| 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 |