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Date: Fri, 26 Mar 2010 17:17:19 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: Linus Walleij <linus.walleij@...ricsson.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@....de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Sosnowski, Maciej" <maciej.sosnowski@...el.com>,
Nicolas Ferre <nicolas.ferre@...el.com>,
Pavel Machek <pavel@....cz>, Li Yang <leoli@...escale.com>,
Paul Mundt <lethal@...ux-sh.org>,
Ralf Baechle <ralf@...ux-mips.org>,
Haavard Skinnemoen <haavard.skinnemoen@...el.com>,
Magnus Damm <damm@...nsource.se>,
Liam Girdwood <lrg@...mlogic.co.uk>,
Joe Perches <joe@...ches.com>,
Roland Dreier <rdreier@...co.com>,
Richard Röjfors
<richard.rojfors@...agicore.com>,
"Steven J. Magnani" <steve@...idescorp.com>
Subject: Re: [PATCH 2/2] DMAENGINE: generic channel status v2
On Fri, 2010-03-26 at 07:20 -0700, Linus Walleij wrote:
> Convert the device_is_tx_complete() operation on the
> DMA engine to a generic device_tx_status()operation which
> can return three states, DMA_TX_RUNNING, DMA_TX_COMPLETE,
> DMA_TX_PAUSED.
>
Ok, this one and the previous both look good to me. I fixed them up for
the new timberdale driver, and added the patch below. They pass
build_dma.sh without issue, so I'll get them pushed out to my next
branch.
Sidenote: one thing I notice via this exercise is that not every driver
is triggering a descriptor cleanup in their device_tx_status()
implementation. It's really only needed for the drivers that will
service requests from the async_tx api (now the minority), but something
to keep in mind. In some cases async_tx polls for completion on
descriptor allocation failure, so either ->device_tx_status() or
->device_prep* needs to run descriptor reclaim.
Thanks,
Dan
---
dmaengine: provide helper for setting txstate
From: Dan Williams <dan.j.williams@...el.com>
Simple conditional struct filler to cut out some duplicated code.
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
drivers/dma/at_hdmac.c | 7 +------
drivers/dma/coh901318.c | 8 ++------
drivers/dma/dw_dmac.c | 6 +-----
drivers/dma/fsldma.c | 6 +-----
drivers/dma/ioat/dma.h | 6 +-----
drivers/dma/iop-adma.c | 15 ++-------------
drivers/dma/ipu/ipu_idmac.c | 6 +-----
drivers/dma/mpc512x_dma.c | 7 +------
drivers/dma/mv_xor.c | 13 ++-----------
drivers/dma/ppc4xx/adma.c | 12 ++----------
drivers/dma/shdma.c | 7 +------
drivers/dma/timb_dma.c | 6 +-----
drivers/dma/txx9dmac.c | 6 +-----
include/linux/dmaengine.h | 10 ++++++++++
14 files changed, 27 insertions(+), 88 deletions(-)
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index ff75cf1..93ed99c 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -834,12 +834,7 @@ atc_tx_status(struct dma_chan *chan,
spin_unlock_bh(&atchan->lock);
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
-
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
dev_vdbg(chan2dev(chan), "tx_status: %d (d%d, u%d)\n",
cookie, last_complete ? last_complete : 0,
last_used ? last_used : 0);
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 309db3b..4233440 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1147,12 +1147,8 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
ret = dma_async_is_complete(cookie, last_complete, last_used);
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = coh901318_get_bytes_left(chan);
- }
-
+ dma_set_tx_state(txstate, last_complete, last_used,
+ coh901318_get_bytes_left(chan));
if (ret == DMA_IN_PROGRESS && cohc->stopped)
ret = DMA_PAUSED;
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 263b70e..18fb5b4 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -841,11 +841,7 @@ dwc_tx_status(struct dma_chan *chan,
ret = dma_async_is_complete(cookie, last_complete, last_used);
}
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return ret;
}
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index ca5e8a3..cb1924f 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -987,11 +987,7 @@ static enum dma_status fsl_tx_status(struct dma_chan *dchan,
last_used = dchan->cookie;
last_complete = chan->completed_cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index 2339967..26f48ef 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -158,11 +158,7 @@ ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
last_used = c->cookie;
last_complete = chan->completed_cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index ee40dbb..e5d4b97 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -909,13 +909,7 @@ static enum dma_status iop_adma_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = iop_chan->completed_cookie;
-
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
-
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret == DMA_SUCCESS)
return ret;
@@ -924,12 +918,7 @@ static enum dma_status iop_adma_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = iop_chan->completed_cookie;
-
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index b9cef8b..246a614 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1651,11 +1651,7 @@ static enum dma_status idmac_tx_status(struct dma_chan *chan,
{
struct idmac_channel *ichan = to_idmac_chan(chan);
- if (txstate) {
- txstate->last = ichan->completed;
- txstate->used = chan->cookie;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, ichan->completed, chan->cookie, 0);
if (cookie != chan->cookie)
return DMA_ERROR;
return DMA_SUCCESS;
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index cb3a8e9..7a750b9 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -553,12 +553,7 @@ mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
last_complete = mchan->completed_cookie;
spin_unlock_irqrestore(&mchan->lock, flags);
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
-
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 79fb1de..4b8c1fc 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -826,11 +826,7 @@ static enum dma_status mv_xor_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = mv_chan->completed_cookie;
mv_chan->is_complete_cookie = cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret == DMA_SUCCESS) {
@@ -842,12 +838,7 @@ static enum dma_status mv_xor_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = mv_chan->completed_cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
-
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index d9a54c0..5558419 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -3951,11 +3951,7 @@ static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = ppc440spe_chan->completed_cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret == DMA_SUCCESS)
@@ -3966,11 +3962,7 @@ static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = ppc440spe_chan->completed_cookie;
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 8aeda9c..98f82cd 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -752,12 +752,7 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
last_complete = sh_chan->completed_cookie;
BUG_ON(last_complete < 0);
-
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
spin_lock_bh(&sh_chan->desc_lock);
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index 8fc2881..e20d5c1 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -527,11 +527,7 @@ static enum dma_status td_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
ret = dma_async_is_complete(cookie, last_complete, last_used);
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
dev_dbg(chan2dev(chan),
"%s: exit, ret: %d, last_complete: %d, last_used: %d\n",
diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index a44e422..e523737 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -990,11 +990,7 @@ txx9dmac_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
ret = dma_async_is_complete(cookie, last_complete, last_used);
}
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
+ dma_set_tx_state(txstate, last_complete, last_used, 0);
return ret;
}
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 55b08e8..50b7b3e 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -628,6 +628,16 @@ static inline enum dma_status dma_async_is_complete(dma_cookie_t cookie,
return DMA_IN_PROGRESS;
}
+static inline void
+dma_set_tx_state(struct dma_tx_state *st, dma_cookie_t last, dma_cookie_t used, u32 residue)
+{
+ if (st) {
+ st->last = last;
+ st->used = used;
+ st->residue = residue;
+ }
+}
+
enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie);
#ifdef CONFIG_DMA_ENGINE
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
--
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