From 9d32a94bce5e5a184eff0fbef860c1bbc87cd3a0 Mon Sep 17 00:00:00 2001 From: Vignesh Raghavendra <vigneshr@ti.com> Date: Mon, 9 Dec 2019 10:25:33 +0530 Subject: [PATCH] soc: ti: k3-navss-ringacc: Flush/invalidate caches on ring push/pop Flush caches when pushing an element to ring and invalidate caches when popping an element from ring in Exposed Ring mode. Otherwise DMA transfers don't work properly in R5 SPL (with caches enabled) where the core is not in coherency domain. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> --- drivers/soc/ti/k3-navss-ringacc.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/soc/ti/k3-navss-ringacc.c b/drivers/soc/ti/k3-navss-ringacc.c index 64ebc0ba00..f06ea29c98 100644 --- a/drivers/soc/ti/k3-navss-ringacc.c +++ b/drivers/soc/ti/k3-navss-ringacc.c @@ -6,6 +6,7 @@ */ #include <common.h> +#include <cpu_func.h> #include <asm/io.h> #include <malloc.h> #include <asm/dma-mapping.h> @@ -807,6 +808,11 @@ static int k3_nav_ringacc_ring_push_mem(struct k3_nav_ring *ring, void *elem) memcpy(elem_ptr, elem, (4 << ring->elm_size)); + flush_dcache_range((unsigned long)ring->ring_mem_virt, + ALIGN((unsigned long)ring->ring_mem_virt + + ring->size * (4 << ring->elm_size), + ARCH_DMA_MINALIGN)); + ring->windex = (ring->windex + 1) % ring->size; ring->free--; ringacc_writel(1, &ring->rt->db); @@ -823,6 +829,11 @@ static int k3_nav_ringacc_ring_pop_mem(struct k3_nav_ring *ring, void *elem) elem_ptr = k3_nav_ringacc_get_elm_addr(ring, ring->rindex); + invalidate_dcache_range((unsigned long)ring->ring_mem_virt, + ALIGN((unsigned long)ring->ring_mem_virt + + ring->size * (4 << ring->elm_size), + ARCH_DMA_MINALIGN)); + memcpy(elem, elem_ptr, (4 << ring->elm_size)); ring->rindex = (ring->rindex + 1) % ring->size; -- 2.39.5