Date: Wed, 29 May 2002 22:10:39 +0200 From: Richard Nyberg <rnyberg@it.su.se> To: freebsd-hackers@freebsd.org Subject: process hang in atprq state Message-ID: <20020529221039.A2602@gromit.it.su.se>
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Hi there.
I seem to have some problems with my cd read program.
I've attached a small prototype program that for some reason hangs
in atprq, even though I use a timeout of 5 seconds. The program reads
a cd in raw format using the MMC READ_CD command. It works fine :)
except that it never manages to finish because of the hang. The hang
doesn't seem to be linked to any specific place on the cd, but it might
be linked to my ignorance ;)
Though the program is hanging forever, the dvd-drive(SD-616F) is still
usable, eg. I can mount the cd in the drive or even start a second copy
of my program.
A trace of the hanging process from DDB reveals the following:
------------
db> tr 199
mi_switch(c1f8c480,c1de6d2c,0,d791bd2c,0) at mi_switch+0x174
tsleep(c1f8c480,10,c0266201,0,c4546101) at tsleep+0x19d
atapi_queue_cmd(c1de6d2c,c1fef80c,c2098000,5be0,11) at atapi_queue_cmd+0x13f
ataioctl(c02cefb0,c4546101,c1fef800,1,d478f1e0) at ataioctl+0x558
spec_ioctl(d791bde4,d791bdcc,c01efac9,d791bde4,d791be74) at spec_ioctl+0x26
spec_vnoperate(d791bde4,d791be74,c018265f,d791bde4,c200b000) at spec_vnoperate+0
x15
ufs_vnoperatespec(d791bde4,c200b000,0,454,c0294f60) at ufs_vnoperatespec+0x15
vn_ioctl(c200b000,c4546101,c1fef800,d478f1e0,d478f1e0) at vn_ioctl+0x10f
ioctl(d478f1e0,d791bf80,1,bfbffc3c,bfbffc44) at ioctl+0x20a
syscall2(2f,2f,2f,bfbffc44,bfbffc3c) at syscall2+0x1f5
Xint0x80_syscall() at Xint0x80_syscall+0x25
-------------
My program sends the CCB with the MMC to the device using the IOCATA
ioctl on /dev/ata. Is this the right API to use to do this or are there
some better way of doing it?
I've attached the source and dmesg.
I'm thankful for any help,
-Richard
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Content-Disposition: attachment; filename="tjo.c"
#include <sys/types.h>
#include <sys/ata.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define DATASIZE 2352
#define SUBSIZE 96
#ifdef READSUB
#define BLKSIZE (DATASIZE + SUBSIZE)
#else
#define BLKSIZE DATASIZE
#endif
#define NBLOCKS 10
int
main(void)
{
int dev, bin, sub;
int32_t lba, last_lba, sizes[2];
char data[BLKSIZE * NBLOCKS];
struct ata_cmd iocmd;
dev = open("/dev/ata", O_RDONLY);
if (dev == -1) {
perror("open");
return 1;
}
bin = open("out.bin", O_WRONLY | O_CREAT | O_TRUNC, 00644);
if (bin == -1) {
perror("open");
return 1;
}
#ifdef READSUB
sub = open("out.sub", O_WRONLY | O_CREAT | O_TRUNC, 00644);
if (sub == -1) {
perror("open");
return 1;
}
#endif
bzero(&iocmd, sizeof(struct ata_cmd));
iocmd.channel = 1;
iocmd.device = 0;
iocmd.cmd = ATAPICMD;
iocmd.u.atapi.flags = ATAPI_CMD_READ;
iocmd.u.atapi.data = (caddr_t *)sizes;
iocmd.u.atapi.count = 8;
iocmd.u.atapi.timeout = 5;
iocmd.u.atapi.ccb[0] = 0x25; /* READ_CAPACITY */
if (ioctl(dev, IOCATA, &iocmd) == -1) {
perror("capacity");
return 1;
}
if (iocmd.u.atapi.error) {
printf("ATAPI error: %d\n", iocmd.u.atapi.error);
return 1;
}
last_lba = ntohl(sizes[0]);
printf("capacity: %d\n", last_lba + 1);
for (lba = 0; lba <= last_lba; lba += NBLOCKS) {
int i;
int32_t blocks;
blocks = 1 + last_lba - lba;
if (blocks > NBLOCKS)
blocks = NBLOCKS;
bzero(data, BLKSIZE * NBLOCKS);
bzero(&iocmd, sizeof(struct ata_cmd));
iocmd.channel = 1;
iocmd.device = 0;
iocmd.cmd = ATAPICMD;
iocmd.u.atapi.flags = ATAPI_CMD_READ;
iocmd.u.atapi.data = (caddr_t *)data;
iocmd.u.atapi.count = BLKSIZE * NBLOCKS;
iocmd.u.atapi.timeout = 5;
iocmd.u.atapi.ccb[0] = 0xbe; /* ATAPI_READ_CD */
iocmd.u.atapi.ccb[1] = 0;
iocmd.u.atapi.ccb[2] = lba >> 24;
iocmd.u.atapi.ccb[3] = lba >> 16;
iocmd.u.atapi.ccb[4] = lba >> 8;
iocmd.u.atapi.ccb[5] = lba;
iocmd.u.atapi.ccb[8] = NBLOCKS;
iocmd.u.atapi.ccb[9] = 0xf8; /* SYNC & HEADERS & DATA & EDC */
#ifdef READSUB
iocmd.u.atapi.ccb[10] = 1;
#else
iocmd.u.atapi.ccb[10] = 0;
#endif
/* THE HANG OCCURS ON THE NEXT LINE */
if (ioctl(dev, IOCATA, &iocmd) == -1) {
perror("ioctl");
return 1;
}
if (iocmd.u.atapi.error) {
printf("ATAPI error: %d\n", iocmd.u.atapi.error);
return 1;
}
printf("read sector %d\r", lba);
fflush(stdout);
for (i = 0; i < blocks; i++) {
write(bin, data + i * BLKSIZE, DATASIZE);
#ifdef READSUB
write(sub, data + i * BLKSIZE + DATASIZE, SUBSIZE);
#endif
}
}
printf("\n");
return 0;
}
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Content-Disposition: attachment; filename="dmesg.txt"
Copyright (c) 1992-2002 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.6-RC #0: Sat May 25 14:33:36 CEST 2002
rnyberg@blackbox.home.nat:/usr/obj/usr/src/sys/BLACKBOX
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 1470007480 Hz
CPU: AMD Athlon(tm) XP 1700+ (1470.01-MHz 686-class CPU)
Origin = "AuthenticAMD" Id = 0x662 Stepping = 2
Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
AMD Features=0xc0480000<<b19>,AMIE,DSP,3DNow!>
real memory = 536805376 (524224K bytes)
avail memory = 518995968 (506832K bytes)
Preloaded elf kernel "kernel" at 0xc0345000.
Pentium Pro MTRR support enabled
Using $PIR table, 7 entries at 0xc00fdef0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI to PCI bridge (vendor=1106 device=b099)> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <NVidia model 0201 graphics accelerator> at 0.0 irq 11
pcm0: <Creative EMU10K1> port 0xd000-0xd01f irq 11 at device 9.0 on pci0
vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xd800-0xd8ff mem 0xe3000000-0xe30000ff irq 10 at device 12.0 on pci0
vr0: Ethernet address: 00:50:ba:1c:81:29
miibus0: <MII bus> on vr0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
isab0: <PCI to ISA bridge (vendor=1106 device=3074)> at device 17.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 8233 ATA100 controller> port 0xdc00-0xdc0f at device 17.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xe000-0xe01f irq 10 at device 17.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ums0: Logitech USB Mouse, rev 1.10/6.10, addr 2, iclass 3/1
ums0: 4 buttons and Z dir.
uhci1: <VIA 83C572 USB controller> port 0xe400-0xe41f irq 10 at device 17.3 on pci0
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <VIA 83C572 USB controller> port 0xe800-0xe81f irq 10 at device 17.4 on pci0
usb2: <VIA 83C572 USB controller> on uhci2
usb2: USB revision 1.0
uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
orm0: <Option ROM> at iomem 0xcc000-0xd3fff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ad0: 57241MB <ST360021A> [116301/16/63] at ata0-master UDMA100
acd0: DVD-ROM <SAMSUNG DVD-ROM SD-616F> at ata1-master UDMA33
acd1: CD-RW <12X8X32> at ata1-slave WDMA2
Mounting root from ufs:/dev/ad0s2a
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