tests/fdc-test.c

   1 /*
   2  * Floppy test cases.
   3  *
   4  * Copyright (c) 2012 Kevin Wolf <kwolf@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include <stdint.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #include <glib.h>
  30
  31 #include "libqtest.h"
  32 #include "qemu-common.h"
  33
  34 #define TEST_IMAGE_SIZE 1440 * 1024
  35
  36 #define FLOPPY_BASE 0x3f0
  37 #define FLOPPY_IRQ 6
  38
  39 enum {
  40     reg_sra         = 0x0,
  41     reg_srb         = 0x1,
  42     reg_dor         = 0x2,
  43     reg_msr         = 0x4,
  44     reg_dsr         = 0x4,
  45     reg_fifo        = 0x5,
  46     reg_dir         = 0x7,
  47 };
  48
  49 enum {
  50     CMD_SENSE_INT   = 0x08,
  51     CMD_SEEK        = 0x0f,
  52 };
  53
  54 enum {
  55     RQM     = 0x80,
  56     DIO     = 0x40,
  57
  58     DSKCHG  = 0x80,
  59 };
  60
  61 char test_image[] = "/tmp/qtest.XXXXXX";
  62
  63 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
  64 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
  65
  66 static void floppy_send(uint8_t byte)
  67 {
  68     uint8_t msr;
  69
  70     msr = inb(FLOPPY_BASE + reg_msr);
  71     assert_bit_set(msr, RQM);
  72     assert_bit_clear(msr, DIO);
  73
  74     outb(FLOPPY_BASE + reg_fifo, byte);
  75 }
  76
  77 static uint8_t floppy_recv(void)
  78 {
  79     uint8_t msr;
  80
  81     msr = inb(FLOPPY_BASE + reg_msr);
  82     assert_bit_set(msr, RQM | DIO);
  83
  84     return inb(FLOPPY_BASE + reg_fifo);
  85 }
  86
  87 static void ack_irq(void)
  88 {
  89     g_assert(get_irq(FLOPPY_IRQ));
  90     floppy_send(CMD_SENSE_INT);
  91     floppy_recv();
  92     floppy_recv();
  93     g_assert(!get_irq(FLOPPY_IRQ));
  94 }
  95
  96 static void send_step_pulse(void)
  97 {
  98     int drive = 0;
  99     int head = 0;
 100     static int cyl = 0;
 101
 102     floppy_send(CMD_SEEK);
 103     floppy_send(head << 2 | drive);
 104     g_assert(!get_irq(FLOPPY_IRQ));
 105     floppy_send(cyl);
 106     ack_irq();
 107
 108     cyl = (cyl + 1) % 4;
 109 }
 110
 111 static void test_media_change(void)
 112 {
 113     uint8_t dir;
 114
 115     /* Media changed bit must be up-to-date after step pulse. Do two SEEKs
 116      * because we may already happen to be on the right cylinder initially. */
 117     send_step_pulse();
 118     send_step_pulse();
 119     dir = inb(FLOPPY_BASE + reg_dir);
 120     assert_bit_clear(dir, DSKCHG);
 121
 122     /* Eject the floppy and check that DSKCHG is set. Reading it out doesn't
 123      * reset the bit. */
 124     qmp("{'execute':'eject', 'arguments':{ 'device':'floppy0' }}");
 125     qmp(""); /* ignore event */
 126
 127     dir = inb(FLOPPY_BASE + reg_dir);
 128     assert_bit_set(dir, DSKCHG);
 129     dir = inb(FLOPPY_BASE + reg_dir);
 130     assert_bit_set(dir, DSKCHG);
 131
 132     send_step_pulse();
 133     dir = inb(FLOPPY_BASE + reg_dir);
 134     assert_bit_set(dir, DSKCHG);
 135     dir = inb(FLOPPY_BASE + reg_dir);
 136     assert_bit_set(dir, DSKCHG);
 137
 138     /* And then insert it again. DSKCHK should not be reset until a step pulse
 139      * is sent. */
 140     qmp("{'execute':'change', 'arguments':{ 'device':'floppy0', "
 141         "'target': '%s' }}", test_image);
 142     qmp(""); /* ignore event (FIXME open -> open transition?!) */
 143     qmp(""); /* ignore event */
 144
 145     dir = inb(FLOPPY_BASE + reg_dir);
 146     assert_bit_set(dir, DSKCHG);
 147     dir = inb(FLOPPY_BASE + reg_dir);
 148     assert_bit_set(dir, DSKCHG);
 149
 150     send_step_pulse();
 151     dir = inb(FLOPPY_BASE + reg_dir);
 152     assert_bit_clear(dir, DSKCHG);
 153     dir = inb(FLOPPY_BASE + reg_dir);
 154     assert_bit_clear(dir, DSKCHG);
 155 }
 156
 157 int main(int argc, char **argv)
 158 {
 159     const char *arch = qtest_get_arch();
 160     char *cmdline;
 161     int fd;
 162     int ret;
 163
 164     /* Check architecture */
 165     if (strcmp(arch, "i386") && strcmp(arch, "x86_64")) {
 166         g_test_message("Skipping test for non-x86\n");
 167         return 0;
 168     }
 169
 170     /* Create a temporary raw image */
 171     fd = mkstemp(test_image);
 172     g_assert(fd >= 0);
 173     ret = ftruncate(fd, TEST_IMAGE_SIZE);
 174     g_assert(ret == 0);
 175     close(fd);
 176
 177     /* Run the tests */
 178     g_test_init(&argc, &argv, NULL);
 179
 180     cmdline = g_strdup_printf("-vnc none "
 181         "-drive file=%s,if=floppy,cache=writeback ",
 182         test_image);
 183
 184     qtest_start(cmdline);
 185     qtest_irq_intercept_in(global_qtest, "ioapic");
 186     qtest_add_func("/fdc/media_change", test_media_change);
 187
 188     ret = g_test_run();
 189
 190     /* Cleanup */
 191     qtest_quit(global_qtest);
 192     unlink(test_image);
 193
 194     return ret;
 195 }