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Commit | Line | Data |
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bbf5c878 MR |
1 | /* |
2 | * QEMU SPAPR Dynamic Reconfiguration Connector Implementation | |
3 | * | |
4 | * Copyright IBM Corp. 2014 | |
5 | * | |
6 | * Authors: | |
7 | * Michael Roth <mdroth@linux.vnet.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | */ | |
12 | ||
0d75590d | 13 | #include "qemu/osdep.h" |
bbf5c878 MR |
14 | #include "hw/ppc/spapr_drc.h" |
15 | #include "qom/object.h" | |
16 | #include "hw/qdev.h" | |
17 | #include "qapi/visitor.h" | |
18 | #include "qemu/error-report.h" | |
0cb688d2 | 19 | #include "hw/ppc/spapr.h" /* for RTAS return codes */ |
bbf5c878 MR |
20 | |
21 | /* #define DEBUG_SPAPR_DRC */ | |
22 | ||
23 | #ifdef DEBUG_SPAPR_DRC | |
24 | #define DPRINTF(fmt, ...) \ | |
25 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
26 | #define DPRINTFN(fmt, ...) \ | |
27 | do { DPRINTF(fmt, ## __VA_ARGS__); fprintf(stderr, "\n"); } while (0) | |
28 | #else | |
29 | #define DPRINTF(fmt, ...) \ | |
30 | do { } while (0) | |
31 | #define DPRINTFN(fmt, ...) \ | |
32 | do { } while (0) | |
33 | #endif | |
34 | ||
35 | #define DRC_CONTAINER_PATH "/dr-connector" | |
36 | #define DRC_INDEX_TYPE_SHIFT 28 | |
627c2ef7 | 37 | #define DRC_INDEX_ID_MASK ((1ULL << DRC_INDEX_TYPE_SHIFT) - 1) |
bbf5c878 MR |
38 | |
39 | static sPAPRDRConnectorTypeShift get_type_shift(sPAPRDRConnectorType type) | |
40 | { | |
41 | uint32_t shift = 0; | |
42 | ||
43 | /* make sure this isn't SPAPR_DR_CONNECTOR_TYPE_ANY, or some | |
44 | * other wonky value. | |
45 | */ | |
46 | g_assert(is_power_of_2(type)); | |
47 | ||
48 | while (type != (1 << shift)) { | |
49 | shift++; | |
50 | } | |
51 | return shift; | |
52 | } | |
53 | ||
54 | static uint32_t get_index(sPAPRDRConnector *drc) | |
55 | { | |
56 | /* no set format for a drc index: it only needs to be globally | |
57 | * unique. this is how we encode the DRC type on bare-metal | |
58 | * however, so might as well do that here | |
59 | */ | |
60 | return (get_type_shift(drc->type) << DRC_INDEX_TYPE_SHIFT) | | |
61 | (drc->id & DRC_INDEX_ID_MASK); | |
62 | } | |
63 | ||
0cb688d2 MR |
64 | static uint32_t set_isolation_state(sPAPRDRConnector *drc, |
65 | sPAPRDRIsolationState state) | |
bbf5c878 MR |
66 | { |
67 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
68 | ||
69 | DPRINTFN("drc: %x, set_isolation_state: %x", get_index(drc), state); | |
70 | ||
9d1852ce MR |
71 | if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) { |
72 | /* cannot unisolate a non-existant resource, and, or resources | |
73 | * which are in an 'UNUSABLE' allocation state. (PAPR 2.7, 13.5.3.5) | |
74 | */ | |
75 | if (!drc->dev || | |
76 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
77 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
78 | } | |
79 | } | |
80 | ||
bbf5c878 MR |
81 | drc->isolation_state = state; |
82 | ||
83 | if (drc->isolation_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
84 | /* if we're awaiting release, but still in an unconfigured state, | |
85 | * it's likely the guest is still in the process of configuring | |
86 | * the device and is transitioning the devices to an ISOLATED | |
87 | * state as a part of that process. so we only complete the | |
88 | * removal when this transition happens for a device in a | |
89 | * configured state, as suggested by the state diagram from | |
90 | * PAPR+ 2.7, 13.4 | |
91 | */ | |
92 | if (drc->awaiting_release) { | |
93 | if (drc->configured) { | |
94 | DPRINTFN("finalizing device removal"); | |
95 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
96 | drc->detach_cb_opaque, NULL); | |
97 | } else { | |
98 | DPRINTFN("deferring device removal on unconfigured device\n"); | |
99 | } | |
100 | } | |
101 | drc->configured = false; | |
102 | } | |
103 | ||
0cb688d2 | 104 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
105 | } |
106 | ||
0cb688d2 MR |
107 | static uint32_t set_indicator_state(sPAPRDRConnector *drc, |
108 | sPAPRDRIndicatorState state) | |
bbf5c878 MR |
109 | { |
110 | DPRINTFN("drc: %x, set_indicator_state: %x", get_index(drc), state); | |
111 | drc->indicator_state = state; | |
0cb688d2 | 112 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
113 | } |
114 | ||
0cb688d2 MR |
115 | static uint32_t set_allocation_state(sPAPRDRConnector *drc, |
116 | sPAPRDRAllocationState state) | |
bbf5c878 MR |
117 | { |
118 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
119 | ||
120 | DPRINTFN("drc: %x, set_allocation_state: %x", get_index(drc), state); | |
121 | ||
9d1852ce MR |
122 | if (state == SPAPR_DR_ALLOCATION_STATE_USABLE) { |
123 | /* if there's no resource/device associated with the DRC, there's | |
124 | * no way for us to put it in an allocation state consistent with | |
125 | * being 'USABLE'. PAPR 2.7, 13.5.3.4 documents that this should | |
126 | * result in an RTAS return code of -3 / "no such indicator" | |
127 | */ | |
128 | if (!drc->dev) { | |
129 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
130 | } | |
131 | } | |
132 | ||
bbf5c878 MR |
133 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) { |
134 | drc->allocation_state = state; | |
135 | if (drc->awaiting_release && | |
136 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
137 | DPRINTFN("finalizing device removal"); | |
138 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
139 | drc->detach_cb_opaque, NULL); | |
140 | } | |
141 | } | |
0cb688d2 | 142 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
143 | } |
144 | ||
145 | static uint32_t get_type(sPAPRDRConnector *drc) | |
146 | { | |
147 | return drc->type; | |
148 | } | |
149 | ||
150 | static const char *get_name(sPAPRDRConnector *drc) | |
151 | { | |
152 | return drc->name; | |
153 | } | |
154 | ||
155 | static const void *get_fdt(sPAPRDRConnector *drc, int *fdt_start_offset) | |
156 | { | |
157 | if (fdt_start_offset) { | |
158 | *fdt_start_offset = drc->fdt_start_offset; | |
159 | } | |
160 | return drc->fdt; | |
161 | } | |
162 | ||
163 | static void set_configured(sPAPRDRConnector *drc) | |
164 | { | |
165 | DPRINTFN("drc: %x, set_configured", get_index(drc)); | |
166 | ||
167 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) { | |
168 | /* guest should be not configuring an isolated device */ | |
169 | DPRINTFN("drc: %x, set_configured: skipping isolated device", | |
170 | get_index(drc)); | |
171 | return; | |
172 | } | |
173 | drc->configured = true; | |
174 | } | |
175 | ||
176 | /* | |
177 | * dr-entity-sense sensor value | |
178 | * returned via get-sensor-state RTAS calls | |
179 | * as expected by state diagram in PAPR+ 2.7, 13.4 | |
180 | * based on the current allocation/indicator/power states | |
181 | * for the DR connector. | |
182 | */ | |
0cb688d2 | 183 | static uint32_t entity_sense(sPAPRDRConnector *drc, sPAPRDREntitySense *state) |
bbf5c878 | 184 | { |
bbf5c878 MR |
185 | if (drc->dev) { |
186 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
187 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
188 | /* for logical DR, we return a state of UNUSABLE | |
189 | * iff the allocation state UNUSABLE. | |
190 | * Otherwise, report the state as USABLE/PRESENT, | |
191 | * as we would for PCI. | |
192 | */ | |
0cb688d2 | 193 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
194 | } else { |
195 | /* this assumes all PCI devices are assigned to | |
196 | * a 'live insertion' power domain, where QEMU | |
197 | * manages power state automatically as opposed | |
198 | * to the guest. present, non-PCI resources are | |
199 | * unaffected by power state. | |
200 | */ | |
0cb688d2 | 201 | *state = SPAPR_DR_ENTITY_SENSE_PRESENT; |
bbf5c878 MR |
202 | } |
203 | } else { | |
204 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
205 | /* PCI devices, and only PCI devices, use EMPTY | |
206 | * in cases where we'd otherwise use UNUSABLE | |
207 | */ | |
0cb688d2 | 208 | *state = SPAPR_DR_ENTITY_SENSE_EMPTY; |
bbf5c878 | 209 | } else { |
0cb688d2 | 210 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
211 | } |
212 | } | |
213 | ||
214 | DPRINTFN("drc: %x, entity_sense: %x", get_index(drc), state); | |
0cb688d2 | 215 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
216 | } |
217 | ||
d7bce999 EB |
218 | static void prop_get_index(Object *obj, Visitor *v, const char *name, |
219 | void *opaque, Error **errp) | |
bbf5c878 MR |
220 | { |
221 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
222 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
223 | uint32_t value = (uint32_t)drck->get_index(drc); | |
51e72bc1 | 224 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
225 | } |
226 | ||
d7bce999 EB |
227 | static void prop_get_type(Object *obj, Visitor *v, const char *name, |
228 | void *opaque, Error **errp) | |
bbf5c878 MR |
229 | { |
230 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
231 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
232 | uint32_t value = (uint32_t)drck->get_type(drc); | |
51e72bc1 | 233 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
234 | } |
235 | ||
236 | static char *prop_get_name(Object *obj, Error **errp) | |
237 | { | |
238 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
239 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
240 | return g_strdup(drck->get_name(drc)); | |
241 | } | |
242 | ||
d7bce999 EB |
243 | static void prop_get_entity_sense(Object *obj, Visitor *v, const char *name, |
244 | void *opaque, Error **errp) | |
bbf5c878 MR |
245 | { |
246 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
247 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
0cb688d2 MR |
248 | uint32_t value; |
249 | ||
250 | drck->entity_sense(drc, &value); | |
51e72bc1 | 251 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
252 | } |
253 | ||
d7bce999 EB |
254 | static void prop_get_fdt(Object *obj, Visitor *v, const char *name, |
255 | void *opaque, Error **errp) | |
bbf5c878 MR |
256 | { |
257 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
c75304a1 | 258 | Error *err = NULL; |
bbf5c878 MR |
259 | int fdt_offset_next, fdt_offset, fdt_depth; |
260 | void *fdt; | |
261 | ||
262 | if (!drc->fdt) { | |
337283df | 263 | visit_start_struct(v, name, NULL, 0, &err); |
ab8bf1d7 MA |
264 | if (!err) { |
265 | visit_end_struct(v, &err); | |
266 | } | |
267 | error_propagate(errp, err); | |
bbf5c878 MR |
268 | return; |
269 | } | |
270 | ||
271 | fdt = drc->fdt; | |
272 | fdt_offset = drc->fdt_start_offset; | |
273 | fdt_depth = 0; | |
274 | ||
275 | do { | |
276 | const char *name = NULL; | |
277 | const struct fdt_property *prop = NULL; | |
278 | int prop_len = 0, name_len = 0; | |
279 | uint32_t tag; | |
280 | ||
281 | tag = fdt_next_tag(fdt, fdt_offset, &fdt_offset_next); | |
282 | switch (tag) { | |
283 | case FDT_BEGIN_NODE: | |
284 | fdt_depth++; | |
285 | name = fdt_get_name(fdt, fdt_offset, &name_len); | |
337283df | 286 | visit_start_struct(v, name, NULL, 0, &err); |
c75304a1 MA |
287 | if (err) { |
288 | error_propagate(errp, err); | |
289 | return; | |
290 | } | |
bbf5c878 MR |
291 | break; |
292 | case FDT_END_NODE: | |
293 | /* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */ | |
294 | g_assert(fdt_depth > 0); | |
c75304a1 MA |
295 | visit_end_struct(v, &err); |
296 | if (err) { | |
297 | error_propagate(errp, err); | |
298 | return; | |
299 | } | |
bbf5c878 MR |
300 | fdt_depth--; |
301 | break; | |
302 | case FDT_PROP: { | |
303 | int i; | |
304 | prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len); | |
305 | name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff)); | |
c75304a1 MA |
306 | visit_start_list(v, name, &err); |
307 | if (err) { | |
308 | error_propagate(errp, err); | |
309 | return; | |
310 | } | |
bbf5c878 | 311 | for (i = 0; i < prop_len; i++) { |
51e72bc1 | 312 | visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err); |
c75304a1 MA |
313 | if (err) { |
314 | error_propagate(errp, err); | |
315 | return; | |
316 | } | |
317 | } | |
08f9541d | 318 | visit_end_list(v); |
bbf5c878 MR |
319 | break; |
320 | } | |
321 | default: | |
322 | error_setg(&error_abort, "device FDT in unexpected state: %d", tag); | |
323 | } | |
324 | fdt_offset = fdt_offset_next; | |
325 | } while (fdt_depth != 0); | |
326 | } | |
327 | ||
328 | static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt, | |
329 | int fdt_start_offset, bool coldplug, Error **errp) | |
330 | { | |
331 | DPRINTFN("drc: %x, attach", get_index(drc)); | |
332 | ||
333 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
334 | error_setg(errp, "an attached device is still awaiting release"); | |
335 | return; | |
336 | } | |
337 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
338 | g_assert(drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE); | |
339 | } | |
340 | g_assert(fdt || coldplug); | |
341 | ||
342 | /* NOTE: setting initial isolation state to UNISOLATED means we can't | |
343 | * detach unless guest has a userspace/kernel that moves this state | |
344 | * back to ISOLATED in response to an unplug event, or this is done | |
345 | * manually by the admin prior. if we force things while the guest | |
346 | * may be accessing the device, we can easily crash the guest, so we | |
347 | * we defer completion of removal in such cases to the reset() hook. | |
348 | */ | |
349 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
350 | drc->isolation_state = SPAPR_DR_ISOLATION_STATE_UNISOLATED; | |
351 | } | |
352 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_ACTIVE; | |
353 | ||
354 | drc->dev = d; | |
355 | drc->fdt = fdt; | |
356 | drc->fdt_start_offset = fdt_start_offset; | |
785652dc | 357 | drc->configured = coldplug; |
bbf5c878 MR |
358 | |
359 | object_property_add_link(OBJECT(drc), "device", | |
360 | object_get_typename(OBJECT(drc->dev)), | |
361 | (Object **)(&drc->dev), | |
362 | NULL, 0, NULL); | |
363 | } | |
364 | ||
365 | static void detach(sPAPRDRConnector *drc, DeviceState *d, | |
366 | spapr_drc_detach_cb *detach_cb, | |
367 | void *detach_cb_opaque, Error **errp) | |
368 | { | |
369 | DPRINTFN("drc: %x, detach", get_index(drc)); | |
370 | ||
371 | drc->detach_cb = detach_cb; | |
372 | drc->detach_cb_opaque = detach_cb_opaque; | |
373 | ||
374 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
375 | DPRINTFN("awaiting transition to isolated state before removal"); | |
376 | drc->awaiting_release = true; | |
377 | return; | |
378 | } | |
379 | ||
380 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
381 | drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
382 | DPRINTFN("awaiting transition to unusable state before removal"); | |
383 | drc->awaiting_release = true; | |
384 | return; | |
385 | } | |
386 | ||
387 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE; | |
388 | ||
389 | if (drc->detach_cb) { | |
390 | drc->detach_cb(drc->dev, drc->detach_cb_opaque); | |
391 | } | |
392 | ||
393 | drc->awaiting_release = false; | |
394 | g_free(drc->fdt); | |
395 | drc->fdt = NULL; | |
396 | drc->fdt_start_offset = 0; | |
397 | object_property_del(OBJECT(drc), "device", NULL); | |
398 | drc->dev = NULL; | |
399 | drc->detach_cb = NULL; | |
400 | drc->detach_cb_opaque = NULL; | |
401 | } | |
402 | ||
403 | static bool release_pending(sPAPRDRConnector *drc) | |
404 | { | |
405 | return drc->awaiting_release; | |
406 | } | |
407 | ||
408 | static void reset(DeviceState *d) | |
409 | { | |
410 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
411 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
412 | ||
413 | DPRINTFN("drc reset: %x", drck->get_index(drc)); | |
414 | /* immediately upon reset we can safely assume DRCs whose devices | |
415 | * are pending removal can be safely removed, and that they will | |
416 | * subsequently be left in an ISOLATED state. move the DRC to this | |
417 | * state in these cases (which will in turn complete any pending | |
418 | * device removals) | |
419 | */ | |
420 | if (drc->awaiting_release) { | |
421 | drck->set_isolation_state(drc, SPAPR_DR_ISOLATION_STATE_ISOLATED); | |
422 | /* generally this should also finalize the removal, but if the device | |
423 | * hasn't yet been configured we normally defer removal under the | |
424 | * assumption that this transition is taking place as part of device | |
425 | * configuration. so check if we're still waiting after this, and | |
426 | * force removal if we are | |
427 | */ | |
428 | if (drc->awaiting_release) { | |
429 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
430 | drc->detach_cb_opaque, NULL); | |
431 | } | |
432 | ||
433 | /* non-PCI devices may be awaiting a transition to UNUSABLE */ | |
434 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
435 | drc->awaiting_release) { | |
436 | drck->set_allocation_state(drc, SPAPR_DR_ALLOCATION_STATE_UNUSABLE); | |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | static void realize(DeviceState *d, Error **errp) | |
442 | { | |
443 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
444 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
445 | Object *root_container; | |
446 | char link_name[256]; | |
447 | gchar *child_name; | |
448 | Error *err = NULL; | |
449 | ||
450 | DPRINTFN("drc realize: %x", drck->get_index(drc)); | |
451 | /* NOTE: we do this as part of realize/unrealize due to the fact | |
452 | * that the guest will communicate with the DRC via RTAS calls | |
453 | * referencing the global DRC index. By unlinking the DRC | |
454 | * from DRC_CONTAINER_PATH/<drc_index> we effectively make it | |
455 | * inaccessible by the guest, since lookups rely on this path | |
456 | * existing in the composition tree | |
457 | */ | |
458 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
459 | snprintf(link_name, sizeof(link_name), "%x", drck->get_index(drc)); | |
460 | child_name = object_get_canonical_path_component(OBJECT(drc)); | |
461 | DPRINTFN("drc child name: %s", child_name); | |
462 | object_property_add_alias(root_container, link_name, | |
463 | drc->owner, child_name, &err); | |
464 | if (err) { | |
4fffeb5e | 465 | error_report_err(err); |
bbf5c878 MR |
466 | object_unref(OBJECT(drc)); |
467 | } | |
586d2142 | 468 | g_free(child_name); |
bbf5c878 MR |
469 | DPRINTFN("drc realize complete"); |
470 | } | |
471 | ||
472 | static void unrealize(DeviceState *d, Error **errp) | |
473 | { | |
474 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
475 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
476 | Object *root_container; | |
477 | char name[256]; | |
478 | Error *err = NULL; | |
479 | ||
480 | DPRINTFN("drc unrealize: %x", drck->get_index(drc)); | |
481 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
482 | snprintf(name, sizeof(name), "%x", drck->get_index(drc)); | |
483 | object_property_del(root_container, name, &err); | |
484 | if (err) { | |
4fffeb5e | 485 | error_report_err(err); |
bbf5c878 MR |
486 | object_unref(OBJECT(drc)); |
487 | } | |
488 | } | |
489 | ||
490 | sPAPRDRConnector *spapr_dr_connector_new(Object *owner, | |
491 | sPAPRDRConnectorType type, | |
492 | uint32_t id) | |
493 | { | |
494 | sPAPRDRConnector *drc = | |
495 | SPAPR_DR_CONNECTOR(object_new(TYPE_SPAPR_DR_CONNECTOR)); | |
94649d42 | 496 | char *prop_name; |
bbf5c878 MR |
497 | |
498 | g_assert(type); | |
499 | ||
500 | drc->type = type; | |
501 | drc->id = id; | |
502 | drc->owner = owner; | |
94649d42 DG |
503 | prop_name = g_strdup_printf("dr-connector[%"PRIu32"]", get_index(drc)); |
504 | object_property_add_child(owner, prop_name, OBJECT(drc), NULL); | |
bbf5c878 | 505 | object_property_set_bool(OBJECT(drc), true, "realized", NULL); |
94649d42 | 506 | g_free(prop_name); |
bbf5c878 MR |
507 | |
508 | /* human-readable name for a DRC to encode into the DT | |
509 | * description. this is mainly only used within a guest in place | |
510 | * of the unique DRC index. | |
511 | * | |
512 | * in the case of VIO/PCI devices, it corresponds to a | |
513 | * "location code" that maps a logical device/function (DRC index) | |
514 | * to a physical (or virtual in the case of VIO) location in the | |
515 | * system by chaining together the "location label" for each | |
516 | * encapsulating component. | |
517 | * | |
518 | * since this is more to do with diagnosing physical hardware | |
519 | * issues than guest compatibility, we choose location codes/DRC | |
520 | * names that adhere to the documented format, but avoid encoding | |
521 | * the entire topology information into the label/code, instead | |
522 | * just using the location codes based on the labels for the | |
523 | * endpoints (VIO/PCI adaptor connectors), which is basically | |
524 | * just "C" followed by an integer ID. | |
525 | * | |
526 | * DRC names as documented by PAPR+ v2.7, 13.5.2.4 | |
527 | * location codes as documented by PAPR+ v2.7, 12.3.1.5 | |
528 | */ | |
529 | switch (drc->type) { | |
530 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
531 | drc->name = g_strdup_printf("CPU %d", id); | |
532 | break; | |
533 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
534 | drc->name = g_strdup_printf("PHB %d", id); | |
535 | break; | |
536 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
537 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
538 | drc->name = g_strdup_printf("C%d", id); | |
539 | break; | |
540 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
541 | drc->name = g_strdup_printf("LMB %d", id); | |
542 | break; | |
543 | default: | |
544 | g_assert(false); | |
545 | } | |
546 | ||
547 | /* PCI slot always start in a USABLE state, and stay there */ | |
548 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
549 | drc->allocation_state = SPAPR_DR_ALLOCATION_STATE_USABLE; | |
550 | } | |
551 | ||
552 | return drc; | |
553 | } | |
554 | ||
555 | static void spapr_dr_connector_instance_init(Object *obj) | |
556 | { | |
557 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
558 | ||
559 | object_property_add_uint32_ptr(obj, "isolation-state", | |
560 | &drc->isolation_state, NULL); | |
561 | object_property_add_uint32_ptr(obj, "indicator-state", | |
562 | &drc->indicator_state, NULL); | |
563 | object_property_add_uint32_ptr(obj, "allocation-state", | |
564 | &drc->allocation_state, NULL); | |
565 | object_property_add_uint32_ptr(obj, "id", &drc->id, NULL); | |
566 | object_property_add(obj, "index", "uint32", prop_get_index, | |
567 | NULL, NULL, NULL, NULL); | |
568 | object_property_add(obj, "connector_type", "uint32", prop_get_type, | |
569 | NULL, NULL, NULL, NULL); | |
570 | object_property_add_str(obj, "name", prop_get_name, NULL, NULL); | |
571 | object_property_add(obj, "entity-sense", "uint32", prop_get_entity_sense, | |
572 | NULL, NULL, NULL, NULL); | |
573 | object_property_add(obj, "fdt", "struct", prop_get_fdt, | |
574 | NULL, NULL, NULL, NULL); | |
575 | } | |
576 | ||
577 | static void spapr_dr_connector_class_init(ObjectClass *k, void *data) | |
578 | { | |
579 | DeviceClass *dk = DEVICE_CLASS(k); | |
580 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k); | |
581 | ||
582 | dk->reset = reset; | |
583 | dk->realize = realize; | |
584 | dk->unrealize = unrealize; | |
585 | drck->set_isolation_state = set_isolation_state; | |
586 | drck->set_indicator_state = set_indicator_state; | |
587 | drck->set_allocation_state = set_allocation_state; | |
588 | drck->get_index = get_index; | |
589 | drck->get_type = get_type; | |
590 | drck->get_name = get_name; | |
591 | drck->get_fdt = get_fdt; | |
592 | drck->set_configured = set_configured; | |
593 | drck->entity_sense = entity_sense; | |
594 | drck->attach = attach; | |
595 | drck->detach = detach; | |
596 | drck->release_pending = release_pending; | |
c401ae8c MA |
597 | /* |
598 | * Reason: it crashes FIXME find and document the real reason | |
599 | */ | |
600 | dk->cannot_instantiate_with_device_add_yet = true; | |
bbf5c878 MR |
601 | } |
602 | ||
603 | static const TypeInfo spapr_dr_connector_info = { | |
604 | .name = TYPE_SPAPR_DR_CONNECTOR, | |
605 | .parent = TYPE_DEVICE, | |
606 | .instance_size = sizeof(sPAPRDRConnector), | |
607 | .instance_init = spapr_dr_connector_instance_init, | |
608 | .class_size = sizeof(sPAPRDRConnectorClass), | |
609 | .class_init = spapr_dr_connector_class_init, | |
610 | }; | |
611 | ||
612 | static void spapr_drc_register_types(void) | |
613 | { | |
614 | type_register_static(&spapr_dr_connector_info); | |
615 | } | |
616 | ||
617 | type_init(spapr_drc_register_types) | |
618 | ||
619 | /* helper functions for external users */ | |
620 | ||
621 | sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index) | |
622 | { | |
623 | Object *obj; | |
624 | char name[256]; | |
625 | ||
626 | snprintf(name, sizeof(name), "%s/%x", DRC_CONTAINER_PATH, index); | |
627 | obj = object_resolve_path(name, NULL); | |
628 | ||
629 | return !obj ? NULL : SPAPR_DR_CONNECTOR(obj); | |
630 | } | |
631 | ||
632 | sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, | |
633 | uint32_t id) | |
634 | { | |
635 | return spapr_dr_connector_by_index( | |
636 | (get_type_shift(type) << DRC_INDEX_TYPE_SHIFT) | | |
637 | (id & DRC_INDEX_ID_MASK)); | |
638 | } | |
e4b798bb MR |
639 | |
640 | /* generate a string the describes the DRC to encode into the | |
641 | * device tree. | |
642 | * | |
643 | * as documented by PAPR+ v2.7, 13.5.2.6 and C.6.1 | |
644 | */ | |
645 | static const char *spapr_drc_get_type_str(sPAPRDRConnectorType type) | |
646 | { | |
647 | switch (type) { | |
648 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
649 | return "CPU"; | |
650 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
651 | return "PHB"; | |
652 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
653 | return "SLOT"; | |
654 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
655 | return "28"; | |
656 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
657 | return "MEM"; | |
658 | default: | |
659 | g_assert(false); | |
660 | } | |
661 | ||
662 | return NULL; | |
663 | } | |
664 | ||
665 | /** | |
666 | * spapr_drc_populate_dt | |
667 | * | |
668 | * @fdt: libfdt device tree | |
669 | * @path: path in the DT to generate properties | |
670 | * @owner: parent Object/DeviceState for which to generate DRC | |
671 | * descriptions for | |
672 | * @drc_type_mask: mask of sPAPRDRConnectorType values corresponding | |
673 | * to the types of DRCs to generate entries for | |
674 | * | |
675 | * generate OF properties to describe DRC topology/indices to guests | |
676 | * | |
677 | * as documented in PAPR+ v2.1, 13.5.2 | |
678 | */ | |
679 | int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner, | |
680 | uint32_t drc_type_mask) | |
681 | { | |
682 | Object *root_container; | |
683 | ObjectProperty *prop; | |
7746abd8 | 684 | ObjectPropertyIterator iter; |
e4b798bb MR |
685 | uint32_t drc_count = 0; |
686 | GArray *drc_indexes, *drc_power_domains; | |
687 | GString *drc_names, *drc_types; | |
688 | int ret; | |
689 | ||
690 | /* the first entry of each properties is a 32-bit integer encoding | |
691 | * the number of elements in the array. we won't know this until | |
692 | * we complete the iteration through all the matching DRCs, but | |
693 | * reserve the space now and set the offsets accordingly so we | |
694 | * can fill them in later. | |
695 | */ | |
696 | drc_indexes = g_array_new(false, true, sizeof(uint32_t)); | |
697 | drc_indexes = g_array_set_size(drc_indexes, 1); | |
698 | drc_power_domains = g_array_new(false, true, sizeof(uint32_t)); | |
699 | drc_power_domains = g_array_set_size(drc_power_domains, 1); | |
700 | drc_names = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
701 | drc_types = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
702 | ||
703 | /* aliases for all DRConnector objects will be rooted in QOM | |
704 | * composition tree at DRC_CONTAINER_PATH | |
705 | */ | |
706 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
707 | ||
7746abd8 DB |
708 | object_property_iter_init(&iter, root_container); |
709 | while ((prop = object_property_iter_next(&iter))) { | |
e4b798bb MR |
710 | Object *obj; |
711 | sPAPRDRConnector *drc; | |
712 | sPAPRDRConnectorClass *drck; | |
713 | uint32_t drc_index, drc_power_domain; | |
714 | ||
715 | if (!strstart(prop->type, "link<", NULL)) { | |
716 | continue; | |
717 | } | |
718 | ||
719 | obj = object_property_get_link(root_container, prop->name, NULL); | |
720 | drc = SPAPR_DR_CONNECTOR(obj); | |
721 | drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
722 | ||
723 | if (owner && (drc->owner != owner)) { | |
724 | continue; | |
725 | } | |
726 | ||
727 | if ((drc->type & drc_type_mask) == 0) { | |
728 | continue; | |
729 | } | |
730 | ||
731 | drc_count++; | |
732 | ||
733 | /* ibm,drc-indexes */ | |
734 | drc_index = cpu_to_be32(drck->get_index(drc)); | |
735 | g_array_append_val(drc_indexes, drc_index); | |
736 | ||
737 | /* ibm,drc-power-domains */ | |
738 | drc_power_domain = cpu_to_be32(-1); | |
739 | g_array_append_val(drc_power_domains, drc_power_domain); | |
740 | ||
741 | /* ibm,drc-names */ | |
742 | drc_names = g_string_append(drc_names, drck->get_name(drc)); | |
743 | drc_names = g_string_insert_len(drc_names, -1, "\0", 1); | |
744 | ||
745 | /* ibm,drc-types */ | |
746 | drc_types = g_string_append(drc_types, | |
747 | spapr_drc_get_type_str(drc->type)); | |
748 | drc_types = g_string_insert_len(drc_types, -1, "\0", 1); | |
749 | } | |
750 | ||
751 | /* now write the drc count into the space we reserved at the | |
752 | * beginning of the arrays previously | |
753 | */ | |
754 | *(uint32_t *)drc_indexes->data = cpu_to_be32(drc_count); | |
755 | *(uint32_t *)drc_power_domains->data = cpu_to_be32(drc_count); | |
756 | *(uint32_t *)drc_names->str = cpu_to_be32(drc_count); | |
757 | *(uint32_t *)drc_types->str = cpu_to_be32(drc_count); | |
758 | ||
759 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-indexes", | |
760 | drc_indexes->data, | |
761 | drc_indexes->len * sizeof(uint32_t)); | |
762 | if (ret) { | |
763 | fprintf(stderr, "Couldn't create ibm,drc-indexes property\n"); | |
764 | goto out; | |
765 | } | |
766 | ||
767 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-power-domains", | |
768 | drc_power_domains->data, | |
769 | drc_power_domains->len * sizeof(uint32_t)); | |
770 | if (ret) { | |
771 | fprintf(stderr, "Couldn't finalize ibm,drc-power-domains property\n"); | |
772 | goto out; | |
773 | } | |
774 | ||
775 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-names", | |
776 | drc_names->str, drc_names->len); | |
777 | if (ret) { | |
778 | fprintf(stderr, "Couldn't finalize ibm,drc-names property\n"); | |
779 | goto out; | |
780 | } | |
781 | ||
782 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-types", | |
783 | drc_types->str, drc_types->len); | |
784 | if (ret) { | |
785 | fprintf(stderr, "Couldn't finalize ibm,drc-types property\n"); | |
786 | goto out; | |
787 | } | |
788 | ||
789 | out: | |
790 | g_array_free(drc_indexes, true); | |
791 | g_array_free(drc_power_domains, true); | |
792 | g_string_free(drc_names, true); | |
793 | g_string_free(drc_types, true); | |
794 | ||
795 | return ret; | |
796 | } |