Differential D23730 Diff 68462 sys/dev/altera/sdcard/altera_sdcard_io.c

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sys/dev/altera/sdcard/altera_sdcard_io.c

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}		}
} while (differences != 0);		} while (differences != 0);
if (retry_counter)		if (retry_counter)
device_printf(sc->as_dev, "%s: succeeded after %u retries\n",		device_printf(sc->as_dev, "%s: succeeded after %u retries\n",
__func__, retry_counter);		__func__, retry_counter);
}		}

static void		static void
altera_sdcard_io_start_internal(struct altera_sdcard_softc sc, struct bio *bp)		altera_sdcard_io_start_internal(struct altera_sdcard_softc sc, struct bio *bpp)
{		{

switch (*bp->bio_cmd) {		switch ((*bpp)->bio_cmd) {
case BIO_READ:		case BIO_READ:
altera_sdcard_write_cmd_arg(sc, bp->bio_pblkno		altera_sdcard_write_cmd_arg(sc, (bpp)->bio_pblkno
ALTERA_SDCARD_SECTORSIZE);		ALTERA_SDCARD_SECTORSIZE);
altera_sdcard_write_cmd(sc, ALTERA_SDCARD_CMD_READ_BLOCK);		altera_sdcard_write_cmd(sc, ALTERA_SDCARD_CMD_READ_BLOCK);
break;		break;

case BIO_WRITE:		case BIO_WRITE:
altera_sdcard_write_rxtx_buffer(sc, *bp->bio_data,		altera_sdcard_write_rxtx_buffer(sc, (*bpp)->bio_data,
*bp->bio_bcount);		(*bpp)->bio_bcount);
altera_sdcard_write_cmd_arg(sc, bp->bio_pblkno		altera_sdcard_write_cmd_arg(sc, (bpp)->bio_pblkno
ALTERA_SDCARD_SECTORSIZE);		ALTERA_SDCARD_SECTORSIZE);
altera_sdcard_write_cmd(sc, ALTERA_SDCARD_CMD_WRITE_BLOCK);		altera_sdcard_write_cmd(sc, ALTERA_SDCARD_CMD_WRITE_BLOCK);
break;		break;

default:		default:
biofinish(*bp, NULL, EOPNOTSUPP);		biofinish(*bpp, NULL, EOPNOTSUPP);
*bp = NULL;		*bpp = NULL;
}		}
}		}

void		void
altera_sdcard_io_start(struct altera_sdcard_softc sc, struct bio bp)		altera_sdcard_io_start(struct altera_sdcard_softc sc, struct bio bp)
{		{

ALTERA_SDCARD_LOCK_ASSERT(sc);		ALTERA_SDCARD_LOCK_ASSERT(sc);
KASSERT(sc->as_currentbio == NULL,		KASSERT(sc->as_currentbio == NULL,
("%s: bio already started", __func__));		("%s: bio already started", __func__));

/*		/*
* We advertise a block size and maximum I/O size up the stack of the		* We advertise a block size and maximum I/O size up the stack of the
* SD Card IP Core sector size. Catch any attempts to not follow the		* SD Card IP Core sector size. Catch any attempts to not follow the
* rules.		* rules.
*/		*/
KASSERT(bp->bio_bcount == ALTERA_SDCARD_SECTORSIZE,		KASSERT(bp->bio_bcount == ALTERA_SDCARD_SECTORSIZE,
("%s: I/O size not %d", __func__, ALTERA_SDCARD_SECTORSIZE));		("%s: I/O size not %d", __func__, ALTERA_SDCARD_SECTORSIZE));
altera_sdcard_io_start_internal(sc, &bp);		altera_sdcard_io_start_internal(sc, &bp);
sc->as_currentbio = *bp;		sc->as_currentbio = bp;
sc->as_retriesleft = ALTERA_SDCARD_RETRY_LIMIT;		sc->as_retriesleft = ALTERA_SDCARD_RETRY_LIMIT;
}		}

/*		/*
* Handle completed I/O. ASR is passed in to avoid reading it more than once.		* Handle completed I/O. ASR is passed in to avoid reading it more than once.
* Return 1 if the I/O is actually complete (success, or retry limit		* Return 1 if the I/O is actually complete (success, or retry limit
* exceeded), or 0 if not.		* exceeded), or 0 if not.
*/		*/
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