2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * $Id: mthca_eq.c 1382 2004-12-24 02:21:02Z roland $
36 #include <linux/errno.h>
37 #include <linux/interrupt.h>
38 #include <linux/pci.h>
40 #include "mthca_dev.h"
41 #include "mthca_cmd.h"
42 #include "mthca_config_reg.h"
45 MTHCA_NUM_ASYNC_EQE = 0x80,
46 MTHCA_NUM_CMD_EQE = 0x80,
47 MTHCA_NUM_SPARE_EQE = 0x80,
48 MTHCA_EQ_ENTRY_SIZE = 0x20
52 * Must be packed because start is 64 bits but only aligned to 32 bits.
54 struct mthca_eq_context {
57 __be32 logsize_usrpage;
58 __be32 tavor_pd; /* reserved for Arbel */
61 __be32 arbel_pd; /* lost_count for Tavor */
64 __be32 consumer_index;
65 __be32 producer_index;
67 } __attribute__((packed));
69 #define MTHCA_EQ_STATUS_OK ( 0 << 28)
70 #define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28)
71 #define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28)
72 #define MTHCA_EQ_OWNER_SW ( 0 << 24)
73 #define MTHCA_EQ_OWNER_HW ( 1 << 24)
74 #define MTHCA_EQ_FLAG_TR ( 1 << 18)
75 #define MTHCA_EQ_FLAG_OI ( 1 << 17)
76 #define MTHCA_EQ_STATE_ARMED ( 1 << 8)
77 #define MTHCA_EQ_STATE_FIRED ( 2 << 8)
78 #define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8)
79 #define MTHCA_EQ_STATE_ARBEL ( 8 << 8)
82 MTHCA_EVENT_TYPE_COMP = 0x00,
83 MTHCA_EVENT_TYPE_PATH_MIG = 0x01,
84 MTHCA_EVENT_TYPE_COMM_EST = 0x02,
85 MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03,
86 MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE = 0x13,
87 MTHCA_EVENT_TYPE_SRQ_LIMIT = 0x14,
88 MTHCA_EVENT_TYPE_CQ_ERROR = 0x04,
89 MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05,
90 MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06,
91 MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07,
92 MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10,
93 MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11,
94 MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12,
95 MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08,
96 MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09,
97 MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f,
98 MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e,
99 MTHCA_EVENT_TYPE_CMD = 0x0a
102 #define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \
103 (1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \
104 (1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \
105 (1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \
106 (1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \
107 (1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \
108 (1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \
109 (1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
110 (1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \
111 (1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \
112 (1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \
113 (1ULL << MTHCA_EVENT_TYPE_ECC_DETECT))
114 #define MTHCA_SRQ_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \
115 (1ULL << MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE) | \
116 (1ULL << MTHCA_EVENT_TYPE_SRQ_LIMIT))
117 #define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD)
119 #define MTHCA_EQ_DB_INC_CI (1 << 24)
120 #define MTHCA_EQ_DB_REQ_NOT (2 << 24)
121 #define MTHCA_EQ_DB_DISARM_CQ (3 << 24)
122 #define MTHCA_EQ_DB_SET_CI (4 << 24)
123 #define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24)
134 } __attribute__((packed)) comp;
142 } __attribute__((packed)) cmd;
145 } __attribute__((packed)) qp;
148 } __attribute__((packed)) srq;
154 } __attribute__((packed)) cq_err;
158 } __attribute__((packed)) port_change;
162 } __attribute__((packed));
164 #define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7)
165 #define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7)
167 static inline u64 async_mask(struct mthca_dev *dev)
169 return dev->mthca_flags & MTHCA_FLAG_SRQ ?
170 MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK :
171 MTHCA_ASYNC_EVENT_MASK;
174 static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
178 doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn);
179 doorbell[1] = cpu_to_be32(ci & (eq->nent - 1));
182 * This barrier makes sure that all updates to ownership bits
183 * done by set_eqe_hw() hit memory before the consumer index
184 * is updated. set_eq_ci() allows the HCA to possibly write
185 * more EQ entries, and we want to avoid the exceedingly
186 * unlikely possibility of the HCA writing an entry and then
187 * having set_eqe_hw() overwrite the owner field.
190 mthca_write64(doorbell,
191 dev->kar + MTHCA_EQ_DOORBELL,
192 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
195 static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
197 /* See comment in tavor_set_eq_ci() above. */
199 __raw_writel((__force u32) cpu_to_be32(ci),
200 dev->eq_regs.arbel.eq_set_ci_base + eq->eqn * 8);
201 /* We still want ordering, just not swabbing, so add a barrier */
205 static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
207 if (mthca_is_memfree(dev))
208 arbel_set_eq_ci(dev, eq, ci);
210 tavor_set_eq_ci(dev, eq, ci);
213 static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
217 doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn);
220 mthca_write64(doorbell,
221 dev->kar + MTHCA_EQ_DOORBELL,
222 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
225 static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
227 writel(eqn_mask, dev->eq_regs.arbel.eq_arm);
230 static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
232 if (!mthca_is_memfree(dev)) {
235 doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn);
236 doorbell[1] = cpu_to_be32(cqn);
238 mthca_write64(doorbell,
239 dev->kar + MTHCA_EQ_DOORBELL,
240 MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
244 static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry)
246 unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE;
247 return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
250 static inline struct mthca_eqe* next_eqe_sw(struct mthca_eq *eq)
252 struct mthca_eqe* eqe;
253 eqe = get_eqe(eq, eq->cons_index);
254 return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe;
257 static inline void set_eqe_hw(struct mthca_eqe *eqe)
259 eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW;
262 static void port_change(struct mthca_dev *dev, int port, int active)
264 struct ib_event record;
266 mthca_dbg(dev, "Port change to %s for port %d\n",
267 active ? "active" : "down", port);
269 record.device = &dev->ib_dev;
270 record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
271 record.element.port_num = port;
273 ib_dispatch_event(&record);
276 static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq)
278 struct mthca_eqe *eqe;
283 while ((eqe = next_eqe_sw(eq))) {
285 * Make sure we read EQ entry contents after we've
286 * checked the ownership bit.
291 case MTHCA_EVENT_TYPE_COMP:
292 disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
293 disarm_cq(dev, eq->eqn, disarm_cqn);
294 mthca_cq_completion(dev, disarm_cqn);
297 case MTHCA_EVENT_TYPE_PATH_MIG:
298 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
302 case MTHCA_EVENT_TYPE_COMM_EST:
303 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
307 case MTHCA_EVENT_TYPE_SQ_DRAINED:
308 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
309 IB_EVENT_SQ_DRAINED);
312 case MTHCA_EVENT_TYPE_SRQ_QP_LAST_WQE:
313 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
314 IB_EVENT_QP_LAST_WQE_REACHED);
317 case MTHCA_EVENT_TYPE_SRQ_LIMIT:
318 mthca_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
319 IB_EVENT_SRQ_LIMIT_REACHED);
322 case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR:
323 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
327 case MTHCA_EVENT_TYPE_PATH_MIG_FAILED:
328 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
329 IB_EVENT_PATH_MIG_ERR);
332 case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
333 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
334 IB_EVENT_QP_REQ_ERR);
337 case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR:
338 mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
339 IB_EVENT_QP_ACCESS_ERR);
342 case MTHCA_EVENT_TYPE_CMD:
344 be16_to_cpu(eqe->event.cmd.token),
345 eqe->event.cmd.status,
346 be64_to_cpu(eqe->event.cmd.out_param));
349 case MTHCA_EVENT_TYPE_PORT_CHANGE:
351 (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3,
352 eqe->subtype == 0x4);
355 case MTHCA_EVENT_TYPE_CQ_ERROR:
356 mthca_warn(dev, "CQ %s on CQN %06x\n",
357 eqe->event.cq_err.syndrome == 1 ?
358 "overrun" : "access violation",
359 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
360 mthca_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
364 case MTHCA_EVENT_TYPE_EQ_OVERFLOW:
365 mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
368 case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR:
369 case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR:
370 case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR:
371 case MTHCA_EVENT_TYPE_ECC_DETECT:
373 mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n",
374 eqe->type, eqe->subtype, eq->eqn);
384 * The HCA will think the queue has overflowed if we
385 * don't tell it we've been processing events. We
386 * create our EQs with MTHCA_NUM_SPARE_EQE extra
387 * entries, so we must update our consumer index at
390 if (unlikely(set_ci >= MTHCA_NUM_SPARE_EQE)) {
392 * Conditional on hca_type is OK here because
393 * this is a rare case, not the fast path.
395 set_eq_ci(dev, eq, eq->cons_index);
401 * Rely on caller to set consumer index so that we don't have
402 * to test hca_type in our interrupt handling fast path.
407 static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr)
409 struct mthca_dev *dev = dev_ptr;
413 if (dev->eq_table.clr_mask)
414 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
416 ecr = readl(dev->eq_regs.tavor.ecr_base + 4);
420 writel(ecr, dev->eq_regs.tavor.ecr_base +
421 MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
423 for (i = 0; i < MTHCA_NUM_EQ; ++i)
424 if (ecr & dev->eq_table.eq[i].eqn_mask) {
425 if (mthca_eq_int(dev, &dev->eq_table.eq[i]))
426 tavor_set_eq_ci(dev, &dev->eq_table.eq[i],
427 dev->eq_table.eq[i].cons_index);
428 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
434 static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr)
436 struct mthca_eq *eq = eq_ptr;
437 struct mthca_dev *dev = eq->dev;
439 mthca_eq_int(dev, eq);
440 tavor_set_eq_ci(dev, eq, eq->cons_index);
441 tavor_eq_req_not(dev, eq->eqn);
443 /* MSI-X vectors always belong to us */
447 static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr)
449 struct mthca_dev *dev = dev_ptr;
453 if (dev->eq_table.clr_mask)
454 writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
456 for (i = 0; i < MTHCA_NUM_EQ; ++i)
457 if (mthca_eq_int(dev, &dev->eq_table.eq[i])) {
459 arbel_set_eq_ci(dev, &dev->eq_table.eq[i],
460 dev->eq_table.eq[i].cons_index);
463 arbel_eq_req_not(dev, dev->eq_table.arm_mask);
465 return IRQ_RETVAL(work);
468 static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr)
470 struct mthca_eq *eq = eq_ptr;
471 struct mthca_dev *dev = eq->dev;
473 mthca_eq_int(dev, eq);
474 arbel_set_eq_ci(dev, eq, eq->cons_index);
475 arbel_eq_req_not(dev, eq->eqn_mask);
477 /* MSI-X vectors always belong to us */
481 static int mthca_create_eq(struct mthca_dev *dev,
487 u64 *dma_list = NULL;
489 struct mthca_mailbox *mailbox;
490 struct mthca_eq_context *eq_context;
496 eq->nent = roundup_pow_of_two(max(nent, 2));
497 npages = ALIGN(eq->nent * MTHCA_EQ_ENTRY_SIZE, PAGE_SIZE) / PAGE_SIZE;
499 eq->page_list = kmalloc(npages * sizeof *eq->page_list,
504 for (i = 0; i < npages; ++i)
505 eq->page_list[i].buf = NULL;
507 dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
511 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
514 eq_context = mailbox->buf;
516 for (i = 0; i < npages; ++i) {
517 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
518 PAGE_SIZE, &t, GFP_KERNEL);
519 if (!eq->page_list[i].buf)
520 goto err_out_free_pages;
523 pci_unmap_addr_set(&eq->page_list[i], mapping, t);
525 clear_page(eq->page_list[i].buf);
528 for (i = 0; i < eq->nent; ++i)
529 set_eqe_hw(get_eqe(eq, i));
531 eq->eqn = mthca_alloc(&dev->eq_table.alloc);
533 goto err_out_free_pages;
535 err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
536 dma_list, PAGE_SHIFT, npages,
537 0, npages * PAGE_SIZE,
538 MTHCA_MPT_FLAG_LOCAL_WRITE |
539 MTHCA_MPT_FLAG_LOCAL_READ,
542 goto err_out_free_eq;
544 memset(eq_context, 0, sizeof *eq_context);
545 eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK |
547 MTHCA_EQ_STATE_ARMED |
549 if (mthca_is_memfree(dev))
550 eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL);
552 eq_context->logsize_usrpage = cpu_to_be32((ffs(eq->nent) - 1) << 24);
553 if (mthca_is_memfree(dev)) {
554 eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num);
556 eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
557 eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num);
559 eq_context->intr = intr;
560 eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey);
562 err = mthca_SW2HW_EQ(dev, mailbox, eq->eqn, &status);
564 mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err);
565 goto err_out_free_mr;
568 mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n",
571 goto err_out_free_mr;
575 mthca_free_mailbox(dev, mailbox);
577 eq->eqn_mask = swab32(1 << eq->eqn);
580 dev->eq_table.arm_mask |= eq->eqn_mask;
582 mthca_dbg(dev, "Allocated EQ %d with %d entries\n",
588 mthca_free_mr(dev, &eq->mr);
591 mthca_free(&dev->eq_table.alloc, eq->eqn);
594 for (i = 0; i < npages; ++i)
595 if (eq->page_list[i].buf)
596 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
597 eq->page_list[i].buf,
598 pci_unmap_addr(&eq->page_list[i],
601 mthca_free_mailbox(dev, mailbox);
604 kfree(eq->page_list);
611 static void mthca_free_eq(struct mthca_dev *dev,
614 struct mthca_mailbox *mailbox;
617 int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
621 mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
625 err = mthca_HW2SW_EQ(dev, mailbox, eq->eqn, &status);
627 mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err);
629 mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n", status);
631 dev->eq_table.arm_mask &= ~eq->eqn_mask;
634 mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
635 for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) {
637 printk("[%02x] ", i * 4);
638 printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
639 if ((i + 1) % 4 == 0)
644 mthca_free_mr(dev, &eq->mr);
645 for (i = 0; i < npages; ++i)
646 pci_free_consistent(dev->pdev, PAGE_SIZE,
647 eq->page_list[i].buf,
648 pci_unmap_addr(&eq->page_list[i], mapping));
650 kfree(eq->page_list);
651 mthca_free_mailbox(dev, mailbox);
654 static void mthca_free_irqs(struct mthca_dev *dev)
658 if (dev->eq_table.have_irq)
659 free_irq(dev->pdev->irq, dev);
660 for (i = 0; i < MTHCA_NUM_EQ; ++i)
661 if (dev->eq_table.eq[i].have_irq)
662 free_irq(dev->eq_table.eq[i].msi_x_vector,
663 dev->eq_table.eq + i);
666 static int mthca_map_reg(struct mthca_dev *dev,
667 unsigned long offset, unsigned long size,
670 unsigned long base = pci_resource_start(dev->pdev, 0);
672 if (!request_mem_region(base + offset, size, DRV_NAME))
675 *map = ioremap(base + offset, size);
677 release_mem_region(base + offset, size);
684 static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset,
685 unsigned long size, void __iomem *map)
687 unsigned long base = pci_resource_start(dev->pdev, 0);
689 release_mem_region(base + offset, size);
693 static int mthca_map_eq_regs(struct mthca_dev *dev)
695 if (mthca_is_memfree(dev)) {
697 * We assume that the EQ arm and EQ set CI registers
698 * fall within the first BAR. We can't trust the
699 * values firmware gives us, since those addresses are
700 * valid on the HCA's side of the PCI bus but not
701 * necessarily the host side.
703 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
704 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
706 mthca_err(dev, "Couldn't map interrupt clear register, "
712 * Add 4 because we limit ourselves to EQs 0 ... 31,
713 * so we only need the low word of the register.
715 if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
716 dev->fw.arbel.eq_arm_base) + 4, 4,
717 &dev->eq_regs.arbel.eq_arm)) {
718 mthca_err(dev, "Couldn't map EQ arm register, aborting.\n");
719 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
720 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
725 if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
726 dev->fw.arbel.eq_set_ci_base,
727 MTHCA_EQ_SET_CI_SIZE,
728 &dev->eq_regs.arbel.eq_set_ci_base)) {
729 mthca_err(dev, "Couldn't map EQ CI register, aborting.\n");
730 mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
731 dev->fw.arbel.eq_arm_base) + 4, 4,
732 dev->eq_regs.arbel.eq_arm);
733 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
734 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
739 if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
741 mthca_err(dev, "Couldn't map interrupt clear register, "
746 if (mthca_map_reg(dev, MTHCA_ECR_BASE,
747 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
748 &dev->eq_regs.tavor.ecr_base)) {
749 mthca_err(dev, "Couldn't map ecr register, "
751 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
761 static void mthca_unmap_eq_regs(struct mthca_dev *dev)
763 if (mthca_is_memfree(dev)) {
764 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
765 dev->fw.arbel.eq_set_ci_base,
766 MTHCA_EQ_SET_CI_SIZE,
767 dev->eq_regs.arbel.eq_set_ci_base);
768 mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
769 dev->fw.arbel.eq_arm_base) + 4, 4,
770 dev->eq_regs.arbel.eq_arm);
771 mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
772 dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
775 mthca_unmap_reg(dev, MTHCA_ECR_BASE,
776 MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
777 dev->eq_regs.tavor.ecr_base);
778 mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
783 int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt)
789 * We assume that mapping one page is enough for the whole EQ
790 * context table. This is fine with all current HCAs, because
791 * we only use 32 EQs and each EQ uses 32 bytes of context
792 * memory, or 1 KB total.
794 dev->eq_table.icm_virt = icm_virt;
795 dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
796 if (!dev->eq_table.icm_page)
798 dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0,
799 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
800 if (pci_dma_mapping_error(dev->eq_table.icm_dma)) {
801 __free_page(dev->eq_table.icm_page);
805 ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status);
809 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
810 PCI_DMA_BIDIRECTIONAL);
811 __free_page(dev->eq_table.icm_page);
817 void mthca_unmap_eq_icm(struct mthca_dev *dev)
821 mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status);
822 pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
823 PCI_DMA_BIDIRECTIONAL);
824 __free_page(dev->eq_table.icm_page);
827 int mthca_init_eq_table(struct mthca_dev *dev)
834 err = mthca_alloc_init(&dev->eq_table.alloc,
836 dev->limits.num_eqs - 1,
837 dev->limits.reserved_eqs);
841 err = mthca_map_eq_regs(dev);
845 if (dev->mthca_flags & MTHCA_FLAG_MSI ||
846 dev->mthca_flags & MTHCA_FLAG_MSI_X) {
847 dev->eq_table.clr_mask = 0;
849 dev->eq_table.clr_mask =
850 swab32(1 << (dev->eq_table.inta_pin & 31));
851 dev->eq_table.clr_int = dev->clr_base +
852 (dev->eq_table.inta_pin < 32 ? 4 : 0);
855 dev->eq_table.arm_mask = 0;
857 intr = (dev->mthca_flags & MTHCA_FLAG_MSI) ?
858 128 : dev->eq_table.inta_pin;
860 err = mthca_create_eq(dev, dev->limits.num_cqs + MTHCA_NUM_SPARE_EQE,
861 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr,
862 &dev->eq_table.eq[MTHCA_EQ_COMP]);
866 err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE + MTHCA_NUM_SPARE_EQE,
867 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr,
868 &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
872 err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE + MTHCA_NUM_SPARE_EQE,
873 (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr,
874 &dev->eq_table.eq[MTHCA_EQ_CMD]);
878 if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
879 static const char *eq_name[] = {
880 [MTHCA_EQ_COMP] = DRV_NAME " (comp)",
881 [MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
882 [MTHCA_EQ_CMD] = DRV_NAME " (cmd)"
885 for (i = 0; i < MTHCA_NUM_EQ; ++i) {
886 err = request_irq(dev->eq_table.eq[i].msi_x_vector,
887 mthca_is_memfree(dev) ?
888 mthca_arbel_msi_x_interrupt :
889 mthca_tavor_msi_x_interrupt,
890 0, eq_name[i], dev->eq_table.eq + i);
893 dev->eq_table.eq[i].have_irq = 1;
896 err = request_irq(dev->pdev->irq,
897 mthca_is_memfree(dev) ?
898 mthca_arbel_interrupt :
899 mthca_tavor_interrupt,
900 IRQF_SHARED, DRV_NAME, dev);
903 dev->eq_table.have_irq = 1;
906 err = mthca_MAP_EQ(dev, async_mask(dev),
907 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
909 mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
910 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err);
912 mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n",
913 dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status);
915 err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
916 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
918 mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n",
919 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err);
921 mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
922 dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
924 for (i = 0; i < MTHCA_NUM_EQ; ++i)
925 if (mthca_is_memfree(dev))
926 arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
928 tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
933 mthca_free_irqs(dev);
934 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]);
937 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
940 mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]);
943 mthca_unmap_eq_regs(dev);
946 mthca_alloc_cleanup(&dev->eq_table.alloc);
950 void mthca_cleanup_eq_table(struct mthca_dev *dev)
955 mthca_free_irqs(dev);
957 mthca_MAP_EQ(dev, async_mask(dev),
958 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
959 mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
960 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
962 for (i = 0; i < MTHCA_NUM_EQ; ++i)
963 mthca_free_eq(dev, &dev->eq_table.eq[i]);
965 mthca_unmap_eq_regs(dev);
967 mthca_alloc_cleanup(&dev->eq_table.alloc);