ioctl32 on ppc64

[Juergen Kreileder <jk@blackdown.de>]

Hi,

I'm trying to get an Audigy NX working with a ppc64 kernel (2.6.9-rc1)
and 32-bit userland.  ALSA seems to work fine (except for dmix) with
32-bit kernels + 32-bit userland and 64-bit kernels + 64 userland.

With mixed a mixed 32-bit/64-bit environment I wasn't able to run
alsactl/amixer/alsamixer initially:

,----
| ioctl32(alsactl:2581): Unknown cmd fd(3) cmd(c2c85513){02} arg(ffffe6e0) on /dev/snd/controlC0
| ioctl32(amixer:2582): Unknown cmd fd(3) cmd(c2c85512){02} arg(ffffe180) on /dev/snd/controlC0
| ioctl32(alsactl:2584): Unknown cmd fd(3) cmd(c2c85513){02} arg(ffffe6e0) on /dev/snd/controlC0
`----

After removing the packed attribute from struct sndrv_ctl_elem_value32,
32-bit alsactl and alsamixer seem to work fine.

I also can play 48000 Hz wav files with 32-bit aplay now, but playing
41000 Hz stuff only works directly to hw:0,0 (sounds broken).
Doing rate conversion with a plugin defined in .asoundrc works for the
pure 32-bit and 64-bit cases but not for the mixed 32-bit/64-bit case,
it fails with "ALSA lib pcm_hw.c:549:(snd_pcm_hw_start)
SNDRV_PCM_IOCTL_START failed: Broken pipe":

,----
| $ aplay 44100.wav 
| Playing WAVE '44100.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
| ALSA lib pcm_hw.c:549:(snd_pcm_hw_start) SNDRV_PCM_IOCTL_START failed: Broken pipe
| Aborted by signal Interrupt...
| jk@fry:~$ aplay -v 44100.wav 
| Playing WAVE '44100.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
| Plug PCM: Rate conversion PCM (48000, sformat=S16_LE)
| Its setup is:
| stream       : PLAYBACK
| access       : RW_INTERLEAVED
| format       : S16_LE
| subformat    : STD
| channels     : 2
| rate         : 44100
| exact rate   : 44100 (44100/1)
| msbits       : 16
| buffer_size  : 15052
| period_size  : 3763
| period_time  : 85333
| tick_time    : 1000
| tstamp_mode  : NONE
| period_step  : 1
| sleep_min    : 0
| avail_min    : 3763
| xfer_align   : 3763
| start_threshold  : 15052
| stop_threshold   : 15052
| silence_threshold: 0
| silence_size : 0
| boundary     : 986447872
| Slave: Hardware PCM card 0 'SB Audigy 2 NX' device 0 subdevice 0
| 
| Its setup is:
| stream       : PLAYBACK
| access       : MMAP_INTERLEAVED
| format       : S16_LE
| subformat    : STD
| channels     : 2
| rate         : 48000
| exact rate   : 48000 (48000/1)
| msbits       : 16
| buffer_size  : 16384
| period_size  : 4096
| period_time  : 85333
| tick_time    : 1000
| tstamp_mode  : NONE
| period_step  : 1
| sleep_min    : 0
| avail_min    : 4096
| xfer_align   : 4096
| start_threshold  : 16384
| stop_threshold   : 16384
| silence_threshold: 0
| silence_size : 0
| boundary     : 0
| ALSA lib pcm_hw.c:549:(snd_pcm_hw_start) SNDRV_PCM_IOCTL_START failed: Broken pipe
| Aborted by signal Interrupt...
| $ strace aplay 44100.wav
| [...]
| ioctl(4, 0x40104132, 0xffffdf80)        = 0
| ioctl(4, 0x40104132, 0xffffdf80)        = 0
| mmap(NULL, 65536, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0) = 0x40027000
| shmget(IPC_PRIVATE, 61440, 0666)        = 16121856
| shmat(16121856, 0, 0)                   = 0x40037000
| shmctl(16121856, IPC_RMID, 0)           = 0
| ioctl(4, 0x20004140, 0xeb300000)        = 0
| ioctl(4, 0xc0684113, 0x1001fac4)        = 0
| read(3, "\1\0\377\377\1\0\377\377\0\0\0\0\0\0\1\0\377\377\0\0\0"..., 15052) = 15052
| read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\376\377\1\0\0\0\377\377"..., 15052) = 15052
| read(3, "\2\0\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 15052) = 15052
| read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\377\377\0\0\0"..., 15052) = 15052
| ioctl(4, 0x20004142, 0x1000)            = -1 EPIPE (Broken pipe)
| write(2, "ALSA lib pcm_hw.c:549:(snd_pcm_h"..., 41ALSA lib pcm_hw.c:549:(snd_pcm_hw_start) ) = 41
| write(2, "SNDRV_PCM_IOCTL_START failed", 28SNDRV_PCM_IOCTL_START failed) = 28
| write(2, ": Broken pipe", 13: Broken pipe)           = 13
| write(2, "\n", 1
| )                       = 1
| read(3, "\1\0\376\377\1\0\0\0\0\0\0\0\0\0\1\0\377\377\1\0\376\377"..., 15052) = 15052
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL, revents=POLLOUT}], 1, -1) = 1
| [...]
`----

Any idea?

BTW, is anybody working on a driver for the built-in soundcard of the
PowerMac G5?


        Juergen

--- sound/core/ioctl32/ioctl32.c.orig   2004-09-13 01:05:44.732947976 +0200
+++ sound/core/ioctl32/ioctl32.c        2004-09-13 01:10:53.208913840 +0200
@@ -246,7 +246,7 @@ struct sndrv_ctl_elem_value32 {
                struct sndrv_aes_iec958 iec958;
         } value;
         unsigned char reserved[128];
-} __attribute__((packed));
+};
 
 
 /* hmm, it's so hard to retrieve the value type from the control id.. */
=

-- 
Juergen Kreileder, Blackdown Java-Linux Team
http://www.blackdown.org/java-linux/java2-status/


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