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Re: [PATCH 0/6] MSI portability cleanups

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From: Paul Mackerras
Subject: Re: [PATCH 0/6] MSI portability cleanups
Date: Monday, January 29, 2007 - 4:29 pm

Michael Ellerman writes:


It appears that the HV does not prevent us from reading or writing any
config space registers for functions that are assigned to us.


It's possible that the device can do MSI(X), but that using MSI(X)
requires other platform resources (e.g. interrupt source numbers) and
there are none free.  I believe the platform guarantees a minimum
number of MSI(X) interrupts per function, but a pci_enable_msix() call
may not be able to give the driver as many MSI-X interrupts as it is
requesting even if the function can handle that many.

Paul.
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Messages in current thread:
[PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 12:40 pm)
[PATCH 1/6] msi: Kill msi_lookup_irq, Eric W. Biederman, (Sun Jan 28, 12:42 pm)
[PATCH 2/6] msi: Remove msi_lock., Eric W. Biederman, (Sun Jan 28, 12:44 pm)
[PATCH 3/6] msi: Fix msi_remove_pci_irq_vectors., Eric W. Biederman, (Sun Jan 28, 12:45 pm)
[PATCH 4/6] msi: Remove attach_msi_entry., Eric W. Biederman, (Sun Jan 28, 12:47 pm)
[PATCH 5/6] msi: Kill the msi_desc array., Eric W. Biederman, (Sun Jan 28, 12:52 pm)
[PATCH 6/6] msi: Make MSI useable more architectures, Eric W. Biederman, (Sun Jan 28, 12:56 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Sun Jan 28, 1:23 pm)
Re: [PATCH 0/6] MSI portability cleanups, Jeff Garzik, (Sun Jan 28, 1:47 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 2:20 pm)
Re: [PATCH 0/6] MSI portability cleanups, Ingo Molnar, (Sun Jan 28, 2:26 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 2:34 pm)
Re: [PATCH 1/6] msi: Kill msi_lookup_irq, Paul Mackerras, (Sun Jan 28, 3:01 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Sun Jan 28, 3:09 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 3:11 pm)
Re: [PATCH 1/6] msi: Kill msi_lookup_irq, Eric W. Biederman, (Sun Jan 28, 3:18 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 4:26 pm)
Re: [PATCH 0/6] MSI portability cleanups, David Miller, (Sun Jan 28, 4:37 pm)
Re: [PATCH 0/6] MSI portability cleanups, David Miller, (Sun Jan 28, 4:42 pm)
Re: [PATCH 0/6] MSI portability cleanups, David Miller, (Sun Jan 28, 4:44 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Sun Jan 28, 6:33 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 10:18 pm)
Re: [PATCH 0/6] MSI portability cleanups, David Miller, (Sun Jan 28, 10:25 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Sun Jan 28, 10:58 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Sun Jan 28, 11:05 pm)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Mon Jan 29, 1:28 am)
Re: [PATCH 0/6] MSI portability cleanups, Eric W. Biederman, (Mon Jan 29, 2:03 am)
Re: [PATCH 0/6] MSI portability cleanups, Michael Ellerman, (Mon Jan 29, 3:11 am)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Mon Jan 29, 1:22 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Mon Jan 29, 1:32 pm)
Re: [PATCH 0/6] MSI portability cleanups, Paul Mackerras, (Mon Jan 29, 4:05 pm)
Re: [PATCH 0/6] MSI portability cleanups, Paul Mackerras, (Mon Jan 29, 4:29 pm)
Re: [PATCH 0/6] MSI portability cleanups, Benjamin Herrenschmidt, (Mon Jan 29, 4:40 pm)
Re: [PATCH 0/6] MSI portability cleanups, Segher Boessenkool, (Tue Jan 30, 12:32 pm)
Re: [PATCH 0/6] MSI portability cleanups, Greg KH, (Wed Jan 31, 9:29 pm)