cdparanoia patch for ahci(4)/siis(4)

[Alexander Motin]

Scott Long wrote:
> Juergen Lock wrote:
>> On Thu, Aug 06, 2009 at 10:07:15PM +0200, Juergen Lock wrote:
>>> On Thu, Aug 06, 2009 at 10:46:48PM +0300, Alexander Motin wrote:
>>>> Juergen Lock wrote:
>>>>> 2. cdda/dae seems to be broken entirely with ahci(4) as well as
>>>>> siis(4) (I remember a report about it being broken for usb optical
>>>>> drives too so maybe this is related?) - I tested with the
>>>>> audio/cdparanoia port as well as with
>>>>>     mplayer -cdrom-device /dev/cd{0,1} cdda://...
>>>>> (mplayer needs to be built with the libparanoia knob on for this) -
>>>>> this
>>>>> does work with atapicam(4) without ahci/siis so it can't be cd(4)'s
>>>>> fault alone.  On siis(4) it seems to just fail while on ahci(4) (I
>>>>> still
>>>>> have another optical drive on there, it's on the board's amd sb700)
>>>>> it causes the sata channel to be reset endlessly until I ^C mplayer:
>>>>>
>>>>>  Soo, anyone have ideas/patches/things they want me to check for this?
>>>> But this appeared to to be really trivial. cdparanoia uses extremely
>>>> simple method for detecting ATAPI devices - it checks that SIM is
>>>> named "ata". Trivial single line hack made it successfully play some
>>>> old AudioCD in SATA drive on SiI3132 controller for me, while I am
>>>> typing this. Probably we should invent better way to do this.
>>> Oooh! :)  I need to test this...
>>
>> Yup, works here too on siis and ahci with the following patch:
>> (maintainer Cc'd)
>>
>> Index: interface/scsi_interface.c
>> @@ -1480,9 +1480,12 @@
>>      /*
>>       * if the bus device name is `ata', we're (obviously)
>>       * running ATAPICAM.
>> +     * XXX same for the new ahci(4) and siis(4) drivers...
>>       */
>>  
>> -    if (strncmp(d->ccb->cpi.dev_name, "ata", 3) == 0) {
>> +    if (strncmp(d->ccb->cpi.dev_name, "ata", 3) == 0 ||
>> +        strncmp(d->ccb->cpi.dev_name, "ahcich", 6) == 0 ||
>> +        strncmp(d->ccb->cpi.dev_name, "siisch", 6) == 0) {
>>          cdmessage(d, "\tDrive is ATAPI (using ATAPICAM)\n");
>>          d->is_atapi = 1;
>>      } else {
>>
>>  Thanx, :)
>>     Juergen
> 
> This is fine for the moment, but unmaintainable in the long run as more
> and more drives are written.  cdparanoia needs to look at protocol and
> transport attributes, not device names.

CAM reports SCSI protocol for ATAPI devices at this moment. It is not
good probably. but changing it now may be painful. Checks like
	d->ccb->cpi.transport == XPORT_ATA ||
	d->ccb->cpi.transport == XPORT_SATA
should be for now. "ata" hack should also stay there for now, as
ATAPICAM emulates SCSI transport now, but not a new ATA one.

-- 
Alexander Motin