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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>
This commit is contained in:
David Moore 2007-02-03 03:09:09 -05:00 committed by Stefan Richter
parent 0fe4c6fcac
commit a5782010b4
1 changed files with 8 additions and 0 deletions
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8
drivers/ieee1394/video1394.c
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@ -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);
}
}