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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" |
4771d756 | 15 | #include "cpu.h" |
f348b6d1 | 16 | #include "qemu/cutils.h" |
bbf5c878 MR |
17 | #include "hw/ppc/spapr_drc.h" |
18 | #include "qom/object.h" | |
19 | #include "hw/qdev.h" | |
20 | #include "qapi/visitor.h" | |
21 | #include "qemu/error-report.h" | |
0cb688d2 | 22 | #include "hw/ppc/spapr.h" /* for RTAS return codes */ |
bbf5c878 MR |
23 | |
24 | /* #define DEBUG_SPAPR_DRC */ | |
25 | ||
26 | #ifdef DEBUG_SPAPR_DRC | |
27 | #define DPRINTF(fmt, ...) \ | |
28 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
29 | #define DPRINTFN(fmt, ...) \ | |
30 | do { DPRINTF(fmt, ## __VA_ARGS__); fprintf(stderr, "\n"); } while (0) | |
31 | #else | |
32 | #define DPRINTF(fmt, ...) \ | |
33 | do { } while (0) | |
34 | #define DPRINTFN(fmt, ...) \ | |
35 | do { } while (0) | |
36 | #endif | |
37 | ||
38 | #define DRC_CONTAINER_PATH "/dr-connector" | |
39 | #define DRC_INDEX_TYPE_SHIFT 28 | |
627c2ef7 | 40 | #define DRC_INDEX_ID_MASK ((1ULL << DRC_INDEX_TYPE_SHIFT) - 1) |
bbf5c878 MR |
41 | |
42 | static sPAPRDRConnectorTypeShift get_type_shift(sPAPRDRConnectorType type) | |
43 | { | |
44 | uint32_t shift = 0; | |
45 | ||
46 | /* make sure this isn't SPAPR_DR_CONNECTOR_TYPE_ANY, or some | |
47 | * other wonky value. | |
48 | */ | |
49 | g_assert(is_power_of_2(type)); | |
50 | ||
51 | while (type != (1 << shift)) { | |
52 | shift++; | |
53 | } | |
54 | return shift; | |
55 | } | |
56 | ||
57 | static uint32_t get_index(sPAPRDRConnector *drc) | |
58 | { | |
59 | /* no set format for a drc index: it only needs to be globally | |
60 | * unique. this is how we encode the DRC type on bare-metal | |
61 | * however, so might as well do that here | |
62 | */ | |
63 | return (get_type_shift(drc->type) << DRC_INDEX_TYPE_SHIFT) | | |
64 | (drc->id & DRC_INDEX_ID_MASK); | |
65 | } | |
66 | ||
0cb688d2 MR |
67 | static uint32_t set_isolation_state(sPAPRDRConnector *drc, |
68 | sPAPRDRIsolationState state) | |
bbf5c878 MR |
69 | { |
70 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
71 | ||
72 | DPRINTFN("drc: %x, set_isolation_state: %x", get_index(drc), state); | |
73 | ||
9d1852ce MR |
74 | if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) { |
75 | /* cannot unisolate a non-existant resource, and, or resources | |
76 | * which are in an 'UNUSABLE' allocation state. (PAPR 2.7, 13.5.3.5) | |
77 | */ | |
78 | if (!drc->dev || | |
79 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
80 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
81 | } | |
82 | } | |
83 | ||
bbf5c878 MR |
84 | drc->isolation_state = state; |
85 | ||
86 | if (drc->isolation_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
87 | /* if we're awaiting release, but still in an unconfigured state, | |
88 | * it's likely the guest is still in the process of configuring | |
89 | * the device and is transitioning the devices to an ISOLATED | |
90 | * state as a part of that process. so we only complete the | |
91 | * removal when this transition happens for a device in a | |
92 | * configured state, as suggested by the state diagram from | |
93 | * PAPR+ 2.7, 13.4 | |
94 | */ | |
95 | if (drc->awaiting_release) { | |
96 | if (drc->configured) { | |
97 | DPRINTFN("finalizing device removal"); | |
98 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
99 | drc->detach_cb_opaque, NULL); | |
100 | } else { | |
101 | DPRINTFN("deferring device removal on unconfigured device\n"); | |
102 | } | |
103 | } | |
104 | drc->configured = false; | |
105 | } | |
106 | ||
0cb688d2 | 107 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
108 | } |
109 | ||
0cb688d2 MR |
110 | static uint32_t set_indicator_state(sPAPRDRConnector *drc, |
111 | sPAPRDRIndicatorState state) | |
bbf5c878 MR |
112 | { |
113 | DPRINTFN("drc: %x, set_indicator_state: %x", get_index(drc), state); | |
114 | drc->indicator_state = state; | |
0cb688d2 | 115 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
116 | } |
117 | ||
0cb688d2 MR |
118 | static uint32_t set_allocation_state(sPAPRDRConnector *drc, |
119 | sPAPRDRAllocationState state) | |
bbf5c878 MR |
120 | { |
121 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
122 | ||
123 | DPRINTFN("drc: %x, set_allocation_state: %x", get_index(drc), state); | |
124 | ||
9d1852ce MR |
125 | if (state == SPAPR_DR_ALLOCATION_STATE_USABLE) { |
126 | /* if there's no resource/device associated with the DRC, there's | |
127 | * no way for us to put it in an allocation state consistent with | |
128 | * being 'USABLE'. PAPR 2.7, 13.5.3.4 documents that this should | |
129 | * result in an RTAS return code of -3 / "no such indicator" | |
130 | */ | |
131 | if (!drc->dev) { | |
132 | return RTAS_OUT_NO_SUCH_INDICATOR; | |
133 | } | |
134 | } | |
135 | ||
bbf5c878 MR |
136 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) { |
137 | drc->allocation_state = state; | |
138 | if (drc->awaiting_release && | |
139 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
140 | DPRINTFN("finalizing device removal"); | |
141 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
142 | drc->detach_cb_opaque, NULL); | |
143 | } | |
144 | } | |
0cb688d2 | 145 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
146 | } |
147 | ||
148 | static uint32_t get_type(sPAPRDRConnector *drc) | |
149 | { | |
150 | return drc->type; | |
151 | } | |
152 | ||
153 | static const char *get_name(sPAPRDRConnector *drc) | |
154 | { | |
155 | return drc->name; | |
156 | } | |
157 | ||
158 | static const void *get_fdt(sPAPRDRConnector *drc, int *fdt_start_offset) | |
159 | { | |
160 | if (fdt_start_offset) { | |
161 | *fdt_start_offset = drc->fdt_start_offset; | |
162 | } | |
163 | return drc->fdt; | |
164 | } | |
165 | ||
166 | static void set_configured(sPAPRDRConnector *drc) | |
167 | { | |
168 | DPRINTFN("drc: %x, set_configured", get_index(drc)); | |
169 | ||
170 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) { | |
171 | /* guest should be not configuring an isolated device */ | |
172 | DPRINTFN("drc: %x, set_configured: skipping isolated device", | |
173 | get_index(drc)); | |
174 | return; | |
175 | } | |
176 | drc->configured = true; | |
177 | } | |
178 | ||
f40eb921 MR |
179 | /* has the guest been notified of device attachment? */ |
180 | static void set_signalled(sPAPRDRConnector *drc) | |
181 | { | |
182 | drc->signalled = true; | |
183 | } | |
184 | ||
bbf5c878 MR |
185 | /* |
186 | * dr-entity-sense sensor value | |
187 | * returned via get-sensor-state RTAS calls | |
188 | * as expected by state diagram in PAPR+ 2.7, 13.4 | |
189 | * based on the current allocation/indicator/power states | |
190 | * for the DR connector. | |
191 | */ | |
0cb688d2 | 192 | static uint32_t entity_sense(sPAPRDRConnector *drc, sPAPRDREntitySense *state) |
bbf5c878 | 193 | { |
bbf5c878 MR |
194 | if (drc->dev) { |
195 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
196 | drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
197 | /* for logical DR, we return a state of UNUSABLE | |
198 | * iff the allocation state UNUSABLE. | |
199 | * Otherwise, report the state as USABLE/PRESENT, | |
200 | * as we would for PCI. | |
201 | */ | |
0cb688d2 | 202 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
203 | } else { |
204 | /* this assumes all PCI devices are assigned to | |
205 | * a 'live insertion' power domain, where QEMU | |
206 | * manages power state automatically as opposed | |
207 | * to the guest. present, non-PCI resources are | |
208 | * unaffected by power state. | |
209 | */ | |
0cb688d2 | 210 | *state = SPAPR_DR_ENTITY_SENSE_PRESENT; |
bbf5c878 MR |
211 | } |
212 | } else { | |
213 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
214 | /* PCI devices, and only PCI devices, use EMPTY | |
215 | * in cases where we'd otherwise use UNUSABLE | |
216 | */ | |
0cb688d2 | 217 | *state = SPAPR_DR_ENTITY_SENSE_EMPTY; |
bbf5c878 | 218 | } else { |
0cb688d2 | 219 | *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; |
bbf5c878 MR |
220 | } |
221 | } | |
222 | ||
223 | DPRINTFN("drc: %x, entity_sense: %x", get_index(drc), state); | |
0cb688d2 | 224 | return RTAS_OUT_SUCCESS; |
bbf5c878 MR |
225 | } |
226 | ||
d7bce999 EB |
227 | static void prop_get_index(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_index(drc); | |
51e72bc1 | 233 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
234 | } |
235 | ||
d7bce999 EB |
236 | static void prop_get_type(Object *obj, Visitor *v, const char *name, |
237 | void *opaque, Error **errp) | |
bbf5c878 MR |
238 | { |
239 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
240 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
241 | uint32_t value = (uint32_t)drck->get_type(drc); | |
51e72bc1 | 242 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
243 | } |
244 | ||
245 | static char *prop_get_name(Object *obj, Error **errp) | |
246 | { | |
247 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
248 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
249 | return g_strdup(drck->get_name(drc)); | |
250 | } | |
251 | ||
d7bce999 EB |
252 | static void prop_get_entity_sense(Object *obj, Visitor *v, const char *name, |
253 | void *opaque, Error **errp) | |
bbf5c878 MR |
254 | { |
255 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
256 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
0cb688d2 MR |
257 | uint32_t value; |
258 | ||
259 | drck->entity_sense(drc, &value); | |
51e72bc1 | 260 | visit_type_uint32(v, name, &value, errp); |
bbf5c878 MR |
261 | } |
262 | ||
d7bce999 EB |
263 | static void prop_get_fdt(Object *obj, Visitor *v, const char *name, |
264 | void *opaque, Error **errp) | |
bbf5c878 MR |
265 | { |
266 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
c75304a1 | 267 | Error *err = NULL; |
bbf5c878 MR |
268 | int fdt_offset_next, fdt_offset, fdt_depth; |
269 | void *fdt; | |
270 | ||
271 | if (!drc->fdt) { | |
a543a554 | 272 | visit_type_null(v, NULL, errp); |
bbf5c878 MR |
273 | return; |
274 | } | |
275 | ||
276 | fdt = drc->fdt; | |
277 | fdt_offset = drc->fdt_start_offset; | |
278 | fdt_depth = 0; | |
279 | ||
280 | do { | |
281 | const char *name = NULL; | |
282 | const struct fdt_property *prop = NULL; | |
283 | int prop_len = 0, name_len = 0; | |
284 | uint32_t tag; | |
285 | ||
286 | tag = fdt_next_tag(fdt, fdt_offset, &fdt_offset_next); | |
287 | switch (tag) { | |
288 | case FDT_BEGIN_NODE: | |
289 | fdt_depth++; | |
290 | name = fdt_get_name(fdt, fdt_offset, &name_len); | |
337283df | 291 | visit_start_struct(v, name, NULL, 0, &err); |
c75304a1 MA |
292 | if (err) { |
293 | error_propagate(errp, err); | |
294 | return; | |
295 | } | |
bbf5c878 MR |
296 | break; |
297 | case FDT_END_NODE: | |
298 | /* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */ | |
299 | g_assert(fdt_depth > 0); | |
15c2f669 EB |
300 | visit_check_struct(v, &err); |
301 | visit_end_struct(v); | |
c75304a1 MA |
302 | if (err) { |
303 | error_propagate(errp, err); | |
304 | return; | |
305 | } | |
bbf5c878 MR |
306 | fdt_depth--; |
307 | break; | |
308 | case FDT_PROP: { | |
309 | int i; | |
310 | prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len); | |
311 | name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff)); | |
c75304a1 MA |
312 | visit_start_list(v, name, &err); |
313 | if (err) { | |
314 | error_propagate(errp, err); | |
315 | return; | |
316 | } | |
bbf5c878 | 317 | for (i = 0; i < prop_len; i++) { |
51e72bc1 | 318 | visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err); |
c75304a1 MA |
319 | if (err) { |
320 | error_propagate(errp, err); | |
321 | return; | |
322 | } | |
323 | } | |
08f9541d | 324 | visit_end_list(v); |
bbf5c878 MR |
325 | break; |
326 | } | |
327 | default: | |
328 | error_setg(&error_abort, "device FDT in unexpected state: %d", tag); | |
329 | } | |
330 | fdt_offset = fdt_offset_next; | |
331 | } while (fdt_depth != 0); | |
332 | } | |
333 | ||
334 | static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt, | |
335 | int fdt_start_offset, bool coldplug, Error **errp) | |
336 | { | |
337 | DPRINTFN("drc: %x, attach", get_index(drc)); | |
338 | ||
339 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { | |
340 | error_setg(errp, "an attached device is still awaiting release"); | |
341 | return; | |
342 | } | |
343 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
344 | g_assert(drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE); | |
345 | } | |
346 | g_assert(fdt || coldplug); | |
347 | ||
348 | /* NOTE: setting initial isolation state to UNISOLATED means we can't | |
349 | * detach unless guest has a userspace/kernel that moves this state | |
350 | * back to ISOLATED in response to an unplug event, or this is done | |
351 | * manually by the admin prior. if we force things while the guest | |
352 | * may be accessing the device, we can easily crash the guest, so we | |
353 | * we defer completion of removal in such cases to the reset() hook. | |
354 | */ | |
355 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
356 | drc->isolation_state = SPAPR_DR_ISOLATION_STATE_UNISOLATED; | |
357 | } | |
358 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_ACTIVE; | |
359 | ||
360 | drc->dev = d; | |
361 | drc->fdt = fdt; | |
362 | drc->fdt_start_offset = fdt_start_offset; | |
785652dc | 363 | drc->configured = coldplug; |
df18b2db MR |
364 | /* 'logical' DR resources such as memory/cpus are in some cases treated |
365 | * as a pool of resources from which the guest is free to choose from | |
366 | * based on only a count. for resources that can be assigned in this | |
367 | * fashion, we must assume the resource is signalled immediately | |
368 | * since a single hotplug request might make an arbitrary number of | |
369 | * such attached resources available to the guest, as opposed to | |
370 | * 'physical' DR resources such as PCI where each device/resource is | |
371 | * signalled individually. | |
372 | */ | |
373 | drc->signalled = (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) | |
374 | ? true : coldplug; | |
bbf5c878 MR |
375 | |
376 | object_property_add_link(OBJECT(drc), "device", | |
377 | object_get_typename(OBJECT(drc->dev)), | |
378 | (Object **)(&drc->dev), | |
379 | NULL, 0, NULL); | |
380 | } | |
381 | ||
382 | static void detach(sPAPRDRConnector *drc, DeviceState *d, | |
383 | spapr_drc_detach_cb *detach_cb, | |
384 | void *detach_cb_opaque, Error **errp) | |
385 | { | |
386 | DPRINTFN("drc: %x, detach", get_index(drc)); | |
387 | ||
388 | drc->detach_cb = detach_cb; | |
389 | drc->detach_cb_opaque = detach_cb_opaque; | |
390 | ||
f40eb921 MR |
391 | /* if we've signalled device presence to the guest, or if the guest |
392 | * has gone ahead and configured the device (via manually-executed | |
393 | * device add via drmgr in guest, namely), we need to wait | |
394 | * for the guest to quiesce the device before completing detach. | |
395 | * Otherwise, we can assume the guest hasn't seen it and complete the | |
396 | * detach immediately. Note that there is a small race window | |
397 | * just before, or during, configuration, which is this context | |
398 | * refers mainly to fetching the device tree via RTAS. | |
399 | * During this window the device access will be arbitrated by | |
400 | * associated DRC, which will simply fail the RTAS calls as invalid. | |
401 | * This is recoverable within guest and current implementations of | |
402 | * drmgr should be able to cope. | |
403 | */ | |
404 | if (!drc->signalled && !drc->configured) { | |
405 | /* if the guest hasn't seen the device we can't rely on it to | |
406 | * set it back to an isolated state via RTAS, so do it here manually | |
407 | */ | |
408 | drc->isolation_state = SPAPR_DR_ISOLATION_STATE_ISOLATED; | |
409 | } | |
410 | ||
bbf5c878 MR |
411 | if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { |
412 | DPRINTFN("awaiting transition to isolated state before removal"); | |
413 | drc->awaiting_release = true; | |
414 | return; | |
415 | } | |
416 | ||
417 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
418 | drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { | |
419 | DPRINTFN("awaiting transition to unusable state before removal"); | |
420 | drc->awaiting_release = true; | |
421 | return; | |
422 | } | |
423 | ||
424 | drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE; | |
425 | ||
426 | if (drc->detach_cb) { | |
427 | drc->detach_cb(drc->dev, drc->detach_cb_opaque); | |
428 | } | |
429 | ||
430 | drc->awaiting_release = false; | |
431 | g_free(drc->fdt); | |
432 | drc->fdt = NULL; | |
433 | drc->fdt_start_offset = 0; | |
434 | object_property_del(OBJECT(drc), "device", NULL); | |
435 | drc->dev = NULL; | |
436 | drc->detach_cb = NULL; | |
437 | drc->detach_cb_opaque = NULL; | |
438 | } | |
439 | ||
440 | static bool release_pending(sPAPRDRConnector *drc) | |
441 | { | |
442 | return drc->awaiting_release; | |
443 | } | |
444 | ||
445 | static void reset(DeviceState *d) | |
446 | { | |
447 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
448 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
f40eb921 | 449 | sPAPRDREntitySense state; |
bbf5c878 MR |
450 | |
451 | DPRINTFN("drc reset: %x", drck->get_index(drc)); | |
452 | /* immediately upon reset we can safely assume DRCs whose devices | |
453 | * are pending removal can be safely removed, and that they will | |
454 | * subsequently be left in an ISOLATED state. move the DRC to this | |
455 | * state in these cases (which will in turn complete any pending | |
456 | * device removals) | |
457 | */ | |
458 | if (drc->awaiting_release) { | |
459 | drck->set_isolation_state(drc, SPAPR_DR_ISOLATION_STATE_ISOLATED); | |
460 | /* generally this should also finalize the removal, but if the device | |
461 | * hasn't yet been configured we normally defer removal under the | |
462 | * assumption that this transition is taking place as part of device | |
463 | * configuration. so check if we're still waiting after this, and | |
464 | * force removal if we are | |
465 | */ | |
466 | if (drc->awaiting_release) { | |
467 | drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, | |
468 | drc->detach_cb_opaque, NULL); | |
469 | } | |
470 | ||
471 | /* non-PCI devices may be awaiting a transition to UNUSABLE */ | |
472 | if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && | |
473 | drc->awaiting_release) { | |
474 | drck->set_allocation_state(drc, SPAPR_DR_ALLOCATION_STATE_UNUSABLE); | |
475 | } | |
476 | } | |
f40eb921 MR |
477 | |
478 | drck->entity_sense(drc, &state); | |
479 | if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) { | |
480 | drck->set_signalled(drc); | |
481 | } | |
bbf5c878 MR |
482 | } |
483 | ||
484 | static void realize(DeviceState *d, Error **errp) | |
485 | { | |
486 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
487 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
488 | Object *root_container; | |
489 | char link_name[256]; | |
490 | gchar *child_name; | |
491 | Error *err = NULL; | |
492 | ||
493 | DPRINTFN("drc realize: %x", drck->get_index(drc)); | |
494 | /* NOTE: we do this as part of realize/unrealize due to the fact | |
495 | * that the guest will communicate with the DRC via RTAS calls | |
496 | * referencing the global DRC index. By unlinking the DRC | |
497 | * from DRC_CONTAINER_PATH/<drc_index> we effectively make it | |
498 | * inaccessible by the guest, since lookups rely on this path | |
499 | * existing in the composition tree | |
500 | */ | |
501 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
502 | snprintf(link_name, sizeof(link_name), "%x", drck->get_index(drc)); | |
503 | child_name = object_get_canonical_path_component(OBJECT(drc)); | |
504 | DPRINTFN("drc child name: %s", child_name); | |
505 | object_property_add_alias(root_container, link_name, | |
506 | drc->owner, child_name, &err); | |
507 | if (err) { | |
4fffeb5e | 508 | error_report_err(err); |
bbf5c878 MR |
509 | object_unref(OBJECT(drc)); |
510 | } | |
586d2142 | 511 | g_free(child_name); |
bbf5c878 MR |
512 | DPRINTFN("drc realize complete"); |
513 | } | |
514 | ||
515 | static void unrealize(DeviceState *d, Error **errp) | |
516 | { | |
517 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); | |
518 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
519 | Object *root_container; | |
520 | char name[256]; | |
521 | Error *err = NULL; | |
522 | ||
523 | DPRINTFN("drc unrealize: %x", drck->get_index(drc)); | |
524 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
525 | snprintf(name, sizeof(name), "%x", drck->get_index(drc)); | |
526 | object_property_del(root_container, name, &err); | |
527 | if (err) { | |
4fffeb5e | 528 | error_report_err(err); |
bbf5c878 MR |
529 | object_unref(OBJECT(drc)); |
530 | } | |
531 | } | |
532 | ||
533 | sPAPRDRConnector *spapr_dr_connector_new(Object *owner, | |
534 | sPAPRDRConnectorType type, | |
535 | uint32_t id) | |
536 | { | |
537 | sPAPRDRConnector *drc = | |
538 | SPAPR_DR_CONNECTOR(object_new(TYPE_SPAPR_DR_CONNECTOR)); | |
94649d42 | 539 | char *prop_name; |
bbf5c878 MR |
540 | |
541 | g_assert(type); | |
542 | ||
543 | drc->type = type; | |
544 | drc->id = id; | |
545 | drc->owner = owner; | |
94649d42 DG |
546 | prop_name = g_strdup_printf("dr-connector[%"PRIu32"]", get_index(drc)); |
547 | object_property_add_child(owner, prop_name, OBJECT(drc), NULL); | |
bbf5c878 | 548 | object_property_set_bool(OBJECT(drc), true, "realized", NULL); |
94649d42 | 549 | g_free(prop_name); |
bbf5c878 MR |
550 | |
551 | /* human-readable name for a DRC to encode into the DT | |
552 | * description. this is mainly only used within a guest in place | |
553 | * of the unique DRC index. | |
554 | * | |
555 | * in the case of VIO/PCI devices, it corresponds to a | |
556 | * "location code" that maps a logical device/function (DRC index) | |
557 | * to a physical (or virtual in the case of VIO) location in the | |
558 | * system by chaining together the "location label" for each | |
559 | * encapsulating component. | |
560 | * | |
561 | * since this is more to do with diagnosing physical hardware | |
562 | * issues than guest compatibility, we choose location codes/DRC | |
563 | * names that adhere to the documented format, but avoid encoding | |
564 | * the entire topology information into the label/code, instead | |
565 | * just using the location codes based on the labels for the | |
566 | * endpoints (VIO/PCI adaptor connectors), which is basically | |
567 | * just "C" followed by an integer ID. | |
568 | * | |
569 | * DRC names as documented by PAPR+ v2.7, 13.5.2.4 | |
570 | * location codes as documented by PAPR+ v2.7, 12.3.1.5 | |
571 | */ | |
572 | switch (drc->type) { | |
573 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
574 | drc->name = g_strdup_printf("CPU %d", id); | |
575 | break; | |
576 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
577 | drc->name = g_strdup_printf("PHB %d", id); | |
578 | break; | |
579 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
580 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
581 | drc->name = g_strdup_printf("C%d", id); | |
582 | break; | |
583 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
584 | drc->name = g_strdup_printf("LMB %d", id); | |
585 | break; | |
586 | default: | |
587 | g_assert(false); | |
588 | } | |
589 | ||
590 | /* PCI slot always start in a USABLE state, and stay there */ | |
591 | if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { | |
592 | drc->allocation_state = SPAPR_DR_ALLOCATION_STATE_USABLE; | |
593 | } | |
594 | ||
595 | return drc; | |
596 | } | |
597 | ||
598 | static void spapr_dr_connector_instance_init(Object *obj) | |
599 | { | |
600 | sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); | |
601 | ||
602 | object_property_add_uint32_ptr(obj, "isolation-state", | |
603 | &drc->isolation_state, NULL); | |
604 | object_property_add_uint32_ptr(obj, "indicator-state", | |
605 | &drc->indicator_state, NULL); | |
606 | object_property_add_uint32_ptr(obj, "allocation-state", | |
607 | &drc->allocation_state, NULL); | |
608 | object_property_add_uint32_ptr(obj, "id", &drc->id, NULL); | |
609 | object_property_add(obj, "index", "uint32", prop_get_index, | |
610 | NULL, NULL, NULL, NULL); | |
611 | object_property_add(obj, "connector_type", "uint32", prop_get_type, | |
612 | NULL, NULL, NULL, NULL); | |
613 | object_property_add_str(obj, "name", prop_get_name, NULL, NULL); | |
614 | object_property_add(obj, "entity-sense", "uint32", prop_get_entity_sense, | |
615 | NULL, NULL, NULL, NULL); | |
616 | object_property_add(obj, "fdt", "struct", prop_get_fdt, | |
617 | NULL, NULL, NULL, NULL); | |
618 | } | |
619 | ||
620 | static void spapr_dr_connector_class_init(ObjectClass *k, void *data) | |
621 | { | |
622 | DeviceClass *dk = DEVICE_CLASS(k); | |
623 | sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k); | |
624 | ||
625 | dk->reset = reset; | |
626 | dk->realize = realize; | |
627 | dk->unrealize = unrealize; | |
628 | drck->set_isolation_state = set_isolation_state; | |
629 | drck->set_indicator_state = set_indicator_state; | |
630 | drck->set_allocation_state = set_allocation_state; | |
631 | drck->get_index = get_index; | |
632 | drck->get_type = get_type; | |
633 | drck->get_name = get_name; | |
634 | drck->get_fdt = get_fdt; | |
635 | drck->set_configured = set_configured; | |
636 | drck->entity_sense = entity_sense; | |
637 | drck->attach = attach; | |
638 | drck->detach = detach; | |
639 | drck->release_pending = release_pending; | |
f40eb921 | 640 | drck->set_signalled = set_signalled; |
c401ae8c MA |
641 | /* |
642 | * Reason: it crashes FIXME find and document the real reason | |
643 | */ | |
644 | dk->cannot_instantiate_with_device_add_yet = true; | |
bbf5c878 MR |
645 | } |
646 | ||
647 | static const TypeInfo spapr_dr_connector_info = { | |
648 | .name = TYPE_SPAPR_DR_CONNECTOR, | |
649 | .parent = TYPE_DEVICE, | |
650 | .instance_size = sizeof(sPAPRDRConnector), | |
651 | .instance_init = spapr_dr_connector_instance_init, | |
652 | .class_size = sizeof(sPAPRDRConnectorClass), | |
653 | .class_init = spapr_dr_connector_class_init, | |
654 | }; | |
655 | ||
656 | static void spapr_drc_register_types(void) | |
657 | { | |
658 | type_register_static(&spapr_dr_connector_info); | |
659 | } | |
660 | ||
661 | type_init(spapr_drc_register_types) | |
662 | ||
663 | /* helper functions for external users */ | |
664 | ||
665 | sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index) | |
666 | { | |
667 | Object *obj; | |
668 | char name[256]; | |
669 | ||
670 | snprintf(name, sizeof(name), "%s/%x", DRC_CONTAINER_PATH, index); | |
671 | obj = object_resolve_path(name, NULL); | |
672 | ||
673 | return !obj ? NULL : SPAPR_DR_CONNECTOR(obj); | |
674 | } | |
675 | ||
676 | sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, | |
677 | uint32_t id) | |
678 | { | |
679 | return spapr_dr_connector_by_index( | |
680 | (get_type_shift(type) << DRC_INDEX_TYPE_SHIFT) | | |
681 | (id & DRC_INDEX_ID_MASK)); | |
682 | } | |
e4b798bb MR |
683 | |
684 | /* generate a string the describes the DRC to encode into the | |
685 | * device tree. | |
686 | * | |
687 | * as documented by PAPR+ v2.7, 13.5.2.6 and C.6.1 | |
688 | */ | |
689 | static const char *spapr_drc_get_type_str(sPAPRDRConnectorType type) | |
690 | { | |
691 | switch (type) { | |
692 | case SPAPR_DR_CONNECTOR_TYPE_CPU: | |
693 | return "CPU"; | |
694 | case SPAPR_DR_CONNECTOR_TYPE_PHB: | |
695 | return "PHB"; | |
696 | case SPAPR_DR_CONNECTOR_TYPE_VIO: | |
697 | return "SLOT"; | |
698 | case SPAPR_DR_CONNECTOR_TYPE_PCI: | |
699 | return "28"; | |
700 | case SPAPR_DR_CONNECTOR_TYPE_LMB: | |
701 | return "MEM"; | |
702 | default: | |
703 | g_assert(false); | |
704 | } | |
705 | ||
706 | return NULL; | |
707 | } | |
708 | ||
709 | /** | |
710 | * spapr_drc_populate_dt | |
711 | * | |
712 | * @fdt: libfdt device tree | |
713 | * @path: path in the DT to generate properties | |
714 | * @owner: parent Object/DeviceState for which to generate DRC | |
715 | * descriptions for | |
716 | * @drc_type_mask: mask of sPAPRDRConnectorType values corresponding | |
717 | * to the types of DRCs to generate entries for | |
718 | * | |
719 | * generate OF properties to describe DRC topology/indices to guests | |
720 | * | |
721 | * as documented in PAPR+ v2.1, 13.5.2 | |
722 | */ | |
723 | int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner, | |
724 | uint32_t drc_type_mask) | |
725 | { | |
726 | Object *root_container; | |
727 | ObjectProperty *prop; | |
7746abd8 | 728 | ObjectPropertyIterator iter; |
e4b798bb MR |
729 | uint32_t drc_count = 0; |
730 | GArray *drc_indexes, *drc_power_domains; | |
731 | GString *drc_names, *drc_types; | |
732 | int ret; | |
733 | ||
734 | /* the first entry of each properties is a 32-bit integer encoding | |
735 | * the number of elements in the array. we won't know this until | |
736 | * we complete the iteration through all the matching DRCs, but | |
737 | * reserve the space now and set the offsets accordingly so we | |
738 | * can fill them in later. | |
739 | */ | |
740 | drc_indexes = g_array_new(false, true, sizeof(uint32_t)); | |
741 | drc_indexes = g_array_set_size(drc_indexes, 1); | |
742 | drc_power_domains = g_array_new(false, true, sizeof(uint32_t)); | |
743 | drc_power_domains = g_array_set_size(drc_power_domains, 1); | |
744 | drc_names = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
745 | drc_types = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); | |
746 | ||
747 | /* aliases for all DRConnector objects will be rooted in QOM | |
748 | * composition tree at DRC_CONTAINER_PATH | |
749 | */ | |
750 | root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); | |
751 | ||
7746abd8 DB |
752 | object_property_iter_init(&iter, root_container); |
753 | while ((prop = object_property_iter_next(&iter))) { | |
e4b798bb MR |
754 | Object *obj; |
755 | sPAPRDRConnector *drc; | |
756 | sPAPRDRConnectorClass *drck; | |
757 | uint32_t drc_index, drc_power_domain; | |
758 | ||
759 | if (!strstart(prop->type, "link<", NULL)) { | |
760 | continue; | |
761 | } | |
762 | ||
763 | obj = object_property_get_link(root_container, prop->name, NULL); | |
764 | drc = SPAPR_DR_CONNECTOR(obj); | |
765 | drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); | |
766 | ||
767 | if (owner && (drc->owner != owner)) { | |
768 | continue; | |
769 | } | |
770 | ||
771 | if ((drc->type & drc_type_mask) == 0) { | |
772 | continue; | |
773 | } | |
774 | ||
775 | drc_count++; | |
776 | ||
777 | /* ibm,drc-indexes */ | |
778 | drc_index = cpu_to_be32(drck->get_index(drc)); | |
779 | g_array_append_val(drc_indexes, drc_index); | |
780 | ||
781 | /* ibm,drc-power-domains */ | |
782 | drc_power_domain = cpu_to_be32(-1); | |
783 | g_array_append_val(drc_power_domains, drc_power_domain); | |
784 | ||
785 | /* ibm,drc-names */ | |
786 | drc_names = g_string_append(drc_names, drck->get_name(drc)); | |
787 | drc_names = g_string_insert_len(drc_names, -1, "\0", 1); | |
788 | ||
789 | /* ibm,drc-types */ | |
790 | drc_types = g_string_append(drc_types, | |
791 | spapr_drc_get_type_str(drc->type)); | |
792 | drc_types = g_string_insert_len(drc_types, -1, "\0", 1); | |
793 | } | |
794 | ||
795 | /* now write the drc count into the space we reserved at the | |
796 | * beginning of the arrays previously | |
797 | */ | |
798 | *(uint32_t *)drc_indexes->data = cpu_to_be32(drc_count); | |
799 | *(uint32_t *)drc_power_domains->data = cpu_to_be32(drc_count); | |
800 | *(uint32_t *)drc_names->str = cpu_to_be32(drc_count); | |
801 | *(uint32_t *)drc_types->str = cpu_to_be32(drc_count); | |
802 | ||
803 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-indexes", | |
804 | drc_indexes->data, | |
805 | drc_indexes->len * sizeof(uint32_t)); | |
806 | if (ret) { | |
807 | fprintf(stderr, "Couldn't create ibm,drc-indexes property\n"); | |
808 | goto out; | |
809 | } | |
810 | ||
811 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-power-domains", | |
812 | drc_power_domains->data, | |
813 | drc_power_domains->len * sizeof(uint32_t)); | |
814 | if (ret) { | |
815 | fprintf(stderr, "Couldn't finalize ibm,drc-power-domains property\n"); | |
816 | goto out; | |
817 | } | |
818 | ||
819 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-names", | |
820 | drc_names->str, drc_names->len); | |
821 | if (ret) { | |
822 | fprintf(stderr, "Couldn't finalize ibm,drc-names property\n"); | |
823 | goto out; | |
824 | } | |
825 | ||
826 | ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-types", | |
827 | drc_types->str, drc_types->len); | |
828 | if (ret) { | |
829 | fprintf(stderr, "Couldn't finalize ibm,drc-types property\n"); | |
830 | goto out; | |
831 | } | |
832 | ||
833 | out: | |
834 | g_array_free(drc_indexes, true); | |
835 | g_array_free(drc_power_domains, true); | |
836 | g_string_free(drc_names, true); | |
837 | g_string_free(drc_types, true); | |
838 | ||
839 | return ret; | |
840 | } |