[PATCH v5 20/24] tools: PCI: Add a userspace tool to test PCI endpoint

Kishon Vijay Abraham I
2017-03-27T09:45:16Z

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