[PATCH 2/4 V5] MSI support on 83xx/85xx/86xx board
michael at ellerman.id.au
Mon May 19 12:08:30 EST 2008
On Fri, 2008-05-16 at 17:50 +0800, Jason Jin wrote:
> This MSI driver can be used on 83xx/85xx/86xx board.
> In this driver, virtual interrupt host and chip were
> setup. There are 256 MSI interrupts in this host, Every 32
> MSI interrupts cascaded to one IPIC/MPIC interrupt.
> The chip was treated as edge sensitive and some necessary
> functions were setup for this chip.
> Before using the MSI interrupt, PCI/PCIE device need to
> ask for a MSI interrupt in the 256 MSI interrupts. A 256bit
> bitmap show which MSI interrupt was used, reserve bit in
> the bitmap can be used to force the device use some designate
> MSI interrupt in the 256 MSI interrupts. Sometimes this is useful
> for testing the all the MSI interrupts. The msi-available-ranges
> property in the dts file was used for this purpose.
> Signed-off-by: Jason Jin <Jason.jin at freescale.com>
> In the V5 version:
> Make the msi-availble-ranges optional,
> remove the match function from the driver,
> change the compatible according the change in dts.
Looks good, MSI bits:
Acked-by: Michael Ellerman <michael at ellerman.id.au>
OzLabs, IBM Australia Development Lab
phone: +61 2 6212 1183 (tie line 70 21183)
We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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