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dmaengine: ti: k3-udma: Remove dma_sync_single calls for descriptors

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The descriptors are allocated via wither dma_pool or dma_alloc_coherent.

There is no need for the dma_sync_singel_* calls.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20200707102352.28773-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Ujfalusi 2020-07-07 13:23:48 +03:00 committed by Vinod Koul
parent d6a7bb869d
commit 2166d96029
1 changed files with 2 additions and 35 deletions
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37
drivers/dma/ti/k3-udma.c
View file

@ -539,30 +539,6 @@ static bool udma_is_chan_paused(struct udma_chan *uc)
return false;
}
static void udma_sync_for_device(struct udma_chan *uc, int idx)
{
struct udma_desc *d = uc->desc;
if (uc->cyclic && uc->config.pkt_mode) {
dma_sync_single_for_device(uc->ud->dev,
d->hwdesc[idx].cppi5_desc_paddr,
d->hwdesc[idx].cppi5_desc_size,
DMA_TO_DEVICE);
} else {
int i;
for (i = 0; i < d->hwdesc_count; i++) {
if (!d->hwdesc[i].cppi5_desc_vaddr)
continue;
dma_sync_single_for_device(uc->ud->dev,
d->hwdesc[i].cppi5_desc_paddr,
d->hwdesc[i].cppi5_desc_size,
DMA_TO_DEVICE);
}
}
}
static inline dma_addr_t udma_get_rx_flush_hwdesc_paddr(struct udma_chan *uc)
{
return uc->ud->rx_flush.hwdescs[uc->config.pkt_mode].cppi5_desc_paddr;
@ -593,7 +569,6 @@ static int udma_push_to_ring(struct udma_chan *uc, int idx)
paddr = udma_curr_cppi5_desc_paddr(d, idx);
wmb(); /* Ensure that writes are not moved over this point */
udma_sync_for_device(uc, idx);
}
return k3_ringacc_ring_push(ring, &paddr);
@ -628,12 +603,12 @@ static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
}
if (ring && k3_ringacc_ring_get_occ(ring)) {
struct udma_desc *d = NULL;
ret = k3_ringacc_ring_pop(ring, addr);
if (ret)
return ret;
rmb(); /* Ensure that reads are not moved before this point */
/* Teardown completion */
if (cppi5_desc_is_tdcm(*addr))
return ret;
@ -641,14 +616,6 @@ static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
/* Check for flush descriptor */
if (udma_desc_is_rx_flush(uc, *addr))
return -ENOENT;
d = udma_udma_desc_from_paddr(uc, *addr);
if (d)
dma_sync_single_for_cpu(uc->ud->dev, *addr,
d->hwdesc[0].cppi5_desc_size,
DMA_FROM_DEVICE);
rmb(); /* Ensure that reads are not moved before this point */
}
return ret;