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aeaef83d CLG |
1 | /* |
2 | * QEMU PowerNV, BMC related functions | |
3 | * | |
4 | * Copyright (c) 2016-2017, IBM Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License, version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include "qemu/osdep.h" | |
e2392d43 | 20 | #include "qapi/error.h" |
aeaef83d | 21 | #include "target/ppc/cpu.h" |
aeaef83d CLG |
22 | #include "qemu/log.h" |
23 | #include "hw/ipmi/ipmi.h" | |
24 | #include "hw/ppc/fdt.h" | |
25 | ||
26 | #include "hw/ppc/pnv.h" | |
27 | ||
28 | #include <libfdt.h> | |
29 | ||
30 | /* TODO: include definition in ipmi.h */ | |
31 | #define IPMI_SDR_FULL_TYPE 1 | |
32 | ||
bce0b691 CLG |
33 | /* |
34 | * OEM SEL Event data packet sent by BMC in response of a Read Event | |
35 | * Message Buffer command | |
36 | */ | |
37 | typedef struct OemSel { | |
38 | /* SEL header */ | |
39 | uint8_t id[2]; | |
40 | uint8_t type; | |
41 | uint8_t timestamp[4]; | |
42 | uint8_t manuf_id[3]; | |
43 | ||
44 | /* OEM SEL data (6 bytes) follows */ | |
45 | uint8_t netfun; | |
46 | uint8_t cmd; | |
47 | uint8_t data[4]; | |
48 | } OemSel; | |
49 | ||
50 | #define SOFT_OFF 0x00 | |
51 | #define SOFT_REBOOT 0x01 | |
52 | ||
50ae2452 CLG |
53 | static bool pnv_bmc_is_simulator(IPMIBmc *bmc) |
54 | { | |
55 | return object_dynamic_cast(OBJECT(bmc), TYPE_IPMI_BMC_SIMULATOR); | |
56 | } | |
57 | ||
bce0b691 CLG |
58 | static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot) |
59 | { | |
60 | /* IPMI SEL Event are 16 bytes long */ | |
61 | OemSel sel = { | |
62 | .id = { 0x55 , 0x55 }, | |
63 | .type = 0xC0, /* OEM */ | |
64 | .manuf_id = { 0x0, 0x0, 0x0 }, | |
65 | .timestamp = { 0x0, 0x0, 0x0, 0x0 }, | |
66 | .netfun = 0x3A, /* IBM */ | |
67 | .cmd = 0x04, /* AMI OEM SEL Power Notification */ | |
68 | .data = { reboot, 0xFF, 0xFF, 0xFF }, | |
69 | }; | |
70 | ||
71 | ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */); | |
72 | } | |
73 | ||
74 | void pnv_bmc_powerdown(IPMIBmc *bmc) | |
75 | { | |
76 | pnv_gen_oem_sel(bmc, SOFT_OFF); | |
77 | } | |
78 | ||
b168a138 | 79 | void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt) |
aeaef83d CLG |
80 | { |
81 | int offset; | |
82 | int i; | |
83 | const struct ipmi_sdr_compact *sdr; | |
84 | uint16_t nextrec; | |
85 | ||
50ae2452 CLG |
86 | if (!pnv_bmc_is_simulator(bmc)) { |
87 | return; | |
88 | } | |
89 | ||
f42b6f53 | 90 | offset = fdt_add_subnode(fdt, 0, "bmc"); |
aeaef83d CLG |
91 | _FDT(offset); |
92 | ||
93 | _FDT((fdt_setprop_string(fdt, offset, "name", "bmc"))); | |
aeaef83d CLG |
94 | offset = fdt_add_subnode(fdt, offset, "sensors"); |
95 | _FDT(offset); | |
96 | ||
97 | _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1))); | |
98 | _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0))); | |
99 | ||
100 | for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) { | |
101 | int off; | |
102 | char *name; | |
103 | ||
104 | if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE && | |
105 | sdr->header.rec_type != IPMI_SDR_FULL_TYPE) { | |
106 | continue; | |
107 | } | |
108 | ||
109 | name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number); | |
110 | off = fdt_add_subnode(fdt, offset, name); | |
111 | _FDT(off); | |
112 | g_free(name); | |
113 | ||
114 | _FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number))); | |
115 | _FDT((fdt_setprop_string(fdt, off, "name", "sensor"))); | |
116 | _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor"))); | |
117 | _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type", | |
118 | sdr->reading_type))); | |
119 | _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id", | |
120 | sdr->entity_id))); | |
121 | _FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance", | |
122 | sdr->entity_instance))); | |
123 | _FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type", | |
124 | sdr->sensor_type))); | |
125 | } | |
126 | } | |
ca661fae CLG |
127 | |
128 | /* | |
129 | * HIOMAP protocol handler | |
130 | */ | |
131 | #define HIOMAP_C_RESET 1 | |
132 | #define HIOMAP_C_GET_INFO 2 | |
133 | #define HIOMAP_C_GET_FLASH_INFO 3 | |
134 | #define HIOMAP_C_CREATE_READ_WINDOW 4 | |
135 | #define HIOMAP_C_CLOSE_WINDOW 5 | |
136 | #define HIOMAP_C_CREATE_WRITE_WINDOW 6 | |
137 | #define HIOMAP_C_MARK_DIRTY 7 | |
138 | #define HIOMAP_C_FLUSH 8 | |
139 | #define HIOMAP_C_ACK 9 | |
140 | #define HIOMAP_C_ERASE 10 | |
141 | #define HIOMAP_C_DEVICE_NAME 11 | |
142 | #define HIOMAP_C_LOCK 12 | |
143 | ||
144 | #define BLOCK_SHIFT 12 /* 4K */ | |
145 | ||
146 | static uint16_t bytes_to_blocks(uint32_t bytes) | |
147 | { | |
148 | return bytes >> BLOCK_SHIFT; | |
149 | } | |
150 | ||
c02f9892 CLG |
151 | static uint32_t blocks_to_bytes(uint16_t blocks) |
152 | { | |
153 | return blocks << BLOCK_SHIFT; | |
154 | } | |
155 | ||
156 | static int hiomap_erase(PnvPnor *pnor, uint32_t offset, uint32_t size) | |
157 | { | |
158 | MemTxResult result; | |
159 | int i; | |
160 | ||
161 | for (i = 0; i < size / 4; i++) { | |
162 | result = memory_region_dispatch_write(&pnor->mmio, offset + i * 4, | |
163 | 0xFFFFFFFF, MO_32, | |
164 | MEMTXATTRS_UNSPECIFIED); | |
165 | if (result != MEMTX_OK) { | |
166 | return -1; | |
167 | } | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
ca661fae CLG |
172 | static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len, |
173 | RspBuffer *rsp) | |
174 | { | |
d8137bb7 GK |
175 | PnvPnor *pnor = PNV_PNOR(object_property_get_link(OBJECT(ibs), "pnor", |
176 | &error_abort)); | |
ca661fae CLG |
177 | uint32_t pnor_size = pnor->size; |
178 | uint32_t pnor_addr = PNOR_SPI_OFFSET; | |
179 | bool readonly = false; | |
180 | ||
181 | rsp_buffer_push(rsp, cmd[2]); | |
182 | rsp_buffer_push(rsp, cmd[3]); | |
183 | ||
184 | switch (cmd[2]) { | |
185 | case HIOMAP_C_MARK_DIRTY: | |
186 | case HIOMAP_C_FLUSH: | |
ca661fae CLG |
187 | case HIOMAP_C_ACK: |
188 | break; | |
189 | ||
c02f9892 CLG |
190 | case HIOMAP_C_ERASE: |
191 | if (hiomap_erase(pnor, blocks_to_bytes(cmd[5] << 8 | cmd[4]), | |
192 | blocks_to_bytes(cmd[7] << 8 | cmd[6]))) { | |
193 | rsp_buffer_set_error(rsp, IPMI_CC_UNSPECIFIED); | |
194 | } | |
195 | break; | |
196 | ||
ca661fae CLG |
197 | case HIOMAP_C_GET_INFO: |
198 | rsp_buffer_push(rsp, 2); /* Version 2 */ | |
199 | rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */ | |
200 | rsp_buffer_push(rsp, 0); /* Timeout */ | |
201 | rsp_buffer_push(rsp, 0); /* Timeout */ | |
202 | break; | |
203 | ||
204 | case HIOMAP_C_GET_FLASH_INFO: | |
205 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); | |
206 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); | |
207 | rsp_buffer_push(rsp, 0x01); /* erase size */ | |
208 | rsp_buffer_push(rsp, 0x00); /* erase size */ | |
209 | break; | |
210 | ||
211 | case HIOMAP_C_CREATE_READ_WINDOW: | |
212 | readonly = true; | |
213 | /* Fall through */ | |
214 | ||
215 | case HIOMAP_C_CREATE_WRITE_WINDOW: | |
216 | memory_region_set_readonly(&pnor->mmio, readonly); | |
217 | memory_region_set_enabled(&pnor->mmio, true); | |
218 | ||
219 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF); | |
220 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8); | |
221 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF); | |
222 | rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8); | |
223 | rsp_buffer_push(rsp, 0x00); /* offset */ | |
224 | rsp_buffer_push(rsp, 0x00); /* offset */ | |
225 | break; | |
226 | ||
227 | case HIOMAP_C_CLOSE_WINDOW: | |
228 | memory_region_set_enabled(&pnor->mmio, false); | |
229 | break; | |
230 | ||
231 | case HIOMAP_C_DEVICE_NAME: | |
232 | case HIOMAP_C_RESET: | |
233 | case HIOMAP_C_LOCK: | |
234 | default: | |
cba42d61 | 235 | qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknown command %02X\n", cmd[2]); |
ca661fae CLG |
236 | break; |
237 | } | |
238 | } | |
239 | ||
240 | #define HIOMAP 0x5a | |
241 | ||
242 | static const IPMICmdHandler hiomap_cmds[] = { | |
243 | [HIOMAP] = { hiomap_cmd, 3 }, | |
244 | }; | |
245 | ||
246 | static const IPMINetfn hiomap_netfn = { | |
247 | .cmd_nums = ARRAY_SIZE(hiomap_cmds), | |
248 | .cmd_handlers = hiomap_cmds | |
249 | }; | |
250 | ||
25f3170b CLG |
251 | |
252 | void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor) | |
253 | { | |
50ae2452 CLG |
254 | if (!pnv_bmc_is_simulator(bmc)) { |
255 | return; | |
256 | } | |
257 | ||
25f3170b | 258 | object_ref(OBJECT(pnor)); |
d2623129 | 259 | object_property_add_const_link(OBJECT(bmc), "pnor", OBJECT(pnor)); |
25f3170b CLG |
260 | |
261 | /* Install the HIOMAP protocol handlers to access the PNOR */ | |
262 | ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc), IPMI_NETFN_OEM, | |
263 | &hiomap_netfn); | |
264 | } | |
265 | ||
e2392d43 CLG |
266 | /* |
267 | * Instantiate the machine BMC. PowerNV uses the QEMU internal | |
268 | * simulator but it could also be external. | |
269 | */ | |
d8137bb7 | 270 | IPMIBmc *pnv_bmc_create(PnvPnor *pnor) |
ca661fae | 271 | { |
e2392d43 CLG |
272 | Object *obj; |
273 | ||
274 | obj = object_new(TYPE_IPMI_BMC_SIMULATOR); | |
ce189ab2 | 275 | qdev_realize(DEVICE(obj), NULL, &error_fatal); |
60ef8010 | 276 | pnv_bmc_set_pnor(IPMI_BMC(obj), pnor); |
e2392d43 CLG |
277 | |
278 | return IPMI_BMC(obj); | |
ca661fae | 279 | } |
25f3170b CLG |
280 | |
281 | typedef struct ForeachArgs { | |
282 | const char *name; | |
283 | Object *obj; | |
284 | } ForeachArgs; | |
285 | ||
286 | static int bmc_find(Object *child, void *opaque) | |
287 | { | |
288 | ForeachArgs *args = opaque; | |
289 | ||
290 | if (object_dynamic_cast(child, args->name)) { | |
291 | if (args->obj) { | |
292 | return 1; | |
293 | } | |
294 | args->obj = child; | |
295 | } | |
296 | return 0; | |
297 | } | |
298 | ||
299 | IPMIBmc *pnv_bmc_find(Error **errp) | |
300 | { | |
50ae2452 | 301 | ForeachArgs args = { TYPE_IPMI_BMC, NULL }; |
25f3170b CLG |
302 | int ret; |
303 | ||
304 | ret = object_child_foreach_recursive(object_get_root(), bmc_find, &args); | |
305 | if (ret) { | |
306 | error_setg(errp, "machine should have only one BMC device. " | |
307 | "Use '-nodefaults'"); | |
308 | return NULL; | |
309 | } | |
310 | ||
311 | return args.obj ? IPMI_BMC(args.obj) : NULL; | |
312 | } |