148 lines
4.3 KiB
Diff
148 lines
4.3 KiB
Diff
From b84c7f48996a9bbacdddcef9929405f674a73a81 Mon Sep 17 00:00:00 2001
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From: Guiding Li <liguiding@pinecone.net>
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Date: Wed, 20 Feb 2019 11:36:57 +0800
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Subject: [PATCH 3/3] rpmsg: wait endpoint ready in rpmsg_send and
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rpmsg_send_nocopy
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because the remote need time to return the destination address
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Signed-off-by: Guiding Li <liguiding@pinecone.net>
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---
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lib/include/openamp/rpmsg.h | 59 ++++++++++++++++++++++++++-----------
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lib/rpmsg/rpmsg_virtio.c | 7 -----
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2 files changed, 42 insertions(+), 24 deletions(-)
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diff --git a/lib/include/openamp/rpmsg.h open-amp/lib/include/openamp/rpmsg.h
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index efdfb2b..5c8b45c 100644
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--- a/lib/include/openamp/rpmsg.h
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+++ open-amp/lib/include/openamp/rpmsg.h
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@@ -15,6 +15,7 @@
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#include <metal/compiler.h>
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#include <metal/mutex.h>
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#include <metal/list.h>
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+#include <metal/sleep.h>
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#include <metal/utilities.h>
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#include <string.h>
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#include <stdbool.h>
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@@ -32,6 +33,12 @@ extern "C" {
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#define RPMSG_RESERVED_ADDRESSES (1024)
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#define RPMSG_ADDR_ANY 0xFFFFFFFF
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+/* Total tick count for 15secs - 1usec tick. */
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+#define RPMSG_TICK_COUNT 15000000
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+
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+/* Time to wait - In multiple of 1 msecs. */
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+#define RPMSG_TICKS_PER_INTERVAL 1000
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+
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/* Error macros. */
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#define RPMSG_SUCCESS 0
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#define RPMSG_ERROR_BASE -2000
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@@ -141,6 +148,19 @@ int rpmsg_send_offchannel_raw(struct rpmsg_endpoint *ept, uint32_t src,
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uint32_t dst, const void *data, int len,
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int wait);
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+/**
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+ * is_rpmsg_ept_ready - check if the rpmsg endpoint ready to send
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+ *
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+ * @ept: pointer to rpmsg endpoint
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+ *
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+ * Returns 1 if the rpmsg endpoint has both local addr and destination
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+ * addr set, 0 otherwise
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+ */
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+static inline unsigned int is_rpmsg_ept_ready(struct rpmsg_endpoint *ept)
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+{
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+ return ept && ept->rdev && ept->dest_addr != RPMSG_ADDR_ANY;
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+}
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+
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/**
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* rpmsg_send() - send a message across to the remote processor
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* @ept: the rpmsg endpoint
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@@ -159,8 +179,17 @@ int rpmsg_send_offchannel_raw(struct rpmsg_endpoint *ept, uint32_t src,
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static inline int rpmsg_send(struct rpmsg_endpoint *ept, const void *data,
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int len)
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{
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- return rpmsg_send_offchannel_raw(ept, ept->addr, ept->dest_addr, data,
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- len, true);
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+ int tc = 0;
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+
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+ for (; tc < RPMSG_TICK_COUNT; tc += RPMSG_TICKS_PER_INTERVAL) {
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+ if (is_rpmsg_ept_ready(ept))
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+ return rpmsg_send_offchannel_raw(ept, ept->addr,
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+ ept->dest_addr,
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+ data, len, true);
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+ metal_sleep_usec(RPMSG_TICKS_PER_INTERVAL);
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+ }
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+
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+ return RPMSG_ERR_ADDR;
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}
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/**
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@@ -433,8 +462,17 @@ static inline int rpmsg_sendto_nocopy(struct rpmsg_endpoint *ept,
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static inline int rpmsg_send_nocopy(struct rpmsg_endpoint *ept,
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const void *data, int len)
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{
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- return rpmsg_send_offchannel_nocopy(ept, ept->addr,
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- ept->dest_addr, data, len);
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+ int tc = 0;
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+
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+ for (; tc < RPMSG_TICK_COUNT; tc += RPMSG_TICKS_PER_INTERVAL) {
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+ if (is_rpmsg_ept_ready(ept))
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+ return rpmsg_send_offchannel_nocopy(ept, ept->addr,
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+ ept->dest_addr,
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+ data, len);
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+ metal_sleep_usec(RPMSG_TICKS_PER_INTERVAL);
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+ }
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+
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+ return RPMSG_ERR_ADDR;
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}
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/**
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@@ -507,19 +545,6 @@ int rpmsg_create_ept(struct rpmsg_endpoint *ept, struct rpmsg_device *rdev,
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*/
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void rpmsg_destroy_ept(struct rpmsg_endpoint *ept);
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-/**
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- * is_rpmsg_ept_ready - check if the rpmsg endpoint ready to send
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- *
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- * @ept: pointer to rpmsg endpoint
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- *
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- * Returns 1 if the rpmsg endpoint has both local addr and destination
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- * addr set, 0 otherwise
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- */
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-static inline unsigned int is_rpmsg_ept_ready(struct rpmsg_endpoint *ept)
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-{
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- return ept && ept->rdev && ept->dest_addr != RPMSG_ADDR_ANY;
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-}
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-
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#if defined __cplusplus
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}
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#endif
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diff --git a/lib/rpmsg/rpmsg_virtio.c open-amp/lib/rpmsg/rpmsg_virtio.c
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index 164dc70..c357ba8 100644
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--- a/lib/rpmsg/rpmsg_virtio.c
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+++ open-amp/lib/rpmsg/rpmsg_virtio.c
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@@ -8,7 +8,6 @@
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*/
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#include <metal/alloc.h>
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-#include <metal/sleep.h>
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#include <metal/utilities.h>
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#include <openamp/rpmsg_virtio.h>
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#include <openamp/virtqueue.h>
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@@ -17,12 +16,6 @@
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#define RPMSG_NUM_VRINGS 2
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-/* Total tick count for 15secs - 1usec tick. */
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-#define RPMSG_TICK_COUNT 15000000
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-
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-/* Time to wait - In multiple of 1 msecs. */
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-#define RPMSG_TICKS_PER_INTERVAL 1000
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-
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#ifndef VIRTIO_SLAVE_ONLY
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metal_weak void *
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rpmsg_virtio_shm_pool_get_buffer(struct rpmsg_virtio_shm_pool *shpool,
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--
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2.17.1
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