1
2
3
4
5
6
7
8
9
10#include "qemu/osdep.h"
11#include <glib.h>
12#include "libqtest.h"
13#include "libqos/virtio.h"
14#include "libqos/virtio-mmio.h"
15#include "libqos/malloc.h"
16#include "libqos/malloc-generic.h"
17
18static uint8_t qvirtio_mmio_config_readb(QVirtioDevice *d, uint64_t addr)
19{
20 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
21 return readb(dev->addr + addr);
22}
23
24static uint16_t qvirtio_mmio_config_readw(QVirtioDevice *d, uint64_t addr)
25{
26 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
27 return readw(dev->addr + addr);
28}
29
30static uint32_t qvirtio_mmio_config_readl(QVirtioDevice *d, uint64_t addr)
31{
32 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
33 return readl(dev->addr + addr);
34}
35
36static uint64_t qvirtio_mmio_config_readq(QVirtioDevice *d, uint64_t addr)
37{
38 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
39 return readq(dev->addr + addr);
40}
41
42static uint32_t qvirtio_mmio_get_features(QVirtioDevice *d)
43{
44 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
45 writel(dev->addr + QVIRTIO_MMIO_HOST_FEATURES_SEL, 0);
46 return readl(dev->addr + QVIRTIO_MMIO_HOST_FEATURES);
47}
48
49static void qvirtio_mmio_set_features(QVirtioDevice *d, uint32_t features)
50{
51 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
52 dev->features = features;
53 writel(dev->addr + QVIRTIO_MMIO_GUEST_FEATURES_SEL, 0);
54 writel(dev->addr + QVIRTIO_MMIO_GUEST_FEATURES, features);
55}
56
57static uint32_t qvirtio_mmio_get_guest_features(QVirtioDevice *d)
58{
59 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
60 return dev->features;
61}
62
63static uint8_t qvirtio_mmio_get_status(QVirtioDevice *d)
64{
65 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
66 return (uint8_t)readl(dev->addr + QVIRTIO_MMIO_DEVICE_STATUS);
67}
68
69static void qvirtio_mmio_set_status(QVirtioDevice *d, uint8_t status)
70{
71 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
72 writel(dev->addr + QVIRTIO_MMIO_DEVICE_STATUS, (uint32_t)status);
73}
74
75static bool qvirtio_mmio_get_queue_isr_status(QVirtioDevice *d, QVirtQueue *vq)
76{
77 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
78 uint32_t isr;
79
80 isr = readl(dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 1;
81 if (isr != 0) {
82 writel(dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 1);
83 return true;
84 }
85
86 return false;
87}
88
89static bool qvirtio_mmio_get_config_isr_status(QVirtioDevice *d)
90{
91 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
92 uint32_t isr;
93
94 isr = readl(dev->addr + QVIRTIO_MMIO_INTERRUPT_STATUS) & 2;
95 if (isr != 0) {
96 writel(dev->addr + QVIRTIO_MMIO_INTERRUPT_ACK, 2);
97 return true;
98 }
99
100 return false;
101}
102
103static void qvirtio_mmio_queue_select(QVirtioDevice *d, uint16_t index)
104{
105 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
106 writel(dev->addr + QVIRTIO_MMIO_QUEUE_SEL, (uint32_t)index);
107
108 g_assert_cmphex(readl(dev->addr + QVIRTIO_MMIO_QUEUE_PFN), ==, 0);
109}
110
111static uint16_t qvirtio_mmio_get_queue_size(QVirtioDevice *d)
112{
113 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
114 return (uint16_t)readl(dev->addr + QVIRTIO_MMIO_QUEUE_NUM_MAX);
115}
116
117static void qvirtio_mmio_set_queue_address(QVirtioDevice *d, uint32_t pfn)
118{
119 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
120 writel(dev->addr + QVIRTIO_MMIO_QUEUE_PFN, pfn);
121}
122
123static QVirtQueue *qvirtio_mmio_virtqueue_setup(QVirtioDevice *d,
124 QGuestAllocator *alloc, uint16_t index)
125{
126 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
127 QVirtQueue *vq;
128 uint64_t addr;
129
130 vq = g_malloc0(sizeof(*vq));
131 qvirtio_mmio_queue_select(d, index);
132 writel(dev->addr + QVIRTIO_MMIO_QUEUE_ALIGN, dev->page_size);
133
134 vq->index = index;
135 vq->size = qvirtio_mmio_get_queue_size(d);
136 vq->free_head = 0;
137 vq->num_free = vq->size;
138 vq->align = dev->page_size;
139 vq->indirect = (dev->features & QVIRTIO_F_RING_INDIRECT_DESC) != 0;
140 vq->event = (dev->features & QVIRTIO_F_RING_EVENT_IDX) != 0;
141
142 writel(dev->addr + QVIRTIO_MMIO_QUEUE_NUM, vq->size);
143
144
145 g_assert_cmpint(vq->size, !=, 0);
146
147
148 g_assert_cmpint(vq->size & (vq->size - 1), ==, 0);
149
150 addr = guest_alloc(alloc, qvring_size(vq->size, dev->page_size));
151 qvring_init(alloc, vq, addr);
152 qvirtio_mmio_set_queue_address(d, vq->desc / dev->page_size);
153
154 return vq;
155}
156
157static void qvirtio_mmio_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
158{
159 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
160 writel(dev->addr + QVIRTIO_MMIO_QUEUE_NOTIFY, vq->index);
161}
162
163const QVirtioBus qvirtio_mmio = {
164 .config_readb = qvirtio_mmio_config_readb,
165 .config_readw = qvirtio_mmio_config_readw,
166 .config_readl = qvirtio_mmio_config_readl,
167 .config_readq = qvirtio_mmio_config_readq,
168 .get_features = qvirtio_mmio_get_features,
169 .set_features = qvirtio_mmio_set_features,
170 .get_guest_features = qvirtio_mmio_get_guest_features,
171 .get_status = qvirtio_mmio_get_status,
172 .set_status = qvirtio_mmio_set_status,
173 .get_queue_isr_status = qvirtio_mmio_get_queue_isr_status,
174 .get_config_isr_status = qvirtio_mmio_get_config_isr_status,
175 .queue_select = qvirtio_mmio_queue_select,
176 .get_queue_size = qvirtio_mmio_get_queue_size,
177 .set_queue_address = qvirtio_mmio_set_queue_address,
178 .virtqueue_setup = qvirtio_mmio_virtqueue_setup,
179 .virtqueue_kick = qvirtio_mmio_virtqueue_kick,
180};
181
182QVirtioMMIODevice *qvirtio_mmio_init_device(uint64_t addr, uint32_t page_size)
183{
184 QVirtioMMIODevice *dev;
185 uint32_t magic;
186 dev = g_malloc0(sizeof(*dev));
187
188 magic = readl(addr + QVIRTIO_MMIO_MAGIC_VALUE);
189 g_assert(magic == ('v' | 'i' << 8 | 'r' << 16 | 't' << 24));
190
191 dev->addr = addr;
192 dev->page_size = page_size;
193 dev->vdev.device_type = readl(addr + QVIRTIO_MMIO_DEVICE_ID);
194
195 writel(addr + QVIRTIO_MMIO_GUEST_PAGE_SIZE, page_size);
196
197 return dev;
198}
199
