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Commit 9f45cbd3 authored by Kristen Carlson Accardi's avatar Kristen Carlson Accardi Committed by Jeff Garzik
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[libata] check for SATA async notify support



Check to see if an ATAPI device supports Asynchronous Notification.
If so, enable it, if the host controller supports AN.

Signed-off-by: default avatarKristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 05d1efff
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+53 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
static unsigned int ata_dev_init_params(struct ata_device *dev,
					u16 heads, u16 sectors);
static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable);
static void ata_dev_xfermask(struct ata_device *dev);
static unsigned long ata_dev_blacklisted(const struct ata_device *dev);

@@ -1987,6 +1988,22 @@ int ata_dev_configure(struct ata_device *dev)
		}
		dev->cdb_len = (unsigned int) rc;

		/*
		 * check to see if this ATAPI device supports
		 * Asynchronous Notification
		 */
		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
			int err;
			/* issue SET feature command to turn this on */
			err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
			if (err)
				ata_dev_printk(dev, KERN_ERR,
						"unable to set AN, err %x\n",
						err);
			else
				dev->flags |= ATA_DFLAG_AN;
		}

		if (ata_id_cdb_intr(dev->id)) {
			dev->flags |= ATA_DFLAG_CDB_INTR;
			cdb_intr_string = ", CDB intr";
@@ -3974,6 +3991,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
	return err_mask;
}

/**
 *	ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
 *	@dev: Device to which command will be sent
 *	@enable: Whether to enable or disable the feature
 *
 *	Issue SET FEATURES - SATA FEATURES command to device @dev
 *	on port @ap with sector count set to indicate Asynchronous
 *	Notification feature
 *
 *	LOCKING:
 *	PCI/etc. bus probe sem.
 *
 *	RETURNS:
 *	0 on success, AC_ERR_* mask otherwise.
 */
static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
{
	struct ata_taskfile tf;
	unsigned int err_mask;

	/* set up set-features taskfile */
	DPRINTK("set features - SATA features\n");

	ata_tf_init(dev, &tf);
	tf.command = ATA_CMD_SET_FEATURES;
	tf.feature = enable;
	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
	tf.protocol = ATA_PROT_NODATA;
	tf.nsect = SATA_AN;

	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);

	DPRINTK("EXIT, err_mask=%x\n", err_mask);
	return err_mask;
}

/**
 *	ata_dev_init_params - Issue INIT DEV PARAMS command
 *	@dev: Device to which command will be sent
+9 −0
Original line number Diff line number Diff line
@@ -230,6 +230,12 @@ enum {

	SETFEATURES_SPINUP	= 0x07, /* Spin-up drive */

	SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
	SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */

	/* SETFEATURE Sector counts for SATA features */
	SATA_AN			= 0x05,  /* Asynchronous Notification */

	/* ATAPI stuff */
	ATAPI_PKT_DMA		= (1 << 0),
	ATAPI_DMADIR		= (1 << 2),	/* ATAPI data dir:
@@ -357,6 +363,9 @@ struct ata_taskfile {
#define ata_id_queue_depth(id)	(((id)[75] & 0x1f) + 1)
#define ata_id_removeable(id)	((id)[0] & (1 << 7))
#define ata_id_has_dword_io(id)	((id)[50] & (1 << 0))
#define ata_id_has_AN(id)	\
	( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
	  ((id)[78] & (1 << 5)) )
#define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
#define ata_id_u32(id,n)	\
+2 −0
Original line number Diff line number Diff line
@@ -139,6 +139,7 @@ enum {
	ATA_DFLAG_FLUSH_EXT	= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
	ATA_DFLAG_ACPI_PENDING	= (1 << 5), /* ACPI resume action pending */
	ATA_DFLAG_ACPI_FAILED	= (1 << 6), /* ACPI on devcfg has failed */
	ATA_DFLAG_AN		= (1 << 7), /* device supports AN */
	ATA_DFLAG_CFG_MASK	= (1 << 8) - 1,

	ATA_DFLAG_PIO		= (1 << 8), /* device limited to PIO mode */
@@ -179,6 +180,7 @@ enum {
	ATA_FLAG_IGN_SIMPLEX	= (1 << 15), /* ignore SIMPLEX */
	ATA_FLAG_NO_IORDY	= (1 << 16), /* controller lacks iordy */
	ATA_FLAG_ACPI_SATA	= (1 << 17), /* need native SATA ACPI layout */
	ATA_FLAG_AN		= (1 << 18), /* controller supports AN */

	/* The following flag belongs to ap->pflags but is kept in
	 * ap->flags because it's referenced in many LLDs and will be