tools/firewire: nosy-dump: break up a deeply nested function
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter
parent
468066f771
commit
269fe10231
1 changed files with 139 additions and 120 deletions
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@ -486,6 +486,143 @@ static const struct packet_info packet_info[] = {
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},
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};
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static int
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handle_request_packet(uint32_t *data, size_t length)
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{
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struct link_packet *p = (struct link_packet *) data;
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struct subaction *sa, *prev;
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struct link_transaction *t;
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t = link_transaction_lookup(p->common.source, p->common.destination,
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p->common.tlabel);
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sa = subaction_create(data, length);
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t->request = sa;
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if (!list_empty(&t->request_list)) {
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prev = list_tail(&t->request_list,
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struct subaction, link);
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if (!ACK_BUSY(prev->ack)) {
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/*
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* error, we should only see ack_busy_* before the
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* ack_pending/ack_complete -- this is an ack_pending
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* instead (ack_complete would have finished the
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* transaction).
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*/
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}
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if (prev->packet.common.tcode != sa->packet.common.tcode ||
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prev->packet.common.tlabel != sa->packet.common.tlabel) {
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/* memcmp() ? */
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/* error, these should match for retries. */
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}
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}
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list_append(&t->request_list, &sa->link);
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switch (sa->ack) {
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case ACK_COMPLETE:
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if (p->common.tcode != TCODE_WRITE_QUADLET &&
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p->common.tcode != TCODE_WRITE_BLOCK)
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/* error, unified transactions only allowed for write */;
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list_remove(&t->link);
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handle_transaction(t);
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break;
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case ACK_NO_ACK:
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case ACK_DATA_ERROR:
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case ACK_TYPE_ERROR:
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list_remove(&t->link);
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handle_transaction(t);
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break;
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case ACK_PENDING:
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/* request subaction phase over, wait for response. */
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break;
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case ACK_BUSY_X:
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case ACK_BUSY_A:
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case ACK_BUSY_B:
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/* ok, wait for retry. */
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/* check that retry protocol is respected. */
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break;
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}
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return 1;
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}
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static int
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handle_response_packet(uint32_t *data, size_t length)
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{
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struct link_packet *p = (struct link_packet *) data;
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struct subaction *sa, *prev;
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struct link_transaction *t;
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t = link_transaction_lookup(p->common.destination, p->common.source,
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p->common.tlabel);
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if (list_empty(&t->request_list)) {
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/* unsolicited response */
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}
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sa = subaction_create(data, length);
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t->response = sa;
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if (!list_empty(&t->response_list)) {
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prev = list_tail(&t->response_list, struct subaction, link);
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if (!ACK_BUSY(prev->ack)) {
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/*
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* error, we should only see ack_busy_* before the
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* ack_pending/ack_complete
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*/
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}
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if (prev->packet.common.tcode != sa->packet.common.tcode ||
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prev->packet.common.tlabel != sa->packet.common.tlabel) {
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/* use memcmp() instead? */
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/* error, these should match for retries. */
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}
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} else {
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prev = list_tail(&t->request_list, struct subaction, link);
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if (prev->ack != ACK_PENDING) {
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/*
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* error, should not get response unless last request got
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* ack_pending.
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*/
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}
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if (packet_info[prev->packet.common.tcode].response_tcode !=
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sa->packet.common.tcode) {
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/* error, tcode mismatch */
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}
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}
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list_append(&t->response_list, &sa->link);
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switch (sa->ack) {
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case ACK_COMPLETE:
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case ACK_NO_ACK:
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case ACK_DATA_ERROR:
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case ACK_TYPE_ERROR:
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list_remove(&t->link);
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handle_transaction(t);
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/* transaction complete, remove t from pending list. */
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break;
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case ACK_PENDING:
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/* error for responses. */
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break;
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case ACK_BUSY_X:
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case ACK_BUSY_A:
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case ACK_BUSY_B:
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/* no problem, wait for next retry */
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break;
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}
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return 1;
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}
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static int
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handle_packet(uint32_t *data, size_t length)
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{
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@ -494,131 +631,13 @@ handle_packet(uint32_t *data, size_t length)
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clear_pending_transaction_list();
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} else if (length > sizeof(struct phy_packet)) {
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struct link_packet *p = (struct link_packet *) data;
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struct subaction *sa, *prev;
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struct link_transaction *t;
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switch (packet_info[p->common.tcode].type) {
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case PACKET_REQUEST:
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t = link_transaction_lookup(p->common.source, p->common.destination,
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p->common.tlabel);
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sa = subaction_create(data, length);
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t->request = sa;
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if (!list_empty(&t->request_list)) {
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prev = list_tail(&t->request_list,
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struct subaction, link);
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if (!ACK_BUSY(prev->ack)) {
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/*
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* error, we should only see ack_busy_* before the
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* ack_pending/ack_complete -- this is an ack_pending
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* instead (ack_complete would have finished the
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* transaction).
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*/
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}
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if (prev->packet.common.tcode != sa->packet.common.tcode ||
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prev->packet.common.tlabel != sa->packet.common.tlabel) {
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/* memcmp() ? */
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/* error, these should match for retries. */
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}
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}
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list_append(&t->request_list, &sa->link);
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switch (sa->ack) {
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case ACK_COMPLETE:
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if (p->common.tcode != TCODE_WRITE_QUADLET &&
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p->common.tcode != TCODE_WRITE_BLOCK)
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/* error, unified transactions only allowed for write */;
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list_remove(&t->link);
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handle_transaction(t);
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break;
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case ACK_NO_ACK:
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case ACK_DATA_ERROR:
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case ACK_TYPE_ERROR:
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list_remove(&t->link);
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handle_transaction(t);
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break;
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case ACK_PENDING:
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/* request subaction phase over, wait for response. */
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break;
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case ACK_BUSY_X:
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case ACK_BUSY_A:
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case ACK_BUSY_B:
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/* ok, wait for retry. */
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/* check that retry protocol is respected. */
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break;
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}
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break;
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return handle_request_packet(data, length);
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case PACKET_RESPONSE:
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t = link_transaction_lookup(p->common.destination, p->common.source,
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p->common.tlabel);
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if (list_empty(&t->request_list)) {
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/* unsolicited response */
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}
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sa = subaction_create(data, length);
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t->response = sa;
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if (!list_empty(&t->response_list)) {
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prev = list_tail(&t->response_list, struct subaction, link);
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if (!ACK_BUSY(prev->ack)) {
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/*
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* error, we should only see ack_busy_* before the
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* ack_pending/ack_complete
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*/
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}
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if (prev->packet.common.tcode != sa->packet.common.tcode ||
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prev->packet.common.tlabel != sa->packet.common.tlabel) {
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/* use memcmp() instead? */
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/* error, these should match for retries. */
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}
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} else {
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prev = list_tail(&t->request_list, struct subaction, link);
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if (prev->ack != ACK_PENDING) {
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/*
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* error, should not get response unless last request got
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* ack_pending.
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*/
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}
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if (packet_info[prev->packet.common.tcode].response_tcode !=
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sa->packet.common.tcode) {
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/* error, tcode mismatch */
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}
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}
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list_append(&t->response_list, &sa->link);
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switch (sa->ack) {
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case ACK_COMPLETE:
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case ACK_NO_ACK:
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case ACK_DATA_ERROR:
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case ACK_TYPE_ERROR:
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list_remove(&t->link);
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handle_transaction(t);
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/* transaction complete, remove t from pending list. */
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break;
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case ACK_PENDING:
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/* error for responses. */
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break;
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case ACK_BUSY_X:
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case ACK_BUSY_A:
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case ACK_BUSY_B:
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/* no problem, wait for next retry */
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break;
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}
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break;
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return handle_response_packet(data, length);
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case PACKET_OTHER:
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case PACKET_RESERVED:
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