diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 92 |
1 files changed, 50 insertions, 42 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index d9dfda2c65b5..4ec96ac1e41a 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -521,54 +521,62 @@ static void d40_phy_lli_load(struct d40_chan *chan, struct d40_desc *desc) writel(lli_dst->reg_lnk, base + D40_CHAN_REG_SDLNK); } -static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d) -{ - int curr_lcla = -EINVAL, next_lcla; - - if (chan_is_physical(d40c)) { - d40_phy_lli_load(d40c, d40d); - d40d->lli_current = d40d->lli_len; - } else { - - if ((d40d->lli_len - d40d->lli_current) > 1) - curr_lcla = d40_lcla_alloc_one(d40c, d40d); - - d40_log_lli_lcpa_write(d40c->lcpa, - &d40d->lli_log.dst[d40d->lli_current], - &d40d->lli_log.src[d40d->lli_current], - curr_lcla); - - d40d->lli_current++; - for (; d40d->lli_current < d40d->lli_len; d40d->lli_current++) { - unsigned int lcla_offset = d40c->phy_chan->num * 1024 + - 8 * curr_lcla * 2; - struct d40_lcla_pool *pool = &d40c->base->lcla_pool; - struct d40_log_lli *lcla = pool->base + lcla_offset; - - if (d40d->lli_current + 1 < d40d->lli_len) - next_lcla = d40_lcla_alloc_one(d40c, d40d); - else - next_lcla = -EINVAL; - - d40_log_lli_lcla_write(lcla, - &d40d->lli_log.dst[d40d->lli_current], - &d40d->lli_log.src[d40d->lli_current], - next_lcla); +static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc) +{ + struct d40_lcla_pool *pool = &chan->base->lcla_pool; + struct d40_log_lli_bidir *lli = &desc->lli_log; + int lli_current = desc->lli_current; + int lli_len = desc->lli_len; + int curr_lcla = -EINVAL; + + if (lli_len - lli_current > 1) + curr_lcla = d40_lcla_alloc_one(chan, desc); + + d40_log_lli_lcpa_write(chan->lcpa, + &lli->dst[lli_current], + &lli->src[lli_current], + curr_lcla); + + lli_current++; + for (; lli_current < lli_len; lli_current++) { + unsigned int lcla_offset = chan->phy_chan->num * 1024 + + 8 * curr_lcla * 2; + struct d40_log_lli *lcla = pool->base + lcla_offset; + int next_lcla; + + if (lli_current + 1 < lli_len) + next_lcla = d40_lcla_alloc_one(chan, desc); + else + next_lcla = -EINVAL; - dma_sync_single_range_for_device(d40c->base->dev, - pool->dma_addr, lcla_offset, - 2 * sizeof(struct d40_log_lli), - DMA_TO_DEVICE); + d40_log_lli_lcla_write(lcla, + &lli->dst[lli_current], + &lli->src[lli_current], + next_lcla); - curr_lcla = next_lcla; + dma_sync_single_range_for_device(chan->base->dev, + pool->dma_addr, lcla_offset, + 2 * sizeof(struct d40_log_lli), + DMA_TO_DEVICE); - if (curr_lcla == -EINVAL) { - d40d->lli_current++; - break; - } + curr_lcla = next_lcla; + if (curr_lcla == -EINVAL) { + lli_current++; + break; } } + + desc->lli_current = lli_current; +} + +static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d) +{ + if (chan_is_physical(d40c)) { + d40_phy_lli_load(d40c, d40d); + d40d->lli_current = d40d->lli_len; + } else + d40_log_lli_to_lcxa(d40c, d40d); } static struct d40_desc *d40_first_active_get(struct d40_chan *d40c) |