1
2
3
4
5
6
7
8
9
10#include "qemu/osdep.h"
11#include "libqtest.h"
12#include "libqos/virtio.h"
13#include "libqos/virtio-pci.h"
14#include "libqos/pci.h"
15#include "libqos/pci-pc.h"
16#include "libqos/malloc.h"
17#include "libqos/malloc-pc.h"
18#include "standard-headers/linux/virtio_ring.h"
19#include "standard-headers/linux/virtio_pci.h"
20
21#include "hw/pci/pci.h"
22#include "hw/pci/pci_regs.h"
23
24typedef struct QVirtioPCIForeachData {
25 void (*func)(QVirtioDevice *d, void *data);
26 uint16_t device_type;
27 bool has_slot;
28 int slot;
29 void *user_data;
30} QVirtioPCIForeachData;
31
32void qvirtio_pci_device_free(QVirtioPCIDevice *dev)
33{
34 g_free(dev->pdev);
35 g_free(dev);
36}
37
38static QVirtioPCIDevice *qpcidevice_to_qvirtiodevice(QPCIDevice *pdev)
39{
40 QVirtioPCIDevice *vpcidev;
41 vpcidev = g_malloc0(sizeof(*vpcidev));
42
43 if (pdev) {
44 vpcidev->pdev = pdev;
45 vpcidev->vdev.device_type =
46 qpci_config_readw(vpcidev->pdev, PCI_SUBSYSTEM_ID);
47 }
48
49 vpcidev->config_msix_entry = -1;
50
51 return vpcidev;
52}
53
54static void qvirtio_pci_foreach_callback(
55 QPCIDevice *dev, int devfn, void *data)
56{
57 QVirtioPCIForeachData *d = data;
58 QVirtioPCIDevice *vpcidev = qpcidevice_to_qvirtiodevice(dev);
59
60 if (vpcidev->vdev.device_type == d->device_type &&
61 (!d->has_slot || vpcidev->pdev->devfn == d->slot << 3)) {
62 d->func(&vpcidev->vdev, d->user_data);
63 } else {
64 qvirtio_pci_device_free(vpcidev);
65 }
66}
67
68static void qvirtio_pci_assign_device(QVirtioDevice *d, void *data)
69{
70 QVirtioPCIDevice **vpcidev = data;
71 assert(!*vpcidev);
72 *vpcidev = (QVirtioPCIDevice *)d;
73}
74
75#define CONFIG_BASE(dev) (VIRTIO_PCI_CONFIG_OFF((dev)->pdev->msix_enabled))
76
77static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
78{
79 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
80 return qpci_io_readb(dev->pdev, dev->bar, CONFIG_BASE(dev) + off);
81}
82
83
84
85
86
87
88
89
90
91static uint16_t qvirtio_pci_config_readw(QVirtioDevice *d, uint64_t off)
92{
93 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
94 uint16_t value;
95
96 value = qpci_io_readw(dev->pdev, dev->bar, CONFIG_BASE(dev) + off);
97 if (qvirtio_is_big_endian(d)) {
98 value = bswap16(value);
99 }
100 return value;
101}
102
103static uint32_t qvirtio_pci_config_readl(QVirtioDevice *d, uint64_t off)
104{
105 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
106 uint32_t value;
107
108 value = qpci_io_readl(dev->pdev, dev->bar, CONFIG_BASE(dev) + off);
109 if (qvirtio_is_big_endian(d)) {
110 value = bswap32(value);
111 }
112 return value;
113}
114
115static uint64_t qvirtio_pci_config_readq(QVirtioDevice *d, uint64_t off)
116{
117 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
118 uint64_t val;
119
120 val = qpci_io_readq(dev->pdev, dev->bar, CONFIG_BASE(dev) + off);
121 if (qvirtio_is_big_endian(d)) {
122 val = bswap64(val);
123 }
124
125 return val;
126}
127
128static uint32_t qvirtio_pci_get_features(QVirtioDevice *d)
129{
130 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
131 return qpci_io_readl(dev->pdev, dev->bar, VIRTIO_PCI_HOST_FEATURES);
132}
133
134static void qvirtio_pci_set_features(QVirtioDevice *d, uint32_t features)
135{
136 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
137 qpci_io_writel(dev->pdev, dev->bar, VIRTIO_PCI_GUEST_FEATURES, features);
138}
139
140static uint32_t qvirtio_pci_get_guest_features(QVirtioDevice *d)
141{
142 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
143 return qpci_io_readl(dev->pdev, dev->bar, VIRTIO_PCI_GUEST_FEATURES);
144}
145
146static uint8_t qvirtio_pci_get_status(QVirtioDevice *d)
147{
148 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
149 return qpci_io_readb(dev->pdev, dev->bar, VIRTIO_PCI_STATUS);
150}
151
152static void qvirtio_pci_set_status(QVirtioDevice *d, uint8_t status)
153{
154 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
155 qpci_io_writeb(dev->pdev, dev->bar, VIRTIO_PCI_STATUS, status);
156}
157
158static bool qvirtio_pci_get_queue_isr_status(QVirtioDevice *d, QVirtQueue *vq)
159{
160 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
161 QVirtQueuePCI *vqpci = (QVirtQueuePCI *)vq;
162 uint32_t data;
163
164 if (dev->pdev->msix_enabled) {
165 g_assert_cmpint(vqpci->msix_entry, !=, -1);
166 if (qpci_msix_masked(dev->pdev, vqpci->msix_entry)) {
167
168 return qpci_msix_pending(dev->pdev, vqpci->msix_entry);
169 } else {
170 data = readl(vqpci->msix_addr);
171 if (data == vqpci->msix_data) {
172 writel(vqpci->msix_addr, 0);
173 return true;
174 } else {
175 return false;
176 }
177 }
178 } else {
179 return qpci_io_readb(dev->pdev, dev->bar, VIRTIO_PCI_ISR) & 1;
180 }
181}
182
183static bool qvirtio_pci_get_config_isr_status(QVirtioDevice *d)
184{
185 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
186 uint32_t data;
187
188 if (dev->pdev->msix_enabled) {
189 g_assert_cmpint(dev->config_msix_entry, !=, -1);
190 if (qpci_msix_masked(dev->pdev, dev->config_msix_entry)) {
191
192 return qpci_msix_pending(dev->pdev, dev->config_msix_entry);
193 } else {
194 data = readl(dev->config_msix_addr);
195 if (data == dev->config_msix_data) {
196 writel(dev->config_msix_addr, 0);
197 return true;
198 } else {
199 return false;
200 }
201 }
202 } else {
203 return qpci_io_readb(dev->pdev, dev->bar, VIRTIO_PCI_ISR) & 2;
204 }
205}
206
207static void qvirtio_pci_queue_select(QVirtioDevice *d, uint16_t index)
208{
209 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
210 qpci_io_writeb(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_SEL, index);
211}
212
213static uint16_t qvirtio_pci_get_queue_size(QVirtioDevice *d)
214{
215 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
216 return qpci_io_readw(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_NUM);
217}
218
219static void qvirtio_pci_set_queue_address(QVirtioDevice *d, uint32_t pfn)
220{
221 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
222 qpci_io_writel(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_PFN, pfn);
223}
224
225static QVirtQueue *qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
226 QGuestAllocator *alloc, uint16_t index)
227{
228 uint32_t feat;
229 uint64_t addr;
230 QVirtQueuePCI *vqpci;
231
232 vqpci = g_malloc0(sizeof(*vqpci));
233 feat = qvirtio_pci_get_guest_features(d);
234
235 qvirtio_pci_queue_select(d, index);
236 vqpci->vq.index = index;
237 vqpci->vq.size = qvirtio_pci_get_queue_size(d);
238 vqpci->vq.free_head = 0;
239 vqpci->vq.num_free = vqpci->vq.size;
240 vqpci->vq.align = VIRTIO_PCI_VRING_ALIGN;
241 vqpci->vq.indirect = (feat & (1u << VIRTIO_RING_F_INDIRECT_DESC)) != 0;
242 vqpci->vq.event = (feat & (1u << VIRTIO_RING_F_EVENT_IDX)) != 0;
243
244 vqpci->msix_entry = -1;
245 vqpci->msix_addr = 0;
246 vqpci->msix_data = 0x12345678;
247
248
249 g_assert_cmpint(vqpci->vq.size, !=, 0);
250
251
252 g_assert_cmpint(vqpci->vq.size & (vqpci->vq.size - 1), ==, 0);
253
254 addr = guest_alloc(alloc, qvring_size(vqpci->vq.size,
255 VIRTIO_PCI_VRING_ALIGN));
256 qvring_init(alloc, &vqpci->vq, addr);
257 qvirtio_pci_set_queue_address(d, vqpci->vq.desc / VIRTIO_PCI_VRING_ALIGN);
258
259 return &vqpci->vq;
260}
261
262static void qvirtio_pci_virtqueue_cleanup(QVirtQueue *vq,
263 QGuestAllocator *alloc)
264{
265 QVirtQueuePCI *vqpci = container_of(vq, QVirtQueuePCI, vq);
266
267 guest_free(alloc, vq->desc);
268 g_free(vqpci);
269}
270
271static void qvirtio_pci_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
272{
273 QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
274 qpci_io_writew(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_NOTIFY, vq->index);
275}
276
277const QVirtioBus qvirtio_pci = {
278 .config_readb = qvirtio_pci_config_readb,
279 .config_readw = qvirtio_pci_config_readw,
280 .config_readl = qvirtio_pci_config_readl,
281 .config_readq = qvirtio_pci_config_readq,
282 .get_features = qvirtio_pci_get_features,
283 .set_features = qvirtio_pci_set_features,
284 .get_guest_features = qvirtio_pci_get_guest_features,
285 .get_status = qvirtio_pci_get_status,
286 .set_status = qvirtio_pci_set_status,
287 .get_queue_isr_status = qvirtio_pci_get_queue_isr_status,
288 .get_config_isr_status = qvirtio_pci_get_config_isr_status,
289 .queue_select = qvirtio_pci_queue_select,
290 .get_queue_size = qvirtio_pci_get_queue_size,
291 .set_queue_address = qvirtio_pci_set_queue_address,
292 .virtqueue_setup = qvirtio_pci_virtqueue_setup,
293 .virtqueue_cleanup = qvirtio_pci_virtqueue_cleanup,
294 .virtqueue_kick = qvirtio_pci_virtqueue_kick,
295};
296
297static void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
298 bool has_slot, int slot,
299 void (*func)(QVirtioDevice *d, void *data), void *data)
300{
301 QVirtioPCIForeachData d = { .func = func,
302 .device_type = device_type,
303 .has_slot = has_slot,
304 .slot = slot,
305 .user_data = data };
306
307 qpci_device_foreach(bus, PCI_VENDOR_ID_REDHAT_QUMRANET, -1,
308 qvirtio_pci_foreach_callback, &d);
309}
310
311QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type)
312{
313 QVirtioPCIDevice *dev = NULL;
314
315 qvirtio_pci_foreach(bus, device_type, false, 0,
316 qvirtio_pci_assign_device, &dev);
317
318 dev->vdev.bus = &qvirtio_pci;
319
320 return dev;
321}
322
323QVirtioPCIDevice *qvirtio_pci_device_find_slot(QPCIBus *bus,
324 uint16_t device_type, int slot)
325{
326 QVirtioPCIDevice *dev = NULL;
327
328 qvirtio_pci_foreach(bus, device_type, true, slot,
329 qvirtio_pci_assign_device, &dev);
330
331 dev->vdev.bus = &qvirtio_pci;
332
333 return dev;
334}
335
336void qvirtio_pci_device_enable(QVirtioPCIDevice *d)
337{
338 qpci_device_enable(d->pdev);
339 d->bar = qpci_iomap(d->pdev, 0, NULL);
340}
341
342void qvirtio_pci_device_disable(QVirtioPCIDevice *d)
343{
344 qpci_iounmap(d->pdev, d->bar);
345}
346
347void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,
348 QGuestAllocator *alloc, uint16_t entry)
349{
350 uint16_t vector;
351 uint32_t control;
352 uint64_t off;
353
354 g_assert(d->pdev->msix_enabled);
355 off = d->pdev->msix_table_off + (entry * 16);
356
357 g_assert_cmpint(entry, >=, 0);
358 g_assert_cmpint(entry, <, qpci_msix_table_size(d->pdev));
359 vqpci->msix_entry = entry;
360
361 vqpci->msix_addr = guest_alloc(alloc, 4);
362 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
363 off + PCI_MSIX_ENTRY_LOWER_ADDR, vqpci->msix_addr & ~0UL);
364 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
365 off + PCI_MSIX_ENTRY_UPPER_ADDR,
366 (vqpci->msix_addr >> 32) & ~0UL);
367 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
368 off + PCI_MSIX_ENTRY_DATA, vqpci->msix_data);
369
370 control = qpci_io_readl(d->pdev, d->pdev->msix_table_bar,
371 off + PCI_MSIX_ENTRY_VECTOR_CTRL);
372 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
373 off + PCI_MSIX_ENTRY_VECTOR_CTRL,
374 control & ~PCI_MSIX_ENTRY_CTRL_MASKBIT);
375
376 qvirtio_pci_queue_select(&d->vdev, vqpci->vq.index);
377 qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR, entry);
378 vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_QUEUE_VECTOR);
379 g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
380}
381
382void qvirtio_pci_set_msix_configuration_vector(QVirtioPCIDevice *d,
383 QGuestAllocator *alloc, uint16_t entry)
384{
385 uint16_t vector;
386 uint32_t control;
387 uint64_t off;
388
389 g_assert(d->pdev->msix_enabled);
390 off = d->pdev->msix_table_off + (entry * 16);
391
392 g_assert_cmpint(entry, >=, 0);
393 g_assert_cmpint(entry, <, qpci_msix_table_size(d->pdev));
394 d->config_msix_entry = entry;
395
396 d->config_msix_data = 0x12345678;
397 d->config_msix_addr = guest_alloc(alloc, 4);
398
399 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
400 off + PCI_MSIX_ENTRY_LOWER_ADDR, d->config_msix_addr & ~0UL);
401 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
402 off + PCI_MSIX_ENTRY_UPPER_ADDR,
403 (d->config_msix_addr >> 32) & ~0UL);
404 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
405 off + PCI_MSIX_ENTRY_DATA, d->config_msix_data);
406
407 control = qpci_io_readl(d->pdev, d->pdev->msix_table_bar,
408 off + PCI_MSIX_ENTRY_VECTOR_CTRL);
409 qpci_io_writel(d->pdev, d->pdev->msix_table_bar,
410 off + PCI_MSIX_ENTRY_VECTOR_CTRL,
411 control & ~PCI_MSIX_ENTRY_CTRL_MASKBIT);
412
413 qpci_io_writew(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR, entry);
414 vector = qpci_io_readw(d->pdev, d->bar, VIRTIO_MSI_CONFIG_VECTOR);
415 g_assert_cmphex(vector, !=, VIRTIO_MSI_NO_VECTOR);
416}
417
