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dmaengine: pl330: add burst mode according to dts config

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Default is single mode, but some socs only support burst
mode. What's more, burst mode can improve memory accessing
efficiency.
In pl330 dts node:
Add peripherals_req_type_burst to enable burst mode.

Change-Id: I9c7ade28ef6901a746e53ee1cefeec55c8b24340
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
This commit is contained in:
Huibin Hong 2016-06-02 19:45:36 +08:00 committed by Gerrit Code Review
parent 71cc2e7721
commit 8e770f371c
1 changed files with 22 additions and 14 deletions
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36
drivers/dma/pl330.c
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@ -491,6 +491,8 @@ struct pl330_dmac {
/* Peripheral channels connected to this DMAC */
unsigned int num_peripherals;
struct dma_pl330_chan *peripherals; /* keep at end */
/* set peripherals request type according to soc config*/
enum pl330_cond peripherals_req_type;
int quirks;
};
@ -1156,12 +1158,7 @@ static inline int _ldst_devtomem(struct pl330_dmac *pl330, unsigned dry_run,
int cyc)
{
int off = 0;
enum pl330_cond cond;
if (pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
cond = BURST;
else
cond = SINGLE;
enum pl330_cond cond = pl330->peripherals_req_type;
while (cyc--) {
off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
@ -1181,12 +1178,7 @@ static inline int _ldst_memtodev(struct pl330_dmac *pl330,
const struct _xfer_spec *pxs, int cyc)
{
int off = 0;
enum pl330_cond cond;
if (pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP)
cond = BURST;
else
cond = SINGLE;
enum pl330_cond cond = pl330->peripherals_req_type;
while (cyc--) {
off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
@ -2597,7 +2589,12 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
desc->rqtype = direction;
desc->rqcfg.brst_size = pch->burst_sz;
desc->rqcfg.brst_len = 1;
if (pl330->peripherals_req_type == BURST)
desc->rqcfg.brst_len = pch->burst_len;
else
desc->rqcfg.brst_len = 1;
desc->bytes_requested = period_len;
fill_px(&desc->px, dst, src, period_len);
@ -2699,6 +2696,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
{
struct dma_pl330_desc *first, *desc = NULL;
struct dma_pl330_chan *pch = to_pchan(chan);
struct pl330_dmac *pl330 = pch->dmac;
struct scatterlist *sg;
int i;
dma_addr_t addr;
@ -2742,7 +2740,12 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
}
desc->rqcfg.brst_size = pch->burst_sz;
desc->rqcfg.brst_len = 1;
if (pl330->peripherals_req_type == BURST)
desc->rqcfg.brst_len = pch->burst_len;
else
desc->rqcfg.brst_len = 1;
desc->rqtype = direction;
desc->bytes_requested = sg_dma_len(sg);
}
@ -2838,6 +2841,11 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
pl330->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
if (of_find_property(np, "peripherals-req-type-burst", NULL))
pl330->peripherals_req_type = BURST;
else
pl330->peripherals_req_type = SINGLE;
/* get quirk */
for (i = 0; i < ARRAY_SIZE(of_quirks); i++)
if (of_property_read_bool(np, of_quirks[i].quirk))