Commit | Line | Data |
---|---|---|
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> |
261f3b49 | 25 | #include <asm/uv/uv_hub.h> |
2525789b DN |
26 | #if defined CONFIG_X86_64 |
27 | #include <asm/uv/bios.h> | |
28 | #include <asm/uv/uv_irq.h> | |
29 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
30 | #include <asm/sn/intr.h> | |
31 | #include <asm/sn/sn_sal.h> | |
32 | #endif | |
5b8669df | 33 | #include "../sgi-gru/gru.h" |
261f3b49 | 34 | #include "../sgi-gru/grukservices.h" |
94bd2708 DN |
35 | #include "xpc.h" |
36 | ||
6f2584f4 JS |
37 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
38 | struct uv_IO_APIC_route_entry { | |
39 | __u64 vector : 8, | |
40 | delivery_mode : 3, | |
41 | dest_mode : 1, | |
42 | delivery_status : 1, | |
43 | polarity : 1, | |
44 | __reserved_1 : 1, | |
45 | trigger : 1, | |
46 | mask : 1, | |
47 | __reserved_2 : 15, | |
48 | dest : 32; | |
49 | }; | |
50 | #endif | |
51 | ||
a374c57b | 52 | static struct xpc_heartbeat_uv *xpc_heartbeat_uv; |
33ba3c77 | 53 | |
5b8669df | 54 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
55 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
56 | XPC_ACTIVATE_MSG_SIZE_UV) | |
57 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 58 | |
2525789b DN |
59 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
60 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
61 | XPC_NOTIFY_MSG_SIZE_UV) | |
62 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 63 | |
7838f994 RH |
64 | static int xpc_mq_node = -1; |
65 | ||
2525789b DN |
66 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
67 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
68 | |
69 | static int | |
a7665b0a | 70 | xpc_setup_partitions_uv(void) |
5b8669df DN |
71 | { |
72 | short partid; | |
73 | struct xpc_partition_uv *part_uv; | |
74 | ||
75 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
76 | part_uv = &xpc_partitions[partid].sn.uv; | |
77 | ||
6f2584f4 | 78 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
5b8669df DN |
79 | spin_lock_init(&part_uv->flags_lock); |
80 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
6f2584f4 | 85 | static void |
a7665b0a | 86 | xpc_teardown_partitions_uv(void) |
6f2584f4 JS |
87 | { |
88 | short partid; | |
89 | struct xpc_partition_uv *part_uv; | |
90 | unsigned long irq_flags; | |
91 | ||
92 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
93 | part_uv = &xpc_partitions[partid].sn.uv; | |
94 | ||
95 | if (part_uv->cached_activate_gru_mq_desc != NULL) { | |
96 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
97 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
98 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
99 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
100 | kfree(part_uv->cached_activate_gru_mq_desc); | |
101 | part_uv->cached_activate_gru_mq_desc = NULL; | |
102 | mutex_unlock(&part_uv-> | |
103 | cached_activate_gru_mq_desc_mutex); | |
104 | } | |
105 | } | |
106 | } | |
107 | ||
2525789b DN |
108 | static int |
109 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
110 | { | |
6f2584f4 JS |
111 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
112 | ||
2525789b | 113 | #if defined CONFIG_X86_64 |
6c2c5029 DS |
114 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset, |
115 | UV_AFFINITY_CPU); | |
7838f994 | 116 | if (mq->irq < 0) |
6f2584f4 | 117 | return mq->irq; |
2525789b | 118 | |
6f2584f4 | 119 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
2525789b | 120 | |
6f2584f4 | 121 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
2525789b DN |
122 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
123 | mq->irq = SGI_XPC_ACTIVATE; | |
124 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
125 | mq->irq = SGI_XPC_NOTIFY; | |
126 | else | |
127 | return -EINVAL; | |
128 | ||
6f2584f4 JS |
129 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
130 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); | |
2525789b DN |
131 | #else |
132 | #error not a supported configuration | |
133 | #endif | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static void | |
139 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
140 | { | |
141 | #if defined CONFIG_X86_64 | |
6c2c5029 | 142 | uv_teardown_irq(mq->irq); |
2525789b DN |
143 | |
144 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
145 | int mmr_pnode; | |
146 | unsigned long mmr_value; | |
147 | ||
148 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
149 | mmr_value = 1UL << 16; | |
150 | ||
151 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
152 | #else | |
153 | #error not a supported configuration | |
154 | #endif | |
155 | } | |
156 | ||
157 | static int | |
158 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
159 | { | |
160 | int ret; | |
161 | ||
c2c9f115 RH |
162 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
163 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
164 | ||
165 | ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address), | |
c8182f00 | 166 | mq->order, &mq->mmr_offset); |
2525789b DN |
167 | if (ret < 0) { |
168 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
169 | ret); | |
170 | return -EBUSY; | |
171 | } | |
c2c9f115 RH |
172 | #elif defined CONFIG_X86_64 |
173 | ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address), | |
174 | mq->order, &mq->mmr_offset); | |
175 | if (ret < 0) { | |
176 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
177 | "ret=%d\n", ret); | |
178 | return ret; | |
179 | } | |
2525789b DN |
180 | #else |
181 | #error not a supported configuration | |
182 | #endif | |
183 | ||
184 | mq->watchlist_num = ret; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static void | |
189 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
190 | { | |
191 | int ret; | |
c2c9f115 | 192 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
2525789b DN |
193 | |
194 | #if defined CONFIG_X86_64 | |
c2c9f115 | 195 | ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
2525789b DN |
196 | BUG_ON(ret != BIOS_STATUS_SUCCESS); |
197 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
c2c9f115 | 198 | ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
2525789b DN |
199 | BUG_ON(ret != SALRET_OK); |
200 | #else | |
201 | #error not a supported configuration | |
202 | #endif | |
203 | } | |
204 | ||
205 | static struct xpc_gru_mq_uv * | |
206 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
207 | irq_handler_t irq_handler) |
208 | { | |
2525789b | 209 | enum xp_retval xp_ret; |
5b8669df DN |
210 | int ret; |
211 | int nid; | |
57e6d258 | 212 | int nasid; |
2525789b | 213 | int pg_order; |
5b8669df | 214 | struct page *page; |
2525789b | 215 | struct xpc_gru_mq_uv *mq; |
6f2584f4 | 216 | struct uv_IO_APIC_route_entry *mmr_value; |
2525789b DN |
217 | |
218 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
219 | if (mq == NULL) { | |
220 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
221 | "a xpc_gru_mq_uv structure\n"); | |
222 | ret = -ENOMEM; | |
6f2584f4 JS |
223 | goto out_0; |
224 | } | |
225 | ||
226 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), | |
227 | GFP_KERNEL); | |
228 | if (mq->gru_mq_desc == NULL) { | |
229 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
230 | "a gru_message_queue_desc structure\n"); | |
231 | ret = -ENOMEM; | |
2525789b DN |
232 | goto out_1; |
233 | } | |
5b8669df | 234 | |
2525789b DN |
235 | pg_order = get_order(mq_size); |
236 | mq->order = pg_order + PAGE_SHIFT; | |
237 | mq_size = 1UL << mq->order; | |
238 | ||
239 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
240 | ||
241 | nid = cpu_to_node(cpu); | |
7838f994 | 242 | page = alloc_pages_exact_node(nid, |
e97ca8e5 | 243 | GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE, |
7838f994 | 244 | pg_order); |
bd3e64c1 DN |
245 | if (page == NULL) { |
246 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
247 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
248 | ret = -ENOMEM; |
249 | goto out_2; | |
bd3e64c1 | 250 | } |
2525789b | 251 | mq->address = page_address(page); |
5b8669df | 252 | |
2525789b DN |
253 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
254 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
255 | if (ret != 0) | |
256 | goto out_3; | |
5b8669df | 257 | |
2525789b DN |
258 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
259 | if (ret != 0) | |
260 | goto out_4; | |
261 | ||
262 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
263 | if (ret != 0) { |
264 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
6f2584f4 | 265 | mq->irq, -ret); |
2525789b | 266 | goto out_5; |
5b8669df DN |
267 | } |
268 | ||
57e6d258 RH |
269 | nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu)); |
270 | ||
6f2584f4 JS |
271 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
272 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, | |
57e6d258 | 273 | nasid, mmr_value->vector, mmr_value->dest); |
6f2584f4 JS |
274 | if (ret != 0) { |
275 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
276 | "error=%d\n", ret); | |
277 | ret = -EINVAL; | |
278 | goto out_6; | |
279 | } | |
280 | ||
2525789b DN |
281 | /* allow other partitions to access this GRU mq */ |
282 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
283 | if (xp_ret != xpSuccess) { | |
284 | ret = -EACCES; | |
285 | goto out_6; | |
286 | } | |
5b8669df DN |
287 | |
288 | return mq; | |
2525789b DN |
289 | |
290 | /* something went wrong */ | |
291 | out_6: | |
292 | free_irq(mq->irq, NULL); | |
293 | out_5: | |
294 | xpc_release_gru_mq_irq_uv(mq); | |
295 | out_4: | |
296 | xpc_gru_mq_watchlist_free_uv(mq); | |
297 | out_3: | |
298 | free_pages((unsigned long)mq->address, pg_order); | |
299 | out_2: | |
6f2584f4 | 300 | kfree(mq->gru_mq_desc); |
2525789b | 301 | out_1: |
6f2584f4 JS |
302 | kfree(mq); |
303 | out_0: | |
2525789b | 304 | return ERR_PTR(ret); |
5b8669df | 305 | } |
94bd2708 | 306 | |
33ba3c77 | 307 | static void |
2525789b | 308 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 309 | { |
2525789b DN |
310 | unsigned int mq_size; |
311 | int pg_order; | |
312 | int ret; | |
313 | ||
314 | /* disallow other partitions to access GRU mq */ | |
315 | mq_size = 1UL << mq->order; | |
316 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
317 | BUG_ON(ret != xpSuccess); | |
318 | ||
319 | /* unregister irq handler and release mq irq/vector mapping */ | |
320 | free_irq(mq->irq, NULL); | |
321 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 322 | |
2525789b DN |
323 | /* disable generation of irq when GRU mq op occurs to this mq */ |
324 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 325 | |
2525789b DN |
326 | pg_order = mq->order - PAGE_SHIFT; |
327 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 328 | |
2525789b | 329 | kfree(mq); |
5b8669df DN |
330 | } |
331 | ||
332 | static enum xp_retval | |
6f2584f4 JS |
333 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
334 | size_t msg_size) | |
33ba3c77 | 335 | { |
5b8669df DN |
336 | enum xp_retval xp_ret; |
337 | int ret; | |
338 | ||
339 | while (1) { | |
6f2584f4 | 340 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
5b8669df DN |
341 | if (ret == MQE_OK) { |
342 | xp_ret = xpSuccess; | |
343 | break; | |
344 | } | |
345 | ||
346 | if (ret == MQE_QUEUE_FULL) { | |
347 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
348 | "error=MQE_QUEUE_FULL\n"); | |
349 | /* !!! handle QLimit reached; delay & try again */ | |
350 | /* ??? Do we add a limit to the number of retries? */ | |
351 | (void)msleep_interruptible(10); | |
352 | } else if (ret == MQE_CONGESTION) { | |
353 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
354 | "error=MQE_CONGESTION\n"); | |
355 | /* !!! handle LB Overflow; simply try again */ | |
356 | /* ??? Do we add a limit to the number of retries? */ | |
357 | } else { | |
358 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
359 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
360 | "error=%d\n", ret); | |
361 | xp_ret = xpGruSendMqError; | |
362 | break; | |
363 | } | |
364 | } | |
365 | return xp_ret; | |
366 | } | |
367 | ||
368 | static void | |
369 | xpc_process_activate_IRQ_rcvd_uv(void) | |
370 | { | |
371 | unsigned long irq_flags; | |
372 | short partid; | |
373 | struct xpc_partition *part; | |
374 | u8 act_state_req; | |
375 | ||
376 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
377 | ||
378 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
379 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
380 | part = &xpc_partitions[partid]; | |
381 | ||
382 | if (part->sn.uv.act_state_req == 0) | |
383 | continue; | |
384 | ||
385 | xpc_activate_IRQ_rcvd--; | |
386 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
387 | ||
388 | act_state_req = part->sn.uv.act_state_req; | |
389 | part->sn.uv.act_state_req = 0; | |
390 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
391 | ||
392 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
393 | if (part->act_state == XPC_P_AS_INACTIVE) | |
394 | xpc_activate_partition(part); | |
395 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
396 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
397 | ||
398 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
399 | if (part->act_state == XPC_P_AS_INACTIVE) | |
400 | xpc_activate_partition(part); | |
401 | else | |
402 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
403 | ||
404 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
405 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
406 | ||
407 | } else { | |
408 | BUG(); | |
409 | } | |
410 | ||
411 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
412 | if (xpc_activate_IRQ_rcvd == 0) | |
413 | break; | |
414 | } | |
415 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
416 | ||
417 | } | |
418 | ||
bd3e64c1 DN |
419 | static void |
420 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
421 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
09358972 | 422 | int part_setup, |
bd3e64c1 | 423 | int *wakeup_hb_checker) |
5b8669df DN |
424 | { |
425 | unsigned long irq_flags; | |
bd3e64c1 | 426 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 427 | struct xpc_openclose_args *args; |
5b8669df | 428 | |
bd3e64c1 | 429 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 430 | |
bd3e64c1 DN |
431 | switch (msg_hdr->type) { |
432 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
433 | /* syncing of remote_act_state was just done above */ | |
434 | break; | |
5b8669df | 435 | |
bd3e64c1 DN |
436 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { |
437 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 438 | |
bd3e64c1 DN |
439 | /* |
440 | * ??? Do we deal here with ts_jiffies being different | |
441 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
442 | * ??? below? | |
443 | */ | |
444 | msg = container_of(msg_hdr, struct | |
445 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 446 | |
bd3e64c1 DN |
447 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
448 | if (part_uv->act_state_req == 0) | |
449 | xpc_activate_IRQ_rcvd++; | |
450 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
451 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
452 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
a374c57b | 453 | part_uv->heartbeat_gpa = msg->heartbeat_gpa; |
6f2584f4 JS |
454 | |
455 | if (msg->activate_gru_mq_desc_gpa != | |
456 | part_uv->activate_gru_mq_desc_gpa) { | |
8875408a | 457 | spin_lock(&part_uv->flags_lock); |
6f2584f4 | 458 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; |
8875408a | 459 | spin_unlock(&part_uv->flags_lock); |
6f2584f4 JS |
460 | part_uv->activate_gru_mq_desc_gpa = |
461 | msg->activate_gru_mq_desc_gpa; | |
462 | } | |
bd3e64c1 | 463 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
5b8669df | 464 | |
bd3e64c1 DN |
465 | (*wakeup_hb_checker)++; |
466 | break; | |
467 | } | |
468 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
469 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 470 | |
bd3e64c1 DN |
471 | msg = container_of(msg_hdr, struct |
472 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 473 | |
bd3e64c1 DN |
474 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
475 | if (part_uv->act_state_req == 0) | |
476 | xpc_activate_IRQ_rcvd++; | |
477 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
478 | part_uv->reason = msg->reason; | |
479 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
480 | ||
481 | (*wakeup_hb_checker)++; | |
482 | return; | |
483 | } | |
484 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
485 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 486 | |
09358972 RH |
487 | if (!part_setup) |
488 | break; | |
489 | ||
bd3e64c1 DN |
490 | msg = container_of(msg_hdr, struct |
491 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
492 | hdr); | |
493 | args = &part->remote_openclose_args[msg->ch_number]; | |
494 | args->reason = msg->reason; | |
5b8669df | 495 | |
bd3e64c1 DN |
496 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
497 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
498 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 499 | |
bd3e64c1 DN |
500 | xpc_wakeup_channel_mgr(part); |
501 | break; | |
502 | } | |
503 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
504 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 505 | |
09358972 RH |
506 | if (!part_setup) |
507 | break; | |
508 | ||
bd3e64c1 DN |
509 | msg = container_of(msg_hdr, struct |
510 | xpc_activate_mq_msg_chctl_closereply_uv, | |
511 | hdr); | |
5b8669df | 512 | |
bd3e64c1 DN |
513 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
514 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
515 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 516 | |
bd3e64c1 DN |
517 | xpc_wakeup_channel_mgr(part); |
518 | break; | |
519 | } | |
520 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { | |
521 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
522 | ||
09358972 RH |
523 | if (!part_setup) |
524 | break; | |
525 | ||
bd3e64c1 DN |
526 | msg = container_of(msg_hdr, struct |
527 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
528 | hdr); | |
529 | args = &part->remote_openclose_args[msg->ch_number]; | |
530 | args->entry_size = msg->entry_size; | |
531 | args->local_nentries = msg->local_nentries; | |
532 | ||
533 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
534 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
535 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
536 | ||
537 | xpc_wakeup_channel_mgr(part); | |
538 | break; | |
539 | } | |
540 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
541 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
542 | ||
09358972 RH |
543 | if (!part_setup) |
544 | break; | |
545 | ||
bd3e64c1 DN |
546 | msg = container_of(msg_hdr, struct |
547 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
548 | args = &part->remote_openclose_args[msg->ch_number]; | |
549 | args->remote_nentries = msg->remote_nentries; | |
550 | args->local_nentries = msg->local_nentries; | |
6f2584f4 | 551 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
bd3e64c1 DN |
552 | |
553 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
554 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
555 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
556 | ||
557 | xpc_wakeup_channel_mgr(part); | |
558 | break; | |
559 | } | |
efdd06ed RH |
560 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { |
561 | struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; | |
562 | ||
09358972 RH |
563 | if (!part_setup) |
564 | break; | |
565 | ||
efdd06ed RH |
566 | msg = container_of(msg_hdr, struct |
567 | xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); | |
568 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
569 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; | |
570 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
571 | ||
572 | xpc_wakeup_channel_mgr(part); | |
573 | } | |
bd3e64c1 DN |
574 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: |
575 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
576 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
577 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
578 | break; | |
579 | ||
580 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
581 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
582 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
583 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
584 | break; | |
585 | ||
586 | default: | |
587 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
588 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
589 | ||
590 | /* get hb checker to deactivate from the remote partition */ | |
591 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
592 | if (part_uv->act_state_req == 0) | |
593 | xpc_activate_IRQ_rcvd++; | |
594 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
595 | part_uv->reason = xpBadMsgType; | |
596 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 597 | |
bd3e64c1 DN |
598 | (*wakeup_hb_checker)++; |
599 | return; | |
600 | } | |
5b8669df | 601 | |
bd3e64c1 DN |
602 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
603 | part->remote_rp_ts_jiffies != 0) { | |
604 | /* | |
605 | * ??? Does what we do here need to be sensitive to | |
606 | * ??? act_state or remote_act_state? | |
607 | */ | |
608 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
609 | if (part_uv->act_state_req == 0) | |
610 | xpc_activate_IRQ_rcvd++; | |
611 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
612 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 613 | |
bd3e64c1 DN |
614 | (*wakeup_hb_checker)++; |
615 | } | |
616 | } | |
617 | ||
618 | static irqreturn_t | |
619 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
620 | { | |
621 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
622 | short partid; | |
623 | struct xpc_partition *part; | |
624 | int wakeup_hb_checker = 0; | |
6f2584f4 | 625 | int part_referenced; |
bd3e64c1 | 626 | |
2525789b | 627 | while (1) { |
6f2584f4 | 628 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
2525789b DN |
629 | if (msg_hdr == NULL) |
630 | break; | |
bd3e64c1 DN |
631 | |
632 | partid = msg_hdr->partid; | |
633 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
634 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
635 | "received invalid partid=0x%x in message\n", | |
636 | partid); | |
637 | } else { | |
638 | part = &xpc_partitions[partid]; | |
6f2584f4 JS |
639 | |
640 | part_referenced = xpc_part_ref(part); | |
641 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
09358972 | 642 | part_referenced, |
6f2584f4 JS |
643 | &wakeup_hb_checker); |
644 | if (part_referenced) | |
bd3e64c1 | 645 | xpc_part_deref(part); |
5b8669df DN |
646 | } |
647 | ||
6f2584f4 | 648 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
5b8669df DN |
649 | } |
650 | ||
651 | if (wakeup_hb_checker) | |
652 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
653 | ||
654 | return IRQ_HANDLED; | |
655 | } | |
656 | ||
6f2584f4 JS |
657 | static enum xp_retval |
658 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, | |
659 | unsigned long gru_mq_desc_gpa) | |
660 | { | |
661 | enum xp_retval ret; | |
662 | ||
663 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, | |
664 | sizeof(struct gru_message_queue_desc)); | |
665 | if (ret == xpSuccess) | |
666 | gru_mq_desc->mq = NULL; | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
5b8669df DN |
671 | static enum xp_retval |
672 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
673 | int msg_type) | |
674 | { | |
675 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
6f2584f4 JS |
676 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
677 | struct gru_message_queue_desc *gru_mq_desc; | |
678 | unsigned long irq_flags; | |
679 | enum xp_retval ret; | |
5b8669df DN |
680 | |
681 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
682 | ||
683 | msg_hdr->type = msg_type; | |
6f2584f4 | 684 | msg_hdr->partid = xp_partition_id; |
5b8669df DN |
685 | msg_hdr->act_state = part->act_state; |
686 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
687 | ||
6f2584f4 JS |
688 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
689 | again: | |
690 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { | |
691 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; | |
692 | if (gru_mq_desc == NULL) { | |
693 | gru_mq_desc = kmalloc(sizeof(struct | |
694 | gru_message_queue_desc), | |
695 | GFP_KERNEL); | |
696 | if (gru_mq_desc == NULL) { | |
697 | ret = xpNoMemory; | |
698 | goto done; | |
699 | } | |
700 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; | |
701 | } | |
702 | ||
703 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, | |
704 | part_uv-> | |
705 | activate_gru_mq_desc_gpa); | |
706 | if (ret != xpSuccess) | |
707 | goto done; | |
708 | ||
709 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
710 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
711 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
712 | } | |
713 | ||
5b8669df | 714 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
6f2584f4 JS |
715 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
716 | msg_size); | |
717 | if (ret != xpSuccess) { | |
718 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ | |
719 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) | |
720 | goto again; | |
721 | } | |
722 | done: | |
723 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
724 | return ret; | |
5b8669df DN |
725 | } |
726 | ||
727 | static void | |
728 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
729 | size_t msg_size, int msg_type) | |
730 | { | |
731 | enum xp_retval ret; | |
732 | ||
733 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
734 | if (unlikely(ret != xpSuccess)) | |
735 | XPC_DEACTIVATE_PARTITION(part, ret); | |
736 | } | |
737 | ||
738 | static void | |
739 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
740 | void *msg, size_t msg_size, int msg_type) | |
741 | { | |
6f2584f4 | 742 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
5b8669df DN |
743 | enum xp_retval ret; |
744 | ||
745 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
746 | if (unlikely(ret != xpSuccess)) { | |
747 | if (irq_flags != NULL) | |
748 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
749 | ||
750 | XPC_DEACTIVATE_PARTITION(part, ret); | |
751 | ||
752 | if (irq_flags != NULL) | |
753 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
754 | } | |
755 | } | |
756 | ||
757 | static void | |
758 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
759 | { | |
760 | unsigned long irq_flags; | |
761 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
762 | ||
33ba3c77 | 763 | /* |
7d9d1f25 | 764 | * !!! Make our side think that the remote partition sent an activate |
a374c57b | 765 | * !!! mq message our way by doing what the activate IRQ handler would |
ea57f80c | 766 | * !!! do had one really been sent. |
33ba3c77 | 767 | */ |
5b8669df DN |
768 | |
769 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
770 | if (part_uv->act_state_req == 0) | |
771 | xpc_activate_IRQ_rcvd++; | |
772 | part_uv->act_state_req = act_state_req; | |
773 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
774 | ||
775 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
776 | } |
777 | ||
94bd2708 | 778 | static enum xp_retval |
5b8669df DN |
779 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
780 | size_t *len) | |
94bd2708 | 781 | { |
7d9d1f25 DN |
782 | s64 status; |
783 | enum xp_retval ret; | |
784 | ||
785 | #if defined CONFIG_X86_64 | |
786 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
787 | (u64 *)len); | |
788 | if (status == BIOS_STATUS_SUCCESS) | |
789 | ret = xpSuccess; | |
790 | else if (status == BIOS_STATUS_MORE_PASSES) | |
791 | ret = xpNeedMoreInfo; | |
792 | else | |
793 | ret = xpBiosError; | |
794 | ||
795 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
796 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
797 | if (status == SALRET_OK) | |
798 | ret = xpSuccess; | |
799 | else if (status == SALRET_MORE_PASSES) | |
800 | ret = xpNeedMoreInfo; | |
801 | else | |
802 | ret = xpSalError; | |
803 | ||
804 | #else | |
805 | #error not a supported configuration | |
806 | #endif | |
807 | ||
808 | return ret; | |
5b8669df DN |
809 | } |
810 | ||
811 | static int | |
a7665b0a | 812 | xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) |
5b8669df | 813 | { |
a374c57b RH |
814 | xpc_heartbeat_uv = |
815 | &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; | |
816 | rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); | |
817 | rp->sn.uv.activate_gru_mq_desc_gpa = | |
6f2584f4 | 818 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); |
5b8669df DN |
819 | return 0; |
820 | } | |
821 | ||
822 | static void | |
a374c57b | 823 | xpc_allow_hb_uv(short partid) |
5b8669df | 824 | { |
a374c57b | 825 | } |
5b8669df | 826 | |
a374c57b RH |
827 | static void |
828 | xpc_disallow_hb_uv(short partid) | |
829 | { | |
830 | } | |
5b8669df | 831 | |
a374c57b RH |
832 | static void |
833 | xpc_disallow_all_hbs_uv(void) | |
834 | { | |
94bd2708 DN |
835 | } |
836 | ||
33ba3c77 DN |
837 | static void |
838 | xpc_increment_heartbeat_uv(void) | |
839 | { | |
a374c57b | 840 | xpc_heartbeat_uv->value++; |
5b8669df DN |
841 | } |
842 | ||
843 | static void | |
844 | xpc_offline_heartbeat_uv(void) | |
845 | { | |
a374c57b RH |
846 | xpc_increment_heartbeat_uv(); |
847 | xpc_heartbeat_uv->offline = 1; | |
5b8669df DN |
848 | } |
849 | ||
850 | static void | |
851 | xpc_online_heartbeat_uv(void) | |
852 | { | |
a374c57b RH |
853 | xpc_increment_heartbeat_uv(); |
854 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
855 | } |
856 | ||
857 | static void | |
858 | xpc_heartbeat_init_uv(void) | |
859 | { | |
a374c57b RH |
860 | xpc_heartbeat_uv->value = 1; |
861 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
862 | } |
863 | ||
864 | static void | |
865 | xpc_heartbeat_exit_uv(void) | |
866 | { | |
a374c57b | 867 | xpc_offline_heartbeat_uv(); |
5b8669df DN |
868 | } |
869 | ||
870 | static enum xp_retval | |
871 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
872 | { | |
873 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
a374c57b | 874 | enum xp_retval ret; |
5b8669df | 875 | |
a374c57b RH |
876 | ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), |
877 | part_uv->heartbeat_gpa, | |
878 | sizeof(struct xpc_heartbeat_uv)); | |
879 | if (ret != xpSuccess) | |
880 | return ret; | |
5b8669df | 881 | |
a374c57b RH |
882 | if (part_uv->cached_heartbeat.value == part->last_heartbeat && |
883 | !part_uv->cached_heartbeat.offline) { | |
5b8669df | 884 | |
a374c57b RH |
885 | ret = xpNoHeartbeat; |
886 | } else { | |
887 | part->last_heartbeat = part_uv->cached_heartbeat.value; | |
5b8669df DN |
888 | } |
889 | return ret; | |
33ba3c77 DN |
890 | } |
891 | ||
892 | static void | |
a47d5dac | 893 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 894 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
895 | { |
896 | short partid = remote_rp->SAL_partid; | |
897 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 898 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 899 | |
5b8669df DN |
900 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
901 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
a374c57b | 902 | part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; |
6f2584f4 | 903 | part->sn.uv.activate_gru_mq_desc_gpa = |
a374c57b | 904 | remote_rp->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
905 | |
906 | /* | |
907 | * ??? Is it a good idea to make this conditional on what is | |
908 | * ??? potentially stale state information? | |
909 | */ | |
910 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
911 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
a374c57b | 912 | msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; |
6f2584f4 | 913 | msg.activate_gru_mq_desc_gpa = |
a374c57b | 914 | xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
915 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
916 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
917 | } | |
33ba3c77 | 918 | |
5b8669df DN |
919 | if (part->act_state == XPC_P_AS_INACTIVE) |
920 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
921 | } |
922 | ||
a47d5dac DN |
923 | static void |
924 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
925 | { | |
5b8669df DN |
926 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
927 | } | |
928 | ||
929 | static void | |
930 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
931 | { | |
932 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
933 | ||
934 | /* | |
935 | * ??? Is it a good idea to make this conditional on what is | |
936 | * ??? potentially stale state information? | |
937 | */ | |
938 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
939 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
940 | ||
941 | msg.reason = part->reason; | |
942 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
943 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
944 | } | |
a47d5dac DN |
945 | } |
946 | ||
bd3e64c1 DN |
947 | static void |
948 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
949 | { | |
950 | /* nothing needs to be done */ | |
951 | return; | |
952 | } | |
953 | ||
954 | static void | |
955 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
956 | { | |
957 | head->first = NULL; | |
958 | head->last = NULL; | |
959 | spin_lock_init(&head->lock); | |
960 | head->n_entries = 0; | |
961 | } | |
962 | ||
963 | static void * | |
964 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
965 | { | |
966 | unsigned long irq_flags; | |
967 | struct xpc_fifo_entry_uv *first; | |
968 | ||
969 | spin_lock_irqsave(&head->lock, irq_flags); | |
970 | first = head->first; | |
971 | if (head->first != NULL) { | |
972 | head->first = first->next; | |
973 | if (head->first == NULL) | |
974 | head->last = NULL; | |
15b87d67 RH |
975 | |
976 | head->n_entries--; | |
977 | BUG_ON(head->n_entries < 0); | |
978 | ||
979 | first->next = NULL; | |
bd3e64c1 | 980 | } |
bd3e64c1 | 981 | spin_unlock_irqrestore(&head->lock, irq_flags); |
bd3e64c1 DN |
982 | return first; |
983 | } | |
984 | ||
985 | static void | |
986 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, | |
987 | struct xpc_fifo_entry_uv *last) | |
988 | { | |
989 | unsigned long irq_flags; | |
990 | ||
991 | last->next = NULL; | |
992 | spin_lock_irqsave(&head->lock, irq_flags); | |
993 | if (head->last != NULL) | |
994 | head->last->next = last; | |
995 | else | |
996 | head->first = last; | |
997 | head->last = last; | |
6f2584f4 | 998 | head->n_entries++; |
bd3e64c1 DN |
999 | spin_unlock_irqrestore(&head->lock, irq_flags); |
1000 | } | |
1001 | ||
1002 | static int | |
1003 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) | |
1004 | { | |
1005 | return head->n_entries; | |
1006 | } | |
1007 | ||
e17d416b | 1008 | /* |
5b8669df | 1009 | * Setup the channel structures that are uv specific. |
e17d416b DN |
1010 | */ |
1011 | static enum xp_retval | |
a7665b0a | 1012 | xpc_setup_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 1013 | { |
bd3e64c1 DN |
1014 | struct xpc_channel_uv *ch_uv; |
1015 | int ch_number; | |
1016 | ||
1017 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { | |
1018 | ch_uv = &part->channels[ch_number].sn.uv; | |
1019 | ||
1020 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1021 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1022 | } | |
1023 | ||
1024 | return xpSuccess; | |
e17d416b DN |
1025 | } |
1026 | ||
1027 | /* | |
5b8669df | 1028 | * Teardown the channel structures that are uv specific. |
e17d416b DN |
1029 | */ |
1030 | static void | |
a7665b0a | 1031 | xpc_teardown_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 1032 | { |
bd3e64c1 | 1033 | /* nothing needs to be done */ |
e17d416b DN |
1034 | return; |
1035 | } | |
1036 | ||
1037 | static enum xp_retval | |
1038 | xpc_make_first_contact_uv(struct xpc_partition *part) | |
1039 | { | |
5b8669df DN |
1040 | struct xpc_activate_mq_msg_uv msg; |
1041 | ||
1042 | /* | |
1043 | * We send a sync msg to get the remote partition's remote_act_state | |
1044 | * updated to our current act_state which at this point should | |
1045 | * be XPC_P_AS_ACTIVATING. | |
1046 | */ | |
1047 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1048 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); | |
1049 | ||
dbd2918e RH |
1050 | while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) || |
1051 | (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) { | |
5b8669df DN |
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 | ||
efdd06ed RH |
1245 | static void |
1246 | xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1247 | { | |
1248 | struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; | |
1249 | ||
1250 | msg.ch_number = ch->number; | |
1251 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1252 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); | |
1253 | } | |
1254 | ||
bd3e64c1 DN |
1255 | static void |
1256 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1257 | { | |
1258 | unsigned long irq_flags; | |
1259 | ||
1260 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1261 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1262 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1263 | ||
1264 | xpc_wakeup_channel_mgr(part); | |
1265 | } | |
1266 | ||
6f2584f4 | 1267 | static enum xp_retval |
5b8669df | 1268 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
6f2584f4 | 1269 | unsigned long gru_mq_desc_gpa) |
5b8669df | 1270 | { |
6f2584f4 JS |
1271 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
1272 | ||
1273 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); | |
1274 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, | |
1275 | gru_mq_desc_gpa); | |
5b8669df DN |
1276 | } |
1277 | ||
1278 | static void | |
1279 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1280 | { | |
1281 | struct xpc_activate_mq_msg_uv msg; | |
1282 | ||
1283 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1284 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1285 | } | |
1286 | ||
1287 | static void | |
1288 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1289 | { | |
1290 | struct xpc_activate_mq_msg_uv msg; | |
1291 | ||
1292 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1293 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1294 | } | |
1295 | ||
1296 | static void | |
1297 | xpc_assume_partition_disengaged_uv(short partid) | |
1298 | { | |
1299 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1300 | unsigned long irq_flags; | |
1301 | ||
1302 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1303 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1304 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1305 | } | |
1306 | ||
1307 | static int | |
1308 | xpc_partition_engaged_uv(short partid) | |
1309 | { | |
1310 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1311 | } | |
1312 | ||
1313 | static int | |
1314 | xpc_any_partition_engaged_uv(void) | |
1315 | { | |
1316 | struct xpc_partition_uv *part_uv; | |
1317 | short partid; | |
1318 | ||
1319 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1320 | part_uv = &xpc_partitions[partid].sn.uv; | |
1321 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1322 | return 1; | |
1323 | } | |
1324 | return 0; | |
e17d416b DN |
1325 | } |
1326 | ||
bd3e64c1 DN |
1327 | static enum xp_retval |
1328 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1329 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1330 | { | |
1331 | enum xp_retval ret; | |
1332 | struct xpc_send_msg_slot_uv *msg_slot; | |
1333 | struct xpc_fifo_entry_uv *entry; | |
1334 | ||
1335 | while (1) { | |
1336 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1337 | if (entry != NULL) | |
1338 | break; | |
1339 | ||
1340 | if (flags & XPC_NOWAIT) | |
1341 | return xpNoWait; | |
1342 | ||
1343 | ret = xpc_allocate_msg_wait(ch); | |
1344 | if (ret != xpInterrupted && ret != xpTimeout) | |
1345 | return ret; | |
1346 | } | |
1347 | ||
1348 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1349 | *address_of_msg_slot = msg_slot; | |
1350 | return xpSuccess; | |
1351 | } | |
1352 | ||
1353 | static void | |
1354 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1355 | struct xpc_send_msg_slot_uv *msg_slot) | |
1356 | { | |
1357 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1358 | ||
1359 | /* wakeup anyone waiting for a free msg slot */ | |
1360 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1361 | wake_up(&ch->msg_allocate_wq); | |
1362 | } | |
1363 | ||
1364 | static void | |
1365 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1366 | struct xpc_send_msg_slot_uv *msg_slot, | |
1367 | enum xp_retval reason) | |
1368 | { | |
1369 | xpc_notify_func func = msg_slot->func; | |
1370 | ||
1371 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1372 | ||
1373 | atomic_dec(&ch->n_to_notify); | |
1374 | ||
1375 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1376 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1377 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1378 | ||
1379 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1380 | ||
1381 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1382 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1383 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | static void | |
1388 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1389 | struct xpc_notify_mq_msg_uv *msg) | |
1390 | { | |
1391 | struct xpc_send_msg_slot_uv *msg_slot; | |
1392 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1393 | ||
1394 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1395 | ||
1396 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1397 | msg_slot->msg_slot_number += ch->local_nentries; | |
1398 | ||
1399 | if (msg_slot->func != NULL) | |
1400 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1401 | ||
1402 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1403 | } | |
1404 | ||
1405 | static void | |
1406 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1407 | struct xpc_notify_mq_msg_uv *msg) | |
1408 | { | |
1409 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1410 | struct xpc_channel *ch; | |
1411 | struct xpc_channel_uv *ch_uv; | |
1412 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1413 | unsigned long irq_flags; | |
1414 | int ch_number = msg->hdr.ch_number; | |
1415 | ||
1416 | if (unlikely(ch_number >= part->nchannels)) { | |
1417 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1418 | "channel number=0x%x in message from partid=%d\n", | |
1419 | ch_number, XPC_PARTID(part)); | |
1420 | ||
1421 | /* get hb checker to deactivate from the remote partition */ | |
1422 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1423 | if (part_uv->act_state_req == 0) | |
1424 | xpc_activate_IRQ_rcvd++; | |
1425 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1426 | part_uv->reason = xpBadChannelNumber; | |
1427 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1428 | ||
1429 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1430 | return; | |
1431 | } | |
1432 | ||
1433 | ch = &part->channels[ch_number]; | |
1434 | xpc_msgqueue_ref(ch); | |
1435 | ||
1436 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1437 | xpc_msgqueue_deref(ch); | |
1438 | return; | |
1439 | } | |
1440 | ||
1441 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1442 | if (msg->hdr.size == 0) { | |
1443 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1444 | xpc_msgqueue_deref(ch); | |
1445 | return; | |
1446 | } | |
1447 | ||
1448 | /* we're dealing with a normal message sent via the notify_mq */ | |
1449 | ch_uv = &ch->sn.uv; | |
1450 | ||
361916a9 DN |
1451 | msg_slot = ch_uv->recv_msg_slots + |
1452 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; | |
bd3e64c1 | 1453 | |
bd3e64c1 DN |
1454 | BUG_ON(msg_slot->hdr.size != 0); |
1455 | ||
1456 | memcpy(msg_slot, msg, msg->hdr.size); | |
1457 | ||
1458 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1459 | ||
1460 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1461 | /* | |
1462 | * If there is an existing idle kthread get it to deliver | |
1463 | * the payload, otherwise we'll have to get the channel mgr | |
1464 | * for this partition to create a kthread to do the delivery. | |
1465 | */ | |
1466 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1467 | wake_up_nr(&ch->idle_wq, 1); | |
1468 | else | |
1469 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1470 | } | |
1471 | xpc_msgqueue_deref(ch); | |
1472 | } | |
1473 | ||
1474 | static irqreturn_t | |
1475 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1476 | { | |
1477 | struct xpc_notify_mq_msg_uv *msg; | |
1478 | short partid; | |
1479 | struct xpc_partition *part; | |
1480 | ||
6f2584f4 JS |
1481 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
1482 | NULL) { | |
bd3e64c1 DN |
1483 | |
1484 | partid = msg->hdr.partid; | |
1485 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1486 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1487 | "invalid partid=0x%x in message\n", partid); | |
1488 | } else { | |
1489 | part = &xpc_partitions[partid]; | |
1490 | ||
1491 | if (xpc_part_ref(part)) { | |
1492 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1493 | xpc_part_deref(part); | |
1494 | } | |
1495 | } | |
1496 | ||
6f2584f4 | 1497 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
bd3e64c1 DN |
1498 | } |
1499 | ||
1500 | return IRQ_HANDLED; | |
1501 | } | |
1502 | ||
1503 | static int | |
1504 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1505 | { | |
1506 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1507 | } | |
1508 | ||
1509 | static void | |
1510 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1511 | { | |
1512 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1513 | int ndeliverable_payloads; | |
1514 | ||
1515 | xpc_msgqueue_ref(ch); | |
1516 | ||
1517 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1518 | ||
1519 | if (ndeliverable_payloads > 0 && | |
1520 | (ch->flags & XPC_C_CONNECTED) && | |
1521 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1522 | ||
1523 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1524 | } | |
1525 | ||
1526 | xpc_msgqueue_deref(ch); | |
1527 | } | |
1528 | ||
1529 | static enum xp_retval | |
1530 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1531 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1532 | void *key) | |
1533 | { | |
1534 | enum xp_retval ret = xpSuccess; | |
1535 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1536 | struct xpc_notify_mq_msg_uv *msg; | |
1537 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1538 | size_t msg_size; | |
1539 | ||
1540 | DBUG_ON(notify_type != XPC_N_CALL); | |
1541 | ||
1542 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1543 | if (msg_size > ch->entry_size) | |
1544 | return xpPayloadTooBig; | |
1545 | ||
1546 | xpc_msgqueue_ref(ch); | |
1547 | ||
1548 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1549 | ret = ch->reason; | |
1550 | goto out_1; | |
1551 | } | |
1552 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1553 | ret = xpNotConnected; | |
1554 | goto out_1; | |
1555 | } | |
1556 | ||
1557 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1558 | if (ret != xpSuccess) | |
1559 | goto out_1; | |
1560 | ||
1561 | if (func != NULL) { | |
1562 | atomic_inc(&ch->n_to_notify); | |
1563 | ||
1564 | msg_slot->key = key; | |
69b3bb65 | 1565 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
bd3e64c1 DN |
1566 | msg_slot->func = func; |
1567 | ||
1568 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1569 | ret = ch->reason; | |
1570 | goto out_2; | |
1571 | } | |
1572 | } | |
1573 | ||
1574 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1575 | msg->hdr.partid = xp_partition_id; | |
1576 | msg->hdr.ch_number = ch->number; | |
1577 | msg->hdr.size = msg_size; | |
1578 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1579 | memcpy(&msg->payload, payload, payload_size); | |
1580 | ||
6f2584f4 JS |
1581 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
1582 | msg_size); | |
bd3e64c1 DN |
1583 | if (ret == xpSuccess) |
1584 | goto out_1; | |
1585 | ||
1586 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1587 | out_2: | |
1588 | if (func != NULL) { | |
1589 | /* | |
1590 | * Try to NULL the msg_slot's func field. If we fail, then | |
1591 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1592 | * case we need to pretend we succeeded to send the message | |
1593 | * since the user will get a callout for the disconnect error | |
1594 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1595 | * error returned here will confuse them. Additionally, since | |
1596 | * in this case the channel is being disconnected we don't need | |
1597 | * to put the the msg_slot back on the free list. | |
1598 | */ | |
1599 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1600 | ret = xpSuccess; | |
1601 | goto out_1; | |
1602 | } | |
1603 | ||
1604 | msg_slot->key = NULL; | |
1605 | atomic_dec(&ch->n_to_notify); | |
1606 | } | |
1607 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1608 | out_1: | |
1609 | xpc_msgqueue_deref(ch); | |
1610 | return ret; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1615 | * is unknown because the channel is now disconnecting. | |
1616 | * | |
1617 | * We don't worry about putting these msg_slots on the free list since the | |
1618 | * msg_slots themselves are about to be kfree'd. | |
1619 | */ | |
1620 | static void | |
1621 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1622 | { | |
1623 | struct xpc_send_msg_slot_uv *msg_slot; | |
1624 | int entry; | |
1625 | ||
1626 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1627 | ||
1628 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1629 | ||
1630 | if (atomic_read(&ch->n_to_notify) == 0) | |
1631 | break; | |
1632 | ||
1633 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1634 | if (msg_slot->func != NULL) | |
1635 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * Get the next deliverable message's payload. | |
1641 | */ | |
1642 | static void * | |
1643 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1644 | { | |
1645 | struct xpc_fifo_entry_uv *entry; | |
1646 | struct xpc_notify_mq_msg_uv *msg; | |
1647 | void *payload = NULL; | |
1648 | ||
1649 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1650 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1651 | if (entry != NULL) { | |
1652 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1653 | hdr.u.next); | |
1654 | payload = &msg->payload; | |
1655 | } | |
1656 | } | |
1657 | return payload; | |
1658 | } | |
1659 | ||
1660 | static void | |
1661 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1662 | { |
bd3e64c1 DN |
1663 | struct xpc_notify_mq_msg_uv *msg; |
1664 | enum xp_retval ret; | |
1665 | ||
1666 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1667 | ||
1668 | /* return an ACK to the sender of this message */ | |
1669 | ||
1670 | msg->hdr.partid = xp_partition_id; | |
1671 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1672 | ||
6f2584f4 | 1673 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
bd3e64c1 DN |
1674 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
1675 | if (ret != xpSuccess) | |
1676 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
e17d416b DN |
1677 | } |
1678 | ||
a7665b0a RH |
1679 | static struct xpc_arch_operations xpc_arch_ops_uv = { |
1680 | .setup_partitions = xpc_setup_partitions_uv, | |
1681 | .teardown_partitions = xpc_teardown_partitions_uv, | |
1682 | .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, | |
1683 | .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, | |
1684 | .setup_rsvd_page = xpc_setup_rsvd_page_uv, | |
1685 | ||
1686 | .allow_hb = xpc_allow_hb_uv, | |
1687 | .disallow_hb = xpc_disallow_hb_uv, | |
1688 | .disallow_all_hbs = xpc_disallow_all_hbs_uv, | |
1689 | .increment_heartbeat = xpc_increment_heartbeat_uv, | |
1690 | .offline_heartbeat = xpc_offline_heartbeat_uv, | |
1691 | .online_heartbeat = xpc_online_heartbeat_uv, | |
1692 | .heartbeat_init = xpc_heartbeat_init_uv, | |
1693 | .heartbeat_exit = xpc_heartbeat_exit_uv, | |
1694 | .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, | |
1695 | ||
1696 | .request_partition_activation = | |
1697 | xpc_request_partition_activation_uv, | |
1698 | .request_partition_reactivation = | |
1699 | xpc_request_partition_reactivation_uv, | |
1700 | .request_partition_deactivation = | |
1701 | xpc_request_partition_deactivation_uv, | |
1702 | .cancel_partition_deactivation_request = | |
1703 | xpc_cancel_partition_deactivation_request_uv, | |
1704 | ||
1705 | .setup_ch_structures = xpc_setup_ch_structures_uv, | |
1706 | .teardown_ch_structures = xpc_teardown_ch_structures_uv, | |
1707 | ||
1708 | .make_first_contact = xpc_make_first_contact_uv, | |
1709 | ||
1710 | .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, | |
1711 | .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, | |
1712 | .send_chctl_closereply = xpc_send_chctl_closereply_uv, | |
1713 | .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, | |
1714 | .send_chctl_openreply = xpc_send_chctl_openreply_uv, | |
1715 | .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, | |
1716 | .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, | |
1717 | ||
1718 | .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, | |
1719 | ||
1720 | .setup_msg_structures = xpc_setup_msg_structures_uv, | |
1721 | .teardown_msg_structures = xpc_teardown_msg_structures_uv, | |
1722 | ||
1723 | .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, | |
1724 | .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, | |
1725 | .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, | |
1726 | .partition_engaged = xpc_partition_engaged_uv, | |
1727 | .any_partition_engaged = xpc_any_partition_engaged_uv, | |
1728 | ||
1729 | .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, | |
1730 | .send_payload = xpc_send_payload_uv, | |
1731 | .get_deliverable_payload = xpc_get_deliverable_payload_uv, | |
1732 | .received_payload = xpc_received_payload_uv, | |
1733 | .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, | |
1734 | }; | |
1735 | ||
7838f994 RH |
1736 | static int |
1737 | xpc_init_mq_node(int nid) | |
1738 | { | |
1739 | int cpu; | |
1740 | ||
1741 | get_online_cpus(); | |
1742 | ||
1743 | for_each_cpu(cpu, cpumask_of_node(nid)) { | |
1744 | xpc_activate_mq_uv = | |
1745 | xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, nid, | |
1746 | XPC_ACTIVATE_IRQ_NAME, | |
1747 | xpc_handle_activate_IRQ_uv); | |
1748 | if (!IS_ERR(xpc_activate_mq_uv)) | |
1749 | break; | |
1750 | } | |
1751 | if (IS_ERR(xpc_activate_mq_uv)) { | |
1752 | put_online_cpus(); | |
1753 | return PTR_ERR(xpc_activate_mq_uv); | |
1754 | } | |
1755 | ||
1756 | for_each_cpu(cpu, cpumask_of_node(nid)) { | |
1757 | xpc_notify_mq_uv = | |
1758 | xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, nid, | |
1759 | XPC_NOTIFY_IRQ_NAME, | |
1760 | xpc_handle_notify_IRQ_uv); | |
1761 | if (!IS_ERR(xpc_notify_mq_uv)) | |
1762 | break; | |
1763 | } | |
1764 | if (IS_ERR(xpc_notify_mq_uv)) { | |
1765 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1766 | put_online_cpus(); | |
1767 | return PTR_ERR(xpc_notify_mq_uv); | |
1768 | } | |
1769 | ||
1770 | put_online_cpus(); | |
1771 | return 0; | |
1772 | } | |
1773 | ||
5b8669df | 1774 | int |
94bd2708 DN |
1775 | xpc_init_uv(void) |
1776 | { | |
7838f994 RH |
1777 | int nid; |
1778 | int ret = 0; | |
1779 | ||
a7665b0a | 1780 | xpc_arch_ops = xpc_arch_ops_uv; |
bd3e64c1 DN |
1781 | |
1782 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1783 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1784 | XPC_MSG_HDR_MAX_SIZE); | |
1785 | return -E2BIG; | |
1786 | } | |
5b8669df | 1787 | |
7838f994 RH |
1788 | if (xpc_mq_node < 0) |
1789 | for_each_online_node(nid) { | |
1790 | ret = xpc_init_mq_node(nid); | |
5b8669df | 1791 | |
7838f994 RH |
1792 | if (!ret) |
1793 | break; | |
1794 | } | |
1795 | else | |
1796 | ret = xpc_init_mq_node(xpc_mq_node); | |
bd3e64c1 | 1797 | |
7838f994 RH |
1798 | if (ret < 0) |
1799 | dev_err(xpc_part, "xpc_init_mq_node() returned error=%d\n", | |
1800 | -ret); | |
1801 | ||
1802 | return ret; | |
94bd2708 DN |
1803 | } |
1804 | ||
1805 | void | |
1806 | xpc_exit_uv(void) | |
1807 | { | |
2525789b DN |
1808 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1809 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1810 | } |
7838f994 RH |
1811 | |
1812 | module_param(xpc_mq_node, int, 0); | |
1813 | MODULE_PARM_DESC(xpc_mq_node, "Node number on which to allocate message queues."); |