| /* |
| * QEMU PCI test device |
| * |
| * Copyright (c) 2012 Red Hat Inc. |
| * Author: Michael S. Tsirkin <mst@redhat.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| #include "hw/hw.h" |
| #include "hw/pci/pci.h" |
| #include "qemu/event_notifier.h" |
| #include "qemu/osdep.h" |
| |
| typedef struct PCITestDevHdr { |
| uint8_t test; |
| uint8_t width; |
| uint8_t pad0[2]; |
| uint32_t offset; |
| uint8_t data; |
| uint8_t pad1[3]; |
| uint32_t count; |
| uint8_t name[]; |
| } PCITestDevHdr; |
| |
| typedef struct IOTest { |
| MemoryRegion *mr; |
| EventNotifier notifier; |
| bool hasnotifier; |
| unsigned size; |
| bool match_data; |
| PCITestDevHdr *hdr; |
| unsigned bufsize; |
| } IOTest; |
| |
| #define IOTEST_DATAMATCH 0xFA |
| #define IOTEST_NOMATCH 0xCE |
| |
| #define IOTEST_IOSIZE 128 |
| #define IOTEST_MEMSIZE 2048 |
| |
| static const char *iotest_test[] = { |
| "no-eventfd", |
| "wildcard-eventfd", |
| "datamatch-eventfd" |
| }; |
| |
| static const char *iotest_type[] = { |
| "mmio", |
| "portio" |
| }; |
| |
| #define IOTEST_TEST(i) (iotest_test[((i) % ARRAY_SIZE(iotest_test))]) |
| #define IOTEST_TYPE(i) (iotest_type[((i) / ARRAY_SIZE(iotest_test))]) |
| #define IOTEST_MAX_TEST (ARRAY_SIZE(iotest_test)) |
| #define IOTEST_MAX_TYPE (ARRAY_SIZE(iotest_type)) |
| #define IOTEST_MAX (IOTEST_MAX_TEST * IOTEST_MAX_TYPE) |
| |
| enum { |
| IOTEST_ACCESS_NAME, |
| IOTEST_ACCESS_DATA, |
| IOTEST_ACCESS_MAX, |
| }; |
| |
| #define IOTEST_ACCESS_TYPE uint8_t |
| #define IOTEST_ACCESS_WIDTH (sizeof(uint8_t)) |
| |
| typedef struct PCITestDevState { |
| /*< private >*/ |
| PCIDevice parent_obj; |
| /*< public >*/ |
| |
| MemoryRegion mmio; |
| MemoryRegion portio; |
| IOTest *tests; |
| int current; |
| } PCITestDevState; |
| |
| #define TYPE_PCI_TEST_DEV "pci-testdev" |
| |
| #define PCI_TEST_DEV(obj) \ |
| OBJECT_CHECK(PCITestDevState, (obj), TYPE_PCI_TEST_DEV) |
| |
| #define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio")) |
| #define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ? &(d)->mmio : &(d)->portio) |
| #define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE) |
| #define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \ |
| PCI_BASE_ADDRESS_SPACE_IO) |
| |
| static int pci_testdev_start(IOTest *test) |
| { |
| test->hdr->count = 0; |
| if (!test->hasnotifier) { |
| return 0; |
| } |
| event_notifier_test_and_clear(&test->notifier); |
| memory_region_add_eventfd(test->mr, |
| le32_to_cpu(test->hdr->offset), |
| test->size, |
| test->match_data, |
| test->hdr->data, |
| &test->notifier); |
| return 0; |
| } |
| |
| static void pci_testdev_stop(IOTest *test) |
| { |
| if (!test->hasnotifier) { |
| return; |
| } |
| memory_region_del_eventfd(test->mr, |
| le32_to_cpu(test->hdr->offset), |
| test->size, |
| test->match_data, |
| test->hdr->data, |
| &test->notifier); |
| } |
| |
| static void |
| pci_testdev_reset(PCITestDevState *d) |
| { |
| if (d->current == -1) { |
| return; |
| } |
| pci_testdev_stop(&d->tests[d->current]); |
| d->current = -1; |
| } |
| |
| static void pci_testdev_inc(IOTest *test, unsigned inc) |
| { |
| uint32_t c = le32_to_cpu(test->hdr->count); |
| test->hdr->count = cpu_to_le32(c + inc); |
| } |
| |
| static void |
| pci_testdev_write(void *opaque, hwaddr addr, uint64_t val, |
| unsigned size, int type) |
| { |
| PCITestDevState *d = opaque; |
| IOTest *test; |
| int t, r; |
| |
| if (addr == offsetof(PCITestDevHdr, test)) { |
| pci_testdev_reset(d); |
| if (val >= IOTEST_MAX_TEST) { |
| return; |
| } |
| t = type * IOTEST_MAX_TEST + val; |
| r = pci_testdev_start(&d->tests[t]); |
| if (r < 0) { |
| return; |
| } |
| d->current = t; |
| return; |
| } |
| if (d->current < 0) { |
| return; |
| } |
| test = &d->tests[d->current]; |
| if (addr != le32_to_cpu(test->hdr->offset)) { |
| return; |
| } |
| if (test->match_data && test->size != size) { |
| return; |
| } |
| if (test->match_data && val != test->hdr->data) { |
| return; |
| } |
| pci_testdev_inc(test, 1); |
| } |
| |
| static uint64_t |
| pci_testdev_read(void *opaque, hwaddr addr, unsigned size) |
| { |
| PCITestDevState *d = opaque; |
| const char *buf; |
| IOTest *test; |
| if (d->current < 0) { |
| return 0; |
| } |
| test = &d->tests[d->current]; |
| buf = (const char *)test->hdr; |
| if (addr + size >= test->bufsize) { |
| return 0; |
| } |
| if (test->hasnotifier) { |
| event_notifier_test_and_clear(&test->notifier); |
| } |
| return buf[addr]; |
| } |
| |
| static void |
| pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val, |
| unsigned size) |
| { |
| pci_testdev_write(opaque, addr, val, size, 0); |
| } |
| |
| static void |
| pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val, |
| unsigned size) |
| { |
| pci_testdev_write(opaque, addr, val, size, 1); |
| } |
| |
| static const MemoryRegionOps pci_testdev_mmio_ops = { |
| .read = pci_testdev_read, |
| .write = pci_testdev_mmio_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 1, |
| }, |
| }; |
| |
| static const MemoryRegionOps pci_testdev_pio_ops = { |
| .read = pci_testdev_read, |
| .write = pci_testdev_pio_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 1, |
| }, |
| }; |
| |
| static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) |
| { |
| PCITestDevState *d = PCI_TEST_DEV(pci_dev); |
| uint8_t *pci_conf; |
| char *name; |
| int r, i; |
| |
| pci_conf = pci_dev->config; |
| |
| pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */ |
| |
| memory_region_init_io(&d->mmio, OBJECT(d), &pci_testdev_mmio_ops, d, |
| "pci-testdev-mmio", IOTEST_MEMSIZE * 2); |
| memory_region_init_io(&d->portio, OBJECT(d), &pci_testdev_pio_ops, d, |
| "pci-testdev-portio", IOTEST_IOSIZE * 2); |
| pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio); |
| pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio); |
| |
| d->current = -1; |
| d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests); |
| for (i = 0; i < IOTEST_MAX; ++i) { |
| IOTest *test = &d->tests[i]; |
| name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i)); |
| test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1; |
| test->hdr = g_malloc0(test->bufsize); |
| memcpy(test->hdr->name, name, strlen(name) + 1); |
| g_free(name); |
| test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH); |
| test->size = IOTEST_ACCESS_WIDTH; |
| test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd"); |
| test->hdr->test = i; |
| test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH; |
| test->hdr->width = IOTEST_ACCESS_WIDTH; |
| test->mr = IOTEST_REGION(d, i); |
| if (!strcmp(IOTEST_TEST(i), "no-eventfd")) { |
| test->hasnotifier = false; |
| continue; |
| } |
| r = event_notifier_init(&test->notifier, 0); |
| assert(r >= 0); |
| test->hasnotifier = true; |
| } |
| } |
| |
| static void |
| pci_testdev_uninit(PCIDevice *dev) |
| { |
| PCITestDevState *d = PCI_TEST_DEV(dev); |
| int i; |
| |
| pci_testdev_reset(d); |
| for (i = 0; i < IOTEST_MAX; ++i) { |
| if (d->tests[i].hasnotifier) { |
| event_notifier_cleanup(&d->tests[i].notifier); |
| } |
| g_free(d->tests[i].hdr); |
| } |
| g_free(d->tests); |
| } |
| |
| static void qdev_pci_testdev_reset(DeviceState *dev) |
| { |
| PCITestDevState *d = PCI_TEST_DEV(dev); |
| pci_testdev_reset(d); |
| } |
| |
| static void pci_testdev_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->realize = pci_testdev_realize; |
| k->exit = pci_testdev_uninit; |
| k->vendor_id = PCI_VENDOR_ID_REDHAT; |
| k->device_id = PCI_DEVICE_ID_REDHAT_TEST; |
| k->revision = 0x00; |
| k->class_id = PCI_CLASS_OTHERS; |
| dc->desc = "PCI Test Device"; |
| set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| dc->reset = qdev_pci_testdev_reset; |
| } |
| |
| static const TypeInfo pci_testdev_info = { |
| .name = TYPE_PCI_TEST_DEV, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PCITestDevState), |
| .class_init = pci_testdev_class_init, |
| }; |
| |
| static void pci_testdev_register_types(void) |
| { |
| type_register_static(&pci_testdev_info); |
| } |
| |
| type_init(pci_testdev_register_types) |