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dmaengine: consolidate tx_status functions 

Now that we have the completed cookie in the dma_chan structure, we
can consolidate the tx_status functions by providing a function to set
the txstate structure and returning the DMA status.  We also provide
a separate helper to set the residue for cookies which are still in
progress.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Russell King - ARM Linux 2012-03-06 22:35:27 +00:00 committed by Vinod Koul
parent f7fbce07c6
commit 96a2af41c7
23 changed files with 92 additions and 234 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/dma/amba-pl08x.c
View File

@ -964,31 +964,17 @@ static enum dma_status pl08x_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status ret;
u32 bytesleft = 0;
last_used = plchan->chan.cookie;
last_complete = plchan->chan.completed_cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret == DMA_SUCCESS) {
dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
}
/*
* This cookie not complete yet
* Get number of bytes left in the active transactions and queue
*/
last_used = plchan->chan.cookie;
last_complete = plchan->chan.completed_cookie;
/* Get number of bytes left in the active transactions and queue */
bytesleft = pl08x_getbytes_chan(plchan);
dma_set_tx_state(txstate, last_complete, last_used,
bytesleft);
dma_set_residue(txstate, pl08x_getbytes_chan(plchan));
if (plchan->state == PL08X_CHAN_PAUSED)
return DMA_PAUSED;

16
drivers/dma/at_hdmac.c
View File

@ -996,26 +996,20 @@ atc_tx_status(struct dma_chan *chan,
spin_lock_irqsave(&atchan->lock, flags);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
atc_cleanup_descriptors(atchan);
ret = dma_cookie_status(chan, cookie, txstate);
}
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
}
spin_unlock_irqrestore(&atchan->lock, flags);
if (ret != DMA_SUCCESS)
dma_set_tx_state(txstate, last_complete, last_used,
atc_first_active(atchan)->len);
else
dma_set_tx_state(txstate, last_complete, last_used, 0);
dma_set_residue(txstate, atc_first_active(atchan)->len);
if (atc_chan_is_paused(atchan))
ret = DMA_PAUSED;

13
drivers/dma/coh901318.c
View File

@ -1151,17 +1151,12 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct coh901318_chan *cohc = to_coh901318_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_cookie_status(chan, cookie, txstate);
/* FIXME: should be conditional on ret != DMA_SUCCESS? */
dma_set_residue(txstate, coh901318_get_bytes_left(chan));
ret = dma_async_is_complete(cookie, last_complete, last_used);
dma_set_tx_state(txstate, last_complete, last_used,
coh901318_get_bytes_left(chan));
if (ret == DMA_IN_PROGRESS && cohc->stopped)
ret = DMA_PAUSED;

31
drivers/dma/dmaengine.h
View File

@ -45,4 +45,35 @@ static inline void dma_cookie_complete(struct dma_async_tx_descriptor *tx)
tx->cookie = 0;
}
/**
* dma_cookie_status - report cookie status
* @chan: dma channel
* @cookie: cookie we are interested in
* @state: dma_tx_state structure to return last/used cookies
*
* Report the status of the cookie, filling in the state structure if
* non-NULL. No locking is required.
*/
static inline enum dma_status dma_cookie_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *state)
{
dma_cookie_t used, complete;
used = chan->cookie;
complete = chan->completed_cookie;
barrier();
if (state) {
state->last = complete;
state->used = used;
state->residue = 0;
}
return dma_async_is_complete(cookie, complete, used);
}
static inline void dma_set_residue(struct dma_tx_state *state, u32 residue)
{
if (state)
state->residue = residue;
}
#endif

19
drivers/dma/dw_dmac.c
View File

@ -979,28 +979,17 @@ dwc_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
}
if (ret != DMA_SUCCESS)
dma_set_tx_state(txstate, last_complete, last_used,
dwc_first_active(dwc)->len);
else
dma_set_tx_state(txstate, last_complete, last_used, 0);
dma_set_residue(txstate, dwc_first_active(dwc)->len);
if (dwc->paused)
return DMA_PAUSED;

7
drivers/dma/ep93xx_dma.c
View File

@ -1241,18 +1241,13 @@ static enum dma_status ep93xx_dma_tx_status(struct dma_chan *chan,
struct dma_tx_state *state)
{
struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
dma_cookie_t last_used, last_completed;
enum dma_status ret;
unsigned long flags;
spin_lock_irqsave(&edmac->lock, flags);
last_used = chan->cookie;
last_completed = chan->completed_cookie;
ret = dma_cookie_status(chan, cookie, state);
spin_unlock_irqrestore(&edmac->lock, flags);
ret = dma_async_is_complete(cookie, last_completed, last_used);
dma_set_tx_state(state, last_completed, last_used, 0);
return ret;
}

11
drivers/dma/fsldma.c
View File

@ -978,19 +978,14 @@ static enum dma_status fsl_tx_status(struct dma_chan *dchan,
struct dma_tx_state *txstate)
{
struct fsldma_chan *chan = to_fsl_chan(dchan);
dma_cookie_t last_complete;
dma_cookie_t last_used;
enum dma_status ret;
unsigned long flags;
spin_lock_irqsave(&chan->desc_lock, flags);
last_complete = dchan->completed_cookie;
last_used = dchan->cookie;
ret = dma_cookie_status(dchan, cookie, txstate);
spin_unlock_irqrestore(&chan->desc_lock, flags);
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return ret;
}
/*----------------------------------------------------------------------------*/

11
drivers/dma/imx-dma.c
View File

@ -153,16 +153,7 @@ static enum dma_status imxdma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
dma_cookie_t last_used;
enum dma_status ret;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, chan->completed_cookie, last_used);
dma_set_tx_state(txstate, chan->completed_cookie, last_used, 0);
return ret;
return dma_cookie_status(chan, cookie, txstate);
}
static dma_cookie_t imxdma_tx_submit(struct dma_async_tx_descriptor *tx)

19
drivers/dma/intel_mid_dma.c
View File

@ -477,30 +477,17 @@ static enum dma_status intel_mid_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&midc->lock);
midc_scan_descriptors(to_middma_device(chan->device), midc);
spin_unlock_bh(&midc->lock);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
}
if (txstate) {
txstate->last = last_complete;
txstate->used = last_used;
txstate->residue = 0;
}
return ret;
}

8
drivers/dma/ioat/dma.c
View File

@ -729,13 +729,15 @@ ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
{
struct ioat_chan_common *chan = to_chan_common(c);
struct ioatdma_device *device = chan->device;
enum dma_status ret;
if (ioat_tx_status(c, cookie, txstate) == DMA_SUCCESS)
return DMA_SUCCESS;
ret = dma_cookie_status(c, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
device->cleanup_fn((unsigned long) c);
return ioat_tx_status(c, cookie, txstate);
return dma_cookie_status(c, cookie, txstate);
}
static void ioat1_dma_start_null_desc(struct ioat_dma_chan *ioat)

21
drivers/dma/ioat/dma.h
View File

@ -142,27 +142,6 @@ static inline struct ioat_dma_chan *to_ioat_chan(struct dma_chan *c)
return container_of(chan, struct ioat_dma_chan, base);
}
/**
* ioat_tx_status - poll the status of an ioat transaction
* @c: channel handle
* @cookie: transaction identifier
* @txstate: if set, updated with the transaction state
*/
static inline enum dma_status
ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
dma_cookie_t last_used;
dma_cookie_t last_complete;
last_used = c->cookie;
last_complete = c->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
/* wrapper around hardware descriptor format + additional software fields */
/**

8
drivers/dma/ioat/dma_v3.c
View File

@ -410,13 +410,15 @@ ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
enum dma_status ret;
if (ioat_tx_status(c, cookie, txstate) == DMA_SUCCESS)
return DMA_SUCCESS;
ret = dma_cookie_status(c, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
ioat3_cleanup(ioat);
return ioat_tx_status(c, cookie, txstate);
return dma_cookie_status(c, cookie, txstate);
}
static struct dma_async_tx_descriptor *

14
drivers/dma/iop-adma.c
View File

@ -894,24 +894,14 @@ static enum dma_status iop_adma_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status ret;
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
iop_adma_slot_cleanup(iop_chan);
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return dma_cookie_status(chan, cookie, txstate);
}
static irqreturn_t iop_adma_eot_handler(int irq, void *data)

9
drivers/dma/mpc512x_dma.c
View File

@ -557,17 +557,14 @@ mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
enum dma_status ret;
unsigned long flags;
dma_cookie_t last_used;
dma_cookie_t last_complete;
spin_lock_irqsave(&mchan->lock, flags);
last_used = mchan->chan.cookie;
last_complete = mchan->chan.completed_cookie;
ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irqrestore(&mchan->lock, flags);
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return ret;
}
/* Prepare descriptor for memory to memory copy */

14
drivers/dma/mv_xor.c
View File

@ -810,26 +810,16 @@ static enum dma_status mv_xor_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct mv_xor_chan *mv_chan = to_mv_xor_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status ret;
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS) {
mv_xor_clean_completed_slots(mv_chan);
return ret;
}
mv_xor_slot_cleanup(mv_chan);
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return dma_cookie_status(chan, cookie, txstate);
}
static void mv_dump_xor_regs(struct mv_xor_chan *chan)

11
drivers/dma/pch_dma.c
View File

@ -565,19 +565,12 @@ static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct pch_dma_chan *pd_chan = to_pd_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_completed;
int ret;
enum dma_status ret;
spin_lock_irq(&pd_chan->lock);
last_completed = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irq(&pd_chan->lock);
ret = dma_async_is_complete(cookie, last_completed, last_used);
dma_set_tx_state(txstate, last_completed, last_used, 0);
return ret;
}

13
drivers/dma/pl330.c
View File

@ -395,18 +395,7 @@ static enum dma_status
pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct dma_pl330_chan *pch = to_pchan(chan);
dma_cookie_t last_done, last_used;
int ret;
last_done = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_done, last_used);
dma_set_tx_state(txstate, last_done, last_used, 0);
return ret;
return dma_cookie_status(chan, cookie, txstate);
}
static void pl330_issue_pending(struct dma_chan *chan)

16
drivers/dma/ppc4xx/adma.c
View File

@ -3928,28 +3928,16 @@ static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct ppc440spe_adma_chan *ppc440spe_chan;
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status ret;
ppc440spe_chan = to_ppc440spe_adma_chan(chan);
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
ppc440spe_adma_slot_cleanup(ppc440spe_chan);
last_used = chan->cookie;
last_complete = chan->completed_cookie;
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return dma_cookie_status(chan, cookie, txstate);
}
/**

11
drivers/dma/shdma.c
View File

@ -879,23 +879,14 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status status;
unsigned long flags;
sh_dmae_chan_ld_cleanup(sh_chan, false);
/* First read completed cookie to avoid a skew */
last_complete = chan->completed_cookie;
rmb();
last_used = chan->cookie;
BUG_ON(last_complete < 0);
dma_set_tx_state(txstate, last_complete, last_used, 0);
spin_lock_irqsave(&sh_chan->desc_lock, flags);
status = dma_async_is_complete(cookie, last_complete, last_used);
status = dma_cookie_status(chan, cookie, txstate);
/*
* If we don't find cookie on the queue, it has been aborted and we have

9
drivers/dma/sirf-dma.c
View File

@ -407,16 +407,13 @@ sirfsoc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
unsigned long flags;
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status ret;
spin_lock_irqsave(&schan->lock, flags);
last_used = schan->chan.cookie;
last_complete = schan->chan.completed_cookie;
ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irqrestore(&schan->lock, flags);
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
return ret;
}
static struct dma_async_tx_descriptor *sirfsoc_dma_prep_interleaved(

14
drivers/dma/ste_dma40.c
View File

@ -2332,25 +2332,19 @@ static enum dma_status d40_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
if (d40c->phy_chan == NULL) {
chan_err(d40c, "Cannot read status of unallocated channel\n");
return -EINVAL;
}
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS)
dma_set_residue(txstate, stedma40_residue(chan));
if (d40_is_paused(d40c))
ret = DMA_PAUSED;
else
ret = dma_async_is_complete(cookie, last_complete, last_used);
dma_set_tx_state(txstate, last_complete, last_used,
stedma40_residue(chan));
return ret;
}

11
drivers/dma/timb_dma.c
View File

@ -513,18 +513,11 @@ static enum dma_status td_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
{
struct timb_dma_chan *td_chan =
container_of(chan, struct timb_dma_chan, chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
dev_dbg(chan2dev(chan), "%s: Entry\n", __func__);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
dma_set_tx_state(txstate, last_complete, last_used, 0);
ret = dma_cookie_status(chan, cookie, txstate);
dev_dbg(chan2dev(chan),
"%s: exit, ret: %d, last_complete: %d, last_used: %d\n",

16
drivers/dma/txx9dmac.c
View File

@ -959,27 +959,17 @@ txx9dmac_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct txx9dmac_chan *dc = to_txx9dmac_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
int ret;
enum dma_status ret;
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&dc->lock);
txx9dmac_scan_descriptors(dc);
spin_unlock_bh(&dc->lock);
last_complete = chan->completed_cookie;
last_used = chan->cookie;
ret = dma_async_is_complete(cookie, last_complete, last_used);
ret = dma_cookie_status(chan, cookie, txstate);
}
dma_set_tx_state(txstate, last_complete, last_used, 0);
return ret;
}