static void push_resp () {
if (status.first_resp == NULL)
return;
if (psl_response (status.event, status.first_resp->tag,
status.first_resp->code, 1, 0, 0) == PSL_SUCCESS) {
struct afu_resp *temp;
temp = status.first_resp;
status.first_resp = status.first_resp->_next;
if (status.first_resp == NULL) {
status.last_resp = NULL;
}
free (temp);
}
}
// Send a randomly selected pending response back to AFU
void handle_response(struct cmd *cmd)
{
struct cmd_event **head;
struct cmd_event *event;
struct client *client;
int rc;
// Select a random pending response (or none)
client = NULL;
head = &cmd->list;
while (*head != NULL) {
// Fast track error responses
if (((*head)->resp == PSL_RESPONSE_PAGED) ||
((*head)->resp == PSL_RESPONSE_NRES) ||
((*head)->resp == PSL_RESPONSE_NLOCK) ||
((*head)->resp == PSL_RESPONSE_FAILED) ||
((*head)->resp == PSL_RESPONSE_FLUSHED)) {
event = *head;
goto drive_resp;
}
if (((*head)->state == MEM_DONE) && !allow_reorder(cmd->parms)) {
break;
}
head = &((*head)->_next);
}
// Randomly decide not to drive response yet
event = *head;
if ((event == NULL) || ((event->client_state == CLIENT_VALID)
&& !allow_resp(cmd->parms))) {
return;
}
// Test for client disconnect
if ((event == NULL) || ((client = _get_client(cmd, event)) == NULL))
return;
// Send response, remove command from list and free memory
if ((event->resp == PSL_RESPONSE_PAGED) ||
(event->resp == PSL_RESPONSE_AERROR) ||
(event->resp == PSL_RESPONSE_DERROR)) {
client->flushing = FLUSH_FLUSHING;
_update_pending_resps(cmd, PSL_RESPONSE_FLUSHED);
}
drive_resp:
// Check for pending buffer activity
if (event == cmd->buffer_read) {
fatal_msg("Driving response when buffer read still active");
_print_event(event);
assert(event != cmd->buffer_read);
}
rc = psl_response(cmd->afu_event, event->tag, event->resp, 1, 0, 0);
if (rc == PSL_SUCCESS) {
debug_msg("%s:RESPONSE tag=0x%02x code=0x%x", cmd->afu_name,
event->tag, event->resp);
debug_cmd_response(cmd->dbg_fp, cmd->dbg_id, event->tag);
if ((client != NULL) && (event->command == PSL_COMMAND_RESTART))
client->flushing = FLUSH_NONE;
*head = event->_next;
free(event->data);
free(event->parity);
free(event);
cmd->credits++;
}
}