mmio =
+		      ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS;
+		writeb(readb(mmio), mmio);
+	} else {
+		unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS;
+		outb(inb(addr), addr);
+	}
+}
+
+
+/**
+ *	ata_bmdma_status - Read PCI IDE BMDMA status
+ *	@ap: Port associated with this ATA transaction.
+ *
+ *	Read and return BMDMA status register.
+ *
+ *	May be used as the bmdma_status() entry in ata_port_operations.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+u8 ata_bmdma_status(struct ata_port *ap)
+{
+	u8 host_stat;
+	if (ap->flags & ATA_FLAG_MMIO) {
+		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);
+	return host_stat;
+}
+
+
+/**
+ *	ata_bmdma_stop - Stop PCI IDE BMDMA transfer
+ *	@qc: Command we are ending DMA for
+ *
+ *	Clears the ATA_DMA_START flag in the dma control register
+ *
+ *	May be used as the bmdma_stop() entry in ata_port_operations.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ */
+
+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;
+
+		/* clear start/stop bit */
+		writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
+			mmio + ATA_DMA_CMD);
+	} else {
+		/* clear start/stop bit */
+		outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
+			ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	}
+
+	/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
+	ata_altstatus(ap);        /* dummy read */
+}
+
 #ifdef CONFIG_PCI
 static struct ata_probe_ent *
 ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)

drivers/scsi/libata-core.c

@@ -4064,240 +4064,6 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
 	return 0;
 }
 
-/**
- *	ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
-	u8 dmactl;
-	void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-
-	/* load PRD table addr. */
-	mb();	/* make sure PRD table writes are visible to controller */
-	writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
-
-	/* specify data direction, triple-check start bit is clear */
-	dmactl = readb(mmio + ATA_DMA_CMD);
-	dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
-	if (!rw)
-		dmactl |= ATA_DMA_WR;
-	writeb(dmactl, mmio + ATA_DMA_CMD);
-
-	/* issue r/w command */
-	ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- *	ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-	u8 dmactl;
-
-	/* start host DMA transaction */
-	dmactl = readb(mmio + ATA_DMA_CMD);
-	writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
-
-	/* Strictly, one may wish to issue a readb() here, to
-	 * flush the mmio write.  However, control also passes
-	 * to the hardware at this point, and it will interrupt
-	 * us when we are to resume control.  So, in effect,
-	 * we don't care when the mmio write flushes.
-	 * Further, a read of the DMA status register _immediately_
-	 * following the write may not be what certain flaky hardware
-	 * is expected, so I think it is best to not add a readb()
-	 * without first all the MMIO ATA cards/mobos.
-	 * Or maybe I'm just being paranoid.
-	 */
-}
-
-/**
- *	ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
- *	@qc: Info associated with this ATA transaction.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
-	u8 dmactl;
-
-	/* load PRD table addr. */
-	outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
-
-	/* specify data direction, triple-check start bit is clear */
-	dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-	dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
-	if (!rw)
-		dmactl |= ATA_DMA_WR;
-	outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
-	/* issue r/w command */
-	ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- *	ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
- *	@qc: Info associated with this ATA transaction.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_pio (struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	u8 dmactl;
-
-	/* start host DMA transaction */
-	dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-	outb(dmactl | ATA_DMA_START,
-	     ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-}
-
-
-/**
- *	ata_bmdma_start - Start a PCI IDE BMDMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	Writes the ATA_DMA_START flag to the DMA command register.
- *
- *	May be used as the bmdma_start() entry in ata_port_operations.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-void ata_bmdma_start(struct ata_queued_cmd *qc)
-{
-	if (qc->ap->flags & ATA_FLAG_MMIO)
-		ata_bmdma_start_mmio(qc);
-	else
-		ata_bmdma_start_pio(qc);
-}
-
-
-/**
- *	ata_bmdma_setup - Set up PCI IDE BMDMA transaction
- *	@qc: Info associated with this ATA transaction.
- *
- *	Writes address of PRD table to device's PRD Table Address
- *	register, sets the DMA control register, and calls
- *	ops->exec_command() to start the transfer.
- *
- *	May be used as the bmdma_setup() entry in ata_port_operations.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-void ata_bmdma_setup(struct ata_queued_cmd *qc)
-{
-	if (qc->ap->flags & ATA_FLAG_MMIO)
-		ata_bmdma_setup_mmio(qc);
-	else
-		ata_bmdma_setup_pio(qc);
-}
-
-
-/**
- *	ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
- *	@ap: Port associated with this ATA transaction.
- *
- *	Clear interrupt and error flags in DMA status register.
- *
- *	May be used as the irq_clear() entry in ata_port_operations.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-void ata_bmdma_irq_clear(struct ata_port *ap)
-{
-	if (!ap->ioaddr.bmdma_addr)
-		return;
-
-	if (ap->flags & ATA_FLAG_MMIO) {
-		void __iomem *mmio =
-		      ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS;
-		writeb(readb(mmio), mmio);
-	} else {
-		unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS;
-		outb(inb(addr), addr);
-	}
-}
-
-
-/**
- *	ata_bmdma_status - Read PCI IDE BMDMA status
- *	@ap: Port associated with this ATA transaction.
- *
- *	Read and return BMDMA status register.
- *
- *	May be used as the bmdma_status() entry in ata_port_operations.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-u8 ata_bmdma_status(struct ata_port *ap)
-{
-	u8 host_stat;
-	if (ap->flags & ATA_FLAG_MMIO) {
-		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);
-	return host_stat;
-}
-
-
-/**
- *	ata_bmdma_stop - Stop PCI IDE BMDMA transfer
- *	@qc: Command we are ending DMA for
- *
- *	Clears the ATA_DMA_START flag in the dma control register
- *
- *	May be used as the bmdma_stop() entry in ata_port_operations.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-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;
-
-		/* clear start/stop bit */
-		writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
-			mmio + ATA_DMA_CMD);
-	} else {
-		/* clear start/stop bit */
-		outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
-			ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-	}
-
-	/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
-	ata_altstatus(ap);        /* dummy read */
-}
-
 /**
  *	ata_host_intr - Handle host interrupt for given (port, task)
  *	@ap: Port on which interrupt arrived (possibly...)