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Commit 10305f0f authored by Alan Cox's avatar Alan Cox Committed by Jeff Garzik
Browse files

Add id_to_dma_mode function for printing DMA modes 



Also export dev_disable as this is needed by drivers doing slave decode
filtering, which will follow shortly

Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 098cdff3

drivers/ata/libata-core.c

+44 −0
Original line number Diff line number Diff line
@@ -823,6 +823,48 @@ static u64 ata_id_n_sectors(const u16 *id) 
	}

}



/**

 *	ata_id_to_dma_mode	-	Identify DMA mode from id block

 *	@dev: device to identify

 *	@mode: mode to assume if we cannot tell

 *

 *	Set up the timing values for the device based upon the identify

 *	reported values for the DMA mode. This function is used by drivers

 *	which rely upon firmware configured modes, but wish to report the

 *	mode correctly when possible.

 *

 *	In addition we emit similarly formatted messages to the default

 *	ata_dev_set_mode handler, in order to provide consistency of

 *	presentation.

 */



void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown)

{

	unsigned int mask;

	u8 mode;



	/* Pack the DMA modes */

	mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA;

	if (dev->id[53] & 0x04)

		mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA;



	/* Select the mode in use */

	mode = ata_xfer_mask2mode(mask);



	if (mode != 0) {

		ata_dev_printk(dev, KERN_INFO, "configured for %s\n",

		       ata_mode_string(mask));

	} else {

		/* SWDMA perhaps ? */

		mode = unknown;

		ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");

	}



	/* Configure the device reporting */

	dev->xfer_mode = mode;

	dev->xfer_shift = ata_xfer_mode2shift(mode);

}



/**

 *	ata_noop_dev_select - Select device 0/1 on ATA bus

 *	@ap: ATA channel to manipulate
@@ -6276,6 +6318,7 @@ EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 
EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);

EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);

EXPORT_SYMBOL_GPL(ata_port_probe);

EXPORT_SYMBOL_GPL(ata_dev_disable);

EXPORT_SYMBOL_GPL(sata_set_spd);

EXPORT_SYMBOL_GPL(sata_phy_debounce);

EXPORT_SYMBOL_GPL(sata_phy_resume);
@@ -6310,6 +6353,7 @@ EXPORT_SYMBOL_GPL(ata_host_suspend); 
EXPORT_SYMBOL_GPL(ata_host_resume);

EXPORT_SYMBOL_GPL(ata_id_string);

EXPORT_SYMBOL_GPL(ata_id_c_string);

EXPORT_SYMBOL_GPL(ata_id_to_dma_mode);

EXPORT_SYMBOL_GPL(ata_device_blacklisted);

EXPORT_SYMBOL_GPL(ata_scsi_simulate);

include/linux/libata.h

+2 −0
Original line number Diff line number Diff line
@@ -788,10 +788,12 @@ extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 
extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,

		 unsigned int n_elem);

extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);

extern void ata_dev_disable(struct ata_device *adev);

extern void ata_id_string(const u16 *id, unsigned char *s,

			  unsigned int ofs, unsigned int len);

extern void ata_id_c_string(const u16 *id, unsigned char *s,

			    unsigned int ofs, unsigned int len);

extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);

extern unsigned long ata_device_blacklisted(const struct ata_device *dev);

extern void ata_bmdma_setup (struct ata_queued_cmd *qc);

extern void ata_bmdma_start (struct ata_queued_cmd *qc);