From 2166d96029bc88a90f431aca7f51e714c653e027 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Tue, 7 Jul 2020 13:23:48 +0300 Subject: [PATCH] dmaengine: ti: k3-udma: Remove dma_sync_single calls for descriptors 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 Reviewed-by: Grygorii Strashko Link: https://lore.kernel.org/r/20200707102352.28773-2-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul --- drivers/dma/ti/k3-udma.c | 37 ++----------------------------------- 1 file changed, 2 insertions(+), 35 deletions(-) diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 945b7c6..f5c1373 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -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; -- 2.7.4