root / hw / ivshmem.c @ b903a0f7
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1 | 6cbf4c8c | Cam Macdonell | /*
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2 | 6cbf4c8c | Cam Macdonell | * Inter-VM Shared Memory PCI device.
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3 | 6cbf4c8c | Cam Macdonell | *
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4 | 6cbf4c8c | Cam Macdonell | * Author:
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5 | 6cbf4c8c | Cam Macdonell | * Cam Macdonell <cam@cs.ualberta.ca>
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6 | 6cbf4c8c | Cam Macdonell | *
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7 | 6cbf4c8c | Cam Macdonell | * Based On: cirrus_vga.c
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8 | 6cbf4c8c | Cam Macdonell | * Copyright (c) 2004 Fabrice Bellard
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9 | 6cbf4c8c | Cam Macdonell | * Copyright (c) 2004 Makoto Suzuki (suzu)
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10 | 6cbf4c8c | Cam Macdonell | *
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11 | 6cbf4c8c | Cam Macdonell | * and rtl8139.c
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12 | 6cbf4c8c | Cam Macdonell | * Copyright (c) 2006 Igor Kovalenko
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13 | 6cbf4c8c | Cam Macdonell | *
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14 | 6cbf4c8c | Cam Macdonell | * This code is licensed under the GNU GPL v2.
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15 | 6cbf4c8c | Cam Macdonell | */
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16 | 6cbf4c8c | Cam Macdonell | #include "hw.h" |
17 | 6cbf4c8c | Cam Macdonell | #include "pc.h" |
18 | 6cbf4c8c | Cam Macdonell | #include "pci.h" |
19 | 6cbf4c8c | Cam Macdonell | #include "msix.h" |
20 | 6cbf4c8c | Cam Macdonell | #include "kvm.h" |
21 | 6cbf4c8c | Cam Macdonell | |
22 | 6cbf4c8c | Cam Macdonell | #include <sys/mman.h> |
23 | 6cbf4c8c | Cam Macdonell | #include <sys/types.h> |
24 | 6cbf4c8c | Cam Macdonell | |
25 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_IOEVENTFD 0 |
26 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_MSI 1 |
27 | 6cbf4c8c | Cam Macdonell | |
28 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_PEER 0 |
29 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_MASTER 1 |
30 | 6cbf4c8c | Cam Macdonell | |
31 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_REG_BAR_SIZE 0x100 |
32 | 6cbf4c8c | Cam Macdonell | |
33 | 6cbf4c8c | Cam Macdonell | //#define DEBUG_IVSHMEM
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34 | 6cbf4c8c | Cam Macdonell | #ifdef DEBUG_IVSHMEM
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35 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_DPRINTF(fmt, ...) \
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36 | 6cbf4c8c | Cam Macdonell | do {printf("IVSHMEM: " fmt, ## __VA_ARGS__); } while (0) |
37 | 6cbf4c8c | Cam Macdonell | #else
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38 | 6cbf4c8c | Cam Macdonell | #define IVSHMEM_DPRINTF(fmt, ...)
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39 | 6cbf4c8c | Cam Macdonell | #endif
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40 | 6cbf4c8c | Cam Macdonell | |
41 | 6cbf4c8c | Cam Macdonell | typedef struct Peer { |
42 | 6cbf4c8c | Cam Macdonell | int nb_eventfds;
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43 | 6cbf4c8c | Cam Macdonell | int *eventfds;
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44 | 6cbf4c8c | Cam Macdonell | } Peer; |
45 | 6cbf4c8c | Cam Macdonell | |
46 | 6cbf4c8c | Cam Macdonell | typedef struct EventfdEntry { |
47 | 6cbf4c8c | Cam Macdonell | PCIDevice *pdev; |
48 | 6cbf4c8c | Cam Macdonell | int vector;
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49 | 6cbf4c8c | Cam Macdonell | } EventfdEntry; |
50 | 6cbf4c8c | Cam Macdonell | |
51 | 6cbf4c8c | Cam Macdonell | typedef struct IVShmemState { |
52 | 6cbf4c8c | Cam Macdonell | PCIDevice dev; |
53 | 6cbf4c8c | Cam Macdonell | uint32_t intrmask; |
54 | 6cbf4c8c | Cam Macdonell | uint32_t intrstatus; |
55 | 6cbf4c8c | Cam Macdonell | uint32_t doorbell; |
56 | 6cbf4c8c | Cam Macdonell | |
57 | 6cbf4c8c | Cam Macdonell | CharDriverState **eventfd_chr; |
58 | 6cbf4c8c | Cam Macdonell | CharDriverState *server_chr; |
59 | 6cbf4c8c | Cam Macdonell | int ivshmem_mmio_io_addr;
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60 | 6cbf4c8c | Cam Macdonell | |
61 | 6cbf4c8c | Cam Macdonell | pcibus_t mmio_addr; |
62 | 6cbf4c8c | Cam Macdonell | pcibus_t shm_pci_addr; |
63 | 6cbf4c8c | Cam Macdonell | uint64_t ivshmem_offset; |
64 | 6cbf4c8c | Cam Macdonell | uint64_t ivshmem_size; /* size of shared memory region */
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65 | 6cbf4c8c | Cam Macdonell | int shm_fd; /* shared memory file descriptor */ |
66 | 6cbf4c8c | Cam Macdonell | |
67 | 6cbf4c8c | Cam Macdonell | Peer *peers; |
68 | 6cbf4c8c | Cam Macdonell | int nb_peers; /* how many guests we have space for */ |
69 | 6cbf4c8c | Cam Macdonell | int max_peer; /* maximum numbered peer */ |
70 | 6cbf4c8c | Cam Macdonell | |
71 | 6cbf4c8c | Cam Macdonell | int vm_id;
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72 | 6cbf4c8c | Cam Macdonell | uint32_t vectors; |
73 | 6cbf4c8c | Cam Macdonell | uint32_t features; |
74 | 6cbf4c8c | Cam Macdonell | EventfdEntry *eventfd_table; |
75 | 6cbf4c8c | Cam Macdonell | |
76 | 6cbf4c8c | Cam Macdonell | char * shmobj;
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77 | 6cbf4c8c | Cam Macdonell | char * sizearg;
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78 | 6cbf4c8c | Cam Macdonell | char * role;
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79 | 6cbf4c8c | Cam Macdonell | int role_val; /* scalar to avoid multiple string comparisons */ |
80 | 6cbf4c8c | Cam Macdonell | } IVShmemState; |
81 | 6cbf4c8c | Cam Macdonell | |
82 | 6cbf4c8c | Cam Macdonell | /* registers for the Inter-VM shared memory device */
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83 | 6cbf4c8c | Cam Macdonell | enum ivshmem_registers {
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84 | 6cbf4c8c | Cam Macdonell | INTRMASK = 0,
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85 | 6cbf4c8c | Cam Macdonell | INTRSTATUS = 4,
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86 | 6cbf4c8c | Cam Macdonell | IVPOSITION = 8,
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87 | 6cbf4c8c | Cam Macdonell | DOORBELL = 12,
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88 | 6cbf4c8c | Cam Macdonell | }; |
89 | 6cbf4c8c | Cam Macdonell | |
90 | 6cbf4c8c | Cam Macdonell | static inline uint32_t ivshmem_has_feature(IVShmemState *ivs, |
91 | 6cbf4c8c | Cam Macdonell | unsigned int feature) { |
92 | 6cbf4c8c | Cam Macdonell | return (ivs->features & (1 << feature)); |
93 | 6cbf4c8c | Cam Macdonell | } |
94 | 6cbf4c8c | Cam Macdonell | |
95 | 6cbf4c8c | Cam Macdonell | static inline bool is_power_of_two(uint64_t x) { |
96 | 6cbf4c8c | Cam Macdonell | return (x & (x - 1)) == 0; |
97 | 6cbf4c8c | Cam Macdonell | } |
98 | 6cbf4c8c | Cam Macdonell | |
99 | 6cbf4c8c | Cam Macdonell | static void ivshmem_map(PCIDevice *pci_dev, int region_num, |
100 | 6cbf4c8c | Cam Macdonell | pcibus_t addr, pcibus_t size, int type)
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101 | 6cbf4c8c | Cam Macdonell | { |
102 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = DO_UPCAST(IVShmemState, dev, pci_dev); |
103 | 6cbf4c8c | Cam Macdonell | |
104 | 6cbf4c8c | Cam Macdonell | s->shm_pci_addr = addr; |
105 | 6cbf4c8c | Cam Macdonell | |
106 | 6cbf4c8c | Cam Macdonell | if (s->ivshmem_offset > 0) { |
107 | 6cbf4c8c | Cam Macdonell | cpu_register_physical_memory(s->shm_pci_addr, s->ivshmem_size, |
108 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset); |
109 | 6cbf4c8c | Cam Macdonell | } |
110 | 6cbf4c8c | Cam Macdonell | |
111 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("guest pci addr = %" FMT_PCIBUS ", guest h/w addr = %" |
112 | 6cbf4c8c | Cam Macdonell | PRIu64 ", size = %" FMT_PCIBUS "\n", addr, s->ivshmem_offset, size); |
113 | 6cbf4c8c | Cam Macdonell | |
114 | 6cbf4c8c | Cam Macdonell | } |
115 | 6cbf4c8c | Cam Macdonell | |
116 | 6cbf4c8c | Cam Macdonell | /* accessing registers - based on rtl8139 */
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117 | 6cbf4c8c | Cam Macdonell | static void ivshmem_update_irq(IVShmemState *s, int val) |
118 | 6cbf4c8c | Cam Macdonell | { |
119 | 6cbf4c8c | Cam Macdonell | int isr;
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120 | 6cbf4c8c | Cam Macdonell | isr = (s->intrstatus & s->intrmask) & 0xffffffff;
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121 | 6cbf4c8c | Cam Macdonell | |
122 | 6cbf4c8c | Cam Macdonell | /* don't print ISR resets */
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123 | 6cbf4c8c | Cam Macdonell | if (isr) {
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124 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("Set IRQ to %d (%04x %04x)\n",
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125 | 6cbf4c8c | Cam Macdonell | isr ? 1 : 0, s->intrstatus, s->intrmask); |
126 | 6cbf4c8c | Cam Macdonell | } |
127 | 6cbf4c8c | Cam Macdonell | |
128 | 6cbf4c8c | Cam Macdonell | qemu_set_irq(s->dev.irq[0], (isr != 0)); |
129 | 6cbf4c8c | Cam Macdonell | } |
130 | 6cbf4c8c | Cam Macdonell | |
131 | 6cbf4c8c | Cam Macdonell | static void ivshmem_IntrMask_write(IVShmemState *s, uint32_t val) |
132 | 6cbf4c8c | Cam Macdonell | { |
133 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("IntrMask write(w) val = 0x%04x\n", val);
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134 | 6cbf4c8c | Cam Macdonell | |
135 | 6cbf4c8c | Cam Macdonell | s->intrmask = val; |
136 | 6cbf4c8c | Cam Macdonell | |
137 | 6cbf4c8c | Cam Macdonell | ivshmem_update_irq(s, val); |
138 | 6cbf4c8c | Cam Macdonell | } |
139 | 6cbf4c8c | Cam Macdonell | |
140 | 6cbf4c8c | Cam Macdonell | static uint32_t ivshmem_IntrMask_read(IVShmemState *s)
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141 | 6cbf4c8c | Cam Macdonell | { |
142 | 6cbf4c8c | Cam Macdonell | uint32_t ret = s->intrmask; |
143 | 6cbf4c8c | Cam Macdonell | |
144 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("intrmask read(w) val = 0x%04x\n", ret);
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145 | 6cbf4c8c | Cam Macdonell | |
146 | 6cbf4c8c | Cam Macdonell | return ret;
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147 | 6cbf4c8c | Cam Macdonell | } |
148 | 6cbf4c8c | Cam Macdonell | |
149 | 6cbf4c8c | Cam Macdonell | static void ivshmem_IntrStatus_write(IVShmemState *s, uint32_t val) |
150 | 6cbf4c8c | Cam Macdonell | { |
151 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("IntrStatus write(w) val = 0x%04x\n", val);
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152 | 6cbf4c8c | Cam Macdonell | |
153 | 6cbf4c8c | Cam Macdonell | s->intrstatus = val; |
154 | 6cbf4c8c | Cam Macdonell | |
155 | 6cbf4c8c | Cam Macdonell | ivshmem_update_irq(s, val); |
156 | 6cbf4c8c | Cam Macdonell | return;
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157 | 6cbf4c8c | Cam Macdonell | } |
158 | 6cbf4c8c | Cam Macdonell | |
159 | 6cbf4c8c | Cam Macdonell | static uint32_t ivshmem_IntrStatus_read(IVShmemState *s)
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160 | 6cbf4c8c | Cam Macdonell | { |
161 | 6cbf4c8c | Cam Macdonell | uint32_t ret = s->intrstatus; |
162 | 6cbf4c8c | Cam Macdonell | |
163 | 6cbf4c8c | Cam Macdonell | /* reading ISR clears all interrupts */
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164 | 6cbf4c8c | Cam Macdonell | s->intrstatus = 0;
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165 | 6cbf4c8c | Cam Macdonell | |
166 | 6cbf4c8c | Cam Macdonell | ivshmem_update_irq(s, 0);
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167 | 6cbf4c8c | Cam Macdonell | |
168 | 6cbf4c8c | Cam Macdonell | return ret;
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169 | 6cbf4c8c | Cam Macdonell | } |
170 | 6cbf4c8c | Cam Macdonell | |
171 | 6cbf4c8c | Cam Macdonell | static void ivshmem_io_writew(void *opaque, target_phys_addr_t addr, |
172 | 6cbf4c8c | Cam Macdonell | uint32_t val) |
173 | 6cbf4c8c | Cam Macdonell | { |
174 | 6cbf4c8c | Cam Macdonell | |
175 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("We shouldn't be writing words\n");
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176 | 6cbf4c8c | Cam Macdonell | } |
177 | 6cbf4c8c | Cam Macdonell | |
178 | 6cbf4c8c | Cam Macdonell | static void ivshmem_io_writel(void *opaque, target_phys_addr_t addr, |
179 | 6cbf4c8c | Cam Macdonell | uint32_t val) |
180 | 6cbf4c8c | Cam Macdonell | { |
181 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = opaque; |
182 | 6cbf4c8c | Cam Macdonell | |
183 | 6cbf4c8c | Cam Macdonell | uint64_t write_one = 1;
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184 | 6cbf4c8c | Cam Macdonell | uint16_t dest = val >> 16;
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185 | 6cbf4c8c | Cam Macdonell | uint16_t vector = val & 0xff;
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186 | 6cbf4c8c | Cam Macdonell | |
187 | 6cbf4c8c | Cam Macdonell | addr &= 0xfc;
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188 | 6cbf4c8c | Cam Macdonell | |
189 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("writing to addr " TARGET_FMT_plx "\n", addr); |
190 | 6cbf4c8c | Cam Macdonell | switch (addr)
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191 | 6cbf4c8c | Cam Macdonell | { |
192 | 6cbf4c8c | Cam Macdonell | case INTRMASK:
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193 | 6cbf4c8c | Cam Macdonell | ivshmem_IntrMask_write(s, val); |
194 | 6cbf4c8c | Cam Macdonell | break;
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195 | 6cbf4c8c | Cam Macdonell | |
196 | 6cbf4c8c | Cam Macdonell | case INTRSTATUS:
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197 | 6cbf4c8c | Cam Macdonell | ivshmem_IntrStatus_write(s, val); |
198 | 6cbf4c8c | Cam Macdonell | break;
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199 | 6cbf4c8c | Cam Macdonell | |
200 | 6cbf4c8c | Cam Macdonell | case DOORBELL:
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201 | 6cbf4c8c | Cam Macdonell | /* check that dest VM ID is reasonable */
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202 | 1b27d7a1 | Jes Sorensen | if (dest > s->max_peer) {
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203 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("Invalid destination VM ID (%d)\n", dest);
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204 | 6cbf4c8c | Cam Macdonell | break;
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205 | 6cbf4c8c | Cam Macdonell | } |
206 | 6cbf4c8c | Cam Macdonell | |
207 | 6cbf4c8c | Cam Macdonell | /* check doorbell range */
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208 | 1b27d7a1 | Jes Sorensen | if (vector < s->peers[dest].nb_eventfds) {
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209 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("Writing %" PRId64 " to VM %d on vector %d\n", |
210 | 6cbf4c8c | Cam Macdonell | write_one, dest, vector); |
211 | 6cbf4c8c | Cam Macdonell | if (write(s->peers[dest].eventfds[vector],
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212 | 6cbf4c8c | Cam Macdonell | &(write_one), 8) != 8) { |
213 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("error writing to eventfd\n");
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214 | 6cbf4c8c | Cam Macdonell | } |
215 | 6cbf4c8c | Cam Macdonell | } |
216 | 6cbf4c8c | Cam Macdonell | break;
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217 | 6cbf4c8c | Cam Macdonell | default:
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218 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("Invalid VM Doorbell VM %d\n", dest);
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219 | 6cbf4c8c | Cam Macdonell | } |
220 | 6cbf4c8c | Cam Macdonell | } |
221 | 6cbf4c8c | Cam Macdonell | |
222 | 6cbf4c8c | Cam Macdonell | static void ivshmem_io_writeb(void *opaque, target_phys_addr_t addr, |
223 | 6cbf4c8c | Cam Macdonell | uint32_t val) |
224 | 6cbf4c8c | Cam Macdonell | { |
225 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("We shouldn't be writing bytes\n");
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226 | 6cbf4c8c | Cam Macdonell | } |
227 | 6cbf4c8c | Cam Macdonell | |
228 | 6cbf4c8c | Cam Macdonell | static uint32_t ivshmem_io_readw(void *opaque, target_phys_addr_t addr) |
229 | 6cbf4c8c | Cam Macdonell | { |
230 | 6cbf4c8c | Cam Macdonell | |
231 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("We shouldn't be reading words\n");
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232 | 6cbf4c8c | Cam Macdonell | return 0; |
233 | 6cbf4c8c | Cam Macdonell | } |
234 | 6cbf4c8c | Cam Macdonell | |
235 | 6cbf4c8c | Cam Macdonell | static uint32_t ivshmem_io_readl(void *opaque, target_phys_addr_t addr) |
236 | 6cbf4c8c | Cam Macdonell | { |
237 | 6cbf4c8c | Cam Macdonell | |
238 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = opaque; |
239 | 6cbf4c8c | Cam Macdonell | uint32_t ret; |
240 | 6cbf4c8c | Cam Macdonell | |
241 | 6cbf4c8c | Cam Macdonell | switch (addr)
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242 | 6cbf4c8c | Cam Macdonell | { |
243 | 6cbf4c8c | Cam Macdonell | case INTRMASK:
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244 | 6cbf4c8c | Cam Macdonell | ret = ivshmem_IntrMask_read(s); |
245 | 6cbf4c8c | Cam Macdonell | break;
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246 | 6cbf4c8c | Cam Macdonell | |
247 | 6cbf4c8c | Cam Macdonell | case INTRSTATUS:
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248 | 6cbf4c8c | Cam Macdonell | ret = ivshmem_IntrStatus_read(s); |
249 | 6cbf4c8c | Cam Macdonell | break;
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250 | 6cbf4c8c | Cam Macdonell | |
251 | 6cbf4c8c | Cam Macdonell | case IVPOSITION:
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252 | 6cbf4c8c | Cam Macdonell | /* return my VM ID if the memory is mapped */
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253 | 6cbf4c8c | Cam Macdonell | if (s->shm_fd > 0) { |
254 | 6cbf4c8c | Cam Macdonell | ret = s->vm_id; |
255 | 6cbf4c8c | Cam Macdonell | } else {
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256 | 6cbf4c8c | Cam Macdonell | ret = -1;
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257 | 6cbf4c8c | Cam Macdonell | } |
258 | 6cbf4c8c | Cam Macdonell | break;
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259 | 6cbf4c8c | Cam Macdonell | |
260 | 6cbf4c8c | Cam Macdonell | default:
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261 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("why are we reading " TARGET_FMT_plx "\n", addr); |
262 | 6cbf4c8c | Cam Macdonell | ret = 0;
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263 | 6cbf4c8c | Cam Macdonell | } |
264 | 6cbf4c8c | Cam Macdonell | |
265 | 6cbf4c8c | Cam Macdonell | return ret;
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266 | 6cbf4c8c | Cam Macdonell | } |
267 | 6cbf4c8c | Cam Macdonell | |
268 | 6cbf4c8c | Cam Macdonell | static uint32_t ivshmem_io_readb(void *opaque, target_phys_addr_t addr) |
269 | 6cbf4c8c | Cam Macdonell | { |
270 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("We shouldn't be reading bytes\n");
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271 | 6cbf4c8c | Cam Macdonell | |
272 | 6cbf4c8c | Cam Macdonell | return 0; |
273 | 6cbf4c8c | Cam Macdonell | } |
274 | 6cbf4c8c | Cam Macdonell | |
275 | 6cbf4c8c | Cam Macdonell | static CPUReadMemoryFunc * const ivshmem_mmio_read[3] = { |
276 | 6cbf4c8c | Cam Macdonell | ivshmem_io_readb, |
277 | 6cbf4c8c | Cam Macdonell | ivshmem_io_readw, |
278 | 6cbf4c8c | Cam Macdonell | ivshmem_io_readl, |
279 | 6cbf4c8c | Cam Macdonell | }; |
280 | 6cbf4c8c | Cam Macdonell | |
281 | 6cbf4c8c | Cam Macdonell | static CPUWriteMemoryFunc * const ivshmem_mmio_write[3] = { |
282 | 6cbf4c8c | Cam Macdonell | ivshmem_io_writeb, |
283 | 6cbf4c8c | Cam Macdonell | ivshmem_io_writew, |
284 | 6cbf4c8c | Cam Macdonell | ivshmem_io_writel, |
285 | 6cbf4c8c | Cam Macdonell | }; |
286 | 6cbf4c8c | Cam Macdonell | |
287 | 6cbf4c8c | Cam Macdonell | static void ivshmem_receive(void *opaque, const uint8_t *buf, int size) |
288 | 6cbf4c8c | Cam Macdonell | { |
289 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = opaque; |
290 | 6cbf4c8c | Cam Macdonell | |
291 | 6cbf4c8c | Cam Macdonell | ivshmem_IntrStatus_write(s, *buf); |
292 | 6cbf4c8c | Cam Macdonell | |
293 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("ivshmem_receive 0x%02x\n", *buf);
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294 | 6cbf4c8c | Cam Macdonell | } |
295 | 6cbf4c8c | Cam Macdonell | |
296 | 6cbf4c8c | Cam Macdonell | static int ivshmem_can_receive(void * opaque) |
297 | 6cbf4c8c | Cam Macdonell | { |
298 | 6cbf4c8c | Cam Macdonell | return 8; |
299 | 6cbf4c8c | Cam Macdonell | } |
300 | 6cbf4c8c | Cam Macdonell | |
301 | 6cbf4c8c | Cam Macdonell | static void ivshmem_event(void *opaque, int event) |
302 | 6cbf4c8c | Cam Macdonell | { |
303 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("ivshmem_event %d\n", event);
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304 | 6cbf4c8c | Cam Macdonell | } |
305 | 6cbf4c8c | Cam Macdonell | |
306 | 6cbf4c8c | Cam Macdonell | static void fake_irqfd(void *opaque, const uint8_t *buf, int size) { |
307 | 6cbf4c8c | Cam Macdonell | |
308 | 6cbf4c8c | Cam Macdonell | EventfdEntry *entry = opaque; |
309 | 6cbf4c8c | Cam Macdonell | PCIDevice *pdev = entry->pdev; |
310 | 6cbf4c8c | Cam Macdonell | |
311 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("interrupt on vector %p %d\n", pdev, entry->vector);
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312 | 6cbf4c8c | Cam Macdonell | msix_notify(pdev, entry->vector); |
313 | 6cbf4c8c | Cam Macdonell | } |
314 | 6cbf4c8c | Cam Macdonell | |
315 | 6cbf4c8c | Cam Macdonell | static CharDriverState* create_eventfd_chr_device(void * opaque, int eventfd, |
316 | 6cbf4c8c | Cam Macdonell | int vector)
|
317 | 6cbf4c8c | Cam Macdonell | { |
318 | 6cbf4c8c | Cam Macdonell | /* create a event character device based on the passed eventfd */
|
319 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = opaque; |
320 | 6cbf4c8c | Cam Macdonell | CharDriverState * chr; |
321 | 6cbf4c8c | Cam Macdonell | |
322 | 6cbf4c8c | Cam Macdonell | chr = qemu_chr_open_eventfd(eventfd); |
323 | 6cbf4c8c | Cam Macdonell | |
324 | 6cbf4c8c | Cam Macdonell | if (chr == NULL) { |
325 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "creating eventfd for eventfd %d failed\n", eventfd);
|
326 | 6cbf4c8c | Cam Macdonell | exit(-1);
|
327 | 6cbf4c8c | Cam Macdonell | } |
328 | 6cbf4c8c | Cam Macdonell | |
329 | 6cbf4c8c | Cam Macdonell | /* if MSI is supported we need multiple interrupts */
|
330 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
|
331 | 6cbf4c8c | Cam Macdonell | s->eventfd_table[vector].pdev = &s->dev; |
332 | 6cbf4c8c | Cam Macdonell | s->eventfd_table[vector].vector = vector; |
333 | 6cbf4c8c | Cam Macdonell | |
334 | 6cbf4c8c | Cam Macdonell | qemu_chr_add_handlers(chr, ivshmem_can_receive, fake_irqfd, |
335 | 6cbf4c8c | Cam Macdonell | ivshmem_event, &s->eventfd_table[vector]); |
336 | 6cbf4c8c | Cam Macdonell | } else {
|
337 | 6cbf4c8c | Cam Macdonell | qemu_chr_add_handlers(chr, ivshmem_can_receive, ivshmem_receive, |
338 | 6cbf4c8c | Cam Macdonell | ivshmem_event, s); |
339 | 6cbf4c8c | Cam Macdonell | } |
340 | 6cbf4c8c | Cam Macdonell | |
341 | 6cbf4c8c | Cam Macdonell | return chr;
|
342 | 6cbf4c8c | Cam Macdonell | |
343 | 6cbf4c8c | Cam Macdonell | } |
344 | 6cbf4c8c | Cam Macdonell | |
345 | 6cbf4c8c | Cam Macdonell | static int check_shm_size(IVShmemState *s, int fd) { |
346 | 6cbf4c8c | Cam Macdonell | /* check that the guest isn't going to try and map more memory than the
|
347 | 6cbf4c8c | Cam Macdonell | * the object has allocated return -1 to indicate error */
|
348 | 6cbf4c8c | Cam Macdonell | |
349 | 6cbf4c8c | Cam Macdonell | struct stat buf;
|
350 | 6cbf4c8c | Cam Macdonell | |
351 | 6cbf4c8c | Cam Macdonell | fstat(fd, &buf); |
352 | 6cbf4c8c | Cam Macdonell | |
353 | 6cbf4c8c | Cam Macdonell | if (s->ivshmem_size > buf.st_size) {
|
354 | ad0a4ac1 | Avi Kivity | fprintf(stderr, |
355 | ad0a4ac1 | Avi Kivity | "IVSHMEM ERROR: Requested memory size greater"
|
356 | ad0a4ac1 | Avi Kivity | " than shared object size (%" PRIu64 " > %" PRIu64")\n", |
357 | ad0a4ac1 | Avi Kivity | s->ivshmem_size, (uint64_t)buf.st_size); |
358 | 6cbf4c8c | Cam Macdonell | return -1; |
359 | 6cbf4c8c | Cam Macdonell | } else {
|
360 | 6cbf4c8c | Cam Macdonell | return 0; |
361 | 6cbf4c8c | Cam Macdonell | } |
362 | 6cbf4c8c | Cam Macdonell | } |
363 | 6cbf4c8c | Cam Macdonell | |
364 | 6cbf4c8c | Cam Macdonell | /* create the shared memory BAR when we are not using the server, so we can
|
365 | 6cbf4c8c | Cam Macdonell | * create the BAR and map the memory immediately */
|
366 | 6cbf4c8c | Cam Macdonell | static void create_shared_memory_BAR(IVShmemState *s, int fd) { |
367 | 6cbf4c8c | Cam Macdonell | |
368 | 6cbf4c8c | Cam Macdonell | void * ptr;
|
369 | 6cbf4c8c | Cam Macdonell | |
370 | 6cbf4c8c | Cam Macdonell | s->shm_fd = fd; |
371 | 6cbf4c8c | Cam Macdonell | |
372 | 6cbf4c8c | Cam Macdonell | ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
373 | 6cbf4c8c | Cam Macdonell | |
374 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset = qemu_ram_alloc_from_ptr(&s->dev.qdev, "ivshmem.bar2",
|
375 | 6cbf4c8c | Cam Macdonell | s->ivshmem_size, ptr); |
376 | 6cbf4c8c | Cam Macdonell | |
377 | 6cbf4c8c | Cam Macdonell | /* region for shared memory */
|
378 | 6cbf4c8c | Cam Macdonell | pci_register_bar(&s->dev, 2, s->ivshmem_size,
|
379 | 6cbf4c8c | Cam Macdonell | PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_map); |
380 | 6cbf4c8c | Cam Macdonell | } |
381 | 6cbf4c8c | Cam Macdonell | |
382 | 6cbf4c8c | Cam Macdonell | static void close_guest_eventfds(IVShmemState *s, int posn) |
383 | 6cbf4c8c | Cam Macdonell | { |
384 | 6cbf4c8c | Cam Macdonell | int i, guest_curr_max;
|
385 | 6cbf4c8c | Cam Macdonell | |
386 | 6cbf4c8c | Cam Macdonell | guest_curr_max = s->peers[posn].nb_eventfds; |
387 | 6cbf4c8c | Cam Macdonell | |
388 | 6cbf4c8c | Cam Macdonell | for (i = 0; i < guest_curr_max; i++) { |
389 | 6cbf4c8c | Cam Macdonell | kvm_set_ioeventfd_mmio_long(s->peers[posn].eventfds[i], |
390 | 6cbf4c8c | Cam Macdonell | s->mmio_addr + DOORBELL, (posn << 16) | i, 0); |
391 | 6cbf4c8c | Cam Macdonell | close(s->peers[posn].eventfds[i]); |
392 | 6cbf4c8c | Cam Macdonell | } |
393 | 6cbf4c8c | Cam Macdonell | |
394 | 6cbf4c8c | Cam Macdonell | qemu_free(s->peers[posn].eventfds); |
395 | 6cbf4c8c | Cam Macdonell | s->peers[posn].nb_eventfds = 0;
|
396 | 6cbf4c8c | Cam Macdonell | } |
397 | 6cbf4c8c | Cam Macdonell | |
398 | 6cbf4c8c | Cam Macdonell | static void setup_ioeventfds(IVShmemState *s) { |
399 | 6cbf4c8c | Cam Macdonell | |
400 | 6cbf4c8c | Cam Macdonell | int i, j;
|
401 | 6cbf4c8c | Cam Macdonell | |
402 | 6cbf4c8c | Cam Macdonell | for (i = 0; i <= s->max_peer; i++) { |
403 | 6cbf4c8c | Cam Macdonell | for (j = 0; j < s->peers[i].nb_eventfds; j++) { |
404 | 6cbf4c8c | Cam Macdonell | kvm_set_ioeventfd_mmio_long(s->peers[i].eventfds[j], |
405 | 6cbf4c8c | Cam Macdonell | s->mmio_addr + DOORBELL, (i << 16) | j, 1); |
406 | 6cbf4c8c | Cam Macdonell | } |
407 | 6cbf4c8c | Cam Macdonell | } |
408 | 6cbf4c8c | Cam Macdonell | } |
409 | 6cbf4c8c | Cam Macdonell | |
410 | 6cbf4c8c | Cam Macdonell | /* this function increase the dynamic storage need to store data about other
|
411 | 6cbf4c8c | Cam Macdonell | * guests */
|
412 | 6cbf4c8c | Cam Macdonell | static void increase_dynamic_storage(IVShmemState *s, int new_min_size) { |
413 | 6cbf4c8c | Cam Macdonell | |
414 | 6cbf4c8c | Cam Macdonell | int j, old_nb_alloc;
|
415 | 6cbf4c8c | Cam Macdonell | |
416 | 6cbf4c8c | Cam Macdonell | old_nb_alloc = s->nb_peers; |
417 | 6cbf4c8c | Cam Macdonell | |
418 | 6cbf4c8c | Cam Macdonell | while (new_min_size >= s->nb_peers)
|
419 | 6cbf4c8c | Cam Macdonell | s->nb_peers = s->nb_peers * 2;
|
420 | 6cbf4c8c | Cam Macdonell | |
421 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("bumping storage to %d guests\n", s->nb_peers);
|
422 | 6cbf4c8c | Cam Macdonell | s->peers = qemu_realloc(s->peers, s->nb_peers * sizeof(Peer));
|
423 | 6cbf4c8c | Cam Macdonell | |
424 | 6cbf4c8c | Cam Macdonell | /* zero out new pointers */
|
425 | 6cbf4c8c | Cam Macdonell | for (j = old_nb_alloc; j < s->nb_peers; j++) {
|
426 | 6cbf4c8c | Cam Macdonell | s->peers[j].eventfds = NULL;
|
427 | 6cbf4c8c | Cam Macdonell | s->peers[j].nb_eventfds = 0;
|
428 | 6cbf4c8c | Cam Macdonell | } |
429 | 6cbf4c8c | Cam Macdonell | } |
430 | 6cbf4c8c | Cam Macdonell | |
431 | 6cbf4c8c | Cam Macdonell | static void ivshmem_read(void *opaque, const uint8_t * buf, int flags) |
432 | 6cbf4c8c | Cam Macdonell | { |
433 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = opaque; |
434 | 6cbf4c8c | Cam Macdonell | int incoming_fd, tmp_fd;
|
435 | 6cbf4c8c | Cam Macdonell | int guest_max_eventfd;
|
436 | 6cbf4c8c | Cam Macdonell | long incoming_posn;
|
437 | 6cbf4c8c | Cam Macdonell | |
438 | 6cbf4c8c | Cam Macdonell | memcpy(&incoming_posn, buf, sizeof(long)); |
439 | 6cbf4c8c | Cam Macdonell | /* pick off s->server_chr->msgfd and store it, posn should accompany msg */
|
440 | 6cbf4c8c | Cam Macdonell | tmp_fd = qemu_chr_get_msgfd(s->server_chr); |
441 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("posn is %ld, fd is %d\n", incoming_posn, tmp_fd);
|
442 | 6cbf4c8c | Cam Macdonell | |
443 | 6cbf4c8c | Cam Macdonell | /* make sure we have enough space for this guest */
|
444 | 6cbf4c8c | Cam Macdonell | if (incoming_posn >= s->nb_peers) {
|
445 | 6cbf4c8c | Cam Macdonell | increase_dynamic_storage(s, incoming_posn); |
446 | 6cbf4c8c | Cam Macdonell | } |
447 | 6cbf4c8c | Cam Macdonell | |
448 | 6cbf4c8c | Cam Macdonell | if (tmp_fd == -1) { |
449 | 6cbf4c8c | Cam Macdonell | /* if posn is positive and unseen before then this is our posn*/
|
450 | 6cbf4c8c | Cam Macdonell | if ((incoming_posn >= 0) && |
451 | 6cbf4c8c | Cam Macdonell | (s->peers[incoming_posn].eventfds == NULL)) {
|
452 | 6cbf4c8c | Cam Macdonell | /* receive our posn */
|
453 | 6cbf4c8c | Cam Macdonell | s->vm_id = incoming_posn; |
454 | 6cbf4c8c | Cam Macdonell | return;
|
455 | 6cbf4c8c | Cam Macdonell | } else {
|
456 | 6cbf4c8c | Cam Macdonell | /* otherwise an fd == -1 means an existing guest has gone away */
|
457 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("posn %ld has gone away\n", incoming_posn);
|
458 | 6cbf4c8c | Cam Macdonell | close_guest_eventfds(s, incoming_posn); |
459 | 6cbf4c8c | Cam Macdonell | return;
|
460 | 6cbf4c8c | Cam Macdonell | } |
461 | 6cbf4c8c | Cam Macdonell | } |
462 | 6cbf4c8c | Cam Macdonell | |
463 | 6cbf4c8c | Cam Macdonell | /* because of the implementation of get_msgfd, we need a dup */
|
464 | 6cbf4c8c | Cam Macdonell | incoming_fd = dup(tmp_fd); |
465 | 6cbf4c8c | Cam Macdonell | |
466 | 6cbf4c8c | Cam Macdonell | if (incoming_fd == -1) { |
467 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "could not allocate file descriptor %s\n",
|
468 | 6cbf4c8c | Cam Macdonell | strerror(errno)); |
469 | 6cbf4c8c | Cam Macdonell | return;
|
470 | 6cbf4c8c | Cam Macdonell | } |
471 | 6cbf4c8c | Cam Macdonell | |
472 | 6cbf4c8c | Cam Macdonell | /* if the position is -1, then it's shared memory region fd */
|
473 | 6cbf4c8c | Cam Macdonell | if (incoming_posn == -1) { |
474 | 6cbf4c8c | Cam Macdonell | |
475 | 6cbf4c8c | Cam Macdonell | void * map_ptr;
|
476 | 6cbf4c8c | Cam Macdonell | |
477 | 6cbf4c8c | Cam Macdonell | s->max_peer = 0;
|
478 | 6cbf4c8c | Cam Macdonell | |
479 | 6cbf4c8c | Cam Macdonell | if (check_shm_size(s, incoming_fd) == -1) { |
480 | 6cbf4c8c | Cam Macdonell | exit(-1);
|
481 | 6cbf4c8c | Cam Macdonell | } |
482 | 6cbf4c8c | Cam Macdonell | |
483 | 6cbf4c8c | Cam Macdonell | /* mmap the region and map into the BAR2 */
|
484 | 6cbf4c8c | Cam Macdonell | map_ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED,
|
485 | 6cbf4c8c | Cam Macdonell | incoming_fd, 0);
|
486 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset = qemu_ram_alloc_from_ptr(&s->dev.qdev, |
487 | 6cbf4c8c | Cam Macdonell | "ivshmem.bar2", s->ivshmem_size, map_ptr);
|
488 | 6cbf4c8c | Cam Macdonell | |
489 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("guest pci addr = %" FMT_PCIBUS ", guest h/w addr = %" |
490 | 6cbf4c8c | Cam Macdonell | PRIu64 ", size = %" PRIu64 "\n", s->shm_pci_addr, |
491 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset, s->ivshmem_size); |
492 | 6cbf4c8c | Cam Macdonell | |
493 | 6cbf4c8c | Cam Macdonell | if (s->shm_pci_addr > 0) { |
494 | 6cbf4c8c | Cam Macdonell | /* map memory into BAR2 */
|
495 | 6cbf4c8c | Cam Macdonell | cpu_register_physical_memory(s->shm_pci_addr, s->ivshmem_size, |
496 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset); |
497 | 6cbf4c8c | Cam Macdonell | } |
498 | 6cbf4c8c | Cam Macdonell | |
499 | 6cbf4c8c | Cam Macdonell | /* only store the fd if it is successfully mapped */
|
500 | 6cbf4c8c | Cam Macdonell | s->shm_fd = incoming_fd; |
501 | 6cbf4c8c | Cam Macdonell | |
502 | 6cbf4c8c | Cam Macdonell | return;
|
503 | 6cbf4c8c | Cam Macdonell | } |
504 | 6cbf4c8c | Cam Macdonell | |
505 | 6cbf4c8c | Cam Macdonell | /* each guest has an array of eventfds, and we keep track of how many
|
506 | 6cbf4c8c | Cam Macdonell | * guests for each VM */
|
507 | 6cbf4c8c | Cam Macdonell | guest_max_eventfd = s->peers[incoming_posn].nb_eventfds; |
508 | 6cbf4c8c | Cam Macdonell | |
509 | 6cbf4c8c | Cam Macdonell | if (guest_max_eventfd == 0) { |
510 | 6cbf4c8c | Cam Macdonell | /* one eventfd per MSI vector */
|
511 | 6cbf4c8c | Cam Macdonell | s->peers[incoming_posn].eventfds = (int *) qemu_malloc(s->vectors *
|
512 | 6cbf4c8c | Cam Macdonell | sizeof(int)); |
513 | 6cbf4c8c | Cam Macdonell | } |
514 | 6cbf4c8c | Cam Macdonell | |
515 | 6cbf4c8c | Cam Macdonell | /* this is an eventfd for a particular guest VM */
|
516 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("eventfds[%ld][%d] = %d\n", incoming_posn,
|
517 | 6cbf4c8c | Cam Macdonell | guest_max_eventfd, incoming_fd); |
518 | 6cbf4c8c | Cam Macdonell | s->peers[incoming_posn].eventfds[guest_max_eventfd] = incoming_fd; |
519 | 6cbf4c8c | Cam Macdonell | |
520 | 6cbf4c8c | Cam Macdonell | /* increment count for particular guest */
|
521 | 6cbf4c8c | Cam Macdonell | s->peers[incoming_posn].nb_eventfds++; |
522 | 6cbf4c8c | Cam Macdonell | |
523 | 6cbf4c8c | Cam Macdonell | /* keep track of the maximum VM ID */
|
524 | 6cbf4c8c | Cam Macdonell | if (incoming_posn > s->max_peer) {
|
525 | 6cbf4c8c | Cam Macdonell | s->max_peer = incoming_posn; |
526 | 6cbf4c8c | Cam Macdonell | } |
527 | 6cbf4c8c | Cam Macdonell | |
528 | 6cbf4c8c | Cam Macdonell | if (incoming_posn == s->vm_id) {
|
529 | 6cbf4c8c | Cam Macdonell | s->eventfd_chr[guest_max_eventfd] = create_eventfd_chr_device(s, |
530 | 6cbf4c8c | Cam Macdonell | s->peers[s->vm_id].eventfds[guest_max_eventfd], |
531 | 6cbf4c8c | Cam Macdonell | guest_max_eventfd); |
532 | 6cbf4c8c | Cam Macdonell | } |
533 | 6cbf4c8c | Cam Macdonell | |
534 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD)) {
|
535 | 6cbf4c8c | Cam Macdonell | if (kvm_set_ioeventfd_mmio_long(incoming_fd, s->mmio_addr + DOORBELL,
|
536 | 6cbf4c8c | Cam Macdonell | (incoming_posn << 16) | guest_max_eventfd, 1) < 0) { |
537 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: ioeventfd not available\n");
|
538 | 6cbf4c8c | Cam Macdonell | } |
539 | 6cbf4c8c | Cam Macdonell | } |
540 | 6cbf4c8c | Cam Macdonell | |
541 | 6cbf4c8c | Cam Macdonell | return;
|
542 | 6cbf4c8c | Cam Macdonell | } |
543 | 6cbf4c8c | Cam Macdonell | |
544 | 6cbf4c8c | Cam Macdonell | static void ivshmem_reset(DeviceState *d) |
545 | 6cbf4c8c | Cam Macdonell | { |
546 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = DO_UPCAST(IVShmemState, dev.qdev, d); |
547 | 6cbf4c8c | Cam Macdonell | |
548 | 6cbf4c8c | Cam Macdonell | s->intrstatus = 0;
|
549 | 6cbf4c8c | Cam Macdonell | return;
|
550 | 6cbf4c8c | Cam Macdonell | } |
551 | 6cbf4c8c | Cam Macdonell | |
552 | 6cbf4c8c | Cam Macdonell | static void ivshmem_mmio_map(PCIDevice *pci_dev, int region_num, |
553 | 6cbf4c8c | Cam Macdonell | pcibus_t addr, pcibus_t size, int type)
|
554 | 6cbf4c8c | Cam Macdonell | { |
555 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = DO_UPCAST(IVShmemState, dev, pci_dev); |
556 | 6cbf4c8c | Cam Macdonell | |
557 | 6cbf4c8c | Cam Macdonell | s->mmio_addr = addr; |
558 | 6cbf4c8c | Cam Macdonell | cpu_register_physical_memory(addr + 0, IVSHMEM_REG_BAR_SIZE,
|
559 | 6cbf4c8c | Cam Macdonell | s->ivshmem_mmio_io_addr); |
560 | 6cbf4c8c | Cam Macdonell | |
561 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD)) {
|
562 | 6cbf4c8c | Cam Macdonell | setup_ioeventfds(s); |
563 | 6cbf4c8c | Cam Macdonell | } |
564 | 6cbf4c8c | Cam Macdonell | } |
565 | 6cbf4c8c | Cam Macdonell | |
566 | 6cbf4c8c | Cam Macdonell | static uint64_t ivshmem_get_size(IVShmemState * s) {
|
567 | 6cbf4c8c | Cam Macdonell | |
568 | 6cbf4c8c | Cam Macdonell | uint64_t value; |
569 | 6cbf4c8c | Cam Macdonell | char *ptr;
|
570 | 6cbf4c8c | Cam Macdonell | |
571 | 6cbf4c8c | Cam Macdonell | value = strtoull(s->sizearg, &ptr, 10);
|
572 | 6cbf4c8c | Cam Macdonell | switch (*ptr) {
|
573 | 6cbf4c8c | Cam Macdonell | case 0: case 'M': case 'm': |
574 | 6cbf4c8c | Cam Macdonell | value <<= 20;
|
575 | 6cbf4c8c | Cam Macdonell | break;
|
576 | 6cbf4c8c | Cam Macdonell | case 'G': case 'g': |
577 | 6cbf4c8c | Cam Macdonell | value <<= 30;
|
578 | 6cbf4c8c | Cam Macdonell | break;
|
579 | 6cbf4c8c | Cam Macdonell | default:
|
580 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "qemu: invalid ram size: %s\n", s->sizearg);
|
581 | 6cbf4c8c | Cam Macdonell | exit(1);
|
582 | 6cbf4c8c | Cam Macdonell | } |
583 | 6cbf4c8c | Cam Macdonell | |
584 | 6cbf4c8c | Cam Macdonell | /* BARs must be a power of 2 */
|
585 | 6cbf4c8c | Cam Macdonell | if (!is_power_of_two(value)) {
|
586 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: size must be power of 2\n");
|
587 | 6cbf4c8c | Cam Macdonell | exit(1);
|
588 | 6cbf4c8c | Cam Macdonell | } |
589 | 6cbf4c8c | Cam Macdonell | |
590 | 6cbf4c8c | Cam Macdonell | return value;
|
591 | 6cbf4c8c | Cam Macdonell | } |
592 | 6cbf4c8c | Cam Macdonell | |
593 | 6cbf4c8c | Cam Macdonell | static void ivshmem_setup_msi(IVShmemState * s) { |
594 | 6cbf4c8c | Cam Macdonell | |
595 | 6cbf4c8c | Cam Macdonell | int i;
|
596 | 6cbf4c8c | Cam Macdonell | |
597 | 6cbf4c8c | Cam Macdonell | /* allocate the MSI-X vectors */
|
598 | 6cbf4c8c | Cam Macdonell | |
599 | 6cbf4c8c | Cam Macdonell | if (!msix_init(&s->dev, s->vectors, 1, 0)) { |
600 | 6cbf4c8c | Cam Macdonell | pci_register_bar(&s->dev, 1,
|
601 | 6cbf4c8c | Cam Macdonell | msix_bar_size(&s->dev), |
602 | 6cbf4c8c | Cam Macdonell | PCI_BASE_ADDRESS_SPACE_MEMORY, |
603 | 6cbf4c8c | Cam Macdonell | msix_mmio_map); |
604 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s->vectors);
|
605 | 6cbf4c8c | Cam Macdonell | } else {
|
606 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("msix initialization failed\n");
|
607 | 6cbf4c8c | Cam Macdonell | exit(1);
|
608 | 6cbf4c8c | Cam Macdonell | } |
609 | 6cbf4c8c | Cam Macdonell | |
610 | 6cbf4c8c | Cam Macdonell | /* 'activate' the vectors */
|
611 | 6cbf4c8c | Cam Macdonell | for (i = 0; i < s->vectors; i++) { |
612 | 6cbf4c8c | Cam Macdonell | msix_vector_use(&s->dev, i); |
613 | 6cbf4c8c | Cam Macdonell | } |
614 | 6cbf4c8c | Cam Macdonell | |
615 | 6cbf4c8c | Cam Macdonell | /* allocate Qemu char devices for receiving interrupts */
|
616 | 6cbf4c8c | Cam Macdonell | s->eventfd_table = qemu_mallocz(s->vectors * sizeof(EventfdEntry));
|
617 | 6cbf4c8c | Cam Macdonell | } |
618 | 6cbf4c8c | Cam Macdonell | |
619 | 6cbf4c8c | Cam Macdonell | static void ivshmem_save(QEMUFile* f, void *opaque) |
620 | 6cbf4c8c | Cam Macdonell | { |
621 | 6cbf4c8c | Cam Macdonell | IVShmemState *proxy = opaque; |
622 | 6cbf4c8c | Cam Macdonell | |
623 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("ivshmem_save\n");
|
624 | 6cbf4c8c | Cam Macdonell | pci_device_save(&proxy->dev, f); |
625 | 6cbf4c8c | Cam Macdonell | |
626 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(proxy, IVSHMEM_MSI)) {
|
627 | 6cbf4c8c | Cam Macdonell | msix_save(&proxy->dev, f); |
628 | 6cbf4c8c | Cam Macdonell | } else {
|
629 | 6cbf4c8c | Cam Macdonell | qemu_put_be32(f, proxy->intrstatus); |
630 | 6cbf4c8c | Cam Macdonell | qemu_put_be32(f, proxy->intrmask); |
631 | 6cbf4c8c | Cam Macdonell | } |
632 | 6cbf4c8c | Cam Macdonell | |
633 | 6cbf4c8c | Cam Macdonell | } |
634 | 6cbf4c8c | Cam Macdonell | |
635 | 6cbf4c8c | Cam Macdonell | static int ivshmem_load(QEMUFile* f, void *opaque, int version_id) |
636 | 6cbf4c8c | Cam Macdonell | { |
637 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("ivshmem_load\n");
|
638 | 6cbf4c8c | Cam Macdonell | |
639 | 6cbf4c8c | Cam Macdonell | IVShmemState *proxy = opaque; |
640 | 6cbf4c8c | Cam Macdonell | int ret, i;
|
641 | 6cbf4c8c | Cam Macdonell | |
642 | 6cbf4c8c | Cam Macdonell | if (version_id > 0) { |
643 | 6cbf4c8c | Cam Macdonell | return -EINVAL;
|
644 | 6cbf4c8c | Cam Macdonell | } |
645 | 6cbf4c8c | Cam Macdonell | |
646 | 6cbf4c8c | Cam Macdonell | if (proxy->role_val == IVSHMEM_PEER) {
|
647 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: 'peer' devices are not migratable\n");
|
648 | 6cbf4c8c | Cam Macdonell | return -EINVAL;
|
649 | 6cbf4c8c | Cam Macdonell | } |
650 | 6cbf4c8c | Cam Macdonell | |
651 | 6cbf4c8c | Cam Macdonell | ret = pci_device_load(&proxy->dev, f); |
652 | 6cbf4c8c | Cam Macdonell | if (ret) {
|
653 | 6cbf4c8c | Cam Macdonell | return ret;
|
654 | 6cbf4c8c | Cam Macdonell | } |
655 | 6cbf4c8c | Cam Macdonell | |
656 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(proxy, IVSHMEM_MSI)) {
|
657 | 6cbf4c8c | Cam Macdonell | msix_load(&proxy->dev, f); |
658 | 6cbf4c8c | Cam Macdonell | for (i = 0; i < proxy->vectors; i++) { |
659 | 6cbf4c8c | Cam Macdonell | msix_vector_use(&proxy->dev, i); |
660 | 6cbf4c8c | Cam Macdonell | } |
661 | 6cbf4c8c | Cam Macdonell | } else {
|
662 | 6cbf4c8c | Cam Macdonell | proxy->intrstatus = qemu_get_be32(f); |
663 | 6cbf4c8c | Cam Macdonell | proxy->intrmask = qemu_get_be32(f); |
664 | 6cbf4c8c | Cam Macdonell | } |
665 | 6cbf4c8c | Cam Macdonell | |
666 | 6cbf4c8c | Cam Macdonell | return 0; |
667 | 6cbf4c8c | Cam Macdonell | } |
668 | 6cbf4c8c | Cam Macdonell | |
669 | 6cbf4c8c | Cam Macdonell | static int pci_ivshmem_init(PCIDevice *dev) |
670 | 6cbf4c8c | Cam Macdonell | { |
671 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev); |
672 | 6cbf4c8c | Cam Macdonell | uint8_t *pci_conf; |
673 | 6cbf4c8c | Cam Macdonell | |
674 | 6cbf4c8c | Cam Macdonell | if (s->sizearg == NULL) |
675 | 6cbf4c8c | Cam Macdonell | s->ivshmem_size = 4 << 20; /* 4 MB default */ |
676 | 6cbf4c8c | Cam Macdonell | else {
|
677 | 6cbf4c8c | Cam Macdonell | s->ivshmem_size = ivshmem_get_size(s); |
678 | 6cbf4c8c | Cam Macdonell | } |
679 | 6cbf4c8c | Cam Macdonell | |
680 | 6cbf4c8c | Cam Macdonell | register_savevm(&s->dev.qdev, "ivshmem", 0, 0, ivshmem_save, ivshmem_load, |
681 | 6cbf4c8c | Cam Macdonell | dev); |
682 | 6cbf4c8c | Cam Macdonell | |
683 | 6cbf4c8c | Cam Macdonell | /* IRQFD requires MSI */
|
684 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
|
685 | 6cbf4c8c | Cam Macdonell | !ivshmem_has_feature(s, IVSHMEM_MSI)) { |
686 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: ioeventfd/irqfd requires MSI\n");
|
687 | 6cbf4c8c | Cam Macdonell | exit(1);
|
688 | 6cbf4c8c | Cam Macdonell | } |
689 | 6cbf4c8c | Cam Macdonell | |
690 | 6cbf4c8c | Cam Macdonell | /* check that role is reasonable */
|
691 | 6cbf4c8c | Cam Macdonell | if (s->role) {
|
692 | 6cbf4c8c | Cam Macdonell | if (strncmp(s->role, "peer", 5) == 0) { |
693 | 6cbf4c8c | Cam Macdonell | s->role_val = IVSHMEM_PEER; |
694 | 6cbf4c8c | Cam Macdonell | } else if (strncmp(s->role, "master", 7) == 0) { |
695 | 6cbf4c8c | Cam Macdonell | s->role_val = IVSHMEM_MASTER; |
696 | 6cbf4c8c | Cam Macdonell | } else {
|
697 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: 'role' must be 'peer' or 'master'\n");
|
698 | 6cbf4c8c | Cam Macdonell | exit(1);
|
699 | 6cbf4c8c | Cam Macdonell | } |
700 | 6cbf4c8c | Cam Macdonell | } else {
|
701 | 6cbf4c8c | Cam Macdonell | s->role_val = IVSHMEM_MASTER; /* default */
|
702 | 6cbf4c8c | Cam Macdonell | } |
703 | 6cbf4c8c | Cam Macdonell | |
704 | 6cbf4c8c | Cam Macdonell | if (s->role_val == IVSHMEM_PEER) {
|
705 | 6cbf4c8c | Cam Macdonell | register_device_unmigratable(&s->dev.qdev, "ivshmem", s);
|
706 | 6cbf4c8c | Cam Macdonell | } |
707 | 6cbf4c8c | Cam Macdonell | |
708 | 6cbf4c8c | Cam Macdonell | pci_conf = s->dev.config; |
709 | 6cbf4c8c | Cam Macdonell | pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REDHAT_QUMRANET); |
710 | 6cbf4c8c | Cam Macdonell | pci_conf[0x02] = 0x10; |
711 | 6cbf4c8c | Cam Macdonell | pci_conf[0x03] = 0x11; |
712 | 6cbf4c8c | Cam Macdonell | pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY; |
713 | 6cbf4c8c | Cam Macdonell | pci_config_set_class(pci_conf, PCI_CLASS_MEMORY_RAM); |
714 | 6cbf4c8c | Cam Macdonell | pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; |
715 | 6cbf4c8c | Cam Macdonell | |
716 | 6cbf4c8c | Cam Macdonell | pci_config_set_interrupt_pin(pci_conf, 1);
|
717 | 6cbf4c8c | Cam Macdonell | |
718 | 6cbf4c8c | Cam Macdonell | s->shm_pci_addr = 0;
|
719 | 6cbf4c8c | Cam Macdonell | s->ivshmem_offset = 0;
|
720 | 6cbf4c8c | Cam Macdonell | s->shm_fd = 0;
|
721 | 6cbf4c8c | Cam Macdonell | |
722 | 6cbf4c8c | Cam Macdonell | s->ivshmem_mmio_io_addr = cpu_register_io_memory(ivshmem_mmio_read, |
723 | 6cbf4c8c | Cam Macdonell | ivshmem_mmio_write, s); |
724 | 6cbf4c8c | Cam Macdonell | /* region for registers*/
|
725 | 6cbf4c8c | Cam Macdonell | pci_register_bar(&s->dev, 0, IVSHMEM_REG_BAR_SIZE,
|
726 | 6cbf4c8c | Cam Macdonell | PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_mmio_map); |
727 | 6cbf4c8c | Cam Macdonell | |
728 | 6cbf4c8c | Cam Macdonell | if ((s->server_chr != NULL) && |
729 | 6cbf4c8c | Cam Macdonell | (strncmp(s->server_chr->filename, "unix:", 5) == 0)) { |
730 | 6cbf4c8c | Cam Macdonell | /* if we get a UNIX socket as the parameter we will talk
|
731 | 6cbf4c8c | Cam Macdonell | * to the ivshmem server to receive the memory region */
|
732 | 6cbf4c8c | Cam Macdonell | |
733 | 6cbf4c8c | Cam Macdonell | if (s->shmobj != NULL) { |
734 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "WARNING: do not specify both 'chardev' "
|
735 | 6cbf4c8c | Cam Macdonell | "and 'shm' with ivshmem\n");
|
736 | 6cbf4c8c | Cam Macdonell | } |
737 | 6cbf4c8c | Cam Macdonell | |
738 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
|
739 | 6cbf4c8c | Cam Macdonell | s->server_chr->filename); |
740 | 6cbf4c8c | Cam Macdonell | |
741 | 6cbf4c8c | Cam Macdonell | if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
|
742 | 6cbf4c8c | Cam Macdonell | ivshmem_setup_msi(s); |
743 | 6cbf4c8c | Cam Macdonell | } |
744 | 6cbf4c8c | Cam Macdonell | |
745 | 6cbf4c8c | Cam Macdonell | /* we allocate enough space for 16 guests and grow as needed */
|
746 | 6cbf4c8c | Cam Macdonell | s->nb_peers = 16;
|
747 | 6cbf4c8c | Cam Macdonell | s->vm_id = -1;
|
748 | 6cbf4c8c | Cam Macdonell | |
749 | 6cbf4c8c | Cam Macdonell | /* allocate/initialize space for interrupt handling */
|
750 | 6cbf4c8c | Cam Macdonell | s->peers = qemu_mallocz(s->nb_peers * sizeof(Peer));
|
751 | 6cbf4c8c | Cam Macdonell | |
752 | 6cbf4c8c | Cam Macdonell | pci_register_bar(&s->dev, 2, s->ivshmem_size,
|
753 | 6cbf4c8c | Cam Macdonell | PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_map); |
754 | 6cbf4c8c | Cam Macdonell | |
755 | 6cbf4c8c | Cam Macdonell | s->eventfd_chr = qemu_mallocz(s->vectors * sizeof(CharDriverState *));
|
756 | 6cbf4c8c | Cam Macdonell | |
757 | 6cbf4c8c | Cam Macdonell | qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive, ivshmem_read, |
758 | 6cbf4c8c | Cam Macdonell | ivshmem_event, s); |
759 | 6cbf4c8c | Cam Macdonell | } else {
|
760 | 6cbf4c8c | Cam Macdonell | /* just map the file immediately, we're not using a server */
|
761 | 6cbf4c8c | Cam Macdonell | int fd;
|
762 | 6cbf4c8c | Cam Macdonell | |
763 | 6cbf4c8c | Cam Macdonell | if (s->shmobj == NULL) { |
764 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "Must specify 'chardev' or 'shm' to ivshmem\n");
|
765 | 6cbf4c8c | Cam Macdonell | } |
766 | 6cbf4c8c | Cam Macdonell | |
767 | 6cbf4c8c | Cam Macdonell | IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
|
768 | 6cbf4c8c | Cam Macdonell | |
769 | 6cbf4c8c | Cam Macdonell | /* try opening with O_EXCL and if it succeeds zero the memory
|
770 | 6cbf4c8c | Cam Macdonell | * by truncating to 0 */
|
771 | 6cbf4c8c | Cam Macdonell | if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR|O_EXCL,
|
772 | 6cbf4c8c | Cam Macdonell | S_IRWXU|S_IRWXG|S_IRWXO)) > 0) {
|
773 | 6cbf4c8c | Cam Macdonell | /* truncate file to length PCI device's memory */
|
774 | 6cbf4c8c | Cam Macdonell | if (ftruncate(fd, s->ivshmem_size) != 0) { |
775 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: could not truncate shared file\n");
|
776 | 6cbf4c8c | Cam Macdonell | } |
777 | 6cbf4c8c | Cam Macdonell | |
778 | 6cbf4c8c | Cam Macdonell | } else if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR, |
779 | 6cbf4c8c | Cam Macdonell | S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
|
780 | 6cbf4c8c | Cam Macdonell | fprintf(stderr, "ivshmem: could not open shared file\n");
|
781 | 6cbf4c8c | Cam Macdonell | exit(-1);
|
782 | 6cbf4c8c | Cam Macdonell | |
783 | 6cbf4c8c | Cam Macdonell | } |
784 | 6cbf4c8c | Cam Macdonell | |
785 | 6cbf4c8c | Cam Macdonell | if (check_shm_size(s, fd) == -1) { |
786 | 6cbf4c8c | Cam Macdonell | exit(-1);
|
787 | 6cbf4c8c | Cam Macdonell | } |
788 | 6cbf4c8c | Cam Macdonell | |
789 | 6cbf4c8c | Cam Macdonell | create_shared_memory_BAR(s, fd); |
790 | 6cbf4c8c | Cam Macdonell | |
791 | 6cbf4c8c | Cam Macdonell | } |
792 | 6cbf4c8c | Cam Macdonell | |
793 | 6cbf4c8c | Cam Macdonell | return 0; |
794 | 6cbf4c8c | Cam Macdonell | } |
795 | 6cbf4c8c | Cam Macdonell | |
796 | 6cbf4c8c | Cam Macdonell | static int pci_ivshmem_uninit(PCIDevice *dev) |
797 | 6cbf4c8c | Cam Macdonell | { |
798 | 6cbf4c8c | Cam Macdonell | IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev); |
799 | 6cbf4c8c | Cam Macdonell | |
800 | 6cbf4c8c | Cam Macdonell | cpu_unregister_io_memory(s->ivshmem_mmio_io_addr); |
801 | 6cbf4c8c | Cam Macdonell | unregister_savevm(&dev->qdev, "ivshmem", s);
|
802 | 6cbf4c8c | Cam Macdonell | |
803 | 6cbf4c8c | Cam Macdonell | return 0; |
804 | 6cbf4c8c | Cam Macdonell | } |
805 | 6cbf4c8c | Cam Macdonell | |
806 | 6cbf4c8c | Cam Macdonell | static PCIDeviceInfo ivshmem_info = {
|
807 | 6cbf4c8c | Cam Macdonell | .qdev.name = "ivshmem",
|
808 | 6cbf4c8c | Cam Macdonell | .qdev.size = sizeof(IVShmemState),
|
809 | 6cbf4c8c | Cam Macdonell | .qdev.reset = ivshmem_reset, |
810 | 6cbf4c8c | Cam Macdonell | .init = pci_ivshmem_init, |
811 | 6cbf4c8c | Cam Macdonell | .exit = pci_ivshmem_uninit, |
812 | 6cbf4c8c | Cam Macdonell | .qdev.props = (Property[]) { |
813 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_CHR("chardev", IVShmemState, server_chr),
|
814 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_STRING("size", IVShmemState, sizearg),
|
815 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_UINT32("vectors", IVShmemState, vectors, 1), |
816 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_BIT("ioeventfd", IVShmemState, features, IVSHMEM_IOEVENTFD, false), |
817 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_BIT("msi", IVShmemState, features, IVSHMEM_MSI, true), |
818 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_STRING("shm", IVShmemState, shmobj),
|
819 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_STRING("role", IVShmemState, role),
|
820 | 6cbf4c8c | Cam Macdonell | DEFINE_PROP_END_OF_LIST(), |
821 | 6cbf4c8c | Cam Macdonell | } |
822 | 6cbf4c8c | Cam Macdonell | }; |
823 | 6cbf4c8c | Cam Macdonell | |
824 | 6cbf4c8c | Cam Macdonell | static void ivshmem_register_devices(void) |
825 | 6cbf4c8c | Cam Macdonell | { |
826 | 6cbf4c8c | Cam Macdonell | pci_qdev_register(&ivshmem_info); |
827 | 6cbf4c8c | Cam Macdonell | } |
828 | 6cbf4c8c | Cam Macdonell | |
829 | 6cbf4c8c | Cam Macdonell | device_init(ivshmem_register_devices) |