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Message-ID: <334da3b2-5233-5ad3-728e-7ae95231bf01@huawei.com>
Date: Thu, 22 Mar 2018 10:38:37 +0000
From: John Garry <john.garry@...wei.com>
To: Bjorn Helgaas <helgaas@...nel.org>
CC: "mika.westerberg@...ux.intel.com" <mika.westerberg@...ux.intel.com>,
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Subject: Re: [PATCH v17 00/10] LPC: legacy ISA I/O support
On 21/03/2018 23:39, Bjorn Helgaas wrote:
> On Thu, Mar 15, 2018 at 02:15:49AM +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)|
>> ------------
>> ...
>
>> 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 (4):
>> ACPI / scan: rename acpi_is_serial_bus_slave() to widen use
>> 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 | 33 +-
>> drivers/bus/Kconfig | 8 +
>> drivers/bus/Makefile | 2 +
>> drivers/bus/hisi_lpc.c | 623 +++++++++++++++++++++
>> drivers/of/address.c | 96 +++-
>> drivers/pci/pci.c | 95 +---
>> include/acpi/acpi_bus.h | 2 +-
>> include/asm-generic/io.h | 4 +-
>> include/linux/logic_pio.h | 124 ++++
>> include/linux/pci.h | 3 +-
>> lib/Kconfig | 15 +
>> lib/Makefile | 2 +
>> lib/logic_pio.c | 282 ++++++++++
>> 16 files changed, 1229 insertions(+), 108 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
>
> I applied this whole series to pci/lpc for v4.17.
>
> I made the following whitespace and other trivial corrections.
> Hopefully I didn't break anything.
>
Hi Bjorn,
Super thanks for doing this. In general the changes look ok. However a
build issue has appeared, below.
I retested your pci/lpc branch (with the build fix), and it seems fine.
BTW, I am also testing with a "Serial controller: MosChip Semiconductor
Technology Ltd. PCIe 9912 Multi-I/O Controller" in loopback mode to
ensure PCI host IO space is not broken and this is ok.
Thanks again, and to everyone who has helped with this patchset!
John
>
> --- changelogs.orig 2018-03-21 18:37:47.209217927 -0500
> +++ changelogs 2018-03-21 18:37:35.993074570 -0500
> @@ -1,29 +1,31 @@
> -commit cc88cacce96a
> +commit eb3a2ff7e72e
> Author: John Garry <john.garry@...wei.com>
> Date: Thu Mar 15 02:15:59 2018 +0800
>
[ ... ]
>
> @@ -134,21 +132,20 @@ static struct logic_pio_hwaddr *find_io_range(unsigned long pio)
> * logic_pio_to_hwaddr - translate logical PIO to HW address
> * @pio: logical PIO value
> *
> - * Returns HW address if valid, ~0 otherwise
> + * Returns HW address if valid, ~0 otherwise.
> *
> - * Translate the input logical pio to the corresponding hardware address.
> - * The input pio should be unique in the whole logical PIO space.
> + * Translate the input logical PIO to the corresponding hardware address.
> + * The input PIO should be unique in the whole logical PIO space.
> */
> resource_size_t logic_pio_to_hwaddr(unsigned long pio)
> {
> struct logic_pio_hwaddr *range;
> - resource_size_t hwaddr = (resource_size_t)~0;
>
> range = find_io_range(pio);
> if (range)
> - hwaddr = range->hw_start + pio - range->io_start;
> + return = range->hw_start + pio - range->io_start;
Please remove '='
>
> - return hwaddr;
> + return (resource_size_t)~0;
> }
>
> /**
> @@ -159,15 +156,14 @@ resource_size_t logic_pio_to_hwaddr(unsigned long pio)
> *
> * Returns Logical PIO value if successful, ~0UL otherwise
> */
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