diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-02-18 19:30:02 +0300 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-03-02 05:12:03 +0300 |
| commit | c014906a870ce70e009def0c9d170ccabeb0be63 (patch) | |
| tree | b1cfb6520ed0bcdfb0f1b32282b94658a989b04f /drivers/dma/shdma.c | |
| parent | c8e3149ba7de24dfd4c37bb0df23c878cdecd8d4 (diff) | |
| download | linux-c014906a870ce70e009def0c9d170ccabeb0be63.tar.xz | |
dmaengine: shdma: extend .device_terminate_all() to record partial transfer
This patch extends the .device_terminate_all() method of the shdma driver
to return number of bytes transfered in the current descriptor.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/dma/shdma.c')
| -rw-r--r-- | drivers/dma/shdma.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c index ea6779f3e73f..5d17e09cb625 100644 --- a/drivers/dma/shdma.c +++ b/drivers/dma/shdma.c @@ -587,6 +587,19 @@ static void sh_dmae_terminate_all(struct dma_chan *chan) if (!chan) return; + dmae_halt(sh_chan); + + spin_lock_bh(&sh_chan->desc_lock); + if (!list_empty(&sh_chan->ld_queue)) { + /* Record partial transfer */ + struct sh_desc *desc = list_entry(sh_chan->ld_queue.next, + struct sh_desc, node); + desc->partial = (desc->hw.tcr - sh_dmae_readl(sh_chan, TCR)) << + sh_chan->xmit_shift; + + } + spin_unlock_bh(&sh_chan->desc_lock); + sh_dmae_chan_ld_cleanup(sh_chan, true); } @@ -701,6 +714,9 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan) /* Find the first not transferred desciptor */ list_for_each_entry(desc, &sh_chan->ld_queue, node) if (desc->mark == DESC_SUBMITTED) { + dev_dbg(sh_chan->dev, "Queue #%d to %d: %u@%x -> %x\n", + desc->async_tx.cookie, sh_chan->id, + desc->hw.tcr, desc->hw.sar, desc->hw.dar); /* Get the ld start address from ld_queue */ dmae_set_reg(sh_chan, &desc->hw); dmae_start(sh_chan); |