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    Subject[RFC 10/10] tools: PCI: Add MSI-X support
    Date
    Adds MSI-X support to the pcitest tool and modified the pcitest.sh script
    to accomodate this new type of interruption test.

    Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
    ---
    include/uapi/linux/pcitest.h | 1 +
    tools/pci/pcitest.c | 18 +++++++++++++++++-
    tools/pci/pcitest.sh | 25 +++++++++++++++++++++++++
    3 files changed, 43 insertions(+), 1 deletion(-)

    diff --git a/include/uapi/linux/pcitest.h b/include/uapi/linux/pcitest.h
    index 953cf03..d746fb1 100644
    --- a/include/uapi/linux/pcitest.h
    +++ b/include/uapi/linux/pcitest.h
    @@ -16,5 +16,6 @@
    #define PCITEST_WRITE _IOW('P', 0x4, unsigned long)
    #define PCITEST_READ _IOW('P', 0x5, unsigned long)
    #define PCITEST_COPY _IOW('P', 0x6, unsigned long)
    +#define PCITEST_MSIX _IOW('P', 0x7, int)

    #endif /* __UAPI_LINUX_PCITEST_H */
    diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
    index 9074b47..9d145a3 100644
    --- a/tools/pci/pcitest.c
    +++ b/tools/pci/pcitest.c
    @@ -37,6 +37,7 @@ struct pci_test {
    char barnum;
    bool legacyirq;
    unsigned int msinum;
    + unsigned int msixnum;
    bool read;
    bool write;
    bool copy;
    @@ -83,6 +84,15 @@ static int run_test(struct pci_test *test)
    fprintf(stdout, "%s\n", result[ret]);
    }

    + if (test->msixnum > 0 && test->msixnum <= 2048) {
    + ret = ioctl(fd, PCITEST_MSIX, test->msixnum);
    + fprintf(stdout, "MSI-X%d:\t\t", test->msixnum);
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    if (test->write) {
    ret = ioctl(fd, PCITEST_WRITE, test->size);
    fprintf(stdout, "WRITE (%7ld bytes):\t\t", test->size);
    @@ -133,7 +143,7 @@ int main(int argc, char **argv)
    /* set default endpoint device */
    test->device = "/dev/pci-endpoint-test.0";

    - while ((c = getopt(argc, argv, "D:b:m:lrwcs:")) != EOF)
    + while ((c = getopt(argc, argv, "D:b:m:x:lrwcs:")) != EOF)
    switch (c) {
    case 'D':
    test->device = optarg;
    @@ -151,6 +161,11 @@ int main(int argc, char **argv)
    if (test->msinum < 1 || test->msinum > 32)
    goto usage;
    continue;
    + case 'x':
    + test->msixnum = atoi(optarg);
    + if (test->msixnum < 1 || test->msixnum > 2048)
    + goto usage;
    + continue;
    case 'r':
    test->read = true;
    continue;
    @@ -173,6 +188,7 @@ int main(int argc, char **argv)
    "\t-D <dev> PCI endpoint test device {default: /dev/pci-endpoint-test.0}\n"
    "\t-b <bar num> BAR test (bar number between 0..5)\n"
    "\t-m <msi num> MSI test (msi number between 1..32)\n"
    + "\t-x <msix num> MSI-X test (msix number between 1..2048)\n"
    "\t-l Legacy IRQ test\n"
    "\t-r Read buffer test\n"
    "\t-w Write buffer test\n"
    diff --git a/tools/pci/pcitest.sh b/tools/pci/pcitest.sh
    index 77e8c85..86709a2 100644
    --- a/tools/pci/pcitest.sh
    +++ b/tools/pci/pcitest.sh
    @@ -4,6 +4,8 @@
    echo "BAR tests"
    echo

    +modprobe pci_endpoint_test
    +sleep 2
    bar=0

    while [ $bar -lt 6 ]
    @@ -16,7 +18,14 @@ echo
    echo "Interrupt tests"
    echo

    +rmmod pci_endpoint_test
    +sleep 2
    +modprobe pci_endpoint_test irq_type=0
    pcitest -l
    +
    +rmmod pci_endpoint_test
    +sleep 2
    +modprobe pci_endpoint_test irq_type=1
    msi=1

    while [ $msi -lt 33 ]
    @@ -26,9 +35,25 @@ do
    done
    echo

    +rmmod pci_endpoint_test
    +sleep 2
    +modprobe pci_endpoint_test irq_type=2
    +msix=1
    +
    +while [ $msix -lt 2049 ]
    +do
    + pcitest -x $msix
    + msix=`expr $msix + 1`
    +done
    +echo
    +
    echo "Read Tests"
    echo

    +rmmod pci_endpoint_test
    +sleep 2
    +modprobe pci_endpoint_test irq_type=1
    +
    pcitest -r -s 1
    pcitest -r -s 1024
    pcitest -r -s 1025
    --
    2.7.4

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