cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16
[qemu.git] / tests / libqos / virtio-mmio.c
1 /*
2 * libqos virtio MMIO driver
3 *
4 * Copyright (c) 2014 Marc MarĂ­
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
8 */
9
10 #include "qemu/osdep.h"
11 #include "libqtest.h"
12 #include "libqos/virtio.h"
13 #include "libqos/virtio-mmio.h"
14 #include "libqos/malloc.h"
15 #include "libqos/malloc-generic.h"
16 #include "standard-headers/linux/virtio_ring.h"
17
18 static uint8_t qvirtio_mmio_config_readb(QVirtioDevice *d, uint64_t off)
19 {
20 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
21 return readb(dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
22 }
23
24 static uint16_t qvirtio_mmio_config_readw(QVirtioDevice *d, uint64_t off)
25 {
26 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
27 return readw(dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
28 }
29
30 static uint32_t qvirtio_mmio_config_readl(QVirtioDevice *d, uint64_t off)
31 {
32 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
33 return readl(dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
34 }
35
36 static uint64_t qvirtio_mmio_config_readq(QVirtioDevice *d, uint64_t off)
37 {
38 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
39 return readq(dev->addr + QVIRTIO_MMIO_DEVICE_SPECIFIC + off);
40 }
41
42 static 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
49 static 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
57 static uint32_t qvirtio_mmio_get_guest_features(QVirtioDevice *d)
58 {
59 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
60 return dev->features;
61 }
62
63 static 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
69 static 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
75 static 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
89 static 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
103 static 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
111 static 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
117 static 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
123 static 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 & (1u << VIRTIO_RING_F_INDIRECT_DESC)) != 0;
140 vq->event = (dev->features & (1u << VIRTIO_RING_F_EVENT_IDX)) != 0;
141
142 writel(dev->addr + QVIRTIO_MMIO_QUEUE_NUM, vq->size);
143
144 /* Check different than 0 */
145 g_assert_cmpint(vq->size, !=, 0);
146
147 /* Check power of 2 */
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
157 static void qvirtio_mmio_virtqueue_cleanup(QVirtQueue *vq,
158 QGuestAllocator *alloc)
159 {
160 guest_free(alloc, vq->desc);
161 g_free(vq);
162 }
163
164 static void qvirtio_mmio_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
165 {
166 QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
167 writel(dev->addr + QVIRTIO_MMIO_QUEUE_NOTIFY, vq->index);
168 }
169
170 const QVirtioBus qvirtio_mmio = {
171 .config_readb = qvirtio_mmio_config_readb,
172 .config_readw = qvirtio_mmio_config_readw,
173 .config_readl = qvirtio_mmio_config_readl,
174 .config_readq = qvirtio_mmio_config_readq,
175 .get_features = qvirtio_mmio_get_features,
176 .set_features = qvirtio_mmio_set_features,
177 .get_guest_features = qvirtio_mmio_get_guest_features,
178 .get_status = qvirtio_mmio_get_status,
179 .set_status = qvirtio_mmio_set_status,
180 .get_queue_isr_status = qvirtio_mmio_get_queue_isr_status,
181 .get_config_isr_status = qvirtio_mmio_get_config_isr_status,
182 .queue_select = qvirtio_mmio_queue_select,
183 .get_queue_size = qvirtio_mmio_get_queue_size,
184 .set_queue_address = qvirtio_mmio_set_queue_address,
185 .virtqueue_setup = qvirtio_mmio_virtqueue_setup,
186 .virtqueue_cleanup = qvirtio_mmio_virtqueue_cleanup,
187 .virtqueue_kick = qvirtio_mmio_virtqueue_kick,
188 };
189
190 QVirtioMMIODevice *qvirtio_mmio_init_device(uint64_t addr, uint32_t page_size)
191 {
192 QVirtioMMIODevice *dev;
193 uint32_t magic;
194 dev = g_malloc0(sizeof(*dev));
195
196 magic = readl(addr + QVIRTIO_MMIO_MAGIC_VALUE);
197 g_assert(magic == ('v' | 'i' << 8 | 'r' << 16 | 't' << 24));
198
199 dev->addr = addr;
200 dev->page_size = page_size;
201 dev->vdev.device_type = readl(addr + QVIRTIO_MMIO_DEVICE_ID);
202 dev->vdev.bus = &qvirtio_mmio;
203
204 writel(addr + QVIRTIO_MMIO_GUEST_PAGE_SIZE, page_size);
205
206 return dev;
207 }