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authorDavid Moore <dcm@acm.org>2007-02-03 03:09:09 -0500
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-02-08 21:36:18 +0100
commita5782010b4e75cba571357efaa27df22a89427c2 (patch)
treee4ecf091108230c6f65b221507ac0b7902154891 /drivers/ieee1394/video1394.c
parent0fe4c6fcacb28bda75b31f63d3629f640a6b9bf9 (diff)
downloadop-kernel-dev-a5782010b4e75cba571357efaa27df22a89427c2.zip
op-kernel-dev-a5782010b4e75cba571357efaa27df22a89427c2.tar.gz
ieee1394: video1394: DMA fix
This together with the phys_to_virt fix in lib/swiotlb.c::swiotlb_sync_sg fixes video1394 DMA on machines with DMA bounce buffers, especially Intel x86-64 machines with > 3GB RAM. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: David Moore <dcm@acm.org> Tested-by: Nicolas Turro <Nicolas.Turro@inrialpes.fr>
Diffstat (limited to 'drivers/ieee1394/video1394.c')
-rw-r--r--drivers/ieee1394/video1394.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ieee1394/video1394.c b/drivers/ieee1394/video1394.c
index 598b19f..f4d1ec00 100644
--- a/drivers/ieee1394/video1394.c
+++ b/drivers/ieee1394/video1394.c
@@ -489,6 +489,9 @@ static void wakeup_dma_ir_ctx(unsigned long l)
reset_ir_status(d, i);
d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
do_gettimeofday(&d->buffer_time[d->buffer_prg_assignment[i]]);
+ dma_region_sync_for_cpu(&d->dma,
+ d->buffer_prg_assignment[i] * d->buf_size,
+ d->buf_size);
}
}
@@ -1096,6 +1099,8 @@ static long video1394_ioctl(struct file *file,
DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
d->ctx);
put_timestamp(ohci, d, d->last_buffer);
+ dma_region_sync_for_device(&d->dma,
+ v.buffer * d->buf_size, d->buf_size);
/* Tell the controller where the first program is */
reg_write(ohci, d->cmdPtr,
@@ -1111,6 +1116,9 @@ static long video1394_ioctl(struct file *file,
"Waking up iso transmit dma ctx=%d",
d->ctx);
put_timestamp(ohci, d, d->last_buffer);
+ dma_region_sync_for_device(&d->dma,
+ v.buffer * d->buf_size, d->buf_size);
+
reg_write(ohci, d->ctrlSet, 0x1000);
}
}
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