Messages in this thread Patch in this message | | | From | Qiang Su <> | Subject | [PATCH V2] UIO: make maximum memory and port regions configurable | Date | Sat, 7 Mar 2020 16:10:08 +0800 |
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Now each uio device can only support 5 memory regions and 5 port regions. It is far from enough for some big system. On the other hand, the hard-coded style is not flexible.
Consider the marco is used as array index, so a range for the config is set in menuconfig. The range is set as 1 to 512. The default value is still set as 5 to keep consistent with current code.
Signed-off-by: Qiang Su <suqiang4@huawei.com> Reported-by: kbuild test robot <lkp@intel.com> --- Changes since v1: - also make port regions configurable in menuconfig. - fix kbuild errors. --- drivers/uio/Kconfig | 18 ++++++++++++++++++ include/linux/uio_driver.h | 4 ++-- 2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig index 202ee81cfc2b..cee7d93cfea2 100644 --- a/drivers/uio/Kconfig +++ b/drivers/uio/Kconfig @@ -165,4 +165,22 @@ config UIO_HV_GENERIC to network and storage devices from userspace. If you compile this as a module, it will be called uio_hv_generic. + +config MAX_UIO_MAPS + depends on UIO + int "Maximum of memory nodes each uio device support(1-512)" + range 1 512 + default 5 + help + make the max number of memory regions in uio device configurable. + +config MAX_UIO_PORT_REGIONS + depends on UIO + int "Maximum of port regions each uio device support(1-512)" + range 1 512 + default 5 + help + make the max number of port regions in uio device configurable. + + endif diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index 01081c4726c0..5dc60088834c 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -44,7 +44,7 @@ struct uio_mem { struct uio_map *map; }; -#define MAX_UIO_MAPS 5 +#define MAX_UIO_MAPS CONFIG_MAX_UIO_MAPS struct uio_portio; @@ -64,7 +64,7 @@ struct uio_port { struct uio_portio *portio; }; -#define MAX_UIO_PORT_REGIONS 5 +#define MAX_UIO_PORT_REGIONS CONFIG_MAX_UIO_PORT_REGIONS struct uio_device { struct module *owner; -- 2.12.3
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