[RFC][PATCH 1/4] PVUSB: add io interface for PVUSB

[RFC][PATCH 1/4] PVUSB: add io interface for PVUSB

[Noboru Iwamatsu]

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This patch adds the io interface header file for the PVUSB.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>

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diff -r 51decc39e5e7 -r 9ef2e8c6cf3d include/xen/interface/io/usbif.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/xen/interface/io/usbif.h	Mon Mar 16 18:41:12 2009 +0900
@@ -0,0 +1,121 @@
+/*
+ * usbif.h
+ *
+ * USB I/O interface for Xen guest OSes.
+ *
+ * Copyright (C) 2009, FUJITSU LABORATORIES LTD.
+ * Author: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __XEN_PUBLIC_IO_USBIF_H__
+#define __XEN_PUBLIC_IO_USBIF_H__
+
+#include "ring.h"
+#include "../grant_table.h"
+
+/*
+ *  USB pipe in usbif_request
+ *
+ *  bits 0-5 are specific bits for virtual USB driver.
+ *  bits 7-31 are standard urb pipe.
+ *
+ *  - port number(NEW):	bits 0-4
+ *  				(USB_MAXCHILDREN is 31)
+ *
+ *  - operation flag(NEW):	bit 5
+ *  				(0 = submit urb,
+ *  				 1 = unlink urb)
+ *
+ *  - direction:		bit 7
+ *  				(0 = Host-to-Device [Out]
+ *                           1 = Device-to-Host [In])
+ *
+ *  - device address:	bits 8-14
+ *
+ *  - endpoint:		bits 15-18
+ *
+ *  - pipe type:		bits 30-31
+ *  				(00 = isochronous, 01 = interrupt,
+ *                           10 = control, 11 = bulk)
+ */
+#define usbif_pipeportnum(pipe) ((pipe) & 0x1f)
+#define usbif_setportnum_pipe(pipe,portnum) \
+	((pipe)|(portnum))
+#define usbif_pipeunlink(pipe) ((pipe) & 0x20)
+#define usbif_setunlink_pipe(pipe) ((pipe)|(0x20))
+
+#define USBIF_BACK_MAX_PENDING_REQS (128)
+#define USBIF_MAX_SEGMENTS_PER_REQUEST (10)
+
+struct usbif_request_segment {
+	grant_ref_t gref;
+	uint16_t offset;
+	uint16_t length;
+};
+
+struct usbif_request {
+	uint16_t id; /* request id */
+	uint16_t nr_buffer_segs; /* number of urb->transfer_buffer segments */
+
+	/* basic urb parameter */
+	uint32_t pipe;
+	uint16_t transfer_flags;
+	uint16_t buffer_length;
+	union {
+		uint8_t ctrl[8]; /* setup_packet (Ctrl) */
+
+		struct {
+			uint16_t interval; /* maximum (1024*8) in usb core */
+			uint16_t start_frame; /* start frame */
+			uint16_t number_of_packets; /* number of ISO packet */
+			uint16_t nr_frame_desc_segs; /* number of iso_frame_desc segments */
+		} isoc;
+
+		struct {
+			uint16_t interval; /* maximum (1024*8) in usb core */
+			uint16_t pad[3];
+		} intr;
+
+		struct {
+			uint16_t unlink_id; /* unlink request id */
+			uint16_t pad[3];
+		} unlink;
+
+	} u;
+
+	/* urb data segments */
+	struct usbif_request_segment seg[USBIF_MAX_SEGMENTS_PER_REQUEST];
+};
+typedef struct usbif_request usbif_request_t;
+
+struct usbif_response {
+	uint16_t id; /* request id */
+	uint16_t start_frame;  /* start frame (ISO) */
+	int32_t status; /* status (non-ISO) */
+	int32_t actual_length; /* actual transfer length */
+	int32_t error_count; /* number of ISO errors */
+};
+typedef struct usbif_response usbif_response_t;
+
+DEFINE_RING_TYPES(usbif, struct usbif_request, struct usbif_response);
+#define USB_RING_SIZE __RING_SIZE((struct usbif_sring *)0, PAGE_SIZE)
+
+#endif /* __XEN_PUBLIC_IO_USBIF_H__ */

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