1/**
  2 * Userspace PCI Endpoint Test Module
  3 *
  4 * Copyright (C) 2017 Texas Instruments
  5 * Author: Kishon Vijay Abraham I <kishon@ti.com>
  6 *
  7 * This program is free software: you can redistribute it and/or modify
  8 * it under the terms of the GNU General Public License version 2 of
  9 * the License as published by the Free Software Foundation.
 10 *
 11 * This program is distributed in the hope that it will be useful,
 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14 * GNU General Public License for more details.
 15 *
 16 * You should have received a copy of the GNU General Public License
 17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 18 */
 19
 20#include <errno.h>
 21#include <fcntl.h>
 22#include <stdbool.h>
 23#include <stdio.h>
 24#include <stdlib.h>
 25#include <sys/ioctl.h>
 26#include <time.h>
 27#include <unistd.h>
 28
 29#include <linux/pcitest.h>
 30
 31#define BILLION 1E9
 32
 33static char *result[] = { "NOT OKAY", "OKAY" };
 34
 35struct pci_test {
 36	char		*device;
 37	char		barnum;
 38	bool		legacyirq;
 39	unsigned int	msinum;
 40	bool		read;
 41	bool		write;
 42	bool		copy;
 43	unsigned long	size;
 44};
 45
 46static int run_test(struct pci_test *test)
 47{
 48	long ret;
 49	int fd;
 50	struct timespec start, end;
 51	double time;
 52
 53	fd = open(test->device, O_RDWR);
 54	if (fd < 0) {
 55		perror("can't open PCI Endpoint Test device");
 56		return fd;
 57	}
 58
 59	if (test->barnum >= 0 && test->barnum <= 5) {
 60		ret = ioctl(fd, PCITEST_BAR, test->barnum);
 61		fprintf(stdout, "BAR%d:\t\t", test->barnum);
 62		if (ret < 0)
 63			fprintf(stdout, "TEST FAILED\n");
 64		else
 65			fprintf(stdout, "%s\n", result[ret]);
 66	}
 67
 68	if (test->legacyirq) {
 69		ret = ioctl(fd, PCITEST_LEGACY_IRQ, 0);
 70		fprintf(stdout, "LEGACY IRQ:\t");
 71		if (ret < 0)
 72			fprintf(stdout, "TEST FAILED\n");
 73		else
 74			fprintf(stdout, "%s\n", result[ret]);
 75	}
 76
 77	if (test->msinum > 0 && test->msinum <= 32) {
 78		ret = ioctl(fd, PCITEST_MSI, test->msinum);
 79		fprintf(stdout, "MSI%d:\t\t", test->msinum);
 80		if (ret < 0)
 81			fprintf(stdout, "TEST FAILED\n");
 82		else
 83			fprintf(stdout, "%s\n", result[ret]);
 84	}
 85
 86	if (test->write) {
 87		ret = ioctl(fd, PCITEST_WRITE, test->size);
 88		fprintf(stdout, "WRITE (%7ld bytes):\t\t", test->size);
 89		if (ret < 0)
 90			fprintf(stdout, "TEST FAILED\n");
 91		else
 92			fprintf(stdout, "%s\n", result[ret]);
 93	}
 94
 95	if (test->read) {
 96		ret = ioctl(fd, PCITEST_READ, test->size);
 97		fprintf(stdout, "READ (%7ld bytes):\t\t", test->size);
 98		if (ret < 0)
 99			fprintf(stdout, "TEST FAILED\n");
100		else
101			fprintf(stdout, "%s\n", result[ret]);
102	}
103
104	if (test->copy) {
105		ret = ioctl(fd, PCITEST_COPY, test->size);
106		fprintf(stdout, "COPY (%7ld bytes):\t\t", test->size);
107		if (ret < 0)
108			fprintf(stdout, "TEST FAILED\n");
109		else
110			fprintf(stdout, "%s\n", result[ret]);
111	}
112
113	fflush(stdout);
114}
115
116int main(int argc, char **argv)
117{
118	int c;
119	struct pci_test *test;
120
121	test = calloc(1, sizeof(*test));
122	if (!test) {
123		perror("Fail to allocate memory for pci_test\n");
124		return -ENOMEM;
125	}
126
127	/* since '0' is a valid BAR number, initialize it to -1 */
128	test->barnum = -1;
129
130	/* set default size as 100KB */
131	test->size = 0x19000;
132
133	/* set default endpoint device */
134	test->device = "/dev/pci-endpoint-test.0";
135
136	while ((c = getopt(argc, argv, "D:b:m:lrwcs:")) != EOF)
137	switch (c) {
138	case 'D':
139		test->device = optarg;
140		continue;
141	case 'b':
142		test->barnum = atoi(optarg);
143		if (test->barnum < 0 || test->barnum > 5)
144			goto usage;
145		continue;
146	case 'l':
147		test->legacyirq = true;
148		continue;
149	case 'm':
150		test->msinum = atoi(optarg);
151		if (test->msinum < 1 || test->msinum > 32)
152			goto usage;
153		continue;
154	case 'r':
155		test->read = true;
156		continue;
157	case 'w':
158		test->write = true;
159		continue;
160	case 'c':
161		test->copy = true;
162		continue;
163	case 's':
164		test->size = strtoul(optarg, NULL, 0);
165		continue;
166	case '?':
167	case 'h':
168	default:
169usage:
170		fprintf(stderr,
171			"usage: %s [options]\n"
172			"Options:\n"
173			"\t-D <dev>		PCI endpoint test device {default: /dev/pci-endpoint-test.0}\n"
174			"\t-b <bar num>		BAR test (bar number between 0..5)\n"
175			"\t-m <msi num>		MSI test (msi number between 1..32)\n"
176			"\t-l			Legacy IRQ test\n"
177			"\t-r			Read buffer test\n"
178			"\t-w			Write buffer test\n"
179			"\t-c			Copy buffer test\n"
180			"\t-s <size>		Size of buffer {default: 100KB}\n",
181			argv[0]);
182		return -EINVAL;
183	}
184
185	run_test(test);
186	return 0;
187}