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22773d60 MT |
1 | /* |
2 | * QEMU PCI test device | |
3 | * | |
4 | * Copyright (c) 2012 Red Hat Inc. | |
5 | * Author: Michael S. Tsirkin <mst@redhat.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 as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
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. | |
16 | * | |
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/>. | |
19 | */ | |
97d5408f | 20 | #include "qemu/osdep.h" |
22773d60 MT |
21 | #include "hw/hw.h" |
22 | #include "hw/pci/pci.h" | |
23 | #include "qemu/event_notifier.h" | |
77ac58dd | 24 | #include "sysemu/kvm.h" |
22773d60 MT |
25 | |
26 | typedef struct PCITestDevHdr { | |
27 | uint8_t test; | |
28 | uint8_t width; | |
29 | uint8_t pad0[2]; | |
30 | uint32_t offset; | |
31 | uint8_t data; | |
32 | uint8_t pad1[3]; | |
33 | uint32_t count; | |
34 | uint8_t name[]; | |
35 | } PCITestDevHdr; | |
36 | ||
37 | typedef struct IOTest { | |
38 | MemoryRegion *mr; | |
39 | EventNotifier notifier; | |
40 | bool hasnotifier; | |
41 | unsigned size; | |
42 | bool match_data; | |
43 | PCITestDevHdr *hdr; | |
44 | unsigned bufsize; | |
45 | } IOTest; | |
46 | ||
47 | #define IOTEST_DATAMATCH 0xFA | |
48 | #define IOTEST_NOMATCH 0xCE | |
49 | ||
50 | #define IOTEST_IOSIZE 128 | |
51 | #define IOTEST_MEMSIZE 2048 | |
52 | ||
53 | static const char *iotest_test[] = { | |
54 | "no-eventfd", | |
55 | "wildcard-eventfd", | |
56 | "datamatch-eventfd" | |
57 | }; | |
58 | ||
59 | static const char *iotest_type[] = { | |
60 | "mmio", | |
61 | "portio" | |
62 | }; | |
63 | ||
64 | #define IOTEST_TEST(i) (iotest_test[((i) % ARRAY_SIZE(iotest_test))]) | |
65 | #define IOTEST_TYPE(i) (iotest_type[((i) / ARRAY_SIZE(iotest_test))]) | |
66 | #define IOTEST_MAX_TEST (ARRAY_SIZE(iotest_test)) | |
67 | #define IOTEST_MAX_TYPE (ARRAY_SIZE(iotest_type)) | |
68 | #define IOTEST_MAX (IOTEST_MAX_TEST * IOTEST_MAX_TYPE) | |
69 | ||
70 | enum { | |
71 | IOTEST_ACCESS_NAME, | |
72 | IOTEST_ACCESS_DATA, | |
73 | IOTEST_ACCESS_MAX, | |
74 | }; | |
75 | ||
76 | #define IOTEST_ACCESS_TYPE uint8_t | |
77 | #define IOTEST_ACCESS_WIDTH (sizeof(uint8_t)) | |
78 | ||
79 | typedef struct PCITestDevState { | |
6d27a409 AF |
80 | /*< private >*/ |
81 | PCIDevice parent_obj; | |
82 | /*< public >*/ | |
83 | ||
22773d60 MT |
84 | MemoryRegion mmio; |
85 | MemoryRegion portio; | |
86 | IOTest *tests; | |
87 | int current; | |
41746334 GH |
88 | |
89 | uint64_t membar_size; | |
90 | MemoryRegion membar; | |
22773d60 MT |
91 | } PCITestDevState; |
92 | ||
40108d0a PC |
93 | #define TYPE_PCI_TEST_DEV "pci-testdev" |
94 | ||
95 | #define PCI_TEST_DEV(obj) \ | |
96 | OBJECT_CHECK(PCITestDevState, (obj), TYPE_PCI_TEST_DEV) | |
97 | ||
22773d60 MT |
98 | #define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio")) |
99 | #define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ? &(d)->mmio : &(d)->portio) | |
100 | #define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE) | |
101 | #define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \ | |
102 | PCI_BASE_ADDRESS_SPACE_IO) | |
103 | ||
104 | static int pci_testdev_start(IOTest *test) | |
105 | { | |
106 | test->hdr->count = 0; | |
107 | if (!test->hasnotifier) { | |
108 | return 0; | |
109 | } | |
110 | event_notifier_test_and_clear(&test->notifier); | |
111 | memory_region_add_eventfd(test->mr, | |
112 | le32_to_cpu(test->hdr->offset), | |
113 | test->size, | |
114 | test->match_data, | |
115 | test->hdr->data, | |
116 | &test->notifier); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static void pci_testdev_stop(IOTest *test) | |
121 | { | |
122 | if (!test->hasnotifier) { | |
123 | return; | |
124 | } | |
125 | memory_region_del_eventfd(test->mr, | |
126 | le32_to_cpu(test->hdr->offset), | |
127 | test->size, | |
128 | test->match_data, | |
129 | test->hdr->data, | |
130 | &test->notifier); | |
131 | } | |
132 | ||
133 | static void | |
134 | pci_testdev_reset(PCITestDevState *d) | |
135 | { | |
136 | if (d->current == -1) { | |
137 | return; | |
138 | } | |
139 | pci_testdev_stop(&d->tests[d->current]); | |
140 | d->current = -1; | |
141 | } | |
142 | ||
143 | static void pci_testdev_inc(IOTest *test, unsigned inc) | |
144 | { | |
145 | uint32_t c = le32_to_cpu(test->hdr->count); | |
146 | test->hdr->count = cpu_to_le32(c + inc); | |
147 | } | |
148 | ||
149 | static void | |
150 | pci_testdev_write(void *opaque, hwaddr addr, uint64_t val, | |
151 | unsigned size, int type) | |
152 | { | |
153 | PCITestDevState *d = opaque; | |
154 | IOTest *test; | |
155 | int t, r; | |
156 | ||
157 | if (addr == offsetof(PCITestDevHdr, test)) { | |
158 | pci_testdev_reset(d); | |
159 | if (val >= IOTEST_MAX_TEST) { | |
160 | return; | |
161 | } | |
162 | t = type * IOTEST_MAX_TEST + val; | |
163 | r = pci_testdev_start(&d->tests[t]); | |
164 | if (r < 0) { | |
165 | return; | |
166 | } | |
167 | d->current = t; | |
168 | return; | |
169 | } | |
170 | if (d->current < 0) { | |
171 | return; | |
172 | } | |
173 | test = &d->tests[d->current]; | |
174 | if (addr != le32_to_cpu(test->hdr->offset)) { | |
175 | return; | |
176 | } | |
177 | if (test->match_data && test->size != size) { | |
178 | return; | |
179 | } | |
180 | if (test->match_data && val != test->hdr->data) { | |
181 | return; | |
182 | } | |
183 | pci_testdev_inc(test, 1); | |
184 | } | |
185 | ||
186 | static uint64_t | |
187 | pci_testdev_read(void *opaque, hwaddr addr, unsigned size) | |
188 | { | |
189 | PCITestDevState *d = opaque; | |
190 | const char *buf; | |
191 | IOTest *test; | |
192 | if (d->current < 0) { | |
193 | return 0; | |
194 | } | |
195 | test = &d->tests[d->current]; | |
196 | buf = (const char *)test->hdr; | |
197 | if (addr + size >= test->bufsize) { | |
198 | return 0; | |
199 | } | |
200 | if (test->hasnotifier) { | |
201 | event_notifier_test_and_clear(&test->notifier); | |
202 | } | |
203 | return buf[addr]; | |
204 | } | |
205 | ||
206 | static void | |
207 | pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val, | |
208 | unsigned size) | |
209 | { | |
210 | pci_testdev_write(opaque, addr, val, size, 0); | |
211 | } | |
212 | ||
213 | static void | |
214 | pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val, | |
215 | unsigned size) | |
216 | { | |
217 | pci_testdev_write(opaque, addr, val, size, 1); | |
218 | } | |
219 | ||
220 | static const MemoryRegionOps pci_testdev_mmio_ops = { | |
221 | .read = pci_testdev_read, | |
222 | .write = pci_testdev_mmio_write, | |
223 | .endianness = DEVICE_LITTLE_ENDIAN, | |
224 | .impl = { | |
225 | .min_access_size = 1, | |
226 | .max_access_size = 1, | |
227 | }, | |
228 | }; | |
229 | ||
230 | static const MemoryRegionOps pci_testdev_pio_ops = { | |
231 | .read = pci_testdev_read, | |
232 | .write = pci_testdev_pio_write, | |
233 | .endianness = DEVICE_LITTLE_ENDIAN, | |
234 | .impl = { | |
235 | .min_access_size = 1, | |
236 | .max_access_size = 1, | |
237 | }, | |
238 | }; | |
239 | ||
9af21dbe | 240 | static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) |
22773d60 | 241 | { |
40108d0a | 242 | PCITestDevState *d = PCI_TEST_DEV(pci_dev); |
22773d60 MT |
243 | uint8_t *pci_conf; |
244 | char *name; | |
245 | int r, i; | |
45aa4e8e | 246 | bool fastmmio = kvm_ioeventfd_any_length_enabled(); |
22773d60 | 247 | |
6d27a409 | 248 | pci_conf = pci_dev->config; |
22773d60 MT |
249 | |
250 | pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */ | |
251 | ||
3c161542 | 252 | memory_region_init_io(&d->mmio, OBJECT(d), &pci_testdev_mmio_ops, d, |
22773d60 | 253 | "pci-testdev-mmio", IOTEST_MEMSIZE * 2); |
3c161542 | 254 | memory_region_init_io(&d->portio, OBJECT(d), &pci_testdev_pio_ops, d, |
22773d60 | 255 | "pci-testdev-portio", IOTEST_IOSIZE * 2); |
6d27a409 AF |
256 | pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio); |
257 | pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio); | |
22773d60 | 258 | |
41746334 GH |
259 | if (d->membar_size) { |
260 | memory_region_init(&d->membar, OBJECT(d), "pci-testdev-membar", | |
261 | d->membar_size); | |
262 | pci_register_bar(pci_dev, 2, | |
263 | PCI_BASE_ADDRESS_SPACE_MEMORY | | |
264 | PCI_BASE_ADDRESS_MEM_PREFETCH | | |
265 | PCI_BASE_ADDRESS_MEM_TYPE_64, | |
266 | &d->membar); | |
267 | } | |
268 | ||
22773d60 MT |
269 | d->current = -1; |
270 | d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests); | |
271 | for (i = 0; i < IOTEST_MAX; ++i) { | |
272 | IOTest *test = &d->tests[i]; | |
273 | name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i)); | |
274 | test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1; | |
275 | test->hdr = g_malloc0(test->bufsize); | |
276 | memcpy(test->hdr->name, name, strlen(name) + 1); | |
277 | g_free(name); | |
278 | test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH); | |
22773d60 | 279 | test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd"); |
45aa4e8e MT |
280 | if (fastmmio && IOTEST_IS_MEM(i) && !test->match_data) { |
281 | test->size = 0; | |
282 | } else { | |
283 | test->size = IOTEST_ACCESS_WIDTH; | |
284 | } | |
22773d60 MT |
285 | test->hdr->test = i; |
286 | test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH; | |
287 | test->hdr->width = IOTEST_ACCESS_WIDTH; | |
288 | test->mr = IOTEST_REGION(d, i); | |
289 | if (!strcmp(IOTEST_TEST(i), "no-eventfd")) { | |
290 | test->hasnotifier = false; | |
291 | continue; | |
292 | } | |
293 | r = event_notifier_init(&test->notifier, 0); | |
294 | assert(r >= 0); | |
295 | test->hasnotifier = true; | |
296 | } | |
22773d60 MT |
297 | } |
298 | ||
299 | static void | |
300 | pci_testdev_uninit(PCIDevice *dev) | |
301 | { | |
40108d0a | 302 | PCITestDevState *d = PCI_TEST_DEV(dev); |
22773d60 MT |
303 | int i; |
304 | ||
305 | pci_testdev_reset(d); | |
306 | for (i = 0; i < IOTEST_MAX; ++i) { | |
307 | if (d->tests[i].hasnotifier) { | |
308 | event_notifier_cleanup(&d->tests[i].notifier); | |
309 | } | |
310 | g_free(d->tests[i].hdr); | |
311 | } | |
312 | g_free(d->tests); | |
22773d60 MT |
313 | } |
314 | ||
315 | static void qdev_pci_testdev_reset(DeviceState *dev) | |
316 | { | |
40108d0a | 317 | PCITestDevState *d = PCI_TEST_DEV(dev); |
22773d60 MT |
318 | pci_testdev_reset(d); |
319 | } | |
320 | ||
41746334 GH |
321 | static Property pci_testdev_properties[] = { |
322 | DEFINE_PROP_SIZE("membar", PCITestDevState, membar_size, 0), | |
323 | DEFINE_PROP_END_OF_LIST(), | |
324 | }; | |
325 | ||
22773d60 MT |
326 | static void pci_testdev_class_init(ObjectClass *klass, void *data) |
327 | { | |
328 | DeviceClass *dc = DEVICE_CLASS(klass); | |
329 | PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); | |
330 | ||
9af21dbe | 331 | k->realize = pci_testdev_realize; |
22773d60 MT |
332 | k->exit = pci_testdev_uninit; |
333 | k->vendor_id = PCI_VENDOR_ID_REDHAT; | |
334 | k->device_id = PCI_DEVICE_ID_REDHAT_TEST; | |
335 | k->revision = 0x00; | |
336 | k->class_id = PCI_CLASS_OTHERS; | |
337 | dc->desc = "PCI Test Device"; | |
125ee0ed | 338 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
22773d60 | 339 | dc->reset = qdev_pci_testdev_reset; |
41746334 | 340 | dc->props = pci_testdev_properties; |
22773d60 MT |
341 | } |
342 | ||
343 | static const TypeInfo pci_testdev_info = { | |
40108d0a | 344 | .name = TYPE_PCI_TEST_DEV, |
22773d60 MT |
345 | .parent = TYPE_PCI_DEVICE, |
346 | .instance_size = sizeof(PCITestDevState), | |
347 | .class_init = pci_testdev_class_init, | |
fd3b02c8 EH |
348 | .interfaces = (InterfaceInfo[]) { |
349 | { INTERFACE_CONVENTIONAL_PCI_DEVICE }, | |
350 | { }, | |
351 | }, | |
22773d60 MT |
352 | }; |
353 | ||
354 | static void pci_testdev_register_types(void) | |
355 | { | |
356 | type_register_static(&pci_testdev_info); | |
357 | } | |
358 | ||
359 | type_init(pci_testdev_register_types) |