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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" |
ad0ebb91 | 25 | |
0d09e41a | 26 | #include "hw/ppc/spapr.h" |
ad0ebb91 DG |
27 | |
28 | #include <libfdt.h> | |
29 | ||
30 | /* #define DEBUG_TCE */ | |
31 | ||
32 | enum sPAPRTCEAccess { | |
33 | SPAPR_TCE_FAULT = 0, | |
34 | SPAPR_TCE_RO = 1, | |
35 | SPAPR_TCE_WO = 2, | |
36 | SPAPR_TCE_RW = 3, | |
37 | }; | |
38 | ||
ad0ebb91 | 39 | struct sPAPRTCETable { |
ad0ebb91 DG |
40 | uint32_t liobn; |
41 | uint32_t window_size; | |
42 | sPAPRTCE *table; | |
53724ee5 | 43 | bool bypass; |
ad0ebb91 | 44 | int fd; |
a84bb436 | 45 | MemoryRegion iommu; |
ad0ebb91 DG |
46 | QLIST_ENTRY(sPAPRTCETable) list; |
47 | }; | |
48 | ||
49 | ||
50 | QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables; | |
51 | ||
52 | static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn) | |
53 | { | |
54 | sPAPRTCETable *tcet; | |
55 | ||
d4261662 DG |
56 | if (liobn & 0xFFFFFFFF00000000ULL) { |
57 | hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n", | |
58 | liobn); | |
59 | return NULL; | |
60 | } | |
61 | ||
ad0ebb91 DG |
62 | QLIST_FOREACH(tcet, &spapr_tce_tables, list) { |
63 | if (tcet->liobn == liobn) { | |
64 | return tcet; | |
65 | } | |
66 | } | |
67 | ||
68 | return NULL; | |
69 | } | |
70 | ||
a84bb436 | 71 | static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr) |
ad0ebb91 | 72 | { |
a84bb436 | 73 | sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu); |
ad0ebb91 DG |
74 | uint64_t tce; |
75 | ||
76 | #ifdef DEBUG_TCE | |
77 | fprintf(stderr, "spapr_tce_translate liobn=0x%" PRIx32 " addr=0x" | |
78 | DMA_ADDR_FMT "\n", tcet->liobn, addr); | |
79 | #endif | |
80 | ||
53724ee5 | 81 | if (tcet->bypass) { |
a71bfbfe PB |
82 | return (IOMMUTLBEntry) { |
83 | .target_as = &address_space_memory, | |
84 | .iova = 0, | |
85 | .translated_addr = 0, | |
86 | .addr_mask = ~(hwaddr)0, | |
87 | .perm = IOMMU_RW, | |
88 | }; | |
53724ee5 DG |
89 | } |
90 | ||
ad0ebb91 DG |
91 | /* Check if we are in bound */ |
92 | if (addr >= tcet->window_size) { | |
93 | #ifdef DEBUG_TCE | |
94 | fprintf(stderr, "spapr_tce_translate out of bounds\n"); | |
95 | #endif | |
a71bfbfe | 96 | return (IOMMUTLBEntry) { .perm = IOMMU_NONE }; |
ad0ebb91 DG |
97 | } |
98 | ||
99 | tce = tcet->table[addr >> SPAPR_TCE_PAGE_SHIFT].tce; | |
100 | ||
a71bfbfe PB |
101 | #ifdef DEBUG_TCE |
102 | fprintf(stderr, " -> *paddr=0x%llx, *len=0x%llx\n", | |
103 | (tce & ~SPAPR_TCE_PAGE_MASK), SPAPR_TCE_PAGE_MASK + 1); | |
104 | #endif | |
105 | ||
106 | return (IOMMUTLBEntry) { | |
107 | .target_as = &address_space_memory, | |
108 | .iova = addr & ~SPAPR_TCE_PAGE_MASK, | |
109 | .translated_addr = tce & ~SPAPR_TCE_PAGE_MASK, | |
110 | .addr_mask = SPAPR_TCE_PAGE_MASK, | |
111 | .perm = tce, | |
112 | }; | |
113 | } | |
114 | ||
a84bb436 PB |
115 | static MemoryRegionIOMMUOps spapr_iommu_ops = { |
116 | .translate = spapr_tce_translate_iommu, | |
117 | }; | |
ad0ebb91 | 118 | |
84af6d9f | 119 | sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn, size_t window_size) |
ad0ebb91 DG |
120 | { |
121 | sPAPRTCETable *tcet; | |
122 | ||
8b1853e7 DG |
123 | if (spapr_tce_find_by_liobn(liobn)) { |
124 | fprintf(stderr, "Attempted to create TCE table with duplicate" | |
125 | " LIOBN 0x%x\n", liobn); | |
126 | return NULL; | |
127 | } | |
128 | ||
ad0ebb91 DG |
129 | if (!window_size) { |
130 | return NULL; | |
131 | } | |
132 | ||
133 | tcet = g_malloc0(sizeof(*tcet)); | |
ad0ebb91 DG |
134 | tcet->liobn = liobn; |
135 | tcet->window_size = window_size; | |
136 | ||
137 | if (kvm_enabled()) { | |
138 | tcet->table = kvmppc_create_spapr_tce(liobn, | |
139 | window_size, | |
140 | &tcet->fd); | |
141 | } | |
142 | ||
143 | if (!tcet->table) { | |
144 | size_t table_size = (window_size >> SPAPR_TCE_PAGE_SHIFT) | |
145 | * sizeof(sPAPRTCE); | |
146 | tcet->table = g_malloc0(table_size); | |
147 | } | |
148 | ||
149 | #ifdef DEBUG_TCE | |
2b7dc949 PB |
150 | fprintf(stderr, "spapr_iommu: New TCE table @ %p, liobn=0x%x, " |
151 | "table @ %p, fd=%d\n", tcet, liobn, tcet->table, tcet->fd); | |
ad0ebb91 DG |
152 | #endif |
153 | ||
84af6d9f | 154 | memory_region_init_iommu(&tcet->iommu, OBJECT(owner), &spapr_iommu_ops, |
a84bb436 | 155 | "iommu-spapr", UINT64_MAX); |
a84bb436 | 156 | |
ad0ebb91 DG |
157 | QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list); |
158 | ||
2b7dc949 | 159 | return tcet; |
ad0ebb91 DG |
160 | } |
161 | ||
2b7dc949 | 162 | void spapr_tce_free(sPAPRTCETable *tcet) |
ad0ebb91 | 163 | { |
2b7dc949 | 164 | QLIST_REMOVE(tcet, list); |
ad0ebb91 | 165 | |
2b7dc949 PB |
166 | if (!kvm_enabled() || |
167 | (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, | |
168 | tcet->window_size) != 0)) { | |
169 | g_free(tcet->table); | |
ad0ebb91 | 170 | } |
2b7dc949 PB |
171 | |
172 | g_free(tcet); | |
ad0ebb91 DG |
173 | } |
174 | ||
a84bb436 PB |
175 | MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet) |
176 | { | |
177 | return &tcet->iommu; | |
178 | } | |
179 | ||
2b7dc949 PB |
180 | void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass) |
181 | { | |
53724ee5 DG |
182 | tcet->bypass = bypass; |
183 | } | |
184 | ||
2b7dc949 | 185 | void spapr_tce_reset(sPAPRTCETable *tcet) |
eddeed26 | 186 | { |
53724ee5 DG |
187 | size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) |
188 | * sizeof(sPAPRTCE); | |
eddeed26 | 189 | |
53724ee5 DG |
190 | tcet->bypass = false; |
191 | memset(tcet->table, 0, table_size); | |
eddeed26 DG |
192 | } |
193 | ||
edded454 DG |
194 | static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, |
195 | target_ulong tce) | |
196 | { | |
197 | sPAPRTCE *tcep; | |
a84bb436 | 198 | IOMMUTLBEntry entry; |
edded454 DG |
199 | |
200 | if (ioba >= tcet->window_size) { | |
b55519a0 | 201 | hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x" |
edded454 DG |
202 | TARGET_FMT_lx "\n", ioba); |
203 | return H_PARAMETER; | |
204 | } | |
205 | ||
206 | tcep = tcet->table + (ioba >> SPAPR_TCE_PAGE_SHIFT); | |
207 | tcep->tce = tce; | |
208 | ||
a84bb436 PB |
209 | entry.target_as = &address_space_memory, |
210 | entry.iova = ioba & ~SPAPR_TCE_PAGE_MASK; | |
211 | entry.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK; | |
212 | entry.addr_mask = SPAPR_TCE_PAGE_MASK; | |
213 | entry.perm = tce; | |
214 | memory_region_notify_iommu(&tcet->iommu, entry); | |
215 | ||
edded454 DG |
216 | return H_SUCCESS; |
217 | } | |
ad0ebb91 | 218 | |
b13ce26d | 219 | static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, |
ad0ebb91 DG |
220 | target_ulong opcode, target_ulong *args) |
221 | { | |
222 | target_ulong liobn = args[0]; | |
223 | target_ulong ioba = args[1]; | |
224 | target_ulong tce = args[2]; | |
225 | sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); | |
ad0ebb91 | 226 | |
ad0ebb91 DG |
227 | ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); |
228 | ||
edded454 DG |
229 | if (tcet) { |
230 | return put_tce_emu(tcet, ioba, tce); | |
231 | } | |
ad0ebb91 | 232 | #ifdef DEBUG_TCE |
edded454 | 233 | fprintf(stderr, "%s on liobn=" TARGET_FMT_lx /*%s*/ |
ad0ebb91 | 234 | " ioba 0x" TARGET_FMT_lx " TCE 0x" TARGET_FMT_lx "\n", |
edded454 | 235 | __func__, liobn, /*dev->qdev.id, */ioba, tce); |
ad0ebb91 DG |
236 | #endif |
237 | ||
edded454 | 238 | return H_PARAMETER; |
ad0ebb91 DG |
239 | } |
240 | ||
241 | void spapr_iommu_init(void) | |
242 | { | |
243 | QLIST_INIT(&spapr_tce_tables); | |
244 | ||
245 | /* hcall-tce */ | |
246 | spapr_register_hypercall(H_PUT_TCE, h_put_tce); | |
247 | } | |
248 | ||
249 | int spapr_dma_dt(void *fdt, int node_off, const char *propname, | |
5c4cbcf2 | 250 | uint32_t liobn, uint64_t window, uint32_t size) |
ad0ebb91 | 251 | { |
5c4cbcf2 AK |
252 | uint32_t dma_prop[5]; |
253 | int ret; | |
254 | ||
255 | dma_prop[0] = cpu_to_be32(liobn); | |
256 | dma_prop[1] = cpu_to_be32(window >> 32); | |
257 | dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF); | |
258 | dma_prop[3] = 0; /* window size is 32 bits */ | |
259 | dma_prop[4] = cpu_to_be32(size); | |
260 | ||
261 | ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); | |
262 | if (ret < 0) { | |
263 | return ret; | |
264 | } | |
ad0ebb91 | 265 | |
5c4cbcf2 AK |
266 | ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); |
267 | if (ret < 0) { | |
268 | return ret; | |
269 | } | |
ad0ebb91 | 270 | |
5c4cbcf2 AK |
271 | ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop)); |
272 | if (ret < 0) { | |
273 | return ret; | |
ad0ebb91 DG |
274 | } |
275 | ||
276 | return 0; | |
277 | } | |
5c4cbcf2 AK |
278 | |
279 | int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname, | |
2b7dc949 | 280 | sPAPRTCETable *tcet) |
5c4cbcf2 | 281 | { |
2b7dc949 | 282 | if (!tcet) { |
5c4cbcf2 AK |
283 | return 0; |
284 | } | |
285 | ||
2b7dc949 PB |
286 | return spapr_dma_dt(fdt, node_off, propname, |
287 | tcet->liobn, 0, tcet->window_size); | |
5c4cbcf2 | 288 | } |