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| author | mav <mav@FreeBSD.org> | 2010-11-06 14:22:50 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2010-11-06 14:22:50 +0000 |
| commit | eed6d0709d65fbc6f51a831374ae6d4370e02b1a (patch) | |
| tree | 25dfaa83d08dfa93373f6ddfec9b6de683a1317e /sys/dev/ata | |
| parent | ddf20369b91fcc78d9d31188840d584fc21144d6 (diff) | |
| download | FreeBSD-src-eed6d0709d65fbc6f51a831374ae6d4370e02b1a.zip FreeBSD-src-eed6d0709d65fbc6f51a831374ae6d4370e02b1a.tar.gz | |
Add support for odd-sized PIO transfers, sometimes used by ATAPI.
Diffstat (limited to 'sys/dev/ata')
| -rw-r--r-- | sys/dev/ata/ata-lowlevel.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/sys/dev/ata/ata-lowlevel.c b/sys/dev/ata/ata-lowlevel.c index 288fd17..3ef31cf 100644 --- a/sys/dev/ata/ata-lowlevel.c +++ b/sys/dev/ata/ata-lowlevel.c @@ -833,12 +833,18 @@ ata_pio_read(struct ata_request *request, int length) struct ata_channel *ch = device_get_softc(request->parent); int size = min(request->transfersize, length); int resid; + uint8_t buf[2]; - if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t))) + if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t))) { ATA_IDX_INSW_STRM(ch, ATA_DATA, (void*)((uintptr_t)request->data+request->donecount), size / sizeof(int16_t)); - else + if (size & 1) { + ATA_IDX_INSW_STRM(ch, ATA_DATA, (void*)buf, 1); + ((uint8_t *)request->data + request->donecount + + (size & ~1))[0] = buf[0]; + } + } else ATA_IDX_INSL_STRM(ch, ATA_DATA, (void*)((uintptr_t)request->data+request->donecount), size / sizeof(int32_t)); @@ -846,7 +852,7 @@ ata_pio_read(struct ata_request *request, int length) if (request->transfersize < length) { device_printf(request->parent, "WARNING - %s read data overrun %d>%d\n", ata_cmd2str(request), length, request->transfersize); - for (resid = request->transfersize; resid < length; + for (resid = request->transfersize + (size & 1); resid < length; resid += sizeof(int16_t)) ATA_IDX_INW(ch, ATA_DATA); } @@ -858,12 +864,18 @@ ata_pio_write(struct ata_request *request, int length) struct ata_channel *ch = device_get_softc(request->parent); int size = min(request->transfersize, length); int resid; + uint8_t buf[2]; - if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t))) + if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t))) { ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (void*)((uintptr_t)request->data+request->donecount), size / sizeof(int16_t)); - else + if (size & 1) { + buf[0] = ((uint8_t *)request->data + request->donecount + + (size & ~1))[0]; + ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (void*)buf, 1); + } + } else ATA_IDX_OUTSL_STRM(ch, ATA_DATA, (void*)((uintptr_t)request->data+request->donecount), size / sizeof(int32_t)); @@ -871,7 +883,7 @@ ata_pio_write(struct ata_request *request, int length) if (request->transfersize < length) { device_printf(request->parent, "WARNING - %s write data underrun %d>%d\n", ata_cmd2str(request), length, request->transfersize); - for (resid = request->transfersize; resid < length; + for (resid = request->transfersize + (size & 1); resid < length; resid += sizeof(int16_t)) ATA_IDX_OUTW(ch, ATA_DATA, 0); } |
