[qemu.git] / hw / misc / pci-testdev.c

/*
 * QEMU PCI test device
 *
 * Copyright (c) 2012 Red Hat Inc.
 * Author: Michael S. Tsirkin <[email protected]>
 *
 * 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 {
    PCIDevice dev;
    MemoryRegion mmio;
    MemoryRegion portio;
    IOTest *tests;
    int current;
} PCITestDevState;

#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 int pci_testdev_init(PCIDevice *pci_dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, dev, pci_dev);
    uint8_t *pci_conf;
    char *name;
    int r, i;

    pci_conf = d->dev.config;

    pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */

    memory_region_init_io(&d->mmio, &pci_testdev_mmio_ops, d,
                          "pci-testdev-mmio", IOTEST_MEMSIZE * 2);
    memory_region_init_io(&d->portio, &pci_testdev_pio_ops, d,
                          "pci-testdev-portio", IOTEST_IOSIZE * 2);
    pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
    pci_register_bar(&d->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;
    }

    return 0;
}

static void
pci_testdev_uninit(PCIDevice *dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, 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);
    memory_region_destroy(&d->mmio);
    memory_region_destroy(&d->portio);
}

static void qdev_pci_testdev_reset(DeviceState *dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, dev.qdev, 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->init = pci_testdev_init;
    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";
    dc->reset = qdev_pci_testdev_reset;
}

static const TypeInfo pci_testdev_info = {
    .name          = "pci-testdev",
    .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)
Commit	Line	Data
22773d60 MT	1	/*
	2	* QEMU PCI test device
	3	*
	4	* Copyright (c) 2012 Red Hat Inc.
	5	* Author: Michael S. Tsirkin <[email protected]>
	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	PCIDevice dev;
80	MemoryRegion mmio;
81	MemoryRegion portio;
82	IOTest *tests;
83	int current;
84	} PCITestDevState;
85
86	#define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio"))
87	#define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ? &(d)->mmio : &(d)->portio)
88	#define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE)
89	#define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \
90	PCI_BASE_ADDRESS_SPACE_IO)
91
92	static int pci_testdev_start(IOTest *test)
93	{
94	test->hdr->count = 0;
95	if (!test->hasnotifier) {
96	return 0;
97	}
98	event_notifier_test_and_clear(&test->notifier);
99	memory_region_add_eventfd(test->mr,
100	le32_to_cpu(test->hdr->offset),
101	test->size,
102	test->match_data,
103	test->hdr->data,
104	&test->notifier);
105	return 0;
106	}
107
108	static void pci_testdev_stop(IOTest *test)
109	{
110	if (!test->hasnotifier) {
111	return;
112	}
113	memory_region_del_eventfd(test->mr,
114	le32_to_cpu(test->hdr->offset),
115	test->size,
116	test->match_data,
117	test->hdr->data,
118	&test->notifier);
119	}
120
121	static void
122	pci_testdev_reset(PCITestDevState *d)
123	{
124	if (d->current == -1) {
125	return;
126	}
127	pci_testdev_stop(&d->tests[d->current]);
128	d->current = -1;
129	}
130
131	static void pci_testdev_inc(IOTest *test, unsigned inc)
132	{
133	uint32_t c = le32_to_cpu(test->hdr->count);
134	test->hdr->count = cpu_to_le32(c + inc);
135	}
136
137	static void
138	pci_testdev_write(void *opaque, hwaddr addr, uint64_t val,
139	unsigned size, int type)
140	{
141	PCITestDevState *d = opaque;
142	IOTest *test;
143	int t, r;
144
145	if (addr == offsetof(PCITestDevHdr, test)) {
146	pci_testdev_reset(d);
147	if (val >= IOTEST_MAX_TEST) {
148	return;
149	}
150	t = type * IOTEST_MAX_TEST + val;
151	r = pci_testdev_start(&d->tests[t]);
152	if (r < 0) {
153	return;
154	}
155	d->current = t;
156	return;
157	}
158	if (d->current < 0) {
159	return;
160	}
161	test = &d->tests[d->current];
162	if (addr != le32_to_cpu(test->hdr->offset)) {
163	return;
164	}
165	if (test->match_data && test->size != size) {
166	return;
167	}
168	if (test->match_data && val != test->hdr->data) {
169	return;
170	}
171	pci_testdev_inc(test, 1);
172	}
173
174	static uint64_t
175	pci_testdev_read(void *opaque, hwaddr addr, unsigned size)
176	{
177	PCITestDevState *d = opaque;
178	const char *buf;
179	IOTest *test;
180	if (d->current < 0) {
181	return 0;
182	}
183	test = &d->tests[d->current];
184	buf = (const char *)test->hdr;
185	if (addr + size >= test->bufsize) {
186	return 0;
187	}
188	if (test->hasnotifier) {
189	event_notifier_test_and_clear(&test->notifier);
190	}
191	return buf[addr];
192	}
193
194	static void
195	pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val,
196	unsigned size)
197	{
198	pci_testdev_write(opaque, addr, val, size, 0);
199	}
200
201	static void
202	pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val,
203	unsigned size)
204	{
205	pci_testdev_write(opaque, addr, val, size, 1);
206	}
207
208	static const MemoryRegionOps pci_testdev_mmio_ops = {
209	.read = pci_testdev_read,
210	.write = pci_testdev_mmio_write,
211	.endianness = DEVICE_LITTLE_ENDIAN,
212	.impl = {
213	.min_access_size = 1,
214	.max_access_size = 1,
215	},
216	};
217
218	static const MemoryRegionOps pci_testdev_pio_ops = {
219	.read = pci_testdev_read,
220	.write = pci_testdev_pio_write,
221	.endianness = DEVICE_LITTLE_ENDIAN,
222	.impl = {
223	.min_access_size = 1,
224	.max_access_size = 1,
225	},
226	};
227
228	static int pci_testdev_init(PCIDevice *pci_dev)
229	{
230	PCITestDevState *d = DO_UPCAST(PCITestDevState, dev, pci_dev);
231	uint8_t *pci_conf;
232	char *name;
233	int r, i;
234
235	pci_conf = d->dev.config;
236
237	pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */
238
239	memory_region_init_io(&d->mmio, &pci_testdev_mmio_ops, d,
240	"pci-testdev-mmio", IOTEST_MEMSIZE * 2);
241	memory_region_init_io(&d->portio, &pci_testdev_pio_ops, d,
242	"pci-testdev-portio", IOTEST_IOSIZE * 2);
243	pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
244	pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);
245
246	d->current = -1;
247	d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests);
248	for (i = 0; i < IOTEST_MAX; ++i) {
249	IOTest *test = &d->tests[i];
250	name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i));
251	test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1;
252	test->hdr = g_malloc0(test->bufsize);
253	memcpy(test->hdr->name, name, strlen(name) + 1);
254	g_free(name);
255	test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
256	test->size = IOTEST_ACCESS_WIDTH;
257	test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
258	test->hdr->test = i;
259	test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
260	test->hdr->width = IOTEST_ACCESS_WIDTH;
261	test->mr = IOTEST_REGION(d, i);
262	if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
263	test->hasnotifier = false;
264	continue;
265	}
266	r = event_notifier_init(&test->notifier, 0);
267	assert(r >= 0);
268	test->hasnotifier = true;
269	}
270
271	return 0;
272	}
273
274	static void
275	pci_testdev_uninit(PCIDevice *dev)
276	{
277	PCITestDevState *d = DO_UPCAST(PCITestDevState, dev, dev);
278	int i;
279
280	pci_testdev_reset(d);
281	for (i = 0; i < IOTEST_MAX; ++i) {
282	if (d->tests[i].hasnotifier) {
283	event_notifier_cleanup(&d->tests[i].notifier);
284	}
285	g_free(d->tests[i].hdr);
286	}
287	g_free(d->tests);
288	memory_region_destroy(&d->mmio);
289	memory_region_destroy(&d->portio);
290	}
291
292	static void qdev_pci_testdev_reset(DeviceState *dev)
293	{
294	PCITestDevState *d = DO_UPCAST(PCITestDevState, dev.qdev, dev);
295	pci_testdev_reset(d);
296	}
297
298	static void pci_testdev_class_init(ObjectClass klass, void data)
299	{
300	DeviceClass *dc = DEVICE_CLASS(klass);
301	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
302
303	k->init = pci_testdev_init;
304	k->exit = pci_testdev_uninit;
305	k->vendor_id = PCI_VENDOR_ID_REDHAT;
306	k->device_id = PCI_DEVICE_ID_REDHAT_TEST;
307	k->revision = 0x00;
308	k->class_id = PCI_CLASS_OTHERS;
309	dc->desc = "PCI Test Device";
310	dc->reset = qdev_pci_testdev_reset;
311	}
312
313	static const TypeInfo pci_testdev_info = {
314	.name = "pci-testdev",
315	.parent = TYPE_PCI_DEVICE,
316	.instance_size = sizeof(PCITestDevState),
317	.class_init = pci_testdev_class_init,
318	};
319
320	static void pci_testdev_register_types(void)
321	{
322	type_register_static(&pci_testdev_info);
323	}
324
325	type_init(pci_testdev_register_types)