Re: [PATCH 7/7] powerpc: Added PCI MSI support using the HSTA module

2014-02-24 Thread Alistair Popple
On Sat, 22 Feb 2014 07:41:26 Benjamin Herrenschmidt wrote: > On Fri, 2014-02-21 at 15:33 +0100, Arnd Bergmann wrote: [...] > > Should we (provided it's possible in HW) create two ranges instead ? One > covering RAM and one covering MSIs ? To avoid stray DMAs whacking random > HW registers in the

Re: [PATCH 7/7] powerpc: Added PCI MSI support using the HSTA module

2014-02-21 Thread Arnd Bergmann
On Friday 21 February 2014, Benjamin Herrenschmidt wrote: > On Fri, 2014-02-21 at 15:33 +0100, Arnd Bergmann wrote: > > > > @@ -242,8 +264,10 @@ > > > ranges = <0x0200 0x 0x8000 0x0110 > > > 0x8000 0x0 0x8000 > > > 0x01

Re: [PATCH 7/7] powerpc: Added PCI MSI support using the HSTA module

2014-02-21 Thread Benjamin Herrenschmidt
On Fri, 2014-02-21 at 15:33 +0100, Arnd Bergmann wrote: > > @@ -242,8 +264,10 @@ > > ranges = <0x0200 0x 0x8000 0x0110 > > 0x8000 0x0 0x8000 > > 0x0100 0x00x00x0140 > > 0x00x0 0x0001

Re: [PATCH 7/7] powerpc: Added PCI MSI support using the HSTA module

2014-02-21 Thread Arnd Bergmann
On Friday 21 February 2014 17:31:33 Alistair Popple wrote: > > + HSTA0: hsta@31e { > + compatible = "ibm,476gtr-hsta-msi", "ibm,hsta-msi"; > + reg = <0x310 0x000e 0x0 0xf0>; > + interrupt-parent = <&MPIC>; > +

[PATCH 7/7] powerpc: Added PCI MSI support using the HSTA module

2014-02-20 Thread Alistair Popple
The PPC476GTR SoC supports message signalled interrupts (MSI) by writing to special addresses within the High Speed Transfer Assist (HSTA) module. This patch adds support for PCI MSI with a new system device. The DMA window is also updated to allow access to the entire 42-bit address range to allo