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Commit 345347c5 authored by Yuan-Hsin Chen's avatar Yuan-Hsin Chen Committed by Jeff Garzik
Browse files

ahci: move ahci_sb600_softreset to libahci.c and rename it 



ahci_sb600_softreset was in ahci.c. This function is used
to fix soft reset failure and renames as ahci_pmp_retry_softreset
in libahci.c.

Signed-off-by: default avatarYuan-Hsin Chen <yhchen@faraday-tech.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent 8ea7645c

drivers/ata/ahci.c

+2 −58
Original line number Diff line number Diff line
@@ -79,8 +79,6 @@ enum board_ids { 
};



static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);

static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,

			  unsigned long deadline);

static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,

				 unsigned long deadline);

static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
@@ -104,12 +102,6 @@ static struct ata_port_operations ahci_p5wdh_ops = { 
	.hardreset		= ahci_p5wdh_hardreset,

};



static struct ata_port_operations ahci_sb600_ops = {

	.inherits		= &ahci_ops,

	.softreset		= ahci_sb600_softreset,

	.pmp_softreset		= ahci_sb600_softreset,

};



#define AHCI_HFLAGS(flags)	.private_data	= (void *)(flags)



static const struct ata_port_info ahci_port_info[] = {
@@ -188,7 +180,7 @@ static const struct ata_port_info ahci_port_info[] = { 
		.flags		= AHCI_FLAG_COMMON,

		.pio_mask	= ATA_PIO4,

		.udma_mask	= ATA_UDMA6,

		.port_ops	= &ahci_sb600_ops,

		.port_ops	= &ahci_pmp_retry_srst_ops,

	},

	[board_ahci_sb700] =	/* for SB700 and SB800 */

	{
@@ -196,7 +188,7 @@ static const struct ata_port_info ahci_port_info[] = { 
		.flags		= AHCI_FLAG_COMMON,

		.pio_mask	= ATA_PIO4,

		.udma_mask	= ATA_UDMA6,

		.port_ops	= &ahci_sb600_ops,

		.port_ops	= &ahci_pmp_retry_srst_ops,

	},

	[board_ahci_vt8251] =

	{
@@ -502,54 +494,6 @@ static void ahci_pci_init_controller(struct ata_host *host) 
	ahci_init_controller(host);

}



static int ahci_sb600_check_ready(struct ata_link *link)

{

	void __iomem *port_mmio = ahci_port_base(link->ap);

	u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;

	u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);



	/*

	 * There is no need to check TFDATA if BAD PMP is found due to HW bug,

	 * which can save timeout delay.

	 */

	if (irq_status & PORT_IRQ_BAD_PMP)

		return -EIO;



	return ata_check_ready(status);

}



static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,

				unsigned long deadline)

{

	struct ata_port *ap = link->ap;

	void __iomem *port_mmio = ahci_port_base(ap);

	int pmp = sata_srst_pmp(link);

	int rc;

	u32 irq_sts;



	DPRINTK("ENTER\n");



	rc = ahci_do_softreset(link, class, pmp, deadline,

			       ahci_sb600_check_ready);



	/*

	 * Soft reset fails on some ATI chips with IPMS set when PMP

	 * is enabled but SATA HDD/ODD is connected to SATA port,

	 * do soft reset again to port 0.

	 */

	if (rc == -EIO) {

		irq_sts = readl(port_mmio + PORT_IRQ_STAT);

		if (irq_sts & PORT_IRQ_BAD_PMP) {

			ata_link_warn(link,

				      "applying SB600 PMP SRST workaround and retrying\n");

			rc = ahci_do_softreset(link, class, 0, deadline,

					       ahci_check_ready);

		}

	}



	return rc;

}



static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,

				 unsigned long deadline)

{

drivers/ata/ahci.h

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ extern struct device_attribute *ahci_sdev_attrs[]; 
	.sdev_attrs		= ahci_sdev_attrs



extern struct ata_port_operations ahci_ops;

extern struct ata_port_operations ahci_pmp_retry_srst_ops;



void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,

			u32 opts);

drivers/ata/libahci.c

+57 −0
Original line number Diff line number Diff line
@@ -82,6 +82,8 @@ static void ahci_pmp_attach(struct ata_port *ap); 
static void ahci_pmp_detach(struct ata_port *ap);

static int ahci_softreset(struct ata_link *link, unsigned int *class,

			  unsigned long deadline);

static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,

			  unsigned long deadline);

static int ahci_hardreset(struct ata_link *link, unsigned int *class,

			  unsigned long deadline);

static void ahci_postreset(struct ata_link *link, unsigned int *class);
@@ -178,6 +180,12 @@ struct ata_port_operations ahci_ops = { 
};

EXPORT_SYMBOL_GPL(ahci_ops);



struct ata_port_operations ahci_pmp_retry_srst_ops = {

	.inherits		= &ahci_ops,

	.softreset		= ahci_pmp_retry_softreset,

};

EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);



int ahci_em_messages = 1;

EXPORT_SYMBOL_GPL(ahci_em_messages);

module_param(ahci_em_messages, int, 0444);
@@ -1319,6 +1327,55 @@ static int ahci_softreset(struct ata_link *link, unsigned int *class, 
}

EXPORT_SYMBOL_GPL(ahci_do_softreset);



static int ahci_bad_pmp_check_ready(struct ata_link *link)

{

	void __iomem *port_mmio = ahci_port_base(link->ap);

	u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;

	u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);



	/*

	 * There is no need to check TFDATA if BAD PMP is found due to HW bug,

	 * which can save timeout delay.

	 */

	if (irq_status & PORT_IRQ_BAD_PMP)

		return -EIO;



	return ata_check_ready(status);

}



int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,

				unsigned long deadline)

{

	struct ata_port *ap = link->ap;

	void __iomem *port_mmio = ahci_port_base(ap);

	int pmp = sata_srst_pmp(link);

	int rc;

	u32 irq_sts;



	DPRINTK("ENTER\n");



	rc = ahci_do_softreset(link, class, pmp, deadline,

			       ahci_bad_pmp_check_ready);



	/*

	 * Soft reset fails with IPMS set when PMP is enabled but

	 * SATA HDD/ODD is connected to SATA port, do soft reset

	 * again to port 0.

	 */

	if (rc == -EIO) {

		irq_sts = readl(port_mmio + PORT_IRQ_STAT);

		if (irq_sts & PORT_IRQ_BAD_PMP) {

			ata_link_printk(link, KERN_WARNING,

					"applying PMP SRST workaround "

					"and retrying\n");

			rc = ahci_do_softreset(link, class, 0, deadline,

					       ahci_check_ready);

		}

	}



	return rc;

}



static int ahci_hardreset(struct ata_link *link, unsigned int *class,

			  unsigned long deadline)

{