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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 | ||
39 | typedef struct sPAPRTCETable sPAPRTCETable; | |
40 | ||
41 | struct sPAPRTCETable { | |
42 | DMAContext dma; | |
43 | uint32_t liobn; | |
44 | uint32_t window_size; | |
45 | sPAPRTCE *table; | |
53724ee5 | 46 | bool bypass; |
ad0ebb91 DG |
47 | int fd; |
48 | QLIST_ENTRY(sPAPRTCETable) list; | |
49 | }; | |
50 | ||
51 | ||
52 | QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables; | |
53 | ||
54 | static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn) | |
55 | { | |
56 | sPAPRTCETable *tcet; | |
57 | ||
d4261662 DG |
58 | if (liobn & 0xFFFFFFFF00000000ULL) { |
59 | hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n", | |
60 | liobn); | |
61 | return NULL; | |
62 | } | |
63 | ||
ad0ebb91 DG |
64 | QLIST_FOREACH(tcet, &spapr_tce_tables, list) { |
65 | if (tcet->liobn == liobn) { | |
66 | return tcet; | |
67 | } | |
68 | } | |
69 | ||
70 | return NULL; | |
71 | } | |
72 | ||
73 | static int spapr_tce_translate(DMAContext *dma, | |
74 | dma_addr_t addr, | |
a8170e5e AK |
75 | hwaddr *paddr, |
76 | hwaddr *len, | |
ad0ebb91 DG |
77 | DMADirection dir) |
78 | { | |
79 | sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, dma); | |
80 | enum sPAPRTCEAccess access = (dir == DMA_DIRECTION_FROM_DEVICE) | |
81 | ? SPAPR_TCE_WO : SPAPR_TCE_RO; | |
82 | uint64_t tce; | |
83 | ||
84 | #ifdef DEBUG_TCE | |
85 | fprintf(stderr, "spapr_tce_translate liobn=0x%" PRIx32 " addr=0x" | |
86 | DMA_ADDR_FMT "\n", tcet->liobn, addr); | |
87 | #endif | |
88 | ||
53724ee5 DG |
89 | if (tcet->bypass) { |
90 | *paddr = addr; | |
a8170e5e | 91 | *len = (hwaddr)-1; |
53724ee5 DG |
92 | return 0; |
93 | } | |
94 | ||
ad0ebb91 DG |
95 | /* Check if we are in bound */ |
96 | if (addr >= tcet->window_size) { | |
97 | #ifdef DEBUG_TCE | |
98 | fprintf(stderr, "spapr_tce_translate out of bounds\n"); | |
99 | #endif | |
100 | return -EFAULT; | |
101 | } | |
102 | ||
103 | tce = tcet->table[addr >> SPAPR_TCE_PAGE_SHIFT].tce; | |
104 | ||
105 | /* Check TCE */ | |
106 | if (!(tce & access)) { | |
107 | return -EPERM; | |
108 | } | |
109 | ||
110 | /* How much til end of page ? */ | |
111 | *len = ((~addr) & SPAPR_TCE_PAGE_MASK) + 1; | |
112 | ||
113 | /* Translate */ | |
114 | *paddr = (tce & ~SPAPR_TCE_PAGE_MASK) | | |
115 | (addr & SPAPR_TCE_PAGE_MASK); | |
116 | ||
117 | #ifdef DEBUG_TCE | |
118 | fprintf(stderr, " -> *paddr=0x" TARGET_FMT_plx ", *len=0x" | |
119 | TARGET_FMT_plx "\n", *paddr, *len); | |
120 | #endif | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size) | |
126 | { | |
127 | sPAPRTCETable *tcet; | |
128 | ||
8b1853e7 DG |
129 | if (spapr_tce_find_by_liobn(liobn)) { |
130 | fprintf(stderr, "Attempted to create TCE table with duplicate" | |
131 | " LIOBN 0x%x\n", liobn); | |
132 | return NULL; | |
133 | } | |
134 | ||
ad0ebb91 DG |
135 | if (!window_size) { |
136 | return NULL; | |
137 | } | |
138 | ||
139 | tcet = g_malloc0(sizeof(*tcet)); | |
b90600ee | 140 | dma_context_init(&tcet->dma, &address_space_memory, spapr_tce_translate, NULL, NULL); |
ad0ebb91 DG |
141 | |
142 | tcet->liobn = liobn; | |
143 | tcet->window_size = window_size; | |
144 | ||
145 | if (kvm_enabled()) { | |
146 | tcet->table = kvmppc_create_spapr_tce(liobn, | |
147 | window_size, | |
148 | &tcet->fd); | |
149 | } | |
150 | ||
151 | if (!tcet->table) { | |
152 | size_t table_size = (window_size >> SPAPR_TCE_PAGE_SHIFT) | |
153 | * sizeof(sPAPRTCE); | |
154 | tcet->table = g_malloc0(table_size); | |
155 | } | |
156 | ||
157 | #ifdef DEBUG_TCE | |
158 | fprintf(stderr, "spapr_iommu: New TCE table, liobn=0x%x, context @ %p, " | |
159 | "table @ %p, fd=%d\n", liobn, &tcet->dma, tcet->table, tcet->fd); | |
160 | #endif | |
161 | ||
162 | QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list); | |
163 | ||
164 | return &tcet->dma; | |
165 | } | |
166 | ||
167 | void spapr_tce_free(DMAContext *dma) | |
168 | { | |
169 | ||
170 | if (dma) { | |
171 | sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, dma); | |
172 | ||
173 | QLIST_REMOVE(tcet, list); | |
174 | ||
175 | if (!kvm_enabled() || | |
176 | (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, | |
177 | tcet->window_size) != 0)) { | |
178 | g_free(tcet->table); | |
179 | } | |
180 | ||
181 | g_free(tcet); | |
182 | } | |
183 | } | |
184 | ||
53724ee5 DG |
185 | void spapr_tce_set_bypass(DMAContext *dma, bool bypass) |
186 | { | |
187 | sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, dma); | |
188 | ||
189 | tcet->bypass = bypass; | |
190 | } | |
191 | ||
eddeed26 DG |
192 | void spapr_tce_reset(DMAContext *dma) |
193 | { | |
53724ee5 DG |
194 | sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, dma); |
195 | size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) | |
196 | * sizeof(sPAPRTCE); | |
eddeed26 | 197 | |
53724ee5 DG |
198 | tcet->bypass = false; |
199 | memset(tcet->table, 0, table_size); | |
eddeed26 DG |
200 | } |
201 | ||
edded454 DG |
202 | static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, |
203 | target_ulong tce) | |
204 | { | |
205 | sPAPRTCE *tcep; | |
206 | ||
207 | if (ioba >= tcet->window_size) { | |
b55519a0 | 208 | hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x" |
edded454 DG |
209 | TARGET_FMT_lx "\n", ioba); |
210 | return H_PARAMETER; | |
211 | } | |
212 | ||
213 | tcep = tcet->table + (ioba >> SPAPR_TCE_PAGE_SHIFT); | |
214 | tcep->tce = tce; | |
215 | ||
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, | |
280 | DMAContext *iommu) | |
281 | { | |
282 | if (!iommu) { | |
283 | return 0; | |
284 | } | |
285 | ||
286 | if (iommu->translate == spapr_tce_translate) { | |
287 | sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, iommu); | |
288 | return spapr_dma_dt(fdt, node_off, propname, | |
289 | tcet->liobn, 0, tcet->window_size); | |
290 | } | |
291 | ||
292 | return -1; | |
293 | } |