Messages in this thread | | | From | Tabi Timur-B04825 <> | Subject | Re: [PATCH 4/4 v6] iommu/fsl: Freescale PAMU driver and IOMMU API implementation. | Date | Sat, 1 Dec 2012 22:58:20 +0000 |
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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 > (timur@freescale.com). > > Signed-off-by: Timur Tabi<timur@freescale.com> > Signed-off-by: Varun Sethi<Varun.Sethi@freescale.com> > ---
Acked-by: Timur Tabi <timur@freescale.com>
-- Timur Tabi Linux kernel developer at Freescale
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