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> | |
2525789b | 21 | #include <linux/err.h> |
261f3b49 | 22 | #include <asm/uv/uv_hub.h> |
2525789b DN |
23 | #if defined CONFIG_X86_64 |
24 | #include <asm/uv/bios.h> | |
25 | #include <asm/uv/uv_irq.h> | |
26 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
27 | #include <asm/sn/intr.h> | |
28 | #include <asm/sn/sn_sal.h> | |
29 | #endif | |
5b8669df | 30 | #include "../sgi-gru/gru.h" |
261f3b49 | 31 | #include "../sgi-gru/grukservices.h" |
94bd2708 DN |
32 | #include "xpc.h" |
33 | ||
6f2584f4 JS |
34 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
35 | struct uv_IO_APIC_route_entry { | |
36 | __u64 vector : 8, | |
37 | delivery_mode : 3, | |
38 | dest_mode : 1, | |
39 | delivery_status : 1, | |
40 | polarity : 1, | |
41 | __reserved_1 : 1, | |
42 | trigger : 1, | |
43 | mask : 1, | |
44 | __reserved_2 : 15, | |
45 | dest : 32; | |
46 | }; | |
47 | #endif | |
48 | ||
a374c57b | 49 | static struct xpc_heartbeat_uv *xpc_heartbeat_uv; |
33ba3c77 | 50 | |
5b8669df | 51 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
52 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
53 | XPC_ACTIVATE_MSG_SIZE_UV) | |
54 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 55 | |
2525789b DN |
56 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
57 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
58 | XPC_NOTIFY_MSG_SIZE_UV) | |
59 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 60 | |
2525789b DN |
61 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
62 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
63 | |
64 | static int | |
a7665b0a | 65 | xpc_setup_partitions_uv(void) |
5b8669df DN |
66 | { |
67 | short partid; | |
68 | struct xpc_partition_uv *part_uv; | |
69 | ||
70 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
71 | part_uv = &xpc_partitions[partid].sn.uv; | |
72 | ||
6f2584f4 | 73 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
5b8669df DN |
74 | spin_lock_init(&part_uv->flags_lock); |
75 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
6f2584f4 | 80 | static void |
a7665b0a | 81 | xpc_teardown_partitions_uv(void) |
6f2584f4 JS |
82 | { |
83 | short partid; | |
84 | struct xpc_partition_uv *part_uv; | |
85 | unsigned long irq_flags; | |
86 | ||
87 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
88 | part_uv = &xpc_partitions[partid].sn.uv; | |
89 | ||
90 | if (part_uv->cached_activate_gru_mq_desc != NULL) { | |
91 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
92 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
93 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
94 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
95 | kfree(part_uv->cached_activate_gru_mq_desc); | |
96 | part_uv->cached_activate_gru_mq_desc = NULL; | |
97 | mutex_unlock(&part_uv-> | |
98 | cached_activate_gru_mq_desc_mutex); | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
2525789b DN |
103 | static int |
104 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
105 | { | |
6f2584f4 JS |
106 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
107 | ||
2525789b | 108 | #if defined CONFIG_X86_64 |
6c2c5029 DS |
109 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset, |
110 | UV_AFFINITY_CPU); | |
2525789b DN |
111 | if (mq->irq < 0) { |
112 | dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", | |
6f2584f4 JS |
113 | -mq->irq); |
114 | return mq->irq; | |
2525789b DN |
115 | } |
116 | ||
6f2584f4 | 117 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
2525789b | 118 | |
6f2584f4 | 119 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
2525789b DN |
120 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
121 | mq->irq = SGI_XPC_ACTIVATE; | |
122 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
123 | mq->irq = SGI_XPC_NOTIFY; | |
124 | else | |
125 | return -EINVAL; | |
126 | ||
6f2584f4 JS |
127 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
128 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); | |
2525789b DN |
129 | #else |
130 | #error not a supported configuration | |
131 | #endif | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static void | |
137 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
138 | { | |
139 | #if defined CONFIG_X86_64 | |
6c2c5029 | 140 | uv_teardown_irq(mq->irq); |
2525789b DN |
141 | |
142 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
143 | int mmr_pnode; | |
144 | unsigned long mmr_value; | |
145 | ||
146 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
147 | mmr_value = 1UL << 16; | |
148 | ||
149 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
150 | #else | |
151 | #error not a supported configuration | |
152 | #endif | |
153 | } | |
154 | ||
155 | static int | |
156 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
157 | { | |
158 | int ret; | |
159 | ||
160 | #if defined CONFIG_X86_64 | |
c8182f00 RA |
161 | ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), |
162 | mq->order, &mq->mmr_offset); | |
2525789b DN |
163 | if (ret < 0) { |
164 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
165 | "ret=%d\n", ret); | |
166 | return ret; | |
167 | } | |
168 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
6f2584f4 | 169 | ret = sn_mq_watchlist_alloc(mq->mmr_blade, (void *)uv_gpa(mq->address), |
c8182f00 | 170 | mq->order, &mq->mmr_offset); |
2525789b DN |
171 | if (ret < 0) { |
172 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
173 | ret); | |
174 | return -EBUSY; | |
175 | } | |
176 | #else | |
177 | #error not a supported configuration | |
178 | #endif | |
179 | ||
180 | mq->watchlist_num = ret; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static void | |
185 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
186 | { | |
187 | int ret; | |
188 | ||
189 | #if defined CONFIG_X86_64 | |
190 | ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
191 | BUG_ON(ret != BIOS_STATUS_SUCCESS); | |
192 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
193 | ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
194 | BUG_ON(ret != SALRET_OK); | |
195 | #else | |
196 | #error not a supported configuration | |
197 | #endif | |
198 | } | |
199 | ||
200 | static struct xpc_gru_mq_uv * | |
201 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
202 | irq_handler_t irq_handler) |
203 | { | |
2525789b | 204 | enum xp_retval xp_ret; |
5b8669df DN |
205 | int ret; |
206 | int nid; | |
2525789b | 207 | int pg_order; |
5b8669df | 208 | struct page *page; |
2525789b | 209 | struct xpc_gru_mq_uv *mq; |
6f2584f4 | 210 | struct uv_IO_APIC_route_entry *mmr_value; |
2525789b DN |
211 | |
212 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
213 | if (mq == NULL) { | |
214 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
215 | "a xpc_gru_mq_uv structure\n"); | |
216 | ret = -ENOMEM; | |
6f2584f4 JS |
217 | goto out_0; |
218 | } | |
219 | ||
220 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), | |
221 | GFP_KERNEL); | |
222 | if (mq->gru_mq_desc == NULL) { | |
223 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
224 | "a gru_message_queue_desc structure\n"); | |
225 | ret = -ENOMEM; | |
2525789b DN |
226 | goto out_1; |
227 | } | |
5b8669df | 228 | |
2525789b DN |
229 | pg_order = get_order(mq_size); |
230 | mq->order = pg_order + PAGE_SHIFT; | |
231 | mq_size = 1UL << mq->order; | |
232 | ||
233 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
234 | ||
235 | nid = cpu_to_node(cpu); | |
6484eb3e | 236 | page = alloc_pages_exact_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE, |
2525789b | 237 | pg_order); |
bd3e64c1 DN |
238 | if (page == NULL) { |
239 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
240 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
241 | ret = -ENOMEM; |
242 | goto out_2; | |
bd3e64c1 | 243 | } |
2525789b | 244 | mq->address = page_address(page); |
5b8669df | 245 | |
2525789b DN |
246 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
247 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
248 | if (ret != 0) | |
249 | goto out_3; | |
5b8669df | 250 | |
2525789b DN |
251 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
252 | if (ret != 0) | |
253 | goto out_4; | |
254 | ||
255 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
256 | if (ret != 0) { |
257 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
6f2584f4 | 258 | mq->irq, -ret); |
2525789b | 259 | goto out_5; |
5b8669df DN |
260 | } |
261 | ||
6f2584f4 JS |
262 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
263 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, | |
264 | nid, mmr_value->vector, mmr_value->dest); | |
265 | if (ret != 0) { | |
266 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
267 | "error=%d\n", ret); | |
268 | ret = -EINVAL; | |
269 | goto out_6; | |
270 | } | |
271 | ||
2525789b DN |
272 | /* allow other partitions to access this GRU mq */ |
273 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
274 | if (xp_ret != xpSuccess) { | |
275 | ret = -EACCES; | |
276 | goto out_6; | |
277 | } | |
5b8669df DN |
278 | |
279 | return mq; | |
2525789b DN |
280 | |
281 | /* something went wrong */ | |
282 | out_6: | |
283 | free_irq(mq->irq, NULL); | |
284 | out_5: | |
285 | xpc_release_gru_mq_irq_uv(mq); | |
286 | out_4: | |
287 | xpc_gru_mq_watchlist_free_uv(mq); | |
288 | out_3: | |
289 | free_pages((unsigned long)mq->address, pg_order); | |
290 | out_2: | |
6f2584f4 | 291 | kfree(mq->gru_mq_desc); |
2525789b | 292 | out_1: |
6f2584f4 JS |
293 | kfree(mq); |
294 | out_0: | |
2525789b | 295 | return ERR_PTR(ret); |
5b8669df | 296 | } |
94bd2708 | 297 | |
33ba3c77 | 298 | static void |
2525789b | 299 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 300 | { |
2525789b DN |
301 | unsigned int mq_size; |
302 | int pg_order; | |
303 | int ret; | |
304 | ||
305 | /* disallow other partitions to access GRU mq */ | |
306 | mq_size = 1UL << mq->order; | |
307 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
308 | BUG_ON(ret != xpSuccess); | |
309 | ||
310 | /* unregister irq handler and release mq irq/vector mapping */ | |
311 | free_irq(mq->irq, NULL); | |
312 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 313 | |
2525789b DN |
314 | /* disable generation of irq when GRU mq op occurs to this mq */ |
315 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 316 | |
2525789b DN |
317 | pg_order = mq->order - PAGE_SHIFT; |
318 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 319 | |
2525789b | 320 | kfree(mq); |
5b8669df DN |
321 | } |
322 | ||
323 | static enum xp_retval | |
6f2584f4 JS |
324 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
325 | size_t msg_size) | |
33ba3c77 | 326 | { |
5b8669df DN |
327 | enum xp_retval xp_ret; |
328 | int ret; | |
329 | ||
330 | while (1) { | |
6f2584f4 | 331 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
5b8669df DN |
332 | if (ret == MQE_OK) { |
333 | xp_ret = xpSuccess; | |
334 | break; | |
335 | } | |
336 | ||
337 | if (ret == MQE_QUEUE_FULL) { | |
338 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
339 | "error=MQE_QUEUE_FULL\n"); | |
340 | /* !!! handle QLimit reached; delay & try again */ | |
341 | /* ??? Do we add a limit to the number of retries? */ | |
342 | (void)msleep_interruptible(10); | |
343 | } else if (ret == MQE_CONGESTION) { | |
344 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
345 | "error=MQE_CONGESTION\n"); | |
346 | /* !!! handle LB Overflow; simply try again */ | |
347 | /* ??? Do we add a limit to the number of retries? */ | |
348 | } else { | |
349 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
350 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
351 | "error=%d\n", ret); | |
352 | xp_ret = xpGruSendMqError; | |
353 | break; | |
354 | } | |
355 | } | |
356 | return xp_ret; | |
357 | } | |
358 | ||
359 | static void | |
360 | xpc_process_activate_IRQ_rcvd_uv(void) | |
361 | { | |
362 | unsigned long irq_flags; | |
363 | short partid; | |
364 | struct xpc_partition *part; | |
365 | u8 act_state_req; | |
366 | ||
367 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
368 | ||
369 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
370 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
371 | part = &xpc_partitions[partid]; | |
372 | ||
373 | if (part->sn.uv.act_state_req == 0) | |
374 | continue; | |
375 | ||
376 | xpc_activate_IRQ_rcvd--; | |
377 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
378 | ||
379 | act_state_req = part->sn.uv.act_state_req; | |
380 | part->sn.uv.act_state_req = 0; | |
381 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
382 | ||
383 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
384 | if (part->act_state == XPC_P_AS_INACTIVE) | |
385 | xpc_activate_partition(part); | |
386 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
387 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
388 | ||
389 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
390 | if (part->act_state == XPC_P_AS_INACTIVE) | |
391 | xpc_activate_partition(part); | |
392 | else | |
393 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
394 | ||
395 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
396 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
397 | ||
398 | } else { | |
399 | BUG(); | |
400 | } | |
401 | ||
402 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
403 | if (xpc_activate_IRQ_rcvd == 0) | |
404 | break; | |
405 | } | |
406 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
407 | ||
408 | } | |
409 | ||
bd3e64c1 DN |
410 | static void |
411 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
412 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
413 | int *wakeup_hb_checker) | |
5b8669df DN |
414 | { |
415 | unsigned long irq_flags; | |
bd3e64c1 | 416 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 417 | struct xpc_openclose_args *args; |
5b8669df | 418 | |
bd3e64c1 | 419 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 420 | |
bd3e64c1 DN |
421 | switch (msg_hdr->type) { |
422 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
423 | /* syncing of remote_act_state was just done above */ | |
424 | break; | |
5b8669df | 425 | |
bd3e64c1 DN |
426 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { |
427 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 428 | |
bd3e64c1 DN |
429 | /* |
430 | * ??? Do we deal here with ts_jiffies being different | |
431 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
432 | * ??? below? | |
433 | */ | |
434 | msg = container_of(msg_hdr, struct | |
435 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 436 | |
bd3e64c1 DN |
437 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
438 | if (part_uv->act_state_req == 0) | |
439 | xpc_activate_IRQ_rcvd++; | |
440 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
441 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
442 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
a374c57b | 443 | part_uv->heartbeat_gpa = msg->heartbeat_gpa; |
6f2584f4 JS |
444 | |
445 | if (msg->activate_gru_mq_desc_gpa != | |
446 | part_uv->activate_gru_mq_desc_gpa) { | |
447 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
448 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
449 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
450 | part_uv->activate_gru_mq_desc_gpa = | |
451 | msg->activate_gru_mq_desc_gpa; | |
452 | } | |
bd3e64c1 | 453 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
5b8669df | 454 | |
bd3e64c1 DN |
455 | (*wakeup_hb_checker)++; |
456 | break; | |
457 | } | |
458 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
459 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 460 | |
bd3e64c1 DN |
461 | msg = container_of(msg_hdr, struct |
462 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 463 | |
bd3e64c1 DN |
464 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
465 | if (part_uv->act_state_req == 0) | |
466 | xpc_activate_IRQ_rcvd++; | |
467 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
468 | part_uv->reason = msg->reason; | |
469 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
470 | ||
471 | (*wakeup_hb_checker)++; | |
472 | return; | |
473 | } | |
474 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
475 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 476 | |
bd3e64c1 DN |
477 | msg = container_of(msg_hdr, struct |
478 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
479 | hdr); | |
480 | args = &part->remote_openclose_args[msg->ch_number]; | |
481 | args->reason = msg->reason; | |
5b8669df | 482 | |
bd3e64c1 DN |
483 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
484 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
485 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 486 | |
bd3e64c1 DN |
487 | xpc_wakeup_channel_mgr(part); |
488 | break; | |
489 | } | |
490 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
491 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 492 | |
bd3e64c1 DN |
493 | msg = container_of(msg_hdr, struct |
494 | xpc_activate_mq_msg_chctl_closereply_uv, | |
495 | hdr); | |
5b8669df | 496 | |
bd3e64c1 DN |
497 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
498 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
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_OPENREQUEST_UV: { | |
505 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
506 | ||
507 | msg = container_of(msg_hdr, struct | |
508 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
509 | hdr); | |
510 | args = &part->remote_openclose_args[msg->ch_number]; | |
511 | args->entry_size = msg->entry_size; | |
512 | args->local_nentries = msg->local_nentries; | |
513 | ||
514 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
515 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
516 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
517 | ||
518 | xpc_wakeup_channel_mgr(part); | |
519 | break; | |
520 | } | |
521 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
522 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
523 | ||
524 | msg = container_of(msg_hdr, struct | |
525 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
526 | args = &part->remote_openclose_args[msg->ch_number]; | |
527 | args->remote_nentries = msg->remote_nentries; | |
528 | args->local_nentries = msg->local_nentries; | |
6f2584f4 | 529 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
bd3e64c1 DN |
530 | |
531 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
532 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
533 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
534 | ||
535 | xpc_wakeup_channel_mgr(part); | |
536 | break; | |
537 | } | |
efdd06ed RH |
538 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { |
539 | struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; | |
540 | ||
541 | msg = container_of(msg_hdr, struct | |
542 | xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); | |
543 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
544 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; | |
545 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
546 | ||
547 | xpc_wakeup_channel_mgr(part); | |
548 | } | |
bd3e64c1 DN |
549 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: |
550 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
551 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
552 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
553 | break; | |
554 | ||
555 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
556 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
557 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
558 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
559 | break; | |
560 | ||
561 | default: | |
562 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
563 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
564 | ||
565 | /* get hb checker to deactivate from the remote partition */ | |
566 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
567 | if (part_uv->act_state_req == 0) | |
568 | xpc_activate_IRQ_rcvd++; | |
569 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
570 | part_uv->reason = xpBadMsgType; | |
571 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 572 | |
bd3e64c1 DN |
573 | (*wakeup_hb_checker)++; |
574 | return; | |
575 | } | |
5b8669df | 576 | |
bd3e64c1 DN |
577 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
578 | part->remote_rp_ts_jiffies != 0) { | |
579 | /* | |
580 | * ??? Does what we do here need to be sensitive to | |
581 | * ??? act_state or remote_act_state? | |
582 | */ | |
583 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
584 | if (part_uv->act_state_req == 0) | |
585 | xpc_activate_IRQ_rcvd++; | |
586 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
587 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 588 | |
bd3e64c1 DN |
589 | (*wakeup_hb_checker)++; |
590 | } | |
591 | } | |
592 | ||
593 | static irqreturn_t | |
594 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
595 | { | |
596 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
597 | short partid; | |
598 | struct xpc_partition *part; | |
599 | int wakeup_hb_checker = 0; | |
6f2584f4 | 600 | int part_referenced; |
bd3e64c1 | 601 | |
2525789b | 602 | while (1) { |
6f2584f4 | 603 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
2525789b DN |
604 | if (msg_hdr == NULL) |
605 | break; | |
bd3e64c1 DN |
606 | |
607 | partid = msg_hdr->partid; | |
608 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
609 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
610 | "received invalid partid=0x%x in message\n", | |
611 | partid); | |
612 | } else { | |
613 | part = &xpc_partitions[partid]; | |
6f2584f4 JS |
614 | |
615 | part_referenced = xpc_part_ref(part); | |
616 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
617 | &wakeup_hb_checker); | |
618 | if (part_referenced) | |
bd3e64c1 | 619 | xpc_part_deref(part); |
5b8669df DN |
620 | } |
621 | ||
6f2584f4 | 622 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
5b8669df DN |
623 | } |
624 | ||
625 | if (wakeup_hb_checker) | |
626 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
627 | ||
628 | return IRQ_HANDLED; | |
629 | } | |
630 | ||
6f2584f4 JS |
631 | static enum xp_retval |
632 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, | |
633 | unsigned long gru_mq_desc_gpa) | |
634 | { | |
635 | enum xp_retval ret; | |
636 | ||
637 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, | |
638 | sizeof(struct gru_message_queue_desc)); | |
639 | if (ret == xpSuccess) | |
640 | gru_mq_desc->mq = NULL; | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
5b8669df DN |
645 | static enum xp_retval |
646 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
647 | int msg_type) | |
648 | { | |
649 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
6f2584f4 JS |
650 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
651 | struct gru_message_queue_desc *gru_mq_desc; | |
652 | unsigned long irq_flags; | |
653 | enum xp_retval ret; | |
5b8669df DN |
654 | |
655 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
656 | ||
657 | msg_hdr->type = msg_type; | |
6f2584f4 | 658 | msg_hdr->partid = xp_partition_id; |
5b8669df DN |
659 | msg_hdr->act_state = part->act_state; |
660 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
661 | ||
6f2584f4 JS |
662 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
663 | again: | |
664 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { | |
665 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; | |
666 | if (gru_mq_desc == NULL) { | |
667 | gru_mq_desc = kmalloc(sizeof(struct | |
668 | gru_message_queue_desc), | |
669 | GFP_KERNEL); | |
670 | if (gru_mq_desc == NULL) { | |
671 | ret = xpNoMemory; | |
672 | goto done; | |
673 | } | |
674 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; | |
675 | } | |
676 | ||
677 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, | |
678 | part_uv-> | |
679 | activate_gru_mq_desc_gpa); | |
680 | if (ret != xpSuccess) | |
681 | goto done; | |
682 | ||
683 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
684 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
685 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
686 | } | |
687 | ||
5b8669df | 688 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
6f2584f4 JS |
689 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
690 | msg_size); | |
691 | if (ret != xpSuccess) { | |
692 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ | |
693 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) | |
694 | goto again; | |
695 | } | |
696 | done: | |
697 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
698 | return ret; | |
5b8669df DN |
699 | } |
700 | ||
701 | static void | |
702 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
703 | size_t msg_size, int msg_type) | |
704 | { | |
705 | enum xp_retval ret; | |
706 | ||
707 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
708 | if (unlikely(ret != xpSuccess)) | |
709 | XPC_DEACTIVATE_PARTITION(part, ret); | |
710 | } | |
711 | ||
712 | static void | |
713 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
714 | void *msg, size_t msg_size, int msg_type) | |
715 | { | |
6f2584f4 | 716 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
5b8669df DN |
717 | enum xp_retval ret; |
718 | ||
719 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
720 | if (unlikely(ret != xpSuccess)) { | |
721 | if (irq_flags != NULL) | |
722 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
723 | ||
724 | XPC_DEACTIVATE_PARTITION(part, ret); | |
725 | ||
726 | if (irq_flags != NULL) | |
727 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
728 | } | |
729 | } | |
730 | ||
731 | static void | |
732 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
733 | { | |
734 | unsigned long irq_flags; | |
735 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
736 | ||
33ba3c77 | 737 | /* |
7d9d1f25 | 738 | * !!! Make our side think that the remote partition sent an activate |
a374c57b | 739 | * !!! mq message our way by doing what the activate IRQ handler would |
ea57f80c | 740 | * !!! do had one really been sent. |
33ba3c77 | 741 | */ |
5b8669df DN |
742 | |
743 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
744 | if (part_uv->act_state_req == 0) | |
745 | xpc_activate_IRQ_rcvd++; | |
746 | part_uv->act_state_req = act_state_req; | |
747 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
748 | ||
749 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
750 | } |
751 | ||
94bd2708 | 752 | static enum xp_retval |
5b8669df DN |
753 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
754 | size_t *len) | |
94bd2708 | 755 | { |
7d9d1f25 DN |
756 | s64 status; |
757 | enum xp_retval ret; | |
758 | ||
759 | #if defined CONFIG_X86_64 | |
760 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
761 | (u64 *)len); | |
762 | if (status == BIOS_STATUS_SUCCESS) | |
763 | ret = xpSuccess; | |
764 | else if (status == BIOS_STATUS_MORE_PASSES) | |
765 | ret = xpNeedMoreInfo; | |
766 | else | |
767 | ret = xpBiosError; | |
768 | ||
769 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
770 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
771 | if (status == SALRET_OK) | |
772 | ret = xpSuccess; | |
773 | else if (status == SALRET_MORE_PASSES) | |
774 | ret = xpNeedMoreInfo; | |
775 | else | |
776 | ret = xpSalError; | |
777 | ||
778 | #else | |
779 | #error not a supported configuration | |
780 | #endif | |
781 | ||
782 | return ret; | |
5b8669df DN |
783 | } |
784 | ||
785 | static int | |
a7665b0a | 786 | xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) |
5b8669df | 787 | { |
a374c57b RH |
788 | xpc_heartbeat_uv = |
789 | &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; | |
790 | rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); | |
791 | rp->sn.uv.activate_gru_mq_desc_gpa = | |
6f2584f4 | 792 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); |
5b8669df DN |
793 | return 0; |
794 | } | |
795 | ||
796 | static void | |
a374c57b | 797 | xpc_allow_hb_uv(short partid) |
5b8669df | 798 | { |
a374c57b | 799 | } |
5b8669df | 800 | |
a374c57b RH |
801 | static void |
802 | xpc_disallow_hb_uv(short partid) | |
803 | { | |
804 | } | |
5b8669df | 805 | |
a374c57b RH |
806 | static void |
807 | xpc_disallow_all_hbs_uv(void) | |
808 | { | |
94bd2708 DN |
809 | } |
810 | ||
33ba3c77 DN |
811 | static void |
812 | xpc_increment_heartbeat_uv(void) | |
813 | { | |
a374c57b | 814 | xpc_heartbeat_uv->value++; |
5b8669df DN |
815 | } |
816 | ||
817 | static void | |
818 | xpc_offline_heartbeat_uv(void) | |
819 | { | |
a374c57b RH |
820 | xpc_increment_heartbeat_uv(); |
821 | xpc_heartbeat_uv->offline = 1; | |
5b8669df DN |
822 | } |
823 | ||
824 | static void | |
825 | xpc_online_heartbeat_uv(void) | |
826 | { | |
a374c57b RH |
827 | xpc_increment_heartbeat_uv(); |
828 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
829 | } |
830 | ||
831 | static void | |
832 | xpc_heartbeat_init_uv(void) | |
833 | { | |
a374c57b RH |
834 | xpc_heartbeat_uv->value = 1; |
835 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
836 | } |
837 | ||
838 | static void | |
839 | xpc_heartbeat_exit_uv(void) | |
840 | { | |
a374c57b | 841 | xpc_offline_heartbeat_uv(); |
5b8669df DN |
842 | } |
843 | ||
844 | static enum xp_retval | |
845 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
846 | { | |
847 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
a374c57b | 848 | enum xp_retval ret; |
5b8669df | 849 | |
a374c57b RH |
850 | ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), |
851 | part_uv->heartbeat_gpa, | |
852 | sizeof(struct xpc_heartbeat_uv)); | |
853 | if (ret != xpSuccess) | |
854 | return ret; | |
5b8669df | 855 | |
a374c57b RH |
856 | if (part_uv->cached_heartbeat.value == part->last_heartbeat && |
857 | !part_uv->cached_heartbeat.offline) { | |
5b8669df | 858 | |
a374c57b RH |
859 | ret = xpNoHeartbeat; |
860 | } else { | |
861 | part->last_heartbeat = part_uv->cached_heartbeat.value; | |
5b8669df DN |
862 | } |
863 | return ret; | |
33ba3c77 DN |
864 | } |
865 | ||
866 | static void | |
a47d5dac | 867 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 868 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
869 | { |
870 | short partid = remote_rp->SAL_partid; | |
871 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 872 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 873 | |
5b8669df DN |
874 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
875 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
a374c57b | 876 | part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; |
6f2584f4 | 877 | part->sn.uv.activate_gru_mq_desc_gpa = |
a374c57b | 878 | remote_rp->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
879 | |
880 | /* | |
881 | * ??? Is it a good idea to make this conditional on what is | |
882 | * ??? potentially stale state information? | |
883 | */ | |
884 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
885 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
a374c57b | 886 | msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; |
6f2584f4 | 887 | msg.activate_gru_mq_desc_gpa = |
a374c57b | 888 | xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
889 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
890 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
891 | } | |
33ba3c77 | 892 | |
5b8669df DN |
893 | if (part->act_state == XPC_P_AS_INACTIVE) |
894 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
895 | } |
896 | ||
a47d5dac DN |
897 | static void |
898 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
899 | { | |
5b8669df DN |
900 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
901 | } | |
902 | ||
903 | static void | |
904 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
905 | { | |
906 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
907 | ||
908 | /* | |
909 | * ??? Is it a good idea to make this conditional on what is | |
910 | * ??? potentially stale state information? | |
911 | */ | |
912 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
913 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
914 | ||
915 | msg.reason = part->reason; | |
916 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
917 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
918 | } | |
a47d5dac DN |
919 | } |
920 | ||
bd3e64c1 DN |
921 | static void |
922 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
923 | { | |
924 | /* nothing needs to be done */ | |
925 | return; | |
926 | } | |
927 | ||
928 | static void | |
929 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
930 | { | |
931 | head->first = NULL; | |
932 | head->last = NULL; | |
933 | spin_lock_init(&head->lock); | |
934 | head->n_entries = 0; | |
935 | } | |
936 | ||
937 | static void * | |
938 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
939 | { | |
940 | unsigned long irq_flags; | |
941 | struct xpc_fifo_entry_uv *first; | |
942 | ||
943 | spin_lock_irqsave(&head->lock, irq_flags); | |
944 | first = head->first; | |
945 | if (head->first != NULL) { | |
946 | head->first = first->next; | |
947 | if (head->first == NULL) | |
948 | head->last = NULL; | |
949 | } | |
6f2584f4 JS |
950 | head->n_entries--; |
951 | BUG_ON(head->n_entries < 0); | |
bd3e64c1 DN |
952 | spin_unlock_irqrestore(&head->lock, irq_flags); |
953 | first->next = NULL; | |
954 | return first; | |
955 | } | |
956 | ||
957 | static void | |
958 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, | |
959 | struct xpc_fifo_entry_uv *last) | |
960 | { | |
961 | unsigned long irq_flags; | |
962 | ||
963 | last->next = NULL; | |
964 | spin_lock_irqsave(&head->lock, irq_flags); | |
965 | if (head->last != NULL) | |
966 | head->last->next = last; | |
967 | else | |
968 | head->first = last; | |
969 | head->last = last; | |
6f2584f4 | 970 | head->n_entries++; |
bd3e64c1 DN |
971 | spin_unlock_irqrestore(&head->lock, irq_flags); |
972 | } | |
973 | ||
974 | static int | |
975 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) | |
976 | { | |
977 | return head->n_entries; | |
978 | } | |
979 | ||
e17d416b | 980 | /* |
5b8669df | 981 | * Setup the channel structures that are uv specific. |
e17d416b DN |
982 | */ |
983 | static enum xp_retval | |
a7665b0a | 984 | xpc_setup_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 985 | { |
bd3e64c1 DN |
986 | struct xpc_channel_uv *ch_uv; |
987 | int ch_number; | |
988 | ||
989 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { | |
990 | ch_uv = &part->channels[ch_number].sn.uv; | |
991 | ||
992 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
993 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
994 | } | |
995 | ||
996 | return xpSuccess; | |
e17d416b DN |
997 | } |
998 | ||
999 | /* | |
5b8669df | 1000 | * Teardown the channel structures that are uv specific. |
e17d416b DN |
1001 | */ |
1002 | static void | |
a7665b0a | 1003 | xpc_teardown_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 1004 | { |
bd3e64c1 | 1005 | /* nothing needs to be done */ |
e17d416b DN |
1006 | return; |
1007 | } | |
1008 | ||
1009 | static enum xp_retval | |
1010 | xpc_make_first_contact_uv(struct xpc_partition *part) | |
1011 | { | |
5b8669df DN |
1012 | struct xpc_activate_mq_msg_uv msg; |
1013 | ||
1014 | /* | |
1015 | * We send a sync msg to get the remote partition's remote_act_state | |
1016 | * updated to our current act_state which at this point should | |
1017 | * be XPC_P_AS_ACTIVATING. | |
1018 | */ | |
1019 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1020 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); | |
1021 | ||
1022 | while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) { | |
1023 | ||
1024 | dev_dbg(xpc_part, "waiting to make first contact with " | |
1025 | "partition %d\n", XPC_PARTID(part)); | |
1026 | ||
1027 | /* wait a 1/4 of a second or so */ | |
1028 | (void)msleep_interruptible(250); | |
1029 | ||
1030 | if (part->act_state == XPC_P_AS_DEACTIVATING) | |
1031 | return part->reason; | |
1032 | } | |
1033 | ||
1034 | return xpSuccess; | |
e17d416b DN |
1035 | } |
1036 | ||
1037 | static u64 | |
7fb5e59d | 1038 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
e17d416b | 1039 | { |
5b8669df DN |
1040 | unsigned long irq_flags; |
1041 | union xpc_channel_ctl_flags chctl; | |
1042 | ||
1043 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1044 | chctl = part->chctl; | |
1045 | if (chctl.all_flags != 0) | |
1046 | part->chctl.all_flags = 0; | |
1047 | ||
1048 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1049 | return chctl.all_flags; | |
1050 | } | |
1051 | ||
bd3e64c1 DN |
1052 | static enum xp_retval |
1053 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) | |
1054 | { | |
1055 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1056 | struct xpc_send_msg_slot_uv *msg_slot; | |
1057 | unsigned long irq_flags; | |
1058 | int nentries; | |
1059 | int entry; | |
1060 | size_t nbytes; | |
1061 | ||
1062 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { | |
1063 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); | |
1064 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1065 | if (ch_uv->send_msg_slots == NULL) | |
1066 | continue; | |
1067 | ||
1068 | for (entry = 0; entry < nentries; entry++) { | |
1069 | msg_slot = &ch_uv->send_msg_slots[entry]; | |
1070 | ||
1071 | msg_slot->msg_slot_number = entry; | |
1072 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, | |
1073 | &msg_slot->next); | |
1074 | } | |
1075 | ||
1076 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1077 | if (nentries < ch->local_nentries) | |
1078 | ch->local_nentries = nentries; | |
1079 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1080 | return xpSuccess; | |
1081 | } | |
1082 | ||
1083 | return xpNoMemory; | |
1084 | } | |
1085 | ||
1086 | static enum xp_retval | |
1087 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) | |
1088 | { | |
1089 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1090 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1091 | unsigned long irq_flags; | |
1092 | int nentries; | |
1093 | int entry; | |
1094 | size_t nbytes; | |
1095 | ||
1096 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { | |
1097 | nbytes = nentries * ch->entry_size; | |
1098 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1099 | if (ch_uv->recv_msg_slots == NULL) | |
1100 | continue; | |
1101 | ||
1102 | for (entry = 0; entry < nentries; entry++) { | |
361916a9 DN |
1103 | msg_slot = ch_uv->recv_msg_slots + |
1104 | entry * ch->entry_size; | |
bd3e64c1 DN |
1105 | |
1106 | msg_slot->hdr.msg_slot_number = entry; | |
1107 | } | |
1108 | ||
1109 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1110 | if (nentries < ch->remote_nentries) | |
1111 | ch->remote_nentries = nentries; | |
1112 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1113 | return xpSuccess; | |
1114 | } | |
1115 | ||
1116 | return xpNoMemory; | |
1117 | } | |
1118 | ||
1119 | /* | |
1120 | * Allocate msg_slots associated with the channel. | |
1121 | */ | |
5b8669df DN |
1122 | static enum xp_retval |
1123 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) | |
1124 | { | |
bd3e64c1 DN |
1125 | static enum xp_retval ret; |
1126 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1127 | ||
1128 | DBUG_ON(ch->flags & XPC_C_SETUP); | |
1129 | ||
6f2584f4 JS |
1130 | ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct |
1131 | gru_message_queue_desc), | |
1132 | GFP_KERNEL); | |
1133 | if (ch_uv->cached_notify_gru_mq_desc == NULL) | |
1134 | return xpNoMemory; | |
1135 | ||
bd3e64c1 DN |
1136 | ret = xpc_allocate_send_msg_slot_uv(ch); |
1137 | if (ret == xpSuccess) { | |
1138 | ||
1139 | ret = xpc_allocate_recv_msg_slot_uv(ch); | |
1140 | if (ret != xpSuccess) { | |
1141 | kfree(ch_uv->send_msg_slots); | |
1142 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1143 | } | |
1144 | } | |
1145 | return ret; | |
5b8669df DN |
1146 | } |
1147 | ||
bd3e64c1 DN |
1148 | /* |
1149 | * Free up msg_slots and clear other stuff that were setup for the specified | |
1150 | * channel. | |
1151 | */ | |
5b8669df DN |
1152 | static void |
1153 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) | |
1154 | { | |
1155 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1156 | ||
bd3e64c1 DN |
1157 | DBUG_ON(!spin_is_locked(&ch->lock)); |
1158 | ||
6f2584f4 JS |
1159 | kfree(ch_uv->cached_notify_gru_mq_desc); |
1160 | ch_uv->cached_notify_gru_mq_desc = NULL; | |
5b8669df | 1161 | |
bd3e64c1 DN |
1162 | if (ch->flags & XPC_C_SETUP) { |
1163 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1164 | kfree(ch_uv->send_msg_slots); | |
1165 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1166 | kfree(ch_uv->recv_msg_slots); | |
1167 | } | |
5b8669df DN |
1168 | } |
1169 | ||
1170 | static void | |
1171 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1172 | { | |
1173 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; | |
1174 | ||
1175 | msg.ch_number = ch->number; | |
1176 | msg.reason = ch->reason; | |
1177 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1178 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); | |
1179 | } | |
1180 | ||
1181 | static void | |
1182 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1183 | { | |
1184 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; | |
1185 | ||
1186 | msg.ch_number = ch->number; | |
1187 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1188 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); | |
1189 | } | |
1190 | ||
1191 | static void | |
1192 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1193 | { | |
1194 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; | |
1195 | ||
1196 | msg.ch_number = ch->number; | |
bd3e64c1 | 1197 | msg.entry_size = ch->entry_size; |
5b8669df DN |
1198 | msg.local_nentries = ch->local_nentries; |
1199 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1200 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); | |
1201 | } | |
1202 | ||
1203 | static void | |
1204 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1205 | { | |
1206 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; | |
1207 | ||
1208 | msg.ch_number = ch->number; | |
1209 | msg.local_nentries = ch->local_nentries; | |
1210 | msg.remote_nentries = ch->remote_nentries; | |
6f2584f4 | 1211 | msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); |
5b8669df DN |
1212 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
1213 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); | |
1214 | } | |
1215 | ||
efdd06ed RH |
1216 | static void |
1217 | xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1218 | { | |
1219 | struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; | |
1220 | ||
1221 | msg.ch_number = ch->number; | |
1222 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1223 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); | |
1224 | } | |
1225 | ||
bd3e64c1 DN |
1226 | static void |
1227 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1228 | { | |
1229 | unsigned long irq_flags; | |
1230 | ||
1231 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1232 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1233 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1234 | ||
1235 | xpc_wakeup_channel_mgr(part); | |
1236 | } | |
1237 | ||
6f2584f4 | 1238 | static enum xp_retval |
5b8669df | 1239 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
6f2584f4 | 1240 | unsigned long gru_mq_desc_gpa) |
5b8669df | 1241 | { |
6f2584f4 JS |
1242 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
1243 | ||
1244 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); | |
1245 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, | |
1246 | gru_mq_desc_gpa); | |
5b8669df DN |
1247 | } |
1248 | ||
1249 | static void | |
1250 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1251 | { | |
1252 | struct xpc_activate_mq_msg_uv msg; | |
1253 | ||
1254 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1255 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1256 | } | |
1257 | ||
1258 | static void | |
1259 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1260 | { | |
1261 | struct xpc_activate_mq_msg_uv msg; | |
1262 | ||
1263 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1264 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1265 | } | |
1266 | ||
1267 | static void | |
1268 | xpc_assume_partition_disengaged_uv(short partid) | |
1269 | { | |
1270 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1271 | unsigned long irq_flags; | |
1272 | ||
1273 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1274 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1275 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1276 | } | |
1277 | ||
1278 | static int | |
1279 | xpc_partition_engaged_uv(short partid) | |
1280 | { | |
1281 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1282 | } | |
1283 | ||
1284 | static int | |
1285 | xpc_any_partition_engaged_uv(void) | |
1286 | { | |
1287 | struct xpc_partition_uv *part_uv; | |
1288 | short partid; | |
1289 | ||
1290 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1291 | part_uv = &xpc_partitions[partid].sn.uv; | |
1292 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1293 | return 1; | |
1294 | } | |
1295 | return 0; | |
e17d416b DN |
1296 | } |
1297 | ||
bd3e64c1 DN |
1298 | static enum xp_retval |
1299 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1300 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1301 | { | |
1302 | enum xp_retval ret; | |
1303 | struct xpc_send_msg_slot_uv *msg_slot; | |
1304 | struct xpc_fifo_entry_uv *entry; | |
1305 | ||
1306 | while (1) { | |
1307 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1308 | if (entry != NULL) | |
1309 | break; | |
1310 | ||
1311 | if (flags & XPC_NOWAIT) | |
1312 | return xpNoWait; | |
1313 | ||
1314 | ret = xpc_allocate_msg_wait(ch); | |
1315 | if (ret != xpInterrupted && ret != xpTimeout) | |
1316 | return ret; | |
1317 | } | |
1318 | ||
1319 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1320 | *address_of_msg_slot = msg_slot; | |
1321 | return xpSuccess; | |
1322 | } | |
1323 | ||
1324 | static void | |
1325 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1326 | struct xpc_send_msg_slot_uv *msg_slot) | |
1327 | { | |
1328 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1329 | ||
1330 | /* wakeup anyone waiting for a free msg slot */ | |
1331 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1332 | wake_up(&ch->msg_allocate_wq); | |
1333 | } | |
1334 | ||
1335 | static void | |
1336 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1337 | struct xpc_send_msg_slot_uv *msg_slot, | |
1338 | enum xp_retval reason) | |
1339 | { | |
1340 | xpc_notify_func func = msg_slot->func; | |
1341 | ||
1342 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1343 | ||
1344 | atomic_dec(&ch->n_to_notify); | |
1345 | ||
1346 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1347 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1348 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1349 | ||
1350 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1351 | ||
1352 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1353 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1354 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | static void | |
1359 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1360 | struct xpc_notify_mq_msg_uv *msg) | |
1361 | { | |
1362 | struct xpc_send_msg_slot_uv *msg_slot; | |
1363 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1364 | ||
1365 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1366 | ||
1367 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1368 | msg_slot->msg_slot_number += ch->local_nentries; | |
1369 | ||
1370 | if (msg_slot->func != NULL) | |
1371 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1372 | ||
1373 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1374 | } | |
1375 | ||
1376 | static void | |
1377 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1378 | struct xpc_notify_mq_msg_uv *msg) | |
1379 | { | |
1380 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1381 | struct xpc_channel *ch; | |
1382 | struct xpc_channel_uv *ch_uv; | |
1383 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1384 | unsigned long irq_flags; | |
1385 | int ch_number = msg->hdr.ch_number; | |
1386 | ||
1387 | if (unlikely(ch_number >= part->nchannels)) { | |
1388 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1389 | "channel number=0x%x in message from partid=%d\n", | |
1390 | ch_number, XPC_PARTID(part)); | |
1391 | ||
1392 | /* get hb checker to deactivate from the remote partition */ | |
1393 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1394 | if (part_uv->act_state_req == 0) | |
1395 | xpc_activate_IRQ_rcvd++; | |
1396 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1397 | part_uv->reason = xpBadChannelNumber; | |
1398 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1399 | ||
1400 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1401 | return; | |
1402 | } | |
1403 | ||
1404 | ch = &part->channels[ch_number]; | |
1405 | xpc_msgqueue_ref(ch); | |
1406 | ||
1407 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1408 | xpc_msgqueue_deref(ch); | |
1409 | return; | |
1410 | } | |
1411 | ||
1412 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1413 | if (msg->hdr.size == 0) { | |
1414 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1415 | xpc_msgqueue_deref(ch); | |
1416 | return; | |
1417 | } | |
1418 | ||
1419 | /* we're dealing with a normal message sent via the notify_mq */ | |
1420 | ch_uv = &ch->sn.uv; | |
1421 | ||
361916a9 DN |
1422 | msg_slot = ch_uv->recv_msg_slots + |
1423 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; | |
bd3e64c1 DN |
1424 | |
1425 | BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number); | |
1426 | BUG_ON(msg_slot->hdr.size != 0); | |
1427 | ||
1428 | memcpy(msg_slot, msg, msg->hdr.size); | |
1429 | ||
1430 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1431 | ||
1432 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1433 | /* | |
1434 | * If there is an existing idle kthread get it to deliver | |
1435 | * the payload, otherwise we'll have to get the channel mgr | |
1436 | * for this partition to create a kthread to do the delivery. | |
1437 | */ | |
1438 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1439 | wake_up_nr(&ch->idle_wq, 1); | |
1440 | else | |
1441 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1442 | } | |
1443 | xpc_msgqueue_deref(ch); | |
1444 | } | |
1445 | ||
1446 | static irqreturn_t | |
1447 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1448 | { | |
1449 | struct xpc_notify_mq_msg_uv *msg; | |
1450 | short partid; | |
1451 | struct xpc_partition *part; | |
1452 | ||
6f2584f4 JS |
1453 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
1454 | NULL) { | |
bd3e64c1 DN |
1455 | |
1456 | partid = msg->hdr.partid; | |
1457 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1458 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1459 | "invalid partid=0x%x in message\n", partid); | |
1460 | } else { | |
1461 | part = &xpc_partitions[partid]; | |
1462 | ||
1463 | if (xpc_part_ref(part)) { | |
1464 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1465 | xpc_part_deref(part); | |
1466 | } | |
1467 | } | |
1468 | ||
6f2584f4 | 1469 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
bd3e64c1 DN |
1470 | } |
1471 | ||
1472 | return IRQ_HANDLED; | |
1473 | } | |
1474 | ||
1475 | static int | |
1476 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1477 | { | |
1478 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1479 | } | |
1480 | ||
1481 | static void | |
1482 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1483 | { | |
1484 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1485 | int ndeliverable_payloads; | |
1486 | ||
1487 | xpc_msgqueue_ref(ch); | |
1488 | ||
1489 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1490 | ||
1491 | if (ndeliverable_payloads > 0 && | |
1492 | (ch->flags & XPC_C_CONNECTED) && | |
1493 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1494 | ||
1495 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1496 | } | |
1497 | ||
1498 | xpc_msgqueue_deref(ch); | |
1499 | } | |
1500 | ||
1501 | static enum xp_retval | |
1502 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1503 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1504 | void *key) | |
1505 | { | |
1506 | enum xp_retval ret = xpSuccess; | |
1507 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1508 | struct xpc_notify_mq_msg_uv *msg; | |
1509 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1510 | size_t msg_size; | |
1511 | ||
1512 | DBUG_ON(notify_type != XPC_N_CALL); | |
1513 | ||
1514 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1515 | if (msg_size > ch->entry_size) | |
1516 | return xpPayloadTooBig; | |
1517 | ||
1518 | xpc_msgqueue_ref(ch); | |
1519 | ||
1520 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1521 | ret = ch->reason; | |
1522 | goto out_1; | |
1523 | } | |
1524 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1525 | ret = xpNotConnected; | |
1526 | goto out_1; | |
1527 | } | |
1528 | ||
1529 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1530 | if (ret != xpSuccess) | |
1531 | goto out_1; | |
1532 | ||
1533 | if (func != NULL) { | |
1534 | atomic_inc(&ch->n_to_notify); | |
1535 | ||
1536 | msg_slot->key = key; | |
69b3bb65 | 1537 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
bd3e64c1 DN |
1538 | msg_slot->func = func; |
1539 | ||
1540 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1541 | ret = ch->reason; | |
1542 | goto out_2; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1547 | msg->hdr.partid = xp_partition_id; | |
1548 | msg->hdr.ch_number = ch->number; | |
1549 | msg->hdr.size = msg_size; | |
1550 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1551 | memcpy(&msg->payload, payload, payload_size); | |
1552 | ||
6f2584f4 JS |
1553 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
1554 | msg_size); | |
bd3e64c1 DN |
1555 | if (ret == xpSuccess) |
1556 | goto out_1; | |
1557 | ||
1558 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1559 | out_2: | |
1560 | if (func != NULL) { | |
1561 | /* | |
1562 | * Try to NULL the msg_slot's func field. If we fail, then | |
1563 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1564 | * case we need to pretend we succeeded to send the message | |
1565 | * since the user will get a callout for the disconnect error | |
1566 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1567 | * error returned here will confuse them. Additionally, since | |
1568 | * in this case the channel is being disconnected we don't need | |
1569 | * to put the the msg_slot back on the free list. | |
1570 | */ | |
1571 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1572 | ret = xpSuccess; | |
1573 | goto out_1; | |
1574 | } | |
1575 | ||
1576 | msg_slot->key = NULL; | |
1577 | atomic_dec(&ch->n_to_notify); | |
1578 | } | |
1579 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1580 | out_1: | |
1581 | xpc_msgqueue_deref(ch); | |
1582 | return ret; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1587 | * is unknown because the channel is now disconnecting. | |
1588 | * | |
1589 | * We don't worry about putting these msg_slots on the free list since the | |
1590 | * msg_slots themselves are about to be kfree'd. | |
1591 | */ | |
1592 | static void | |
1593 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1594 | { | |
1595 | struct xpc_send_msg_slot_uv *msg_slot; | |
1596 | int entry; | |
1597 | ||
1598 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1599 | ||
1600 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1601 | ||
1602 | if (atomic_read(&ch->n_to_notify) == 0) | |
1603 | break; | |
1604 | ||
1605 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1606 | if (msg_slot->func != NULL) | |
1607 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * Get the next deliverable message's payload. | |
1613 | */ | |
1614 | static void * | |
1615 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1616 | { | |
1617 | struct xpc_fifo_entry_uv *entry; | |
1618 | struct xpc_notify_mq_msg_uv *msg; | |
1619 | void *payload = NULL; | |
1620 | ||
1621 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1622 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1623 | if (entry != NULL) { | |
1624 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1625 | hdr.u.next); | |
1626 | payload = &msg->payload; | |
1627 | } | |
1628 | } | |
1629 | return payload; | |
1630 | } | |
1631 | ||
1632 | static void | |
1633 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1634 | { |
bd3e64c1 DN |
1635 | struct xpc_notify_mq_msg_uv *msg; |
1636 | enum xp_retval ret; | |
1637 | ||
1638 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1639 | ||
1640 | /* return an ACK to the sender of this message */ | |
1641 | ||
1642 | msg->hdr.partid = xp_partition_id; | |
1643 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1644 | ||
6f2584f4 | 1645 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
bd3e64c1 DN |
1646 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
1647 | if (ret != xpSuccess) | |
1648 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1649 | ||
1650 | msg->hdr.msg_slot_number += ch->remote_nentries; | |
e17d416b DN |
1651 | } |
1652 | ||
a7665b0a RH |
1653 | static struct xpc_arch_operations xpc_arch_ops_uv = { |
1654 | .setup_partitions = xpc_setup_partitions_uv, | |
1655 | .teardown_partitions = xpc_teardown_partitions_uv, | |
1656 | .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, | |
1657 | .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, | |
1658 | .setup_rsvd_page = xpc_setup_rsvd_page_uv, | |
1659 | ||
1660 | .allow_hb = xpc_allow_hb_uv, | |
1661 | .disallow_hb = xpc_disallow_hb_uv, | |
1662 | .disallow_all_hbs = xpc_disallow_all_hbs_uv, | |
1663 | .increment_heartbeat = xpc_increment_heartbeat_uv, | |
1664 | .offline_heartbeat = xpc_offline_heartbeat_uv, | |
1665 | .online_heartbeat = xpc_online_heartbeat_uv, | |
1666 | .heartbeat_init = xpc_heartbeat_init_uv, | |
1667 | .heartbeat_exit = xpc_heartbeat_exit_uv, | |
1668 | .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, | |
1669 | ||
1670 | .request_partition_activation = | |
1671 | xpc_request_partition_activation_uv, | |
1672 | .request_partition_reactivation = | |
1673 | xpc_request_partition_reactivation_uv, | |
1674 | .request_partition_deactivation = | |
1675 | xpc_request_partition_deactivation_uv, | |
1676 | .cancel_partition_deactivation_request = | |
1677 | xpc_cancel_partition_deactivation_request_uv, | |
1678 | ||
1679 | .setup_ch_structures = xpc_setup_ch_structures_uv, | |
1680 | .teardown_ch_structures = xpc_teardown_ch_structures_uv, | |
1681 | ||
1682 | .make_first_contact = xpc_make_first_contact_uv, | |
1683 | ||
1684 | .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, | |
1685 | .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, | |
1686 | .send_chctl_closereply = xpc_send_chctl_closereply_uv, | |
1687 | .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, | |
1688 | .send_chctl_openreply = xpc_send_chctl_openreply_uv, | |
1689 | .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, | |
1690 | .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, | |
1691 | ||
1692 | .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, | |
1693 | ||
1694 | .setup_msg_structures = xpc_setup_msg_structures_uv, | |
1695 | .teardown_msg_structures = xpc_teardown_msg_structures_uv, | |
1696 | ||
1697 | .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, | |
1698 | .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, | |
1699 | .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, | |
1700 | .partition_engaged = xpc_partition_engaged_uv, | |
1701 | .any_partition_engaged = xpc_any_partition_engaged_uv, | |
1702 | ||
1703 | .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, | |
1704 | .send_payload = xpc_send_payload_uv, | |
1705 | .get_deliverable_payload = xpc_get_deliverable_payload_uv, | |
1706 | .received_payload = xpc_received_payload_uv, | |
1707 | .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, | |
1708 | }; | |
1709 | ||
5b8669df | 1710 | int |
94bd2708 DN |
1711 | xpc_init_uv(void) |
1712 | { | |
a7665b0a | 1713 | xpc_arch_ops = xpc_arch_ops_uv; |
bd3e64c1 DN |
1714 | |
1715 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1716 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1717 | XPC_MSG_HDR_MAX_SIZE); | |
1718 | return -E2BIG; | |
1719 | } | |
5b8669df | 1720 | |
2525789b DN |
1721 | xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, |
1722 | XPC_ACTIVATE_IRQ_NAME, | |
5b8669df | 1723 | xpc_handle_activate_IRQ_uv); |
2525789b DN |
1724 | if (IS_ERR(xpc_activate_mq_uv)) |
1725 | return PTR_ERR(xpc_activate_mq_uv); | |
5b8669df | 1726 | |
2525789b DN |
1727 | xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, |
1728 | XPC_NOTIFY_IRQ_NAME, | |
bd3e64c1 | 1729 | xpc_handle_notify_IRQ_uv); |
2525789b DN |
1730 | if (IS_ERR(xpc_notify_mq_uv)) { |
1731 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1732 | return PTR_ERR(xpc_notify_mq_uv); | |
bd3e64c1 DN |
1733 | } |
1734 | ||
5b8669df | 1735 | return 0; |
94bd2708 DN |
1736 | } |
1737 | ||
1738 | void | |
1739 | xpc_exit_uv(void) | |
1740 | { | |
2525789b DN |
1741 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1742 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1743 | } |