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Date: Sun, 17 Jan 2021 08:12:44 -0800
From: Tom Rix <trix@...hat.com>
To: Moritz Fischer <mdf@...nel.org>
Cc: shuah@...nel.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-fpga@...r.kernel.org
Subject: Re: [PATCH v2] selftests: drivers: fpga: A test for interrupt support
On 1/16/21 7:43 PM, Moritz Fischer wrote:
> Hi Tom,
>
> On Sat, Jan 16, 2021 at 11:33:21AM -0800, trix@...hat.com wrote:
>> From: Tom Rix <trix@...hat.com>
>>
>> Check that the ioctl DFL_FPGA_PORT_ERR_GET_IRQ_NUM returns
>> an expected result.
>>
>> Tested on vf device 0xbcc1
>>
>> Sample run with
>> # make -C tools/testing/selftests TARGETS=drivers/fpga run_tests
>> ...
>> TAP version 13
>> 1..1
>> # selftests: drivers/fpga: intr
>> # TAP version 13
>> # 1..1
>> # # Starting 1 tests from 1 test cases.
>> # # RUN global.afu_intr ...
>> # # OK global.afu_intr
>> # ok 1 global.afu_intr
>> # # PASSED: 1 / 1 tests passed.
>> # # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0
>> ok 1 selftests: drivers/fpga: intr
>>
>> Signed-off-by: Tom Rix <trix@...hat.com>
>> ---
>> v1: Convert to kselftest_harness.h framework
>> ---
>> MAINTAINERS | 1 +
>> tools/testing/selftests/Makefile | 1 +
>> tools/testing/selftests/drivers/fpga/Makefile | 7 ++++
>> tools/testing/selftests/drivers/fpga/config | 1 +
>> tools/testing/selftests/drivers/fpga/intr.c | 36 +++++++++++++++++++
>> 5 files changed, 46 insertions(+)
>> create mode 100644 tools/testing/selftests/drivers/fpga/Makefile
>> create mode 100644 tools/testing/selftests/drivers/fpga/config
>> create mode 100644 tools/testing/selftests/drivers/fpga/intr.c
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index de610a06cb5c..7ed3ce58d95e 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -6973,6 +6973,7 @@ F: Documentation/driver-api/fpga/
>> F: Documentation/fpga/
>> F: drivers/fpga/
>> F: include/linux/fpga/
>> +F: tools/testing/selftests/drivers/fpga/
>>
>> FPGA SECURITY MANAGER DRIVERS
>> M: Russ Weight <russell.h.weight@...el.com>
>> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
>> index afbab4aeef3c..aad4763ec348 100644
>> --- a/tools/testing/selftests/Makefile
>> +++ b/tools/testing/selftests/Makefile
>> @@ -9,6 +9,7 @@ TARGETS += core
>> TARGETS += cpufreq
>> TARGETS += cpu-hotplug
>> TARGETS += drivers/dma-buf
>> +TARGETS += drivers/fpga
>> TARGETS += efivarfs
>> TARGETS += exec
>> TARGETS += filesystems
>> diff --git a/tools/testing/selftests/drivers/fpga/Makefile b/tools/testing/selftests/drivers/fpga/Makefile
>> new file mode 100644
>> index 000000000000..eba35c405d5b
>> --- /dev/null
>> +++ b/tools/testing/selftests/drivers/fpga/Makefile
>> @@ -0,0 +1,7 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +CFLAGS += -I../../../../../usr/include/
>> +CFLAGS += -I../../../../../include/uapi/
>> +
>> +TEST_GEN_PROGS := intr
>> +
>> +include ../../lib.mk
>> diff --git a/tools/testing/selftests/drivers/fpga/config b/tools/testing/selftests/drivers/fpga/config
>> new file mode 100644
>> index 000000000000..e2111b81d8d7
>> --- /dev/null
>> +++ b/tools/testing/selftests/drivers/fpga/config
>> @@ -0,0 +1 @@
>> +CONFIG_FPGA_DFL_AFU=m
>> diff --git a/tools/testing/selftests/drivers/fpga/intr.c b/tools/testing/selftests/drivers/fpga/intr.c
>> new file mode 100644
>> index 000000000000..b362fb1f788d
>> --- /dev/null
>> +++ b/tools/testing/selftests/drivers/fpga/intr.c
>> @@ -0,0 +1,36 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +#include <stdio.h>
>> +#include <stdlib.h>
>> +#include <stdint.h>
>> +#include <string.h>
>> +#include <sys/fcntl.h>
>> +#include <sys/ioctl.h>
>> +#include <linux/fpga-dfl.h>
>> +
>> +#include "../../kselftest_harness.h"
> Is that how it works with selftests?
I believe so, the big change over v1, is me reading the manual
https://www.kernel.org/doc/html/latest/dev-tools/kselftest.html
>> +
>> +TEST(afu_intr)
>> +{
>> + int devfd, status;
>> + struct dfl_fpga_port_info port_info;
>> + uint32_t irq_num = UINT32_MAX;
> Can you order those?
>
> xxxx
> xx
> x
yes, v3 is on its way.
>> +
>> + devfd = open("/dev/dfl-port.0", O_RDONLY);
>> + if (devfd < 0)
>> + SKIP(0, "no fpga afu device 0");
>> + /*
>> + * From fpga-dl.h :
>> + * Currently hardware supports up to 1 irq.
>> + * Return: 0 on success, -errno on failure.
>> + */
>> + status = ioctl(devfd, DFL_FPGA_PORT_ERR_GET_IRQ_NUM, &irq_num);
>> + ASSERT_EQ(0, status) {
>> + TH_LOG("ioctl() failed to get the number irqs");
>> + }
>> + ASSERT_LT(irq_num, 256) {
>> + TH_LOG("unexpeced number of irqs");
>> + }
>> + close(devfd);
>> +}
>> +
>> +TEST_HARNESS_MAIN
>> --
>> 2.27.0
>>
> Thanks for starting this, I don't know a lot about selftests (yet).
> So we probably want to get a look at this from corresponding maintainers.
Me either, that's why I am starting small.
It would be nice to have a set of smoke tests to hook into a c/i.
Tom
> - Moritz
>
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