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ranchuan
202
source/OpenAMP/open-amp/apps/examples/echo/rpmsg-ping.c
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202
source/OpenAMP/open-amp/apps/examples/echo/rpmsg-ping.c
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/* This is a sample demonstration application that showcases usage of rpmsg
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This application is meant to run on the remote CPU running baremetal code.
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This application echoes back data that was sent to it by the master core. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <openamp/open_amp.h>
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#include <metal/alloc.h>
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#include "platform_info.h"
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#include "rpmsg-echo.h"
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#define APP_EPT_ADDR 0
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#define LPRINTF(format, ...) printf(format, ##__VA_ARGS__)
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#define LPERROR(format, ...) LPRINTF("ERROR: " format, ##__VA_ARGS__)
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struct _payload {
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unsigned long num;
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unsigned long size;
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unsigned char data[];
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};
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static int err_cnt;
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#define PAYLOAD_MIN_SIZE 1
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/* Globals */
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static struct rpmsg_endpoint lept;
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static struct _payload *i_payload;
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static int rnum = 0;
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static int err_cnt = 0;
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static int ept_deleted = 0;
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/*-----------------------------------------------------------------------------*
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* RPMSG endpoint callbacks
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*-----------------------------------------------------------------------------*/
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static int rpmsg_endpoint_cb(struct rpmsg_endpoint *ept, void *data, size_t len,
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uint32_t src, void *priv)
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{
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int i;
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struct _payload *r_payload = (struct _payload *)data;
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(void)ept;
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(void)src;
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(void)priv;
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LPRINTF(" received payload number %lu of size %lu \r\n",
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r_payload->num, (unsigned long)len);
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if (r_payload->size == 0) {
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LPERROR(" Invalid size of package is received.\n");
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err_cnt++;
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return RPMSG_SUCCESS;
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}
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/* Validate data buffer integrity. */
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for (i = 0; i < (int)r_payload->size; i++) {
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if (r_payload->data[i] != 0xA5) {
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LPRINTF("Data corruption at index %d\n", i);
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err_cnt++;
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break;
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}
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}
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rnum = r_payload->num + 1;
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return RPMSG_SUCCESS;
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}
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static void rpmsg_service_unbind(struct rpmsg_endpoint *ept)
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{
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(void)ept;
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rpmsg_destroy_ept(&lept);
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LPRINTF("echo test: service is destroyed\n");
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ept_deleted = 1;
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}
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static void rpmsg_name_service_bind_cb(struct rpmsg_device *rdev,
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const char *name, uint32_t dest)
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{
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LPRINTF("new endpoint notification is received.\n");
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if (strcmp(name, RPMSG_SERVICE_NAME))
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LPERROR("Unexpected name service %s.\n", name);
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else
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(void)rpmsg_create_ept(&lept, rdev, RPMSG_SERVICE_NAME,
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APP_EPT_ADDR, dest,
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rpmsg_endpoint_cb,
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rpmsg_service_unbind);
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}
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/*-----------------------------------------------------------------------------*
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* Application
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*-----------------------------------------------------------------------------*/
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int app (struct rpmsg_device *rdev, void *priv)
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{
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int ret;
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int i;
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int size, max_size, num_payloads;
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int expect_rnum = 0;
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LPRINTF(" 1 - Send data to remote core, retrieve the echo");
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LPRINTF(" and validate its integrity ..\n");
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max_size = rpmsg_virtio_get_buffer_size(rdev);
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if (max_size < 0) {
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LPERROR("No avaiable buffer size.\n");
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return -1;
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}
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max_size -= sizeof(struct _payload);
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num_payloads = max_size - PAYLOAD_MIN_SIZE + 1;
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i_payload =
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(struct _payload *)metal_allocate_memory(2 * sizeof(unsigned long) +
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max_size);
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if (!i_payload) {
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LPERROR("memory allocation failed.\n");
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return -1;
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}
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/* Create RPMsg endpoint */
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ret = rpmsg_create_ept(&lept, rdev, RPMSG_SERVICE_NAME, APP_EPT_ADDR,
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RPMSG_ADDR_ANY,
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rpmsg_endpoint_cb, rpmsg_service_unbind);
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if (ret) {
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LPERROR("Failed to create RPMsg endpoint.\n");
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return ret;
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}
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while (!is_rpmsg_ept_ready(&lept))
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platform_poll(priv);
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LPRINTF("RPMSG endpoint is binded with remote.\n");
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for (i = 0, size = PAYLOAD_MIN_SIZE; i < num_payloads; i++, size++) {
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i_payload->num = i;
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i_payload->size = size;
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/* Mark the data buffer. */
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memset(&(i_payload->data[0]), 0xA5, size);
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LPRINTF("sending payload number %lu of size %lu\n",
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i_payload->num,
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(unsigned long)(2 * sizeof(unsigned long)) + size);
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ret = rpmsg_send(&lept, i_payload,
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(2 * sizeof(unsigned long)) + size);
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if (ret < 0) {
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LPERROR("Failed to send data...\n");
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break;
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}
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LPRINTF("echo test: sent : %lu\n",
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(unsigned long)(2 * sizeof(unsigned long)) + size);
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expect_rnum++;
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do {
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platform_poll(priv);
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} while ((rnum < expect_rnum) && !err_cnt && !ept_deleted);
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}
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LPRINTF("**********************************\n");
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LPRINTF(" Test Results: Error count = %d \n", err_cnt);
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LPRINTF("**********************************\n");
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/* Destroy the RPMsg endpoint */
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rpmsg_destroy_ept(&lept);
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LPRINTF("Quitting application .. Echo test end\n");
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metal_free_memory(i_payload);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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void *platform;
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struct rpmsg_device *rpdev;
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int ret;
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/* Initialize platform */
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ret = platform_init(argc, argv, &platform);
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if (ret) {
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LPERROR("Failed to initialize platform.\n");
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ret = -1;
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} else {
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rpdev = platform_create_rpmsg_vdev(platform, 0,
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VIRTIO_DEV_MASTER,
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NULL,
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rpmsg_name_service_bind_cb);
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if (!rpdev) {
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LPERROR("Failed to create rpmsg virtio device.\n");
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ret = -1;
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} else {
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app(rpdev, platform);
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platform_release_rpmsg_vdev(rpdev);
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ret = 0;
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}
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}
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LPRINTF("Stopping application...\n");
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platform_cleanup(platform);
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return ret;
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}
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