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94bd2708 DN |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Cross Partition Communication (XPC) uv-based functions. | |
11 | * | |
12 | * Architecture specific implementation of common functions. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
5b8669df DN |
17 | #include <linux/mm.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/device.h> | |
2525789b | 21 | #include <linux/err.h> |
261f3b49 | 22 | #include <asm/uv/uv_hub.h> |
2525789b DN |
23 | #if defined CONFIG_X86_64 |
24 | #include <asm/uv/bios.h> | |
25 | #include <asm/uv/uv_irq.h> | |
26 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
27 | #include <asm/sn/intr.h> | |
28 | #include <asm/sn/sn_sal.h> | |
29 | #endif | |
5b8669df | 30 | #include "../sgi-gru/gru.h" |
261f3b49 | 31 | #include "../sgi-gru/grukservices.h" |
94bd2708 DN |
32 | #include "xpc.h" |
33 | ||
5b8669df | 34 | static atomic64_t xpc_heartbeat_uv; |
33ba3c77 DN |
35 | static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); |
36 | ||
5b8669df | 37 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
38 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
39 | XPC_ACTIVATE_MSG_SIZE_UV) | |
40 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 41 | |
2525789b DN |
42 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
43 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
44 | XPC_NOTIFY_MSG_SIZE_UV) | |
45 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 46 | |
2525789b DN |
47 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
48 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
49 | |
50 | static int | |
51 | xpc_setup_partitions_sn_uv(void) | |
52 | { | |
53 | short partid; | |
54 | struct xpc_partition_uv *part_uv; | |
55 | ||
56 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
57 | part_uv = &xpc_partitions[partid].sn.uv; | |
58 | ||
59 | spin_lock_init(&part_uv->flags_lock); | |
60 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
61 | } | |
62 | return 0; | |
63 | } | |
64 | ||
2525789b DN |
65 | static int |
66 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
67 | { | |
68 | #if defined CONFIG_X86_64 | |
69 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset); | |
70 | if (mq->irq < 0) { | |
71 | dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", | |
72 | mq->irq); | |
73 | } | |
74 | ||
75 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
76 | int mmr_pnode; | |
77 | unsigned long mmr_value; | |
78 | ||
79 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) | |
80 | mq->irq = SGI_XPC_ACTIVATE; | |
81 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
82 | mq->irq = SGI_XPC_NOTIFY; | |
83 | else | |
84 | return -EINVAL; | |
85 | ||
86 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
87 | mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; | |
88 | ||
89 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
90 | #else | |
91 | #error not a supported configuration | |
92 | #endif | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static void | |
98 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
99 | { | |
100 | #if defined CONFIG_X86_64 | |
101 | uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset); | |
102 | ||
103 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
104 | int mmr_pnode; | |
105 | unsigned long mmr_value; | |
106 | ||
107 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
108 | mmr_value = 1UL << 16; | |
109 | ||
110 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
111 | #else | |
112 | #error not a supported configuration | |
113 | #endif | |
114 | } | |
115 | ||
116 | static int | |
117 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
118 | { | |
119 | int ret; | |
120 | ||
121 | #if defined CONFIG_X86_64 | |
c8182f00 RA |
122 | ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), |
123 | mq->order, &mq->mmr_offset); | |
2525789b DN |
124 | if (ret < 0) { |
125 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
126 | "ret=%d\n", ret); | |
127 | return ret; | |
128 | } | |
129 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
c8182f00 RA |
130 | ret = sn_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), |
131 | mq->order, &mq->mmr_offset); | |
2525789b DN |
132 | if (ret < 0) { |
133 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
134 | ret); | |
135 | return -EBUSY; | |
136 | } | |
137 | #else | |
138 | #error not a supported configuration | |
139 | #endif | |
140 | ||
141 | mq->watchlist_num = ret; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static void | |
146 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
147 | { | |
148 | int ret; | |
149 | ||
150 | #if defined CONFIG_X86_64 | |
151 | ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
152 | BUG_ON(ret != BIOS_STATUS_SUCCESS); | |
153 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
154 | ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
155 | BUG_ON(ret != SALRET_OK); | |
156 | #else | |
157 | #error not a supported configuration | |
158 | #endif | |
159 | } | |
160 | ||
161 | static struct xpc_gru_mq_uv * | |
162 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
163 | irq_handler_t irq_handler) |
164 | { | |
2525789b | 165 | enum xp_retval xp_ret; |
5b8669df DN |
166 | int ret; |
167 | int nid; | |
2525789b | 168 | int pg_order; |
5b8669df | 169 | struct page *page; |
2525789b DN |
170 | struct xpc_gru_mq_uv *mq; |
171 | ||
172 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
173 | if (mq == NULL) { | |
174 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
175 | "a xpc_gru_mq_uv structure\n"); | |
176 | ret = -ENOMEM; | |
177 | goto out_1; | |
178 | } | |
5b8669df | 179 | |
2525789b DN |
180 | pg_order = get_order(mq_size); |
181 | mq->order = pg_order + PAGE_SHIFT; | |
182 | mq_size = 1UL << mq->order; | |
183 | ||
184 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
185 | ||
186 | nid = cpu_to_node(cpu); | |
5b8669df | 187 | page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE, |
2525789b | 188 | pg_order); |
bd3e64c1 DN |
189 | if (page == NULL) { |
190 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
191 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
192 | ret = -ENOMEM; |
193 | goto out_2; | |
bd3e64c1 | 194 | } |
2525789b | 195 | mq->address = page_address(page); |
5b8669df | 196 | |
2525789b | 197 | ret = gru_create_message_queue(mq->address, mq_size); |
5b8669df DN |
198 | if (ret != 0) { |
199 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
200 | "error=%d\n", ret); | |
2525789b DN |
201 | ret = -EINVAL; |
202 | goto out_3; | |
5b8669df DN |
203 | } |
204 | ||
2525789b DN |
205 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
206 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
207 | if (ret != 0) | |
208 | goto out_3; | |
5b8669df | 209 | |
2525789b DN |
210 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
211 | if (ret != 0) | |
212 | goto out_4; | |
213 | ||
214 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
215 | if (ret != 0) { |
216 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
2525789b DN |
217 | mq->irq, ret); |
218 | goto out_5; | |
5b8669df DN |
219 | } |
220 | ||
2525789b DN |
221 | /* allow other partitions to access this GRU mq */ |
222 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
223 | if (xp_ret != xpSuccess) { | |
224 | ret = -EACCES; | |
225 | goto out_6; | |
226 | } | |
5b8669df DN |
227 | |
228 | return mq; | |
2525789b DN |
229 | |
230 | /* something went wrong */ | |
231 | out_6: | |
232 | free_irq(mq->irq, NULL); | |
233 | out_5: | |
234 | xpc_release_gru_mq_irq_uv(mq); | |
235 | out_4: | |
236 | xpc_gru_mq_watchlist_free_uv(mq); | |
237 | out_3: | |
238 | free_pages((unsigned long)mq->address, pg_order); | |
239 | out_2: | |
240 | kfree(mq); | |
241 | out_1: | |
242 | return ERR_PTR(ret); | |
5b8669df | 243 | } |
94bd2708 | 244 | |
33ba3c77 | 245 | static void |
2525789b | 246 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 247 | { |
2525789b DN |
248 | unsigned int mq_size; |
249 | int pg_order; | |
250 | int ret; | |
251 | ||
252 | /* disallow other partitions to access GRU mq */ | |
253 | mq_size = 1UL << mq->order; | |
254 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
255 | BUG_ON(ret != xpSuccess); | |
256 | ||
257 | /* unregister irq handler and release mq irq/vector mapping */ | |
258 | free_irq(mq->irq, NULL); | |
259 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 260 | |
2525789b DN |
261 | /* disable generation of irq when GRU mq op occurs to this mq */ |
262 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 263 | |
2525789b DN |
264 | pg_order = mq->order - PAGE_SHIFT; |
265 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 266 | |
2525789b | 267 | kfree(mq); |
5b8669df DN |
268 | } |
269 | ||
270 | static enum xp_retval | |
271 | xpc_send_gru_msg(unsigned long mq_gpa, void *msg, size_t msg_size) | |
33ba3c77 | 272 | { |
5b8669df DN |
273 | enum xp_retval xp_ret; |
274 | int ret; | |
275 | ||
276 | while (1) { | |
277 | ret = gru_send_message_gpa(mq_gpa, msg, msg_size); | |
278 | if (ret == MQE_OK) { | |
279 | xp_ret = xpSuccess; | |
280 | break; | |
281 | } | |
282 | ||
283 | if (ret == MQE_QUEUE_FULL) { | |
284 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
285 | "error=MQE_QUEUE_FULL\n"); | |
286 | /* !!! handle QLimit reached; delay & try again */ | |
287 | /* ??? Do we add a limit to the number of retries? */ | |
288 | (void)msleep_interruptible(10); | |
289 | } else if (ret == MQE_CONGESTION) { | |
290 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
291 | "error=MQE_CONGESTION\n"); | |
292 | /* !!! handle LB Overflow; simply try again */ | |
293 | /* ??? Do we add a limit to the number of retries? */ | |
294 | } else { | |
295 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
296 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
297 | "error=%d\n", ret); | |
298 | xp_ret = xpGruSendMqError; | |
299 | break; | |
300 | } | |
301 | } | |
302 | return xp_ret; | |
303 | } | |
304 | ||
305 | static void | |
306 | xpc_process_activate_IRQ_rcvd_uv(void) | |
307 | { | |
308 | unsigned long irq_flags; | |
309 | short partid; | |
310 | struct xpc_partition *part; | |
311 | u8 act_state_req; | |
312 | ||
313 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
314 | ||
315 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
316 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
317 | part = &xpc_partitions[partid]; | |
318 | ||
319 | if (part->sn.uv.act_state_req == 0) | |
320 | continue; | |
321 | ||
322 | xpc_activate_IRQ_rcvd--; | |
323 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
324 | ||
325 | act_state_req = part->sn.uv.act_state_req; | |
326 | part->sn.uv.act_state_req = 0; | |
327 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
328 | ||
329 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
330 | if (part->act_state == XPC_P_AS_INACTIVE) | |
331 | xpc_activate_partition(part); | |
332 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
333 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
334 | ||
335 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
336 | if (part->act_state == XPC_P_AS_INACTIVE) | |
337 | xpc_activate_partition(part); | |
338 | else | |
339 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
340 | ||
341 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
342 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
343 | ||
344 | } else { | |
345 | BUG(); | |
346 | } | |
347 | ||
348 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
349 | if (xpc_activate_IRQ_rcvd == 0) | |
350 | break; | |
351 | } | |
352 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
353 | ||
354 | } | |
355 | ||
bd3e64c1 DN |
356 | static void |
357 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
358 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
359 | int *wakeup_hb_checker) | |
5b8669df DN |
360 | { |
361 | unsigned long irq_flags; | |
bd3e64c1 | 362 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 363 | struct xpc_openclose_args *args; |
5b8669df | 364 | |
bd3e64c1 | 365 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 366 | |
bd3e64c1 DN |
367 | switch (msg_hdr->type) { |
368 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
369 | /* syncing of remote_act_state was just done above */ | |
370 | break; | |
5b8669df | 371 | |
bd3e64c1 DN |
372 | case XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV: { |
373 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
5b8669df | 374 | |
bd3e64c1 DN |
375 | msg = container_of(msg_hdr, |
376 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
377 | hdr); | |
378 | part_uv->heartbeat = msg->heartbeat; | |
379 | break; | |
380 | } | |
381 | case XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV: { | |
382 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
383 | ||
384 | msg = container_of(msg_hdr, | |
385 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
386 | hdr); | |
387 | part_uv->heartbeat = msg->heartbeat; | |
388 | ||
389 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
390 | part_uv->flags |= XPC_P_HEARTBEAT_OFFLINE_UV; | |
391 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
392 | break; | |
393 | } | |
394 | case XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV: { | |
395 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
396 | ||
397 | msg = container_of(msg_hdr, | |
398 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
399 | hdr); | |
400 | part_uv->heartbeat = msg->heartbeat; | |
401 | ||
402 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
403 | part_uv->flags &= ~XPC_P_HEARTBEAT_OFFLINE_UV; | |
404 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
405 | break; | |
406 | } | |
407 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { | |
408 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 409 | |
bd3e64c1 DN |
410 | /* |
411 | * ??? Do we deal here with ts_jiffies being different | |
412 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
413 | * ??? below? | |
414 | */ | |
415 | msg = container_of(msg_hdr, struct | |
416 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 417 | |
bd3e64c1 DN |
418 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
419 | if (part_uv->act_state_req == 0) | |
420 | xpc_activate_IRQ_rcvd++; | |
421 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
422 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
423 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
424 | part_uv->remote_activate_mq_gpa = msg->activate_mq_gpa; | |
425 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 426 | |
bd3e64c1 DN |
427 | (*wakeup_hb_checker)++; |
428 | break; | |
429 | } | |
430 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
431 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 432 | |
bd3e64c1 DN |
433 | msg = container_of(msg_hdr, struct |
434 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 435 | |
bd3e64c1 DN |
436 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
437 | if (part_uv->act_state_req == 0) | |
438 | xpc_activate_IRQ_rcvd++; | |
439 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
440 | part_uv->reason = msg->reason; | |
441 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
442 | ||
443 | (*wakeup_hb_checker)++; | |
444 | return; | |
445 | } | |
446 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
447 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 448 | |
bd3e64c1 DN |
449 | msg = container_of(msg_hdr, struct |
450 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
451 | hdr); | |
452 | args = &part->remote_openclose_args[msg->ch_number]; | |
453 | args->reason = msg->reason; | |
5b8669df | 454 | |
bd3e64c1 DN |
455 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
456 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
457 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 458 | |
bd3e64c1 DN |
459 | xpc_wakeup_channel_mgr(part); |
460 | break; | |
461 | } | |
462 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
463 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 464 | |
bd3e64c1 DN |
465 | msg = container_of(msg_hdr, struct |
466 | xpc_activate_mq_msg_chctl_closereply_uv, | |
467 | hdr); | |
5b8669df | 468 | |
bd3e64c1 DN |
469 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
470 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
471 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 472 | |
bd3e64c1 DN |
473 | xpc_wakeup_channel_mgr(part); |
474 | break; | |
475 | } | |
476 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { | |
477 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
478 | ||
479 | msg = container_of(msg_hdr, struct | |
480 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
481 | hdr); | |
482 | args = &part->remote_openclose_args[msg->ch_number]; | |
483 | args->entry_size = msg->entry_size; | |
484 | args->local_nentries = msg->local_nentries; | |
485 | ||
486 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
487 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
488 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
489 | ||
490 | xpc_wakeup_channel_mgr(part); | |
491 | break; | |
492 | } | |
493 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
494 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
495 | ||
496 | msg = container_of(msg_hdr, struct | |
497 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
498 | args = &part->remote_openclose_args[msg->ch_number]; | |
499 | args->remote_nentries = msg->remote_nentries; | |
500 | args->local_nentries = msg->local_nentries; | |
501 | args->local_msgqueue_pa = msg->local_notify_mq_gpa; | |
502 | ||
503 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
504 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
505 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
506 | ||
507 | xpc_wakeup_channel_mgr(part); | |
508 | break; | |
509 | } | |
510 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: | |
511 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
512 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
513 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
514 | break; | |
515 | ||
516 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
517 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
518 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
519 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
520 | break; | |
521 | ||
522 | default: | |
523 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
524 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
525 | ||
526 | /* get hb checker to deactivate from the remote partition */ | |
527 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
528 | if (part_uv->act_state_req == 0) | |
529 | xpc_activate_IRQ_rcvd++; | |
530 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
531 | part_uv->reason = xpBadMsgType; | |
532 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 533 | |
bd3e64c1 DN |
534 | (*wakeup_hb_checker)++; |
535 | return; | |
536 | } | |
5b8669df | 537 | |
bd3e64c1 DN |
538 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
539 | part->remote_rp_ts_jiffies != 0) { | |
540 | /* | |
541 | * ??? Does what we do here need to be sensitive to | |
542 | * ??? act_state or remote_act_state? | |
543 | */ | |
544 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
545 | if (part_uv->act_state_req == 0) | |
546 | xpc_activate_IRQ_rcvd++; | |
547 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
548 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 549 | |
bd3e64c1 DN |
550 | (*wakeup_hb_checker)++; |
551 | } | |
552 | } | |
553 | ||
554 | static irqreturn_t | |
555 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
556 | { | |
557 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
558 | short partid; | |
559 | struct xpc_partition *part; | |
560 | int wakeup_hb_checker = 0; | |
561 | ||
2525789b DN |
562 | while (1) { |
563 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->address); | |
564 | if (msg_hdr == NULL) | |
565 | break; | |
bd3e64c1 DN |
566 | |
567 | partid = msg_hdr->partid; | |
568 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
569 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
570 | "received invalid partid=0x%x in message\n", | |
571 | partid); | |
572 | } else { | |
573 | part = &xpc_partitions[partid]; | |
574 | if (xpc_part_ref(part)) { | |
575 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
576 | &wakeup_hb_checker); | |
577 | xpc_part_deref(part); | |
578 | } | |
5b8669df DN |
579 | } |
580 | ||
2525789b | 581 | gru_free_message(xpc_activate_mq_uv->address, msg_hdr); |
5b8669df DN |
582 | } |
583 | ||
584 | if (wakeup_hb_checker) | |
585 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
586 | ||
587 | return IRQ_HANDLED; | |
588 | } | |
589 | ||
590 | static enum xp_retval | |
591 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
592 | int msg_type) | |
593 | { | |
594 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
595 | ||
596 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
597 | ||
598 | msg_hdr->type = msg_type; | |
599 | msg_hdr->partid = XPC_PARTID(part); | |
600 | msg_hdr->act_state = part->act_state; | |
601 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
602 | ||
603 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ | |
604 | return xpc_send_gru_msg(part->sn.uv.remote_activate_mq_gpa, msg, | |
605 | msg_size); | |
606 | } | |
607 | ||
608 | static void | |
609 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
610 | size_t msg_size, int msg_type) | |
611 | { | |
612 | enum xp_retval ret; | |
613 | ||
614 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
615 | if (unlikely(ret != xpSuccess)) | |
616 | XPC_DEACTIVATE_PARTITION(part, ret); | |
617 | } | |
618 | ||
619 | static void | |
620 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
621 | void *msg, size_t msg_size, int msg_type) | |
622 | { | |
623 | struct xpc_partition *part = &xpc_partitions[ch->number]; | |
624 | enum xp_retval ret; | |
625 | ||
626 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
627 | if (unlikely(ret != xpSuccess)) { | |
628 | if (irq_flags != NULL) | |
629 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
630 | ||
631 | XPC_DEACTIVATE_PARTITION(part, ret); | |
632 | ||
633 | if (irq_flags != NULL) | |
634 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
635 | } | |
636 | } | |
637 | ||
638 | static void | |
639 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
640 | { | |
641 | unsigned long irq_flags; | |
642 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
643 | ||
33ba3c77 | 644 | /* |
7d9d1f25 | 645 | * !!! Make our side think that the remote partition sent an activate |
5b8669df | 646 | * !!! message our way by doing what the activate IRQ handler would |
ea57f80c | 647 | * !!! do had one really been sent. |
33ba3c77 | 648 | */ |
5b8669df DN |
649 | |
650 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
651 | if (part_uv->act_state_req == 0) | |
652 | xpc_activate_IRQ_rcvd++; | |
653 | part_uv->act_state_req = act_state_req; | |
654 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
655 | ||
656 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
657 | } |
658 | ||
94bd2708 | 659 | static enum xp_retval |
5b8669df DN |
660 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
661 | size_t *len) | |
94bd2708 | 662 | { |
7d9d1f25 DN |
663 | s64 status; |
664 | enum xp_retval ret; | |
665 | ||
666 | #if defined CONFIG_X86_64 | |
667 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
668 | (u64 *)len); | |
669 | if (status == BIOS_STATUS_SUCCESS) | |
670 | ret = xpSuccess; | |
671 | else if (status == BIOS_STATUS_MORE_PASSES) | |
672 | ret = xpNeedMoreInfo; | |
673 | else | |
674 | ret = xpBiosError; | |
675 | ||
676 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
677 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
678 | if (status == SALRET_OK) | |
679 | ret = xpSuccess; | |
680 | else if (status == SALRET_MORE_PASSES) | |
681 | ret = xpNeedMoreInfo; | |
682 | else | |
683 | ret = xpSalError; | |
684 | ||
685 | #else | |
686 | #error not a supported configuration | |
687 | #endif | |
688 | ||
689 | return ret; | |
5b8669df DN |
690 | } |
691 | ||
692 | static int | |
693 | xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp) | |
694 | { | |
2525789b | 695 | rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv->address); |
5b8669df DN |
696 | return 0; |
697 | } | |
698 | ||
699 | static void | |
700 | xpc_send_heartbeat_uv(int msg_type) | |
701 | { | |
702 | short partid; | |
703 | struct xpc_partition *part; | |
704 | struct xpc_activate_mq_msg_heartbeat_req_uv msg; | |
705 | ||
706 | /* | |
707 | * !!! On uv we're broadcasting a heartbeat message every 5 seconds. | |
708 | * !!! Whereas on sn2 we're bte_copy'ng the heartbeat info every 20 | |
709 | * !!! seconds. This is an increase in numalink traffic. | |
710 | * ??? Is this good? | |
711 | */ | |
712 | ||
713 | msg.heartbeat = atomic64_inc_return(&xpc_heartbeat_uv); | |
714 | ||
715 | partid = find_first_bit(xpc_heartbeating_to_mask_uv, | |
716 | XP_MAX_NPARTITIONS_UV); | |
717 | ||
718 | while (partid < XP_MAX_NPARTITIONS_UV) { | |
719 | part = &xpc_partitions[partid]; | |
720 | ||
721 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
722 | msg_type); | |
723 | ||
724 | partid = find_next_bit(xpc_heartbeating_to_mask_uv, | |
725 | XP_MAX_NPARTITIONS_UV, partid + 1); | |
726 | } | |
94bd2708 DN |
727 | } |
728 | ||
33ba3c77 DN |
729 | static void |
730 | xpc_increment_heartbeat_uv(void) | |
731 | { | |
5b8669df DN |
732 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV); |
733 | } | |
734 | ||
735 | static void | |
736 | xpc_offline_heartbeat_uv(void) | |
737 | { | |
738 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV); | |
739 | } | |
740 | ||
741 | static void | |
742 | xpc_online_heartbeat_uv(void) | |
743 | { | |
744 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV); | |
33ba3c77 DN |
745 | } |
746 | ||
747 | static void | |
748 | xpc_heartbeat_init_uv(void) | |
749 | { | |
5b8669df | 750 | atomic64_set(&xpc_heartbeat_uv, 0); |
33ba3c77 DN |
751 | bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); |
752 | xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0]; | |
753 | } | |
754 | ||
755 | static void | |
756 | xpc_heartbeat_exit_uv(void) | |
757 | { | |
5b8669df DN |
758 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV); |
759 | } | |
760 | ||
761 | static enum xp_retval | |
762 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
763 | { | |
764 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
765 | enum xp_retval ret = xpNoHeartbeat; | |
766 | ||
767 | if (part_uv->remote_act_state != XPC_P_AS_INACTIVE && | |
768 | part_uv->remote_act_state != XPC_P_AS_DEACTIVATING) { | |
769 | ||
770 | if (part_uv->heartbeat != part->last_heartbeat || | |
771 | (part_uv->flags & XPC_P_HEARTBEAT_OFFLINE_UV)) { | |
772 | ||
773 | part->last_heartbeat = part_uv->heartbeat; | |
774 | ret = xpSuccess; | |
775 | } | |
776 | } | |
777 | return ret; | |
33ba3c77 DN |
778 | } |
779 | ||
780 | static void | |
a47d5dac | 781 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 782 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
783 | { |
784 | short partid = remote_rp->SAL_partid; | |
785 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 786 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 787 | |
5b8669df DN |
788 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
789 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
790 | part->sn.uv.remote_activate_mq_gpa = remote_rp->sn.activate_mq_gpa; | |
791 | ||
792 | /* | |
793 | * ??? Is it a good idea to make this conditional on what is | |
794 | * ??? potentially stale state information? | |
795 | */ | |
796 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
797 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
798 | msg.activate_mq_gpa = xpc_rsvd_page->sn.activate_mq_gpa; | |
799 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
800 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
801 | } | |
33ba3c77 | 802 | |
5b8669df DN |
803 | if (part->act_state == XPC_P_AS_INACTIVE) |
804 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
805 | } |
806 | ||
a47d5dac DN |
807 | static void |
808 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
809 | { | |
5b8669df DN |
810 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
811 | } | |
812 | ||
813 | static void | |
814 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
815 | { | |
816 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
817 | ||
818 | /* | |
819 | * ??? Is it a good idea to make this conditional on what is | |
820 | * ??? potentially stale state information? | |
821 | */ | |
822 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
823 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
824 | ||
825 | msg.reason = part->reason; | |
826 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
827 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
828 | } | |
a47d5dac DN |
829 | } |
830 | ||
bd3e64c1 DN |
831 | static void |
832 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
833 | { | |
834 | /* nothing needs to be done */ | |
835 | return; | |
836 | } | |
837 | ||
838 | static void | |
839 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
840 | { | |
841 | head->first = NULL; | |
842 | head->last = NULL; | |
843 | spin_lock_init(&head->lock); | |
844 | head->n_entries = 0; | |
845 | } | |
846 | ||
847 | static void * | |
848 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
849 | { | |
850 | unsigned long irq_flags; | |
851 | struct xpc_fifo_entry_uv *first; | |
852 | ||
853 | spin_lock_irqsave(&head->lock, irq_flags); | |
854 | first = head->first; | |
855 | if (head->first != NULL) { | |
856 | head->first = first->next; | |
857 | if (head->first == NULL) | |
858 | head->last = NULL; | |
859 | } | |
860 | head->n_entries++; | |
861 | spin_unlock_irqrestore(&head->lock, irq_flags); | |
862 | first->next = NULL; | |
863 | return first; | |
864 | } | |
865 | ||
866 | static void | |
867 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, | |
868 | struct xpc_fifo_entry_uv *last) | |
869 | { | |
870 | unsigned long irq_flags; | |
871 | ||
872 | last->next = NULL; | |
873 | spin_lock_irqsave(&head->lock, irq_flags); | |
874 | if (head->last != NULL) | |
875 | head->last->next = last; | |
876 | else | |
877 | head->first = last; | |
878 | head->last = last; | |
879 | head->n_entries--; | |
880 | BUG_ON(head->n_entries < 0); | |
881 | spin_unlock_irqrestore(&head->lock, irq_flags); | |
882 | } | |
883 | ||
884 | static int | |
885 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) | |
886 | { | |
887 | return head->n_entries; | |
888 | } | |
889 | ||
e17d416b | 890 | /* |
5b8669df | 891 | * Setup the channel structures that are uv specific. |
e17d416b DN |
892 | */ |
893 | static enum xp_retval | |
5b8669df | 894 | xpc_setup_ch_structures_sn_uv(struct xpc_partition *part) |
e17d416b | 895 | { |
bd3e64c1 DN |
896 | struct xpc_channel_uv *ch_uv; |
897 | int ch_number; | |
898 | ||
899 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { | |
900 | ch_uv = &part->channels[ch_number].sn.uv; | |
901 | ||
902 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
903 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
904 | } | |
905 | ||
906 | return xpSuccess; | |
e17d416b DN |
907 | } |
908 | ||
909 | /* | |
5b8669df | 910 | * Teardown the channel structures that are uv specific. |
e17d416b DN |
911 | */ |
912 | static void | |
5b8669df | 913 | xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part) |
e17d416b | 914 | { |
bd3e64c1 | 915 | /* nothing needs to be done */ |
e17d416b DN |
916 | return; |
917 | } | |
918 | ||
919 | static enum xp_retval | |
920 | xpc_make_first_contact_uv(struct xpc_partition *part) | |
921 | { | |
5b8669df DN |
922 | struct xpc_activate_mq_msg_uv msg; |
923 | ||
924 | /* | |
925 | * We send a sync msg to get the remote partition's remote_act_state | |
926 | * updated to our current act_state which at this point should | |
927 | * be XPC_P_AS_ACTIVATING. | |
928 | */ | |
929 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
930 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); | |
931 | ||
932 | while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) { | |
933 | ||
934 | dev_dbg(xpc_part, "waiting to make first contact with " | |
935 | "partition %d\n", XPC_PARTID(part)); | |
936 | ||
937 | /* wait a 1/4 of a second or so */ | |
938 | (void)msleep_interruptible(250); | |
939 | ||
940 | if (part->act_state == XPC_P_AS_DEACTIVATING) | |
941 | return part->reason; | |
942 | } | |
943 | ||
944 | return xpSuccess; | |
e17d416b DN |
945 | } |
946 | ||
947 | static u64 | |
7fb5e59d | 948 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
e17d416b | 949 | { |
5b8669df DN |
950 | unsigned long irq_flags; |
951 | union xpc_channel_ctl_flags chctl; | |
952 | ||
953 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
954 | chctl = part->chctl; | |
955 | if (chctl.all_flags != 0) | |
956 | part->chctl.all_flags = 0; | |
957 | ||
958 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
959 | return chctl.all_flags; | |
960 | } | |
961 | ||
bd3e64c1 DN |
962 | static enum xp_retval |
963 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) | |
964 | { | |
965 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
966 | struct xpc_send_msg_slot_uv *msg_slot; | |
967 | unsigned long irq_flags; | |
968 | int nentries; | |
969 | int entry; | |
970 | size_t nbytes; | |
971 | ||
972 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { | |
973 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); | |
974 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
975 | if (ch_uv->send_msg_slots == NULL) | |
976 | continue; | |
977 | ||
978 | for (entry = 0; entry < nentries; entry++) { | |
979 | msg_slot = &ch_uv->send_msg_slots[entry]; | |
980 | ||
981 | msg_slot->msg_slot_number = entry; | |
982 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, | |
983 | &msg_slot->next); | |
984 | } | |
985 | ||
986 | spin_lock_irqsave(&ch->lock, irq_flags); | |
987 | if (nentries < ch->local_nentries) | |
988 | ch->local_nentries = nentries; | |
989 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
990 | return xpSuccess; | |
991 | } | |
992 | ||
993 | return xpNoMemory; | |
994 | } | |
995 | ||
996 | static enum xp_retval | |
997 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) | |
998 | { | |
999 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1000 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1001 | unsigned long irq_flags; | |
1002 | int nentries; | |
1003 | int entry; | |
1004 | size_t nbytes; | |
1005 | ||
1006 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { | |
1007 | nbytes = nentries * ch->entry_size; | |
1008 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1009 | if (ch_uv->recv_msg_slots == NULL) | |
1010 | continue; | |
1011 | ||
1012 | for (entry = 0; entry < nentries; entry++) { | |
1013 | msg_slot = ch_uv->recv_msg_slots + entry * | |
1014 | ch->entry_size; | |
1015 | ||
1016 | msg_slot->hdr.msg_slot_number = entry; | |
1017 | } | |
1018 | ||
1019 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1020 | if (nentries < ch->remote_nentries) | |
1021 | ch->remote_nentries = nentries; | |
1022 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1023 | return xpSuccess; | |
1024 | } | |
1025 | ||
1026 | return xpNoMemory; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Allocate msg_slots associated with the channel. | |
1031 | */ | |
5b8669df DN |
1032 | static enum xp_retval |
1033 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) | |
1034 | { | |
bd3e64c1 DN |
1035 | static enum xp_retval ret; |
1036 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1037 | ||
1038 | DBUG_ON(ch->flags & XPC_C_SETUP); | |
1039 | ||
1040 | ret = xpc_allocate_send_msg_slot_uv(ch); | |
1041 | if (ret == xpSuccess) { | |
1042 | ||
1043 | ret = xpc_allocate_recv_msg_slot_uv(ch); | |
1044 | if (ret != xpSuccess) { | |
1045 | kfree(ch_uv->send_msg_slots); | |
1046 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1047 | } | |
1048 | } | |
1049 | return ret; | |
5b8669df DN |
1050 | } |
1051 | ||
bd3e64c1 DN |
1052 | /* |
1053 | * Free up msg_slots and clear other stuff that were setup for the specified | |
1054 | * channel. | |
1055 | */ | |
5b8669df DN |
1056 | static void |
1057 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) | |
1058 | { | |
1059 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1060 | ||
bd3e64c1 DN |
1061 | DBUG_ON(!spin_is_locked(&ch->lock)); |
1062 | ||
5b8669df DN |
1063 | ch_uv->remote_notify_mq_gpa = 0; |
1064 | ||
bd3e64c1 DN |
1065 | if (ch->flags & XPC_C_SETUP) { |
1066 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1067 | kfree(ch_uv->send_msg_slots); | |
1068 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1069 | kfree(ch_uv->recv_msg_slots); | |
1070 | } | |
5b8669df DN |
1071 | } |
1072 | ||
1073 | static void | |
1074 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1075 | { | |
1076 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; | |
1077 | ||
1078 | msg.ch_number = ch->number; | |
1079 | msg.reason = ch->reason; | |
1080 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1081 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); | |
1082 | } | |
1083 | ||
1084 | static void | |
1085 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1086 | { | |
1087 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; | |
1088 | ||
1089 | msg.ch_number = ch->number; | |
1090 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1091 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); | |
1092 | } | |
1093 | ||
1094 | static void | |
1095 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1096 | { | |
1097 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; | |
1098 | ||
1099 | msg.ch_number = ch->number; | |
bd3e64c1 | 1100 | msg.entry_size = ch->entry_size; |
5b8669df DN |
1101 | msg.local_nentries = ch->local_nentries; |
1102 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1103 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); | |
1104 | } | |
1105 | ||
1106 | static void | |
1107 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1108 | { | |
1109 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; | |
1110 | ||
1111 | msg.ch_number = ch->number; | |
1112 | msg.local_nentries = ch->local_nentries; | |
1113 | msg.remote_nentries = ch->remote_nentries; | |
1114 | msg.local_notify_mq_gpa = uv_gpa(xpc_notify_mq_uv); | |
1115 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1116 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); | |
1117 | } | |
1118 | ||
bd3e64c1 DN |
1119 | static void |
1120 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1121 | { | |
1122 | unsigned long irq_flags; | |
1123 | ||
1124 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1125 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1126 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1127 | ||
1128 | xpc_wakeup_channel_mgr(part); | |
1129 | } | |
1130 | ||
5b8669df DN |
1131 | static void |
1132 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, | |
1133 | unsigned long msgqueue_pa) | |
1134 | { | |
1135 | ch->sn.uv.remote_notify_mq_gpa = msgqueue_pa; | |
1136 | } | |
1137 | ||
1138 | static void | |
1139 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1140 | { | |
1141 | struct xpc_activate_mq_msg_uv msg; | |
1142 | ||
1143 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1144 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1145 | } | |
1146 | ||
1147 | static void | |
1148 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1149 | { | |
1150 | struct xpc_activate_mq_msg_uv msg; | |
1151 | ||
1152 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1153 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1154 | } | |
1155 | ||
1156 | static void | |
1157 | xpc_assume_partition_disengaged_uv(short partid) | |
1158 | { | |
1159 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1160 | unsigned long irq_flags; | |
1161 | ||
1162 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1163 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1164 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1165 | } | |
1166 | ||
1167 | static int | |
1168 | xpc_partition_engaged_uv(short partid) | |
1169 | { | |
1170 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1171 | } | |
1172 | ||
1173 | static int | |
1174 | xpc_any_partition_engaged_uv(void) | |
1175 | { | |
1176 | struct xpc_partition_uv *part_uv; | |
1177 | short partid; | |
1178 | ||
1179 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1180 | part_uv = &xpc_partitions[partid].sn.uv; | |
1181 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1182 | return 1; | |
1183 | } | |
1184 | return 0; | |
e17d416b DN |
1185 | } |
1186 | ||
bd3e64c1 DN |
1187 | static enum xp_retval |
1188 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1189 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1190 | { | |
1191 | enum xp_retval ret; | |
1192 | struct xpc_send_msg_slot_uv *msg_slot; | |
1193 | struct xpc_fifo_entry_uv *entry; | |
1194 | ||
1195 | while (1) { | |
1196 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1197 | if (entry != NULL) | |
1198 | break; | |
1199 | ||
1200 | if (flags & XPC_NOWAIT) | |
1201 | return xpNoWait; | |
1202 | ||
1203 | ret = xpc_allocate_msg_wait(ch); | |
1204 | if (ret != xpInterrupted && ret != xpTimeout) | |
1205 | return ret; | |
1206 | } | |
1207 | ||
1208 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1209 | *address_of_msg_slot = msg_slot; | |
1210 | return xpSuccess; | |
1211 | } | |
1212 | ||
1213 | static void | |
1214 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1215 | struct xpc_send_msg_slot_uv *msg_slot) | |
1216 | { | |
1217 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1218 | ||
1219 | /* wakeup anyone waiting for a free msg slot */ | |
1220 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1221 | wake_up(&ch->msg_allocate_wq); | |
1222 | } | |
1223 | ||
1224 | static void | |
1225 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1226 | struct xpc_send_msg_slot_uv *msg_slot, | |
1227 | enum xp_retval reason) | |
1228 | { | |
1229 | xpc_notify_func func = msg_slot->func; | |
1230 | ||
1231 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1232 | ||
1233 | atomic_dec(&ch->n_to_notify); | |
1234 | ||
1235 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1236 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1237 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1238 | ||
1239 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1240 | ||
1241 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1242 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1243 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | static void | |
1248 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1249 | struct xpc_notify_mq_msg_uv *msg) | |
1250 | { | |
1251 | struct xpc_send_msg_slot_uv *msg_slot; | |
1252 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1253 | ||
1254 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1255 | ||
1256 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1257 | msg_slot->msg_slot_number += ch->local_nentries; | |
1258 | ||
1259 | if (msg_slot->func != NULL) | |
1260 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1261 | ||
1262 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1263 | } | |
1264 | ||
1265 | static void | |
1266 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1267 | struct xpc_notify_mq_msg_uv *msg) | |
1268 | { | |
1269 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1270 | struct xpc_channel *ch; | |
1271 | struct xpc_channel_uv *ch_uv; | |
1272 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1273 | unsigned long irq_flags; | |
1274 | int ch_number = msg->hdr.ch_number; | |
1275 | ||
1276 | if (unlikely(ch_number >= part->nchannels)) { | |
1277 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1278 | "channel number=0x%x in message from partid=%d\n", | |
1279 | ch_number, XPC_PARTID(part)); | |
1280 | ||
1281 | /* get hb checker to deactivate from the remote partition */ | |
1282 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1283 | if (part_uv->act_state_req == 0) | |
1284 | xpc_activate_IRQ_rcvd++; | |
1285 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1286 | part_uv->reason = xpBadChannelNumber; | |
1287 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1288 | ||
1289 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1290 | return; | |
1291 | } | |
1292 | ||
1293 | ch = &part->channels[ch_number]; | |
1294 | xpc_msgqueue_ref(ch); | |
1295 | ||
1296 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1297 | xpc_msgqueue_deref(ch); | |
1298 | return; | |
1299 | } | |
1300 | ||
1301 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1302 | if (msg->hdr.size == 0) { | |
1303 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1304 | xpc_msgqueue_deref(ch); | |
1305 | return; | |
1306 | } | |
1307 | ||
1308 | /* we're dealing with a normal message sent via the notify_mq */ | |
1309 | ch_uv = &ch->sn.uv; | |
1310 | ||
1311 | msg_slot = (struct xpc_notify_mq_msg_uv *)((u64)ch_uv->recv_msg_slots + | |
1312 | (msg->hdr.msg_slot_number % ch->remote_nentries) * | |
1313 | ch->entry_size); | |
1314 | ||
1315 | BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number); | |
1316 | BUG_ON(msg_slot->hdr.size != 0); | |
1317 | ||
1318 | memcpy(msg_slot, msg, msg->hdr.size); | |
1319 | ||
1320 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1321 | ||
1322 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1323 | /* | |
1324 | * If there is an existing idle kthread get it to deliver | |
1325 | * the payload, otherwise we'll have to get the channel mgr | |
1326 | * for this partition to create a kthread to do the delivery. | |
1327 | */ | |
1328 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1329 | wake_up_nr(&ch->idle_wq, 1); | |
1330 | else | |
1331 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1332 | } | |
1333 | xpc_msgqueue_deref(ch); | |
1334 | } | |
1335 | ||
1336 | static irqreturn_t | |
1337 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1338 | { | |
1339 | struct xpc_notify_mq_msg_uv *msg; | |
1340 | short partid; | |
1341 | struct xpc_partition *part; | |
1342 | ||
1343 | while ((msg = gru_get_next_message(xpc_notify_mq_uv)) != NULL) { | |
1344 | ||
1345 | partid = msg->hdr.partid; | |
1346 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1347 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1348 | "invalid partid=0x%x in message\n", partid); | |
1349 | } else { | |
1350 | part = &xpc_partitions[partid]; | |
1351 | ||
1352 | if (xpc_part_ref(part)) { | |
1353 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1354 | xpc_part_deref(part); | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | gru_free_message(xpc_notify_mq_uv, msg); | |
1359 | } | |
1360 | ||
1361 | return IRQ_HANDLED; | |
1362 | } | |
1363 | ||
1364 | static int | |
1365 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1366 | { | |
1367 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1368 | } | |
1369 | ||
1370 | static void | |
1371 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1372 | { | |
1373 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1374 | int ndeliverable_payloads; | |
1375 | ||
1376 | xpc_msgqueue_ref(ch); | |
1377 | ||
1378 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1379 | ||
1380 | if (ndeliverable_payloads > 0 && | |
1381 | (ch->flags & XPC_C_CONNECTED) && | |
1382 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1383 | ||
1384 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1385 | } | |
1386 | ||
1387 | xpc_msgqueue_deref(ch); | |
1388 | } | |
1389 | ||
1390 | static enum xp_retval | |
1391 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1392 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1393 | void *key) | |
1394 | { | |
1395 | enum xp_retval ret = xpSuccess; | |
1396 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1397 | struct xpc_notify_mq_msg_uv *msg; | |
1398 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1399 | size_t msg_size; | |
1400 | ||
1401 | DBUG_ON(notify_type != XPC_N_CALL); | |
1402 | ||
1403 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1404 | if (msg_size > ch->entry_size) | |
1405 | return xpPayloadTooBig; | |
1406 | ||
1407 | xpc_msgqueue_ref(ch); | |
1408 | ||
1409 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1410 | ret = ch->reason; | |
1411 | goto out_1; | |
1412 | } | |
1413 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1414 | ret = xpNotConnected; | |
1415 | goto out_1; | |
1416 | } | |
1417 | ||
1418 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1419 | if (ret != xpSuccess) | |
1420 | goto out_1; | |
1421 | ||
1422 | if (func != NULL) { | |
1423 | atomic_inc(&ch->n_to_notify); | |
1424 | ||
1425 | msg_slot->key = key; | |
1426 | wmb(); /* a non-NULL func must hit memory after the key */ | |
1427 | msg_slot->func = func; | |
1428 | ||
1429 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1430 | ret = ch->reason; | |
1431 | goto out_2; | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1436 | msg->hdr.partid = xp_partition_id; | |
1437 | msg->hdr.ch_number = ch->number; | |
1438 | msg->hdr.size = msg_size; | |
1439 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1440 | memcpy(&msg->payload, payload, payload_size); | |
1441 | ||
1442 | ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg, msg_size); | |
1443 | if (ret == xpSuccess) | |
1444 | goto out_1; | |
1445 | ||
1446 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1447 | out_2: | |
1448 | if (func != NULL) { | |
1449 | /* | |
1450 | * Try to NULL the msg_slot's func field. If we fail, then | |
1451 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1452 | * case we need to pretend we succeeded to send the message | |
1453 | * since the user will get a callout for the disconnect error | |
1454 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1455 | * error returned here will confuse them. Additionally, since | |
1456 | * in this case the channel is being disconnected we don't need | |
1457 | * to put the the msg_slot back on the free list. | |
1458 | */ | |
1459 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1460 | ret = xpSuccess; | |
1461 | goto out_1; | |
1462 | } | |
1463 | ||
1464 | msg_slot->key = NULL; | |
1465 | atomic_dec(&ch->n_to_notify); | |
1466 | } | |
1467 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1468 | out_1: | |
1469 | xpc_msgqueue_deref(ch); | |
1470 | return ret; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1475 | * is unknown because the channel is now disconnecting. | |
1476 | * | |
1477 | * We don't worry about putting these msg_slots on the free list since the | |
1478 | * msg_slots themselves are about to be kfree'd. | |
1479 | */ | |
1480 | static void | |
1481 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1482 | { | |
1483 | struct xpc_send_msg_slot_uv *msg_slot; | |
1484 | int entry; | |
1485 | ||
1486 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1487 | ||
1488 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1489 | ||
1490 | if (atomic_read(&ch->n_to_notify) == 0) | |
1491 | break; | |
1492 | ||
1493 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1494 | if (msg_slot->func != NULL) | |
1495 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | /* | |
1500 | * Get the next deliverable message's payload. | |
1501 | */ | |
1502 | static void * | |
1503 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1504 | { | |
1505 | struct xpc_fifo_entry_uv *entry; | |
1506 | struct xpc_notify_mq_msg_uv *msg; | |
1507 | void *payload = NULL; | |
1508 | ||
1509 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1510 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1511 | if (entry != NULL) { | |
1512 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1513 | hdr.u.next); | |
1514 | payload = &msg->payload; | |
1515 | } | |
1516 | } | |
1517 | return payload; | |
1518 | } | |
1519 | ||
1520 | static void | |
1521 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1522 | { |
bd3e64c1 DN |
1523 | struct xpc_notify_mq_msg_uv *msg; |
1524 | enum xp_retval ret; | |
1525 | ||
1526 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1527 | ||
1528 | /* return an ACK to the sender of this message */ | |
1529 | ||
1530 | msg->hdr.partid = xp_partition_id; | |
1531 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1532 | ||
1533 | ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg, | |
1534 | sizeof(struct xpc_notify_mq_msghdr_uv)); | |
1535 | if (ret != xpSuccess) | |
1536 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1537 | ||
1538 | msg->hdr.msg_slot_number += ch->remote_nentries; | |
e17d416b DN |
1539 | } |
1540 | ||
5b8669df | 1541 | int |
94bd2708 DN |
1542 | xpc_init_uv(void) |
1543 | { | |
5b8669df DN |
1544 | xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv; |
1545 | xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv; | |
1546 | xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv; | |
1547 | xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv; | |
33ba3c77 | 1548 | xpc_increment_heartbeat = xpc_increment_heartbeat_uv; |
5b8669df DN |
1549 | xpc_offline_heartbeat = xpc_offline_heartbeat_uv; |
1550 | xpc_online_heartbeat = xpc_online_heartbeat_uv; | |
33ba3c77 DN |
1551 | xpc_heartbeat_init = xpc_heartbeat_init_uv; |
1552 | xpc_heartbeat_exit = xpc_heartbeat_exit_uv; | |
5b8669df DN |
1553 | xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_uv; |
1554 | ||
a47d5dac DN |
1555 | xpc_request_partition_activation = xpc_request_partition_activation_uv; |
1556 | xpc_request_partition_reactivation = | |
1557 | xpc_request_partition_reactivation_uv; | |
5b8669df DN |
1558 | xpc_request_partition_deactivation = |
1559 | xpc_request_partition_deactivation_uv; | |
bd3e64c1 DN |
1560 | xpc_cancel_partition_deactivation_request = |
1561 | xpc_cancel_partition_deactivation_request_uv; | |
5b8669df DN |
1562 | |
1563 | xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv; | |
1564 | xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv; | |
1565 | ||
e17d416b | 1566 | xpc_make_first_contact = xpc_make_first_contact_uv; |
5b8669df | 1567 | |
7fb5e59d | 1568 | xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv; |
5b8669df DN |
1569 | xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_uv; |
1570 | xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv; | |
1571 | xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv; | |
1572 | xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv; | |
1573 | ||
1574 | xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv; | |
1575 | ||
1576 | xpc_setup_msg_structures = xpc_setup_msg_structures_uv; | |
1577 | xpc_teardown_msg_structures = xpc_teardown_msg_structures_uv; | |
1578 | ||
1579 | xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_uv; | |
1580 | xpc_indicate_partition_disengaged = | |
1581 | xpc_indicate_partition_disengaged_uv; | |
1582 | xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_uv; | |
1583 | xpc_partition_engaged = xpc_partition_engaged_uv; | |
1584 | xpc_any_partition_engaged = xpc_any_partition_engaged_uv; | |
1585 | ||
bd3e64c1 DN |
1586 | xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv; |
1587 | xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv; | |
1588 | xpc_send_payload = xpc_send_payload_uv; | |
1589 | xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv; | |
1590 | xpc_get_deliverable_payload = xpc_get_deliverable_payload_uv; | |
1591 | xpc_received_payload = xpc_received_payload_uv; | |
1592 | ||
1593 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1594 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1595 | XPC_MSG_HDR_MAX_SIZE); | |
1596 | return -E2BIG; | |
1597 | } | |
5b8669df | 1598 | |
2525789b DN |
1599 | xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, |
1600 | XPC_ACTIVATE_IRQ_NAME, | |
5b8669df | 1601 | xpc_handle_activate_IRQ_uv); |
2525789b DN |
1602 | if (IS_ERR(xpc_activate_mq_uv)) |
1603 | return PTR_ERR(xpc_activate_mq_uv); | |
5b8669df | 1604 | |
2525789b DN |
1605 | xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, |
1606 | XPC_NOTIFY_IRQ_NAME, | |
bd3e64c1 | 1607 | xpc_handle_notify_IRQ_uv); |
2525789b DN |
1608 | if (IS_ERR(xpc_notify_mq_uv)) { |
1609 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1610 | return PTR_ERR(xpc_notify_mq_uv); | |
bd3e64c1 DN |
1611 | } |
1612 | ||
5b8669df | 1613 | return 0; |
94bd2708 DN |
1614 | } |
1615 | ||
1616 | void | |
1617 | xpc_exit_uv(void) | |
1618 | { | |
2525789b DN |
1619 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1620 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1621 | } |