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ad0ebb91 DG |
1 | /* |
2 | * QEMU sPAPR IOMMU (TCE) code | |
3 | * | |
4 | * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
83c9f4ca | 19 | #include "hw/hw.h" |
9c17d615 | 20 | #include "sysemu/kvm.h" |
83c9f4ca | 21 | #include "hw/qdev.h" |
ad0ebb91 | 22 | #include "kvm_ppc.h" |
9c17d615 | 23 | #include "sysemu/dma.h" |
022c62cb | 24 | #include "exec/address-spaces.h" |
7e472264 | 25 | #include "trace.h" |
ad0ebb91 | 26 | |
0d09e41a | 27 | #include "hw/ppc/spapr.h" |
ad0ebb91 DG |
28 | |
29 | #include <libfdt.h> | |
30 | ||
ad0ebb91 DG |
31 | enum sPAPRTCEAccess { |
32 | SPAPR_TCE_FAULT = 0, | |
33 | SPAPR_TCE_RO = 1, | |
34 | SPAPR_TCE_WO = 2, | |
35 | SPAPR_TCE_RW = 3, | |
36 | }; | |
37 | ||
6a0a70b0 | 38 | static QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables; |
ad0ebb91 DG |
39 | |
40 | static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn) | |
41 | { | |
42 | sPAPRTCETable *tcet; | |
43 | ||
d4261662 DG |
44 | if (liobn & 0xFFFFFFFF00000000ULL) { |
45 | hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n", | |
46 | liobn); | |
47 | return NULL; | |
48 | } | |
49 | ||
ad0ebb91 DG |
50 | QLIST_FOREACH(tcet, &spapr_tce_tables, list) { |
51 | if (tcet->liobn == liobn) { | |
52 | return tcet; | |
53 | } | |
54 | } | |
55 | ||
56 | return NULL; | |
57 | } | |
58 | ||
a84bb436 | 59 | static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr) |
ad0ebb91 | 60 | { |
a84bb436 | 61 | sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu); |
ad0ebb91 | 62 | uint64_t tce; |
7e472264 AK |
63 | IOMMUTLBEntry ret = { |
64 | .target_as = &address_space_memory, | |
65 | .iova = 0, | |
66 | .translated_addr = 0, | |
67 | .addr_mask = ~(hwaddr)0, | |
68 | .perm = IOMMU_NONE, | |
69 | }; | |
ad0ebb91 | 70 | |
53724ee5 | 71 | if (tcet->bypass) { |
7e472264 AK |
72 | ret.perm = IOMMU_RW; |
73 | } else if (addr < tcet->window_size) { | |
74 | /* Check if we are in bound */ | |
75 | tce = tcet->table[addr >> SPAPR_TCE_PAGE_SHIFT]; | |
76 | ret.iova = addr & ~SPAPR_TCE_PAGE_MASK; | |
77 | ret.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK; | |
78 | ret.addr_mask = SPAPR_TCE_PAGE_MASK; | |
79 | ret.perm = tce; | |
ad0ebb91 | 80 | } |
7e472264 AK |
81 | trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm, |
82 | ret.addr_mask); | |
ad0ebb91 | 83 | |
7e472264 | 84 | return ret; |
a71bfbfe PB |
85 | } |
86 | ||
a83000f5 AL |
87 | static int spapr_tce_table_pre_load(void *opaque) |
88 | { | |
89 | sPAPRTCETable *tcet = SPAPR_TCE_TABLE(opaque); | |
90 | ||
91 | tcet->nb_table = tcet->window_size >> SPAPR_TCE_PAGE_SHIFT; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static const VMStateDescription vmstate_spapr_tce_table = { | |
97 | .name = "spapr_iommu", | |
98 | .version_id = 1, | |
99 | .minimum_version_id = 1, | |
a83000f5 | 100 | .pre_load = spapr_tce_table_pre_load, |
3aff6c2f | 101 | .fields = (VMStateField[]) { |
a83000f5 AL |
102 | /* Sanity check */ |
103 | VMSTATE_UINT32_EQUAL(liobn, sPAPRTCETable), | |
104 | VMSTATE_UINT32_EQUAL(window_size, sPAPRTCETable), | |
105 | ||
106 | /* IOMMU state */ | |
107 | VMSTATE_BOOL(bypass, sPAPRTCETable), | |
108 | VMSTATE_VARRAY_UINT32(table, sPAPRTCETable, nb_table, 0, vmstate_info_uint64, uint64_t), | |
109 | ||
110 | VMSTATE_END_OF_LIST() | |
111 | }, | |
112 | }; | |
113 | ||
a84bb436 PB |
114 | static MemoryRegionIOMMUOps spapr_iommu_ops = { |
115 | .translate = spapr_tce_translate_iommu, | |
116 | }; | |
ad0ebb91 | 117 | |
a83000f5 | 118 | static int spapr_tce_table_realize(DeviceState *dev) |
ad0ebb91 | 119 | { |
a83000f5 | 120 | sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); |
ad0ebb91 DG |
121 | |
122 | if (kvm_enabled()) { | |
a83000f5 AL |
123 | tcet->table = kvmppc_create_spapr_tce(tcet->liobn, |
124 | tcet->window_size, | |
ad0ebb91 DG |
125 | &tcet->fd); |
126 | } | |
127 | ||
128 | if (!tcet->table) { | |
a83000f5 AL |
129 | size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) |
130 | * sizeof(uint64_t); | |
ad0ebb91 DG |
131 | tcet->table = g_malloc0(table_size); |
132 | } | |
a83000f5 | 133 | tcet->nb_table = tcet->window_size >> SPAPR_TCE_PAGE_SHIFT; |
ad0ebb91 | 134 | |
7e472264 | 135 | trace_spapr_iommu_new_table(tcet->liobn, tcet, tcet->table, tcet->fd); |
ad0ebb91 | 136 | |
a83000f5 | 137 | memory_region_init_iommu(&tcet->iommu, OBJECT(dev), &spapr_iommu_ops, |
a84bb436 | 138 | "iommu-spapr", UINT64_MAX); |
a84bb436 | 139 | |
ad0ebb91 DG |
140 | QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list); |
141 | ||
00d4f525 AK |
142 | vmstate_register(DEVICE(tcet), tcet->liobn, &vmstate_spapr_tce_table, |
143 | tcet); | |
144 | ||
a83000f5 AL |
145 | return 0; |
146 | } | |
147 | ||
148 | sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn, size_t window_size) | |
149 | { | |
150 | sPAPRTCETable *tcet; | |
151 | ||
152 | if (spapr_tce_find_by_liobn(liobn)) { | |
153 | fprintf(stderr, "Attempted to create TCE table with duplicate" | |
154 | " LIOBN 0x%x\n", liobn); | |
155 | return NULL; | |
156 | } | |
157 | ||
158 | if (!window_size) { | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE)); | |
163 | tcet->liobn = liobn; | |
164 | tcet->window_size = window_size; | |
165 | ||
166 | object_property_add_child(OBJECT(owner), "tce-table", OBJECT(tcet), NULL); | |
167 | ||
168 | qdev_init_nofail(DEVICE(tcet)); | |
169 | ||
2b7dc949 | 170 | return tcet; |
ad0ebb91 DG |
171 | } |
172 | ||
a83000f5 | 173 | static void spapr_tce_table_finalize(Object *obj) |
ad0ebb91 | 174 | { |
a83000f5 AL |
175 | sPAPRTCETable *tcet = SPAPR_TCE_TABLE(obj); |
176 | ||
2b7dc949 | 177 | QLIST_REMOVE(tcet, list); |
ad0ebb91 | 178 | |
2b7dc949 PB |
179 | if (!kvm_enabled() || |
180 | (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, | |
181 | tcet->window_size) != 0)) { | |
182 | g_free(tcet->table); | |
ad0ebb91 DG |
183 | } |
184 | } | |
185 | ||
a84bb436 PB |
186 | MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet) |
187 | { | |
188 | return &tcet->iommu; | |
189 | } | |
190 | ||
2b7dc949 PB |
191 | void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass) |
192 | { | |
53724ee5 DG |
193 | tcet->bypass = bypass; |
194 | } | |
195 | ||
a83000f5 | 196 | static void spapr_tce_reset(DeviceState *dev) |
eddeed26 | 197 | { |
a83000f5 | 198 | sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); |
53724ee5 | 199 | size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) |
a83000f5 | 200 | * sizeof(uint64_t); |
eddeed26 | 201 | |
53724ee5 DG |
202 | tcet->bypass = false; |
203 | memset(tcet->table, 0, table_size); | |
eddeed26 DG |
204 | } |
205 | ||
edded454 DG |
206 | static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, |
207 | target_ulong tce) | |
208 | { | |
a84bb436 | 209 | IOMMUTLBEntry entry; |
edded454 DG |
210 | |
211 | if (ioba >= tcet->window_size) { | |
b55519a0 | 212 | hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x" |
edded454 DG |
213 | TARGET_FMT_lx "\n", ioba); |
214 | return H_PARAMETER; | |
215 | } | |
216 | ||
a83000f5 | 217 | tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT] = tce; |
edded454 | 218 | |
a84bb436 PB |
219 | entry.target_as = &address_space_memory, |
220 | entry.iova = ioba & ~SPAPR_TCE_PAGE_MASK; | |
221 | entry.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK; | |
222 | entry.addr_mask = SPAPR_TCE_PAGE_MASK; | |
223 | entry.perm = tce; | |
224 | memory_region_notify_iommu(&tcet->iommu, entry); | |
225 | ||
edded454 DG |
226 | return H_SUCCESS; |
227 | } | |
ad0ebb91 | 228 | |
b13ce26d | 229 | static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
ad0ebb91 DG |
230 | target_ulong opcode, target_ulong *args) |
231 | { | |
232 | target_ulong liobn = args[0]; | |
233 | target_ulong ioba = args[1]; | |
234 | target_ulong tce = args[2]; | |
7e472264 | 235 | target_ulong ret = H_PARAMETER; |
ad0ebb91 | 236 | sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); |
ad0ebb91 | 237 | |
ad0ebb91 DG |
238 | ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); |
239 | ||
edded454 | 240 | if (tcet) { |
7e472264 | 241 | ret = put_tce_emu(tcet, ioba, tce); |
edded454 | 242 | } |
7e472264 | 243 | trace_spapr_iommu_put(liobn, ioba, tce, ret); |
ad0ebb91 | 244 | |
7e472264 | 245 | return ret; |
ad0ebb91 DG |
246 | } |
247 | ||
a0fcac9c LD |
248 | static target_ulong get_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, |
249 | target_ulong *tce) | |
250 | { | |
251 | if (ioba >= tcet->window_size) { | |
252 | hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x" | |
253 | TARGET_FMT_lx "\n", ioba); | |
254 | return H_PARAMETER; | |
255 | } | |
256 | ||
257 | *tce = tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT]; | |
258 | ||
259 | return H_SUCCESS; | |
260 | } | |
261 | ||
262 | static target_ulong h_get_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, | |
263 | target_ulong opcode, target_ulong *args) | |
264 | { | |
265 | target_ulong liobn = args[0]; | |
266 | target_ulong ioba = args[1]; | |
267 | target_ulong tce = 0; | |
268 | target_ulong ret = H_PARAMETER; | |
269 | sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); | |
270 | ||
271 | ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); | |
272 | ||
273 | if (tcet) { | |
274 | ret = get_tce_emu(tcet, ioba, &tce); | |
275 | if (!ret) { | |
276 | args[0] = tce; | |
277 | } | |
278 | } | |
279 | trace_spapr_iommu_get(liobn, ioba, ret, tce); | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
ad0ebb91 | 284 | int spapr_dma_dt(void *fdt, int node_off, const char *propname, |
5c4cbcf2 | 285 | uint32_t liobn, uint64_t window, uint32_t size) |
ad0ebb91 | 286 | { |
5c4cbcf2 AK |
287 | uint32_t dma_prop[5]; |
288 | int ret; | |
289 | ||
290 | dma_prop[0] = cpu_to_be32(liobn); | |
291 | dma_prop[1] = cpu_to_be32(window >> 32); | |
292 | dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF); | |
293 | dma_prop[3] = 0; /* window size is 32 bits */ | |
294 | dma_prop[4] = cpu_to_be32(size); | |
295 | ||
296 | ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); | |
297 | if (ret < 0) { | |
298 | return ret; | |
299 | } | |
ad0ebb91 | 300 | |
5c4cbcf2 AK |
301 | ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); |
302 | if (ret < 0) { | |
303 | return ret; | |
304 | } | |
ad0ebb91 | 305 | |
5c4cbcf2 AK |
306 | ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop)); |
307 | if (ret < 0) { | |
308 | return ret; | |
ad0ebb91 DG |
309 | } |
310 | ||
311 | return 0; | |
312 | } | |
5c4cbcf2 AK |
313 | |
314 | int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname, | |
2b7dc949 | 315 | sPAPRTCETable *tcet) |
5c4cbcf2 | 316 | { |
2b7dc949 | 317 | if (!tcet) { |
5c4cbcf2 AK |
318 | return 0; |
319 | } | |
320 | ||
2b7dc949 PB |
321 | return spapr_dma_dt(fdt, node_off, propname, |
322 | tcet->liobn, 0, tcet->window_size); | |
5c4cbcf2 | 323 | } |
a83000f5 AL |
324 | |
325 | static void spapr_tce_table_class_init(ObjectClass *klass, void *data) | |
326 | { | |
327 | DeviceClass *dc = DEVICE_CLASS(klass); | |
a83000f5 AL |
328 | dc->init = spapr_tce_table_realize; |
329 | dc->reset = spapr_tce_reset; | |
330 | ||
331 | QLIST_INIT(&spapr_tce_tables); | |
332 | ||
333 | /* hcall-tce */ | |
334 | spapr_register_hypercall(H_PUT_TCE, h_put_tce); | |
a0fcac9c | 335 | spapr_register_hypercall(H_GET_TCE, h_get_tce); |
a83000f5 AL |
336 | } |
337 | ||
338 | static TypeInfo spapr_tce_table_info = { | |
339 | .name = TYPE_SPAPR_TCE_TABLE, | |
340 | .parent = TYPE_DEVICE, | |
341 | .instance_size = sizeof(sPAPRTCETable), | |
342 | .class_init = spapr_tce_table_class_init, | |
343 | .instance_finalize = spapr_tce_table_finalize, | |
344 | }; | |
345 | ||
346 | static void register_types(void) | |
347 | { | |
348 | type_register_static(&spapr_tce_table_info); | |
349 | } | |
350 | ||
351 | type_init(register_types); |