[RFC PATCH 1/6] soc: ti: k3-ringacc: Add helper to get realtime count of free elements
From: Siddharth Vadapalli <s-vadapalli@ti.com>
Date: 2026-03-25 12:37:06
Also in:
dmaengine, linux-arm-kernel, lkml
Subsystem:
the rest, ti keystone multicore navigator drivers · Maintainers:
Linus Torvalds, Nishanth Menon, Santosh Shilimkar
The existing helper k3_ringacc_ring_get_free() updates the count of free elements only when the software maintained counter decrements to zero. As a result, for batch processing, we may read a lower count of free elements than the actual count. To address this, introduce a new helper that provides realtime count of free elements. Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> --- drivers/soc/ti/k3-ringacc.c | 11 +++++++++++ include/linux/soc/ti/k3-ringacc.h | 8 ++++++++ 2 files changed, 19 insertions(+)
diff --git a/drivers/soc/ti/k3-ringacc.c b/drivers/soc/ti/k3-ringacc.c
index 7602b8a909b0..1751d42ee2d3 100644
--- a/drivers/soc/ti/k3-ringacc.c
+++ b/drivers/soc/ti/k3-ringacc.c@@ -905,6 +905,17 @@ u32 k3_ringacc_ring_get_free(struct k3_ring *ring) } EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_free); +u32 k3_ringacc_ring_get_rt_free(struct k3_ring *ring) +{ + if (!ring || !(ring->flags & K3_RING_FLAG_BUSY)) + return -EINVAL; + + ring->state.free = ring->size - k3_ringacc_ring_read_occ(ring); + + return ring->state.free; +} +EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_rt_free); + u32 k3_ringacc_ring_get_occ(struct k3_ring *ring) { if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
diff --git a/include/linux/soc/ti/k3-ringacc.h b/include/linux/soc/ti/k3-ringacc.h
index 39b022b92598..091cf551932d 100644
--- a/include/linux/soc/ti/k3-ringacc.h
+++ b/include/linux/soc/ti/k3-ringacc.h@@ -184,6 +184,14 @@ u32 k3_ringacc_ring_get_size(struct k3_ring *ring); */ u32 k3_ringacc_ring_get_free(struct k3_ring *ring); +/** + * k3_ringacc_ring_get_rt_free - get realtime value of free elements + * @ring: pointer on ring + * + * Returns realtime count of free elements in the ring. + */ +u32 k3_ringacc_ring_get_rt_free(struct k3_ring *ring); + /** * k3_ringacc_ring_get_occ - get ring occupancy * @ring: pointer on ring
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2.51.1