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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 | * | |
361916a9 | 6 | * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. |
94bd2708 DN |
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 | ||
6f2584f4 JS |
34 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
35 | struct uv_IO_APIC_route_entry { | |
36 | __u64 vector : 8, | |
37 | delivery_mode : 3, | |
38 | dest_mode : 1, | |
39 | delivery_status : 1, | |
40 | polarity : 1, | |
41 | __reserved_1 : 1, | |
42 | trigger : 1, | |
43 | mask : 1, | |
44 | __reserved_2 : 15, | |
45 | dest : 32; | |
46 | }; | |
47 | #endif | |
48 | ||
5b8669df | 49 | static atomic64_t xpc_heartbeat_uv; |
33ba3c77 DN |
50 | static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); |
51 | ||
5b8669df | 52 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
53 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
54 | XPC_ACTIVATE_MSG_SIZE_UV) | |
55 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 56 | |
2525789b DN |
57 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
58 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
59 | XPC_NOTIFY_MSG_SIZE_UV) | |
60 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 61 | |
2525789b DN |
62 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
63 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
64 | |
65 | static int | |
66 | xpc_setup_partitions_sn_uv(void) | |
67 | { | |
68 | short partid; | |
69 | struct xpc_partition_uv *part_uv; | |
70 | ||
71 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
72 | part_uv = &xpc_partitions[partid].sn.uv; | |
73 | ||
6f2584f4 | 74 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
5b8669df DN |
75 | spin_lock_init(&part_uv->flags_lock); |
76 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
77 | } | |
78 | return 0; | |
79 | } | |
80 | ||
6f2584f4 JS |
81 | static void |
82 | xpc_teardown_partitions_sn_uv(void) | |
83 | { | |
84 | short partid; | |
85 | struct xpc_partition_uv *part_uv; | |
86 | unsigned long irq_flags; | |
87 | ||
88 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
89 | part_uv = &xpc_partitions[partid].sn.uv; | |
90 | ||
91 | if (part_uv->cached_activate_gru_mq_desc != NULL) { | |
92 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
93 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
94 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
95 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
96 | kfree(part_uv->cached_activate_gru_mq_desc); | |
97 | part_uv->cached_activate_gru_mq_desc = NULL; | |
98 | mutex_unlock(&part_uv-> | |
99 | cached_activate_gru_mq_desc_mutex); | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
2525789b DN |
104 | static int |
105 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
106 | { | |
6f2584f4 JS |
107 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
108 | ||
2525789b DN |
109 | #if defined CONFIG_X86_64 |
110 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset); | |
111 | if (mq->irq < 0) { | |
112 | dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", | |
6f2584f4 JS |
113 | -mq->irq); |
114 | return mq->irq; | |
2525789b DN |
115 | } |
116 | ||
6f2584f4 | 117 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
2525789b | 118 | |
6f2584f4 | 119 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
2525789b DN |
120 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
121 | mq->irq = SGI_XPC_ACTIVATE; | |
122 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
123 | mq->irq = SGI_XPC_NOTIFY; | |
124 | else | |
125 | return -EINVAL; | |
126 | ||
6f2584f4 JS |
127 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
128 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); | |
2525789b DN |
129 | #else |
130 | #error not a supported configuration | |
131 | #endif | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static void | |
137 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
138 | { | |
139 | #if defined CONFIG_X86_64 | |
140 | uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset); | |
141 | ||
142 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
143 | int mmr_pnode; | |
144 | unsigned long mmr_value; | |
145 | ||
146 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
147 | mmr_value = 1UL << 16; | |
148 | ||
149 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
150 | #else | |
151 | #error not a supported configuration | |
152 | #endif | |
153 | } | |
154 | ||
155 | static int | |
156 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
157 | { | |
158 | int ret; | |
159 | ||
160 | #if defined CONFIG_X86_64 | |
c8182f00 RA |
161 | ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), |
162 | mq->order, &mq->mmr_offset); | |
2525789b DN |
163 | if (ret < 0) { |
164 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
165 | "ret=%d\n", ret); | |
166 | return ret; | |
167 | } | |
168 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
6f2584f4 | 169 | ret = sn_mq_watchlist_alloc(mq->mmr_blade, (void *)uv_gpa(mq->address), |
c8182f00 | 170 | mq->order, &mq->mmr_offset); |
2525789b DN |
171 | if (ret < 0) { |
172 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
173 | ret); | |
174 | return -EBUSY; | |
175 | } | |
176 | #else | |
177 | #error not a supported configuration | |
178 | #endif | |
179 | ||
180 | mq->watchlist_num = ret; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static void | |
185 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
186 | { | |
187 | int ret; | |
188 | ||
189 | #if defined CONFIG_X86_64 | |
190 | ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
191 | BUG_ON(ret != BIOS_STATUS_SUCCESS); | |
192 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
193 | ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
194 | BUG_ON(ret != SALRET_OK); | |
195 | #else | |
196 | #error not a supported configuration | |
197 | #endif | |
198 | } | |
199 | ||
200 | static struct xpc_gru_mq_uv * | |
201 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
202 | irq_handler_t irq_handler) |
203 | { | |
2525789b | 204 | enum xp_retval xp_ret; |
5b8669df DN |
205 | int ret; |
206 | int nid; | |
2525789b | 207 | int pg_order; |
5b8669df | 208 | struct page *page; |
2525789b | 209 | struct xpc_gru_mq_uv *mq; |
6f2584f4 | 210 | struct uv_IO_APIC_route_entry *mmr_value; |
2525789b DN |
211 | |
212 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
213 | if (mq == NULL) { | |
214 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
215 | "a xpc_gru_mq_uv structure\n"); | |
216 | ret = -ENOMEM; | |
6f2584f4 JS |
217 | goto out_0; |
218 | } | |
219 | ||
220 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), | |
221 | GFP_KERNEL); | |
222 | if (mq->gru_mq_desc == NULL) { | |
223 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
224 | "a gru_message_queue_desc structure\n"); | |
225 | ret = -ENOMEM; | |
2525789b DN |
226 | goto out_1; |
227 | } | |
5b8669df | 228 | |
2525789b DN |
229 | pg_order = get_order(mq_size); |
230 | mq->order = pg_order + PAGE_SHIFT; | |
231 | mq_size = 1UL << mq->order; | |
232 | ||
233 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
234 | ||
235 | nid = cpu_to_node(cpu); | |
5b8669df | 236 | page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE, |
2525789b | 237 | pg_order); |
bd3e64c1 DN |
238 | if (page == NULL) { |
239 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
240 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
241 | ret = -ENOMEM; |
242 | goto out_2; | |
bd3e64c1 | 243 | } |
2525789b | 244 | mq->address = page_address(page); |
5b8669df | 245 | |
2525789b DN |
246 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
247 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
248 | if (ret != 0) | |
249 | goto out_3; | |
5b8669df | 250 | |
2525789b DN |
251 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
252 | if (ret != 0) | |
253 | goto out_4; | |
254 | ||
255 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
256 | if (ret != 0) { |
257 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
6f2584f4 | 258 | mq->irq, -ret); |
2525789b | 259 | goto out_5; |
5b8669df DN |
260 | } |
261 | ||
6f2584f4 JS |
262 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
263 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, | |
264 | nid, mmr_value->vector, mmr_value->dest); | |
265 | if (ret != 0) { | |
266 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
267 | "error=%d\n", ret); | |
268 | ret = -EINVAL; | |
269 | goto out_6; | |
270 | } | |
271 | ||
2525789b DN |
272 | /* allow other partitions to access this GRU mq */ |
273 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
274 | if (xp_ret != xpSuccess) { | |
275 | ret = -EACCES; | |
276 | goto out_6; | |
277 | } | |
5b8669df DN |
278 | |
279 | return mq; | |
2525789b DN |
280 | |
281 | /* something went wrong */ | |
282 | out_6: | |
283 | free_irq(mq->irq, NULL); | |
284 | out_5: | |
285 | xpc_release_gru_mq_irq_uv(mq); | |
286 | out_4: | |
287 | xpc_gru_mq_watchlist_free_uv(mq); | |
288 | out_3: | |
289 | free_pages((unsigned long)mq->address, pg_order); | |
290 | out_2: | |
6f2584f4 | 291 | kfree(mq->gru_mq_desc); |
2525789b | 292 | out_1: |
6f2584f4 JS |
293 | kfree(mq); |
294 | out_0: | |
2525789b | 295 | return ERR_PTR(ret); |
5b8669df | 296 | } |
94bd2708 | 297 | |
33ba3c77 | 298 | static void |
2525789b | 299 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 300 | { |
2525789b DN |
301 | unsigned int mq_size; |
302 | int pg_order; | |
303 | int ret; | |
304 | ||
305 | /* disallow other partitions to access GRU mq */ | |
306 | mq_size = 1UL << mq->order; | |
307 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
308 | BUG_ON(ret != xpSuccess); | |
309 | ||
310 | /* unregister irq handler and release mq irq/vector mapping */ | |
311 | free_irq(mq->irq, NULL); | |
312 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 313 | |
2525789b DN |
314 | /* disable generation of irq when GRU mq op occurs to this mq */ |
315 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 316 | |
2525789b DN |
317 | pg_order = mq->order - PAGE_SHIFT; |
318 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 319 | |
2525789b | 320 | kfree(mq); |
5b8669df DN |
321 | } |
322 | ||
323 | static enum xp_retval | |
6f2584f4 JS |
324 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
325 | size_t msg_size) | |
33ba3c77 | 326 | { |
5b8669df DN |
327 | enum xp_retval xp_ret; |
328 | int ret; | |
329 | ||
330 | while (1) { | |
6f2584f4 | 331 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
5b8669df DN |
332 | if (ret == MQE_OK) { |
333 | xp_ret = xpSuccess; | |
334 | break; | |
335 | } | |
336 | ||
337 | if (ret == MQE_QUEUE_FULL) { | |
338 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
339 | "error=MQE_QUEUE_FULL\n"); | |
340 | /* !!! handle QLimit reached; delay & try again */ | |
341 | /* ??? Do we add a limit to the number of retries? */ | |
342 | (void)msleep_interruptible(10); | |
343 | } else if (ret == MQE_CONGESTION) { | |
344 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
345 | "error=MQE_CONGESTION\n"); | |
346 | /* !!! handle LB Overflow; simply try again */ | |
347 | /* ??? Do we add a limit to the number of retries? */ | |
348 | } else { | |
349 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
350 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
351 | "error=%d\n", ret); | |
352 | xp_ret = xpGruSendMqError; | |
353 | break; | |
354 | } | |
355 | } | |
356 | return xp_ret; | |
357 | } | |
358 | ||
359 | static void | |
360 | xpc_process_activate_IRQ_rcvd_uv(void) | |
361 | { | |
362 | unsigned long irq_flags; | |
363 | short partid; | |
364 | struct xpc_partition *part; | |
365 | u8 act_state_req; | |
366 | ||
367 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
368 | ||
369 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
370 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
371 | part = &xpc_partitions[partid]; | |
372 | ||
373 | if (part->sn.uv.act_state_req == 0) | |
374 | continue; | |
375 | ||
376 | xpc_activate_IRQ_rcvd--; | |
377 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
378 | ||
379 | act_state_req = part->sn.uv.act_state_req; | |
380 | part->sn.uv.act_state_req = 0; | |
381 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
382 | ||
383 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
384 | if (part->act_state == XPC_P_AS_INACTIVE) | |
385 | xpc_activate_partition(part); | |
386 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
387 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
388 | ||
389 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
390 | if (part->act_state == XPC_P_AS_INACTIVE) | |
391 | xpc_activate_partition(part); | |
392 | else | |
393 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
394 | ||
395 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
396 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
397 | ||
398 | } else { | |
399 | BUG(); | |
400 | } | |
401 | ||
402 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
403 | if (xpc_activate_IRQ_rcvd == 0) | |
404 | break; | |
405 | } | |
406 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
407 | ||
408 | } | |
409 | ||
bd3e64c1 DN |
410 | static void |
411 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
412 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
413 | int *wakeup_hb_checker) | |
5b8669df DN |
414 | { |
415 | unsigned long irq_flags; | |
bd3e64c1 | 416 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 417 | struct xpc_openclose_args *args; |
5b8669df | 418 | |
bd3e64c1 | 419 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 420 | |
bd3e64c1 DN |
421 | switch (msg_hdr->type) { |
422 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
423 | /* syncing of remote_act_state was just done above */ | |
424 | break; | |
5b8669df | 425 | |
bd3e64c1 DN |
426 | case XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV: { |
427 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
5b8669df | 428 | |
bd3e64c1 DN |
429 | msg = container_of(msg_hdr, |
430 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
431 | hdr); | |
432 | part_uv->heartbeat = msg->heartbeat; | |
433 | break; | |
434 | } | |
435 | case XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV: { | |
436 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
437 | ||
438 | msg = container_of(msg_hdr, | |
439 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
440 | hdr); | |
441 | part_uv->heartbeat = msg->heartbeat; | |
442 | ||
443 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
444 | part_uv->flags |= XPC_P_HEARTBEAT_OFFLINE_UV; | |
445 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
446 | break; | |
447 | } | |
448 | case XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV: { | |
449 | struct xpc_activate_mq_msg_heartbeat_req_uv *msg; | |
450 | ||
451 | msg = container_of(msg_hdr, | |
452 | struct xpc_activate_mq_msg_heartbeat_req_uv, | |
453 | hdr); | |
454 | part_uv->heartbeat = msg->heartbeat; | |
455 | ||
456 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
457 | part_uv->flags &= ~XPC_P_HEARTBEAT_OFFLINE_UV; | |
458 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
459 | break; | |
460 | } | |
461 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { | |
462 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 463 | |
bd3e64c1 DN |
464 | /* |
465 | * ??? Do we deal here with ts_jiffies being different | |
466 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
467 | * ??? below? | |
468 | */ | |
469 | msg = container_of(msg_hdr, struct | |
470 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 471 | |
bd3e64c1 DN |
472 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
473 | if (part_uv->act_state_req == 0) | |
474 | xpc_activate_IRQ_rcvd++; | |
475 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
476 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
477 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
6f2584f4 JS |
478 | |
479 | if (msg->activate_gru_mq_desc_gpa != | |
480 | part_uv->activate_gru_mq_desc_gpa) { | |
481 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
482 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
483 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
484 | part_uv->activate_gru_mq_desc_gpa = | |
485 | msg->activate_gru_mq_desc_gpa; | |
486 | } | |
bd3e64c1 | 487 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
5b8669df | 488 | |
bd3e64c1 DN |
489 | (*wakeup_hb_checker)++; |
490 | break; | |
491 | } | |
492 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
493 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 494 | |
bd3e64c1 DN |
495 | msg = container_of(msg_hdr, struct |
496 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 497 | |
bd3e64c1 DN |
498 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
499 | if (part_uv->act_state_req == 0) | |
500 | xpc_activate_IRQ_rcvd++; | |
501 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
502 | part_uv->reason = msg->reason; | |
503 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
504 | ||
505 | (*wakeup_hb_checker)++; | |
506 | return; | |
507 | } | |
508 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
509 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 510 | |
bd3e64c1 DN |
511 | msg = container_of(msg_hdr, struct |
512 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
513 | hdr); | |
514 | args = &part->remote_openclose_args[msg->ch_number]; | |
515 | args->reason = msg->reason; | |
5b8669df | 516 | |
bd3e64c1 DN |
517 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
518 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
519 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 520 | |
bd3e64c1 DN |
521 | xpc_wakeup_channel_mgr(part); |
522 | break; | |
523 | } | |
524 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
525 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 526 | |
bd3e64c1 DN |
527 | msg = container_of(msg_hdr, struct |
528 | xpc_activate_mq_msg_chctl_closereply_uv, | |
529 | hdr); | |
5b8669df | 530 | |
bd3e64c1 DN |
531 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
532 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
533 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 534 | |
bd3e64c1 DN |
535 | xpc_wakeup_channel_mgr(part); |
536 | break; | |
537 | } | |
538 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { | |
539 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
540 | ||
541 | msg = container_of(msg_hdr, struct | |
542 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
543 | hdr); | |
544 | args = &part->remote_openclose_args[msg->ch_number]; | |
545 | args->entry_size = msg->entry_size; | |
546 | args->local_nentries = msg->local_nentries; | |
547 | ||
548 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
549 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
550 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
551 | ||
552 | xpc_wakeup_channel_mgr(part); | |
553 | break; | |
554 | } | |
555 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
556 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
557 | ||
558 | msg = container_of(msg_hdr, struct | |
559 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
560 | args = &part->remote_openclose_args[msg->ch_number]; | |
561 | args->remote_nentries = msg->remote_nentries; | |
562 | args->local_nentries = msg->local_nentries; | |
6f2584f4 | 563 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
bd3e64c1 DN |
564 | |
565 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
566 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
567 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
568 | ||
569 | xpc_wakeup_channel_mgr(part); | |
570 | break; | |
571 | } | |
572 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: | |
573 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
574 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
575 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
576 | break; | |
577 | ||
578 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
579 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
580 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
581 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
582 | break; | |
583 | ||
584 | default: | |
585 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
586 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
587 | ||
588 | /* get hb checker to deactivate from the remote partition */ | |
589 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
590 | if (part_uv->act_state_req == 0) | |
591 | xpc_activate_IRQ_rcvd++; | |
592 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
593 | part_uv->reason = xpBadMsgType; | |
594 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 595 | |
bd3e64c1 DN |
596 | (*wakeup_hb_checker)++; |
597 | return; | |
598 | } | |
5b8669df | 599 | |
bd3e64c1 DN |
600 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
601 | part->remote_rp_ts_jiffies != 0) { | |
602 | /* | |
603 | * ??? Does what we do here need to be sensitive to | |
604 | * ??? act_state or remote_act_state? | |
605 | */ | |
606 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
607 | if (part_uv->act_state_req == 0) | |
608 | xpc_activate_IRQ_rcvd++; | |
609 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
610 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 611 | |
bd3e64c1 DN |
612 | (*wakeup_hb_checker)++; |
613 | } | |
614 | } | |
615 | ||
616 | static irqreturn_t | |
617 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
618 | { | |
619 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
620 | short partid; | |
621 | struct xpc_partition *part; | |
622 | int wakeup_hb_checker = 0; | |
6f2584f4 | 623 | int part_referenced; |
bd3e64c1 | 624 | |
2525789b | 625 | while (1) { |
6f2584f4 | 626 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
2525789b DN |
627 | if (msg_hdr == NULL) |
628 | break; | |
bd3e64c1 DN |
629 | |
630 | partid = msg_hdr->partid; | |
631 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
632 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
633 | "received invalid partid=0x%x in message\n", | |
634 | partid); | |
635 | } else { | |
636 | part = &xpc_partitions[partid]; | |
6f2584f4 JS |
637 | |
638 | part_referenced = xpc_part_ref(part); | |
639 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
640 | &wakeup_hb_checker); | |
641 | if (part_referenced) | |
bd3e64c1 | 642 | xpc_part_deref(part); |
5b8669df DN |
643 | } |
644 | ||
6f2584f4 | 645 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
5b8669df DN |
646 | } |
647 | ||
648 | if (wakeup_hb_checker) | |
649 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
650 | ||
651 | return IRQ_HANDLED; | |
652 | } | |
653 | ||
6f2584f4 JS |
654 | static enum xp_retval |
655 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, | |
656 | unsigned long gru_mq_desc_gpa) | |
657 | { | |
658 | enum xp_retval ret; | |
659 | ||
660 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, | |
661 | sizeof(struct gru_message_queue_desc)); | |
662 | if (ret == xpSuccess) | |
663 | gru_mq_desc->mq = NULL; | |
664 | ||
665 | return ret; | |
666 | } | |
667 | ||
5b8669df DN |
668 | static enum xp_retval |
669 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
670 | int msg_type) | |
671 | { | |
672 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
6f2584f4 JS |
673 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
674 | struct gru_message_queue_desc *gru_mq_desc; | |
675 | unsigned long irq_flags; | |
676 | enum xp_retval ret; | |
5b8669df DN |
677 | |
678 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
679 | ||
680 | msg_hdr->type = msg_type; | |
6f2584f4 | 681 | msg_hdr->partid = xp_partition_id; |
5b8669df DN |
682 | msg_hdr->act_state = part->act_state; |
683 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
684 | ||
6f2584f4 JS |
685 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
686 | again: | |
687 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { | |
688 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; | |
689 | if (gru_mq_desc == NULL) { | |
690 | gru_mq_desc = kmalloc(sizeof(struct | |
691 | gru_message_queue_desc), | |
692 | GFP_KERNEL); | |
693 | if (gru_mq_desc == NULL) { | |
694 | ret = xpNoMemory; | |
695 | goto done; | |
696 | } | |
697 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; | |
698 | } | |
699 | ||
700 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, | |
701 | part_uv-> | |
702 | activate_gru_mq_desc_gpa); | |
703 | if (ret != xpSuccess) | |
704 | goto done; | |
705 | ||
706 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
707 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
708 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
709 | } | |
710 | ||
5b8669df | 711 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
6f2584f4 JS |
712 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
713 | msg_size); | |
714 | if (ret != xpSuccess) { | |
715 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ | |
716 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) | |
717 | goto again; | |
718 | } | |
719 | done: | |
720 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
721 | return ret; | |
5b8669df DN |
722 | } |
723 | ||
724 | static void | |
725 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
726 | size_t msg_size, int msg_type) | |
727 | { | |
728 | enum xp_retval ret; | |
729 | ||
730 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
731 | if (unlikely(ret != xpSuccess)) | |
732 | XPC_DEACTIVATE_PARTITION(part, ret); | |
733 | } | |
734 | ||
735 | static void | |
736 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
737 | void *msg, size_t msg_size, int msg_type) | |
738 | { | |
6f2584f4 | 739 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
5b8669df DN |
740 | enum xp_retval ret; |
741 | ||
742 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
743 | if (unlikely(ret != xpSuccess)) { | |
744 | if (irq_flags != NULL) | |
745 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
746 | ||
747 | XPC_DEACTIVATE_PARTITION(part, ret); | |
748 | ||
749 | if (irq_flags != NULL) | |
750 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
751 | } | |
752 | } | |
753 | ||
754 | static void | |
755 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
756 | { | |
757 | unsigned long irq_flags; | |
758 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
759 | ||
33ba3c77 | 760 | /* |
7d9d1f25 | 761 | * !!! Make our side think that the remote partition sent an activate |
5b8669df | 762 | * !!! message our way by doing what the activate IRQ handler would |
ea57f80c | 763 | * !!! do had one really been sent. |
33ba3c77 | 764 | */ |
5b8669df DN |
765 | |
766 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
767 | if (part_uv->act_state_req == 0) | |
768 | xpc_activate_IRQ_rcvd++; | |
769 | part_uv->act_state_req = act_state_req; | |
770 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
771 | ||
772 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
773 | } |
774 | ||
94bd2708 | 775 | static enum xp_retval |
5b8669df DN |
776 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
777 | size_t *len) | |
94bd2708 | 778 | { |
7d9d1f25 DN |
779 | s64 status; |
780 | enum xp_retval ret; | |
781 | ||
782 | #if defined CONFIG_X86_64 | |
783 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
784 | (u64 *)len); | |
785 | if (status == BIOS_STATUS_SUCCESS) | |
786 | ret = xpSuccess; | |
787 | else if (status == BIOS_STATUS_MORE_PASSES) | |
788 | ret = xpNeedMoreInfo; | |
789 | else | |
790 | ret = xpBiosError; | |
791 | ||
792 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
793 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
794 | if (status == SALRET_OK) | |
795 | ret = xpSuccess; | |
796 | else if (status == SALRET_MORE_PASSES) | |
797 | ret = xpNeedMoreInfo; | |
798 | else | |
799 | ret = xpSalError; | |
800 | ||
801 | #else | |
802 | #error not a supported configuration | |
803 | #endif | |
804 | ||
805 | return ret; | |
5b8669df DN |
806 | } |
807 | ||
808 | static int | |
809 | xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp) | |
810 | { | |
6f2584f4 JS |
811 | rp->sn.activate_gru_mq_desc_gpa = |
812 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); | |
5b8669df DN |
813 | return 0; |
814 | } | |
815 | ||
816 | static void | |
817 | xpc_send_heartbeat_uv(int msg_type) | |
818 | { | |
819 | short partid; | |
820 | struct xpc_partition *part; | |
821 | struct xpc_activate_mq_msg_heartbeat_req_uv msg; | |
822 | ||
823 | /* | |
824 | * !!! On uv we're broadcasting a heartbeat message every 5 seconds. | |
825 | * !!! Whereas on sn2 we're bte_copy'ng the heartbeat info every 20 | |
826 | * !!! seconds. This is an increase in numalink traffic. | |
827 | * ??? Is this good? | |
828 | */ | |
829 | ||
830 | msg.heartbeat = atomic64_inc_return(&xpc_heartbeat_uv); | |
831 | ||
832 | partid = find_first_bit(xpc_heartbeating_to_mask_uv, | |
833 | XP_MAX_NPARTITIONS_UV); | |
834 | ||
835 | while (partid < XP_MAX_NPARTITIONS_UV) { | |
836 | part = &xpc_partitions[partid]; | |
837 | ||
838 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
839 | msg_type); | |
840 | ||
841 | partid = find_next_bit(xpc_heartbeating_to_mask_uv, | |
842 | XP_MAX_NPARTITIONS_UV, partid + 1); | |
843 | } | |
94bd2708 DN |
844 | } |
845 | ||
33ba3c77 DN |
846 | static void |
847 | xpc_increment_heartbeat_uv(void) | |
848 | { | |
5b8669df DN |
849 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV); |
850 | } | |
851 | ||
852 | static void | |
853 | xpc_offline_heartbeat_uv(void) | |
854 | { | |
855 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV); | |
856 | } | |
857 | ||
858 | static void | |
859 | xpc_online_heartbeat_uv(void) | |
860 | { | |
861 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV); | |
33ba3c77 DN |
862 | } |
863 | ||
864 | static void | |
865 | xpc_heartbeat_init_uv(void) | |
866 | { | |
5b8669df | 867 | atomic64_set(&xpc_heartbeat_uv, 0); |
33ba3c77 DN |
868 | bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); |
869 | xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0]; | |
870 | } | |
871 | ||
872 | static void | |
873 | xpc_heartbeat_exit_uv(void) | |
874 | { | |
5b8669df DN |
875 | xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV); |
876 | } | |
877 | ||
878 | static enum xp_retval | |
879 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
880 | { | |
881 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
882 | enum xp_retval ret = xpNoHeartbeat; | |
883 | ||
884 | if (part_uv->remote_act_state != XPC_P_AS_INACTIVE && | |
885 | part_uv->remote_act_state != XPC_P_AS_DEACTIVATING) { | |
886 | ||
887 | if (part_uv->heartbeat != part->last_heartbeat || | |
888 | (part_uv->flags & XPC_P_HEARTBEAT_OFFLINE_UV)) { | |
889 | ||
890 | part->last_heartbeat = part_uv->heartbeat; | |
891 | ret = xpSuccess; | |
892 | } | |
893 | } | |
894 | return ret; | |
33ba3c77 DN |
895 | } |
896 | ||
897 | static void | |
a47d5dac | 898 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 899 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
900 | { |
901 | short partid = remote_rp->SAL_partid; | |
902 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 903 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 904 | |
5b8669df DN |
905 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
906 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
6f2584f4 JS |
907 | part->sn.uv.activate_gru_mq_desc_gpa = |
908 | remote_rp->sn.activate_gru_mq_desc_gpa; | |
5b8669df DN |
909 | |
910 | /* | |
911 | * ??? Is it a good idea to make this conditional on what is | |
912 | * ??? potentially stale state information? | |
913 | */ | |
914 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
915 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
6f2584f4 JS |
916 | msg.activate_gru_mq_desc_gpa = |
917 | xpc_rsvd_page->sn.activate_gru_mq_desc_gpa; | |
5b8669df DN |
918 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
919 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
920 | } | |
33ba3c77 | 921 | |
5b8669df DN |
922 | if (part->act_state == XPC_P_AS_INACTIVE) |
923 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
924 | } |
925 | ||
a47d5dac DN |
926 | static void |
927 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
928 | { | |
5b8669df DN |
929 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
930 | } | |
931 | ||
932 | static void | |
933 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
934 | { | |
935 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
936 | ||
937 | /* | |
938 | * ??? Is it a good idea to make this conditional on what is | |
939 | * ??? potentially stale state information? | |
940 | */ | |
941 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
942 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
943 | ||
944 | msg.reason = part->reason; | |
945 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
946 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
947 | } | |
a47d5dac DN |
948 | } |
949 | ||
bd3e64c1 DN |
950 | static void |
951 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
952 | { | |
953 | /* nothing needs to be done */ | |
954 | return; | |
955 | } | |
956 | ||
957 | static void | |
958 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
959 | { | |
960 | head->first = NULL; | |
961 | head->last = NULL; | |
962 | spin_lock_init(&head->lock); | |
963 | head->n_entries = 0; | |
964 | } | |
965 | ||
966 | static void * | |
967 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
968 | { | |
969 | unsigned long irq_flags; | |
970 | struct xpc_fifo_entry_uv *first; | |
971 | ||
972 | spin_lock_irqsave(&head->lock, irq_flags); | |
973 | first = head->first; | |
974 | if (head->first != NULL) { | |
975 | head->first = first->next; | |
976 | if (head->first == NULL) | |
977 | head->last = NULL; | |
978 | } | |
6f2584f4 JS |
979 | head->n_entries--; |
980 | BUG_ON(head->n_entries < 0); | |
bd3e64c1 DN |
981 | spin_unlock_irqrestore(&head->lock, irq_flags); |
982 | first->next = NULL; | |
983 | return first; | |
984 | } | |
985 | ||
986 | static void | |
987 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, | |
988 | struct xpc_fifo_entry_uv *last) | |
989 | { | |
990 | unsigned long irq_flags; | |
991 | ||
992 | last->next = NULL; | |
993 | spin_lock_irqsave(&head->lock, irq_flags); | |
994 | if (head->last != NULL) | |
995 | head->last->next = last; | |
996 | else | |
997 | head->first = last; | |
998 | head->last = last; | |
6f2584f4 | 999 | head->n_entries++; |
bd3e64c1 DN |
1000 | spin_unlock_irqrestore(&head->lock, irq_flags); |
1001 | } | |
1002 | ||
1003 | static int | |
1004 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) | |
1005 | { | |
1006 | return head->n_entries; | |
1007 | } | |
1008 | ||
e17d416b | 1009 | /* |
5b8669df | 1010 | * Setup the channel structures that are uv specific. |
e17d416b DN |
1011 | */ |
1012 | static enum xp_retval | |
5b8669df | 1013 | xpc_setup_ch_structures_sn_uv(struct xpc_partition *part) |
e17d416b | 1014 | { |
bd3e64c1 DN |
1015 | struct xpc_channel_uv *ch_uv; |
1016 | int ch_number; | |
1017 | ||
1018 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { | |
1019 | ch_uv = &part->channels[ch_number].sn.uv; | |
1020 | ||
1021 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1022 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1023 | } | |
1024 | ||
1025 | return xpSuccess; | |
e17d416b DN |
1026 | } |
1027 | ||
1028 | /* | |
5b8669df | 1029 | * Teardown the channel structures that are uv specific. |
e17d416b DN |
1030 | */ |
1031 | static void | |
5b8669df | 1032 | xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part) |
e17d416b | 1033 | { |
bd3e64c1 | 1034 | /* nothing needs to be done */ |
e17d416b DN |
1035 | return; |
1036 | } | |
1037 | ||
1038 | static enum xp_retval | |
1039 | xpc_make_first_contact_uv(struct xpc_partition *part) | |
1040 | { | |
5b8669df DN |
1041 | struct xpc_activate_mq_msg_uv msg; |
1042 | ||
1043 | /* | |
1044 | * We send a sync msg to get the remote partition's remote_act_state | |
1045 | * updated to our current act_state which at this point should | |
1046 | * be XPC_P_AS_ACTIVATING. | |
1047 | */ | |
1048 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1049 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); | |
1050 | ||
1051 | while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) { | |
1052 | ||
1053 | dev_dbg(xpc_part, "waiting to make first contact with " | |
1054 | "partition %d\n", XPC_PARTID(part)); | |
1055 | ||
1056 | /* wait a 1/4 of a second or so */ | |
1057 | (void)msleep_interruptible(250); | |
1058 | ||
1059 | if (part->act_state == XPC_P_AS_DEACTIVATING) | |
1060 | return part->reason; | |
1061 | } | |
1062 | ||
1063 | return xpSuccess; | |
e17d416b DN |
1064 | } |
1065 | ||
1066 | static u64 | |
7fb5e59d | 1067 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
e17d416b | 1068 | { |
5b8669df DN |
1069 | unsigned long irq_flags; |
1070 | union xpc_channel_ctl_flags chctl; | |
1071 | ||
1072 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1073 | chctl = part->chctl; | |
1074 | if (chctl.all_flags != 0) | |
1075 | part->chctl.all_flags = 0; | |
1076 | ||
1077 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1078 | return chctl.all_flags; | |
1079 | } | |
1080 | ||
bd3e64c1 DN |
1081 | static enum xp_retval |
1082 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) | |
1083 | { | |
1084 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1085 | struct xpc_send_msg_slot_uv *msg_slot; | |
1086 | unsigned long irq_flags; | |
1087 | int nentries; | |
1088 | int entry; | |
1089 | size_t nbytes; | |
1090 | ||
1091 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { | |
1092 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); | |
1093 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1094 | if (ch_uv->send_msg_slots == NULL) | |
1095 | continue; | |
1096 | ||
1097 | for (entry = 0; entry < nentries; entry++) { | |
1098 | msg_slot = &ch_uv->send_msg_slots[entry]; | |
1099 | ||
1100 | msg_slot->msg_slot_number = entry; | |
1101 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, | |
1102 | &msg_slot->next); | |
1103 | } | |
1104 | ||
1105 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1106 | if (nentries < ch->local_nentries) | |
1107 | ch->local_nentries = nentries; | |
1108 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1109 | return xpSuccess; | |
1110 | } | |
1111 | ||
1112 | return xpNoMemory; | |
1113 | } | |
1114 | ||
1115 | static enum xp_retval | |
1116 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) | |
1117 | { | |
1118 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1119 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1120 | unsigned long irq_flags; | |
1121 | int nentries; | |
1122 | int entry; | |
1123 | size_t nbytes; | |
1124 | ||
1125 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { | |
1126 | nbytes = nentries * ch->entry_size; | |
1127 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1128 | if (ch_uv->recv_msg_slots == NULL) | |
1129 | continue; | |
1130 | ||
1131 | for (entry = 0; entry < nentries; entry++) { | |
361916a9 DN |
1132 | msg_slot = ch_uv->recv_msg_slots + |
1133 | entry * ch->entry_size; | |
bd3e64c1 DN |
1134 | |
1135 | msg_slot->hdr.msg_slot_number = entry; | |
1136 | } | |
1137 | ||
1138 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1139 | if (nentries < ch->remote_nentries) | |
1140 | ch->remote_nentries = nentries; | |
1141 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1142 | return xpSuccess; | |
1143 | } | |
1144 | ||
1145 | return xpNoMemory; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Allocate msg_slots associated with the channel. | |
1150 | */ | |
5b8669df DN |
1151 | static enum xp_retval |
1152 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) | |
1153 | { | |
bd3e64c1 DN |
1154 | static enum xp_retval ret; |
1155 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1156 | ||
1157 | DBUG_ON(ch->flags & XPC_C_SETUP); | |
1158 | ||
6f2584f4 JS |
1159 | ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct |
1160 | gru_message_queue_desc), | |
1161 | GFP_KERNEL); | |
1162 | if (ch_uv->cached_notify_gru_mq_desc == NULL) | |
1163 | return xpNoMemory; | |
1164 | ||
bd3e64c1 DN |
1165 | ret = xpc_allocate_send_msg_slot_uv(ch); |
1166 | if (ret == xpSuccess) { | |
1167 | ||
1168 | ret = xpc_allocate_recv_msg_slot_uv(ch); | |
1169 | if (ret != xpSuccess) { | |
1170 | kfree(ch_uv->send_msg_slots); | |
1171 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1172 | } | |
1173 | } | |
1174 | return ret; | |
5b8669df DN |
1175 | } |
1176 | ||
bd3e64c1 DN |
1177 | /* |
1178 | * Free up msg_slots and clear other stuff that were setup for the specified | |
1179 | * channel. | |
1180 | */ | |
5b8669df DN |
1181 | static void |
1182 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) | |
1183 | { | |
1184 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1185 | ||
bd3e64c1 DN |
1186 | DBUG_ON(!spin_is_locked(&ch->lock)); |
1187 | ||
6f2584f4 JS |
1188 | kfree(ch_uv->cached_notify_gru_mq_desc); |
1189 | ch_uv->cached_notify_gru_mq_desc = NULL; | |
5b8669df | 1190 | |
bd3e64c1 DN |
1191 | if (ch->flags & XPC_C_SETUP) { |
1192 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1193 | kfree(ch_uv->send_msg_slots); | |
1194 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1195 | kfree(ch_uv->recv_msg_slots); | |
1196 | } | |
5b8669df DN |
1197 | } |
1198 | ||
1199 | static void | |
1200 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1201 | { | |
1202 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; | |
1203 | ||
1204 | msg.ch_number = ch->number; | |
1205 | msg.reason = ch->reason; | |
1206 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1207 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); | |
1208 | } | |
1209 | ||
1210 | static void | |
1211 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1212 | { | |
1213 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; | |
1214 | ||
1215 | msg.ch_number = ch->number; | |
1216 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1217 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); | |
1218 | } | |
1219 | ||
1220 | static void | |
1221 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1222 | { | |
1223 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; | |
1224 | ||
1225 | msg.ch_number = ch->number; | |
bd3e64c1 | 1226 | msg.entry_size = ch->entry_size; |
5b8669df DN |
1227 | msg.local_nentries = ch->local_nentries; |
1228 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1229 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); | |
1230 | } | |
1231 | ||
1232 | static void | |
1233 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1234 | { | |
1235 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; | |
1236 | ||
1237 | msg.ch_number = ch->number; | |
1238 | msg.local_nentries = ch->local_nentries; | |
1239 | msg.remote_nentries = ch->remote_nentries; | |
6f2584f4 | 1240 | msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); |
5b8669df DN |
1241 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
1242 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); | |
1243 | } | |
1244 | ||
bd3e64c1 DN |
1245 | static void |
1246 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1247 | { | |
1248 | unsigned long irq_flags; | |
1249 | ||
1250 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1251 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1252 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1253 | ||
1254 | xpc_wakeup_channel_mgr(part); | |
1255 | } | |
1256 | ||
6f2584f4 | 1257 | static enum xp_retval |
5b8669df | 1258 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
6f2584f4 | 1259 | unsigned long gru_mq_desc_gpa) |
5b8669df | 1260 | { |
6f2584f4 JS |
1261 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
1262 | ||
1263 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); | |
1264 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, | |
1265 | gru_mq_desc_gpa); | |
5b8669df DN |
1266 | } |
1267 | ||
1268 | static void | |
1269 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1270 | { | |
1271 | struct xpc_activate_mq_msg_uv msg; | |
1272 | ||
1273 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1274 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1275 | } | |
1276 | ||
1277 | static void | |
1278 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1279 | { | |
1280 | struct xpc_activate_mq_msg_uv msg; | |
1281 | ||
1282 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1283 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1284 | } | |
1285 | ||
1286 | static void | |
1287 | xpc_assume_partition_disengaged_uv(short partid) | |
1288 | { | |
1289 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1290 | unsigned long irq_flags; | |
1291 | ||
1292 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1293 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1294 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1295 | } | |
1296 | ||
1297 | static int | |
1298 | xpc_partition_engaged_uv(short partid) | |
1299 | { | |
1300 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1301 | } | |
1302 | ||
1303 | static int | |
1304 | xpc_any_partition_engaged_uv(void) | |
1305 | { | |
1306 | struct xpc_partition_uv *part_uv; | |
1307 | short partid; | |
1308 | ||
1309 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1310 | part_uv = &xpc_partitions[partid].sn.uv; | |
1311 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1312 | return 1; | |
1313 | } | |
1314 | return 0; | |
e17d416b DN |
1315 | } |
1316 | ||
bd3e64c1 DN |
1317 | static enum xp_retval |
1318 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1319 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1320 | { | |
1321 | enum xp_retval ret; | |
1322 | struct xpc_send_msg_slot_uv *msg_slot; | |
1323 | struct xpc_fifo_entry_uv *entry; | |
1324 | ||
1325 | while (1) { | |
1326 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1327 | if (entry != NULL) | |
1328 | break; | |
1329 | ||
1330 | if (flags & XPC_NOWAIT) | |
1331 | return xpNoWait; | |
1332 | ||
1333 | ret = xpc_allocate_msg_wait(ch); | |
1334 | if (ret != xpInterrupted && ret != xpTimeout) | |
1335 | return ret; | |
1336 | } | |
1337 | ||
1338 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1339 | *address_of_msg_slot = msg_slot; | |
1340 | return xpSuccess; | |
1341 | } | |
1342 | ||
1343 | static void | |
1344 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1345 | struct xpc_send_msg_slot_uv *msg_slot) | |
1346 | { | |
1347 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1348 | ||
1349 | /* wakeup anyone waiting for a free msg slot */ | |
1350 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1351 | wake_up(&ch->msg_allocate_wq); | |
1352 | } | |
1353 | ||
1354 | static void | |
1355 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1356 | struct xpc_send_msg_slot_uv *msg_slot, | |
1357 | enum xp_retval reason) | |
1358 | { | |
1359 | xpc_notify_func func = msg_slot->func; | |
1360 | ||
1361 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1362 | ||
1363 | atomic_dec(&ch->n_to_notify); | |
1364 | ||
1365 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1366 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1367 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1368 | ||
1369 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1370 | ||
1371 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1372 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1373 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | static void | |
1378 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1379 | struct xpc_notify_mq_msg_uv *msg) | |
1380 | { | |
1381 | struct xpc_send_msg_slot_uv *msg_slot; | |
1382 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1383 | ||
1384 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1385 | ||
1386 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1387 | msg_slot->msg_slot_number += ch->local_nentries; | |
1388 | ||
1389 | if (msg_slot->func != NULL) | |
1390 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1391 | ||
1392 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1393 | } | |
1394 | ||
1395 | static void | |
1396 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1397 | struct xpc_notify_mq_msg_uv *msg) | |
1398 | { | |
1399 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1400 | struct xpc_channel *ch; | |
1401 | struct xpc_channel_uv *ch_uv; | |
1402 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1403 | unsigned long irq_flags; | |
1404 | int ch_number = msg->hdr.ch_number; | |
1405 | ||
1406 | if (unlikely(ch_number >= part->nchannels)) { | |
1407 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1408 | "channel number=0x%x in message from partid=%d\n", | |
1409 | ch_number, XPC_PARTID(part)); | |
1410 | ||
1411 | /* get hb checker to deactivate from the remote partition */ | |
1412 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1413 | if (part_uv->act_state_req == 0) | |
1414 | xpc_activate_IRQ_rcvd++; | |
1415 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1416 | part_uv->reason = xpBadChannelNumber; | |
1417 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1418 | ||
1419 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | ch = &part->channels[ch_number]; | |
1424 | xpc_msgqueue_ref(ch); | |
1425 | ||
1426 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1427 | xpc_msgqueue_deref(ch); | |
1428 | return; | |
1429 | } | |
1430 | ||
1431 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1432 | if (msg->hdr.size == 0) { | |
1433 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1434 | xpc_msgqueue_deref(ch); | |
1435 | return; | |
1436 | } | |
1437 | ||
1438 | /* we're dealing with a normal message sent via the notify_mq */ | |
1439 | ch_uv = &ch->sn.uv; | |
1440 | ||
361916a9 DN |
1441 | msg_slot = ch_uv->recv_msg_slots + |
1442 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; | |
bd3e64c1 DN |
1443 | |
1444 | BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number); | |
1445 | BUG_ON(msg_slot->hdr.size != 0); | |
1446 | ||
1447 | memcpy(msg_slot, msg, msg->hdr.size); | |
1448 | ||
1449 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1450 | ||
1451 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1452 | /* | |
1453 | * If there is an existing idle kthread get it to deliver | |
1454 | * the payload, otherwise we'll have to get the channel mgr | |
1455 | * for this partition to create a kthread to do the delivery. | |
1456 | */ | |
1457 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1458 | wake_up_nr(&ch->idle_wq, 1); | |
1459 | else | |
1460 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1461 | } | |
1462 | xpc_msgqueue_deref(ch); | |
1463 | } | |
1464 | ||
1465 | static irqreturn_t | |
1466 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1467 | { | |
1468 | struct xpc_notify_mq_msg_uv *msg; | |
1469 | short partid; | |
1470 | struct xpc_partition *part; | |
1471 | ||
6f2584f4 JS |
1472 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
1473 | NULL) { | |
bd3e64c1 DN |
1474 | |
1475 | partid = msg->hdr.partid; | |
1476 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1477 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1478 | "invalid partid=0x%x in message\n", partid); | |
1479 | } else { | |
1480 | part = &xpc_partitions[partid]; | |
1481 | ||
1482 | if (xpc_part_ref(part)) { | |
1483 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1484 | xpc_part_deref(part); | |
1485 | } | |
1486 | } | |
1487 | ||
6f2584f4 | 1488 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
bd3e64c1 DN |
1489 | } |
1490 | ||
1491 | return IRQ_HANDLED; | |
1492 | } | |
1493 | ||
1494 | static int | |
1495 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1496 | { | |
1497 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1498 | } | |
1499 | ||
1500 | static void | |
1501 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1502 | { | |
1503 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1504 | int ndeliverable_payloads; | |
1505 | ||
1506 | xpc_msgqueue_ref(ch); | |
1507 | ||
1508 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1509 | ||
1510 | if (ndeliverable_payloads > 0 && | |
1511 | (ch->flags & XPC_C_CONNECTED) && | |
1512 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1513 | ||
1514 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1515 | } | |
1516 | ||
1517 | xpc_msgqueue_deref(ch); | |
1518 | } | |
1519 | ||
1520 | static enum xp_retval | |
1521 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1522 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1523 | void *key) | |
1524 | { | |
1525 | enum xp_retval ret = xpSuccess; | |
1526 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1527 | struct xpc_notify_mq_msg_uv *msg; | |
1528 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1529 | size_t msg_size; | |
1530 | ||
1531 | DBUG_ON(notify_type != XPC_N_CALL); | |
1532 | ||
1533 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1534 | if (msg_size > ch->entry_size) | |
1535 | return xpPayloadTooBig; | |
1536 | ||
1537 | xpc_msgqueue_ref(ch); | |
1538 | ||
1539 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1540 | ret = ch->reason; | |
1541 | goto out_1; | |
1542 | } | |
1543 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1544 | ret = xpNotConnected; | |
1545 | goto out_1; | |
1546 | } | |
1547 | ||
1548 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1549 | if (ret != xpSuccess) | |
1550 | goto out_1; | |
1551 | ||
1552 | if (func != NULL) { | |
1553 | atomic_inc(&ch->n_to_notify); | |
1554 | ||
1555 | msg_slot->key = key; | |
69b3bb65 | 1556 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
bd3e64c1 DN |
1557 | msg_slot->func = func; |
1558 | ||
1559 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1560 | ret = ch->reason; | |
1561 | goto out_2; | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1566 | msg->hdr.partid = xp_partition_id; | |
1567 | msg->hdr.ch_number = ch->number; | |
1568 | msg->hdr.size = msg_size; | |
1569 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1570 | memcpy(&msg->payload, payload, payload_size); | |
1571 | ||
6f2584f4 JS |
1572 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
1573 | msg_size); | |
bd3e64c1 DN |
1574 | if (ret == xpSuccess) |
1575 | goto out_1; | |
1576 | ||
1577 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1578 | out_2: | |
1579 | if (func != NULL) { | |
1580 | /* | |
1581 | * Try to NULL the msg_slot's func field. If we fail, then | |
1582 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1583 | * case we need to pretend we succeeded to send the message | |
1584 | * since the user will get a callout for the disconnect error | |
1585 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1586 | * error returned here will confuse them. Additionally, since | |
1587 | * in this case the channel is being disconnected we don't need | |
1588 | * to put the the msg_slot back on the free list. | |
1589 | */ | |
1590 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1591 | ret = xpSuccess; | |
1592 | goto out_1; | |
1593 | } | |
1594 | ||
1595 | msg_slot->key = NULL; | |
1596 | atomic_dec(&ch->n_to_notify); | |
1597 | } | |
1598 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1599 | out_1: | |
1600 | xpc_msgqueue_deref(ch); | |
1601 | return ret; | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1606 | * is unknown because the channel is now disconnecting. | |
1607 | * | |
1608 | * We don't worry about putting these msg_slots on the free list since the | |
1609 | * msg_slots themselves are about to be kfree'd. | |
1610 | */ | |
1611 | static void | |
1612 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1613 | { | |
1614 | struct xpc_send_msg_slot_uv *msg_slot; | |
1615 | int entry; | |
1616 | ||
1617 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1618 | ||
1619 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1620 | ||
1621 | if (atomic_read(&ch->n_to_notify) == 0) | |
1622 | break; | |
1623 | ||
1624 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1625 | if (msg_slot->func != NULL) | |
1626 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | /* | |
1631 | * Get the next deliverable message's payload. | |
1632 | */ | |
1633 | static void * | |
1634 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1635 | { | |
1636 | struct xpc_fifo_entry_uv *entry; | |
1637 | struct xpc_notify_mq_msg_uv *msg; | |
1638 | void *payload = NULL; | |
1639 | ||
1640 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1641 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1642 | if (entry != NULL) { | |
1643 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1644 | hdr.u.next); | |
1645 | payload = &msg->payload; | |
1646 | } | |
1647 | } | |
1648 | return payload; | |
1649 | } | |
1650 | ||
1651 | static void | |
1652 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1653 | { |
bd3e64c1 DN |
1654 | struct xpc_notify_mq_msg_uv *msg; |
1655 | enum xp_retval ret; | |
1656 | ||
1657 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1658 | ||
1659 | /* return an ACK to the sender of this message */ | |
1660 | ||
1661 | msg->hdr.partid = xp_partition_id; | |
1662 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1663 | ||
6f2584f4 | 1664 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
bd3e64c1 DN |
1665 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
1666 | if (ret != xpSuccess) | |
1667 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1668 | ||
1669 | msg->hdr.msg_slot_number += ch->remote_nentries; | |
e17d416b DN |
1670 | } |
1671 | ||
5b8669df | 1672 | int |
94bd2708 DN |
1673 | xpc_init_uv(void) |
1674 | { | |
5b8669df | 1675 | xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv; |
6f2584f4 | 1676 | xpc_teardown_partitions_sn = xpc_teardown_partitions_sn_uv; |
5b8669df DN |
1677 | xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv; |
1678 | xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv; | |
1679 | xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv; | |
33ba3c77 | 1680 | xpc_increment_heartbeat = xpc_increment_heartbeat_uv; |
5b8669df DN |
1681 | xpc_offline_heartbeat = xpc_offline_heartbeat_uv; |
1682 | xpc_online_heartbeat = xpc_online_heartbeat_uv; | |
33ba3c77 DN |
1683 | xpc_heartbeat_init = xpc_heartbeat_init_uv; |
1684 | xpc_heartbeat_exit = xpc_heartbeat_exit_uv; | |
5b8669df DN |
1685 | xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_uv; |
1686 | ||
a47d5dac DN |
1687 | xpc_request_partition_activation = xpc_request_partition_activation_uv; |
1688 | xpc_request_partition_reactivation = | |
1689 | xpc_request_partition_reactivation_uv; | |
5b8669df DN |
1690 | xpc_request_partition_deactivation = |
1691 | xpc_request_partition_deactivation_uv; | |
bd3e64c1 DN |
1692 | xpc_cancel_partition_deactivation_request = |
1693 | xpc_cancel_partition_deactivation_request_uv; | |
5b8669df DN |
1694 | |
1695 | xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv; | |
1696 | xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv; | |
1697 | ||
e17d416b | 1698 | xpc_make_first_contact = xpc_make_first_contact_uv; |
5b8669df | 1699 | |
7fb5e59d | 1700 | xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv; |
5b8669df DN |
1701 | xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_uv; |
1702 | xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv; | |
1703 | xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv; | |
1704 | xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv; | |
1705 | ||
1706 | xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv; | |
1707 | ||
1708 | xpc_setup_msg_structures = xpc_setup_msg_structures_uv; | |
1709 | xpc_teardown_msg_structures = xpc_teardown_msg_structures_uv; | |
1710 | ||
1711 | xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_uv; | |
1712 | xpc_indicate_partition_disengaged = | |
1713 | xpc_indicate_partition_disengaged_uv; | |
1714 | xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_uv; | |
1715 | xpc_partition_engaged = xpc_partition_engaged_uv; | |
1716 | xpc_any_partition_engaged = xpc_any_partition_engaged_uv; | |
1717 | ||
bd3e64c1 DN |
1718 | xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv; |
1719 | xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv; | |
1720 | xpc_send_payload = xpc_send_payload_uv; | |
1721 | xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv; | |
1722 | xpc_get_deliverable_payload = xpc_get_deliverable_payload_uv; | |
1723 | xpc_received_payload = xpc_received_payload_uv; | |
1724 | ||
1725 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1726 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1727 | XPC_MSG_HDR_MAX_SIZE); | |
1728 | return -E2BIG; | |
1729 | } | |
5b8669df | 1730 | |
2525789b DN |
1731 | xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, |
1732 | XPC_ACTIVATE_IRQ_NAME, | |
5b8669df | 1733 | xpc_handle_activate_IRQ_uv); |
2525789b DN |
1734 | if (IS_ERR(xpc_activate_mq_uv)) |
1735 | return PTR_ERR(xpc_activate_mq_uv); | |
5b8669df | 1736 | |
2525789b DN |
1737 | xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, |
1738 | XPC_NOTIFY_IRQ_NAME, | |
bd3e64c1 | 1739 | xpc_handle_notify_IRQ_uv); |
2525789b DN |
1740 | if (IS_ERR(xpc_notify_mq_uv)) { |
1741 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1742 | return PTR_ERR(xpc_notify_mq_uv); | |
bd3e64c1 DN |
1743 | } |
1744 | ||
5b8669df | 1745 | return 0; |
94bd2708 DN |
1746 | } |
1747 | ||
1748 | void | |
1749 | xpc_exit_uv(void) | |
1750 | { | |
2525789b DN |
1751 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1752 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1753 | } |