> -----Original Message----- > From: Sethi Varun-B16395 > Sent: Thursday, March 28, 2013 2:54 PM > To: j...@8bytes.org; Yoder Stuart-B08248; Wood Scott-B07421; > io...@lists.linux-foundation.org; linuxppc- > d...@lists.ozlabs.org; linux-ker...@vger.kernel.org; > ga...@kernel.crashing.org; b...@kernel.crashing.org > Cc: Sethi Varun-B16395 > Subject: [PATCH 5/5 v11] iommu/fsl: Freescale PAMU driver and iommu > implementation. > > 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> > --- > changes in v11: > - changed iova to dma_addr_t in iova_to_phys API. > changes in v10: > - Support for new guts compatibe string for T4 & B4 devices. > - Modified comment about port ID and mentioned the errata number. > - Fixed the issue where data pointer was not freed in case of a an error. > - Pass data pointer while freeing irq. > - Whle initializing the SPAACE entry clear the valid bit. > changes in v9: > - Merged and createad a single function to delete > a device from domain list. > - Refactored the add_device API code. > - Renamed the paace and spaace init fucntions. > - Renamed functions for mapping windows and subwindows. > - Changed the MAX LIODN value to MAX value u-boot can > program. > - Hard coded maximum number of subwindows. > changes in v8: > - implemented the new API for window based IOMMUs. > changes in v7: > - Set max_subwidows in the geometry attribute. > - Add checking for maximum supported LIODN value. > - Use upper_32_bits and lower_32_bits macros while > intializing PAMU data structures. > changes in v6: > - Simplified complex conditional statements. > - Fixed indentation issues. > - Added comments for IOMMU API implementation. > changes in v5: > - Addressed comments from Timur. > changes in v4: > - Addressed comments from Timur and Scott. > changes in v3: > - Addressed comments by Kumar Gala > - dynamic fspi allocation > - fixed alignment check in map and unmap > arch/powerpc/sysdev/fsl_pci.h | 5 + > drivers/iommu/Kconfig | 8 + > drivers/iommu/Makefile | 1 + > drivers/iommu/fsl_pamu.c | 1269 > +++++++++++++++++++++++++++++++++++++++ > drivers/iommu/fsl_pamu.h | 405 +++++++++++++ > drivers/iommu/fsl_pamu_domain.c | 1137 +++++++++++++++++++++++++++++++++++ > drivers/iommu/fsl_pamu_domain.h | 85 +++ > 7 files changed, 2910 insertions(+), 0 deletions(-) > create mode 100644 drivers/iommu/fsl_pamu.c > create mode 100644 drivers/iommu/fsl_pamu.h > create mode 100644 drivers/iommu/fsl_pamu_domain.c > create mode 100644 drivers/iommu/fsl_pamu_domain.h
Ack. Stuart _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
