Commit | Line | Data |
---|---|---|
800f879a AT |
1 | /* |
2 | * Copyright 2010-2017 Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License, version 2, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * Disclaimer: The codes contained in these modules may be specific to | |
14 | * the Intel Software Development Platform codenamed Knights Ferry, | |
15 | * and the Intel product codenamed Knights Corner, and are not backward | |
16 | * compatible with other Intel products. Additionally, Intel will NOT | |
17 | * support the codes or instruction set in future products. | |
18 | * | |
19 | * Intel offers no warranty of any kind regarding the code. This code is | |
20 | * licensed on an "AS IS" basis and Intel is not obligated to provide | |
21 | * any support, assistance, installation, training, or other services | |
22 | * of any kind. Intel is also not obligated to provide any updates, | |
23 | * enhancements or extensions. Intel specifically disclaims any warranty | |
24 | * of merchantability, non-infringement, fitness for any particular | |
25 | * purpose, and any other warranty. | |
26 | * | |
27 | * Further, Intel disclaims all liability of any kind, including but | |
28 | * not limited to liability for infringement of any proprietary rights, | |
29 | * relating to the use of the code, even if Intel is notified of the | |
30 | * possibility of such liability. Except as expressly stated in an Intel | |
31 | * license agreement provided with this code and agreed upon with Intel, | |
32 | * no license, express or implied, by estoppel or otherwise, to any | |
33 | * intellectual property rights is granted herein. | |
34 | */ | |
35 | ||
36 | #include "mic/micscif.h" | |
37 | #include "mic/micscif_smpt.h" | |
38 | #include "mic/micscif_nodeqp.h" | |
39 | #include "mic/micscif_intr.h" | |
40 | #include "mic/micscif_nm.h" | |
41 | #include "mic_common.h" | |
42 | #include "mic/micscif_map.h" | |
43 | ||
44 | #define SBOX_MMIO_LENGTH 0x10000 | |
45 | /* FIXME: HW spefic, define someplace else */ | |
46 | /* SBOX Offset in MMIO space */ | |
47 | #define SBOX_OFFSET 0x10000 | |
48 | ||
49 | #ifdef ENABLE_TEST | |
50 | static void micscif_qp_testboth(struct micscif_dev *scifdev); | |
51 | #endif | |
52 | ||
53 | bool mic_p2p_enable = 1; | |
54 | bool mic_p2p_proxy_enable = 1; | |
55 | ||
56 | void micscif_teardown_ep(void *endpt) | |
57 | { | |
58 | struct endpt *ep = (struct endpt *)endpt; | |
59 | struct micscif_qp *qp = ep->qp_info.qp; | |
60 | if (qp) { | |
61 | if (qp->outbound_q.rb_base) | |
62 | scif_iounmap((void *)qp->outbound_q.rb_base, | |
63 | qp->outbound_q.size, ep->remote_dev); | |
64 | if (qp->remote_qp) | |
65 | scif_iounmap((void *)qp->remote_qp, | |
66 | sizeof(struct micscif_qp), ep->remote_dev); | |
67 | if (qp->local_buf) { | |
68 | unmap_from_aperture( | |
69 | qp->local_buf, | |
70 | ep->remote_dev, ENDPT_QP_SIZE); | |
71 | } | |
72 | if (qp->local_qp) { | |
73 | unmap_from_aperture(qp->local_qp, ep->remote_dev, | |
74 | sizeof(struct micscif_qp)); | |
75 | } | |
76 | if (qp->inbound_q.rb_base) | |
77 | kfree((void *)qp->inbound_q.rb_base); | |
78 | kfree(qp); | |
79 | #ifdef _MIC_SCIF_ | |
80 | micscif_teardown_proxy_dma(endpt); | |
81 | #endif | |
82 | WARN_ON(!list_empty(&ep->rma_info.task_list)); | |
83 | } | |
84 | } | |
85 | ||
86 | /* | |
87 | * Enqueue the endpoint to the zombie list for cleanup. | |
88 | * The endpoint should not be accessed once this API returns. | |
89 | */ | |
90 | void micscif_add_epd_to_zombie_list(struct endpt *ep, bool mi_eplock_held) | |
91 | { | |
92 | unsigned long sflags = 0; | |
93 | ||
94 | /* | |
95 | * It is an error to call scif_close() on an endpoint on which a | |
96 | * scif_range structure of that endpoint has not been returned | |
97 | * after a call to scif_get_pages() via scif_put_pages(). | |
98 | */ | |
99 | if (SCIFEP_CLOSING == ep->state || | |
100 | SCIFEP_CLOSED == ep->state || | |
101 | SCIFEP_DISCONNECTED == ep->state) | |
102 | BUG_ON(micscif_rma_list_get_pages_check(ep)); | |
103 | ||
104 | if (list_empty(&ep->rma_info.task_list) && ep->remote_dev) | |
105 | wake_up(&ep->remote_dev->sd_mmap_wq); | |
106 | if (!mi_eplock_held) | |
107 | spin_lock_irqsave(&ms_info.mi_eplock, sflags); | |
108 | spin_lock(&ep->lock); | |
109 | ep->state = SCIFEP_ZOMBIE; | |
110 | spin_unlock(&ep->lock); | |
111 | list_add_tail(&ep->list, &ms_info.mi_zombie); | |
112 | ms_info.mi_nr_zombies++; | |
113 | if (!mi_eplock_held) | |
114 | spin_unlock_irqrestore(&ms_info.mi_eplock, sflags); | |
115 | queue_work(ms_info.mi_misc_wq, &ms_info.mi_misc_work); | |
116 | } | |
117 | ||
118 | /* Initializes "local" data structures for the QP | |
119 | * | |
120 | * Allocates the QP ring buffer (rb), initializes the "in bound" queue | |
121 | * For the host generate bus addresses for QP rb & qp, in the card's case | |
122 | * map these into the pci aperture | |
123 | */ | |
124 | int micscif_setup_qp_connect(struct micscif_qp *qp, dma_addr_t *qp_offset, | |
125 | int local_size, struct micscif_dev *scifdev) | |
126 | { | |
127 | void *local_q = NULL; | |
128 | int err = 0; | |
129 | volatile uint32_t tmp_rd; | |
130 | ||
131 | spin_lock_init(&qp->qp_send_lock); | |
132 | spin_lock_init(&qp->qp_recv_lock); | |
133 | ||
134 | if (!qp->inbound_q.rb_base) { | |
135 | /* we need to allocate the local buffer for the incoming queue */ | |
136 | local_q = kzalloc(local_size, GFP_ATOMIC); | |
137 | if (!local_q) { | |
138 | printk(KERN_ERR "Ring Buffer Allocation Failed\n"); | |
139 | err = -ENOMEM; | |
140 | return err; | |
141 | } | |
142 | /* to setup the inbound_q, the buffer lives locally (local_q), | |
143 | * the read pointer is remote (in remote_qp's local_read) | |
144 | * the write pointer is local (in local_write) | |
145 | */ | |
146 | tmp_rd = 0; | |
147 | micscif_rb_init(&qp->inbound_q, | |
148 | &tmp_rd, /* No read ptr right now ... */ | |
149 | &(scifdev->qpairs[0].local_write), | |
150 | (volatile void *) local_q, | |
151 | local_size); | |
152 | qp->inbound_q.read_ptr = NULL; /* it is unsafe to use the ring buffer until this changes! */ | |
153 | } | |
154 | ||
155 | if (!qp->local_buf) { | |
156 | err = map_virt_into_aperture(&qp->local_buf, local_q, scifdev, local_size); | |
157 | if (err) { | |
158 | printk(KERN_ERR "%s %d error %d\n", | |
159 | __func__, __LINE__, err); | |
160 | return err; | |
161 | } | |
162 | } | |
163 | ||
164 | if (!qp->local_qp) { | |
165 | err = map_virt_into_aperture(qp_offset, qp, scifdev, sizeof(struct micscif_qp)); | |
166 | if (err) { | |
167 | printk(KERN_ERR "%s %d error %d\n", | |
168 | __func__, __LINE__, err); | |
169 | return err; | |
170 | } | |
171 | qp->local_qp = *qp_offset; | |
172 | } else { | |
173 | *qp_offset = qp->local_qp; | |
174 | } | |
175 | return err; | |
176 | } | |
177 | ||
178 | /* When the other side has already done it's allocation, this is called */ | |
179 | /* TODO: Replace reads that go across the bus somehow ... */ | |
180 | int micscif_setup_qp_accept(struct micscif_qp *qp, dma_addr_t *qp_offset, dma_addr_t phys, int local_size, struct micscif_dev *scifdev) | |
181 | { | |
182 | void *local_q; | |
183 | volatile void *remote_q; | |
184 | struct micscif_qp *remote_qp; | |
185 | int remote_size; | |
186 | int err = 0; | |
187 | ||
188 | spin_lock_init(&qp->qp_send_lock); | |
189 | spin_lock_init(&qp->qp_recv_lock); | |
190 | /* Start by figuring out where we need to point */ | |
191 | remote_qp = scif_ioremap(phys, sizeof(struct micscif_qp), scifdev); | |
192 | qp->remote_qp = remote_qp; | |
193 | qp->remote_buf = remote_qp->local_buf; | |
194 | /* To setup the outbound_q, the buffer lives in remote memory (at scifdev->bs->buf phys), | |
195 | * the read pointer is local (in local's local_read) | |
196 | * the write pointer is remote (In remote_qp's local_write) | |
197 | */ | |
198 | remote_size = qp->remote_qp->inbound_q.size; /* TODO: Remove this read for p2p */ | |
199 | remote_q = scif_ioremap(qp->remote_buf, remote_size, scifdev); | |
200 | ||
201 | BUG_ON(qp->remote_qp->magic != SCIFEP_MAGIC); | |
202 | ||
203 | qp->remote_qp->local_write = 0; | |
204 | micscif_rb_init(&(qp->outbound_q), | |
205 | &(qp->local_read), /*read ptr*/ | |
206 | &(qp->remote_qp->local_write), /*write ptr*/ | |
207 | remote_q, /*rb_base*/ | |
208 | remote_size); | |
209 | /* to setup the inbound_q, the buffer lives locally (local_q), | |
210 | * the read pointer is remote (in remote_qp's local_read) | |
211 | * the write pointer is local (in local_write) | |
212 | */ | |
213 | local_q = kzalloc(local_size, GFP_KERNEL); | |
214 | if (!local_q) { | |
215 | printk(KERN_ERR "Ring Buffer Allocation Failed\n"); | |
216 | err = -ENOMEM; | |
217 | return err; | |
218 | } | |
219 | ||
220 | qp->remote_qp->local_read = 0; | |
221 | micscif_rb_init(&(qp->inbound_q), | |
222 | &(qp->remote_qp->local_read), | |
223 | &(qp->local_write), | |
224 | local_q, | |
225 | local_size); | |
226 | err = map_virt_into_aperture(&qp->local_buf, local_q, scifdev, local_size); | |
227 | if (err) { | |
228 | printk(KERN_ERR "%s %d error %d\n", | |
229 | __func__, __LINE__, err); | |
230 | return err; | |
231 | } | |
232 | err = map_virt_into_aperture(qp_offset, qp, scifdev, sizeof(struct micscif_qp)); | |
233 | if (err) { | |
234 | printk(KERN_ERR "%s %d error %d\n", | |
235 | __func__, __LINE__, err); | |
236 | return err; | |
237 | } | |
238 | qp->local_qp = *qp_offset; | |
239 | return err; | |
240 | } | |
241 | ||
242 | int micscif_setup_qp_connect_response(struct micscif_dev *scifdev, struct micscif_qp *qp, uint64_t payload) | |
243 | { | |
244 | int err = 0; | |
245 | void *r_buf; | |
246 | int remote_size; | |
247 | phys_addr_t tmp_phys; | |
248 | ||
249 | qp->remote_qp = scif_ioremap(payload, sizeof(struct micscif_qp), scifdev); | |
250 | ||
251 | if (!qp->remote_qp) { | |
252 | err = -ENOMEM; | |
253 | goto error; | |
254 | } | |
255 | ||
256 | if (qp->remote_qp->magic != SCIFEP_MAGIC) { | |
257 | printk(KERN_ERR "SCIFEP_MAGIC doesnot match between node %d " | |
258 | "(self) and %d (remote)\n", scif_dev[ms_info.mi_nodeid].sd_node, | |
259 | scifdev->sd_node); | |
260 | WARN_ON(1); | |
261 | err = -ENODEV; | |
262 | goto error; | |
263 | } | |
264 | ||
265 | tmp_phys = readq(&(qp->remote_qp->local_buf)); | |
266 | remote_size = readl(&qp->remote_qp->inbound_q.size); | |
267 | r_buf = scif_ioremap(tmp_phys, remote_size, scifdev); | |
268 | ||
269 | #if 0 | |
270 | pr_debug("payload = 0x%llx remote_qp = 0x%p tmp_phys=0x%llx \ | |
271 | remote_size=%d r_buf=%p\n", payload, qp->remote_qp, | |
272 | tmp_phys, remote_size, r_buf); | |
273 | #endif | |
274 | ||
275 | micscif_rb_init(&(qp->outbound_q), | |
276 | &(qp->local_read), | |
277 | &(qp->remote_qp->local_write), | |
278 | r_buf, | |
279 | remote_size); | |
280 | /* resetup the inbound_q now that we know where the inbound_read really is */ | |
281 | micscif_rb_init(&(qp->inbound_q), | |
282 | &(qp->remote_qp->local_read), | |
283 | &(qp->local_write), | |
284 | qp->inbound_q.rb_base, | |
285 | qp->inbound_q.size); | |
286 | error: | |
287 | return err; | |
288 | } | |
289 | ||
290 | #ifdef _MIC_SCIF_ | |
291 | extern int micscif_send_host_intr(struct micscif_dev *, uint32_t); | |
292 | ||
293 | int micscif_send_host_intr(struct micscif_dev *dev, uint32_t doorbell) | |
294 | { | |
295 | uint32_t db_reg; | |
296 | ||
297 | if (doorbell > 3) | |
298 | return -EINVAL; | |
299 | ||
300 | db_reg = readl(dev->mm_sbox + | |
301 | (SBOX_SDBIC0 + (4 * doorbell))) | SBOX_SDBIC0_DBREQ_BIT; | |
302 | writel(db_reg, dev->mm_sbox + (SBOX_SDBIC0 + (4 * doorbell))); | |
303 | return 0; | |
304 | } | |
305 | #endif | |
306 | ||
307 | /* | |
308 | * Interrupts remote mic | |
309 | */ | |
310 | static void | |
311 | micscif_send_mic_intr(struct micscif_dev *dev) | |
312 | { | |
313 | /* Writes to RDMASR triggers the interrupt */ | |
314 | writel(0, (uint8_t *)dev->mm_sbox + dev->sd_rdmasr); | |
315 | } | |
316 | ||
317 | /* scifdev - remote scif device | |
318 | * also needs the local scif device so that we can decide which RMASR | |
319 | * to target on the remote mic | |
320 | */ | |
321 | static __always_inline void | |
322 | scif_send_msg_intr(struct micscif_dev *scifdev) | |
323 | { | |
324 | #ifdef _MIC_SCIF_ | |
325 | if (scifdev == &scif_dev[0]) | |
326 | micscif_send_host_intr(scifdev, 0); | |
327 | else | |
328 | #endif | |
329 | micscif_send_mic_intr(scifdev); | |
330 | } | |
331 | ||
332 | #ifdef _MIC_SCIF_ | |
333 | int micscif_setup_card_qp(phys_addr_t host_phys, struct micscif_dev *scifdev) | |
334 | { | |
335 | int local_size; | |
336 | dma_addr_t qp_offset; | |
337 | int err = 0; | |
338 | struct nodemsg tmp_msg; | |
339 | uint16_t host_scif_ver; | |
340 | ||
341 | pr_debug("Got 0x%llx from the host\n", host_phys); | |
342 | ||
343 | local_size = NODE_QP_SIZE; | |
344 | ||
345 | /* FIXME: n_qpairs is always 1 OK to get rid of it ? */ | |
346 | scifdev->n_qpairs = 1; | |
347 | scifdev->qpairs = kzalloc(sizeof(struct micscif_qp), GFP_KERNEL); | |
348 | if (!scifdev->qpairs) { | |
349 | printk(KERN_ERR "Node QP Allocation failed\n"); | |
350 | err = -ENOMEM; | |
351 | return err; | |
352 | } | |
353 | ||
354 | scifdev->qpairs->magic = SCIFEP_MAGIC; | |
355 | pr_debug("micscif_card(): called qp_accept\n"); | |
356 | err = micscif_setup_qp_accept(&scifdev->qpairs[0], &qp_offset, host_phys, local_size, scifdev); | |
357 | ||
358 | if (!err) { | |
359 | host_scif_ver = readw(&(&scifdev->qpairs[0])->remote_qp->scif_version); | |
360 | if (host_scif_ver != SCIF_VERSION) { | |
361 | printk(KERN_ERR "Card and host SCIF versions do not match. \n"); | |
362 | printk(KERN_ERR "Card version: %u, Host version: %u \n", | |
363 | SCIF_VERSION, host_scif_ver); | |
364 | err = -ENXIO; | |
365 | goto error_exit; | |
366 | } | |
367 | /* now that everything is setup and mapped, we're ready to tell the | |
368 | * host where our queue's location | |
369 | */ | |
370 | tmp_msg.uop = SCIF_INIT; | |
371 | tmp_msg.payload[0] = qp_offset; | |
372 | tmp_msg.payload[1] = get_rdmasr_offset(scifdev->sd_intr_handle); | |
373 | tmp_msg.dst.node = 0; /* host */ | |
374 | ||
375 | pr_debug("micscif_setup_card_qp: micscif_setup_qp_accept, INIT message\n"); | |
376 | err = micscif_nodeqp_send(scifdev, &tmp_msg, NULL); | |
377 | } | |
378 | error_exit: | |
379 | if (err) | |
380 | printk(KERN_ERR "%s %d error %d\n", | |
381 | __func__, __LINE__, err); | |
382 | return err; | |
383 | } | |
384 | ||
385 | ||
386 | void micscif_send_exit(void) | |
387 | { | |
388 | struct nodemsg msg; | |
389 | struct micscif_dev *scifdev = &scif_dev[SCIF_HOST_NODE]; | |
390 | ||
391 | init_waitqueue_head(&ms_info.mi_exitwq); | |
392 | ||
393 | msg.uop = SCIF_EXIT; | |
394 | msg.src.node = ms_info.mi_nodeid; | |
395 | msg.dst.node = scifdev->sd_node; | |
396 | /* No error handling for Host SCIF device */ | |
397 | micscif_nodeqp_send(scifdev, &msg, NULL); | |
398 | } | |
399 | ||
400 | #else /* !_MIC_SCIF_ */ | |
401 | static uint32_t tmp_r_ptr; | |
402 | int micscif_setup_host_qp(mic_ctx_t *mic_ctx, struct micscif_dev *scifdev) | |
403 | { | |
404 | int err = 0; | |
405 | int local_size; | |
406 | ||
407 | /* Bail out if the node QP is already setup */ | |
408 | if (scifdev->qpairs) | |
409 | return err; | |
410 | ||
411 | local_size = NODE_QP_SIZE; | |
412 | ||
413 | /* for now, assume that we only have one queue-pair -- with the host */ | |
414 | scifdev->n_qpairs = 1; | |
415 | scifdev->qpairs = (struct micscif_qp *)kzalloc(sizeof(struct micscif_qp), GFP_ATOMIC); | |
416 | if (!scifdev->qpairs) { | |
417 | printk(KERN_ERR "Node QP Allocation failed\n"); | |
418 | err = -ENOMEM; | |
419 | return err; | |
420 | } | |
421 | ||
422 | scifdev->qpairs->magic = SCIFEP_MAGIC; | |
423 | scifdev->qpairs->scif_version = SCIF_VERSION; | |
424 | err = micscif_setup_qp_connect(&scifdev->qpairs[0], &(mic_ctx->bi_scif.si_pa), local_size, scifdev); | |
425 | /* fake the read pointer setup so we can use the inbound q */ | |
426 | scifdev->qpairs[0].inbound_q.read_ptr = &tmp_r_ptr; | |
427 | ||
428 | /* We're as setup as we can be ... the inbound_q is setup, w/o | |
429 | * a usable outbound q. When we get a message, the read_ptr will | |
430 | * be updated, so we know there's something here. When that happens, | |
431 | * we finish the setup (just point the write pointer to the real | |
432 | * write pointer that lives on the card), and pull the message off | |
433 | * the card. | |
434 | * Tell the card where we are. | |
435 | */ | |
436 | printk("My Phys addrs: 0x%llx and scif_addr 0x%llx\n", scifdev->qpairs[0].local_buf, | |
437 | mic_ctx->bi_scif.si_pa); | |
438 | ||
439 | if (err) printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
440 | return err; | |
441 | } | |
442 | ||
443 | ||
444 | /* FIXME: add to header */ | |
445 | struct scatterlist * micscif_p2p_mapsg(void *va, int page_size, int page_cnt); | |
446 | void micscif_p2p_freesg(struct scatterlist *); | |
447 | mic_ctx_t* get_per_dev_ctx(uint16_t node); | |
448 | ||
449 | /* Init p2p mappings required to access peerdev from scifdev */ | |
450 | static struct scif_p2p_info * | |
451 | init_p2p_info(struct micscif_dev *scifdev, struct micscif_dev *peerdev) | |
452 | { | |
453 | struct _mic_ctx_t *mic_ctx_peer; | |
454 | struct _mic_ctx_t *mic_ctx; | |
455 | struct scif_p2p_info *p2p; | |
456 | int num_mmio_pages; | |
457 | int num_aper_pages; | |
458 | ||
459 | mic_ctx = get_per_dev_ctx(scifdev->sd_node - 1); | |
460 | mic_ctx_peer = get_per_dev_ctx(peerdev->sd_node - 1); | |
461 | ||
462 | num_mmio_pages = (int) (mic_ctx_peer->mmio.len >> PAGE_SHIFT); | |
463 | num_aper_pages = (int) (mic_ctx_peer->aper.len >> PAGE_SHIFT); | |
464 | ||
465 | // First map the peer board addresses into the new board | |
466 | p2p = kzalloc(sizeof(struct scif_p2p_info), GFP_KERNEL); | |
467 | ||
468 | if (p2p){ | |
469 | int sg_page_shift = get_order(min(mic_ctx_peer->aper.len,(uint64_t)(1 << 30))); | |
470 | /* FIXME: check return codes below */ | |
471 | p2p->ppi_sg[PPI_MMIO] = micscif_p2p_mapsg(mic_ctx_peer->mmio.va, PAGE_SIZE, | |
472 | num_mmio_pages); | |
473 | p2p->sg_nentries[PPI_MMIO] = num_mmio_pages; | |
474 | p2p->ppi_sg[PPI_APER] = micscif_p2p_mapsg(mic_ctx_peer->aper.va, 1 << sg_page_shift, | |
475 | num_aper_pages >> (sg_page_shift - PAGE_SHIFT)); | |
476 | p2p->sg_nentries[PPI_APER] = num_aper_pages >> (sg_page_shift - PAGE_SHIFT); | |
477 | ||
478 | pci_map_sg(mic_ctx->bi_pdev, p2p->ppi_sg[PPI_MMIO], num_mmio_pages, PCI_DMA_BIDIRECTIONAL); | |
479 | pci_map_sg(mic_ctx->bi_pdev, p2p->ppi_sg[PPI_APER], | |
480 | num_aper_pages >> (sg_page_shift - PAGE_SHIFT), PCI_DMA_BIDIRECTIONAL); | |
481 | ||
482 | p2p->ppi_pa[PPI_MMIO] = sg_dma_address(p2p->ppi_sg[PPI_MMIO]); | |
483 | p2p->ppi_pa[PPI_APER] = sg_dma_address(p2p->ppi_sg[PPI_APER]); | |
484 | p2p->ppi_len[PPI_MMIO] = num_mmio_pages; | |
485 | p2p->ppi_len[PPI_APER] = num_aper_pages; | |
486 | p2p->ppi_disc_state = SCIFDEV_RUNNING; | |
487 | p2p->ppi_peer_id = peerdev->sd_node; | |
488 | ||
489 | } | |
490 | return (p2p); | |
491 | } | |
492 | ||
493 | ||
494 | int micscif_setuphost_response(struct micscif_dev *scifdev, uint64_t payload) | |
495 | { | |
496 | int read_size; | |
497 | struct nodemsg msg; | |
498 | int err = 0; | |
499 | ||
500 | pr_debug("micscif_setuphost_response: scif node %d\n", scifdev->sd_node); | |
501 | err = micscif_setup_qp_connect_response(scifdev, &scifdev->qpairs[0], payload); | |
502 | if (err) { | |
503 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
504 | return err; | |
505 | } | |
506 | /* re-recieve the bootstrap message after re-init call */ | |
507 | pr_debug("micscif_host(): reading INIT message after re-init call\n"); | |
508 | read_size = micscif_rb_get_next(&(scifdev->qpairs[0].inbound_q), &msg, | |
509 | sizeof(struct nodemsg)); | |
510 | micscif_rb_update_read_ptr(&(scifdev->qpairs[0].inbound_q)); | |
511 | ||
512 | scifdev->sd_rdmasr = (uint32_t)msg.payload[1]; | |
513 | ||
514 | /* for testing, send a message back to the card */ | |
515 | msg.uop = SCIF_INIT; | |
516 | msg.payload[0] = 0xdeadbeef; | |
517 | msg.dst.node = scifdev->sd_node; /* card */ | |
518 | if ((err = micscif_nodeqp_send(scifdev, &msg, NULL))) { | |
519 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
520 | return err; | |
521 | } | |
522 | ||
523 | #ifdef ENABLE_TEST | |
524 | /* Launch the micscif_rb test */ | |
525 | pr_debug("micscif_host(): starting TEST\n"); | |
526 | micscif_qp_testboth(scifdev); | |
527 | #endif | |
528 | ||
529 | /* | |
530 | * micscif_nodeqp_intrhandler(..) increments the ref_count before calling | |
531 | * this API hence clamp the scif_ref_cnt to 1. This is required to | |
532 | * handle the SCIF module load/unload case on MIC. The SCIF_EXIT message | |
533 | * keeps the ref_cnt clamped to SCIF_NODE_IDLE during module unload. | |
534 | * Setting the ref_cnt to 1 during SCIF_INIT ensures that the ref_cnt | |
535 | * returns back to 0 once SCIF module load completes. | |
536 | */ | |
537 | #ifdef SCIF_ENABLE_PM | |
538 | scifdev->scif_ref_cnt = (atomic_long_t) ATOMIC_LONG_INIT(1); | |
539 | #endif | |
540 | mutex_lock(&ms_info.mi_conflock); | |
541 | ms_info.mi_mask |= 0x1 << scifdev->sd_node; | |
542 | ms_info.mi_maxid = SCIF_MAX(scifdev->sd_node, ms_info.mi_maxid); | |
543 | ms_info.mi_total++; | |
544 | scifdev->sd_state = SCIFDEV_RUNNING; | |
545 | mutex_unlock(&ms_info.mi_conflock); | |
546 | ||
547 | micscif_node_add_callback(scifdev->sd_node); | |
548 | return err; | |
549 | } | |
550 | ||
551 | void | |
552 | micscif_removehost_respose(struct micscif_dev *scifdev, struct nodemsg *msg) | |
553 | { | |
554 | mic_ctx_t *mic_ctx = get_per_dev_ctx(scifdev->sd_node -1); | |
555 | int err; | |
556 | ||
557 | if (scifdev->sd_state != SCIFDEV_RUNNING) | |
558 | return; | |
559 | ||
560 | micscif_stop(mic_ctx); | |
561 | ||
562 | if ((err = micscif_nodeqp_send(scifdev, msg, NULL))) | |
563 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
564 | ||
565 | scifdev->sd_state = SCIFDEV_INIT; | |
566 | } | |
567 | #endif | |
568 | ||
569 | /* TODO: Fix the non-symmetric use of micscif_dev on the host and the card. Right | |
570 | * now, the card's data structures are shaping up such that there is a single | |
571 | * micscif_dev structure with multiple qp's. The host ends up with multiple | |
572 | * micscif_devs (one per card). We should unify the way this will work. | |
573 | */ | |
574 | static struct micscif_qp *micscif_nodeqp_find(struct micscif_dev *scifdev, uint8_t node) | |
575 | { | |
576 | struct micscif_qp *qp = NULL; | |
577 | #ifdef _MIC_SCIF_ | |
578 | /* This is also a HACK. Even though the code is identical with the host right | |
579 | * now, I broke it into two parts because they will likely not be identical | |
580 | * moving forward | |
581 | */ | |
582 | qp = scifdev->qpairs; | |
583 | #else | |
584 | /* HORRIBLE HACK! Since we only have one card, and one scifdev, we | |
585 | * can just grab the scifdev->qp to find the qp. We don't actually have to | |
586 | * do any kind of looking for it | |
587 | */ | |
588 | qp = scifdev->qpairs; | |
589 | #endif /* !_MIC_SCIF_ */ | |
590 | return qp; | |
591 | } | |
592 | ||
593 | static char *scifdev_state[] = {"SCIFDEV_NOTPRESENT", | |
594 | "SCIFDEV_INIT", | |
595 | "SCIFDEV_RUNNING", | |
596 | "SCIFDEV_SLEEPING", | |
597 | "SCIFDEV_STOPPING", | |
598 | "SCIFDEV_STOPPED"}; | |
599 | ||
600 | static char *message_types[] = {"BAD", | |
601 | "INIT", | |
602 | "EXIT", | |
603 | "SCIF_NODE_ADD", | |
604 | "SCIF_NODE_ADD_ACK", | |
605 | "CNCT_REQ", | |
606 | "CNCT_GNT", | |
607 | "CNCT_GNTACK", | |
608 | "CNCT_GNTNACK", | |
609 | "CNCT_REJ", | |
610 | "CNCT_TERM", | |
611 | "TERM_ACK", | |
612 | "DISCNCT", | |
613 | "DISCNT_ACK", | |
614 | "REGISTER", | |
615 | "REGISTER_ACK", | |
616 | "REGISTER_NACK", | |
617 | "UNREGISTER", | |
618 | "UNREGISTER_ACK", | |
619 | "UNREGISTER_NACK", | |
620 | "ALLOC_REQ", | |
621 | "ALLOC_GNT", | |
622 | "ALLOC_REJ", | |
623 | "FREE_PHYS", | |
624 | "FREE_VIRT", | |
625 | "CLIENT_SENT", | |
626 | "CLIENT_RCVD", | |
627 | "MUNMAP", | |
628 | "MARK", | |
629 | "MARK_ACK", | |
630 | "MARK_NACK", | |
631 | "WAIT", | |
632 | "WAIT_ACK", | |
633 | "WAIT_NACK", | |
634 | "SIGNAL_LOCAL", | |
635 | "SIGNAL_REMOTE", | |
636 | "SIG_ACK", | |
637 | "SIG_NACK", | |
638 | "MAP_GTT", | |
639 | "MAP_GTT_ACK", | |
640 | "MAP_GTT_NACK", | |
641 | "UNMAP_GTT", | |
642 | "CREATE_NODE_DEP", | |
643 | "DESTROY_NODE_DEP", | |
644 | "REMOVE_NODE", | |
645 | "REMOVE_NODE_ACK", | |
646 | "WAKE_UP_NODE", | |
647 | "WAKE_UP_NODE_ACK", | |
648 | "WAKE_UP_NODE_NACK", | |
649 | "SCIF_NODE_ALIVE", | |
650 | "SCIF_NODE_ALIVE_ACK", | |
651 | "SCIF_SMPT", | |
652 | "SCIF_GTT_DMA_MAP", | |
653 | "SCIF_GTT_DMA_ACK", | |
654 | "SCIF_GTT_DMA_NACK", | |
655 | "SCIF_GTT_DMA_UNMAP", | |
656 | "SCIF_PROXY_DMA", | |
657 | "SCIF_PROXY_ORDERED_DMA", | |
658 | "SCIF_NODE_CONNECT", | |
659 | "SCIF_NODE_CONNECT_NACK", | |
660 | "SCIF_NODE_ADD_NACK", | |
661 | "SCIF_GET_NODE_INFO", | |
662 | "TEST"}; | |
663 | ||
664 | static void | |
665 | micscif_display_message(struct micscif_dev *scifdev, struct nodemsg *msg, | |
666 | const char *label) | |
667 | { | |
668 | if (!ms_info.en_msg_log) | |
669 | return; | |
670 | if (msg->uop > SCIF_MAX_MSG) { | |
671 | pr_debug("%s: unknown msg type %d\n", label, msg->uop); | |
672 | return; | |
673 | } | |
674 | if (msg->uop == SCIF_TEST) | |
675 | return; | |
676 | ||
677 | printk("%s: %s msg type %s, src %d:%d, dest %d:%d " | |
678 | "payload 0x%llx:0x%llx:0x%llx:0x%llx\n", | |
679 | label, scifdev_state[scifdev->sd_state], | |
680 | message_types[msg->uop], msg->src.node, msg->src.port, | |
681 | msg->dst.node, msg->dst.port, msg->payload[0], msg->payload[1], | |
682 | msg->payload[2], msg->payload[3]); | |
683 | } | |
684 | ||
685 | /** | |
686 | * micscif_nodeqp_send - Send a message on the Node Qp. | |
687 | * @scifdev: Scif Device. | |
688 | * @msg: The message to be sent. | |
689 | * | |
690 | * This function will block till a message is not sent to the destination | |
691 | * scif device. | |
692 | */ | |
693 | int micscif_nodeqp_send(struct micscif_dev *scifdev, | |
694 | struct nodemsg *msg, struct endpt *ep) | |
695 | { | |
696 | struct micscif_qp *qp; | |
697 | int err = -ENOMEM, loop_cnt = 0; | |
698 | ||
699 | if (oops_in_progress || | |
700 | (SCIF_INIT != msg->uop && | |
701 | SCIF_EXIT != msg->uop && | |
702 | SCIFDEV_RUNNING != scifdev->sd_state && | |
703 | SCIFDEV_SLEEPING != scifdev->sd_state) || | |
704 | (ep && SCIFDEV_STOPPED == ep->sd_state)) { | |
705 | err = -ENODEV; | |
706 | goto error; | |
707 | } | |
708 | ||
709 | micscif_display_message(scifdev, msg, "Sent"); | |
710 | ||
711 | qp = micscif_nodeqp_find(scifdev, (uint8_t)msg->dst.node); | |
712 | if (!qp) { | |
713 | err = -EINVAL; | |
714 | goto error; | |
715 | } | |
716 | spin_lock(&qp->qp_send_lock); | |
717 | ||
718 | while ((err = micscif_rb_write(&qp->outbound_q, | |
719 | msg, sizeof(struct nodemsg)))) { | |
720 | cpu_relax(); | |
721 | mdelay(1); | |
722 | if (loop_cnt++ > (NODEQP_SEND_TO_MSEC)) { | |
723 | err = -ENODEV; | |
724 | break; | |
725 | } | |
726 | } | |
727 | if (!err) | |
728 | micscif_rb_commit(&qp->outbound_q); | |
729 | spin_unlock(&qp->qp_send_lock); | |
730 | if (!err) { | |
731 | if (is_self_scifdev(scifdev)) | |
732 | /* | |
733 | * For loopback we need to emulate an interrupt by queueing | |
734 | * work for the queue handling real Node Qp interrupts. | |
735 | */ | |
736 | ||
737 | queue_work(scifdev->sd_intr_wq, &scifdev->sd_intr_bh); | |
738 | else | |
739 | scif_send_msg_intr(scifdev); | |
740 | } | |
741 | error: | |
742 | if (err) | |
743 | pr_debug("%s %d error %d uop %d\n", | |
744 | __func__, __LINE__, err, msg->uop); | |
745 | return err; | |
746 | } | |
747 | ||
748 | /* TODO: Make this actually figure out where the interrupt came from. For host, it can | |
749 | * be a little easier (one "vector" per board). For the cards, we'll have to do some | |
750 | * scanning, methinks | |
751 | */ | |
752 | struct micscif_qp *micscif_nodeqp_nextmsg(struct micscif_dev *scifdev) | |
753 | { | |
754 | return &scifdev->qpairs[0]; | |
755 | } | |
756 | ||
757 | /* | |
758 | * micscif_misc_handler: | |
759 | * | |
760 | * Work queue handler for servicing miscellaneous SCIF tasks. | |
761 | * Examples include: | |
762 | * 1) Remote fence requests. | |
763 | * 2) Destruction of temporary registered windows | |
764 | * created during scif_vreadfrom()/scif_vwriteto(). | |
765 | * 3) Cleanup of zombie endpoints. | |
766 | */ | |
767 | void micscif_misc_handler(struct work_struct *work) | |
768 | { | |
769 | micscif_rma_handle_remote_fences(); | |
770 | micscif_rma_destroy_temp_windows(); | |
771 | #ifdef _MIC_SCIF_ | |
772 | vm_unmap_aliases(); | |
773 | #endif | |
774 | micscif_rma_destroy_tcw_invalid(&ms_info.mi_rma_tc); | |
775 | micscif_cleanup_zombie_epd(); | |
776 | } | |
777 | ||
778 | /** | |
779 | * scif_init_resp() - Respond to SCIF_INIT interrupt message | |
780 | * @scifdev: Other node device to respond to | |
781 | * @msg: Interrupt message | |
782 | * | |
783 | * Loading the driver on the MIC card sends an INIT message to the host | |
784 | * with the PCI bus memory information it needs. This function receives | |
785 | * that message, finishes its intialization and echoes it back to the card. | |
786 | * | |
787 | * When the card receives the message this function starts a connection test. | |
788 | */ | |
789 | static __always_inline void | |
790 | scif_init_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
791 | { | |
792 | #ifdef _MIC_SCIF_ | |
793 | if (msg->payload[0] != 0xdeadbeef) | |
794 | printk(KERN_ERR "Bad payload 0x%llx\n", msg->payload[0]); | |
795 | #ifdef ENABLE_TEST | |
796 | else | |
797 | micscif_qp_testboth(scifdev); | |
798 | #endif | |
799 | #else | |
800 | pr_debug("scifhost(): sending response to INIT\n"); | |
801 | micscif_setuphost_response(scifdev, msg->payload[0]); | |
802 | atomic_set(&scifdev->sd_node_alive, 0); | |
803 | if (scifdev->sd_ln_wq) | |
804 | queue_delayed_work(scifdev->sd_ln_wq, | |
805 | &scifdev->sd_watchdog_work, NODE_ALIVE_TIMEOUT); | |
806 | #endif | |
807 | } | |
808 | ||
809 | /** | |
810 | * scif_exit_resp() - Respond to SCIF_EXIT interrupt message | |
811 | * @scifdev: Other node device to respond to | |
812 | * @msg: Interrupt message | |
813 | * | |
814 | * Loading the driver on the MIC card sends an INIT message to the host | |
815 | * with the PCI bus memory information it needs. This function receives | |
816 | * that message, finishes its intialization and echoes it back to the card. | |
817 | * | |
818 | * When the card receives the message this function starts a connection test. | |
819 | */ | |
820 | static __always_inline void | |
821 | scif_exit_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
822 | { | |
823 | #ifdef _MIC_SCIF_ | |
824 | printk("card: scif node %d exiting\n", ms_info.mi_nodeid); | |
825 | scif_dev[ms_info.mi_nodeid].sd_state = SCIFDEV_STOPPED; | |
826 | wake_up(&ms_info.mi_exitwq); | |
827 | #else | |
828 | printk("host: scif node %d exiting\n", msg->src.node); | |
829 | /* The interrupt handler that received the message would have | |
830 | * bumped up the ref_cnt by 1. micscif_removehost_response | |
831 | * calls micscif_cleanup_scifdev which loops forever for the ref_cnt | |
832 | * to drop to 0 thereby leading to a soft lockup. To prevent | |
833 | * that, decrement the ref_cnt here. | |
834 | */ | |
835 | micscif_dec_node_refcnt(scifdev, 1); | |
836 | micscif_removehost_respose(scifdev, msg); | |
837 | /* increment the ref_cnt here. The interrupt handler will now | |
838 | * decrement it, leaving the ref_cnt to 0 if everything | |
839 | * works as expected. Note that its not absolutely necessary | |
840 | * to do this execpt to make sure ref_cnt is 0 and to catch | |
841 | * errors that may happen if ref_cnt drops to a negative value. | |
842 | */ | |
843 | micscif_inc_node_refcnt(scifdev, 1); | |
844 | ||
845 | #endif | |
846 | } | |
847 | ||
848 | /** | |
849 | * scif_nodeadd_resp() - Respond to SCIF_NODE_ADD interrupt message | |
850 | * @scifdev: Other node device to respond to | |
851 | * @msg: Interrupt message | |
852 | * | |
853 | * When the host driver has finished initializing a MIC node queue pair it | |
854 | * marks the board as online. It then looks for all currently online MIC | |
855 | * cards and send a SCIF_NODE_ADD message to identify the ID of the new card for | |
856 | * peer to peer initialization | |
857 | * | |
858 | * The local node allocates its incoming queue and sends its address in the | |
859 | * SCIF_NODE_ADD_ACK message back to the host, the host "reflects" this message | |
860 | * to the new node | |
861 | */ | |
862 | static __always_inline void | |
863 | scif_nodeadd_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
864 | { | |
865 | #ifdef _MIC_SCIF_ | |
866 | struct micscif_dev *newdev; | |
867 | dma_addr_t qp_offset; | |
868 | int qp_connect; | |
869 | ||
870 | pr_debug("Scifdev %d:%d received NODE_ADD msg for node %d\n", | |
871 | scifdev->sd_node, msg->dst.node, msg->src.node); | |
872 | pr_debug("Remote address for this node's aperture %llx\n", | |
873 | msg->payload[0]); | |
874 | printk("Remote node's sbox %llx\n", msg->payload[1]); | |
875 | ||
876 | newdev = &scif_dev[msg->src.node]; | |
877 | newdev->sd_node = msg->src.node; | |
878 | ||
879 | if (micscif_setup_interrupts(newdev)) { | |
880 | printk(KERN_ERR "failed to setup interrupts for %d\n", msg->src.node); | |
881 | goto interrupt_setup_error; | |
882 | } | |
883 | ||
884 | newdev->mm_sbox = ioremap_nocache(msg->payload[1] + SBOX_OFFSET, SBOX_MMIO_LENGTH); | |
885 | ||
886 | if (!newdev->mm_sbox) { | |
887 | printk(KERN_ERR "failed to map mmio for %d\n", msg->src.node); | |
888 | goto mmio_map_error; | |
889 | } | |
890 | ||
891 | if (!(newdev->qpairs = kzalloc(sizeof(struct micscif_qp), GFP_KERNEL))) { | |
892 | printk(KERN_ERR "failed to allocate qpair for %d\n", msg->src.node); | |
893 | goto qp_alloc_error; | |
894 | } | |
895 | ||
896 | /* Set the base address of the remote node's memory since it gets | |
897 | * added to qp_offset | |
898 | */ | |
899 | newdev->sd_base_addr = msg->payload[0]; | |
900 | ||
901 | if ((qp_connect = micscif_setup_qp_connect(newdev->qpairs, &qp_offset, | |
902 | NODE_QP_SIZE, newdev))) { | |
903 | printk(KERN_ERR "failed to setup qp_connect %d\n", qp_connect); | |
904 | goto qp_connect_error; | |
905 | } | |
906 | ||
907 | if (register_scif_intr_handler(newdev)) | |
908 | goto qp_connect_error; | |
909 | ||
910 | newdev->scif_ref_cnt = (atomic_long_t) ATOMIC_LONG_INIT(0); | |
911 | micscif_node_add_callback(msg->src.node); | |
912 | newdev->qpairs->magic = SCIFEP_MAGIC; | |
913 | newdev->qpairs->qp_state = QP_OFFLINE; | |
914 | wmb(); | |
915 | ||
916 | msg->uop = SCIF_NODE_ADD_ACK; | |
917 | msg->dst.node = msg->src.node; | |
918 | msg->src.node = ms_info.mi_nodeid; | |
919 | msg->payload[0] = qp_offset; | |
920 | msg->payload[2] = get_rdmasr_offset(newdev->sd_intr_handle); | |
921 | msg->payload[3] = scif_dev[ms_info.mi_nodeid].sd_numa_node; | |
922 | micscif_nodeqp_send(&scif_dev[SCIF_HOST_NODE], msg, NULL); | |
923 | return; | |
924 | ||
925 | qp_connect_error: | |
926 | kfree(newdev->qpairs); | |
927 | newdev->qpairs = NULL; | |
928 | qp_alloc_error: | |
929 | iounmap(newdev->mm_sbox); | |
930 | newdev->mm_sbox = NULL; | |
931 | mmio_map_error: | |
932 | interrupt_setup_error: | |
933 | printk(KERN_ERR "node add failed for node %d\n", msg->src.node); | |
934 | /* | |
935 | * Update self with NODE ADD failure and send | |
936 | * nack to update the peer. | |
937 | */ | |
938 | mutex_lock(&newdev->sd_lock); | |
939 | newdev->sd_state = SCIFDEV_NOTPRESENT; | |
940 | mutex_unlock(&newdev->sd_lock); | |
941 | wake_up_interruptible(&newdev->sd_p2p_wq); | |
942 | msg->uop = SCIF_NODE_ADD_NACK; | |
943 | msg->dst.node = msg->src.node; | |
944 | msg->src.node = ms_info.mi_nodeid; | |
945 | micscif_nodeqp_send(&scif_dev[SCIF_HOST_NODE], msg, NULL); | |
946 | #endif | |
947 | } | |
948 | ||
949 | #ifdef _MIC_SCIF_ | |
950 | static inline void scif_p2pdev_uninit(struct micscif_dev *peerdev) | |
951 | { | |
952 | deregister_scif_intr_handler(peerdev); | |
953 | iounmap(peerdev->mm_sbox); | |
954 | mutex_lock(&peerdev->sd_lock); | |
955 | peerdev->sd_state = SCIFDEV_NOTPRESENT; | |
956 | mutex_unlock(&peerdev->sd_lock); | |
957 | } | |
958 | ||
959 | void scif_poll_qp_state(struct work_struct *work) | |
960 | { | |
961 | #define NODE_QP_RETRY 100 | |
962 | struct micscif_dev *peerdev = container_of(work, struct micscif_dev, | |
963 | sd_p2p_dwork.work); | |
964 | struct micscif_qp *qp = &peerdev->qpairs[0]; | |
965 | ||
966 | if (SCIFDEV_RUNNING != peerdev->sd_state) | |
967 | return; | |
968 | if (qp->qp_state == QP_OFFLINE) { | |
969 | if (peerdev->sd_p2p_retry++ == NODE_QP_RETRY) { | |
970 | printk(KERN_ERR "Warning: QP check timeout with " | |
971 | "state %d\n", qp->qp_state); | |
972 | goto timeout; | |
973 | } | |
974 | schedule_delayed_work(&peerdev->sd_p2p_dwork, | |
975 | msecs_to_jiffies(NODE_QP_TIMEOUT)); | |
976 | return; | |
977 | } | |
978 | wake_up(&peerdev->sd_p2p_wq); | |
979 | return; | |
980 | timeout: | |
981 | printk(KERN_ERR "%s %d remote node %d offline, state = 0x%x\n", | |
982 | __func__, __LINE__, peerdev->sd_node, qp->qp_state); | |
983 | micscif_inc_node_refcnt(peerdev, 1); | |
984 | qp->remote_qp->qp_state = QP_OFFLINE; | |
985 | micscif_dec_node_refcnt(peerdev, 1); | |
986 | scif_p2pdev_uninit(peerdev); | |
987 | wake_up(&peerdev->sd_p2p_wq); | |
988 | } | |
989 | #endif | |
990 | ||
991 | /** | |
992 | * scif_nodeaddack_resp() - Respond to SCIF_NODE_ADD_ACK interrupt message | |
993 | * @scifdev: Other node device to respond to | |
994 | * @msg: Interrupt message | |
995 | * | |
996 | * After a MIC node receives the SCIF_LINK_ADD_ACK message it send this | |
997 | * message to the host to confirm the sequeuce is finished. | |
998 | * | |
999 | */ | |
1000 | static __always_inline void | |
1001 | scif_nodeaddack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1002 | { | |
1003 | #ifdef _MIC_SCIF_ | |
1004 | struct micscif_dev *peerdev; | |
1005 | struct micscif_qp *qp; | |
1006 | #else | |
1007 | struct micscif_dev *dst_dev = &scif_dev[msg->dst.node]; | |
1008 | #endif | |
1009 | pr_debug("Scifdev %d received SCIF_NODE_ADD_ACK msg for src %d dst %d\n", | |
1010 | scifdev->sd_node, msg->src.node, msg->dst.node); | |
1011 | pr_debug("payload %llx %llx %llx %llx\n", msg->payload[0], msg->payload[1], | |
1012 | msg->payload[2], msg->payload[3]); | |
1013 | #ifndef _MIC_SCIF_ | |
1014 | ||
1015 | /* the lock serializes with micscif_setuphost_response | |
1016 | * The host is forwarding the NODE_ADD_ACK message from src to dst | |
1017 | * we need to make sure that the dst has already received a NODE_ADD | |
1018 | * for src and setup its end of the qp to dst | |
1019 | */ | |
1020 | mutex_lock(&ms_info.mi_conflock); | |
1021 | msg->payload[1] = ms_info.mi_maxid; | |
1022 | mutex_unlock(&ms_info.mi_conflock); | |
1023 | micscif_inc_node_refcnt(dst_dev, 1); | |
1024 | micscif_nodeqp_send(dst_dev, msg, NULL); | |
1025 | micscif_dec_node_refcnt(dst_dev, 1); | |
1026 | #else | |
1027 | peerdev = &scif_dev[msg->src.node]; | |
1028 | peerdev->sd_node = msg->src.node; | |
1029 | ||
1030 | if (peerdev->sd_state == SCIFDEV_NOTPRESENT) | |
1031 | return; | |
1032 | ||
1033 | qp = &peerdev->qpairs[0]; | |
1034 | ||
1035 | if ((micscif_setup_qp_connect_response(peerdev, &peerdev->qpairs[0], | |
1036 | msg->payload[0]))) | |
1037 | goto local_error; | |
1038 | ||
1039 | mutex_lock(&peerdev->sd_lock); | |
1040 | peerdev->sd_numa_node = msg->payload[3]; | |
1041 | /* | |
1042 | * Proxy the DMA only for P2P reads with transfer size | |
1043 | * greater than proxy DMA threshold. Proxying reads to convert | |
1044 | * them into writes is only required for host jaketown platforms | |
1045 | * when the two MIC devices are connected to the same | |
1046 | * QPI/IOH/numa node. The host will not pass the numa node | |
1047 | * information for non Intel Jaketown platforms and it will | |
1048 | * be -1 in that case. | |
1049 | */ | |
1050 | peerdev->sd_proxy_dma_reads = | |
1051 | mic_p2p_proxy_enable && | |
1052 | scif_dev[ms_info.mi_nodeid].sd_numa_node != -1 && | |
1053 | (peerdev->sd_numa_node == | |
1054 | scif_dev[ms_info.mi_nodeid].sd_numa_node); | |
1055 | peerdev->sd_state = SCIFDEV_RUNNING; | |
1056 | mutex_unlock(&peerdev->sd_lock); | |
1057 | ||
1058 | mutex_lock(&ms_info.mi_conflock); | |
1059 | ms_info.mi_maxid = msg->payload[1]; | |
1060 | peerdev->sd_rdmasr = msg->payload[2]; | |
1061 | mutex_unlock(&ms_info.mi_conflock); | |
1062 | ||
1063 | /* accessing the peer qp. Make sure the peer is awake*/ | |
1064 | micscif_inc_node_refcnt(peerdev, 1); | |
1065 | qp->remote_qp->qp_state = QP_ONLINE; | |
1066 | micscif_dec_node_refcnt(peerdev, 1); | |
1067 | schedule_delayed_work(&peerdev->sd_p2p_dwork, | |
1068 | msecs_to_jiffies(NODE_QP_TIMEOUT)); | |
1069 | return; | |
1070 | local_error: | |
1071 | scif_p2pdev_uninit(peerdev); | |
1072 | wake_up(&peerdev->sd_p2p_wq); | |
1073 | #endif | |
1074 | } | |
1075 | ||
1076 | /** | |
1077 | * scif_cnctreq_resp() - Respond to SCIF_CNCT_REQ interrupt message | |
1078 | * @msg: Interrupt message | |
1079 | * | |
1080 | * This message is initiated by the remote node to request a connection | |
1081 | * to the local node. This function looks for an end point in the | |
1082 | * listen state on the requested port id. | |
1083 | * | |
1084 | * If it finds a listening port it places the connect request on the | |
1085 | * listening end points queue and wakes up any pending accept calls. | |
1086 | * | |
1087 | * If it does not find a listening end point it sends a connection | |
1088 | * reject message to the remote node. | |
1089 | */ | |
1090 | static __always_inline void | |
1091 | scif_cnctreq_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1092 | { | |
1093 | struct endpt *ep = NULL; | |
1094 | struct conreq *conreq; | |
1095 | unsigned long sflags; | |
1096 | ||
1097 | if ((conreq = (struct conreq *)kmalloc(sizeof(struct conreq), GFP_KERNEL)) == NULL) { | |
1098 | // Lack of resources so reject the request. | |
1099 | goto conreq_sendrej; | |
1100 | } | |
1101 | ||
1102 | if ((ep = micscif_find_listen_ep(msg->dst.port, &sflags)) == NULL) { | |
1103 | // Send reject due to no listening ports | |
1104 | goto conreq_sendrej_free; | |
1105 | } | |
1106 | ||
1107 | if (ep->backlog <= ep->conreqcnt) { | |
1108 | // Send reject due to too many pending requests | |
1109 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1110 | goto conreq_sendrej_free; | |
1111 | } | |
1112 | ||
1113 | conreq->msg = *msg; | |
1114 | list_add_tail(&conreq->list, &ep->conlist); | |
1115 | ep->conreqcnt++; | |
1116 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1117 | ||
1118 | wake_up_interruptible(&ep->conwq); | |
1119 | return; | |
1120 | ||
1121 | conreq_sendrej_free: | |
1122 | kfree(conreq); | |
1123 | conreq_sendrej: | |
1124 | msg->uop = SCIF_CNCT_REJ; | |
1125 | micscif_nodeqp_send(&scif_dev[msg->src.node], msg, NULL); | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * scif_cnctgnt_resp() - Respond to SCIF_CNCT_GNT interrupt message | |
1130 | * @msg: Interrupt message | |
1131 | * | |
1132 | * An accept() on the remote node has occured and sent this message | |
1133 | * to indicate success. Place the end point in the MAPPING state and | |
1134 | * save the remote nodes memory information. Then wake up the connect | |
1135 | * request so it can finish. | |
1136 | */ | |
1137 | static __always_inline void | |
1138 | scif_cnctgnt_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1139 | { | |
1140 | unsigned long sflags; | |
1141 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1142 | ||
1143 | spin_lock_irqsave(&ep->lock, sflags); | |
1144 | if (SCIFEP_CONNECTING == ep->state) { | |
1145 | ep->peer.node = msg->src.node; | |
1146 | ep->peer.port = msg->src.port; | |
1147 | ep->qp_info.cnct_gnt_payload = msg->payload[1]; | |
1148 | ep->remote_ep = msg->payload[2]; | |
1149 | ep->state = SCIFEP_MAPPING; | |
1150 | ||
1151 | wake_up_interruptible(&ep->conwq); | |
1152 | wake_up(&ep->diswq); | |
1153 | } | |
1154 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1155 | } | |
1156 | ||
1157 | /** | |
1158 | * scif_cnctgntack_resp() - Respond to SCIF_CNCT_GNTACK interrupt message | |
1159 | * @msg: Interrupt message | |
1160 | * | |
1161 | * The remote connection request has finished mapping the local memmory. | |
1162 | * Place the connection in the connected state and wake up the pending | |
1163 | * accept() call. | |
1164 | */ | |
1165 | static __always_inline void | |
1166 | scif_cnctgntack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1167 | { | |
1168 | unsigned long sflags; | |
1169 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1170 | ||
1171 | spin_lock_irqsave(&ms_info.mi_connlock, sflags); | |
1172 | spin_lock(&ep->lock); | |
1173 | // New ep is now connected with all resouces set. | |
1174 | ep->state = SCIFEP_CONNECTED; | |
1175 | list_add_tail(&ep->list, &ms_info.mi_connected); | |
1176 | get_conn_count(scifdev); | |
1177 | wake_up(&ep->conwq); | |
1178 | spin_unlock(&ep->lock); | |
1179 | spin_unlock_irqrestore(&ms_info.mi_connlock, sflags); | |
1180 | } | |
1181 | ||
1182 | /** | |
1183 | * scif_cnctgntnack_resp() - Respond to SCIF_CNCT_GNTNACK interrupt message | |
1184 | * @msg: Interrupt message | |
1185 | * | |
1186 | * The remote connection request failed to map the local memory it was sent. | |
1187 | * Place the end point in the CLOSING state to indicate it and wake up | |
1188 | * the pending accept(); | |
1189 | */ | |
1190 | static __always_inline void | |
1191 | scif_cnctgntnack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1192 | { | |
1193 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1194 | unsigned long sflags; | |
1195 | ||
1196 | spin_lock_irqsave(&ep->lock, sflags); | |
1197 | ep->state = SCIFEP_CLOSING; | |
1198 | wake_up(&ep->conwq); | |
1199 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1200 | } | |
1201 | ||
1202 | /** | |
1203 | * scif_cnctrej_resp() - Respond to SCIF_CNCT_REJ interrupt message | |
1204 | * @msg: Interrupt message | |
1205 | * | |
1206 | * The remote end has rejected the connection request. Set the end | |
1207 | * point back to the bound state and wake up the pending connect(). | |
1208 | */ | |
1209 | static __always_inline void | |
1210 | scif_cnctrej_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1211 | { | |
1212 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1213 | unsigned long sflags; | |
1214 | ||
1215 | spin_lock_irqsave(&ep->lock, sflags); | |
1216 | if (SCIFEP_CONNECTING == ep->state) { | |
1217 | ep->state = SCIFEP_BOUND; | |
1218 | wake_up_interruptible(&ep->conwq); | |
1219 | } | |
1220 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * scif_cnctterm_resp() - Respond to SCIF_CNCT_TERM interrupt message | |
1225 | * @msg: Interrupt message | |
1226 | * | |
1227 | * The remote connect() has waited to long for an accept() to occur and | |
1228 | * is removing the connection request. | |
1229 | * | |
1230 | * If the connection request is not found then it is currently being | |
1231 | * processed and a NACK is sent to indicate to the remote connect() to | |
1232 | * wait for connection to complete. | |
1233 | * | |
1234 | * Otherwise the request is removed and an ACK is returned to indicate | |
1235 | * success. | |
1236 | */ | |
1237 | static __always_inline void | |
1238 | scif_cnctterm_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1239 | { | |
1240 | unsigned long sflags; | |
1241 | struct endpt *ep = NULL; | |
1242 | struct conreq *conreq = NULL; | |
1243 | ||
1244 | ep = micscif_find_listen_ep(msg->dst.port, &sflags); | |
1245 | ||
1246 | if (ep != NULL) { | |
1247 | conreq = miscscif_get_connection_request(ep, msg->payload[0]); | |
1248 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1249 | } | |
1250 | ||
1251 | if (conreq != NULL) { | |
1252 | kfree(conreq); | |
1253 | msg->uop = SCIF_TERM_ACK; | |
1254 | micscif_nodeqp_send(&scif_dev[msg->src.node], msg, NULL); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * scif_termack_resp() - Respond to SCIF_TERM_ACK interrupt message | |
1260 | * @msg: Interrupt message | |
1261 | * | |
1262 | * Connection termination has been confirmed so set the end point | |
1263 | * to bound and allow the connection request to error out. | |
1264 | */ | |
1265 | static __always_inline void | |
1266 | scif_termack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1267 | { | |
1268 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1269 | unsigned long sflags; | |
1270 | ||
1271 | spin_lock_irqsave(&ep->lock, sflags); | |
1272 | if (ep->state != SCIFEP_BOUND) { | |
1273 | ep->state = SCIFEP_BOUND; | |
1274 | wake_up(&ep->diswq); | |
1275 | } | |
1276 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * scif_discnct_resp() - Respond to SCIF_DISCNCT interrupt message | |
1281 | * @msg: Interrupt message | |
1282 | * | |
1283 | * The remote node has indicated close() has been called on its end | |
1284 | * point. Remove the local end point from the connected list, set its | |
1285 | * state to disconnected and ensure accesses to the remote node are | |
1286 | * shutdown. | |
1287 | * | |
1288 | * When all accesses to the remote end have completed then send a | |
1289 | * DISCNT_ACK to indicate it can remove its resources and complete | |
1290 | * the close routine. | |
1291 | */ | |
1292 | static __always_inline void | |
1293 | scif_discnct_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1294 | { | |
1295 | unsigned long sflags; | |
1296 | struct endpt *ep = NULL; | |
1297 | struct endpt *tmpep; | |
1298 | struct list_head *pos, *tmpq; | |
1299 | ||
1300 | spin_lock_irqsave(&ms_info.mi_connlock, sflags); | |
1301 | list_for_each_safe(pos, tmpq, &ms_info.mi_connected) { | |
1302 | tmpep = list_entry(pos, struct endpt, list); | |
1303 | if (((uint64_t)tmpep == msg->payload[1]) && ((uint64_t)tmpep->remote_ep == msg->payload[0])) { | |
1304 | list_del(pos); | |
1305 | put_conn_count(scifdev); | |
1306 | ep = tmpep; | |
1307 | spin_lock(&ep->lock); | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | // If the terminated end is not found then this side started closing | |
1313 | // before the other side sent the disconnect. If so the ep will no | |
1314 | // longer be on the connected list. Reguardless the other side | |
1315 | // needs to be acked to let it know close is complete. | |
1316 | if (ep == NULL) { | |
1317 | // Need to unlock conn lock and restore irq state | |
1318 | spin_unlock_irqrestore(&ms_info.mi_connlock, sflags); | |
1319 | goto discnct_resp_ack; | |
1320 | } | |
1321 | ||
1322 | ep->state = SCIFEP_DISCONNECTED; | |
1323 | list_add_tail(&ep->list, &ms_info.mi_disconnected); | |
1324 | ||
1325 | // TODO Cause associated resources to be freed. | |
1326 | // First step: wake up threads blocked in send and recv | |
1327 | wake_up_interruptible(&ep->sendwq); | |
1328 | wake_up_interruptible(&ep->recvwq); | |
1329 | wake_up_interruptible(&ep->conwq); | |
1330 | spin_unlock(&ep->lock); | |
1331 | spin_unlock_irqrestore(&ms_info.mi_connlock, sflags); | |
1332 | ||
1333 | discnct_resp_ack: | |
1334 | msg->uop = SCIF_DISCNT_ACK; | |
1335 | micscif_nodeqp_send(&scif_dev[msg->src.node], msg, NULL); | |
1336 | } | |
1337 | ||
1338 | /** | |
1339 | * scif_discnctack_resp() - Respond to SCIF_DISCNT_ACK interrupt message | |
1340 | * @msg: Interrupt message | |
1341 | * | |
1342 | * Remote side has indicated it has not more references to local resources | |
1343 | */ | |
1344 | static __always_inline void | |
1345 | scif_discntack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1346 | { | |
1347 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1348 | unsigned long sflags; | |
1349 | ||
1350 | spin_lock_irqsave(&ep->lock, sflags); | |
1351 | ep->state = SCIFEP_DISCONNECTED; | |
1352 | wake_up(&ep->disconwq); | |
1353 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * scif_clientsend_resp() - Respond to SCIF_CLIENT_SEND interrupt message | |
1358 | * @msg: Interrupt message | |
1359 | * | |
1360 | * Remote side is confirming send or recieve interrupt handling is complete. | |
1361 | */ | |
1362 | static __always_inline void | |
1363 | scif_clientsend_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1364 | { | |
1365 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1366 | ||
1367 | if (SCIFEP_CONNECTED == ep->state) { | |
1368 | wake_up_interruptible(&ep->recvwq); | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | /** | |
1373 | * scif_clientrcvd_resp() - Respond to SCIF_CLIENT_RCVD interrupt message | |
1374 | * @msg: Interrupt message | |
1375 | * | |
1376 | * Remote side is confirming send or recieve interrupt handling is complete. | |
1377 | */ | |
1378 | static __always_inline void | |
1379 | scif_clientrcvd_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1380 | { | |
1381 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1382 | ||
1383 | if (SCIFEP_CONNECTED == ep->state) { | |
1384 | wake_up_interruptible(&ep->sendwq); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | /** | |
1389 | * scif_alloc_req: Respond to SCIF_ALLOC_REQ interrupt message | |
1390 | * @msg: Interrupt message | |
1391 | * | |
1392 | * Remote side is requesting a memory allocation. | |
1393 | */ | |
1394 | static __always_inline void | |
1395 | scif_alloc_req(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1396 | { | |
1397 | int err, opcode = (int)msg->payload[3]; | |
1398 | struct reg_range_t *window = 0; | |
1399 | size_t nr_pages = msg->payload[1]; | |
1400 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1401 | ||
1402 | might_sleep(); | |
1403 | ||
1404 | if (SCIFEP_CONNECTED != ep->state) { | |
1405 | err = -ENOTCONN; | |
1406 | goto error; | |
1407 | } | |
1408 | ||
1409 | switch (opcode) { | |
1410 | case SCIF_REGISTER: | |
1411 | if (!(window = micscif_create_remote_window(ep, | |
1412 | (int)nr_pages))) { | |
1413 | err = -ENOMEM; | |
1414 | goto error; | |
1415 | } | |
1416 | break; | |
1417 | default: | |
1418 | /* Unexpected allocation request */ | |
1419 | printk(KERN_ERR "Unexpected allocation request opcode 0x%x ep = 0x%p " | |
1420 | " scifdev->sd_state 0x%x scifdev->sd_node 0x%x\n", | |
1421 | opcode, ep, scifdev->sd_state, scifdev->sd_node); | |
1422 | err = -EINVAL; | |
1423 | goto error; | |
1424 | }; | |
1425 | ||
1426 | /* The peer's allocation request is granted */ | |
1427 | msg->uop = SCIF_ALLOC_GNT; | |
1428 | msg->payload[0] = (uint64_t)window; | |
1429 | msg->payload[1] = window->mapped_offset; | |
1430 | if ((err = micscif_nodeqp_send(ep->remote_dev, msg, ep))) | |
1431 | micscif_destroy_remote_window(ep, window); | |
1432 | return; | |
1433 | error: | |
1434 | /* The peer's allocation request is rejected */ | |
1435 | printk(KERN_ERR "%s %d error %d alloc_ptr %p nr_pages 0x%lx\n", | |
1436 | __func__, __LINE__, err, window, nr_pages); | |
1437 | msg->uop = SCIF_ALLOC_REJ; | |
1438 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1439 | } | |
1440 | ||
1441 | /** | |
1442 | * scif_alloc_gnt_rej: Respond to SCIF_ALLOC_GNT/REJ interrupt message | |
1443 | * @msg: Interrupt message | |
1444 | * | |
1445 | * Remote side responded to a memory allocation. | |
1446 | */ | |
1447 | static __always_inline void | |
1448 | scif_alloc_gnt_rej(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1449 | { | |
1450 | struct allocmsg *handle = (struct allocmsg *)msg->payload[2]; | |
1451 | switch (handle->uop) { | |
1452 | case SCIF_REGISTER: | |
1453 | { | |
1454 | handle->vaddr = (void *)msg->payload[0]; | |
1455 | handle->phys_addr = msg->payload[1]; | |
1456 | if (msg->uop == SCIF_ALLOC_GNT) | |
1457 | handle->state = OP_COMPLETED; | |
1458 | else | |
1459 | handle->state = OP_FAILED; | |
1460 | wake_up(&handle->allocwq); | |
1461 | break; | |
1462 | } | |
1463 | default: | |
1464 | { | |
1465 | printk(KERN_ERR "Bug Unknown alloc uop 0x%x\n", handle->uop); | |
1466 | } | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | /** | |
1471 | * scif_free_phys: Respond to SCIF_FREE_PHYS interrupt message | |
1472 | * @msg: Interrupt message | |
1473 | * | |
1474 | * Remote side is done accessing earlier memory allocation. | |
1475 | * Remove GTT/PCI mappings created earlier. | |
1476 | */ | |
1477 | static __always_inline void | |
1478 | scif_free_phys(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1479 | { | |
1480 | return; | |
1481 | } | |
1482 | ||
1483 | /** | |
1484 | * scif_free_phys: Respond to SCIF_FREE_VIRT interrupt message | |
1485 | * @msg: Interrupt message | |
1486 | * | |
1487 | * Free up memory kmalloc'd earlier. | |
1488 | */ | |
1489 | static __always_inline void | |
1490 | scif_free_virt(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1491 | { | |
1492 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1493 | int opcode = (int)msg->payload[3]; | |
1494 | struct reg_range_t *window = | |
1495 | (struct reg_range_t *)msg->payload[1]; | |
1496 | ||
1497 | switch (opcode) { | |
1498 | case SCIF_REGISTER: | |
1499 | micscif_destroy_remote_window(ep, window); | |
1500 | break; | |
1501 | default: | |
1502 | /* Unexpected allocation request */ | |
1503 | BUG_ON(opcode != SCIF_REGISTER); | |
1504 | }; | |
1505 | } | |
1506 | ||
1507 | /** | |
1508 | * scif_recv_register: Respond to SCIF_REGISTER interrupt message | |
1509 | * @msg: Interrupt message | |
1510 | * | |
1511 | * Update remote window list with a new registered window. | |
1512 | */ | |
1513 | static __always_inline void | |
1514 | scif_recv_register(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1515 | { | |
1516 | unsigned long sflags; | |
1517 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1518 | struct reg_range_t *window = | |
1519 | (struct reg_range_t *)msg->payload[1]; | |
1520 | ||
1521 | might_sleep(); | |
1522 | RMA_MAGIC(window); | |
1523 | mutex_lock(&ep->rma_info.rma_lock); | |
1524 | /* FIXME: | |
1525 | * ep_lock lock needed ? rma_lock is already held | |
1526 | */ | |
1527 | spin_lock_irqsave(&ep->lock, sflags); | |
1528 | if (SCIFEP_CONNECTED == ep->state) { | |
1529 | msg->uop = SCIF_REGISTER_ACK; | |
1530 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1531 | micscif_set_nr_pages(ep->remote_dev, window); | |
1532 | /* No further failures expected. Insert new window */ | |
1533 | micscif_insert_window(window, | |
1534 | &ep->rma_info.remote_reg_list); | |
1535 | } else { | |
1536 | msg->uop = SCIF_REGISTER_NACK; | |
1537 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1538 | } | |
1539 | spin_unlock_irqrestore(&ep->lock, sflags); | |
1540 | mutex_unlock(&ep->rma_info.rma_lock); | |
1541 | /* | |
1542 | * We could not insert the window but we need to | |
1543 | * destroy the window. | |
1544 | */ | |
1545 | if (SCIF_REGISTER_NACK == msg->uop) | |
1546 | micscif_destroy_remote_window(ep, window); | |
1547 | else { | |
1548 | #ifdef _MIC_SCIF_ | |
1549 | micscif_destroy_remote_lookup(ep, window); | |
1550 | #endif | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * scif_recv_unregister: Respond to SCIF_UNREGISTER interrupt message | |
1556 | * @msg: Interrupt message | |
1557 | * | |
1558 | * Remove window from remote registration list; | |
1559 | */ | |
1560 | static __always_inline void | |
1561 | scif_recv_unregister(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1562 | { | |
1563 | struct micscif_rma_req req; | |
1564 | struct reg_range_t *window = NULL; | |
1565 | struct reg_range_t *recv_window = | |
1566 | (struct reg_range_t *)msg->payload[0]; | |
1567 | struct endpt *ep; | |
1568 | int del_window = 0; | |
1569 | ||
1570 | might_sleep(); | |
1571 | RMA_MAGIC(recv_window); | |
1572 | ep = (struct endpt *)recv_window->ep; | |
1573 | req.out_window = &window; | |
1574 | req.offset = recv_window->offset; | |
1575 | req.prot = 0; | |
1576 | req.nr_bytes = recv_window->nr_pages << PAGE_SHIFT; | |
1577 | req.type = WINDOW_FULL; | |
1578 | req.head = &ep->rma_info.remote_reg_list; | |
1579 | msg->payload[0] = ep->remote_ep; | |
1580 | ||
1581 | mutex_lock(&ep->rma_info.rma_lock); | |
1582 | /* | |
1583 | * Does a valid window exist? | |
1584 | */ | |
1585 | if (micscif_query_window(&req)) { | |
1586 | printk(KERN_ERR "%s %d -ENXIO\n", __func__, __LINE__); | |
1587 | msg->uop = SCIF_UNREGISTER_ACK; | |
1588 | goto error; | |
1589 | } | |
1590 | if (window) { | |
1591 | RMA_MAGIC(window); | |
1592 | if (window->ref_count) | |
1593 | put_window_ref_count(window, window->nr_pages); | |
1594 | window->unreg_state = OP_COMPLETED; | |
1595 | if (!window->ref_count) { | |
1596 | msg->uop = SCIF_UNREGISTER_ACK; | |
1597 | atomic_inc(&ep->rma_info.tw_refcount); | |
1598 | atomic_add_return((int32_t)window->nr_pages, &ep->rma_info.tw_total_pages); | |
1599 | ep->rma_info.async_list_del = 1; | |
1600 | list_del(&window->list_member); | |
1601 | window->offset = INVALID_VA_GEN_ADDRESS; | |
1602 | del_window = 1; | |
1603 | } else | |
1604 | /* NACK! There are valid references to this window */ | |
1605 | msg->uop = SCIF_UNREGISTER_NACK; | |
1606 | } else { | |
1607 | /* The window did not make its way to the list at all. ACK */ | |
1608 | msg->uop = SCIF_UNREGISTER_ACK; | |
1609 | micscif_destroy_remote_window(ep, recv_window); | |
1610 | } | |
1611 | error: | |
1612 | mutex_unlock(&ep->rma_info.rma_lock); | |
1613 | if (del_window) | |
1614 | drain_dma_intr(ep->rma_info.dma_chan); | |
1615 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1616 | if (del_window) | |
1617 | micscif_queue_for_cleanup(window, &ms_info.mi_rma); | |
1618 | return; | |
1619 | } | |
1620 | ||
1621 | /** | |
1622 | * scif_recv_register_ack: Respond to SCIF_REGISTER_ACK interrupt message | |
1623 | * @msg: Interrupt message | |
1624 | * | |
1625 | * Wake up the window waiting to complete registration. | |
1626 | */ | |
1627 | static __always_inline void | |
1628 | scif_recv_register_ack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1629 | { | |
1630 | struct reg_range_t *window = | |
1631 | (struct reg_range_t *)msg->payload[2]; | |
1632 | RMA_MAGIC(window); | |
1633 | window->reg_state = OP_COMPLETED; | |
1634 | wake_up(&window->regwq); | |
1635 | } | |
1636 | ||
1637 | /** | |
1638 | * scif_recv_register_nack: Respond to SCIF_REGISTER_NACK interrupt message | |
1639 | * @msg: Interrupt message | |
1640 | * | |
1641 | * Wake up the window waiting to inform it that registration | |
1642 | * cannot be completed. | |
1643 | */ | |
1644 | static __always_inline void | |
1645 | scif_recv_register_nack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1646 | { | |
1647 | struct reg_range_t *window = | |
1648 | (struct reg_range_t *)msg->payload[2]; | |
1649 | RMA_MAGIC(window); | |
1650 | window->reg_state = OP_FAILED; | |
1651 | wake_up(&window->regwq); | |
1652 | } | |
1653 | /** | |
1654 | * scif_recv_unregister_ack: Respond to SCIF_UNREGISTER_ACK interrupt message | |
1655 | * @msg: Interrupt message | |
1656 | * | |
1657 | * Wake up the window waiting to complete unregistration. | |
1658 | */ | |
1659 | static __always_inline void | |
1660 | scif_recv_unregister_ack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1661 | { | |
1662 | struct reg_range_t *window = | |
1663 | (struct reg_range_t *)msg->payload[1]; | |
1664 | RMA_MAGIC(window); | |
1665 | window->unreg_state = OP_COMPLETED; | |
1666 | wake_up(&window->unregwq); | |
1667 | } | |
1668 | ||
1669 | /** | |
1670 | * scif_recv_unregister_nack: Respond to SCIF_UNREGISTER_NACK interrupt message | |
1671 | * @msg: Interrupt message | |
1672 | * | |
1673 | * Wake up the window waiting to inform it that unregistration | |
1674 | * cannot be completed immediately. | |
1675 | */ | |
1676 | static __always_inline void | |
1677 | scif_recv_unregister_nack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1678 | { | |
1679 | struct reg_range_t *window = | |
1680 | (struct reg_range_t *)msg->payload[1]; | |
1681 | RMA_MAGIC(window); | |
1682 | window->unreg_state = OP_FAILED; | |
1683 | wake_up(&window->unregwq); | |
1684 | } | |
1685 | ||
1686 | static __always_inline void | |
1687 | scif_recv_munmap(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1688 | { | |
1689 | struct micscif_rma_req req; | |
1690 | struct reg_range_t *window = NULL; | |
1691 | struct reg_range_t *recv_window = | |
1692 | (struct reg_range_t *)msg->payload[0]; | |
1693 | struct endpt *ep; | |
1694 | int del_window = 0; | |
1695 | ||
1696 | might_sleep(); | |
1697 | RMA_MAGIC(recv_window); | |
1698 | ep = (struct endpt *)recv_window->ep; | |
1699 | req.out_window = &window; | |
1700 | req.offset = recv_window->offset; | |
1701 | req.prot = recv_window->prot; | |
1702 | req.nr_bytes = recv_window->nr_pages << PAGE_SHIFT; | |
1703 | req.type = WINDOW_FULL; | |
1704 | req.head = &ep->rma_info.reg_list; | |
1705 | msg->payload[0] = ep->remote_ep; | |
1706 | ||
1707 | mutex_lock(&ep->rma_info.rma_lock); | |
1708 | /* | |
1709 | * Does a valid window exist? | |
1710 | */ | |
1711 | if (micscif_query_window(&req)) { | |
1712 | printk(KERN_ERR "%s %d -ENXIO\n", __func__, __LINE__); | |
1713 | msg->uop = SCIF_UNREGISTER_ACK; | |
1714 | goto error; | |
1715 | } | |
1716 | ||
1717 | RMA_MAGIC(window); | |
1718 | ||
1719 | if (window->ref_count) | |
1720 | put_window_ref_count(window, window->nr_pages); | |
1721 | ||
1722 | if (!window->ref_count) { | |
1723 | atomic_inc(&ep->rma_info.tw_refcount); | |
1724 | atomic_add_return((int32_t)window->nr_pages, &ep->rma_info.tw_total_pages); | |
1725 | ep->rma_info.async_list_del = 1; | |
1726 | list_del(&window->list_member); | |
1727 | micscif_free_window_offset(ep, window->offset, | |
1728 | window->nr_pages << PAGE_SHIFT); | |
1729 | window->offset_freed = true; | |
1730 | del_window = 1; | |
1731 | } | |
1732 | error: | |
1733 | mutex_unlock(&ep->rma_info.rma_lock); | |
1734 | if (del_window) | |
1735 | micscif_queue_for_cleanup(window, &ms_info.mi_rma); | |
1736 | } | |
1737 | ||
1738 | /** | |
1739 | * scif_recv_mark: Handle SCIF_MARK request | |
1740 | * @msg: Interrupt message | |
1741 | * | |
1742 | * The peer has requested a mark. | |
1743 | */ | |
1744 | static __always_inline void | |
1745 | scif_recv_mark(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1746 | { | |
1747 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1748 | int mark; | |
1749 | ||
1750 | if (SCIFEP_CONNECTED != ep->state) { | |
1751 | msg->payload[0] = ep->remote_ep; | |
1752 | msg->uop = SCIF_MARK_NACK; | |
1753 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1754 | return; | |
1755 | } | |
1756 | ||
1757 | if ((mark = micscif_fence_mark(ep)) < 0) | |
1758 | msg->uop = SCIF_MARK_NACK; | |
1759 | else | |
1760 | msg->uop = SCIF_MARK_ACK; | |
1761 | msg->payload[0] = ep->remote_ep; | |
1762 | msg->payload[2] = mark; | |
1763 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1764 | } | |
1765 | ||
1766 | /** | |
1767 | * scif_recv_mark_resp: Handle SCIF_MARK_(N)ACK messages. | |
1768 | * @msg: Interrupt message | |
1769 | * | |
1770 | * The peer has responded to a SCIF_MARK message. | |
1771 | */ | |
1772 | static __always_inline void | |
1773 | scif_recv_mark_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1774 | { | |
1775 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1776 | struct fence_info *fence_req = (struct fence_info *)msg->payload[1]; | |
1777 | ||
1778 | mutex_lock(&ep->rma_info.rma_lock); | |
1779 | if (SCIF_MARK_ACK == msg->uop) { | |
1780 | fence_req->state = OP_COMPLETED; | |
1781 | fence_req->dma_mark = (int)msg->payload[2]; | |
1782 | } else | |
1783 | fence_req->state = OP_FAILED; | |
1784 | wake_up(&fence_req->wq); | |
1785 | mutex_unlock(&ep->rma_info.rma_lock); | |
1786 | } | |
1787 | ||
1788 | /** | |
1789 | * scif_recv_wait: Handle SCIF_WAIT request | |
1790 | * @msg: Interrupt message | |
1791 | * | |
1792 | * The peer has requested waiting on a fence. | |
1793 | */ | |
1794 | static __always_inline void | |
1795 | scif_recv_wait(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1796 | { | |
1797 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1798 | struct remote_fence_info *fence; | |
1799 | ||
1800 | /* | |
1801 | * Allocate structure for remote fence information and | |
1802 | * send a NACK if the allocation failed. The peer will | |
1803 | * return ENOMEM upon receiving a NACK. | |
1804 | */ | |
1805 | if (!(fence = (struct remote_fence_info *)kmalloc( | |
1806 | sizeof(struct remote_fence_info), GFP_KERNEL))) { | |
1807 | msg->payload[0] = ep->remote_ep; | |
1808 | msg->uop = SCIF_WAIT_NACK; | |
1809 | micscif_nodeqp_send(ep->remote_dev, msg, ep); | |
1810 | return; | |
1811 | } | |
1812 | ||
1813 | /* Prepare the fence request */ | |
1814 | memcpy(&fence->msg, msg, sizeof(struct nodemsg)); | |
1815 | INIT_LIST_HEAD(&fence->list_member); | |
1816 | ||
1817 | /* Insert to the global remote fence request list */ | |
1818 | mutex_lock(&ms_info.mi_fencelock); | |
1819 | ep->rma_info.fence_refcount++; | |
1820 | list_add_tail(&fence->list_member, &ms_info.mi_fence); | |
1821 | mutex_unlock(&ms_info.mi_fencelock); | |
1822 | ||
1823 | queue_work(ms_info.mi_misc_wq, &ms_info.mi_misc_work); | |
1824 | } | |
1825 | ||
1826 | /** | |
1827 | * scif_recv_wait_resp: Handle SCIF_WAIT_(N)ACK messages. | |
1828 | * @msg: Interrupt message | |
1829 | * | |
1830 | * The peer has responded to a SCIF_WAIT message. | |
1831 | */ | |
1832 | static __always_inline void | |
1833 | scif_recv_wait_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1834 | { | |
1835 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1836 | struct fence_info *fence_req = (struct fence_info *)msg->payload[1]; | |
1837 | ||
1838 | mutex_lock(&ep->rma_info.rma_lock); | |
1839 | if (SCIF_WAIT_ACK == msg->uop) | |
1840 | fence_req->state = OP_COMPLETED; | |
1841 | else | |
1842 | fence_req->state = OP_FAILED; | |
1843 | wake_up(&fence_req->wq); | |
1844 | mutex_unlock(&ep->rma_info.rma_lock); | |
1845 | } | |
1846 | ||
1847 | /** | |
1848 | * scif_recv_local_signal: Handle SCIF_SIG_LOCAL request | |
1849 | * @msg: Interrupt message | |
1850 | * | |
1851 | * The peer has requested a signal on a local offset. | |
1852 | */ | |
1853 | static __always_inline void | |
1854 | scif_recv_signal_local(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1855 | { | |
1856 | int err = 0; | |
1857 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1858 | ||
1859 | err = micscif_prog_signal(ep, | |
1860 | msg->payload[1], | |
1861 | msg->payload[2], | |
1862 | RMA_WINDOW_SELF); | |
1863 | if (err) | |
1864 | msg->uop = SCIF_SIG_NACK; | |
1865 | else | |
1866 | msg->uop = SCIF_SIG_ACK; | |
1867 | msg->payload[0] = ep->remote_ep; | |
1868 | if ((err = micscif_nodeqp_send(ep->remote_dev, msg, ep))) | |
1869 | printk(KERN_ERR "%s %d err %d\n", __func__, __LINE__, err); | |
1870 | } | |
1871 | ||
1872 | /** | |
1873 | * scif_recv_signal_remote: Handle SCIF_SIGNAL_REMOTE request | |
1874 | * @msg: Interrupt message | |
1875 | * | |
1876 | * The peer has requested a signal on a remote offset. | |
1877 | */ | |
1878 | static __always_inline void | |
1879 | scif_recv_signal_remote(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1880 | { | |
1881 | int err = 0; | |
1882 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1883 | ||
1884 | err = micscif_prog_signal(ep, | |
1885 | msg->payload[1], | |
1886 | msg->payload[2], | |
1887 | RMA_WINDOW_PEER); | |
1888 | if (err) | |
1889 | msg->uop = SCIF_SIG_NACK; | |
1890 | else | |
1891 | msg->uop = SCIF_SIG_ACK; | |
1892 | msg->payload[0] = ep->remote_ep; | |
1893 | if ((err = micscif_nodeqp_send(ep->remote_dev, msg, ep))) | |
1894 | printk(KERN_ERR "%s %d err %d\n", __func__, __LINE__, err); | |
1895 | } | |
1896 | ||
1897 | /** | |
1898 | * scif_recv_signal_remote: Handle SCIF_SIG_(N)ACK messages. | |
1899 | * @msg: Interrupt message | |
1900 | * | |
1901 | * The peer has responded to a signal request. | |
1902 | */ | |
1903 | static __always_inline void | |
1904 | scif_recv_signal_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1905 | { | |
1906 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
1907 | struct fence_info *fence_req = (struct fence_info *)msg->payload[3]; | |
1908 | ||
1909 | mutex_lock(&ep->rma_info.rma_lock); | |
1910 | if (SCIF_SIG_ACK == msg->uop) | |
1911 | fence_req->state = OP_COMPLETED; | |
1912 | else | |
1913 | fence_req->state = OP_FAILED; | |
1914 | wake_up(&fence_req->wq); | |
1915 | mutex_unlock(&ep->rma_info.rma_lock); | |
1916 | } | |
1917 | ||
1918 | /* | |
1919 | * scif_node_wake_up_ack: Handle SCIF_NODE_WAKE_UP_ACK message | |
1920 | * @msg: Interrupt message | |
1921 | * | |
1922 | * Response for a SCIF_NODE_WAKE_UP message. | |
1923 | */ | |
1924 | static __always_inline void | |
1925 | scif_node_wake_up_ack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1926 | { | |
1927 | scif_dev[msg->payload[0]].sd_wait_status = OP_COMPLETED; | |
1928 | wake_up(&scif_dev[msg->payload[0]].sd_wq); | |
1929 | } | |
1930 | ||
1931 | /* | |
1932 | * scif_node_wake_up_nack: Handle SCIF_NODE_WAKE_UP_NACK message | |
1933 | * @msg: Interrupt message | |
1934 | * | |
1935 | * Response for a SCIF_NODE_WAKE_UP message. | |
1936 | */ | |
1937 | static __always_inline void | |
1938 | scif_node_wake_up_nack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1939 | { | |
1940 | scif_dev[msg->payload[0]].sd_wait_status = OP_FAILED; | |
1941 | wake_up(&scif_dev[msg->payload[0]].sd_wq); | |
1942 | } | |
1943 | ||
1944 | /* | |
1945 | * scif_node_remove: Handle SCIF_NODE_REMOVE message | |
1946 | * @msg: Interrupt message | |
1947 | * | |
1948 | * Handle node removal. | |
1949 | */ | |
1950 | static __always_inline void | |
1951 | scif_node_remove(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1952 | { | |
1953 | msg->payload[0] = micscif_handle_remove_node(msg->payload[0], msg->payload[1]); | |
1954 | msg->uop = SCIF_NODE_REMOVE_ACK; | |
1955 | msg->src.node = ms_info.mi_nodeid; | |
1956 | micscif_nodeqp_send(&scif_dev[SCIF_HOST_NODE], msg, NULL); | |
1957 | } | |
1958 | ||
1959 | #ifndef _MIC_SCIF_ | |
1960 | /* | |
1961 | * scif_node_remove_ack: Handle SCIF_NODE_REMOVE_ACK message | |
1962 | * @msg: Interrupt message | |
1963 | * | |
1964 | * The peer has acked a SCIF_NODE_REMOVE message. | |
1965 | */ | |
1966 | static __always_inline void | |
1967 | scif_node_remove_ack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
1968 | { | |
1969 | bool ack_is_current = true; | |
1970 | int orig_node = (int)msg->payload[3]; | |
1971 | ||
1972 | if ((msg->payload[1] << 32) == DISCONN_TYPE_POWER_MGMT) { | |
1973 | if (msg->payload[2] != atomic_long_read(&ms_info.mi_unique_msgid)) | |
1974 | ack_is_current = false; | |
1975 | } | |
1976 | ||
1977 | if (ack_is_current) { | |
1978 | mic_ctx_t *mic_ctx = get_per_dev_ctx(orig_node - 1); | |
1979 | if (!mic_ctx) { | |
1980 | printk(KERN_ERR "%s %d mic_ctx %p orig_node %d\n", | |
1981 | __func__, __LINE__, mic_ctx, orig_node); | |
1982 | return; | |
1983 | } | |
1984 | ||
1985 | if (msg->payload[0]) { | |
1986 | pr_debug("%s failed to get remove ack from node id %d", __func__, msg->src.node); | |
1987 | ms_info.mi_disconnect_status = OP_FAILED; | |
1988 | } | |
1989 | ||
1990 | atomic_inc(&mic_ctx->disconn_rescnt); | |
1991 | wake_up(&ms_info.mi_disconn_wq); | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * scif_node_create_ack: Handle SCIF_NODE_CREATE_DEP message | |
1997 | * @msg: Interrupt message | |
1998 | * | |
1999 | * Notification about a new SCIF dependency between two nodes. | |
2000 | */ | |
2001 | static __always_inline void | |
2002 | scif_node_create_dep(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2003 | { | |
2004 | uint32_t src_node = msg->src.node; | |
2005 | uint32_t dst_node = (uint32_t)msg->payload[0]; | |
2006 | /* | |
2007 | * Host driver updates dependency graph. | |
2008 | * src_node created dependency on dst_node | |
2009 | * src_node -> dst_node | |
2010 | */ | |
2011 | micscif_set_nodedep(src_node, dst_node, DEP_STATE_DEPENDENT); | |
2012 | } | |
2013 | ||
2014 | /* | |
2015 | * scif_node_destroy_ack: Handle SCIF_NODE_DESTROY_DEP message | |
2016 | * @msg: Interrupt message | |
2017 | * | |
2018 | * Notification about tearing down an existing SCIF dependency | |
2019 | * between two nodes. | |
2020 | */ | |
2021 | static __always_inline void | |
2022 | scif_node_destroy_dep(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2023 | { | |
2024 | uint32_t src_node = msg->src.node; | |
2025 | uint32_t dst_node = (uint32_t)msg->payload[0]; | |
2026 | /* | |
2027 | * Host driver updates dependency graph. | |
2028 | * src_node removed dependency on dst_node | |
2029 | */ | |
2030 | micscif_set_nodedep(src_node, dst_node, DEP_STATE_NOT_DEPENDENT); | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | * scif_node_wake_up: Handle SCIF_NODE_WAKE_UP message | |
2035 | * @msg: Interrupt message | |
2036 | * | |
2037 | * The host has received a request to wake up a remote node. | |
2038 | */ | |
2039 | static __always_inline void | |
2040 | scif_node_wake_up(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2041 | { | |
2042 | /* | |
2043 | * Host Driver now needs to wake up the remote node | |
2044 | * available in msg->payload[0]. | |
2045 | */ | |
2046 | uint32_t ret = 0; | |
2047 | ret = micscif_connect_node((uint32_t)msg->payload[0], false); | |
2048 | ||
2049 | if(!ret) { | |
2050 | msg->uop = SCIF_NODE_WAKE_UP_ACK; | |
2051 | micscif_update_p2p_state((uint32_t)msg->payload[0], | |
2052 | msg->src.node, SCIFDEV_RUNNING); | |
2053 | } else { | |
2054 | msg->uop = SCIF_NODE_WAKE_UP_NACK; | |
2055 | } | |
2056 | micscif_nodeqp_send(&scif_dev[msg->src.node], msg, NULL); | |
2057 | } | |
2058 | #endif | |
2059 | ||
2060 | #ifdef _MIC_SCIF_ | |
2061 | static __always_inline void | |
2062 | scif_node_alive_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2063 | { | |
2064 | msg->uop = SCIF_NODE_ALIVE_ACK; | |
2065 | msg->src.node = ms_info.mi_nodeid; | |
2066 | msg->dst.node = SCIF_HOST_NODE; | |
2067 | micscif_nodeqp_send(&scif_dev[SCIF_HOST_NODE], msg, NULL); | |
2068 | pr_debug("node alive ack sent from node %d oops_in_progress %d\n", | |
2069 | ms_info.mi_nodeid, oops_in_progress); | |
2070 | } | |
2071 | #else | |
2072 | static __always_inline void | |
2073 | scif_node_alive_ack(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2074 | { | |
2075 | pr_debug("node alive ack received from node %d\n", msg->src.node); | |
2076 | atomic_set(&scif_dev[msg->src.node].sd_node_alive, 1); | |
2077 | wake_up(&scifdev->sd_watchdog_wq); | |
2078 | } | |
2079 | #endif | |
2080 | ||
2081 | ||
2082 | #ifdef _MIC_SCIF_ | |
2083 | static __always_inline void | |
2084 | _scif_proxy_dma(struct micscif_dev *scifdev, struct nodemsg *msg, int flags) | |
2085 | { | |
2086 | struct endpt *ep = (struct endpt *)msg->payload[0]; | |
2087 | off_t loffset = msg->payload[1]; | |
2088 | off_t roffset = msg->payload[2]; | |
2089 | size_t len = msg->payload[3]; | |
2090 | struct dma_channel *chan = ep->rma_info.dma_chan; | |
2091 | struct endpt_rma_info *rma = &ep->rma_info; | |
2092 | int err = __scif_writeto(ep, loffset, len, roffset, flags); | |
2093 | ||
2094 | if (!err && rma->proxy_dma_peer_phys && | |
2095 | !request_dma_channel(chan)) { | |
2096 | do_status_update(chan, rma->proxy_dma_peer_phys, OP_COMPLETED); | |
2097 | free_dma_channel(chan); | |
2098 | } | |
2099 | if (!rma->proxy_dma_peer_phys) | |
2100 | /* The proxy DMA physical address should have been set up? */ | |
2101 | WARN_ON(1); | |
2102 | } | |
2103 | ||
2104 | /** | |
2105 | * scif_proxy_dma: Handle SCIF_PROXY_DMA request. | |
2106 | * @msg: Interrupt message | |
2107 | * | |
2108 | * The peer has requested a Proxy DMA. | |
2109 | */ | |
2110 | static __always_inline void | |
2111 | scif_proxy_dma(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2112 | { | |
2113 | _scif_proxy_dma(scifdev, msg, 0x0); | |
2114 | } | |
2115 | ||
2116 | /** | |
2117 | * scif_proxy_ordered_dma: Handle SCIF_PROXY_ORDERED_DMA request. | |
2118 | * @msg: Interrupt message | |
2119 | * | |
2120 | * The peer has requested an ordered Proxy DMA. | |
2121 | */ | |
2122 | static __always_inline void | |
2123 | scif_proxy_ordered_dma(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2124 | { | |
2125 | _scif_proxy_dma(scifdev, msg, SCIF_RMA_ORDERED); | |
2126 | } | |
2127 | #endif | |
2128 | ||
2129 | #ifndef _MIC_SCIF_ | |
2130 | /** | |
2131 | * scif_node_connect: Respond to SCIF_NODE_CONNECT interrupt message | |
2132 | * @msg: Interrupt message | |
2133 | * | |
2134 | * Connect the src and dst node by setting up the p2p connection | |
2135 | * between them. Host here acts like a proxy. | |
2136 | */ | |
2137 | static __always_inline void | |
2138 | scif_node_connect_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2139 | { | |
2140 | struct micscif_dev *dev_j = scifdev; | |
2141 | struct micscif_dev *dev_i = NULL; | |
2142 | struct scif_p2p_info *p2p_ij = NULL; /* bus addr for j from i */ | |
2143 | struct scif_p2p_info *p2p_ji = NULL; /* bus addr for i from j */ | |
2144 | struct scif_p2p_info *p2p; | |
2145 | struct list_head *pos, *tmp; | |
2146 | uint32_t bid = (uint32_t)msg->payload[0]; | |
2147 | int err; | |
2148 | uint64_t tmppayload; | |
2149 | ||
2150 | pr_debug("%s:%d SCIF_NODE_CONNECT from %d connecting to %d \n", | |
2151 | __func__, __LINE__, scifdev->sd_node, bid); | |
2152 | ||
2153 | mutex_lock(&ms_info.mi_conflock); | |
2154 | if (bid < 1 || bid > ms_info.mi_maxid) { | |
2155 | printk(KERN_ERR "%s %d unknown bid %d\n", __func__, __LINE__, bid); | |
2156 | goto nack; | |
2157 | } | |
2158 | ||
2159 | dev_i = &scif_dev[bid]; | |
2160 | mutex_unlock(&ms_info.mi_conflock); | |
2161 | micscif_inc_node_refcnt(dev_i, 1); | |
2162 | mutex_lock(&ms_info.mi_conflock); | |
2163 | ||
2164 | if (dev_i->sd_state != SCIFDEV_RUNNING) | |
2165 | goto ref_nack; | |
2166 | ||
2167 | /* | |
2168 | * If the p2p connection is already setup or in the process of setting up | |
2169 | * then just ignore this request. The requested node will get informed | |
2170 | * by SCIF_NODE_ADD_ACK or SCIF_NODE_ADD_NACK | |
2171 | */ | |
2172 | if (!list_empty(&dev_i->sd_p2p)) { | |
2173 | list_for_each_safe(pos, tmp, &dev_i->sd_p2p) { | |
2174 | p2p = list_entry(pos, struct scif_p2p_info, | |
2175 | ppi_list); | |
2176 | if (p2p->ppi_peer_id == dev_j->sd_node) { | |
2177 | mutex_unlock(&ms_info.mi_conflock); | |
2178 | micscif_dec_node_refcnt(dev_i, 1); | |
2179 | return; | |
2180 | } | |
2181 | } | |
2182 | } | |
2183 | ||
2184 | p2p_ij = init_p2p_info(dev_i, dev_j); | |
2185 | p2p_ji = init_p2p_info(dev_j, dev_i); | |
2186 | ||
2187 | list_add_tail(&p2p_ij->ppi_list, &dev_i->sd_p2p); | |
2188 | list_add_tail(&p2p_ji->ppi_list, &dev_j->sd_p2p); | |
2189 | ||
2190 | /* Send a SCIF_NODE_ADD to dev_i, pass it its bus address | |
2191 | * as seen from dev_j | |
2192 | */ | |
2193 | msg->uop = SCIF_NODE_ADD; | |
2194 | msg->src.node = dev_j->sd_node; | |
2195 | msg->dst.node = dev_i->sd_node; | |
2196 | ||
2197 | p2p_ji->ppi_mic_addr[PPI_APER] = mic_map(msg->src.node - 1, | |
2198 | p2p_ji->ppi_pa[PPI_APER], | |
2199 | p2p_ji->ppi_len[PPI_APER] << PAGE_SHIFT); | |
2200 | msg->payload[0] = p2p_ji->ppi_mic_addr[PPI_APER]; | |
2201 | ||
2202 | /* addresses for node j */ | |
2203 | p2p_ij->ppi_mic_addr[PPI_MMIO] = mic_map(msg->dst.node - 1, | |
2204 | p2p_ij->ppi_pa[PPI_MMIO], | |
2205 | p2p_ij->ppi_len[PPI_MMIO] << PAGE_SHIFT); | |
2206 | msg->payload[1] = p2p_ij->ppi_mic_addr[PPI_MMIO]; | |
2207 | ||
2208 | p2p_ij->ppi_mic_addr[PPI_APER] = mic_map(msg->dst.node - 1, | |
2209 | p2p_ij->ppi_pa[PPI_APER], | |
2210 | p2p_ij->ppi_len[PPI_APER] << PAGE_SHIFT); | |
2211 | msg->payload[2] = p2p_ij->ppi_mic_addr[PPI_APER]; | |
2212 | ||
2213 | msg->payload[3] = p2p_ij->ppi_len[PPI_APER] << PAGE_SHIFT; | |
2214 | ||
2215 | if ((err = micscif_nodeqp_send(dev_i, msg, NULL))) { | |
2216 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
2217 | goto ref_nack; | |
2218 | } | |
2219 | ||
2220 | /* Same as above but to dev_j */ | |
2221 | msg->uop = SCIF_NODE_ADD; | |
2222 | msg->src.node = dev_i->sd_node; | |
2223 | msg->dst.node = dev_j->sd_node; | |
2224 | ||
2225 | tmppayload = msg->payload[0]; | |
2226 | msg->payload[0] = msg->payload[2]; | |
2227 | msg->payload[2] = tmppayload; | |
2228 | ||
2229 | p2p_ji->ppi_mic_addr[PPI_MMIO] = mic_map(msg->dst.node - 1, p2p_ji->ppi_pa[PPI_MMIO], | |
2230 | p2p_ji->ppi_len[PPI_MMIO] << PAGE_SHIFT); | |
2231 | msg->payload[1] = p2p_ji->ppi_mic_addr[PPI_MMIO]; | |
2232 | msg->payload[3] = p2p_ji->ppi_len[PPI_APER] << PAGE_SHIFT; | |
2233 | ||
2234 | if ((err = micscif_nodeqp_send(dev_j, msg, NULL))) { | |
2235 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
2236 | goto ref_nack; | |
2237 | } | |
2238 | ||
2239 | mutex_unlock(&ms_info.mi_conflock); | |
2240 | micscif_dec_node_refcnt(dev_i, 1); | |
2241 | return; | |
2242 | ref_nack: | |
2243 | micscif_dec_node_refcnt(dev_i, 1); | |
2244 | nack: | |
2245 | mutex_unlock(&ms_info.mi_conflock); | |
2246 | msg->uop = SCIF_NODE_CONNECT_NACK; | |
2247 | msg->dst.node = dev_j->sd_node; | |
2248 | msg->payload[0] = bid; | |
2249 | if ((err = micscif_nodeqp_send(dev_j, msg, NULL))) | |
2250 | printk(KERN_ERR "%s %d error %d\n", __func__, __LINE__, err); | |
2251 | } | |
2252 | #endif /* SCIF */ | |
2253 | ||
2254 | #ifdef _MIC_SCIF_ | |
2255 | /** | |
2256 | * scif_node_connect_nack_resp: Respond to SCIF_NODE_CONNECT_NACK interrupt message | |
2257 | * @msg: Interrupt message | |
2258 | * | |
2259 | * Tell the node that initiated SCIF_NODE_CONNECT earlier has failed. | |
2260 | */ | |
2261 | static __always_inline void | |
2262 | scif_node_connect_nack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2263 | { | |
2264 | struct micscif_dev *peerdev; | |
2265 | unsigned int bid = msg->payload[0]; | |
2266 | ||
2267 | if (bid > MAX_BOARD_SUPPORTED) { | |
2268 | printk(KERN_ERR "recieved a nack for invalid bid %d\n", bid); | |
2269 | WARN_ON(1); | |
2270 | return; | |
2271 | } | |
2272 | ||
2273 | peerdev = &scif_dev[bid]; | |
2274 | mutex_lock(&peerdev->sd_lock); | |
2275 | peerdev->sd_state = SCIFDEV_NOTPRESENT; | |
2276 | mutex_unlock(&peerdev->sd_lock); | |
2277 | wake_up(&peerdev->sd_p2p_wq); | |
2278 | } | |
2279 | #endif | |
2280 | ||
2281 | /** | |
2282 | * scif_node_add_nack_resp: Respond to SCIF_NODE_ADD_NACK interrupt message | |
2283 | * @msg: Interrupt message | |
2284 | * | |
2285 | * SCIF_NODE_ADD failed, so inform the waiting wq. | |
2286 | */ | |
2287 | static __always_inline void | |
2288 | scif_node_add_nack_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2289 | { | |
2290 | #ifndef _MIC_SCIF_ | |
2291 | struct micscif_dev *dst_dev = &scif_dev[msg->dst.node]; | |
2292 | pr_debug("SCIF_NODE_ADD_NACK recieved from %d \n", scifdev->sd_node); | |
2293 | micscif_inc_node_refcnt(dst_dev, 1); | |
2294 | micscif_nodeqp_send(dst_dev, msg, NULL); | |
2295 | micscif_dec_node_refcnt(dst_dev, 1); | |
2296 | #else | |
2297 | struct micscif_dev *peerdev; | |
2298 | ||
2299 | peerdev = &scif_dev[msg->src.node]; | |
2300 | ||
2301 | if (peerdev->sd_state == SCIFDEV_NOTPRESENT) | |
2302 | return; | |
2303 | ||
2304 | mutex_lock(&peerdev->sd_lock); | |
2305 | peerdev->sd_state = SCIFDEV_NOTPRESENT; | |
2306 | mutex_unlock(&peerdev->sd_lock); | |
2307 | wake_up(&peerdev->sd_p2p_wq); | |
2308 | #endif | |
2309 | } | |
2310 | ||
2311 | /** | |
2312 | * scif_get_node_info_resp: Respond to SCIF_GET_NODE_INFO interrupt message | |
2313 | * @msg: Interrupt message | |
2314 | * | |
2315 | * Retrieve node info i.e maxid, total and node mask from the host. | |
2316 | */ | |
2317 | static __always_inline void | |
2318 | scif_get_node_info_resp(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2319 | { | |
2320 | #ifdef _MIC_SCIF_ | |
2321 | struct get_node_info *node_info = (struct get_node_info *)msg->payload[3]; | |
2322 | ||
2323 | mutex_lock(&ms_info.mi_conflock); | |
2324 | ms_info.mi_mask = msg->payload[0]; | |
2325 | ms_info.mi_maxid = msg->payload[1]; | |
2326 | ms_info.mi_total = msg->payload[2]; | |
2327 | ||
2328 | node_info->state = OP_COMPLETED; | |
2329 | wake_up(&node_info->wq); | |
2330 | mutex_unlock(&ms_info.mi_conflock); | |
2331 | #else | |
2332 | swap(msg->dst.node, msg->src.node); | |
2333 | mutex_lock(&ms_info.mi_conflock); | |
2334 | msg->payload[0] = ms_info.mi_mask; | |
2335 | msg->payload[1] = ms_info.mi_maxid; | |
2336 | msg->payload[2] = ms_info.mi_total; | |
2337 | mutex_unlock(&ms_info.mi_conflock); | |
2338 | ||
2339 | if (micscif_nodeqp_send(scifdev, msg, NULL)) | |
2340 | printk(KERN_ERR "%s %d error \n", __func__, __LINE__); | |
2341 | #endif | |
2342 | } | |
2343 | ||
2344 | #ifdef ENABLE_TEST | |
2345 | static void | |
2346 | scif_test(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2347 | { | |
2348 | if (msg->payload[0] != scifdev->count) { | |
2349 | printk(KERN_ERR "Con fail: payload == %llx\n", msg->payload[0]); | |
2350 | scifdev->test_done = -1; | |
2351 | } else if (scifdev->count == TEST_LOOP) { | |
2352 | pr_debug("Test success state %d!\n", scifdev->sd_state); | |
2353 | scifdev->test_done = 1; | |
2354 | } | |
2355 | ||
2356 | if (scifdev->test_done != 0) { | |
2357 | while (scifdev->test_done != 2) { | |
2358 | cpu_relax(); | |
2359 | schedule(); | |
2360 | } | |
2361 | ||
2362 | destroy_workqueue(scifdev->producer); | |
2363 | destroy_workqueue(scifdev->consumer); | |
2364 | pr_debug("Destroyed workqueue state %d!\n", scifdev->sd_state); | |
2365 | } | |
2366 | scifdev->count++; | |
2367 | } | |
2368 | #endif /* ENABLE_TEST */ | |
2369 | ||
2370 | static void | |
2371 | scif_msg_unknown(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2372 | { | |
2373 | /* Bogus Node Qp Message? */ | |
2374 | printk(KERN_ERR "Unknown message 0x%xn scifdev->sd_state 0x%x " | |
2375 | "scifdev->sd_node 0x%x\n", | |
2376 | msg->uop, scifdev->sd_state, scifdev->sd_node); | |
2377 | BUG_ON(1); | |
2378 | } | |
2379 | ||
2380 | #ifdef _MIC_SCIF_ | |
2381 | static void | |
2382 | smpt_set(struct micscif_dev *scifdev, struct nodemsg *msg) | |
2383 | { | |
2384 | printk("msd recvd : smpt add\n"); | |
2385 | printk("dma_addr = 0x%llX, entry = 0x%llX\n", msg->payload[0], msg->payload[1]); | |
2386 | mic_smpt_set(scif_dev->mm_sbox, msg->payload[0], msg->payload[1]); | |
2387 | } | |
2388 | #endif | |
2389 | ||
2390 | void (*scif_intr_func[SCIF_MAX_MSG + 1])(struct micscif_dev *, struct nodemsg *msg) = { | |
2391 | scif_msg_unknown, // Error | |
2392 | scif_init_resp, // SCIF_INIT | |
2393 | scif_exit_resp, // SCIF_EXIT | |
2394 | scif_nodeadd_resp, // SCIF_NODE_ADD | |
2395 | scif_nodeaddack_resp, // SCIF_NODE_ADD_ACK | |
2396 | scif_cnctreq_resp, // SCIF_CNCT_REQ | |
2397 | scif_cnctgnt_resp, // SCIF_CNCT_GNT | |
2398 | scif_cnctgntack_resp, // SCIF_CNCT_GNTACK | |
2399 | scif_cnctgntnack_resp, // SCIF_CNCT_GNTNACK | |
2400 | scif_cnctrej_resp, // SCIF_CNCT_REJ | |
2401 | scif_cnctterm_resp, // SCIF_CNCT_TERM 10 | |
2402 | scif_termack_resp, // SCIF_TERM_ACK | |
2403 | scif_discnct_resp, // SCIF_DISCNCT | |
2404 | scif_discntack_resp, // SCIF_DISCNT_ACK | |
2405 | scif_recv_register, // SCIF_REGISTER | |
2406 | scif_recv_register_ack, // SCIF_REGISTER_ACK | |
2407 | scif_recv_register_nack, // SCIF_REGISTER_NACK | |
2408 | scif_recv_unregister, // SCIF_UNREGISTER | |
2409 | scif_recv_unregister_ack, // SCIF_UNREGISTER_ACK | |
2410 | scif_recv_unregister_nack, // SCIF_UNREGISTER_NACK | |
2411 | scif_alloc_req, // SCIF_ALLOC_REQ 20 | |
2412 | scif_alloc_gnt_rej, // SCIF_ALLOC_GNT | |
2413 | scif_alloc_gnt_rej, // SCIF_ALLOC_REJ | |
2414 | scif_free_phys, // SCIF_FREE_PHYS | |
2415 | scif_free_virt, // SCIF_FREE_VIRT | |
2416 | scif_clientsend_resp, // SCIF_CLIENT_SENT | |
2417 | scif_clientrcvd_resp, // SCIF_CLIENT_RCVD | |
2418 | scif_recv_munmap, // SCIF_MUNMAP | |
2419 | scif_recv_mark, // SCIF_MARK | |
2420 | scif_recv_mark_resp, // SCIF_MARK_ACK | |
2421 | scif_recv_mark_resp, // SCIF_MARK_NACK 30 | |
2422 | scif_recv_wait, // SCIF_WAIT | |
2423 | scif_recv_wait_resp, // SCIF_WAIT_ACK | |
2424 | scif_recv_wait_resp, // SCIF_WAIT_NACK | |
2425 | scif_recv_signal_local, // SCIF_SIG_LOCAL | |
2426 | scif_recv_signal_remote, // SCIF_SIG_REMOTE | |
2427 | scif_recv_signal_resp, // SCIF_SIG_ACK | |
2428 | scif_recv_signal_resp, // SCIF_SIG_NACK | |
2429 | #ifdef _MIC_SCIF_ | |
2430 | scif_msg_unknown, | |
2431 | scif_msg_unknown, | |
2432 | scif_msg_unknown, | |
2433 | scif_msg_unknown, | |
2434 | scif_msg_unknown, // SCIF_NODE_CREATE_DEP Not on card | |
2435 | scif_msg_unknown, // SCIF_NODE_DESTROY_DEP Not on card | |
2436 | #else | |
2437 | scif_msg_unknown, | |
2438 | scif_msg_unknown, | |
2439 | scif_msg_unknown, | |
2440 | scif_msg_unknown, | |
2441 | scif_node_create_dep, // SCIF_NODE_CREATE_DEP | |
2442 | scif_node_destroy_dep, // SCIF_NODE_DESTROY_DEP | |
2443 | #endif | |
2444 | scif_node_remove, // SCIF_NODE_REMOVE | |
2445 | #ifdef _MIC_SCIF_ | |
2446 | scif_msg_unknown, // SCIF_NODE_REMOVE_ACK Not on card | |
2447 | scif_msg_unknown, // SCIF_NODE_WAKE_UP Not on card | |
2448 | #else | |
2449 | scif_node_remove_ack, // SCIF_NODE_REMOVE_ACK | |
2450 | scif_node_wake_up, // SCIF_NODE_WAKE_UP | |
2451 | #endif | |
2452 | scif_node_wake_up_ack, // SCIF_NODE_WAKE_UP_ACK | |
2453 | scif_node_wake_up_nack, // SCIF_NODE_WAKE_UP_NACK | |
2454 | #ifdef _MIC_SCIF_ | |
2455 | scif_node_alive_resp, // SCIF_NODE_ALIVE | |
2456 | scif_msg_unknown, // SCIF_NODE_ALIVE_ACK not on card | |
2457 | smpt_set, // SMPT_SET | |
2458 | #else | |
2459 | scif_msg_unknown, // SCIF_NODE_ALIVE not on Host | |
2460 | scif_node_alive_ack, // SCIF_NODE_ALIVE_ACK | |
2461 | scif_msg_unknown, // SCIF_NODE_ALIVE not on Host | |
2462 | #endif | |
2463 | scif_msg_unknown, | |
2464 | scif_msg_unknown, | |
2465 | scif_msg_unknown, | |
2466 | scif_msg_unknown, | |
2467 | #ifdef _MIC_SCIF_ | |
2468 | scif_proxy_dma, // SCIF_PROXY_DMA only for MIC | |
2469 | scif_proxy_ordered_dma, // SCIF_PROXY_ORDERED_DMA only for MIC | |
2470 | #else | |
2471 | scif_msg_unknown, | |
2472 | scif_msg_unknown, | |
2473 | #endif | |
2474 | #ifdef _MIC_SCIF_ | |
2475 | scif_msg_unknown, | |
2476 | scif_node_connect_nack_resp, //SCIF_NODE_CONNECT_NACK | |
2477 | #else | |
2478 | scif_node_connect_resp, //SCIF_NODE_CONNECT | |
2479 | scif_msg_unknown, | |
2480 | #endif | |
2481 | scif_node_add_nack_resp, //SCIF_NODE_ADD_NACK | |
2482 | scif_get_node_info_resp, //SCIF_GET_NODE_INFO | |
2483 | #ifdef ENABLE_TEST | |
2484 | scif_test // SCIF_TEST | |
2485 | #else | |
2486 | scif_msg_unknown | |
2487 | #endif | |
2488 | }; | |
2489 | ||
2490 | /** | |
2491 | * scif_nodeqp_msg_hander() - Common handler for node messages | |
2492 | * @scifdev: Remote device to respond to | |
2493 | * @qp: Remote memory pointer | |
2494 | * @msg: The message to be handled. | |
2495 | * | |
2496 | * This routine calls the appriate routine to handle a Node Qp message receipt. | |
2497 | */ | |
2498 | int micscif_max_msg_id = SCIF_MAX_MSG; | |
2499 | ||
2500 | static void | |
2501 | micscif_nodeqp_msg_handler(struct micscif_dev *scifdev, struct micscif_qp *qp, struct nodemsg *msg) | |
2502 | { | |
2503 | micscif_display_message(scifdev, msg, "Rcvd"); | |
2504 | ||
2505 | if (msg->uop > (uint32_t)micscif_max_msg_id) { | |
2506 | /* Bogus Node Qp Message? */ | |
2507 | printk(KERN_ERR "Unknown message 0x%xn scifdev->sd_state 0x%x " | |
2508 | "scifdev->sd_node 0x%x\n", | |
2509 | msg->uop, scifdev->sd_state, scifdev->sd_node); | |
2510 | BUG_ON(1); | |
2511 | } | |
2512 | ||
2513 | scif_intr_func[msg->uop](scifdev, msg); | |
2514 | } | |
2515 | ||
2516 | /** | |
2517 | * scif_nodeqp_intrhander() - Interrupt handler for node messages | |
2518 | * @scifdev: Remote device to respond to | |
2519 | * @qp: Remote memory pointer | |
2520 | * | |
2521 | * This routine is triggered by the interrupt mechanism. It reads | |
2522 | * messages from the node queue RB and calls the Node QP Message handling | |
2523 | * routine. | |
2524 | */ | |
2525 | int | |
2526 | micscif_nodeqp_intrhandler(struct micscif_dev *scifdev, struct micscif_qp *qp) | |
2527 | { | |
2528 | struct nodemsg msg; | |
2529 | int read_size; | |
2530 | ||
2531 | do { | |
2532 | #ifndef _MIC_SCIF_ | |
2533 | if (qp->blast) { | |
2534 | scif_wakeup_ep(SCIF_WAKE_UP_RECV); | |
2535 | qp->blast = 0; | |
2536 | } | |
2537 | #endif | |
2538 | if (SCIFDEV_STOPPED == scifdev->sd_state) | |
2539 | return 0; | |
2540 | read_size = micscif_rb_get_next(&qp->inbound_q, &msg, | |
2541 | sizeof(msg)); | |
2542 | /* Stop handling messages if an oops is in progress */ | |
2543 | if (read_size != sizeof(msg) || oops_in_progress) | |
2544 | break; | |
2545 | #ifndef _MIC_SCIF_ | |
2546 | atomic_set(&scifdev->sd_node_alive, 1); | |
2547 | #endif | |
2548 | ||
2549 | micscif_inc_node_refcnt(scifdev, 1); | |
2550 | micscif_nodeqp_msg_handler(scifdev, qp, &msg); | |
2551 | /* | |
2552 | * The reference count is reset to SCIF_NODE_IDLE | |
2553 | * during scif device cleanup so decrementing the | |
2554 | * reference count further is not required. | |
2555 | */ | |
2556 | if (SCIFDEV_INIT == scifdev->sd_state) | |
2557 | return 0; | |
2558 | if (SCIFDEV_STOPPED == scifdev->sd_state) { | |
2559 | micscif_dec_node_refcnt(scifdev, 1); | |
2560 | return 0; | |
2561 | } | |
2562 | micscif_rb_update_read_ptr(&qp->inbound_q); | |
2563 | micscif_dec_node_refcnt(scifdev, 1); | |
2564 | } while (read_size == sizeof(msg)); | |
2565 | #ifdef _MIC_SCIF_ | |
2566 | /* | |
2567 | * Keep polling the Node QP RB in case there are active SCIF | |
2568 | * P2P connections to provide better Node QP responsiveness | |
2569 | * in anticipation of P2P Proxy DMA requests for performance. | |
2570 | */ | |
2571 | if (scifdev->sd_proxy_dma_reads && | |
2572 | scifdev->num_active_conn && | |
2573 | SCIFDEV_STOPPED != scifdev->sd_state) { | |
2574 | queue_work(scifdev->sd_intr_wq, &scifdev->sd_intr_bh); | |
2575 | schedule(); | |
2576 | } | |
2577 | #endif | |
2578 | return read_size; | |
2579 | } | |
2580 | ||
2581 | /** | |
2582 | * micscif_loopb_wq_handler - Loopback Workqueue Handler. | |
2583 | * @work: loop back work | |
2584 | * | |
2585 | * This work queue routine is invoked by the loopback work queue handler. | |
2586 | * It grabs the recv lock, dequeues any available messages from the head | |
2587 | * of the loopback message list, calls the node QP message handler, | |
2588 | * waits for it to return, then frees up this message and dequeues more | |
2589 | * elements of the list if available. | |
2590 | */ | |
2591 | static void micscif_loopb_wq_handler(struct work_struct *work) | |
2592 | { | |
2593 | struct micscif_dev *scifdev = | |
2594 | container_of(work, struct micscif_dev, sd_loopb_work); | |
2595 | struct micscif_qp *qp = micscif_nodeqp_nextmsg(scifdev); | |
2596 | struct loopb_msg *msg; | |
2597 | ||
2598 | do { | |
2599 | msg = NULL; | |
2600 | spin_lock(&qp->qp_recv_lock); | |
2601 | if (!list_empty(&scifdev->sd_loopb_recv_q)) { | |
2602 | msg = list_first_entry(&scifdev->sd_loopb_recv_q, | |
2603 | struct loopb_msg, list_member); | |
2604 | list_del(&msg->list_member); | |
2605 | } | |
2606 | spin_unlock(&qp->qp_recv_lock); | |
2607 | ||
2608 | if (msg) { | |
2609 | micscif_nodeqp_msg_handler(scifdev, qp, &msg->msg); | |
2610 | kfree(msg); | |
2611 | } | |
2612 | } while (msg); | |
2613 | } | |
2614 | ||
2615 | /** | |
2616 | * micscif_loopb_msg_handler() - Workqueue handler for loopback messages. | |
2617 | * @scifdev: SCIF device | |
2618 | * @qp: Queue pair. | |
2619 | * | |
2620 | * This work queue routine is triggered when a loopback message is received. | |
2621 | * | |
2622 | * We need special handling for receiving Node Qp messages on a loopback SCIF | |
2623 | * device via two workqueues for receiving messages. | |
2624 | * | |
2625 | * The reason we need the extra workqueue which is not required with *normal* | |
2626 | * non-loopback SCIF devices is the potential classic deadlock described below: | |
2627 | * | |
2628 | * Thread A tries to send a message on a loopback SCIF devide and blocks since | |
2629 | * there is no space in the RB while it has the qp_send_lock held or another | |
2630 | * lock called lock X for example. | |
2631 | * | |
2632 | * Thread B: The Loopback Node QP message receive workqueue receives the message | |
2633 | * and tries to send a message (eg an ACK) to the loopback SCIF device. It tries | |
2634 | * to grab the send lock again or lock X and deadlocks with Thread A. The RB | |
2635 | * cannot be drained any further due to this classic deadlock. | |
2636 | * | |
2637 | * In order to avoid deadlocks as mentioned above we have an extra level of | |
2638 | * indirection achieved by having two workqueues. | |
2639 | * 1) The first workqueue whose handler is micscif_loopb_msg_handler reads | |
2640 | * messages from the Node QP RB, adds them to a list and queues work for the | |
2641 | * second workqueue. | |
2642 | * | |
2643 | * 2) The second workqueue whose handler is micscif_loopb_wq_handler dequeues | |
2644 | * messages from the list, handles them, frees up the memory and dequeues | |
2645 | * more elements from the list if possible. | |
2646 | */ | |
2647 | int | |
2648 | micscif_loopb_msg_handler(struct micscif_dev *scifdev, struct micscif_qp *qp) | |
2649 | { | |
2650 | int read_size; | |
2651 | struct loopb_msg *msg; | |
2652 | ||
2653 | do { | |
2654 | if (!(msg = kmalloc(sizeof(struct loopb_msg), GFP_KERNEL))) { | |
2655 | printk(KERN_ERR "%s %d ENOMEM\n", __func__, __LINE__); | |
2656 | return -ENOMEM; | |
2657 | } | |
2658 | ||
2659 | read_size = micscif_rb_get_next(&qp->inbound_q, &msg->msg, | |
2660 | sizeof(struct nodemsg)); | |
2661 | ||
2662 | if (read_size != sizeof(struct nodemsg)) { | |
2663 | kfree(msg); | |
2664 | micscif_rb_update_read_ptr(&qp->inbound_q); | |
2665 | break; | |
2666 | } | |
2667 | ||
2668 | spin_lock(&qp->qp_recv_lock); | |
2669 | list_add_tail(&msg->list_member, &scifdev->sd_loopb_recv_q); | |
2670 | spin_unlock(&qp->qp_recv_lock); | |
2671 | queue_work(scifdev->sd_loopb_wq, &scifdev->sd_loopb_work); | |
2672 | micscif_rb_update_read_ptr(&qp->inbound_q); | |
2673 | } while (read_size == sizeof(struct nodemsg)); | |
2674 | return read_size; | |
2675 | } | |
2676 | ||
2677 | /** | |
2678 | * micscif_setup_loopback_qp - One time setup work for Loopback Node Qp. | |
2679 | * @scifdev: SCIF device | |
2680 | * | |
2681 | * Sets up the required loopback workqueues, queue pairs, ring buffers | |
2682 | * and also tests out the Queue Pairs. | |
2683 | */ | |
2684 | int micscif_setup_loopback_qp(struct micscif_dev *scifdev) | |
2685 | { | |
2686 | int err = 0; | |
2687 | void *local_q; | |
2688 | struct micscif_qp *qp; | |
2689 | ||
2690 | /* Set up the work queues */ | |
2691 | if ((err = micscif_setup_interrupts(scifdev))) | |
2692 | goto error; | |
2693 | ||
2694 | INIT_LIST_HEAD(&scifdev->sd_loopb_recv_q); | |
2695 | snprintf(scifdev->sd_loopb_wqname, sizeof(scifdev->sd_loopb_wqname), | |
2696 | "SCIF LOOPB %d", scifdev->sd_node); | |
2697 | if (!(scifdev->sd_loopb_wq = | |
2698 | __mic_create_singlethread_workqueue(scifdev->sd_loopb_wqname))){ | |
2699 | err = -ENOMEM; | |
2700 | goto destroy_intr_wq; | |
2701 | } | |
2702 | INIT_WORK(&scifdev->sd_loopb_work, micscif_loopb_wq_handler); | |
2703 | /* Allocate Self Qpair */ | |
2704 | scifdev->n_qpairs = 1; | |
2705 | scifdev->qpairs = (struct micscif_qp *)kzalloc(sizeof(struct micscif_qp), GFP_KERNEL); | |
2706 | if (!scifdev->qpairs) { | |
2707 | printk(KERN_ERR "Node QP Allocation failed\n"); | |
2708 | err = -ENOMEM; | |
2709 | goto destroy_loopb_wq; | |
2710 | } | |
2711 | ||
2712 | qp = scifdev->qpairs; | |
2713 | qp->magic = SCIFEP_MAGIC; | |
2714 | spin_lock_init(&qp->qp_send_lock); | |
2715 | spin_lock_init(&qp->qp_recv_lock); | |
2716 | init_waitqueue_head(&scifdev->sd_mmap_wq); | |
2717 | ||
2718 | local_q = kzalloc(NODE_QP_SIZE, GFP_KERNEL); | |
2719 | if (!local_q) { | |
2720 | printk(KERN_ERR "Ring Buffer Allocation Failed\n"); | |
2721 | err = -ENOMEM; | |
2722 | goto free_qpairs; | |
2723 | } | |
2724 | ||
2725 | /* | |
2726 | * For loopback the inbound_q and outbound_q are essentially the same | |
2727 | * since the Node sends a message on the loopback interface to the | |
2728 | * outbound_q which is then received on the inbound_q. | |
2729 | */ | |
2730 | micscif_rb_init(&qp->outbound_q, | |
2731 | &(scifdev->qpairs[0].local_read), | |
2732 | &(scifdev->qpairs[0].local_write), | |
2733 | local_q, | |
2734 | NODE_QP_SIZE); | |
2735 | ||
2736 | micscif_rb_init(&(qp->inbound_q), | |
2737 | &(scifdev->qpairs[0].local_read), | |
2738 | &(scifdev->qpairs[0].local_write), | |
2739 | local_q, | |
2740 | NODE_QP_SIZE); | |
2741 | ||
2742 | /* Launch the micscif_rb test */ | |
2743 | #ifdef ENABLE_TEST | |
2744 | micscif_qp_testboth(scifdev); | |
2745 | #endif | |
2746 | return err; | |
2747 | free_qpairs: | |
2748 | kfree(scifdev->qpairs); | |
2749 | destroy_loopb_wq: | |
2750 | destroy_workqueue(scifdev->sd_loopb_wq); | |
2751 | destroy_intr_wq: | |
2752 | destroy_workqueue(scifdev->sd_intr_wq); | |
2753 | error: | |
2754 | return err; | |
2755 | } | |
2756 | ||
2757 | /** | |
2758 | * micscif_destroy_loopback_qp - One time uninit work for Loopback Node Qp | |
2759 | * @scifdev: SCIF device | |
2760 | * | |
2761 | * Detroys the workqueues and frees up the Ring Buffer and Queue Pair memory. | |
2762 | */ | |
2763 | int micscif_destroy_loopback_qp(struct micscif_dev *scifdev) | |
2764 | { | |
2765 | micscif_destroy_interrupts(scifdev); | |
2766 | destroy_workqueue(scifdev->sd_loopb_wq); | |
2767 | kfree((void *)scifdev->qpairs->outbound_q.rb_base); | |
2768 | kfree(scifdev->qpairs); | |
2769 | return 0; | |
2770 | } | |
2771 | ||
2772 | #ifndef _MIC_SCIF_ | |
2773 | void micscif_destroy_p2p(mic_ctx_t *mic_ctx) | |
2774 | { | |
2775 | mic_ctx_t * mic_ctx_peer; | |
2776 | struct micscif_dev *mic_scif_dev; | |
2777 | struct micscif_dev *peer_dev; | |
2778 | struct scif_p2p_info *p2p; | |
2779 | struct list_head *pos, *tmp; | |
2780 | uint32_t bd; | |
2781 | ||
2782 | if (!mic_p2p_enable) | |
2783 | return; | |
2784 | ||
2785 | ||
2786 | /* FIXME: implement node deletion */ | |
2787 | mic_scif_dev = &scif_dev[mic_get_scifnode_id(mic_ctx)]; | |
2788 | ||
2789 | /* Free P2P mappings in the given node for all its peer nodes */ | |
2790 | list_for_each_safe(pos, tmp, &mic_scif_dev->sd_p2p) { | |
2791 | p2p = list_entry(pos, struct scif_p2p_info, | |
2792 | ppi_list); | |
2793 | ||
2794 | mic_unmap(mic_ctx->bi_id, p2p->ppi_mic_addr[PPI_MMIO], | |
2795 | p2p->ppi_len[PPI_MMIO] << PAGE_SHIFT); | |
2796 | mic_unmap(mic_ctx->bi_id, p2p->ppi_mic_addr[PPI_APER], | |
2797 | p2p->ppi_len[PPI_APER] << PAGE_SHIFT); | |
2798 | pci_unmap_sg(mic_ctx->bi_pdev, | |
2799 | p2p->ppi_sg[PPI_MMIO], p2p->sg_nentries[PPI_MMIO], PCI_DMA_BIDIRECTIONAL); | |
2800 | micscif_p2p_freesg(p2p->ppi_sg[PPI_MMIO]); | |
2801 | pci_unmap_sg(mic_ctx->bi_pdev, | |
2802 | p2p->ppi_sg[PPI_APER], p2p->sg_nentries[PPI_APER], PCI_DMA_BIDIRECTIONAL); | |
2803 | micscif_p2p_freesg(p2p->ppi_sg[PPI_APER]); | |
2804 | list_del(pos); | |
2805 | kfree(p2p); | |
2806 | } | |
2807 | ||
2808 | /* Free P2P mapping created in the peer nodes for the given node */ | |
2809 | for (bd = SCIF_HOST_NODE + 1; bd <= ms_info.mi_maxid; bd++) { | |
2810 | peer_dev = &scif_dev[bd]; | |
2811 | ||
2812 | list_for_each_safe(pos, tmp, &peer_dev->sd_p2p) { | |
2813 | p2p = list_entry(pos, struct scif_p2p_info, | |
2814 | ppi_list); | |
2815 | if (p2p->ppi_peer_id == mic_get_scifnode_id(mic_ctx)) { | |
2816 | ||
2817 | mic_ctx_peer = get_per_dev_ctx(peer_dev->sd_node - 1); | |
2818 | mic_unmap(mic_ctx_peer->bi_id, p2p->ppi_mic_addr[PPI_MMIO], | |
2819 | p2p->ppi_len[PPI_MMIO] << PAGE_SHIFT); | |
2820 | mic_unmap(mic_ctx_peer->bi_id, p2p->ppi_mic_addr[PPI_APER], | |
2821 | p2p->ppi_len[PPI_APER] << PAGE_SHIFT); | |
2822 | pci_unmap_sg(mic_ctx_peer->bi_pdev, | |
2823 | p2p->ppi_sg[PPI_MMIO], p2p->sg_nentries[PPI_MMIO], PCI_DMA_BIDIRECTIONAL); | |
2824 | micscif_p2p_freesg(p2p->ppi_sg[PPI_MMIO]); | |
2825 | pci_unmap_sg(mic_ctx_peer->bi_pdev, p2p->ppi_sg[PPI_APER], | |
2826 | p2p->sg_nentries[PPI_APER], PCI_DMA_BIDIRECTIONAL); | |
2827 | micscif_p2p_freesg(p2p->ppi_sg[PPI_APER]); | |
2828 | list_del(pos); | |
2829 | kfree(p2p); | |
2830 | } | |
2831 | } | |
2832 | } | |
2833 | } | |
2834 | #endif | |
2835 | ||
2836 | /** | |
2837 | * ONLY TEST CODE BELOW | |
2838 | */ | |
2839 | #ifdef ENABLE_TEST | |
2840 | #include <linux/sched.h> | |
2841 | #include <linux/workqueue.h> | |
2842 | #include "mic/micscif_nodeqp.h" | |
2843 | ||
2844 | static void micscif_rb_trigger_consumer(struct work_struct *work) | |
2845 | { | |
2846 | struct micscif_dev *scifdev = container_of(work, struct micscif_dev, consumer_work); | |
2847 | ||
2848 | while (scifdev->test_done == 0) { | |
2849 | cpu_relax(); | |
2850 | schedule(); | |
2851 | } | |
2852 | if (scifdev->test_done != 1) | |
2853 | printk(KERN_ERR "Consumer failed!\n"); | |
2854 | else | |
2855 | pr_debug("Test finished: Success\n"); | |
2856 | scifdev->test_done = 2; | |
2857 | } | |
2858 | ||
2859 | /** | |
2860 | * micscif_rb_trigger_producer | |
2861 | * This is the producer thread to create messages and update the | |
2862 | * RB write offset accordingly. | |
2863 | */ | |
2864 | static void micscif_rb_trigger_producer(struct work_struct *work) | |
2865 | { | |
2866 | struct nodemsg msg; | |
2867 | int count = 0; | |
2868 | struct micscif_dev *scifdev = container_of(work, struct micscif_dev, producer_work); | |
2869 | ||
2870 | msg.dst.node = scifdev->sd_node; | |
2871 | msg.uop = SCIF_TEST; | |
2872 | ||
2873 | while (count <= TEST_LOOP) { | |
2874 | msg.payload[0] = count++; | |
2875 | micscif_nodeqp_send(scifdev, &msg, NULL); | |
2876 | /* pr_debug(("Prod payload %llu\n", msg.payload[0]); */ | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | /* this is called from the host and the card at the same time on a queue pair. | |
2881 | * Each sets up a producer and a consumer and spins on the queue pair until done | |
2882 | */ | |
2883 | static void micscif_qp_testboth(struct micscif_dev *scifdev) | |
2884 | { | |
2885 | scifdev->count = 0; | |
2886 | scifdev->test_done = 0; | |
2887 | snprintf(scifdev->producer_name, sizeof(scifdev->producer_name), | |
2888 | "PRODUCER %d", scifdev->sd_node); | |
2889 | snprintf(scifdev->consumer_name, sizeof(scifdev->consumer_name), | |
2890 | "CONSUMER %d", scifdev->sd_node); | |
2891 | scifdev->producer = | |
2892 | __mic_create_singlethread_workqueue(scifdev->producer_name); | |
2893 | scifdev->consumer = | |
2894 | __mic_create_singlethread_workqueue(scifdev->consumer_name); | |
2895 | ||
2896 | INIT_WORK(&scifdev->producer_work, micscif_rb_trigger_producer); | |
2897 | INIT_WORK(&scifdev->consumer_work, micscif_rb_trigger_consumer); | |
2898 | ||
2899 | queue_work(scifdev->producer, &scifdev->producer_work); | |
2900 | queue_work(scifdev->consumer, &scifdev->consumer_work); | |
2901 | } | |
2902 | #endif |