Thanks Alex. > -----Original Message----- > From: Alex Williamson [mailto:alex.william...@redhat.com] > Sent: Monday, July 01, 2013 8:05 PM > To: Sethi Varun-B16395 > Cc: j...@8bytes.org; io...@lists.linux-foundation.org; linuxppc- > d...@lists.ozlabs.org; linux-ker...@vger.kernel.org; > b...@kernel.crashing.org; ga...@kernel.crashing.org; Yoder Stuart-B08248; > Wood Scott-B07421; Timur Tabi > Subject: Re: [PATCH 3/3 v18] iommu/fsl: Freescale PAMU driver and iommu > implementation. > > On Mon, 2013-07-01 at 15:41 +0530, Varun Sethi wrote: > > Following is a brief description of the PAMU hardware: > > PAMU determines what action to take and whether to authorize the > > action on the basis of the memory address, a Logical IO Device Number > > (LIODN), and PAACT table (logically) indexed by LIODN and address. > > Hardware devices which need to access memory must provide an LIODN in > addition to the memory address. > > > > Peripheral Access Authorization and Control Tables (PAACTs) are the > > primary data structures used by PAMU. A PAACT is a table of peripheral > > access authorization and control entries (PAACE).Each PAACE defines > > the range of I/O bus address space that is accessible by the LIOD and > > the associated access capabilities. > > > > There are two types of PAACTs: primary PAACT (PPAACT) and secondary > > PAACT (SPAACT).A given physical I/O device may be able to act as one > > or more independent logical I/O devices (LIODs). Each such logical I/O > > device is assigned an identifier called logical I/O device number > > (LIODN). A LIODN is allocated a contiguous portion of the I/O bus > > address space called the DSA window for performing DSA operations. The > > DSA window may optionally be divided into multiple sub-windows, each > > of which may be used to map to a region in system storage space. The > > first sub-window is referred to as the primary sub-window and the > remaining are called secondary sub-windows. > > > > This patch provides the PAMU driver (fsl_pamu.c) and the corresponding > > IOMMU API implementation (fsl_pamu_domain.c). The PAMU hardware driver > > (fsl_pamu.c) has been derived from the work done by Ashish Kalra and > Timur Tabi. > > > > Signed-off-by: Timur Tabi <ti...@tabi.org> > > Signed-off-by: Varun Sethi <varun.se...@freescale.com> > > --- > > For iommu group support > > Acked-by: Alex Williamson <alex.william...@redhat.com> >
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