libmachdev: Add common machdev

* libmachdev: New directory.

1 files changed, 326 insertions, 0 deletions

diff --git a/libmachdev/ds_routines.c b/libmachdev/ds_routines.c
new file mode 100644
index 00000000..5a61805c
--- /dev/null
+++ b/libmachdev/ds_routines.c
@@ -0,0 +1,326 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1993,1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date: 	3/89
+ */
+
+/*
+ * Mach device server routines (i386at version).
+ *
+ * Copyright (c) 1996 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Shantanu Goel, University of Utah CSL
+ */
+
+/*
+ * This is is providing the same multiplexing layer as in the GNU Mach kernel,
+ * which also handles the MIG details.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <error.h>
+#include <assert.h>
+
+#include <hurd.h>
+#include <mach.h>
+
+#include "device_S.h"
+#include "notify_S.h"
+#include "machdev-dev_hdr.h"
+#include "machdev.h"
+
+struct port_bucket *machdev_device_bucket;
+struct port_class *machdev_device_class;
+
+#define MAX_NUM_EMULATION 32
+
+/* List of emulations.  */
+static struct machdev_device_emulation_ops *emulation_list[MAX_NUM_EMULATION];
+static int num_emul = 0;
+
+boolean_t machdev_is_master_device (mach_port_t port);
+
+/*
+ * What follows is the interface for the native Mach devices.
+ */
+
+/* Implementation of device interface */
+io_return_t
+ds_device_open (mach_port_t open_port, mach_port_t reply_port,
+                mach_msg_type_name_t reply_port_type, dev_mode_t mode,
+                char *name, device_t *devp, mach_msg_type_name_t *devicePoly)
+{
+  int i;
+  io_return_t err;
+
+  /* Open must be called on the master device port.  */
+  if (!machdev_is_master_device (open_port))
+    return D_INVALID_OPERATION;
+
+  /* There must be a reply port.  */
+  if (! MACH_PORT_VALID (reply_port))
+    return MIG_NO_REPLY;
+
+  /* Call each emulation's open routine to find the device.  */
+  for (i = 0; i < num_emul; i++)
+    {
+      err = (*emulation_list[i]->open) (reply_port, reply_port_type,
+					mode, name, devp, devicePoly);
+      if (err != D_NO_SUCH_DEVICE)
+	break;
+    }
+
+  return err;
+}
+
+io_return_t
+ds_device_close (struct mach_device *device)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  return (device->dev.emul_ops->close
+	  ? (*device->dev.emul_ops->close) (device->dev.emul_data)
+	  : D_SUCCESS);
+}
+
+io_return_t
+ds_device_write (struct mach_device *device, mach_port_t reply_port,
+		 mach_msg_type_name_t reply_port_type, dev_mode_t mode,
+		 recnum_t recnum, io_buf_ptr_t data, unsigned int count,
+		 int *bytes_written)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (data == 0)
+    return D_INVALID_SIZE;
+
+  if (! device->dev.emul_ops->write)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->write) (device->dev.emul_data, reply_port,
+					 reply_port_type, mode, recnum,
+					 data, count, bytes_written);
+}
+
+io_return_t
+ds_device_write_inband (struct mach_device *device, mach_port_t reply_port,
+			mach_msg_type_name_t reply_port_type,
+			dev_mode_t mode, recnum_t recnum,
+			io_buf_ptr_inband_t data, unsigned count,
+			int *bytes_written)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (data == 0)
+    return D_INVALID_SIZE;
+
+  if (! device->dev.emul_ops->write_inband)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->write_inband) (device->dev.emul_data,
+					        reply_port, reply_port_type,
+					        mode, recnum,
+					        data, count, bytes_written);
+}
+
+io_return_t
+ds_device_read (struct mach_device *device, mach_port_t reply_port,
+		mach_msg_type_name_t reply_port_type, dev_mode_t mode,
+		recnum_t recnum, int count, io_buf_ptr_t *data,
+		unsigned *bytes_read)
+{
+  /* Refuse if device is dead or not completely open.  */
+
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->read)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->read) (device->dev.emul_data, reply_port,
+				        reply_port_type, mode, recnum,
+				        count, data, bytes_read);
+}
+
+io_return_t
+ds_device_read_inband (struct mach_device *device, mach_port_t reply_port,
+		       mach_msg_type_name_t reply_port_type, dev_mode_t mode,
+		       recnum_t recnum, int count, char *data,
+		       unsigned *bytes_read)
+{
+  /* Refuse if device is dead or not completely open.  */
+
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->read_inband)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->read_inband) (device->dev.emul_data,
+					       reply_port,
+					       reply_port_type, mode, recnum,
+					       count, data, bytes_read);
+}
+
+io_return_t
+ds_device_set_status (struct mach_device *device, dev_flavor_t flavor,
+		      dev_status_t status, mach_msg_type_number_t status_count)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->set_status)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->set_status) (device->dev.emul_data, flavor,
+					      status, status_count);
+}
+
+io_return_t
+ds_device_get_status (struct mach_device *device, dev_flavor_t flavor,
+                      dev_status_t status,
+		      mach_msg_type_number_t *status_count)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->get_status)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->get_status) (device->dev.emul_data, flavor,
+					      status, status_count);
+}
+
+io_return_t
+ds_device_set_filter (struct mach_device *device, mach_port_t receive_port,
+                      int priority, filter_t *filter, unsigned filter_count)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->set_filter)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->set_filter) (device->dev.emul_data,
+					      receive_port,
+					      priority, filter, filter_count);
+}
+
+io_return_t
+ds_device_map (struct mach_device *device, vm_prot_t prot, vm_offset_t offset,
+	       vm_size_t size, mach_port_t *pager, boolean_t unmap)
+{
+  /* Refuse if device is dead or not completely open.  */
+  if (device == MACH_DEVICE_NULL)
+    return D_NO_SUCH_DEVICE;
+
+  if (! device->dev.emul_ops->map)
+    return D_INVALID_OPERATION;
+
+  return (*device->dev.emul_ops->map) (device->dev.emul_data, prot,
+				       offset, size, pager, unmap);
+
+}
+
+error_t
+machdev_create_device_port (size_t size, void *result)
+{
+  return ports_create_port (machdev_device_class, machdev_device_bucket,
+			    size, result);
+}
+
+void machdev_device_init()
+{
+  int i;
+
+  machdev_device_bucket = ports_create_bucket ();
+  machdev_device_class = ports_create_class (0, 0);
+
+  for (i = 0; i < num_emul; i++)
+    {
+      if (emulation_list[i]->init)
+	emulation_list[i]->init();
+    }
+}
+
+static int
+demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
+{
+  mig_routine_t routine;
+  if ((routine = device_server_routine (inp)) ||
+      (routine = notify_server_routine (inp)))
+    {
+      (*routine) (inp, outp);
+      return TRUE;
+    }
+  else
+    return FALSE;
+}
+
+void machdev_register (struct machdev_device_emulation_ops *ops)
+{
+  assert(num_emul < MAX_NUM_EMULATION-1);
+  emulation_list[num_emul++] = ops;
+}
+
+void * machdev_server(void *arg)
+{
+  /* Launch.  */
+  do
+    {
+      ports_manage_port_operations_one_thread (machdev_device_bucket, demuxer, 0);
+    } while (1);
+
+  return NULL;
+}