/* * 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 */ #include #include #include #include #include #include #include "vm_param.h" #include "device_S.h" #include "notify_S.h" #include "io_req.h" #include "dev_hdr.h" #include "util.h" #include "queue.h" #include "mach_glue.h" struct port_bucket *device_bucket; struct port_class *dev_class; #define NUM_EMULATION num_emul #define MAX_NUM_EMULATION 32 /* List of emulations. */ static struct device_emulation_ops *emulation_list[MAX_NUM_EMULATION]; static int num_emul; boolean_t 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 = D_NO_SUCH_DEVICE; /* Open must be called on the master device port. */ if (!is_master_device (open_port)) return D_INVALID_OPERATION; /* There must be a reply port. */ if (! MACH_PORT_VALID (reply_port)) { fprintf (stderr, "ds_* invalid reply port\n"); return MIG_NO_REPLY; } /* Call each emulation's open routine to find the device. */ for (i = 0; i < NUM_EMULATION; 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) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; ret = (device->dev.emul_ops->close ? (*device->dev.emul_ops->close) (device->dev.emul_data) : D_SUCCESS); return ret; } 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) { io_return_t ret; if (data == 0) return D_INVALID_SIZE; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->write) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->write) (device->dev.emul_data, reply_port, reply_port_type, mode, recnum, data, count, bytes_written); return ret; } 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) { io_return_t ret; if (data == 0) return D_INVALID_SIZE; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->write_inband) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->write_inband) (device->dev.emul_data, reply_port, reply_port_type, mode, recnum, data, count, bytes_written); return ret; } 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) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->read) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->read) (device->dev.emul_data, reply_port, reply_port_type, mode, recnum, count, data, bytes_read); return ret; } 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) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->read_inband) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->read_inband) (device->dev.emul_data, reply_port, reply_port_type, mode, recnum, count, data, bytes_read); return ret; } 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) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->set_status) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->set_status) (device->dev.emul_data, flavor, status, status_count); return ret; } 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) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->get_status) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->get_status) (device->dev.emul_data, flavor, status, status_count); return ret; } io_return_t ds_device_set_filter (struct mach_device *device, mach_port_t receive_port, int priority, filter_t *filter, unsigned filter_count) { io_return_t ret; if (device == NULL) return D_NO_SUCH_DEVICE; if (! device->dev.emul_ops->set_filter) return D_INVALID_OPERATION; ret = (*device->dev.emul_ops->set_filter) (device->dev.emul_data, receive_port, priority, filter, filter_count); return ret; } 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 == NULL) return D_NO_SUCH_DEVICE; return D_INVALID_OPERATION; } error_t create_device_port (size_t size, void *result) { return ports_create_port (dev_class, device_bucket, size, result); } void mach_device_init() { int i; device_bucket = ports_create_bucket (); dev_class = ports_create_class (0, 0); for (i = 0; i < NUM_EMULATION; 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 reg_dev_emul (struct device_emulation_ops *ops) { emulation_list[num_emul++] = ops; } void * ds_server(void *arg) { /* This thread calls Linux functions, * so I need to make it known to the Linux environment. */ l4dde26_process_from_ddekit (ddekit_thread_myself ()); /* Launch. */ do { ports_manage_port_operations_one_thread (device_bucket, demuxer, 0); } while (1); return NULL; }