hw/usb/hcd-xhci: Remove XHCI_FLAG_SS_FIRST flag

XHCI_FLAG_SS_FIRST was only used by the pc-i440fx-2.0 machine,
which got removed. Remove it and simplify various functions in
hcd-xhci.c.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20240617071118.60464-5-philmd@linaro.org>

hw/usb/hcd-xhci-nec.c

@@ -41,8 +41,6 @@ struct XHCINecState {
 static Property nec_xhci_properties[] = {
     DEFINE_PROP_ON_OFF_AUTO("msi", XHCIPciState, msi, ON_OFF_AUTO_AUTO),
     DEFINE_PROP_ON_OFF_AUTO("msix", XHCIPciState, msix, ON_OFF_AUTO_AUTO),
-    DEFINE_PROP_BIT("superspeed-ports-first", XHCINecState, flags,
-                    XHCI_FLAG_SS_FIRST, true),
     DEFINE_PROP_UINT32("intrs", XHCINecState, intrs, XHCI_MAXINTRS),
     DEFINE_PROP_UINT32("slots", XHCINecState, slots, XHCI_MAXSLOTS),
     DEFINE_PROP_END_OF_LIST(),

hw/usb/hcd-xhci-pci.c

@@ -242,7 +242,6 @@ static void qemu_xhci_instance_init(Object *obj)
     s->msix     = ON_OFF_AUTO_AUTO;
     xhci->numintrs = XHCI_MAXINTRS;
     xhci->numslots = XHCI_MAXSLOTS;
-    xhci_set_flag(xhci, XHCI_FLAG_SS_FIRST);
 }
 
 static const TypeInfo qemu_xhci_info = {

hw/usb/hcd-xhci.c

@@ -541,18 +541,10 @@ static XHCIPort *xhci_lookup_port(XHCIState *xhci, struct USBPort *uport)
     case USB_SPEED_LOW:
     case USB_SPEED_FULL:
     case USB_SPEED_HIGH:
-        if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-            index = uport->index + xhci->numports_3;
-        } else {
-            index = uport->index;
-        }
+        index = uport->index + xhci->numports_3;
         break;
     case USB_SPEED_SUPER:
-        if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-            index = uport->index;
-        } else {
-            index = uport->index + xhci->numports_2;
-        }
+        index = uport->index;
         break;
     default:
         return NULL;
@@ -2779,11 +2771,7 @@ static uint64_t xhci_cap_read(void *ptr, hwaddr reg, unsigned size)
         ret = 0x20425355; /* "USB " */
         break;
     case 0x28: /* Supported Protocol:08 */
-        if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-            ret = (xhci->numports_2<<8) | (xhci->numports_3+1);
-        } else {
-            ret = (xhci->numports_2<<8) | 1;
-        }
+        ret = (xhci->numports_2 << 8) | (xhci->numports_3 + 1);
         break;
     case 0x2c: /* Supported Protocol:0c */
         ret = 0x00000000; /* reserved */
@@ -2795,11 +2783,7 @@ static uint64_t xhci_cap_read(void *ptr, hwaddr reg, unsigned size)
         ret = 0x20425355; /* "USB " */
         break;
     case 0x38: /* Supported Protocol:08 */
-        if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-            ret = (xhci->numports_3<<8) | 1;
-        } else {
-            ret = (xhci->numports_3<<8) | (xhci->numports_2+1);
-        }
+        ret = (xhci->numports_3 << 8) | 1;
         break;
     case 0x3c: /* Supported Protocol:0c */
         ret = 0x00000000; /* reserved */
@@ -3349,13 +3333,8 @@ static void usb_xhci_init(XHCIState *xhci)
     for (i = 0; i < usbports; i++) {
         speedmask = 0;
         if (i < xhci->numports_2) {
-            if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-                port = &xhci->ports[i + xhci->numports_3];
-                port->portnr = i + 1 + xhci->numports_3;
-            } else {
-                port = &xhci->ports[i];
-                port->portnr = i + 1;
-            }
+            port = &xhci->ports[i + xhci->numports_3];
+            port->portnr = i + 1 + xhci->numports_3;
             port->uport = &xhci->uports[i];
             port->speedmask =
                 USB_SPEED_MASK_LOW  |
@@ -3366,13 +3345,8 @@ static void usb_xhci_init(XHCIState *xhci)
             speedmask |= port->speedmask;
         }
         if (i < xhci->numports_3) {
-            if (xhci_get_flag(xhci, XHCI_FLAG_SS_FIRST)) {
-                port = &xhci->ports[i];
-                port->portnr = i + 1;
-            } else {
-                port = &xhci->ports[i + xhci->numports_2];
-                port->portnr = i + 1 + xhci->numports_2;
-            }
+            port = &xhci->ports[i];
+            port->portnr = i + 1;
             port->uport = &xhci->uports[i];
             port->speedmask = USB_SPEED_MASK_SUPER;
             assert(i < XHCI_MAXPORTS);

hw/usb/hcd-xhci.h

@@ -36,8 +36,7 @@ typedef struct XHCIStreamContext XHCIStreamContext;
 typedef struct XHCIEPContext XHCIEPContext;
 
 enum xhci_flags {
-    XHCI_FLAG_SS_FIRST = 1,
-    XHCI_FLAG_ENABLE_STREAMS,
+    XHCI_FLAG_ENABLE_STREAMS = 1,
 };
 
 typedef enum TRBType {