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>
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@ -489,6 +489,9 @@ static void wakeup_dma_ir_ctx(unsigned long l)
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reset_ir_status(d, i);
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d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
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do_gettimeofday(&d->buffer_time[d->buffer_prg_assignment[i]]);
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dma_region_sync_for_cpu(&d->dma,
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d->buffer_prg_assignment[i] * d->buf_size,
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d->buf_size);
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}
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}
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@ -1096,6 +1099,8 @@ static long video1394_ioctl(struct file *file,
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DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
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d->ctx);
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put_timestamp(ohci, d, d->last_buffer);
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dma_region_sync_for_device(&d->dma,
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v.buffer * d->buf_size, d->buf_size);
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/* Tell the controller where the first program is */
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reg_write(ohci, d->cmdPtr,
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@ -1111,6 +1116,9 @@ static long video1394_ioctl(struct file *file,
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"Waking up iso transmit dma ctx=%d",
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d->ctx);
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put_timestamp(ohci, d, d->last_buffer);
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dma_region_sync_for_device(&d->dma,
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v.buffer * d->buf_size, d->buf_size);
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reg_write(ohci, d->ctrlSet, 0x1000);
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}
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}
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