Messages in this thread | | | Subject | Re: [PATCH 3/3 v2] iommu/fsl: Freescale PAMU driver and IOMMU API implementation. | From | Kumar Gala <> | Date | Thu, 4 Oct 2012 08:20:25 -0500 |
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On Oct 4, 2012, at 6:56 AM, <b16395@freescale.com> <b16395@freescale.com> wrote:
> From: Varun Sethi <Varun.Sethi@freescale.com> > > 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 LIOD 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 (timur@freescale.com). > > Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> > ---
I'm not seeing any of the comments I made addressed.
What changed in this version?
- k
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