4 * Copyright (c) 2012 Red Hat Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "hw/pci/pci.h"
23 #include "qemu/event_notifier.h"
25 typedef struct PCITestDevHdr {
36 typedef struct IOTest {
38 EventNotifier notifier;
46 #define IOTEST_DATAMATCH 0xFA
47 #define IOTEST_NOMATCH 0xCE
49 #define IOTEST_IOSIZE 128
50 #define IOTEST_MEMSIZE 2048
52 static const char *iotest_test[] = {
58 static const char *iotest_type[] = {
63 #define IOTEST_TEST(i) (iotest_test[((i) % ARRAY_SIZE(iotest_test))])
64 #define IOTEST_TYPE(i) (iotest_type[((i) / ARRAY_SIZE(iotest_test))])
65 #define IOTEST_MAX_TEST (ARRAY_SIZE(iotest_test))
66 #define IOTEST_MAX_TYPE (ARRAY_SIZE(iotest_type))
67 #define IOTEST_MAX (IOTEST_MAX_TEST * IOTEST_MAX_TYPE)
75 #define IOTEST_ACCESS_TYPE uint8_t
76 #define IOTEST_ACCESS_WIDTH (sizeof(uint8_t))
78 typedef struct PCITestDevState {
89 #define TYPE_PCI_TEST_DEV "pci-testdev"
91 #define PCI_TEST_DEV(obj) \
92 OBJECT_CHECK(PCITestDevState, (obj), TYPE_PCI_TEST_DEV)
94 #define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio"))
95 #define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ? &(d)->mmio : &(d)->portio)
96 #define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE)
97 #define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \
98 PCI_BASE_ADDRESS_SPACE_IO)
100 static int pci_testdev_start(IOTest *test)
102 test->hdr->count = 0;
103 if (!test->hasnotifier) {
106 event_notifier_test_and_clear(&test->notifier);
107 memory_region_add_eventfd(test->mr,
108 le32_to_cpu(test->hdr->offset),
116 static void pci_testdev_stop(IOTest *test)
118 if (!test->hasnotifier) {
121 memory_region_del_eventfd(test->mr,
122 le32_to_cpu(test->hdr->offset),
130 pci_testdev_reset(PCITestDevState *d)
132 if (d->current == -1) {
135 pci_testdev_stop(&d->tests[d->current]);
139 static void pci_testdev_inc(IOTest *test, unsigned inc)
141 uint32_t c = le32_to_cpu(test->hdr->count);
142 test->hdr->count = cpu_to_le32(c + inc);
146 pci_testdev_write(void *opaque, hwaddr addr, uint64_t val,
147 unsigned size, int type)
149 PCITestDevState *d = opaque;
153 if (addr == offsetof(PCITestDevHdr, test)) {
154 pci_testdev_reset(d);
155 if (val >= IOTEST_MAX_TEST) {
158 t = type * IOTEST_MAX_TEST + val;
159 r = pci_testdev_start(&d->tests[t]);
166 if (d->current < 0) {
169 test = &d->tests[d->current];
170 if (addr != le32_to_cpu(test->hdr->offset)) {
173 if (test->match_data && test->size != size) {
176 if (test->match_data && val != test->hdr->data) {
179 pci_testdev_inc(test, 1);
183 pci_testdev_read(void *opaque, hwaddr addr, unsigned size)
185 PCITestDevState *d = opaque;
188 if (d->current < 0) {
191 test = &d->tests[d->current];
192 buf = (const char *)test->hdr;
193 if (addr + size >= test->bufsize) {
196 if (test->hasnotifier) {
197 event_notifier_test_and_clear(&test->notifier);
203 pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val,
206 pci_testdev_write(opaque, addr, val, size, 0);
210 pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val,
213 pci_testdev_write(opaque, addr, val, size, 1);
216 static const MemoryRegionOps pci_testdev_mmio_ops = {
217 .read = pci_testdev_read,
218 .write = pci_testdev_mmio_write,
219 .endianness = DEVICE_LITTLE_ENDIAN,
221 .min_access_size = 1,
222 .max_access_size = 1,
226 static const MemoryRegionOps pci_testdev_pio_ops = {
227 .read = pci_testdev_read,
228 .write = pci_testdev_pio_write,
229 .endianness = DEVICE_LITTLE_ENDIAN,
231 .min_access_size = 1,
232 .max_access_size = 1,
236 static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp)
238 PCITestDevState *d = PCI_TEST_DEV(pci_dev);
242 bool fastmmio = kvm_ioeventfd_any_length_enabled();
244 pci_conf = pci_dev->config;
246 pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */
248 memory_region_init_io(&d->mmio, OBJECT(d), &pci_testdev_mmio_ops, d,
249 "pci-testdev-mmio", IOTEST_MEMSIZE * 2);
250 memory_region_init_io(&d->portio, OBJECT(d), &pci_testdev_pio_ops, d,
251 "pci-testdev-portio", IOTEST_IOSIZE * 2);
252 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
253 pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);
256 d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests);
257 for (i = 0; i < IOTEST_MAX; ++i) {
258 IOTest *test = &d->tests[i];
259 name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i));
260 test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1;
261 test->hdr = g_malloc0(test->bufsize);
262 memcpy(test->hdr->name, name, strlen(name) + 1);
264 test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
265 test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
266 if (fastmmio && IOTEST_IS_MEM(i) && !test->match_data) {
269 test->size = IOTEST_ACCESS_WIDTH;
272 test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
273 test->hdr->width = IOTEST_ACCESS_WIDTH;
274 test->mr = IOTEST_REGION(d, i);
275 if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
276 test->hasnotifier = false;
279 r = event_notifier_init(&test->notifier, 0);
281 test->hasnotifier = true;
286 pci_testdev_uninit(PCIDevice *dev)
288 PCITestDevState *d = PCI_TEST_DEV(dev);
291 pci_testdev_reset(d);
292 for (i = 0; i < IOTEST_MAX; ++i) {
293 if (d->tests[i].hasnotifier) {
294 event_notifier_cleanup(&d->tests[i].notifier);
296 g_free(d->tests[i].hdr);
301 static void qdev_pci_testdev_reset(DeviceState *dev)
303 PCITestDevState *d = PCI_TEST_DEV(dev);
304 pci_testdev_reset(d);
307 static void pci_testdev_class_init(ObjectClass *klass, void *data)
309 DeviceClass *dc = DEVICE_CLASS(klass);
310 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
312 k->realize = pci_testdev_realize;
313 k->exit = pci_testdev_uninit;
314 k->vendor_id = PCI_VENDOR_ID_REDHAT;
315 k->device_id = PCI_DEVICE_ID_REDHAT_TEST;
317 k->class_id = PCI_CLASS_OTHERS;
318 dc->desc = "PCI Test Device";
319 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
320 dc->reset = qdev_pci_testdev_reset;
323 static const TypeInfo pci_testdev_info = {
324 .name = TYPE_PCI_TEST_DEV,
325 .parent = TYPE_PCI_DEVICE,
326 .instance_size = sizeof(PCITestDevState),
327 .class_init = pci_testdev_class_init,
330 static void pci_testdev_register_types(void)
332 type_register_static(&pci_testdev_info);
335 type_init(pci_testdev_register_types)