Copy of libdriver for asynch interface to character drivers. Has to be cleaned
up.
This commit is contained in:
Philip Homburg
parent
404325b193
commit
bc125e3e1c
34
drivers/libdriver_asyn/Makefile
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34
drivers/libdriver_asyn/Makefile
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@ -0,0 +1,34 @@
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# Makefile for driver library
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# Directories
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u = /usr
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i = $u/include
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s = $i/sys
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b = $i/ibm
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m = $i/minix
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# Programs, flags, etc.
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CC = exec cc
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CFLAGS = -I$i $(CPROFILE)
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LDFLAGS = -i
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LIBS = -lsysutil -lsys
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LIB = libdriver.a
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OBJECTS = driver.o drvlib.o mq.o
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all build install: $(LIB)
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$(LIB): $(OBJECTS)
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ar rc $(LIB) $(OBJECTS)
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# $(CC) -c $@ $(LDFLAGS) $(OBJ) $(LIBS)
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clean:
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rm -f *.o *.bak *.a
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depend:
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mkdep "$(CC) -E $(CPPFLAGS)" *.c > .depend
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# Include generated dependencies.
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include .depend
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646
drivers/libdriver_asyn/driver.c
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646
drivers/libdriver_asyn/driver.c
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/* This file contains device independent device driver interface.
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*
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* Changes:
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* Jul 25, 2005 added SYS_SIG type for signals (Jorrit N. Herder)
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* Sep 15, 2004 added SYN_ALARM type for timeouts (Jorrit N. Herder)
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* Jul 23, 2004 removed kernel dependencies (Jorrit N. Herder)
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* Apr 02, 1992 constructed from AT wini and floppy driver (Kees J. Bot)
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*
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*
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* The drivers support the following operations (using message format m2):
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*
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* m_type DEVICE IO_ENDPT COUNT POSITION ADRRESS
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* ----------------------------------------------------------------
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* | DEV_OPEN | device | proc nr | | | |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_CLOSE | device | proc nr | | | |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_READ | device | proc nr | bytes | offset | buf ptr |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_WRITE | device | proc nr | bytes | offset | buf ptr |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_GATHER | device | proc nr | iov len | offset | iov ptr |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_SCATTER| device | proc nr | iov len | offset | iov ptr |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_IOCTL | device | proc nr |func code| | buf ptr |
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* |------------+---------+---------+---------+---------+---------|
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* | CANCEL | device | proc nr | r/w | | |
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* |------------+---------+---------+---------+---------+---------|
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* | HARD_STOP | | | | | |
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* |------------+---------+---------+---------+---------+---------|
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* | DEV_*_S | variants using safecopies of above |
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* ----------------------------------------------------------------
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*
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* The file contains one entry point:
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*
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* driver_task: called by the device dependent task entry
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*/
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#include "../drivers.h"
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#include <sys/ioc_disk.h>
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#include <minix/mq.h>
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#include "driver.h"
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#if (CHIP == INTEL)
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#if USE_EXTRA_DMA_BUF && DMA_BUF_SIZE < 2048
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/* A bit extra scratch for the Adaptec driver. */
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#define BUF_EXTRA (2048 - DMA_BUF_SIZE)
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#else
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#define BUF_EXTRA 0
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#endif
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/* Claim space for variables. */
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PRIVATE u8_t buffer[(unsigned) 2 * DMA_BUF_SIZE + BUF_EXTRA];
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u8_t *tmp_buf; /* the DMA buffer eventually */
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phys_bytes tmp_phys; /* phys address of DMA buffer */
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#else /* CHIP != INTEL */
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/* Claim space for variables. */
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u8_t tmp_buf[DMA_BUF_SIZE]; /* the DMA buffer */
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phys_bytes tmp_phys; /* phys address of DMA buffer */
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#endif /* CHIP != INTEL */
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FORWARD _PROTOTYPE( void init_buffer, (void) );
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FORWARD _PROTOTYPE( int do_rdwt, (struct driver *dr, message *mp, int safe) );
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FORWARD _PROTOTYPE( int do_vrdwt, (struct driver *dr, message *mp, int safe) );
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_PROTOTYPE( int asynsend, (endpoint_t dst, message *mp));
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int device_caller;
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PRIVATE mq_t *queue_head = NULL;
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/*===========================================================================*
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* driver_task *
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*===========================================================================*/
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PUBLIC void driver_task(dp)
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struct driver *dp; /* Device dependent entry points. */
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{
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/* Main program of any device driver task. */
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int r, proc_nr;
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message mess, reply_mess;
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/* Init MQ library. */
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mq_init();
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/* Get a DMA buffer. */
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init_buffer();
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/* Here is the main loop of the disk task. It waits for a message, carries
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* it out, and sends a reply.
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*/
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while (TRUE) {
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/* Any queued messages? Oldest are at the head. */
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if(queue_head) {
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mq_t *mq;
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mq = queue_head;
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memcpy(&mess, &mq->mq_mess, sizeof(mess));
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queue_head = queue_head->mq_next;
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mq_free(mq);
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} else {
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int s;
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/* Wait for a request to read or write a disk block. */
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if ((s=receive(ANY, &mess)) != OK)
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panic((*dp->dr_name)(),"receive() failed", s);
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}
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device_caller = mess.m_source;
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proc_nr = mess.IO_ENDPT;
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if (mess.m_type != SYN_ALARM && mess.m_type != DEV_PING &&
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mess.m_type != 4105 /* notify from TTY */ &&
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mess.m_type != DEV_SELECT &&
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mess.m_type != DEV_READ_S &&
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mess.m_type != DIAGNOSTICS_S &&
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mess.m_type != CANCEL)
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{
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printf("libdriver_asyn`driver_task: message %d\n",
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mess.m_type);
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}
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if (mess.m_type == DEV_SELECT)
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{
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static int first= 1;
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if (first)
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{
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first= 0;
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printf(
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"libdriver_asyn`driver_task: first DEV_SELECT: minor 0x%x, ops 0x%x\n",
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mess.DEVICE, mess.IO_ENDPT);
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}
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}
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/* Now carry out the work. */
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switch(mess.m_type) {
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case DEV_OPEN: r = (*dp->dr_open)(dp, &mess); break;
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case DEV_CLOSE: r = (*dp->dr_close)(dp, &mess); break;
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#ifdef DEV_IOCTL
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case DEV_IOCTL: r = (*dp->dr_ioctl)(dp, &mess, 0); break;
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#endif
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case DEV_IOCTL_S: r = (*dp->dr_ioctl)(dp, &mess, 1); break;
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case CANCEL: r = (*dp->dr_cancel)(dp, &mess);break;
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case DEV_SELECT: r = (*dp->dr_select)(dp, &mess);break;
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#ifdef DEV_READ
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case DEV_READ:
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case DEV_WRITE: r = do_rdwt(dp, &mess, 0); break;
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#endif
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case DEV_READ_S:
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case DEV_WRITE_S: r = do_rdwt(dp, &mess, 1); break;
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#ifdef DEV_GATHER
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case DEV_GATHER:
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case DEV_SCATTER: r = do_vrdwt(dp, &mess, 0); break;
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#endif
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case DEV_GATHER_S:
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case DEV_SCATTER_S: r = do_vrdwt(dp, &mess, 1); break;
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case HARD_INT: /* leftover interrupt or expired timer. */
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if(dp->dr_hw_int) {
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(*dp->dr_hw_int)(dp, &mess);
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}
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continue;
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case PROC_EVENT:
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case SYS_SIG: (*dp->dr_signal)(dp, &mess);
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continue; /* don't reply */
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case SYN_ALARM: (*dp->dr_alarm)(dp, &mess);
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continue; /* don't reply */
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case DEV_PING: notify(mess.m_source);
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continue;
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default:
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if(dp->dr_other)
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r = (*dp->dr_other)(dp, &mess, 0);
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else
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r = EINVAL;
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break;
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}
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/* Clean up leftover state. */
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(*dp->dr_cleanup)();
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/* Finally, prepare and send the reply message. */
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if (r != EDONTREPLY) {
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if (mess.m_type == DEV_OPEN)
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{
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reply_mess.m_type = DEV_REVIVE;
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reply_mess.REP_ENDPT = proc_nr;
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reply_mess.REP_STATUS = r;
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}
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else if (mess.m_type == DEV_CLOSE)
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{
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reply_mess.m_type = DEV_CLOSE_REPL;
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reply_mess.REP_ENDPT = proc_nr;
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reply_mess.REP_STATUS = r;
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}
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else if (mess.m_type == DEV_READ_S ||
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mess.m_type == DEV_WRITE_S)
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{
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if (r == SUSPEND)
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{
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printf(
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"driver_task: reviving %d with SUSPEND\n",
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proc_nr);
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}
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reply_mess.m_type = DEV_REVIVE;
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reply_mess.REP_ENDPT = proc_nr;
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reply_mess.REP_IO_GRANT = (cp_grant_id_t)mess.ADDRESS;
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reply_mess.REP_STATUS = r;
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}
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else if (mess.m_type == CANCEL)
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{
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continue; /* The original request should send a
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* reply.
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*/
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}
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else if (mess.m_type == DEV_SELECT)
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{
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reply_mess.m_type = DEV_SEL_REPL1;
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reply_mess.DEV_MINOR = mess.DEVICE;
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reply_mess.DEV_SEL_OPS = r;
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}
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else if (mess.m_type == DIAGNOSTICS_S)
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{
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if (device_caller == FS_PROC_NR)
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printf("driver_task: sending DIAG_REPL to FS\n");
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reply_mess.m_type = DIAG_REPL;
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reply_mess.REP_STATUS = r;
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}
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else
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{
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printf("driver_task: TASK_REPLY to req %d\n",
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mess.m_type);
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reply_mess.m_type = TASK_REPLY;
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reply_mess.REP_ENDPT = proc_nr;
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/* Status is # of bytes transferred or error code. */
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reply_mess.REP_STATUS = r;
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}
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r= asynsend(device_caller, &reply_mess);
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if (r != OK)
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{
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printf("driver_task: unable to asynsend to %d: %d\n",
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device_caller, r);
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}
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}
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}
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}
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/*===========================================================================*
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* init_buffer *
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*===========================================================================*/
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PRIVATE void init_buffer()
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{
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/* Select a buffer that can safely be used for DMA transfers. It may also
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* be used to read partition tables and such. Its absolute address is
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* 'tmp_phys', the normal address is 'tmp_buf'.
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*/
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#if (CHIP == INTEL)
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unsigned left;
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tmp_buf = buffer;
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sys_umap(SELF, D, (vir_bytes)buffer, (phys_bytes)sizeof(buffer), &tmp_phys);
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if ((left = dma_bytes_left(tmp_phys)) < DMA_BUF_SIZE) {
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/* First half of buffer crosses a 64K boundary, can't DMA into that */
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tmp_buf += left;
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tmp_phys += left;
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}
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#endif /* CHIP == INTEL */
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}
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/*===========================================================================*
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* do_rdwt *
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*===========================================================================*/
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PRIVATE int do_rdwt(dp, mp, safe)
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struct driver *dp; /* device dependent entry points */
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message *mp; /* pointer to read or write message */
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int safe; /* use safecopies? */
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{
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/* Carry out a single read or write request. */
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iovec_t iovec1;
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int r, opcode;
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phys_bytes phys_addr;
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u64_t position;
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/* Disk address? Address and length of the user buffer? */
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if (mp->COUNT < 0) return(EINVAL);
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/* Check the user buffer (not relevant for safe copies). */
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if(!safe) {
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sys_umap(mp->IO_ENDPT, D, (vir_bytes) mp->ADDRESS, mp->COUNT, &phys_addr);
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if (phys_addr == 0) return(EFAULT);
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}
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/* Prepare for I/O. */
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if ((*dp->dr_prepare)(mp->DEVICE) == NIL_DEV) return(ENXIO);
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/* Create a one element scatter/gather vector for the buffer. */
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if(
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#ifdef DEV_READ
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mp->m_type == DEV_READ ||
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#endif
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mp->m_type == DEV_READ_S) opcode = DEV_GATHER_S;
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else opcode = DEV_SCATTER_S;
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iovec1.iov_addr = (vir_bytes) mp->ADDRESS;
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iovec1.iov_size = mp->COUNT;
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/* Transfer bytes from/to the device. */
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position= make64(mp->POSITION, mp->HIGHPOS);
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r = (*dp->dr_transfer)(mp->IO_ENDPT, opcode, position, &iovec1, 1, safe);
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/* Return the number of bytes transferred or an error code. */
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return(r == OK ? (mp->COUNT - iovec1.iov_size) : r);
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}
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/*==========================================================================*
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* do_vrdwt *
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*==========================================================================*/
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PRIVATE int do_vrdwt(dp, mp, safe)
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struct driver *dp; /* device dependent entry points */
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message *mp; /* pointer to read or write message */
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int safe; /* use safecopies? */
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{
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/* Carry out an device read or write to/from a vector of user addresses.
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* The "user addresses" are assumed to be safe, i.e. FS transferring to/from
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* its own buffers, so they are not checked.
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*/
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static iovec_t iovec[NR_IOREQS];
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iovec_t *iov;
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phys_bytes iovec_size;
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unsigned nr_req;
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int r, j, opcode;
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u64_t position;
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nr_req = mp->COUNT; /* Length of I/O vector */
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{
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/* Copy the vector from the caller to kernel space. */
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if (nr_req > NR_IOREQS) nr_req = NR_IOREQS;
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iovec_size = (phys_bytes) (nr_req * sizeof(iovec[0]));
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if(safe) {
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if (OK != sys_safecopyfrom(mp->m_source, (vir_bytes) mp->IO_GRANT,
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0, (vir_bytes) iovec, iovec_size, D)) {
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panic((*dp->dr_name)(),"bad (safe) I/O vector by", mp->m_source);
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}
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} else {
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if (OK != sys_datacopy(mp->m_source, (vir_bytes) mp->ADDRESS,
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SELF, (vir_bytes) iovec, iovec_size)) {
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panic((*dp->dr_name)(),"bad I/O vector by", mp->m_source);
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}
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}
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iov = iovec;
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}
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/* Prepare for I/O. */
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if ((*dp->dr_prepare)(mp->DEVICE) == NIL_DEV) return(ENXIO);
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/* Transfer bytes from/to the device. */
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opcode = mp->m_type;
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position= make64(mp->POSITION, mp->HIGHPOS);
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r = (*dp->dr_transfer)(mp->IO_ENDPT, opcode, position, iov,
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nr_req, safe);
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/* Copy the I/O vector back to the caller. */
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if(safe) {
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if (OK != sys_safecopyto(mp->m_source, (vir_bytes) mp->IO_GRANT,
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0, (vir_bytes) iovec, iovec_size, D)) {
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panic((*dp->dr_name)(),"couldn't return I/O vector", mp->m_source);
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}
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} else {
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sys_datacopy(SELF, (vir_bytes) iovec,
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mp->m_source, (vir_bytes) mp->ADDRESS, iovec_size);
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}
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return(r);
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}
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/*===========================================================================*
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* no_name *
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*===========================================================================*/
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PUBLIC char *no_name()
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{
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/* Use this default name if there is no specific name for the device. This was
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* originally done by fetching the name from the task table for this process:
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* "return(tasktab[proc_number(proc_ptr) + NR_TASKS].name);", but currently a
|
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* real "noname" is returned. Perhaps, some system information service can be
|
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* queried for a name at a later time.
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*/
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static char name[] = "noname";
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return name;
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}
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/*============================================================================*
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* do_nop *
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*============================================================================*/
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PUBLIC int do_nop(dp, mp)
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struct driver *dp;
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message *mp;
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{
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/* Nothing there, or nothing to do. */
|
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|
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switch (mp->m_type) {
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case DEV_OPEN: return(ENODEV);
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case DEV_CLOSE: return(OK);
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case DEV_IOCTL_S:
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#ifdef DEV_IOCTL
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case DEV_IOCTL: return(ENOTTY);
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#endif
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default: printf("nop: ignoring code %d\n", mp->m_type); return(EIO);
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}
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}
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/*============================================================================*
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||||
* nop_ioctl *
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||||
*============================================================================*/
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PUBLIC int nop_ioctl(dp, mp, safe)
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struct driver *dp;
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message *mp;
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||||
int safe;
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||||
{
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return(ENOTTY);
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||||
}
|
||||
|
||||
/*============================================================================*
|
||||
* nop_signal *
|
||||
*============================================================================*/
|
||||
PUBLIC void nop_signal(dp, mp)
|
||||
struct driver *dp;
|
||||
message *mp;
|
||||
{
|
||||
/* Default action for signal is to ignore. */
|
||||
}
|
||||
|
||||
/*============================================================================*
|
||||
* nop_alarm *
|
||||
*============================================================================*/
|
||||
PUBLIC void nop_alarm(dp, mp)
|
||||
struct driver *dp;
|
||||
message *mp;
|
||||
{
|
||||
/* Ignore the leftover alarm. */
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* nop_prepare *
|
||||
*===========================================================================*/
|
||||
PUBLIC struct device *nop_prepare(device)
|
||||
{
|
||||
/* Nothing to prepare for. */
|
||||
return(NIL_DEV);
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* nop_cleanup *
|
||||
*===========================================================================*/
|
||||
PUBLIC void nop_cleanup()
|
||||
{
|
||||
/* Nothing to clean up. */
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* nop_cancel *
|
||||
*===========================================================================*/
|
||||
PUBLIC int nop_cancel(struct driver *dr, message *m)
|
||||
{
|
||||
/* Nothing to do for cancel. */
|
||||
return(OK);
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* nop_select *
|
||||
*===========================================================================*/
|
||||
PUBLIC int nop_select(struct driver *dr, message *m)
|
||||
{
|
||||
/* Nothing to do for select. */
|
||||
return(OK);
|
||||
}
|
||||
|
||||
/*============================================================================*
|
||||
* do_diocntl *
|
||||
*============================================================================*/
|
||||
PUBLIC int do_diocntl(dp, mp, safe)
|
||||
struct driver *dp;
|
||||
message *mp; /* pointer to ioctl request */
|
||||
int safe; /* addresses or grants? */
|
||||
{
|
||||
/* Carry out a partition setting/getting request. */
|
||||
struct device *dv;
|
||||
struct partition entry;
|
||||
int s;
|
||||
|
||||
if (mp->REQUEST != DIOCSETP && mp->REQUEST != DIOCGETP) {
|
||||
if(dp->dr_other) {
|
||||
return dp->dr_other(dp, mp, safe);
|
||||
} else return(ENOTTY);
|
||||
}
|
||||
|
||||
/* Decode the message parameters. */
|
||||
if ((dv = (*dp->dr_prepare)(mp->DEVICE)) == NIL_DEV) return(ENXIO);
|
||||
|
||||
if (mp->REQUEST == DIOCSETP) {
|
||||
/* Copy just this one partition table entry. */
|
||||
if(safe) {
|
||||
s=sys_safecopyfrom(mp->IO_ENDPT, (vir_bytes) mp->IO_GRANT,
|
||||
0, (vir_bytes) &entry, sizeof(entry), D);
|
||||
} else{
|
||||
s=sys_datacopy(mp->IO_ENDPT, (vir_bytes) mp->ADDRESS,
|
||||
SELF, (vir_bytes) &entry, sizeof(entry));
|
||||
}
|
||||
if(s != OK)
|
||||
return s;
|
||||
dv->dv_base = entry.base;
|
||||
dv->dv_size = entry.size;
|
||||
} else {
|
||||
/* Return a partition table entry and the geometry of the drive. */
|
||||
entry.base = dv->dv_base;
|
||||
entry.size = dv->dv_size;
|
||||
(*dp->dr_geometry)(&entry);
|
||||
if(safe) {
|
||||
s=sys_safecopyto(mp->IO_ENDPT, (vir_bytes) mp->IO_GRANT,
|
||||
0, (vir_bytes) &entry, sizeof(entry), D);
|
||||
} else {
|
||||
s=sys_datacopy(SELF, (vir_bytes) &entry,
|
||||
mp->IO_ENDPT, (vir_bytes) mp->ADDRESS, sizeof(entry));
|
||||
}
|
||||
if (OK != s)
|
||||
return s;
|
||||
}
|
||||
return(OK);
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* mq_queue *
|
||||
*===========================================================================*/
|
||||
PUBLIC int mq_queue(message *m)
|
||||
{
|
||||
mq_t *mq, *mi;
|
||||
|
||||
if(!(mq = mq_get()))
|
||||
panic("libdriver","mq_queue: mq_get failed", NO_NUM);
|
||||
memcpy(&mq->mq_mess, m, sizeof(mq->mq_mess));
|
||||
mq->mq_next = NULL;
|
||||
if(!queue_head) {
|
||||
queue_head = mq;
|
||||
} else {
|
||||
for(mi = queue_head; mi->mq_next; mi = mi->mq_next)
|
||||
;
|
||||
mi->mq_next = mq;
|
||||
}
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
||||
#define ASYN_NR 100
|
||||
PRIVATE asynmsg_t msgtable[ASYN_NR];
|
||||
PRIVATE int first_slot= 0, next_slot= 0;
|
||||
|
||||
PUBLIC int asynsend(dst, mp)
|
||||
endpoint_t dst;
|
||||
message *mp;
|
||||
{
|
||||
int r, src_ind, dst_ind;
|
||||
unsigned flags;
|
||||
|
||||
/* Update first_slot */
|
||||
for (; first_slot < next_slot; first_slot++)
|
||||
{
|
||||
flags= msgtable[first_slot].flags;
|
||||
if ((flags & (AMF_VALID|AMF_DONE)) == (AMF_VALID|AMF_DONE))
|
||||
{
|
||||
if (msgtable[first_slot].result != OK)
|
||||
{
|
||||
printf(
|
||||
"asynsend: found completed entry %d with error %d\n",
|
||||
first_slot,
|
||||
msgtable[first_slot].result);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if (flags != AMF_EMPTY)
|
||||
break;
|
||||
}
|
||||
|
||||
if (first_slot >= next_slot)
|
||||
{
|
||||
/* Reset first_slot and next_slot */
|
||||
next_slot= first_slot= 0;
|
||||
}
|
||||
|
||||
if (next_slot >= ASYN_NR)
|
||||
{
|
||||
/* Tell the kernel to stop processing */
|
||||
r= senda(NULL, 0);
|
||||
if (r != OK)
|
||||
panic(__FILE__, "asynsend: senda failed", r);
|
||||
|
||||
dst_ind= 0;
|
||||
for (src_ind= first_slot; src_ind<next_slot; src_ind++)
|
||||
{
|
||||
flags= msgtable[src_ind].flags;
|
||||
if ((flags & (AMF_VALID|AMF_DONE)) ==
|
||||
(AMF_VALID|AMF_DONE))
|
||||
{
|
||||
if (msgtable[src_ind].result != OK)
|
||||
{
|
||||
printf(
|
||||
"asynsend: found completed entry %d with error %d\n",
|
||||
src_ind,
|
||||
msgtable[src_ind].result);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if (flags == AMF_EMPTY)
|
||||
continue;
|
||||
#if 0
|
||||
printf("asynsend: copying entry %d to %d\n",
|
||||
src_ind, dst_ind);
|
||||
#endif
|
||||
if (src_ind != dst_ind)
|
||||
msgtable[dst_ind]= msgtable[src_ind];
|
||||
dst_ind++;
|
||||
}
|
||||
first_slot= 0;
|
||||
next_slot= dst_ind;
|
||||
if (next_slot >= ASYN_NR)
|
||||
panic(__FILE__, "asynsend: msgtable full", NO_NUM);
|
||||
}
|
||||
|
||||
msgtable[next_slot].dst= dst;
|
||||
msgtable[next_slot].msg= *mp;
|
||||
msgtable[next_slot].flags= AMF_VALID; /* Has to be last. The kernel
|
||||
* scans this table while we
|
||||
* are sleeping.
|
||||
*/
|
||||
next_slot++;
|
||||
|
||||
/* Tell the kernel to rescan the table */
|
||||
return senda(msgtable+first_slot, next_slot-first_slot);
|
||||
}
|
||||
|
||||
93
drivers/libdriver_asyn/driver.h
Normal file
93
drivers/libdriver_asyn/driver.h
Normal file
@ -0,0 +1,93 @@
|
||||
/* Types and constants shared between the generic and device dependent
|
||||
* device driver code.
|
||||
*/
|
||||
|
||||
#define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
|
||||
#define _MINIX 1 /* tell headers to include MINIX stuff */
|
||||
#define _SYSTEM 1 /* get negative error number in <errno.h> */
|
||||
|
||||
/* The following are so basic, all the *.c files get them automatically. */
|
||||
#include <minix/config.h> /* MUST be first */
|
||||
#include <ansi.h> /* MUST be second */
|
||||
#include <minix/type.h>
|
||||
#include <minix/ipc.h>
|
||||
#include <minix/com.h>
|
||||
#include <minix/callnr.h>
|
||||
#include <sys/types.h>
|
||||
#include <minix/const.h>
|
||||
#include <minix/syslib.h>
|
||||
#include <minix/sysutil.h>
|
||||
|
||||
#include <string.h>
|
||||
#include <limits.h>
|
||||
#include <stddef.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include <minix/partition.h>
|
||||
#include <minix/u64.h>
|
||||
|
||||
/* Info about and entry points into the device dependent code. */
|
||||
struct driver {
|
||||
_PROTOTYPE( char *(*dr_name), (void) );
|
||||
_PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr, int safe) );
|
||||
_PROTOTYPE( struct device *(*dr_prepare), (int device) );
|
||||
_PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, u64_t position,
|
||||
iovec_t *iov, unsigned nr_req, int safe) );
|
||||
_PROTOTYPE( void (*dr_cleanup), (void) );
|
||||
_PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
|
||||
_PROTOTYPE( void (*dr_signal), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr, int safe) );
|
||||
_PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
|
||||
};
|
||||
|
||||
#if (CHIP == INTEL)
|
||||
|
||||
/* Number of bytes you can DMA before hitting a 64K boundary: */
|
||||
#define dma_bytes_left(phys) \
|
||||
((unsigned) (sizeof(int) == 2 ? 0 : 0x10000) - (unsigned) ((phys) & 0xFFFF))
|
||||
|
||||
#endif /* CHIP == INTEL */
|
||||
|
||||
/* Base and size of a partition in bytes. */
|
||||
struct device {
|
||||
u64_t dv_base;
|
||||
u64_t dv_size;
|
||||
};
|
||||
|
||||
#define NIL_DEV ((struct device *) 0)
|
||||
|
||||
/* Functions defined by driver.c: */
|
||||
_PROTOTYPE( void driver_task, (struct driver *dr) );
|
||||
_PROTOTYPE( char *no_name, (void) );
|
||||
_PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( struct device *nop_prepare, (int device) );
|
||||
_PROTOTYPE( void nop_cleanup, (void) );
|
||||
_PROTOTYPE( void nop_task, (void) );
|
||||
_PROTOTYPE( void nop_signal, (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
|
||||
_PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr, int safe) );
|
||||
_PROTOTYPE( int nop_ioctl, (struct driver *dp, message *m_ptr, int safe) );
|
||||
_PROTOTYPE( int mq_queue, (message *m_ptr) );
|
||||
|
||||
/* Parameters for the disk drive. */
|
||||
#define SECTOR_SIZE 512 /* physical sector size in bytes */
|
||||
#define SECTOR_SHIFT 9 /* for division */
|
||||
#define SECTOR_MASK 511 /* and remainder */
|
||||
|
||||
/* Size of the DMA buffer buffer in bytes. */
|
||||
#define USE_EXTRA_DMA_BUF 0 /* usually not needed */
|
||||
#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
|
||||
|
||||
#if (CHIP == INTEL)
|
||||
extern u8_t *tmp_buf; /* the DMA buffer */
|
||||
#else
|
||||
extern u8_t tmp_buf[]; /* the DMA buffer */
|
||||
#endif
|
||||
extern phys_bytes tmp_phys; /* phys address of DMA buffer */
|
||||
199
drivers/libdriver_asyn/drvlib.c
Normal file
199
drivers/libdriver_asyn/drvlib.c
Normal file
@ -0,0 +1,199 @@
|
||||
/* IBM device driver utility functions. Author: Kees J. Bot
|
||||
* 7 Dec 1995
|
||||
* Entry point:
|
||||
* partition: partition a disk to the partition table(s) on it.
|
||||
*/
|
||||
|
||||
#include "driver.h"
|
||||
#include "drvlib.h"
|
||||
#include <unistd.h>
|
||||
|
||||
/* Extended partition? */
|
||||
#define ext_part(s) ((s) == 0x05 || (s) == 0x0F)
|
||||
|
||||
FORWARD _PROTOTYPE( void extpartition, (struct driver *dp, int extdev,
|
||||
unsigned long extbase) );
|
||||
FORWARD _PROTOTYPE( int get_part_table, (struct driver *dp, int device,
|
||||
unsigned long offset, struct part_entry *table));
|
||||
FORWARD _PROTOTYPE( void sort, (struct part_entry *table) );
|
||||
|
||||
#ifndef CD_SECTOR_SIZE
|
||||
#define CD_SECTOR_SIZE 2048
|
||||
#endif
|
||||
|
||||
/*============================================================================*
|
||||
* partition *
|
||||
*============================================================================*/
|
||||
PUBLIC void partition(dp, device, style, atapi)
|
||||
struct driver *dp; /* device dependent entry points */
|
||||
int device; /* device to partition */
|
||||
int style; /* partitioning style: floppy, primary, sub. */
|
||||
int atapi; /* atapi device */
|
||||
{
|
||||
/* This routine is called on first open to initialize the partition tables
|
||||
* of a device. It makes sure that each partition falls safely within the
|
||||
* device's limits. Depending on the partition style we are either making
|
||||
* floppy partitions, primary partitions or subpartitions. Only primary
|
||||
* partitions are sorted, because they are shared with other operating
|
||||
* systems that expect this.
|
||||
*/
|
||||
struct part_entry table[NR_PARTITIONS], *pe;
|
||||
int disk, par;
|
||||
struct device *dv;
|
||||
unsigned long base, limit, part_limit;
|
||||
|
||||
/* Get the geometry of the device to partition */
|
||||
if ((dv = (*dp->dr_prepare)(device)) == NIL_DEV
|
||||
|| cmp64u(dv->dv_size, 0) == 0) return;
|
||||
base = div64u(dv->dv_base, SECTOR_SIZE);
|
||||
limit = base + div64u(dv->dv_size, SECTOR_SIZE);
|
||||
|
||||
/* Read the partition table for the device. */
|
||||
if(!get_part_table(dp, device, 0L, table)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Compute the device number of the first partition. */
|
||||
switch (style) {
|
||||
case P_FLOPPY:
|
||||
device += MINOR_fd0p0;
|
||||
break;
|
||||
case P_PRIMARY:
|
||||
sort(table); /* sort a primary partition table */
|
||||
device += 1;
|
||||
break;
|
||||
case P_SUB:
|
||||
disk = device / DEV_PER_DRIVE;
|
||||
par = device % DEV_PER_DRIVE - 1;
|
||||
device = MINOR_d0p0s0 + (disk * NR_PARTITIONS + par) * NR_PARTITIONS;
|
||||
}
|
||||
|
||||
/* Find an array of devices. */
|
||||
if ((dv = (*dp->dr_prepare)(device)) == NIL_DEV) return;
|
||||
|
||||
/* Set the geometry of the partitions from the partition table. */
|
||||
for (par = 0; par < NR_PARTITIONS; par++, dv++) {
|
||||
/* Shrink the partition to fit within the device. */
|
||||
pe = &table[par];
|
||||
part_limit = pe->lowsec + pe->size;
|
||||
if (part_limit < pe->lowsec) part_limit = limit;
|
||||
if (part_limit > limit) part_limit = limit;
|
||||
if (pe->lowsec < base) pe->lowsec = base;
|
||||
if (part_limit < pe->lowsec) part_limit = pe->lowsec;
|
||||
|
||||
dv->dv_base = mul64u(pe->lowsec, SECTOR_SIZE);
|
||||
dv->dv_size = mul64u(part_limit - pe->lowsec, SECTOR_SIZE);
|
||||
|
||||
if (style == P_PRIMARY) {
|
||||
/* Each Minix primary partition can be subpartitioned. */
|
||||
if (pe->sysind == MINIX_PART)
|
||||
partition(dp, device + par, P_SUB, atapi);
|
||||
|
||||
/* An extended partition has logical partitions. */
|
||||
if (ext_part(pe->sysind))
|
||||
extpartition(dp, device + par, pe->lowsec);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*============================================================================*
|
||||
* extpartition *
|
||||
*============================================================================*/
|
||||
PRIVATE void extpartition(dp, extdev, extbase)
|
||||
struct driver *dp; /* device dependent entry points */
|
||||
int extdev; /* extended partition to scan */
|
||||
unsigned long extbase; /* sector offset of the base extended partition */
|
||||
{
|
||||
/* Extended partitions cannot be ignored alas, because people like to move
|
||||
* files to and from DOS partitions. Avoid reading this code, it's no fun.
|
||||
*/
|
||||
struct part_entry table[NR_PARTITIONS], *pe;
|
||||
int subdev, disk, par;
|
||||
struct device *dv;
|
||||
unsigned long offset, nextoffset;
|
||||
|
||||
disk = extdev / DEV_PER_DRIVE;
|
||||
par = extdev % DEV_PER_DRIVE - 1;
|
||||
subdev = MINOR_d0p0s0 + (disk * NR_PARTITIONS + par) * NR_PARTITIONS;
|
||||
|
||||
offset = 0;
|
||||
do {
|
||||
if (!get_part_table(dp, extdev, offset, table)) return;
|
||||
sort(table);
|
||||
|
||||
/* The table should contain one logical partition and optionally
|
||||
* another extended partition. (It's a linked list.)
|
||||
*/
|
||||
nextoffset = 0;
|
||||
for (par = 0; par < NR_PARTITIONS; par++) {
|
||||
pe = &table[par];
|
||||
if (ext_part(pe->sysind)) {
|
||||
nextoffset = pe->lowsec;
|
||||
} else
|
||||
if (pe->sysind != NO_PART) {
|
||||
if ((dv = (*dp->dr_prepare)(subdev)) == NIL_DEV) return;
|
||||
|
||||
dv->dv_base = mul64u(extbase + offset + pe->lowsec,
|
||||
SECTOR_SIZE);
|
||||
dv->dv_size = mul64u(pe->size, SECTOR_SIZE);
|
||||
|
||||
/* Out of devices? */
|
||||
if (++subdev % NR_PARTITIONS == 0) return;
|
||||
}
|
||||
}
|
||||
} while ((offset = nextoffset) != 0);
|
||||
}
|
||||
|
||||
/*============================================================================*
|
||||
* get_part_table *
|
||||
*============================================================================*/
|
||||
PRIVATE int get_part_table(dp, device, offset, table)
|
||||
struct driver *dp;
|
||||
int device;
|
||||
unsigned long offset; /* sector offset to the table */
|
||||
struct part_entry *table; /* four entries */
|
||||
{
|
||||
/* Read the partition table for the device, return true iff there were no
|
||||
* errors.
|
||||
*/
|
||||
iovec_t iovec1;
|
||||
u64_t position;
|
||||
static unsigned char partbuf[CD_SECTOR_SIZE];
|
||||
|
||||
position = mul64u(offset, SECTOR_SIZE);
|
||||
iovec1.iov_addr = (vir_bytes) partbuf;
|
||||
iovec1.iov_size = CD_SECTOR_SIZE;
|
||||
if ((*dp->dr_prepare)(device) != NIL_DEV) {
|
||||
(void) (*dp->dr_transfer)(SELF, DEV_GATHER_S, position, &iovec1, 1, 0);
|
||||
}
|
||||
if (iovec1.iov_size != 0) {
|
||||
return 0;
|
||||
}
|
||||
if (partbuf[510] != 0x55 || partbuf[511] != 0xAA) {
|
||||
/* Invalid partition table. */
|
||||
return 0;
|
||||
}
|
||||
memcpy(table, (partbuf + PART_TABLE_OFF), NR_PARTITIONS * sizeof(table[0]));
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*===========================================================================*
|
||||
* sort *
|
||||
*===========================================================================*/
|
||||
PRIVATE void sort(table)
|
||||
struct part_entry *table;
|
||||
{
|
||||
/* Sort a partition table. */
|
||||
struct part_entry *pe, tmp;
|
||||
int n = NR_PARTITIONS;
|
||||
|
||||
do {
|
||||
for (pe = table; pe < table + NR_PARTITIONS-1; pe++) {
|
||||
if (pe[0].sysind == NO_PART
|
||||
|| (pe[0].lowsec > pe[1].lowsec
|
||||
&& pe[1].sysind != NO_PART)) {
|
||||
tmp = pe[0]; pe[0] = pe[1]; pe[1] = tmp;
|
||||
}
|
||||
}
|
||||
} while (--n > 0);
|
||||
}
|
||||
27
drivers/libdriver_asyn/drvlib.h
Normal file
27
drivers/libdriver_asyn/drvlib.h
Normal file
@ -0,0 +1,27 @@
|
||||
/* IBM device driver definitions Author: Kees J. Bot
|
||||
* 7 Dec 1995
|
||||
*/
|
||||
|
||||
#include <ibm/partition.h>
|
||||
|
||||
_PROTOTYPE( void partition, (struct driver *dr, int device, int style, int atapi) );
|
||||
|
||||
/* BIOS parameter table layout. */
|
||||
#define bp_cylinders(t) (* (u16_t *) (&(t)[0]))
|
||||
#define bp_heads(t) (* (u8_t *) (&(t)[2]))
|
||||
#define bp_reduced_wr(t) (* (u16_t *) (&(t)[3]))
|
||||
#define bp_precomp(t) (* (u16_t *) (&(t)[5]))
|
||||
#define bp_max_ecc(t) (* (u8_t *) (&(t)[7]))
|
||||
#define bp_ctlbyte(t) (* (u8_t *) (&(t)[8]))
|
||||
#define bp_landingzone(t) (* (u16_t *) (&(t)[12]))
|
||||
#define bp_sectors(t) (* (u8_t *) (&(t)[14]))
|
||||
|
||||
/* Miscellaneous. */
|
||||
#define DEV_PER_DRIVE (1 + NR_PARTITIONS)
|
||||
#define MINOR_t0 64
|
||||
#define MINOR_r0 120
|
||||
#define MINOR_d0p0s0 128
|
||||
#define MINOR_fd0p0 (28<<2)
|
||||
#define P_FLOPPY 0
|
||||
#define P_PRIMARY 1
|
||||
#define P_SUB 2
|
||||
61
drivers/libdriver_asyn/mq.c
Normal file
61
drivers/libdriver_asyn/mq.c
Normal file
@ -0,0 +1,61 @@
|
||||
/*
|
||||
inet/mq.c
|
||||
|
||||
Created: Jan 3, 1992 by Philip Homburg
|
||||
|
||||
Copyright 1995 Philip Homburg
|
||||
*/
|
||||
|
||||
#include <ansi.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include <minix/config.h>
|
||||
#include <minix/const.h>
|
||||
#include <minix/type.h>
|
||||
#include <minix/ipc.h>
|
||||
#include <minix/mq.h>
|
||||
|
||||
#define MQ_SIZE 128
|
||||
|
||||
PRIVATE mq_t mq_list[MQ_SIZE];
|
||||
PRIVATE mq_t *mq_freelist;
|
||||
|
||||
void mq_init()
|
||||
{
|
||||
int i;
|
||||
|
||||
mq_freelist= NULL;
|
||||
for (i= 0; i<MQ_SIZE; i++)
|
||||
{
|
||||
mq_list[i].mq_next= mq_freelist;
|
||||
mq_freelist= &mq_list[i];
|
||||
mq_list[i].mq_allocated= 0;
|
||||
}
|
||||
}
|
||||
|
||||
mq_t *mq_get()
|
||||
{
|
||||
mq_t *mq;
|
||||
|
||||
mq= mq_freelist;
|
||||
assert(mq != NULL);
|
||||
|
||||
mq_freelist= mq->mq_next;
|
||||
mq->mq_next= NULL;
|
||||
assert(mq->mq_allocated == 0);
|
||||
mq->mq_allocated= 1;
|
||||
return mq;
|
||||
}
|
||||
|
||||
void mq_free(mq)
|
||||
mq_t *mq;
|
||||
{
|
||||
mq->mq_next= mq_freelist;
|
||||
mq_freelist= mq;
|
||||
assert(mq->mq_allocated == 1);
|
||||
mq->mq_allocated= 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* $PchId: mq.c,v 1.7 1998/10/23 20:10:47 philip Exp $
|
||||
*/
|
||||
Loading…
x
Reference in New Issue
Block a user