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[2/6] soc: ti: k3-ringacc: Add an API to request pair of rings

Message ID 20200706075627.17212-3-vigneshr@ti.com
State Accepted
Commit 5d257849987fbeab96bf8cd953cab7c825a9b359
Headers show
Series TI: AM654/j721e: Ringacc and UDMA updates | expand

Commit Message

Vignesh Raghavendra July 6, 2020, 7:56 a.m. UTC 
Add new API k3_ringacc_request_rings_pair() to request pair of rings at
once, as in the most case Rings are used with DMA channels which required
to request pair of rings - one to feed DMA with descriptors (TX/RX FDQ) and
one to receive completions (RX/TX CQ). This will allow to simplify Ringacc
API users.

Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
---
 drivers/soc/ti/k3-navss-ringacc.c       | 23 +++++++++++++++++++++++
 include/linux/soc/ti/k3-navss-ringacc.h |  4 ++++
 2 files changed, 27 insertions(+)
diff mbox series

Patch

diff --git a/drivers/soc/ti/k3-navss-ringacc.c b/drivers/soc/ti/k3-navss-ringacc.c
index f31ffaf5ae..81de75af20 100644
--- a/drivers/soc/ti/k3-navss-ringacc.c
+++ b/drivers/soc/ti/k3-navss-ringacc.c
@@ -321,6 +321,29 @@  error:
 	return NULL;
 }
 
+int k3_nav_ringacc_request_rings_pair(struct k3_nav_ringacc *ringacc,
+				      int fwd_id, int compl_id,
+				      struct k3_nav_ring **fwd_ring,
+				      struct k3_nav_ring **compl_ring)
+{
+	int ret = 0;
+
+	if (!fwd_ring || !compl_ring)
+		return -EINVAL;
+
+	*fwd_ring = k3_nav_ringacc_request_ring(ringacc, fwd_id, 0);
+	if (!(*fwd_ring))
+		return -ENODEV;
+
+	*compl_ring = k3_nav_ringacc_request_ring(ringacc, compl_id, 0);
+	if (!(*compl_ring)) {
+		k3_nav_ringacc_ring_free(*fwd_ring);
+		ret = -ENODEV;
+	}
+
+	return ret;
+}
+
 static void k3_ringacc_ring_reset_sci(struct k3_nav_ring *ring)
 {
 	struct k3_nav_ringacc *ringacc = ring->parent;
diff --git a/include/linux/soc/ti/k3-navss-ringacc.h b/include/linux/soc/ti/k3-navss-ringacc.h
index 7b027f8bd4..9176277ff0 100644
--- a/include/linux/soc/ti/k3-navss-ringacc.h
+++ b/include/linux/soc/ti/k3-navss-ringacc.h
@@ -100,6 +100,10 @@  struct k3_nav_ring_cfg {
 struct k3_nav_ring *k3_nav_ringacc_request_ring(struct k3_nav_ringacc *ringacc,
 						int id, u32 flags);
 
+int k3_nav_ringacc_request_rings_pair(struct k3_nav_ringacc *ringacc,
+				      int fwd_id, int compl_id,
+				      struct k3_nav_ring **fwd_ring,
+				      struct k3_nav_ring **compl_ring);
 /**
  * k3_nav_ringacc_get_dev - get pointer on RA device
  * @ringacc: pointer on RA