| Message ID | 1519062520-198902-1-git-send-email-john.garry@huawei.com |
|---|---|
| Headers | show |
| Series | LPC: legacy ISA I/O support | expand |
On Mon, Feb 19, 2018 at 7:48 PM, John Garry <john.garry@huawei.com> wrote: > This patchset supports the IPMI-bt device attached to the Low-Pin-Count > interface implemented on Hisilicon Hip06/Hip07 SoC. > ----------- > | LPC host| > | | > ----------- > | > _____________V_______________LPC > | | > V V > ------------ > | BT(ipmi)| > ------------ > > When master accesses those peripherals beneath the Hip06/Hip07 LPC, a specific > LPC driver is needed to make LPC host generate the standard LPC I/O cycles with > the target peripherals'I/O port addresses. But on curent arm64 world, there is > no real I/O accesses. All the I/O operations through in/out accessors are based > on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed through driver > specific accessors rather than MMIO. > To solve this issue and keep the relevant existing peripherals' drivers untouched, > this patchset: > - introduces a generic I/O space management framework, logical PIO, to support > I/O operations on host controllers operating either on MMIO buses or on buses > requiring specific driver I/O accessors; > - redefines the in/out accessors to provide a unified interface for both MMIO > and driver specific I/O operations. Using logical PIO, th call of in/out() from > the host children drivers, such as ipmi-si, will be redirected to the > corresponding device-specific I/O hooks to perform the I/O accesses. > > Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC peripherals can > be supported without any changes on the existing ipmi-si driver. > > The whole patchset has been tested on Hip07 D05 board both using DTB and ACPI. > > Differences to v13: > - dropped ACPI scan handler and added patch to not enumerate children > of indirect IO hosts in ACPI code > - tidied up logic_pio.c a bit for kerneldoc and made some APIs clearer > to understand > - tided (and simplified) hisi_lpc.c and added new ACPI probe code > (same as previous ACPI scan handler code, so comments from Rafael > and Andy included) > - reinstated PCI range upper limit check in pci_pio_to_address() > - dropped Dann Frazier's "tested-by" tag in light of changes > - rebase to linuxnext 20180219 (had to fix locally arm64 build issue) > Some minor comments per patches, otherwise FWIW Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Differences to v12: > - Addressed ACPI comments from Rafael and Andy, including: > - added SPDX license identifiers (other new files in the series got this also) > - fixed style issues, like superflous newlines and symbol naming > - add fuller acpi_indirectio.c patch commit message > - dropped acpi_indirectio_host_data (author's decision) to simplify > - added Rob Herring's tag > - rebase to linux-next 20180212 > > Differences to v11: > - fixed build errors for i386, m68k, and tile > - added a comment in LPC driver commit log why we set > the kernel config as bool > - some tidying logic_pio code > > Differences to v10: > - dropped CONFIG_LOGIC_PIO. Reason is that CONFIG_PCI > depends on this, and CONFIG_PCI is a per-arch CONFIG. > So we would require all arch's kconfig to select this. > - Addressed Dann Frazier's comments on LPC driver, and > sopme other cleanup > - Moved logic_pio.h to be included in generic asm io.h > - Fixed ACPI indirect IO host setup to handle >1 child > - Relocated ACPI indirect IO host setup code to > drivers/acpi > - Rebased to linux next-20180118 > > Changes from v9: > - patch 2 has been split into 3 patches according to Bjorn comments on > v9 thread > - patch 1 has been reworked accordign to Bjorn comments on v9 > - now logic_pio_trans_hwaddr() has a sanity check to make sure the resource > size fits into the assigned range > - in patch 5 the MFD framework has been used to probe the LPC children > according to the suggestion from Mika Westerberg > - Maintaner has changed to Huawei Linuxarm mailing list > > Changes from v8: > - Simplified LIB IO framewrok > - Moved INDIRECT PIO ACPI framework under acpi/arm64 > - Renamed occurrences of "lib io" and "indirect io" to "lib pio" and > "indirect pio" to keep the patchset nomenclature consistent > - Removed Alignment reuqirements > - Moved LPC specific code out of ACPI common framework > - Now PIO indirect HW ranges can overlap > - Changed HiSilicon LPC driver maintainer (Gabriele Paoloni now) and split > maintaner file modifications in a separate commit > - Removed the commit with the DT nodes support for hip06 and hip07 (to be > pushed separately) > - Added a checking on ioport_map() not to break that function as Arnd points > out in V7 review thread; > - fixed the compile issues on alpha, m68k; > > Changes from V7: > - Based on Arnd's comment, rename the LIBIO as LOGIC_PIO; > - Improved the mapping process in LOGIC_PIO to gain better efficiency when > redirecting the I/O accesses to right device driver; > - To reduce the impact on PCI MMIO to a minimum, add a new > CONFIG_INDIRECT_PIO for indirect-IO hosts/devices; > - Added a new ACPI handler for indirect-IO hosts/devices; > - Fixed the compile issues on V6; > > Changes from V6: > - According to the comments from Bjorn and Alex, merge PCI IO and indirect-IO > into a generic I/O space management, LIBIO; > - Adopted the '_DEP' to replace the platform bus notifier. In this way, we can > ensure the LPC peripherals' I/O resources had been translated to logical IO > before the LPC peripheral enumeration; > - Replaced the rwlock with rcu list based on Alex's suggestion; > - Applied relaxed write/read to LPC driver; > - Some bugs fixing and some optimazations based on the comments of V6; > > Changes from V5: > - Made the extio driver more generic and locate in lib/; > - Supported multiple indirect-IO bus instances; > - Extended the pci_register_io_range() to support indirect-IO, then dropped > the I/O reservation used in previous patchset; > - Reimplemented the ACPI LPC support; > - Fixed some bugs, including the compile error on other archs, the module > building failure found by Ming Lei, etc; > > Changes from V4: > - Some revises based on the comments from Bjorn, Rob on V4; > - Fixed the compile error on some platforms, such as openrisc; > > Changes from V3: > - UART support deferred to a separate patchset; This patchset only support > ipmi device under LPC; > - LPC bus I/O range is fixed to 0 ~ (PCIBIOS_MIN_IO - 1), which is separeted > from PCI/PCIE PIO space; > - Based on Arnd's remarks, removed the ranges property from Hip06 lpc dts and > added a new fixup function, of_isa_indirect_io(), to get the I/O address > directly from LPC dts configurations; > - Support in(w,l)/out(w,l) for Hip06 lpc I/O; > - Decouple the header file dependency on the gerenic io.h by defining in/out > as normal functions in c file; > - removed unused macro definitions in the LPC driver; > > Changes from V2: > - Support the PIO retrieval from the linux PIO generated by > pci_address_to_pio. This method replace the 4K PIO reservation in V2; > - Support the flat-tree earlycon; > - Some revises based on Arnd's remarks; > - Make sure the linux PIO range allocated to Hip06 LPC peripherals starts > from non-ZERO; > > Changes from V1: > - Support the ACPI LPC device; > - Optimize the dts LPC driver in ISA compatible mode; > - Reserve the IO range below 4K in avoid the possible conflict with PCI host > IO ranges; > - Support the LPC uart and relevant earlycon; > > V13 thread here: https://lkml.org/lkml/2018/2/13/744 > V12 thread here: https://lkml.org/lkml/2018/1/23/508 > V11 thread here: https://lkml.org/lkml/2018/1/21/38 > V10 thread here: https://lkml.org/lkml/2017/10/27/465 > V9 thread here: https://lkml.org/lkml/2017/5/25/263 > V8 thread here: https://lkml.org/lkml/2017/3/30/619 > V7 thread here: https://lkml.org/lkml/2017/3/12/279 > v6 thread here: https://lkml.org/lkml/2017/1/24/25 > v5 thread here: https://lkml.org/lkml/2016/11/7/955 > v4 thread here: https://lkml.org/lkml/2016/10/20/149 > v3 thread here: https://lkml.org/lkml/2016/9/14/326 > v2 thread here: https://lkml.org/lkml/2016/9/7/356 > v1 thread here: https://lkml.org/lkml/2015/12/29/154 > > Gabriele Paoloni (2): > PCI: Remove unused __weak attribute in pci_register_io_range() > PCI: Add fwnode handler as input param of pci_register_io_range() > > John Garry (3): > ACPI / scan: do not enumerate Indirect IO host children > HISI LPC: Add ACPI support > MAINTAINERS: Add maintainer for HiSilicon LPC driver > > Zhichang Yuan (4): > LIB: Introduce a generic PIO mapping method > PCI: Apply the new generic I/O management on PCI IO hosts > OF: Add missing I/O range exception for indirect-IO devices > HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings > > .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ > MAINTAINERS | 7 + > drivers/acpi/pci_root.c | 8 +- > drivers/acpi/scan.c | 14 + > drivers/bus/Kconfig | 8 + > drivers/bus/Makefile | 1 + > drivers/bus/hisi_lpc.c | 646 +++++++++++++++++++++ > drivers/of/address.c | 96 ++- > drivers/pci/pci.c | 95 +-- > include/asm-generic/io.h | 4 +- > include/linux/logic_pio.h | 131 +++++ > include/linux/pci.h | 3 +- > lib/Kconfig | 15 + > lib/Makefile | 2 + > lib/logic_pio.c | 285 +++++++++ > 15 files changed, 1250 insertions(+), 98 deletions(-) > create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt > create mode 100644 drivers/bus/hisi_lpc.c > create mode 100644 include/linux/logic_pio.h > create mode 100644 lib/logic_pio.c > > -- > 1.9.1 >
On 20/02/2018 14:54, Andy Shevchenko wrote: > On Mon, Feb 19, 2018 at 7:48 PM, John Garry <john.garry@huawei.com> wrote: >> > This patchset supports the IPMI-bt device attached to the Low-Pin-Count >> > interface implemented on Hisilicon Hip06/Hip07 SoC. >> > ----------- >> > | LPC host| >> > | | >> > ----------- >> > | >> > _____________V_______________LPC >> > | | >> > V V >> > ------------ >> > | BT(ipmi)| >> > ------------ >> > >> > When master accesses those peripherals beneath the Hip06/Hip07 LPC, a specific >> > LPC driver is needed to make LPC host generate the standard LPC I/O cycles with >> > the target peripherals'I/O port addresses. But on curent arm64 world, there is >> > no real I/O accesses. All the I/O operations through in/out accessors are based >> > on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed through driver >> > specific accessors rather than MMIO. >> > To solve this issue and keep the relevant existing peripherals' drivers untouched, >> > this patchset: >> > - introduces a generic I/O space management framework, logical PIO, to support >> > I/O operations on host controllers operating either on MMIO buses or on buses >> > requiring specific driver I/O accessors; >> > - redefines the in/out accessors to provide a unified interface for both MMIO >> > and driver specific I/O operations. Using logical PIO, th call of in/out() from >> > the host children drivers, such as ipmi-si, will be redirected to the >> > corresponding device-specific I/O hooks to perform the I/O accesses. >> > >> > Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC peripherals can >> > be supported without any changes on the existing ipmi-si driver. >> > >> > The whole patchset has been tested on Hip07 D05 board both using DTB and ACPI. >> > >> > Differences to v13: >> > - dropped ACPI scan handler and added patch to not enumerate children >> > of indirect IO hosts in ACPI code >> > - tidied up logic_pio.c a bit for kerneldoc and made some APIs clearer >> > to understand >> > - tided (and simplified) hisi_lpc.c and added new ACPI probe code >> > (same as previous ACPI scan handler code, so comments from Rafael >> > and Andy included) >> > - reinstated PCI range upper limit check in pci_pio_to_address() >> > - dropped Dann Frazier's "tested-by" tag in light of changes >> > - rebase to linuxnext 20180219 (had to fix locally arm64 build issue) >> > > Some minor comments per patches, otherwise FWIW > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Thanks, the comments in the other 2 patches I did not reply to are ok. John
On Tue, Feb 20, 2018 at 01:48:31AM +0800, John Garry wrote: > This patchset supports the IPMI-bt device attached to the Low-Pin-Count > interface implemented on Hisilicon Hip06/Hip07 SoC. > ----------- > | LPC host| > | | > ----------- > | > _____________V_______________LPC > | | > V V > ------------ > | BT(ipmi)| > ------------ > > When master accesses those peripherals beneath the Hip06/Hip07 LPC, a specific > LPC driver is needed to make LPC host generate the standard LPC I/O cycles with > the target peripherals'I/O port addresses. But on curent arm64 world, there is > no real I/O accesses. All the I/O operations through in/out accessors are based > on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed through driver > specific accessors rather than MMIO. > To solve this issue and keep the relevant existing peripherals' drivers untouched, > this patchset: > - introduces a generic I/O space management framework, logical PIO, to support > I/O operations on host controllers operating either on MMIO buses or on buses > requiring specific driver I/O accessors; > - redefines the in/out accessors to provide a unified interface for both MMIO > and driver specific I/O operations. Using logical PIO, th call of in/out() from > the host children drivers, such as ipmi-si, will be redirected to the > corresponding device-specific I/O hooks to perform the I/O accesses. > > Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC peripherals can > be supported without any changes on the existing ipmi-si driver. > > The whole patchset has been tested on Hip07 D05 board both using DTB and ACPI. > > Differences to v13: > - dropped ACPI scan handler and added patch to not enumerate children > of indirect IO hosts in ACPI code > - tidied up logic_pio.c a bit for kerneldoc and made some APIs clearer > to understand > - tided (and simplified) hisi_lpc.c and added new ACPI probe code > (same as previous ACPI scan handler code, so comments from Rafael > and Andy included) > - reinstated PCI range upper limit check in pci_pio_to_address() > - dropped Dann Frazier's "tested-by" tag in light of changes > - rebase to linuxnext 20180219 (had to fix locally arm64 build issue) > > Differences to v12: > - Addressed ACPI comments from Rafael and Andy, including: > - added SPDX license identifiers (other new files in the series got this also) > - fixed style issues, like superflous newlines and symbol naming > - add fuller acpi_indirectio.c patch commit message > - dropped acpi_indirectio_host_data (author's decision) to simplify > - added Rob Herring's tag > - rebase to linux-next 20180212 > > Differences to v11: > - fixed build errors for i386, m68k, and tile > - added a comment in LPC driver commit log why we set > the kernel config as bool > - some tidying logic_pio code > > Differences to v10: > - dropped CONFIG_LOGIC_PIO. Reason is that CONFIG_PCI > depends on this, and CONFIG_PCI is a per-arch CONFIG. > So we would require all arch's kconfig to select this. > - Addressed Dann Frazier's comments on LPC driver, and > sopme other cleanup > - Moved logic_pio.h to be included in generic asm io.h > - Fixed ACPI indirect IO host setup to handle >1 child > - Relocated ACPI indirect IO host setup code to > drivers/acpi > - Rebased to linux next-20180118 > > Changes from v9: > - patch 2 has been split into 3 patches according to Bjorn comments on > v9 thread > - patch 1 has been reworked accordign to Bjorn comments on v9 > - now logic_pio_trans_hwaddr() has a sanity check to make sure the resource > size fits into the assigned range > - in patch 5 the MFD framework has been used to probe the LPC children > according to the suggestion from Mika Westerberg > - Maintaner has changed to Huawei Linuxarm mailing list > > Changes from v8: > - Simplified LIB IO framewrok > - Moved INDIRECT PIO ACPI framework under acpi/arm64 > - Renamed occurrences of "lib io" and "indirect io" to "lib pio" and > "indirect pio" to keep the patchset nomenclature consistent > - Removed Alignment reuqirements > - Moved LPC specific code out of ACPI common framework > - Now PIO indirect HW ranges can overlap > - Changed HiSilicon LPC driver maintainer (Gabriele Paoloni now) and split > maintaner file modifications in a separate commit > - Removed the commit with the DT nodes support for hip06 and hip07 (to be > pushed separately) > - Added a checking on ioport_map() not to break that function as Arnd points > out in V7 review thread; > - fixed the compile issues on alpha, m68k; > > Changes from V7: > - Based on Arnd's comment, rename the LIBIO as LOGIC_PIO; > - Improved the mapping process in LOGIC_PIO to gain better efficiency when > redirecting the I/O accesses to right device driver; > - To reduce the impact on PCI MMIO to a minimum, add a new > CONFIG_INDIRECT_PIO for indirect-IO hosts/devices; > - Added a new ACPI handler for indirect-IO hosts/devices; > - Fixed the compile issues on V6; > > Changes from V6: > - According to the comments from Bjorn and Alex, merge PCI IO and indirect-IO > into a generic I/O space management, LIBIO; > - Adopted the '_DEP' to replace the platform bus notifier. In this way, we can > ensure the LPC peripherals' I/O resources had been translated to logical IO > before the LPC peripheral enumeration; > - Replaced the rwlock with rcu list based on Alex's suggestion; > - Applied relaxed write/read to LPC driver; > - Some bugs fixing and some optimazations based on the comments of V6; > > Changes from V5: > - Made the extio driver more generic and locate in lib/; > - Supported multiple indirect-IO bus instances; > - Extended the pci_register_io_range() to support indirect-IO, then dropped > the I/O reservation used in previous patchset; > - Reimplemented the ACPI LPC support; > - Fixed some bugs, including the compile error on other archs, the module > building failure found by Ming Lei, etc; > > Changes from V4: > - Some revises based on the comments from Bjorn, Rob on V4; > - Fixed the compile error on some platforms, such as openrisc; > > Changes from V3: > - UART support deferred to a separate patchset; This patchset only support > ipmi device under LPC; > - LPC bus I/O range is fixed to 0 ~ (PCIBIOS_MIN_IO - 1), which is separeted > from PCI/PCIE PIO space; > - Based on Arnd's remarks, removed the ranges property from Hip06 lpc dts and > added a new fixup function, of_isa_indirect_io(), to get the I/O address > directly from LPC dts configurations; > - Support in(w,l)/out(w,l) for Hip06 lpc I/O; > - Decouple the header file dependency on the gerenic io.h by defining in/out > as normal functions in c file; > - removed unused macro definitions in the LPC driver; > > Changes from V2: > - Support the PIO retrieval from the linux PIO generated by > pci_address_to_pio. This method replace the 4K PIO reservation in V2; > - Support the flat-tree earlycon; > - Some revises based on Arnd's remarks; > - Make sure the linux PIO range allocated to Hip06 LPC peripherals starts > from non-ZERO; > > Changes from V1: > - Support the ACPI LPC device; > - Optimize the dts LPC driver in ISA compatible mode; > - Reserve the IO range below 4K in avoid the possible conflict with PCI host > IO ranges; > - Support the LPC uart and relevant earlycon; > > V13 thread here: https://lkml.org/lkml/2018/2/13/744 > V12 thread here: https://lkml.org/lkml/2018/1/23/508 > V11 thread here: https://lkml.org/lkml/2018/1/21/38 > V10 thread here: https://lkml.org/lkml/2017/10/27/465 > V9 thread here: https://lkml.org/lkml/2017/5/25/263 > V8 thread here: https://lkml.org/lkml/2017/3/30/619 > V7 thread here: https://lkml.org/lkml/2017/3/12/279 > v6 thread here: https://lkml.org/lkml/2017/1/24/25 > v5 thread here: https://lkml.org/lkml/2016/11/7/955 > v4 thread here: https://lkml.org/lkml/2016/10/20/149 > v3 thread here: https://lkml.org/lkml/2016/9/14/326 > v2 thread here: https://lkml.org/lkml/2016/9/7/356 > v1 thread here: https://lkml.org/lkml/2015/12/29/154 > > Gabriele Paoloni (2): > PCI: Remove unused __weak attribute in pci_register_io_range() > PCI: Add fwnode handler as input param of pci_register_io_range() > > John Garry (3): > ACPI / scan: do not enumerate Indirect IO host children > HISI LPC: Add ACPI support > MAINTAINERS: Add maintainer for HiSilicon LPC driver > > Zhichang Yuan (4): > LIB: Introduce a generic PIO mapping method > PCI: Apply the new generic I/O management on PCI IO hosts > OF: Add missing I/O range exception for indirect-IO devices > HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings > > .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ > MAINTAINERS | 7 + > drivers/acpi/pci_root.c | 8 +- > drivers/acpi/scan.c | 14 + > drivers/bus/Kconfig | 8 + > drivers/bus/Makefile | 1 + > drivers/bus/hisi_lpc.c | 646 +++++++++++++++++++++ > drivers/of/address.c | 96 ++- > drivers/pci/pci.c | 95 +-- > include/asm-generic/io.h | 4 +- > include/linux/logic_pio.h | 131 +++++ > include/linux/pci.h | 3 +- > lib/Kconfig | 15 + > lib/Makefile | 2 + > lib/logic_pio.c | 285 +++++++++ > 15 files changed, 1250 insertions(+), 98 deletions(-) > create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt > create mode 100644 drivers/bus/hisi_lpc.c > create mode 100644 include/linux/logic_pio.h > create mode 100644 lib/logic_pio.c Tested this version on a D05 board, no problems. So, for the series: Tested-by: dann frazier <dann.frazier@canonical.com>
On 21/02/2018 23:15, dann frazier wrote: > On Tue, Feb 20, 2018 at 01:48:31AM +0800, John Garry wrote: >> This patchset supports the IPMI-bt device attached to the Low-Pin-Count >> interface implemented on Hisilicon Hip06/Hip07 SoC. >> ----------- >> | LPC host| >> | | >> ----------- >> | >> _____________V_______________LPC >> | | >> V V >> ------------ >> | BT(ipmi)| >> ------------ >> [...] >> .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ >> MAINTAINERS | 7 + >> drivers/acpi/pci_root.c | 8 +- >> drivers/acpi/scan.c | 14 + >> drivers/bus/Kconfig | 8 + >> drivers/bus/Makefile | 1 + >> drivers/bus/hisi_lpc.c | 646 +++++++++++++++++++++ >> drivers/of/address.c | 96 ++- >> drivers/pci/pci.c | 95 +-- >> include/asm-generic/io.h | 4 +- >> include/linux/logic_pio.h | 131 +++++ >> include/linux/pci.h | 3 +- >> lib/Kconfig | 15 + >> lib/Makefile | 2 + >> lib/logic_pio.c | 285 +++++++++ >> 15 files changed, 1250 insertions(+), 98 deletions(-) >> create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt >> create mode 100644 drivers/bus/hisi_lpc.c >> create mode 100644 include/linux/logic_pio.h >> create mode 100644 lib/logic_pio.c > > Tested this version on a D05 board, no problems. So, for the series: > > Tested-by: dann frazier <dann.frazier@canonical.com> > > . Thanks Dann. I think I still need 1/2 more series review/test/sob tags to get me across the line. John >
This patchset supports the IPMI-bt device attached to the Low-Pin-Count interface implemented on Hisilicon Hip06/Hip07 SoC. ----------- | LPC host| | | ----------- | _____________V_______________LPC | | V V ------------ | BT(ipmi)| ------------ When master accesses those peripherals beneath the Hip06/Hip07 LPC, a specific LPC driver is needed to make LPC host generate the standard LPC I/O cycles with the target peripherals'I/O port addresses. But on curent arm64 world, there is no real I/O accesses. All the I/O operations through in/out accessors are based on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed through driver specific accessors rather than MMIO. To solve this issue and keep the relevant existing peripherals' drivers untouched, this patchset: - introduces a generic I/O space management framework, logical PIO, to support I/O operations on host controllers operating either on MMIO buses or on buses requiring specific driver I/O accessors; - redefines the in/out accessors to provide a unified interface for both MMIO and driver specific I/O operations. Using logical PIO, th call of in/out() from the host children drivers, such as ipmi-si, will be redirected to the corresponding device-specific I/O hooks to perform the I/O accesses. Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC peripherals can be supported without any changes on the existing ipmi-si driver. The whole patchset has been tested on Hip07 D05 board both using DTB and ACPI. Differences to v13: - dropped ACPI scan handler and added patch to not enumerate children of indirect IO hosts in ACPI code - tidied up logic_pio.c a bit for kerneldoc and made some APIs clearer to understand - tided (and simplified) hisi_lpc.c and added new ACPI probe code (same as previous ACPI scan handler code, so comments from Rafael and Andy included) - reinstated PCI range upper limit check in pci_pio_to_address() - dropped Dann Frazier's "tested-by" tag in light of changes - rebase to linuxnext 20180219 (had to fix locally arm64 build issue) Differences to v12: - Addressed ACPI comments from Rafael and Andy, including: - added SPDX license identifiers (other new files in the series got this also) - fixed style issues, like superflous newlines and symbol naming - add fuller acpi_indirectio.c patch commit message - dropped acpi_indirectio_host_data (author's decision) to simplify - added Rob Herring's tag - rebase to linux-next 20180212 Differences to v11: - fixed build errors for i386, m68k, and tile - added a comment in LPC driver commit log why we set the kernel config as bool - some tidying logic_pio code Differences to v10: - dropped CONFIG_LOGIC_PIO. Reason is that CONFIG_PCI depends on this, and CONFIG_PCI is a per-arch CONFIG. So we would require all arch's kconfig to select this. - Addressed Dann Frazier's comments on LPC driver, and sopme other cleanup - Moved logic_pio.h to be included in generic asm io.h - Fixed ACPI indirect IO host setup to handle >1 child - Relocated ACPI indirect IO host setup code to drivers/acpi - Rebased to linux next-20180118 Changes from v9: - patch 2 has been split into 3 patches according to Bjorn comments on v9 thread - patch 1 has been reworked accordign to Bjorn comments on v9 - now logic_pio_trans_hwaddr() has a sanity check to make sure the resource size fits into the assigned range - in patch 5 the MFD framework has been used to probe the LPC children according to the suggestion from Mika Westerberg - Maintaner has changed to Huawei Linuxarm mailing list Changes from v8: - Simplified LIB IO framewrok - Moved INDIRECT PIO ACPI framework under acpi/arm64 - Renamed occurrences of "lib io" and "indirect io" to "lib pio" and "indirect pio" to keep the patchset nomenclature consistent - Removed Alignment reuqirements - Moved LPC specific code out of ACPI common framework - Now PIO indirect HW ranges can overlap - Changed HiSilicon LPC driver maintainer (Gabriele Paoloni now) and split maintaner file modifications in a separate commit - Removed the commit with the DT nodes support for hip06 and hip07 (to be pushed separately) - Added a checking on ioport_map() not to break that function as Arnd points out in V7 review thread; - fixed the compile issues on alpha, m68k; Changes from V7: - Based on Arnd's comment, rename the LIBIO as LOGIC_PIO; - Improved the mapping process in LOGIC_PIO to gain better efficiency when redirecting the I/O accesses to right device driver; - To reduce the impact on PCI MMIO to a minimum, add a new CONFIG_INDIRECT_PIO for indirect-IO hosts/devices; - Added a new ACPI handler for indirect-IO hosts/devices; - Fixed the compile issues on V6; Changes from V6: - According to the comments from Bjorn and Alex, merge PCI IO and indirect-IO into a generic I/O space management, LIBIO; - Adopted the '_DEP' to replace the platform bus notifier. In this way, we can ensure the LPC peripherals' I/O resources had been translated to logical IO before the LPC peripheral enumeration; - Replaced the rwlock with rcu list based on Alex's suggestion; - Applied relaxed write/read to LPC driver; - Some bugs fixing and some optimazations based on the comments of V6; Changes from V5: - Made the extio driver more generic and locate in lib/; - Supported multiple indirect-IO bus instances; - Extended the pci_register_io_range() to support indirect-IO, then dropped the I/O reservation used in previous patchset; - Reimplemented the ACPI LPC support; - Fixed some bugs, including the compile error on other archs, the module building failure found by Ming Lei, etc; Changes from V4: - Some revises based on the comments from Bjorn, Rob on V4; - Fixed the compile error on some platforms, such as openrisc; Changes from V3: - UART support deferred to a separate patchset; This patchset only support ipmi device under LPC; - LPC bus I/O range is fixed to 0 ~ (PCIBIOS_MIN_IO - 1), which is separeted from PCI/PCIE PIO space; - Based on Arnd's remarks, removed the ranges property from Hip06 lpc dts and added a new fixup function, of_isa_indirect_io(), to get the I/O address directly from LPC dts configurations; - Support in(w,l)/out(w,l) for Hip06 lpc I/O; - Decouple the header file dependency on the gerenic io.h by defining in/out as normal functions in c file; - removed unused macro definitions in the LPC driver; Changes from V2: - Support the PIO retrieval from the linux PIO generated by pci_address_to_pio. This method replace the 4K PIO reservation in V2; - Support the flat-tree earlycon; - Some revises based on Arnd's remarks; - Make sure the linux PIO range allocated to Hip06 LPC peripherals starts from non-ZERO; Changes from V1: - Support the ACPI LPC device; - Optimize the dts LPC driver in ISA compatible mode; - Reserve the IO range below 4K in avoid the possible conflict with PCI host IO ranges; - Support the LPC uart and relevant earlycon; V13 thread here: https://lkml.org/lkml/2018/2/13/744 V12 thread here: https://lkml.org/lkml/2018/1/23/508 V11 thread here: https://lkml.org/lkml/2018/1/21/38 V10 thread here: https://lkml.org/lkml/2017/10/27/465 V9 thread here: https://lkml.org/lkml/2017/5/25/263 V8 thread here: https://lkml.org/lkml/2017/3/30/619 V7 thread here: https://lkml.org/lkml/2017/3/12/279 v6 thread here: https://lkml.org/lkml/2017/1/24/25 v5 thread here: https://lkml.org/lkml/2016/11/7/955 v4 thread here: https://lkml.org/lkml/2016/10/20/149 v3 thread here: https://lkml.org/lkml/2016/9/14/326 v2 thread here: https://lkml.org/lkml/2016/9/7/356 v1 thread here: https://lkml.org/lkml/2015/12/29/154 Gabriele Paoloni (2): PCI: Remove unused __weak attribute in pci_register_io_range() PCI: Add fwnode handler as input param of pci_register_io_range() John Garry (3): ACPI / scan: do not enumerate Indirect IO host children HISI LPC: Add ACPI support MAINTAINERS: Add maintainer for HiSilicon LPC driver Zhichang Yuan (4): LIB: Introduce a generic PIO mapping method PCI: Apply the new generic I/O management on PCI IO hosts OF: Add missing I/O range exception for indirect-IO devices HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ MAINTAINERS | 7 + drivers/acpi/pci_root.c | 8 +- drivers/acpi/scan.c | 14 + drivers/bus/Kconfig | 8 + drivers/bus/Makefile | 1 + drivers/bus/hisi_lpc.c | 646 +++++++++++++++++++++ drivers/of/address.c | 96 ++- drivers/pci/pci.c | 95 +-- include/asm-generic/io.h | 4 +- include/linux/logic_pio.h | 131 +++++ include/linux/pci.h | 3 +- lib/Kconfig | 15 + lib/Makefile | 2 + lib/logic_pio.c | 285 +++++++++ 15 files changed, 1250 insertions(+), 98 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt create mode 100644 drivers/bus/hisi_lpc.c create mode 100644 include/linux/logic_pio.h create mode 100644 lib/logic_pio.c