From: David Moore Date: Sat, 3 Feb 2007 08:09:09 +0000 (-0500) Subject: ieee1394: video1394: DMA fix X-Git-Tag: firefly_0821_release~31107^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a5782010b4e75cba571357efaa27df22a89427c2;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: David Moore Tested-by: Nicolas Turro --- diff --git a/drivers/ieee1394/video1394.c b/drivers/ieee1394/video1394.c index 598b19fc5989..f4d1ec00af65 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); } }