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Add id_to_dma_mode function for printing DMA modes

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

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan 2007-02-20 18:01:59 +00:00 committed by Jeff Garzik
parent 098cdff3d4
commit 10305f0f8e
2 changed files with 46 additions and 0 deletions
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44
drivers/ata/libata-core.c
View File

@ -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);

2
include/linux/libata.h
View File

@ -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);