Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 186 insertions, 0 deletions

diff --git a/hw/usb/hcd-dwc2.h b/hw/usb/hcd-dwc2.h
new file mode 100644
index 000000000..6998b0470
--- /dev/null
+++ b/hw/usb/hcd-dwc2.h
@@ -0,0 +1,186 @@
+/*
+ * dwc-hsotg (dwc2) USB host controller state definitions
+ *
+ * Based on hw/usb/hcd-ehci.h
+ *
+ * Copyright (c) 2020 Paul Zimmerman <pauldzim@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef HW_USB_DWC2_H
+#define HW_USB_DWC2_H
+
+#include "qemu/timer.h"
+#include "hw/irq.h"
+#include "hw/sysbus.h"
+#include "hw/usb.h"
+#include "sysemu/dma.h"
+#include "qom/object.h"
+
+#define DWC2_MMIO_SIZE      0x11000
+
+#define DWC2_NB_CHAN        8       /* Number of host channels */
+#define DWC2_MAX_XFER_SIZE  65536   /* Max transfer size expected in HCTSIZ */
+
+typedef struct DWC2Packet DWC2Packet;
+typedef struct DWC2State DWC2State;
+typedef struct DWC2Class DWC2Class;
+
+enum async_state {
+    DWC2_ASYNC_NONE = 0,
+    DWC2_ASYNC_INITIALIZED,
+    DWC2_ASYNC_INFLIGHT,
+    DWC2_ASYNC_FINISHED,
+};
+
+struct DWC2Packet {
+    USBPacket packet;
+    uint32_t devadr;
+    uint32_t epnum;
+    uint32_t epdir;
+    uint32_t mps;
+    uint32_t pid;
+    uint32_t index;
+    uint32_t pcnt;
+    uint32_t len;
+    int32_t async;
+    bool small;
+    bool needs_service;
+};
+
+struct DWC2State {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    USBBus bus;
+    qemu_irq irq;
+    MemoryRegion *dma_mr;
+    AddressSpace dma_as;
+    MemoryRegion container;
+    MemoryRegion hsotg;
+    MemoryRegion fifos;
+
+    union {
+#define DWC2_GLBREG_SIZE    0x70
+        uint32_t glbreg[DWC2_GLBREG_SIZE / sizeof(uint32_t)];
+        struct {
+            uint32_t gotgctl;       /* 00 */
+            uint32_t gotgint;       /* 04 */
+            uint32_t gahbcfg;       /* 08 */
+            uint32_t gusbcfg;       /* 0c */
+            uint32_t grstctl;       /* 10 */
+            uint32_t gintsts;       /* 14 */
+            uint32_t gintmsk;       /* 18 */
+            uint32_t grxstsr;       /* 1c */
+            uint32_t grxstsp;       /* 20 */
+            uint32_t grxfsiz;       /* 24 */
+            uint32_t gnptxfsiz;     /* 28 */
+            uint32_t gnptxsts;      /* 2c */
+            uint32_t gi2cctl;       /* 30 */
+            uint32_t gpvndctl;      /* 34 */
+            uint32_t ggpio;         /* 38 */
+            uint32_t guid;          /* 3c */
+            uint32_t gsnpsid;       /* 40 */
+            uint32_t ghwcfg1;       /* 44 */
+            uint32_t ghwcfg2;       /* 48 */
+            uint32_t ghwcfg3;       /* 4c */
+            uint32_t ghwcfg4;       /* 50 */
+            uint32_t glpmcfg;       /* 54 */
+            uint32_t gpwrdn;        /* 58 */
+            uint32_t gdfifocfg;     /* 5c */
+            uint32_t gadpctl;       /* 60 */
+            uint32_t grefclk;       /* 64 */
+            uint32_t gintmsk2;      /* 68 */
+            uint32_t gintsts2;      /* 6c */
+        };
+    };
+
+    union {
+#define DWC2_FSZREG_SIZE    0x04
+        uint32_t fszreg[DWC2_FSZREG_SIZE / sizeof(uint32_t)];
+        struct {
+            uint32_t hptxfsiz;      /* 100 */
+        };
+    };
+
+    union {
+#define DWC2_HREG0_SIZE     0x44
+        uint32_t hreg0[DWC2_HREG0_SIZE / sizeof(uint32_t)];
+        struct {
+            uint32_t hcfg;          /* 400 */
+            uint32_t hfir;          /* 404 */
+            uint32_t hfnum;         /* 408 */
+            uint32_t rsvd0;         /* 40c */
+            uint32_t hptxsts;       /* 410 */
+            uint32_t haint;         /* 414 */
+            uint32_t haintmsk;      /* 418 */
+            uint32_t hflbaddr;      /* 41c */
+            uint32_t rsvd1[8];      /* 420-43c */
+            uint32_t hprt0;         /* 440 */
+        };
+    };
+
+#define DWC2_HREG1_SIZE     (0x20 * DWC2_NB_CHAN)
+    uint32_t hreg1[DWC2_HREG1_SIZE / sizeof(uint32_t)];
+
+#define hcchar(_ch)     hreg1[((_ch) << 3) + 0] /* 500, 520, ... */
+#define hcsplt(_ch)     hreg1[((_ch) << 3) + 1] /* 504, 524, ... */
+#define hcint(_ch)      hreg1[((_ch) << 3) + 2] /* 508, 528, ... */
+#define hcintmsk(_ch)   hreg1[((_ch) << 3) + 3] /* 50c, 52c, ... */
+#define hctsiz(_ch)     hreg1[((_ch) << 3) + 4] /* 510, 530, ... */
+#define hcdma(_ch)      hreg1[((_ch) << 3) + 5] /* 514, 534, ... */
+#define hcdmab(_ch)     hreg1[((_ch) << 3) + 7] /* 51c, 53c, ... */
+
+    union {
+#define DWC2_PCGREG_SIZE    0x08
+        uint32_t pcgreg[DWC2_PCGREG_SIZE / sizeof(uint32_t)];
+        struct {
+            uint32_t pcgctl;        /* e00 */
+            uint32_t pcgcctl1;      /* e04 */
+        };
+    };
+
+    /* TODO - implement FIFO registers for slave mode */
+#define DWC2_HFIFO_SIZE     (0x1000 * DWC2_NB_CHAN)
+
+    /*
+     *  Internal state
+     */
+    QEMUTimer *eof_timer;
+    QEMUTimer *frame_timer;
+    QEMUBH *async_bh;
+    int64_t sof_time;
+    int64_t usb_frame_time;
+    int64_t usb_bit_time;
+    uint32_t usb_version;
+    uint16_t frame_number;
+    uint16_t fi;
+    uint16_t next_chan;
+    bool working;
+    USBPort uport;
+    DWC2Packet packet[DWC2_NB_CHAN];                   /* one packet per chan */
+    uint8_t usb_buf[DWC2_NB_CHAN][DWC2_MAX_XFER_SIZE]; /* one buffer per chan */
+};
+
+struct DWC2Class {
+    /*< private >*/
+    SysBusDeviceClass parent_class;
+    ResettablePhases parent_phases;
+
+    /*< public >*/
+};
+
+#define TYPE_DWC2_USB   "dwc2-usb"
+OBJECT_DECLARE_TYPE(DWC2State, DWC2Class, DWC2_USB)
+
+#endif