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    Subject[PATCH v4 19/23] tools: PCI: Add a userspace tool to test PCI endpoint
    Date
    Add a userspace tool to invoke the ioctls exposed by the
    PCI endpoint test driver to perform various PCI tests.

    Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
    ---
    tools/pci/pcitest.c | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 186 insertions(+)
    create mode 100644 tools/pci/pcitest.c

    diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
    new file mode 100644
    index 000000000000..39b5b0ba569e
    --- /dev/null
    +++ b/tools/pci/pcitest.c
    @@ -0,0 +1,186 @@
    +/**
    + * Userspace PCI Endpoint Test Module
    + *
    + * Copyright (C) 2017 Texas Instruments
    + * Author: Kishon Vijay Abraham I <kishon@ti.com>
    + *
    + * This program is free software: you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 of
    + * the License as published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#include <errno.h>
    +#include <fcntl.h>
    +#include <stdbool.h>
    +#include <stdio.h>
    +#include <stdlib.h>
    +#include <sys/ioctl.h>
    +#include <time.h>
    +#include <unistd.h>
    +
    +#include <linux/pcitest.h>
    +
    +#define BILLION 1E9
    +
    +static char *result[] = { "NOT OKAY", "OKAY" };
    +
    +struct pci_test {
    + char *device;
    + char barnum;
    + bool legacyirq;
    + unsigned int msinum;
    + bool read;
    + bool write;
    + bool copy;
    + unsigned long size;
    +};
    +
    +static int run_test(struct pci_test *test)
    +{
    + long ret;
    + int fd;
    + struct timespec start, end;
    + double time;
    +
    + fd = open(test->device, O_RDWR);
    + if (fd < 0) {
    + perror("can't open PCI Endpoint Test device");
    + return fd;
    + }
    +
    + if (test->barnum >= 0 && test->barnum <= 5) {
    + ret = ioctl(fd, PCITEST_BAR, test->barnum);
    + fprintf(stdout, "BAR%d:\t\t", test->barnum);
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    + if (test->legacyirq) {
    + ret = ioctl(fd, PCITEST_LEGACY_IRQ, 0);
    + fprintf(stdout, "LEGACY IRQ:\t");
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    + if (test->msinum > 0 && test->msinum <= 32) {
    + ret = ioctl(fd, PCITEST_MSI, test->msinum);
    + fprintf(stdout, "MSI%d:\t\t", test->msinum);
    + 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);
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    + if (test->read) {
    + ret = ioctl(fd, PCITEST_READ, test->size);
    + fprintf(stdout, "READ (%7ld bytes):\t\t", test->size);
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    + if (test->copy) {
    + ret = ioctl(fd, PCITEST_COPY, test->size);
    + fprintf(stdout, "COPY (%7ld bytes):\t\t", test->size);
    + if (ret < 0)
    + fprintf(stdout, "TEST FAILED\n");
    + else
    + fprintf(stdout, "%s\n", result[ret]);
    + }
    +
    + fflush(stdout);
    +}
    +
    +int main(int argc, char **argv)
    +{
    + int c;
    + struct pci_test *test;
    +
    + test = calloc(1, sizeof(*test));
    + if (!test) {
    + perror("Fail to allocate memory for pci_test\n");
    + return -ENOMEM;
    + }
    +
    + /* since '0' is a valid BAR number, initialize it to -1 */
    + test->barnum = -1;
    +
    + /* set default size as 100KB */
    + test->size = 0x19000;
    +
    + /* set default endpoint device */
    + test->device = "/dev/pci-endpoint-test.0";
    +
    + while ((c = getopt(argc, argv, "D:b:m:lrwcs:")) != EOF)
    + switch (c) {
    + case 'D':
    + test->device = optarg;
    + continue;
    + case 'b':
    + test->barnum = atoi(optarg);
    + if (test->barnum < 0 || test->barnum > 5)
    + goto usage;
    + continue;
    + case 'l':
    + test->legacyirq = true;
    + continue;
    + case 'm':
    + test->msinum = atoi(optarg);
    + if (test->msinum < 1 || test->msinum > 32)
    + goto usage;
    + continue;
    + case 'r':
    + test->read = true;
    + continue;
    + case 'w':
    + test->write = true;
    + continue;
    + case 'c':
    + test->copy = true;
    + continue;
    + case 's':
    + test->size = strtoul(optarg, NULL, 0);
    + continue;
    + case '?':
    + case 'h':
    + default:
    +usage:
    + fprintf(stderr,
    + "usage: %s [options]\n"
    + "Options:\n"
    + "\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-r Read buffer test\n"
    + "\t-w Write buffer test\n"
    + "\t-c Copy buffer test\n"
    + "\t-s <size> Size of buffer {default: 100KB}\n",
    + argv[0]);
    + return -EINVAL;
    + }
    +
    + run_test(test);
    + return 0;
    +}
    --
    2.11.0
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