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Commit | Line | Data |
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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> | |
7838f994 RH |
21 | #include <linux/cpu.h> |
22 | #include <linux/module.h> | |
2525789b | 23 | #include <linux/err.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
98fa15f3 | 25 | #include <linux/numa.h> |
261f3b49 | 26 | #include <asm/uv/uv_hub.h> |
2525789b DN |
27 | #if defined CONFIG_X86_64 |
28 | #include <asm/uv/bios.h> | |
29 | #include <asm/uv/uv_irq.h> | |
30 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
31 | #include <asm/sn/intr.h> | |
32 | #include <asm/sn/sn_sal.h> | |
33 | #endif | |
5b8669df | 34 | #include "../sgi-gru/gru.h" |
261f3b49 | 35 | #include "../sgi-gru/grukservices.h" |
94bd2708 DN |
36 | #include "xpc.h" |
37 | ||
6f2584f4 JS |
38 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
39 | struct uv_IO_APIC_route_entry { | |
40 | __u64 vector : 8, | |
41 | delivery_mode : 3, | |
42 | dest_mode : 1, | |
43 | delivery_status : 1, | |
44 | polarity : 1, | |
45 | __reserved_1 : 1, | |
46 | trigger : 1, | |
47 | mask : 1, | |
48 | __reserved_2 : 15, | |
49 | dest : 32; | |
50 | }; | |
51 | #endif | |
52 | ||
a374c57b | 53 | static struct xpc_heartbeat_uv *xpc_heartbeat_uv; |
33ba3c77 | 54 | |
5b8669df | 55 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
56 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
57 | XPC_ACTIVATE_MSG_SIZE_UV) | |
58 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 59 | |
2525789b DN |
60 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
61 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
62 | XPC_NOTIFY_MSG_SIZE_UV) | |
63 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 64 | |
98fa15f3 | 65 | static int xpc_mq_node = NUMA_NO_NODE; |
7838f994 | 66 | |
2525789b DN |
67 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
68 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
69 | |
70 | static int | |
a7665b0a | 71 | xpc_setup_partitions_uv(void) |
5b8669df DN |
72 | { |
73 | short partid; | |
74 | struct xpc_partition_uv *part_uv; | |
75 | ||
76 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
77 | part_uv = &xpc_partitions[partid].sn.uv; | |
78 | ||
6f2584f4 | 79 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
5b8669df DN |
80 | spin_lock_init(&part_uv->flags_lock); |
81 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
82 | } | |
83 | return 0; | |
84 | } | |
85 | ||
6f2584f4 | 86 | static void |
a7665b0a | 87 | xpc_teardown_partitions_uv(void) |
6f2584f4 JS |
88 | { |
89 | short partid; | |
90 | struct xpc_partition_uv *part_uv; | |
91 | unsigned long irq_flags; | |
92 | ||
93 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
94 | part_uv = &xpc_partitions[partid].sn.uv; | |
95 | ||
96 | if (part_uv->cached_activate_gru_mq_desc != NULL) { | |
97 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
98 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
99 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
100 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
101 | kfree(part_uv->cached_activate_gru_mq_desc); | |
102 | part_uv->cached_activate_gru_mq_desc = NULL; | |
103 | mutex_unlock(&part_uv-> | |
104 | cached_activate_gru_mq_desc_mutex); | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
2525789b DN |
109 | static int |
110 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
111 | { | |
6f2584f4 JS |
112 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
113 | ||
2525789b | 114 | #if defined CONFIG_X86_64 |
6c2c5029 DS |
115 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset, |
116 | UV_AFFINITY_CPU); | |
7838f994 | 117 | if (mq->irq < 0) |
6f2584f4 | 118 | return mq->irq; |
2525789b | 119 | |
6f2584f4 | 120 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
2525789b | 121 | |
6f2584f4 | 122 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
2525789b DN |
123 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
124 | mq->irq = SGI_XPC_ACTIVATE; | |
125 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
126 | mq->irq = SGI_XPC_NOTIFY; | |
127 | else | |
128 | return -EINVAL; | |
129 | ||
6f2584f4 JS |
130 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
131 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); | |
2525789b DN |
132 | #else |
133 | #error not a supported configuration | |
134 | #endif | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static void | |
140 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
141 | { | |
142 | #if defined CONFIG_X86_64 | |
6c2c5029 | 143 | uv_teardown_irq(mq->irq); |
2525789b DN |
144 | |
145 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
146 | int mmr_pnode; | |
147 | unsigned long mmr_value; | |
148 | ||
149 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
150 | mmr_value = 1UL << 16; | |
151 | ||
152 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
153 | #else | |
154 | #error not a supported configuration | |
155 | #endif | |
156 | } | |
157 | ||
158 | static int | |
159 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
160 | { | |
161 | int ret; | |
162 | ||
c2c9f115 RH |
163 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
164 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
165 | ||
166 | ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address), | |
c8182f00 | 167 | mq->order, &mq->mmr_offset); |
2525789b DN |
168 | if (ret < 0) { |
169 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
170 | ret); | |
171 | return -EBUSY; | |
172 | } | |
c2c9f115 RH |
173 | #elif defined CONFIG_X86_64 |
174 | ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address), | |
175 | mq->order, &mq->mmr_offset); | |
176 | if (ret < 0) { | |
177 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
178 | "ret=%d\n", ret); | |
179 | return ret; | |
180 | } | |
2525789b DN |
181 | #else |
182 | #error not a supported configuration | |
183 | #endif | |
184 | ||
185 | mq->watchlist_num = ret; | |
186 | return 0; | |
187 | } | |
188 | ||
189 | static void | |
190 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
191 | { | |
192 | int ret; | |
c2c9f115 | 193 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
2525789b DN |
194 | |
195 | #if defined CONFIG_X86_64 | |
c2c9f115 | 196 | ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
2525789b DN |
197 | BUG_ON(ret != BIOS_STATUS_SUCCESS); |
198 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
c2c9f115 | 199 | ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
2525789b DN |
200 | BUG_ON(ret != SALRET_OK); |
201 | #else | |
202 | #error not a supported configuration | |
203 | #endif | |
204 | } | |
205 | ||
206 | static struct xpc_gru_mq_uv * | |
207 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
208 | irq_handler_t irq_handler) |
209 | { | |
2525789b | 210 | enum xp_retval xp_ret; |
5b8669df DN |
211 | int ret; |
212 | int nid; | |
57e6d258 | 213 | int nasid; |
2525789b | 214 | int pg_order; |
5b8669df | 215 | struct page *page; |
2525789b | 216 | struct xpc_gru_mq_uv *mq; |
6f2584f4 | 217 | struct uv_IO_APIC_route_entry *mmr_value; |
2525789b DN |
218 | |
219 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
220 | if (mq == NULL) { | |
221 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
222 | "a xpc_gru_mq_uv structure\n"); | |
223 | ret = -ENOMEM; | |
6f2584f4 JS |
224 | goto out_0; |
225 | } | |
226 | ||
227 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), | |
228 | GFP_KERNEL); | |
229 | if (mq->gru_mq_desc == NULL) { | |
230 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
231 | "a gru_message_queue_desc structure\n"); | |
232 | ret = -ENOMEM; | |
2525789b DN |
233 | goto out_1; |
234 | } | |
5b8669df | 235 | |
2525789b DN |
236 | pg_order = get_order(mq_size); |
237 | mq->order = pg_order + PAGE_SHIFT; | |
238 | mq_size = 1UL << mq->order; | |
239 | ||
240 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
241 | ||
242 | nid = cpu_to_node(cpu); | |
96db800f | 243 | page = __alloc_pages_node(nid, |
e97ca8e5 | 244 | GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE, |
7838f994 | 245 | pg_order); |
bd3e64c1 DN |
246 | if (page == NULL) { |
247 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
248 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
249 | ret = -ENOMEM; |
250 | goto out_2; | |
bd3e64c1 | 251 | } |
2525789b | 252 | mq->address = page_address(page); |
5b8669df | 253 | |
2525789b DN |
254 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
255 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
256 | if (ret != 0) | |
257 | goto out_3; | |
5b8669df | 258 | |
2525789b DN |
259 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
260 | if (ret != 0) | |
261 | goto out_4; | |
262 | ||
263 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
264 | if (ret != 0) { |
265 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
6f2584f4 | 266 | mq->irq, -ret); |
2525789b | 267 | goto out_5; |
5b8669df DN |
268 | } |
269 | ||
57e6d258 RH |
270 | nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu)); |
271 | ||
6f2584f4 JS |
272 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
273 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, | |
57e6d258 | 274 | nasid, mmr_value->vector, mmr_value->dest); |
6f2584f4 JS |
275 | if (ret != 0) { |
276 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
277 | "error=%d\n", ret); | |
278 | ret = -EINVAL; | |
279 | goto out_6; | |
280 | } | |
281 | ||
2525789b DN |
282 | /* allow other partitions to access this GRU mq */ |
283 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
284 | if (xp_ret != xpSuccess) { | |
285 | ret = -EACCES; | |
286 | goto out_6; | |
287 | } | |
5b8669df DN |
288 | |
289 | return mq; | |
2525789b DN |
290 | |
291 | /* something went wrong */ | |
292 | out_6: | |
293 | free_irq(mq->irq, NULL); | |
294 | out_5: | |
295 | xpc_release_gru_mq_irq_uv(mq); | |
296 | out_4: | |
297 | xpc_gru_mq_watchlist_free_uv(mq); | |
298 | out_3: | |
299 | free_pages((unsigned long)mq->address, pg_order); | |
300 | out_2: | |
6f2584f4 | 301 | kfree(mq->gru_mq_desc); |
2525789b | 302 | out_1: |
6f2584f4 JS |
303 | kfree(mq); |
304 | out_0: | |
2525789b | 305 | return ERR_PTR(ret); |
5b8669df | 306 | } |
94bd2708 | 307 | |
33ba3c77 | 308 | static void |
2525789b | 309 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 310 | { |
2525789b DN |
311 | unsigned int mq_size; |
312 | int pg_order; | |
313 | int ret; | |
314 | ||
315 | /* disallow other partitions to access GRU mq */ | |
316 | mq_size = 1UL << mq->order; | |
317 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
318 | BUG_ON(ret != xpSuccess); | |
319 | ||
320 | /* unregister irq handler and release mq irq/vector mapping */ | |
321 | free_irq(mq->irq, NULL); | |
322 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 323 | |
2525789b DN |
324 | /* disable generation of irq when GRU mq op occurs to this mq */ |
325 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 326 | |
2525789b DN |
327 | pg_order = mq->order - PAGE_SHIFT; |
328 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 329 | |
2525789b | 330 | kfree(mq); |
5b8669df DN |
331 | } |
332 | ||
333 | static enum xp_retval | |
6f2584f4 JS |
334 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
335 | size_t msg_size) | |
33ba3c77 | 336 | { |
5b8669df DN |
337 | enum xp_retval xp_ret; |
338 | int ret; | |
339 | ||
340 | while (1) { | |
6f2584f4 | 341 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
5b8669df DN |
342 | if (ret == MQE_OK) { |
343 | xp_ret = xpSuccess; | |
344 | break; | |
345 | } | |
346 | ||
347 | if (ret == MQE_QUEUE_FULL) { | |
348 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
349 | "error=MQE_QUEUE_FULL\n"); | |
350 | /* !!! handle QLimit reached; delay & try again */ | |
351 | /* ??? Do we add a limit to the number of retries? */ | |
352 | (void)msleep_interruptible(10); | |
353 | } else if (ret == MQE_CONGESTION) { | |
354 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
355 | "error=MQE_CONGESTION\n"); | |
356 | /* !!! handle LB Overflow; simply try again */ | |
357 | /* ??? Do we add a limit to the number of retries? */ | |
358 | } else { | |
359 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
360 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
361 | "error=%d\n", ret); | |
362 | xp_ret = xpGruSendMqError; | |
363 | break; | |
364 | } | |
365 | } | |
366 | return xp_ret; | |
367 | } | |
368 | ||
369 | static void | |
370 | xpc_process_activate_IRQ_rcvd_uv(void) | |
371 | { | |
372 | unsigned long irq_flags; | |
373 | short partid; | |
374 | struct xpc_partition *part; | |
375 | u8 act_state_req; | |
376 | ||
377 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
378 | ||
379 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
380 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
381 | part = &xpc_partitions[partid]; | |
382 | ||
383 | if (part->sn.uv.act_state_req == 0) | |
384 | continue; | |
385 | ||
386 | xpc_activate_IRQ_rcvd--; | |
387 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
388 | ||
389 | act_state_req = part->sn.uv.act_state_req; | |
390 | part->sn.uv.act_state_req = 0; | |
391 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
392 | ||
393 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
394 | if (part->act_state == XPC_P_AS_INACTIVE) | |
395 | xpc_activate_partition(part); | |
396 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
397 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
398 | ||
399 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
400 | if (part->act_state == XPC_P_AS_INACTIVE) | |
401 | xpc_activate_partition(part); | |
402 | else | |
403 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
404 | ||
405 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
406 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
407 | ||
408 | } else { | |
409 | BUG(); | |
410 | } | |
411 | ||
412 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
413 | if (xpc_activate_IRQ_rcvd == 0) | |
414 | break; | |
415 | } | |
416 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
417 | ||
418 | } | |
419 | ||
bd3e64c1 DN |
420 | static void |
421 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
422 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
09358972 | 423 | int part_setup, |
bd3e64c1 | 424 | int *wakeup_hb_checker) |
5b8669df DN |
425 | { |
426 | unsigned long irq_flags; | |
bd3e64c1 | 427 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 428 | struct xpc_openclose_args *args; |
5b8669df | 429 | |
bd3e64c1 | 430 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 431 | |
bd3e64c1 DN |
432 | switch (msg_hdr->type) { |
433 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
434 | /* syncing of remote_act_state was just done above */ | |
435 | break; | |
5b8669df | 436 | |
bd3e64c1 DN |
437 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { |
438 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 439 | |
bd3e64c1 DN |
440 | /* |
441 | * ??? Do we deal here with ts_jiffies being different | |
442 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
443 | * ??? below? | |
444 | */ | |
445 | msg = container_of(msg_hdr, struct | |
446 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 447 | |
bd3e64c1 DN |
448 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
449 | if (part_uv->act_state_req == 0) | |
450 | xpc_activate_IRQ_rcvd++; | |
451 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
452 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
453 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
a374c57b | 454 | part_uv->heartbeat_gpa = msg->heartbeat_gpa; |
6f2584f4 JS |
455 | |
456 | if (msg->activate_gru_mq_desc_gpa != | |
457 | part_uv->activate_gru_mq_desc_gpa) { | |
8875408a | 458 | spin_lock(&part_uv->flags_lock); |
6f2584f4 | 459 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; |
8875408a | 460 | spin_unlock(&part_uv->flags_lock); |
6f2584f4 JS |
461 | part_uv->activate_gru_mq_desc_gpa = |
462 | msg->activate_gru_mq_desc_gpa; | |
463 | } | |
bd3e64c1 | 464 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
5b8669df | 465 | |
bd3e64c1 DN |
466 | (*wakeup_hb_checker)++; |
467 | break; | |
468 | } | |
469 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
470 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 471 | |
bd3e64c1 DN |
472 | msg = container_of(msg_hdr, struct |
473 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 474 | |
bd3e64c1 DN |
475 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
476 | if (part_uv->act_state_req == 0) | |
477 | xpc_activate_IRQ_rcvd++; | |
478 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
479 | part_uv->reason = msg->reason; | |
480 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
481 | ||
482 | (*wakeup_hb_checker)++; | |
483 | return; | |
484 | } | |
485 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
486 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 487 | |
09358972 RH |
488 | if (!part_setup) |
489 | break; | |
490 | ||
bd3e64c1 DN |
491 | msg = container_of(msg_hdr, struct |
492 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
493 | hdr); | |
494 | args = &part->remote_openclose_args[msg->ch_number]; | |
495 | args->reason = msg->reason; | |
5b8669df | 496 | |
bd3e64c1 DN |
497 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
498 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
499 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 500 | |
bd3e64c1 DN |
501 | xpc_wakeup_channel_mgr(part); |
502 | break; | |
503 | } | |
504 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
505 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 506 | |
09358972 RH |
507 | if (!part_setup) |
508 | break; | |
509 | ||
bd3e64c1 DN |
510 | msg = container_of(msg_hdr, struct |
511 | xpc_activate_mq_msg_chctl_closereply_uv, | |
512 | hdr); | |
5b8669df | 513 | |
bd3e64c1 DN |
514 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
515 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
516 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 517 | |
bd3e64c1 DN |
518 | xpc_wakeup_channel_mgr(part); |
519 | break; | |
520 | } | |
521 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { | |
522 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
523 | ||
09358972 RH |
524 | if (!part_setup) |
525 | break; | |
526 | ||
bd3e64c1 DN |
527 | msg = container_of(msg_hdr, struct |
528 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
529 | hdr); | |
530 | args = &part->remote_openclose_args[msg->ch_number]; | |
531 | args->entry_size = msg->entry_size; | |
532 | args->local_nentries = msg->local_nentries; | |
533 | ||
534 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
535 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
536 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
537 | ||
538 | xpc_wakeup_channel_mgr(part); | |
539 | break; | |
540 | } | |
541 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
542 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
543 | ||
09358972 RH |
544 | if (!part_setup) |
545 | break; | |
546 | ||
bd3e64c1 DN |
547 | msg = container_of(msg_hdr, struct |
548 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
549 | args = &part->remote_openclose_args[msg->ch_number]; | |
550 | args->remote_nentries = msg->remote_nentries; | |
551 | args->local_nentries = msg->local_nentries; | |
6f2584f4 | 552 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
bd3e64c1 DN |
553 | |
554 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
555 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
556 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
557 | ||
558 | xpc_wakeup_channel_mgr(part); | |
559 | break; | |
560 | } | |
efdd06ed RH |
561 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { |
562 | struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; | |
563 | ||
09358972 RH |
564 | if (!part_setup) |
565 | break; | |
566 | ||
efdd06ed RH |
567 | msg = container_of(msg_hdr, struct |
568 | xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); | |
569 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
570 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; | |
571 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
572 | ||
573 | xpc_wakeup_channel_mgr(part); | |
574 | } | |
bd3e64c1 DN |
575 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: |
576 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
577 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
578 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
579 | break; | |
580 | ||
581 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
582 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
583 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
584 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
585 | break; | |
586 | ||
587 | default: | |
588 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
589 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
590 | ||
591 | /* get hb checker to deactivate from the remote partition */ | |
592 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
593 | if (part_uv->act_state_req == 0) | |
594 | xpc_activate_IRQ_rcvd++; | |
595 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
596 | part_uv->reason = xpBadMsgType; | |
597 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 598 | |
bd3e64c1 DN |
599 | (*wakeup_hb_checker)++; |
600 | return; | |
601 | } | |
5b8669df | 602 | |
bd3e64c1 DN |
603 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
604 | part->remote_rp_ts_jiffies != 0) { | |
605 | /* | |
606 | * ??? Does what we do here need to be sensitive to | |
607 | * ??? act_state or remote_act_state? | |
608 | */ | |
609 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
610 | if (part_uv->act_state_req == 0) | |
611 | xpc_activate_IRQ_rcvd++; | |
612 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
613 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 614 | |
bd3e64c1 DN |
615 | (*wakeup_hb_checker)++; |
616 | } | |
617 | } | |
618 | ||
619 | static irqreturn_t | |
620 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
621 | { | |
622 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
623 | short partid; | |
624 | struct xpc_partition *part; | |
625 | int wakeup_hb_checker = 0; | |
6f2584f4 | 626 | int part_referenced; |
bd3e64c1 | 627 | |
2525789b | 628 | while (1) { |
6f2584f4 | 629 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
2525789b DN |
630 | if (msg_hdr == NULL) |
631 | break; | |
bd3e64c1 DN |
632 | |
633 | partid = msg_hdr->partid; | |
634 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
635 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
636 | "received invalid partid=0x%x in message\n", | |
637 | partid); | |
638 | } else { | |
639 | part = &xpc_partitions[partid]; | |
6f2584f4 JS |
640 | |
641 | part_referenced = xpc_part_ref(part); | |
642 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
09358972 | 643 | part_referenced, |
6f2584f4 JS |
644 | &wakeup_hb_checker); |
645 | if (part_referenced) | |
bd3e64c1 | 646 | xpc_part_deref(part); |
5b8669df DN |
647 | } |
648 | ||
6f2584f4 | 649 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
5b8669df DN |
650 | } |
651 | ||
652 | if (wakeup_hb_checker) | |
653 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
654 | ||
655 | return IRQ_HANDLED; | |
656 | } | |
657 | ||
6f2584f4 JS |
658 | static enum xp_retval |
659 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, | |
660 | unsigned long gru_mq_desc_gpa) | |
661 | { | |
662 | enum xp_retval ret; | |
663 | ||
664 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, | |
665 | sizeof(struct gru_message_queue_desc)); | |
666 | if (ret == xpSuccess) | |
667 | gru_mq_desc->mq = NULL; | |
668 | ||
669 | return ret; | |
670 | } | |
671 | ||
5b8669df DN |
672 | static enum xp_retval |
673 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
674 | int msg_type) | |
675 | { | |
676 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
6f2584f4 JS |
677 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
678 | struct gru_message_queue_desc *gru_mq_desc; | |
679 | unsigned long irq_flags; | |
680 | enum xp_retval ret; | |
5b8669df DN |
681 | |
682 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
683 | ||
684 | msg_hdr->type = msg_type; | |
6f2584f4 | 685 | msg_hdr->partid = xp_partition_id; |
5b8669df DN |
686 | msg_hdr->act_state = part->act_state; |
687 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
688 | ||
6f2584f4 JS |
689 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
690 | again: | |
691 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { | |
692 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; | |
693 | if (gru_mq_desc == NULL) { | |
694 | gru_mq_desc = kmalloc(sizeof(struct | |
695 | gru_message_queue_desc), | |
696 | GFP_KERNEL); | |
697 | if (gru_mq_desc == NULL) { | |
698 | ret = xpNoMemory; | |
699 | goto done; | |
700 | } | |
701 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; | |
702 | } | |
703 | ||
704 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, | |
705 | part_uv-> | |
706 | activate_gru_mq_desc_gpa); | |
707 | if (ret != xpSuccess) | |
708 | goto done; | |
709 | ||
710 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
711 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
712 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
713 | } | |
714 | ||
5b8669df | 715 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
6f2584f4 JS |
716 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
717 | msg_size); | |
718 | if (ret != xpSuccess) { | |
719 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ | |
720 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) | |
721 | goto again; | |
722 | } | |
723 | done: | |
724 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
725 | return ret; | |
5b8669df DN |
726 | } |
727 | ||
728 | static void | |
729 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
730 | size_t msg_size, int msg_type) | |
731 | { | |
732 | enum xp_retval ret; | |
733 | ||
734 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
735 | if (unlikely(ret != xpSuccess)) | |
736 | XPC_DEACTIVATE_PARTITION(part, ret); | |
737 | } | |
738 | ||
739 | static void | |
740 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
741 | void *msg, size_t msg_size, int msg_type) | |
742 | { | |
6f2584f4 | 743 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
5b8669df DN |
744 | enum xp_retval ret; |
745 | ||
746 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
747 | if (unlikely(ret != xpSuccess)) { | |
748 | if (irq_flags != NULL) | |
749 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
750 | ||
751 | XPC_DEACTIVATE_PARTITION(part, ret); | |
752 | ||
753 | if (irq_flags != NULL) | |
754 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
755 | } | |
756 | } | |
757 | ||
758 | static void | |
759 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
760 | { | |
761 | unsigned long irq_flags; | |
762 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
763 | ||
33ba3c77 | 764 | /* |
7d9d1f25 | 765 | * !!! Make our side think that the remote partition sent an activate |
a374c57b | 766 | * !!! mq message our way by doing what the activate IRQ handler would |
ea57f80c | 767 | * !!! do had one really been sent. |
33ba3c77 | 768 | */ |
5b8669df DN |
769 | |
770 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
771 | if (part_uv->act_state_req == 0) | |
772 | xpc_activate_IRQ_rcvd++; | |
773 | part_uv->act_state_req = act_state_req; | |
774 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
775 | ||
776 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
777 | } |
778 | ||
94bd2708 | 779 | static enum xp_retval |
5b8669df DN |
780 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
781 | size_t *len) | |
94bd2708 | 782 | { |
7d9d1f25 DN |
783 | s64 status; |
784 | enum xp_retval ret; | |
785 | ||
786 | #if defined CONFIG_X86_64 | |
787 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
788 | (u64 *)len); | |
789 | if (status == BIOS_STATUS_SUCCESS) | |
790 | ret = xpSuccess; | |
791 | else if (status == BIOS_STATUS_MORE_PASSES) | |
792 | ret = xpNeedMoreInfo; | |
793 | else | |
794 | ret = xpBiosError; | |
795 | ||
796 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
797 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
798 | if (status == SALRET_OK) | |
799 | ret = xpSuccess; | |
800 | else if (status == SALRET_MORE_PASSES) | |
801 | ret = xpNeedMoreInfo; | |
802 | else | |
803 | ret = xpSalError; | |
804 | ||
805 | #else | |
806 | #error not a supported configuration | |
807 | #endif | |
808 | ||
809 | return ret; | |
5b8669df DN |
810 | } |
811 | ||
812 | static int | |
a7665b0a | 813 | xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) |
5b8669df | 814 | { |
a374c57b RH |
815 | xpc_heartbeat_uv = |
816 | &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; | |
817 | rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); | |
818 | rp->sn.uv.activate_gru_mq_desc_gpa = | |
6f2584f4 | 819 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); |
5b8669df DN |
820 | return 0; |
821 | } | |
822 | ||
823 | static void | |
a374c57b | 824 | xpc_allow_hb_uv(short partid) |
5b8669df | 825 | { |
a374c57b | 826 | } |
5b8669df | 827 | |
a374c57b RH |
828 | static void |
829 | xpc_disallow_hb_uv(short partid) | |
830 | { | |
831 | } | |
5b8669df | 832 | |
a374c57b RH |
833 | static void |
834 | xpc_disallow_all_hbs_uv(void) | |
835 | { | |
94bd2708 DN |
836 | } |
837 | ||
33ba3c77 DN |
838 | static void |
839 | xpc_increment_heartbeat_uv(void) | |
840 | { | |
a374c57b | 841 | xpc_heartbeat_uv->value++; |
5b8669df DN |
842 | } |
843 | ||
844 | static void | |
845 | xpc_offline_heartbeat_uv(void) | |
846 | { | |
a374c57b RH |
847 | xpc_increment_heartbeat_uv(); |
848 | xpc_heartbeat_uv->offline = 1; | |
5b8669df DN |
849 | } |
850 | ||
851 | static void | |
852 | xpc_online_heartbeat_uv(void) | |
853 | { | |
a374c57b RH |
854 | xpc_increment_heartbeat_uv(); |
855 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
856 | } |
857 | ||
858 | static void | |
859 | xpc_heartbeat_init_uv(void) | |
860 | { | |
a374c57b RH |
861 | xpc_heartbeat_uv->value = 1; |
862 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
863 | } |
864 | ||
865 | static void | |
866 | xpc_heartbeat_exit_uv(void) | |
867 | { | |
a374c57b | 868 | xpc_offline_heartbeat_uv(); |
5b8669df DN |
869 | } |
870 | ||
871 | static enum xp_retval | |
872 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
873 | { | |
874 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
a374c57b | 875 | enum xp_retval ret; |
5b8669df | 876 | |
a374c57b RH |
877 | ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), |
878 | part_uv->heartbeat_gpa, | |
879 | sizeof(struct xpc_heartbeat_uv)); | |
880 | if (ret != xpSuccess) | |
881 | return ret; | |
5b8669df | 882 | |
a374c57b RH |
883 | if (part_uv->cached_heartbeat.value == part->last_heartbeat && |
884 | !part_uv->cached_heartbeat.offline) { | |
5b8669df | 885 | |
a374c57b RH |
886 | ret = xpNoHeartbeat; |
887 | } else { | |
888 | part->last_heartbeat = part_uv->cached_heartbeat.value; | |
5b8669df DN |
889 | } |
890 | return ret; | |
33ba3c77 DN |
891 | } |
892 | ||
893 | static void | |
a47d5dac | 894 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 895 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
896 | { |
897 | short partid = remote_rp->SAL_partid; | |
898 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 899 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 900 | |
5b8669df DN |
901 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
902 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
a374c57b | 903 | part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; |
6f2584f4 | 904 | part->sn.uv.activate_gru_mq_desc_gpa = |
a374c57b | 905 | remote_rp->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
906 | |
907 | /* | |
908 | * ??? Is it a good idea to make this conditional on what is | |
909 | * ??? potentially stale state information? | |
910 | */ | |
911 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
912 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
a374c57b | 913 | msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; |
6f2584f4 | 914 | msg.activate_gru_mq_desc_gpa = |
a374c57b | 915 | xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
916 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
917 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
918 | } | |
33ba3c77 | 919 | |
5b8669df DN |
920 | if (part->act_state == XPC_P_AS_INACTIVE) |
921 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
922 | } |
923 | ||
a47d5dac DN |
924 | static void |
925 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
926 | { | |
5b8669df DN |
927 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
928 | } | |
929 | ||
930 | static void | |
931 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
932 | { | |
933 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
934 | ||
935 | /* | |
936 | * ??? Is it a good idea to make this conditional on what is | |
937 | * ??? potentially stale state information? | |
938 | */ | |
939 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
940 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
941 | ||
942 | msg.reason = part->reason; | |
943 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
944 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
945 | } | |
a47d5dac DN |
946 | } |
947 | ||
bd3e64c1 DN |
948 | static void |
949 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
950 | { | |
951 | /* nothing needs to be done */ | |
952 | return; | |
953 | } | |
954 | ||
955 | static void | |
956 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
957 | { | |
958 | head->first = NULL; | |
959 | head->last = NULL; | |
960 | spin_lock_init(&head->lock); | |
961 | head->n_entries = 0; | |
962 | } | |
963 | ||
964 | static void * | |
965 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
966 | { | |
967 | unsigned long irq_flags; | |
968 | struct xpc_fifo_entry_uv *first; | |
969 | ||
970 | spin_lock_irqsave(&head->lock, irq_flags); | |
971 | first = head->first; | |
972 | if (head->first != NULL) { | |
973 | head->first = first->next; | |
974 | if (head->first == NULL) | |
975 | head->last = NULL; | |
15b87d67 RH |
976 | |
977 | head->n_entries--; | |
978 | BUG_ON(head->n_entries < 0); | |
979 | ||
980 | first->next = NULL; | |
bd3e64c1 | 981 | } |
bd3e64c1 | 982 | spin_unlock_irqrestore(&head->lock, irq_flags); |
bd3e64c1 DN |
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 | |
a7665b0a | 1013 | xpc_setup_ch_structures_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 | |
a7665b0a | 1032 | xpc_teardown_ch_structures_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 | ||
dbd2918e RH |
1051 | while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) || |
1052 | (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) { | |
5b8669df DN |
1053 | |
1054 | dev_dbg(xpc_part, "waiting to make first contact with " | |
1055 | "partition %d\n", XPC_PARTID(part)); | |
1056 | ||
1057 | /* wait a 1/4 of a second or so */ | |
1058 | (void)msleep_interruptible(250); | |
1059 | ||
1060 | if (part->act_state == XPC_P_AS_DEACTIVATING) | |
1061 | return part->reason; | |
1062 | } | |
1063 | ||
1064 | return xpSuccess; | |
e17d416b DN |
1065 | } |
1066 | ||
1067 | static u64 | |
7fb5e59d | 1068 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
e17d416b | 1069 | { |
5b8669df DN |
1070 | unsigned long irq_flags; |
1071 | union xpc_channel_ctl_flags chctl; | |
1072 | ||
1073 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1074 | chctl = part->chctl; | |
1075 | if (chctl.all_flags != 0) | |
1076 | part->chctl.all_flags = 0; | |
1077 | ||
1078 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1079 | return chctl.all_flags; | |
1080 | } | |
1081 | ||
bd3e64c1 DN |
1082 | static enum xp_retval |
1083 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) | |
1084 | { | |
1085 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1086 | struct xpc_send_msg_slot_uv *msg_slot; | |
1087 | unsigned long irq_flags; | |
1088 | int nentries; | |
1089 | int entry; | |
1090 | size_t nbytes; | |
1091 | ||
1092 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { | |
1093 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); | |
1094 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1095 | if (ch_uv->send_msg_slots == NULL) | |
1096 | continue; | |
1097 | ||
1098 | for (entry = 0; entry < nentries; entry++) { | |
1099 | msg_slot = &ch_uv->send_msg_slots[entry]; | |
1100 | ||
1101 | msg_slot->msg_slot_number = entry; | |
1102 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, | |
1103 | &msg_slot->next); | |
1104 | } | |
1105 | ||
1106 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1107 | if (nentries < ch->local_nentries) | |
1108 | ch->local_nentries = nentries; | |
1109 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1110 | return xpSuccess; | |
1111 | } | |
1112 | ||
1113 | return xpNoMemory; | |
1114 | } | |
1115 | ||
1116 | static enum xp_retval | |
1117 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) | |
1118 | { | |
1119 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1120 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1121 | unsigned long irq_flags; | |
1122 | int nentries; | |
1123 | int entry; | |
1124 | size_t nbytes; | |
1125 | ||
1126 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { | |
1127 | nbytes = nentries * ch->entry_size; | |
1128 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1129 | if (ch_uv->recv_msg_slots == NULL) | |
1130 | continue; | |
1131 | ||
1132 | for (entry = 0; entry < nentries; entry++) { | |
361916a9 DN |
1133 | msg_slot = ch_uv->recv_msg_slots + |
1134 | entry * ch->entry_size; | |
bd3e64c1 DN |
1135 | |
1136 | msg_slot->hdr.msg_slot_number = entry; | |
1137 | } | |
1138 | ||
1139 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1140 | if (nentries < ch->remote_nentries) | |
1141 | ch->remote_nentries = nentries; | |
1142 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1143 | return xpSuccess; | |
1144 | } | |
1145 | ||
1146 | return xpNoMemory; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Allocate msg_slots associated with the channel. | |
1151 | */ | |
5b8669df DN |
1152 | static enum xp_retval |
1153 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) | |
1154 | { | |
bd3e64c1 DN |
1155 | static enum xp_retval ret; |
1156 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1157 | ||
1158 | DBUG_ON(ch->flags & XPC_C_SETUP); | |
1159 | ||
6f2584f4 JS |
1160 | ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct |
1161 | gru_message_queue_desc), | |
1162 | GFP_KERNEL); | |
1163 | if (ch_uv->cached_notify_gru_mq_desc == NULL) | |
1164 | return xpNoMemory; | |
1165 | ||
bd3e64c1 DN |
1166 | ret = xpc_allocate_send_msg_slot_uv(ch); |
1167 | if (ret == xpSuccess) { | |
1168 | ||
1169 | ret = xpc_allocate_recv_msg_slot_uv(ch); | |
1170 | if (ret != xpSuccess) { | |
1171 | kfree(ch_uv->send_msg_slots); | |
1172 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1173 | } | |
1174 | } | |
1175 | return ret; | |
5b8669df DN |
1176 | } |
1177 | ||
bd3e64c1 DN |
1178 | /* |
1179 | * Free up msg_slots and clear other stuff that were setup for the specified | |
1180 | * channel. | |
1181 | */ | |
5b8669df DN |
1182 | static void |
1183 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) | |
1184 | { | |
1185 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1186 | ||
f2199625 | 1187 | lockdep_assert_held(&ch->lock); |
bd3e64c1 | 1188 | |
6f2584f4 JS |
1189 | kfree(ch_uv->cached_notify_gru_mq_desc); |
1190 | ch_uv->cached_notify_gru_mq_desc = NULL; | |
5b8669df | 1191 | |
bd3e64c1 DN |
1192 | if (ch->flags & XPC_C_SETUP) { |
1193 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1194 | kfree(ch_uv->send_msg_slots); | |
1195 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1196 | kfree(ch_uv->recv_msg_slots); | |
1197 | } | |
5b8669df DN |
1198 | } |
1199 | ||
1200 | static void | |
1201 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1202 | { | |
1203 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; | |
1204 | ||
1205 | msg.ch_number = ch->number; | |
1206 | msg.reason = ch->reason; | |
1207 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1208 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); | |
1209 | } | |
1210 | ||
1211 | static void | |
1212 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1213 | { | |
1214 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; | |
1215 | ||
1216 | msg.ch_number = ch->number; | |
1217 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1218 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); | |
1219 | } | |
1220 | ||
1221 | static void | |
1222 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1223 | { | |
1224 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; | |
1225 | ||
1226 | msg.ch_number = ch->number; | |
bd3e64c1 | 1227 | msg.entry_size = ch->entry_size; |
5b8669df DN |
1228 | msg.local_nentries = ch->local_nentries; |
1229 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1230 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); | |
1231 | } | |
1232 | ||
1233 | static void | |
1234 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1235 | { | |
1236 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; | |
1237 | ||
1238 | msg.ch_number = ch->number; | |
1239 | msg.local_nentries = ch->local_nentries; | |
1240 | msg.remote_nentries = ch->remote_nentries; | |
6f2584f4 | 1241 | msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); |
5b8669df DN |
1242 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
1243 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); | |
1244 | } | |
1245 | ||
efdd06ed RH |
1246 | static void |
1247 | xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1248 | { | |
1249 | struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; | |
1250 | ||
1251 | msg.ch_number = ch->number; | |
1252 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1253 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); | |
1254 | } | |
1255 | ||
bd3e64c1 DN |
1256 | static void |
1257 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1258 | { | |
1259 | unsigned long irq_flags; | |
1260 | ||
1261 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1262 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1263 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1264 | ||
1265 | xpc_wakeup_channel_mgr(part); | |
1266 | } | |
1267 | ||
6f2584f4 | 1268 | static enum xp_retval |
5b8669df | 1269 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
6f2584f4 | 1270 | unsigned long gru_mq_desc_gpa) |
5b8669df | 1271 | { |
6f2584f4 JS |
1272 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
1273 | ||
1274 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); | |
1275 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, | |
1276 | gru_mq_desc_gpa); | |
5b8669df DN |
1277 | } |
1278 | ||
1279 | static void | |
1280 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1281 | { | |
1282 | struct xpc_activate_mq_msg_uv msg; | |
1283 | ||
1284 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1285 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1286 | } | |
1287 | ||
1288 | static void | |
1289 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1290 | { | |
1291 | struct xpc_activate_mq_msg_uv msg; | |
1292 | ||
1293 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1294 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1295 | } | |
1296 | ||
1297 | static void | |
1298 | xpc_assume_partition_disengaged_uv(short partid) | |
1299 | { | |
1300 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1301 | unsigned long irq_flags; | |
1302 | ||
1303 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1304 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1305 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1306 | } | |
1307 | ||
1308 | static int | |
1309 | xpc_partition_engaged_uv(short partid) | |
1310 | { | |
1311 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1312 | } | |
1313 | ||
1314 | static int | |
1315 | xpc_any_partition_engaged_uv(void) | |
1316 | { | |
1317 | struct xpc_partition_uv *part_uv; | |
1318 | short partid; | |
1319 | ||
1320 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1321 | part_uv = &xpc_partitions[partid].sn.uv; | |
1322 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1323 | return 1; | |
1324 | } | |
1325 | return 0; | |
e17d416b DN |
1326 | } |
1327 | ||
bd3e64c1 DN |
1328 | static enum xp_retval |
1329 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1330 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1331 | { | |
1332 | enum xp_retval ret; | |
1333 | struct xpc_send_msg_slot_uv *msg_slot; | |
1334 | struct xpc_fifo_entry_uv *entry; | |
1335 | ||
1336 | while (1) { | |
1337 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1338 | if (entry != NULL) | |
1339 | break; | |
1340 | ||
1341 | if (flags & XPC_NOWAIT) | |
1342 | return xpNoWait; | |
1343 | ||
1344 | ret = xpc_allocate_msg_wait(ch); | |
1345 | if (ret != xpInterrupted && ret != xpTimeout) | |
1346 | return ret; | |
1347 | } | |
1348 | ||
1349 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1350 | *address_of_msg_slot = msg_slot; | |
1351 | return xpSuccess; | |
1352 | } | |
1353 | ||
1354 | static void | |
1355 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1356 | struct xpc_send_msg_slot_uv *msg_slot) | |
1357 | { | |
1358 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1359 | ||
1360 | /* wakeup anyone waiting for a free msg slot */ | |
1361 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1362 | wake_up(&ch->msg_allocate_wq); | |
1363 | } | |
1364 | ||
1365 | static void | |
1366 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1367 | struct xpc_send_msg_slot_uv *msg_slot, | |
1368 | enum xp_retval reason) | |
1369 | { | |
1370 | xpc_notify_func func = msg_slot->func; | |
1371 | ||
1372 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1373 | ||
1374 | atomic_dec(&ch->n_to_notify); | |
1375 | ||
1376 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1377 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1378 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1379 | ||
1380 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1381 | ||
1382 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1383 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1384 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | static void | |
1389 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1390 | struct xpc_notify_mq_msg_uv *msg) | |
1391 | { | |
1392 | struct xpc_send_msg_slot_uv *msg_slot; | |
1393 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1394 | ||
1395 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1396 | ||
1397 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1398 | msg_slot->msg_slot_number += ch->local_nentries; | |
1399 | ||
1400 | if (msg_slot->func != NULL) | |
1401 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1402 | ||
1403 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1404 | } | |
1405 | ||
1406 | static void | |
1407 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1408 | struct xpc_notify_mq_msg_uv *msg) | |
1409 | { | |
1410 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1411 | struct xpc_channel *ch; | |
1412 | struct xpc_channel_uv *ch_uv; | |
1413 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1414 | unsigned long irq_flags; | |
1415 | int ch_number = msg->hdr.ch_number; | |
1416 | ||
1417 | if (unlikely(ch_number >= part->nchannels)) { | |
1418 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1419 | "channel number=0x%x in message from partid=%d\n", | |
1420 | ch_number, XPC_PARTID(part)); | |
1421 | ||
1422 | /* get hb checker to deactivate from the remote partition */ | |
1423 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1424 | if (part_uv->act_state_req == 0) | |
1425 | xpc_activate_IRQ_rcvd++; | |
1426 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1427 | part_uv->reason = xpBadChannelNumber; | |
1428 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1429 | ||
1430 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1431 | return; | |
1432 | } | |
1433 | ||
1434 | ch = &part->channels[ch_number]; | |
1435 | xpc_msgqueue_ref(ch); | |
1436 | ||
1437 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1438 | xpc_msgqueue_deref(ch); | |
1439 | return; | |
1440 | } | |
1441 | ||
1442 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1443 | if (msg->hdr.size == 0) { | |
1444 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1445 | xpc_msgqueue_deref(ch); | |
1446 | return; | |
1447 | } | |
1448 | ||
1449 | /* we're dealing with a normal message sent via the notify_mq */ | |
1450 | ch_uv = &ch->sn.uv; | |
1451 | ||
361916a9 DN |
1452 | msg_slot = ch_uv->recv_msg_slots + |
1453 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; | |
bd3e64c1 | 1454 | |
bd3e64c1 DN |
1455 | BUG_ON(msg_slot->hdr.size != 0); |
1456 | ||
1457 | memcpy(msg_slot, msg, msg->hdr.size); | |
1458 | ||
1459 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1460 | ||
1461 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1462 | /* | |
1463 | * If there is an existing idle kthread get it to deliver | |
1464 | * the payload, otherwise we'll have to get the channel mgr | |
1465 | * for this partition to create a kthread to do the delivery. | |
1466 | */ | |
1467 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1468 | wake_up_nr(&ch->idle_wq, 1); | |
1469 | else | |
1470 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1471 | } | |
1472 | xpc_msgqueue_deref(ch); | |
1473 | } | |
1474 | ||
1475 | static irqreturn_t | |
1476 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1477 | { | |
1478 | struct xpc_notify_mq_msg_uv *msg; | |
1479 | short partid; | |
1480 | struct xpc_partition *part; | |
1481 | ||
6f2584f4 JS |
1482 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
1483 | NULL) { | |
bd3e64c1 DN |
1484 | |
1485 | partid = msg->hdr.partid; | |
1486 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1487 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1488 | "invalid partid=0x%x in message\n", partid); | |
1489 | } else { | |
1490 | part = &xpc_partitions[partid]; | |
1491 | ||
1492 | if (xpc_part_ref(part)) { | |
1493 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1494 | xpc_part_deref(part); | |
1495 | } | |
1496 | } | |
1497 | ||
6f2584f4 | 1498 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
bd3e64c1 DN |
1499 | } |
1500 | ||
1501 | return IRQ_HANDLED; | |
1502 | } | |
1503 | ||
1504 | static int | |
1505 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1506 | { | |
1507 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1508 | } | |
1509 | ||
1510 | static void | |
1511 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1512 | { | |
1513 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1514 | int ndeliverable_payloads; | |
1515 | ||
1516 | xpc_msgqueue_ref(ch); | |
1517 | ||
1518 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1519 | ||
1520 | if (ndeliverable_payloads > 0 && | |
1521 | (ch->flags & XPC_C_CONNECTED) && | |
1522 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1523 | ||
1524 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1525 | } | |
1526 | ||
1527 | xpc_msgqueue_deref(ch); | |
1528 | } | |
1529 | ||
1530 | static enum xp_retval | |
1531 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1532 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1533 | void *key) | |
1534 | { | |
1535 | enum xp_retval ret = xpSuccess; | |
1536 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1537 | struct xpc_notify_mq_msg_uv *msg; | |
1538 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1539 | size_t msg_size; | |
1540 | ||
1541 | DBUG_ON(notify_type != XPC_N_CALL); | |
1542 | ||
1543 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1544 | if (msg_size > ch->entry_size) | |
1545 | return xpPayloadTooBig; | |
1546 | ||
1547 | xpc_msgqueue_ref(ch); | |
1548 | ||
1549 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1550 | ret = ch->reason; | |
1551 | goto out_1; | |
1552 | } | |
1553 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1554 | ret = xpNotConnected; | |
1555 | goto out_1; | |
1556 | } | |
1557 | ||
1558 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1559 | if (ret != xpSuccess) | |
1560 | goto out_1; | |
1561 | ||
1562 | if (func != NULL) { | |
1563 | atomic_inc(&ch->n_to_notify); | |
1564 | ||
1565 | msg_slot->key = key; | |
69b3bb65 | 1566 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
bd3e64c1 DN |
1567 | msg_slot->func = func; |
1568 | ||
1569 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1570 | ret = ch->reason; | |
1571 | goto out_2; | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1576 | msg->hdr.partid = xp_partition_id; | |
1577 | msg->hdr.ch_number = ch->number; | |
1578 | msg->hdr.size = msg_size; | |
1579 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1580 | memcpy(&msg->payload, payload, payload_size); | |
1581 | ||
6f2584f4 JS |
1582 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
1583 | msg_size); | |
bd3e64c1 DN |
1584 | if (ret == xpSuccess) |
1585 | goto out_1; | |
1586 | ||
1587 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1588 | out_2: | |
1589 | if (func != NULL) { | |
1590 | /* | |
1591 | * Try to NULL the msg_slot's func field. If we fail, then | |
1592 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1593 | * case we need to pretend we succeeded to send the message | |
1594 | * since the user will get a callout for the disconnect error | |
1595 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1596 | * error returned here will confuse them. Additionally, since | |
1597 | * in this case the channel is being disconnected we don't need | |
1598 | * to put the the msg_slot back on the free list. | |
1599 | */ | |
1600 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1601 | ret = xpSuccess; | |
1602 | goto out_1; | |
1603 | } | |
1604 | ||
1605 | msg_slot->key = NULL; | |
1606 | atomic_dec(&ch->n_to_notify); | |
1607 | } | |
1608 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1609 | out_1: | |
1610 | xpc_msgqueue_deref(ch); | |
1611 | return ret; | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1616 | * is unknown because the channel is now disconnecting. | |
1617 | * | |
1618 | * We don't worry about putting these msg_slots on the free list since the | |
1619 | * msg_slots themselves are about to be kfree'd. | |
1620 | */ | |
1621 | static void | |
1622 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1623 | { | |
1624 | struct xpc_send_msg_slot_uv *msg_slot; | |
1625 | int entry; | |
1626 | ||
1627 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1628 | ||
1629 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1630 | ||
1631 | if (atomic_read(&ch->n_to_notify) == 0) | |
1632 | break; | |
1633 | ||
1634 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1635 | if (msg_slot->func != NULL) | |
1636 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Get the next deliverable message's payload. | |
1642 | */ | |
1643 | static void * | |
1644 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1645 | { | |
1646 | struct xpc_fifo_entry_uv *entry; | |
1647 | struct xpc_notify_mq_msg_uv *msg; | |
1648 | void *payload = NULL; | |
1649 | ||
1650 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1651 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1652 | if (entry != NULL) { | |
1653 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1654 | hdr.u.next); | |
1655 | payload = &msg->payload; | |
1656 | } | |
1657 | } | |
1658 | return payload; | |
1659 | } | |
1660 | ||
1661 | static void | |
1662 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1663 | { |
bd3e64c1 DN |
1664 | struct xpc_notify_mq_msg_uv *msg; |
1665 | enum xp_retval ret; | |
1666 | ||
1667 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1668 | ||
1669 | /* return an ACK to the sender of this message */ | |
1670 | ||
1671 | msg->hdr.partid = xp_partition_id; | |
1672 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1673 | ||
6f2584f4 | 1674 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
bd3e64c1 DN |
1675 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
1676 | if (ret != xpSuccess) | |
1677 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
e17d416b DN |
1678 | } |
1679 | ||
a7665b0a RH |
1680 | static struct xpc_arch_operations xpc_arch_ops_uv = { |
1681 | .setup_partitions = xpc_setup_partitions_uv, | |
1682 | .teardown_partitions = xpc_teardown_partitions_uv, | |
1683 | .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, | |
1684 | .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, | |
1685 | .setup_rsvd_page = xpc_setup_rsvd_page_uv, | |
1686 | ||
1687 | .allow_hb = xpc_allow_hb_uv, | |
1688 | .disallow_hb = xpc_disallow_hb_uv, | |
1689 | .disallow_all_hbs = xpc_disallow_all_hbs_uv, | |
1690 | .increment_heartbeat = xpc_increment_heartbeat_uv, | |
1691 | .offline_heartbeat = xpc_offline_heartbeat_uv, | |
1692 | .online_heartbeat = xpc_online_heartbeat_uv, | |
1693 | .heartbeat_init = xpc_heartbeat_init_uv, | |
1694 | .heartbeat_exit = xpc_heartbeat_exit_uv, | |
1695 | .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, | |
1696 | ||
1697 | .request_partition_activation = | |
1698 | xpc_request_partition_activation_uv, | |
1699 | .request_partition_reactivation = | |
1700 | xpc_request_partition_reactivation_uv, | |
1701 | .request_partition_deactivation = | |
1702 | xpc_request_partition_deactivation_uv, | |
1703 | .cancel_partition_deactivation_request = | |
1704 | xpc_cancel_partition_deactivation_request_uv, | |
1705 | ||
1706 | .setup_ch_structures = xpc_setup_ch_structures_uv, | |
1707 | .teardown_ch_structures = xpc_teardown_ch_structures_uv, | |
1708 | ||
1709 | .make_first_contact = xpc_make_first_contact_uv, | |
1710 | ||
1711 | .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, | |
1712 | .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, | |
1713 | .send_chctl_closereply = xpc_send_chctl_closereply_uv, | |
1714 | .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, | |
1715 | .send_chctl_openreply = xpc_send_chctl_openreply_uv, | |
1716 | .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, | |
1717 | .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, | |
1718 | ||
1719 | .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, | |
1720 | ||
1721 | .setup_msg_structures = xpc_setup_msg_structures_uv, | |
1722 | .teardown_msg_structures = xpc_teardown_msg_structures_uv, | |
1723 | ||
1724 | .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, | |
1725 | .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, | |
1726 | .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, | |
1727 | .partition_engaged = xpc_partition_engaged_uv, | |
1728 | .any_partition_engaged = xpc_any_partition_engaged_uv, | |
1729 | ||
1730 | .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, | |
1731 | .send_payload = xpc_send_payload_uv, | |
1732 | .get_deliverable_payload = xpc_get_deliverable_payload_uv, | |
1733 | .received_payload = xpc_received_payload_uv, | |
1734 | .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, | |
1735 | }; | |
1736 | ||
7838f994 RH |
1737 | static int |
1738 | xpc_init_mq_node(int nid) | |
1739 | { | |
1740 | int cpu; | |
1741 | ||
1742 | get_online_cpus(); | |
1743 | ||
1744 | for_each_cpu(cpu, cpumask_of_node(nid)) { | |
1745 | xpc_activate_mq_uv = | |
1746 | xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, nid, | |
1747 | XPC_ACTIVATE_IRQ_NAME, | |
1748 | xpc_handle_activate_IRQ_uv); | |
1749 | if (!IS_ERR(xpc_activate_mq_uv)) | |
1750 | break; | |
1751 | } | |
1752 | if (IS_ERR(xpc_activate_mq_uv)) { | |
1753 | put_online_cpus(); | |
1754 | return PTR_ERR(xpc_activate_mq_uv); | |
1755 | } | |
1756 | ||
1757 | for_each_cpu(cpu, cpumask_of_node(nid)) { | |
1758 | xpc_notify_mq_uv = | |
1759 | xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, nid, | |
1760 | XPC_NOTIFY_IRQ_NAME, | |
1761 | xpc_handle_notify_IRQ_uv); | |
1762 | if (!IS_ERR(xpc_notify_mq_uv)) | |
1763 | break; | |
1764 | } | |
1765 | if (IS_ERR(xpc_notify_mq_uv)) { | |
1766 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1767 | put_online_cpus(); | |
1768 | return PTR_ERR(xpc_notify_mq_uv); | |
1769 | } | |
1770 | ||
1771 | put_online_cpus(); | |
1772 | return 0; | |
1773 | } | |
1774 | ||
5b8669df | 1775 | int |
94bd2708 DN |
1776 | xpc_init_uv(void) |
1777 | { | |
7838f994 RH |
1778 | int nid; |
1779 | int ret = 0; | |
1780 | ||
a7665b0a | 1781 | xpc_arch_ops = xpc_arch_ops_uv; |
bd3e64c1 DN |
1782 | |
1783 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1784 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1785 | XPC_MSG_HDR_MAX_SIZE); | |
1786 | return -E2BIG; | |
1787 | } | |
5b8669df | 1788 | |
7838f994 RH |
1789 | if (xpc_mq_node < 0) |
1790 | for_each_online_node(nid) { | |
1791 | ret = xpc_init_mq_node(nid); | |
5b8669df | 1792 | |
7838f994 RH |
1793 | if (!ret) |
1794 | break; | |
1795 | } | |
1796 | else | |
1797 | ret = xpc_init_mq_node(xpc_mq_node); | |
bd3e64c1 | 1798 | |
7838f994 RH |
1799 | if (ret < 0) |
1800 | dev_err(xpc_part, "xpc_init_mq_node() returned error=%d\n", | |
1801 | -ret); | |
1802 | ||
1803 | return ret; | |
94bd2708 DN |
1804 | } |
1805 | ||
1806 | void | |
1807 | xpc_exit_uv(void) | |
1808 | { | |
2525789b DN |
1809 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1810 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1811 | } |
7838f994 RH |
1812 | |
1813 | module_param(xpc_mq_node, int, 0); | |
1814 | MODULE_PARM_DESC(xpc_mq_node, "Node number on which to allocate message queues."); |