Messages in this thread | | | Date | Thu, 8 Jul 2004 00:56:35 +0200 | From | Kronos <> | Subject | Re: Increasing IDE Channels |
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John W. Ross <programming@johnwross.com> ha scritto: > Greetings, > > I've spent several days working to increase the number of IDE channels above > the 10 allowed in the kernel. [cut] > Changed ide.h: > > IDE_NR_PORTS (10) > to > IDE_NR_PORTS (12) > > In major.h I added: > > #define IDE10_MAJOR 240 > #define IDE11_MAJOR 241 > > in ide.c I changed > > static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, > IDE2_MAJOR, IDE3_MAJOR, > IDE4_MAJOR, IDE5_MAJOR, > IDE6_MAJOR, IDE7_MAJOR, > IDE8_MAJOR, IDE9_MAJOR }; > > to : > > static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, > IDE2_MAJOR, IDE3_MAJOR, > IDE4_MAJOR, IDE5_MAJOR, > IDE6_MAJOR, IDE7_MAJOR, > IDE8_MAJOR, IDE9_MAJOR, > IDE10_MAJOR, IDE11_MAJOR) >
> 1.) Could someone please explain why there is a limit of 10 interfaces (is > this something that I shouldn't even try)?
Because hwifs are statically allocated, see drivers/ide/ide.c:
ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
Also if names are ide0..ide9, the following would be ide: and ide; (see init_hwif_data in drivers/ide/ide.c).
> 2.)What did I miss on moving to 12?
You can try and set MAX_HWIFS to 12 too (see include/asm-i386/ide.h), but you may find other problems.
I don't know ide layer very much, I'm sorry but I can't help you more.
Luca -- Home: http://kronoz.cjb.net Non capisco tutta questa eccitazione per il Multitasking: io sono anni che leggo in bagno. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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