ehci: Get rid of the magical PROC_ERR status
Instead make ehci_execute and ehci_fill_queue return the again value. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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e94ca437ba
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01e26b0ea3
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@ -29,9 +29,6 @@
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#include "hw/usb/hcd-ehci.h"
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/* internal processing - reset HC to try and recover */
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#define USB_RET_PROCERR (-99)
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/* Capability Registers Base Address - section 2.2 */
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#define CAPLENGTH 0x0000 /* 1-byte, 0x0001 reserved */
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#define HCIVERSION 0x0002 /* 2-bytes, i/f version # */
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@ -1111,7 +1108,7 @@ static int ehci_init_transfer(EHCIPacket *p)
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while (bytes > 0) {
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if (cpage > 4) {
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fprintf(stderr, "cpage out of range (%d)\n", cpage);
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return USB_RET_PROCERR;
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return -1;
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}
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page = p->qtd.bufptr[cpage] & QTD_BUFPTR_MASK;
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@ -1248,8 +1245,7 @@ static void ehci_execute_complete(EHCIQueue *q)
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}
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}
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// 4.10.3
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/* 4.10.3 returns "again" */
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static int ehci_execute(EHCIPacket *p, const char *action)
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{
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USBEndpoint *ep;
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@ -1261,13 +1257,13 @@ static int ehci_execute(EHCIPacket *p, const char *action)
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if (!(p->qtd.token & QTD_TOKEN_ACTIVE)) {
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fprintf(stderr, "Attempting to execute inactive qtd\n");
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return USB_RET_PROCERR;
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return -1;
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}
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if (get_field(p->qtd.token, QTD_TOKEN_TBYTES) > BUFF_SIZE) {
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ehci_trace_guest_bug(p->queue->ehci,
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"guest requested more bytes than allowed");
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return USB_RET_PROCERR;
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return -1;
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}
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p->pid = (p->qtd.token & QTD_TOKEN_PID_MASK) >> QTD_TOKEN_PID_SH;
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@ -1291,7 +1287,7 @@ static int ehci_execute(EHCIPacket *p, const char *action)
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if (p->async == EHCI_ASYNC_NONE) {
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if (ehci_init_transfer(p) != 0) {
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return USB_RET_PROCERR;
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return -1;
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}
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spd = (p->pid == USB_TOKEN_IN && NLPTR_TBIT(p->qtd.altnext) == 0);
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@ -1310,14 +1306,10 @@ static int ehci_execute(EHCIPacket *p, const char *action)
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if (p->packet.actual_length > BUFF_SIZE) {
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fprintf(stderr, "ret from usb_handle_packet > BUFF_SIZE\n");
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return USB_RET_PROCERR;
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return -1;
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}
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if (p->packet.status == USB_RET_SUCCESS) {
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return p->packet.actual_length;
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} else {
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return p->packet.status;
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}
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return 1;
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}
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/* 4.7.2
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@ -1352,7 +1344,7 @@ static int ehci_process_itd(EHCIState *ehci,
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}
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if (len > BUFF_SIZE) {
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return USB_RET_PROCERR;
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return -1;
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}
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qemu_sglist_init(&ehci->isgl, 2, ehci->dma);
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@ -1752,8 +1744,7 @@ static int ehci_state_fetchqtd(EHCIQueue *q)
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break;
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case EHCI_ASYNC_INFLIGHT:
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/* Check if the guest has added new tds to the queue */
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again = (ehci_fill_queue(QTAILQ_LAST(&q->packets, pkts_head)) ==
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USB_RET_PROCERR) ? -1 : 1;
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again = ehci_fill_queue(QTAILQ_LAST(&q->packets, pkts_head));
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/* Unfinished async handled packet, go horizontal */
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ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
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break;
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@ -1790,6 +1781,7 @@ static int ehci_state_horizqh(EHCIQueue *q)
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return again;
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}
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/* Returns "again" */
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static int ehci_fill_queue(EHCIPacket *p)
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{
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USBEndpoint *ep = p->packet.ep;
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@ -1818,17 +1810,14 @@ static int ehci_fill_queue(EHCIPacket *p)
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p = ehci_alloc_packet(q);
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p->qtdaddr = qtdaddr;
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p->qtd = qtd;
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p->usb_status = ehci_execute(p, "queue");
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if (p->usb_status == USB_RET_PROCERR) {
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break;
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if (ehci_execute(p, "queue") == -1) {
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return -1;
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}
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assert(p->usb_status == USB_RET_ASYNC);
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assert(p->packet.status == USB_RET_ASYNC);
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p->async = EHCI_ASYNC_INFLIGHT;
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}
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if (p->usb_status != USB_RET_PROCERR) {
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usb_device_flush_ep_queue(ep->dev, ep);
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}
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return p->usb_status;
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usb_device_flush_ep_queue(ep->dev, ep);
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return 1;
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}
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static int ehci_state_execute(EHCIQueue *q)
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@ -1857,23 +1846,27 @@ static int ehci_state_execute(EHCIQueue *q)
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ehci_set_usbsts(q->ehci, USBSTS_REC);
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}
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p->usb_status = ehci_execute(p, "process");
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if (p->usb_status == USB_RET_PROCERR) {
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again = -1;
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again = ehci_execute(p, "process");
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if (again == -1) {
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goto out;
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}
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if (p->usb_status == USB_RET_ASYNC) {
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if (p->packet.status == USB_RET_ASYNC) {
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ehci_flush_qh(q);
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trace_usb_ehci_packet_action(p->queue, p, "async");
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p->async = EHCI_ASYNC_INFLIGHT;
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ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
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if (q->async) {
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again = (ehci_fill_queue(p) == USB_RET_PROCERR) ? -1 : 1;
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again = ehci_fill_queue(p);
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} else {
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again = 1;
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}
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goto out;
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}
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if (p->packet.status == USB_RET_SUCCESS) {
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p->usb_status = p->packet.actual_length;
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} else {
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p->usb_status = p->packet.status;
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}
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ehci_set_state(q->ehci, q->async, EST_EXECUTING);
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again = 1;
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