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