[Qemu-devel] [PATCH 14/36] usb: Add an int_req flag to USBPacket

[Gerd Hoffmann <kraxel@redhat.com>]

From: Hans de Goede <hdegoede@redhat.com>

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb.h          |    3 ++-
 hw/usb/core.c     |    3 ++-
 hw/usb/hcd-ehci.c |    6 ++++--
 hw/usb/hcd-musb.c |    2 +-
 hw/usb/hcd-ohci.c |    7 +++++--
 hw/usb/hcd-uhci.c |    3 ++-
 hw/usb/hcd-xhci.c |   16 +++++++++++-----
 7 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/hw/usb.h b/hw/usb.h
index 1fcf79c..3a6cc84 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -352,6 +352,7 @@ struct USBPacket {
     QEMUIOVector iov;
     uint64_t parameter; /* control transfers */
     bool short_not_ok;
+    bool int_req;
     int result; /* transfer length or USB_RET_* status code */
     /* Internal use by the USB layer.  */
     USBPacketState state;
@@ -362,7 +363,7 @@ void usb_packet_init(USBPacket *p);
 void usb_packet_set_state(USBPacket *p, USBPacketState state);
 void usb_packet_check_state(USBPacket *p, USBPacketState expected);
 void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep, uint64_t id,
-                      bool short_not_ok);
+                      bool short_not_ok, bool int_req);
 void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len);
 int usb_packet_map(USBPacket *p, QEMUSGList *sgl);
 void usb_packet_unmap(USBPacket *p, QEMUSGList *sgl);
diff --git a/hw/usb/core.c b/hw/usb/core.c
index f4a5ad2..87a513f 100644
--- a/hw/usb/core.c
+++ b/hw/usb/core.c
@@ -533,7 +533,7 @@ void usb_packet_set_state(USBPacket *p, USBPacketState state)
 }
 
 void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep, uint64_t id,
-                      bool short_not_ok)
+                      bool short_not_ok, bool int_req)
 {
     assert(!usb_packet_is_inflight(p));
     assert(p->iov.iov != NULL);
@@ -543,6 +543,7 @@ void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep, uint64_t id,
     p->result = 0;
     p->parameter = 0;
     p->short_not_ok = short_not_ok;
+    p->int_req = int_req;
     qemu_iovec_reset(&p->iov);
     usb_packet_set_state(p, USB_PACKET_SETUP);
 }
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 8e8ec6b..8ac78ad 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -1592,7 +1592,8 @@ static int ehci_execute(EHCIPacket *p, const char *action)
         }
 
         spd = (p->pid == USB_TOKEN_IN && NLPTR_TBIT(p->qtd.altnext) == 0);
-        usb_packet_setup(&p->packet, p->pid, ep, p->qtdaddr, spd);
+        usb_packet_setup(&p->packet, p->pid, ep, p->qtdaddr, spd,
+                         (p->qtd.token & QTD_TOKEN_IOC) != 0);
         usb_packet_map(&p->packet, &p->sgl);
         p->async = EHCI_ASYNC_INITIALIZED;
     }
@@ -1662,7 +1663,8 @@ static int ehci_process_itd(EHCIState *ehci,
             dev = ehci_find_device(ehci, devaddr);
             ep = usb_ep_get(dev, pid, endp);
             if (ep && ep->type == USB_ENDPOINT_XFER_ISOC) {
-                usb_packet_setup(&ehci->ipacket, pid, ep, addr, false);
+                usb_packet_setup(&ehci->ipacket, pid, ep, addr, false,
+                                 (itd->transact[i] & ITD_XACT_IOC) != 0);
                 usb_packet_map(&ehci->ipacket, &ehci->isgl);
                 ret = usb_handle_packet(dev, &ehci->ipacket);
                 assert(ret != USB_RET_ASYNC);
diff --git a/hw/usb/hcd-musb.c b/hw/usb/hcd-musb.c
index c4309a4..4f55390 100644
--- a/hw/usb/hcd-musb.c
+++ b/hw/usb/hcd-musb.c
@@ -627,7 +627,7 @@ static void musb_packet(MUSBState *s, MUSBEndPoint *ep,
     dev = usb_find_device(&s->port, ep->faddr[idx]);
     uep = usb_ep_get(dev, pid, ep->type[idx] & 0xf);
     usb_packet_setup(&ep->packey[dir].p, pid, uep,
-                     (dev->addr << 16) | (uep->nr << 8) | pid, false);
+                     (dev->addr << 16) | (uep->nr << 8) | pid, false, true);
     usb_packet_addbuf(&ep->packey[dir].p, ep->buf[idx], len);
     ep->packey[dir].ep = ep;
     ep->packey[dir].dir = dir;
diff --git a/hw/usb/hcd-ohci.c b/hw/usb/hcd-ohci.c
index 00e2e1a..7571e9e 100644
--- a/hw/usb/hcd-ohci.c
+++ b/hw/usb/hcd-ohci.c
@@ -810,9 +810,11 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed,
     if (completion) {
         ret = ohci->usb_packet.result;
     } else {
+        bool int_req = relative_frame_number == frame_count &&
+                       OHCI_BM(iso_td.flags, TD_DI) == 0;
         dev = ohci_find_device(ohci, OHCI_BM(ed->flags, ED_FA));
         ep = usb_ep_get(dev, pid, OHCI_BM(ed->flags, ED_EN));
-        usb_packet_setup(&ohci->usb_packet, pid, ep, addr, false);
+        usb_packet_setup(&ohci->usb_packet, pid, ep, addr, false, int_req);
         usb_packet_addbuf(&ohci->usb_packet, ohci->usb_buf, len);
         ret = usb_handle_packet(dev, &ohci->usb_packet);
         if (ret == USB_RET_ASYNC) {
@@ -1012,7 +1014,8 @@ static int ohci_service_td(OHCIState *ohci, struct ohci_ed *ed)
         }
         dev = ohci_find_device(ohci, OHCI_BM(ed->flags, ED_FA));
         ep = usb_ep_get(dev, pid, OHCI_BM(ed->flags, ED_EN));
-        usb_packet_setup(&ohci->usb_packet, pid, ep, addr, !flag_r);
+        usb_packet_setup(&ohci->usb_packet, pid, ep, addr, !flag_r,
+                         OHCI_BM(td.flags, TD_DI) == 0);
         usb_packet_addbuf(&ohci->usb_packet, ohci->usb_buf, pktlen);
         ret = usb_handle_packet(dev, &ohci->usb_packet);
 #ifdef DEBUG_PACKET
diff --git a/hw/usb/hcd-uhci.c b/hw/usb/hcd-uhci.c
index 953897b..4a1ea6b 100644
--- a/hw/usb/hcd-uhci.c
+++ b/hw/usb/hcd-uhci.c
@@ -860,7 +860,8 @@ static int uhci_handle_td(UHCIState *s, uint32_t addr, UHCI_TD *td,
     if (ep_ret) {
         *ep_ret = ep;
     }
-    usb_packet_setup(&async->packet, pid, ep, addr, spd);
+    usb_packet_setup(&async->packet, pid, ep, addr, spd,
+                     (td->ctrl & TD_CTRL_IOC) != 0);
     qemu_sglist_add(&async->sgl, td->buffer, max_len);
     usb_packet_map(&async->packet, &async->sgl);
 
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index ebfc5b8..caa5f3e 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -322,6 +322,7 @@ typedef struct XHCITransfer {
     bool running_retry;
     bool cancelled;
     bool complete;
+    bool int_req;
     unsigned int iso_pkts;
     unsigned int slotid;
     unsigned int epid;
@@ -1292,18 +1293,22 @@ static TRBCCode xhci_set_ep_dequeue(XHCIState *xhci, unsigned int slotid,
     return CC_SUCCESS;
 }
 
-static int xhci_xfer_map(XHCITransfer *xfer)
+static int xhci_xfer_create_sgl(XHCITransfer *xfer, int in_xfer)
 {
-    int in_xfer = (xfer->packet.pid == USB_TOKEN_IN);
     XHCIState *xhci = xfer->xhci;
     int i;
 
+    xfer->int_req = false;
     pci_dma_sglist_init(&xfer->sgl, &xhci->pci_dev, xfer->trb_count);
     for (i = 0; i < xfer->trb_count; i++) {
         XHCITRB *trb = &xfer->trbs[i];
         dma_addr_t addr;
         unsigned int chunk = 0;
 
+        if (trb->control & TRB_TR_IOC) {
+            xfer->int_req = true;
+        }
+
         switch (TRB_TYPE(*trb)) {
         case TR_DATA:
             if ((!(trb->control & TRB_TR_DIR)) != (!in_xfer)) {
@@ -1328,7 +1333,6 @@ static int xhci_xfer_map(XHCITransfer *xfer)
         }
     }
 
-    usb_packet_map(&xfer->packet, &xfer->sgl);
     return 0;
 
 err:
@@ -1446,8 +1450,10 @@ static int xhci_setup_packet(XHCITransfer *xfer)
         ep = usb_ep_get(dev, dir, xfer->epid >> 1);
     }
 
-    usb_packet_setup(&xfer->packet, dir, ep, xfer->trbs[0].addr, false);
-    xhci_xfer_map(xfer);
+    xhci_xfer_create_sgl(xfer, dir == USB_TOKEN_IN); /* Also sets int_req */
+    usb_packet_setup(&xfer->packet, dir, ep, xfer->trbs[0].addr, false,
+                     xfer->int_req);
+    usb_packet_map(&xfer->packet, &xfer->sgl);
     DPRINTF("xhci: setup packet pid 0x%x addr %d ep %d\n",
             xfer->packet.pid, dev->addr, ep->nr);
     return 0;
-- 
1.7.1