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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" |
da34e65c | 14 | #include "qapi/error.h" |
bbf5c878 MR |
15 | #include "hw/ppc/spapr_drc.h" |
16 | #include "qom/object.h" | |
17 | #include "hw/qdev.h" | |
18 | #include "qapi/visitor.h" | |
19 | #include "qemu/error-report.h" | |
0cb688d2 | 20 | #include "hw/ppc/spapr.h" /* for RTAS return codes */ |
bbf5c878 MR |
21 | |
22 | /* #define DEBUG_SPAPR_DRC */ | |
23 | ||
24 | #ifdef DEBUG_SPAPR_DRC | |
25 | #define DPRINTF(fmt, ...) \ | |
26 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
27 | #define DPRINTFN(fmt, ...) \ | |
28 | do { DPRINTF(fmt, ## __VA_ARGS__); fprintf(stderr, "\n"); } while (0) | |
29 | #else | |
30 | #define DPRINTF(fmt, ...) \ | |
31 | do { } while (0) | |
32 | #define DPRINTFN(fmt, ...) \ | |
33 | do { } while (0) | |
34 | #endif | |
35 | ||
36 | #define DRC_CONTAINER_PATH "/dr-connector" | |
37 | #define DRC_INDEX_TYPE_SHIFT 28 | |
627c2ef7 | 38 | #define DRC_INDEX_ID_MASK ((1ULL << DRC_INDEX_TYPE_SHIFT) - 1) |
bbf5c878 MR |
39 | |
40 | static sPAPRDRConnectorTypeShift get_type_shift(sPAPRDRConnectorType type) | |
41 | { | |
42 | uint32_t shift = 0; | |
43 | ||
44 | /* make sure this isn't SPAPR_DR_CONNECTOR_TYPE_ANY, or some | |
45 | * other wonky value. | |
46 | */ | |
47 | g_assert(is_power_of_2(type)); | |
48 | ||
49 | while (type != (1 << shift)) { | |
50 | shift++; | |
51 | } | |
52 | return shift; | |
53 | } | |
54 | ||
55 | static uint32_t get_index(sPAPRDRConnector *drc) | |
56 | { | |
57 | /* no set format for a drc index: it only needs to be globally | |
58 | * unique. this is how we encode the DRC type on bare-metal | |
59 | * however, so might as well do that here | |
60 | */ | |
61 | return (get_type_shift(drc->type) << DRC_INDEX_TYPE_SHIFT) | | |
62 | (drc->id & DRC_INDEX_ID_MASK); | |
63 | } | |
64 | ||
0cb688d2 MR |
65 | static uint32_t set_isolation_state(sPAPRDRConnector *drc, |
66 | sPAPRDRIsolationState state) | |
bbf5c878 MR |
67 | { |
68 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
69 | ||
70 | DPRINTFN("drc: %x, set_isolation_state: %x", get_index(drc), state); | |
71 | ||
9d1852ce MR |
72 | if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) { |
73 | /* cannot unisolate a non-existant resource, and, or resources | |
74 | * which are in an 'UNUSABLE' allocation state. (PAPR 2.7, 13.5.3.5) | |
75 | */ | |
76 | if (!drc->dev || | |
77 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
78 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
79 | } | |
80 | } | |
81 | ||
bbf5c878 MR |
82 | drc->isolation_state = state; |
83 | ||
84 | if (drc->isolation_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
85 | /* if we're awaiting release, but still in an unconfigured state, | |
86 | * it's likely the guest is still in the process of configuring | |
87 | * the device and is transitioning the devices to an ISOLATED | |
88 | * state as a part of that process. so we only complete the | |
89 | * removal when this transition happens for a device in a | |
90 | * configured state, as suggested by the state diagram from | |
91 | * PAPR+ 2.7, 13.4 | |
92 | */ | |
93 | if (drc->awaiting_release) { | |
94 | if (drc->configured) { | |
95 | DPRINTFN("finalizing device removal"); | |
96 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
97 | drc->detach_cb_opaque, NULL); | |
98 | } else { | |
99 | DPRINTFN("deferring device removal on unconfigured device\n"); | |
100 | } | |
101 | } | |
102 | drc->configured = false; | |
103 | } | |
104 | ||
0cb688d2 | 105 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
106 | } |
107 | ||
0cb688d2 MR |
108 | static uint32_t set_indicator_state(sPAPRDRConnector *drc, |
109 | sPAPRDRIndicatorState state) | |
bbf5c878 MR |
110 | { |
111 | DPRINTFN("drc: %x, set_indicator_state: %x", get_index(drc), state); | |
112 | drc->indicator_state = state; | |
0cb688d2 | 113 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
114 | } |
115 | ||
0cb688d2 MR |
116 | static uint32_t set_allocation_state(sPAPRDRConnector *drc, |
117 | sPAPRDRAllocationState state) | |
bbf5c878 MR |
118 | { |
119 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
120 | ||
121 | DPRINTFN("drc: %x, set_allocation_state: %x", get_index(drc), state); | |
122 | ||
9d1852ce MR |
123 | if (state == SPAPR_DR_ALLOCATION_STATE_USABLE) { |
124 | /* if there's no resource/device associated with the DRC, there's | |
125 | * no way for us to put it in an allocation state consistent with | |
126 | * being 'USABLE'. PAPR 2.7, 13.5.3.4 documents that this should | |
127 | * result in an RTAS return code of -3 / "no such indicator" | |
128 | */ | |
129 | if (!drc->dev) { | |
130 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
131 | } | |
132 | } | |
133 | ||
bbf5c878 MR |
134 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) { |
135 | drc->allocation_state = state; | |
136 | if (drc->awaiting_release && | |
137 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
138 | DPRINTFN("finalizing device removal"); | |
139 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
140 | drc->detach_cb_opaque, NULL); | |
141 | } | |
142 | } | |
0cb688d2 | 143 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
144 | } |
145 | ||
146 | static uint32_t get_type(sPAPRDRConnector *drc) | |
147 | { | |
148 | return drc->type; | |
149 | } | |
150 | ||
151 | static const char *get_name(sPAPRDRConnector *drc) | |
152 | { | |
153 | return drc->name; | |
154 | } | |
155 | ||
156 | static const void *get_fdt(sPAPRDRConnector *drc, int *fdt_start_offset) | |
157 | { | |
158 | if (fdt_start_offset) { | |
159 | *fdt_start_offset = drc->fdt_start_offset; | |
160 | } | |
161 | return drc->fdt; | |
162 | } | |
163 | ||
164 | static void set_configured(sPAPRDRConnector *drc) | |
165 | { | |
166 | DPRINTFN("drc: %x, set_configured", get_index(drc)); | |
167 | ||
168 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) { | |
169 | /* guest should be not configuring an isolated device */ | |
170 | DPRINTFN("drc: %x, set_configured: skipping isolated device", | |
171 | get_index(drc)); | |
172 | return; | |
173 | } | |
174 | drc->configured = true; | |
175 | } | |
176 | ||
177 | /* | |
178 | * dr-entity-sense sensor value | |
179 | * returned via get-sensor-state RTAS calls | |
180 | * as expected by state diagram in PAPR+ 2.7, 13.4 | |
181 | * based on the current allocation/indicator/power states | |
182 | * for the DR connector. | |
183 | */ | |
0cb688d2 | 184 | static uint32_t entity_sense(sPAPRDRConnector *drc, sPAPRDREntitySense *state) |
bbf5c878 | 185 | { |
bbf5c878 MR |
186 | if (drc->dev) { |
187 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
188 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
189 | /* for logical DR, we return a state of UNUSABLE | |
190 | * iff the allocation state UNUSABLE. | |
191 | * Otherwise, report the state as USABLE/PRESENT, | |
192 | * as we would for PCI. | |
193 | */ | |
0cb688d2 | 194 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
195 | } else { |
196 | /* this assumes all PCI devices are assigned to | |
197 | * a 'live insertion' power domain, where QEMU | |
198 | * manages power state automatically as opposed | |
199 | * to the guest. present, non-PCI resources are | |
200 | * unaffected by power state. | |
201 | */ | |
0cb688d2 | 202 | *state = SPAPR_DR_ENTITY_SENSE_PRESENT; |
bbf5c878 MR |
203 | } |
204 | } else { | |
205 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
206 | /* PCI devices, and only PCI devices, use EMPTY | |
207 | * in cases where we'd otherwise use UNUSABLE | |
208 | */ | |
0cb688d2 | 209 | *state = SPAPR_DR_ENTITY_SENSE_EMPTY; |
bbf5c878 | 210 | } else { |
0cb688d2 | 211 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
212 | } |
213 | } | |
214 | ||
215 | DPRINTFN("drc: %x, entity_sense: %x", get_index(drc), state); | |
0cb688d2 | 216 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
217 | } |
218 | ||
d7bce999 EB |
219 | static void prop_get_index(Object *obj, Visitor *v, const char *name, |
220 | void *opaque, Error **errp) | |
bbf5c878 MR |
221 | { |
222 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
223 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
224 | uint32_t value = (uint32_t)drck->get_index(drc); | |
51e72bc1 | 225 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
226 | } |
227 | ||
d7bce999 EB |
228 | static void prop_get_type(Object *obj, Visitor *v, const char *name, |
229 | void *opaque, Error **errp) | |
bbf5c878 MR |
230 | { |
231 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
232 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
233 | uint32_t value = (uint32_t)drck->get_type(drc); | |
51e72bc1 | 234 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
235 | } |
236 | ||
237 | static char *prop_get_name(Object *obj, Error **errp) | |
238 | { | |
239 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
240 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
241 | return g_strdup(drck->get_name(drc)); | |
242 | } | |
243 | ||
d7bce999 EB |
244 | static void prop_get_entity_sense(Object *obj, Visitor *v, const char *name, |
245 | void *opaque, Error **errp) | |
bbf5c878 MR |
246 | { |
247 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
248 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
0cb688d2 MR |
249 | uint32_t value; |
250 | ||
251 | drck->entity_sense(drc, &value); | |
51e72bc1 | 252 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
253 | } |
254 | ||
d7bce999 EB |
255 | static void prop_get_fdt(Object *obj, Visitor *v, const char *name, |
256 | void *opaque, Error **errp) | |
bbf5c878 MR |
257 | { |
258 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
c75304a1 | 259 | Error *err = NULL; |
bbf5c878 MR |
260 | int fdt_offset_next, fdt_offset, fdt_depth; |
261 | void *fdt; | |
262 | ||
263 | if (!drc->fdt) { | |
337283df | 264 | visit_start_struct(v, name, NULL, 0, &err); |
ab8bf1d7 MA |
265 | if (!err) { |
266 | visit_end_struct(v, &err); | |
267 | } | |
268 | error_propagate(errp, err); | |
bbf5c878 MR |
269 | return; |
270 | } | |
271 | ||
272 | fdt = drc->fdt; | |
273 | fdt_offset = drc->fdt_start_offset; | |
274 | fdt_depth = 0; | |
275 | ||
276 | do { | |
277 | const char *name = NULL; | |
278 | const struct fdt_property *prop = NULL; | |
279 | int prop_len = 0, name_len = 0; | |
280 | uint32_t tag; | |
281 | ||
282 | tag = fdt_next_tag(fdt, fdt_offset, &fdt_offset_next); | |
283 | switch (tag) { | |
284 | case FDT_BEGIN_NODE: | |
285 | fdt_depth++; | |
286 | name = fdt_get_name(fdt, fdt_offset, &name_len); | |
337283df | 287 | visit_start_struct(v, name, NULL, 0, &err); |
c75304a1 MA |
288 | if (err) { |
289 | error_propagate(errp, err); | |
290 | return; | |
291 | } | |
bbf5c878 MR |
292 | break; |
293 | case FDT_END_NODE: | |
294 | /* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */ | |
295 | g_assert(fdt_depth > 0); | |
c75304a1 MA |
296 | visit_end_struct(v, &err); |
297 | if (err) { | |
298 | error_propagate(errp, err); | |
299 | return; | |
300 | } | |
bbf5c878 MR |
301 | fdt_depth--; |
302 | break; | |
303 | case FDT_PROP: { | |
304 | int i; | |
305 | prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len); | |
306 | name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff)); | |
c75304a1 MA |
307 | visit_start_list(v, name, &err); |
308 | if (err) { | |
309 | error_propagate(errp, err); | |
310 | return; | |
311 | } | |
bbf5c878 | 312 | for (i = 0; i < prop_len; i++) { |
51e72bc1 | 313 | visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err); |
c75304a1 MA |
314 | if (err) { |
315 | error_propagate(errp, err); | |
316 | return; | |
317 | } | |
318 | } | |
08f9541d | 319 | visit_end_list(v); |
bbf5c878 MR |
320 | break; |
321 | } | |
322 | default: | |
323 | error_setg(&error_abort, "device FDT in unexpected state: %d", tag); | |
324 | } | |
325 | fdt_offset = fdt_offset_next; | |
326 | } while (fdt_depth != 0); | |
327 | } | |
328 | ||
329 | static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt, | |
330 | int fdt_start_offset, bool coldplug, Error **errp) | |
331 | { | |
332 | DPRINTFN("drc: %x, attach", get_index(drc)); | |
333 | ||
334 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
335 | error_setg(errp, "an attached device is still awaiting release"); | |
336 | return; | |
337 | } | |
338 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
339 | g_assert(drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE); | |
340 | } | |
341 | g_assert(fdt || coldplug); | |
342 | ||
343 | /* NOTE: setting initial isolation state to UNISOLATED means we can't | |
344 | * detach unless guest has a userspace/kernel that moves this state | |
345 | * back to ISOLATED in response to an unplug event, or this is done | |
346 | * manually by the admin prior. if we force things while the guest | |
347 | * may be accessing the device, we can easily crash the guest, so we | |
348 | * we defer completion of removal in such cases to the reset() hook. | |
349 | */ | |
350 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
351 | drc->isolation_state = SPAPR_DR_ISOLATION_STATE_UNISOLATED; | |
352 | } | |
353 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_ACTIVE; | |
354 | ||
355 | drc->dev = d; | |
356 | drc->fdt = fdt; | |
357 | drc->fdt_start_offset = fdt_start_offset; | |
785652dc | 358 | drc->configured = coldplug; |
bbf5c878 MR |
359 | |
360 | object_property_add_link(OBJECT(drc), "device", | |
361 | object_get_typename(OBJECT(drc->dev)), | |
362 | (Object **)(&drc->dev), | |
363 | NULL, 0, NULL); | |
364 | } | |
365 | ||
366 | static void detach(sPAPRDRConnector *drc, DeviceState *d, | |
367 | spapr_drc_detach_cb *detach_cb, | |
368 | void *detach_cb_opaque, Error **errp) | |
369 | { | |
370 | DPRINTFN("drc: %x, detach", get_index(drc)); | |
371 | ||
372 | drc->detach_cb = detach_cb; | |
373 | drc->detach_cb_opaque = detach_cb_opaque; | |
374 | ||
375 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
376 | DPRINTFN("awaiting transition to isolated state before removal"); | |
377 | drc->awaiting_release = true; | |
378 | return; | |
379 | } | |
380 | ||
381 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
382 | drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
383 | DPRINTFN("awaiting transition to unusable state before removal"); | |
384 | drc->awaiting_release = true; | |
385 | return; | |
386 | } | |
387 | ||
388 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE; | |
389 | ||
390 | if (drc->detach_cb) { | |
391 | drc->detach_cb(drc->dev, drc->detach_cb_opaque); | |
392 | } | |
393 | ||
394 | drc->awaiting_release = false; | |
395 | g_free(drc->fdt); | |
396 | drc->fdt = NULL; | |
397 | drc->fdt_start_offset = 0; | |
398 | object_property_del(OBJECT(drc), "device", NULL); | |
399 | drc->dev = NULL; | |
400 | drc->detach_cb = NULL; | |
401 | drc->detach_cb_opaque = NULL; | |
402 | } | |
403 | ||
404 | static bool release_pending(sPAPRDRConnector *drc) | |
405 | { | |
406 | return drc->awaiting_release; | |
407 | } | |
408 | ||
409 | static void reset(DeviceState *d) | |
410 | { | |
411 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
412 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
413 | ||
414 | DPRINTFN("drc reset: %x", drck->get_index(drc)); | |
415 | /* immediately upon reset we can safely assume DRCs whose devices | |
416 | * are pending removal can be safely removed, and that they will | |
417 | * subsequently be left in an ISOLATED state. move the DRC to this | |
418 | * state in these cases (which will in turn complete any pending | |
419 | * device removals) | |
420 | */ | |
421 | if (drc->awaiting_release) { | |
422 | drck->set_isolation_state(drc, SPAPR_DR_ISOLATION_STATE_ISOLATED); | |
423 | /* generally this should also finalize the removal, but if the device | |
424 | * hasn't yet been configured we normally defer removal under the | |
425 | * assumption that this transition is taking place as part of device | |
426 | * configuration. so check if we're still waiting after this, and | |
427 | * force removal if we are | |
428 | */ | |
429 | if (drc->awaiting_release) { | |
430 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
431 | drc->detach_cb_opaque, NULL); | |
432 | } | |
433 | ||
434 | /* non-PCI devices may be awaiting a transition to UNUSABLE */ | |
435 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
436 | drc->awaiting_release) { | |
437 | drck->set_allocation_state(drc, SPAPR_DR_ALLOCATION_STATE_UNUSABLE); | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | static void realize(DeviceState *d, Error **errp) | |
443 | { | |
444 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
445 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
446 | Object *root_container; | |
447 | char link_name[256]; | |
448 | gchar *child_name; | |
449 | Error *err = NULL; | |
450 | ||
451 | DPRINTFN("drc realize: %x", drck->get_index(drc)); | |
452 | /* NOTE: we do this as part of realize/unrealize due to the fact | |
453 | * that the guest will communicate with the DRC via RTAS calls | |
454 | * referencing the global DRC index. By unlinking the DRC | |
455 | * from DRC_CONTAINER_PATH/<drc_index> we effectively make it | |
456 | * inaccessible by the guest, since lookups rely on this path | |
457 | * existing in the composition tree | |
458 | */ | |
459 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
460 | snprintf(link_name, sizeof(link_name), "%x", drck->get_index(drc)); | |
461 | child_name = object_get_canonical_path_component(OBJECT(drc)); | |
462 | DPRINTFN("drc child name: %s", child_name); | |
463 | object_property_add_alias(root_container, link_name, | |
464 | drc->owner, child_name, &err); | |
465 | if (err) { | |
4fffeb5e | 466 | error_report_err(err); |
bbf5c878 MR |
467 | object_unref(OBJECT(drc)); |
468 | } | |
586d2142 | 469 | g_free(child_name); |
bbf5c878 MR |
470 | DPRINTFN("drc realize complete"); |
471 | } | |
472 | ||
473 | static void unrealize(DeviceState *d, Error **errp) | |
474 | { | |
475 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
476 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
477 | Object *root_container; | |
478 | char name[256]; | |
479 | Error *err = NULL; | |
480 | ||
481 | DPRINTFN("drc unrealize: %x", drck->get_index(drc)); | |
482 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
483 | snprintf(name, sizeof(name), "%x", drck->get_index(drc)); | |
484 | object_property_del(root_container, name, &err); | |
485 | if (err) { | |
4fffeb5e | 486 | error_report_err(err); |
bbf5c878 MR |
487 | object_unref(OBJECT(drc)); |
488 | } | |
489 | } | |
490 | ||
491 | sPAPRDRConnector *spapr_dr_connector_new(Object *owner, | |
492 | sPAPRDRConnectorType type, | |
493 | uint32_t id) | |
494 | { | |
495 | sPAPRDRConnector *drc = | |
496 | SPAPR_DR_CONNECTOR(object_new(TYPE_SPAPR_DR_CONNECTOR)); | |
94649d42 | 497 | char *prop_name; |
bbf5c878 MR |
498 | |
499 | g_assert(type); | |
500 | ||
501 | drc->type = type; | |
502 | drc->id = id; | |
503 | drc->owner = owner; | |
94649d42 DG |
504 | prop_name = g_strdup_printf("dr-connector[%"PRIu32"]", get_index(drc)); |
505 | object_property_add_child(owner, prop_name, OBJECT(drc), NULL); | |
bbf5c878 | 506 | object_property_set_bool(OBJECT(drc), true, "realized", NULL); |
94649d42 | 507 | g_free(prop_name); |
bbf5c878 MR |
508 | |
509 | /* human-readable name for a DRC to encode into the DT | |
510 | * description. this is mainly only used within a guest in place | |
511 | * of the unique DRC index. | |
512 | * | |
513 | * in the case of VIO/PCI devices, it corresponds to a | |
514 | * "location code" that maps a logical device/function (DRC index) | |
515 | * to a physical (or virtual in the case of VIO) location in the | |
516 | * system by chaining together the "location label" for each | |
517 | * encapsulating component. | |
518 | * | |
519 | * since this is more to do with diagnosing physical hardware | |
520 | * issues than guest compatibility, we choose location codes/DRC | |
521 | * names that adhere to the documented format, but avoid encoding | |
522 | * the entire topology information into the label/code, instead | |
523 | * just using the location codes based on the labels for the | |
524 | * endpoints (VIO/PCI adaptor connectors), which is basically | |
525 | * just "C" followed by an integer ID. | |
526 | * | |
527 | * DRC names as documented by PAPR+ v2.7, 13.5.2.4 | |
528 | * location codes as documented by PAPR+ v2.7, 12.3.1.5 | |
529 | */ | |
530 | switch (drc->type) { | |
531 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
532 | drc->name = g_strdup_printf("CPU %d", id); | |
533 | break; | |
534 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
535 | drc->name = g_strdup_printf("PHB %d", id); | |
536 | break; | |
537 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
538 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
539 | drc->name = g_strdup_printf("C%d", id); | |
540 | break; | |
541 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
542 | drc->name = g_strdup_printf("LMB %d", id); | |
543 | break; | |
544 | default: | |
545 | g_assert(false); | |
546 | } | |
547 | ||
548 | /* PCI slot always start in a USABLE state, and stay there */ | |
549 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
550 | drc->allocation_state = SPAPR_DR_ALLOCATION_STATE_USABLE; | |
551 | } | |
552 | ||
553 | return drc; | |
554 | } | |
555 | ||
556 | static void spapr_dr_connector_instance_init(Object *obj) | |
557 | { | |
558 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
559 | ||
560 | object_property_add_uint32_ptr(obj, "isolation-state", | |
561 | &drc->isolation_state, NULL); | |
562 | object_property_add_uint32_ptr(obj, "indicator-state", | |
563 | &drc->indicator_state, NULL); | |
564 | object_property_add_uint32_ptr(obj, "allocation-state", | |
565 | &drc->allocation_state, NULL); | |
566 | object_property_add_uint32_ptr(obj, "id", &drc->id, NULL); | |
567 | object_property_add(obj, "index", "uint32", prop_get_index, | |
568 | NULL, NULL, NULL, NULL); | |
569 | object_property_add(obj, "connector_type", "uint32", prop_get_type, | |
570 | NULL, NULL, NULL, NULL); | |
571 | object_property_add_str(obj, "name", prop_get_name, NULL, NULL); | |
572 | object_property_add(obj, "entity-sense", "uint32", prop_get_entity_sense, | |
573 | NULL, NULL, NULL, NULL); | |
574 | object_property_add(obj, "fdt", "struct", prop_get_fdt, | |
575 | NULL, NULL, NULL, NULL); | |
576 | } | |
577 | ||
578 | static void spapr_dr_connector_class_init(ObjectClass *k, void *data) | |
579 | { | |
580 | DeviceClass *dk = DEVICE_CLASS(k); | |
581 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k); | |
582 | ||
583 | dk->reset = reset; | |
584 | dk->realize = realize; | |
585 | dk->unrealize = unrealize; | |
586 | drck->set_isolation_state = set_isolation_state; | |
587 | drck->set_indicator_state = set_indicator_state; | |
588 | drck->set_allocation_state = set_allocation_state; | |
589 | drck->get_index = get_index; | |
590 | drck->get_type = get_type; | |
591 | drck->get_name = get_name; | |
592 | drck->get_fdt = get_fdt; | |
593 | drck->set_configured = set_configured; | |
594 | drck->entity_sense = entity_sense; | |
595 | drck->attach = attach; | |
596 | drck->detach = detach; | |
597 | drck->release_pending = release_pending; | |
c401ae8c MA |
598 | /* |
599 | * Reason: it crashes FIXME find and document the real reason | |
600 | */ | |
601 | dk->cannot_instantiate_with_device_add_yet = true; | |
bbf5c878 MR |
602 | } |
603 | ||
604 | static const TypeInfo spapr_dr_connector_info = { | |
605 | .name = TYPE_SPAPR_DR_CONNECTOR, | |
606 | .parent = TYPE_DEVICE, | |
607 | .instance_size = sizeof(sPAPRDRConnector), | |
608 | .instance_init = spapr_dr_connector_instance_init, | |
609 | .class_size = sizeof(sPAPRDRConnectorClass), | |
610 | .class_init = spapr_dr_connector_class_init, | |
611 | }; | |
612 | ||
613 | static void spapr_drc_register_types(void) | |
614 | { | |
615 | type_register_static(&spapr_dr_connector_info); | |
616 | } | |
617 | ||
618 | type_init(spapr_drc_register_types) | |
619 | ||
620 | /* helper functions for external users */ | |
621 | ||
622 | sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index) | |
623 | { | |
624 | Object *obj; | |
625 | char name[256]; | |
626 | ||
627 | snprintf(name, sizeof(name), "%s/%x", DRC_CONTAINER_PATH, index); | |
628 | obj = object_resolve_path(name, NULL); | |
629 | ||
630 | return !obj ? NULL : SPAPR_DR_CONNECTOR(obj); | |
631 | } | |
632 | ||
633 | sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, | |
634 | uint32_t id) | |
635 | { | |
636 | return spapr_dr_connector_by_index( | |
637 | (get_type_shift(type) << DRC_INDEX_TYPE_SHIFT) | | |
638 | (id & DRC_INDEX_ID_MASK)); | |
639 | } | |
e4b798bb MR |
640 | |
641 | /* generate a string the describes the DRC to encode into the | |
642 | * device tree. | |
643 | * | |
644 | * as documented by PAPR+ v2.7, 13.5.2.6 and C.6.1 | |
645 | */ | |
646 | static const char *spapr_drc_get_type_str(sPAPRDRConnectorType type) | |
647 | { | |
648 | switch (type) { | |
649 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
650 | return "CPU"; | |
651 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
652 | return "PHB"; | |
653 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
654 | return "SLOT"; | |
655 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
656 | return "28"; | |
657 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
658 | return "MEM"; | |
659 | default: | |
660 | g_assert(false); | |
661 | } | |
662 | ||
663 | return NULL; | |
664 | } | |
665 | ||
666 | /** | |
667 | * spapr_drc_populate_dt | |
668 | * | |
669 | * @fdt: libfdt device tree | |
670 | * @path: path in the DT to generate properties | |
671 | * @owner: parent Object/DeviceState for which to generate DRC | |
672 | * descriptions for | |
673 | * @drc_type_mask: mask of sPAPRDRConnectorType values corresponding | |
674 | * to the types of DRCs to generate entries for | |
675 | * | |
676 | * generate OF properties to describe DRC topology/indices to guests | |
677 | * | |
678 | * as documented in PAPR+ v2.1, 13.5.2 | |
679 | */ | |
680 | int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner, | |
681 | uint32_t drc_type_mask) | |
682 | { | |
683 | Object *root_container; | |
684 | ObjectProperty *prop; | |
7746abd8 | 685 | ObjectPropertyIterator iter; |
e4b798bb MR |
686 | uint32_t drc_count = 0; |
687 | GArray *drc_indexes, *drc_power_domains; | |
688 | GString *drc_names, *drc_types; | |
689 | int ret; | |
690 | ||
691 | /* the first entry of each properties is a 32-bit integer encoding | |
692 | * the number of elements in the array. we won't know this until | |
693 | * we complete the iteration through all the matching DRCs, but | |
694 | * reserve the space now and set the offsets accordingly so we | |
695 | * can fill them in later. | |
696 | */ | |
697 | drc_indexes = g_array_new(false, true, sizeof(uint32_t)); | |
698 | drc_indexes = g_array_set_size(drc_indexes, 1); | |
699 | drc_power_domains = g_array_new(false, true, sizeof(uint32_t)); | |
700 | drc_power_domains = g_array_set_size(drc_power_domains, 1); | |
701 | drc_names = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
702 | drc_types = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
703 | ||
704 | /* aliases for all DRConnector objects will be rooted in QOM | |
705 | * composition tree at DRC_CONTAINER_PATH | |
706 | */ | |
707 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
708 | ||
7746abd8 DB |
709 | object_property_iter_init(&iter, root_container); |
710 | while ((prop = object_property_iter_next(&iter))) { | |
e4b798bb MR |
711 | Object *obj; |
712 | sPAPRDRConnector *drc; | |
713 | sPAPRDRConnectorClass *drck; | |
714 | uint32_t drc_index, drc_power_domain; | |
715 | ||
716 | if (!strstart(prop->type, "link<", NULL)) { | |
717 | continue; | |
718 | } | |
719 | ||
720 | obj = object_property_get_link(root_container, prop->name, NULL); | |
721 | drc = SPAPR_DR_CONNECTOR(obj); | |
722 | drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
723 | ||
724 | if (owner && (drc->owner != owner)) { | |
725 | continue; | |
726 | } | |
727 | ||
728 | if ((drc->type & drc_type_mask) == 0) { | |
729 | continue; | |
730 | } | |
731 | ||
732 | drc_count++; | |
733 | ||
734 | /* ibm,drc-indexes */ | |
735 | drc_index = cpu_to_be32(drck->get_index(drc)); | |
736 | g_array_append_val(drc_indexes, drc_index); | |
737 | ||
738 | /* ibm,drc-power-domains */ | |
739 | drc_power_domain = cpu_to_be32(-1); | |
740 | g_array_append_val(drc_power_domains, drc_power_domain); | |
741 | ||
742 | /* ibm,drc-names */ | |
743 | drc_names = g_string_append(drc_names, drck->get_name(drc)); | |
744 | drc_names = g_string_insert_len(drc_names, -1, "\0", 1); | |
745 | ||
746 | /* ibm,drc-types */ | |
747 | drc_types = g_string_append(drc_types, | |
748 | spapr_drc_get_type_str(drc->type)); | |
749 | drc_types = g_string_insert_len(drc_types, -1, "\0", 1); | |
750 | } | |
751 | ||
752 | /* now write the drc count into the space we reserved at the | |
753 | * beginning of the arrays previously | |
754 | */ | |
755 | *(uint32_t *)drc_indexes->data = cpu_to_be32(drc_count); | |
756 | *(uint32_t *)drc_power_domains->data = cpu_to_be32(drc_count); | |
757 | *(uint32_t *)drc_names->str = cpu_to_be32(drc_count); | |
758 | *(uint32_t *)drc_types->str = cpu_to_be32(drc_count); | |
759 | ||
760 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-indexes", | |
761 | drc_indexes->data, | |
762 | drc_indexes->len * sizeof(uint32_t)); | |
763 | if (ret) { | |
764 | fprintf(stderr, "Couldn't create ibm,drc-indexes property\n"); | |
765 | goto out; | |
766 | } | |
767 | ||
768 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-power-domains", | |
769 | drc_power_domains->data, | |
770 | drc_power_domains->len * sizeof(uint32_t)); | |
771 | if (ret) { | |
772 | fprintf(stderr, "Couldn't finalize ibm,drc-power-domains property\n"); | |
773 | goto out; | |
774 | } | |
775 | ||
776 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-names", | |
777 | drc_names->str, drc_names->len); | |
778 | if (ret) { | |
779 | fprintf(stderr, "Couldn't finalize ibm,drc-names property\n"); | |
780 | goto out; | |
781 | } | |
782 | ||
783 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-types", | |
784 | drc_types->str, drc_types->len); | |
785 | if (ret) { | |
786 | fprintf(stderr, "Couldn't finalize ibm,drc-types property\n"); | |
787 | goto out; | |
788 | } | |
789 | ||
790 | out: | |
791 | g_array_free(drc_indexes, true); | |
792 | g_array_free(drc_power_domains, true); | |
793 | g_string_free(drc_names, true); | |
794 | g_string_free(drc_types, true); | |
795 | ||
796 | return ret; | |
797 | } |